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] This utility model relates to the field of medical device technology, and in particular to an electromechanical device for removing ceramic liners from hip joint prostheses. Background Technology

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

[0003] Currently, the main method for removing hip prostheses is for doctors to manually tap the prosthesis during surgery. However, this tapping process consumes a lot of the doctor's energy, which is not conducive to subsequent surgery. Furthermore, it is difficult for doctors to maintain a stable tapping frequency, which may affect the stability of the hip joint and increase the risk of prosthesis dislocation.

[0004] Furthermore, current methods for removing hip joint prostheses often result in prosthesis displacement during percussion, which hinders the smooth progress of the surgery and can easily damage the prosthesis and surrounding bone. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an electromechanical device for removing ceramic liners from hip joint prostheses.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An electromechanical hip joint prosthesis ceramic liner removal device includes:

[0008] A motor device is electrically connected to a battery, and the output end of the motor device is connected to a cam device. The cam device is connected to a first transmission component, and the first transmission component is hinged to a second transmission component via a connector. The connector includes a pin and a first bearing. The first bearing is disposed at one end where the first transmission component and the second transmission component are connected to each other. The pin is inserted into the bearing hole of the first bearing. The other end of the second transmission component is detachably connected to a striking component.

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

[0010] The bracket includes several legs, each leg is hinged to a connecting handle, the bottom of the leg is adapted to the size of the positioning hole on the top edge of the hip joint metal cup, a telescopic tube is slidably connected to the inner wall of the leg, and a locking member abuts against the telescopic tube is provided on the leg.

[0011] Furthermore, the bottom of the foot tube is provided with an anti-slip pad. Furthermore, the second transmission component includes a piston rod, one end of which is connected to the first transmission component via a connector, and the other end of which is detachably connected to the striking component.

[0012] Furthermore, it also includes a reinforcing component, which is disposed inside the first transmission component.

[0013] Furthermore, the striking component includes a connecting part and a striking head, one end of the connecting part is detachably connected to the second transmission component, and the other end of the connecting part is connected to the striking head.

[0014] Furthermore, the connecting part has a hollow structure, while the striking head has a solid conical structure.

[0015] Furthermore, it also includes a housing, in which a motor frame and the control device are provided, the motor device is mounted on the motor frame, and a switch device is provided on the outer wall of the housing.

[0016] Furthermore, an indicator light is provided on the outside of the housing, which is electrically connected to the control device and can display the usage status.

[0017] Furthermore, the housing also includes a handheld part.

[0018] Furthermore, the outer wall of the housing is provided with several heat dissipation holes on the side near the control device.

[0019] The beneficial effects of this utility model are:

[0020] 1. The present invention proposes an electromechanical hip joint prosthesis ceramic liner removal device, which uses a motor as the driving device for the removal device, eliminating the manual knocking removal method. This allows the doctor to continuously, at the same frequency and with the same force, strike and vibrate the acetabular cup ceramic liner when knocking on the hip joint prosthesis, saving the surgeon's physical strength and surgical time, while also reducing damage to the metal cup and surrounding bone around the acetabulum.

[0021] 2. The present invention proposes an electromechanical hip joint prosthesis ceramic liner removal device, which is also equipped with a bracket for use in conjunction with the removal device, making the tapping 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 equipped with an adjustment device that can adjust the opening and closing size of the foot tube. The foot tube is also equipped with a telescopic tube that can adjust the length, so that the bracket can be adapted to hip cups of different sizes.

[0022] 3. The electromechanical hip joint prosthesis ceramic liner removal device proposed in this utility model has a first transmission component connected to the piston rod via a connector, which avoids direct connection between the piston rod and the transmission component. This optimizes the force structure of the piston rod, makes it less prone to wear and detachment during use, and extends the service life of the device.

[0023] 4. This utility model proposes an electromechanical device for removing ceramic liners from hip joint prostheses. The connecting part of the striking component has a hollow structure, while the striking head has a solid conical structure. This structural design reduces the weight of the device, allowing the user to operate continuously for longer periods and reducing fatigue. Furthermore, the striking device is detachably connected to the transmission component, enabling the doctor to match the appropriate striking component according to the size of the hip joint prosthesis during operation, thus improving the accuracy of the procedure.

