CN215334101U - Pressure reducing spring suitable for automatic medicine feeder - Google Patents

Abstract

The utility model relates to a pressure reducing spring suitable for an automatic drug delivery device, which comprises a compression spring body, wherein the compression spring body is of a variable-pitch structure, two ends of the compression spring body are respectively provided with a bottom end head compression section and a top end head compression section, a middle section compression distance section is distributed in the middle section of the compression spring body, and the bottom end head compression section and the middle section compression distance section, the top end head compression section and the middle section compression distance section all form a deformation section. Therefore, the distribution of the middle-section compression distance section, the top end compression section and the middle-section compression distance section is relied on, the deformation stress transfer mode for the buffering effect is realized, the stress impact during the percussion is reduced, and the use comfort of a user is improved. The shell can not be defeated to produce secondary impact pressure when contacting with skin, and stable percussion and defeat can be realized during the user's service function.

Description

Pressure reducing spring suitable for automatic medicine feeder

Technical Field

The present invention relates to a spring assembly, and more particularly to a relief spring suitable for use in an automatic medication administration device.

Background

Currently, in order to facilitate users to realize independent and convenient self-administration therapy, self-administration systems or devices are popular. For the convenience of understanding, the automatic injector is mainly designed to have a disposable function in view of safety in use and in order to avoid secondary abuse.

The existing disposable automatic injector has very complex design principle, leads to a plurality of parts which are generally more than 15, so the reliability is not high, the assembly difficulty is large, and the final product cost is too high.

CN110237366A discloses a medical injection device, which comprises an outer barrel and a pen cap, one end of the outer barrel is provided with a detachable medicine bin, a replaceable standard card type medicine bottle is arranged in the medicine bin, one end of the inner part of the outer barrel close to the medicine bin is provided with a fixed sleeve, the inner axial movement of the fixed sleeve is provided with a push rod seat, the inner part of the push rod seat is provided with a transmission ring which can be meshed with the end part of a transmission rod, the outer side of the transmission rod is sleeved with a ratchet ring which can axially slide, one end face of the ratchet ring is in one-way meshing with the inner part of the outer barrel, the other end of the ratchet ring is axially provided with a first spring, one end of the push rod seat is axially provided with a push rod seat spring which is propped against the outer barrel, and one end of a push rod penetrates through the push rod seat to stretch into the standard card type medicine bottle to be connected with a push block.

CN109999272A discloses a disposable adjustable injection device for insulin injection, which comprises a protective cover, a disposable needle, a pen core sleeve, a main body shell, a pen core and an adjusting component, one end of the main body shell is provided with a second boss, the outside of the second boss is provided with a refill sleeve, one end of the pencil lead sleeve is provided with a thread groove, the external thread of the second boss is in threaded connection with the thread groove, the other end of the refill sleeve is provided with a first boss, the outside of the first boss is connected with a disposable needle head through threads, a steel needle is inserted in the disposable needle head, a pen core is arranged in the pen core sleeve, a protective cover is sleeved outside the pen core sleeve, the other end of main body cover is provided with adjusting part, main body cover's internally mounted has fixed sleeve, fixed sleeve's one end outside protrusion has flange portion.

CN102264417A discloses an injection device comprising: a long housing; a container carrier having a medicament container to which a needle is mounted; a puncture device comprising a separation sleeve, a preloaded puncture spring device and a puncture holding device, wherein said preloaded puncture spring device is capable of acting on said separation sleeve and thereby on said container carrier for a sliding movement of said container and needle, and said puncture holding device is capable of holding said puncture spring device in a loaded state; injection means comprising a plunger rod, pre-loaded injection spring means and injection retaining means, wherein the plunger rod is arranged to act on a stopper in the medicament container, the pre-loaded injection spring means is adapted to act on the plunger rod such that the stopper is displaced within the container, and the injection retaining means is adapted to retain the injection spring means in a loaded state; retraction means comprising a preloaded retraction spring and retraction holding means, wherein the preloaded retraction spring is arranged to act on the separation sleeve and thereby on the container carrier, and the retraction holding means is capable of holding the retraction spring in a loaded state; a puncture sequence initiating means capable of acting on a puncture trigger means arranged on said separation cannula for disconnecting said puncture holding means; an injection trigger means provided on said separation sleeve and capable of disconnecting said injection holding means to initiate an injection sequence when the separation sleeve and the plunger rod are moved to a specific position; and retraction triggering means arranged on said separation sleeve and capable of disconnecting said retraction holding means for initiating needle retraction when said plunger rod has been moved to a certain position; characterized in that the device further comprises damping means comprising a compartment containing a volume of a highly viscous liquid and being partly defined by the outer surface of the plunger rod and the inner surface of the cap, wherein the compartment is arranged with a channel through which the liquid is forced only upon initiation of the injection sequence, such that the volume within the compartment decreases with movement of the plunger rod in the container during the entire injection sequence and thereby damping shear forces are generated.

