A negative pressure detection device
Patent Information
- Application Number
- CN202521135709.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-06-05
AI Technical Summary
[0002]在电子电路产品的量产测试领域，亟需一套具备高通用性、功能完善且可靠性强的自动化集成测试系统，以满足多样化产品的高效检测需求，当前市场上的测试设备面临以下技术挑战：电子电路产品在不同工作状态下需实时监测电压、电流等关键参数，传统人工测量方式存在效率低、误差大等问题，难以满足批量生产中的快速精准检测要求，因此，需集成高精度数控测试仪表（如电压表、电流表），实现参数的实时采集与动态分析，并通过数据通讯接口与主控单元联动，确保测试结果的准确性与一致性；
该负压检测装置，通过设置的测试机构，当需要对组装完成的印刷电路板进行负压测试工作，且印刷电路板处于放置槽内放置完成时，压钳、压板配合第一导柱与弹性按杆，可确保压板平稳下压，即可对印刷电路板进行固定，同时使上探针与印刷电路板顶部的连接点紧密接触，避免因接触不良导致的测试误差，同时时连接头底部与印刷电路板上咪头密闭连接，固定且连接完成后，控制主板启动电磁阀控制负压发生器工作，通过吸管、连接头连接到印刷电路板上的咪头，使咪头产生负压，模拟抽气过程，检测印刷电路板上在抽气过程工作状态下的电压值、电流值，通过电流表、电压表反馈检测值，高效完成印刷电路板的电气性能检测，并且放置组件和压紧组件分别设置有两组，可以同时对两个印刷电路板进行测试，相较于传统单次测试模式，测试效率直接翻倍，高精度数控测试仪表（电流表、电压表）实时监测测试过程中的电流、电压数据，精准反馈 印刷电路板的电气性能，负压组件的稳定运行，能够精确模拟不同吸气力度下印刷电路板的工作状态，使得测试数据更贴近实际使用场景，从而保障测试结果的高精度与可靠性。
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Figure CN224651485U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of negative pressure testing technology, specifically a negative pressure detection device. Background Technology
[0002] In the field of mass production testing of electronic circuit products, there is an urgent need for an automated integrated testing system with high versatility, complete functions, and strong reliability to meet the high-efficiency testing needs of diverse products. The testing equipment on the market currently faces the following technical challenges: Electronic circuit products need to monitor key parameters such as voltage and current in real time under different working conditions. Traditional manual measurement methods have problems such as low efficiency and large errors, which make it difficult to meet the requirements of rapid and accurate testing in mass production. Therefore, it is necessary to integrate high-precision CNC testing instruments (such as voltmeters and ammeters) to realize real-time acquisition and dynamic analysis of parameters, and link with the main control unit through a data communication interface to ensure the accuracy and consistency of test results. Electronic circuit products involve multiple operating modes in practical applications (such as charging and discharging, load switching, etc.), and need to simulate different power input conditions and external trigger signals (such as negative pressure environment) to verify functional reliability. Traditional test equipment usually uses fixed power input and cannot dynamically adjust the voltage output (such as continuous adjustment in the range of 3.1V to 3.7V), and lacks the ability to automatically control external trigger scenarios (such as simulating air intake action), resulting in limited test coverage. In mass production, the serial testing mode of a single test channel is time-consuming and difficult to match the production capacity requirements of the production line. Therefore, it is necessary to design a negative pressure detection device to solve the above problems. Utility Model Content
[0003] The purpose of this invention is to provide a negative pressure detection device to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a negative pressure detection device, comprising a housing, a placement mechanism on the top of the housing, a testing mechanism on the top of the placement mechanism, a fixing frame on the top left side of the placement mechanism, an ammeter fixedly connected inside the fixing frame, a voltmeter fixedly connected inside the fixing frame, a printed circuit board on the inner side of the placement mechanism, and a control main board fixedly connected inside the housing. The testing mechanism includes a clamping component and a negative pressure component. The clamping component is disposed on the top of the placement mechanism, and the negative pressure component is disposed inside the clamping component. The clamping assembly includes a mounting bracket disposed on the top of the placement mechanism. A clamping clamp is fixedly connected to the front side of the mounting bracket, and a fixing plate is fixedly connected to the front side of the mounting bracket. A pressure plate is fixedly connected to the bottom of the clamping clamp. A first bearing is fixedly connected inside the pressure plate. A first guide post is slidably connected inside the first bearing. An elastic push rod is fixedly connected inside the pressure plate. An upper probe is fixedly connected inside the pressure plate and disposed on the top of the printed circuit board.
