A fixing jig for a patient tracer

Abstract

The present invention provides a patient tracer fixing clamp, comprising: a first clamp arm, a second clamp arm, a pull rod, a knob, a driving wheel wrench, a transmission plate, and a tracer rod. The first clamp arm has a first slot, a first hinge hole, a rotationally mating hole, and a first supporting portion, with a first movable connecting shaft disposed in the first slot; the second clamp arm has a second slot, a second hinge hole, a third hinge hole, and a second supporting portion, with a second movable connecting shaft disposed in the second slot, and the first hinge hole and the second hinge hole are hingedly connected via a clamp arm shaft; the knob is threadedly connected to the first end of the pull rod, and the knob adjusts the preload force of the first and second clamp arms by rotating relative to the pull rod; the driving wheel wrench has a wrench portion and a cylindrical portion, and the transmission plate has a transmission shaft and a connecting shaft, the transmission shaft rotationally mating with the eccentric circular hole, and the connecting shaft rotationally mating with the third hinge hole. This patient tracer fixing clamp is convenient to use, simple to operate, lightweight, stable in clamping, and has pre-adjustable clamping force.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a patient tracer fixing fixture, which is mainly used to clamp the patient's spinous process during spinal surgery to fix the tracer position and assist a visual navigation robot in spinal positioning. Background Art

[0002] During spinal surgery, the physician needs to find a precise point on the spine for puncture or guide needle implantation. The accuracy of the puncture point requires a high level of experience from the physician. The accuracy of the puncture will also affect the subsequent postoperative results. Spinal surgery navigation and positioning technology based on visual navigation provides a reliable solution for precise puncture and guide needle implantation. An important component of the technology is the patient tracer used to indicate the patient's spatial position and couple the patient's spatial position with the navigation system. The key to the patient tracer is its fixed stability, convenient clamping, and minimization of secondary damage during surgery.

[0003] Therefore, it is extremely critical to invent a fast, easy-to-clamp, streamlined structure, numerically quantified, and stable clamping fixture.

[0004] Current technical shortcomings: Existing patient tracer fixtures require additional tools, such as wrenches, for tightening, and provide no feedback to the surgeon on the degree of tightening. Insufficient clamping force can cause the tracer to move during surgery, leading to inaccurate positioning. Excessive clamping force can compress or damage the patient's spinous process, a particularly serious problem for elderly patients with osteoporosis, who comprise a significant proportion of spinal surgery patients. Furthermore, existing patient tracer fixtures are extremely complex and heavy, placing significant pressure on the patient.

[0005] An adult has 26 spinous processes, and the size, shape, and thickness of each one are not exactly the same. Therefore, when facing different spinous processes, issues such as whether the spinous process clamp can clamp tightly, how to clamp it, whether the clamping process is simple and easy, whether the clamping mechanism is complicated to operate, and whether the clamping mechanism itself is too heavy are all issues that need to be considered. Summary of the Invention

[0006] Purpose of the Invention: This invention primarily aims to improve existing patient tracer clamping mechanisms, which suffer from inconvenient operation, low efficiency, complex structure, and excessive weight. To this end, the present invention proposes a fast, easy-to-clamp, streamlined, numerically quantified, and stable tracer clamping mechanism. This mechanism requires no tools and relies solely on the structure's self-preload for rapid clamping and release, saving effort and time, significantly alleviating the burden on patients.

[0007] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a patient tracer fixing clamp for fixing a tracer, comprising:

[0008] a first clamping arm, the first clamping arm having a first slot, a first hinge hole, a rotation-matching hole, and a first supporting portion; a first movable connecting shaft is provided in the first slot, two ends of the first movable connecting shaft are fixed relative to an inner wall of the first slot; the first supporting portion is located at a first end of the first clamping arm, the rotation-matching hole is located at a second end of the first clamping arm, and the first slot and the first hinge hole are located between the first supporting portion and the rotation-matching hole;

