CN210582572U

CN210582572U - Medical nucleus pulposus pincers

Info

Publication number: CN210582572U
Application number: CN201920637637.XU
Authority: CN
Inventors: 王福荣; 龚利芬; 戴丽芬
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-05-22
Anticipated expiration: 2029-05-07

Abstract

The utility model belongs to the technical field of nucleus pulposus pincers, in particular to medical nucleus pulposus pincers, which comprises a pincers knife mechanism, an installation shell, a return plate spring, a fixed hand lever, a swinging hand lever and a driving mechanism, wherein in the process that one end of the nucleus pulposus pincers with an upper nipper and a lower nipper extends into the inner side of the nucleus pulposus of a patient, a user does not need to apply external force to the nucleus pulposus pincers, thereby reducing the situations of hand soreness and the like in the use process of the user; in the process of clamping the nucleus pulposus pincers, if the nucleus pulposus clamping error is found or a specific nucleus pulposus is not determined, a user can firstly open the swing hand lever, so that the upper clamp plate can firstly swing upwards to loosen the nucleus pulposus clamping error, and then the upper clamp plate can move into the mounting shell, and the nucleus pulposus clamping error is prevented from being brought out to cause injury to a patient.

Description

Medical nucleus pulposus pincers

Technical Field

The utility model belongs to the technical field of nucleus pulposus pincers, especially, relate to a medical nucleus pulposus pincers.

Background

At present, nucleus pulposus pincers are frequently used in orthopedic operations such as nucleus pulposus extirpation and are mainly used as auxiliary instruments in the orthopedic operations for taking out rotten bones and trimming bone tissues. Traditional nucleus pulposus pincers have two nipper from top to bottom, open and shut the handle, connect the handle and constitute with the connection seal wire of nipper, under natural state, because the spring action, the handle is in the open mode, upper and lower nipper is in the open mode, but such nucleus pulposus pincers will have the one end of upper and lower nipper and stretch into patient's nucleus pulposus inboard and take out the in-process of necrotic nucleus pulposus, just need overcome the spring action hard and press from both sides the handle that opens and shuts tightly, will lead to situations such as the user appears the hand sour in the use like this, it is very uncomfortable to use, it is possible to all to increase unnecessary trouble and danger coefficient for medical staff and patient. The utility model relates to a medical nucleus pulposus pincers solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the prior art, the utility model discloses a medical nucleus pulposus clamp which is realized by adopting the following technical scheme.

A medical nucleus pulposus pincers is characterized in that: the clamp comprises a clamp knife mechanism, a mounting shell, a return plate spring, a fixed hand lever, a swinging hand lever and a driving mechanism, wherein the fixed hand lever is mounted at one end of the mounting shell, one end of the swinging hand lever is mounted on the fixed hand lever in a hinged mode through a fixed rotating shaft, and the return plate spring is mounted between the swinging hand lever and the fixed hand lever; the return plate spring plays a role in resetting the swing hand lever, and simultaneously ensures that the swing hand lever is opened at a maximum angle relative to the driving hand lever in a natural state; the other end of the mounting shell is provided with a clamp cutter mechanism, a driving mechanism is arranged in the mounting shell, and the driving mechanism is matched with the clamp cutter mechanism and the swing hand lever.

The tong cutter mechanism consists of a lower tong plate and an upper tong plate which are provided with sliding chutes; the lower nipper is arranged on the lower end surface in the mounting shell.