[0005] Preferably, the top of the first guide post is fixedly connected to the bottom of the fixing plate, the bottom of the first guide post is disposed on the top of the placement mechanism, the ammeter and voltmeter are electrically connected to the control main board respectively, and the bottom of the upper probe is in contact with the top of the printed circuit board, so as to facilitate connection between the upper probe and the printed circuit board through the connection point of the printed circuit board.
[0006] Preferably, the negative pressure assembly includes a negative pressure generator, which is fixedly connected to the bottom of the housing. A straw is fixedly connected to the rear side of the negative pressure generator, and a connector is fixedly connected to the top and bottom of the straw. The connector is fixedly connected to the inside of the pressure plate. A solenoid valve is fixedly connected to the front side of the negative pressure generator, and the solenoid valve is fixedly connected to the bottom of the housing.
[0007] Preferably, the straw is slidably connected inside the mounting frame, and the straw is disposed inside the placement mechanism to facilitate the delivery of gas through the straw.
[0008] Preferably, the placement mechanism includes a mounting plate, which is fixedly connected to the top of the housing. A second bearing is fixedly connected inside the mounting plate, and a second guide post is slidably connected inside the second bearing. A placement plate is fixedly connected to the top of the second guide post. A placement groove is formed inside the placement plate. A spring post is fixedly connected inside the mounting plate, and the top of the spring post is fixedly connected to the bottom of the placement plate. A lower probe is fixedly connected inside the mounting plate, and the lower probe is disposed at the bottom of the printed circuit board. The top of the lower probe is fixedly connected to the placement plate. A start button and a stop button are fixedly connected inside the mounting plate. A first indicator light and a second indicator light are fixedly connected inside the mounting plate.
[0009] Preferably, the start button, stop button, first indicator light, and second indicator light are electrically connected to the control motherboard, the top of the lower probe is in contact with the bottom of the printed circuit board, and the inner side of the placement slot is in contact with the outer side of the printed circuit board, so as to facilitate the observation of the test results through the first indicator light and the second indicator light.
[0010] Preferably, the top of the mounting plate is fixedly connected to the fixing frame, the first guide post and the bottom of the mounting frame respectively. The mounting plate has a groove inside that has the same movement trajectory as the straw. The straw is slidably connected in the groove, which facilitates the movement of the straw through the groove.
[0011] Compared with the prior art, the present invention provides a negative pressure detection device, which has the following beneficial effects: This negative pressure detection device, through its designed testing mechanism, allows for the negative pressure testing of assembled printed circuit boards (PCBs) within a placement slot. The clamps and pressure plate, along with the first guide post and elastic lever, ensure a smooth downward pressure, thus securing the PCB. Simultaneously, the upper probe makes tight contact with the connection point on the top of the PCB, preventing testing errors due to poor contact. The bottom of the connector also ensures a tight seal with the microphone on the PCB. Once secured and connected, the mainboard activates a solenoid valve to control the negative pressure generator. This generator, connected to the microphone on the PCB via a suction tube and connector, generates negative pressure, simulating a vacuuming process to test the PCB. The voltage and current values on the circuit board during the suction process are fed back by ammeters and voltmeters, efficiently completing the electrical performance testing of the printed circuit board. Two sets of placement and clamping components are provided, allowing simultaneous testing of two printed circuit boards. Compared to the traditional single-test mode, testing efficiency is doubled. High-precision CNC testing instruments (ammeters and voltmeters) monitor the current and voltage data in real time during the test, accurately reflecting the electrical performance of the printed circuit board. The stable operation of the negative pressure component can accurately simulate the working state of the printed circuit board under different suction forces, making the test data closer to actual usage scenarios, thus ensuring high accuracy and reliability of the test results.
[0012] This negative pressure detection device, through its placement mechanism, first places the assembled printed circuit board (PCB) in the placement slot when testing is required, ensuring that the connection point at the bottom of the PCB contacts the top of the lower probe. The combination of the mounting plate, second guide post, spring post, and placement plate provides the placement plate with a certain degree of elasticity and cushioning, facilitating easy placement and removal of the PCB by the user. The placement slot accurately positions the PCB, reducing manual calibration steps. The start button, stop button, first indicator light, and second indicator light are connected to the control motherboard, forming an intuitive operation feedback system. Users can clearly understand the test status and results, simplifying the operation process, reducing operational difficulty, and improving testing efficiency. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the testing mechanism; Figure 3 This is a schematic diagram of the clamping component structure; Figure 4 This is a schematic diagram of the bottom structure of the clamps; Figure 5 This is a schematic diagram of the negative pressure component structure; Figure 6 This is a schematic diagram of the placement mechanism; Figure 7 This is a schematic diagram of the main control management circuit unit structure for testing.
