CN117442263A

CN117442263A - Vertebral lamina opening device

Info

Publication number: CN117442263A
Application number: CN202311781297.5A
Authority: CN
Inventors: 丰荣杰; 张玮楠; 李健
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2023-12-22
Filing date: 2023-12-22
Publication date: 2024-01-26
Anticipated expiration: 2043-12-22
Also published as: CN117442263B

Abstract

The invention provides a vertebral plate opening device, which comprises: a first connection portion and a second connection portion; a connection structure connected between the first connection portion and the second connection portion; the adjusting structure is arranged on the connecting structure and connected with the first connecting part, and can drive the first connecting part to swing relative to the connecting structure; and the locking structure is arranged on the connecting structure and provided with a locking position in locking fit with the adjusting structure and an unlocking position separated from the adjusting structure. According to the technical scheme, the problem that the universality of the vertebral plate fixing plate product is poor due to the fact that the angle of the vertebral plate in the related technology is fixed is effectively solved.

Description

Vertebral lamina opening device

Technical Field

The invention relates to the technical field of medical appliances, in particular to a vertebral plate opening device.

Background

Laminoplasty is a type of cervical spinal decompression that does not require fusion and remains active. The posterior tension band can be reserved, and the patient is allowed to bear more physiological load. At the same time, laminoplasty retains the dorsal covered dura and, if necessary, allows for safe repair procedures.

In the related art, if the opening angle of the vertebral body in the single-door operation is too small, the decompression effect is difficult to realize; if the vertebral body opening angle is too large, the hinge side lamina may be completely fractured. At present, the existing vertebral plate fixing plate product is fixed in design angle, the vertebral plate fixing plate with a proper angle cannot be selected according to the specific condition of a patient, and personalized surgery is required, namely the universality of the existing vertebral plate fixing plate product is poor.

Disclosure of Invention

The invention mainly aims to provide a vertebral plate expanding device which is used for solving the problem that the universality of a vertebral plate fixing plate product is poor due to the fact that the angle of a vertebral plate in the related technology is fixed.

In order to achieve the above object, the present invention provides a laminboard distracting device comprising: a first connection portion and a second connection portion; a connection structure connected between the first connection portion and the second connection portion; the adjusting structure is arranged on the connecting structure and connected with the first connecting part, and can drive the first connecting part to swing relative to the connecting structure; and the locking structure is arranged on the connecting structure and provided with a locking position in locking fit with the adjusting structure and an unlocking position separated from the adjusting structure.

Further, connection structure is including connecting the box, and adjusting structure and locking structure all set up in connecting the box, and one side of connecting the box towards first connecting portion is provided with first portion of dodging, is provided with on the lateral wall of connecting the box with first portion of dodging the second portion of dodging intercommunication, first connecting portion inserts the inside to connecting the box through first portion of dodging and is connected with adjusting structure, and first connecting portion can swing to the second portion of dodging in.

Further, the adjusting structure comprises a rotating piece, the axis of the rotating piece is perpendicular to the connecting line of the first connecting portion and the second connecting portion, the first connecting portion is connected with the rotating piece, and the rotating piece rotates to drive the first connecting portion to swing.

Further, the rotating member comprises a worm, the adjusting structure further comprises a gear, the rotating member is connected with the gear, the gear is meshed with the worm, and the rotating member rotates to enable the gear to drive the worm to rotate.

Further, the locking structure comprises a locking plate which can be inserted into a gap between two adjacent teeth of the gear.

Further, the first end of the lock plate is hinged with the bottom wall of the connection box, and the locking structure further comprises a first elastic piece, wherein the first elastic piece is connected between the lock plate and the side wall of the connection box, and the first elastic piece applies an elastic force to the lock plate in the direction towards the gear.

Further, the adjusting structure further comprises a rotating column, a knob and a second elastic piece, a first accommodating space is formed in the rotating column, the second elastic piece is arranged in the first accommodating space and connected with the knob, and when the knob moves towards the rotating column to squeeze the second elastic piece, the knob can push the lock plate to separate the lock plate from the gear.

