Novel release structure for injection pen

Abstract

The utility model relates to the technical field of injection devices, in particular to a novel release structure for an injection pen, which is characterized in that a separation blade and a release boss are fixed on the inner wall of a release block body, the upper end surface of the separation blade is provided with an upper guide inclined surface, and the lower end surface of the release boss is provided with a pulling inclined surface; the lower end of the release block body is provided with an open groove, and the release block body slides on the outer wall of the fixing unit in a limited mode through the open groove. The inner wall of the fixing unit is connected with the injection unit in a hanging mode through a boss of the injection unit. The upper guide inclined surface is attached to the boss of the injection unit; the pulling and rotating inclined surface of the release boss is in contact with the boss on the injection unit and pulls and rotates; a guide nail is fixed in the fixing unit; the injection pen has the beneficial effects that the problem that the existing injection pen is easy to be not triggered due to the requirement that the existing injection pen needs holding and clamping parts made of different materials for different force values is solved.

Description

Technical Field

[0001] This utility model relates to the field of injection device technology, and more specifically to a novel release structure for an injection pen. Background Technology

[0002] The current solution for injection pens on the market involves moving the release unit to make way for the clamping parts, allowing the force of the elastic element to drive the clamping parts to deform, thereby achieving the purpose of release.

[0003] Most of them adopt the form of yielding, and cannot interfere with the pusher, so as to achieve the purpose of releasing in any situation;

[0004] A trigger-type mechanical injection pen, similar to one described in patent CN202010860743.1, includes: a pen body; a dose adjustment knob located at one end of the pen body and rotatable about its axis; a dose adjustment seat; a drug reservoir assembly; a viewing window tube located within a first channel and having a viewing window channel extending through it along its axis, a portion of which is formed as a hollow, transparent, or semi-transparent piece, one end of which passes through a third channel and extends into a second channel and engages with the dose adjustment knob; a drive rod, one end of which is inserted into a fourth channel; a first elastic element located between a limiting part and a metering display rod; a release button, at least a portion of which is movably located within the second channel and opposite to the other end of the drive rod; and a screw, at least a portion of which extends into a screw seat channel and is threadedly connected to the screw seat, the other end of which extends into the interior of the drug reservoir assembly and is connected to a sealing piston. This trigger-type injection pen enables dose adjustment and one-button injection, and has advantages such as simple structure and ease of use.

[0005] Therefore, the existing technical solutions have shortcomings. Currently, the injection pen requires clamping parts made of different materials for different force values; and the current injection pen is prone to the problem of not triggering. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the problem in the existing technology that the injection pen requires clamping parts made of different materials for different force values, and that the injection pen may not trigger.

[0007] Therefore, the technical solution adopted is a novel release structure for an injection pen, which includes a baffle and a release boss fixed on the inner wall of the release block body. The upper end face of the baffle is provided with an upper guide slope, and the lower end face of the release boss is provided with a pull-out slope.

[0008] Preferably, the lower end of the release block body is provided with a slot, and the release block body slides on the outer wall of the fixing unit by being limited by the slot.

[0009] Preferably, the inner wall of the fixing unit is connected to the injection unit via the protrusion of the injection unit.

[0010] Preferably, the baffle conforms to the protrusion of the injection unit to block it.

[0011] Preferably, the upper guide slope is attached to the protrusion of the injection unit.

[0012] Preferably, the rotating ramp of the release boss contacts and rotates with the boss on the injection unit.

[0013] Preferably, a guide pin is fixed inside the fixing unit, and a spring is sleeved on the guide pin.

[0014] Preferably, the two ends of the spring are fixed in the injection unit and the fixing unit, respectively.

[0015] Preferably, a fixing block is engaged between the top end of the fixing unit and the top end of the release block body.

[0016] Preferably, the release block body is assembled with a spring, a fixing block, a guide pin, an injection unit, and a fixing unit to form an injection pen.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention may be realized and obtained through the structures particularly pointed out in this application.

[0018] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the release block body of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the release block body of this utility model. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the internal structure of the release block body of this utility model. Figure 2 ;

[0023] Figure 4 This is an exploded view of the overall structure of the injection pen of this utility model;

[0024] Figure 5This is a schematic diagram of the connection structure between the injection unit and the fixing unit of this utility model;

[0025] Figure 6 This is a schematic diagram of the baffle structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the release boss for rotary release according to this utility model. Figure 1 ;

[0027] Figure 8 This is a schematic diagram of the structure of the release boss for rotary release according to this utility model. Figure 2 ;

[0028] Figure 9 This is a schematic diagram of the structure of the release boss for rotary release according to this utility model. Figure 3 .

[0029] In the figure: release block body 1; baffle 1.1; release boss 1.2; guide ramp 1.1.1; pull-out ramp 1.2.1; injection unit 2; fixing unit 3; spring 200; fixing block 300; guide pin 400. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the description of this application, it should be understood that the terms "middle," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Specific implementation method one:

[0035] like Figure 1 — Figure 9 As shown, a novel release structure for an injection pen includes a baffle 1.1 and a release boss 1.2 fixed on the inner wall of the release block body 1. The upper end face of the baffle 1.1 is provided with an upper guide slope 1.1.1, and the lower end face of the release boss 1.2 is provided with a pull-out slope 1.2.1.

