CN115887829A - Sound feedback mechanism, injection driving mechanism and automatic injection device - Google Patents

Sound feedback mechanism, injection driving mechanism and automatic injection device Download PDF

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Publication number
CN115887829A
CN115887829A CN202211485881.1A CN202211485881A CN115887829A CN 115887829 A CN115887829 A CN 115887829A CN 202211485881 A CN202211485881 A CN 202211485881A CN 115887829 A CN115887829 A CN 115887829A
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China
Prior art keywords
ring
energy storage
injection
push rod
limiting
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CN202211485881.1A
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Chinese (zh)
Inventor
刘孝永
赵剑
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Suzhou Hengrui Hongyuan Medical Technology Co ltd
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Suzhou Hengrui Hongyuan Medical Technology Co ltd
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Priority to CN202211485881.1A priority Critical patent/CN115887829A/en
Publication of CN115887829A publication Critical patent/CN115887829A/en
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Abstract

The invention discloses a sounding feedback mechanism, an injection driving mechanism and an automatic injection device, and relates to the technical field of automatic injectors. This vocal feedback mechanism is used for automatic injection device, and automatic injection device includes the stand pipe, and vocal feedback mechanism includes the vocal ring, is in the first energy storage component and the vocal feedback subassembly of energy storage state, and the first energy storage component that is in the energy storage state provides kinetic energy for the vocal ring. The sound production feedback component comprises a guide surface and a termination surface, wherein the guide surface comprises a first abutting surface, a second abutting surface and an inclined surface located between the first abutting surface and the second abutting surface. The sounding ring generates a starting prompt sound when the mounting surface of the self-guide pipe moves to the first abutting surface in the moving process, the sounding ring moves on the inclined surface to drive the sounding ring to rotate so as to enable the first energy storage element to continue energy storage, and the sounding ring generates a stopping prompt sound when the second abutting surface moves to the stopping surface. The sound feedback mechanism improves the reliability and stability of sound feedback, and reduces the cost.

Description

Sound feedback mechanism, injection driving mechanism and automatic injection device
Technical Field
The invention relates to the technical field of automatic injectors, in particular to a sounding feedback mechanism, an injection driving mechanism and an automatic injection device.
Background
The automatic injector is used for infusing liquid medicine into a body of a person receiving injection, the automatic injector comprises an injection mechanism containing the liquid medicine, one end of the injection mechanism is provided with an injection needle, the other end of the injection mechanism is provided with a piston, one end of the piston, which is far away from the injection needle, is provided with an injection driving mechanism, and the injection driving mechanism is used for driving the piston to complete the pushing action of the automatic injector on the liquid medicine. The injection operation of an auto-injector is usually performed by the recipient alone, so how to achieve better prompting during the injection process is important for the recipient to pay real-time attention to the injection process.
Prior art auto-injectors typically have multidimensional feedback during the injection process, such as: the auditory, visual and tactile senses, and the person receiving the injection can control the whole injection process by acquiring a feedback signal. However, in the prior art, multidimensional feedback is mostly completed by depending on electronic components, so that the automatic injector needs to be supplied with power by a battery, and the electronic components are easily influenced by the environment, are easy to age, are not easy to store for a long time, and are difficult to ensure the stability and the reliability of the automatic injector; and the cost is high.
Disclosure of Invention
One of the objectives of the present invention is to provide a sound feedback mechanism and an automatic injection device, wherein the automatic injection device using the sound feedback mechanism not only can realize the control of the injector on the injection process, but also can ensure the stability and reliability of the automatic injection device, and has low cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the sounding feedback mechanism is used for an automatic injection device, the automatic injection device comprises a guide pipe, the sounding feedback mechanism comprises a sounding ring, a first energy storage element in an energy storage state and a sounding feedback assembly, and the first energy storage element in the energy storage state provides kinetic energy for the sounding ring; the sound production feedback subassembly includes spigot surface and termination face, wherein, the spigot surface includes first butt face, second butt face and is located first butt face with inclined plane between the second butt face, the sound production ring is in the motion in-process, from the installation face of stand pipe moves extremely produce the initial warning sound during first butt face, the sound production ring is in move the drive on the inclined plane the sound production ring rotation energy makes the first energy storage component that is in the energy storage state continues the energy storage, the sound production ring from the second butt face moves extremely produce the termination warning sound during the termination face.
As an alternative of vocal feedback mechanism, the surface of vocal ring is provided with the lug, the lug includes the vocal feedback face, the vocal feedback face does the lug with a side that the vocal ring is connected, the vocal feedback face can with the installation face butt, and can in proper order with the spigot surface with the cooperation of termination face.
As an alternative of the sound feedback mechanism, the automatic injection device comprises a push rod, the push rod is arranged in the guide pipe, the sound production ring and the first energy storage element in the energy storage state are sleeved outside the push rod, one end of the first energy storage element in the energy storage state is fixed on the sound production ring, and the other end of the first energy storage element is fixed on the push rod.
As an alternative of the sound feedback mechanism, the first energy storage element in the energy storage state is a torsion spring, a first fixing hole is formed in the projection, a second fixing hole is formed in the periphery of the push rod, the axis of the first fixing hole is parallel to the axis of the guide pipe, and one end of the torsion spring is inserted into the first fixing hole while the other end of the torsion spring is inserted into the second fixing hole.
As an alternative of vocal feedback mechanism, the surface interval of push rod is provided with first spacing portion and the spacing portion of second, the vocal ring with the first energy storage component that is in the energy storage state locates first spacing portion with between the spacing portion of second, the vocal ring is kept away from the one end of the first energy storage component that is in the energy storage state with the cooperation of first spacing portion, the first energy storage component that is in the energy storage state keeps away from the one end of vocal ring with the cooperation of the spacing portion of second, the second fixed orifices set up in the spacing portion of second.
As an alternative of the sounding feedback mechanism, the pipe wall of the guide pipe is provided with a plurality of guide surfaces in sequence between the installation surface and the termination surface, and in the working process, the sounding ring sequentially collides with each guide surface to generate continuous signal feedback.
An autoinjector comprising an audible feedback mechanism as described in any of the previous aspects.
Another object of the present invention is to provide an injection driving mechanism and an automatic injection device, wherein the automatic injection device using the injection driving mechanism has a simple structure and is easy to operate.
The injection driving mechanism is used for an automatic injection device and comprises a protective sleeve and a shell, the injection driving mechanism comprises a guide tube, a push rod and a release sleeve, wherein an elastic arm of the guide tube is matched with a clamping part of the push rod to form a limiting assembly, the release sleeve is provided with a release port, one end, extending into the shell, of the protective sleeve is contacted with the release sleeve, and when the injection driving mechanism is not released, the elastic arm is abutted against the clamping part to position the push rod; the protection sleeve moves axially to drive the release sleeve to move axially, when the release port reaches the position of the elastic arm, the elastic arm springs outwards and is separated from the clamping part, the guide tube releases the limit of the push rod, the push rod moves from the far end to the near end, the injection driving mechanism releases, and the near end is the end close to the person receiving the injection.
As an alternative of the injection driving mechanism, the engaging portion includes an engaging ring and an engaging block, the engaging ring is disposed on the periphery of the push rod, the engaging ring and the engaging block are disposed at intervals along the axial direction of the push rod, and the elastic arm is engaged between the engaging ring and the engaging block.
As an alternative of the injection driving mechanism, the inner wall of the guide tube is provided with a first sliding groove, and the engaging block moves along the first sliding groove to limit the rotation of the push rod.
As an alternative to the injection drive mechanism, the plunger comprises a central bore having one end open, the central bore having a second energy accumulating element disposed therein; one end of the guide pipe is provided with an end face, one end of the second energy storage element is abutted to the end face of the guide pipe, and the other end of the second energy storage element is abutted to the bottom of the central hole.
As an alternative to the injection driving mechanism, the injection driving mechanism further includes a bottom cover, a guide rod is disposed at the center of the bottom cover, the bottom cover is fixedly connected to the guide tube, the guide rod can enter the central hole, and the second energy storage element is sleeved on the guide rod.
As an alternative of the injection driving mechanism, one end of the guide tube, which has an end face, is provided with a first fixing ring, and the bottom cover is provided with a clamping hook, and the clamping hook is clamped with the first fixing ring so as to fix the bottom cover and the guide tube.
As an alternative to the injection drive mechanism, one end of the release sleeve is provided with a second fixing ring, the outer circumference of the release sleeve is provided with a third energy accumulating element, one end of the third energy accumulating element abuts against the first fixing ring, and the other end abuts against the second fixing ring.
