A torsion spring automatic injector dose setting positive and negative inversion sound structure

Abstract

The utility model discloses a torsion spring automatic injector dose sets positive and negative rotation sound production structure, including knob, clutch tooth and jumping tooth, the knob is set in the outer periphery of clutch tooth, the upper end surface of clutch tooth is equipped with the inner ratchet ring, the inside ring is equipped in the knob, the upper end surface of inside ring is equipped with the outer ratchet ring, jumping tooth movable mounting in the knob, be equipped with the connecting key or the connecting ratchet on jumping tooth, the lower end surface of jumping tooth is equipped with respectively meshing the inner tooth block and the outer tooth block of inner ratchet ring and outer ratchet ring, still be equipped with a plurality of rotation clamping groove in the knob, the side of jumping tooth is equipped with respectively a plurality of rotation clamping block of clamping into rotation clamping groove, rotation clamping block can rotate a certain angle in rotation clamping groove. The design adopts axial tooth jumping sound production structure, when adjusting dose, clockwise rotation adjusting knob to the dose that wants, counterclockwise rotation can return zero, can through the engagement jumping sound production of spring force in the positive and negative rotation process.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an automatic injector dosage adjustment forward and reverse rotation sound generation structure. Background Technology

[0002] Automated injectors have reduced the difficulty of administering injections and decreased patient pain, making them popular with many healthcare professionals and patients. Automated injectors all include a accumulator; by releasing the energy in the accumulator, they help the user inject a pre-set dose of medication.

[0003] Patent CN117563084B discloses a dosage adjustment mechanism for an injection pen, comprising a power rod, a cylinder, a ball bearing, a sleeve, and a torsion spring. The cylinder is fitted over the power rod, and a spiral channel extending along the axis of the power rod is formed between the inner wall of the cylinder and the outer wall of the power rod. The ball bearing is rotatably disposed within the spiral channel. The cylinder and the upper barrel of the injection pen are circumferentially fixed relative to each other. The upper end of the torsion spring is fixed relative to the upper barrel, and the lower end is connected to the sleeve. The power rod can rotate relative to the cylinder under external force. The sleeve is circumferentially limited and connected to the power rod, and the sleeve is used for transmission cooperation with the transmission mechanism of the injection pen. This solution uses a transmission method involving a power rod, cylinder, and ball bearing, which provides high transmission accuracy and ensures precise drug dosage adjustment. However, this dosage adjustment mechanism cannot emit an audible alert during adjustment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the existing technology described above by providing a dosage adjustment mechanism that allows for free adjustment of the injection dose and provides a prompting sound during the adjustment process for ease of use.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a torsion spring automatic injector dosage adjustment forward and reverse reversal sound structure, including a knob, a clutch tooth, and a ratchet tooth. The knob is sleeved on the outer periphery of the clutch tooth. The upper end face of the clutch tooth is provided with an inner ratchet ring. The knob is provided with an inner ring. The upper end face of the inner ring is provided with an outer ratchet ring. The ratchet tooth is movably installed in the knob. The ratchet tooth is provided with a connecting key or connecting ratchet tooth that can connect to a power component for synchronous rotation. The lower end face of the ratchet tooth is provided with an inner tooth block and an outer tooth block that respectively mesh with the inner and outer ratchet rings. The knob is also provided with several rotating slots. The side of the ratchet tooth... The device is equipped with several rotating blocks that are respectively engaged in the rotating slots. Each rotating block can rotate a certain angle within the slots. Each rotating slot has a forward-rotating rib and a reverse-rotating rib at both ends to stop the rotating block. When the jumping tooth is positioned at the axial position of the first jumping tooth, the inner tooth block is fully engaged with the inner ratchet ring, and the forward-rotating rib stops the rotating block. The knob can drive the jumping tooth to rotate forward. When the jumping tooth is positioned at the axial position of the second jumping tooth, the inner tooth block separates from the inner ratchet ring, and the reverse-rotating rib stops the rotating block. The jumping tooth can freely reverse due to the stored force of its connected power component. This design uses a ratchet engagement method; during rotational adjustment, the meshing and collision of the ratchet teeth will produce a beeping sound.

