CN210472221U

CN210472221U - Vertebral lamina rongeur

Info

Publication number: CN210472221U
Application number: CN201920930273.4U
Authority: CN
Inventors: 郑加德; 宓光明; 孙志乾; 王正发
Original assignee: Shinva Surgical Instrument Co ltd
Current assignee: Shinva Surgical Instrument Co ltd
Priority date: 2019-06-19
Filing date: 2019-06-19
Publication date: 2020-05-08
Anticipated expiration: 2029-06-19

Abstract

The utility model belongs to the field of spinal surgery instruments, in particular to vertebral plate rongeur, which comprises a fixed plate and a sliding plate, wherein the head part of the sliding plate is provided with a guide platform which protrudes outwards from the lower surface of the sliding plate, the head part of the fixed plate is provided with a groove, a first sliding table is arranged in the groove along the length direction of the fixed plate, the first sliding table comprises a bar-shaped body and a first bar-shaped boss which is arranged at the middle part of the front side surface and the rear side surface of the bar-shaped body, a first sliding chute matched with the shape of the first sliding table is arranged on the guide platform corresponding to the first sliding table, and the first sliding; the tail end of the sliding sheet is provided with a second sliding table protruding out of the lower surface of the sliding sheet, the front side surface and the rear side surface of the second sliding table are provided with second strip-shaped bosses, the rear end of the fixed sheet is provided with a second sliding groove which is recessed inwards from the upper surface of the fixed sheet and is matched with the second sliding table in shape, and the second sliding table is assembled behind the second sliding groove and can move left and right along the second sliding groove. The sliding plate can slide smoothly through improvement, and the climbing or blocking phenomenon is prevented.

Description

Vertebral lamina rongeur

Technical Field

The utility model relates to a vertebral plate rongeur, which belongs to the field of spinal surgery instruments.

Background

The vertebral plate rongeur is mainly used for biting and cutting vertebral plates in spinal surgeries, is a common surgical instrument, and is used in cervical/lumbar spine surgeries, intervertebral disc surgeries, spinal interbody fusion and other surgical types. At present, the commonly adopted vertebral plate rongeur structure comprises a sliding sheet 2, a fixing sheet 1, a movable handle 3 and a fixed handle 6, wherein the head part and the tail part of the sliding sheet 2 are provided with T-shaped grooves, the head part and the tail part of the fixing sheet 1 are correspondingly provided with T-shaped platforms 19, the upper part of the movable handle 3 is provided with a U-shaped groove 18 and a hole groove, the U-shaped groove 18 and the hole groove are respectively matched with a pin shaft 5 on the sliding sheet 2 and a hole on the fixed handle 6, when in assembly, the protruding structures at the head part and the tail part of the fixing sheet 1 are respectively clamped in the clamping grooves at the head part and the tail part of the sliding sheet 2, the sliding sheet 2 is pushed by hands to enable the protruding structures of the fixing sheet 1 to completely enter the sliding groove of the sliding sheet 2, then the movable handle 3 is installed, the pin shaft 5 on the sliding sheet 2 is clamped in the U-shaped groove 18 on, cutting is now effected by closing the movable handle 3, the specific configuration being shown in figures 10-13. However, the vertebral plate rongeur has a plurality of defects in the actual assembly and use process:

1. the T-shaped groove at the head of the sliding sheet is matched with the T-shaped table at the head of the fixed sheet with high requirement, so that the gap between the T-shaped groove and the T-shaped table is properly controlled, otherwise, in the biting and cutting process of the T-shaped groove and the T-shaped table, the head of the sliding sheet is easily lifted up under the action of external force, commonly called as 'climbing', and normal assembly is influenced.

2. Because the tail part of the fixing plate is also provided with the T-shaped table, the requirements on the coaxiality and the planeness of the two T-shaped tables on the head part and the tail part of the fixing plate are higher, larger deviation is not allowed, otherwise the clamping of the vertebral plate rongeur in the use process is easily caused, and the normal use is influenced.

