CN109965888A - A kind of electronics blood collecting balance with automatic termination acquisition process function - Google Patents

Abstract

The invention discloses an electronic blood collection scale with the function of automatically terminating the collection process. ), the weight acquisition sensor (1-4) and the display (1-5) are all connected with the single-chip microcomputer circuit, and it is characterized in that: the scale base (1-1) is provided with a blood collection tube clamping mechanism (2), which The blood vessel clamping mechanism (2) is connected to the single-chip microcomputer; when the weight collection sensor (1-4) collects the blood weight in the blood collection bag placed in the tray (1-2) and reaches the set blood collection volume value, the The single chip microcomputer controls the blood collection tube clamping mechanism (2) to clamp the blood collection tube (M-1) of the blood collection bag. The invention can solve the technical problem that the existing electronic blood collection scale still continues to collect when the blood volume in the blood collection bag is excessive during blood collection.

Description

An electronic blood collection scale with the function of automatically terminating the collection process

technical field

The invention belongs to an electronic blood collection scale with the function of automatically terminating the collection process.

Background technique

We know that when blood flows out of the body, it normally takes 2-8 minutes to clot. But blood collected from blood donations does not coagulate in the blood collection bag, thanks to the anticoagulant in the blood collection bag.

The existing electronic blood collection scale generally includes a tray, a scale base, a display, a load cell and a swing mechanism. During blood collection, in order to prevent the collected blood from coagulating, the plastic blood collection bag will contain a certain amount of anticoagulant. Place the blood collection bag on the tray of the electronic blood collection scale. During the blood collection process, the blood flows into the plastic blood collection bag. When donating blood to achieve the purpose of not coagulating blood, it is necessary to constantly shake the blood collection bag while it is placed on an electronic scale. However, the existing electronic blood collection scales still have the following deficiencies, which are analyzed as follows:

First, when the blood volume in the blood collection bag in the tray of the electronic blood collection scale reaches the set blood collection volume value, the staff needs to find and close the blood collection tube in time.

Second, the existing electronic blood collection scales collect blood by one person and one scale. When there are many people collecting blood, a large number of blood collection scales need to be configured, which is costly and inconvenient to operate.

SUMMARY OF THE INVENTION

In view of one or more of the above-mentioned defects in the prior art, the present invention provides an electronic blood collection scale with the function of automatically terminating the collection process.

In order to achieve the above purpose, the present invention provides an electronic blood collection scale with a function of automatically terminating the collection process, including an electronic blood collection scale body (1), the electronic blood collection scale body (1) having a scale base (1-1), a tray ( 1-2), a swing mechanism (1-3), a weight acquisition sensor (1-4) and a display (1-5), the tray (1-2) is arranged on the scale base through the swing mechanism (1-3) (1-1), and the swing mechanism (1-3), the weight acquisition sensor (1-4) and the display (1-5) are all connected to the single-chip microcomputer circuit, and it is characterized in that: the scale base (1-1) ) is provided with a blood collection tube clamping mechanism (2), the blood collection tube clamping mechanism (2) is connected with the single-chip microcomputer; when the weight collection sensor (1-4) collects the When the weight of blood in the blood collection bag reaches the set blood collection volume value, the single-chip microcomputer will control the blood collection tube clamping mechanism (2) to clamp the blood collection tube (M-1) of the blood collection bag.

With the above solution, during operation, since the weight collection sensor (1-4) is connected to the single-chip microcomputer circuit, the weight collection sensor (1-4) is used to collect the blood in the blood collection bag in the tray (1-2). The weight signal can be generated and sent to the single-chip microcomputer, and then compared with the set blood collection value, when the weight collection sensor (1-4) collects the blood collection in the blood collection bag placed in the tray (1-2). When the blood weight reaches the set blood collection volume value, the single-chip microcomputer will control the blood collection tube clamping mechanism (2) to clamp the blood collection tube (M-1) of the blood collection bag, so the blood volume collected in the blood collection bag reaches When the blood collection volume value is set, the blood collection tube clamping mechanism (2) automatically clamps the blood collection tube (M-1) of the blood collection bag, stops blood collection and automatically terminates the collection process. Therefore, when blood is collected, the staff does not need to be manually turned off, which can solve the technical problem that the existing electronic blood collection scale still continues to collect when the blood volume in the blood collection bag is excessive during blood collection.

As a preferred solution, the blood collection tube clamping mechanism (2) includes a bracket (21), a movable splint (21-1), a fixed splint (21-2), a first permanent magnet (21-3), a first The electromagnet (21-4) and the guide rod (21-5); the lower end of the bracket (21) is fixed on the scale base (1-1), and the fixed splint (21-2) is fixedly arranged on the bracket (21) ) upper end; the movable splint (21-1) and the fixed splint (21-2) are arranged at horizontal intervals; one end of the guide rod (21-5) is fixedly connected with the movable splint (21-1), and the guide rod ( 21-5) The other end passes through the fixed splint (21-2) horizontally and is fixedly connected with the first permanent magnet (21-3), and the first electromagnet (21-4) is connected with the first permanent magnet (21-4). The magnets (21-3) are arranged at horizontal intervals; the first permanent magnets (21-3) are fixedly arranged on the support (21), and the first electromagnets (21-4) are connected to the single-chip microcomputer circuit.

