Counting structure and injection device thereof

Abstract

The utility model provides a counting structure, which comprises a driving component, a counting component and a counting component, the counting turntable is arranged at the far end of the driving part and is provided with a far side surface, a near side surface connected with the far end of the driving part, a curved surface with scales and a torsion spring for connecting the near side surface of the counting turntable and the far end of the driving part; the far end of the driving part is in sliding connection with the near side face of the counting rotary disc through a sliding groove and a sliding block piece. On the basis of an original injection structure, a mechanical automatic counting function is added, counting can be carried out while injection is operated, operation is simple, and the problem that a patient forgets the number of times in daily injection is solved; and during manufacturing and design, more other parts are not needed for corresponding cooperation, the requirement for manufacturing and assembling precision is low, and the manufacturing difficulty and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the field of injection devices, in particular to a counting structure and an injection device thereof. Background Art

[0002] In the prior art, patients with chronic diseases usually need to inject drugs at home by themselves. For example, patients with diabetes need to inject insulin in time to maintain blood sugar stability. Traditional insulin injection devices are injected subcutaneously, but in actual use, patients need to count the number of injections by themselves. Patients with poor memory are prone to forget the number of injections and whether to inject, which is not conducive to the maintenance of patients' health.

[0003] A Chinese invention patent with publication number CN110201270A discloses a counting switch for an insulin syringe, which utilizes a switch driver to toggle a movable spring of the counting switch, and drives the movable spring to push and contact a static spring to conduct, thereby achieving the effect of recording the number of times. However, the switch driver must be in the same position or have a small displacement during the entire use process to be consistent with the toggle position of the counting switch to ensure the effect of electric counting, and the structural cost of electric counting is relatively high. Utility Model Content

[0004] The utility model aims to provide a counting structure to solve the problems that the injection tool in the prior art lacks the mechanical counting function and is inconvenient for patients to use.

[0005] Another object of the present invention is to provide an injection device to solve the problems of high manufacturing cost and high manufacturing precision in the electric counting method of the injection device in the prior art.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a counting structure of injection equipment, comprising:

[0008] a drive member having opposing proximal and distal ends;

[0009] A counting turntable, the counting turntable is arranged at the distal end of the driving component and has a distal side surface, a proximal side surface connected to the distal end of the driving component, a curved surface with scales, and a torsion spring connecting the proximal side surface of the counting turntable and the distal end of the driving component;

[0010] Among them, the distal end of the driving component is circumferentially provided with a plurality of slide grooves, the proximal side of the counting turntable is circumferentially provided with a plurality of slider members sliding in the slide grooves, and the distal end of the driving component and the proximal side of the counting turntable are slidably connected through the slide grooves and the slider members.

[0011] Furthermore, the chute has at least one chute depth.

[0012] Furthermore, the slide grooves correspond to the slider members one by one.

[0013] Furthermore, a proximal side of the counting turntable is provided with a boss, and a plurality of the sliding block members are circumferentially arranged on the outer side of the boss.

[0014] Furthermore, it also includes a reset structure, which includes a plurality of press bodies circumferentially arranged on an end surface of the counting dial and a reset key corresponding to one of the press bodies, and at least one of the press bodies is engaged in the assembly hole of the reset key.

[0015] The utility model also provides an injection device, comprising an injection housing, a piston, a transmission column and the counting structure as described above;

[0016] An injection housing, the injection housing comprising a transmission chamber housing and an injection chamber housing fixed to each other, and a counting display window is provided on the transmission chamber housing;

[0017] A transmission column, the two ends of which are respectively connected to the counting turntable and the piston, and a transmission spring is provided on the outside, and the transmission spring is arranged between the far side of the counting turntable and the inner wall of the transmission chamber housing at one end away from the driving component.

[0018] Furthermore, the transmission column comprises a transmission outer column and a transmission inner column which are sleeved with each other, and one end of the transmission inner column is rotationally connected to the piston.