The driving mechanism comprises a reset plate spring, a driving rod, a sliding block, a guide support, a first swing rod, a second swing rod, a limiting plate, a mounting plate, a transmission gear, a toothed plate and a first rotating shaft, wherein one end of the second swing rod is fixedly mounted on the fixed rotating shaft hinged with the swing hand lever; one end of the first swing rod is arranged at the other end of the second swing rod in a hinged mode; in the swinging process of the swinging hand lever, the swinging hand lever can drive the second swing rod to swing through the fixed rotating shaft, the second swing rod drives the first swing rod to swing, the driving rod is installed in the installation shell through the guide support, and one end of the driving rod is connected with the other end of the first swing rod in a hinged mode; the first swing rod swings to drive the driving rod to slide along the guide direction of the guide support; one end of the mounting plate is mounted at the other end of the driving rod, a toothed plate is mounted at the other end of the mounting plate, the driving rod moves to drive the mounting plate to move, and the mounting plate moves to drive the toothed plate to move; a limit plate is arranged at one end of the toothed plate, which is far away from the mounting plate; under the natural state, the limiting plate is tightly contacted with the rear plate of the sliding block, and the driving spring arranged between the limiting plate and the sliding block is in a pre-compression state through the matching of the limiting plate and the rear plate of the sliding block; the sliding block consists of a bottom plate, two side plates arranged on the upper side of the bottom plate and a rear plate arranged on the upper side of the bottom plate, and a square guide opening is formed in the rear plate; the square guide port provides a guide channel for the toothed plate; the sliding block is arranged in a sliding groove on the lower nipper in a sliding fit manner; a limiting plate arranged on the toothed plate penetrates through a square guide opening formed in the sliding block and is positioned on the other side of the rear plate of the sliding block, and the limiting plate is tightly attached to the rear plate of the sliding block in an initial state; a driving spring is arranged between the mounting plate and the slider back plate, and the driving spring is in a pre-compression state in an initial state; two ends of the first rotating shaft are arranged in round holes formed in two side plates of the sliding block, the transmission gear is arranged on the first rotating shaft, and the transmission gear is matched with the toothed plate; when the toothed plate is meshed with the transmission gear, the toothed plate moves to drive the transmission gear to rotate; a gap is reserved between the toothed plate and the transmission gear in the initial state, namely the toothed plate is not in contact with the transmission gear in the initial state, and the toothed plate does not influence the transmission gear; one end of the upper nipper is provided with two symmetrical connecting lugs, and the upper nipper is arranged on the first rotating shaft through the two connecting lugs; a reset plate spring is arranged between the upper nipper and the sliding block bottom plate; the reset plate spring plays a reset role on the upper nipper, the upper nipper is positioned on the inner side of the mounting shell in an initial state, the upper nipper plays a limiting role on the upper nipper through the upper end surface in the mounting shell, the reset plate spring is in a compression state, when the upper nipper moves towards the outer side of the mounting shell under the driving of the sliding block and is matched with the lower nipper, the upper side surface of the upper nipper is arc-shaped, so that after the highest point of the upper nipper is separated from the outermost side of the upper end surface in the mounting shell, the contact position of the upper side surface of the upper nipper and the outermost side of the upper end surface in the mounting shell can move downwards along the arc surface of the upper end surface of the upper nipper under the action of the reset plate spring, namely, the upper nipper gradually swings upwards under the action of the reset plate spring, and finally, the upper nipper swings to the; in an initial state, the sliding block is positioned on one side of the sliding groove close to the swing hand lever; in the process that the driving rod just starts to push the mounting plate to move, the sliding resistance of the sliding block in the sliding groove is smaller and smaller than the pre-compression force of the driving spring, and the sliding resistance of the sliding block is smaller than the compression force of the driving spring which is continuously compressed, so that the mounting plate can directly drive the sliding block to slide through the driving spring in the process that the driving rod drives the mounting plate to move, and the sliding block can drive the upper nipper plate arranged on the mounting plate to move; when the sliding block is arranged on the trapezoidal guide block at the lower side of the sliding block in the moving process and the trapezoidal guide groove arranged on the lower nipper is contacted with one end, far away from the mounting shell, of the trapezoidal guide groove, the lower nipper limits the sliding block, the sliding block is in a static state, in the state, the mounting shell completely loses the limit on the upper nipper, and the upper nipper is opened to the maximum angle under the action of the reset plate spring; at the moment, the driving rod drives the mounting plate to move, so that the driving spring is extruded, the toothed plate mounted on the mounting plate moves relative to the sliding block, when the toothed plate is meshed with the transmission gear in the moving process, the transmission gear is driven to rotate by the movement of the toothed plate, the transmission gear drives the upper nipper to swing downwards through the first rotating shaft in a rotating mode, and meanwhile the spring is driven to exert an upward force; when the swing hand lever is loosened, the swing hand lever can reset under the action of the return plate spring, the swing hand lever can drive the driving rod to reset through the first swing rod and the second swing rod, the driving rod can reset to drive the mounting plate to reset at first, and because the toothed plate and the transmission gear are in a meshing state under the state, the driving spring is compressed, the lower nipper and the sliding block are in a relatively static state under the action of the driving spring, so that the toothed plate is reset by the resetting of the mounting plate, and the toothed plate can drive the transmission gear to rotate reversely by resetting; transmission gear antiport will drive the nipper and upwards swing, when last nipper swings to the maximum angle, the pinion rack breaks away from and limiting plate and slider backplate contact with transmission gear completely, drive spring resumes original precompression state, the actuating lever moves that resets this moment will directly stimulate the slider through the limiting plate and remove, remove the outermost side postnotum of up end in-process nipper and the installation shell at the slider, the installation shell will extrude the upper nipper and make the upper nipper swing downwards, the lower swing of upper nipper will compress the leaf spring that resets and make the leaf spring that resets resume to the original compressed state.

