JP3808895B2 - Automatic analyzer - Google Patents

Description

The present invention relates to an automatic analyzer that automatically analyzes a sample.

  As shown in FIG. 14, the conventional automatic analyzer includes a sampler 100 in which a plurality of test tubes containing samples are arranged, and a first reagent container 101 and a second reagent container 101 arranged adjacent to the sampler 100. And the arm 103 for sucking a sample or reagent from the sampler 100, the first reagent chamber 101, and the second reagent chamber 102 and dispensing them into the reaction tube. Furthermore, a sampler cover 104 for sealing the sampler 100, a first reagent storage cover 105 for sealing the first reagent storage 101, and a second reagent storage cover 106 for sealing the second reagent storage 102 are provided. .

  Usually, the sample and the reagent in the sampler 100 are cooled or warmed so as to be constant at a predetermined temperature according to the characteristics of the sample and the reagent in order to prevent evaporation and ensure safety. . Therefore, regarding the sample, the sampler 100 and the sampler cover 104 are made to have a heat insulating function so that the inside of the sampler 100 is constant at a predetermined temperature.

  Further, as shown in FIG. 15, a sample disk 107 that holds a plurality of test tubes containing samples in a double concentric shape is provided inside the sampler 100. In order to distinguish the samples, numbers are assigned to the respective test tubes.

  By the way, in the biochemical automatic analyzer described above, when exchanging the sample and the reagent, the sampler cover 104 is removed and the upper surface of the sampler 100 is completely opened. For this reason, when exchanging a sample and a reagent, the problem that the temperature in the sampler 100 will change will arise. In such a case, it is necessary to reset the inside of the sampler 100 to a desired temperature again, which causes a problem that work efficiency is poor. Further, in the biochemical automatic analyzer described above, the sampler cover 104 has a structure that seals the inside of the sampler 100 by its own weight, and it is difficult to reliably seal the inside of the sampler 100, and the heat insulating effect is sufficient. There is also a problem that is not.

  In addition, in the biochemical automatic analyzer described above, when the sampler 100 is released, it is necessary to completely remove the sample cover 104 from the apparatus itself. For this reason, when removing the sampler cover 104, the sampler cover 104 may hit the sampling arm 103 or the like. Furthermore, since there is no place for the removed sampler cover 104, the sampler cover 104 has to be temporarily placed in a surrounding empty space or a surrounding table, which may cause an inadvertent accident.

  Accordingly, an object of the present invention is to provide an automatic analyzer that can reliably open and close a thermostatic chamber such as a sampler or a thermostatic chamber that keeps a reagent cold, and that can efficiently and automatically analyze a plurality of samples. It is said.

  In order to achieve the above object, the present invention takes the following measures.

  According to a first aspect of the present invention, there is provided a container for storing a sample or reagent, an arm for dispensing the sample or the reagent, a disk for arranging a plurality of the containers, and the container in the disk at a specific temperature. A constant temperature bath having an opening, and a fixed lid portion for closing the opening of the thermostatic bath, wherein the opening into which the arm enters is formed, and the fixed lid portion. Comprises a cover having a movable lid that can be opened and closed independently, a sensor for sensing the open / closed state of the movable lid, and stopping the measurement operation of the apparatus when the sensor senses the opening of the movable lid And an automatic analyzer having a control means.

  According to a second aspect of the present invention, there is provided a container for containing a sample or a reagent, an arm for dispensing the sample or the reagent, a disk for arranging a plurality of the containers, and the container in the disk at a specific temperature. A constant temperature bath having an opening, and a fixed lid portion for closing the opening of the thermostatic bath, wherein the opening into which the arm enters is formed, and the fixed lid portion. Comprises a movable lid that can be opened and closed independently, a sensor that senses the open / closed state of the movable lid, and stops the movement of the arm when the sensor senses the opening of the movable lid. And an automatic analyzer having a control means.

  According to the automatic analyzer according to the present invention, the thermostat can be reliably opened and closed, and a plurality of samples can be automatically and efficiently analyzed.

  Hereinafter, preferred embodiments of an automatic analyzer according to the present invention will be described in detail with reference to the drawings.

  In the present embodiment, as shown in FIG. 1, a biochemical automatic analyzer 1 that automatically performs component analysis of a sample such as serum or urine will be described as an example. In addition, this invention is not limited to the biochemical automatic analyzer 1 illustrated here, Of course, it is applied to various apparatuses in the range which does not deviate from the meaning of this invention.

