CN108392699A - Devices and methods therefor for injection - Google Patents

Abstract

A device for injection, having a housing (1) and an actuation button (2) with a planar part (3) and an extension part (4), which extends when the device is in an inoperative state The part (4) is basically completely accommodated in the casing (1). The invention can reduce the overall length of the automatic injector in the non-operating state, thereby reducing the cost of packaging, transportation and storage, and at the same time improving portability; avoiding the user's confusion that the protruding drive button cannot be directly pressed down, so that the user can only press the injection lock Only when it is released, will the drive button be found to be in the state of protruding from the shell and protruding/ejecting towards the rear end, thus constructing a more reasonable and complete user operation logic and greatly improving the user experience.

Description

Device for injection and method thereof

technical field

The invention relates to the field of drug supply, in particular to a safe, reliable and non-destructive drug delivery injection device.

Background technique

At present, in the field of drug supply, various syringe devices with a certain degree of automation and direct access to injection in emergency situations have been produced, such as the following prior art:

Document 1: CN1901957B device for syringe

Document 2: US7442185B2 Auto-injector

Document 1 discloses an automatic injector having a rear part of the housing (with the injection output direction as the front), an actuation button, a tubular driver, and an actuator sleeve. The rear portion of the tubular driver has a plurality of flexible tongues each having an outwardly facing hook at an outer end and a projection having an inclined surface. A ring is arranged inside the housing, the ring has a circumferential flange, the ring has a shape corresponding to the hook of the tubular driver, and when the syringe is not injected (or initial state), The hook engages the flange to prevent forward movement of the tubular driver relative to the housing. The rear part of the actuator sleeve has two oppositely arranged rectangular cutouts forming two raised plates of the rear part of the actuator sleeve between which the upper edges of the raised plates will be inclined with the tongues on the tubular driver. Surface contact, as the actuator sleeve moves backwards, the hooks move backwards and inwards, and pass freely into the interior of the circumferential flange, at this time, if the drive button is pressed down, the tubular The driver moves forward relative to the housing, thereby triggering the automatic injection action.

Document 2 also discloses an automatic injector, which has a rear shell (with the injection output direction as the front), and is sheathed from the inside to the outside: a compression spring, a plunger, a tubular body and a tubular sleeve. Wherein the rear top of the tubular body is the driving button. When the tubular sleeve moves backwards, the locking of the forward movement of the tubular body and its drive button can be released. At this time, the drive button can enter the inner space of the tubular sleeve forward to move further forward, while the tubular body The body moves forward as a whole until the front end of the tubular body is released to release the cover lock on the front end of the plunger, and under the action of the compression spring, the plunger further rushes out of the tubular body, thereby triggering the automatic injection action.

However, as mentioned above, in existing autoinjectors, especially in autoinjector products, the injection action is activated by pressing down on the proximal top drive button. When the syringe is in an uninjected state (or called an initial state), the driving button is always in a state of protruding out of the shell and protruding/ejecting toward the rear end relative to the shell of the rear part.

Such a design and construction can cause many problems: first, it increases the overall length of the auto-injector in the uninjected state, increases packaging, transportation and storage costs, and reduces portability; It is easy to think of trying to press the one that protrudes out of the shell and protrudes/ejects toward the rear end, but finds that the actuation button cannot be pressed directly (based on the locking principle of the injection needle shield in Document 1 and Document 2) On the one hand, this will cause confusion for the user. On the other hand, if the user presses it hard, it will cause damage or misalignment of components such as the drive button and the tubular driver inside the housing, thereby causing damage to the entire syringe.

Contents of the invention

It should be noted that the "non-injection state" referred to herein refers to the state when the injection device is not performing "injection operation". The release of the injection locking state, pressing the drive button to activate the automatic injection, the output of the medicinal liquid to the injection site, and the withdrawal of the device from the injection site after the injection is completed.