[0024] 5. The present invention proposes an electromechanical hip joint prosthesis ceramic liner removal device, which has an indicator light on the outside of the housing. The indicator light is electrically connected to the control device. By turning the indicator light on or off, flashing, or changing its color, the doctor can intuitively understand the working status and operation of the removal device and take corresponding measures in a timely manner, thereby improving work efficiency and maintenance convenience.

[0025] 6. The present invention proposes an electromechanical hip joint prosthesis ceramic liner removal device, wherein the outer wall of the housing near the control device is provided with several heat dissipation holes, which can make the heat dissipation path of the removal device shorter and prevent the heat generated by the device from not being discharged in time and causing damage to the device itself. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0028] Figure 2 This is an overall sectional view of the present invention;

[0029] Figure 3 This is a schematic diagram of the drive device and transmission device of this utility model;

[0030] Figure 4 This is an exploded view of the drive device and transmission device of this utility model;

[0031] Figure 5 This is a schematic diagram of the control device of this utility model;

[0032] Figure 6 This is a schematic diagram of the bracket of this utility model;

[0033] Figure 7 This is a schematic diagram of the bracket locking component of this utility model when it is not tightened;

[0034] Figure 8 This is a schematic diagram of the bracket locking component of this utility model when tightened.

[0035] In the diagram, 10 is the housing; 201 is the motor assembly; 202 is the base; 301 is the cam assembly; 302 is the first transmission component; 303 is the second transmission component; 3031 is the piston rod; 3032 is the connector; 304 is the connector; 3041 is the pin; 3042 is the first bearing; 3043 is the second bearing; 401 is the connecting part; 402 is the striking head; 50 is the constraint component; 60 is the switch device; 70 is the control device; 80 is the battery; 90 is the bracket; 901 is the bracket leg; 902 is the connecting handle; 903 is the telescopic tube; and 904 is the locking component. Detailed Implementation

[0036] The following is combined with Figures 1 to 8 This utility model will be described in detail.

[0037] An electromechanical hip joint prosthesis ceramic liner removal device includes: a motor device 201, which 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, and the first transmission member 302 is hinged to a second transmission member 303 via a connector 304. The connector 304 includes a pin 3041 and a first bearing 3042. The first bearing 3042 is disposed at one end where the first transmission member 302 and the second transmission member 303 are connected to each other. The pin 3041 is inserted into the bearing hole of the first bearing 3042. 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 the driving device of the removal device, and the first transmission member 302, the second transmission member 303, and the connector 304 are collectively referred to as the transmission device. Using a motor device 201 as the driving device eliminates the need for manual tapping, allowing doctors to continuously and consistently strike and vibrate the ceramic liner of the acetabular cup when tapping the hip joint prosthesis. This saves surgeons physical effort and surgical time when removing the liner, while also reducing damage to the metal cup and surrounding bone around the acetabulum.

[0038] Preferably, the connector 304 further includes a second bearing 3043, which can be connected to the first transmission component 302 to strengthen the structure of the first transmission component 302; a base 202 is provided between the motor device and the cam device 301, the motor device can be installed on the base 202, and the bottom of the base 202 is connected to the cam device 301, so that the connection between the drive device and the transmission device is more stable.

[0039] In this embodiment, the second transmission component 303 includes a piston rod. One end of the piston rod is connected to the first transmission component 302 via a connector, and the other end of the piston rod is detachably connected to a striking component. The first transmission component 302 is connected to the piston rod via a connector, avoiding a direct connection between the piston rod and the transmission component. This optimizes the force-bearing structure of the piston rod, making it less prone to wear and detachment during use, thus extending the device's service life. One end of the connecting portion 401 is detachably connected to the second transmission component 303, and the other end of the connecting portion 401 is connected to the striking head 402. The connecting portion 401 has a hollow structure, while the striking head 402 has a solid conical structure. This structural design reduces the weight of the device, allowing the user to operate continuously for longer periods and reducing fatigue.

[0040] Specifically, the connector head is provided with a pin hole 3041. After the first bearing 3042 is installed onto the first transmission component 302, the pin 3041 passes through the pin hole 3041 on the connector head and the bearing hole on the first bearing 3042, thereby completing the hinged structure between the first transmission component 302 and the second transmission component 303. The connector head can be connected to the piston rod using common connection methods such as threaded connection or welding. A constraint member 50 is also provided at the end of the piston rod connected to the connecting part 401. The constraint member 50 restricts the direction of movement of the piston rod, allowing it to move only in a straight line.

