CN203736632U - Electric needle-free injection propulsion device - Google Patents

Abstract

The utility model discloses an electric needle-free injection propulsion device. The electric needle-free injection propulsion device comprises a mechanical body and an electronic control device. The mechanical body comprises a propulsion unit, a transmission mechanism and an outer sleeve. In the process of needle-free injection, a start switch is pressed down, a motor is driven to rotate once a circuit is connected, so that a gear set is driven to run, a push rod is then driven to move to the right through incomplete gear and rack transmission, a spring is compressed, and the pressurizing process is conducted. When an incomplete gear continues to rotate till being meshed with a remaining pair of teeth of a rack, the pressure of the spring reaches the largest, a single-chip microcomputer controls the circuit to stop running of the motor, so that the rack does not move any more, and the pressurizing process is ended. When a launching button is pressed down at the moment, the motor drives the push rod to continue to move to the right, the rack is disengaged from the incomplete gear so as not to be meshed with the incomplete gear, and the push rod is triggered to complete the launching action. The electric needle-free injection propulsion device is greatly simplified in mechanism, provided with fewer components, convenient to machine, low in cost, easy to operate, adjustable and high in automation degree, safety and reliability.

Description

A kind of electrodynamic type Needleless injection propulsion plant

Technical field

This utility model relates to a kind of electrodynamic type Needleless injection device, belongs to medical product field.

Background technology

1. Needleless injection is a kind of new way of percutaneous dosing, compare with needled conventionally drug injection, needleless injector can inject voluntarily, painless when easy to operate, safety, injection, injection efficiency is high and injection after the high feature of drug absorption rate, the application of Needleless injection technology aspect clinical treatment and family health care is day by day extensive.

2. traditional needleless injector is mainly mechanical type needleless injector, and it comprises propulsion plant and the pressue device of syringe;

3. traditional mechanical formula needleless injector implements more complicatedly, and propulsion plant needs often from pressue device, to take off, and workload is larger, convenient not;

4. traditional mechanical formula needleless injector automaticity is not high enough; course of injection needs the cycle longer each time, and need to especially note certain safety measure, to prevent wrong injection; to having relatively high expectations of operator, this is unfavorable for the frequent injector's of needs (as diabetics) use;

5. traditional mechanical formula needleless injector comprises two major parts, and pressue device is heavier, carries inconvenience.

Utility model content

For above-mentioned existing situation, this utility model is intended to improve for the implementation method of mechanical type needleless injector, and the convenience, the safety and reliability that to improve needleless injector, use, make injection process automatization more.

This utility model is achieved through the following technical solutions:

A kind of electrodynamic type Needleless injection propulsion plant, comprise basic machine and electric control gear, described basic machine comprises propulsion plant, drive mechanism and overcoat, described propulsion plant comprises sleeve, the push rod that can move back and forth in barrel bore, is enclosed within the Compress Spring on push rod, described barrel forward end is provided with the female thread being connected with ampoule bottle, rear end is connected with overcoat by external screw thread, and described putting back-end has tooth bar;

Described drive mechanism comprises motor, by horizontally disposed motor mounting plate, is fixed in overcoat, and the output shaft of described motor is connected with small conical gear; Jackshaft, is horizontally set in overcoat, is provided with coaxially the large conical gear being meshed with small conical gear, the partial gear being meshed with the tooth bar of putting back-end on described jackshaft;

Startup button and transmitting button that described electric control gear comprises single-chip microcomputer and is connected with this single chip circuit, described single-deck machine is for controlling conduction time and the interval of motor, and described startup button and transmitting button are respectively used to starter motor and start injection.

Described drive mechanism comprises one group of taper gear pair and a pair of partial gear tooth bar pair, by conical gear, realize the deceleration of motor and increase motor speed moment of torsion, thereby then the rectilinear motion that rotatablely moving of motor is converted into push rod of the transmission by a pair of partial gear tooth bar realize the impetus of propulsion plant.

When pressing startup button, energising duration and the interval of by the control of single-chip microcomputer, realizing circuit, thereby the control gear anglec of rotation, realize promotion the assurance of push rod and block last gear teeth of partial gear.When pressing transmitting button, partial gear continues to turn over an angle and departs from engagement with tooth bar, realizes launching of push rod.

This utility model compared with prior art, is simplified in a large number in mechanism, and parts are few, easy to process, and cost is low, not only simple to operate, adjustable, and automaticity, safety and reliability increase greatly.

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model push rod in original state.

