Orthopedic vertebral plate operation bone rongeur

Abstract

The utility model discloses a bone rongeur for an orthopedic vertebral plate operation, which belongs to the technical field of medical instruments and comprises a fixed forceps handle, a movable forceps handle rotationally connected with the fixed forceps handle through a rotary connecting component and a bone rongeur piece mounted at one end of the fixed forceps handle and one end of the movable forceps handle. The bone rongeur piece comprises a fixed rod and an occlusion rod connected to the interior of the fixed rod in a sliding mode, the occlusion rod and the fixed rod are connected through a first spring, an elastic piece is connected between the fixed forceps handle and the movable forceps handle, and when the movable forceps handle rotates to drive an extrusion part at the end of the movable forceps handle to extrude the occlusion rod, the elastic piece is connected with the fixed forceps handle. By means of the locking mechanism, locking can be conducted when the rongeur is meshed to a certain degree, secondary meshing can be conducted through the previous locking position, the accuracy of the rongeur operation can be improved, the rongeur depth and range can be better controlled especially in the operation of fine parts such as a vertebral plate, and the rongeur is suitable for being used in the operation of the fine parts such as the vertebral plate and the like. And the damage to surrounding tissues is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bone-biting device for orthopedic vertebral laminectomy. Background Technology

[0002] Orthopedic laminectomy forceps are medical instruments specifically used in orthopedic surgery to remove bone from the vertebral lamina, especially in laminectomy. They are used to remove bone from the vertebral lamina to expose structures within the spinal canal, such as the spinal cord and nerve roots, creating conditions for subsequent decompression and repair procedures. The laminectomy forceps need to have appropriate biting force to break the bone from the vertebral lamina, but at the same time, they must ensure the precision of the operation to avoid over-biting or damaging important surrounding nerves, blood vessels, and other structures.

[0003] Currently, during bone-breaking procedures, due to the hardness of the bone, it may not be possible to break the bone in one go using bone-breaking forceps. Doctors may loosen the forceps and then tighten them again, performing multiple bites. Each bite applies increasing force, and the bone is gradually broken through repeated bites. However, during subsequent bites, the biting point of the forceps may change, making it impossible to accurately bite the previously biting area and ensuring bite precision.

[0004] Therefore, we propose an orthopedic laminectomy bone-biting instrument to solve the aforementioned problems. Utility Model Content

[0005] This utility model provides an orthopedic laminectomy bone-biting instrument to solve the aforementioned technical problems.

[0006] This utility model embodiment adopts the following technical solution: it includes a fixed clamp handle, a movable clamp handle rotatably connected to the fixed clamp handle via a rotating connecting assembly, and a bone-biting component installed at one end of the fixed clamp handle and the movable clamp handle. The bone-biting component includes a fixed rod and a biting rod slidably connected inside the fixed rod. The biting rod and the fixed rod are connected by a first spring. An elastic element is connected between the fixed clamp handle and the movable clamp handle. When the movable clamp handle rotates, it drives the pressing part at its end to press the biting rod. The biting rod compresses the first spring and moves towards the end of the fixed rod to realize the bone-biting action. It also includes a one-way locking mechanism provided between the fixed clamp handle and the movable clamp handle. The one-way locking mechanism is used to lock the rotation position of the movable clamp handle when the movable clamp handle is pressed, so as to realize that the bone-biting component is stably maintained in the current biting position. The movable clamp handle is also provided with an unlocking mechanism for releasing the one-way locking mechanism.

[0007] Furthermore, the one-way locking mechanism includes an arc-shaped rack connected to the fixed clamp handle and a locking sleeve connected to the movable clamp handle. The inner wall of the locking sleeve is connected by a second spring to a positioning tooth whose inclined surface is opposite to the inclined surface of the arc-shaped rack teeth. When the positioning tooth is engaged between two adjacent teeth of the arc-shaped rack under the action of the second spring, one-way locking of the movable clamp handle is achieved.

