Injection pen

Abstract

The utility model belongs to the technical field of injection pens, and particularly relates to an injection pen which comprises a pen body. The excitation piece is arranged at the tail end of the pen body; the excitation sleeve is inserted into the front end of the pen body, and the head of the excitation sleeve extends out of the pen body; the push rod sleeve is arranged at the rear end of the pen body, a push rod body is arranged in the push rod sleeve, an excitation spring is arranged between the push rod body and the push rod sleeve, a fastener is arranged at the tail end of the push rod body, and the fastener is suitable for locking the push rod body and the push rod sleeve; the push rod sleeve abuts against the excitation sleeve, when the excitation sleeve is pressed into the pen body, the push rod sleeve is driven to slide towards the tail end of the pen body, and when the push rod sleeve slides to abut against the excitation piece, the excitation piece is suitable for releasing the locking state of the fastener and the push rod sleeve so that the push rod body can be excited; in short, during use, the pen body is directly pressed, the fastener at the end of the push rod body can be unlocked from the push rod sleeve, medicine injection is completed, injection steps are reduced, and medicine injection is completed in emergency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection pen technical field, concretely relates to an injection pen. BACKGROUND

[0002] Injection pen is a kind of medical equipment for subcutaneous injection of drug, its design aims at simplifying drug injection process, improves the compliance and drug convenience of patient, simultaneously reduces the fear and anxiety of self-injection;The existing injection pen usually needs to adjust dose first when using, then takes down pen cap, and injection needle is pierced into skin, finally, injection mechanism is pressed to complete injection;But when emergency occurs, patient needs to inject quickly, the injection procedure of the existing injection pen is complicated, and it is easy to cause danger.

[0003] Therefore, how to avoid that patient cannot inject quickly when emergency occurs is the technical problem urgently to be solved in the field.

[0004] It should be noted that the above information disclosed in the background section is only used to understand the background of the present application, therefore, the above description is not considered as the information of prior art. CONTENT OF UTILITY MODEL

[0005] The present application provides at least an injection pen.

[0006] In a first aspect, the present application provides an injection pen, comprising: a pen body; a trigger member arranged at the tail end of the pen body; a trigger sleeve inserted into the front end of the pen body, and the head of the trigger sleeve extends out of the pen body; a push rod sleeve arranged at the rear end of the pen body, the push rod sleeve is provided with a push rod body, a trigger spring is arranged between the push rod body and the push rod sleeve, the tail end of the push rod body is provided with a buckle, and the buckle is suitable for locking the push rod body and the push rod sleeve; the push rod sleeve abuts against the trigger sleeve, and when the trigger sleeve is pressed into the pen body, the push rod sleeve slides to the tail end of the pen body, wherein when the push rod sleeve abuts against the trigger member, the trigger member is suitable for releasing the locking state of the buckle and the push rod sleeve, so that the push rod body is triggered.

[0007] In an optional embodiment, the tail end of the push rod sleeve is provided with a through hole; the buckle is a plurality of elastic buckles, the elastic buckles are integrally arranged at the end of the push rod body, the elastic buckles are inserted into the through hole and stopped at the outer end face of the push rod sleeve; when the push rod sleeve abuts against the trigger member, the elastic buckles are deformed inward, and the push rod body is triggered.

[0008] In an alternative embodiment, the elastic buckle is arranged along the axis of the push rod body, and the head of the elastic buckle is provided with a tapered surface; the trigger is in the shape of a cylinder, and a trigger hole is formed in the trigger, which is coaxial with the axis of the push rod body; when the push rod sleeve abuts against the trigger, the trigger hole extrudes the tapered surface of the elastic buckle, the elastic buckle deforms inwardly, and the push rod body is triggered.

[0009] In an alternative embodiment, the opening of the trigger hole is provided with an inclined angle.

[0010] In an alternative embodiment, an annular groove is formed in the push rod body, the trigger spring is arranged in the annular groove, and the two ends of the trigger spring abut against the groove bottom of the annular groove and the inner end surface of the push rod sleeve, respectively.

[0011] In an alternative embodiment, an end cap is arranged at the tail end of the pen body; the tail end of the push rod sleeve is provided with a supporting ring, a return spring is sleeved on the supporting ring, and the two ends of the return spring abut against the push rod sleeve and the end cap, respectively.