3. The movable handle has an upwards-lifted force when pushing the sliding sheet to move forwards, and the T-shaped table at the tail of the fixing sheet is small in contact area with the sliding sheet, so that the T-shaped table at the tail of the fixing sheet continuously rubs with the sliding sheet in the using process, the T-shaped table is seriously abraded, and after abrasion, the stress on the tail of the fixing sheet is uneven, and the clamping is also caused to affect normal use.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art, and provides the vertebral plate rongeur which can realize smooth sliding of the sliding plate and prevent the phenomenon of climbing or blocking.

The vertebral plate rongeur comprises a fixed plate and a sliding plate, wherein the head part of the sliding plate is provided with a guide platform protruding outwards from the lower surface of the sliding plate, the head part of the fixed plate is provided with a groove recessed inwards from the upper surface of the fixed plate, a first sliding table is arranged in the groove along the length direction of the sliding table, the first sliding table comprises a strip-shaped body and a first strip-shaped boss arranged in the middle of the front side surface and the rear side surface of the strip-shaped body along the length direction of the strip-shaped body, a first sliding chute matched with the shape of the first sliding table is arranged on the guide platform corresponding to the first sliding table, and the first sliding table can move; the tail end of the sliding sheet is provided with a second sliding table protruding out of the lower surface of the sliding sheet, the front side surface and the rear side surface of the second sliding table are provided with second strip-shaped bosses, the rear end of the fixed sheet is provided with a second sliding groove which is recessed inwards from the upper surface of the fixed sheet and is matched with the second sliding table in shape, and the second sliding table is assembled behind the second sliding groove and can move left and right along the second sliding groove.

In this vertebral plate rongeur, set up the direction platform of evagination in its lower surface at the slider head, and set up first spout in the direction platform is inside, when with stationary blade sliding fit, form "outsourcing" structure, wrap up the first slip table in the stationary blade head recess comprehensively, thereby can prevent that the slider head from lifting up when the cooperation is cut to two stings of slider and stationary blade, the climbing phenomenon no longer appears, simultaneously, sting at the two and cut the cooperation in-process, its afterbody can receive an ascending power when the slider gos forward, but because of the second bar boss of slider afterbody second slip table both sides can wrap up in the second spout of stationary blade afterbody, and slide forward along the second spout, consequently, can prevent effectively that the slider afterbody from lifting up, ensure the slider horizontal slip, thereby avoid the vertebra integrated circuit board stopper, prevent the card pause phenomenon.

Compared with the vertebral plate rongeur with the traditional structure, the utility model has the advantages that the structure is improved, the sliding sheet can slide smoothly on the fixing sheet, the climbing or the blocking phenomenon does not occur any more, and the smooth operation is ensured.

The utility model discloses in, second slip table and direction platform, the two evagination is the same in the height of slide lower surface, and head and tail end protrusion highly uniform on the slide promptly guarantee on same plane.

Preferably, in the first sliding table arranged in the groove at the head of the fixed sheet, the first strip-shaped bosses at the front side surface and the rear side surface of the strip-shaped body are symmetrically distributed in the front and the rear direction, so that the stress can be more uniform, the sliding sheet can slide along the central line of the sliding sheet, and the sliding sheet cannot deviate.

Preferably, the tail parts of the fixed piece and the sliding piece are respectively provided with a first mounting groove and a second mounting groove for mounting the movable handle, and the second sliding groove is positioned above the first mounting groove and is communicated with the first mounting groove up and down; a pin shaft is arranged at the tail of the sliding sheet, the pin shaft transversely penetrates through the second mounting groove, and the second mounting groove penetrates through a second sliding table at the tail end of the sliding sheet; the upper end of the movable handle is provided with a U-shaped groove, after the movable handle is arranged in the first mounting groove and the second mounting groove from bottom to top, the U-shaped groove is matched with a pin shaft at the tail part of the sliding sheet, and the pin shaft is clamped in the U-shaped groove; the movable handle is hinged with the fixing piece through an articulated shaft, the position of the articulated shaft is lower than the U-shaped groove, and the articulated shaft transversely penetrates through the first mounting groove. During assembly, the first sliding table slides into the first sliding groove, the second sliding table slides into the second sliding groove, the movable handle is installed, the pin shaft at the tail of the sliding sheet is located in the U-shaped groove at the upper end of the movable handle, the sliding sheet is connected with the movable handle through the pin shaft, the movable handle is connected with the fixing sheet through the hinged shaft, and the assembly of the whole vertebral plate rongeur is completed. When the movable handle is used, the movable handle is rotated to rotate around the fixing plate and the fixed handle (the fixing plate and the fixed handle of the vertebral plate rongeur sold in the market at present are integrally formed), and the pin shaft at the tail part of the sliding sheet is positioned in the U-shaped groove at the upper end of the movable handle, so that the sliding sheet can be driven to do linear motion on the fixing plate by rotating the movable handle, and the shearing is realized.