Further, the lock plate includes main part and sets up first lug and the second lug on main part, and first lug and second lug set up along the length direction interval of the lock plate and all extend towards one side of gear, and first lug and gear locking cooperation, second lug set up with the knob relatively.

Further, the vertebral plate opening device further comprises a rotation stopping structure, the rotation stopping structure is arranged between the rotating column and the knob, the rotation stopping structure comprises a groove and an inserting block, one of the groove and the inserting block is arranged on the rotating column, the other of the groove and the inserting block is arranged on the knob, and when the knob moves towards the rotating column, the inserting block can be inserted into the groove.

Further, the first connecting portion includes a first bending plate including a first plate segment and a second plate segment, the first plate segment is located between the second plate segment and the connecting structure, and an included angle is formed between the first plate segment and the second plate segment.

Further, the second connecting portion comprises a second bending plate, the second bending plate comprises a third plate section and a fourth plate section, the third plate section is located between the fourth plate section and the connecting structure, an included angle is formed between the third plate section and the fourth plate section, and the extending directions of the fourth plate section and the second plate section are opposite.

Further, the second connecting portion still includes first connecting plate and second connecting plate, first connecting plate is connected with the fourth board section, be provided with second accommodation space in the fourth board section, second accommodation space extends along the length direction of fourth board section, be provided with third accommodation space in the first connecting plate, third accommodation space and second accommodation space intercommunication, lamina strutting arrangement still includes third elastic component and connecting piece, the third elastic component is connected between the lateral wall that third accommodation space was kept away from in first end and the second accommodation space of connecting piece, the second end of connecting piece passes third accommodation space and is connected with the second connecting plate, the second connecting plate can be close to or keep away from for first connecting plate.

Further, a space is formed between the first connecting plate and the second connecting plate, the vertebral plate expanding device further comprises a fourth elastic piece, the fourth elastic piece is arranged between the first connecting plate and the second connecting plate, and/or a scale value is arranged on the connecting piece.

By applying the technical scheme of the invention, the connecting structure is connected between the first connecting part and the second connecting part. The adjusting structure is arranged on the connecting structure and connected with the first connecting part, and the adjusting structure can drive the first connecting part to swing relative to the connecting structure. The locking structure is disposed on the connecting structure and has a locking position in locking engagement with the adjustment structure and an unlocking position separated from the adjustment structure. Through foretell setting, first connecting portion can swing for connection structure, specifically, adjusts the structure and can realize the regulation to the position of first connecting portion to under locking structure's effect, can lock the structure of adjusting and then realize the locking to the position of first connecting portion effectively. Thus, the vertebral plate expanding device can be adapted to different patients, and the universality of the vertebral plate expanding device can be further ensured. Therefore, the technical scheme of the application effectively solves the problem that the angle of the vertebral plate in the related technology is fixed, and the universality of the vertebral plate fixing plate product is poor.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic perspective view of an embodiment of a laminectomy device in accordance with the present invention;

FIG. 2 shows a schematic exploded view of the laminectomy distraction device of FIG. 1;

FIG. 3 shows a schematic cross-sectional view of the laminectomy device of FIG. 1;

FIG. 4 shows a partial enlarged view of the laminectomy device of FIG. 3 at A;

FIG. 5 shows a schematic perspective view of the connecting structure of the laminectomy distraction device of FIG. 1;

FIG. 6 shows an exploded view of the connection structure of FIG. 5;

FIG. 7 shows a schematic cross-sectional view of the connection structure of FIG. 5;

FIG. 8 illustrates a schematic perspective view of a second connection of the laminectomy distractor device of FIG. 1;

fig. 9 is an exploded view showing the second connection part of fig. 8;

FIG. 10 shows a schematic cross-sectional view of the second connection of FIG. 8;

fig. 11 is a schematic perspective view showing a part of the structure of the second connection part of fig. 8.

