A medical injection pen structure capable of adjusting injection depth

Abstract

The utility model relates to injection pen technical field, concretely relates to a kind of medical injection pen structure of adjustable injection depth, including injection pen body, limit cylinder, limit board, screw ring two, injection pen body can carry out the injection of drug, the needle cover is provided in the end of injection pen body, limit cylinder is arranged in the side of injection pen body, the needle cover is located inside limit cylinder, limit board is arranged in one end of limit cylinder.In the utility model, by the screwing connection of limit cylinder inner side and screw ring two side, limit cylinder position on injection pen body can be adjusted according to requirement, injection depth is adjusted, when injection, needle on needle cover can be prevented to continue to penetrate into skin by limit cylinder and limit board, to control injection depth, it is favorable to reduce the operation requirement of patient injection, try to avoid penetration too deep or too shallow when injection, it is favorable to inject drug more accurately to corresponding tissue layer.

Description

Technical Field

[0001] This utility model relates to the field of injection pen technology, specifically a medical injection pen structure that can adjust the injection depth. Background Technology

[0002] A medical injection pen is a portable, disposable, or reusable medical device used for subcutaneous drug injection. Injection pens offer advantages such as simple operation, accurate dosage, and ease of use. Patients can administer injections themselves without the assistance of professional medical personnel, improving the convenience and effectiveness of treatment. However, the current structure of medical injection pens, with its fixed needle length, requires patients to control the needle insertion depth according to their own injection needs. This places certain demands on the patient's skill, and due to insufficient experience, the injection depth may be too deep or too shallow, failing to accurately target the corresponding tissue layer and affecting drug absorption. Furthermore, excessively deep injections may increase patient pain and discomfort. Utility Model Content

[0003] The purpose of this invention is to provide a medical injection pen structure that can adjust the injection depth, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A medical injection pen structure with adjustable injection depth includes an injection pen body, a limiting cylinder, a limiting plate, and a screw ring.

[0006] The injection pen body is capable of injecting drugs, and the end of the injection pen body is provided with a needle cap;

[0007] The limiting cylinder is located on one side of the injection pen body, and the needle sleeve is located inside the limiting cylinder;

[0008] The limiting plate is located at one end of the limiting cylinder;

[0009] The second screw ring is fixedly connected to the side of the injection pen body, and the inner side of the limiting cylinder is screwed to the side of the second screw ring.

[0010] Furthermore, a screw ring is fixedly connected to the side of the limiting cylinder near the limiting plate, and the screw ring is equipped with a screw cap.

[0011] Furthermore, the inner side of the limiting cylinder is fixedly connected to two fixed seats, and the side of the limiting plate is fixedly connected to a sliding rod that is slidably connected to the inner side of the adjacent fixed seat.

[0012] Furthermore, a spring is fixedly connected to the inner side of the fixed base and to the end of the adjacent sliding rod.

[0013] Preferably, a positioning ring is slidably connected to the inner side of the limiting plate, and a connecting plate that is slidably connected to the two sliding rods is fixedly connected to the side of the positioning ring.

[0014] Furthermore, a fixing ring is fixedly connected to the side of the sliding rod, and springs that are fixedly connected to the adjacent fixing rings are fixedly connected to the top and bottom of the side of the connecting plate.

[0015] Furthermore, the top and bottom sides of the connecting plate are fixedly connected to fixed rods that are slidably connected to the sides of adjacent sliding rods, and the inner side of the fixed rod is slidably connected to the side of the adjacent fixed ring.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. After the medication is placed inside the injection pen body and the injection dosage is adjusted, and the needle sleeve is screwed onto the injection pen body, the limiting sleeve can be placed on the injection pen body and screwed onto the second screw ring. The second screw ring connects the limiting sleeve to the injection pen body. The position of the limiting sleeve on the injection pen body can be adjusted as needed to adjust the injection depth. During injection, the limiting plate is attached to the patient's skin. When the limiting plate and the end of the limiting sleeve come into contact, the limiting sleeve and the limiting plate prevent the needle on the needle sleeve from continuing to penetrate the skin, thereby controlling the injection depth. This helps reduce the operational requirements for the patient during injection, avoids injections that are too deep or too shallow, and allows for more accurate injection of the medication into the corresponding tissue layer, which is beneficial for drug absorption and avoids excessive pain caused by excessively deep injections. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a medical injection pen with adjustable injection depth according to this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the limiting cylinder in this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the fixing base in this utility model;

[0021] Figure 4 This is a schematic diagram of the positioning ring structure in this utility model;

[0022] Figure 5 This is a schematic diagram of the screw-on cap structure in this utility model.

