CN2135826Y

CN2135826Y - Film type button switch for computer

Info

Publication number: CN2135826Y
Application number: CN 92225724
Authority: CN
Inventors: 杜满
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-22
Filing date: 1992-06-22
Publication date: 1993-06-09
Anticipated expiration: 2002-06-22

Abstract

The utility model relates to a film type button switch for a computer, particularly a button switch which is suitable for a film type computer, being composed of a button cap, a button frame, a button post, a spring and an elastic piece, wherein, the button post is arranged in the button frame, and the button post is provided with a column tenon in the middle at the lower part and is coated by the spring; the elastic piece which is arranged on one side of the button frame is used for positioning the button post; the button post can be downwardly pressed by the button cap, so that the spring below the button post can be touched on a film circuit, and accordingly, circuits can be switched on among the film circuits of each layer. When the applied force stops, the spring can reset to recover the switching off state of the circuits.

Description

Film type button switch for computer

The utility model relates to a kind of diaphragm type computer key switch, relates to a kind ofly via a keycap, a key frame, a key post more precisely, and a spring and a shell fragment combine are to be applicable to the key switch of diaphragm type computer; A ccontaining key post in the key frame wherein, and key post bottom center has a post tenon and coat by means of a spring, and key frame one side is established a shell fragment and is located with the donating bond post, so that keycap depressed key post and make the spring below it can touch thin film circuit, and make between each layer film circuit and form path, and the application of force is when stopping, but the spring resilience is returned to the circuit its unaccessed state again.

The device that keyboard is used as the computer data input has for a long time, its operation principle is when utilizing each key body to press down, default circuit is connected, and then the literal and the numeral of carrying out this key body are imported, think that computer further handles, therefore, keyboard has its indispensable few indispensability to computer.

Computor-keyboard commonly used, can be divided into mechanical type (MECHANICAL) and diaphragm type (MEMBRANE), mechanical advantage is on key arrangement unrestricted, but decide with the printed circuit board (PCB) of its below, and after its two pin (PINS) passes through printed circuit board (PCB), gave the weldering of tin stove and fixed, so different its development cost of new keyboard of arranging is low, risk is little.But shortcoming is must establish a key switch between keycap and printed circuit board (PCB), the cost of manufacture height of this key switch, and have certain height, also originating, non-keyboard manufacturer can grasp; So in the design of keyboard, must cooperate the upper end appearance of this key switch and height determines keycap with circuit characteristic appearance and fit dimension thereof, simultaneously, its thickness can't change because of key switch, this is light for pursuing, thin, short, little computer product requires, and is maximum obstacle.Simultaneously, on the life-span, because it is the bump mode, so because of operating for a long time and may damaging.

And diaphragm type (MEMBRANE) is on a support plate (FRAME), be convexly equipped with a pillar, and to cover on the elastic ring (RUBBERTONE), then keycap (KEYCAP) on it, and in the feeler lever (PLUNGER) that keycap extended, then pass through the default hole of support plate, it is next for having the thin film switch (MEMBRANE) and a base plate (PLATE) of circuit.The advantage of this mode is to save mechanical key switch, so thickness can greatly reduce, only its shortcoming is because leg portion is one of the forming, so because of very accurate, relative risk increases and the cost raising on making, and the arrangement of keyboard because of above-mentioned disappearance make the arrangement (LAYOUT) of pillar can't the elasticity setting can't conversion, be single arrangement mode only, and die sinking is with high costs, and risk is bigger, and this kind keyboard now generally is used for laptop.

The purpose of this utility model provides a kind of diaphragm type computer key switch that has overcome above-mentioned shortcoming.

For further disclosing concrete technology contents of the present utility model, at first see also diagram, wherein,

Fig. 1 is a three-dimensional exploded view of the present utility model,

Fig. 2 is combination of the present utility model back generalized section (push at the end),

Fig. 3 is the utility model combination back generalized section (pushing).

As shown in the figure, basically, the utility model is You Yi keycap 1, Yi key frame 2, Yi key Zhu 3, and 5 Zu of Yi spring 4 and Yi shell fragment close and form.

Wherein, the hat Wu that keycap 1 Wei knows, its central interior, the prominent Yi cap Sun 11 that establishes, Yi are just for sunk key Zhu 3 and and then push spring 4 Zhi Yong.

Key frame 2 is a hollow box, when actual production, from the key plate 21 many outstanding.Its central authorities have a frame hole 22, and donating bond post 3 passes through, and in a side, two frame ribs 23 is set then, and for the usefulness of shell fragment 5 location, and its opposite side also establishes a rib of column 24, so that itself and 23 ccontaining key posts 3 of frame rib and so as to the location.

Key post 3 is a pillars, and for being placed in 24 of the aforesaid frame rib 23 and the rib of columns, a post hole 31 is established in its below, and it is outstanding that central authorities then have a post tenon 32, so that ammunition feed spring 4 fits then are provided with post groove 33, in addition up with chimeric with cap tenon 11.

It is up-narrow and down-wide horn-like that spring 4 slightly is, and be sleeved on post tenon 32, and only the below then contact with conductive film, so that during its stressed pressing down, can make the conductive film connection, and when not stressing, but resilience again (its schematic diagram is as shown in Figures 2 and 3).

Shell fragment 5 is the back bending of metal one, its sheet plate 51 is embedded between aforementioned frame rib 23 and the outer wall, and the sheet of its oblique extension folder 52 then is packed in a wall of key post, thinks the location, and can be when pushing key post 3 contact with sheet folder 52 and cause the sound, to determine to push the accuracy of input.

After combination, as shown in Figures 2 and 3, the key plate 21 that comprises many key switches is the upper stratas at thin film switch, when then pushing keycap 1, key post 3 presses down and makes spring 4 to press and thin film switch at once, and then makes the topmost thin film circuit touch lower film circuit and then connection circuit, and when loosing one's grip, spring 4 resiliences, and key post 3 is risen, and the anxiety of falling under not having for 52 packings of sheet folder.

So the utility model can integrally formedly be provided with some key frames 2 on key plate 21, and the combination simple and feasible between the element, escapable cost for diaphragm type computer key switch, is a quantum jump in fact.

Claims

1, a kind of diaphragm type computer key switch is characterized in that comprising:

One keycap is a hat thing, and central interior is down prominent establishes a cap tenon, so that the sunk key post;

One key frame is the open box body of hollow, many settings of one on the key plate, and its central authorities have a frame hole runs through, and the donating bond post passes through, and a side is established two frames and is helped ammunition feed sheet location, and side is then established a rib of column in addition, so that itself and the ccontaining key post of frame intercostal;

One key post is a pillars, places between the frame rib and the rib of column, and the below is established a post hole and had a post tenon and extends, and a post groove is then established in the top, so that chimeric with the cap tenon;

One spring is sleeved on the post tenon, and the below contacts with thin film switch;

One shell fragment is embedded between frame rib and outer wall by a slice plate, and the oblique Extendible flake folder of one is with packing key post.