Bearing jig and testing device

Abstract

The utility model provides a bearing jig and a testing device, and relates to the technical field of component sorting, the bearing jig provided by the utility model comprises a jig body, a limiting piece and a heat insulation layer, the limiting piece is convexly arranged on the surface of the jig body, and the heat insulation layer is arranged on the limiting piece. The surface, away from the jig body, of the limiting piece is a supporting limiting face used for supporting and limiting the position of the pressure measuring arm, and the heat insulation layer is arranged on the surface, provided with the limiting piece in a protruding mode, of the jig body and located on the side of the limiting piece. The bearing jig provided by the utility model can effectively reduce the heat transfer of the pressure measuring arm to the bearing jig during low-temperature testing, avoids the great change of the temperature of the bearing jig, and is favorable for avoiding the frosting and dewing phenomena of the bearing jig.

Description

Technical Field

[0001] The utility model relates to the technical field of component sorting, in particular to a bearing fixture and a testing device. Background Art

[0002] In the existing chip sorting machine, the test board and the fixture are installed on the support plate, and the bearing fixture is installed on the fixture and fixed by means of threads or the like. When the transport device of the sorting machine moves the chip to the fixture, the pressure measuring arm presses down to contact the chip and applies a given pressure value to make the chip stably contact with the test part. After the pressure measuring arm completes the test on the chip, it is lifted up, and the transport device takes away the tested chip and puts it in the receiving bin to complete the test.

[0003] However, the existing sorting machines have the following shortcomings:

[0004] 1. After the pressure measuring arm is pressed onto the load-bearing fixture, the bottom surface of the pressure measuring arm is in full contact with the top surface of the load-bearing fixture, resulting in a large contact area between the two. The heat on the pressure measuring arm will be transferred to the load-bearing fixture, which is not conducive to preventing frost and condensation on the load-bearing fixture;

[0005] 2. In low-temperature testing environments, the existing technology mainly adopts the method of continuously filling the internal space of the support plate with dry gas (dew point of dry gas is -70°C, temperature is about 20°C) to ensure that the lower surface of the test plate is in a dry environment. At the same time, dry gas is passed through the upper side of the inside of the carrier fixture to ensure that the inside is in a dry environment. However, since the dry gas outlet inside the carrier fixture is located on the upper side of the carrier fixture, the dry gas outlet is far away from the fixture, which is not conducive to preventing frost and condensation of the fixture. In addition, since the outer side of the fixture is directly in contact with the outside air, frost and condensation may easily occur on the outer side of the fixture.

[0006] Therefore, there is an urgent need to provide a load-bearing fixture and a testing device that can effectively solve at least one of the above technical problems. Utility Model Content

[0007] The utility model aims to provide a load-bearing fixture and a testing device, which can effectively reduce the heat transfer from the pressure measuring arm to the load-bearing fixture during low-temperature testing, thereby helping to avoid frost and condensation on the load-bearing fixture.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] In the first aspect, the utility model provides a load-bearing jig, comprising a jig body, a limit piece and a thermal insulation layer, wherein the limit piece is protruding from the surface of the jig body, and the surface of the limit piece facing away from the jig body is a supporting limit surface for supporting and limiting the position of a pressure measuring arm, and the thermal insulation layer is arranged on the surface of the jig body on which the limit piece is protruding, and the thermal insulation layer and the limit piece are arranged to avoid each other.

[0010] Furthermore, the supporting fixture further comprises an external airway plate group, which is arranged on a side of the fixture body away from the limiting member, and has a first air outlet for blowing dry air toward the outer side of the fixture.

[0011] Furthermore, the outer airway plate group includes an inner plate and an outer plate both connected to the fixture body, the outer plate has an air inlet channel, the outer plate is arranged on the outer side of the inner plate and forms an air outlet channel connected to the air inlet channel between the outer plate and the inner plate, and the air outlet channel has the first air outlet.

[0012] Furthermore, the outer panel includes an outer panel body and a first extension end extending from the outer panel body to the bottom of the inner panel, the outer panel body has the air inlet passage, and the air outlet passage is formed between the outer panel body, the first extension end and the inner panel.

