Driving mechanism and injector

Abstract

The utility model relates to the technical field of needleless injectors, in particular to a driving mechanism and an injector, which comprise a mounting component, and the mounting component comprises a mounting block; the driving assembly comprises a push rod arranged on the mounting block in a sliding manner, a reset piece with one end fixed and the other end arranged on the push rod, and a driving part connected with the push rod; the driving part controls the push rod to move away from the initial position, and the reset piece controls the push rod to return to the initial position. According to the driving mechanism and the injector, the push rod reciprocates in the liquid storage tube to complete extraction and discharge of liquid medicine, and after the driving mechanism controls the push rod to extract quantitative liquid medicine every time, the elastic piece controls the push rod to return to the initial position to pressurize and discharge the liquid medicine to complete needleless injection.

Description

Technical Field

[0001] This utility model relates to the technical field of needleless injectors, and in particular to a drive mechanism and injector. Background Technology

[0002] Needle-free injectors mainly utilize the principle of pressure jet. The internal pressure device generates pressure, which pushes the liquid in the tube through micropores to form an extremely fine liquid column. This allows the liquid to penetrate the epidermis and reach the subcutaneous layer instantly. The liquid is then absorbed in a diffused manner with a diameter of 3-5 cm under the skin.

[0003] The needle-free injector includes a drug reservoir. The drug reservoir pushes out the internal drug solution by the movement of the piston to complete the injection. The reciprocating movement of the piston completes the extraction and discharge of the drug solution inside the reservoir. The distance of the piston's extraction movement is not fixed, which affects the amount of drug solution extracted. Utility Model Content

[0004] In view of the problems existing in the above-mentioned driving mechanism and syringe, this utility model is proposed.

[0005] Therefore, one of the objectives of this invention is to provide a drive mechanism that controls the distance the piston moves.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a driving mechanism, comprising,

[0007] Installation components, including installation blocks; and,

[0008] The drive assembly includes a push rod slidably disposed on the mounting block, a reset member with one end fixed and the other end disposed on the push rod, and a drive part connected to the push rod;

[0009] The drive unit controls the push rod to move away from the initial position, and the reset unit controls the push rod to return to the initial position.

[0010] In a preferred embodiment of the drive mechanism described in this utility model, the reset element can be made of a spring or a metal spring sheet;

[0011] One end of the reset component is fixed to the mounting block, and the other end is mounted on the push rod.

[0012] In a preferred embodiment of the drive mechanism of this utility model, the drive unit includes a fixedly mounted drive motor, a drive disk disposed at the end of the drive motor, and a control component disposed on the drive disk.

[0013] The push rod end is provided with a locking block, which is slidably connected to the control component.

[0014] In a preferred embodiment of the drive mechanism of this utility model, the control component includes an initial surface disposed on the end face of the drive disk and a climbing ring connected end to end of the initial surface;

[0015] The climbing ring gradually increases in height from one end to the other.

[0016] The snap-fit ​​block is slidably connected to the climbing ring.

[0017] In a preferred embodiment of the drive mechanism of this utility model, the control component includes an initial surface disposed on the side of the drive disk and an extrusion block connected to the initial surface.

[0018] The snap-fit ​​block is slidably connected to the compression block.

[0019] As a preferred embodiment of the drive mechanism of this utility model, the control component includes a climbing groove and a connecting groove disposed on the side of the drive disk;

[0020] The climbing groove is spiral-shaped, and the connecting groove connects the two ends of the climbing groove.

[0021] The push rod is equipped with a limiting post.

[0022] The limiting post is slidably inserted into the climbing groove.

[0023] In a preferred embodiment of the drive mechanism of this utility model, the drive unit includes a fixedly mounted drive motor and a missing gear disposed at the end of the drive motor.

[0024] The push rod is provided with protruding teeth;

[0025] The missing gear engages with the convex tooth.

[0026] The beneficial effects of this drive mechanism are: the elastic element maintains the initial position of the push rod when it is stationary, the drive unit controls the movement distance of the push rod, and after the drive unit separates from the push rod, the elastic element drives the push rod back to the initial position. The drive unit can ensure that the movement distance of the push rod is the same each time.

