CN212060288U

CN212060288U - Sample double-needle sample adding device

Info

Publication number: CN212060288U
Application number: CN202020120671.2U
Authority: CN
Inventors: 吴斌; 秦珍珠; 徐传运
Original assignee: Urit Medical Electronic Co Ltd
Current assignee: Urit Medical Electronic Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-12-01
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a sample double needle application of sample device, through application of sample needle drive assembly drive can realize that first sample needle and second sample needle carry out solitary vertical motion respectively, can be according to the control demand, and the double needle contacts the liquid level simultaneously or contacts the liquid level alone. The liquid level sensing assembly can realize the detection and feedback of the vertical movement position of the sample needle; the anti-collision module can prevent the sample needle from being damaged when the sample needle is vertically impacted; the utility model discloses a mode of sample double needle application of sample device adopts the independent application of sample of double needle in high-speed biochemical appearance, can solve the double needle and volve the flowing back application of sample to the unstable problem of liquid way system height requirement and application of sample, simultaneously, because the sample needle can carry out vertical motion alone, avoids the double needle simultaneously to the reaction liquid level, produces and carries the pollution to instrument testing result's accuracy has been improved.

Description

Sample double-needle sample adding device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a sample double needle application of sample device.

Background

At present, a sample adding device in a full-automatic biochemical analyzer is mainly used for adding samples and is an indispensable important device in a full-automatic biochemical analyzer system. In sample adding methods in a full-automatic biochemical analyzer, there are generally 2 sample adding methods:

the first method is as follows: adding a sample into a reaction cup, namely, putting a sample needle at the bottom of the reaction cup, then, beating the sample out, and dipping the sample at the bottom of the reaction cup;

the method comprises the following steps: firstly, adding a reagent and then adding a specimen, wherein the first mode is that a sample needle is lowered to a position below the liquid level where the reagent is added firstly, and then the sample is ejected; secondly, the sample needle is lowered to a certain height above the liquid level filled with the reagent firstly, and the sample is knocked out in the air; the second mode is higher in sample adding precision at present, and satisfactory sample adding accuracy and repeatability can be obtained under the condition of 1 uL. However, in the case of the double-needle structure of the high-speed biochemical analyzer, if the sample is to be loaded below the liquid level, the sample needle is contaminated and cannot be loaded on the reaction cup of the second circle, which may be different reagent items, thereby causing reagent cross-contamination.

In a high-speed full-automatic biochemical analyzer, particularly on a biochemical analyzer with the speed of more than 1200, most instruments on the market adopt a reaction disc with a double-layer structure, sample adding needles are of a double-needle structure and are of a fixed structure, so that the sample adding function can only adopt the volley drainage adding, because the double needles can cause serious carrying cross contamination if adding the sample to the liquid level, and the volley drainage adding is difficult to obtain satisfactory adding accuracy and repeatability under the condition of small sample amount, so that the accuracy of an instrument detection result is greatly influenced, which is a difficult problem. The utility model discloses this technological problem can effectively be solved to the sample application of sample device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sample double needle application of sample device aims at solving in high-speed full-automatic biochemical analysis appearance, and the sample needle of double needle structure can not be gone down to the problem of liquid level application of sample.

In order to achieve the purpose, the utility model discloses a sample double-needle sample adding device, including sample adding needle mounting bracket, sample adding needle drive assembly and double-needle subassembly, sample adding needle drive assembly with double-needle subassembly adjacent fix on the sample adding needle mounting bracket, sample adding needle drive assembly includes motor fixed panel beating, driving motor, dial wheel and spacing opto-coupler, driving motor passes through motor fixed panel beating with sample adding needle mounting bracket fixed connection, the dial wheel is fixed connection with the output of driving motor, spacing opto-coupler with motor fixed panel beating fixed connection, and lie in below the dial wheel;

the double-needle assembly comprises two guide modules, two first sample needles, two second sample needles, a movement return spring and an adjusting block, the adjusting block is fixedly connected with the sample adding needle mounting frame and is located below the two guide modules, the two guide modules are arranged above the adjusting block, the movement return spring is arranged between each guide module and the adjusting block, the first sample needles and the second sample needles are respectively arranged on the two guide modules, the first sample needles and the second sample needles penetrate through the adjusting block, and the driving motor controls the dial wheel to rotate forwards and backwards to respectively drive the first sample needles and the second sample needles to move downwards to realize sample adding.

