Pediatric blood extractor

Abstract

The application relates to the technical field of medical instruments, in particular to a pediatric blood extractor which comprises a base, the base is fixedly connected with a device rack, the inner wall of the device rack is rotationally connected with symmetrically-arranged adjusting rings, the adjusting rings are fixedly connected with adjusting racks, the adjusting racks are slidably connected with fixing sleeves, a tourniquet is clamped between the two fixing sleeves, a transmission mechanism is rotationally connected to the inner wall of the base, the inner wall of the base is slidably connected with a gas pressing plate, and the base is fixedly connected with a placing sleeve. The two oppositely-rotating adjusting rings can drive the tourniquet clamped by the fixing sleeves to be bound, the fixing sleeves can be moved under the action of the arc-shaped rack, the two ends of the tourniquet can be cross-bound, manual binding is replaced, the stability and effect of the binding are improved, the situation that the traditional manual binding is locally too tight or too loose can be avoided, and the reliability of the binding is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to a pediatric blood-drawing device. Background Technology

[0002] A phlebotomy kit is a medical device used to collect blood samples from the human body (usually from veins). It is widely used in clinical diagnosis, blood tests, blood donation, and other applications. The design of a phlebotomy kit can vary depending on its intended use, target population (adults or children), and the method of blood collection.

[0003] The prior art publication CN213282941U provides a pediatric blood-drawing device. By setting up an adjustment device including a first connecting block, a first rotating shaft, a fixing screw, a bearing seat, a bearing, a rotating screw and a screw groove, and a support device including a guide frame, a second connecting block, a second rotating shaft, a support rod and a moving block, the device achieves both adjustment and fixation of the mounting plate, making the mounting plate and display screen more stable. The device has a simple structure, is easy to operate, and is highly practical.

[0004] Current technology requires medical staff to manually apply a tourniquet to the upper part of the patient's arm during blood draws from the antecubital vein in children. Manually applying the tourniquet requires additional time and effort, increasing the workload of medical personnel. Especially in emergency situations or when multiple blood draws need to be completed quickly, manual application can lead to delays and affect blood draw efficiency.

[0005] In summary, the existing technology lacks a technique for automatically applying a tourniquet when drawing blood from the antecubital vein in children. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by proposing a pediatric blood-drawing device.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a pediatric blood-drawing device, comprising a base, an equipment frame fixedly connected to the base, an adjusting ring rotatably connected to the inner wall of the equipment frame in a symmetrical structure, an adjusting frame fixedly connected to the adjusting ring, a fixing sleeve slidably fitted to the adjusting frame, a pressure band clamped between the two fixing sleeves, a transmission mechanism rotatably connected to the inner wall of the base, an air pressure plate slidably fitted to the inner wall of the base, and a placement sleeve fixedly connected to the base.

[0008] Preferably, the bottom inner wall of the base is provided with an air storage cavity, and both sides of the top surface of the base are provided with multiple placement holes in a linear structure.

[0009] Preferably, the top two sides of the equipment frame are symmetrically connected with hanging rods, and two limiting rods are symmetrically arranged below the hanging rods. One end of each limiting rod is fixedly connected to the equipment frame. Multiple disposable blood-drawing needle tubings are placed on the hanging rods. The inner wall of the equipment frame has two symmetrically arranged limiting grooves. The inner wall of the equipment frame has two arc-shaped racks fixedly connected in a centrally symmetrical structure. A motor is fixedly connected to the inner wall of the top of the equipment frame, and a drive wheel is fixedly connected to the output end of the motor.

[0010] Preferably, the adjusting ring is rotatably connected to the inner wall of the limiting groove, and an annular rack is fixedly connected to one side of the adjusting ring, the annular rack being meshed with the driving wheel for transmission.

[0011] Preferably, a threaded rod is rotatably connected to the adjusting frame, and a transmission wheel is fixedly connected to one end of the threaded rod. The transmission wheel meshes with an arc-shaped rack for transmission.

