A blood collection needle

Abstract

The present invention provides a blood collection needle, comprising: a housing, a needle holder, a first spring, a housing cover, a protection component is provided in the housing for limiting the position of the needle holder; a limiting component is provided on the needle holder, and the needle holder movably passes through the protection component; both ends of the first spring are respectively connected to the protection component and the limiting component; the housing cover is movably engaged with the housing, and a protection component is installed in the housing cover; the protection component plays a certain role in limiting the needle holder, making the structure of the needle holder more stable, avoiding the rotation of the needle holder during use and causing secondary harm to the patient. After the needle holder is separated from the protection component, the protection component plays a blocking role on the needle holder, avoiding the movement of the needle holder and pushing the needle tip out of the housing again to cause indirect harm to others; the protection component in the housing cover buffers the limiting component, avoiding the separation of the limiting component from the cavity and playing a certain protective role on the limiting component.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a blood collection needle. Background Art

[0002] For a safe blood collection needle, after use, by retracting the needle into the housing, it can avoid the needle of the blood collection needle being exposed outside, causing secondary harm to patients, or coming into contact with others and causing cross-infection, so as to achieve the purpose of safe blood collection. However, after the existing safe blood collection needle retracts the needle into the housing, it may be accidentally touched by the user, pushing the needle out of the housing, resulting in the needle being exposed to the air again. At the same time, during the process of retracting the needle, there is a lack of a certain buffering or protection structure, which easily causes the limiting block to be damaged under strong impact, resulting in the retracted needle popping out of the housing. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a blood collection needle to solve the problems in the prior art that the needle is pushed out of the housing again and there is a lack of a protection structure for the limiting block.

[0004] One embodiment of the present invention provides a blood collection needle, including:

[0005] A housing, a limiting hole is opened on the housing, and a protection component is further provided in the housing for limiting the position of the needle seat;

[0006] A needle seat, a limiting component is provided on the needle seat, the limiting component is movably engaged with the limiting hole, and the needle seat movably passes through the protection component;

[0007] A first spring, the first spring is sleeved on the needle seat, and both ends of the first spring are respectively connected to the protection component and the limiting component;

[0008] A housing cover, the housing cover is movably engaged with the housing, a protection component for protecting the limiting component is installed in the housing cover, and an opening for the limiting component to pass through is opened on the housing cover.

[0009] Furthermore,

[0010] The housing includes:

[0011] A cylinder, the cylinder is fixedly connected to the housing, a first through hole is opened in the cylinder, the first through hole communicates with the cavity in the housing, the needle seat is movably connected to the first through hole, and a needle wing is sleeved on the cylinder.

[0012] Furthermore,

[0013] The protection component includes:

[0014] A protective block, which is installed on the inner wall of the housing. A second through hole for the needle seat to pass through is provided on the protective block, and the protective block is fixedly connected to one end of a first spring;

[0015] A limiting plate, which is arranged in the second through hole. A second spring is connected between the limiting plate and the second through hole;

[0016] A pulley, which is installed on the limiting plate. The pulley rolls on the surface of the needle seat, and a depression adapted to the pulley is provided on the surface of the needle seat.

[0017] Furthermore,

[0018] The limiting component includes:

[0019] A fixing block, the bottom of which is provided with a base. The size of the base is larger than that of the fixing block, and the fixing block and the base are arranged in an L shape. The base is fixedly connected to the needle seat, and the base is also connected to the end of the first spring different from the protective block;

[0020] Elastic pieces, which are symmetrically installed on both sides of the fixing block, and a clamping block is connected to the elastic pieces. The clamping block is clamped with the limiting hole;

[0021] A first slider, which is installed on the outside of the fixing block.

[0022] Furthermore,

[0023] The housing cover includes:

[0024] A first cover body, on which a first sliding groove adapted to the first slider is provided;

[0025] A second cover body, the bottom of which is provided with a protrusion, and the protection component is installed on the protrusion.

[0026] Furthermore,

[0027] The protection component includes:

[0028] A buffer plate, and a cavity for the buffer plate to move is provided inside the protrusion;

[0029] A third spring, the two ends of which are respectively connected to the cavity inside the protrusion and the buffer plate.

