Test tool case and test system

Abstract

The utility model relates to the field of test equipment, in particular to a test tool case and a test system. The test tool case is used for testing a to-be-tested module and comprises a circuit board and a plurality of side walls; the side wall comprises a hollow plate and a dustproof net; the hollowed-out plates of the plurality of side walls are connected to define a box body with an opening in one side, so that the module to be tested can be placed in the box body from the opening; the dustproof nets are installed on the outer sides of the corresponding hollowed-out plates. The circuit board is installed in the box body and is used for being connected with a module to be tested; the circuit board is connected with the hollowed-out plate of the back side wall, and the back side wall is a side wall away from the opening. According to the test tool case provided by the invention, the case body is composed of the lightweight aluminum alloy frame, under the condition that the stable supporting strength of 6U-LRM architecture standard equipment is guaranteed, unnecessary parts except for the function of supporting the 6U-LRM equipment are reduced, the weight and size of a machine body are greatly reduced, carrying is convenient, and the machine body structure is convenient to assemble and disassemble.

Description

Technical Field

[0001] This application relates to the field of testing equipment, and in particular to a test fixture enclosure and a test system. Background Technology

[0002] LRM connectors are designed to reduce load and stress during mating and are commonly used in high-density, high-reliability electronic systems. In the communications industry, LRM connector devices are typically available in 3U and 6U physical sizes. The 6U-LRM architecture standard bus device is widely used in communications and industrial control fields due to its excellent electrical characteristics and signal integrity.

[0003] As embedded devices, the use, testing, and maintenance of 6U-LRM architecture standard devices must rely on the host device. However, the industrial control chassis that serves as the host is not convenient to carry or move, which makes it very inconvenient for technicians to debug, inspect, and maintain 6U-LRM architecture standard devices. Utility Model Content

[0004] The purpose of this application is to provide a test fixture chassis and test system that can significantly reduce the weight and size of the chassis, making it easier to carry and move.

[0005] This application provides a test fixture chassis for testing a module under test, the test fixture chassis including a circuit board and multiple side walls;

[0006] The sidewall includes a perforated plate and a dustproof net; multiple perforated plates of the sidewall are connected to form a box with an opening on one side, so that the module to be tested can be placed in the box through the opening; the dustproof net is installed on the outside of the corresponding perforated plate;

[0007] The circuit board is installed inside the housing and is used to connect to the module under test; the circuit board is connected to the cutout plate on the back side wall, which is the side wall away from the opening.

[0008] In the above technical solution, the hollow plate of the back sidewall is provided with a plurality of support protrusions arranged at intervals, and the circuit board is connected to the plurality of support protrusions so that an accommodating gap is formed between the circuit board and the hollow plate of the back sidewall.

[0009] In the above technical solution, the plurality of sidewalls forming the opening further include two horizontal sidewalls and two vertical sidewalls;

[0010] The two horizontal sidewalls are spaced apart along the height direction, and the two vertical sidewalls are spaced apart along the left and right direction; the horizontal sidewall located at the higher position is connected to the top of the two vertical sidewalls, and the horizontal sidewall located at the lower position is connected to the bottom of the two vertical sidewalls.

[0011] The circumferential edge of the back sidewall is connected to the ends of the two horizontal sidewalls and the two vertical sidewalls away from the opening.

[0012] Furthermore, the above technical solution also includes a guide component;

[0013] The guide member is spaced apart from the horizontal sidewall to form an insertion cavity; the insertion cavity is opposite to the plug-in interface provided on the circuit board, and the insertion cavity is in communication with the opening, so that the module under test can be placed in the insertion cavity and connected to the plug-in interface.

[0014] In the above technical solution, the guide component further includes a first guide plate and a second guide plate, which are respectively connected to the two vertical sidewalls to position the edge of the module to be tested.

[0015] Furthermore, the above technical solution also includes a lever handle;

[0016] The circuit board is provided with two insertion interfaces spaced apart; there are two guide members, and the two guide members are spaced apart from the two horizontal sidewalls to form two insertion cavities.

