Protection box for high magnetic field chip test

Abstract

The utility model discloses a protection box for high magnetic field chip test, which is used for installing a chip test carrier plate and comprises a shielding box body and an end cover, an accommodating cavity is arranged in the shielding box body, at least one end of the accommodating cavity is open, and the end cover is detachably and fixedly connected to one side of the opening of the accommodating cavity. The end cover is provided with a through groove corresponding to an opening of the containing cavity, the wall of the containing groove is provided with a clamping groove, the groove wall of the through groove is provided with a slot corresponding to the clamping groove, one end, provided with an electronic component, of the chip testing carrier plate penetrates through the slot and then is inserted into the clamping groove, and one end, provided with a chip to be tested, of the chip testing carrier plate is located outside the shielding box body. According to the protection box for the high-magnetic-field chip test, the magnetic shielding effect on the electronic components can be realized only by inserting the electronic components on the chip test carrier plate into the clamping grooves of the shielding box body in a matched manner, the operation is simple, the installation is convenient, and the test efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chip detection, and particularly to a protection box for high-magnetic-field chip testing. Background Art

[0002] A printed circuit board (PCB) is also known as a printed circuit board or printed wiring board, and is an important part for the physical support and signal transmission of electronic products. With the continuous progress of technology, chips are widely used in various industries, including aerospace, medical equipment, automotive electronics, etc. In order to ensure the reliable and stable operation of the chips, performance testing of the chips is required before they are officially put into production. Chip testing uses a chip test board, such as an ATE (AutoTest Equipment) test board, also known as a chip test carrier board, which is an interface circuit board dedicated to connecting the chip under test and the test equipment and testing its performance. Figure 1 The structure of a chip test carrier board 100 is shown. It generally has a convex shape. The narrower end is used to install the chip under test 101, and the wider end is installed with various electronic components 102 such as capacitors required for the normal operation of the chip test carrier board. During testing, the chip under test 101 is installed at the narrower end for testing. In the actual operation of the chip, the chip is often required to be able to adapt to the use in a high-magnetic-field environment. Therefore, it becomes increasingly important to test the chip in a high-magnetic-field environment. However, since the magnetic field will have an adverse effect on the above-mentioned electronic components on the test carrier board, when testing the chip, it is necessary to protect the electronic components 102. The traditional method is to make multiple protective covers slightly larger than each electronic component 102 and cover each electronic component 102 to achieve the electromagnetic shielding effect. This method requires making a separate protective cover for each type of electronic component 102 and installing it on the surface of the chip test carrier board 100. The production is relatively troublesome and not easy to install, greatly reducing the test efficiency of the chip. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is that in the prior art, by using the method of separately shielding each electronic component with a protective cover, the production and installation of the protective cover are relatively troublesome. Based on this, the utility model provides a protection box for high-magnetic-field chip testing that can facilitate the installation of the chip test carrier board, has high structural strength, and is reliable in use.

[0004] The technical solution adopted by the present utility model to solve its technical problems is as follows: A protection box for high magnetic field chip testing, which is used to install a chip testing carrier board. The protection box for high magnetic field chip testing includes a shielding box body and an end cover. A receiving cavity is provided inside the shielding box body. At least one end of the receiving cavity is open. The end cover is detachably and fixedly connected to the opening side of the receiving cavity. A through groove is provided on the end cover corresponding to the opening of the receiving cavity. A clamping groove is formed on the wall of the receiving cavity. A slot is provided on the groove wall of the through groove corresponding to the clamping groove. One end of the chip testing carrier board with electronic components passes through the slot and is inserted into the clamping groove. One end of the chip testing carrier board with the chip to be tested is located outside the shielding box body.

[0005] Further, the shielding box body has a hollow cylindrical structure, the end cover has an annular structure, the end cover is coaxially arranged with the shielding box body, and the outer diameter of the shielding box body is smaller than the outer diameter of the end cover.

