CN211883945U - A power device for changing the direction of operation to prevent misoperation - Google Patents

Abstract

A change of direction surgical power device to prevent mis-operation, comprising: a handle; the cutter comprises a cutter bar and a cutter head, the rear end of the cutter bar is connected with the handle, and the front end of the cutter bar is connected with the rear end of the cutter head; the tool bit direction changing device comprises a traction piece and an unlocking sleeve, the traction piece is sleeved on the tool bar and can axially move and rotate relative to the tool bar, the front end of the traction piece is connected with the tool bit, the rear end of the traction piece extends into the handle, the unlocking sleeve is arranged on the handle and is fixedly connected with the rear end of the traction piece, and the traction driving mechanism is arranged on the handle; and when the unlocking threaded sleeve rotates to the unlocking position, the positioning mechanism limits the unlocking sleeve to rotate and allows the unlocking sleeve to axially move. The utility model discloses a prevent diversion operation power device of maloperation prevents doctor's maloperation when locking and unblock state, and the security is higher.

Description

A power device for changing the direction of operation to prevent misoperation

technical field

The utility model relates to the technical field of medical instruments, in particular to a power device for changing directions for preventing misoperation.

Background technique

In some orthopedic operations, it is sometimes necessary to use a knife to excise the tissue in the patient's body. The knife usually includes a knife shank and a knife head, and the commonly used knife heads include planing heads, grinding heads or rotary cutting heads. The earliest cutter head can not be bent, the working area is small, and it can adapt to few types of surgery. In order to solve the above-mentioned defects, there are knives with a bendable cutter head, but the bending angle of the cutter head cannot be adjusted, and there is still the defect of a narrow adaptable range. In order to overcome this defect, a tool with adjustable bending angle of the cutter head has appeared. This kind of cutter includes a handle, a cutter bar, a cutter head and a cutter head direction changing device. The rear end of the cutter bar is connected with the handle, and the front end of the cutter bar is connected to The rear end of the cutter head is connected by a rotating connection mechanism, and the cutter head direction changing device is used to drive the cutter head to rotate around the rotation axis. However, the existing cutter head direction changing device has no locking structure, and the doctor is prone to misoperation.

Utility model content

In view of the above-mentioned current state of the prior art, the present invention provides a power device for changing the direction of operation that can prevent misoperation, prevents misoperation by physicians in the locked and unlocked states, and has higher safety.

In order to solve the above technical problems, the utility model provides a power device for changing the direction of operation to prevent misoperation, comprising: a handle; , the front end of the cutter bar is connected with the rear end of the cutter head; the cutter head direction changing device includes a pulling member, the pulling member can move axially relative to the cutter bar, and the pulling member The front end of the cutter head is connected to the cutter head; the cutter head direction changing device also includes an unlocking sleeve and a positioning mechanism, and the unlocking sleeve is fixedly connected to the rear end of the pulling member for driving the pulling member to unlock The positioning mechanism is arranged between the unlocking sleeve and the handle; when the pulling member is in the locking position, the positioning mechanism restricts the unlocking sleeve shaft When the pulling member rotates to the unlocking position, the positioning mechanism restricts the rotation of the unlocking sleeve and allows the unlocking sleeve to move axially.

Because of the positioning mechanism arranged between the unlocking sleeve and the handle, the positioning mechanism restricts the axial movement of the unlocking sleeve and allows the unlocking sleeve to rotate when the pulling member is in the locking position. , When the unlocking sleeve rotates to the unlocking position, the positioning mechanism restricts the rotation of the unlocking sleeve and allows the unlocking sleeve to move axially, thereby preventing the doctor from misoperation in the locked and unlocked state, and the safety is higher.

In one of the embodiments, the handle includes a tube seat located at the rear side of the unlocking sleeve, the rear end of the unlocking sleeve is plug-fitted with the front end of the tube seat, and the positioning mechanism includes a tube seat disposed on the unlocking sleeve. A locking boss on the rear end of the sleeve or the front end of the tube seat and a groove on the front end of the tube seat or the rear end of the unlocking sleeve that cooperates with the locking boss, the groove The channel includes a circumferential channel extending in the circumferential direction and an axial channel extending in the axial direction and communicating with one end of the spiral channel; when the pulling member is in the locking position, the locking The boss is located in the rotation channel, and when the pulling member is rotated to the unlocking position, the locking boss is located in the axial channel.

