CN212592300U

CN212592300U - Vertebral lamina rongeur

Info

Publication number: CN212592300U
Application number: CN202021205810.8U
Authority: CN
Inventors: 邢文中; 马库斯·奈斯珀; 黄家胜
Original assignee: B Braun Medical Suzhou Co Ltd
Current assignee: B Braun Medical Suzhou Co Ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-02-26
Anticipated expiration: 2030-06-24

Abstract

The utility model relates to the technical field of medical equipment, in particular to vertebral plate rongeur, which comprises a main body with a slide rail, a slide bar connected with the main body, a movable handle, a cutting edge arranged at the front end of the main body, and a locking structure which is arranged on the main body and used for switching the working state or the disassembly state of the vertebral plate rongeur, wherein the movable handle is abutted against the slide bar and can push the slide bar to move along the slide rail; the locking structure comprises a first state and a second state; when the locking structure is in a first state, the movable handle is kept to be abutted against the sliding rod under the limiting action of the locking structure, the sliding rod can normally move along the sliding rail, and at the moment, the vertebral plate rongeur is in a working state; when the locking structure is in the second state, the movable handle can move downwards, the front end of the sliding rod is lifted and separated from the movable handle, the sliding rod leaves the sliding rail, and at the moment, the vertebral plate rongeur is in a disassembly state. The utility model discloses convenient to detach, washing and disinfection need not to tear apart into the parts and can clean, have solved the problem of losing the subassembly easily.

Description

Vertebral lamina rongeur

Technical Field

The utility model relates to the technical field of medical equipment, more specifically relates to a vertebral plate rongeur.

Background

The vertebral plate rongeur is mainly applied to clinical operations, particularly neurosurgery operations, and is used for biting and cutting small bones and soft tissues. Currently, the vertebral plate rongeur used in clinic has the following problems:

most of the traditional vertebral plate rongeurs cannot be disassembled and only can be cleaned integrally. However, bone residues, tissues and the like often remain in gaps of the vertebral plate rongeur in the operation process, so that the vertebral plate rongeur is difficult to clean thoroughly, and serious consequences such as cross infection and the like are easily caused after long-term use;

some vertebral plate rongeurs which can be partially disassembled are also available in the market, but only can be disassembled into parts for cleaning, and certain requirements are made on the placement position. When cleaning and sterilizing a stack of surgical instruments, it takes a lot of time to find the mated components, and there is a risk of loss, which seriously affects the working efficiency and efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vertebral plate rongeur convenient to dismantle, wash and disinfect need not to tear into the parts and can clean, has solved the problem of losing the subassembly easily.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the vertebral plate rongeur comprises a main body with a sliding rail, a sliding rod connected with the main body, a movable handle and a locking structure, wherein the front end of the main body is provided with a cutting edge, the movable handle is abutted against the sliding rod and can push the sliding rod to move along the sliding rail, and the locking structure is arranged on the main body and used for switching the working state or the disassembly state of the vertebral plate rongeur;

the locking structure comprises a first state and a second state;

when the locking structure is in a first state, the movable handle is kept to be abutted against the sliding rod under the limiting action of the locking structure, the sliding rod can normally move along the sliding rail, and at the moment, the vertebral plate rongeur is in a working state; when the locking structure is in a second state, the movable handle can move downwards, the front end of the sliding rod is lifted and separated from the movable handle, the sliding rod leaves the sliding rail, and at the moment, the vertebral plate rongeur is in a detachable state.

Furthermore, the locking structure comprises a button shell, a button pressure spring and a button fixing pin, wherein a button inner hole for placing the button pressure spring is formed in the button shell in the axial direction, a fixing pin hole, a first groove and a second groove are formed in the button shell in the circumferential direction, the fixing pin hole is independent of the first groove and the second groove, and the first groove and the second groove are adjacently arranged in the axial direction of the button shell; the button fixing pin is embedded in the main body and is positioned in the fixing pin hole;

the movable handle is provided with a special-shaped boss;

when the locking structure is in a first state, the button pressure spring is in a non-pressed state, the special-shaped boss is movably positioned in the first groove, and at the moment, the vertebral plate rongeur is in a working state; when the locking structure is in a second state, the button pressure spring is in a pressed state, the special-shaped boss is located in the second groove, the movable handle can move downwards along the second groove, and at the moment, the vertebral plate rongeur is in a disassembled state.

