Blood culture quantitative sampling device

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a blood culture measuring and collecting device which comprises a needle cylinder and a needle head, the needle head is fixedly connected to one end of the needle cylinder, a piston block is movably connected to the interior of the needle cylinder, and a pull rod is fixedly connected to the side, away from the needle head, of the piston block. Through the cooperation of the piston block, the clamping block, the pull rod, the spring, the clamping groove and other structures, the collection stability is good, the pull rod is pressed, the spring is compressed, gas enters the right end of the piston block through the gas inlet film, when the piston block drives the clamping block to move, the clamping block can be attracted through the magnetic force of the first magnetic ring at the clamping groove, and the clamping block is clamped into the clamping groove; a first magnetic ring and a second magnetic ring slide along a sliding groove, the first magnetic ring and a clamping block are staggered, and the second magnetic ring repels the clamping block through magnetic force, so that the clamping block is reset to a piston block, gas can be slowly discharged through a gas inlet film, blood can be sucked into a needle cylinder through a needle head, and the collection stability of the device is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, in particular to a blood culture and volume sampling device. Background Art

[0002] Blood culture is an artificial culture method in which a fresh blood specimen is inoculated onto a nutrient medium under certain temperature, humidity and other conditions to allow bacteria with higher nutritional requirements to grow and multiply and identify them, thereby determining the pathogens. When collecting blood, a syringe is often required for quantitative collection.

[0003] In the prior art, the needle of a syringe is usually inserted into a blood sample, and the syringe is held with one hand while the other hand performs the extraction operation. However, since the extraction is usually performed manually, it is difficult to accurately control the extraction force. If the force is not stable, the needle may be easily tilted and damaged. A blood culture volume sampling device is now proposed to solve the above problems. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a blood culture volume sampling device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a blood culture volume sampling device, comprising a syringe and a needle, one end of the syringe is fixedly connected to the needle, the inside of the syringe is movably connected to a piston block, a pull rod is fixedly connected to the side of the piston block away from the needle, and clamping blocks are movably connected to the upper and lower sides of the piston block away from the needle, the end of the pull rod away from the piston block is elastically connected to one end of a spring, the outer end of the spring is sleeved with a limiting tube, an air intake membrane is arranged in a ring array at the end of the syringe away from the needle, a clamping groove is provided at the inner end of the syringe close to the needle, a first magnetic ring is sleeved on the outer circumferential surface of the end of the syringe close to the needle, and a second magnetic ring is fixedly connected to the side of the first magnetic ring close to the needle.

[0006] Preferably, the cross section of the pull rod is a cross-shaped structure, and the outer peripheral surface of the pull rod is movably connected to the middle part of the syringe.

[0007] Preferably, the other end of the spring is elastically connected to the syringe, the two ends of the limiting tube are respectively fixedly connected to the syringe and the pull rod, and the limiting tube is made of flexible fabric.

[0008] Preferably, the air inlet membrane is a trumpet-shaped structure made of soft material with a narrow left end and a wide right end, and the side of the clamping block away from the pull rod is movably connected to the inner wall of the syringe.

[0009] Preferably, the position of the slot is horizontal to the position of the block, and the first magnetic ring is located at the outer end of the slot.

[0010] Preferably, the clamping block is made of metal, and the magnetism of the inner ring of the first magnetic ring is opposite to the magnetism of the inner ring of the second magnetic ring.

[0011] Preferably, the second magnetic ring is sleeved on the outer circumferential surface of the syringe, and the outer circumferential surface of the syringe is provided with a sliding groove for limiting sliding of the first magnetic ring and the second magnetic ring.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model has good collection stability through the cooperation of structures such as a piston block, a card block, a pull rod, a spring and a card slot. By pressing the pull rod and compressing the spring, gas enters the right end of the piston block through the air intake membrane, so that when the piston block drives the card block to move, the card block can be adsorbed by the magnetic force of the first magnetic ring, so that the card block is stuck in the card slot, and the piston block can be limited by the card block. By inserting the needle into the blood sample, by sliding the first magnetic ring and the second magnetic ring along the slide groove, the first magnetic ring and the card block are misaligned, and the second magnetic ring repels the card block through the magnetic force, so that the card block is reset to the piston block, and the piston block can be pulled to reset by the elastic force of the spring, and the gas at the right end of the piston block pushes the air intake membrane to deform, so that the gas can be slowly discharged through the air intake membrane, and the piston block can be damped, so that the piston block can slowly move to the right through the elastic force of the spring, so that blood can be sucked into the syringe through the needle, so that the device has good collection stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the front section of the utility model;

[0016] Figure 3 For this utility model Figure 2 A magnified schematic diagram of point A;

[0017] Figure 4 For this utility model Figure 2 An enlarged schematic diagram of point B;

[0018] Figure 5 This is a schematic diagram of the position relationship of the syringe, pull rod, spring, limit tube, and air intake membrane of the utility model;

[0019] Figure 6 It is a schematic diagram of the disassembly of the utility model.

