CN2588445Y

CN2588445Y - Keyboard device

Info

Publication number: CN2588445Y
Application number: CN 02287319
Authority: CN
Inventors: 林志聪
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-11-22
Filing date: 2002-11-22
Publication date: 2003-11-26
Anticipated expiration: 2012-11-22

Abstract

The utility model relates to a keyboard device comprising a circuit unit and a plurality of key units arranged on the circuit unit; the circuit unit is provided with a first surface and a second surface which are opposite; the circuit unit comprises a circuit plate and a key switch base plate which are mutually attached; the key switch base plate is arranged at the position of the first surface; the circuit plate is arranged on the position of the second surface; the circuit plate is provided with a plurality of groups of electric property contact points; the key switch base plate is provided with a plurality of through holes corresponding to each electric property contact point; each key unit is provided with an elastic body which can elastically reset to correspondingly trigger the electric property contact points, and a key cap; the elastic body is provided with a top part connected with the key cap, and an elastic part which is opposite to the top part; the elastic body is correspondingly arranged in the through hole; the elastic part is contacted on the circuit plate; the key cap is convexly arranged on the first surface of the circuit unit. The utility model has effect of enhancing comfortable degree for users pressing keys without increasing thickness of a keyboard.

Description

Key board unit

[technical field]

The utility model relates to a kind of key board unit.

[background technology]

Fig. 1 illustrates a kind of structure of conventional keyboard device.This key board unit comprises a circuit unit 3 and most push-button unit 4, and because of each push-button unit 4 all has identical construction, so figure goes up only with 4 expressions of single push-button unit.

Circuit unit 3 has a wiring board 31 and a keyswitch substrate 32 of mutual applying usually, and can be soft or rigid circuit board on the wiring board 31, make wiring board 31 be provided with the electrical contact (figure do not show) of most groups in order to produce corresponding keying signal, whole circuit unit 3 is formed with a upper surface, make 31 positions of wiring board at upper surface, most 4 of push-button units are positioned at wiring board 31 tops, each push-button unit 4 has an elastic body 41, the keycap 42 that push for the user at one top that is connected elastic body 41, and in order to support and the fork-shaped bracing frame 43 of location keycap 42 above circuit unit 3, elastic body 41 is made for the flexible elastomeric material of tool, its bottom forms a hollow nest shape and the elastic 411 of elastically deformable, place, inboard top near elastic 411 then has a conductive part that protrudes out 412 downwards, when the user pushes keycap 42 downwards the time, can force the elastic 411 of elastic body 41 to produce distortion, and then conductive part 412 is moved down with corresponding conductive junction point on the contact wiring board 31, make conductive junction point by conductive part 412 and conducting, and then produce the keying signal of a correspondence.

Yet as Fig. 1, Fig. 2 and shown in Figure 3, with this kind keyboard structure, for the thickness that makes integral keyboard dwindles as far as possible towards the design of thin typeization, the distance that keycap 42 and circuit unit are 3 has the restriction in the design usually, therefore the height in the middle of the electrical contact of the conductive part 412 of elastic body 41 and wiring board 31 is quite limited especially, when pushing keycap 42, the user oppresses elastic body 411 distortion downwards, when making conductive part 412 touch electrical contact on the wiring board 31, limitation because of the space, often make the elastic 411 of elastic body 41 produce sizable deflection, so that the elastic-restoring force that elastic 411 is produced will increase accordingly.

Cooperate the application of force test curve figure of Fig. 7 to see that the horizontal ordinate D in Fig. 7 represents stroke simultaneously, unit is mm, and ordinate F represents pressing force, and unit is a gram; If keycap 42 and 3 vertical ranges of circuit unit are represented with I, and the conductive part 412 of elastic body 41 is represented with II with the vertical range of wiring board 31, then stroke that moves behind keycap 42 pressurizeds and the required relation of pushing strength of user can make as scheming to go up the solid line curve just like skewed N font partly and represent, wherein, the easy degree of user when experiencing button is to depend on after keycap 42 moves the distance of II, the user must be applied to strength on the keycap 42, meaning is the size as curve pairing strength 91 of along slope coordinate when lateral coordinates is II of figure, and this strength is bigger, represent the required strength of pushing of user also bigger, relatively will reduce easness and the comfort level of user when pushing.But with regard to above-mentioned key board unit, because keycap 42 and circuit unit 3 middle limited spaces, cause under the situation of elastic 411 excessive compression of elastic body 41, the required strength of user's button is bigger usually, so often be difficult to take into account on the comfort level of keyboard slimming and use.

[utility model content]

The purpose of this utility model is to provide a kind of key board unit, and it has the effect that improves user's pressing keys comfort level under the prerequisite that does not increase keyboard thickness.

In order to achieve the above object, the utility model provides a kind of key board unit, comprises a circuit unit and most push-button unit that is arranged on this circuit unit, it is characterized in that:

This circuit unit is provided with opposite one first and one second, and this circuit unit includes a wiring board and a keyswitch substrate of mutual applying, this keyswitch substrate is arranged on this first and locates, this wiring board then is arranged on this second and locates, this wiring board has most group electrical contacts, and this keyswitch substrate then is provided with most to perforation that should each electrical contact position;

This each push-button unit has a pair of an elastic body and a keycap that should electrical contact, this elastic body has a top and an elastic opposite with this top that connects with this keycap, this elastic body is that corresponding status is in this perforation, make this elastic contact at this wiring board, this keycap then protrudes on first of this circuit unit.Stressed and move at keycap to the circuit unit direction, but the elastic deformation of elastic borrowed and the electrical contact of the corresponding triggering in elastic reset ground wiring board.

