An unlock prompt assembly and injection device

Abstract

The utility model discloses an unlocking prompt assembly and injection device, wherein the unlocking prompt assembly comprises a trigger key, a shell and a knob; the trigger key is accommodated in the shell and has an abutting state and a separation state with the knob; the knob is partially accommodated in the shell, is clamped with the shell and can rotate relatively, and the outer wall of the knob is provided with a first matching part; the shell is provided with an accommodation space, the shell is provided with a locking mark and an unlocking mark, the second matching part is arranged on the inner wall of the shell and corresponds to the locking mark and the unlocking mark, the knob is in interference fit with the shell through the first matching part or the second matching part, the knob is deformed radially, and the first matching part can rotate between the locking mark and the unlocking mark. The unlocking prompt assembly and the injection device have the advantages of simple structure, reduced number of parts and components, simplified assembly process, locked trigger device, prevented mis-triggering, produced sound feedback and visual feedback simultaneously during use, improved operation convenience, and provided better safety protection.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an unlocking prompt component and an injection device. Background Technology

[0002] With the development of injection device technology, injection devices have been widely used in the medical field. Currently, commonly used pre-filled syringe (PFS) devices provide a fixed dose, requiring no dose adjustment, and are disposable products that are discarded after a single injection. Simple operation is required during injection, and the pen emits an audible signal to indicate that the injection is in progress. While several injection pen products on the market offer automatic needle insertion, administration, and removal functions, they still suffer from defects such as unreliable component connections, complex structures, incomplete functionality, lack of audible and visual feedback, inconvenient operation, and potential safety hazards. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide an unlocking prompt component and injection device with a simple structure that generates both sound and visual feedback during use, thus avoiding all or some of the aforementioned defects.

[0004] To solve the above-mentioned technical problems, the present invention provides an unlocking prompt component, which includes a trigger key, a housing, and a knob.

[0005] The trigger key is housed within the housing and has both a contacting and disengaged states with the knob.

[0006] The knob is housed within the housing, engages with the housing, and is rotatable relative to it. The outer wall of the knob is provided with a first mating part, and the outer wall of the knob is deformable radially.

[0007] The housing has an accommodating space inside, and the outer surface of the housing has a locking mark and an unlocking mark. The inner wall of the housing has a second mating part corresponding to the locking mark and the unlocking mark. The knob and the housing are interference-fitted through the first mating part or the second mating part. The first mating part can rotate between the locking mark and the unlocking mark. When the first mating part rotates to the second mating part, the outer wall of the knob that has been squeezed is released.

[0008] When the first mating part rotates to correspond with the locking mark, the trigger key and the knob are in a contact state; when the first mating part rotates to correspond with the unlocking mark, the trigger key and the knob are in a disengaged state, and the trigger key can move axially relative to the knob.

[0009] In this configuration, either the first mating part or the second mating part is a protrusion, and the other is a groove.

[0010] The knob includes a first part and a second part, both of which are hollow. The end of the first part abuts against the end of the housing, and the second part is housed within the housing.

[0011] The second part has a main body and a connecting part. One end of the main body is connected to the first part, and the other end of the main body is connected to the connecting part. There are multiple connecting parts, which are arranged at intervals along the circumferential direction. A first notch is formed between adjacent connecting parts. A first groove extending along the circumferential surface is provided on the connecting part. A protruding fastening member is provided on the inner wall of the housing. The fastening member is inserted into the first groove and can move within the first groove.

[0012] The main body portion adjacent to the first notch has a second groove that extends through and along the circumferential surface. A cantilever is formed between the second groove and the first notch, and the first mating portion is provided on the outer surface of the cantilever.

[0013] The second mating part includes a locking mating part and an unlocking mating part, wherein the locking mating part and the unlocking mating part correspond to the locking mark and the unlocking mark, respectively;

[0014] When the first mating part rotates between the locking mark and the unlocking mark, the cantilever deforms; when the first mating part rotates to the locking mating part or the unlocking mating part, the cantilever causes the first mating part to release.

