CN112043921A - A safe insulin needle - Google Patents

Abstract

The invention relates to a safety insulin needle, which comprises a shell, a needle seat sleeved in the shell, a needle head pierced in the needle seat, and a protective sleeve clamped with the needle seat; a connecting part is provided on the needle seat, The needle head is arranged in the connecting part, an elastic clamping part is arranged on the outer side of the connecting part, the protective sleeve is sleeved on the connecting part and is provided with a clamping hole for matching with the elastic clamping part, and the clamping hole is connected with the elastic clamping part. The upper and lower directions of the protective cover are limited after the joints are matched; the present invention is sleeved with a protective cover on the outside of the needle head, and the protective cover and the elastic clamping part on the needle seat can be clamped. After the use is completed, the protective cover and the elastic clip The joint is connected, and the needle is hidden in the protective cover, which can effectively prevent the needle from hurting people.

Description

A safe insulin needle

technical field

The present invention relates to a safe insulin needle.

Background technique

In the existing conventional insulin syringes and pen-type insulin syringes, the needle tips are exposed after use, and the needle tips need to be specially handled to prevent the exposed needle tips from hurting people, which makes the operation inconvenient and prone to accidents.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a safety insulin needle, which can cover the needle tip after use to prevent exposure and has high safety.

The technical scheme adopted in the present invention is:

A safety insulin needle, comprising a shell, a needle seat sleeved in the shell, a needle pierced in the needle seat, and a protective cover clamped with the needle seat;

A connecting portion is provided on the needle seat, the needle is arranged in the connecting portion, an elastic clamping portion is provided on the outer side of the connecting portion, and the protective sleeve is sleeved on the connecting portion and is provided with a clamp for matching with the elastic clamping portion. The connection hole, the clamping hole and the elastic clamping part cooperate to realize the limit of the protective cover in the upper and lower directions.

Further, a compression spring is sleeved on the outside of the connecting part, the bottom end of the compression spring is pressed against the protective sleeve, and the top end is pressed against the needle seat.

Further, downwardly inclined wings are provided on the top of the clamping hole, the ends of the wings protrude from the side wall of the protective sleeve, and the inner side of the bottom of the elastic clamping portion is provided with protrusions for matching with the wings. block, the vertical distance between the end of the fin and the bottom edge of the outer side wall of the clamping hole is less than the vertical distance between the upper and lower sides of the inner side of the bulge, and the vertical distance between the upper and lower sides of the inner side of the bulge is less than the clamping The vertical distance between the bottom edge of the outer side wall of the hole and the lower edge of the wing.

Further, the upper end surface of the protruding block is an inclined surface adapted to the wing.

Further, the bottom of the clamping hole is an inclined surface inclined downward, and the lower end surface of the protruding block is an inclined surface adapted to the bottom of the clamping hole.

Further, a step is provided on the inner wall of the protective sleeve, and the lower end of the compression spring is matched with the step.

Further, there are two elastic clamping parts, which are respectively arranged on the left and right sides of the connecting part.

Further, a connection cavity is provided on the top of the needle seat, an inner thread is provided on the inner wall of the connection cavity, and the top of the needle is located in the connection cavity.

Further, a sheath is also included, and the sheath is disposed outside the casing.

The positive effects of the present invention are as follows: in the present invention, a protective sleeve is sleeved outside the needle head, and the protective sleeve and the elastic clamping part on the needle seat can be clamped. The needle is hidden in the protective cover, which can effectively prevent the needle from hurting people.

At the same time, there is a spring above the protective cover, and the protective cover can gradually move on the line to expose the needle for injection. After the injection is completed, the protective cover moves downward under the action of the spring and is connected with the elastic clamping part. , thereby hiding the needle.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the sectional structure schematic diagram of the present invention;

Fig. 3 is the structural schematic diagram of the protective cover of the present invention;

FIG. 4 is a schematic diagram of the structure of the card holder of the present invention;

Figure 5 is a schematic diagram of the sheath structure of the present invention;

FIG. 6 is a schematic diagram of the explosion of the protective sleeve and the elastic clamping part of the present invention.

