JPH08161956A - Light-source unit and lighting-system-equipped switch having the same built in - Google Patents

Abstract

PURPOSE: To provide a new light-source unit by which equipment incorporating it can be thinned and light beams can be used effectively and a lighting-system- equipped switch having the light-source unit built in. CONSTITUTION: A light-source unit 1 comprises a small bulb 10, a light source holder 6 made of an insulating material to hold the small bulb, and a circuit substrate 2 having the light source holder mounted thereon, the small bulb 10 being mounted with its axis extending along the direction of the plane of the circuit substrate 2. A lighting-device-equipped switch has such a light source unit built in.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel light source unit and a switch with a lighting device which incorporates the light source unit. More specifically, it is intended to provide a novel light source unit that enables thinning of a device incorporating the light source unit and can effectively use a light flux, and a switch with a lighting device that incorporates the light source unit. is there.

[0002]

2. Description of the Related Art Conventionally, when a light source such as a small light bulb or an LED (light emitting diode) is mounted on a circuit board, the axis of the light source a is perpendicular to the mounting surface c of the circuit board b as shown in FIG. It was common to install in the following orientation.

[0003]

However, when such a circuit board b is built in a switch d with an illuminating device as shown in FIG. 24 and used as a light source unit to illuminate the dial knob e at night, the light source is changed. The direction of the luminous flux of the body a is the axial direction of the light source body a as shown by the arrow f in FIG. 23, while the direction in which actual illumination is required is the same as in FIG.
3 is the direction indicated by the arrow g, and there is a problem that the dial knob e cannot be sufficiently illuminated.

Further, since the light source body a projects in a direction perpendicular to the plane of the circuit board b, the thickness of the device, in the above example, the switch d with illumination device in the direction perpendicular to the plane of the circuit board b ( (Indicated by arrow h in FIG. 24) becomes large.

[0005]

In order to solve the above-mentioned problems, a light source unit of the present invention includes a light source body, a light source body holder made of an insulating material for holding the light source body, and a circuit to which the light source body holder is attached. The light source body is composed of a substrate and the axis of the light source body is attached in a direction along the plane direction of the circuit board, and the switch with an illumination device of the present invention incorporates the light source unit.

[0006]

Therefore, in the light source unit of the present invention, when the direction requiring illumination is along the plane of the circuit board, the luminous flux can be effectively utilized, and the light flux is perpendicular to the plane of the circuit board. The thickness of the light source unit can be reduced by reducing the thickness of the light source unit.

Further, in the switch with a lighting device incorporating the light source unit according to the present invention, the luminous flux of the light source body can be effectively used to brighten the illumination, and the circuit board is also provided. It is possible to reduce the thickness by reducing the thickness in the direction perpendicular to the plane.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The light source unit of the present invention and a switch with an illumination device incorporating the light source unit will be described in detail below with reference to the illustrated embodiments.

First, the light source unit will be described.

1 to 3 show a first light source unit according to the present invention.
FIG.

In the figure, 1 is a light source unit, and 2 is a circuit board.

The circuit board 2 is in the shape of a rectangular plate and has a large number of circuit components (not shown) mounted thereon. Reference numerals 3 and 3 denote connection terminal portions for a small light bulb formed on one flat surface 4 of the circuit board 2. A rectangular cutout 5 is formed at the substantially center of one edge of the circuit board 2 in the longitudinal direction.

A light source holder 6 is made of heat resistant synthetic resin or heat resistant rubber.

The light source body holder 6 is in the form of a slightly flat square block, and is forward and backward on both sides (the direction toward the lower left in FIG. 1 is the front, and the direction toward the upper right is the rear.
The direction to the upper left is left and the direction to the lower right is right. The following directions are also based on this direction. The engaging grooves 7, 7 extending in the () direction are formed.

The light source body holder 6 has through holes 8 which are semicircular in cross section and extend from approximately the center of the front end face to approximately the center of the rear end face.

A support cylinder 9 is provided so as to project forward at a position surrounding the insertion holes 8 on the front end face.

Reference numeral 10 denotes a small light bulb, which is a so-called wedge base lamp and has no base. Reference numeral 11 denotes a glass ball, a crushed portion 12 is formed at a rear end portion thereof, and lead wires 13 and 13 are led out from a rear end of the crushed portion 12. Reference numeral 14 is a filament arranged in the glass bulb 11.

