An injection needle

Abstract

The utility model discloses an injection needle, which is mainly used for insulin injection. The injection needle mainly includes a needle seat and a protective sleeve. The needle seat includes a holder, and the protective sleeve is sleeved on the holder. The needle seat includes more than two arc-shaped side panels, one end of the arc-shaped side panel is stepped, and the end of the arc-shaped side panel that is stepped includes a first end and a second end. The protective sleeve includes a circular ring, and the protective sleeve is sleeved on the outer surface of the holder through the circular ring. The circular ring is provided with ratchets. The protective sleeve is rotated clockwise to fix the circular ring on the holder, so that the protective sleeve cannot be reversed. At this time, the needle tube is located in the protective sleeve, so that the injection needle cannot be reused. The advantages of the utility model are that the device can be self-destructed, secondary use can be avoided, acupuncture can be prevented, and all safety hazards can be eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, in particular to an injection needle. Background Art

[0002] Comparative document 1, patent number: CN200620038771.0, application date: 2006.01.06, announcement number: CN2882649Y, announcement date: 2007.03.28, patentee: Wenzhou Beipu Technology Co., Ltd., this case discloses "a needle for insulin injection", and its claims are as follows: it mainly includes a needle seat, a needle tube is arranged on the top of the needle seat, and it is characterized in that: an internal thread is arranged in the cavity of the needle seat, the diameter of the needle seat is 5mm-50mm, the needle tube is outer-connected with a needle tube protective sleeve, the needle seat is outer-connected with a needle seat protective sleeve, and a sealing dialysis paper is arranged at the lower opening of the needle seat protective sleeve.

[0003] Comparative Document 1 discloses a conventional insulin injection needle structure. The needle tips of existing conventional insulin syringes and pen-type insulin syringes are always exposed to the outside after use, which undoubtedly exposes safety issues. Moreover, the internal structure of existing insulin syringes also has defects and can be recycled and reused, which poses a safety hazard for medical accidents.