As a further improvement of the technology, the fixed handspike is provided with a fixed support lug, and the fixed support lug is provided with a fixed axle hole; the fixed rotating shaft is arranged on the fixed hand lever through the fixed shaft hole; the swing hand lever is fixedly arranged on the fixed rotating shaft; the space of the second swing rod in the fixed hand lever occupied in the swing process can be reduced through the fixed support lug, and the uppermost end of the fixed hand lever cannot protrude too much, so that the nucleus pulposus clamp looks more attractive.

As a further improvement of the technology, a trapezoidal guide groove is formed on the lower end surface of the sliding groove formed in the lower nipper, a trapezoidal guide block is installed on the lower side of the sliding block bottom plate, and the sliding block is installed on the lower nipper through the sliding fit of the trapezoidal guide block and the trapezoidal guide groove; the sliding block is guided and limited by the sliding fit of the trapezoidal guide block and the trapezoidal guide groove.

As a further improvement of the technology, the upper side of the front end surface of the sliding groove on the lower nipper is provided with a lead angle for preventing the upper nipper from interfering with the lower nipper in the process of swinging downwards.

As a further improvement of the technology, the rear end surface of the sliding groove formed in the lower nipper is provided with an avoiding opening for preventing the mounting plate and the driving spring from interfering with the lower nipper.

As a further improvement of the present technology, the drive spring is a compression spring.

As a further improvement of the present technology, the connecting lug of the upper nipper is connected to the first rotating shaft by welding.

As a further improvement of the technology, two ends of the reset plate spring are fixedly arranged on the upper nipper and the sliding block respectively in a welding mode.

As a further improvement of the technology, the transmission gear is fixedly arranged on the first rotating shaft in a welding mode.

As a further improvement of the present technology, a non-foldable compression coil spring is used as an alternative to the return plate spring.

Compared with the traditional nucleus pulposus pincers technology, the utility model relates to a nucleus pulposus pincers, when fixed handle bar and swing handle bar are in the closed state, upper nipper and lower nipper are in the clamping state, accord with people's use custom, simultaneously the utility model relates to a nucleus pulposus pincers is when stretching into patient's nucleus pulposus inboard the one end that will have upper nipper and lower nipper, and fixed handle bar and swing handle bar are in the open mode, and upper nipper and lower nipper are in the closed state, and the user need not exert external force to nucleus pulposus pincers in the process that will have the one end of upper nipper and lower nipper to stretch into patient's nucleus pulposus inboard, has reduced the situation such as the hand acid that the user appears in the use, the utility model discloses use comfortablely for traditional nucleus pulposus pincers, improved the efficiency that medical staff worked; and the utility model discloses a nucleus pulposus pincers, at the in-process that presss from both sides tightly to nucleus pulposus pincers, if the discovery presss from both sides wrong nucleus pulposus or when uncertain specific nucleus pulposus, the user can put open the swing arm before, make the swing arm reset through the effect of return leaf spring, the swing arm is at the in-process that resets, go up the nipper and will at first upwards swing, will press from both sides wrong nucleus pulposus and loosen, later go up the nipper and return back to contract relatively down, the while is swung down, move back in the installation shell at last, prevent to carry over out and lead to the fact the injury to the patient with pressing from both sides wrong nucleus pulposus.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

Fig. 3 is a schematic plan view of the overall component distribution.

FIG. 4 is a schematic view of the upper and lower vise plates in cooperation.

FIG. 5 is a schematic view of the upper and lower vise plates installed.

Figure 6 is a schematic view of the return leaf spring installation.