The compact bulb 10 is held by pressing the crushed portion 12 of the glass bulb 11 into the support tube 9 of the light source holder 6. Then, at this time, the lead wires 13, 13 are inserted into the insertion holes 8, 8 of the light source body holder 6 from the front side and led out from the rear end of the light source body holder 6. In this way, the small light bulb 10 is held by the light source body holder 6.

The light source body holder 6 holding the small light bulb 10 is inserted into the cutout portion 5 of the circuit board 2, and both side edges of the cutout portion 5 are press-fitted into the engaging grooves 7, 7 of the light source body holder 6. The light source body holder 6 and the circuit board 2
Is held. And the lead wire 13 of the small light bulb 10,
13 are separately soldered to the connection terminal portions 3 and 3 of the circuit board 2. As a result, the small light bulb 10 is connected to the circuit on the circuit board 2.

FIGS. 4 to 6 show a second light source unit according to the present invention.
FIG.

In the figure, 1A is a light source unit.

A circuit board 2A has a rectangular plate shape and has a large number of circuit components (not shown) mounted thereon. Reference numerals 15 and 15 denote conductor portions for supplying power to a small light bulb, which are formed on one flat surface 4 of the circuit board 2, and the connection end portion 1 thereof.
5a and 15a are located along the side edge of the rectangular notch 5 formed in the approximate center of one edge in the longitudinal direction of the circuit board 2A.

A light source holder 6A is made of heat resistant synthetic resin or heat resistant rubber.

The light source body holder 6A is in the form of a slightly flat rectangular block, and engaging grooves 7, 7 extending in the front-rear direction are formed on both side surfaces.

The light source holder 6A is provided with through holes 8 having a semicircular cross section and extending substantially from the center of the front end face to the center of the rear end face.

A support cylinder 9 is provided so as to project forward at a position surrounding the insertion holes 8 on the front end face.

L-shaped notches 16 are formed at both side edges of the upper surface of the light source holder 6A so that one end thereof reaches the side edge. Reference numerals 17 and 17 denote connecting grooves formed on the side surface of the light source holder 6A, and the connecting grooves 17 and 17 connect one end of the notches 16 and 16 to the engaging grooves 7 and 7.

Thus, the small bulb 10 has its glass bulb 1
The crushed portion 12 of No. 1 is press-fitted into the support cylinder 9 of the light source body holder 6A and supported by the light source body holder 6A. Then, the lead wires 13 and 13 are inserted through the insertion holes 8 and 8 of the light source body holder 6A from the front to the rear, and are further folded back along the rear end of the light source body holder 6A to be forward in the engagement grooves 7 and 7. And further bent inside the connecting grooves 17 and 17,
Then, it is bent along the notches 16 and 16. In this manner, the small light bulb 10 is supported by the light source body holder 6A, and a part of the lead wires 13, 13 is formed along the upper surfaces of the engagement grooves 7, 7 in a portion rearward of the connection grooves 17, 17. Is located.

The light source body holder 6A holding the small light bulb 10 is inserted into the cutout portion 5 of the circuit board 2A, and both side edges of the cutout portion 5 are press-fitted into the engagement grooves 7, 7 of the light source body holder 6A. The light source body holder 6A is held by the circuit board 2A. Then, the portions of the lead wires 13, 13 of the small light bulb 10 located along the upper surfaces of the engagement grooves 7, 7 are the connection terminal portions 15a, 15 of the circuit board 2A.
The small light bulb 10 is connected to the circuit on the circuit board 2 by being separately contacted with a.

FIG. 7 shows a third embodiment of the light source unit of the present invention.

Reference numeral 1B is a light source unit, which holds a large number of light source bodies on a circuit board.

The circuit board 2B is formed in a horizontally long rectangle,
A large number of notches 5, 5, ... Are formed on the front edge thereof. Then, the conductor portions 15, 15 for supplying power to the light source body,
The connection end portions 15a, 15a, ... Of are arranged along both side edges of the cutout portions 5, 5 ,.

