Pen type injector with sound production effect

Abstract

The utility model discloses a pen type injector with a sound production effect, which comprises a pen refill frame, a pen container, a pen cap, a pen cap, a pen cap, a pen cap, a pen cap and a pen cap, and is characterized in that threads are arranged at one end of the pen refill frame; threads matched with the threads on the pen refill frame are arranged in the pen cap, and the pen cap and the pen refill frame are installed in a rotating mode; the pen body is mounted at one end of the pen refill frame in a buckling manner; the push rod assembly is arranged in the pen body, an assembly with a gear is arranged in the push rod assembly, and sound is made between the assemblies with the gear in the push assembly by rotating or pressing the push assembly. By arranging the push rod assembly, the injection pen can make mechanical sounds in the forward rotation, reverse rotation and injection processes, an operator can clearly know whether operation is in place or not, practicability is more convenient, and operation is simpler.

Description

Technical Field

[0001] This utility model relates to the field of injection pen technology, specifically a pen-type injector with a sound-producing effect. Background Technology

[0002] Diabetic patients, obese patients, or other patients who need to self-medicate often need to inject themselves with medication in different situations. For ordinary patients, using old-fashioned disposable syringes is both inconvenient and cannot effectively achieve accurate medication administration.

[0003] Chinese patent CN 101829381A, published in 2010, discloses an injection pen structure that can be adjusted in both directions (increase and decrease). Both adjustment directions involve the plastic deformation between plastic parts and the sound produced by the bounce between the mating teeth. This structure has a drawback: the plastic parts are easy to deform, the elasticity is not easy to control, and it is impossible to form a stable bouncing force, resulting in a relatively dull sound that is not conducive to effective identification by the user.

[0004] In order to solve the problems that may exist in CN 101829381A, this utility model provides a pen-type injector with sound-producing effect to solve the above-mentioned technical problems. Utility Model Content

[0005] Purpose of the utility model: To solve the problem in the prior art that plastic parts are easily deformed, the elasticity is not easy to control, and a stable bouncing force cannot be formed, resulting in a dull sound that is not conducive to effective identification by users.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pen-type injector with a sound-producing effect, comprising:

[0008] A pen refill holder, wherein one end of the pen refill holder is provided with a thread and the other end is provided with a buckle;

[0009] The pen cap has a thread inside that matches the thread on the pen refill holder, and is rotatably mounted to the pen refill holder.

[0010] The pen body is attached to one end of the pen refill holder via a snap-fit ​​mechanism.

[0011] A push rod assembly is disposed in the pen body. The push rod assembly contains a gear component. Rotating or pressing the push assembly causes the gear component in the push assembly to make a sound.

[0012] Furthermore, the push rod assembly includes:

[0013] A push rod rotating cylinder is disposed in the pen body, with one end extending to the outside of the pen body and being installed with the pen body through a window clip;

[0014] A single-sided gear rod is disposed in a push rod cylinder, and a memory element is sleeved in the gap between the single-sided gear rod and the push rod cylinder. The memory element is fixed at the foremost end in the injection direction.

[0015] A large push rod is disposed in a single-sided gear rod, and a spring arm is installed at one end of the large push rod; the large push rod has two axially arranged grooves, and the inner hole of the single-sided gear rod has ribs along the axial direction, which cooperate with each other to lock the large push rod and the single-sided gear rod in the rotational direction and move relative to each other in the axial direction; one end of the large push rod is provided with a single-sided spring tooth, the double-sided gear ring wheel is provided with teeth on both sides, and the inner hole of the push rod cylinder has a single-sided spring tooth;

[0016] The ratchet cover has a ring of teeth inside and is fixed in the mounting position between the pen body and the pen refill holder. The spring arm of the large push rod engages with the teeth inside the ratchet cover. The ratchet cover is also provided with a push rod drive.

[0017] The small push rod is rotatably mounted in the large push rod and is pushed in the injection direction by the large push rod. The small push rod is provided with a push handle.

[0018] The top cap is located at one end of the pen body and can be movably locked onto the pen body. A spring is also provided between the top cap and the large push rod, and the spring is sleeved on the end of the large push rod where a single-sided spring tooth is provided.

[0019] Furthermore, when the push rod cylinder is turned clockwise, the single-sided gear rod is locked in the clockwise direction. The double-sided gear ring wheel and the single-sided gear rod in this direction are designed to be locked to each other. In the opposite direction, they can slide against each other. The spring teeth in the inner hole of the push rod cylinder and the double-sided gear ring wheel A are designed to slide against each other in this direction and be locked against each other in the opposite direction. Due to the presence of the spring, they form a periodic bounce, thus producing a rhythmic mechanical sound.

