Medical forceps

Abstract

The utility model discloses a pair of medical forceps, which belongs to the technical field of medical instruments and comprises two forceps bodies hinged with each other through a hinge shaft, each forceps body comprises a forceps head and a forceps handle, a reset spring is arranged between the forceps handles of the two forceps bodies, and a limiting mechanism capable of being unfolded and folded is arranged on the forceps handle of one forceps body. The unfolding and folding path of the limiting mechanism is located on the rotating path of the clamp handle of the other clamp body. When the limiting mechanism is unfolded, the minimum combination angle between the forceps handles of the two forceps bodies can be increased, and when the forceps handles of the two forceps bodies are clenched, a smaller maximum opening angle can be preset for the forceps heads of the two forceps bodies, so that the medical forceps are suitable for small-angle opening application scenes such as a rubber barrier clip; when the limiting mechanism is folded, the minimum combination angle between the forceps handles can be reduced, when the forceps handles are held tightly, a large maximum opening angle can be preset for the forceps heads, the medical forceps are suitable for large-angle opening scenes of medical forceps, for example, the medical forceps are used for forming a sheet clamp, and switching of opening scene requirements of different angles can be achieved through unfolding and folding of the limiting mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a pair of medical forceps. Background Art

[0002] In dental resin restorations, although the beak shape of some current pliers can be used with both forming sheet clamps and rubber dam clamps, because forming sheet clamps require a larger opening, while rubber dam clamps require a smaller opening, dentists generally need to prepare two pliers with different maximum opening angles. This is because the maximum opening angle of the pliers head suitable for rubber dam clamps is relatively small, making it more difficult to place forming sheet clamps. However, the maximum opening angle of the pliers head suitable for forming sheet clamps is relatively large, and excessive opening can easily cause the distance between the rubber dam clamp beaks to increase or even damage them. Therefore, there is an urgent need for medical pliers that can meet both application scenarios requiring a larger opening angle and those requiring a smaller opening angle. Utility Model Content

[0003] The purpose of the present utility model is to solve the above-mentioned technical problems and provide a medical forceps, in which a limiting mechanism that can be expanded and retracted is added to the handle of the forceps. By expanding and retracting the limiting mechanism, the minimum merging angle of the forceps handle can be adjusted, thereby adjusting the maximum opening angle of the forceps head, meeting the needs of large-angle opening application scenarios and small-angle opening application scenarios of medical forceps.

[0004] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention discloses a medical forceps, comprising two forceps bodies hinged to each other by a hinge axis, the forceps bodies comprising a forceps head and a forceps handle, a reset spring being provided between the forceps handles of the two forceps bodies, a limiting mechanism that can be extended and retracted being provided on the forceps handle of one of the forceps bodies, and the extension and retraction path of the limiting mechanism being located on the rotation path of the forceps handle of the other forceps body.

[0005] Preferably, the limiting mechanism includes a limiting fixed block and a limiting rotating block, the limiting fixed block is fixed on the clamp handle, the limiting fixed block is provided with an embedding groove, the limiting rotating block is provided with a rotating handle for inserting into the embedding groove, the rotating handle is rotatably connected to the limiting fixed block through a rotating shaft, the limiting fixed block is located on the rotation path of the limiting rotating block, the limiting fixed block and the limiting rotating block are located between the clamp handles of the two clamp bodies, and the axis of the rotating shaft is parallel to the axis of the hinge shaft.

[0006] Preferably, the clamp handle provided with the limiting mechanism is provided with a fixed magnet, the limiting rotating block is made of magnetic metal, and the fixed magnet is located on the rotating path of the limiting rotating block.

[0007] Preferably, a single hinged ear is provided between the pliers head and the pliers handle of one of the pliers bodies, and a double hinged ear is provided between the pliers head and the pliers handle of the other pliers body for inserting the single hinged ear, the hinged shaft passes through the ear plate holes of the single hinged ear and the double hinged ears, and both ends of the hinged shaft are provided with anti-slip rings with a diameter larger than the ear plate holes.

[0008] Preferably, it includes a detachable positioning snap ring for being mounted on the two caliper bodies, the detachable positioning snap ring has a movement margin between the caliper body and the axial direction of the hinge shaft, the detachable positioning snap ring is provided with a through opening and a through groove, the width of the through opening is smaller than the diameter of the anti-slip convex ring, the width of the through groove is larger than the diameter of the anti-slip convex ring, and the width of the bottom of the through groove is smaller than the diameter of the anti-slip convex ring.