During assembly, the sliding sheet is connected with the movable handle through the pin shaft, and the movable handle is connected with the fixed sheet through the hinged shaft.

Further preferably, the second strip-shaped bosses on the front side surface and the rear side surface of the second sliding table are symmetrically distributed in the front and rear direction, so that the effect of enabling stress to be more uniform is achieved, the sliding sheet can slide along the central line of the sliding sheet, and deviation cannot occur.

Compared with the prior art, the utility model beneficial effect who has is:

1. in the vertebral plate rongeur, the head of the sliding sheet is provided with the guide table protruding out of the lower surface of the sliding sheet, the first sliding chute is arranged in the guide table, and the first sliding table in the groove at the head of the fixing sheet is completely covered when the sliding table is matched with the fixing sheet in a sliding way, so that the head of the sliding sheet can be prevented from being lifted when the sliding sheet is matched with the fixing sheet in an occlusion way, and the climbing phenomenon is avoided;

2. in the cooperation process of biting and cutting the slider and the fixed plate, the tail of the slider can be stressed by an upward force when the slider moves forward, but the second strip-shaped bosses on two sides of the second sliding table at the tail of the slider can be wrapped in the second sliding groove at the tail of the fixed plate and slide forward along the second sliding groove, so that the tail of the slider can be effectively prevented from being lifted, the horizontal sliding of the slider is ensured, the vertebral plate is prevented from being blocked, and the phenomenon of blocking is prevented.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the slider head configuration;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view showing the structure of the head of the anchor sheet;

FIG. 5 is a sectional view taken along line B-B of FIG. 4;

FIG. 6 is a schematic structural view of the tail of the movable plate;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 8 is a schematic view of the anchor tab tail;

FIG. 9 is a cross-sectional view taken along line D-D of FIG. 8;

FIG. 10 is a schematic structural view of a conventional vertebral plate rongeur;

FIG. 11 is a view showing an assembled structure of the movable handle and the slide and fixing pieces;

FIG. 12 is a cross-sectional view taken along line E-E of FIG. 10;

fig. 13 is a sectional view F-F in fig. 10.

In the figure: 1. a fixing sheet; 2. a slide sheet; 3. a movable handle; 4. hinging a shaft; 5. a pin shaft; 6. fixing a handle; 7. a reed; 8. fastening screws; 9. a guide table; 10. a first chute; 11. a groove; 12. a first sliding table; 13. a second sliding table; 14. a second mounting groove; 15. a second bar-shaped boss; 16. a second chute; 17. a first mounting groove; 18. a U-shaped groove; 19. a T-shaped table;

12.1, a strip-shaped body; 12.2, a first bar-shaped boss.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings:

