CN111839840B

CN111839840B - Electronic force measuring device for soft tissue balance

Info

Publication number: CN111839840B
Application number: CN202010723279.1A
Authority: CN
Inventors: 王飞; 解凤宝; 史春宝; 石守娟; 王海静; 郝孟娟; 吕昌禹
Original assignee: Beijing Chunlizhengda Medical Instruments Co Ltd
Current assignee: Third Hospital of Hebei Medical University; Beijing Chunlizhengda Medical Instruments Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-07-30
Anticipated expiration: 2040-07-24
Also published as: CN111839840A

Abstract

The application relates to the field of knee joint pressure detection, in particular to an electronic force measuring device for soft tissue balance. The utility model provides an electron force measuring device for soft tissue is balanced, includes the pressure pad, be located the pressure sensing module that is used for detecting both sides face pressure in the pressure pad, be used for the transmission line of output pressure sensing module detected signal to and accomodate the receipts line module of transmission line: the pressure pad is including storing up line portion, it is provided with the outlet to store up line portion, receive the line module including being located the plane spiral spring that stores up line portion, the one end of transmission line is connected with pressure sensing module, and after the transmission line wound the at least round of plane spiral spring, the other end of transmission line stretches out from the outlet, the one end that the outlet was stretched out to the transmission line is connected with first joint. After the electronic force measuring device is placed in the knee joint, the transmission line is pulled outwards to connect the transmission line with external equipment. After the use, the transmission line is automatically collected into the line storage part under the action of the flat spiral spring.

Description

Electronic force measuring device for soft tissue balance

Technical Field

The application relates to the field of knee joint pressure detection, in particular to an electronic force measuring device for soft tissue balance.

Background

As the population becomes increasingly older, the number of patients with knee osteoarthritis is on an increasing trend. In the aspect of knee joint treatment, total knee joint replacement is one of the more successful surgical methods for treating knee joint diseases at present, a femoral prosthesis is used for replacing the surface of a femur in the surgery, a tibial prosthesis and a tibial gasket are used for replacing the surface of a tibia, and the contact surface between the femoral prosthesis and the tibial gasket forms the knee joint plane after the surgery. The total knee joint replacement can relieve the knee joint pain of the patient and greatly improve the life quality of the patient. However, the difficulty of the total knee replacement operation is self evident as a complicated joint of the human body. In addition to accurate osteotomy, proper ligament release and soft tissue balance are critical to the operation, so special attention must be paid to the release of soft tissue around the tibial plateau during the operation to ensure that the knee joint has proper tightness and the lateral pressures are as equal as possible. However, in the current knee joint replacement surgery process, the method for judging whether the implanted prosthesis meets the soft tissue balance by a doctor only depends on experience and hand feeling, which causes the culture period of the total knee joint replacement surgery doctor to be overlong and brings unstable factors and certain risks to the surgery.

The electronic force measuring device for detecting pressure in the current artificial knee joint replacement comprises a pressure acquisition device and a signal receiving and displaying device, wherein the pressure acquisition device processes a pressure signal and then is connected with an external device through a transmission line to display a pressure value. When the transmission line is used for placing the electronic force measuring device into the knee joint in the operation process, the transmission line is generally folded for multiple times and then tied tightly, so that the interference of the transmission line to an operating doctor in the operation process is reduced. After the electronic force measuring device is placed in place, the transmission line is loosely bound, so that the transmission line has enough length to be connected with external equipment. The transmission line can still be hung on the electronic force measuring device after being folded for many times and then tied tightly, and the operation of an operator can be influenced.

Disclosure of Invention

In order to avoid interference of a transmission line to a surgeon in an operation process, the application provides the electronic force measuring device for soft tissue balance.