[0015] Wherein, the curvature of the first groove is greater than or equal to the curvature of the arc surface between the locking engagement part and the unlocking engagement part.

[0016] The trigger key includes a protruding abutting part, the abutting part has an upper end face facing the knob, and the connecting part includes a lower end face away from the main body and facing the trigger key.

[0017] When the upper end face abuts against the lower end face, the trigger key and the knob are in abutting state, and the first mating part corresponds to the locking mark; when the knob rotates around the housing until the first mating part corresponds to the unlocking mark, the abutting part rotates to the first notch, the upper end face and the lower end face separate, and the trigger key and the knob are in a separated state, at which time the trigger key can move axially.

[0018] Wherein, the arc of the arc surface between the locking engagement part and the unlocking engagement part is greater than or equal to the arc of the upper end surface.

[0019] The outer surface of the first part is provided with a textured structure and a rotation mark. When the first mating part rotates to correspond with the locking mark, the rotation mark and the locking mark are located on the same axis. When the first mating part rotates to correspond with the unlocking mark, the rotation mark and the unlocking mark are located on the same axis.

[0020] To address the technical problem, this application also provides an injection device, which includes the aforementioned unlocking prompt component.

[0021] Compared with the prior art, the advantages of the unlocking prompt component and injection device of this utility model are: simple structure, reduced number of parts, and simplified assembly process; locking trigger device when locked to prevent accidental triggering; simultaneous sound and visual feedback during use to improve ease of operation and provide better safety protection. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded structural diagram of the first embodiment of the unlocking prompt component of this utility model;

[0024] Figure 2 This is a schematic diagram of the shell structure;

[0025] Figure 3 This is a cross-sectional view of the shell;

[0026] Figure 4 This is a structural diagram of the knob from a first-person perspective;

[0027] Figure 5 This is a structural diagram of the knob from a second perspective;

[0028] Figure 6 This is a schematic diagram of the trigger key structure;

[0029] Figure 7 This is a schematic diagram of the structure when the trigger button and the knob are in contact.

[0030] Figure 8 This is a schematic diagram of the structure when the trigger button and the knob are in the separated state. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicator will also change accordingly. The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] Please see Figures 1 to 8 , Figure 1 This is an exploded structural diagram of the unlocking prompt component of this utility model. The unlocking prompt component includes a trigger key 13, a housing 11, and a knob 12. The trigger key 13 is used to trigger the injection operation of the injection device. The knob 12 is used for unlocking and locking the injection device, as well as locking and unlocking the trigger key 13, thereby placing the trigger key 13 in a movable and immovable state. The housing 11 is used to house the trigger key 13 and part of the knob 12. The knob 12 is rotatable relative to the housing 11.

[0035] In one embodiment, the housing 11 is a cylinder. For ease of explanation, the length direction of the housing 11 is referred to as the axial direction, and the diameter direction of the housing 11 is referred to as the radial direction.

[0036] Specifically, the trigger key 13 is housed within the housing 11 and has both an abutting state and a disengaged state with the knob 12. During installation and use, the trigger key 13 and the knob 12 are arranged axially, with adjacent ends of the trigger key 13 and the knob 12 abutting each other; at this time, they are in an abutting state, and the trigger key 13 cannot move axially. When the knob 12 is rotated a certain angle, the adjacent ends of the trigger key 13 and the knob 12 disengage; at this time, they are in a disengaged state, and the trigger key 13 can then move freely axially to trigger the injection operation of the injection device.

[0037] The knob 12 is partially housed within the housing 11, engaging with and rotating relative to the housing 11. The outer wall of the knob 12 has a first mating part 121, and the outer wall of the knob 12 is press-fitted with the inner surface of the housing 11 and can deform radially. In practical use, the knob 12 is made of a material with a certain degree of rigidity and elasticity, capable of withstanding multiple deformations. Based on the above structural and material characteristics, the outer wall of the knob 12 is in a state of compression deformation when in contact with the housing 11.