Fig. 7 is a schematic view of the fixed handle bar installation.

Fig. 8 is a schematic view of the second swing link installation.

FIG. 9 is a schematic view of a slider layout.

Fig. 10 is a schematic view of the return leaf spring installation.

FIG. 11 is a schematic view of the lower nipper structure.

Fig. 12 is a schematic view of a slider structure.

FIG. 13 is a schematic view of the upper nipper structure.

Number designation in the figures: 1. a pincer mechanism; 2. mounting a shell; 3. a return plate spring; 4. fixing the hand lever; 5. swinging the handle bar; 6. a drive mechanism; 7. a lower nipper plate; 8. an upper nipper plate; 9. a reset plate spring; 10. a drive spring; 11. a drive rod; 12. a slider; 13. fixing the support lug; 14. fixing the shaft hole; 15. a guide support; 16. a first swing link; 17. a second swing link; 18. a limiting plate; 19. fixing the rotating shaft; 20. mounting a plate; 21. a transmission gear; 22. a trapezoidal guide groove; 23. a trapezoidal guide block; 24. a toothed plate; 25. a first rotating shaft; 26. guiding an angle; 27. avoiding the mouth; 28. a chute; 29. a square guide port; 30. and connecting the support lug.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples or figures are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 and 2, the clamping device comprises a clamping knife mechanism 1, a mounting shell 2, a return plate spring 3, a fixed hand lever 4, a swinging hand lever 5 and a driving mechanism 6, wherein as shown in fig. 7, the fixed hand lever 4 is mounted at one end of the mounting shell 2, as shown in fig. 2 and 3, one end of the swinging hand lever 5 is mounted on the fixed hand lever 4 in a hinged manner through a fixed rotating shaft 19, and as shown in fig. 1, the return plate spring 3 is mounted between the swinging hand lever 5 and the fixed hand lever 4; the return plate spring 3 plays a role in returning the swing hand lever 5, and simultaneously ensures that the swing hand lever 5 is opened at a maximum angle relative to the driving hand lever in a natural state; the other end of the mounting shell 2 is provided with a tong-cutter mechanism 1, a driving mechanism 6 is arranged in the mounting shell 2, and the driving mechanism 6 is matched with the tong-cutter mechanism 1 and the swing hand lever 5.

As shown in fig. 4 and 11, the nipper mechanism 1 is composed of a lower nipper 7 and an upper nipper 8, which are provided with sliding grooves 28; the lower nipper 7 is mounted on the lower end surface inside the mounting case 2.

