An injection pen and its sound-generating device

Abstract

This application discloses an injection pen and its sound-generating device, relating to the field of medical device technology. The injection pen sound-generating device includes a pen body, an injection mechanism, and an adjustment mechanism. A sound-generating area is formed on the inner wall of the pen body. The injection mechanism includes a push rod sleeve with a sound-generating paddle, which is positioned towards the sound-generating area. The sound-generating paddle contacts the sound-generating rib to generate a first type of feedback corresponding to the rotation angle. The adjustment mechanism includes a dosage hub with a sound-generating protrusion, which is positioned towards the sound-generating area. The sound-generating protrusion contacts the sound-generating rib to generate a second type of feedback corresponding to the rotation angle. The above-mentioned injection pen sound-generating device, by setting the sound-generating rib and specific sound-generating paddle and sound-generating protrusion on the pen body, provides clear and easily distinguishable acoustic feedback, effectively solving the problem of unclear acoustic feedback during dosage adjustment and injection in the prior art, and improving the accuracy of operation and user experience.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an injection pen and its sound-generating device. Background Technology

[0002] Injection pens, as convenient drug delivery tools, are widely used in the medical field, especially in the treatment of chronic diseases such as diabetes. They typically consist of a needle, a cartridge, and the pen body, and utilize a dosage adjustment mechanism to allow the operator to set the injection dose as needed. With continuous advancements in medical technology, the design of injection pens is constantly being optimized to improve ease of operation and dosage accuracy. However, existing injection pens still have shortcomings in dosage adjustment and feedback mechanisms during the injection process, particularly in providing clear and accurate auditory feedback.

[0003] While existing injection pens offer a degree of accuracy in dosage adjustment, operators often struggle to obtain clear tactile or auditory feedback during actual use. This can lead to inaccurate dosage settings and compromised treatment outcomes. Furthermore, the sound-emitting devices in existing injection pens are typically internal, resulting in low volume and difficulty in identification, especially in noisy environments or for patients with hearing impairments. Additionally, the audible alerts during injection are often indistinguishable from those used for dosage adjustment, failing to provide operators with intuitive auditory guidance and increasing the risk of errors. Therefore, existing injection pens exhibit significant deficiencies in the accuracy and clarity of their auditory feedback. Summary of the Invention

[0004] The purpose of this application is to provide a sound-emitting device for an injection pen. By setting sound-emitting ribs, specific sound-emitting paddles, and sound-emitting protrusions on the pen body, it provides clear and easily distinguishable acoustic feedback, effectively solving the problem of unclear acoustic feedback during dosage adjustment and injection in existing technologies, and improving the accuracy of operation and user experience. Another purpose of this application is to provide an injection pen.

[0005] To achieve the above objectives, this application provides a sound-generating device for an injection pen, comprising:

[0006] The pen body has multiple sets of sound-emitting ribs on its inner wall, and these multiple sets of sound-emitting ribs are distributed along the inner circumference of the pen body to form a sound-emitting area on the inner wall of the pen body.

[0007] An injection mechanism is provided on the pen body. The injection mechanism includes a push rod sleeve with a sound-emitting paddle. The sound-emitting paddle is disposed toward the sound-emitting area. The sound-emitting paddle is used to contact the sound-emitting rib when the push rod sleeve rotates relative to the pen body to generate a first type of feedback corresponding to the rotation angle.

[0008] An adjustment mechanism is provided on the pen body. The adjustment mechanism includes a dosage hub with a sound-emitting protrusion. The sound-emitting protrusion is disposed toward the sound-emitting area. The sound-emitting protrusion is used to contact the sound-emitting rib when the dosage hub rotates relative to the pen body to generate a second type of feedback corresponding to the rotation angle.

[0009] In some embodiments, the injection mechanism further includes a clutch rotatably disposed inside the pen body. The clutch is used to drive the push rod sleeve to rotate and is axially movable. On the movement path of the clutch, the clutch has two states: abutting and coupling with the dosage hub and disengaging.

[0010] In some embodiments, the proximal end of the dosing hub is provided with a limiting spring arm for abutting against the proximal end of the clutch, and the sound-emitting protrusion is provided on the outside of the limiting spring arm;

[0011] When the clutch abuts and couples with the dosage hub, the limiting spring arm is squeezed by the proximal end of the clutch, and the sound-emitting protrusion rises and disengages from the sound-emitting rib; when the clutch is disengaged from the dosage hub, the sound-emitting protrusion always remains in contact with the sound-emitting rib.

[0012] In some embodiments, multiple sets of the sound-emitting ribs are evenly distributed along the inner circumference of the pen body, and each of the sound-emitting ribs extends along the axial direction of the pen body.

[0013] In some embodiments, along the axial direction of the pen body, the sound-emitting paddle is located closer to the proximal end of the pen body than the sound-emitting protrusion, and the sound-emitting protrusion is located closer to the distal end of the pen body than the sound-emitting paddle.

[0014] In some embodiments, the sound-producing paddles are configured as one or more pairs and are symmetrically distributed circumferentially on the push rod sleeve.

[0015] In some embodiments, the sound-emitting protrusions are configured as one or more pairs and are symmetrically distributed circumferentially on the dose hub.

[0016] This application also provides an injection pen, including the aforementioned injection pen sound-generating device, wherein the injection mechanism includes:

[0017] A push rod, located on the pen body, is used to push the liquid medicine in the cartridge bottle by rotating the push rod sleeve.

[0018] In some embodiments, the injection pen further includes:

[0019] A refill holder, fixedly located near the end of the pen body, the interior of which is used to hold a cartridge bottle; and / or,

[0020] An injection button is rotatably mounted on the clutch, and the injection button is located on the outside of the distal end of the pen body.

[0021] In some embodiments, the injection pen further includes:

[0022] A push rod nut is fixedly installed at the near end of the pen body, and the push rod nut is used for the push rod to pass through;

[0023] Wherein, the pen body has a threaded body inside at its distal end; the dosage hub is threadedly engaged with the threaded body; and / or,

[0024] The pen body has a first window at its far end, which is used to display the dose markings on the outside of the dose wheel.