Detailed ways

As shown in Figures 1 and 2, the present invention includes a housing 1, a needle hub 4 installed inside the housing 1, a cylindrical connecting portion 8 mounted on the lower portion of the needle hub 4, mounted on the needle hub 4 and located in the connecting portion The elastic snap-on parts 5 on both sides of the 8, the protective sleeve 2 sleeved on the connecting part 8, and the needle 3 inserted in the connecting part 8, the top of the needle 3 is located in the connecting cavity on the top of the needle seat 4, and the bottom extends out. The housing 1 is provided with an inner thread on the inner wall of the connection cavity, which is used for cooperating with the corresponding part of the insulin pen. After the connection, the needle 3 is inserted into the insulin pen. The outer side of the needle seat 4 is provided with a clamping block, and the side wall of the housing 1 is provided with a clamping interface, and the two are connected together by a clamping structure. An opening is provided at the bottom of the housing 1 through which the protective cover 2 is fitted.

As shown in FIGS. 1 and 4 , the upper end sidewall of the protective cover 2 is provided with a clamping hole 10 for cooperating with the elastic clamping part 5 . When the clamping hole 10 cooperates with the elastic clamping part 5 , the limit is realized. , restricting the up and down movement of the protective cover 2 in the vertical direction, so that the protective cover 2 is stuck.

A compression spring 9 is provided between the protective sleeve 2 and the needle seat 4, and the compression spring 9 always exerts a downward force on the needle seat, so that the protective sleeve 2 always maintains a downward movement trend.

As shown in FIG. 3 , the top of the snap hole 10 is provided with fins 7 which are inclined outward and gradually downward, and the ends of the fins 7 protrude from the side wall of the protective sleeve 2 (that is, the ends of the fins 7 and the protection The distance between the shaft centers of the sleeve 2 is greater than the distance between the outer side wall of the clamping hole 10 and the shaft center. When the protective sleeve 2 is cylindrical, the distance between the outer side wall of the clamping hole 10 and the shaft center is the protective sleeve. 2 outer diameter), a bump 6 for matching with the clip hole 10 is provided on the inner side of the end of the elastic snap portion 5 , and the top surface of the bump 6 is an inclined surface adapted to the wings 7 . As shown in FIG. 6 , the height of the bump 6 relative to the inner side of the connecting portion 8 in the vertical direction is defined as a; the vertical distance between the end of the wing 7 and the outer side wall of the bottom of the snap hole 10 is b; along the axial direction of the protective sleeve 2, it extends upward from the outer side wall of the bottom of the snap hole 10, and intersects with the bottom surface of the wing 7 at a point, the length of the extension line is c, and the length of the extension line is the snap connection The vertical distance between the bottom edge of the outer side wall of the hole 10 and the lower side edge of the wing 7 . The relationship between a, b, and c should satisfy b<a<c, so that when the protective cover 2 moves upward, because a>b, the bumps 6 cannot be snapped into the clamping holes 10 at this time, and the bumps 6 only It can contact the outer side wall of the protective cover 2 after going over the wings 7 under the action of elastic force. When the protective cover 2 moves downward, because the end of the wing 7 protrudes from the side wall of the protective cover 2, the wing 7 will block the protrusion 6 at this time, and when the protective cover 2 continues to move downward, the protrusion 6 It will gradually move inward along the slope of the wing 7, and c>a, it will be snapped into the engaging hole 10. At this time, due to the matching relationship between the bump 6 and the snap hole 10, the protective cover 2 cannot continue to move downwards and upwards, so that the limit of the protective cover 2 is realized. At this time, the protective cover just hides the needle in its place. internal.

Preferably, in order to better achieve the limiting effect, the bottom surface of the snap hole 10 is also an inclined inclined surface, and its inclined direction is opposite to the inclined direction of the wing 7, and the bottom surface of the convex block 6 is a corresponding inclined surface. Make bump 6 form an approximate triangle.

The number of the elastic clamping parts 5 should be two or more, and they should be evenly distributed around the connecting part 8 .