The guide module comprises a guide block, a guide base and an anti-collision guide post, the guide block is respectively and fixedly connected with the first sample needle and the second sample needle, the guide block is fixedly connected with the motion return spring and is positioned below the guide block, and the anti-collision guide post is fixedly connected with the guide base.

Wherein, the duplex subassembly still includes the anticollision module, the anticollision module includes anticollision opto-coupler and anticollision reset spring, the anticollision opto-coupler with anticollision reset spring all sets up on the anticollision guide post.

The poking wheel is provided with a boss which is matched with the guide block to move, and a plurality of limiting grooves which are matched with the limiting optocouplers.

The double-needle assembly further comprises a guide post, a positioning sleeve and a double-needle sleeve, one end of the guide post is fixedly connected with the adjusting block, the other end of the guide post penetrates through the guide base and the guide block, the motion reset spring sleeve is arranged outside the guide post, the double-needle sleeve is fixedly connected with the adjusting block and is located below the adjusting block, and one ends, far away from the guide block, of the first sample needle and one ends, far away from the guide block, of the second sample needle are fixed in the double-needle sleeve through the positioning sleeve.

Wherein, sample double needle application of sample device still includes liquid level response subassembly, liquid level response subassembly includes PCBA board and installation panel beating, the installation panel beating with application of sample needle mounting bracket fixed connection, and be located application of sample needle mounting bracket is kept away from the one end of double needle subassembly, PCBA board with installation panel beating fixed connection, and through the wire with the double needle sub-assembly is connected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the sample double-needle sample adding device of the present invention;

fig. 2 is a schematic view of a partially enlarged structure of the sample double-needle sample adding device of the present invention;

FIG. 3 is a schematic structural view of the double needle assembly of the present invention;

fig. 4 is a schematic structural view of the sample adding needle driving assembly of the present invention;

FIG. 5 is a schematic view of the driving assembly during sample application;

FIG. 6 is a schematic view of the state of the double needle assembly during sample application;

FIG. 7 is a schematic view showing the vertical impact of the sample needle during sample application;

in the figure: 1-sample adding needle mounting rack, 2-double needle assembly, 3-sample adding needle driving assembly, 4-liquid level sensing assembly, 5-collision avoidance module, 6-limit optical coupler, 7-reaction cup, 21-first sample needle, 22-second sample needle, 23-guide module, 231-guide block, 232-guide base, 233-collision avoidance guide column, 24-guide column, 25-motion reset spring, 26-adjusting block, 27-positioning sleeve, 28-double needle sleeve, 31-driving motor, 32-motor fixing metal plate, 33-poking wheel, 331-boss, 332-limit groove, 41-PCBA plate, 42-mounting metal plate, 51-collision avoidance optical coupler and 52-collision avoidance reset spring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 7, the utility model provides a sample double-needle sample adding device, including sample adding needle mounting bracket 1, sample adding needle drive assembly 3 and double-needle assembly 2 are adjacently fixed on sample adding needle mounting bracket 1, sample adding needle drive assembly 3 includes motor fixing metal plate 32, drive motor 31, dial wheel 33 and limiting optical coupler 6, drive motor 31 is fixedly connected with sample adding needle mounting bracket 1 through motor fixing metal plate 32, dial wheel 33 is fixedly connected with the output end of drive motor 31, limiting optical coupler 6 is fixedly connected with motor fixing metal plate 32 and is located below dial wheel 33;

the double-needle assembly 2 comprises a guide module 23, a first sample needle 21, a second sample needle 22, a movement return spring 25 and an adjusting block 26, wherein the adjusting block 26 is fixedly connected with the sample adding needle mounting rack 1, and is located below the two guide modules 23, the number of the guide modules 23 is two, the two guide modules 23 are arranged above the adjusting block 26, the motion return spring 25 is arranged between each guide module 23 and the adjusting block 26, the first sample needle 21 and the second sample needle 22 are respectively provided on two guide modules 23, and the first sample needle 21 and the second sample needle 22 penetrate the regulating block 26, the driving motor 31 controls the dial wheel 33 to rotate forward and backward to drive the first sample needle 21 and the second sample needle 22 to move downward for sample loading.

