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Key sheet

一种键板、键头的技术，应用在层、电气元件、紧急外壳等方向，能够解决不能输入、位置偏移、底板104整体伸长变形等问题，达到可靠输入操作、抑制变形、提高刚性的效果

Inactive Publication Date: 2005-02-02
POLYMATECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And generally, base plate 104 is made of soft silicone rubber, so when using mobile phone 101, for example, as Figure 21 upright like that, or as Figure 22 If it falls down like that, it will not be able to withstand the weight of the key top 103, and the bottom plate 104 will sometimes be elongated and deformed as a whole.
As a result, the position of the key 104a of the bottom plate 104 and the contact switch 101e provided on the circuit board 101d composed of a metal butterfly spring and a contact circuit are shifted, and even if the key top 103 is pressed, an operation failure may not be possible.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 (shown in Figure 1 to Figure 5 ):

[0045] figure 1 An external view showing the back surface of the key sheet 11 according to the first embodiment. in addition, figure 2 , image 3 Respectively figure 1 The II-II line profile, figure 1 Sectional view of line III-III. As shown in these figures, the key sheet 11 of this embodiment is constituted by a base plate 12 and key heads 13 bonded to the base plate 12 . The bottom plate 12 is provided with a hard resin plate 14 of a rounded rectangular one-piece plate having a rectangular tongue portion on the upper portion as a reinforcing member. In the hard resin plate 14, rectangular through-holes 15 are formed in portions where the key tops 13 are provided via grid-like ribs 14a. The through hole 15 is closed by a seat portion 16 made of a rubber-like elastic body. A cylindrical key 17 protruding downward is formed on the bottom surface of the pedestal portion 16 , and the key top 13 is attached t...

Embodiment 2

[0058] Example 2 [shown in Image 6 ]

[0059] exist Image 6A sectional view of the key sheet 21 according to Embodiment 2 is shown. The key plate 21 is integrally formed with the hard resin plate 14 of the bottom plate 22, and a reinforcing outer frame 23 made of silicone rubber or thermoplastic elastomer as a reinforcing member and a pressure-welding receiving portion is integrally formed. In this way, by forming the reinforcing outer frame 23 covering the outer edge of the hard resin plate 14, the overall rigidity of the bottom plate 21 is further improved compared to the first embodiment. In addition, the reinforced outer frame 23 made of silicone rubber or thermoplastic elastomer is held by pressure welding between the opening edge portion of the operation opening 101b in the back surface 101c of the casing 101a of the mobile phone 101 and the circuit board 101d built in the casing 101a. When , the shape followability with respect to the surface to which pressure we...

Embodiment 3

[0061] Embodiment 3 [shown in Figure 7 ]

[0062] exist Figure 7 A cross-sectional view of the key sheet 31 according to Embodiment 3 is shown. In the bottom plate 32 of the key plate 31, it is characterized in that the front and back of the rib portion 14a of the hard resin plate 14 as a frame-shaped support portion that separates the through holes 15 from each other are integrally formed with the pedestal portion 16. A reinforcement layer 33 as a reinforcement member made of silicone rubber or thermoplastic elastomer. The reinforcing layer 33 protects the thin and thin ribs 14a from damage or cracks, and improves the rigidity. Compared with Embodiment 1, the overall rigidity of the bottom plate 32 is improved, and the deformation of the key plate 31 can be more reliably suppressed.

[0063] In this embodiment, since the reinforcement layer 33 surrounds the rib portion 14 a, the reinforcement layer 33 bulges toward the key top 13 side from the top of the pedestal porti...

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PUM

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Abstract

Provided is a key sheet in which the thickness of a base sheet can be made thinner in the key sheet provided with a key top which is exposed from an operating opening without any partition formed on a box of a machinery and the base sheet to which the key top is fixed.A seat part 16 to which the key top 13 is stuck, and a frame support 14a supporting the seat part 16 to be movable, are provided in the base sheet 12. A roll off part 13a evading pressurized contact with the frame support 14a in a press operation is formed on an outer edge side of the key top 13 bottom facing the frame supporting part 14a. Therefore, even when the seat part 16 is made thin, the key top 13 is not caught in the frame support 14a and pressing operation can be carried out on the key top 13.

Description

technical field [0001] The present invention relates to a kind of key board used for the button switch of the operation part of various apparatuses such as mobile phone, PDA, car navigation device, car audio device, especially relates to the shell that is suitable for making a plurality of key heads from no spacer The key board used for exposing the operation opening of the body, the spacer separates the plurality of key heads exposed from the instrument housing from each other. Background technique [0002] E.g Figure 18 As shown in the mobile phone 101, it is known that a plurality of key heads 103 of the keypad 102 are densely opened from the operation opening 101b formed in the casing 101a in accordance with the miniaturization or design requirements of the operation part. Exposed push button switch. The key board 102 with this key top 103, such as Figure 19 As shown, a plurality of 17 key heads 103 in total are bonded to a bottom plate 104 made of silicone rubber. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H13/712H01H13/14H01H13/702
CPCH01H2209/01H01H2209/006H01H13/702H01H2223/0345H01H2229/048H01H2227/036
Inventor 西村武
Owner POLYMATECH CO LTD
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