Elastic assembly of injector

Abstract

The utility model belongs to the technical field of injection equipment, particularly relates to an elastic component of an injector, and solves the problems that the structure is complicated, and the elastic component cannot adapt to injection barrels of various specifications. The elastic assembly of the injector comprises a damping ring which is arranged between a supporting piece and a syringe, is in a wave shape and is made of an elastic material, and the upper end of the damping ring is connected with the lower end of the supporting piece. The elastic assembly of the injector is simple in structure, capable of absorbing shock and capable of being matched with injection barrels of various specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection equipment, and particularly relates to an elastic component of a syringe. Background Art

[0002] At present, most disposable syringes, automatic syringes or safety syringes are provided with spring components separately in order to match the deviation of the axial dimensions of the syringe barrel itself, especially to reduce the vibration during assembly and use. However, the spring components increase the number of structural parts, which also leads to the increase of assembly steps and tooling of this step in automated production. Therefore, in the prior art, a damping component is provided at the tail end of the axial support or support component, and the damping component is made integrally with the support or support component. This method can reduce the number of assembly parts, thereby reducing the automation steps. The damping component has a similar function to the spring component and can absorb the impact force during assembly and use.

[0003] Patent No. CN107683154A discloses a syringe holder for supporting the axial position of a syringe relative to the housing of an automatic injector, wherein the syringe holder comprises: a protruding portion, the protruding portion protruding from the syringe holder in a distal direction; and a flexible portion, the flexible portion axially adjacent to the protruding portion and adapted to cause the syringe to deflect axially in the housing in a distal direction. Patent No. CN107683154A also relates to an automatic injector.

[0004] The above-mentioned prior art achieves the effect of elastic expansion and contraction by providing a flexible part in the form of a curved beam or a spring arm. This structure is difficult to process and is provided on both sides, resulting in poor structural stability. Moreover, it cannot adapt to radial dimension deviations. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes an elastic component of a syringe with a simple structure and adaptable to syringe barrels of various specifications.

[0006] In order to realize the purpose of the innovation of the utility model, the following technical scheme can be used: an elastic component of a syringe includes a damping ring which is arranged between a support and a syringe barrel and is wavy and made of elastic material, wherein the upper end of the damping ring is connected to the lower end of the support.

[0007] The damping ring is wavy and made of elastic material. It can be stretched and deformed in the axial direction and is elastic to reduce vibration during use. The upper end of the damping ring is connected to the support, and the lower end of the damping ring is against the syringe to limit the installation of the syringe. When the wavy damping ring is compressed, its radial diameter expands and the force is more uniform. In addition, the distance between the support and the syringe holder is balanced through the deformation and expansion of the damping ring to ensure smooth installation and match syringes of more specifications and lengths.

[0008] In the elastic component of the above-mentioned syringe, there are a plurality of damping rings distributed along the axial direction.

[0009] A plurality of damping rings are provided to increase the range of deformable capacity and provide a better elastic damping effect.

[0010] In the elastic component of the above-mentioned syringe, the damping ring is provided with a plurality of crests and a plurality of troughs, and the crests and troughs between any two adjacent damping rings are arranged alternately, and the top damping ring is connected to the lower end of the support member through the crests.

[0011] The wave crests and wave troughs of adjacent damping rings are staggered to ensure that adjacent damping rings can exhibit axial elastic damping without overlapping each other and losing their compressibility. The wave crests of the damping rings are connected to the lower end of the support member, ensuring that the damping rings can be compressed on the support member to form an elastic damping effect.

[0012] In the above-mentioned elastic assembly of the syringe, the wave crest of the damping ring at the top is connected to the supporting member as a whole.

[0013] The support member is directly connected to the wave crest of the damping ring to form an integrated structure, thereby ensuring elastic damping capacity while having good structural strength.

[0014] In the elastic assembly of the syringe, the wave crest of the damping ring at the top is connected to the support member via a connector, and both sides of the connector are provided with concave arc portions connecting the lower end surface of the support member and the upper end surface of the damping ring.

[0015] The connector connects the wave crest and the support member, so that the damping ring has a larger elastic deformation process and a better elastic damping effect. The concave arc portion makes the connection between the damping ring and the support member smoother. At the same time, the connection position is easier to bend, which is conducive to the deformation compression of the damping ring and the good elastic damping effect.

[0016] In the elastic component of the syringe mentioned above, the wave trough and the wave crest between two adjacent damping rings are connected via the heightening body.

[0017] The heightening body connects adjacent damping rings, so that the distance between adjacent damping rings is increased, which is more conducive to compression deformation and has a good damping effect.

