JP2009115703A - Meter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a meter device capable of preventing a light from being leaked in a projected member integrated with a displaying member, capable of eliminating a limitation of an installation position for the projected member, and capable of preventing the displaying member from being backlashed and design from being shifted. <P>SOLUTION: This meter device is provided with the resin displaying member 20b arranged along a moving range of a pointer to be supported by a housing, and formed, on its surface, with a display part for light emission display of transmitting a light of a light source guided from a backface side, a light shielding layer 206 provided in a reverse face side of the displaying member 20b, having a light shieldability of preventing the light advanced into an inside of the displaying member 20b from being transmitted to the reverse face side, and formed integrally with the displaying member 20b, and an engaging claw 207 projected from the light shielding layer 206 along a reverse face direction of the displaying member 20b, having a function for fixing the displaying member 20b onto the housing, and formed integrally with the light shielding layer 206. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a meter device provided with a display member such as a dial plate or a decoration member, which is used in an automobile or the like and has a display unit for performing translucent display.

Conventionally, as a technique for fixing a display member that performs translucent display to a housing, for example, as described in Patent Document 1, a claw portion of a fixing pin that protrudes from the display member toward the back side of a meter is used as a character. A technique for engaging and fixing the frame on the back surface of the plate is disclosed.
JP 2006-300355 A

However, in the technique described in Patent Document 1 described above, since the fixing pin is formed integrally with the display member having translucency, the light that has entered the display member at the time of light-emitting display is displayed. A part of the light leaks through the fixing pin to the back side of the dial.
Therefore, when viewed from the front side of the meter, the portion where the fixing pin is provided has less light emission than the surrounding portion, causing light emission unevenness, or light leakage from the fixing pin. There is a possibility that display quality may be deteriorated by being visible from the front side of the meter. Furthermore, when measures are taken to prevent this light leakage from being seen from the front side of the meter, there is a risk of increasing costs.
Therefore, in order to avoid such a problem, when the fixing pin is limited to a portion where the display unit for performing light emission display is not provided, for example, the turning angle of a pointer such as a speedometer is large. In the meter, there are few places where the fixing pins can be installed, and there is a risk that the display member will be rattled or the design may be shifted between the display member and the inside and outside of the display member.

  The present invention has been made by paying attention to the conventional problems as described above, and can prevent light leakage from occurring in the protruding member integral with the display member, and eliminates the restriction of the installation position of the protruding member. It is an object of the present invention to provide a meter device capable of preventing the display member from rattling or design deviation.

  In order to achieve the above-mentioned object, the present invention has a display unit that is arranged along the movement range of the pointer and is supported by a housing, and which transmits light from a light source guided from the back side to display light. A resin-made display member, and a light-shielding property that is provided on the back side of the display member and prevents light entering the inside of the display member from being transmitted to the back side, and the display member A resin-made light-shielding layer formed integrally, and protruding from the light-shielding layer toward the back surface of the display member, and having at least one of a function of fixing the display member to the housing and a function of positioning And a protruding member formed integrally with the light shielding layer.

  According to a second aspect of the present invention, in the meter device according to the first aspect, the light shielding layer is provided on an outer peripheral edge of the back surface of the display member, and is engaged with the housing as the protruding member. The meter device is characterized in that a plurality of engaging members for fixing the display member to the housing are provided so as to surround the display member circumferentially.

  According to a third aspect of the present invention, in the meter device according to the first or second aspect, the light shielding layer reflects the light that has entered the display member toward the display unit. The meter device is characterized by having an inclined surface.

In the meter device according to the present invention, when the light enters the display member from the light source, the light shielding layer prevents the light from traveling in the direction of the projecting member, so light leakage from the projecting member integral with the light shielding layer is prevented. Is prevented.
Therefore, it is possible to prevent the occurrence of light emission unevenness in the display unit due to light leakage from the protruding member, and it is possible to prevent the light leakage from being seen from the front of the meter, and it is not necessary to take countermeasures.
Therefore, there is no restriction on the installation position where the projecting member is provided away from the display unit, and the projecting member is optimally arranged to prevent the display member from rattling or design deviation.

  Furthermore, in the invention according to claim 2, since the light shielding layer is provided on the outer peripheral edge portion of the display member and the plurality of engagement members are provided so as to surround the display member in a circumferential shape, the engagement member is provided as the display member. Compared with what is arrange | positioned in the middle of this, the rattling prevention of the member for a display can be performed more effectively.

