CN111855311A - A high-precision sampler for medical experiments - Google Patents

Abstract

The invention discloses a high-precision sampler for medical experiments, comprising an outer casing, a pulling column, a needle tube and a handle, an inner lining tube is also arranged between the outer casing and the pulling column, and the front end of the inner lining tube is connected to the outer casing On the tube, and through connection with the needle tube, and the inside of the lining tube is slidably fitted with a twitching column. The front end of the needle tube is completely submerged in the solution to prevent the needle tube from accidentally pumping air during the sampling process. Slowly pull the handle so that the handle drives the twitching column to fit and slide along the inner wall of the liner tube. When a certain amount of solution is extracted, observe and measure The scale on the ruler, at this time, because there is no air in the lining tube, the distance moved by the pumping column relative to the lining tube can be substituted into the volume formula, and the volume moved by the pumping column can be calculated, and the obtained volume is the volume of the extracted solution, is the sum of the volume of solution in the needle tube and in the liner tube.

Description

A high-precision sampler for medical experiments

technical field

The invention relates to a sampler, in particular to a high-precision sampler for medical experiments.

Background technique

At present, the most widely used sampler in the medical field is the needle tube sampler, but the scale engraved on the outer sleeve of this sampler cannot truly reflect the volume of the extracted solution, because the scale measured by the scale is only the inner liner tube. The volume of the solution in the needle tube is not included, so the measurement accuracy is low. Therefore, there is a need for a high-precision sampler, which is convenient for users to study and sample.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-precision sampler for medical experiments to solve the problems raised in the above-mentioned background art.

To achieve the above object, the present invention provides the following technical solutions:

A high-precision sampler for medical experiments, comprising an outer casing, a twitching column, a needle tube and a handle, one end of the twitching column is fixedly connected with the handle, the other end extends into the inner wall of the outer casing, and the front end of the outer casing is also connected by The tube is connected with a needle tube, an inner lining tube is also arranged between the outer sleeve and the pumping column, the front end of the inner lining tube is connected to the outer sleeve, and is connected with the needle tube, and the inside of the inner lining tube is slidably fitted There is a twitching column, and a second sealing ring is adhered to the circumferential surface of the twitching column, and a first sealing ring is also adhered to the front end; a measuring ruler is also fixedly connected on the circumferential surface of the twitching column, and the measuring ruler and the There is a gap between the inner lining pipes, and the measuring ruler is also engraved with a measurement scale; the circumferential surface of the inner lining pipe is also sleeved with a positioning block matching the measuring ruler.

As a further solution of the present invention: the measuring ruler includes a front end and a rear end, the front end is close to the positioning block, and the size of the scale on the measuring ruler increases sequentially according to the path from the rear end to the front section.

As a further solution of the present invention: the front end of the outer sleeve is also provided with a dander sampling mechanism, the dander sampling mechanism includes a rotating disk, a moving disk and a clamping rod, and the inner side of the rotating disk is connected by rolling balls. The connecting plate is fixedly connected to the end surface of the outer sleeve, and the number of the balls is multiple; the rotating plate is also provided with a clamping slot, and the clamping slot is engaged with one end of the clamping rod. The other end of the rod is fixedly connected to the moving disk, and the number of the clamping rods is multiple; the end surface of the moving disk is also fixedly connected with several sampling claws.

As a further solution of the present invention, each sampling claw is provided with a chip storage groove.

As a further solution of the present invention: it also includes a needle changing mechanism, the needle changing mechanism includes a positioning disc, a needle cover, a needle tube and a positioning rod, and a chuck is rotatably connected in the middle of the positioning disk; one end of the positioning rod is threaded through It is set in a small hole opened on the handle, and the other end is fixedly connected to the chuck; the circumferential surface of the positioning plate is detachably connected with a needle cover, and the number of the needle cover is multiple; the needle cover A needle tube is penetrated inside.

As a further solution of the present invention, the end face of the positioning plate is provided with several card slots, and the plurality of card slots are equally angularly distributed on the positioning plate;

As a further solution of the present invention: the cross-sectional shapes of the positioning plate and the chuck are circular, and the two are arranged concentrically; one end of the clamping block is fixedly connected to the center of the chuck, and the other end is clamped to the clamping in the groove; the needle sleeve, the clamping groove matching the needle sleeve and the center of the chuck are located on the same straight line.