[0006] Further, the shielding box body and the end cover are connected by bolts. A plurality of threaded holes are provided on one side of the shielding box body close to the end cover. A plurality of stepped holes are provided on the end cover. The tail of the bolt passes through the stepped hole and is threadedly connected to the threaded hole. The head of the bolt is located in the stepped hole.

[0007] Further, a plurality of mounting holes for connecting with a fixing frame are provided on the end cover.

[0008] Further, the receiving cavity is a square cavity, and fillets are provided at the four corners of the receiving cavity. A chamfer is provided between the fillet and the flat wall of the receiving cavity.

[0009] Further, there are two clamping grooves, which are provided on two opposite groove walls of the receiving cavity.

[0010] Further, the clamping groove has a rectangular structure, and the plane where one groove wall of the clamping groove is located passes through the central axis of the shielding box body.

[0011] Further, the shielding box body is made of aluminum.

[0012] The beneficial effects of the present utility model are as follows: For the protection box for high magnetic field chip testing of the present utility model, the tester only needs to insert the chip testing carrier board with electronic components into the clamping groove of the shielding box body to achieve the magnetic shielding effect on the electronic components. Compared with the traditional operation method of covering each electronic component with a separate protective cover, the protection box of the present utility model is simpler to operate, easier to install, and has high structural strength, greatly improving the testing efficiency and use reliability. Description of the Drawings

[0013] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic structural diagram of a chip test carrier board applicable to the protection box for high magnetic field chip testing of the present utility model;

[0015] Figure 2 It is an exploded view of the protection box for high magnetic field chip testing of the present utility model;

[0016] Figure 3 is Figure 2 The front view of the shielding box body in the protection box for high magnetic field chip testing shown;

[0017] Figure 4 is Figure 2 The front view of the end cover in the protection box for high magnetic field chip testing shown.

[0018] In the figure: 100, chip test carrier board; 101, chip to be tested; 102, electronic components; 1, shielding box body; 11, accommodating cavity; 110, card slot; 111, fillet; 112, chamfer; 12, threaded hole; 2, end cover; 21, through slot; 210, slot; 22, stepped hole; 23, mounting hole; 3, bolt. Specific embodiments

[0019] Now, the present utility model will be described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic manner, so it only shows the components related to the present utility model.

[0020] Please refer to Figures 1 - 4 , the present utility model provides a protection box for high magnetic field chip testing, which is used to install a chip test carrier board 100. The protection box includes a shielding box body 1 and an end cover 2. The shielding box body 1 is made of a magnetic shielding material. An accommodating cavity 11 is provided inside the shielding box body 1. At least one end of the accommodating cavity 11 is open. The end cover 2 is detachably and fixedly connected to the open side of the accommodating cavity 11. A through slot 21 is opened on the end cover 2 corresponding to the opening of the accommodating cavity 11. A slot 210 is opened on the wall of the through slot 21 corresponding to the card slot 110. One end of the chip test carrier board 100 having electronic components 102 such as capacitors passes through the slot 210 and is inserted into the card slot 110. One end of the chip test carrier board 100 having the chip to be tested 101 is located outside the shielding box body 1.

[0021] The protection box for high magnetic field chip testing of the present utility model, during installation, the end cover 2 is fixedly installed on a fixing frame (not shown in the figure). The fixing frame is used to fix the end cover 2. The fixing frame is generally in a flat plate-like structure and is provided with a notch aligned with the through slot 21. The end face of the end cover 2 away from the shielding box body 1 is fixedly connected to the fixing frame. Then, one end of the chip testing carrier board 100 with electronic components 102 ( Figure 1 the part within the dashed box in) is aligned with the slot 210 and inserted, and finally inserted into the card slot 110, thereby installing the chip testing carrier board 100 on the protection box. After installation in place, the electronic components 102 are received in the accommodation cavity 11. During use, the protection box is placed in a high magnetic field environment together with the fixing frame. The shielding box body 1 made of magnetic shielding material can shield electromagnetic fields, effectively preventing electromagnetic interference to the electronic components 102. And the chip under test 101 installed at the other end of the chip testing carrier board 100 is located outside the shielding box body 1 and is exposed to a strong magnetic field environment for facilitating the detection of the chip under test 101.

