JPH0798234A - Lighting device of measuring instrument - Google Patents

Abstract

PURPOSE:To provide the lighting device of a measuring instrument which can reduce assembly man-hour. CONSTITUTION:An end plate 6 is mounted to the front circumference of a measuring instrument case 1 and a cover body 10 for lighting with a lighting lamp 12 is engaged to the upper part of the end plate 6 by a gear-lock part. A conductor 11 connected to the terminal part of the lighting lamp 12 is buried into a cover body 10 for lighting, the terminal part of the conductor 11 protrudes from one part of the cover body 10 for lighting, a flexible printed wiring board 13 is provided along the rear and upper surfaces of the measuring instrument case 1, and then the cover body 10 for lighting is engaged to the end plate, thus electrically connecting the terminal part of the conductor 11 to the terminal part of a connection wire for lighting lamp which is provided at one part of the flexible printed wiring board 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device for measuring instruments used in vehicle meters and the like.

[0002]

2. Description of the Related Art Conventionally, in a vehicle instrument, an illuminating device has been known in which an illumination or the like is attached to the inside of the upper part of an instrument case to illuminate the front of a dial. The power supply printed circuit board is arranged on the back surface of the instrument case to energize the pointer driving movement and the like, and it is necessary to connect the lead wire from the printed circuit board to the illumination lamp.

[0003]

Therefore, there is a problem that a large number of assembling steps are required due to the use of the lead wire.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an illuminating device for an instrument which can reduce the number of assembling steps.

[0005]

In order to achieve the above-mentioned object, a lighting device for an instrument according to the present invention is a lighting device in which a dial plate is attached to the front peripheral edge of an instrument case, and an illumination lamp is provided above the dial plate. In an illuminating device for an instrument in which a cover body for fitting is fitted by a locking portion, a conductor connected to a terminal portion of an illuminating lamp is embedded in the illuminating cover body, and a conductive material is partially attached to the illuminating cover body. The terminal portion of the body is projected, and the flexible printed wiring board is arranged along the back surface and the upper surface of the instrument case. By fitting the lighting cover body to the facing plate, the terminal portion of the conductor is flexible. It is characterized in that it is in contact with and electrically connected to a terminal portion of a connection line for an illumination lamp provided on a part of the printed wiring board.

[0006]

[Operation / Effect] In the illumination device of the instrument having such a configuration,
A conductor is embedded in the lighting cover body, while a flexible printed wiring board is arranged along the back and upper surfaces of the instrument case, and the lighting cover body is fitted at a predetermined position on the top plate of the lighting cover body. By this, the terminal portion of the protruding conductor and the terminal portion of the connection line for the illumination lamp provided in a part of the flexible printed wiring board are connected, and the flexible printed wiring board, the connection line for the illumination lamp, and the conductor are connected. It is possible to supply power to the lighting.

As described above, since the assembling work can be completed simply by fitting the illuminating cover body to which the illuminating lamp is attached to the upper part of the facing plate, the illuminating lamp and the printed circuit board are connected by the lead wire as in the conventional case. This eliminates the need for complicated work and reduces the number of assembly steps.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view from the back of a vehicle instrument to which the present invention is applied, and FIG. 2 is a sectional view thereof.
Reference numeral 1 denotes an instrument case made of synthetic resin, and a movement 2 such as a speedometer is arranged in the instrument case 1. A dial 3 is fixed to the front surface of the instrument case 1, and a pointer shaft 4 of the movement 2 projects from a hole formed at the center of the dial 3,
A pointer 5 is fixed to the tip of the pointer shaft 4.

A dial plate 6 is provided around the front edge of the instrument case 1.
The front light-transmissive plate 7 is attached so as to cover the front surface of the dial plate 6 so that the lower part of the front light-transmissive plate 7 comes out forward and the upper part thereof comes out forward. Further, the dial plate 6 is locked to the instrument case 1 by a simple operation by a claw-shaped locking portion 6a provided on the lower portion and a locking portion 6b provided on the upper portion.

Further, an opening for illumination is formed in the upper part of the dial plate 6, and a transparent plate 8 is attached to the opening.
The illumination cover body 10 is attached to the upper side of the opening so as to cover the opening.

As shown in FIGS. 3 and 4, the illuminating cover body 10 is made of synthetic resin in a shape in which a rectangular box is turned down, and a connecting portion 10a is provided on the lower portion on the back side so as to project. Also,
This illumination cover body 10 is provided with two holes on the front side thereof, and two illumination lamps 12 are fitted and fixed in the holes. In order to energize these illumination lamps 12, Two pairs of conductors 11 are insert-molded and embedded when the cover body 10 is molded.

