Sound feedback structure for injector pen during regulation

Abstract

A sound feedback structure for an injector pen during regulation, comprising a housing (10). The front end of the housing (10) is a proximal end, and the rear end of the housing (10) is a distal end; a screw injection mechanism (14) is provided at the proximal end of the housing (10), and a fixed end cap (20) is provided at the distal end of the housing (10); the fixed end cap (20) is sleeved with a screw support (30); one end of the screw support (30) passes through the fixed end cap (20) and is connected to a dose setting element (50); a dose display support (60) is sleeved on the outer periphery of the screw support (30); and the dose display support (60) is engaged with the fixed end cap (20) by means of ramped ratchet teeth. A user rotates the dose setting element (50) in the forward direction, and under the interaction of ramped surfaces of the ratchet teeth, impact occurs in the engagement area between the dose display support (60) and teeth on the end surface of the fixed end cap (20), thereby producing sound.

Description

Sound feedback structure for an injection pen during adjustment TECHNICAL FIELD

[0001] The present invention relates to the technical field of adjustable dose injection devices, more particularly, it relates to a sound feedback structure for an injection pen during adjustment. BACKGROUND

[0002] The structure of an adjustable dose injection device includes a dose adjustment and injection mechanism and a cassette holder. During dose adjustment, the user rotates a dose adjustment member of the dose adjustment mechanism, and the force applied by the user is stored in a torsion spring for later use. To enable the dose thus adjusted to be ejected, the user presses an ejection button on the proximal end of the syringe, and the torsional force accumulated in the torsion spring is delivered to a drive member to drive the liquid out of the injection device.

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

[0004] When the dose setting member is in the dose setting position, the button is suitable for engaging with the dose setting member, and when the dose setting member is in the dose injection position, the button is suitable for disengaging from the dose setting member. Since disengagement means that the button and the dose setting member can rotate relative to each other when this disengaged state is reached.

[0005] The drive member of the patent is operatively connected to the dose setting member by means of a ratchet, and when the dose setting member is rotated in a first direction to set a dose relative to the housing, the torsion spring is tensioned, and a ratchet arm engages with the teeth on the fixing member to prevent the dose setting member from rotating in the opposite direction. When the dose setting member is rotated in the opposite direction, the ratchet arm disengages from the fixing member to allow the dose setting member to rotate in the opposite direction. When the dose setting member is rotated in the forward or reverse direction, the ratchet arm and the teeth on the fixing member collide with each other to produce a sound, that is, the patent can only know whether the injection pen is rotating in the forward direction or the reverse direction when it is in the injection state, and cannot know whether it is in the injection state or the adjustment state.

[0006] Therefore, how to enable the operator to know whether the injection pen is currently in the injection state or the dose adjustment state has become a problem to be solved at present. SUMMARY

[0007] The injection pen sound feedback structure comprises a shell 10, a front end of the shell 10 is a proximal end, a rear end of the shell 10 is a 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 rod support 30, one end of the screw rod support 30 is connected with a dose setting element 50 through the fixed end cover 20, the outer periphery of the screw rod support 30 is sleeved with a dose display support 60, and the dose display support 60 is engaged with the fixed end cover 20 through the end face inclined tooth, so that the screw rod support 30 can only move forward and backward along the axial direction relative to the dose setting element 50 and the dose display support 60, the dose setting element 50 is connected with the distal end of the shell 10, so that the dose setting element 50 can only rotate relative to the shell 10, a torsion spring 70 is arranged between the screw rod support 30 and the dose display support 60, one end of the torsion spring 70 is connected to the dose display support 60 close to the proximal end of the shell 10, and the other end is connected to the fixed end cover 20, a support return spring 80 is further arranged between the front end of the connection between the dose display support 60 and the screw rod support 30 and the screw injection mechanism 14, the user rotates the dose setting element 50 in the positive direction, drives the screw rod support 30 and the dose display support to rotate synchronously, because the dose display support 60 is engaged with the fixed end cover 20 through the end face inclined tooth, the dose display support 60 and the fixed end cover 20 are relatively rotated under the drive of the dose setting element 50, under the interaction of the end face inclined tooth, the axial relative movement also occurs, under the action of the support return spring 80, the tooth matching position on the end face of the dose display support 60 and the fixed end cover 20 will continuously collide and emit sound.

