Waterproof directing type piezoelectric touch switch

Abstract

The invention discloses a waterproof directing type piezoelectric touch switch which comprises a button outer shell and a body. A transduction element and a printed circuit board which are connected with each other are installed inside the body. The printed circuit board is connected with an electronic wire outside the body. The transduction element is a piezoelectric ceramic sensor. A signal amplifier is arranged at the connecting position of the piezoelectric ceramic sensor and the printed circuit board. Silica gel is fully filled into the body. Pouring sealant is injected into the connecting position of the body and the electronic wire for sealing. The silica gel and the pouring sealant are connected to form a whole after the silica gel and the pouring sealant are solidified. The waterproof directing type piezoelectric touch switch is simple in structure, good in tightness and high in signal sensitivity, and is a functional switch which is applied to an environment contacted with water or a moist environment. Multifunctional output control can be achieved through an outer circuit. Meanwhile, sensitivity of the switch is improved through assistance and combination of the signal amplifier and the rectifying circuit in the structure, and the waterproof directing type piezoelectric touch switch is novel in touch mode, free of sound in actuating and capable of being easily regarded as an elegant product.

Description

technical field [0001] The invention relates to the application field of piezoelectric ceramic sensors, in particular to a waterproof pointing piezoelectric light touch switch. Background technique [0002] The electronic switch is a new application of control technology after the mechanical switch. Compared with the traditional mechanical switch, the electronic switch has a faster action speed, no sparks at the moment of opening, a longer service life, and a higher frequency of use. [0003] The existing single-wire control AC piezoelectric switch (CN02248852.9) has a complex structure, and more than ten electronic components are involved in the design, which requires high reliability of each component and high requirements for production control; the piezoelectric switch (CN200320123875 .8) The key piezoelectric transducer element is made of piezoelectric film made of polymer material. Although it has good ductility, its excitation energy is low, and the trigger deformatio...

AI Technical Summary

Problems solved by technology

[0003] The existing single-wire control AC piezoelectric switch (CN02248852.9) has a complex structure, and more than ten electronic components are involved in the design, which requires high reliability of each component and high requirements for production control; the piezoelectric switch (CN200320123875 .8) The key piezoelectric transducer element is made of piezoelectric film made of polymer material. Although it has good ductility, its excitation energy is low, and the trigger deformation synchronization is poor (a certain area on a large area One point begins to deform under pressure while other positions are more likely to be touched, resulting in piezoelectric conversion disorder); the switch housing designed by US Patent US5636729 is an open-hole structure, which is not conducive to waterproofing, and it is also designed to install a light guide ring as a press indicator to increase The complexity of the structure is reduced; the improved piezoelectric switch structure (CN200620137267.6) is a structural change based on US5636729, the purpose is especially the thinning of the structure, and its application range is also limited due to structural characteristics; a push-button piezoelectric switch The power generation device (CN201220276981.9) is designed to generate electricity, in which the piezoelectric elements are arranged in layers for energy accumulation, closer to the energy generation end

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