A sound feedback system for an automatic injection device

Abstract

The present invention provides a sound feedback system for an automatic injection device, the automatic injection device comprises a needle protection sleeve, a trigger sleeve, a return spring, a start sound component, and an end cover, an outer trigger structure is provided on the outer wall of the trigger sleeve, the outer trigger structure is provided with an outer trigger slope, and the inner surface of the start sound component is provided with a first trigger slope. When in use, the needle protection sleeve is pressed down to push the trigger sleeve, the outer trigger slope interacts with the first trigger slope, drives the trigger start sound component to rotate, and finally collides with the end cover to emit a sound signal of "start injection", the triggering of "injection" and the triggering of "sound of start injection" are completed by the same part, thereby ensuring that the sound feedback of start injection is synchronized with the actual start of injection action; the start sound component and the end sound component emit sound by colliding with the same end cover, that is, the two sound signals are homologous, and the feedback of start injection and end injection is clear to the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and more specifically, to a sound feedback system of an automatic injection device. Background Art

[0002] With the explosive population growth, the urban siphon effect, and the increasing shortage of medical resources, the management of chronic diseases will occupy a large amount of medical resources and cause huge economic costs. Society has put forward higher requirements for injection devices used by patients themselves. People hope that the operation of the injection devices is as simple as possible and does not require special training. Traditional injection devices usually require proficiency in the angle and depth of the needle and manual push injection, resulting in a certain difference in the effect of drug injection due to the user's proficiency. With the development of pharmaceutical technology, more and more chronic diseases are treated with periodic medication. The traditional injection method has a cumbersome and complicated injection process. Patients may forget the usage steps before each injection, resulting in the drug failing to exert its due effect.

[0003] The emergence of automatic injection devices provides an effective solution to this problem. People hope that the injection device is easy to operate, has high patient compliance, and has multi-dimensional feedback during the injection process, such as hearing, vision, and touch. Patients can control the entire injection process by obtaining feedback signals, reduce anxiety, and increase confidence; at the same time, the depth of needle insertion is stable and consistent, and no adjustment is required by the patient, and the exposed needle tip before and after the injection is avoided to cause fear to the patient; the injection process does not require manual push injection and the injection time is reasonable; after the injection is completed, it should also have functions such as anti-accidental touch and / or anti-secondary use. At the same time, people pay more attention to personal privacy issues, and have higher requirements for the miniaturization, portability, and usability of products. How to achieve the above functions and performance to meet market demand is currently attracting the attention of more and more engineering and technical personnel.

[0004] For example, Chinese patent CN116942962B discloses an automatic injection pen, including a prefilled syringe module, a guide groove is provided at the guide sleeve, a wing-shaped structure corresponding to the guide groove is provided at the push rod, a spring is provided at the trigger sleeve, and a rib position is provided at the corresponding wing-shaped structure. When the injection pen is in use, the spring is opened and the trigger sleeve moves downward, and the trigger slope of the rib position pushes the wing-shaped structure so that the wing-shaped structure can slide in the guide groove, and the injection spring pushes the push rod for injection, and the spring frame also moves downward, thereby simplifying the number of parts, optimizing the assembly process, improving assembly efficiency, and improving the safety of the assembly process.

[0005] During the injection process, the wing-shaped structure of the push rod moves from the distal end to the proximal end in the guide groove of the guide sleeve. When the injection is completed, the injection push rod moves to the proximal end limit position. At this time, the lower end face of the push rod just moves to the hook on the slender elastic arm of the injection spring bracket, and the restriction on the deformation of the elastic arm in the axial direction (inward) is released. Because the hook surface of the hook of the spring bracket is an inclined surface, under the push of the reverse elastic force of the injection spring, the slender elastic wall of the spring bracket deforms in the axial direction, and the hook surface of the hook is separated from the hook with the platform structure of the guide sleeve. The injection spring bracket is pushed to the distal end by the reverse elastic force of the injection spring, and finally hits the end cover to make a knocking sound, giving the user sound feedback that the injection is completed.

[0006] However, this patent does not provide any sound feedback for the start of injection, so the injector may suddenly perform the injection before being fully prepared, causing a lot of trouble to the patient. Summary of the invention

[0007] In view of this, the present invention proposes a sound feedback system for an automatic injection device, the automatic injection device comprising a needle protection sleeve 2, a trigger sleeve 9, a return spring 11, a start sound component 12, and an end cover 13, an outer wall of the trigger sleeve 9 is provided with an external trigger structure 905, the external trigger structure 905 is provided with an external trigger slope 9051, and the inner surface of the start sound component 12 is provided with a first trigger slope 1204. Before use, a certain distance is formed between the first lower end surface 1207 of the start sound component 12 and the upper end surface 1303 of the end cover 13 by the support structure 1205 and the support arm 1301. When in use, the needle protection sleeve is pressed down. The outer trigger slope 9051 interacts with the first trigger slope 1204 to drive the trigger start sound component 12 to rotate. When the accommodating groove 1206 of the start sound component 12 rotates to the position of the support arm 1301 of the end cover 13, at the same time, the support structure 1205 of the start sound component 12 rotates to the position of the notch groove 1302 of the end cover 13, under the reverse thrust of the return spring 11, it moves downward rapidly, and finally collides with the end cover 13 to send out a sound signal of "start injection". At the same time, the inner trigger structure 902 of the trigger sleeve 9 pushes the wing-shaped structure 601 of the injection push rod 6 to trigger the "injection" action. Triggering "injection" and triggering "the sound of starting injection" are completed by the same part (trigger sleeve 9), thereby ensuring that the sound feedback of starting injection is synchronized with the start of the actual injection action; the start sound component 12 and the end sound component 10 make sounds by hitting the same part (end cover 13), that is, the two sound signals are homologous, giving the patient clear feedback on the start and end of injection.