In one of the embodiments, the channel includes two axial channels, and the two axial channels are respectively communicated with two ends of the rotational channel.

In one of the embodiments, the included angle between the two axial grooves is a right angle.

In one embodiment, a status indication symbol is provided on the outer peripheral surface of the front end of the unlocking sleeve, and a locking state identification symbol and an unlocking state identification symbol are provided on the outer peripheral surface of the socket; When the unlocking sleeve is rotated to the unlocking position, the state indicating symbol is opposite to the locking state identifying symbol, and when the unlocking sleeve is rotated to the unlocking position, the state indicating symbol is opposite to the unlocking state identifying symbol.

In one embodiment, the central hole of the unlocking sleeve is a stepped hole, the unlocking sleeve includes a small hole section with a smaller central hole and a large hole section with a larger central hole, the small hole section and the pull The pulling member is fixedly connected, the large hole section is sleeved on the guide screw head and threadedly matched with the guide screw head, and the guide screw head is in clearance fit with the pulling member.

In one of the embodiments, the handle includes a fixing sleeve located on the front side of the unlocking sleeve, and the cutter head direction changing device further includes a pulling driving mechanism, and the pulling driving mechanism includes an adjusting screw sleeve and an elastic member, The adjusting screw sleeve is arranged on the rear end of the fixing sleeve and is threadedly matched with the rear end of the fixing sleeve, and the elastic member is arranged between the rear end of the unlocking sleeve and the handle for driving The unlocking sleeve moves forward.

In one embodiment, the cutter head direction changing device further comprises an instrument tube and a steering head, the instrument tube is sleeved on the outside of the cutter bar, and the rear end of the instrument tube is fixed on the handle , the steering head is sleeved on the outside of the cutter head, and the rear end of the steering head and the front end of the instrument tube are rotatably connected around the rotation axis, and the front end of the pulling member is provided with a first A connecting part, a second connecting part matched with the first connecting part is provided at the rear end of the steering head on one side of the rotation axis, and the front end of the pulling member passes through the rear end of the steering head The first connection part and the second connection part are connected.

In one embodiment, a locking mechanism is provided between the front end of the pulling member and the rear end of the steering head, and when the pulling member is in the unlocking position, the locking mechanism allows the steering The head rotates about the axis of rotation, and the locking mechanism restricts the rotation of the steering head about the axis of rotation when the pulling member is in the locked position.

In one embodiment, the locking mechanism includes a lug extending axially forward from the front end face of the pulling member, and when the pulling member is rotated to the unlocked position, the lug is located at On the rotation axis, when the pulling member rotates to the locking position, the lug is located on one side of the rotation axis, and the lug is inserted into the rear end of the steering head.

The beneficial effects of the additional technical features of the present invention will be described in the specific embodiments of this specification.

Description of drawings

Fig. 1 is the front view of the power device for changing the direction of operation to prevent misoperation in the embodiment of the present utility model;

FIG. 2 is a partial cross-sectional view of a direction-changing surgical power device for preventing misoperation in an embodiment of the present utility model;

3 is a perspective view of a power device for changing the direction of operation for preventing misoperation in an embodiment of the present invention;

Fig. 4 is the partial enlarged schematic diagram of A place in Fig. 3;

5 is a schematic diagram of the internal structure of the power device for changing the direction of operation for preventing misoperation in an embodiment of the present invention;

Fig. 6 is the partial enlarged schematic diagram at B in Fig. 5;

Fig. 7 is the three-dimensional structure schematic diagram of steering head;

8 is a partial enlarged schematic view of the power device for changing the direction of operation for preventing misoperation in an embodiment of the present invention;

FIG. 9 is a schematic three-dimensional structural diagram of the unlocking sleeve and the tube seat of the direction-changing power device for preventing misoperation according to the embodiment of the present invention.