[0009] a second clamping arm, wherein the second clamping arm has a second groove, a second hinge hole, a third hinge hole, and a second holding portion; a second movable connecting shaft is provided in the second groove; two ends of the second movable connecting shaft are fixed relative to the interior of the second groove; the second holding portion is located at the first end of the second clamping arm; the third hinge hole is located at the second end of the second clamping arm; the second groove and the second hinge hole are located between the second holding portion and the third hinge hole; the first hinge hole and the second hinge hole are hingedly connected by the clamping arm shaft; the first holding portion and the second holding portion are arranged opposite to each other and are used to clamp the spinous process of the patient;

[0010] a pull rod, the pull rod being passed through the first movable connecting shaft and the second movable connecting shaft;

[0011] a knob, wherein the knob is threadedly connected to the first end of the pull rod, the second end of the pull rod is fixed relative to the first movable connecting shaft, and the knob adjusts the preload force of the first clamping arm and the second clamping arm by rotating relative to the pull rod;

[0012] A driving wheel wrench, the driving wheel wrench comprising a wrench portion and a cylindrical portion, the cylindrical portion being rotationally engaged with the rotational engagement hole, and an eccentric circular hole being formed on the cylindrical portion;

[0013] a transmission plate having a transmission shaft and a connecting shaft, wherein the transmission shaft is rotatably engaged with the eccentric circular hole, and the connecting shaft is rotatably engaged with the third hinge hole, and the driving wheel wrench can drive the transmission plate by rotating, thereby driving the second clamping arm to rotate relative to the first clamping arm with the clamping arm shaft as the rotation center; and

[0014] A tracer rod is fixed to the second end of the first clamping arm and is used to connect a tracer.

[0015] The patient tracer fixing fixture of the embodiment of the present invention has a relatively simple structure and is mostly modular components. There are no vulnerable parts as a whole, and each joint is easy to disassemble and replace. Moreover, it does not require any additional instrument assistance during use, and can adapt to the different forces required for clamping the spinous processes of different age groups and different shapes. It has a wide range of applications, is easy to adjust, saves effort and time, and greatly reduces the burden on patients. Specifically, by setting a knob and a pull rod, the patient tracer fixing fixture has an initial preload, and by rotating the knob, the size of the preload can be adjusted, so that surgery can be performed on different patients in a targeted manner, greatly reducing damage to the patient's spinous process and reducing the difficulty of the doctor's surgery. The entire patient tracer fixing fixture has a relatively simple structure and is light in weight, which avoids damage to the patient's spinous process due to its heavy weight.

[0016] Optionally, the first holding portion is non-planar and has a plurality of first positioning teeth, the second holding portion is non-planar and has a plurality of second positioning teeth, and the first positioning teeth and the second positioning teeth are relatively staggered.

[0017] Optionally, the knob includes a knob upper shell, a knob lower shell and an elastic member arranged between the knob upper shell and the knob lower shell, the pull rod passes through the knob lower shell and the elastic member and is threadedly connected to the knob upper shell, and one end of the knob lower shell is pressed against the second movable connecting shaft.

[0018] Optionally, the elastic member is annular, and scale lines are provided on the upper shell of the knob.

[0019] Optionally, two opposite surfaces of the first groove are each provided with a first fixing hole, two opposite surfaces of the second groove are each provided with a second fixing hole, the two ends of the first movable connecting shaft are respectively arranged at the two first fixing holes, and the two ends of the second movable connecting shaft are respectively arranged at the two second fixing holes.

[0020] Optionally, the first movable connecting axis is arranged in parallel with the second movable connecting axis; and the pull rod is arranged perpendicular to the first movable connecting axis.

[0021] Optionally, the first movable connecting shaft is slidably guided with the second movable connecting shaft and the pull rod.

[0022] Optionally, the tracer rod has a bending portion, and the bending angle of the bending portion ranges from 0° to 90°.

[0023] Optionally, the second end of the first clamp arm has a fixing notch, and the end of the tracer rod is fitted into the fixing notch.

[0024] Optionally, the middle portion of the first clamping arm has a first hollow structure, and the middle portion of the second clamping arm has a second hollow structure.

[0025] Optionally, the center line of the tracer rod is located in the clamping center plane of the first clamping arm and the second clamping arm.

