CN112641568B - Supporting device and transfer vehicle - Google Patents

Abstract

The present application discloses a support device and a transfer vehicle. The transfer vehicle includes a support device and a transfer device. The support device includes a support frame, a pressure-bearing member and a lifting mechanism; the support frame includes an entry and exit side, the pressure-bearing member is movably arranged on the support frame, and the pressure-bearing member includes a pressure-bearing surface; the lifting mechanism is used to lift the pressure-bearing member so that the pressure-bearing surface is tilted downward in the entry and exit side direction. The transfer device includes a transfer plate and a driving mechanism, the transfer plate is movably arranged on the pressure-bearing member, and the driving mechanism is used to drive the transfer plate to reciprocate in the entry and exit side direction. In this way, the transfer vehicle can realize the transfer and transportation of patients or subjects on a curved bed.

Description

Supporting device and transfer vehicle

Technical Field

The application relates to the technical field of medical equipment, in particular to a supporting device and a transfer trolley.

Background

In the daily operation of hospitals, it is often the case that patients or subjects need to be handled. The transport sites are various, such as ambulances, wards, contrast rooms, etc., and the transport carriers are different, such as hospital beds, scanning beds of CT (Computed Tomography, i.e., computerized tomography) machines, and scanning beds of MRI (Magnetic ResonanceImaging ) machines, etc.

Currently, in the transportation of patients or subjects who are inconvenient to move, staff in hospitals assist in the transportation by means of a transfer cart. Conventional transfer carts are generally capable of carrying in and out a patient or a person to be tested on a flat bed, but are difficult to carry out when carrying a patient or a person to be tested on a curved bed.

Disclosure of Invention

Based on this, it is necessary to provide a supporting device and a transfer cart for carrying a patient or a person to be tested with a curved bed.

The technical scheme is as follows:

On one hand, the application provides a supporting device which comprises a supporting frame, a pressure-bearing piece and a lifting mechanism, wherein the supporting frame comprises an inlet side and an outlet side, the pressure-bearing piece is movably arranged on the supporting frame and comprises a pressure-bearing surface, and the lifting mechanism is used for jacking the pressure-bearing piece to enable the pressure-bearing surface to incline downwards in the direction of the inlet side and the outlet side.

When the supporting device is applied to transferring a patient or a detected person on a curved surface bed, the lifting mechanism acts to jack up the pressure bearing piece, so that the pressure bearing face is inclined downwards in the direction of the in-out side, and further the transfer plate arranged on the pressure bearing face can be inclined downwards in the direction of the in-out side. Thus, the transfer plate can be inserted downward under the patient or the subject on the curved bed, and the patient or the subject on the curved bed can be transported.

The technical scheme is further described as follows:

In one embodiment, the pressure bearing member is rotatably connected with the supporting frame, and the supporting frame is provided with a limiting part for supporting the pressure bearing member.

In one embodiment, the lifting mechanism comprises a lever and a first driving unit, the lever is rotatably arranged in the supporting frame, one end of the lever abuts against the bottom wall of the pressure-bearing piece, and the first driving unit is used for driving the lever to rotate so as to jack up the pressure-bearing piece.

In one embodiment, the first driving unit includes an elastic member, one end of the elastic member is connected with the supporting frame, and the other end of the elastic member is connected with the other end of the lever, so that the lever can jack up the pressure bearing member when the elastic member is reset.

In one embodiment, the support device further comprises a reset mechanism for resetting the pressure-bearing member or resetting the lever such that the elastic member is compressed or stretched.

In one embodiment, the reset mechanism comprises a first transmission part and a second driving unit capable of self-locking, one end of the first transmission part is connected with the lever or the pressure-bearing part, and the second driving unit drives the pressure-bearing part to reset or the lever to reset through the first transmission part, so that the elastic part is compressed or stretched.

In one embodiment, the first transmission member is a flexible member, and the second driving unit includes a telescopic end fixedly connected to the flexible member, or the second driving unit includes a rotating end fixedly connected to the flexible member.

The second driving unit comprises a connecting rod assembly arranged on the supporting frame and a swing rod driving the connecting rod assembly to move, wherein the connecting rod assembly can be self-locked, and the connecting rod assembly is provided with a telescopic end;

Or the second driving unit comprises a first nut which is slidably arranged on the supporting frame, a first screw rod which is rotatably arranged on the supporting frame and a first hand-operated piece which drives the first screw rod to rotate, the first screw rod is in transmission fit with the first nut, and the telescopic end is arranged on the first nut.

In one embodiment, the lifting mechanism is one of a rack and pinion telescoping mechanism, a lead screw first nut telescoping mechanism, a link telescoping mechanism, or a retractor.

On the other hand, the application also provides a transfer vehicle which comprises the supporting device in any embodiment, and further comprises a transfer device, wherein the transfer device comprises a transfer plate and a driving mechanism, the transfer plate is movably arranged on the pressure bearing piece, and the driving mechanism is used for driving the transfer plate to reciprocate in the direction of the inlet side and the outlet side.

When the transfer trolley is used, when a patient or a detected person on the curved surface bed needs to be transferred, the lifting mechanism acts to jack up the pressure bearing piece, so that the pressure bearing face is inclined downwards in the direction of the in-out side, and further the transfer plate arranged on the pressure bearing face can be inclined downwards in the direction of the in-out side. Thus, the driving mechanism acts to drive the transfer plate to be downwards inserted into the patient or the person under test on the curved bed, then the driving mechanism acts again to move the patient or the person under test into the transfer plate, and the operation is repeated for a plurality of times, so that the patient or the person under test can be completely moved into the transfer plate, and finally the patient or the person under test is transferred onto the transfer vehicle, so that the patient or the person under test on the curved bed is carried.