[0013] Furthermore, the outer plate further includes a second extending end extending from the first extending end in a direction away from the inner plate, and the second extending end is used to form an air guiding channel with the outer side surface of the clamp.

[0014] Further, the air outlet channel is arranged in a ring shape around the outer surface of the inner plate;

[0015] The air inlet passage is configured in plurality, and each of the air inlet passages is communicated with the air outlet passage.

[0016] Furthermore, the fixture body has a second air outlet, the second air outlet is located between the fixture body and the outer airway plate group, and the second air outlet is used to blow dry air from above the fixture.

[0017] Furthermore, a groove is formed on a surface of the jig body facing the outer airway plate assembly, an internal airway is formed between the groove and the outer airway plate assembly, and the internal airway has the second air outlet.

[0018] In the second aspect, the utility model also provides a testing device, comprising a pressure measuring arm and the bearing fixture described in the above scheme, wherein the surface of the pressure measuring arm facing the supporting limit surface is a plane, and a clearance gap is formed between the plane and the surface of the fixture body on which the limit member is protruding, and the thermal insulation layer is located in the clearance gap.

[0019] Furthermore, the testing device comprises a fixture and a testing board, wherein the fixture is connected to a side of the testing board facing the supporting fixture and can extend into the supporting fixture.

[0020] Furthermore, the testing device further comprises a supporting plate connected to a side of the testing board facing away from the fixture, and the supporting plate has a third air outlet for blowing dry air toward the side of the testing board facing away from the fixture.

[0021] The load-bearing fixture and testing device provided by the utility model can produce the following beneficial effects:

[0022] When the pressure measuring arm is pressed onto the carrying fixture provided by the first aspect of the utility model, the support limit surface supports and limits the pressure measuring arm. Since a heat insulation layer is provided on the side of the limit member (i.e., an avoidance arrangement is provided between the heat insulation layer and the limit member), the heat insulation layer can separate the pressure measuring arm and the carrying fixture, so that the pressure measuring arm and the carrying fixture are in contact only through the limit surface, which effectively reduces the heat transfer from the pressure measuring arm to the carrying fixture during low-temperature testing, avoids large changes in the temperature of the carrying fixture, and is beneficial to avoid frost and condensation on the carrying fixture.

[0023] In the test device provided by the second aspect of the utility model, the surface of the pressure measuring arm facing the support limit surface is a plane, a clearance gap is formed between the plane and the surface of the fixture body on which the limiter is convexly provided, and the heat insulation layer is located in the clearance gap. Compared with the prior art, the test device provided by the second aspect of the utility model can effectively reduce the heat transfer from the pressure measuring arm to the supporting fixture, which is conducive to reducing the frost and condensation phenomenon of the supporting fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A front view of a testing device provided by an embodiment of the utility model;

[0026] Figure 2 for Figure 1 A-A cross-sectional view;

[0027] Figure 3 A schematic diagram of a partial structure of a load-bearing fixture provided in an embodiment of the utility model;

[0028] Figure 4 A top view of a load-bearing fixture provided in an embodiment of the utility model;

[0029] Figure 5 for Figure 4 C-C cross-section diagram;

[0030] Figure 6 for Figure 1 B-B cross-sectional view;

[0031] Figure 7 for Figure 6 A local enlarged schematic diagram of point D;

[0032] Figure 8 A schematic diagram of the three-dimensional structure of an external airway plate assembly provided in an embodiment of the utility model;

[0033] Fig. 9 A schematic diagram of a three-dimensional structure of an outer panel provided in an embodiment of the utility model;

[0034] Fig.10 A schematic diagram of a three-dimensional structure of a load-bearing fixture provided in an embodiment of the utility model;

[0035] Fig.11 A schematic diagram of a three-dimensional structure of a fixture body provided in an embodiment of the utility model;

[0036] Fig.12 A three-dimensional structural schematic diagram of a testing device provided in an embodiment of the utility model;

[0037] Fig.13 A schematic diagram of the partial structure of a testing device provided in an embodiment of the utility model.

