CN212854244U

CN212854244U - Disposable injection pen and feedback assembly thereof

Info

Publication number: CN212854244U
Application number: CN201921920494.XU
Authority: CN
Inventors: 王述芳; 任梦强; 罗来荣
Original assignee: Jiangsu Wanhai Medical Devices Co ltd
Current assignee: Jiangsu Wanhai Medical Devices Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2021-04-02
Anticipated expiration: 2029-11-08

Abstract

The utility model relates to a disposable injection pen and feedback subassembly thereof, it includes feedback subassembly and feeds back a section of thick bamboo and feedback ring gear including feeding back the subassembly, the feedback is located between pushing away section of thick bamboo and the push rod rotary drum, the feedback is close to feedback ring gear side and has the feedback ring gear even a section of thick bamboo, the both sides of feedback ring gear all have the feedback ring gear, the inner wall of push rod rotary drum has the ring gear, the feedback ring gear makes corresponding side feedback ring gear and ring gear meshing or break away from when its axial displacement is followed to the feedback ring gear, and the feedback ring gear of feedback ring gear opposite side links the feedback ring gear meshing or breaking away from on the section of thick bamboo with the feedback, the feedback is even the inner wall of a section of thick bamboo. The utility model discloses three part linkage is beating when adjusting to big scale direction, reaches the same effect with original structure, and when the reversal carries out the return adjustment, only links by an upper feedback section of thick bamboo on upper portion and feedback even section of thick bamboo and beats, stirs the feedback stability, and internals can not take place to follow the commentaries on classics, can avoid following the injection volume that the commentaries on classics arouses inaccurate, reduces the potential safety hazard.

Description

Disposable injection pen and feedback assembly thereof

Technical Field

The utility model relates to an injection device technical field, concretely relates to disposable injection pen and feedback assembly thereof.

Background

The disposable injection pen is a common medical appliance which can be used for household and is commonly used for injecting insulin, the specific structure of the disposable injection pen is shown in the prior patent CN 209332900U of the company, but the poking feedback of the injection pen in the actual use has certain problems, the inside of the disposable injection pen can rotate when the injection amount is set, the connecting rod advances to extrude the liquid medicine, the waste is generated, the dosage of the liquid medicine injection amount of a patient is also generated, and certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a feedback subassembly uses the feedback of stirring of back injection pen on disposable injection pen stable, and internals can not take place to follow the commentaries on classics, avoids injection dosage to receive the influence, the potential safety hazard that can significantly reduce.

The second purpose of the utility model is to provide a disposable injection pen stirs the feedback during use and stabilizes, and internals can not take place to follow the commentaries on classics, avoids injection dosage to receive the influence, the potential safety hazard that can significantly reduce.

In order to realize the first purpose, the first technical solution of the present invention is: the utility model provides a feedback assembly, includes a feedback section of thick bamboo, a feedback section of thick bamboo and feedback ring gear even, the lower part of going up a feedback section of thick bamboo with a feedback section of thick bamboo upper portion offsets even, the feedback is close to feedback ring gear side and has a feedback ring gear even a section of thick bamboo, the both sides of feedback ring gear all have a feedback ring gear, and the feedback ring gear of its corresponding side with the feedback ring gear on the feedback section of thick bamboo cooperatees even.

In the above technical scheme, the upper feedback cylinder is provided with a spring placing groove, and a compression spring is arranged in the placing groove.

In order to achieve the first purpose, the second technical solution of the present invention is: an injection pen, comprising the above feedback assembly, further comprising: the medicine bin is provided with at least one discharge hole; a screw configured to be movable in a linear direction to push the material in the cartridge out of the discharge port; a pusher drum configured to reciprocate toward and away from the cartridge; the push cylinder is provided with a linkage poking ring; wherein the pushing cylinder is configured to drive the linkage poking ring to rotate in a first direction when the pushing rod rotary cylinder moves towards the direction close to the medicine bin, the linkage poking ring is configured to drive the screw rod to move in the linear direction when the pushing rod rotary cylinder rotates in the first direction, the pushing cylinder further comprises a fixed support, the outer wall of the pushing rod rotary cylinder is in threaded connection with the inner wall of the fixed support, the inner wall of the pushing rod rotary cylinder is in transmission connection with the pushing cylinder through a feedback component, the feedback component is positioned between the pushing cylinder and the pushing rod rotary cylinder, the side of the feedback connecting cylinder close to the feedback gear ring is provided with a feedback gear ring, the inner wall of the pushing rod rotary cylinder is provided with an inner gear ring, the feedback gear ring moves along the axial direction of the feedback gear ring to enable the feedback gear ring on the corresponding side to be meshed with or separated from the inner gear ring, and the feedback gear ring on the other side, the inner wall of the feedback connecting cylinder is connected with the outer wall of the push cylinder in a sliding mode through a concave-convex structure.

