Key module of portable apparatus
A technology for buttons and mobile devices, applied in emergency protection devices, light guides, optics, etc., can solve the problems of poor oil resistance, difficult to use and heat resistance, and achieve the effect of reducing cost, reducing number, and high brightness
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no. 1 example
[0073] figure 1 The configuration of the key module according to the present invention is shown. In the button module of the present invention, fixed-side contacts 7 are provided on the substrate 2 for generating signals generated by operating the buttons. When the operator depresses the key on the key top 6 serving as the key top member, the pressing portion 6a moves downward as the key moves. A dome 4 serving as a movable side contact is provided under the pressing portion 6a, which is pressed down by the pressing portion 6a, thereby being deformed and electrically connected to the fixed side contact 7 while imparting a click feeling.
[0074] Furthermore, the key module has a dome piece 5 serving as a movable side contact piece, which fixes the dome 4 to the base plate 2 and thus covers the base plate 2 and the dome 4 . Furthermore, the light guide plate 1 is provided between the dome sheet 5 and the key top 6 . In this embodiment, the LED module 3 serving as a light so...
example 1
[0084] Next, measurement example 1 of the present embodiment will be described. In this measurement example, the key module according to the present invention was used in a key section of a cell phone to evaluate the click feeling which is an important characteristic of the cell phone. In this measurement, a thermosetting polyurethane elastomer sheet having a thickness of 200 μm, 220 μm or 240 μm and a Shore A hardness of 91 or 97, respectively, was used as the base material 10 . Measurements in the case where no light guide plate was used were also compared with those where polycarbonate and polyester were each used as the base material 10 of the light guide plate. For printing ink, use white UV curing ink A (the main component is 70-90 (inclusive) wt% photopolymerization composition, the pigment is 10-20 (inclusive) wt% titanium dioxide, the remainder is 5 wt% or less of polymerization initiation agent). For the inkjet head 6, the piezoelectric type was used under the cond...
example 2
[0094] Next, measurement example 2 will be described. In this measurement example, a key module according to the present invention was used in a key section of an actual cellular phone, and a keystroke test was performed under the following conditions: the pressing load was 600 g; the rubber hardness at the end of the striking point was 65; and the weighting speed (weighting speed) is 5mm / min. A thermosetting polyurethane elastomer sheet having a thickness of 200 μm and a Shore A hardness of 91 or 97 was used as the base material 10 . For comparison, the measurement without using the light guide plate was also carried out. Use respectively have 15mm and The keystroke part of the diameter of 4mm. The measurement results are shown in Table 2.
[0095] [Table 2]
[0096]
[0097] As shown in Table 2, before and after the keystroke test, for all the test types shown, there was little change in the click feeling, and there was no deterioration of the mechanical character...
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