  This automatic biochemical analyzer 1 includes a thermostatic chamber 2 in which a plurality of test tubes containing samples are disposed, and a first reagent storage 3 and a second reagent chamber disposed adjacent to the thermostatic chamber 2. Reagent chamber 4, reaction unit 5 disposed on the outer periphery of first reagent chamber 3, first dispensing arm 6 for dispensing the reagent in first reagent chamber 3, and second reagent chamber A second dispensing arm 7 for dispensing the reagent in 4 and a sampling arm 8 for dispensing the sample in the thermostat 2 are provided. In addition, the biochemical automatic analyzer 1 includes a sampler cover 9 disposed so as to substantially seal the thermostatic chamber 2.

  In the biochemical automatic analyzer 1, the thermostatic chamber 2 has a temperature adjustment function for maintaining the interior at a predetermined temperature, and can maintain the interior at a desired temperature. In addition, a sample disk 10 in which a plurality of test tubes as shown in FIG. In this sample disk 10, a plurality of holding portions 11 having an opening shape corresponding to the outer peripheral shape of the test tube are formed along the circumference. In particular, the holding portions 11 are arranged concentrically on the outer circumference and the inner circumference, and are arranged in a so-called staggered manner so that the outer circumference side and the inner circumference side do not overlap. The holding portions 11 are sequentially numbered in a zigzag manner. That is, when the predetermined holding portion 11a on the outer peripheral side is set to “1”, the holding portion 11b on the inner peripheral side adjacent to the holding portion 11a of “1” is set to “2”, and the holding portion of “2” is set. The holding parts 11c on the outer peripheral side adjacent to 11b are numbered in order so as to be “3”.

  Further, notches 12 reaching the holding portions 11 are formed on the side surfaces of the sample disk 10. For this reason, each holding part 11 is made visible through the notch 12 from the side surface direction of the sample disk 10.

  On the other hand, the thermostatic chamber 2 in which the sample disk 10 is accommodated can be substantially sealed with a sampler cover 9 as shown in FIG. The sampler cover 9 includes a fixed portion 13 that is fixedly attached to the thermostatic chamber 2 and a movable lid portion 14 that is disposed to be openable and closable with respect to the fixed portion 13. That is, in the sampler cover 9, the fixed portion 13 and the movable lid portion 14 are connected via the hinge 15.

  Further, a latch 16 for fixing the sampler cover 9 to the thermostat 2 is disposed on the outer peripheral surface of the fixing portion 13 of the sampler cover 9. The latch 16 may be formed at a plurality of locations of the fixing portion 13, and can be more reliably fixed by being formed at a plurality of locations. Further, the sampler cover 9 is provided with a hand-held portion 17 on the upper surface of the fixed portion 13 and an opening 18 so that the sampling arm 8 can enter. Furthermore, an engaging portion 19 for attaching to the thermostat 2 is formed on the fixing portion 13 of the sampler cover 9 on the opposite side of the latch 16.

  The sampler cover 9 configured as described above is formed of at least an inner peripheral side from a heat insulating material or an elastic material having good adhesion. Thereby, the inside of the thermostat 2 can be sealed with the sampler cover 9 attached to the thermostat 2 and can be maintained at a desired temperature. In other words, by forming at least the inner peripheral side of the sampler cover 9 from a heat insulating material or an elastic material having good adhesion, the sampler cover 9 can prevent the atmosphere inside the thermostatic chamber 2 from escaping to the outside and the outside. It is possible to prevent such an atmosphere from entering the interior.

  When attaching such a sampler cover 9 to the thermostat 2, first, as schematically shown in FIG. 4, the latch 16 is first engaged with the engaging claws 20 disposed on the side surface of the thermostat 2.

  Next, the engaging claw 21 disposed on the outer peripheral surface of the thermostatic chamber 2 is engaged with the engaging portion 19 of the fixing portion 13. Thereby, the fixing | fixed part 13 will be attached so that the thermostat 2 may be sealed reliably.

