CN113000084B - A accuse volume adds device for human influenza vaccine detects - Google Patents

Abstract

The invention discloses a volume-controlled adding device for human influenza vaccine detection, relates to the technical field of quantitative adding devices, and solves the problem that existing syringes cannot automatically add reaction reagents in equal amounts multiple times. A volume-controlled adding device for human influenza vaccine detection, comprising a quantitative control rod; the bottom end of the quantitative control rod body is rotatably connected to the inside of the ring body of the linkage push-pull ring. The device can control and fix the use height of the top positioning shell through the quantitative control rod, so that each time the linkage push-pull ring is pulled, the compression stroke of the top positioning shell driven by the linkage push-pull ring is the same each time, and when the linkage push-pull ring is released, The linked push-pull ring and the top positioning shell can be automatically reset under the action of the reset top spring, so as to realize multiple equal amounts of reagents added to the vaccine sample, without the need to control the compression stroke of the piston rod each time the reagents are added.

Description

A volume-controlled addition device for human influenza vaccine detection

technical field

The invention belongs to the technical field of quantitative addition devices, and more specifically relates to a quantitative addition device for human influenza vaccine detection.

Background technique

The volume-controlled adding device is used to control the injection of the liquid used for vaccine testing, which can be added accurately and quantitatively. Influenza is an acute respiratory infectious disease caused by influenza virus that can cause large-scale epidemics. Compared with the common cold, influenza has more symptoms It is more serious, more contagious, and antibiotic treatment is ineffective, but influenza is preventable. Influenza vaccination is the most effective prevention method at present. Influenza vaccine is used to prevent influenza (flu for short) caused by influenza virus The vaccine is suitable for any healthy person who may be infected with the influenza virus. It is vaccinated once a year before the epidemic season, and immunity can last for one year.

For example, in the patent with the application number: CN201911286540.X, a vaccine frozen storage detection device and method of use are disclosed, including a freezer box, an electric control box is installed on one side of the freezer box, and one side of the electric control box A heat dissipation hole is provided, a motor is installed inside the electric control box, and a rotating rod is provided at the output end of the motor, the surface of the rotating rod is threadedly connected with a vaccine installation cylinder, and one side of the vaccine installation cylinder penetrates There are oblong holes. Through the cold air pipe running through the inside of the cold air conveying tank, through the fit between the air outlet hole and the cold air dredging hole, the cold air dredging hole cooperates with the cold air outlet hole to evenly discharge the cold air to the surface of the vaccine bottle, and the vaccine is installed through the drive rod Rotation of the cylinder, on the one hand, can make the cold air contact with the vaccine bottle evenly, on the other hand, it is convenient to take the vaccine bottle from the box door. live speed.

At present, vaccines will go through multiple tests and experiments before they are put into use. When testing and testing vaccines, in order to ensure the accuracy of experiments or tests, multiple groups of vaccine samples are often tested together, and syringes are used in this process. Add equal amounts of reagents to groups of vaccine samples.

When adding reaction reagents to the vaccine with existing syringes, it is necessary to add the same amount of reaction reagents to the vaccine multiple times. The amount of reaction reagents added to each group of vaccine samples is the same, but the existing syringes cannot automatically add the same amount of reaction reagents multiple times, resulting in a time-consuming, labor-intensive, and low-practicability process.

Therefore, in view of this, the existing structure and defects are studied and improved, and a controlled adding device for human influenza vaccine detection is provided, in order to achieve the purpose of having more practical value.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a volume-controlled addition device for human influenza vaccine detection, to solve the problem of adding reaction reagents to the vaccine in equal amounts multiple times when existing syringes add reaction reagents to the vaccine, The steps are cumbersome, and when adding reaction reagents, inspectors need to pay special attention to the amount of reaction reagents added to each group of samples to ensure that the amount of reaction reagents added to each group of vaccine samples is the same, but the existing syringes cannot meet the requirements of automatic multiple additions of equal amounts The reaction reagents lead to the problems of time-consuming and labor-intensive process, high labor intensity and low practicability.