Aiming at the problems existing in the prior art, the present invention provides a safe, reliable and indestructible drug delivery device, the device has a housing 1 and a driving button 2, and the driving button 2 has a flat part 3 and an extension part 4 , which is characterized in that: when the device is in a non-injected state, the extension part 4 is basically completely accommodated in the casing 1 .

Further, the device also has an actuator sleeve 5 , the upper edge of the rear part of the actuator sleeve 5 can be in contact with the extension part 4 .

Further, the extension part 4 has a lower convex part 15 and an upper concave part 16, and the device also has an actuator sleeve 5 and a tubular driver 6, and the actuator sleeve 5 has an upper convex part 14 and a lower concave part 13, the upper edge of the convex part 14 can contact with the concave part 16; the tubular driver 6 has an inclined surface 10, and the upper edge of the concave part 13 can contact with the inclined surface 10.

Further, during the injection operation, the contact between the convex part 14 and the concave part 16 of the extension part 4 is almost simultaneously with the contact between the concave part 13 and the inclined surface 10 .

Further, during the injection operation, the contact between the convex part 14 and the concave part 16 of the extension part 4 is earlier than the contact between the concave part 13 and the inclined surface 10 .

Further, at least one of the two surfaces in contact with each other is an inclined surface.

Further, the device also has an actuator sleeve 5, and as the actuator sleeve 5 moves backward, the extension part 4 protrudes upward from the housing 1; when the extension part 4 protrudes upward After the casing 1 is removed, if the injection is abandoned, the drive button 2 is retracted, so that the extension part 4 is stored in the casing 1 again.

Further, the driving button 2 is recovered under the action of gravity or under the action of magnetic attraction.

Further, under the condition of the magnetic attraction effect and the device is in the uninjected state, the device is turned upside down so that the drive button 2 is located under the entire device, and the drive button 2 is under the action of the magnetic attraction force. , not easy to slide down from the shell 1.

The present invention also provides an injection method using the device, which includes the following steps:

a. When not being injected, the extension part 4 of the drive button 2 is basically completely accommodated in the casing 1;

b. Press the front end of the device against the injection site, and the extension 4 of the drive button 2 protrudes out of the housing 1;

c. Hold the front end of the device against the injection site, and simultaneously press the drive button 2 to activate the automatic injection action;

d. In step c, if the injection is abandoned, the extension part 4 is automatically stored in the housing 1 again.

The benefits of the present invention are:

(1) The present invention can reduce the overall length of the auto-injector in the uninjected state, thereby reducing packaging, transportation and storage costs, while improving portability.

(2) The present invention can avoid the situation where the user tries to press the driving button down due to curiosity, and avoids damage or misalignment of the driving button and the internal components of the syringe housing under forced pressing;

(3) The present invention can avoid the user's confusion that the protruding drive button cannot be directly pressed to start the injection action, so that the user can only release the injection lock (such as the injection needle shield abutting on the injection site and pressing the button in Background Art Document 1). When it is compressed into the housing), the drive button will be found to be in the state of protruding from the housing and protruding/ejecting to the rear end, thus constructing a more reasonable and complete user operation logic and greatly improving the user experience.

(4) The present invention can automatically return the drive button to the original storage state when the injection lock is released and the user gives up the injection.

Description of drawings

Fig. 1 is a schematic top view of the housing side of Embodiment 1 of the present invention.

Fig. 2 is a schematic top view of the drive button side in Embodiment 1 of the present invention.

Fig. 3 is a schematic side plan view of the cooperation between the drive button and the casing in the non-injection state of Embodiment 1 of the present invention.

Fig. 4 is a schematic diagram of the actuator sleeve in Embodiment 1 of the present invention.

Fig. 5 is a schematic diagram of the tubular driver in Embodiment 1 of the present invention.

Fig. 6 is an exploded schematic view of the driving button, tubular driver and actuator sleeve in Embodiment 1 of the present invention.

Fig. 7 is a combined schematic diagram of the driving button, the tubular driver, the actuator sleeve and the inward flange of the inner wall of the casing in Embodiment 1 of the present invention (the casing is not shown).

