A puncture needle with a puncture head that is not easy to fall off

Abstract

The utility model discloses a puncture needle with a puncture head that is not easy to fall off, belonging to the technical field of medical devices. The technical solution thereof includes a puncture rod, one end of the puncture rod is provided with a puncture head, and the other end is provided with a handle. The puncture head comprises a puncture part in a pointed cone shape and a connecting part connected to the puncture rod, the puncture part and the connecting part are integrally formed, a mounting groove is provided on one end surface of the puncture rod, a fixing component for fixing the connecting part in the mounting groove is provided in the puncture rod, a sealing sleeve for fixing the fixing component is provided on the outer walls of the puncture head and the puncture rod, and the sealing sleeve is threadedly connected to the outer walls of the puncture head and the puncture rod. The utility model has the effect of preventing the puncture head from falling off.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and more specifically relates to a puncture needle whose puncture head is not easy to fall off. Background Art

[0002] The trocar is the most basic tool in laparoscopic surgery. It can be divided into two types based on its performance: reusable and disposable. Currently, the most commonly used trocar in clinical practice is made of metal. The trocar usually includes a sleeve assembly as a channel for other surgical instruments to enter and a puncture needle running through the sleeve assembly.

[0003] The puncture needle in the puncture device used in the existing laparoscopic surgery is usually composed of a puncture head and a puncture rod. The puncture head and the puncture rod are mostly fixed by bonding, and the connection strength is low. The puncture head and the puncture rod are easy to fall off, which affects the effect and progress of the operation. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a puncture needle whose puncture head is not easy to fall off, which has the advantage that the puncture head is not easy to fall off.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A puncture needle with a puncture head that is not easy to fall off, comprising a puncture rod, wherein a puncture head is provided at one end of the puncture rod and a handle is provided at the other end, the puncture head comprises a puncture portion in a pointed cone shape and a connecting portion connected to the puncture rod, the puncture portion and the connecting portion are integrally formed, a mounting groove is provided on one end surface of the puncture rod, a fixing assembly for fixing the connecting portion in the mounting groove is provided in the puncture rod, a sealing sleeve for fixing the fixing assembly is provided on the outer walls of the puncture head and the puncture rod, and the sealing sleeve is threadedly connected to the outer walls of the puncture head and the puncture rod.

[0007] The advantage of this solution is at least that: when assembling the puncture needle, the connecting portion on the puncture head is inserted into the mounting groove provided on the puncture rod, the connecting portion is fixed in the mounting groove by the fixing assembly, and then the sealing sleeve is sleeved on the outer wall of the puncture rod and the puncture head, so that the assembly of the puncture needle is completed. By providing the fixing assembly and the sealing sleeve, the puncture needle avoids the phenomenon of the puncture head and the puncture rod falling off when being used as in the prior art.

[0008] The utility model is further configured as follows: the fixing assembly includes: a rectangular groove is opened on the side wall of the connecting portion, a chamber is opened inside the puncture rod and located on both sides of the installation groove, a rectangular hole connected to the side wall of the installation groove and a circular hole penetrating the outer wall of the puncture rod are respectively opened on the side walls of the chamber, and a locking head matching the rectangular groove is slidably installed in the chamber, the rectangular hole and the circular hole.

[0009] The utility model is further configured as follows: the locking head is composed of a locking block, a limiting plate and an extrusion block, which are integrally formed; the end of the extrusion block is configured as a semi-spherical shape; a return spring is installed between the side wall of the limiting plate and the side wall of the chamber; and the return spring is sleeved on the outer wall of the locking block.

[0010] The utility model is further configured as follows: an inclined surface is arranged on the locking block, and an inclined block matching the inclined surface is arranged in the rectangular groove of the connecting portion.

[0011] The utility model is further configured as follows: a sealing pad is provided on the inclined surface.

[0012] The utility model is further configured that two ends of the sealing sleeve are symmetrically provided with oblique edges with the same inclination as the conical surface of the puncture portion.

[0013] The utility model is further configured as follows: guide grooves are provided on two inner side walls of the installation groove away from the chamber, and guide blocks are provided on two outer side walls of the connection portion away from the rectangular groove.

[0014] The utility model is further configured as follows: the guide groove and the guide block are both provided with rounded corners.

[0015] In summary, the utility model has at least the following advantages:

[0016] 1. By means of the provided fixing assembly and the sealing sleeve, when assembling the puncture needle, the connecting portion on the puncture head is inserted into the mounting groove provided on the puncture rod, the connecting portion is fixed in the mounting groove by the fixing assembly, and then the sealing sleeve is sleeved on the outer wall of the puncture rod and the puncture head, thus completing the assembly of the puncture needle, so that the puncture needle avoids the phenomenon of the puncture head and the puncture rod falling off in the prior art when being used;

[0017] 2. By setting the extrusion block into a semi-spherical shape, the sealing sleeve is more smooth when it is put on the puncture rod and the puncture head. By setting a reset spring, when the puncture head is disassembled, cleaned and replaced, it is only necessary to remove the sealing sleeve. Under the action of the reset spring, the locking block will automatically move out of the rectangular groove on the connecting part, making it more convenient to disassemble the puncture head. The symmetrically arranged bevel edges at both ends of the sealing sleeve prevent the puncture needle from getting stuck when entering and removing the skin, thus avoiding secondary damage to the skin.

