A blood collection needle assembly capable of adapting to and regulating the blood flow rate of blood collection

Abstract

The present invention discloses a blood collection needle assembly that can adapt to adjusting the blood flow rate of blood collection, relates to the technical field of blood collection needles, and includes a base and a control assembly, wherein a column is inserted in the center of the base, and a bottom frame is symmetrically fixedly connected to the outer side of the upper part of the column, and the control assembly is arranged in the bottom frame, and the control assembly includes a control frame, an adjustment tube, a transfer chamber, a joint, a partition, a piston, a connecting rod, an adjustment spring, an adjustment groove, a bracket and an adjustment wheel, a control frame is arranged in the bottom frame, and an adjustment tube is arranged inside the control frame, a transfer chamber is fixedly connected above the adjusting tube, and a joint is fixedly connected below the adjusting tube, a partition is fixedly connected in the transfer chamber, and a piston is arranged on the right side of the partition, a connecting rod is fixedly connected below the piston, and an adjustment spring is fitted on the outer side of the lower part of the connecting rod. When the present invention is used for blood collection, no manual operation is required, and the blood flow rate can be adjusted automatically to avoid too slow or too fast flow rate.

Description

Technical Field

[0001] The invention relates to the technical field of blood collection needles, in particular to a blood collection needle assembly capable of adapting to and regulating the blood flow rate of blood collection. Background Art

[0002] A lancet is an instrument used to collect blood samples during medical examinations. It consists of a needle and a needle rod. The needle is located at the head of the needle rod, and a sheath is slidably connected to the needle rod. A return spring is provided between the sheath and the needle rod, and the initial position of the sheath is located at the head of the needle and the needle rod. When using a lancet for blood collection, the blood flow rate and collection volume will affect the quality of the collected blood.

[0003] For example, the invention patent with application number CN201910874400.8 discloses a blood collection needle and a blood collection needle assembly. The boss in the invention patent is suitable for covering the needle tip after the needle cap is removed from the needle tip, but the invention patent is not convenient for controlling the blood collection speed when blood is collected.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a blood collection needle assembly that can adapt to and adjust the blood flow rate during blood collection is proposed. Summary of the invention

[0005] The object of the present invention is to provide a blood collection needle assembly that can adapt to and adjust the blood flow rate during blood collection, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a blood collection needle assembly that can adapt to adjusting the blood flow rate of blood collection, comprising a base and a control assembly, a column is inserted in the center of the base, and a bottom frame is symmetrically fixedly connected to the outer side of the upper part of the column, the control assembly is arranged in the bottom frame, the control assembly comprises a control frame, an adjusting tube, a transfer chamber, a joint, a partition, a piston, a connecting rod, an adjusting spring, an adjusting groove, a bracket and an adjusting wheel, a control frame is arranged in the bottom frame, and an adjusting tube is arranged on the inner side of the control frame, a transfer chamber is fixedly connected above the adjusting tube, and a joint is fixedly connected below the adjusting tube, a partition is fixedly connected in the transfer chamber, and a piston is arranged on the right side of the partition, a connecting rod is fixedly connected below the piston, and an adjusting spring is fitted on the outer side of the lower part of the connecting rod, adjusting grooves are symmetrically opened on the front and rear sides of the right part of the control frame, and a bracket is embedded and connected in the adjusting groove, and the lower end of the bracket is rotatably connected to the adjusting wheel.

[0007] Furthermore, the two ends of the adjusting spring are respectively fixedly connected to the transfer chamber and the bracket, and the bracket is elastically connected to the transfer chamber through the adjusting spring. The bracket is slidingly connected to the control frame through the adjusting groove, the adjusting wheel is fitted with the adjusting tube, and the piston is fitted with the partition and the inner wall of the transfer chamber.

[0008] Furthermore, a sliding rod is fixedly connected inside the bottom frame, and a through opening is opened in the lower part of the bottom frame, a support plate is slidably connected to the sliding rod, and a storage spring is fixedly connected above the support plate, an electromagnetic block is fixedly connected to the lower surface of the inner wall of the bottom frame, the support plate is elastically connected to the bottom frame through the storage spring, and the support plate is fixedly connected to the control frame.