In sum, advantage of the present utility model and effect are: it can reduce the required strength of user's button under the condition that does not change the integral keyboard device thickness, makes the comfort level of user on using significantly improve.

[description of drawings]

Below by preferred embodiment and accompanying drawing key board unit of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is a kind of part organigram of conventional keyboard device, and the position relation a when circuit unit and a push-button unit are not stressed is described;

But Fig. 2 is the synoptic diagram of Fig. 1 key board unit after stressed, the elastic body extrusion of push-button unit is described the kenel during trigger signals not as yet;

Fig. 3 is the synoptic diagram of Fig. 1 key board unit after stressed, the kenel when the elastic body extrusion of push-button unit and trigger signals are described;

Fig. 4 is the preferred embodiment part organigram of the utility model key board unit, and the position relation when circuit unit and push-button unit are not stressed is described;

But Fig. 5 is the synoptic diagram of this preferred embodiment after stressed, the elastic body extrusion of push-button unit is described the kenel during trigger signals not as yet;

Fig. 6 is the synoptic diagram of this preferred embodiment after stressed, the kenel when the elastic body extrusion of push-button unit and trigger signals are described;

Fig. 7 is a keycap stroke of push-button unit and the graph of relation of the required application of force size of user, in order to compare the otherness between conventional keyboard device and the utility model simultaneously.

[embodiment]

Consult Fig. 4, the similar conventional keyboard device of a preferred embodiment of key board unit of the present utility model also is to include a circuit unit 1 and most push-button unit 2, and because the structure of each push-button unit 2 is all identical, so figure goes up only with 2 expressions of one key unit.Wherein:

Circuit unit 1 be formed with one up first 101 and one below second 102, and as the circuit unit of conventional keyboard device, it also includes a wiring board 11 and a keyswitch substrate 12 of mutual applying, but the places different with conventional construction exist, 12 first 101 places above circuit unit 1 of keyswitch substrate, the then corresponding status of wiring board 11 below second 102 place, wiring board 11 has the electrical contact (figure do not show) of most groups in order to produce corresponding signal, and keyswitch substrate 12 because of the position above wiring board 11, so keyswitch substrate 12 is provided with the perforation 121 that majority runs through keyswitch substrate 12 in the position of corresponding these electrical contacts.

Each push-button unit 2 also has an elastic body 21, a keycap 22 and a bracing frame 23 in the same manner with conventional construction, make keycap 22 be positioned at a top 211 of elastic body 21 tops, one elastic 212 of elastic body 21 belows then is nest shape, and is provided with a conductive part that protrudes out 213 downwards in elastic 212 inboards of nest shape.

During installation, the elastic 212 of the elastic body 21 of each push-button unit 2 is distinguished corresponding status in each perforation 121, and elastic 212 bottom surfaces of elastic body 21 are placed on the wiring board 11, and keycap 22 then can protrude first 101 top of circuit unit 1.

As Fig. 4, Fig. 5 and shown in Figure 6, push keycap 22 as the user and make keycap 22 stressed and then when circuit unit 1 direction moves, but the elastic 212 by elastic body 21 produces elastic deformation and the corresponding electrical contact that triggers wiring board 11 in elastic reset ground, and produces the keying signal of a correspondence simultaneously.

Refer again to Fig. 7 simultaneously, the difference of the utility model and conventional keyboard device maximum, be because the wiring board 11 of circuit unit 1 is the below that is fitted in keyswitch substrate 12, and the electrical contact position of corresponding line plate 11 then forms perforation 121 on the keyswitch substrate 12, so as the I that vertical range keeps as conventional construction is identical of keycap 22 and circuit unit 1 highly the time, the conductive part 213 of elastic body 21 will increase the height of the III that generally equates with keyswitch substrate 12 thickness because of 121 spaces that constituted of boring a hole with the vertical range of 11 of wiring boards than the height of original II, make the vertical range of 11 of conductive part 213 and wiring boards form the height of II+III, in other words, the elastic 212 deformable spaces of elastic body 21 relatively increase, make when conductive part 213 contact wiring boards 11, the deflection of elastic 212 will not have the situation of the general excessive compression of conventional construction, so be reflected on the represented curve of the dotted line of Fig. 7, the stroke of keycap 22 on the horizontal ordinate II+III the big young pathbreaker of strength 92 of corresponding ordinate than the represented conventional construction keycap stroke of solid line during at II the size of pairing strength 91 come lowly, so, can be under the condition that does not change the integral keyboard device thickness, reduce the required strength of user's button, make the comfort level of user on using significantly improve.

Claims

1, a kind of key board unit comprises a circuit unit and most push-button unit that is arranged on this circuit unit, it is characterized in that:

This each push-button unit has a pair of an elastic body and a keycap that should electrical contact, this elastic body has a top and an elastic opposite with this top that connects with this keycap, this elastic body is that correspondence is arranged in this perforation, this elastic is contacted with this wiring board, and this keycap then protrudes from first of this circuit unit.