CN103816586B - A kind of mechanical type Needleless injection propulsion plant - Google Patents

Abstract

The patent of the present invention discloses a mechanical needle-free injection propulsion device, which includes a piston-type impact head arranged in the cavity of the main body of the hollow cylindrical propulsion device, a first compression spring for pushing the impact head to move, an adjustment mechanism, a self-locking mechanism and The control button, the adjustment mechanism includes a convex inner hexagonal bolt, the inner hexagonal bolt is matched with the first thread located in the inner cavity of the main body end of the propulsion device, the first compression spring is located between the impact head and the inner hexagonal bolt, The compression force of the first compression spring is adjusted by adjusting the hexagon socket bolt. The front end of the main body of the propulsion device is provided with a second internal thread for threaded connection with the ampoule bottle, and the self-locking mechanism includes a sleeve, a torsion spring, a second compression spring movably sleeved on the main body of the propulsion device and a snap ring. The invention greatly simplifies the structure of the propulsion device, is convenient to operate, ensures orderly and safe operation process of the needle-free injector, and is especially suitable for self-operation by patients.

Description

A mechanical needle-free injection propulsion device

technical field

The invention relates to a needle-free injection propelling device, which is used for needle-free injection of human body or animals, and belongs to the field of medical machinery products.

Background technique

Needle-free injection administration is to inject a certain dose of fluid subcutaneously into animals or human bodies by using instantaneously generated high-pressure and high-speed medicinal liquid, and belongs to the field of injection devices. Needle-free injection is a new way of transdermal drug delivery. Compared with traditional acupuncture drug injection, needle-free syringe can be injected by itself, easy to operate, safe, painless during injection, high injection efficiency and drug absorption rate after injection. High characteristics, the application of needle-free injection technology in clinical medicine and family health care is becoming more and more extensive.

A mechanical needle-free injector generally includes an ampoule, a propulsion device, and a pressurization device. Due to the relatively high safety requirements for the operation of needle-free syringe propellers, the mechanical needle-free syringe propellers currently on the market have a relatively complicated structure and cumbersome operation process, which is particularly inconvenient for diabetic elderly who often use needle-free syringes. Based on the above reasons, the present invention has the characteristics of simple operation, safety and reliability.

Contents of the invention

In view of the above existing situation, the content of the present invention mainly includes the main body of the propulsion device, the adjustment mechanism and the self-locking mechanism, so as to improve the safety and operational reliability of the propulsion device.

The present invention is realized through the following technical solutions:

A mechanical needle-free injection propulsion device, comprising a piston-type impact head arranged in a cavity of a hollow cylindrical propulsion device main body, a first compression spring for pushing the impact head to move, an adjustment mechanism, a self-locking mechanism, and a control button. The adjustment mechanism includes a convex inner hexagonal bolt, the inner hexagonal bolt is matched with the first thread located in the inner cavity at the end of the main body of the propulsion device, the first compression spring is located between the impact head and the inner hexagonal bolt, by adjusting the inner hexagonal bolt To adjust the compression force of the first compression spring, the front end of the main body of the propulsion device is provided with a second internal thread for threaded connection with the ampoule bottle. Two compression springs and snap rings, the sleeve is in interference fit with the outer wall of the front end of the main body of the propulsion device for positioning the left end of the second compression spring, the right end of the second compression spring is in contact with the snap ring, and the control button is passed through a pin It is hinged with the main body of the propulsion device, and the front end of the control button is provided with a slot that matches the snap ring, and the pin is equipped with a torsion spring that keeps the control button always clockwise.

The sleeve is an interference fit with the front end of the main body of the propulsion device, and is used for positioning the second compression spring in the self-locking mechanism. The other end of the second compression spring is in contact with the snap ring and is in a compressed state.

The control button is located in the middle of the main body of the propulsion device and connected with the main body through a pin, and a torsion spring is housed in the pin. There is a card slot on the front of the control button to ensure that the control button always maintains a clockwise spring torsion.

Compared with the prior art, the present invention greatly simplifies the mechanism, has fewer parts, is convenient to process, and has low cost. It is not only simple and adjustable in operation, but also has greatly increased safety and reliability.

Description of drawings

Fig. 1 is the structural representation that spring in the main body of the present invention is compressed state;

Fig. 2 is a structural schematic diagram of the inner spring of the main body of the present invention after being impacted.

As shown in the figure: 1-sleeve; 2-second compression spring; 3-card slot; 4-control button; 5-torsion spring; 6-pin; 7-impact head; 8-first compression spring; 9 - the first internal thread; 10 - the hexagon socket bolt; 11 - the second internal thread; 12 - the snap ring; 13 - the main body of the propulsion device.

detailed description

The purpose of the invention of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following embodiments.