[0009] Furthermore, a mounting plate is fixedly connected to the top of the column, and a mounting groove is provided at the edge of the mounting plate. A connecting tube is fixedly connected to the top of the transfer chamber, and a needle is fixedly connected to the upper end of the connecting tube. The needle is engaged with the mounting plate through the mounting groove.

[0010] Furthermore, a placement cavity is symmetrically opened around the lower part of the base, and a return spring is fixedly connected in the placement cavity, a placement plate is fixedly connected to the upper end of the return spring, and a blood collection tube is clamped above the placement plate, and a tube cover is clamped on the upper end of the blood collection tube, the placement plate is elastically connected to the placement cavity through the return spring, and the placement plate is slidably connected to the base through the placement cavity.

[0011] Furthermore, a sliding cavity is provided above the side of the placement cavity close to the column, a pull rod is fixedly connected to the side of the placement plate close to the column, and a connecting rod is symmetrically rotatably connected to the upper end of the pull rod, a splint is rotatably connected to the upper end of the connecting rod, and the splint is slidably connected to the base, and the pull rod is slidably connected to the sliding cavity.

[0012] Furthermore, a slide groove is provided on the side of the placement cavity away from the column, and a slider is slidably connected in the slide groove, a scraper is fixedly connected between the sliders, and a label is provided on the side surface of the base between the slide grooves.

[0013] Furthermore, a fixing component is symmetrically arranged around the lower end of the column, and the fixing component includes a card cavity, an electromagnetic sheet and a retaining spring. The electromagnetic sheet is fixedly connected to the side of the card cavity away from the placement cavity, and the retaining spring is fixedly connected to the side of the card cavity close to the placement cavity.

[0014] Furthermore, the fixing assembly also includes a clamping rod and an adsorption plate. The clamping rod is fitted on the inner side of the clamping spring, and one end of the clamping rod close to the electromagnetic sheet is fixedly connected to the adsorption plate. The clamping rod is slidably connected to the clamping cavity.

[0015] Furthermore, the fixing assembly also includes a card plate, a card port and a card slot. The other end of the card rod is fixedly connected to the card plate, and a card port is provided on the surface of the card plate. A card slot is provided on the side of the placement cavity close to the base, and the card plate is engaged with the base through the card slot. The card plate is fixedly connected to the retaining spring, and the placement plate is engaged with the card plate through the card port.

[0016] The present invention provides a blood collection needle assembly that can adapt to and adjust the blood flow rate during blood collection, and has the following beneficial effects: when blood is collected, no manual operation is required, and the blood flow rate can be adjusted automatically to avoid the flow rate being too slow or too fast.

[0017] 1. When the present invention is performing blood sampling, the blood will be temporarily stored in the transfer chamber. When the blood flow rate is too fast, the blood in the transfer chamber will increase, thereby pressing the piston down under the action of gravity, and the connecting rod drives the adjusting wheel to descend through the bracket to compress the adjusting tube, thereby adjusting the blood flow rate. The adjusting groove can limit the bracket to prevent the bracket from deviating when moving, resulting in the inability of the adjusting wheel to compress the adjusting tube. After the blood sampling is completed, the adjusting spring can apply tension to the bracket to assist its reset.

[0018] 2. When the present invention is used for blood sampling, the electromagnetic block is energized to adsorb the support plate, thereby lowering the control frame and inserting the connector into the tube cover to store the collected blood. When blood sampling is not taking place, the electromagnetic block is deenergized, and the storage spring can raise the support plate and store the control frame into the bottom frame to prevent the connector from being exposed to the outside and adhered to dust. The sliding rod can limit the support plate to prevent the support plate from deflecting during movement.

[0019] 3. When the column is inserted into the base, the electromagnetic sheet is energized, and the electromagnetic sheet can adsorb the adsorption plate, thereby receiving the card plate into the card cavity. When the column is inserted into the base, the electromagnetic sheet is de-energized, and the card plate can pop out under the action of the retaining spring, so that the card plate is engaged with the base through the retaining groove to fix the column to prevent the column from falling off during use. The retaining rod can limit the card plate to prevent the card plate from tilting.

