Three-temperature test sorting machine

Abstract

The utility model relates to a three-temperature testing and sorting machine, which is provided with a testing area and a discharging area, and comprises a testing device which comprises a testing mechanism and a testing plate, the testing mechanism is provided with a sealing cavity, the testing plate is arranged in the sealing cavity, the testing mechanism comprises a testing seat, and the testing seat is electrically connected with the testing plate through a probe; the pressure head device is arranged in the test area and is used for pressing the tested piece into the test seat to be electrically connected with the test plate; the magnetic unit is arranged in the sealing cavity and is used for providing a magnetic field environment for the tested piece; the carrying device is used for transporting the tested piece to be tested from the testing area to the discharging area; a blocking piece is arranged between the testing area and the discharging area, the blocking piece is connected with the testing mechanism and provided with an avoiding groove used for avoiding the carrying device, and the blocking piece is used for blocking airflow in the discharging area from flowing to the testing area. The blocking piece can block the airflow of the discharging area from flowing to the testing area, so that the airflow of the discharging area is prevented from flowing to the testing area to influence the dew point of the testing area, the surface of the tested piece is prevented from frosting, and the accuracy of a testing result is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a three-temperature testing and sorting machine. Background Art

[0002] With the continuous development of science and technology, the application of electronic components (such as IC) is becoming more and more extensive. Before leaving the factory, electronic components must undergo performance testing to ensure that their quality meets the standards. Among them, the three-temperature test sorting machine is widely used in the testing field because it can provide three test environments: low temperature, normal temperature and high temperature.

[0003] When the three-temperature test sorting machine performs low-temperature tests on electronic components, the test board electrically connected to the electronic components needs to be placed in a closed environment to prevent frost on the surface of the test board under low-temperature conditions and affect the test results of the electronic components. During low-temperature testing, in addition to the adverse effects of frost on the test board, frost on the surface of the electronic components will also have an adverse effect on the test results.

[0004] In traditional technology, due to the lack of necessary shielding measures, airflow from other areas is easy to flow to the test area, causing its dew point to increase. The increase in dew point can easily cause frost on the surface of electronic components in the test area and affect the test results. Utility Model Content

[0005] Based on this, it is necessary to provide a three-temperature test sorting machine that can improve the above problems.

[0006] A three-temperature test sorting machine, having a test area and a discharging area, comprises:

[0007] A test device, comprising a test mechanism and a test board, wherein the test mechanism has a sealed cavity, the test board is arranged in the sealed cavity, the test mechanism comprises a test seat, and the test seat is electrically connected to the test board through a probe;

[0008] A pressing head device, arranged in the test area, for pressing the tested piece into the test seat and electrically connecting it to the test board;

[0009] A magnetic unit, disposed in the sealed cavity, for providing a magnetic field environment to the measured object;

[0010] A transport device, the transport device is used to transport the tested piece from the testing area to the discharging area;

[0011] Wherein, a barrier is provided between the test area and the discharge area, the barrier is connected to the test mechanism and is provided with an avoidance groove for avoiding the carrier, and the barrier is used to block the airflow from the discharge area from flowing to the test area.

[0012] In the above three-temperature test sorting machine, the test plate is arranged in a sealed chamber, so that the external airflow can be prevented from contacting the test plate, thereby preventing frost on the surface of the test plate and ensuring the test effect. At the same time, the barrier can block the airflow from the discharge area to the test area, thus preventing the airflow from the discharge area from flowing to the test area and affecting its dew point, preventing frost on the surface of the tested piece, and thus ensuring the accuracy of the test results.

[0013] In one of the embodiments, the three-temperature testing and sorting machine further includes an opening and closing door, which is installed on the barrier member to open or close the avoidance slot.

[0014] In one embodiment, the test mechanism further includes a panel, a mounting seat and an anti-frost cover, the panel is provided with a mounting groove in the thickness direction, the mounting seat is mounted in the mounting groove, the test seat is mounted on the mounting seat, and the anti-frost cover is mounted on one side of the panel in the thickness direction; the panel, the mounting seat, the test seat and the anti-frost cover define and form the sealed cavity;

[0015] The other side of the panel in the thickness direction facing away from the anti-frost cover forms the testing area and the discharging area, and the blocking member is protrudingly arranged on the side of the panel facing away from the anti-frost cover.

[0016] In one of the embodiments, the three-temperature test sorting machine also includes a driving device disposed in the sealed cavity, the magnetic unit is connected to the driving device, and the driving device is used to drive the magnetic unit to rotate so that the magnetic unit provides a changing magnetic field environment to the test piece.

[0017] In one embodiment,

[0018] The number of the magnetic units is equal to the number of the test sockets and they are arranged in one-to-one correspondence, and the correspondingly arranged test sockets and the magnetic units are respectively located on two opposite sides of the test board; each of the magnetic units is used to provide a magnetic field environment to the test piece of the corresponding test socket; or

[0019] The number of the magnetic units is not equal to the number of the test sockets.

[0020] In one of the embodiments, the three-temperature test sorter includes at least two of the magnetic units;

[0021] The three-temperature test sorting machine also includes a magnetic isolation component, which is used to isolate the magnetic transmission between the magnetic units.

[0022] In one of the embodiments, the three-temperature test sorting machine also includes an adjusting device, the magnetic unit is connected to the adjusting device, and the adjusting device is used to adjust the distance between the magnetic unit and the test plate in the thickness direction of the test plate, thereby changing the magnetic field strength provided by the magnetic unit to the test piece.

[0023] In one of the embodiments, the adjustment device is disposed in the sealed cavity and includes an adjustment plate, which is connected to the testing mechanism; the position of at least one of the magnetic unit and the testing mechanism and the adjustment plate in the thickness direction is adjustable to adjust the distance between the magnetic unit and the testing plate.

[0024] In one of the embodiments, the adjusting device comprises a driving mechanism, and the driving mechanism is used to drive the magnetic unit to move along the thickness direction of the test plate to adjust the distance between the magnetic unit and the test plate.

