CN115590697A - Medical turning-over bed - Google Patents

Abstract

The invention relates to a turn-over bed, in particular to a medical turn-over bed. The medical turn-over bed provided by the invention can protect a patient, increase the safety of the patient and prevent the patient from falling down in the turn-over process. The invention provides a medical turning-over bed which comprises a bed frame, a support plate, a hinge, a cylinder, a first fixing block, a connecting shaft, a connecting frame and the like; the bed frame is characterized in that support plates are symmetrically arranged on the upper portion of the bed frame in a front-back mode, the support plate on the front side is fixedly connected with the bed frame, two hinges are connected between the support plate on the rear side and the support plate on the front side, a first fixing block is connected to the front side of the bottom of the support plate on the rear side, an air cylinder for power output is installed on the rear side of the lower portion of the bed frame, and a connecting shaft is connected to a telescopic piece of the air cylinder. Can make the extension board at rear drive the patient upset through the cylinder drive to this makes the patient stand up, and the effect that resets through first spring makes the guard plate rise and protects the patient, with this in-process that can stand up at the patient avoids the patient to drop.

Description

A medical turning bed

technical field

The invention relates to a turning bed, in particular to a medical turning bed.

Background technique

Bed sores, modern medicine called pressure sores, also known as pressure ulcers, are a phenomenon of tissue ulceration and necrosis caused by prolonged illness and long-term pressure on local tissues. In order to prevent and treat decubitus ulcers, the first method is to turn the patient more often to avoid long-term bed rest and local long-term pressure, and it is also necessary to treat the sick part of the patient in time. Since the majority of decubitus patients are unable to exercise themselves and are bedridden patients for a long time, it is necessary for medical staff or family members to assist the patient to turn over. This operation is cumbersome and laborious. In the prior art, there are various structural types It is a roll-over bed, but it is inconvenient to use and has low usability.

For example, the patent authorization publication number is CN210843905U, and the announcement date is a kind of medical turn over bed of 20200626, comprising the main body, the adjustment mechanism at the top of the main body and the anti-slip mechanism in the middle of the main body, the adjustment mechanism includes a table, and the middle of the main body is fixedly connected with The bed board, the table board is located in the middle of the top of the bed board, the bottom ends of both sides of the table board are fixedly connected with table legs, the middle of the two sides of the bed board is provided with a reset chute, and the middle of one side of the table leg corresponds to The position of the reset chute is fixedly connected with a pulley, and the side of the table leg away from the pulley is fixedly connected with a limit bolt. When the medical turning bed is in use, it is raised to the top by the electric lifting rod, and then with the turning of the turning plate, the patient can turn over with the help of the turning bed. Although this method can make the patient turn over, because the front and rear sides of the bed board are not It is equipped with protection, and it is easy to fall under the bed when the patient is turned over, which poses a safety hazard.

According to the shortcomings in the above-mentioned prior art, a kind of medical turning over that can overcome the shortcomings of the prior art and can protect the patient, increase the patient's sense of security, and prevent the patient from falling in the process of turning over is hereby designed. bed.

Contents of the invention

In order to overcome the disadvantages of the prior art that are not equipped with protection, and the patient is easy to fall under the bed when the patient turns over, there are potential safety hazards, the technical problem to be solved by the present invention is to provide a protective device for the patient, increasing A sense of security, a medical turning bed that prevents patients from falling during turning over.

In order to solve the above technical problems, the present invention provides such a medical turning bed, which includes a bed frame, a support plate, a hinge, a cylinder, a first fixed block, a connecting shaft, a connecting frame, a protective mechanism and a locking mechanism, and the bed frame The upper part of the front and back is symmetrically provided with a support plate, the front support plate is fixedly connected with the bed frame, two hinges are connected between the rear support plate and the front support plate, and the bottom of the rear support plate is connected to the front side. There is a first fixed block, and a cylinder for power output is installed on the rear side of the lower part of the bed frame. A connecting shaft is connected to the telescopic part of the cylinder, and a connecting frame is rotatably provided between the connecting shaft and the first fixed block. There is a protective mechanism for securing the patient and a catch mechanism for retracting the protective mechanism.

Preferably, the bed frame is made of aluminum alloy.

