Ligamentum flavum biting forceps

Abstract

A movable plier handle and a fixed plier handle are hinged in the middle in the front-back direction, an inner sleeve and an outer sleeve are connected in an inner-outer sleeving mode, and an occlusal opening is formed in the front end of the inner sleeve and the front end of the outer sleeve, a guide connecting base is arranged on the upper portion of the fixed plier handle, and a guide installation hole in the front-back direction is formed in the guide connecting base. A guide driving groove is formed in the lower portion of the guide mounting hole of the guide connecting seat, the inner sleeve is sleeved with the guide mounting hole, a driving head arranged in the guide driving groove is arranged at the rear end of the inner sleeve, and a poke rod on the upper portion of the movable clamp handle extends into the guide driving groove to be in an abutting state with the rear end of the inner sleeve or the rear end of the driving head. A locking seat is arranged at the rear end of the outer sleeve, a spring connected to the inner sleeve in a sleeved mode is arranged between the locking seat and the driving head in an abutting mode, and the locking seat is connected with the guide connecting seat in a locking mode through a screw. The device is compact in structure, stable in connection, safe in use and long in service life.

Description

Technical Field

[0001] The utility model relates to a surgical biting and cutting forceps, in particular to a yellow ligament biting and cutting forceps. Background Art

[0002] In existing spinal and cone tube surgeries, when it is necessary to remove part of the yellow ligament, it is usually necessary to use a laminae clamp to extend into the spinal position for resection, such as the spinal endoscopic external cone plate clamp with patent number 202020141531.3, in which the upper sleeve and the lower sleeve are both semicircular tubes, and the two are connected to form a circular tube and a sliding connection is adopted. The rear end of the lower sleeve is fixed on the support block, and a moving block is fixed to the rear end of the upper sleeve. When the movable clamp handle swings back and forth, the moving block is driven to make the upper sleeve slide back and forth on the lower sleeve. A clamp protrudes from the bottom of the moving block, and a notch is opened on the top of the movable clamp handle and is plugged into the clamp to realize the movable connection between the moving block and the top of the movable clamp handle. The upper and lower sleeves are supported by a semicircular structure as a whole. The front end of the support structure is easily deformed as a cutout. Even if the support structure is supplemented with a slide rail and a slide groove, the overall structural stability is still poor when the length is long, which increases the difficulty and cost of production. The feed drive of the moving block is realized by the movable clamp handle notch driving chuck. The notch exerts a force on the driving chuck in the form of a forward and upward force. The upper sleeve is poorly connected to the moving block as a whole and the rear end of the upper sleeve is subjected to an upward force component, which can easily cause the upper sleeve to be deformed and lifted, and the guide rail to be damaged, thereby affecting the safety and quality of use. In addition, the spring support is compressed when the upper sleeve moves forward, and is controlled to return by the elastic force of the spring support when resetting. In the structure where the notch is connected to the driving chuck, the notch is easily stuck, and the upper sleeve cannot be reset, affecting safe operation and use. At the same time, after long-term use, the spring support has a large risk of failure, thereby affecting the stable reset of the upper sleeve. Summary of the invention

[0003] The utility model provides a yellow ligament biting and cutting forceps with compact structure, stable connection, safe use and long service life.

[0004] The technical scheme adopted by the utility model is: a yellow ligament biting and cutting pliers, including a movable pliers handle, a fixed pliers handle, an elastic support member and inner and outer sleeves, the movable pliers handle and the fixed pliers handle are hinged in the middle in the front-to-back direction, the inner and outer sleeves are connected inside and outside and form a biting notch at the front end, characterized in that: a guide connecting seat is arranged on the upper part of the fixed pliers handle, a guide mounting hole in the front-to-back direction is arranged in the guide connecting seat, a guide driving groove is arranged at the lower part of the guide mounting hole, the inner sleeve is sleeved in the guide mounting hole, a driving head placed in the guide driving groove is arranged at the rear end of the inner sleeve, a toggle rod at the upper part of the movable pliers handle extends into the guide driving groove and is in abutment with the rear end of the inner sleeve or the rear end of the driving head, a locking seat is arranged at the rear end of the outer sleeve, a spring set on the inner sleeve is tightly arranged between the locking seat and the driving head, and the locking seat is locked and connected to the guide connecting seat through a screw.

[0005] The inner sleeve includes an inner threading tube section and a guide tube section which are integrally connected front and back. The guide tube section is located at the rear of the inner sleeve and is connected to the driving head on the outer periphery. The guide tube section is seamlessly slidably guided to the guide mounting hole. The diameter of the guide tube section is larger than that of the inner threading tube section. The spring is threaded on the inner threading tube section, and the spring is pressed tightly between the front end of the guide tube section and the rear end of the locking seat.

