Medicine pushing assembly and injection pen

Abstract

The utility model belongs to the technical field of injection pens, and particularly relates to a medicine pushing assembly which comprises a medicine pushing rod and a medicine pushing sleeve. The medicine pushing rod is inserted into the medicine pushing sleeve, an elastic buckle is arranged at the top of the medicine pushing rod, and the elastic buckle is arranged in the medicine pushing sleeve in a buckled mode; the medicine pushing rod is provided with a containing annular groove, a medicine pushing spring is arranged in the containing annular groove, and the two ends of the medicine pushing spring abut against the containing annular groove and the medicine pushing sleeve respectively so that the medicine pushing rod can always have the tendency of sliding out of the medicine pushing sleeve. In short, the elastic buckle is arranged at the top of the medicine pushing rod and buckled in the medicine pushing cylinder, when injection is needed, the buckling state of the elastic buckle and the medicine pushing cylinder is unlocked through the unlocking piece, the medicine pushing spring can push the medicine pushing rod, injection is completed, and the situation that personnel need to continuously press the medicine pushing rod is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection pen technical field, concretely relates to a kind of push medicine subassembly and injection pen. BACKGROUND

[0002] Injection pen is a kind of product that medicine and injector are combined, usually including pen body, push medicine subassembly, pen core (medicine bottle assembly) and pen cap, it is simple to operate, safe and convenient, can reduce medicine waste, dose is adjustable, and there is automatic return and visual feedback etc.

[0003] The existing automatic injector, design principle is more complex, many parts, assembly cost is big, and finally product cost is too high.In addition, when firing, due to push medicine trigger subassembly design is unreasonable, leading to push rod misplacement, appear firing delay or firing failure, influence final medicine injection effect.

[0004] Therefore, it is necessary to provide a stable trigger injection device.

[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, the above description is not considered as information of prior art. CONTENT OF UTILITY MODEL

[0006] The present application provides at least a kind of push medicine subassembly and injection pen.

[0007] In a first aspect, the present application provides a push medicine subassembly, comprising: a push medicine rod and a push medicine sleeve;The push medicine rod is inserted into the push medicine sleeve, the top of the push medicine rod is provided with an elastic buckle, and the elastic buckle is buckled in the push medicine sleeve;And the push medicine rod is provided with a placing ring groove, the push medicine spring is arranged in the placing ring groove, and the two ends of the push medicine spring are respectively supported in the placing ring groove and the push medicine sleeve, so that the push medicine rod always has the tendency to slide out of the push medicine sleeve.

[0008] In an alternative embodiment, the push medicine rod includes a push rod and a sleeve cylinder, the elastic buckle is arranged at the top of the push rod, the side wall of the push rod is integrally provided with a plug-in ring, the side wall of the plug-in ring is provided with a plug-in slot, and the plug-in slot penetrates through the bottom surface of the plug-in ring;The sleeve cylinder is sleeved on the side wall of the plug-in ring, and the inner wall of the sleeve cylinder is provided with a plug-in block, the plug-in block is clamped in the plug-in slot;And the placing ring groove is between the side wall of the push rod and the inner wall of the sleeve cylinder.

[0009] In an alternative embodiment, the plug-in slot is three, and is arranged at intervals along the peripheral wall of the plug-in ring, and the plug-in block is correspondingly provided with three.

[0010] In an alternative embodiment, the two insertion slots are identical in shape and symmetrically arranged about the central axis of the other insertion slot.

[0011] In an alternative embodiment, the side wall of the insertion block extends a positioning protrusion to the same side to orient the sleeve cylinder on the insertion ring.

[0012] In an alternative embodiment, the pusher rod and the sleeve cylinder are integrally formed.

[0013] In an alternative embodiment, the top of the pusher sleeve is provided with a through hole, the side wall of the pusher sleeve is provided with a limiting strip, the elastic buckle is buckled in the through hole, one end of the pusher spring abuts against the inner top surface of the pusher sleeve, and the side wall of the pusher rod is provided with a limiting groove which is clamped with the limiting strip to limit the circumferential displacement of the pusher rod.

[0014] In an alternative embodiment, the side wall of the pusher sleeve is provided with a through groove, the side wall of the pusher rod is provided with a hitting block which is adapted to cooperate with the through groove and can slide along the through groove, and when the pusher rod slides down, the hitting block slides to the bottom of the through groove to hit the bottom of the through groove to make a sound.

[0015] In an alternative embodiment, the side wall of the pusher rod is provided with an elastic sheet, the hitting block is arranged at the end of the elastic sheet, and the side wall of the hitting block is obliquely arranged to guide the insertion of the pusher rod into the pusher sleeve.

[0016] In the second aspect, the disclosure also provides an injection pen, comprising a shell and the above-mentioned pusher assembly, and the pusher sleeve is arranged in the shell.

