Device for detecting contact performance of elastic sheet in connector
By designing a detection device including a PCB board, detection circuit and gold finger unit, and using LED indicators to display the shrapnel contact status, the complex problem of shrapnel contact performance evaluation within the connector is solved, and rapid and concise detection and accuracy improvement are achieved.
Patent Information
- Application Number
- CN202421938102.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the prior art, the contact performance evaluation of the shrapnel inside the connector is too complex and difficult, and it is difficult to accurately judge its status during the production, testing and maintenance stages.
A detection device is designed, including a PCB board, a detection circuit, an external power supply and a gold finger unit. The shrapnel contact status is directly displayed through the LED indicator light, and the shrapnel contact status is judged by the voltage comparator and the resistor network, which simulates the actual use scenario for quick and concise detection.
It improves the accuracy and operational convenience of the detection results, reduces human judgment, can quickly and concisely judge the shrapnel contact performance, and reduces production costs and fault tracking difficulty.
Smart Images
Figure CN223166905U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic design and manufacturing, in particular to a device for detecting the contact performance of internal elastic pieces of a connector. Background Technique
[0002] In the process of manufacturing and maintaining electronic devices, as a key component for signal and power transmission, the contact quality of the internal elastic pieces of an electronic connector is directly related to the stability and reliability of the entire system. The internal elastic pieces of an electronic connector are exquisitely designed to ensure a stable and reliable electrical connection between the plug and the socket. However, due to their small size and being hidden inside the connector, it becomes particularly complex and difficult to evaluate their contact performance during the production, testing, and subsequent maintenance stages. Content of the Utility Model
[0003] The purpose of the utility model is to provide a device for detecting the contact performance of internal elastic pieces of a connector, aiming to solve the technical problem that the evaluation of the contact performance of existing internal elastic pieces of a connector is too complex and difficult.
[0004] To solve the above technical problem, the purpose of the utility model is achieved through the following technical solutions:
[0005] The utility model provides a device for detecting the contact performance of internal elastic pieces of a connector, including a PCB board, a detection circuit, an external power supply, and a gold finger unit. The PCB board is convexly provided with a plug-in part, the gold finger unit is located inside the plug-in part, the plug-in part is connected to the connector, the detection circuit is located on the PCB board, the detection circuit is connected to the gold finger unit, the detection circuit is connected to the external power supply, the detection circuit includes an LED indicator light. When the plug-in part is inserted into the connector in a mating manner and the LED indicator light can be lit, it indicates that the contact function of the to-be-tested elastic piece inside the connector is normal.
[0006] Further, the detection circuit further includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a voltage comparator; the negative input terminal of the voltage comparator is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the external power supply, the positive input terminal of the voltage comparator is connected to one end of the first resistor, the other end of the first resistor is connected to the external power supply, one end of the first resistor is connected to one end of the second resistor, the other end of the second resistor and the negative power supply voltage input terminal of the voltage comparator are both grounded, the positive power supply voltage input terminal of the voltage comparator is connected to the external power supply, the voltage output terminal of the voltage comparator is connected to one end of the third resistor and one end of the fifth resistor, the other end of the third resistor is connected to the external power supply, the other end of the fifth resistor is connected to one end of the LED indicator light, and the other end of the LED indicator light is grounded.
[0007] Further, the positive electrode of the gold finger unit is connected to one end of the fourth resistor and the negative input terminal of the voltage comparator, and the negative electrode of the gold finger unit is grounded.
[0008] Further, a power input circuit is further provided in the connector. The power input circuit includes a sixth resistor. One end of the sixth resistor is connected to the power input terminal of the connector, the other end of the sixth resistor is connected to the external power supply, and the grounding terminal of the connector is grounded.
[0009] Further, the number of the plugging parts is two, and they are respectively arranged at both ends of the PCB board. The shapes of the gold finger units in the two plugging parts can be designed differently.
[0010] Further, the number of the gold finger units corresponds to the number of the to-be-tested elastic pieces. Each gold finger unit includes several gold fingers. The gold fingers are divided into positive gold fingers and negative gold fingers, and the positive gold fingers and the negative gold fingers are arranged alternately.
[0011] Further, each gold finger unit corresponds to one to-be-tested elastic piece, and each gold finger unit corresponds to one detection circuit.
[0012] Further, the positive gold fingers in the gold finger unit are connected in pairs, and the negative gold fingers in the gold fingers are connected in pairs.
[0013] Further, the arrangement mode of the gold fingers is divided into vertical arrangement and horizontal arrangement.
