CN2123814U

CN2123814U - Spring sheet type key switch

Info

Publication number: CN2123814U
Application number: CN 92203373
Authority: CN
Inventors: 邵鸿元
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-27
Filing date: 1992-02-27
Publication date: 1992-12-02

Abstract

The utility model relates to a key switch. In order to overcome the defects that a key switch has many parts and the structure is complicated in the prior art, a supporting column on the base of the switch of the utility model is provided with a reed which has proper deformation according to the characteristic that the deformation of an elastic thin sheet has certain driving regulation; both ends of the reed are arranged in the concave groove of the base; a cover plate is fixed on the base. When the key is pushed down, as the resultant force of the concave wave caused by the pre-stress of the reed is downward, the waveform can reliably stop within the interval, and the purposes of self locking and mutual locking are achieved. The utility model has the advantages of less parts, simple structure, low cost, high reliability, and long service life.

Description

Spring sheet type key switch

The utility model relates to a kind of switching device, reed-type keyboard switch particularly, and it belongs to essential electronic element.Be applicable to general electromechanical equipment, be particularly useful for household electric appliances, light fixture and other need mechanical linkage apparatus operating.

The structure of keyboard switch is to be combined by interlocks such as a plurality of thick stick spares, springs in the prior art, and with regard to the keyboard switch by existing electric fan, it is combined by 17 parts such as base plate, interlock plate, spring and interlocking sheets, and part is many, complex structure.Not enough more than the same existence of general spring-plate type single connection plane switch, this makes that the workload of making and assembling is bigger, and cost is higher.

Task of the present utility model is to overcome existing above-mentioned deficiency in the prior art, and a kind of reed-type keyboard switch of simple in structure, dependable performance is provided, to reach simplified structure, to save raw-material purpose.

The task that the utility model proposed is finished by following measure.The feature that has certain transmission rule according to the deformation of elastic sheet, the utility model has been installed the reed of an an amount of predeformation on the base of switch, because be connected with one or several pillars on the base plate of base, so base plate is divided into several intervals, this pillar just plays a part fulcrum.When key is down pressed, when applying an external force promptly for reed between certain two fulcrum, the waveform of this section reed is just downward, equally, when applying an external force for reed between other two fulcrums, then original waveform just reaches on now stressed this section reed again, because the formed recessed ripple of prestressing force of reed is made a concerted effort downwards, this waveform can be stopped in this interval reliably, reach the purpose of self-locking and interlocking.Meanwhile, when reed when pressing down, make the power connection that this is interval, and other interval power supply disconnects, like this, just played and connected one the tunnel and disconnect the interlock effect on other each road.

The accompanying drawing drawing is described as follows:

Fig. 1 represents vertical view of the present utility model.

Fig. 2 represents A-A cutaway view of the present utility model.

Fig. 3 represents B-B cutaway view of the present utility model.

Fig. 4 represents the vertical view of the touch structure of the utility model.

Fig. 5 represents the C-C cutaway view of the touch structure of the utility model.

Fig. 6 represents the D-D cutaway view of the touch structure of the utility model.

Fig. 7 represents the vertical view of the utility model all-wave driving type.

Fig. 8 represents the E-E cutaway view of the utility model all-wave driving type.

Fig. 9 represents the F-F cutaway view of the utility model all-wave driving type.

Following the utility model will be further described embodiment in conjunction with the accompanying drawings.

Embodiment one:

Fig. 1, Fig. 2, Fig. 3 have described the structure of the utility model quadruple linkage half-wave driving type.It is made up of base 1, cover plate 2, reed 3, key 4, stop key 5, power supply movable contact spring 6, static contact 7 and screw 8.The reed 3 of an amount of predeformation is installed in the bottom of cover plate 2, and its two ends are separately fixed on the fulcrum of base 1 both sides with screw 8.Three pillars 9 are arranged on the base 1, cover plate 2 usefulness screws 8 are fixed on the base 1, leave the gap between its plane and the pillar 9, and the two ends of reed 3 are in the groove of base 1, so that reed 3 passes through in this gap, the waveform that utilizes reed 3 is in pillar 9 intercropping half-waves or all-wave transmission.

During use, press key 4(and can press any key), this moment should place's reed 3 waveform downward, simultaneously, reed 3 with the movable contact spring 6 of power supply to pressing down, movable contact spring 6 is contacted with static contact 7, this road is connected, and other each key height is constant, and reed 3 is straight shape, power supply is an off-state also, has reached to connect one the tunnel and disconnect the interlock purpose on other each road.If press stop key 5, because the bottom non-transformer contact of stop key 5, then each road is off-state.In this structure, after pressing, do not lift stop key 5, and this is applicable to that some need demonstrate the equipment of halted state, if concerning need the contour equipment of each key when stopping, as long as add a little reed for 5 times at stop key, and improvement gets final product a little.

In addition, this reed-type keyboard switch also can be made two-key type, triple bond formula or greater than the quadruple linkage formula.

The alleged half-wave driving type of present embodiment is meant: when place's waveform of reed 3 was downward, other was the situation of straight shape everywhere.

Embodiment two:

Fig. 4, Fig. 5, Fig. 6 have described the structure of touch keyboard switch.It is made up of base 1, key plate 10, contact block 11, reed 3, cover plate 2, power supply movable contact spring 6 and static contact 7.Key plate 10 usefulness films are made, can be bonding between key plate 10, contact block 11 and the cover plate 2.Because the stroke of reed 3 is less, as long as click key plate 10 slightly, can reach the purpose of commutation during operation, and the lifting the elasticity that only need quote film itself and can realize of key plate 10.

In addition, but key plate 10, contact block 11 and cover plate 2 also injection molded, as a part.

Embodiment three:

Fig. 7, Fig. 8, Fig. 9 have described the structure of the utility model all-wave driving type.It by button 12, reed 3, base 1 ', little axle 13 and power-line terminal 14,15 form.The reed 3 of an amount of predeformation be fixed on base 1 ' on, reed 3 passes the gap below little axle 13.During commutation, press the key end that lifts, button 12 just rotates around little axle 13, and the plush copper 17 under the button 12 is by touching reed 3, and simultaneously with reed 3 to pressing down, reed 3 is contacted, this road connection with the contact 16 of power-line terminal 6.

Present embodiment only base 1 ' an interval C in be provided with contact 16, be single connection plane switch.Also can base 1 ' two interval C, D in all establish contact, become ganged switch.In addition, also can adopt half-wave driving type shown in embodiment one.

The alleged all-wave driving type of present embodiment is meant: when the waveform of reed 3 in interval C is downward, and the situation that the waveform in interval D makes progress.Otherwise too.

The utility model compared with prior art has the following advantages: the internal structure of switch is simplified, and part reduces half, makes and assemble easy, has reduced cost; The open and close dependable performance, the life-span of having improved power contact head. Touch key switch can be made into integral seal structure, and is particularly suitable to waterproof and dustproof equipment.

Claims

1, a kind of keyboard switch, form by base, cover plate, key, reed and power supply movable contact spring and static contact, the movable contact spring of power supply and static contact are connected on the base, it is characterized in that: base 1 is provided with pillar 9, the reed 3 of one predeformation is installed on the pillar 9 of base 1, the two ends of reed 3 are in the groove of base 1, and cover plate 2 usefulness screws 8 are fixed on the base 1.