[0008] A sound feedback system for an automatic injection device, the automatic injection device is divided into two ends, namely a proximal end and a distal end, the automatic injection device comprises a needle protection sleeve 2, a trigger sleeve 9, a return spring 11, a start sound component 12, and an end cover 13, the end of the needle protection sleeve 2 close to the distal end abuts against the end of the trigger sleeve 9 close to the proximal end, characterized in that: the end of the trigger sleeve 9 close to the distal end is sleeved with the start sound component 12, the other end of the start sound component 12 abuts against the end cover 13, the return spring 11 is sleeved on the outside of the trigger sleeve 9 The outer wall of the trigger sleeve 9 is provided with an external trigger structure 905, and the external trigger structure 905 is provided with an external trigger slope 9051. The inner surface of the start sound component 12 is provided with a first trigger slope 1204. The start sound component 12 is provided with a support structure 1205 for supporting the start sound component 12 before triggering. The outer wall of the end cover 13 is provided with a notch groove 1302 for accommodating the support structure 1205 of the start sound component after the triggering is completed. The end cover 13 is provided with a There is a support arm 1301 for supporting the start sound component 12, and the outer surface of the start sound component 12 is provided with a receiving groove 1206, which is used to receive the support arm 1301 of the end cover 13 after the trigger is completed; before use, the support structure 1205 of the start sound component 12 is supported on the upper end surface 1303 of the end cover 13, and the support arm 1301 of the end cover is supported on the first lower end surface 1207 of the start sound component, so that a certain distance is formed between the first lower end surface 1207 of the start sound component 12 and the upper end surface 1303 of the end cover 13. When in use, the needle protection sleeve 2 is pressed down , thereby pushing the trigger sleeve 9, the outer trigger slope 9051 interacts with the first trigger slope 1204, driving the trigger start sound component 12 to rotate, when the support structure 1205 of the start sound component 12 just rotates to the position of the notch groove 1302 of the end cover 13, at the same time, when the accommodating groove 1206 of the start sound component 12 rotates to the position of the support arm 1301 of the end cover 13, the downward limit of the start sound component 12 is released, and under the reverse thrust of the return spring 11, it moves downward rapidly, and finally collides with the end cover 13 to emit a sound signal of "start injection".

[0009] In some embodiments, at least two connecting structures 906 are provided at the bottom of the trigger sleeve 9, and a limiting groove 1203 is provided on the inner surface of the starting sound component 12. The limiting groove 1203 cooperates with the connecting structure 906 before triggering to limit the rotation of the starting sound component 12 relative to the trigger sleeve 9 before triggering.

[0010] In some embodiments, the upper end of the trigger sleeve 9 is provided with a first flange structure 903, the first flange structure 903 is provided with a first upper surface 9031, the needle protection sleeve 2 is provided with an extended cantilever structure 201, the cantilever structure 201 is provided with a second lower end surface 2011, and the upper end of the first flange structure 903 is in conflict with the lower end of the second lower end surface 2011.

[0011] In some embodiments, an elastic arm 901 is provided on the trigger sleeve 9, and a retaining wall structure 904 is provided in the middle part below the elastic arm 901. The start sound component 12 is provided with a second upper surface 1201 and an upper surface flange structure 1202. Before the injection pen is used, one end of the return spring 11 abuts against the lower surface of the retaining wall structure 904 of the trigger sleeve 9, and the other end is sleeved on the upper surface flange structure 1202 of the start sound component 12. The end face of the return spring 11 abuts against the second upper surface 1201 of the start sound component 12. The return spring 11 is confined between the trigger sleeve 9 and the start sound component 12. Before use, the return spring 11 is in its longest position.

[0012] In some embodiments, the automatic injection device also includes an injection push rod 6, an injection spring 7, a guide sleeve 8 and an end sound component 10, the guide sleeve 8 is sleeved on the outside of the end sound component 10, the end of the end sound component 10 close to the distal end passes through the start sound component 12 and is sleeved with the end cover 13, the injection spring 7 is sleeved on the end sound component 10, the injection push rod 6 is sleeved on the outside of the injection spring 7, the injection push rod 6 is cylindrical and has a central axis (X), the injection push rod 6 contains at least two wing-shaped structures 601, and the wing-shaped structures 601 are centrally symmetrically distributed along the central axis (X), the trigger sleeve 9 is slidably assembled on the periphery of the guide sleeve 8, and the trigger sleeve 9 is provided with an internal trigger structure 902, which is used to trigger the wing-shaped structure 601 of the injection push rod 6 to perform an injection action.

[0013] Furthermore, the guide sleeve 8 is provided with a platform structure 801 and a guide groove 802, and the lower end of the guide groove 802 has a limiting surface 8021. Before the injection pen is used, the third upper surface 6011 of the wing-shaped structure 601 of the injection push rod 6 abuts against the limiting surface 8021 at the lower end of the guide groove 802 of the guide sleeve 8. At this time, the injection spring 7 is compressed between the injection push rod 6 and the end sound component 10, and the injection spring 7 is in the shortest compressed position. At this time, the deformation of the end sound component 10 in the axial direction (inward) is limited by the injection push rod 6.

[0014] Furthermore, the third upper surface 6011 of the fin-shaped structure 601 is an inclined surface or an arc surface.