Preferably, the protective mechanism includes a protective plate, a sliding shaft, a first handle, a second fixed block and a first spring, and the upper front side of the bed frame is symmetrically connected with the second fixed block, and the two second fixed blocks are connected with the bed frame A protective plate is slidingly provided between the protective plate and the two second fixed blocks are connected with a first spring, and the front side of the protective plate is symmetrically connected with a sliding shaft that slides through the bed frame. A first handle for grasping is attached to the upper front side.

Preferably, the clamping mechanism includes a fixed frame, a first wedge block, a second spring, a second handle and a connecting plate, and the left and right sides of the middle part of the bed frame are symmetrically connected with the fixed frames, and the upper parts of the two fixed frames are sliding There is a first wedge-shaped block for clamping the protective plate, and the two first wedge-shaped blocks are in contact with the protective plate. The second spring on the outside of the first wedge-shaped block is connected with a connecting plate between the front sides of the two first wedge-shaped blocks, and the middle front side of the connecting plate is connected with the second handle.

Preferably, it also includes a tripping mechanism for fast protection. The tripping mechanism includes a wedge plate, a sliding rod, a third spring and a third fixed block. The upper front inner wall of the bed frame is connected with a third fixed block. The lower part of the fixed block slides through a sliding rod used to push the connecting plate. The sliding rod is in contact with the connecting plate. A third spring wound on the outside of the sliding rod is connected between the sliding rod and the third fixed block. A wedge-shaped plate for pushing the sliding rod is sheathed, and the wedge-shaped plate is in contact with the sliding rod.

Preferably, it also includes a protective mechanism for protecting the patient. The protective mechanism includes a mounting plate and a protective pad, the upper rear side of the bed frame is connected to the mounting plate, and the front side of the mounting plate is connected to the protective pad.

Preferably, it also includes a resisting mechanism for ensuring that the patient turns over successfully. The resisting mechanism includes a resisting pad, a first guide rod, a fourth spring, a third handle, a second wedge block, an elastic member and a second guide rod , the middle part of the protective plate is symmetrically opened with a chute, the upper part of the bed frame slides through two symmetrically arranged first guide rods, and the first guide rods on the left and right sides slide through the left and right sides respectively the chute, the back side of the two first guide rods is connected with a cushion for resisting the patient, the front side of the two first guide rods is connected with a third handle, and the third handle is connected to the bed frame. Two fourth springs are connected between the two fourth springs, and the two fourth springs are respectively wound on the outside of the two first guide rods. The upper front side of the bed frame is connected with the second guide rod below the two first guide rods. The upper sliding type sleeve of the two guide rods is provided with a second wedge block for blocking the third handle. The elastic member on the outside of the second guide rod.

Preferably, it also includes a push-out mechanism for automatically resisting the patient, the push-out mechanism includes a guide sleeve and a stay rope, the upper front side of the bed frame is connected with a guide sleeve surrounding the second guide rod, the second wedge block and the second Two pull cords that slide through the guide sleeve and the connecting plate are connected between the handles.

The effect that the present invention has reached, the present invention passes.

On the basis of overcoming the shortcomings of the prior art, the present invention also has the beneficial effects of:

1. Through the drive of the cylinder, the rear support plate can drive the patient to turn over, so as to make the patient turn over, and the protective plate rises to protect the patient through the action of the first spring reset, so as to prevent the patient from falling during the turning over process of the patient .

2. When the expansion part on the cylinder is stretched out, it will drive the wedge-shaped plate to move upwards and squeeze the sliding rod, so as to automatically protect the patient during the process of turning the patient over, so that the operator can not manually open the protective plate, which increases the fault tolerance rate, to further avoid the phenomenon of patients accidentally falling.

3. The protective pad can protect the patient, thereby preventing the patient from being hurt by bumps, and at the same time making the patient more comfortable, thereby alleviating the patient's mood.

4. In the process of turning over the patient, the second handle moves forward and the second wedge moves forward through the pull cord to release the third handle, the fourth spring resets, and the third handle will be reset by the fourth spring The pad is driven forward by the first guide rod to move against the patient, so that the patient can be prevented from sliding down from the rear support plate, thereby avoiding invalid turning over.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the first part of the present invention.

Fig. 3 is a schematic diagram of the second part of the three-dimensional structure of the present invention.