[0017] The pusher assembly of the utility model has the advantages that the elastic buckle is arranged on the top of the pusher rod and buckled in the pusher cylinder, when injection is needed, the buckling state of the elastic buckle and the pusher cylinder is unlocked by the unlocking piece, the pusher spring pushes the pusher rod to complete the injection, and the personnel need not continuously press the pusher rod.

[0018] Other features and advantages of the present utility model will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present utility model. The objects and other advantages of the present utility model will be realized and attained by the structure particularly pointed out in the description and claims of the present utility model as well as the appended drawings.

[0019] In order to make the above-mentioned purpose, characteristics and advantages of the utility model more obvious and easy to understand, the present paper will take a preferred embodiment, and cooperate with the attached drawings, and make a detailed description as follows. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. 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.

[0021] Figure 1 A perspective view of a medicine pushing assembly provided by the embodiment of the present application is provided.

[0022] Figure 2 A sectional view of a medicine pushing assembly provided by the embodiment of the present application is provided.

[0023] Figure 3 A perspective view of a medicine pushing assembly provided by the embodiment of the present application is provided.

[0024] Figure 4 A sectional view of a medicine pushing assembly provided by the embodiment of the present application is provided.

[0025] Figure 5 An exploded view of a pushing rod and a sleeve provided by the embodiment of the present application is provided.

[0026] Figure 6 An exploded view of a pushing rod and a sleeve provided by the embodiment of the present application is provided.

[0027] Figure 7 A structure schematic view of an injection pen provided by the embodiment of the present application is provided.

[0028] Figure 8 A bottom view of a sleeve provided by the embodiment of the present application is provided.

[0029] In the drawings:

[0030] 1, medicine pushing rod;

[0031] 11, pushing rod; 11a, plug-in ring; 11b, plug-in slot;

[0032] 12, sleeve; 12a, plug-in block; 12b, positioning protrusion; 12c, hitting block; 12d, elastic sheet; 12f, limiting slot;

[0033] 13, elastic buckle; 13a, buckle body; 13b, guide arc surface;

[0034] 14, placing ring groove; 15, medicine pushing spring;

[0035] 2, medicine pushing sleeve; 21, through hole; 22, limiting strip; 23, through slot;

[0036] 3, shell. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described below in connection with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0038] In this document, when it is mentioned that a first component is located on a second component, it can mean that the first component can be directly formed 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.

[0039] In this document, example embodiments of the present disclosure will be described in greater detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of" when preceded by terms introducing a list of items, modify the entire list of items rather than individual items in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0040] 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 forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and the like 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.

[0041] As used herein, the phrases “in one embodiment,” “according to one 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, appearances of such phrases in various places in the specification do not necessarily all refer to the same embodiment. As used herein, the terms “example,” “exemplary,” and the like are used as example, instance, or illustration. Any implementation, aspect or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or advantageous over other implementations, aspects or designs. Rather, the use of the terms “example,” “exemplary,” and the like are intended to present concepts in a concrete manner.

[0042] It is found through research that in the prior art, the injection of the injection pen requires personnel to continuously press the medicine pushing rod, and in an emergency, personnel cannot continuously press, which easily leads to danger, which is a problem and purpose to be solved by the utility model.

[0043] Based on the above research, the utility model provides a medicine pushing assembly and injection pen, which are pushed by the medicine pushing spring, and when the elastic buckle is released from the buckling state, the medicine pushing rod can automatically complete the medicine pushing injection.

[0044] The above-mentioned defects are the results of the utility model person after practice and careful research, and therefore, the discovery process of the above-mentioned problems and the solutions provided by the utility model for the above-mentioned problems should be the contributions of the utility model person to the utility model in the process of the utility model.

[0045] It should be noted that similar reference numerals and letters refer to similar items throughout the accompanying drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] Some embodiments of the utility model will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] Referring to Figures 1 to 7The utility model discloses a push medicine assembly, including: push medicine rod 1 and push medicine sleeve 2, push medicine rod 1 is inserted in push medicine sleeve 2, the top of push medicine rod 1 is provided with elastic buckle 13, and elastic buckle 13 is buckled in push medicine sleeve 2, and push medicine rod 1 is provided with the placement ring groove 14, and push medicine spring 15 is arranged in the placement ring groove 14, and the both ends of push medicine spring 15 are respectively supported placement ring groove 14 and push medicine sleeve 2, to make push medicine rod 1 always have the tendency of sliding out push medicine sleeve 2, in short, by setting elastic buckle 13 on the top of push medicine rod 1, and the buckling state of elastic buckle 13 in push medicine cylinder is unlocked by unlocking piece, push medicine spring 15 pushes push medicine rod 1 to complete injection when needing injection, and it avoids the need for personnel to press push medicine rod 1 continuously.

