Misplug prevention device for integrated circuit test board
By designing foolproof slots and identification pins, and combining resistance detection to cut off power in a timely manner, the problem of incorrect insertion during integrated circuit testing is solved, achieving efficient and low-cost protection against incorrect insertion.
Patent Information
- Application Number
- CN202423246185.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-25
AI Technical Summary
During integrated circuit testing, the small spacing between the motherboard test sockets of multiple DUT daughter boards can lead to the risk of incorrect insertion, affecting the accuracy and efficiency of test results, potentially causing device damage, and increasing maintenance costs.
The design includes a first anti-misplacement slot, a second anti-misplacement slot, a first anti-misplacement block, and a second anti-misplacement block. Combined with a first identification pin, a second identification pin, and a detection component, it detects incorrect insertion and cuts off power in time by detecting resistance. An adjustable resistor component is used to adjust the resistance value to adapt to different test sockets.
It effectively avoids incorrect insertion, protects components, improves testing accuracy and efficiency, reduces costs, and minimizes the risk of physical damage.
Smart Images
Figure CN223770246U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of integrated circuit testing tooling technology, specifically relating to an integrated circuit test board anti-misinsertion device. Background Technology
[0002] During integrated circuit testing, to ensure that the functionality and performance of the device under test (DUT) meet design specifications, it is typically necessary to insert the DUT daughter board into the corresponding test socket on the DUT mother board. However, in practice, when multiple DUT daughter boards are present and the spacing between the test sockets on the DUT mother board is small, there is a risk of incorrect insertion: operators may mistakenly insert the daughter board into the wrong interface or position. This not only leads to inaccurate test results but also reduces testing efficiency and may cause physical damage to the DUT board and the DUT, increasing repair frequency and costs, and affecting the normal operation of the production line.
[0003] To solve the above problems, there is an urgent need for an effective foolproof insertion device. Utility Model Content
[0004] The present invention aims to provide an anti-misinsertion device for integrated circuit test boards to solve the problem of easy misinsertion in existing DUT testing.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An anti-misinsertion device for an integrated circuit test board includes a motherboard and a daughterboard. The motherboard has several sockets, each corresponding to a different test unit on the motherboard. The daughterboard has plugs for connecting to the sockets. Each plug includes a first identification pin, and a first adjustable resistor assembly is connected between the first identification pins. The motherboard has a detection assembly, which includes a controller, an indicator light, a constant current source, a voltage comparator, a second adjustable resistor assembly, and a relay. Each socket has a second identification pin corresponding to the first identification pin. The constant current source is connected to the second identification pin and the second adjustable resistor assembly. The second adjustable resistor assembly has the same structure as the first adjustable resistor assembly. The voltage comparator is used to compare the voltage of the second identification pin and the voltage of the second adjustable resistor assembly. The voltage comparator, indicator light, and relay are all electrically connected to the controller, which controls the on / off state of the indicator light and relay based on the signal from the voltage comparator.
[0007] Furthermore, the plug is provided with a plurality of first anti-mistake slots, and the socket is provided with a second anti-mistake slot corresponding to the position of the first anti-mistake slot. It also includes a plurality of first anti-mistake blocks and a plurality of second anti-mistake blocks. The first anti-mistake blocks are used to insert into the first anti-mistake slots, and the second anti-mistake blocks are used to insert into the second anti-mistake blocks. When the socket and the plug are plugged in, the first anti-mistake blocks in the first anti-mistake slots and the second anti-mistake blocks in the second anti-mistake slots corresponding to the positions overlap in space.
[0008] Furthermore, the first anti-mistake groove is evenly distributed on the side wall of the plug.
[0009] Furthermore, the first and second error-proof blocks have the same structure and size.
[0010] Furthermore, the metal contact of the first identification pin is closer to the connection position with the socket than the other pins of the plug, and the metal contact of the second identification pin is closer to the connection position with the plug than the other pins of the socket. When the plug and socket are plugged in, the first and second identification pins connect and conduct earlier than the other pins.
[0011] Furthermore, the detection component also includes an alarm, which is electrically connected to the controller, and the alarm includes a horn and a warning light.
[0012] Furthermore, the first adjustable resistor assembly includes an coded switch and several resistors connected in parallel between multiple output terminals of the coded switch, and the coded switch is used to control the resistance value between the first identification pins.
[0013] Furthermore, the first adjustable resistor component is a rotary rheostat.