As an alternative of the injection driving mechanism, a stop member is arranged at one end of the guide tube, which is far away from the end surface, a limit groove is arranged on the release sleeve, the limit groove is arranged between the release port and the second fixing ring, and the stop member abuts against one end of the limit groove to limit a first limit position of the release sleeve; the stop piece is abutted against the other end of the limiting groove to limit the second limit position of the release sleeve.
As an alternative of the injection driving mechanism, the injection driving mechanism further comprises a limiting ring, the limiting ring is disposed at one end of the guide tube far away from the end surface, and the limiting ring is used for limiting the limit position of the push rod.
As an alternative of the injection driving mechanism, a third fixing hole is formed in the guide tube, and a limiting hook is arranged on the limiting ring and is matched with the third fixing hole to fix the limiting ring on the guide tube.
As an alternative to the injection drive mechanism, the stop collar comprises a stop arm, and the push rod moves from the distal end to the proximal end, causing the snap ring to move into abutment with a side of the stop arm remote from the proximal end, so as to limit the limit position of the push rod.
As an alternative of the injection driving mechanism, the limiting hook is arranged on the limiting arm and runs through the limiting arm, a second sliding groove is formed in the inner side of the limiting arm, the second sliding groove is formed in the position, far away from the limiting arm, of one end of the near end of the limiting arm extends to the limiting hook, two clamping blocks are arranged between the two clamping blocks, a pressing block is arranged between the two clamping blocks, the push rod moves to drive the pressing block to move to the position, abutted against the limiting hook, so that the push rod moves at a high speed to enable the limiting hook to be punched out from the third fixing hole.
As an alternative of the injection driving mechanism, the inner wall of the release sleeve is provided with a first limit groove, the outer periphery of the guide tube is provided with a first limit projection, and the first limit projection is matched with the first limit groove to limit the relative rotation of the release sleeve and the guide tube.
An automatic injection device, wherein, including casing, injection mechanism and as above any scheme the injection actuating mechanism, injection mechanism and the injection actuating mechanism all locate in the casing, the injection mechanism is installed in the injection actuating mechanism is close to the one end of near-end.
As an alternative to the automatic injection device, one end of the release sleeve near the proximal end is provided with a second limiting protrusion, and the inner wall of the housing is provided with a second limiting groove, and the second limiting protrusion is matched with the second limiting groove to limit the release sleeve from rotating.
It is still another object of the present invention to provide an automatic injection device, which employs the above mentioned audible feedback mechanism and the above mentioned injection driving mechanism, so as to facilitate the recipient to complete the injection independently and control the injection process.
An autoinjector comprising an audible feedback mechanism as described above and an injection drive mechanism as described above.
The invention has the beneficial effects that:
the invention provides a sounding feedback mechanism which is applied to an automatic injection device, wherein the automatic injection device comprises a guide pipe, the sounding feedback mechanism comprises a sounding ring, a first energy storage element in an energy storage state and a sounding feedback assembly, and the first energy storage element in the energy storage state provides kinetic energy for the sounding ring. The sounding feedback assembly comprises a guide surface and a termination surface, after the sounding ring is gradually separated from the mounting surface in an abutting mode, the sounding ring rotates under the action of the first energy storage element in an energy storage state and falls on the first abutting surface of the guide surface with the mounting surface in a height difference mode, the sounding ring and the first abutting surface are impacted to make a 'clicking' sound, namely, an initial prompt sound is given, and the start of injection of an injector is prompted. Along with the sound production ring removes to the inclined plane, the inclined plane makes the sound production ring rotate, drives the first energy storage component that is in the energy storage state and continues the energy storage, and when the sound production ring arrived the second butt face, the energy storage of first energy storage component was ended, and the second butt face can prevent that the sound production ring from rotating. The push rod continues to drive the sounding ring to move, when the sounding ring is separated from the butt with the second butt surface, the rotation of the sounding ring is not limited, the first energy storage element in the energy storage state releases the stored torsion force to drive the sounding ring to rotate, meanwhile, the sounding ring falls on the stop surface with the second butt surface, the sounding ring and the stop surface are impacted to make a 'click' sound, namely, the stop prompt sound is given out, and the prompt of accepting the injection of an injector is about to end. According to the sounding feedback mechanism provided by the invention, the first energy storage element in the energy storage state provides kinetic energy for the sounding ring to rotate, so that when the sounding ring moves from the far end to the near end, the first energy storage element in the energy storage state stores energy to drive the sounding ring to rotate, and the sounding ring collides with the first abutting surface to generate an initial prompt sound when injection starts; when the injection is about to end, the sounding ring collides with the end surface to generate an end prompt sound; effectively preventing the injure caused by the misjudgment of the injection process of the injector in the injection process. And this injection actuating mechanism need not to use electronic component, has reduced the influence of external environment to the feedback sound of vocal feedback mechanism, when improving the reliability and the stability of vocal feedback mechanism, the cost is reduced.
A plurality of guide surfaces can be arranged from the far end to the near end along the tube wall of the guide tube, and along with the release of the push rod, the user can hear the prompt tone at intervals in the process that the push rod moves from the far end to the near end, and when the prompt tone cannot be heard, the user indicates that the injection is finished. The arrangement of the guide surfaces can enable the automatic injection device to continuously sound in the injection process, and the prompting effect on people with insensitive annual reaction and people who receive injections with impaired hearing is more remarkable. The continuous sounding can continuously remind the injector of the injection process, and even if the impact sound of the second click is missed, the continuous sound can still be heard in the subsequent injection process until the impact sound of the last click is over and the impact sound is not heard any more, so that the injection is finished, and the injector is prevented from mistakenly judging the injection process to cause injury in the injection process.
The automatic injection device applying the sounding feedback mechanism can give out obvious starting prompt tone and stopping prompt tone in the injection process, so that the injector can accurately master the injection process, and the prompting effect on insensitive annual reactions and hearing-impaired injectors is more obvious; the influence of the external environment on the feedback sound of the sound production feedback mechanism is reduced, the reliability and the stability of the sound production feedback mechanism are improved, and meanwhile, the cost is reduced.
According to the injection driving mechanism provided by the invention, a force from the near end to the far end is applied to the release sleeve on the injection driving mechanism, the elastic arm of the guide tube is matched with the clamping part of the push rod to form a limiting component, when the protective sleeve is stressed to move axially to drive the release sleeve to move to the release port of the release sleeve, the outer elasticity of the elastic arm is separated from the clamping part, so that the guide tube relieves the limitation on the axial movement of the push rod, the push rod moves from the far end to the near end to drive the piston of the automatic injection device to move, and the pushing of liquid medicine is completed. The injection driving mechanism is simple in structure and convenient and fast to operate.
The invention provides an automatic injection device which comprises a shell, an injection mechanism and the injection driving mechanism, wherein the injection driving mechanism and the injection mechanism are both arranged in the shell, the injection mechanism is arranged at one end of the injection driving mechanism close to the near end, and the injection driving mechanism is used for driving the injection mechanism to push liquid medicine. The automatic injection device is simple in structure and easy to operate, and an injector is convenient to operate.
Drawings
FIG. 1 is a longitudinal cross-sectional view of an automatic injection device provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of an injection drive mechanism according to one embodiment of the present invention;
FIG. 3 is an exploded view of an injection drive mechanism provided in accordance with one embodiment of the present invention;
FIG. 4 is a longitudinal cross section of an injection drive mechanism provided in accordance with an embodiment of the present invention in an initial state;
FIG. 5 is a longitudinal cross-sectional view of an injection drive mechanism according to a first embodiment of the present invention in a released state;
FIG. 6 is a schematic structural view of a release sleeve according to an embodiment of the present invention;
FIG. 7 is a first schematic structural diagram of a guide tube according to a first embodiment of the present invention;
FIG. 8 isbase:Sub>A sectional view taken along line A-A of FIG. 7;
FIG. 9 is a first schematic structural diagram of a push rod according to a first embodiment of the present invention;
FIG. 10 is a second schematic structural view of a push rod according to the first embodiment of the present invention;
FIG. 11 is a second schematic structural view of a guide tube according to a first embodiment of the present invention;
FIG. 12 is a schematic view of a bottom cover according to an embodiment of the present invention;
FIG. 13 is a schematic view of a stop collar according to an embodiment of the present invention;
fig. 14 is an assembly view of the sounding ring, the first energy storage element in an energy storage state and the push rod according to the second embodiment of the present invention;
fig. 15 is a schematic structural diagram of a sounding ring according to a second embodiment of the present invention;
FIG. 16 is a third schematic structural view of a guide tube according to a second embodiment of the present invention;
FIG. 17 is a sectional view taken along line B-B of FIG. 16;
FIG. 18 is a force diagram of a plunger of an automatic injection device during an injection procedure in accordance with a second embodiment of the present invention;
FIG. 19 is a force diagram of the sound ring of the automatic injection device of the second embodiment of the present invention during an injection process;
FIG. 20 is a cross-sectional view of an automatic injection device for generating an initial alert tone provided in accordance with a second embodiment of the present invention;
fig. 21 is a cross-sectional view of an automatic injection device for generating an end tone according to a second embodiment of the present invention.
