Sample adding arm mechanism and analyzer

Abstract

The utility model discloses a sample adding arm mechanism and an analyzer, the sample adding arm mechanism comprises a liquid sucking and injecting module, a needle taking module, a needle removing module and a driving module, the liquid sucking and injecting module comprises a liquid taking pump, and a piston is arranged in the liquid taking pump; the needle taking module comprises an adapter and an adapter seat, the adapter is installed below the adapter seat in a lifting mode and used for being connected with the sample adding needle, and a flow channel is formed in the adapter seat and used for communicating the liquid taking pump and the adapter; the needle removing module comprises a needle removing sleeve which is arranged on the adapter in a sleeving mode. The driving module comprises a driving piece and a transmission piece, and the transmission piece is in transmission connection with the piston and the needle removing sleeve. According to the technical scheme, needle taking, liquid absorbing, liquid injecting and needle releasing functions are integrated on one sample adding arm mechanism, so that needle releasing can be realized without additionally arranging a needle releasing seat or a needle releasing motor, the structure and steps are simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of in vitro diagnostic medical equipment, in particular to a sample adding arm mechanism and an analyzer. Background Art

[0002] The sample arm is one of the main components of the analyzer, usually used in automated laboratories or medical testing institutions, to drive the disposable sample needle to perform sampling, transfer and reagent distribution operations, and to avoid cross infection, a new sample needle must be replaced after completing a test. Therefore, needle removal is an inevitable action after each sample addition.

[0003] Currently, there are two ways to achieve automatic needle removal by the loading arm: 1. A needle removal seat is set on the operating platform. After the loading is completed, the loading arm moves to the top of the needle removal seat and lowers the loading needle to the needle removal position on the needle removal seat for needle removal; 2. An additional needle removal motor is added to the loading arm to remove the loading needle.

[0004] From the above process, it can be seen that the suction and injection action and the needle removal action of the sample arm are separated from each other, which leads to a long detection process. Utility Model Content

[0005] The main purpose of the utility model is to provide a sample loading arm mechanism, which aims to integrate the liquid suction and injection functions and the automatic needle removal functions on one sample loading arm mechanism, thereby eliminating the need to add an additional needle removal seat or needle removal motor, thereby simplifying the structure and steps and accelerating the detection efficiency.

[0006] To achieve the above-mentioned purpose, the sample loading arm mechanism proposed in the utility model includes a liquid suction and injection module, a needle removal module, a needle removal module and a driving module, the liquid suction and injection module includes a liquid extraction pump, and a piston is arranged in the liquid extraction pump; the needle removal module includes an adapter and an adapter seat, and the adapter can be installed in a liftable manner under the adapter seat for connecting the sample loading needle, and a flow channel is arranged in the adapter seat to connect the liquid extraction pump and the adapter; the needle removal module includes a needle removal sleeve, and the needle removal sleeve is mounted on the adapter; the driving module includes a driving member and a transmission member, and the transmission member is respectively connected to the piston and the needle removal sleeve in a driving manner.

[0007] Optionally, the needle removal module also includes a needle removal plate and a needle removal rod, wherein the needle removal plate is sleeved on the circumference of the liquid extraction pump and is located below the transmission member, and the needle removal rod is penetrated through the adapter seat to connect the needle removal sleeve and the needle removal plate.

[0008] Optionally, the needle removal module further comprises an elastic member, wherein the elastic member is disposed between the adapter seat and the needle removal sleeve, and the needle removal sleeve is adapted to extend and retract upward and downward by squeezing the elastic member.

[0009] Optionally, the needle removal sleeve is connected to the needle removal rod via a connecting rod, the needle removal sleeve is sleeved on the connecting rod and can slide along the connecting rod, and the elastic member is a spring, which is sleeved on the connecting rod and located between the adapter seat and the needle removal sleeve.

[0010] Optionally, the loading arm mechanism also includes a fixed base, which includes a top plate, a bottom plate and a side plate connecting the top plate and the bottom plate, a mounting groove is formed between the top plate and the bottom plate, the driving member is installed on the top surface of the top plate, the liquid pump is arranged in the mounting groove and penetrates downward to the bottom surface of the bottom plate, and the transmission member and the needle removal plate can be raised and lowered in the mounting groove.