Furthermore, the fixing pin hole is a long-strip-shaped through hole, the length direction of the fixing pin hole is parallel to the axial direction of the button shell, and the width of the fixing pin hole is just matched with the diameter of the cross section of the button fixing pin;

the size of the first groove is matched with that of the special-shaped boss;

the second groove is a strip-shaped groove arranged along the circumferential direction of the button shell, the second groove is communicated with the first groove, and the length of the second groove is greater than that of the first groove;

when the button pressure spring is pressed, the special-shaped boss slides to the second groove from the first groove, and the special-shaped boss can move downwards along the second groove.

Furthermore, a cheek screw is arranged on the main body; a strip-shaped hole is formed in one end, connected with the main body, of the movable handle, and the movable handle is matched with the cheek part screw through the strip-shaped hole and is connected to the main body in a crossed mode; the length direction of the strip-shaped hole is matched with the direction of the special-shaped boss moving downwards along the second groove.

As an improvement, one end of the movable handle connected with the main body is provided with a track groove, the track groove is formed by connecting an arc track groove and a linear track groove, and the linear track groove is arranged above the arc track groove; the main body is provided with a limiting pin, and the movable handle moves along the track groove through the limiting pin;

when the vertebral plate rongeur is in a working state, the limiting pin is positioned in the arc track groove, the movable handle makes curvilinear motion along the arc track groove through the limiting pin, and at the moment, the movable handle can push the sliding rod to move along the sliding rail; when the vertebral plate rongeur is in a disassembly state, the limiting pin is positioned in the linear track groove, the movable handle makes linear motion along the linear track groove through the limiting pin, and at the moment, the movable handle can move downwards to be separated from the sliding rod.

Preferably, the bottom of slide bar is equipped with the slide bar recess, it is equipped with the arch to move handle and slide bar junction, protruding and slide bar recess end face contact move handle through protruding and slide bar recess rotate the butt and promote the slide bar and follow the slide rail removes.

As an improvement, the vertebral plate rongeur further comprises a guide structure, wherein the guide structure comprises a guide shaft, a guide pressure spring and a guide limiting block, one end of the guide shaft is provided with a fixed block, the other end of the guide shaft is a free end, and the guide pressure spring and the guide limiting block are sequentially sleeved on the guide shaft; the top of the main body is provided with a placing groove positioned behind the slide rail, the front end of the placing groove is provided with a front end positioning hole, and the front end positioning hole is connected with the fixed block through a first rotating pin; the bottom of the sliding rod is provided with a middle positioning hole positioned above the placing groove, and the middle positioning hole is connected with the guide limiting block through a second rotating pin;

when the vertebral plate rongeur is in a working state, the guide shaft is arranged in the placement groove, two ends of the guide pressure spring are in a pressed state under the action of the fixed block and the guide limiting block, and the movable handle can push the sliding rod to move along the sliding rail; when the vertebral plate rongeur is in a disassembled state, the fixing block of the guide shaft is kept connected with the front end positioning hole, the guide pressure spring resets and pushes the guide limiting block which is kept connected with the slide rod, the free end of the guide shaft is separated from the placing groove under the reset action of the guide pressure spring, the front end of the slide rod is lifted, and the slide rod leaves the slide rail.

Preferably, the vertebral plate rongeur further comprises a tail limiting block, wherein the tail limiting block comprises a head part, a neck part and a sliding part which are sequentially connected; the rear end of the bottom of the sliding rod is provided with a limiting inner hole, and the head of the tail limiting block is in interference fit with the limiting inner hole; the rear end at main part top is equipped with terminal confined T type spacing groove, the size of the neck of afterbody stopper and the opening size looks adaptation in T type spacing groove, but the joint of sliding part is at T type spacing inslot and slide along T type spacing groove.

