CN2139301Y

CN2139301Y - Improved key

Info

Publication number: CN2139301Y
Application number: CN92226101U
Authority: CN
Inventors: 郭明元
Original assignee: Silitek Corp
Current assignee: Silitek Corp
Priority date: 1991-11-21
Filing date: 1992-06-25
Publication date: 1993-07-28
Anticipated expiration: 2002-06-25
Also published as: GB9216281D0; GB2261769A; GB2261769B; DE9201284U1

Abstract

The utility model relates to an improved key structure, comprising a plastic cement key body, a rubber engaging layer and conductive rubber, wherein, the bottom of the plastic cement key body is provided with one or a plurality of grooves, and rubber of the rubber engaging layer can infiltrate into the prearranged grooves of the plastic cement key body by using heat engagement, so that the plastic cement key body and the rubber engage layer can be integrally bonded. The conductive rubber can be attached to the bottom surface of the rubber engaging layer by the key body after the engagement in the manners of printing or hot melting bonding, etc., so that the new structure of the key can be obtained by the combination. When the key is pressed, the conductive rubber can switch on a circuit, and the rubber engaging layer has the functions of elasticity and reset.

Description

Improved key

The utility model is about a kind of Improved key structure, refers to especially a kind ofly be formed by plastic cement and rubber adhesion, is used as contact-making surface with plastic cement, is used as the novel press-key structure of elastomer with rubber, and its shape and not of uniform size can reach the die device of use according to need and changes.

Along with development of science and technology, automation equipment enters each family gradually, therefore common people are also more and more with the chance that contacts by key inputting device, such as computer, communication apparatus, telephone set, Automatic Teller Machine, even password door or the like all is to utilize button and machine to link up automatically, and make machine executable operations person's order, thereby the people's life is inseparable with button, to the requirement of button also more and more high.Not only require attractive in appearance, its sense of touch and motion and sound etc. also require its perfection, therefore the development of button is at a tremendous pace, from initial mechanical type spring involution formula button to recent rubber involution formula button, the variation of its structure is to advance fast, yet present common button, its structure all must install a spring or soft rubber body in the plastic press key bottom surface so that the elastic reaction of plastic press key mat spring or soft rubber body when pushing so that conductive rubber turning circuit and can recover original position, the shortcoming of this kind plastic press key is that plastic press key and spring or soft rubber body are separated, the two easily causes pushing of use going up uncertain because of gap error, and plastic press key spends man-hour with the assembling that spring or soft rubber body are the separate type assembly, improved cost of manufacture simultaneously, become producer's utmost point and waited the problem improved.

For reaching the purpose of improving the problems referred to above, the applicant develops a kind of novel press-key structure, this structure with plastic press key and rubber knitting layer molten be one, the various advantages that not only possesses plastic cement and rubber, more have make simple, fast, can make in a large number, advantages such as a large amount of saving production costs are more coupled hardness with softness because of it, and are more more sturdy and durable than the structure of existing button.

Now in conjunction with the accompanying drawings, the utility model structure and function are described in detail in detail.

Fig. 1 is the outside drawing of the utility model button product

Fig. 2 is the utility model button mould stereogram it ()

Fig. 3 is the utility model button mould stereogram they (two)

Fig. 4 is the side sectional view of the utility model button

Fig. 5 is the push action exploded view of the utility model button

Fig. 6 (A) and 6(B) be the another kind of embodiment push action exploded view of the utility model button

See also Fig. 1 to Fig. 5, the primary structure of the utility model button includes plastic press key 1, rubber knitting layer 2, conductive rubber 3, wherein:

Plastic press key 1 is that a solid plastic cement is made, several grooves 11 and joint close 10 are carved with in its bottom, the center is established a salient point 12 and can be engaged with conductive rubber 3, and its juncture mainly is to utilize mould to be fused, mould is divided into loam cake 20 and lower cover 21, by can clearly finding out among Fig. 2, the heart is established the cuboid 210 of an indent among the mould lower cover 21, cuboid 210 central authorities are provided with several shrinkage pools 211, edge is provided with an oblique chamfering 2110 on the shrinkage pool 211, and the size of shrinkage pool 211 in fact the size with plastic press key 1 is identical, around the lower cover 21 location hole 212 is arranged respectively, and loam cake 20 around with respect to also each tool one pilot pin 203 of the position of location hole 212, engage pilot pin 203 and location hole 212, just can locate loam cake 20 and lower cover 21, make the mould driving fit.And the heart is also established a cuboid 202 that is same as lower cover among the loam cake 20, cuboid 202 is with respect to the position of lower cover 21 shrinkage pools, also be provided with several flanges 201, be placed into 211 li of the shrinkage pools of lower cover 21 when plastic press key 1 after, rubber is placed lower cover 21 cuboids 210, engage loam cake 20 and lower cover 21 and heating, then utilize rubber different with the fusing point of hard plastic cement, the control temperature, so that rubber melts and the hard unlikely fusing of plastic cement, then can fill up in the cuboid 210 after the rubber fusing, also fill up in the default groove of plastic press key 1, utilize default oblique chamfering 2110 in the shrinkage pool 211, connect plastic press key after making rubber cast an oblique angle in advance, utilize the loam cake 20 and the degree of depth of lower cover 21 cuboids to differ again, loam cake 20 engages crack between the generation of back with lower cover 21, form a rubber knitting layer 2, its product as shown in Figure 4 after separating loam cake 20 and lower cover 21, the bottom groove 11 of plastic press key 1 has filled up rubber and has connected rubber knitting layer 2, between plastic press key 1 and rubber knitting layer 2 then because of the made oblique rubber 200 of the oblique chamfering of mould 2110, make plastic press key 1 therefore have elasticity, engage the plastic press key 1 and rubber knitting layer 2 of back, can conductive rubber 3 be printed on the position of relative plastic press key central point 12 by mode of printing, or utilize hot-melt technology with plastic press key, the pre-cast solid of rubber knitting layer, when saving worker and cost, after finishing joint, the plan cross-section of button is shown in Fig. 5 (A).

Conductive rubber 3 because of the height of oblique rubber 200 at usual state contact circuit plate 4 not, when pushing plastic press key 1, shown in Fig. 5 (B), conductive rubber 3 is subjected to external force and the contact circuit plate, make circuit turn-on, when discharging button, then utilize the elastic force of the oblique rubber 200 of rubber knitting layer 2, make plastic press key recover the origin-location.

Therefore, the utility model utilizes special adhesion technology, and hard plastic is merged with soft rubber, has both possessed the elasticity of rubber, the hardness that has also possessed plastic cement, make the button operation sense better, elasticity is better, in addition because keyboard is that whole precasting forms, both there be not assembly, need not assemble, with the minimizing spoilage, also make keyboard more durable when saving worker again.

Fig. 6 (A) and 6(B) be that another of the utility model implemented illustration.Shown in Fig. 6 (A), conductive rubber 8 is because of there being the height of oblique rubber 6, under normal circumstances can't contact circuit plate (9) when depressing plastic press key 5, then just be shown in Fig. 6 (B), conductive rubber 8 is subjected to the external force effect and the contact circuit plate makes circuit turn-on, when bleeding off button, then utilize the elastic force of the oblique rubber 6 of rubber knitting layer 7, make plastic press key recover original position.The groove of the utility model plastic press key 1 and joint close can change its shape on demand as known in the figure, so the change of this shape all belongs to the protection category of the utility model in the structure of not losing original opinion and being formed.

In sum, the utility model really can improve the shortcoming of existing button, and reduces the cost of manufacture of keyboard, is the new construction of a Nover practical in fact.

Claims

1, a kind of Improved key, it comprises plastic press key, rubber knitting layer and conductive rubber is characterized in that:

Described plastic press key is provided with 1 or the solid hard plastic press key of several grooves waiting to fuse into rubber for its bottom;

Described rubber knitting layer for described plastic press key between the soft rubber that has elasticity concurrently that is connected with an oblique rubber, reach

Described conductive rubber is one to be attached to the soft rubber of the tool conductivity under described plastic press key central authorities and the described rubber knitting layer.

2, Improved key as claimed in claim 1 is characterized in that: the soft rubber of described hard plastic and described rubber knitting layer is the fusion all-in-one-piece.