JP2002243507A - Onboard meter and manufacturing method for onboard meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an onboard meter having a dial improved in illumination balance without increasing the number of light sources and to provide its manufacturing method. SOLUTION: A diffusing plate 602 is disposed between the backside of the dial 601 and the light sources 91-94. The diffusing plate 602 is manufactured by being extruded in a certain extruding direction, and the extruding direction is so set as to be parallel with lines connecting the light sources 91 and 92, and the light sources 93 and 94. Thus, by disposing the diffusing plate 602 by setting the extruding direction of the diffusing plate 602 in parallel with the lines connecting the light sources 91 and 92, and the light sources 93 and 94, the light from the light sources 91-94 is effectively diffused. As a result, the dial 601 is illuminated with good balance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted meter having a dial illuminating device and a method of manufacturing the same, and more particularly to a vehicle-mounted meter for illuminating a dial efficiently by disposing a diffusion plate on the back side of the dial. It relates to the manufacturing method.

[0002]

2. Description of the Related Art In recent years, many vehicles are equipped with a combination meter in which a direction indicating unit, various warning display units, and the like are integrated in addition to a speedometer unit and a tachometer unit. Each section has a thin plate-shaped dial plate corresponding to each display content and a light source spaced apart from the rear side of the dial plate. However, since these light sources are arranged in consideration of space restrictions, the position of the display design formed on the dial, and the like, the illumination of the dial may vary. This problem will be described below with reference to FIGS.

FIG. 5 is an explanatory diagram showing variations in illumination in a speedometer section. FIG. 6 is an explanatory diagram showing the principle of the variation of the illumination shown in FIG. In the explanatory diagram shown in FIG. 5, the speedometer section is included in the combination meter. The dial 601 is, for example, a disc-shaped sheet plate made of a transparent material made of a polycarbonate sheet. The dial 601 is coated with, for example, black-based ink with its display design being hollow. This display design is a plurality of numbers, 20, 40,... Indicating a plurality of different traveling speeds formed near the outer periphery of the disk-shaped dial 601. Either of these numbers is indicated by a pointer not shown in this figure. Light sources 91 to 94 are provided on the back surface of the dial plate 601 corresponding to slightly outside the above-described numerals, and emit light to the back surface at a distance from the back surface. The pair of light sources 91 and 92 are arranged at positions corresponding to substantially the center line of the dial 601. Further, another pair of light sources 9
Reference numerals 3 and 94 are arranged substantially parallel to and apart from the line connecting the pair of light sources 91 and 92. In such a configuration, since each of the light sources 91 to 94 is arranged so as to be deviated toward the upper half of the dial 601 according to the number indicating the traveling speed, illumination of the dial 601 is performed in S1. A bright part shown in FIG. 2 and a dark part shown by W1 occur.

The reason will be described with reference to FIG. For example, considering only one light source 91, the further away from the light source 91, the weaker the illumination by the light source 91. That is, in the figure, the intensity becomes weaker in the order of R1, R2, and R3. Since the same can be said for the light sources 92, 93, and 94, the illumination in the vicinity and the direction of the light sources 91 to 94 becomes relatively strong. For example, in the figure, the position of “km / h” is
Although the distance from 1 to 94 is far, each light source 91 to 94
Since the light from 94 is added, the illumination at this “km / h” position becomes bright. On the other hand, the position of “0” indicates that each light source 9
1 to 94, and the amount of light added from each of the light sources 91 to 94 is small.

[0005] In addition, even in a horizontally long dial such as an odometer portion included in the above-mentioned combination meter, variations in illumination occur. This will be described with reference to FIG. FIG. 7 is an explanatory diagram showing variations in illumination in the odometer section. The dial 701 has a rectangular plate shape, and displays the accumulated traveling distance, which is commanded by a microcomputer mounted on the vehicle and accumulated in a predetermined storage unit, by a numeral. A light source 95 that is spaced apart from the rear surface and emits light to the rear surface is disposed on a substantially central rear surface on which the accumulated traveling distance of the dial 701 is displayed. In such a configuration, since the light source 95 is disposed on the back surface of the central portion of the dial 701 in correspondence with the display position of the accumulated traveling distance, the illumination of the dial 701 is performed by S2 near the light source 95. , And a dark part indicated by W2 away from the light source 95.

