Novel safety injection needle

Abstract

The utility model relates to the field of medical instruments, and particularly discloses a novel safety injection needle which comprises a needle seat with an injection needle tube and a protective cap, a groove for containing the injection needle tube is formed in the protective cap, and a connecting piece is connected between the protective cap and the needle seat. One end of the connecting piece is hinged or flexibly connected with the protective cap, the other end of the connecting piece is hinged or flexibly connected with the limiting plate, two locking positions exist between the protective cap and the needle seat, a transition piece is connected between the connecting piece and the limiting plate, the transition piece and the connecting piece are in thick-wall connection, and the transition piece and the limiting plate are in thin-wall connection. And when in the second locking position, the protective cap is turned over, and the thin-wall joint between the transition piece and the limiting plate is pulled apart. Through the arrangement of the transition piece and the like, the effectiveness and the accuracy of the overturning action of the protective cap can be effectively guaranteed, and the use safety of the protective cap is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and particularly discloses a novel safety injection needle. Background Art

[0002] Conventional injection needles are usually equipped with a protective cover on the outer tube of the needle to prevent the needle from pricking medical staff. However, since the protective cover will be pulled out during puncture, needle pricking may still occur after the puncture, and may even cause cross infection. To solve the above problems, a safety injection needle has appeared on the market. A protective cap (or shell) is hinged or softly connected to one side of the injection needle seat. The top of the protective cap is provided with a groove for accommodating the needle seat and the needle tube. The side of the protective cap is provided with an opening for the needle seat and the needle tube to be placed in the groove. The groove is provided with a locking piece (or card) to prevent the needle tube from falling out of the groove. It can effectively prevent needle pricking injuries, such as the anti-puncture safety injection needle protective cover disclosed in CN2024100447803. However, this type of safety injection needle generally only has one bending point for the cap to flip between its initial position, working position (the protective cap flips to move the needle away from the maximum position of the protective cap groove for puncture), and discard position (the protective cap rotates to place the needle in the groove and below the locking plate, where it is locked by the locking plate). This arrangement places the initial position and the discard position at the same location. This means that when flipping the protective cap from the initial position to the working position, the needle must squeeze the locking plate to disengage the protective cap groove. Repeated squeezing of the locking plate can easily cause it to fail during discard, posing a risk of the needle disengaging from the groove and potentially injuring medical personnel. The simple design of two bending points makes it impossible to ensure that a specific bending point is used during actual cap flipping, thereby reducing the effectiveness and reliability of the cap flipping action and thus affecting its effectiveness. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a new safety injection needle with a rational structural design, which can ensure the accuracy and effectiveness of the flipping action and position of the protective cap, thereby ensuring safety in use.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] The invention relates to a novel safety injection needle, comprising a needle seat with an injection needle tube and a protective cap, wherein the protective cap is provided with a groove for accommodating the injection needle tube, the top and one side of the groove are open, and locking plates are provided on both inner sides of the groove, the needle seat is fixed to a limiting plate, and the needle seat is located on one side of the open end of the groove, and a connecting piece is connected between the protective cap and the limiting plate, one end of the connecting piece is hinged or softly connected to the protective cap, and the other end is hinged or softly connected to the limiting plate, so that the protective cap can be flipped away from the needle seat or close to the needle seat relative to the needle seat; there are two locking positions between the protective cap and the needle seat: one is a first locking position in which the injection needle tube is placed in the protective cap groove, and the other is a second locking position in which the injection needle tube is operated after being separated from the protective cap groove. Specifically, groove locking parts are formed on both inner sides of the groove and close to the open end of one side of the groove. Correspondingly, The locking member is locked to the first locking position by pressing the second limit lock member against the bottom of the protective cap and the locking member is locked to the first locking position by pressing the second limit lock member against the bottom of the protective cap.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] The utility model is provided with a transition piece, etc., and in the process of flipping the protective cap from the initial position to the working position, the protective cap can only be flipped by the hinge or soft connection between the connecting piece and the protective cap due to the involvement of the transition piece. In the working position, the connecting piece and the protective cap are locked. In the process of flipping the protective cap, the thin-wall connection of the transition piece is pulled and disconnected, and the protective cap can only be flipped by the hinge or soft connection between the connecting piece and the limit plate, thereby effectively ensuring the effectiveness and accuracy of the flipping action of the protective cap and ensuring the safety of use of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0009] Figure 2 This is a schematic diagram of the back structure of the utility model after removing the injection needle;

[0010] Figure 3 This is a schematic diagram of the structure of the groove and the locking piece on the protective cap of the utility model;

[0011] Figure 4 This is a schematic diagram of the position structure of the transition piece and the like described in the present invention. DETAILED DESCRIPTION

[0012] The present invention will now be further described with reference to the accompanying drawings. The following parts not described in detail are all based on the prior art in this field.

