Pen-injector

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, concretely relates to a pen type syringe, and the pen type syringe comprises: a pen body barrel, a pair of avoidance grooves are arranged in the inner wall of the pen body barrel; a lower fixing is arranged in the pen body barrel, the lower surface of the lower fixing is provided with a pair of fixed arms, and the fixed arms are located at the inner side of the corresponding avoidance grooves; a pen core frame is internally provided with a containing cavity for placing a medicine bottle; the interval of the two fixed arms is less than the diameter of the medicine bottle; when the pen core frame is connected with the pen body barrel, the pen core frame is suitable for driving the medicine bottle to extrude the fixed arms, the fixed arms are forced to expand outward to enter the avoidance grooves, the pen type syringe sets two fixed arms on the lower fixing, so that when the pen core frame is connected with the pen body barrel, the medicine bottle extrudes the two fixed arms to prevent shaking, meanwhile, the avoidance grooves are arranged in the inner wall of the pen body barrel, so that the fixed arms enter the avoidance grooves when expanding outward under pressure, thereby preventing the fixed arms from extruding the pen body barrel to make it "out of round".

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to syringes, and more particularly to a pen-type syringe. Background Technology

[0002] A pen injector is a pre-filled medication injection device that resembles a pen in shape. It is primarily used by patients who require frequent, long-term subcutaneous self-injections, greatly simplifying the injection process and improving the convenience, accuracy, and privacy of medication administration.

[0003] A pen-type syringe includes at least: a pen holder for holding a medicine bottle, and a pen body as an outer shell. After the medicine bottle is filled into the pen holder, the pen holder needs to be connected to the pen body.

[0004] In related technologies, in order to prevent the medicine bottle from shaking, a constriction is set inside the pen body, so that the medicine bottle abuts against the constriction, thereby preventing shaking; however, in the implementation of the above structure, since the pen body of the pen syringe is made of plastic, it will deform when squeezed by the medicine bottle, resulting in "out-of-roundness".

[0005] Therefore, how to solve the technical problem of "out-of-roundness" of the pen body is a problem that urgently needs to be solved by those skilled in the art.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0007] This disclosure provides at least one pen-type injector.

[0008] In a first aspect, embodiments of this disclosure provide at least one pen-type syringe, comprising: a pen body barrel having a pair of clearance grooves on its inner wall; a lower fixing unit disposed within the pen body barrel, the lower surface of the lower fixing unit having a pair of fixing arms, the fixing arms being located inside the corresponding clearance grooves; a pen refill holder having a receiving cavity for placing a medicine bottle; the upper side wall of the pen refill holder having a pair of notches; wherein the notches are used to expose the medicine bottle within the receiving cavity; when the pen refill holder is connected to the pen body barrel, the fixing arms are adapted to extend into the corresponding notches to limit the medicine bottle.

[0009] In one optional embodiment, a pair of ribs are provided on the upper side wall of the pen refill holder; wherein a pair of limiting grooves are provided on the inner wall of the pen body; when the pen refill holder is connected to the pen body, the ribs are located in the corresponding limiting grooves.

[0010] In one alternative embodiment, the inner wall of the fixed arm has a pair of limiting ridges; wherein the limiting ridges are arranged axially; and the lower end of the limiting ridges is provided with a guide slope.

[0011] In one alternative embodiment, the two clearance grooves and the two limiting grooves are arranged orthogonally.

[0012] In one optional embodiment, the side wall of the pen body is provided with an upper limit hole group and a lower limit hole group; the side wall of the lower fixed is provided with a first boss group; the side wall of the pen refill holder is provided with a second boss group; wherein, the lower fixed is engaged with the upper limit hole group through the first boss group, and the pen refill holder is engaged with the lower limit hole group through the second boss group.

[0013] In one optional embodiment, the side wall of the pen refill holder is provided with a dosage indicator line; wherein the dosage indicator line is recessed relative to the outer wall of the pen refill holder.

