CN113350623A

CN113350623A - PFS limiting structure suitable for self-administration device

Info

Publication number: CN113350623A
Application number: CN202110810379.2A
Authority: CN
Inventors: 熊长艳; 何四现; 杜嘉文; 易林川
Original assignee: Suzhou Jiashu Biomedical Technology Co ltd
Current assignee: Suzhou Jiashu Biomedical Technology Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2021-09-07

Abstract

The invention relates to a PFS limiting structure suitable for a self-administration device, which comprises an upper pen shell, wherein an assembly penetrating channel is arranged in the upper pen shell, the front end of the upper pen shell forms a contact end, a plurality of auxiliary pressure applying assemblies are distributed on the inner wall of the front end of the upper pen shell, and the lower ends of the auxiliary pressure applying assemblies are exposed out of the contact end; or the lower end of the auxiliary pressure applying component is flush with the contact end; or the lower end of the auxiliary pressing assembly is lower than the contact end, the auxiliary pressing assembly is a Z-shaped elastic sheet and comprises a middle section, an upward turning folded sheet extends from the upper end of the middle section, a downward turning folded sheet extends from the lower end of the middle section, and the upward turning folded sheet is connected with the inner wall of the front end of the upper pen shell. From this, rely on the existence of supplementary subassembly of exerting pressure, can carry out appropriate the exerting pressure to the tail end of FPS subassembly, ensure that the FPS subassembly can not appear rocking after the assembly finishes, and be convenient for bear subsequent percussion stress, ensure that the FPS subassembly can not be cracked, guarantee safe in utilization.

Description

PFS limiting structure suitable for self-administration device

Technical Field

The invention relates to an elastic limit structure for a self-administration device, in particular to a PFS limit structure suitable for the 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.

However, conventional self-administration devices such as auto-injectors and the like have a certain clearance in that the tail end of the PFS assembly cannot be effectively restrained due to more or less assembly and manufacturing errors. In this way, not only does there be a sloshing during transport, which can cause misalignment of the parts fired. More importantly, due to the existence of the gap, the percussion hammer is easy to be impacted excessively when in use. At present, the conventional PFS components mainly adopt silica glass, and the PFS components are cracked after being subjected to excessive impact, so that the dosing cannot be finished, and certain use risk exists. Moreover, even if the 202011110579.9 mode is adopted, the PFS component is limited by a plurality of additional components, the assembly process is complex, the requirement on the assembly process is high, and the tolerance rate is low. Meanwhile, the existing automatic injector also utilizes the flexible characteristic of silica gel of the cushion pad to form the cushion pad as a PFS component protection component. However, this approach still does not avoid the possibility of assembly tolerances, or the possibility of gaps. The cushion requires a plurality of auxiliary instruments to realize the positioning of the cushion when being assembled, and the PFS component is easy to generate unnecessary interference when being placed, thereby influencing the placement of the PFS component. Moreover, the assembly process is still complicated, which affects the production.

In view of the above-mentioned drawbacks, the present designer has made active research and innovation to create a PFS limiting structure suitable for a self-administration device, so that the PFS limiting structure has industrial application value.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a PFS stopper structure suitable for a self-administration device.

The invention relates to a PFS limiting structure suitable for a self-administration device, which comprises an upper pen shell, wherein: the inner wall of the front end of the upper pen shell is distributed with a plurality of auxiliary pressure applying assemblies, and the lower ends of the auxiliary pressure applying assemblies are exposed out of the contact end; or the lower end of the auxiliary pressure applying component is flush with the contact end; or the lower end of the auxiliary pressure applying assembly is lower than the contact end, the auxiliary pressure applying assembly is a Z-shaped elastic sheet and comprises a middle section, an upward turning folded sheet extends from the upper end of the middle section, a downward turning folded sheet extends from the lower end of the middle section, and the upward turning folded sheet is connected with the inner wall of the front end of the upper pen shell.

Further, the above PFS limiting structure for a self-administration device, wherein stress releasing grooves are distributed on the zigzag spring plate.

Furthermore, the PFS limiting structure for the self-administration device is suitable for a self-administration device, wherein a plurality of reinforcing bars are distributed at the middle section of the zigzag elastic sheet.