[0022] For cost reduction and to reduce the weight of the shielding box body 1, usually on the premise of meeting the test requirements, the wall of the shielding box body 1 is designed to be relatively thin, resulting in easy deformation at the opening of the accommodation groove 11. Installing the end cover 2 at the opening of the shielding box body 1 can enhance the structural strength of the end of the shielding box body 1, making the shielding box body 1 not easily deformed, which is beneficial to improving the installation reliability of the chip testing carrier board 100. In this embodiment, the shielding box body 1 is made of aluminum, which can achieve good shielding effect and also realize the lightweight production of the shielding box body 1.

[0023] As a preferred embodiment, the shielding box body 1 is in a hollow cylindrical structure, and the end cover 2 is in an annular structure. The end cover 2 is coaxially arranged with the shielding box body 1, and the outer diameter of the shielding box body 1 is smaller than the outer diameter of the end cover 2. To ensure the fit between the accommodation cavity 11 of the shielding box body 1 and the through slot 21 of the end cover 2, the shape and size of the accommodation cavity 11 are the same as those of the through slot 21, and the shape and size of the card slot 110 are also the same as those of the slot 210. Thus, the area of the end plane of the end cover 2 is larger than the area of the end plane of the opening end of the shielding box body 1. Compared with directly connecting the end cover 2 to the fixing frame, connecting the end cover 2 to the fixing frame increases the connection area, thereby making the connection between the protection box and the fixing frame more stable and with higher reliability.

[0024] In this embodiment, the accommodating cavity 11 is generally a square cavity. Fillets 111 are provided at the four corners of the accommodating cavity 11. A chamfer 112 is provided between the fillet 111 and the planar cavity wall of the accommodating cavity 11. The chamfer 112 is smoothly connected to the planar cavity wall and the fillet 111 of the accommodating cavity 11, reducing internal stress, ensuring the structural strength of the shielding box 1, and preventing easy cracking at the corners. In addition, the provision of the fillet 111 increases the wall thickness of the shielding box 1 corresponding to the fillet 111, further reducing the risk of deformation.

[0025] In addition, the shielding box 1 and the end cover 2 are fixedly connected by bolts 3. Specifically, a plurality of threaded holes 12 are provided on one side of the shielding box 1 close to the end cover 2, and a plurality of stepped holes 22 are provided on the end cover 2. The tail of the bolt 3 passes through the stepped hole 22 and is threadedly connected to the threaded hole 12. In addition, the head of the bolt 3 is located in the stepped hole 22 to ensure that the bolt 3 does not protrude to the outside of the end face on the side of the end cover 2 away from the shielding box 1, so that the end cover 2 and the fixed frame can be fully attached, thereby enhancing the connection strength between the end cover 2 and the fixed frame. In this embodiment, there are four bolts 3, which are evenly arranged along the circumference of the shielding box 1 to ensure uniform stress. In addition, the bolt 3 is made of copper, and copper is a non-magnetic material with high structural strength, which is beneficial to ensuring the connection strength.

[0026] Furthermore, a plurality of mounting holes 23 are also provided on the end cover 2. The mounting holes 23 are used to connect to the fixed frame. Specifically, during connection, the end cover 2 can be mounted on the fixed frame through the mounting holes 23 by fasteners such as fastening bolts or screws. In this embodiment, there are six mounting holes 23, which are arranged on the end cover along the circumference of the end cover 2.

[0027] As a preferred embodiment, there are two card slots 110, which are provided on two opposite slot walls of the accommodating cavity 11. When installing the chip test carrier board 100, the opposite sides of the wider end of the chip test carrier board 100 (i.e., the end for installing the electronic components 102) are respectively inserted into the card slots 110.