[0017] The pull rod handle is installed between the two guide members, and the pull rod handle is slidably connected to the two vertical sidewalls so that the pull rod handle can extend and retract relative to the opening.

[0018] In the above technical solution, the lever handle further includes a handle body, a rebound device, and a slide rail;

[0019] The two sides of the handle body are connected to the middle of the two vertical sidewalls via the slide rails. The rebound device is located on the side of the handle body away from the opening and is connected to the vertical sidewall.

[0020] Furthermore, the above technical solution also includes two gap-filling plates;

[0021] A gap is formed between the pull rod handle and the two guide members; the two gap-filling plates are located at the opening and are installed between the pull rod handle and the two guide members to cover the gap.

[0022] In the above technical solution, a further installation gap is provided between the perforated plate and the dustproof mesh of the horizontal sidewall, and a cooling fan is provided in the installation gap. The cooling fan is connected to the corresponding perforated plate to dissipate heat from the module under test in the adjacent insertion cavity.

[0023] This application also provides a testing system, including the test fixture chassis described in the above scheme.

[0024] Compared with the prior art, the beneficial effects of this application are as follows:

[0025] The test fixture chassis provided in the application is made of a lightweight aluminum alloy frame. While ensuring the stable support strength for the standard 6U-LRM architecture equipment, it reduces unnecessary parts other than supporting the 6U-LRM equipment, which greatly reduces the weight and size of the chassis, making it easy to carry. The chassis structure is also easy to assemble and disassemble.

[0026] This application also provides a testing system, including the testing fixture chassis described in the above scheme. Based on the above analysis, it is clear that the testing system also possesses the aforementioned beneficial effects, which will not be elaborated upon further here. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the first internal structure of the test fixture chassis provided in this application;

[0029] Figure 2 A schematic diagram of the external structure of the test fixture chassis provided in this application;

[0030] Figure 3 This is a schematic diagram of the circuit board structure provided in this application;

[0031] Figure 4 A schematic diagram of the test fixture chassis provided in this application for testing LRM connectors;

[0032] Figure 5 A schematic diagram of the second internal structure of the test fixture chassis provided in this application.

[0033] In the diagram: 1-Back sidewall; 2-Circuit board; 3-Vertical sidewall; 4-Perforated plate of horizontal sidewall; 5-Cooling fan; 6-Interface; 7-First guide plate; 8-Rebounder; 9-Gap filler plate; 10-Handle body; 11-Pulley; 12-Rail; 13-Support protrusion; 14-Horizontal sidewall; 15-Second guide plate; 16-Perforated plate of vertical sidewall; 17-Dustproof mesh of vertical sidewall; 18-LED light strip; 19-FPGA chip; 20-Optical module port; 21-Gigabit Ethernet port; 22-RS232 serial port; 23-RS485 serial port; 24-LRM connector. Detailed Implementation

[0034] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] Example 1

[0038] See Figures 1 to 5As shown, the test fixture chassis provided in this application is used for testing the module under test, specifically a 6U LRM connector 24 (hereinafter referred to as LRM connector 24). The test fixture chassis includes a circuit board 2 and multiple side walls. Each side wall includes a perforated plate and a dustproof mesh. The perforated plates of multiple side walls are connected to form a housing for the LRM connector 24. The perforated plate is the main supporting structure of the side walls, specifically a lightweight aluminum alloy frame. The housing formed by the perforated plate reduces the weight of the device while ensuring stable support for the LRM connector 24. Furthermore, the perforated structure of the perforated plate facilitates heat dissipation. A dustproof mesh, made of aluminum alloy, covers the outside of the perforated plate and can be fixed to the outside of the perforated plate with screws. This mesh serves to prevent dust accumulation and dissipate heat from the housing.