Meanwhile, the automatic injector disclosed in combination with 202011110579.9 comprises a body (1), a needle protecting cover (2), a push rod (3), a sound tube (4), an inner tube (5), a release ring (6), a driving elastic element and a reset elastic element;

a needle cylinder fixing structure for fixing the needle cylinder (9) is arranged in the shell (1), and an opening for the needle head (91) to extend out is formed in the front end of the shell (1);

the release ring (6) and the needle shield (2) are sequentially arranged on the inner side of the shell (1) in a sliding manner from the rear end to the front end, the needle shield (2) can extend out of the front end of the shell (1) and can slide towards the rear end relative to the shell (1) and push the release ring (6), and the reset elastic piece acts on the release ring (6) and drives the release ring (6) to push the needle shield (2) to slide towards the front end of the shell (1); the shell (1) is provided with a needle shield limiting structure for limiting the forward sliding distance of the needle shield (2) relative to the shell (1);

the push rod (3) is arranged in the shell (1) in an axially sliding mode, the front end of the push rod (3) is used for pushing a piston (93) in the needle cylinder (9), the driving elastic piece acts on the push rod (3) and drives the push rod (3) to slide towards the front end of the needle cylinder (9), and a push rod limiting structure is arranged on the periphery of the push rod (3);

the sounding cylinder (4) is sleeved on the periphery of the push rod (3) in an axially sliding manner, the driving elastic piece acts on the sounding cylinder (4) and drives the sounding cylinder (4) to slide towards the rear end of the shell (1), the sounding cylinder (4) is provided with a push rod limiting and matching structure, and a sounding cylinder limiting structure is arranged between the sounding cylinder (4) and the inner tube (5);

the inner pipe (5) is fixed in the shell (1) and sleeved on the periphery of the sounding cylinder (4), the release ring (6) is sleeved on the periphery of the inner pipe (5) in a sliding mode, the inner pipe (5) is provided with a first clamping clip (55) capable of elastically moving along the radial direction, and the first clamping clip (55) is deflected outwards along the radial direction under the action of self elasticity;

first clamping (55) can be in along radial inside skew and pass through under the limiting displacement of the inner wall of release ring (6) the spacing cooperation structure of push rod with the mutual joint of push rod limit structure is spacing, it can restrict under the supporting action of the outer wall of push rod (3) to sound a section of thick bamboo (4) with the relative slip of inner tube (5), push rod (3) can break away from behind the preset distance to the front end slip to sound a section of thick bamboo limit knot's support.

Conventional self-administration devices such as automatic injectors are often supplemented with a corresponding defeat feature, such as a defeat housing, to prevent secondary piercing and use. However, during use, the frustrating shell may give rise to a secondary impact on the skin of the injection site under the force of the secondary spring, which may cause a certain discomfort during use.

In view of the above-mentioned drawbacks, the present inventors have conducted active research and innovation to create a pressure reducing spring suitable for an automatic drug delivery device, so that the self-drug delivery device can have a better comfort level during use.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, an object of the present invention is to provide a pressure-reducing spring suitable for an automatic medication administering device.

The pressure reducing spring suitable for the automatic drug delivery device comprises a compression spring body, wherein: the compression spring body is of a variable-pitch structure, a bottom end head compression section and a top end head compression section are respectively arranged at two ends of the compression spring body, a middle section compression distance section is distributed in the middle section of the compression spring body, and the bottom end head compression section and the middle section compression distance section, and the top end head compression section and the middle section compression distance section all form a deformation section.