[0008] Furthermore, the unlocking mechanism includes an unlocking rod movably connected to the movable clamp handle. One end of the unlocking rod is provided with a first wedge-shaped abutment, and the end of the positioning tooth is provided with a second wedge-shaped abutment extending to the outside of the locking sleeve. When the unlocking rod drives the inclined surface of the first wedge-shaped abutment to abut against the inclined surface of the second wedge-shaped abutment, the positioning tooth can be moved out from the two adjacent teeth of the arc-shaped rack.

[0009] Furthermore, a return spring is connected between the end of the unlocking rod away from the first wedge-shaped contact part and the movable clamp handle.

[0010] Furthermore, the rotating connection assembly includes two connecting rods that can be threadedly connected to each other, and both the movable clamp and the fixed clamp are provided with through holes through which the connecting rods can pass.

[0011] Furthermore, the inner wall of the fixing clamp handle is provided with a limiting part. When the biting bone component abuts against the limiting part, the through hole on the biting bone component coincides with the axis of the connecting rod.

[0012] Furthermore, one end of the biting rod is detachably connected to a compression cap for contacting the compression part of the movable clamp.

[0013] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0014] In this invention, a locking mechanism can lock the bone-biting forceps when they have engaged to a certain extent, allowing for re-engagement from the previously locked position. This helps improve the precision of bone-biting operations, especially in surgeries on delicate areas such as the vertebral laminae. It allows for better control of the depth and range of bone biting, reduces damage to surrounding tissues, and prevents the moving forceps handle from rotating in the opposite direction due to accidental contact or other reasons during surgery. This maintains the engagement position of the bone-biting forceps and increases the stability of the surgical procedure. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 Provided by this utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 4 This is an exploded structural diagram of the present invention;

[0020] Figure 5 This is an exploded view of the movable and fixed clamp handles in this utility model.

[0021] Figure 6 This is an exploded structural diagram of the interlocking component in this utility model.

[0022] Figure Labels

[0023] Fixed clamp handle 1, limiting part 11, movable clamp handle 2, biting bone part 3, fixed rod 31, biting rod 32, first spring 33, compression cap 34, elastic element 4, one-way locking mechanism 5, arc-shaped rack 51, locking sleeve 52, second spring 53, positioning tooth 54, unlocking mechanism 6, unlocking rod 61, first wedge-shaped contact part 62, second wedge-shaped contact part 63, return spring 64, connecting rod body 7. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0026] This utility model provides an orthopedic laminectomy bone-biting instrument, including a fixed clamp handle 1, one end of which is rotatably connected to a movable clamp handle 2 via a rotating connecting assembly. A bone-biting component 3 is installed at one end of both the fixed clamp handle 1 and the movable clamp handle 2. The bone-biting component 3 includes a fixed rod 31 and a biting rod 32 slidably connected inside the fixed rod 31. When one end of the biting rod 32 moves towards one end of the fixed rod 31, it can clamp the vertebral region through the fixed rod 31 and the biting rod 32, and the bone-biting action is achieved as the compression force increases. The biting rod 32 is connected to the fixed rod 31 via a first spring 33. An elastic element 4 is connected between the fixed clamp handle 1 and the movable clamp handle 2. When the movable clamp handle 2 is pressed to compress the elastic element 4 (which can be a spring, etc.), the movable clamp handle 2 rotates around the rotating connecting assembly, causing its end compression part to compress the biting rod 32, thus achieving the biting action. The rod 32 compresses the first spring 33 and moves towards the end of the fixed rod 31 to achieve the bone-biting action. However, when the pressure on the movable clamp handle 2 is released, the elastic force of the elastic element 4 and the first spring 33 will cause the biting rod 32 to disengage from the end of the fixed rod 31, thereby releasing the bone-biting action. If the vertebra in this part is not bitten off, it is necessary to bite again. When the bone-biting is performed again, the biting position of the bone-biting clamp may change, and it may not be able to accurately bite the previously biting position. Therefore, a one-way locking mechanism 5 is connected between the fixed clamp handle 1 and the movable clamp handle 2 to make the bone-biting part 3 stably maintain the current biting position. When the bone-biting clamp bites to a certain extent, it locks, so that the biting can be performed through the previous locking position when biting again, thereby improving the accuracy of the bone-biting operation. In addition, in order to facilitate the replacement of the biting position, an unlocking mechanism 6 is also provided on the movable clamp handle 2 for releasing the one-way locking mechanism 5.