The two pairs of conductors 11 are made of a metal wire such as a copper alloy. One end of the conductor 11 projects to the outside of the connecting portion 10a to form a terminal portion 11a, and the other end is located on the front surface side for inserting an illumination lamp. Terminal part 1 that is installed around the
It is exposed to the front side as 1b. A connection terminal portion is exposed on the front surface of the socket portion of the illuminating lamp 12, and when the illuminating lamp 12 is fitted into the hole with the bulb inside, the connecting terminal portion comes into contact with the terminal portion 11b to electrically The connection is made.

Claw-shaped locking portions 10c are provided on both sides of the lighting cover body 10, and the locking plates 10c have a look-back plate 6.
The lighting cover body 1 is locked to the engaging portion provided on the upper part of the
0 is fitted on the dial plate 6.

As shown in FIG. 4, a slit 1a for inserting the connecting portion 10a of the lighting cover body 10 is formed at the center of the upper portion of the contact portion between the instrument case 1 and the dial plate 6.
Further, on the rear surface of the instrument case 1, an FPC (flexible printed wiring board) 13 is arranged along the surface.

The upper part of the FPC 13 is connected to the lighting lamp connecting line 13.
a is extended to the upper surface of the case with the width of the slit 1a, and the conductor 1 is attached to the tip of the illumination lamp connection line 13a.
The terminal portion that is connected to the terminal portion 11a of No. 1 by being exposed is provided (FIG. 2). The position of the terminal portion at the tip of the illuminating lamp connection line 13a is set to match the position of the terminal portion 11a of the conductor 11.

In the FPC 13, in addition to a power line for energizing the illuminating lamp 12, a signal line of a meter and a power line for an internal illuminating lamp 14 described later are formed. The signal line is connected to the movement inside the instrument case 1, and the power line for the internal illumination lamp is arranged around the insertion hole for the internal illumination lamp provided on the back surface of the instrument case 1, and the tip is exposed as a terminal portion. To do.

The internal illuminating lamp 14 is attached so that a bulb is inserted into an insertion hole provided on the rear surface of the case, and the above-mentioned terminal portion comes into contact with the connection terminal portion provided on the front surface of the socket portion of the illuminating lamp to establish an electrical connection. Done. Further, on the FPC 13, a connector 1 for connecting a power line and a signal line from the outside is connected.
5 is attached so as to be inserted into the hole of the instrument case 1, and each terminal of the connector is connected to a predetermined conductive line.

In the vehicle instrument thus constructed, the FPC 13 is attached to the rear surface of the instrument case 1, the internal illumination lamp 14 and the connector 15 are attached, and the dial plate 6 is attached to the instrument case 1 during the assembling work. It is attached to the front surface by locking portions 6a and 6b.

Next, as shown in FIG. 4, the illumination cover body 10 to which the illumination lamp 12 is attached is inserted into the slit 1a in the upper portion of the instrument case 1 while the connection portion 10a is inserted into the upper opening of the dial plate 6. The locking portion 10c so as to cover the portion
Lock and fit.

At this time, two pairs of terminal portions 11a projecting from the rear surface of the connecting portion 10a are located in the slits, respectively.
The two illumination lamps 12 are connected to the illumination lamp connecting wire 13a of the FPC 13 via the conductor 11 inside the cover body while pressing and contacting the terminal portion of the tip of the illumination lamp connecting wire 13a of C13.

As described above, the electric connection of the illuminating lamp 12 can be easily and easily performed by simply inserting the illuminating cover body 10 onto the instrument case 1 and the dial plate 6.

Then, at the time of use, the power source connected to the FPC 13 supplies power to the illuminating lamp 12 through the illuminating lamp connecting line 13a and the conductor 11 to turn on the illuminating lamp 12, and similarly, the internal illuminating lamp 14 Also, power is supplied from the power supply line of the FPC 13 to turn on the internal illumination lamp 14.

[Brief description of drawings]

FIG. 1 is a perspective view of a vehicle instrument showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged cross-sectional view of a lighting cover body 10.

FIG. 4 is a perspective view showing an assembled state of the device.

[Explanation of symbols]

1-Instrument case, 6-Look plate, 10-Lighting cover body, 11-Conductor, 11a-Terminal part, 12-Lighting lamp, 1
3-FPC (flexible printed wiring board).

Claims (1)

[Claims] 1. An illuminating device for an instrument, wherein a dial plate is attached to a front peripheral edge of an instrument case, and an illumination cover body provided with an illuminating lamp is fitted to an upper portion of the dial plate by a locking portion. A conductor connected to the terminal portion of the illuminating lamp is embedded in the lighting cover body, and a terminal portion of the conductor is projectingly provided on a part of the lighting cover body, and the back surface and the top surface of the instrument case are provided. A flexible printed wiring board is provided along the flexible printed wiring board, and the terminal portion of the conductor is provided in a part of the flexible printed wiring board by fitting the lighting cover body to the facing plate. A lighting device for an instrument, which is in contact with a terminal portion of a connecting wire and electrically connected thereto.