Needle head protection assembly

Abstract

The utility model relates to a needle protection assembly which at least comprises a packaging state and a containing state and comprises a needle seat and a protection arm, the protection arm is provided with a containing cavity for containing a needle, the needle seat is provided with a third clamping structure and a first clamping structure which are used in the containing state, and the protection arm is provided with a first combination structure and a third combination structure. The third combination structure comprises a third combination step, the third clamping structure comprises a vertically upward clamping plate, and the clamping plate is provided with a protrusion facing the third combination step. The third clamping structure is arranged on the side, away from the protection arm, of the needle base, the structure of the joint of the needle base and the protection arm is simplified, and die design and machining during production are facilitated; in the storage state, the first clamping structure and the third clamping structure are located on the two sides of the needle base, so that stress on the two sides of the protection arm is more balanced, and clamping and grounding are firmer in the storage process.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a needle protection component. Background Art

[0002] In medical practice, in order to prevent the used needle from being exposed and thus piercing or scratching human skin and causing bacterial infection, a protective arm is added to the needle of the syringe to protect the needle before and after use.

[0003] The existing protective arm will use a buckle structure to fix the protective arm before, during and after use. For example, a "needle protection device and safety needle assembly" disclosed in a Chinese patent document has a publication number of CN102363056B, which includes a connecting portion and a protective arm that can rotate relative to the connecting portion, a pair of holding members are respectively formed on the proximal end and the connecting portion of the protective arm, and are used to engage in a non-retractable manner after use, and a pair of positioning arms are respectively formed on the proximal end and the connecting portion of the protective arm, and are formed with at least one pair of complementary snap-fit ​​features, and the paired snap-fit ​​features can be engaged in a detachable manner. However, since the buckle structures are all arranged on the inner side of one side close to the protective arm, the space here is small, and the structure of the connection between the protective arm and the needle seat is complex, resulting in a complex production process, and it is easy to interfere with the snap-fit ​​stability when re-stored after use due to damage caused by early use. If the buckle structure is arranged on the outside of the protective arm, it is easy to be damaged during transportation, and the outer protective arm still causes a complex production process. Utility Model Content

[0004] In order to solve the problem that the connection between the protection arm and the needle seat of the existing needle protection device is complex and leads to insufficient structural stability, a needle protection assembly with a simplified connection between the protection arm and the needle seat and a more solid structure is provided.

[0005] The technical solution provided by the utility model is as follows:

[0006] A needle protection assembly comprises a needle seat for mounting a needle and a protection arm rotatably connected to the needle seat, and comprises at least a packaging state and a storage state according to the relative position of the protection arm and the needle seat, wherein the protection arm is provided with a cavity for accommodating the needle, and is characterized in that:

[0007] A third clamping structure used in a storage state is provided on a side of the needle seat away from the protective arm, a first clamping structure is provided on a side of the needle seat close to the protective arm, and the protective arm is provided with a first coupling structure corresponding to the first clamping structure and a third coupling structure corresponding to the third clamping structure;

[0008] The third coupling structure includes a third coupling step arranged on the side wall surface of the cavity, and the extension direction of the third coupling step is from the opening of the cavity to the bottom surface of the cavity. The third clamping structure includes a vertically upward clamping plate, and the clamping plate is provided with a protrusion adapted to the third coupling step toward the third coupling step.

[0009] The first clip-on structure in the packaging state is arranged on the side of the needle seat away from the protective arm. Although it is still arranged in the cavity of the protective arm, the third clip-on structure in the storage state is arranged on the side of the needle seat close to the protective arm, thereby simplifying the mechanism of the connection between the needle seat and the protective arm, and facilitating mold design and processing during production; in the storage state, the first clip-on structure and the third clip-on structure are located on both sides of the needle seat, so that the force on both sides of the protective arm is more balanced, making the clip-on connection more secure when stored.

[0010] Preferably, the third combination structure further comprises a secondary combination step, which is arranged in parallel with the third combination step to form a clamping groove structure. The secondary combination step can prevent the third combination step from excessively bending counterclockwise after clamping the protrusion, thereby causing damage to the needle protection device and the needle, making the structure more solid.

[0011] Preferably, the third combining step extends from the lower left to the upper right, that is, a side of the third combining step away from the opening of the cavity is closer to the needle seat than a side close to the opening of the cavity.

