A body fluid sampling device for animal experiments

Abstract

The present invention discloses a body fluid sampling device for animal experiments, which belongs to the technical field of body fluid sampling and comprises a sampling tube, wherein a piston plate is slidably mounted inside the sampling tube, a plurality of movable grooves are provided on the outer wall of the sampling tube from bottom to top, a blocking component for blocking the piston plate is provided inside the movable groove, compressed absorbent cotton is placed between the vertical part of the block and the inner wall of the movable groove on one side close to the center of the sampling tube, a penetration hole is provided on the lower side of one end of the movable groove close to the center of the sampling tube, the present invention can block the piston plate by means of the set block, and can control the amount of body fluid extracted within a certain time when extracting body fluid, so as to avoid the situation that excessive extraction in a short time causes pressure change and causes discomfort to the animal, and the absorbent cotton can be automatically expanded after a certain time to remove the block, so that the piston plate can be moved again, thereby avoiding the discomfort of the animal and the resistance behavior that threatens the surrounding staff.

Description

Technical Field

[0001] The present invention relates to the technical field of body fluid sampling, and more specifically, to a body fluid sampling device for animal experiments. Background Art

[0002] In experiments involving extracting animal body fluids, when diagnosing diseases in sick animals or detecting the progression of animal diseases, it is necessary to use a body fluid sampling device to sample the animal's body fluids. Usually, a syringe with a needle tip is used for extraction. The extracted body fluids can be used to detect whether the animal is infected with the disease so that it can be isolated and treated in a timely manner to prevent the spread of the disease.

[0003] After inserting the extraction device into the animal's body, when the staff extracts the animal's body fluids, it is difficult for the staff to control the amount to be extracted each time in a short period of time. When too much is extracted at one time, negative pressure will be formed due to a large change in the body fluids at the same position in the animal's body in a short period of time. At this time, the animal will feel uncomfortable and easily resist, thus threatening the safety of the staff. Therefore, a body fluid sampling device for animal experiments is provided to ensure that the staff can extract an appropriate amount of body fluid each time when extracting the animal's body fluids, and wait until the body fluids at other positions are replenished to the extraction site before extraction, thereby ensuring the comfort of the animal when extracting body fluids. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a body fluid sampling device for animal experiments.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A body fluid sampling device for animal experiments, comprising a sampling tube, a piston plate slidably mounted inside the sampling tube, a push rod fixedly mounted on the upper end of the piston plate, a plurality of movable grooves are opened from bottom to top on the outer wall of the sampling tube, and a blocking component for blocking the piston plate is installed inside the movable groove;

[0007] The blocking assembly includes a block slidably installed inside the movable groove, the upper side of the block is a horizontal structure, and the right side of the block is a vertical structure, the horizontal part of the block close to the center of the sampling tube passes through the movable groove and extends into the interior of the sampling tube, compressed absorbent cotton is placed between the vertical part of the block and the inner wall of the movable groove close to the center of the sampling tube, and a penetration hole is opened on the lower side of the end of the movable groove close to the center of the sampling tube.

[0008] Furthermore, a tension spring is provided on the outer sleeve of the push rod, the upper end of the tension spring is fixedly connected to the upper end of the sampling tube, and the lower end of the tension spring is fixedly connected to the upper end of the piston plate, and the tension spring pulls the piston plate.

[0009] Furthermore, piston covers are fixedly installed at positions corresponding to the movable groove on the outer wall of the sampling tube, the interior of the piston cover is connected to the interior of the movable groove, and multiple piston covers on the same vertical line are connected through a connecting pipe.

[0010] Furthermore, a water outlet is provided inside the lower side wall of the sampling tube, and the lower end of the connecting tube is connected to the inside of the water outlet.

[0011] Furthermore, a water inlet is provided at the lower end of the sampling tube, a sampling needle is slidably installed inside the water inlet, the interior of the sampling needle is connected with the interior of the water inlet, and a compression spring is fixedly installed on the upper end of the sampling needle, and the compression spring squeezes the upper end of the sampling needle.

[0012] Furthermore, a fixing ring is fixedly mounted on the lower end of the piston plate, and a limiting groove is provided at a position corresponding to the fixing ring at the lower end of the inner wall of the sampling tube, and the size of the fixing ring is adapted to the size of the limiting groove.

[0013] Furthermore, a movable groove is provided on the inner wall of the limiting groove on one side close to the water inlet, a clamping block is slidably installed inside the movable groove, a clamping groove adapted to the clamping block is provided at a position corresponding to the fixing ring and the clamping block, the clamping block is engaged with the clamping groove, a connecting spring is fixedly installed on one end of the clamping block close to the movable groove, and the end of the connecting spring away from the clamping block is fixedly connected to the inner wall of the movable groove.

