Needle bed for testing circuit board
The circuit board testing fixture addresses the issue of board displacement by using a drive motor and limit blocks to secure and cushion the board, ensuring accurate testing through positional stability and protection.
Patent Information
- Application Number
- CN202421288987.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The existing circuit board test needle bed lacks restrictions when placing the circuit board and during the inspection process, resulting in small displacement of the circuit board, affecting the test accuracy.
A needle bed for circuit board testing is designed, which adopts a base, pressure plate, limit block, top column, and ejection components. The pressure plate lifting and lowering are controlled by driving motor and telescopic rod, and the limit card slot and limit block are combined to ensure that the circuit board does not displace during placement and detection, and provides protection during the detection process.
It effectively avoids the small amplitude displacement of the circuit board during placement and detection, improves the testing accuracy, and provides protection for the circuit board during the detection process, making it easier to remove the circuit board.
Smart Images
Figure CN223107889U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit board testing, in particular to a bed of needles for circuit board testing. Background Art
[0002] The bed of needles is also called an ICT test fixture, which is an on-line detection and test fixture. It is a non-standard test auxiliary fixture that uses electrical properties to test on-line components to check manufacturing defects and component defects. It is mainly used to check individual on-line components and the open circuit, short circuit, welding, etc. of each circuit network, and has the characteristics of simple operation, fast speed, and accurate fault location.
[0003] When the existing circuit board test bed of needles is in use, it is necessary to manually place the circuit board on the base of the bed of needles. When placing the circuit board, the staff place the circuit board on the base with both hands and withdraw their hands after placing it in a fixed position. Since there is a lack of corresponding components for restricting the circuit board on the base after placement, it may cause slight displacement of the circuit board when withdrawing hands after manually placing the circuit board. If such a situation occurs, it will affect the subsequent test. And during the test process, if there is a lack of corresponding restricting components, it may also cause the circuit board to have a small displacement. Even if the possibility of this situation occurring is small, there is still a certain possibility. Summary of the Utility Model
[0004] Aiming at the deficiencies of the prior art, the utility model provides a bed of needles for circuit board testing, which has the ability to restrict the circuit board, avoids small displacements during the placement of the circuit board and the detection process, and at the same time has a certain protection ability for the circuit board during the detection process, solving the problem that the existing circuit board test bed of needles lacks certain restricting means for the circuit board, and small displacements may occur when the staff place the circuit board and during the circuit board test.
[0005] To achieve the above object, the utility model provides the following technical scheme: A bed of needles for circuit board testing, including a base, a column is fixedly installed on the left side of the base, a driving motor is fixedly installed at the upper right end of the column, a telescopic rod is movably installed at the bottom of the driving motor, a pressing plate is fixedly installed at the bottom of the telescopic rod, limiting plates are fixedly installed at the left sides of the front and rear ends of the pressing plate, a probe is fixedly installed at the bottom of the pressing plate, a slot hole is opened inside the limiting plate, and limiting columns are fixedly installed at the front and rear ends of the left side of the top of the base;
[0006] A test chamber is opened at the top of the base, an installation slot is opened at the rear inner wall of the test chamber, a limiting component is arranged in the installation slot, the limiting component includes a limiting block, the limiting block is movably installed in the installation slot, and the front end of the limiting block extends into the test chamber.
[0007] Preferably, the pressing plate is perpendicular to the upper part of the test chamber, and the limiting plate is sleeved on the limiting column through a slot formed inside.
[0008] Preferably, a sliding block is fixedly installed at the top of the limiting block. The sliding block is located in the installation groove and extends out of the upper surface of the base. A first spring is fixedly installed at the rear end of the limiting block.
[0009] Preferably, a limiting card slot is formed in the inner wall at the front end of the test chamber. Top columns are movably installed at the four corner positions inside the test chamber. A second spring is fixedly installed at the bottom of the top column. A first rubber gasket is fixedly installed on the inner surface of the test chamber outside the top column.