[0014] The technical principle and beneficial effects of this technical solution: Currently, some solutions avoid incorrect insertion by setting different socket structures for different test sockets. However, this presents problems with processing costs and versatility, and it cannot solve the problem of device damage caused by incorrect insertion. In this invention, by designing a first anti-misplacement slot, a second anti-misplacement slot, a first anti-misplacement block, and a second anti-misplacement block, the positions of the first and second anti-misplacement blocks can be adjusted according to actual conditions to achieve anti-misplacement treatment on the structure of different test sockets. Furthermore, the use of the first and second anti-misplacement blocks provides strong versatility, allows for targeted adjustments, and the mass-produced interface structure results in lower costs. On the other hand, this application designs a first identification pin, a second identification pin, a detection component, and an adjustable resistor component. Different resistance values can be set for different test sub-boards. By detecting the voltage across the resistor, it is possible to determine if there is incorrect insertion, and a relay can promptly cut off the power supply to prevent damage to the test board or the device under test. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of an embodiment of the anti-misinsertion device for an integrated circuit test board according to the present invention;
[0016] Figure 2 This is a schematic diagram of the plug structure of an embodiment of the anti-misinsertion device for an integrated circuit test board according to this utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the first anti-misinsertion block in an embodiment of an integrated circuit test board anti-misinsertion device of the present invention;
[0018] Figure 4 This is an electrical block diagram of an embodiment of an integrated circuit test board anti-misinsertion device according to the present invention;
[0019] Figure 5 This is a circuit diagram of the first adjustable resistor component in an embodiment of an integrated circuit test board anti-misinsertion device of the present invention. Detailed Implementation
[0020] The following detailed description illustrates the specific implementation method:
[0021] The markings in the accompanying drawings of the instruction manual include: ribbon cable 1, plug 2, motherboard 3, socket 4, first foolproof slot 5, ear plate 6, pin 7, socket 8, and first foolproof block 9.
[0022] Example 1
[0023] The basic implementation examples are as follows: Figure 1 As shown: An anti-misinsertion device for an integrated circuit test board includes a motherboard 3 and a daughterboard. The motherboard 3 is provided with a plurality of sockets 4, each socket 4 corresponding to a different test unit on the motherboard 3. The daughterboard is provided with a plug 2 for connecting to the socket 4. In this embodiment, for ease of connection and use, the daughterboard and the plug 2 are connected by a ribbon cable 1.
[0024] The socket 4 is provided with a plurality of pins 7, and the plug 2 is provided with socket holes 8 corresponding to the position and number of the pins 7. Ear plates 6 are provided at both ends of the plug 2 for easy insertion and removal. A plurality of first anti-misplacement slots 5 are provided on the side wall of the plug 2, and the socket 4 is provided with second anti-misplacement slots corresponding to the positions of the first anti-misplacement slots 5. Specifically, in this embodiment, there are four first anti-misplacement slots 5 and four second anti-misplacement slots. The first anti-misplacement slots 5 are evenly distributed on the side wall of the socket 4, and the second anti-misplacement slots are evenly distributed on the inner side wall of the socket 4.
[0025] like Figure 2 As shown, the cross-section of the first anti-mistake slot 5 and the second anti-mistake slot is preferably "convex" shaped, and also includes a plurality of first anti-mistake blocks 9 and a plurality of second anti-mistake blocks, such as Figure 3As shown, its shape matches the first anti-mistake slot 5. The first anti-mistake block 9 is used to insert into the first anti-mistake slot 5, and the second anti-mistake block is used to insert into the second anti-mistake block. When the socket 4 is plugged into the plug 2, the first anti-mistake block 9 in the first anti-mistake slot 5 and the second anti-mistake block in the second anti-mistake slot overlap in space. In this embodiment, the first anti-mistake slot 5 and the second anti-mistake slot have the same shape and cross-sectional dimensions, and the corresponding first anti-mistake block 9 and the second anti-mistake block have the same structure and size. This eliminates the need to distinguish between the two separately, making it more convenient to use. In other embodiments of this application, the first anti-mistake slot 5 and the second anti-mistake slot can also have different shapes or sizes, and the corresponding first anti-mistake block 9 and the second anti-mistake block can also have different shapes and sizes.
