Push rod puncher

Abstract

The utility model aims to provide a push rod puncher. The push rod puncher comprises a tubular handle, a push rod, a push needle, a spring and a trephine, wherein the push rod, the push needle and the spring are installed in the handle, and the trephine is installed at the end of the handle and communicated with a pipe opening of the handle. The push rod is connected with the push needle, a first abutting table top is arranged in the handle, the push rod is provided with a second abutting table top, and the two ends of the spring abut against the first abutting table top and the second abutting table top respectively so as to drive the push rod and the push needle to move close to or away from the trephine outlet in the direction close to the trephine outlet. The handle comprises a limiting face used for abutting against the top of the push rod so as to prevent the push rod from being removed from the interior of the handle. The push rod is manually pressed to drive the push needle to move into the trephine, so that substances blocked in the trephine are ejected out. And after ejection, the push rod drives the push needle to move out of the trephine under the elastic action of the spring, so that the problem that tissues in the trephine of the puncher are difficult to eject out is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to a push rod puncher. BACKGROUND

[0002] The puncher is a kind of annular resection manual surgical instrument, is widely used in biopsy, cosmetic field etc.This instrument is usually used in surgical operation, can accurately cut off tissue or pathological change site, and its annular design helps to reduce the trauma in the operation process, and promotes postoperative recovery.

[0003] The traditional puncher integrally injection moulds cylindrical trephine with handle, and the tissue clamped in the trephine needs to be inserted from the tail of handle by means of tool, and the tissue is ejected, and the operation is more troublesome. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of push rod puncher to solve the problem that tissue is not easy to eject in the trephine of puncher.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A kind of push rod puncher, including tubular handle, push rod installed in the handle, push needle, spring and trephine installed in the end of handle and communicated with its pipe orifice;The push rod is connected with the push needle, the handle is provided with abutting mesa one, the push rod is provided with abutting mesa two, the spring is respectively abutted with the abutting mesa one, abutting mesa two, to drive the push rod and the push needle in the direction close to the trephine outlet move close or away, the handle includes limiting surface for abutting with the push rod to prevent the push rod from moving out of handle interior.

[0007] As preferred, the handle side is provided with reset fixing hole and press fixing hole, the reset fixing hole and the press fixing hole are sequentially arranged along the direction that the push needle pushes to the trephine;The push rod includes clamping block for being clamped in the reset fixing hole or the press fixing hole.

[0008] As preferred, the length of press fixing hole in the direction of the push needle movement is longer than the length of reset fixing hole, and the push rod includes limiting block that moves in the press fixing hole.

[0009] As preferred, the push rod includes press head that protrudes outside the handle, connecting rod connected with the press head, intermediate rod connecting the connecting rod and the push needle, and lever connected with the intermediate rod, the lever and the connecting rod extend outward from the end connected with the intermediate rod in "V" shape, and the clamping block and the limiting block are arranged on the lever.

[0010] As preferred, the push rod is integrally injection molded with the push needle.

[0011] As preferred, the trephine comprises a ring-shaped clamping end clamped with the handle opening and penetrating therethrough, and a ring-shaped cutting edge connected with the ring-shaped clamping end and penetrating therethrough, the ring-shaped clamping end and the ring-shaped cutting edge are stepped. An automatic chip removal trephine comprises a handle, a head and a body, the two ends of the body are connected with the handle and the head respectively, the trephine further comprises a tissue guide hole penetrating through the head to the body, the body comprises a chip removal opening communicated with the tissue guide hole, the chip removal opening is a side opening slot with an opening outward.

[0012] As preferred, the handle cap is mounted on the top of the handle and penetrates the inner cavity of the handle, the push rod comprises a pressing end protruding from the handle cap and an abutting table connected with the pressing end, the abutting table is arranged in the inner cavity of the handle cap and abuts against the handle cap after the push needle is pressed and rebounded.

[0013] In summary, the embodiments of the utility model have the following beneficial effects:

[0014] 1. In order to facilitate the push out of the blocked object in the trephine, the push needle is arranged in the handle, the push rod is connected with the push needle, and the push rod is arranged at one end of the handle which is not installed with the trephine. The push rod is pressed manually to drive the push needle to move into the trephine, so that the blocked object in the trephine is pushed out. After being pushed out, the push rod drives the push needle to move out of the trephine under the elastic force of the spring.

[0015] 2. In order to facilitate the accurate fixing of the push needle at the corresponding position when the push needle is pressed or after being pressed back, the handle side is provided with a back fixing hole and a pressing fixing hole. When the push needle needs to push out the object in the trephine, the clamping block is first pressed into the inner cavity of the handle, and then the push rod is pressed away from the end of the trephine, so that the clamping block of the push rod moves into the pressing fixing hole. At this time, it is the position of the push needle in the state of pushing the object. Similarly, when the push needle finishes pushing the object and needs to be returned, the clamping block is pressed into the inner cavity of the handle again, and under the elastic force of the spring, the clamping block rebounds to the back fixing hole and abuts against the top of the back fixing hole.