Furthermore, the PFS limiting structure for the self-administration device is suitable for a self-administration device, wherein the edge of the zigzag spring is provided with a circular arc chamfer.

Further, the PFS restraining structure for a self-administration device is described above, wherein the middle section is a planar structure or an arc structure.

Furthermore, the PFS limiting structure for a self-administration device as described above, wherein the lower end surface of the downward-folded flap is a contact surface, and an auxiliary pressing member is disposed outward of the contact surface, and the auxiliary pressing member is a convex point or a convex strip.

Still further, the above PFS limiting structure for a self-administration device, wherein the bumps are distributed singly or in several distributions; the convex strips are distributed in a single strip or a plurality of strips.

By the scheme, the invention at least has the following advantages:

1. by means of the auxiliary pressing assembly, the tail end of the FPS assembly can be pressed properly, the FPS assembly is guaranteed not to shake after being assembled, subsequent firing stress is convenient to bear, the FPS assembly is guaranteed not to be broken, and use safety is guaranteed.

2. The auxiliary extrusion component is arranged independently, so that gaps possibly existing due to assembly and manufacturing tolerance can be filled, the '0' gap placement of the FPS assembly is realized, and the occurrence of percussion fragmentation is avoided.

3. By adopting the structure of the Z-shaped elastic sheet, proper elasticity can be applied to the Z-shaped elastic sheet, external elastic deformation can be effectively borne, the using effect is good, and the Z-shaped elastic sheet cannot be easily cracked.

4. Can be used together with various conventional self-administration devices at present, and can relate to various automatic injectors, insulin injectors and the like, and has wide application range.

5. The pen holder is simple in integral structure, can form a complete whole with the pen holder, facilitates manufacture of an integral type, can meet convenient and fast assembly, does not need to add extra parts, and can also transform the pen holder commonly used at present, and is convenient to implement.

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 overall structure diagram of the upper pen shell.

FIG. 2 is a schematic structural view of the upper housing and PFS assembly.

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

1 upper shell and 2 middle section

3 upward folding piece and 4 downward folding piece

5 stress relief groove 6 auxiliary extrusion component

7 PFS assembly

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 invention but are not intended to limit the scope of the invention.

Fig. 1 to 2 show a PFS stopper structure for a self-administration device, which includes a pen casing 1, and is distinguished in that: in consideration of the assembly requirement of the subsequent firing assembly, in order to reserve a preset space and be beneficial to subsequent modular installation, an assembly penetrating channel is arranged in the upper pen shell 1. At the same time, the front end of the upper housing 1 constitutes the contact tip in order to be able to achieve the necessary stop for the rear end of the PFS assembly 7 during use. Specifically, the inner wall of the front end of the upper pen shell 1 is distributed with a plurality of auxiliary pressure applying components, and the lower ends of the auxiliary pressure applying components are exposed out of the contact end heads. Of course, the PFS component 7 aiming at different lines realizes the limit and meets the requirement of inosculated accommodation, and the lower end of the adopted auxiliary pressure-applying component is flush with the contact end. Alternatively, the lower end of the auxiliary pressure applying assembly is lower than the contact tip. In addition, in order to overcome the tolerance existing during the manufacturing and assembling process, the tail end of the PFS component 7 can completely abut against the auxiliary pressure applying component, the whole body is formed into a whole, the percussion stress can be effectively transmitted, the phenomenon that the PFS component 7 is broken due to too much stress impact caused by the gap existing between the lower end of the upper pen shell 1 and the tail end of the PFS component 7 is avoided, and the auxiliary pressure applying component is a Z-shaped elastic sheet. Specifically, the Z-shaped elastic sheet comprises a middle section 2, an upper turning folding sheet 3 extends from the upper end of the middle section 2, a lower turning folding sheet 4 extends from the lower end of the middle section 2, and the upper turning folding sheet 3 is connected with the inner wall of the front end of the upper pen shell 1. Therefore, certain elastic deformation can be applied by depending on the shape of the Z-shaped elastic sheet for filling the assembly gap possibly existing, so that the tail end of the PFS component 7 is firmly propped against.