Compared with the prior art, the beneficial effects of the present invention are:

1. Before use, push the handle so that the handle pushes the twitching column to make an exhaust movement along the inner wall of the lining pipe, and when the front end of the first sealing ring is against the front end of the lining pipe, the measuring ruler is The front end of the measuring ruler is just in contact with the positioning block, and at this time, the rear end of the measuring ruler and the outer edge of the outer casing are set to 0 scale; when using, the front end of the needle tube is completely immersed in the solution to prevent the needle tube during the sampling process. Accidentally pumped air, resulting in errors in the final measurement results. Slowly pull the handle so that the handle drives the twitching column to fit and slide along the inner wall of the liner tube. When a certain amount of solution is extracted, look up at the measuring ruler and observe the measuring ruler. At this time, because there is no air in the lining tube, the distance moved by the pumping column relative to the lining tube can be substituted into the volume formula, and the volume moved by the pumping column can be calculated, and the obtained volume is the volume of the extracted solution, that is is the sum of the volume of solution in the syringe and in the liner.

2. In the present invention, a mechanism for scraping dandruff is also designed. When the above embodiment is applied to blood sampling, it is often necessary to sample the epidermal tissue of the sampled person, and this design can simultaneously perform blood sampling. Sampling with epidermal tissue saves more time; specifically, when in use, the moving disk and the rotating disk are pulled apart by the clamping action of the clamping rod, and then the moving disk is rotated, so that the moving disk drives the clamping rod, which in turn drives the rotating disk. Rotation, because the rotating disk and the connecting disk are connected by rolling balls, and the connecting disk is fixedly connected to the outer casing, so the rotating disk can rotate relative to the outer casing, and then the moving disk can drive the sampling claw on the skin surface. scraping the dandruff; more specifically, the sampling claw is also provided with a chip storage groove, so that the scraped dandruff tissue can be further stored to ensure the thoroughness of one-time sampling.

3. Insert one end of the positioning rod into the small hole on the handle, straighten the positioning rod, and rotate the positioning disc, so that the positioning disc drives the needle sleeve to rotate relative to the chuck, and the clamping block is fixedly connected with the chuck, so when the clamping block rotates When it is clamped on the slot on the positioning plate, the needle cover can be correspondingly rotated to the position where the connecting tube of the needle tube is inserted, and because the needle cover and the positioning plate are detachably connected, the needle cover can Drive the needle tube, directly insert the needle tube into the connecting tube, and repeat the above operation when the needle needs to be changed.

Description of drawings

FIG. 1 is a schematic structural diagram of a high-precision sampler for medical experiments.

Figure 2 is a schematic diagram of the installation of a measuring ruler in a high-precision sampler for medical experiments.

FIG. 3 is a schematic structural diagram of a dander sampling mechanism in a high-precision sampler for medical experiments.

FIG. 4 is a schematic structural diagram of a rotating disk and a connecting disk in a high-precision sampler for medical experiments.

FIG. 5 is a schematic structural diagram of a needle changing mechanism in a high-precision sampler for medical experiments.

FIG. 6 is a schematic structural diagram of a positioning plate and a chuck in a high-precision sampler for medical experiments.

In the picture: 1- Outer casing, 2- Lining pipe, 3- Positioning block, 4- Tipping column, 5- Measuring ruler, 6- Second sealing ring, 7- First sealing ring, 8- Dander sampling mechanism, 81-Rotating disk, 82-Moving disk, 83-Sampling claw, 84-Clamping rod, 85-Ball ball, 86-Connecting disk, 9-Handle, 10-Positioning rod, 11-Positioning disk, 12-Needle sleeve, 13- Needle tube, 14-connecting tube, 15-chuck, 16-card slot, 17-block.

Detailed ways

The technical solutions of the present invention will be described in further detail below in conjunction with specific embodiments.

Example 1

Please refer to FIGS. 1-6 , a high-precision sampler for medical experiments, comprising an outer cannula 1, a twitching column 4, a needle tube 13 and a handle 9, one end of the twitching column 4 is fixedly connected with the handle 9, and the other end extends into the outer cannula In the inner wall of 1, the front end of the outer sleeve 1 is also connected with a needle tube 13 through a connecting pipe 14, and an inner liner 2 is also provided between the outer sleeve 1 and the pumping column 4, and the front end of the inner liner 2 is connected. On the outer sleeve 1, and through connection with the needle tube 13, and the inside of the inner liner tube 2 is slidably fitted with a twitching column 4, the circumferential surface of the twitching column 4 is also bonded with a second sealing ring 6, and the front end is The first sealing ring 7 is bonded; the circumferential surface of the twitching column 4 is also fixedly connected with a measuring ruler 5, and there is a gap between the measuring ruler 5 and the lining pipe 2, and the measuring ruler 5 is also engraved with a measurement Scale; the circumferential surface of the inner lining pipe 2 is also sleeved with a positioning block 3 matching the measuring ruler 5 .