[0020] In the figure: 1. syringe; 2. needle; 3. piston block; 4. clamping block; 5. pull rod; 6. spring; 7. limit tube; 8. air intake membrane; 9. clamping groove; 10. first magnetic ring; 11. second magnetic ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figures 1 to 6 As shown, the utility model provides a blood culture volume sampling device, including a syringe 1 and a needle 2, one end of the syringe 1 is fixedly connected to the needle 2, the inside of the syringe 1 is movably connected to a piston block 3, a pull rod 5 is fixedly connected to the side of the piston block 3 away from the needle 2, and a clamping block 4 is movably connected to the upper and lower sides of the side of the piston block 3 away from the needle 2, and the end of the pull rod 5 away from the piston block 3 is elastically connected to one end of a spring 6, and a limiting tube 7 is sleeved on the outer end of the spring 6. An air intake membrane 8 is arranged in a circular array at the end of the syringe 1 away from the needle 2, a clamping groove 9 is opened at the inner end of the syringe 1 close to the needle 2, and a first magnetic ring 10 is sleeved on the outer circumferential surface of the end of the syringe 1 close to the needle 2, and a second magnetic ring 11 is fixedly connected to the side of the first magnetic ring 10 close to the needle 2;

[0023] By pressing the pull rod 5 and compressing the spring 6, the gas enters the left end of the piston block 3 through the air intake membrane 8, so that the piston block 3 drives the card block 4 to move to the card slot 9, and the card block 4 can be adsorbed by the magnetic force of the first magnetic ring 10, so that the card block 4 is stuck in the card slot 9, and the piston block 3 can be limited by the card block 4, and the needle 2 is inserted into the blood sample, and the first magnetic ring 10 and the second magnetic ring 11 are slid along the slide groove, and the first magnetic ring 10 and the card block 4 are misaligned, and the second magnetic ring 11 repels the card block 4 through magnetic force, so that the card block 4 is reset to the piston block 3, and the elastic force of the spring 6 can pull the piston block 3 to reset, so that the piston block 3 can slowly move to the right through the elastic force of the spring 6, so that blood can be sucked into the syringe 1 through the needle 2, so that the device has good stability when collecting blood.

[0024] like Figure 2 , Figure 5 and Figure 6 As shown, the cross section of the pull rod 5 is a cross-shaped structure, the outer peripheral surface of the pull rod 5 is movably connected to the middle of the syringe 1, the other end of the spring 6 is elastically connected to the syringe 1, the two ends of the limit tube 7 are respectively fixed to the syringe 1 and the pull rod 5, the limit tube 7 is made of flexible fabric, and the position of the card slot 9 is horizontal to the position of the card block 4;

[0025] By cooperating with the syringe 1 through the cross-shaped structure, the pull rod 5 can be limited, so that the block 4 can be attracted by the first magnetic ring 10 after moving to the left, thereby engaging with the slot 9. The spring 6 and the limiting tube 7 can be limited by the syringe 1, and the spring 6 can be protected by the limiting tube 7.

[0026] like Figures 2 to 4 , Figure 6 As shown, the air intake membrane 8 is a trumpet-shaped structure made of soft material with a narrow left end and a wide right end. The side of the clamping block 4 away from the pull rod 5 is movably connected to the inner wall of the syringe 1. The first magnetic ring 10 is located at the outer end of the clamping groove 9. The clamping block 4 is made of metal. The magnetism of the inner ring of the first magnetic ring 10 is opposite to the magnetism of the inner ring of the second magnetic ring 11. The second magnetic ring 11 is sleeved on the outer peripheral surface of the syringe 1. The outer peripheral surface of the syringe 1 is provided with a sliding groove for limiting the sliding of the first magnetic ring 10 and the second magnetic ring 11.