[0004] Comparative Document 2, Patent No.: CN201420663437.9, Application Date: 2014.11.10, Publication No.: CN204219537U, Publication Date: 2015.03.25, Patentee: Wenzhou Beipu Technology Co., Ltd., This case discloses a "disposable safe self-destructive insulin needle", and its claims are as follows: A needle seat (1) is provided in the insulin needle body, and the needle seat is cylindrical as a whole, and the inner cavity of the cylindrical needle seat (1) is hollow. A needle tube substrate (9) is provided in the cavity of the needle seat (1), and the needle tube substrate (9) divides the inner cavity of the needle seat (1) into an upper independent space (12) and a lower independent space (13), and the inner wall of the lower independent space (13) is disposed. An internal thread (20) is arranged, a spring fixing column (10) is arranged at the center of the upper surface of the needle tube substrate (9), the lower section of the spring fixing column (10) is located in the upper independent space (12), a needle tube (7) is arranged at the needle tube substrate (9), the needle tube (7) penetrates the needle tube substrate (9), one end of the needle tube (7) penetrates the spring fixing column (10) located at the center of the needle tube substrate (9) and then extends upward, the other end of the needle tube (7) penetrates the needle tube substrate (9) and then extends into the lower independent space (13), both ends of the needle tube (7) are thorn-shaped, at least one elastic sheet (11) is distributed on the inner wall of the upper independent space (12) of the needle tube (7), and the elastic sheet (11) is obliquely arranged on the inner wall of the inner cavity of the needle tube (7). One end of the elastic sheet (11) is connected to the inner wall of the inner cavity of the needle tube (7), and the other end of the elastic sheet (11) is suspended, and the suspended end points to the upper surface of the needle tube substrate (9) near the center. The spring fixing column (10) is sleeved with a spring (6) on the outside, and one end of the spring (6) is pressed downward against the upper surface of the needle tube substrate (9), and the other end of the spring (6) is pressed upward against the safety sheath (5). A safety card seat (4) is sleeved at the upper end of the needle seat (1), and the lower end of the safety card seat (4) is sleeved with the upper end of the needle seat (1), and a safety sheath (5) is provided at the upper end of the safety card seat (4). The safety card seat (4) is cylindrical as a whole, and the inner cavity of the safety card seat (4) is hollow. The inner edge of the upper end opening of the safety card seat (4) is formed The annular limiting portion (14) and the safety sleeve (5) are also cylindrical in shape as a whole. The inner cavity of the safety sleeve (5) is hollow. An annular limiting protrusion (15) cooperating with the annular limiting portion (14) is formed at the outer edge of the lower opening of the safety sleeve (5). The annular limiting protrusion (15) is located in the cavity of the safety seat (4) below the annular limiting portion (14). The upper end surface of the annular limiting protrusion (15) can be pressed downward against the lower end surface of the annular limiting portion (14). The outer edge of the lower opening of the safety sleeve (5) and the inner edge of the upper opening of the safety seat (4) are mutually limited and sleeved. The outer portion of the spring (6) is sleeved with a self-destructing pressure seat (3). The self-destructing pressure seat (3) is cylindrical in shape as a whole. The inner cavity of the self-destructing pressure seat (3) is hollow.The outer diameter of the upper section of the self-destructing pressure seat (3) is smaller than the outer diameter of the lower section of the self-destructing pressure seat (3); an annular limiting step (16) is formed between the upper section and the lower section of the self-destructing pressure seat (3); the outer diameter of the lower section of the self-destructing pressure seat (3) is larger than the diameter of the inner cavity of the safety sheath (5); the outer diameter of the upper section of the self-destructing pressure seat (3) is smaller than or equal to the diameter of the inner cavity of the safety sheath (5); the upper section of the self-destructing pressure seat (3) is located in the cavity of the safety sheath (5); the end surface of the annular limiting step (16) is upwardly pressed against the end surface of the lower end of the safety sheath (5); the lower section of the self-destructing pressure seat (3) is An annular protrusion (17) is formed on the outer wall of the part to cooperate with the elastic sheet (11), and the vertical distance between the annular protrusion (17) and the needle tube (7) is greater than the vertical distance between the suspended end of the elastic sheet (11) and the needle tube (7). The upper end of the safety sheath (5) is in a closed state, and a circular hole (18) is opened at the closed end surface. The diameter of the circular hole (18) is smaller than the diameter of the upper end of the spring (6). The upper end of the spring (6) is upwardly pressed against the inner surface of the upper end surface of the safety sheath (5), and the end surface of the lower end of the needle seat (1) is covered with dialysis paper (8).

[0005] Comparative Document 2 discloses a disposable safe self-destructing insulin needle, which includes an insulin needle body, a needle seat is provided inside the insulin needle body, a spring fixing column is provided at the center of the upper surface of the needle tube substrate of the needle seat, at least one elastic sheet is distributed on the inner wall of the upper part of the needle tube, and the elastic sheet is obliquely arranged on the inner wall of the inner cavity of the needle tube, and a spring is sleeved on the outside of the spring fixing column, one end of the spring is pressed against the upper surface of the needle tube substrate downward, and the other end of the spring is pressed against the safety sheath upward, and a safety seat is provided at the lower end of the safety sheath, and a self-destructing pressure seat is sleeved on the outside of the spring, and the upper section of the self-destructing pressure seat is located in the cavity of the safety sheath. The product adopts a sleeve-type linkage structure, and uses the spring at the central axis to achieve instantaneous reset of the safety sheath to ensure that the needle tube will not be exposed. Further, the elastic sheets distributed unevenly on the inner wall of the needle seat are used to achieve the deflection and tilt of the self-destructing pressure seat, which ultimately ensures that the insulin needle cannot be used a second time and realizes the safe self-destruction operation of the insulin needle. Utility Model Content

[0006] The utility model provides an injection needle to solve the problem that the end of the existing needle tube has no effective protection, avoids the safety problem of the needle tube after the injection is completed, and realizes the self-destruction function of the injection needle through a self-destruction structure, effectively preventing the injection needle from being used twice, and eliminating all safety hazards.

[0007] In order to solve the above technical problems, the utility model discloses the following technical solutions:

[0008] The utility model provides an injection needle, comprising a needle seat and a protective sleeve.