As the light source body holder, the same light source body holders 6A, 6A, ... As shown in the second embodiment.
.. are used, and the light source holders 6A, 6A, ...
・ ・ Is supported. The rear ends of the LEDs 18, 18, ... Are supporting cylinders 9 for the light source holders 6A, 6A ,.
9 ... is press-fitted and held, and its lead wire 19,
, ... are the small light bulbs 1 in the second embodiment.
0 lead wires 13, 13, insertion holes 8, 8, ...
-Is inserted from the front to the back, is further folded back to the front, and is bent along the notches 16, 16.

The light source body holders 6A, 6A, ..., Which respectively support the LEDs 18, 18, .., are individually supported by the notches 5, 5 ,. And thereby, each LED 18, 18, ...
The lead wires 19, 19, ... Are individually contacted with the connection end portions 15a, 15a, ... Of the circuit board 2B, and the circuits on the circuit board 2B are provided through the conductor portions 15, 15 ,. Connected with.

And, such a light source unit 1B is
For example, it can be used as a light source of a horizontally long marker light for automobiles.

8 to 22 show an embodiment 20 of the switch with a lighting device according to the present invention.

In the twentieth embodiment, the switch with illumination device of the present invention is used as a leveling device for an automobile, that is, as an operation switch for a device for adjusting an irradiation angle of an automobile headlamp according to a load and a change in its position. It is applied.

Reference numeral 21 denotes a first housing, which is made of synthetic resin. Reference numeral 22 is a top plate, which is about a two-fifth portion of the front side (referred to as "front end") 23.
Is formed to be slightly narrower than the remaining portion (referred to as the “second half portion”) 24.

The side walls 25, 25 and 26, 26 are vertically provided on both side edges of the front end portion 23 and the rear half portion 24, respectively. The height of the side wall 25, 25 of the front end portion 23 is equal to that of the rear half portion 24. It is almost half the height of the side walls 26, 26. In addition, the side walls 26 of the rear half 24 and the front end 26 of the 26
a and 26a are bent so as to approach each other to form a step surface facing forward. Further, the side wall 2 of the rear half 24
Short ribs 26b, 26b are vertically provided from the outer half of the lower end surfaces of 6, 26. Also, shallow grooves 25a, 25 are formed in the rear portions of the lower end surfaces of the side walls 25, 25 of the front end portion 23.
a is formed. Engagement holes 27, 27 are formed at positions nearer to the front ends of the side walls 26, 26 of the rear half portion 24, slightly closer to the lower ends.

A cylindrical support projection 28 having a closed lower end is integrally provided at a position near the front end of the front end portion 23 of the upper plate 22, and a central hole 28a is opened to the upper surface of the front end portion 23. There is.

Reference numeral 29 is a rotation stopping projection vertically provided at the center of the front end of the rear half portion 24 of the top plate 22 in the left-right direction.
Reference numerals 30 and 30 denote pressing pieces projecting at positions slightly rearward of the centers of the side walls 26, 26 of the rear half portion 24, and the lower ends thereof end slightly above the lower ends of the side walls 26, 26.

Further, from the upper half of the front end surface of the front end portion 23 of the upper surface plate 22, engaging projection pieces 23a, 23a are provided in a protruding manner except for the central portion.

Reference numeral 31 is a dial knob, which is also made of synthetic resin. The dial knob 31 is formed in a generally cylindrical shape having a short axial length and a closed upper end,
A cylindrical supported portion 33 is vertically provided at the center of the closing wall 32.

A concavo-convex portion 35 is formed on the outer peripheral surface of the upper half portion of the approximately half-circumferential portion of the peripheral wall 34, and serves as a finger rest when the dial knob 31 is rotated. In addition, in the lower half of the portion where the uneven portion 35 is formed, the numeral 3 indicating the position is shown.
6, 36, ... Are formed in transparent characters.

A boss portion 37 extending in the axial direction along the inner peripheral surface of the peripheral wall 34 opposite to the portion on which the irregular portion 35 is formed.
Is formed, and the boss portion 37 is formed with a storage hole 38 that opens to the upper surface of the closing wall 32. Further, a mounting portion 39 is formed at a position close to the boss portion 37, and the lower surface of the mounting portion 39 has three caulking projections 40, 40, 40.
Is protruding.