During blood collection, when the first electromagnet (21-4) is powered off, the blood collection tube (M-1) is placed between the movable splint (21-1) and the fixed splint (21-2). The blood collection tube (M-1) is in a normal shape and can collect blood normally;

When the weight collection sensor (1-4) collects the blood weight in the blood collection bag placed in the tray (1-2) and reaches the set blood collection volume value, the single-chip microcomputer will control the first electromagnet ( 21-4) Power on and work, and the first electromagnet (21-4) attracts the first permanent magnet (21-3), so that the first permanent magnet (21-3) faces the first electromagnet (21-3). 4) Approaching displacement, at the same time, the movable splint (21-1) moves close to the fixed splint (21-2), thereby realizing the clamping of the blood collection tube (M-1) located between the two, and the blood collection bag stops blood collection The collection process is automatically terminated.

Further, the blood collection tube clamping mechanism (2) further comprises a spring (21-6), the spring (21-6) is sleeved on the guide rod (21-5), and the spring (21-6) The two ends are respectively abutted or fixed with the movable splint (21-1) and the fixed splint (21-2). When the first electromagnet (21-4) is powered off, the spring (21-6) will automatically extend to release the elastic force, so that the movable splint (21-1) can be reset and connected with the fixed splint (21-2) Keep a certain distance for the blood collection tube (M-1) to be placed in the normal shape. Therefore, the automatic reset can be realized and the next blood collection work can be repeated, which is convenient to use and saves time and effort.

Further, the blood collection tube clamping mechanism (2) further comprises a position sensor (21-7) and an alarm (21-8), and the position sensor (21-7) and the alarm (21-8) are connected with The single-chip microcomputer circuit is connected; when the blood collection tube (M-1) of the blood collection bag is clamped by the movable splint (21-1), the in-position sensor (21-7) can detect the clamping signal and send the clamping signal to the The single-chip microcomputer controls the alarm device (21-8) to give an alarm. When the blood collection tube (M-1) is closed and blood collection is stopped, the in-position sensor (21-7) can detect the clamping signal and send the clamping signal to the single-chip microcomputer, which will control the alarm (21-7). 21-8) Alarm, which can prompt the staff or the blood sampler in time.

As a second preferred solution, the blood collection tube clamping mechanism (2) includes a standpipe (22-1), a top plate (22-2), a second permanent magnet column (22-3) and a second electromagnet (22). -4); the lower end of the stand pipe (22-1) is fixed on the scale base (1-1), the top plate (22-2) is fixed above the stand pipe (22-1), the top plate ( 22-2) There is a notch (U) for horizontal insertion of blood collection tubes (M-1) between the lower end face and the upper nozzle of the standpipe (22-1); the second permanent magnet column (22-3) ) and the second electromagnet (22-4) are both located in the standpipe (22-1), and the second permanent magnet column (22-3) is located above the second electromagnet (22-4); The second permanent magnet column (22-3) is in clearance fit with the stand pipe (22-1), and the second electromagnet (22-4) is fixed in the stand pipe (22-1); The second electromagnet (22-4) is connected with the microcontroller circuit.

During blood collection, when the second electromagnet (22-4) is powered off, place the blood collection tube (M-1) on the lower end face of the top plate (22-2) and the upper nozzle of the standpipe (22-1). In the notch (U) between the tubes, at this time the blood collection tube (M-1) is in a normal shape and can be used for normal blood collection;

When the weight collection sensor (1-4) collects the blood weight in the blood collection bag placed in the tray (1-2) and reaches the set blood collection volume value, the single-chip microcomputer will control the second electromagnet ( 22-4) Power on and work, and the second electromagnet (22-4) and the second permanent magnet column (22-3) repel each other, so that the second permanent magnet column (22-3) is facing up and close to the top plate (22) -2) Displacement, the notch (U) becomes smaller, thereby realizing the clamping of the blood collection tube (M-1) in the notch (U), the blood collection bag stops blood collection and automatically terminates the collection process.

Further, the upper end surface of the second permanent magnet column (22-3) is provided with an arc-shaped positioning groove (22-31), and the lower end surface of the top plate (22-2) is provided with an arc-shaped protrusion (22-21); The arc-shaped protrusions (22-21) are matched with the arc-shaped positioning grooves (22-31). During blood collection, the blood collection tube (M-1) is positioned in the arc-shaped positioning groove (22-31), which can prevent it from slipping out of the groove (U) and affecting the clamping.