[0026] Optionally, the first positioning teeth are conical, truncated cone or hemispherical, the second positioning teeth are conical, truncated cone or hemispherical, a plurality of the first positioning teeth are distributed in a matrix, and a plurality of the second positioning teeth are distributed in a matrix.

[0027] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] Figure 1 is a front view of a patient tracer fixing fixture and a tracer in one embodiment of the present invention;

[0030] Figure 2 is a rear view of a patient tracer fixing fixture and a tracer in one embodiment of the present invention;

[0031] Figure 3 yes Figure 2 Sectional view along AA;

[0032] Figure 4 is a top view of a patient tracer fixing fixture and a tracer in one embodiment of the present invention;

[0033] Figure 5 is an exploded view of a patient tracer fixing fixture and a tracer according to an embodiment of the present invention;

[0034] Figure 6 is a schematic diagram of a first clamping arm in one embodiment of the present invention;

[0035] Figure 7 is a schematic diagram of a second clamping arm in one embodiment of the present invention;

[0036] Figure 8 Schematic diagram of a driving wheel wrench in one embodiment of the present invention.

[0037] Reference numerals:

[0038] 1-tracer;

[0039] 10 - first clamping arm; 11 - first slot; 12 - first hinge hole; 13 - rotational matching hole; 14 - first supporting portion; 141 - first positioning tooth; 15 - first movable connecting shaft; 16 - fixing notch;

[0040] 20 - second clamping arm; 21 - second slot; 22 - second hinge hole; 23 - third hinge hole; 24 - second supporting portion; 241 - second positioning tooth; 25 - second movable connecting shaft; 26 - clamping arm shaft;

[0041] 30-pull rod;

[0042] 40-knob; 41-knob upper shell; 42-knob lower shell; 43-elastic member;

[0043] 50-driving wheel wrench; 51-wrench portion; 52-cylindrical portion; 53-eccentric circular hole;

[0044] 60-transmission plate; 61-transmission shaft; 62-connecting shaft;

[0045] 70-tracer rod; 71-bending portion. DETAILED DESCRIPTION

[0046] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0047] See Figures 1-8 This embodiment provides a patient tracer fixing clamp for fixing a tracer. The patient tracer fixing clamp mainly includes: a first clamping arm 10, a second clamping arm 20, a pull rod 30, a knob 40, a driving wheel wrench 50, a transmission plate 60, and a tracer rod 70. The first clamping arm 10 has a first slot 11, a first hinge hole 12, a rotation matching hole 13, and a first supporting portion 14. A first movable connecting shaft 15 is provided in the first slot 11. Both ends of the first movable connecting shaft 15 are fixed relative to the inner wall of the first slot 11. The first supporting portion 14 is located at the first end of the first clamping arm 10, and the rotation matching hole 13 is located at the second end of the first clamping arm 10. The first slot 11 and the first hinge hole 12 are located between the first supporting portion 14 and the rotation matching hole 13.

[0048] The second clamping arm 20 has a second groove 21, a second hinge hole 22, a third hinge hole 23 and a second supporting part 24. A second movable connecting shaft 25 is arranged in the second groove 21. The two ends of the second movable connecting shaft 25 are fixed relative to the inside of the second groove 21. The second supporting part 24 is located at the first end of the second clamping arm 20, and the third hinge hole 23 is located at the second end of the second clamping arm 20. The second groove 21 and the second hinge hole 22 are located between the second supporting part 24 and the third hinge hole 23. The first hinge hole 12 and the second hinge hole 22 are hinged to each other through the clamping arm shaft 26, so that the first clamping arm 10 and the second clamping arm 20 can rotate around the clamping arm shaft 26. The principle is similar to that of tools such as scissors or needle-nosed pliers. The first supporting part 14 and the second supporting part 24 are arranged opposite to each other for clamping the patient's spinous process. In the process of the first clamping arm 10 and the second clamping arm 20 rotating around the clamping arm shaft 26, the relative distance between the first supporting part 14 and the second supporting part 24 can increase or decrease, thereby clamping the patient's spinous process.

[0049] The pull rod 30 passes through the first movable connecting shaft 15 and the second movable connecting shaft 25 and can slide relative to the first movable connecting shaft 15 and the second movable connecting shaft 25; the first movable connecting shaft 15 and the second movable connecting shaft 25 can provide a certain guiding effect for the pull rod 30.