In a preferred embodiment of the present invention, stress releasing grooves 5 are distributed on the zigzag spring. Therefore, the maximum elastic deformation can be realized, and different assembly tolerances can be filled. Meanwhile, the cracking caused by local over-stress can be avoided. Certainly, aiming at some special use requirements, a plurality of reinforcing strips can be distributed on the middle section 2 of the Z-shaped elastic sheet. Therefore, the device has better stress effect and bears the large thrust brought by the instant firing. In addition, in order to avoid scratching other components and avoid friction blocking to the running of the firing mechanism, the edge of the Z-shaped elastic sheet adopted by the invention is provided with an arc chamfer.

Further, the intermediate section 2 employed in the present invention is of planar configuration in order to carry the appropriate deformation stresses. Of course, the intermediate section 2 may also be of a cambered configuration, allowing for appropriate give-off for other administration sets, facilitating its smooth arrival at the tail section of the PFS set 7.

Still further, in order to effectively cope with a small tolerance gap and ensure the limit contact of the PFS assembly 7, the lower end surface of the lower folded piece 4 is a contact surface, the contact surface is provided with an auxiliary extrusion member 6 facing outward, and the auxiliary extrusion member 6 is a convex point or a convex strip. Specifically, for PFS assemblies 7 with different tail end structures, the bumps used in the present invention may be distributed singly or in several distributions. Similarly, the raised strips are distributed in a single strip or a plurality of strips, so that different contact areas can be possessed.

The working principle of the invention is as follows:

along with the installation of the PFS component 7, the upper end and the edge part thereof are subjected to deformation pressure from the Z-shaped elastic sheet, so that the PFS component 7 is ensured not to shake. More importantly, the zigzag spring can be fully pressed against the tail end of the PFS assembly 7, ensuring that there is no gap that could cause undue shock. Thus, the force applied by the firing assembly can be effectively carried during use, and the PFS assembly made of silica glass can not be cracked. In addition, the invention adopts a plurality of Z-shaped elastic sheets, the PFS component 7 can be inserted from top to bottom during assembly, the large deformation taking piece is provided, the component cannot be cracked, the assembly convenience is improved, and the PFS component 7 can be automatically reset after being assembled in place.

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

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 invention 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 invention.

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

1. The utility model provides a spacing structure of PFS suitable for self-administration device, including last shell, its characterized in that: the inner wall of the front end of the upper pen shell is distributed with a plurality of auxiliary pressure applying assemblies, and the lower ends of the auxiliary pressure applying assemblies are exposed out of the contact end; or the lower end of the auxiliary pressure applying component is flush with the contact end; or the lower end of the auxiliary pressure applying assembly is lower than the contact end, the auxiliary pressure applying assembly is a Z-shaped elastic sheet and comprises a middle section, an upward turning folded sheet extends from the upper end of the middle section, a downward turning folded sheet extends from the lower end of the middle section, and the upward turning folded sheet is connected with the inner wall of the front end of the upper pen shell.

2. A PFS restraining structure adapted for use in a self-administration device according to claim 1, wherein: stress releasing grooves are distributed on the Z-shaped elastic sheet.

3. A PFS restraining structure adapted for use in a self-administration device according to claim 1, wherein: and a plurality of reinforcing strips are distributed at the middle section of the Z-shaped elastic sheet.

4. A PFS restraining structure adapted for use in a self-administration device according to claim 1, wherein: and the edge of the Z-shaped elastic sheet is provided with an arc chamfer.

5. A PFS restraining structure adapted for use in a self-administration device according to claim 1, wherein: the middle section is of a plane structure or an arc surface structure.

6. A PFS restraining structure adapted for use in a self-administration device according to claim 1, wherein: the lower end face of the downward-turning folding piece can form a contact face, an auxiliary extrusion component is arranged outside the contact face, and the auxiliary extrusion component is a convex point or a convex strip.

7. A PFS limiting formation for a self-administration device according to claim 6, wherein: the salient points are distributed singly or are distributed in a plurality of ways; the convex strips are distributed in a single strip or a plurality of strips.