The purpose and effect of the present invention's volume-controlled addition device for human influenza vaccine detection are achieved by the following specific technical means:

A volume-controlled adding device for human influenza vaccine detection, including a piston rod, a linkage push-pull ring, a positioning swivel, a positioning shell group, a one-way limit block and a quantitative control rod; the piston rod is inserted into the suction needle The inside of the cylinder, and the bottom of the piston rod is fixedly connected with a piston ring; the linkage push-pull ring is sleeved on the outside of the suction syringe cylinder; the positioning swivel is rotatably connected to the middle of the suction syringe cylinder, and The positioning swivel is set on the top of the linkage push-pull ring; the positioning shell group is composed of a top positioning shell and a bottom positioning shell; the top positioning shell is rotatably connected to the outside of the rod body of the piston rod, and the bottom positioning shell is rotatably connected to the suction needle The top of the cylinder body; the one-way limit block is plugged into the inside of the positioning shell group; the bottom end of the quantitative control rod is rotatably connected to the ring body of the linkage push-pull ring.

Further, both sides of the piston rod body are provided with one-way racks, and the outer side of the block of the one-way limiting block is provided with one-way locking teeth, and the cross-sectional shape of the teeth of the one-way rack and the one-way locking teeth They are all triangular, the plane of the teeth of the one-way rack is designed to face upwards, and the plane of the teeth of the one-way bayonet is designed to face downwards.

Further, the one-way rack and the one-way bayonet are both arc-shaped in plan view, and two sets of one-way limit blocks are arranged symmetrically inside the top positioning shell and the bottom positioning shell, and the one-way limit block The back of the block is provided with a positioning top spring, and the two ends of the positioning top spring are respectively fixedly connected to the inside of the positioning shell group and the inside of the back side of the block body of the one-way limiting block.

Further, the two sides of the top positioning shell and the positioning swivel are respectively provided with a spring sleeve and a spring tube, and the spring tube is inserted into the inside of the spring sleeve, and the inside of the spring tube is provided with a reset top spring, and the reset top The two ends of the spring are respectively fixedly connected to the bottom in the spring barrel and the top in the spring sleeve.

Further, the outside of the rod body at the top of the quantitative control rod is provided with threads, and one side of the top positioning shell is provided with a threaded control block, the inside of the threaded control block is provided with threaded holes, and the rod body at the top of the quantitative control rod is screwed to In the threaded hole of the threaded control block.

Further, the inner side of the ring body of the linkage push-pull ring is provided with a linkage track block, and the outside of the cylinder body of the suction syringe is provided with a limit track groove. The groove path of the limit track groove is designed in an "L" shape, and the linkage track The block is plugged into the inside of the limiting track groove.

Further, the top of the suction syringe and the inside of the positioning swivel are provided with a limit swivel, and the middle part of the cylinder body of the suction syringe and the bottom of the bottom positioning shell are all provided with a limit rotation groove, and the suction syringe The limit swivel of the positioning swivel is rotatably connected to the limit turn slot of the bottom positioning shell, and the limit swivel of the positioning swivel is rotatably connected to the limit turn slot in the middle of the suction syringe barrel.

Compared with the prior art, the present invention has the following beneficial effects:

When the device is in use, the use height of the top positioning shell can be controlled and fixed through the quantitative control rod, so that each time the linkage push-pull ring is pulled, the compression stroke of the top positioning shell driven by the linkage push-pull ring can be guaranteed to be the same each time, and the linkage is released. When pushing and pulling the ring, the linked push-pull ring and the top positioning shell can be automatically reset under the action of the reset top spring, so as to realize multiple equal amounts of reagents added to the vaccine sample, which is convenient to operate and does not need to be added every time the reagent is added. Controlling the compression stroke of the piston rod is convenient and fast, and has a high degree of automation, which improves the flexibility and practicability of the device.

First, when the reaction reagent is drawn into the suction syringe, the linkage push-pull ring is rotated so that the linkage track block is located in the transverse groove of the limit track groove, and the linkage push-pull ring can drive the positioning shell group to rotate synchronously through the quantitative control rod, thereby Release the one-way limit block to the upward limit of the piston rod, and then pull the piston rod to draw the reaction reagent to the inside of the suction syringe, which is flexible and convenient, and improves the flexibility of the device.

