Syringe and locking structure for a syringe
By introducing a locking structure into the syringe, using the cooperation of the arc-shaped block and the linkage protrusion, the movement of the hidden needle sleeve is prevented, thus solving the problem of syringe reuse and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU WANHAI MEDICAL INSTR CO LTD
- Filing Date
- 2025-03-11
- Publication Date
- 2026-06-16
AI Technical Summary
Existing syringes pose safety risks when reused, potentially leading to unpredictable harm such as infection.
A locking structure for syringes is designed, including an arc-shaped block and a linkage protrusion. Through the cooperation of the insert and the slot, the hidden needle sleeve is prevented from moving upward again after injection, thus avoiding the reuse of the syringe.
This effectively prevents the reuse of syringes, improves safety, and avoids the risk of secondary infection.
Smart Images
Figure CN224357857U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical machinery technology, specifically relating to syringes, and more particularly to a locking structure for syringes. Background Technology
[0002] To facilitate independent and convenient self-medication, self-medication systems or devices have become quite common. Injection pen therapy can be categorized into diabetes treatment, growth hormone therapy, osteoporosis treatment, fertility treatment, and other treatments.
[0003] In related technologies, an injection pen includes: a pen body, a graduated rotating cylinder, a pen cap, a medicine cartridge, and an injection head. The injection head is contained in a relatively sealed space by the pen cap and the pen body. To avoid accidental injury, the pen cap needs to be placed back on the pen body after use. This leads to the possibility of reusing the complete injection pen, which may cause uncertain harm to the human body, such as infection.
[0004] Therefore, how to prevent syringes from being reused is a technical problem that urgently needs to be solved in this field.
[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content
[0006] This disclosure provides at least a syringe and a locking structure for the syringe to solve the technical problem of reusing syringes.
[0007] In a first aspect, embodiments of this disclosure provide a syringe, comprising: a pen cap; a lower pen tube for fitting onto the pen cap; and a concealed needle sleeve disposed within the pen cap and the lower pen tube; wherein an inner cylinder is disposed below the lower pen tube, and at least one slot is disposed between the inner cylinder and the lower pen tube, and a locking structure is disposed within the slot; an insert is disposed on the concealed needle sleeve, and a protrusion is disposed on the inner wall of the insert; wherein during injection, the insert of the concealed needle sleeve is configured to move into the slot, and after injection, the protrusion drags the locking structure downward, and the locking structure abuts against the inner cylinder.
[0008] In one optional embodiment, the locking structure includes an arc-shaped block having an outer surface and an inner surface; the inner surface is fitted to the inner cylinder and the outer surface is provided with a connecting protrusion; the inner surface is provided with a stop protrusion; wherein, after injection, the protrusion pulls the arc-shaped block downward through the connecting protrusion, and the stop protrusion abuts against the bottom surface of the inner cylinder to prevent the hidden needle sleeve from continuing to move upward.
[0009] In one optional embodiment, limiting strips are provided on both sides of the arc-shaped block; wherein when the insert moves along the arc-shaped block, both sides of the insert are in contact with the limiting strips.
[0010] In one optional embodiment, the linkage protrusion is located at the lower end of the inner surface, and there are at least two linkage protrusions, which are spaced apart along the lower end of the inner surface.
[0011] In one alternative embodiment, the syringe includes an upper pen body tube, inside which a sleeve is disposed; the lower half of the sleeve extends into the lower pen body tube and abuts against the top surface of the concealed needle sleeve.
[0012] In one optional embodiment, the bottom surface of the sleeve and the top surface of the concealed needle sleeve are both planes.
[0013] In one optional embodiment, the width of the bottom surface of the sleeve is h1; the width of the top surface of the concealed needle sleeve is h2; wherein h1>h2.
[0014] Secondly, this embodiment also provides a locking structure for a syringe, including: an arc-shaped block having an outer surface and an inner surface; a connecting protrusion is provided on the outer surface near the upper position; a stop protrusion is provided on the bottom surface of the inner surface; wherein during injection, the insert on the hidden needle sleeve moves upward along the outer surface, and after injection, the protrusion pulls the arc-shaped block downward through the connecting protrusion until the stop protrusion slides out of the inner cylinder, and when the hidden needle sleeve moves upward again, the stop protrusion abuts against the bottom surface of the inner cylinder.
[0015] In one optional embodiment, limiting strips are provided on both sides of the arc-shaped block; wherein when the insert moves along the arc-shaped block, the two sides of the insert abut against the limiting strips.