[0014] The beneficial effects of the present utility model compared with the prior art are as follows: The present utility model designs a circuit board that can be inserted into the object to be measured. The thickness is the same as the internal height of the connector, and the shape can be inserted into the object to be measured. The gold fingers are divided into multiple pieces arranged horizontally or vertically in the area equivalent to the area of the elastic piece. Each elastic piece corresponds to a voltage comparator. When the elastic piece makes contact, the negative potential of the comparator changes from high to low, causing the Vout output to be high and thus lighting up the LED. Compared with the traditional detection method, the present utility model can simulate the actual use scenario for judgment, directly indicate through the LED to quickly and simply obtain the result, and can also reduce human judgment, greatly improving the operation convenience. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings 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.
[0016] Figure 1 FIG. is a schematic structural diagram of a device for detecting the contact performance of internal elastic pieces of a connector provided by an embodiment of the present utility model;
[0017] Figure 2 FIG. is a schematic diagram of a detection circuit of a device for detecting the contact performance of internal elastic pieces of a connector provided by an embodiment of the present utility model;
[0018] Figure 3 FIG. is a general circuit diagram of a device for detecting the contact performance of internal elastic pieces of a connector provided by an embodiment of the present utility model;
[0019] Figure 4 FIG. is a circuit diagram of the power input of a connector provided by an embodiment of the present utility model.
[0020] REFERENCE NUMERALS:
[0021] 1, PCB board; 11, insertion part; 2, detection circuit; 3, external power supply; 4, gold finger unit; 41, positive gold finger; 42, negative gold finger; 5, power input circuit; 6, connector; 61, elastic piece to be measured; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; U1, voltage comparator; D1, LED indicator; R21, sixth resistor. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0023] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.
[0024] It should also be understood that the terms used in this specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.
[0025] It should be further understood that the term "and / or" used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0026] Please refer to Figures 1 to 4 , a device for detecting the contact performance of the internal spring pieces of a connector is disclosed in a specific embodiment of the present invention, which includes a PCB board 1, a detection circuit 2, an external power supply 3, and a gold finger unit 4. A plug-in portion 11 protrudes from the PCB board 1, the gold finger unit 4 is located within the plug-in portion 11, the plug-in portion 11 is connected to the connector 6, the detection circuit 2 is located on the PCB board 1, the detection circuit 2 is connected to the gold finger unit 4, the detection circuit 2 is connected to the external power supply 3, the detection circuit 2 includes an LED indicator D1. The plug-in portion 11 is inserted into the connector 6 in a mating manner, and if the LED indicator D1 can be lit, it indicates that the contact function of the to-be-tested spring piece 61 within the connector 6 is normal.
[0027] Specifically, the detection circuit 2 inside the detection device is used to detect the contact performance of the to-be-tested spring piece 61 inside the connector 6 after the connector 6 is inserted into the PCB board 1. The contact state of the to-be-tested spring piece 61 can be visually obtained through the LED indicator D1 to determine whether the contact of the to-be-tested spring piece 61 inside the connector 6 is good. In this way, not only can human judgment be reduced and operation convenience be improved, but also the actual use scenario can be simulated for judgment, increasing the accuracy of the detection result.
[0028] Such as Figures 2 - 3As shown, the detection circuit 2 further includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a voltage comparator U1; the negative input terminal of the voltage comparator U1 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to the external power supply 3, the positive input terminal of the voltage comparator U1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to the external power supply 3, one end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the second resistor R2 and the negative power supply voltage input terminal of the voltage comparator U1 are both grounded, the positive power supply voltage input terminal of the voltage comparator U1 is connected to the external power supply 3, the voltage output terminal of the voltage comparator U1 is connected to one end of the third resistor R3 and one end of the fifth resistor R5, the other end of the third resistor R3 is connected to the external power supply 3, the other end of the fifth resistor R5 is connected to one end of the LED indicator D1, and the other end of the LED indicator D1 is grounded.
[0029] Specifically, the voltage comparator U1 has two input terminals (positive input terminal and negative input terminal) and one output terminal. It compares the voltages of the two input terminals and controls the voltage state of the output terminal according to the comparison result, that is, which input terminal has a higher voltage, usually high level or low level. In this circuit, the positive power supply voltage input terminal of the voltage comparator U1 is connected to the positive pole of the external power supply 3, the negative power supply voltage input terminal is grounded, providing the power required for the comparator to work. The first resistor R1 and the second resistor R2 are connected in series and then grounded, forming a voltage division network for dividing the voltage of the external power supply 3 and sending it to the positive input terminal of the voltage comparator U1. The fifth resistor R5 and the LED indicator D1 are connected in series between the output terminal of the voltage comparator U1 and the ground. When the voltage comparator U1 outputs a high level, current flows through R5 to the LED indicator D1, causing it to emit light, indicating that the gold finger unit 4 has come into contact with an external object; when the voltage comparator U1 outputs a low level, the LED indicator D1 does not emit light, indicating that the gold finger unit 4 has not come into contact with an external object.