[0027] Specifically, the one-way locking mechanism 5 includes an arc-shaped rack 51 connected to the fixed clamp handle 1 and a locking sleeve 52 connected to the movable clamp handle 2. The arc-shaped rack 51 has multiple teeth with inclined surfaces along its arc trajectory. The inner wall of the locking sleeve 52 is connected by a second spring 53 to a positioning tooth 54 whose inclined surface is opposite to the inclined surface of the teeth of the arc-shaped rack 51. When the movable clamp handle 2 is pressed, the arc-shaped rack 51 will enter into the locking sleeve 52. At this time, the inclined surface of the teeth will abut against the inclined surface of the positioning tooth 54, thereby compressing the second spring 53 and causing the positioning tooth 54 to move upward. Then, under the elastic force of the second spring 53, it will lock between two adjacent teeth of the arc-shaped rack 51, thereby achieving one-way locking of the movable clamp handle 2 and preventing the movable clamp handle 2 from moving in the opposite direction under the action of the elastic element 4.

[0028] The unlocking mechanism 6 includes an unlocking rod 61 movably connected to the movable clamp handle 2. One end of the unlocking rod 61 is provided with a first wedge-shaped abutment 62, and the end of the positioning tooth 54 is provided with a second wedge-shaped abutment 63 extending to the outside of the locking sleeve 52. The unlocking mechanism 6 is located at the lower end of the movable clamp handle 2. When the movable clamp handle 2 is pressed normally, the hand should avoid touching the unlocking mechanism 6. When the unlocking mechanism 6 needs to be unlocked, the little finger of the hand pressing the movable clamp handle 2 can be used to press the unlocking rod 61, so that the unlocking rod 61 drives the inclined surface of the first wedge-shaped abutment 62 to abut against the inclined surface of the second wedge-shaped abutment 63, thereby driving the positioning tooth 54 to compress the second spring 53 and move out from the two adjacent teeth of the arc-shaped rack 51. At this time, the movable clamp handle 2 can be reset.

[0029] Preferably, a return spring 64 is connected between the end of the unlocking lever 61 away from the first wedge-shaped contact part 62 and the movable clamp handle 2. When the pressure on the unlocking lever 61 is released, the return spring 64 can drive the first wedge-shaped contact part 62 to move away from the second wedge-shaped contact part 63, thereby preventing the unlocking lever 61 from accidentally hitting the second wedge-shaped contact part 63 and causing a false lock.

[0030] Preferably, the rotating connection assembly includes two connecting rods 7 that can be threadedly connected to each other. Both the movable jaw 2 and the fixed jaw 1 have through holes through which the connecting rods 7 can pass. When assembling the movable jaw 2, the fixed jaw 1, and the clamping member, the movable jaw 2 is first installed in the fixed jaw 1. Then, one end of the clamping member is inserted into the cavity at one end of the fixed jaw 1. At this time, since one end of the clamping member is located in the cavity of the fixed jaw 1, it will not rotate around the connecting rod 7. The movable jaw 2 and the fixed jaw 1 are connected by the connecting rod 7, so the movable jaw 2 can rotate around the connecting rod 7. Then, the two connecting rods 7 pass through the two ends of the through hole and are threadedly connected. Thus, the connecting rod 7 can connect the movable jaw 2, the fixed jaw 1, and the clamping member, so as to facilitate the disassembly, cleaning, and disinfection of the three parts.

[0031] Preferably, the inner wall of the fixed clamp handle 1 is provided with a limiting part 11. When the biting bone piece 3 abuts against the limiting part 11, the through holes of the movable clamp handle 2, the fixed clamp handle 1, and the biting piece overlap, which facilitates the insertion of the connecting rod body 7 to fix the three parts.