[0039] The enclosure has an opening on one side, allowing the module under test (DUT) to be placed inside through the opening. Circuit board 2 is mounted inside the enclosure and is used to connect to the DUT. Circuit board 2 is connected to a perforated plate on the back side wall 1, which is the side wall furthest from the opening. When testing the DUT, it can be placed inside the enclosure through the opening. Once fully inserted, the DUT connects to the connector 6 on the circuit board 2 mounted on the back side wall 1, thus enabling the testing of the DUT.

[0040] Specifically, circuit board 2 is equipped with a Xillin 7 series FPGA chip 19 to implement the algorithm logic of the test program. It also includes external interfaces such as four optical module ports 20, one gigabit Ethernet port 21, one RS232 serial port 22, one RS485 serial port 23, one 24V pin header, a 5V fan power supply and LED strip output interface 18, and two LRM module interfaces 6. The LRM module interfaces can achieve LVDS, GTX high-speed port, and LVTTL interface communication. Operators can use these interfaces to perform data communication between the host computer, the tooling platform, and the 6U-LRM device to achieve testing, inspection, and troubleshooting of the 6U-LRM device.

[0041] The test fixture chassis provided in this application is composed of a lightweight aluminum alloy frame. While ensuring the stable support strength for the standard 6U-LRM architecture equipment, it reduces unnecessary parts other than supporting the 6U-LRM equipment, greatly reducing the weight and size of the chassis, making it easy to carry, and the chassis structure is easy to assemble and disassemble.

[0042] In an optional embodiment, the perforated plate of the back sidewall 1 has multiple support protrusions 13 arranged at intervals. The circuit board 2 is connected to the multiple support protrusions 13 to fix the circuit board 2. In practical applications, the perforated plate has 16 support protrusions 13 with threaded holes to support and fix the circuit board 2. Furthermore, a receiving gap is formed between the circuit board 2 and the perforated plate of the back sidewall 1, thereby providing space for devices mounted on the side of the circuit board 2 facing the back sidewall 1.

[0043] In an optional embodiment, multiple sidewalls are connected to each other by screws. For example... Figure 2 As shown, the multiple sidewalls that enclose the opening include two horizontal sidewalls 14 and two vertical sidewalls 3; the two horizontal sidewalls 14 are spaced apart along the height direction, and the two vertical sidewalls 3 are spaced apart along the left and right direction; the horizontal sidewalls 14 located at the higher position are connected to the top of the two vertical sidewalls 3, and the horizontal sidewalls 14 located at the lower position are connected to the bottom of the two vertical sidewalls 3; the circumferential edge of the back sidewall 1 is connected to the ends of the two horizontal sidewalls 14 and the two vertical sidewalls 3 away from the opening, thereby enclosing a box with a cubic structure, which has the advantages of structural stability and easy placement.

[0044] In this embodiment, vertical sidewalls 3 are symmetrically installed on the left and right sides of the enclosure, and horizontal sidewalls 14 are symmetrically installed on the top and bottom sides of the enclosure, allowing the enclosure to be placed stably in five directions. The perforated plate 16 of the vertical sidewalls adopts a "prisoner" shaped design, which, while maintaining sufficient support beam strength, eliminates non-load-bearing area, reduces weight, and provides ample space for installation and operation. The vertical sidewalls 3 serve as the main support structure of the enclosure, providing fixed support for other components and acting as a support point between the enclosure and the desktop. The perforated plate 16 of the vertical sidewalls has guide rails at its top and bottom for inserting the dust cover net of the horizontal sidewalls 14, and the surface of the perforated plate 16 of the vertical sidewalls also has corresponding grooves for embedding the dust cover net. An LED light strip 18 is attached to the dust cover net 17 of the vertical sidewalls; when the enclosure is started, the light strip flashes in a breathing light pattern, and the device supports controlling the flashing pattern of the light strip through an internal program.