[0050] The knob 40 is threadedly connected to the first end of the pull rod 30, and the second end of the pull rod 30 is fixed relative to the first articulating shaft 15. Specifically, the second end of the pull rod 30 has a protrusion structure to prevent the pull rod 30 from being separated from the first articulating shaft 15. The knob 40 can be rotated relative to the pull rod 30 to adjust the preload force of the first clamping arm 10 and the second clamping arm 20.

[0051] The driving wheel wrench 50 has a wrench part 51 and a cylindrical part 52. The cylindrical part 52 is rotatably engaged with the rotational engagement hole 13, and an eccentric circular hole 53 is provided on the cylindrical part 52; the transmission plate 60 has a transmission shaft 61 and a connecting rotating shaft 62. The transmission shaft 61 is rotatably engaged with the eccentric circular hole 53, and the connecting rotating shaft 62 is rotatably engaged with the third hinge hole 23. The driving wheel wrench 50 can drive the transmission plate 60 by rotation, and then drive the second clamping arm 20 to rotate relative to the first clamping arm 10 with the clamping arm shaft 26 as the rotation center; the tracer rod 70 is fixed to the second end of the first clamping arm 10, for connecting the tracer 1.

[0052] The patient tracer fixing clamp of the above embodiment is operated as follows: the first clamp arm 10 and the second clamp arm 20 of the product have a preload force in the initial position. The preload force is applied by the knob 40 and the pull rod 30. The knob 40 is rotated to the required force for surgery (the clamp preload force value is determined through preoperative planning). The driving wheel wrench 50 is rotated clockwise to separate the first clamp arm 10 and the second clamp arm 20. The driving wheel wrench 50 is maintained stationary and the first holding portion 14 and the second holding portion 24 at the front end are clamped to a certain depth of the patient's spinous process. The knob 40 is then slowly released to complete the clamping.

[0053] Most of the spinous process clamps known in the related art are complex in structure, resulting in excessive weight and fragile components. They exert significant pressure on the patient during surgery and lack structural durability under long-term high-temperature sterilization and repeated use. Furthermore, most of the clamps known in the related art are complex and laborious to operate, and some even require the use of a hexagonal wrench or pliers to assist in clamping, requiring the doctor to expend considerable force to secure them to the patient's spinous process, which is extremely laborious. The patient tracer fixing clamp of the above-described embodiment is primarily intended to address the small, fragile components, complex structure, and excessive weight of existing spinous process clamps, making them difficult to operate and clamp. The patient tracer fixing clamp of the above-described embodiment has a relatively simple structure, is lightweight, easy to operate, and provides a secure clamping mechanism. The patient tracer fixing clamp of the above-described embodiment has a relatively simple structure and is primarily modular, with no vulnerable parts, and its joints are easily disassembled and replaced. Furthermore, it does not require any additional equipment during use and can adapt to the varying forces required to clamp spinous processes of different age groups and shapes. It has a wide range of applications, is easy to adjust, saves effort and time, and significantly reduces the burden on patients.

[0054] Specifically, by setting the knob 40 and the pull rod 30, the patient tracer fixing clamp has an initial pre-tightening force, and by rotating the knob 40, the magnitude of the pre-tightening force can be adjusted, so that surgery can be performed on different patients in a targeted manner, greatly reducing the damage to the patient's spinous process and reducing the difficulty of the doctor's surgery. The entire patient tracer fixing clamp has a relatively simple structure and a light overall weight, which avoids damage to the patient's spinous process due to its heavy weight.

[0055] In some embodiments, see Figure 6 and Figure 7 The first holding part 14 is non-planar and has a plurality of first positioning teeth 141. The second holding part 24 is non-planar and has a plurality of second positioning teeth 241. The first positioning teeth 141 and the second positioning teeth 241 are relatively staggered. By setting the first positioning teeth 141 and the second positioning teeth 241, the stability of the spinous process clamping can be enhanced, thereby ensuring the accuracy of the tracer.

