CN201926581U - Mixing device of blood cell analyzer - Google Patents

Abstract

The utility model discloses a mixing device of a blood cell analyzer, which is mainly composed of a mixing mechanism and a lifting mechanism, wherein the mixing mechanism includes a vertical mixing mechanism, and the mechanism includes a vertical mixing mechanism installed on a mixing motor bracket. Uniform motor, linear guide rail and slider, the top of the slider is fixed with a mixing ejector; the output shaft of the vertical mixing motor is coaxially fixed with an eccentric wheel, and the eccentric wheel is connected with the guide rail slider through a connecting rod; the lifting mechanism includes The lifting bottom plate is equipped with lifting motors and guide rods. The top of each guide rod is connected with a lifting plate; The screw nut is screwed together; the mixing motor bracket is fixed on the lifting plate. The device of the utility model can realize the reciprocating movement of the test tube in the vertical direction with variable speed, which is more conducive to the mixing of blood samples in the test tube; it can control the positioning of the mixing ejector rod in the vertical direction, and the degree of automation is higher.

Description

Mixing device for hematology analyzer

technical field

The utility model relates to a blood cell analyzer, in particular to a mixing device of the blood cell analyzer.

Background technique

On the three-classification and five-classification blood cell analyzers, the blood samples placed in the test tubes placed in the test tube rack must be fully and reasonably mixed before sampling to ensure the correctness and stability of the test results. At present, the main methods for mixing samples in test tubes are manual mixing and mechanical mixing. Due to the faster detection speed of samples at the present stage, the increase in the amount of sample detection and the increasing automation of automatic sampling, manual mixing has the defects of heavy workload, high work cost and the risk of contamination. Mechanical mixing generally uses a test tube clamping device to clamp the test tube, and through a specific mechanism to achieve the horizontal movement, vertical movement, swing and rotation of the test tube clamp and the test tube to achieve the purpose of mixing blood.

The realization methods of the existing mechanical mixing mechanism mainly include:

1. The test tube performs three-dimensional horizontal movement and flipping in space. Generally, the test tube is clamped with a test tube clamp, the test tube clamp is vertically upward, moved away from the test tube rack, and then moved horizontally for a certain distance to start horizontal reciprocating motion and swing. Because this kind of mechanism needs to avoid the position that interferes with the test tube rack during the mixing process, the space requirement for its movement is relatively large, and the movement sequence is many, and the way of holding the test tube is sometimes not very reliable.

2. The test tube rotates around its vertical axis. For example, the utility model patent with the publication number CN200965530 discloses a mixing and scanning device for a blood cell analyzer, including an eccentric wheel, an eccentric wheel support shaft, an eccentric wheel support plate, a support rod, a transmission gear, a fixed plate, a mixing motor, an eccentric There is a raised part in the middle of the upper part of the wheel. The mixing motor is fixed on the fixed plate, and the bearing is embedded in the eccentric wheel support plate. One end of the eccentric wheel support shaft is connected to the eccentric wheel, and the other end is connected to the transmission gear. In the bearing, the eccentric wheel support plate is fixed on the fixed plate through the support rod, and the mixing motor is connected with the eccentric wheel through the transmission gear and the eccentric wheel support shaft. The structure of this utility model is relatively simple, and the purpose of mixing is achieved by driving the test tube for eccentric rotation, but the eccentric wheel in direct contact with the test tube in the device cannot move in the vertical direction, so it is necessary to artificially connect the test tube cover with the raised part of the eccentric wheel Only after fitting can the mixing motor be started, and then the mixing motor drives the test tube to rotate eccentrically, so the degree of automation is not high enough.

Utility model content

The technical problem to be solved by the utility model is to provide a test tube that can automatically lift the test tube rack, and realize the speed-changing linear motion operation of the test tube in the vertical direction without detaching from the test tube rack, so as to achieve rapid mixing of blood samples The mixing device used on the hematology analyzer. The device has a high degree of automation and a good mixing effect.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

The mixing device of the hematology analyzer is mainly composed of a mixing mechanism and a lifting mechanism, wherein,

The mixing mechanism includes a vertical mixing mechanism, which includes a mixing motor bracket, a vertical mixing motor, a vertically arranged linear guide rail and a slider that slides and cooperates with the linear guide rail, and the top of the slider is fixed. There is a mixing ejector; the output shaft of the vertical mixing motor is fixed coaxially with an eccentric wheel, and the eccentric wheel is connected to the slider through a connecting rod;

The lifting mechanism includes a lifting base plate equipped with a lifting motor. At least two bearing holes are opened on the lifting base plate. Linear bearings and guide rods matched with the linear bearings are arranged in each bearing hole. Plate connection; the output shaft of the lifting motor is coaxially fixed with the lifting screw, and the other end of the lifting screw is screwed with the lifting screw nut fixed on the lifting plate;

The mixing motor bracket is fixed on the lifting plate of the lifting mechanism.