[0014] In one alternative embodiment, the lower sidewall of the pen refill holder is provided with connecting threads; and / or, the lower sidewall of the pen refill holder is provided with a plurality of inverted "L"-shaped snap-fit ​​platforms.

[0015] In one optional embodiment, the pen-type syringe further includes: a pen cap; a limiting ring on the side wall of the pen refill holder; wherein the limiting ring has at least one arcuate protrusion, the lower end face of the pen body is adapted to the limiting ring, and the upper end face of the pen cap is adapted to the limiting ring.

[0016] In one optional embodiment, the inner wall of the pen cap is provided with at least one slot, and the side wall of the pen refill holder is provided with at least one snap-fit ​​protrusion; wherein when the pen cap is connected to the pen refill holder, the snap-fit ​​protrusion is located in the slot.

[0017] Secondly, the present disclosure also provides at least one pen-type syringe, comprising: a pen body, wherein a pair of clearance grooves are provided on the inner wall of the pen body near the end of the injection needle; a lower fixing, disposed inside the pen body, wherein the lower surface of the lower fixing has a pair of fixing arms, and the fixing arms are located inside the corresponding clearance grooves; and a pen refill holder, wherein a receiving cavity for placing a medicine bottle is provided therein; wherein when the pen refill holder is connected to the pen body, the pen refill holder is adapted to drive the medicine bottle to squeeze the fixing arms, so that the fixing arms are forced to expand outward to enter the clearance grooves.

[0018] The beneficial effects of this utility model are that, by setting two fixed arms on the lower fixed part, the medicine bottle squeezes the two fixed arms to prevent shaking when the pen core holder is connected to the pen body. At the same time, by opening a relief groove on the inner wall of the pen body, the fixed arms enter the relief groove when they are compressed and expand outward, thereby preventing the fixed arms from squeezing the pen body and causing it to "lose its roundness".

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a pen-type syringe provided in an embodiment of the present disclosure; Figure 2 A cross-sectional view of a pen-type syringe provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of a pen body provided in an embodiment of the present disclosure; Figure 4 This is a schematic diagram of a lower-fixed structure provided in an embodiment of the present disclosure; Figure 5 This is a schematic diagram of the structure after the lower fixing is connected to the pen body according to an embodiment of the present disclosure; Figure 6 This is a schematic diagram of a structure in which a medicine bottle is disposed behind a pen refill holder, according to an embodiment of the present disclosure. Figure 7 This is a schematic diagram of the structure of a pen cap provided in an embodiment of this disclosure.

[0023] In the picture: 1. Pen body; 11. Clearance groove; 12. Limiting groove; 13. Upper limit hole group; 14. Lower limit hole group; 2. Lower fixing; 21. Fixing arm; 211. Limiting edge; 212. Guide slope; 22. First boss assembly; 3. Pen refill holder; 31. Receiving cavity; 32. Notch; 33. Rib; 34. Second boss group; 35. Dosage marking line; 36. Connecting thread; 37. Limiting ring; 371. Arc-shaped protrusion; 38. Snap-fit ​​platform; 39. Snap-fit ​​boss; 4. Medicine bottles; 5. Pen cap; 51. Card slot. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the figures, the thickness of parts may be exaggerated or reduced for the purpose of effectively depicting the technical content.

[0026] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] like Figure 1 , Figure 2 As shown, at least one embodiment provides a pen-type syringe, including: a pen body 1, a lower fixing 2, and a pen refill holder 3.

[0028] Specifically, such as Figure 3 As shown, a pair of clearance grooves 11 are provided on the inner wall of the pen body 1.

[0029] Specifically, such as Figure 4 , Figure 5 As shown, the lower fixing 2 is disposed inside the pen body cylinder 1, and the lower surface of the lower fixing 2 has a pair of fixing arms 21, and the fixing arms 21 are located inside the corresponding clearance groove 11.