Wherein the above figures include the following reference numerals:

10. a first connection portion; 11. a first bending plate; 111. a first plate segment; 112. a second plate segment; 20. a second connecting portion; 21. a second bending plate; 211. a third plate segment; 212. a fourth plate segment; 2121. a second accommodation space; 22. a first connection plate; 221. a third accommodation space; 23. a second connecting plate; 30. a connection structure; 31. a connection box; 311. a first avoidance unit; 312. a second avoidance unit; 40. an adjustment structure; 41. a rotating member; 411. a worm; 42. a gear; 43. rotating the column; 431. a first accommodation space; 44. a knob; 45. a second elastic member; 50. a locking structure; 51. a lock plate; 511. a main body portion; 512. a first bump; 513. a second bump; 52. a first elastic member; 60. a rotation stopping structure; 61. a groove; 62. inserting blocks; 71. a third elastic member; 72. a connecting piece; 73. and a fourth elastic member.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 to 3, in the present embodiment, the laminectomy device includes: the first connection portion 10, the second connection portion 20, the connection structure 30, the adjustment structure 40, and the locking structure 50. The connection structure 30 is connected between the first connection part 10 and the second connection part 20. The adjusting structure 40 is disposed on the connecting structure 30 and connected to the first connecting portion 10, and the adjusting structure 40 can drive the first connecting portion 10 to swing relative to the connecting structure 30. The locking structure 50 is provided on the connecting structure 30 and has a locking position in locking engagement with the adjustment structure 40 and an unlocking position separated from the adjustment structure 40.

By applying the technical solution of the present embodiment, the connection structure 30 is connected between the first connection portion 10 and the second connection portion 20. The adjusting structure 40 is disposed on the connecting structure 30 and connected to the first connecting portion 10, and the adjusting structure 40 can drive the first connecting portion 10 to swing relative to the connecting structure 30. The locking structure 50 is provided on the connecting structure 30 and has a locking position in locking engagement with the adjustment structure 40 and an unlocking position separated from the adjustment structure 40. With the above arrangement, the first connection portion 10 can be swung with respect to the connection structure 30, specifically, the adjustment structure 40 can realize adjustment of the position of the first connection portion 10, and the adjustment structure 40 can be effectively locked under the action of the locking structure 50, thereby realizing locking of the position of the first connection portion 10. Thus, the vertebral plate expanding device can be adapted to different patients, and the universality of the vertebral plate expanding device can be further ensured. Therefore, the technical scheme of the embodiment effectively solves the problem that the angle of the vertebral plate in the related technology is fixed, and the universality of the vertebral plate fixing plate product is poor.

In an embodiment not shown in the figures, the second connection 20 is arranged swingably with respect to the connection structure 30.

As shown in fig. 1 to 7, in the present embodiment, the connection structure 30 includes a connection box 31, the adjustment structure 40 and the locking structure 50 are both disposed in the connection box 31, a first avoidance portion 311 is disposed on one side of the connection box 31 toward the first connection portion 10, a second avoidance portion 312 communicating with the first avoidance portion 311 is disposed on a side wall of the connection box 31, the first connection portion 10 is inserted into the connection box 31 through the first avoidance portion 311 and connected with the adjustment structure 40, and the first connection portion 10 can swing into the second avoidance portion 312. The connection box 31 can effectively accommodate the adjusting structure 40 and the locking structure 50, so that the adjusting structure 40 and the locking structure 50 can be protected, the first avoidance portion 311 and the second avoidance portion 312 can avoid the first connection portion 10, and therefore the first connection portion 10 can swing, and further adjustment of the angle between the first connection portion 10 and the connection box 31 can be achieved.

The connection box 31 includes a box main body and an upper cover fixed to the box main body by screws. The upper cover is provided with the briquetting, and the briquetting sets up in the one side of upper cover towards second connecting portion, and the briquetting can compress tightly second connecting portion, and then makes the position of second connecting portion more stable.

