Safe injection needle

Abstract

The utility model discloses a safety injection needle which comprises a needle head seat, a needle head and a side protection sleeve, one end of the needle head is fixed on the needle head seat in an inserted mode, one end of the side protection sleeve is connected to one side of the needle head seat in a rotating mode, a protection cavity is formed in one side of the side protection sleeve, a limiting piece is arranged in the protection cavity, and the limiting piece is connected with the needle head seat in a rotating mode. The limiting piece comprises a plurality of limiting strips, and the multiple limiting strips are located at the outlet of the protection cavity and limit the needle head in the protection cavity. The effect of improving the stability of the needle in the side protective sleeve is achieved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a safe injection needle. Background Technology

[0002] Injection needles are typically disposable and discarded after use. To prevent the exposed needle tip from causing puncture wounds to personnel handling the needle, a side protective sleeve is attached to the needle holder. For example, a Chinese patent discloses a safety injection needle (application number 201720519795.6). When in use, the needle cap can be removed, and the needle tip can be used to inject or draw medication into the human body. After use, the side protective sleeve is rotated so that it covers the needle tip from the side, effectively preventing the exposed needle tip from causing puncture wounds to personnel handling the needle. However, since the side protective sleeve and the needle holder are connected by a hinge, when the needle tip is covered by the side protective sleeve, the sleeve may rotate under special circumstances, causing the needle tip to detach from the sleeve and potentially puncture the personnel handling the needle. Utility Model Content

[0003] The purpose of this invention is to provide a safe injection needle to address the defects and shortcomings of existing technologies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The device includes a needle holder, a needle, and a side protective sleeve. One end of the needle is inserted and fixed to the needle holder, and one end of the side protective sleeve is rotatably connected to one side of the needle holder. One side of the side protective sleeve has a protective cavity, and a limiting member is provided in the protective cavity. The limiting member includes multiple limiting strips, which are located at the outlet of the protective cavity and restrict the needle within the protective cavity.

[0006] Preferably, the plurality of limiting strips are arranged in an alternating pattern and respectively disposed on both sides of the protective cavity.

[0007] Preferably, the limiting strip is inclined inward.

[0008] Preferably, one end of the side protective sleeve is provided with a locking buckle, which is fastened and fixed to the end of the needle holder.

[0009] Preferably, the side protective sleeve has stabilizing plates on both sides near the needle holder, and the needle holder is located between the two stabilizing plates and fits against each other.

[0010] Preferably, one end of the side protective sleeve is provided with a rotating rod, the side wall of the needle holder is provided with a rotating seat, the rotating rod is rotatably connected to the rotating seat, the side wall of the rotating seat is provided with a limiting block, and the inner side wall of the side protective sleeve is provided with a snap-fit ​​groove for the limiting block to snap and fix.

[0011] Preferably, the side wall of the rotating seat is provided with a connecting groove, and the rotating rod can slide into the rotating seat along the connecting groove.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] 1. After use, the injection needle can be rotated on the side wall of the needle holder, allowing the needle to slide into the protective cavity from one side of the side protective sleeve. During this process, the needle will pass through the limiting strip. Since the limiting strip is inclined inward, the needle can easily slide into the protective cavity. Subsequently, the needle is prevented from coming out of the protective cavity by the blocking of multiple limiting strips, which improves the stability of the needle in the side protective sleeve.

[0014] 2. When the injection needle is in working condition, the side protective sleeve is located on one side of the injection needle and forms an angle. At this time, the limiting block is locked in the locking groove, so that the side protective sleeve will not affect the injection needle when it is in use. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of the injection needle of this utility model in its working state;

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a cross-sectional schematic diagram of the injection needle of this utility model in the discarded state;

[0018] Figure 4 This is a schematic diagram of the structure of the needle holder and side protective sleeve of this utility model;

[0019] Figure 5 This is a structural schematic diagram of the needle holder and side protective sleeve from another perspective.

[0020] In the diagram: 1. Syringe; 2. Needle holder; 3. Needle; 4. Side protective sleeve; 5. Protective cavity; 6. Rotating rod; 7. Rotating seat; 8. Rotating groove; 9. Connecting groove; 10. Limiting block; 11. Snap-fit ​​groove; 12. Limiting component; 13. Limiting strip; 14. Stabilizing plate; 15. Locking buckle. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] This application discloses a safe injection needle.

[0023] Reference Figure 1 It includes a syringe 1, a needle holder 2, a needle 3, and a side protective sleeve 4. The inner circumference of one end of the syringe 1 has an internal thread. One end of the needle holder 2 is threaded into one end of the syringe 1. One end of the needle 3 is inserted and fixed into the other end of the needle holder 2. One end of the side protective sleeve 4 is rotatably connected to the outside of the needle holder 2.