  In the invention according to claim 3, since the light shielding layer includes an inclined surface that reflects light toward the display unit, the light from the light source is reflected toward the display unit, and the display unit emits light efficiently. Can be displayed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The meter device of this embodiment is arranged along the movement range of the pointers (12a, 12b, 12c, 12d), is supported by the housing (14), and transmits light from the light source (24) guided from the back side. (20a, 20b, 20c) made of resin having a display portion for light emission display formed on the surface, and provided on the back side of the (20a, 20b, 20c), and the inside of the (20a, 20b, 20c) A light shielding layer (206) made of a resin integrally formed with the (20a, 20b, 20c) and the light shielding layer (20a). , 20b, 20c) projecting in the direction of the back surface, having at least one of a function of fixing (20a, 20b, 20c) to the housing (14) and a function of positioning, and being formed integrally with the light shielding layer The A protruding member (207, 208, 209), a meter device which is characterized in that it comprises.

  Below, based on FIGS. 1-9, the meter apparatus of Example 1 of the best embodiment of this invention is demonstrated.

  The meter device A according to the first embodiment is installed in a meter cluster provided on an instrument panel of an automobile not shown, and as shown in FIG. 2, a speedometer 1, an engine speed meter 2, a fuel meter. 3. A water temperature meter 4 is provided.

  As shown in FIG. 3, the meter device A according to the first embodiment includes a meter cover 11, movements 12 a, 12 b, 12 c, and 12 d, and a circuit board 13, which are disposed in order from the front of the vehicle, that is, from the back as viewed from the passenger. , Lower housing 14, filters 15a and 15b, liquid crystal display devices 16a and 16b, light guide plate 17, light cover 18, diffusion plate members 19a, 19b and 19c, display members 20a, 20b and 20c, hands 21a, 21b and 21c, 21d, an upper housing 22, and a front cover 23 are provided.

  The circuit board 13 is made of, for example, a laminated board in which a wiring pattern (not shown) is provided on a glass epoxy base material. The wiring pattern includes movements 12a, 12b, and 12c that drive the hands 21a, 21b, 21c, and 21d. 12d, a light emitting diode 24 as a light source for illumination, a circuit component 25 (see FIG. 4) for controlling driving thereof, and the like are electrically connected.

  The movements 12a, 12b, 12c, and 12d include a movable magnet type instrument and a stepping motor, and are arranged on the back side of the circuit board 13 as shown in FIG. The rotating shaft 12e raised from the movements 12a to 12d passes through the diffusing plate members 19a, 19b, and 19c, and hands 21a to 21d are attached to the tips thereof.

The circuit board 13 is fixed while being sandwiched between the meter cover 11 and the lower housing 14.
That is, with the circuit board 13 in contact with the back side of the lower housing 14, the meter cover 11 is placed on the back side of the circuit board 13, and the engaging claw that is formed integrally with the meter cover 11 and that is not shown. The circuit board 13 is fixed in a state of being sandwiched between the lower housing 14 and the meter cover 11.

  The lower housing 14 is covered with diffusion plate members 19a, 19b, and 19c in the meter front direction (the direction in which the meter device A directly faces and in the direction of arrow B in the figure).

The diffusion plate members 19a, 19b, and 19c are three of a diffusion plate member 19b for the speedometer 1, a diffusion plate member 19a for the engine speed meter 2, and a diffusion plate member 19c for the fuel meter 3 and the water temperature meter 4. Sheets are set.
Similarly, as the display members 20a, 20b, and 20c, the display member 20b for the speedometer 1, the display member 20a for the engine speed meter 2, and the display member 20c for the fuel meter 3 and the water temperature meter 4 are used. Are set.
These diffusion plate members 19a, 19b, and 19c and display members 20a, 20b, and 20c constitute dial plates of the meters 1, 2, 3, and 4, respectively.

The diffusion plate members 19a, 19b, and 19c are provided with a synthetic resin plate having translucency, and through holes 12h (see FIG. 4) are formed through the rotation shafts 12e of the movements 12a to 12d, respectively.
The diffusion plate members 19a to 19c are overlapped with display plates (not shown) on which numerical values and pictographs are printed on the front side. The display board is formed of a light-transmitting resin, the display portion is printed with a light-transmitting paint, and the portions other than the display portion are light-blocking, for example Painted with black or gray paint.

