Injection device

Abstract

The invention relates to an injection device which comprises an injection rod, a shell, a guide sleeve, a trigger sleeve, an injection elastic piece and an injection sound production mechanism, and the injection rod is used for pushing a piston in an injection liquid container to move; the shell can push the guide sleeve to move in a first direction during injection; the guide sleeve is used for driving the injection rod to move relative to the trigger sleeve, sleeves the injection rod and is provided with a guide groove for guiding the injection rod to perform injection movement; the trigger sleeve sleeves the guide sleeve and is provided with a trigger structure for guiding the injection rod to rotate by a first preset angle around a first direction during injection; a first protrusion penetrating out of the outer wall of the guide sleeve is arranged on the periphery of the injection rod. The injection sounding mechanism comprises a first sounding piece and / or a second sounding piece; the first sounding piece is located or connected to the near end of the injection rod, and the second sounding piece is located or connected to the far end of the piston. According to the technical scheme, the prompt tone for starting injection can be synchronously given out during injection.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and particularly to an injection device. Background Art

[0002] An auto-injector is a medical device that can automatically inject the liquid medicine in a pre-filled syringe into a patient's body, and can meet the needs of users for self-administration. An auto-injector is a medical device for self-use by a user (patient). Since ordinary users are not professional medical staff, generally, an auto-injector is usually required to have characteristics such as being simple to use and highly reliable. For example, there is a prompt sound at the start or end of injection.

[0003] Some injection pens currently produced are designed with a dedicated trigger prompt sound structure to remind the user to start injection. However, since the transmission mechanism of the prompt sound is independent of the injection action mechanism, there are often situations where the trigger prompt sound is earlier or later than the actual start time of injection, and in some cases, the prompt sound has already been emitted but the injection has not started, resulting in injection failure. Summary of the Invention

[0004] In view of this, the present application provides an injection device to solve at least one problem in the background art.

[0005] To achieve the above object, the technical solution of the present application is realized as follows:

[0006] An embodiment of the present application provides an injection device, including an injection rod, a housing, a guide sleeve, a trigger sleeve, an injection elastic member, and an injection sound generating mechanism, wherein:

[0007] The injection rod is used to perform an injection movement in a first direction during injection, and push the piston in the injection liquid container to move;

[0008] The housing includes a proximal end and a distal end opposite thereto; the housing can push the guide sleeve to move in the first direction during injection, so as to push the injection needle of the injection liquid container into the target organism;

[0009] The guide sleeve is used to drive the injection rod to move relative to the trigger sleeve to trigger the injection movement; the guide sleeve is sleeved on the injection rod and is provided with a guide groove for guiding the injection rod to perform the injection movement;

[0010] The trigger sleeve is sleeved on the guide sleeve and is provided with a trigger structure for guiding the injection rod to rotate a first preset angle around the first direction during injection, and the trigger structure is an inclined surface or a curved surface; a first protrusion that cooperates with the trigger structure and penetrates the outer wall of the guide sleeve is provided on the outer periphery of the injection rod;

[0011] The injection sound generating mechanism includes a first sound generating member, and / or a second sound generating member; the first sound generating member is located at or connected to the proximal end of the injection rod, and the second sound generating member is located at or connected to the distal end of the piston; during injection, the injection sound generating mechanism makes a sound through one or more of the following: the first sound generating member impacts the proximal end of the injection rod, the first sound generating member impacts the second sound generating member, and the injection rod impacts the second sound generating member.

[0012] Optionally, the first sound generating member is movably connected to the proximal end of the injection rod.

[0013] Optionally, the movable connection includes: one of the first sound generating member and the injection rod is provided with a first guiding hole in a first direction, and the other is provided with a first guiding rod that cooperates with the guiding hole, and the first guiding rod and the first guiding hole are in a transition fit.

[0014] Optionally, the movable connection includes: one of the first sound generating member and the injection rod is provided with a second guiding hole in a first direction, and the other is provided with a second guiding rod that cooperates with the second guiding hole; the second guiding rod and the second guiding hole are in a clearance fit, and at least one of the second guiding hole and the second guiding rod is provided with a first preset structure for increasing the sliding resistance to increase the resistance to the relative sliding of the second guiding hole and the second guiding rod.

[0015] Optionally, the first preset structure is a bump provided on the inner wall of the second guiding hole or the outer wall of the second guiding rod.