Further, a portion of the outer peripheral surface of the peripheral wall 34 on the opposite side of the concave-convex portion 35 forming portion is provided with a shallow notch portion 41 over a range of a central angle of about 110 degrees.

Further, a light shielding wall 34a is vertically provided from the inner half portion of the lower end surface of the peripheral wall 34, and an overlapping portion 34b protruding outward is formed at the lower end of the light shielding wall 34a.

In the dial knob 31 as described above, the inner portion 31a and the outer portion 31b are made of different synthetic resins, and the inner portion 31a is made of a synthetic resin which transmits light and the outer portion 31b. Is a synthetic resin that does not transmit light and is formed by a so-called two-color molding method. The portions indicated by the numerals 36, 36, ... Are made of synthetic resin of the inner portion 31a. Further, at least the outer portion 31b is located at the light shielding wall 34a.

Reference numeral 42 is a contact member made of a conductive metal material, which is composed of a base portion 43 and two contact pieces 44c and 44p protruding from the base portion 43. The contact pieces 44c, 44p are two strips 45c, 45c, 45p, 45 extending in parallel.
p, and these strips 45c, 45c, 45p, 45
At the tip of p, there is a contact protrusion 4 protruding downward.
6, 46, ... Are formed. Further, the base portion 43 is provided with three mounting holes 47, 47, 47.

Then, the mounting holes 47, 47, 4 of the base portion 43
7 to the above-mentioned caulking protrusions 40, 40, 4 of the dial knob 31.
0 is inserted and the part of the caulking protrusion 40, 40, 40 projecting downward of the base 43 is caulked, whereby the contact member 42 is attached to the attaching portion 39 of the dial knob 31, and the contact pieces 44c, 44p thereof are attached. Will be extended diagonally downward.

The dial knob 31 described above is rotatably supported by the first housing 21 as follows.

That is, the support protrusion 28 of the first housing 21 is rotatably fitted in the supported portion 33 of the dial knob 31, and the shaft member 49 protruding from the center of the washer 48 is the support protrusion 28. The shaft member 4 is inserted through the lower end wall 28b.
A portion of the lower end wall 28b of the upper portion 9 of the dial 9 is crimped to prevent the washer 48 and the shaft member 49 from falling off the support protrusion 28. Further, the washer 49 lowers the lower end of the supported portion 33 of the dial knob 31. The dial knob 31 is rotatably supported by the first housing 21 while being prevented from falling off the support protrusion 28.

50 is a coil spring, and the dial knob 3
No. 1 is stored in the above-mentioned storage hole 38, and a steel ball 51 is provided on the upper end thereof.
And the steel ball 51 is elastically contacted with the lower surface of the upper plate 22 of the first housing 21. Then, in the lower surface of the upper surface plate 22 of the first housing 21, within the moving range of the steel ball 51, the number of concave portions 52, 52, ... Corresponding to the number of the numerals 36, 36 ,. Are formed at equal intervals in the direction.

In this way, the dial knob 31 has the first
It is rotatably supported by the housing 21 of the. The dial knob 31 is rotated within a range in which both ends of the cutout portion 41 formed on the outer peripheral surface of the dial knob 31 come into contact with the rotation stopping protrusions 29 provided on the first housing 21.

When one of the numbers 36, 36, ... Comes to the front, the steel ball 51 is fitted into the recess 52 corresponding to the number 36, and a click stop is applied there.
It should be noted that if the depths of the recesses 52, 52, ... Are made different, the selected position can be recognized without looking at the numeral 36 due to the difference in click feeling according to the depth. It becomes possible.

Reference numeral 53 is a second housing, which is made of synthetic resin.

Reference numeral 54 denotes a bottom plate, which is approximately two-fifths on the front side.
A large portion (referred to as "front end portion") 55 is formed slightly narrower than the remaining portion (referred to as "second half portion") 56. Side walls 57, 57 and 58, 58 are provided upright on both side edges of the front end portion 55 and the rear half portion 56, respectively. The height of the side walls 58, 58 of the rear half portion 56 is the same as that of the front end portion 5.
It is almost half of the height of the side walls 57 of 57. In addition, the front end portions 58a, 58 of the side walls 58, 58 of the rear half portion 56.
a are bent so as to approach each other, and form a step surface facing forward. Further, the ribs 58b, 5b, which are short from the inner half of the side walls 58, 58 of the latter half 56, are formed on the upper end surfaces thereof.
8b is projected. Also, the side wall 57 of the front end portion 55,
Short projections 57a, 57a are formed on the rear portion of the upper end surface of 57.

