CN201112203Y

CN201112203Y - Film circuit microswitch

Info

Publication number: CN201112203Y
Application number: CNU2007200568369U
Authority: CN
Inventors: 徐孝海
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-11
Filing date: 2007-09-11
Publication date: 2008-09-10
Anticipated expiration: 2017-09-11

Abstract

The utility model relates to the technical field of circuit switches, in particular to a membrane circuit microswitch. A lower cover of the membrane circuit microswitch is provided with positive and negative hardware chips the upper ends of which are connected with a membrane circuit switch in a compacting way; the upper end of the membrane circuit switch is provided with a flexible press key, a spring sheathed on the flexible press key and a switch press key arranged at the upper end of the spring in sequence, wherein, the upper end of the switch press key runs through a through hole arranged on an upper cover of the switch by extruding outside the upper cover thereof; both sides of the interior of the upper cover of the switch are respectively provided with soft hold-down strips and the lower end of the hold-down strip compacts a non-overlying end of an upper chip and a lower chip of the membrane circuit switch and a silver paste face on the membrane circuit switch is connected with the positive and negative hardware chips. The membrane circuit microswitch of the utility model makes use of the principle of contact resistance of the membrane circuit switch and changes the contact resistance to connect or disconnect the circuit by loosening or pressing a contact of the membrane circuit switch with the press key so as to ensure the membrane circuit microswitch has better safety performance, lower noise and longer service life.

Description

A kind of inching switch for thin-film circuit

Technical field

The utility model relates to the contactor technical field, particularly a kind of inching switch for thin-film circuit.

Background technology

Sensitive switch because its have that volume is little, in light weight, simple operation and other advantages and being widely used in the products such as calculator, computer, but deficiency such as sensitive switch ubiquity commonly used at present complex structure, operation sound is bigger, and useful life is short.

The utility model content

The purpose of this utility model is at the deficiencies in the prior art, and the security performance that provides a kind of contact resistance principle of utilizing the thin film circuit switch to make is good, and noise is low, the inching switch for thin-film circuit of long service life.

Adopt following technical scheme for achieving the above object:

A kind of inching switch for thin-film circuit, it includes switch loam cake, switch lower cover, it is characterized in that: described switch lower cover is provided with two lower ends and draws positive and negative electrode five metals sheet outside lid, the upper end of positive and negative electrode five metals sheet is connected with the thin film circuit switch to compress mode, described thin film circuit switch by scribble silver slurry surface layer and wherein an end be equipped with under the switch last slice of contact and the switch in the sheet and the switch that plays buffer action the sheet stack and form; The switch key that is disposed with flexible keypad in the upper end of stack place, is enclosed within the spring on the flexible keypad and is arranged on the spring upper end; The upper end of described switch key is passed with the form that protrudes from the switch loam cake and is arranged on a through hole that covers on the switch, both sides, inside at described switch loam cake are respectively arranged with soft press strip, an end of the non-stack of sheet under thin film circuit switch last slice and the switch is pressed in the lower end of described soft press strip, and the silver slurry face on the thin film circuit switch is connected with positive and negative electrode five metals sheet.

Cover on the described switch and offer draw-in groove, the switch lower cover is provided with trip, and switch loam cake and switch lower cover are connected by draw-in groove and trip.

Described positive and negative electrode five metals sheet and switch lower cover are shaped to one.

The beneficial effects of the utility model are: it includes switch loam cake, switch lower cover, it is characterized in that: described switch lower cover is provided with two lower ends and draws positive and negative electrode five metals sheet outside lid, the upper end of positive and negative electrode five metals sheet is connected with the thin film circuit switch to compress mode, described thin film circuit switch by scribble silver slurry surface layer and wherein an end be equipped with under the switch last slice of contact and the switch in the sheet and the switch that plays buffer action the sheet stack and form; The switch key that is disposed with flexible keypad in the upper end of stack place, is enclosed within the spring on the flexible keypad and is arranged on the spring upper end; The upper end of described switch key is passed with the form that protrudes from the switch loam cake and is arranged on a through hole that covers on the switch, both sides, inside at described switch loam cake are respectively arranged with soft press strip, an end of the non-stack of sheet under thin film circuit switch last slice and the switch is pressed in the lower end of described soft press strip, silver on thin film circuit switch slurry face with just, negative pole five metals sheet connects, so a kind of inching switch for thin-film circuit utilizes the contact resistance principle of thin film circuit switch, unclamp or push the contact of tight wiring thin film switch by button, change contact impedance and connect circuit or open circuit, make its security performance better, noise is lower, longer service life.