[0012] In an alternative embodiment, the diameter of the through hole is greater than or equal to the diameter of the trigger hole.

[0013] In an alternative embodiment, the front end of the through hole is provided with a guide surface which matches the tapered surface of the elastic buckle.

[0014] In an alternative embodiment, the front end of the pen body is provided with a pen cap, and a medicine bottle assembly is arranged in the pen body; the trigger is arranged in the end cap, and a trigger sleeve is sleeved on the outside of the medicine bottle assembly to cover the injection needle of the medicine bottle assembly; when the push rod body is triggered, the push rod body pushes the rubber plug of the medicine bottle assembly to inject medicine.

[0015] In an alternative embodiment, the inner wall of the pen body is provided with a directional block, and the sidewall of the push rod sleeve is provided with a directional groove which matches the directional block to position the circumferential position of the push rod sleeve.

[0016] The beneficial effects of the utility model are that the injection pen extends the head of the trigger sleeve out of the pen body, directly presses the pen body after the pen body is placed at the injection position, the trigger sleeve drives the push rod sleeve to slide relative to the pen body, the buckle at the end of the push rod body is unlocked from the push rod sleeve, the push rod body is finally triggered, the injection steps are reduced, and the injection of medicine is completed in an emergency.

[0017] The other features and advantages of the present application will be described in the following description and become apparent from the description, or can be learned from practice of the present application. The objectives and other advantages of the present application can be achieved and obtained by means of the structures particularly pointed out in the description, the claims, and the accompanying drawings.

[0018] In order to make the above objectives, features and advantages of the present application more apparent, a preferred embodiment is described herein, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 A perspective view of an injection pen provided by the present disclosure embodiment is provided.

[0021] Figure 2 A cross-sectional view of an injection pen provided by the present disclosure embodiment is provided.

[0022] Figure 3 A structural schematic view of a push rod sleeve and a fastener provided by the present disclosure embodiment is provided.

[0023] Figure 4 A perspective view of an excitation sleeve and a push rod sleeve provided by the present disclosure embodiment is provided.

[0024] Figure 5 A working process diagram of an injection pen provided by the present disclosure embodiment is provided.

[0025] In the drawings:

[0026] 1, pen body; 11, directional block;

[0027] 2, end cover; 21, excitation piece; 21a, excitation hole; 21b, bevel;

[0028] 3, pen cap;

[0029] 4, excitation sleeve;

[0030] 5, push rod sleeve; 51, through hole; 51a, guide surface; 52, support ring; 53, return spring; 54, directional slot;

[0031] 6, push rod body; 61, annular groove; 62, excitation spring; 63, fastener; 63a, elastic buckle;

[0032] 7, medicine bottle assembly; 71, injection needle; 72, rubber plug. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the utility model will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0034] In this document, when it is mentioned that a first component is on a second component, it can mean that the first component can be formed directly on the second component, or a third component can be interposed between the first component and the second component. In addition, in the drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0035] The terminology used herein is for the purpose of describing particular example configurations only and is not intended to be limiting. As used herein, the singular articles "a," "an," and "the" can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps can be employed.

[0036] As used herein, the phrases "in an embodiment," "according to an embodiment," "in some embodiments," and the like generally mean the particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of the present disclosure. Thus, features, structures, or characteristics can be included in more than one embodiment of the present disclosure, and therefore the phrases "in an embodiment," "according to an embodiment," "in some embodiments," and the like are not necessarily referring to the same embodiment. As used herein, the terms "for example," "e.g.," "for instance," and the like are utilized to merely indicate an example of something, and are not utilized to limit the thing to the example. Any embodiment, aspect or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments, aspects or designs. Rather, the term "example" is intended to indicate a non-limiting example, and the term "exemplary" is intended to indicate an example for teaching purposes. It is discovered that the injection pen in the prior art needs to adjust the dose, take off the pen cap, prick the skin, and press the injection multiple steps, which cannot be quickly injected in an emergency, which is the problem and purpose to be solved by the utility model.

[0037] Based on the above research, the injection pen of the embodiment of the present disclosure is provided, the head of the activation sleeve is extended out of the pen body, and the pen body is directly pressed after the cap is removed, and the shell completes the injection.

