CN219662512U - Miniature telescopic actuator and automatic injection device - Google Patents

Abstract

The miniature telescopic actuator comprises a driving unit and a propelling unit which are driven by electric power, wherein the propelling unit is of a telescopic structure formed by a plurality of sections of linear sleeves, and one end of each section of linear sleeve is provided with a propelling rod to form a piston structure capable of effectively compressing the internal pressure of the injection cylinder. The driving unit adopts a magnetic force device to generate magnetic force for pushing the multi-section linear sleeve to perform linear motion, or adopts a micro motor to drive the multi-section linear sleeve to perform linear motion. The multi-section linear sleeve can be designed as an outer sleeve or an inner sleeve, wherein the multi-section sleeve is screwed in an internal thread mode, and a clamping part is arranged on one of the multi-section sleeve.

Description

Miniature telescopic actuator and automatic injection device

[ field of technology ]

The present utility model relates to the technical field of telescopic brake, in particular to a miniature telescopic actuator and an automatic medical injection device adopting the miniature telescopic actuator.

[ background Art ]

Syringes are commonly used in medical institutions to administer medications, vaccines, or various medical use injection fluids to specific parts of a patient's body. The main structure of the common injector comprises a needle with a pore at the front end, a needle cylinder for containing injection and a pushing piston structure matched and sealed with the needle cylinder, and the injection in the needle cylinder can be hydraulically pushed to be extruded from the needle by manually pressing the pushing piston structure, so that the injection is effectively injected into subcutaneous tissues of a patient. With this construction, the plunger can be pulled out in the opposite direction, creating a vacuum in the barrel and drawing foreign matter from the needle into the barrel by means of the air pressure difference.

Furthermore, the prior art also develops an automatic injector, and a driving mechanism is installed at the rear end of the automatic injector, which is usually driven by a ratchet to drive a screw rod connected with a pushing piston to perform linear reciprocating displacement, so that the mode of manually pressing the pushing piston to form pressure in a syringe is replaced, and injection in the syringe can be more quickly and effectively sent out, however, the space required by the ratchet structure in the prior art is too large, so that the whole automatic injector cannot achieve the purpose of miniaturization in design.

An example of an autoinjector related to the prior art is shown in fig. 1, in which an autoinjector 10 is shown in fig. 1, a main body structure is provided with a housing 100, a syringe having a syringe barrel 107 and an injection outlet (such as a needle or a small hollow tube) 109 is provided in the housing 100, a ratchet 110 is provided at the other end of the syringe in the housing 100, a push rod 103 of an internal push piston is connected to the ratchet 110, the ratchet 110 is connected to a screw, and the push rod 103 of the push piston can be driven by the screw to perform linear reciprocating motion by using the design of the ratchet, so that the push piston is in the syringe barrel 107 and can be prevented from moving in the opposite direction.

In operation, the syringe 107 of the automatic injector is filled with injection, the rotary ratchet 110 rotates in one direction to drive the screw rod to rotate, so that the push rod 103 can be pushed to drive the push piston to linearly move towards the injection outlet 109, and pressure can be formed in the syringe 107 to send the injection from the injection outlet 109.

However, the prior art automatic injector using ratchet drive has a problem that the drive mechanism occupies too much space of the whole device, and there is a demand for miniaturization in a usual application operated by hand, so that the automatic injector is too large to cause a problem of inconvenient operation.

[ utility model ]

In order to achieve the purpose of miniaturization of an automatic injector, the utility model provides a miniature telescopic actuator and an automatic injection device, wherein the main component of the miniature telescopic actuator comprises a driving unit driven by electricity and a pushing unit, the driving unit is connected with the pushing unit, the pushing unit is of a telescopic structure formed by a plurality of sections of linear sleeves, and one end of each section of linear sleeve is provided with a pushing rod to form a piston structure capable of effectively compressing the internal pressure of the injection cylinder.

Further, the micro telescopic actuator further comprises a power supply unit for supplying power to the driving unit, and the driving unit can be electrically connected and controlled through the control unit.

Preferably, the driving unit comprises a magnetic device, and is electrically connected with a power supply unit of the miniature telescopic actuator, and an electromagnet is realized after the power supply unit is electrified to generate magnetic force for pushing the multi-section linear sleeve to perform linear motion.

Further, one end of the multi-section linear sleeve is provided with a magnetic component, and the magnetic component can be used for driving the multi-section linear sleeve to move linearly after the magnetic component interacts with magnetic force generated by the magnetic device.

Preferably, the driving unit may include a micro motor, and the micro motor is electrically connected to the power unit and configured to drive the multi-section linear sleeve to perform the linear motion.

Further, the surfaces of the sleeves in the multi-section linear sleeve are provided with threads, and after the sleeves are mutually sleeved, the micro motor drives the multi-section linear sleeve to linearly move.