[0009] The needle seat includes a base, a mounting post, a holder and two or more arc-shaped side panels, the mounting post is fixed to the top of the base and the central axis of the mounting post coincides with the central axis of the base, a needle tube is installed on the mounting post, the holder is sleeved on the mounting post and the inner surface of the holder is attached to the outer surface of the mounting post, the outer surface of the holder is attached to the arc-shaped side panel, one end of the arc-shaped side panel is fixed to the top of the base, the other end of the arc-shaped side panel is stepped, and the other end of the arc-shaped side panel includes a first end and a second end, the second end protruding from the first end; the protective cover includes a circular ring, and the protective cover is installed to the end of the holder away from the base through the circular ring.

[0010] Furthermore, the socket includes three first ratchets, which are evenly distributed on the outer surface of the end of the socket away from the base; the second end of the arc-shaped side panel is fixed to the end of the socket away from the base, and two adjacent arc-shaped side panels form a first channel with the socket, and the first ratchets are located above the first channel.

[0011] Furthermore, the circular ring member includes three embracing structures evenly distributed on the inner side of the circular ring member, and the embracing structure includes a second ratchet and a protrusion, the second ratchet and the protrusion are arranged opposite to each other, and the second ratchet and the protrusion extend in a direction close to the socket.

[0012] Furthermore, the protective cover includes two oppositely arranged second channels and two third ratchets, the second channels are arranged on the outer surface of the protective cover, and the width of the second channels is not less than the width of the arc-shaped side plate; the two third ratchets are distributed on the outer side of the circular ring member, the third ratchets are arranged in the second channel, and the third ratchets are arranged at one end of the second channel close to the card seat.

[0013] Furthermore, a first groove is provided at the first end of the arc-shaped side plate, and the first groove is provided on a side of the first end close to the second end; a second groove is provided at the plate body where the first end of the arc-shaped side plate is located, and the second groove extends from one end of the first end of the arc-shaped side plate to the other end, and the second groove can accommodate the third ratchet of the protective cover.

[0014] Furthermore, a first guide bevel is provided on the side of the first end of the arcuate side panel away from the second end of the arcuate side panel, and the first guide bevel is located at the angle between the side of the first end away from the second end and the top of the first end, and the first guide bevel is close to the top of the first end.

[0015] Furthermore, a second guide bevel is provided on the side of the first end of the arcuate side panel away from the second end of the arcuate side panel, the second guide bevel is located at the angle between the side of the first end away from the second end and the top of the first end, and the second guide bevel is close to the side of the first end away from the second end, and the second guide bevel is arranged adjacent to the first guide bevel.

[0016] Furthermore, an annular groove is provided on the outer surface of the holder, the annular groove is provided at one end of the holder away from the base, and the annular member is clamped in the annular groove.

[0017] Furthermore, an annular wall is provided on the outer wall of one end of the clamping seat away from the base; and the first ratchet tooth of the clamping seat is provided below the annular wall.

[0018] Furthermore, the injection needle also includes a protective shell and a sealing dialysis paper. The protective shell is sleeved on the injection needle; and the sealing dialysis paper is attached to the opening at the bottom of the protective shell.

[0019] Compared with the prior art, the utility model has at least the following technical effects:

[0020] The utility model provides an injection needle, which is mainly used for insulin injection. The injection needle mainly comprises a needle seat and a protective sleeve. The needle seat comprises a holder, and the protective sleeve is sleeved on the holder. The needle seat comprises more than two arc-shaped side panels, one end of the arc-shaped side panel is stepped, and the end of the arc-shaped side panel that is stepped comprises a first end and a second end. The protective sleeve comprises a circular ring, and the protective sleeve is sleeved on the outer surface of the holder through the circular ring. The circular ring is provided with ratchets. The protective sleeve is rotated clockwise to fix the circular ring on the holder, so that the protective sleeve cannot be reversed, and the device is self-destructed. At this time, the needle tube is located in the protective sleeve, so that the injection needle cannot be reused, needle sticks are prevented, and safety hazards are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of the injection needle described in Example 1 of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the injection needle part described in Example 1 of the utility model;