[0009] Preferably, the pliers head is provided with a beak.

[0010] Preferably, a distal pressure block is further provided between the pliers head and the beak.

[0011] Preferably, the pliers handle includes a straight handle section and an outward-bent curved handle section, one end of the straight handle section is connected to the pliers head, and the other end of the straight handle section is connected to the curved handle section, and the limiting fixing block is arranged on the straight handle section.

[0012] Preferably, the straight handle section is provided with a spring embedding hole for embedding the end of the reset spring.

[0013] Preferably, the handle section is anti-slip treated.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] In the medical forceps of the present invention, the expansion of the limiting mechanism can increase the minimum merging angle between the handles of the two forceps bodies. When the handles of the two forceps bodies are gripped, a smaller maximum opening angle can be preset between the forceps heads of the two forceps bodies, thereby being suitable for small-angle opening application scenarios of medical forceps, such as rubber dam clamps; the retraction of the limiting mechanism can reduce the minimum merging angle between the handles of the two forceps bodies. When the handles of the two forceps bodies are gripped, a larger maximum opening angle can be preset between the forceps heads of the two forceps bodies, thereby being suitable for large-angle opening scenarios of medical forceps, such as forming sheet clamps. By expanding and retracting the limiting mechanism, switching between different medical forceps opening angle requirements can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the rear view of the medical forceps in the embodiment;

[0018] Figure 2 1 is a front structural schematic diagram of the medical forceps in the embodiment;

[0019] Figure 3 1 is a schematic side view of the medical forceps in the embodiment;

[0020] Figure 4 Schematic diagram of the rear perspective structure of the medical forceps in the embodiment;

[0021] Figure 5 1 is a front perspective structural diagram of the medical forceps in the embodiment;

[0022] Figure 6 It is a partial enlarged schematic diagram of the clamp head in the embodiment;

[0023] Figure 7 This is a partial enlarged view of the clamp handle in the embodiment being released (the limiting mechanism being deployed);

[0024] Figure 8 This is a partial enlarged view of the clamp handle in the embodiment when it is tightened (the limiting mechanism is deployed);

[0025] Figure 9 Schematic diagram of the three-dimensional structure of the clamp handle released (limiting mechanism deployed) in the embodiment;

[0026] Figure 10 Schematic diagram of the structure of the medical forceps gripping (limiting mechanism deployed) in the embodiment;

[0027] Figure 11 This is a partial enlarged view of the clamp handle in the embodiment being released (the limiting mechanism being retracted);

[0028] Figure 12 This is a partial enlarged view of the clamp handle in the embodiment when it is tightened (the limiting mechanism is retracted);

[0029] Figure 13 It is a schematic diagram of the three-dimensional structure of the clamp handle released (limiting mechanism retracted) in the embodiment;

[0030] Figure 14 Schematic diagram of the structure of the medical forceps in the embodiment when gripping (limiting mechanism retracted);

[0031] Figure 15 Schematic diagram of the structure of the medical forceps in the embodiment when viewed from above (the detachable positioning clamp is conventionally provided);

[0032] Figure 16 1 is a schematic structural diagram of the medical forceps in the embodiment when viewed from above (during the removal process of the detachable positioning clamp);

[0033] Figure 17 This is a structural diagram of the detachable positioning clip in the embodiment in a conventional sleeve state;

[0034] Figure 18 Schematic diagram of the detachable positioning snap ring in the embodiment moving away from the pliers handle through the groove side;

[0035] Figure 19 Schematic diagram of the structure of the detachable positioning clamp in the embodiment during the disassembly process;

[0036] Figure 20 This is a schematic structural diagram of the detachable positioning clamp before it passes over the hinge shaft in the embodiment;

[0037] Figure 21 This is a schematic diagram of the structure after the detachable positioning clamp ring in the embodiment passes over the hinge shaft;

[0038] Figure 22 This is the working state of the distal pressing block in the embodiment;

[0039] Figure 23 Schematic diagram of the structure of the hinged single ear in the embodiment;

[0040] Figure 24 Schematic diagram of the structure of the hinged ears in the embodiment.