In the figure:
100. a housing; 101. a housing; 102. a protective sleeve;
200. an injection mechanism; 201. a needle cylinder; 202. a piston; 203. a needle head protective cap;
1. a guide tube; 11. a mounting surface; 12. a guide surface; 121. a first abutting surface; 122. an inclined surface; 123. a second abutting surface; 13. a terminating surface; 14. a resilient arm; 141. clamping convex; 142. a bevel; 15. a first chute; 151. a first limit bar; 152. a second limit strip; 16. a first retaining ring; 161. a card slot; 17. a stopper; 18. a first limit projection; 19. a third fixing hole;
2. a push rod; 21. a first limiting part; 22. a second limiting part; 221. a second fixing hole; 23. clamping a ring; 24. a clamping block; 25. a central bore; 26. briquetting;
3. releasing the sleeve; 31. a release port; 32. a second retaining ring; 321. a second limit bulge; 33. a limiting groove; 34. a first limit groove;
4. a sound producing ring; 41. a bump; 411. a sound production feedback surface; 412. a first fixing hole;
5. a first energy storage element;
6. a second energy storage element;
7. a bottom cover; 71. a guide bar; 72. a hook is clamped;
8. a third energy storage element;
9. a limiting ring; 91. a limiting clamping hook; 92. a second runner.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides an automatic injection device, which includes a housing 100, an injection mechanism 200 and an injection driving mechanism, wherein the injection mechanism 200 and the injection driving mechanism are both disposed in the housing 100, and the injection mechanism 200 is mounted at one end of the injection driving mechanism near the proximal end. The proximal end is the end near the recipient of the injection. The injection mechanism 200 and the injection driving mechanism are coaxially nested together, and the injection driving mechanism 200 is driven to inject the liquid medicine.
The housing 100 comprises a casing 101 and a protective sleeve 102, the casing 101 being fixedly connected to the injection drive mechanism, the protective sleeve 102 being arranged at one end of the casing 101 and sliding with respect to the casing 101. The injection mechanism 200 comprises a piston 202, a needle cylinder 201, a needle head protection cap 203 and liquid medicine, the piston 202 is arranged between the injection driving mechanism and the needle cylinder 201, the needle head protection cap 203 is arranged at one end of the needle cylinder 201 far away from the piston 202, and the liquid medicine is arranged in the needle cylinder 201; the needle can pass through the protective sleeve 102 to contact the skin of the person receiving the injection.
When the automatic injection device is used, the protection sleeve 102 is pressed on the skin surface of a person receiving an injection, the protection sleeve 102 is pressed downwards with force, the shell 101 moves from the far end to the near end, the protection sleeve 102 moves from the near end to the far end relative to the shell 101, and an injection needle gradually extends out of the protection sleeve 102 to penetrate the skin; meanwhile, the end of the protection sleeve 102 far from the proximal end acts on an injection driving mechanism, and the injection driving mechanism is stressed to drive the piston 202 to move from the distal end to the proximal end so as to push the liquid medicine to enter the body of the person receiving the injection through the injection needle, thereby completing automatic injection.
The automatic injection device provided by the embodiment comprises a shell, an injection mechanism and the injection driving mechanism, wherein the injection driving mechanism and the injection mechanism are both arranged in the shell, the injection mechanism is arranged at one end, close to the near end, of the injection driving mechanism, and the injection driving mechanism is used for driving the injection mechanism to push liquid medicine. The automatic injection device is simple in structure and easy to operate, and an injector is convenient to operate.
As shown in fig. 2-13, the present embodiment provides an injection driving mechanism for the automatic injection device, the injection driving mechanism includes a guiding tube 1, a pushing rod 2 and a releasing sleeve 3, the pushing rod 2 is disposed in the guiding tube 1, the guiding tube 1 is nested in the releasing sleeve 3, the releasing sleeve 3 is forced to move from the proximal end to the distal end, and the guiding tube 1 can release the limitation of the pushing rod 2 on the axial movement, so that the pushing rod 2 can move from the distal end to the proximal end.
Specifically, the elastic arm 14 of the guide tube 1 cooperates with the engaging portion of the push rod 2 to form a limiting assembly, the release sleeve 3 is provided with a release port 31, one end of the protective sleeve 102 extending into the housing 101 contacts with the release sleeve 3, and when the injection driving mechanism is not released, the elastic arm 14 abuts against the engaging portion to position the push rod 2; the protection sleeve 102 moves axially to drive the release sleeve 3 to move axially, when the release port 31 reaches the position of the elastic arm 14, the elastic arm 14 springs outwards and is separated from the clamping part, the guide tube 1 releases the limit on the push rod 2, the push rod 2 moves from the far end to the near end, and the injection driving mechanism releases.
According to the injection driving mechanism provided by the embodiment, a force from the near end to the far end is applied to the release sleeve 3 on the injection driving mechanism, the elastic arm 14 of the guide tube 1 is matched with the clamping part of the push rod 2 to form a limiting component, when the protection sleeve 102 is stressed to move axially to drive the release sleeve 3 to move until the elastic arm 14 is located at the release port 31 of the release sleeve 3, the elastic arm 14 springs outwards to separate from the clamping part, so that the guide tube 1 relieves the limitation on the axial movement of the push rod 2, and the push rod 2 moves from the far end to the near end to drive the piston 202 of the automatic injection device to move, thereby completing the pushing of the liquid medicine. The injection driving mechanism is simple in structure and convenient and fast to operate.
The tube wall of the guide tube 1 is provided with an elastic arm 14, the elastic arm 14 penetrates through the inner wall and the outer wall of the guide tube 1, the clamping part comprises a clamping ring 23 and a clamping block 24, the clamping ring 23 is arranged on the periphery of the push rod 2, and the clamping ring 23 and the clamping block 24 are arranged at intervals along the axial direction of the push rod 2. The elastic arm 14 is clamped between the clamping ring 23 and the clamping block 24 to limit the push rod 2 to move axially; the elastic arm 14 can be ejected through the release port 31 to release the guide tube 1 from the axial movement restriction of the push rod 2. In the initial state, the elastic arms 14 are compressed by the cylindrical wall of the release sleeve 3, and engaged between the engaging ring 23 and the engaging block 24, and when the release sleeve 3 is forced to move from the proximal end to the distal end and moves until the release opening 31 is located above the elastic arms 14, the elastic arms 14 are released through the release opening 31, so that the guide tube 1 releases the restriction on the axial movement of the push rod 2.
The free end of the elastic arm 14 is provided with a locking projection 141 facing the push rod 2, the free end of the elastic arm 14 is located at one end of the elastic arm 14 close to the far end, the locking projection 141 is locked between the locking ring 23 and the locking block 24, in order to facilitate the elastic arm 14 to be located below the release opening 31, the locking projection 141 is popped out from between the locking ring 23 and the locking block 24, an inverted trapezoid structure is formed between the locking ring 23 and the locking block 24, the locking projection 141 is matched with the inverted trapezoid structure, and the inverted trapezoid structure is large in top and small in bottom, so that the locking projection 141 is popped out.
The inclined surface 142 is disposed at one end of the locking protrusion 141 close to the distal end, and the inclined surface 142 is inclined upward from the distal end to the proximal end, so that when the release sleeve 3 is reset, the elastic arm 14 can enter the release sleeve 3 again, and is compressed by the inner wall of the release sleeve 3 to be locked between the locking ring 23 and the locking block 24.
The number of the elastic arms 14 and the number of the engaging blocks 24 are two, the engaging ring 23 is provided with two engaging blocks, two engaging portions are formed between the two engaging blocks and the two engaging blocks 24, and the two engaging portions are symmetrically arranged and respectively matched with the two engaging protrusions 141 to ensure the balance of the stress of the push rod 2.
Optionally, the inner wall of the guide tube 1 is provided with a first sliding slot 15, and the engaging block 24 moves along the first sliding slot 15 to limit the rotation of the push rod 2. In this embodiment, the fixture block and the engaging block 24 both move along the first sliding slot 15, the number of the first sliding slots 15 is two, and the two first sliding slots 15 and the two engaging blocks 24 are correspondingly matched one to one, so that the push rod 2 can only move along the axial direction during the operation of the injection driving mechanism.