Preferably, the rear end of the bottom of the sliding rod is further provided with an auxiliary boss located at the front end of the limiting inner hole, the rear end of the top of the main body is further provided with an arc inclined plane located at the front end of the T-shaped limiting groove, and the auxiliary boss can slide along the arc inclined plane in the lifting process of the front end of the sliding rod.

Preferably, the bottom of the sliding rod is provided with a first T-shaped boss capable of moving along the sliding rail, and the front end of the bottom of the sliding rod is provided with a T-shaped groove; the front end at the top of the main body is provided with a second T-shaped boss positioned behind the cutting edge, and the second T-shaped boss is matched with the T-shaped groove.

Compared with the prior art, the vertebral plate rongeur of the utility model can be automatically disassembled, the main body is provided with a locking structure which can conveniently switch the working state or the disassembling state of the vertebral plate rongeur, after the vertebral plate rongeur is used, the sliding rod can be separated from the sliding rail only by pressing the locking structure and then pulling down the handle, namely, the front end of the sliding rod is lifted up to be automatically separated from the main body; when the vertebral plate rongeur needs to be switched back to a working state, the locking structure is reset to enable the vertebral plate rongeur to be restored to the working state only by pressing down to push the sliding rod and then pushing the movable handle upwards to the limit position.

The utility model discloses the structural design of vertebral plate rongeur can carry out thorough washing and disinfection to the gap between main part and slide bar, avoids remaining of bone sediment and soft tissue, reduces cross infection's possibility, has solved vertebral plate rongeur and has washd the difficulty, consuming time, easily lose the subassembly scheduling problem, and its dismouting easy operation, practicality are strong.

Drawings

Fig. 1 is a schematic view showing an operating state of a vertebral plate rongeur according to an embodiment of the present invention.

Fig. 2 is a second schematic view illustrating the working state of the vertebral plate rongeur according to an embodiment of the present invention.

Fig. 3 is a schematic view illustrating a disassembled state of the vertebral plate rongeur according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a sliding rod according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of the main body according to an embodiment of the present invention.

Fig. 6 is an exploded view of a locking structure according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a button housing according to an embodiment of the present invention.

Fig. 8 is a schematic structural view of a movable handle according to an embodiment of the present invention.

FIG. 9 is a partial schematic view of a disassembled state of the vertebral plate rongeur according to an embodiment of the present invention.

Fig. 10 is a schematic structural view of a guide shaft according to an embodiment of the present invention.

Fig. 11 is the structure diagram of the guiding limiting block in an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of the tail stopper in an embodiment of the present invention.

Fig. 13 is a partial schematic view of a main body according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "vertical", "horizontal", "transverse", "longitudinal", etc., it is merely for convenience of description and simplification of the description of the present invention based on the orientation or positional relationship shown in the drawings, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, the terms describing the positional relationship in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, if the terms "first," "second," and the like are used for descriptive purposes only, they are used for mainly distinguishing different devices, elements or components (the specific types and configurations may be the same or different), and they are not used for indicating or implying relative importance or quantity among the devices, elements or components, but are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 13, there is shown an embodiment of a vertebral plate rongeur according to the present invention, which comprises a main body 10 with a sliding rail 11, a sliding rod 20 connected to the main body 10, a movable handle 30, and a locking structure 40 disposed on the main body 10 for switching the working state or the disassembly state of the vertebral plate rongeur. Wherein, the front end of the main body 10 is provided with a cutting edge 12, the movable handle 30 is abutted against the sliding rod 20 and can push the sliding rod 20 to move along the sliding rail 11; the locking structure 40 includes a first state and a second state.

As shown in fig. 1 and 2, when the locking structure 40 is in the first state, the movable handle 30 is kept abutting against the sliding rod 20 under the limiting action of the locking structure 40, the user holds the main body 10 and the movable handle 30 at the same time, and the sliding rod 20 can normally move back and forth along the sliding rail 11 by pressing or loosening the movable handle 30, at this time, the vertebral plate rongeur is in the working state;

as shown in FIG. 3, when the locking structure 40 is in the second state, the movable handle 30 can move downward, the user pulls the movable handle 30 down to the extreme position, the movable handle 30 is separated from the sliding rod 20, the front end of the sliding rod 20 is lifted, the sliding rod 20 is separated from the sliding rail 11, and at this time, the vertebral plate rongeur is in the disassembled state.