as shown in figures 1-9, the vertebral plate rongeur of the present invention comprises a fixing plate 1, a sliding plate 2, a fixing handle 6 and a movable handle 3. The head of the sliding sheet 2 is provided with a guide platform 9 protruding out of the lower surface of the sliding sheet, the head of the fixed sheet 1 is provided with a groove 11 recessed inwards on the upper surface of the fixed sheet, a first sliding table 12 is arranged in the groove 11 along the length direction of the groove, the first sliding table 12 comprises a strip-shaped body 12.1 and a first strip-shaped boss 12.2 arranged in the middle of the front side surface and the rear side surface of the strip-shaped body 12.1 along the length direction of the strip-shaped body 12.1, a first sliding chute 10 matched with the shape of the first sliding table 12 is arranged on the guide platform 9 corresponding to the first sliding table 12, and the first sliding table 12 can move left and right along the; the tail end of the sliding sheet 2 is provided with a second sliding table 13 protruding out of the lower surface of the sliding sheet, the front side and the rear side of the second sliding table 13 are provided with second strip-shaped bosses 15, the rear end of the fixed sheet 1 is provided with a second sliding groove 16 recessed inwards into the upper surface of the fixed sheet and matched with the second sliding table 13 in shape, and the second sliding table 13 is assembled behind the second sliding groove 16 and can move left and right along the second sliding groove 16. The tail parts of the fixed piece 1 and the sliding piece 2 are respectively provided with a first mounting groove 17 and a second mounting groove 14 for mounting the movable handle 3, and a second sliding groove 16 is positioned above the first mounting groove 17 and is communicated with the first mounting groove 17 up and down; a pin shaft 5 is arranged at the tail part of the sliding sheet 2, the pin shaft 5 transversely penetrates through a second mounting groove 14, and the second mounting groove 14 penetrates through a second sliding table 13 at the tail end of the sliding sheet 2 (namely, the second sliding table 13 at the tail end of the sliding sheet 2 is divided into two sliding tables with L-shaped sections which are symmetrical front and back through the second mounting groove 14); the upper end of the movable handle 3 is provided with a U-shaped groove 18, after the movable handle 3 is arranged in the first mounting groove 17 and the second mounting groove 14 from bottom to top, the U-shaped groove 18 is matched with the pin shaft 5 at the tail part of the sliding sheet 2, and the pin shaft 5 is clamped in the U-shaped groove 18; the movable handle 3 is hinged with the fixed sheet 1 through a hinged shaft 4, the position of the hinged shaft 4 is lower than the U-shaped groove 18, and the hinged shaft 4 transversely penetrates through the first mounting groove 17. The fixing piece 1 and the fixing handle 6 are integrally formed; the lower parts of the movable handle 3 and the fixed handle 6 are fixed with reeds 7 through fastening screws 8.

During assembly, firstly, the first sliding table 12 slides into the first sliding groove 10, and simultaneously the second sliding table 13 slides into the second sliding groove 16, then the movable handle 3 is installed, the pin shaft 5 at the tail part of the sliding sheet 2 is positioned in the U-shaped groove 18 at the upper end of the movable handle 3, finally, the sliding sheet 2 is connected with the movable handle 3 through the pin shaft 5, the movable handle 3 is connected with the fixed sheet 1 through the articulated shaft 4, and the assembly of the whole vertebral plate rongeur is completed.

After the assembly, the length of the second sliding table 13 exposed outside is larger than the length of the occlusion opening formed by the front ends of the fixed plate 1 and the sliding plate 2, so that the occlusion effect of the fixed plate 1 and the sliding plate 2 in the use process can be ensured.

When the shearing machine is used, the movable handle 3 is rotated to rotate the movable handle 3 around the fixed plate 1 and the fixed handle 6, and the pin shaft 5 at the tail part of the sliding sheet 2 is positioned in the U-shaped groove 18 at the upper end of the movable handle 3, so that the movable handle 3 is rotated to drive the sliding sheet 2 to do linear motion on the fixed plate 1, and shearing is realized.

In the vertebral plate rongeur, the head of a sliding plate 2 is provided with a guide platform 9 protruding out of the lower surface of the sliding plate, a first sliding chute 10 is arranged inside the guide platform 9, when the sliding fit with the fixing sheet 1 is formed, an 'outer covering' structure is formed, the first sliding table 12 in the groove 11 at the head part of the fixing sheet 1 is completely covered, thereby preventing the head of the sliding sheet 2 from being lifted when the sliding sheet 2 and the fixed sheet 1 are in biting and cutting fit, avoiding the climbing phenomenon and simultaneously, during the snap-fit engagement, the trailing portion of the slider 2 is forced upwardly as it advances, however, because the second strip-shaped bosses 15 at two sides of the second sliding table 13 at the tail part of the sliding sheet 2 are wrapped in the second sliding groove 16 at the tail part of the fixed sheet 1 and slide forwards along the second sliding groove 16, therefore, the tail of the sliding sheet 2 can be effectively prevented from being lifted, and the sliding sheet 2 is ensured to horizontally slide, so that the vertebral plate is prevented from being blocked, and the phenomenon of blocking is prevented.