[0032] Preferably, one end of the biting rod 32 is detachably connected to a compression cap 34 for contacting the compression part of the movable clamp handle 2. When disassembling and disinfecting the biting parts, the compression cap 34 can be removed first. At this time, the biting rod 32 can be pulled out from the fixed rod 31, thereby separating the two. During assembly, the biting rod 32 is passed through the fixed rod 31, and then the compression cap 34 is connected to the biting rod 32 to prevent the biting rod 32 from detaching from the fixed rod 31. Afterwards, when the movable clamp handle 2 drives the compression part to contact the compression cap 34, it can drive the biting rod 32 to move towards the end of the fixed rod 31 to perform the bone biting operation.

[0033] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An orthopedic laminectomy bone-biting instrument, comprising a fixed clamp handle (1), a movable clamp handle (2) rotatably connected to the fixed clamp handle (1) via a rotating connecting assembly, and a bone-biting component (3) installed at one end of the fixed clamp handle (1) and the movable clamp handle (2), wherein the bone-biting component (3) comprises a fixed rod (31) and a biting rod (32) slidably connected inside the fixed rod (31), the biting rod (32) and the fixed rod (31) are connected by a first spring (33), and an elastic element (4) is connected between the fixed clamp handle (1) and the movable clamp handle (2), wherein when the movable clamp handle (2) rotates and drives its end pressing part to press the biting rod (32), the biting rod (32) compresses the first spring (33) and moves toward the end of the fixed rod (31) to realize the bone-biting action, characterized in that, It also includes a one-way locking mechanism (5) located between the fixed clamp handle (1) and the movable clamp handle (2). The one-way locking mechanism (5) is used to lock the rotation position of the movable clamp handle (2) when the movable clamp handle (2) is pressed, so as to keep the bone biting piece (3) stably in the current biting position. The movable clamp handle (2) is also provided with an unlocking mechanism (6) for releasing the one-way locking mechanism (5).

2. The orthopedic laminectomy bone-biting instrument according to claim 1, characterized in that, The one-way locking mechanism (5) includes an arc-shaped rack (51) connected to the fixed clamp handle (1) and a locking sleeve (52) connected to the movable clamp handle (2). The inner wall of the locking sleeve (52) is connected by a second spring (53) to a positioning tooth (54) whose inclined surface is opposite to the inclined surface of the teeth of the arc-shaped rack (51). When the positioning tooth (54) is engaged between two adjacent teeth of the arc-shaped rack (51) under the action of the second spring (53), the one-way locking of the movable clamp handle (2) is realized.

3. The orthopedic laminectomy bone-biting instrument according to claim 2, characterized in that, The unlocking mechanism (6) includes an unlocking rod (61) movably connected to the movable clamp (2). One end of the unlocking rod (61) is provided with a first wedge-shaped contact part (62), and the end of the positioning tooth (54) is provided with a second wedge-shaped contact part (63) extending to the outside of the locking sleeve (52). When the unlocking rod (61) drives the inclined surface of the first wedge-shaped contact part (62) to contact the inclined surface of the second wedge-shaped contact part (63), the positioning tooth (54) can be moved out from the two adjacent teeth of the arc-shaped rack (51).

4. The bone-biting instrument for orthopedic laminectomy according to claim 3, characterized in that, A return spring (64) is connected between the end of the unlocking rod (61) away from the first wedge-shaped contact part (62) and the movable clamp (2).

5. The orthopedic laminectomy bone-biting instrument according to claim 1, characterized in that, The rotating connection assembly includes two connecting rods (7) that can be threaded together. Both the movable clamp (2) and the fixed clamp (1) have through holes through which the connecting rods (7) can pass.

6. The bone-biting instrument for orthopedic laminectomy according to claim 5, characterized in that, The inner wall of the fixed clamp (1) is provided with a limiting part (11). When the biting bone (3) abuts against the limiting part (11), the through hole on the biting bone (3) coincides with the axis of the connecting rod (7).

7. The orthopedic laminectomy bone-biting instrument according to claim 1, characterized in that, One end of the biting rod (32) is detachably connected to a compression cap (34) for contacting the compression part of the movable clamp (2).

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