[0028] In addition, the card slot 110 is a rectangular structure, and the plane of one slot wall of the card slot 110 passes through the central axis of the shielding box 1. For specific reference, see Figure 3, wherein, the plane where the upper edge of the card slot 110 is located passes through the central axis of the shielding box body 1. The purpose of such design is that when the protection box of the present utility model is fixedly connected to the fixing frame, the fixing frame will rotate under the action of a rotating device such as a motor, and then the chip under test 101 will rotate around the central axis of the shielding box body 1, so that the chip test carrier board 100 fully acts with the magnetic field. After the chip test carrier board 100 is installed in place, the plane for installing the chip under test 100 on the chip test carrier board 100 fits with the groove wall of the card slot 110 passing through the central axis of the shielding box body 1. In this way, the vertical distance between the chip under test 101 and the central axis of the shielding box body 1 is reduced, thereby reducing the centrifugal force received by the chip under test 101, and thus ensuring the installation stability between the chip under test 101 and the chip test carrier board 100.

[0029] In addition, the size of the card slot 110 matches the size of the chip test carrier board 100, so that the chip test carrier board 100 can be reliably inserted into the card slot 110.

[0030] For the protection box for high magnetic field chip testing of the present utility model, the tester only needs to insert the chip test carrier board 100 with the electronic component 102 cooperatively into the card slot 110 of the shielding box body 1 to achieve the magnetic shielding effect on the electronic component 102. Compared with the traditional operation mode of covering each electronic component 102 with a separate protective cover, the protection box of the present utility model is simpler to operate, easier to install, and has high structural strength, greatly improving the test efficiency and use reliability.

[0031] Inspired by the above ideal embodiments according to the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the scope of the present utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A protection box for high magnetic field chip testing, used for installing a chip test carrier board, characterized in that: The protection box for high magnetic field chip testing includes a shielding box body and an end cover. A receiving cavity is provided inside the shielding box body. The receiving cavity is open at least at one end. The end cover is detachably and fixedly connected to the opening side of the receiving cavity. A through groove is provided on the end cover corresponding to the opening of the receiving cavity. A clamping groove is formed on the wall of the receiving cavity. A slot is provided on the wall of the through groove corresponding to the clamping groove. One end of the chip testing carrier board with electronic components passes through the slot and is inserted into the clamping groove. One end of the chip testing carrier board with the chip to be tested is located outside the shielding box body.

2. The protective box for high magnetic field chip testing according to claim 1, characterized in that: The shielding box body is in a hollow cylindrical structure, and the end cover is in an annular structure. The end cover is coaxially arranged with the shielding box body, and the outer diameter of the shielding box body is smaller than the outer diameter of the end cover.

3. The protective box for high magnetic field chip testing according to claim 2, wherein: The shielding box body and the end cover are connected by bolts. A plurality of threaded holes are provided on one side of the shielding box body close to the end cover. A plurality of stepped holes are provided on the end cover. The tail of the bolt passes through the stepped hole and is threadedly connected to the threaded hole. The head of the bolt is located in the stepped hole.

4. The protective box for high magnetic field chip testing according to claim 2, wherein: A plurality of mounting holes for connecting with a fixing frame are provided on the end cover.

5. The protective box for high magnetic field chip testing according to claim 1, characterized in that: The receiving cavity is a square cavity, and rounded corners are provided at the four corners of the receiving cavity. A fillet is provided between the rounded corner and the flat wall of the receiving cavity.

6. The protective box for high magnetic field chip testing according to claim 2, characterized in that: There are two clamping grooves, which are provided on two opposite groove walls of the receiving cavity.

7. The protective box for high magnetic field chip testing according to claim 6, characterized in that: The clamping groove is in a rectangular structure, and the plane of one groove wall of the clamping groove passes through the central axis of the shielding box body.

8. The protective box for high magnetic field chip testing according to claim 1, characterized in that: The shielding box body is made of aluminum.

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