Fig. 8 is a schematic view of the engagement between the hook of the tubular driver and the inward flange of the inner wall of the casing in Embodiment 1 of the present invention (the casing is not shown).

Fig. 9 is a cross-sectional view of the engagement of the hook of the tubular driver and the inward flange of the inner wall of the housing in Embodiment 1 of the present invention (showing the housing).

Fig. 10a is a cross-sectional view of the cooperative relationship among the driving button, the tubular driver, the actuator sleeve, the shell and the inward flange of the inner wall thereof in the non-injection state in Embodiment 1 of the present invention.

Fig. 10b is a schematic diagram of the position when the actuator sleeve of Embodiment 1 of the present invention moves backward, when its convex part just contacts the concave part of the driving button.

Figure 10c is the position when the actuator sleeve of Embodiment 1 of the present invention moves backward, driving the driving button to move backward together, when the driving button protrudes from the shell and the hook of the tubular driver freely passes to the inside of the inward flange schematic diagram.

Fig. 11 is a schematic diagram of the part in contact with the concave part of the extension part of the driving button on the convex part of the actuator sleeve set as an inclined surface in Embodiment 1 of the present invention.

Fig. 12 is a schematic top view of the housing side of Embodiment 2 of the present invention.

Fig. 13 is a front view of the drive button according to Embodiment 2 of the present invention.

Fig. 14a is a schematic diagram of the cooperative relationship among the driving button, the tubular driver, the actuator sleeve, the plunger, the compression spring and the housing in the non-injection state in Embodiment 2 of the present invention.

Fig. 14b is a schematic diagram of driving the driving button to move backward together when the actuator sleeve moves backward in Embodiment 2 of the present invention, and the driving button protrudes out of the housing.

Fig. 14c is a schematic diagram of the drive button being pushed down in Embodiment 2 of the present invention, and its extension enters the inner space of the upper edge of the rear part of the actuator sleeve.

Detailed ways

Example 1:

As shown in Fig. 1-Fig. 11, it is the first embodiment of the present invention.

A device for injection having a housing 1 (with the direction of injection output as the front, only the rear part of the housing is shown in FIG. 1 ) and an actuation button 2 with a planar part 3 and an extension 4 , the extending direction of the extending portion is substantially perpendicular to the planar direction of the planar portion. The extension part 4 has a plurality of rectangular cutouts arranged opposite to each other, and a plurality of raised plates of the extension part 4 are formed between the cutouts, and the raised plates include a central lower convex part 15 and an outer upper concave part 16 .

The driving button 2 is used to activate the automatic injection action of the injection device. The device also includes an actuator sleeve 5 (only the rear part is shown in FIG. 4 ) and a tubular driver 6 (only the rear part is shown in FIG. 5 ), the rear part of which has a plurality of flexible The flexible tongues 7 each have a hook 8 facing outwards at the outer end and a protruding portion 9 which is located below the hook 8 and has an inclined surface 10.

An inward flange 11 is arranged inside the housing 1, and the inward flange 11 has a shape corresponding to the hook 8 of the tubular driver 6. When the syringe is not injected (or called the initial state), the The hook 8 engages the inward flange 11 to prevent forward movement of the tubular driver 6 relative to the housing 1 .

The rear portion of the actuator sleeve 5 has a plurality of oppositely arranged rectangular cutouts 12, forming a plurality of raised plates of the rear portion of the actuator sleeve 5 between the cutouts, and the convex plates include a central concave portion 13 and an outer side. The raised portion 14, the raised portion 14 has flexibility. The upper edge of said concave portion 13 can be in contact with the inclined surface 10 of the tongue on the tubular driver 6 ;

