Blood vessel puncher

Abstract

The utility model relates to the field of medical instruments, in particular to a blood vessel hole puncher which comprises a shell tube, a hole puncher body and a hole puncher body. A sliding groove which extends in the axial direction and forms an acute angle with the axis of the shell pipe is formed in a pipe body of the shell pipe. The knob assembly is provided with a fixed seat and a rotary cap; the fixed seat is fixed at the rear end of the shell tube, and the rotating cap is rotatably arranged on the fixed seat; the spring is arranged in the outer shell pipe, and the two ends of the spring abut against the fixing base and the rear end of the inner cutter shaft rod respectively; the state that the cutter head of the inner cutter shaft head extends out of the outer cutter edge is maintained through the spring; the cylindrical handle is fixed to the inner cutter shaft rod and extends out of the sliding groove, the cylindrical handle is matched with the sliding groove, and when the cylindrical handle is pulled to press the rotary knob assembly, the shell pipe drives the outer cutter edge to move forwards and drives the outer cutter edge to rotate at the same time.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a blood vessel puncher. Background Art

[0002] A blood vessel puncher is a commonly used instrument in surgical operations, which is mainly used to make holes in blood vessels. Existing blood vessel punchers have complex structures and are not convenient or practical. Utility Model Content

[0003] In order to solve the problems in the prior art, the utility model provides a blood vessel puncher.

[0004] The technical solution provided by the utility model is:

[0005] A blood vessel puncher, comprising:

[0006] The outer shell tube has a front end and a rear end; the outer shell tube is provided with a slide groove extending in the axial direction and arranged at an acute angle with the axis of the outer shell tube;

[0007] An outer blade, fixed to the front end of the outer shell tube, having a through cavity;

[0008] An inner knife shaft rod is disposed in the outer shell tube and can slide back and forth in the outer shell tube;

[0009] An inner cutter shaft head is fixed to the front end of the inner cutter shaft rod through a pin shaft; the cutter head of the inner cutter shaft head can pass through the through cavity and extend out therefrom;

[0010] A knob assembly, the knob assembly comprising a fixed seat and a rotating cap; the fixed seat is fixed to the rear end of the outer shell tube, and the rotating cap is rotatably arranged on the fixed seat;

[0011] A spring is arranged in the outer shell tube, and the two ends of the spring are respectively in contact with the fixing seat and the rear end of the inner knife shaft rod; the spring is used to maintain the state in which the knife head of the inner knife shaft head extends out of the outer knife edge;

[0012] A cylindrical handle is fixed on the inner blade shaft and extends from the slide slot. The cylindrical handle cooperates with the slide slot. When the cylindrical handle is pulled to press the knob assembly, the outer shell tube drives the outer blade to move forward and rotate at the same time.

[0013] Preferably, when the inner tool shaft head is fixed to the inner tool shaft rod by a pin, the inner tool shaft head is allowed to swing.

[0014] Preferably, the inner knife shaft is provided with a mounting hole, and the columnar handle is fixed to the inner knife shaft by being inserted into the mounting hole.

[0015] Preferably, the rotating cap is rotatably arranged on the fixing seat via a bearing flange.

[0016] Beneficial effects of the utility model:

[0017] The rotating cap of the blood vessel puncher of the utility model can rotate relative to the fixing seat. When the thumb or palm presses the rotating cap to push the outer shell tube to rotate forward to cut the blood vessel wall during use, the thumb or palm will not be affected by the rotating force, and the use is smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic cross-sectional structure diagram of a blood vessel punch is shown;

[0019] Figure 2 A schematic diagram of the exploded structure of a blood vessel punch is shown;

[0020] Figure 3 A schematic diagram of the exploded structure of the inner cutter shaft rod and the inner cutter shaft head is shown;

[0021] Figure 4 A schematic diagram of the exploded structure of the knob assembly is shown;

[0022] Figure 5 A schematic diagram of the structure of the blood vessel punch in a first state is shown;

[0023] Figure 6 A schematic diagram of the structure of the blood vessel puncher in the second state is shown. DETAILED DESCRIPTION

[0024] The utility model will be further described below in conjunction with the accompanying drawings.

[0025] A blood vessel punch, such as Figures 1 to 6 As shown, including:

[0026] The outer shell tube 1 has a front end and a rear end. The outer shell tube 1 is provided with a slide groove 2 extending in the axial direction and arranged at an acute angle with the axis of the outer shell tube 1, and two slide grooves 2 are symmetrically arranged along the circumferential direction. The slide groove 2 is not arranged completely along the axis of the outer shell tube 1, but has a certain inclination angle, or the main direction of the slide groove 2 is arranged along the axis of the outer shell tube 1, and is expanded along the circumferential direction. The expansion angle or the acute angle formed by the slide groove 2 and the axis does not need to be too large, and it only needs to ensure that the inner knife shaft head 5 can rotate to cut the blood vessel wall.

[0027] The outer blade 3 is fixed to the front end of the outer shell tube 1. The front end of the outer blade 3 is a blade for cutting the blood vessel wall. The outer blade 3 is provided with a through cavity that passes through the front and back, and the through cavity positions the inner blade shaft head 5 and allows it to pass through and extend the blade head.

