Sound production mechanism of pen type injector

Abstract

The utility model discloses a sounding mechanism of a pen-type injector, which comprises a push rod rotating cylinder, a push rod rotating cylinder, a push rod rotating cylinder, a push rod rotating cylinder, a push rod rotating cylinder and a push rod rotating cylinder, and is characterized in that the push rod rotating cylinder is arranged in an injector shell; threaded teeth are uniformly arranged on the surface of the single-sided gear rod, the single-sided gear rod is arranged in the push rod rotating drum, one end of the single-sided gear rod abuts against the clamping table in the push rod rotating drum, and single-sided gear teeth are arranged at the end, away from the clamping table of the push rod rotating drum, of the single-sided gear rod; the bouncing piece is arranged at the end, away from the push rod rotary drum clamping table, of the single-face gear rod in a sleeving mode, and bouncing teeth capable of being clamped with the single-face gear in the tooth direction are evenly arranged on the bouncing piece. The spring is arranged on the bouncing piece in a sleeving mode, and the top cap is used for pressing the bouncing piece downwards and pushing the single-face gear rod. Through the mutual cooperation of the push rod rotating cylinder, the single-sided gear rod, the bouncing piece, the spring and the top cap, the injection pen can make mechanical sounds in the forward rotation, reverse rotation and injection processes, an operator can clearly know whether the operation is in place or not, injection and use are more convenient, and operation is simpler.

Description

TECHNICAL FIELD

[0001] The utility model relates to pen type injector technical field, concretely is a pen type injector's sound production mechanism. BACKGROUND

[0002] Diabetic patients, obese patients or other patients who need to take medicine by themselves often need to inject medicine in different places. Ordinary patients are not only inconvenient but also cannot effectively achieve precise medication in the process of using old disposable syringes.

[0003] A kind of injection pen structure that can be adjusted in two directions (increment and decrement) is disclosed in Chinese patent CN 101829381A published in 2010, and the sound emitted by the elastic rebound between the two kinds of adjustment directions is the plastic deformation between plastic parts and the teeth matched with each other. This structure has a disadvantage: the plastic parts are easy to deform, the elastic force is not easy to control, and a stable elastic rebound force cannot be formed, so the sound emitted is relatively dull, which is not conducive to the effective identification of users.

[0004] To solve the possible problems in CN 101829381A, the utility model provides a sound production mechanism of pen type injector to solve the above technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims to solve the problem that the plastic parts are easy to deform, the elastic force is not easy to control, and a stable elastic rebound force cannot be formed, so the sound emitted is relatively dull, which is not conducive to the effective identification of users in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A sound production mechanism of pen type injector, comprising:

[0008] A push rod rotating drum is installed in the syringe housing, and a circumferential tooth is arranged on the inner wall of one end of the push rod rotating drum;

[0009] A single-face gear rod is arranged in the push rod rotating drum, and a single-face gear tooth is arranged on one end of the single-face gear rod away from the clamping table in the push rod rotating drum;

[0010] A rebounding part is arranged on one end of the single-face gear rod away from the clamping table in the push rod rotating drum, and rebounding teeth that can be engaged with the single-face gear tooth are uniformly arranged on the rebounding part;

[0011] A spring is arranged on the rebounding part, and a top cap is used to press down the rebounding part and push the single-face gear rod.

[0012] Further, the elastic arm is arranged on the elastic piece, and the elastic arm is arranged in an arc shape on the edge of the elastic piece.

[0013] Further, when the push rod rotating drum is twisted clockwise, the single-sided gear rod is locked in the clockwise direction, the elastic piece and the single-sided gear tooth are locked with each other, the circumferential tooth of the inner hole of the push rod rotating drum and the elastic arm of the elastic piece form periodic jumping, and a rhythmic sound is emitted.

[0014] Further, when the push rod rotating drum is twisted counterclockwise, the elastic arm of the elastic piece and the circumferential tooth of the push rod rotating drum are locked in the direction, and the teeth between the single-sided gear and the elastic piece are periodically jumped under the action of the spring.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] Through the mutual cooperation between the push rod rotating drum, the single-sided gear rod, the elastic piece, the spring and the top cap, the injection pen can emit mechanical sound in the forward rotation, the reverse rotation and the injection process, the operator can know whether the operation is in place, the injection and the use are more convenient, and the operation is simpler. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a structural schematic view of the utility model;

[0018] Fig. 2 is an explosion view of the utility model.