[0018] 3. By setting the inclined surface, the inclined block and the sealing gasket, when the connecting part is fixed, the connecting part can be more firmly fixed in the installation groove through the cooperation of the inclined surface, the inclined block and the sealing gasket, so as to prevent the puncture head from falling off the puncture rod. By setting the guide groove and the guide block, the connecting part on the puncture head can easily identify the direction of the rectangular groove, ensuring that it is installed in place at one time to improve the installation efficiency of the puncture head and the puncture rod. The rounded corners set on the guide groove and the guide block make the connecting part more smoothly installed in the installation groove to avoid the phenomenon of jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an overall schematic diagram of this embodiment;

[0020] Figure 2 This is an exploded schematic diagram of this embodiment;

[0021] Figure 3 It is a partial cross-sectional schematic diagram of the whole embodiment;

[0022] Figure 4 is a partial cross-sectional schematic diagram of the puncture rod in this embodiment;

[0023] Figure 5 is an overall schematic diagram of the locking head and the spring in this embodiment;

[0024] Figure 6 is an overall schematic diagram of the puncture head in this embodiment;

[0025] Figure 7 for Figure 6 A three-dimensional cross-sectional schematic diagram of

[0026] Figure 8 for Figure 7 Enlarged schematic diagram of part A.

[0027] Figure numerals: 1, puncture rod; 2, puncture head; 201, puncture part; 202, connecting part; 3, handle; 4, mounting groove; 5, fixing assembly; 501, rectangular groove; 502, chamber; 503, rectangular hole; 504, round hole; 505, locking head; 5051, locking block; 5052, limit plate; 5053, extrusion block; 6, sealing sleeve; 7, return spring; 8, inclined surface; 9, inclined block; 10, sealing gasket; 11, bevel; 12, guide groove; 13, guide block. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] A puncture needle whose puncture head is not easy to fall off, such as Figure 1 As shown, it comprises a puncture rod 1, a puncture head 2 is provided at one end of the puncture rod 1, and a handle 3 is provided at the other end.

[0030] like Figure 2 , Figure 3 As shown, in order to facilitate penetration of the skin and connection with the puncture rod 1, the puncture head 2 in this embodiment includes a puncture portion 201 in a pointed cone shape and a connecting portion 202 connected to the puncture rod 1. In order to increase the structural strength of the puncture head 2, the puncture portion 201 and the connecting portion 202 are integrally formed, a mounting groove 4 is provided on one end surface of the puncture rod 1, and a fixing component 5 for fixing the connecting portion 202 in the mounting groove 4 is provided in the puncture rod 1.

[0031] Furthermore, a sealing sleeve 6 for fixing the fixing assembly 5 is provided on the outer walls of the puncture head 2 and the puncture rod 1. The sealing sleeve 6 is threadedly connected to the outer walls of the puncture head 2 and the puncture rod 1. Bevels 11 with the same slope as the cone surface of the puncture portion 201 are symmetrically provided at both ends of the sealing sleeve 6. The bevels 11 can prevent the puncture needle from getting stuck when entering and removing the skin, thereby causing secondary damage to the skin.

[0032] like Figure 4-Figure 6 As shown, the fixing assembly 5 includes: a rectangular groove 501 is opened on the side wall of the connecting portion 202, a chamber 502 is opened inside the puncture rod 1 and on both sides of the mounting groove 4, and rectangular holes 503 connected to the side walls of the mounting groove 4 and a circular hole 504 penetrating the outer wall of the puncture rod 1 are respectively opened on the side walls of the chamber 502, and a locking head 505 cooperating with the rectangular groove 501 is slidably installed in the chamber 502, the rectangular hole 503 and the circular hole 504. Therefore, when the puncture head 2 and the puncture rod 1 are connected and fixed, the connection and fixation of the puncture rod 1 and the puncture head 2 are completed by installing the connecting portion 202 in the mounting groove 4 and inserting the locking head 505 into the rectangular groove 501, thereby preventing the puncture head 2 from falling off in the prior art.

[0033] It is worth mentioning that the locking head 505 is composed of a locking block 5051 , a limiting plate 5052 and an extrusion block 5053 , which are integrally formed.

[0034] like Figure 7 , Figure 8 As shown (refer to Figure 3 , Figure 4 , Figure 5 ), in order to facilitate the puncture head 2 to be disassembled, cleaned, replaced and installed more conveniently and quickly, a reset spring 7 is installed between the side wall of the limit plate 5052 and the side wall of the chamber 502, and the reset spring 7 is sleeved on the outer wall of the locking block 5051. Guide grooves 12 are opened on the two inner side walls of the installation groove 4 away from the chamber 502, and guide blocks 13 are opened on the two outer side walls of the connecting part 202 away from the rectangular groove 501. Both the guide grooves 12 and the guide blocks 13 are provided with rounded corners.