[0041] Preferably, the striking part 401 is 4cm long and the striking head 402 is 2cm long. The striking head 402 is covered with a protective layer, which can play a protective and buffering role when the striking head 402 strikes and vibrates the ceramic liner. The shape of the connecting part 401 is adapted to the shape of the piston rod, and common structures such as rectangular or circular cross-sections can be selected.

[0042] In this embodiment, the frequency of the impact vibration when the removal device removes the ceramic liner of the hip joint prosthesis is usually between 10Hz and 100Hz, and the impact force of the impact head 402 on the ceramic liner of the hip joint prosthesis is stable in the range of 8N to 12N.

[0043] Preferably, the impact force on the ceramic liner of the hip joint prosthesis is kept constant at 10N.

[0044] In this embodiment, the second transmission component 303 reciprocates in the direction of power, performing piston motion.

[0045] Specifically, if the direction in which the connecting part 401 is set is "front", then the power movement direction of the motor device 201 is "forward and backward movement", and the second transmission member 303 performs reciprocating piston movement in the "forward and backward direction".

[0046] Preferably, the piston rod and the connecting part 401 can be connected by a threaded connection or by a snap-fit ​​connection.

[0047] In this embodiment, the extraction 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. Both the switch device 60 and the control device 70 are electrically connected to the battery 80.

[0048] Specifically, the control device 70 is a PCB assembly; the switch device 60 is equipped with adjustment positions and a lever, which can be used to adjust the striking frequency. Each adjustment position corresponds to a motor device 201 output frequency position, and each motor device 201 output frequency position corresponds to a target speed. The PCB assembly determines the PWM signal duty cycle compensation value of the motor device 201 based on the relationship between the driving voltage and the rated voltage, and in combination with the output frequency position information of the motor device 201, so as to adjust different striking frequencies. This can achieve precise control of the striking effect, making it easier for doctors to perform more precise operations during the operation without causing damage to the patient or the hip joint prosthesis.

[0049] In this embodiment, the extraction device is further provided with a housing 10, inside which a motor frame is provided, and a motor device 201 is mounted on the motor frame. The cam device 301, the control device 70, the battery 80, and the transmission assembly composed of the first transmission member 302 and the second transmission member 303 are all placed inside the housing 10, wherein a portion of the piston rod of the second transmission member 303 is placed outside the housing 10.

[0050] Specifically, the housing 10 is provided with a removable cover plate, which can be used to replace the battery 80 of the extraction device.

[0051] In this embodiment, the housing 10 also includes a handheld part for easy operation and use by doctors.

[0052] Specifically, the shell 10 is 20cm long, with the handhold part being 15cm high. A switch device 60 is located 3cm from the inner wall of the handhold part on the shell 10. This size setting makes it easy for doctors to grip, reducing hand pressure and tension, allowing doctors to perform surgical operations for extended periods. At the same time, the size setting that makes it easy for doctors to grip reduces instability caused by hand vibration during surgery, reducing surgical risks and making the surgery safer and more reliable.

[0053] In this embodiment, an indicator light (not shown in the figure) is provided on the outside of the housing 10. The indicator light is electrically connected to the control device 70 and can display the usage status and gear position. By turning the indicator light on or off, flashing, or changing its color, doctors can intuitively understand the working status and operation of the striking device and take appropriate measures in a timely manner, thereby improving work efficiency and ease of maintenance.

[0054] In this embodiment, the outer wall of the housing 10 is provided with several heat dissipation holes (not shown in the figure) on the side near the control device 70, which can make the heat dissipation path of the device shorter and prevent the heat generated by the device from not being discharged in time, thus preventing damage to the device itself.

[0055] In this embodiment, the removal device further includes a bracket 90, which includes several bracket legs 901. The bracket legs 901 are hinged to a connecting handle 902. The bottom of each bracket leg 901 is fitted with a positioning hole on the top edge of the hip joint metal cup. A telescopic tube 903 is slidably connected to the inner wall of each bracket leg 901. A locking member 904 abuts against the telescopic tube 903 through each bracket leg 901. The telescopic tube 903 can adjust the length of the bracket leg 901, allowing the bracket 90 to adapt to different sizes of hip joint cups. Specifically, the bracket 90 can be a two-legged bracket 90 or a three-legged bracket 90, and the locking member 904 is an adjusting screw.

