Novel bent shear blade

Abstract

The utility model discloses a novel curved shear blade, which relates to the field of medical auxiliary instruments and comprises a fixed blade and a movable blade which are hinged in a cross shape, cutting edges are arranged at the ends, close to each other, of the fixed blade and the movable blade, and a shearing area is formed between the two cutting edges. The movable blade rotates on the face parallel to the cutting edge in the direction close to the fixed blade to form shearing, and meanwhile the movable blade moves close to the fixed blade on the face perpendicular to the cutting edge. By adjusting the distance between the fixed blade and the movable blade, when the bent scissors are opened and closed, the distance between the fixed blade and the movable blade is increased, the friction force between the fixed blade and the movable blade is reduced, the acting force needing to be applied is reduced, and the counter-acting force applied to fingers by the handle is relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical auxiliary instrument, especially a novel curved scissors blade. BACKGROUND

[0002] The curved scissors is a kind of medical instrument, with special curved design, is used for accurate cutting and tailoring in medical operation.The existing scissors blade is mostly composed of a fixed blade and a movable blade hinged, forms shearing force by the movable blade rotating towards the fixed blade direction, in actual application, if there is gap between fixed blade and movable blade, then lead to shearing force weakening, therefore generally make the blade curve, so that two cutting edges keep close contact in the shearing process, but such design leads to the friction between two blades being larger, need to exert larger force to handle, especially when opening the scissors, long time operation, the contact area of finger and handle is prone to oppression, affect the flexibility of finger, therefore, we propose a novel curved scissors blade. SUMMARY

[0003] The utility model is mainly to provide a novel curved scissors blade, can effectively solve the problem in the background art.

[0004] To achieve the above object, the utility model takes the technical scheme that:

[0005] A novel curved scissors blade, including the fixed blade and movable blade of cross hinged, the fixed blade and movable blade are close to each other one end and are provided with cutting edge, the shearing area is formed between two cutting edges, the movable blade rotates in the direction close to the fixed blade on the face parallel to cutting edge and forms shearing, simultaneously, movable blade also does the movement close to the fixed blade on the face perpendicular to cutting edge.

[0006] Preferably, one end of the movable blade is fixedly provided with a rotating shaft, the rotating shaft is movably penetrated through the fixed blade, and a push rod is rotatably connected to the circumferential surface of the rotating shaft; the end of the fixed blade close to the push rod is provided with an inclined surface block, the end of the inclined surface block close to the push rod is provided with an inclined surface, and the thickness of the inclined surface gradually increases in the rotating direction of the push rod, and the push rod is slidably connected with the inclined surface block.

[0007] Preferably, a plurality of guide rods are installed at the end of the fixed blade close to the push rod, the guide rods are movably penetrated through the mounting block, the mounting block is fixedly connected with the inclined surface block, and forms an annular structure together, and a spring is installed between the mounting block and the fixed blade.

[0008] Preferably, a protective cover is movably installed at the end of the rotating shaft away from the movable blade, and the protective cover is fixedly connected with the fixed blade.

[0009] Preferably, it also includes a clamp bar, the clamp bar being axially slidably connected to a pull rod; the end of the movable blade away from the blade head is integrally formed with a drive plate, the drive plate having a through groove, a crank rod being slidably connected in the groove, and the crank rod being fixedly connected to the pull rod.

[0010] Preferably, the fixed blade is fixedly connected to the clamp bar.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. During the closing operation, the distance between the fixed blade and the movable blade decreases to ensure that the shearing force meets the requirements; during the opening and closing operation, the distance between the fixed blade and the movable blade increases to reduce the force that needs to be applied.

[0013] 2. The driving force is the rotation of the movable blade toward the fixed blade, which reduces the distance between the fixed blade and the movable blade, resulting in a compact structure and strong practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the entire curved scissor blade proposed in this embodiment;

[0015] Figure 2 This is a schematic diagram of the entire curved scissor blade installation structure proposed in this embodiment;

[0016] Figure 3 for Figure 2 Schematic diagram of the structure of region A in the middle;

[0017] Figure 4 This is a schematic diagram of the adjustment mechanism in this embodiment;

[0018] Figure 5 for Figure 4 Schematic diagram of the structure of region B in the middle;

[0019] Figure 6 This is a schematic diagram of the spring mounting structure in this embodiment;

[0020] Figure 7 This is a schematic diagram of the movable blade in this embodiment.

[0021] In the diagram: 1. Fixed blade; 2. Movable blade; 3. Pull rod; 4. Drive plate; 5. Slide groove; 6. Crank rod; 7. Clamping rod; 21. Rotating shaft; 22. Lever; 23. Inclined block; 231. Mounting block; 232. Guide rod; 233. Spring; 234. Stop block. Detailed Implementation

[0022] In order to make the technical means, creation characteristics, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0023] In the description of the utility model, it needs to be explained that the directions or position relations indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like are the directions or position relations shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0025] As shown in Figures 1-7 A new type of bending shear blade, comprising a fixed blade 1 and a movable blade 2 which are cross-linked, the fixed blade 1 and the movable blade 2 are provided with cutting edges at one end close to each other, a shearing area is formed between the two cutting edges, the movable blade 2 rotates in the direction close to the fixed blade 1 on the plane parallel to the cutting edge to form shearing, at the same time, the movable blade 2 also moves close to the fixed blade 1 on the plane perpendicular to the cutting edge.