[0014] Furthermore, a push rod is fixedly installed at one end of the block near the connecting spring, and the push rod passes through the movable groove and extends to the inside of the water inlet. A retaining ring is slidably installed inside the water inlet relative to the upper end of the sampling needle, and the retaining ring blocks the push rod. The upper side size of the sampling needle is smaller than the size of the retaining ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention can block the piston plate by setting a stopper, and can control the amount of body fluid extracted within a certain period of time when extracting body fluid, so as to avoid excessive extraction in a short period of time causing pressure changes that make the animal feel uncomfortable, and can automatically expand the absorbent cotton after a certain period of time to remove the stopper, so that the piston plate can move again, thereby avoiding the animal's discomfort and resistance behavior that threatens the surrounding staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the sampling tube of the present invention;

[0019] Figure 3 It is a partial structural schematic diagram of the piston plate of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the fixing ring and the limiting groove of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the sampling needle and the retaining ring of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the ejector rod and the block part of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the piston cover and the stopper part of the present invention.

[0024] Description of the numbers in the figure:

[0025] 1. Sampling tube; 101. Piston plate; 102. Push rod; 103. Movable groove; 104. Infiltration hole; 105. Tension spring; 106. Piston cover; 107. Water outlet; 108. Water inlet; 109. Sampling needle; 110. Compression spring; 111. Fixed ring; 112. Limiting groove; 113. Moving groove; 114. Block; 115. Slot; 116. Connecting spring; 117. Push rod; 118. Retaining ring; 119. Connecting pipe;

[0026] 2. Blocking assembly; 201. Blocking block; 202. Water-absorbing cotton. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0028] See also Figures 1 to 7 A body fluid sampling device for animal experiments, comprising a sampling tube 1, a piston plate 101 is slidably installed inside the sampling tube 1, the outer wall of the piston plate 101 is in contact with the inner wall of the sampling tube 1, the piston plate 101 can be made of rubber material to maintain sealing, a push rod 102 is fixedly installed on the upper end of the piston plate 101, a plurality of movable grooves 103 are opened from bottom to top on the outer wall of the sampling tube 1, a blocking component 2 for blocking the piston plate 101 is installed inside the movable groove 103, and the blocking component 2 can limit the moving range of the piston plate 101 so that it can only move a fixed distance each time;

[0029] The blocking component 2 includes a block 201 slidably mounted inside the movable groove 103. The upper side of the block 201 is a horizontal structure, and the right side of the block 201 is a vertical structure. The block 201 can block the piston plate 101, so that it stops rising after rising for a certain distance. The end of the horizontal part of the block 201 close to the center of the sampling tube 1 penetrates the movable groove 103 and extends into the inside of the sampling tube 1. Compressed absorbent cotton 202 is placed between the vertical part of the block 201 and the inner wall of one side of the movable groove 103 close to the center of the sampling tube 1. A penetration hole 104 is provided on the lower side of the end of the movable groove 103 close to the center of the sampling tube 1. The body fluid drawn into the sampling rod 1 can slowly penetrate into the movable groove through the penetration hole 104 and be absorbed by the absorbent cotton 202. The absorbent cotton 202 can also be made of a canvas bag filled with polymer material. After absorbing the liquid, the absorbent cotton 202 expands and squeezes the block 201 to make it move.

[0030] The outer sleeve of the push rod 102 is provided with a tension spring 105, the upper end of the tension spring 105 is fixedly connected to the upper end of the sampling tube 1, and the lower end of the tension spring 105 is fixedly connected to the upper end of the piston plate 101. The tension spring 105 pulls the piston plate 101, and the tension spring 105 can generate an upward pulling force on the piston plate 101. The tension spring 105 can also be replaced by other elastic components, such as an elastic rope;

[0031] The piston cover 106 is fixedly installed at the position corresponding to the outer wall of the sampling tube 1 and the movable groove 103. The piston cover 106 is filled with a disinfectant solution, which can disinfect the puncture site. The interior of the piston cover 106 is connected with the interior of the movable groove 103. Multiple piston covers 106 on the same vertical line are connected through a connecting pipe 119. Multiple one-way valves are installed inside the connecting pipe 119. When the stopper 201 squeezes the disinfectant solution in the piston cover 106, the pressure in the piston cover 106 increases, which can open the one-way valve, so that the disinfectant solution flows out from the connecting pipe 119. The one-way valve can separate two adjacent piston covers 106. The one-way valve can be opened when under pressure. The piston cover 106 is openable, and disinfectant solution can be added to the piston cover 106 after opening.

