Quantitative reagent extraction device

Abstract

The quantitative reagent extraction device comprises an injector used for extracting a reagent, the injector comprises a needle cylinder part and a needle tail part, the quantitative reagent extraction device further comprises a mounting base, a fixing assembly and a push-pull assembly, the mounting base is used for placing the needle cylinder part, the fixing assembly is arranged on the mounting base, the fixing assembly comprises a pressing part capable of moving in the vertical direction, and the push-pull assembly is arranged on the pressing part. The needle cylinder parts with different sizes are tightly pressed and fixed on the mounting seat; the push-and-pull assembly is arranged on the mounting base and electrically connected with a distance detection mechanism, and the push-and-pull assembly is connected with the needle tail part and used for enabling the needle tail part to move in the needle cylinder part at equal intervals under the driving of the distance detection mechanism so as to quantitatively extract the reagent. The utility model aims to realize quantitative extraction of reagents by using injectors with different sizes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reagent extraction, in particular to a reagent quantitative extraction device. BACKGROUND

[0002] In the medical detection process, various reagents need to be quantitatively extracted, so that a syringe needs to be used for operation, the suction end of the syringe needs to be inserted into the inside of a reagent containing box, and then the piston rod is pulled to realize suction operation, so that the reagent can be extracted, and the extracted reagent is measured according to a measuring cylinder to determine the extraction amount. When multiple quantitative extractions are required, repeated measurement and control are required, and it is difficult to ensure that the amount of reagent extracted each time can reach the predetermined amount, so that the quantitative extraction of the reagent is difficult. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a reagent quantitative extraction device, which can realize quantitative extraction of reagents by different sizes of syringes.

[0004] In a first aspect, the present application provides a reagent quantitative extraction device, which comprises a syringe for extracting reagents, the syringe comprising a needle cylinder part and a needle tail part, and further comprising a mounting seat, a fixing assembly and a push-pull assembly. The mounting seat is used for placing the needle cylinder part. The fixing assembly is arranged on the mounting seat and comprises a pressing part which can move along the vertical direction and is used to press and fix the needle cylinder part of different sizes on the mounting seat. The push-pull assembly is arranged on the mounting seat and is electrically connected with a distance detection mechanism. The push-pull assembly is connected with the needle tail part and is used to move the needle tail part equidistantly in the needle cylinder part under the driving of the distance detection mechanism, so as to quantitatively extract the reagent.

[0005] In some embodiments, the pressing part comprises a fixed column, a first screw rod and a pressing seat. The fixed column is fixedly installed on the mounting seat. One end of the first screw rod is rotationally connected with the fixed column, and the other end is fixedly connected with a knob. One end of the pressing seat is provided with a first through hole, and the inner wall of the first through hole is threadedly connected with the first screw rod. The surface of the pressing seat close to the mounting seat is arranged in an arc shape. The needle cylinder part has a first lug. The fixing assembly further comprises a clamping seat and a placing seat. The clamping seat is fixedly installed on the mounting seat and is provided with a first arc-shaped clamping groove for clamping the first lug. The placing seat is fixedly installed on the mounting seat and the surface of the placing seat away from the mounting seat is arranged in an arc shape.