Fig. 4 is a partial sectional view of the protection mechanism of the present invention.

Fig. 5 is a schematic perspective view of the clamping mechanism of the present invention.

Fig. 6 is a schematic perspective view of the three-dimensional structure of the tripping mechanism of the present invention.

Fig. 7 is a three-dimensional structural schematic diagram of the protection mechanism of the present invention.

Fig. 8 is a schematic diagram of the first three-dimensional structure of the resisting mechanism of the present invention.

Fig. 9 is a second perspective structural schematic view of the resisting mechanism of the present invention.

Fig. 10 is a schematic perspective view of the push-out mechanism of the present invention.

The marks in the accompanying drawings are: 1-bed frame, 2-support plate, 3-hinge, 4-cylinder, 5-first fixed block, 6-connecting shaft, 7-connecting frame, 8-protection mechanism, 81- Protective plate, 82-sliding shaft, 83-first handle, 84-second fixed block, 85-first spring, 9-clamping mechanism, 91-fixed frame, 92-first wedge block, 93-second spring, 94-second handle, 95-connecting plate, 10-tripping mechanism, 101-wedge plate, 102-sliding rod, 103-the third spring, 104-the third fixed block, 11-protection mechanism, 111-installation plate, 112-protective pad, 12-resist mechanism, 121-resist pad, 122-first guide rod, 123-fourth spring, 124-third handle, 125-second wedge block, 126-elastic part, 127- The second guide rod, 13-propelling mechanism, 131-guide sleeve, 132-stay cord.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Example 1

A medical turning bed, as shown in Figure 1-3, includes a bed frame 1, a support plate 2, a hinge 3, a cylinder 4, a first fixed block 5, a connecting shaft 6, a connecting frame 7, a protective mechanism 8 and a card Housing mechanism 9, the upper part of the bed frame 1 is symmetrically provided with support plates 2. The material of the bed frame 1 is aluminum alloy, which is lighter in weight and harder in strength. Two hinges 3 are connected between the support plate 2 on the front side and the support plate 2 on the front side, the bottom front side of the rear side support plate 2 is bolted with the first fixing block 5, and the lower rear side of the bed frame 1 is connected by screws. A cylinder 4 is installed in the air cylinder 4, and the telescopic part of the cylinder 4 is connected with a connecting shaft 6, and a connecting frame 7 is rotatably provided between the connecting shaft 6 and the first fixed block 5, and the bed frame 1 is provided with a protective mechanism 8 and a clamping mechanism. 9.

As shown in Figure 4, the protective mechanism 8 includes a protective plate 81, a sliding shaft 82, a first handle 83, a second fixed block 84 and a first spring 85, and the upper front side of the bed frame 1 is bolted with a second fixed Block 84, between two second fixed blocks 84 and the bed frame 1 slide type is provided with protective plate 81, is all connected with first spring 85 between protective plate 81 and two second fixed blocks 84, the front of protective plate 81 A sliding shaft 82 that slides through the bed frame 1 is bolted symmetrically to the left and right sides, and a first handle 83 is connected to the upper front side of the protective plate 81 .

As shown in Figure 5, the clamping mechanism 9 includes a fixed frame 91, a first wedge block 92, a second spring 93, a second handle 94 and a connecting plate 95, and the left and right sides of the middle part of the bed frame 1 are symmetrically bolted with fixed frame 91, the top of the two fixed frames 91 slides through the first wedge-shaped block 92, and the two first wedge-shaped blocks 92 are all in contact with the protective plate 81, and the first wedge-shaped blocks 92 on the left and right sides are connected with the left and right sides respectively. Two second springs 93 wound around the outside of the first wedge-shaped block 92 are connected between the fixed mounts 91, and a connecting plate 95 is welded between the front sides of the two first wedge-shaped blocks 92, and the middle front side of the connecting plate 95 is welded. There is a second handle 94.

