Electric mechanical hip joint prosthesis ceramic lining taking-out device

Abstract

An electric mechanical hip joint prosthesis ceramic lining taking-out device comprises a motor device, the motor device is electrically connected with a battery, the output end of the motor device is connected with a cam device, the cam device is connected with a first transmission part, the first transmission part and a second transmission part form a hinged structure through a connecting part, and the connecting part comprises a plug pin and a first bearing; the first bearing is arranged at the end, connected with the second transmission piece, of the first transmission piece, the plug pin is inserted into a bearing hole of the first bearing in a matched mode, and the second transmission piece is detachably connected with a striking piece. The hip joint prosthesis further comprises a support, support legs are hinged to the connecting handle, telescopic pipes are connected to the inner walls of the support legs of the support in a sliding mode, and locking pieces abutting against the telescopic pipes are arranged on the support legs in a penetrating mode, so that a doctor can continuously hit and vibrate the ceramic lining of the acetabular cup with the same frequency and the same force when hitting the hip joint prosthesis. And during beating, the condition that the prosthesis is not easy to displace is ensured, so that the physical strength of a surgeon for taking out the lining and the time required by an operation are saved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an electric mechanized hip joint prosthesis ceramic liner removal device. Background Art

[0002] With the continuous advancement of medical technology, artificial hip replacement has become one of the effective methods for treating hip joint diseases. However, during total hip replacement, the ceramic liner may need to be removed for adjustment due to unsatisfactory angle of the acetabular cup; after joint replacement, revision surgery is required due to factors such as prosthesis wear and loosening, prosthesis rupture, infection, and periprosthetic fracture. Removal of the ceramic liner during the above surgeries is a challenging operation.

[0003] Currently, the main method for removing hip prostheses is for doctors to manually tap the hip prostheses during surgery. However, the doctor will consume a lot of physical energy during the tapping process, which is not conducive to subsequent surgery. In addition, it is difficult for doctors to ensure that the frequency of tapping remains stable, which may affect the stability of the hip joint and increase the risk of prosthesis dislocation.

[0004] In addition, in the current method of removing hip prostheses, the prosthesis is easily displaced when the doctor taps it, which is not conducive to the smooth progress of the operation and is also likely to cause damage to the prosthesis and surrounding bones. Summary of the invention

[0005] In view of the shortcomings of the background technology, the object of the present invention is to provide an electric mechanized hip prosthesis ceramic liner removal device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An electric mechanized hip joint prosthesis ceramic liner removal device, comprising:

[0008] A motor device, wherein the motor device is electrically connected to a battery, and an output end of the motor device is connected to a cam device, the cam device is connected to a first transmission member, the first transmission member is hinged to a second transmission member through a connecting member, the connecting member includes a latch and a first bearing, the first bearing is arranged at one end where the first transmission member and the second transmission member are connected to each other, the latch is plugged into a bearing hole of the first bearing, and the other end of the second transmission member is detachably connected to a striking member;

[0009] a control device, the control device being electrically connected to the motor device, and the control device being also electrically connected to a switch device, and the control device and the switch device being both electrically connected to the battery; and

[0010] The bracket comprises a plurality of leg tubes, wherein the leg tubes are hinged to the connecting handle, the bottom of the leg tubes are adapted to the size of the positioning holes on the top edge of the hip joint metal cup, the inner wall of the leg tubes of the bracket is slidably connected with a telescopic tube, and the leg tubes of the bracket are penetrated with locking pieces that abut against the telescopic tube.

[0011] Furthermore, an anti-slip pad is provided at the bottom of the leg tube.

[0012] Furthermore, the second transmission member includes a piston rod, one end of the piston rod is connected to the first transmission member via a connector, and the other end of the piston rod is detachably connected to the striking member.

[0013] Furthermore, it also includes a reinforcement member, which is arranged inside the first transmission member.

[0014] Furthermore, the striking member includes a connecting portion and a striking head, one end of the connecting portion is detachably connected to the second transmission member, and the other end of the connecting portion is connected to the striking head.

[0015] Furthermore, the connecting portion is a hollow structure, and the striking head is a solid conical structure.