As shown in fig. 4 to 7, in the present embodiment, the adjusting structure 40 includes a rotating member 41, an axis of the rotating member 41 is perpendicular to a connection line between the first connecting portion 10 and the second connecting portion 20, the first connecting portion 10 is connected to the rotating member 41, and the rotating member 41 rotates to drive the first connecting portion 10 to swing. The rotating member 41 is in driving connection with the first connecting portion 10, so that the first connecting portion 10 can be driven to swing when the rotating member 41 rotates, and the first connecting portion 10 can swing easily due to the arrangement.

As shown in fig. 4 to 7, in the present embodiment, the rotating member 41 includes a worm 411, the adjusting structure 40 further includes a gear 42, the rotating member 41 is connected to the gear 42, the gear 42 is disposed in engagement with the worm 411, and the rotating member 41 rotates to rotate the gear 42 to drive the worm 411. The gear 42 and the worm 411 are meshed, the worm 411 can be driven to rotate when the gear 42 rotates, the first connecting portion 10 can be driven to swing, meanwhile, the gear 42 and the worm 411 are matched to enable a driving mode to be simpler, and the setting is convenient.

As shown in fig. 4 to 7, in the present embodiment, the lock structure 50 includes a lock plate 51, and the lock plate 51 can be inserted into a gap between two adjacent teeth of the gear 42. The lock plate 51 has a simple structure and is convenient to set, and the lock plate 51 can be inserted into a gap between two adjacent teeth of the gear 42, so that the rotation of the gear 42 can be limited, and the worm 411 can not rotate, thereby ensuring the position of the first connecting portion 10. While the provision of the locking structure 50 enables the first connection portion 10 to hover at any position.

As shown in fig. 4 to 7, in the present embodiment, the first end of the lock plate 51 is hingedly connected to the bottom wall of the connection box 31, and the locking structure 50 further includes a first elastic member 52, the first elastic member 52 being connected between the lock plate 51 and the side wall of the connection box 31, the first elastic member 52 exerting an elastic force on the lock plate 51 in the direction toward the gear 42. The first end of the locking plate 51 is hinged to the bottom wall of the connection box 31, so that the position of the locking plate 51 is more stable, and the locking plate 51 can be driven to be inserted into a gap between two adjacent teeth of the gear 42 under the action of the first elastic piece 52, so that the locking plate 51 is always inserted into the gap between two adjacent teeth of the gear 42 when the gear 42 is not required to be rotated, and limiting of the gear 42 can be guaranteed.

As shown in fig. 4 to 7, in the present embodiment, the adjusting structure 40 further includes a rotating post 43, a knob 44, and a second elastic member 45, wherein a first accommodating space 431 is provided inside the rotating post 43, the second elastic member 45 is disposed in the first accommodating space 431 and connected with the knob 44, and when the knob 44 moves toward the rotating post 43 to press the second elastic member 45, the knob 44 can push the lock plate 51 to separate the lock plate 51 from the gear 42. The first receiving space 431 can receive the second elastic member 45 and effectively couple the rotation post 43 and the knob 44 together by the second elastic member 45. When the knob 44 is moved toward the rotation post 43, the second elastic member 45 is compressed, and the side wall of the knob 44 can push the lock plate 51 to separate the lock plate 51 from the gear 42, so that the driving of the gear 42 is achieved while unlocking.

Specifically, the knob 44 is provided with an indication part, the connection box 31 is provided with angle scale values of 0 degree, 30 degrees, 60 degrees and 90 degrees, and when the knob 44 rotates, the indication part can correspond to different angle scale values, so that medical staff can know the swinging angle of the first connection part 10 conveniently.

As shown in fig. 4 to 7, in the present embodiment, the lock plate 51 includes a main body portion 511, and first and second projections 512 and 513 provided on the main body portion 511, the first and second projections 512 and 513 being provided at intervals along a length direction of the lock plate 51 and each extending toward one side of the gear 42, the first projection 512 being in locking engagement with the gear 42, the second projection 513 being provided opposite to the knob 44. The first projection 512 is in plug-in fit with the gear 42, the second projection 513 is in fit with the knob 44, and this arrangement can make it easier for the lock plate 51 to lock the gear 42, and the knob 44 can also drive the lock plate 51.

