A sound feedback structure for adjusting an injection pen

Abstract

The present invention provides a sound feedback structure for adjusting an injection pen, comprising a shell, wherein the front end of the shell is a proximal end, the rear end of the shell is a distal end, the distal end of the shell is provided with a fixed end cover, the fixed end cover is sleeved with a screw bracket, one end of the screw bracket passes through the fixed end cover and is connected to a dose setting element, the outer periphery of the screw bracket is sleeved with a dose display bracket, and the dose display bracket and the fixed end cover are meshed with ratchets with inclined surfaces at the end, and a user rotates the dose setting element in a positive direction to drive the screw bracket and the dose display bracket to rotate synchronously, and since the dose display bracket and the fixed end cover are meshed with ratchets with inclined surfaces at the end, the dose display bracket and the fixed end cover rotate relative to each other under the drive of the dose setting element, and axial relative movement also occurs under the interaction of the inclined surfaces of the ratchet teeth at the end, and under the action of a bracket return spring, continuous collision occurs at the tooth matching position on the end surface of the dose display bracket and the fixed end cover, thereby emitting a sound.

Description

Technical Field

[0001] The present invention relates to the technical field of adjustable dose injection devices, and more specifically, to a sound feedback structure during adjustment of an injection pen. Background Art

[0002] The structure of an adjustable dose injection device includes a dose adjustment and injection mechanism and a cartridge bottle fixing mechanism. When adjusting the dose, the user rotates a dose adjustment member of the dose pouring mechanism, and the force applied by the user is stored in a torsion spring for later use. In order to pour out the dose adjusted in this way, the user presses a pouring button on the proximal end of the syringe, and the torsion force accumulated in the torsion spring can be delivered to the drive element to drive the liquid out of the injection device.

[0003] The existing Chinese invention patent with patent publication number CN100571805C discloses an automatic injection device with a top release mechanism, by which a set dose of liquid medicine can be injected from a medicine container through an injection needle via an energy reservoir in the release device, the energy reservoir is suitable for being fully or partially released by actuating a user-operable release element located at or near the upper end of the injection device, the upper end being the end of the injection device opposite to the injection needle, and the energy reservoir is suitable for providing energy by rotating a rotatably mounted dose setting member.

[0004] The button is adapted to engage with the dose setting member when the dose setting member is in the dose setting position, and is adapted to disengage from the dose setting member when the dose setting member is in the dose injection position. By disengagement is meant that when this disengagement state is reached, the button and the dose setting member can rotate relative to each other.

[0005] The driving member of the patent is operably connected to the dose setting member through a ratchet. When the dose is set by rotating the dose setting element relative to the housing in a first direction, the torsion spring is tensioned, and a ratchet arm engages with the teeth on the fixed element to prevent the dose setting element from rotating in the opposite direction. When the dose setting element is rotated in the opposite direction, the ratchet arm disengages from the fixed element to allow the dose setting element to rotate in the opposite direction. When the dose setting element rotates forward or reversely, the ratchet arm and the teeth on the fixed element collide with each other and make a sound. That is to say, the patent can only know whether the injection pen is in forward or reverse rotation in the injection state, but cannot know whether it is in the injection state or the adjustment state.

[0006] Then, how to enable the operator to know whether the injection pen is currently in the injection state or in the dosage adjustment state has become a problem that needs to be solved at present. Summary of the invention