[0025] In one embodiment, the test mechanism includes a body and a support plate, the body includes the test seat, the test plate is mounted on the body, the support plate is connected to the driving mechanism, and the magnetic unit is arranged on the support plate;

[0026] The testing mechanism further comprises a sealing member, the body having an opening, and the sealing member is disposed on at least one of the body and the support plate;

[0027] The driving mechanism can drive the support plate to move along the thickness direction so as to switch between a first state and a second state; when the support plate is in the first state, the magnetic unit can extend into the body through the opening, and the sealing member is compressed between the support plate and the body to seal the opening, and the body, the sealing member and the support plate define and form the sealed cavity; when the support plate is in the second state, the magnetic unit can extend out of the body through the opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An axonometric diagram of a three-temperature test sorting machine provided in one embodiment of the present application;

[0029] Figure 2 for Figure 1 A cross-sectional view of a partial structure of a three-temperature test sorting machine shown in FIG.

[0030] Figure 3 for Figure 1 An axonometric view of the partial structure of the three-temperature test sorting machine shown in;

[0031] Figure 4 for Figure 3 A partial structural diagram of the structure described in;

[0032] Figure 5 A partial structural diagram of a three-temperature test sorting machine provided in yet another embodiment of the present application;

[0033] Figure 6 for Figure 4 A partial structural diagram of the structure shown in;

[0034] Figure 7 for Figure 6 An exploded view of a partial structure of the structure shown in;

[0035] Figure 8 An axonometric diagram of a partial structure of a three-temperature test sorting machine provided in yet another embodiment of the present application;

[0036] Fig. 9 for Figure 8 A partial structural diagram of the structure shown in;

[0037] Fig.10 for Fig. 9 An exploded view of a partial structure of the structure shown in;

[0038] Fig.11 An axonometric diagram of a three-temperature test sorting machine provided in another embodiment of the present application;

[0039] Fig.12 for Fig.11 A partial view of the three-temperature test sorting machine shown in;

[0040] Fig.13 for Fig.11 Axonometric view of a partial structure of the structure shown in;

[0041] Fig.14 for Fig.13 Axonometric drawing of another perspective of the structure shown in;

[0042] Fig.15 for Fig.11 An exploded view of the local structure of the three-temperature test sorting machine shown in FIG.

[0043] Fig.16 for Fig.14 A magnified view of the structure shown in FIG.

[0044] Fig.17 for Fig.11 An axonometric view of the support plate of the structure shown in FIG. 1 when it is in a first state;

[0045] Fig.18 for Fig.17 Axonometric view of another perspective of the structure shown in .

[0046] Description of reference numerals:

[0047] 100. Three-temperature test sorting machine; A. test area; B. discharge area; 10. test device; 11. test mechanism; 111. test seat; 112. sealing chamber; 113. panel; 1131. mounting slot; 114. mounting seat; 115. frost cover; 1151. support plate; 1152. connecting plate; 1153. support plate; 1154. support rib; 116. seal; 1161. sealing strip; 117. opening 118, mounting block; 12, test plate; 20, pressure head device; 30, magnetic unit; 40, carrier; 50, barrier; 51, avoidance groove; 60, opening and closing door; 70, drive device; 71, first drive member; 72, first transmission assembly; 721, driving wheel; 722, first synchronous belt; 723, driven wheel assembly; 7231, rotating shaft; 7232, driven wheel; 73, tension wheel; 80, Magnetic isolation member; 90, support seat; 110, heat insulation board; 120, baffle; 130, sensor; 141, adjustment plate; 1411, first waist-shaped hole; 142, adapter plate; 143, driving mechanism; 1431, second driving member; 1432, lead screw; 1433, nut; 144, frame; 145, second transmission assembly; 1451, pulley; 1452, second synchronous belt; 1461, first mounting plate; 1462, second mounting plate; 147, slider; 148, guide rail; 149, first sensing member; 1410, first matching member; 1420, first limiting portion; 1430, first matching portion; 1440, second sensing member; 1450, second matching member; 1460, second limiting portion; 1470, second matching portion; 1480, caster; 150, guide mechanism; 151, linear bearing; 160, fixed seat. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0054] See also Figure 1 , one embodiment of the present application provides a three-temperature test sorting machine 100, which can control the temperature of the device under test within a preset range, and test its performance when the temperature of the device under test is within the preset range. Generally, the three-temperature test sorting machine 100 can provide a low-temperature environment, a normal temperature environment, and a high-temperature environment to the device under test to test the performance of the device under test in the low-temperature environment, the normal temperature environment, and the high-temperature environment. In some embodiments, the device under test is a magnetic chip (magnetic IC), and the three-temperature test sorting machine 100 can control the temperature of the magnetic chip and provide a magnetic field environment to the magnetic chip to test the performance of the magnetic IC. It is conceivable that in other embodiments, there is no limitation on the type of the device under test.

[0055] The three-temperature test sorting machine 100 has a test area A and a discharge area B. When the test piece is in the test area A, the three-temperature test sorting machine 100 can control its temperature and perform performance tests on it. When the test piece is in the discharge area B, the test piece can be classified and placed in the corresponding material tray or directly loaded and unloaded from the three-temperature test sorting machine 100.

[0056] See also Figure 1 and Figure 2 The three-temperature test sorting machine 100 includes a test device 10, and the test device 10 includes a test mechanism 11 and a test board 12. The test mechanism 11 includes a test seat 111, and the test seat 111 is electrically connected to the test board 12 through a probe. Specifically, the test board 12 is a PCB board. The three-temperature test sorting machine 100 also includes a pressure head device 20 arranged in the test area A, and the test seat 111 is arranged corresponding to the test area A. The pressure head device 20 is used to press the test piece into the test seat 111 to be electrically connected to the test board 12. Generally, a flow channel is provided in the pressure head device 20, and the flow channel is connected to the refrigeration system. The refrigeration system can provide a refrigerant into the flow channel, and the refrigerant can reduce the temperature of the pressure head device 20 when it flows in the flow channel. At the same time, a heating system is provided on the pressure head device 20, and the heating system can heat the pressure head device 20. Through the cold and heat confrontation between the refrigeration system and the heating system, the pressure head device 20 contacts the test piece and can control the temperature of the test piece. After the device under test is electrically connected to the test board 12 , a test machine electrically connected to the test board 12 tests the performance of the device under test.