First of all, the patient can lie on the rear support plate 2 for rest or treatment. When the operator needs to turn the patient over, the initial first wedge block 92 blocks the protective plate 81, and the first spring 85 is in a compressed state. The second handle 94 drives the connecting plate 95 to move forward, and the connecting plate 95 will drive the first wedge-shaped block 92 to move forward, the second spring 93 will compress, and the first wedge-shaped block 92 will loosen the protective plate 81 when moving forward, and the first spring will 85 is reset, the protective plate 81 will move upwards under the reset action of the first spring 85 and drive the sliding shaft 82 to move upwards, and the upward movement of the protective plate 81 can enclose the patient who needs to turn over, so as to prevent the patient from turning over drop, the operator releases the second handle 94 again, the second spring 93 resets, and the first wedge-shaped block 92 will move backward and reset under the action of the second spring 93 reset and drive the second handle 94 backward through the connecting plate 95 Then the operator starts the cylinder 4 to extend the telescopic piece on the cylinder 4. The telescopic piece on the cylinder 4 will drive the connecting frame 7 to move upward through the connecting shaft 6, and the connecting frame 7 will drive the rear through the first fixed block 5. The support plate 2 rotates with the hinge 3 as the hinge point, and the rear support plate 2 will drive the patient to rotate, and the operator will support the patient to help the patient turn over. After the patient turns over, the operator will start the cylinder 4 again , so that the telescopic piece on the cylinder 4 shrinks, the telescopic piece on the cylinder 4 will drive the connecting frame 7 to move downward through the connecting shaft 6, and the connecting frame 7 will drive the rear support plate 2 to the hinge 3 through the first fixed block 5 Reverse rotation is performed for the hinge point, so that the rear support plate 2 can be reset. After the rear support plate 2 is reset, the operator closes the cylinder 4 again. When the operator needs to retract the protective plate 81, the operator can The first handle 83 drives the protective plate 81 to move downward, the first spring 85 is compressed, the downward movement of the protective plate 81 will drive the sliding shaft 82 to move downward, and the downward movement of the protective plate 81 will also squeeze the first wedge block 92 forward Move, the second spring 93 is compressed, and the protective plate 81 continues to move downwards to release the first wedge-shaped block 92, and the second spring 93 resets, and the first wedge-shaped block 92 will move backward again under the reset effect of the second spring 93. The guard plate 81 is stuck, whereby the next guarding operation can be prepared.

Example 2

On the basis of Embodiment 1, as shown in Figures 1 and 6, a tripping mechanism 10 is also included, and the tripping mechanism 10 includes a wedge plate 101, a sliding rod 102, a third spring 103 and a third fixing block 104 , the upper front inner wall of the bed frame 1 is bolted with a third fixed block 104, the lower part of the third fixed block 104 slides through a sliding rod 102, the sliding rod 102 contacts with the connecting plate 95, the sliding rod 102 and the third fixed block 104 A third spring 103 wound around the outside of the sliding rod 102 is connected between them, and a wedge plate 101 is sleeved on the telescoping part of the cylinder 4 , and the wedge plate 101 is in contact with the sliding rod 102 .

When the telescopic piece on the cylinder 4 stretches out, the telescopic piece on the cylinder 4 will drive the wedge-shaped plate 101 to move upwards, and the upward movement of the wedge-shaped plate 101 will squeeze the sliding rod 102 to move forward, and the third spring 103 will compress, and the sliding rod 102 will move forward. The front movement will push the connecting plate 95 to move forward, so that the first wedge block 92 can be automatically released from the protective plate 81 during the rotation of the rear support plate 2, thereby automatically protecting the patient during the process of turning the patient over. , so that the protective plate 81 can be opened manually without the operator, and then when the telescopic piece on the cylinder 4 is retracted, the telescopic piece on the cylinder 4 will drive the wedge plate 101 to move downward to release the sliding rod 102, and the third spring 103 Reset, the sliding rod 102 will move backward under the reset action of the third spring 103 to loosen the connecting plate 95, so as to prepare for the next automatic protection operation.

Example 3

On the basis of Embodiment 2, as shown in Figure 1 and Figure 7, it also includes a protection mechanism 11, the protection mechanism 11 includes a mounting plate 111 and a protection pad 112, and the rear side of the upper part of the bed frame 1 is bolted to the mounting plate 111 , The front side of the mounting plate 111 is connected with a protection pad 112, and the material of the protection pad 112 is an inflatable rubber material.

When the patient is lying on the support board 2 at the back, the protective pad 112 can protect the patient, thereby preventing the patient from being hurt by bumps.