The technical scheme is further described as follows:

In one embodiment, the transfer plate comprises a first plate body, a first flexible sleeve, a second plate body and a second flexible sleeve, wherein the first plate body is movably arranged above the pressure bearing piece, the driving mechanism can drive the first plate body to reciprocate in the in-out side direction, the first flexible sleeve is movably sleeved on the first plate body, the first flexible sleeve is fixedly arranged on the pressure bearing piece, the second plate body is fixedly arranged above the first plate body, the second flexible sleeve is movably sleeved on the second plate body to form a movable plate surface, the second flexible sleeve is in friction fit with the first flexible sleeve, the transfer device further comprises a locking mechanism, the locking mechanism is arranged on the transfer plate and used for locking the second flexible sleeve and the second plate body, and when the locking mechanism is released, the first plate body can drive the second flexible sleeve to rotate through the first flexible sleeve.

In one embodiment, the transfer plate further comprises a pressing bar and a fastening assembly, wherein the pressing bar presses the first flexible sleeve and is matched with the fastening assembly to press and fix the first flexible sleeve on the pressure bearing piece.

In one embodiment, the support frame is provided with support legs and wheels rotatably arranged on the support legs, and/or the support device further comprises two guardrails which are arranged on two opposite sides of the pressure bearing piece at intervals, and the guardrails can be detachably or rotatably arranged so that the transfer plate can move out of the pressure bearing piece, and/or the transfer device further comprises a binding belt, two ends of the binding belt are fixedly arranged on the transfer plate to form binding parts, and at least one end of the binding belt is detachably connected with the transfer plate, or the binding belt comprises a first belt body and a second belt body detachably connected with the first belt body.

In one embodiment, the driving mechanism comprises a flexible transmission part and a driver, the flexible transmission part is fixedly connected with the transfer plate, and the driver is used for driving the transfer plate to reciprocate in the in-out side direction through the flexible transmission part.

In one embodiment, the flexible transmission piece comprises a first transmission belt and a second transmission belt, the driver can drive the transfer plate to move in a direction far away from the pressure bearing piece through the first transmission belt, and the driver can drive the transfer plate to move in a direction close to the pressure bearing piece through the second transmission belt.

In one embodiment, one end of a first driving belt is fixedly connected with a transfer plate, the other end of the first driving belt is fixedly connected with a support frame, a driving mechanism comprises a first movable pulley and a first fixed pulley which are respectively in transmission fit with the first driving belt, the first movable pulley can move relative to the support frame, the first fixed pulley is arranged on the support frame, one end of a second driving belt is fixedly connected with the transfer plate, the other end of the second driving belt is fixedly connected with the support frame, the driving mechanism comprises a second movable pulley and a second fixed pulley which are respectively in transmission fit with the second driving belt, the second movable pulley can move relative to the support frame, the second fixed pulley is arranged on the support frame and is respectively arranged on two opposite sides of the pressure bearing piece at intervals with the first fixed pulley, and a driver is used for driving the first movable pulley and the second movable pulley to move.

In one embodiment, the driving mechanism comprises a sliding part in sliding connection with the supporting frame, the driver is used for driving the sliding part to move, and the first movable pulley and the second movable pulley are fixedly arranged on the sliding part.

In one embodiment, the driver comprises a second screw rod rotatably arranged on the support frame, one end of the second screw rod is provided with a second rocking member, the other end of the second screw rod is rotatably connected with the sliding member, the driver further comprises a second nut in spiral transmission fit with the second screw rod, and the second nut is fixedly arranged on the support frame.

In one embodiment, the flexible transmission member is a belt, the corresponding driving mechanism is a belt driving mechanism, or the flexible transmission member is a chain, the corresponding driving mechanism is a chain driving mechanism, or the flexible transmission member is a track, and the corresponding driving mechanism is a track driving mechanism.

In one embodiment, the driving mechanism is disposed in the pressure bearing member and is capable of moving along with the pressure bearing member, and the driving mechanism is staggered with the transfer plate.

Drawings

Fig. 1 is a schematic structural view of a transfer cart in an embodiment.

Fig. 2 is a schematic structural view of a transfer cart in an embodiment.

FIG. 3 is a schematic side view of a transfer cart in accordance with one embodiment.

Fig. 4 is a schematic view of a usage state of the transfer cart according to an embodiment.

Fig. 5 is a schematic side view of a support device (with a portion of the support structure hidden) according to an embodiment.

Fig. 6 is a schematic view of the lever shown in fig. 5.

Fig. 7 is a schematic structural view of the support structure shown in fig. 5 (the elastic member is in a reset state).

Fig. 8 is a schematic structural view of the second driving unit shown in fig. 7.

Fig. 9 is a schematic structural view of the support structure shown in fig. 5 (the pressure-receiving member is in a reset state).

Fig. 10 is a schematic structural view of the second driving unit shown in fig. 9.

Fig. 11 is a schematic structural view of a second driving unit according to another embodiment.

Fig. 12 is a schematic structural view of a support structure according to another embodiment (the elastic member is in a reset state).

Fig. 13 is an enlarged partial schematic view of the assembly structure of the transfer plate shown in an embodiment.

FIG. 14 is a schematic view of an assembly of a locking mechanism and a transfer plate according to one embodiment.

Fig. 15 is a schematic view of the locking mechanism shown in fig. 14.

Fig. 16 is a schematic structural view of a driving mechanism installed on a supporting frame according to an embodiment.

Fig. 17 is a partial structural assembly schematic view of the flexible transmission member and the driving mechanism shown in fig. 16.

Fig. 18 is a schematic structural view of a transfer device shown in an embodiment.

Reference numerals illustrate:

10. 100 parts of supporting device, 110 parts of supporting frame, an inlet and outlet side, 120 parts of limiting part, 130 parts of supporting foot, 140 parts of supporting frame, wheels, 200 parts of supporting frame, 210 parts of supporting frame, 300 parts of lifting mechanism, 310 parts of lever, 312 parts of roller, 320 parts of first driving unit, 322 parts of elastic piece, 400 parts of resetting mechanism, 410 parts of first driving unit, 420 parts of second driving unit, 402 parts of telescopic end, 421 parts of connecting rod assembly, 422 parts of swinging rod, 423 parts of first nut, 424 parts of first screw rod, 425 parts of first swinging piece.