[0012] For the convenience of description and understanding, the direction indicated by the needle is upward, and the third coupling structure is located on the left side of the needle seat. In the storage state, the protrusion is engaged in the engaging groove formed by the third engaging step and the auxiliary engaging step, and the protrusion is a certain distance away from the notch on the left. The engaging groove can prevent the protective arm from moving to the right. The principle is: if the protective arm moves to the right, the protrusion moves to the right along the engaging groove to force the protective arm to move upward, and the connection between the protective arm and the needle seat can block the upward movement of the protective arm, and the two offset each other, thereby preventing the protective arm from moving to the right.

[0013] Preferably, the first clamping structure includes a vertical cantilever and a convex buckle facing the cavity, and the first combining structure includes a first table surface, which is partially or completely detachably clamped on a side of the convex buckle close to the needle seat in the packaged state. In the packaged state, only the first table surface needs to be provided on the protective arm, which simplifies the structure of the protective arm.

[0014] Preferably, the first combining structure also includes a second table top. In the storage state, part or all of the second table top is snapped onto the side of the protruding buckle close to the needle seat. The second table top is smoothly connected to the first table top and is located on the side of the first table top close to the bottom surface of the cavity.

[0015] When storing, the protective arm is rotated counterclockwise so that the convex buckle is inserted into the first table surface and then smoothly slides into the second table surface to form a clamping structure, thereby preventing the protective arm from rotating counterclockwise in the stored state, making the clamping more secure. At the same time, it can also prevent the protective arm from moving upward when the protective arm moves rightward along the clamping groove, so that even if the connection between the needle seat and the protective arm is broken in the stored state, the needle can be wrapped without being exposed.

[0016] Preferably, the first table top and the second table top are both planes, and the first table top and the second table top are connected by an inclined surface, that is, the first table top and the second table top form a stepped shape.

[0017] Preferably, the relative position of the protective arm and the needle holder also includes a use state, the needle holder is provided with a second clamping structure for detachably clamping in the use state on the side facing the protective arm, the cavity is provided with a second coupling structure corresponding to the second clamping structure, the second clamping structure includes a clamping hole, and the second coupling structure includes a convex portion with an enlarged head. The clamping of the second clamping structure and the second coupling structure can prevent the shaking of the protective arm from affecting the use, and can be separated when it needs to be stored after use.

[0018] Preferably, the second clamping structure further comprises a stopper tab disposed in the clamping hole, and the stopper tab can be directly destroyed when the second clamping structure is separated, thereby simplifying the second clamping structure.

[0019] Preferably, the first combining structure and the second combining structure are staggered in the width direction of the protection arm.

[0020] Preferably, the needle seat and the protection arm are flexibly connected together. For example, the plastics of the needle seat and the protection arm can be softened so that the needle protection assembly can be integrally formed without the need for installation and other processes.

[0021] Compared with the prior art, the needle protection assembly of this embodiment has the following beneficial effects:

[0022] The third clamping structure is arranged on the side of the needle seat away from the protective arm, which simplifies the structure of the connection between the needle seat and the protective arm and facilitates mold design and processing during production; in the storage state, the first clamping structure and the third clamping structure are located on both sides of the needle seat, so that the force on both sides of the protective arm is more balanced, making the clamping more firmly when stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front structural schematic diagram of the first embodiment of the utility model in a packaging state;

[0024] Figure 2 This is a schematic cross-sectional structure diagram of the first embodiment of the utility model in a packaging state;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model in a packaging state;

[0026] Figure 4 This is a front structural schematic diagram of the first embodiment of the utility model in use;

[0027] Figure 5 This is a three-dimensional structural schematic diagram of the first embodiment of the utility model in use;

[0028] Figure 6 This is a front structural schematic diagram of the first embodiment of the utility model in the storage state;

[0029] Figure 7 It is a schematic cross-sectional structure diagram of the first embodiment of the utility model in the storage state;

[0030] Figure 8 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model in the storage state;

[0031] Fig. 9 This is a schematic diagram of the three-dimensional structure of the first embodiment of the utility model without a needle structure;

[0032] Fig.10 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0033] Fig.11 for Figure 7 A magnified schematic diagram of point B in the middle.

[0034] Explanation of the reference numerals: protective arm 1, first table 111, second table 112, snap-fit ​​hole 12, stop tab 121, third engaging step 131, auxiliary engaging step 132, accommodating cavity 14, needle seat 2, convex buckle 21, convex portion 22, protrusion 23, needle head 3. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0036] For the convenience of description and understanding, the direction indicated by the needle is upward, and the third combination structure is located on the left side of the needle seat. Figure 1 , 2 , 6, and 7.

