CN215309242U - Pen cap anti-drop structure for self-administration device - Google Patents

Abstract

The utility model relates to a pen cap anti-falling structure for a self-administration device, which comprises a device body, wherein a lower pen shell is arranged on the device body, a frustrating shell is arranged in the lower pen shell, a pen cap is sleeved at an opening at the lower end of the lower pen shell, the pen cap comprises a cap body, a limiting inner sleeve is arranged in the cap body, a front end accommodating space is formed inside the limiting inner sleeve, a wrapping wall is arranged on the outer side of the cap body, which is positioned in the limiting inner sleeve, a connecting guide sheet extends on the limiting inner sleeve in a mirror image manner, an anti-falling assembly is arranged on the outer side of the connecting guide sheet, and a resisting assembly is arranged at the lower end of the inner wall of the frustrating shell. From this, the clear accomodating of safety helmet is realized to spacing endotheca of accessible, and laminates smoothly with the cap for brush, unnecessary rocking can not appear. Rely on linking up the guide piece, can let the cap of a writing brush and the lower extreme of the shell of defeating realize interim screens, let the terminal surface of the shell of writing brush down possess suitable combination with the terminal surface of the cap of a writing brush, the user need apply appropriate external force, just can let the cap of a writing brush separate from the shell of defeating.

Description

Pen cap anti-drop structure for self-administration device

Technical Field

The present invention relates to a combination of a pen cap of a self-administration device with a device body and an internal auxiliary member thereof, and more particularly, to a pen cap anti-falling structure for a self-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 auto-injectors, are known in which the trailing end of the device is positioned with a cap simply by interference fit. Of course, there are also combinations that use a threaded manner. However, such a cap has the following problems during use:

1. if the friction force for combining the pen cap needs to be increased, a plurality of structures need to be additionally arranged, the manufacturing cost of the pen cap is increased, certain difficulty exists in pulling out the pen cap, and poor use experience is easily caused for users who lack use experience.

2. If the screw thread mode is adopted, the rotation and the release of the pen cap can be realized only by two hands, and the operation is not very convenient.

In view of the above-mentioned drawbacks, the present inventors have made active research and innovation to create a pen cap anti-falling structure for a self-administration device, which has industrial application value.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, an object of the present invention is to provide a pen cap anti-falling structure for a self-administration device.

The utility model relates to a pen cap anti-falling structure for a self-administration device, which comprises a device body, wherein a lower pen shell is arranged on the device body, a frustrating shell is arranged in the lower pen shell, and a pen cap is sleeved at an opening at the lower end of the lower pen shell, wherein: the pen cap comprises a cap body, wherein a limiting inner sleeve is arranged in the cap body, a front-end accommodating space is formed inside the limiting inner sleeve, a wrapping wall is arranged on the outer side, located on the limiting inner sleeve, of the cap body, a connecting guide piece extends in a mirror image mode on the limiting inner sleeve, an anti-falling assembly is arranged on the outer side of the connecting guide piece, a resisting assembly is arranged at the lower end of the inner wall of the frustrating shell, when the pen cap is combined with the lower shell, the connecting guide piece is upwards inserted into the lower shell from the bottom of the frustrating shell and contacts with the inner wall of the lower shell, and the anti-falling assembly contacts with the resisting assembly.

Further, foretell oneself is cap of a pen anticreep formula structure for device, wherein, support the position subassembly and be for supporting a sand grip, support the upper end of a sand grip and seted up the spacing groove, anticreep subassembly is the anticreep lug, cap of a pen combines with lower shell, the anticreep lug imbeds in the spacing groove.

Furthermore, the pen cap anti-drop structure for the self-administration device is characterized in that contact inclined planes are distributed at the bottom of the limiting groove.

Furthermore, the pen cap anti-drop structure for the self-administration device is provided, wherein the anti-drop projection is in a trapezoidal structure.

Furthermore, the above-mentioned pen cap anti-drop structure for self-administration device, wherein the upper end of the abutting convex strip is provided with an abdicating inclined plane.

Furthermore, in the above pen cap anti-drop structure for the self-administration device, a plurality of guiding convex strips are distributed on the outer wall of the limiting inner sleeve, and guiding grooves are distributed at the corresponding positions of the lower end surface of the frustrating shell.

Still further, foretell self-administration device is with cap of a pen anticreep formula structure, wherein, the outside of parcel wall is provided with a plurality of anti-skidding mechanisms, anti-skidding mechanism is spacing recess, or, anti-skidding mechanism is spacing sand grip.

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

1. the safety cap can be smoothly stored through the limiting inner sleeve, and is smoothly attached to the pen cap, so that unnecessary shaking cannot occur.