20. The device comprises a transferring device, 500, a transferring plate, 510, a first plate body, 520, a first flexible sleeve, 530, a second plate body, 540, a second flexible sleeve, 550, a pressing bar, 560, a fastening component, 600, a driving mechanism, 610, a flexible transmission piece, 612, a first transmission belt, 614, a second transmission belt, 620, a driver, 622, a second screw rod, 624, a second rocking piece, 626, a second nut, 630, a first movable pulley, 640, a first fixed pulley, 650, a second movable pulley, 660, a second fixed pulley, 670, a sliding piece, 700, a locking mechanism, 800, a binding belt, 810, a binding part, 900 and a curved surface bed.

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

Detailed Description

The present application will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the application.

Currently, most of the scan beds of CT machines and MRI machines are curved beds. When a patient or a person to be detected with inconvenient movement needs to be moved away from the curved surface bed, the transfer plate of the traditional transfer vehicle (also called a transfer bed) can only be horizontally fed, so that the curved surface transfer is difficult to adapt to. Therefore, the transportation is usually performed manually, which not only has low transportation efficiency, but also has high transportation labor intensity, and is not beneficial to fully utilizing the scanning efficiency of the scanning equipment. In particular, when a situation is encountered in which a scanning device is required to be used at a high frequency, the above-described manner of manual handling has been difficult to accommodate.

Therefore, it is necessary to improve the conventional transfer cart, and the application provides a supporting device, which enables the supporting surface to incline downwards, and further enables the transfer plate to be inserted downwards below the body of the patient or the tested person on the curved surface bed, so that the transfer plate is used for carrying the patient or the tested person on the curved surface bed, the carrying efficiency is improved, the carrying labor intensity is reduced, the scanning capability of the scanning equipment is matched, and the use frequency of the scanning equipment is improved.

For a better understanding of the support device of the present application, a transfer cart to which the support device is applied will be described below.

As shown in fig. 1 to 4, in one embodiment, a transfer cart is provided, which includes a support device 10 and a transfer device 20.

As shown in fig. 1 to 3, the supporting device 10 includes a supporting frame 100, a pressure-bearing member 200 and a lifting mechanism 300, wherein the supporting frame 100 includes an access side 110, the pressure-bearing member 200 is movably disposed on the supporting frame 100, the pressure-bearing member 200 includes a pressure-bearing surface 210, and the lifting mechanism 300 is used for lifting the pressure-bearing member 200 so that the pressure-bearing surface 210 is inclined downward toward the access side 110. Thus, when it is necessary to transfer the patient or the subject on the curved bed 900, the lifting mechanism 300 is operated to lift the pressure receiving member 200 so that the pressure receiving surface 210 is inclined downward in the direction of the inlet/outlet side 110.

As shown in fig. 1 to 3, the transfer device 20 includes a transfer plate 500 and a driving mechanism 600, wherein the transfer plate 500 is movably disposed on the pressure-bearing member 200, and the driving mechanism 600 is used for driving the transfer plate 500 to reciprocate toward the in-out side 110.

Thus, when the patient or the person to be tested on the curved bed 900 is to be transferred during the use of the transfer cart, the lifting mechanism 300 acts to jack up the pressure-bearing member 200, so that the pressure-bearing surface 210 is inclined downward toward the in-out side 110, and further, the transfer plate 500 disposed on the pressure-bearing surface 210 is also inclined downward toward the in-out side 110 (as shown in fig. 4). Thus, the driving mechanism 600 is operated to drive the transfer plate 500 to be inserted downward under the patient or the examinee on the curved bed 900, and then the driving mechanism 600 is operated again to move the patient or the examinee into the transfer plate 500, or the insertion-movement can be repeated a plurality of times according to the position where the patient or the examinee enters the transfer plate 500, so that the patient or the examinee can be completely moved into the transfer plate 500. Finally, the pressure bearing piece 200 can be reset, so that the driving mechanism 600 drives the transfer plate 500 to move, and the patient or the tested person is transferred to the transfer vehicle, so that the patient or the tested person of the curved bed 900 is carried.

The transfer vehicle is particularly applied to a scanning scene, can improve the conveying efficiency, fully utilizes the scanning capability of the scanning equipment to adapt to the situation that the scanning equipment is required to be used at high frequency, can reduce the labor intensity of conveying the scanning equipment, can reduce the number of people for conveying the detected person, and reduces the manpower resources required to be equipped by the scanning equipment.

Meanwhile, it can be appreciated that when the pressure bearing member 200 is not lifted by the lifting mechanism 300 (i.e., when the lifting mechanism 300 is not operated), the transfer plate 500 can be fed laterally to adapt to the transfer of the patient or the person to be detected on the horizontal bed surface, so that the transfer cart can adapt to the transfer of the curved bed 900 and the transfer of the horizontal bed surface.

It should be noted that the specific implementation of the "lifting mechanism 300" includes, but is not limited to, a telescopic mechanism, a jacking mechanism, and the like. And the power supply can be electric or manual.

The specific structure of the "pressure receiving member 200" includes, but is not limited to, a pressure receiving frame (i.e., a frame structure), a pressure receiving plate (a plate structure), and the like.

The "transfer plate 500" may be capable of transferring a patient or a subject, and its specific structure includes, but is not limited to, a plate-like structure.

On the basis of the above embodiment, in one embodiment, the pressure bearing member 200 is rotatably connected with the supporting frame 100, and the supporting frame 100 is provided with the limiting portion 120 for supporting the pressure bearing member 200. In this way, the pressure bearing piece 200 is rotatably connected with the support frame 100, so that the pressure bearing piece 200 cannot displace in the rotating process, and a patient or a detected person can be safely transferred into the transfer vehicle. Meanwhile, the pressure-bearing member 200 is restrained and supported by the restraining portion 120, so that the pressure-bearing member 200 can be automatically reset to a preset position, such as a horizontal state, so that a patient or a person to be detected on the transfer plate 500 can be placed flat.

On the basis of any of the above embodiments, as shown in fig. 5, in one embodiment, the lifting mechanism 300 includes a lever 310 and a first driving unit 320, the lever 310 is rotatably disposed in the support frame 100, one end of the lever 310 abuts against the bottom wall of the pressure bearing member 200, and the first driving unit 320 is used for driving the lever 310 to rotate so as to jack up the pressure bearing member 200. In this way, the supporting member 200 is lifted up by the cooperation of the lever and the first driving unit 320, which is easy to implement. Meanwhile, the jacking force of the jacking pressure bearing piece 200 and the transfer plate 500 is convenient to adjust by utilizing the lever principle.