[0057] When the device under test is subjected to a low temperature test, the test board 12 is in a low temperature environment due to being electrically connected to the device under test. Further, the test mechanism 11 has a sealed cavity 112, and the test board 12 is arranged in the sealed cavity 112. In this way, it is possible to prevent the external airflow from contacting the test board 12, thereby preventing frost on the surface of the test board 12 and ensuring the test effect. Figure 1-Figure 4 The three-temperature test sorting machine 100 also includes a magnetic unit 30, which is arranged in the sealed cavity 112 and is used to provide a magnetic field environment to the test piece electrically connected to the test board 12, so as to facilitate the performance test of the test piece in the magnetic field environment. In this way, it is avoided to arrange the magnetic unit 30 on the pressure head device 20, and the volume of the pressure head device 20 is reduced. At the same time, the magnetic unit 30 is arranged in the sealed cavity 112, which will not cause the external airflow to contact the test board 12, and avoid frost on the surface of the test board 12.

[0058] Continue reading Figure 1 The three-temperature test sorting machine 100 further includes a carrier 40, which is used to transport the tested piece from the test area A to the discharge area B. Specifically, the pressure head device 20 absorbs the tested piece by adsorption and presses it into the test seat 111 for testing. When the test of the tested piece is completed, the pressure head device 20 drives the tested piece away from the test seat 111, and then the pressure head device 20 releases the tested piece, and the tested piece falls on the carrier 40, and the carrier 40 transports the tested piece from the test area A to the discharge area B.

[0059] The three-temperature test sorting machine 100 further includes a barrier 50, which is connected to the test mechanism 11 and is provided with an avoidance groove 51, which connects the test area A and the discharge area B, and the carrier 40 can transport the test piece to the discharge area B through the test area A. The barrier 50 is used to block the airflow from the discharge area B from flowing to the test area A. Since the barrier 50 can block the airflow from the discharge area B from flowing to the test area A, the airflow from the discharge area B is prevented from flowing to the test area A and affecting its dew point, thereby preventing the test piece from frosting on the surface due to the lowering of the dew point of the test area A, thereby ensuring the accuracy of the test results.

[0060] It should be noted that in order to lower the dew point of the test area A, dry gas is often passed into the test area A. That is, the test piece is surrounded by dry gas, and the dry gas can make the dew point of the test area A lower, so as to avoid frost on the surface of the test piece during low temperature testing. It should also be noted that the avoidance groove 51 can be a hole structure opened on the barrier 50, and can be a groove structure with an opening 117.

[0061] In some embodiments, see Figure 2The test mechanism 11 also includes a panel 113, a mounting seat 114 and an anti-frost cover 115. The panel 113 is provided with a mounting groove 1131 in the thickness direction, the mounting seat 114 is mounted on the mounting groove 1131, the test seat 111 is mounted on the mounting seat 114, and the anti-frost cover 115 is mounted on one side of the panel 113 in the thickness direction. The panel 113, the mounting seat 114, the test seat 111 and the anti-frost cover 115 define a sealed cavity 112. The other side of the panel 113 in the thickness direction facing away from the anti-frost cover 115 forms a test area A and a discharge area B, and the barrier 50 is convexly arranged on the side of the panel 113 facing away from the anti-frost cover 115. Among them, the pressure head device 20 and the barrier 50 are located on the same side of the panel 113, and the pressure head device 20 can move relative to the panel 113 in the thickness direction of the panel 113 to press the test piece into the test seat 111 or pull it out from the test seat 111.

[0062] It is conceivable that in other embodiments, the testing mechanism 11 may also be arranged in other ways, which are not limited here.

[0063] In some embodiments, the carrier 40 is a shuttle. A track extending from the test area A to the discharge area B is provided on the panel 113. The shuttle is provided on the track and moves between the test area A and the discharge area B under the guidance of the track to transport the tested piece to the discharge area B through the test area A, or to move to the test area A through the discharge area B to obtain the tested piece. It is conceivable that in other embodiments, the type of the carrier 40 is not limited, as long as it can transport the tested piece from the test area A to the discharge area B through the avoidance slot 51.

[0064] Optionally, the three-temperature test sorting machine 100 has at least two carriers 40, and the barrier 50 is provided with avoidance slots 51 equal in number to the carriers 40, and each avoidance slot 51 is used to avoid the corresponding carrier 40. In this way, the carrying efficiency of the tested parts can be improved.

[0065] See also Figure 5 The three-temperature test sorting machine 100 further includes an opening and closing door 60, which is installed on the barrier 50 to open or close the avoidance slot 51. In this way, when the carrier 40 shuttles between the test area A and the discharge area B, the opening and closing door 60 is operated to close the avoidance slot 51, and the test area A and the discharge area B will no longer be connected. The barrier 50 can completely block the airflow from the discharge area B to the test area A. When the carrier 40 needs to move between the test area A and the discharge area B, the opening and closing door 60 is operated to open the avoidance slot 51, and the opening and closing door 60 will not interfere with the movement of the carrier 40.

[0066] In some specific embodiments, the opening and closing door 60 is a manual door. In other specific embodiments, the opening and closing door 60 can also be opened and closed automatically, such as by driving the opening and closing door 60 to move through a cylinder to control the opening and closing door 60 to open or close the avoidance slot 51.

[0067] Optionally, when a plurality of avoidance grooves 51 are provided on the barrier 50, an opening and closing door 60 is correspondingly provided for one avoidance groove 51, and the opening and closing door 60 can control the opening and closing of all avoidance grooves 51. Of course, in other embodiments, when a plurality of avoidance grooves 51 are provided on the barrier 50, an opening and closing door 60 is correspondingly provided for one avoidance groove 51, and one opening and closing door 60 controls the opening and closing of the corresponding avoidance groove 51, which is flexible and convenient.

[0068] In some embodiments, see Figure 1 The three-temperature test sorting machine 100 further includes a driving device 70 disposed in the sealed chamber 112, and the magnetic unit 30 is connected to the driving device 70. The driving device 70 is used to drive the magnetic unit 30 to rotate so that the magnetic unit 30 provides a changing magnetic field environment to the test piece. Specifically, the magnetic unit 30 rotates around an axis, and the axis is perpendicular to the plane where the test plate 12 is located.

[0069] Since the driving device 70 can drive the magnetic unit 30 to rotate, the rotating magnetic unit 30 can provide a changing magnetic field environment to the tested object, so the performance of the tested object in the changing magnetic field environment can be tested. At the same time, the driving device 70 is arranged in the sealed cavity 112, so that the external airflow will not contact the test board 12, thereby avoiding frost on the surface of the test board 12.

[0070] The magnetic unit 30 is a magnet, and when the driving device 70 drives the magnet to rotate, it can provide a changing magnetic field environment to the tested object. Of course, in some other embodiments, the magnetic unit 30 can also be prepared and formed by other materials that can generate magnetism, which is not limited here.