[0035] Furthermore, in order to prevent the sealing sleeve 6 from being stuck by the extrusion block 5053 during installation, the end of the extrusion block 5053 in this embodiment is configured to be semi-spherical.

[0036] It is worth mentioning that in order to better fix the connecting part 202 in the mounting groove 4 and prevent the puncture head 2 from falling off, a bevel 8 is provided on the locking block 5051, a sealing gasket 10 is provided on the bevel 8, and a bevel block 9 cooperating with the bevel 8 is provided in the rectangular groove 501 of the connecting part 202.

[0037] The working process and beneficial effects of the utility model are as follows:

[0038] When assembling the puncture needle, the connecting portion 202 on the puncture head 2 is inserted into the mounting groove 4 provided on the puncture rod 1 under the guidance of the guide groove 12 and the guide block 13, and the connecting portion 202 is fixed in the mounting groove 4 by the locking block 5051 on the locking head 505, and then the sealing sleeve 6 is sleeved on the outer wall of the puncture rod 1 and the puncture head 2 to fix the locking head 505, and the assembly of the puncture needle is completed; when the puncture head 2 needs to be disassembled, cleaned and replaced, the sealing sleeve 6 is unscrewed from the puncture rod 1 and the puncture head 2, and the locking block 5051 is moved out of the rectangular groove 501 on the connecting portion 202 under the action of the reset spring 7, and then the puncture head 2 and the puncture rod 1 are separated, and the disassembly of the puncture head 2 is completed.

[0039] In summary, by inserting the locking block 5051 on the locking head 505 into the rectangular groove 501 on the connecting portion 202 under the action of the sealing sleeve 6 and the extruding block 5053, and by providing the inclined block 9, the inclined surface 8 and the sealing pad 10, the puncture head 2 is better fixed on the puncture rod 1, and the phenomenon of the puncture head 2 and the puncture rod 1 falling off in the prior art is avoided during use.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present invention should be included in the protection scope of the present invention.

Claims

1. A puncture needle with a puncture head that is not easy to fall off, comprising a puncture rod (1), wherein a puncture head (2) is provided at one end of the puncture rod (1) and a handle (3) is provided at the other end, characterized in that: The puncture head (2) comprises a puncture portion (201) in a pointed cone shape and a connecting portion (202) connected to the puncture rod (1); the puncture portion (201) and the connecting portion (202) are integrally formed; a mounting groove (4) is provided on one end surface of the puncture rod (1); a fixing assembly (5) for fixing the connecting portion (202) in the mounting groove (4) is provided in the puncture rod (1); a sealing sleeve (6) for fixing the fixing assembly (5) is provided on the outer walls of the puncture head (2) and the puncture rod (1); the sealing sleeve (6) is threadedly connected to the outer walls of the puncture head (2) and the puncture rod (1).

2. A puncture needle with a puncture head that is not easy to fall off according to claim 1, characterized in that: The fixing assembly (5) comprises: a rectangular groove (501) is formed on the side wall of the connecting portion (202); a chamber (502) is formed inside the puncture rod (1) and located on both sides of the mounting groove (4); rectangular holes (503) communicating with the side walls of the mounting groove (4) and a circular hole (504) penetrating the outer wall of the puncture rod (1) are formed on the side walls of the chamber (502); and a locking head (505) cooperating with the rectangular groove (501) is slidably mounted in the chamber (502), the rectangular hole (503) and the circular hole (504).

3. A puncture needle with a puncture head that is not easy to fall off according to claim 2, characterized in that: The locking head (505) is composed of three integrally formed parts: a locking block (5051), a limiting plate (5052) and an extrusion block (5053); the end of the extrusion block (5053) is configured to be semi-spherical; a return spring (7) is installed between the side wall of the limiting plate (5052) and the side wall of the chamber (502); and the return spring (7) is sleeved on the outer wall of the locking block (5051).

4. A puncture needle with a puncture head that is not easy to fall off according to claim 3, characterized in that: An inclined surface (8) is provided on the locking block (5051), and an inclined block (9) cooperating with the inclined surface (8) is provided in the rectangular groove (501) of the connecting portion (202).

5. A puncture needle with a puncture head that is not easy to fall off according to claim 4, characterized in that: A sealing gasket (10) is provided on the inclined surface (8).

6. A puncture needle with a puncture head that is not easy to fall off according to claim 1, characterized in that: The two ends of the sealing sleeve (6) are symmetrically provided with oblique edges (11) having the same inclination as the conical surface of the puncture portion (201).

7. A puncture needle with a puncture head that is not easy to fall off according to claim 2, characterized in that: Guide grooves (12) are provided on two inner side walls of the installation groove (4) away from the chamber (502), and guide blocks (13) are provided on two outer side walls of the connection portion (202) away from the rectangular groove (501).

8. A puncture needle with a puncture head that is not easy to fall off according to claim 7, characterized in that: The guide groove (12) and the guide block (13) are both provided with rounded corners.

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