For example, in an alternative embodiment, lever 310 is a labor-saving lever 310. In this way, the force applied by the jacking-up of the pressure-receiving member 200 and the transfer plate 500 can be reduced, and the labor intensity or the implementation difficulty can be further reduced.

Alternatively, as shown in fig. 6, in one embodiment, the lever 310 includes a roller 312 that abuts the bottom wall of the pressure bearing member 200. In this way, friction between the lever and the pressure-bearing member 200 can be reduced, and the device can adapt to the change of the stress position generated when the pressure-bearing member 200 rotates, and the transition is stable.

On the basis of any one of the above embodiments of the lever, as shown in fig. 7 and 9, in one embodiment, the first driving unit 320 includes an elastic member 322, one end of the elastic member 322 is connected with the support frame 100, and the other end of the elastic member 322 is connected with the other end of the lever 310, so that the lever can jack up the pressure bearing member 200 when the elastic member 322 is reset. Therefore, the pressure bearing piece 200 can be jacked up only by elastic force of the elastic piece 322 or not to carry out elastic reset, which is beneficial to improving the efficiency and is simple and convenient to operate.

It should be noted that the "elastic member 322" includes, but is not limited to, an extension spring, a compression spring, a gas spring, an elastic gel, a spring plate, and the like. The selection may be made according to the restoring force required by the lever to jack up the pressure bearing member 200.

Such as a tension spring, is disposed at an end remote from the pressure bearing member 200. Or a compression spring, elastic colloid or elastic sheet is disposed near one end of the pressure bearing member 200.

On the basis of the above embodiment, as shown in fig. 5, in an embodiment, the supporting device 10 further includes a restoring mechanism 400, where the restoring mechanism 400 is used to restore the pressure bearing member 200 or restore the lever 310, so that the elastic member 322 is compressed or stretched. In this way, the elastic member 322 can be in a non-reset state by using the reset mechanism 400, so that the pressure bearing member 200 can be in a non-jacking reset state, that is, the transfer plate 500 can move laterally at this time, so as to be convenient for adapting to the transfer of a patient or a tested person on a horizontal bed surface. And the elastic piece 322 can be elastically reset only by unlocking the reset mechanism 400, so that the pressure-bearing piece 200 is jacked up, and the operation is simple and convenient.

On the basis of the above embodiment, as shown in fig. 7 to 12, in an embodiment, the reset mechanism 400 includes a first transmission member 410 and a second driving unit 420 capable of self-locking, one end of the first transmission member 410 is connected with the lever 310 or connected with the pressure-bearing member 200, and the second driving unit 420 drives the pressure-bearing member 200 to reset or the lever 310 to reset through the first transmission member 410, so that the elastic member 322 is compressed or stretched.

Optionally, in an embodiment, the height of the lever 310 moving upwards is adjustable, so that the inclination angle of the bearing surface 210 is adjustable. The connection position between the elastic member 322 and the lever 310, or the connection position between the first transmission member 410 and the lever 310, or the length of the lever 310, etc. may be adjustable.

Based on the above embodiments, as shown in fig. 7, 8 and 10, in an embodiment, the first transmission member 410 is a flexible member, the second driving unit 420 includes a telescopic end 402, and the telescopic end 402 is fixedly connected to the flexible member, or the second driving unit 420 includes a rotating end (not shown), and the rotating end is fixedly connected to the flexible member. In this way, the flexible member is used to stretch the power or rotate the power, so that the lever rotates upwards, the elastic member 322 can automatically reset to lift the lever up the patient or the tested person, and meanwhile, when the patient or the tested person can move onto the pressure-bearing member 200 along with the transfer plate 500, the flexible member can deform and is not interfered by the second driving unit 420, so that the pressure-bearing member 200 can be automatically pressed down, the lifting mechanism 300 is not required to be frequently operated in the process, the operation steps are simplified, and the transfer efficiency is improved. That is, after the pressure-bearing member 200 is lifted, when the pressure on the pressure-bearing member 200 is greater than the restoring force of the elastic member 322, the pressure-bearing member 200 can be automatically pushed down, so that the elastic member 322 is in a non-restoring state, and after the pressure is removed, the pressure-bearing member 200 can be automatically lifted, so that the insertion-moving-in steps can be repeated, and the patient or the person to be detected can move right above the pressure-bearing member 200.

In this embodiment, as shown in fig. 7 to 10, the flexible member is a brake cable, the second driving unit 420 includes a connecting rod assembly 421 disposed on the supporting frame 100 and a swing rod 422 driving the connecting rod assembly 421 to move, the connecting rod assembly 421 can be self-locked, and the connecting rod assembly 421 is provided with a telescopic end 402. In this way, the swing rod 422 drives the connecting rod assembly 421 to move, so that the telescopic end 402 can retract, and then the lever 310 is pulled to move downwards through the brake cable, the lever 310 is reset, the pressure bearing piece 200 is also reset, and at the moment, the connecting rod assembly 421 can be self-locked, and the elastic piece 322 is in a non-reset state (of course, the elastic piece can bear the weight of a patient or a tested person and is in a non-reset state, namely, is in tension or compression). And the swing rod 422 drives the connecting rod assembly 421 to move reversely, so that the telescopic end 402 can extend out, and the lever 310 can move upwards under the reset force of the elastic piece 322 to jack up the pressure bearing piece 200.

Or as shown in fig. 11, referring to fig. 7 and 9, in another embodiment, the flexible member is a brake cable, the second driving unit 420 includes a first nut 423 slidably disposed on the support frame 100, a first screw 424 rotatably disposed on the support frame 100, and a first hand-operated member 425 for driving the first screw 424 to rotate, where the first screw 424 is in driving engagement with the first nut 423, and the telescopic end 402 is disposed on the first nut 423. In this way, the first hand-operated member 425 drives the first screw 424 to rotate, so that the telescopic end 402 can move along with the first nut 423, and pull the brake cable to retract, and further pull the lever 310 to move downwards, the lever 310 resets, the pressure-bearing member 200 also resets, and at this time, the first screw 424 and the first nut 423 can be self-locked, and the elastic member 322 is in a non-reset state. The swing rod 422 drives the first screw 424 to reversely rotate, so that the telescopic end 402 can extend out along with the first nut 423, and the lever 310 can move upwards under the reset force of the elastic piece 322 to jack up the pressure bearing piece 200.

