CN2622830Y

CN2622830Y - Keys

Info

Publication number: CN2622830Y
Application number: CN 03226266
Authority: CN
Inventors: 刘剑; 印爱军
Original assignee: Shenzhen Xinpin Industrial Co ltd
Current assignee: Shenzhen Xinpin Industrial Co ltd
Priority date: 2003-05-14
Filing date: 2003-05-14
Publication date: 2004-06-30
Anticipated expiration: 2013-05-14

Abstract

The utility model discloses a key comprising a silastic article 2 with a base heave 21, TPU membrane 1 positioned on the silastic article 2 and interface agent 3 between the silastic article 2 and the TPU membrane 1, wherein, TPU is Thermoplastic urethanes, that is an abbreviation of thermoplastic polyurethane. With the TPU property, the utility model can produce various key products with different hardness, wear resistance and high intensity.

Description

A kind of key device

Technical field

The utility model relates to electronics device accessory, and it is contact switch device controlled to be specifically related to a kind of button.

Background technology

Traditional button is generally metallic bond, discovery along with various new materials, at present the button on the electronic device generally is divided into totally four kinds of organic silicon rubber class, polyester film class, polycarbonate-based and P+R applying classes, wherein: (one) organic silicon rubber class: body formed with the silicon rubber mould repoussage, it makes simple, quick, but cause the information such as character on the button only on keytop, to finish thus, easily be worn, and the abrasion performance of silicon rubber self, physical strength are all not enough, and useful life is short; (2) polyester film class: promptly common thin film switch, its manufacture method are to add that on film multilayer build-ups such as character, circuit form, and product thickness is little, and fabrication cycle is short, but film is easily crisp and the product feel is stiff, only are fit to make flat switch.(3) polycarbonate-based: as to be applied on the mobile phone more, its manufacture method is after using polycarbonate membrane hot-forming, injects the contact of Merlon in mould, and the button of hard can be provided, make the bigger button product of thickness, but Boardy Feeling, shortcoming that film is easily crisp exist still.(4) P+R applying class: promptly plastic cement key and silicon rubber spare fit together and make finished product.Because the variation of plastic cement key, the button product appearance is abundant, have the advantage of silicon rubber spare concurrently, but still have the shortcoming of silicon rubber intensity difference, and the factor of technology of fitting and the restriction of intensity one-tenth.

The utility model content

The technical problems to be solved in the utility model is, how a kind of key device is provided, polyester film class and polycarbonate-based button Boardy Feeling, shortcoming that film is easily crisp can be overcome, the shortcoming of organic silicon rubber class and P+R applying class button silicon rubber intensity difference can be overcome simultaneously.

The above-mentioned technical problem of the utility model solves like this, constructs a kind of key device, comprises the silicon rubber spare of being with bottom protrusion, it is characterized in that, also comprises the interfacial agents between the TPU film on the described silicon rubber spare and described silicon rubber spare and TPU film; The hardness of described TPU film (1) can be the arbitrary value in the TPU material softer hardness range.

Device according to the utility model provides is characterized in that, described TPU film can comprise or not comprise the printed layers of having a common boundary with described interfacial agents that is printed thereon as required.

Device according to the utility model provides is characterized in that, described printed layers comprises one or more layers, can make multiple difformity as required.

Device according to the utility model provides is characterized in that, described interfacial agents is attached on the described TPU film with or without printed layers.

Device according to the utility model provides is characterized in that, described TPU film, silicon rubber spare and interfacial agents are an integral body, and be one-body molded by hot pressing.

Device according to the utility model provides is characterized in that, described bottom protrusion can comprise as required or not comprise, make or not make the conductiving point that is positioned at the bottom surface.

Device according to the utility model provides is characterized in that, can also comprise the various plastic parts that is bonded on the described TPU film as required.

Device according to the utility model provides is characterized in that, when the button height is big, the TPU film preforming of band interfacial agents and band printed layers need be handled, and after the preforming, together places mould with silicon rubber spare more separately, and is hot-forming.

The key device that the utility model provides, the pliability that has made full use of the TPU film is good, the intensity height, abrasion performance is good, and the characteristics that hardness is adjustable can be made into different, the abrasion performance of hardness, the button product that intensity is high; And because printed layers information such as character are difficult for being worn between TPU film and silicon rubber spare; The different choice of TPU film, printed layers, silicon rubber spare be can also pass through, height, the different button product of thickness made; Further also can be on the TPU film bonding various plastic parts in addition, make more extensively abundant button product.

Description of drawings

Fig. 1 is the structural representation of the key device that provides of the utility model.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.In the utility model, TPU is that Thermoplastic urethanes is the abbreviation of thermoplastic polyurethane, this material possesses that mechanical strength is good, abrasion performance, oil resistance is splendid, low-temperature characteristics is outstanding characteristic, also have soft durometer scope widely simultaneously, generally can be from Shore A70 to Shore D72.According to the key device that the utility model provides, its structure comprises TPU film 1, silicon rubber body 2 and the interfacial agents between them 3 as shown in Figure 1.Silicon rubber body 2 has bottom protrusion 21, and its bottom surface is provided with conductiving point 22 and is used to touch circuit; TPU film 1 is printed with printed layers 11 on inner surface, this printed layers 11 can be multi-sheet printed and be made multiple shape.When button height 4 was little, TPU film 1, silicon rubber spare 2 and interfacial agents 3 can once be unified hot-forming; Otherwise, the TPU film 1 of band interfacial agents 3 and band printed layers 11 need be carried out preforming and handle, will together place mould with silicon rubber spare 2 through TPU film 1 after the forming processes and interfacial agents 3 again, together carry out hot-forming.

Claims

1, a kind of key device comprises it is characterized in that the silicon rubber spare (2) of band bottom protrusion (21), also comprises the TPU film (1) that is positioned on the described silicon rubber spare (2) and the interfacial agents (3) between described silicon rubber spare (2) and the TPU film (1).

According to the described device of claim 1, it is characterized in that 2, described TPU film (1) comprises the printed layers (11) of having a common boundary with described interfacial agents (3) that is printed thereon.

According to the described device of claim 2, it is characterized in that 3, described printed layers (11) can be one or more layers.

According to the described device of claim 1, it is characterized in that 4, described interfacial agents (3) is attached on the described TPU film (1).

According to the described device of claim 1, it is characterized in that 5, described TPU film (1), described silicon rubber spare (2) and described interfacial agents (3) are combined as a whole.

According to the described device of claim 1, it is characterized in that 6, described bottom protrusion (21) can comprise the conductiving point (22) that is positioned at the bottom surface.

7, according to the described device of claim 1, it is characterized in that, can also comprise the plastic parts that is bonded on the described TPU film (1).