[0030] Furthermore,

[0031] Fourth through holes for the infusion tube to pass through are provided in both the fixing block and the needle seat.

[0032] Furthermore, the needle wings include:

[0033] A first needle wing, the first needle wing is connected with a collar a, the collar a is fixedly sleeved on the column, a groove is formed at the connection between the collar a and the needle seat, and a convex block corresponding to the groove is formed on the column;

[0034] A second needle wing, the second needle wing is connected with a collar b, and the collar b is movably sleeved on the column;

[0035] A snap-fit assembly is respectively arranged on the first needle wing and the second needle wing, and is used to fit and fix the second needle wing to the first needle wing.

[0036] Furthermore,

[0037] The clamping assembly comprises:

[0038] A limiting protrusion, wherein the limiting protrusion is installed on the first needle wing;

[0039] A card slot is provided on the second needle wing, and the card slot corresponds to the position of the limiting protrusion.

[0040] Furthermore,

[0041] The first needle wing and the second needle wing are both provided with anti-slip grooves on the side facing the skin.

[0042] The blood collection needle provided in the above embodiment has the following beneficial effects:

[0043] 1. The shell cover and the shell are movably engaged to form a cavity, and the needle seat moves in the cavity formed by the shell cover and the shell. The first spring is sleeved on the needle seat and is located between the needle seat and the protective component. The limit component is engaged with the limit hole to ensure that the needle seat can be engaged with the shell when in use, and the needle seat is prevented from rebounding during use. The needle seat passes through the protective component to make the needle extend out of the shell. When the limit component is engaged with the engaging hole, the needle seat is located in the protective component. The protective component plays a certain limiting role on the needle seat, making the structure of the needle seat more stable, and preventing the needle seat from swinging during use, causing the needle to rotate, causing secondary injury to the patient. When the limit component is separated from the engaging hole by external pressure, the first spring pushes the needle seat out. At this time, the needle seat is separated from the protective component, and the protective component plays a blocking role on the needle seat to prevent the needle seat from moving, pushing the needle out of the shell again, touching the user or causing indirect injury to others.

[0044] 2. When the limit assembly is separated from the limit hole, the first spring relaxes, pushes the limit assembly out, and the limit assembly passes through the opening to put the needle seat and the needle into the shell to prevent the needle from contacting other people and causing cross infection. At the same time, the protection assembly in the shell cover can buffer the limit assembly to prevent the limit assembly from leaving the cavity and play a certain protective role for the limit assembly.

[0045] 3. When using a blood collection needle to pierce the patient's skin, the first wing and the second wing are attached through a clamping component. After holding the first wing and piercing the needle into the skin, the second wing is opened. The first wing and the second wing are arranged in a folded form, so that the first wing and the second wing can better fit the user's skin during use. And when in use, the first wing and the second wing are folded for use. The first wing is fixedly arranged with the cylinder body, and the second wing is folded with the first wing, avoiding the rotation or deviation of the needle tip position caused by the situation that the first wing or the second wing is not fixed to the cylinder body during the process of holding the wing and piercing the needle into the skin. Through the anti-slip patterns provided on the sides of the first wing and the second wing facing the skin, the friction with the skin is increased, playing a certain role in fixing the needle tip. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0047] Figure 1 Structural schematic diagram of the present invention;

[0048] Figure 2 Structural schematic diagram of the needle base in the present invention;

[0049] Figure 3 Structural schematic diagram of the first cover in the present invention;

[0050] Figure 4 Top view structural schematic diagram of the present invention;

[0051] Figure 5 For Figure 4 Cross-sectional structural schematic diagram at A-A in

[0052] Figure 6 For Figure 5 Enlarged schematic diagram of the structure at C in

[0053] Figure 7 Side view structural schematic diagram of the present invention;

[0054] Figure 8 For Figure 7 Cross-sectional structural schematic diagram at B-B in

[0055] Figure 9 Structural schematic diagram of the protection component in the present invention;

[0056] Figure 10It is a top view structural schematic diagram of the limit component;