[0008] The sound feedback structure of an injection pen during adjustment comprises a shell 10, the front end of the shell 10 is the proximal end, the rear end of the shell 10 is the distal end, the proximal end of the shell 10 is provided with a screw rod injection mechanism 14, characterized in that: 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 rod support 30, one end of the screw rod support 30 passes through the fixed end cover 20 and is connected with a dose setting element 50, the outer periphery of the screw rod support 30 is sleeved with a dose display support 60, and the dose display support 60 is engaged with the fixed end cover 20 through the end face with an inclined tooth, so that the screw rod support 30 can only move forward and backward along the axial direction relative to the dose setting element 50 and the dose display support 60, the dose setting element 50 is connected with the distal end of the shell 10, so that the dose setting element 50 can only rotate relative to the shell 10, a torsion spring 70 is arranged between the screw rod support 30 and the dose display support 60, one end of the torsion spring 70 is connected to the dose display support 60 close to the proximal end of the shell 10, and the other end is connected to the fixed end cover 20, a support return spring 80 is further arranged between the front end of the connection between the dose display support 60 and the screw rod support 30 and the screw rod injection mechanism 14, the user rotates the dose setting element 50 forward, drives the screw rod support 30 and the dose display support to rotate synchronously, because the dose display support 60 is engaged with the fixed end cover 20 through the end face with an inclined tooth, the dose display support 60 and the fixed end cover 20 are relatively rotated under the drive of the dose setting element 50, and under the interaction of the end face inclined tooth, the axial relative movement also occurs, under the action of the support return spring 80, the tooth matching position on the end face of the dose display support 60 and the fixed end cover 20 will continuously collide and emit sound.

[0009] In some embodiments, a plurality of first clamping hooks 21 are arranged on the outer periphery of the fixed end cover 20, and corresponding positions of the distal end of the shell 10 are provided with first clamping grooves 11 corresponding to the clamping, the first clamping hooks 21 and the first clamping grooves 11 are matched and clamped.

[0010] Further, the outer periphery of the fixed end cover 20 is further provided with a first protruding block 22, and the corresponding position of the distal end of the shell 10 is provided with a first notch 12, when the shell 10 and the fixed end cover 20 are matched and installed, the first protruding block 22 is clamped with the first notch 12, so as to enhance the connection of the fixed end cover 20 and the shell 10.

[0011] Further, a first torsion spring mounting seat 23 is arranged at the inner wall of the fixed end cover 20, for fixing and mounting one end of the torsion spring.

[0012] In some embodiments, when the dose setting element 50 is turned forward, the dose display holder 60 is engaged with the teeth on the end face of the fixed end cap 20 at an angle of α, which is set to 40°-70°, to provide a better feedback sound.

[0013] In some embodiments, when the dose setting element 50 is turned backward, the dose display holder 60 is engaged with the teeth on the end face of the fixed end cap 20 at an angle of θ, which is set to 1°-40°, to effectively prevent the dose display holder 60 from moving backward after the dose setting is completed.

[0014] In some embodiments, the outer periphery of the dose display holder 60 is provided with a plurality of first ribs 61 arranged in parallel at intervals in the axial direction, which are matched and connected with the first grooves 91 on the inner wall of the dose display element 90, so that the dose display holder 60 can only move forward and backward in the axial direction relative to the dose display element 90, which is rotationally connected with the inner wall of the housing 10, and the housing 10 is provided with a dose display window 13, which is matched with the dose display element 90, for displaying the required injection dose and the injection amount during the injection process.

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

[0016] Further, a spring washer 40 is arranged between the second groove 63 and the holder return spring 80 to reduce the resistance to rotation during dose adjustment.

