Medicine pushing mechanism

Abstract

The utility model belongs to the technical field of injection pens, and particularly relates to a medicine pushing mechanism which comprises a supporting block, a medicine pushing rod and a medicine pushing rod. The medicine pushing rod is in threaded connection with the supporting block, and a first flat position is arranged on the side wall of the medicine pushing rod; the sounding disc is arranged on the first flat position in a sleeving mode, a plurality of percussion teeth are elastically arranged on the side wall of the sounding disc, and when the medicine pushing rod is pushed, the medicine pushing rod rotates and drives the sounding disc to rotate, so that the percussion teeth hit the sounding teeth; in short, the supporting block is installed in the injection pen shell, the medicine cylinder shell is inserted into the bottom of the injection pen, the medicine cylinder body is inserted into the medicine cylinder shell, and when the medicine pushing rod is pushed downwards to push the medicine cylinder body, the medicine pushing rod can rotate at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection pens, and particularly relates to a medicine pushing mechanism. Background Art

[0002] At present, during the treatment of diabetes, insulin injection is a common medical method. An insulin injection pen is a syringe used to help diabetic patients inject insulin. It has the advantages of being easy to carry and convenient to operate. Its shape is similar to a pen. The insulin liquid medicine is placed in the pen core, and there is a specific pushing device inside. After installation, a sterile injection needle is screwed on before injection, and then through a series of operations, the insulin is accurately injected into the patient's body.

[0003] However, the existing injection pens cannot make a sound when pushing the medicine, and cannot give a sound prompt to patients, especially elderly patients, whether the injection is completed.

[0004] Therefore, how to prevent patients from not knowing whether the injection pen has completed the injection is a technical problem that urgently needs to be solved in the field. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a medicine pushing mechanism.

[0006] To solve the above technical problems, the utility model provides a medicine pushing mechanism, including: a support block, in which a sound generating cavity is opened, and a plurality of sound generating teeth are annularly arranged in the sound generating cavity; a medicine pushing rod, which is threadedly connected to the support block, and a first flat position is arranged on the side wall of the medicine pushing rod; a sound generating disc, which is sleeved on the first flat position, and a plurality of striking teeth are elastically arranged on the side wall of the sound generating disc. Among them, when the medicine pushing rod is pushed, the medicine pushing rod rotates and drives the sound generating disc to rotate, so that the striking teeth strike the sound generating teeth.

[0007] Preferably, a through hole is opened on the sound generating cavity, and spiral edges are arranged in the through hole. The medicine pushing rod is threadedly connected to the spiral edges.

[0008] Preferably, the ratio of the major diameter to the pitch of the spiral edges is 2.0 - 2.5.

[0009] Preferably, the ratio of the major diameter to the minor diameter of the spiral edges is 1.05 - 1.6.

[0010] Preferably, the end of the medicine pushing rod extends out of the support block, and a medicine pushing block is further arranged at the extending end of the medicine pushing rod.

[0011] Preferably, an installation blind hole is opened on the medicine pushing block, an installation ring groove is arranged at the mouth of the installation blind hole, and a clamping ring is arranged at the extending end of the medicine pushing rod. The clamping ring is inserted into the installation blind hole.

[0012] Preferably, a plurality of sounding elastic pieces are arranged on the side wall of the sounding disc, and the striking teeth are integrally arranged on the sounding elastic pieces.

[0013] Preferably, a limiting cavity is formed in the supporting block, the limiting cavity communicates with the sounding cavity, a limiting elastic piece is arranged on the side wall of the limiting cavity and inclines inwards; a limiting disc is integrally arranged on the side wall of the sounding disc, and the top of the limiting disc abuts against the bottom of the limiting elastic piece.

[0014] Preferably, the first flat portion extends to the thread on the side wall of the medicine pushing rod.

[0015] The beneficial effects of the present utility model are as follows:

[0016] When the medicine pushing rod is pushed downwards to push the medicine cylinder body, the medicine pushing rod can rotate simultaneously, and the sounding disc can be driven to rotate through the first flat portion, so that the striking teeth strike the sounding teeth to make a sound to prompt the patient that the injection has been successfully completed.

[0017] Other features and advantages of the present utility model will be described in the following specification, and part of them will be obvious from the specification or understood by implementing the present utility model.