[0038] Icons: 1- fixture body; 11- groove; 111- main groove body; 112- branch groove body; 12- second joint; 2- limiter; 21- support limiter surface; 22- positioning hole; 3- insulation layer; 4- outer airway plate group; 41- inner plate; 42- outer plate; 421- outer plate body; 4211- air inlet channel; 422- first extension end; 423- second extension end; 43- air outlet channel; 431- first air outlet; 44- first joint; 5- fixture; 6- air guide channel; 7- second air outlet; 8- pressure measuring arm; 9- clearance; 10- test plate; 011- support plate; 0111- third air outlet; 0112- third air inlet; 012- test seat. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0043] The first aspect of the present invention provides a load-bearing fixture. Figures 1 to 3 As shown, it includes a fixture body 1, a limit member 2 and a thermal insulation layer 3. The limit member 2 is protruding from the surface of the fixture body 1, and the surface of the limit member 2 away from the fixture body 1 is a supporting limit surface 21 for supporting and limiting the position of the pressure measuring arm 8. The thermal insulation layer 3 is arranged on the surface of the fixture body 1 on which the limit member 2 is protruding, and the thermal insulation layer 3 is located on the side of the limit member 2, that is, the thermal insulation layer 3 and the limit member 2 are avoided.

[0044] refer to Figure 2 The bearing fixture provided in the above embodiment is specifically described. Since the limiter 2 is convexly arranged on the surface of the fixture body 1, the pressure measuring arm 8 can preferentially contact the supporting limiter surface 21 of the limiter 2 when pressing down. Since the heat insulation layer 3 is arranged on the side of the limiter 2, the heat insulation layer 3 can separate the fixture body 1 from the surface where the limiter 2 is arranged and the pressure measuring arm 8. The above embodiment not only reduces the contact area between the pressure measuring arm 8 and the fixture body 1, but also reduces the heat transfer between the two by arranging the heat insulation layer 3 between the two, thereby avoiding a large change in the temperature of the bearing fixture, which is conducive to preventing the bearing fixture from frosting and condensation.

[0045] Specifically, the limiting member 2 can be configured with two, three, four or more to stably support the pressure measuring arm 8, such as Figure 3 As shown, there are four limit members 2 , which are arranged opposite to each other in pairs and are arranged around a through hole in the middle of the fixture body 1 , and the through hole is used for the pressure measuring arm 8 to pass through.

[0046] The limiting member 2 can be connected to the fixture body 1 by means of connecting members such as screws. Figure 3 As described above, a positioning hole 22 is provided in the middle of the limiting member 2 , and when the pressure measuring arm 8 descends, the positioning pin on the pressure measuring arm 8 can extend into the positioning hole 22 to realize the positioning of the pressure measuring arm 8 .

[0047] In a low-temperature test environment, in the prior art, since the outer side of the fixture is directly in contact with the outside air, frost and condensation may easily occur on the outer side of the fixture. Figure 4 and Figure 5 As shown, the bearing fixture further includes an outer airway plate group 4 , which is arranged on the side of the fixture body 1 away from the limiter 2 , and has a first air outlet 431 for blowing dry air to the outer side of the fixture 5 .

[0048] Specifically, Figure 6 and Figure 7 As shown, in a low-temperature test environment, the first air outlet 431 on the outer airway plate group 4 blows dry air to the outer side of the fixture 5, so that the outer side of the fixture 5 is also in a dry environment, effectively avoiding frost and condensation on the outer side of the fixture 5.

[0049] In some embodiments, in order to facilitate the dry gas of the gas source to be directed to the outer airway plate assembly and blown out from the first air outlet 431, as shown in FIG. Figure 6 and Figure 7 As shown, the outer airway plate group 4 includes an inner plate 41 and an outer plate 42 both connected to the fixture body 1, the outer plate 42 has an air inlet channel 4211, the outer plate 42 is arranged on the outer side of the inner plate 41 and forms an air outlet channel 43 connected to the air inlet channel 4211 between the outer plate 42 and the inner plate 41, and the air outlet channel 43 has a first air outlet 431.

[0050] When in use, dry air enters the outlet channel 43 from the air inlet channel 4211 and blows toward the outer side of the fixture 5 from the first outlet port 431 of the outlet channel 43. The outer air channel plate assembly 4 adopts a split structure, which is simple in structure and facilitates the formation of the outlet channel 43.