Further, the outer wall of the second permanent magnet column (22-3) is provided with a reset lever (22-32) extending radially out; ), the outer end of the reset lever (22-32) passes through the bar-shaped hole (22-11) and protrudes outward. When the second permanent magnet column (22-3) clamps the blood collection tube (M-1) upward, the reset lever (22-32) will move upwards synchronously along the bar-shaped perforation (22-11). The two permanent magnet columns (22-3) are in clearance fit with the standpipe (22-1). Under normal circumstances, when the second electromagnet (22-4) is powered off, the second permanent magnet column (22-1) 3) Automatic downward reset due to gravity. However, in order to prevent that the second permanent magnet column (22-3) may not be reset or the reset is not in place, the second permanent magnet column (22) can be realized by lowering the reset lever (22-32). -3) Downstream reset. At the same time, since the reset lever (22-32) can only move up and down in the bar-shaped perforation (22-11), the reset lever (22-32) can prevent the second permanent magnet column (22-11). 3) Rotate when moving up and down to ensure that the arc-shaped positioning groove (22-31) and the arc-shaped protrusion (22-21) correspond in position and direction, thereby ensuring that they cooperate with each other to clamp the blood collection tube (M-1) Work.

Preferably, the rocking mechanism (1-3) comprises a motor (1-31), a rotating shaft (1-32), two support plates (1-33), a tray support (1-34) and a cylindrical cam (1) -35); the two support plates (1-33) are fixed in the scale base (1-1) and are distributed at intervals along the horizontal direction; the rotating shaft (1-32) is arranged horizontally, and the rotating shaft (1- 32) Both ends are respectively rotatably connected with the two support plates (1-33); the motor (1-31) is connected with the rotating shaft (1-32) and used to drive the rotating shaft (1-32) to rotate ; the tray support (1-34) is slidably connected to the two support plates (1-33) through two flat rods (1-36) respectively; the cylindrical cam (1-35) is fixedly sleeved on the On the rotating shaft (1-32), the cam ring groove (1-351) of the cylindrical cam (1-35) is connected with the driven push rod (1-36), and the driven push rod (1-36) is fixed On the tray support (1-34), when the cylindrical cam (1-35) rotates, it will be converted into a linear reciprocating motion of the tray support (1-34); the tray (1-2) is located at Above the tray support (1-34), the weight acquisition sensor (1-4) is fixed on the tray support (1-34), and the sensing end of the weight acquisition sensor (1-4) is connected to the The bottom surface of the tray (1-2) is connected. When the blood collection bag starts to swing, the motor (1-31) drives the rotating shaft (1-32) to rotate, and the two ends of the rotating shaft (1-32) are supported and rotated by two supporting plates (1-33) respectively, so as to ensure the rotating shaft (1-32). (1-32) Reliability and stability of horizontal rotation, the shaft (1-32) drives the cylindrical cam (1-35) to rotate at the same time, and the cam ring groove (1-35) on the outer wall of the cylindrical cam (1-35) 1-351) Push the driven push rod (1-36) fixed on the tray support (1-34) to move, and when the cylindrical cam (1-35) rotates, it will be converted into a tray support (1) -34) linear reciprocating movement, so that the tray support (1-34) reciprocates horizontally due to the horizontal guidance of the two flat rods (1-36), the tray support (1-34) supports The tray (1-2) reciprocates horizontally at the same time, so that the blood collection bag in the tray (1-2) can swing horizontally from side to side (or back and forth).

Further, the blood collection tube clamping mechanism (2) is arranged close to the tray (1-2); the tray (1-2), the weight collection sensor (1-4) and the The blood collection tube clamping mechanism (2) forms a collection work unit and has a plurality of collection work units. The plurality of collection work units work independently, so blood collection can be realized in the way of two people and one scale. At the same time, when the swing mechanism (1-3) starts to work, each tray (1-2) swings at the same time and is collected by each weight collection sensor (1-2). 1-4) The weight is weighed, so it can ensure that each collection work unit works independently, which can reduce the number of blood collection scales, reduce the high cost, and make blood collection more operation.

Further, the number of the displays (1-5) is the same as that of the collection work units, and each of the displays (1-5) is used to display the plurality of collection work units respectively. In this way, each acquisition work unit can be displayed independently or operated by touch screen. Preferably, the display (1-5) adopts a touch screen.

Beneficial effects of the present invention:

First, in the present invention, when the blood collection volume in the blood collection bag reaches the set blood collection volume value during blood collection, the blood collection tube clamping mechanism 2 automatically clamps the blood collection tube of the blood collection bag, stops blood collection and automatically terminates the collection process. Therefore, when blood is collected, it is not necessary for the staff to manually close it, which can solve the technical problem that the existing electronic blood collection scale still continues to collect when the blood volume in the blood collection bag is excessive during blood collection;

Second, the motor of the present invention is controlled by a single-chip microcomputer, so when it reaches 10ml (or other set values) before the set blood collection volume value, it stops swinging and enters the precise weighing state to ensure the accuracy of the blood collection volume;

Thirdly, the blood collection tube clamping mechanism of the present invention adopts the single chip microcomputer to control the electrification of the electromagnet, so as to realize the control of the opening and clamping states of the blood collection tube, and realize automatic control. Fast, low cost, can ensure long-term stable and reliable performance.