[0057] Figure 11 It is an exploded structural schematic diagram of the housing and the needle wing;

[0058] Figure 12 It is a bottom structural schematic diagram of the first needle wing and the second needle wing;

[0059] In the figure: 1000, blood collection needle;

[0060] 1100, housing; 1101, limit hole; 1102, cylinder; 1103, first through hole; 1104, convex block;

[0061] 1110, protection component; 1111, protection block; 1112, second through hole; 1113, limit plate; 1114, pulley; 1115, second spring;

[0062] 1200, needle seat; 1201, first spring; 1202, depression; 1203, fourth through hole;

[0063] 1210, limit component; 1211, fixed block; 1212, base; 1213, elastic piece; 1214, engaging block; 1215, first slider;

[0064] 1300, housing cover; 1301, opening; 1302, limit strip;

[0065] 1310, protection component; 1311, buffer plate; 1312, third spring; 1313, fixed convex block; 1314, fixed rod;

[0066] 1320, first cover body; 1321, first chute;

[0067] 1330, second cover body; 1331, protrusion;

[0068] 2000, needle wing;

[0069] 2100, first needle wing; 2110, collar a; 2111, groove;

[0070] 2200, second needle wing; 2210, collar b;

[0071] 2300, clamping component; 2310, limit convex block; 2320, clamping groove. Specific implementation mode

[0072] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0073] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0074] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions results in contradictions or cannot be achieved, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0075] Please refer to Figure 1 、 Figures 4-9 , a blood collection needle 1000, comprising:

[0076] A housing 1100, a limiting hole 1101 is formed on the housing 1100, and a protection component 1110 is further provided in the housing 1100 for limiting the position of the needle seat 1200;

[0077] A needle seat 1200, a limiting component 1210 is provided on the needle seat 1200, the limiting component 1210 is movably engaged with the limiting hole 1101, and the needle seat 1200 movably passes through the protection component 1110;

[0078] A first spring 1201, the first spring 1201 is sleeved on the needle seat 1200, and both ends of the first spring 1201 are connected to the protection component 1110 and the limiting component 1210 respectively;

[0079] The shell cover 1300 is movably engaged with the shell 1100 . A protection component 1310 for protecting the limit component 1210 is installed in the shell cover 1300 . An opening 1301 for the limit component 1210 to pass through is opened on the shell cover 1300 .

[0080] The present invention provides a technical solution,

[0081] The shell cover 1300 is movably engaged with the shell 1100 to form a cavity, and the needle seat 1200 is movable in the cavity formed by the shell cover 1300 and the shell 1100. The first spring 1201 is sleeved on the needle seat 1200 and is located between the needle seat 1200 and the protective component 1110. The limiting component 1210 is engaged with the limiting hole 1101 to ensure that the needle seat 1200 can be engaged with the shell 1100 when in use, and the needle seat 1200 is prevented from rebounding during use. The needle seat 1200 passes through the protective component 1110 to make the needle extend out of the shell 1100. When the limiting component 1210 is engaged with the limiting hole 1101, the needle seat 1200 is located in the protective component 1110. The protective component 1110 has a certain limiting effect on the needle seat 1200, making the structure of the needle seat 1200 more stable, and preventing the needle seat 1200 from swinging during use, causing the needle to rotate and causing secondary injury to the patient. After the positioning component 1210 is separated from the limiting hole 1101 by external pressure, the first spring 1201 pushes the needle seat 1200 out. At this time, the needle seat 1200 is separated from the protective component 1110. The protective component 1110 blocks the needle seat 1200 to prevent the needle seat 1200 from moving and pushing the needle out of the housing 1100 again to touch the user or cause indirect harm to others. When the limiting component 1210 is separated from the limiting hole 1101, the first spring 1201 relaxes to push the limiting component 1210 out. The limiting component 1210 passes through the opening 1301 and receives the needle seat 1200 and the needle into the housing 1100 to prevent the needle from contacting others and causing cross infection. At the same time, the protective component 1310 in the housing cover 1300 can buffer the limiting component 1210 to prevent the limiting component 1210 from leaving the cavity and play a certain protective role for the limiting component 1210.