[0006] A notch hole is provided on the outer periphery of the front end of the outer sleeve, and the front end portion of the inner sleeve corresponding to the notch hole is a cutting edge structure.

[0007] The locking seat is locked and connected to the guide connecting seat along the front-back direction via screws.

[0008] The cross section of the guide driving groove is square or trapezoidal, and the driving head corresponds to the cross section of the guide driving groove.

[0009] A sinking platform is arranged at the lower part of the front end of the guide connection seat, and a boss corresponding to the sinking platform is arranged at the lower part of the rear end of the locking seat. The screw passes through the boss and the sinking platform, and the screw passes through the guide connection seat to stagger the guide driving groove.

[0010] A supporting step is arranged at the lower part of the sinking platform at the front end of the guide connecting seat, and the supporting step supports the locking seat.

[0011] The guide drive groove is a groove body structure that is not opened in the front-to-back direction, or is a groove body structure that is opened in the front, or is a groove body structure that is opened in the rear.

[0012] The relative inner sides of the lower part of the fixed clamp handle and the lower part of the movable clamp handle are respectively connected to two sides of the elastic supporting member.

[0013] The beneficial effects of the above technical solution adopted by the utility model are:

[0014] 1. The inner and outer sleeves are connected, and the cut hole at the front end of the outer sleeve is matched with the cutting edge of the inner sleeve to form a bite cut. The inner and outer sleeves have stable guide supports. Under the operation requirements of a long insertion length, the overall structure has better stability and longer service life;

[0015] 2. When the movable clamp handle is closed, the upper toggle rod pushes the driving head of the inner sleeve forward in the guide driving groove of the guide mounting hole of the guide mounting seat, and the compression spring makes the inner sleeve move forward along the direction of the guide mounting hole. The overall drive is smooth, without the risk of jamming, and the guide structure is more stable;

[0016] 3. The inner sleeve is inserted into the guide connection seat of the fixed clamp handle, and the rear end of the inner sleeve is constrained in the guide installation hole. After being acted upon by the toggle rod, there is no hidden danger of deformation and lifting, which is beneficial to improving the safety quality of the overall operation and extending the service life;

[0017] 4. Spring force is used to ensure the rearward reset of the upper casing. Compared with the use of elastic support parts to push the movable clamp handle alone, and then the movable clamp handle notch drives the upper casing to move backward through the driving chuck, the elastic support parts are prone to failure after long-term use. This can stably ensure reset and increase service life;

[0018] 5. The locking seat and the guide mounting seat are matched with bosses and sinks, and the screws are staggered in the guide drive slot for locking, which is convenient for fast and firm assembly. The guide mounting seat is supported by a support step to support the locking seat, which further improves the support for the outer sleeve, thereby improving the support stability of the inner sleeve, which is conducive to avoiding the deformation of the inner and outer sleeves caused by the long-term push back force of the inner sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] In the figure: movable pliers handle 1, toggle rod 2, elastic support member 3, fixed pliers handle 4, guide connecting seat 5, guide connecting hole 6, guide drive groove 7, sinker 8, support step 9, inner sleeve 10, guide pipe section 11, inner threading pipe section 12, cutting edge 13, drive head 14, outer sleeve 15, cut hole 16, locking seat 17, boss 18, spring 19. DETAILED DESCRIPTION

[0021] The invention is further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1As shown: a yellow ligament biting and cutting forceps, including a movable clamp handle 1, a fixed clamp handle 4 and an inner sleeve 10, an outer sleeve 15, the movable clamp handle 1 and the fixed clamp handle 4 are hinged in the middle in the front-to-back direction, a guide connecting seat 5 is arranged on the upper part of the fixed clamp handle 4, a guide installation hole 6 in the front-to-back direction is arranged in the guide connecting seat 5, and a guide driving groove 7 in the front-to-back direction is arranged at the lower part of the guide installation hole 6; the guide pipe section 11 at the rear of the inner sleeve 10 is slidably sleeved in the guide installation hole 6 without gap, a driving head 14 is arranged on the outer periphery of the guide pipe section 11, and the driving head 14 is arranged in the guide driving groove 7 for guiding cooperation, and the dial on the upper part of the movable clamp handle 1 The movable rod 2 extends from bottom to top into the guide driving groove 7 and is in a state of abutting the driving head 14 from back to front. The diameter of the guide tube section 11 is larger than the inner threading tube section 12 at the front of the inner sleeve 10. The inner threading tube section 12 is externally slidably guided to penetrate the outer sleeve 15. A locking seat 17 is provided at the rear end of the outer sleeve 15. The locking seat 17 is screwed in the front and rear directions to penetrate the locking guide connecting seat 5. A spring 19 is tightly provided between the front end of the guide tube section 11 and the rear end of the locking seat 17. A notch hole 16 is provided on the outer periphery of the front end of the outer sleeve 15. The front end end of the inner sleeve 10 corresponding to the notch hole 16 is a cutting edge 13, and the cutting edge 13 cooperates with the notch hole 16 to form a bite cut.