Fourth, the present invention can set up a plurality of collecting work units to work independently, so it can realize blood collection in a way of multiple people and one scale. At the same time, when the swing mechanism starts to work, each tray swings and is weighed and weighed by each weight acquisition sensor. Therefore, each collection work unit can be guaranteed to work independently, the number of blood collection scales can be reduced, the high cost can be reduced, and the blood collection operation is more convenient.

Fifth, the present invention can set the blood collection tube clamping mechanism to clamp the blood collection tube of the blood collection bag after the set blood collection volume value is reached, stop blood collection, and at the same time, the corresponding alarm device will issue an alarm prompt of blood collection completion, and the blood bag should be removed in time at this time. .

Description of drawings

FIG. 1 is a front view (when swinging to the right) of the first embodiment of the present invention.

FIG. 2 is a front view (when swinging to the left) of the first embodiment of the present invention.

FIG. 3 is a perspective view of the first embodiment of the present invention.

FIG. 4 is a perspective view of the first embodiment of the present invention (when viewed from another direction).

5 is a working state diagram of the blood collection tube clamping mechanism in the first embodiment of the present invention before the blood collection tube is clamped.

6 is a working state diagram of the blood collection tube clamping mechanism in the first embodiment of the present invention when the blood collection tube is clamped.

FIG. 7 is a schematic circuit diagram of Embodiment 1 of the present invention.

8 is a working state diagram of the blood collection tube clamping mechanism in the second embodiment of the present invention before the blood collection tube is clamped.

9 is a working state diagram of the blood collection tube clamping mechanism in the second embodiment of the present invention when the blood collection tube is clamped.

FIG. 10 is a schematic circuit diagram of the second embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

Embodiment 1: Referring to Figures 1-7, an electronic blood collection scale with the function of automatically terminating the collection process includes an electronic blood collection scale body 1, and the electronic blood collection scale body 1 has a scale base 1-1, a tray 1-2, and a swing mechanism. 1-3. A weight acquisition sensor 1-4 and a display 1-5, the tray 1-2 is arranged on the scale base 1-1 through a rocking mechanism 1-3, and the rocking mechanism 1-3, the weight acquisition sensor 1 -4 and displays 1-5 are all connected with the microcontroller circuit.

Referring to FIG. 1-2, the scale base 1-1 is provided with a blood collection tube clamping mechanism 2, and the blood collection tube clamping mechanism 2 is connected to the single chip computer; when the weight collection sensor 1-4 collects the tray 1-4 When the weight of the blood in the blood collection bag placed in 2 reaches the set blood collection volume value, the microcontroller will control the blood collection tube clamping mechanism 2 to clamp the blood collection tube M-1 of the blood collection bag.

Referring to Fig. 1-7, since the weight acquisition sensor 1-4 is connected with a single chip (such as a model AT89S52 single chip) circuit, the weight acquisition sensor 1-4 is used to collect the weight signal of the blood in the blood collection bag in the tray 1-2 And the weight signal can be sent to the single-chip microcomputer, and then compared with the set blood collection value, when the weight collection sensor 1-4 collects the blood weight in the blood collection bag placed in the tray 1-2 reaches the set blood collection value. When the value of the blood collection tube is reached, the single-chip microcomputer will control the blood collection tube clamping mechanism 2 to clamp the blood collection tube M-1 of the blood collection bag, so when the blood volume collected in the blood collection bag reaches the set blood collection volume value, the blood collection tube will The clamping mechanism 2 automatically clamps the blood collection tube M-1 of the blood collection bag, stops blood collection and automatically terminates the collection process. Therefore, when blood is collected, the staff does not need to be manually turned off, which can solve the technical problem that the existing electronic blood collection scale still continues to collect when the blood volume in the blood collection bag is excessive during blood collection.

3-4, specifically, the scale base 1-1 is provided with a power switch, a rocking button, a tare button, and a setting button (for setting the blood collection volume, such as 100ml, 200ml, 300ml, 400ml) . Since it is an existing design, it will not be described in detail.

5-6, in this embodiment: the blood collection tube clamping mechanism 2 includes a standpipe 22-1, a top plate 22-2, a second permanent magnet column 22-3 and a second electromagnet 22-4; The lower end of the stand pipe 22-1 is fixed on the scale base 1-1, the top plate 22-2 is fixed above the stand pipe 22-1, and the lower end surface of the top plate 22-2 is on the stand pipe 22-1. Between the nozzles, there is a slot U for the blood collection tube M-1 to be placed horizontally; the second permanent magnet column 22-3 and the second electromagnet 22-4 are both located in the vertical pipe 22-1, and the second permanent magnet column 22-3 and the second electromagnet 22-4 Two permanent magnet columns 22-3 are located above the second electromagnet 22-4; the second permanent magnet column 22-3 is in clearance fit with the riser 22-1, and the second electromagnet 22-4 is fixed on the The second electromagnet 22-4 is connected to the single-chip microcomputer circuit.