The application provides an electron measuring force device for soft tissue is balanced, adopts following technical scheme:

the utility model provides an electron force measuring device for soft tissue is balanced, includes the pressure pad, be located the pressure sensing module that is used for detecting both sides face pressure in the pressure pad, be used for the transmission line of output pressure sensing module detected signal to and accomodate the receipts line module of transmission line: the pressure pad is including storing up line portion, it is provided with the outlet to store up line portion, receive the line module including being located the plane spiral spring that stores up line portion, the one end of transmission line is connected with pressure sensing module, and after the transmission line wound the at least round of plane spiral spring, the other end of transmission line stretches out from the outlet, the one end that the outlet was stretched out to the transmission line is connected with first joint.

Through adopting above-mentioned technical scheme, the pressure of pressure sensing module detection pressure pad both sides in through the pressure pad is with the pressure signal transmission of detecting to external equipment through the transmission line. The transmission line is usually stored in the line storage part, so that the interference to the operating doctor in the operation process can be avoided. When the electronic force measuring device is placed in the knee joint, the transmission line is pulled outwards to connect the transmission line with the external equipment, and the planar volute spiral spring is stressed and compressed. After the use, the transmission line is automatically collected into the line storage part under the action of the flat spiral spring.

Preferably, the wire collecting module further comprises a positioning column located in the wire storage part, the positioning column is fixedly connected with the wire storage part, and the plane spiral spring is sleeved on the positioning column.

Through adopting above-mentioned technical scheme, set up the spiral spring in plane on the reference column for spiral spring in plane is fixed a position by the reference column and can not move about at will.

Preferably, the outlet position in the wire storage part is provided with two articulated splint, and the articulated department of two splint is provided with the torsional spring, the transmission line passes between the tight side of clamp from two splint.

By adopting the technical scheme, after the electronic force measuring device is arranged in the knee joint, the separation sides of the two splints are pressed, so that the transmission line is loosened, and at the moment, the transmission line is pulled out from the line storage part. After the transmission line is pulled out for a sufficient length, the clamping plate is loosened, so that the transmission line is clamped again by the clamping plate.

Preferably, the pressure pad is in a sheet shape, the end, far away from the shell, of the pressure pad is provided with a yielding groove, and the positions, close to the two ends, of the surface of the pressure pad are respectively provided with a positioning hole.

Through adopting above-mentioned technical scheme, insert the knee joint with the pressure pad when using this product in, the recess of stepping down is used for stepping down for the ligament, makes the pressure pad can fully insert the knee joint. The positioning hole is used for being matched and positioned with the positioning block on the clearance measuring pad, and the clearance measuring pads with different thicknesses can be replaced until the pressure value of the knee joint reaches the appropriate range.

Preferably, the display device further comprises a display, the display device comprises a shell, a signal processing module positioned in the shell, a second connector used for connecting the first connector, an electronic display screen arranged on the outer side of the shell, and an on-off module used for controlling the on-off of the electronic display screen and the signal processing module, and the on-off module comprises an on-off control element and an on-off switch element matched with the on-off control element.

Through adopting above-mentioned technical scheme, display and pressure pad form a whole through first joint and second joint cooperation after connecting. When the pressure pad is inserted into the knee joint for detection, the knee joint pressure information is directly displayed on the electronic display screen, an operator can accurately and timely read the knee joint pressure data, the operator does not need an assistant to check and report again, the operator can conveniently test the soft tissue and stretch and evaluate the balance of the inner side and the outer side, and the use efficiency is improved. The on-off of the on-off switch element is controlled by the on-off control element, and when the electronic display screen and the signal processing module are not needed to be used, the electronic display screen and the signal processing module are powered off to reduce energy loss of a power supply.

Preferably, the power on/off control element comprises a flexible connecting piece fixedly connected with the shell and a magnet fixed on the flexible connecting piece; the on-off switch element comprises a fixed conductive plate fixedly connected with the shell, a movable conductive plate rotatably connected with the shell and a tension spring driving the movable conductive plate to move towards the direction of the fixed conductive plate, and the movable conductive plate is made of magnetizable materials.