According to an embodiment of an automatic injection device, the automatic injection device comprises a micro-telescopic actuator as described above, and a syringe pushed by the micro-telescopic actuator.

The syringe has a hollow cylindrical structure for the push rod of the miniature telescopic actuator to enter, and one end of the piston structure formed by the push rod is closely adhered to the inner wall of the syringe.

The multi-section linear sleeve can be designed as an outer sleeve or an inner sleeve, wherein the sleeves of the multi-section linear sleeve are screwed in an internal thread mode, and one sleeve is provided with a clamping part, so that the multi-section sleeve can be prevented from falling off.

The miniature telescopic actuator is a propulsion unit formed by adopting a plurality of sections of linear sleeves, and can meet the current miniaturization requirement for the injection device when applied to an automatic injection device, so that a user can conveniently operate the miniature telescopic actuator.

The specific technology adopted by the present utility model will be further described by the following examples and attached drawings.

[ description of the drawings ]

Fig. 1 is a schematic structural view of a prior art automatic injector.

Fig. 2 is a schematic view of an embodiment of the auto-injector of the micro-telescopic actuator of the present utility model.

Fig. 3 is a schematic diagram of an embodiment of the circuit and structural units of the automatic injection device of the micro-telescopic actuator of the present utility model.

Fig. 4 is a schematic view of an embodiment of a micro telescopic actuator using a magnetic force device as a driving source.

Fig. 5 is a schematic view of an embodiment of the micro telescopic actuator using a micro motor as a driving source.

Description of main reference numerals:

10. automatic injector

103. Propelling rod

100. Outer casing

107. Injection tube

109. Injection outlet

110. Ratchet wheel

20. Automatic injection device

200. Outer casing

203. Propelling rod

205. Injection outlet

207. Injection tube

210. Miniature telescopic actuator

30. Miniature telescopic actuator

301. Power supply unit

303. Control interface

305. Control unit

307. Driving unit

309. Propulsion unit

311. Injection syringe

40. Automatic injection device

400. Outer casing

411. Coil

420. Miniature telescopic actuator

430. Propelling rod

440. Injection tube

450. Injection outlet

50. Automatic injection device

500. Outer casing

510. Driving unit

511. Miniature motor

520. Miniature telescopic actuator

521. Screw thread

530. Propelling rod

540. Injection tube

550. Injection outlet

[ detailed description ] of the utility model

Since the various aspects and embodiments are merely illustrative and not restrictive, other aspects and embodiments are possible by those of ordinary skill in the art after reading this disclosure without departing from the scope of the present disclosure. The features and advantages of the embodiments will become more fully apparent from the following detailed description and appended claims.

Herein, "a" or "an" are used to describe the components and assemblies described herein. This is for convenience of description only and is provided in a generic sense to the scope of the present subject matter. Thus, unless expressly stated otherwise, such description should be construed as including one or at least one and the singular also includes the plural.

As used herein, the terms "first" or "second" and the like are used primarily to distinguish or refer to the same or similar components or structures and do not necessarily imply a spatial or temporal order of such components or structures. It will be appreciated that in some cases or configurations, ordinal terms may be used interchangeably without affecting the practice of the present utility model.

As used herein, the terms "comprising," "having," or any other similar language are intended to cover a non-exclusive inclusion. For example, a component or structure that contains multiple elements is not limited to only those elements listed herein, but may include other elements not explicitly listed but inherent to such component or structure.

The present utility model provides a micro telescopic actuator and an automatic injection device, wherein one of the main technical features is that a micro driving source is used for driving a syringe to operate, and according to an embodiment, the micro driving source can be a motor or a magnetic device, etc. to achieve a solution of miniaturization, and the operation of driving the syringe by the motor or the operation of driving the syringe by the magnetic device needs to make a pushing rod in the syringe perform reciprocating linear displacement.

The design concept of an automatic injection device employing a micro-scale actuator may be illustrated with reference to the embodiment shown in fig. 2.

The automatic injection device 20 shown in fig. 2 includes a housing 200 enclosing the mechanism and drive assembly therein, with the main structure within the housing 200 being provided with a syringe consisting essentially of a syringe barrel 207 and an injection outlet 205. The syringe 207 is a hollow cylindrical structure, the cross section of the hollow cylindrical structure may be circular, square or polygonal, the hollow structure may allow the push rod 203 to enter, the push rod 203 may be a piston structure capable of effectively compressing the internal pressure, one end of the syringe 207 extends to form the injection outlet 205, one end of the rod-shaped piston structure may be provided with a structure sealed with the inner wall of the syringe 207, for example, a rubber piston in a common syringe, and pressure can be formed in the syringe 207 to enable substances (gas or fluid) therein to be output from the injection outlet 205.

