JP6753249B2 - Instrument device - Google Patents

Description

The present invention relates to an instrument device.

Conventionally, instrument devices that show vehicle information such as vehicle speed and engine speed have been known. Further, for example, as in the instrument device disclosed in Patent Document 1, an integrated instrument in which a digital display unit that displays vehicle information by an organic EL and an analog display unit that displays vehicle information by a pointer are integrated. The device is also known.

Japanese Unexamined Patent Publication No. 2005-239021

As an example of the integrated instrument device, as shown in FIG. 5B, a configuration including a digital display unit 200 for displaying a pointer and an analog display unit 300 for displaying a scale with respect to the pointer is being studied. .. In this configuration, the digital display unit 200 and the analog display unit 300 tend to be close to each other. Under such design restrictions, as shown in FIG. 5A, a plurality of parts 120, 130 having different colors may be present on the back surface of the light guide body 110 shown by the broken line. The component 120 is a display unit including, for example, a display unit 400 such as a liquid crystal panel, and a holding plate 500 located on the back surface of the light guide body 110 and fixing the display unit 400. The component 130 is, for example, a substrate on which a light source 150 or the like is mounted. In order to facilitate the distinction, the component 120 is shaded and the component 130 is shown in white. The light guide body 110 receives the light from the light source 150 and causes the scale portion 140 to emit light. In this case, it is inconspicuous when the light source 150 is turned on, but as illustrated in FIG. 5B, when the light source 150 is turned off, the colors of the plurality of parts 120 and 130 behind the light source 150 pass through the light guide body 110 to the scale portion 140. It may be visible from. Therefore, the colors are not uniform as in the scale portions 140a and 140b, and the design of the instrument device is deteriorated.

The present invention has been made in view of the above problems, and an object of the present invention is to enhance the design of the instrument device.

In order to achieve the above object, the instrument device according to the first aspect of the present invention is
With the board
A light source mounted on the substrate and emitting light,
A light guide body that receives the light from the light source, guides the light, and emits light from a plurality of emitting portions to light the emitting portion.
Equipped with a display unit that displays information,
The plurality of emitting portions of the light guide body face the substrate and the display unit.
The substrate and the display unit are set to have the same color in a range facing the exit portion.
It is characterized by that.

Further, in order to achieve the above object, the instrument device according to the second aspect of the present invention is
With the board
A light source mounted on the substrate and emitting light,
A light guide body that receives the light from the light source, guides the light, and emits light from a plurality of emitting portions to light the emitting portion.
A display unit that displays information and
A background member facing the light guide body is provided.
The plurality of emitting portions of the light guide body face the background member and the display unit.
The background member is located between the substrate and the light guide, and has the same color as a portion of the display unit facing the light guide.
It is characterized by that.

According to the present invention, the design of the instrument device can be enhanced.

(A) is a diagram showing a structure of an instrument device showing an embodiment of the present invention, and (b) is a structure of an instrument device in a state where the dial and the light guide body for the dial in the figure (a) are removed. The figure which shows. A side sectional view of the II-II cross section of FIG. 1 (a). The perspective view of the instrument device of the same embodiment. (A) is a view showing the structure of the instrument device in another embodiment of the present invention, and (b) is a side sectional view of the IVb-IVb cross section of FIG. It is a plan view of a conventional instrument device, (a) is a plan view in a state where a dial and a light guide body are removed, and (b) is a plan view in a state where a dial and a light guide body are arranged.

Hereinafter, embodiments in which the present invention is applied to an in-vehicle instrument for displaying the vehicle speed of a vehicle will be described with reference to the accompanying drawings.

As shown in FIGS. 1 (a), 1 (b), 2 and 3, the in-vehicle instrument (instrument device) 100 includes a dial 10, a light guide body (light guide body) 20 for a dial, and a display unit. It includes 30, a cell case 40, a substrate 50, and a light source 60. The in-vehicle instrument 100 is a speedometer.

In the following description, when the vehicle-mounted instrument 100 is viewed from the front, the visual side when the user confirms the measured value or the like when the vehicle-mounted instrument 100 is viewed from the front is referred to as “front”, and the back side is referred to as “back”.