[0011] Optionally, the transmission member and the needle-removing plate are both sleeved on the circumference of the liquid extraction pump.

[0012] Optionally, a guide rod connecting the top plate and the bottom plate is provided in the mounting groove, the guide rod is passed through the transmission member and the needle removal plate, and the transmission member and the needle removal plate perform linear motion under the guidance of the guide plate.

[0013] Optionally, a seal is provided at the connection between the flow channel and the liquid pump.

[0014] Optionally, a linear bearing is arranged in the adapter seat, and the needle-removing rod is passed through the linear bearing.

[0015] The utility model also provides an analyzer, which includes an analysis mechanism and the above-mentioned sample adding arm mechanism, wherein the sample adding arm mechanism is used to inject the absorbed solution into the analysis mechanism, and the analysis mechanism is used to perform pre-treatment on the absorbed solution.

[0016] The sample loading arm mechanism of the utility model integrates the functions of needle removal, liquid aspiration, liquid injection and needle removal on one sample loading arm mechanism by providing a liquid aspiration and injection module, a needle removal module, a needle removal module and a driving module, and the liquid aspiration function is completed within the rising stroke of the transmission member, and the liquid injection function and the needle removal function are completed within the descending stroke of the transmission member, so there is no need to add an additional needle removal seat or needle removal motor to achieve needle removal, thereby simplifying the structure and steps and accelerating the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is an exploded view of an embodiment of the sample loading arm mechanism of the utility model;

[0019] Figure 2 It is a structural schematic diagram of an embodiment of the sample loading arm mechanism of the utility model;

[0020] Figure 3 It is a cross-sectional structural diagram of an embodiment of the sample loading arm mechanism of the utility model;

[0021] Figure 4 This is another cross-sectional structural schematic diagram of an embodiment of the sample loading arm mechanism of the utility model.

[0022] Description of Figure Numbers:

[0023] Label name Label name 11 Fixed seat 221 Runner 111 Mounting slot 222 Seals 112 roof 23 Sample needle 113 Base Plate 24 Linear Bearings 114 Side panels 31 Needle removal 12 Liquid pump 32 Needle stripping plate 121 piston 33 Needle removal bar 13 Drive parts 34 Connecting rod 14 Transmission parts 35 Elastic parts 15 Guide rod 41 Photoelectric switch 21 adapter 42 Baffle 22 Adapter seat

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] Currently, there are two ways to achieve automatic needle removal by the loading arm: 1. A needle removal seat is set on the operating platform. After the loading is completed, the loading arm moves to the top of the needle removal seat and lowers the loading needle to the needle removal position on the needle removal seat for needle removal; 2. An additional needle removal motor is added to the loading arm to remove the loading needle.

[0029] From the above process, it can be seen that the suction and injection action and the needle removal action of the sample loading arm are separated from each other, which leads to a long detection process. To this end, the utility model proposes a sample loading arm mechanism, which aims to integrate the suction and injection function and the automatic needle removal function on a sample loading arm mechanism, thereby eliminating the need to add an additional needle removal seat or needle removal motor, thereby simplifying the structure and steps and accelerating the detection efficiency.

[0030] Reference Figures 1 to 4 The embodiment of the sample loading arm mechanism includes a liquid suction and injection module, a needle removal module, a needle removal module and a driving module, wherein the liquid suction and injection module includes a liquid extraction pump, wherein a piston is arranged in the liquid extraction pump, and the needle removal module includes an adapter 21 and an adapter seat 22, wherein the adapter 21 is installed under the adapter seat 22 in a liftable manner for connecting the sample loading needle 23, and a flow channel 221 is arranged in the adapter seat 22 to connect the liquid extraction pump 12 and the adapter 21; the needle removal module includes a needle removal sleeve 31, wherein the needle removal sleeve 31 is sleeved on the adapter 21, and the upper end of the needle removal sleeve 31 is telescopically connected to the adapter seat 22, and the lower end surface of the needle removal sleeve 31 is higher than the lower end surface of the adapter 21, that is, the lower end portion of the adapter 21 extends out of the needle removal sleeve 31. The driving module includes a driving member 13 and a transmission member 14, wherein the transmission member 14 is respectively connected to the piston 121 and the needle removal sleeve 31. For example, the driving member 13 may be a motor, and the transmission member 14 is in transmission connection with the driving member 13, and moves up and down under the drive of the driving member 13. The transmission member 14 drives the piston 121 to move up and down under the drive of the driving member 13, thereby realizing liquid extraction or liquid injection, and the transmission member 14 continues to descend after the liquid injection is completed, thereby pressing down the needle removal sleeve 31, and the needle removal sleeve 31 applies a thrust to the sample injection needle 23, thereby causing the sample injection needle 23 to be separated from the adapter 21.