[0038] The defects of the above solutions are the results of the practical research of the utility model person, and therefore, the discovery process of the above problems and the solutions of the present disclosure to the above problems should be the contributions of the utility model person to the present disclosure in the process of the present disclosure.

[0039] It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0040] Some embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0041] Referring to Figures 1 to 5 , an injection pen is shown, which comprises a pen body 1, an activation member 21 arranged at the tail end of the pen body 1, an activation sleeve 4 inserted into the front end of the pen body 1, and the head of the activation sleeve 4 extending out of the pen body 1, a push rod sleeve 5 arranged at the rear end of the pen body 1, a push rod body 6 arranged in the push rod sleeve 5, an activation spring 62 arranged between the push rod body 6 and the push rod sleeve 5, a buckle 63 arranged at the tail end of the push rod body 6, the buckle 63 being adapted to lock the push rod body 6 and the push rod sleeve 5, the push rod sleeve 5 abutting against the activation sleeve 4, and when the activation sleeve 4 is pressed into the pen body 1, the push rod sleeve 5 is driven to slide to the tail end of the pen body 1, wherein when the push rod sleeve 5 slides to abut against the activation member 21, the activation member 21 is adapted to release the locking state of the buckle 63 and the push rod sleeve 5, so that the push rod body 6 is activated. In short, the head of the activation sleeve 4 extends out of the pen body 1, the pen body 1 is directly pressed after being placed at the injection position during use, the activation sleeve 4 drives the push rod sleeve 5 to slide relative to the pen body 1, the buckle 63 at the end of the push rod body 6 is unlocked from the push rod sleeve 5, the push rod body 6 is finally activated, the injection steps are reduced, and the injection of the medicament is completed in an emergency.

[0042] In some embodiments, the tail end of the push rod sleeve 5 is provided with a through hole 51; the fastener 63 is a plurality of elastic buckles 63a which are integrally arranged at the end of the push rod body 6, the elastic buckles 63a are inserted into the through hole 51 and stopped at the outer end surface of the push rod sleeve 5; when the push rod sleeve 5 abuts against the trigger 21, the elastic buckles 63a are deformed inwardly, and the push rod body 6 is triggered; in short, the front end of the push rod sleeve 5 is provided with an opening, so that the push rod body 6 pushes the rubber plug 72 of the medicine bottle assembly 7 after being triggered to inject medicine, the tail end of the push rod sleeve 5 is provided with a through hole 51 to insert the push rod body 6, and the tail end of the elastic buckle 63a is buckled at the outer end surface of the through hole 51, when the push rod sleeve 5 abuts against the trigger 21, the elastic buckle 63a is deformed inwardly, and the buckling is released to unlock the push rod body 6.

[0043] In some embodiments, the elastic buckles 63a are arranged around the axis of the push rod body 6, and the head of the elastic buckle 63a is provided with a tapered surface; the trigger 21 is in the shape of a column, and the trigger 21 is provided with a trigger hole 21a coaxial with the axis of the push rod body 6; when the push rod sleeve 5 abuts against the trigger 21, the trigger hole 21a extrudes the tapered surface of the elastic buckle 63a, the elastic buckle 63a is deformed inwardly, and the push rod body 6 is triggered; in short, the trigger 21 is a pin column integrally arranged on the end cover 2, the axis of the trigger 21 is provided with a trigger hole 21a, when the push rod sleeve 5 abuts against the trigger 21, the trigger hole 21a extrudes the tapered surface of the elastic buckle 63a to deform the elastic buckle 63a inwardly, release the buckling with the through hole 51, and unlock the push rod body 6 to complete the injection.

[0044] In some embodiments, the aperture of the trigger hole 21a is provided with an inclined angle 21b; in short, the aperture of the trigger hole 21a is provided with an inclined angle 21b to avoid linear contact with the tapered surface of the elastic buckle 63a, and to ensure stable unlocking of the elastic buckle 63a.

[0045] In some embodiments, the push rod body 6 is provided with an annular groove 61, the trigger spring 62 is arranged in the annular groove 61, and the two ends of the trigger spring 62 abut against the groove bottom of the annular groove 61 and the inner end surface of the push rod sleeve 5, respectively; in short, the trigger spring 62 is arranged in the annular groove 61, which can make the push rod body 6 always have a tendency to slide to the front end of the pen body 1, so that the push rod body 6 can stably push the rubber plug 72 of the medicine bottle assembly 7 after being unlocked.