[0030] Specifically, such as Figure 6 As shown, the pen refill holder 3 is provided with a receiving cavity 31 for placing the medicine bottle 4. When the medicine bottle 4 is placed in the receiving cavity 31, the pen refill holder 3 is connected to the pen body 1 to realize the filling of medicine.

[0031] In this embodiment, by setting the distance between the two fixed arms 21 to be less than the diameter of the medicine bottle 4, the medicine bottle 4 presses against the two fixed arms 21 to prevent wobbling when the pen refill holder 3 is connected to the pen body 1. At the same time, by opening a relief groove 11 on the inner wall of the pen body 1, the fixed arms 21 enter the relief groove 11 when they are compressed and expand outward, thereby preventing the fixed arms 21 from squeezing the pen body 1 and causing it to "lose its roundness".

[0032] like Figure 6As shown, in some embodiments, the upper sidewall of the pen refill holder 3 has a pair of notches 32; wherein the notches 32 are used to expose the medicine bottle 4 in the receiving cavity 31; when the pen refill holder 3 is connected to the pen body 1, the fixing arm 21 is adapted to extend into the corresponding notch 32 to limit the medicine bottle 4.

[0033] In this embodiment, after the upper end of the pen refill holder 3 is inserted into the pen body 1, the fixing arm 21 extends into the notch 32 and is squeezed outward by the medicine bottle 4. The counterforce generated by the outwardly expanding fixing arm 21 is applied to the medicine bottle 4 to prevent the medicine bottle 4 from shaking.

[0034] like Figure 6 As shown, in some embodiments, a pair of ribs 33 are provided on the upper side wall of the pen refill holder 3; a pair of limiting grooves 12 are provided on the inner wall of the pen body cylinder 1; when the pen refill holder 3 is connected to the pen body cylinder 1, the ribs 33 are located in the corresponding limiting grooves 12.

[0035] In this embodiment, when the pen refill holder 3 is inserted into the pen body 1, the rib 33 cooperates with the limiting groove 12 to guide the pen refill holder 3 into insertion; after the pen refill holder 3 is inserted, the rib 33 cooperates with the limiting groove 12 to prevent the pen refill holder 3 from rotating.

[0036] like Figure 4 As shown, in some embodiments, the inner wall of the fixed arm 21 has a pair of limiting ridges 211; wherein the limiting ridges 211 are arranged axially.

[0037] In this embodiment, the distance between the limiting ridge 211 on one fixed arm 21 and the limiting ridge 211 on the other fixed arm 21 is less than the diameter of the medicine bottle 4. That is, when the pen refill holder 3 is connected to the pen body 1, the side wall of the medicine bottle 4 will squeeze the limiting ridge 211, so that the limiting ridge 211 will not shake.

[0038] like Figure 4 As shown, in some embodiments, the lower end of the limiting edge 211 is provided with a guide slope 212.

[0039] In this embodiment, the guide slope 212 enables the limiting edge 211 to be compatible with various sizes of medicine bottles 4; wherein, it is only necessary for the upper edge of the medicine bottle 4 to abut against the guide slope 212.

[0040] like Figure 3 As shown, in some embodiments, the two clearance grooves 11 and the two limiting grooves 12 are arranged orthogonally.

[0041] In this embodiment, the two clearance grooves 11 and the two limiting grooves 12 are arranged orthogonally, so that when the pen body 1 is subjected to force, it is subjected to force in four directions, thereby achieving uniformity as much as possible to avoid losing roundness.

[0042] like Figure 3As shown, in some embodiments, the side wall of the pen body 1 is provided with an upper limit hole group 13 and a lower limit hole group 14.

[0043] like Figure 4 As shown, in some embodiments, the side wall of the lower fixing 2 is provided with a first boss group 22, and the lower fixing 2 is engaged with the upper limit hole group 13 through the first boss group 22.