[0006]

As described above, since the light sources are arranged in consideration of space restrictions and the position of the display design formed on the dial, variations in illumination of the dial are caused. Prone to occur. For this reason, there was a problem that visibility deteriorated and appearance deteriorated.
In order to illuminate the dial in a well-balanced manner, it is conceivable to disperse a large number of light sources in a distributed manner. However, doing so may increase power consumption unnecessarily or may be difficult due to space restrictions.

SUMMARY OF THE INVENTION In view of the above situation, it is an object of the present invention to provide a vehicle-mounted meter in which the illumination balance of the dial is improved without increasing the number of light sources, and a method of manufacturing the vehicle-mounted meter.

[0008]

According to a first aspect of the present invention, there is provided an in-vehicle meter according to the first aspect of the present invention, comprising: a dial 601 having a predetermined display design; Around the outer edge of the dial 601, the dial 601 is arranged in a direction perpendicular to the dial 601 and away from the back surface of the dial 601.
A pair of light sources 91 and 92 for emitting light to the back surface, and design designating mechanisms 603 to 607 for designating the predetermined display design.
The dial plate 601 is manufactured by extruding in a certain extrusion direction and making the extrusion direction parallel to a line connecting the pair of light sources 91 and 92.
, And a diffusion plate 602 disposed between the light sources 91 and 92.

According to the first aspect of the present invention, the pair of light sources 91 and 92 are arranged near the outer edge of the dial 601 in a direction perpendicular to the dial 601 and separated from the back surface of the dial 601. Emit light on the back. A diffusion plate 60 is provided between the back surface of the dial 601 and the light sources 91 and 92.
2 are arranged. The diffusion plate 602 is manufactured by being extruded in a certain extrusion direction, and is arranged so that the extrusion direction is parallel to a line connecting the pair of light sources 91 and 92. Thus, the pair of light sources 9
1, 92 from the vicinity of the outer edge of the dial 601
01, and spaced apart from the back surface of the dial 601, and the diffusion plate 602 has a pair of light sources 9
By arranging the diffusion plate 602 so as to be parallel to the line connecting 1 and 92, light from the light sources 91 and 92 is effectively diffused. That is, since the diffusion plate 602 has the property of diffusing light perpendicularly to the pushing direction, the light from the pair of light sources 91 and 92 arranged on the back surface near the outer edge of the dial 601 is connected to a line connecting them. It is diffused in the vertical direction, and as a result, the dial 601 is illuminated in a well-balanced manner.

In order to solve the above-mentioned problem, the vehicle-mounted meter according to claim 2 is, as shown in FIG. 2, in the vehicle-mounted meter according to claim 1, wherein both the dial 601 and the diffusion plate 602 are disc-shaped. And the pair of light sources 91 and 92
Is disposed near the outer edge substantially on the center line of the dial 601, and another pair of light sources 93, which are disposed substantially parallel to and apart from a line connecting the pair of light sources 91 and 92,
94 is further provided.

According to the second aspect of the present invention, the dial 60 is provided.
1 and the diffusion plate 602 are both disk-shaped. The pair of light sources 91 and 92 are arranged near the outer edge of the dial 601 substantially on the center line of the dial 601. Further, another pair of light sources 93 and 94 are arranged substantially parallel to and apart from the line connecting the pair of light sources 91 and 92. Due to such an arrangement, light from each of the light sources 91 to 94 is A1 in FIG.
As shown by, the light is also diffused to the portion where the light sources 91 to 94 are not arranged (the lower half of the dial 601 in FIG. 2).

According to a third aspect of the present invention, there is provided an in-vehicle meter according to the third aspect, wherein the display design comprises the disk-shaped character. A plurality of numbers indicating a plurality of different traveling speeds formed inside the outer edge of the plate 601 near the outer edge. Pointer driving mechanism 60 for indicating one of the plurality of numbers
5, wherein the pair of light sources 91 and 92 and the other pair of light sources 93 and 94 are speedometers respectively arranged at positions slightly outside the plurality of numerals.