[0010] Preferably, the height at which the limiting card slot is formed is the same as the height from the bottom of the limiting block to the bottom of the test chamber.
[0011] Preferably, a popping-up component is arranged inside the base. The popping-up component includes a spring plate. The bottom of the spring plate is movably installed at the central position inside the base. The bottom of the spring plate is inside the base, and the top extends into the test chamber.
[0012] Preferably, a rubber gasket is fixedly installed at the top of the spring plate. A third spring is fixedly installed at the bottom of the spring plate. A second rubber gasket is fixedly installed on the inner surface of the test chamber outside the spring plate.
[0013] Preferably, the height of the spring plate when popped up by the third spring exceeds the height of the limiting block.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0015] 1. For this kind of needle bed for circuit board testing, by installing devices such as a base, a pressing plate, a test chamber, a limiting card slot, a limiting component, a top column, a second spring, and a first rubber gasket, it has the ability to limit the circuit board, avoiding small displacements during the placement and detection of the circuit board, and at the same time having a certain protective ability for the circuit board during the detection process.
[0016] 2. For this kind of needle bed for circuit board testing, by installing devices such as a limiting block, a sliding block, a popping-up component, a spring plate, a rubber gasket, a third spring, and a second rubber gasket, the device is more convenient to use, facilitating the removal of the circuit board after testing from the test chamber, and further improving the protective ability for the circuit board. Description of the Drawings
[0017] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 Schematic diagram of the overall structure of the circuit board test bed of the present utility model;
[0019] Figure 2 Schematic diagram of the internal planar structure of the base of the present utility model;
[0020] Figure 3 Schematic diagram of the limiting component structure of the present utility model;
[0021] Figure 4 Schematic diagram of the overall structure of the ejector post of the present utility model;
[0022] Figure 5 Schematic diagram of the elastic component structure of the present utility model.
[0023] Explanation of the reference numerals:
[0024] 1. Base; 2. Column; 3. Driving motor; 4. Telescopic rod; 5. Pressure plate; 6. Limiting plate; 7. Slot hole; 8. Probe; 9. Limiting post; 10. Test chamber; 101. Limiting card slot; 102. Installation slot; 11. Limiting component; 111. Limiting block; 112. Sliding block; 113. First spring; 12. Ejector post; 13. Second spring; 14. First rubber washer; 15. Elastic component; 151. Elastic plate; 152. Rubber gasket; 153. Third spring; 154. Second rubber washer. Specific embodiments
[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.
[0026] Please refer to Figures 1 to 5 , the present utility model provides a technical solution:
[0027] A needle bed for circuit board testing, comprising a base 1, a column 2 is fixedly installed on the left side of the base 1, a driving motor 3 is fixedly installed at the upper right end of the column 2, a telescopic rod 4 is movably installed at the bottom of the driving motor 3, a pressing plate 5 is fixedly installed at the bottom of the telescopic rod 4, limiting plates 6 are fixedly installed on the left sides of the front and rear ends of the pressing plate 5, a probe 8 is fixedly installed at the bottom of the pressing plate 5, a slot hole 7 is opened inside the limiting plate 6, limiting columns 9 are fixedly installed on the front and rear ends of the left side of the top of the base 1, a testing chamber 10 is opened on the top of the base 1, an installation slot 102 is opened on the inner wall of the rear end of the testing chamber 10, a limiting component 11 is arranged inside the installation slot 102, the limiting component 11 includes a limiting block 111, the limiting block 111 is movably installed inside the installation slot 102, and the front end of the limiting block 111 extends into the testing chamber 10, the pressing plate 5 is perpendicular to the upper part of the testing chamber 10, and the limiting plate 6 is sleeved on the limiting column 9 through the slot hole 7 opened inside;
[0028] A sliding block 112 is fixedly installed on the top of the limiting block 111, the sliding block 112 is located inside the installation slot 102 and extends out of the upper surface of the base 1, a first spring 113 is fixedly installed at the rear end of the limiting block 111, a limiting card slot 101 is opened on the inner wall of the front end of the testing chamber 10, top columns 12 are movably installed at the four corner positions inside the testing chamber 10, a second spring 13 is fixedly installed at the bottom of the top column 12, a first rubber washer 14 is fixedly installed on the inner surface of the testing chamber 10 outside the top column 12, and the height at which the limiting card slot 101 is opened is the same as the height from the bottom of the limiting block 111 to the bottom of the testing chamber 10.