In combination with the above embodiment, when the elastic member 322 is an extension spring, the brake cable is connected to one end of the lever 310 near the pressure-bearing member 200. At this time, the brake cable is released, the elastic member 322 can be reset to enable the lever 310 to move upwards to jack up the pressure-bearing member 200, and the brake cable is pulled to enable the lever 310 to move downwards to enable the elastic member 322 to be in a non-reset state, and the brake cable is locked by the second driving unit 420 to enable the pressure-bearing member 200 and the lever 310 to be in a reset state.

It should be noted that, the specific implementation of the "rotating end" of the second driving unit may be implemented with reference to the reel-up or implemented with a motor and a reduction gearbox.

Of course, in other embodiments, the reset mechanism 400 may be a locking structure, in which the pressure-bearing member 200 or the lever 310 can be locked in the reset state, and in the unlocked state, the pressure-bearing member 200 and the lever 310 can move upwards under the reset force of the elastic member 322. Specifically, the reset mechanism 400 is a pulling piece rotatably disposed on the support frame 100, when the pulling piece rotates to a locked state, the pressure-bearing member 200 can be locked on the support frame 100, and when the pulling piece rotates to an unlocked state, the pressure-bearing member 200 can rotate upwards under the reset force of the elastic member 322, so that the pressure-bearing surface 210 is inclined downwards relative to the access side 110.

Of course, in other embodiments, the lifting mechanism 300 is one of a rack and pinion telescoping mechanism, a lead screw first nut 423 telescoping mechanism, a link telescoping mechanism, or a retractor. In this way, the pushing up of the pressure receiving member 200 can also be realized.

The telescopic device comprises, but is not limited to, a hydraulic rod, a pneumatic rod, a linear motor and other equipment capable of directly providing telescopic power.

In addition, the number of the "lifting mechanisms 300" or the number of the levers in any of the above embodiments is not limited herein, and may be rotated according to actual needs.

In the embodiment, as shown in fig. 7 and 9, at least two levers 310 are arranged at intervals along the length direction of the transfer plate 500, one lever 310 corresponds to one elastic member 322 and one brake cable, and all brake cables are controlled by the same second driving unit 420. In this way, the lever 310 can be controlled simultaneously, and the operation is easy.

It should be noted that, the specific implementation manner of the "transferring device 20" (i.e. the transferring plate 500 and the driving mechanism 600) includes, but is not limited to, a conventional transferring device 20, such as a rack and pinion mechanism driving the transferring plate 500 to reciprocate, or a first screw nut 423 mechanism driving the transferring plate 500 to reciprocate, or a hydraulic rod driving the transferring plate 500 to reciprocate, or a flexible driving mechanism driving the transferring plate 500 to reciprocate.

On the basis of any of the above embodiments, as shown in fig. 13 to 15, in one embodiment, the transfer plate 500 includes a first plate 510, a first flexible sleeve 520, a second plate 530 and a second flexible sleeve 540, the first plate 510 is movably disposed above the pressure-bearing member 200, and the driving mechanism 600 can drive the first plate 510 to reciprocate toward the direction of the inlet side 110, the first flexible sleeve 520 is movably disposed on the first plate 510, and the first flexible sleeve 520 is fixedly disposed on the pressure-bearing member 200, the second plate 530 is fixedly disposed above the first plate 510, the second flexible sleeve 540 is movably disposed on the second plate 530 to form a movable plate surface, and the second flexible sleeve 540 is in friction fit with the first flexible sleeve 520, wherein the transfer device 20 further includes a locking mechanism 700 disposed on the transfer plate 500 for locking the second flexible sleeve 540 and the second plate 530, and when the locking mechanism 700 is released, the first plate 510 can drive the second flexible sleeve 540 to rotate through the first flexible sleeve 520. Thus, when the locking mechanism 700 is released, the driving mechanism 600 drives the first plate 510 to move, so that the first flexible sleeve 520 can rotate by driving the second flexible sleeve 540, a movable plate surface is formed on the second plate 530, the friction force between the patient or the person to be tested and the transfer plate 500 is reduced by rolling, and when the locking mechanism 700 locks the second flexible sleeve 240 and the second plate 530, the second plate 530 and the second flexible sleeve 540 are not rotatable, so that the friction force between the patient or the person to be tested and the transfer plate 500 can be increased.

Specifically, when the transfer plate 500 is required to be inserted into the patient or the person under test, the locking mechanism 700 is released, the driving mechanism 600 drives the first plate 510 and the second plate 530 to move, the first flexible sleeve 520 can rotate by driving the second flexible sleeve 540, so that the transfer plate 500 can be smoothly inserted into the patient or the person under test, and then the second flexible sleeve 540 and the second plate 530 are locked by the locking mechanism 700, so that the second plate 530 and the second flexible sleeve 540 are not rotatable, and further the driving mechanism 600 drives the first plate 510 and the second plate 530 to move reversely, and the friction force of the second flexible sleeve 540 is utilized to drive the patient or the person under test to separate from the curved bed 900 and move towards the transfer cart. If the patient or the person to be tested enters the second flexible sleeve 540, the locking mechanism 700 can be released again, the driving mechanism 600 drives the first plate 510 and the second plate 530 to move, and the first flexible sleeve 520 can be further inserted under the patient or the person to be tested to enable the patient or the person to be tested to enter the transferring plate 500 by driving the second flexible sleeve 540 to rotate, and the locking mechanism 700 is locked to repeat the above actions, so that the patient or the person to be tested can be transferred from the curved bed 900 to the pressure-bearing member 200, namely to the transferring vehicle, and then the patient or the person to be tested can be transferred out of the curved bed 900 by using the transferring vehicle. If applied to scanning equipment, can shift the person under test out of scanning equipment, make things convenient for other person under test to get into scanning equipment and scan.