[0024] Figure 3 This is a schematic diagram of the overall structure of the needle seat described in Example 1 of the utility model;

[0025] Figure 4 This is a schematic diagram of the explosion of the needle seat described in Example 1 of the utility model;

[0026] Figure 5 This is an overall schematic diagram of another needle seat structure described in Example 1 of the utility model;

[0027] Figure 6 This is a schematic structural diagram of the circular ring member described in Example 1 of the utility model;

[0028] Figure 7 This is a partial structural schematic diagram of the needle seat described in Example 1 of the utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the injection needle part described in Example 2 of the utility model;

[0030] Fig. 9 This is a schematic diagram of the overall structure of the needle seat described in Example 2 of the utility model.

[0031] The components in the figure are marked as follows:

[0032] 10 injection needle, 11 needle seat, 12 protective cover, 13 protective shell, 14 sealing dialysis paper, 15 needle tube;

[0033] 111 base, 112 mounting column, 113 seat, 114 arc-shaped side plate, 115 first end, 116 second end, 117 first ratchet tooth, 118 first channel, 119 first groove, 1110 first guide slope, 1111 strip groove, 1112 annular groove, 1113 annular wall, 1114 second recess, 1115 gap;

[0034] 121 circular ring, 122 circle-embracing structure, 123 second ratchet tooth, 124 protrusion, 125 arc surface side, 126 concave surface side, 127 second channel, 128 third ratchet tooth. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] In the drawings, components with the same structure are indicated by the same numerical labels, and components with similar structures or functions are indicated by similar numerical labels. Directional terms mentioned in the present invention, such as up, down, front, back, left, right, inside, outside, upper surface, lower surface, side, top surface, bottom, front end, rear end, end, etc., are only directions in the drawings and are only used to explain and illustrate the present invention, but not to limit the scope of protection of the present invention.

[0037] In the drawings, components with the same structure are indicated by the same numerical reference numerals. When some components are described as being "on" another component, the component may be directly placed on the other component; there may also be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "mounted to" or "connected to" another component, the two may be understood to be directly "mounted" or "connected", or one component may be indirectly "mounted to" or "connected to" another component through an intermediate component.

[0038] Example 1

[0039] like Figure 1-Figure 2 As shown, the utility model provides an injection needle 10 , comprising a needle seat 11 and a protective sleeve 12 , wherein the needle seat 11 is sleeved on the protective sleeve 12 .

[0040] Furthermore, the injection needle 10 further includes a protective shell 13 and a sealing dialysis paper 14 . The protective shell 13 is sleeved on the injection needle 10 , and the sealing dialysis paper 14 is attached to an opening at the bottom of the protective shell 14 (not shown).

[0041] like Figure 3-Figure 4As shown, the needle seat 11 includes a base 111, a mounting column 112, a holder 113 and more than two arc-shaped side plates 114. In this embodiment, three arc-shaped side plates 114 are included. The mounting column 112 is fixed to the top of the base 111 and the central axis of the mounting column 112 coincides with the central axis of the base 111. A needle tube 15 is installed on the mounting column 112. One end of the needle tube 15 protrudes from the top of the mounting column 112 and extends upward. The other end of the needle tube 15 protrudes from the top of the base 111 and extends toward the bottom of the base 111. The bottom of the base 111 is designed without a bottom surface, which is convenient for the injection needle 10 to be installed on the syringe. The holder 113 is sleeved on the mounting column 112 and the inner surface of the holder 113 It is fitted to the outer surface of the mounting column 112, and the outer surface of the holder 113 is fitted to the arcuate side panel 114. One end of the arcuate side panel 114 is fixed to the top of the base 111, and the other end of the arcuate side panel 114 is stepped, and the other end of the arcuate side panel 114 includes a first end 115 and a second end 116, and the second end 116 protrudes from the first end 115; the protective cover 12 includes a circular ring 121, and the protective cover 12 is installed to the end of the holder 113 away from the base 111 through the circular ring 121. The protective cover 12 can move up and down between two adjacent arcuate side panels 114 along the extension direction of the holder 113 through the circular ring 121, and the protective cover 12 can rotate clockwise.