[0038] The housing 11 has an internal space; specifically, the housing 11 is a hollow cylinder, and the internal space is used to accommodate the trigger button 13 and part of the knob 12. For example... Figure 2As shown, the outer surface of the housing 11 has a locking mark 111 and an unlocking mark 112. A second mating part is formed on the inner wall of the housing 11 at a location corresponding to the locking mark 111 and the unlocking mark 112. The knob 12 and the housing 11 are press-fitted through either the first mating part 121 or the second mating part. In the first embodiment, the first mating part 121 is a protrusion, and the second mating part is a groove. The knob 12 abuts against the inner wall of the housing 11 through the protruding first mating part 121. The press-fitting of the knob 12 with the housing 11 causes radial deformation of the outer wall of the knob 12. When the first mating part 121 and the second mating part coincide, due to the height difference between the groove and other inner walls of the housing 11, the knob 12 is released outwards, causing the protrusion to engage with the groove. In the second embodiment, the first mating part 121 is a groove, and the second mating part is a protrusion. The housing 11 abuts against the outer wall of the knob 12 through the outwardly protruding second mating part. The knob 12 and the housing 11 are interference-fitted, causing the outer wall of the knob 12 to deform radially. When the first mating part 121 and the second mating part coincide, due to the height difference between the groove and other wall surfaces on the knob 12, the knob 12 is released outward, causing the groove to fit over the protrusion. The first mating part 121 can rotate between the locking mark 111 and the unlocking mark 112. Based on the above embodiment, there is a height difference between the first mating part 121 and the second mating part. When the first mating part 121 rotates to the second mating part, the compressed outer wall of the knob 12 causes the first mating part 121 to release, producing a clicking sound. That is, when the knob 12 rotates to the groove position corresponding to the locking mark 111 or the unlocking mark 112, the unlocking prompt component will generate an audible feedback signal to prompt the user that it has been rotated to a specific functional position.

[0039] For ease of explanation, this specification will use the first embodiment described above as an example.

[0040] When using the unlocking prompt component of this application, rotating the knob 12 causes the first engaging part 121 to align with the locking mark 111, triggering an audible feedback. At this point, the trigger button 13 is in contact with the knob 12, and the knob 12 also aligns with the locking mark 111, providing visual feedback so the user can perceive that the device is in the locked state. Continuing to rotate the knob 12 until the first engaging part 121 aligns with the unlocking mark 112 again triggers an audible feedback, and the trigger button 13 is disengaged from the knob 12. The external unlocking mark 112 provides visual feedback, allowing the user to perceive that the device is in the unlocked state. At this point, the trigger button 13 can move axially relative to the knob 12. This structure provides both audible and visual feedback during use, facilitating user operation and improving ease of use.

[0041] like Figure 4 and Figure 5As shown, the knob 12 in this application is also a hollow cylinder, including a first part 10 and a second part 20. Both the first part 10 and the second part 20 are hollow. The diameter of the first part 10 is equal to the diameter of the housing 11. The end of the first part 10 abuts against the end of the housing 11. The diameter of the second part 20 is smaller than the diameter of the first part 10 and the diameter of the housing 11. The second part 20 is accommodated inside the housing 11.

[0042] The second part 20 has a main body 21 and a connecting part 22. One end of the main body 21 is connected to the first part 10, and the other end of the main body 21 is connected to the connecting part 22. There are multiple connecting parts 22, which are arranged at intervals along the circumferential direction. A first notch 23 is formed between adjacent connecting parts 22. A first groove 221 extending along the circumferential surface is provided on the connecting part 22. The first groove 221 can be configured to penetrate the connecting part 22 or to be a non-penetrating recessed structure, as long as a fastening position is formed on the connecting part 22. A protruding fastening member 113 is provided on the inner wall of the housing 11. The fastening member 113 is engaged in the first groove 221 and can move within the first groove 221, so that the knob 12 and the housing 11 remain connected when they rotate relative to each other.