Specific materials for the "first flexible sleeve 520" and the "second flexible sleeve 540" include, but are not limited to, glue, cloth, etc.

In particular, in this embodiment, the "first flexible sleeve 520" and the "second flexible sleeve 540" are flexible cloth sleeves.

It should be noted that, the "locking mechanism 700" may be implemented by any conventional technology that meets the usage requirement. If the two clamping blocks are used to realize the loosening and clamping of the second flexible sleeve 540 and the second plate 530, the rotation fit control of the first flexible sleeve 520 and the second flexible sleeve 540 is further realized. And the power can be electric control power or manual control power.

Based on the above embodiment, as shown in fig. 13, in an embodiment, the transfer plate 500 further includes a pressing strip 550 and a fastening component 560, where the pressing strip 550 presses the first flexible sleeve 520, and cooperates with the fastening component 560 to press and fix the first flexible sleeve 520 on the pressure bearing member 200. Thus, by using the cooperation of the pressing strip 550 and the fastening component 560, the first flexible sleeve 520 is reliably fixed on the pressure bearing piece 200, so that when the first plate 510 moves, the first flexible sleeve 520 can move, and the first flexible sleeve 520 is convenient to drive the second flexible sleeve 540 to rotate.

The fastening assembly 560 includes, but is not limited to, at least one bolt, at least one catch, or at least one rivet, etc.

On the basis of any of the above embodiments, as shown in fig. 3, in one embodiment, the support frame 100 is provided with a supporting leg 130 and a wheel 140 rotatably disposed on the supporting leg 130. Thus, the wheels 140 are utilized to facilitate movement of the transfer cart, which is beneficial to further reducing labor intensity.

Further, in an embodiment, the transfer cart includes a lifting bracket (not shown), the lifting bracket is provided with supporting legs and wheels rotatably arranged on the supporting legs, and the supporting frame is fixedly arranged on the lifting bracket. Therefore, the supporting legs and the wheels are indirectly arranged on the supporting frame through the lifting support, the transfer trolley is convenient to move, and the height of the supporting surface can be flexibly adjusted.

And/or, in an embodiment, the supporting device 10 further includes two guardrails (not shown), which are disposed at two opposite sides of the pressure bearing member 200 at intervals, and which are detachably or rotatably disposed, so that the transfer plate 500 can be moved out of the pressure bearing member 200. Thus, the patient or the detected person can be reliably limited on the transfer trolley in the moving process of the transfer trolley through the guardrail. The guard rail is removable or rotatable without interfering with the removal of the transfer plate 500 from the pressure bearing member 200.

The specific structure of the guard rail can be realized in the conventional technology, and will not be described in detail herein.

And/or, as shown in fig. 18, in an embodiment, the transferring device 20 further includes a strap 800, two ends of the strap 800 are fixedly disposed on the transferring plate 500 to form a binding portion 810, and at least one end of the strap 800 is detachably connected to the transferring plate 500, or the strap 800 includes a first strap body and a second strap body detachably connected to the first strap body. In this way, the patient or the person to be tested can be bound on the transfer plate 500 by using the binding belt 800, that is, the patient or the person to be tested can be conveniently transferred from the curved bed 900 or the plane bed to the transfer cart, and the patient or the person to be tested can be better fixed in the moving process of the transfer cart.

The specific structure of the strap 800 may be implemented in conventional technology and will not be described in detail herein.

On the basis of any of the above embodiments, as shown in fig. 16, in one embodiment, the driving mechanism 600 includes a flexible transmission member 610 and a driver 620, where the flexible transmission member 610 is fixedly connected to the transfer plate 500, and the driver 620 is configured to drive the transfer plate 500 to reciprocate toward the in-out side 110 through the flexible transmission member 610. In this way, by using the flexible transmission member 610 and the driver 620, flexible transmission is realized, and the change of the inclination angle of the bearing plate can be adapted interchangeably, so that the movement of the transfer plate 500 is more reliable.

Based on the above embodiment, as shown in fig. 16 or 17, in an embodiment, the flexible driving member 610 includes a first driving belt 612 and a second driving belt 614, the driver 620 can drive the transfer plate 500 to move away from the pressure bearing member 200 through the first driving belt 612, and the driver 620 can drive the transfer plate 500 to move toward the pressure bearing member 200 through the second driving belt 614. Thus, one driver 620 may be used to drive the first belt 612 to move the transfer plate 500 away from the pressure bearing member 200, i.e. to move the transfer plate in a direction away from the access side 110, and the other driver 620 may be used to drive the second belt 614 to move the transfer plate 500 toward the pressure bearing member 200, i.e. to move the transfer plate in a direction toward the access side 110. Or the first driving belt 612 is driven to move by the contraction power of the driver 620 to move the transfer plate 500 away from the pressure bearing member 200, i.e. to move in the direction of moving out the in-out side 110, and the second driving belt 614 is driven to move by the extension power of the driver 620 to move the transfer plate 500 toward the pressure bearing member 200, i.e. to move in the direction of moving in the in-out side 110. In this way, the selection can be made as desired.

On the basis of the above embodiment, as shown in fig. 16 and 17, in one embodiment, one end of the first driving belt 612 is fixedly connected with the transfer plate 500, the other end of the first driving belt 612 is fixedly connected with the support frame 100, the driving mechanism 600 includes a first movable pulley 630 and a first fixed pulley 640 which are respectively in transmission fit with the first driving belt 612, the first movable pulley 630 can move relative to the support frame 100, the first fixed pulley 640 is installed on the support frame 100, one end of the second driving belt 614 is fixedly connected with the transfer plate 500, the other end of the second driving belt 614 is fixedly connected with the support frame 100, the driving mechanism 600 includes a second movable pulley 650 and a second fixed pulley 660 which are respectively in transmission fit with the second driving belt 614, the second fixed pulley 660 can move relative to the support frame 100, and the second fixed pulley 660 is installed on the support frame 100 and is respectively spaced on two opposite sides of the pressure-bearing member 200, wherein the driver 620 is used for driving the first movable pulley 630 and the second movable pulley 650 to move. Thus, the first belt 612 and the second belt 614 can move by one driver 620, so as to realize the control of moving out and moving in the transfer plate 500. And because the first driving belt 612 and the second driving belt 614 are flexible members, the movements are not interfered with each other.