[0015] Furthermore, before use, an inner trigger slope 9021 is provided at the bottom of the inner trigger structure 902, and the distance between the third upper surface 6011 of the wing-shaped structure 601 and the inner trigger slope 9021 is equal to the distance between the outer trigger slope 9051 and the first trigger slope 1204. During use, when the trigger sleeve 9 is pushed to a certain position by the needle protection sleeve 2, the outer trigger slope 9051 of the outer trigger structure 905 of the trigger sleeve 9 will contact the first trigger slope 1204 of the start sound component 12, and the inner trigger slope 9021 of the inner trigger structure 902 of the trigger sleeve 9 will contact the third upper surface 6011 of the wing-shaped structure 601 of the injection push rod 6. At this time, the patient continues to push hard, and the trigger sleeve 9 will continue to move toward the distal end, and the outer trigger slope 9051 of the outer trigger structure 905 will push the start sound component 12 to rotate along its central axis. At the same time, the inner trigger slope 9021 of the inner trigger structure 902 will The injection push rod 6 is pushed to rotate along its central axis. When the needle protection sleeve 2 moves to contact with the shell 4, the shell 4 limits the continued movement of the needle protection sleeve 2. At this time, the outer trigger slope 9051 of the trigger sleeve 9 pushes the start sound component 12 to rotate to the position where the downward limit of the start sound component 12 is released. At this time, the return spring 11 is in the maximum compression position. The start sound component 12 moves downward rapidly under the reverse thrust of the return spring 11, and finally collides with the end cover 13 to send out a sound signal of "start injection". At the same time, the inner trigger slope 9021 of the trigger sleeve pushes the injection push rod 6 to rotate to the maximum position, so that it is out of the limit of the limit straight surface 8021 of the guide groove 802 of the guide sleeve 8. The injection push rod 6 is no longer restricted by the guide sleeve 8. Under the upward elastic force of the injection spring 7, it begins to move toward the proximal end, thereby pushing the piston to cause the drug solution to be injected into the human body, and the injection action begins.

[0016] In some embodiments, the sound ending member 10 comprises a spring guide rod 1002 arranged in the middle and at least two slender elastic arms arranged on the left and right sides, each of the at least two slender elastic arms has a protruding hook 1001, and the hook 1001 is provided with a hooking surface 10011 and an upper inclined surface 10012. There are three protrusions on the inner wall of the elastic arm 901, wherein the first protrusions 9011 on both sides are symmetrically distributed, and the upper and lower surfaces thereof are planes, and the upper and lower surfaces of the second protrusion 9012 in the middle are inclined surfaces. Before the injection pen is used, the The injection spring 7 is sleeved on the spring guide rod 1002 of the end sound component 10, the injection push rod 6 is sleeved on the outside of the injection spring 7, and the injection push rod 6 is located inside the slender elastic arm of the end sound component 10, the hooking surface 10011 of the hook 1001 of the end sound component 10 is hooked on the platform structure 801 on the left and right sides of the guide sleeve 8, and the upper inclined surface 10012 of the hook 1001 is against the lower inclined surface of the middle second protrusion 9012 of the elastic arm 901 on the front and rear sides of the trigger sleeve 9.

[0017] Furthermore, the engaging surface 10011 is an inclined surface, and the end cover 13 is further provided with a first bottom surface 1304. Because the engaging surface 10011 of the hook 1001 of the sound ending member 10 is an inclined surface, under the push of the reverse (downward) elastic force of the injection spring 7, the slender elastic arm of the sound ending member 10 is deformed toward the axial direction, and the engaging surface 10011 of the hook 1001 is separated from the engagement with the platform structure 801 of the guide sleeve 8 (such as Fig.25 As shown in FIG. 1 , the sound member 10 is pushed toward the distal end by the reverse elastic force of the injection spring 7 and finally hits the first bottom surface 1304 of the end cover 13 (as shown in FIG. 1 ). Fig.26 As shown in the figure, an impact sound is emitted to give the user audio feedback that the injection is complete.

[0018] Furthermore, the injection push rod 6 is provided with a notched end face 602. When the injection is completed, the notched end face 602 of the injection push rod 6 just moves to the hook 1001 on the slender elastic arm of the sound ending component 10, and the restriction on the deformation of the slender elastic arm in the axial direction (inward) is released.

[0019] Furthermore, a hollow second bottom surface 1003 is provided at the bottom of the sound-ending component 10 for producing a louder sound when impacted.

[0020] In some embodiments, the automatic injection device further comprises a pen cap 1, a needle protection sleeve 2, a viewing window 3, a shell 4, and a prefilled syringe module 5. Before the injection pen is used (initial state), the prefilled syringe module 5 is pre-installed on the proximal end of the shell 4 and is surrounded by the viewing window 3. The viewing window 3 is a transparent part, and the viewing window 3 is covered by the shell 4. The shell 4 is provided with a window structure, and the drug solution can be seen through the window structure of the shell 4 and the viewing window 3. The needle protection sleeve 2 is slidably assembled between the shell 4 and the viewing window 3, and the pen cap 1 is covered at the opening of the proximal end of the shell 4.