According to the third aspect of the present invention, the vehicle-mounted meter is a speedometer, and the display design is a plurality of numbers indicating a plurality of different traveling speeds formed inside the vicinity of the outer edge of the dial 601; The design instructing mechanism includes a pointer driving mechanism 605 that indicates one of a plurality of numbers by a pointer shaft 606 and a pointer 604 that penetrate through the center of the dial 601 and the diffusion plate 602. And a pair of light sources 91 and 9
The two and the other pair of light sources 93 and 94 are both arranged at positions corresponding to slightly outside a plurality of numbers. By arranging the light sources 91 to 94 at positions corresponding to slightly outside the plurality of numbers, the dial 601 is illuminated in a well-balanced manner and the numbers indicating the traveling speed are more clearly illuminated. Is done.

According to a fourth aspect of the present invention, there is provided an in-vehicle meter according to a fourth aspect of the present invention, comprising: a horizontally long dial 701 for displaying a predetermined design pattern; One light source 95 that is arranged at a distance and emits light on the back surface, and is manufactured by being extruded in a certain extrusion direction, and the extrusion direction is substantially perpendicular to the longitudinal direction of the dial 701. , A diffusion plate 702 disposed between the back surface of the dial 701 and the light source 95.

According to the fourth aspect of the invention, the dial plate 70
Reference numeral 1 denotes a horizontally long shape for displaying a predetermined design pattern. One light source 95 is arranged at a distance from the back surface of the dial 701, and emits light to this back surface. A diffusion plate 702 is arranged between the back surface of the dial 701 and the light source 95. The diffusion plate 702 is manufactured by being extruded in a certain extrusion direction, and the extrusion direction is substantially perpendicular to the longitudinal direction of the dial 701.
It is arranged between the back surface of the dial 701 and the light source 95. As described above, when the dial 701 has a horizontally long shape, the light from the light source 95 is arranged by setting the diffusion plate 702 so that the pushing direction is substantially perpendicular to the longitudinal direction of the dial 701. It will be spread effectively. That is, since the diffusion plate 702 has a property of diffusing light perpendicularly to the pushing direction, light from the light source 95 disposed on the back surface of the dial 701 diffuses in a direction parallel to the longitudinal direction of the dial 701. As a result, the dial 70
1 is illuminated in a well-balanced manner.

According to a fifth aspect of the present invention, there is provided an in-vehicle meter according to the fifth aspect, wherein the dial 701 and the diffusion plate 702 are both rectangular. The light source 95 is arranged at a position substantially corresponding to the center of the dial 701.

According to the fifth aspect of the invention, the dial plate 70
1 and the diffusion plate 702 are both rectangular in shape, and the light source 95 is arranged at a position substantially corresponding to the center of the dial 701. By arranging the light source 95 at a position substantially corresponding to the center of the dial 701, light from the light source 95 is directed in a direction parallel to the longitudinal direction of the dial 701 as indicated by A2 in FIG. As a result, the dial 701 is illuminated in a more balanced manner.

According to a sixth aspect of the present invention, there is provided a method of manufacturing an on-vehicle meter, wherein the dial has a translucent dial having a predetermined display design and is spaced apart from a back surface of the dial. A plurality of light sources, each of which is radiated to the back surface to illuminate the dial with a predetermined balance, are manufactured by being extruded in a certain extrusion direction. A method for manufacturing a vehicle-mounted meter having a diffusion plate disposed between the light source and the light source, the method including manufacturing the vehicle-mounted meter such that the extrusion direction and the arrangement of the light source always have a fixed positional relationship. Features.

According to the sixth aspect of the present invention, for a vehicle-mounted meter having a plurality of light sources arranged so as to illuminate the dial with a predetermined balance, the pushing direction and the arrangement of the light sources are always constant. Since the in-vehicle meters are manufactured in a positional relationship, the difference in illumination balance between the in-vehicle meters is reduced.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. First, a vehicle-mounted meter according to the present invention will be described with reference to FIG. FIG. 1 is a plan view showing an example of a vehicle-mounted meter according to the present invention.