[0020] 4. When the blood collection tube is placed in the placement cavity, the blood collection tube can press the placement plate down to compress the reset spring and drive the pull rod to descend at the same time. The pull rod drives the clamping plate to slide towards each other on the base through the connecting rod. When the placement plate contacts the clamping plate, the clamping plate can be pressed into the clamping groove through the inclined surface of the clamping plate. After the placement plate is flush with the clamping port, the clamping plate rebounds under the action of the clamping spring, so that the placement plate is engaged with the clamping plate through the clamping port, thereby fixing the placement plate. At this time, the clamping plate contacts the blood collection tube to clamp and fix the blood collection tube.

[0021] 5. When taking out the blood collection tube, the electromagnetic sheet of the present invention is energized to adsorb the adsorption plate, and the card plate is pulled into the card slot through the card rod to release the restriction on the placement plate. The placement plate rises under the action of the reset spring to push the blood collection tube out of the placement cavity. At the same time, the pull rod drives the clamping plate to move through the connecting rod to release the restriction on the blood collection tube. When the placement plate moves up, it can drive the slider to move in the slide slot, thereby driving the scraper to peel the label from the base, without the need to manually tear off the label. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the overall structure of a blood collection needle assembly capable of adjusting the blood flow rate of blood collection according to the present invention from a top view;

[0023] Figure 2 The present invention is a blood collection needle assembly capable of adjusting the blood flow rate of blood collection Figure 1 The enlarged structural diagram at A in the middle;

[0024] Figure 3 This is a schematic cross-sectional view of a control component of a blood collection needle assembly that can adapt to adjusting the blood flow rate of blood collection according to the present invention;

[0025] Figure 4 The present invention is a blood collection needle assembly capable of adjusting the blood flow rate of blood collection Figure 1 The enlarged structural diagram at B in the middle;

[0026] Figure 5 The present invention is a blood collection needle assembly capable of adjusting the blood flow rate of blood collection Figure 1 The enlarged structural diagram at C in the middle;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of a pull rod of a blood collection needle assembly capable of adjusting the blood flow rate of blood collection according to the present invention;

[0028] Figure 7 This is a schematic diagram of a top view of the base of a blood collection needle assembly that can adapt to adjusting the blood flow rate of blood collection according to the present invention;

[0029] Figure 8 The present invention is a schematic diagram of the three-dimensional structure of a placement plate of a blood collection needle assembly capable of adjusting the blood flow rate during blood collection.

[0030] In the figure: 1, base; 2, column; 3, bottom frame; 4, control assembly; 401, control frame; 402, adjustment pipe; 403, transfer chamber; 404, joint; 405, partition; 406, piston; 407, connecting rod; 408, adjustment spring; 409, adjustment groove; 410, bracket; 411, adjustment wheel; 5, slide bar; 6, through port; 7, support plate; 8, storage spring; 9, electromagnetic block; 10, placement plate; 11, placement groove; 12, connecting pipe; 13, Needle; 14, placement cavity; 15, return spring; 16, placement plate; 17, blood collection tube; 18, tube cover; 19, sliding cavity; 20, pull rod; 21, connecting rod; 22, splint; 23, slide groove; 24, slider; 25, scraper; 26, label; 27, fixing component; 2701, card cavity; 2702, electromagnetic sheet; 2703, retaining spring; 2704, card rod; 2705, adsorption plate; 2706, card plate; 2707, bayonet; 2708, card groove. DETAILED DESCRIPTION

[0031] See also Figures 1 to 8The present invention provides a technical solution: a blood collection needle assembly that can adapt to adjusting the blood flow rate of blood collection, including a base 1 and a control assembly 4, a column 2 is inserted in the center of the base 1, and a bottom frame 3 is symmetrically fixedly connected to the outer side of the upper part of the column 2, and the control assembly 4 is arranged in the bottom frame 3. The control assembly 4 includes a control frame 401, an adjustment tube 402, a transfer chamber 403, a joint 404, a partition 405, a piston 406, a connecting rod 407, an adjustment spring 408, an adjustment groove 409, a bracket 410 and an adjustment wheel 411. The control frame 401 is arranged in the bottom frame 3, and the control frame 401 is arranged in the control frame 401. An adjusting tube 402 is arranged on the side, a transfer chamber 403 is fixedly connected above the adjusting tube 402, and a joint 404 is fixedly connected below the adjusting tube 402, a partition 405 is fixedly connected inside the transfer chamber 403, and a piston 406 is arranged on the right side of the partition 405, a connecting rod 407 is fixedly connected below the piston 406, and an adjusting spring 408 is fitted on the outer side of the lower part of the connecting rod 407, adjusting grooves 409 are symmetrically opened on the front and rear sides of the right part of the control frame 401, and a bracket 410 is embedded and connected in the adjusting groove 409, and an adjusting wheel 411 is rotatably connected to the lower end of the bracket 410.