[0025] Compared to the aforementioned background technology, the injection pen sound-generating device provided in this application mainly includes a pen body, an injection mechanism, and an adjustment mechanism. Multiple sets of sound-generating ribs are provided on the inner wall of the pen body, distributed along the inner circumference of the pen body to form a sound-generating area on the inner wall of the pen body. The injection mechanism is located on the pen body and includes a push rod sleeve with a sound-generating paddle. The sound-generating paddle is positioned towards the sound-generating area and is used to contact the sound-generating ribs when the push rod sleeve rotates relative to the pen body, generating a first type of feedback corresponding to the rotation angle. The adjustment mechanism is located on the pen body and includes a dosage hub with a sound-generating protrusion. The sound-generating protrusion is positioned towards the sound-generating area and is used to contact the sound-generating ribs when the dosage hub rotates relative to the pen body, generating a second type of feedback corresponding to the rotation angle.

[0026] In existing technologies, the dosage adjustment and injection process of injection pens lack clear and accurate auditory feedback, making it difficult for operators to confirm the accuracy of dosage settings by sound. To address this problem, this technical solution proposes a sound-generating device for injection pens. Its innovation lies in creating multiple sets of sound-generating ribs on the inner wall of the pen body, forming a specific sound-generating area. These ribs are evenly distributed along the inner circumference of the pen body, ensuring the uniformity and clarity of the sound. When the injection or adjustment mechanism operates, the sound-generating paddles and protrusions on them contact the sound-generating ribs, producing clear auditory feedback.

[0027] Specifically, the push rod sleeve in the injection mechanism is equipped with sound-emitting paddles. These paddles contact the sound-emitting ribs when the push rod sleeve rotates, producing a first type of feedback sound corresponding to the rotation angle. This sound feedback is not only clear, but also, because the sound-emitting area is located on the pen body wall, the sound transmission is more direct and loud, thus improving the sound's recognizability. Simultaneously, the dosage hub in the adjustment mechanism has sound-emitting protrusions that contact the sound-emitting ribs when the dosage hub rotates, producing a second type of feedback sound. Due to the different designs of the sound-emitting protrusions and paddles, the sound effects they produce when in contact with the sound-emitting ribs also differ. This provides the operator with easily distinguishable sound cues, making the sound signals for dosage adjustment and injection processes clearly differentiated.

[0028] Based on the above structural and process descriptions, it can be seen that the sound-generating device of the injection pen has at least the following beneficial effects: by setting sound-generating ribs, specific sound-generating paddles, and sound-generating protrusions on the body of the injection pen, the sound-generating device provides clear and easily distinguishable acoustic feedback, effectively solving the problem of unclear acoustic feedback during dosage adjustment and injection in the prior art, and improving the accuracy of operation and user experience. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 A schematic diagram of the sound-generating device for an injection pen provided in an embodiment of this application;

[0031] Figure 2 An assembly diagram of the injection pen provided in the embodiments of this application;

[0032] Figure 3 A schematic diagram of the pen body provided for an embodiment of this application;

[0033] Figure 4 A schematic diagram of the pen body and the sound-producing pick provided in the embodiments of this application;

[0034] Figure 5 A schematic diagram of the pen body and the sound-emitting protrusion provided for an embodiment of this application;

[0035] Figure 6 A schematic diagram of the clutch and push rod sleeve provided in the embodiments of this application;

[0036] Figure 7 A schematic diagram of the clutch and dosing hub provided for an embodiment of this application;

[0037] Figure 8 Another schematic diagram of the clutch and dosing hub provided in the embodiments of this application;

[0038] Figure 9 A schematic diagram of the clutch and injection button provided in an embodiment of this application;

[0039] Figure 10 An exploded view of the injection pen provided in the embodiments of this application;

[0040] Figure 11 A cross-sectional view of the injection pen provided in an embodiment of this application;

[0041] Figure 12 A schematic diagram of a pen refill holder provided in an embodiment of this application;

[0042] Figure 13 A schematic diagram of the push rod nut provided in an embodiment of this application;

[0043] Figure 14 A schematic diagram of the push rod and push rod nut provided in the embodiments of this application;

[0044] Figure 15 A schematic diagram of the push rod and push rod latch provided in the embodiments of this application;

[0045] Figure 16 A schematic diagram of the push rod sleeve and push rod nut provided in the embodiments of this application;

[0046] Figure 17 A schematic diagram of the push rod sleeve and push rod provided in the embodiments of this application;

[0047] Figure 18 A schematic diagram of the dose hub provided in an embodiment of this application;

[0048] Figure 19 This is a structural diagram of the limiting nut and clutch provided in an embodiment of this application;

[0049] Figure 20 This is a structural diagram of the limiting nut and dosage hub provided in the embodiments of this application.

[0050] in:

[0051] Injection mechanism 100, adjustment mechanism 200,

[0052] Cartridge bottle 1

[0053] Rubber stopper 2

[0054] 3. Push rod nut, 31. First protrusion, 32. First clamping arm, 33. First internal thread, 34. Second protrusion, 35. Positioning spring, 36. Conical cavity.

[0055] Push rod 4, push rod thread 41, connector 42, moving surface 43

[0056] 5. Push rod sleeve; 51. Sound-generating paddle; 52. Conical flange; 53. Limiting block; 54. Notched flange.

[0057] Pen body 6, first positioning hole 61, sound-emitting rib 62, threaded body 63, first viewing window 64.

[0058] 7. Dosage hub, 71. First external thread, 72. Limiting spring arm, 73. Guide rib, 74. Linkage spline, 75. Limiting groove, 76. Spline knob, 77. Dosage indicator, 78. Limiting window, 79. Sound-emitting protrusion.

[0059] Pen refill holder 8, second positioning hole 81, positioning shoulder 82, clearance groove 83, second viewing window 84, threaded interface 85.