The inner wall interval of stand pipe 1 is provided with first spacing strip 151 and second spacing strip 152, forms first spout 15 between first spacing strip 151 and the second spacing strip 152.
The push rod 2 comprises a central hole 25 with one open end, and a second energy storage element 6 is arranged in the central hole 25; one end of the guide tube 1 has an end face, one end of the second energy accumulating element 6 abuts against the end face of the guide tube 1, and the other end abuts against the bottom of the central hole 25.
The second energy storage element 6 is a spring, and in an initial state, the second energy storage element 6 is in a compressed state, and when the elastic arm 14 releases the limitation on the axial movement of the push rod 2, the push rod 2 moves from the distal end to the proximal end under the action of the elastic restoring force of the second energy storage element 6.
Due to the long length of the second energy storage element 6, the thrust of the tappet 2 is prevented from deviating due to the twisting of the second energy storage element 6 under the action of external forces. As shown in fig. 4, fig. 5 and fig. 12, the injection driving mechanism further includes a bottom cover 7, a guide rod 71 is disposed at the center of the bottom cover 7, the bottom cover 7 is fixedly connected to the guide tube 1, the guide rod 71 can enter the central hole 25, and the second energy storage element 6 is sleeved on the guide rod 71. The second energy storage element 6 is guided by the guide rod 71, so that the second energy storage element 6 is prevented from twisting.
In this embodiment, the guide rod 71 needs to enter the central hole 25 through the end of the guide tube 1 having the end face, in order to enable the guide rod 71 to enter the central hole 25, an avoiding hole is provided on the end face of the guide tube 1, and the guide rod 71 passes through the avoiding hole to enter the central hole 25.
Because automatic injection device is disposable, in order to reduce cost, stand pipe 1, push rod 2, release sleeve 3 and sound ring 4 are the plastics material, and guide bar 71 is the rod iron, and the setting of rod iron can avoid injection actuating mechanism to release sleeve 3 atress at the in-process of drive piston 202 and just cause guide bar 71 skew to arouse that push rod 2 thrust just leads to the syringe needle to be crooked, causes the injury to the person of receiving the injection. The steel bar is injection molded in the center of the bottom cover 7.
One end of the guide tube 1 with the end face is provided with a first fixing ring 16, the bottom cover 7 is provided with a clamping hook 72, and the clamping hook 72 is clamped with the first fixing ring 16 so as to fix the bottom cover 7 and the guide tube 1. The bottom cover 7 and the guide tube 1 are fixed in a clamping manner, and of course, in other embodiments, the fixing manner of the bottom cover 7 and the guide tube 1 is not limited to clamping, and other manners such as inserting or screwing can be used.
Two clamping hooks 72 are oppositely arranged on the bottom cover 7, a clamping groove 161 is arranged between the first fixing ring 16 and the outer wall of the guide tube 1, and the two clamping hooks 72 extend into the clamping groove 161 to be hooked at one end, far away from the bottom cover 7, of the first fixing ring 16, so that the clamping hooks 72 are located inside the first fixing ring 16 and are not prone to being mistakenly detached to influence the use of the injection driving mechanism.
Of course, in other embodiments, the locking slot 161 may also be disposed on the outer periphery of the first fixing ring 16, and the two locking hooks 72 are locked with the first fixing ring 16 from the outer side of the first fixing ring 16.
In addition, the outer surface of the bottom cover 7 is arranged to be an arc-shaped surface, and the outer diameter of the arc-shaped surface is larger than the maximum outer diameter of the release sleeve 3 and the guide tube 1 so as to be matched with the shell 101 of the automatic injection device, so that the attractiveness of the automatic injection device is improved due to the arrangement of the arc-shaped surface; and simultaneously plays a role in protection.
One end of the release sleeve 3 is provided with a second fixing ring 32, the periphery of the release sleeve 3 is provided with a third energy storage element 8, one end of the third energy storage element 8 is abutted to the first fixing ring 16, and the other end is abutted to the second fixing ring 32. The third energy storage element 8 is a spring, and the third energy storage element 8 is sleeved on the periphery of the release sleeve 3, so that the release sleeve 3 is convenient to reset when not stressed.
As an alternative to the automatic injection device, the end of the release sleeve 3 near the proximal end is provided with a second stop protrusion 321, the inner wall of the housing 100 is provided with a second stop groove, and the second stop protrusion 321 cooperates with the second stop groove to limit the rotation of the release sleeve 3. The second limit projection 321 and the second limit groove cooperate to limit the release sleeve 3 from moving only in the axial direction of the push rod 2 when the release sleeve is pushed by the protection sleeve 102.
The second limiting protrusion 321 is disposed on the periphery of the second fixing ring 32, and the second limiting groove is disposed on the inner wall of the housing 101. The two second limiting protrusions 321 are oppositely arranged, correspondingly, the two second limiting grooves are oppositely arranged, and the two second limiting protrusions 321 and the two second limiting grooves are matched in a one-to-one correspondence mode to guarantee stress balance of the release sleeve 3.
With continued reference to fig. 4 to 7, a stop member 17 is disposed at an end of the guide tube 1 away from the end surface, a limiting groove 33 is disposed on the release sleeve 3, the limiting groove 33 is disposed between the release opening 31 and the second fixing ring 32, and the stop member 17 abuts against an end of the limiting groove 33 to limit a first limit position of the release sleeve 3; the stopper 17 abuts against the other end of the stopper groove 33 to restrict the second limit position of the release sleeve 3. In the initial state, the side of the stopper 17 near the distal end abuts against the side wall of the limiting groove 33 far from the proximal end, and the release sleeve 3 is located at the first limit position. In the release state, the side of the stopper 17 close to the proximal end abuts against the side wall of the limit groove 33 close to the proximal end, and the release sleeve 3 is located at the second limit position. The limiting groove 33 is matched with the stop piece 17, so that the release sleeve 3 can be prevented from being separated from the guide pipe 1 when the release sleeve is stressed to move axially.
Stop part 17 and spacing groove 33 all are provided with two, and two relative guide tube 1's of stop part 17 central line symmetry sets up, and the relative release sleeve 3's of spacing groove 33 central line symmetry sets up, and two stop parts 17 and two spacing grooves 33 one-to-one cooperation to guarantee release sleeve 3 atress equilibrium.
With continued reference to fig. 6 and 11, the inner wall of the release sleeve 3 is provided with a first limit groove 34, the outer periphery of the guide tube 1 is provided with a first limit projection 18, and the first limit projection 18 cooperates with the first limit groove 34 to limit the relative rotation of the release sleeve 3 and the guide tube 1. In order to prevent the release sleeve 3 and the guide tube 1 from being forced to rotate relatively, the first limit projection 18 and the first limit groove 34 are matched to limit the relative rotation of the two. The two first limiting grooves 34 are symmetrically arranged relative to the center line of the release sleeve 3, and the lengths of the two first limiting grooves 34 are the same as that of the release sleeve 3. Correspondingly, the number of the first limiting bulges 18 is also two, and the two first limiting bulges 18 are correspondingly matched with the two first limiting grooves 34 one by one so as to ensure the stress balance of the guide pipe 1.
As shown in fig. 13, the injection driving mechanism further includes a limiting ring 9, the limiting ring 9 is disposed at one end of the guide tube 1 far from the end surface, and the limiting ring 9 is used for limiting the limit position of the push rod 2. The limiting ring 9 is arranged at one end of the guide tube 1 close to the near end and is used for limiting the limit position of the push rod 2 when the push rod 2 is stressed to move from the far end to the near end, and when the push rod 2 moves to the limit position, the liquid medicine in the needle cylinder 201 is just extruded completely.
Be provided with third fixed orifices 19 on the stand pipe 1, be provided with spacing trip 91 on the spacing ring 9, spacing trip 91 is in order to be fixed in stand pipe 1 with spacing ring 9 with the cooperation of third fixed orifices 19. The guide tube 1 is fixed with the limit ring 9 through the matching of the limit clamping hook 91 and the third fixing hole 19. Of course, the limit ring 9 may be fixed to the guide tube 1 by other means such as insertion or screw connection.
The spacing ring 9 comprises a spacing arm, the push rod 2 moves from a far end to a near end, and the clamping ring 23 is driven to move to one side far away from the near end of the spacing arm to abut against the side far away from the near end, so that the limiting position of the push rod 2 is limited.
The two limiting arms are oppositely arranged and comprise a first side wall and a second side wall, when the push rod 2 moves, one clamping block 24 moves between the first side wall of one limiting arm and the second side wall of the other limiting arm, and the other clamping block 24 moves between the second side wall of one limiting arm and the first side wall of the other limiting arm until the clamping rings 23 are abutted to one side, far away from the near end, of the limiting arm.