[0032] See also Figures 1 to 3 The two ends of the adjusting spring 408 are fixedly connected to the transfer chamber 403 and the bracket 410 respectively, and the bracket 410 is elastically connected to the transfer chamber 403 through the adjusting spring 408. The bracket 410 is slidably connected to the control frame 401 through the adjusting groove 409. The adjusting wheel 411 fits with the adjusting tube 402. The piston 406 fits with the partition plate 405 and the inner wall of the transfer chamber 403. The bottom frame 3 is fixedly connected with a slide rod 5, and a through hole 6 is opened at the lower part of the bottom frame 3. The slide rod 5 is slidably connected with a support plate 7. A receiving spring 8 is fixedly connected to the top of the support plate 7, an electromagnetic block 9 is fixedly connected to the lower surface of the inner wall of the bottom frame 3, the support plate 7 is elastically connected to the bottom frame 3 through the receiving spring 8, and the support plate 7 is fixedly connected to the control frame 401, a placement plate 10 is fixedly connected to the top of the column 2, and a placement groove 11 is provided on the edge of the placement plate 10, a connecting tube 12 is fixedly connected to the top of the transfer chamber 403, and a needle 13 is fixedly connected to the upper end of the connecting tube 12, and the needle 13 is engaged with the placement plate 10 through the placement groove 11;

[0033] The specific operation is as follows: during blood collection, the blood will be temporarily stored in the transfer chamber 403. When the blood flow rate is too fast, the blood in the transfer chamber 403 will increase, thereby pressing the piston 406 down under the action of gravity, and the connecting rod 407 drives the regulating wheel 411 to descend through the bracket 410 to compress the regulating tube 402, thereby adjusting the blood flow rate. The regulating groove 409 can limit the bracket 410 to prevent the bracket 410 from deviating when moving, causing the regulating wheel 411 to be unable to compress the regulating tube 402. After the blood collection is completed, The adjusting spring 408 can apply a pulling force to the bracket 410 to assist its resetting. When blood is collected, the electromagnetic block 9 is energized to adsorb the support plate 7, thereby lowering the control frame 401 and inserting the connector 404 into the tube cover 18 to store the collected blood. When blood is not collected, the electromagnetic block 9 is powered off, and the storage spring 8 can raise the support plate 7 and store the control frame 401 in the bottom frame 3 to prevent the connector 404 from being exposed to the outside and adhering to dust. The sliding rod 5 can limit the support plate 7 to prevent the support plate 7 from deflecting during movement.

[0034] See also Figure 1 , Figures 4 to 8The lower part of the base 1 is symmetrically provided with a placement cavity 14, and a reset spring 15 is fixedly connected in the placement cavity 14, and a placement plate 16 is fixedly connected to the upper end of the reset spring 15, and a blood collection tube 17 is clamped and arranged above the placement plate 16, and a tube cover 18 is clamped and arranged on the upper end of the blood collection tube 17, and the placement plate 16 is elastically connected to the placement cavity 14 through the reset spring 15, and the placement plate 16 is slidably connected to the base 1 through the placement cavity 14, and a sliding cavity 19 is arranged above the side of the placement cavity 14 close to the column 2, and the placement plate 16 is close to the column 2 is fixedly connected with a pull rod 20, and the upper end of the pull rod 20 is symmetrically connected to a connecting rod 21, the upper end of the connecting rod 21 is rotatably connected to a clamping plate 22, and the clamping plate 22 is slidably connected to the base 1, the pull rod 20 is slidably connected to the sliding cavity 19, a sliding groove 23 is provided on the side of the placement cavity 14 away from the column 2, and a slider 24 is slidably connected in the sliding groove 23, a scraper 25 is fixedly connected between the sliders 24, a label 26 is provided on the side surface of the base 1 between the sliding grooves 23, and a fixed component 2 is symmetrically provided around the lower end of the column 2 7. The fixing assembly 27 includes a card cavity 2701, an electromagnetic sheet 2702 and a spring 2703. The side of the card cavity 2701 away from the placement cavity 14 is fixedly connected to the electromagnetic sheet 2702, and the side of the card cavity 2701 close to the placement cavity 14 is fixedly connected to the spring 2703. The fixing assembly 27 also includes a clamping rod 2704 and an adsorption plate 2705. The inner side of the spring 2703 is fitted with the clamping rod 2704, and the end of the clamping rod 2704 close to the electromagnetic sheet 2702 is fixedly connected to the adsorption plate 2705. 704 is slidably connected with the card cavity 2701, the fixing assembly 27 also includes a card plate 2706, a bayonet 2707 and a card slot 2708, the other end of the card rod 2704 is fixedly connected with the card plate 2706, and the card plate 2706 surface is provided with a bayonet 2707, the placement cavity 14 is provided with a card slot 2708 on the side close to the base 1, and the card plate 2706 is engaged with the base 1 through the card slot 2708, the card plate 2706 is fixedly connected with the clamping spring 2703, and the placement plate 16 is engaged with the card plate 2706 through the bayonet 2707;

