In manual operation, the switch action can be divided into two stages. The first stage is to pull the trigger by hand towards the middle until the trigger is in the vertical position. At this time, the pointed top of the single-pole slider also gradually moves towards the middle until it reaches the middle position, which further compresses the compression spring. After the trigger has passed the vertical position, the single-pole slider moves rapidly in the other direction under the pressure of the compression spring, and drives the trigger to turn rapidly. The contact pins are quickly turned on, which is the second stage. At this time, the separation speed of the contacts is related to factors such as the pressure of the compression spring and the friction between the moving parts, and the speed is very high. According to the test, the time from the disengagement of the contact to the reconnection is only about milliseconds, and the average speed is several millimeters. This speed is many times faster than manual pull speeds or motorized test pull speeds.
Toggle Switch Precautions
(1). First of all, the appropriate type of switch and connector should be selected according to the conditions of use and functions.
(2). The rated voltage and current of the switch and connector must have a certain margin
(3). For reliable contact, the number of contacts of the switch and the number of wires of the connector should be left with a certain margin for parallel use or backup.
(4) Try to choose connectors with positioning, so as to avoid faults caused by wrong insertion.
(5) The wiring and welding of the contacts are reliable. In order to prevent disconnection and short circuit, the welding place should be protected by sleeves.
Life Test of Toggle Switches
Since the test life of the switch is obviously related to the speed of the plate during the test, in order to measure a correct service life, there should be a correct test speed. Since the test life should reflect the service life of manual operation, the pulling speed of this motorized test should be consistent with the manual pulling speed. That is, the value of the manual pull speed should be tested.
Using the millisecond meter to test the conduction interruption time can measure the pulling time of the toggle switch handle from one extreme position to another extreme position. The pulling speed can be calculated from the pulling time and pulling distance. This speed is the average speed over the entire pulling distance. According to the actual test, the manual pulling speed is different when the operator is not in operation, and the same operator also has a difference between the three exercises, and the average is about 100%. between a millisecond.
Although there is no domestic standard for the toggle switch test pulling speed, there are still foreign standards for reference. The General Specification for Sealed Toggle Switches of the United States Military Specification formulated in the year, month, and day stipulates that the toggle switch should be driven by a motorized drive at a speed of one minute, one inch and one state second. In the test conditions of the above-mentioned hunger switch standard, while specifying the number of tests per minute, the test pulling speed is specified, and its value is one inch second, that is, millimeter second. This aspect shows that it is necessary to specify a test speed, and the test speed value specified in this standard is relatively close to the manual pull speed obtained by our test, and the difference may be caused by the difference in the manual operation speed of each person. . This manual operation pulling speed is still relatively reasonable for the motorized test drive speed. For the sake of uniformity, the range can also be narrowed down to one millimeter second.