[0023] In this embodiment, the screw is inserted into the guide connecting seat to stagger the guide driving slot. The guide driving slot can be designed as a slot body structure that is not opened in the front and rear directions, or a slot body structure that is opened in the front, or a slot body structure that is opened in the rear.

[0024] Based on this embodiment, a sinking platform 8 is arranged at the lower front end of the guide connecting seat 5, a boss 18 corresponding to the sinking platform is arranged at the lower rear end of the locking seat 17, and the screws penetrate the boss and the sinking platform.

[0025] Based on this embodiment, a supporting step 9 is provided at the lower part of the sinking platform 8 at the front end of the guide connecting seat 5 , and the supporting step 9 supports the locking seat 17 .

[0026] Based on this embodiment, the cross section of the guide driving groove 7 can be designed to be square or trapezoidal, and the driving head 14 corresponds to the cross section of the guide driving groove 7 for stable matching and guiding.

[0027] Based on the present embodiment, in order to better improve the overall performance, an elastic support member 3 is generally provided on the relatively inner side of the lower part of the fixed clamp handle 4 and the lower part of the movable clamp handle 1 .

Claims

1. A yellow ligament biting forceps, comprising a movable handle, a fixed handle, an elastic support member and inner and outer sleeves, wherein the movable handle and the fixed handle are hinged in the middle in the front-back direction, and the inner and outer sleeves are connected inwardly and outwardly to form a biting incision at the front end, characterized in that: A guide connecting seat is arranged on the upper part of the fixed pliers handle, and a guide mounting hole in the front-to-back direction is arranged in the guide connecting seat, and a guide driving groove is arranged at the lower part of the guide mounting hole. The inner sleeve is sleeved in the guide mounting hole, and a driving head placed in the guide driving groove is arranged at the rear end of the inner sleeve. The toggle rod on the upper part of the movable pliers handle extends into the guide driving groove and is in abutment with the rear end of the inner sleeve or the rear end of the driving head. A locking seat is arranged at the rear end of the outer sleeve, and a spring connected to the inner sleeve is tightly arranged between the locking seat and the driving head, and the locking seat is locked and connected to the guide connecting seat by a screw.

2. The yellow ligament biting forceps according to claim 1, characterized in that: The inner sleeve includes an inner threading tube section and a guide tube section which are integrally connected front and back. The guide tube section is located at the rear of the inner sleeve and is connected to the driving head on the outer periphery. The guide tube section is seamlessly slidably guided to the guide mounting hole. The diameter of the guide tube section is larger than that of the inner threading tube section. The spring is threaded on the inner threading tube section, and the spring is pressed tightly between the front end of the guide tube section and the rear end of the locking seat.

3. The yellow ligament biting forceps according to claim 1, characterized in that: A notch hole is provided on the outer periphery of the front end of the outer sleeve, and the front end portion of the inner sleeve corresponding to the notch hole is a cutting edge structure.

4. The yellow ligament biting forceps according to claim 1, characterized in that: The locking seat is locked and connected to the guide connecting seat along the front-back direction via screws.

5. The yellow ligament biting forceps according to claim 1, characterized in that: The cross section of the guide driving groove is square or trapezoidal, and the driving head corresponds to the cross section of the guide driving groove.

6. The yellow ligament biting forceps according to claim 1, characterized in that: A sinking platform is arranged at the lower part of the front end of the guide connection seat, a convex platform corresponding to the sinking platform is arranged at the lower part of the rear end of the locking seat, a screw passes through the convex platform and the sinking platform, and the screw passes through the guide connection seat to stagger the guide driving groove.

7. The yellow ligament biting forceps according to claim 6, characterized in that: A supporting step is arranged at the lower part of the sinking platform at the front end of the guide connecting seat, and the supporting step supports the locking seat.

8. The yellow ligament biting forceps according to claim 1 or 2, characterized in that: The guide drive groove is a groove body structure that is not opened in the front-to-back direction, or is a groove body structure that is opened in the front, or is a groove body structure that is opened in the rear.

9. The yellow ligament biting forceps according to claim 1 or 2, characterized in that: The relative inner sides of the lower part of the fixed clamp handle and the lower part of the movable clamp handle are respectively connected to two sides of the elastic supporting member.

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