[0016] Furthermore, it also includes a shell, in which a motor frame and the control device are arranged, the motor device is assembled on the motor frame, and the outer side wall of the shell is provided with a switch device.

[0017] Furthermore, an indicator light is provided on the outside of the shell, the indicator light is electrically connected to the control device, and the indicator light can display the usage status.

[0018] Furthermore, the housing also includes a hand-held portion.

[0019] Furthermore, a plurality of heat dissipation holes are provided on a side of the outer wall of the shell close to the control device.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention proposes an electric mechanized hip prosthesis ceramic liner removal device, which adopts a motor device as the driving device of the removal device, abandons the manual knocking removal method, so that the doctor can continuously, at the same frequency and with the same force, strike and vibrate the acetabular cup ceramic liner when knocking the hip prosthesis, saving the surgeon's physical strength in removing the liner and the time required for the operation, while also reducing the damage to the metal cup and surrounding bones around the acetabulum.

[0022] 2. The present invention proposes an electric mechanized hip prosthesis ceramic liner removal device, which is also provided with a bracket for use with the removal device to make the knocking more precise. The fulcrum of the bracket is adapted to the size of the fixing hole on the hip joint metal cup, and the bracket is provided with an adjustment device for adjusting the opening and closing size of the leg tube. The leg tube is also provided with a telescopic tube with adjustable length, so that the bracket can adapt to acetabular cups of different sizes.

[0023] 3. The present invention proposes an electric mechanized hip prosthesis ceramic liner removal device, in which the first transmission member is connected to the piston rod through a connecting head, avoiding direct connection between the piston rod and the transmission member, and optimizing the force structure of the piston rod. The piston rod is not easy to wear and fall off during use, thereby extending the service life of the device.

[0024] 4. The electric mechanized hip joint prosthesis ceramic liner removal device proposed by the present invention has a hollow structure for the connection part of the striking piece and a solid conical structure for the striking head. This structural setting can reduce the weight of the device, which allows the user to continue to operate for a longer time and reduce fatigue. In addition, the striking device can be detachably connected to the transmission part, so that the doctor can match the appropriate striking piece according to the size of the hip joint prosthesis during the operation, thereby improving the accuracy of the operation.

[0025] 5. The present invention proposes an electric mechanized hip prosthesis ceramic liner removal device, which has an indicator light on the outside of the shell, and the indicator light is electrically connected to the control device. Through the on and off, flashing or color change of the indicator light, the doctor can intuitively understand the working status and operation of the removal device and take corresponding measures in time, thereby improving work efficiency and maintenance convenience.

[0026] 6. The present invention proposes an electric mechanized hip prosthesis ceramic liner removal device, in which a plurality of heat dissipation holes are provided on the side of the outer wall of the shell close to the control device, so that the heat dissipation path of the removal device can be shortened, thereby preventing the heat energy generated by the device from being discharged in time and causing damage to the device itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is an overall schematic diagram of the present invention;

[0029] Figure 2 It is an overall cross-sectional view of the present invention;

[0030] Figure 3 It is a schematic diagram of the driving device and the transmission device of the present invention;

[0031] Figure 4 It is an exploded view of the driving device and the transmission device of the present invention;

[0032] Figure 5 It is a schematic diagram of the control device of the present invention;

[0033] Figure 6 is a schematic diagram of a bracket of the present invention;

[0034] Figure 7 It is a schematic diagram of the bracket locking member of the present invention when it is not tightened;

[0035] Figure 8 It is a schematic diagram of the bracket locking member of the present invention when being tightened.

[0036] In the figure, 10, housing; 201, motor device; 202, base; 301, cam device; 302, first transmission member; 303, second transmission member; 3031, piston rod; 3032, connector; 304, connector; 3041, latch; 3042, first bearing; 3043, second bearing; 401, connecting part; 402, striking head; 50, restraining member; 60, switch device; 70, control device; 80, battery; 90, bracket; 901, bracket leg; 902, connecting handle; 903, telescopic tube; 904, locking member. DETAILED DESCRIPTION

[0037] Combine the following Figures 1 to 8 The present invention is described in detail.

