Vertebral body trailing edge file head and bone file
By designing a multi-toothed file head and a motor-driven reciprocating oscillation, the problem of the single grinding position of existing bone files has been solved, enabling flexible grinding and cooling rinsing, and reducing patient trauma.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-17
AI Technical Summary
Existing bone files have limited grinding positions and lack flexibility, leading to increased trauma for patients.
A posterior vertebral body file was designed, including a file head and a connecting rod. The file head is equipped with various types of file teeth, which can flexibly grind the lateral wall of the spine. The file handle is driven by a motor to reciprocate and swing, and combined with the water injection channel for cooling and rinsing.
It enables flexible selection of grinding positions, improves grinding efficiency, reduces patient trauma, and prevents tissue damage by cooling through water injection channels.
Smart Images
Figure CN223994940U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a vertebral body posterior edge file head and bone file. Background Technology
[0002] With the development of modern medical technology, orthopedic surgery has become more diversified. Therefore, different types of surgical blades are needed during surgery to cut, grind, scrape, and clamp lesions for different orthopedic diseases.
[0003] Bone files are primarily used to grind the surface of bone tissue, exposing the active layer of bone. Most bone files on the market today are manual, consisting of a stainless steel file head and a handle at the end. These files offer advantages such as simple and effective design and low cost. However, they also have several drawbacks. For example, in spinal surgery, the file head is frequently used to grind the posterior edge of the vertebral body. Conventional files can only work on the bone directly in front of the work area; they cannot work on areas above or below the work area, or require a larger cross-section to work on, which increases surgical time and trauma to the patient.
[0004] Therefore, existing methods of grinding bone abrasion have limitations in terms of the single grinding location, lack of flexibility, and the risk of exacerbating patient trauma. Utility Model Content
[0005] In view of this, the purpose of this utility model is to provide a vertebral body posterior edge file and a bone file, so as to at least solve the problems of existing bone files having a single grinding position, lack of flexibility, and the risk of aggravating patient trauma.
[0006] This utility model solves the above-mentioned technical problems through the following technical means:
[0007] In a first aspect, the present invention provides a posterior edge file for a vertebra, comprising a file head and a connecting rod, wherein the file head is connected to one end of the connecting rod, the file head comprising a cutter body and at least two filing teeth disposed on the cutter body, the filing teeth extending along the top of the cutter body to the side of the cutter body facing the connecting rod, and the side of the cutter body away from the connecting rod being a toothless smooth surface.
[0008] In some embodiments, the file teeth include an integrally formed first arc-shaped tooth, a straight tooth, and a second arc-shaped tooth, which are connected in sequence, with the first arc-shaped tooth located at the top of the cutter head body.
[0009] In some embodiments, both the straight teeth and the second arc-shaped teeth are located on the side of the cutter head body facing the connecting rod.
[0010] In some embodiments, the straight teeth are inclinedly disposed between the first arc-shaped teeth and the second arc-shaped teeth.
[0011] In some embodiments, a chip removal groove is provided between two adjacent file teeth.
[0012] Secondly, this utility model also provides a bone file, which includes the posterior edge file head of the vertebral body described in the first aspect above.
[0013] In some embodiments, the bone file further includes a file handle, an outer blade tube, and a handle. One end of the file handle is connected to a connecting rod, and the other end is located inside the handle. The outer blade tube is sleeved on the file handle. A first eccentric shaft is fixed to the end of the file handle away from the file head, and the first eccentric shaft is eccentrically connected to the file handle. An input shaft is installed inside the handle. A second eccentric shaft is fixed to one end of the input shaft, and the second eccentric shaft is eccentrically connected to the input shaft. A reciprocating conversion linkage connects the file handle and the input shaft. The first eccentric shaft and the second eccentric shaft are respectively inserted into opposite sides of the reciprocating conversion linkage. The unidirectional rotation of the input shaft drives the reciprocating conversion linkage to rotate, thereby driving the file handle to reciprocate.
[0014] In some embodiments, a first water injection channel is provided between the outer blade tube and the file handle, and water in the first water injection channel is sprayed out through the end of the outer blade tube near the file head. The handle has a second water injection channel inside, and one end of the second water injection channel is connected to the first water injection channel.
[0015] In some embodiments, a water passage is provided between the outer blade and the file handle. The water passage is sleeved on the file handle. One end of the water passage has a flat surface on its circumferential outer wall. One end of the flat surface is located outside the outer blade, and the other end is located inside the outer blade. Water in the first water injection channel is sprayed out from the gap between the flat surface and the outer blade. The water passage has an axially arranged notch. The gap formed between the water passage and the outer blade through the notch constitutes the first water injection channel.