[0051] Specifically, a first connector 44 may be provided at the air inlet of the air inlet channel 4211 , and a pipeline extending from the air source may be directly connected to the first connector 44 , so as to facilitate the communication between the air source and the air inlet channel 4211 .

[0052] Among them, Figure 7As shown, the outer plate 42 includes an outer plate body 421 and a first extension end 422 extending from the outer plate body 421 to the bottom of the inner plate 41. The outer plate body 421 is arranged on the outside of the inner plate 41, and the outer plate body 421 has an air inlet channel 4211. An air outlet channel 43 is formed between the outer plate body 421, the first extension end 422 and the inner plate 41.

[0053] The above-mentioned arrangement makes it easy to blow the dry air blown out of the air inlet channel 4211 from the bottom of the inner plate 41, and the blowing direction is parallel to the bottom surface of the inner plate 41. Since the inner plate 41 is pressed above the clamp 5 during the detection process, the dry air below the inner plate 41 can be directly blown toward the outer side of the clamp 5.

[0054] Among them, the extension direction of the air inlet channel 4211 can be parallel to the bottom surface of the inner plate 41, the channel between the outer plate body 421 and the side of the inner plate 41 is perpendicular to the air inlet channel 4211, and the channel between the first extension end 422 and the bottom surface of the inner plate 41 is parallel to the air inlet channel 4211, thus forming an "L"-shaped air outlet channel 43.

[0055] In some embodiments, Figure 7 As shown, the outer plate 42 further includes a second extension end 423 extending from the first extension end 422 in a direction away from the inner plate 41 , and the second extension end 423 is used to form an air guide channel 6 with the outer side surface of the clamp 5 .

[0056] Under the guidance of the air guide channel 6, the dry air can move a certain distance from the top to the bottom of the inner plate side and then overflow to the outside. This ensures that sufficient dry air is gathered at the bottom of the outer side of the inner plate 41, and the anti-frost and condensation effect is better.

[0057] Specifically, the extension direction of the air guide channel 6 is perpendicular to the bottom surface of the inner plate 41 .

[0058] In some embodiments, Figure 8 As shown, the air outlet channel 43 is arranged in a ring shape around the outer side surface of the inner plate 41, and the first air outlet 431 of the air outlet channel 43 is also arranged in a ring shape.

[0059] The above arrangement allows the dry air blown out of the first air outlet 431 to surround the outer side of the clamp 5 , and the dry air fully covers the outer side of the clamp 5 , making it difficult for frost or dew to form on the outer side of the clamp 5 .

[0060] In some embodiments, to ensure that the air inlet channel 4211 can provide sufficient dry air to the air outlet channel 43 , the air inlet channel 4211 is configured as multiple, and each air inlet channel 4211 is connected to the air outlet channel 43 to fill the dry air into the air outlet channel 43 together.

[0061] Specifically, the number of the air inlet passages 4211 may be two, three, four or five.

[0062] Preferably, if Fig. 9 As shown, there are four air intake channels 4211 , which are arranged in groups of two. The two groups of air intake channels 4211 are respectively distributed on both sides of the outer plate 42 , and each air intake channel 4211 can be arranged close to a corner of the outer plate 42 .

[0063] In some embodiments, Fig.10 As shown, the fixture body 1 has a second air outlet 7, which is located between the fixture body 1 and the outer airway plate group 4. The second air outlet 7 is used to blow dry air from above the fixture 5. The dry air can cover the upper surface of the fixture 5 to prevent frost and condensation from occurring inside the self-testing device.

[0064] In the prior art, since the dry gas outlet is located on the upper side of the supporting fixture, in the height direction, the dry gas outlet is far away from the fixture 5, which is not conducive to preventing frost and condensation of the fixture 5. In the above embodiment, the second air outlet 7 is located between the fixture body 1 and the outer airway plate group 4, that is, the second air outlet 7 is located at the lower end of the fixture body 1, which can effectively shorten the distance between the second air outlet 7 and the fixture 5 in the height direction, and the dry gas discharged from the second air outlet 7 can quickly reach the upper surface of the fixture 5 pressed down by the inner plate 41.

