CN201191820Y

CN201191820Y - Capacitor induction type press-key switch

Info

Publication number: CN201191820Y
Application number: CNU2008200353893U
Authority: CN
Inventors: 陈舜根; 彭明春
Original assignee: CHANGSHU GOTEK OPTRONICS TECHNOLOGY CO LTD
Current assignee: CHANGSHU SHIYING OPTICAL TECHNOLOGY CO., LTD.
Priority date: 2008-04-30
Filing date: 2008-04-30
Publication date: 2009-02-04
Anticipated expiration: 2018-04-30

Abstract

The utility model provides a capacity inducted type key switch, which comprises an electronic circuit board, an LED, an acrylic back light plate and a printing tape, wherein a white semigloss ink layer is sprayed on the top surface of the electronic circuit board, white reflecting patterns are printed on the ink layer, the acrylic back light plate is adhered on the top surface of the electronic back light plate, opaque slots between various key switch positions are arranged on the acrylic back light plate, the LED is arranged on the side of the top surface of the electronic circuit board, gaps are arranged on the acrylic back light plate corresponding to the LED, the LED is clung to the side of the gaps of the acrylic back light plate, the printing tape is adhered on the acrylic back light plate, the printing tape wraps the whole acrylic back light plate and the LED, and key switch function indicating patterns are printed on the printing tape corresponding to a touch-sensitive zone. The problem that back light is not even is solved, light paths are optimized and modified, display brightness of the key switch function indicating patterns is even, the luminous efficacy of the LED is fully utilized, electric energy is saved, and the requirements to materials are lowered.

Description

The capacitor induction type key switch

Technical field

The utility model relates to a kind of capacitor induction type key switch with pattern backlight.

Background technology

Touch-induction-type key switch (abbreviation soft-touch control) is a kind of electronic switch, contactless pressure, nothing machinery contact structure; Finger by detecting the people near or the touch sensible point cause physical change amount (as capacitance, inductance value, resistance value etc.), be converted into the electric switch signal then.Usually the induction type key switch is an electronic circuit board, has on sensed near induction bonding pad (PAD), and another side is an electronic component cloth spare face; Go in group that electronic product (as notebook computer, mobile phone, sound equipment etc.) is preceding will to add indication icon backlight in sensitive surface, directly place led light source; Usually can occur backlight inhomogeneous and influence the problem of induction sensitivity, and a series of problems such as maintenance is inconvenient, and production essence degree of requirement height and packaging efficiency are low.

Summary of the invention

The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of touch-induction-type key switch with pattern backlight is provided.

The purpose of this utility model is achieved through the following technical solutions:

The capacitor induction type key switch, comprise electronic circuit board, LED, the acrylic backlight, print tape, characteristics are: the end face of described electronic circuit board is sprayed with white semigloss oil China ink layer, be printed with the white reflection pattern on the ink lay, make the light stepless action of inciding backlight inside, the acrylic backlight is bonded on the end face of electronic circuit board, have the resistance light groove between each button position on the acrylic backlight, to intercept the interference of each LED light, LED is arranged in the lateral location of electronic circuit plate top surface, be provided with breach corresponding to the LED position on the acrylic backlight, LED is close to acrylic backlight breach side; Paste print tape on the acrylic backlight, print tape wraps up whole acrylic backlight and LED, and the corresponding touch sensible zone position of print tape is printed with the keypress function indicator diagram.

Further, above-mentioned capacitor induction type key switch, described acrylic backlight is the perspex material.

Further, above-mentioned capacitor induction type key switch, described print tape is a plastic material, printed on both sides, corresponding touch sensible place printing indicator diagram, the indicator diagram of printing is that white is translucent, the inner surface printing white reflection ink lay at other positions, play the effect of reflection ray, outer surface process black ink lay plays the effect that intercepts light.

The utility model modern design efficiently solves uneven problem backlight, makes the opticpath improvement that is optimized, and the keypress function indicator diagram shows light evenly, and the luminous efficacy of LED is fully used, and saves energy reduces material requirements.The function indicator diagram of printing can arbitrarily change as requested, reduces the repair rate in the manufacturing of corresponding development and manufacturing cost and product.Structure is very compact, and the assembling permissible accuracy is not high, does not influence switch sensitivity.Design alteration is easy, easily realizes standardized designs, is convenient to large-scale production, and application prospect is good.

Description of drawings

Below in conjunction with accompanying drawing technical solutions of the utility model are described further:

Fig. 1: the utility model blast structural representation;

Fig. 2: the utility model cross section structure schematic diagram;

Fig. 3: the structural representation of print tape;

Fig. 4: the structural representation of acrylic backlight;

Fig. 5: the structural representation of electronic circuit board.