Description of drawings

Fig. 1 is a decomposing schematic representation of the present utility model;

Fig. 2 is a front section view of the present utility model;

Partial sectional view when Fig. 3 unclamps for switch key of the present utility model;

Partial sectional view when Fig. 4 compresses for switch key of the present utility model;

Embodiment

Below in conjunction with accompanying drawing the utility model is further described:

Shown in accompanying drawing 1 to 4: a kind of inching switch for thin-film circuit, it includes switch loam cake 1, switch lower cover 2, described switch lower cover 2 is provided with two lower ends and draws positive and negative electrode five metals sheet 4 outside lid, the upper end of positive and negative electrode five metals sheet 4 is connected with thin film circuit switch 5 to compress mode, described thin film circuit switch 5 by scribble silver slurry surface layer and wherein an end be equipped with under the switch last slice 7 of contact 6 and the switch in the sheet 8 and the switch that plays buffer action sheet 9 stacks and form; The switch key 12 that is disposed with flexible keypad 10 in the upper end of stack place, is enclosed within the spring 10 on the flexible keypad 10 and is arranged on spring 10 upper ends; A through hole 13 that is arranged on the switch loam cake 1 is passed in the upper end of described switch key 12 with the form that protrudes from switch loam cake 1, be respectively arranged with soft press strip 14 in the both sides, inside of described switch loam cake 1, an end of sheet 8 non-stacks under thin film circuit switch 5 switches last slice 7 and the switch is pressed in the lower end of described soft press strip 14, and the silver slurry face on the thin film circuit switch 5 is connected with positive and negative electrode five metals sheet 4.Wherein positive and negative electrode five metals sheet 4 can be an one by injection mo(u)lding with switch

lower cover

2, and 2 of switch loam cake 1 and switch lower covers assemble with trip 16 by draw-in groove 15 and be connected.

The contact resistance principle of the utility model applied film contactor is unclamped or the contact 6 of extrusion film contactor 5 by switch key 11, changes its contact impedance, thereby connects circuit or open circuit.When switch is in releasing orientation, switch key 12, spring 11, flexible keypad 10 are in nature, and the contact 6 of thin film circuit switch 5 last slice 7 and following sheet 8 is zero contact condition, and resistance is very big, and whole switching circuit is in normally off, the disconnection of positive and negative electrode circuit.When switch key 12 stressed pressing down, spring 11, flexible keypad 10 are followed stressed pressing down, the contact 6 of flexible keypad 10 extrusion film contactors 5 last slice and following sheet, make thin film circuit switch contact 6 be complete contact condition, resistance moment reduces, whole switching circuit is in connecting state, and the positive and negative electrode circuit is connected.Spring 11, flexible keypad 10 compressive deformations have rebound characteristics simultaneously.When the pressure of trip switch button 12, under the effect of the rebound characteristics of spring 11, flexible keypad 10, switch key 12 quick resiliences, whole switch is got back to releasing orientation again.

The elastic construction of this switch is had the following advantages by spring 11 and flexible keypad 10 common compositions: spring 11, flexible keypad 10 move up and down and can't produce dry sound, and thin film circuit switch 5 small variations more can not produce dry sound, so quiet effective; Whole push button longevity guarantees by spring 11, flexible keypad 10, and the useful life of spring 11 and flexible keypad 10 all more than 10,000,000 times, so the life-span of whole button also can reach more than 10,000,000 times.

The silver slurry face and positive and negative electrode five metals sheet 4 pressurizeds of thin film circuit switch 5 closely link, and form the assembly mode of pressing, and thin film circuit switch 5 is by piecing together mode with the pressure of positive and negative electrode five metals sheet 4, and transmission circuit is given outside the binding, as the binding of pcb plate.

Certainly, the embodiment of the above, it is preferred embodiments of the present utility model, be not to limit the utility model practical range, so all equivalences of doing according to the described structure of the utility model claim, feature and principle change or modify, and are included in the utility model claim.

Claims

1, a kind of inching switch for thin-film circuit, it includes switch loam cake, switch lower cover, it is characterized in that: described switch lower cover is provided with two lower ends and draws positive and negative electrode five metals sheet outside lid, the upper end of positive and negative electrode five metals sheet is connected with the thin film circuit switch to compress mode, described thin film circuit switch by scribble silver slurry surface layer and wherein an end be provided with under the switch last slice of contact and the switch in the sheet and the switch that plays buffer action the sheet stack and form; The switch key that is disposed with flexible keypad in the upper end of stack place, is enclosed within the spring on the flexible keypad and is arranged on the spring upper end; The upper end of described switch key is passed with the form that protrudes from the switch loam cake and is arranged on a through hole that covers on the switch, both sides, inside at described switch loam cake are respectively arranged with soft press strip, an end of the non-stack of sheet under thin film circuit switch last slice and the switch is pressed in the lower end of described soft press strip, and the silver slurry face on the thin film circuit switch is connected with positive and negative electrode five metals sheet.

2, a kind of inching switch for thin-film circuit according to claim 1 is characterized in that: cover on the described switch and offer draw-in groove, the switch lower cover is provided with trip, and switch loam cake and switch lower cover are connected by draw-in groove and trip.

3, a kind of inching switch for thin-film circuit according to claim 1 is characterized in that: described positive and negative electrode five metals sheet and switch lower cover are shaped to one.