Example 4

On the basis of Embodiment 3, as shown in Fig. 1, Fig. 8 and Fig. 9, a resisting mechanism 12 is also included, and the resisting mechanism 12 includes a resisting pad 121, a first guide rod 122, and a fourth spring 123 , the third handle 124, the second wedge block 125, the elastic member 126 and the second guide rod 127, the middle part of the protective plate 81 is symmetrically opened with a chute, and the upper sliding type of the bed frame 1 runs through two symmetrically The first guide rods 122 provided, the first guide rods 122 on the left and right sides respectively slide through the chute on the left and right sides, and the rear sides of the two first guide rods 122 are bolted with a pad 121, and the two first guide rods 122 A third handle 124 is bolted between the front sides of the first guide rods 122, and two fourth springs 123 are connected between the third handle 124 and the bed frame 1, and the two fourth springs 123 are respectively wound on two The outer side of the first guide rod 122, the upper front side of the bed frame 1 is welded with the second guide rod 127 located below the two first guide rods 122, and the upper part of the second guide rod 127 is sleeved with a second wedge block 125 , the second wedge block 125 is in contact with the third handle 124 and prevents the third handle 124 from moving backward. Part 126, the elastic part 126 is a rubber spring or an air spring.

As shown in Fig. 1 and Fig. 10, push-out mechanism 13 is also included, and push-out mechanism 13 includes guide sleeve 131 and stay cord 132, and the upper front side of bedstead 1 is bolted with guide sleeve 131 surrounding second guide rod 127 , There are two pull cords 132 slidingly penetrating through the guide sleeve 131 and the connecting plate 95 between the second wedge block 125 and the second handle 94 .

The first second wedge block 125 blocks the third handle 124, and the fourth spring 123 is in a stretched state. During the process of turning over the patient, the connecting plate 95 moves forward and pulls the stay cord 132 through the second handle 94, and the stay cord 132 The second wedge-shaped block 125 will be pulled to move downward, the elastic member 126 will be compressed, the second wedge-shaped block 125 will be moved downward to release the third handle 124, and the fourth spring 123 will reset, and the third handle 124 will be reset by the fourth spring 123. Under the action, the first guide rod 122 drives the pad 121 to move backward, and the pad 121 moves backward against the patient, so that the patient can be prevented from sliding down from the rear support plate 2 during the patient's turning over process. , the patient will press against the pad 121 to move forward in the process of continuing to turn over, and the pad 121 will drive the third handle 124 to move forward through the first guide rod 122, and the fourth spring 123 will stretch. The third handle 124 can be pulled, and when the rear support plate 2 reversely rotates back, the connecting plate 95 will move backwards to drive the second handle 94 to release the stay cord 132, and the stay cord 132 will release the second wedge-shaped block 125, When the elastic member 126 is reset, the second wedge block 125 will move upwards under the action of the elastic member 126 to reset and block the third handle 124 again, so that the operation of automatically resisting the patient can be completed.

The above-mentioned embodiments only express the preferred implementation of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make several modifications, improvements and substitutions without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (8)

1. The utility model provides a medical bed that stands up, including bedstead (1), extension board (2), hinge (3), cylinder (4), first fixed block (5), connecting axle (6) and link (7), symmetrical formula is provided with extension board (2) around the upper portion of bedstead (1), extension board (2) and bedstead (1) rigid coupling of front side, be connected with two hinge (3) between extension board (2) and the extension board (2) of front side of rear side, the bottom front side of rear side extension board (2) is connected with first fixed block (5), cylinder (4) that are used for power take off are installed to the lower part rear side of bedstead (1), be connected with connecting axle (6) on the extensible member of cylinder (4), the rotary type is equipped with link (7) between connecting axle (6) and first fixed block (5), a serial communication port, the bedstead still includes protection machanism (8) and blocks mechanism (9), be provided with on bedstead (1) and be used for protecting the patient's protection machanism (8) and be used for packing up blocking mechanism (9) that protection machanism (8).

