Resistance test module
By designing the resistance test module, the automated testing of NTC thermistors is realized, which solves the problems of low efficiency and large errors in the existing technology, and improves the accuracy and consistency of the test.
Patent Information
- Application Number
- CN202422189900.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The testing method of NTC thermistor in the prior art is inefficient and prone to artificial errors, so it is impossible to achieve fast and accurate resistance testing.
A resistance testing module is designed, including parallel conveying tracks and defective tracks, equipped with clamping components, sensors, limiting components and cylinders. The PCB board is detected through sensors, the limiting components are fixed to the PCB board, and the cylinder control probe is in contact with the PCB board to realize automatic positioning and resistance testing.
It realizes the accuracy of automatic positioning of PCB boards and resistance testing, reduces manual operation errors, improves the reliability and consistency of tests, simplifies the operation process, and improves production efficiency.
Smart Images
Figure CN223113588U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of resistance testing, and in particular to a resistance testing module. Background Art
[0002] With the continuous progress of electronic technology, NTC thermistors are widely used in various electronic products for temperature measurement and temperature compensation. These NTC resistors are usually soldered on the PCB, and their performance directly affects the quality and stability of the final product. Therefore, during the production process, it is necessary to test the NTC resistors soldered on the PCB board to ensure good soldering effect, ensure that the resistance value is within the specified range, and ensure the normal operation of the electronic device.
[0003] Currently, the testing of NTC thermistors generally adopts manual or semi-automatic testing methods. Traditional testing methods include manually checking the resistance value or using testing instruments to measure each resistor. These methods usually require testing each PCB board one by one, with low operation efficiency and prone to human errors.
[0004] Therefore, the testing methods in the prior art have problems of complex operation and low testing efficiency. Due to the limitations of manual operation and equipment, the testing process may have problems of low efficiency and unstable results. This application aims to solve these problems through an automated testing mechanism, achieve fast and accurate resistance testing, and improve testing efficiency and consistency. Summary of the Utility Model
[0005] In order to be able to achieve fast and accurate resistance testing, improve testing efficiency and consistency, this application provides a resistance testing module. This application provides the following technical solutions:
[0006] A resistance testing module includes a conveying track and a defective product track arranged in parallel. Above the conveying track and the defective product track, there is a clamping component. On the conveying track, there are a sensor, a limiting component, and a first cylinder. The limiting component is used to stop the PCB board transported on the conveying track. Both the first cylinder and the sensor are located below the PCB board. The piston rod of the first cylinder is connected with a probe, and the probe is used to connect with a multimeter used in cooperation with the resistance testing module.
[0007] In a specific feasible implementation, a jacking cylinder is arranged below the PCB board on the conveying track. The jacking cylinder is located on one side of the first cylinder, and the piston rod of the jacking cylinder abuts against the bottom surface of the PCB board.
[0008] In a specific feasible implementation, the clamping assembly includes a gantry arranged above the conveying track and the defective product track. A first linear module is horizontally arranged on the gantry, a second linear module is vertically arranged on the first linear module, and a clamping jaw is arranged on the second linear module.
[0009] In a specific feasible implementation, a pressing plate is connected to one side of the clamping jaw.
[0010] In a specific feasible implementation, the limiting assembly includes a lifting cylinder and a mounting plate. The lifting cylinder is arranged on the conveying track, the piston rod of the lifting cylinder is connected to the mounting plate, and a limiting block is arranged on the mounting plate.
[0011] In a specific feasible implementation, there are two limiting blocks, and a gap for the clamping assembly to pass through is arranged between the two limiting blocks.
[0012] In a specific feasible implementation, there are two groups of limiting assemblies, and the two groups of limiting assemblies are arranged on both sides of the sensor on the conveying track.
[0013] In a specific feasible implementation, the sensor is one of a photoelectric sensor, a capacitive proximity sensor, or a laser sensor.
[0014] In summary, the beneficial effects of the present application at least include:
[0015] 1) Through the cooperation of the sensor, the limiting assembly, and the first cylinder, the automatic positioning and resistance testing of the PCB board are realized. The probe contacts the test points on the bottom surface of the PCB board through the precise control of the first cylinder, ensuring the accuracy and consistency of the resistance testing, reducing the error of manual operation, and improving the reliability of the testing.
[0016] 2) By setting the parallel conveying track and defective product track and the clamping assembly, the qualified and unqualified PCB boards can be automatically separated, avoiding the complexity of manual sorting. At the same time, the design of the jacking cylinder and the pressing plate enables the PCB board to be stably jacked up and pressed during the testing process, further ensuring the testing accuracy and simplifying the operation process.
[0017] 3) Through the cooperation of the gantry, the first and second linear modules, the clamping assembly can move flexibly in the vertical and horizontal directions to adapt to PCB boards of different sizes and specifications. This modular design enhances the flexibility and adaptability of the system, is applicable to various production environments, and improves the application range and economy of the equipment.