[0038] An electric mechanized hip joint prosthesis ceramic liner removal device, comprising: a motor device 201, the motor device 201 is electrically connected to a battery 80, and the output end of the motor device 201 is connected to a cam device 301, the cam device 301 is connected to a first transmission member 302, the first transmission member 302 is hinged to a second transmission member 303 through a connecting member 304, the connecting member 304 includes a latch 3041 and a first bearing 3042, the first bearing 3042 is arranged at one end where the first transmission member 302 and the second transmission member 303 are connected to each other, the latch 3041 is plugged into the bearing hole of the first bearing 3042, and the other end of the second transmission member 303 is detachably connected to a striking member; in this embodiment, the motor device 201 is referred to as a driving device of the removal device, and the first transmission member 302, the second transmission member 303 and the connecting member 304 are collectively referred to as a transmission device. The motor device 201 is used as a driving device, and manual hammering is abandoned, so that the doctor can continuously, at the same frequency and with the same force, strike and vibrate the ceramic lining of the acetabulum cup when hammering the hip joint prosthesis, saving the surgeon's physical strength in removing the liner and the time required for the operation, while also reducing damage to the metal cup and surrounding bones around the acetabulum.

[0039] Preferably, the connecting member 304 also includes a second bearing 3043, which can be connected to the first transmission member 302 to strengthen the structure of the first transmission member 302; a base 202 is provided between the motor device and the cam device 301, and the motor device can be installed on the base 202. The cam device 301 is connected to the bottom of the base 202, so that the connection between the driving device and the transmission device is more stable.

[0040] In this embodiment, the second transmission member 303 includes a piston rod, one end of which is connected to the first transmission member 302 through a connector, and the other end of the piston rod is detachably connected to a striking member. The first transmission member 302 is connected to the piston rod through a connector, which avoids direct connection between the piston rod and the transmission member, and can optimize the force structure of the piston rod. The piston rod is not easy to wear and fall off during use, which extends the service life of the device. One end of the connecting part 401 is detachably connected to the second transmission member 303, and the other end of the connecting part 401 is connected to a striking head 402, and the connecting part 401 is a hollow structure, and the striking head 402 is a solid conical structure. This structural setting can reduce the weight of the device, which allows the user to continue operating for a longer period of time and reduce fatigue.

[0041] Specifically, the connector is provided with a latch hole 3041. After the first bearing 3042 is installed on the first transmission member 302, the latch hole 3041 passes through the latch hole 3041 on the connector and the bearing hole on the first bearing 3042, thereby completing the hinge structure of the first transmission member 302 and the second transmission member 303. The connector can be connected to the piston rod by common connection methods such as threading or welding. A constraint 50 is also provided at one end of the piston rod connected to the connecting portion 401. The constraint 50 can limit the movement direction of the piston rod so that it can only move in a straight line direction.

[0042] Preferably, the striking piece connecting portion 401 is 4 cm long, the striking head 402 is 2 cm long, and the striking head 402 is provided with a protective layer on the outer cover, which can play a protective and buffering role when the striking head 402 strikes the vibrating ceramic lining, and the shape of the connecting portion 401 is adapted to the shape of the piston rod, and the cross-section can be selected to be a common structure such as a rectangle or a circle.

[0043] In this embodiment, the frequency of the impact vibration of the removal device when removing the ceramic liner of the hip prosthesis is usually required to be between 10 Hz and 100 Hz, and the impact force of the impact head 402 on the ceramic liner of the hip prosthesis is stabilized in the range of 8N to 12N.

[0044] Preferably, the impact force on the ceramic liner of the hip prosthesis is stabilized at 10N.

[0045] In this embodiment, the second transmission member 303 performs piston motion reciprocatingly along the power direction.

[0046] Specifically, if the direction in which the connecting portion 401 is set is the “front”, the power movement direction of the motor device 201 is the “forward and backward movement”, and the second transmission member 303 performs reciprocating piston movement in the “forward and backward direction”.

[0047] Preferably, the piston rod and the connecting portion 401 can be connected by a threaded connection or a snap connection.

[0048] In this embodiment, the removal device further includes a control device 70 , which is electrically connected to the motor device 201 , and is also electrically connected to a switch device 60 , and both the switch device 60 and the control device 70 are electrically connected to a battery 80 .