Through adopting above-mentioned technical scheme, connect magnet through flexible connectors, magnet can be in the within range free activity that flexible connectors restricted. When magnet was located one side that the casing was close to the activity current conducting plate, the magnetic force of magnet drove the motion of activity current conducting plate to the direction of keeping away from fixed current conducting plate, and the separation of activity current conducting plate and fixed current conducting plate, circuit disconnection this moment, and signal processing module and electronic display screen are out of work. When magnet was located the opposite side of casing, the laminating was on fixed current conducting plate on the effort of extension spring to the activity current conducting plate, and the circuit switched on this moment, and signal processing module and electronic display screen work. Meanwhile, the magnetic switch can be repeatedly used, and after the magnetic switch is used, the open circuit is realized through the position switching of the magnet to wait for the next use.

Preferably, the flexible connecting piece extends into the shell from one end of the shell back to the pressure pad, and one end of the flexible connecting piece extending into the shell is bonded with the inner side wall of the shell.

Through adopting above-mentioned technical scheme, stretch into flexible connectors one end in the casing for flexible connectors and casing zonulae occludens. And the surface of the shell is sealed by gluing to isolate the internal and external spaces of the shell. When cleaning and disinfecting, only the outer surfaces of the shell, the flexible connecting piece and the pressure pad need to be processed.

Preferably, the power on/off control element comprises a flexible connecting piece fixedly connected with the shell and a magnet fixed on the flexible connecting piece; the on-off switch element comprises a magnetic sensor and an electric switch, the magnetic sensor is close to the side wall of one side of the shell, and a metal shielding plate is arranged on the inner side wall, far away from the magnetic sensor, of the shell.

Through adopting above-mentioned technical scheme, when magnet was located the casing and is close to one side of magnetic sensor, the magnetic sensor detects magnetic field intensity and is greater than the control electric switch outage behind the setting value. When the magnet is separated from the shell at the position, the magnetic field intensity detected by the magnetic sensor is smaller than a set value, and the electric switch is in a power-on state. When the magnet is positioned on one side of the shell close to the metal shielding plate, the metal shielding plate shields the magnetic field, so that the magnetic field intensity detected by the magnetic sensor is smaller than a set value.

Preferably, the power-on and power-off control element comprises an inserting plate and a magnet fixed at one end of the inserting plate, a slot is formed in each of the positions, close to the two side edges, of one side, back to the pressure pad, of the shell, and the slots are formed in the inner wall of the shell; the on-off switch element comprises a fixed conductive plate fixedly connected with the shell, a movable conductive plate rotatably connected with the shell and a tension spring driving the movable conductive plate to move towards the direction of the fixed conductive plate, and the movable conductive plate is made of magnetizable materials.

By adopting the technical scheme, the power-on and power-off control element is arranged into the plug board and the magnet connected to the plug board, so that the power-on and power-off control can be realized by plugging and unplugging the plug board.

Preferably, a grabbing plate is formed on the side surface of the inserting plate, which is far away from one end of the magnet.

Through adopting above-mentioned technical scheme, set up and grab the board and make things convenient for the operation picture peg.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the transmission line is normally stored in the line storage part, so that the interference to an operating doctor in the operation process can be avoided; when the electronic force measuring device is placed in the knee joint, the transmission line is pulled outwards to be connected with external equipment, and the planar volute spiral spring is stressed and compressed; after the use, the transmission line is automatically collected into the line storage part under the action of the flat spiral spring.