Optionally, the limiting hook 91 is disposed on the limiting arm and penetrates through the limiting arm, a second sliding groove 92 is disposed on the inner side of the limiting arm, the second sliding groove 92 extends from one end of the limiting arm, which is far away from the near end, to the limiting hook 91, a pressing block 26 is disposed between the two clamping blocks 24, the push rod 2 moves to drive the pressing block 26 to move along the second sliding groove 92 to abut against the limiting hook 91, so that the limiting hook 91 is prevented from being punched out of the third fixing hole 19 due to high-speed movement of the push rod 2.
In this embodiment, two limiting hooks 91 are oppositely arranged on the peripheral wall of the limiting ring 9, and two third fixing holes 19 are arranged on the guide tube 1. Correspondingly, two second chutes 92 and two pressing blocks 26 are also provided. So as to ensure the stability of the fixing of the limit ring 9 and the balance of the stress of the push rod 2.
The working principle of the injection driving mechanism provided by the embodiment is as follows:
when the automatic injection device is used, the protection sleeve 102 is pressed on the skin surface of a person receiving an injection, the protection sleeve 102 is pressed downwards with force, the shell 101 moves from the far end to the near end, the protection sleeve 102 moves from the near end to the far end relative to the shell 101, and an injection needle gradually extends out of the protection sleeve 102 to penetrate the skin; meanwhile, the release sleeve 3 is driven by the protective sleeve 102 to move from the proximal end to the distal end, when the release opening 31 on the release sleeve 3 reaches the upper part of the elastic arm 14 on the guide tube 1, the release sleeve 3 loses the circumferential limitation on the elastic arm 14, the elastic arm 14 springs outwards, namely, the clamping protrusion 141 on the elastic arm 14 springs out from between the clamping block and the clamping block 24, at this time, the push rod 2 loses the limitation of circumferential rotation, the second energy storage element 6 resets and releases energy to drive the push rod 2 to move from the distal end to the proximal end, the push rod 2 acts on the piston 202 to press the liquid medicine in the syringe 201 to enter the body of a person receiving injection through the injection needle, and automatic injection is completed.
The second embodiment:
the present embodiment provides an automatic injection device, which includes an injection driving mechanism and a sound feedback mechanism, where the injection driving mechanism may be the injection driving mechanism provided in the first embodiment, or may be an injection driving mechanism of another structure.
As shown in fig. 14-17, this embodiment further provides a sound feedback mechanism, which is used for the automatic injection device described above, the automatic injection device includes a guide tube 1 and a push rod 2, the sound feedback mechanism includes a sound ring 4, a first energy storage element 5 in an energy storage state and a sound feedback component, the sound ring 4 and the first energy storage element 5 in the energy storage state are sleeved outside the push rod 2, one end of the first energy storage element 5 in the energy storage state is fixed to the sound ring 4, the other end of the first energy storage element is fixed to the push rod 2, and the first energy storage element 5 in the energy storage state provides kinetic energy for the sound ring 4 to rotate around the axis of the push rod 2.
The inner wall of the guide tube 1 is provided with an installation surface 11, and the sounding ring 4 is abutted against the installation surface 11. When the push rod 2 moves to drive the sounding ring 4 to move, the sounding ring 4 is gradually separated from the mounting surface 11 to be abutted, and the sounding ring 4 rotates under the action of the torsion force of the first energy storage element 5 in the energy storage state. The sounding feedback assembly comprises a guide surface 12 and a terminating surface 13 which are arranged on the pipe wall of the guide pipe 1, the mounting surface 11, the guide surface 12 and the terminating surface 13 are sequentially arranged along the direction from the far end to the near end, one ends of the mounting surface 11 and the guide surface 12, which are close to the mounting surface 11, and one ends of the guide surface 12, which are close to the terminating surface 13, and the terminating surface 13 have a certain height difference in the circumferential direction of the guide pipe 1, the guide surface 12 comprises a first abutting surface 121, a second abutting surface 123 and an inclined surface 122 used for connecting the first abutting surface 121 and the second abutting surface 123, the sounding ring 4 generates a starting prompt sound when moving from the mounting surface 11 to the first abutting surface 121 in the moving process, the sounding ring 4 moves on the inclined surface 122 to drive the sounding ring 4 to rotate so that the first energy storage element 5 in the energy storage state continues to store energy, and the sounding ring 4 generates a terminating prompt sound when moving from the second abutting surface 123 to the terminating surface 13.
By applying a force from the proximal end to the distal end to the release sleeve 3 on the injection driving mechanism, the guide tube 1 releases the restriction on the axial movement of the push rod 2, and the push rod 2 moves from the distal end to the proximal end to drive the piston 202 of the automatic injection device to move, thereby completing the pushing of the liquid medicine. In the initial state, the sounding ring 4 abuts against the mounting surface 11 on the inner wall of the guide tube 1. In the process that the push rod 2 drives the sounding ring 4 and the first energy storage element 5 in the energy storage state to move from the far end to the near end, after the sounding ring 4 is gradually separated from the mounting surface 11 in a butting manner, the sounding ring 4 rotates under the action of the torsional force of the first energy storage element 5 in the energy storage state and falls on the first butting surface 121 of the guide surface 12 with the mounting surface 11 having a height difference, and the sounding ring 4 and the first butting surface 121 collide to make a clicking sound, namely, an initial prompt sound, so as to prompt a recipient to start injection. Along with the sounding ring 4 moves to the inclined surface 122, the inclined surface 122 enables the sounding ring 4 to rotate, and drives the first energy storage element 5 to continue to store energy, when the sounding ring 4 reaches the second abutting surface 123, the energy storage of the first energy storage element 5 is finished, and the second abutting surface 123 can prevent the sounding ring 4 from rotating. The push rod 2 continues to drive the sounding ring 4 to move, when the sounding ring 4 is separated from the abutting with the second abutting surface 123, the rotation of the sounding ring 4 is not limited, the first energy storage element 5 in the energy storage state releases the stored torsion force to drive the sounding ring 4 to rotate, meanwhile, the sounding ring 4 falls on the terminating surface 13 with the height difference with the second abutting surface 123, the sounding ring 4 collides with the terminating surface 13 to make a 'clicking' sound, namely, a stop prompt sound is given, and the injection of the injector is prompted to be completed. According to the automatic injection driving device provided by the embodiment, the installation surface 11, the guide surface 12 and the termination surface 13 are arranged on the tube wall of the guide tube 1, the first energy storage element 5 in the energy storage state provides kinetic energy for the sound production ring 4 to rotate around the axis of the push rod 2, so that when the sound production ring 4 moves from the far end to the near end along with the push rod 2, the first energy storage element 5 in the energy storage state drives the sound production ring 4 to rotate, and when the injection starts, the sound production ring collides with the first abutting surface 121 to produce an initial prompt sound; an end-stop warning sound is generated by the collision with the end surface 13 when the injection is about to end; effectively preventing the injure caused by the misjudgment of the injection process of the injector in the injection process. And this automatic injection drive arrangement need not to use electronic component, has reduced the influence of external environment to the feedback sound of vocal feedback mechanism, when improving the reliability and the stability of vocal feedback mechanism, the cost is reduced.
The sounding ring 4 rotates between two first chutes 15 in the guide tube 1, the guide surface 12 and the termination surface 13 are arranged between the two first chutes 15, the first limiting strip 151 penetrates through the guide tube 1 in the axial direction, and the second limiting strip 152 extends from one end of the guide tube 1 close to the near end to a position close to the mounting surface 11 to stop.
In the present embodiment, the protrusion 41 of the sounding ring 4 includes the sounding feedback surface 411, and the first position limiting bar 151 is longer than the second position limiting bar 152. When the automatic injection device is assembled, the push rod 2, the sounding ring 4 and the first energy storage element 5 in the energy storage state are fed along the first sliding groove 15, the first sliding groove 15 limits the feeding path of the push rod 2 and the sounding ring 4, and as the first energy storage element 5 in the energy storage state has a tendency of releasing the torsional force to return to the original position, the bump 41 of the sounding ring 4 is driven by the torsional force so that the sounding feedback surface 411 abuts against the second limit strip 152 and is fed against the inner side of the second limit strip 152; meanwhile, the engaging block 24 and the engaging block of the push rod 2 are driven by the torsion force of the first energy storage element 5 in the energy storage state, so that the engaging block 24 and the engaging block abut against the first limiting strip 151 and feed against the inner side of the first limiting strip 151. When the sounding ring 4 is fed to the farthest position of the second limiting bar 152, the bump 41 of the sounding ring 4 loses the limitation in the circumferential direction, the first energy storage element 5 in the energy storage state partially releases the stored torsion force, and the bump 41 of the sounding ring 4 is separated from the second limiting bar 152, so that the sounding feedback surface 411 can abut against the mounting surface 11, and at this time, the automatic injection device is assembled. The first limiting strip and the second limiting strip are also arranged to be two.