In particular, the automatic injection device 20 is provided with a micro-actuator 210. The main embodiment of the micro-actuator 210 is an electrically powered actuator, which may be a micro-motor driven actuator or an actuator that uses a coil or related circuit to create a magnetic force through electricity.

The micro telescopic actuator 210 of the present utility model has a telescopic structure, and can be shown in the embodiments shown in fig. 4 and 5, wherein the driving mode can be set according to the requirement by pushing the push rod 203 by a micro driving source such as a motor or a magnetic force device, for example, pushing the push rod 203 in a fast, medium or slow mode, so as to generate pressure in the syringe 207 and push the substance therein to the injection outlet 205 for output.

Next, please refer to fig. 3, which illustrates an embodiment of a circuit and a structural unit of an automatic injection device using a micro-scale actuator.

The main component is a micro telescopic actuator 30, the injector 311 is driven to operate by the micro telescopic actuator 30, and the injector 311 is mainly composed of an injection cylinder and an injection outlet as depicted in fig. 2, and reference may be made to a syringe device common in the prior art for further details.

According to the embodiment, the main structure and circuit components of the micro telescopic actuator 30 include a control unit 305, the control unit 305 mainly comprises a micro controller and related peripheral circuits, and the control unit 305 is electrically connected to other circuit components of the micro telescopic actuator 30 for controlling the operation of the micro telescopic actuator 30. A control interface 303 is provided on the housing of the automatic injection device for providing user operation control, the control interface 303 is electrically connected to the control unit 305, and input buttons or a touch screen can be provided to allow the user to control the power switch, set the driving mode, and monitor the operation of the device.

In the micro telescopic actuator 30, the control unit 305 is electrically connected to the power unit 301 for providing power (such as a battery and a battery), and the driving unit 307, and the embodiment of the driving unit 307 can refer to the embodiment shown in fig. 4 and fig. 5, and the structural features of the driving unit 307 will contact the pushing unit 309, and the pushing unit 309 forms a piston structure for effectively compressing the internal pressure in the syringe 311 such as the pushing rod 203 shown in fig. 2.

When the user sets the driving mode through the control interface 303, according to the driving mode, the control unit 305 controls the power output to the driving unit 307 to drive the pushing unit 309 to perform the linear reciprocating motion, so as to form a pressure difference between the pressure inside the syringe and the pressure outside, thereby pushing the substance in the syringe to output or sucking the substance from the outside into the syringe.

The micro telescopic actuator 30 may be mainly implemented as a driving unit 307 driven by electricity according to an embodiment, and the first embodiment may be illustrated with reference to the embodiment of the micro telescopic actuator using a magnetic device as a driving source shown in fig. 4.

In the automatic injection device 40 shown in fig. 4, the main structure includes a micro-actuator 420 and a syringe formed by a syringe cartridge 440 and an injection outlet 450. The housing 400 of the automatic injection device 40 encloses the micro-actuator 420 and the syringe, and the derivative structure of the housing 400 may further include a space for accommodating the syringe, and a corresponding structure capable of engaging with the syringe structure is provided, so that the syringe can be stably mounted in the automatic injection device 40.

The main structure of the micro telescopic actuator 420 in this embodiment is a multi-section linear sleeve designed by an inner sleeve, and the multi-section linear sleeve is formed into a telescopic structure, and one end of the multi-section linear sleeve is provided with a pushing rod 430, which is a piston structure in the syringe or a piston structure contacting the syringe itself, so as to push and output the substance in the syringe.

According to the illustrated embodiment of the micro telescopic actuator 420, the driving unit 410 is provided with a coil 411, and the coil 411 may be a single coil or a coil group formed by wire winding, or may be a magnetic device formed by a circuit for generating magnetic by specific induction. According to the embodiment, the driving unit 410 is electrically connected to a power unit (as shown in 301 of fig. 3) in the micro telescopic actuator 420, and is energized to form an electromagnet, one end of the multi-section linear sleeve is provided with a magnetic component (such as a magnet), and the magnetic component interacts with a magnetic force generated by the magnetic device to drive the multi-section linear sleeve to move linearly.

According to an embodiment, according to the magnetic components on the multi-section linear sleeve having a fixed magnetic force characteristic, the magnetic force direction of the electromagnet can be determined by controlling the current direction flowing through the coil 411 of the driving unit 410, that is, the magnetic force moving in a single direction can be formed by controlling the power of the power unit, and the magnetic components on the multi-section linear sleeve can be controlled to be attractive or repulsive to each other, so as to drive the multi-section linear sleeve to perform linear movement.

It should be noted that the main driving mode of the micro telescopic actuator 420 shown in fig. 4 is a multi-section linear sleeve designed by an inner sleeve, and a multi-section linear sleeve designed by an outer sleeve may also be used.

The second embodiment uses a micro motor as a driving source, and reference is made to fig. 5 for a schematic diagram of an embodiment of a micro telescopic actuator using a micro motor as a driving source.