[0016] In some embodiments, the handle includes an outer shell, a spiral water-cooling sleeve, and an anti-slip sleeve. One end of the spiral water-cooling sleeve is fitted onto the outer shell, and the anti-slip sleeve is fastened to the outer shell. The anti-slip sleeve is fitted onto the spiral water-cooling sleeve, which has a spiral channel. The outer shell has a water inlet hole, and a water injection cavity is formed between the file handle and the outer shell. The water injection cavity communicates with a first water injection channel, and the spiral channel, the water inlet hole, and the water injection cavity communicate to form a second water injection channel.
[0017] In use, the posterior vertebral body file of this invention passes through the intervertebral foramen. The file teeth, consisting of a first arc-shaped tooth, straight teeth, and a second arc-shaped tooth, can grind the lateral wall of the spine, allowing for grinding at more locations with greater flexibility and convenience. The bone file of this invention is used for grinding bone or tissue. Driven by an external motor, the input shaft rotates unidirectionally, driving a reciprocating connecting rod to rotate and causing the file handle to reciprocate. This, in turn, causes the file head to reciprocate, achieving grinding at the desired location. The reciprocating grinding motion results in high grinding efficiency and flexible selection of the grinding location. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the file head at the posterior edge of the vertebral body;
[0019] Figure 2 This is a front view of the file head at the posterior edge of the vertebral body;
[0020] Figure 3 This is a schematic diagram of the operation of the posterior edge file of the vertebral body;
[0021] Figure 4 This is a schematic diagram of the structure of a bone file;
[0022] Figure 5 yes Figure 1 Enlarged structural diagram at point A;
[0023] Figure 6 This is a cross-sectional view of a bone file;
[0024] Figure 7 yes Figure 5 Enlarged structural diagram at point B;
[0025] Figure 8 This is a structural diagram of the file handle, reciprocating connecting rod, and input shaft;
[0026] Figure 9 This is a schematic diagram of the water pipe structure;
[0027] The components include: a posterior edge file head 100, a file head 110, a file head body 111, file teeth 112, a first arc-shaped tooth 1121, a straight tooth 1122, a second arc-shaped tooth 1123, a chip removal groove 113, a connecting rod 120, a file handle 200, a connecting blind hole 210, a first eccentric shaft 220, an outer blade tube 300, a stepped hole 310, a handle 400, an outer casing 410, a water inlet hole 411, a spiral water cooling sleeve 420, a spiral channel 421, an anti-slip sleeve 430, an interface sleeve 440, a bearing 450, an input shaft 500, a second eccentric shaft 510, a reciprocating conversion connecting rod 600, a plug hole 610, a water pipe 700, a flat surface 710, a notch 720, a retaining sleeve 810, a sealing ring 820, an intervertebral foramen 001, a spine 0, a grinding position 002, and a water injection chamber 003. Detailed Implementation
[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.
[0029] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific circumstances.
[0030] Please refer to Figure 1 and Figure 2 This application discloses a posterior edge file 100 for a vertebra, comprising a file head 110 and a connecting rod 120. The file head 110 is connected to one end of the connecting rod 120, and the file head 110 is fixedly connected to the connecting rod 120. The file head 110 includes a cutter body 111 and at least two filing teeth 112 disposed on the cutter body 111. The filing teeth 112 extend along the top of the cutter body 111 to the side of the cutter body 111 facing the connecting rod 120, and the side of the cutter body 111 away from the connecting rod 120 is a toothless smooth surface.
[0031] Each file tooth 112 has a triangular longitudinal section. The file tooth 112 includes an integrally formed first arc-shaped tooth 1121, a straight tooth 1122, and a second arc-shaped tooth 1123. The first arc-shaped tooth 1121, the straight tooth 1122, and the second arc-shaped tooth 1123 are connected in sequence. The first arc-shaped tooth 1121 is located at the top of the cutter head body 111.
[0032] Both the straight tooth 1122 and the second arc-shaped tooth 1123 are located on the side of the cutter head body 111 facing the connecting rod 120. The straight tooth 1122 is inclined between the first arc-shaped tooth 1121 and the second arc-shaped tooth 1123, and both the first arc-shaped tooth 1121 and the second arc-shaped tooth 1123 protrude outwards. In order to prevent the accumulation of bone chips formed during grinding from affecting grinding efficiency, there is a chip removal groove 113 between two adjacent file teeth 112. During the grinding process, bone chips accumulate in the chip removal groove 113, but under the centrifugal force of the oscillating file head 110, the bone chips are thrown out to improve grinding efficiency.