[0013] like Figure 1-4 As shown, the present invention provides a novel safety injection needle, comprising a needle hub 2 with an injection needle tube 1, and a protective cap 3. The injection needle tube 1 is fixedly connected to the needle hub 2 in a conventional manner. The protective cap 3 is provided with a groove 3.1 for accommodating the injection needle tube 1 and the needle hub 2. The groove 3.1 is open at the top and left side. A pair of or more locking plates 4 are integrally formed or fixedly connected on both inner sides of the groove 3.1. Each pair of locking plates 4 consists of two locking plates, and the locking plates 4 are made of medical plastic or rubber. The needle hub 2 is fixedly connected to a stop plate 5, located on the left side of the groove 3.1. The needle hub 2 is fixedly connected to the stop plate 5 in a conventional manner. A first stop locking portion 6 (with a semi-elliptical or semi-nearly elliptical cross-section, with a slightly pointed end facing outward) is formed on both front and rear sides of the stop plate 5. Correspondingly, a groove locking portion 7 (claw-shaped, such that when the first stop locking portion 6 is squeezed in, the first stop locking portion 6 first contacts the groove locking portion 7) is formed on both front and rear sides of the left open end of the protective cap 3. The spacing between the two paired groove locking parts 7 gradually decreases at the inclined surface and increases at the arc surface from the side close to the first limiting locking part to the opposite side, and finally reaches the maximum at the limiting groove). When the needle seat 2 is flipped over and the injection needle tube 1 is placed in the groove 3.1, the two paired first limiting locking parts 6 are squeezed into the two groove locking parts 7 to achieve locking between the limiting plate 5 (needle seat 2) and the protective cap 3 (called the first locking position).

[0014] A connector 8 is connected between the protective cap 3 and the limiting plate 5. One end of the connector 8 is hinged to the protective cap 3, and the other end is hinged to the limiting plate 5. A second limiting locking portion 9 is formed at the bottom of the connector 8. The second limiting locking portion 9 is a pin with a convex arc shape facing the protective cap. Correspondingly, a protective cap locking portion 10 composed of two clamping columns is fixedly connected to the bottom of the protective cap 3 near the left end. Both clamping columns are formed with inclined surfaces and steps on the opposite sides of the two clamping columns to limit the second limiting locking portion 9. The spacing between the two clamping columns gradually decreases at the inclined surface and increases at the step from the bottom to the top. When the protective cap 3 is flipped to the working position of the injection needle, the second limiting locking portion 9 and the protective cap locking portion 10 are locked together, which is called the second locking position.

[0015] Taking into account that there are two bending parts (i.e., the left and right ends of the connecting member 8) during the flipping process of the protective cap, if there is no other force involved, the flipping process may not necessarily be performed according to the preset setting, that is, each flip cannot be guaranteed to be performed at a certain bending part, which makes the flipping action of the protective cap uncertain, and the safety performance and normal use of the utility model cannot be effectively achieved. Therefore, the inventors of the present application connected a transition piece 11 between the connecting member 8 and the limiting plate 5 and below the hinged portion between the connecting member 8 and the limiting plate 5. The transition piece 11 is inclined downward from the connecting member 8 to the limiting plate 5. The transition piece 11 and the connecting member 8 are connected by a thick wall, while the transition piece 11 and the limiting plate 5 are connected by a thin wall (and this portion is located at the top of the outer edge of the step on one side of the limiting plate 5). When the second limiting locking portion 9 and the protective cap locking portion 10 are locked with each other, during the process of flipping the protective cap 3, the thin wall connection between the transition piece 11 and the limiting plate 5 is torn apart, unlocking the hinged portion between the connecting member 8 and the limiting plate 5. At this time, the hinged portion between the connecting member 8 and the protective cap 3 is temporarily locked due to the existence of the second locking position, thereby allowing the protective cap 3 to flip along the hinged portion between the connecting member 8 and the limiting plate 5. This approach of the present invention can effectively ensure the accuracy and effectiveness of the flipping of the protective cap 3.

Claims

1. A novel safety injection needle, comprising a needle holder with an injection needle tube, a protective cap, and a groove for accommodating the injection needle tube on the protective cap, the top and one side of the groove are open, a connecting piece is connected between the protective cap and the needle holder, one end of the connecting piece is hinged or softly connected to the protective cap, and the other end is hinged or softly connected to the limit plate, and there are two locking positions between the protective cap and the needle holder: one is a first locking position in which the injection needle tube is placed in the protective cap groove, and the other is a second locking position in which the injection needle tube is out of the protective cap groove and works, characterized in that: A transition piece is connected between the connecting piece and the limiting plate. The transition piece and the connecting piece are connected by thick walls, while the transition piece and the limiting plate are connected by thin walls. When in the second locking position, the protective cap is flipped over and the thin-wall connection between the transition piece and the limiting plate is torn off.

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