[0071] It is conceivable that in some other embodiments, the three-temperature test sorting machine 100 may also omit the driving device 70. If the magnetic unit 30 is a coil, passing alternating current through the coil may also provide a changing magnetic field environment to the test piece.

[0072] In some embodiments, see Figure 2 and Figure 3 The testing mechanism 11 includes at least two testing seats 111, and each testing seat 111 is used to carry a device under test.

[0073] See also Figure 4The three-temperature sorting test machine includes magnetic units 30 that are equal in number to and correspond to the test sockets 111. The corresponding test sockets 111 and the magnetic units 30 are respectively located on opposite sides of the test plate 12 in the thickness direction. Each magnetic unit 30 is used to provide a magnetic field environment to the test piece in the corresponding test socket 111. In some specific embodiments, the test mechanism 11 includes at least two test sockets 111, and the number of magnetic units 30 is also at least two. In other specific embodiments, the test device 10 can also be configured to include a test socket 111, and the number of magnetic elements 30 is one. In this way, compared to the method in which all the test pieces share one magnetic unit 30 or multiple magnetic units 30 jointly provide a magnetic field environment to a test piece, each test piece is provided with a corresponding magnetic unit 30 to ensure that the magnetic unit 30 provides a suitable magnetic field environment to the test piece.

[0074] In other embodiments, the number of magnetic elements 30 may be different from the number of test sockets 111. In this case, one magnetic unit 30 may correspond to multiple test sockets 111, or one test socket 111 may correspond to multiple magnetic units 30, or multiple magnetic units 30 may correspond to multiple test sockets 111.

[0075] In some other embodiments, the number of magnetic units 30 may be equal to the number of test sockets 111, but the magnetic units 30 and the test sockets 111 are not arranged one-to-one. For example, one magnetic unit 30 may correspond to one test socket 111, and one test socket 111 may correspond to multiple magnetic units 30.

[0076] See also Figure 6 In order to avoid the influence between the magnetic units 30, the three-temperature test sorting machine 100 also includes a magnetic isolation member 80, which is made of a magnetic isolation material and is used to isolate the magnetism between the magnetic units 30 to prevent the magnetic fields generated by adjacent magnetic units 30 from interfering with each other and affecting the test results. The three-temperature test sorting machine 100 also includes a support seat 90, on which the drive device 70, the magnetic unit 30 and the magnetic isolation member 80 are all installed.

[0077] In some specific embodiments, the support seat 90 is a flat plate structure, the magnetic shielding member 80 is arranged in parallel with the support seat 90, and a plurality of holes are provided on the magnetic shielding member 80 in a direction perpendicular to the plane where the support seat 90 is located, and the number of holes is equal to the number of magnetic units 30. The magnetic shielding member 80 is respectively mounted outside the plurality of magnetic units 30 through the plurality of holes to prevent magnetic transmission between the magnetic units 30. In other specific embodiments, the magnetic shielding member 80 includes a plurality of magnetic shielding plates, which are arranged between the magnetic units 30 to isolate the magnetism between the magnetic units 30.

[0078] In one embodiment, the driving device 70 includes a first driving member 71 and a first transmission assembly 72 mounted on a support seat 90. The number of the first driving member 71 is one, and one first driving member 71 is connected to a plurality of magnetic units 30 through the first transmission assembly 72, and drives all the magnetic units 30 to rotate synchronously through the first transmission assembly 72. At this time, all the magnetic units 30 can rotate synchronously under the action of the same first driving member 71, so as to provide a magnetic field environment to the tested object at the same time. For example, in a specific embodiment, the three-temperature test sorting machine 100 includes 8 magnetic units 30, and the 8 magnetic units 30 are arranged in two rows, each row having 4 magnetic units 30, and at this time, one first driving member 71 can drive the 8 magnetic units 30 to rotate synchronously. It can be imagined that in other specific embodiments, the number of magnetic units 30 is not limited, such as the three-temperature test sorting machine 100 can also include 2, 3, 4, 5, 6, 7 and more than 8 magnetic units 30.

[0079] It should be noted that, when the three-temperature test sorting machine 100 includes only one magnetic unit 30 , one first driving member 71 drives one magnetic unit 30 to rotate.

[0080] Furthermore, the first transmission assembly 72 includes a driving wheel 721, a first synchronous belt 722 and a driven wheel assembly 723. The driving wheel 721 is connected to the first driving member 71, the driven wheel assembly 723 is installed on the support seat 90, each magnetic unit 30 is connected to a driven wheel assembly 723, and the first synchronous belt 722 is sleeved outside the driving wheel 721 and all the driven wheel assemblies 723. In this way, when the first driving member 71 drives the driving wheel 721 to rotate, all the driven wheel assemblies 723 rotate synchronously under the action of the first synchronous belt 722, thereby driving all the magnetic units 30 to rotate synchronously. The first driving member 71 can be a motor or a rotary cylinder, etc.

[0081] See also Figure 7 The driven wheel assembly 723 includes a rotating shaft 7231 and a driven wheel 7232. The rotating shaft 7231 is connected to the support seat 90 through a first bearing, and the driven wheel 7232 is sleeved outside the rotating shaft 7231. The rotating shaft 7231 rotates relative to the support seat 90 through the first bearing, thereby driving the driven wheel 7232 to rotate. The three-temperature test sorting machine 100 also includes a fixed seat 160, which is fixedly connected to the rotating shaft 7231 by a top screw, and the magnetic unit 30 is nested on the fixed seat 160.

[0082] In some other embodiments, the first transmission assembly 72 may also be configured in other ways, such as providing the first transmission assembly 72 to include a driving gear and a driven gear, wherein the driving gear is connected to the first driving member 71, each driven gear is connected to a magnetic unit 30, and all driven gears are meshed with the driving gear. The first driving member 71 drives the driving gear to rotate, the driven gear rotates with the rotation of the driving gear, and the magnetic unit 30 rotates synchronously with the driven gear.

[0083] Further reading Figure 6 The driving device 70 further includes a tensioning wheel 73, which is used to tension the first synchronous belt 722 so that the first synchronous belt 722 drives the driven wheel assembly 723 to rotate under a suitable tensioning force.

[0084] In some other embodiments, see Figure 8 and Fig. 9 There are at least two magnetic units 30, and the driving device 70 includes at least two first driving members 71, each of which is used to drive a magnetic unit 30 to rotate. In this way, each first driving member 71 can independently drive the magnetic unit 30 corresponding thereto, so that the magnetic unit 30 can be independently controlled.