[0017] Further, the dose display holder 60 is also provided with a second torsional spring mounting seat 62 near the proximal end of the housing 10, which is used to fix the other end of the torsional spring, and the torsional spring 70 is rotated with the dose display holder 60, and the connection end of the second torsional spring mounting seat 62 remains stationary, thereby storing energy.

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

[0019] The beneficial effects of the present application: the present application provides a sound feedback structure when adjusting the injection pen, the user rotates the dose setting element 50 forward, driving the screw support 30 and the dose display support to rotate synchronously, since the dose display support 60 is engaged with the fixed end cover 20 through the end with a beveled ratchet, the dose display support 60 and the fixed end cover 20 rotate relatively under the driving of the dose setting element 50, and also axially relatively move under the interaction of the end ratchet bevel, under the action of the support return spring 80, the tooth fitting place on the end surface of the dose display support 60 and the fixed end cover 20 will continuously collide and emit sound, the structure is simple, easy to assemble, and low in cost, the sound feedback mechanism is placed at the distal end, the collision sound-emitting part is close to the hand used when adjusting the dose, so that the user can more easily perceive it, and the product use experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a cross-sectional view of the overall injection pen of the present application.

[0021] Fig. 2 is an overall exploded view of the sound feedback structure when adjusting the injection pen of the present application.

[0022] Fig. 3 is a cross-sectional view of the sound feedback structure when adjusting the injection pen of the present application.

[0023] Fig. 4 is a right side cross-sectional view of the connection of the dose setting element and the screw support 30 of the sound feedback structure when adjusting the injection pen of the present application.

[0024] Fig. 5 is a side cross-sectional view of the connection of the dose display support and the fixed end cover 20 of the sound feedback structure when adjusting the injection pen of the present application.

[0025] Fig. 6 is a partial enlarged view A of Fig. 5.

[0026] Fig. 7 is a perspective view of the display support.

[0027] Main element symbol explanation housing 10; first clamping groove 11; first notch 12; dose display window 13; screw injection mechanism 14; fixed end cover 20; first clamping hook 21; first protrusion 22; first torsional spring mounting seat 23; screw support 30; second rib 31; third rib 32; spring washer 40; dose setting element 50; third slot 51; dose display support 60; first rib 61; second torsional spring mounting seat 62; second slot 63; torsional spring 70; support return spring 80; dose display element 90; first slot 91.

[0028] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0029] Example 1:

[0030] As shown in Fig. 1 and Fig. 3-5, a sound feedback structure for adjusting an injection pen, comprising a housing 10, the front end of the housing 10 is the proximal end, the rear end of the housing 10 is the distal end, the proximal end of the housing 10 is provided with a screw injection mechanism 14, the distal end of the housing 10 is provided with a fixed end cover 20, the fixed end cover 20 is sleeved with a screw support 30, one end of the screw support 30 passes through the fixed end cover 20 and is connected with a dose setting element 50, the outer periphery of the screw support 30 is sleeved with a dose display support 60 and the dose display support 60 is engaged with the fixed end cover 20 through the end face with inclined teeth, so that the screw support 30 can only move forward and backward along the axial direction relative to the dose setting element 50 and the dose display support 60, the dose setting element 50 is connected with 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 arranged between the screw support 30 and the dose display support 60, one end of the torsion spring 70 is connected to the dose display support 60 close to the proximal end of the housing 10, the other end is connected to the fixed end cover 20, the front end of the connection between the dose display support 60 and the screw support 30 is also provided with a support return spring 80 between the screw injection mechanism 14, the user rotates the dose setting element 50 in the positive direction, driving the screw support 30 and the dose display support to rotate synchronously, since the dose display support 60 is engaged with the fixed end cover 20 through the end face with inclined teeth, the dose display support 60 and the fixed end cover 20 rotate relative to each other under the driving of the dose setting element 50, under the interaction of the end face inclined teeth, axial relative movement also occurs, under the action of the support return spring 80, the tooth matching part on the end face of the dose display support 60 and the fixed end cover 20 will continuously collide and emit sound.