As shown in FIG. 1, a vehicle-mounted meter according to the present invention is, for example, a combination meter 1. The combination meter 1 includes a fuel gauge section 2, a tachometer section 3, a warning display section 4, a direction indicating section 5, a speedometer section 6, an odometer section 7, a water temperature gauge section 8, and the like. Each of the parts 2 to 8 has a translucent dial for displaying a display design corresponding to each display content or a predetermined design pattern. Furthermore, a translucent surface glass that covers them is attached.

On the back side of each dial, a motor device for rotating the hands of the fuel gauge section 2, the tachometer section 3, the speedometer section 6 and the water temperature gauge section 8 by a predetermined angle instructed by a control mechanism (not shown). Are provided. Also, the odometer unit 7 is instructed by the control mechanism.
Also, a display device such as an LCD for displaying a predetermined cumulative traveling distance is provided. Further, on the back side, a plurality of light sources for supplying light to each of the dials, and a diffusion plate are provided between the dials and the light sources. These diffusion plates are formed by extrusion, and are arranged such that the extrusion direction and the light source have a predetermined positional relationship in order to efficiently illuminate the dial. The relationship between the diffusion plate, each dial and the light source is shown in FIGS.
Will be described again.

The fuel meter 2 indicates the remaining amount of fuel. The tachometer section 3 displays the engine speed. The warning display section 4 displays an alarm such as a shortage of oil or a lack of a seat belt. The direction instructing section 5 changes the traveling direction.

The speedometer section 6 displays the running speed. The driving mechanism in this regard will be briefly described. The traveling speed is indicated by the speedometer pointer indicating the corresponding traveling speed on the dial.
The pointer is controlled to rotate by a predetermined angle by the control mechanism and the pointer driving mechanism 605 based on a value corresponding to the traveling speed detected by a speed sensor (not shown). The odometer section 7 displays the accumulated traveling distance. The odometer unit 7 is instructed by a microcomputer mounted on the vehicle, and displays the accumulated traveling distance accumulated in a predetermined storage unit. The water temperature gauge section 8 displays the temperature of the engine cooling water. The driving mechanism of each of these parts 2 to 8 is known, and is not necessary for understanding the gist of the present invention, so that the description is omitted here.

Each of the dials of each of the parts 2 to 8 is illuminated by light supplied from a light source corresponding to each dial, triggered by switching timing of an ignition switch and switching timing of a headlight switch.

Next, a first embodiment of a vehicle-mounted meter according to the present invention will be described with reference to FIGS. 2 and 3 are a plan view and a cross-sectional view of a main part of a speedometer section, respectively, for describing a first embodiment of the vehicle-mounted meter of the present invention.

In the plan view of the main part shown in FIG.
Numeral 01 is a single disk-shaped sheet plate of transparent fabric made of, for example, a polycarbonate sheet. This dial 60
For example, black ink is applied to the display design 1 with the display design being hollow. This display design is a plurality of numbers, 20, 40,... Indicating a plurality of different traveling speeds formed near the outer periphery of the disk-shaped dial 601. Either of these numbers is indicated by a pointer not shown in this figure. Light sources 91 to 94 are provided on the back surface of the dial plate 601 corresponding to slightly outside the above-described numerals, and emit light to the back surface at a distance from the back surface.
The pair of light sources 91 and 92 are arranged at positions corresponding to substantially the center line of the dial 601. The other pair of light sources 93 and 94 are arranged substantially parallel to and apart from the line connecting the pair of light sources 91 and 92. And
A diffusion plate 602 is attached to the back of the dial 601. The diffusion plate 602 is a single sheet plate made of, for example, a polycarbonate sheet, which is slightly larger than the dial 601. Its thickness is about 0.5 mm. This diffusion plate 602 has a predetermined light transmittance and light diffusion rate. The diffusion plate 602 is manufactured by being extruded in a certain extrusion direction (indicated by an arrow X) shown in the figure, and the extrusion direction is a line connecting the pair of light sources 91 and 92 and another pair of light sources 93 and 93. It is overlaid on the dial 601 so as to be parallel to the line connecting 94.