Referring to FIG. 7 , specifically, the electromagnetic coil of the second electromagnet 22-4 is connected to the power supply through the third normally-open relay K3. The single-chip microcomputer is connected with the third normally open relay K3 and controls the third normally open relay K3 to close or open.

Referring to FIG. 5 , during blood collection, when the second electromagnet 22-4 is powered off (ie, the third normally open relay K3 is disconnected), place the blood collection tube M-1 on the lower end face of the top plate 22-2 and the vertical In the notch U between the nozzles on the tube 22-1, at this time the blood collection tube M-1 is in a normal shape state and can collect blood normally;

Referring to FIG. 6 , when the weight of the blood collected by the weight collection sensor 1-4 in the blood collection bag placed in the tray 1-2 reaches the set blood collection volume value, the single-chip microcomputer will control the second electromagnet 22 -4 Power-on operation (ie, the third normally-open relay K3 is closed), and the second electromagnet 22-4 and the second permanent magnet column 22-3 repel each other, so that the second permanent magnet column 22-3 faces upward and is close to the top plate 22-2 is displaced, the notch U becomes smaller, and the blood collection tube M-1 in the notch U is clamped, and the blood collection bag stops blood collection and automatically terminates the collection process.

When the second electromagnet 22-4 and the second permanent magnet column 22-3 repel each other, the opposite ends of the second electromagnet 22-4 and the second permanent magnet column 22-3 have the same magnetic pole (at the same time, the N pole or, At the same time, it is S pole).

5-6, further, the upper end surface of the second permanent magnet column 22-3 is provided with an arc-shaped positioning groove 22-31, and the lower end surface of the top plate 22-2 has an arc-shaped protrusion 22-21; the The arc-shaped protrusions 22-21 are matched with the arc-shaped positioning grooves 22-31. During blood collection, the blood collection tube M-1 is positioned in the arc-shaped positioning grooves 22-31, which can prevent it from slipping out of the groove U and affecting the clamping.

5-6, further, the outer wall of the second permanent magnet column 22-3 is provided with a reset lever 22-32 extending radially outward; The outer end of the reset lever 22-32 passes through the bar-shaped hole 22-11 and protrudes outward. When the second permanent magnet column 22-3 moves upward to clamp the blood collection tube M-1, the reset lever 22-32 will move upward synchronously along the bar-shaped perforation 22-11, so the second permanent magnet column 22-3 and The standpipe 22-1 is in clearance fit. Under normal circumstances, when the second electromagnet 22-4 is powered off, the second permanent magnet column 22-3 automatically resets downward due to the action of gravity. However, in order to prevent that the second permanent magnet column 22-3 may not be reset or reset in place, the second permanent magnet column 22-3 can be reset downward by pulling down the reset lever 22-32. At the same time, since the reset lever 22-32 can only move up and down in the bar-shaped hole 22-11, the reset lever 22-32 can prevent the second permanent magnet column 22-3 from rotating when it is displaced up and down. The arc-shaped positioning groove 22-31 and the arc-shaped protrusion 22-21 can be ensured to correspond in position and direction, thereby ensuring that they cooperate with each other to clamp the blood collection tube M-1.

1-2, in this embodiment, the rocking mechanism 1-3 includes a motor 1-31, a rotating shaft 1-32, two support plates 1-33, a tray support 1-34 and a cylindrical cam 1-35.

1-2, the two support plates 1-33 are fixed in the scale base 1-1 and are distributed at intervals along the horizontal direction; the rotating shaft 1-32 is arranged horizontally, and the two ends of the rotating shaft 1-32 are respectively connected with The two supporting plates 1-33 are rotatably connected; the motor 1-31 is connected with the rotating shaft 1-32 and is used to drive the rotating shaft 1-32 to rotate; the tray support 1-34 is connected by two flat rods 1-36 are slidably connected with the two supporting plates 1-33 respectively; the cylindrical cam 1-35 is fixedly sleeved on the rotating shaft 1-32, and the cam ring groove 1-351 of the cylindrical cam 1-35 is The driven push rod 1-36 is matched and connected, and the driven push rod 1-36 is fixed on the tray support 1-34. When the cylindrical cam 1-35 rotates, it will be converted into a straight line of the tray support 1-34. Reciprocating motion; the tray 1-2 is located above the tray support 1-34, the weight collection sensor 1-4 is fixed on the tray support 1-34, and the sensing end of the weight collection sensor 1-4 is connected to the The bottom surfaces of the trays 1-2 are connected. When the blood collection bag starts to swing, the motor 1-31 drives the rotating shaft 1-32 to rotate, and the two ends of the rotating shaft 1-32 are supported and rotated by two supporting plates 1-33 respectively, so as to ensure the reliability of the horizontal rotation of the rotating shaft 1-32 and stability, the rotating shaft 1-32 drives the cylindrical cam 1-35 to rotate at the same time, and the cam ring groove 1-351 on the outer wall of the cylindrical cam 1-35 pushes the fixed follower on the tray support 1-34 The push rod 1-36 moves, and when the cylindrical cam 1-35 rotates, it will be converted into a linear reciprocating motion of the tray support 1-34, so the tray support 1-34 is due to the two flat rods 1- 36 is guided horizontally and reciprocates horizontally, the tray support 1-34 supports the tray 1-2 and reciprocates horizontally at the same time, so that the blood collection bag in the tray 1-2 can swing horizontally from side to side or back and forth.

