Safety syringe needle for insulin pen
Through the coordinated design of the guide protrusion and the guide rail, the needle core of the insulin injection needle is automatically hidden, which solves the problem of insufficient safety protection in the prior art, simplifies the structure and reduces the production cost.
Patent Information
- Application Number
- CN202422233208.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-09-12
AI Technical Summary
Existing insulin injection needles lack a safety protection mechanism after use, which can easily cause accidental injuries and cross infection. They are also complex in structure and difficult to assemble.
The matching design of the guide protrusion and the guide rail is adopted to make the sleeve slide up and down along the central axis. The extension and retraction of the needle core are realized by the action of the spring to avoid the needle core from resetting. The sliding design of the guide protrusion and the N-shaped guide rail is used to prevent secondary use.
The needle core is automatically hidden, accidental injury and cross infection are avoided, the structure is simple, the operation is convenient, the cost is low, and the problem of complex assembly is avoided.
Smart Images
Figure CN223336555U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a safety injection needle for an insulin pen. Background Art
[0002] Diabetes is a common chronic disease. In daily treatment, insulin injection is one of the key methods for controlling blood sugar. Currently, common insulin injection needles typically consist of a needle hub, a needle body, and an outer protective casing. Before use, the protective casing must be removed to expose the needle body. After use, since the needle body is completely exposed and lacks a safety mechanism, it can easily cause accidental injury to oneself or others, as well as cross-infection.
[0003] To address the above issues, Application No. 2019223509724 discloses a safe insulin injection needle, comprising an inner shell, a protective sleeve, a locking ring, a spring, a needle body, and a needle holder. After the injection is completed, the needle body automatically hides and prevents accidental exposure, thus preventing injury to personnel and preventing cross-infection. However, this technical solution has a relatively complex structural design, numerous parts, and complicated assembly.
[0004] Therefore, in response to the technical problems described above, the applicant has researched and designed a safety injection needle for an insulin pen that is simple in structure and safe in operation. Utility Model Content
[0005] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a safety injection needle for an insulin pen. The purpose is to enable the sleeve to slide up and down on the needle seat along the direction of the central axis through the cooperation of the guide protrusion and the guide rail to achieve the technical effect of exposing and retracting the needle core, thereby objectively solving the technical problem of the complex structure of the existing insulin injection needle protection scheme.
[0006] In order to solve the above technical problems, the technical solution provided by the present utility model is as follows: a safety injection needle for an insulin pen, comprising a needle seat, a spring, and a sleeve arranged coaxially;
[0007] The needle seat is cylindrical, with a needle core in the center. The upper end of the needle seat is fixedly connected to the insulin pen through a thread. The outer wall of the needle seat is provided with protrusions on both sides, and guide protrusions are provided on the front and rear sides of the outer wall.
[0008] The sleeve is sleeved on the outer ring of the needle seat, and a needle core hole is provided at its lower end for the needle core to pass through. The inner wall of the sleeve is symmetrically provided with slideways, and the inner wall is symmetrically provided with guide rails. The guide rails are slidably engaged with the guide protrusions, and the slideways are slidably engaged with the protrusions.
[0009] The spring is arranged inside the needle seat, with its upper end in contact with the needle seat and its lower end in contact with the sleeve. The spring is used to open the needle seat and the sleeve.
[0010] Furthermore, the guide rail is N-shaped, comprising a vertically arranged long guide rail, a short guide rail and an inclined guide rail arranged obliquely. One end of the inclined guide rail is connected to the long guide rail, and the other end is connected to the short guide rail. The guide protrusion slides along the long guide rail, the inclined guide rail and the short guide rail.
[0011] Furthermore, a spring piece 1 is provided on the upper side of the inclined guide rail near one end of the long guide rail, and the spring piece 1 is provided flush with the inclined guide rail. A spring piece 2 is provided on the upper part of the short guide rail near one end of the inclined guide rail, and the spring piece 2 is provided flush with the short guide rail.
[0012] The advantages of this invention over existing technologies are that, through the cooperation of the guide protrusion and the guide rail, the sleeve slides up and down along the central axis under the action of the spring, allowing the needle core on the needle holder to extend and retract into the sleeve. After use, the needle core cannot be reset, thus preventing the needle from being reused and thus preventing cross infection. The invention has a simple structural design and is easy to manufacture. The main operating component is a spring, which has low manufacturing cost, simple operation, and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The utility model is a structural schematic diagram of a safety injection needle for an insulin pen.
[0014] Figure 2 The utility model is a structural schematic diagram of a needle seat in a safety injection needle of an insulin pen.
[0015] Figure 3 The utility model is a structural schematic diagram of a guide rail in a safety injection needle of an insulin pen.
[0016] Figure 4 The utility model is a top view of a sleeve in a safety injection needle of an insulin pen.
[0017] As shown in the figure: 1. Needle seat, 101. Protrusion, 102. Guide protrusion, 103. Internal thread, 2. Spring, 3. Sleeve, 301. Needle core hole, 302. Slide, 4. Needle core, 5. Guide rail, 501. Long guide rail, 502. Oblique guide rail, 503. Short guide rail, 504. Shrapnel 1, 505. Shrapnel 2. DETAILED DESCRIPTION
[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0019] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the utility model is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.
[0020] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0021] In the description of the embodiments of the present invention, “a plurality of” means at least 2.