As shown in Figure 1, a mechanical needle-free injection propulsion device includes a piston-type impact head 7 arranged in the cavity of a hollow cylindrical propulsion device main body 13, a first compression spring 8 that pushes the impact head 7 to move, and an adjustment mechanism . Self-locking mechanism and control buttons, the adjustment mechanism includes a convex inner hexagonal bolt 10, the inner hexagonal bolt 10 is matched with the first thread 9 located in the end cavity of the propulsion device main body 13, the first compression spring 8 Located between the impact head 7 and the inner hexagon bolt 10, the compression force of the first compression spring 8 is adjusted by adjusting the inner hexagon bolt 10, and the front end of the propulsion device main body 13 is provided with a second internal thread 11 for threaded connection with the ampoule bottle, so The self-locking mechanism includes a sleeve 1, a torsion spring 5, a second compression spring 2 and a snap ring 12 movably sleeved on the main body 13 of the propulsion device, and the sleeve 1 is in interference fit with the outer wall of the front end of the main body 13 of the propulsion device. Positioning the left end of the second compression spring 2, the right end of the second compression spring 2 is in contact with the snap ring 12, the control button 4 is hinged with the propulsion device main body 13 through the pin 6, and the front end of the control button 4 is provided with a The snap ring 12 fits into the slot 3, and the pin 6 is equipped with a torsion spring 5 that keeps the control button 4 clockwise torsion.

When the propulsion device is pressurized by the pressurizing mechanism, the first compression spring 8 in the propulsion device main body 13 is compressed, and the impact head 7 moves to the right. When the impact head 7 moves to the position shown in FIG. Under the action of the torsion spring 5 , a clockwise torsion force is generated, and the impact head 7 is locked in a certain position (as shown in FIG. 1 ), and the first compression spring 8 is in a compressed state. At the same time snap ring 12 moves to the right due to the effect of the second compression spring 2, and is stuck below the control button 4. At this time, the control button 4 will not be able to press down and control, and the mechanism is in a self-locking state.

Before operation, the ampoule bottle is connected with the main body 13 of the propulsion device through the second internal thread 11 . When performing an injection operation, first push the clasp 12 to the left by overcoming the pressure of the second compression spring 2 through external force (manpower) and make it be located in the slot 3 of the control button 4, and then press the control button 4 to make the control button 4 Turn the pin 6 counterclockwise at a certain angle, the right end of the control button 4 is lifted, and the restriction on the impact head 7 is canceled. At this time, the impact head 7 is pushed by the first compression spring 8 to impact the ampoule bottle to the right The compressed medicine is injected to the injection site, as shown in Figure 2.

When it is necessary to adjust the injection pressure or speed, it can be adjusted through the adjustment mechanism to adjust the front and rear positions of the hexagon socket bolt 10, so as to change the pressure of the first compression spring 8, thereby realizing the purpose of adjusting the size of the impact force.

The second compression spring 2 of the self-locking mechanism is positioned by the sleeve 1, and the sleeve is an interference fit with the main body of the propulsion device. Only when the snap ring 12 is located in the slot 3 of the control button, it is possible to press the control button to realize triggering.

The invention greatly simplifies the mechanism, not only the operation is simple and adjustable, but also the safety and reliability are greatly increased. The injection operation can be completed only when the "push, block, and press" is completed.

The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (1)

1. A mechanical needle-free injection propulsion device, comprising a piston-type impact head (7) disposed in the cavity of a hollow cylindrical propulsion device main body (13), a first compression spring (8) that pushes the impact head (7) to move ), an adjusting mechanism, a self-locking mechanism and a control button (4), characterized in that: The adjustment mechanism includes a convex inner hexagonal bolt (10), the said inner hexagonal bolt (10) is matched with the first screw thread (9) located in the end cavity of the propulsion device main body (13), and the first compression spring (8 ) is located between the impact head (7) and the hexagon socket bolt (10), the compression force of the first compression spring (8) is adjusted by adjusting the socket bolt (10), and the front end of the propulsion device main body (13) is provided with a The second internal thread (11) of the bottle threaded connection, the self-locking mechanism includes a sleeve (1), a torsion spring (5), a second compression spring (2) that is movably sleeved on the main body (13) of the propulsion device and a clip ring (12), the sleeve (1) is interference fit with the front end outer wall of the propulsion device main body (13), and is used to locate the left end of the second compression spring (2), and the right end of the second compression spring (2) is in contact with the The snap ring (12) contacts, the control button (4) is hinged with the main body (13) of the propulsion device through the pin (6), and the front end of the control button (4) has a card slot that matches the snap ring (12) (3), the pin (6) is equipped with a torsion spring (5) that keeps the control button (4) clockwise torque all the time.