The measuring ruler 5 includes a front end and a rear end, the front end is close to the positioning block 3, and the scale size on the measuring ruler 5 increases sequentially according to the path from the rear end to the front section.

Before use, push the handle 9 so that the handle 9 pushes the pumping column 4 to do the exhausting motion along the inner wall of the lining pipe 2, and when the front end of the first sealing ring 7 is against the front end of the lining pipe 2, At this time, the front end of the measuring ruler 5 is just in contact with the positioning block 3, and at this time, the rear end of the measuring ruler 5 and the outer edge of the outer casing 1 are set to 0 scale; when in use, the front end of the needle tube 13 is completely Submerged in the solution to prevent the needle tube 13 from accidentally pumping air during the sampling process, resulting in errors in the final measurement results, slowly pull the handle 9, so that the handle 9 drives the twitching column 4 to fit and slide along the inner wall of the liner tube 2. After a certain amount of solution, look up at the measuring ruler 5 and observe the scale on the measuring ruler 5. At this time, because there is no air in the lining pipe 2, the distance moved by the pumping column 4 relative to the lining pipe 2 can be substituted into the volume formula, that is, The volume moved by the pumping column 4 can be calculated, and the obtained volume is the volume of the extracted solution, that is, the sum of the volume of the solution in the needle tube 13 and the inner liner tube 2 .

Example 2

In order to improve the sampling efficiency of the present invention, an improvement is added on the basis of Example 1. The improvement is: please refer to Figures 1-6, the front end of the outer sleeve 1 is also provided with a dander sampling mechanism 8, The dander sampling mechanism 8 includes a rotating disk 81 , a moving disk 82 and a clamping rod 84 . The inner side of the rotating disk 81 is rollingly connected with a connecting disk 86 through a ball 85 , and the connecting disk 86 is fixedly connected to the end face of the outer casing 1 . The number of the balls 85 is multiple; the rotating plate 81 is also provided with a slot, and the slot is engaged with one end of the clamping rod 84, and the other end of the clamping rod 84 is fixedly connected to the moving plate. 82 , the number of the clamping rods 84 is multiple; the end surface of the moving plate 82 is also fixedly connected with several sampling claws 83 .

Each sampling claw 83 is provided with a chip storage groove. In the present invention, a mechanism for scraping dandruff is also designed. When the above embodiment is applied to blood sampling, it is often necessary to sample the epidermal tissue of the sampled person, and this design can achieve simultaneous sampling of blood and epidermis. Organization for sampling, saving time;

Specifically, during use, the movable disk 82 and the rotating disk 81 are pulled apart by the engaging action of the clamping rod 84, and then the movable disk 82 is rotated, so that the movable disk 82 drives the clamping rod 84, and then drives the rotating disk 81 to rotate, because The rotating disk 81 and the connecting disk 86 are connected by rolling balls 85, and the connecting disk 86 is fixedly connected to the outer casing 1, so the rotating disk 81 can rotate relative to the outer casing 1, and then the moving disk 82 can drive the The sampling claw 83 scrapes dander on the skin surface;

More specifically, the sampling claw 83 is also provided with a chip storage groove, so that the scraped dandruff tissue can be further stored, so as to ensure the thoroughness of one-time sampling.

Example 3

The present invention also designs a needle changing mechanism on the basis of the above-mentioned embodiment, please refer to Figs. 1-6, and also includes a needle changing mechanism. The needle changing mechanism includes a positioning disc 11, a needle sleeve 12, a needle tube 13 and a positioning rod 10. A chuck 15 is rotatably connected to the middle of the positioning plate 11; one end of the positioning rod 10 is inserted into a small hole opened on the handle 9, and the other end is fixedly connected to the chuck 15; the positioning plate A needle cover 12 is detachably connected on the circumferential surface of 11 , and the number of the needle cover 12 is multiple; the needle cover 12 is provided with a needle tube 13 .

The end surface of the positioning plate 11 is provided with a plurality of card slots 16 , and the plurality of card grooves 16 are equally angularly distributed on the positioning plate 11 ;

The cross-sectional shapes of the positioning plate 11 and the chuck 15 are both circular, and the two are arranged concentrically; one end of the clamping block 17 is fixedly connected to the center of the chuck 15, and the other end is clamped in the clamping slot 16; The needle sleeve 12 , the clamping groove 16 matched with the needle sleeve 12 and the center of the chuck 15 are located on the same straight line.