Be provided with downwardly extending's enclosing wall on the knob, the enclosing wall can with the cooperation of second lug butt, and one side of second lug orientation enclosing wall is provided with the arcwall face, can prevent like this to appear the dead condition of card between second lug and the enclosing wall. Meanwhile, the length of the second lug is larger than that of the first lug, and locking and unlocking can be guaranteed through the arrangement.

Preferably, the thickness of the first bump 512 gradually increases from the direction approaching the gear 42 to the direction separating from the gear 42, so that the first bump 512 is easier to be inserted into the gear 42.

As shown in fig. 4 to 7, in the present embodiment, the laminboard distractor further includes a rotation stopping structure 60, the rotation stopping structure 60 is disposed between the rotation post 43 and the knob 44, the rotation stopping structure 60 includes a groove 61 and an insert 62, one of the groove 61 and the insert 62 is disposed on the rotation post 43, the other of the groove 61 and the insert 62 is disposed on the knob 44, and the insert 62 can be inserted into the groove 61 when the knob 44 moves toward the rotation post 43. The rotation stopping structure 60 can effectively realize synchronous rotation of the knob 44 and the rotating column 43, namely, the inserting block 62 and the groove 61 can be in inserting fit when the knob 44 moves downwards. Meanwhile, the plug 62 and the groove 61 are simple in structure and convenient to set.

Specifically, in the present embodiment, the groove 61 is provided on the rotation post 43 and communicates with the first receiving space 431, and the insertion block 62 is provided on the knob 44.

The adjustment process of the laminectomy device of this embodiment is as follows:

the knob 44 is pressed down to compress the second elastic member 45, and in the process of pressing down the knob 44, the lock plate 51 can be pushed to move from the locking position to the unlocking position, and meanwhile, the insert block 62 is inserted into the groove 61, so that the knob 44 and the rotating post 43 can synchronously rotate, and the angle of the first connecting portion 10 is adjusted. After the adjustment is completed, the knob 44 is loosened, the knob 44 moves upwards under the action of the second elastic piece 45 and avoids the lock plate 51, and the lock plate 51 is driven to move from the unlocking position to the locking position under the action of the first elastic piece 52, so that the gear 42 is limited, and the position of the first connecting portion 10 is more stable.

As shown in fig. 1 to 3, in the present embodiment, the first connecting portion 10 includes a first bending plate 11, the first bending plate 11 includes a first plate section 111 and a second plate section 112, the first plate section 111 is located between the second plate section 112 and the connecting structure 30, and an included angle is formed between the first plate section 111 and the second plate section 112. The above arrangement can effectively realize the connection with the vertebral body.

As shown in fig. 1 to 3 and fig. 8 to 11, in the present embodiment, the second connecting portion 20 includes a second bending plate 21, the second bending plate 21 includes a third plate segment 211 and a fourth plate segment 212, the third plate segment 211 is located between the fourth plate segment 212 and the connecting structure 30, an included angle is formed between the third plate segment 211 and the fourth plate segment 212, and the extending directions of the fourth plate segment 212 and the second plate segment 112 are opposite. The second bending plate 21 can be connected with the vertebral body in the same way, namely, the first bending plate 11 and the second bending plate 21 are respectively positioned at two sides of the opening on the vertebral body, so that the position and the size of the opening of the vertebral body can be ensured.