1-2, specifically, the cam ring groove 1-351 is arranged along the outer wall of the cylindrical cam 1-35 and is substantially S-shaped (the ends are connected at the end).

Referring to FIG. 7 , the motors 1-31 are connected to the power supply circuit through a fourth relay K4, and the fourth relay K4 is connected to the single-chip microcomputer. It can be set that when the first 10ml of the set blood collection volume is reached, the single-chip microcomputer controls the fourth relay to disconnect, and the motor 1-31 stops swinging and enters the precise weighing state.

Referring to Fig. 1-2, further, the blood collection tube clamping mechanism 2 is arranged close to the tray 1-2; the tray 1-2, the weight collection sensor 1-4 and the blood collection tube are arranged corresponding to each other The clamping mechanism 2 forms one collection work unit and has 2 collection work units. The two collection work units work independently, so blood collection can be realized in the way of two people and one scale. At the same time, when the swing mechanism 1-3 starts to work, each tray 1-2 swings at the same time and is weighed by the weight collection sensors 1-4 respectively. Therefore, it can ensure that each collection work unit works independently, which can reduce the number of blood collection scales, reduce the high cost, and make blood collection more operation.

Referring to FIG. 7 , further, the number of the displays 1-5 is the same as that of the collection work units, both of which are two, and each of the displays 1-5 is used to display the two collection work units respectively. In this way, each acquisition work unit can be displayed independently or operated by touch screen. Preferably, the displays 1-5 use a touch screen (the blood sampling volume value can be set by touching the keyboard input).

Referring to FIG. 7 , an input keyboard can also be provided separately. The keyboard is connected with the microcontroller.

The working steps of the present invention can be as follows:

1. Turn on the power switch, the system will enter the weighing state after zero adjustment;

2. Place the blood collection bag in the tray 1-2, and place the blood collection tube M-1 in the notch U of the blood collection tube clamping mechanism 2;

3. Press the "Tare/Correction" button to peel, and set the blood collection value, and make preparations before blood collection;

4. Enter the working state of blood collection after puncture;

5. Stop swinging and enter the precise weighing state when it reaches 10ml before the set blood collection value;

6. After reaching the set blood collection volume value, the blood collection tube clamping mechanism 2 clamps the blood collection tube M-1 of the blood collection bag, and stops blood collection;

7. After the blood collection work is completed, the power switch needs to be turned off and the power supply is cut off.

Embodiment 2: This embodiment is basically the same as Embodiment 1, except that the specific structure adopted by the blood collection tube clamping mechanism 2 is different.

8-10, in this embodiment: the blood collection tube clamping mechanism 2 includes a bracket 21, a movable splint 21-1, a fixed splint 21-2, a first permanent magnet 21-3, and a first electromagnet 21- 4 and guide rod 21-5; the lower end of the bracket 21 is fixed on the scale base 1-1, and the fixed splint 21-2 is fixed on the upper end of the bracket 21; the movable splint 21-1 and the fixed splint 21-2 are horizontal The left end of the guide rod 21-5 is fixedly connected with the movable splint 21-1, and the right end of the guide rod 21-5 passes through the fixed splint 21-2 horizontally and is connected with the first permanent magnet 21-3. Fixed connection, the first electromagnet 21-4 and the first permanent magnet 21-3 are horizontally spaced left and right; the first permanent magnet 21-3 is fixed on the bracket 21, and the first electromagnet 21 -4 is connected with the microcontroller circuit.

Referring to FIG. 8 , specifically, the electromagnetic coil of the first electromagnet 21-4 is connected to the power supply through the first normally open relay K1. The single-chip microcomputer is connected to the first normally open relay K1 and controls the first normally open relay to close or open.

During blood collection, see FIG. 8 , when the first electromagnet 21-4 is powered off (ie, the first normally open relay K1 is disconnected), place the blood collection tube M-1 on the movable splint 21-1 and the fixed splint 21- 2, at this time, the blood collection tube M-1 is in a normal shape and can collect blood normally;

Referring to FIG. 9, when the weight of the blood collected by the weight collection sensor 1-4 in the blood collection bag placed in the tray 1-2 reaches the set blood collection volume value, referring to FIG. 6, the single-chip microcomputer will control the An electromagnet 21-4 is energized to work (ie, the first normally open relay is turned off), and the first electromagnet 21-4 attracts the first permanent magnet 21-3, so that the first permanent magnet 21-3 faces the first permanent magnet 21-3. The electromagnet 21-4 approaches and displaces, and at the same time, the movable splint 21-1 approaches and displaces toward the fixed splint 21-2, thereby realizing the clamping of the blood collection tube M-1 located between the two, and the blood collection bag stops blood collection and automatically terminates collection process.