When the injection action is to be performed, on the one hand, as the actuator sleeve 5 moves backward, the upper edge of the convex portion 14 of the actuator sleeve 5 contacts the upper concave portion 16 of the extension portion 4 of the drive button 2, Therefore, the drive button 2 moves backwards with the backward movement of the actuator sleeve 5, and then the extension part 4 of the drive button 2 protrudes upward from the housing 1; on the other hand, as the actuator sleeve 5 moves backward , so that the upper edge of the concave portion 13 of the actuator sleeve 5 is in contact with the inclined surface 10 of the tongue on the tubular driver 6, so that the hook 8 moves backward and inward, and freely passes to the inward Inside the flange 11, if the drive button 2 whose extension part 4 has protruded from the housing 1 is pushed down, the lower convex part 15 of the drive button 2 can enter the upper convex part 14 of the actuator sleeve 5. inner space, and make the lower convex part 15 of the driving button 2 contact the upper edge of the rear part of the tubular driver 6, and the tubular driver 6 moves forward relative to the housing 1 under the action of the lower convex part 15 of the driving button 2, thereby Initiate automatic injection action.

Preferably, as the actuator sleeve 5 moves backward, the upper edge of the raised portion 14 contacts the upper concave portion 16 of the extension 4 of the drive button 2 almost simultaneously with the lower concave portion 13 of the actuator sleeve 5 . The upper edge is in contact with the inclined surface 10 of the tongue on the tubular driver 6;

More preferably, as the actuator sleeve 5 moves backward, the upper edge of the raised portion 14 comes into contact with the upper concave portion 16 of the extension 4 of the drive button 2 earlier than the lower concave portion of the actuator sleeve 5 The upper edge of 13 is in contact with the inclined surface 10 of the tongue on the tubular driver 6;

Preferably, on the convex part 14 of the actuator sleeve 5, the part in contact with the concave part 16 of the extension part 4 of the drive button 2 is set as an inclined surface (inclined to the inner side); or on the drive button 2 On the upper concave part 16 of the extension part 4, the part in contact with the upper convex part 14 of the actuator sleeve 5 is set as an inclined surface (inclined to the outer side); more preferably: the actuator sleeve 5 The upper convex part 14 and the upper concave part 16 of the extension part 4 of the driving button 2 are respectively provided with inclined surfaces that cooperate with each other at the parts where the two are in contact, so as to facilitate the extension part 4 of the driving button 2 to enter the actuator sleeve 5 inner space.

When the actuator sleeve 5 moves backwards and the extension 4 of the drive button 2 protrudes upwards from the housing 1, but the user decides to give up the injection, the actuator sleeve 5 moves forward and returns to the initial position (in the case of a non-injected state). Position), the extension part 4 of the driving button 2 is received in the housing 1 again, and the hook 8 is engaged with the inward flange 11 again.

Preferably, the drive button 2 is recovered under the action of gravity, so that the extension 4 is automatically re-accommodated in the housing 1; Near the edge contact, and/or the vicinity of the contact between the upper convex part 14 of the actuator sleeve 5 and the upper concave part 16 of the extension part 4 of the drive button 2, a magnetically attractive metal material and a magnetic material corresponding to each other are arranged, Or the magnetic materials corresponding to each other and opposite in polarity on adjacent surfaces can make the extension part 4 of the driving button 2 be automatically re-accommodated in the casing 1 through the magnetic attraction force. The magnetic material can be materials capable of generating magnetic attraction, such as magnets and rubber magnets. Under the action of the magnetic attraction force, not only can the extension part be automatically re-accommodated, but also in the non-injection state, when the rear end of the syringe is turned upside down, the drive button 2 is not easy to slide down from the housing 1 . Here, "it is not easy to slide down from the housing 1" can also be understood as: even if the driving button 2 is in the state of sliding down from the housing 1, it can be recovered into the housing 1 under the action of magnetic attraction force.

Preferably, the extension 4 has four protrusions, the corresponding actuator sleeve 5 has four protrusions, and the rear part of the tubular driver 6 has four flexible tongues 7; but the invention is not limited thereto, the above-mentioned The number of protruding plates and flexible tongues can also be correspondingly set to two or more than three, as long as the selection of the number can achieve the effect of corresponding contact and action between the components.