Fig. 2 is A-A place cross-sectional schematic in Fig. 1.

Fig. 3 is the structural representation of this utility model spring in compressive state.

Shown in figure, be: 1-sleeve; 2-push rod; 3-Compress Spring; 4-external screw thread; 5-overcoat; 6-partial gear; 7-motor mounting plate; 8-motor; 9-female thread; 10-small conical gear; 11-jackshaft; 12-large conical gear.

The specific embodiment

Below in conjunction with drawings and Examples, this utility model is described in further detail.

Fig. 1 and Fig. 2 are respectively structural representation and the spring structural representation in compressive state of push rod in original state.

A kind of electrodynamic type Needleless injection propulsion plant, comprise basic machine and electric control gear, described basic machine comprises propulsion plant, drive mechanism and overcoat 5, described propulsion plant comprises sleeve 1, the push rod 2 that can move back and forth in sleeve 1 inner chamber, is enclosed within the Compress Spring 3 on push rod 2, described sleeve 1 front end is provided with the female thread 9 being connected with ampoule bottle, rear end is connected with overcoat 5 by external screw thread 4, and described push rod 2 rear ends have tooth bar;

As shown in Figure 2, described drive mechanism comprises motor 8, by horizontally disposed motor mounting plate 7, is fixed in overcoat 5, and the output shaft of described motor 8 is connected with small conical gear 10; Jackshaft 11, is horizontally set in overcoat 5, is provided with coaxially the large conical gear 12 being meshed with small conical gear 10, the partial gear 6 being meshed with the tooth bar of push rod 2 rear ends on described jackshaft 11;

Startup button and transmitting button that described electric control gear comprises single-chip microcomputer and is connected with this single chip circuit, described single-deck machine is for controlling conduction time and the interval of motor 8, and described startup button and transmitting button are respectively used to starter motor 8 and start injection.

During operation, first by ampoule bottle and sleeve 1 thread connection.Press startup button, power on circuitry, motor 8 drives the rotation of small conical gear 10 and large bevel gear 12, drive partial gear 6 to rotate simultaneously, and then driving tooth bar to promote push rod moving linearly to the right by partial gear 6, Compress Spring 3 is compressed, in energy storage state.When partial gear 6 and tooth bar only have gear teeth to keep engagement, motor 8 stops, and push rod 2 is in state to be triggered.

At this moment press startup button, partial gear 6 continues to clockwise rotate again, and partial gear 6 departs from engagement with tooth bar, and push rod 2 launches left under the effect of Compress Spring 3, completes injection.

Emission process is extremely short action time, and after having injected, single chip machine controlling circuit automatically switches to off-position, and whole device enters guard mode, until start button is pressed in powder charge next time after completing, can work on.

Owing to there being Single-chip Controlling, at certain, once press after start button, if do not press firing button in the certain hour of being separated by, single chip machine controlling circuit automatically switches to off-position, whole device enters guard mode, prevents that operation mistake from causing bad accident.

This utility model realizes thrust unit in mechanism and pressue device unites two into one, more simply portable, adopts circuit to control automatic degree is increased greatly, and convenient operator's use, has also more guaranteed safety.

Above-described embodiment of the present utility model is only for this utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.All any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in the protection domain of this utility model claim.

Claims (1)

1. an electrodynamic type Needleless injection propulsion plant, it is characterized in that: comprise basic machine and electric control gear, described basic machine comprises propulsion plant, drive mechanism and overcoat (5), described propulsion plant comprises sleeve (1), the push rod (2) that can move back and forth in sleeve (1) inner chamber, is enclosed within the Compress Spring (3) on push rod (2), described sleeve (1) front end is provided with the female thread (9) being connected with ampoule bottle, rear end is connected with overcoat (5) by external screw thread (4), and described push rod (2) rear end has tooth bar;

Described drive mechanism comprises motor (8), by horizontally disposed motor mounting plate (7), is fixed in overcoat (5), and the output shaft of described motor (8) is connected with small conical gear (10);

Jackshaft (11), be horizontally set in overcoat (5), on described jackshaft (11), be provided with coaxially the large conical gear (12) being meshed with small conical gear (10), the partial gear (6) being meshed with the tooth bar of push rod (2) rear end;

Startup button and transmitting button that described electric control gear comprises single-chip microcomputer and is connected with this single chip circuit, described single-deck machine is used for controlling conduction time and the interval of motor (8), and described startup button and transmitting button are respectively used to starter motor (8) and start injection.