[0007] In view of this, the present invention proposes a sound feedback structure when adjusting an injection pen, comprising a shell 10, wherein the front end of the shell 10 is the proximal end, the rear end of the shell 10 is the distal end, the distal end of the shell 10 is provided with a fixed end cover 20, the fixed end cover 20 is sleeved with a screw bracket 30, one end of the screw bracket 30 passes through the fixed end cover 20 and is connected to a dose setting element 50, the outer periphery of the screw bracket 30 is sleeved with a dose display bracket 60, and the dose display bracket 60 is meshed with the fixed end cover 20 through a ratchet with an inclined surface at the end, so that the screw bracket 30 can only move forward and backward along the axial direction relative to the dose setting element 50 and the dose display bracket 60, the dose setting element 50 is connected to the distal end of the shell 10, so that the dose setting element 50 can only rotate relative to the shell 10, and the screw bracket 30 and the dose display bracket 60 are connected. A torsion spring 70 is provided, one end of which is connected to the proximal end of the dose display bracket 60 close to the housing 10, and the other end is connected to the fixed end cover 20. A bracket return spring 80 is also provided between the front end of the connection between the dose display bracket 60 and the screw bracket 30 and the screw injection mechanism 14. The user rotates the dose setting element 50 in the positive direction to drive the screw bracket 30 and the dose display bracket to rotate synchronously. Since the dose display bracket 60 and the fixed end cover 20 are engaged through the ratchet teeth with inclined surfaces at the end, the dose display bracket 60 and the fixed end cover 20 rotate relative to each other under the drive of the dose setting element 50. Under the interaction of the ratchet inclined surfaces at the end, axial relative movement also occurs. Under the action of the bracket return spring 80, the teeth on the end faces of the dose display bracket 60 and the fixed end cover 20 collide continuously to produce a sound.

[0008] A sound feedback structure for adjusting an injection pen, comprising a shell 10, wherein the front end of the shell 10 is a proximal end, and the rear end of the shell 10 is a distal end, wherein the proximal end of the shell 10 is provided with a screw injection mechanism 14, characterized in that: the distal end of the shell 10 is provided with a fixed end cover 20, wherein the fixed end cover 20 is sleeved with a screw bracket 30, wherein one end of the screw bracket 30 passes through the fixed end cover 20 and is connected with a dose setting element 50, wherein a dose display bracket 60 is sleeved on the outer periphery of the screw bracket 30, and the dose display bracket 60 is meshed with the fixed end cover 20 through a ratchet with an inclined surface at the end, so that the screw bracket 30 can only move forward and backward along the axial direction relative to the dose setting element 50 and the dose display bracket 60, wherein the dose setting element 50 is connected to the distal end of the shell 10, so that the dose setting element 50 can only rotate relative to the shell 10, wherein the screw bracket 30 is sleeved with the dose display bracket 60, wherein the dose display bracket 60 is meshed with the fixed end cover 20 through a ratchet with an inclined surface at the end, wherein the dose setting element 50 is connected to the distal end of the shell 10, wherein the dose setting element 50 can only rotate relative to the shell 10, wherein the screw bracket 30 is sleeved with the dose display bracket 60, wherein the dose display bracket 60 is meshed with the fixed end cover 20 through a ratchet with an inclined surface at the end, wherein the dose setting element 50 is sleeved with the dose display bracket 60 ... A torsion spring 70 is provided between the display bracket 60, one end of the torsion spring 70 is connected to the proximal end of the dose display bracket 60 close to the housing 10, and the other end is connected to the fixed end cover 20. A bracket return spring 80 is also provided between the front end of the connection between the dose display bracket 60 and the screw bracket 30 and the screw injection mechanism 14. The user rotates the dose setting element 50 in the positive direction to drive the screw bracket 30 and the amount display bracket to rotate synchronously. Since the dose display bracket 60 and the fixed end cover 20 are engaged through the ratchet teeth with inclined surfaces at the end, the dose display bracket 60 and the fixed end cover 20 rotate relative to each other under the drive of the dose setting element 50. Under the interaction of the ratchet inclined surfaces at the end, axial relative movement also occurs. Under the action of the bracket return spring 80, the teeth on the end faces of the dose display bracket 60 and the fixed end cover 20 collide continuously to make a sound.

[0009] In some embodiments, a plurality of first hooks 21 are disposed on the outer periphery of the fixed end cover 20 , and a first slot 11 correspondingly engaged therewith is disposed at a corresponding position of the distal end of the shell 10 , and the first hooks 21 are matched and engaged with the first slot 11 .

[0010] Furthermore, a first protrusion 22 is provided on the outer periphery of the fixed end cover 20, and a first notch 12 is provided at a corresponding position of the distal end of the shell 10. When the shell 10 and the fixed end cover 20 are matched and installed, the first protrusion 22 is just engaged with the first notch 12, thereby enhancing the connectivity between the fixed end cover 20 and the shell 10.