[0036] The working principle and beneficial effects of this embodiment are as follows: by using this release structure, the release structure includes a release block body 1, a baffle 1.1 and a release boss 1.2. A guide slope 1.1.1 is provided on the baffle 1.1, and a release pull-out slope 1.2.1 is provided on the release boss 1.2;

[0037] When using:

[0038] Injection unit 2 is hung on fixed unit 3 and then blocked by baffle 1.1 of release part; when in use, after the protective shell pushes the release part to move a certain distance, baffle 1.1 separates from injection unit 2, and at the same time, the pull-out ramp 1.2.1 on release boss 1.2 contacts and pulls out the boss on injection unit 2, thereby releasing injection unit 2; since it is a direct pull-out, the inevitability of triggering is guaranteed; thus ensuring the functionality and reliability of the product.

[0039] This solution addresses the issue of different material requirements for springs with varying force values ​​in previous solutions; it also resolves the potential for injection failure. The release structure in this solution is applied in the injection pen to release the ejection mechanism before automatic injection. Specific Implementation Method Two:

[0041] like Figure 1 — Figure 9 As shown, a novel release structure for an injection pen is provided, wherein the lower end of the release block body 1 is provided with a slot, and the release block body 1 slides on the outer wall of the fixing unit 3 by means of the slot.

[0042] The working principle and beneficial effects of this embodiment are as follows: the release block body 1 can be locked and slid against the outer wall of the fixing unit 3 by the slot of the release block body 1, and the two baffles 1.1 of the release block body 1 can be pushed upward and inserted into the channel of the fixing unit 3.

[0043] The release block body 1's baffle 1.1 is aligned with the channel of the fixing unit 3, and the release block body 1 is pushed upward so that the baffle 1.1 is inserted into the channel. The boss of the injection unit 2 abuts against the side of the baffle 1.1. The channel limits the baffle 1.1, and the boss of the injection unit 2 cannot move; thus, the matching assembly and use are achieved. Specific implementation method three:

[0045] like Figure 1 — Figure 9 As shown, a novel release structure for an injection pen is provided, wherein the inner wall of the fixing unit 3 is connected to the injection unit 2 via the boss of the injection unit 2.

[0046] The working principle and beneficial effects of this embodiment are as follows: the boss on the injection unit 2 is attached to the inner wall of the fixing unit 3. The boss on the injection unit 2 is changed to meet different needs. The displacement of the attachment method is changed by adjusting the release block body 1. Specific implementation method four:

[0048] like Figure 1 — Figure 9 As shown, a novel release structure for an injection pen is provided, wherein the baffle 1.1 conforms to the protrusion of the injection unit 2 for blocking.

[0049] The upper guide slope 1.1.1 is attached to the protrusion of the injection unit 2.

[0050] The working principle and beneficial effects of this embodiment are as follows: When in use, after the protective shell pushes the release part to move a certain distance, the baffle 1.1 separates from the injection unit 2. At the same time, the pull-out inclined surface 1.2.1 on the release boss 1.2 contacts and pulls out the boss on the injection unit 2, thereby releasing the injection unit 2. Since it is a direct pull-out, the inevitability of triggering is guaranteed, thus ensuring the functionality and reliability of the product. Specific implementation method five:

[0052] like Figure 1 — Figure 9 As shown, a novel release structure for an injection pen is provided, wherein the rotating inclined surface 1.2.1 of the release boss 1.2 contacts and rotates with the boss on the injection unit 2.

[0053] The working principle and beneficial effects of this embodiment are as follows: after the baffle 1.1 separates from the injection unit 2, the rotating inclined surface 1.2.1 on the release boss 1.2 contacts and rotates with the boss on the injection unit 2, thereby releasing the injection unit 2. Specific implementation method six:

[0055] like Figure 1 — Figure 9 As shown, a novel release structure for an injection pen is provided, wherein a guide pin 400 is fixed inside the fixing unit 3, and a spring 200 is sleeved on the guide pin 400.

[0056] A fixing block 300 is engaged between the top end of the fixing unit 3 and the top end of the release block body 1;

[0057] The release block body 1 is assembled with the spring 200, the fixing block 300, the guide pin 400, the injection unit 2 and the fixing unit 3 to form an injection pen.

[0058] The working principle and beneficial effects of this embodiment are as follows: The specific assembly process is as follows:

[0059] Install the fixing unit 3 into the release block body 1, and as the fixing unit 3 is installed, the baffle 1.1 will not contact the channel; then put the fixing block 300 onto the fixing unit 3.

[0060] The two hooks of the pressing and fixing unit 3 are brought close together and pass through the through hole of the fixing block 300. Then the two hooks are released so that the hook slopes below the two hooks contact and engage with the groove slopes of the fixing block 300.