[0060] Push rod latch 9, caliper plate 91, push surface 92

[0061] Limit nut 10, guide groove 101, second internal thread 102

[0062] Clutch 11, Positioning flange 111, Linkage protrusion 112, Second external thread 113, Linkage rib 114, Mounting hook 115

[0063] Injection button 12, button surface 121, mounting step 122. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] It should be noted that in this article, the proximal end refers to the side closest to the needle and injection site, i.e., the tip of the injection pen, while the distal end refers to the side opposite to the proximal end, i.e., the tail end of the injection pen. Therefore, each component has its proximal and distal ends, and the proximal and distal ends of different components follow the same definition rules.

[0067] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the sound-generating device for an injection pen provided in an embodiment of this application.

[0068] like Figure 1 As shown, in the first specific embodiment, the injection pen sound-generating device provided by the present application mainly includes a pen body 6, an injection mechanism 100, and an adjustment mechanism 200.

[0069] Please refer to Figure 2 , Figure 2 This is an assembly diagram of the injection pen provided in an embodiment of this application.

[0070] This application also provides an injection pen, including an injection pen sound-generating device, such as a pen body 6, an injection mechanism 100, and an adjustment mechanism 200. The injection mechanism 100 is used to administer the injection, and the adjustment mechanism 200 is used to adjust the dosage before injection. The injection mechanism 100 includes at least a push rod sleeve 5, and the adjustment mechanism 200 includes at least a dosage hub 7.

[0071] It should be noted that the improvement in this embodiment lies in the sound-generating device of the injection pen. Other aspects besides the sound-generating device of the injection pen are not included in the improvement of this embodiment; for example, other components of the injection mechanism 100 and the adjustment mechanism 200, and the working principle of the injection mechanism 100 and the adjustment mechanism 200 are not within the scope of this embodiment.

[0072] The improvements in this embodiment will be described below.

[0073] Please continue to refer to this. Figure 1 and Figure 2 And refer to Figures 3 to 5 ,in, Figure 3 This is a schematic diagram of the pen body provided in an embodiment of this application. Figure 4 This is a schematic diagram of the pen body and the sound-producing pick provided in an embodiment of this application. Figure 5 A schematic diagram of the pen body and the sound-emitting protrusion provided in an embodiment of this application.

[0074] like Figures 3 to 5 As shown, the inner wall of the pen body 6 is provided with multiple sets of sound-emitting ribs 62, which are distributed along the inner circumference of the pen body 6 to form a sound-emitting area on the inner wall of the pen body 6.

[0075] The injection mechanism 100 is located on the pen body 6. The injection mechanism 100 includes a push rod sleeve 5 with a sound-emitting paddle 51, such as... Figure 4 As shown, the sound-emitting paddle 51 is positioned towards the sound-emitting area. The sound-emitting paddle 51 is used to contact the sound-emitting rib 62 when the push rod sleeve 5 rotates relative to the pen body 6, generating a first type of feedback corresponding to the rotation angle. Optionally, the contact between the sound-emitting paddle 51 and the sound-emitting rib 62 is sequential, and the feedback sound has a clear segmented feel.

[0076] The adjustment mechanism 200 is located on the pen body 6. The adjustment mechanism 200 includes a dose hub 7 with a sound-emitting protrusion 79, such as... Figure 5 As shown, the sound-emitting protrusion 79 is positioned towards the sound-emitting area. The sound-emitting protrusion 79 is used to contact the sound-emitting rib 62 when the dosage hub 7 rotates relative to the pen body 6, generating a second type of feedback corresponding to the rotation angle. Optionally, the sound-emitting protrusion 79 contacts the sound-emitting rib 62 one by one, and the feedback sound has a clear segmentation.

[0077] In existing technologies, the dosage adjustment and injection process of injection pens lack clear and accurate auditory feedback, making it difficult for operators to confirm the accuracy of dosage settings by sound. To address this technical problem, this technical solution proposes a sound-generating device for injection pens. Its innovation lies in forming specific sound-generating areas by setting multiple sets of sound-generating ribs 62 on the inner wall of the pen body 6. These sound-generating ribs 62 are evenly distributed along the inner circumference of the pen body 6, ensuring the uniformity and clarity of the sound. When the injection mechanism 100 or the adjustment mechanism 200 operates, the sound-generating paddle 51 and the sound-generating protrusion 79 on them contact the sound-generating ribs 62, producing clear auditory feedback.

[0078] Specifically, the pusher sleeve 5 in the injection mechanism 100 is equipped with sound-emitting paddles 51. These paddles 51 contact the sound-emitting ribs 62 when the pusher sleeve 5 rotates, producing a first type of feedback sound corresponding to the rotation angle. This sound feedback is not only clear, but also, because the sound-emitting area is located on the wall of the pen body 6, the sound transmission is more direct and loud, thereby improving the sound's recognizability. Simultaneously, the dosage hub 7 in the adjustment mechanism 200 is equipped with sound-emitting protrusions 79, which contact the sound-emitting ribs 62 when the dosage hub 7 rotates, producing a second type of feedback sound. Due to the different designs of the sound-emitting protrusions 79 and the sound-emitting paddles 51, the sound effects they produce when in contact with the sound-emitting ribs 62 are also different. This provides the operator with easily distinguishable sound cues, making the sound signals for dosage adjustment and injection processes clearly distinguishable.

[0079] Based on the above structural and process descriptions, it can be seen that the sound-generating device of the injection pen has at least the following beneficial effects: by setting a sound-generating rib 62, a specific sound-generating paddle 51, and a sound-generating protrusion 79 on the pen body 6 of the injection pen, the sound-generating device provides clear and easily distinguishable acoustic feedback, effectively solving the problem of unclear acoustic feedback during dosage adjustment and injection in the prior art, and improving the accuracy of operation and user experience.

[0080] Please refer to Figure 6 , Figure 6 A schematic diagram of the clutch and push rod sleeve provided in an embodiment of this application.

[0081] In some embodiments, the injection mechanism 100 further includes a clutch 11, which is rotatably disposed inside the pen body 6. The clutch 11 is used to drive the push rod sleeve 5 to rotate. The clutch 11 is axially movable. On the movement path of the clutch 11, the clutch 11 has two states: abutting and coupling with the dosage hub 7 and disengaging.