Description of reference numerals: 10, handle; 11, fixing sleeve; 12, unlocking sleeve; 121, locking boss; 122, status indicator; 13, adjusting screw sleeve; 14, pipe seat; 141, axial groove; 142. Rotation channel; 143. Symbol for upper unlocking state; 144. Symbol for locking state; 15. Spring; 16. Main body of handle; , ball head; 23, drive joint; 40, cutter head; 41, outer cutter head; 42, inner cutter head; 421, spherical groove; 50, instrument tube; 51, inner auxiliary ear; 52, inner ear hole; 60, steering head; 61, external auxiliary ear; 62, external ear hole; 63, second connecting part; 631, horizontal opening; 632, vertical opening; 64, guide groove; 70, pulling part; 71, first connecting part; 711, 712, vertical part; 72, lug; 80, pin; 90, guide screw head; 100, camera; 101, mounting part; 102, image sensor; 103, lighting part.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that, the following embodiments and features in the embodiments may be combined with each other unless there is conflict.

As shown in FIGS. 1 and 2 , the power device for changing the direction of operation for preventing misoperation in one embodiment of the present invention includes a handle 10 , a knife, a tool head direction changing device and a camera assembly, wherein the handle 10 is used for the doctor to hold hold. As an example, the handle 10 includes a handle body 16 , a tube base 14 and a fixing sleeve 11 . The handle body 16 is trident-shaped for easy gripping, and the tube base 14 is connected to the front end of the handle body 16 .

The cutter is used for excision of human tissue, which includes a cutter bar 20 and a cutter head 40, the rear end of the cutter bar 20 is connected with the handle 10, and the front end of the cutter bar 20 and the rear end of the cutter head 40 are connected by a rotating connection mechanism, so that the cutter The head 40 can be rotated about the rotation axis X to adjust the angle between the center line axis of the cutter head 40 and the center axis of the cutter bar 20 .

The tool may be a planing tool, a grinding tool, a drilling tool, and a drilling tool. This embodiment takes a planing tool as an example for description. As shown in FIGS. 1 and 2 , the cutter bar 20 includes an outer cutter tube 21 and an inner cutter tube 22 . The rear end of the outer cutter tube 21 is fixed on the handle 10 . Specifically, the rear end of the outer cutter tube 21 passes through the fixing sleeve 11 , The unlocking sleeve 12 and the adjusting screw sleeve 13 are fixed in the inner hole of the tube seat 14 and the handle main body 16 . The inner knife tube 22 is arranged in the outer knife tube 21 and can rotate relative to the outer knife tube 21. The rear end of the inner knife tube 22 extends out of the outer knife tube 21 and extends from the rear end of the handle 10. The rear end of 22 is connected with a drive joint 23, which is used for connecting with the output end of the drive device (not shown in the figure). The inner knife tube 22 is driven to rotate relative to the outer knife tube 21 in the circumferential direction by the driving device.

The cutter head 40 includes an outer cutter head 41 and an inner cutter head 42, the inner cutter head 42 is rotatably arranged in the outer cutter head 41, and the rear end of the inner cutter head 42 is connected with the front end of the inner cutter tube 22 through a rotating connection mechanism, so that the inner cutter head 42 is rotatably arranged in the outer cutter head 41. The cutter head 42 can rotate around the rotation axis X while being driven by the inner cutter tube 22 to rotate, so as to realize variable direction. A cutting window is provided on the tube wall of the outer cutter head 41 close to the front end, and the front end of the inner cutter head 42 is provided with a cutting edge portion, and the cutting edge portion cooperates with the cutting window to cut the human tissue extending into the cutting window, and the inner cutter head 42 The rear end of the blade protrudes from the rear end of the outer cutter head 41 and is connected to the rotational connection structure of the inner cutter tube 22 .

