Fixing device and navigation system

Abstract

The utility model discloses a fixing device and a navigation system, comprising a tracer, a connecting device and a spinous process clamp, the connecting device comprising a rotating connecting rod and an angle adjustment mechanism connected to the rotating connecting rod, the spinous process clamp is connected to the rotating connecting rod, and the angle adjustment mechanism is connected to the tracer. The utility model performs coarse adjustment and positioning of the angle between the tracer and the spinous process clamp through the coarse adjustment mechanism, and then performs fine adjustment and positioning of the angle between the tracer and the spinous process clamp through the angle adjustment mechanism, thereby achieving the effect of accurately controlling the tracer angle, and the utility model has a simple structure and is easy to operate, which greatly facilitates the operation of doctors during surgery.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment and relates to a fixing device and a navigation system. Background Art

[0002] Spinal navigation usually obtains patient images before and during surgery, and performs image-guided surgery after intraoperative registration. This process requires tracking with a tracer. Currently, the fixed structure used to fix the tracer is usually rigidly connected to the tracer, and the doctor cannot adjust the angle of the tracer 1. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a fixing device and a navigation system.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fixing device, including a tracer, a connecting device and a spinous process clamp, the connecting device includes a rotating connecting rod and an angle adjustment mechanism connected to the rotating connecting rod, the spinous process clamp is connected to the rotating connecting rod, and the angle adjustment mechanism is connected to the tracer.

[0005] Furthermore, the angle adjustment mechanism includes a fixed structure and a movable structure, the fixed structure is connected to the rotating connecting rod, the movable structure is connected to the tracer, the fixed structure is provided with a plurality of tooth grooves, the movable structure is provided with a tooth shape matching the tooth grooves, and the fixed structure and the movable structure are movably connected.

[0006] Furthermore, the connecting device also includes a coarse adjustment mechanism, which is respectively connected to the rotating connecting rod and the spinous process clamp.

[0007] Furthermore, the fixed structure includes an inner ring and an outer ring that are coaxially arranged, and a plurality of teeth are distributed on the end surface of the outer ring. The movable structure includes screws, compression springs and a pitch connecting piece. The pitch connecting piece is fixedly connected to the tracer, and a plurality of teeth are distributed on the end surface of the pitch connecting piece. The screws penetrate the pitch connecting piece and extend to the inner ring, and the compression spring is connected between the screws and the pitch connecting piece.

[0008] Furthermore, the coarse adjustment mechanism includes a coarse fixed structure and a coarse movable structure, the coarse movable structure is connected to the rotating connecting rod, the coarse fixed structure is connected to the spinous process clamp, the coarse fixed structure is provided with a plurality of tooth grooves, the coarse movable structure is provided with a tooth shape matching the tooth grooves, and the coarse fixed structure and the coarse movable structure are movably connected.

[0009] Furthermore, a plurality of tooth shapes are provided, the plurality of tooth shapes are distributed circumferentially, and the angle between adjacent tooth shapes is a fixed value.

[0010] Furthermore, the spinous process clamp includes a clamp, a main fork and a secondary fork, the main fork is connected to the rotating connecting rod, the main fork and the secondary fork are rotationally connected through a rotating rod, the clamp connects the main fork and the secondary fork, the clamp, the rotating rod, the main fork and the secondary fork constitute a lever structure, and the main fork and the secondary fork are clamped or loosened by the clamp.

[0011] Furthermore, the main fork and the secondary fork are respectively provided with weight-reducing grooves.

[0012] Furthermore, the main fork is provided with a first protruding tooth, the auxiliary fork is provided with a second protruding tooth, the first protruding tooth and the second protruding tooth are opposite to each other, and the first protruding tooth and the second protruding tooth are staggered.

[0013] A navigation system comprises the fixing device.

[0014] In summary, the utility model is beneficial in that:

[0015] The utility model roughly adjusts and positions the angle between the tracer and the spinous process clamp through the coarse adjustment mechanism, and then finely adjusts and positions the angle between the tracer and the spinous process clamp through the angle adjustment mechanism, thereby achieving the effect of accurately controlling the tracer angle, and has a simple structure and is easy to operate, which greatly facilitates the doctor's operation during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the fixing device of the utility model.