[0085] In some embodiments, see Fig.10 In order to prevent the first driving member 71 from overheating and failing, the first driving member 71 is disposed on the side of the support seat 90 facing away from the test board 12, and a heat insulation board 110 is disposed between the first driving member 71 and the support seat 90. The driving end of the first driving member 71 is penetrated through the support seat 90, the fixing seat 160 is disposed on the side of the support seat 90 facing the test board 12 and connected to the driving end of the first driving member 71, and the magnetic unit 30 is mounted on the fixing seat 160.

[0086] In some embodiments, see Fig. 9 and Fig.10 The three-temperature test sorting machine 100 further includes a baffle 120 and a sensor 130, one of which can rotate with the magnetic unit 30, and the other is installed on the support seat 90. The baffle 120 cooperates with the sensor 130 to reset the magnetic unit 30. Since the magnetic unit 30 is connected to the first driving member 71, the baffle 120 cooperates with the sensor 130 to reset the first driving member 71.

[0087] In some embodiments, the three-temperature test sorting machine 100 also includes an adjusting device, and the magnetic unit 30 is connected to the adjusting device. The adjusting device is used to adjust the distance between the magnetic unit 30 and the test plate 12 in the thickness direction of the test plate 12, thereby changing the magnetic field strength provided by the magnetic unit 30 to the test piece to meet the requirements of different test pieces for magnetic field strength.

[0088] It should be noted that the thickness direction of the panel 113 is parallel to the thickness direction of the test board 12 , and is also parallel to the connection direction of the correspondingly arranged magnetic unit 30 and the test seat 111 .

[0089] In some embodiments, see Figure 3 and Figure 4 The adjusting device includes an adjusting plate 141, and the adjusting plate 141 is connected to the support seat 90 and the panel 113 of the testing mechanism 11. The position of at least one of the magnetic unit 30 and the panel 113 and the adjusting plate 141 in the thickness direction of the testing plate 12 is adjustable to adjust the distance between the magnetic unit 30 and the testing plate 12. Optionally, the adjusting device further includes an adapter plate 142, and the adjusting plate 141 is connected to the panel 113 through the adapter plate 142.

[0090] In some specific embodiments, a first waist-shaped hole 1411 extending along the thickness direction of the test plate 12 is provided at one end of the adjustment plate 141 close to the support seat 90, and the support seat 90 is provided with a first fixing hole. The position of the adjustment plate 141 relative to the support seat 90 can be adjusted by changing the positions of the first fixing hole and the first waist-shaped hole 1411, thereby adjusting the position of the magnetic unit 30 relative to the test plate 12, thereby changing the magnetic field strength of the magnetic field provided by the magnetic unit 30 to the test piece.

[0091] In some other specific embodiments, a second waist-shaped hole extending along the thickness direction of the test plate 12 is provided at one end of the adjustment plate 141 close to the adapter plate 142, and a second fixing hole is provided on the adapter plate 142. The position of the adjustment plate 141 relative to the adapter plate 142 can be adjusted by changing the positions of the second fixing hole and the second waist-shaped hole, thereby adjusting the position of the magnetic unit 30 relative to the test plate 12, and further changing the magnetic field strength of the magnetic field provided by the magnetic unit 30 to the test piece.

[0092] In some further embodiments, the first waist-shaped hole 1411 may be provided on the support seat 90 , and the first fixing hole is provided on the adjustment plate 141 . Alternatively, the second waist-shaped hole is provided on the adapter plate 142 , and the second fixing hole is provided on the adjustment plate 141 .

[0093] The three-temperature test sorting machine 100 also includes a guide mechanism 150. When the adjustment plate 141 adjusts the spacing between the magnetic unit 30 and the test plate 12, the guide mechanism 150 is used to guide the magnetic unit 30. Optionally, the guide mechanism 150 includes a linear bearing 151. When the position of the support seat 90 relative to the adapter plate 142 along the thickness direction of the test plate 12 is adjusted, the linear bearing 151 can guide the magnetic unit 30 by guiding the support seat 90 to avoid the support seat 90 from running off, thereby avoiding the magnetic unit 30 from running off. Specifically, the guide mechanism 150 includes four linear bearings 151, and the four linear bearings 151 are respectively arranged at the four corners of the support seat 90 to ensure that the various parts of the support seat 90 move synchronously, thereby ensuring the consistency of the spacing between each magnetic unit 30 and the test seat 111 relative to it.

[0094] In some embodiments, see Fig.11 The adjusting device includes a driving mechanism 143, which is used to drive the magnetic unit 30 to move along the thickness direction of the test plate 12 to adjust the distance between the magnetic unit 30 and the test plate 12, thereby changing the magnetic field strength of the magnetic field provided by the magnetic unit 30 to the test piece. In this way, when it is necessary to adjust the distance between the magnetic unit 30 and the test plate 12, the driving mechanism 143 can automatically drive the magnetic unit 30 to move to adjust the distance, and the degree of automation is high.

[0095] Further, the test mechanism 11 includes a body and a support plate 1151. The body includes the above-mentioned panel 113, the test seat 111, the mounting seat 114 and the first part of the anti-frost cover 115, and the support plate 1151 includes the second part of the anti-frost cover 115. Among them, the test board 12 is installed on the body, the support plate 1151 is connected to the driving mechanism 143, and the magnetic unit 30 is arranged on the support plate 1151. The test mechanism 11 also includes a seal 116, and the seal 116 is arranged on at least one of the body and the support plate 1151. For example, in some embodiments, the seal 116 is arranged on the support plate 1151, in other embodiments, the seal 116 is arranged on the body, and in still other embodiments, the seal 116 is arranged on both the support plate 1151 and the body.

[0096] The driving mechanism 143 can drive the support plate 1151 to move in the thickness direction so as to switch between the first state and the second state. In some embodiments, the thickness direction is the height direction of the three-temperature test sorting machine 100. At this time, the driving mechanism 143 can drive the support plate 1151 to move up and down to change the position of the support plate 1151 and the main body in the height direction. That is, when the support plate 1151 is in the first state and the second state, its position in the height direction is different from the main body. Figure 1 As shown, the thickness direction is Figure 1 Middle Z direction.

