CN2315652Y

CN2315652Y - Key

Info

Publication number: CN2315652Y
Application number: CN 97229597
Authority: CN
Inventors: 赵世宏
Original assignee: Acer Computer Co Ltd
Current assignee: BenQ Corp
Priority date: 1997-12-23
Filing date: 1997-12-23
Publication date: 1999-04-21
Anticipated expiration: 2007-12-23

Abstract

The utility model relates to a key which comprises a seat body, a key cap and an elastic body actuator, wherein, the seat body is provided with an integrally formed guide seat of the key cap, and at least two conduits are arranged at the adjacent areas of the guide seat of the key cap; the key cap is provided with a cap body and two downwards extending flexible clamping hooks, the bottom surface of the cap body is downwards extended with a key post, the two flexible clamping hooks are separately corresponding to the two conduits and are arranged in the two conduits, and the key post is arranged in the guide seat of the key cap; the elastic body actuator is provided with a dome part and an integrally formed rubber membrane, and the dome part which supports the key post is deformed with the movement of the key. Each flexible clamping hook is provided with a clamping hook part which is downwards extended with a post body. When the key is stressed to move downwards, the post body first impacts the rubber membrane in order to reduce noise.

Description

Button

The utility model relates to a kind of keyboard.

Having a kind of in the existing keyboard structure is to adopt rubber dome body (Rubber Dome) to make actuator (actuator), for soft (film) circuit (membrane circuit) on inductive switch (switch) is contacted, reach the purpose of actuating switch.

In order to allow the user that comfortable buffering sensation is arranged when the pressing keys, and send excessive strike note when avoiding keycap to press down touching keyboard guide bracket end face; Having now with the rubber dome body is in the key structure of actuator, and when generally all design made keycap be depressed into minimum point, keycap can not clash into the end face of keycap guide bracket, is directly to support keycap by the rubber dome body on the contrary.But this structure is after long-term the use, because each keycap is when pressing down, the rubber dome body all can be subjected to excessive extrusion, as shown in Figure 6, and structure is damaged, and then has reduced the useful life of keyboard.

The purpose of this utility model is to provide a kind of button, and the function of noise, the rubber dome body can avoid being subjected to excessive extrusion, thereby reaches long useful life when pressing down except reaching comfortable and lowering keycap.

The purpose of this utility model is achieved in that promptly provides a kind of button, and it comprises: a pedestal has the keycap guide bracket that an one is shaped, and is provided with two conduits in the adjacent domain of described keycap guide bracket; One keycap, have a cap body and two flexible grabs, the bottom surface of described cap body is extended with a key post downwards, described two flexible grabs are formed by the extension downwards of described cap side edge, and it is corresponding with described two conduits respectively and place conduit, described key post places described keycap guide bracket, and described keycap can be done relative moving up and down with pedestal; One actuator has an Elastic Circular top and an one-body molded elastic film, and described elastomeric dome portion supports described key post and moving up and down and be out of shape with described keycap; Described flexible grab has a pothook, and described pothook is extended with a cylinder downwards, and when described keycap is stressed when moving downward, described cylinder is connected to described elastic film in advance and prevents that described keycap inner surface from clashing into the end face of described keycap guide bracket.

The advantage of the utility model device is, can reduce the noise that keycap presses down and produced when rebounding.

Below in conjunction with accompanying drawing, embodiment of the present utility model is described, wherein:

Fig. 1 is the three-dimensional exploded view of keycap of the present utility model, pedestal;

Fig. 2 A is along the combination section of hatching 2-2 among Fig. 1;

Fig. 2 B is the pressed state figure of button shown in Fig. 2 A;

Fig. 3 A is the profile of another embodiment of the present utility model;

Fig. 3 B is the pressed state figure of button shown in Fig. 3 A;

Fig. 4 A is the profile of the 3rd embodiment of the present utility model;

Fig. 4 B is the pressed state figure of button shown in Fig. 4 A;

Fig. 4 C is the partial enlarged drawing of Fig. 4 A;

Fig. 5 A is the profile of the 4th embodiment of the present utility model;

Fig. 5 B is the pressed state figure of button shown in Fig. 5 A;

Fig. 5 C is the partial enlarged drawing of Fig. 5 A;

Fig. 6 is the state diagram of existing button excessive compression.

As shown in Figure 1, the utility model keyboard comprises a keycap (keytop) 11, a pedestal (housing) 13, a rubber dome body (rubber dome) 15, one switching layer 18 and a substrate 19.Comprise 131 and two conduits of keycap guide bracket (guide) (slot) 132 on the pedestal 13.Keycap 11 mainly comprises the key post (plunger) 112 that a rectangle lid (cap) 111, bottom surface extend downwards and is positioned at lid 111 two-phase diagonal positions and the flexible grabs (book) 113 that extend along lid 111 downwards.For a keyboard, pedestal 13 comprises a plurality of keycap guide brackets 131, a plurality of rubber dome body 15, and these a plurality of rubber dome bodies 15 are and a rubber membrane (elasticsheet member) 17 integrally formed forming.During assembling, key post 112 is inserted in the guide bracket 131, simultaneously two flexible grabs 113 are inserted respectively in the corresponding conduit 132, promptly finish assembling.