[0021] Beneficial effects of the present invention: The present invention proposes a sound feedback system for an automatic injection device, the automatic injection device comprising a needle protection sleeve 2, a trigger sleeve 9, a return spring 11, a start sound component 12, and an end cover 13, an outer wall of the trigger sleeve 9 is provided with an external trigger structure 905, the external trigger structure 905 is provided with an external trigger slope 9051, the inner surface of the start sound component 12 is provided with a first trigger slope 1204, before use, a certain distance is formed between the first lower end surface 1207 of the start sound component 12 and the upper end surface 1303 of the end cover 13 by the support structure 1205 and the support arm 1301, when in use, the needle protection sleeve 9 is pressed down The protective sleeve 2 pushes the trigger sleeve 9, and the outer trigger slope 9051 interacts with the first trigger slope 1204 to drive the trigger start sound component 12 to rotate. When the accommodating groove 1206 of the start sound component 12 rotates to the position of the support arm 1301 of the end cover 13, at the same time, the support structure 1205 of the start sound component 12 rotates to the position of the notch groove 1302 of the end cover 13, under the reverse thrust of the return spring 11, it moves downward rapidly, and finally collides with the end cover 13 to send out a sound signal of "start injection". At the same time, the inner trigger structure 902 of the trigger sleeve 9 pushes the wing-shaped structure 601 of the injection push rod 6 to trigger the "injection" action. Triggering "injection" and triggering "the sound of starting injection" are completed by the same part (trigger sleeve 9), thereby ensuring that the sound feedback of starting injection is synchronized with the start of the actual injection action; the start sound component 12 and the end sound component 10 make sounds by hitting the same part (end cover 13), that is, the two sound signals are homologous, giving the patient clear feedback on the start and end of injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded view of the overall structure of the automatic injection device of the present invention.

[0023] Figure 2 It is a half-section view of the trigger sleeve of the automatic injection device of the present invention.

[0024] Figure 3It is a cross-sectional view of the trigger sleeve of the automatic injection device of the present invention.

[0025] Figure 4 It is a three-dimensional view of the trigger sleeve of the automatic injection device of the present invention.

[0026] Figure 5 It is a perspective view of the start sound component of the automatic injection device of the present invention.

[0027] Figure 6 It is a schematic structural diagram of the ending sound component of the automatic injection device of the present invention.

[0028] Figure 7 It is a side view of the end cap of the automatic injection device of the present invention.

[0029] Figure 8 FIG. 4 is a top view of the end cap of the automatic injection device of the present invention.

[0030] Fig. 9 It is a schematic structural diagram of the guide sleeve of the automatic injection device of the present invention.

[0031] Fig.10 It is a three-dimensional view of the injection plunger of the automatic injection device of the present invention.

[0032] Fig.11 It is a three-dimensional view of the needle protection sleeve of the automatic injection device of the present invention.

[0033] Fig.12 It is a cross-sectional view of the overall structure of the automatic injection device of the present invention before use.

[0034] Fig.13 for Fig.12 A is a partial enlarged view of the

[0035] Fig.14 It is a half-section view of the overall structure of the automatic injection device of the present invention before use.

[0036] Fig.15 for Fig.14 A partial enlarged view of B.

[0037] Fig.16 It is a cross-sectional view showing the position of the trigger sleeve and the start sound component of the automatic injection device of the present invention before use.

[0038] Fig.17 for Fig.16 A partial enlarged view of C.

[0039] Fig.18 It is a half-section view showing the position of the trigger sleeve and the start sound component of the automatic injection device of the present invention before use.

[0040] Fig.19 It is a half-section view showing the positions of the trigger sleeve and the start sound component when the automatic injection device of the present invention is used.

[0041] Fig. 20 It is a half-section view showing the positions of the trigger sleeve and the injection plunger when the automatic injection device of the present invention is in use.

[0042] Fig.21 It is a half-section view of the overall structure of the automatic injection device of the present invention when in use.

[0043] Fig. 22 It is a half-section view showing the positions of the trigger sleeve and the start sound component of the automatic injection device of the present invention immediately before injection.

[0044] Fig.23 It is a half-section view showing the positions of the trigger sleeve and the injection push rod of the automatic injection device of the present invention immediately before injection.

[0045] Fig.24 It is a cross-sectional view of the overall structure of the automatic injection device of the present invention immediately before injection.

[0046] Fig.25 It is a cross-sectional view of the overall structure of the automatic injection device of the present invention during the injection process.

[0047] Fig.26 It is a cross-sectional view of the overall structure of the automatic injection device of the present invention after the injection is completed.

[0048] Main component symbols

[0049] Pen cap 1; needle protection sleeve 2; cantilever structure 201; second lower end surface 2011; window 3; shell 4; prefilled syringe module 5; injection push rod 6; wing-shaped structure 601; third upper surface 6011; notch end surface 602; injection spring 7; guide sleeve 8; platform structure 801; guide slide groove 802; limit straight surface 8021; trigger sleeve 9; elastic arm 901; first protrusion 9011; second protrusion 9012; inner trigger structure 902; inner trigger inclined surface 9021; first flange structure 903; first upper surface 9031; retaining wall structure 904; outer trigger The trigger structure 905 is as follows: the external trigger slope 9051 is as follows: the connecting structure 906 is as follows: the end sound component 10 is as follows: the hook 1001 is as follows: the hook surface 10011 is as follows: the upper slope 10012 is as follows: the spring guide rod 1002 is as follows: the second bottom surface 1003 is as follows: the return spring 11 is as follows: the start sound component 12 is as follows: the second upper surface 1201 is as follows: the upper surface flange structure 1202 is as follows: the limit groove 1203 is as follows: the first trigger slope 1204 is as follows: the supporting structure 1205 is as follows: the accommodating groove 1206 is as follows: the first lower end surface 1207 is as follows: the end cover 13 is as follows: the supporting arm 1301 is as follows: the notch groove 1302 is as follows: the upper end surface 1303 is as follows: the bottom surface 1304 is as follows:

[0050] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0051] Embodiment 1:

[0052] An audio feedback system for an automatic injection device, such as Figure 1 As shown, the injection pen includes a pen cap 1 , a needle protection sleeve 2 , a window 3 , a shell 4 , a prefilled syringe module 5 , an injection push rod 6 , an injection spring 7 , a guide sleeve 8 , a trigger sleeve 9 , an end sound component 10 , a return spring 11 , a start sound component 12 , an end cover 13 .