  In the sampler cover 9, it is preferable that the movable lid portion 14 can be stopped at a predetermined position with respect to the fixed portion 13. In other words, the movable lid portion 14 is preferably connected to the fixed portion 13 via a hinge 15 having a lock mechanism such as a free stop hinge. Through the hinge 15 having such a locking mechanism, the movable lid portion 14 can maintain a position at a predetermined angle with respect to the fixed portion 13 and moves in a direction to close the thermostatic chamber 2 with its own weight. This will be prevented.

  By the way, such a sampler cover 9 can be easily removed from the thermostat 2 by removing the latch 16 from the engagement claw 20 after removing the engagement claw 21. Specifically, first, after removing the engaging claw 21, the fixing portion 13 is rotated in the direction indicated by the arrow a in FIG. 5, and then the entire sampler cover 9 is moved in the direction indicated by the arrow b in FIG. Move to. Thus, the sampler cover 9 described above can be easily removed from the thermostatic chamber 2.

  In the biochemical automatic analyzer 1 configured as described above, the thermostatic chamber 2 is sealed by the sampler cover 9, and the interior of the thermostatic chamber 2 is maintained at a predetermined temperature. Then, from the opening 18 formed in the sampler cover 9, a test tube held by the sample disk 10 in the thermostatic chamber faces. For this reason, the sampling arm 8 is inserted into the opening 18 and the sample in the test tube facing the opening 18 can be sampled.

  The sample disk 10 is driven to rotate at a predetermined speed in the thermostatic chamber 2 because it is necessary to face the test tubes sequentially from the opening 18. At this time, the sample disk 10 has the holding portions 11 formed in a staggered manner as described above, and has a plurality of test tubes held by these holding portions 11.

  In this sample disk 10, the test tubes are held in a staggered manner, and the notches 12 are formed in the respective holding portions 11. Therefore, when using a test tube with a barcode attached, on the side of the sample disk 10. While the sample disk 10 makes one round by the arranged barcode reader, the barcodes of all the test tubes can be read in the order of the numbers attached to the holding unit 11.

  Further, in the biochemical automatic analyzer 1, when the test tube held on the sample disk 10 is replaced, the movable lid portion 14 of the sampler cover 9 is moved to release the inside of the thermostatic chamber 2. That is, in this biochemical automatic analyzer 1, since the test tube can be exchanged with the sampler cover 9 opened halfway, the change in the atmosphere in the thermostat 2 can be minimized. For this reason, according to this biochemical automatic analyzer 1, the temperature change in the thermostat 2 can be made small, the time from when the sampler cover 9 is closed until measurement can be performed can be shortened, and the inside of the thermostat The power consumption for maintaining the temperature at the condition temperature can be suppressed.

  In the biochemical automatic analyzer 1, when the test tube is exchanged or replenished, the sampler cover 9 is attached to the sample disk 10, so that the work can be performed. It is possible to prevent dangers such as hitting or dropping on a sample / reagent. Further, it is possible to prevent a danger that the place of the sampler cover 9 removed during the operation is troubled or the temporarily placed sampler cover 9 is inadvertently damaged.

  Furthermore, the sampler cover 9 can also be removed from the thermostat 2 by removing the sampler cover fixing portion 13 as described above as necessary. For this reason, when maintaining the thermostat 2 and the sample disk 10, it is excellent in operativity.

  In the biochemical automatic analyzer 1, the sampler cover 9 is connected to the fixed portion 13 and the movable lid portion 14 via the hinge 15 having the lock mechanism as described above. It can be stopped at a desired position. For this reason, when the movable lid portion 14 is manually rotated to release the inside of the thermostatic chamber 2, the movable lid portion 14 is prevented from rotating in the direction of closing the thermostatic chamber 2 with its own weight. The This biochemical automatic analyzer 1 has excellent safety in opening and closing operation of the thermostat 2 such as preventing the danger of the operator getting caught in the work, and the movable lid portion. An accident that 14 damages the sampling arm 8 or the like can be prevented.

  In the biochemical automatic analyzer, the test tubes held in the holding units (sample disks) may be replaced and replenished in the order of numbers (measurement order) given to the holding units as necessary. In the biochemical automatic analyzer 1, the sample disks 10 are sequentially numbered in a zigzag manner with respect to the holding portions 11 arranged in a zigzag manner as described above. For this reason, when the movable lid portion 14 is rotated to bring the thermostatic chamber 2 into a half-open state, and approximately half of the sample disk 10 is exposed to the outside, consecutive numbers are given as shown in FIG. The held part 11 is exposed. Specifically, in the sample disks 10 numbered sequentially from “1” to “24”, the holding portions 11 of “1” to “12” are exposed. Further, by rotating the sample disk 10 approximately half, the holding portions 11 of “13” to “24” are exposed as shown in FIG. 6B. In FIG. 6, the hatched portion on the sample disk 10 indicates a region that is covered with the fixing portion 13 and is not exposed to the outside.

