CN214860061U - PFS safety helmet failure-prevention cap pulling mechanism suitable for self-administration device - Google Patents

Abstract

The utility model relates to a PFS safety helmet prevents that ineffectiveness pulls out cap mechanism suitable for oneself device of dosing, including lower shell, the lower extreme of lower shell is provided with the injection guide head, is provided with safety helmet guide assembly in the injection guide head, and the lower extreme of lower shell is connected with a cap, and it has linking guide piece to extend on the cap for brush, links up guide piece and safety helmet guide assembly contact. From this, through the mutual cooperation of safety helmet guide assembly, linking guide piece, can realize pen cap, safety helmet, the close coupling between the lower shell under the storage state, possess the gas tightness of preferred, unusual invasion can not appear, ensures the cleanliness factor of injection. When a user pulls out the pen cap, the pen cap and the needle head safety cap can be synchronously pulled out only by applying normal force. Need not to carry out secondary extraction or contact to the safety helmet, can not pollute the syringe needle, avoid the infection that the misoperation caused.

Description

PFS safety helmet failure-prevention cap pulling mechanism suitable for self-administration device

Technical Field

The utility model relates to a guiding mechanism is locked and is extracted to self-administration device especially cap for brush, especially relates to a PFS safety helmet that is applicable to self-administration device prevents that the cap mechanism is extracted to failure.

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. The following problems exist during use:

1. after the pen cap is pulled out, the safety cap needs to be pulled out for the second time for injection, and the operation is not very convenient. Meanwhile, if the operation is not proper, the needle can be polluted, and infection is caused.

2. The combination of the pen cap and the pen body is not very stable, a certain gap exists, the safety cap can not be tightly buckled on the needle head all the time in a non-use state, and pollution invasion is easily caused.

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

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a PFS safety helmet anti-failure cap pulling mechanism suitable for self-administration device.

The utility model discloses a PFS safety helmet failure prevention pulls out cap mechanism suitable for oneself device of dosing, including lower shell, wherein: the lower extreme of lower shell of a writing brush is provided with the injection guide head, be provided with safety helmet guide subassembly in the injection guide head, the lower extreme of lower shell of a writing brush is connected with the cap of a writing brush, it has the linking guide piece to extend on the cap of a writing brush, it contacts with safety helmet guide subassembly to link up the guide piece.

Further, the PFS safety helmet failure-prevention cap pulling mechanism suitable for the self-administration device is characterized in that the safety helmet guiding assembly comprises a pressing strip, and a separation inclined plane is arranged at the lower end of the pressing strip.

Furthermore, the PFS safety helmet failure prevention cap pulling mechanism for the self-administration device is characterized in that the pressing bar is provided with a pressing bump, and the pressing bump is of a trapezoidal structure or an arc structure.

Furthermore, the PFS safety helmet failure prevention cap pulling mechanism for the self-administration device is provided, wherein the inner side of the engaging guiding piece is provided with a cap pulling projection.

Furthermore, the PFS safety cap failure prevention cap pulling mechanism for the self-administration device is described above, wherein a needle head limiting ring is disposed in the injection guiding head.

Furthermore, the PFS safety cap failure prevention cap pulling mechanism suitable for the self-administration device is described above, wherein an observation window is arranged on the lower pen shell, and a contact strip is arranged inward of the observation window.

Furthermore, the above PFS safety cap failure prevention cap pulling mechanism for a self-administration device, wherein a plurality of positioning holes are distributed on the lower pen shell.

Furthermore, the PFS safety helmet cap-pulling-out failure prevention mechanism for the self-administration device is characterized in that the front end of the injection guide head is provided with a deformation groove, and the deformation groove is an arc groove.

Still further, the PFS safety helmet failure prevention cap pulling mechanism suitable for the self-administration device is characterized in that a plurality of auxiliary limiting strips are distributed on the inner wall of the injection guide head.

Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:

1. through the mutual cooperation of safety cap guide subassembly, linking guide piece, can realize pen cap, safety cap, the lower intimate integration between the shell of writing a.

2. When the user extracts the pen cap, the user only needs to apply normal force, the pen cap and the safety cap can be synchronously extracted, the safety cap does not need to be secondarily extracted or contacted, the needle head cannot be polluted, and the infection caused by misoperation is avoided.