[0026] Example 2
[0027] like Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the plug 2 includes a first identification pin, and a first adjustable resistor assembly is connected between the first identification pins;
[0028] The motherboard 3 is equipped with a detection component, which includes a controller, an indicator light, a constant current source, a voltage comparator, a second adjustable resistor assembly, and a relay. The socket 4 is provided with a second identification pin corresponding to the first identification pin. The constant current source is connected to the second identification pin and the second adjustable resistor assembly. The second adjustable resistor assembly has the same structure as the first adjustable resistor assembly. The voltage comparator is used to compare the voltage of the second identification pin and the voltage of the second adjustable resistor assembly. The voltage comparator, indicator light, and relay are all electrically connected to the controller. The controller is used to control the on / off state of the indicator light and relay according to the signal from the voltage comparator. In this embodiment, the controller is a microcontroller, preferably an STM32 series microcontroller. The constant current source output is a 1 mA constant current. The adjustment range of the first and second adjustable resistor components is 1K-10K. Different resistance values are set according to the test items corresponding to the current plug 2. For example, a 1K resistor corresponds to one test item, and a 2K resistor corresponds to another test item. For a test item, assuming the corresponding resistor is 1K, then the voltage drop corresponding to the 1K resistor is 1V. The voltage of the first adjustable resistor component is 1V, and the voltage of the second adjustable resistor component is 1V. The voltage comparator output should be 0. If they do not match, the two voltages are different, and the voltage comparator outputs a high level 1. The controller can determine whether there is a mis-insertion based on the output of the voltage comparator. After detecting a mis-insertion, it will activate the light indicator and de-energize the relay to avoid damaging other electronic components.
[0029] The metal contact of the first identification pin is closer to the connection position with the socket 4 than the other pins of the plug 2, and the metal contact of the second identification pin is closer to the connection position with the plug 2 than the other pins of the socket 4. When the plug 2 and the socket 4 are plugged in, the first identification pin and the second identification pin are connected and turned on earlier than the other pins, which can ensure the effectiveness of the relay de-energization.
[0030] The detection component also includes an alarm, which is electrically connected to the controller, and the alarm includes a horn and a warning light.
[0031] like Figure 5 As shown, in this embodiment, both the first and second adjustable resistor components include an coded switch and several resistors. The resistors are connected in parallel between multiple output terminals of the coded switch, and the coded switch is used to control the resistance value between two identification pins. In other embodiments of this application, the first and second adjustable resistor components are rotary rheostats.
[0032] The above are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. An integrated circuit test board misinsertion prevention device comprising a mother board and a daughter board, characterized by: The mother board is provided with a plurality of sockets, each of which is connected to a different test unit on the mother board, and the daughter board is provided with a plug for corresponding connection with the socket; the plug comprises first identification pins, and a first adjustable resistance assembly is connected between the first identification pins; The mother board is provided with a detection assembly, which comprises a controller, an indicator light, a constant current source, a voltage comparator, a second adjustable resistance assembly, and a relay; the socket is provided with second identification pins corresponding to the first identification pins, the constant current source is connected with the second identification pins and the second adjustable resistance assembly, the second adjustable resistance assembly has the same structure as the first adjustable resistance assembly, the voltage comparator is used to compare the voltage of the second identification pins and the voltage of the second adjustable resistance assembly, the voltage comparator, the indicator light, and the relay are all electrically connected with the controller, and the controller is used to control the on-off of the indicator light and the relay according to the signal of the voltage comparator.
2. The integrated circuit test board anti-misinsertion device of claim 1, wherein: The metal contact position of the first identification pin is closer to the connection position with the socket than the position of other pins of the plug, the metal contact position of the second identification pin is closer to the connection position with the plug than the position of other pins of the socket, and the first identification pin and the second identification pin are connected and conducted earlier than other pins when the plug and the socket are plugged in.
3. The integrated circuit test board anti-misinsertion device of claim 2, wherein: The detection assembly further comprises an alarm, which is electrically connected with the controller, and the alarm comprises a loudspeaker and a warning light.
4. The integrated circuit test board anti-misinsertion device of claim 3, wherein: The first adjustable resistance assembly comprises a coding switch and a plurality of resistors, the resistors are connected in parallel between a plurality of output terminals of the coding switch, and the coding switch is used to control the resistance value between the first identification pins.
5. The integrated circuit test board anti-misinsertion device of claim 3, wherein: The first adjustable resistance assembly is a rotary rheostat.
6. The integrated circuit test board anti-misinsertion device of claim 1, wherein: The plug is provided with a plurality of first foolproof slots, the socket is provided with second foolproof slots corresponding in position to the first foolproof slots, and the plug further comprises a plurality of first foolproof blocks and a plurality of second foolproof blocks, the first foolproof blocks are used to be inserted into the first foolproof slots, the second foolproof blocks are used to be inserted into the second foolproof slots, and when the socket and the plug are plugged in, the first foolproof blocks in the position corresponding first foolproof slots and the second foolproof blocks in the second foolproof slots overlap in space.
7. The integrated circuit test board anti-misinsertion device of claim 6, wherein: The first foolproof slots are uniformly arranged on the side wall of the plug.
8. The integrated circuit test board anti-misinsertion device of claim 7, wherein: The first foolproof blocks and the second foolproof blocks have the same structure and size.