[0035] The specific operation is as follows: when the column 2 is inserted into the base 1, the electromagnetic sheet 2702 is energized, and the electromagnetic sheet 2702 can adsorb the adsorption plate 2705, so that the card plate 2706 is received in the card cavity 2701; when the column 2 is inserted into the base 1, the electromagnetic sheet 2702 is powered off, and the card plate 2706 can be ejected under the action of the retaining spring 2703, so that the card plate 2706 is engaged with the base 1 through the card slot 2708, and the column 2 is fixed to avoid the column 2 from being stuck during use. When the column 2 falls off, the clamping rod 2704 can limit the clamping plate 2706 to prevent the clamping plate 2706 from deflecting. When the blood collection tube 17 is placed in the placement chamber 14, the blood collection tube 17 can press the placement plate 16 down to compress the reset spring 15, and at the same time drive the pull rod 20 to descend. The pull rod 20 drives the clamping plate 22 to slide on the base 1 through the linkage rod 21. When the placement plate 16 contacts the clamping plate 2706, the clamping plate 2706 can be moved by the inclined surface of the clamping plate 2706. 6 is pressed into the card slot 2708, and after the placement plate 16 is flush with the card slot 2707, the card plate 2706 rebounds under the action of the clamping spring 2703, so that the placement plate 16 is engaged with the card plate 2706 through the card slot 2707, thereby fixing the placement plate 16. At this time, the clamping plate 22 contacts the blood collection tube 17 to clamp and fix the blood collection tube 17. When the blood collection tube 17 is taken out, the electromagnetic sheet 2702 is energized to adsorb the adsorption plate 2705, and the card plate is moved by the clamping rod 2704. 2706 is pulled into the card slot 2708 to release the restriction on the placement plate 16. The placement plate 16 rises under the action of the reset spring 15, and the blood collection tube 17 is pushed out of the placement cavity 14. At the same time, the pull rod 20 drives the clamping plate 22 to move through the connecting rod 21 to release the restriction on the blood collection tube 17. When the placement plate 16 moves up, it can drive the slider 24 to move in the slide groove 23, thereby driving the scraper 25 to peel the label 26 from the base 1, and there is no need to manually tear off the label 26.