As shown in fig. 1 to 3 and fig. 8 to 11, in the present embodiment, the second connection part 20 further includes a first connection plate 22 and a second connection plate 23, the first connection plate 22 is connected with the fourth plate section 212, a second receiving space 2121 is provided in the fourth plate section 212, the second receiving space 2121 extends along the length direction of the fourth plate section 212, a third receiving space 221 is provided in the first connection plate 22, the third receiving space 221 is communicated with the second receiving space 2121, the laminboard distracting device further includes a third elastic member 71 and a connection member 72, the third elastic member 71 is connected between a first end of the connection member 72 and a side wall of the second receiving space 2121 away from the third receiving space 221, a second end of the connection member 72 passes through the third receiving space 221 and is connected with the second connection plate 23, and the second connection plate 23 can be close to or far away from the first connection plate 22. The second connecting plate 23 includes a fifth plate segment and a sixth plate segment, and an included angle is formed between the fifth plate segment and the sixth plate segment, and meanwhile, a U-shaped groove is formed among the sixth plate segment, the fifth plate segment, the first connecting plate 22 and the fourth plate segment 212, and the U-shaped groove is inserted into an opening of the vertebral body, that is, the fourth plate segment 212 and the sixth plate segment are respectively located at the inner side and the outer side of the vertebral body. Meanwhile, the sixth plate section and the fourth plate section 212 can be mutually close to or far away from each other under the action of the connecting piece 72, so that the vertebral body can be effectively clamped, and the connection stability of the second connecting portion 20 and the vertebral body is better.

The extending direction of the second accommodating space 2121 and the extending direction of the third accommodating space 221 are perpendicular, a guide wheel is arranged at the intersection of the second accommodating space 2121 and the third accommodating space 221, and the connecting piece 72 is wound on the guide wheel, so that the movement of the connecting piece 72 is easier.

Meanwhile, it should be noted that, since the sixth plate segment and the fourth plate segment 212 can be close to each other or far away from each other, the second connecting portion 20 can adapt to vertebral bodies with different sizes, i.e. can be aimed at vertebral bodies with different thicknesses.

As shown in fig. 1 to 3 and fig. 8 to 11, in the present embodiment, a space is provided between the first connecting plate 22 and the second connecting plate 23, and the laminboard distracting device further includes a fourth elastic member 73, the fourth elastic member 73 is disposed between the first connecting plate 22 and the second connecting plate 23, and the connecting member 72 is provided with scale values. Under the action of the fourth elastic member 73, the first connecting plate 22 and the second connecting plate 23 can be further connected together, and the fourth elastic member 73 can pull the first connecting plate 22 and the second connecting plate 23 closer together, so that the second connecting portion 20 can clamp the vertebral body more easily. Meanwhile, the scale values can be set to effectively read, so that more data can be obtained, and corresponding products can be conveniently processed later.

Specifically, under the action of the third elastic member 71 and the fourth elastic member 73, the first connecting plate 22 and the second connecting plate 23 can be pulled closer all the time, so that the clamping stability is better.

The first connecting portion 10 in the laminboard distraction device of the present embodiment can swing and has a locking function, and simultaneously the first connecting portion 10 can lock at any angle and any position, so that the universality of the laminboard distraction device is better. The swinging angle of the first connecting part 10 can be read when the knob 44 rotates, so that the medical staff can know the swinging angle.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laminectomy distraction device comprising:

a first connection part (10) and a second connection part (20);

a connection structure (30) connected between the first connection portion (10) and the second connection portion (20);

an adjustment structure (40) arranged on the connection structure (30) and connected with the first connection part (10), wherein the adjustment structure (40) can drive the first connection part (10) to swing relative to the connection structure (30);

a locking structure (50) is provided on the connecting structure (30) and has a locking position in locking engagement with the adjustment structure (40) and an unlocking position separated from the adjustment structure (40).

2. The vertebral plate distracting device according to claim 1, characterized in that the connecting structure (30) comprises a connecting box (31), the adjusting structure (40) and the locking structure (50) are both arranged in the connecting box (31), a first avoiding portion (311) is arranged on one side of the connecting box (31) towards the first connecting portion (10), a second avoiding portion (312) communicated with the first avoiding portion (311) is arranged on the side wall of the connecting box (31), the first connecting portion (10) is inserted into the connecting box (31) through the first avoiding portion (311) and is connected with the adjusting structure (40), and the first connecting portion (10) can swing into the second avoiding portion (312).

3. The laminboard distractor device of claim 2, wherein the adjustment structure (40) includes a rotating member (41), an axis of the rotating member (41) is perpendicular to a line connecting the first connecting portion (10) and the second connecting portion (20), the first connecting portion (10) is connected with the rotating member (41), and the rotating member (41) rotates to drive the first connecting portion (10) to swing.