[0053] like Figure 2 As shown, the trigger sleeve 9 is provided with an elastic arm 901, and the inner wall of the elastic arm 901 has three protrusions, wherein the first protrusions 9011 on both sides are symmetrically distributed, and the upper and lower surfaces thereof are flat. The upper and lower surfaces of the second protrusion 9012 in the middle are inclined. Figure 5 As shown, the trigger sleeve 9 is provided with an inner trigger structure 902 , and the bottom of the inner trigger structure 902 is provided with an inner trigger slope 9021 for triggering the wing-shaped structure 601 of the injection push rod 6 to perform an injection action.

[0054] like Figure 3 , Figure 4 As shown, the upper end of the trigger sleeve 9 is provided with a first flange structure 903, and the first flange structure 903 is provided with a first upper surface 9031. The middle part of the trigger sleeve is provided with a retaining wall structure 904 below the elastic arm 901. Figure 4 As shown, an external trigger structure 905 is provided on the outer wall of the trigger sleeve, and the external trigger structure 905 is provided with an external trigger slope 9051, which interacts with the first trigger slope 1204 of the start sound component 12 when triggered, and drives the trigger start sound component 12 to rotate. At least two coupling structures 906 are provided at the bottom of the trigger sleeve, which are used to couple with the start sound component 12 before triggering, and limit the rotation of the start sound component 12 relative to the trigger sleeve 9 before triggering.

[0055] like Figure 5As shown, the start sound component 12 is provided with a second upper surface 1201 and an upper surface flange structure 1202 for fixing the return spring 11, the inner surface of the start sound component 12 is provided with a limit groove 1203 and a first trigger slope 1204, the limit groove 1203 cooperates with the connecting structure 906 before triggering to limit the rotation of the start sound component 12, and the first trigger slope 1204 interacts with the outer trigger slope 9051 of the starting sleeve (9) when triggered; the start sound component 12 is provided with a supporting structure 1205, which is used to support the start sound component 12 before triggering so that a certain distance is formed between its first lower end surface 1207 and the upper surface of the end cover 13; the outer surface of the start sound component 12 is provided with a receiving groove 1206, which is used to receive the support arm 1301 of the end cover after the triggering is completed.

[0056] like Figure 6 As shown, the end sound component 10 has at least two slender elastic arms, each of which has a protruding hook 1001, and the hook 1001 is provided with a hooking surface 10011 and an upper inclined surface 10012, and the hooking surface 10011 is also inclined. The end sound component 10 has a slender spring guide rod structure (1002) in the middle, and is provided with a hollow second bottom surface 1003 for making a louder sound when impacted.

[0057] like Figure 7 As shown, the end cover 13 is provided with a support arm 1301 for supporting the start sound component 12; the outer wall of the end cover 13 is provided with a notch groove 1302 for accommodating the support structure 1205 of the start sound component after the trigger is completed. Figure 8 The end cap 13 is further provided with an upper end surface 1303 and a first bottom surface 1304, wherein the upper end surface 1303 is used to collide with the start sound member 12 to produce a start injection sound, and the first bottom surface 1304 is used to collide with the end sound member 10 to produce an injection end sound. Fig. 9 As shown, the guide sleeve 8 is provided with a platform structure 801 and a guide slot 802. The lower end of the guide slot 802 has a limit straight surface 8021. The trigger sleeve 9 is slidably mounted on the outer periphery of the guide sleeve 8.

[0058] like Fig.10 As shown, the injection push rod 6 is cylindrical and has a central axis (X). The injection push rod 6 contains at least two wing-shaped structures 601. The wing-shaped structures 601 are centrally symmetrically distributed along the central axis (X). The third upper surface 6011 of the wing-shaped structure 601 is an inclined surface or an arc surface. The injection push rod 6 has a notched end surface 602. Fig.11 As shown, the needle protection sleeve 2 is provided with an elongated cantilever structure 201, and the cantilever structure 201 is provided with a second lower end surface 2011. The needle protection sleeve is slidably mounted between the housing 4 and the viewing window 3.

[0059] like Fig.12 As shown, the two ends of the injection pen are the proximal end and the distal end. Before the injection pen is used (initial state), the prefilled syringe module 5 is preinstalled at the proximal end of the injection pen and is surrounded by the viewing window 3. The viewing window 3 is a transparent part. The viewing window 3 is covered by the shell 4. The shell 4 is provided with a window structure. The liquid medicine can be seen through the window structure of the shell 4 and the viewing window 3. Fig.12 As shown, in the initial state, the injection spring 7 is sleeved on the spring guide rod 1002 of the end sound component 10, the injection push rod 6 is sleeved on the outside of the injection spring 7, and the injection push rod 6 is located within the slender elastic arm of the end sound component 10.

[0060] like Fig.13 As shown, in this state, the hook surface 10011 of the hook 1001 of the sound ending component 10 is hooked on the platform structure 801 on the left and right sides of the guide sleeve 8, and the upper inclined surface 10012 of the hook 1001 is against the lower inclined surface of the middle second protrusion 9012 of the hook (901) on the front and rear sides of the trigger sleeve 9. At this time, the deformation of the slender elastic arm of the sound ending component 10 in the axial direction (inward) is limited by the injection push rod 6.

