Quickly-assembled two-section type needle inserting device structure

Abstract

The invention relates to the field of needle inserting device structures, and discloses a quick-assembly two-section type needle inserting device structure which comprises a needle cylinder, an impact block is slidably connected into the needle cylinder, an end cover is in threaded connection with the top end of the needle cylinder, a second spring is fixedly connected to the bottom end of the end cover, and the other end of the second spring is fixedly connected with the top end of the impact block. The bottom end of the impact block is fixedly connected with a sheet microneedle, one side of the needle cylinder is fixedly connected with a pin, one side of the impact block is provided with a movable groove matched with the pin in shape in the vertical direction, the side, away from the pin, of the needle cylinder is provided with a release rod distributed in the vertical direction, and the middle of the release rod is rotationally connected with one side of the needle cylinder through a pin shaft; the top end of the release rod is elastically connected with one end of the needle cylinder through a first spring, and a limiting block is fixedly connected to the side, close to the needle cylinder, of the end, away from the first spring, of the release rod.

Description

Technical Field

[0001] The invention relates to the field of needle inserter structures, in particular to a quick-assembly two-stage needle inserter structure. Background Art

[0002] Microneedles are a new technology that has developed rapidly in recent years. Due to its advantages of precision, painlessness, high efficiency, and convenience, it is widely used in many medical fields such as drug delivery systems and micro-sampling analysis systems. The size of microneedles is in the micron level. The microneedle array penetrates the stratum corneum of the skin in a reversible and minimally invasive manner, forming a mechanical channel for biological macromolecules to pass through, avoiding the problem of reduced drug bioactivity utilization caused by gastrointestinal pH, digestive enzymes, and first-pass effect of the liver during oral administration, and can maintain a relatively stable blood drug concentration; at the same time, it also avoids the pain of needle pricking and skin damage caused by injection, so it does not cause pain or trauma.

[0003] There are two main types of existing needle inserter structures that are compatible with thin-film microneedles: a roller type, which requires the microneedle to be a ring-shaped structure, and the roller type structure is costly, and the depth and force of the needle insertion cannot be controlled, which affects the insertion effect; a mechanical type, which inserts the needle by manual pressure, and the depth and force of the needle insertion cannot be controlled, which affects the insertion effect. For this reason, the present application proposes a quick-assembly two-stage needle inserter structure to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a quick-assembly two-stage needle inserter structure to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a quick-assembly two-stage needle inserter structure, comprising a syringe, an impact block is slidably connected inside the syringe, and an end cover is threadedly connected to the top end of the syringe, a second spring is fixedly connected to the bottom end of the end cover, and the other end of the second spring is fixedly connected to the top end of the impact block, a thin sheet microneedle is fixedly connected to the bottom end of the impact block, and a pin is fixedly connected to one side of the syringe, a movable groove matching the shape of the pin is opened on one side of the impact block in the vertical direction, and a release rod distributed in the vertical direction is arranged on the side of the syringe away from the pin, the middle position of the release rod is rotatably connected to one side of the syringe through a pin shaft, and the top end of the release rod is elastically connected to one end of the syringe through a first spring, the end of the release rod away from the first spring is fixedly connected to a limiting block close to the side of the syringe, and the impact block is opened in the vertical direction with a first limiting groove and a second limiting groove that are engaged with the limiting block.

[0006] As a preferred embodiment, the thin-sheet microneedle is fixed to the bottom end of the impact block by adhesive bonding.

[0007] As a preferred embodiment, a strip groove matching the shape of the release rod and communicating with the impact block is opened on one side of the syringe.

[0008] As a preferred embodiment, a fixed height frame is fixedly penetrated and fixed on one side of the syringe close to the thin-sheet microneedles in a horizontal direction.

[0009] As a preferred embodiment, a sliding groove is provided at the center of the bottom end of the syringe, which is in sliding contact with the outer side of the impact block.

[0010] As a preferred embodiment, a second limiting groove is arranged at the top of the impact block, and the bottom end of the second spring is sleeved and fixed on the outer side of the second limiting groove at the top of the impact block.

[0011] According to the above-mentioned method for using a quick-assembly two-stage needle inserter structure, the following steps are included:

[0012] Step S1, fix the thin-sheet microneedle to the bottom end of the impact block by adhesive bonding, and then push the impact block upward in the vertical direction so that the second limiting groove on one side of the impact block is clamped and fixed with the limiting block at the bottom end of the release rod, and at the same time, the second spring is in a compressed state;

[0013] Step S2, placing the syringe at a designated location and determining the depth of the needle insertion by means of a height setting frame;

[0014] Step S3, pressing the release rod close to the first spring side, so that the limiting block releases the limiting of the first limiting groove, and the impact block drives the thin-sheet microneedle to release the needle insertion process under the elasticity of the second spring, and the pin abuts against the top of the inner wall of the movable groove of the impact block to stop the impact block from moving, and at the same time, the limiting block at the other end of the release rod is clamped and fixed to the second limiting groove under the elastic force of the first spring;