[0016] Optionally, the end face of the proximal end of the injection rod is provided with at least one groove to reduce the area of impact with the first sound generating member.

[0017] Optionally, the injection device further includes a needle protection sleeve, and the needle protection sleeve axially abuts against the proximal end of the trigger sleeve; the needle protection sleeve circumferentially surrounds the injection needle of the injection liquid container when not injecting, and abuts against the injection site of the target organism during injection, so that the injection liquid container can move relative to the needle protection sleeve in a first direction under the action of the guiding sleeve, and further make the injection needle penetrate into the target organism.

[0018] Optionally, the housing includes a tube body and an end cap connected to the distal end of the tube body; the end cap abuts against the guiding sleeve in a first direction, and during injection, the end cap pushes the guiding sleeve to move in the first direction.

[0019] Optionally, the side wall of the tube body includes a first clamping groove, and the outer wall of the end cap is provided with a first clamping tongue that cooperates with the first clamping groove, and the end cap is fixedly connected to the tube body through the first clamping groove and the first clamping tongue.

[0020] Optionally, the injection device further includes a needle cap and a tube cap; the needle cap is sleeved on the proximal end of the injection liquid container to cover the injection needle; the tube cap is sleeved on the proximal end of the outer shell to close the proximal end of the outer shell; the tube cap and the needle cap are axially linked.

[0021] The injection device provided by the embodiment of the present application includes an injection rod, an outer shell, a guiding sleeve, a trigger sleeve, an injection elastic member, and an injection sound generating mechanism, wherein: the injection rod is used to perform an injection movement in a first direction during injection to push a piston in the injection liquid container to move; the outer shell includes a proximal end and a distal end opposite thereto; the outer shell can push the guiding sleeve to move in the first direction during injection to push the injection needle of the injection liquid container into a target organism; the guiding sleeve is used to drive the injection rod to move relative to the trigger sleeve to trigger the injection movement; the guiding sleeve is sleeved on the injection rod and is provided with a guiding groove for guiding the injection rod to perform the injection movement; the trigger sleeve is sleeved on the guiding sleeve and is provided with a trigger structure for guiding the injection rod to rotate a first preset angle around the first direction during injection, and the trigger structure is an inclined surface or a curved surface; a first protrusion that cooperates with the trigger structure and penetrates through the outer wall of the guiding sleeve is provided on the outer periphery of the injection rod; the injection sound generating mechanism includes a first sound generating member and / or a second sound generating member; the first sound generating member is located at or connected to the proximal end of the injection rod, and the second sound generating member is located at or connected to the distal end of the piston; during injection, the injection sound generating mechanism emits sound through one or more of the following: the first sound generating member impacts the proximal end of the injection rod, the first sound generating member impacts the second sound generating member, and the injection rod impacts the second sound generating member. It can be seen that in the injection device of the embodiment of the present application, the sound generating mechanism is arranged on the injection rod of the injection action mechanism or on the piston that is acted on during injection, so that the emission of the trigger prompt sound is synchronized with the actual injection time. Therefore, the injection device of the embodiment of the present application can emit a prompt sound indicating the start of injection synchronously during injection, reducing the failure of injection.

[0022] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present application. Description of the Drawings

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0024] Figure 1 is a schematic diagram of the injection device provided by the embodiment of the present application;

[0025] Figure 2 Exploded view of the injection device provided by the embodiment of the present application;

[0026] Figure 3 Cross-sectional view of the injection device provided by the embodiment of the present application;

[0027] Figure 4 Schematic diagram of the injection rod in the injection device provided by the embodiment of the present application;

[0028] Figure 5 Schematic diagram of the guide sleeve in the injection device provided by the embodiment of the present application;

[0029] Figure 6 Schematic diagram of the trigger sleeve in the injection device provided by the embodiment of the present application Figure 1 ;

[0030] Figure 7 Schematic diagram of the trigger sleeve in the injection device provided by the embodiment of the present application Figure 2 ;

[0031] Figure 8 Schematic diagram of the elastic member bracket in the injection device provided by the embodiment of the present application;

[0032] Figure 9 is Figure 3 Partial enlarged view at position A in;

[0033] Figure 10 Schematic diagram of the injection rod in the injection device provided by the embodiment of the present application before the trigger injection movement;

[0034] Figure 11 is Figure 10 Partial enlarged view at position C in;

[0035] Figure 12 Schematic diagram of the injection rod in the injection device provided by the embodiment of the present application after the trigger injection movement;

[0036] Figure 13 is Figure 12 Partial enlarged view at position D in;

[0037] Figure 14 Schematic diagram of the tube body in the injection device provided by the embodiment of the present application;

[0038] Figure 15 Schematic diagram of the end cap in the injection device provided by the embodiment of the present application.