[0041] Explanation of the accompanying symbols: 1. Pliers head; 2. Straight handle section; 3. Bent handle section; 4. Articulated shaft; 5. Return spring; 6. Position limiting fixed block; 7. Position limiting rotating block; 8. Rotating shaft; 9. Fixed magnet; 10. Beak; 11. Distal pressure block; 12. Removable positioning clamp; 13. Through port; 14. Through slot; 15. Anti-slip convex ring; 16. Articulated single ear; 17. Articulated double ears. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] This embodiment provides a medical forceps, such as Figures 1 to 24 As shown, the pliers include two bodies, which are hinged to each other through a hinge shaft 4. The pliers include a pliers head 1 and a pliers handle. A reset spring 5 is provided between the pliers handles of the two pliers to keep the pliers handles of the two pliers in an open state, that is, the pliers heads 1 of the two pliers remain in a closed state. A limiting mechanism is provided on the pliers handle of one of the pliers bodies, and the limiting mechanism can be expanded and retracted (expanded and retracted). The expansion and retraction path of the limiting mechanism is located on the inward rotation path of the pliers handle of the other pliers body to prevent the pliers handle without the limiting mechanism from continuing to rotate inward, thereby achieving the minimum combined angle control of the pliers handles of the two pliers bodies, and finally converting it to the control of the maximum expansion angle of the pliers head 1, that is, the maximum opening angle control of the pliers.

[0044] Working principle:

[0045] ① When it is necessary to apply it to a small-angle opening scenario, such as for a rubber dam clamp: just unfold the limit mechanism and increase the minimum merging angle between the clamp handles of the two clamp bodies. This can ensure that when the clamp handles of the two clamp bodies are tightly grasped, there is a preset smaller maximum opening angle between the clamp heads 1 of the two clamp bodies.

[0046] ② When it is necessary to apply it to a large-angle opening scenario, such as for forming sheet clamps: just retract the limiting mechanism and reduce the minimum merging angle between the clamp handles of the two clamp bodies by the limiting mechanism, so as to ensure that when the clamp handles of the two clamp bodies are tightly grasped, there is a preset smaller maximum opening angle between the clamp heads 1 of the two clamp bodies.

[0047] In one embodiment, if Figures 1 to 24 As shown, the position limiting mechanism includes a position limiting fixed block 6 and a position limiting rotating block 7. The position limiting fixed block 6 is fixed to the handle of one of the caliper bodies and is provided with an inserting groove. The position limiting rotating block 7 is provided with a rotating handle, which is inserted into the inserting groove and is rotatably connected to the position limiting fixed block 6 via a rotating shaft 8. The position limiting fixed block 6 is located in the rotation path of the position limiting rotating block 7. Both the position limiting fixed block 6 and the position limiting rotating block 7 are located between the caliper handles of the two caliper bodies. The axis of the rotating shaft 8 is parallel to the axis of the hinge shaft 4.

[0048] Working principle:

[0049] ① Rotate the limit rotating block 7 toward the direction of the clamp handle where the limit fixed block 6 is located until the limit rotating block 7 is in contact with the clamp handle, and the limit mechanism can be retracted. At this time, hold the clamp handles of the two clamp bodies tightly, and the clamp handle without the limit fixed block 6 will be in contact with the limit fixed block 6. The minimum merging angle between the clamp handles of the two clamp bodies reaches the minimum preset value, and the maximum opening angle between the clamp heads 1 of the two clamp bodies reaches the maximum preset value.

[0050] ② Rotate the limit rotating block 7 in the direction of the clamp handle away from the limit fixed block 6 until the limit rotating block 7 is in contact with the limit fixed block 6 and cannot be rotated further, so that the limit mechanism can be deployed. At this time, hold the clamp handles of the two clamp bodies tightly, and the clamp handle without the limit fixed block 6 will be in contact with the limit rotating block 7. The minimum merging angle between the clamp handles of the two clamp bodies reaches the maximum preset value, and the maximum opening angle between the clamp heads 1 of the two clamp bodies reaches the minimum preset value.

[0051] In addition, the limiting mechanism can also adopt other extension and retraction methods instead of the limiting fixed block 6 and the limiting rotating block 7, such as a telescopic rod with a fixed end disposed on the pliers handle and a movable end that can be extended or shortened to achieve extension and retraction. The telescopic rod can be designed to achieve positioning after extension and retraction by using friction, or it can be configured by providing one or more positioning holes along the axis of the outer rod, providing a slideway on the inner rod, and providing a positioning head within the slideway. The positioning head is retracted into or out of the slideway by a spring. When the positioning head is engaged with the positioning hole, positioning is achieved, and when the positioning head is pushed out of the positioning hole, the inner rod can be freely moved.