[0056] Since the human spinous process is irregular in shape, with two sides roughly forming an inward-concave arc surface, if the clamping part is designed to be flat, it will not fit tightly against the spinous process and may fall off during surgery. If it is clamped too tightly, it may cause damage to the spinous process. Therefore, it is designed to be non-flat and fit the shape of the spinous process, which has a more stable and safer clamping effect.

[0057] In some embodiments, see Figure 3 The knob 40 includes an upper knob shell 41, a lower knob shell 42, and an elastic member 43 disposed between the upper knob shell 41 and the lower knob shell 42. The pull rod 30 passes through the lower knob shell 42 and the elastic member 43 and is threadedly connected to the upper knob shell 41. One end of the lower knob shell 42 presses against the second movable connecting shaft 25. For example, the elastic member 43 is a silicone spring pad.

[0058] When the knob 40 is rotated, the pull rod 30 moves axially relative to the knob upper shell 41, so that the knob upper shell 41 and the knob lower shell 42 squeeze the elastic part 43, and the elastic part 43 is squeezed and deformed. The relative positions of the rotating knob 40 and the pull rod 30 are different, and the corresponding elastic part 43 is squeezed to different degrees, and the squeezing force is transmitted to the second clamping arm 20 and the first clamping arm 10, thereby adjusting the initial preload force of the second clamping arm 20 and the first clamping arm 10.

[0059] The above-mentioned design of the knob 40 plays a key role in clinical surgery. Since people of different age groups have different bone qualities, using the same clamping force may cause damage to the spinous process of the elderly or people with osteoporosis. Therefore, the patient's bone quality can be judged through preoperative planning, and the clamping force can be adjusted so that the desired force value state can be achieved when clamping the spinous process, avoiding damage to the spinous process while ensuring the clamping effect; In addition, a scale line can be set on the rotating knob 40 to more accurately adjust the preload force, greatly improving the doctor's tolerance and ease of use. The doctor no longer has to clamp by feel. By setting the elastic member 43, the elastic member 43 itself can be deformed and the active wheel wrench 50 can be used to adapt to the different forces required for clamping the spinous process of different age groups and different shapes. It has a wide range of applications, is easy to adjust, saves effort and time, and greatly reduces the burden on patients.

[0060] In some embodiments, the elastic member 43 is annular, and the pull rod 30 passes through the center hole of the elastic member 43 and is threadedly connected to the knob upper shell 41. The knob upper shell 41 is provided with scale lines to accurately control the rotation angle and thus accurately control the size of the preload force.

[0061] In some embodiments, a first fixing hole is provided on both opposite sides of the first groove 11, and the first fixing hole passes through the side wall of the first groove 11; a second fixing hole is provided on both opposite sides of the second groove 21, and the second fixing hole passes through the side wall of the second groove 21; the two ends of the first movable connecting shaft 15 are respectively arranged at the two first fixing holes, and the two ends of the second movable connecting shaft 25 are respectively arranged at the two second fixing holes.

[0062] In some embodiments, the first movable connecting shaft 15 is arranged parallel to the second movable connecting shaft 25 ; and the pull rod 30 is arranged perpendicular to the first movable connecting shaft 15 .

[0063] The shapes, materials, and dimensions of the first and second articulating shafts 15 and 25 may be identical, partially identical, partially different, or completely different. Choosing the same shape, material, and dimensions for the first and second articulating shafts 15 and 25 facilitates assembly and reduces manufacturing costs.

[0064] In some embodiments, the first movable connecting shaft 15 is slidably guided with the second movable connecting shaft 25 and the pull rod 30. The first movable connecting shaft 15, the second movable connecting shaft 25 and the pull rod 30 can all be rigid shafts.

[0065] In some embodiments, the tracer rod 70 has a bend portion, and the bend portion has a bend angle ranging from 0° to 90°. Preferably, the bend angle ranges from 40° to 50°. For example, the bend angle can be 42°, 45°, 48°, etc. Generally, in clinical practice, the camera direction for capturing tracers is tilted from top to bottom. At this angle, the tracer can be captured over the largest area, thereby improving the operation effect.

[0066] For example, if the bending angle of the bending portion is set to 45°, the azimuth angle of the tracer 1 is 45° upward, eliminating the excess rotation amount, strengthening the overall stability of the component, and improving the tolerance for inaccurate positioning caused by accidental collision during surgery.