[0011] Furthermore, a first torsion spring mounting seat 23 is provided on the inner wall of the fixed end cover 20 for fixing one end of the torsion spring.

[0012] In some embodiments, when the dose setting element 50 rotates forward, the dose display bracket 60 and the teeth on the end surface of the fixed end cover 20 cooperate, and the angle of the contact surface between the dose display bracket 60 and the teeth of the fixed end cover 20 is α, and the angle α is set to 40°-70°, providing a better feedback sound.

[0013] In some embodiments, when the dose setting element 50 is reversed, the dose display bracket 60 and the teeth on the end surface of the fixed end cover 20 are matched, and the angle of the fitting surface of the teeth of the dose display bracket 60 and the fixed end cover 20 is θ, and the angle θ is set to 1°-40°, which can effectively prevent the dose display bracket 60 from retreating after the dose setting is completed.

[0014] In some embodiments, a plurality of first ribs 61 spaced and arranged in parallel are provided along the axial direction on the outer periphery of the dose display bracket 60, which are used to match and connect with the first grooves 91 on the inner wall of the dose display element 90, so that the dose display bracket 60 can only move forward and backward along the axial direction relative to the dose display element 90, and the dose display element 90 is rotatably connected to the inner wall of the housing 10. A dose display window 13 is provided at the housing 10, which cooperates with the dose display element 90 to display the required injection dose and the injection amount during the injection process.

[0015] In some embodiments, a second groove 63 is provided on the inner wall of the dose display bracket 60 near the proximal end of the shell 10, and a second rib 31 is provided at a corresponding position of the screw bracket 30. The second groove 63 is matched and connected with the second rib 31, so that the screw bracket 30 can only move forward and backward along the axial direction relative to the dose display bracket 60.

[0016] Furthermore, a spring washer 40 is provided between the second groove 63 and the support return spring 80 to reduce the resistance to rotation when adjusting the dosage.

[0017] Furthermore, a second torsion spring mounting seat 62 is provided at the proximal end of the dose display bracket 60 close to the shell 10, which is used to fix the other end of the torsion spring and cooperate with the second torsion spring mounting seat 62 so that one end of the torsion spring 70 rotates with the dose display bracket 60 and remains stationary at the connection end with the second torsion spring mounting seat 62, thereby storing energy.

[0018] In some embodiments, the screw bracket 30 is provided with a third rib 32 at the distal end close to the shell 10, and the inner wall of the dose setting element 50 is provided with a third groove 51 at a corresponding position, and the third groove 51 is matched and connected with the third rib 32, so that the screw bracket 30 can only move forward and backward along the axial direction relative to the dose setting element 50.

[0019] Beneficial effects of the present invention: The present invention proposes a sound feedback structure for adjusting an injection pen. The user rotates the dose setting element 50 in the forward direction, driving the screw bracket 30 and the amount display bracket to rotate synchronously. Since the dose display bracket 60 and the fixed end cover 20 are engaged through the ratchet teeth with an inclined surface at the end, the dose display bracket 60 and the fixed end cover 20 rotate relative to each other under the drive of the dose setting element 50. Under the interaction of the ratchet inclined surfaces at the end, axial relative movement also occurs. Under the action of the bracket return spring 80, the dose display bracket 60 and the teeth on the end surface of the fixed end cover 20 collide continuously to produce a sound. The structure is simple, the assembly is simple, and the cost is low. The sound feedback mechanism is placed at the far end, and the collision and sound-producing part is close to the hand used when adjusting the dose, so that the user can perceive it more easily, thereby improving the product usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the entire injection pen of the present invention.

[0021] Figure 2 It is an overall exploded view of the sound feedback structure of the injection pen of the present invention during adjustment.

[0022] Figure 3 It is a cross-sectional view of the sound feedback structure during adjustment of the injection pen of the present invention.

[0023] Figure 4 It is a cross-sectional view of the right side of the connection between the dose setting element of the sound feedback structure of the injection pen of the present invention and the screw bracket 30 during adjustment.