The dial 10 is made of a resin material such as PC (Polycarbonate) and has a substantially semicircular shape in a plan view. As shown in FIG. 1A, the dial 10 is provided with an index portion 11 arranged along an arc on its surface. In the index unit 11, the vehicle speed, which is the referent of the in-vehicle instrument 100, is indicated in, for example, in increments of 10 km / h. In the drawing, the notation of the numerical value is omitted, and the index part 11 which is the notation range of the numerical value is shown by a broken line. A plurality of first scale holes 12a are arranged on the outer peripheral side of the index unit 11. Further, a second scale hole 12b is provided on the inner peripheral side of the index unit 11. The plurality of first scale holes 12a and the second scale holes 12b are arranged along an arc, respectively, like the index unit 11.

The dial light guide 20 (light guide) is made of a translucent resin such as PMMA (Poly Methy Methacrylate), and guides the light emitted from the light source 60 to the dial 10. Specifically, as shown in the cross section of FIG. 2, the main body of the light guide body 20 for a dial is arranged on the back surface of the dial 10, and the end portion (light receiving portion) 22 is mounted on the substrate 50. It extends to a position facing the plurality of light sources 60. The main body of the dial light guide 20 has a substantially semicircular ring shape in a plan view, and faces almost the entire back surface of the dial 10.
As shown in FIGS. 2 and 3, on one surface of the main body of the dial light guide body 20, a plurality of first exit portions (1) that fit into the plurality of first scale holes 12a formed in the dial 10 ( The exiting portion) 21a and a plurality of second emitting portions 21b fitted in the plurality of second scale holes 12b are formed. The first emitting portion 21a and the second emitting portion 21b are each formed in a rectangular shape in a side view as shown in FIG. 2 and in a wedge shape in a plan view as shown in FIG.
The dial light guide 20 receives the light emitted from the light source 60a at the end (light receiving unit) 22 to guide the light, and emits the light from the first emission unit 21a and the second emission unit 21b. As a result, when the light source 60a is turned on, each numerical value displayed on the index unit 11 is sandwiched between the first emitting units 21a and 21b that emit light, and is displayed in an easy-to-see manner.

The display unit 30 includes a liquid crystal display panel 31 (display unit), a light guide body 32 for the liquid crystal display panel, and a holding plate 33. The liquid crystal display panel 31 is composed of a segment type liquid crystal display element.
As shown in FIGS. 2 and 3, the upper end of the liquid crystal display panel 31 overlaps all the second emission portions 21b of the dial light guide body 20.
As shown in FIG. 3, the liquid crystal display panel 31 indicates a plurality of combinations of the second emitting unit 21b arranged radially, the numerical value indicated on the index unit 11, and the first emitting unit 21a. It has a pointer display unit for displaying the liquid crystal pointer 34.
Further, the liquid crystal display panel 31 includes a numerical value display unit 35 that displays a numerical value indicating the speed at the lower part of the pointer display unit. The numerical display unit 35 has, for example, a segment for two digits and digitally displays the vehicle speed.

The light guide body 32 for a liquid crystal display panel is made of a translucent resin such as PMMA, and has a light receiving unit 32a and an emitting unit 32b for the liquid crystal display panel as shown in FIG. The light receiving unit 32a faces the light source 60 arranged on the substrate 50 and incidents the light from the light source 60. The liquid crystal display panel emitting unit 32b is arranged on the back side of the liquid crystal display panel 31. The light guide body 32 for a liquid crystal display panel receives light from a light source 60 at a light receiving unit 32a due to an edge light structure, guides the light, and emits the light from an exit unit 32b for a liquid crystal display panel. 31 is transmitted and illuminated.
As shown in FIGS. 2 and 3, the holding plate 33 has a function of supporting the light guide body 20 for a dial from the back surface, while holding the liquid crystal display panel 31 toward the substrate 50 side. The holding plate 33 is formed of a steel plate or the like in a frame shape surrounding the outer periphery of the liquid crystal display panel 31, and is fixed to the substrate 50 in a state where the cell case 40 is held from the side surface thereof. Further, the holding plate 33 is located at the center of all the first emitting portions 21a on the liquid crystal display panel 31, and in this example, the eight first emitting portions 21a (that is, three on each end side, for a total of six thirds). It is formed in a shape facing the eight first emitting portions 21a (points indicated by broken lines in FIG. 1B) excluding the one emitting portion 21a. The holding plate 33 is made of a conductive material (metal material). The holding plate 33 is surface-treated in black or has a coating such as a black cutting sheet.

The cell case 40 is made of a resin material such as PP (Polypropylene), is attached to the substrate 50 as shown in FIG. 2, and has a light guide body 32 for a liquid crystal display panel so that the light receiving portion 32a faces the light source 60. Store.