Referring to FIG. 9, when the first electromagnet 21-4 and the first permanent magnet 21-3 attract each other, the opposite ends of the first electromagnet 21-4 and the first permanent magnet 21-3 have opposite magnetic poles (when one of them is N pole and the other S pole).

In addition, referring to FIGS. 8-9, the blood collection tube clamping mechanism 2 further includes a spring 21-6, the spring 21-6 is sleeved on the guide rod 21-5, and the two ends of the spring 21-6 are respectively connected to the The movable splint 21-1 and the fixed splint 21-2 are abutted or fixed. When the first electromagnet 21-4 is powered off, the spring 21-6 will automatically extend to release the elastic force, so that the movable splint 21-1 can be reset and keep a certain distance from the fixed splint 21-2 for blood collection tubes The M-1 is placed in normal shape. Therefore, the automatic reset can be realized and the next blood collection work can be repeated, which is convenient to use and saves time and effort.

Further, referring to FIGS. 8-9 , the blood collection tube clamping mechanism 2 further includes a position sensor 21-7 and an alarm 21-8, and the position sensor 21-7 and the alarm 21-8 are connected to the single-chip circuit; When the blood collection tube M-1 of the blood collection bag is clamped by the movable splint 21-1, the in-position sensor 21-7 can detect the clamping signal and send the clamping signal to the single-chip microcomputer, and the single-chip microcomputer will control the alarm device 21-8 alarm.

Referring to FIG. 7, specifically, the alarm device 21-8 is connected to the power supply through the second normally open relay K21 (or K22). The single-chip microcomputer is connected with the second normally open relay and controls the second normally open relay to close or open.

Referring to FIG. 10, when the blood collection tube M-1 is closed and blood collection is stopped, the position sensor 21-7 can detect the clamping signal and send the clamping signal to the single-chip microcomputer, and the single-chip microcomputer will control the alarm device 21. -8 alarm (that is, the second normally open relay is closed), which can prompt the staff or the blood sampler in time.

Specifically, the position sensor 21-7 can be a photoelectric switch or a proximity switch. In this embodiment, the in-position sensor 21-7 adopts an in-position position signal for detecting the rightward displacement of the first permanent magnet 21-3.

The working steps of the present invention can be as follows:

1. Turn on the power switch, the system will enter the weighing state after zero adjustment;

2. Place the blood collection bag in the tray 1-2, and place the blood collection tube M-1 between the movable splint 21-1 and the fixed splint 21-2;

3. Press the "Tare/Correction" button to peel, and set the blood collection value, and make preparations before blood collection;

4. Enter the working state of blood collection after puncture;

5. Stop swinging and enter the precise weighing state when it reaches 10ml before the set blood collection value;

6. When the set blood collection volume is reached, the blood collection tube clamping mechanism 2 clamps the blood collection tube M-1 of the blood collection bag to stop blood collection. At the same time, the corresponding alarm device 21-8 will issue an alarm prompt of blood collection completion. blood bag;

7. After the blood collection work is completed, the power switch needs to be turned off and the power supply is cut off.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims (10)