[0042] Furthermore, the holder 113 includes three first ratchet teeth 117, which are evenly distributed on the outer surface of the end of the holder 113 away from the base 111. Specifically, each first ratchet tooth 117 is located between two adjacent arc-shaped side plates 114, and the first ratchet tooth 117 is close to the side of the second end 116 away from the first end 115.

[0043] In another embodiment, if Figure 5 As shown, the needle seat 11 also includes another structure, the second end 116 of the arcuate side plate 114 is fixed to the end of the holder 113 away from the base 111, the two adjacent arcuate side plates 114 and the holder 113 form a first channel 118, the first ratchet 117 is located above the first channel 118, and the protective cover 12 can move up and down along the extension direction of the first channel 118 to perform normal use operations of the injection needle 10.

[0044] like Figure 6As shown, the circular ring member 121 includes three embracing structures 122, and the three embracing structures 122 are evenly distributed on the inner side of the circular ring member 122. The embracing structure 122 includes a second ratchet 123 and a protrusion 124. The second ratchet 123 and the protrusion 124 are arranged opposite to each other, and the second ratchet 123 and the protrusion 124 extend in a direction close to the holder 113. The two sides of the second ratchet 123 are respectively an arc side 125 and a concave side 126. The first ratchet 117 can move from the arc side 125 to the concave side 126, that is, it can rotate clockwise, but cannot move from the concave side 126 to the arc side 125, that is, it can rotate counterclockwise, thereby ensuring that the protective cover 12 can only rotate clockwise on the outer surface of the holder 113 and cannot rotate counterclockwise, thereby realizing the self-destruction of the injection needle 10 and ensuring that the injection needle 10 can only be used once to avoid safety hazards.

[0045] like Figure 7 As shown, the first end portion 115 of the arc-shaped side plate 114 is provided with a first groove 119, and the first groove 119 is provided on one side of the first end portion 115 close to the second end portion 116. When the injection needle 10 is used up, the protective cover 12 is pulled upward along the extension direction of the holder 113, so that the protective cover 12 and the needle holder 11 are restored to the initial state. At this time, the needle tube 15 is located in the protective cover 12, and the protective cover 12 is rotated clockwise to move the first ratchet tooth 117 from the arc surface side 125 of the second ratchet tooth 123 to the groove of the second ratchet tooth 123. The surface side 126 enables the first ratchet 117 to engage with the second ratchet 123, preventing the protective sleeve 12 from rotating counterclockwise and achieving self-destruction of the device. At this time, each embracing structure 122 is located on the first end 115 of an arc-shaped side plate 114, and the embracing structure 122 is engaged with the first groove 119, further ensuring that the protective sleeve 12 cannot rotate counterclockwise, and when the embracing structure 122 is located in the first groove 119, it can ensure that the needle tip of the needle tube 15 is always located in the protective sleeve 12, preventing the needle tip from being exposed and avoiding safety hazards.

[0046] Another example Figure 3 As shown, a first guide slope 1110 is provided on the side of the first end 115 of the arc-shaped side panel 114 away from the second end 116 of the arc-shaped side panel 114 , and the first guide slope 1110 is located at the angle between the side of the first end 115 away from the second end 116 and the top of the first end 115 , and the first guide slope 1110 is close to the top of the first end 114 .

[0047] Furthermore, a second guide bevel 1111 is provided on the side of the first end 115 of the arcuate side plate 114 away from the second end 116 of the arcuate side plate 114, and the second guide bevel 1111 is located at the angle between the side of the first end 115 away from the second end 116 and the top of the first end 115, and the second guide bevel 1111 is close to the side of the first end 115 away from the second end 116, that is, the second guide bevel 1111 is close to the side of the first end 115 of the arcuate side plate 114, and the second guide bevel 1111 is adjacent to the first guide bevel 1110, that is, the first guide bevel 1110 and the second guide bevel 1111 have a common edge, so that the injection needle 10 can be smoothly rotated clockwise after use, so that each circular structure 122 moves above the first end 115 of the arcuate side plate 114, thereby realizing the self-destruction of the injection needle 10.