[0097] Continue reading Fig.12 , the body has an opening 117. When the support plate 1151 is in the first state, the magnetic unit 30 can extend into the body through the opening 117, and the seal 116 is sealed and compressed between the support plate 1151 and the body to seal the opening 117. The body, the seal 116 and the support plate 1151 define a sealed cavity 112. That is, when the support plate 1151 is in the first state, the magnetic unit 30 can extend into the body through the opening 117. At this time, the distance between the magnetic unit 30 and the tested object is relatively close, and the magnetic field environment required for the tested object can be provided. At the same time, when the magnetic unit 30 enters the body, the seal 116 is compressed under the squeezing action of the support plate 1151 and the body. The compressed seal 116 can seal the opening 117 of the body, and the sealed cavity 112 is no longer connected to the outside world. In this way, when the tested object is tested at a low temperature, the test plate 12 is in a completely closed environment, and the outside air will not contact the test plate 12 and frost on its surface.

[0098] When the support plate 1151 is in the second state, the magnetic unit 30 can extend the opening 117 out of the main body. That is, after the test piece is tested, the driving mechanism 143 can drive the support plate 1151 to move along the thickness direction, so that the support plate 1151 switches from the first state to the second state. At this time, the magnetic unit 30 extends out of the main body through the opening 117, and the magnetic unit 30 will not interfere with the disassembly and assembly of other structures of the test mechanism 11.

[0099] It should be noted here that when the driving mechanism 143 drives the support plate 1151 to move in the thickness direction, the seal 116 can be compressed under the joint action of the support plate 1151 and the main body. The degree of compression of the seal 116 is different, and the distance between the magnetic unit 30 and the test plate 12 is different. By changing the degree of compression of the seal 116, the purpose of adjusting the distance between the magnetic unit 30 and the test plate 12 can be achieved, thereby changing the magnetic field strength of the magnetic field provided by the magnetic unit 30 to the test piece.

[0100] In the above arrangement, the driving mechanism 143 can drive the support plate 1151 to move in the thickness direction, so that the support plate 1151 switches between the first state and the second state. When the support plate 1151 is in the first state, the sealing member 116 can seal the opening 117, so that the test plate 12 is in a completely sealed environment, and frost is prevented from forming on the surface of the test plate 12 when the test piece is tested at a low temperature. At the same time, when the support plate 1151 is in the second state, the magnetic unit 30 can extend out of the body through the opening 117. At this time, the magnetic unit 30 and the support plate 1151 are both away from the test plate 12. When the test piece is changed, the support plate 1151 and the magnetic unit 30 will not interfere with the test plate 12, which facilitates the disassembly and assembly of the test plate 12 and improves the test efficiency.

[0101] It should be noted here that, generally, when changing the test piece, before removing the previous test board 12, it is necessary to remove part of the structure of the test mechanism 11 (such as the first part of the frost cover 115), and the support plate 1151 and the magnetic unit 30 will not interfere with the disassembly of the test mechanism 11; at the same time, after installing the test board 12, it is necessary to install the disassembled part of the test mechanism 11, and the support plate 1151 and the magnetic unit 30 will not interfere with the installation of the test mechanism 11.

[0102] In some embodiments, the sealing member 116 is annular. When the support plate 1151 is in the first state, the sealing member 116 is disposed around the periphery of the opening 117. In this way, the sealing effect of the sealing member 116 in sealing the opening 117 is ensured.

[0103] Optionally, see Fig.13 The seal 116 includes multiple sealing strips 1161, which are arranged in a ring shape, so as to facilitate the installation of the seal 116. In other embodiments, the seal 116 is an integral sealing ring structure, so as to facilitate the manufacture of the seal 116.

[0104] It should be noted that when the support plate 1151 and the body are both provided with a seal 116, when the seal 116 seals the opening 117, the support plate 1151 and the seal 116 on the body are nested. For example, in one specific embodiment, when the seal 116 seals the opening 117, the seal 116 on the support plate 1151 is nested in the seal 116 of the body. In another specific embodiment, when the seal 116 seals the opening 117, the seal 116 on the body is nested in the seal 116 on the support plate 1151.

[0105] In order to facilitate the fixation of the sealing member 116 , a mounting block 118 is provided on the support plate 1151 . The mounting block 118 is installed in a groove on the support plate 1151 , and the sealing member 116 is clamped on the mounting block 118 .

[0106] Continue reading Fig.12 The adjusting device further includes a frame 144, and the driving mechanism 143 is mounted on the frame 144. When the driving mechanism 143 drives the support plate 1151 to move relative to the frame 144 along the thickness direction, the test plate 12 and the frame 144 remain relatively fixed.

[0107] In some embodiments, see Fig.14 and Fig.15The driving mechanism 143 includes a second driving member 1431, a screw rod 1432 and a nut 1433. The screw rod 1432 and the second driving member 1431 are both connected to the frame 144, the nut 1433 is screwed to the screw rod 1432, and the support plate 1151 is connected to the nut 1433. The second driving member 1431 can drive the screw rod 1432 to rotate relative to the frame 144, so as to drive the nut 1433 to move along the thickness direction, thereby causing the support plate 1151 to move along the thickness direction. The second driving member 1431 can be a motor, or other power member that can drive the screw rod 1432 to rotate. The driving mechanism 143 ensures the stability and position accuracy of the support plate 1151 by transmitting the screw rod 1432 and the nut 1433.

[0108] Optionally, the adjusting device further comprises a mounting plate, the mounting plate is connected to the frame 144, and the second driving member 1431 is mounted on the mounting plate. That is, the second driving member 1431 is indirectly mounted on the frame 144 through the mounting plate.

[0109] The adjusting device further includes a second transmission assembly 145, through which the second driving member 1431 is connected to the screw rod 1432. The second transmission assembly 145 includes two pulleys 1451 and a second synchronous belt 1452, the two pulleys 1451 are respectively connected to the second driving member 1431 and the screw rod 1432, and the second synchronous belt 1452 is sleeved outside the two pulleys 1451. The second driving member 1431 drives the pulley 1451 connected thereto to rotate, and the second synchronous belt 1452 drives the pulley 1451 connected to the screw rod 1432 to rotate, so that the screw rod 1432 rotates relative to the frame 144, and the nut 1433 and the support plate 1151 move relative to the frame 144 in the thickness direction, so as to realize the lifting and lowering of the magnetic unit 30.