[0037] Embodiment 1, as Figure 1-11As shown, the needle protection assembly of this embodiment includes a packaging state, a use state and a storage state, and includes a needle seat 2 for mounting a needle 3 and a protection arm 1 connected to the needle seat 2. In this embodiment, the needle seat 2 and the protection arm 1 are flexibly connected by soft plastic, which is convenient for rotation and integrated molding. The needle seat 2 and the protection arm 1 can also be connected by a hinge. The protection arm 1 is provided with a cavity 14 for accommodating the needle 3.

[0038] A third clamping structure used in the storage state is arranged on the left side of the upper part of the needle seat 2, a first clamping structure is arranged on the right side of the upper part of the needle seat 2, and a second clamping structure facing the right side is arranged on the side surface of the right side of the needle seat 2.

[0039] The housing 14 is provided with a first combining structure corresponding to the first clamping structure, a second combining structure corresponding to the second clamping structure, and a third combining structure corresponding to the third clamping structure;

[0040] The first snap-fitting structure includes a vertical cantilever and a convex buckle 21 facing the cavity, and the first combining structure includes a first table top 111 and a second table top 112. In the packaging state, part or all of the first table top 111 can be detachably snapped onto the lower side of the convex buckle 21, and in the storage state, part or all of the second table top 112 is snapped onto the lower side of the convex buckle 21; the second table top 112 is smoothly connected to the first table top 111 and is located on the inner side of the first table top 111 close to the bottom surface of the cavity 14.

[0041] The third coupling structure includes a third coupling step 131 and a secondary coupling step 132 arranged on the side wall surface of the cavity 14. The secondary coupling step 131 is arranged in parallel with the third coupling step 131 to form a clamping groove structure. The clamping groove structure extends from the opening of the cavity 14 to the bottom surface of the cavity 14. The third clamping structure includes a vertically upward clamping plate, and the clamping plate is provided with a protrusion 23 adapted to the third coupling step facing the third coupling step.

[0042] The engaging groove structure formed by the secondary engaging step 312 and the third engaging step 131 is not parallel to the surface of the needle seat 2 in the stored state, that is, the left side of the third engaging step 131 is lower than the right side, and in the stored state, the protrusion 23 is not on the left edge of the third engaging step 131.

[0043] In this embodiment, the first table 111 and the second table 112 are both planes, and the first table 111 and the second table 112 are connected by an inclined surface. In order to adapt to the snap connection with the first table 111 and the second table 112, the protrusion 21 is inclined to the lower right.

[0044] The first table 111 and the second table 112 can also be set as annular surfaces and the first combining structure is a through hole. The axis of the through hole is inclined to the upper left, and the head of the convex buckle 21 expands. When in the packaging state, the convex buckle 21 is clamped on the first table 111. When in the storage state, the convex buckle 21 continues to move to the bottom of the cavity 14 and is clamped in the second table 112, and the head of the convex buckle 21 passes through the through hole, so that the right side can be kept more firmly clamped in the storage state, and the storage state can be maintained even if the connection between the protective arm and the needle seat is disconnected to avoid exposure of the needle.

[0045] The second clamping structure includes a clamping hole 12, and the second combining structure includes a convex portion 22 with an enlarged head. A stop convex piece 121 is arranged in the clamping hole 12. The first combining structure and the second combining structure are staggered in the width direction of the protective arm 1, with a second combining structure arranged in the middle and two first combining structures arranged at both ends.

[0046] When packaging, Figure 1-3 and Figure 10-11 As shown, the first table 111 of the first clamping structure is clamped on the lower side of the convex buckle 21 of the first structural structure. At this time, the needle 3 is covered with a needle sleeve, so the protection arm can only be rotated to an angle where it is still inclined, and does not surround the entire needle sleeve. It only serves to minimize the occupied space of the entire needle protection assembly and prevent damage caused by the movement of the protection arm during transportation.

[0047] Before use, after opening the needle protection sleeve, rotate the protection arm clockwise so that the convex portion 22 of the second coupling structure is inserted into the clamping hole 12 of the second clamping structure and is blocked by the stop convex piece 121, and enters the use state. Figure 4 and Figure 5 As shown, this prevents rotation interference operation when using injection.