As shown in fig. 2, the driving mechanism 6 includes a return plate spring 9, a driving spring 10, a driving rod 11, a slider 12, a guide support 15, a first swing link 16, a second swing link 17, a limiting plate 18, a mounting plate 20, a transmission gear 21, a toothed plate 24, and a first rotating shaft 25, wherein as shown in fig. 8, one end of the second swing link 17 is fixedly mounted on a fixed rotating shaft 19 of the hinged swing hand lever 5; one end of the first swing link 16 is mounted at the other end of the second swing link 17 in a hinged manner; in the swinging process of the swinging hand lever 5, the swinging hand lever 5 can drive the second swing rod 17 to swing through the fixed rotating shaft 19, the second swing rod 17 drives the first swing rod 16 to swing, as shown in fig. 5 and 8, the driving rod 11 is installed in the installation shell 2 through the guide support 15, and one end of the driving rod 11 is connected with the other end of the first swing rod 16 in a hinged mode; the first swing rod 16 swings to drive the driving rod 11 to slide along the guide direction of the guide support 15; as shown in fig. 9, one end of the mounting plate 20 is mounted at the other end of the driving rod 11, a toothed plate 24 is mounted at the other end of the mounting plate 20, the driving rod 11 moves to drive the mounting plate 20 to move, and the mounting plate 20 moves to drive the toothed plate 24 to move; a limit plate 18 is arranged at one end of the toothed plate 24 far away from the mounting plate 20; in a natural state, the limit plate 18 is in close contact with the back plate of the slider 12, and the driving spring 10 installed between the mounting plate 20 and the slider 12 is in a pre-compression state through the matching of the limit plate 18 and the back plate of the slider 12; as shown in fig. 12, the sliding block 12 is composed of a bottom plate, two side plates installed on the upper side of the bottom plate, and a back plate installed on the upper side of the bottom plate and connected with the two side plates, and a square guide opening 29 is opened on the back plate of the sliding block 12; the square guide port 29 provides a guide channel for the toothed plate 24; as shown in fig. 10, the slider 12 is mounted in the slide groove 28 of the lower nipper 7 by a sliding fit; the limiting plate 18 arranged on the toothed plate 24 passes through a square guide opening 29 formed in the sliding block 12 and is positioned on the other side of the rear plate of the sliding block 12, and the limiting plate 18 is tightly attached to the rear plate of the sliding block 12 in an initial state; as shown in fig. 9, the driving spring 10 is installed between the mounting plate 20 and the rear plate of the slider 12, and the driving spring 10 is in a pre-compressed state in an initial state; two ends of the first rotating shaft 25 are installed in circular holes formed in two side plates of the sliding block 12, the transmission gear 21 is installed on the first rotating shaft 25, and the transmission gear 21 is matched with the toothed plate 24; when the toothed plate 24 is meshed with the transmission gear 21, the toothed plate 24 moves to drive the transmission gear 21 to rotate; a gap is formed between the toothed plate 24 and the transmission gear 21 in the initial state, that is, the toothed plate 24 is not in contact with the transmission gear 21 in the initial state, and the toothed plate 24 does not affect the transmission gear 21; as shown in fig. 13, one end of the upper nipper 8 has two symmetrical connecting lugs 30, and as shown in fig. 10, the upper nipper 8 is mounted on the first rotating shaft 25 through the two connecting lugs 30; as shown in fig. 4, a return plate spring 9 is arranged between the upper nipper 8 and the bottom plate of the sliding block 12; the reset plate spring 9 plays a reset role for the upper nipper 8, the upper nipper 8 is positioned at the inner side of the mounting shell 2 in an initial state, the upper end surface in the mounting shell 2 plays a role in limiting the upper nipper 8, the reset plate spring 9 is in a compressed state, when the upper nipper 8 moves towards the outer side of the mounting shell 2 under the driving of the sliding block 12 to be matched with the lower nipper 7, because the upper side surface of the upper nipper 8 is arc-shaped, therefore, when the highest point of the upper nipper 8 is separated from the outermost side of the upper end surface in the mounting shell 2, the contact position of the upper side surface of the upper nipper 8 and the outermost side of the inner upper end surface of the mounting shell 2 far away from the fixed hand lever 4 moves downwards along the arc surface of the upper end surface of the upper nipper 8 under the action of the reset plate spring 9, namely, the upper nipper 8 gradually swings upwards under the action of the reset plate spring 9, and finally, when the reset plate spring 9 returns to a natural state, the upper nipper 8 swings to a maximum angle relative to the lower nipper 7; in the initial state, the slide block 12 is positioned at one side of the slide groove 28 close to the swing handle bar 5; in the process of the present invention, when the driving rod 11 starts to push the mounting plate 20 to move, since the sliding resistance of the slider 12 in the sliding groove 28 is smaller than the pre-compression force of the driving spring 10, and the sliding resistance of the slider 12 is smaller than the compression force of the driving spring 10 that is continuously compressed, in the process of the driving rod 11 driving the mounting plate 20 to move, the mounting plate 20 can directly drive the slider 12 to slide through the driving spring 10, and the slider 12 slides to drive the upper nipper 8 mounted on the slider 12 to move; when the slide block 12 is in contact with one end, far away from the mounting shell 2, of the trapezoidal guide block 23 arranged on the lower side of the slide block 12 and the trapezoidal guide groove 22 formed in the lower nipper 7 in the moving process, the lower nipper 7 limits the slide block 12, the slide block 12 is in a static state, in this state, the mounting shell 2 completely loses the limit on the upper nipper 8, and the upper nipper 8 is opened at the maximum angle under the action of the reset plate spring 9; at this time, the driving rod 11 moves continuously to drive the mounting plate 20 to move, so that the driving spring 10 is extruded, the toothed plate 24 mounted on the mounting plate 20 moves relative to the slider 12, when the toothed plate 24 is engaged with the transmission gear 21 in the moving process, the transmission gear 21 is driven to rotate by the movement of the toothed plate 24, the transmission gear 21 rotates to drive the upper nipper 8 to swing downwards through the first rotating shaft 25, and meanwhile, the spring 10 is driven to exert an upward force; after the swing hand lever 5 is loosened, the swing hand lever 5 is reset under the action of the return plate spring 3, the swing hand lever 5 is reset and drives the driving rod 11 to reset through the first swing rod 16 and the second swing rod 17, the driving rod 11 is reset and drives the mounting plate 20 to reset at first, and because the toothed plate 24 and the transmission gear 21 are in a meshing state under the state, the driving spring 10 is compressed, the lower nipper 7 and the sliding block 12 are in a relatively static state under the action of the driving spring 10, the mounting plate 20 is reset at the moment and drives the toothed plate 24 to reset, and the toothed plate 24 is reset and drives the transmission gear 21 to rotate reversely; the transmission gear 21 rotates reversely to drive the upper nipper 8 to swing upwards, when the upper nipper 8 swings to the maximum angle, the toothed plate 24 is completely separated from the transmission gear 21, the limiting plate 18 contacts with the rear plate of the sliding block 12, the driving spring 10 returns to the original pre-compression state, the driving rod 11 resets and moves to directly pull the sliding block 12 to move through the limiting plate 18, after the upper end face of the upper nipper 8 and the mounting shell 2 is far away from the outermost side of the fixed hand lever 4 in the moving process of the sliding block 12, the mounting shell 2 presses the upper nipper 8 to enable the upper nipper 8 to swing downwards, and the lower swing of the upper nipper 8 compresses the reset plate spring 9 to enable the reset plate spring 9 to return to the initial compressed state.