[0031] The sample loading arm mechanism of the utility model integrates the functions of needle removal, liquid aspiration, liquid injection and needle removal on one sample loading arm mechanism by providing a liquid aspiration and injection module, a needle removal module, a needle removal module and a driving module, and the liquid aspiration function is completed within the rising stroke of the transmission member, and the liquid injection function and the needle removal function are completed within the descending stroke of the transmission member, so there is no need to add an additional needle removal seat or needle removal motor to achieve needle removal, thereby simplifying the structure and steps and accelerating the detection efficiency.

[0032] Specifically, in one embodiment of the utility model, the needle removal module further includes a needle removal plate 32 and a needle removal rod 33, wherein the needle removal plate 32 is sleeved on the peripheral side of the liquid extraction pump 12 and is located below the transmission member 14, and the needle removal rod 33 is penetrated through the adapter seat 22 to connect the needle removal sleeve 31 and the needle removal plate 32. After the liquid injection is completed, the transmission member 14 contacts the needle removal plate 32, and the transmission member 14 continues to descend and then presses down the needle removal plate 32, and the needle removal plate 32 drives the needle removal rod 33 and the needle removal sleeve 31 to descend together, and the needle removal sleeve 31 applies a thrust to the sample addition needle 23 so that the sample addition needle 23 is separated from the adapter 21.

[0033] The specific working process of this sample adding arm mechanism is as follows:

[0034] Before needle removal, the sample adding needle 23 is neatly arranged on the needle plate. When the needle is removed, the sample adding arm mechanism moves to the needle plate position and then descends, and the sample adding needle 23 is gradually sleeved on the adapter 21. After the sample adding needle 23 abuts against the needle removal sleeve 31, the sample adding arm mechanism continues to descend, and the sample adding needle 23 applies an upward thrust to the needle removal sleeve 31, driving the needle removal sleeve 31 to move upward, and the needle removal sleeve 31 drives the needle removal rod 33 and the needle removal plate 32 to move upward until the needle removal sleeve 31 abuts against the adapter seat 22 and cannot continue to rise. At this time, the sample adding needle 23 is completely sleeved on the adapter 21, and the needle removal is completed.

[0035] After the needle is successfully taken out, the sample adding arm mechanism rises and moves to the liquid aspiration station, the sample adding needle 23 contacts the liquid to be aspirated, and the flow channel 221 in the adapter seat 22 is connected with the adapter 21, and then connected with the sample adding needle 23. Thus, the liquid taking pump 12, the flow channel 221, the adapter 21 and the sample adding needle 23 are connected to form a liquid taking channel. When aspirating liquid, the driving member 13 drives the transmission member 14 to move upward, and the transmission member 14 drives the piston 121 to move upward, forming a negative pressure in the liquid taking channel, thereby achieving liquid aspiration.

[0036] After the liquid aspiration is completed, the sample adding arm mechanism rises and moves to the liquid injection station, the driving member 13 drives the transmission member 14 to move downward, and the transmission member 14 drives the piston 121 to move downward, thereby achieving liquid injection.

[0037] After the injection is completed, the transmission member 14 moves just to contact the needle removal plate 32, the sample adding arm mechanism rises and moves to the needle removal position, and the driving member 13 drives the transmission member 14 to continue to move downward, and the transmission member 14 presses down the needle removal plate 32, thereby driving the needle removal rod 33 and the needle removal sleeve 31 to move downward together. The needle removal sleeve 31 presses down the sample adding needle 23 during the downward movement, thereby causing the sample adding needle 23 to gradually separate from the adapter 21 until the needle removal plate 32 hits the bottom plate 113 of the fixing seat 11 and cannot continue to descend, thereby completing the needle removal.