3. The pen cap has the advantages of simple integral structure, low implementation cost and the like, and can be implemented by simply transforming the prior pen shell, the prior pen cap and the like.

4. The user operation is convenient, does not need to carry out special operation training, and the universality is better.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

Fig. 1 is a schematic sectional structure diagram of a lower pen shell.

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

Fig. 3 is a combined schematic diagram of the pen cap, the safety cap and the lower pen shell.

Fig. 4 is a schematic diagram of the pen cap taken out together with the safety cap after being pulled out.

Fig. 5 is a combined schematic view of the safety cap and the pen cap after the pen cap is pulled out.

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

1 pen shell 2 injection guide head

3 the cap 4 links up the guide plate

5 pressing strip 6 pressing lug

7-pulling cap bump 8-needle limiting ring

9 contact strip of observation window 10

11 positioning hole 12 deformation groove

13 auxiliary limit strip 14 safety helmet

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to 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.

The PFS safety cap defeat prevention cap-removing mechanism suitable for a self-administration device as shown in fig. 1 to 5 comprises a lower pen case 1, which is distinctive in that: the lower end of the lower pen housing 1 is provided with an injection guide head 2, allowing for proper positioning guidance of the PFS assembly tip. Meanwhile, a plurality of cap pulling guide assemblies are arranged in the injection guide head 2, the lower end of the lower pen shell 1 is connected with a pen cap 3, and a connecting guide sheet 4 extends from the pen cap 3. During preparation, the engagement guide tab 4 is in contact with the helmet guide assembly. Therefore, when the pen cap 3 is taken down, the force can be applied to the safety cap guiding component through the connecting guiding sheet 4, and the safety cap 14 where the end of the PFS component is located is driven to be separated together.

In view of a preferred embodiment of the present invention, the adopted helmet guiding assembly comprises a pressing strip 5, and the lower end of the pressing strip 5 is provided with a separation slope. Therefore, the contact gap caused by tolerance can be filled through the existence of the pressing strip 5, and the connecting guide piece 4 is ensured to be smoothly and fully contacted with the safety helmet 14. Furthermore, the utility model discloses be provided with the lug 6 of exerting pressure on exerting pressure strip 5, the lug 6 of exerting pressure is the trapezoidal structure. Alternatively, for different implementations, a pressing projection 6 with a circular arc structure may also be used. Thus, the engagement guide piece 4 can be further attached to the helmet 14 by the pressing projection 6 during use. Furthermore, the utility model discloses be provided with in the inboard that links up guide piece 4 and pull out cap lug 7. Like this, can let link up the tail end full contact of better and safety helmet 14 of guide piece 4, can let cap 3 drive safety helmet 14 synchronous separation when extracting cap 3.

Further, the utility model discloses be provided with syringe needle spacing ring 8 in injection guide head 2. Therefore, the needle head of the PFS component can be limited, the needle head is perpendicular to an injection surface after being installed in place, and subsequent firing injection is facilitated to be smooth. Simultaneously, consider the convenience that the user used, the utility model discloses be provided with observation window 9 on lower shell 1, know current injection state during the user of being convenient for uses. In addition, in order to realize proper limit for the firing assembly mounted subsequently, a contact strip 10 can be arranged inwards on the observation window 9. Therefore, the assembly gap between the firing assembly and the pit 1 in the lower pen shell can be filled, and the assembly integrity is better.

Combine actual implementation to see, consider follow-up and last shell of a writing brush and the connection cooperation needs of other relevant subassemblies, the utility model discloses it has a plurality of locating holes 11 to distribute on lower shell of a writing brush 1. Simultaneously for the convenience of the user take hold between the fingers cap 3 and exert pressure for injection guide head 2 in can produce the deformation of moderate degree, be convenient for promote frictional stress, the utility model discloses set up tangible deformation groove 12 at injection guide head 2's front end, deformation groove 12 is the circular arc groove.

Further, the utility model discloses it has a plurality of supplementary spacing 13 to distribute at the inner wall of injection guide head 2. Thus, after the PFS assembly is assembled, proper pressure can be applied to the safety cap 14 and the part of the safety cap contacted with the needle, the safety cap 14 is prevented from being loosened under the stress in transportation and other non-use states, the integral air tightness is improved, the invasion of pollutants is prevented, and the injection infection is effectively avoided.