[0012] Preferably, a slider is fixedly connected to the top of the fixed sleeve, the slider is threadedly connected to the threaded rod, an adjusting rod is threadedly connected to one side of the fixed sleeve, a clamping plate is rotatably connected to the inner end of the adjusting rod, the upper and lower sides of the clamping plate are slidably engaged with the inner wall of the fixed sleeve, and a knob is fixedly connected to the outer end of the adjusting rod.

[0013] Preferably, the transmission mechanism includes a universal joint, which is rotatably connected to the base. A driven wheel is fixedly connected to one end of the universal joint, and the driven wheel meshes with a ring rack. A worm is fixedly connected to the other end of the universal joint, and the other end of the worm is rotatably connected to the inner wall of the base. A worm wheel meshes with one side of the worm and is rotatably connected to the inner wall of the base. A rotating rod is fixedly connected to the lower side of the worm wheel, and a pressing wheel is rotatably connected to the other end of the rotating rod.

[0014] Preferably, the outer wall of the air compressor plate is slidably fitted with the inner wall of the air storage chamber, a guide rod is fixedly connected to one side of the air compressor plate, the guide rod is slidably fitted through the inner wall of the air storage chamber, a contact plate is fixedly connected to the outer end of the guide rod, one side of the outer wall of the contact plate is slidably in contact with the outer wall of the extrusion wheel, a spring is fixedly connected to the other side of the contact plate, and the other end of the spring is fixedly connected to the inner wall of the base.

[0015] Preferably, a rubber sleeve is fixedly connected to the inner wall of the placement sleeve, and an air guide tube is fixedly connected through the inner wall of the bottom end of the placement sleeve. The other end of the air guide tube communicates with the inner wall of the air storage chamber. Multiple movable rods are slidably connected through a ring structure on one side of the placement sleeve. A tension spring is fixedly connected to the inner end of each movable rod, and the other end of the tension spring is fixedly connected to the inner wall of the placement sleeve. An I-shaped frame is fixedly connected between the outer ends of the multiple movable rods, and multiple ultraviolet disinfection lamps are fixedly connected to the inner end of the I-shaped frame in a ring structure.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting two adjusting rings that rotate in opposite directions, the pressure band clamped by the fixed sleeve can be tied. At the same time, under the action of the arc-shaped rack, the fixed sleeve can be moved, so that the two ends of the pressure band can be cross-tied, replacing manual tying. This improves the stability and effectiveness of the tying. Cross-tiing helps to better control blood flow, ensure that the blood vessels are fully filled, and make it easier for medical staff to locate blood vessels for blood draw. At the same time, it can make the pressure band apply pressure evenly, avoiding the situation of local overtightness or looseness that may occur with traditional manual tying, thus improving the reliability of the tying.

[0018] 2. By setting a rubber sleeve inside the placement sleeve, the air pressure plate can be moved and inflated into the placement sleeve while the pressure band is being applied. This further pressurizes the blood vessel, increases the expansion effect of the blood vessel, helps maintain the dilated state of the blood vessel, and makes the blood more full and obvious, enhancing the visibility of the elbow vein. This provides better blood drawing results and increases the blood drawing speed compared to traditional methods, thereby reducing pain for children.

[0019] 3. By installing an ultraviolet disinfection lamp inside the placement sleeve, the rubber sleeve is ensured to undergo strict disinfection before each use, reducing the risk of cross-infection and ensuring the hygiene and safety of medical operations. At the same time, by opening placement holes on the base, it is convenient to place vacuum negative pressure blood collection tubes, reducing the risk of blood collection tube breakage due to accidental placement or movement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a pediatric blood-drawing device according to the present invention;

[0021] Figure 2 This is a partial cross-sectional view of the overall structure of a pediatric blood-drawing device according to the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the base structure of a pediatric blood-drawing device according to the present invention;