Further, the guide module 23 includes a guide block 231, a guide base 232, and an anti-collision guide post 233, the guide block 231 is fixedly connected to the first sample needle 21 and the second sample needle 22, respectively, the guide block 231 is fixedly connected to the movement return spring 25 and is located below the guide block 231, and the anti-collision guide post 233 is fixedly connected to the guide base 232.

Further, the double-needle assembly 2 further comprises an anti-collision module 5, the anti-collision module 5 comprises an anti-collision optical coupler 51 and an anti-collision return spring 52, and the anti-collision optical coupler 51 and the anti-collision return spring 52 are arranged on the anti-collision guide post 233.

Further, the dial wheel 33 is provided with a boss 331 which is matched with the guide block 231 for movement, and a plurality of limiting grooves 332 matched with the limiting optical coupler 6.

Further, the double-needle assembly 2 further comprises a guide post 24, a positioning sleeve 27 and a double-needle sleeve 28, wherein one end of the guide post 24 is fixedly connected with the adjusting block 26, the other end of the guide post 24 penetrates through the guide base 232 and the guide block 231, the motion return spring 25 is sleeved outside the guide post 24, the double-needle sleeve 28 is fixedly connected with the adjusting block 26 and is located below the adjusting block 26, and one ends of the first sample needle 21 and the second sample needle 22, which are far away from the guide block 231, are fixed in the double-needle sleeve through the positioning sleeve 27.

Further, sample double needle application of sample device still includes liquid level response subassembly 4, liquid level response subassembly 4 includes PCBA board 41 and installation panel beating 42, installation panel beating 42 with 1 fixed connection of application of sample needle mounting bracket, and be located 1 keeping away from of application of sample needle mounting bracket 2's one end, PCBA board 41 with installation panel beating 42 fixed connection, and through the wire with double needle subassembly 2 connects.

In this embodiment, the sample double-needle sample adding device includes the sample needle mounting rack, the sample needle driving assembly 3, the double-needle assembly 2 and the liquid level sensing assembly 4, the sample needle driving assembly 3 is mounted on the sample needle mounting rack 1 adjacent to the double-needle assembly 2, the sample needle driving assembly 3 is provided with one of the toggle wheels 33, and is mounted on a motor shaft of the driving motor 31, the driving motor 31 controls the toggle wheel 33 to rotate forward and backward to drive the first sample needle 21 and the second sample needle 22 of the double-needle assembly 2 to move downward respectively, the guide blocks 231 are fixedly connected with the first sample needle 21 and the second sample needle 22 respectively, the toggle wheel 33 realizes the double-needle downward movement by the guide base 232, the movement return spring 25 makes the guide module 23 return to the initial position after the sample adding is completed and the toggle wheel 33 returns, the reset action is completed, the anti-collision module 5 comprises the anti-collision optocoupler 51 and the anti-collision reset spring 52, the anti-collision optocoupler 51 is matched with the guide block 231 to realize an anti-collision function, and the anti-collision reset spring 52 is restored to a normal state after the anti-collision function is triggered; the liquid level sensing assembly 4 is mounted at one end, far away from the double-needle assembly 2, of the sample adding needle mounting frame 1 through the fixing metal plate, and is connected with the double needles through a lead to achieve a liquid level sensing function;

the dial wheel 33 is designed with a structure similar to a coded disc, and the coded disc of the dial wheel 33 rotates in a groove of the limit optical coupler 6. The boss 331 and the plurality of limiting grooves 332 are arranged on the coded disc of the dial wheel 33, and the boss 331 and the guide block 231 of the double-needle assembly 2 move in a matching manner; the limiting groove 332 is matched with the limiting optocoupler 6 to realize motion positioning or limiting.

The driving motor 31 rotates forward and backward to enable the poking wheel 33 to rotate clockwise or anticlockwise, the limiting grooves 332 are formed in the two sides of the boss 331 of the poking wheel 33, and the poking wheel 33 cannot rotate excessively whether rotating clockwise or anticlockwise to crash the limiting optocoupler 6; after the dial wheel 33 rotates by a certain angle, the boss 331 contacts with the guide base 232 of the double-needle assembly 2, and the double-needle assembly 2 moves downwards to the reaction cup 7 for sample adding by continuing to rotate.