[0061] At this time, if Fig.14 , Fig.15 As shown, the third upper surface 6011 of the wing-shaped structure 601 of the injection push rod 6 abuts against the limiting straight surface 8021 at the lower end of the guide groove 802 of the guide sleeve 8. At this time, the injection spring 7 is compressed between the injection push rod 6 and the end sound component 10, and the injection spring 7 is in the shortest compressed position.

[0062] At the same time, if Fig.16 , Fig.17 One end of the return spring 11 is shown to abut against the lower surface of the retaining wall structure 904 of the trigger sleeve 9, and the other end is sleeved on the upper surface flange structure 1202 of the start sound component 12, and its end face is abutted against the second upper surface 1201 of the start sound component 12. The return spring 11 is confined between the trigger sleeve 9 and the start sound component 12 and is in its longest position.

[0063] At the same time, if Fig.18 As shown, the support structure 1205 of the start sound member 12 is supported on the upper end surface 1303 of the end cover 13, and the support arm 1301 of the end cover is supported on the first lower end surface 1207 of the start sound member. Fig.16 , Fig.17As shown, at this time, the lower surface ( 2011 ) of the cantilever structure 201 of the needle protection sleeve 2 abuts against the first upper surface 9031 of the first flange structure 903 of the trigger sleeve 9 .

[0064] When using, first, the patient needs to remove the pen cap 1, then hold the injection pen housing 4 with the hand, align the upper end of the needle protection sleeve 2 with the injection position of the body, and press it hard toward the proximal end, and the needle protection sleeve 2 pushes the trigger sleeve 9 to move toward the distal end. Continue to push hard, the needle will pierce the human body, and when the trigger sleeve 9 is pushed to a certain position by the needle protection sleeve 2, as shown in FIG. Fig.19 As shown, the outer trigger slope 9051 of the outer trigger structure 905 of the trigger sleeve will contact the first trigger slope 1204 of the start sound component 12, as shown in FIG. Fig. 20 As shown, the inner trigger slope 9021 of the inner trigger structure 902 of the trigger sleeve 9 contacts the third upper surface 6011 of the wing-shaped structure 601 of the injection push rod 6 .

[0065] At this time, the patient continues to push hard, and the trigger sleeve 9 will continue to move toward the distal end of the body. The external trigger slope 9051 of the external trigger structure 905 will push the start sound component 12 to rotate along its central axis. At the same time, the internal trigger slope 9021 of the internal trigger structure 902 will push the injection push rod 6 to rotate along its central axis. When the needle protection sleeve 2 moves to contact with the outer shell 4, the outer shell 4 limits the continued movement of the needle protection sleeve 2.

[0066] At this time, if Fig.21 As shown, the outer trigger slope 9051 of the trigger sleeve 9 pushes the start sound component to rotate to a certain position. At this time, the return spring 11 is in the maximum compression position, and the support structure 1205 of the start sound component 12 just rotates to the position of the notch groove 1302 of the end cover 13. At the same time, when the receiving groove 1206 of the start sound component 12 rotates to the position of the support arm 1301 of the end cover 13, the downward limit of the start sound component 12 is released. Under the reverse thrust of the return spring 11, it moves downward rapidly and finally collides with the end cover 13 to emit a sound signal of "start injection". After the collision, the support structure 1205 of the start sound component 12 falls into the notch groove 1302 of the end cover 13, and the receiving groove 1206 of the start sound component 12 accommodates the support arm 1301 of the end cover 13 into the groove, as shown in FIG. Fig. 22 shown.

[0067] At the same time, the inner trigger slope 9021 of the trigger sleeve pushes the injection push rod 6 to rotate to the maximum position, so that it is out of the restriction of the limiting straight surface 8021 of the guide groove 802 of the guide sleeve 8, such as Fig.23As shown. Without the restriction of the guide sleeve 8, the injection push rod 6 starts to move toward the proximal end under the upward elastic force of the injection spring 7, thereby pushing the piston to inject the liquid medicine into the human body. The injection action begins. During the process of injecting the liquid medicine, the injection push rod 6 moves from the distal end to the proximal end. Fig.24 As shown in the figure, when the injection is completed, the injection push rod moves to the proximal end limit position. At this time, the notched end surface 602 of the injection push rod 6 just moves to the hook 1001 on the slender elastic arm of the end sound component 10, and the restriction on the deformation of the slender elastic arm in the axial direction (inward) is released. Because the engaging surface 10011 of the hook 1001 of the end sound component 10 is an inclined surface, under the push of the reverse (downward) elastic force of the injection spring 7, the slender elastic arm of the end sound component 10 is deformed in the axial direction, and the engaging surface 10011 of the hook 1001 is out of engagement with the platform structure 801 of the guide sleeve 8 (as shown in the figure). Fig.25 As shown in FIG. 1 , the sound member 10 is pushed toward the distal end by the reverse elastic force of the injection spring 7 and finally hits the first bottom surface 1304 of the end cover 13 (as shown in FIG. 1 ). Fig.26 The injection push rod (8) emits a knocking sound, giving the user an audio feedback of the end of the injection. Before and after the injection, the injection push rod (8) and the change in the state and position of the end sound component 10 are shown in FIG. Fig.16 , Fig.24 , Fig.25 , Fig.26 .

