Injection needle and injection device capable of preventing blood vessel from being punctured
By using a dual-needle structure, the second needle is inserted and then withdrawn, while the first needle is used for injection. This solves the problem of injection needles puncturing blood vessels and reduces tissue damage and contamination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-31
AI Technical Summary
Existing injection needles are prone to puncturing blood vessels when puncturing tissue, leading to tissue damage and contamination of the injection solution.
It adopts a double-needle structure. The second needle is used for puncture, and the first needle is a blunt needle used for injection. By controlling the movement sequence, the first needle is injected after the second needle is withdrawn from the tissue, which reduces tissue damage and avoids contamination.
It effectively reduces tissue damage and injection fluid contamination, improving the safety of the injection process.
Smart Images
Figure CN224056394U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of syringe technology, in particular to a blood vessel puncture-preventing injection needle and a syringe device. BACKGROUND
[0002] The tip of the injection needle used in the clinic is generally a sharp bevel. When the injection needle is inserted into the tissue, it first punctures the tissue membrane and then enters the inside of the tissue. The tissue membrane has a certain toughness and is relatively difficult to puncture. The existing injection needle is beneficial to puncturing the tissue membrane, but when the injection is performed, the sharp bevel tip remains in the tissue and is likely to cause the rupture of the tissue capillary and the damage of the tissue. After the injection liquid is pushed out, it is also easy to be contaminated by blood or the residual tissue at the sharp end. CONTENT OF THE INVENTION
[0003] The present application provides a blood vessel puncture-preventing injection needle and a syringe device, which can reduce the damage to the tissue and is not easy to contaminate the injection liquid.
[0004] The present application is implemented as follows:
[0005] In a first aspect, the present application provides a blood vessel puncture-preventing injection needle, comprising a first needle body and a second needle body, the first needle body is arranged in the second needle body, the second needle body has a sharp end for puncture, and the first needle body is a blunt needle for injection.
[0006] The first needle body can move along the axial direction of the second needle body and can move out of the sharp end of the second needle body. The second needle body can move along the length direction of the first needle body and retract in the direction away from the sharp end.
[0007] In a possible implementation, the outer surface of the tip is a convex curved surface, and the side wall of the tip is provided with a liquid outlet.
[0008] In a possible implementation, the sharp end of the second needle body is a bevel.
[0009] In a second aspect, the present application provides a syringe device, comprising a fixed barrel, an injection barrel and the blood vessel puncture-preventing injection needle of the first aspect.
[0010] One end of the fixed barrel is provided with a mounting seat, the second needle body is mounted in the mounting seat, and the mounting seat and the fixed barrel are slidably connected and can move along the length direction of the fixed barrel.
[0011] The first needle body is mounted on the injection cylinder, and an inner cavity of the first needle body is in communication with an inside of the injection cylinder, a push rod is mounted in the injection cylinder, and the push rod can push injection liquid in the injection cylinder out of the first needle body; the injection cylinder is arranged in the fixed cylinder and can move along a length direction of the fixed cylinder.
[0012] In a possible implementation, the fixed cylinder is provided with a first mounting opening, the injection cylinder is connected with a push rod, the push rod extends out of the first mounting opening and can move along the length direction of the fixed cylinder relative to the first mounting opening.
[0013] In a possible implementation, one end of the push rod is connected with a push block, the push block covers the first mounting opening and is slidably connected with the fixed cylinder, and an anti-skid pattern is arranged on a side of the push block away from the first mounting opening.
[0014] In a possible implementation, the fixed cylinder is provided with a first clamping groove, the first clamping groove extends along the length direction of the fixed cylinder, the first clamping groove is arranged at a side of the first mounting opening, the push block is provided with a first protruding part, and the first protruding part is arranged in the first clamping groove and can slide along the extension direction of the first clamping groove.
[0015] In a possible implementation, the fixed cylinder is provided with a second mounting opening, the second mounting opening is arranged at a different side of the fixed cylinder from the first mounting opening, and the mounting seat is connected with a sliding member, one end of the sliding member extends out of the second mounting opening, and the sliding member can move in the second mounting opening along the length direction of the fixed cylinder.
[0016] In a possible implementation, the sliding member includes a first sliding rod, a second sliding rod and a third sliding rod connected in sequence, the third sliding rod is connected with the mounting seat, and one end of the first sliding rod extending out of the second mounting opening is connected with a sliding block, and the sliding block is slidably matched with an outer wall of the fixed cylinder.
[0017] In a possible implementation, an inner wall of the fixed cylinder is provided with a limiting groove, the limiting groove extends along the length direction of the fixed cylinder, and an outer wall of the injection cylinder is connected with a limiting block, and the limiting block is slidably matched with the limiting groove.