[0014] In the diagram: 1. Outer casing; 2. Testing mechanism; 3. Placement mechanism; 4. Printed circuit board; 5. Fixing bracket; 6. Ammeter; 7. Voltmeter; 8. Control main board; 21. Clamping assembly; 22. Negative pressure assembly; 211. Mounting bracket; 212. Clamping clamp; 213. Pressure plate; 214. First bearing; 215. First guide post; 216. Elastic push rod; 217. Upper probe; 218. Fixing plate; 221. Negative pressure generator; 222. Suction tube; 223. Connector; 224. Solenoid valve; 31. Mounting plate; 32. Placement plate; 33. Second bearing; 34. Second guide post; 35. Spring post; 36. Lower probe; 37. Start button; 38. Stop button; 39. First indicator light; 391. Second indicator light; 392. Placement slot. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0017] This utility model provides the following technical solution: Example 1
[0018] Please see Figures 1-7 This utility model provides a technical solution: a negative pressure detection device, including a shell 1, a placement mechanism 3 is provided on the top of the shell 1, a testing mechanism 2 is provided on the top of the placement mechanism 3, a fixing frame 5 is provided on the left side of the top of the placement mechanism 3, an ammeter 6 is fixedly connected inside the fixing frame 5, a voltmeter 7 is fixedly connected inside the fixing frame 5, a printed circuit board 4 is provided on the inside of the placement mechanism 3, and a control main board 8 is fixedly connected inside the shell 1. The testing mechanism 2 includes a clamping component 21 and a negative pressure component 22. The clamping component 21 is disposed on the top of the placement mechanism 3, and the negative pressure component 22 is disposed inside the clamping component 21. The clamping assembly 21 includes a mounting bracket 211, which is located on the top of the placement mechanism 3. A clamping clamp 212 is fixedly connected to the front side of the mounting bracket 211, and a fixing plate 218 is fixedly connected to the front side of the mounting bracket 211. A pressure plate 213 is fixedly connected to the bottom of the clamping clamp 212. A first bearing 214 is fixedly connected inside the pressure plate 213. A first guide post 215 is slidably connected inside the first bearing 214. An elastic push rod 216 is fixedly connected inside the pressure plate 213. An upper probe 217 is fixedly connected inside the pressure plate 213 and is located on the top of the printed circuit board 4.
[0019] The top of the first guide post 215 is fixedly connected to the bottom of the fixing plate 218. The bottom of the first guide post 215 is set on the top of the placement mechanism 3. The ammeter 6 and the voltmeter 7 are electrically connected to the control main board 8 respectively. The bottom of the upper probe 217 is in contact with the top of the printed circuit board 4, which facilitates connection between the upper probe 217 and the connection point of the printed circuit board 4.
[0020] Please see Figures 1-7The present invention provides a technical solution: the negative pressure component 22 includes a negative pressure generator 221, which is fixedly connected to the bottom of the outer shell 1. A straw 222 is fixedly connected to the rear side of the negative pressure generator 221. A connector 223 is fixedly connected to the top and bottom of the straw 222. The connector 223 is fixedly connected to the inside of the pressure plate 213. A solenoid valve 224 is fixedly connected to the front side of the negative pressure generator 221. The solenoid valve 224 is fixedly connected to the bottom of the outer shell 1.
[0021] The straw 222 is slidably connected inside the mounting bracket 211, and the straw 222 is located inside the placement mechanism 3, which facilitates the delivery of gas through the straw 222. Example 2
[0022] Please see Figures 1-7 Furthermore, based on Embodiment 1, the placement mechanism 3 further includes a mounting plate 31, which is fixedly connected to the top of the outer casing 1. A second bearing 33 is fixedly connected inside the mounting plate 31, and a second guide post 34 is slidably connected inside the second bearing 33. A placement plate 32 is fixedly connected to the top of the second guide post 34. A placement groove 392 is opened inside the placement plate 32. A spring post 35 is fixedly connected inside the mounting plate 31, and the top of the spring post 35 is fixedly connected to the bottom of the placement plate 32. A lower probe 36 is fixedly connected inside the mounting plate 31, and the lower probe 36 is disposed at the bottom of the printed circuit board 4. The top of the lower probe 36 is fixedly connected to the placement plate 32. A start button 37 and a stop button 38 are fixedly connected inside the mounting plate 31. A first indicator light 39 and a second indicator light 391 are fixedly connected inside the mounting plate 31.