In the above technical scheme, the injection pen further comprises a scale drum sleeved on the push rod rotary drum, the scale drum is connected with the push rod rotary drum, and scales are arranged on the outer wall of the scale drum.

In the above technical scheme, the injection pen comprises a pen body tube, the medicine bin is fixedly connected with one end of the pen body tube, and the pen body tube is far away from one end of the medicine bin, which is provided with an observation hole.

In the technical scheme, the medicine bin is provided with a bayonet, and the inner wall of the pen body tube is provided with a clamping block corresponding to the bayonet.

In the technical scheme, the pen barrel is further provided with a fixed seat, the fixed seat is matched with the linkage shifting ring, the screw rod penetrates through the fixed seat, a limiting convex rib is arranged on the fixed seat, and the limiting convex rib is matched with a protrusion on the inner wall of the pen barrel.

In the technical scheme, one end of the push rod rotary drum, which is far away from the medicine bin, is connected with a button, and the button can be retracted into the push rod rotary drum.

In the technical scheme, the inner wall of the feedback connecting cylinder is provided with the guide bar, the outer wall of the push cylinder is provided with the guide groove corresponding to the guide bar, and the guide bar is arranged in the guide groove.

In the technical scheme, the inner wall surface of the fixed support is provided with an internal thread.

The utility model has the advantages that: the utility model discloses change the feedback section of thick bamboo in original injection pen into present feedback subassembly, the feedback subassembly is by last feedback section of thick bamboo, the feedback is even a section of thick bamboo and feedback ring gear triplex is constituteed, three part is linking when adjusting to big scale direction and is beating, reach the same effect with original structure, and when the reversal is carried out the return-adjustment, only link by the last feedback section of thick bamboo on upper portion and feedback and beat, stir the feedback stably, the inside part can not take place to follow the commentaries on classics, the injection volume that can avoid following the commentaries on classics and arouse is inaccurate, the potential safety hazard that significantly reduces.

Drawings

FIG. 1 is a perspective view of an injection pen according to the present invention;

FIG. 2 is a schematic cross-sectional view of an injection pen according to the present invention;

FIG. 3 is a schematic structural view of the housing and feedback assembly;

FIG. 4 is a schematic structural diagram of a scale drum, a push rod of a fixed support and a rotating drum;

FIG. 5 is a schematic structural view of a pusher, a screw and a cartridge;

fig. 6 is a schematic perspective view of the feedback assembly of the present invention;

fig. 7 is a schematic cross-sectional view of the feedback assembly of the present invention;

fig. 8 is a schematic perspective view of the fixing base of the present invention;

fig. 9 is a schematic perspective view of the button of the present invention;

fig. 10 is a schematic cross-sectional view of the fixing bracket of the present invention.

The reference numbers are as follows: a medicine bin 100; a discharge port 110; a bayonet 120; a vial 130; a screw 200; a pusher piston 210; a pusher drum 300; a button 310; a push cylinder 400; a linkage dial ring 410; a fixing bracket 500; an internal thread 510; a feedback component 600; an upper feedback cartridge 610; the spring placement groove 611; a hold-down spring 612; a feedback linkage 620; a feedback gear ring 630; a feedback ring gear 640; a scale drum 700; a barrel 800; a pen cap 810; a fixture 820; a fixing base 900; a limit rib 910.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be clearly and clearly defined.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 6 and 7, a feedback assembly comprises an upper feedback cylinder 610, a feedback connecting cylinder 620 and a feedback toothed ring 630, wherein the lower part of the upper feedback cylinder 610 abuts against the upper part of the feedback connecting cylinder 620, the feedback connecting cylinder 620 is provided with a feedback toothed ring 640 at the side close to the feedback toothed ring 639, the feedback toothed ring 630 is provided with feedback toothed rings 640 at both sides, and the feedback toothed ring 630 at the corresponding side is matched with the feedback toothed ring 630 on the feedback connecting cylinder 620.