The working principle of the utility model is as follows:

when the lower pen shell 1 and the pen cap 3 are combined, the connecting guide piece 4 on the pen cap 3 is just combined with the cap-pulling guide component at the lower end of the lower pen shell 1 in the injection guide head 2. Specifically, the outer side of the engaging guide piece 4 is attached to the cap pulling guide assembly, and the inner side of the engaging guide piece 4 is attached to the safety cap 14 of the PFS assembly. Like this, pull out the laminating combination that cap guide assembly, link up guide piece 4, safety helmet 14 realized similar "sandwich", possess the gas tightness of preferred, avoid constituting the pollution to the syringe needle. And, the cap-pulling projection 7 in the engaging guide piece 4 is sufficiently contacted with the tail end of the helmet 14.

When the user needs to inject, the user applies an inward pressing force when holding the pen cap 3. During this time, the force is transmitted through the uncapping guide assembly, engaging the guide tab 4. Meanwhile, the cap-pulling convex block 7 is in full contact with the tail end of the safety cap 14, so that a user can conveniently and fast take the safety cap 14 out when pulling the pen cap 3, and convenient and fast cooperative pulling-out is realized.

Through foretell expression of characters and combination of the attached drawing can be seen, adopt the utility model discloses afterwards, possess following advantage:

1. through pulling out the cap guide subassembly, linking mutually supporting of guide piece, can realize pen cap, safety helmet, the lower intimate integration between the shell of writing a brush under the storage state, possess the gas tightness of preferred, unusual invasion can not appear, ensures the cleanliness factor of injection.

2. When the user extracts the pen cap, the user only needs to apply normal force, the pen cap and the safety cap can be synchronously extracted, the safety cap does not need to be secondarily extracted or contacted, the needle head cannot be polluted, and the infection caused by misoperation is avoided.

3. The pen cap has the advantages of simple integral structure, low implementation cost and the like, and can be implemented by simply transforming the prior pen shell, the prior pen cap and the like.

4. The user operation is convenient, does not need to carry out special operation training, and the universality is better.

Furthermore, the indication directions or positional relationships described in the present invention are directions or positional relationships based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated device or structure must have a specific direction or operate in a specific directional configuration, and therefore, 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 limited 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 a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. 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 are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or component so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered 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, and it should be noted that, for those skilled in the art, a plurality of 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 (9)

1. PFS safety helmet that is applicable to self-administration device prevents that failure pulls out cap mechanism, including lower shell, its characterized in that: the lower end of the lower pen shell is provided with an injection guide head, a plurality of cap pulling guide assemblies are arranged in the injection guide head, the lower end of the lower pen shell is connected with a pen cap, a linking guide sheet extends from the pen cap, and the linking guide sheet is in contact with the cap pulling guide assemblies.

2. The PFS safety cap anti-defeat cap-pulling mechanism suitable for use in a self-administration device according to claim 1, wherein: the cap pulling guide assembly comprises a pressing strip, and a separation inclined plane is arranged at the lower end of the pressing strip.

3. The PFS safety cap anti-defeat cap-pulling mechanism suitable for use in a self-administration device according to claim 2, wherein: the pressing strip is provided with a pressing lug which is in a trapezoidal structure, or the pressing lug is in an arc structure.

4. The PFS safety cap anti-defeat cap-pulling mechanism suitable for use in a self-administration device according to claim 1, wherein: the inner side of the connecting guide sheet is provided with a cap-pulling lug.

5. The PFS safety cap anti-defeat cap-pulling mechanism suitable for use in a self-administration device according to claim 1, wherein: a needle head limiting ring is arranged in the injection guide head.

6. The PFS safety cap anti-defeat cap-pulling mechanism suitable for use in a self-administration device according to claim 1, wherein: an observation window is arranged on the lower pen shell, and a contact strip is arranged inwards on the observation window.

7. The PFS safety cap anti-defeat cap-pulling mechanism suitable for use in a self-administration device according to claim 1, wherein: a plurality of positioning holes are distributed on the lower pen shell.

8. The PFS safety cap anti-defeat cap-pulling mechanism suitable for use in a self-administration device according to claim 1, wherein: the front end of the injection guide head is provided with a deformation groove which is an arc groove.

9. The PFS safety cap anti-defeat cap-pulling mechanism suitable for use in a self-administration device according to claim 1, wherein: and a plurality of auxiliary limiting strips are distributed on the inner wall of the injection guide head.

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