In summary, the following steps:

the utility model discloses a beneficial effect: when the fixed hand lever 4 and the swing hand lever 5 are in the closed state, the upper nipper 8 and the lower nipper 7 are in the clamping state, which accords with the use habit of people, and simultaneously the utility model discloses a nucleus pulposus pincers stretch into the patient nucleus pulposus inboard at the end that will have the upper nipper 8 and the lower nipper 7, the fixed hand lever 4 and the swing hand lever 5 are in the open state, and the upper nipper 8 and the lower nipper 7 are in the closed state, the user need not exert external force on the nucleus pulposus pincers in the process that the end that will have the upper nipper 8 and the lower nipper 7 stretches into the patient nucleus pulposus inboard, the situations such as the hand acid that the user appears in the use process are reduced, the utility model discloses the use is more comfortable for traditional nucleus pulposus pincers, has improved the efficiency of medical staff's work; and the utility model discloses a nucleus pulposus pincers, at the in-process that presss from both sides tightly to nucleus pulposus pincers, if the discovery presss from both sides wrong nucleus pulposus or when uncertain specific nucleus pulposus, the user can put open swing handle bar 5 earlier, make swing handle bar 5 reset through the effect of return leaf spring 3, swing handle bar 5 is at the in-process that resets, go up nipper 8 will at first upwards swing, the nucleus pulposus that will press from both sides the mistake is loosened, later go up nipper 8 and return back to 7 relative lower nipper, the while is swung down, move back in the installation shell 2 at last, prevent to take out and cause the injury to the patient with the nucleus pulposus that presss from both sides the mistake.

As shown in fig. 6, the fixed handle bar 4 is provided with a fixed support lug 13, and the fixed support lug 13 is provided with a fixed axle hole 14; the fixed rotating shaft 19 is arranged on the fixed hand lever 4 through the fixed shaft hole 14; the swing hand lever 5 is fixedly arranged on the fixed rotating shaft 19; the space of the second swing rod 17 in the fixed hand rod 4 occupied in the swing process can be reduced through the fixed support lug 13, and the uppermost end of the fixed hand rod cannot protrude too much, so that the nucleus pulposus clamp looks more attractive.

A trapezoidal guide groove 22 is formed in the lower end face of a sliding groove 28 formed in the lower nipper 7, a trapezoidal guide block 23 is installed on the lower side of the bottom plate of the sliding block 12, and the sliding block 12 is installed on the lower nipper 7 through the sliding fit of the trapezoidal guide block 23 and the trapezoidal guide groove 22; the sliding block 12 is guided and limited by the sliding fit of the trapezoidal guide block 23 and the trapezoidal guide groove 22.