The rotational connection mechanism in this embodiment is a ball joint, which includes a spherical groove 421 provided on the rear end of the inner cutter head 42 and a ball head 221 provided on the front end of the inner cutter tube 22 and matched with the spherical groove 421 , the ball head 221 is snapped into the spherical groove 421 and rotates with the spherical groove 421 . As an alternative, the rotational connection mechanism may also be a ball cage type universal joint or the like.

The cutter head direction changing device is used to drive the cutter head 40 to rotate around the rotation axis X. In one embodiment, the cutter head direction changing device includes an instrument tube 50 , a steering head 60 , a pulling member 70 and a pulling drive mechanism, the instrument tube 50 is sleeved on the outer periphery of the cutter bar 20 and the cable, and the instrument tube 50 is The rear end is inserted and fixed in the fixing sleeve 11 of the handle 10 . The steering head 60 is sleeved on the outer periphery of the cutter head 40 and the camera head 100 , and the rear end of the steering head 60 and the front end of the instrument tube 50 are rotatably connected around the rotation axis X.

There are various ways to connect the rear end of the steering head 60 to the front end of the instrument tube 50. As an example, as shown in FIG. 6, two inner pairs are arranged at the front end of the instrument tube 50 opposite to each other along the rotation axis X direction. The ear 51 has inner ear holes 52 on the inner and auxiliary ears 51 . As shown in FIG. 7 , at the rear end of the steering head 60, there are two external auxiliary ears 61 arranged opposite to each other in the direction of the rotation axis X, and the external auxiliary ears 61 are provided with external ear holes 62. As shown in FIG. 4 , the two outer auxiliary ears 61 of the steering head 60 are respectively located outside the two inner auxiliary ears 51 of the instrument tube 50 , and the outer ear holes 62 on the outer auxiliary ears 61 and the inner ear holes on the inner auxiliary ears 51 Opposite to 52, the pin shaft 80 extending along the rotation axis X passes through the outer ear hole 62 and the inner ear hole 52 to rotatably connect the rear end of the steering head 60 with the front end of the instrument tube 50. The rear end of the steering head 60 and the front end of the instrument tube 50 can be connected by other rotation pairs in addition to the pin shaft 80. A cylinder is arranged on one of the holes, which is matched with the circular hole, and the cylinder is rotatably inserted into the circular hole.

The pulling member 70 is disposed in the instrument tube 50 and can move back and forth along the axial direction of the instrument tube 50 , and the front end of the pulling member 70 is connected with the rear end of the steering head 60 . The axial forward and backward movement of the pulling member 70 drives the steering head 60 to rotate around the rotation axis X. The front end of the pulling member 70 and the rear end of the steering head 60 can be connected in various ways. For example, the front end of the pulling member 70 and the rear end of the steering head 60 are connected by a steel belt or by a rack and pinion mechanism.

The pulling member 70 can be in the shape of a wire, a rod or a tube. For the convenience of assembly, the pulling member 70 in this embodiment is a tubular shape. within the pulling member 70 .

In one embodiment, the pulling member 70 is rotatable relative to the instrument tube 50 between an unlocked position (the position shown in FIGS. 3 and 4 ) and a locked position, and the cutter head direction changing device further includes a Unlocking the sleeve 12, the unlocking sleeve 12 is fixedly sleeved on the rear end of the pulling member 70, and the unlocking sleeve 12 is used to drive the pulling member 70 to rotate between the unlocking position and the locking position; A locking mechanism is provided between the rear ends of the head 60 . When the pulling member 70 is in the unlocked position, the locking mechanism allows the steering head 60 to rotate about the axis of rotation, and when the pulling member 70 is in the locked position, the locking mechanism restricts the rotation of the steering head 60 about the axis of rotation, thereby enabling the steering head 60 to rotate At the same time, it has a variable direction function and an invariable direction function, which expands the function and meets the different needs of doctors.

