Forward and reverse rotation sound production structure for dose adjustment of torsion spring automatic injector

Abstract

The invention discloses a torsion spring automatic injector dose adjustment positive and negative rotation sound production structure, which comprises a knob, a clutch tooth and a jumping tooth, the knob is sleeved on the periphery of the clutch tooth, the upper end face of the clutch tooth is provided with an inner ratchet ring, the knob is internally provided with an inner ring, the upper end face of the inner ring is provided with an outer ratchet ring, and the outer ratchet ring is provided with an outer ratchet ring. The jumping teeth are movably installed in the knob, the jumping teeth are provided with connecting keys or connecting ratchets, the lower end face of each jumping tooth is provided with an inner tooth block and an outer tooth block which are meshed with the inner ratchet ring and the outer ratchet ring respectively, and a plurality of rotating clamping grooves are further formed in the knob. A plurality of rotary clamping blocks clamped into the rotary clamping grooves respectively are arranged on the side edges of the jumping teeth, and the rotary clamping blocks can rotate by a certain angle in the rotary clamping grooves. According to the design, an axial tooth jumping sounding structure is adopted, when the dosage is adjusted, the adjusting knob is rotated clockwise to the desired dosage, the adjusting knob is rotated anticlockwise to return to the zero position, and jumping sounding can be achieved through meshing of spring force in the forward and reverse rotation process.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a forward and reverse sounding structure for adjusting dosage of an automatic syringe. Background Art

[0002] Automatic injectors reduce the difficulty of injection therapy and the pain of patients, and are therefore welcomed by many medical workers and patients. Automatic injectors all include an energy accumulator, which helps users inject a set dose of medicine by releasing the energy of the energy accumulator.

[0003] The invention patent with authorization announcement number CN117563084B discloses a dose adjustment mechanism for an injection pen, including a power rod, a barrel, a ball, a sleeve and a torsion spring; the barrel is fitted onto the power rod, a spiral channel extending along the axis direction of the power rod is formed between the inner barrel wall of the barrel and the outer rod wall of the power rod, and the ball can be rollably arranged in the spiral channel; the barrel and the upper barrel of the injection pen are relatively fixed in the circumferential direction; the upper end of the torsion spring is relatively fixed to the upper barrel, and the lower end is connected to the sleeve; the power rod can rotate relative to the barrel under the action of an external force; the sleeve is circumferentially limitedly connected to the power rod, and the sleeve is used for transmission cooperation with the transmission mechanism of the injection pen. This scheme adopts a transmission mode of cooperation between the power rod, the barrel and the ball, with high transmission accuracy, which can ensure the accuracy of drug dose adjustment, but the dose adjustment mechanism cannot emit a prompt sound during the adjustment process. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art described above and to provide a dosage setting mechanism that can freely adjust the injection dosage and can emit a prompt sound during the adjustment process for easy use.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a torsion spring automatic syringe dosage adjustment forward and reverse sounding structure, including a knob, a clutch tooth and a jumping tooth, the knob is sleeved on the outer periphery of the clutch tooth, the upper end surface of the clutch tooth is provided with an inner ratchet ring, the knob is provided with an inner ring, the upper end surface of the inner ring is provided with an outer ratchet ring, the jumping tooth is movably installed in the knob, the jumping tooth is provided with a connecting key or a connecting ratchet that can be connected to a power piece for synchronous rotation, the lower end surface of the jumping tooth is provided with an inner tooth block and an outer tooth block respectively meshing with the inner ratchet ring and the outer ratchet ring, the knob is also provided with a plurality of rotating slots, and the side of the jumping tooth There are several rotating blocks respectively inserted into the rotating slots, and the rotating blocks can rotate a certain angle in the rotating slots. Both ends of each rotating slot are respectively provided with a positive rotation rib block and a reverse rotation rib block for blocking the rotating blocks. When the jumping tooth is positioned at the first jumping tooth axial position, the inner tooth block is fully meshed with the inner ratchet ring and the positive rotation rib block blocks the rotating block. The knob can drive the jumping tooth to rotate forward. When the jumping tooth is positioned at the second jumping tooth axial position, the inner tooth block is separated from the inner ratchet ring and the reverse rotation rib block blocks the rotating block. The jumping tooth can be freely reversed due to the power storage of the power piece connected to it. This scheme adopts the ratchet matching method. When the ratchet teeth are engaged and collided with each other during rotation adjustment, a prompt sound will be generated.