[0043] In this application, a second groove 211 extending through and along the circumferential surface is provided in the portion of the main body 21 adjacent to the first notch 23, forming a cantilever 212 between the second groove 211 and the first notch 23. The actual shape of the cantilever 212 is an arc surface, with both ends of the arc connected to the main body 21. The two sides of the arc are the hollow second groove 211 and the first notch 23, respectively. The cantilever 212 will deform when subjected to radial pressure. A first mating part 121 is provided on the outer surface of the cantilever 212, specifically at the center of the arc surface of the cantilever 212. Since the outer wall of the knob 12 is pressurized to the inner wall of the housing 11, the cantilever 212 is also subjected to radial deformation under pressure when in the mating state. When the first mating part 121 rotates to the second mating part, the cantilever 212 releases, causing the first mating part 121 to move outward and engage with the second mating part.

[0044] like Figure 3 As shown, the second mating part in this application includes a locking mating part 114 and an unlocking mating part 115. Based on the first embodiment, both the locking mating part 114 and the unlocking mating part 115 are grooves and extend along the axial direction. The positions of the locking mating part 114 and the unlocking mating part 115 correspond to the locking mark 111 and the unlocking mark 112, respectively.

[0045] When the first mating part 121 rotates between the locking mark 111 and the unlocking mark 112, the cantilever 212 is compressed and deformed, and the first mating part 121 abuts against the inner wall of the housing 11. When the first mating part 121 rotates to the locking mating part 114 or the unlocking mating part 115, the cantilever 212 is released, causing the first mating part 121 to engage in the locking mating part 114 or the unlocking mating part 115.

[0046] In this application, the curvature of the first groove 221 is greater than or equal to the curvature of the arc surface between the locking engagement part 114 and the unlocking engagement part 115, thereby giving the knob 12 more room to rotate and allowing it to rotate between the locking engagement part 114 and the unlocking engagement part 115.

[0047] like Figure 6 As shown, the trigger key 13 in this application includes a protruding abutment portion 131, the abutment portion 131 has an upper end surface 132 facing the knob 12, and the connecting portion 22 includes a lower end surface 222 away from the main body portion 21 and facing the trigger key 13.

[0048] When the upper end face 132 abuts against the lower end face 222, the trigger key 13 and the knob 12 are in abutting state, such as Figure 7 As shown, at this time, the first mating part 121 corresponds to the locking mark 111. When the knob 12 rotates around the housing 11 until the first mating part 121 corresponds to the unlocking mark 112, the abutment part 131 rotates to the first notch 23, as shown. Figure 8 As shown, the upper end face 132 is separated from the lower end face 222, and the trigger key 13 and the knob 12 are in a separated state. At this time, the trigger key 13 can move along the axial direction.

[0049] In this application, the arc of the arc surface between the locking engagement portion 114 and the unlocking engagement portion 115 is greater than or equal to the arc of the upper end face 132. In one embodiment, the arc surface dimension of the lower end face 222 is greater than the arc surface dimension of the upper end face 132. When the upper end face 132 abuts against the lower end face 222, one end of the lower end face 222 is flush with the end of the upper end face 132. When the knob 12 is rotated from the unlocking engagement portion 115 to the locking engagement portion 114, the upper end face 132 needs to disengage from the lower end face 222. Therefore, the arc of the upper end face 132 needs to be less than or equal to the arc of the arc surface between the locking engagement portion 114 and the unlocking engagement portion 115.

[0050] Please see Figure 4 In this application, the outer surface of the first part 10 is provided with a textured structure 101 to increase friction and facilitate the user to rotate the knob 12. The textured structure 101 can be a vertically or obliquely arranged strip-shaped protrusion, a thread structure, or a complex pattern.

[0051] In this application, the outer surface of the first part 10 is also provided with a rotation mark 102. When the first mating part 121 rotates to correspond with the locking mark 111, the rotation mark 102 and the locking mark 111 are located on the same axis. When the first mating part 121 rotates to correspond with the unlocking mark 112, the rotation mark 102 and the unlocking mark 112 are located on the same axis. The user can determine the current usage status of the component based on the locking mark 111 or the unlocking mark 112 corresponding to the rotation mark 102.

[0052] To address the technical problem, this application also provides an injection device, which includes the aforementioned unlocking prompt component. The unlocking prompt component provides both audible and visual feedback to the injection device, facilitating user operation.