[0027] Another objective of this invention is to provide a syringe that controls the amount of liquid medicine drawn by the piston.

[0028] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a syringe, including a driving mechanism, and further comprising;

[0029] A liquid storage assembly, comprising a liquid storage tube, an inlet pipe disposed on the liquid storage tube, and a nozzle disposed at the end of the liquid storage tube;

[0030] The mounting assembly also includes a connector, one end of which is connected to the liquid storage tube and the other end of which is connected to the mounting block;

[0031] The end of the push rod is slidably inserted into the liquid storage tube.

[0032] In a preferred embodiment of the syringe described in this utility model, both the inlet tube and the nozzle are equipped with a one-way valve.

[0033] In a preferred embodiment of the syringe described in this utility model, the mounting assembly includes a grip shell;

[0034] The liquid storage assembly and the drive assembly are installed inside the grip shell.

[0035] The beneficial effects of this utility model are: the push rod can complete the extraction and discharge of the drug liquid by reciprocating in the liquid storage tube. The drive mechanism controls the push rod to extract a certain amount of drug liquid each time, and the elastic element controls the push rod to return to the initial position while pressurizing and discharging the drug liquid to complete the needle-free injection. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the overall structure of Embodiment 1 is shown;

[0038] Figure 2 A schematic diagram of the control components in Embodiment 1 is shown;

[0039] Figure 3 A schematic diagram of the overall structure of Embodiment 2 is shown;

[0040] Figure 4 A schematic diagram of the control components in Embodiment 2 is shown;

[0041] Figure 5 A schematic diagram of the overall structure of Embodiment 3 is shown;

[0042] Figure 6 A schematic diagram of the overall structure of Embodiment 4 is shown;

[0043] Figure 7 A schematic diagram of the overall structure of Embodiment 5 is shown;

[0044] Figure 8 A schematic diagram of the grip shell of Embodiment 5 is shown. Detailed Implementation

[0045] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0046] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0047] Example 1, referring to Figure 1 and Figure 2 The first embodiment of this utility model provides a driving mechanism, including a mounting component 100 and a driving component 200.

[0048] The mounting component 100 includes a mounting block 101;

[0049] The drive assembly 200 includes a push rod 201 slidably disposed on the mounting block 101, a reset member 202 fixed at one end and disposed on the push rod 201 at the other end, and a drive part 203 connected to the push rod 201;

[0050] The drive unit 203 controls the push rod 201 to move away from the initial position, and the reset unit 202 controls the push rod 201 to return to the initial position.

[0051] The initial position is when the push rod 201 is slidably inserted into the mounting block 101 and is not subjected to external force, the position where the reset member 202 and the push rod 201 are in a stationary state; when the drive unit 203 controls the push rod 201 to move away from the initial position, the reset member 202 will deform, and when the drive unit 203 no longer controls the push rod 201, the reset member 202 controls the push rod 201 to return to the initial position. The position of the push rod 201 can be cyclically moved by the control of the drive unit 203.

[0052] Furthermore, the reset member 202 can be made of a spring or a metal spring sheet. One end of the reset member 202 is fixedly connected to the push rod 201, and the other end can be fixed to the mounting block 101 or fixed to an external device. If there is a protective shell outside the mounting block 101, one end of the reset member 202 can be fixed to the protective shell. Preferably, one end of the reset member 202 is fixed to the mounting block 101.

[0053] The drive unit 203 includes a fixed drive motor 203a, a drive disk 203b disposed at the end of the drive motor 203a, and a control component 203c disposed on the drive disk 203b; wherein the drive motor 203a can be fixed in an external device or fixed to the mounting block 101, preferably fixed to the mounting block 101.

[0054] The push rod 201 has a locking block 201a at its end, and the locking block 201a is slidably connected to the control component 203c.