[0018] The application has at least the following beneficial effects:
[0019] The injection needle of the present application can prevent the blood vessel from being punctured. The first needle body and the second needle body are provided. During use, the second needle body is used to puncture into the tissue, and then the first needle body is moved relative to the second needle body in the axial direction to move the first needle body out of the sharp end of the second needle body, so that the first needle body enters the tissue. Then, the second needle body is moved relative to the first needle body in the length direction of the first needle body and is retracted in the direction away from the sharp end, and is withdrawn from the tissue. Then, the first needle body is used to inject the injection liquid into the tissue. Since the second needle body is only used for puncture, the first needle body is a blunt needle, and the second needle body has been withdrawn from the tissue when the first needle body is used for injection. Therefore, the damage to the tissue can be reduced, and the injection liquid is not easily contaminated. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0021] Figure 1 FIG. 1 is a schematic diagram of the first state of the injection device of the present application;
[0022] Figure 2 FIG. 2 is a schematic diagram of the second state of the injection device of the present application;
[0023] Figure 3 FIG. 3 is a schematic diagram of the third state of the injection device of the present application;
[0024] Figure 4 FIG. 4 is a schematic diagram of the first needle body of the present application;
[0025] Figure 5 FIG. 5 is a schematic diagram of the cooperation between the push block and the fixed cylinder of the present application;
[0026] Figure 6 FIG. 6 is a schematic diagram of the cooperation between the injection cylinder and the fixed cylinder of the present application.
[0027] FIG. 1 is a schematic diagram of the first state of the injection device of the present application; DETAILED DESCRIPTION
[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts are within the scope of protection of the present application.
[0030] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0031] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiments
[0032] The present embodiment provides a puncture-preventing injection needle 11, please refer to Figures 1-3 which comprises a first needle body 111 and a second needle body 112. The first needle body 111 is arranged in the second needle body 112, and the second needle body 112 has a sharp end 1121 for puncture, and the first needle body 111 is a blunt needle for injection. Exemplarily, the sharp end 1121 of the second needle body 112 is beveled to facilitate puncture.
[0033] The first needle body 111 can move along the axial direction of the second needle body 112, and can move beyond the sharp end 1121 of the second needle body 112; the second needle body 112 can move along the length direction of the first needle body 111 and retract away from the sharp end 1121.
[0034] The injection needle 11 of this application, which prevents puncture of blood vessels, is configured with a first needle body 111 and a second needle body 112. During use, the second needle body 112 punctures the tissue, and then the axial movement of the first needle body 111 relative to the second needle body 112 causes the first needle body 111 to move beyond the pointed end 1121 of the second needle body 112 (see reference). Figure 1 and Figure 2 This allows the first needle body 111 to enter the tissue, and then the second needle body 112 is moved relative to the first needle body 111 and along the length of the first needle body 111, and retracted away from the pointed end 1121 (see reference). Figure 2 and Figure 3 This allows the second needle body 112 to exit the tissue, and then the first needle body 111 is used for injection, injecting the solution into the tissue. Since the second needle body 112 is used for puncture, and the first needle body 111 is a blunt needle used for injection, and the second needle body 112 has already exited the tissue when the first needle body 111 is injected, damage to the tissue is reduced. Furthermore, even if tissue remains when the second needle body 112 punctures the tissue membrane, the injection solution is less likely to be contaminated because the second needle body 112 has already exited the tissue when the first needle body 111 is injected.
[0035] For example, the outer surface of the needle tip 1111 of the first needle body 111 is a convex curved surface, and the side wall of the needle tip 1111 is provided with a liquid outlet 1112 (see reference). Figure 4 Because the outer surface of the needle tip 1111 of the first needle body 111 is a convex curved surface, the first needle body 111 causes less damage to tissue and is less likely to damage tissue. Furthermore, the liquid outlet 1112 of the first needle body 111 is located on the side wall of the needle tip 1111, preventing the formation of a sharp point at the needle tip 1111, thus improving safety. Optionally, the outer surface of the needle body and the outer surface of the needle tip 1111 are on the same surface of rotation, resulting in an overall smooth arc or curved surface on the outer surface of the injection needle 11, further reducing the likelihood of puncture wounds to tissue.
[0036] This embodiment also provides a syringe component 10, please refer to... Figures 1-3 It includes a fixing cylinder 12, an injection cylinder 13, and the aforementioned injection needle 11 for preventing puncture of blood vessels.