[0053] The unlocking prompt component and injection device of this utility model have a simple structure, reduce the number of parts, and simplify the assembly process; when locked, the locking trigger device prevents accidental triggering; during use, it generates both audible and visual feedback, improving operational convenience and providing better safety protection.

[0054] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An unlock prompt component, characterized in that, The unlock prompt component includes a trigger button, a housing, and a knob; The trigger key is housed within the housing and has both a contacting and disengaged states with the knob. The knob is housed within the housing, engages with the housing, and is rotatable relative to it. The outer wall of the knob is provided with a first mating part, and the outer wall of the knob is deformable radially. The housing has an accommodating space inside, and the outer surface of the housing has a locking mark and an unlocking mark. The inner wall of the housing has a second mating part corresponding to the locking mark and the unlocking mark. The knob and the housing are interference-fitted through the first mating part or the second mating part. The first mating part can rotate between the locking mark and the unlocking mark. When the first mating part rotates to the second mating part, the outer wall of the knob that has been squeezed is released. When the first mating part rotates to correspond with the locking mark, the trigger key and the knob are in a contact state; when the first mating part rotates to correspond with the unlocking mark, the trigger key and the knob are in a disengaged state, and the trigger key can move axially relative to the knob.

2. The unlock prompt component according to claim 1, characterized in that, Either the first mating part or the second mating part is a protrusion, and the other is a groove.

3. The unlock prompt component according to claim 2, characterized in that, The knob includes a first part and a second part, both of which are hollow. The end of the first part abuts against the end of the housing, and the second part is housed within the housing. The second part has a main body and a connecting part. One end of the main body is connected to the first part, and the other end of the main body is connected to the connecting part. There are multiple connecting parts, which are arranged at intervals along the circumferential direction. A first notch is formed between adjacent connecting parts. A first groove extending along the circumferential surface is provided on the connecting part. A protruding fastening member is provided on the inner wall of the housing. The fastening member is inserted into the first groove and can move within the first groove.

4. The unlock prompt component according to claim 3, characterized in that, The main body portion adjacent to the first notch has a second groove that extends through and along the circumferential surface, and a cantilever is formed between the second groove and the first notch, with the first mating portion disposed on the outer surface of the cantilever.

5. The unlock prompt component according to claim 4, characterized in that, The second mating part includes a locking mating part and an unlocking mating part, wherein the locking mating part and the unlocking mating part correspond to the locking mark and the unlocking mark, respectively; When the first mating part rotates between the locking mark and the unlocking mark, the cantilever deforms; when the first mating part rotates to the locking mating part or the unlocking mating part, the cantilever causes the first mating part to release.

6. The unlock prompt component according to claim 5, characterized in that, The curvature of the first groove is greater than or equal to the curvature of the arc surface between the locking engagement part and the unlocking engagement part.

7. The unlock prompt component according to claim 5, characterized in that, The trigger key includes a protruding abutment portion, the abutment portion having an upper end face facing the knob side, and the connecting portion including a lower end face away from the main body and facing the trigger key side; When the upper end face abuts against the lower end face, the trigger key and the knob are in abutting state, and the first mating part corresponds to the locking mark; when the knob rotates around the housing until the first mating part corresponds to the unlocking mark, the abutting part rotates to the first notch, the upper end face and the lower end face separate, and the trigger key and the knob are in a separated state, at which time the trigger key can move axially.

8. The unlock prompt component according to claim 7, characterized in that, The arc of the arc surface between the locking engagement part and the unlocking engagement part is greater than or equal to the arc of the upper end surface.

9. The unlock prompt component according to claim 3, characterized in that, The outer surface of the first part is provided with a textured structure and a rotation mark. When the first mating part rotates to correspond with the locking mark, the rotation mark and the locking mark are located on the same axis. When the first mating part rotates to correspond with the unlocking mark, the rotation mark and the unlocking mark are located on the same axis.

10. An injection device, characterized in that, The injection device includes the unlock prompt component as described in any one of claims 1-9.

Images