The dial 601 and the diffusion plate 602 as described above.
The positional relationship between the light sources 91 to 94 becomes clearer with reference to FIG. As shown in the sectional view of the main part in FIG. 3, the diffusion plate 602 is attached to the back surface of the dial 601. The light sources 91 to 94 are pre-made bulbs, which are fixed to the base plate 603.
These light sources 91 to 94 and the diffusion plate 602 are separated by a predetermined distance. A motor device as a pointer driving mechanism 605 for rotating the pointer 604 is also fixed to the base plate 603. Pointer shaft 60 of motor device
Reference numeral 6 penetrates through the center of the dial 601 and the diffusion plate 602, and is attached to a pointer halo of the pointer 604. In addition, a pointer cap 607 is put on the base of the pointer 604. The hands 604 are made of a transparent material having a light-guiding property, and the back surface is colored by hot stamping or the like. Here, light is supplied from a predetermined light source (not shown) so that the hands shine. Pointer drive mechanism 60
5 is formed on the dial 601 by rotating the hands 604 by a predetermined angle by controlling the control mechanism and the hands driving mechanism 605 based on the value corresponding to the traveling speed detected by a speed sensor not shown here. The number indicating the traveling speed is indicated to inform the traveling speed. In addition,
Here, other circuits and structures arranged on the base plate 603 that are not necessary for understanding the gist of the present invention are omitted.

In such a configuration, when each of the light sources 91 to 94 is turned on by a predetermined trigger, these light sources 9 to 94 are turned on.
The light from the light sources 1 to 94 diffuses the light in the direction perpendicular to the direction in which the diffusion plate 602 is pushed out, and the light from the light sources 91 to 94 is combined, as shown in A1 in FIG. The entire dial 601 including the lower part of the dial 601 which is not arranged is illuminated with uniform brightness and good balance. That is, the pair of light sources 91 and 92 are
01, in the direction perpendicular to the dial 601 from near the outer edge,
The diffusion plate 6 is disposed apart from the back surface of the dial 601 and
Since the diffusion plate 602 is arranged so that the pushing direction of 02 is parallel to the line connecting the pair of light sources 91 and 92, the light from the light sources 91 and 92 is
Are diffused vertically to the line connecting. These light sources 9
The other pair of light sources 93 and 94 are arranged substantially parallel to and apart from the line connecting the light sources 1 and 92.
Light from the light sources 3 and 94 is also diffused in a direction perpendicular to the line connecting the light sources 93 and 94. Then, as shown by A1 in FIG. 2, the combined light is also diffused to a portion where the light sources 91 to 94 are not arranged (the lower half of the dial 601 in FIG. 2). As a result, the entire dial 601 is illuminated with uniform brightness and good balance. The dial 601 is illuminated in a very well-balanced manner by the small number of light sources 91 to 94 without arranging many light sources so that the light is evenly distributed over the entire dial, so that there is an effect of saving pace and energy. It can also be said.

Each of the light sources 91 to 94 is disposed at a position corresponding to a position slightly outside a plurality of numbers indicating the traveling speed. The effect is obtained that the plurality of numbers indicating are more clearly illuminated. Furthermore, the light source 9 near the lower half of the dial 601 to which no light source is assigned
The light sources 1 and 92 are arranged slightly apart from the outer edge of the dial 601, and the light sources 93 and 94 distant from them are arranged on the outer edge of the dial 601, so that the illumination balance is further improved. The present embodiment as described above is also effective for the tachometer section 3 having a disk-shaped dial, the fuel gauge section 2, and the water temperature gauge section 8 in addition to the speedometer section 6. When the diffusion plate 602 is layered on the dial 601,
Although it is advantageous in terms of the ease of production and the diffusion effect, the effects of the present invention can be obtained even if they are not necessarily layered.

Further, a second embodiment of the in-vehicle meter according to the present invention will be described by taking an odometer section as an example in FIG. FIG. 4 is a plan view of a main part of the odometer section 7 for explaining a second embodiment of the vehicle-mounted meter according to the present invention. The dial 701 is in the shape of a rectangular plate, and displays the accumulated travel distance accumulated in a predetermined storage means by a number instructed by a microcomputer mounted on the vehicle. A light source 95 that emits light to the rear surface of the dial 701 at a distance from the rear surface is disposed substantially at the center of the dial 701. And the dial 7
A diffusion plate 702 is layered on the back surface of the light emitting device 01. The diffusion plate 702 is a single sheet plate made of, for example, a polycarbonate sheet having a rectangular shape slightly larger than the dial 701. Its thickness is about 0.5 mm. This diffusion plate 702 has a predetermined light transmittance and light diffusion rate. The diffusion plate 702 is manufactured by extrusion molding in a certain extrusion direction (indicated by an arrow Y) shown in the figure, and the extrusion direction is set to be substantially perpendicular to the long side of the dial 701. 701.