4. A laminboard distractor according to claim 3, wherein the rotating member (41) comprises a worm (411), the adjustment structure (40) further comprises a gear (42), the rotating member (41) is connected to the gear (42), the gear (42) is meshed with the worm (411), and the rotating member (41) rotates to rotate the gear (42) to drive the worm (411).

5. The lamina distraction device according to claim 4, wherein said locking structure (50) comprises a locking plate (51), said locking plate (51) being insertable into a gap between two adjacent teeth of said gear (42).

6. The lamina distraction device according to claim 5, wherein the first end of the locking plate (51) is hinged to the bottom wall of the connection box (31), the locking structure (50) further comprising a first elastic member (52), the first elastic member (52) being connected between the locking plate (51) and the side wall of the connection box (31), the first elastic member (52) exerting an elastic force on the locking plate (51) in the direction of the gear (42).

7. The lamina distraction device according to claim 5, wherein said adjustment structure (40) further comprises a rotation post (43), a knob (44) and a second elastic member (45), a first accommodation space (431) is provided inside said rotation post (43), said second elastic member (45) is provided inside said first accommodation space (431) and is connected with said knob (44), and said knob (44) can push against said locking plate (51) to separate said locking plate (51) from said gear (42) when said knob (44) moves toward said rotation post (43) to press said second elastic member (45).

8. The lamina distraction device according to claim 7, wherein said locking plate (51) comprises a main body (511) and first and second protrusions (512, 513) provided on said main body (511), said first and second protrusions (512, 513) being provided at intervals along the length direction of said locking plate (51) and extending toward one side of said gear (42), said first protrusion (512) being in locking engagement with said gear (42), said second protrusion (513) being provided opposite said knob (44).

9. The lamina distraction device according to claim 7, further comprising a rotation stopping structure (60), said rotation stopping structure (60) being arranged between said rotation post (43) and said knob (44), said rotation stopping structure (60) comprising a groove (61) and an insert (62), one of said groove (61) and said insert (62) being arranged on said rotation post (43), the other of said groove (61) and said insert (62) being arranged on said knob (44), said insert (62) being insertable into said groove (61) when said knob (44) is moved towards said rotation post (43).

10. The lamina distraction device according to any one of claims 1 to 9, wherein the first connection (10) comprises a first bending plate (11), the first bending plate (11) comprising a first plate section (111) and a second plate section (112), the first plate section (111) being located between the second plate section (112) and the connection structure (30), the first plate section (111) and the second plate section (112) having an angle therebetween.

11. The lamina distraction device according to claim 10, wherein said second connection portion (20) comprises a second bending plate (21), said second bending plate (21) comprising a third plate section (211) and a fourth plate section (212), said third plate section (211) being located between said fourth plate section (212) and said connection structure (30), said third plate section (211) and said fourth plate section (212) having an angle therebetween, said fourth plate section (212) and said second plate section (112) extending in opposite directions.

12. The lamina distraction device according to claim 11, wherein the second connection part (20) further comprises a first connection plate (22) and a second connection plate (23), the first connection plate (22) is connected with the fourth plate section (212), a second accommodation space (2121) is provided in the fourth plate section (212), the second accommodation space (2121) extends along the length direction of the fourth plate section (212), a third accommodation space (221) is provided in the first connection plate (22), the third accommodation space (221) and the second accommodation space (2121) are communicated, the lamina distraction device further comprises a third elastic member (71) and a connection member (72), the third elastic member (71) is connected between a first end of the connection member (72) and a side wall of the second accommodation space (2121) away from the third accommodation space (221), and a second end of the connection member (72) penetrates through the third accommodation space (221) and is capable of being connected with the second connection plate (23) or being moved away from the first connection plate (23).

13. The lamina distraction device according to claim 12, wherein a space is provided between the first connection plate (22) and the second connection plate (23), the lamina distraction device further comprising a fourth elastic member (73), the fourth elastic member (73) being arranged between the first connection plate (22) and the second connection plate (23), and/or the connection member (72) being provided with graduation values.