The substrate 50 is composed of, for example, a rigid printed circuit board in which a copper foil wiring pattern is applied to a substrate made of an epoxy-based resin material. Various electronic components for driving the liquid crystal display panel 31, the light guide 20 for the dial, and the light sources 60a and 60b that emit light to the light guide 32 for the liquid crystal display panel are mounted on the substrate 50.

As shown in FIG. 1B, of the substrate 50, at least the light guide body back surface portion 51 formed over a range facing the first emission portion 21a and the second emission portion 21b of the dial light guide body 20 , The coating of the substrate 50 painted or printed in the same black color as the holding plate 33. Alternatively, the light guide body back surface portion 51 may be coated with a black cutting sheet or the like. In this example, the light guide body back surface portion 51 has a substantially semicircular shape so as to include the first emission portion 21a and the second emission portion 21b in the front view.

The light source 60a is composed of an LED or the like, and as shown in FIG. 2, faces the light receiving portion 22 of the light guide body 20 for the dial, and the light source 60b faces the light receiving portion 32a of the light guide body 32 for the liquid crystal display panel. It is mounted on the front side of the substrate 50 as described above.
As shown in FIG. 1B, the light sources 60a for the light guide body 20 for the dial are arranged at equal intervals on the circumference of a virtual circle centered on the axis of the virtual rotation axis of the liquid crystal pointer 34. A plurality of pointers 34 are arranged corresponding to the rotation range of the pointer 34. The light receiving unit 22 is formed in a shape facing the plurality of light sources 60a.
The light source 60b for the light guide 32 for the liquid crystal display panel is centered on the axis of the rotation axis of the liquid crystal pointer 34, and is arranged at equal intervals on the circumference of a virtual circle having a diameter smaller than that of the light source 60a. Multiple are arranged corresponding to. The light receiving portion 32a is formed in a shape facing the plurality of light sources 60b.

Next, the operation of the instrument device 100 having the above configuration will be described.
When the ignition is turned on, the light source 60a lights up. A part of the light emitted by the light source 60a is incident on the light receiving portion 22 of the light guide body 20 for the dial, guided in the light guide 20 for the dial, and is guided in the first emission portion 21a and the second emission portion 21b. Emit from.
Similarly, the light source 60b is turned on. A part of the light emitted by the light source 60b enters the light receiving portion 32a of the light guide body 32 for the liquid crystal panel, is guided inside the light guide 32 for the liquid crystal panel, and is guided from the exit portion 32b for the liquid crystal display panel to the liquid crystal display panel. Illuminate 31 from the back.
The drive circuit (not shown) of the liquid crystal display panel 31 displays the liquid crystal pointer 34 according to the speed to be displayed, and causes the liquid crystal pointer 34 and the numerical value displayed on the index unit 11 instructed by the liquid crystal pointer 34 to be compared and read. This informs the user of the speed. Further, the speed is indicated by displaying a numerical value indicating the speed on the numerical display unit 35.
When the light source 60a is lit, the colors of the first emission unit 21a and the second emission unit 21b are the same as the color of the emission light guided from the light source 60a.
On the other hand, when the ignition is turned off, both the light sources 60a and 60b are turned off.
In this state, a part of the first emitting portion 21a (that is, the above-mentioned eight first emitting portions 21a) is displayed through the color of the holding plate 33 on the back surface thereof. On the other hand, the light guide of the substrate 50 is on the back surface of the rest of the first exit 21a (that is, a total of six first exits 21a on both ends excluding the eight first exits 21a described above). The back surface portion 51 of the body is arranged.
Therefore, a part of the first emitting portion 21a and the second emitting portion 21b is displayed in the color of the holding plate 33, and the rest is displayed in the color of the light guide body back surface portion 51. However, since the holding plate 33 and the light guide body back surface portion 51 have the same color, all the first emitting portions 21a are displayed in the same color. Therefore, the design of the dial 10 when the light source is turned off is enhanced.

The present invention is not limited to the above-described embodiment, and various improvements and design changes can be made without departing from the gist of the present invention.

For example, in the above embodiment, the holding plate 33 and the light guide body back surface portion 51 have the same color, but there may be a color difference to the extent that the user does not feel a sense of discomfort. Therefore, the colors of the holding plate 33 and the back surface portion 51 of the light guide may be similar colors. Therefore, in the present specification, the fact that the holding plate 33 and the light guide body back surface portion 51 have the same color includes the case where they have the same color.