[0006] In some embodiments, the mounting seat is provided with a rectangular sliding groove, the push-pull assembly includes a motor, a second screw rod and a moving seat, the motor is arranged in the interior of the mounting seat and is electrically connected with the distance detection mechanism; one end of the second screw rod is rotatably connected with the inner wall of the mounting seat, and the other end is fixedly connected with the output end of the motor; the moving seat is threadedly connected with the outer wall of the second screw rod, the outer wall of the moving seat is slidably connected with the inner wall of the rectangular sliding groove, and the top of the moving seat is fixedly connected with a moving block for clamping the needle tail; the distance detection mechanism includes a circuit board assembly, a displacement sensor, a switch button and two steering buttons, the circuit board assembly is arranged in the mounting seat and is electrically connected with the motor, so as to transmit a closing signal to the motor according to the distance signal of the needle tail movement to stop the movement of the needle tail; the displacement sensor is arranged on the moving block and is electrically connected with the circuit board assembly, so as to transmit the distance signal of the needle tail movement to the circuit board assembly; the switch button is arranged in the mounting seat and is electrically connected with the motor, so as to start the motor; the two steering buttons are arranged on the circuit board assembly and are electrically connected with the motor, so as to change the steering direction of the motor output end; the needle tail has a second lug, the moving block includes a first clamping plate, a second clamping plate and a fixed block, the second clamping plate is provided with a U-shaped notch, the fixed block is fixedly connected with the moving seat, the surface of the fixed block away from the moving seat is fixedly connected with the first clamping plate and the second clamping plate, and the part of the fixed block between the first clamping plate and the second clamping plate is provided with a second arc-shaped clamping groove for clamping the second lug; a sliding rod is arranged in the interior of the mounting seat, the bottom of the moving seat is slidably connected with the sliding rod, the end of the sliding rod is sleeved with a spiral spring, one end of the spiral spring abuts against the moving seat, and the other end is fixedly connected with the inner wall of the mounting seat.

[0007] The reagent quantitative extraction device based on the embodiments of the present application can fix syringes of different sizes on the mounting seat by moving the pressing part up and down, meet the needs of various experiments for extracting different doses of reagents, reduce the problem of being unable to use caused by the mismatch between the syringe specifications and the device, and enhance the versatility of the equipment; the push-pull assembly is driven to move by the distance detection mechanism, the needle tail is connected with the push-pull assembly, the needle tail can move at equal distances for multiple times, the same amount of reagent can be extracted each time, the experimental error caused by the deviation of the reagent amount is reduced, the reliability and repeatability of the experimental results are improved, false positives or false negatives of the detection results caused by too much or too little reagent are avoided, and reliable basis is provided for medical diagnosis and environmental assessment. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0009] Figure 1The three-dimensional structure schematic diagram of the reagent quantitative extraction device of the application;

[0010] Figure 2 For Figure 1 The three-dimensional cut structure schematic diagram of the reagent quantitative extraction device from another perspective;

[0011] Figure 3 The three-dimensional structure schematic diagram of the fixed assembly, the push-pull assembly and the syringe of the application;

[0012] Figure 4 For Figure 2 The three-dimensional cut structure schematic diagram of the reagent quantitative extraction device without placing the syringe;

[0013] Figure 5 For Figure 4 The three-dimensional cut structure schematic diagram of the reagent quantitative extraction device without placing the syringe from another perspective;

[0014] Explanation of reference signs:

[0015] 1, mounting seat; 11, rectangular sliding groove; 12, mounting rod; 13, sliding rod; 14, spiral spring; 2, fixed assembly; 21, pressing part; 211, knob; 212, first screw rod; 213, pressing seat; 22, placing seat; 23, clamping seat; 3, distance detection mechanism; 31, displacement sensor; 32, circuit board assembly; 33, steering button; 34, switch button; 4, push-pull assembly; 41, second screw rod; 42, moving seat; 43, moving block; 431, first clamping plate; 432, second clamping plate; 433, fixed block; 44, motor; 5, syringe; 51, needle cylinder part; 511, first ear seat; 52, needle tail part; 521, second ear seat.

[0016] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the application more clear, the application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0018] Please refer to Figures 1 to 5The application provides a reagent quantitative extraction device, which comprises a syringe 5 for extracting reagents, the syringe 5 comprises a needle cylinder part 51 and a needle tail part 52, and further comprises a mounting seat 1, a fixing assembly 2 and a push-pull assembly 4, the mounting seat 1 is used for placing the needle cylinder part 51, the fixing assembly 2 is arranged on the mounting seat 1, the fixing assembly 2 comprises a pressing part 21 which can move along the vertical direction and is used for tightly fixing the needle cylinder part 51 of different sizes on the mounting seat 1, and the push-pull assembly 4 is arranged on the mounting seat 1 and is electrically connected with a distance detection mechanism 3, the push-pull assembly 4 is connected with the needle tail part 52 and is used for moving the needle tail part 52 in the needle cylinder part 51 at equal distances under the driving of the distance detection mechanism 3, so that the reagents can be quantitatively extracted.