[0033] Please refer to Figure 3 In use, the posterior vertebral body file 100 of this application has a file head 110 that passes through the intervertebral foramen 001. The file teeth 112, composed of a first arc-shaped tooth 1121, a straight tooth 1122, and a second arc-shaped tooth 1123, can grind the lateral wall of the spine 0. For example... Figure 3 The grinding position is 002. When grinding with the posterior edge file 100 of the vertebral body of this application, there are more grinding positions, which is more flexible and convenient. The side of the cutter head body 111 away from the connecting rod 120 is a toothless smooth surface, which can be set as a vertical plane or a smooth arc surface to avoid secondary damage to the spine-related tissues.
[0034] Please refer to Figures 4-9 In another embodiment, this application also provides a bone file, which includes the aforementioned posterior vertebral body file head 100. The bone file also includes a file handle 200, an outer blade tube 300, and a handle 400. One end of the file handle 200 is connected to a connecting rod 120. Specifically, one end of the file handle 200 has a connecting blind hole 210, and the connecting rod 120 is inserted into the connecting blind hole 210 and subjected to an interference fit. Please refer to... Figure 8 The other end of the file handle 200 is located inside the handle 400. An outer blade tube 300 is sleeved on the file handle 200. A first eccentric shaft 220 is fixed to the end of the file handle 200 away from the file head 110, and the first eccentric shaft 220 is eccentrically connected to the file handle 200. An input shaft 500 is installed inside the handle 400. A second eccentric shaft 510 is fixed to one end of the input shaft 500, and the second eccentric shaft 510 is eccentrically connected to the input shaft 500. A reciprocating conversion linkage 600 connects the file handle 200 and the input shaft 500. The first eccentric shaft 220 and the second eccentric shaft 510 are respectively inserted into opposite sides of the reciprocating conversion linkage 600. Specifically, the reciprocating connecting rod 600 has two insertion holes 610, which are located at opposite ends of the reciprocating connecting rod 600. The first eccentric shaft 220 and the second eccentric shaft 510 are respectively inserted into the two insertion holes 610. The other end of the input shaft 500 is connected to a motor. The rotation of the motor drives the input shaft 500 to rotate in one direction. The unidirectional rotation of the input shaft 500 drives the reciprocating connecting rod 600 to rotate, which in turn drives the file handle 200 to reciprocate.
[0035] A first water injection channel is provided between the outer blade tube 300 and the file handle 200. Water in the first water injection channel is sprayed out from the end of the outer blade tube 300 near the file head 110 to cool and rinse the grinding area. The handle 400 has a second water injection channel inside. One end of the second water injection channel is connected to the first water injection channel, and the other end of the second water injection channel is connected to an external water injection mechanism. The external water injection mechanism injects water into the second water injection channel, which flows through the first water injection channel and is sprayed out from the end of the outer blade tube 300 near the file head 110.
[0036] A water pipe 700 is installed between the outer blade tube 300 and the file handle 200. Please refer to [reference needed]. Figure 9 A water pipe 700 is fitted onto the file handle 200. A flat surface 710 is located on the outer circumferential wall of one end of the water pipe 700. One end of the flat surface 710 is located outside the outer blade tube 300, and the other end is located inside the outer blade tube 300. Water in the first water injection channel is ejected from the gap between the flat surface 710 and the outer blade tube 300. Specifically, the flat surface 710 is located at the end of the outer blade tube 300 near the file head 110, and the flat surface 710 extends out of the outer blade tube 300, forming a gap between it and the outer blade tube 300 to allow water to flow out of the first water injection channel.
[0037] The water pipe 700 has an axially oriented notch 720, and the gap formed between the water pipe 700 and the outer blade tube 300 through the notch 720 constitutes the first water injection channel. Specifically, the water pipe 700 is sleeved on the file handle 200, and the outer blade tube 300 is sleeved on the water pipe 700. The notch 720 allows for a relatively unobstructed channel between the outer blade tube 300 and the water pipe 700, which serves as the first water injection channel. One end of the flat surface 710 is also formed on the side of the water pipe 700 corresponding to the notch 720, allowing water flowing through the notch 720 to flow smoothly out of the flat surface 710, that is, water from the first water injection channel can flow out of the flat surface 710.
[0038] The handle 400 includes an outer shell 410, a spiral water-cooling sleeve 420, and an anti-slip sleeve 430. One end of the spiral water-cooling sleeve 420 is fitted onto the outer shell 410. The anti-slip sleeve 430 is fastened to the outer shell 410 and fitted onto the spiral water-cooling sleeve 420. The spiral water-cooling sleeve 420 has a spiral channel 421, which is connected to an external water injection mechanism for water injection. The outer shell 410 has a water inlet hole 411. A water injection cavity 003 is located between the file handle 200 and the outer shell 410. The water injection cavity 003 communicates with a first water injection channel. The spiral channel, the water inlet hole, and the water injection cavity 003 communicate to form a second water injection channel.