[0082] It can be understood that by opening the shell cover 1300, the first spring 1201 is sleeved on the needle seat 1200, the needle seat 1200 is placed in the cavity of the shell 1100, and the needle seat 1200 passes through the protective component 1110, so that the limiting component 1210 is engaged with the limiting hole 1101, and the needle extends out of the shell 1100. At this time, the first spring 1201 is located between the limiting component 1210 and the protective component 1110. Under the pressure of the needle seat 1200, the first spring 1201 contracts to complete the installation of the needle seat 1200.

[0083] It should be noted that the length from the protective component 1110 to the outlet of the housing 1100 is greater than the length of the needle, ensuring that the needle does not protrude from the housing 1100 after the needle seat 1200 disengages from the protective component 1110. Part of the dimensions of the limiting component 1210 are greater than the opening 1301, ensuring that the needle seat 1200 does not eject from the housing 1100 through the opening 1301; Limiting bars 1302 are provided on both sides of the housing cover 1300 and on the housing 1100, facilitating the engagement of the housing cover 1300 with the housing 1100.

[0084] Please refer to Figure 1 、 Figures 4-9 , preferably, the housing 1100 includes:

[0085] A cylinder 1102, the cylinder 1102 is fixedly connected to the housing 1100, a first through hole 1103 is opened in the cylinder 1102, the first through hole 1103 communicates with the cavity inside the housing 1100, the needle seat 1200 is movably connected to the first through hole 1103, and a needle wing 2000 is sleeved on the cylinder 1102.

[0086] Specifically, the needle seat 1200 moves in the first through hole 1103. The length from the protective component 1110 to the outlet of the cylinder 1102 is greater than the length of the needle, ensuring that the needle does not protrude from the housing 1100 after the needle seat 1200 disengages from the protective component 1110. A convex platform is provided at one end of the cylinder 1102 away from the housing 1100 to limit the needle wing installed on the cylinder 1102.

[0087] It should be noted that the bottom surface size of the convex platform is greater than the end surface size of the cylinder 1102, making the distance from the bottom surface of the convex platform to the outer surface of the housing 1100 fixed, facilitating the limitation of the subsequent installed needle wing.

[0088] Please refer to Figures 8-9 , preferably, the protective component 1110 includes:

[0089] A protective block 1111, the protective block 1111 is installed on the inner wall of the housing 1100, a second through hole 1112 for the needle seat 1200 to pass through is opened on the protective block 1111, and the protective block 1111 is fixedly connected to one end of a first spring 1201;

[0090] A limiting plate 1113, the limiting plate 1113 is arranged in the second through hole 1112, and a second spring 1115 is connected between the limiting plate 1113 and the second through hole 1112;

[0091] A pulley 1114 is installed on the limiting plate 1113. The pulley 1114 rolls along the surface of the needle holder 1200, and a depression 1202 adapted to the pulley 1114 is provided on the surface of the needle holder 1200.

[0092] Specifically, when the limiting component 1210 is engaged with the limiting hole 1101, the needle holder 1200 penetrates through the second through hole 1112. The pulley 1114 on the limiting plate 1113 is located in the depression 1202 on the surface of the needle holder 1200, and the third spring 1312 contracts. When the limiting component 1210 is separated from the limiting hole 1101, the first spring 1201 expands. Under the action of the first spring 1201, the needle holder 1200 is withdrawn from the second through hole 1112. The pulley 1114 rolls in the depression 1202, and the second spring 1115 pushes up the limiting plate 1113 to reduce the area in the second through hole 1112, preventing the needle holder 1200 from penetrating into the second through hole 1112 again and ensuring that the needle tip is properly located within the housing 1100. The provision of the pulley 1114 avoids the use of other limiting blocks that would increase the frictional force between the needle holder 1200 and the surface of the limiting block, preventing the needle tip from being retracted into the housing 1100. At the same time, when the pulley 1114 is located in the depression 1202, it cooperates with the depression 1202 to limit the needle holder 1200, preventing the needle holder 1200 from rotating during use and causing the needle tip to rotate, which would affect the use.

