Injection device

Abstract

The utility model discloses an injection device. The injection device comprises a shell; the dose indicator is in threaded connection with the inner side wall of the shell; the sleeve is rotatably arranged in the shell and circumferentially limited with the dose indicator, so that when the sleeve rotates, the dose indicator is driven to synchronously rotate, and the dose indicator can axially move relative to the sleeve; one of the dose indicator and the sleeve is provided with a first sound prompt part, the other one of the dose indicator and the sleeve is provided with a second sound prompt part, during injection, the sleeve rotates towards the first direction, the dose indicator moves towards the injection end, and when injection is finished, the first sound prompt part and the second sound prompt part cooperate to carry out sound prompt. The most direct feedback of injection completion can be given to a user through sound prompt, the user can conveniently confirm the injection completion in time, whether the injection is completed or not can be known without enabling the injection device to be in a specific direction, during injection, the requirement for the taking mode of the injection device is flexible, injection completion information is conveniently prompted, and great convenience is brought to use of the user.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to an injection device. Background Technology

[0002] With the development of medical device technology, injection devices have been widely used in the medical field.

[0003] However, in related technologies, the injection device indicates that the injection is complete by displaying a zero mark on the housing 1.

[0004] However, this method of indicating that the injection is complete is not direct. Users need to observe the zero mark to confirm whether the injection is complete. It has high requirements for the orientation of the injection device. When the displayed zero mark is not aligned with the user, it is inconvenient to observe and makes it difficult for users to confirm whether the injection is complete.

[0005] Therefore, how to provide an injection device that conveniently indicates that the injection is complete is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide an injection device that conveniently displays information indicating that the injection is complete.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An injection device, comprising:

[0009] case;

[0010] A dose indicator is threadedly connected to the inner wall of the housing;

[0011] A sleeve is rotatably disposed within the housing and circumferentially limited to the dose indicator, so that when the sleeve rotates, it drives the dose indicator to rotate synchronously, and the dose indicator can move axially relative to the sleeve.

[0012] One of the dosage indicator and the sleeve is provided with a first sound prompting part, and the other is provided with a second sound prompting part. When the injection device injects, the sleeve rotates in a first direction, and the dosage indicator moves towards the injection end of the injection device. When the injection device finishes injecting, the first sound prompting part and the second sound prompting part cooperate to provide a sound prompt.

[0013] Optionally, the first sound prompting part is a spring, and the second sound prompting part is a groove. When the injection is completed, the spring spring is inserted into the groove and makes a sound.

[0014] Optionally, the spring includes:

[0015] A spring arm is located at one end of the sleeve near the injection end;

[0016] A protrusion, radially outwardly protruding from the free end of the spring arm, is used to spring into the groove to produce the audible prompt.

[0017] Optionally, the sleeve has two parallel first grooves extending axially from one end to the other end near the injection end, and the spring arm is formed between the two first grooves.

[0018] Alternatively, the sleeve may have a second groove around the spring arm on the side wall near the injection end, so that the two sides of the spring arm and the free end of the spring arm are separated from the side wall of the sleeve.

[0019] Optionally, the groove is located at one end of the dose indicator near the injection end and extends through the wall thickness of the dose indicator.

[0020] Optionally, the number of spring pieces is two, and the two spring pieces are symmetrically arranged about the axis of the sleeve; the number of grooves is one.

[0021] Optionally, the dose indicator is provided with a digital printing section, and the housing is provided with an observation window. The observation window is used to display the dose value at the location where the digital printing section is aligned with the observation window. When the injection device finishes injecting, the zero mark of the digital printing section is aligned with the observation window.

[0022] Optionally, the observation window is provided with a transparent protective cover, which is sealed to the housing.

[0023] Optionally, the housing is provided with a first limiting portion for abutting against the dose indicator to stop the dose indicator from moving toward the injection end; and / or,

[0024] The housing is provided with a cover at one end away from the injection end. The cover is provided with a second limiting part for cooperating with the dose indicator to limit the maximum dose position of the dose indicator.

[0025] Optionally, one of the sleeve and the dose indicator is provided with a limiting rib, and the other is provided with a limiting groove. The limiting rib and the limiting groove are slidably engaged so that the sleeve and the dose indicator are circumferentially limited and axially rotatable relative to each other.