[0039] Explanation of reference numerals:

[0040] 10. Injection rod; 11. First protrusion; 20. Outer shell; 21. Tube body; 211. First card slot; 22. End cap; 221. First tongue; 23. Tube cap; 30. Guide sleeve; 31. Guide groove; 40. Trigger sleeve; 41. Trigger structure; 51. Injection elastic member; 52. Elastic member bracket; 521. Top cover; 522. Limit post; 61. First sound - emitting member; 70. Injection liquid container; 71. Piston; 72. Bottle body; 73. Injection needle; 731. Needle cover; 80. Needle protection sleeve. Detailed implementation manners

[0041] To make the technical solutions and beneficial effects of this application more obvious and understandable, the following will be described in detail by listing specific embodiments. To make the introduction more concise, for some prior arts related to the embodiments of this application but having little relation to the innovative points of this application, they may not be introduced in the embodiments of this application. Readers can refer to the relevant prior arts, such as the invention patent with the publication number CN116942962B.

[0042] In this application, the drawings are not necessarily drawn to scale, and local features can be enlarged or reduced to more clearly show the details of local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0043] In the description of this application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of simplifying the description of this application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, that is, it cannot be understood as a limitation to this application.

[0044] In this application, the terms "first" and "second" are only used for the purpose of clear description, and cannot be understood as the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined with "first" and "second" can clearly include at least one such feature. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc.; the meaning of "several" is at least one, such as one, two, three, etc.; unless otherwise clearly and specifically defined.

[0045] In this application, unless otherwise clearly defined, terms such as "installation", "connection", "linkage", "fixation", "setting", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can also be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In this application, unless otherwise clearly defined, the first feature being "on", "above", "over", "upward", "under", "beneath", "below", or "downward" of the second feature can be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", or "upward" of the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. The first feature being "under", "beneath", or "downward" of the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature. To thoroughly understand this application, detailed steps and detailed structures of preferred embodiments will be presented in the following description to illustrate the technical solutions of this application. However, in addition to the preferred embodiments, this application can also have other implementation manners.

[0047] In view of the technical problems in the related art, an embodiment of this application provides an injection device. Referring to Figures 1 - 3 , the injection device includes an injection rod 10, a housing 20, a guiding sleeve 30, a trigger sleeve 40, an injection elastic member 51, and an injection sound generating mechanism, where:

[0048] The injection rod 10 is used to perform an injection movement in the first direction during injection, and push the piston 71 in the injection liquid container 70 to move;

[0049] It can be understood that the injection liquid container 70 can be a medicine bottle loaded with a fluid medicine solution. The injection liquid container 70 can include a bottle body 72, a piston 71, and an injection needle 73.

[0050] It can be understood that the movement of the piston 71 refers to the movement inside the injection liquid container 70. The movement of the piston 71 can squeeze the injection liquid in the injection liquid container 70 to flow out towards the outlet end, for example, flow out from the injection needle 73.

[0051] The first direction may be the axial direction of the injection liquid container 70. Since the injection rod 10, the outer shell 20, etc. are also arranged corresponding to the injection liquid container 70, the first direction may also be the axial direction of components such as the injection rod 10 and the outer shell 20.

[0052] The outer shell 20 includes a proximal end and an opposite distal end; the outer shell 20 can push the guide sleeve 30 to move in the first direction during injection, so as to push the injection needle 73 of the injection liquid container 70 into the target organism.

[0053] It can be understood that the proximal end is the end close to the target organism during injection, and the distal end is the opposite end. Similarly, other components can also be divided into a proximal end and a distal end according to the direction during injection.

[0054] The guide sleeve 30 is used to drive the injection rod 10 to move relative to the trigger sleeve 40 to trigger the injection movement; the guide sleeve 30 is sleeved on the injection rod 10 and is provided with a guide groove 31 for guiding the injection rod 10 to perform the injection movement; the guide groove 31 is arranged on the side wall of the guide sleeve 30 and extends along the first direction, refer to Figure 5 ;

[0055] Specifically, the distal end of the guide sleeve 30 axially abuts against the outer shell 20. During injection, the outer shell 20 moves towards the target organism in the first direction, driving the guide sleeve 30 to move in the first direction.