[0006] Furthermore, a spring is included, and the spring is arranged in the knob, the spring is in contact with the jumping tooth, and the spring provides a spring force to keep the jumping tooth engaged with the clutch tooth.

[0007] Furthermore, the forward rotation surfaces of the teeth of the outer ratchet ring, the inner ratchet ring, the inner tooth block and the outer tooth block are all inclined surfaces, and the angle is preferably 100°, and the reverse rotation surface is a vertical surface. When the inner tooth block and the outer tooth block are fully meshed with the inner ratchet ring and the outer ratchet ring, the vertically arranged reverse rotation surface prevents the jumping tooth from freely reversing due to the power storage of the connected power part; when the knob rotates forward (clockwise), the forward rotation rib block blocks the rotating block, and the jumping tooth is in the first axial position of the jumping tooth, and the reverse rotation surface of the outer ratchet ring rotates toward the reverse rotation surface of the outer tooth block, so that the knob drives the jumping tooth to rotate forward synchronously. During the forward rotation process, the tooth surfaces of the inner tooth block and the inner ratchet ring are continuously meshed and collided, so that when the knob rotates forward, a loud "click" forward rotation reminder sound is emitted; when the knob is reversed (counterclockwise), the outer ratchet The reverse meshing of the ring with the positive rotation surface of the outer tooth block causes the jumping tooth to move in the axial position, and the rotating block rotates a certain angle in the rotating slot. When the reversing rib block blocks the rotating block, the meshing of the outer ratchet ring with the outer tooth block causes the jumping tooth to be positioned in the axial position of the second jumping tooth, the inner ratchet ring and the inner tooth block are separated, and the inner ratchet ring's ability to cut off the reversing surface of the inner tooth block fails. The jumping tooth is free to reverse due to the torque stored in the power part connected to it, and when the rotating block reverses and hits the positive rotation rib block, the jumping tooth is restored to the axial position of the first jumping tooth. In this repeated reversal process, the jumping tooth jumps between the second jumping tooth axial position and the first jumping tooth axial position, and the jumping tooth collides with the end face of the clutch tooth to emit a loud "click" reversal reminder sound.

[0008] Furthermore, in order to make the structure more smoothly used, the outer ratchet ring and the inner ratchet ring are concentrically arranged, and the angle of rotation of the rotating block in the rotating slot is not greater than the angle of rotation of a single ratchet tooth of the inner ratchet ring (or outer ratchet ring), preferably 8° to 15°. The modules of the outer ratchet ring and the inner ratchet ring are the same, and the ratchet tooth height of the outer ratchet ring is greater than the ratchet tooth height of the inner ratchet ring, which is convenient for raising the jumping teeth, preferably the ratchet tooth height of the outer ratchet ring = 1.3mm, and the ratchet tooth height of the inner ratchet ring = 1mm.

[0009] Furthermore, the outer surface of the knob is provided with concave and convex patterns for easy twisting.

[0010] Compared with the prior art, the beneficial effects of the present invention are: the present design adopts an axial tooth jump sounding structure. When adjusting the dosage, the adjustment knob is rotated clockwise to the desired dosage, and counterclockwise rotation can return to the zero position. The spring force can be used for meshing and jumping to produce sound during the forward and reverse rotation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an exploded view of the overall structure of the present invention;

[0012] Figure 2 It is a three-dimensional diagram of the overall structure of the present invention;

[0013] Figure 3-Figure 5 It is a three-dimensional diagram of the clutch teeth, jumping teeth and knob structure of the present invention;

[0014] Figure 6 It is a schematic diagram of the assembly structure of the jumping teeth and the knob of the present invention. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the following specific embodiments are only representative specific embodiments of the present invention, wherein the specific methods, devices, conditions, materials, etc. cited are not intended to limit the present invention or the corresponding specific embodiments.