[0024] Figure 5 It is a cross-sectional view of the side surface of the connection between the dose display bracket of the sound feedback structure of the injection pen of the present invention and the fixed end cap 20 during adjustment.

[0025] Figure 6 for Figure 5 A is a partial enlarged view of the

[0026] Figure 7 A perspective view showing the bracket.

[0027] Main component symbols

[0028] Shell 10; first slot 11; first notch 12; dose display window 13; screw injection mechanism 14; fixed end cover 20; first hook 21; first protrusion 22; first torsion spring mounting seat 23; screw bracket 30; second rib 31; third rib 32; spring gasket 40; dose setting element 50; third groove 51; dose display bracket 60; first rib 61; second torsion spring mounting seat 62; second groove 63; torsion spring 70; bracket return spring 80; dose display element 90; first groove 91.

[0029] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION Embodiment 1:

[0030] like Figure 1 and Figure 3-5 As shown, a sound feedback structure for adjusting an injection pen comprises a shell 10, wherein the front end of the shell 10 is a proximal end, and the rear end of the shell 10 is a distal end. The proximal end of the shell 10 is provided with a screw injection mechanism 14, and the distal end of the shell 10 is provided with a fixed end cover 20, wherein the fixed end cover 20 is sleeved with a screw bracket 30, and one end of the screw bracket 30 passes through the fixed end cover 20 and is connected with a dose setting element 50, and a dose display bracket 60 is sleeved on the outer periphery of the screw bracket 30, and the dose display bracket 60 is meshed with the fixed end cover 20 through a ratchet with an inclined surface at the end, so that the screw bracket 30 can only move forward and backward along the axial direction relative to the dose setting element 50 and the dose display bracket 60, and the dose setting element 50 is connected to the distal end of the shell 10, so that the dose setting element 50 can only rotate relative to the shell 10, and the screw bracket 30 is connected to the dose display bracket 60. A torsion spring 70 is provided between the dose display bracket 60 and the screw bracket 30, one end of the torsion spring 70 is connected to the proximal end of the dose display bracket 60 close to the housing 10, and the other end is connected to the fixed end cover 20. A bracket return spring 80 is also provided between the front end of the connection between the dose display bracket 60 and the screw bracket 30 and the screw injection mechanism 14. The user rotates the dose setting element 50 in the positive direction to drive the screw bracket 30 and the dose display bracket to rotate synchronously. Since the dose display bracket 60 and the fixed end cover 20 are engaged with the ratchet teeth with an inclined surface at the end, the dose display bracket 60 and the fixed end cover 20 rotate relative to each other under the drive of the dose setting element 50. Under the interaction of the ratchet inclined surface at the end, axial relative movement also occurs. Under the action of the bracket return spring 80, the teeth on the end surface of the dose display bracket 60 and the fixed end cover 20 collide continuously to make a sound.

[0031] like Figure 2 and Figure 7As shown, a plurality of first hooks 21 are provided on the outer periphery of the fixed end cover 20, and a first slot 11 correspondingly engaged therewith is provided at a corresponding position of the distal end of the shell 10, and the first hook 21 is matched and engaged with the first slot 11, and a first protrusion 22 is further provided on the outer periphery of the fixed end cover 20, and a first notch 12 is provided at a corresponding position of the distal end of the shell 10. When the shell 10 and the fixed end cover 20 are matched and installed, the first protrusion 22 is just engaged with the first notch 12, so as to enhance the connectivity between the fixed end cover 20 and the shell 10, and a first torsion spring mounting seat 23 is provided on the inner wall of the fixed end cover 20 for fixing one end of the torsion spring, and a plurality of spaced parallel springs are provided on the outer periphery of the dose display bracket 60 along the axial direction. The first rib 61 is used to match and connect with the first groove 91 on the inner wall of the dose display element 90, so that the dose display bracket 60 can only move forward and backward along the axial direction relative to the dose display element 90. The dose display element 90 is rotatably connected to the inner wall of the shell 10. The shell 10 is provided with a dose display window 13, which cooperates with the dose display element 90 to display the required injection dose and the injection amount during the injection process. The inner wall of the dose display bracket 60 is provided with a second groove 63 near the proximal end of the shell 10, and the screw bracket 30 is provided with a second rib 31 at a corresponding position. The second groove 63 is matched and connected with the second rib 31, so that the screw bracket 30 can only move forward and backward along the axial direction relative to the dose display bracket 60.