The front end of the pulling member 70 is provided with a first connecting portion 71 , and the rear end wall of the steering head 60 on the side of the rotation axis is provided with a second connecting portion 63 that cooperates with the first connecting portion 71 . It is connected with the rear end of the steering head 60 through the first connecting portion 71 and the second connecting portion 63 . When the pulling member 70 is at the unlocking position, the first connecting portion 71 is combined with the second connecting portion 63 , and when the pulling member 70 is at the locking position, the first connecting portion 71 is disengaged from the second connecting portion 63 . As an example, the first connecting portion 71 is T-shaped (as shown in FIG. 6 ), the first connecting portion 71 includes a horizontal portion 711 and a vertical portion 712 , and the second connecting portion 63 is a T-shaped notch ( 7), the second connecting portion 63 includes a transverse opening 631 extending along the circumferential direction of the steering head 60 and a vertical opening 632 extending along the axial direction of the steering head 60, the width of the vertical opening 632 is smaller than the width of the vertical portion 712 . In this way, when the pulling member 70 is rotated to the unlocking position, the transverse portion 711 is snapped into the transverse opening 631 and can be rotated in the transverse opening 631 .

Preferably, the rear end of the steering head 60 is provided with two second connecting parts 63 , and the two second connecting parts 63 are located on both sides of the rotation axis X, respectively. As shown in FIGS. 2 and 3 , when the pulling member 70 is rotated until the first connecting portion 71 is combined with the second connecting portion 63 on the upper side, the steering head 60 can be rotated upward, and when the pulling member 70 is rotated to the first connecting portion When the 71 is combined with the second connecting portion 63 on the lower side, the steering head 60 can be rotated downward, so that the rotation range of the steering head 60 is greatly increased.

Preferably, a guide groove 64 extending in the circumferential direction is provided on the inner wall of the steering head 60 between the two second connecting parts 63, and the first connecting part 71 slides along the guide groove 64 when the pulling member 70 rotates, so that the The first connecting portion 71 rotates smoothly.

The locking mechanism includes a lug 72 extending axially forward from the front end face of the pulling member 70 (see FIG. 6 ). When the pulling member 70 is rotated to the unlocked position, the lug 72 is located on the axis of rotation X, and the lug 72 The position of is corresponding to the position of the inner auxiliary ear 51, and the steering head 60 can rotate freely at this time. When the pulling member 70 is rotated to the locking position, the lug 72 is located on one side of the rotation axis X, the position of the lug 72 is staggered from the position of the inner auxiliary lug 51, and the lug 72 is inserted into the rear end of the steering head 60, The turning of the steering head 60 is restricted.

The pulling driving mechanism is arranged on the handle 10, and the pulling driving mechanism is connected with the rear end of the pulling member 70. The pulling driving mechanism is used to drive the pulling member 70 to move back and forth in the axial direction, thereby driving the steering head 60 to rotate around the axis X Rotate, and then drive the cutter head and the camera 100 to rotate around the rotation axis X synchronously.

As shown in Figures 1 and 2, as an example, the pulling drive mechanism includes an adjusting screw sleeve 13 and an elastic part, the adjusting screw sleeve 13 is located on the front side of the unlocking sleeve 12, and the outer peripheral surface of the rear end of the fixing sleeve 11 is provided with an external thread, The inner wall of the adjusting screw sleeve 13 is provided with an internal thread matched with the external thread, and the adjusting screw sleeve 13 and the fixing sleeve 11 are connected by the external thread and the internal thread. The elastic member is used to drive the unlocking sleeve 12 to move forward. In this embodiment, the elastic component is the spring 15 , the rear end of the unlocking sleeve 12 is provided with a spring installation groove, the front end of the spring 15 is installed in the spring installation groove, and the rear end is installed in the tube base 14 .

In one embodiment, the rear end of the unlocking sleeve 12 and the front end of the tube base 14 are plug-fitted, and a positioning mechanism is provided between the rear end of the unlocking sleeve 12 and the front end of the tube base 14 for when pulling When the pulling member 70 rotates to the locking position, the positioning mechanism restricts the axial movement of the unlocking sleeve 12 and allows the unlocking sleeve 12 to rotate. When the pulling member 70 rotates to the unlocking position, the positioning mechanism restricts the rotation of the unlocking sleeve 12 and allows the unlocking sleeve 12 to rotate axially. move.