[0110] See also Fig.16 The mounting plate includes a first mounting plate 1461 and a second mounting plate 1462. The first mounting plate 1461 is connected to the frame 144, the second mounting plate 1462 is connected to the first mounting plate 1461, and the second driving member 1431 is mounted on the second mounting plate 1462. The position between the second mounting plate 1462 and the first mounting plate 1461 is adjustable to adjust the tension of the second synchronous belt 1452, so that the second driving member 1431 transmits the force to the screw rod 1432 and drives the screw rod 1432 to rotate.

[0111] In other embodiments, the driving mechanism 143 may be provided in other ways, such as providing the driving mechanism 143 to include only the second driving member 1431, omitting the screw rod 1432 and the nut 1433, and the support plate 1151 is directly connected to the second driving member 1431. The second driving member 1431 is a cylinder.

[0112] Continue reading Fig.12The adjusting device further includes a slider 147 and a guide rail 148 extending in the thickness direction, one of the guide rail 148 and the slider 147 is connected to the frame 144, and the other of the guide rail 148 and the slider 147 is connected to the support plate 1151. The slider 147 cooperates with the guide rail 148 to guide the support plate 1151 in the thickness direction. In this way, when the support plate 1151 moves relative to the frame 144 in the thickness direction, the slider 147 cooperates with the guide rail 148 to prevent the support plate 1151 from running off.

[0113] In some embodiments, see Fig.17 The adjusting device further includes a first sensing member 149 and a first matching member 1410, one of which is disposed on the frame 144 and the other is disposed on the support plate 1151. When the support plate 1151 is in the first state and the distance between the support plate 1151 and the test plate 12 in the thickness direction reaches a first preset threshold, the first sensing member 149 can sense the first matching member 1410, and the driving mechanism 143 stops driving the support plate 1151 to move in the positive direction in the thickness direction. When the thickness direction is the height direction, the test plate 12 is located above the driving mechanism 143, and the positive direction in the thickness direction is the upward direction in the height direction.

[0114] When the support plate 1151 is in the first state, the seal 116 is compressed and sealed between the support plate 1151 and the body. At this time, the distance between the support plate 1151 and the body in the thickness direction is small. Depending on the degree of compression of the seal 116, the distance between the support plate 1151 and the body in the thickness direction is different. The driving mechanism 143 can change the degree of compression of the seal 116 by driving the support plate 1151 to move, thereby changing the distance between the magnetic unit 30 and the test plate 12, and then changing the magnetic field strength provided by the magnetic unit 30 to the test piece. The setting of the first preset threshold is determined according to the magnetic field strength required by the test piece, that is, according to the distance between the magnetic unit 30 and the test piece. Specifically, the position of the first sensing member 149 and / or the first matching member 1410 is adjustable to change the size of the first preset threshold.

[0115] With the above arrangement, when the distance between the support plate 1151 and the test plate 12 in the thickness direction reaches a first preset threshold, the first sensing member 149 can sense the first matching member 1410, and the driving mechanism 143 stops driving the support plate 1151 to move in the positive direction along the thickness direction, thereby ensuring that the magnetic unit 30 provides a suitable magnetic field strength to the test piece.

[0116] In some embodiments, the first sensing element 149 is a photoelectric sensor 130 , and the first matching element 1410 is a blocking piece 120 .

[0117] See also Fig.17, the adjustment device also includes a first limit portion 1420 and a first matching portion 1430, one of the first limit portion 1420 and the first matching portion 1430 is arranged on the frame 144, and the other is arranged on the support plate 1151. When the support plate 1151 is in the first state and the spacing between the support plate 1151 and the test plate 12 in the thickness direction reaches the minimum limit value, the first limit portion 1420 abuts against the first matching portion 1430, and the driving mechanism 143 stops driving the support plate 1151 to move forward in the thickness direction. Among them, the minimum limit value is less than the first preset threshold value. In some embodiments, the minimum limit value is 0, the seal 116 is compressed to the limit value, and the support plate 1151 abuts against the test plate 12 in the thickness direction. Of course, in some other embodiments, the minimum limit value is not limited.

[0118] If the first sensing member 149 is damaged, the driving mechanism 143 will continue to drive the support plate 1151 to move forward in the thickness direction. According to the above arrangement, when the distance between the support plate 1151 and the test plate 12 in the thickness direction reaches the minimum limit value, the first limit portion 1420 abuts against the first matching portion 1430, and the driving mechanism 143 stops driving the support plate 1151 to move forward in the thickness direction, thereby preventing some structures from being squeezed and damaged, such as preventing the magnetic unit 30 and the test plate 12 from being damaged by overpressure, and playing a certain protective role.

[0119] Continue reading Fig.17 The adjusting device further includes a second sensing member 1440 and a second matching member 1450, one of which is disposed on the frame 144 and the other is disposed on the support plate 1151. When the support plate 1151 is in the second state and the distance between the support plate 1151 and the test plate 12 in the thickness direction reaches a second preset threshold, the second sensing member 1440 can sense the second matching member 1450, and the driving mechanism 143 stops driving the support plate 1151 to move in the reverse direction in the thickness direction. This arrangement can prevent the distance between the support plate 1151 and the test plate 12 from being too large.

[0120] In some specific embodiments, the first sensing member 149 and the second sensing member 1440 are integrated into one body, and the first matching member 1410 and the second matching member 1450 are spaced apart in the thickness direction. In other specific embodiments, the first sensing member 149 and the second sensing member 1440 are spaced apart in the thickness direction, and the first matching member 1410 and the second matching member 1450 are integrated into one body.

[0121] In some embodiments, see Fig.18The adjusting device further includes a second position-limiting portion 1460 and a second matching portion 1470, one of which is disposed on the frame 144 and the other is disposed on the support plate 1151. When the support plate 1151 is in the second state and the distance between the support plate 1151 and the test plate 12 in the thickness direction reaches the maximum limit value, the second position-limiting portion 1460 abuts against the second matching portion 1470, and the driving mechanism 143 stops driving the support plate 1151 to move in the reverse direction in the thickness direction. The maximum limit value is greater than the second preset threshold value.

[0122] If the second sensing member 1440 is damaged, the driving mechanism 143 will continue to drive the support plate 1151 to move in the reverse direction along the thickness direction. According to the above configuration, when the distance between the support plate 1151 and the test plate 12 in the thickness direction reaches the maximum limit value, the second limit portion 1460 abuts against the second matching portion 1470, and the driving mechanism 143 stops driving the support plate 1151 to move in the reverse direction along the thickness direction, thereby preventing some structures from being squeezed and damaged, such as preventing the support plate 1151 from contacting the second driving member 1431 and causing damage to the second driving member 1431, thus playing a certain protective role.