[0019] In the embodiments, the syringe 5 can be placed on the upper surface of the mounting seat 1 and located directly below the pressing part 21, the pressing part 21 is moved downward to contact the outer surface of the needle cylinder part 51 of the syringe 5 and tightly fix the needle cylinder part 51, and then the syringe 5 is fixed. The pressing part 21 can move up and down to tightly fix syringes 5 of different sizes. After the syringe 5 is fixed, the distance detection mechanism 3 operates and drives the push-pull assembly 4 to move, and the push-pull assembly 4 drives the needle tail part 52 to move in the needle cylinder part 51 after moving, the needle cylinder part 51 can comprise a needle cylinder, the needle tail part 52 can comprise a piston rod and a piston, and the piston rod drives the piston to move in the needle cylinder after moving, so that the reagents can be extracted. The distance detection mechanism 3 can detect the distance of the needle tail part 52, and the push-pull assembly 4 stops moving when the distance of the needle tail part 52 reaches a preset distance, so that the needle tail part 52 can move at equal distances for multiple times, and the same amount of reagents can be extracted each time. Then, the syringe 5 of different sizes can quantitatively extract reagents.

[0020] The fixing assembly 2 can fix syringes 5 of different sizes, and the fixing assembly 2 can be replaced with a syringe 5 with a suitable size of a needle cylinder when facing reagents of different concentrations, so that the device can meet the needs of various experiments for extracting reagents of different dosages, can reduce the problem that the device cannot be used due to the mismatch between the syringe 5 and the device, and can enhance the universality of the device. The distance detection mechanism 3 and the push-pull assembly 4 can accurately extract reagents according to the preset amount of experiments, can reduce experimental errors caused by the deviation of the amount of reagents, can improve the reliability and repeatability of experimental results, can ensure that the same experiments performed by different experimenters or at different times can obtain similar results, can avoid false positives or false negatives caused by too much or too little reagents, and can provide reliable basis for medical diagnosis and environmental assessment.

[0021] In order to realize the pressing and fixing of the syringe 5 with different sizes by the pressing part 21, the pressing part 21 can include a pressing plate and two first elastic members, one end of the two first elastic members is fixedly connected to the upper surface of the mounting seat 1, and the other end is fixedly connected to the pressing plate. The barrel part 51 can be placed between the pressing plate, the two first elastic members and the mounting seat 1, the pressing plate tightly abuts the outer surface of the barrel part 51, and the two elastic members can tightly press the barrel part 51 to fix the syringe 5. Of course, the pressing part 21 can also include a pressing plate, two connecting columns, two second elastic members and two fixed cylinders, the two fixed cylinders are fixedly installed on the upper surface of the mounting seat 1, one end of the two connecting columns is fixedly connected to the pressing plate, and the other end is movably arranged in the fixed cylinder, the other end of the two connecting columns is sleeved with the second elastic member, and the two ends of the second elastic member are fixedly connected to the connecting column and the inner wall of the fixed cylinder respectively. The arrangement of the two connecting columns and the two fixed cylinders can prevent the lateral shaking of the barrel part 51, and the elastic action of the second elastic member can make the pressing plate tightly press the barrel part 51.

[0022] In order to more firmly fix the barrel part 51 and improve the service life of the pressing part 21, in some embodiments of the present application, the pressing part 21 includes a fixed column, a first screw rod 212 and a pressing seat 213. The fixed column is fixedly installed on the mounting seat 1; one end of the first screw rod 212 is rotatably connected to the fixed column, and the other end is fixedly connected with the knob 211; the pressing seat 213 is provided with a first through hole, the inner wall of the first through hole is threadedly connected with the first screw rod 212, and the surface of the pressing seat 213 close to the mounting seat 1 is arc-shaped.