The guide module 23 and the motion return spring 25 are respectively installed in the guide post 24 and can freely slide, and the other end of the guide block 231 of the guide module 23 is connected with a sample needle, which can drive the sample needle to perform the same action together with the guide block 231; the first sample needle 21 and the second sample needle 22 are fixed in the double needle cannula 28 by the positioning sleeve 27, the double needle cannula 28 and the guide column 24 are respectively fixed on the adjusting block 26, and the double needle assembly 2 is mounted on the loading needle mounting bracket 1 by the adjusting block 26.

The first sample needle 21 and the second sample needle 22 are in clearance fit with the positioning sleeve 27 and the guide base 232, the sample needle can slide freely in a certain period, is fixedly connected with the guide block 231, and moves along with the guide block 231, the positioning sleeve 27 is tightly matched with the double-needle sleeve 28, the double-needle sleeve 28 is relatively fixed in the adjusting block 26, the guide column 24 is installed on the adjusting block 26, the motion return spring 25 is sleeved in the guide column 24, and the top of the motion return spring is abutted against the bottom of the guide base 232 and has a certain compression amount.

The anti-collision guide post 233 is mounted on the guide base 232, and the anti-collision optocoupler 51 and the anti-collision return spring 52 of the anti-collision device are both mounted on the anti-collision guide post 233. The guide block 231 is provided with a structure similar to a baffle plate, and is matched with the anti-collision optocoupler 51 and the anti-collision return spring 52 to realize an anti-collision function. The anticollision opto-coupler 51 is installed on anticollision guide post 233 top, anticollision reset spring 52 is installed in anticollision guide post 233, makes behind the realization anticollision function guide block 231 resets.

The guide bottom block and the guide base 232 of the guide module 23 are separable to realize an anti-collision action, the anti-collision guide post 233 is mounted on the guide base 232 and passes through the guide block 231, the anti-collision return spring 52 is sleeved in the middle of the anti-collision guide post 233 and has a certain compression amount, and the anti-collision optocoupler 51 is mounted at the top of the anti-collision guide post 233; under a normal state, the top of the guide base 232 abuts against the bottom of the guide block 231 and is relatively pressed by the motion return spring 25 and the anti-collision return spring 52, when a sample needle is vertically impacted, the guide base 232 is separated from the guide block 231, the guide base 232 continuously descends to the blocking piece structure of the guide block 231 and enters the anti-collision optocoupler 51 to trigger an optocoupler signal, and an instrument control system sends a command to stop the driving motor 31, so that the sample injection needle is prevented from being damaged due to impact, and the use cost of the instrument is reduced; after the normal state is recovered, the motion return spring 25 and the anti-collision return spring 52 work together to enable the guide base 232 and the guide block 231 to be attached again.

When the first sample needle 21 or the second sample needle 22 of the double-needle assembly 2 moves downwards to the liquid level in the reaction cup 7, liquid level sensing is triggered, the PCBA board 41 receives a signal and feeds the signal back to the instrument control system, and the instrument control system controls the driving motor 31 of the sampling needle driving assembly 3 to stop operating, so that the liquid level sensing function is realized.

In this embodiment, the driving motor 31 of the sample dual-needle sample adding device receives a sample adding signal to drive, the dial wheel 33 rotates clockwise or counterclockwise, the boss 331 thereof contacts the guide module 23 of the dual-needle assembly 2, the rotation continues to make the guide module 23 carry the first sample needle 21 or the second sample needle 22 to move downward into the reaction cup 7, the needle point contacts the liquid level to trigger a liquid level sensing signal, the liquid level reaction system receives the signal and then feeds back the information to the instrument control system, the instrument control system sends a signal to stop the driving motor 31, the sample needle stays at the liquid level position to perform a sample adding action, after the sample adding is completed, the driving motor 31 rotates reversely, the guide module 23 moves upward under the action of the motion return spring 25, at this time, the limit slot 332 at the initial position of the dial wheel 33 enters the limit optical coupler 6, triggering the optical coupler signal, the instrument control system sends a signal to enable the driving motor 31 to stop acting, at the moment, the boss 331 and the guide module 23 on the poking wheel 33 all return to the initial position, and one round of sample adding action is completed.