[0019] Furthermore, it also includes a limiting component, which is fixed at the tail end of the inner cavity of the transmission chamber housing, and has at least one partition plate inside the limiting component, and the partition plate has a through hole for the transmission column to pass through.

[0020] Furthermore, the transmission spring includes a first spring and a second spring, a disc is provided on the outer side of the transmission column, the first spring is provided between the counting turntable and the disc, and the second spring is provided between the disc and the partition.

[0021] Furthermore, a piston guide is movably sleeved between the partition and the inner wall of the transmission chamber housing, and a connecting spring is provided between the piston guide and the partition.

[0022] The beneficial effects of the utility model are:

[0023] 1. Based on the original injection structure, a mechanical automatic counting function is added. When using it, the number of injections can be counted while the injection is being operated. The operation is simple and solves the problem of patients forgetting the number of injections in daily life.

[0024] 2. By setting a counting structure at the connection position of the driving component and the transmission component, the impact on the original transmission structure used for injection is reduced. During manufacturing and design, there is no need for more other components to be coordinated accordingly, and the requirements for manufacturing and assembly precision are low, which reduces the manufacturing difficulty and cost.

[0025] 3. It has a reset function. If the patient touches or presses the button by mistake, he can press the reset button in time to reset the count to ensure the accuracy of the counting results. A maximum of 12 counts can be achieved in a single cycle, which meets the patient's daily counting needs while simplifying the counting structure design.

[0026] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 is a three-dimensional diagram of a counting structure provided according to an embodiment of the present application;

[0029] Figure 2 It is a schematic diagram of the structure of the rotating seat provided according to the embodiment of the present application;

[0030] Figure 3 is a schematic diagram of the overall structure of the injection device provided according to an embodiment of the present application;

[0031] Figure 4 is an exploded view of an injection device according to an embodiment of the present application;

[0032] Figure 5 is a cross-sectional view of an injection device provided according to an embodiment of the present application;

[0033] Figure 6 It is a schematic diagram of the structure of the transmission inner column and the transmission outer column provided according to an embodiment of the present application;

[0034] Figure 7 is a schematic diagram of the structure of a guide kit provided according to an embodiment of the present application;

[0035] Figure 8 It is a schematic diagram of the piston guide structure provided according to an embodiment of the present application.

[0036] Among them, 1, button; 101, slide;

[0037] 2. Rotating seat; 201. Counting turntable; 202. Sliding block; 203. Torsion spring; 204. Boss; 205. Pressing body;

[0038] 3. Injection housing; 301. Transmission chamber housing; 3011. Counting display window; 3012. Reset assembly hole; 3013. Dose display window; 3014. Reset button; 302. Injection chamber housing;

[0039] 4. Blocked shots;

[0040] 5. Transmission column; 501. Transmission inner column; 502. Transmission outer column;

[0041] 6. Transmission spring; 601. First spring; 602. Disc member; 603. Second spring;

[0042] 7. Guide kit; 701. Piston guide; 702. Connecting spring;

[0043] 8. Piston. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] See also Figure 1The utility model discloses a counting structure, including a button 1 and a rotating seat 2, both of which are roughly cylindrical components, which are convenient for parts assembly and coaxial transmission between parts. The force-bearing end direction of the button 1 is the proximal end, the end in the other direction is the distal end, and so on. A plurality of slide grooves 101 are arranged circumferentially on the distal end of the button 1, the distal end of the rotating seat 2 is a counting turntable 201, a plurality of sliders 202 sliding in the slide grooves 101 are arranged circumferentially on the outer side of the proximal end, and the proximal end has a torsion spring 203 connected to the inner side of the button 1. When the button 1 is pressed, the button 1 moves axially in the direction of the rotating seat 2 for a distance, so that the slider enters the slide groove 101 and reaches the deepest part of the slide groove 101. At this time, the patient releases the button 1, and under the action of the torsion spring 203, the button 1 returns to its original position. In this process, the slider 202 passes through at least one slide groove 101 and enters the next slide groove 101, the rotating seat 2 rotates a certain angle, and the scale of the counting turntable 201 rotates one grid.