[0031] As shown in FIG. 2 and FIG. 7, the outer periphery of the fixed end cover 20 is provided with a plurality of first clamping hooks 21, and the corresponding position of the distal end of the shell 10 is provided with a first clamping groove 11 corresponding to the clamping, the first clamping hook 21 and the first clamping groove 11 are matched and clamped, the outer periphery of the fixed end cover 20 is also provided with a first protrusion 22, and the corresponding position of the distal end of the shell 10 is provided with a first notch 12, when the shell 10 and the fixed end cover 20 are matched and installed, the first protrusion 22 is clamped with the first notch 12, so as to enhance the connectivity of the fixed end cover 20 and the shell 10, the inner wall of the fixed end cover 20 is provided with a first torsion spring mounting seat 23 for fixing one end of the torsion spring, the outer periphery of the dose display support 60 is provided with a plurality of first rib strips 61 arranged in parallel at intervals in the axial direction, for matching and connecting with the first groove strip 91 of the inner wall of the dose display element 90, so that the dose display support 60 can only move forward and backward along the axial direction relative to the dose display element 90, the dose display element 90 is rotationally connected with the inner wall of the shell 10, and the shell 10 is provided with a dose display window 13 matched with the dose display element 90, for displaying the required injection dose and the injection amount in the injection process, the inner wall of the dose display support 60 close to the proximal end of the shell 10 is provided with a second groove strip 63, and the corresponding position of the screw rod support 30 is provided with a second rib strip 31, the second groove strip 63 and the second rib strip 31 are matched and connected, so that the screw rod support 30 can only move forward and backward along the axial direction relative to the dose display support 60.

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

[0033] As shown in FIG. 3, the second groove strip 63 and the support return spring 80 are provided with a spring gasket 40 therebetween, for reducing the resistance of rotation when adjusting the dose.

[0034] As shown in Fig. 6, when the dose setting element 50 is rotated forward, the dose display holder 60 is engaged with the teeth on the end face of the fixed end cap 20 at an angle of α, and the angle α is set to 40°-70° to provide a better feedback sound, and when the dose setting element 50 is reversed, the dose display holder 60 is engaged with the teeth on the end face of the fixed end cap 20 at an angle of θ, and the angle θ is set to 1°-40° to effectively prevent the dose display holder 60 from being returned after the dose setting is completed.

[0035] The present application provides a sound feedback structure for adjusting an injection pen, the user rotates the dose setting element 50 forward to drive the screw holder 30 and the dose display holder to rotate synchronously, and since the dose display holder 60 is engaged with the fixed end cap 20 through the end teeth with inclined surfaces, the dose display holder 60 and the fixed end cap 20 are relatively rotated under the drive of the dose setting element 50, and also relatively move axially under the interaction of the end teeth inclined surfaces, and under the action of the holder return spring 80, the dose display holder 60 and the teeth on the end face of the fixed end cap 20 are continuously impacted to emit sound, the structure is simple, easy to assemble, and low in cost, the sound emitting feedback mechanism is placed at the distal end, the position of the collision sound is close to the hand used for adjusting the dose, so that the user can more easily perceive it, and the product use experience is improved.