[0039] The end of the outer blade tube 300 away from the file head 110 is inserted into the outer casing 410, and the end of the outer blade tube 300 inserted into the outer casing 410 has a stepped hole 310, which connects to the water injection chamber 003 to facilitate water injection. The file handle 200 is fitted with a retaining sleeve 810 and a sealing ring 820 at one end of the water injection chamber 003. The outer circumferences of the retaining sleeve 810 and the sealing ring 820 are in contact with the inner wall of the outer casing 410 to seal the end of the water injection chamber 003 away from the first water injection channel. An interface sleeve 440 is also installed inside the spiral water-cooling jacket 420. The input shaft 500 passes through the interface sleeve 440, and a bearing 450 is installed between the input shaft 500 and the interface sleeve 440, with the bearing 450 fitted onto the input shaft 500.
[0040] The bone file of this application is used to grind bone or tissue. Driven by an external motor, the input shaft 500 rotates in one direction, which drives the reciprocating conversion linkage 600 to rotate and drive the file handle 200 to reciprocate, thereby causing the file head 110 to reciprocate, so as to achieve grinding of the position to be ground. The reciprocating grinding makes the grinding efficiency high and the selection of the grinding position more flexible.
[0041] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.
Claims
1. A posterior vertebral body reamer, comprising: The file head and the connecting rod are connected, the file head includes a file head body and at least two file teeth arranged on the file head body, the file teeth extend along the top of the file head body to the side of the file head body facing the connecting rod, and the side of the file head body away from the connecting rod is a smooth toothless surface.
2. The vertebral body posterior wall reamer of claim 1 wherein, The file teeth include integrally formed first arc-shaped teeth, straight teeth and second arc-shaped teeth, which are sequentially connected, and the first arc-shaped teeth are located at the top of the file head body.
3. The vertebral body reamer according to claim 2, wherein, The straight teeth and the second arc-shaped teeth are located on the side of the file head body facing the connecting rod.
4. The vertebral body reamer according to claim 3, wherein, The straight teeth are obliquely arranged between the first arc-shaped teeth and the second arc-shaped teeth.
5. The vertebral body reamer according to claim 1, wherein, Adjacent two file teeth have a chip removal groove.
6. A bone rasp comprising: The bone file includes the posterior edge file head according to any one of claims 1-5.
7. A bone rasp according to claim 6 wherein, The bone file further includes a file handle, an outer cutter tube and a handle, one end of the file handle is connected with the connecting rod, the other end is located in the interior of the handle, the outer cutter tube is sleeved on the file handle, a first eccentric shaft is fixed on the end of the file handle away from the file head, and the first eccentric shaft is eccentrically connected with the file handle; an input shaft is installed in the handle, a second eccentric shaft is fixed on one end of the input shaft, the second eccentric shaft is eccentrically connected with the input shaft, a reciprocating conversion connecting rod is connected between the file handle and the input shaft, the first eccentric shaft and the second eccentric shaft are respectively inserted into opposite sides of the reciprocating conversion connecting rod, and one-way rotation of the input shaft drives the reciprocating conversion connecting rod to rotate and drives the file handle to reciprocating rotate.
8. A bone rasp according to claim 7, wherein, The outer cutter tube and the file handle have a first water injection channel, water in the first water injection channel is sprayed out through the end of the outer cutter tube close to the file head, and the handle has a second water injection channel in the interior thereof, and one end of the second water injection channel is in communication with the first water injection channel.
9. A bone rasp according to claim 8, wherein, The outer cutter tube and the file handle are provided with a water passing pipe, the water passing pipe is sleeved on the file handle, the circumferential outer wall of one end of the water passing pipe has a flat surface, one end of the flat surface is located on the outside of the outer cutter tube, and the other end is located in the outer cutter tube, and water in the first water injection channel is sprayed out from the gap between the flat surface and the outer cutter tube; the water passing pipe has an axially arranged notch, and the gap formed between the water passing pipe and the outer cutter tube through the notch constitutes the first water injection channel.
10. A bone rasp according to claim 9, wherein, The handle includes an outer shell sleeve, a spiral water cooling sleeve and an anti-skid sleeve, one end of the spiral water cooling sleeve is sleeved on the outer shell sleeve, the anti-skid sleeve is buckled with the outer shell sleeve, the anti-skid sleeve is sleeved on the spiral water cooling sleeve, the spiral water cooling sleeve has a spiral channel, the outer shell sleeve has a water inlet hole, the file handle and the outer shell sleeve have a water injection cavity, the water injection cavity is in communication with the first water injection channel, the spiral channel, the water inlet hole and the water injection cavity are in communication to constitute the second water injection channel.