In such a configuration, when the light source 95 is turned on by a predetermined trigger, the light from the light source 95 is diffused in the direction perpendicular to the direction in which the diffusion plate 702 is pushed out, as shown by A2 in FIG. As described above, the entire dial 701 including the left and right ends of the dial 701 where no light source is disposed is illuminated with uniform brightness and good balance.
That is, when the dial 701 has a horizontally long shape, the light from the light source 95 can be transmitted by arranging the diffusion plate 702 such that the pushing direction is substantially perpendicular to the longitudinal direction of the dial 701. The light source parallel to the longitudinal direction of the light source 701 is diffused in the unassigned left and right direction, and
The dial 701 is illuminated in a well-balanced manner. The present embodiment as described above can be applied to any display unit having a similar dial shape and light source arrangement other than the odometer unit 7.

For a vehicle-mounted meter having a plurality of light sources arranged so as to illuminate the dial with a predetermined balance, the extruding direction and the arrangement of the light sources are always in a fixed positional relationship. When an on-vehicle meter is manufactured, a difference in illumination balance between each on-vehicle meter is reduced. That is, by utilizing the characteristic of light diffusion in the extrusion direction, it is possible to reduce the difference in illumination balance between products.

[0034]

As described above, according to the first aspect of the present invention, the pair of light sources 91 and 92 are moved from the vicinity of the outer edge of the dial 601 in a direction perpendicular to the dial 601 so as to be perpendicular to the dial 601.
01 and the light source 91, 92 by arranging the diffusion plate 602 so that the pushing direction of the diffusion plate 602 is parallel to the line connecting the pair of light sources 91, 92. Light from the light source is effectively diffused. That is, since the diffusion plate 602 has the property of diffusing light perpendicular to the direction of extrusion,
A pair of light sources 91 and 92 arranged on the back surface near the outer edge of the light source 1
Is diffused in a direction perpendicular to the line connecting them, and as a result, the dial 601 is illuminated in a well-balanced manner.

According to the second aspect of the present invention, the pair of light sources 91 and 92 are arranged on the dial 60 substantially on the center line of the dial 601.
1 near the outer edge, and furthermore, a pair of these light sources 91, 9
A pair of light sources 9 substantially parallel to and separated from the line connecting
By arranging the light sources 91 and 94, the light from the light sources 91 to 94 is directed to a portion where the light sources 91 to 94 are not arranged (the lower half of the dial 601 in FIG. 2) as shown by A1 in FIG. Is also spread. As a result, a small number of light sources 91-94 can be used without arranging many light sources for lighting balance.
As a result, the dial 601 is illuminated in a very well-balanced manner.

According to the third aspect of the present invention, each light source 91
By arranging the numbers 94 to 94 at positions slightly outside the plurality of numbers, in addition to the well-balanced dial lighting effect obtained by the invention of claims 1 and 2, a plurality of numbers indicating the traveling speed can be obtained. An on-board meter, in particular a speedometer, having the effect of being more clearly illuminated is obtained.

According to the fourth aspect of the present invention, the dial 70
When 1 has a horizontally long shape, the pushing direction is the dial 7.
01 so as to be substantially perpendicular to the longitudinal direction of the diffusion plate 7.
By arranging 02, the light from the light source 95 is effectively diffused. That is, since the diffusion plate 702 has a property of diffusing light perpendicularly to the pushing direction, light from the light source 95 disposed on the back surface of the dial 701 diffuses in a direction parallel to the longitudinal direction of the dial 701. As a result, the dial 701 is illuminated in a well-balanced manner.

According to the fifth aspect of the present invention, the dial 70
1 and the diffusion plate 702 are both rectangular in shape, and the light source 95 is arranged at a position substantially corresponding to the center of the dial 701. By arranging the light source 95 at a position substantially corresponding to the center of the dial 701, light from the light source 95 is directed in a direction parallel to the longitudinal direction of the dial 701 as indicated by A2 in FIG. As a result, the dial 701 is illuminated in a more balanced manner.