[0020] Furthermore, when the push rod cylinder is turned counterclockwise, the spring teeth A of the double-sided gear ring wheel and the spring teeth of the push rod cylinder are locked in this direction. Under the action of the spring, the teeth between the single-sided gear rod and the double-sided gear ring wheel periodically jump to each other.

[0021] Furthermore, when injection is needed, press down on the top cap and push it. At this time, all the teeth mesh together, forming a torque that overcomes the mutual rotation of the large push rod and the ratchet cover. At this time, all the adjustment parts rotate together. The teeth of the adjustment part do not make a sound. The sound made during injection is the sliding and jumping sound between the large push rod and the ratchet cover.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] By setting up a push rod assembly, the injection pen can emit mechanical sounds during forward and reverse rotation and during injection, allowing the operator to clearly see whether the operation is in place, making it more convenient and easier to use. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0025] Figure 2 This is an exploded view of the present invention;

[0026] Figure 3 This is a partial structural schematic diagram of the present invention;

[0027] Figure 4 This is a partial structural schematic diagram of the present invention;

[0028] Figure 5 This is a partial structural schematic diagram of the present invention.

[0029] In the diagram: 1. Pen cap; 2. Pen refill holder; 3. Pen body; 4. Push handle; 5. Small push rod; 6. Large push rod; 7. Push rod drive; 8. Ratchet cover; 9. Viewing window; 10. Push rod rotating cylinder; 11. Memory element; 12. Single-sided gear rod; 13. Double-sided gear ring; 14. Spring; 15. Top cap. Detailed Implementation

[0030] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0031] Applicant's design Figure 1-5 The pen-type syringe shown includes: a pen refill holder 2, one end of which is threaded and the other end is snapped; a pen cap 1, which has a thread inside that matches the thread on the pen refill holder 2 and is rotatably mounted to the pen refill holder 2; a pen body 3, which is snapped to the pen refill holder 2 at one end and has a viewing window 9; and a push rod assembly, which is disposed in the pen body 3 and contains a gear component. Rotating or pressing the push rod assembly causes the gear component in the push rod assembly to produce a sound.

[0032] The pen-type injector with sound-producing effect in this embodiment is further optionally equipped with a plunger assembly including: a plunger cylinder 10, which is disposed in the pen body 3, with one end extending to the outside of the pen body 3 and being mounted to the pen body 3 via a viewing window 9; a single-sided gear rod 12, which is disposed in the plunger cylinder 10, and a memory element 11 is sleeved in the gap between the single-sided gear rod 12 and the plunger cylinder 10, the memory element 11 being fixed at the foremost point in the injection direction; a large plunger 6, which is disposed in the single-sided gear rod 12, with a spring arm mounted at one end of the large plunger 6; the large plunger 6 has two axially arranged grooves, and the inner hole of the single-sided gear rod 12 has ribs along the axial direction, which cooperate with each other to lock the large plunger 6 and the single-sided gear rod 12 in the rotational direction and in the axial direction. The components move in opposite directions; one end of the large push rod 6 is equipped with a single-sided spring tooth, the double-sided toothed ring 13 is equipped with teeth on both sides, and the inner hole of the push rod rotating cylinder 10 has a single-sided spring tooth; the ratchet cover 8 has a ring of teeth inside and is fixed in the mounting position between the pen body 3 and the pen refill holder 2, the spring arm of the large push rod 6 engages with the teeth inside the ratchet cover 8, and the ratchet cover 8 is also equipped with a push rod drive 7; the small push rod 5 is rotatably installed in the large push rod 6 and is pushed by the large push rod 6 to push the liquid in the injection direction, and the small push rod 5 is equipped with a push handle 4; the top cap 15 is installed at one end of the pen body 3 and can be movably locked onto the pen body 3, and a spring 14 is also installed between the top cap 15 and the large push rod 6, and the spring 14 is sleeved on the end of the large push rod 6 where the single-sided spring tooth is located.

[0033] Furthermore, in this embodiment, the pen-type injector with a sound-producing effect is further designed such that when the push rod cylinder 10 is turned clockwise, the single-sided gear rod 12 is locked in the clockwise direction. In this direction, the double-sided gear ring 13 and the single-sided gear rod 12 are designed to be locked to each other, while in the opposite direction they are in a sliding state. The spring teeth in the inner hole of the push rod cylinder 10 and the double-sided gear ring 13 are designed to be sliding to each other in this direction and locked to each other in the opposite direction. Due to the presence of the spring 14, a periodic jumping motion is formed, thereby emitting a rhythmic mechanical sound.