Further, the above pressure relief spring suitable for an automatic drug delivery device, wherein the compression spring body is located at a gap of the deformation section, which is larger than a gap of the bottom end head compressed section, the top end head compressed section and the middle section compressed distance section.

Furthermore, the above pressure relief spring for an automatic drug delivery device, wherein the compression spring body has a contact surface at the bottom end compressed section, the top end compressed section, and the middle compressed distance section.

Further, the above pressure relief spring for an automatic drug delivery device, wherein the end of the compression spring body is provided with a rounded chamfer.

Further, the above-mentioned pressure-reducing spring for an automatic drug delivery device, wherein the cross-section of the compression spring body is elliptical or rectangular.

Still further, the pressure relief spring suitable for an automatic drug delivery device is provided, wherein the compression spring body is provided with a marked area.

By the scheme, the utility model at least has the following advantages:

1. the distribution of the middle-section compression distance section, the top end compression section and the middle-section compression distance section is relied on, so that a deformation stress transfer mode for a buffering effect is realized, stress impact during percussion is reduced, and the use comfort of a user is improved.

2. The shell can not be defeated to produce secondary impact pressure when contacting with skin, and stable percussion and defeat can be realized during the user's service function.

3. The whole structure is simple, the manufacture is easy, and the implementation cost is low.

4. Can realize convenient spring replacement to current automatic device of dosing and use, it is better to have a general purpose.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of the overall construction of a pressure relief spring suitable for use in an automatic drug delivery device.

Fig. 2 is a schematic view of an assembled structure of a pressure reducing spring suitable for use in an automatic drug delivery device.

Fig. 3 is a schematic view of the compression spring body being compressed during use.

Fig. 4 is a schematic view of the compression spring body released and making frustrating contact during use.

Fig. 5 is a standby state view of a pressure-reducing spring applied to an automatic medication administering device.

Fig. 6 is a schematic view of the extreme compression state of a compression spring suitable for use in an automatic drug delivery device.

The meanings of the reference symbols in the drawings are as follows.

1 bottom end compressed section 2 top end compressed section

3 middle section pressure distance section 4 sliding block component

5 push rod 6 compression spring body

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

The relief spring suitable for use in an automatic drug delivery device, as shown in figures 1 to 4, comprises a compression spring body 6, which is distinguished in that: the compression spring body 6 employed is of variable pitch construction. Specifically, the compression spring body 6 is provided with a bottom end compression section 1 and a top end compression section 2 at both ends thereof, respectively. Meanwhile, the middle section of the compression spring body 6 is distributed with a middle-section pressure-bearing distance section 3. In order to bear the pressure brought by the percussion and avoid the pressure from finally and directly acting on the frustrating shell, avoid the user from feeling improper injection stress and provide more comfortable injection feeling, the bottom end pressed section 1 and the middle section pressed distance section 3, and the top end pressed section 2 and the middle section pressed distance section 3 all form a deformation section. Of course, multiple intermediate compression space segments 3 may be provided for certain specific administration requirements.

In a preferred embodiment of the present invention, the gap of the compression spring body 6 in the deformation section is larger than the gaps of the bottom end compression section 1, the top end compression section 2 and the middle section compression distance section 3. Like this, in the time of practical use, can guarantee that deformation district can effectual pressurized compression, and the compression ratio is great, and bottom end pressurized district 1, top end pressurized district 2, middle section pressurized distance district 3 displacement when the pressurized are less, and can utilize the middle section pressurized distance to avoid the transmission many times of stress apart from existence in district 3.

Further, in order to reduce the possibility of deformation and compression under special extreme use environments, the compression spring body 6 has a contact surface at the positions of the bottom end compression section 1, the top end compression section 2 and the middle distance compression section 3. Therefore, due to the existence of the fit contact surface, the corresponding sections are collided and cannot be further compressed, and the rebound stress generated by deformation can be effectively eliminated.