Meanwhile, a labor-saving transmission structure is formed by the cooperation of the first transmission belt 612, the first movable pulley 630 and the first fixed pulley 640, and another labor-saving transmission structure is formed by the cooperation of the second transmission belt 614, the second movable pulley 650 and the second fixed pulley 660, so that the power intensity of the driver 620 is reduced. Particularly, the labor intensity can be reduced when the manual driving is performed. And when in electric driving, the cost of the power equipment can be reduced.

Based on the above embodiment, as shown in fig. 16 and 17, in an embodiment, the driving mechanism 600 includes a sliding member 670 slidably connected to the supporting frame 100, the driver 620 is configured to drive the sliding member 670 to move, and the first movable pulley 630 and the second movable pulley 650 are fixedly disposed on the sliding member 670. Thus, when the driver 620 is contracted, the first movable pulley 630 is driven by the sliding member 670 to move, and the first driving belt 612 is driven by the first movable pulley 630 to move, so that the transfer plate 500 moves away from the pressure bearing member 200, i.e. moves in the direction of moving out the in-out side 110, while when the driver 620 is extended, the second movable pulley 650 is driven by the sliding member 670, and the second driving belt 614 is driven by the second movable pulley 650 to move, so that the transfer plate 500 moves towards the direction close to the pressure bearing member 200, i.e. moves in the direction of moving in-out side 110.

Based on the above embodiment, as shown in fig. 16, in one embodiment, the driver 620 includes a second screw 622 rotatably mounted on the support frame 100, one end of the second screw 622 is provided with a second rocking member 624, and the other end of the second screw 622 is rotatably connected with the sliding member 670, and the driver 620 further includes a second nut 626 in screw driving engagement with the second screw 622, where the second nut 626 is fixedly mounted on the support frame 100. In this way, the second hand-operated member 624 can drive the second screw 622 to rotate, and further can drive the sliding member 670 to reciprocate along the axial direction of the second screw 622, so as to realize the movement of the first driving belt 612 and the second driving belt 614. And the second screw 622 is matched with the second nut 626 to realize instant rotation and instant stop, can be self-locked, and is convenient for realizing the reciprocating movement control of the transfer plate 500 through manual operation.

Of course, in other embodiments, as shown in fig. 18, the flexible transmission member 610 is a belt, the corresponding driving mechanism 600 is a belt driving mechanism 600, or the flexible transmission member 610 is a chain, the corresponding driving mechanism 600 is a chain driving mechanism 600, or the flexible transmission member 610 is a track, and the corresponding driving mechanism 600 is a track driving mechanism 600. In this way, the reciprocating movement of the transfer plate 500 can also be achieved by flexible transmission.

Specifically, in one embodiment, the flexible transmission member 610 is a belt, the driver 620 includes a driven pulley of a driving pulley machine engaged with the belt, the driving pulley is rotatably disposed on the support frame 100, the driven pulley is spaced from the driving pulley, and is rotatably disposed on the support frame 100, and the driver 620 further includes a first servomotor for driving the driving pulley to rotate;

Alternatively, in an embodiment, the flexible driving member 610 is a chain, the driver 620 includes a driven sprocket of a driving sprocket wheel in driving engagement with the chain, the driving sprocket wheel is rotatably disposed on the support frame 100, and the driven sprocket wheel is disposed at an interval from the driving sprocket wheel and rotatably disposed on the support frame 100, and the driver 620 further includes a second servo motor for driving the driving sprocket wheel to rotate.

In addition, as shown in fig. 18, in an embodiment, the driving mechanism 600 is disposed in the pressure receiving member 200 and can move with the pressure receiving member 200, and the driving mechanism 600 is offset from the transfer plate 500. In this manner, the drive mechanism 600 moves with the pressure bearing member 200 without interfering with the movement of the pressure bearing member 200, so that the drive mechanism 600 can be selected more.

For example, the driving mechanism 600 is one of a rack and pinion telescopic mechanism, a first screw nut 423 telescopic mechanism, a link telescopic mechanism, or a telescopic device. The telescopic device comprises, but is not limited to, a hydraulic rod, a pneumatic rod, a linear motor and other equipment capable of directly providing telescopic power.

It should be noted that, the "first transmission member 410" may be one part of the module "reset mechanism 400", that is, may be assembled integrally with the other components "of the reset mechanism 400, and then assembled in a modularized manner, or may be independent from the other components" of the reset mechanism 400, and may be separated from the other components "of the reset mechanism 400, that is, may be assembled in a modularized manner in the device.

Equivalently, the components contained in the units, the assemblies, the mechanisms and the devices can be flexibly combined, so that the modular production can be performed according to actual needs, and the modular assembly is convenient. The above-mentioned components are only one embodiment of the present application, and for convenience of reading, not limitation of the scope of protection of the present application, so long as the above components are included and the same function should be understood as the equivalent technical solutions of the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "first," "second," etc. can include at least one such feature, either explicitly or implicitly. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "mounted," "positioned," "secured" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.

Claims (18)

1. The transfer vehicle is characterized by comprising a supporting device and a transfer device;

The supporting device comprises a supporting frame, a pressure-bearing piece and a lifting mechanism, wherein the supporting frame comprises an inlet side and an outlet side, the pressure-bearing piece is movably arranged on the supporting frame and comprises a pressure-bearing surface, and the lifting mechanism is used for jacking the pressure-bearing piece so that the pressure-bearing surface is inclined downwards in the direction of the inlet side and the outlet side;

The transfer device comprises a transfer plate and a driving mechanism, wherein the transfer plate is movably arranged on the pressure bearing piece, and the driving mechanism is used for driving the transfer plate to reciprocate towards the in-out side direction;

Wherein, the transfer plate includes:

the first plate body is movably arranged above the pressure bearing piece, and the driving mechanism can drive the first plate body to reciprocate towards the in-out side direction;

The first flexible sleeve is movably sleeved on the first plate body and fixedly arranged on the pressure-bearing piece;

a second plate fixedly arranged above the first plate, and

The second flexible sleeve is movably sleeved on the second plate body to form a movable plate surface, and the second flexible sleeve is in friction fit with the first flexible sleeve;

the transfer device further comprises a locking mechanism, wherein the locking mechanism is arranged on the transfer plate and used for locking the second flexible sleeve and the second plate body, and when the locking mechanism is released, the first plate body can drive the second flexible sleeve to rotate through the first flexible sleeve.