[0045] In an optional embodiment, the test fixture chassis further includes a guide member; the guide member is spaced apart from the horizontal sidewall 14 to form an insertion cavity; the insertion cavity is opposite to the insertion interface 6 provided on the circuit board 2, and the insertion cavity is connected to the opening, so that the module under test can be placed in the insertion cavity and connected to the insertion interface 6. When the module under test is placed in the chassis, the guide member can guide the movement direction of the module under test, so that the module under test can be accurately inserted into the insertion interface 6 provided on the circuit board 2, avoiding misalignment of the LRM connector 24 and causing a loose connection or damage to the device. Optionally, a pull-out aid slot is provided on the side of the vertical sidewall 3 near the opening to facilitate the installation and removal of the LRM connector 24.

[0046] like Figure 3 and Figure 4 As shown, the circuit board 2 is provided with two spaced-apart insertion interfaces 6; the number of guide members is also set to two, and the upper and lower guide members are spaced apart from the upper and lower horizontal sidewalls 14 to form two insertion cavities. The upper guide member can guide and support the LRM connector 24, while the lower guide member only guides the LRM connector 24.

[0047] In an optional embodiment, the guide includes a first guide plate 7 and a second guide plate 15. The first guide plate 7 and the second guide plate 15 are respectively connected to two vertical sidewalls 3 for edge positioning of the module under test, ensuring support strength while reducing the weight of the guide. Both the first guide plate 7 and the second guide plate 15 are triangular hollow angle irons and are installed inside the hollow plate 16 of the vertical sidewalls by screws. The edges of the first guide plate 7 and the second guide plate 15 are rounded and polished to avoid scratching their surfaces when the LRM connector 24 is inserted.

[0048] In an optional embodiment, an installation gap is provided between the perforated plate 4 on the horizontal sidewall and the dustproof mesh. A cooling fan 5 is installed in the installation gap and is connected to the corresponding perforated plate to dissipate heat from the adjacent insertion cavity of the module under test.

[0049] In this embodiment, the two horizontal sidewall perforated plates 4 are connected to the upper and lower ends of the vertical sidewall perforated plate 16 by screws, which can provide vertical support and positioning for the LRM connector 24. The edges of the horizontal sidewall perforated plates 4 are rounded and polished to prevent scratching of the LRM connector 24 housing during installation. Specifically, the horizontal sidewall perforated plates 4 are provided with eight threaded holes for mounting two cooling fans 5. The two cooling fans 5 are spaced apart along the length of the horizontal sidewall 14 to cool the LRM connector 24 during testing.

[0050] Example 2

[0051] The test fixture chassis in this embodiment is an improvement on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this embodiment.

[0052] See Figure 2 and Figure 5As shown, in an optional embodiment, the test fixture chassis also includes a pull handle; the pull handle is installed between two guide members and slidably connected to the two vertical side walls 3, allowing the pull handle to extend and retract relative to the opening. The chassis is equipped with a pull handle for easy carrying and transport by hand. When not in use, the pull handle can retract into the chassis to avoid protruding and occupying space.

[0053] In the optional solutions of this embodiment, specifically as follows: Figure 1 As shown, the lever handle includes a handle body 10, a rebounder 8, and a slide rail. The two sides of the handle body 10 are connected to the middle of two vertical sidewalls 3 via the slide rail. The rebounder 8 is located on the side of the handle body 10 away from the opening and is connected to the vertical sidewall 3.

[0054] In this embodiment, the handle body 10 is made of aluminum alloy, which ensures strength while being lightweight. The slide rail includes a track 12 and pulleys 11 slidably mounted on the track 12. The pulleys 11 are rollers with screws. A total of six pulleys 11 are installed on the left and right sides of the handle body 10. The track 12 is a sliding elongated hole opened in the hollow plate 16 of the vertical side wall. The pulleys 11 can pass through the sliding elongated hole from the outside of the hollow plate to connect with the outside of the handle body 10. In use, the pulleys 11 on the left and right sides of the handle body 10 slide within the corresponding track 12.