[0023] Figure 4This is a partial cross-sectional schematic diagram of the equipment frame structure of a pediatric blood collection device according to the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the pediatric blood-drawing device of the present invention, including the adjusting ring;

[0025] Figure 6 This is a schematic diagram showing the structure of the fixing sleeve and other components of a pediatric blood-drawing device according to the present invention;

[0026] Figure 7 This is a schematic diagram of the transmission structure and air pressure plate structure of a pediatric blood-drawing device according to the present invention;

[0027] Figure 8 This is a partial cross-sectional schematic diagram of the placement sleeve structure of a pediatric blood-drawing device according to the present invention.

[0028] The diagram shows: 1. Base; 2. Equipment frame; 3. Adjusting ring; 4. Adjusting frame; 5. Fixing sleeve; 6. Pressure band; 7. Transmission mechanism; 8. Air pressure plate; 9. Placement sleeve; 101. Air storage chamber; 102. Placement hole; 201. Hanging rod; 202. Limiting rod; 203. Disposable blood drawing needle tubing; 204. Limiting groove; 205. Arc-shaped rack; 206. Motor; 207. Drive wheel; 301. Annular rack; 401. Threaded rod; 40 2. Transmission wheel; 501. Slider; 502. Adjusting rod; 503. Clamping plate; 504. Knob; 701. Universal joint; 702. Driven wheel; 703. Worm gear; 704. Worm wheel; 705. Rotating rod; 706. Extrusion wheel; 801. Guide rod; 802. Contact plate; 803. Spring; 901. Rubber sleeve; 902. Air duct; 903. Movable rod; 904. Tension spring; 905. I-beam frame; 906. Ultraviolet disinfection lamp. Detailed Implementation

[0029] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0030] like Figures 1-8 The pediatric blood-drawing device shown includes a base 1, an equipment frame 2 fixedly connected to the base 1, an adjusting ring 3 rotatably connected to the inner wall of the equipment frame 2 in a symmetrical structure, an adjusting frame 4 fixedly connected to the adjusting ring 3, a fixing sleeve 5 slidably fitted to the adjusting frame 4, a pressure band 6 clamped between two fixing sleeves 5, a transmission mechanism 7 rotatably connected to the inner wall of the base 1, a pressure plate 8 slidably fitted to the inner wall of the base 1, and a placement sleeve 9 fixedly connected to the base 1.

[0031] like Figure 3As shown, an air storage chamber 101 is provided on the inner wall of the bottom end of the base 1, and multiple placement holes 102 are provided on both sides of the top surface of the base 1 in a linear structure.

[0032] like Figure 4 As shown, hanging rods 201 are symmetrically and fixedly connected to both sides of the top of the equipment frame 2. Two limiting rods 202 are symmetrically arranged below the hanging rods 201, with one end of each limiting rod fixedly connected to the equipment frame 2. Multiple disposable blood-drawing needle tubing 203s are placed on the hanging rods 201. Two limiting grooves 204 are symmetrically formed on the inner wall of the equipment frame 2. Two arc-shaped racks 205 are centrally symmetrically connected to the inner wall of the equipment frame 2. A motor 206 is fixedly connected to the inner wall of the top of the equipment frame 2, and a drive wheel 207 is fixedly connected to the output end of the motor 206. The motor 206 drives the connected drive wheel 207 to rotate, which in turn drives the adjusting rings 3 connected to the annular racks 301 on both sides to rotate.

[0033] like Figure 5 As shown, the adjusting ring 3 is rotatably connected to the inner wall of the limiting groove 204, and a ring rack 301 is fixedly connected to one side of the adjusting ring 3. The ring rack 301 is meshed with the driving wheel 207 for transmission.