The mixing device described in the utility model includes a mixing mechanism and a lifting mechanism at the same time. Since the mixing mechanism is fixed on the lifting plate of the lifting mechanism, the vertical movement of the mixing ejector rod in the mixing mechanism can be realized through the lifting mechanism. Positioning, and the mixing ejector directly contacts the bottom of the test tube, so the vertical positioning of the test tube in the test tube rack can be realized. After the test tube is positioned, the eccentric wheel drives the mixing ejector in the vertical direction driven by the vertical mixing motor. In the direction of linear motion with variable speed, the space for the blood sample to move up and down in the test tube is larger than that of the eccentric rotation in the test tube. Therefore, this device can realize the mixing operation of blood samples faster and better, and the degree of automation is also high. higher.

In order to make the test tube rotate around the axis of the test tube while it is reciprocating at a vertical variable speed, so as to achieve a better mixing effect, the mixing mechanism described in this device also includes a rotating mixing mechanism, which includes The frame of the hematology analyzer or the fixed bracket on the bracket of the mixing motor is equipped with a rotating mixing motor and a guide sleeve with an opening facing down. The output shaft of the rotating mixing motor is coaxially fixed with the friction wheel in the guide sleeve. Then, the guide sleeve is coaxial with the mixing ejector pin. The rotating friction wheel makes short contact with the test tube cover of the test tube moving to the top of the guide sleeve, thereby driving the test tube to rotate around its vertical axis, thereby achieving a better mixing effect. In order to reduce the impact force between the friction wheel and the test tube cover, a rubber pad or spring can be arranged on the friction wheel.

In order to limit the lifting of the lift plate, the lift mechanism also includes a lift limit mechanism, which includes a lift optocoupler mounted on the lift base plate and a lift optocoupler mounted on the lift plate to cooperate with the lift optocoupler block.

In order to realize the limit and positioning of the mixing ejector pin, the vertical mixing mechanism also includes an initial limit mechanism, which includes an initial limit optocoupler installed on the mixing motor bracket and an optical coupler installed on the slider and The initial limit optocoupler block that matches the initial limit optocoupler.

When the mixing ejector pin is made of a relatively rigid material, it is better to arrange a shock absorber on the top of the mixing ejector pin. The shock-absorbing device is a silicone sleeve and/or a spring set on the mixing ejector pin.

The mixing mechanism is to fix the mixing fixed bracket on the lifting plate of the lifting mechanism.

In order to reduce the noise when the vertical mixing mechanism moves up and down, a shock-absorbing pad or a shock-absorbing foot can be provided on the mixing motor support, and a bolt can pass through the lifting plate and be tightened on the shock-absorbing pad or the shock-absorbing foot.

The number of bearing holes on the lifting bottom plate is preferably 3-6.

The vertical mixing motor, the lifting motor and the rotating mixing motor are all linear stepping motors.

Compared with the prior art, the utility model has the advantages of:

1. The eccentric wheel and the slider are connected by a connecting rod, which converts the eccentric rotary motion into a variable-speed linear motion, so that the test tube in contact with the mixing ejector can achieve a variable-speed reciprocating motion in the vertical direction, which is more conducive to the mixing of blood samples in the test tube , so as to achieve faster and better mixing operation of blood samples;

2. Fix the mixing motor bracket on the lifting plate, and the lifting motor can be used to control the vertical positioning of the entire vertical mixing mechanism (that is, the vertical positioning of the mixing ejector rod), which is more conducive to operation and automatic procedures higher;

3. As an improvement of the utility model, the mixing mechanism also includes a rotating mixing mechanism, so that the test tube can not only perform variable-speed reciprocating motion in the vertical direction, but also realize rotation around its axis, further enhancing the mixing effect, reducing mixing time.

Description of drawings

Fig. 1 is the structure diagram of an embodiment of the mixing device of the utility model blood cell analyzer;

Fig. 2 is a schematic structural view of another embodiment of the mixing device of the hematology analyzer of the present invention;

Fig. 3 is a schematic structural view of the embodiment shown in Fig. 2 working with the test tube rack.