[0082] In this embodiment, when the clutch 11 is decoupled from the dosage hub 7, the dosage hub 7 can rotate independently of the push rod sleeve 5. At this time, the operator can freely adjust the dosage without the clutch 11 engaging, ensuring the independence and accuracy of dosage adjustment. In this state, the sound-emitting protrusion 79 on the dosage hub 7 can contact the sound-emitting rib 62 on the inner wall of the pen body 6, generating feedback sound corresponding to the rotation angle, helping the operator perceive the dosage setting through hearing.

[0083] When the clutch 11 is coupled to the dosage hub 7, the rotation of the clutch 11 will be transmitted to the push rod sleeve 5, causing the push rod sleeve 5 and the dosage hub 7 to rotate synchronously. At this time, the sound-emitting paddle 51 on the push rod sleeve 5 will contact the sound-emitting rib 62, generating a feedback sound corresponding to the rotation angle, helping the operator to perceive the dosage through hearing.

[0084] Please continue to refer to this. Figures 3 to 5 In some embodiments, multiple sets of sound-emitting ribs 62 are evenly distributed along the inner circumference of the pen body 6, and each sound-emitting rib 62 extends along the axial direction of the pen body 6.

[0085] In this embodiment, the sound-emitting ribs 62 are designed with circumferential distribution and axial extension. Circumferential distribution means that the sound-emitting ribs 62 are evenly arranged along the circumference of the pen body 6. This ensures that regardless of the position of the push rod sleeve 5 or the dosage hub 7, the sound-emitting paddle 51 and the sound-emitting protrusion 79 can contact the sound-emitting ribs 62, producing a clear and uniform audible prompt. This design provides consistent sound feedback, helping the operator to determine their operating position by sound when adjusting the dosage or performing injections, thus improving the accuracy and reliability of the operation.

[0086] The axial extension design means that each sound-emitting rib 62 is not only distributed circumferentially but also extends along the length of the pen body 6. This design increases the area of ​​the sound-emitting region, ensuring that the sound-emitting paddle 51 and the sound-emitting protrusion 79 can contact the sound-emitting rib 62 throughout their entire range of motion. Feedback sound is generated regardless of the axial position of the push rod sleeve 5 or the dosage hub 7, providing continuous audible cues to the operator throughout the operation. This design not only improves the coverage of audible feedback but also enhances the interactive experience of the injection pen, making operation more intuitive and easier to control.

[0087] Please continue to refer to this. Figure 4 In some embodiments, along the axial direction of the pen body 6, the sound-emitting paddle 51 is located closer to the proximal end of the pen body 6 than the sound-emitting protrusion 79, and the sound-emitting protrusion 79 is located closer to the distal end of the pen body 6 than the sound-emitting paddle 51.

[0088] In this embodiment, the sound-emitting paddle 51 and the sound-emitting protrusion 79 are located at the proximal and distal ends of the pen body 6, respectively. This arrangement creates two distinct acoustic feedback points. The sound-emitting paddle 51 is located near the proximal end of the pen body 6. When the push rod sleeve 5 rotates and causes the sound-emitting paddle 51 to contact the sound-emitting rib 62, acoustic feedback is generated at the proximal end of the pen body 6. This acoustic feedback provides the operator with an immediate auditory signal indicating that an injection operation is currently underway. Because the proximal end of the pen body 6 is closer to the injection site, the acoustic feedback at the proximal end is directionally consistent with the injection operation.

[0089] Conversely, the sound-emitting protrusion 79 is positioned on the dosage hub 7, which is located at the distal end of the pen body 6. When the dosage hub 7 is rotated to adjust the dosage, the sound-emitting protrusion 79 contacts the sound-emitting rib 62, generating another type of sound feedback at the distal end of the pen body 6. This distal sound feedback provides the operator with a confirmation signal for dosage adjustment. Because the distal end of the pen body 6 is closer to the dosage adjustment position, the distal sound feedback is directionally consistent with the dosage adjustment operation.

[0090] Through this differentiated acoustic feedback design, the operator can quickly distinguish the current stage of the operation by the location of the sound source. The sound at the proximal end indicates that injection is in progress, while the sound at the distal end indicates that the dosage is being adjusted. This differentiation not only improves the accuracy of the operator in identifying the operation stage but also reduces the possibility of misoperation, thereby enhancing the safety of the injection pen and the user experience. In this embodiment, the sound-emitting paddles 51 can be configured as one or more pairs symmetrically distributed. The sound-emitting paddles 51 at the proximal end abut against the axially extending sound-emitting ribs 62 distributed circumferentially inside the pen body 6, so that they can indirectly contact the pen body 6 to emit sound when the push rod sleeve 5 rotates. In addition, the contact relationship between the sound-emitting paddles 51 at the proximal end and the sound-emitting ribs 62 can also provide basic resistance, preventing the push rod sleeve 5 from rotating without receiving rotational force, thereby improving the accuracy of the push rod sleeve 5 initiation.

[0091] Please continue to refer to this. Figure 5 In some embodiments, the sound-emitting protrusions 79 are configured as one or more pairs and are symmetrically distributed in the circumferential direction of the dose hub 7.

[0092] In this embodiment, the sound-emitting protrusions 79 can also be configured as one or more pairs and symmetrically distributed, abutting against the sound-emitting ribs 62 that extend axially in the circumferential distribution inside the pen body 6, so that when the dose hub 7 rotates, it can indirectly contact the pen body 6 to emit sound.

[0093] Please refer to Figure 7 , Figure 7 This is a schematic diagram of the clutch and dose hub provided in an embodiment of this application.

[0094] In some embodiments, the proximal end of the dosing hub 7 is provided with a limiting spring arm 72 for abutting against the proximal end of the clutch 11, and the sound-emitting protrusion 79 is provided on the outer side of the limiting spring arm 72.

[0095] When the clutch 11 abuts and couples with the dose hub 7, the limiting spring arm 72 is squeezed by the proximal end of the clutch 11, and the sound-emitting protrusion 79 is raised and disengaged from the sound-emitting rib position 62; when the clutch 11 is disengaged from the dose hub 7, the sound-emitting protrusion 79 always remains in contact with the sound-emitting rib position 62.