[0016] In one optional embodiment, the top surface of the linkage protrusion and the bottom surface of the stop protrusion are both planes that mate with the protrusion.
[0017] In one optional embodiment, the top surface of the linkage protrusion and the bottom surface of the stop protrusion are both planes that mate with the protrusion.
[0018] The beneficial effects of this utility model are that it provides a syringe and a locking structure for the syringe. By setting the locking structure, the hidden needle sleeve abuts against the arc-shaped block when it moves upward during the first injection. When the hidden needle sleeve moves downward after the injection, it also drives the connecting protrusion downward. When the hidden needle sleeve moves upward again, it prevents the hidden needle sleeve from moving upward again, thereby avoiding the syringe from being injected again and solving the safety hazard of the syringe being reused.
[0019] 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 are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.
[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0022] Figure 1 A perspective view of the syringe configuration provided in an embodiment of this disclosure;
[0023] Figure 2 A cross-sectional view of the lower and upper pen barrels provided in an embodiment of this disclosure;
[0024] Figure 3 A perspective view of the pen body and locking structure in a separated state provided in an embodiment of this disclosure;
[0025] Figure 4 A cross-sectional view of the locking structure and the hidden needle sleeve provided in the embodiments of this disclosure;
[0026] Figure 5 A perspective view of the locking structure provided in an embodiment of this disclosure;
[0027] Figure 6 A perspective view of an injection pen provided in an embodiment of this disclosure;
[0028] Figure 7 This is a schematic diagram of the pre-injection locking structure and protrusion structure of the syringe provided in an embodiment of the present disclosure;
[0029] Figure 8 This is a schematic diagram of the locking structure and protrusion structure of the syringe during injection provided in an embodiment of the present disclosure;
[0030] Figure 9 A schematic diagram of the syringe locking structure and protrusion structure provided in an embodiment of this disclosure;
[0031] Figure 10 This is a schematic diagram of the locking structure and protrusion structure when the syringe needle sleeve moves upward again, as provided in an embodiment of this disclosure.
[0032] In the picture:
[0033] 1. Pen body; 11. Inner cylinder;
[0034] 2. Pen body;
[0035] 3. Pen cap;
[0036] 4. Hidden pin sleeve; 41. Insert strip; 42. Protrusion;
[0037] 5. Sleeve;
[0038] 6. Locking structure; 61. Arc-shaped block; 62. Outer surface; 63. Inner surface; 64. Linking convex strip; 65. Stopping convex strip; 66. Limiting strip. Detailed Implementation
[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0040] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.
[0041] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.
[0042] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.
[0043] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.
[0044] Research has revealed the following drawbacks of existing technologies: In related technologies, injection pens include: a pen body, a graduated rotating cylinder, a pen cap, a medicine cartridge, and an injection head. The injection head is contained within a relatively enclosed space by the pen cap and the pen body. To avoid accidental injury, the pen cap needs to be placed back on the pen body after use. This leads to the possibility of reusing the complete injection pen, which could potentially cause unpredictable harm to the human body, such as infection.
[0045] Therefore, how to prevent syringes from being reused is a technical problem that urgently needs to be solved in this field.
[0046] The shortcomings of the above solutions are the result of the utility model inventor's practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as contributions made by the utility model inventor to this disclosure.
[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0048] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0049] like Figures 1 to 10As shown, some embodiments provide a syringe including: an upper pen tube 2, a lower pen tube 1, and a pen cap 3. Specifically, the lower pen tube 1 is fitted onto the pen cap 3; a hidden needle sleeve 4 is disposed inside the pen cap 3 and the lower pen tube 1; wherein, an inner cylinder 11 is disposed below the lower pen tube 1, the inner cylinder 11 is disposed in the lower part of the bottom surface of the lower pen tube 1, the outer wall of the inner cylinder 11 and the inner wall of the lower pen tube 1 are fixed by connecting ribs, and slots 12 are formed between the connecting ribs and the outer wall of the inner cylinder 11 and the inner wall of the lower pen tube 1, that is, at least one slot 12 is provided between the inner cylinder 11 and the lower pen tube 1, and a locking structure 6 is provided in the slot 12.