From the above, compare traditional structural style's vertebral plate rongeur, the utility model discloses a institutional advancement can make slide 2 smoothly slide on stationary blade 1, and climbing or stuck phenomenon no longer appear, ensure going on smoothly of operation.

In this embodiment:

the second sliding table 13 and the guide table 9 protrude outwards from the lower surface of the sliding sheet 2 at the same height, namely the protruding heights of the head part and the tail end of the sliding sheet 2 are consistent, and the two sliding tables are ensured to be on the same plane;

in the first slip table 12 that establishes in stationary blade 1 head recess 11, bar body 12.1 front and back both sides face first bar boss 12.2 is front and back symmetric distribution, and simultaneously, second bar boss 15 on the both sides face is front and back symmetric distribution around the second slip table 13, through the symmetric design can make the slider 2 atress more even when moving with stationary blade 1 cooperation to make slider 2 can slide along its central line, can not take place skew.

Claims

1. The utility model provides a vertebral plate rongeur, includes stationary blade (1) and slide (2), its characterized in that: the head of the sliding sheet (2) is provided with a guide table (9) protruding out of the lower surface of the sliding sheet, the head of the fixed sheet (1) is provided with a groove (11) recessed inwards into the upper surface of the fixed sheet, a first sliding table (12) is arranged in the groove (11) along the length direction of the groove, the first sliding table (12) comprises a strip-shaped body (12.1) and first strip-shaped bosses (12.2) arranged in the middle parts of the front side surface and the rear side surface of the strip-shaped body (12.1) along the length direction of the strip-shaped body (12.1), a first sliding chute (10) matched with the first sliding table (12) in shape is arranged on the guide table (9) corresponding to the first sliding table (12), and the first sliding table (12) can move left and right along the first sliding; the tail end of the sliding sheet (2) is provided with a second sliding table (13) protruding out of the lower surface of the sliding sheet, the front side surface and the rear side surface of the second sliding table (13) are provided with second strip-shaped bosses (15), the rear end of the fixing sheet (1) is provided with a second sliding groove (16) which is recessed in the upper surface of the fixing sheet and is matched with the second sliding table (13) in shape, and the second sliding table (13) is assembled behind the second sliding groove (16) and can move left and right along the second sliding groove (16).

2. The laminar rongeur of claim 1, wherein: the second sliding table (13) and the guide table (9) are protruded outwards from the lower surface of the sliding sheet (2) at the same height.

3. The laminar rongeur of claim 1, wherein: in the first sliding table (12), first strip-shaped bosses (12.2) are symmetrically distributed on the front side surface and the rear side surface of a strip-shaped body (12.1).

4. A laminar rongeur according to any one of claims 1 to 3, in which: the tail parts of the fixed piece (1) and the sliding piece (2) are respectively provided with a first mounting groove (17) and a second mounting groove (14) for mounting the movable handle (3), the second sliding groove (16) is positioned above the first mounting groove (17) and is vertically communicated with the first mounting groove (17), and the second mounting groove (14) penetrates through the second sliding table (13) at the tail end of the sliding piece (2); a pin shaft (5) is installed at the tail of the sliding sheet (2), and the pin shaft (5) transversely penetrates through the second installation groove (14); the upper end of the movable handle (3) is provided with a U-shaped groove (18), after the movable handle (3) is arranged in the first mounting groove (17) and the second mounting groove (14) from bottom to top, the U-shaped groove (18) is matched with a pin shaft (5) at the tail part of the sliding sheet (2), and the pin shaft (5) is clamped in the U-shaped groove (18); the movable handle (3) is hinged with the fixed sheet (1) through a hinged shaft (4), the position of the hinged shaft (4) is lower than the U-shaped groove (18), and the hinged shaft (4) transversely penetrates through the first mounting groove (17).

5. The laminar rongeur of claim 4, wherein: the second strip-shaped bosses (15) on the front side surface and the rear side surface of the second sliding table (13) are symmetrically distributed in the front and the rear direction.