[0096] In this embodiment, the limiting spring arm 72 is an elastic structure. The limiting spring arm 72 can be regarded as a seesaw. The part of the limiting spring arm 72 that abuts against the clutch 11 is located at one end of the seesaw, and the part of the limiting spring arm 72 that is connected to the sound-generating protrusion 79 is located at the other end of the seesaw.

[0097] During the dosage setting stage, the clutch 11 does not move towards the proximal end, and the clutch 11 is decoupled from the dosage hub 7. At this time, the limit arm 72 is not squeezed by the clutch 11, and the sound-emitting protrusion 79 always remains in contact with the sound-emitting rib 62. As the dosage hub 7 rotates during the dosage setting stage, the sound-emitting protrusion 79 and the sound-emitting rib 62 generate feedback.

[0098] During the injection phase, the clutch 11 moves towards the proximal end and couples with the dosage hub 7. At this time, the limiting spring arm 72 is squeezed by the clutch 11, and the limiting spring arm 72 tilts up and causes the sound-emitting protrusion 79 to disengage from the sound-emitting rib 62. Therefore, the sound-emitting protrusion 79 does not generate feedback during the injection phase. The feedback during the injection phase is generated by the sound-emitting paddle 51.

[0099] Therefore, this scheme achieves feedback from different components at different stages. During the dosage setting stage, the feedback component is the dosage hub 7, while during the injection stage, the feedback component is the push rod sleeve 5. This avoids feedback interference from different components at different stages, resulting in more accurate and effective feedback.

[0100] Furthermore, due to the elastic effect of the limiting spring arm 72, before the limiting spring arm 72 undergoes sufficiently large deformation due to the movement of the clutch 11 toward the proximal end, there is a gap between the linkage spline 74 at the distal end of the dosage drum 7 and the linkage protrusion 112 at the distal end of the clutch 11. This is equivalent to the limiting spring arm 72 supporting the clutch 11, causing the linkage spline 74 to separate from the linkage protrusion 112. At this time, the dosage drum 7 and the clutch 11 move independently. When the limiting spring arm 72 undergoes sufficiently large deformation due to the movement of the clutch 11 toward the proximal end, the linkage spline 74 at the distal end of the dosage drum 7 engages with the linkage protrusion 112 at the distal end of the clutch 11. At this time, the dosage drum 7 and the clutch 11 move together.

[0101] Please continue to refer to this. Figure 7 And refer to Figure 8 and Figure 9 , Figure 8 This is another schematic diagram of the clutch and dosing hub provided in the embodiments of this application. Figure 9 This is a schematic diagram of the clutch and injection button provided in an embodiment of this application.

[0102] In some cases, the dose hub 7 is equipped with a clutch 11 inside, and the far end of the push rod sleeve 5 is provided with a notched flange 54. The notched flange 54 is used for the linkage rib 114 inside the clutch 11 to be inserted, so as to realize the axial movement of the clutch 11 and the rotation of the push rod sleeve 5 driven by the clutch 11.

[0103] The number of linkage ribs 114 can be selected as four. The four linkage ribs 114 on the inner side of the clutch 11 are connected to the notch flange 54 at the far end of the push rod sleeve 5. The linkage ribs 114 are embedded in the notch on the notch flange 54 to restrict the push rod sleeve 5 from rotating synchronously with the clutch 11 and to make axial displacement within the clutch 11.

[0104] Furthermore, in the configuration of a clutch 11 inside the dose hub 7, the distal end of the clutch 11 is provided with a positioning flange 111, the proximal end of the dose hub 7 is provided with a limiting spring arm 72, and the distal end of the dose hub 7 is provided with a limiting groove 75. The positioning flange 111 abuts against the limiting groove 75, and the proximal end of the clutch 11 abuts against the limiting spring arm 72, so as to restrict the clutch 11 inside the dose hub 7, and the clutch 11 is located in a position relatively biased towards the distal end in the dose hub 7.

[0105] Furthermore, in the coupling and decoupling arrangement of the dose hub 7 and the clutch 11, the distal end of the clutch 11 is provided with a linkage protrusion 112, and the distal end of the dose hub 7 is provided with a linkage spline 74. The linkage spline 74 is used to engage with the linkage protrusion 112 and achieve synchronous movement when the clutch 11 moves toward the proximal end.

[0106] Please continue to refer to this. Figure 2 And refer to Figure 10 and Figure 11 , Figure 10 This is an exploded view of the injection pen provided in the embodiments of this application. Figure 11 This is a cross-sectional view of the injection pen provided in an embodiment of this application.

[0107] This application also provides an injection pen, including the aforementioned injection pen sound-emitting device, wherein the injection mechanism 100 includes:

[0108] Push rod 4 is located on pen body 6. Push rod 4 is used to push the medicine liquid in cartridge bottle 1 under the rotation drive of push rod sleeve 5.

[0109] The injection pen should have all the beneficial effects of the aforementioned injection pen sound-emitting device; in short, the injection pen provides clear and accurate feedback during use through the contact of different components with the sound-emitting rib 62 at different stages, thereby improving the accuracy of the dosage and the user experience.

[0110] Alternatively, the sound-emitting rib 62 may adopt a diamond-shaped rib structure.

[0111] Please refer to Figure 12 , Figure 12 This is a schematic diagram of a pen refill holder provided in an embodiment of this application.

[0112] In some embodiments, the injection pen further includes:

[0113] The pen refill holder 8 is fixedly located near the end of the pen body 6, and the interior of the pen refill holder 8 is used to install the cartridge bottle 1.

[0114] In this embodiment, the pen cartridge holder 8 is designed with a space inside for installing the cartridge 1, ensuring that the cartridge 1 can be stably installed in the injection pen and that the liquid can be smoothly ejected from the cartridge 1.