[0050] Please see Figure 2 and combined Figures 5 to 10 The locking structure 6 includes an arc-shaped block 61, which has an outer surface 62 and an inner surface 63. The inner surface 63 is arranged to fit against the inner cylinder 11. The outer surface 62 is used to abut against the inner wall of the insert 41, and the inner surface 63 is used to abut against the outer wall of the inner cylinder 11. A connecting protrusion 64 is provided on the outer surface 62. The main function of the connecting protrusion 64 is to move downward with the protrusion 42. A stop protrusion 65 is provided on the inner surface 63. The main function of the stop protrusion 65 is to restrict the protrusion 42 from moving upward again. The connecting protrusion 64 is located at the lower end of the inner surface 63. There are at least two connecting protrusions 64, which are spaced apart along the lower end of the inner surface 63.
[0051] Please see Figure 2 and Figure 4 The hidden needle sleeve 4 is provided with an insert 41. When the hidden needle sleeve 4 moves upward, the insert 41 is used to move into the slot 12. In addition, a protrusion 42 is provided on the inner wall of the insert 41. The protrusion 42 is a triangular arc-shaped strip with a flat bottom surface. During injection, the insert 41 of the hidden needle sleeve 4 is configured to move into the slot 12. After injection, the protrusion 42 drags the locking structure 6 downward. When the hidden needle sleeve 4 moves upward again, the locking structure 6 is locked on the bottom surface of the lower pen body 1 to prevent the hidden needle sleeve 4 from moving to the top surface of the slot 12.
[0052] Please see Figures 5 to 10 Specifically, before injection, the protrusion 42 is located below the slot 12. During injection, the protrusion 42 moves upward. After injection, the protrusion 42 pulls the arc block 61 downward through the linkage protrusion 64. When the hidden needle sleeve 4 moves upward again, the stop protrusion 65 abuts against the bottom surface of the lower pen tube 1 to prevent the hidden needle sleeve 4 from moving upward. That is, when the hidden needle sleeve 4 moves upward again, the inner surface 63 moves upward along the inner cylinder 11 of the lower pen tube 1 until the stop protrusion 65 abuts against the bottom surface of the lower pen tube 1 to prevent the hidden needle sleeve 4 from moving upward.
[0053] Please see Figure 5As the insert 41 moves into the slot 12, when the insert 41 begins to abut against the outer surface 62 of the arc block 61, the two sides of the slot 41 need to be limited. Therefore, limit strips 66 are provided on both sides of the arc block 61. When the insert 41 moves along the arc block 61, the two sides of the insert 41 abut against the limit strips 66.
[0054] Please participate Figure 1 and combined Figure 2 and Figure 6 The system includes an upper pen tube 2, within which a sleeve 5 is disposed. The lower half of the sleeve 5 extends into the lower pen tube 1 and abuts against the top surface of the hidden needle sleeve 4 during injection. To improve the stability of the abutment between the hidden needle sleeve 4 and the sleeve 5 during injection, both the bottom surface of the sleeve 5 and the top surface of the hidden needle sleeve 4 are made planar. The width of the bottom surface of the sleeve 5 is h1; the width of the top surface of the hidden needle sleeve 4 is h2; where h1 > h2.
[0055] Please see Figure 2 and combined Figures 5 to 10 Some embodiments also provide a locking structure for a syringe, including: an arc-shaped block 61 having an outer surface 62 and an inner surface 63; the outer surface 62 is used to abut against the inner wall of the insert 41, and the inner surface 63 is used to abut against the outer wall of the inner cylinder 11; a connecting protrusion 64 is provided near the upper part of the outer surface 62; a stop protrusion 65 is provided at the bottom of the inner surface 63; the main function of the connecting protrusion 64 is to move downward with the protrusion 42; the main function of the stop protrusion 65 is to restrict the protrusion 42 from moving upward again.
[0056] Please see Figures 5 to 10 Specifically, before injection, the protrusion 42 is located below the slot 12. During injection, the insert 41 on the hidden needle sleeve 4 moves upward along the outer surface 62. After injection, the protrusion 42 pulls the arc block 61 downward through the connecting protrusion 64. When the hidden needle sleeve 4 moves upward again, the inner surface 63 moves upward along the inner cylinder 11 of the lower pen tube 1 until the stop protrusion 65 abuts against the bottom surface of the lower pen tube 1 to prevent the hidden needle sleeve 4 from moving upward further. That is, during injection, the insert 41 on the hidden needle sleeve 4 moves upward along the outer surface 62. After injection, the protrusion 42 pulls the arc block 61 downward through the connecting protrusion 64 until the stop protrusion 65 slides out of the inner cylinder 11. When the hidden needle sleeve 4 moves upward again, the stop protrusion 65 abuts against the bottom surface of the inner cylinder 11.