Secondly, when it is necessary to add the same amount of reaction reagents to multiple groups of vaccine samples, turn the quantitative control rod to adjust the height of the top positioning shell according to the amount of reaction reagents added, so as to realize the adjustment of each compression stroke of the piston rod. After the adjustment is completed, , reset the linkage push-pull ring so that the linkage track block is located in the vertical groove of the limit track groove. At this time, pulling the linkage push-pull ring can drive the top positioning shell to move down through the quantitative control rod. When the top positioning shell moves down, it can be positioned by the top The one-way latch inside the shell drives the piston rod to move down to the same height synchronously through the one-way rack, so that the piston rod compresses the inside of the suction syringe to squeeze out the reaction reagent and add it to the vaccine sample. After a single addition is completed, the push-pull ring is linked And the top positioning shell will automatically reset under the action of the reset top spring, so that it is convenient to quantitatively add the same amount of reaction reagent to the next time the linkage push-pull ring is pulled, which is convenient and flexible. The one-way limit block inside the bottom positioning shell restricts the upward movement, so that the suction syringe sucks in air during the reset process of the linkage push-pull ring and the top positioning shell, which affects the subsequent use of the device. It is stable in use, convenient and flexible, and does not need each time It is necessary to control the compression stroke of the piston rod when adding the reaction reagent, which is convenient and quick, and has a high degree of automation, which improves the flexibility and practicability of the device.

Furthermore, when the positioning swivel rotates, the height of the positioning swivel will not be changed under the cooperation of the internal limit swivel of the positioning swivel and the limit turn slot in the middle of the suction syringe barrel, and the bottom positioning shell will not change the height of the positioning swivel when it rotates. The working height of the bottom positioning shell will not be changed under the cooperation of the limit turning groove at the bottom of the bottom positioning shell and the limit swivel ring on the top of the suction syringe, so as to ensure that the device is stable in use and can stably transfer multiple groups of vaccine samples Quantitative addition of reaction reagents is convenient and flexible, which improves the stability and durability of the device.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the present invention.

Fig. 3 is a schematic diagram of the internal structure of the interlocking track block of the present invention when it is located in the horizontal slot of the limit track slot.

Fig. 4 is a schematic diagram of the internal structure of the present invention when equal amounts of reaction reagents are added.

Fig. 5 is a schematic structural view of the disassembled suction syringe, piston rod and positioning swivel of the present invention.

Fig. 6 is a schematic structural view of the one-way limit block of the present invention.

Fig. 7 is a schematic diagram of the disassembled linkage push-pull ring and quantitative control rod of the present invention.

Fig. 8 is a schematic structural view of the bottom positioning shell of the present invention.

Fig. 9 is an enlarged structural schematic diagram of the part A in Fig. 2 of the present invention.

In the figure, the corresponding relationship between component names and drawing numbers is:

1. Suction syringe; 2. Piston rod; 3. Linkage push-pull ring; 4. Positioning swivel; 5. Positioning shell group; 6. One-way limit block; 7. Quantitative control rod; ; 102, limit swivel; 103, limit turn slot; 201, one-way rack; 301, linkage track block; 401, reset top spring; 501, top positioning shell; 502, bottom positioning shell; 601, one-way Detent teeth; 602, positioning top spring; 5011, threaded control block.

Detailed ways

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" , "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral Ground connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example:

As shown in accompanying drawing 1 to accompanying drawing 9:

The invention provides a volume-controlled adding device for human influenza vaccine detection, comprising a piston rod 2, a linkage push-pull ring 3, a positioning swivel 4, a positioning shell group 5, a one-way limiting block 6 and a quantitative control rod 7; The rod 2 is inserted into the inside of the suction syringe 1, and the bottom of the piston rod 2 is fixedly connected with a piston ring; the top of the suction syringe 1 and the inside of the positioning swivel 4 are equipped with a limit swivel 102, and the suction The middle part of the cylinder body of the syringe 1 and the bottom of the bottom positioning shell 502 are all provided with a limit turning groove 103, and the limit turning ring 102 of the suction syringe 1 is rotatably connected to the inside of the limit turning groove 103 of the bottom positioning shell 502, and positioned The limit swivel 102 of the swivel 4 is rotatably connected to the limit swivel 103 in the middle of the suction syringe 1, and the positioning swivel 4 is inside the positioning swivel 4 to limit the swivel 102 and the suction needle when rotating. The height of the positioning swivel 4 will not be changed under the cooperation of the limit turning groove 103 in the middle of the barrel 1, and the bottom positioning shell 502 will stop the limit turning groove 103 at the bottom of the bottom positioning shell 502 and the top of the suction syringe 1 when rotating. The use height of the bottom positioning shell 502 will not be changed under the cooperation of the limiting swivel 102, thereby ensuring that the device is stable in use, and can stably add reaction reagents to multiple groups of vaccine samples, which is convenient and flexible, and improves the safety of the device. Stability and durability; both sides of the piston rod 2 are provided with a one-way rack 201, and the outside of the block of the one-way limit block 6 is provided with a one-way card tooth 601, one-way rack 201 and one-way card The cross-sectional shape of the teeth of the teeth 601 is triangular. The plane of the teeth of the one-way rack 201 is designed to face upward, and the plane of the teeth of the one-way latch 601 is designed to face downward. When clamped with the one-way rack 201, the one-way limit block 6 can limit the upward movement of the piston rod 2, so that the piston rod 2 cannot move upward; the linkage push-pull ring 3 is sleeved on the outside of the suction syringe 1 cylinder; The inner side of the ring body of the linkage push-pull ring 3 is provided with a linkage track block 301, and the outside of the cylinder body of the suction syringe 1 is provided with a limit track groove 101. The groove path of the limit track groove 101 is designed in an "L" shape, and the linkage track The block 301 is plugged into the limit track groove 101. This design enables the linkage track block 301 of the linkage push-pull ring 3 to be limited by the limit track groove 101, so that the linkage push-pull ring 3 does not appear when it moves and rotates. Skewing and twisting cause the device to be stuck, which makes the device stable in use and improves the stability of the device; the positioning swivel 4 is rotatably connected to the middle of the cylinder of the suction syringe 1, and the positioning swivel 4 is set in the linkage The top of the push-pull ring 3; the positioning shell group 5 is composed of a top positioning shell 501 and a bottom positioning shell 502; the top positioning shell 501 is rotatably connected to the outside of the rod body of the piston rod 2, and the bottom positioning shell 502 is rotatably connected to the suction syringe 1 The top of the body; the one-way limit block 6 is plugged into the inside of the positioning shell group 5;

Wherein, the one-way rack 201 and the one-way latch 601 are both arc-shaped in plan view, and the one-way limit block 6 is provided with two symmetrical groups inside the top positioning shell 501 and the bottom positioning shell 502. The back of the limiting block 6 is provided with a positioning top spring 602, and the two ends of the positioning top spring 602 are respectively fixedly connected to the inside of the positioning shell group 5 and the inside of the back side of the one-way limiting block 6 blocks. When the linkage push-pull ring 3 makes the linkage track block 301 in the transverse groove position of the limit track groove 101, the linkage push-pull ring 3 can drive the positioning shell group 5 to rotate synchronously through the quantitative control rod 7, thereby releasing the one-way limit block 6 to the piston rod. 2 upward limit, at this time, pulling the piston rod 2 can draw the reaction reagent to the inside of the suction syringe 1, which is flexible and convenient, and improves the flexibility of the device.

Wherein, the two sides of the top positioning shell 501 and the positioning swivel 4 are respectively provided with a spring sleeve and a spring tube, and the spring tube is plugged into the inside of the spring sleeve, and the inside of the spring tube is provided with a reset top spring 401, and the reset top The two ends of the spring 401 are fixedly connected to the bottom of the spring barrel and the top of the spring sleeve respectively, so that the linkage push-pull ring 3 and the top positioning shell 501 will automatically reset under the action of the reset top spring 401 after the device is added once. , so that it is convenient to quantitatively add the same amount of reaction reagent to the push-pull ring 3 in the next pulling linkage, which is convenient and flexible.