[0016] 3. In order to limit the movement path of the push rod in the inner cavity of the handle, the length of the pressing fixing hole in the moving direction of the push needle is longer than the length of the back fixing hole, and the push rod comprises a limiting block which is limited to move in the pressing fixing hole. The limiting block always moves in the pressing fixing hole, thereby preventing the clamping block from being pressed into the inner part of the handle, that is, when the clamping block is separated from the back fixing hole or the pressing fixing hole, it cannot be positioned to the next hole which needs to be clamped.

[0017] 4. The push rod and the push needle are integrally injection molded, which increases the overall strength.

[0018] 5、ring drill contains annular clamping end and annular cutting edge, annular clamping end and annular cutting edge are stepped. Ring drill adopts stepped design, the size of annular clamping end is fixed, which can adapt to handle 1, the size of handle 1 does not need to change. Only the size of annular cutting edge needs to be changed, the demand of customizing any specification can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the push rod puncher of example 1;

[0020] Figure 2 is a schematic view of the push rod puncher of example 2; Figure 1 is a sectional view of the push rod puncher of example 1;

[0021] Figure 3 is a sectional view of the push rod puncher of example 2.

[0022] Figure 4 is a sectional view of the push rod puncher of example 2. Figure 3

[0023] In the drawings:

[0024] 1, handle; 11, abutting table one; 12, return fixing hole; 13, pressing fixing hole; 2, push rod; 21, abutting table two; 22, clamping block; 23, limiting block; 24, pressing head; 25, connecting rod; 26, middle rod; 27, lever; 28, pressing end; 29, abutting table; 3, push needle; 4, spring; 5, ring drill; 51, annular clamping end; 52, annular cutting edge; 6, handle cap. DETAILED DESCRIPTION

[0025] The utility model will be further described in detail below in combination with the drawings.

[0026] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Example one:

[0028] ​A push rod puncher comprises a tubular hollow handle 1, an end of the handle 1 is provided with a trephine 5 for extracting hair follicles or skin tissue. After the trephine 5 of the conventional puncher extracts the skin tissue or hair follicles, the skin tissue or hair follicles will be blocked in the trephine 5, at this time, a tool needs to be pushed into the other end of the handle 1 to push out the blocked objects in the trephine 5, which is troublesome and reduces the efficiency. In order to facilitate the pushing out of the blocked objects in the trephine 5, a push pin 3 is arranged in the handle 1, a push rod 2 is connected with the push pin 3, and the push rod 2 is arranged at the end of the handle 1 which is not provided with the trephine 5. By manually pressing the push rod 2, the push pin 3 is driven to move into the trephine 5, so as to push out the blocked objects in the trephine 5. After being pushed out, the push rod 2 drives the push pin 3 to move out of the trephine 5 under the elastic force of a spring 4. The push rod 2 abuts against the limiting surface of the handle 1, so as to avoid the push rod 2 and the push pin 3 from moving out of the handle 1.

[0029] In order to facilitate the accurate fixing of the push pin 3 at the corresponding position when the push rod is pressed or after being pressed back, the handle 1 is provided with a back fixing hole 12 and a pressing fixing hole 13 on the side surface, the back fixing hole 12 and the pressing fixing hole 13 are arranged in sequence along the direction in which the push pin 3 is pushed to the trephine 5. When the push pin 3 needs to push out the objects in the trephine 5, the clamping block 22 is first pressed into the inner cavity of the handle 1, after the clamping block 22 is separated from the back fixing hole 12, the end of the push rod 2 far away from the trephine 5 is pressed again, so that the clamping block 22 of the push rod 2 moves into the pressing fixing hole 13, at this time, it is the position of the push pin 3 when pushing objects. Similarly, when the push pin 3 finishes pushing objects and needs to be returned, the clamping block 22 is pressed into the inner cavity of the handle 1 again, under the elastic force of the spring 3, the clamping block 22 rebounds to the back fixing hole 12 and abuts against the top of the back fixing hole 12. At this time, the end surface of the back fixing hole 12 abutting against the clamping block 22 is the limiting surface of the handle 1 mentioned above.

[0030] In order to limit the movement path of the push rod 2 in the inner cavity of the handle 1, the length of the pressing fixing hole 13 in the movement direction of the push pin 3 is longer than the length of the back fixing hole 12, and the push rod 2 comprises a limiting block 23 which is limited to move in the pressing fixing hole 13. The limiting block 23 always moves in the pressing fixing hole 13, so as to prevent the clamping block 22 from being pressed into the inner cavity of the handle 1, i.e. from being unable to be positioned to the next hole which needs to be clamped when the clamping block 22 is separated from the back fixing hole 12 or the pressing fixing hole 13.