[0023] In this way, when the syringe 5 is placed on the upper surface of the mounting seat 1, the knob 211 is rotated to make the first screw rod 212 rotate, and after the first screw rod 212 rotates, the pressing seat 213 threadedly connected with the first screw rod 212 can be moved downward, when the arc surface of the pressing seat 213 contacts the barrel part 51, the knob 211 is tightened, and the syringe 5 can be fixed more firmly. It can be understood that the upper surface of the mounting seat 1 can be provided with a mounting rod 12, the other end of the pressing seat 213 is provided with a second through hole, and the inner wall of the second through hole is slidably connected with the mounting rod 12. In this way, the stability of the pressing seat 213 during lifting can be ensured. The end of the mounting rod 12 away from the mounting seat 1 is provided with a limiting block, which can prevent the pressing seat 213 from moving beyond the stroke. Among them, the arc surface of the pressing seat 213 is large, which can fit the barrel part 51 with larger size.

[0024] In some embodiments of this application, the mounting base 1 is provided with a rectangular slide groove 11, and the push-pull assembly 4 includes a motor 44, a second lead screw 41, and a movable seat 42. The motor 44 is disposed inside the mounting base 1 and electrically connected to the distance detection mechanism 3. One end of the second lead screw 41 is rotatably connected to the inner wall of the mounting base 1, and the other end is fixedly connected to the output end of the motor 44. The movable seat 42 is threadedly connected to the outer wall of the second lead screw 41, and the outer wall of the movable seat 42 is slidably connected to the inner wall of the rectangular slide groove 11. A movable block 43 is fixedly connected to the top of the movable seat 42, and the movable block 43 is used to engage the needle tail 52.

[0025] When the motor 44 starts, it drives the second lead screw 41 to rotate, which in turn causes the movable seat 42, which is threadedly connected to the second lead screw 41, to move along the length direction of the second lead screw 41, that is, along the length direction of the syringe barrel 51. This causes the movable block 43 to drive the needle tail 52 to move linearly inside the syringe barrel 51. When the needle tail 52 moves to a preset distance, the distance detection mechanism 3 will stop the motor 44, thereby allowing the syringe 5 to draw a fixed amount of reagent. The outer wall of the movable seat 42 is slidably connected to the inner wall of the rectangular slide groove 11, which ensures the stability of the movable seat 42 during movement.

[0026] Furthermore, the needle tail 52 has a second ear seat, and the moving block 43 includes a first locking plate 431, a second locking plate 432, and a fixing block 433. The second locking plate 432 has a U-shaped notch, and the fixing block 433 is fixedly connected to the moving base 42. The surface of the fixing block 433 away from the moving base 42 is fixedly connected to the first locking plate 431 and the second locking plate 432. The portion of the fixing block 433 located between the first locking plate 431 and the second locking plate 432 has a second arc-shaped groove for engaging the second ear seat. 521

[0027] When engaging the second ear, the second ear can be moved from top to bottom between the first locking plate 431 and the second locking plate 432 and inserted into the second arc-shaped slot. The arrangement of the first locking plate 431 and the second locking plate 432 can improve the stability of the engagement of the moving block 43 with the second ear. The needle tail 52 may include the second ear, a piston rod, and a piston. The two ends of the piston rod are fixedly connected to the second ear and the piston. The second ear can be circular. The first locking plate 431 and the second locking plate 432 can be integrally formed with the fixing block 433.

[0028] Furthermore, a slide rod 13 is provided inside the mounting base 1. The bottom of the movable base 42 is slidably connected to the slide rod 13. A helical spring 14 is sleeved on the end of the slide rod 13. One end of the helical spring 14 abuts against the movable base 42, and the other end is fixedly connected to the inner wall of the mounting base 1.