It should be noted that, in the first embodiment above, the content related to the driving button of the present invention is mainly described. The specific methods and component settings for automatic injection and prevention of false excitation can be introduced into this article from the relevant content in the published document CN1901957B, so details will not be repeated here.

Example 2:

As shown in Fig. 12-Fig. 14, it is the second embodiment of the present invention.

Different from Embodiment 1, the extension part 4 of the driving button 2 in Embodiment 2 does not have a downward convex portion 15 and an upward concave portion 16 (as shown in FIG. 13 ). Inside the rear end of the rear part of the housing 1, there is a disc portion 17 at the central position, and the disc portion 17 is fixedly connected with the inner wall of the housing through a plurality of radial portions radiating in the radial direction (as shown in FIG. 12). The tubular driver 6 (only the rear part of which is shown in Figures 14a-14c) has a plunger 18 therein which has a compression spring 19 (Figures 14a-14c Only the rear part of it is shown in ), the actuator sleeve 5 is sleeved on the outside of the tubular driver 6 and located in the housing 1 .

As shown in Figure 14a, a part of the upper end of the rear part of the tubular driver 6 is in contact with the lower surface of the disc part 17, and the other part is radially beyond the outer edge of the lower surface of the disc part 17, and the compression spring 19 abuts against the lower surface of the middle portion of the disc portion 17 .

When the injection action is to be performed, on the one hand, as the actuator sleeve 5 moves backward, the upper edge of the rear part of the actuator sleeve 5 contacts the extension 4 of the drive button 2, so that the drive button 2 The actuator sleeve 5 moves backward, and then the extension part 4 of the driving button 2 protrudes upwards from the casing 1; The extension 4 of the drive button 2 can enter the inner space of the upper edge of the rear part of the actuator sleeve 5 to move further forward, and make the lower end of the extension 4 of the drive button 2 contact the end of the tubular driver 6 rear part. In the part, the part radially beyond the outer edge of the lower surface of the disc part 17 abuts, and the tubular driver 6 moves forward relative to the housing under the action of the extension part 4 of the drive button 2, and the plunger 18 and the compression spring Under the action of 19, complete the excitation automatic injection action.

When the actuator sleeve 5 moves backwards and the extension 4 of the drive button 2 protrudes upwards from the housing 1, but the user decides to give up the injection, the actuator sleeve 5 moves forward and returns to the initial position (in the case of a non-injected state). position), the extension part 4 of the drive button 2 is stored in the casing 1 again.

Preferably, on the upper edge of the rear part of the actuator sleeve 5, the part in contact with the lower end of the extension 4 of the drive button 2 is set as an inclined surface (inclined to the inner side); or on the extension of the drive button 2 The lower end of 4, the part that is in contact with the upper edge of the rear part of the actuator sleeve 5, is set as an inclined surface (inclined to the outer side); more preferably: the parts that are in contact with each other are respectively provided with mutual cooperation The inclined surface is to facilitate the extension 4 of the drive button 2 to enter the space inside the sleeve 5 of the actuator.

Preferably, the driving button 2 is recovered under the action of gravity, so that the extension part 4 is automatically re-accommodated in the housing 1; In the vicinity where the upper edge of the back part is in contact, corresponding magnetically attractive metal materials and magnetic materials, or magnetic materials corresponding to each other and opposite in polarity on the adjacent surfaces are arranged, and the extension part 4 of the drive button 2 is automatically reset by magnetic attraction. It is accommodated in the casing 1. The magnetic material can be materials capable of generating magnetic attraction, such as magnets and rubber magnets. Under the action of the magnetic attraction force, not only the extension part can be automatically re-accommodated, but also in the non-injection state, when the rear end of the syringe is turned upside down, the driving button 2 is not easy to slide down from the housing 1 . Here, "it is not easy to slide down from the shell 1" can also be understood as: even if the driving button 2 is in the state of sliding down from the shell 1, it can be recovered into the shell 1 under the action of magnetic attraction force.