Shown as an automatic injection device 50, a housing 500 encloses the components and circuitry therein, mainly a micro-actuator 520 and a syringe consisting mainly of a syringe barrel 540 and an injection outlet 550. According to the present embodiment, the micro telescopic actuator 520 is driven by a multi-section linear sleeve, which is shown as an example of a multi-section linear sleeve using an outer sleeve, wherein the surfaces of the sleeves are provided with threads 521, and the sleeves are coupled to each other by the threads 521 and driven by the micro motor 511. In addition, the same can be designed as an inner sleeve.

According to an embodiment, the multi-section linear sleeve has a push rod 530 at one end, which can be connected to the syringe in a specific manner. In this example, a piston structure capable of effectively compressing the internal pressure is formed in the syringe 540 by the push rod 530, and another embodiment is that the push rod 530 is connected with the piston structure in the syringe in a specific manner, and the drive unit 510 can drive the multi-section linear sleeve to drive the piston structure to move linearly.

Further, according to the illustrated embodiment, the driving unit 510 of the micro-telescopic actuator 520 includes a micro-motor 511 as a driving source for driving the multi-section linear sleeve rod to move linearly, the micro-motor 511 is electrically connected to the power unit (as shown in 301 of fig. 3) in the micro-telescopic actuator 520, and the driving mode of the micro-motor 511 is controlled according to the control unit (as shown in 305 of fig. 3), thereby controlling the multi-section linear sleeve to drive the movement of the piston structure in the syringe.

The pushing device implemented by the multi-section linear sleeve used in the micro telescopic actuator according to the above embodiment is, for example, a linear telescopic design of the multi-section sleeve, so that when the micro telescopic actuator retracts the sleeve, a part of the sleeve can be retracted into the micro telescopic actuator body, thereby increasing the pushing length of the sleeve to the maximum extent. Further, in the structure, the multiple sleeves of the multiple linear sleeves are screwed in an internal thread manner, and one sleeve is further provided with a clamping part, for example, when the sleeve is close to one section of the micro telescopic actuator body, the sleeve of the other section can be prevented from being separated from the sleeve when the sleeve extends to the longest distance.

In summary, according to the embodiments of the micro-actuator and the automatic injection device, in order to achieve the purpose of micro-actuator miniaturization, the driving unit of the micro-actuator is realized by using industrial technology of micro-electro-mechanical systems (micro electro mechanical systems, MEMS), such as the magnetic device or the micro-motor described in the embodiments, and the piston structure in the injector of the automatic injection device is driven by the micro-actuator to reciprocate linearly, for example, to output the medicine in the syringe.

The above embodiments are merely auxiliary illustrations in nature and are not intended to limit the application or uses of the embodiment or embodiments of the application target. Furthermore, while at least one illustrative embodiment has been presented in the foregoing description, it should be appreciated that a vast number of variations exist for this creation. It should also be appreciated that the embodiments described herein are not intended to limit the scope, applicability, or configuration of the claimed subject matter in any way. Rather, the foregoing embodiments will provide those skilled in the art with a convenient road map for implementing the described embodiment or embodiments. Furthermore, various changes may be made in the function and arrangement of elements without departing from the scope defined by the claims, which includes known equivalents and all foreseeable equivalents at the time of filing this patent application.

Claims (4)

1. A micro-scale actuator, the micro-scale actuator comprising:

a driving unit driven by electricity;

the pushing unit is connected with the driving unit and is of a telescopic structure formed by a plurality of sections of linear sleeves, one end of each section of linear sleeve is provided with a pushing rod, and a piston structure capable of effectively compressing the internal pressure of a syringe is formed; and

a power supply unit for supplying power to the driving unit, wherein the power supply unit is electrically connected with the driving unit through a control unit;

the driving unit further comprises a magnetic device which is electrically connected with the power supply unit, and an electromagnet is realized after the power supply unit is electrified, so that magnetic force for pushing the multi-section linear sleeve to perform linear motion is generated;

one end of the multi-section linear sleeve is provided with a magnetic component, and the magnetic component is driven to linearly move after being interacted with magnetic force generated by the magnetic device.

2. An automatic injection device, the automatic injection device comprising:

the micro-telescoping actuator of claim 1; and

a syringe pushed by the micro telescopic actuator.

3. The automatic injection device according to claim 2, wherein the syringe barrel structure of the syringe is a hollow cylindrical structure for allowing the push rod of the micro telescopic actuator to enter, and one end of the piston structure formed by the push rod is closely adhered to the inner wall of the syringe barrel.

4. An automatic injection device according to claim 3, wherein said plurality of linear sleeves are of an outer sleeve design or of an inner sleeve design, wherein said plurality of linear sleeves are internally threaded together and wherein one of said sleeves is provided with a detent.