Of course, the lengths of the first limiting strip 151 and the second limiting strip 152 are not limited to the above, the length of the first limiting strip 151 may also be smaller than the length of the second limiting strip 152, and when the length of the first limiting strip 151 is smaller than the length of the second limiting strip 152, the rotation direction of the sounding ring 4 will change accordingly, and this is not limited specifically here.
The sound feedback mechanism provided by the present embodiment can adjust the sound level of the initial prompt sound by adjusting the height difference between the mounting surface 11 and the first abutting surface 121, preferably, the mounting surface 11 is disposed close to the second limiting strip 152 of one of the first sliding grooves 15, and the maximum limit position of the first abutting surface 121 is the first limiting strip 151 of the other first sliding groove 15.
The audible feedback mechanism provided by the present embodiment can adjust the sound level of the termination prompt sound by adjusting the height difference between the second abutting surface 123 and the termination surface 13, and preferably, the second abutting surface 123 is disposed near the second limit strip 152 of one of the first sliding grooves 15, and the maximum limit position of the termination surface 13 is the first limit strip 151 of the other first sliding groove 15.
As shown in fig. 15 and 17, the outer surface of the sounding ring 4 is provided with a protrusion 41, the protrusion 41 includes a sounding feedback surface 411, the sounding feedback surface 411 is a side surface of the protrusion 41 connected with the outer wall of the sounding ring 4, and the sounding feedback surface 411 can abut against the mounting surface 11 and can be sequentially matched with the guide surface 12 and the termination surface 13. In the initial state of the injection drive mechanism, the acoustic feedback surface 411 abuts against the mounting surface 11. Along with the push rod 2 drives the sounding ring 4 and the first energy storage element 5 in the energy storage state to move from the far end to the near end, the sounding feedback surface 411 is separated from the abutting joint with the mounting surface 11, under the action of the torsional force of the first energy storage element 5 in the energy storage state, the sounding ring 4 rotates to the first abutting joint surface 121 of the guide surface 12 with the height difference with the mounting surface 11, and the sounding feedback surface 411 collides with the first abutting joint surface 121 to generate an initial prompt sound. The energy of the first energy storage element 5 in the energy storage state is partially released, the sounding ring 4 is driven by the push rod 2 to move along the inclined surface 122, the inclined surface 122 enables the sounding ring 4 to rotate, the first energy storage element 5 is enabled to generate torsion energy storage again, and the sounding ring 4 does not rotate until the energy storage of the second abutting surface 123 is completed. The sounding ring 4 continues to move along with the push rod 2, when the sounding ring is completely separated from the second abutting surface 123, the rotation of the sounding ring 4 is not limited, the energy of the first energy storage element 5 in the energy storage state is released again, the sounding ring 4 is driven to rotate to the terminating surface 13 with a height difference with the second abutting surface 123, and the sounding feedback surface 411 collides with the terminating surface 13 to generate a termination prompt sound.
In order to facilitate the processing of the guide surface 12 and the terminating surface 13, when the guide surface 12 and the terminating surface 13 are processed, a groove is formed in the guide tube 1 so as to form the guide surface 12 connecting the first abutting surface 121 and the second abutting surface 123 by the inclined surface 122 and the terminating surface 13 having a height difference from the guide surface 12.
In the present embodiment, two bumps 41 are provided, and the two bumps 41 are disposed oppositely; correspondingly, the mounting surface 11 and the sounding feedback assembly are both provided with two.
As shown in fig. 14 and 15, the first energy storage element 5 in the energy storage state is a torsion spring, the protrusion 41 is provided with a first fixing hole 412, the outer periphery of the push rod 2 is provided with a second fixing hole 221, both the axis of the first fixing hole 412 and the axis of the second fixing hole 221 are parallel to the axis of the guide tube 1, one end of the torsion spring is inserted into the first fixing hole 412, and the other end of the torsion spring is inserted into the second fixing hole 221. The torsion spring is fixed with the sounding ring 4 and the push rod 2 through the first fixing hole 412 and the second fixing hole 221, so that the sounding ring 4 rotates to enable the first energy storage element 5 to store energy; the first energy storage element 5 in the energy storage state releases energy and can drive the sounding ring 4 to rotate, so that the sounding ring 4 collides with the first abutting surface 121 to generate an obvious initial prompt sound, and collides with the terminating surface 13 to generate an obvious terminating prompt sound, the user can hear the sound more clearly, and the user who receives the injection and has weak perception ability can control the injection process.
The audible feedback mechanism provided by the embodiment can adjust the sound levels of the start prompt tone and the end prompt tone by selecting the first energy storage element 5 with different elastic coefficients, adjusting the length of the inclined surface 122, adjusting the relative heights of the guide surface 12 and the mounting surface 11 in the circumferential direction of the guide pipe 1 or adjusting the height difference of the second abutting surface 123 and the end surface 13 in the circumferential direction of the guide pipe 1 during the production process. The larger the elastic coefficient is, the larger the driving force of the first energy accumulating element 5 is, the larger the start warning tone and the end warning tone are; the greater the difference in height between the guide surface 12 and the mounting surface 11 in the circumferential direction of the guide tube 1, the greater the initial sound emitted; the longer the length of the inclined surface 122 is, the greater the difference in height between the second abutment surface 123 and the terminating surface 13 in the circumferential direction of the guide tube 1 is, the greater the termination warning sound is emitted.
The surface interval of push rod 2 is provided with first spacing portion 21 and the spacing portion 22 of second, the sound production ring 4 is located between first spacing portion 21 and the spacing portion 22 of second with the first energy storage component 5 that is in the energy storage state, the one end and the first spacing portion 21 cooperation of the first energy storage component 5 that is in the energy storage state are kept away from to sound production ring 4, the one end and the spacing portion 22 cooperation of second that the sound production ring 4 is kept away from to the first energy storage component 5 that is in the energy storage state, second fixed orifices 221 sets up in the spacing portion 22 of second. The position of the sounding ring 4 on the push rod 2 is limited by the first limiting part 21 and the second limiting part 22, so that the sounding ring 4 is prevented from being separated from the push rod 2 in the energy storage and release processes of the first energy storage element 5 in the energy storage state.
The second limiting portion 22 is provided with a fixing portion, and the second fixing hole 221 is disposed in the fixing portion, so that the height of the second fixing hole 221 is matched with the height of the insertion portion of the torsion spring. Two ends of the torsion spring are respectively provided with an inserting part.
The first position-limiting part 21 comprises two oppositely arranged position-limiting tables, and the second position-limiting part 22 is arranged as an annular ring.
The engaging ring 23 is disposed close to the second limiting portion 22, and in order to adapt to the length of the insertion portion of the torsion spring, fixing portions are also disposed on the engaging ring 23, and second fixing holes 221 on the two fixing portions are disposed oppositely, so that the insertion portion of the torsion spring, which is far away from one end of the sounding ring 4, is inserted into the second fixing holes 221 on the two fixing portions.
The working principle of the audible feedback mechanism of the automatic injection device provided by the embodiment is as follows:
as shown in fig. 18 and 19, by providing the mounting surface 11 on the inner wall of the guide tube 1, when the injection drive mechanism is in the initial state, the sound feedback surface 411 of the sound emitting ring 4 abuts against the mounting surface 11, and at this time, the first energy storage element 5 is in the energy storage state. Because the second energy storage element 6 has the tendency of resetting to release energy, a far-end to near-end thrust F is generated on the push rod 2 and the sounding ring 4 1 (not shown in the figure), the first energy storage element 5 in the energy storage state needs to be reset to release energy in a rotating way, and a radial clockwise tangential force F is generated on the push rod 2 from a near-end view 2 Will generate a radial counterclockwise tangential force F to the sounding ring 4 3 At F 1 、F 2 And F 3 Under the action of the elastic element, the clamping block and the clamping block 24 of the push rod 2 tend to be attached to the first sliding groove 15, the projection 41 of the sounding ring 4 tends to slide into the guide surface 12, and the push rod 2 drives the sounding ring 4 to move towards the near end.