[0018] Through the cooperation of sensors, limit components and cylinders, the automatic stopping and positioning of PCB boards are achieved, avoiding the complexity and low efficiency of manual operations, thereby improving the automation level of testing. A probe is connected to the piston rod of the first cylinder, and the probe is connected to a multimeter. Through the precise control of the cylinder, the probe can accurately contact the test points on the bottom surface of the PCB board, ensuring the measurement accuracy of the resistance value, thereby improving the consistency and reliability of the test results. The settings of the conveying track and the defective product track enable the automatic separation of qualified and unqualified PCB boards. Through the operation of the clamping component, the unqualified PCB boards can be quickly transferred from the conveying track to the defective product track, avoiding confusion and repeated detection, thereby improving production efficiency.
[0019] The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present application and the accompanying drawings. Brief Description of the Drawings
[0020] Figure 1 is a schematic diagram of the overall structure of the resistance test module in this embodiment.
[0021] Figure 2 is Figure 1 an enlarged view of part A in
[0022] Reference numerals: 1, conveying track; 2, defective product track; 3, PCB board; 4, limit component; 41, lifting cylinder; 42, bottom plate; 43, limit block; 5, clamping component; 51, gantry; 52, first linear module; 53, second linear module; 54, clamping jaw; 55, pressing plate; 6, first cylinder; 7, probe; 8, jacking cylinder; 9, sensor. Detailed Description of the Preferred Embodiment
[0023] The following further describes in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.
[0024] To make the above objects, features and advantages of the present application more obvious and understandable, the following describes in detail the specific embodiments of the present application in conjunction with the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. In addition, it should be noted that for the sake of description, only parts related to the present application are shown in the drawings, not all structures. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.
[0025] The term "comprising" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.
[0026] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0027] An embodiment of this application discloses a resistance test module.
[0028] Referring to Figure 1 , the resistance test module includes a conveying track 1 and a defective product track 2 arranged in parallel. Above the conveying track 1 and the defective product track 2, there is a clamping assembly 5. In combination with Figure 2 , on the conveying track 1, there is a sensor 9 for detecting whether a PCB board 3 passes by. The sensor 9 is one of a photoelectric sensor, a capacitive proximity sensor, or a laser sensor.
[0029] Referring to Figure 1 and Figure 2 , the clamping assembly 5 includes a gantry 51 fixedly installed above the conveying track 1 and the defective product track 2. At the top of the gantry 51, there is a horizontally arranged first linear module 52. On the first linear module 52, there is a vertically arranged second linear module 53. At the bottom of the second linear module 53, there is a clamping jaw 54.
[0030] Referring to Figure 1 and Figure 2 , on both sides of the sensor 9 on the conveying track 1, there are limiting assemblies 4. In this application, the structures of the two groups of limiting assemblies 4 are exactly the same. Next, taking one of the limiting assemblies 4 as an example, its structure will be described in detail. The limiting assembly 4 includes a lifting cylinder 41 and a mounting plate. The lifting cylinder 41 is installed on the conveying track 1. The piston rod of the lifting cylinder 41 is fixedly connected to the bottom surface of the mounting plate. On the top surface of the mounting plate, two limiting blocks 43 are fixedly installed. There is a gap between the two limiting blocks 43 for the clamping jaw 54 to pass through. In implementation, when the PCB board 3 passes by the sensor 9, the first group of limiting assemblies 4 controls the lifting cylinder 41 to raise the limiting blocks 43 to stop the PCB board 3. Subsequently, the other group of limiting assemblies 4 also controls the lifting cylinder 41 to raise the limiting blocks 43 to limit the other side of the PCB board 3.
[0031] Referring to Figure 1 and Figure 2 , a lifting cylinder 8 is fixedly installed below the PCB board 3 on the conveying track 1. After the PCB board 3 is stopped by the limiting component 4, the piston rod of the lifting cylinder 8 abuts against the bottom surface of the PCB board 3. At this time, the lifting cylinder 8 is started so that the PCB board 3 can be lifted by its piston rod. By lifting the PCB board 3, it can not only avoid inaccurate testing caused by slight unevenness or inclination of the conveying track 1, thereby improving the stability and accuracy of the test results, but also effectively isolate the contact between the PCB board 3 and the conveying track 1, avoiding vibrations or mechanical interferences that the track may generate during the resistance testing process, thereby further improving the reliability of the test.