[0067] The tracer 1 adopts a four-corner cantilever design, which reduces its own weight while providing enough angle and area for identification and docking with the visual navigation system.

[0068] In some embodiments, the second end of the first clamp arm 10 has a fixing notch 16, and the end of the tracer rod 70 is fitted into the fixing notch 16. The tracer rod 70 and the fixing notch 16 are designed to be detachably connected or welded.

[0069] In some embodiments, the middle portion of the first clamping arm 10 has a first hollow structure, and the middle portion of the second clamping arm 20 has a second hollow structure, thereby further reducing weight.

[0070] In some embodiments, the driving wheel wrench 50 can be ergonomically designed, using the smallest structure, the most streamlined design, and the lightest weight within a safe range to transmit the greatest force. The first supporting portion 14 at the front end of the first clamping arm 10 and the second supporting portion 24 at the front end of the second clamping arm 20 are designed with a certain angle, which is more ergonomic and fits the shape of the spinous process. When clamping, the supporting portion and the spinous process fit more tightly and are not easy to loosen. The clamping arm shaft 26 adopts stamping and riveting technology to fix it directly with the first clamping arm 10 or the second clamping arm 20, without the need for welding, screws and nuts and other structures, reducing processing difficulty and reducing deadweight. The transmission shaft 61 is connected to the driving wheel wrench 50 in a tight fit manner, without the need for welding, screws and nuts and other structures, reducing processing difficulty, reducing deadweight and enhancing product integrity. The knob upper shell 41 adopts a scale design to make the clamping force value of the component controllable and visual, and to plan and adjust for individual patients. The elastic member 43 is made of a wear-resistant, high-temperature-resistant material with high compressive strength, ensuring it can withstand the high-temperature sterilization conditions of a hospital while maintaining a sufficiently long service life. The elastic member 43 is placed between the upper knob shell 41 and the lower knob shell 42, and then assembled. The three are riveted together using the tie rod 30 to limit the position of the three. This also secures the first and second movable connecting shafts 15, 25 to the first and second clamping arms 10, 20.

[0071] In some embodiments, the centerline of the tracer rod 70 is located within the clamping center plane of the first clamping arm 10 and the second clamping arm 20, thereby facilitating stability after clamping. Furthermore, the tracer 1 is mounted on the end of the tracer rod 70, and the end of the tracer rod 70 is connected to the center position of the tracer 1.

[0072] In some embodiments, the first positioning tooth 141 is conical, truncated cone or hemispherical, and the second positioning tooth 241 is conical, truncated cone or hemispherical. This shape is conducive to stable clamping of the spinous process and minimizes damage to the spinous process.