The labels in the figure are:

1 Spring; 2 Silicone sleeve; 3 Mixing ejector rod; 4 Guide rail slider; 5 Initial limit optocoupler block; 6 Connecting rod; 7 Eccentric wheel; Coupling; 11 mixing base; 12 lifting bottom plate; 13 guide rod; 14 lifting plate; 15 lifting optocoupler block; 16 lifting screw; 17 lifting screw nut; 18 bolt; ; 21 fixed bracket; 22 rotary mixing motor; 23 friction wheel; 24 guide sleeve; 25 lifting motor; 26 test tube; 27 test tube rack;

Detailed ways

As shown in Figure 1, the mixing device of the blood cell analyzer described in the present utility model is mainly composed of a mixing mechanism and a lifting mechanism, wherein,

The mixing mechanism includes a vertical mixing mechanism, which includes an "L"-shaped mixing motor bracket 19, a vertical mixing motor is installed on the horizontal section of the bracket, and several shock-absorbing feet 9 are installed around it. A linear guide rail 20 and an initial limit photocoupler 8 parallel to the linear guide rail 20 are longitudinally arranged on one side of the horizontal section. The initial limit optocoupler block 5 matched with the initial limit optocoupler 8, the two cooperate to realize the limitation and positioning of the mixing ejector pin 3; a mixing ejector pin 3 is fixed on the top of the slider 4 , the top of the mixing ejector rod 3 is fitted with a silicone sleeve 2, and a spring 1 is set on the silicone sleeve 2; the output shaft of the vertical mixing motor passes through the mixing motor bracket 19 to the side where the linear guide rail 20 is installed and an eccentric wheel 7 Coaxial fixed connection, the eccentric wheel 7 and the slider 4 are connected by a connecting rod 6; the stroke of the up and down reciprocating movement of the mixing ejector rod 3 can be determined by controlling the length of the connecting rod 6;

Described elevating mechanism comprises elevating bottom plate 12, and its bottom end is equipped with elevating motor 25, and is provided with 4 bearing holes on elevating base plate 12, and linear bearing and the guide bar 13 that cooperates with this linear bearing are arranged in each bearing hole, described The top of each guide rod 13 is connected with a lifting plate 14; the output shaft of the lifting motor 25 is coaxially connected with the lifting screw 16, and the other end of the lifting screw 16 is connected with the lifting screw fixed on the lifting plate 14. Nut 17 is threadedly matched; Lifting optocoupler 10 is installed on the side of lifting base plate 12, and lifting optocoupler blocking plate 15 is installed on lifting plate 14 corresponding to lifting optocoupler 10 on lifting base plate 12, and both cooperate to realize lifting plate 14 The lifting limit; in order to facilitate the installation of the entire lifting mechanism on the frame of the hematology analyzer, the lifting bottom plate 12 in the lifting mechanism can be installed on a mixing base 11, and then the mixing base 11 can be installed on the rack;

The transverse end of the mixing motor bracket 19 extends below the lifting base plate 12 and is placed on the mixing base 11. Several bolts 18 pass through the lifting plate 14 and are tightened on each shock-absorbing foot 9, thereby fixing the bracket 21 is fixed on the lifting plate 14 of the lifting mechanism.

The above-mentioned vertical mixing motor, lifting motor 25 and rotating mixing motor 22 are preferably linear stepping motors.

As an improvement of the above-mentioned embodiment, the mixing mechanism in the device of the present invention also includes a rotating mixing mechanism, which includes a fixed bracket 21 fixed to the frame of the hematology analyzer, on which a rotating mixing motor 22 is installed. And a guide sleeve 24 with an opening facing down, the output shaft of the rotary mixing motor 22 is coaxially fixed with the friction wheel 23 in the guide sleeve 24, and the friction wheel 23 is sleeved with a spring 1, and the whole rotary mixing mechanism is installed. It should be ensured that the axis of the guide sleeve 24 is the same as the axis of the mixing ejector pin 3 , as shown in FIG. 2 . The rotating friction wheel 23 makes brief contact with the test tube cover of the test tube 26 that moves to the top of the guide sleeve 24, thereby driving the test tube 26 to rotate around its axis, thereby achieving a better mixing effect.

The course of work of the device described in the utility model is:

1. Initial state: Initially, the lifting optocoupler block 15 is stuck in the lifting optocoupler 10, the initial limit optocoupler block 5 is stuck in the initial limit optocoupler 8, the vertical mixing mechanism and the lifting mechanism are in the initial state ;

2. Test tube lifting: When the test tube 26 moves to the top of the mixing ejector rod 3 with the test tube rack 27, the lifting plate 14 is driven upward by the cooperation of the lifting screw 16 and the lifting screw nut 17, and the lifting plate 14 drives the entire vertical mixing The mechanism moves upwards, and the mixing ejector rod 3 passes through the hole at the bottom of the test tube rack 27 to lift the test tube 26 during the upward movement, and the test tube 26 is lifted from the test tube rack 27 and its top enters the guide sleeve 24;

3. Vertical reciprocating mixing: the vertical mixing motor drives the mixing ejector 3 to move back and forth with variable speed in the vertical direction through the action of the eccentric wheel 7, the linear guide rail 20 and the slider 4 to perform mixing operation. During the whole movement process, the test tube The upper end of 26 is in the guide groove 28, and the lower end is still in the test tube rack 27;