[0123] In some embodiments, a part of the support plate 1151 can be used as the above-mentioned matching part or limiting part. For example, the support plate 1151 includes a connecting plate 1152 and a supporting plate 1153 connected to each other, the connecting plate 1152 is connected to the guide rail 148 through a slider 147, and the magnetic unit 30 and the sealing member 116 are arranged on the supporting plate 1153. The above-mentioned matching part or limiting part is directly formed on the connecting plate 1152. The support plate 1151 also includes a supporting rib 1154, which is obliquely supported between the connecting plate 1152 and the supporting plate 1153 to play a reinforcing role.

[0124] Further, the frame 144 is provided with casters 1480, and the driving mechanism 143 moves relative to the working surface via the casters 1480. Thus, when the driving mechanism 143 is not needed, the driving mechanism 143 can drive the magnetic unit 30 to move to a suitable position via the casters 1480.

[0125] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A three-temperature test sorting machine, comprising a test area (A) and a discharge area (B), characterized in that: include: A testing device (10) comprises a testing mechanism (11) and a testing board (12), wherein the testing mechanism (11) has a sealed cavity (112), the testing board (12) is arranged in the sealed cavity (112), the testing mechanism (11) comprises a testing seat (111), and the testing seat (111) is electrically connected to the testing board (12) via a probe; A pressing head device (20), arranged in the test area (A), used for pressing the tested object into the test seat (111) to electrically connect it to the test board (12); A magnetic unit (30), disposed in the sealed cavity (112), and used to provide a magnetic field environment for the object under test; A transport device (40), the transport device (40) being used to transport the tested piece from the testing area (A) to the discharging area (B); A barrier (50) is provided between the test area (A) and the discharge area (B), the barrier (50) is connected to the test mechanism (11) and is provided with an avoidance groove (51) for avoiding the carrier (40), and the barrier (50) is used to block the airflow of the discharge area (B) from flowing toward the test area (A).

2. The three-temperature test sorting machine according to claim 1, characterized in that: The three-temperature testing and sorting machine further comprises an opening and closing door (60), wherein the opening and closing door (60) is installed on the blocking member (50) and is used for opening or closing the avoidance groove (51).

3. The three-temperature test sorting machine according to claim 1, characterized in that: The test mechanism (11) further comprises a panel (113), a mounting seat (114) and an anti-frost cover (115); the panel (113) is provided with an installation groove (1131) extending through the panel (113) in the thickness direction; the mounting seat (114) is installed in the installation groove (1131); the test seat (111) is installed on the mounting seat (114); and the anti-frost cover (115) is installed on one side of the panel (113) in the thickness direction; the panel (113), the mounting seat (114), the test seat (111) and the anti-frost cover (115) define and form the sealed cavity (112); The panel (113) forms the test area (A) and the discharge area (B) on the other side of the panel (113) facing away from the anti-frost cover (115) in the thickness direction, and the barrier (50) is protruding from the side of the panel (113) facing away from the anti-frost cover (115).

4. The three-temperature test sorting machine according to claim 1, characterized in that: The three-temperature test sorting machine further comprises a driving device (70) disposed in the sealed cavity (112), the magnetic unit (30) being connected to the driving device (70), and the driving device (70) being used to drive the magnetic unit (30) to rotate so that the magnetic unit (30) provides a changing magnetic field environment to the test piece.

5. The three-temperature test sorting machine according to claim 1, characterized in that: The number of the magnetic units (30) is equal to the number of the test seats (111) and they are arranged in one-to-one correspondence, the correspondingly arranged test seats (111) and the magnetic units (30) are respectively located on two opposite sides of the test board (12), and each magnetic unit (30) is used to provide a magnetic field environment to the test piece of the test seat (111) corresponding thereto; or The number of the magnetic units (30) is not equal to the number of the test seats (111).

6. The three-temperature test sorting machine according to claim 1, characterized in that: The three-temperature test sorting machine comprises at least two magnetic units (30); The three-temperature test sorting machine further comprises a magnetic isolation component (80), wherein the magnetic isolation component (80) is used to isolate magnetic transmission between the magnetic units (30).

7. The three-temperature test sorting machine according to any one of claims 1 to 6, characterized in that: The three-temperature test sorting machine further comprises an adjusting device, the magnetic unit (30) being connected to the adjusting device, the adjusting device being used to adjust the distance between the magnetic unit (30) and the test plate (12) in the thickness direction of the test plate (12), thereby changing the magnetic field strength provided by the magnetic unit (30) to the test piece.

8. The three-temperature test sorting machine according to claim 7, characterized in that: The adjustment device is arranged in the sealed cavity (112) and comprises an adjustment plate (141), wherein the adjustment plate (141) is connected to the test mechanism (11); the position of at least one of the magnetic unit (30) and the test mechanism (11) and the adjustment plate (141) in the thickness direction is adjustable so as to adjust the distance between the magnetic unit (30) and the test plate (12).

9. The three-temperature test sorting machine according to claim 7, characterized in that: The adjustment device comprises a driving mechanism (143), and the driving mechanism (143) is used to drive the magnetic unit (30) to move along the thickness direction of the test plate (12) to adjust the distance between the magnetic unit (30) and the test plate (12).

10. The three-temperature test sorting machine according to claim 9, characterized in that: The testing mechanism (11) comprises a body and a support plate (1151), the body comprises the testing seat (111), the testing plate (12) is mounted on the body, the support plate (1151) is connected to the driving mechanism (143), and the magnetic unit (30) is arranged on the support plate (1151); The testing mechanism (11) further comprises a sealing member (116), the body having an opening (117), and the sealing member (116) is arranged on at least one of the body and the support plate (1151); The driving mechanism (143) is capable of driving the support plate (1151) to move along the thickness direction so as to switch between a first state and a second state; when the support plate (1151) is in the first state, the magnetic unit (30) is capable of extending into the body through the opening (117), and the sealing member (116) is compressed between the support plate (1151) and the body to seal the opening (117); the body, the sealing member (116) and the support plate (1151) define and form the sealed cavity (112); when the support plate (1151) is in the second state, the magnetic unit (30) is capable of extending out of the body through the opening (117).

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