[0038] Reference Figure 4The needle removal module also includes an elastic member 35 , which is disposed between the adapter seat 22 and the needle removal sleeve 31 , and the needle removal sleeve 31 is able to extend and retract up and down by squeezing the elastic member 35 .

[0039] Specifically, the needle removal sleeve 31 is connected to the needle removal rod 33 through a connecting rod 34. The needle removal sleeve 31 is sleeved on the connecting rod 34 and can slide up and down along the connecting rod 34. The connecting rod 34 is arranged below the needle removal rod 33 and is arranged in line with the needle removal rod 33. The connecting rod 34 and the needle removal rod 33 can be connected by a nut. The elastic member 35 is a spring, which is sleeved on the connecting rod 34 and located between the adapter seat 22 and the needle removal sleeve 31. When the needle is removed, the needle removal sleeve 31 rises and the spring is compressed. When the needle is removed, the spring will have a downward elastic force on the needle removal sleeve 31 to assist in completing the needle removal, making the needle removal operation smoother.

[0040] Reference Figure 2 One embodiment of the sample loading arm mechanism further includes a fixed seat 11, the fixed seat 11 includes a top plate 112, a bottom plate 113 and a side plate 114 connecting the top plate 112 and the bottom plate 113, a mounting groove 111 is formed between the top plate 112 and the bottom plate 113, the driving member 13 is mounted on the top surface of the top plate 112, the liquid pump 12 is arranged in the mounting groove 111 and passes downward to the bottom surface of the bottom plate 113, the transmission member 14 and the needle removal plate 32 are both movably arranged in the mounting groove 111, and the adapter seat 22 is mounted below the fixed seat 11. Thus, the liquid suction and injection module, the needle removal module, the needle removal module and the driving module are connected into a whole through the fixed seat 11, so that the structure of the sample loading arm mechanism is more compact.

[0041] Furthermore, the transmission member 14 and the needle-removing plate 32 are both sleeved on the peripheral side of the liquid pump 12. A guide rod 15 connecting the top plate 112 and the bottom plate 113 is arranged in the mounting groove 111, and an avoidance hole for the guide rod 15 to pass through is opened on the transmission member 14 and the needle-removing plate 32. The guide rod 15 is inserted through the transmission member 14 and the needle-removing plate 32, and the transmission member 14 and the needle-removing plate 32 perform linear motion under the guidance of the guide plate.

[0042] Reference Figure 3 In order to ensure the sealing of the flow channel 221, a sealing member 222 such as an oil seal is provided at the connection between the flow channel 221 and the liquid pump 12 to avoid air leakage, thereby ensuring the liquid suction and injection functions of the liquid suction and injection module.

[0043] Reference Figure 4 A linear bearing 24 may be provided in the adapter seat 22, and the needle-removing rod 33 is provided through the linear bearing 24. The linear bearing 24 is sleeved on the needle-removing rod 33, so that the up and down movement of the needle-removing rod 33 is smoother.

[0044] An embodiment of the loading arm mechanism may further include a sensor, such as a photoelectric sensor or a distance sensor, etc. The sensor is at least partially mounted on the adapter seat 22 to detect whether the needle removal module has successfully removed the needle and / or detect whether the needle removal module has successfully removed the needle.

[0045] For example, refer to Figure 1 The sensor adopts a photoelectric sensor, including a photoelectric switch 41 and a baffle 42. The photoelectric switch 41 is installed on the adapter seat 22, and the baffle 42 is installed on the needle removal sleeve 31. The photoelectric switch 41 is provided with a U-shaped groove that allows the baffle 42 to be inserted. The baffle 42 is used to insert into the photoelectric switch 41 as the needle removal sleeve 31 rises, or to move away from the photoelectric switch 41 as the needle removal sleeve 31 descends. In the initial state, the needle removal sleeve 31 and the adapter seat 22 have an initial distance, and the baffle 42 is not inserted into the photoelectric switch 41. During the needle removal operation, the sample needle 23 pushes the needle removal sleeve 31 upward, and the baffle 42 also moves up and inserts into the U-shaped groove of the photoelectric switch 41, and the photoelectric switch 41 detects that the needle is removed successfully. During the needle removal operation, the transmission member 14 presses down the needle removal module, and the needle removal sleeve 31 drives the sample needle 23 to disengage from the adapter 21 during the downward movement. The baffle 42 also moves down with the needle removal sleeve 31, and then leaves the U-shaped groove of the photoelectric switch 41, and the photoelectric switch 41 detects that the needle is removed successfully. Alternatively, the sensor is a distance sensor, which is mounted on the adapter seat 22 and determines whether the needle is removed successfully and / or whether the needle is removed successfully by detecting the distance between the needle removal sleeve 31 and the adapter seat 22 .