It should be noted that, in the above-mentioned embodiment 2, the content related to the driving button of the present invention is mainly described. The specific methods and component configurations for automatic injection and prevention of false excitation can be introduced into this article from the relevant content in the published document US7442185B2, so details will not be repeated here.

In addition, when using the injection device of the present invention, the commonly used injection method includes the following steps:

a. When not being injected, the extension part 4 of the drive button 2 is basically completely accommodated in the casing 1;

b. press the front end of the device against the injection site, and extend the extension part 4 out of the shell 1;

c. Hold the front end of the device against the injection site, and simultaneously press the drive button 2 to activate the automatic injection action;

d. In step c, if the injection is abandoned (for example, the device is moved away from the injection site without pressing the drive button 2), the extension part 4 is automatically re-accommodated in the housing (1).

In addition, although several embodiments and preferred implementations of the present general inventive concept have been shown and described, those skilled in the art should understand that these embodiments can be modified without departing from the principle and spirit of the present general inventive concept. Subject to change, the general inventive concept is defined by the claims and their equivalents.

Claims (10)

1. a kind of device for injection, described device has shell（1）And activation button（2）, the activation button（2）Have Planar portions（3）And extension（4）, it is characterised in that：When described device is in and does not inject state, the extension（4）Substantially Upper whole is accommodated in the shell（1）It is interior.

2. the apparatus according to claim 1, wherein described device also has executing agency's sleeve（5）, the executing agency Sleeve（5）The top edge of aft section can be with extension（4）Contact.

3. the apparatus of claim 2, wherein the extension（4）With lower convex portion（15）With fovea superior part （16）, described device is also with executing agency's sleeve（5）With tubulose driver（6）, executing agency's sleeve（5）With convex Part（14）And recessed portion（13）, the convex part（14）Top edge can be with the fovea superior part（16）Contact；Institute State tubulose driver（6）With inclined surface（10）, the recessed portion（13）Top edge can be with the inclined surface （10）Contact.

4. device according to claim 3, wherein when carrying out injection operation, the convex part（14）With extension （4）The fovea superior part（16）Contact, almost simultaneously in the recessed portion（13）With the inclined surface（10）Connect It touches.

5. device according to claim 3, wherein when carrying out injection operation, the convex part（14）With extension （4）The fovea superior part（16）Contact, be earlier than the recessed portion（13）With the inclined surface（10）Contact.

6. according to any device in claim 2-5, wherein in two faces respectively to contact with each other, at least one of which For inclined surface.

7. the apparatus according to claim 1, wherein described device also has executing agency's sleeve（5）, and with described Executing agency's sleeve（5）It moves backward, the extension（4）The shell is stretched out upwards（1）；In the extension（4）Upwards Stretch out shell（1）Afterwards, if abandoning injecting, the activation button（2）Recycling, to make extension（4）Again it is accommodated in described outer Shell（1）It is interior.

8. device according to claim 7, wherein the activation button（2）It recycles under the effect of gravity or in magnetic It is recycled under the action of gravitation.

9. device according to claim 8, wherein with the magnetic attraction effect, and device is in When not injecting state, described device inversion is made into activation button（2）Positioned at the lower section of whole device, then activation button（2）Institute It states under magnetic attraction effect, is not easy from shell（1）Middle cunning stretches.

10. a kind of method for injection of any device in 1-9 according to claim comprising following steps：

When a. not injecting, activation button（2）Extension（4）It is substantially all to be accommodated in the shell（1）It is interior；

B. the front end of device is compressed at injection site, activation button（2）Extension（4）Stretch out the shell（1）；

C. the front end of holding meanss compressing at injection site, while pressing the activation button（2）, excitation automatically injects dynamic Make；

D. in step c, if abandoning injecting, extension（4）Automatically it is accommodated in shell again（1）It is interior.