[0115] Optionally, the pen refill holder 8 has a threaded interface 85 at its proximal end for mounting disposable needles. The pen refill holder 8 is hollow inside and open at its distal end for mounting cartridge bottles 1. The pen refill holder 8 has an axially extending second viewing window 84 to facilitate the operator's observation of the use of the cartridge bottle 1, such as the position of the rubber stopper 2 inside the cartridge bottle 1. The distal end of the pen refill holder 8 has a second positioning hole 81, a positioning shoulder 82, and a clearance groove 83. The pen refill holder 8 is connected to the pen refill holder 8 through the second positioning hole 81, the positioning shoulder 82 is axially positioned with the pen body 6, and the clearance groove 83 is located circumferentially between adjacent second positioning holes 81.

[0116] In some embodiments, the injection pen further includes:

[0117] The injection button 12 is rotatably mounted on the clutch 11, and the injection button 12 is located on the outside of the far end of the pen body 6.

[0118] Optionally, the injection button 12 has a mounting step 122 at its proximal end and a button surface 121 at its distal end to provide better tactile feedback when pressed by the operator. The clutch 11 has a mounting hook 115 at its distal end, which is used to engage the mounting step 122 at the proximal end of the injection button 12 to fix the relative axial position of the injection button 12 and the clutch 11, while allowing the two parts to rotate.

[0119] The following is an explanation of the injection pen in conjunction with the injection button 12.

[0120] When the operator rotates the dosage hub 7 to adjust the dosage (with the injection button 12 not pressed proximally), the sound-emitting tab 51 at the proximal end of the push rod sleeve 5 abuts against the circumferentially distributed and axially extending sound-emitting ribs 62 inside the pen body 6, thereby restricting the rotation of the push rod sleeve 5. When the dosage hub 7 is rotated, the outer sound-emitting protrusion 79 of its proximal limiting spring arm 72 will intermittently contact the sound-emitting ribs 62 inside the pen body 6 to produce the feel and sound when adjusting the dosage.

[0121] When the operator presses the injection button 12, the clutch 11 moves towards the proximal end of the relative axial position in the dose hub 7. At this time, the linkage protrusion 112 at the distal end of the clutch 11 engages with the linkage spline 74 inside the distal end of the dose hub 7, forcing the clutch 11 to rotate synchronously with the dose hub 7. The limiting spring arm 72 on the inner side of the proximal end of the dose hub 7 deforms inward, so that the rotation of the dose hub 7 does not cooperate with the pen body 6 and produce a sound. As the clutch 11 rotates, it drives the push rod sleeve 5 to rotate synchronously. Therefore, the push rod 4 rotates with the push rod sleeve 5 and dispenses the required dose. The sound-emitting paddle 51 at the proximal end of the push rod sleeve 5 cooperates with the circumferentially distributed and axially extended sound-emitting ribs 62 inside the pen body 6 to produce intermittent contact, so as to produce a feel and sound when injecting the dose.

[0122] Please refer to Figure 13 , Figure 13 This is a schematic diagram of the push rod nut provided in an embodiment of this application.

[0123] In some embodiments, the injection pen further includes:

[0124] The push rod nut 3 is fixedly installed at the near end of the pen body 6, and the push rod nut 3 is used for the push rod 4 to pass through.

[0125] In this embodiment, the presence of the push rod nut 3 ensures the stable positioning and smooth movement of the push rod 4. In some cases, the push rod nut 3 and the push rod 4 also have a cooperative relationship; as the push rod 4 rotates, the push rod nut 3 can convert the rotation of the push rod 4 into displacement, thereby realizing the injection of the liquid medicine under the movement of the push rod 4. In use, after the push rod 4 passes through the push rod nut 3, it pushes the rubber stopper 2 at the distal end of the cartridge bottle 1 to expel the medicine.

[0126] In some cases, the distal end of the push rod nut 3 is provided with a first protrusion 31, which is used to engage with the first positioning hole 61 at the proximal end of the pen body 6.

[0127] Optionally, the distal end of the push rod nut 3 is provided with four first protrusions 31 symmetrically distributed in the circumferential direction, which engage with the four first positioning holes 61 at the proximal end of the pen body 6 to fix the push rod nut 3 in the axial and radial positions of the pen body 6.

[0128] Please refer to Figure 14 , Figure 14 This is a schematic diagram of the push rod and push rod nut provided in an embodiment of this application.

[0129] In some cases, the push rod nut 3 is provided with a first internal thread 33, and the push rod 4 is provided with a push rod thread 41 on the outside. The push rod thread 41 engages with the first internal thread 33 to realize the axial displacement when the push rod 4 passes through and rotates relative to the push rod nut 3.

[0130] In some cases, the near end of the push rod nut 3 is provided with a second protrusion 34, which is used to engage with the second positioning hole 81 at the far end of the pen refill holder 8.

[0131] Optionally, the near end of the push rod nut 3 is provided with two second protrusions 34 symmetrically distributed in the circumferential direction. The second protrusions 34 are engaged with the second positioning hole 81 at the far end of the pen refill holder 8 to achieve axial and radial fixation of the push rod nut 3 and the pen refill holder 8.

[0132] In some cases, the near end of the push rod nut 3 is provided with a positioning spring 35, which is used to position the axial position of the cartridge bottle 1 and provide cushioning for the cartridge bottle 1. The positioning spring 35 is used to hold one end of the cartridge bottle 1 in axial position, and the positioning spring 35 also serves to protect the cartridge bottle.

[0133] Please refer to Figure 15 , Figure 15 This is a schematic diagram of the push rod and push rod buckle provided in the embodiments of this application.

[0134] In some cases, the proximal end of the push rod latch 9 is provided with a pushing surface 92, and the distal end of the push rod latch 9 is provided with a clamp plate 91. The clamp plate 91 engages with the connector 42 at the proximal end of the push rod 4 to fix the push rod latch 9 in the axial position at the proximal end of the push rod 4. In use, the pushing surface 92 at the proximal end of the push rod latch 9 is close to the rubber stopper 2 of the cartridge bottle 1, serving as the contact surface for the injection pen to push the rubber stopper 2.

[0135] Please refer to Figure 16 , Figure 16 This is a schematic diagram of the push rod sleeve and push rod nut provided in the embodiments of this application.