[0026] The injection device provided by this utility model has a dosage indicator that is threadedly connected to the inner wall of the housing. Therefore, when the dosage indicator rotates, it also moves axially, that is, it makes a spiral motion while rotating and moving. Based on this, when the injection device injects, the sleeve rotates in the first direction, which in turn drives the dosage indicator to rotate synchronously in the first direction, so that the dosage indicator moves axially while rotating, so that the dosage indicator is close to the injection end of the injection device. When the injection is completed, the first sound prompt part is aligned with the second sound prompt part, and the two cooperate with each other to make a sound prompt.

[0027] Audible prompts provide users with direct feedback on injection completion, allowing them to promptly confirm the injection's completion. Compared to visual prompts in related technologies, this eliminates the need for the injection device to be in a specific position to indicate completion. Therefore, the handling of the injection device during injection is more flexible, facilitating prompts and enhancing user convenience. Furthermore, in some preferred embodiments, audible prompts are generated by a spring-loaded disc engaging a groove, resulting in a simple structure that eliminates the need for excessive size control and complex product shapes. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the injection device provided in a specific embodiment of the present invention, showing the spring clip springing into the groove after injection is completed;

[0030] Figure 2 This is a schematic diagram of the structure when the spring has not yet entered the groove before the injection device has finished injecting;

[0031] Figure 3 This is a schematic diagram of the sleeve structure;

[0032] Figure 4 This is a schematic diagram of the dose indicator.

[0033] Figure 5 A schematic diagram showing the structure when the zero mark of the digital printing section of the dose indicator is aligned with the observation window of the housing;

[0034] Figure 6 This is a schematic diagram of the structure when one end of the dose indicator abuts against the first limiting part;

[0035] Figure 7This is a schematic diagram of the structure after the sleeve and dose indicator are assembled.

[0036] Figure label:

[0037] 1-Shell; 11-Observation window; 12-First limiting part; 13-Shell cover; 2-Dose indicator; 21-Groove; 22-Digital printing part; 23-Limiting rib; 3-Sleeve; 31-Spring; 311-Spring arm; 312-Protrusion; 313-Second groove; 32-Limiting groove. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0039] The core of this invention is to provide an injection device that conveniently displays information indicating that the injection is complete.

[0040] Please refer to Figure 1 and Figure 2 This utility model provides an injection device, including a housing 1, a dosage indicator 2, and a sleeve 3. The dosage indicator 2 is threadedly connected to the inner wall of the housing 1. The sleeve 3 is rotatably disposed inside the housing 1, and the sleeve 3 and the dosage indicator 2 are circumferentially limited so that when the sleeve 3 rotates, it drives the dosage indicator 2 to rotate synchronously, and the dosage indicator 2 can move axially relative to the sleeve 3. One of the dosage indicator 2 and the sleeve 3 is provided with a first sound prompting part, and the other is provided with a second sound prompting part. When the injection device injects, the sleeve 3 rotates in a first direction, and the dosage indicator 2 moves towards the injection end of the injection device. When the injection device finishes injecting, the first sound prompting part and the second sound prompting part cooperate to provide an audible prompt.

[0041] It should be noted that in this embodiment of the utility model, axial direction refers to the axial direction of the housing 1, and circumferential direction refers to the circumferential direction of the housing 1. Furthermore, it can be understood that the circumferential limiting of the sleeve 3 and the dose indicator 2 means that their relative positions along the circumferential direction are relatively stationary, with no relative circumferential movement; they either rotate synchronously or remain synchronously stationary. Additionally, since the dose indicator 2 is threadedly connected to the inner wall of the housing 1, when the dose indicator 2 rotates, it simultaneously moves axially, that is, it performs a spiral motion of rotating and moving simultaneously. Based on this, when the injection device injects, the sleeve 3 rotates in the first direction, thereby driving the dose indicator 2 to rotate synchronously in the first direction, thus causing the dose indicator 2 to rotate and move axially simultaneously, bringing the dose indicator 2 closer to the injection end of the injection device. When the injection is completed, the first audible prompt part is aligned with the second audible prompt part. The first and second audible prompt parts cooperate to provide an audible prompt.