  On the other hand, in the conventional sample disk 50 as shown in FIG. 7, the holding parts 51 arranged on the outer peripheral side are sequentially numbered, and the subsequent numbers are taken over by the holding parts 52 arranged on the inner peripheral side. They are numbered sequentially. Specifically, when this conventional sample disk 50 is used, “1” to “6” are exposed in the state shown in FIG. 8A, and then the sample disk 5 is rotated approximately half a turn, as shown in FIG. “7” to “12” are exposed in the state shown in FIG. Next, the sample disk 50 is again rotated approximately half a turn to expose “13” to “18” in the state shown in FIG. 8C, and then the sample disk 50 is further rotated approximately half a turn again so that FIG. "19" to "24" are exposed as shown in FIG.

  As described above, when the conventional sample disk 50 is used, if the holders 51 of “1” to “24” are to be exposed in order of numbers, the sample disk 50 needs to be rotated approximately twice. Therefore, when such a sample disk 50 is used, it becomes a very troublesome work when exchanging the test tubes in the order of the numbers given to the holding unit 51, and an exchange error is likely to occur.

  On the other hand, in the biochemical automatic analyzer 1, as shown in FIGS. 6 (a) and 6 (b), all the test tubes held in the holding unit 11 are removed by rotating the sample disk 10 almost once. It is possible to exchange sequentially in the order of the assigned numbers (or measurement order). As described above, the biochemical automatic analyzer 1 can easily recognize the position of the test tube to be replaced as compared with the case where the conventional sample disk 50 is used. Can be prevented, and the work efficiency is greatly improved.

  By the way, the biochemical automatic analyzer according to the present invention is not limited to the configuration having the sampler cover 9 as described above. That is, the biochemical automatic analyzer shown as another embodiment may be configured to have a sampler cover 25 that is fitted to the thermostat 2 as shown in FIGS. 9 and 10. .

  The sampler cover 25 has an inner diameter that is substantially the same as the outer diameter of the thermostatic chamber 2, and a movable lid portion 27 is rotatably arranged with respect to the fixed portion 26. Further, on the side surface of the sampler cover 25, an engaging convex portion 28 that engages with the engaging claw 21 of the thermostatic chamber 2 is formed.

  The sampler cover 25 configured in this way is fixed to the thermostat 2 by being fitted in the thermostat 2 and the engaging claws 21 engaging with the engaging projections 28. At this time, the sampler cover 25 has the fixing portion 26 fitted to the thermostatic chamber 2 at a predetermined depth, so that the thermostatic chamber 2 can be reliably sealed even without a fixing means for the movable lid portion 27 in particular. Can do. In other words, the sampler cover 25 can be easily removed from the thermostatic chamber 2 simply by removing the engaging claw 21 and lifting it upward.

  In such a sampler cover 25 as well, the movable lid 27 can be rotated so that the inside of the thermostatic chamber 2 can face outward. For this reason, even when this sampler cover 25 is used, the change of the atmosphere inside the thermostat 2 can be suppressed as much as possible. Further, since the test tube can be replaced or replenished without removing the sampler cover 25 as a whole, the workability is excellent.

  Further, the biochemical automatic analyzer 1 according to the present invention may have a configuration having a sampler cover 30 as shown in FIG. The sampler cover 30 is provided with a plurality of engaging projections 31 protruding in a rod shape on the inner peripheral surface. Further, the sampler cover 30 has an inner diameter that is substantially the same as the outer diameter of the thermostatic chamber 2, and a movable lid portion 33 is disposed so as to be rotatable with respect to the fixed portion 32. When this sampler cover 30 is used, a plurality of engagement grooves 34 that engage with the engagement protrusions 31 need to be formed on the outer peripheral surface of the thermostatic chamber 2.