2. Display and pressure pad connect the cooperation through first joint and second and form a whole after connecting, detect time measuring in the pressure pad inserts the knee joint, knee joint pressure information direct display is on electronic display screen, and the art person can accurately and in time read knee joint pressure data, need not the assistant and looks over and reports again, and the art person of being convenient for tests the soft tissue and leads and aassessment inside and outside balance, promotes the availability factor.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of an electronic force measuring device;

FIG. 2 is a schematic view of an embodiment of an electronic force measuring device in cooperation with a gap measuring pad;

FIG. 3 is a schematic view of an embodiment of an electronic force measuring device with a hidden wire storage portion on one side;

FIG. 4 is an enlarged view at A in FIG. 3;

FIG. 5 is a schematic structural view of a second embodiment of an electronic force measuring device;

FIG. 6 is a schematic cross-sectional view of a second embodiment of an electronic force measuring device with the display closed;

FIG. 7 is a schematic cross-sectional view of an open state of a display in a second embodiment of an electronic force measuring device;

FIG. 8 is a schematic cross-sectional view of a third embodiment of an electronic force measuring device with the display closed;

FIG. 9 is a schematic cross-sectional view of a third embodiment of an electronic force measuring device with the display in an open state;

fig. 10 is a schematic layout of a display in a fourth embodiment of an electronic force measuring device.

Description of reference numerals: 1. a pressure pad; 2. a transmission line; 3. a wire take-up module; 4. a wire storage part; 5. an outlet; 6. a yielding groove; 7. positioning holes; 8. a positioning column; 9. a flat spiral spring; 10. a splint; 11. a torsion spring; 12. a first joint; 13. a display; 14. a housing; 15. a second joint; 16. an electronic display screen; 17. switching on and off the electric module; 18. a power on and power off control element; 19. an on-off switch element; 20. a flexible connector; 21. a magnet; 22. fixing the conductive plate; 23. a movable conductive plate; 24. a tension spring; 25. a magnetic sensor; 26. an electric switch; 27. a metal shielding plate; 28. inserting plates; 29. a slot; 30. and (5) grabbing the plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-10.

The embodiment of the application discloses an electronic force measuring device for soft tissue balance.

Example one

As shown in fig. 1, the electronic force measuring device includes a pressure pad 1, a pressure sensing module for detecting pressures on two sides, a transmission line 2 for outputting a detection signal of the pressure sensing module, and a wire winding module 3 for accommodating the transmission line 2 are installed in the pressure pad 1.

As shown in fig. 1 and 2, the pressure pad 1 is sheet-shaped, a wire storage portion 4 is disposed at one end of the pressure pad 1, a wire outlet 5 is disposed at the wire storage portion 4, and a relief groove 6 is formed at one end of the pressure pad 1 away from the wire storage portion 4. When the product is used, the pressure pad 1 is inserted into the knee joint, and the abdicating groove 6 is used for abdicating the ligament, so that the pressure pad 1 can be fully inserted into the knee joint. The positions of the surface of the pressure pad 1, which are close to the left end and the right end, are respectively provided with a positioning hole 7 for matching and positioning with a positioning block on the gap measuring pad, and the gap measuring pads with different thicknesses can be replaced until the pressure value of the knee joint reaches the proper range.

As shown in fig. 3 and 4, the wire rewinding module 3 includes a positioning column 8 in the fixed wire accumulating portion 4, and a spiral planar spring 9 sleeved on the positioning column 8, and an inner end of the spiral planar spring 9 is fixedly connected to the fixing column. One end of the transmission line 2 is fixedly connected with the pressure sensing module, and the transmission line 2 penetrates out of the outlet 5 after a plurality of circles of the outer ring of the flat spiral spring 9. Two hinged clamping plates 10 are arranged at the positions of the wire outlets 5 in the wire storage part 4, a torsion spring 11 is arranged at the hinged position of the two clamping plates 10, one side of the torsion spring 11 driving the two clamping plates 10 to move in the opposite direction is a clamping side, the other side of the torsion spring 11 is a separating side, and the transmission line 2 penetrates through the clamping side of the two clamping plates 10. One end of the transmission line 2 extending out of the outlet 5 is fixedly connected with a first connector 12, and the transmission line 2 cannot be completely retracted into the pressure pad 1 through the first connector 12.