[0018] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given in conjunction with the accompanying drawings and described in detail as follows. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is an installation schematic diagram of a preferred embodiment of the medicine pushing mechanism and the injection pen housing of the present utility model;

[0021] Figure 2 is a cross-sectional view of a preferred embodiment of the medicine pushing mechanism of the present utility model;

[0022] Figure 3 is a perspective view of a preferred embodiment of the medicine pushing mechanism of the present utility model;

[0023] Figure 4 is a cross-sectional view of a preferred embodiment of the medicine pushing mechanism of the present utility model;

[0024] Figure 5 isFigure 4 Exploded view;

[0025] Figure 6 is a perspective view of a preferred embodiment of the sound - generating disc of the present utility model.

[0026] In the figure:

[0027] 1. Support block;

[0028] 11. Sound - generating cavity; 111. Through - hole; 112. Spiral rib; 12. Sound - generating tooth; 13. Limiting cavity; 131. Limiting elastic piece;

[0029] 2. Medicine - pushing rod;

[0030] 21. First flat position; 22. Medicine - pushing block; 221. Installation blind hole; 222. Installation ring groove; 23. Clamping ring;

[0031] 3. Sound - generating disc;

[0032] 31. Firing tooth; 32. Sound - generating elastic piece; 33. Limiting disc; 34. Second flat position.

[0033] 4. Injector pen housing; 5. Cartridge housing; 6. Cartridge body. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] Such as Figures 1 to 6As shown, at least one embodiment provides a medicine pushing mechanism, including: a support block 1, in which a sound generating cavity 11 is formed, and a number of sound generating teeth 12 are arranged in a ring inside the sound generating cavity 11; a medicine pushing rod 2, which is threadedly connected to the support block 1, and a first flat position 21 is arranged on the side wall of the medicine pushing rod 2; a sound generating disc 3, which is sleeved on the first flat position 21, and a number of firing teeth 31 are elastically arranged on the side wall of the sound generating disc 3. Among them, when the medicine pushing rod 2 is pushed, the medicine pushing rod 2 rotates and drives the sound generating disc 3 to rotate, so that the firing teeth 31 strike the sound generating teeth 12; in short, the support block 1 is installed in the injection pen housing 4, the cartridge housing 5 is inserted at the bottom of the injection pen, and the cartridge body 6 is inserted into the cartridge housing 5. When the medicine pushing rod 2 is pushed downward to push the cartridge body 6, the medicine pushing rod 2 can rotate at the same time, and the sound generating disc 3 can be driven to rotate through the first flat position 21, so that the firing teeth 31 strike the sound generating teeth 12, making a sound to prompt the patient that the injection has been successfully completed. Among them, an installation hole (not marked in the figure) adapted to the medicine pushing rod 2 is formed on the sound generating disc 3, and a second flat position 34 adapted to the first flat position 21 is arranged on the side wall of the installation hole.

[0036] In some embodiments, a through hole 111 is formed on the sound generating cavity 11, and a spiral rib 112 is arranged in the through hole 111, and the medicine pushing rod 2 is threadedly connected to the spiral rib 112; in short, the spiral rib 112 is a continuous raised part with a spiral shape and a specific cross-section made on the inner surface of the through hole 111, which includes parameters such as major diameter, minor diameter, and pitch. By adjusting the pitch, when the medicine pushing rod 2 is pushed, it can be smoothly guided and rotated by the spiral rib 112.

[0037] In some embodiments, the ratio of the major diameter to the pitch of the spiral rib 112 is 2.0 - 2.5; in short, if the ratio of the major diameter to the pitch is too small, the rotation of the medicine pushing rod 2 will not be smooth, and on the contrary, the rotation angle of the medicine pushing rod 2 will be too small and the sound generating frequency will be too low.

[0038] In some embodiments, the ratio of the major diameter to the minor diameter of the spiral rib 112 is 1.05 - 1.6; in short, if the ratio of the major diameter to the minor diameter is too small, the spiral rib 112 is likely to be worn, and on the contrary, the strength of the spiral rib 112 will be too low and it is easy to break.

[0039] In some embodiments, the end of the medicine pushing rod 2 extends out of the support block 1, and a medicine pushing block 22 is further arranged at the extending end of the medicine pushing rod 2; in short, the contact area between the medicine pushing rod 2 and the cartridge body 6 can be increased through the medicine pushing block 22, so that the medicine pushing rod 2 can stably push the piston of the medicine bottle.

