JPH0730426U - Knob lighting device for switches, etc. - Google Patents

Abstract

(57) [Abstract] [Purpose] A knob is provided to incorporate a light-emitting element for each display section in the knob, to provide a conductive resin pattern layer for supplying power to the light-emitting element, and to make the knob detachable from the case. By providing a stopper at the lower end of the light-shielding resin layer that forms the main body, you can easily replace the light source of the knob lighting device such as a switch with a one-touch type by replacing only the knob and eliminate uneven illumination of the knob display. To do. In a knob lighting device such as a switch, light emitting elements 23 and 24 mounted on support plates 25 and 26 are sealed with light shielding resin lens portions 27 and 28, and the lens portions are covered.
In addition, the light blocking resin layer 29 having stoppers 45, 45 at the lower end and forming the main body of the knob and the first and second conductive pattern layers 30, 31, 32.33 are integrally formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a knob lighting device for a switch or the like.

[0002]

[Prior art]

 Conventionally, there is an illumination display switch having a structure shown in FIGS. 5 and 6, for example. In the prior art shown in FIG. 5, one lamp 4 and a light-transmitting resin light guide 5 for light distribution are arranged on a circuit board 3 to illuminate the display portions 2 of a plurality of knobs 1. Each of the knobs 1 is inserted into and retractable from inside a plurality of openings 6a provided in the case 6. The knob 1 is biased by the switch portion 9 of the rubber contact 8, and the protrusion 7 provided at the lower end of the knob 1 is locked to the lower surface peripheral edge of the opening 6 a of the case 6. When the knob 1 is pressed, the illuminated display switch is turned on by contacting the movable contact 10 printed on the inside of the switch portion 9 of the rubber contact 8 with the fixed contact 11 printed on the circuit board 3. As another example of the conventional technique shown in FIG. 6, a plurality of light emitting elements 14 for illumination are connected on a circuit board 13, and terminals 15 of the light emitting elements 14 are soldered to a conductor portion of the circuit board 13. 15a, and the structure in which the case 16 is provided with a plurality of openings 16a is the same as the structure shown in FIG. An illumination display switch of this type is disclosed in Japanese Utility Model Laid-Open No. 64-35626.

[0003]

[Problems to be solved by the device]

 Among the above-mentioned conventional techniques, the conventional technique shown in FIG. 5 has a problem in that the light distribution path changes depending on the position of the lamp 4, the shape of the light guide 5, and the like, and the illumination of the display portion 2 of the knob 1 becomes uneven. . Further, in the conventional techniques shown in FIGS. 5 and 6, the circuit boards 3 and 13 must be removed from the cases 6 and 16 when the lamp 4 and the light emitting element 14 of the light source are replaced due to a failure or the like. There is. For example, in the case of an automobile switch, after first removing the entire switch body from the vehicle body, then removing the circuit boards 3 and 13 from the cases 6 and 16 and further attaching the lamp 4 and the light emitting element 14 to the circuit boards 3 and 13. It is necessary to remove it and replace it with a new one, which requires time and effort.

[0004]

[Means for Solving the Problems]

 In view of the above drawbacks, the present invention has a built-in light emitting element for each display portion in the knob, and the light emitting element is provided with a conductive pattern layer for supplying power from a contact piece fixed to a circuit board, and the knob is attached to and detached from the case. By providing a stopper at the lower end of the light-shielding resin layer that forms the knob body to make it flexible, the light source of the knob lighting device in the switch etc. can be easily replaced with a one-touch type by replacing only the knob. In addition, the purpose is to eliminate uneven illumination of the knob display.

[0005]

【Example】

 1, FIG. 2, FIG. 3, and FIG. 4 show an embodiment of a knob lighting device in a switch or the like according to the present invention. FIG. 1 is a front view of a switch knob, and FIG. 3 is a cross-sectional view including a switch portion in the direction of the arrow I-I line in FIG. 3, FIG. 3 is a cross-sectional view including the switch portion in the direction of the arrow II-II line in FIG. 1, and FIG. FIG.