[0136] Furthermore, in the rotatable arrangement of the push rod sleeve 5 relative to the pen body 6, the near end of the push rod sleeve 5 is provided with a tapered flange 52, the far end of the push rod nut 3 is provided with a tapered cavity 36 and a pair of first clamping arms 32, the tapered surface of the near end of the tapered flange 52 is embedded in the tapered cavity 36, and the main body of the far end of the tapered flange 52 is clamped by a pair of first clamping arms 32.

[0137] The conical cavity 36 has an inclined cross-section and accommodates the near end of the conical flange 52. A pair of first clamping arms 32 hold the far end of the conical flange 52, thereby fixing the push rod sleeve 5 in the axial position of the push rod nut 3. The push rod sleeve 5 is rotatable.

[0138] Please refer to Figure 17 , Figure 17 This is a schematic diagram of the push rod sleeve and push rod provided in the embodiments of this application.

[0139] Furthermore, in the configuration where the push rod 4 passes through the push rod sleeve 5 and can drive the push rod 4 to rotate, a limiting block 53 is provided inside the push rod sleeve 5. The push rod 4 includes a push rod 4 with a moving facet 43. The push rod 4 passes through the inside of the push rod sleeve 5, and the moving facet 43 cooperates with the limiting block 53 to realize the axial movement of the push rod 4 and the rotation of the push rod 4 driven by the push rod sleeve 5.

[0140] The motion surface 43 is cut in a direction perpendicular to the axial direction and is radially shaped to match the limiting block 53 inside the push rod sleeve 5. This is used to control the push rod 4 to always rotate synchronously with the push rod sleeve 5 and to move freely axially within the push rod sleeve 5.

[0141] Please refer to Figure 18 , Figure 18 This is a schematic diagram of the dose hub provided in an embodiment of this application.

[0142] In some embodiments, the push rod nut 3 is fixedly disposed at the near end of the pen body 6, and the interior of the far end of the pen body 6 is provided with a threaded body 63; the dosage hub 7 is threadedly engaged with the threaded body 63.

[0143] In this embodiment, the push rod nut 3 is fixed to the proximal end of the pen body 6. This layout provides stable support for the internal components at the proximal end, while the threaded body 63 of the pen body 6 provides stable support for the internal components at the distal end. This design that combines the proximal and distal ends makes the structure of the entire injection pen more balanced and the operation more precise, which helps to improve the functionality and user experience of the injection pen.

[0144] Alternatively, the threaded body 63 can be configured as two segments. The outer side of the dose hub 7 is provided with a first external thread 71 for connecting with the threaded body 63 on the inner side of the pen body 6. The first external thread 71 engages with the two segments of the threaded body 63 at the far end of the inner side of the pen body 6, ensuring that the dose hub 7 can only move and rotate synchronously in the pen body 6 with a specific axial movement according to the thread pitch.

[0145] In some cases, a splined knob 76 is located at the distal end of the dosage hub 7, surrounding the proximal end of the injection button 12. The splined knob 76 can be radially splined or toothed, facilitating operator adjustment by rotating this knob-like portion to set the desired dosage. The proximal portion of the injection button 12 is partially obscured in the radial region by the interior space of the splined knob 76, enhancing the spatial cohesion and overall unity of the two.

[0146] A dosage mark 77 is provided on the outer side of the dosage hub 7, and a first viewing window 64 is provided at the distal end of the pen body 6. The first viewing window 64 is used to display the dosage mark 77. The dosage mark 77 can be multiple printed numbers. The dosage mark 77 of the dosage hub 7 is displayed through the first viewing window 64 at the distal end, which makes it easy for the operator to identify the current usage status of the injection pen.

[0147] In some cases, a stop block is provided at the proximal end of the dose hub 7, which is used to abut against the threaded body 63 to limit the maximum axial movement distance caused by the rotation of the dose hub 7.

[0148] Optionally, a limiting window 78 is provided at the proximal end of the dose hub 7, which can act as a stop block to achieve rotational cutoff. When the dose hub 7 rotates and moves relative to the pen body 6, one of the two threaded sections 63 at the distal end of the inner side of the pen body 6, at the proximal position, will abut against the limiting window 78 at the proximal end of the dose hub 7, thereby limiting the maximum axial displacement of the dose hub 7 within the pen body 6.

[0149] Please refer to Figure 19 and Figure 20 , Figure 19 This is a structural diagram of the limiting nut and clutch provided in an embodiment of this application. Figure 20 This is a structural diagram of the limiting nut and dosage hub provided in the embodiments of this application.

[0150] In some cases, the injection pen also includes a limiting nut 10, which is fitted onto the clutch 11 and nested inside the dosing hub 7.

[0151] Specifically, the outer side of the limiting nut 10 is provided with a guide groove 101, which is used for the guide rib 73 on the inner side of the dose hub 7 to be inserted to realize the axial movement of the limiting nut 10. The inner side of the limiting nut 10 is provided with a second internal thread 102, which is used to connect with the second external thread 113 on the outer side of the clutch 11.

[0152] Optionally, guide ribs 73 extend axially inside the dose hub 7. The symmetrical guide ribs 73 engage with the symmetrical guide grooves 101 on the outer side of the limiting nut 10, thus restricting the limiting nut 10 to rotate synchronously with the dose hub 7 and to move axially along the guide ribs 73. The second internal thread 102 on the inner side of the limiting nut 10 engages with the second external thread 113 of the clutch 11, thereby controlling the limiting nut 10 to always perform specific axial displacement and rotation according to the second external thread 113 of the clutch 11.

[0153] In one specific embodiment, the injection pen provided in this application is a pen-type syringe, with the proximal end being the injection end connected to a drug cartridge such as a cartridge bottle 1, and the distal end being the adjustment end for adjusting the injection dose; the first viewing window 64 contains a dose indicator 77, and the distal end is also equipped with a spline knob 76, which can drive the dose hub 7 to rotate and axially displace when the spline knob 76 is rotated; the distal end is also equipped with an injection button 12, which can push the dose hub 7 to move towards the injection end when the injection button 12 is pressed.