[0093] It should be noted that the shape of the limiting plate 1113 conforms to the outer surface of the needle holder 1200. The most preferred shape of the present invention is circular arc. The pulley 1114 can be two, four, or n (n is an even number), and all the pulleys 1114 are evenly arranged on the two limiting plates 1113. The number of depressions 1202 corresponds to the number of pulleys 1114.

[0094] Please refer to Figures 1-5 , preferably, the limiting component 1210 includes:

[0095] A fixed block 1211, with a base 1212 provided at the bottom of the fixed block 1211. The size of the base 1212 is larger than that of the fixed block 1211, and the fixed block 1211 and the base 1212 are arranged in an L shape. The base 1212 is fixedly connected to the needle holder 1200, and the base 1212 is also connected to the end of the first spring 1201 that is different from the protective block 1111.

[0096] Elastic pieces 1213 are symmetrically installed on both sides of the fixed block 1211, and engaging blocks 1214 are connected to the elastic pieces 1213. The engaging blocks 1214 are engaged with the limiting holes 1101.

[0097] A first slider 1215 is installed on the outside of the fixed block 1211.

[0098] Specifically, pinch the engaging blocks 1214 on both sides with the thumb and index finger to separate the engaging blocks 1214 from the limiting holes 1101. After the engaging blocks 1214 are separated from the limiting holes 1101, the first spring 1201 expands and pushes the base 1212 and the fixing block 1211 towards the cover body, and the fixing block 1211 and the elastic piece 1213 are pushed out of the opening 1301. Since the size of the base 1212 is larger than that of the opening 1301, at this time, the fixing block 1211 and the elastic piece 1213 are located outside the cover body, and the base 1212 is located inside the cover body. The needle seat 1200 is received into the housing 1100, and the needle seat 1200 is separated from the second through hole 1112, avoiding the blood collection needle 1000 from touching others and causing cross-infection. At the same time, since the size of the base 1212 is larger than that of the opening 1301, the needle seat 1200 is prevented from ejecting out of the cover body.

[0099] It should be noted that third through holes for the needle and the infusion tube to pass through are provided on both the fixing block 1211 and the needle seat 1200. The elastic pieces 1213 are symmetrically arranged on both sides of the fixing block 1211 and are arranged in a U shape with the fixing block 1211. The engaging blocks 1214 are installed on the outer sides of both ends of the elastic pieces 1213. Please refer to Figure 10 , the part of the base 1212 larger than the fixing block 1211 is arranged in a C shape between the fixing block 1211 and the needle seat 1200, and the first slider 1215 is installed on the side of the fixing block 1211 flush with the base 1212.

[0100] Please refer to Figures 3-8 , preferably, the housing cover 1300 includes:

[0101] A first cover body 1320, on which a first sliding groove 1321 adapted to the first slider 1215 is provided;

[0102] A second cover body 1330, with a protrusion 1331 provided at the bottom thereof, and the protection assembly 1310 is installed on the protrusion 1331;

[0103] The protection assembly 1310 includes:

[0104] A buffer plate 1311, and a cavity for the buffer plate 1311 to move is provided inside the protrusion 1331;

[0105] A third spring 1312, with both ends thereof respectively connected to the cavity inside the protrusion 1331 and the buffer plate 1311.

[0106] Specifically, when the engaging block 1214 is separated from the limiting hole 1101, under the action of the first spring 1201, the fixing block 1211 enters the cover body. At the same time, the first sliding block 1215 on the fixing block 1211 is slidably connected to the first sliding groove 1321 on the first cover body 1320. The protruding end 1331 of the base 1212 on the fixing block 1211 corresponds to the second cover body 1330, and the base 1212 corresponds to the protruding 1331 on the second cover body 1330. When the fixing block 1211 and the elastic piece 1213 are disengaged from the opening 1301, the protruding 1331 of the base 1212 collides with the buffer plate 1311. The buffer plate 1311 moves towards the cavity inside the protruding 1331, and the third spring 1312 absorbs the impact force generated by the collision, providing a certain protection to the base 1212 and at the same time preventing the needle seat 1200 from popping out of the housing cover 1300 due to excessive impact.