[0042] Clearly, audible prompts provide users with the most direct feedback that the injection is complete, making it easy for them to confirm that the injection is finished. Compared to visual prompts in related technologies, it eliminates the need for the injection device to be in a specific position to indicate whether the injection is complete. Therefore, the way the injection device is handled during injection is more flexible, and it is convenient to provide information that the injection is complete, bringing many conveniences to the user.

[0043] In some embodiments, the first sound prompting part is a spring 31, and the second sound prompting part is a groove 21. When the injection is completed, the spring 31 springs into the groove 21 and produces a sound upon impact. That is, when the injection is completed, the spring 31 is exactly aligned with the groove 21. Under the action of its own elastic force, the spring 31 can spring into the groove 21 (it can be understood that when the spring 31 is not aligned with the groove 21, the spring 31 is in a compressed state and has a certain elastic force). When the spring 31 springs into the groove 21, the spring 31 collides with the groove wall of the groove 21 to produce a sound, which serves as a sound prompting function. Moreover, the sound prompting function achieved by the spring 31 springing into the groove 21 is simple in structure and does not require excessive size control or complex product shape.

[0044] To facilitate the placement of the spring 31, in some embodiments, the spring 31 is a spring arm 311 located at the end of the sleeve 3 near the injection end. The free end of the spring arm 311 has a radially outward protrusion 312, which is used to spring into the groove 21 to produce an audible alert. That is, in this embodiment, the spring 31 is located on the sleeve 3, and the groove 21 is located on the dose indicator 2. It is understood that since the dose indicator 2 rotates and moves axially, placing the groove 21 on the dose indicator 2 helps to prevent the spring 31 from easily colliding or interfering with other structures of the housing 1 when it is placed on the dose indicator 2. In addition, by setting the spring arm 311 at one end of the sleeve 3 to form the spring 31, the structure is simple and easy to place. Moreover, the radially outward protrusion 312 at the free end of the spring arm 311, which springs into the groove 21 to produce an audible alert, helps to increase the contact area when the spring 31 collides with the groove 21, which is more conducive to producing an audible alert.

[0045] Additionally, please refer to Figure 3 To facilitate the formation of the spring arm 311, in some embodiments, the sleeve 3 has two parallel grooves extending axially from one end to the other end near the injection end, forming the spring arm 311 between the two grooves; or, the side wall of the sleeve 3 near the injection end has a groove surrounding the spring arm 311, so that the two sides and the free end of the spring arm 311 are separated from the side wall of the sleeve 3. That is to say, in this embodiment, the spring arm 311 is formed by setting grooves on the side wall of the sleeve 3. The end of the spring arm 311 can be flush with the end of the sleeve 3, or there can be a certain distance between them, so that the spring arm 311 is in a suitable position. As long as the groove can ensure that the two sides and the free end of the spring arm 311 are separated from the side wall of the sleeve 3, the spring arm 311 becomes a cantilever structure, which is beneficial for the protrusion 312 to spring into the groove 21. It should be noted that when two parallel grooves are provided at one end of the sleeve 3 near the injection end, extending axially from one end to the other end, and a spring arm 311 is formed between the two grooves, the two grooves correspond to one spring arm 311. When there are two or more spring arms 311, there are a corresponding number of grooves.

[0046] Additionally, please refer to Figure 4 To facilitate the setting of the groove 21, in some embodiments, the groove 21 is located at the end of the dose indicator 2 near the injection end and penetrates the wall thickness of the dose indicator 2. That is, the groove 21 is formed by directly setting a hole penetrating the wall thickness of the dose indicator 2, which is simple to process and easy to implement. In addition, by making the groove 21 penetrate the wall thickness of the dose indicator 2, it is beneficial to improve the reliability of the fit between the spring 31 and the groove 21, so that when the dose indicator 2 stops rotating after injection, the circumferential limiting effect of the dose indicator 2 on the sleeve 3 can also be improved.

[0047] In addition, to facilitate the installation of the sleeve 3, in some embodiments, there are two spring pieces 31, which are symmetrically arranged about the axis of the sleeve 3; and there is one groove 21. That is to say, the structure of the sleeve 3 is axially symmetrical. It can be understood that one groove 21 mates with one spring piece 31. During installation, the groove 21 and one of the spring pieces 31 need to be aligned axially. Therefore, the installation orientation of the sleeve 3 is not critical, and the sleeve 3 can be rotated 180 degrees for installation, which brings convenience to the installation.