According to the sixth aspect of the present invention, for a vehicle-mounted meter having a plurality of light sources arranged to illuminate the dial with a predetermined balance, the pushing direction and the arrangement of the light sources are always constant. Since the in-vehicle meters are manufactured in a positional relationship, the difference in illumination balance between the in-vehicle meters is reduced. That is, by utilizing the characteristic of light diffusion in the extrusion direction, it is possible to reduce the difference in illumination balance between products.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a vehicle-mounted meter according to the present invention.

FIG. 2 is a plan view of a main part of a speedometer for describing a first embodiment of the vehicle-mounted meter according to the present invention.

FIG. 3 is a cross-sectional view of a main part of a speedometer for describing a first embodiment of the vehicle-mounted meter according to the present invention.

FIG. 4 is a plan view of a main part of an odometer section for explaining a second embodiment of the vehicle-mounted meter according to the present invention.

FIG. 5 is an explanatory diagram showing variations in illumination in a speedometer section.

FIG. 6 is an explanatory diagram showing a principle of variation of the illumination shown in FIG.

FIG. 7 is an explanatory diagram showing variations in illumination in the odometer section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combination meter 2 Fuel gauge part 3 Tachometer part 4 Warning display part 5 Direction indication part 6 Speedometer part 7 Odometer part 8 Water temperature gauge part 91-95 Light source 601, 701 Dial 602, 702 Diffusion plate 603 Base plate (design indication mechanism) 604 pointer (design indicating mechanism) 605 pointer driving mechanism (design indicating mechanism) 606 pointer shaft (design indicating mechanism) 607 pointer cap (design indicating mechanism)

Claims (6)

[Claims] 1. A dial on which a predetermined display design is formed, and from near the outer edge of the dial, in a direction perpendicular to the dial,
A pair of light sources that are arranged separately from the back surface of the dial and emit light to the back surface, a design designating mechanism that designates the predetermined display design, and are manufactured by being extruded in a certain extrusion direction. An on-vehicle meter, comprising: a diffuser disposed between the back surface of the dial and the light source so that a direction is parallel to a line connecting the pair of light sources. 2. The in-vehicle meter according to claim 1, wherein the dial and the diffusion plate are both disk-shaped, and the pair of light sources are disposed near the outer edge on a substantially center line of the dial. The on-vehicle meter further comprises another pair of light sources arranged substantially parallel to and separated from a line connecting the pair of light sources. 3. The in-vehicle meter according to claim 2, wherein the display design is a plurality of numbers indicating a plurality of different traveling speeds formed inside the vicinity of an outer edge of the disk-shaped dial, and the design instruction is provided. The mechanism includes a pointer driving mechanism that indicates one of the plurality of numbers by a pointer shaft and a pointer penetrating the center of the dial and the diffusion plate, and the pair of light sources and the other pair of light sources are both An in-vehicle meter, which is a speedometer disposed at a position corresponding to a slightly outside of the plurality of numerals. 4. A horizontally long dial which displays a predetermined design pattern, one light source which is arranged at a distance from the rear surface of the dial and emits light on the rear surface, and is extruded in a constant extrusion direction. And a diffusing plate disposed between the back surface of the dial and the light source so that the direction of extrusion is substantially perpendicular to the longitudinal direction of the dial. In-vehicle meter. 5. The on-vehicle meter according to claim 4, wherein the dial and the diffusion plate are both rectangular, and the light source is disposed at a position corresponding to a substantially central portion of the dial. On-board meter. 6. A translucent dial having a predetermined display design, and a dial disposed apart from the rear surface of the dial, emitting light on the rear surface to illuminate the dial with a predetermined balance. A plurality of light sources respectively arranged so as to be extruded and manufactured in a certain extrusion direction, and a method of manufacturing a vehicle-mounted meter having a diffusion plate disposed between the back surface of the dial and the light source. A method for manufacturing a vehicle-mounted meter, wherein the vehicle-mounted meter is manufactured such that the pushing direction and the arrangement of the light source are always in a fixed positional relationship.