[0019] In the drawing: 1, push rod rotating drum; 2, circumferential tooth; 3, single-sided gear rod; 4, single-sided gear tooth; 5, elastic piece; 6, elastic tooth; 7, spring; 8, top cap; 9, elastic arm; 10, push rod. DETAILED DESCRIPTION

[0020] In the following description, a large number of specific details are given in order to provide a more thorough understanding of the utility model. However, it is obvious for those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0021] Applicant designs as Figs. 1-2The sound generating mechanism of the pen type injector shown in the embodiment comprises: a push rod rotating drum 1 installed in the injector housing, the inner wall of one end of the push rod rotating drum 1 is provided with a circumferential tooth 2; a single-sided gear rod 3, the surface of the single-sided gear rod 3 is uniformly provided with a threaded tooth, the single-sided gear rod 3 is arranged in the push rod rotating drum 1, one end of the single-sided gear rod 3 abuts against a clamping table in the push rod rotating drum 1, the single-sided gear rod 3 is provided with a boss matched with a groove on the push rod 10 of the injector, a single-sided gear tooth 4 is arranged on the end of the single-sided gear rod 3 away from the clamping table of the push rod rotating drum 1; a bouncing piece 5, the bouncing piece 5 is sleeved on the end of the single-sided gear rod 3 away from the clamping table of the push rod rotating drum 1, the bouncing piece 5 is uniformly provided with a bouncing tooth 6 capable of engaging with the single-sided gear tooth 4; a spring 7 and a top cap 8, the spring 7 is sleeved on the bouncing piece 5, and the top cap 8 is used for pressing the bouncing piece 5 downward and pushing the single-sided gear rod 3.

[0022] Further, the sound generating mechanism of the pen type injector of the embodiment is further optional, the bouncing piece 5 is further provided with a spring arm 9, the spring arm 9 is arranged on the edge of the bouncing piece 5 in an arc shape, and the spring arm 9 cannot rotate when rotating counterclockwise and abutting against the circumferential tooth 2.

[0023] Further, the sound generating mechanism of the pen type injector of the embodiment is further optional, when the push rod rotating drum 1 is twisted clockwise, the single-sided gear rod 3 is locked in the clockwise direction, at this time, the bouncing piece 5 and the single-sided gear tooth 4 are locked with each other, the circumferential tooth 2 of the hole in the push rod rotating drum 1 and the spring arm 9 of the bouncing piece 5 form periodic jumping, thereby generating a rhythmic sound.

[0024] Further, the sound generating mechanism of the pen type injector of the embodiment is further optional, when the push rod rotating drum 1 is twisted counterclockwise, the spring arm 9 of the bouncing piece 5 and the circumferential tooth 2 of the push rod rotating drum 1 are locked in this direction, under the action of the spring 7, the teeth between the single-sided gear and the bouncing piece 5 periodically jump with each other, and since the torsion formed by the tooth jumping in this direction is insufficient to overcome the torsion required to be overcome by the ratchet structure at the lower end of the push rod 10, the single-sided gear does not rotate at this time.

[0025] Further, the sound generating mechanism of the pen type injector of the embodiment is further optional, when injection is needed, the top cap 8 is pressed and pushed, at this time, all the teeth are engaged with each other, the torsion required to overcome the mutual rotation of the push rod 10 and the ratchet cover in the injector can be formed, and the sliding jumping between the push rod 10 and the ratchet cover emits a sound during injection.

[0026] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A sound generating mechanism for a pen injector, characterised in that, The utility model relates to a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm.

2. A sound generating mechanism for a pen injector according to claim 1, wherein The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm.

3. A sound generating mechanism for a pen injector according to claim 2, wherein The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm.

4. A sound generating mechanism for a pen injector according to claim 2, wherein The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a push rod rotating drum, single-sided gear rod, spring, top cap and elastic arm. The utility model discloses a

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