[0016] A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure, such as Figures 1 to 6 As shown, it includes a knob 1, a button 2, a clutch tooth 3, a jumping tooth 4, a driving rod 5 and a spring 6. The knob 1 is sleeved on the outer periphery of the clutch tooth 3, the upper end surface of the clutch tooth 3 is provided with an inner ratchet ring 31, the knob 1 is provided with an inner ring, the upper end surface of the inner ring is provided with an outer ratchet ring 11, the jumping tooth 4 is movably installed in the knob 1, the spring 6 is provided in the knob 1, the release spring 6 connects the clutch tooth 3 and the jumping tooth 4, the jumping tooth 4 is provided with a connecting key 44 or a connecting ratchet connected to the driving rod 5 for synchronous rotation, the lower end surface of the jumping tooth 4 is provided with an inner tooth block 42 and an outer tooth block 41 respectively meshing with the inner ratchet ring 31 and the outer ratchet ring 1 ... The button 1 is also provided with a plurality of rotating slots, and the sides of the jumping tooth 4 are provided with a plurality of rotating blocks 43 which are respectively inserted into the rotating slots. The rotating blocks 43 can rotate at a certain angle in the rotating slots, and the two ends of each rotating slot are respectively provided with a forward rotation rib block 12 and a reverse rotation rib block 13 which block the rotating block 43. The two ends of the spring 6 respectively contact and connect the button 2 and the jumping tooth 4. The spring 6 provides a spring 6 force to keep the jumping tooth 4 engaged with the clutch tooth 3 and the knob 1, so that the inner ratchet ring 31 and the outer ratchet ring 11 are respectively engaged with the inner tooth block 42 and the outer tooth block 41. When the beating tooth 4 is positioned at the first axial position of the beating tooth, the inner tooth block 42 is fully meshed with the inner ratchet ring 31 and the forward rotation rib block 12 blocks the rotating block 43, and the knob 1 can drive the beating tooth 4 to rotate forward. When the beating tooth 4 is positioned at the second axial position of the beating tooth, the inner tooth block 42 is separated from the inner ratchet ring 31 and the reverse rotation rib block 13 blocks the rotating block 43, and the beating tooth 4 can freely reverse due to the power storage of the power rod 5 connected to it.

[0017] Furthermore, the forward rotation surfaces of the teeth of the outer ratchet ring 11, the inner ratchet ring 31, the inner tooth block 42 and the outer tooth block 41 are all inclined surfaces, and the angle is preferably 100°, and the reverse rotation surfaces are vertical surfaces. When the inner tooth block 42 and the outer tooth block 41 are fully engaged with the inner ratchet ring 31 and the outer ratchet ring 11, the vertically arranged reverse rotation surfaces prevent the jumping tooth 4 from freely reversing due to the accumulation of force by the connected drive rod 5. When the knob 1 rotates forward (clockwise), the forward rotation rib block 12 blocks the rotating block 43, the jumping tooth 4 is in the first jumping tooth axial position, and the reverse surface of the outer ratchet ring 11 rotates against the reverse surface of the outer tooth block 41, so that the knob 1 drives the jumping tooth 4 to rotate forward synchronously. During the forward rotation, the tooth surface of the inner tooth block 42 and the inner ratchet ring 31 are constantly meshed and collided, so that a loud "click" forward rotation reminder sound is emitted when the knob 1 rotates forward; when the knob 1 is reversed (counterclockwise), the outer ratchet ring 11 and the forward rotation surface of the outer tooth block 41 are reversely meshed, so that the jumping tooth 4 moves in the axial position, and the rotating block 43 rotates a certain angle in the rotating slot. When the When the reversing rib block 13 blocks the rotating block 43, the meshing of the outer ratchet ring 11 and the outer tooth block 41 positions the jumping tooth 4 at the second jumping tooth axial position, the inner ratchet ring 31 and the inner tooth block 42 are separated, and the reversing surface cut-off ability of the inner ratchet ring 31 on the inner tooth block 42 fails. The jumping tooth 4 is freely reversed due to the torsion of the driving rod 5. When the rotating block 43 reverses and hits the forward rotating rib block 12, the jumping tooth 4 is restored to the first jumping tooth axial position. In this repeated reversal process, the jumping tooth 4 jumps between the second jumping tooth axial position and the first jumping tooth axial position, and the jumping tooth 4 collides with the end face of the clutch tooth 3 to emit a loud "click" reversal reminder sound.

[0018] Furthermore, in order to make the structure more smoothly used, the outer ratchet ring 11 and the inner ratchet ring 31 are concentrically arranged, and the angle of rotation of the rotating block 43 in the rotating slot is not greater than the angle of rotation of a single ratchet tooth of the inner ratchet ring 31 (or the outer ratchet ring 11), preferably 8° to 15°. The outer ratchet ring 11 and the inner ratchet ring 31 have the same module, and the ratchet tooth height of the outer ratchet ring 11 is greater than the ratchet tooth height of the inner ratchet ring 31, which is convenient for raising the jumping tooth 4, preferably the ratchet tooth height of the outer ratchet ring 11 = 1.3mm, and the ratchet tooth height of the inner ratchet ring 31 = 1mm.