[0048] like Figure 1 As shown, the proximal end of the key 1 has an integrally formed stop zone and a sleeve zone, the radius of the stop zone is larger than the radius of the sleeve zone, and in actual design, the actual radius of the stop zone is between the radius of the sleeve zone and the inner diameter of the outer sleeve shell cavity, so that the key 1 has a fixed axial movement area, or other key 1 stop structures are provided on the stop zone, which can also achieve this effect. The torsion spring 203 is assembled inside the sleeve zone, and the slide groove 101 is located at the distal end of the sleeve zone.

[0049] The slide groove 101 has at least one groove depth, and forms a groove depth area with the distal surface of the sleeve area, or with the shallow groove near the distal surface of the sleeve area, for the proximal end of the slider 202 to slide. In the process of pressing and counting, the torsion spring 203 converts part of the axial driving force into the circumferential rotational force of the rotating seat 2, and the proximal end of the slider 202 always slides in the groove depth area, that is, at least one surface or one point on the proximal end of the slider 202 always contacts the inner wall of the slide groove 101 and slides on the inner wall of the slide groove 101, converting the axial driving part of the rotating seat 2 into a certain angle of rotation of the rotating seat 2, so that the scale of the counting dial 201 rotates one grid every time it is pushed.

[0050] As a specific extended embodiment, the slide groove 101 corresponds to the slider member 202 one by one and has a similar shape. In a natural state, the proximal end of each slider member 202 is always in contact with the inner wall of the corresponding slide groove 101, ensuring the coaxial connection between the rotating seat 2 and the button 1, avoiding axial displacement, reducing the adverse effects on the axial transmission, and improving the coordination between parts and the patient's experience.

[0051] In order to make the rotating seat 2 more adaptable to the external sleeve shell, the proximal end of the rotating seat 2 has a boss 204 with a radius smaller than the counting dial 201 , a plurality of slider members 202 are circumferentially arranged on the outer curved surface of the boss 204 , and the torsion spring 203 is arranged on the proximal surface of the boss 204 .

[0052] like Figure 2 As shown, in order to realize the function of resetting the counting result, a plurality of pressing bodies 205 are circumferentially arranged on one end surface of the rotating seat 2, and a reset button 3014 corresponding to the position of one of the pressing bodies 205 and capable of being pressed radially is arranged on the outer surface of the external sleeve shell. In a natural state, at least one pressing body 205 is buckled in the assembly hole 3012 of the reset button 3014. When the patient accidentally touches or presses the button in daily use, the reset button 3014 is pressed to push the pressing body 205 in the assembly hole 3012 out of the hole. The rotating seat 2 rotates a certain angle under the action of the torsion spring 203 or other transmission springs 6, so that the counting dial 201 rotates to the smallest scale. At this time, the pressing body 205 corresponding to the smallest scale is buckled in the reset assembly hole 3012 to realize the positioning of the smallest scale.

[0053] More specifically, the pressing body 205 is arranged on the outside of the slider 202 and corresponds to it one by one. Each time the button 1 is pressed, the slider 202 slides from the original slide groove 101 to the next slide groove 101, and the pressing body 205 corresponding to the assembly hole 3012 also rotates circumferentially once, and the adjacent pressing body 205 replaces the original pressing body 205 and enters the reset assembly hole 3012, so that the counting dial 201 rotates one scale.

[0054] Among them, a stop assembly corresponding to the minimum scale is arranged between the rotating seat 2 and the external assembly sleeve. The rotating seat 2 rotates under the action of the torsion spring 203 and other transmission springs 6. When it rotates to the minimum scale, the stop assembly on the rotating seat 2 engages with the stop assembly on the inner wall of the external assembly sleeve to assist in achieving the counting reset effect. The stop assembly can be a T-shaped protrusion and a joint member with grooves on both sides. When the rotating seat 2 rotates counterclockwise or clockwise, one end of the T-shaped protrusion can engage with a groove to achieve stopping.