[0036] The above-described embodiments only express several embodiments of the present application, which are described in detail and specifically, but should not be understood as limiting the scope of the present application. It should be noted that for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A sound feedback structure for regulating the time of injection of a pen, comprising a housing (10), the proximal end of the housing (10) being the front end and the distal end of the housing (10) being the rear end, the proximal end of the housing (10) being provided with a screw rod injection mechanism (14), characterized in that: 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 rod support (30), one end of the screw rod support (30) passes through the fixed end cover (20) and is connected with a dose setting element (50), the outer periphery of the screw rod support (30) is sleeved with a dose display support (60), and the dose display support (60) is engaged with the fixed end cover (20) through the end with an inclined surface, so that the screw rod support (30) can only move forward and backward along the axial direction relative to the dose setting element (50) and the dose display support (60), the dose setting element (50) is connected with the distal end of the shell (10), so that the dose setting element (50) can only rotate relative to the shell (10), a torsion spring (70) is arranged between the screw rod support (30) and the dose display support (60), one end of the torsion spring (70) is connected to the dose display support (60) close to the proximal end of the shell (10), and the other end is connected to the fixed end cover (20), the front end of the connection between the dose display support (60) and the screw rod support (30) is also provided with a support return spring (80) between the screw rod injection mechanism (14), the user rotates the dose setting element (50) in the positive direction, drives the screw rod support (30) and the dose display support to rotate synchronously, since the dose display support (60) is engaged with the fixed end cover (20) through the end with an inclined surface, the dose display support (60) and the fixed end cover (20) are relatively rotated under the driving of the dose setting element (50), under the interaction of the inclined surface of the end ratchet, axial relative movement also occurs, under the action of the support return spring (80), the tooth matching part on the end surface of the dose display support (60) and the fixed end cover (20) will continuously collide and emit sound; A plurality of first clamping hooks (21) are arranged on the outer periphery of the fixed end cover (20), corresponding positions of the distal end of the shell (10) are provided with first clamping grooves (11) corresponding to the clamping, the first clamping hooks (21) and the first clamping grooves (11) are matched and clamped; The outer periphery of the fixed end cover (20) is also provided with a first protrusion (22), and the corresponding position of the distal end of the shell (10) is provided with a first notch (12), when the shell (10) and the fixed end cover (20) are matched and installed, the first protrusion (22) is clamped with the first notch (12), so as to enhance the connectivity of the fixed end cover (20) and the shell (10).

2. The sound feedback structure for adjusting the injection pen as claimed in claim 1, wherein: A first torsion spring mounting seat (23) is arranged at the inner wall of the fixed end cover (20), which is used for fixing one end of the torsion spring.

3. The sound feedback structure for adjusting the injection pen as claimed in claim 1, wherein: When the dose setting element (50) is turned forward, the dose display holder (60) is engaged with the teeth on the end face of the fixed end cap (20), the angle between the engagement surface of the teeth of the dose display holder (60) and the fixed end cap (20) is α, the angle α is set to 40°-70°, which provides a better feedback sound, when the dose setting element (50) is reversed, the dose display holder (60) is engaged with the teeth on the end face of the fixed end cap (20), the angle between the engagement surface of the teeth of the dose display holder (60) and the fixed end cap (20) is θ, the angle θ is set to 1°-40°, which can effectively prevent the dose display holder (60) from retreating after the dose setting is completed.

4. The sound feedback structure for adjusting the time of an injection pen according to claim 1, wherein: The outer periphery of the dose display holder (60) is provided with a plurality of first ribs (61) arranged in parallel at intervals in the axial direction, which are matched and connected with the first groove strips (91) on the inner wall of the dose display element (90), so that the dose display holder (60) can only move forward and backward in the axial direction relative to the dose display element (90), the dose display element (90) is rotationally connected with the inner wall of the housing (10), and the housing (10) is provided with a dose display window (13) which is matched with the dose display element (90) and used for displaying the required injection dose and the injection amount during injection.

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

6. An audible feedback structure for an injection pen adjustment time as defined in claim 5, characterized in that: A spring washer (40) is arranged between the second groove strip (63) and the holder return spring (80), which is used to reduce the resistance of rotation during dose adjustment.

7. The sound feedback structure for adjusting the time of an injection pen according to claim 1, wherein: The dose display holder (60) is also provided with a second torsional spring mounting seat (62) near the proximal end of the housing (10), which is used for fixedly mounting the other end of the torsional spring, and the cooperation of the second torsional spring mounting seat (62) makes one end of the torsional spring (70) rotate with the dose display holder (60), and the connection end of the second torsional spring mounting seat (62) remains stationary, thereby storing energy.

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

Images