The upper side of the front end surface of the sliding groove 28 formed on the lower nipper 7 is provided with a lead angle 26 for preventing the upper nipper 8 from interfering with the lower nipper 7 in the process of swinging downwards.

The lower nipper 7 is provided with a relief opening 27 on the rear end surface of the slide groove 28 for preventing the mounting plate 20 and the drive spring 10 from interfering with the lower nipper 7.

The drive spring 10 is a compression spring.

The connecting lug 30 of the upper nipper 8 and the first rotating shaft 25 are connected by welding.

The two ends of the reset plate spring 9 are fixedly arranged on the upper nipper 8 and the sliding block 12 respectively in a welding mode.

The transmission gear 21 is fixedly mounted on the first rotating shaft 25 by welding.

As a further improvement of the present technology, a compressible coil spring that is not foldable is used as an alternative to the return plate spring 3.

The specific working process is as follows: when the nucleus pulposus pincers are used, firstly, one end with the upper nipper 8 and the lower nipper 7 extends into the inner side of the nucleus pulposus of a patient, then the damaged nucleus pulposus is found by observation, then the swinging handspike 5 is driven to swing relative to the fixed handspike 4, the swinging handspike 5 can drive the second swinging rod 17 to swing through the fixed rotating shaft 19, the second swinging rod 17 drives the first swinging rod 16 to swing, the first swinging rod 16 swings to drive the driving rod 11 to slide along the guiding direction of the guiding support 15, the driving rod 11 drives the mounting plate 20 to move, in the process that the driving rod 11 just starts to push the mounting plate 20 to move, the mounting plate 20 can directly drive the slider 12 to slide through the driving spring 10, and the slider 12 slides to drive the upper nipper 8 arranged on the slider; when the slide block 12 is in contact with one end, far away from the mounting shell 2, of the trapezoidal guide block 23 arranged on the lower side of the slide block 12 and the trapezoidal guide groove 22 formed in the lower nipper 7 in the moving process, the lower nipper 7 limits the slide block 12, the slide block 12 is in a static state, in this state, the mounting shell 2 completely loses the limit on the upper nipper 8, and the upper nipper 8 is opened at the maximum angle under the action of the reset plate spring 9; at the moment, the driving rod 11 drives the mounting plate 20 to move, and then the driving spring 10 is extruded, so that the toothed plate 24 mounted on the mounting plate 20 moves relative to the sliding block 12, when the toothed plate 24 is meshed with the transmission gear 21 in the moving process, the toothed plate 24 moves to drive the transmission gear 21 to rotate, the transmission gear 21 rotates to drive the upper nipper plate 8 to swing downwards through the first rotating shaft 25, the damaged nucleus pulposus is clamped, then the damaged nucleus pulposus is taken out through the nucleus pulposus clamp, and in the taking-out process, the upper nipper plate 8 and the lower nipper plate 7 are always in a clamping state; after the broken nucleus pulposus is taken out, after the swing hand lever 5 is loosened, the swing hand lever 5 can reset under the action of the return plate spring 3, the swing hand lever 5 resets and can drive the driving rod 11 to reset through the first swing rod 16 and the second swing rod 17, the driving rod 11 resets and can drive the mounting plate 20 to reset at first, because in the state, the toothed plate 24 and the transmission gear 21 are in the meshing state, the driving spring 10 is compressed, the lower nipper 7 and the sliding block 12 are in the relative static state under the action of the driving spring 10, the mounting plate 20 resets and drives the toothed plate 24 to reset at the moment, and the toothed plate 24 resets and can drive the transmission gear 21 to rotate reversely; when the upper nipper 8 swings to the maximum angle, the toothed plate 24 is completely separated from the transmission gear 21, the limiting plate 18 is in contact with the rear plate of the slider 12, the driving spring 10 returns to the original pre-compression state, the driving rod 11 resets and moves, the slider 12 is directly pulled to move through the limiting plate 18, the slider 12 moves to drive the upper nipper 8 to move, and meanwhile, in the moving process of the upper nipper 8, when the upper nipper 8 and the outermost rear side of the upper end surface in the mounting shell 2, which is far away from the fixed hand lever 4, the mounting shell 2 presses the upper nipper 8 to enable the upper nipper 8 to swing downwards, and the upper nipper 8 swings downwards to compress the reset plate spring 9 to enable the reset plate spring 9 to return to the initial compressed state; the utility model discloses in the in-process that presss from both sides tight to the nucleus pulposus, if when discovering press from both sides wrong nucleus pulposus or uncertain specific nucleus pulposus, the user can open swing handle bar 5 earlier for swing handle bar 5 resets through the effect of return leaf spring 3, swing handle bar 5 is at the in-process that resets, go up nipper 8 will at first upwards swing, the nucleus pulposus that will press from both sides the mistake loosens, later go up nipper 8 and return back to contract relatively lower nipper 7, the while is down swung, move back at last in the installation shell 2, prevent to take out and lead to the fact the injury to the patient with the nucleus pulposus that presss from both sides the mistake.