[0055] Furthermore, the control component 203c includes an initial surface 203c-1 disposed on the end face of the drive disk 203b, and a climbing ring 203c-2 connected to the initial surface 203c-1 at both ends; wherein the initial surface 203c-1 is the surface of the drive disk 203b, and the climbing ring 203c-2 is arc-shaped, with its two ends connected to the two ends of the initial surface 203c-1 respectively.

[0056] The climbing ring 203c-2 gradually increases in height from one end to the other, and the junction between the bottom end of the climbing ring 203c-2 and the initial surface 203c-1 is greater than 120°, which facilitates a smooth transition. The locking block 201a is slidably connected to the climbing ring 203c-2, wherein the locking ring slides along the initial surface 203c-1 from the bottom end to the top end of the climbing ring 203c-2. When the locking ring leaves the top end of the climbing ring 203c-2, it will coincide with the height projection of the initial surface 203c-1. When the locking ring contacts the initial surface 203c-1, the push rod 201 is in the initial position, wherein the displacement range of the locking ring is fixed, thereby ensuring that the push rod 201 moves a certain maximum distance each time.

[0057] During use, the drive motor 203a controls the drive disk 203b to rotate, causing the drive disk 203b and the climbing ring 203c-2 to rotate relative to the locking ring. That is, the locking ring will rotate along the surfaces of the initial surface 203c-1 and the climbing ring 203c-2. When the locking ring moves from the initial surface 203c-1 to the high end of the climbing ring 203c-2, the push rod 201 will leave the initial position and cause the reset member 202 to deform. When the locking ring moves to the high end of the climbing ring 203c-2, the push rod 201 will return to the initial position under the elastic force of the reset member 202. At the same time, the locking ring returns to contact with the initial surface 203c-1. As the drive disk 203b continues to rotate, the push rod 201 will repeatedly move from leaving the initial position to returning to the initial position.

[0058] Example 2, refer to Figure 3 and Figure 4This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the control component 203c includes an initial surface 203c-1 disposed on the side of the drive disk 203b, and an extrusion block 203c-3 connected to the initial surface 203c-1. The extrusion block 203c-3 is arc-shaped on one side, and the junction with the initial surface 203c-1 is greater than 120°, which facilitates a smooth transition.

[0059] The snap-fit ​​block 201a is slidably connected to the compression block 203c-3. When the snap-fit ​​block 201a contacts the initial surface 203c-1, the push rod 201 is in the initial position. When the snap-fit ​​block 201a slides from the initial surface 203c-1 toward the surface of the compression block 203c-3, it will drive the push rod 201 to move and cause the reset member 202 to deform. When the snap-fit ​​block 201a leaves the top of the arc-shaped surface of the compression block 203c-3, the height projection of the snap-fit ​​block 201a and the initial surface 203c-1 coincides.

[0060] The remaining structure is the same as that in Example 1.

[0061] During use, the drive motor 203a controls the drive disk 203b to rotate, causing the drive disk 203b and the extrusion block 203c-3 to rotate relative to the locking ring. That is, the locking ring will rotate along the surfaces of the initial surface 203c-1 and the climbing ring 203c-2. When the locking ring moves from the initial surface 203c-1 to the arc surface of the extrusion block 203c-3, the push rod 201 will leave the initial position and cause the reset member 202 to deform. When the locking ring moves away from the top of the arc surface of the extrusion block 203c-3, the push rod 201 will return to the initial position under the elastic force of the reset member 202. At the same time, the locking ring returns to contact with the initial surface 203c-1. As the drive disk 203b continues to rotate, the push rod 201 will repeatedly move from leaving the initial position to returning to the initial position.

[0062] Example 3, referring to Figure 5 This is the third embodiment of the present utility model. The difference between this embodiment and the first embodiment is that the control component 203c includes a climbing groove 203c-4 and a connecting groove 203c-5 disposed on the side of the drive disk 203b.

[0063] The climbing groove 203c-4 is spiral-shaped, and the connecting groove 203c-5 connects the two ends of the climbing groove 203c-4. The climbing groove 203c-4 spirals only once, and the height projections of the two ends coincide. The two ends of the climbing groove 203c-4 are the initial end and the high end, respectively.