[0006] Furthermore, it also includes a spring disposed within the knob, the spring abutting against the pawl, the spring providing spring force to maintain the pawl engaging with the clutch tooth.

[0007] Furthermore, the forward rotation surfaces of the teeth of the outer ratchet ring, inner ratchet ring, inner tooth block, and outer tooth block are all inclined planes, preferably at an angle of 100°, while the reverse rotation surfaces are vertical. When the inner tooth block and outer tooth block are fully engaged with the inner and outer ratchet rings, the vertically arranged reverse rotation surfaces prevent the jumping teeth from freely reversing due to the power stored in the connected power component. When the knob rotates clockwise, the forward rotation rib block blocks the rotating block, and the jumping teeth are at the axial position of the first jumping teeth. The reverse rotation surface of the outer ratchet ring rotates facing the reverse rotation surface of the outer tooth block, thereby causing the knob to drive the jumping teeth to rotate synchronously. During the clockwise rotation, the tooth surfaces of the inner tooth block and the inner ratchet ring continuously mesh and collide, causing the knob to emit a loud "click-click" clockwise reminder sound when rotating clockwise. When the knob rotates counterclockwise, the outer ratchet... The reversible engagement of the outer ratchet ring and the outer toothed block causes the jumping tooth to move axially. The rotating block rotates at a certain angle within the rotating slot. When the reversible rib blocks the rotating block, the engagement of the outer ratchet ring and the outer toothed block positions the jumping tooth at the axial position of the second jumping tooth. The inner ratchet ring and the inner toothed block separate, and the inner ratchet ring's ability to block the reversible surface of the inner toothed block fails. The jumping tooth freely reverses due to the torque stored in its connected power component. When the rotating block reverses and touches the forward-rotating rib, the jumping tooth returns to its original position at the axial position of the first jumping tooth. This reversal process is repeated, during which the jumping tooth jumps between the axial positions of the second and first jumping teeth. The collision between the jumping tooth and the end face of the clutch tooth produces a loud "click-click" reversal reminder sound.

[0008] Furthermore, for smoother use of the structure, the outer and inner ratchet rings are concentrically arranged, and the rotation angle of the rotating block within the rotating slot is no greater than the rotation angle of a single ratchet tooth of the inner (or outer) ratchet ring, preferably 8° to 15°. The outer and inner ratchet rings have the same module, and the ratchet tooth height of the outer ratchet ring is greater than that of the inner ratchet ring, facilitating the lifting of the jumping teeth. Preferably, the ratchet tooth height of the outer ratchet ring is 1.3 mm, and the ratchet tooth height of the inner ratchet ring is 1 mm.

[0009] Furthermore, the outer surface of the knob is provided with raised and recessed textures for easy turning.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This design adopts an axial toothed jumping sound-generating structure. When adjusting the dosage, the adjustment knob can be rotated clockwise to the desired dosage, and rotated counterclockwise to return to the zero position. During the forward and reverse rotation, the sound can be generated by the engagement of the spring force. Attached Figure Description

[0011] Figure 1 This is an exploded view of the overall structure of this utility model;

[0012] Figure 2 This is a perspective view of the overall structure of this utility model;

[0013] Figures 3-5 This is a perspective view of the clutch teeth, jumping teeth, and knob structure of this utility model;

[0014] Figure 6 This is a schematic diagram of the assembly structure of the jumping teeth and knob of this utility model. Detailed Implementation