[0052] In one embodiment, if Figures 1 to 24 As shown, a fixed magnet 9 is provided on the clamp handle with a limiting mechanism, and the limiting rotating block 7 is made of magnetic metal. The fixed magnet 9 is located in the rotation path of the limiting rotating block 7. The fixed magnet 9 can attract the limiting rotating block 7, preventing it from rotating out and maintaining the retracted state of the limiting mechanism. Magnetic metals such as iron, cobalt, or nickel are also possible. Of course, positioning methods other than fixed magnet 9 and magnetic metal can also be used. For example, a snap-fit ​​method can be used, where a slot is provided on the clamp handle with the limiting mechanism, and a plug is provided on the limiting rotating block 7. The slot is located in the rotation path of the plug. When the plug rotates with the limiting rotating block 7, it can be inserted into the slot to achieve snap-fit ​​positioning. Another example is a Velcro method, where a Velcro loop or hook surface is provided on the clamp handle with the limiting mechanism, and a Velcro hook or hook surface is provided on the corresponding limiting rotating block 7. The hook and hook surfaces fit together to achieve adhesive positioning. Another example is a damping shaft 8, where the friction damping force is used to achieve angular positioning of the limiting fixed block 6 and the limiting rotating block 7.

[0053] In one embodiment, if Figures 1 to 24 As shown, the pliers handle consists of a straight section 2 and a curved section 3. One end of the straight section 2 is connected to the pliers head 1, while the other end is connected to the curved section 3. The curved section 3 is outwardly curved, meaning that the two sections of the pliers are bent in opposite directions. This facilitates hand force when gripping the pliers, ensuring a tight grip on the two handles. A stopper 6 is provided on the straight section 2.

[0054] In one embodiment, if Figures 1 to 24As shown, a spring embedding hole is provided on the straight handle section 2, and both ends of the reset spring 5 are respectively embedded in the spring embedding holes of the straight handle sections 2 of the two pliers bodies, providing elastic support for the two pliers bodies when they rotate to open and close.

[0055] In one embodiment, if Figures 1 to 24 As shown, the pliers heads 1 of the two pliers are both provided with a beak 10 for placing the formed sheet clip or extending between the rubber dam clip and the teeth.

[0056] In one embodiment, if Figures 1 to 24 As shown, a distal pressure block 11 is provided between the forceps head 1 and the beak portion 10, and pressure is applied to the rubber dam clamp in the distal direction via the distal pressure block 11. In clinical treatment of rubber dam clamp placement in the posterior molar region, due to the influence of the tooth axis and the maxillofacial curve, it is often necessary to apply pressure in the distal direction of the rubber dam clamp to obtain a more stable clamping effect, and this operation can be performed using the distal pressure block 11.

[0057] In one embodiment, if Figures 1 to 24 As shown, a single hinged ear 16 is provided between the pliers head 1 and the pliers handle of one pliers body, and a double hinged ear 17 is provided between the pliers head 1 and the pliers handle of the other pliers body. The single hinged ear 16 is inserted between the two ear plates of the double hinged ear 17. The ear plate hole of the single hinged ear 16 and the ear plate holes of the two ear plates of the double hinged ear 17 are inserted through the hinge shaft 4 to achieve hinge connection. At the same time, anti-slip convex rings 15 with a diameter larger than the ear plate holes are provided at both ends of the hinge shaft 4. The two anti-slip convex rings 15 can press the double hinged ear 17 and the single hinged ear 16 together, which can prevent the hinge shaft 4 from detaching from the single hinged ear 16 and the double hinged ear 17, and ensure the rotational stability of the two pliers bodies.