What deserves to be explained is that the grab part of flexible grab 113 is extended with one section post groove 113A downwards, its purpose is given narration after holding again.

After being depicted as button assembling and finishing as Fig. 2 A along the profile of hatching 2-2.When the button shown in Fig. 2 A stressed when downward, state shown in Fig. 2 B, because the utility model extends one section post groove 113A downwards in flexible grab 113, therefore cylinder 113A end is pressed onto the rubber membrane 17 of rubber dome body 15 sides earlier before rubber dome body 15 is not as yet by undue extruding, thereby avoids rubber dome body 15 too to be pushed.In addition, also because of the existence of cylinder 113A, when making keycap 11 stressed moving downward, this cylinder 113A can be connected to this elastic film 17 earlier and clash into the end face 131A of this keycap guide bracket 131 to prevent this keycap inner surface 11A, so avoid the generation of impact noise.

In order further to reduce noise, in second embodiment of the present utility model, rubber membrane 17 is provided with hollow salient point 15A in the corresponding cylinder 113A of the side place of rubber dome body 15; When this rubber membrane 17 with after substrate 19 combines, this hollow salient point 15A can be in conjunction with constituting air bag, as shown in Figure 3A with substrate 19.When this button is pressed, the state shown in Fig. 3 B, cylinder 113A compressing salient point 15A, because the air bag effect, so the noise of button operation can further reduce.

The 3rd embodiment of the present utility model, shown in Fig. 4 A, rubber membrane 17 is provided with upwardly extending rubber extension 15B, and this rubber extension 15B makes an appointment with corresponding with the position of grab 113 in set position.When this button is pressed, shown in Fig. 4 B.And when button was sprung back to not pressed state by the state of Fig. 4 B, the grab tip strikes on the grab 113 was not but directly impacted pedestal 13 inside in rubber extension 15B, thereby the noise when reducing button and rebounding.But because of the factor of mould can form breach shown in, the influence that makes the below circuit be subject to seep water.If the effect of increase keyboard waterproof, then replacement scheme places shown in Fig. 2 A on the rubber membrane 17 for the film stack that another layer had a rubber extension 15B, can reach effect identical shown in Fig. 4 A and have waterproof effect concurrently.

In Fig. 4 C, the lateral margin 134 of the pedestal 13 at conduit place becomes to trim state with the lateral margin on extension 15B top, therefore, grab 113 is inserted in the installation process of conduit, grab 113 may abut to extension 15B top, and causes both mutual assembling positions incorrect.

Therefore, the lateral margin 134 of the pedestal 13 at conduit of the present utility model place can design shown in Fig. 5 C, rubber extension 15B top is surrounded in the little space that the lateral margin 134 of pedestal 13 constitutes, and when so assembling grab 113, grab 113 just can not abut to the top of rubber extension 15B.And simultaneously, grab tip on the grab 113 is provided with upwardly extending projection 115, make the grab tip strikes on the grab 113 but directly not impact the lateral margin 134 of the pedestal 13 at conduit place in rubber extension 15B top, thereby the noise when reducing button and rebounding.

Claims

1. button is characterized in that it comprises: a pedestal has the keycap guide bracket that an one is shaped, and is provided with two conduits in the adjacent domain of described keycap guide bracket; One keycap, have a cap body and two flexible grabs, the bottom surface of described cap body is extended with a key post downwards, described two flexible grabs are formed by the extension downwards of described cap side edge, and it is corresponding with described two conduits respectively and place conduit, described key post places described keycap guide bracket, and described keycap can be done relative moving up and down with pedestal; One actuator has an Elastic Circular top and an one-body molded elastic film, and described elastomeric dome portion supports described key post and moving up and down and be out of shape with described keycap; Described flexible grab has a pothook, and described pothook is extended with a cylinder downwards, and when described keycap is stressed when moving downward, described cylinder is connected to described elastic film in advance and prevents that described keycap inner surface from clashing into the end face of described keycap guide bracket.

2. button as claimed in claim 1 is characterized in that, the position that described elastic film is hit further is provided with the hollow salient point of a correspondence and absorbs impulsive force.

3. button as claimed in claim 1 is characterized in that, the corresponding described flexible grab of described elastic film place further is provided with upwardly extending rubber extension, cushions the impact of described grab when described button rebounds.

4. button as claimed in claim 1 is characterized in that, described elastomer is the rubber material.

5. button as claimed in claim 2 is characterized in that, described hollow salient point combines with substrate and constitutes air bag.

6. button as claimed in claim 3 is characterized in that, described rubber extension is surrounded in the space that lateral margin constituted of described conduit, abuts to the top of described rubber extension to prevent described grab in assembling process.