[0046] In some embodiments, an end cap 2 is further included and arranged at the tail end of the pen body 1; a support ring 52 is arranged at the tail end of the push rod sleeve 5, and a return spring 53 is sleeved on the support ring 52, and the two ends of the return spring 53 abut against the push rod sleeve 5 and the end cap 2 respectively; in short, the end cap 2 is pressed at the tail end of the pen body 1, the tail end of the push rod sleeve 5 is provided with the support ring 52 to sleeve the return spring 53, and the two ends of the return spring 53 abut against the push rod sleeve 5 and the end cap 2 respectively, so that the push rod sleeve 5 always has a tendency to slide towards the front end of the pen body 1; when the pressure applied to the pen body 1 is cancelled, the return spring 53 can push the push rod sleeve 5 to slide towards the front end of the pen body 1, and drive the trigger sleeve 4 to reset, so as to re-cover the injection needle 71.

[0047] In some embodiments, the aperture of the through hole 51 is greater than or equal to the aperture of the trigger hole 21a; in short, the elastic buckle 63a is buckled at the end face of the through hole, and a too small through hole 51 can cause the elastic buckle 63a to be unable to be pressed well by the trigger hole 21a.

[0048] In some embodiments, the front end of the through hole 51 is provided with a guide surface 51a matched with the tapered surface of the elastic buckle 63a; in short, the front end of the through hole 51 is provided with the guide surface 51a matched with the tapered surface of the elastic buckle 63a, so that when the push rod body 6 is installed, the elastic buckle 63a can be guided by the guide surface 51a to smoothly slide into the through hole 51.

[0049] In some embodiments, the front end of the pen body 1 is provided with a pen cap 3, and a medicine bottle assembly 7 is arranged in the pen body 1; the trigger 21 is arranged in the end cap 2, the trigger sleeve 4 is sleeved outside the medicine bottle assembly 7 to cover the injection needle 71 of the medicine bottle assembly 7; when the push rod body 6 is triggered, the push rod body 6 pushes the rubber plug 72 of the medicine bottle assembly 7 to inject medicine; in short, the trigger sleeve 4 is sleeved outside the medicine bottle assembly 7 to protect the injection needle 71, and when the pen cap 3 is pulled out, it is ensured that the injection needle 71 will not be exposed; in use, the injection pen is placed at a designated position, the trigger sleeve 4 abuts against the position to be injected, the pen body 1 is pressed, the trigger sleeve 4 drives the push rod sleeve 5 to slide upwards relative to the pen body 1, the injection needle 71 penetrates into the designated position, at the same time, the push rod sleeve 5 abuts against the trigger 21, the push rod body 6 impacts the rubber plug 72 of the medicine bottle assembly 7 after being unlocked to complete the injection, and after the injection is completed, the pressure applied to the pen body 1 is cancelled, the pen body 1 slides upwards to take out the injection needle 71, and the trigger sleeve 4 covers the injection needle 71.

[0050] In some embodiments, the inner wall of the pen body 1 is provided with a directional block 11; the side wall of the push rod sleeve 5 is provided with a directional groove 54, the directional groove 54 matches with the directional block 11, so that the circumferential position of the push rod sleeve 5 is positioned; in short, such design makes the push rod sleeve 5 not relatively rotate with the pen body 1 in the transportation process, so that the trigger spring 62 and the reset spring 53 are not activated, and the stable trigger and reset of the injection pen are ensured.

[0051] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, terms such as "first", "second" and other numerical terms are used herein, unless otherwise explicitly indicated herein. Therefore, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0053] Spatially relative terms, such as "inner", "outer", "below", "below", "lower", "upper", "above", and the like, can be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the drawings. In addition to the orientation depicted in the drawings, the spatially relative terms can be intended to cover different orientations of the device in use or operation. For example, if the device in the drawing is turned over, the element described as "below" or "under" the other element or feature will be oriented "above" the other element or feature. Therefore, the example term "below" can cover the upward and downward orientations. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0054] In the above discussion, unless otherwise stated, the terms "about", "approximately", "substantially" and the like, when used in describing a numerical value, mean a variation of + / - 10% of the value.