A step is provided on the inner wall of the protective sleeve 2 , the lower end of the compression spring 9 is matched with the step, and the upper end is matched with the needle seat 4 .

As shown in FIG. 5 , a sheath 11 is also sheathed on the outside of the casing 1 to prevent the protective sheath from being operated incorrectly.

In the initial unused state, the wing 7 should be located below the bump 6 under the action of the compression spring 9, and the outer edge of the wing 7 is slightly larger than the opening at the bottom of the shell 1, and overlaps the opening at the bottom of the shell 1. It will not fall off, and the protective cover 2 completely hides the needle 5.

When the present invention is in use, firstly use the internal thread to install the present invention on the insulin pen as a whole, remove the sheath 11, and then press it to the injection site, the protective sheath 2 is forced to overcome the pressure of the compression spring 9 and gradually moves upward, and the wings 7 cross over The bumps are injected until the needle 5 protrudes from the protective sleeve 2 by a sufficient distance to meet the injection requirements. After use, the needle is pulled out from the human body, and the protective sleeve 2 loses the upward force along its axial direction. Under the force of the compression spring 9, the protective sleeve 2 moves downward, and the bump 6 is snapped into the snap hole 10. In this case, complete positioning is achieved, and the protective cover 2 cannot move axially again. At this time, the needle 5 is completely inside the protective cover 2, which effectively prevents accidental injury to others.

Claims (9)

1. A safe insulin needle is characterized by comprising a shell (1), a needle base (4) sleeved in the shell (1), a needle head (3) penetrating in the needle base (4) and a protective sleeve (2) clamped with the needle base (4);

be equipped with connecting portion (8) on needle file (4), syringe needle (3) set up in connecting portion (8), are equipped with elasticity joint portion (5) in the outside of connecting portion (8), lag (2) cover is put on connecting portion (8) and be equipped with on lag (2) be used for with elasticity joint portion (5) complex joint hole (10), realize the spacing of lag (2) upper and lower direction after joint hole (10) and the cooperation of elasticity joint portion (5).

2. The safety insulin needle according to claim 1, characterized in that the connecting part (8) is sleeved with a compression spring (9), the bottom end of the compression spring (9) is pressed against the protective sleeve (2), and the top end is pressed against the needle seat (4).

3. The safety insulin needle according to claim 1, characterized in that a downwardly inclined wing (7) is provided on the top of the locking hole (10), the distal end of the wing (7) protrudes out of the side wall of the protective cover (2), a protrusion (6) for engaging with the wing (7) is provided on the inner side of the bottom of the elastic locking portion (5), the vertical distance between the distal end of the wing (7) and the bottom edge of the outer side wall of the locking hole (10) is smaller than the vertical distance between the upper and lower sides of the inner side wall of the protrusion (6), and the vertical distance between the upper and lower sides of the inner side wall of the protrusion (6) is smaller than the vertical distance between the bottom edge of the outer side wall of the locking hole (10) and the lower side of the wing (7).

4. A safety insulin needle according to claim 3, characterized in that the upper end surface of the protrusion (6) is a slant surface adapted to the wing (7).

5. The safety insulin needle according to claim 1 or 3, characterized in that the bottom of the locking hole (10) is a slope inclined downwards, and the lower end surface of the projection (6) is an inclined surface matched with the bottom of the locking hole (10).

6. A safety insulin needle as claimed in claim 2, characterized in that a step is provided on the inner wall of the protective cover (2), and the lower end of the compression spring (9) is engaged with the step.

7. The safety insulin needle according to claim 1, wherein the two elastic clamping parts (5) are respectively arranged at the left and right sides of the connecting part (8).

8. A safety insulin needle as claimed in claim 1, characterized in that a connecting cavity is provided at the top of said needle holder (4), an internal thread is provided on the inner wall of the connecting cavity, and the top of said needle head (3) is located in the connecting cavity.

9. A safety insulin needle according to claim 1, characterized by further comprising a sheath (11), said sheath (11) being arranged outside the housing (1).

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