[0046] The utility model also provides an analyzer, which includes an analysis mechanism and a sample loading arm mechanism. The specific structure of the sample loading arm mechanism refers to the above embodiment. Since the analyzer adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the sample loading arm mechanism is used to inject the absorbed solution into the analysis mechanism, and the analysis mechanism is used to detect the absorbed solution.

[0047] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sample loading arm mechanism, characterized in that: include: A liquid suction and injection module, wherein the liquid suction and injection module comprises a liquid extraction pump, wherein a piston is arranged in the liquid extraction pump; A needle removal module, the needle removal module comprising an adapter and an adapter seat, the adapter being liftably mounted below the adapter seat for connecting a sample addition needle, a flow channel being arranged in the adapter seat for connecting the liquid extraction pump and the adapter; A needle removal module, the needle removal module comprising a needle removal sleeve, the needle removal sleeve being sleeved on the adapter; A driving module, wherein the driving module comprises a driving member and a transmission member, wherein the transmission member is respectively connected to the piston and the needle sleeve by transmission.

2. The loading arm mechanism according to claim 1, characterized in that: The needle removal module also includes a needle removal plate and a needle removal rod. The needle removal plate is sleeved on the peripheral side of the liquid extraction pump and is located below the transmission member. The needle removal rod is penetrated through the adapter seat to connect the needle removal sleeve and the needle removal plate.

3. The loading arm mechanism according to claim 2, characterized in that: The needle removal module further comprises an elastic member, wherein the elastic member is arranged between the adapter seat and the needle removal sleeve, and the needle removal sleeve is adapted to extend and retract upward and downward by squeezing the elastic member.

4. The loading arm mechanism according to claim 3, characterized in that: The needle removal sleeve is connected to the needle removal rod through a connecting rod. The needle removal sleeve is sleeved on the connecting rod and can slide along the connecting rod. The elastic member is a spring. The spring is sleeved on the connecting rod and is located between the adapter seat and the needle removal sleeve.

5. The loading arm mechanism according to claim 2, characterized in that: The loading arm mechanism also includes a fixed seat, which includes a top plate, a bottom plate and a side plate connecting the top plate and the bottom plate, a mounting groove is formed between the top plate and the bottom plate, the driving member is installed on the top surface of the top plate, the liquid pump is arranged in the mounting groove and penetrates downward to the bottom surface of the bottom plate, and the transmission member and the needle removal plate can be lifted and lowered in the mounting groove.

6. The loading arm mechanism according to claim 5, characterized in that: The transmission member and the needle-removing plate are both sleeved on the peripheral side of the liquid extraction pump.

7. The loading arm mechanism according to claim 6, characterized in that: A guide rod connecting the top plate and the bottom plate is arranged in the mounting groove, and the guide rod is penetrated by the transmission member and the needle stripping plate. The transmission member and the needle stripping plate perform linear motion under the guidance of the guide plate.

8. The loading arm mechanism according to claim 1, characterized in that: A sealing member is provided at the connection between the flow channel and the liquid pump.

9. The loading arm mechanism according to claim 2, characterized in that: A linear bearing is arranged in the adapter seat, and the needle-removing rod is passed through the linear bearing.

10. An analyzer, characterized in that: It comprises an analysis mechanism and a sample loading arm mechanism as claimed in any one of claims 1 to 9, wherein the sample loading arm mechanism is used to inject the absorbed solution into the analysis mechanism, and the analysis mechanism is used to perform pre-treatment on the absorbed solution.

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