[0055] In addition, a LAMP-ML-30SBR type rebound device 8 is specifically installed on the vertical sidewall 3. A magnetic plate is attached to the end of the handle body 10 away from the opening, for adhering to the magnetic contacts on the rebound device 8. The rebound device 8 is mounted to the perforated plate 16 of the vertical sidewall by screws, and its magnetic contacts contact the magnetic plate of the handle body 10. When the user presses the handle body 10 from the outside, the rebound device 8 is triggered, thereby pushing the handle body 10 backward, allowing the user to pull out the handle body 10.

[0056] In an optional embodiment, the test fixture chassis also includes two gap-filling plates 9; gaps are formed between the pull rod handle and the two guide members; the two gap-filling plates 9 are located at the opening and are installed between the pull rod handle and the two guide members to cover the gaps.

[0057] In this embodiment, because the circuit board 2 has two spaced-apart connectors 6, and the distance between the two connectors 6 is relatively large, gaps are formed between the insertion cavity for mounting the LRM connector 24 and the pull rod handle. Two gap-filling plates 9 are respectively installed in the upper and lower gaps to prevent foreign objects from entering the housing and causing damage to the circuit board 2. Specifically, the gap-filling plate 9 is a rectangular aluminum alloy sheet and is fixed to the guide member with screws.

[0058] Example 3

[0059] This application provides a test system in embodiment three, which includes the test fixture chassis of any of the above embodiments. Therefore, it has all the beneficial technical effects of the test fixture chassis of any of the above embodiments, which will not be repeated here.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

Claims

1. A test handler cabinet for testing a module under test, characterized by, The test tool box comprises a circuit board and a plurality of side walls; The side walls comprise hollow plates and dustproof screens; the hollow plates of the plurality of side walls are connected to form a box with an opening on one side, so that the to-be-tested module can be placed in the box through the opening; the dustproof screens are installed on the outer sides of the corresponding hollow plates; The circuit board is installed in the box and used to connect with the to-be-tested module; the circuit board is connected with the hollow plate of the back side wall, which is the side wall away from the opening.

2. The test tooling enclosure of claim 1, wherein, A plurality of support protrusions are arranged on the hollow plate of the back side wall at intervals, and the circuit board is connected with the support protrusions, so that a containing gap is formed between the circuit board and the hollow plate of the back side wall.

3. The test handler cassette of claim 1, wherein, The plurality of side walls forming the opening comprise two horizontal side walls and two vertical side walls; The two horizontal side walls are arranged at intervals in the height direction, and the two vertical side walls are arranged at intervals in the left-right direction; the horizontal side wall at the high position is connected with the top of the two vertical side walls, and the horizontal side wall at the low position is connected with the bottom of the two vertical side walls; The circumferential edge of the back side wall is connected with the two horizontal side walls and the two vertical side walls away from the opening.

4. The test handler cassette of claim 3, wherein, Further comprising a guide piece; The guide piece is arranged at intervals with the horizontal side walls to form a placing cavity; the placing cavity is opposite to the plug-in interface provided by the circuit board, and the placing cavity is communicated with the opening, so that the to-be-tested module can be placed in the placing cavity and connected with the plug-in interface.

5. The test handler cassette of claim 4, wherein, The guide piece comprises a first guide plate and a second guide plate, and the first guide plate and the second guide plate are respectively connected with the two vertical side walls to position the edges of the to-be-tested module.

6. The test handler cassette of claim 4, wherein, Further comprising a pull rod handle; The circuit board is provided with two plug-in interfaces arranged at intervals; the number of the guide pieces is two, and the two guide pieces are respectively arranged at intervals with the two horizontal side walls to correspondingly form two placing cavities; The pull rod handle is installed between the two guide pieces, and the pull rod handle is slidingly connected with the two vertical side walls, so that the pull rod handle can be stretched and retracted relative to the opening.

7. The test handler cassette of claim 6, wherein, The pull rod handle comprises a handle body, a rebounder and a slide rail; The two sides of the handle body are connected with the middle parts of the two vertical side walls through the slide rails, the rebounder is located on the side of the handle body away from the opening, and the rebounder is connected with the vertical side walls.