[0107] It should be noted that the buffer plate 1311 is provided with a fixing convex block 1313, and a fixing rod 1314 is connected inside the cavity of the protruding 1331. The fixing convex block 1313 is slidably connected to the fixing rod 1314, playing a certain limiting role in the movement track of the buffer plate 1311. One end of the first sliding block 1215 facing the first sliding groove 1321 is of a triangular structure, facilitating the entry of the first sliding block 1215 into the first sliding groove 1321.

[0108] Please refer to Figure 2 and 10 Preferably,

[0109] A fourth through hole 1203 for the infusion tube to pass through is provided in both the fixing block 1211 and the needle seat 1200.

[0110] Specifically, the fourth through holes 1203 provided on the fixing block 1211 and the needle seat 1200 facilitate the installation of the infusion tube and the needle in the needle seat 1200.

[0111] Please refer to Figures 11-12 Preferably, the needle wing 2000 includes:

[0112] A first needle wing 2100, a collar a2110 is connected to the first needle wing 2100. The collar a2110 is fixedly sleeved on the column body. A groove 2111 is provided at the connection between the collar a2110 and the needle seat 1200. A convex block 1104 corresponding to the groove 2111 is provided on the column body 1102;

[0113] A second needle wing 2200, a collar b2210 is connected to the second needle wing 2200. The collar b2210 is movably sleeved on the column body;

[0114] The snap - fit component 2300 is respectively arranged on the first needle wing 2100 and the second needle wing 2200, and is used to fit and fix the second needle wing 2200 to the first needle wing 2100;

[0115] Anti - slip patterns are provided on the sides of the first needle wing 2100 and the second needle wing 2200 facing the skin.

[0116] Specifically, when using the blood collection needle 1000 to pierce the skin of a patient, the first needle wing 2100 and the second needle wing 2200 are fitted through the snap - fit component 2300. After holding the first needle wing 2100 and piercing the skin with the needle, the second needle wing 2200 is opened. The first needle wing 2100 and the second needle wing 2200 are arranged in a folded form, so that the first needle wing 2100 and the second needle wing 2200 can better fit the user's skin during use. And when in use, the first needle wing 2100 and the second needle wing 2200 are folded for use. The first needle wing 2100 is fixedly arranged with the cylinder 1102, and the second needle wing 2200 is folded with the first needle wing 2100, avoiding the situation that during the process of holding the needle wing to pierce the skin with the needle, when the first needle wing 2100 or the second needle wing 2200 is not fixed to the cylinder 1102, the position of the needle head rotates or deviates. Through the anti - slip patterns provided on the sides of the first needle wing 2100 and the second needle wing 2200 facing the skin, the friction with the skin is increased, playing a certain role in fixing the needle head.

[0117] It should be noted that the collar a 2110 and the collar b 2210 are arranged in an alternating manner, and the sum of the lengths of the collar a 2110 and the collar b 2210 is equal to the length on the cylinder 1102. Through the corresponding protrusions 1104 and grooves 2111 provided between the collar a 2110 and the cylinder 1102, the position of the first needle wing 2100 on the cylinder 1102 is fixed, and the collar b 2210 is rotatably connected to the cylinder 1102.

[0118] Please refer to Figure 11 , preferably,

[0119] The snap - fit component 2300 includes:

[0120] A limit protrusion 2310, and the limit protrusion 2310 is installed on the first needle wing 2100;

[0121] A card slot 2320, the card slot 2320 is opened on the second needle wing 2200, and the position of the card slot 2320 corresponds to that of the limit protrusion 2310.

[0122] Specifically, through the engagement of the limiting bump 2310 and the card slot 2320, the second needle wing 2200 can be fixed to the first needle wing 2100. The first needle wing 2100 is fixedly arranged with the column 1102. The second needle wing 2200 is folded with the first needle wing 2100, and the second needle wing 2200 is fixed through the engagement of the limiting bump 2310 and the card slot 2320. The second needle wing 2200 is separated from the first needle wing 2100 through the separation of the limiting bump 2310 and the card slot 2320, ensuring that the position of the second needle wing 2200 is fixed during the injection process and can move after the needle is inserted into the skin, avoiding the rotation or deviation of the needle position during the process of inserting the needle into the skin while holding the needle wing when the first needle wing 2100 or the second needle wing 2200 is not fixed to the column 1102.