[0048] After use, the protective arm is rotated counterclockwise so that the protrusion 23 of the third clamping structure can not be withdrawn and is clamped into the third combination step 131 of the third combination structure to form a storage state. Figure 6-8As shown, at the same time, the second table 112 of the first clamping structure is clamped on the lower side of the convex buckle 21 of the first structure, and the protective arm is kept in a vertical state to completely surround the needle in the housing 14 of the protective arm, preventing the needle from being directly exposed and causing harm to the staff. At this time, due to the inclined setting of the third combination step 131, even if the connection between the protective arm and the needle seat is broken, the protective arm cannot move to the right, and the movement of the protective arm to the left is blocked by the convex buckle 21 and the bottom surface of the housing 14, the counterclockwise rotation of the protective arm is blocked by the clamping of the convex buckle 21 and the second table 112, and the clockwise rotation of the protective arm is blocked by the protrusion 23 and the third combination step 131. Therefore, this embodiment can ensure that the protective arm still surrounds the needle after the connection between the protective arm and the needle is broken, and prevent the protective arm from squeezing the needle, which prevents the needle from being directly exposed or exposed due to squeezing and breaking, and greatly improves the safety and stability in the storage state.

[0049] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

Claims

1. A needle protection assembly, comprising a needle seat (2) for mounting a needle (3) and a protection arm (1) rotatably connected to the needle seat (2), the protection arm (1) comprising at least a packaging state and a storage state according to the relative position of the protection arm (1) and the needle seat (2), the protection arm (1) being provided with a cavity (14) for accommodating the needle (3), characterized in that: A third clamping structure used in a stored state is arranged on a side of the needle seat (2) away from the protective arm (1), a first clamping structure is arranged on a side of the needle seat (2) close to the protective arm (1), and the protective arm (1) is provided with a first coupling structure corresponding to the first clamping structure, and a third coupling structure corresponding to the third clamping structure; The third coupling structure comprises a third coupling step (131) arranged on the side wall surface of the cavity (14), the third coupling step (131) extending in a direction from the opening of the cavity (14) to the bottom surface of the cavity (14), and the third clamping structure comprises a clamping plate extending vertically upward, the clamping plate being provided with a protrusion (23) adapted to the third coupling step (131) and facing the third coupling step (131).

2. The needle protection assembly according to claim 1, characterized in that: The third combining structure further comprises a secondary combining step (132), and the secondary combining step (132) is arranged in parallel with the third combining step (131) to form a clamping groove structure.

3. The needle protection assembly according to claim 2, characterized in that: The third combining step (131) extends from the lower left to the upper right, that is, the side of the third combining step (131) away from the opening of the cavity (14) is closer to the needle seat (2) than the side close to the opening of the cavity (14).

4. The needle protection assembly according to claim 1, characterized in that: The first snap-fit ​​structure comprises a vertical cantilever and a convex buckle (21) facing the cavity (14), and the first coupling structure comprises a first table surface (111), and the first table surface (111) is partially or completely detachably snap-fitted to a side of the convex buckle (21) close to the needle seat (2) in a packaged state.

5. The needle protection assembly according to claim 4, characterized in that: The first combination structure also includes a second table top (112). In the storage state, part or all of the second table top (112) is snapped onto a side of the convex buckle (21) close to the needle seat (2). The second table top (112) is smoothly connected to the first table top (111) and the second table top (112) is located on a side of the first table top (111) close to the bottom surface of the cavity (14).

6. The needle protection assembly according to claim 5, characterized in that: The first table surface (111) and the second table surface (112) are both planes, and the first table surface (111) and the second table surface (112) are connected by an inclined plane.

7. The needle protection assembly according to any one of claims 1 to 6, characterized in that: The relative position of the protective arm (1) and the needle seat (2) also includes a use state, the needle seat (2) is provided with a second clamping structure on the side facing the protective arm (1), the cavity (14) is provided with a second coupling structure that can be detachably clamped with the second clamping structure when in the use state, the second clamping structure includes a clamping hole, and the second coupling structure includes a convex portion (12) with an enlarged head.

8. The needle protection assembly according to claim 7, characterized in that: The second clamping structure also includes a stopper protrusion (221) arranged in the clamping hole.

9. The needle protection assembly according to claim 7, characterized in that: The first combining structure and the second combining structure are staggered in the width direction of the protection arm (1).

10. The needle protection assembly according to any one of claims 1 to 6, characterized in that: The needle seat (2) and the protection arm (1) are flexibly connected together.

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