Reference numeral 20 is a knob such as a push switch. The knob 20 includes support plates 25 and 26 on which light emitting elements 23 and 24 are mounted, lens portions 27 and 28, a light shielding resin layer 29, first conductive pattern layers 30 and 31, and second conductive pattern layers 32 and 33. , The diffusion coating layers 34 and 35, and the mask coating layer 36 are integrally formed. The supporting plates 25 and 26 are printed with a conductive pattern made of copper or a conductive resin for fixing the light emitting elements 23 and 24 and connecting the lower surface of the light emitting elements 23 and 24 to the upper lead portion 37. It is a substrate on which the first conductive pattern layers 30 and 31 are formed.

The light emitting elements 23 and 24 have lower surfaces and upper lead portions 37 connected to the first conductive pattern layers 30 and 31 of the support plates 25 and 26, and the first and second display of the knob 20. The parts 21 and 22 are illuminated. The first and second display portions 21 and 22 are formed by partially depositing the mask coating layer 36 on the transparent diffusion coating layers 34 and 35. The first display unit 21 is a display unit that illuminates when the switch is turned on, and the second display unit 22 is a display unit that illuminates at night.

The lens portions 27 and 28 are made of a translucent resin that seals the upper and peripheral portions of the light emitting elements 23 and 24, and the light from the light emitting elements 23 and 24 is displayed on the first and second display portions of the knob 20. This is to lead to the translucent diffusion coating layers 34 and 35 of the portions 21 and 22. The lens portions 27 and 28 are made of a transparent resin such as a transparent acrylic synthetic resin. Diffusion coating layers 34 and 35 are attached to the upper surfaces of the lens portions 27 and 28.

The light-shielding resin layer 29 forms the knob body, and the peripheral portions of the support plates 25 and 26 and the lens portions 27 and 28 and the lower portion are integrally formed by double molding or two-color molding. . The light shielding resin layer 29 is made of, for example, a synthetic resin mixed with a black pigment or the like. Further, the light-shielding resin layer 29 has an operating rod 38 protruding from the center of the lower surface. The operating rod 38 urges the switch portion 40 of the rubber contact 39.

The second conductive pattern layers 32 and 33 are formed by printing a conductive pattern made of the same type of copper or conductive resin as the first conductive pattern layers 30 and 31 on an aluminum foil (not shown) or the like. Then, the second conductive pattern layers 32 and 33 are mounted and supported on the conductive patterns printed on the aluminum foil with the support plates 25 and 26 including the lens portions 27 and 28 encapsulating the light emitting elements 23 and 24. The first conductive pattern layers 30 and 31 of the plates 25 and 26 and the conductive pattern printed on the aluminum foil are connected with a conductive adhesive 41, and this aluminum foil is applied to a resin molding die (not shown). After setting and molding the light-shielding resin layer 29, the aluminum foil is peeled off to form the second conductive pattern layers 32 and 33 on the inner surface of the knob 20.

The second conductive pattern layers 32 and 33 receive power from the circuit board 44 through the contact pieces 42 and 43 for lighting the light emitting elements 23 and 24. The contact pieces 42 and 43 are fixed to the circuit board 44, and are, for example, thin phosphor bronze spring plates punched with a press and then plated with silver. The contact pieces 42 and 43 are elastically brought into contact with the second conductive pattern layers 32 and 33 to supply power to the light emitting elements 23 and 24 from the circuit board 44.

Reference numerals 45 and 45 are stoppers, and these stoppers 45 and 45 are elastic locking claws formed by partially projecting a light-shielding resin layer 29 outward at two places on the lower side of the outer periphery of the knob 20. Become. The stoppers 45, 45 attach the knob 20 to the inside of the opening portion 47 of the case 46 so as to be retractable, and lock the knob 20 on the lower peripheral edge of the opening portion 47 so that the knob 20 can be separated from the inside of the opening portion 47. Is to prevent.

The stoppers 45, 45 are provided to allow the knob 20 to be attached to and detached from the case 46. The stopper 20 is attached by inserting the knob 20 into the opening 47 of the case 46. A force is applied in a direction sandwiching the stoppers 45, 45 of the knob 20, that is, an arrow X direction so that the lower end is elastically deformed inward as shown by a broken line and can be removed upward.