[0048] Another example Figure 3 As shown, an annular groove 1112 is provided on the outer surface of the holder 113. The annular groove 1112 is provided at one end of the holder 113 away from the base 111. The circular ring 121 is stuck in the annular groove 1112 to prevent the protective cover 12 from falling off in the absence of external force, thereby affecting the use of the injection needle 10. The circular ring 121 is stuck in the annular groove 1112, so that the needle is always located in the protective cover 13 in the absence of external force to prevent the needle from being exposed. In addition, when the protective cover 13 is subjected to downward force, when the annular groove 1112 and the circular ring 121 are separated, it can prompt the user that the protective cover 13 begins to be subjected to force and slides along the channel 117 toward the base 111, thereby improving the user experience.

[0049] Another example Figure 3 As shown, an annular wall 1113 is provided on the outer wall of one end of the holder 113 away from the base 111; the first ratchet 117 of the holder 113 is provided below the annular wall 1113, and when the first ratchet 117 and the second ratchet 123 are engaged, the embracing structure 122 is located between the first end 115 of the arc-shaped side plate 114 and the annular wall 1113, so that the needle of the needle tube 15 protruding from one end of the mounting column 112 is always located in the protective cover 12 after the injection needle 10 is used, so as to prevent needle sticks and avoid safety hazards.

[0050] In the application scenario of this embodiment, for example, in the initial state, the injection needle 10 is installed on the syringe, the protective cover 12 is pressed against the human skin, and the injection needle 10 is pressed to make the three circular structures 122 of the protective cover 12 disengage from the annular groove 1112, and the circular structure 122 begins to move downward between two adjacent arc-shaped side plates 114 along the extension direction of the holder 113 until the needle tube 15 penetrates the human skin. After the injection is completed, the protective cover 12 is pulled upward by external force to return to the initial state, and the protective cover 12 is rotated clockwise to move the circular structure 122 along the first guide slope 1110 and the second guide slope 1111 of the arc-shaped side plate 114 to the arc-shaped side plate 114. The first end portion 115 of the side plate 114 and the embracing structure 122 are engaged with the first groove 119. At this time, the first ratchet 117 moves from the arc side 125 of the second ratchet 123 to the concave side 126, that is, it can rotate clockwise. The first ratchet 117 and the second ratchet 123 are engaged to ensure that the protective cover 12 can only rotate clockwise on the outer surface of the holder 113 and cannot rotate counterclockwise, thereby realizing the self-destruction of the injection needle 10. The embracing structure 122 is stably located between the first end portion 115 of the arc-shaped side plate 114 and the annular wall 1113, so that the needle of the needle tube 1112 is located in the protective cover 13, so that the injection needle 10 cannot be used again, to prevent needle sticks and avoid safety hazards.

[0051] The advantage of this embodiment is that it provides an injection needle, which is mainly used for insulin injection. The injection needle mainly includes a needle seat and a protective sleeve. The needle seat includes a holder, and the protective sleeve is sleeved on the holder. The needle seat includes three arc-shaped side panels, one end of the arc-shaped side panel is stepped, and the end of the arc-shaped side panel that is stepped includes a first end and a second end. The protective sleeve includes a circular ring member, and the protective sleeve is sleeved on the outer surface of the holder through the circular ring member. The holder is provided with a first ratchet, and the circular ring member is provided with a second ratchet. The protective sleeve is rotated clockwise to engage the first ratchet with the second ratchet, and cannot be rotated counterclockwise, so that the protective sleeve cannot be reversed, thereby realizing self-destruction of the device. At this time, the needle tube is located in the protective sleeve, so that the injection needle cannot be reused, and acupuncture is avoided, thereby solving the problem of safety hazards.