8. The test handler cassette of claim 6, wherein, Further comprising two empty space plates; The pull rod handle and the two guide pieces form gaps therebetween; the two empty space plates are located at the opening and installed between the pull rod handle and the two guide pieces to shield the gaps.

9. The test handler cassette of claim 4, wherein, An installation gap is arranged between the hollow plate and the dustproof screen of the horizontal side wall, a heat dissipation fan is arranged in the installation gap, and the heat dissipation fan is connected with the corresponding hollow plate to dissipate heat for the to-be-tested module in the adjacent placing cavity.

10. A test system, characterized by The test tool box comprises a circuit board and a plurality of side walls; The side walls comprise hollow plates and dustproof screens; the hollow plates of the plurality of side walls are connected to form a box with an opening on one side, so that the to-be-tested module can be placed in the box through the opening; the dustproof screens are installed on the outer sides of the corresponding hollow plates; The circuit board is installed in the box and used to connect with the to-be-tested module; the circuit board is connected with the hollow plate of the back side wall, which is the side wall away from the opening. A plurality of support protrusions are arranged on the hollow plate of the back side wall at intervals, and the circuit board is connected with the support protrusions, so that a containing gap is formed between the circuit board and the hollow plate of the back side wall. The plurality of side walls forming the opening comprise two horizontal side walls and two vertical side walls; The two horizontal side walls are arranged at intervals in the height direction, and the two vertical side walls are arranged at intervals in the left-right direction; the horizontal side wall at the high position is connected with the top of the two vertical side walls, and the horizontal side wall at the low position is connected with the bottom of the two vertical side walls; The circumferential edge of the back side wall is connected with the two horizontal side walls and the two vertical side walls away from the opening. Further comprising a guide piece; The guide piece is arranged at intervals with the horizontal side walls to form a placing cavity; the placing cavity is opposite to the plug-in interface provided by the circuit board, and the placing cavity is communicated with the opening, so that the to-be-tested module can be placed in the placing cavity and connected with the plug-in interface. The guide piece comprises a first guide plate and a second guide plate, and the first guide plate and the second guide plate are respectively connected with the two vertical side walls to position the edges of the to-be-tested module. Further comprising a pull rod handle; The circuit board is provided with two plug-in interfaces arranged at intervals; the number of the guide pieces is two, and the two guide pieces are respectively arranged at intervals with the two horizontal side walls to correspondingly form two placing cavities; The pull rod handle is installed between the two guide pieces, and the pull rod handle is slidingly connected with the two vertical side walls, so that the pull rod handle can be stretched and retracted relative to the opening. The pull rod handle comprises a handle body, a rebounder and a slide rail; The two sides of the handle body are connected with the middle parts of the two vertical side walls through the slide rails, the rebounder is located on the side of the handle body away from the opening, and the rebounder is connected with the vertical side walls. Further comprising two empty space plates; The pull rod handle and the two guide pieces form gaps therebetween; the two empty space plates are located at the opening and installed between the pull rod handle and the two guide pieces to shield the gaps. An installation gap is arranged between the hollow plate and the dustproof screen of the horizontal side wall, a heat dissipation fan is arranged in the installation gap, and the heat dissipation fan is connected with the corresponding hollow plate to dissipate heat for the to-be-tested module in the adjacent placing cavity. The test tool box comprises a circuit board and a plurality of side walls; The side walls comprise hollow plates and dustproof screens; the hollow plates of the plurality of side walls are connected to form a box with an opening on one side, so that the to-be-tested module can be placed in the box through the opening; the dustproof screens are installed on the outer sides of the corresponding hollow plates; The circuit board is installed in the box and used to connect with the to-be-tested module; the circuit board is connected with the hollow plate of the back side wall, which is the side wall away from the opening. A plurality of support protrusions are arranged on the hollow plate of the back side wall at intervals, and the circuit board is connected with the support protrusions, so that a containing gap is formed between the circuit board and the hollow plate of the back side wall.

Images