[0015] Step S4, unscrew the end cap threadably connected to the syringe to replace the second spring with a different elastic coefficient to adjust the impact force.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The two-stage needle inserter of the present invention can be adapted to thin-sheet microneedles of different models and costs;

[0018] The two-stage needle insertion device of the present invention facilitates the control of the needle insertion depth and force through the mechanical structure;

[0019] The pin fixedly arranged on one side of the syringe is combined with an active groove adapted to the shape of the pin opened on one side of the impact block, so that when the impact block moves downward in the vertical direction as the second spring is released, the top end of the pin abuts against the top end of the inner wall of the active groove of the impact block, thereby limiting the impact of the impact block, and preventing the impact block from being released in the compressed state of the second spring due to inertia, causing the needle insertion depth to be greater than the expected depth, thereby affecting the needle insertion depth accuracy. A release rod movably connected to the pin shaft is on the other side of the syringe, and the top end of the release rod is elastically connected to one end of the syringe by a first spring arranged in the horizontal direction, so that the impact block is always in a compressed state. The elastic force of the first spring can clamp and fix the limit block at the bottom end of the release rod with the first limit groove and the second limit groove, and in the release process of the impact block, the limit block is pulled out of the second limit groove through the elastic force of the first spring in the compressed state. When the impact block is displaced to the point where the first limit groove is directly opposite to the limit block, the limit block can be squeezed into the first limit groove under the elastic force of the first spring in the compressed state to realize the clamping and limiting fixing process, fix the second spring to the bottom end of the end cover, and thread the end cover to the top end of the syringe, so as to facilitate the replacement of the first spring with different elastic coefficients by unscrewing the end cover to meet the requirements of different impact forces of the impact block. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional view of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the external structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention.

[0023] In the figure: 1. syringe; 2. impact block; 3. release rod; 4. pin; 5. end cover; 6. pin shaft; 7. first spring; 8. second spring; 9. fixed height frame; 10. thin film microneedle; 11. limit block; 12. first limit groove; 13. second limit groove; 14. movable groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example

[0026] See also Figure 1-Figure 3, a quick-assembly two-stage needle inserter structure shown in the figure comprises a syringe 1, an impact block 2 is slidably connected inside the syringe 1, and an end cover 5 is threadedly connected to the top of the syringe 1, a second spring 8 is fixedly connected to the bottom end of the end cover 5, and the other end of the second spring 8 is fixedly connected to the top of the impact block 2, a thin sheet microneedle 10 is fixedly connected to the bottom end of the impact block 2, and a pin 4 is fixedly connected to one side of the syringe 1, and an active groove 14 matching the shape of the pin 4 is opened on one side of the impact block 2 in the vertical direction, and a release rod 3 distributed in the vertical direction is arranged on the side of the syringe 1 away from the pin 4, the middle position of the release rod 3 is rotatably connected to one side of the syringe 1 through a pin shaft 6, and the top of the release rod 3 is elastically connected to one end of the syringe 1 through a first spring 7, and the end of the release rod 3 away from the first spring 7 is fixedly connected to a limiting block 11 close to the side of the syringe 1, and the impact block 2 is opened along the vertical direction. The first limiting groove 12 and the second limiting groove 13 that are engaged with the limiting block 11 are snap-fitted.

[0027] In this embodiment, the thin film microneedle 10 is fixed to the bottom end of the impact block 2 by adhesive bonding, and a strip groove that matches the shape of the release rod 3 and is connected to the impact block 2 is opened on one side of the syringe 1. A fixed height frame 9 is fixedly penetrated in the horizontal direction on the side of the syringe 1 close to the thin film microneedle 10, and a sliding groove that is in sliding contact with the outer side of the impact block 2 is opened at the center of the bottom end of the syringe 1. A second limiting groove 13 is provided at the top of the impact block 2, and the bottom end of the second spring 8 is sleeved and fixed on the outside of the second limiting groove 13 at the top of the impact block 2.

[0028] Furthermore, by means of a pin 4 fixedly arranged on one side of the syringe 1, in combination with an active groove 14 which is formed on one side of the impact block 2 and matches the shape of the pin 4, when the impact block 2 moves downward in the vertical direction as the second spring 8 is released, the top end of the pin 4 abuts against the top end of the inner wall of the active groove 14 of the impact block 2, thereby limiting the impact of the impact block 2, thereby preventing the impact block 2 from being released in the compressed state of the second spring 8 due to inertia, causing the needle insertion depth to be greater than the expected depth, thereby affecting the needle insertion depth accuracy. A release rod 3 movably connected to the pin shaft 6 on the other side of the syringe 1 has a first spring 7 arranged in the horizontal direction at the top end of the release rod 3 elastically connected to one end of the syringe 1, thereby The elastic force of the spring 7 can clamp and fix the limit block 11 at the bottom end of the release rod 3 with the first limit groove 12 and the second limit groove 13, and in the release process of the impact block 2, the limit block 11 is pulled out of the second limit groove 13 through the elastic force of the compressed first spring 7. When the impact block 2 moves to the first limit groove 12 and is opposite to the limit block 11, the limit block 11 can be squeezed into the first limit groove 12 under the elastic force of the compressed first spring 7 to realize the clamping and limiting fixing process, fix the second spring 8 to the bottom end of the end cover 5, and thread the end cover 5 to the top end of the syringe 1, so as to facilitate the replacement of the first spring 7 with different elastic coefficients by unscrewing the end cover 5 to meet the requirements of different impact forces of the impact block 2.