Further, notches 59, 59 are formed in portions of the side walls 58, 58 of the latter half portion 56 near the front ends, and the notches 59, 59 are formed.
Engaging pieces 60, 60 are provided so as to project upward from the rear end of 59, and engaging claws 60 are provided on the outer surfaces of the upper ends of the engaging pieces 60, 60.
a and 60a are projected.

A large notch 61 is formed in the rear half of the bottom plate 54, which occupies most of the rear half of the bottom plate 54 and is open at the rear end. Further, mounting bosses 62, 62 are provided at positions on the bottom plate 54 close to the left and right ends of the front end of the notch 61, and the positioning pins 62 are provided from the upper end surfaces of the mounting bosses 62, 62.
a and 62a are projected. 63 and 63 are bottom plates 54
Is a mounting protrusion projecting from the rear end of the inner side surface of the side walls 57, 57 of the front end 55 of the mounting boss 6 described above.
It is located at the same height as the upper end faces of the 2, 62. 64, 6
Reference numeral 4 is a positioning protrusion that is provided on a side portion of the notch 61 at a position slightly closer to the rear end from the center of the rear half portion 56 of the bottom plate 54, and the upper surface thereof is the same as the upper end surfaces of the placement bosses 62, 62. Located at height. In addition, the positioning protrusions 64, 64
Ribs 64a, 64a project from the latter half of the upper end surface of the.

Reference numeral 65 denotes a positioning projection protruding from the center of the front end of the bottom plate 54, and 66 and 66 are located at positions near the upper ends of the outer surfaces of the rear ends of the front ends 55 of the bottom plate 54. It is an engaging protrusion provided in a protruding manner.

A light source unit 67 is substantially the same as the light source unit 1A. Reference numeral 68 denotes a circuit board, which is substantially the same as the circuit board 2A of the light source unit 1A, except that conductor parts 15 and 15 for supplying power to the small light bulb 10 as well as conductor parts and electronic parts for leveling control are provided. The point is different. The circuit board 68 has a front half 69 slightly narrower than a rear half 70. Further, the notch 5 is formed at the center of the front edge of the front half 69, and the connection ends 15a, 15a of the conductors 15, 15 are located at both side edges of the upper surface of the notch 5. Further, a large notch 71 having an opening at the rear end is formed in the rear half 70. Positioning holes 72, 72 are formed in the rear half 70 at positions close to the left and right ends of the front end of the notch 71.
Supporting pieces 73, 73 project from the left and right edges of the rear end portion.

A predetermined circuit (not shown) is formed on the lower surface of the circuit board 68, and two arc-shaped contact portions 74c and 74p are formed by a printing resistor on the upper surface.

The small light bulb 10 is used as the light source holder 6A.
The light source body holder 6A is attached to the cutout portion 5 of the circuit board 68 by press-fitting both side edge portions of the cutout portion 5 into the engagement grooves 7, 7. Therefore, the small light bulb 10 is attached to the center of the front end portion of the circuit board 68 so as to project forward therefrom.

Reference numeral 75 denotes a connector, which comprises a box-shaped connector case 76 having an opening at the rear end and connector pins 77, 77, ... Supported by the connector case 76. Further, mounting pieces 78, 78 project from the positions of the left and right side surfaces of the connector case 76 near the lower ends. In such a connector 75, substantially the first half portion thereof is inserted into the notch 71 of the circuit board 68, and the attachment pieces 78, 78 are superposed on the support pieces 73, 73 of the circuit board 68. And
Screws 79, 79 inserted into the support pieces 73, 73 from below
Is screwed onto the attachment pieces 78, 78, and thereby the connector 75 is attached to the circuit board 68. The connection ends of the connector pins 77, 77, ... Are individually connected to predetermined circuits on the circuit board 68 by soldering.