Wherein, the outside of the rod body at the top of the quantitative control rod 7 is provided with threads, and one side of the top positioning shell 501 is provided with a threaded control block 5011, and the inside of the threaded control block 5011 is provided with a threaded hole, and the rod body at the top of the quantitative control rod 7 passes through the screw thread. Screwed into the threaded hole of the threaded control block 5011, so that the device can turn the quantitative control rod 7 to adjust the height of the top positioning shell 501 according to the added amount of the reaction reagent, so as to realize the adjustment of each compression stroke of the piston rod 2, and the adjustment is completed Finally, the linkage push-pull ring 3 is reset so that the linkage track block 301 is located at the vertical groove position of the limit track groove 101. At this time, pulling the linkage push-pull ring 3 can drive the top positioning shell 501 to move down through the quantitative control rod 7, and when the top positioning shell When 501 moves down, the one-way latch 601 inside the top positioning shell 501 can drive the piston rod 2 to move down to the same height synchronously through the one-way rack 201, so that the piston rod 2 compresses the inside of the suction syringe 1 to squeeze out the reaction reagent Added to the vaccine sample, after the single addition is completed, the linkage push-pull ring 3 and the top positioning shell 501 will automatically reset under the action of the reset top spring 401, so that it is convenient to quantitatively add the same amount of reaction reagent to the next time the linkage push-pull ring 3 is pulled, which is convenient Flexible, and during the reset process of the linkage push-pull ring 3 and the top positioning shell 501, the piston rod 2 can be limited by the one-way limit block 6 inside the bottom positioning shell 502, so that the suction syringe 1 Air is inhaled during the reset process of the positioning shell 501, which affects the subsequent use of the device. It is stable in use, convenient and flexible, and does not need to control the compression stroke of the piston rod 2 every time the reaction reagent is added, which is convenient and quick, and has a high degree of automation. The flexibility and practicality of the device.

The specific usage and function of this embodiment:

In the present invention, when multiple groups of vaccine samples are tested and tested, the reaction reagent is first extracted into the inside of the suction syringe 1 for use, and the linkage push-pull ring 3 is rotated so that the linkage track block 301 is positioned in the transverse direction of the limit track groove 101. At the groove position, the positioning swivel 4 will not change the height of the positioning swivel 4 under the cooperation of the internal limit swivel 102 of the positioning swivel 4 and the limit swivel 103 in the middle of the suction syringe 1 cylinder when it rotates, and When the bottom positioning shell 502 rotates, the working height of the bottom positioning shell 502 will not be changed under the cooperative action of the limit turning groove 103 at the bottom of the bottom positioning shell 502 and the limit swivel 102 on the top of the suction syringe 1, thereby ensuring that the device It is stable in use and can stably add reaction reagents to multiple groups of vaccine samples in equal amounts, which is convenient and flexible. The linkage push-pull ring 3 can drive the positioning shell group 5 to rotate synchronously through the quantitative control rod 7, thereby releasing the one-way limit block 6 to the piston rod 2 The upper limit, at this time, pull the piston rod 2 to extract the reaction reagent into the suction syringe 1, which is flexible and convenient. When adding the reaction reagent to multiple groups of vaccine samples, turn the quantitative control lever 7 according to the amount of the reaction reagent added. Adjust the height of the top positioning shell 501, thereby realizing the adjustment of each compression stroke of the piston rod 2. After the adjustment is completed, reset the linkage push-pull ring 3 so that the linkage track block 301 is located in the vertical groove of the limit track groove 101. At this time The pull linkage push-pull ring 3 can drive the top positioning shell 501 to move down through the quantitative control rod 7. When the top positioning shell 501 moves down, the one-way latch 601 inside the top positioning shell 501 can drive the piston rod 2 through the one-way rack 201. Synchronously move down to the same height, so that the piston rod 2 compresses the inside of the suction syringe 1 to extrude the reaction reagent and add it to the vaccine sample. It automatically resets under the action, so that it is convenient to quantitatively add the same amount of reaction reagent to the next time the linkage push-pull ring 3 is pulled, which is convenient and flexible, and the piston rod 2 can be moved by the bottom positioning shell 502 during the reset process of the linkage push-pull ring 3 and the top positioning shell 501. The one-way limit block 6 restricts the upward movement, so that the suction syringe 1 sucks in air during the reset process of the linkage push-pull ring 3 and the top positioning shell 501, which affects the subsequent use of the device. It is stable in use, convenient and flexible, and does not need to be added every time When injecting the reaction reagent, it is necessary to control the compression stroke of the piston rod 2, which is convenient and quick, and has a high degree of automation. When the device is in use, the use height of the top positioning shell 501 can be controlled and fixed by the quantitative control rod 7, so that each pulling is linked When the push-pull ring 3 can ensure that the top positioning shell 501 drives the linkage push-pull ring 3 each time the compression stroke is the same, and when the linkage push-pull ring 3 is released, the linkage push-pull ring 3 and the top positioning shell 501 can automatically reset under the action of the reset top spring 401. Resetting, so as to realize multiple equal amounts of adding reaction reagents to the vaccine sample, which is convenient to operate and does not need to control the compression stroke of the piston rod 2 every time the reaction reagent is added, which is convenient, quick and highly automated.