[0030] As Figure 2 shown, the positive pole of the gold finger unit 4 is connected to one end of the fourth resistor R4 and the negative input terminal of the voltage comparator U1, and the negative pole of the gold finger unit 4 is grounded.
[0031] Specifically, in the detection circuit 2, the gold finger unit 4 serves as a conductive bridge. When it comes into contact with the to-be-tested elastic piece 61, a conductive path is formed. The negative input terminal of the voltage comparator U1 is connected to the to-be-tested elastic piece 61 through the gold finger unit 4. When the gold finger unit 4 contacts the to-be-tested elastic piece 61, the negative potential of the voltage comparator U1 will be pulled down to be close to the potential of the to-be-tested elastic piece 61, that is, close to the ground potential. Therefore, if the to-be-tested elastic piece 61 has good contact, the negative terminal of the voltage comparator U1 is grounded, and the voltage output terminal outputs a high level, and the LED indicator D1 conducts and emits light; if the elastic piece of the object to be measured cannot be contacted, the potential of the negative terminal of the voltage comparator U1 will not change, and the voltage output terminal maintains a low level, and the LED indicator D1 does not emit light; if the elastic piece of the object to be measured is in a critical state, the voltage output by the voltage output terminal will change between high and low levels, and the LED indicator D1 will flash. And the tester can observe by gently shaking the test board. Since a comparator circuit is used, the input current is very small, and the circuit or the object to be measured will not be damaged during plugging or shaking.
[0032] As Figure 4 shown, a power input circuit 5 is further provided in the connector 6. The power input circuit 5 includes a sixth resistor R21. One end of the sixth resistor R21 is connected to the power input terminal of the connector 6, the other end of the sixth resistor R21 is connected to the external power supply 3, and the grounding terminal of the connector 6 is grounded.
[0033] Specifically, in this embodiment, the connector 6 is a USB connector 6. In other embodiments, the type of the connector 6 can be selected according to specific circumstances. In the USB connector 6, two data signal lines, together with VCC (power line) and GND (ground line), constitute the basic electrical connection of the USB interface. In the test of the contact performance of the elastic pieces inside the connector 6 interface, usually an external power supply 3 is used to measure the electrical characteristics between VCC and GND, rather than directly supplying power to the USB device. In this embodiment, in order to quickly verify the connectivity and function of the circuit, the resistance value of the sixth resistor R21 is 0Ω. The 0Ω resistor can exist as a very small resistor and hardly affects the current passing through. Secondly, since the test focuses on physical contact and electrical conductivity, rather than the functionality or power management of the internal circuit of the object to be measured, the object to be measured does not need to be powered on during the test.
[0034] As Figure 1 shown, the number of the plug-in parts 11 is two, and they are respectively arranged at both ends of the PCB board 1. The shapes of the gold finger units 4 in the two plug-in parts 11 can be designed differently.
[0035] Specifically, in this embodiment, the insertion portions 11 protrude outward from both side edges of the PCB board 1. The thickness of the PCB board 1 and the shape of the insertion portions 11 are both consistent with the internal height and shape of the slots of the connector 6, so as to ensure that the PCB board 1 can be smoothly docked when inserted and maintain a stable connection state after connection. In order to meet the tests of different types of connectors 6, the gold finger units 4 in the insertion portions 11 at both ends of the PCB board 1 are set to different shapes, which can realize the function of using one detection device to detect two different types of connectors 6, reduce the setting of detection devices for different types of connectors 6, and thus reduce the production cost.
[0036] As Figure 1 shown, the number of the gold finger units 4 corresponds to the number of the to-be-tested elastic pieces 61. Each gold finger unit 4 includes a plurality of gold fingers. The gold fingers are divided into positive gold fingers 41 and negative gold fingers 42, and the positive gold fingers 41 and the negative gold fingers 42 are arranged alternately.
[0037] Specifically, in this embodiment, both the number of the gold finger units 4 and the number of the to-be-tested elastic pieces 61 are four. In other embodiments, the number of the gold finger units 4 can be set according to the specific number of the to-be-tested elastic pieces 61. Since the number of the gold finger units 4 corresponds one-to-one to the number of the to-be-tested elastic pieces 61, it is ensured that each to-be-tested elastic piece 61 can be connected and tested by a corresponding gold finger unit 4. This one-to-one correspondence relationship avoids test errors caused by connection errors or omissions. And in electronic devices, the reasonable layout between the positive and negative poles is crucial for the stable transmission of signals. The alternating arrangement between the positive gold fingers 41 and the negative gold fingers 42 helps to reduce signal interference and ensure the accuracy and stability of the test signals.
[0038] As Figures 1 - 3 shown, each gold finger unit 4 corresponds to one to-be-tested elastic piece 61, and each gold finger unit 4 corresponds to one detection circuit 2.