[0052] Example 2

[0053] This embodiment includes all the contents of embodiment 1, the difference is that Figure 8-Figure 9As shown, the needle seat 11 includes two arc-shaped side plates 114, and the protective sleeve 12 includes two oppositely arranged second channels 127 and two third ratchet teeth 128. The second channel 127 is arranged on the outer surface of the protective sleeve 12, and the width of the second channel 127 is not less than the width of the arc-shaped side plate 114, so as to ensure that the arc-shaped side plate 114 can slide in the second channel 127, so that the injection needle 10 can be used normally; the third ratchet teeth 128 are distributed on the outer side of the circular ring 121, and the third ratchet teeth 128 are arranged in the second channel 127, and the third ratchet teeth 128 are arranged at one end of the second channel 127 close to the holder 113.

[0054] In this embodiment, no first ratchet 117 is provided below the annular wall 113 of the holder 113 , and a gap 1115 exists between the holder 113 and the arc-shaped side plate 114 . When the annular member 121 moves to the top of the base 111 , the protective cover 12 is located in the gap 1115 .

[0055] A second groove 1114 is provided in the plate body where the first end 115 of the arc-shaped side plate 114 is located. The second groove 1114 extends from one end of the first end 115 of the arc-shaped side plate 114 to the other end, and the second groove 1114 can accommodate the third ratchet 128 of the protective cover 12. When the third ratchet 128 can move up and down along the extension direction of the second groove 1114, the protective cover 12 can move up and down through the second channel 127 and the arc-shaped side plate 114 until the circular ring 121 moves to the top of the base 111.

[0056] In the application scenario of this embodiment, for example, in the initial state, the injection needle 10 is installed on the syringe, the protective cover 12 is pressed against the human skin, and the injection needle 10 is pressed to make the three circular structures 122 of the protective cover 12 disengage from the annular groove 1112, and the circular structure 122 begins to move downward between two adjacent arc-shaped side plates 114 along the extension direction of the holder 113 until the needle tube 15 penetrates the human skin. After the injection is completed, the protective cover 12 is pulled upward by external force to return to the initial state, and the protective cover 12 is rotated clockwise to make the circular structure 122 move along the arc-shaped side plates. The first guide bevel 1110 and the second guide bevel 1111 of 114 move to the first end 115 of the arc-shaped side plate 114, and the embracing structure 122 is engaged with the first groove 119. At this time, the second end 116 of the arc-shaped side plate 114 is engaged with the third ratchet 117 and cannot rotate counterclockwise, thereby realizing the self-destruction of the injection needle 10. The embracing structure 122 is stably located between the first end 115 of the arc-shaped side plate 114 and the annular wall 1113, so that the needle of the needle tube 1112 is located in the protective cover 13, so that the injection needle 10 cannot be used again, thereby preventing needle sticks and avoiding safety hazards.

[0057] The advantage of this embodiment is that it provides an injection needle, which is mainly used for insulin injection. The injection needle mainly includes a needle seat and a protective sleeve. The needle seat includes a holder, and the protective sleeve is sleeved on the holder. The needle seat includes two arc-shaped side plates, one end of the arc-shaped side plate is stepped, and the end of the arc-shaped side plate that is stepped includes a first end and a second end. The protective sleeve includes a circular ring. The protective sleeve is sleeved on the outer surface of the holder through the circular ring, and the outer surface of the protective sleeve is provided with a second channel. When the third ratchet can move up and down along the extension direction of the second groove, the protective sleeve can move up and down through the second channel and the arc-shaped side plate. The outer surface of the circular ring is provided with a third ratchet. The protective sleeve is rotated clockwise to engage the third ratchet with the second end, and cannot be rotated counterclockwise, so that the protective sleeve cannot be reversed, thereby realizing self-destruction of the device. At this time, the needle tube is located in the protective sleeve, so that the injection needle cannot be reused, and acupuncture is avoided, thereby solving the problem of safety hazards.

[0058] The utility model has the advantage of providing an injection needle, which is mainly used for insulin injection. The injection needle mainly includes a needle seat and a protective sleeve. The needle seat includes a holder, and the protective sleeve is sleeved on the holder. The needle seat includes more than two arcuate side panels, one end of the arcuate side panel is stepped, and the end of the arcuate side panel that is stepped includes a first end and a second end. The protective sleeve includes a circular ring, and the protective sleeve is sleeved on the outer surface of the holder through the circular ring. The circular ring is provided with ratchets. The protective sleeve is rotated clockwise to fix the circular ring on the holder, so that the protective sleeve cannot be reversed, and the device is self-destructed. At this time, the needle tube is located in the protective sleeve, so that the injection needle cannot be reused, needle sticks are prevented, and safety hazards are avoided.