  The sampler cover 30 configured in this way is positioned in the direction indicated by the arrow a in FIG. 11 with respect to the thermostat 2 after accurately positioning the engagement protrusion 31 and the engagement groove 34 of the thermostat 2. Stuff. Thereafter, the sampler cover 30 is rotated in the direction indicated by the arrow b in FIG.

  Since the sampler cover 30 is securely attached to the thermostat 2 by the engagement protrusion 31 and the engagement groove 34 engaging with each other, no other fixing means is particularly required. For this reason, the sampler cover 30 has a relatively simple structure and improved operability.

  In such a sampler cover 30 as well, the movable lid 33 can be rotated to allow the inside of the thermostatic chamber 2 to face outward. For this reason, also when this sampler cover 30 is used, the change of the atmosphere inside the thermostat 2 can be suppressed as much as possible. In addition, since the test tube can be replaced and replenished without removing the entire sampler cover 30, the workability is excellent.

  Furthermore, the biochemical automatic analyzer 1 according to the present invention may have a configuration having a sampler cover 40 as shown in FIG. The sampler cover 40 has a configuration in which a portion 41 a in contact with the thermostatic chamber 2 in the fixed portion 41 is made of a magnetic material, and a movable lid portion 42 is rotatably connected to the fixed portion 41. When this sampler cover 40 is used, it is preferable that the portion 43 in contact with the fixed portion 41 in the thermostatic chamber 2 is also made of a magnetic material.

  In the biochemical automatic analyzer 1 configured as described above, the fixed portion 41 and the thermostat 2 are brought into close contact with each other by magnetic force, and the sampler cover 40 is attached to the thermostat. In this case, simply by placing the sampler cover 40 on the thermostat 2, the fixing part 41 can be reliably fixed, and simplification of the sampler cover 40 can be achieved.

  Also in such a sampler cover 40, the movable lid portion 42 can be rotated so that the inside of the thermostatic chamber 2 can face outward. For this reason, also when this sampler cover 40 is used, the change of the atmosphere inside the thermostat 2 can be suppressed as much as possible. Further, since the test tube can be replaced or replenished without removing the entire sampler cover 40, the workability is excellent.

  Furthermore, the biochemical automatic analyzer 1 according to the present invention may have a configuration having a sampler cover 60 as shown in FIG. The sampler cover 60 includes a fixed portion 61 that is fixedly attached to the thermostatic chamber 2 and a movable lid portion 62 that is arranged to be openable and closable with respect to the fixed portion 61.

  On the outer periphery of the fixing portion 61, a latch 63 for fixing the thermostat 2 is provided. There may be a plurality of latches 63 on the outer periphery of the fixing portion 61. By engaging the latch 63 with the engaging portion 20 disposed on the side surface of the thermostat 2, the fixing portion 61 is fixed to the thermostat 2.

  When opening the movable lid 62, the locking of the engaging portion and the weight of the fixing portion 61 suppress the lifting of the fixing portion 61. When the movable lid portion 62 is closed, the engaging claw 21 disposed on the outer peripheral surface of the thermostatic chamber 2 engages with the engaging portion 64 at the distal end portion of the movable lid portion 62. Thereby, both the fixed part 61 and the movable lid part 62 are attached so as to securely seal the thermostatic chamber 2.

  Also in such a sampler cover 60, the movable lid 62 can be moved so that the inside of the thermostatic chamber 2 can be exposed to the outside. For this reason, even when this sampler cover 60 is used, the change of the atmosphere inside the thermostat 2 can be suppressed as much as possible. In addition, since the test tube can be replaced or replenished without removing the entire sampler cover 60, the workability is excellent.

  By the way, in the present invention, the fixing means between the fixing portion of the sampler cover and the thermostatic bath is not limited to the above-described one, and uses fixing means such as screws, Velcro (registered trademark), hooks and the like. May be. Moreover, these sample fixing means can also remove all sampler covers by making it possible to release the fixing means as required. For example, if a method of releasing a hook by pushing a push button as a fixing means is adopted, the entire sampler cover can be easily removed without using a tool.

  Moreover, it is preferable that the automatic analyzer of this invention is equipped with the sensor which judges the opening / closing state of a movable cover part in the sampler cover side or the thermostat side. In this case, when the movable lid is open and the thermostatic chamber is exposed to the outside, the sensor senses the opening of the movable lid and the measurement operation of the biochemical automatic analyzer 1 is stopped. Is done.