[0017] Figure 2 It is a schematic diagram of an axonometric view of the fixing device of the present utility model.

[0018] Figure 3 for Figure 1 Half-section diagram.

[0019] Figure 4 It is an exploded schematic diagram of the connecting device and the spinous process clamp in the utility model.

[0020] Symbols in the figure: tracer 1, connecting device 2, spinous process clamp 3, fixing block 11, locking piece 12, rotating connecting rod 21, angle adjustment mechanism 22, coarse adjustment mechanism 23, screw 221, compression spring 222, pitch connecting piece 223, tooth shape 224, outer ring 225, tooth groove 226, inner ring 227, clamp 31, main fork 32, secondary fork 33, first motion input end 321, first motion output end 322, second motion input end 331, second motion output end 332. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0023] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0024] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0025] Embodiment 1:

[0026] like Figure 1-Figure 4 As shown, a fixing device comprises a tracer 1, a connecting device 2 and a spinous process clamp 3. The connecting device 2 comprises a rotating connecting rod 21 and an angle adjustment mechanism 22 connected to the rotating connecting rod 21. The spinous process clamp 3 is connected to the rotating connecting rod 21, and the angle adjustment mechanism 22 is connected to the tracer 1.

[0027] The appearance and structure of the tracer 1 are set according to industry standards and will not be elaborated here. A fixed block 11 is fixed on the tracer 1. The fixed block 11 is provided with a fixing hole (not marked in the figure). A locking piece 12 is provided in the fixing hole. The locking piece 12 passes through the fixing hole to connect the fixed block 11 with the angle adjustment mechanism 22, thereby connecting the tracer 1 and the angle adjustment mechanism 22.

[0028] The angle adjustment mechanism 22 includes a fixed structure and a movable structure. The fixed structure is connected to the rotating connecting rod 21, and the movable structure is connected to the tracer 1. The fixed structure is provided with a plurality of tooth grooves 226, and the movable structure is provided with a tooth shape 224 matching the tooth grooves 226. The tooth grooves 226 are snapped into the tooth shape 224, so that the fixed structure and the movable structure are movably connected. The movable structure is rotated to make it rotate axially, and the matching position of the tooth grooves 226 and the tooth shape 224 is adjusted, thereby adjusting the angle between the fixed structure and the tracer 1.

[0029] like Figure 1 As shown, the angle between the fixed structure and the tracer 1 is set to angle C, the transverse axis of the fixed structure is set to B, B is the fixed axis, the central axis of the tracer 1 is set to A, A is also the central axis of the movable structure, A is the movable axis, and the angle between A and B is C. When the movable structure rotates, A rotates, thereby causing C to change, thereby effectively adjusting the angle of the tracer 1, and the spinous process clamp 3 is connected to the rotating connecting rod 21, and the change of the angle C is also the change of the angle between the spinous process clamp 3 and the tracer 2.

[0030] like Figure 1 As shown, a plurality of tooth shapes 224 are distributed circumferentially, and the angles of adjacent tooth shapes 224 are fixed values. The adjustment angle of the tracer 1 is determined according to the number of adjusted tooth shapes.

[0031] The fixed structure includes an inner ring 227 and an outer ring 225 which are coaxially arranged. The length of the inner ring 227 is greater than that of the outer ring 225. A plurality of tooth grooves 226 are circumferentially distributed on the end surface of the outer ring 225. The movable structure includes a screw 221, a compression spring 222 and a pitch connection piece 223. The pitch connection piece 223 is fixedly connected to the tracer 1. The locking piece 12 passes through the fixing hole to connect the fixing block 11 to the pitch connection piece 223. A plurality of tooth shapes 224 are circumferentially distributed on the end surface of the pitch connection piece 223. The screw 221 passes through the pitch connection piece 223 and extends to the inner ring 227. The compression spring 222 is connected to the pitch connection piece 223. Between the screw 221 and the pitch connector 223, when it is necessary to adjust the angle of the tracer 1, loosen the screw 221, and the pitch connector 223 and the outer ring 225 are out of the tight fit state. At this time, rotate the tracer 1 to change the matching position of the tooth shape 224 and the tooth groove 226 until the tracer 1 is adjusted to the set position. At this time, tighten the screw 221 to tighten the pitch connector 223 and the inner ring 227. At the same time, the compression spring 222 compresses the pitch connector 223 and the outer ring 225 to tighten them, thereby realizing the tight connection between the tracer 1 and the angle adjustment mechanism 22. At this time, the tracer 1 is at the set angle.