In addition, display members 20a, 20b, and 20c are superimposed on the surfaces of the diffusion plate members 19a, 19b, and 19c.
These display members 20a to 20c are formed with holes 20d, 20e, 20f, and 20g so as to be arranged along the rotation ranges of the hands 21a to 21d, respectively.

  The light guide plate 17 and the light cover 18 are formed in a shape surrounding the outer periphery of the diffusion plate members 19a, 19b, and 19c. As shown in FIGS. 4 and 9, the light guide plate 17 is sandwiched between the lower housing 14 and the light cover 18 while being accommodated in the recess 14 a of the lower housing 14. The light cover 18 is screwed to the lower housing 14 so as to cover the meter front direction side of the light guide plate 17.

  In addition, the light emitting diode 24 provided in the circuit board 13 is arrange | positioned in the position which overlaps with the display members 20a-20c and the light-guide plate 17 in the meter front direction, also as shown in FIG.

  The present invention is used to fix the display members 20a to 20c to the lower housing 14 together with the diffusion plate members 19a to 19c. However, since the structure is common, these are represented below. The display member 20b of the speedometer 1 will be described.

  As shown in FIG. 5, the display member 20b is made of a synthetic resin having translucency, as in the case of the diffusion plate members 19a, 19b, and 19c. As shown in FIG. 7, which is a cross-sectional view taken along line S7-S7 in FIG. And a projecting portion 203 that has a triangular cross section and projects in the meter front direction.

On the surface of the flat plate portion 201, there is provided a number display portion 204 on which speed display numbers are displayed in increments of 20 km / h.
On the other hand, the inclined surface 202 of the projecting portion 203 is provided with a scale display portion 205 with a constant interval for speed display. The scale display unit 205 includes a convex scale 205a, an intermediate scale 205b, and a general scale 205c.
The convex scale 205 a is arranged at a position overlapping the numerical display of the numerical display unit 204 in the radial direction, protrudes in the meter front direction from the inclined surface 202 of the protruding part 203, and from the general part of the protruding part 203. Is also projected in the outer diameter direction.
The intermediate scale 205b is arranged at the intermediate position in the circumferential direction of the convex scale 205a, and displays the speed in increments of 10 km / h, which is the middle of the speed displayed by the number display unit 204.
The general scale 205c performs speed display in increments of 2 km / h between the convex scale 205a and the intermediate scale 205b.

  On the surface of the display member 20b, the above-described number display portion 204 and scale display portion 205 are displayed by applying a transparent paint such as red or white, while the other portions are displayed. Is coated with a paint such as black or gray having a light shielding property.

Further, as shown in FIGS. 1 and 7, a light shielding layer 206 is provided on the outer peripheral edge of the back surface side of the display member 20b.
The light shielding layer 206 prevents light that has entered the display member 20b from traveling to the back surface side of the display member 20b, and is a resin having a light shielding property. The resin is formed into a substantially triangular cross section having an inclined surface 206a.
The inclined surface 206 a is formed upward facing the direction of the inclined surface 202 of the protrusion 203, and reflects the light that has entered the display member 20 b toward the inclined surface 202.

  Further, on the back surface side of the display member 20b, an engaging claw 207, a positioning pin 208, and an identification pin 209 as projecting members are formed so as to protrude in the back surface direction integrally with the light shielding layer 206. For the positioning pin 208 and the identification pin 209, see FIGS.

The engaging claw 207 is used to engage a claw portion 207a formed at the tip of the engaging claw 207 with the lower housing 14 and fix the display member 20b to the lower housing 14 together with the diffusion plate member 19b. 6 and 8, the display member 20 b is formed at six locations on the outer peripheral edge of the display member 20 b so as to surround the display member 20 b in the circumferential direction. These engaging claws 207 penetrate through the diffusion plate member 19b at a notch not shown formed on the outer periphery of the diffusion plate member 19b.
Each positioning pin 208 is inserted into a positioning hole (not shown) formed in the diffusion plate member 19b to position the display member 20b with respect to the diffusion plate member 19b. It is provided in two places.
Whether the identification pin 209 is inserted into an identification hole (not shown) formed in the diffusion plate member 19b when a plurality of combinations of the display member 20b and the diffusion plate member 19b are set. It is determined whether or not it matches the set combination depending on whether or not.