[0032] A water outlet 107 is provided inside the lower side wall of the sampling tube 1. The water outlet 107 is arranged in an inclined shape. The water outlet 107 can guide the disinfection solution to the needle insertion site. The lower end of the connecting tube 119 is connected to the inside of the water outlet 107.

[0033] A water inlet 108 is provided at the lower end of the sampling tube 1, a sampling needle 109 is slidably installed inside the water inlet 108, the interior of the sampling needle 109 is connected with the interior of the water inlet 108, and the water inlet 108 is connected with the interior of the sampling tube 1, the body fluid of the animal can enter the interior of the sampling tube 1 through the sampling needle 109 and the water inlet 108, and a compression spring 110 is fixedly installed on the upper end of the sampling needle 109, and the compression spring 110 squeezes the upper end of the sampling needle 109;

[0034] A fixing ring 111 is fixedly installed at the lower end of the piston plate 101, and a limiting groove 112 is provided at the lower end of the inner wall of the sampling tube 1 at a position corresponding to the fixing ring 111. After the fixing ring 111 is lowered, it can be inserted into the limiting groove 112. The size of the fixing ring 111 is adapted to the size of the limiting groove 112.

[0035] A movable groove 113 is provided on the inner wall of the limiting groove 112 near the water inlet 108, and a block 114 is slidably installed inside the movable groove 113. The size of the movable groove 113 is larger than the size of the block 114. After the block 114 moves, it can be completely retracted into the movable groove 113. A slot 115 adapted to the block 114 is provided at the position corresponding to the fixing ring 111 and the block 114. The block 114 can be inserted into the slot 115 to fix the fixing ring 111 inside the limiting groove 112. The block 114 and the slot 115 are engaged and matched. A connecting spring 116 is fixedly installed on one end of the block 114 near the movable groove 113, and the end of the connecting spring 116 away from the block 114 is fixedly connected to the inner wall of the movable groove 113, and the connecting spring 116 can generate a pulling force on the block 114.

[0036] A push rod 117 is fixedly installed on one end of the block 114 close to the connecting spring 116. The push rod 117 passes through the movable groove 113 and extends to the inside of the water inlet 108. A retaining ring 118 is slidably installed inside the water inlet 108 relative to the upper end of the sampling needle 109. The retaining ring 118 blocks the push rod 117, and the upper side size of the sampling needle 109 is smaller than the size of the retaining ring 118.

[0037] By adopting the above technical solution, after the device is aligned with the position to be sampled, the sampling needle 109 is inserted into the surface of the animal's body. At this time, under the obstruction of the animal's body, the sampling needle 109 will first move relative to the sampling tube 1. After the sampling needle 109 rises, it can push the retaining ring 118 on its upper side to rise. When the retaining ring 118 rises to a point where its lower end is higher than the upper end of the ejector rod 117, the block 114 can drive the ejector rod 117 to move a certain distance under the action of the connecting spring 116, and then be blocked by the upper side of the sampling needle 109. At this time, the ejector rod 117 will still be blocked, so that the block 114 cannot be completely separated from the card slot 115 under the action of the connecting spring 116. When the lower end of the sampling needle 109 moves to the liquid collection position, the ejector rod 117 is When the needle tip of the sampling needle 109 is no longer blocked, the sampling needle 109 can be lowered relative to the water inlet 108 under the action of the compression spring 110. When the sampling needle 109 is lowered, the retaining ring 118 will also be lowered, but the lower end of the retaining ring 118 will be blocked by the ejector rod 117. At this time, the retaining ring 118 will no longer be able to block the ejector rod 117. When the sampling needle 109 continues to descend, the ejector rod 117 can be located between the retaining ring 118 and the upper end of the sampling needle 109 under the action of the connecting spring 116 and the block 114. When the ejector rod 117 is no longer blocked, the block 114 can be disengaged from the slot 115 under the action of the connecting spring 116. When the block 114 is disengaged from the slot 115, the fixing ring 111 is not Then it is fixed in the limit groove 112. At this time, the piston plate 101 can rise under the action of the tension spring 105. After the piston plate 101 rises, negative pressure can be generated between the lower end of the piston plate 101 and the sampling tube 1. At this time, the liquid can enter the water inlet 108 through the sampling needle 109, so as to avoid the movement of the piston plate 101 when the sampling needle 109 does not reach the specified position, causing body fluids at other positions to be sucked into the sampling needle and enter the sampling tube 1 through the water inlet 108. Among them, the piston plate 101 will be blocked by the block 201 after rising a certain distance. After being blocked, the piston plate 101 will no longer rise until the piston plate 101 and the lower side of the inner wall of the sampling tube 1 are filled with liquid. When the liquid enters the sampling tube 1 can slowly penetrate into the movable groove 103 through the penetration hole 104, so as to be absorbed by the compressed absorbent cotton 202. The absorbent cotton 202 can expand after absorbing water, so as to squeeze the stopper 201 after expansion, so that the stopper 201 moves. After the stopper 201 moves, it can move away from the upper side of the piston plate 101. At this time, the piston plate 101 can rise again for a distance under the action of the tension spring 105. In the process of the stopper 201 moving away from the upper end of the piston plate 101, the disinfectant solution in the piston cover 106 can be squeezed. At this time, the disinfectant solution in the piston cover 106 can flow to the water outlet 107 through the connecting pipe 119, so as to disinfect the area around the needle pricking position.