2. The transfer cart of claim 1, wherein the transfer plate further comprises a bead and a fastening assembly, the bead abutting the first flexible sleeve and cooperating with the fastening assembly to press the first flexible sleeve against the pressure bearing member.

3. The transfer cart of claim 1, wherein the support frame is provided with support legs and wheels rotatably arranged on the support legs, and/or the support device further comprises two guardrails, wherein the two guardrails are arranged on two opposite sides of the pressure-bearing piece at intervals, and the guardrails are detachably or rotatably arranged so that the transfer plate can be moved out of the pressure-bearing piece, and/or the transfer device further comprises a binding belt, two ends of the binding belt are fixedly arranged on the transfer plate to form binding parts, and at least one end of the binding belt is detachably connected with the transfer plate, or the binding belt comprises a first belt body and a second belt body detachably connected with the first belt body.

4. A transfer cart according to any one of claims 1 to 3, wherein the driving mechanism comprises a flexible transmission member and a driver, the flexible transmission member is fixedly connected with the transfer plate, and the driver is used for driving the transfer plate to reciprocate in the in-out side direction through the flexible transmission member.

5. The transfer cart of claim 4, wherein the flexible transmission member comprises a first transmission belt and a second transmission belt, the driver can drive the transfer plate to move away from the pressure-bearing member through the first transmission belt, and the driver can drive the transfer plate to move towards a direction close to the pressure-bearing member through the second transmission belt.

6. The transfer cart of claim 5, wherein one end of the first transmission belt is fixedly connected with the transfer plate, the other end of the first transmission belt is fixedly connected with the support frame, the driving mechanism comprises a first movable pulley and a first fixed pulley which are respectively in transmission fit with the first transmission belt, the first movable pulley can move relative to the support frame, the first fixed pulley is arranged on the support frame, one end of the second transmission belt is fixedly connected with the transfer plate, the other end of the second transmission belt is fixedly connected with the support frame, the driving mechanism comprises a second movable pulley and a second fixed pulley which are respectively in transmission fit with the second transmission belt, the second movable pulley can move relative to the support frame, and the second fixed pulley is arranged on the support frame and is respectively arranged on two opposite sides of the pressure-bearing piece at intervals;

The driver is used for driving the first movable pulley and the second movable pulley to move.

7. The transfer cart of claim 6, wherein the driving mechanism comprises a sliding member slidably connected to the supporting frame, the driver is configured to drive the sliding member to move, and the first movable pulley and the second movable pulley are fixedly disposed on the sliding member.

8. The transfer cart of claim 7, wherein the driver comprises a second screw rotatably mounted on the support frame, a second hand-shaking member is arranged at one end of the second screw, the other end of the second screw is rotatably connected with the sliding member, the driver further comprises a second nut in screw transmission fit with the second screw, and the second nut is fixedly arranged on the support frame.

9. The transfer cart of claim 4, wherein the flexible transmission member is a belt and the corresponding drive mechanism is a belt drive mechanism, or wherein the flexible transmission member is a chain and the corresponding drive mechanism is a chain drive mechanism, or wherein the flexible transmission member is a track and the corresponding drive mechanism is a track drive mechanism.

10. A transfer car according to any one of claims 1 to 3, wherein the drive mechanism is disposed in the pressure member and is movable therewith, and the drive mechanism is offset from the transfer plate.

11. The transfer cart of claim 1, wherein the pressure-bearing member is rotatably connected to the support frame, and the support frame is provided with a stopper portion for supporting the pressure-bearing member.

12. The transfer cart of claim 1, wherein the lifting mechanism comprises a lever and a first driving unit, the lever is rotatably arranged in the supporting frame, one end of the lever abuts against the bottom wall of the pressure-bearing member, and the first driving unit is used for driving the lever to rotate so as to jack up the pressure-bearing member.

13. The transfer cart of claim 12, wherein the first driving unit includes an elastic member, one end of the elastic member is connected to the supporting frame, and the other end of the elastic member is connected to the other end of the lever, so that the lever can jack up the pressure bearing member when the elastic member is reset.

14. The transfer cart of claim 13, wherein the support apparatus further comprises a return mechanism for returning the pressure bearing member or returning the lever such that the elastic member is compressed or stretched.

15. The transfer cart of claim 14, wherein the reset mechanism comprises a first transmission member and a second driving unit capable of self-locking, one end of the first transmission member is connected with the lever or the pressure-bearing member, and the second driving unit drives the pressure-bearing member to reset or the lever to reset through the first transmission member, so that the elastic member is compressed or stretched.

16. The transfer cart of claim 15, wherein the first transmission member is a flexible member, the second drive unit includes a telescoping end fixedly coupled to the flexible member, or the second drive unit includes a rotating end fixedly coupled to the flexible member.

17. The transfer cart of claim 16, wherein the flexible member is a brake cable, the second driving unit comprises a connecting rod assembly arranged on the supporting frame and a swing rod driving the connecting rod assembly to move, the connecting rod assembly can be self-locked, and the connecting rod assembly is provided with the telescopic end;

Or the second driving unit comprises a first nut which is slidably arranged on the supporting frame, a first screw rod which is rotatably arranged on the supporting frame and a first hand-operated piece which drives the first screw rod to rotate, the first screw rod is in transmission fit with the first nut, and the telescopic end is arranged on the first nut.

18. The transfer cart of claim 1, wherein the lifting mechanism is one of a rack and pinion telescoping mechanism, a lead screw first nut telescoping mechanism, a link telescoping mechanism, or a retractor.