2. The medical turn-over bed as claimed in claim 1, wherein the bed frame (1) is made of aluminum alloy.

3. The medical turn-over bed as claimed in claim 2, wherein the protection mechanism (8) comprises a protection plate (81), a sliding shaft (82), a first handle (83), a second fixing block (84) and a first spring (85), the second fixing block (84) is connected to the front side of the upper portion of the bed frame (1) in a bilateral symmetry manner, the protection plate (81) is slidably arranged between the two second fixing blocks (84) and the bed frame (1), the first spring (85) is connected between the protection plate (81) and the two second fixing blocks (84), the sliding shaft (82) slidably penetrating through the bed frame (1) is connected to the front side of the protection plate (81) in a bilateral symmetry manner, and the first handle (83) for grasping is connected to the front side of the upper portion of the protection plate (81).

4. The medical turn-over bed as claimed in claim 3, wherein the clamping mechanism (9) comprises fixing frames (91), first wedge-shaped blocks (92), second springs (93), second handles (94) and connecting plates (95), the fixing frames (91) are symmetrically connected to the left and right sides of the middle of the bed frame (1), first wedge-shaped blocks (92) used for clamping the protection plates (81) penetrate through the upper portions of the two fixing frames (91) in a sliding mode, the two first wedge-shaped blocks (92) are in contact with the protection plates (81), two second springs (93) arranged on the outer sides of the first wedge-shaped blocks (92) are connected between the first wedge-shaped blocks (92) on the left side and the first wedge-shaped blocks on the right side and the fixing frames (91) on the left side and the right side respectively, the connecting plates (95) are connected between the front sides of the two first wedge-shaped blocks (92), and the second handles (94) are connected to the front sides of the middle of the connecting plates (95).

5. The medical turn-over bed according to claim 4, further comprising a tripping mechanism (10) for rapid protection, wherein the tripping mechanism (10) comprises a wedge plate (101), a sliding rod (102), a third spring (103) and a third fixing block (104), the third fixing block (104) is connected to the front inner wall of the upper portion of the bed frame (1), the sliding rod (102) for pushing the connecting plate (95) penetrates through the lower portion of the third fixing block (104) in a sliding manner, the sliding rod (102) is in contact with the connecting plate (95), the third spring (103) wound around the outer side of the sliding rod (102) is connected between the sliding rod (102) and the third fixing block (104), the wedge plate (101) for pushing the sliding rod (102) is sleeved on the telescopic part of the air cylinder (4), and the wedge plate (101) is in contact with the sliding rod (102).

6. The medical turn-over bed as claimed in claim 5, further comprising a protection mechanism (11) for protecting the patient, wherein the protection mechanism (11) comprises a mounting plate (111) and a protection pad (112), the mounting plate (111) is connected to the rear side of the upper part of the bed frame (1), and the protection pad (112) is connected to the front side of the mounting plate (111).

7. The medical turn-over bed as claimed in claim 6, further comprising a support mechanism (12) for ensuring successful turn-over of the patient, wherein the support mechanism (12) comprises a support pad (121), a first guide rod (122), a fourth spring (123), a third handle (124), a second wedge-shaped block (125), an elastic member (126) and a second guide rod (127), sliding grooves are formed in the middle of the protection plate (81) in a bilateral symmetry manner, two first guide rods (122) arranged in a bilateral symmetry manner are slidably penetrated through the upper portion of the bed frame (1), the first guide rods (122) arranged in a bilateral symmetry manner are respectively slidably penetrated through the sliding grooves in the left and right sides, the support pad (121) for supporting the patient is connected between the rear sides of the two first guide rods (122), the third handle (124) is connected between the front sides of the two first guide rods (122), two fourth springs (123) are connected between the third handle (124) and the bed frame (1), the two fourth springs (123) are respectively wound around the outer sides of the two first guide rods (122), the upper portion of the second guide rod (125) positioned below the bed frame (127), the second guide rod (124) is in contact with the second wedge-shaped block (127), the second guide rod (124), two elastic pieces (126) wound on the outer side of the second guide rod (127) are connected between the second wedge-shaped block (125) and the second guide rod (127).

8. The medical turn-over bed as claimed in claim 7, further comprising a push-out mechanism (13) for automatically propping against the patient, wherein the push-out mechanism (13) comprises a guide sleeve (131) and a pull rope (132), the guide sleeve (131) surrounding the second guide rod (127) is connected to the front side of the upper portion of the bed frame (1), and two pull ropes (132) slidably penetrating through the guide sleeve (131) and the connecting plate (95) are connected between the second wedge-shaped block (125) and the second handle (94).

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