[0029] In this embodiment, the method for using the above-mentioned quick-assembly two-stage needle inserter structure includes the following steps:

[0030] Step S1, fix the thin-sheet microneedle 10 to the bottom end of the impact block 2 by adhesive bonding, and then push the impact block 2 upward in the vertical direction, so that the second limiting groove 13 on one side of the impact block 2 is clamped and fixed with the limiting block 11 at the bottom end of the release rod 3, and at the same time, the second spring 8 is in a compressed state;

[0031] Step S2, placing the syringe 1 at a designated position, and determining the needle insertion depth by means of the height setting frame 9;

[0032] Step S3, pressing the release rod 3 close to the side of the first spring 7, so that the limiting block 11 releases the limiting of the first limiting groove 12, and the impact block 2 drives the thin-sheet microneedle 10 to release the needle insertion process under the elasticity of the second spring 8, and the pin 4 abuts against the top of the inner wall of the movable groove 14 of the impact block 2 to stop the impact block 2 from moving. At the same time, under the elastic force of the first spring 7, the limiting block 11 at the other end of the release rod 3 is clamped and fixed with the second limiting groove 13;

[0033] Step S4, unscrew the end cap 5 threadedly connected to the syringe 1 to replace the second spring 8 with a different elastic coefficient to adjust the impact force.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-stage needle inserter structure for quick assembly, comprising a needle barrel (1), characterized in that: The syringe (1) is slidably connected to an impact block (2), and the top of the syringe (1) is threadedly connected to an end cover (5), the bottom of the end cover (5) is fixedly connected to a second spring (8), and the other end of the second spring (8) is fixedly connected to the top of the impact block (2), the bottom of the impact block (2) is fixedly connected to a thin sheet microneedle (10), and one side of the syringe (1) is fixedly connected to a pin (4), and one side of the impact block (2) is provided with an active groove (14) that matches the shape of the pin (4) in the vertical direction, and the syringe (1) is away from the pin. A release rod (3) distributed in the vertical direction is arranged on one side of the nail (4); the middle position of the release rod (3) is rotatably connected to one side of the syringe (1) through a pin shaft (6); and the top end of the release rod (3) is elastically connected to one end of the syringe (1) through a first spring (7); the end of the release rod (3) away from the first spring (7) and close to the side of the syringe (1) is fixedly connected to a limiting block (11); and the impact block (2) is provided with a first limiting groove (12) and a second limiting groove (13) in the vertical direction, which are engaged with the limiting block (11).

2. A two-stage quick-assembly needle inserter structure according to claim 1, characterized in that: The thin sheet microneedle (10) is fixed to the bottom end of the impact block (2) by adhesive bonding.

3. A two-stage quick-assembly needle inserter structure according to claim 2, characterized in that: A strip groove which matches the shape of the release rod (3) and is connected to the impact block (2) is formed on one side of the needle cylinder (1).

4. A two-stage quick-assembly needle inserter structure according to claim 3, characterized in that: A fixed height frame (9) is fixedly penetrated in a horizontal direction on one side of the syringe (1) close to the thin-sheet microneedle (10).

5. A two-stage quick-assembly needle inserter structure according to claim 4, characterized in that: A sliding groove is provided at the center of the bottom end of the needle cylinder (1) and is in sliding contact with the outer side of the impact block (2).

6. A quick-assembly two-stage needle inserter structure according to claim 5, characterized in that: The top end of the impact block (2) is provided with a second limiting groove (13), and the bottom end of the second spring (8) is sleeved and fixed on the outside of the second limiting groove (13) at the top end of the impact block (2).

7. A method for using a quick-assembly two-stage needle inserter structure according to any one of claims 1 to 6, characterized in that: The steps include: Step S1, fixing the thin-sheet microneedle (10) to the bottom end of the impact block (2) by adhesive bonding, and then pushing the impact block (2) upward in the vertical direction, so that the second limiting groove (13) on one side of the impact block (2) is clamped and fixed with the limiting block (11) at the bottom end of the release rod (3), and at the same time, the second spring (8) is in a compressed state; Step S2, placing the syringe (1) at a designated location and determining the needle insertion depth by means of a height setting frame (9); Step S3, pressing the release rod (3) close to the side of the first spring (7), so that the limiting block (11) releases the limiting of the first limiting groove (12), and the impact block (2) drives the thin-sheet microneedle (10) to release the needle insertion process under the elasticity of the second spring (8), and the pin (4) abuts against the top of the inner wall of the movable groove (14) of the impact block (2) to stop the impact block (2), and at the same time, under the elastic force of the first spring (7), the limiting block (11) at the other end of the release rod (3) is clamped and fixed with the second limiting groove (13); Step S4, unscrewing the end cap (5) threadedly connected to the syringe (1) to replace the second spring (8) with a different elastic coefficient to adjust the impact force.

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