[0055] refer to Figure 3-5 The utility model also discloses an injection device, including an injection housing 3, a piston 8, a transmission column 5 and the above-mentioned counting structure. The injection housing 3 includes a transmission chamber housing 301 and an injection chamber housing 302 fixed to each other. The transmission chamber housing 301 is sleeved on the transmission column 5, the transmission spring 6, the rotating seat 2 and the outer side of the far end of the button 1. The inner cavity of the injection chamber housing 302 is a medicine bottle installation cavity. After the medicine bottle is installed, the piston 8 is located at the open end of the medicine bottle. The transmission chamber housing 301 is provided with a counting display window 3011, a reset button 3014 and a dosage display window 3013;

[0056] The distal end surface of the counting disc 201 and the proximal end of the piston 8 are connected through the transmission column 5, and the transmission spring 6 is sleeved on the outer side of the transmission column 5. The transmission spring 6 is arranged between the distal side surface of the counting disc 201 and the cavity wall of the distal end of the transmission chamber housing 301. When the button 1 is pressed, part of the driving force is converted into the rotation force of the rotating seat 2 by the torsion spring 203, and the remaining driving force is transmitted to the piston 8 through the rotating seat 2, the transmission column 5 and the transmission spring 6 in sequence, so that the piston 8 moves to realize the injection function.

[0057] like Figure 4-6 As shown, the transmission column 5 includes a transmission outer column 502 and a transmission inner column 501 which are sleeved with each other, one end of the transmission inner column 501 is rotatably connected with the piston 8, the distal end of the transmission outer column 502 does not contact the piston 8, and the outer sides of the transmission outer column 502 and the transmission inner column 501 are both provided with threads and anti-rotation grooves axially distributed on the threads. The inner cavity of the transmission chamber housing 301 is provided with a stopper matching the threads and anti-rotation grooves of the transmission outer column 502, so that the transmission outer column 502 can perform axial movement of a certain distance while rotating a fixed number of cycles, and the threads and anti-rotation grooves on the transmission inner column 501 cooperate with the inner wall of the transmission outer column 502 to form a channel for air fluid, so as to avoid the attraction between the transmission outer column 502 and the transmission inner column 501 during the axial movement of the transmission column 5, causing the axial movement of the transmission column 5 to deviate, or generating air plugs to affect the effect of injection advancement. Among them, the distal end of the transmission inner column 501 is spherical and rotatably installed in the piston 8, further reducing the adverse effects of the transmission column 5 rotating with the rotating seat 2 on the injection advancement.

[0058] like Figure 4-5 As shown, the injection device further includes a limiting component, which is fixedly mounted at the rear end of the inner cavity of the transmission chamber housing 301. The limiting component has at least one partition plate, which has a through hole for the transmission column 5 to pass through. The partition plate receives the distal end of the transmission spring 6. When the injection is completed, the patient releases the button 1, and the compressed transmission spring 6 rebounds under the restriction of the partition plate, driving the transmission column 5 to move axially in the opposite direction of the injection push, thereby resetting the piston 8. The limiting component can be a partition plate fixedly mounted at the distal inner cavity of the transmission chamber housing 301, or a guide kit 7 with a partition plate fixedly mounted at the distal inner cavity of the transmission chamber housing 301.

[0059] In order to further reduce the interaction force between the components, the transmission spring 6 includes a first spring 601 and a second spring 603. A disc member 602 is provided on the outer side of the transmission outer column 502. The first spring 601 is provided between the counting turntable 201 and the disc member 602 to convert the elastic potential energy into the rotational potential energy of the rotating seat 2 when it is reset. The second spring 603 is provided between the disc member 602 and the partition to provide potential energy for the reset of the piston 8 after the injection is completed.