[0123] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A blood collection needle, characterized in that, Comprising: A housing, a limiting hole is formed in the housing, and a protection component is further arranged in the housing for limiting the position of the needle base; A needle base, a limiting component is arranged on the needle base, the limiting component is movably engaged with the limiting hole, and the needle base movably passes through the protection component; A first spring, the first spring is sleeved on the needle base, and two ends of the first spring are respectively connected with the protection component and the limiting component; A housing cover, the housing cover is movably engaged with the housing, a protection component for protecting the limiting component is installed in the housing cover, and an opening for the limiting component to pass through is formed in the housing cover; The protection component includes: A protection block, the protection block is installed on the inner wall of the housing, a second through hole for the needle base to pass through is formed in the protection block, and the protection block is fixedly connected with one end of the first spring; A limiting plate, the limiting plate is arranged in the second through hole, and a second spring is connected between the limiting plate and the protection block; A pulley, the pulley is installed on the limiting plate, the pulley rolls along the surface of the needle base, and a depression adapted to the pulley is formed on the surface of the needle base; The housing cover includes: A first cover body, a first sliding groove adapted to the first slider is formed in the first cover body; A second cover body, a protrusion is arranged at the bottom of the second cover body, and the protection component is installed on the protrusion; The protection component includes: A buffer plate, a cavity for the buffer plate to move is formed inside the protrusion; A third spring, two ends of the third spring are respectively connected with the cavity inside the protrusion and the buffer plate; When the limiting component is engaged with the limiting hole, the needle base penetrates through the second through hole, the pulley on the limiting plate is located in the depression on the surface of the needle base, and the second spring contracts. When the limiting component is separated from the limiting hole, the first spring expands. Under the action of the first spring, the needle base disengages from the second through hole, the pulley rolls in the depression, and the second spring jacks up the limiting plate to reduce the area inside the second through hole.

2. A blood collection needle according to claim 1, characterized in that The housing includes: A cylinder, the cylinder is fixedly connected with the housing, a first through hole is formed in the cylinder, the first through hole is communicated with the cavity inside the housing, the needle base is movably connected with the first through hole, and a needle wing is sleeved on the cylinder.

3. A blood collection needle according to claim 1, characterized in that The limiting component includes: A fixing block, a base is arranged at the bottom of the fixing block, the size of the base is larger than that of the fixing block, and the fixing block and the base are arranged in an L shape. The base is fixedly connected with the needle base, and the base is also connected with the end of the first spring different from the protection block; Elastic pieces, the elastic pieces are symmetrically installed on both sides of the fixing block, and a clamping block is connected to the elastic piece, and the clamping block is engaged with the limiting hole; A first slider, the first slider is installed on the outside of the fixing block.

4. A blood collection needle according to claim 3, characterized in that Fourth through holes for the infusion tube to pass through are formed in both the fixing block and the needle base.

5. A blood collection needle according to claim 2, characterized in that the needle wings include: a first needle wing, a collar a is connected to the first needle wing, the collar a is fixedly sleeved on the cylinder, a groove is provided at the connection between the collar a and the needle seat, and a bump corresponding to the groove is provided on the cylinder; a second needle wing, a collar b is connected to the second needle wing, and the collar b is movably sleeved on the cylinder; a clamping component, which is respectively arranged on the first needle wing and the second needle wing for fitting and fixing the second needle wing and the first needle wing.

6. A blood collection needle according to claim 5, characterized in that the clamping component includes: a limiting bump, which is installed on the first needle wing; a clamping groove, which is opened on the second needle wing, and the position of the clamping groove corresponds to that of the limiting bump.

7. A blood collection needle according to claim 5, characterized in that anti-slip patterns are provided on the sides of the first needle wing and the second needle wing facing the skin.

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