[0032] Referring to Figure 1 and Figure 2 , a first cylinder 6 is also fixedly installed below the PCB board 3 on the conveying track 1. The first cylinder 6 is located on one side of the lifting cylinder 8, and a probe 7 is installed on the piston rod of the first cylinder 6. The probe 7 is used to connect to a multimeter used in cooperation with the resistance testing module. When the PCB board 3 is lifted to an appropriate height, the first cylinder 6 located on one side of the lifting cylinder 8 is started. The piston rod of the first cylinder 6 moves upward, driving the probe 7 installed on it to contact the designated test point on the bottom surface of the PCB board 3. After the probe 7 contacts the welding point of the NTC thermistor on the PCB board 3, the probe 7 is connected to an external multimeter through a wire, and the multimeter immediately measures the resistance value of the thermistor. After the test is completed, the multimeter displays or records the resistance value and judges whether the welding of the NTC thermistor on the PCB board 3 is successful according to the preset standard. If the resistance test is normal, the first cylinder 6, the lifting cylinder 8, and the lifting cylinder 41 are controlled to reset, so that the PCB board 3 continues to be transported on the conveying track 1. If the resistance test is abnormal, the clamping jaw 54 is controlled to clamp the PCB board 3 onto the defective product track 2.
[0033] Referring to Figure 1 and Figure 2, a pressure plate 55 is fixedly connected to the side wall of the clamping jaw 54. During implementation, after lifting the PCB board 3, the pressure plate 55 fixedly connected to the side wall of the clamping jaw 54 is used to first press the PCB board 3 tightly, and then the first cylinder 6 is used to drive the probe 7 to perform a resistance test. The pressure plate 55 presses the PCB board 3 from above before the test, which can effectively prevent the board from displacement or shaking due to external force or vibration during the test. This ensures that the PCB board 3 is in a stable state during the test, thereby improving the contact quality between the test probe 7 and the test point and reducing the test error. After pressing the PCB board 3 tightly, the contact point between the probe 7 and the bottom surface of the PCB board 3 can be more precise and stable. This reduces the problem of inaccurate testing caused by poor contact of the probe 7 and ensures the reliability and consistency of the resistance measurement. In addition, after the PCB board 3 is lifted, the pressure plate 55 fixes it, which can prevent the board from being subjected to excessive mechanical stress or deformation during the test. Especially for multi-layer PCB boards 3 or thinner boards, this pressing operation can effectively avoid physical damage that may be caused during the test.
[0034] In summary, the resistance test module in this application realizes the stable positioning and precise testing of the PCB board 3 by setting the lifting cylinder 8, the first cylinder 6 and the clamping jaw 54 assembly on the conveying track 1. When the PCB board 3 is fixed by the limiting assembly 4, the lifting cylinder 8 lifts the PCB board 3 to avoid the interference of the conveying track 1. Subsequently, the pressure plate 55 of the clamping jaw 54 assembly presses the PCB board 3 tightly from above to ensure that the PCB board 3 will not move due to external force or vibration during the resistance test. The first cylinder 6 drives the probe 7 to contact the NTC thermistor on the PCB board 3 to measure the resistance value. This design effectively solves the problem of inaccurate testing caused by board movement or poor contact in traditional testing, thereby improving the accuracy and reliability of the resistance test and ensuring a more accurate judgment of the welding quality.
[0035] The above are all preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. A resistance test module, characterized in that, It includes a conveying track and a defective product track arranged in parallel. Above the conveying track and the defective product track, there is a clamping component. On the conveying track, there are a sensor, a limiting component, and a first cylinder. The limiting component is used to stop the PCB board transported on the conveying track. Both the first cylinder and the sensor are located below the PCB board. The piston rod of the first cylinder is connected with a probe, and the probe is used to connect with a multimeter for cooperating with the resistance test module.
2. The resistance test module according to claim 1, wherein Below the PCB board on the conveying track, there is a jacking cylinder. The jacking cylinder is located on one side of the first cylinder, and the piston rod of the jacking cylinder abuts against the bottom surface of the PCB board.
3. The resistance test module according to claim 1, wherein The clamping component includes a gantry arranged above the conveying track and the defective product track. On the gantry, there is a first linear module arranged horizontally. On the first linear module, there is a second linear module arranged vertically. And on the second linear module, there is a clamping jaw.
4. The resistance test module according to claim 3, wherein, One side of the clamping jaw is connected with a pressing plate.
5. The resistance test module according to claim 1, wherein The limiting component includes a lifting cylinder and a mounting plate. The lifting cylinder is arranged on the conveying track, and the piston rod of the lifting cylinder is connected with the mounting plate. On the mounting plate, there are limiting blocks.
6. The resistance test module according to claim 5, wherein There are two limiting blocks, and there is a gap for the clamping component to pass through between the two limiting blocks.
7. The resistance test module according to claim 1, wherein, There are two groups of limiting components, and the two groups of limiting components are arranged on both sides of the sensor on the conveying track.
8. The resistance test module according to claim 1, wherein, The sensor is one of a photoelectric sensor, a capacitive proximity sensor, or a laser sensor.