[0044] In this embodiment, the first boss in the first boss group 22 has an inclined surface on its upper surface, so that after the first boss extends into the lower limiting hole group 14, it can be disengaged by continuing to be subjected to force; at the same time, the lower surface of the first boss is a plane, so that the first boss group 22 cannot be disengaged after being engaged with the upper limiting hole group 13. The pen body cylinder 1 is provided with a limiting surface. When the lower fixing 2 abuts against the limiting surface, the first boss group 22 is engaged with the upper limiting hole group 13.

[0045] like Figure 6 As shown, in some embodiments, the upper sidewall of the pen refill holder 3 is provided with a second boss group 34, and the pen refill holder 3 is engaged with the lower limit hole group 14 through the second boss group 34.

[0046] In this embodiment, the second boss in the second boss group 34 has an upper surface that is inclined and a lower surface that is flat. The inclined surface is to facilitate the insertion of the pen refill holder 3 into the lower limit hole group 14 of the pen body 1, and the flat surface is to prevent the engagement from disengaging.

[0047] like Figure 6 As shown, in some embodiments, the side wall of the pen refill holder 3 is provided with a dosage marking line 35; wherein the dosage marking line 35 is recessed relative to the outer wall of the pen refill holder.

[0048] In this embodiment, the function of the dosage marking line 35 is to facilitate feedback on the remaining volume of medicine in the medicine bottle 4.

[0049] like Figure 6 As shown, in some embodiments, the lower side wall of the pen refill holder 3 is provided with a connecting thread 36.

[0050] In this embodiment, the connecting thread 36 allows the pen refill holder 3 to be connected to the needle using a threaded connection.

[0051] like Figure 6 As shown, in some embodiments, the lower side wall of the pen refill holder 3 is provided with several inverted "L"-shaped snap-fit ​​platforms 38.

[0052] In this embodiment, the snap-fit ​​platform 38 can connect the pen refill holder 3 to the needle using a rotating snap-fit.

[0053] like Figure 1As shown, in some embodiments, the pen injector further includes a pen cap 5.

[0054] like Figure 6 As shown, in some embodiments, the side wall of the pen refill holder 3 has a limiting ring 37; wherein the limiting ring 37 has at least one arcuate protrusion 371, the lower end face of the pen body 1 is adapted to the limiting ring 37, and the upper end face of the pen cap 5 is adapted to the limiting ring 37.

[0055] In this embodiment, the arc-shaped protrusion 371 serves as a guide, i.e., it guides the connection angle of the pen cap 5.

[0056] like Figure 6 , Figure 7 As shown, in some embodiments, the inner wall of the pen cap 5 is provided with at least one slot 51, and the side wall of the pen refill holder 3 is provided with at least one snap-fit ​​protrusion 39; wherein when the pen cap 5 is connected to the pen refill holder 3, the snap-fit ​​protrusion 39 is located in the slot 51.

[0057] At least one embodiment also provides a pen-type syringe, comprising: a pen body 1, wherein a pair of clearance grooves 11 are provided on the inner wall of the pen body 1 near the end of the injection needle; a lower fixing 2, disposed inside the pen body 1, wherein the lower surface of the lower fixing 2 has a pair of fixing arms 21, and the fixing arms 21 are located inside the corresponding clearance grooves 11; and a pen refill holder 3, wherein a receiving cavity 31 for placing a medicine bottle 4 is provided therein; wherein when the pen refill holder 3 is connected to the pen body 1, the pen refill holder 3 is adapted to drive the medicine bottle 4 to squeeze the fixing arms 21, so that the fixing arms 21 are forced to expand outward to enter the clearance grooves 11.

[0058] In summary, this pen-type syringe has two fixing arms 21 on the lower fixing 2 so that when the pen cartridge holder 3 is connected to the pen body 1, the medicine bottle 4 squeezes the two fixing arms 21 to prevent wobbling. At the same time, by opening a relief groove 11 on the inner wall of the pen body 1, the fixing arms 21 can enter the relief groove 11 when they are compressed and expanded outward, thereby preventing the fixing arms 21 from squeezing the pen body 1 and causing it to "lose its roundness".