[0027] When the piston block 3 moves to the left, the gas can enter the syringe 1 through the air intake membrane 8, and the gas is located at the right end of the piston block 3; by sliding the first magnetic ring 10 and the second magnetic ring 11 along the slide groove, the first magnetic ring 10 and the clamping block 4 are misaligned, and the second magnetic ring 11 repels the clamping block 4 through magnetic force, and the clamping block 4 is not engaged with the clamping groove 9, so that when the piston block 3 is reset to the right, the air pressure squeezes the air intake membrane 8, causing the air intake membrane 8 to deform, and the air intake membrane 8 is a trumpet-shaped structure with a narrow left end and a wide right end, so that the gas discharge is restricted, thereby damping the piston block 3, and preventing the spring 6 from being too large and causing the piston block 3 to reset too quickly, and the first magnetic ring 10 and the second magnetic ring 11 can be limited by the slide groove.

[0028] The working principle and use process of this utility model:

[0029] First, the operator presses the pull rod 5 to compress the spring 6, and the gas enters the left end of the piston block 3 through the air intake membrane 8, so that the piston block 3 drives the card block 4 to move to the card slot 9, and the card block 4 can be adsorbed by the magnetic force of the first magnetic ring 10, so that the card block 4 is stuck in the card slot 9, and the piston block 3 can be limited by the card block 4, and the needle 2 is inserted into the blood sample, and the first magnetic ring 10 and the second magnetic ring 11 are slid along the slide groove, The first magnetic ring 10 is misaligned with the card block 4, and the second magnetic ring 11 repels the card block 4 through magnetic force, so that the card block 4 is reset to the piston block 3, and the piston block 3 can be pulled to reset by the elastic force of the spring 6. The gas at the left end of the piston block 3 pushes the air intake membrane 8 to deform, so that the gas can be slowly discharged through the air intake membrane 8, and the piston block 3 can be damped, so that the piston block 3 can slowly move to the right through the elastic force of the spring 6, so that blood can be sucked into the syringe 1 through the needle 2, and the operation is completed.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blood culture volume sampling device, comprising a syringe (1) and a needle (2), wherein one end of the syringe (1) is fixedly connected to the needle (2), Features: The syringe (1) is movably connected to a piston block (3) inside, a pull rod (5) is fixedly connected to the side of the piston block (3) away from the needle (2), and blocks (4) are movably connected to the upper and lower sides of the side of the piston block (3) away from the needle (2). The end of the pull rod (5) away from the piston block (3) is elastically connected to one end of a spring (6), and the outer end of the spring (6) is sleeved with a limit tube (7). An air intake membrane (8) is arranged in a circular array at the end of the syringe (1) away from the needle (2). A clamping groove (9) is provided at the inner end of the syringe (1) close to the needle (2). A first magnetic ring (10) is sleeved on the outer circumference of the end of the syringe (1) close to the needle (2), and a second magnetic ring (11) is fixedly connected to the side of the first magnetic ring (10) close to the needle (2).

2. The blood culture volume sampling device according to claim 1, Features: The cross section of the pull rod (5) is a cross-shaped structure, and the outer peripheral surface of the pull rod (5) is movably connected to the middle part of the syringe (1).

3. The blood culture volume sampling device according to claim 1, Features: The other end of the spring (6) is elastically connected to the syringe (1), and the two ends of the limiting tube (7) are respectively fixedly connected to the syringe (1) and the pull rod (5), and the limiting tube (7) is made of flexible fabric.

4. The blood culture volume sampling device according to claim 1, Features: The air intake membrane (8) is a trumpet-shaped structure made of soft material with a narrow left end and a wide right end. The side of the clamping block (4) away from the pull rod (5) is movably connected to the inner wall of the syringe (1).

5. The blood culture volume sampling device according to claim 1, Features: The position of the clamping slot (9) is parallel to that of the clamping block (4), and the first magnetic ring (10) is located at the outer end of the clamping slot (9).

6. The blood culture volume sampling device according to claim 1, Features: The clamping block (4) is made of metal, and the magnetism of the inner ring of the first magnetic ring (10) is opposite to the magnetism of the inner ring of the second magnetic ring (11).

7. The blood culture volume sampling device according to claim 1, Features: The second magnetic ring (11) is sleeved on the outer circumferential surface of the syringe (1), and the outer circumferential surface of the syringe (1) is provided with a sliding groove for limiting the sliding of the first magnetic ring (10) and the second magnetic ring (11).

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