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

[0016] A torsion spring automatic injector with a forward and reverse rotation sound-generating structure for dosage adjustment, such as... Figures 1 to 6 As shown, the device includes a knob 1, a button 2, a clutch tooth 3, a ratchet tooth 4, a drive rod 5, and a spring 6. The knob 1 is fitted around the outer periphery of the clutch tooth 3. The upper end face of the clutch tooth 3 has an inner ratchet ring 31. The knob 1 has an inner ring, and the upper end face of the inner ring has an outer ratchet ring 11. The ratchet tooth 4 is movably installed inside the knob 1. The spring 6 is located inside the knob 1. The release spring 6 connects the clutch tooth 3 and the ratchet tooth 4. The ratchet tooth 4 has a connecting key 44 or a connecting ratchet tooth that connects to the drive rod 5 for synchronous rotation. The lower end face of the ratchet tooth 4 has an inner tooth block 42 and an outer tooth block 41 that respectively mesh with the inner ratchet ring 31 and the outer ratchet ring 11. The button 1 is also provided with several rotating slots. The side of the jumping tooth 4 is provided with several rotating blocks 43 that are respectively inserted into the rotating slots. The rotating blocks 43 can rotate a certain angle in the rotating slots. Each of the rotating slots has a forward rotation rib 12 and a reverse rotation rib 13 at both ends to block the rotating blocks 43. The two ends of the spring 6 are respectively connected to the button 2 and the jumping tooth 4. The spring 6 provides spring 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 jumping tooth 4 is positioned at the first jumping tooth axial position, the inner tooth block 42 is fully engaged with the inner ratchet ring 31 and the forward rotation rib block 12 blocks the rotating block 43. The knob 1 can drive the jumping tooth 4 to rotate forward. When the jumping tooth 4 is positioned at the second jumping tooth axial position, 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. The jumping tooth 4 can freely reverse due to the power stored in the power rod 5 connected to it.

[0017] Furthermore, the forward rotation surfaces of the teeth of the outer ratchet ring 11, inner ratchet ring 31, inner tooth block 42, and outer tooth block 41 are all inclined planes, preferably with an angle of 100°, and the reverse rotation surfaces are vertical planes. When the inner tooth block 42 and outer tooth block 41 are fully engaged with the inner ratchet ring 31 and outer ratchet ring 11, the vertically arranged reverse rotation surfaces prevent the jumping tooth 4 from freely reversing due to the force stored in the connected drive rod 5. When the knob 1 rotates clockwise, the clockwise rotating block 12 blocks the rotating latch 43, the jumping tooth 4 is in the axial position of the first jumping tooth, and the reverse face of the outer ratchet ring 11 rotates facing the reverse face of the outer tooth block 41, so that the knob 1 drives the jumping tooth 4 to rotate clockwise synchronously. During the clockwise rotation, the inner tooth block 42 and the tooth surface of the inner ratchet ring 31 continuously mesh and collide, so that the knob 1 will emit a loud "click-click" clockwise reminder sound when it rotates clockwise; when the knob 1 rotates counterclockwise, the outer ratchet ring 11 and the clockwise rotating face of the outer tooth block 41 mesh counterclockwise, so that the jumping tooth 4 moves in the axial position, and the rotating latch 43 rotates a certain angle in the rotating latch groove. When the reversing rib 13 blocks the rotating block 43, the engagement of the outer ratchet ring 11 and the outer tooth block 41 causes the jumping tooth 4 to be positioned in the axial position of the second jumping tooth. The inner ratchet ring 31 and the inner tooth block 42 separate, and the inner ratchet ring 31 loses its ability to block the reversing surface of the inner tooth block 42. The jumping tooth 4 is free to reverse due to the torque of the drive rod 5. When the rotating block 43 reverses and touches the forward rotating rib 12, the jumping tooth 4 returns to its position in the axial position of the first jumping tooth. During the repeated reversal process, the jumping tooth 4 jumps between the axial position of the second jumping tooth and the axial position of the first jumping tooth. The collision between the jumping tooth 4 and the end face of the clutch tooth 3 will produce a loud "click-click" reversal reminder sound.