[0022] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0023] Example 1:
[0024] In conjunction with the accompanying drawings, a safety injection needle for an insulin pen includes a needle seat 1, a spring 2, and a sleeve 3 that are coaxially arranged;
[0025] The needle seat 1 is cylindrical, with a needle core 4 at its center. The upper end of the needle seat 1 is fixedly connected to the insulin pen through a thread. Both sides of the outer wall of the needle seat 1 are provided with protrusions 101, and the front and rear sides of the outer wall are provided with guide protrusions 102.
[0026] The sleeve 3 is sleeved on the outer ring of the needle seat 1, and a needle core hole 301 is provided at its lower end for the needle core 4 to pass through. The inner wall of the sleeve 3 is symmetrically provided with slideways 302, and the inner wall is symmetrically provided with guide rails 5. The guide rails 5 are slidably engaged with the guide protrusions 102, and the slideways 302 are slidably engaged with the protrusions 101.
[0027] The spring 2 is arranged inside the needle seat 1, with its upper end in contact with the needle seat 1 and its lower end in contact with the sleeve 3. The spring 2 is used to open the needle seat 1 and the sleeve 3.
[0028] A preferred implementation of this embodiment is that the guide rail 5 is N-shaped, comprising a vertically arranged long guide rail 501, a short guide rail 503, and an inclined guide rail 502. One end of the inclined guide rail 502 is connected to the long guide rail 501, and the other end is connected to the short guide rail 503. The guide protrusion 102 slides along the long guide rail 501, the inclined guide rail 502, and the short guide rail 503. The inclined guide rail 502 is provided with a spring piece 1 504 on the upper side near one end of the long guide rail 501. The spring piece 1 504 is flush with the inclined guide rail 502. The short guide rail 503 is provided with a spring piece 2 505 on the upper side near one end of the inclined guide rail 502. The spring piece 2 505 is flush with the short guide rail 503. The inclined guide rail is preferably designed in a thick bottom and thin top manner, with its lower end connected to the lower end of the long guide rail and the thin end of the inclined guide rail connected to the upper end of the short guide rail. The thick bottom and thin top configuration makes it easier for the guide protrusion to not return along the original path.
[0029] During implementation, the spring forces the guide protrusion to rest at the top of the long guide rail. Pressing the sleeve causes the guide protrusion to slide downward along the long guide rail, pushing spring plate 1 to the bottom of the long guide rail. Spring plate 1 then automatically returns to a position flush with the inclined guide rail. At this point, the needle core passes through the core hole, allowing insulin injection.
[0030] After the injection is complete, release the sleeve, allowing it to move downward under the action of the spring. The guide protrusion, guided by spring one, slides along the inclined track, pushing spring two aside and sliding to the bottom of the track. The combination of the guide protrusion and the N-shaped track prevents the sleeve from resetting, effectively preventing the needle from being reused and preventing cross-infection.
[0031] A preferred implementation of this embodiment is that the slideway 302 is vertically arranged, and cooperates with the protrusion 101 to prevent the sleeve 3 from rotating left and right.
[0032] In a preferred embodiment of this embodiment, the inner circle of the upper end of the needle seat 1 is provided with an internal thread 103, and the internal thread 103 is used for threaded fixed connection with the insulin pen. The upper end of the needle core 4 passes through the needle seat 1 and is connected to the needle on the insulin pen.
[0033] During the specific implementation of the utility model, the needle seat is rotatably sleeved on the insulin pen and is fixedly connected by threads. When the needle seat is rotatably sleeved on the insulin pen, the needle core will be inserted into the needle tip of the insulin pen and connected therewith, making it easy to guide insulin from the insulin pen to the needle core.
[0034] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.
Claims
1. A safety injection needle for an insulin pen, characterized in that: It includes a needle seat, a spring and a sleeve that are coaxially arranged; The needle seat is cylindrical, with a needle core in the center. The upper end of the needle seat is fixedly connected to the insulin pen through a thread. The outer wall of the needle seat is provided with protrusions on both sides, and guide protrusions are provided on the front and rear sides of the outer wall. The sleeve is sleeved on the outer ring of the needle seat, and a needle core hole is provided at its lower end for the needle core to pass through. The inner wall of the sleeve is symmetrically provided with slideways, and the inner wall is symmetrically provided with guide rails. The guide rails are slidably engaged with the guide protrusions, and the slideways are slidably engaged with the protrusions. The spring is arranged inside the needle seat, with its upper end in contact with the needle seat and its lower end in contact with the sleeve. The spring is used to open the needle seat and the sleeve.
2. The insulin pen safety injection needle according to claim 1, characterized in that: The guide rail is N-shaped and includes a vertically arranged long guide rail, a short guide rail and an inclined guide rail. One end of the inclined guide rail is connected to the long guide rail, and the other end is connected to the short guide rail. The guide protrusion slides along the long guide rail, the inclined guide rail and the short guide rail.
3. The insulin pen safety injection needle according to claim 2, characterized in that: A spring piece 1 is provided on the upper side of the inclined guide rail near one end of the long guide rail, and the spring piece 1 is provided flush with the inclined guide rail. A spring piece 2 is provided on the upper part of the short guide rail near one end of the inclined guide rail, and the spring piece 2 is provided flush with the short guide rail.
4. The insulin pen safety injection needle according to claim 3, characterized in that: The slideway is vertically arranged and cooperates with the protrusion to prevent the sleeve from shaking left and right.
5. The insulin pen safety injection needle according to claim 4, characterized in that: The inner circle of the upper end of the needle seat is provided with an internal thread, and the internal thread is used for fixed connection with the insulin pen thread.
6. The insulin pen safety injection needle according to claim 5, characterized in that: The upper end of the needle core passes through the needle seat and is connected with the needle on the insulin pen.