[0029] The sliding rod 13 further enhances the stability of the moving seat 42 during movement. The helical spring 14 acts as a buffer when the moving seat 42 moves to the end of the sliding rod 13, preventing rigid collisions between the moving seat 42 and the end of the sliding rod 13 and the inner wall of the mounting base 1. This protects the components from damage, extends the equipment's service life, and also helps maintain the stability of the entire quantitative extraction operation.

[0030] In some embodiments of this application, the distance detection mechanism 3 includes a circuit board assembly 32, a displacement sensor 31, a switch button 34, and two directional buttons 33. The circuit board assembly 32 is disposed on the mounting base 1 and electrically connected to the motor 44 to transmit a shut-off signal to the motor 44 based on the distance signal of the needle tail 52's movement, thereby stopping the movement of the needle tail 52. The displacement sensor 31 is disposed on the moving block 43 and electrically connected to the circuit board assembly 32 to transmit the distance signal of the needle tail 52's movement to the circuit board assembly 32. The switch button 34 is disposed on the mounting base 1 and electrically connected to the motor 44 to start the motor 44. The two directional buttons 33 are disposed on the circuit board assembly 32 and electrically connected to the motor 44 to change the direction of the motor 44's output.

[0031] When reagent needs to be drawn, pressing the switch button 34 starts the motor 44, causing the needle tail 52 to move within the syringe 51. The moving block 43 and the needle tail 52 move synchronously, covering the same distance. The displacement sensor 31, located on the moving block 43, detects the movement distance of the needle tail 52 and feeds this signal back to the circuit board assembly 32 in real time. When the circuit board assembly 32 receives a signal that the needle tail 52 has moved to a preset distance, it shuts off the motor 44, stopping the movement of the needle tail 52 and enabling precise quantitative reagent extraction. By pressing one of the two directional buttons 33, the output of the motor 44 can be rotated forward when it is started; pressing the other directional button 33 can rotate the output of the motor 44 in reverse, discharging the reagent from the syringe 51. It is understood that the mounting base 1 can be gun-shaped, and the switch button 34 can be located on the gunstock of the mounting base 1 for ease of use.

[0032] In some embodiments of this application, the syringe portion 51 has a first ear seat 511, and the fixing component 2 further includes a retainer 23 and a placement seat 22. The retainer 23 is fixedly installed on the mounting base 1, and the retainer 23 is provided with a first arc-shaped retaining groove for engaging the first ear seat 511. The placement seat 22 is fixedly installed on the mounting base 1, and the surface of the placement seat 22 away from the mounting base 1 is arc-shaped.

[0033] The syringe portion 51 may include a syringe, with a first lug 511 circumferentially disposed at the end of the syringe. By engaging the first lug 511 into a matching first arc-shaped groove, the fixation effect on the syringe 5 can be further improved, making the syringe 5 more stably fixed on the mounting base 1. Furthermore, by first engaging the first lug 511 into the first arc-shaped groove, placing the syringe portion 51 on the arc-shaped surface of the placement base 22, the syringe 5 can be prevented from rolling or falling off the mounting base 1 before the pressure seat 213 moves up and down, facilitating the fixation operation of the syringe 5.

[0034] Working principle: In use, place the syringe 5 on the upper surface of the mounting base 1, with the syringe 5 directly below the pressure seat 213. Rotate the knob 211 to rotate the first lead screw 212, which in turn moves the pressure seat 213 downward to contact the outer surface of the syringe barrel 51 and presses it to fix the syringe barrel 51, thus enabling the fixation of syringes 5 of different sizes. Pressing the switch button 34 starts the motor 44, causing the second lead screw 41 to rotate, which in turn moves the moving seat 42 along the length of the syringe barrel 51. This causes the moving block 43 to drive the needle tail 52 to move inside the syringe barrel 51. When the needle tail 52 moves to a preset distance, the circuit board assembly 32 stops the motor 44, allowing the syringe 5 to draw a fixed amount of reagent.