If the sample needle does not contact the liquid level or trigger the anti-collision function in the downward movement process, the driving motor 31 continues to rotate, at this time, the limiting grooves 332 on the two sides of the boss 331 of the dial wheel 33 enter the limiting optical coupler 6 to trigger an optical coupler signal, and an instrument control system also sends a signal to stop the driving motor 31, so that the dial wheel 33 and the limiting optical coupler 6 are prevented from colliding to damage the optical coupler, and the use cost is reduced.

In summary, the following steps: the utility model discloses a sample double-needle sample adding device, which is connected to a rotating shaft of a sample adding mechanism by taking a sample adding needle mounting rack 1 as a carrier, and all components and devices are mounted on the sample adding needle mounting rack; the double-needle assembly 2 comprises the first sample needle 21, the second sample needle 22 and corresponding movement resetting structures, the first sample needle 21 and the second sample needle 22 can respectively perform independent vertical movement by being driven by the sample adding needle driving assembly 3, and the detection and feedback of the vertical movement position of the sample needle can be realized by the liquid level sensing assembly 4; the collision prevention module 5 can prevent the sample needle from being damaged due to vertical impact; the utility model discloses a mode of sample double needle application of sample device in high-speed biochemical appearance, the independent application of sample of application double needle can be solved the double needle and volve the flowing back application of sample and require to the liquid path system height and the application of sample unstable problem, simultaneously, because the sample needle can carry out vertical motion alone, avoids the double needle simultaneously to go down to the reaction liquid level, produces and carries the pollution to improve the accuracy of instrument testing result, here the utility model discloses several technical bottlenecks of high-speed biochemical instrument have effectively been solved: the minimum sample adding amount can reach 1uL, and the quasi-determination and CV value of the minimum sample adding amount are effectively improved; the risk of cross contamination is effectively reduced; the adverse effect of the sample adding action on the sample is effectively reduced, for example, the dilution and pollution to the sample can be reduced by 50 percent compared with the original; the subsequent test and use of the sample are not affected.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A sample double-needle sample adding device, which is characterized in that,

the sample feeding needle driving assembly and the double-needle assembly are adjacently fixed on the sample feeding needle mounting frame, the sample feeding needle driving assembly comprises a motor fixing metal plate, a driving motor, a poking wheel and a limiting optocoupler, the driving motor is fixedly connected with the sample feeding needle mounting frame through the motor fixing metal plate, the poking wheel is fixedly connected with the output end of the driving motor, and the limiting optocoupler is fixedly connected with the motor fixing metal plate and is positioned below the poking wheel;

2. The sample dual needle sample addition device of claim 1,

3. The sample dual needle sample addition device of claim 2,

the double-needle assembly further comprises an anti-collision module, the anti-collision module comprises an anti-collision optical coupler and an anti-collision reset spring, and the anti-collision optical coupler and the anti-collision reset spring are all arranged on the anti-collision guide post.

4. The sample dual needle sample addition device of claim 3,

the poking wheel is provided with a boss which is matched with the guide block to move and a plurality of limiting grooves matched with the limiting optocouplers.

5. The sample dual needle sample addition device of claim 4,

the double-needle assembly further comprises a guide post, a positioning sleeve and a double-needle sleeve, one end of the guide post is fixedly connected with the adjusting block, the other end of the guide post penetrates through the guide base and the guide block, the movement reset spring sleeve is arranged outside the guide post, the double-needle sleeve is fixedly connected with the adjusting block and located below the adjusting block, and the first sample needle and the second sample needle are far away from one end of the guide block and fixed in the double-needle sleeve through the positioning sleeve.

6. The sample dual needle sampling device according to any one of claims 1 to 5,

the sample double needle application of sample device still includes liquid level response subassembly, liquid level response subassembly includes PCBA board and installation panel beating, the installation panel beating with application of sample needle mounting bracket fixed connection, and be located application of sample needle mounting bracket is kept away from the one end of double needle subassembly, PCBA board with installation panel beating fixed connection, and through the wire with the double needle sub-assembly is connected.