[0048] In some embodiments, the push medicine rod 1 includes a push rod 11 and a sleeve cylinder 12, the elastic buckle 13 is arranged on the top of the push rod 11, the sidewall of the push rod 11 is integrally provided with an insertion ring 11a, the sidewall of the insertion ring 11a is provided with an insertion slot 11b, the insertion slot 11b penetrates through the bottom surface of the insertion ring 11a, the sleeve cylinder 12 is sleeved on the sidewall of the insertion ring 11a, and the inner wall of the sleeve cylinder 12 is provided with an insertion block 12a, the insertion block 12a is clamped in the insertion slot 11b, and the sidewall of the push rod 11 and the inner wall of the sleeve cylinder 12 are the placement ring groove 14, in short, in order to reduce the difficulty of integral injection molding of the push medicine rod 1, the push medicine rod 1 is divided into the push rod 11 and the sleeve cylinder 12, and the sleeve cylinder 12 is sleeved upwards from the bottom of the push rod 11 until the insertion block 12a is clamped in the insertion slot 11b, further, a space is left between the sidewall of the push rod 11 and the inner wall of the sleeve cylinder 12 to form the placement ring groove 14.

[0049] In some embodiments, the insertion slot 11b is three, and is arranged at intervals along the peripheral wall of the insertion ring 11a, and the insertion block 12a is correspondingly provided with three, in short, the insertion slot 11b is arranged on the sidewall of the insertion ring 11a to uniformly support the insertion block 12a.

[0050] In some embodiments, two of the insertion slots 11b are the same shape and are symmetrically arranged about the central axis of the other insertion slot 11b, in short, the insertion slots 11b of the same shape are symmetrically arranged about the central axis of the other insertion slot 11b to ensure that the push rod 11 and the sleeve cylinder 12 can be spliced at a fixed angle.

[0051] In some embodiments, the side wall of the plug block 12a extends a positioning protrusion 12b to the same side, so that the sleeve cylinder 12 is oriented and sleeved on the plug ring 11a; in short, the side wall of the plug block 12a extending a positioning protrusion 12b matches the two plug grooves 11b of the same shape, so that the sleeve cylinder 12 is oriented and sleeved on the plug ring 11a.

[0052] In some embodiments, the medicine pushing rod 1 comprises a pushing rod 11 and a sleeve cylinder 12, which are integrally formed.

[0053] In some embodiments, the top of the medicine pushing sleeve 2 is provided with a through hole 21, and the side wall of the medicine pushing sleeve 2 is provided with a limiting strip 22; the elastic buckle 13 is buckled in the through hole 21, one end of the medicine pushing spring 15 abuts against the inner top surface of the medicine pushing sleeve 2; and the side wall of the medicine pushing rod 1 is provided with a limiting groove 12f, which is clamped with the limiting strip 22 to limit the circumferential displacement of the medicine pushing rod 1; in short, the top of the medicine pushing sleeve 2 is provided with a through hole 21 to complete the buckling of the elastic buckle 13; further, the limiting groove 12f of the side wall of the medicine pushing rod 1 matches the limiting strip 22 of the inner wall of the medicine pushing sleeve 2, so as to ensure that the medicine pushing rod 1 does not rotate when pushing medicine, thereby realizing stable medicine pushing.

[0054] In some embodiments, the side wall of the medicine pushing sleeve 2 is provided with a through groove 23; the side wall of the medicine pushing rod 1 is provided with a hitting block 12c, which is adapted to cooperate with the through groove 23 and can slide along the through groove 23; wherein when the medicine pushing rod 1 slides downward, the hitting block 12c slides to the bottom of the through groove 23 to hit the bottom of the through groove 23 to make a sound; in short, the side wall of the medicine pushing rod 1 is provided with a hitting block 12c, which can hit the bottom of the through groove 23 to make a sound when the medicine pushing rod 1 slides downward to push medicine.

[0055] In some embodiments, the side wall of the medicine pushing rod 1 is provided with an elastic sheet 12d, the hitting block 12c is arranged at the end of the elastic sheet 12d, and the side wall of the hitting block 12c is inclined to guide the insertion of the medicine pushing rod 1 into the medicine pushing sleeve 2; in short, the hitting block 12c is arranged on the side wall of the medicine pushing rod 1 through the elastic sheet 12d, so that when the medicine pushing rod 1 is inserted into the medicine pushing sleeve 2, the hitting block 12c can be displaced inward to avoid interference with the medicine pushing sleeve 2.

[0056] In some embodiments, the elastic buckle 13 comprises at least two buckle bodies 13a, which are arranged in an array on the top of the pushing rod 11 body, and the side wall of the buckle body 13a is provided with a guide arc surface 13b.