[0038] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A body fluid sampling device for animal experiments, comprising a sampling tube (1), characterized in that: A piston plate (101) is slidably mounted inside the sampling tube (1), a push rod (102) is fixedly mounted on the upper end of the piston plate (101), a plurality of movable grooves (103) are formed on the outer wall of the sampling tube (1) from bottom to top, and a blocking component (2) is mounted inside the movable groove (103) for blocking the piston plate (101); The blocking assembly (2) comprises a block (201) slidably mounted inside the movable groove (103); the upper side of the block (201) is a horizontal structure, and the right side of the block (201) is a vertical structure; an end of the horizontal portion of the block (201) close to the center of the sampling tube (1) penetrates the movable groove (103) and extends into the interior of the sampling tube (1); compressed absorbent cotton (202) is placed between the vertical portion of the block (201) and the inner wall of one side of the movable groove (103) close to the center of the sampling tube (1); and a penetration hole (104) is provided on the lower side of one end of the movable groove (103) close to the center of the sampling tube (1); The push rod (102) is externally sleeved with a tension spring (105), the upper end of the tension spring (105) is fixedly connected to the upper end of the sampling tube (1), and the lower end of the tension spring (105) is fixedly connected to the upper end of the piston plate (101), and the tension spring (105) pulls the piston plate (101); A piston cover (106) is fixedly mounted at positions corresponding to the outer wall of the sampling tube (1) and the movable groove (103); the interior of the piston cover (106) is connected to the interior of the movable groove (103); and a plurality of piston covers (106) on the same vertical line are connected via a connecting pipe (119); A water outlet (107) is provided inside the lower side wall of the sampling tube (1), and the lower end of the connecting tube (119) is connected to the inside of the water outlet (107); A water inlet (108) is provided at the lower end of the sampling tube (1), a sampling needle (109) is slidably mounted inside the water inlet (108), the interior of the sampling needle (109) is communicated with the interior of the water inlet (108), a compression spring (110) is fixedly mounted on the upper end of the sampling needle (109), and the compression spring (110) compresses the upper end of the sampling needle (109).

2. A body fluid sampling device for animal experiments according to claim 1, characterized in that: A fixing ring (111) is fixedly mounted on the lower end of the piston plate (101), and a limiting groove (112) is provided at a position corresponding to the fixing ring (111) at the lower end of the inner wall of the sampling tube (1), and the size of the fixing ring (111) matches the size of the limiting groove (112).

3. A body fluid sampling device for animal experiments according to claim 2, characterized in that: A movable groove (113) is provided on the inner wall of one side of the limiting groove (112) close to the water inlet (108); a clamping block (114) is slidably installed inside the movable groove (113); a clamping groove (115) adapted to the clamping block (114) is provided at a position corresponding to the clamping block (114) of the fixing ring (111); the clamping block (114) and the clamping groove (115) are clamped and matched; a connecting spring (116) is fixedly installed on one end of the clamping block (114) close to the movable groove (113); and one end of the connecting spring (116) away from the clamping block (114) is fixedly connected to the inner wall of the movable groove (113).

4. The body fluid sampling device for animal experiments according to claim 3, characterized in that: A push rod (117) is fixedly mounted on one end of the clamping block (114) close to the connecting spring (116); the push rod (117) passes through the movable groove (113) and extends to the inside of the water inlet (108); a retaining ring (118) is slidably mounted inside the water inlet (108) at a position relative to the upper end of the sampling needle (109); the retaining ring (118) blocks the push rod (117); and the size of the upper side of the sampling needle (109) is smaller than the size of the retaining ring (118).

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