[0056] Specifically, before the injection rod 10 enters the injection movement, the movement of the guide sleeve 30 in the first direction can drive the injection rod 10 to move in the first direction, that is, to move relative to the trigger sleeve 40.

[0057] After the injection rod 10 enters the injection movement, it can perform the injection movement along the direction of the guide groove 31. Through the guide groove 31, the moving direction of the injection rod 10 can be made more stable.

[0058] The trigger sleeve 40 is sleeved on the guide sleeve 30 and is provided with a trigger structure 41 for guiding the injection rod 10 to rotate a first preset angle around the first direction during injection, and the trigger structure 41 is an inclined surface or a curved surface; a first protrusion 11 that cooperates with the trigger structure 41 and penetrates the outer wall of the guide sleeve 30 is provided on the outer periphery of the injection rod 10, refer to Figure 4 ; after the injection rod 10 rotates a first preset angle, it can perform the injection movement along the guide under the elastic force of the injection elastic member 51.

[0059] Specifically, the triggering structure 41 is an inclined surface or an arc surface. When the injection rod 10 moves relative to the triggering sleeve 40, the first protrusion 11 abuts against the inclined surface or the arc surface and moves along the extension direction of the inclined surface or the arc surface, causing the injection rod 10 to rotate by a first preset angle in a first direction. The first preset angle can be 5 degrees to 30 degrees.

[0060] In this embodiment, the triggering structure 41 is an inclined surface. Refer to Figure 6 and Figure 7 。

[0061] It can be understood that the injection movement of the injection rod 10 is formed under the elastic force of the injection elastic member 51. In this way, in addition to the simpler operation of the user, the injection process is also relatively stable and will not be affected by improper force application of the user.

[0062] Specifically, one end of the injection elastic member 51 abuts against the injection rod 10. Before injection, the injection elastic member 51 is in a compressed state, but it cannot exert elastic force because the axial position of the injection rod 10 is restricted. After the injection rod 10 rotates by the first preset angle, the first protrusion 11 of the injection rod 10 enters the guiding groove 31, and the axial position restriction is released. Under the elastic force of the injection elastic member 51, the injection rod 10 moves along the direction of the guiding groove 31 to perform the injection movement.

[0063] Specifically, the injection device further includes an elastic member bracket 52 that restricts the injection elastic member 51. The proximal end of the injection elastic member 51 abuts against the injection rod 10, and the distal end abuts against the elastic member bracket 52. Before injection, the injection elastic member 51 is compressed between the injection rod 10 and the elastic member bracket 52. After the axial position restriction of the injection rod 10 is released, the elastic force of the injection elastic member 51 drives the injection rod 10 to move.

[0064] More specifically, refer to Figure 8 , the elastic member bracket 52 includes a top cover 521 and a limiting post 522 connected to the bottom wall of the top cover 521. The injection elastic member 51 is sleeved on the limiting post 522; the other end of the injection elastic member 51 abuts against the top cover 521.

[0065] More specifically, the injection elastic member 51 can be a compression spring. The compression spring can more precisely control the elastic force through parameters such as wire diameter and pitch, and has a low cost.

[0066] The injection sound - generating mechanism includes a first sound - generating member 61, and / or a second sound - generating member; the first sound - generating member 61 is located at or connected to the proximal end of the injection rod 10, and the second sound - generating member is located at or connected to the distal end of the piston 71; during injection, the injection sound - generating mechanism makes a sound through one or more of the following: the first sound - generating member 61 impacts the proximal end of the injection rod 10, the first sound - generating member 61 impacts the second sound - generating member, and the injection rod 10 impacts the second sound - generating member.

[0067] That is, by providing a sound - generating member on the injection rod 10 and / or the piston 71, a sound is generated when an impact occurs at the beginning of the injection movement. The structure is simple and will not be out of sync with the actual trigger time. The sound - generating member is a general term for the first sound - generating member 61 and the second sound - generating member.

[0068] Specifically, the sound - generating member can be made of a material with relatively high hardness. In this way, the sound loudness is large. More specifically, the sound - generating member can be a hard - plastic material, such as polycarbonate (PC), nylon with glass fiber, polyoxymethylene (POM), etc.