[0024] Reference Figure 1 and Figure 2 The side protective sleeve 4 has a protective cavity 5 inside. One side and the lower end of the protective cavity 5 are connected to the outside. A rotating rod 6 is integrally provided at the lower end of the side protective sleeve 4. A rotating seat 7 is integrally provided on one side of the needle seat 2. A rotating groove 8 is opened in the rotating seat 7. The rotating rod 6 is rotatably connected to the rotating groove 8. A connecting groove 9 is opened on the lower side of the rotating seat 7. The upper end of the connecting groove 9 is connected to the rotating groove 8. The diameter of the rotating groove 8 is larger than the width of the connecting groove 9. The rotating rod 6 can slide into the connecting groove 9 and then slide into the rotating groove 8.

[0025] A limiting block 10 is integrally formed on the side wall of the needle holder 2. The limiting block 10 is spherical, and a snap-fit ​​groove 11 is formed on the inner side wall of the lower end of the side protective sleeve 4. The limiting block 10 is snapped and fixed in the snap-fit ​​groove 11. When the injection needle is in working condition, the side protective sleeve 4 is located on one side of the injection needle. At this time, the limiting block 10 is snapped and fixed in the snap-fit ​​groove 11, so that the side protective sleeve 4 will not affect the injection needle when it is in use.

[0026] Reference Figure 3 and Figure 4 The inner wall of the protective cavity 5 at one side of the opening has a limiting member 12, which includes two limiting strips 13. The two limiting strips 13 are integrally set on the two side walls of the protective cavity 5, and the limiting strips 13 are inclined inward. After the injection needle has been used, one end of the side protective sleeve 4 can be rotated against the side wall of the needle holder 2, so that the needle 3 slides into the protective cavity 5 from one side of the side protective sleeve 4. During this process, the needle 3 will pass through the limiting strips 13. Since the limiting strips 13 are inclined inward, the needle 3 can easily slide into the protective cavity 5. Then, the needle 3 is prevented from detaching from the protective cavity 5 by the obstruction of the two limiting strips 13.

[0027] Reference Figure 5 The side protective sleeve 4 has stabilizing plates 14 on both sides near the needle holder 2. The needle holder 2 is located between the two stabilizing plates 14, and the side wall of the needle holder 2 is in contact with the inner side wall of the stabilizing plate 14. Under the constraint of the two stabilizing plates 14, the side protective sleeve 4 can be prevented from swaying left and right, so that the needle 3 will not collide with the side wall of the protective cavity 5 when it is in the protective cavity 5, so that the injection needle can be reused after processing.

[0028] The outer ends of the two stabilizing plates 14 are each integrally provided with a locking buckle 15. The vertical cross section of the locking buckle 15 is a right-angled triangle. When the needle 3 is located inside the side protective sleeve 4, the side wall of the locking buckle 15 is fastened and fixed to the end face of the needle seat 2 near the syringe 1. When the locking buckle 15 is fastened to the end of the needle seat 2, the stability between the side protective sleeve 4 and the needle seat 2 can be further improved.

[0029] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A safety injection needle, comprising a needle holder (2), a needle (3), and a side protective sleeve (4), wherein one end of the needle (3) is inserted and fixed to the needle holder (2), one end of the side protective sleeve (4) is rotatably connected to one side of the needle holder (2), and one side of the side protective sleeve (4) has a protective cavity (5), characterized in that: The protective cavity (5) is provided with a limiting member (12), which includes multiple limiting strips (13). The multiple limiting strips (13) are located at the outlet of the protective cavity (5) and restrict the needle (3) within the protective cavity (5).

2. The safe injection needle according to claim 1, characterized in that, Multiple limiting strips (13) are arranged in an alternating pattern and respectively disposed on both sides of the protective cavity (5).

3. A safe injection needle according to claim 1, characterized in that, The limiting strip (13) is inclined inward.

4. A safe injection needle according to claim 1, characterized in that, One end of the side protective sleeve (4) is provided with a locking buckle (15), which is fastened and fixed to the end of the needle holder (2).

5. A safe injection needle according to claim 1, characterized in that, The side protective sleeve (4) has stabilizing plates (14) on both sides near the end of the needle holder (2), and the needle holder (2) is located between the two stabilizing plates (14) and fits together.

6. A safe injection needle according to claim 4, characterized in that, One end of the side protective sleeve (4) is provided with a rotating rod (6), the side wall of the needle seat (2) is provided with a rotating seat (7), the rotating rod (6) is rotatably connected to the rotating seat (7), the side wall of the rotating seat (7) is provided with a limiting block (10), and the inner side wall of the side protective sleeve (4) is provided with a snap-fit ​​groove (11) for the limiting block (10) to snap and fix.

7. A safe injection needle according to claim 6, characterized in that... The rotating seat (7) has a connecting groove (9) on its side wall, and the rotating rod (6) can slide into the rotating seat (7) along the connecting groove (9).

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