[0029] By adopting the above technical solution, during use, the pressing plate 5 is lifted by the driving motor 3 and the telescopic rod 4. When the pressing plate 5 moves up and down, it is assisted by the limiting plates 6 at the front and rear ends, the slot holes 7, and the limiting columns 9 installed above the base 1, so as to ensure that the pressing plate 5 always maintains a vertical lifting state with the test chamber 10, so as to prevent the position of the pressing plate 5 from deviating. After the pressing plate 5 is lifted, the circuit board to be tested is placed in the test chamber 10. When placing the circuit board, first insert one end of the circuit board into the limiting slot 101 opened at the front end of the test chamber 10, and then place the other end of the circuit board into the test chamber 10. When the other end of the circuit board is placed, it will first contact the limiting block 111. At this time, just press it slightly downward, and the limiting block 111 will be forced to retract into the installation slot 102, and the circuit board can be placed in the test chamber 10. After placement, the limiting block 111 is reset by the first spring 113. At this time, both ends of the circuit board are restricted in the test chamber 10 by the limiting slot 101 and the limiting block 111. Therefore, it is more convenient for the staff to place the circuit board without worrying about the displacement of the circuit board when both hands are withdrawn. Four corner positions inside the test chamber 10 are all installed with top columns 12. A second spring 13 is installed at the bottom of the top column 12. When the circuit board is placed in the test chamber 10, the top column 12 will move downward under force, but the top column 12 will still push the circuit board upward under the influence of the second spring 13, improving the firmness of the circuit board restricted in the test chamber 10. The circuit board is in a vertical state when moving up and down inside the test chamber 10, so that the up and down movement of the circuit board in the test chamber 10 will not cause a positional deviation. A first rubber washer 14 is arranged on the outer side of the top column 12. When the top column 12 descends, the first rubber washer 14 plays a cushioning role. Therefore, the circuit board can be protected to a certain extent, so that when the circuit board test is pressed down by the pressing plate 5 and the probe 8, it has a certain buffering effect.
[0030] Specifically, as Figures 2 to 5 shown, a popping component 15 is arranged inside the base 1. The popping component 15 includes a spring plate 151. The bottom of the spring plate 151 is movably installed at the central position inside the base 1. The bottom of the spring plate 151 is located inside the base 1, and the top extends into the test chamber 10. A rubber gasket 152 is fixedly installed at the top of the spring plate 151. A third spring 153 is fixedly installed at the bottom of the spring plate 151. A second rubber washer 154 is fixedly installed on the inner surface of the test chamber 10 outside the spring plate 151. The height of the spring plate 151 popped up by the third spring 153 exceeds the height of the limiting block 111.
[0031] By adopting the above technical solution, a pop-up component 15 is installed inside the test chamber 10. When the circuit board is placed inside the test chamber 10, the spring plate 151 will also be pressed downward. After the spring plate 151 is pressed downward, the third spring 153 is in a compressed state. The rubber gasket 152 installed on the surface of the spring plate 151 can play a certain protective role for the circuit board above. After the circuit board is placed in the test chamber 10, the spring plate 151 is always in a state of pushing the circuit board upward. During the circuit board test, the spring plate 151 will not affect it. When passing through, a second rubber washer 154 is also installed on the outside of the spring plate 151, which can play the same role as the ejector post 12, further improving the protection ability of the circuit board. When the circuit board test is completed, slide the slider 112 backward. During the movement of the slider 112, the limit block 111 is driven to retract into the installation groove 102. When the limit block 111 retracts into the installation groove 102 and no longer limits the circuit board, the pressure of the third spring 153 at the bottom of the spring plate 151 is released, pushing the spring plate 151 upward, so that the spring plate 151 pushes the circuit board upward. Since the height that the spring plate 151 is pushed up by the third spring 153 exceeds the height of the limit block 111, when the spring plate 151 pushes the circuit board upward, the slider 112 can be released. The limit block 111 is reset by the first spring 113 and will not limit the circuit board again. The design of the pop-up component 15 makes the device more convenient to use and facilitates the removal of the tested circuit board from the test chamber 10.