1. An electronic blood collection scale with a function of automatically terminating a collection process, comprising an electronic blood collection scale body (1), the electronic blood collection scale body (1) having a scale base (1-1), a tray (1-2), a swing mechanism (1-3), a weight acquisition sensor (1-4) and a display (1-5), the tray (1-2) is arranged on the scale base (1-1) through a rocking mechanism (1-3), And the rocking mechanism (1-3), the weight acquisition sensor (1-4) and the display (1-5) are all connected with the single chip circuit, and are characterized in that: The scale base (1-1) is provided with a blood collection tube clamping mechanism (2), and the blood collection tube clamping mechanism (2) is connected with the single-chip microcomputer; When the weight collection sensor (1-4) collects the blood weight in the blood collection bag placed in the tray (1-2) and reaches the set blood collection volume value, the single-chip microcomputer will control the blood collection tube clamping mechanism (2) The blood collection tube (M-1) of the blood collection bag is clamped. 2. The electronic blood collection scale with the function of automatically terminating the collection process according to claim 1, wherein the blood collection tube clamping mechanism (2) comprises a bracket (21), a movable splint (21-1), a fixed splint (21-2), a first permanent magnet (21-3), a first electromagnet (21-4) and a guide rod (21-5); The lower end of the bracket (21) is fixed on the scale base (1-1), and the fixing splint (21-2) is fixedly arranged on the upper end of the bracket (21); The movable splint (21-1) and the fixed splint (21-2) are arranged at horizontal intervals; One end of the guide rod (21-5) is fixedly connected with the movable splint (21-1), and the other end of the guide rod (21-5) passes through the fixed splint (21-2) horizontally and is connected to the first A permanent magnet (21-3) is fixedly connected, and the first electromagnet (21-4) and the first permanent magnet (21-3) are arranged horizontally spaced apart; The first permanent magnet (21-3) is fixedly arranged on the support (21), and the first electromagnet (21-4) is connected with the single-chip microcomputer circuit. 3. The electronic blood collection scale with the function of automatically terminating the collection process according to claim 2, characterized in that: the blood collection tube clamping mechanism (2) further comprises a spring (21-6), and the spring (21) -6) Set on the guide rod (21-5), the two ends of the spring (21-6) are respectively abutted or fixed with the movable splint (21-1) and the fixed splint (21-2). 4. The electronic blood collection scale with the function of automatically terminating the collection process according to claim 2 or 3, characterized in that: the blood collection tube clamping mechanism (2) further comprises a position sensor (21-7) and an alarm (21-8), and the in-position sensor (21-7) and the alarm device (21-8) are connected with the single-chip microcomputer circuit; When the blood collection tube (M-1) of the blood collection bag is clamped by the movable splint (21-1), the in-position sensor (21-7) can detect the clamping signal and send the clamping signal to the single-chip microcomputer, and the single-chip microcomputer The alarm (21-8) will be controlled to alarm. 5. The electronic blood collection scale with the function of automatically terminating the collection process according to claim 1, wherein the blood collection tube clamping mechanism (2) comprises a riser (22-1), a top plate (22-2) ), the second permanent magnet column (22-3) and the second electromagnet (22-4); The lower end of the stand pipe (22-1) is fixed on the scale base (1-1), the top plate (22-2) is fixed above the stand pipe (22-1), and the top plate (22-2) There is a notch (U) for horizontal insertion of the blood collection tube (M-1) between the lower end face and the upper nozzle of the standpipe (22-1); The second permanent magnet column (22-3) and the second electromagnet (22-4) are both located in the standpipe (22-1), and the second permanent magnet column (22-3) is located in the Above the second electromagnet (22-4); The second permanent magnet column (22-3) is in clearance fit with the stand pipe (22-1), and the second electromagnet (22-4) is fixed in the stand pipe (22-1); The second electromagnet (22-4) is connected with the single chip circuit. 6. The electronic blood collection scale with the function of automatically terminating the collection process according to claim 5, wherein the upper end surface of the second permanent magnet column (22-3) is provided with an arc-shaped positioning groove (22-31). ), the lower end surface of the top plate (22-2) has an arc-shaped protrusion (22-21); the arc-shaped protrusion (22-21) is matched with the arc-shaped positioning groove (22-31). 7. The electronic blood collection scale with the function of automatically terminating the collection process according to claim 5 or 6, characterized in that: the outer wall of the second permanent magnet column (22-3) is radially extended with a reset dial rod(22-32); The riser (22-1) is provided with a bar-shaped perforation (22-11), and the outer end of the reset lever (22-32) passes through the bar-shaped perforation (22-11) and protrudes outward. 8. The electronic blood sampling scale with the function of automatically terminating the collection process according to any one of claims 1-7, characterized in that: the rocking mechanism (1-3) comprises a motor (1-31), a rotating shaft (1-32), two support plates (1-33), tray support (1-34) and cylindrical cam (1-35); The two support plates (1-33) are fixed in the scale base (1-1) and are distributed at intervals along the horizontal direction; The rotating shaft (1-32) is arranged horizontally, and the two ends of the rotating shaft (1-32) are respectively rotatably connected with the two support plates (1-33); The motor (1-31) is connected with the rotating shaft (1-32) and used to drive the rotating shaft (1-32) to rotate; The tray supports (1-34) are respectively slidably connected with the two support plates (1-33) through two flat rods (1-36); The cylindrical cam (1-35) is fixedly sleeved on the rotating shaft (1-32), and the cam ring groove (1-351) of the cylindrical cam (1-35) is matched with the driven push rod (1-36) connected, the driven push rod (1-36) is fixed on the tray support (1-34), and when the cylindrical cam (1-35) rotates, it will be converted into the tray support (1-34) Linear reciprocating motion; The tray (1-2) is located above the tray support (1-34), the weight acquisition sensor (1-4) is fixed on the tray support (1-34), and the weight acquisition sensor ( 1-4) The sensing end is connected to the bottom surface of the tray (1-2). 9. The electronic blood collection scale with the function of automatically terminating the collection process according to claim 8, characterized in that: the blood collection tube clamping mechanism (2) is arranged close to the tray (1-2); The tray (1-2), the weight collection sensor (1-4) and the blood collection tube clamping mechanism (2) form a collection work unit and have a plurality of collection work units. 10. The electronic blood collection scale with the function of automatically terminating the collection process according to claim 9, characterized in that: the number of the displays (1-5) is the same as that of the collection work unit, and each of the displays (1-5) For each of the multiple collection work units to be displayed separately.