From the practical manufacturing point of view, the end of the compression spring body 6 is provided with a circular arc chamfer. Therefore, the sharp end caused by shearing manufacturing can be ground, the assembly personnel or other components in the automatic drug delivery device cannot be hurt, and the use stability is ensured.

Still further, the compression spring body 6 is oval or rectangular in cross-section in order to conform to the shape of the components for firing within the automatic administration device. Thus, the utility model can be effectively sleeved outside various firing components such as a bearing body.

Meanwhile, because the shapes of the compression spring bodies 6 are similar, in consideration of different requirements of different self-administration devices on the coefficient of stiffness of the spring, in order to select the compression spring body 6 with a proper model, the compression spring body 6 is provided with a labeling area. Therefore, different model parameters can be marked, and quick and effective selection during assembly is facilitated.

The working principle of the utility model is as follows:

when the self-administration device is loaded with the present invention as a secondary spring, the lower end of the bottom end pressing section 1 abuts against the slider assembly 4.

During use, the slider assembly 4 is guided to move to a distance H1, and the push rod 5 is triggered along with the use operation of the user. During this period, the pressure variation generated by the present invention is small, and the user does not have a significant pressure feeling when the frustrating shell is pressed against the skin, so that the frustrating shell fits more comfortably against the skin of the injection area.

After that, along with the completion of the firing injection, the slide block assembly 4 moves downwards under the rebound force of the utility model to reach the distance H2, and then contacts with the frustrating shell to realize the limit frustration.

Briefly, referring to fig. 5, in the standby state, the deformation zone has a certain deformation compression space. When the main spring in the automatic drug delivery device needs to be triggered, as shown in fig. 6, the present invention is in a limited compression state, the deformation section is completely compressed, and the bottom end compression section 1, the top end compression section 2 and the middle section compression distance section 3 do not generate deformation due to the absence of deformable gaps, and can effectively bear the stress brought by the compression period.

The utility model has the following advantages by the aid of the character expression and the accompanying drawings:

1. the distribution of the middle-section compression distance section, the top end compression section and the middle-section compression distance section is relied on, so that a deformation stress transfer mode for a buffering effect is realized, stress impact during percussion is reduced, and the use comfort of a user is improved.

2. The shell can not be defeated to produce secondary impact pressure when contacting with skin, and stable percussion and defeat can be realized during the user's service function.

3. The whole structure is simple, the manufacture is easy, and the implementation cost is low.

4. Can realize convenient spring replacement to current automatic device of dosing and use, it is better to have a general purpose.

Furthermore, the indication of the orientation or the positional relationship described in the present invention is based on the orientation or the positional relationship shown in the drawings, and is only for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or configuration must have a specific orientation or be operated in a specific orientation configuration, and thus, should not be construed as limiting the present invention.

The terms "primary" and "secondary" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "primary" or "secondary" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Also, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "disposed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other or mutually interacted. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. And it may be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings, which are used for convenience in describing the utility model and to simplify the description, and do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the utility model.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. Decompression spring suitable for automatic device of dosing, including the compression spring body, its characterized in that: the compression spring body is of a variable-pitch structure, a bottom end head compression section and a top end head compression section are respectively arranged at two ends of the compression spring body, a middle section compression distance section is distributed in the middle section of the compression spring body, and the bottom end head compression section and the middle section compression distance section, and the top end head compression section and the middle section compression distance section all form a deformation section.

2. The relief spring adapted for use in an automatic drug delivery device according to claim 1, wherein: the compression spring body is positioned in the gap of the deformation section and is larger than the gaps of the bottom end head pressed section, the top end head pressed section and the middle section pressed distance section.

3. The relief spring adapted for use in an automatic drug delivery device according to claim 1, wherein: the compression spring body is positioned at the bottom end head compression section, the top end head compression section and the middle section compression distance section, and a joint contact surface is formed.

4. The relief spring adapted for use in an automatic drug delivery device according to claim 1, wherein: and the end of the compression spring body is provided with an arc chamfer.

5. The relief spring adapted for use in an automatic drug delivery device according to claim 1, wherein: the cross section of the compression spring body is oval or rectangular.

6. The relief spring adapted for use in an automatic drug delivery device according to claim 1, wherein: and a marking area is arranged on the compression spring body.

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