[0056] Preferably, the bracket 90 is a bipod bracket 90.

[0057] In this embodiment, the bottom of the support leg 901 is provided with an anti-slip pad, which allows the support 90 to 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 percussion operation.

[0058] In this embodiment, the working principle of the support 90 is as follows: the support legs 901 of the bipedal support 90 are hinged to the connecting handle 902, so that the support legs 901 of the bipedal support 90 can be opened and closed to a certain extent. The support legs 901 are provided with telescopic tubes 903 inside, which can be used to adjust the length of the support legs 901. The two support legs 901 are provided with adjusting screws on the outside. The adjusting screws are inserted through the support legs 901. The doctor can operate the adjusting screws until the adjusting screws abut against the telescopic tubes 903, so that the adjusted length of the support legs 901 can be fixed.

[0059] The principle of use in this embodiment is as follows: the bracket 90 is installed on the mounting hole of the hip joint metal cup, and the bracket 90 is adjusted to fit the size of the hip joint metal cup to be operated.

[0060] When the battery 80 has sufficient power, the doctor can turn on the switch device 60 and adjust the desired striking level. The PCB assembly determines the duty cycle compensation value of the PWM signal of the motor device 201 based on the relationship between the adjusted level, the driving voltage, and the rated voltage, and in conjunction with the level information of the motor device 201, so that the level of the motor device 201 matches the desired striking level. At this time, the indicator light displays the striking level information of the removal device so that the doctor can confirm the status of the removal device. Then, when the motor works, it drives the cam device 301 to move. The first transmission device connected to the cam device 301 transmits 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 back-and-forth reciprocating motion, thereby driving the striking device to strike the ceramic liner of the hip joint prosthesis, so that the ceramic liner can be removed.

[0061] When the battery 80 is low on power, the doctor can remove the base plate of the handpiece to replace the battery 80, so that the removal device can be used at any time.

[0062] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An electromechanical device for removing ceramic liners from a hip joint prosthesis, comprising: A motor device is electrically connected to a battery, and the output end of the motor device is connected to a cam device. The cam device is connected to a first transmission component, and the first transmission component is hinged to a second transmission component via a connector. The connector includes a pin and a first bearing. The first bearing is disposed at one end where the first transmission component and the second transmission component are connected to each other. The pin is inserted into the bearing hole of the first bearing. The other end of the second transmission component is detachably connected to a striking component. A control device, electrically connected to the motor, and also electrically connected to a switching device, both the control device and the switching device being electrically connected to the battery; and The bracket includes several bracket legs, which are hinged to a connecting handle. The bottom of each bracket leg is adapted to the size of a positioning hole on the top edge of the hip joint metal cup. A telescopic tube is slidably connected to the inner wall of the bracket's leg tube, and a locking member abuts against the telescopic tube passes through the leg tube.

2. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 1, characterized in that, The bottom of the foot tube is equipped with an anti-slip pad.

3. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 1, characterized in that, The second transmission component includes a piston rod, one end of which is connected to the first transmission component via a connector, and the other end of which is detachably connected to the striking component.

4. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 1, characterized in that, It also includes a reinforcing component, which is located inside the first transmission component.

5. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 1, characterized in that, The striking component includes a connecting part and a striking head. One end of the connecting part is detachably connected to the second transmission component, and the other end of the connecting part is connected to the striking head.

6. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 5, characterized in that, The connecting part has a hollow structure, while the striking head has a solid conical structure.

7. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 1, characterized in that, It also includes a housing, in which a motor frame and the control device are provided, the motor device is mounted on the motor frame, and a switch device is provided on the outer wall of the housing.

8. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 7, characterized in that, An indicator light is provided on the outside of the housing. The indicator light is electrically connected to the control device and can display the usage status.

9. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 7, characterized in that, The housing also includes a handheld part.

10. The electromechanical hip joint prosthesis ceramic liner removal device as described in claim 7, characterized in that, The outer wall of the housing has several heat dissipation holes on the side near the control device.

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