[0061] Place the guide pin 400 into the fixing unit 3, install the end of the guide pin 400 on the bottom of the inner wall of the fixing unit 3, and ensure that the guide pin 400 does not wobble, with the top of the guide pin 400 extending out of the fixing unit 3.

[0062] The center of the spring 200 is fitted into the guide pin 400. The spring 200 can be an elastic reset element such as urethane. The spring 200 is fitted onto the guide pin 400. One end of the spring 200 is connected to the end of the guide pin 400, and the other end extends out of the fixing unit 3. The length of the spring 200 in its free state is greater than the length of the guide pin 400.

[0063] The injection unit 2 is fitted onto the spring 200;

[0064] After pressing the injection unit 2, it passes through the fixing unit 3 and is rotated to hook the boss of the injection unit 2 onto the guide slope of the fixing unit 3.

[0065] Press the injection unit 2 so that the spring 200 abuts against the top of the inner wall of the injection unit 2. The protrusion of the injection unit 2 is aligned with the channel. As the injection unit 2 is pressed, the spring 200 is pre-compressed. The protrusion slides along the channel until it enters the fixed unit 3. Rotate the injection unit 2 so that the protrusion leaves the channel and hangs on the guide slope 7.

[0066] Push the release block body 1 upwards and insert the two baffles 1.1 of the release block body 1 into the channel of the fixing unit 3 to complete the assembly;

[0067] The baffle 1.1 of the release block body 1 is aligned with the channel 11 of the fixing unit 3, and the release block body 1 is pushed upward so that the baffle 1.1 is inserted into the channel 11. The boss abuts against the side of the baffle 1.1. The channel 11 limits the baffle 1.1 so that the first boss 1 cannot move, thus completing the assembly of the syringe structure.

[0068] The central axis along the length direction is set as the Z-axis. The installation direction of the release block body 1 is in the positive direction of the Z-axis, and the installation direction of the injection unit 2 is in the negative direction of the Z-axis. In use, the release block body 1 is moved in the positive direction of the Z-axis until the baffle 1.1 on the release block body 1 is completely out of the channel of the fixing unit 3. At this time, the boss of the injection unit 2 loses its limit. Under the action of the spring 200 and the guide slope of the fixing unit 3, the injection unit 2 rotates along the guide slope of the fixing unit 3. When the boss of the injection unit 2 rotates into the channel of the fixing unit 3, it begins to move in the negative direction of the Z-axis. When the injection unit 2 has completely moved out of the fixing unit 3, the spring 200 still maintains a certain force, which will push the fixing unit 3 to move in the positive direction of the Z-axis and collide with the subsequent parts, thus producing a sound. When the release block body 1 is reset (moving in the negative direction of the Z-axis), the hook slope on the fixing unit 3 slides relative to the groove slope, and the hook is compressed into the release block body 1. As the sliding hook 10 engages with the side of the release block body 1, protection is formed.

[0069] The above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model are also within the protection scope of the present utility model.

Claims

1. A novel release structure for an injection pen, characterized in that: The release block body (1) has a baffle (1.1) and a release boss (1.2) fixed on its inner wall. The upper end face of the baffle (1.1) is provided with an upper guide slope (1.1.1), and the lower end face of the release boss (1.2) is provided with a pull-out slope (1.2.1).

2. The novel release structure for an injection pen according to claim 1, characterized in that: The lower end of the release block body (1) is provided with a slot, and the release block body (1) slides on the outer wall of the fixing unit (3) through the slot limit.

3. A novel release structure for an injection pen according to claim 2, characterized in that: The inner wall of the fixed unit (3) is connected to the injection unit (2) via the boss of the injection unit (2).

4. A novel release structure for an injection pen according to claim 3, characterized in that: The baffle (1.1) is attached to the protrusion of the injection unit (2) to block it.

5. A novel release structure for an injection pen according to claim 4, characterized in that: The upper guide slope (1.1.1) is attached to the protrusion of the injection unit (2).

6. A novel release structure for an injection pen according to claim 3, characterized in that: The rotating inclined surface (1.2.1) of the release boss (1.2) contacts and rotates with the boss on the injection unit (2).

7. A novel release structure for an injection pen according to claim 2, characterized in that: The fixing unit (3) is fixed with a guide pin (400), and a spring (200) is sleeved on the guide pin (400).

8. A novel release structure for an injection pen according to claim 7, characterized in that: The two ends of the spring (200) are fixed in the injection unit (2) and the fixing unit (3), respectively.

9. A novel release structure for an injection pen according to claim 8, characterized in that: A fixing block (300) is engaged between the top end of the fixing unit (3) and the top end of the release block body (1).

10. A novel release structure for an injection pen according to claim 9, characterized in that: The release block body (1) forms an injection pen by being mounted with a spring (200), a fixing block (300), a guide pin (400), an injection unit (2), and a fixing unit (3).

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