[0048] Additionally, please refer to Figure 5 In some embodiments, the dosage indicator 2 is provided with a digital printing section 22, and the housing 1 is provided with an observation window 11. The observation window 11 is used to display the dosage value at the point where the digital printing section 22 is aligned with the observation window 11. When the injection device completes the injection, the zero mark of the digital printing section 22 is aligned with the observation window 11. That is to say, in this embodiment, in addition to the function of audible prompts, there are also visual prompts. When the zero mark of the digital printing section 22 is observed in the observation window 11, it indicates that the injection is complete. That is, the dual prompts of audible and visual prompts are used to improve the accuracy of confirming the completion of the injection.

[0049] Furthermore, to prevent dust, impurities, etc., from entering the interior of the housing 1 through the observation window 11 and affecting the movement of moving parts, in some embodiments, the observation window 11 is provided with a transparent protective cover, which is sealed to the housing 1. That is, in this embodiment, by providing a protective cover to the observation window 11, a protective function is achieved, preventing dust, impurities, and moisture from entering the interior of the housing 1 and affecting the internal parts. It is understood that the protective cover is made of a transparent material to ensure observation of the scale of the digital printing section 22. The sealed connection between the protective cover and the housing 1 ensures the protective performance of the cover. It should be noted that this embodiment does not limit the specific implementation method of the sealed connection between the protective cover and the housing 1. For example, the protective cover and the housing 1 can be bonded with an adhesive, or a sealing element can be provided between the protective cover and the housing 1 to achieve a sealing effect, or a mechanical labyrinth structure can be provided between the protective cover and the housing 1 to achieve a sealing effect.

[0050] Additionally, please refer to Figure 6 To ensure injection accuracy, in some embodiments, the housing 1 is provided with a first limiting part 12 for contacting the dose indicator 2 to stop the dose indicator 2 from moving towards the injection end. That is, when the injection device injects, the sleeve 3 rotates in the first direction, causing the dose indicator 2 to rotate in the first direction and move towards the injection end until the dose indicator 2 contacts the first limiting part 12. Under the limiting action of the first limiting part 12, the dose indicator 2 stops rotating, thereby stopping the sleeve 3 from rotating, and the injection is completed, ensuring the accuracy of the injection dosage.

[0051] It should be noted that the specific structure of the first limiting part 12 is not limited in this embodiment, as long as the first limiting part 12 can stop and limit the dose indicator 2. In some embodiments, the limiting part is an inner annular tooth provided on the inner sidewall of the housing 1 and distributed circumferentially. That is, in this embodiment, one end of the inner annular tooth stops and limits the dose indicator 2 near the injection end. The inner annular tooth also facilitates the limiting of other structural components by engaging with a spline structure, thus realizing the multifunctionality of the first limiting part 12.

[0052] Additionally, in some embodiments, a cap 13 is provided at the end of the housing 1 furthest from the injection end (e.g., Figure 5 As shown, the housing 13 is provided with a second limiting part for cooperating with and limiting the dose indicator 2 to limit the maximum dose position of the dose indicator 2. That is, in this embodiment, the second limiting part on the housing 13 limits the dose indicator 2 to its maximum extreme position away from the injection end, thereby limiting the maximum set dose. It can be understood that when the dose indicator 2 is at its maximum extreme position away from the injection end, there is a maximum travel distance from that position to the position closest to the injection end, thus enabling the injection device to have the maximum injection dose. It should be noted that this embodiment does not limit the specific structure of the second limiting part, as long as it can achieve the stopping and limiting function of the second limiting part on the dose indicator 2.

[0053] Additionally, please refer to Figure 7 To ensure the relative movement between the sleeve 3 and the dose indicator 2, in some embodiments, one of the sleeve 3 and the dose indicator 2 is provided with a limiting rib 23, and the other is provided with a limiting groove 32. The limiting rib 23 and the limiting groove 32 are slidably engaged, so that the sleeve 3 and the dose indicator 2 are circumferentially limited and axially rotatable relative to each other. It can be understood that the limiting rib 23 is embedded in the limiting groove 32 and engages with the limiting groove 32 to achieve circumferential relative fixation between the sleeve 3 and the dose indicator 2, ensuring that the sleeve 3 and the dose indicator 2 rotate synchronously; at the same time, the limiting rib 23 and the limiting groove 32 can slide relative to each other, thereby ensuring axial movement of the dose indicator 2 relative to the sleeve 3. Therefore, in this embodiment, the circumferential limitation and axial relative rotation between the sleeve 3 and the dose indicator 2 are achieved through the engagement of the limiting rib 23 and the limiting groove 32.