[0036] In summary, the blood collection needle assembly that can adapt to and adjust the blood flow rate of blood collection, when in use, first insert the column 2 on the base 1, and energize the electromagnetic sheet 2702, the electromagnetic sheet 2702 can adsorb the adsorption plate 2705, so that the card plate 2706 is received in the card cavity 2701, when the column 2 is inserted into the base 1, the electromagnetic sheet 2702 is powered off, and the card plate 2706 can pop out under the action of the retaining spring 2703, so that the card plate 2706 is engaged with the base 1 through the retaining groove 2708, and the column 2 is fixed to prevent the column 2 from falling off during use, the retaining rod 2704 can limit the card plate 2706 to prevent the card plate 2706 from being skewed, and when the blood collection tube 17 is placed in the placement cavity 14, the blood collection tube 17 can press the placement plate 16 down to reset the return spring 15 is compressed, and at the same time, the pull rod 20 is driven to descend. The pull rod 20 drives the clamping plate 22 to slide on the base 1 through the connecting rod 21. When the placement plate 16 contacts the clamping plate 2706, the clamping plate 2706 can be pressed into the clamping groove 2708 through the inclined surface of the clamping plate 2706. After the placement plate 16 is flush with the clamping port 2707, the clamping plate 2706 rebounds under the action of the clamping spring 2703, so that the placement plate 16 is clamped with the clamping plate 2706 through the clamping port 2707, thereby fixing the placement plate 16. At this time, the clamping plate 22 contacts the blood collection tube 17, clamps and fixes the blood collection tube 17, and then sticks the label 26 on the corresponding blood collection tube 17. When blood is collected, the needle 13 is first taken out of the placement slot 11, and the electromagnetic block 9 is energized to adsorb the support plate 7, thereby controlling The frame 401 is lowered, and the connector 404 is inserted into the tube cover 18 to store the collected blood. When blood is not collected, the electromagnetic block 9 is powered off, and the storage spring 8 can raise the support plate 7 to store the control frame 401 in the bottom frame 3 to prevent the connector 404 from being exposed to the outside and adhering to dust. The slide bar 5 can limit the support plate 7 to prevent the support plate 7 from deflecting during movement. When blood is collected, the blood will be temporarily stored in the transfer chamber 403. When the blood flow rate is too fast, the blood in the transfer chamber 403 will increase, thereby pressing the piston 406 under the action of gravity, and the connecting rod 407 drives the adjusting wheel 411 to descend through the bracket 410 to compress the adjusting tube 402, thereby adjusting the blood flow rate, and the adjusting groove 409 can limit the bracket 410. , to prevent the bracket 410 from deviating when moving, so that the adjusting wheel 411 cannot press the adjusting tube 402. After the blood sampling is completed, the adjusting spring 408 can apply a pulling force to the bracket 410 to assist it in resetting. When taking out the blood sampling tube 17, the electromagnetic sheet 2702 is energized to adsorb the adsorption plate 2705, and the card plate 2706 is pulled into the card slot 2708 through the card rod 2704 to release the restriction on the placement plate 16. The placement plate 16 rises under the action of the reset spring 15, and the blood sampling tube 17 is pushed out of the placement cavity 14. At the same time, the pull rod 20 drives the clamping plate 22 to move through the linkage rod 21 to release the restriction on the blood sampling tube 17. When the placement plate 16 moves up, it can drive the slider 24 to move in the slide groove 23, thereby driving the scraper 25 to peel the label 26 from the base 1.There is no need to manually tear off the label 26.

[0037] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A blood collection needle assembly capable of adapting to and adjusting the blood flow rate during blood collection, It is characterized in that The invention comprises a base (1) and a control assembly (4), wherein a column (2) is plugged into the center of the base (1), and a bottom frame (3) is symmetrically fixedly connected to the outer side of the upper part of the column (2), and the control assembly (4) is arranged in the bottom frame (3), and the control assembly (4) comprises a control frame (401), an adjustment tube (402), a transfer chamber (403), a joint (404), a partition (405), a piston (406), a connecting rod (407), an adjustment spring (408), an adjustment groove (409), a bracket (410) and an adjustment wheel (411), wherein the control frame (401) is arranged in the bottom frame (3), and an adjustment tube (402) is arranged inside the control frame (401), and the transfer chamber (411) is fixedly connected to the top of the adjustment tube (402). 403), and a joint (404) is fixedly connected to the lower part of the regulating tube (402), a partition (405) is fixedly connected inside the transfer chamber (403), and a piston (406) is arranged on the right side of the partition (405), a connecting rod (407) is fixedly connected below the piston (406), and an adjusting spring (408) is closely arranged on the outer side of the lower part of the connecting rod (407), and an adjusting groove (409) is symmetrically opened on the front and rear sides of the right part of the control frame (401), and a bracket (410) is embedded and connected in the adjusting groove (409), and the lower end of the bracket (410) is rotatably connected to an adjusting wheel (411), and the two ends of the adjusting spring (408) are respectively fixedly connected to the transfer chamber (403) and the bracket (410), and the bracket (410) ) is elastically connected to the transfer chamber (403) through an adjusting spring (408), the bracket (410) is slidably connected to the control frame (401) through an adjusting groove (409), the adjusting wheel (411) is in contact with the adjusting tube (402), the piston (406) is in contact with the partition (405) and the inner wall of the transfer chamber (403), a sliding rod (5) is fixedly connected to the bottom frame (3), and a through hole (6) is opened at the lower part of the bottom frame (3), a support plate (7) is slidably connected to the sliding rod (5), and a storage spring (8) is fixedly connected to the upper part of the support plate (7), an electromagnetic block (9) is fixedly connected to the lower surface of the inner wall of the bottom frame (3), the support plate (7) is elastically connected to the bottom frame (3) through the storage spring (8), and the support plate (7) is in contact with the control frame (401). The frame (401) is fixedly connected, and a fixing assembly (27) is symmetrically arranged around the lower end of the column (2), and the fixing assembly (27) comprises a card cavity (2701), an electromagnetic sheet (2702) and a retaining spring (2703). The side of the card cavity (2701) away from the placement cavity (14) is fixedly connected to the electromagnetic sheet (2702), and the side of the card cavity (2701) close to the placement cavity (14) is fixedly connected to the retaining spring (2703). The fixing assembly (27) also comprises a clamping rod (2704) and an adsorption plate (2705). The clamping rod (2704) is fitted on the inner side of the retaining spring (2703), and the end of the card rod (2704) close to the electromagnetic sheet (2702) is fixedly connected to the adsorption plate (2705).The card rod (2704) is slidably connected to the card cavity (2701).