It should be noted that, in the present embodiment, the vertebral plate rongeur is shown as the anterior end in the working direction; for ease of operation, the locking structure 40 is generally provided in the chin region of the body 10. The vertebral plate rongeur of the embodiment of the utility model can be automatically disassembled, the main body 10 is provided with the locking structure 40 which can conveniently switch the working state or the disassembling state of the vertebral plate rongeur, after the vertebral plate rongeur is used, the sliding rod 20 can be separated from the sliding rail 11 only by pressing the locking structure 40 and then pulling down the handle 30, namely, the front end of the sliding rod 20 is lifted up and automatically separated from the main body 10; when the vertebral plate rongeur needs to be switched back to the working state, the locking structure 40 is reset to restore the vertebral plate rongeur to the working state only by pressing down the push slide rod 20 and then pushing the moving handle 30 upwards to the limit position.

As shown in fig. 1, 2, 6, 7 and 8, the locking structure 40 includes a button housing 41, a button compression spring 42 and a button fixing pin 43, the button housing 41 is provided with a button inner hole 411 for placing the button compression spring 42 in an axial direction, the button housing 41 is provided with a fixing pin hole 412, a first groove 413 and a second groove 414 in a circumferential direction, the fixing pin hole 412 is provided independently of the first groove 413 and the second groove 414, and the first groove 413 and the second groove 414 are adjacently provided in the axial direction of the button housing 41; the button fixing pin 43 is embedded in the body 10 and is located in the fixing pin hole 412. As shown in fig. 8, the movable handle 30 is provided with a special-shaped boss 31. When the locking structure 40 is in the first state, the button pressure spring 42 is in a non-pressed state, the special-shaped boss 31 is movably positioned in the first groove 413, and at the moment, the vertebral plate rongeur is in a working state; when the locking structure 40 is in the second state, the button compression spring 42 is in a compressed state, the special-shaped boss 31 is positioned in the second groove 414, the movable handle 30 can move downwards along the second groove 414, and at the moment, the vertebral plate rongeur is in a disassembled state.

That is, in practical use, when the vertebral plate rongeur is in a working state, the movable handle 30 is pressed to push the sliding rod 20 to move forwards, and at the moment, the special-shaped boss 31 on the movable handle 30 is separated from the first groove 413; when the movable handle 30 is loosened, the sliding rod 20 moves backwards to reset, and at the moment, the special-shaped boss 31 on the movable handle 30 is positioned in the first groove 413;

when the vertebral plate rongeur is switched from the working state to the disassembly state, the movable handle 30 is loosened, the button shell 41 is pressed, the button shell 41 is embedded into the main body 10 along the fixing pin hole 412 under the action of the button fixing pin 43, meanwhile, the special-shaped boss 31 on the movable handle 30 enters the second groove 414 from the first groove 413, and the special-shaped boss 31 can move downwards along the second groove 414, namely, the movable handle 30 can be pulled downwards to the limit position; at this time, the axial position of the button shell 41 is also limited by the special-shaped boss 31, and the button pressure spring 42 is in a pressed state;

when the vertebral plate rongeur is switched from the disassembly state to the working state, the moving handle 30 is pushed upwards to the limit position, namely the special-shaped boss 31 moves from the lowest end to the uppermost end of the second groove 414, at the moment, the button compression spring 42 is reset, the special-shaped boss 31 enters the first groove 413 from the second groove 414 again, and the button shell 41 is ejected out of the main body 10 along the fixing pin hole 412 under the action of the button fixing pin 43.