[0057] In some embodiments, the side wall of the plug block 12a is inclined, so that the side wall of the plug block 12a and the side wall of the plug slot 11b form a wedge-shaped fit, so that the sleeve cylinder 12 and the plug rod are fastened to each other.

[0058] In a second aspect, the disclosure also provides an injection pen, comprising: a housing 3 and the above-mentioned medicine pushing assembly, and the medicine pushing sleeve 2 is arranged in the housing 3.

[0059] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, 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.

[0060] 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 in this paper, unless otherwise indicated in this paper. Therefore, the above discussed first element, component, area, layer or section can be referred to as the second element, component, area, layer or section without departing from the teachings of the example embodiments.

[0061] Spatially relative terms, such as "inner", "outer", "below", "below", "lower", "above", "upper", 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 above and below 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.

[0062] 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.

[0063] 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. A medicament pushing assembly, characterized in that, The utility model relates to a medicine pushing assembly, which comprises a medicine pushing rod (1) and a medicine pushing sleeve (2). The medicine pushing rod (1) is inserted into the medicine pushing sleeve (2), the top of the medicine pushing rod (1) is provided with an elastic buckle (13), and the elastic buckle (13) is buckled in the medicine pushing sleeve (2); and The medicine pushing rod (1) is provided with a placing ring groove (14), the placing ring groove (14) is provided with a medicine pushing spring (15), and the two ends of the medicine pushing spring (15) abut against the placing ring groove (14) and the medicine pushing sleeve (2) respectively, so that the medicine pushing rod (1) always has a tendency to slide out of the medicine pushing sleeve (2).

2. The medicine pushing assembly according to claim 1, wherein The medicine pushing rod (1) comprises a pushing rod (11) and a sleeve cylinder (12), and the elastic buckle (13) is arranged at the top of the pushing rod (11); The side wall of the pushing rod (11) is integrally provided with an insertion ring (11a), the side wall of the insertion ring (11a) is provided with an insertion groove (11b), and the insertion groove (11b) penetrates through the bottom surface of the insertion ring (11a); The sleeve cylinder (12) is sleeved on the side wall of the insertion ring (11a), and the inner wall of the sleeve cylinder (12) is provided with an insertion block (12a), and the insertion block (12a) is clamped in the insertion groove (11b); and The side wall of the pushing rod (11) and the inner wall of the sleeve cylinder (12) form the placing ring groove (14).

3. The medicine pushing assembly according to claim 2, wherein The insertion groove (11b) is three, which are arranged at intervals along the peripheral wall of the insertion ring (11a), and the insertion block (12a) is provided with three insertion blocks correspondingly.

4. The medicine pushing assembly according to claim 3, wherein Two of the insertion grooves (11b) are the same in shape and are symmetrically arranged about the central axis of the other insertion groove (11b).

5. The medicine pushing assembly according to claim 4, wherein The side wall of the insertion block (12a) extends a positioning protrusion (12b) to the same side, so that the sleeve cylinder (12) is oriented and sleeved on the insertion ring (11a).

6. The medicine pushing assembly according to claim 1, wherein The medicine pushing rod (1) comprises a pushing rod (11) and a sleeve cylinder (12), and the pushing rod (11) and the sleeve cylinder (12) are integrally formed.

7. The medicine pushing assembly according to any one of claims 1-6, wherein The top of the medicine pushing sleeve (2) is provided with a through hole (21), and the side wall of the medicine pushing sleeve (2) is provided with a limiting strip (22); The elastic buckle (13) is buckled in the through hole (21), one end of the medicine pushing spring (15) abuts against the inner top surface of the medicine pushing sleeve (2); and The side wall of the medicine pushing rod (1) is provided with a limiting groove (12f), and the limiting groove (12f) is clamped with the limiting strip (22) to limit the circumferential displacement of the medicine pushing rod (1).

8. The medicine pushing assembly according to claim 7, wherein The side wall of the medicine pushing sleeve (2) is provided with a through groove (23). ​ The side wall of the medicine pushing rod (1) is provided with a hitting block (12c) which is adapted to cooperate with the through groove (23) and can slide along the through groove (23); wherein, When the medicine pushing rod (1) slides downward, the hitting block (12c) slides to the bottom of the through groove (23) to hit the bottom of the through groove (23) to make a sound.

9. The medicine pushing assembly according to claim 8, characterized in that, The side wall of the medicine pushing rod (1) is provided with an elastic sheet (12d), the hitting block (12c) is arranged at the end of the elastic sheet (12d), and the side wall of the hitting block (12c) is arranged obliquely to guide the medicine pushing rod (1) to be inserted into the medicine pushing sleeve (2).

10. An injection pen characterized in that Comprise: The shell (3) and the medicine pushing assembly according to any one of claims 1-9, the medicine pushing sleeve (2) is arranged in the shell (3).

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