[0032] The dose display bracket 60 is also provided with a second torsion spring mounting seat 62 at the proximal end close to the shell 10, which is used to fix the other end of the torsion spring and cooperate with the second torsion spring mounting seat 62, so that one end of the torsion spring 70 rotates with the dose display bracket 60, and the connection end with the second torsion spring mounting seat 62 remains stationary, thereby storing energy. The screw bracket 30 is provided with a third rib 32 at the distal end close to the shell 10, and a third groove 51 is provided at a corresponding position of the inner wall of the dose setting element 50. The third groove 51 is matched and connected with the third rib 32, so that the screw bracket 30 can only move forward and backward along the axial direction relative to the dose setting element 50.

[0033] like Figure 3 As shown, a spring washer 40 is provided between the second groove 63 and the support return spring 80 to reduce the resistance to rotation when adjusting the dose.

[0034] like Figure 6As shown, when the dose setting element 50 rotates forward, the angle of the contact surface between the dose display bracket 60 and the teeth on the end surface of the fixed end cover 20 is α, and the angle α is set to 40°-70°, providing a better feedback sound. When the dose setting element 50 rotates reversely, the angle of the contact surface between the dose display bracket 60 and the teeth on the end surface of the fixed end cover 20 is θ, and the angle θ is set to 1°-40°, which can effectively prevent the dose display bracket 60 from retreating after the dose setting is completed.

[0035] Beneficial effects of the present invention: The present invention proposes a sound feedback structure for adjusting an injection pen. The user rotates the dose setting element 50 in the forward direction, driving the screw bracket 30 and the amount display bracket to rotate synchronously. Since the dose display bracket 60 and the fixed end cover 20 are engaged through the ratchet teeth with an inclined surface at the end, the dose display bracket 60 and the fixed end cover 20 rotate relative to each other under the drive of the dose setting element 50. Under the interaction of the ratchet inclined surfaces at the end, axial relative movement also occurs. Under the action of the bracket return spring 80, the dose display bracket 60 and the teeth on the end surface of the fixed end cover 20 collide continuously to produce a sound. The structure is simple, the assembly is simple, and the cost is low. The sound feedback mechanism is placed at the far end, and the collision and sound-producing part is close to the hand used when adjusting the dose, so that the user can perceive it more easily, thereby improving the product usage experience.

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A sound feedback structure for adjusting an injection pen, comprising a housing (10), wherein the front end of the housing (10) is a proximal end, and the rear end of the housing (10) is a distal end, and the proximal end of the housing (10) is provided with a screw injection mechanism (14), characterized in that: The distal end of the housing (10) is provided with a fixed end cap (20), the fixed end cap (20) being sleeved with the screw bracket (30), one end of the screw bracket (30) passing through the fixed end cap (20) and connected to the dose setting element (50), the outer periphery of the screw bracket (30) being sleeved with a dose display bracket (60), and the dose display bracket (60) and the fixed end cap (20) being meshed by ratchet teeth with an inclined surface at the end, so that the screw bracket (30) can only move forward and backward along the axial direction relative to the dose setting element (50) and the dose display bracket (60), and the dose setting element ( The dose setting element (50) is connected to the distal end of the housing (10), so that the dose setting element (50) can only rotate relative to the housing (10), a torsion spring (70) is provided between the screw bracket (30) and the dose display bracket (60), one end of the torsion spring (70) is connected to the proximal end of the dose display bracket (60) close to the housing (10), and the other end is connected to the fixed end cover (20), and a bracket return spring (80) is provided between the front end of the connection between the dose display bracket (60) and the screw bracket (30) and the screw injection mechanism (14), so that the user can rotate the dose setting element in the positive direction. The component (50) drives the screw bracket (30) and the dosage display bracket to rotate synchronously. Since the dosage display bracket (60) and the fixed end cover (20) are meshed through the ratchet teeth with inclined surfaces at the end, the dosage display bracket (60) and the fixed end cover (20) rotate relative to each other under the drive of the dosage setting element (50). Under the interaction of the inclined surfaces of the ratchet teeth at the end, axial relative movement also occurs. Under the action of the bracket return spring (80), the tooth matching position on the end surface of the dosage display bracket (60) and the fixed end cover (20) will continuously collide, thereby generating a sound. The fixed end cover (20 ) is provided with a plurality of first hooks (21) on its outer periphery, a first slot (11) correspondingly engaged therewith is provided at a corresponding position of the distal end of the shell (10), and the first hooks (21) are matched and engaged with the first slots (11); a first protrusion (22) is also provided on the outer periphery of the fixed end cover (20), a first notch (12) is provided at a corresponding position of the distal end of the shell (10), and when the shell (10) and the fixed end cover (20) are matched and installed, the first protrusion (22) is just engaged with the first notch (12), thereby enhancing the connectivity between the fixed end cover (20) and the shell (10).