[0032] The connecting device 2 also includes a coarse adjustment mechanism 23, which is respectively connected to the rotating connecting rod 21 and the spinous process clamp 3. The angle of the tracer 1 is roughly adjusted and positioned through the coarse adjustment mechanism 23, and then the angle of the tracer 1 is finely adjusted and positioned through the angle adjustment mechanism 22.

[0033] The coarse adjustment mechanism 23 includes a coarse fixed structure and a coarse movable structure. The coarse movable structure is connected to the rotating connecting rod 21, and the coarse fixed structure is connected to the spinous process clamp 3. The coarse fixed structure is provided with a plurality of tooth grooves 226, and the coarse movable structure is provided with a tooth shape 224 matching the tooth grooves 226. The tooth grooves 226 are buckled into the tooth shape 224, so that the coarse fixed structure and the coarse movable structure are movably connected. The coarse movable structure is rotated to make it rotate axially, and the matching position of the tooth grooves 226 and the tooth shape 224 is adjusted, thereby adjusting the angle between the tracer 1 and the spinous process clamp 3.

[0034] The coarse fixed structure and the coarse movable structure are similar to the structures of the fixed structure and the movable structure, and are not described in detail here.

[0035] In this embodiment, the coarse adjustment mechanism 23 is used to roughly adjust and position the angle between the tracer 1 and the spinous process clamp 3, and then the angle adjustment mechanism 22 is used to finely adjust and position the angle between the tracer 1 and the spinous process clamp 3, thereby achieving the effect of accurately controlling the angle of the tracer 1.

[0036] The spinous process clamp 3 includes a clamp 31, a main fork 32 and a secondary fork 33. The main fork 32 is connected to the rotating connecting rod 21. The main fork 32 and the secondary fork 33 are rotatably connected through a rotating rod. The clamp 31 connects the main fork 32 and the secondary fork 33. The clamp 31, the rotating rod, the main fork 32 and the secondary fork 33 constitute a lever structure. The main fork 32 and the secondary fork 33 are clamped or loosened by the clamp 31.

[0037] Taking the rotating rod as an example, the main fork 32 is divided into a first motion input end 321 and a first motion output end 322, and the secondary fork 33 is divided into a second motion input end 331 and a second motion output end 332. The first motion input end 321 is connected to the rotating connecting rod 21, and the first motion output end 322 is provided with a first protruding tooth (not marked in the figure), and the second motion output end 332 is provided with a second protruding tooth (not marked in the figure). The first protruding tooth and the second protruding tooth are opposite to each other, thereby enhancing the clamping ability of the spinous process clamp 3.

[0038] Preferably, the first protruding teeth and the second protruding teeth are staggered to further enhance the clamping ability of the spinous process clamp 3 .

[0039] Preferably, the main fork 32 and the secondary fork 33 are respectively provided with a weight-reducing groove (not marked in the figure).

[0040] The clamp 31 passes through the main fork 32 and is threadedly connected to the main fork 32. The end of the clamp 31 is slidably connected to the secondary fork 33. Specifically, the clamp 31 passes through the first motion input end 321 and is threadedly connected to the first motion input end 321. The second motion input end 331 is provided with a slide groove 333. The end of the clamp 31 is slidably connected to the slide groove 333. A handle (not marked in the figure) is fixed to the head end of the clamp 31.