[0073] Furthermore, the plurality of first positioning teeth 141 and the plurality of second positioning teeth 241 are distributed in a matrix. The matrix distribution can increase the area of the spinous process to further improve the stability of the clamping, reduce the local pressure on the spinous process, and thus reduce damage to the spinous process.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0076] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0077] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0078] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0079] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A patient tracer fixing fixture for fixing a tracer (1), characterized in that: include: a first clamping arm (10), the first clamping arm (10) having a first slot (11), a first hinge hole (12), a rotational matching hole (13) and a first supporting portion (14); a first movable connecting shaft (15) is provided in the first slot (11); two ends of the first movable connecting shaft (15) are fixed relative to the inner wall of the first slot (11); the first supporting portion (14) is located at the first end of the first clamping arm (10); the rotational matching hole (13) is located at the second end of the first clamping arm (10); the first slot (11) and the first hinge hole (12) are located between the first supporting portion (14) and the rotational matching hole (13); a second clamping arm (20), wherein the second clamping arm (20) has a second slot (21), a second hinge hole (22), a third hinge hole (23) and a second holding portion (24); a second movable connecting shaft (25) is provided in the second slot (21); both ends of the second movable connecting shaft (25) are fixed relative to the interior of the second slot (21); the second holding portion (24) is located at the first end of the second clamping arm (20); the third hinge hole (23) is located at the second end of the second clamping arm (20); the second slot (21) and the second hinge hole (22) are located between the second holding portion (24) and the third hinge hole (23); the first hinge hole (12) and the second hinge hole (22) are hinged to each other through the clamping arm shaft (26); the first holding portion (14) and the second holding portion (24) are arranged relative to each other for clamping the patient's spinous process; A pull rod (30), the pull rod (30) being passed through the first movable connecting shaft (15) and the second movable connecting shaft (25); a knob (40), wherein the knob (40) is threadedly connected to the first end of the pull rod (30), the second end of the pull rod (30) is fixed relative to the first movable connecting shaft (15), and the knob (40) adjusts the preload force of the first clamping arm (10) and the second clamping arm (20) by rotating relative to the pull rod (30); A driving wheel wrench (50), the driving wheel wrench (50) comprising a wrench portion (51) and a cylindrical portion (52), the cylindrical portion (52) being rotationally engaged with the rotational engagement hole (13), and an eccentric circular hole (53) being provided on the cylindrical portion (52); A transmission plate (60), wherein the transmission plate (60) has a transmission shaft (61) and a connecting shaft (62), wherein the transmission shaft (61) is rotationally engaged with the eccentric circular hole (53), and the connecting shaft (62) is rotationally engaged with the third hinge hole (23), and the driving wheel wrench (50) can drive the transmission plate (60) by rotation, thereby driving the second clamping arm (20) to rotate relative to the first clamping arm (10) with the clamping arm shaft (26) as the rotation center; and A tracer rod (70) is fixed to the second end of the first clamping arm (10) and is used for connecting to the tracer (1).

2. The patient tracer fixing fixture according to claim 1, characterized in that: The first holding portion (14) is non-planar and has a plurality of first positioning teeth (141); the second holding portion (24) is non-planar and has a plurality of second positioning teeth (241); the first positioning teeth (141) and the second positioning teeth (241) are relatively staggered.

3. The patient tracer fixing fixture according to claim 1, characterized in that: The knob (40) comprises a knob upper shell (41), a knob lower shell (42), and an elastic member (43) disposed between the knob upper shell (41) and the knob lower shell (42); the pull rod (30) passes through the knob lower shell (42) and the elastic member (43) and is threadedly connected to the knob upper shell (41); one end of the knob lower shell (42) is pressed against the second movable connecting shaft (25).

4. The patient tracer fixing fixture according to claim 3, characterized in that: The elastic member (43) is annular, and scale lines are provided on the knob upper shell (41).

5. The patient tracer fixing fixture according to claim 1, characterized in that: Two opposite surfaces of the first groove (11) are each provided with a first fixing hole, and two opposite surfaces of the second groove (21) are each provided with a second fixing hole. The two ends of the first movable connecting shaft (15) are respectively passed through and fixed to the two first fixing holes, and the two ends of the second movable connecting shaft (25) are respectively passed through and fixed to the two second fixing holes.

6. The patient tracer fixing fixture according to claim 1, characterized in that: The first movable connecting shaft (15) and the second movable connecting shaft (25) are arranged in parallel; the pull rod (30) and the first movable connecting shaft (15) are arranged perpendicularly; The first movable connecting shaft (15) is slidably guided with the second movable connecting shaft (25) and the pull rod (30).

7. The patient tracer fixing fixture according to claim 1, characterized in that: The tracer rod (70) has a bending portion (71), and the bending angle of the bending portion (71) ranges from 0° to 90°.

8. The patient tracer fixing fixture according to claim 1, characterized in that: The middle portion of the first clamping arm (10) has a first hollow structure, and the middle portion of the second clamping arm (20) has a second hollow structure.

9. The patient tracer fixing fixture according to claim 1, wherein: The center line of the tracer rod (70) is located within the clamping center plane of the first clamping arm (10) and the second clamping arm (20).

10. The patient tracer fixing fixture according to claim 2, characterized in that: The first positioning teeth (141) are conical, truncated cone or hemispherical, the second positioning teeth (241) are conical, truncated cone or hemispherical, a plurality of the first positioning teeth (141) are distributed in a matrix, and a plurality of the second positioning teeth (241) are distributed in a matrix.

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