After the electronic force measuring device is placed in the knee joint, the separated sides of the two splints 10 are pressed, so that the transmission line 2 is loosened, and at the moment, the transmission line 2 is pulled out from the line storage part 4. After the transmission line 2 has been pulled out for a sufficient length, the clamping plate 10 is released, so that the transmission line 2 is clamped again by the clamping plate 10. The transmission line 2 is connected with a computer through the first connector 12, the detection signal of the pressure sensing module is transmitted to the computer, and the pressure value is displayed through the computer.

Example two

As shown in fig. 5, the electronic force measuring device in the present embodiment is different from the first embodiment in that it further includes a display 13. The display 13 comprises a housing 14, a signal processing module located in the housing 14, a second connector 15 for connecting the first connector 12, an electronic display screen 16 mounted on the outer side of the housing 14, and an on-off module 17 for controlling the on-off of the electronic display screen 16 and the signal processing module. The pressure sensing module detects the pressure born by the end faces at the two sides of the pressure pad 1 and transmits a pressure signal to the signal processing module, and the signal processing module receives the pressure signal and then displays the pressure information on the electronic display screen 16.

Connect grafting through first joint 12 and second joint 15 and combine casing 14 and pressure pad 1 as a whole, when pressure pad 1 inserts the knee joint in detecting, knee joint pressure information direct display is on electronic display screen 16, and the art person can accurately and in time read knee joint pressure data, need not the assistant and looks over and reports again, and the art person of being convenient for tests that the soft tissue leads to stretch and aassessment inside and outside is balanced, promotes the availability factor.

As shown in fig. 6 and 7, the on-off module 17 includes an on-off control element 18 and an on-off switch element 19 that cooperates with the on-off control element 18. The power on/off control element 18 comprises a flexible connection member 20 and a magnet 21 fixed on the flexible connection member 20, and the flexible connection member 20 can be an adhesive tape. One end of the flexible connecting element 20 projects into the housing 14 on the side of the housing 14 facing away from the pressure cushion 1. One end of the flexible connecting piece 20 extending into the shell 14 is bonded with the inner side wall of the shell 14, and the magnet 21 is fixed at the other end of the flexible connecting piece 20. The on-off switch comprises a fixed conductive plate 22 fixedly connected with the shell 14, a movable conductive plate 23 rotatably connected with the shell 14 and a tension spring 24 driving the movable conductive plate 23 to move towards the direction attached to the fixed conductive plate 22, wherein the movable conductive plate 23 is made of magnetizable materials.

When the magnet 21 is located on one side of the housing 14 close to the movable conductive plate 23, the magnetic force of the magnet 21 drives the movable conductive plate 23 to move in a direction away from the fixed conductive plate 22, the movable conductive plate 23 is separated from the fixed conductive plate 22, the circuit is disconnected, and the signal processing module and the electronic display screen 16 do not work. When the magnet 21 is located at the other side of the housing 14, the movable conductive plate 23 is attached to the fixed conductive plate 22 under the action of the tension spring 24, and the circuit is conducted, so that the signal processing module and the electronic display screen 16 operate.

EXAMPLE III

As shown in fig. 8 and 9, the electronic force measuring device in the present embodiment is different from the second embodiment in that the on-off switch element 19 includes a magnetic sensor 25 and an electric switch 26, and the magnetic sensor 25 is adjacent to one side wall of the housing 14. A metal shield plate 27 is provided on the inner side wall of the housing 14 remote from the magnetic sensor 25.

When the magnet 21 is located on the side of the housing 14 close to the magnetic sensor 25, the magnetic sensor 25 detects that the magnetic field strength is greater than a set value, and then controls the power switch 26 to be powered off. When the magnet 21 is located on the side of the housing 14 close to the metal shielding plate 27, the magnetic field is shielded by the metal shielding plate 27 so that the magnetic field intensity detected by the magnetic sensor 25 is smaller than a set value at this time, and the electric switch 26 is in the energized state.