[0026] The distance between the fixed blade 1 and the movable blade 2 is variable, when the bending shear is in the open and closed state, the distance between the fixed blade 1 and the movable blade 2 is larger; when the movable blade 2 rotates in the direction close to the fixed blade 1, the distance between the fixed blade 1 and the movable blade 2 decreases, the friction between them increases, so that sufficient shearing force can be provided; when the movable blade 2 rotates in the direction away from the fixed blade 1, the distance between the fixed blade 1 and the movable blade 2 increases, the friction between them decreases.

[0027] Specifically, the movable blade 2 is fixedly installed with a rotating shaft 21, the rotating shaft 21 movably penetrates the fixed blade 1, and a push rod 22 is rotationally connected to the circumferential surface of the rotating shaft 21; the fixed blade 1 is provided with an inclined block 23 at the end close to the push rod 22, the end of the inclined block 23 close to the push rod 22 is provided with an inclined surface, the thickness of the inclined surface gradually increases along the rotating direction of the push rod 22, and the push rod 22 is slidingly connected to the inclined block 23. When the bending shears are in the open and closed state, the push rod 22 is located in the thinnest area of the inclined block 23, so that the distance between the movable blade 2 and the fixed blade 1 is increased, and when the movable blade 2 rotates towards the fixed blade 1, the push rod 22 moves towards the thicker area of the inclined block 23, so that the distance between the movable blade 2 and the fixed blade 1 is reduced. In the embodiment, the mounting block 231 is further provided with a stop block 234 for limiting the rotating angle of the push rod 22.

[0028] On the basis of the above scheme, when the push rod 22 is located in the thinnest area of the inclined block 23, the movable blade 2 and the fixed blade 1 are relatively loose, which may cause the two to separate and affect the shearing operation. Therefore, a plurality of guide rods 232 are installed at the end of the fixed blade 1 close to the push rod 22, the guide rods 232 movably penetrate the mounting block 231, the mounting block 231 is fixedly connected to the inclined block 23 and forms an annular structure together, and the spring 233 is installed between the mounting block 231 and the fixed blade 1; the end of the rotating shaft 21 away from the movable blade 2 is movably installed with a protective cover, and the protective cover is fixedly connected to the fixed blade 1. The inclined block 23 is always kept in the trend of moving towards the push rod 22 by the spring 233, so that the fixed blade 1 and the movable blade 2 are kept in the state of being attached.

[0029] In addition, in the embodiment, the rotation of the movable blade 2 is driven by the pull rod 3 in the prior art, and specifically, the pliers rod 7 is further provided, and the pull rod 3 is slidingly connected to the pliers rod 7 in the axial direction; the end of the movable blade 2 away from the blade head is integrally formed with a driving plate 4, the driving plate 4 is provided with a through sliding groove 5, the curved rod 6 is slidingly connected to the sliding groove 5, the curved rod 6 is fixedly connected to the pull rod 3, and the fixed blade 1 is fixedly connected to the pliers rod 7. The handle of the open and closed bending shears drives the pull rod 3 to move in the axial direction of the pliers rod 7, the pull rod 3 drives the curved rod 6 to move, the curved rod 6 slides in the sliding groove 5, and then the driving plate 4 rotates around the rotating shaft 21 as the center.

[0030] It should be noted that the pliers rod 7 and the pull rod 3 in the utility model are all known devices at present, and since they are not the focus of the technical scheme claimed in the application, they will not be described again.

[0031] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A new type of bending shear blade comprising a fixed blade (1) and a movable blade (2) which are cross-hinged, characterized in that: The fixed blade (1) and the movable blade (2) are provided with cutting edges at the end close to each other, and a shearing area is formed between the two cutting edges, the movable blade (2) rotates in the direction close to the fixed blade (1) on the plane parallel to the cutting edge to form shearing, and at the same time, the movable blade (2) also moves close to the fixed blade (1) on the plane perpendicular to the cutting edge.

2. A new type of bending shear blade according to claim 1, characterized in that: One end of the movable blade (2) is fixedly provided with a rotating shaft (21), the rotating shaft (21) movably penetrates the fixed blade (1), and the circumferential surface of the rotating shaft (21) is rotatably connected with a push rod (22); the end of the fixed blade (1) close to the push rod (22) is provided with a bevel block (23), one end of the bevel block (23) close to the push rod (22) is provided with a bevel, and the thickness of the bevel gradually increases in the rotating direction of the push rod (22), and the push rod (22) and the bevel block (23) are slidably connected.

3. A new type of bending shear blade according to claim 2, characterized in that: A plurality of guide rods (232) are installed at the end of the fixed blade (1) close to the push rod (22), the guide rods (232) movably penetrate the mounting block (231), the mounting block (231) is fixedly connected with the bevel block (23), and forms an annular structure together, and the spring (233) is installed between the mounting block (231) and the fixed blade (1).

4. A new type of bending shear blade according to claim 3, characterized in that: The end of the rotating shaft (21) away from the movable blade (2) is movably provided with a protective cover, and the protective cover is fixedly connected with the fixed blade (1).

5. A new type of bending shear blade according to claim 1, characterized in that: The pincer rod (7) is further provided with the pull rod (3) which is axially slidably connected with the pincer rod (7); the end of the movable blade (2) away from the blade head is integrally formed with the driving plate (4), the driving plate (4) is provided with a through sliding groove (5), the curved rod (6) is slidably connected in the sliding groove (5), and the curved rod (6) is fixedly connected with the pull rod (3).

6. A new type of bending shear blade according to claim 5, characterized in that: The fixed blade (1) is fixedly connected with the pincer rod (7).

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