[0068] Beneficial effects of the present invention: The present invention proposes a sound feedback system for an automatic injection device, the automatic injection device comprising a needle protection sleeve 2, a trigger sleeve 9, a return spring 11, a start sound component 12, and an end cover 13, an outer wall of the trigger sleeve 9 is provided with an external trigger structure 905, the external trigger structure 905 is provided with an external trigger slope 9051, the inner surface of the start sound component 12 is provided with a first trigger slope 1204, before use, a certain distance is formed between the first lower end surface 1207 of the start sound component 12 and the upper end surface 1303 of the end cover 13 by the support structure 1205 and the support arm 1301, when in use, the needle protection sleeve 9 is pressed down The protective sleeve 2 pushes the trigger sleeve 9, and the outer trigger slope 9051 interacts with the first trigger slope 1204 to drive the trigger start sound component 12 to rotate. When the accommodating groove 1206 of the start sound component 12 rotates to the position of the support arm 1301 of the end cover 13, at the same time, the support structure 1205 of the start sound component 12 rotates to the position of the notch groove 1302 of the end cover 13, under the reverse thrust of the return spring 11, it moves downward rapidly, and finally collides with the end cover 13 to send out a sound signal of "start injection". At the same time, the inner trigger structure 902 of the trigger sleeve 9 pushes the wing-shaped structure 601 of the injection push rod 6 to trigger the "injection" action. Triggering "injection" and triggering "the sound of starting injection" are completed by the same part (trigger sleeve 9), thereby ensuring that the sound feedback of starting injection is synchronized with the start of the actual injection action; the start sound component 12 and the end sound component 10 make sounds by hitting the same part (end cover 13), that is, the two sound signals are homologous, giving the patient clear feedback on the start and end of injection.

[0069] 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 system for an automatic injection device, the automatic injection device is divided into two ends, namely a proximal end and a distal end, the automatic injection device comprises a needle protection sleeve (2), a trigger sleeve (9), a return spring (11), a start sound component (12), and an end cover (13), the end of the needle protection sleeve (2) close to the distal end abuts against the end of the trigger sleeve (9) close to the proximal end, characterized in that: The trigger sleeve (9) is sleeved on one end of the start sound component (12) near the distal end, and the other end of the start sound component (12) contacts the end cover (13). The return spring (11) is sleeved on the outer periphery of the trigger sleeve (9), and one end of the return spring (11) contacts the trigger sleeve (9), and the other end contacts the start sound component (12). An external trigger structure (905) is provided on the outer wall of the trigger sleeve (9), and the external trigger structure (905) is provided with an external trigger inclined surface (9051). The inner surface of the start sound component (12) A first trigger slope (1204) is provided, the start sound component (12) is provided with a support structure (1205) for supporting the start sound component (12) before triggering, the outer wall of the end cover (13) is provided with a notch groove (1302) for accommodating the support structure (1205) of the start sound component after the triggering is completed; the end cover (13) is provided with a support arm (1301) for supporting the start sound component (12), and the outer surface of the start sound component (12) is provided with a accommodating groove (1206) for accommodating the support arm (1301) of the end cover (13) after the triggering is completed. 301); before use, the support structure (1205) of the start sound component (12) is supported on the upper end surface (1303) of the end cover (13), and the support arm (1301) of the end cover is supported on the first lower end surface (1207) of the start sound component, so that a certain distance is formed between the first lower end surface (1207) of the start sound component (12) and the upper end surface (1303) of the end cover (13). When in use, the needle protection sleeve (2) is pressed down, thereby pushing the trigger sleeve (9), and the outer trigger slope (9051) and the first trigger slope (1 204) interact with each other, driving the triggering start sound component (12) to rotate. When the supporting structure (1205) of the start sound component (12) just rotates to the position of the notch groove (1302) of the end cover (13), at the same time, when the receiving groove (1206) of the start sound component (12) rotates to the position of the support arm (1301) of the end cover (13), the downward limit of the start sound component (12) is released, and under the reverse thrust of the return spring (11), it moves downward rapidly, and finally collides with the end cover (13) to emit a sound signal of "start injection".

2. The sound feedback system of the automatic injection device according to claim 1, characterized in that: At least two connection structures (906) are provided at the bottom of the trigger sleeve (9), and a limiting groove (1203) is provided on the inner surface of the start sound component (12). The limiting groove (1203) cooperates with the connection structure (906) before triggering to limit the rotation of the start sound component (12) relative to the trigger sleeve (9) before triggering.

3. The sound feedback system of the automatic injection device according to claim 1, characterized in that: The upper end of the trigger sleeve (9) is provided with a first flange structure (903), the first flange structure (903) is provided with a first upper surface (9031), the needle protection sleeve (2) is provided with an extended cantilever structure (201), the cantilever structure (201) is provided with a second lower end surface (2011), and the upper end of the first flange structure (903) is in contact with the lower end of the second lower end surface (2011).

4. The sound feedback system of the automatic injection device according to claim 1, characterized in that: The trigger sleeve (9) is provided with an elastic arm (901), and a retaining wall structure (904) is provided in the middle below the elastic arm (901). The start sound component (12) is provided with a second upper surface (1201) and an upper surface flange structure (1202). Before the injection pen is used, one end of the return spring (11) abuts against the lower surface of the retaining wall structure (904) of the trigger sleeve (9), and the other end is sleeved on the upper surface flange structure (1202) of the start sound component (12). The end surface of the return spring (11) abuts against the second upper surface (1201) of the start sound component (12). The return spring (11) is restricted between the trigger sleeve (9) and the start sound component (12). Before use, the return spring (11) is at its longest position.

5. The sound feedback system of the automatic injection device according to claim 1, characterized in that: The automatic injection device further comprises an injection push rod (6), an injection spring (7), a guide sleeve (8) and an end sound component (10), wherein the guide sleeve (8) is sleeved on the outside of the end sound component (10), and the end sound component (10) near the distal end passes through the start sound component (12) and is sleeved with the end cover (13), the injection spring (7) is sleeved on the end sound component (10), and the injection push rod (6) is sleeved on the outside of the injection spring (7), the injection push rod (6) is cylindrical and has a central axis (X), the injection push rod (6) has at least two wing-shaped structures (601), and the wing-shaped structures (601) are centrally symmetrically distributed along the central axis (X), the trigger sleeve (9) is slidably mounted on the outer periphery of the guide sleeve (8), and the trigger sleeve (9) is provided with an internal trigger structure (902) for triggering the wing-shaped structure (601) of the injection push rod (6) to perform an injection action.