[0059] The above is a detailed introduction to an injection needle provided in an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An injection needle, characterized in that: include: A needle holder, comprising a base, a mounting post, a holder and two or more arc-shaped side panels, wherein the mounting post is fixed to the top of the base and the central axis of the mounting post coincides with the central axis of the base, a needle tube is mounted to the mounting post, the holder is sleeved to the mounting post and the inner surface of the holder is attached to the outer surface of the mounting post, the outer surface of the holder is attached to the arc-shaped side panel, one end of the arc-shaped side panel is fixed to the top of the base, the other end of the arc-shaped side panel is stepped, and the other end of the arc-shaped side panel comprises a first end and a second end, and the second end protrudes from the first end; as well as The protective cover comprises a circular ring, and the protective cover is installed to an end of the card seat away from the base through the circular ring.

2. The injection needle according to claim 1, characterized in that The card holder comprises Three first ratchet teeth are evenly distributed on the outer surface of one end of the holder away from the base; The second end of the arc-shaped side plate is fixed to an end of the holder away from the base, two adjacent arc-shaped side plates and the holder form a first channel, and the first ratchet is located above the first channel.

3. The injection needle according to claim 1, characterized in that: The circular ring member comprises Three circle-embracing structures are evenly distributed on the inner side of the circular ring. The circle-embracing structure includes a second ratchet tooth and a protrusion. The second ratchet tooth and the protrusion are arranged opposite to each other, and the second ratchet tooth and the protrusion extend toward the direction close to the clamping seat.

4. The injection needle according to claim 1, characterized in that: The protective cover comprises Two second channels arranged opposite to each other, wherein the second channels are arranged on the outer surface of the protective cover, and the width of the second channels is not less than the width of the arc-shaped side plate; as well as Two third ratchets are distributed on the outer side of the circular ring, the third ratchets are arranged in the second channel, and the third ratchets are arranged at one end of the second channel close to the clamping seat.

5. The injection needle according to claim 1, characterized in that: A first groove is provided at the first end of the arc-shaped side plate, and the first groove is provided at a side of the first end close to the second end; A second groove is provided on the plate body where the first end of the arc-shaped side plate is located. The second groove extends from one end of the first end of the arc-shaped side plate to the other end, and the second groove can accommodate the third ratchet of the protective cover.

6. The injection needle according to claim 1, characterized in that: A first guiding slope is provided on the side of the first end of the arc-shaped side plate away from the second end of the arc-shaped side plate, and the first guiding slope is located at the angle between the side of the first end away from the second end and the top of the first end, and the first guiding slope is close to the top of the first end.

7. The injection needle according to claim 6, characterized in that A second guide slope is provided on the side of the first end of the arc-shaped side plate away from the second end of the arc-shaped side plate, the second guide slope is located at the angle between the side of the first end away from the second end and the top of the first end, and the second guide slope is close to the side of the first end away from the second end, and the second guide slope is arranged adjacent to the first guide slope.

8. The injection needle according to claim 1, characterized in that: A first guiding slope is provided on the side of the first end of the arc-shaped side plate away from the second end of the arc-shaped side plate, and the first guiding slope is located at the angle between the side of the first end away from the second end and the top of the first end, and the first guiding slope is close to the top of the first end.

9. The injection needle according to claim 1, characterized in that: An annular groove is provided on the outer surface of the holder. The annular groove is provided at one end of the holder away from the base. The annular member is clamped in the annular groove.

10. The injection needle according to claim 1, characterized in that: An annular wall is provided on the outer wall of one end of the card holder away from the base; The first ratchet of the clamping seat is arranged below the annular wall.

11. The injection needle according to claim 1, characterized in that: Also includes A protective shell, sleeved on the injection needle; and The sealing dialysis paper is attached to the opening at the bottom of the protective shell.

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