  That is, the movement of the sample disk, arm, and test chamber is controlled to stop. If the movable lid is opened for replacement while reading the barcode attached to the test tube held in the thermostat, the sensor detects the opening of the movable lid and reads the barcode. Controlled to stop. Then, after the sensor senses that the movable lid portion is closed, reading is continued from the time when reading of the barcode is stopped, or reading is performed again from the beginning. As a result, the automatic analyzer can reliably prevent malfunctions and has improved reliability.

  Finally, the above-described embodiment is only an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment. For example, in the description of the above-described embodiment, the description has been limited to the constant temperature bath of the sample, but the same can be applied to a constant temperature bath that keeps the reagent cold. In addition to this, it is a matter of course that various modifications can be made in accordance with, for example, the design as long as the technical idea of the present invention is not deviated.

  In the automatic analyzer according to the present invention, the thermostat can be reliably opened and closed, and a plurality of samples can be automatically and efficiently analyzed.

It is a schematic perspective view which shows the structure of the biochemical automatic analyzer which becomes embodiment which applied the automatic analyzer which concerns on this invention. It is a top view of a sample disk. It is a perspective view of a sampler cover. It is a disassembled perspective view which shows typically the state which mounts a sampler cover to a thermostat. It is a side view which shows typically the state which mounted | wore the thermostat with the sampler cover. It is a top view which shows typically the sample disc which faces in the state which opened the movable cover part, (a) is a top view which shows typically the state which the holding | maintenance part of "1"-"12" faces, (b ) Is a plan view schematically showing a state in which the sample disk is rotated approximately half from the state of (a). It is a top view of the sample disk used for the conventional biochemical automatic analyzer. It is a top view which shows typically the said sample disc which faces using the sample disc shown in FIG. 7 in the state which opened the movable cover part. It is a disassembled perspective view which shows typically the sampler cover used for the biochemical automatic analyzer shown as other embodiment. It is a side view which shows the state which mounted | wore the thermostat with the sampler cover shown in FIG. It is a disassembled perspective view which shows typically the sampler cover used for the biochemical automatic analyzer shown as other embodiment. It is a disassembled perspective view which shows typically the sampler cover used for the biochemical automatic analyzer shown as other embodiment. Furthermore, it is a disassembled perspective view which shows typically the sampler cover used for the automatic analyzer shown as other embodiment. It is a disassembled perspective view of the conventional biochemical automatic analyzer. It is a top view which shows an example of the sample disc used for the conventional biochemical automatic analyzer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Biochemical automatic analyzer, 2 ... Constant temperature bath, 3 ... 1st reagent storage, 4 ... 2nd reagent storage, 5 ... Reaction part, 9 ... Sampler cover, 10 ... Sample disk, 11 ... Holding part, 12 ... notch, 13 ... fixed part, 14 ... movable lid part

Claims (4)

  A container containing a sample or reagent;
  An arm for dispensing the sample or the reagent;
  A disk for arranging a plurality of the containers;
  For maintaining the container in the disk at a specific temperature, a thermostatic bath having an opening,
  A cover for closing the opening of the thermostatic chamber, comprising: a fixed lid portion formed with an opening into which the arm enters; and a movable lid portion that can be opened and closed independently of the fixed lid portion; ,
  A sensor for detecting an open / closed state of the movable lid,
  Means for controlling the measurement operation of the apparatus to stop when the sensor detects the opening of the movable lid portion;
  An automatic analyzer characterized by comprising:   The automatic analyzer according to claim 1, wherein the movable lid portion is configured to be semi-openable with respect to the fixed lid portion.   The automatic analyzer according to claim 1, wherein a hand-held portion is disposed on an upper surface of the lid.   A container containing a sample or reagent;
  An arm for dispensing the sample or the reagent;
  A disk for arranging a plurality of the containers;
  For maintaining the container in the disk at a specific temperature, a thermostatic bath having an opening,
  A cover for closing the opening of the thermostatic chamber, comprising: a fixed lid portion formed with an opening into which the arm enters; and a movable lid portion that can be opened and closed independently of the fixed lid portion; ,
  A sensor for detecting an open / closed state of the movable lid,
  Means for controlling the movement of the arm to stop when the sensor detects the opening of the movable lid;
  An automatic analyzer characterized by comprising:

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