The implication of each Reference numeral among the figure:

The 1-print tape, 2-LED, 3-acrylic backlight, 4-electronic circuit board.

Embodiment

Shown in Fig. 1～2, the induction type key switch is made up of electronic circuit board 4 (PCB), led light source 2, acrylic backlight 3, print tape 1, the end face of electronic circuit board 4 is sprayed with white semigloss oil China ink layer, be printed with the white reflection pattern on the ink lay, acrylic backlight 3 is bonded on the end face of electronic circuit board 4, have the resistance light groove between each button position on the acrylic backlight 3, LED 2 is arranged in the lateral location of electronic circuit board 4 end faces, be provided with breach corresponding to the LED position on the acrylic backlight 3, LED 2 is close to acrylic backlight breach side; Paste print tape 1 on the acrylic backlight 3, print tape 1 whole acrylic backlight 3 of parcel and LED 2, print tape 1 corresponding touch sensible zone position is printed with the keypress function indicator diagram.

During specific design, as Fig. 5, PCB 4 end faces are induction PAD layer, the bottom surface is components and parts cloth spare district, the end face surface is the white semigloss oil China ink of spray all, printing white reflection pattern on ink lay, be positioned at the position of touch sensible, Christmas tree pattern is made up of the disk of different sizes, near LED place disk minimum, far away more from LED, disk is big more, because from the weakening gradually apart from light of LED, the size of the disk of corresponding Christmas tree pattern increases successively, can compensatory reflex light because of the increase of distance decays, play that light is acted on uniformly.LED 2 is arranged in PCB 4 end face side positions, acrylic backlight 3 is combined on the end face of PCB 4 by the mode of viscose glue, as Fig. 4, corresponding LED 2 position gaps on the acrylic backlight 3, assembling back LED is close to acrylic backlight breach side, light is injected from the side, several secondary reflections of the printing Christmas tree pattern of process acrylic backlight inside and PCB, make light even, a uniform environment backlight is provided for the indicator diagram of printing, show out pattern on the printed sheet especially, and make indicator diagram brightness everywhere even.In addition, in acrylic backlight 3, dead slot is opened in corresponding each both sides, button icon position, be used for blocking light, make LED sends on each key position the light can the phase mutual interference, make independently separately, can change the luminous spectrum designing requirement scope of each LED according to the product function needs.Paste the print tape 1 of band keypress function indicator diagram on the acrylic backlight 3, the pattern of print tape 1 can change arbitrarily as required, print tape 1 is a plastic material, as Fig. 3, the two-sided glue that covers of print tape 1 printed on both sides, indicator diagram are white translucent printing, inner face printing white reflection printing ink, play the effect of reflection LED light, with the loss of compensation light in inside, the outside is a black.The whole acrylic backlight 3 of print tape 1 parcel, the light that LED sends shows except indicator diagram, other not exposure of place.

During concrete the application, efficiently solve uneven problem backlight, make the opticpath improvement that is optimized, the keypress function indicator diagram shows light evenly, and the luminous efficacy of LED is fully used, saves energy, reduction material requirements.The function indicator diagram of printing can arbitrarily change as requested, reduces the repair rate in the manufacturing of corresponding development and manufacturing cost and product.Structure is compact, and the assembling permissible accuracy is not high, does not influence switch sensitivity; Design alteration is easy, easily realizes standardized designs, is convenient to large-scale production, and economic benefit is very considerable.

What need understand is: though the foregoing description is to the utility model detailed explanation of contrasting; but these explanations are just illustrative to the utility model; rather than to restriction of the present utility model; any innovation and creation that do not exceed in the utility model connotation all fall in the protection range of the present utility model.

Claims

1. capacitor induction type key switch, comprise electronic circuit board, LED, acrylic backlight, print tape, it is characterized in that: the end face of described electronic circuit board is sprayed with white semigloss oil China ink layer, be printed with the white reflection pattern on the ink lay, the acrylic backlight is bonded on the end face of electronic circuit board, have the resistance light groove between each button position on the acrylic backlight, LED is arranged in the lateral location of electronic circuit plate top surface, be provided with breach corresponding to the LED position on the acrylic backlight, LED is close to acrylic backlight breach side; Paste print tape on the acrylic backlight, print tape wraps up whole acrylic backlight and LED, and the corresponding touch sensible zone position of print tape is printed with the keypress function indicator diagram.

2. capacitor induction type key switch according to claim 1 is characterized in that: described acrylic backlight is the perspex material.

3. capacitor induction type key switch according to claim 1 is characterized in that: the inner surface of described print tape is printed with the white reflection ink lay.