[0154] The cartridge vial 1 applicable to this application is basically consistent with the specifications of common cartridge vial products. The parts used in the injection pen can be made of various plastics (ABS, POM, nylon, etc.) and can have different specifications and structures. During use, the injection needle, cartridge vial 1, and injection pen work together to prepare the medication or inject the drug. During use, the injection pen dispenses the medication through a stainless steel needle, and the intended dosage is distributed through dosage adjustment of the injection pen.

[0155] In one specific embodiment, the injection pen provided in this application is a pre-filled drug injection pen with adjustable dosage and multiple uses, including an injection button 12, a clutch 11, a dosage hub 7, a push rod sleeve 5, a limit nut 10, a push rod 4, a push rod buckle 9, a pen body 6, a push rod nut 3, and a pen refill holder 8. Injection can be performed by rotating the dosage hub 7 and pressing the injection button 12.

[0156] During dosage setting and calibration, clutch 11 moves axially together with dosage hub 7, but clutch 11 does not rotate; simultaneously, push rod sleeve 5 has no rotational kinetic energy, so push rod 4 does not move axially or rotate. During injection, clutch 11 moves axially and rotates together with dosage hub 7, simultaneously driving push rod sleeve 5, which in turn drives push rod 4 to generate rotational kinetic energy, causing push rod 4 to move axially through push rod nut 3 to expel the medication.

[0157] Specifically, during use, the operator rotates the dosage hub 7 until the desired dosage is visible in the window 64. Once the desired dosage is set, the operator presses the injection button 12 until the set dosage is fully injected. When the dosage indicator 77 on the dosage hub 7 displays 0 in the window 64 on the pen body 6, it serves as confirmation that the injection is complete.

[0158] When the operator rotates the dose hub 7 distally to adjust the maximum dose, the limiting window 78 at the proximal end of the dose hub 7 reaches the threaded body 63 at the distal end inside the pen body 6. The proximal side prevents the dose hub 7 from continuing to move distally, thereby limiting the operator from further increasing the dose.

[0159] When the clutch 11 does not rotate synchronously with the dose wheel 7 (dose adjustment), the limiting nut 10, which is threaded to the clutch 11, moves axially with the dose wheel 7, resulting in a corresponding axial displacement towards the distal or proximal end. The amount of displacement is determined by the thread pitch on the clutch 11. When the limiting nut 10 rotates to its furthest point, reaching the end of the thread on the clutch 11, it restricts further rotation of the dose wheel 7, preventing the user from rotating it further to increase the dose adjustment. During injection, because the clutch 11 rotates synchronously with the dose wheel 7, the limiting nut 10 remains in the axial position on the clutch 11 before injection.

[0160] It should be noted that many of the components mentioned in this application are general standard parts or components known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0161] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0162] The injection pen and its sound-generating device provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A sound-generating device for an injection pen, characterized in that, include: The pen body has multiple sets of sound-emitting ribs on its inner wall, and these multiple sets of sound-emitting ribs are distributed along the inner circumference of the pen body to form a sound-emitting area on the inner wall of the pen body. An injection mechanism is provided on the pen body. The injection mechanism includes a push rod sleeve with a sound-emitting paddle. The sound-emitting paddle is disposed toward the sound-emitting area. The sound-emitting paddle is used to contact the sound-emitting rib when the push rod sleeve rotates relative to the pen body to generate a first type of feedback corresponding to the rotation angle. An adjustment mechanism is provided on the pen body. The adjustment mechanism includes a dosage hub with a sound-emitting protrusion. The sound-emitting protrusion is disposed toward the sound-emitting area. The sound-emitting protrusion is used to contact the sound-emitting rib when the dosage hub rotates relative to the pen body to generate a second type of feedback corresponding to the rotation angle. The near end of the dose hub is provided with a limiting spring arm, and the sound-emitting protrusion is provided on the outside of the limiting spring arm.

2. The sound-generating device for an injection pen according to claim 1, characterized in that, The injection mechanism also includes a clutch, which is rotatably disposed inside the pen body. The clutch is used to drive the push rod sleeve to rotate and is axially movable. On the movement path of the clutch, the clutch has two states: abutting and coupling with the dosage hub and disengaging.

3. The sound-generating device for an injection pen according to claim 2, characterized in that, The limiting spring arm abuts against the proximal end of the clutch; When the clutch abuts and couples with the dosage hub, the limiting spring arm is squeezed by the proximal end of the clutch, and the sound-emitting protrusion rises and disengages from the sound-emitting rib; when the clutch is disengaged from the dosage hub, the sound-emitting protrusion always remains in contact with the sound-emitting rib.

4. The sound-generating device for an injection pen according to claim 1, characterized in that, Multiple sets of the sound-emitting ribs are evenly distributed along the inner circumference of the pen body, and each of the sound-emitting ribs extends along the axial direction of the pen body.

5. The sound-generating device for an injection pen according to claim 1, characterized in that, Along the axial direction of the pen body, the sound-producing paddle is located closer to the proximal end of the pen body than the sound-producing protrusion.

6. The sound-generating device for an injection pen according to claim 1, characterized in that, The sound-producing paddles are configured as one or more pairs and are symmetrically distributed circumferentially on the push rod sleeve.

7. The sound-generating device for an injection pen according to claim 1, characterized in that, The sound-emitting protrusions are configured as one or more pairs and are symmetrically distributed circumferentially on the dose hub.

8. An injection pen, characterized in that, Including the sound-generating device for the injection pen as described in any one of claims 1 to 7, the injection mechanism includes: A push rod, located on the pen body, is used to push the liquid medicine in the cartridge bottle by rotating the push rod sleeve.

9. The injection pen according to claim 8, characterized in that, Also includes: A refill holder, fixedly located near the end of the pen body, the interior of which is used to hold a cartridge bottle; and / or, An injection button is rotatably mounted on the clutch, and the injection button is located on the outside of the distal end of the pen body.

10. The injection pen according to claim 8, characterized in that, Also includes: A push rod nut is fixedly installed at the near end of the pen body, and the push rod nut is used for the push rod to pass through; Wherein, the pen body has a threaded body inside at its distal end; the dosage hub is threadedly engaged with the threaded body; and / or, The pen body has a first viewing window at its far end, which is used to display the dose markings on the outside of the dose wheel.

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