[0028] The inner knife shaft rod 4 is arranged in the outer shell tube 1 and can slide forward and backward in the outer shell tube 1. The main body of the inner knife shaft rod 4 is rod-shaped, and a receiving cavity is provided at the front end, and the receiving cavity is used to receive and fix the inner knife shaft head 5.

[0029] The inner cutter shaft head 5 is fixed in the storage cavity at the front end of the inner cutter shaft rod 4 by the pin 6. When the inner cutter shaft head 5 is fixed to the inner cutter shaft rod 4 by the pin 6, the inner cutter shaft head 5 is allowed to swing. The reason for this is that the position of the inner cutter shaft head 5 can be limited by the outer cutting edge 3, and the precision between the two is relatively high, while the inner cutter shaft rod 4 needs to move back and forth in the outer shell tube 1, so a certain margin of activity is required. For ease of installation, when the inner cutter shaft head 5 is fixed to the inner cutter shaft rod 4, a certain margin of activity is retained to facilitate the insertion of the inner cutter shaft head 5 into the through cavity of the outer cutting edge 3. The shapes of the outer cutting edge 3 and the inner cutter shaft head 5 are similar to those of the prior art, and do not belong to the invention of this patent, so they will not be described in detail.

[0030] The knob assembly 7 comprises a fixed seat 8 and a rotating cap 9, and a bearing flange 10 is arranged between the fixed seat 8 and the rotating cap 9; the fixed seat 8 is fixed to the rear end of the outer shell tube 1, and the bearing flange 10 is sleeved on the center column of the rotating cap 9. The rotating cap 9 is connected to the fixed seat 8 by a screw 11 on the other side of the fixed seat 8, so that the rotating cap 9 is rotatably arranged on the fixed seat 8.

[0031] The spring 12 is arranged in the outer shell tube 1, and the two ends of the spring 12 are respectively in contact with the fixing seat 8 and the rear end of the inner knife shaft rod 4. The spring 12 maintains the state that the cutter head of the inner knife shaft head 5 extends out of the outer knife edge 3.

[0032] The cylindrical handle 13 is fixed on the inner blade shaft 4 and extends out from the slide 2. The cylindrical handle 13 cooperates with the slide 2. When the cylindrical handle 13 is pulled to press the rotating cap 9 of the knob assembly, the outer shell tube 1 drives the outer blade 3 to move forward. Since the slide 2 has a certain activity angle in the circumferential direction while moving axially, the outer shell tube 1 drives the outer blade 3 to rotate, so that the inner blade shaft head 5 enters the outer blade 3. In the process, the outer shell tube 1 drives the outer blade 3 to rotate and cooperates with the inner blade shaft head 5 to complete the rotary cutting. At the same time, since the rotating cap 9 is rotatably arranged on the fixed seat 8, the pressing part of the rotating cap 9 will not rotate with the outer shell tube 1, and the overall action is smoother. After letting go, the outer shell tube 1 rebounds under the drive of the spring 12, and the inner blade shaft head 5 returns to the initial state of extending out of the outer blade 3. The inner blade shaft 4 is provided with a mounting hole 14, and the cylindrical handle 13 is fixed to the inner blade shaft 4 by inserting the mounting hole 14.

[0033] The present invention has been described in detail through preferred embodiments. However, through reading the foregoing, changes and additions to the various embodiments are also obvious to those skilled in the art. The applicant intends that all such changes and additions fall within the scope of protection of the claims of the present invention.

Claims

1. A blood vessel puncher, characterized in that: include: The outer shell tube has a front end and a rear end; the outer shell tube is provided with a slide groove extending in the axial direction and arranged at an acute angle with the axis of the outer shell tube; An outer blade, fixed to the front end of the outer shell tube, having a through cavity; An inner knife shaft rod is disposed in the outer shell tube and can slide back and forth in the outer shell tube; An inner cutter shaft head is fixed to the front end of the inner cutter shaft rod through a pin shaft; the cutter head of the inner cutter shaft head can pass through the through cavity and extend out therefrom; A knob assembly, the knob assembly comprising a fixed seat and a rotating cap; the fixed seat is fixed to the rear end of the outer shell tube, and the rotating cap is rotatably arranged on the fixed seat; A spring is arranged in the outer shell tube, and the two ends of the spring are respectively in contact with the fixing seat and the rear end of the inner knife shaft rod; the spring is used to maintain the state in which the knife head of the inner knife shaft head extends out of the outer knife edge; A cylindrical handle is fixed on the inner blade shaft and extends from the slide slot. The cylindrical handle cooperates with the slide slot. When the cylindrical handle is pulled to press the knob assembly, the outer shell tube drives the outer blade to move forward and rotate at the same time.

2. The blood vessel puncher according to claim 1, characterized in that: When the inner tool shaft head is fixed to the inner tool shaft rod through a pin shaft, the inner tool shaft head is allowed to swing.

3. The blood vessel puncher according to claim 1, characterized in that: The inner knife shaft is provided with a mounting hole, and the columnar handle is fixed to the inner knife shaft by being inserted into the mounting hole.

4. The blood vessel puncher according to claim 1, characterized in that: The rotating cap is rotatably arranged on the fixing seat via a bearing flange.

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