[0039] Specifically, since each gold finger unit 4 corresponds to one detection circuit 2, when the test result shows an abnormality, the problem can be quickly located to the specific gold finger unit 4 and the to-be-tested elastic piece 61, greatly simplifying the process of fault tracking and location and improving the efficiency of maintenance and debugging. If more to-be-tested elastic pieces 61 need to be tested, only the corresponding number of gold finger units 4 and detection circuits 2 need to be added, without the need to perform large-scale transformation or upgrade on the entire test device. And each to-be-tested elastic piece 61 has an independent detection circuit 2 for processing, which means that the test process can be carried out in parallel without waiting for the previous to-be-tested elastic piece 61 to complete the test, greatly improving the test efficiency and shortening the test cycle.
[0040] As Figure 1As shown, the positive gold fingers 41 in the gold finger unit 4 are connected pairwise, and the negative gold fingers 42 in the gold fingers are connected pairwise.
[0041] Specifically, by internally connecting the positive gold fingers 41 and the negative gold fingers 42 pairwise respectively, the design complexity of the circuit can be greatly simplified. This design allows the use of fewer connecting wires or circuit components to achieve the same function, thereby reducing the manufacturing cost and failure rate; and this design can make the test signals be transmitted to all the test chips 61 to be measured more easily at the same time. This parallel test method can significantly shorten the test time and improve the test efficiency.
[0042] In this embodiment, the arrangement of the gold fingers is divided into vertical arrangement and horizontal arrangement. Specifically, setting the gold fingers in various arrangements is beneficial to adapting to the diversity of the test chips 61 to be measured.
[0043] As mentioned above, the above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art in the technical field disclosed by the present utility model can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present utility model, and these modifications or replacements should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims
1. A device for detecting the contact performance of the internal elastic sheet of a connector, characterized in that, It includes a PCB board, a detection circuit, an external power supply, and a gold finger unit. The PCB board is protruded with a plug-in part, the gold finger unit is located within the plug-in part, the plug-in part is connected to a connector, the detection circuit is located on the PCB board, the detection circuit is connected to the gold finger unit, the detection circuit is connected to the external power supply, the detection circuit includes an LED indicator light. When the plug-in part is inserted into the connector in a mating manner and the LED indicator light can be lit, it indicates that the contact function of the test spring piece within the connector is normal.
2. The device for detecting the contact performance of the internal elastic piece of the connector according to claim 1, characterized in that The detection circuit further includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a voltage comparator; The negative input terminal of the voltage comparator is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the external power supply, the positive input terminal of the voltage comparator is connected to one end of the first resistor, the other end of the first resistor is connected to the external power supply, one end of the first resistor is connected to one end of the second resistor, the other end of the second resistor and the negative power supply voltage input terminal of the voltage comparator are both grounded, the positive power supply voltage input terminal of the voltage comparator is connected to the external power supply, the voltage output terminal of the voltage comparator is connected to one end of the third resistor and one end of the fifth resistor, the other end of the third resistor is connected to the external power supply, the other end of the fifth resistor is connected to one end of the LED indicator light, and the other end of the LED indicator light is grounded.
3. The device for detecting the contact performance of the internal elastic sheet of the connector according to claim 2, characterized in that, The positive electrode of the gold finger unit is connected to one end of the fourth resistor and the negative input terminal of the voltage comparator, and the negative electrode of the gold finger unit is grounded.
4. The device for detecting the contact performance of the internal elastic piece of the connector according to claim 1, characterized in that A power input circuit is further provided within the connector. The power input circuit includes a sixth resistor. One end of the sixth resistor is connected to the power input terminal of the connector, the other end of the sixth resistor is connected to the external power supply, and the ground terminal of the connector is grounded.
5. The device for detecting the contact performance of the internal elastic sheet of a connector according to claim 1, wherein The number of the plug-in parts is two, and they are respectively arranged at both ends of the PCB board. The shapes of the gold finger units within the two plug-in parts can be designed differently.
6. The device for detecting the contact performance of the internal elastic sheet of a connector according to claim 1, characterized in that, The number of the gold finger units corresponds to the number of the test spring pieces. Each gold finger unit includes a plurality of gold fingers. The gold fingers are divided into positive gold fingers and negative gold fingers, and the positive gold fingers and the negative gold fingers are arranged alternately.
7. The device for detecting the contact performance of the internal elastic piece of the connector according to claim 6, wherein, Each gold finger unit corresponds to one test spring piece, and each gold finger unit corresponds to one detection circuit.
8. The device for detecting the contact performance of the internal elastic piece of the connector according to claim 6, characterized in that, The positive gold fingers within the gold finger unit are connected pairwise, and the negative gold fingers within the gold fingers are connected pairwise.
9. The device for detecting the contact performance of the internal elastic piece of the connector according to claim 6, wherein, The arrangement modes of the gold fingers are divided into vertical arrangement and horizontal arrangement.