[0041] The implementation process of the spinous process clamp 3 is as follows: when the tracer 1 is clamped by the spinous process clamp 3, the spinous process clamp 3 moves to the position of the device to be clamped, and the handle is turned to move the clamp 31 in the direction of arrow a. The end of the clamp 31 moves down along the slide groove 333 and pushes the second motion input end 331 downward, so that the second motion output end 332 moves in the direction of the first motion output end 322 until the second motion output end 332 and the first motion output end 322 clamp the device to be clamped, thereby achieving the purpose of clamping and fixing the tracer 1 by the spinous process clamp 3. When releasing the clamp, the handle is rotated in the opposite direction to move the clamp 31 in the opposite direction of arrow a. The end of the clamp 31 moves up along the slide groove 333 and pulls the second motion input end 331 upward, so that the second motion output end 332 moves in the direction away from the first motion output end 322 until the second motion output end 332 and the first motion output end 322 are separated from the device to be clamped.

[0042] In other embodiments, the fixed structure may also be connected to the tracer 1 , the movable structure may also be connected to the rotating connecting rod 21 , the coarse movable structure may also be connected to the spinous process clamp 3 , and the coarse fixed structure may also be connected to the rotating connecting rod 21 .

[0043] The present application also provides a navigation system, which includes the fixing device.

[0044] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A fixing device, characterized in that: It includes a tracer, a connecting device and a spinous process clamp. The connecting device includes a rotating connecting rod and an angle adjustment mechanism connected to the rotating connecting rod. The spinous process clamp is connected to the rotating connecting rod, and the angle adjustment mechanism is connected to the tracer. The angle adjustment mechanism includes a fixed structure and a movable structure. The fixed structure is connected to the rotating connecting rod, and the movable structure is connected to the tracer. The fixed structure is provided with a plurality of tooth grooves, and the movable structure is provided with a tooth shape matching the tooth grooves. The fixed structure and the movable structure are movably connected.

2. A fixing device according to claim 1, characterized in that: The connecting device also includes a coarse adjustment mechanism, which is respectively connected to the rotating connecting rod and the spinous process clamp.

3. A fixing device according to claim 1, characterized in that: The fixed structure includes an inner ring and an outer ring that are coaxially arranged, and a plurality of tooth grooves are distributed on the end surface of the outer ring. The movable structure includes a screw, a compression spring and a pitch connecting piece. The pitch connecting piece is fixedly connected to the tracer, and a plurality of teeth are distributed on the end surface of the pitch connecting piece. The screw passes through the pitch connecting piece and extends to the inner ring, and the compression spring is connected between the screw and the pitch connecting piece.

4. A fixing device according to claim 2, characterized in that: The coarse adjustment mechanism includes a coarse fixed structure and a coarse movable structure. The coarse movable structure is connected to the rotating connecting rod, and the coarse fixed structure is connected to the spinous process clamp. The coarse fixed structure is provided with a plurality of tooth grooves, and the coarse movable structure is provided with a tooth shape matching the tooth grooves. The coarse fixed structure and the coarse movable structure are movably connected.

5. A fixing device according to claim 1, characterized in that: There are a plurality of tooth profiles, which are distributed circumferentially, and the angle between adjacent tooth profiles is a fixed value.

6. A fixing device according to claim 1, characterized in that: The spinous process clamp includes a clamp, a main fork and a secondary fork. The main fork is connected to the rotating connecting rod. The main fork and the secondary fork are rotationally connected through a rotating rod. The clamp connects the main fork and the secondary fork. The clamp, rotating rod, main fork and secondary fork form a lever structure. The main fork and the secondary fork are clamped or loosened by the clamp.

7. A fixing device according to claim 6, characterized in that: The main fork and the secondary fork are respectively provided with weight-reducing grooves.

8. A fixing device according to claim 6, characterized in that: The main fork is provided with a first protruding tooth, and the auxiliary fork is provided with a second protruding tooth. The first protruding tooth and the second protruding tooth are opposite to each other, and the first protruding tooth and the second protruding tooth are distributed alternately.

9. A navigation system, characterized in that: Comprising the fixing device according to any one of claims 1 to 8.

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