[0064] The push rod 201 is equipped with a limiting post 201b, which is slidably inserted into the climbing groove 203c-4.

[0065] When the limiting post 201b is located at the initial end of the climbing groove 203c-4, the push rod 201 is in the initial position. When the limiting post 201b slides to the high end in the climbing groove 203c-4, the push rod 201 will move away from the initial position and will cause the reset component 202 to deform.

[0066] The remaining structure is the same as that in Example 1.

[0067] During use, the drive motor 203a controls the drive disk 203b to rotate, causing displacement of the climbing groove 203c-4 and the limiting post 201b. That is, the limiting post 201b moves along the climbing groove 203c-4. When the limiting post 201b moves from the lower end to the upper end of the climbing groove 203c-4, the push rod 201 leaves the initial position and causes the reset component 202 to deform. When the limiting post 201b leaves the upper end of the climbing groove 203c-4 and enters the connecting groove 203c-5, the push rod 201 returns to the initial position under the elastic force of the reset component 202. At the same time, the limiting post 201b slides along the connecting groove 203c-5 to the lower end of the climbing groove 203c-4. As the drive disk 203b continues to rotate, the push rod 201 moves repeatedly from leaving the initial position to returning to the initial position.

[0068] Example 4, refer to Figure 6 This is the fourth embodiment of the present invention. The difference between this embodiment and the first embodiment is that the drive unit 203 includes a fixedly installed drive motor 203a and a missing gear 203d disposed at the end of the drive motor 203a; the push rod 201 is provided with a protruding tooth 201c; the missing gear 203d cooperates with the protruding tooth 201c.

[0069] The missing gear 203d is a disc with multiple teeth, and the remaining part is smooth. The toothed part meshes with the convex tooth 201c. When the teeth of the missing gear 203d separate from the convex tooth 201c, the push rod 201 is in the initial position. As the missing gear 203d rotates, the teeth of the missing gear 203d will mesh with and separate from the convex tooth 201c. During the process of meshing and separation, the push rod 201 will move away from the initial position and cause the reset member 202 to deform. Until the teeth of the missing gear 203d separate from the convex tooth 201c, the push rod 201 returns to the initial position under the elastic force of the reset member 202. The continuous rotation of the missing gear 203d will cause the push rod 201 to move repeatedly from leaving the initial position to returning to the initial position.

[0070] The remaining structure is the same as that in Example 1.

[0071] Example 5, refer to Figure 7 and Figure 8This is the fifth embodiment of the present invention, which provides a syringe. The device includes a drive mechanism and a liquid storage assembly 300.

[0072] The liquid storage assembly 300 includes a liquid storage pipe 301, an inlet pipe 302 disposed on the liquid storage pipe 301, and a nozzle 303 disposed at the end of the liquid storage pipe 301.

[0073] The mounting assembly 100 also includes a connector 102, one end of which is connected to the liquid storage tube 301 and the other end of which is connected to the mounting block 101. The end of the push rod 201 is slidably inserted into the liquid storage tube 301. The connector 102 is used to connect the liquid storage tube 301 and the mounting block 101. The connector 102 can be made into a tubular structure and sleeved on the outside of the push rod 201, or the connector 102 can be a protective shell, and the liquid storage tube 301 and the mounting block 101 can be fixed on the protective shell to achieve relative fixation.

[0074] Furthermore, both the inlet pipe 302 and the nozzle 303 are equipped with a one-way valve 304. The one-way valve 304 in the inlet pipe 302 allows the liquid medicine in the inlet pipe 302 to enter the storage pipe 301 in only one direction, while the one-way valve 304 in the nozzle 303 allows the liquid medicine in the storage pipe 301 to be discharged in only one direction.

[0075] During the repeated movement of the push rod 201 from leaving the initial position to returning to the initial position, it will repeatedly draw in and discharge the medicine in the reservoir tube 301. When the push rod 201 leaves the initial position, the medicine will be drawn in. At this time, the medicine in the inlet tube 302 will pass through the one-way valve 304 in the inlet tube 302 and enter the reservoir tube 301. When the push rod 201 returns to the initial position, the medicine in the reservoir tube 301 will pass through the one-way valve 304 in the nozzle 303 and be sprayed out to achieve subcutaneous injection. The elastic coefficient of the reset member 202 controls the spray pressure of the medicine.