[0069] Furthermore, the first sound - generating member can also be a part of the injection - rod body. If the distance between the injection rod and the piston is far enough, a sound sufficient to remind the user can also be generated. Similarly, the second sound - generating member can also be a part of the piston body.

[0070] Specifically, the injection device further includes a needle protection sleeve 80. The needle protection sleeve 80 axially abuts against the proximal end of the trigger sleeve 40; the needle protection sleeve 80 circumferentially encloses the injection needle 73 of the injection liquid container 70 when not in injection, and abuts against the injection site of the target organism during injection, so that the injection liquid container 70 can move relative to the needle protection sleeve 80 along a first direction under the action of the guiding sleeve 30, and further make the injection needle 73 penetrate into the target organism.

[0071] That is, the needle protection sleeve 80 is a supporting member for the user to apply force. After the needle protection sleeve 80 abuts against the injection site of the target organism, the user can conveniently apply force on the outer shell 20. The outer shell 20 moves towards the target organism, that is, moves relative to the needle protection sleeve 80, driving the injection needle 73 of the injection liquid container 70 to protrude from the needle protection sleeve 80 and penetrate into the target organism. And because the needle protection sleeve 80 does not move, the lateral position of the injection needle 73 is relatively stable, and it can penetrate into the injection site relatively accurately without skewing or missing the target.

[0072] To enable the reader to more clearly understand the injection device of the embodiment of the present application, on the basis of the above - preliminary introduction of the structure, the working process and action principle of the injection device of the embodiment of the present application are briefly introduced below. The working process of the injection device mainly includes two stages: needle insertion and injection. The following is an introduction according to this:

[0073] 1) Needle insertion. The user holds the outer shell 20 and presses the needle protection sleeve 80 against the injection site of the target organism. Then, a force is applied to push the outer shell 20 towards the target organism. Since the needle protection sleeve 80 is against the target organism and does not move relative to the target organism, while the injection liquid container 70 can move following the movement of the outer shell 20, the injection needle 73 of the injection liquid container 70 can protrude from the needle protection sleeve 80 and pierce into the target organism. After the injection needle 73 penetrates a certain depth, the needle insertion process is completed.

[0074] 2) Injection. During the needle insertion process, the movement of the outer shell 20 will also drive the same-direction movement of the guide sleeve 30 and the injection rod 10, while the trigger sleeve 40, like the needle protection sleeve, does not move relative to the target organism. Therefore, the injection rod 10 moves relative to the trigger sleeve 40. After the needle insertion process is completed, the injection rod 10 rotates a first preset angle around the first direction under the guidance of the trigger structure 41. So that the first protrusion 11 of the injection rod 10 enters the guide groove 31 of the guide sleeve 30, and then under the elastic force of the injection elastic member 51, the injection rod 10 moves along the direction of the guide groove 31, pushing the piston 71 in the injection liquid container 70 to move, squeezing out the injection liquid for injection. When the injection rod 10 moves to a preset position, such as the piston 71 abuts against the bottom of the injection liquid container 70, or the first protrusion 11 abuts against the bottom of the guide groove 31, etc., the injection rod 10 is blocked and cannot move further, and the injection process is completed. The position change of the first protrusion of the injection rod before and after being triggered is for reference Figures 10 - 13 。

[0075] In the injection device according to the embodiment of the present application, the sound generating mechanism is arranged on the injection rod 10 of the injection action mechanism, or on the piston 71 that is acted upon during injection, so that the emission of the trigger prompt sound is synchronized with the actual injection time.

[0076] In some other embodiments of the present application, the first sound generating member 61 is movably connected to the proximal end of the injection rod 10, for reference Figure 9 。

[0077] Without limitation, during injection, the first sound generating member 61 is driven by the injection rod 10 to abut against the piston 71, and under the extrusion of the piston 71, moves towards the proximal end of the injection rod 10 to impact the proximal end of the injection rod 10. Movably connecting the first sound generating member 61 to the injection rod 10 is easier to implement in terms of structure.

[0078] Since the first sound generating member 61 is movably connected to the injection rod 10, when the injection rod 10 moves towards the piston 71, the first sound generating member 61 contacts the piston 71 and retreats under the extrusion of the piston 71 until it impacts the proximal end of the injection rod 10, emitting a sound indicating the start of injection.

[0079] In some other embodiments of the present application, the movable connection includes: one of the first sound - generating member 61 and the injection rod 10 is provided with a first guiding hole in a first direction, and the other is provided with a first guiding rod that cooperates with the guiding hole, and the first guiding rod and the first guiding hole are in a transition fit.