[0059] In this document, when it is said that the first component is located on the second component, this can mean that the first component can be directly formed on the second component, or that the third component can be inserted between the first component and the second component.

[0060] In this document, when an element or layer is referred to as being “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be an intermediate element or layer.

[0061] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0062] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the apparatus in use or operation.

[0063] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A pen-type syringe, characterized in that, include: The pen body (1) has a pair of clearance grooves (11) on its inner wall near the end of the injection needle. The lower fixing (2) is set inside the pen body (1). The lower surface of the lower fixing (2) has a pair of fixing arms (21), and the fixing arms (21) are located inside the corresponding clearance groove (11). The pen refill holder (3) has a cavity (31) for holding medicine bottles (4). The upper side wall of the pen refill holder (3) has a pair of notches (32); wherein When the pen refill holder (3) is connected to the pen body (1), the fixing arm (21) is adapted to extend into the corresponding notch (32) to limit the medicine bottle (4).

2. The pen-type syringe as described in claim 1, characterized in that, The upper side wall of the pen refill holder (3) is provided with a pair of ribs (33); wherein The inner wall of the pen body (1) is provided with a pair of limiting grooves (12); When the pen refill holder (3) is connected to the pen body (1), the rib (33) is located in the corresponding limiting groove (12).

3. The pen-type syringe as described in claim 2, characterized in that, The inner wall of the fixed arm (21) has a pair of limiting ridges (211); wherein The limiting rib (211) is provided along the axial direction; The lower end of the limiting edge (211) is provided with a guide slope (212).

4. The pen-type syringe as described in claim 3, characterized in that, The two clearance grooves (11) and the two limiting grooves (12) are arranged orthogonally.

5. The pen-type syringe as described in claim 1, characterized in that, The side wall of the pen body (1) is provided with an upper limit hole group (13) and a lower limit hole group (14). The side wall of the lower fixing (2) is provided with a first boss group (22); The pen refill holder (3) has a second boss group (34) on its side wall. The lower fixing (2) is engaged with the upper limit hole group (13) through the first boss group (22), and the pen refill holder (3) is engaged with the lower limit hole group (14) through the second boss group (34).

6. The pen-type syringe as described in claim 1, characterized in that, The side wall of the pen refill holder (3) is provided with a dosage marking line (35); wherein The dosage marking line (35) is recessed relative to the outer wall of the pen refill holder.

7. The pen-type syringe as described in claim 1, characterized in that, The lower end side wall of the pen refill holder (3) is provided with a connecting thread (36). And / or, the lower side wall of the pen refill holder (3) is provided with several inverted "L" shaped snap-fit ​​platforms (38).

8. The pen-type syringe as described in claim 1, characterized in that, Also includes: Pen cap (5); The side wall of the pen refill holder (3) has a limiting ring (37). in The limiting ring (37) has at least one arc-shaped protrusion (371), the lower end face of the pen body (1) is adapted to the limiting ring (37), and the upper end face of the pen cap (5) is adapted to the limiting ring (37).

9. The pen-type syringe as described in claim 8, characterized in that, The inner wall of the pen cap (5) is provided with at least one slot (51), and the side wall of the pen refill holder (3) is provided with at least one snap-fit ​​protrusion (39); wherein When the pen cap (5) is connected to the pen refill holder (3), the snap-fit ​​boss (39) is located in the slot (51).

10. A pen-type syringe, characterized in that, include: The pen body (1) has a pair of clearance grooves (11) on its inner wall near the end of the injection needle. The lower fixing (2) is set inside the pen body (1). The lower surface of the lower fixing (2) has a pair of fixing arms (21), and the fixing arms (21) are located inside the corresponding clearance groove (11). The pen refill holder (3) has a cavity (31) for holding medicine bottles (4); When the pen refill holder (3) is connected to the pen body (1), the pen refill holder (3) is adapted to drive the medicine bottle (4) to squeeze the fixing arm (21), so that the fixing arm (21) is forced to expand outward to enter the clearance groove (11).

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