[0040] In some embodiments, an installation blind hole 221 is formed in the medicine pushing block 22, and an installation ring groove 222 is arranged at the opening of the installation blind hole 221. A clamping ring 23 is arranged at the extending end of the medicine pushing rod 2, and the clamping ring 23 is inserted into the installation blind hole 221. In short, through the clamping ring 23 and the installation ring groove 222, the medicine pushing block 22 can be installed at the end of the medicine pushing rod 2, and the medicine pushing block 22 and the medicine pushing rod 2 can rotate, avoiding friction between the medicine pushing block 22 and the piston of the medicine cylinder body 6.

[0041] In some embodiments, a plurality of sounding elastic pieces 32 are arranged on the side wall of the sounding disc 3, and the striking teeth 31 are integrally arranged on the sounding elastic pieces. In short, through the deformation of the sounding elastic pieces 32, the striking teeth 31 can reciprocally strike the sounding teeth 12.

[0042] In some embodiments, a limiting cavity 13 is formed in the supporting block 1, the limiting cavity 13 communicates with the sounding cavity 11, and a limiting elastic piece 131 is arranged on the side wall of the limiting cavity 13, and the limiting elastic piece 131 inclines inwards. A limiting disc 33 is integrally arranged on the side wall of the sounding disc 3, and the top of the limiting disc 33 abuts against the bottom of the limiting elastic piece 131. In short, the inward inclination of the limiting elastic piece 131 can complete the limitation of the limiting disc 33, and when installing the limiting disc 33, only need to press the limiting disc 33 into the limiting cavity 13 to make the limiting elastic piece 131 deform outwards.

[0043] In some embodiments, the first flat position 21 extends to the thread on the side wall of the medicine pushing rod 2. In short, the extension of the first flat position 21 to the thread on the side wall of the medicine pushing rod 2 can reduce the length of the medicine pushing rod 2 and the overall length of the injection pen, with a simple and reliable structure.

[0044] In the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0045] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0046] Taking the above-mentioned ideal embodiment of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A medicine pushing mechanism, characterized in that: include: A support block, in which a sound-generating cavity is provided, and a plurality of sound-generating teeth are arranged in a circle in the sound-generating cavity; A medicine pushing rod, which is threadedly connected to the support block, and a side wall of the medicine pushing rod is provided with a first flat portion; The sounding plate is sleeved on the first flat position, and the side wall of the sounding plate is elastically provided with a plurality of firing teeth, wherein When the medicine pushing rod is pushed, the medicine pushing rod rotates and drives the sounding disk to rotate, so that the firing tooth strikes the sounding tooth.

2. The medicine pushing mechanism according to claim 1, characterized in that: A through hole is provided on the sound-generating cavity, a spiral ridge is arranged in the through hole, and the medicine-pushing rod is threadedly connected with the spiral ridge.

3. The medicine pushing mechanism according to claim 2, characterized in that: The ratio of the major diameter of the spiral rib to the pitch is 2.0-2.

5.

4. The medicine pushing mechanism according to claim 2, characterized in that: The ratio of the major diameter to the minor diameter of the spiral edge is 1.05-1.

6.

5. The medicine pushing mechanism according to claim 1, characterized in that: The end of the medicine pushing rod extends out of the support block, and a medicine pushing block is arranged at the extended end of the medicine pushing rod.

6. The medicine pushing mechanism according to claim 5, characterized in that: The medicine pushing block is provided with a mounting blind hole, the mouth of the mounting blind hole is provided with a mounting ring groove, the protruding end of the medicine pushing rod is provided with a clamping ring, and the clamping ring is inserted into the mounting blind hole.

7. The medicine pushing mechanism according to claim 1, characterized in that: The side wall of the sound-generating plate is provided with a plurality of sound-generating spring pieces, and the firing teeth are integrally arranged on the sound-generating spring pieces.

8. The medicine pushing mechanism according to claim 1, characterized in that: A limiting cavity is provided on the support block, the limiting cavity is communicated with the sound-generating cavity, a limiting spring sheet is provided on the side wall of the limiting cavity, and the limiting spring sheet is inclined inwards; A limiting plate is integrally arranged on the side wall of the sound-generating plate, and the top of the limiting plate is in contact with the bottom of the limiting spring sheet.

9. The medicine pushing mechanism according to claim 1, characterized in that: The first flat portion extends to the thread of the side wall of the medicine pushing rod.

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