In a preferred embodiment, as shown in fig. 6 and 7, the fixing pin hole 412 is a long strip-shaped through hole, the length direction of the fixing pin hole 412 is parallel to the axial direction of the button housing 41, and the width of the fixing pin hole 412 is just matched with the cross-sectional diameter of the button fixing pin 43, so that the button housing 41 is more smooth in the pressing and resetting processes, the function of the button compression spring 42 is exerted to the maximum extent, and the mechanical loss is minimized. In addition, the size of the first groove 413 is matched with that of the special-shaped boss 31; the second groove 414 is an elongated groove disposed along the circumference of the button housing 41, the second groove 414 is communicated with the first groove 413, and the length of the second groove 414 is greater than that of the first groove 413. It can be understood that, in order to adapt to the displacement track of the shaped boss 31, the first groove 413 should be arranged at the upper part of the second groove 414, i.e. when the button pressure spring 42 is pressed, the shaped boss 31 slides from the first groove 413 to the second groove 414, and the shaped boss 31 can move downwards along the second groove 414.

As shown in fig. 1, in order to fix the movable handle 30 and simultaneously pull down or push up the movable handle 30, a cheek screw 13 may be further disposed on the main body 10, and a strip-shaped hole 32 is disposed at an end of the movable handle 30 connected to the main body 10, the movable handle 30 is cross-connected to the main body 10 through the strip-shaped hole 32 and the cheek screw 13, and a length direction of the strip-shaped hole 32 is matched with a direction in which the profile-shaped boss 31 moves downward along the second groove 414, so that when the movable handle 30 is pulled down, the movable handle 30 is simultaneously limited by the second groove 414 and the strip-shaped hole 32, and the operation is more stable.

As a modified example, a track groove may be further provided at one end of the movable handle 30 connected to the main body 10, as shown in fig. 8, the track groove is formed by connecting an arc track groove 33 and a straight track groove 34, and the straight track groove 34 is provided above the arc track groove 33; as shown in fig. 1, the main body 10 is provided with a stopper pin 14, and the movable handle 30 moves along the track groove through the stopper pin 14. In practical use, when the vertebral plate rongeur is in a working state, the limit pin 14 is positioned in the arc track groove 33, the movable handle 30 makes curvilinear motion along the arc track groove 33 through the limit pin 14, and at the moment, the sliding rod 20 can be pushed to move along the sliding rail 11 by pressing the movable handle 30; when the vertebral plate rongeur needs to be switched from the working state to the dismounting state, when the locking structure 40 is pressed and the handle 30 is pulled down, the limit pin 14 enters the linear track groove 34 from the arc track groove 33, namely, the movable handle 30 moves linearly along the linear track groove 34 through the limit pin 14 to realize the pull-down operation, and the movable handle 30 is separated from the sliding rod 20. It is understood that the straight track groove 34 is vertically upward above the circular-arc track groove 33 to facilitate the up-and-down movement of the movable handle 30.

As shown in fig. 1, 2, 4 and 8, a slide bar groove 21 is formed at the bottom of the slide bar 20, a protrusion 35 is formed at the connection position of the movable handle 30 and the slide bar 20, and the protrusion 35 is in end surface contact with the slide bar groove 21. When the vertebral plate rongeur is in a working state, the movable handle 30 cannot move up and down under the limiting action of the locking structure 40, and the movable handle 30 can push the sliding rod 20 to move along the sliding rail 11 through the rotating butting of the protrusion 35 and the sliding rod groove 21; when the vertebral plate rongeur needs to be switched from the working state to the dismounting state, when the locking structure 40 is pressed and the handle 30 is pulled down, the protrusion 35 is separated from the sliding rod groove 21, namely, the moving handle 30 is separated from the sliding rod 20.

In order to ensure that the sliding rod 20 can be opened at a certain angle without disassembling the sliding rail 11 and the main body 10 when separated, the vertebral plate rongeur of the embodiment of the invention is further provided with a guiding structure 50. As shown in fig. 1, fig. 2, fig. 3, fig. 9, fig. 10 and fig. 11, the guiding structure 50 includes a guiding shaft 51, a guiding pressure spring 52 and a guiding limiting block 53, wherein one end of the guiding shaft 51 is provided with a fixing block 511, the other end is a free end, and the guiding pressure spring 52 and the guiding limiting block 53 are sequentially sleeved on the guiding shaft 51. Meanwhile, a placing groove 15 is further arranged behind the sliding rail 11 at the top of the main body 10, a front end positioning hole 16 is arranged at the front end of the placing groove 15, and the front end positioning hole 16 is connected with the fixing block 511 through a first rotating pin 17; as shown in FIG. 4, the bottom of the slide rod 20 is provided with a middle positioning hole 22 above the placing groove 15, and the middle positioning hole 22 is connected with the guide stopper 53 through the second rotating pin 18.