[0034] like Figure 5 As shown, a threaded rod 401 is rotatably connected to the adjusting frame 4. A transmission wheel 402 is fixedly connected to one end of the threaded rod 401. The transmission wheel 402 meshes with the arc-shaped rack 205 for transmission. The adjusting ring 3 will drive the two ends of the pressure belt 6 to move. Then, when the transmission wheel 402 meshes with the arc-shaped rack 205, it will drive the connected threaded rod 401 to rotate, causing the threaded rod 401 to drive the fixed sleeve 5 connected to the slider 501 to move. This causes the fixed sleeve 5 to drive the two ends of the clamped pressure belt 6 to be arranged in a cross structure. At this time, when the two ends of the pressure belt 6 move and tighten, it will be tied to the upper part of the arm.

[0035] like Figure 6 As shown, a slider 501 is fixedly connected to the top of the fixed sleeve 5. The slider 501 is threadedly connected to the threaded rod 401. An adjusting rod 502 is threadedly connected to one side of the fixed sleeve 5. A clamping plate 503 is rotatably connected to the inner end of the adjusting rod 502. The upper and lower sides of the clamping plate 503 are slidably engaged with the inner wall of the fixed sleeve 5. A knob 504 is fixedly connected to the outer end of the adjusting rod 502. The clamping plate 503 facilitates the replacement of the pressure band 6.

[0036] like Figure 7As shown, the transmission mechanism 7 includes a universal joint 701, which is rotatably connected to the base 1. A driven wheel 702 is fixedly connected to one end of the universal joint 701, and the driven wheel 702 meshes with a ring rack 301. A worm 703 is fixedly connected to the other end of the universal joint 701, and the other end of the worm 703 is rotatably connected to the inner wall of the base 1. A worm wheel 704 meshes with one side of the worm 703 and is rotatably connected to the inner wall of the base 1. A rotating rod 705 is fixedly connected to the lower side of the worm wheel 704, and a pressing wheel 706 is rotatably connected to the other end of the rotating rod 705. The ring rack 301 drives the universal joint 701 connected to the driven wheel 702 to rotate, which in turn drives the worm 703 to rotate. The worm 703 then drives the rotating rod 705 connected to the worm wheel 704 to rotate, causing the rotating rod 705 to contact and press against the contact plate 802 via the pressing wheel 706.

[0037] like Figure 7 As shown, the outer wall of the air compressor plate 8 is slidably fitted with the inner wall of the air storage chamber 101. A guide rod 801 is fixedly connected to one side of the air compressor plate 8, and the guide rod 801 is slidably fitted through the inner wall of the air storage chamber 101. A contact plate 802 is fixedly connected to the outer end of the guide rod 801. One side of the outer wall of the contact plate 802 is in slidable contact with the outer wall of the extrusion wheel 706. A spring 803 is fixedly connected to the other side of the contact plate 802, and the other end of the spring 803 is fixedly connected to the inner wall of the base 1. The spring 803 enables the air compressor plate 8 to automatically reset. The contact plate 802 can drive the air compressor plate 8 connected to the guide rod 801 to move, thereby injecting the air in the air storage chamber 101 into the placement sleeve 9 through the air guide pipe 902, so that the rubber sleeve 901 in the placement sleeve 9 inflates and presses against the front end of the arm.

[0038] like Figure 8 As shown, a rubber sleeve 901 is fixedly connected to the inner wall of the placement sleeve 9. A vent pipe 902 is fixedly connected through the inner wall of the bottom end of the placement sleeve 9, and the other end of the vent pipe 902 is connected to the inner wall of the air storage chamber 101. Multiple movable rods 903 are slidably fitted through a ring structure on one side of the placement sleeve 9. A tension spring 904 is fixedly connected to the inner end of each movable rod 903, and the other end of the tension spring 904 is fixedly connected to the inner wall of the placement sleeve 9. An I-shaped frame 905 is fixedly connected between the outer ends of the multiple movable rods 903. Multiple ultraviolet disinfection lamps 906 are fixedly connected to the inner end of the I-shaped frame 905 in a ring structure. The tension spring 904 enables the I-shaped frame 905 to automatically reset.