[0060] like Figure 4 as well as Figure 6-8As shown, a piston guide 701 is movably sleeved between the partition and the inner wall of the transmission chamber housing 301, and a connecting spring 702 is provided between the piston guide 701 and the partition, so that the piston 8 always moves axially. Furthermore, a group of guide components is provided between the piston guide 701 and the partition, and during the movement of the piston 8, the guide components slide against each other, ensuring that the piston 8 does not deviate during the axial movement.

[0061] The guide assembly is a finger-shaped protrusion provided at the proximal end of the piston guide member 701, and a guide hole on the partition plate adapted to the protrusion, and the finger-shaped protrusion slides in the guide hole. More specifically, the edge of the guide hole on the far side of the partition plate has a protrusion to form an extension groove of the guide hole, thereby avoiding assembly offset between the guide assemblies and further ensuring the effect of axial movement of the piston 8.

[0062] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A counting structure, characterized in that: include: a drive member having opposing proximal and distal ends; A counting turntable (201), the counting turntable (201) being arranged at the distal end of the driving component and comprising a distal side surface, a proximal side surface connected to the distal end of the driving component, a curved surface provided with scales, and a torsion spring (203) connecting the proximal side surface of the counting turntable (201) and the distal end of the driving component; The distal end of the driving component is circumferentially provided with a plurality of slide grooves (101), the proximal side of the counting turntable (201) is circumferentially provided with a plurality of sliding blocks (202) sliding in the slide grooves (101), and the distal end of the driving component is slidably connected to the proximal side of the counting turntable (201) via the slide grooves (101) and the sliding blocks (202).

2. The counting structure according to claim 1, characterized in that: The slide groove (101) has at least one groove depth.

3. The counting structure according to claim 1, characterized in that: The slide grooves (101) correspond to the slider members (202) one by one.

4. The counting structure according to claim 1, characterized in that: The proximal side of the counting turntable (201) is provided with a boss (204), and a plurality of sliding blocks (202) are circumferentially arranged on the outer side of the boss (204).

5. The counting structure according to claim 1, characterized in that: The device also includes a reset structure, which includes a plurality of press bodies (205) circumferentially arranged on an end surface of the counting turntable (201) and a reset key (3014) corresponding to one of the press bodies (205), and at least one of the press bodies (205) is engaged in an assembly hole of the reset key (3014).

6. An injection device, characterized in that: It comprises an injection housing (3), a piston, a transmission column (5) and a counting structure as claimed in any one of claims 1 to 5; An injection housing (3), the injection housing (3) comprising a transmission chamber housing (301) and an injection chamber housing (302) fixedly connected to each other, and a counting display window (3011) is provided on the transmission chamber housing (301); A transmission column (5), the two ends of which are respectively connected to the counting disc (201) and the piston, and a transmission spring (6) is provided on the outside, wherein the transmission spring (6) is provided between the far side of the counting disc (201) and the inner wall of the transmission chamber housing (301) at one end away from the driving component.

7. The injection device according to claim 6, characterized in that The transmission column (5) comprises a transmission outer column (502) and a transmission inner column (501) which are sleeved together, and one end of the transmission inner column (501) is rotatably connected to the piston.

8. The injection device according to claim 6, characterized in that It also comprises a limiting component, which is fixedly arranged at the rear end of the inner cavity of the transmission chamber housing (301), and has at least one partition plate inside the limiting component, and the partition plate has a through hole for the transmission column (5) to pass through.

9. The injection device according to claim 8, characterized in that The transmission spring (6) comprises a first spring (601) and a second spring (603); a disc member (602) is provided on the outer side of the transmission column (5); the first spring (601) is provided between the counting turntable (201) and the disc member (602); and the second spring (603) is provided between the disc member (602) and the partition plate.

10. The injection device according to claim 8, characterized in that A piston guide (701) is movably sleeved between the partition and the inner wall of the transmission chamber housing (301), and a connecting spring (702) is provided between the piston guide (701) and the partition.

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