Preferably, the present invention also designs a needle changing mechanism on the basis of the above embodiment, because for different sampling objects, the length of the needle tube used may have different requirements, and each time before loading and unloading the needle tube, you must first Alignment, and the small orifice of the needle tube makes it difficult to operate.

Specifically, insert one end of the positioning rod 10 into the small hole on the handle 9, straighten the positioning rod 10, and rotate the positioning disk 11, so that the positioning disk 11 drives the needle cover 12 to rotate relative to the chuck 15, and the block 17 and the chuck 15 Therefore, when the clamping block 17 is rotated and clamped on the clamping slot 16 opened on the positioning plate 11, the needle cover 12 can be rotated correspondingly to the position of the connecting pipe 14 in which the needle tube 13 is inserted. Because the needle cover 12 and the positioning plate 11 are detachably connected, the needle tube 13 can be driven by the needle cover 12, and the needle tube 13 can be directly inserted into the connecting tube 14. When the needle needs to be changed, the above operation can be repeated.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various aspects can also be made without departing from the purpose of the present invention. kind of change.

Claims (7)

1. A high-precision sampler for medical experiments, comprising an outer casing (1), a twitching column (4), a needle tube (13) and a handle (9), and one end of the twitching column (4) is fixedly connected with a handle (9) , the other end extends into the inner wall of the outer sleeve (1), and the front end of the outer sleeve (1) is also connected with a needle tube (13) through a connecting pipe (14), characterized in that the outer sleeve (1) and the twitch An inner lining tube (2) is also arranged between the columns (4), the front end of the inner lining tube (2) is connected to the outer casing (1), and is connected through with the needle tube (13), and the inner lining tube (2) ) is slidably fitted with a twitching column (4), the circumferential surface of the twitching column (4) is further bonded with a second sealing ring (6), and the front end is also bonded with a first sealing ring (7); A measuring ruler (5) is also fixedly connected on the circumferential surface of the pulling column (4), and there is a gap between the measuring ruler (5) and the lining pipe (2), and the measuring ruler (5) is also engraved with a Measuring scale; a positioning block (3) matched with the measuring ruler (5) is also sleeved on the circumferential surface of the inner lining pipe (2). 2. A high-precision sampler for medical experiments according to claim 1, characterized in that the measuring ruler (5) comprises a front end and a rear end, and the front end is close to the positioning block (3), and the measuring ruler (5) The size of the tick on the top increases in turn according to the path from the rear to the front. 3. A high-precision sampler for medical experiments according to claim 1, wherein the front end of the outer sleeve (1) is further provided with a dander sampling mechanism (8), the dander sampling mechanism (8) ) includes a rotating disk (81), a moving disk (82) and a clamping rod (84). The inner side of the rotating disk (81) is rollingly connected with a connecting disk (86) through balls (85). The connecting disk (86) It is fixedly connected to the end surface of the outer sleeve (1), and the number of the balls (85) is multiple; the rotating disc (81) is also provided with a clamping groove, and the clamping groove is locked with one end of the clamping rod (84). The other end of the clamping rod (84) is fixedly connected to the moving plate (82), and the number of the clamping rods (84) is multiple; the end surface of the moving plate (82) is also fixedly connected with a number of sampling paws (83). 4 . The high-precision sampler for medical experiments according to claim 3 , wherein each of the sampling claw ( 83 ) is provided with a chip storage groove. 5 . 5 . The high-precision sampler for medical experiments according to claim 1 , further comprising a needle changing mechanism, wherein the needle changing mechanism comprises a positioning plate ( 11 ), a needle cover ( 12 ), and a needle tube ( 13 ). 6 . and a positioning rod (10), the middle of the positioning plate (11) is rotatably connected with a chuck (15); One end is fixedly connected to the chuck (15); a needle sleeve (12) is detachably connected to the circumferential surface of the positioning plate (11), and the number of the needle sleeves (12) is multiple; the needle sleeve (12) A needle tube (13) is penetrated inside. 6 . The high-precision sampler for medical experiments according to claim 5 , wherein several card slots ( 16 ) are opened on the end surface of the positioning plate ( 11 ), and the several card slots ( 16 ) are equal. 7 . The angle is distributed on the positioning plate (11); the end face of the chuck (15) is also fixedly connected with a clamping block (17). 7 . The high-precision sampler for medical experiments according to claim 6 , wherein the cross-sectional shapes of the positioning plate ( 11 ) and the chuck ( 15 ) are both circular, and the two are concentrically arranged; 7 . One end of the clamping block (17) is fixedly connected to the center of the chuck (15), and the other end is clamped in the clamping slot (16); The center of the groove (16) and the chuck (15) are located on the same straight line.

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