[0037] The fixed cylinder 12 is provided with a mounting seat 121 at one end, and the second needle body 112 is mounted on the mounting seat 121. The mounting seat 121 is slidably connected with the fixed cylinder 12 and can move along the length direction of the fixed cylinder 12. The first needle body 111 is fixedly mounted on the injection cylinder 13. The inner cavity of the first needle body 111 communicates with the inside of the injection cylinder 13. The injection cylinder 13 is provided with a push rod 131. The push rod 131 can push the injection liquid in the injection cylinder 13 out of the first needle body 111. The injection cylinder 13 is arranged in the fixed cylinder 12 and can move along the length direction of the fixed cylinder 12.
[0038] In use, the second needle body 112 is first punctured into the tissue, and then the injection cylinder 13 is moved along the length direction of the fixed cylinder 12, so that the first needle body 111 is pushed forward and moves out of the sharp end 1121 of the second needle body 112, and the first needle body 111 enters the tissue. Then the mounting seat 121 is moved along the length direction of the fixed cylinder 12, and the second needle body 112 is moved along the length direction of the first needle body 111 and retracted in the direction away from the sharp end 1121, and the second needle body 112 exits the tissue. Then the injection liquid in the injection cylinder 13 is pushed out of the first needle body 111 by the push rod 131, and the injection liquid is injected into the tissue.
[0039] Exemplarily, the fixed cylinder 12 is provided with a first mounting port 122, and the injection cylinder 13 is connected with a push rod 124. The push rod 124 extends out of the first mounting port 122 and can move along the length direction of the fixed cylinder 12 relative to the first mounting port 122. Through the action of the first mounting port 122, the movement length of the push rod 124 can be limited, so as to limit the length of the first needle body 111 extending out of the sharp end 1121 of the second needle body 112.
[0040] Optionally, one end of the push rod 124 is connected with a push block 125. The push block 125 covers the first mounting port 122 and slidably cooperates with the outer wall of the fixed cylinder 12. One side of the push block 125 away from the first mounting port 122 is provided with an anti-skid pattern. By sliding the push block 125 relative to the length direction of the fixed cylinder 12, the injection cylinder 13 is driven to move relative to the length direction of the fixed cylinder 12. The push block 125 slidably cooperates with the outer wall of the fixed cylinder 12, so that the push block 125 can move more smoothly.
[0041] Exemplarily, the fixed cylinder 12 is provided with a first clamping groove 126 extending along the length direction of the fixed cylinder 12. The first clamping groove 126 is arranged at the side of the first mounting port 122. The push block 125 is provided with a first protruding part. The first protruding part is arranged in the first clamping groove 126 and can slide along the extension direction of the first clamping groove 126 (see Figure 5 ). By sliding the first protruding part of the push block 125 with the first clamping groove 126 of the fixed cylinder 12, the push block 125 can be stably and smoothly slid.
[0042] Further, in order to make the syringe 13 move more stably in the fixed barrel 12, the inner wall of the fixed barrel 12 is provided with a limiting groove 128 extending along the length direction of the fixed barrel 12, and the outer wall of the syringe 13 is connected with a limiting block 132 which can slide with the limiting groove 128 (see Figure 6 ), so that the syringe 13 has certain support when moving in the fixed barrel 12, and the movement of the syringe 13 is more stable.
[0043] It should be noted that in other embodiments, the syringe 13 and the first needle body 111 can also move along the length direction of the fixed barrel 12 by other ways. For example, the inner wall of the fixed barrel 12 is also provided with at least two limiting grooves 128, the outer wall of the syringe 13 is connected with a limiting block 132 corresponding to the limiting grooves 128, the height of the syringe 13 is greater than the height of the fixed barrel 12, and the end of the syringe 13 is pushed forward, so that the syringe 13 and the first needle body 111 can move along the length direction of the fixed barrel 12.
[0044] In addition, in order to realize the retraction of the second needle body 112, in an embodiment, the fixed barrel 12 is provided with a second mounting port 123, and the second mounting port 123 and the first mounting port 122 are arranged on different sides of the fixed barrel 12. The mounting seat 121 is connected with a sliding piece 15, one end of the sliding piece 15 extends out of the second mounting port 123 and can move in the second mounting port 123 along the length direction of the fixed barrel 12. The sliding piece 15 includes a first sliding rod 151, a second sliding rod 152 and a third sliding rod 153, the first sliding rod 151 is arranged horizontally, the second sliding rod 152 is arranged vertically, and the third sliding rod 153 is arranged obliquely, the two ends of the second sliding rod 152 are respectively connected with the first sliding rod 151 and the third sliding rod 153, the end of the third sliding rod 153 is connected with the mounting seat 121, and the first sliding rod 151 extends out of the second mounting port 123. For example, the first mounting port 122 and the second mounting port 123 are arranged on opposite sides of the fixed barrel 12, so that the sliding piece 15 and the pushing block 125 do not easily interfere with each other during movement.