As shown in fig. 6 and 7, the upper feedback cylinder 610 has a spring placement groove 611, and a compression spring 612 is installed in the spring placement groove, and the compression spring 612 always provides a downward pushing force to the feedback assembly 600 to ensure the engagement of the lower feedback ring gear 640.

As shown in fig. 1 to 9, an injection pen includes the feedback assembly, and further includes: a cartridge 100 provided with at least one discharge port 110; a screw 200 configured to move in a linear direction to push the material in the cartridge 100 out of the discharge port 110; a pusher drum 300 configured to reciprocate toward and away from the cartridge 100; a pusher 400 having a linked thumb ring 410; wherein the pusher 400 is configured to drive the linked dial ring 410 to rotate in a first direction when the push rod rotary drum 300 moves in a direction close to the medicine bin 100, the linked dial ring 410 is configured to drive the screw 200 to move in the linear direction when rotating in the first direction, the medicine bin further comprises a fixed support 500, the outer wall of the push rod rotary drum 300 is in threaded connection with the inner wall of the fixed support 500, the inner wall of the push rod rotary drum 300 is in transmission connection with the pusher 400 through a feedback assembly 600, the feedback assembly 600 is positioned between the pusher 400 and the push rod rotary drum 300, the feedback connecting drum 620 is provided with a feedback gear ring 640 at a side close to the feedback gear ring 630, the inner wall of the push rod rotary drum 300 is provided with an inner gear ring, the feedback gear ring 630 moves along the axial direction thereof to enable the feedback gear ring 640 at a corresponding side to be engaged with or disengaged from the inner gear ring, and the feedback gear ring 630 at the other side of the feedback gear ring 630 is engaged with the feedback gear ring 640 on the feedback Or the feedback connecting cylinder 620 is separated from the pushing cylinder 400, and the inner wall of the feedback connecting cylinder 620 is connected with the outer wall of the pushing cylinder 400 in a sliding mode through a concave-convex structure.

As shown in fig. 1 and 4, the push rod rotating drum further includes a scale drum 700 sleeved on the push rod rotating drum 300, the scale drum 700 is connected with the push rod rotating drum 300, and scales are arranged on an outer wall of the scale drum 700.

As shown in fig. 1 and 3, the medical pen further comprises a pen barrel 800, the drug bin 100 is fixedly connected with one end of the pen barrel 800, an observation hole is formed in one end of the pen barrel 800, which is far away from the drug bin 100, and a pen cap 810 is sleeved on the other end of the pen barrel 800, so that the drug bottle 130 is firstly loaded into the drug bin 100 during use, and then the drug bin 100 is fixed on the pen barrel 800.

As shown in fig. 5, a bayonet is provided on the drug bin 100, a fixture block 820 corresponding to the bayonet 120 is provided on the inner wall of the pen barrel 800, and in the past, the fixation of the drug bin 100 and the pen barrel 800 adopts a convex rib and a slot way, and the convex rib is inserted along the slot and then rotated to realize locking, but the connection is unstable, and slight shaking occurs during use, which affects the injection of a patient.

As shown in fig. 5, fixing base 900 still has, fixing base 900 is dialled the ring 410 with the linkage and is cooperateed, screw rod 200 passes fixing base 900 and tip are equipped with and are pushed away material piston 210, spacing protruding muscle 910 has on the fixing base 900, spacing protruding muscle 910 cooperatees with the arch on the pen body pipe 800 inner wall, in the past because injection pen disposable uses, fixing base 900 only adopts the tight fit to fix, uses the easy pine of fixing base 900 after a period and takes off and can take place to rock, influences patient's use experience greatly.

As shown in fig. 1 and 9, a button 310 is connected to an end of the pusher drum 300 away from the cartridge 100, the button 310 can be retracted into the pusher drum 300, and an annular catch is provided at a lower portion of the button 310 to catch the button 310 when the button 310 is in an extracted state.

As shown in fig. 2 and 7, the inner wall of the feedback connecting cylinder 620 has a guide bar 621, the outer wall of the push cylinder 400 has a guide groove corresponding to the guide bar 621, the guide bar 621 is installed in the guide groove, and the arrangement of the guide bar 621 and the guide groove ensures that the feedback assembly 600 and the push cylinder 400 do not rotate relatively.

