A device for detecting the resistance value of a camera module to ground

Abstract

The utility model provides a device for detecting the ground resistance of a camera module, the device includes a fixture, a test PCB board, a test box and a PC end, the camera module can be fixed in the fixture, the bottom and side walls of the fixture are provided with ejectors, the ejectors at the bottom can be used as the lead pins for reinforcing the steel sheet on the back of the camera module connector, the ejectors on the side walls can be used as the lead pins of the camera module motor housing, the lead pins are all connected to the test pins of the test PCB board, the PIN pins of the test PCB board are inserted into the female seat of the test box, the test box supplies power to the test pins of the test PCB board, the PC end reads the test current value, obtains the ground resistance of the camera module by calculation, and compares the ground resistance with the standard resistance value set in advance, and finally obtains the ground resistance of the camera module and the detection result. The device can effectively control the manpower and time costs, and at the same time the test data is more accurate, and data storage and comparison can also be done, and the detection efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of camera module testing, in particular to a device for detecting the resistance value of a camera module to the ground. Background Art

[0002] The rapid progress of the mobile phone industry directly promotes the development of mobile phone camera modules. In the process of development, in addition to CMOS photosensitive chips, FPC and motors, as important assembly components, have a great impact on the performance of camera modules. In the production of camera modules, in order to ensure the normal operation of the camera module, the module factory needs to test the ground resistance of the FPC steel sheet reinforcement and the motor iron shell in the camera module.

[0003] When mounting components on FPC, some components are backed by reinforced steel sheets, which are used to partially reinforce the soft board in that area so that it does not bend. This reduces the risk of component pins breaking due to bending in later operations. During the FPC production process and the camera module production process, the steel sheet reinforcement may be damaged or broken, causing the FPC to not function properly. Therefore, it is necessary to test the resistance of the steel sheet reinforcement to the ground to meet the requirements of use.

[0004] The motor iron shell is the outer shell of the motor, which is used to protect the internal magnets, coils and other components. During the motor production process and the camera module production process, the motor iron shell may be damaged, which may cause the motor to not work properly. Therefore, it is necessary to test the ground resistance of the motor iron shell to meet the requirements of use.

[0005] However, whether it is the detection of the resistance value of the FPC steel sheet reinforcement to the ground or the detection of the resistance value of the motor housing to the ground, the existing test method can only be manually tested using a multimeter instrument. This method is not easy to operate, the error value of reading the multimeter data is large, and the key is low efficiency. Therefore, it is urgent to propose a design solution on how to simplify and clarify the test method, simplify data extraction, and effectively improve production efficiency. Utility Model Content

[0006] The purpose of the utility model is to provide a device for testing the resistance of a camera module to the ground, so as to solve the problem that the detection result error of the resistance of the existing camera module to the ground is large and the detection efficiency is low. The specific technical solution is as follows:

[0007] A device for detecting the resistance value of a camera module to ground, the device comprising a fixture, a test PCB board, a test box and a PC end, the fixture is located above the test PCB board, the test box is located below the test PCB board, the bottom and side walls of the fixture are both provided with ejector pins, a side of the test PCB board close to the fixture is provided with a plurality of test pins, a side of the test PCB board close to the test box is provided with a plurality of PIN pins at positions corresponding to the test pins, the ejector pins can be electrically connected to the test pins, the PIN pins can be inserted into the female socket of the test box, and the test box is electrically connected to the PC end.

[0008] Furthermore, when the camera module is fixed in the jig, the ejector pins at the bottom of the jig correspond to the reinforcing steel sheet on the back of the camera module connector, and the ejector pins on the side wall of the jig correspond to the motor housing of the camera module.

[0009] Furthermore, the bottom ejector pin of the fixture is connected to the test pin DOVDD of the test PCB board, and the side wall ejector pin of the fixture is connected to the test pin AVDD of the test PCB board.

[0010] Furthermore, the test box is connected to the PC via a USB data cable.

[0011] Furthermore, the test box may be Duxin Tooling MU950 or Sanyingxing Tooling USB3.0-V10.

[0012] Furthermore, the standard voltage output by the test box may be 1V.

[0013] Furthermore, the load resistance of the test PCB board is 10Ω.

[0014] The utility model provides a device for detecting the resistance value of a camera module to the ground, which has the following beneficial effects compared with the prior art:

[0015] 1. The utility model provides a device for detecting the resistance value of a camera module to the ground, which effectively controls the manpower cost and time cost, and the detection data is more accurate.