[0045] Exemplarily, the sliding piece 15 extends out of one end of the second mounting port 123 and is connected with a sliding block 154, i.e. one end of the first sliding rod 151 is connected with the sliding block 154. Specifically, the sliding block 154 is provided with a second protruding part, the fixing cylinder 12 is provided with a second clamping groove extending along the length direction of the fixing cylinder 12, and the second clamping groove is arranged at the side of the second mounting port 123, and the second protruding part is arranged in the second clamping groove and can slide along the extension direction of the second clamping groove. Through the sliding cooperation between the second protruding part of the sliding block 154 and the second clamping groove of the fixing cylinder 12, the sliding block 154 can smoothly and stably move along the length direction of the fixing cylinder 12.
[0046] Exemplarily, the inner wall of the fixing cylinder 12 is provided with a sliding groove extending along the length direction of the fixing cylinder 12, and the outer wall of the mounting seat 121 is provided with a convex strip which is slidably matched with the sliding groove. During the movement of the mounting seat 121 relative to the length direction of the fixing cylinder 12, the convex strip and the sliding groove are slidably matched, so that the mounting seat 121 can be stably and more smoothly slid.
[0047] It should be noted that, in order to realize the retraction of the second needle body 112, in other embodiments, other structures can also be used as long as the mounting seat 121 can retract along the length direction of the fixing cylinder 12 and away from the sharp end 1121.
[0048] In summary, the injection needle 11 and the injection device 10 of the present application can reduce the damage to the tissue and are not easy to contaminate the injection liquid, because the second needle body 112 is only used for puncture, the first needle body 111 is a blunt needle, and the second needle body 112 has exited the tissue when the first needle body 111 performs injection.
[0049] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A puncture resistant blood vessel injection needle, characterized by, The injection needle comprises a first needle body and a second needle body, the first needle body is arranged in the second needle body, the second needle body has a sharp end for puncture, and the first needle body is a blunt needle for injection; The first needle body can move along the axial direction of the second needle body and can move out of the sharp end of the second needle body; The second needle body can move along the length direction of the first needle body and can retract away from the sharp end.
2. The puncture resistant, blood vessel compatible needle of claim 1 wherein, The first needle body comprises a needle tip, the outer surface of the needle tip is a convex curved surface, and the sidewall of the needle tip is provided with a liquid outlet.
3. The puncture resistant, blood vessel compatible needle of claim 1 wherein, The sharp end of the second needle body is beveled.
4. An injection device, characterized in that The injection needle comprises a fixed barrel, an injection barrel and the injection needle of any one of claims 1-3. One end of the fixed barrel is provided with a mounting seat, the second needle body is mounted on the mounting seat, the mounting seat is slidably connected with the fixed barrel and can move along the length direction of the fixed barrel; The first needle body is mounted on the injection barrel, the inner cavity of the first needle body is communicated with the inside of the injection barrel, a push rod is mounted in the injection barrel, the push rod can push the injection liquid in the injection barrel out of the first needle body; the injection barrel is arranged in the fixed barrel and can move along the length direction of the fixed barrel.
5. The injection device of claim 4, wherein, The fixed barrel is provided with a first mounting opening, the push rod is connected with the injection barrel, the push rod extends out of the first mounting opening and can move along the length direction of the fixed barrel relative to the first mounting opening.
6. The injection device of claim 5, wherein, One end of the push rod is connected with a push block, the push block covers the first mounting opening and is slidably connected with the fixed barrel, one side of the push block away from the first mounting opening is provided with an anti-skid pattern.
7. The injection device of claim 6, wherein, The fixed barrel is provided with a first clamping groove, the first clamping groove extends along the length direction of the fixed barrel, the first clamping groove is arranged on the side of the first mounting opening, the push block is provided with a first protruding part, the first protruding part is arranged in the first clamping groove and can slide along the extension direction of the first clamping groove.
8. Injection device according to any of claims 5 to 7, characterized in that The fixed barrel is provided with a second mounting opening, the second mounting opening is arranged on different sides of the fixed barrel from the first mounting opening, the mounting seat is connected with a sliding member, one end of the sliding member extends out of the second mounting opening and can move in the second mounting opening along the length direction of the fixed barrel.
9. The injection device of claim 8, wherein, The sliding member comprises a first sliding rod, a second sliding rod and a third sliding rod connected in sequence, the third sliding rod is connected with the mounting seat, one end of the first sliding rod extending out of the second mounting opening is connected with a sliding block, the sliding block is slidably matched with the outer wall of the fixed barrel.
10. The injection device of claim 4, wherein, The inner wall of the fixed barrel is provided with a limiting groove, the limiting groove extends along the length direction of the fixed barrel, the outer wall of the injection barrel is connected with a limiting block, the limiting block can be slidably matched with the limiting groove.