As shown in fig. 6 and 7, the cross section of the teeth on the feedback ring gear 640 is a right triangle, so that the slope of one slope surface of the teeth is much larger than that of the other slope surface, the teeth on the adjacent feedback ring gear 640 directly slide along the right-angle side from disengagement to re-engagement, and the sound generated by the impact is more obvious.

As shown in fig. 10, the inner wall surface of the fixing bracket 500 is provided with an inner thread 510, in the conventional design, a thread is generally arranged on the periphery of the scale drum 700, so that the scale drum 700 can be screwed in and out, but in the practical use, since the scale drum 700 can be screwed out, dust may fall into the thread, which prevents injection from affecting the accuracy of injection dosage, and has a great potential safety hazard, and the thread is arranged in the scale drum 700, so that dust can be greatly prevented from entering.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A feedback assembly, characterized by: the feedback gear ring is arranged on the two sides of the feedback gear ring, and the feedback gear ring on the corresponding side of the feedback gear ring is matched with the feedback gear ring on the feedback connecting cylinder.

2. The feedback assembly of claim 1, wherein: the upper feedback cylinder is provided with a spring placing groove, and a compression spring is arranged in the placing groove.

3. A disposable injection pen is characterized in that: a feedback assembly comprising any of claims 1-2, further comprising: the medicine bin is provided with at least one discharge hole; a screw configured to be movable in a linear direction to push the material in the cartridge out of the discharge port; a pusher drum configured to reciprocate toward and away from the cartridge; the push cylinder is provided with a linkage poking ring; wherein the pushing cylinder is configured to drive the linkage poking ring to rotate in a first direction when the pushing rod rotary cylinder moves towards the direction close to the medicine bin, the linkage poking ring is configured to drive the screw rod to move in the linear direction when the pushing rod rotary cylinder rotates in the first direction, the pushing cylinder further comprises a fixed support, the outer wall of the pushing rod rotary cylinder is in threaded connection with the inner wall of the fixed support, the inner wall of the pushing rod rotary cylinder is in transmission connection with the pushing cylinder through a feedback component, the feedback component is positioned between the pushing cylinder and the pushing rod rotary cylinder, the side of the feedback connecting cylinder close to the feedback gear ring is provided with a feedback gear ring, the inner wall of the pushing rod rotary cylinder is provided with an inner gear ring, the feedback gear ring moves along the axial direction of the feedback gear ring to enable the feedback gear ring on the corresponding side to be meshed with or separated from the inner gear ring, and the feedback gear ring on the other side, the inner wall of the feedback connecting cylinder is connected with the outer wall of the push cylinder in a sliding mode through a concave-convex structure.

4. The disposable injection pen of claim 3, wherein: the push rod rotary drum is characterized by further comprising a scale drum sleeved on the push rod rotary drum, the scale drum is connected with the push rod rotary drum, and scales are arranged on the outer wall of the scale drum.

5. The disposable injection pen of claim 3, wherein: still include a barrel, the medicine storehouse with barrel one end fixed connection, the barrel is kept away from medicine storehouse one end has been seted up and has been observed the hole.

6. The disposable injection pen of claim 5, wherein: the medicine bin is provided with a bayonet, and the inner wall of the pen body tube is provided with a clamping block corresponding to the bayonet.

7. The disposable injection pen of claim 4, wherein: the pen body is characterized by further comprising a fixing seat, the fixing seat is matched with the linkage shifting ring, the screw penetrates through the fixing seat, a limiting convex rib is arranged on the fixing seat, and the limiting convex rib is matched with a protrusion on the inner wall of the pen body tube.

8. The disposable injection pen of claim 3, wherein: one end of the push rod rotary drum, which is far away from the medicine bin, is connected with a button, and the button can be retracted into the push rod rotary drum.

9. The disposable injection pen of claim 3, wherein: the inner wall of the feedback connecting cylinder is provided with a guide strip, the outer wall of the push cylinder is provided with a guide groove corresponding to the guide strip, and the guide strip is arranged in the guide groove.

10. The disposable injection pen of claim 3, wherein: and internal threads are arranged on the inner wall surface of the fixed support.