[0058] In one embodiment, if Figures 1 to 24As shown, the detachable positioning snap ring 12 is used to be mounted on the two pliers bodies. After the detachable positioning snap ring 12 is mounted on the pliers handles of the two pliers bodies, the opening angle of the medical pliers can be fixed in conjunction with the limiting mechanism. The detachable positioning snap ring 12 is provided with a through hole 13 and a through groove 14. The opening width of the through hole 13 is smaller than the diameter of the anti-slip convex ring, the notch width of the through groove 14 is larger than the diameter of the anti-slip convex ring, and the bottom width of the through groove 14 is smaller than the diameter of the anti-slip convex ring. The detachable positioning snap ring 12 has a movable margin between the pliers bodies and the pliers bodies in the axial direction of the hinge shaft 4 to facilitate the disassembly and assembly of the detachable positioning snap ring 12. After normal installation, the detachable positioning snap ring 12 will be installed on the clamp handles of the two clamp bodies. The side of the detachable positioning snap ring 12 where the groove 14 is located will fit with the clamp handle, and the through-hole 13 will be away from the clamp handle. The anti-slip convex ring of the hinge shaft 4 will correspond to the bottom of the groove 14. The through-hole 14 cannot pass through the anti-slip convex ring of the hinge shaft 4, and the through-hole 13 will not pass through the anti-slip convex ring at the other end of the hinge shaft 4 without applying force. At this time, the detachable positioning snap ring 12 cannot be separated from the clamp handle, which can prevent the detachable positioning snap ring 12 from falling off during daily use. When disassembly is required, the detachable positioning snap ring 12 needs to be moved along the axial direction of the articulated shaft 4 toward the through groove 14, so that the distance between the through hole 13 of the detachable positioning snap ring 12 and the pliers handle is reduced until it fits, and the distance between the through groove 14 and the pliers handle will gradually increase until it can pass over the anti-slip convex ring of the articulated shaft 4, and then the detachable positioning snap ring 12 is pushed or pulled outward toward the pliers head 1, so that the through groove 14 passes through the anti-slip convex ring at one end of the articulated shaft 4, and the through hole 13 passes through the anti-slip convex ring at the other end of the articulated shaft 4, the through hole 13 will be stretched by the force, and it can pass through the anti-slip convex ring, and finally the detachable positioning snap ring 12 can be removed.

[0059] In one embodiment, if Figures 1 to 24 As shown, the detachable positioning snap ring 12 is used to match the straight handle section 2 of the pliers handle, that is, the outer diameter of the detachable positioning snap ring 12 is smaller than the width of the bent handle section 3 of the two pliers handles, and it moves away from the straight handle section 2 toward the pliers head 1, and cannot be separated from the straight handle section 2 by the bent handle section 3.

[0060] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A medical forceps, comprising two pliers hinged to each other by a hinge axis, the pliers comprising a pliers head and a pliers handle, a return spring being provided between the pliers handles of the two pliers, characterized in that: A limit mechanism capable of being extended and retracted is provided on the handle of one of the pliers bodies, and an extension and retraction path of the limit mechanism is located on the rotation path of the handle of the other pliers body; The limiting mechanism includes a limiting fixed block and a limiting rotating block, the limiting fixed block is fixed on the clamp handle, the limiting fixed block is provided with an embedding groove, the limiting rotating block is provided with a rotating handle for inserting into the embedding groove, the rotating handle is rotatably connected to the limiting fixed block through a rotating shaft, the limiting fixed block is located on the rotation path of the limiting rotating block, the limiting fixed block and the limiting rotating block are located between the clamp handles of the two clamp bodies, and the axis of the rotating shaft is parallel to the axis of the hinge shaft; The clamp handle provided with the limiting mechanism is provided with a fixed magnet, the limiting rotating block is made of magnetic metal, and the fixed magnet is located on the rotating path of the limiting rotating block.

2. A medical forceps according to claim 1, characterized in that: A single hinged ear is provided between the pliers head and the pliers handle of one of the pliers bodies, and a double hinged ear is provided between the pliers head and the pliers handle of the other pliers body for the single hinged ear to be inserted into. The hinge shaft passes through the ear plate holes of the single hinged ear and the double hinged ears, and both ends of the hinge shaft are provided with anti-slip rings with a diameter larger than the ear plate holes.

3. A medical forceps according to claim 2, characterized in that: It includes a detachable positioning snap ring for being sleeved on the two caliper bodies, the detachable positioning snap ring has a movement margin between the caliper body and the axial direction of the hinge shaft, the detachable positioning snap ring is provided with a through opening and a through groove, the width of the through opening is smaller than the diameter of the anti-slip convex ring, the width of the through groove is larger than the diameter of the anti-slip convex ring, and the width of the bottom of the through groove is smaller than the diameter of the anti-slip convex ring.

4. The medical forceps according to claim 1, characterized in that: A beak is provided on the pliers head.

5. The medical forceps according to claim 4, characterized in that: A distal pressure block is also provided between the pliers head and the beak.

6. The medical forceps according to claim 1, characterized in that: The pliers handle includes a straight handle section and an outward-bent curved handle section, one end of the straight handle section is connected to the pliers head, and the other end of the straight handle section is connected to the curved handle section, and the limiting fixing block is arranged on the straight handle section.

7. The medical forceps according to claim 6, characterized in that: The straight handle section is provided with a spring embedding hole for embedding the end of the reset spring.

8. The medical forceps according to claim 6, characterized in that: The curved handle section is anti-slip treated.

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