[0023] The start button 37, stop button 38, first indicator light 39 and second indicator light 391 are electrically connected to the control main board 8. The top of the lower probe 36 is in contact with the bottom of the printed circuit board 4, and the inner side of the placement slot 392 is in contact with the outer side of the printed circuit board 4, so as to facilitate the observation of the test results through the first indicator light 39 and the second indicator light 391.
[0024] The top of the mounting plate 31 is fixedly connected to the fixing frame 5, the first guide post 215 and the bottom of the mounting frame 211 respectively. The mounting plate 31 has a groove with the same movement trajectory as the straw 222. The straw 222 is slidably connected in the groove, which facilitates the movement of the straw 222 through the groove.
[0025] In actual operation, when this device is used, when it is necessary to perform negative pressure testing on the assembled printed circuit board 4, the printed circuit board 4 is first placed in the placement slot 392 of the fixing plate 218, and the connection point at the bottom of the printed circuit board 4 is made to contact the top of the lower probe 36. The lower probe 36 is fixed to the placement plate 32 and contacts the connection point on the lower surface of the assembled printed circuit board 4 to establish an electrical path. The combination of the mounting plate 31, the second guide post 34, the spring post 35 and the placement plate 32 gives the placement plate 32 a certain elasticity and buffer, making it easy for users to place and remove the printed circuit board 4. The placement slot 392 can accurately position the circuit board and reduce manual calibration steps. The operator moves the pressing component down using the clamp 212. The clamp 212, the pressure plate 213, the first guide post 215, and the elastic push rod 216 ensure that the pressure plate 213 presses down smoothly, thus fixing the printed circuit board 4. At the same time, the upper probe 217 makes tight contact with the connection point on the top of the printed circuit board 4 to avoid test errors caused by poor contact. Meanwhile, the bottom of the connector 223 is sealed to the microphone on the printed circuit board 4. The various current and voltage measurement points of the assembled printed circuit board 4 are connected to the ammeter 6 and the voltmeter 7. After the connection is fixed, the control motherboard 8 starts the solenoid valve 224 to control the negative pressure generator 221 to work. It is connected to the microphone on the printed circuit board 4 through the suction tube 222 and the connector 223, so that the microphone generates negative pressure to simulate the air pumping process. The voltage and current values on the printed circuit board 4 are detected during the air pumping process. The detection values are fed back through the ammeter 6 and voltmeter 7, which efficiently completes the electrical performance test of the printed circuit board 4. The voltage and current data of the test device under simulated working conditions are collected by the instrument in real time. The main control chip synchronously detects whether the indicator light operation rules of the test device conform to the preset logic. The test results are comprehensively judged and displayed through the external first indicator light 39 and second indicator light 391. Furthermore, there are two sets of placement and clamping components 21, which can test two printed circuit boards 4 simultaneously. Compared with the traditional single test mode, the test efficiency is directly doubled. High-precision CNC test instruments (ammeter 6, voltmeter 7) monitor the current and voltage data in real time during the test process, accurately reflecting the electrical performance of the printed circuit board 4. The stable operation of the negative pressure component 22 can accurately simulate the working state of the printed circuit board 4 under different suction forces, making the test data closer to the actual use scenario, thereby ensuring the high accuracy and reliability of the test results. The main control chip analyzes data such as voltage, current, and LED status in real time. If all parameters meet the standard, the first indicator light 39 is lit. If there is an abnormality, the second indicator light 391 is lit, and the fault type can be recorded by software. When the test is completed, the operator can release the clamp 212, take out the test piece, and complete the single test process. In this case, the first indicator light 39 represents (OK), and the second indicator light 391 represents (NG). The test main control management circuit unit uses the STM32F103VET6 high-performance chip as the MCU main chip and internally writes system test software. It is the core part of the test system developed in this project. The key functions such as adjusting the measurement accuracy of ammeter 6 and voltmeter 7, switching the measurement points of ammeter 6 and voltmeter 7, switching the assembled printed circuit board 4 test module, controlling and switching the power input voltage of printed circuit board 4, simulating the discharge and charge-discharge protection of printed circuit board 4 under various conditions, detecting whether the indicator lights of printed circuit board 4 are lit normally under various working states, and judging and indicating the test results through indicator lights are all uniformly coordinated and controlled by the test main control unit. The input power of the multi-channel adjustable power supply unit is DC 24V, and the output terminal has DC 3.3V to power the MCU. DC 3.1V, DC 3.2V--DC 3.7V, and DC 4.22V are used to test the charging and discharging, charging and discharging protection functions of the printed circuit board 4, respectively. The output terminal of the power supply can be dynamically adjusted according to the test requirements by the MCU embedded software in the test main control management circuit unit.