[0031] The push rod 2 comprises a pressing head 24 which extends outside the handle 1, a connecting rod 25 connected with the pressing head 24, an intermediate rod 26 connecting the connecting rod 25 and the push pin 3, and a lever 27 connected with the intermediate rod 26, the lever 27 and the connecting rod 25 extend outward in a "V" shape from the end connected with the intermediate rod 26, and the clamping block 22 and the limiting block 23 are arranged on the lever 27. A V-shaped gap is arranged between the connecting rod 25 and the lever 27, so that when the clamping block 22 is pressed into the inner cavity of the handle 1, the lever 27 is easy to be pushed, which saves labor.

[0032] The push rod 2 is integrally injection molded with the push needle 3, thereby increasing the overall strength.

[0033] The trephine 5 comprises a ring-shaped clamping end 51 clamped with the opening of the handle 1 and penetrating through, and a ring-shaped cutting edge 52 connected with the ring-shaped clamping end 51 and penetrating through, and the ring-shaped clamping end 51 and the ring-shaped cutting edge 52 are in a stepped shape. The trephine 5 adopts a stepped design, the size of the ring-shaped clamping end 51 is fixed, and the handle 1 can be matched, and the size of the handle 1 does not need to be changed. Only the size of the ring-shaped cutting edge 52 needs to be changed, and the demand of customizing any specification can be realized.

[0034] Embodiment two:

[0035] The difference from the embodiment 1 is that: a handle cap 6 is arranged on the top of the handle 1 and penetrates through the inner cavity of the handle 1, the push rod 2 comprises a pressing end 28 protruding from the handle cap 6 and an abutting table 29 connected with the pressing end 28, the abutting table 29 is arranged in the inner cavity of the handle cap 6 and abuts against the handle cap 6 after the push needle 3 is pressed and rebounded. In use, the push needle 3 is moved into the trephine 5 by pressing the pressing end 28 of the push rod 2, and the tissue in the trephine 5 is pushed out. After pushing out, the pressing end 28 is released, the push rod 2 moves to the end of the handle cap 6 under the elastic force of the spring 4, until the abutting table 29 abuts against the handle cap 6, and the push rod 2 is limited in the handle 1 after abutting.

[0036] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A push rod puncher characterized by, The handle (1) comprises a tubular handle (1), a push rod (2) installed in the handle (1), a push needle (3), a spring (4), and a trephine (5) installed at the end of the handle (1) and communicated with the tubular handle (1); the push rod (2) is connected with the push needle (3), the handle (1) is provided with an abutting table (11), the push rod (2) is provided with an abutting table (21), and the spring (4) is abutted with the abutting table (11) and the abutting table (21) at both ends, so as to drive the push rod (2) and the push needle (3) to move close to or away from the outlet of the trephine (5), and the handle (1) comprises a limiting surface for abutting with the push rod (2) to prevent the push rod (2) from moving out of the handle (1).

2. A push rod punch according to claim 1, wherein The side of the handle (1) is provided with a return fixing hole (12) and a pressing fixing hole (13), the return fixing hole (12) and the pressing fixing hole (13) are sequentially arranged along the direction in which the push needle (3) pushes the trephine (5), and the push rod (2) comprises a clamping block (22) for clamping in the return fixing hole (12) or the pressing fixing hole (13).

3. A push rod punch according to claim 2, wherein The length of the pressing fixing hole (13) in the moving direction of the push needle (3) is longer than the length of the return fixing hole (12), and the push rod (2) comprises a limiting block (23) for limiting movement in the pressing fixing hole (13).

4. A push rod punch according to claim 3, wherein The push rod (2) comprises a pressing head (24) extending out of the handle (1), a connecting rod (25) connected with the pressing head (24), an intermediate rod (26) connecting the connecting rod (25) and the push needle (3), and a push rod (27) connected with the intermediate rod (26), the push rod (27) and the connecting rod (25) extend outward in the shape of "V" from the end connected with the intermediate rod (26), and the clamping block (22) and the limiting block (23) are arranged on the push rod (27).

5. A push rod punch according to claim 1, wherein The push rod (2) and the push needle (3) are integrally injection molded.

6. A push rod punch according to claim 1, wherein The trephine (5) comprises a ring-shaped clamping end (51) clamped with the opening of the handle (1) and penetrating through, and a ring-shaped cutting edge (52) connected with the ring-shaped clamping end (51) and penetrating through, and the ring-shaped clamping end (51) and the ring-shaped cutting edge (52) are in the shape of steps.

7. A push rod punch according to claim 1 wherein, The handle (1) comprises a handle cap (6) installed on the top of the handle (1) and penetrating through the inner cavity of the handle (1), the push rod (2) comprises a pressing end (28) extending out of the handle cap (6) and an abutting table (29) connected with the pressing end (28), and the abutting table (29) is arranged in the inner cavity of the handle cap (6) and abuts with the handle cap (6) after the push needle (3) is pressed and rebounded.

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