The embodiments of the present invention have been presented for purposes of illustration and description, but are not intended to be exhaustive or to limit the invention to the form disclosed. Many modifications and changes will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to better explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention and design various embodiments with various modifications as are suited to the particular use.

Claims (1)

1. A accuse volume interpolation device for human influenza vaccine detects, its characterized in that: comprises a piston rod (2), a linkage push-pull ring (3), a positioning swivel (4), a positioning shell group (5), a one-way limiting block (6) and a quantitative control rod (7); the piston rod (2) is inserted into the suction needle cylinder (1), and the bottom of the piston rod (2) is fixedly connected with a piston ring; the linkage push-pull ring (3) is sleeved outside the cylinder body of the suction needle cylinder (1); the positioning swivel (4) is rotationally connected to the middle part of the cylinder body of the suction needle cylinder (1), and the positioning swivel (4) is arranged at the top of the linkage push-pull ring (3); the positioning shell group (5) consists of a top positioning shell (501) and a bottom positioning shell (502); the top positioning shell (501) is rotationally connected to the outside of the rod body of the piston rod (2), and the bottom positioning shell (502) is rotationally connected to the top of the cylinder body of the suction needle cylinder (1); the one-way limiting block (6) is inserted into the positioning shell group (5); the bottom end of the quantitative control rod (7) body is rotationally connected inside the ring body of the linkage push-pull ring (3);

the two sides of the rod body of the piston rod (2) are respectively provided with a unidirectional rack (201), the outer side of the block body of the unidirectional limiting block (6) is provided with a unidirectional latch (601), the cross section of the gear teeth of the unidirectional racks (201) and the unidirectional latch (601) are triangular, the plane of the gear teeth of the unidirectional racks (201) is designed upwards, and the plane of the gear teeth of the unidirectional latch (601) is designed downwards;

the unidirectional racks (201) and the unidirectional latches (601) are arc-shaped in overlook shape, two symmetrical groups of unidirectional limiting blocks (6) are arranged in the top positioning shell (501) and the bottom positioning shell (502), positioning top springs (602) are arranged on the back of the unidirectional limiting blocks (6), and two ends of each positioning top spring (602) are fixedly connected in the positioning shell group (5) and the back side of a block body of each unidirectional limiting block (6) respectively;

the two sides of the top positioning shell (501) and the positioning swivel (4) are respectively provided with a spring sleeve and a spring barrel, the spring barrels are inserted into the spring sleeves, a reset top spring (401) is arranged in the spring barrels, and two ends of the reset top spring (401) are respectively and fixedly connected with the bottom in the spring barrels and the top in the spring sleeves;

the outer part of the rod body at the top of the quantitative control rod (7) is provided with threads, one side of the top positioning shell (501) is provided with a thread control block (5011), the inside of the thread control block (5011) is provided with a threaded hole, and the rod body at the top of the quantitative control rod (7) is screwed in the threaded hole of the thread control block (5011) through threads;

a linkage track block (301) is arranged on the inner side of the ring body of the linkage push pull ring (3), a limit track groove (101) is formed in the outer part of the cylinder body of the suction needle cylinder (1), the groove body path of the limit track groove (101) is L-shaped, and the linkage track block (301) is spliced in the limit track groove (101);

the top of suction cylinder (1) and the inside of location swivel (4) all are equipped with spacing swivel (102), and the barrel middle part of suction cylinder (1) and the bottom of end positioning shell (502) all are equipped with spacing groove (103), and spacing swivel (102) of suction cylinder (1) rotate to be connected in the spacing groove (103) of end positioning shell (502) inside, and in spacing groove (103) at suction cylinder (1) barrel middle part are rotated to spacing swivel (102) of location swivel (4).

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