The circuit board 68 supporting the above-mentioned connector 75 is placed on the second housing 53. That is, the rear end portion of the side edge of the front half portion 69 of the circuit board 68 is the mounting projection 63,
On the upper surface of 63, the rear end portion of the support piece 73 has the positioning protrusion 6
The peripheral portions of the positioning holes 72, 72 are mounted on the upper surfaces of the mounting bosses 62, 62, respectively, on the upper surfaces of 4, 4, 64, and the positioning pins 62a, 62a are inserted into the positioning holes 72, 72, and the supporting pieces The rear edges 73, 73 come into contact with the ribs 64a, 64a of the positioning protrusions 64, 64, and the positioning with respect to the second housing 53 is performed.

Then, the first housing 21 and the second housing 53 are joined.

That is, the first housing 21 is positioned so as to cover the upper side of the second housing 53, and the two are brought close to each other. This allows the side walls 2 of the front ends 23, 55 of each other to
The lower surfaces of 5, 25 and the upper surfaces of 57, 57 are butted against each other,
The ridges 57a, 57a engage the grooves 25a, 25a, and the lower surfaces of the side walls 26, 26 of the rear half portions 24, 56 and 58,
The upper surfaces of the ribs 58 are abutted against each other to form ribs 26b, 26b and 5
8b and 58b are engaged in a staggered position inside and outside. Then, the engaging claws 60a, 6 of the second housing 53
0a engages with the engagement holes 27, 27 of the first housing 21 to couple the first housing 21 and the second housing 53.

As described above, when the first housing 21 and the second housing 53 are joined together, the lower ends of the pressing pieces 30, 30 of the first housing 21 are attached to the mounting pieces 78, 78 of the connector case 76. The upper surface will be pressed from above. And the contact piece 44c of the dial knob 31
The contact protrusions 46, 46 are contact portions 7 on the circuit board 68.
4c, and the contact piece 44p contacts the contact protrusion 4
6, 46 contact the contact portion 74p.

Reference numeral 80 denotes a third housing, which is also made of synthetic resin.

Reference numeral 81 is a front panel, which has a horizontally long rectangular shape. An opening 82 having a horizontally long rectangular shape is formed in the upper half portion of the front panel 81.
A projecting edge 83 that projects forward in an arc shape is formed on the lower side of 2, and an outer peripheral wall 84 is projectingly provided on the peripheral edge of the projecting edge 83, and the outer peripheral wall 84 has indicator marks 85 and 86 in a transparent character shape. Has been formed.

A light-shielding wall 84a is provided on the upper end surface of the outer peripheral wall 84 so as to project from the outer half thereof. The light-shielding wall 84a is close to the light-shielding wall 34a of the dial knob 31 in a non-contact state, and in the inward and outward directions. They overlap. In addition, the light shielding wall 84
An inwardly projecting overlapping portion 84b is formed at the upper end of a, and the overlapping portion 84b is in close contact with the overlapping portion 34b of the light shielding wall 34a of the dial knob 31 in a non-contact state and the shaft of the dial knob 31. It is located so that it overlaps in the direction.

At the position along the upper edge of the opening 82 on the rear surface of the front panel 81, except for the central portion, engaging grooves 87, 87 are formed.
And a positioning groove 88 is formed at a position close to the center of the lower edge of the opening 82.

Further, a bottom plate 89 projects rearward from a height corresponding to a position just below the positioning groove 88 on the rear surface of the front panel 81, and slightly outside from the left and right side edges of the opening 82. Side walls 90, 90 are provided so as to project rearward from a position close to, and the lower edges of the side walls 90, 90 and the left and right side edges of the bottom plate 89 are continuous. The side wall 9
Central portions 91, 91 in the vertical direction of 0, 90 are slightly displaced inward, and engaging holes 92, 92 are formed at positions near the rear ends of the portions 91, 91. Furthermore,
U-shaped slits 93, 93, ... Opening rearward are formed in upper and lower portions of the side walls 90, 90 sandwiching the central portion 91, 91, respectively. The part surrounded by ... is the mounting piece 9
4, 94, ... and the mounting pieces 94, 94 ,.
Engaging claws 95, 95, ...

In the third housing 80 as described above, the front surface portion 80a of the front panel 81 and the other portion 80b are made of different synthetic resins, and the front surface portion 80a is made to emit light. A synthetic resin that does not transmit, and the other portion 80 b is a synthetic resin that transmits light and is formed by a so-called two-color molding method. The portions of the indication marks 85 and 86 are formed of the synthetic resin of the portion 80b. The light shielding wall 84a is formed by at least the portion 80a.