2. Rely on linking up the guide piece, can let the cap of a writing brush and the lower extreme of the shell of defeating realize interim screens, let the terminal surface of the shell of writing brush down possess suitable combination with the terminal surface of the cap of a writing brush, the user need apply appropriate external force, just can let the cap of a writing brush separate from the shell of defeating.

3. The pen cap can be prevented from unnecessarily rotating by means of the mutual matching of the guiding convex strips and the guiding grooves.

4. The whole structure is simple, the conventional self-supply device can be transformed, and the implementation is easy.

5. The design of no parts is adopted, a new independent part is not required to be additionally arranged, and the storage pressure of the inner space of the self-administration device can not be caused.

6. The pen cap has a proper anti-skidding effect, so that the pen cap can be pulled out by applying force during use conveniently, and the use difficulty caused by the existence of the anti-falling assembly can be avoided.

6. The combination mode is simple, and the pen cap can be pinched by a thumb and an index finger, so that the separation operation of a single hand is realized.

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 view of the underlying internal structure of the frustrating enclosure.

Fig. 2 is a partial sectional structural schematic diagram of the pen cap.

Fig. 3 is a combination schematic diagram of the pen cap, the lower pen shell and the frustration shell.

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

1 lower pen case 2 frustrating case

3 cap 4 spacing inner sleeve

5 wrapping wall 6 connecting guide sheet

7 abutting convex strip 8 limiting groove

9 anti-drop lug 10 abdication inclined plane

11 leading convex strip 12 anti-skid mechanism

13 safety helmet 14 guiding groove

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.

Like the self-administration device of fig. 1 to 3 with cap of a pen anticreep formula structure, including the device body, be provided with down shell 1 on the device body, be provided with frustrating shell 2 in the shell 1 down, the lower extreme opening part cover of shell 1 is equipped with cap of a pen 3 down, and its distinctive and distinctive part lies in: the pen cap 3 adopted by the utility model comprises a cap body, wherein a limiting inner sleeve 4 is arranged in the cap body, and a front end accommodating space is formed inside the limiting inner sleeve 4. Thus, when the pen cap 3 is combined with the lower pen shell 1, the storage of the safety cap 13 on the PFS assembly can be facilitated. During implementation, the cap body is provided with a wrapping wall 5 on the outer side of the limiting inner sleeve 4, and the wrapping wall is used for being in proper interference fit with the lower pen shell 1, so that the pen cap 3 can be combined with the lower pen shell 1 in a better manner when the pen cap is not in use. And, mirror image extension has linking guide piece 6 on the spacing endotheca 4, links up the outside of guide piece 6 and is provided with the anticreep subassembly. Correspondingly, the lower end of the inner wall of the frustrating shell 2 is provided with a resisting component. From this, cap for brush 3 combines with lower shell for brush 1, links up in guide piece 6 upwards inserts lower shell for brush 1 from the bottom of frustrating shell 2, and with the contact of lower shell for brush 1 inner wall. Meanwhile, the anti-falling component is contacted with the abutting component.

In a preferred embodiment of the present invention, the abutting component is an abutting convex strip 7, and a limit groove 8 is disposed at an upper end of the abutting convex strip 7. Correspondingly, the anti-falling component is an anti-falling lug 9, and when the pen cap 3 is combined with the lower pen shell 1, the anti-falling lug 9 is embedded into the limiting groove 8. Specifically, the bottom of the limiting groove 8 adopted by the utility model is distributed with contact inclined planes. Meanwhile, the anti-drop projection 9 is of a trapezoidal structure. Thus, when the pen cap 3 is in a non-use state, the anti-falling lug 9 with the trapezoidal structure just abuts against the contact inclined plane to which the frustrating shell 2 belongs, and the limiting groove 8 can apply an inward extrusion force to the anti-falling lug 9 by relying on the moderate expansion deformation of the limiting groove 8, so that the pen cap 3 is firmly buckled at the lower end of the lower pen shell 1. In addition, considering that the anti-falling-off protrusion 9 on the pen cap 3 can be smoothly guided into the limiting groove 8 during installation, the upper end of the abutting convex strip 7 is provided with a receding inclined surface 10. Therefore, even if the assembly deviates, the abutting convex strips 7 still can be further advanced through the moderate guidance of the yielding inclined planes 10 and fall into the limiting grooves 8, and the fault tolerance rate of the assembly is improved.

Further, in order to effectively buckle the inner limiting sleeve 4 to the helmet 13 and prevent the unstable combination caused by the improper deformation due to the matching stress during the assembly, the utility model distributes a plurality of guiding convex strips 11 on the outer wall of the inner limiting sleeve 4. Meanwhile, the lower end surface of the frustrating shell 2 is distributed with a guiding groove 14 at the corresponding position. Like this, when cap 3 and frustrate shell 2 combination, through leading positive convex strip 11 and the cooperation of leading positive groove 14, can realize suitable foolproof guide, realize more accurate combination assembly. Meanwhile, the pen cap can be prevented from unnecessarily rotating by means of the mutual matching of the guide convex strips and the guide grooves.