4. Rotate and mix around the axis of the test tube: When the test tube 26 is lifted, the rotating and mixing motor 22 is turned on. During the reciprocating motion of the test tube 26 in the vertical direction, the test tube cover at the top of the test tube is pushed against the inner friction wheel 23 of the guide sleeve 24. When the spring is 1, the test tube cover is driven by the spring 1 on the friction wheel 23 driven by the rotary mixing motor 22 to rotate unevenly around its axial direction (because the compression of the test tube 26 changes in the vertical motion of the spring 1, the test tube 26 is subjected to frictional force also changes, thereby the rotational movement of test tube 26 is uneven), when test tube 26 descends and breaks away from the spring 1 on the friction wheel 23, the friction between test tube 26 and guide sleeve 24 and mixing push rod 3 Unequal speed deceleration and rotation work;

5. Through multiple cycles of steps 3 and 4 to achieve the effect of mixing;

6. The rotating motor stops, the vertical mixing mechanism stops at the initial position through the positioning of the optocoupler, and the lifting mechanism descends to the initial position so that the test tube rack 27 can move forward smoothly.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or replacement can also be made, which should be regarded as the protection scope of the utility model.

Claims (10)

1. The mixing device of the hematology analyzer is mainly composed of a mixing mechanism and a lifting mechanism, and is characterized in that: Described mixing mechanism comprises vertical mixing mechanism, and this mechanism comprises mixing motor support (19), and vertical mixing motor, vertically arranged linear guide (20) and the linear guide (20) that is installed on the support and this linear guide (20) slide fit The slider (4), the top of the slider (4) is fixed with a mixing ejector pin (3); the output shaft of the vertical mixing motor is coaxially fixed with an eccentric wheel (7), and the eccentric wheel (7) Connect with slide block (4) by connecting rod (6); The lifting mechanism includes a lifting base plate (12) on which a lifting motor (25) is installed, and at least two bearing holes are provided on the lifting base plate (12), and linear bearings and guide rods matched with the linear bearings are arranged in each bearing hole. (13), the top of each guide rod (13) is connected with a lifting plate (14); the output shaft of the lifting motor (25) is coaxially fixed with the lifting screw (16), and the lifting screw (16) The other end of the other end is threadedly engaged with the lifting screw nut (17) fixed on the lifting plate (14); The mixing motor bracket (19) is fixed on the lifting plate (14) of the lifting mechanism. 2. The mixing device of the blood cell analyzer according to claim 1, characterized in that: the mixing mechanism also includes a rotating mixing mechanism, which includes a frame fixed on the blood cell analyzer or a mixing motor support ( 19) on the fixed bracket (21), on which the rotary mixing motor (22) and the guide sleeve (24) with the opening facing down are installed, and the output shaft of the rotary mixing motor (22) is connected to the inside of the guide sleeve (24). The friction wheel (23) is coaxially fixed, and the described guide sleeve (24) is coaxial with the mixing ejector pin (3). 3. The mixing device of the hematology analyzer according to claim 2, characterized in that: the friction wheel (23) is provided with a rubber pad or a spring (1). 4. The mixing device of the blood cell analyzer according to claim 1, 2 or 3, characterized in that: the lifting mechanism also includes a lifting limit mechanism, which includes a lifting mechanism installed on the lifting bottom plate (12). An optocoupler (10) and a lift optocoupler block (15) that is installed on the lift plate (14) and cooperates with the lift optocoupler (10). 5. The mixing device of the hematology analyzer according to claim 4, characterized in that: the vertical mixing mechanism also includes an initial limit mechanism, which includes an initial stop mounted on the mixing motor bracket (19). The limit optocoupler (8) and the initial limit optocoupler block (5) that is installed on the slider and cooperates with the initial limit optocoupler (8). 6. The mixing device of the blood cell analyzer according to claim 1, characterized in that: a shock absorbing device is arranged at the top of the mixing ejector rod (3). 7. The mixing device of the blood cell analyzer according to claim 6, characterized in that: the shock absorbing device is a silicone sleeve (2) and/or a spring (1). 8. The mixing device of the blood cell analyzer according to claim 1, characterized in that: the mixing motor support (19) is provided with a shock-absorbing pad or a shock-absorbing foot (9), and the bolt (18) passes through Lifting plate (14) is screwed on the shock pad or the shock-absorbing foot (9). 9. The mixing device of the blood cell analyzer according to claim 1, characterized in that: the number of bearing holes on the lifting bottom plate (12) is 3-6. 10. The mixing device of the blood cell analyzer according to claim 2, characterized in that: the vertical mixing motor, the lifting motor (25) and the rotating mixing motor (22) are all linear stepping motors.

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