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Insertion force test
The force required to remove the plug from the device head or socket, or to separate the male and female connectors in half.
Insertion force test is a key test to evaluate the insertion and extraction performance of connectors (such as plugs, sockets, male and female connectors), aiming to measure insertion and extraction forces to ensure that the connector is easy to plug and has sufficient retention during use. The following are the key elements and steps of the insertion force test:
1. Test objectives
Insertion force: measures the force required to insert a plug into a socket or connector.
Pull out force: measures the force required to pull a plug out of a socket or connector.
Retention force: Ensure that the connector has sufficient mechanical stability after insertion to avoid accidental detachment.
2. Testing conditions
Testing equipment: Use a tensile testing machine or a specialized insertion and extraction force tester.
Test speed: usually 25-50 mm/min, simulating actual insertion and extraction speed.
Test frequency: Usually multiple insertions and removals (such as 10 times) are performed to evaluate the durability of the connector.
Environmental conditions: Test under standard conditions (such as temperature of 25 ° C and humidity of 50%), or simulate extreme environments for additional testing.
3. Testing equipment
Tensile testing machine: It can accurately control the testing speed and measure the force value.
Special fixtures: used to secure connectors and plugs to ensure testing consistency.
Data logger: Record the variation curves of insertion force and extraction force.
4. Testing steps
prepare
Clean the connectors and plugs to ensure that there is no dust or foreign matter affecting the test results.
Fix the connector and plug onto the testing equipment.
Insertion force test:
Start the testing equipment and insert the plug into the connector at the specified speed.
Record the maximum force value during the insertion process.
Pull out force test:
Start the testing equipment and unplug the plug from the connector at the specified speed.
Record the maximum force value during the extraction process.
Repeated testing:
Repeat insertion and extraction multiple times (such as 10 times), and record the insertion and extraction forces for each time.
Data analysis:
Calculate the average, maximum, and minimum values of insertion and extraction forces.
Evaluate the durability and consistency of connectors.
5. Judgment criteria
Insertion force: It is usually required that the insertion force does not exceed the specified value (such as 20N) to ensure ease of insertion and removal.
Pulling force: It is usually required that the pulling force should not be lower than the specified value (such as 5N) to ensure that the connector has sufficient holding force.
Consistency: After multiple insertions and removals, the insertion and extraction forces should remain stable without significant changes.
6. Improvement measures
Optimize contact design: Adjust the shape and material of the connector contact pieces to reduce insertion force.
Increase retention: Improve the locking mechanism of the connector (such as buckles and threads) and increase the pull-out force.
Material selection: Choose materials with low friction coefficient or high elasticity to improve insertion and removal performance.
Surface treatment: Coating the contact surface (such as gold plating, silver plating) to reduce friction and improve durability.
7. Common standards
IEC 60512: Testing standard for electronic device connectors.
EIA-364-13: Standard for testing the insertion and extraction force of electronic connectors.
GB/T 5095: Chinese Electronic Equipment Connector Testing Standard.
8. Precautions
Test consistency: Ensure that the insertion and extraction speed and direction are consistent for each test.
Cleaning and maintenance: Regularly clean connectors and testing fixtures to avoid contamination that may affect test results.
Environmental simulation: Consider the influence of environmental factors such as temperature and humidity on the insertion and extraction force.
Safe operation: Avoid inserting and unplugging too quickly during testing to prevent connector damage or personal injury.
By conducting insertion force tests, the plug-in performance of connectors can be evaluated, ensuring that they are easy to operate and have reliable mechanical stability in practical use, meeting design and application requirements.
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