[0065] The second air outlet 7 can be formed on the surface of the jig body 1 facing the outer airway plate group 4, or on the surface of the outer airway plate group 4 facing the jig body 1, or on both surfaces at the same time.

[0066] Preferably, if Fig.11 As shown, a groove 11 is formed on the surface of the fixture body 1 facing the outer airway plate assembly 4 , and an internal airway is formed between the groove 11 and the outer airway plate assembly 4 , and the internal airway has a second air outlet 7 .

[0067] When in use, the groove 11 can receive dry air from an external air source and blow the dry air out from the second air outlet 7 .

[0068] The groove 11 may include a main groove body 111 and a plurality of branch groove bodies 112 connected to the main groove body 111 . The main groove body 111 is arranged in a ring shape. One end of each branch groove body 112 is connected to the main groove body 111 , and the other end is the second air outlet 7 .

[0069] Preferably, the support grooves 112 are arranged around the through hole in the middle of the fixture body 1, so that dry air can be blown out from multiple locations above the clamp 5, thereby ensuring the anti-frost and condensation effect of the clamp.

[0070] Specifically, the fixture body 1 may be provided with a transfer channel, one end of which is connected to the second joint 12 , and the other end of which is communicated with the groove 11 , so as to guide the external dry air to the groove 11 .

[0071] The number of transfer channels can be two, three, four or five.

[0072] Preferably, there are four transfer channels, correspondingly provided with four second joints 12. The four second joints 12 are arranged in groups of two, and the two groups of second joints 12 are respectively distributed on both sides of the bottom end of the fixture body 1, and each second joint 12 can be arranged near a corner of the main tank body 111.

[0073] The second aspect of the present invention provides a testing device. Figure 2 , Figure 3 and Fig.12 As shown, the testing device provided by the embodiment of the second aspect of the utility model includes a pressure measuring arm 8 and the above-mentioned bearing fixture, the surface of the pressure measuring arm 8 facing the supporting limit surface 21 is a plane, and a clearance gap 9 is formed between the plane and the surface of the fixture body 1 on which the limit member 2 is protruding, and the thermal insulation layer 3 is located in the clearance gap 9.

[0074] Specifically, the thermal insulation layer 3 can fill the clearance gap 9 or partially fill the clearance gap 9. The thickness of the thermal insulation layer 3 can be equal to the height dimension of the limiting member 2 protruding from the fixture body 1 or slightly smaller than the height dimension of the limiting member 2 protruding from the fixture body 1.

[0075] Compared with the prior art, the testing device provided in the second embodiment of the utility model can effectively reduce the heat transfer from the pressure measuring arm 8 to the carrying fixture, which is helpful to avoid frost and condensation on the carrying fixture.

[0076] In some embodiments, Fig.12 As shown, the test device also includes a fixture 5 and a test board 10. The fixture 5 is connected to the side of the test board 10 facing the fixture body 1 of the supporting fixture and can be extended into the supporting fixture, that is, the fixture 5 can be extended into the outer airway plate group 4 so that the pressure measuring arm 8 can pressure measure the chip to be tested located in the fixture 5.

[0077] During installation, the jig body 1 in the carrier jig can be limited to the jig 5 by the positioning pins thereon cooperating with the positioning holes on the fixture 5, and the jig body 1 and the fixture 5 can be fixed by connecting parts such as bolts.

[0078] In some embodiments, Fig.13As shown, the testing device also includes a supporting plate 011 connected to the side of the testing board 10 away from the clamp 5, and the supporting plate 011 has a third air outlet 0111 for blowing dry air to the side of the testing board 10 away from the clamp 5. The third air outlet 0111 can blow dry air to the testing board 10, thereby preventing the testing board 10 from frosting and condensation.

[0079] Among them, Fig.13 As shown, the third air outlet 0111 can be configured as multiple ones, so as to facilitate blowing dry air to a large area of ​​the test board 10.