2. The sound feedback structure for adjusting the injection pen according to claim 1, characterized in that: A first torsion spring mounting seat (23) is provided on the inner wall of the fixed end cover (20) and is used for fixing and mounting one end of the torsion spring.

3. The sound feedback structure for adjusting the injection pen according to claim 1, characterized in that: When the dose setting element (50) rotates forward, at the teeth on the end surface of the dose display bracket (60) and the fixed end cover (20), the angle of the contact surface between the teeth of the dose display bracket (60) and the fixed end cover (20) is α, and the angle α is set to 40°-70°, providing a good feedback sound. When the dose setting element (50) rotates reversely, at the teeth on the end surface of the dose display bracket (60) and the fixed end cover (20), the angle of the contact surface between the teeth of the dose display bracket (60) and the fixed end cover (20) is θ, and the angle θ is set to 1°-40°, which can effectively prevent the dose display bracket (60) from retreating after the dose setting is completed.

4. The sound feedback structure for adjusting the injection pen according to claim 1, characterized in that: The outer periphery of the dose display bracket (60) is provided with a plurality of first ribs (61) arranged in parallel and spaced apart in the axial direction, and is used to match and connect with the first grooves (91) on the inner wall of the dose display element (90), so that the dose display bracket (60) can only move forward and backward in the axial direction relative to the dose display element (90); the dose display element (90) is rotatably connected to the inner wall of the housing (10); and a dose display window (13) is provided at the housing (10), which cooperates with the dose display element (90) and is used to display the required injection dose and the injection amount during the injection process.

5. The sound feedback structure for adjusting the injection pen according to claim 1, characterized in that: A second groove (63) is provided on the inner wall of the dose display bracket (60) near the proximal end of the housing (10), and a second rib (31) is provided at a corresponding position of the screw bracket (30), and the second groove (63) is matched and connected with the second rib (31), so that the screw bracket (30) can only move forward and backward along the axial direction relative to the dose display bracket (60).

6. The sound feedback structure for adjusting the injection pen according to claim 5, characterized in that: A spring washer (40) is provided between the second groove (63) and the support return spring (80) to reduce the resistance to rotation when adjusting the dosage.

7. The sound feedback structure for adjusting the injection pen according to claim 1, characterized in that: A second torsion spring mounting seat (62) is further provided at the proximal end of the dose display bracket (60) close to the housing (10) for fixing the other end of the torsion spring and cooperating with the second torsion spring mounting seat (62) so that one end of the torsion spring (70) rotates with the dose display bracket (60) and the end connected to the second torsion spring mounting seat (62) remains stationary, thereby storing energy.

8. The sound feedback structure for adjusting the injection pen according to claim 1, characterized in that: The screw support (30) is provided with a third rib (32) at a distal end close to the housing (10), and a third groove (51) is provided at a corresponding position on the inner wall of the dose setting element (50), and the third groove (51) is matched and connected with the third rib (32), so that the screw support (30) can only move forward and backward along the axial direction relative to the dose setting element (50).

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