[0034] Furthermore, in this embodiment of the pen-type injector with sound-producing effect, when the push rod cylinder 10 is turned counterclockwise, the spring teeth A of the double-sided gear ring 13 and the spring teeth of the push rod cylinder 10 are locked in this direction. Under the action of the spring 14, the teeth between the single-sided gear rod 12 and the double-sided gear ring 13 periodically jump to each other.

[0035] The pen-type syringe with sound-producing effect in this embodiment goes a step further. When injection is needed, the top cap 15 is pressed and pushed. At this time, all the teeth mesh with each other, forming a torque that overcomes the mutual rotation of the large push rod 6 and the ratchet cover 8. At this time, all the adjustment parts rotate together. The teeth of the adjustment part do not make a sound. The sound produced during injection is the sliding and jumping sound between the large push rod 6 and the ratchet cover 8.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pen-type injector with a sound effect, characterized in that It comprises: a refill holder, one end of which is provided with a thread and the other end is provided with a buckle; a cap, which is provided with a thread inside the cap that is matched with the thread on the refill holder, and is rotatably installed between the refill holder; a pen body, which is installed with the buckle end of the refill holder; a push rod assembly, which is provided in the pen body, and is provided with a gear assembly, and the sound is emitted between the gear assemblies in the push rod assembly by rotating or pressing the push rod assembly.

2. A pen-type injector with sound effect according to claim 1, characterized in that The push rod assembly comprises: a push rod rotating drum, which is provided in the pen body, and one end of the push rod rotating drum extends to the outside of the pen body and is installed with the pen body through a window clamping piece; a single-sided gear rod, which is provided in the push rod rotating drum, and a memory piece is sleeved in the gap between the push rod rotating drum and the single-sided gear rod, and the memory piece is fixed at the front end in the injection direction; a large push rod, which is provided in the single-sided gear rod, and a spring arm is installed at one end of the large push rod; the large push rod is provided with two axial grooves, and the inner hole of the single-sided gear rod is provided with an axial rib, which are matched with each other to lock the large push rod and the single-sided gear rod in the rotation direction and move in the axial direction; a single-sided spring tooth is provided at one end of the large push rod, and a double-sided tooth ring is provided with teeth on both sides, and the inner hole of the push rod rotating drum is provided with a single-sided spring tooth; a ratchet cover, which is provided with a ring of teeth inside the ratchet cover, and is fixed at the installation position of the pen body and the refill holder, the spring arm of the large push rod is matched with the teeth inside the ratchet cover, and the ratchet cover is further provided with a push rod drive; a small push rod, which is rotatably provided in the large push rod, and is pushed to the injection direction to push the liquid medicine, and the small push rod is provided with a push handle; a top cap, which is provided at one end of the pen body and is movably clamped on the pen body, and a spring is further provided between the top cap and the large push rod, and the spring is sleeved at one end of the large push rod provided with a single-sided spring tooth.

3. A pen-type injector with sound effect according to claim 2, characterized in that When the push rod rotating drum is twisted clockwise, the single-sided gear rod is locked in the clockwise direction, the double-sided tooth ring and the single-sided gear rod in this direction are designed to be locked with each other, the reverse direction is a state that can slide with each other, the spring tooth in the inner hole of the push rod rotating drum and the double-sided tooth ring A are designed to slide with each other in this direction, and the reverse direction is a state that is locked with each other, and the existence of the spring forms periodic jumping, thereby emitting a rhythmic mechanical sound.

4. A pen-type injector with sound effect according to claim 2, characterized by When the push rod rotating drum is twisted counterclockwise, the spring tooth A of the double-sided tooth ring and the spring tooth of the push rod rotating drum are locked in this direction, and under the action of the spring, the teeth between the single-sided gear rod and the double-sided tooth ring periodically jump with each other.

5. A pen-type injector with sound effect according to claim 2, characterized by When injection is needed, the top cap is pressed and pushed, at this time all the teeth are engaged with each other, forming a torsional force to overcome the mutual rotation of the large push rod and the ratchet cover, at this time all the adjusting parts are rotated together; the teeth of the adjusting part do not emit sound, and the sound emitted during injection is the sliding and jumping sound between the large push rod and the ratchet cover.

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