[0080] Specifically, the support plate 011 may have an air guide channel, such as Fig.13 As shown, the air guide channel has a third air outlet 0111 and a third air inlet 0112 connected to the third air outlet 0111. The third air inlet 0112 is used to communicate with an external dry air source and output dry air from the third air outlet 0111 to the test board 10 through the air guide channel.

[0081] Among them, Fig.13 As shown, the third air inlet 0112 may also be configured as multiple, and dry air may be quickly supplied to multiple third air outlets 0111 to ensure sufficient dry air source.

[0082] During installation, the support plate 011 is installed on the crossbeam of the machine platform, and the support plate 011 can be connected to the test plate 10 by connecting members such as bolts.

[0083] In some embodiments, Fig.12 As shown, the test device also includes a test socket 012, and the fixture body 1 in the supporting fixture is connected to the test socket 012. The test socket 012 is equipped with a heating device, which can heat the supporting fixture to ensure that the supporting fixture will not frost or condense at low temperatures.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A load-bearing fixture, characterized in that: The jig comprises a jig body (1), a limiting member (2) and a heat insulating layer (3); the limiting member (2) is protruding from the surface of the jig body (1); the surface of the limiting member (2) facing away from the jig body (1) is a supporting limiting surface (21) for supporting and limiting the position of a pressure measuring arm (8); the heat insulating layer (3) is arranged on the surface of the jig body (1) on which the limiting member (2) is protruding, and the heat insulating layer (3) and the limiting member (2) are arranged to avoid each other.

2. The carrying fixture according to claim 1, characterized in that: The supporting fixture further comprises an external airway plate group (4), wherein the external airway plate group (4) is arranged on a side of the fixture body (1) away from the limiting member (2), and the external airway plate group (4) has a first air outlet (431) for blowing dry air toward the outer side of the fixture (5).

3. The carrying fixture according to claim 2, characterized in that: The outer airway plate group (4) comprises an inner plate (41) and an outer plate (42) both connected to the jig body (1); the outer plate (42) has an air inlet channel (4211); the outer plate (42) is arranged on the outer side of the inner plate (41) and forms an air outlet channel (43) connected to the air inlet channel (4211) between the outer plate (42) and the inner plate (41); the air outlet channel (43) has the first air outlet (431).

4. The carrying fixture according to claim 3, characterized in that: The outer plate (42) includes an outer plate body (421) and a first extension end (422) extending from the outer plate body (421) to the bottom of the inner plate (41), the outer plate body (421) has the air inlet channel (4211), and the air outlet channel (43) is formed between the outer plate body (421), the first extension end (422) and the inner plate (41).

5. The carrying fixture according to claim 4, characterized in that: The outer plate (42) further comprises a second extension end (423) extending from the first extension end (422) in a direction away from the inner plate (41), wherein the second extension end (423) is used to form an air guide channel (6) with the outer side surface of the clamp (5).

6. The carrying fixture according to claim 2, characterized in that: The fixture body (1) has a second air outlet (7), the second air outlet (7) is located between the fixture body (1) and the outer airway plate group (4), and the second air outlet (7) is used to blow dry air from above the fixture (5).

7. The carrying fixture according to claim 6, characterized in that: A groove (11) is provided on the surface of the jig body (1) facing the outer airway plate group (4), an internal airway is formed between the groove (11) and the outer airway plate group (4), and the internal airway has the second air outlet (7).

8. A testing device, characterized in that: It comprises a pressure measuring arm (8) and a bearing fixture as claimed in any one of claims 1 to 7, wherein the surface of the pressure measuring arm (8) facing the supporting limit surface (21) is a plane, and a clearance gap (9) is formed between the plane and the surface of the fixture body (1) on which the limit member (2) is protruding, and the heat insulation layer (3) is located in the clearance gap (9).

9. The testing device according to claim 8, characterized in that: The testing device comprises a fixture (5) and a testing board (10); the fixture (5) is connected to a side of the testing board (10) facing the supporting fixture and can extend into the supporting fixture.

10. The testing device according to claim 9, characterized in that: The testing device further comprises a support plate (011) connected to a side of the testing plate (10) facing away from the fixture (5), and the support plate (011) has a third air outlet for blowing dry air toward the side of the testing plate (10) facing away from the fixture (5).

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