[0016] 2. The utility model provides a device for detecting the resistance value of a camera module to the ground, which can perform data storage and comparison work in accordance with customer requirements, and has higher detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a device for detecting the resistance of a camera module to the ground provided by the utility model;

[0018] Figure 2The utility model is a side view schematic diagram of a device for detecting the resistance value of a camera module to the ground. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings provided by the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0020] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connection" and "connected" should be interpreted in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the description of the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inside" and "outside" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] Embodiment: This embodiment provides a device for detecting the resistance of a camera module to ground. Figure 1 As shown, the device includes a fixture 1, a test PCB board 2, a test box 3, and a PC end connected to the test box 3. The fixture 1 is fixed above the test PCB board and can be used to fix the camera module. The test box 3 is located below the test PCB board 2 and can supply power to the test pin of the test PCB board 2. The test box 3 and the PC end are connected using a USB data cable. The PC end can process the test data to obtain the ground resistance value and detection results of the camera module.

[0023] Specifically, the bottom and side walls of the jig 1 are provided with ejector pins, and the positions of the ejector pins correspond to the positions of the camera module where the resistance value needs to be tested. When the camera module is fixed in the jig 1, the ejector pins at the bottom of the jig 1 just contact the reinforcing steel sheet on the back of the FPC connector of the camera module, and the ejector pins serve as the lead-out pins of the reinforcing steel sheet to lead out the test connection points; the ejector pins on the side walls of the jig 1 just contact the motor housing of the camera module, and the ejector pins serve as the lead-out pins of the motor housing to lead out the test connection points. A plurality of test pins are provided on one side of the test PCB board 2 close to the jig 1, and the ejector pins of the jig 1 are electrically connected to the test pins of the test PCB board 2, the test connection points of the reinforcing steel sheet are connected to the DOVDD test pins of the test PCB board 2, and the test connection points of the motor housing are connected to the AVDD test pins of the test PCB board 2.

[0024] For details, see Figure 2 As shown, a PIN pin is provided at a position corresponding to the test pin on one side of the test PCB board 2 close to the test box 3. The PIN pin of the test PCB board 2 can be inserted into the female socket of the test box 3, and the test box 3 can supply power to the test pin of the test PCB board 2.

[0025] Optionally, the test box 3 may be Duxin tooling MU950 or Sanyingxing tooling USB3.0-V10.

[0026] Optionally, the standard voltage output by the test box 3 may be 1V.

[0027] Optionally, the load resistance of the test PCB board is 10Ω.

[0028] The working principle of the device is: open the fixture 1, fix the camera module in the fixture 1, insert the PIN pin of the test PCB board 2 into the female socket of the test box 3, the test box is connected to the PC end through the USB data cable, turn on the switch of the test box 3, and the test box 3 supplies power to the AVDD and DOVDD test pins of the test PCB board 2. For example: its output voltage standard is 1V, and the load resistance of the test PCB board is 10 ohms. After power is turned on, the current value is read through the PC end and then the corresponding resistance value is obtained using Ohm's law. Finally, the load resistance value of the test PCB board is subtracted to obtain the ground resistance of the motor housing and the steel sheet reinforcement. At the same time, the standard value of the ground resistance of the reinforced steel sheet and the motor housing is set in the software on the PC end. By comparing the test value with the standard value, the final test result of whether the ground resistance of the camera module tested is qualified can be obtained.

[0029] Those skilled in the art should understand that the present invention can be implemented in many other specific forms without departing from the spirit and scope of the present invention, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

Claims

1. A device for detecting the resistance of a camera module to ground, characterized in that: The device comprises a fixture (1), a test PCB (2), a test box (3) and a PC end, wherein the fixture (1) is located above the test PCB (2), the test box (3) is located below the test PCB (2), the bottom and side walls of the fixture (1) are both provided with ejector pins, a side of the test PCB (2) close to the fixture (1) is provided with a plurality of test pins, a side of the test PCB (2) close to the test box (3) is provided with a plurality of PIN plugs at positions corresponding to the test pins, the ejector pins are electrically connected to the test pins, the PIN plugs can be inserted into a female socket of the test box (3), and the test box (3) is electrically connected to the PC end.

2. The device for detecting the resistance of a camera module to ground according to claim 1, characterized in that: When the camera module is fixed in the jig, the ejector pins at the bottom of the jig (1) correspond to the reinforcing steel sheet on the back of the camera module connector, and the ejector pins on the side wall of the jig (1) correspond to the motor housing of the camera module.

3. The device for detecting the resistance of a camera module to ground according to claim 2, characterized in that: The bottom ejector pin of the jig (1) is connected to the test pin DOVDD of the test PCB board (2), and the side wall ejector pin of the jig (1) is connected to the test pin AVDD of the test PCB board (2).

4. The device for detecting the resistance of a camera module to ground according to claim 1, characterized in that: The test box (3) is connected to the PC via a USB data cable.

5. The device for detecting the resistance of a camera module to ground according to any one of claims 1 to 4, characterized in that: The test box (3) is Duxin tooling MU950 or Sanyingxing tooling USB3.0-V10.

6. The device for detecting the resistance of a camera module to ground according to claim 5, characterized in that: The standard voltage output by the test box (3) is 1V.

7. The device for detecting the resistance of a camera module to ground according to claim 6, characterized in that: The load resistance of the test PCB board (2) is 10Ω.

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