[0049] Specifically, the control device 70 is a PCB component; the switch device 60 is provided with an adjustment gear and a paddle, and the striking frequency can be adjusted by turning the paddle, each adjustment gear corresponds to an output frequency gear of the motor device 201, and each output frequency gear of the motor device 201 corresponds to a target speed. The PCB component determines the PWM signal duty cycle compensation value of the motor device 201 according to the relationship between the driving voltage and the rated voltage and in combination with the output frequency gear information of the motor device 201 to adjust different striking frequencies, thereby achieving precise control of the striking effect, facilitating doctors to achieve more precise operations during the operation, and causing no damage to the patient and the hip prosthesis device.

[0050] In this embodiment, the removal device is also provided with a shell 10, a motor frame is provided inside the shell 10, the motor device 201 is assembled on the motor frame, the cam device 301, the control device 70, the battery 80 and the transmission assembly consisting of the first transmission member 302 and the second transmission member 303 are all placed in the shell 10, wherein the piston rod of the second transmission member 303 is partially placed outside the shell 10.

[0051] Specifically, a detachable cover is provided on the housing 10, which can be used to replace the battery 80 of the removal device.

[0052] In this embodiment, the housing 10 also includes a handheld portion to facilitate operation by a doctor.

[0053] Specifically, the length of the shell 10 is 20 cm, of which the height of the hand-held portion is 15 cm, and a switch device 60 is provided on the shell 10 3 cm away from the inner wall of the hand-held portion. This size setting is convenient for the doctor to grasp, which can reduce the pressure and tension of the hand, allowing the doctor to perform the operation for a long time; at the same time, the size setting that is convenient for the doctor to grasp can reduce the unstable factors caused by hand vibration during the operation, reduce the risk of surgery, and make the operation safer and more reliable.

[0054] In this embodiment, an indicator light (not shown) is provided on the outside of the housing 10, and the indicator light is electrically connected to the control device 70. The indicator light can display the use status and the gear status. Through the on and off, flashing or color change of the indicator light, the doctor can intuitively understand the working status and operation of the percussion device, and take corresponding measures in time, thereby improving work efficiency and convenience of maintenance.

[0055] In this embodiment, a plurality of heat dissipation holes (not shown in the figure) are provided on the side of the outer wall of the shell 10 close to the control device 70, which can shorten the heat dissipation path of the removal device and prevent the heat energy generated by the device from being discharged in time and causing harm to the device itself.

[0056] In this embodiment, the removal device also includes a bracket 90, and the bracket 90 includes a plurality of bracket legs 901, and the bracket legs 901 are hinged to the connecting handle 902. The bottom of the bracket legs 901 of the bracket 90 is adapted to the size of the positioning hole on the top edge of the hip joint metal cup. The inner wall of the bracket leg 901 is slidably connected with a telescopic tube 903, and the bracket leg 901 is penetrated with a locking piece 904 abutting against the telescopic tube 903. The telescopic tube 903 can adjust the length of the bracket leg 901, so that the bracket 90 can adapt to acetabular cups of different sizes. Specifically, the bracket 90 can be a two-legged bracket 90 or a tripod bracket 90, and the locking piece 904 is an adjustment screw.

[0057] Preferably, the bracket 90 is a two-legged bracket 90 .

[0058] In this embodiment, an anti-skid pad is provided at the bottom of the bracket leg 901, so that the bracket 90 can be placed more stably on the top edge of the metal cup of the hip joint prosthesis, thereby making it less likely for the hip joint prosthesis to shift when the doctor performs a striking operation.

[0059] The use principle of the bracket 90 in this embodiment is as follows: the bracket legs 901 of the two-legged bracket 90 are hinged to the connecting handle 902, so that the bracket legs 901 of the two-legged bracket 90 can be opened and closed to a certain extent, and a telescopic tube 903 is provided inside the bracket leg 901, and the telescopic tube 903 can be used to adjust the length of the bracket leg 901, and an adjusting screw is provided on the outside of the two bracket legs 901, and the adjusting screw is passed through the bracket leg 901. The doctor can operate the adjusting screw until the adjusting screw abuts against the telescopic tube 903, so that the length of the adjusted bracket leg 901 can be fixed.