When the vertebral plate rongeur is in a working state, the guide shaft 51 is arranged in the placing groove 15, two ends of the guide pressure spring 52 are in a pressed state under the action of the fixed block 511 and the guide limiting block 53, and the movable handle 30 can push the sliding rod 20 to move along the sliding rail 11; when the vertebral plate rongeur is in a disassembled state, the fixing block 511 of the guide shaft 51 is kept connected with the front end positioning hole 16, the guide pressure spring 52 is reset and pushes the guide limiting block 53 which is kept connected with the slide rod 20, the free end of the guide shaft 51 is separated from the placing groove 15 under the reset action of the guide pressure spring 52, the front end of the slide rod 20 is lifted, and the slide rod 20 is separated from the slide rail 11. That is, the distance between the middle positioning hole 22 and the front positioning hole 16 should be smaller than the length of the compressed guide spring 52 in the non-compressed state, so that the compressed guide spring 52 can be reset and push the guide limit block 53 when the vertebral plate rongeur is disassembled.

In addition, as shown in fig. 1, 2, 3, 9 and 12, the vertebral plate rongeur further comprises a tail limiting block 60, wherein the tail limiting block 60 comprises a head part 61, a neck part 62 and a sliding part 63 which are connected in sequence; the rear end of the bottom of the sliding rod 20 is provided with a limiting inner hole 23, and the head part 61 of the tail limiting block 60 is in interference fit with the limiting inner hole 23; the rear end at the top of main part 10 is equipped with terminal confined T type spacing groove 19, and the size of the neck 62 of afterbody stopper 60 and the open size looks adaptation of T type spacing groove 19, and the size of sliding part 63 is greater than the neck 62 size and can the joint in T type spacing groove 19 and slide along T type spacing groove 19. When the vertebral plate rongeur is disassembled, the front end of the sliding rod 20 is lifted, and the rear end of the sliding rod is limited by the tail limiting block 60, so that the sliding rod 20 is prevented from sliding out. In actual manufacturing, the tail limiting block 60 may be composed of a cylindrical structure, that is, the head 61 and the neck 62 are two cylinders with their central axes coinciding, the cross-sectional diameter of the head 61 is larger than that of the neck 62, and the sliding portion 63 is a cylindrical pin feature with its central axis perpendicular to that of the neck 62.

As a modified example, as shown in fig. 3, 4, 5, 9 and 13, an auxiliary boss 24 located at the front end of the limiting inner hole 23 can be further provided at the rear end of the bottom of the sliding rod 20, and a circular arc inclined plane 101 located at the front end of the T-shaped limiting groove 19 can be correspondingly provided at the rear end of the top of the main body 10, so that when the vertebral plate rongeur is disassembled, the auxiliary boss 24 can slide along the circular arc inclined plane 101 during the process of lifting the front end of the sliding rod 20 to assist in positioning the lifting angle of the sliding rod 20.

In the embodiment of the present invention, as shown in fig. 1 to 5, a first T-shaped boss 25 capable of moving along the slide rail 11 is disposed at the bottom of the slide bar 20, and a T-shaped groove 26 is disposed at the front end of the bottom of the slide bar 20; the front end of the top of the main body 10 is provided with a second T-shaped boss 102 located behind the cutting edge 12, and the second T-shaped boss 102 is matched with the T-shaped groove 26. The design can ensure that the slide rod 20 is connected with the main body 10 and can move back and forth along the slide rail 11 without deviation when the vertebral plate rongeur is in a working state.