As shown in fig. 20 and 21, at the moment when the injection driving mechanism is triggered by the protecting sleeve 102, since the first energy accumulating element 5 in the energy accumulating state needs to be rotated to return to release energy, the projection 41 slides into the guiding surface 12, the audible feedback surface 411 of the projection 41 hits the first abutting surface 121, and a first "click" is made to sound, which prompts the recipient to start injecting. As the sounding ring 4 continues to move from the distal end to the proximal end, the protrusion 41 continues to slide along the inclined surface 122 and the second abutting surface 123 of the guide surface 12, the inclined surface 122 enables the sounding ring 4 to rotate around the axis of the push rod 2, the first energy storage element 5 stores energy, when the sounding ring 4 slides to the second abutting surface 123, the first energy storage element 5 stores energy, the second abutting surface 123 limits the protrusion 41, and the sounding ring 4 is prevented from continuing to rotate under the action of the first energy storage element 5 in the energy storage state. The push rod 2, the first energy storage element 5 in the energy storage state and the sound producing ring 4 are kept in a relatively static state under the action of the second energy storage element 6 and move linearly from the far end to the near end together. With the sound ring 4 moving continuously, when the sound ring 4 is completely separated from the second abutting surface 123, the second abutting surface 123 no longer limits the bump 41 and is in an energy storage stateThe first energy storage element 5 releases the stored torsion force to drive the sounding ring 4 to start to rotate around the axis of the push rod 2 in the circumferential direction (in the anticlockwise tangential force F) 3 Under the action of the elastic force of the elastic ring 4, when the sounding ring moves from the second abutting surface 123 to the terminating surface 13, the energy of the first energy storage element 5 in the energy storage state is relatively large, so that the sounding feedback surface 411 impacts the terminating surface 13 to generate a second sound "click" impact sound, thereby prompting the injector to finish the injection.
In this embodiment, when the sound feedback surface 411 impacts the terminating surface 13, the energy of the first energy storage element 5 in the energy storage state is not completely released.
The working principle of the automatic injection device provided by the embodiment is as follows:
the release sleeve 3 is driven by the protection sleeve 102 to move from the proximal end to the distal end, when the release opening 31 of the release sleeve 3 reaches the upper part of the elastic arm 14 on the guide tube 1, the release sleeve 3 loses the circumferential limitation on the elastic arm 14, the elastic arm 14 springs outward, that is, the clamping protrusion 141 on the elastic arm 14 springs out from between the clamping ring 23 and the clamping block 24, at this time, the push rod 2 loses the limitation of circumferential rotation, and the second energy storage element 6 resets and releases energy to drive the push rod 2 to move from the distal end to the proximal end.
When the push rod 2 moves from the far end to the near end, the push force F borne by the push rod 2 enables the first energy storage element 5 in the energy storage state to tend to reset, and drives the sounding ring 4 to slide into the guide surface 12 from the mounting surface 11 to emit a first click-type initial prompt sound, so as to prompt the injector to start injection. The second energy storage element 6 continuously releases energy to drive the push rod 2 and the sounding ring 4 to continuously move towards the near end, the sounding feedback surface 411 of the protruding block 41 slides along the first abutting surface 121, the inclined surface 122 and the second abutting surface 123, when the sounding ring 4 slides on the inclined surface 122, the first energy storage element 5 continuously stores energy, when the sounding ring 4 moves to the second abutting surface 123, the sounding ring 4 stops rotating, and the first energy storage element 5 stops storing energy. When the sounding ring 4 moves from the second abutting surface 123 to the terminating surface 13, a second sound "click" is generated to indicate the end of injection by the person receiving the injection.
In the process that the push rod 2 moves from the far end to the near end, the fixture block and the clamping block 24 always move from the far end to the near end along the first sliding groove 15. When the pressing block 26 on the push rod 2 moves to the second sliding groove 92 of the limiting ring 9, the limiting arm abuts against the clamping ring 23, the push rod 2 cannot move, meanwhile, the pressing block 26 limits the pushing force to be too large, so that the limiting clamping hook 91 rushes out from the third fixing hole 19, the injector receives the termination prompt sound, and the pushing of the liquid medicine is completed. After the liquid medicine is pushed, the person receiving the injection removes the automatic injection device from the skin surface, the driving force acting on the release sleeve 3 disappears, the release sleeve 3 is reset under the action of the elastic restoring force of the third energy storage element 8, the elastic arm 14 is compressed in the release sleeve 3 under the force, the clamping protrusion 141 is clamped between the clamping block and the clamping block 24, and the protection sleeve 102 moves towards the proximal direction along the shell 101 under the action of the release sleeve 3, so that the injection needle retracts.
The automatic injection device using the sounding feedback mechanism can send out a starting prompt tone and a stopping prompt tone to prompt an injector to receive an injection process in the injection process, can effectively avoid the influence of the external environment on the sounding feedback mechanism, and prevents the injector from mistakenly judging the injection process to cause damage in the injection process; but also reduces the cost of the automatic injection device.
Example three:
for a person who receives high-dose liquid medicine infusion, the infusion time is too long, so that the person who receives the injection cannot hear the termination prompt sound because of waiting for a long time to hear the prompt sound of injection completion, and the experience is poor. To solve this problem, the audible feedback mechanism of the automatic injection device provided in this embodiment is a continuous audible feedback mechanism, i.e., a mechanism that sounds at set intervals from the start of injection to the completion of injection, and when the audible feedback mechanism does not hear the audible feedback mechanism, it indicates that the injection is completed.
The automatic injection device provided by the present embodiment has substantially the same structure as the automatic injection device provided by the second embodiment, and the difference is that: the guide surface 12 is provided.
In the present embodiment, a plurality of guide surfaces 12 are provided in sequence on the tube wall of the guide tube 1 between the mounting surface 11 and the terminating surface 13. During operation, the sound ring 4 impacts each guide surface 12 in turn to generate sound, so as to generate continuous signal feedback. Behind the mounting surface 11 on the tube wall of the guide tube 1, a first guide surface, a second guide surface, a third guide surface, 8230, 8230and a stop surface are provided in this order, the number of guide surfaces 12 being set according to the dosage of the liquid medicine.
When the push rod 2 is released and moves from the far end to the near end, the lug 41 of the sounding ring 4 collides with the first abutting surface 121 of the first guide surface to generate sound, then the first energy storage element 5 stores force on the inclined surface 122 of the first guide surface and moves to the second abutting surface 123 of the first guide surface continuously, when the sounding ring 4 moves to the first abutting surface 121 of the second guide surface, the lug 41 collides with the first abutting surface 121 of the second guide surface to generate sound, the first energy storage element 5 stores force through the inclined surface 122 of the second guide surface to \8230, and the termination prompt sound is generated until the lug 41 collides with the termination surface 13, namely, the automatic injection device generates sound at intervals in the injection process, and prompts an injector to inject. When no alert tone is heard, the injection is complete.
The continuous sounding arrangement has more obvious prompting effect on people with insensitive annual reaction and hearing-impaired people who receive injections. The continuous sounding can continuously remind the injector of the injection process, even if the impact sound of the second click is missed, the continuous sound can still be heard in the subsequent injection process until the impact sound of the last click is finished and the impact sound is not heard any more, so that the injection is finished, and the injector is prevented from mistakenly judging the injection process to cause injury in the injection process.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the present invention is limited to the details of the embodiment and the range of applications, which can be changed by those skilled in the art according to the spirit of the present invention.

Claims (23)

1. The sounding feedback mechanism is used for an automatic injection device, the automatic injection device comprises a guide pipe (1), the sounding feedback mechanism comprises a sounding ring (4), a first energy storage element (5) in an energy storage state and a sounding feedback assembly, and the first energy storage element (5) in the energy storage state provides kinetic energy for the sounding ring (4); the sound production feedback subassembly includes spigot surface (12) and terminal surface (13), its characterized in that, spigot surface (12) include first butt face (121), second butt face (123) and are located first butt face (121) with inclined plane (122) between second butt face (123), sound production ring (4) are in the motion process, from installation face (11) of stand pipe (1) move extremely produce the initial warning sound during first butt face (121), sound production ring (4) are in the drive of moving on inclined plane (122) sound production ring (4) rotation energy makes first energy storage component (5) the continuation energy storage in the energy storage state, sound production ring (4) certainly second butt face (123) move extremely produce the termination warning sound when terminal surface (13).
2. The audible feedback mechanism according to claim 1, characterized in that a bump (41) is provided on an outer surface of the audible ring (4), the bump (41) includes an audible feedback surface (411), the audible feedback surface (411) is a side surface of the bump (41) connected to the audible ring (4), the audible feedback surface (411) can abut against the installation surface (11) and can be sequentially matched with the guide surface (12) and the stop surface (13).