[0018] In the elastic assembly of the syringe, the height-increasing body is integrally connected with the upper and lower damping rings respectively.

[0019] The height-enhancing body and the adjacent damping ring are connected as an integrated structure, which has good structural strength, while reducing the number of parts and improving overall stability.

[0020] In the elastic component of the syringe, arc-shaped inner chamfers are provided on both sides between the upper and lower ends of the height-enhancing body and the upper and lower damping rings.

[0021] The arc-shaped inner chamfer makes the connection between the damping rings smoother and easier to bend, which is conducive to the compression and deformation of the damping rings and has a better damping effect.

[0022] In the elastic component of the above-mentioned syringe, there are two damping rings.

[0023] Two damping rings are provided, which have good elastic damping effect.

[0024] In the elastic component of the syringe mentioned above, the support member is cylindrical, and the outer diameter of the damping ring is smaller than or equal to the outer diameter of the support member.

[0025] Compared with the prior art, the utility model has the following advantages:

[0026] 1. The damping ring of the elastic component of the syringe is integrally formed on the support member, which has a simple structure, reduces the number of parts, and improves the overall stability;

[0027] 2. Multiple damping rings are arranged alternately at the wave crests and troughs to increase the overall deformation and expansion capacity;

[0028] 3. Arc-shaped inner chamfers and concave arc portions are respectively provided at the connection positions between the damping rings and between the damping rings and the support members, which are more conducive to bending and forming a better elastic damping effect;

[0029] 4. The damping ring is wavy in shape, and after axial extrusion, the diameter in the radial direction becomes larger so that it can match syringes of more specifications, and also makes the force more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 1 is a schematic diagram of the structure of the elastic component of the syringe of the utility model (embodiment 1);

[0031] Figure 2 It is a front view of the support member and the damping ring of the elastic component of the syringe of the utility model (Example 1);

[0032] Figure 3 It is a side view of the support member and the damping ring of the elastic component of the syringe of the utility model (Example 1);

[0033] Figure 4 It is a front view of the support member and the damping ring of the elastic component of the syringe of the utility model (Example 2);

[0034] Figure 5 It is a side view schematic diagram of the shape change of the damping ring of the elastic component of the syringe of the utility model when it is under pressure in use (Example 1);

[0035] Figure 6 It is a front view schematic diagram of the shape change of the damping ring of the elastic component of the syringe of the utility model when it is under pressure in use (Example 1).

[0036] In the figure, the support member 1, the injection cylinder 2, the damping ring 3, the wave crest 31, the wave trough 32, the connecting body 33, the concave arc portion 34, the heightening body 35, the arc-shaped inner chamfer 36, and the syringe bracket 4. DETAILED DESCRIPTION

[0037] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0038] Example 1

[0039] Specific implementation examples Figure 1-3 As shown in Figures 5 and 6, the elastic component of the syringe includes a damping ring 3 which is arranged between the support member 1 and the injection barrel 2 and is wave-shaped and made of elastic material. The upper end of the damping ring 3 is connected to the lower end of the support member 1.

[0040] Specifically, the damping ring 3 is in a wavy line and is made of an elastic material. It can be stretched and deformed in the axial direction and has elasticity to reduce vibration during use. The upper end of the damping ring 3 is connected to the support 1, and the lower end of the damping ring 3 is against the syringe 2 to limit the installation of the syringe 2. When the wavy damping ring 3 is compressed, its radial diameter is expanded, the force is more uniform, and more radial dimensions can be adapted. In addition, through the deformation and expansion of the damping ring 3, the distance between the support 1 and the syringe holder 4 is balanced to ensure smooth installation and match syringes 2 of more specifications and lengths.

[0041] like Figure 1 , 2 As shown in FIG. 3 , there are two damping rings 3 and they are distributed along the axial direction, which increases the maximum range of deformation and has a better elastic damping effect.

[0042] like Figure 2 , 3As shown, the damping ring 3 is provided with two wave crests 31 and two wave troughs 32, and the wave crests 31 and wave troughs 32 between any two adjacent damping rings 3 are arranged alternately, and the wave crests 31 of the top damping ring 3 are connected to the support member 1 through a connector 33, and both sides of the connector 33 are provided with concave arc portions 34 connecting the lower end surface of the support member 1 and the upper end surface of the damping ring 3. The wave troughs 32 and wave crests 31 between two adjacent damping rings 3 are connected to form an integral structure through an increase body 35. The upper and lower ends of the increase body 35 and the upper and lower damping rings 3 are provided with arc-shaped inner chamfers 36 on both sides.