[0035] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A reagent quantitative extraction device, comprising a syringe (5) for extracting reagents, said syringe (5) comprising a syringe barrel (51) and a needle tail (52), characterized in that, Also includes: Mounting base (1) for placing the syringe part (51); A fixing component (2) is disposed on the mounting base (1). The fixing component (2) includes a clamping part (21) movable in the vertical direction for clamping and fixing syringe parts (51) of different sizes onto the mounting base (1); and, A push-pull assembly (4) is disposed on the mounting base (1) and electrically connected to a distance detection mechanism (3). The push-pull assembly (4) is connected to the needle tail (52) and is used to make the needle tail (52) move at equal distances within the syringe (51) under the drive of the distance detection mechanism (3) so as to quantitatively extract the reagent.

2. The reagent quantitative extraction device according to claim 1, characterized in that, The clamping part (21) includes: A fixed column is fixedly installed on the mounting base (1); The first lead screw (212) is rotatably connected to the fixed column at one end and fixedly connected to a knob (211) at the other end; and, The pressure seat (213) has a first through hole at one end, and the inner wall of the first through hole is threaded to the first lead screw (212). The pressure seat (213) is arranged in an arc shape near the surface of the mounting base (1).

3. The reagent quantitative extraction device according to claim 2, characterized in that, The mounting base (1) is provided with a rectangular sliding groove (11), and the push-pull assembly (4) includes: A motor (44) is disposed inside the mounting base (1) and electrically connected to the distance detection mechanism (3); The second lead screw (41) is rotatably connected at one end to the inner wall of the mounting base (1), and fixedly connected at the other end to the output end of the motor (44); and, The movable seat (42) is threaded to the outer wall of the second lead screw (41). The outer wall of the movable seat (42) is slidably connected to the inner wall of the rectangular slide groove (11). A movable block (43) is fixedly connected to the top of the movable seat (42). The movable block (43) is used to engage the needle tail (52).

4. The reagent quantitative extraction device according to claim 3, characterized in that, The distance detection mechanism (3) includes: A circuit board assembly (32) is disposed on the mounting base (1). The circuit board assembly (32) is electrically connected to the motor (44) to transmit a shut-off signal to the motor (44) according to the distance signal of the movement of the needle tail (52) to stop the movement of the needle tail (52). A displacement sensor (31) is disposed on the moving block (43) and electrically connected to the circuit board assembly (32) to transmit the distance signal of the movement of the needle tail (52) to the circuit board assembly (32); A switch button (34), disposed on the mounting base (1) and electrically connected to the motor (44), is used to start the motor (44); and, Two steering buttons (33) are located on the circuit board assembly (32) and electrically connected to the motor (44) to change the direction of the output of the motor (44).

5. The reagent quantitative extraction device according to claim 2, characterized in that, The syringe portion (51) has a first ear seat (511), and the fixing assembly (2) further includes: A card holder (23) is fixedly installed on the mounting base (1), and the card holder (23) is provided with a first arc-shaped card groove for engaging the first ear seat (511); and, The placement seat (22) is fixedly installed on the mounting seat (1), and the surface of the placement seat (22) away from the mounting seat (1) is arc-shaped.

6. The reagent quantitative extraction device according to claim 3, characterized in that, The needle tail (52) has a second ear seat. The moving block (43) includes a first locking plate (431), a second locking plate (432), and a fixing block (433). The second locking plate (432) has a U-shaped notch. The fixing block (433) is fixedly connected to the moving seat (42). The surface of the fixing block (433) away from the moving seat (42) is fixedly connected to the first locking plate (431) and the second locking plate (432). The portion of the fixing block (433) located between the first locking plate (431) and the second locking plate (432) has a second arc-shaped groove for engaging the second ear seat (521).

7. The reagent quantitative extraction device according to claim 3, characterized in that, The mounting base (1) is provided with a slide rod (13) inside. The bottom of the movable base (42) is slidably connected to the slide rod (13). A helical spring (14) is sleeved on the end of the slide rod (13). One end of the helical spring (14) abuts against the movable base (42), and the other end is fixedly connected to the inner wall of the mounting base (1).

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