In this embodiment, the rear end of the unlocking sleeve 12 is inserted into the front end of the socket 14 . As shown in FIG. 9 , the positioning mechanism includes a locking boss 121 on the outer peripheral surface of the rear end of the unlocking sleeve 12 and a groove on the inner wall of the tube base 14 for matching with the locking boss 121 . The groove includes a circumferential groove 142 extending in the circumferential direction and an axial groove 141 extending in the axial direction and communicating with both ends of the rotating groove 142 respectively. Slide in the axial channel 141 . Of course, as an alternative, the positions of the locking bosses 121 and the grooves can be reversed, that is, the locking bosses 121 are arranged on the inner wall of the tube base 14 and the grooves are arranged on the outer peripheral surface of the rear end of the unlocking sleeve 12 . The front end of the socket 14 is inserted into the rear end of the unlocking sleeve 12 .

For the doctor's operation, a state indicating symbol 122 is provided on the outer peripheral surface of the front end of the unlocking sleeve 12 , and the state indicating symbol 122 is located on the same axis as the locking boss 121 . The outer peripheral surface of the tube base 14 is provided with a locking state identification symbol 144, an upper unlocking state identification symbol 143 and a lower unlocking state identification symbol (not shown in the figure), and the unlocked state identification symbol is relative to the middle position of the rotation channel 142. Correspondingly, the upper unlocked state identification symbol 143 and the lower unlocked state identification symbol (not shown in the figure) correspond to the positions of the two axial grooves 141 respectively.

In one embodiment, the central hole of the unlocking sleeve 12 is a stepped hole, the unlocking sleeve 12 includes a small hole section with a smaller central hole and a large hole section with a larger central hole, the small hole section is fixedly connected with the pulling member, and the large hole The segment is sleeved on the guide screw head 90 and threadedly engaged with the guide screw head 90, and the guide screw head 90 is in clearance fit with the pulling member. In this way, the guide screw head 90 acts as a circumferential damping effect on the unlocking sleeve 12 . When the unlocking sleeve 12 rotates to a certain angle, the guide screw head 90 keeps the unlocking sleeve 12 at the angle to avoid the rotation deviation of the unlocking sleeve 12 .

The camera assembly is used to collect image signals, and includes a camera 100 and a cable (not shown in the figure), the camera 100 is connected to the cutter head 40, and rotates with the rotation of the cutter head 40, and the front end of the cable is connected to the camera 100 .

In the direction-changing operation power device for preventing misoperation of the present invention, the camera head 100 is arranged on the cutter head 40, and the rotation angle of the cutter head and the viewing angle of the camera head 100 can be adjusted simultaneously through the cutter head direction changing device, so the doctor only needs to hold it with one hand. The operation difficulty of the doctor is reduced; in addition, the camera 100 and the cutter head are relatively stationary, so that the cutter head and the camera head 100 can be operated synchronously, which saves the doctor's observation time and greatly improves the safety of the operation. It can be seen that by combining the endoscope with the surgical power system, the direction-changing surgical power device for preventing misoperation of the present invention solves the problem of the inconvenience of adjusting the angle during endoscopic surgery by swinging the endoscope tube as a whole and using surgical instruments in conjunction with it. The problem.

As shown in FIG. 8 , the camera 100 includes a mounting member 101, an image sensor 102 and an illumination member 103, the mounting member 101 is fixed in the steering head 60, and the image sensor 102 and the lighting member 103 are mounted on the mounting member 101. The image sensor 102 may be a CMOS (abbreviation of Complementary Metal Oxide Semiconductor) or a CCD (abbreviation of Charge Coupled Device) chip, and the lighting element 103 may be an LED lighting element. As an example, the mounting member 101 is cylindrical, the mounting member 101 is inserted into the steering head 60, the mounting member 101 and the steering head 60 are fixed by bonding or welding, and the mounting member 101 is provided with an image sensor mounting hole and a lighting member mounting hole, The image sensor 102 and the lighting member 103 are installed in the image sensor mounting hole and the lighting member mounting hole, respectively. A mounting hole extending along the axial direction of the steering head 60 is also provided on the mounting member 101 , and the cutter head 40 is passed through the mounting hole.