3. The audible feedback mechanism according to claim 2, wherein the automatic injection device comprises a push rod (2), the push rod (2) is disposed in the guide tube (1), the audible ring (4) and the first energy storage element (5) in the energy storage state are sleeved outside the push rod (2), one end of the first energy storage element (5) in the energy storage state is fixed to the audible ring (4), and the other end of the first energy storage element is fixed to the push rod (2).
4. The audible feedback mechanism according to claim 3, wherein the first energy storage element (5) in the energy storage state is a torsion spring, the protrusion (41) is provided with a first fixing hole (412), the outer periphery of the push rod (2) is provided with a second fixing hole (221), both the axis of the first fixing hole (412) and the axis of the second fixing hole (221) are parallel to the axis of the guide tube (1), one end of the torsion spring is inserted into the first fixing hole (412), and the other end of the torsion spring is inserted into the second fixing hole (221).
5. The audible feedback mechanism according to claim 4, wherein a first limiting portion (21) and a second limiting portion (22) are disposed at an interval on an outer surface of the push rod (2), the audible ring (4) and the first energy storage element (5) in the energy storage state are disposed between the first limiting portion (21) and the second limiting portion (22), one end of the audible ring (4) away from the first energy storage element (5) in the energy storage state is matched with the first limiting portion (21), one end of the audible ring (4) away from the first energy storage element (5) in the energy storage state is matched with the second limiting portion (22), and the second fixing hole (221) is disposed in the second limiting portion (22).
6. The audible feedback mechanism according to any one of claims 1 to 5, characterized in that a plurality of said guide surfaces (12) are sequentially arranged on the wall of said guide tube (1) between said mounting surface (11) and said terminating surface (13), and during operation, said audible ring (4) sequentially collides with each said guide surface (12) to generate sound, so as to generate continuous signal feedback.
7. An automatic injection device comprising an audible feedback mechanism as claimed in any one of claims 1 to 6.
8. The injection driving mechanism is used for an automatic injection device and comprises a protective sleeve (102) and a shell (101), and the injection driving mechanism comprises a guide tube (1), a push rod (2) and a release sleeve (3), and is characterized in that an elastic arm (14) of the guide tube (1) is matched with a clamping part of the push rod (2) to form a limiting assembly, the release sleeve (3) is provided with a release opening (31), one end, extending into the shell (101), of the protective sleeve (102) is contacted with the release sleeve (3), and when the injection driving mechanism is not released, the elastic arm (14) is abutted against the clamping part to position the push rod (2); the protection sleeve (102) moves axially to drive the release sleeve (3) to move axially, when the release port (31) reaches the position of the elastic arm (14), the elastic arm (14) springs outwards and is separated from the clamping part, the guide tube (1) releases the limit of the push rod (2), the push rod (2) moves from the far end to the near end, the injection driving mechanism is released, and the near end is the end close to an injector.
9. The injection drive mechanism according to claim 8, wherein the engaging portion comprises an engaging ring (23) and an engaging block (24), the engaging ring (23) is disposed on the outer periphery of the push rod (2), the engaging ring (23) and the engaging block (24) are disposed at intervals along the axial direction of the push rod (2), and the elastic arm (14) is engaged between the engaging ring (23) and the engaging block (24).
10. The injection drive mechanism according to claim 9, wherein the inner wall of the guide tube (1) is provided with a first sliding slot (15), and the engaging block (24) moves along the first sliding slot (15) to limit the rotation of the push rod (2).
11. Injection drive mechanism according to claim 9, wherein the push rod (2) comprises a central bore (25) with one end open, a second energy accumulating element (6) being arranged in the central bore (25); one end of the guide pipe (1) is provided with an end face, one end of the second energy storage element (6) is abutted to the end face of the guide pipe (1), and the other end of the second energy storage element is abutted to the bottom of the central hole (25).
12. The injection drive mechanism according to claim 11, further comprising a bottom cap (7), wherein a guide rod (71) is disposed at the center of the bottom cap (7), the bottom cap (7) is fixedly connected to the guide tube (1), the guide rod (71) can enter the central hole (25), and the second energy accumulating element (6) is sleeved on the guide rod (71).
13. The injection drive mechanism according to claim 12, wherein the end of the guide tube (1) having the end face is provided with a first fixing ring (16), the bottom cap (7) is provided with a hook (72), and the hook (72) is engaged with the first fixing ring (16) to fix the bottom cap (7) and the guide tube (1).
14. Injection drive mechanism according to claim 13, wherein one end of the release sleeve (3) is provided with a second retaining ring (32), and the outer circumference of the release sleeve (3) is provided with a third energy accumulating element (8), one end of the third energy accumulating element (8) abutting the first retaining ring (16) and the other end abutting the second retaining ring (32).
15. The injection drive mechanism according to claim 14, wherein a stop member (17) is arranged at an end of the guide tube (1) remote from the end surface, a limit groove (33) is arranged on the release sleeve (3), the limit groove (33) is arranged between the release port (31) and the second fixing ring (32), and the stop member (17) abuts against an end of the limit groove (33) to limit the first limit position of the release sleeve (3); the stop piece (17) is abutted against the other end of the limiting groove (33) to limit the second limit position of the release sleeve (3).
16. The injection drive mechanism according to claim 11, further comprising a stop ring (9), wherein the stop ring (9) is arranged at an end of the guide tube (1) remote from the end surface, and the stop ring (9) is used for limiting the limit position of the push rod (2).
17. The injection drive mechanism according to claim 16, wherein the guide tube (1) is provided with a third fixing hole (19), the stop collar (9) is provided with a stop hook (91), and the stop hook (91) cooperates with the third fixing hole (19) to fix the stop collar (9) to the guide tube (1).
18. The injection drive mechanism according to claim 17, wherein the stop collar (9) comprises a stop arm, and wherein the plunger (2) is moved from the distal end to the proximal end, causing the snap ring (23) to move into abutment with a side of the stop arm remote from the proximal end, so as to limit the limit position of the plunger (2).
19. The injection driving mechanism according to claim 18, wherein the limiting hook (91) is disposed on the limiting arm and penetrates through the limiting arm, a second sliding groove (92) is disposed on an inner side of the limiting arm, the second sliding groove (92) extends from one end of the limiting arm, which is far away from the proximal end, to the limiting hook (91), two of the two clamping blocks (24) are disposed, a pressing block (26) is disposed between the two clamping blocks (24), the push rod (2) moves to drive the pressing block (26) to move to abut against the limiting hook (91), so as to limit the limiting hook (91) from being flushed out of the third fixing hole (19) when the push rod (2) moves at a high speed.
20. Injection drive mechanism according to claim 8, wherein the inner wall of the release sleeve (3) is provided with a first stop recess (34), the outer circumference of the guide tube (1) is provided with a first stop protrusion (18), and the first stop protrusion (18) cooperates with the first stop recess (34) to limit the relative rotation of the release sleeve (3) and the guide tube (1).
21. Auto-injector, characterized in that it comprises a housing (100), an injection mechanism (200) and an injection drive mechanism according to any of claims 8-20, said injection mechanism (200) and said injection drive mechanism being both provided in said housing (100), said injection mechanism (200) being mounted at an end of said injection drive mechanism near said proximal end.
22. An autoinjector according to claim 21, wherein an end of said release sleeve (3) adjacent said proximal end is provided with a second stop projection (321), and an inner wall of said case (100) is provided with a second stop recess, said second stop projection (321) cooperating with said second stop recess to limit rotation of said release sleeve (3).
23. An autoinjector characterized in that it comprises an audible feedback mechanism according to claim 1 and an injection drive mechanism according to claim 8.
CN202211485881.1A 2022-11-24 2022-11-24 Sound feedback mechanism, injection driving mechanism and automatic injection device Pending CN115887829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211485881.1A CN115887829A (en) 2022-11-24 2022-11-24 Sound feedback mechanism, injection driving mechanism and automatic injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211485881.1A CN115887829A (en) 2022-11-24 2022-11-24 Sound feedback mechanism, injection driving mechanism and automatic injection device

Publications (1)

Publication Number Publication Date
CN115887829A true CN115887829A (en) 2023-04-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211485881.1A Pending CN115887829A (en) 2022-11-24 2022-11-24 Sound feedback mechanism, injection driving mechanism and automatic injection device

Country Status (1)

Country Link
CN (1) CN115887829A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116942962A (en) * 2023-07-28 2023-10-27 苏州森恩博医疗科技有限公司 Automatic injection pen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116942962A (en) * 2023-07-28 2023-10-27 苏州森恩博医疗科技有限公司 Automatic injection pen
CN116942962B (en) * 2023-07-28 2024-03-08 苏州森恩博医疗科技有限公司 Automatic injection pen

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