[0032] Working principle: During operation, first control the pressing plate 5 to rise through the driving motor 3 and the telescopic rod 4. During the rising process of the pressing plate 5, it is assisted by the limiting plate 6 and the limiting column 9 to ensure that the pressing plate 5 is always directly above the test chamber 10. After the pressing plate 5 rises, place the circuit board into the test chamber 10. When placing the circuit board, first snap the front end of the circuit board into the limiting card slot 101, and then place the rear end of the circuit board into the test chamber 10 and press it downward to make the limit block 111 catch the circuit board to limit the circuit board. At this time, control the pressing plate 5 to descend through the driving motor 3 and the telescopic rod 4 to test the circuit board through the probe 8 and other test components. After the test is completed, slide the slider 112 backward to make the limit block 111 retract into the installation groove 102, and the circuit board is ejected by the spring plate 151, and then the tested circuit board can be taken out.
[0033] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A bed of needles for circuit board testing, comprising a base, characterized in that: A column is fixedly installed on the left side of the base. A driving motor is fixedly installed at the upper right end of the column. A telescopic rod is movably installed at the bottom of the driving motor. A pressing plate is fixedly installed at the bottom of the telescopic rod. Limiting plates are fixedly installed on the left sides of the front and rear ends of the pressing plate. A probe is fixedly installed at the bottom of the pressing plate. A slot is opened inside the limiting plate. Limiting columns are fixedly installed on the front and rear ends of the left side of the top of the base; A test chamber is opened on the top of the base. An installation slot is opened on the inner wall at the rear end of the test chamber. A limiting component is arranged in the installation slot. The limiting component includes a limiting block. The limiting block is movably installed in the installation slot, and the front end of the limiting block extends into the test chamber.
2. The bed-of-nails for circuit board testing according to claim 1, wherein: The pressing plate is perpendicular to the upper part of the test chamber. The limiting plate is sleeved on the limiting column through the slot opened inside.
3. The bed of needles for circuit board testing according to claim 1, characterized in that: A sliding block is fixedly installed on the top of the limiting block. The sliding block is located in the installation slot and extends out of the upper surface of the base. A first spring is fixedly installed at the rear end of the limiting block.
4. A bed-of-nails for circuit board testing according to claim 1, characterized in that: A limiting card slot is opened on the inner wall at the front end of the test chamber. Top columns are movably installed at the four corner positions inside the test chamber. A second spring is fixedly installed at the bottom of the top column. A first rubber gasket is fixedly installed on the inner surface of the test chamber outside the top column.
5. A bed-of-nails for circuit board testing according to claim 4, characterized in that: The height at which the limiting card slot is opened is the same as the height from the bottom of the limiting block to the bottom of the test chamber.
6. A bed of needles for circuit board testing according to claim 1, wherein: A popping-up component is arranged inside the base. The popping-up component includes a popping-up plate. The bottom of the popping-up plate is movably installed at the central position inside the base. The bottom of the popping-up plate is inside the base, and the top extends into the test chamber.
7. A bed-of-nails for circuit board testing according to claim 6, characterized in that: A rubber gasket is fixedly installed on the top of the popping-up plate. A third spring is fixedly installed at the bottom of the popping-up plate. A second rubber gasket is fixedly installed on the inner surface of the test chamber outside the popping-up plate.
8. The bed of needles for circuit board testing according to claim 6, characterized in that: When the popping-up plate pops up due to the third spring, its height exceeds the height of the limiting block.