[0054] It should be noted that this embodiment does not limit the specific number of limiting ribs 23 and limiting grooves 32. The number of limiting ribs 23 and limiting grooves 32 can be one or at least two. In some embodiments, the number of limiting ribs 23 and limiting grooves 32 are two each, and they are arranged in a one-to-one correspondence. The two limiting ribs 23 are arranged symmetrically, and the two limiting grooves 32 are arranged symmetrically.

[0055] It should be noted that this embodiment of the invention does not limit the structure and functional implementation principles of other parts of the injection device. Those skilled in the art can refer to the relevant technologies, which will not be elaborated here.

[0056] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0058] The injection device provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. An injection device, characterized in that, include: Shell (1); The dose indicator (2) is threaded to the inner wall of the housing (1); The sleeve (3) is rotatably disposed inside the housing (1) and is circumferentially limited to the dose indicator (2) so that when the sleeve (3) rotates, it drives the dose indicator (2) to rotate synchronously, and the dose indicator (2) can move axially relative to the sleeve (3). One of the dose indicator (2) and the sleeve (3) is provided with a first sound prompting part, and the other is provided with a second sound prompting part. When the injection device injects, the sleeve (3) rotates in the first direction, and the dose indicator (2) moves towards the injection end of the injection device. When the injection device finishes injecting, the first sound prompting part and the second sound prompting part cooperate to provide a sound prompt.

2. The injection device according to claim 1, characterized in that, The first sound prompting part is a spring (31), and the second sound prompting part is a groove (21). When the injection is completed, the spring (31) is ejected into the groove (21) and makes a sound.

3. The injection device according to claim 2, characterized in that, The spring clip (31) includes: A spring arm (311) is located at one end of the sleeve (3) near the injection end; A protrusion (312) protrudes radially outward from the free end of the spring arm (311), and the protrusion (312) is used to spring into the groove (21) to emit the sound prompt.

4. The injection device according to claim 3, characterized in that, The sleeve (3) has two parallel first grooves extending axially from one end to the other end near the injection end, and the spring arm (311) is formed between the two first grooves. Alternatively, the sleeve (3) may have a second groove (313) around the spring arm (311) on the side wall near the injection end, so that the two sides of the spring arm (311) and the free end of the spring arm (311) are separated from the side wall of the sleeve (3).

5. The injection device according to claim 2, characterized in that, The groove (21) is located at one end of the dose indicator (2) near the injection end and extends through the wall thickness of the dose indicator (2).

6. The injection device according to claim 2, characterized in that, The number of the spring pieces (31) is two, and the two spring pieces (31) are symmetrically arranged about the axis of the sleeve (3); the number of the grooves (21) is one.

7. The injection device according to any one of claims 1-5, characterized in that, The dose indicator (2) is provided with a digital printing section (22), and the housing (1) is provided with an observation window (11). The observation window (11) is used to display the dose value of the part of the digital printing section (22) aligned with the observation window (11). When the injection device finishes injecting, the zero mark of the digital printing section (22) is aligned with the observation window (11).

8. The injection device according to claim 7, characterized in that, The observation window (11) is provided with a transparent protective cover, which is sealed to the housing (1).

9. The injection device according to any one of claims 1-5, characterized in that, The housing (1) is provided with a first limiting part (12) for abutting against the dose indicator (2) to stop the dose indicator (2) from moving toward the injection end; and / or, The housing (1) has a cover (13) at one end away from the injection end. The cover (13) has a second limiting part for cooperating with the dose indicator (2) to limit the maximum dose position of the dose indicator (2).

10. The injection device according to any one of claims 1-5, characterized in that, One of the sleeve (3) and the dose indicator (2) is provided with a limiting rib (23), and the other is provided with a limiting groove (32). The limiting rib (23) and the limiting groove (32) are slidably engaged so that the sleeve (3) and the dose indicator (2) are circumferentially limited and axially rotatable relative to each other.

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