[0043] Specifically, the wave crests 31 and wave troughs 32 of adjacent damping rings 3 are arranged in a staggered manner, ensuring that adjacent damping rings 3 can exhibit axial elastic damping without overlapping each other and losing compressibility. The wave crests 31 of the damping ring 3 are connected to the lower end of the support 1, ensuring that the damping ring 3 can be compressed on the support 1 to form an elastic damping effect. The connector 33 connects the wave crests 31 and the support 1, so that the damping ring 3 has a larger elastic deformation process and a better elastic damping effect. The concave arc portion 34 makes the connection between the damping ring 3 and the support 1 smoother, and the connection position is easier to bend, which is conducive to the deformation and compression of the damping ring 3. The heightening body 35 connects the adjacent damping rings 3, so that the distance between the adjacent damping rings 3 is increased, which is conducive to greater compression deformation and good damping effect. The heightening body 35 is connected to the adjacent damping rings 3 as an integrated structure, which has good structural strength, while simplifying the number of parts and improving the overall stability. The arc-shaped inner chamfer 36 makes the connection between the damping rings 3 smoother and easier to bend, which is conducive to the compression and deformation of the damping ring 3 and has a better damping effect.

[0044] Optimally, the support member 1 is cylindrical, and the outer diameter of the damping ring 3 is equal to the outer diameter of the support member 1. When not compressed and deformed, the support member 1 and the damping ring 3 have the same size, which is convenient for assembly.

[0045] Specific working principle: After installation, the damping ring 3 is compressed, and its lower end is against the upper part of the syringe 2, which limits the syringe 2 in the syringe support 4. The deformation and expansion of the damping ring 3 adjusts and balances the distance between the support 1 and the syringe support 4, and can adapt to syringes 2 of different specifications and lengths to ensure smooth assembly.

[0046] Example 2

[0047] The specific working principle of this embodiment is substantially the same as that of Embodiment 1, except for the connection between the damping ring 3 and the support member 1 .

[0048] Specific implementation examples Figure 4As shown, the crest 31 of the damping ring 3 at the top is connected as a whole with the support member 1. The support member 1 is directly connected to the crest 31 of the damping ring 3, forming an integrated structure, which ensures elastic damping capacity while having good structural strength.

[0049] It is also noted that, although the term "syringe" is used herein for the purpose of clarity and consistency, the term is not intended to be limiting. In some arrangements, the syringe may be, for example, a cartridge (e.g., the cartridge may be arranged to receive a disposable needle) or other medicament container. In some arrangements, the syringe / cartridge / medicament container may be integrally formed with an injection device (or a portion of the injection device). As used in this specification, the term "distal end" is intended to specify a position in the direction of the injection site toward the user's skin, while the term "proximal end" is intended to specify a position or direction away from the user's skin; the term "automatic syringe" may include an injection device that automatically inserts a needle and a device that requires the user to manually insert the needle.

[0050] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An elastic component of a syringe, characterized in that: The invention comprises a damping ring (3) which is arranged between a support member (1) and an injection cylinder (2) and is in a wave shape and is made of an elastic material. The upper end of the damping ring (3) is connected to the lower end of the support member (1). There are a plurality of damping rings (3) which are distributed along the axial direction. The damping ring (3) is provided with a plurality of wave crests (31) and a plurality of wave troughs (32). The wave crests (31) and wave troughs (32) between any two adjacent damping rings (3) are arranged in an interlaced manner. The damping ring (3) at the top is connected to the lower end of the support member (1) via the wave crests (31).

2. The elastic component of the syringe according to claim 1, characterized in that: The wave crest (31) of the damping ring (3) at the top is integrally connected to the support member (1).

3. The elastic component of the syringe according to claim 1, characterized in that: The wave crest (31) of the damping ring (3) at the top is connected to the support member (1) via a connector (33), and both sides of the connector (33) are provided with concave arc portions (34) connecting the lower end surface of the support member (1) and the upper end surface of the damping ring (3).

4. The elastic component of the syringe according to claim 1, characterized in that: The wave trough (32) and the wave crest (31) between two adjacent damping rings (3) are connected via a heightening body (35).

5. The elastic component of the syringe according to claim 4, characterized in that: The height-increasing body (35) is integrally connected to the upper and lower damping rings (3) respectively.

6. The elastic component of the syringe according to claim 5, characterized in that: Arc-shaped inner chamfers (36) are provided on both sides between the upper and lower ends of the height-enhancing body (35) and the upper and lower damping rings (3).

7. The elastic component of a syringe according to any one of claims 1 to 6, characterized in that: There are two damping rings (3).

8. The elastic component of a syringe according to any one of claims 1 to 6, characterized in that: The support member (1) is cylindrical, and the outer diameter of the damping ring (3) is smaller than or equal to the outer diameter of the support member (1).

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