The working principle of the steering power device for preventing misoperation of the present utility model is as follows:

Before the operation, the direction-changing surgical power device is in the initial state, that is, the included angle between the centerline axis of the steering head 60 and the centerline axis of the instrument tube 50 is zero, and the pulling member 70 is in the locking position, that is, the first connecting portion 71 is disengaged from the second connecting portion 63 . Moreover, the locking boss 121 of the unlocking sleeve 12 is located in the rotational channel 142 of the tube base 14, which restricts the axial movement of the unlocking sleeve 12, and at the same time, the unlocking sleeve 12 is threadedly connected with the guide screw head 90, which restricts the rotation of the unlocking sleeve 12 and unlocks the The status indicator 122 of the sleeve 12 is opposite the locked status indicator 144 of the socket 14 .

When the doctor inserts the steering head 60 and the instrument tube 50 into the human body through the hole, and the doctor needs to adjust the field of view angle and the surgical cutting angle of the camera 100 in the patient's body, unlock it first, that is, rotate the unlocking sleeve 12 to the left or right by 90 degrees by hand , the locking boss 121 rotates to the end section in the rotation channel 142 , that is, is located in the axial channel 141 , and drives the first connecting part 71 of the pulling member 70 to be located in the upper or lower side of the steering head 60 . In the second connecting portion 63 , the state indicating symbol 122 of the unlocking sleeve 12 is opposite to the upper unlocking state identification symbol 143 or the lower unlocking state identification symbol of the socket 14 .

After unlocking, the adjusting screw sleeve 13 is rotated, and the adjusting screw sleeve 13 moves backward in the axial direction, so that the locking boss 121 of the unlocking sleeve 12 enters the axial groove 141 of the tube base 14, and drives the pulling member 70 to the rear end Axial movement causes the steering head 60 to rotate up or down about the pin 80 .

During the steering angle adjustment process, that is, when the adjusting screw sleeve 13 is rotated to axially move the unlocking sleeve 12 to the rear end, the rear end of the unlocking sleeve 12 is subjected to the reaction force of the compression spring 15 to the front side, and the front end of the unlocking sleeve 12 is affected by the adjusting screw The rear end face of the sleeve 13 is restricted, and the threaded connection between the adjusting screw sleeve 13 and the fixed sleeve 11 restricts the adjusting screw sleeve 13 from moving forward. Therefore, when the rotation adjustment angle is stopped, the spring 15 and the adjusting screw sleeve 13 lock the unlocking sleeve. 12, the adjustment angle is fixed; at this time, the locking boss 121 enters the axial channel 141 of the tube base 14, and the axial channel 141 restricts the circumferential rotation of the locking boss 121, thereby locking The circumferential rotation of the unlocking sleeve 12 after the angle adjustment is adjusted.

The above examples only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention.

Claims (10)