[0039] By setting two adjusting rings 3 that rotate in opposite directions, the pressure band 6 held by the fixing sleeve 5 can be tied. At the same time, under the action of the arc-shaped toothed rack 205, the fixing sleeve 5 can be moved, so that the two ends of the pressure band 6 can be cross-tied, replacing manual tying, thereby improving the stability and effect of tying. Cross-tiing helps to better control blood flow, ensure that the blood vessels are fully filled, and make it easier for medical staff to locate blood vessels for blood drawing. At the same time, it can make the pressure band 6 apply pressure evenly, avoiding the situation of local overtightness or looseness that may occur with traditional manual tying, thus improving the reliability of tying.

[0040] Working principle: When it is necessary to draw blood from the antecubital vein of a child, first place both ends of the compression band 6 into the fixing sleeve 5, and rotate the adjusting rod 502 connected to the knob 504 so that the adjusting rod 502 can drive the clamp 503 to move and clamp and fix both ends of the compression band 6.

[0041] Then, the arm is inserted through the equipment frame 2 into the placement sleeve 9. At this time, the hand will push open the I-shaped frame 905. Then, the motor 206 drives the connected drive wheel 207 to rotate, so that the drive wheel 207 can drive the adjusting ring 3 connected to the ring rack 301 on both sides to rotate. At this time, the adjusting ring 3 will drive the two ends of the pressure pulse belt 6 to move. Then, when the transmission wheel 402 meshes with the arc rack 205, it will drive the connected threaded rod 401 to rotate, so that the threaded rod 401 drives the fixed sleeve 5 connected to the slider 501 to move, so that the fixed sleeve 5 drives the two ends of the clamped pressure pulse belt 6 to be arranged in a cross structure. At this time, when the two ends of the pressure pulse belt 6 move and tighten, it will be tied to the upper part of the arm.

[0042] Simultaneously, when the adjusting ring 3 rotates, it drives the universal joint 701 connected to the driven wheel 702 to rotate through the ring rack 301. This causes the universal joint 701 to drive the connected worm gear 703 to rotate, which in turn drives the rotating rod 705 connected to the worm wheel 704 to rotate. The rotating rod 705 then contacts and squeezes the contact plate 802 through the compression wheel 706. This causes the contact plate 802 to move the air pressure plate 8 connected to the guide rod 801, thereby injecting the air in the air storage chamber 101 into the placement sleeve 9 through the air guide tube 902. This causes the rubber sleeve 901 inside the placement sleeve 9 to inflate and press against the front of the arm, squeezing the blood vessels at the front of the arm. This causes the blood to concentrate on the side of the compression band 6, causing the antecubital vein to expand, making it easier for medical staff to determine the location of the blood vessels. Then, the disposable blood collection needle tubing 203 is removed. After removing the protective sleeves from both ends of the disposable blood collection needle tubing 203, one end is inserted into the vacuum negative pressure blood collection tube, and then the needle at the other end is inserted into the blood vessel to draw blood.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A pediatric blood-drawing device, comprising a base (1), characterized in that: A device frame (2) is fixedly connected to the base (1). An adjusting ring (3) is rotatably connected to the inner wall of the device frame (2). An adjusting frame (4) is fixedly connected to the adjusting ring (3). A fixing sleeve (5) is slidably fitted on the adjusting frame (4). A pressure band (6) is clamped between the two fixing sleeves (5). A transmission mechanism (7) is rotatably connected to the inner wall of the base (1). A pressure plate (8) is slidably fitted to the inner wall of the base (1). A placement sleeve (9) is fixedly connected to the base (1). A device frame (2) is symmetrically fixedly connected to both sides of the top of the device frame (2). There is a hanging rod (201), and two limiting rods (202) are symmetrically arranged below the hanging rod (201). One end of the limiting rod (202) is fixedly connected to the equipment frame (2). Multiple disposable blood drawing needle tubing (203) is placed on the hanging rod (201). Two limiting grooves (204) are symmetrically arranged on the inner wall of the equipment frame (2). Two arc-shaped racks (205) are fixedly connected to the inner wall of the equipment frame (2) in a centrally symmetrical structure. A motor (206) is fixedly connected to the inner wall of the top of the equipment frame (2). A drive wheel (205) is fixedly connected to the output end of the motor (206). 7) The adjusting ring (3) is rotatably connected to the inner wall of the limiting groove (204). A ring rack (301) is fixedly connected to one side of the adjusting ring (3). The ring rack (301) is meshed with the drive wheel (207) for transmission. A threaded rod (401) is rotatably connected to the adjusting frame (4). A transmission wheel (402) is fixedly connected to one end of the threaded rod (401). The transmission wheel (402) is meshed with the arc-shaped rack (205) for transmission. The transmission mechanism (7) includes a universal joint (701). The universal joint (701) is rotatably connected to the base (1). (701) A driven wheel (702) is fixedly connected to one end of the universal joint (701). The driven wheel (702) meshes with the ring rack (301) for transmission. A worm (703) is fixedly connected to the other end of the universal joint (701). The other end of the worm (703) is rotatably connected to the inner wall of the base (1). A worm wheel (704) meshes with one side of the worm (703) for transmission. The worm wheel (704) is rotatably connected to the inner wall of the base (1). A rotating rod (705) is fixedly connected to the lower side of the worm wheel (704). A pressing wheel (706) is rotatably connected to the other end of the rotating rod (705).