6. The sound feedback system of the automatic injection device according to claim 5, characterized in that: The guide sleeve (8) is provided with a platform structure (801) and a guide slot (802), and the lower end of the guide slot (802) is provided with a limiting straight surface (8021). Before the injection pen is used, the third upper surface (6011) of the wing-shaped structure (601) of the injection push rod (6) abuts against the limiting straight surface (8021) at the lower end of the guide slot (802) of the guide sleeve (8). At this time, the injection spring (7) is compressed between the injection push rod (6) and the end sound component (10), and the injection spring (7) is in the shortest compressed position. At this time, the deformation of the end sound component (10) in the axial direction (inward) is limited by the injection push rod (6).

7. The sound feedback system of the automatic injection device according to claim 5, characterized in that: Before use, the bottom of the inner trigger structure (902) is provided with an inner trigger slope (9021), and the distance between the third upper surface (6011) of the wing-shaped structure (601) and the inner trigger slope (9021) is equal to the distance between the outer trigger slope (9051) and the first trigger slope (1204). When in use, when the trigger sleeve (9) is pushed to a certain position by the needle protection sleeve (2), the outer trigger slope (9051) of the outer trigger structure (905) of the trigger sleeve (9) will contact the start sound component (1204). ), the inner trigger slope (9021) of the inner trigger structure (902) of the trigger sleeve (9) will contact the third upper surface (6011) of the wing-shaped structure (601) of the injection push rod (6). At this time, the patient continues to push hard, the trigger sleeve (9) will continue to move toward the distal end, and the outer trigger slope (9051) of the outer trigger structure (905) will push the start sound component (12) to rotate along its central axis. At the same time, the inner trigger slope (9021) of the inner trigger structure (902) will contact the third upper surface (6011) of the wing-shaped structure (601) of the injection push rod (6). 1) will push the injection push rod (6) to rotate along its central axis. When the needle protection sleeve (2) moves to contact with the housing (4), the housing (4) limits the continued movement of the needle protection sleeve (2). At this time, the outer trigger slope (9051) of the trigger sleeve (9) pushes the start sound component (12) to rotate to the position where the downward limit of the start sound component (12) is released. At this time, the return spring (11) is in the maximum compression position. The start sound component (12) is pushed by the reverse thrust of the return spring (11). , moves downward rapidly, and finally collides with the end cover (13) to emit a sound signal of "start injection". At the same time, the inner trigger slope (9021) of the trigger sleeve pushes the injection push rod (6) to rotate to the maximum position, so that it is free from the restriction of the limit straight surface (8021) of the guide groove (802) of the guide sleeve (8). The injection push rod (6) is no longer restricted by the guide sleeve (8) and begins to move toward the proximal end under the upward elastic force of the injection spring (7), thereby pushing the piston to cause the liquid medicine to be injected into the human body, and the injection action begins.

8. The sound feedback system of the automatic injection device according to claim 5, characterized in that: The end sound component (10) comprises a spring guide rod (1002) arranged in the middle and at least two slender elastic arms arranged on the left and right sides, each of the at least two slender elastic arms has a protruding hook (1001), the hook (1001) is provided with a hooking surface (10011) and an upper inclined surface (10012), and there are three protrusions on the inner wall of the elastic arm (901), wherein the first protrusions (9011) on both sides are symmetrically distributed, and their upper and lower surfaces are planes, and the upper and lower surfaces of the second protrusion (9012) in the middle are inclined surfaces. Before the injection pen is used, the injection spring (7) is sleeved on the end sound The injection push rod (6) is sleeved on the spring guide rod (1002) of the component (10), and the injection push rod (6) is inside the slender elastic arm of the end sound component (10). The hook surface (10011) of the hook (1001) of the end sound component (10) is hooked on the platform structure (801) on the left and right sides of the guide sleeve (8), and the upper inclined surface (10012) of the hook (1001) is against the lower inclined surface of the middle second protrusion (9012) of the elastic arm (901) on the front and rear sides of the trigger sleeve (9).

9. The sound feedback system of the automatic injection device according to claim 8, characterized in that: The engaging surface (10011) is an inclined surface, and the end cover (13) is also provided with a first bottom surface (1304). Because the engaging surface (10011) of the hook (1001) of the end sound component (10) is an inclined surface, under the push of the reverse (downward) elastic force of the injection spring (7), the slender elastic arm of the end sound component (10) is deformed toward the axial direction, and the engaging surface (10011) of the hook (1001) is separated from the engagement with the platform structure (801) of the guide sleeve (8) (as shown in Figure 25). The end sound component (10) is pushed toward the distal end by the reverse elastic force of the injection spring (7), and finally hits the first bottom surface (1304) of the end cover (13) (as shown in Figure 26), emitting an impact sound, giving the user sound feedback of the end of injection.

10. The sound feedback system of the automatic injection device according to claim 5, characterized in that: The injection push rod (6) is provided with a notched end surface (602). When the injection is completed, the notched end surface (602) of the injection push rod (6) just moves to the top of the hook (1001) on the slender elastic arm of the sound ending component (10), and the restriction on the deformation of the slender elastic arm in the axial direction (inward) is released.

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