When the vertebral plate rongeur of the embodiment of the utility model is actually used, the movable handle 30 is pulled back and forth (i.e. the user holds the main body 10 and the movable handle 30 at the same time and presses or looses the movable handle 30), the left upper side of the movable handle 30, namely the protrusion 35, is in end face contact with the groove 21 of the slide bar, the movable handle 30 rotates anticlockwise around the arc track groove 33 under the action of the limit pin 14, and meanwhile, the pressure of the guide pressure spring 52 in the guide structure 50 is overcome, the slide bar 20 is driven to move towards the front end along the slide rail 11, and the vertebral plate rongeur bites and cuts bones or; when the vertebral plate rongeur needs to be disassembled, the handle 30 is loosened, the button shell 41 of the locking structure 40 is pressed down, the handle 30 is pulled down to be separated from the groove 21 of the sliding rod, the sliding rod 20 loses the limit, the guide pressure spring 52 on the guide structure 50 pushes the guide limit block 53 open, and the sliding rod 20 is driven to slide backwards; in the process of moving the sliding rod 20 backwards, the auxiliary boss 24 at the rear end of the bottom of the sliding rod 20 is slightly lifted upwards through the arc inclined plane 101 at the rear end of the top of the main body 10, the guide shaft 51 rotates anticlockwise around the first rotating pin 17 and forms an included angle with the main body 10, and meanwhile, the guide limiting block 53 rotates anticlockwise around the second rotating pin 18, so that the sliding rod 20 and the main body 10 also form an included angle; the guiding pressure spring 52 continues to eject, the sliding rod 20 continues to retreat, the included angle is increased until the tail limiting block 60 slides to the tail end of the T-shaped limiting groove 19 closed at the rear end of the top of the main body 10 to be limited, the sliding rod 20 and the main body 10 form a fixed angle which is the final disassembly state of the vertebral plate rongeur, and therefore cleaning and disinfection can be achieved.

The utility model discloses vertebral plate rongeur can carry out thorough washing and disinfection to the gap between main part 10 and slide bar 20, avoids remaining of bone sediment and soft tissue, reduces cross infection's possibility, has solved vertebral plate rongeur and has washd difficulty, consuming time, easily lose the subassembly scheduling problem. The vertebral plate rongeur of the utility model has simple disassembly and assembly operation and strong practicability.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vertebral plate rongeur comprises a main body with a sliding rail, a sliding rod connected with the main body, and a movable handle, wherein a cutting edge is arranged at the front end of the main body, the movable handle is abutted against the sliding rod and can push the sliding rod to move along the sliding rail, and the vertebral plate rongeur is characterized by further comprising a locking structure which is arranged on the main body and used for switching the working state or the disassembly state of the vertebral plate rongeur;

the locking structure comprises a first state and a second state;

when the locking structure is in a first state, the movable handle is kept to be abutted against the sliding rod under the limiting action of the locking structure, the sliding rod can normally move along the sliding rail, and at the moment, the vertebral plate rongeur is in a working state;

when the locking structure is in a second state, the movable handle can move downwards, the front end of the sliding rod is lifted and separated from the movable handle, the sliding rod leaves the sliding rail, and at the moment, the vertebral plate rongeur is in a detachable state.

2. The laminar rongeur of claim 1, wherein the locking structure comprises a button housing, a button compression spring and a button fixing pin, the button housing is provided with a button inner hole for placing the button compression spring in an axial direction, the button housing is provided with a fixing pin hole, a first groove and a second groove in a circumferential direction, the fixing pin hole is independent of the first groove and the second groove, and the first groove and the second groove are adjacently arranged in the axial direction of the button housing; the button fixing pin is embedded in the main body and is positioned in the fixing pin hole;

the movable handle is provided with a special-shaped boss;

when the locking structure is in a first state, the button pressure spring is in a non-pressed state, the special-shaped boss is movably positioned in the first groove, and at the moment, the vertebral plate rongeur is in a working state;

when the locking structure is in a second state, the button pressure spring is in a pressed state, the special-shaped boss is located in the second groove, the movable handle can move downwards along the second groove, and at the moment, the vertebral plate rongeur is in a disassembled state.