Claims

1. A medical nucleus pulposus pincers is characterized in that: the clamp comprises a clamp knife mechanism, a mounting shell, a return plate spring, a fixed hand lever, a swinging hand lever and a driving mechanism, wherein the fixed hand lever is mounted at one end of the mounting shell, one end of the swinging hand lever is mounted on the fixed hand lever in a hinged mode through a fixed rotating shaft, and the return plate spring is mounted between the swinging hand lever and the fixed hand lever; the other end of the mounting shell is provided with a tong cutter mechanism, the driving mechanism is arranged in the mounting shell, and the driving mechanism is matched with the tong cutter mechanism and the swing hand lever;

the tong cutter mechanism consists of a lower tong plate and an upper tong plate which are provided with sliding chutes; the lower nipper is arranged on the lower end surface in the mounting shell;

the driving mechanism comprises a reset plate spring, a driving rod, a sliding block, a guide support, a first swing rod, a second swing rod, a limiting plate, a mounting plate, a transmission gear, a toothed plate and a first rotating shaft, wherein one end of the second swing rod is fixedly mounted on the fixed rotating shaft hinged with the swing hand lever; one end of the first swing rod is arranged at the other end of the second swing rod in a hinged mode; the driving rod is installed in the installation shell through a guide support, and one end of the driving rod is connected with the other end of the first swing rod in a hinged mode; one end of the mounting plate is mounted at the other end of the driving rod, a toothed plate is mounted at the other end of the mounting plate, and a limiting plate is mounted at one end, far away from the mounting plate, of the toothed plate; the sliding block consists of a bottom plate, two side plates arranged on the upper side of the bottom plate and a rear plate arranged on the upper side of the bottom plate, and a square guide opening is formed in the rear plate; the sliding block is arranged in a sliding groove on the lower nipper in a sliding fit manner; a limiting plate arranged on the toothed plate penetrates through a square guide opening formed in the sliding block and is positioned on the other side of the rear plate of the sliding block, and the limiting plate is tightly attached to the rear plate of the sliding block in an initial state; a driving spring is arranged between the mounting plate and the slider back plate, and the driving spring is in a pre-compression state in an initial state; two ends of the first rotating shaft are arranged in round holes formed in two side plates of the sliding block, the transmission gear is arranged on the first rotating shaft, and the transmission gear is matched with the toothed plate; a gap is reserved between the toothed plate and the transmission gear in the initial state; one end of the upper nipper is provided with two symmetrical connecting lugs, and the upper nipper is arranged on the first rotating shaft through the two connecting lugs; a reset plate spring is arranged between the upper nipper and the sliding block bottom plate; in the initial state, the slide block is positioned on one side of the sliding groove close to the swing hand lever.

2. The medical nucleus pulposus clamp of claim 1, wherein: the fixed hand lever is provided with a fixed support lug, and the fixed support lug is provided with a fixed shaft hole; the fixed rotating shaft is arranged on the fixed hand lever through the fixed shaft hole; the swing hand lever is fixedly arranged on the fixed rotating shaft.

3. The medical nucleus pulposus clamp of claim 1, wherein: the lower end face of the sliding groove formed in the lower nipper is provided with a trapezoidal guide groove, the lower side of the sliding block bottom plate is provided with a trapezoidal guide block, and the sliding block is arranged on the lower nipper through the sliding fit of the trapezoidal guide block and the trapezoidal guide groove.

4. The medical nucleus pulposus clamp of claim 1, wherein: the upper side of the front end surface of the sliding groove on the lower nipper is provided with a lead angle for preventing the upper nipper from interfering with the lower nipper in the process of swinging downwards.