[0019] Furthermore, the outer surface of the knob 1 is provided with concave and convex patterns for easy twisting.

[0020] In the forward rotation of this embodiment, the knob 1 drives the jumping tooth 4 clockwise, and the jumping tooth 4 jumps and rotates along the clutch tooth 3, and the jumping tooth 4 is meshed with the clutch tooth 3 through the spring 6 to make a sound; in the reverse rotation, the knob 1 rotates counterclockwise, first pushing the jumping tooth 4 away, and when it rotates to fit with the jumping tooth 4, it drives the jumping tooth 4 to rotate together and press over the clutch tooth 3, and then meshes with the clutch tooth 3 through the spring 6 to make a sound. It has a simple structure, is easy to produce and assemble, and is suitable for use. This embodiment adopts a structure in which the inner ratchet ring 31 and the outer ratchet ring 11 are double-meshed with the inner tooth block 42 and the outer tooth block 41, which can effectively increase the ratchet contact surface and make the matching structure more stable and reliable.

[0021] The above description is only a preferred embodiment of the present invention, and it cannot be used to limit the scope of the present invention. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the invention description are still within the scope of the patent of the present invention.

Claims

1. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure, characterized in that: The invention comprises a knob, a clutch tooth and a jumping tooth, wherein the knob is sleeved on the outer periphery of the clutch tooth, an inner ratchet ring is arranged on the upper end surface of the clutch tooth, an inner ring is arranged in the knob, an outer ratchet ring is arranged on the upper end surface of the inner ring, the jumping tooth is movably installed in the knob, a connecting key or a connecting ratchet is arranged on the jumping tooth, an inner tooth block and an outer tooth block respectively meshing with the inner ratchet ring and the outer ratchet ring are arranged on the lower end surface of the jumping tooth, a plurality of rotating slots are also arranged in the knob, and the side edges of the jumping teeth are respectively provided with slots for engaging the rotating teeth. There are several rotating blocks of the rotating slot, and both ends of each rotating slot are respectively provided with a forward rotation rib block and a reverse rotation rib block for blocking the rotating block; when the beating tooth is positioned at the first axial position of the beating tooth, the inner tooth block is fully engaged with the inner ratchet ring and the forward rotation rib block blocks the rotating block, and the knob can drive the beating tooth to rotate forward; when the beating tooth is positioned at the second axial position of the beating tooth, the inner tooth block is separated from the inner ratchet ring and the reverse rotation rib block blocks the rotating block, and the beating tooth can reverse freely.

2. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 1, characterized in that: A spring is also included. The spring is arranged in the knob and abuts against the jumping tooth to keep the clutch tooth and the jumping tooth engaged.

3. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 1, characterized in that: The positive rotation surfaces of the tooth shapes of the outer ratchet ring, the inner ratchet ring, the inner tooth block and the outer tooth block are all inclined surfaces, and the negative rotation surfaces are vertical surfaces.

4. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 3, characterized in that: The angle of the positive rotation surface of the tooth profile of the outer ratchet ring, the inner ratchet ring, the inner tooth block and the outer tooth block is 100°.

5. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 3 or 4, characterized in that: The outer ratchet ring and the inner ratchet ring are concentrically arranged, and the rotation angle of the rotating block in the rotating slot is not greater than the rotation angle of a single ratchet tooth of the inner ratchet ring.

6. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 5, characterized in that: The rotation angle of the rotating block in the rotating slot is 8° to 15°.

7. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 5, characterized in that: The rotation angle of the rotating block in the rotating slot is 10°.

8. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 5, characterized in that: The outer ratchet ring and the inner ratchet ring have the same number of teeth, and the ratchet tooth height of the outer ratchet ring is greater than the ratchet tooth height of the inner ratchet ring.

9. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 8, characterized in that: The ratchet teeth of the outer ratchet ring have a tooth height of 1.3 mm, and the ratchet teeth of the inner ratchet ring have a tooth height of 1 mm.

10. A torsion spring automatic syringe dosage adjustment forward and reverse sounding structure according to claim 1, characterized in that: The outer surface of the knob is provided with concave and convex patterns.

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