Thus, the third housing 80
Is connected to the combined body of the first and second housings 21 and 53 as follows.

That is, the first and second housings 21, 53
The front end portion of the combined body of FIG.
And insert from the back into the part surrounded by the side walls 90, 90. Then, the portion of the dial knob 31 supported by the first housing 21 that protrudes from the front end of the housing 21 protrudes forward from the portion of the opening 82 of the front panel 81 above the peripheral wall 84 of the protruding edge 83, and The engaging protrusions 23 a, 23 a formed at the front end of the upper plate 22 of the first housing 21 are engaged with the engaging grooves 87, 8 of the front panel 81.
Bottom plate 5 of the second housing 53.
The positioning protrusion 65 formed at the front end of the No. 4 is engaged with the positioning groove 88 of the front panel 81 to be positioned with respect to the third housing 80, and the front end side wall 57 of the second housing 53, Engagement protrusion 6 formed on 57
6, 66 are side wall central portions 91, 9 of the third housing 81.
1 to engage with the engagement holes 92, 92, and thereby the first,
The second and third housings 21, 53 and 80 are combined to form the operation switch 20.

The operation switch 20 described above is attached to a front panel (not shown) of the automobile. At this time, the mounting pieces 94 formed on the third housing 80,
The engaging claws 95, 95 of 94 are engaged with the engaging holes formed in the side surface of the recess formed in the front panel of the automobile,
The operation switch 20 is attached to the front panel of the automobile.

In actual mounting, the upper and lower sides in the above description are the left and right sides, and the left and right sides are the upper and lower sides. This is because the directionality is set as described above for the sake of easy understanding of the description. Therefore, the dial knob 31 rotates in the vertical direction. The mounting orientation of the operation switch 20 is such that the leveling adjustment is to adjust the irradiation axis of the headlamp up and down, and therefore, when adjusting the irradiation axis upward, the dial knob 31 is moved upward. When the dial knob 31 is rotated and adjusted downward, it is better to rotate the dial knob 31 downward because the sense of direction of the operation and the direction of adjustment of the control target are matched, and sensory unnaturalness does not occur. is there.

Then, when the small light bulb 10 is turned on, the light of the small light bulb 10 is emitted from the dial knob 31 by the numerals 36, 36 ,.
... and the instruction marks 85 and 86 on the front panel 81
Through, and these look shiny.

When performing the leveling adjustment, the dial knob 31 is rotated upward or downward so that the numeral 36 corresponding to the desired adjustment angle is aligned with the instruction mark 85.

When the dial knob 31 rotates,
The contact position of the contact piece 44c with respect to the contact portion 74c and the contact position of the contact piece 44p with respect to the contact portion 74p move. Therefore, the resistance value between the counterclockwise end of the contact portion 74c and the clockwise end of the contact portion 74p changes,
The value of the current flowing here changes. Therefore, the change in the current value is taken out as a control signal, and the drive angle of the headlight is adjusted by controlling the drive unit such as a motor by constant current control, for example.

In the operation switch 20 described above, it is possible to reliably prevent the light of the small light bulb 10 from leaking to the outside. That is, the light-shielding wall that is in non-contact state between the peripheral wall 34 of the dial knob 31 and the outer peripheral wall 84 of the protruding edge 83 of the third housing 80 that may leak light and that overlaps in the inner and outer directions. 34a and 84a are formed, and the dial knob 31 is provided on the light shielding walls 34a and 84a.
Since the overlapping portions 34b and 84b that are close to each other in the axial direction of the non-contact state and overlap with each other are formed, the space between them becomes a so-called labyrinth, and the light of the small light bulb 10 passes through the space between them. It is surely prevented that light leaks through the outside.

Further, since the axial direction of the small light bulb 10 extends in the front-rear direction and is attached to the center of the front end portion of the circuit board 68, the direction in which the small light bulb 10 requires irradiation and the axis of the small light bulb 10 are different from each other. Coincide with each other, and therefore the luminous flux is utilized without waste.