Example four

As shown in fig. 10, the electronic force measuring module in this embodiment differs from the first embodiment in that the power on/off control element 18 includes a card 28 and a magnet 21 fixed to one end of the card 28. The side of the shell 14, which faces away from the pressure pad 1, near the two side edges is formed with a slot 29, and the slot 29 is formed in the inner wall of the shell 14 and is not communicated with the space inside the shell 14. The side of the insert plate 28 remote from the magnet 21 is formed with a catch plate 30 to facilitate handling of the insert plate 28.

When the plug board 28 is inserted into the slot 29 on the side of the housing 14 close to the movable conductive plate 23, the magnetic force of the magnet 21 drives the movable conductive plate 23 to move away from the fixed conductive plate 22, the movable conductive plate 23 is separated from the fixed conductive plate 22, and at this time, the circuit is disconnected, and the signal processing module and the electronic display screen 16 do not work. When the plug board 28 is inserted into the slot 29 of the housing 14 far from the movable conductive board 23, the movable conductive board 23 is attached to the fixed conductive board 22 under the action of the tension spring 24, and the circuit is conducted, so that the signal processing module and the electronic display screen 16 work.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. An electronic force measuring device for soft tissue balance is characterized in that: including pressure pad (1), be located pressure sensing module that is used for detecting both sides face pressure in pressure pad (1), be used for outputting transmission line (2) that pressure sensing module detected the signal to and accomodate receipts line module (3) of transmission line (2): the pressure pad (1) comprises a wire storage part (4), a wire outlet (5) is formed in the wire storage part (4), the wire take-up module (3) comprises a plane spiral spring (9) located in the wire storage part (4), one end of the transmission line (2) is connected with the pressure sensing module, after the transmission line (2) winds the plane spiral spring (9) for at least one circle, the other end of the transmission line (2) extends out of the wire outlet (5), and one end, extending out of the wire outlet (5), of the transmission line (2) is connected with a first connector (12); the display device comprises a display (13), the display (13) comprises a shell (14), a signal processing module positioned in the shell (14), a second connector (15) used for connecting the first connector (12), an electronic display screen (16) arranged on the outer side of the shell (14) and an on-off module (17) used for controlling the on-off of the electronic display screen (16) and the signal processing module, and the on-off module (17) comprises an on-off control element (18) and an on-off switch element (19) matched with the on-off control element (18); the power on-off control element (18) comprises a flexible connecting piece (20) and a magnet (21) fixed on the flexible connecting piece (20), and one end of the flexible connecting piece (20) extends into the shell (14) at one side of the shell (14) back to the pressure pad (1); one end of the flexible connecting piece (20) extending into the shell (14) is bonded with the inner side wall of the shell (14), and the magnet (21) is fixed at the other end of the flexible connecting piece (20); the on-off switch element (19) comprises a fixed conductive plate (22) fixedly connected with the shell (14), a movable conductive plate (23) rotatably connected with the shell (14) and a tension spring (24) driving the movable conductive plate (23) to move towards the direction attached to the fixed conductive plate (22), wherein the movable conductive plate (23) is made of magnetizable materials.

2. An electronic force-measuring device for soft tissue balancing according to claim 1, wherein: receive line module (3) and still including reference column (8) that are located storage line portion (4), reference column (8) and storage line portion (4) fixed connection, flat spiral spring (9) cover is established on reference column (8).

3. An electronic force-measuring device for soft tissue balancing according to claim 1, wherein: the wire outlet (5) in the wire storage part (4) is provided with two hinged clamping plates (10), the hinged part of the two clamping plates (10) is provided with a torsion spring (11), and the transmission line (2) penetrates through the clamping side of the two clamping plates (10).

4. An electronic force-measuring device for soft tissue balancing according to claim 1, wherein: the pressure pad (1) is in a sheet shape, the end, away from the shell (14), of the pressure pad (1) is provided with a yielding groove (6), and the positions, close to the two ends, of the surface of the pressure pad (1) are respectively provided with a positioning hole (7).