[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A negative pressure detection device, comprising a housing (1), characterized in that: The top of the outer casing (1) is provided with a placement mechanism (3), the top of the placement mechanism (3) is provided with a testing mechanism (2), the left side of the top of the placement mechanism (3) is provided with a fixing frame (5), the inside of the fixing frame (5) is fixedly connected with an ammeter (6), the inside of the fixing frame (5) is fixedly connected with a voltmeter (7), the inside of the placement mechanism (3) is provided with a printed circuit board (4), and the inside of the outer casing (1) is fixedly connected with a control motherboard (8). The testing mechanism (2) includes a clamping component (21) and a negative pressure component (22). The clamping component (21) is located on the top of the placement mechanism (3), and the negative pressure component (22) is located inside the clamping component (21). The clamping assembly (21) includes a mounting bracket (211), which is located on the top of the placement mechanism (3). A clamp (212) is fixedly connected to the front side of the mounting bracket (211), and a fixing plate (218) is fixedly connected to the front side of the mounting bracket (211). A pressure plate (213) is fixedly connected to the bottom of the clamp (212). A first bearing (214) is fixedly connected inside the pressure plate (213). A first guide post (215) is slidably connected inside the first bearing (214). An elastic push rod (216) is fixedly connected inside the pressure plate (213). An upper probe (217) is fixedly connected inside the pressure plate (213). The upper probe (217) is located on the top of the printed circuit board (4).
2. The negative pressure detection device according to claim 1, characterized in that: The top of the first guide post (215) is fixedly connected to the bottom of the fixing plate (218), the bottom of the first guide post (215) is set on the top of the placement mechanism (3), the ammeter (6) and the voltmeter (7) are electrically connected to the control main board (8) respectively, and the bottom of the upper probe (217) is in contact with the top of the printed circuit board (4).
3. The negative pressure detection device according to claim 1, characterized in that: The negative pressure assembly (22) includes a negative pressure generator (221), which is fixedly connected to the bottom of the outer shell (1). A straw (222) is fixedly connected to the rear side of the negative pressure generator (221). A connector (223) is fixedly connected to the top and bottom of the straw (222). The connector (223) is fixedly connected to the inside of the pressure plate (213). A solenoid valve (224) is fixedly connected to the front side of the negative pressure generator (221). The solenoid valve (224) is fixedly connected to the bottom of the outer shell (1).
4. The negative pressure detection device according to claim 3, characterized in that: The straw (222) is slidably connected inside the mounting bracket (211), and the straw (222) is disposed inside the placement mechanism (3).
5. The negative pressure detection device according to claim 1, characterized in that: The placement mechanism (3) includes a mounting plate (31), which is fixedly connected to the top of the outer shell (1). A second bearing (33) is fixedly connected inside the mounting plate (31). A second guide post (34) is slidably connected inside the second bearing (33). A placement plate (32) is fixedly connected to the top of the second guide post (34). A placement groove (392) is provided inside the placement plate (32). A spring post (35) is fixedly connected inside the mounting plate (31). The top of the spring post (35) is fixedly connected to the placement plate (392). 32) At the bottom, a lower probe (36) is fixedly connected inside the mounting plate (31). The lower probe (36) is located at the bottom of the printed circuit board (4). The top of the lower probe (36) is fixedly connected inside the placement plate (32). A start button (37) is fixedly connected inside the mounting plate (31). A stop button (38) is fixedly connected inside the mounting plate (31). A first indicator light (39) is fixedly connected inside the mounting plate (31). A second indicator light (391) is fixedly connected inside the mounting plate (31).
6. The negative pressure detection device according to claim 5, characterized in that: The start button (37), stop button (38), first indicator light (39) and second indicator light (391) are electrically connected to the control motherboard (8), the top of the lower probe (36) is in contact with the bottom of the printed circuit board (4), and the inner side of the placement slot (392) is in contact with the outer side of the printed circuit board (4).
7. A negative pressure detection device according to claim 5, characterized in that: The top of the mounting plate (31) is fixedly connected to the bottom of the fixing frame (5), the first guide post (215) and the mounting frame (211). The mounting plate (31) has a groove with the same movement trajectory as the straw (222) inside, and the straw (222) is slidably connected in the groove.