The light guide body back surface 51 may be integrated with the substrate 50, or may be a separate component (background member) that can be attached to and detached from the substrate 50. Alternatively, the light guide body back surface portion 51 may be a separate component from the substrate 50 and may be arranged at an arbitrary position between the substrate 50 and the dial light guide body 20. When the light guide body back surface 51 is a separate component from the substrate 50, it is made of a resin material such as PP (Polypropylene), and has a black coating on the front side thereof.

In the above embodiment, the holding plate 33 faces the first emitting portion 21a, but in addition to the holding plate 33, the liquid crystal display panel 31 and other parts constituting the display unit 30 face the first emitting portion 21a. You may be doing it. In this case, of the front side of the component facing the first emitting portion 21a, at least the range facing the first emitting portion 21a is the same color as the back surface portion 51 of the light guide body.

The light guide body 20 for a dial may include an emission unit (not shown) that is not branched into a first emission unit 21a and a second emission unit 21b. In this case, the emitting unit may be located on the outer peripheral side of the index unit 11 or may be located on the inner peripheral side of the index unit 11.

Further, the light source of the liquid crystal display panel 31 may have a direct structure instead of the edge light structure. A self-luminous display device such as an organic EL panel can also be applied to the liquid crystal display panel 31. In this case, it is not necessary to provide the light source 60b and the light guide body 32 for the liquid crystal display panel.

The liquid crystal display panel 31 may be of a dot matrix type.

Further, in the above embodiment, the liquid crystal pointer 34 is used to indicate the index unit 11, but as shown in FIG. 4A, it is configured as a structure instead of the liquid crystal pointer 34 displayed as an image. The entity pointer 34a may be arranged. In this case, a display unit including a pointer, a motor, or the like may be arranged instead of the display unit 30 including the liquid crystal display panel 31 or the like.
Further, at this time, the display unit 30 including the liquid crystal display panel 31 and the like may be left, and the display unit including the pointer, the motor and the like may be newly provided. Specifically, as shown in FIG. 4B, the physical pointer 34a has, for example, a rotation center portion 34b which is a rotation center and a support portion 34c having a U-shaped cross section protruding in the radial direction from the rotation center portion 34b. Also prepare. The body pointer 34a is rotationally driven with respect to the first exit portion 21a, the second exit portion 21b, and the index portion 11 by rotationally driving the rotation center portion 34b by a stepping motor which is a drive unit (not shown).

Further, in the above embodiment, the holding plate 33 of the display unit 30 is located on the back surface of the light guide body 20, but the liquid crystal display panel 31 of the display unit 30 may be located. The liquid crystal display panel 31 turns black when the light source 60a is turned off.

The instrument device of the present invention is suitable for a meter mounted on a moving body such as an automobile, a motorcycle, an agricultural machine, a construction machine, and a ship.

100 In-vehicle instrument (instrument device)
10 Dial 11 Indicator 12a 1st scale hole 12b 2nd scale hole 20 Light guide for dial (light guide)
21a First exit part (outlet part)
21b Second emission unit 22 Light receiving unit 30 Display unit 31 Liquid crystal display panel (display unit)
32 Light guide for liquid crystal display panel 33 Suppressor 34 Liquid crystal pointer 40 Cell case 50 Substrate 51 Light guide back surface 60a, 60b Light source (LED)

Claims (5)

With the board
A light source mounted on the substrate and emitting light,
A light guide body that receives the light from the light source, guides the light, and emits light from a plurality of emitting portions to light the emitting portion.
Equipped with a display unit that displays information,
The plurality of emitting portions of the light guide body face the substrate and the display unit.
The substrate and the display unit are set to have the same color in a range facing the exit portion.
An instrument device characterized by that. With the board
A light source mounted on the substrate and emitting light,
A light guide body that receives the light from the light source, guides the light, and emits light from a plurality of emitting portions to light the emitting portion.
A display unit that displays information and
A background member facing the light guide body is provided.
The plurality of emitting portions of the light guide body face the background member and the display unit.
The background member is located between the substrate and the light guide, and has the same color as a portion of the display unit facing the light guide.
An instrument device characterized by that. The substrate is
A coating having the same color as the display unit is provided in a range facing the exit portion of the light guide body.
The instrument device according to claim 1. The background member is
A coating having the same color as the display unit is provided in a range facing the exit portion of the light guide body.
2. The instrument device according to claim 2. The display unit is
It is provided with a display unit, a holding plate located between the display unit and the light guide body, and a holding plate for fixing the display unit to the substrate.
The holding plate is
In the range of the light guide body facing the exit portion, the color is set to be the same as the range of the light guide body of the substrate facing the exit portion.
The instrument device according to any one of claims 1 to 4, characterized in that.

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