Still further, considering the convenience of holding and pinching during the use of the user and the convenience of taking off the pen cap 3 before the use, the utility model is provided with a plurality of anti-skid mechanisms 12 on the outer side of the wrapping wall 5, and the anti-skid mechanisms 12 are limiting grooves. Of course, the anti-skid mechanism 12 may also be formed by using a limiting convex strip in consideration of some special processing requirements.

The working principle of the utility model is as follows:

when the whole self-administration device is assembled and in a non-use state, the pen cap 3 is butted with the lower pen shell 1. During assembly, the engagement guide tabs 6 on the cap 3 are inserted upwardly into the lower housing 1 from the bottom of the frustrating housing 2. The anti-dropping lug 9 on the connecting guide piece 6 slides down to the limit groove 8 on the abutting convex strip 7 along the same direction and abuts against the limit groove 8. Simply put, the limiting groove 8 is equivalent to a U-shaped fork, and the abutting convex strip 7 is just erected in the U-shaped fork and is limited, so that the frustrating shell 2 can firmly clamp the pen cap 3. Meanwhile, when the pen cap 3 needs to be separated for use, a user only needs to hold the pen cap 3 and can separate the pen cap 3 through normal force application without adopting a specific operation mode.

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

1. the safety cap can be smoothly stored through the limiting inner sleeve, and is smoothly attached to the pen cap, so that unnecessary shaking cannot occur.

2. Rely on linking up the guide piece, can let the cap of a pen and the lower extreme of the shell of defeating realize interim screens, let the terminal surface of the shell of a pen down possess suitable combination with the terminal surface of the cap of a pen, the user need apply appropriate external force, just can let the cap of a pen separate from the shell of defeating

3. The pen cap can be prevented from unnecessarily rotating by means of the mutual matching of the guiding convex strips and the guiding grooves.

4. The whole structure is simple, the conventional self-supply device can be transformed, and the implementation is easy.

5. The design of no parts is adopted, a new independent part is not required to be additionally arranged, and the storage pressure of the inner space of the self-administration device can not be caused.

6. The pen cap has a proper anti-skidding effect, so that the pen cap can be pulled out by applying force during use conveniently, and the use difficulty caused by the existence of the anti-falling assembly can be avoided.

7. The combination mode is simple, and the pen cap can be pinched by a thumb and an index finger, so that the separation operation of a single hand is realized.

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 (7)

1. Self-service device is with cap of a pen anticreep formula structure, including the device body, be provided with down the shell on the device body, be provided with the shell of defeating down in the shell of a pen, the lower extreme opening part cover of shell of a pen is equipped with cap of a pen, its characterized in that down: the pen cap comprises a cap body, wherein a limiting inner sleeve is arranged in the cap body, a front-end accommodating space is formed inside the limiting inner sleeve, a wrapping wall is arranged on the outer side, located on the limiting inner sleeve, of the cap body, a connecting guide piece extends in a mirror image mode on the limiting inner sleeve, an anti-falling assembly is arranged on the outer side of the connecting guide piece, a resisting assembly is arranged at the lower end of the inner wall of the frustrating shell, when the pen cap is combined with the lower shell, the connecting guide piece is upwards inserted into the lower shell from the bottom of the frustrating shell and contacts with the inner wall of the lower shell, and the anti-falling assembly contacts with the resisting assembly.

2. The cap detachment prevention structure for a self-medication delivery device according to claim 1, wherein: the anti-falling pen cap is characterized in that the abutting assembly is an abutting convex strip, a limiting groove is formed in the upper end of the abutting convex strip, the anti-falling assembly is an anti-falling convex block, and the anti-falling convex block is embedded into the limiting groove when the pen cap is combined with the lower pen shell.

3. The cap detachment prevention structure for a self-medication delivery device according to claim 2, wherein: and contact inclined planes are distributed at the bottom of the limiting groove.

4. The cap detachment prevention structure for a self-medication delivery device according to claim 2, wherein: the anti-falling lug is of a trapezoidal structure.

5. The cap detachment prevention structure for a self-medication delivery device according to claim 2, wherein: the upper end of the abutting convex strip is provided with an abdicating inclined plane.

6. The cap detachment prevention structure for a self-medication delivery device according to claim 1, wherein: the outer wall of the limiting inner sleeve is distributed with a plurality of guiding convex strips, and the lower end face of the frustrating shell is distributed with guiding grooves at corresponding positions.

7. The cap detachment prevention structure for a self-medication delivery device according to claim 1, wherein: the outside of parcel wall is provided with a plurality of anti-skidding mechanisms, anti-skidding mechanism is spacing recess, or, anti-skidding mechanism is spacing sand grip.

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