The mask coating layer 36 covers the surface of the light-shielding resin layer 29 forming the main body of the knob 20 and partially covers the surfaces of the diffusion coating layers 34, 35 of the first and second display portions 21, 22. It is formed of a light-shielding coating layer for improving the appearance of the knob 20 while forming the first and second display portions 21 and 22 by wearing. The rubber contact 39 is laid on the circuit board 44 and has a movable contact 48 inside the switch section 40. Reference numeral 49 is a fixed contact that contacts the movable contact 48, and is printed on the circuit board 44.

In the switch constructed as described above, when the knob 20 is lowered by the switch operation, the switch portion 40 of the rubber contact 39 laid on the circuit board 44 is bent, and the movable contact 48 printed on the inside of the switch portion 40. When the fixed contacts 49 printed on the circuit board 44 come into contact with each other, the control unit (not shown) arranged on the circuit board 44 turns on or off the light emitting element 23 of the first display unit 21.

The first display unit 21 illuminates the light emitting element 23 so that it can be confirmed that the function displayed on the second display unit 22 is in operation. The second display section 22 displaying the function of the switch is for turning on / off the light emitting element 24 by a lighting switch (not shown), and the second display section 22 confirms its position and function at night. The light-emitting element 24 is turned on so that it can be illuminated.

Power is supplied to the light emitting elements 23 and 24 by a contact piece 42 fixed on the circuit board 44 according to an operation of the control unit (not shown) or the lighting switch (not shown), and Power is supplied from 43 to the second conductive pattern layers 32 and 33, the conductive adhesive 41, the first conductive pattern layers 30 and 31, the lower surface of the light emitting element and the lead portion 37 above. Further, the light from the light emitting elements 23 and 24 passes through the transparent resin of the lens portions 27 and 28 and is diffused by the diffusion coating layers 34 and 35, so that the first and second display portions 21 and 22 are illuminated clearly.

A plurality of light emitting elements may be used for one display portion, and the conductive pattern layer is not limited to a push button switch and may be used for a seesaw type switch. It is sufficient that the contact piece can supply power to the conductive pattern layer irrespective of the operation of the knob, and a conductive coil spring may be used to supply current above and below the spring.

[0019]

[Effect of device]

 In this invention, a light emitting element is built in each display part in a knob such as a switch, and the light emitting element is provided with a conductive pattern layer for supplying power from a contact piece fixed to a circuit board, and the knob is removed from the case. A stopper is provided at the lower end of the light-shielding resin layer that forms the knob body to make it detachable, and by replacing only the knob, the light source of the knob lighting device such as a switch can be easily replaced with a one-touch type. In addition, uneven illumination on the knob display can be eliminated. In addition, the color of the light source can be easily changed at any time by providing a knob for each color, and it is possible to change the illumination.

[Brief description of drawings]

FIG. 1 is a front view of a knob such as a switch according to the present invention.

FIG. 2 is a cross-sectional view including a switch portion taken along line I-I of FIG.

FIG. 3 is a cross-sectional view including a switch unit taken along line II-II in FIG.

FIG. 4 is an enlarged cross-sectional view showing a connection portion of the light emitting device of FIG.

FIG. 5 is a cross-sectional view of an illuminated display switch showing a conventional technique using a lamp and a light guide.

FIG. 6 is a cross-sectional view of an illuminated display switch showing a conventional technique in which a light emitting element is arranged on a circuit board.

[Explanation of symbols]

 20 Knob 21 1st display part 22 2nd display part 23, 24 Light emitting element 27, 28 Lens part 29 Light-shielding resin layer 30, 31 1st conductive pattern layer 32, 33 2nd conductive pattern layer 45, 45 Stopper

Claims (1)

[Scope of utility model registration request] 1. In a switch knob, a light-emitting element provided below the inside of the knob and provided for each display section, a lens section formed by sealing the light-emitting element with a translucent resin, and the lens A knob in a switch or the like characterized by including a light-shielding resin layer that encloses a portion and has a stopper at the lower end and forms the body of the knob, and a conductive pattern layer provided on the lower surface of the lens portion. Lighting equipment.