Reflowable Thermal Cutoffs
A thermal fuse and soldering technology, which is applied in the direction of electrical components, thermal switches, electric switches, etc., can solve the problems of increasing the complexity and cost of the manufacturing process, adding more manufacturing process steps and electrification equipment, and achieving simplified manufacturing process and Equipment, high reliability, high reliability effect
Active Publication Date: 2019-04-23
POLYTRONICS TECH
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Problems solved by technology
Therefore, this design must carry out the step of energizing and disconnecting the suppression element 13 after reflowing, which will add one more manufacturing process step and energizing equipment, thus increasing the complexity and cost of the manufacturing process
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[0061] In order to make the above and other technical contents, features and advantages of the present invention more comprehensible, the following specifically cites relevant embodiments, together with the accompanying drawings, for a detailed description as follows.
[0062] Because the high temperature during reflow will cause the elastic conductive parts in the thermal fuse to separate from the solder pads, resulting in electrical disconnection, it is necessary to use suppression components to resist the force that causes electrical disconnection. Figure 2-5 A reflowable thermal fuse according to an embodiment of the present invention is shown. figure 2 A three-dimensional schematic view of the reflowable thermal fuse 20 is shown, which includes a base 21 , a cover 22 matched with the base 21 , and a restraining element 26 . image 3 An exploded perspective view showing the reflowable thermal link 20 without the suppressor element 26 therein. In this embodiment, the bas...
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The present invention proposes a reflowable thermal fuse which includes a base, a cover, an elastic conductive member, a sensing connector, and a suppression element; the base includes first and second solder pads, and is combined with the cover to form an internal accommodating space; the elastic conductive member includes a first end and a second end, the first end is connected to the first welding pad, and the second end can be connected to the second welding pad; the elastic conductive member has the ability to release the second The elastic restoring force of the connection between the two ends and the second welding pad; the sensing connector connects the second end of the elastic conductive member and the second welding pad; the suppression element comprises a pressing part, and the pressing part passes through the surface of the cover an opening of the elastic conductive member, and the end presses against the second end of the elastic conductive member to resist the elastic recovery force of the elastic conductive member during reflow. After the fuse is reflowed, the inhibiting member is removed, so that the fuse is in an actuated state; when a high temperature error condition occurs, the elastic restoring force of the elastic conductive member releases the connection between the second end and the second welding pad.
Description
technical field [0001] The present invention relates to a thermal fuse, in particular to a reflowable thermal fuse. Background technique [0002] With the development of science and technology, electric / electronic products are increasingly diversified and complex, and the circuit protection components used are not limited to the simple glass tube fuses in the past, but have developed into a wide variety of emerging electronic components. With the upgrading of electronic products, the requirements for reliability and safety are increasing, especially people will pay more attention to the development and application of various circuit protection components. [0003] Increasing Importance of Circuit Protection Components In various electronic products, there is a growing tendency to install over-current protection and over-voltage protection components. According to statistics, more than 75% of the failures in electronic products are caused by overcurrent or overvoltage. As p...
Claims
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IPC IPC(8): H01H37/76
CPCH01H37/70H01H37/761H01H2037/046H01H2037/763H01H2037/762
Inventor 何建成王绍裘
Owner POLYTRONICS TECH