[0023] In the diagram: 1. Injection pen body; 11. Needle tip sleeve; 2. Limiting cylinder; 21. Engaging ring one; 3. Limiting plate; 31. Sliding rod; 32. Fixing ring; 4. Engaging ring two; 5. Fixing base; 51. Spring one; 6. Positioning ring; 61. Connecting plate; 62. Fixing rod; 63. Spring two; 7. Engaging cap. Detailed Implementation

[0024] 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 protection scope of the present utility model.

[0025] Please see Figure 1-3 In this embodiment of the present invention, a medical injection pen structure capable of adjusting injection depth includes an injection pen body 1, a limiting cylinder 2, a limiting plate 3, and a rotating ring 4.

[0026] The injection pen body 1 is capable of injecting drugs. A needle sleeve 11 is provided at the end of the injection pen body 1. A limiting cylinder 2 is provided on one side of the injection pen body 1. The needle sleeve 11 is located inside the limiting cylinder 2. The limiting cylinder 2 is provided on the side of the injection pen body 1 corresponding to the needle sleeve 11. A limiting plate 3 is provided at one end of the limiting cylinder 2. A screw ring 4 is fixedly connected to the side of the injection pen body 1. The inner side of the limiting cylinder 2 is screwed to the side of the screw ring 4. The limiting cylinder 2 can be connected to the injection pen body 1 through the screw ring 4 and the position of the limiting cylinder 2 relative to the injection pen body 1 is restricted. Two fixing seats 5 are fixedly connected to the inner side of the limiting cylinder 2. A sliding rod 31 is fixedly connected to the side of the limiting plate 3 and is slidably connected to the inner side of the adjacent fixing seat 5. The limiting plate 3 is connected to the limiting cylinder 2 through the sliding rod 31 and the fixing seat 5.

[0027] Specifically, after screwing the needle cap 11 onto the pen body 1 and completing other pre-injection preparations, the limiting sleeve 2 can be placed onto the pen body 1, screwing it onto the screw ring 4. The limiting sleeve 2 can rotate relative to the pen body 1, and its position relative to the pen body 1 can be adjusted as needed. During injection, as the needle on the needle cap 11 pierces the skin, the limiting plate 3 can adhere to the patient's skin. After piercing, the pen body 1 and the limiting sleeve 2 can continue to move towards the limiting plate 3, causing part of the sliding rod 31 to retract into the fixing seat 5. When the position plate 3 contacts the end of the limiting cylinder 2, the limiting cylinder 2 can be prevented from continuing to move towards the patient's skin by the limiting plate 3, thereby preventing the pen body 1 and the needle sheath 11 from continuing to move. In this way, the needle on the needle sheath 11 can be prevented from continuing to penetrate the skin by the limiting cylinder 2 and the limiting plate 3, thereby controlling the injection depth. Then the drug can be injected into the corresponding tissue layer. After the injection is completed, the needle on the needle sheath 11 is pulled out and the bleeding is stopped. The limiting cylinder 2 can be unscrewed from the screw ring 4 and removed from the pen body 1. Then the needle sheath 11 can be removed from the pen body 1 and discarded.

[0028] When retrieving medication, medical staff can determine the optimal injection depth for each patient based on their body size and injection requirements. This allows patients to adjust the position of the limiting cylinder 2 according to their optimal injection depth when self-injecting, thus reducing the demands on the patient's technique and minimizing the risk of injections that are too deep or too shallow. This ensures more precise injection into the appropriate tissue layer, promoting drug absorption and minimizing pain caused by excessively deep injections, thereby improving the patient's injection experience.

[0029] A corresponding scale can be set on the body 1 of the injection pen so that the scale corresponds to the end of the limiting cylinder 2 away from the limiting plate 3, which makes it easier for the patient to adjust the position of the limiting cylinder 2 more accurately.

[0030] Example 1

[0031] like Figure 3 As shown, in this embodiment, a spring 51 is fixedly connected to the inner side of the fixed base 5 and to the end of the adjacent sliding rod 31.

[0032] In practice, the sliding rod 31 can be connected to the inside of the fixed seat 5 by the spring 51, and the position of the sliding rod 31 can be maintained by the spring 51. After the limiting plate 3 is attached to the patient's skin, when the pen body 1 and the limiting cylinder 2 continue to move, the limiting cylinder 2 can drive the fixed seat 5 to move, thereby causing the spring 51 to contract.