2. The pediatric blood extractor of claim 1, wherein: The base (1) has an air storage chamber (101) on the inner wall at the bottom end, and the base (1) has multiple placement holes (102) on both sides of the top surface in a linear structure.

3. A pediatric blood-drawing device according to claim 1, characterized in that: The top of the fixed sleeve (5) is fixedly connected to a slider (501), the slider (501) is threadedly connected to the threaded rod (401), an adjusting rod (502) is threadedly connected through one side of the fixed sleeve (5), a clamping plate (503) is rotatably connected to the inner end of the adjusting rod (502), the upper and lower sides of the clamping plate (503) are slidably engaged with the inner wall of the fixed sleeve (5), and a knob (504) is fixedly connected to the outer end of the adjusting rod (502).

4. The pediatric blood extractor of claim 2, wherein: The outer wall of the air compressor plate (8) is slidably fitted with the inner wall of the air storage chamber (101). A guide rod (801) is fixedly connected to one side of the air compressor plate (8). The guide rod (801) is slidably fitted through the inner wall of the air storage chamber (101). A contact plate (802) is fixedly connected to the outer end of the guide rod (801). The outer wall of one side of the contact plate (802) is slidably in contact with the outer wall of the extrusion wheel (706). A spring (803) is fixedly connected to the other side of the contact plate (802). The other end of the spring (803) is fixedly connected to the inner wall of the base (1).

5. The pediatric blood extractor of claim 2, wherein: A rubber sleeve (901) is fixedly connected to the inner wall of the placement sleeve (9). A gas guide tube (902) is fixedly connected through the inner wall of the bottom end of the placement sleeve (9). The other end of the gas guide tube (902) is connected to the inner wall of the gas storage chamber (101). A plurality of movable rods (903) are slidably connected through a ring structure on one side of the placement sleeve (9). A tension spring (904) is fixedly connected to the inner end of the movable rod (903). The other end of the tension spring (904) is fixedly connected to the inner wall of the placement sleeve (9). An I-shaped frame (905) is fixedly connected between the outer ends of the plurality of movable rods (903). A plurality of ultraviolet disinfection lamps (906) are fixedly connected to the inner end of the I-shaped frame (905) in a ring structure.

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