1. A direction-changing surgical power device for preventing misoperation, comprising: handle; a cutter, which comprises a cutter bar and a cutter head, the rear end of the cutter bar is connected with the handle, and the front end of the cutter bar is connected with the rear end of the cutter head; a cutter head direction changing device, which comprises a pulling member, the pulling member can move axially relative to the cutter bar, and the front end of the pulling member is connected to the cutter head; It is characterized in that, the cutter head direction changing device further includes an unlocking sleeve and a positioning mechanism, the unlocking sleeve is fixedly connected with the rear end of the pulling member, and is used for driving the pulling member in the unlocking position and the locking position. The positioning mechanism is arranged between the unlocking sleeve and the handle; when the pulling member is in the locking position, the positioning mechanism restricts the axial movement of the unlocking sleeve, allowing all The unlocking sleeve rotates, and when the pulling member rotates to the unlocking position, the positioning mechanism restricts the rotation of the unlocking sleeve and allows the unlocking sleeve to move axially. 2 . The misoperation-preventing power device for changing direction surgery according to claim 1 , wherein the handle comprises a tube seat located on the rear side of the unlocking sleeve, and the rear end of the unlocking sleeve is connected to the tube seat. 3 . The front end is plugged and fitted, and the positioning mechanism includes a locking boss arranged on the rear end of the unlocking sleeve or the front end of the tube seat and a front end of the tube seat or the rear end of the unlocking sleeve. a channel matched with the locking boss, the channel includes a circumferential channel extending in the circumferential direction and an axial channel extending in the axial direction and communicating with one end of the spiral channel; When the pulling member is in the locking position, the locking boss is located in the rotation channel, and when the pulling member is rotated to the unlocking position, the locking boss is positioned in the axial groove inside the road. 3 . The misoperation-preventing direction-changing surgical power device according to claim 2 , wherein the groove comprises two axial grooves, and the two axial grooves are respectively connected with the rotating shaft. 4 . Connect to both ends of the channel. 4 . The misoperation-preventing direction-changing surgical power device according to claim 3 , wherein the included angle between the two axial grooves is a right angle. 5 . 5 . The misoperation-preventing power device for changing direction surgery according to claim 2 , wherein a status indicator is provided on the outer peripheral surface of the front end of the unlocking sleeve, and a locking state is provided on the outer peripheral surface of the tube seat. 6 . Identification symbol and unlocking state identification symbol; when the unlocking sleeve is rotated to the locking position, the state indicating symbol is located opposite to the locking state identification symbol, and when the unlocking sleeve is rotated to the unlocking position , the state indicating symbol is opposite to the unlocking state identification symbol. 6 . The misoperation-preventing power device for changing direction surgery according to claim 1 , wherein the central hole of the unlocking sleeve is a stepped hole, and the unlocking sleeve comprises a small hole segment with a smaller central hole and a central hole. 7 . A larger large hole section, the small hole section is fixedly connected with the pulling member, the large hole section is sleeved on the guide screw head and is threadedly matched with the guide screw head, and the guide screw head is connected with the Retractor clearance fit. 7 . The power device for changing direction surgery according to claim 1 , wherein the handle comprises a fixing sleeve located on the front side of the unlocking sleeve, and the tool head direction changing device further comprises a pulling drive. 8 . The pulling and driving mechanism includes an adjusting screw sleeve and an elastic part, the adjusting screw sleeve is provided on the rear end of the fixing sleeve and is threadedly matched with the rear end of the fixing sleeve, and the elastic part is provided at the rear end of the fixing sleeve. The rear end of the unlocking sleeve and the handle are used to drive the unlocking sleeve to move forward. 8 . The misoperation-preventing power device for direction-changing surgery according to claim 1 , wherein the tool head direction-changing device further comprises an instrument tube and a steering head, and the instrument tube is sleeved with 8 . Outside the cutter bar, the rear end of the instrument tube is fixed on the handle, the steering head is sleeved on the outside of the cutter head, and the rear end of the steering head is connected to the back end of the instrument tube. The front end is rotatably connected around the rotation axis, the front end of the pulling member is provided with a first connection part, and the rear end of the steering head on one side of the rotation axis is provided with a first connection part matched with the first connection part. Two connecting parts, the front end of the pulling member and the rear end of the steering head are connected through the first connecting part and the second connecting part. 9 . The misoperation-preventing power device for changing direction surgery according to claim 8 , wherein a locking mechanism is provided between the front end of the pulling member and the rear end of the steering head, and when the pulling The locking mechanism allows the steering head to rotate about the axis of rotation when the puller is in the unlocking position, and restricts the steering head about the axis of rotation when the pulling member is in the locking position turn. 10 . The misoperation-preventing direction-changing surgical power device according to claim 9 , wherein the locking mechanism comprises a lug extending axially forward from the front end surface of the pulling member, and when the When the pulling member rotates to the unlocking position, the lug is located on the rotation axis, and when the pulling member rotates to the locking position, the lug is located on one side of the rotation axis, And the lug is inserted into the rear end of the steering head.

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