[0033] like Figure 3-4As shown, in this embodiment, a positioning ring 6 is slidably connected to the inner side of the limiting plate 3. The positioning ring 6 can move inside the limiting plate 3. A connecting plate 61 is fixedly connected to the side of the positioning ring 6 and is slidably connected to the two sliding rods 31. A fixing ring 32 is fixedly connected to the side of the sliding rods 31. A spring 63 is fixedly connected to the top and bottom of the side of the connecting plate 61 and is fixedly connected to the adjacent fixing ring 32. The fixing ring 32 can maintain the position of the connecting plate 61 through the spring 63, thereby maintaining the position of the positioning ring 6. A fixing rod 62 is fixedly connected to the top and bottom of the side of the connecting plate 61 and is slidably connected to the side of the adjacent sliding rod 31. The inner side of the fixing rod 62 is slidably connected to the side of the adjacent fixing ring 32. The connecting plate 61 and the fixing rod 62 can move along the sliding rod 31.

[0034] In practice, during injection, the positioning ring 6 can be placed against the patient's skin first. When the injection pen body 1 and the limiting cylinder 2 are moved towards the limiting plate 3, the fixing seat 5 can push the sliding rod 31 and the limiting plate 3 to move through the spring 51, thereby moving the limiting plate 3 towards the patient's skin and making the limiting plate 3 adhere to the patient's skin. The fixing ring 32 can move towards the connecting plate 61, causing the spring 63 to contract. Then, the injection pen body 1 and the limiting cylinder 2 can continue to move towards the patient's skin, allowing the needle on the needle sleeve 11 to pass through the inside of the positioning ring 6 and pierce the patient's skin. After the limiting cylinder 2 contacts the limiting plate 3, it can prevent the injection pen body 1 and the limiting cylinder 2 from moving further, thereby controlling the injection depth. The diameter of the positioning ring 6 is relatively small. Before piercing, the protrusion of the positioning ring 6 relative to the limiting plate 3 makes it easy for the patient to accurately understand the injection position.

[0035] Example 2

[0036] Based on Example 1, such as Figure 5 As shown, in this embodiment, a screw ring 21 is fixedly connected to the side of the limiting cylinder 2 near the limiting plate 3, and the screw ring 21 is equipped with a screw cap 7.

[0037] In practice, after the injection is completed, the needle cap 11 is removed from the pen body 1 and discarded. When the pen body 1 needs to be stored away, the limiting cylinder 2 can be screwed back onto the second screw ring 4, so that the limiting cylinder 2 is reconnected to the pen body 1. Then, the screw cap 7 can be put on the limiting plate 3, and the limiting plate 3 and the positioning ring 6 can be pushed towards the limiting cylinder 2 by the screw cap 7. At this time, the screw cap 7 can be screwed onto the first screw ring 21, and the end of the limiting cylinder 2 and the limiting plate 3 can be blocked by the screw cap 7. Then the pen body 1 can be stored away.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A medical injection pen structure with adjustable injection depth, characterized in that, include: The injection pen body (1) is capable of injecting drugs, and a needle cap (11) is provided at the end of the injection pen body (1). The limiting cylinder (2) is located on one side of the pen body (1) of the injection pen, and the needle sleeve (11) is located inside the limiting cylinder (2); A limiting plate (3) is set at one end of the limiting cylinder (2); The second screw ring (4) is fixedly connected to the side of the pen body (1) of the injection pen, and the inner side of the limiting cylinder (2) is screwed to the side of the second screw ring (4).

2. The medical injection pen structure with adjustable injection depth according to claim 1, characterized in that, A screw ring (21) is fixedly connected to the side of the limiting cylinder (2) near the limiting plate (3), and the screw ring (21) is equipped with a screw cap (7).

3. The medical injection pen structure with adjustable injection depth according to claim 1, characterized in that, The inner side of the limiting cylinder (2) is fixedly connected to two fixed seats (5), and the side of the limiting plate (3) is fixedly connected to a sliding rod (31) that is slidably connected to the inner side of the adjacent fixed seat (5).

4. The medical injection pen structure with adjustable injection depth according to claim 3, characterized in that, A spring (51) is fixedly connected to the inner side of the fixed base (5) and to the end of the adjacent sliding rod (31).

5. The medical injection pen structure with adjustable injection depth according to claim 3, characterized in that, The inner side of the limiting plate (3) is slidably connected to a positioning ring (6), and the side of the positioning ring (6) is fixedly connected to a connecting plate (61) that is slidably connected to two sliding rods (31).

6. The medical injection pen structure with adjustable injection depth according to claim 5, characterized in that, A fixing ring (32) is fixedly connected to the side of the sliding rod (31), and springs (63) are fixedly connected to the top and bottom of the side of the connecting plate (61) and are fixedly connected to the adjacent fixing ring (32).

7. The medical injection pen structure with adjustable injection depth according to claim 6, characterized in that, The top and bottom sides of the connecting plate (61) are fixedly connected to a fixed rod (62) that is slidably connected to the side of the adjacent sliding rod (31), and the inner side of the fixed rod (62) is slidably connected to the side of the adjacent fixed ring (32).

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