Furthermore, since the protrusion amount of the small light bulb 10 in the direction orthogonal to the surface of the circuit board 68 is small, the thickness of the operation switch 20 using the light source unit 67 can be reduced.

[0085]

As is apparent from the above description, the light source unit of the present invention includes a light source body, a light source body holder made of an insulating material for holding the light source body, and a circuit board to which the light source body holder is attached. The light source body is characterized in that its axis is attached in a direction along the plane direction of the circuit board. Further, the switch with illumination device of the present invention incorporates the light source unit.

Therefore, in the light source unit of the present invention,
When the direction requiring illumination is along the plane of the circuit board, the luminous flux can be effectively used, and the thickness in the direction perpendicular to the plane of the circuit board is reduced to reduce the light source unit. The thickness of the equipment used can be reduced.

Further, in the switch with a lighting device incorporating the light source unit according to the present invention, the luminous flux of the light source body can be effectively utilized, and the lighting can be brightened. It is possible to reduce the thickness by reducing the thickness in the direction perpendicular to the plane.

The specific shapes and structures of the respective parts shown in the above-mentioned respective embodiments are merely examples of the embodiment when the present invention is carried out, and the technology of the present invention is applied by these. The scope should not be construed as limiting.

[Brief description of drawings]

FIG. 1 is a first part of a light source unit according to the present invention, together with FIGS.
FIG. 3 is a perspective view showing the embodiment of FIG.

FIG. 2 is an exploded perspective view.

FIG. 3 is a perspective view of the light source body holder supporting the light source body as seen from the rear side.

FIG. 4 is a second view of the light source unit of the present invention together with FIG. 5 and FIG.
FIG. 3 is a perspective view showing the embodiment of FIG.

FIG. 5 is an exploded perspective view.

FIG. 6 is a perspective view of a light source body holder supporting the light source body as seen from the rear side.

FIG. 7 is a perspective view showing a third embodiment of the light source unit of the present invention in a state where a part of the light source body holder and the light source body are separated and removed from the circuit board.

FIG. 8 shows an example of implementation of a switch with a lighting device of the present invention together with FIG. 9 to FIG.

9 is an enlarged view showing an IX portion in FIG.

FIG. 10 is a plan view.

FIG. 11 is a bottom view.

FIG. 12 is a side view.

FIG. 13 is a front view.

FIG. 14 is a perspective view of the lower side of the first housing supporting the dial knob.

FIG. 15 is an exploded perspective view showing a contact piece and its mounting portion in an enlarged manner.

FIG. 16 is an enlarged perspective view showing a state in which the contact piece is attached to the attachment portion.

FIG. 17 is a plan view showing a housing that supports a dial knob.

FIG. 18 is a perspective view of a second housing.

FIG. 19 is a plan view of a light source unit.

FIG. 20 is a plan view showing a state in which the light source unit is placed on the second housing.

21 is an enlarged cross-sectional view taken along the line XXI-XXI of FIG.

FIG. 22 is a perspective view of a third housing.

FIG. 23 is a perspective view showing an example of a conventional light source unit.

FIG. 24 is a perspective view showing an example of a conventional switch with a lighting device, with a part thereof cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 light source unit 2 circuit board 6 light source body holder 7 engaging groove (mounting part to circuit board) 10 small light bulb (light source body) 13 lead wire 1A light source unit 2A circuit board 6A light source body holder 15 conductor part (circuit) 16 notch Part 1B Light source unit 2B Circuit board 18 Light emitting diode (light source) 20 Operation switch (switch with illumination device) 67 Light source unit 68 Circuit board

Claims (4)

[Claims] 1. A light source body, a light source body holder made of an insulating material for holding the light source body, and a circuit board to which the light source body holder is attached. The light source body has an axis line in a plane direction of the circuit board. A light source unit characterized in that it can be mounted along the direction. 2. A light source body holder is formed with a cutout portion communicating with a mounting portion to a circuit board, and a lead wire of the light source body is engaged with and supported by the cutout portion, whereby the light source body holder is attached to the circuit board. The light source unit according to claim 1, wherein the lead wire comes into contact with a circuit on the circuit board when attached. 3. A switch with an illumination device, which incorporates the light source unit according to claim 1. 4. A switch with a lighting device, which incorporates the light source unit according to claim 2.