2. A blood collection needle assembly capable of adapting and adjusting the blood flow rate of blood collection according to claim 1, It is characterized in that A mounting plate (10) is fixedly connected to the top of the upright column (2), and a mounting groove (11) is provided on the edge of the mounting plate (10). A connecting tube (12) is fixedly connected to the top of the transfer chamber (403), and a needle (13) is fixedly connected to the upper end of the connecting tube (12). The needle (13) is engaged with the mounting plate (10) via the mounting groove (11).

3. A blood collection needle assembly capable of adapting and adjusting the blood flow rate of blood collection according to claim 1, It is characterized in that The base (1) is symmetrically provided with a placement cavity (14) around the lower part, and a return spring (15) is fixedly connected in the placement cavity (14); the upper end of the return spring (15) is fixedly connected to a placement plate (16), and a blood collection tube (17) is clamped and arranged above the placement plate (16); a tube cover (18) is clamped and arranged at the upper end of the blood collection tube (17); the placement plate (16) is elastically connected to the placement cavity (14) through the return spring (15), and the placement plate (16) is slidably connected to the base (1) through the placement cavity (14).

4. A blood collection needle assembly capable of adapting and adjusting the blood flow rate of blood collection according to claim 3, It is characterized in that A sliding cavity (19) is arranged above the side of the placement cavity (14) close to the column (2); a pull rod (20) is fixedly connected to the side of the placement plate (16) close to the column (2); the upper end of the pull rod (20) is symmetrically rotatably connected to a connecting rod (21); the upper end of the connecting rod (21) is rotatably connected to a clamping plate (22); the clamping plate (22) is slidably connected to the base (1); and the pull rod (20) is slidably connected to the sliding cavity (19).

5. A blood collection needle assembly capable of adapting and adjusting the blood flow rate of blood collection according to claim 4, It is characterized in that A slide groove (23) is provided on a side of the placement cavity (14) away from the column (2), and a slider (24) is slidably connected in the slide groove (23), a scraper (25) is fixedly connected between the sliders (24), and a label (26) is provided on the side surface of the base (1) between the slide grooves (23).

6. A blood collection needle assembly capable of adapting and adjusting the blood flow rate of blood collection according to claim 5, It is characterized in that The fixing assembly (27) further comprises a clamping plate (2706), a clamping port (2707) and a clamping slot (2708); the other end of the clamping rod (2704) is fixedly connected to the clamping plate (2706), and a clamping port (2707) is provided on the surface of the clamping plate (2706); a clamping slot (2708) is provided on a side of the placement cavity (14) close to the base (1), and the clamping plate (2706) is clamped with the base (1) via the clamping slot (2708); the clamping plate (2706) is fixedly connected to the clamping spring (2703), and the placement plate (16) is clamped with the clamping plate (2706) via the clamping port (2707).

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