[0080] Through the cooperation of the guiding hole and the guiding rod, the cooperation between the two is smoother and the processing cost is also low. The guiding hole is a general term for the first guiding hole and the second guiding hole, and the guiding rod is a general term for the first guiding rod and the second guiding rod.

[0081] It should be noted that the transition fit is to prevent the cooperation between the first sound - generating member 61 and the injection rod 10 from being too loose, so that the distal end of the first sound - generating member 61 contacts the proximal end of the injection rod 10 before injection starts, and no impact can occur during injection.

[0082] Specifically, both the first sound - generating member 61 and the injection rod 10 can be made of plastic material, so the surface roughness is relatively large. Through the transition fit, the situation that the cooperation between the first sound - generating member 61 and the injection rod 10 is too loose can be avoided.

[0083] In some other embodiments of the present application, the movable connection includes: one of the first sound - generating member 61 and the injection rod 10 is provided with a second guiding hole in a first direction, and the other is provided with a second guiding rod that cooperates with the second guiding hole; the second guiding rod and the second guiding hole are in a clearance fit, and at least one of the second guiding hole and the second guiding rod is provided with a first preset structure for increasing the sliding resistance to increase the resistance of the relative sliding between the second guiding hole and the second guiding rod.

[0084] It can be understood that since it is a clearance fit, a first preset structure needs to be added to increase the sliding resistance to achieve a similar effect to the above - mentioned transition fit.

[0085] In some other embodiments of the present application, the first preset structure is a bump provided on the inner wall of the second guiding hole or the outer wall of the second guiding rod.

[0086] Through the bump, the sliding resistance can be increased and the manufacturing cost is low. It can be understood that there can be multiple bumps. It can be understood that the first preset structure can also be other structures, such as structures formed by processes such as knurling, wire drawing, sandblasting, etc.

[0087] In some other embodiments of the present application, at least one groove is formed on the end surface of the proximal end of the injection rod 10 to reduce the area of impact with the first sound - generating member 61, refer to Figure 4 .

[0088] In this way, under the same impact force, a sound with a higher frequency can be emitted, for example, a sharper sound that is more easily perceptible to people.

[0089] In some other embodiments of the present application, the housing 20 includes a tube body 21 and an end cap 22 connected to the distal end of the tube body 21; the end cap 22 abuts against the guiding sleeve 30 in the first direction, and during injection, the end cap 22 pushes the guiding sleeve 30 to move in the first direction.

[0090] Manufacturing the housing 20 by separately fabricating the tube body 21 and the end cap 22 and then assembling them is beneficial for reducing manufacturing costs. For example, after separation, the structure is simpler, which can simplify processing.

[0091] It can be understood that the end cap 22 is used to close the distal end of the tube body 21, and the end cap 22 abuts against the guiding sleeve 30 in the first direction. During needle insertion and injection, the movement of the housing 20 in the first direction can drive the movement of the guiding sleeve 30 in the first direction.

[0092] In some other embodiments of the present application, referring to Figure 14 and Figure 15 , the side wall of the tube body 21 includes a first clamping groove 211, and the outer wall of the end cap 22 is provided with a first clamping tongue 221 that cooperates with the first clamping groove 211. Through the first clamping groove 211 and the first clamping tongue 221, the end cap 22 is fixedly connected to the tube body 21.

[0093] Through the cooperation of the first clamping groove 211 and the first clamping tongue 221, the fixation between the tube body 21 and the end cap 22 is relatively firm and not easily loosened under vibration.

[0094] In some other embodiments of the present application, the injection device further includes a needle cover 731 and a tube cap 23; the needle cover 731 is sleeved on the proximal end of the injection liquid container 70 to cover the injection needle 73; the tube cap 23 is sleeved on the proximal end of the housing 20 to close the proximal end of the housing 20; the tube cap 23 and the needle cover 731 are axially linked.

[0095] In this way, in addition to the needle protection sleeve 80 surrounding the injection needle 73 of the injection liquid container 70 circumferentially, the injection needle 73 is also covered by the needle cover 731, making it safer to use.

[0096] The tube cap 23 can protect components such as the needle cover 731 by closing the proximal end of the housing 20.

[0097] The purpose of the axial linkage between the tube cap 23 and the needle cover 731 is that when preparing for injection and removing the tube cap 23, the needle cover 731 can also be removed together, making the operation faster.