[0018] Furthermore, for smoother use of the structure, the outer ratchet ring 11 and the inner ratchet ring 31 are concentrically arranged. The rotation angle of the rotating block 43 within the rotating slot is no greater than the rotation angle 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 that of the inner ratchet ring 31, which facilitates raising the jumping tooth 4. Preferably, the ratchet tooth height of the outer ratchet ring 11 is 1.3 mm, and the ratchet tooth height of the inner ratchet ring 31 is 1 mm.

[0019] Furthermore, the outer surface of the knob 1 is provided with raised and recessed textures for easy turning.

[0020] In this embodiment, when rotating clockwise, knob 1 drives the ratchet 4, which rotates along the clutch tooth 3. The spring 6 engages the ratchet 4 with the clutch tooth 3, producing a sound. In reverse rotation, knob 1 rotates counter-clockwise, first pushing the ratchet 4 away. When it engages with the ratchet 4, it drives the ratchet 4 to rotate and press against the clutch tooth 3, then engages with the clutch tooth 3 through the spring 6, producing a sound. Its structure is simple, easy to manufacture and assemble, and suitable for use. This embodiment employs a double-meshing structure of inner ratchet ring 31 and outer ratchet ring 11 with inner tooth block 42 and outer tooth block 41, which effectively increases the ratchet contact surface, making the mating structure more stable and reliable.

[0021] The above description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. All simple equivalent changes and modifications made in accordance with the scope of the present utility model patent application and the description of the utility model shall still fall within the scope of the present utility model patent.

Claims

1. A torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation structure, characterized in that, The device includes a knob, a clutch tooth, and a ratchet tooth. The knob is fitted around the outer periphery of the clutch tooth. The upper end face of the clutch tooth has an inner ratchet ring. The knob has an inner ring, and the upper end face of the inner ring has an outer ratchet ring. The ratchet tooth is movably mounted inside the knob. The ratchet tooth has a connecting key or connecting ratchet teeth. The lower end face of the ratchet tooth has an inner tooth block and an outer tooth block that respectively engage the inner and outer ratchet rings. The knob also has several rotating slots. The sides of the ratchet tooth have slots for respectively engaging the knob. The rotating slot has several rotating blocks, and each of the rotating slots has a forward-rotating rib block and a reverse-rotating rib block at both ends to block the rotating blocks. When the jumping tooth is positioned at the axial position of the first jumping tooth, the inner tooth block is fully engaged with the inner ratchet ring and the forward-rotating rib block blocks the rotating blocks, and the knob can drive the jumping tooth to rotate forward. When the jumping tooth is positioned at the axial position of the second jumping tooth, the inner tooth block is separated from the inner ratchet ring and the reverse-rotating rib block blocks the rotating blocks, and the jumping tooth can rotate freely in reverse.

2. The torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation structure according to claim 1, characterized in that, It also includes a spring disposed inside the knob, the spring abutting against the pawl teeth to keep the clutch teeth and the pawl teeth engaged.

3. The torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation structure according to claim 1, characterized in that, The forward rotation surfaces of the teeth of the outer ratchet ring, inner ratchet ring, inner tooth block, and outer tooth block are all inclined planes, while the reverse rotation surfaces are vertical planes.

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

5. The torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation 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 within the rotating slot is not greater than the rotation angle of a single ratchet tooth of the inner ratchet ring.

6. The torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation structure according to claim 5, characterized in that, The rotating block rotates at an angle of 8° to 15° within the rotating slot.

7. The torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation structure according to claim 5, characterized in that, The rotating block rotates at an angle of 10° within the rotating slot.

8. The torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation structure according to claim 5, characterized in that, The outer and inner ratchet rings have the same module, and the ratchet tooth height of the outer ratchet ring is greater than that of the inner ratchet ring.

9. The torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation structure according to claim 8, characterized in that, The outer ratchet ring has a ratchet tooth height of 1.3 mm, and the inner ratchet ring has a ratchet tooth height of 1 mm.

10. The torsion spring automatic injector dosage adjustment forward and reverse rotation sound generation structure according to claim 1, characterized in that, The outer surface of the knob is textured.

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