[0060] The use principle of this embodiment is: install the bracket 90 on the mounting hole of the hip joint metal cup, and adjust the bracket 90 to fit the size of the hip joint metal cup that needs to be operated.

[0061] When the battery 80 is fully charged, the doctor can turn on the switch device 60 and adjust the required striking gear. The PCB component determines the PWM signal duty cycle compensation value of the motor device 201 according to the relationship between the adjustment gear and the driving voltage and the rated voltage, and in combination with the gear information of the motor device 201, so that the gear of the motor device 201 matches the required striking gear. At this time, the indicator light displays the striking gear information of the removal device so that the doctor can confirm the status of the removal device. Then, when the motor is working, it drives the cam device 301 to move, and the first transmission device connected to the cam device 301 transfers kinetic energy. At this time, the rotational motion of the cam device 301 is converted into linear motion, and the second transmission device connected to the first transmission device performs reciprocating motion back and forth, thereby driving the striking device to strike the ceramic lining of the hip prosthesis, so that the ceramic lining can be removed.

[0062] When the battery 80 is low on power, the doctor can remove the bottom plate of the handheld portion and replace the battery 80, so that the retrieval device can be used at any time.

[0063] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric mechanized hip joint prosthesis ceramic liner removal device, comprising: A motor device, wherein the motor device is electrically connected to a battery, and an output end of the motor device is connected to a cam device, the cam device is connected to a first transmission member, the first transmission member is hinged to a second transmission member through a connecting member, the connecting member includes a latch and a first bearing, the first bearing is arranged at one end where the first transmission member and the second transmission member are connected to each other, the latch is plugged into a bearing hole of the first bearing, and the other end of the second transmission member is detachably connected to a striking member; a control device, the control device being electrically connected to the motor device, and the control device being also electrically connected to a switch device, and the control device and the switch device being both electrically connected to the battery; and The bracket comprises a plurality of bracket legs, the bracket legs are hinged to the connecting handle, the bottom of the bracket legs is adapted to the size of the positioning holes on the top edge of the hip joint metal cup, the inner wall of the leg tube of the bracket is slidably connected with a telescopic tube, and the leg tube is penetrated with a locking piece that abuts against the telescopic tube.

2. The electric mechanized hip joint prosthesis ceramic liner removal device according to claim 1, characterized in that: An anti-skid pad is arranged at the bottom of the leg tube.

3. The electric mechanized hip joint prosthesis ceramic liner removal device according to claim 1, characterized in that: The second transmission member comprises a piston rod, one end of the piston rod is connected to the first transmission member via a connector, and the other end of the piston rod is detachably connected to the striking member.

4. The electric mechanized hip joint prosthesis ceramic liner removal device according to claim 1, characterized in that: It also includes a reinforcement member, which is arranged inside the first transmission member.

5. The electric mechanized hip joint prosthesis ceramic liner removal device according to claim 1, characterized in that: The striking member comprises a connecting portion and a striking head, one end of the connecting portion is detachably connected to the second transmission member, and the other end of the connecting portion is connected to the striking head.

6. The electric mechanized hip joint prosthesis ceramic liner removal device as claimed in claim 5, characterized in that: The connecting portion is a hollow structure, and the striking head is a solid cone structure.

7. The electric mechanized hip joint prosthesis ceramic liner removal device according to claim 1, characterized in that: It also includes a shell, in which a motor frame and the control device are arranged, the motor device is mounted on the motor frame, and a switch device is arranged on the outer side wall of the shell.

8. The electric mechanized hip joint prosthesis ceramic liner removal device according to claim 7, characterized in that: An indicator light is arranged on the outside of the shell, the indicator light is electrically connected to the control device, and the indicator light can display the usage status.

9. The electric mechanized hip joint prosthesis ceramic liner removal device according to claim 7, characterized in that: The housing also includes a handheld portion.

10. The electric mechanized hip joint prosthesis ceramic liner removal device according to claim 7, characterized in that: A plurality of heat dissipation holes are arranged on a side of the outer wall of the shell close to the control device.

Images