[0098] It should be understood that the above embodiments are all exemplary and do not cover all possible implementation manners included in the technical solution of this application. Without departing from the scope disclosed in this application, various deformations and changes can also be made on the basis of the above embodiments. Similarly, the various technical features of the above embodiments can also be arbitrarily combined to form other embodiments of this application that may not be clearly described. Therefore, the above embodiments only represent several implementation manners of this application and do not limit the protection scope of the patent of this application.

Claims

1. An injection device, characterized in that: It includes an injection rod, a housing, a guide sleeve, a trigger sleeve, an injection elastic member and an injection sounding mechanism, wherein: The injection rod is used to perform an injection movement along a first direction during injection, pushing the piston in the injection liquid container to move; The housing includes a proximal end and an opposite distal end; the housing can push the guide sleeve to move in the first direction during injection, so as to push the injection needle of the injection liquid container to penetrate into the target organism; The guide sleeve is used to drive the injection rod to move relative to the trigger sleeve to trigger the injection movement; the guide sleeve is sleeved on the injection rod and is provided with a guide groove for guiding the injection rod to perform the injection movement; The trigger sleeve is sleeved on the guide sleeve and is provided with a trigger structure for guiding the injection rod to rotate around a first direction and a first preset angle during injection, and the trigger structure is an inclined surface or an arc surface; the outer periphery of the injection rod is provided with a first protrusion that cooperates with the trigger structure and passes through the outer wall of the guide sleeve; The injection sound-generating mechanism includes a first sound-generating member, and / or a second sound-generating member; the first sound-generating member is located at or connected to the proximal end of the injection rod, and the second sound-generating member is located at or connected to the distal end of the piston; during injection, the injection sound-generating mechanism emits a sound through one or more of the following: the first sound-generating member hits the proximal end of the injection rod, the first sound-generating member hits the second sound-generating member, and the injection rod hits the second sound-generating member.

2. The injection device according to claim 1, characterized in that The first sounding member is movably connected to the proximal end of the injection rod.

3. The injection device according to claim 2, characterized in that The movable connection includes: one of the first sounding member and the injection rod is provided with a first guide hole in a first direction, and the other is provided with a first guide rod matched with the guide hole, and the first guide rod and the first guide hole are transitionally matched.

4. The injection device according to claim 2, characterized in that The movable connection includes: one of the first sounding member and the injection rod is provided with a second guide hole in a first direction, and the other is provided with a second guide rod matching with the second guide hole; the second guide rod and the second guide hole are clearance-matched, and at least one of the second guide hole and the second guide rod is provided with a first preset structure for increasing sliding resistance, so as to increase the relative sliding resistance between the second guide hole and the second guide rod.

5. The injection device according to claim 4, characterized in that The first preset structure is a protrusion arranged on the inner wall of the second guide hole or the outer wall of the second guide rod.

6. The injection device according to claim 2, characterized in that The end surface of the proximal end of the injection rod is provided with at least one groove to reduce the area of ​​collision with the first sound-generating member.

7. The injection device according to any one of claims 1 to 6, characterized in that: The injection device also includes a needle protection sleeve, which axially abuts against the proximal end of the trigger sleeve; the needle protection sleeve circumferentially surrounds the injection needle of the injection liquid container when no injection is performed, and abuts against the injection site of the target organism during injection, so that the injection liquid container can move relative to the needle protection sleeve in a first direction under the action of the guide sleeve, thereby allowing the injection needle to penetrate the target organism.

8. The injection device according to any one of claims 1 to 6, characterized in that: The shell includes a tube body and an end cap connected to the distal end of the tube body; the end cap abuts against the guide sleeve in a first direction, and during injection, the end cap pushes the guide sleeve to move in the first direction.

9. The injection device according to claim 8, characterized in that The side wall of the tube body comprises a first clamping groove, and the outer wall of the end cover is provided with a first clamping tongue matched with the first clamping groove. The end cover is fixedly connected to the tube body through the first clamping groove and the first clamping tongue.

10. The injection device according to any one of claims 1 to 6, characterized in that: The injection device also includes a needle cover and a tube cap; the needle cover is sleeved on the proximal end of the injection liquid container to cover the needle cover. The injection needle; the tube cap is sleeved on the proximal end of the shell to close the proximal end of the shell; The tube cap and the needle cover are axially linked.

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