3. The laminar rongeur of claim 2, wherein the fixation pin holes are elongated through holes, the length direction of the fixation pin holes is parallel to the axial direction of the button housing, and the width of the fixation pin holes is exactly matched with the cross-sectional diameter of the button fixation pins;

the size of the first groove is matched with that of the special-shaped boss;

4. The laminar rongeur of claim 3, wherein a cheek screw is provided on the body; a strip-shaped hole is formed in one end, connected with the main body, of the movable handle, and the movable handle is matched with the cheek part screw through the strip-shaped hole and is connected to the main body in a crossed mode;

the length direction of the strip-shaped hole is matched with the direction of the special-shaped boss moving downwards along the second groove.

5. The vertebral plate rongeur of claim 1, wherein the end of the movable handle connected with the main body is provided with a track groove, the track groove is formed by connecting an arc track groove and a straight track groove, and the straight track groove is arranged above the arc track groove; the main body is provided with a limiting pin, and the movable handle moves along the track groove through the limiting pin;

when the vertebral plate rongeur is in a working state, the limiting pin is positioned in the arc track groove, and at the moment, the movable handle can push the sliding rod to move along the sliding rail; when the vertebral plate rongeur is in a disassembled state, the limiting pin is positioned in the linear track groove, and at the moment, the movable handle can move downwards to be separated from the sliding rod.

6. The vertebral plate rongeur of claim 5, wherein the bottom of the sliding rod is provided with a sliding rod groove, the joint of the movable handle and the sliding rod is provided with a bulge, the bulge is in end surface contact with the sliding rod groove, and the movable handle pushes the sliding rod to move along the sliding rail through the rotating butt joint of the bulge and the sliding rod groove.

7. The vertebral plate rongeur of claim 1, further comprising a guide structure, wherein the guide structure comprises a guide shaft, a guide pressure spring and a guide limiting block, one end of the guide shaft is provided with a fixed block, the other end of the guide shaft is a free end, and the guide pressure spring and the guide limiting block are sequentially sleeved on the guide shaft;

the top of the main body is provided with a placing groove positioned behind the slide rail, the front end of the placing groove is provided with a front end positioning hole, and the front end positioning hole is connected with the fixed block through a first rotating pin;

the bottom of the sliding rod is provided with a middle positioning hole positioned above the placing groove, and the middle positioning hole is connected with the guide limiting block through a second rotating pin;

when the vertebral plate rongeur is in a working state, the guide shaft is arranged in the placement groove, and two ends of the guide pressure spring are in a pressed state under the action of the fixed block and the guide limiting block; when the vertebral plate rongeur is in a disassembly state, the guide pressure spring resets and pushes the guide limiting block, the free end of the guide shaft is separated from the placement groove under the reset action of the guide pressure spring, and the front end of the slide rod is lifted.

8. The laminar rongeur of claim 7, further comprising a caudal stop block comprising a head portion, a neck portion, and a glide portion connected in series;

the rear end of the bottom of the sliding rod is provided with a limiting inner hole, and the head of the tail limiting block is in interference fit with the limiting inner hole;

the rear end at main part top is equipped with terminal confined T type spacing groove, the size of the neck of afterbody stopper and the opening size looks adaptation in T type spacing groove, but the joint of sliding part is at T type spacing inslot and slide along T type spacing groove.

9. The vertebral plate rongeur of claim 8, wherein the back end of the bottom of the sliding rod is further provided with an auxiliary boss positioned at the front end of the limiting inner hole, the back end of the top of the main body is further provided with an arc inclined surface positioned at the front end of the T-shaped limiting groove, and the auxiliary boss can slide along the arc inclined surface in the process of lifting the front end of the sliding rod.

10. The vertebral plate rongeur of any one of claims 1 to 9, wherein the bottom of the slide bar is provided with a first T-shaped boss which can move along the slide rail, and the front end of the bottom of the slide bar is provided with a T-shaped groove; the front end at the top of the main body is provided with a second T-shaped boss positioned behind the cutting edge, and the second T-shaped boss is matched with the T-shaped groove.