[0057] Please see Figure 5As the insert 41 moves into the slot 12, when it begins to abut against the outer surface 62 of the arc-shaped block 61, the two sides of the slot 41 need to be limited. Therefore, limit strips 66 are provided on both sides of the arc-shaped block 61; when the insert 41 moves along the arc-shaped block 61, the two sides of the insert 41 abut against the limit strips 66. The top surface of the connecting protrusion 64 and the bottom surface of the stop protrusion 65 are both planes that mate with the protrusion 42.
[0058] In summary, by setting the locking structure 6, the hidden needle sleeve 4 abuts against the arc-shaped block 61 when it moves upward during the first injection. After the injection, when the hidden needle sleeve 4 moves downward, it also drives the connecting protrusion 64 downward. The bottom surface of the stop protrusion 65 abuts against the bottom surface of the lower pen tube 1, preventing the hidden needle sleeve 4 from moving upward again. This avoids the syringe from being injected again and solves the safety hazard of the syringe being reused.
[0059] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0060] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.
[0061] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A syringe, characterized in that, include: Pen cap (3); The lower pen body (1) is used to fit onto the pen cap (3); The hidden needle sleeve (4) is set inside the pen cap (3) and the lower pen body tube (1); Among them, an inner cylinder (11) is provided below the lower pen body tube (1), and at least one slot (12) is provided between the inner cylinder (11) and the lower pen body tube (1), and a locking structure (6) is provided in the slot (12). The concealed needle sleeve (4) is provided with an insert (41), and the inner wall of the insert (41) is provided with a protrusion (42); wherein During injection, the insert (41) of the hidden needle sleeve (4) is configured to move into the slot (12). After injection, the protrusion (42) drags the locking structure (6) downward, and the locking structure (6) abuts against the inner cylinder (11).
2. The syringe as described in claim 1, characterized in that, The locking structure (6) includes an arc-shaped block (61), which has an outer surface (62) and an inner surface (63); the inner surface (63) is arranged to fit the inner cylinder (11); The outer surface (62) is provided with a connecting protrusion (64); The inner surface (63) is provided with a stop protrusion (65); After injection, the protrusion (42) pulls the arc-shaped block (61) downward through the linkage protrusion (64), and the stop protrusion (65) abuts against the bottom surface of the inner cylinder (11) to prevent the hidden needle sleeve (4) from continuing to move upward.
3. The syringe as described in claim 2, characterized in that, Limiting strips (66) are provided on both sides of the arc-shaped block (61); wherein When the insert (41) moves along the arc block (61), both sides of the insert (41) are in contact with the limiting strip (66).
4. The syringe as described in claim 2, characterized in that, The linkage protrusion (64) is located at the lower end of the inner surface (63), and there are at least two linkage protrusions (64) that are spaced apart along the lower end of the inner surface (63).
5. The syringe as described in claim 4, characterized in that, Includes an upper pen body tube (2), and a sleeve (5) is provided inside the upper pen body tube (2); The lower half of the sleeve (5) extends into the lower pen tube (1) and abuts against the top surface of the hidden needle sleeve (4).
6. The syringe as described in claim 5, characterized in that, The bottom surface of the sleeve (5) and the top surface of the hidden needle sleeve (4) are both planes.
7. The syringe as claimed in claim 6, characterized in that, The width of the bottom surface of the sleeve (5) is h1; The width of the top surface of the hidden needle sleeve (4) is h2; where h1>h2.
8. A locking structure for a syringe, characterized in that, include: Arc-shaped block (61), the arc-shaped block (61) having an outer surface (62) and an inner surface (63); The outer surface (62) is provided with a connecting protrusion (64) near the upper position; A stop protrusion (65) is provided at the bottom surface of the inner surface (63); wherein During injection, the insert (41) on the hidden needle sleeve (4) moves upward along the outer surface (62). After injection, the protrusion (42) pulls the arc block (61) downward through the connecting protrusion (64) until the stop protrusion (65) slides out of the inner cylinder (11). When the hidden needle sleeve (4) moves upward again, the stop protrusion (65) abuts against the bottom surface of the inner cylinder (11).
9. The locking structure as described in claim 8, characterized in that, Limiting strips (66) are provided on both sides of the arc-shaped block (61); wherein When the insert (41) moves along the arc block (61), the two sides of the insert (41) abut against the limiting strip (66).
10. The locking structure as described in claim 8, characterized in that, The top surface of the connecting protrusion (64) and the bottom surface of the stop protrusion (65) are both planes that cooperate with the protrusion (42).