[0076] Furthermore, the mounting assembly 100 also includes a grip shell 103, which is a protective housing; the liquid storage assembly 300 and the drive assembly 200 are installed inside the grip shell 103. The grip shell 103 is gun-shaped or 7-shaped, with a handle and a lateral aiming part. The grip shell 103 facilitates gripping and aiming, thereby enabling multiple rapid needle-free injections of the liquid during the repeated movement of the push rod 201 from leaving the initial position to returning to the initial position. The push rod 201 moves a fixed maximum distance each time, ensuring that the amount of liquid drawn is constant.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A driving mechanism, characterized in that: include, Installing component (100), including installation block (101); as well as, The drive assembly (200) includes a push rod (201) slidably disposed on the mounting block (101), a reset member (202) fixed at one end and disposed on the push rod (201) at the other end, and a drive part (203) connected to the push rod (201). The drive unit (203) controls the push rod (201) to move away from the initial position, and the reset member (202) controls the push rod (201) to return to the initial position.

2. The driving mechanism according to claim 1, characterized in that: One end of the reset component (202) is fixed on the mounting block (101), and the other end is mounted on the push rod (201).

3. The driving mechanism according to claim 1 or 2, characterized in that: The drive unit (203) includes a fixed drive motor (203a), a drive disk (203b) disposed at the end of the drive motor (203a), and a control component (203c) disposed on the drive disk (203b). The push rod (201) has a locking block (201a) at its end, and the locking block (201a) is slidably connected to the control component (203c).

4. The driving mechanism according to claim 3, characterized in that: The control unit (203c) includes an initial surface (203c-1) disposed on the end face of the drive disk (203b), and a climbing ring (203c-2) connected end to end of the initial surface (203c-1). The climbing ring (203c-2) gradually increases in height from one end to the other. The snap-fit ​​block (201a) is slidably connected to the climbing ring (203c-2).

5. The driving mechanism according to claim 3, characterized in that: The control element (203c) includes an initial surface (203c-1) disposed on the side of the drive disk (203b) and an extrusion block (203c-3) connected to the initial surface (203c-1). The snap-fit ​​block (201a) is slidably connected to the compression block (203c-3).

6. The driving mechanism according to claim 3, characterized in that: The control component (203c) includes a climbing groove (203c-4) and a connecting groove (203c-5) disposed on the side of the drive disk (203b). The climbing groove (203c-4) is spiral-shaped, and the connecting groove (203c-5) connects the two ends of the climbing groove (203c-4). The push rod (201) is provided with a limiting post (201b). The limiting post (201b) is slidably inserted into the climbing groove (203c-4).

7. The driving mechanism according to claim 1 or 2, characterized in that: The drive unit (203) includes a fixed drive motor (203a) and a missing gear (203d) disposed at the end of the drive motor (203a). The push rod (201) is provided with protruding teeth (201c); The missing gear (203d) engages with the protruding tooth (201c).

8. A syringe, characterized in that: Including the drive mechanism as described in claim 7, and further comprising: Liquid storage assembly (300) includes a liquid storage pipe (301), an inlet pipe (302) disposed on the liquid storage pipe (301), and a nozzle (303) disposed at the end of the liquid storage pipe (301). The mounting assembly (100) further includes a connector (102), one end of which is connected to the liquid storage tube (301) and the other end of which is connected to the mounting block (101); The end of the push rod (201) is slidably inserted into the liquid storage tube (301).

9. The syringe according to claim 8, characterized in that: Both the inlet pipe (302) and the nozzle (303) are equipped with a one-way valve (304).

10. The syringe according to claim 8 or 9, characterized in that: The mounting assembly (100) includes a grip shell (103); The liquid storage assembly (300) and the drive assembly (200) are installed inside the grip shell (103).

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