[0055] With the above ideal embodiments according to the present application as the inspiration, through the above description, the relevant staff can definitely make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. An injection pen, characterized in that, The injection pen comprises: a pen body (1); a trigger (21) arranged at the tail end of the pen body (1); a trigger sleeve (4) inserted into the front end of the pen body (1), and the head of the trigger sleeve (4) extends out of the pen body (1); a push rod sleeve (5) arranged at the rear end of the pen body (1), the push rod sleeve (5) is provided with a push rod body (6) therein, a trigger spring (62) is arranged between the push rod body (6) and the push rod sleeve (5), the tail end of the push rod body (6) is provided with a buckle (63), and the buckle (63) is suitable for locking the push rod body (6) and the push rod sleeve (5); the push rod sleeve (5) abuts against the trigger sleeve (4), when the trigger sleeve (4) is pressed into the pen body (1), the push rod sleeve (5) is driven to slide to the tail end of the pen body (1), wherein when the push rod sleeve (5) slides to abut against the trigger (21), the trigger (21) is suitable for releasing the locking state of the buckle (63) and the push rod sleeve (5), so that the push rod body (6) is triggered.

2. The injection pen according to claim 1, wherein a through hole (51) is arranged at the tail end of the push rod sleeve (5); the buckle (63) is a plurality of elastic buckles (63a) which are integrally arranged at the end of the push rod body (6), the elastic buckles (63a) are inserted into the through hole (51) and are stopped at the outer end surface of the push rod sleeve (5); when the push rod sleeve (5) abuts against the trigger (21), the elastic buckles (63a) are deformed inwardly, and the push rod body (6) is triggered.

3. The injection pen according to claim 2, wherein the elastic buckles (63a) are arranged around the axis of the push rod body (6), and the head of the elastic buckles (63a) is provided with a tapered surface; the trigger (21) is in a columnar shape, and a trigger hole (21a) is arranged in the trigger (21), the trigger hole (21a) is coaxial with the axis of the push rod body (6); when the push rod sleeve (5) abuts against the trigger (21), the trigger hole (21a) extrudes the tapered surface of the elastic buckles (63a), the elastic buckles (63a) are deformed inwardly, and the push rod body (6) is triggered.

4. The injection pen according to claim 3, wherein the aperture of the trigger hole (21a) is provided with an inclined angle (21b).

5. The injection pen according to claim 1, wherein an annular groove (61) is arranged on the push rod body (6), the trigger spring (62) is arranged in the annular groove (61), and the two ends of the trigger spring (62) abut against the groove bottom of the annular groove (61) and the inner end surface of the push rod sleeve (5) respectively.

6. The injection pen according to claim 1, further comprising: an end cover (2) arranged at the tail end of the pen body (1). The tail end of the push rod sleeve (5) is provided with a supporting ring (52), the supporting ring (52) is sleeved with a reset spring (53), and the two ends of the reset spring (53) abut against the push rod sleeve (5) and the end cover (2) respectively.

7. The injection pen of claim 3, wherein, The diameter of the through hole (51) is greater than or equal to the diameter of the trigger hole (21a).

8. The injection pen of claim 3, wherein, The front end of the through hole (51) is provided with a guide surface (51a), and the guide surface (51a) is matched with the tapered surface of the elastic buckle (63a).

9. The injection pen of claim 6, wherein, The front end of the pen body (1) is provided with a pen cap (3), and the pen body (1) is provided with a medicine bottle assembly (7) inside; The trigger (21) is arranged in the end cover (2), and the trigger sleeve (4) is sleeved outside the medicine bottle assembly (7) to cover the injection needle (71) of the medicine bottle assembly (7); When the push rod body (6) is triggered, the push rod body (6) pushes the rubber plug (72) of the medicine bottle assembly (7) to inject medicine.

10. The injection pen of claim 9, wherein, The inner wall of the pen body (1) is provided with a directional block (11); The side wall of the push rod sleeve (5) is provided with a directional groove (54), and the directional groove (54) is matched with the directional block (11) to position the circumferential position of the push rod sleeve (5).

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