Next, the operation of the first embodiment will be described.
When the light emitting diode 24 emits light, as shown in FIG. 9, the light enters the diffuser plate member 19b and the display member 20b, is diffused inside, and has the translucency shown in FIG. The light is transmitted from 204 and 205 toward the front of the meter, and numbers and scales are emitted. At the same time, the light from the light emitting diode 24 is diffused by the light guide plate 17 and then enters the light cover 18 from the end face on the back side, causing the light cover 18 to emit light in a ring shape, thereby producing a stereoscopic effect. To do.

When the light emitting diode 24 emits light, the light that has entered the inside of the display member 20b travels to the engagement claw 207, the positioning pin 208, and the identification pin 209 in the back surface direction, and is blocked by the light shielding layer 206. The light is reflected by the inclined surface 206a of the light shielding layer 206 in the direction of the inclined surface 202 where the scale display unit 205 is provided.
Accordingly, in the display member 20b, light leakage caused by light entering the engaging claws 207, the positioning pins 208, and the identification pins 209 is prevented, and the engaging claws are viewed when the occupant views the meter device A from the front side. 207, the positioning pin 208, and the identification pin 209 can be prevented from causing uneven light emission, and light leakage due to these is not seen from the front side of the meter.

As described above, in the meter device A of the first embodiment, the resin light shielding layer 206 that prevents light from being transmitted to the back surface side of the display member 20b is provided on the back surface side of the display member 20b. An engaging claw 207, a positioning pin 208, and an identification pin 209 as projecting members provided on the outer peripheral edge portion and projecting from the display member 20b in the rear surface direction are formed integrally with the light shielding layer 206.
For this reason, the light that has entered the display member 20b does not leak from the engagement claws 207, the positioning pins 208, and the identification pins 209 toward the back surface, and the engagement claws 207, the positioning pins 208, the identification pins It is possible to prevent the portion where 209 is formed from causing insufficient light emission and uneven light emission or light leakage around it.
Therefore, in the display member 20b, the engaging claws 207, the positioning pins 208, the identification pins 209, and the like can be arranged at the positions where the respective display portions 204 and 205 are provided. Is arranged so as to surround the entire circumference of the display member 20b and can be firmly fixed to the lower housing 14, thereby preventing rattling of the display member 20b and the diffusion plate member 19b and preventing the occurrence of design deviation. it can.
Furthermore, by preventing light leakage by the engaging claw 207, the positioning pin 208, and the identification pin 209, it is not necessary to separately take measures to prevent the light leakage from being seen from the front side of the meter, thereby reducing the cost by simplifying the configuration. Can be planned.

In addition, since the light shielding layer 206 is formed with an inclined surface 206a that reflects light toward the inclined surface 202 provided with the scale display portion 205 of the projecting portion 203, compared to a case where the inclined surface 206a is not provided, The scale display unit 205 can display the light efficiently.
In addition, the light shielding layer 206 is easier to manufacture than the entire back surface of the display member 20b, and the cost can be reduced. Further, the engagement claw 207 for fixing the display member 20b is provided for display. The display member 20b and the diffusion plate member 19b can be effectively fixed by being arranged on the outer periphery of the member 20b.

  As mentioned above, although embodiment and Example 1 of this invention were explained in full detail with reference to drawings, specific structure is not restricted to this Embodiment and Example 1, and does not deviate from the summary of this invention. A degree of design change is included in the present invention.

  For example, in the first embodiment, the meter device A for a vehicle is shown, but the present invention can also be applied to devices other than vehicles such as ships and industrial equipment. In the first embodiment, the speedometer 1, the engine speed meter 2, the fuel meter 3, and the water temperature meter 4 are shown as the meters, and the speedometer 1 is representatively described as an application example of the present invention. The meter to which is applied is not limited to these meters, and can be applied to other meters.

  In the first embodiment, the display members 20a, 20b, and 20c, which are members that form the outer peripheral portion of the dial plate of the meter, are shown as the display member. However, the display member is not limited to this. In other words, as the display member, for example, a so-called dial plate in which the diffusion plate members 19a, 19b, and 19c and the display members 20a, 20b, and 20c shown in the first embodiment are integrated may be used. Alternatively, it can be used as a so-called decorative member that is provided in an annular shape only at the outer peripheral edge of the dial and produces a three-dimensional display of the dial.

  In the first embodiment, the example in which the light shielding layer 206 is formed in a substantially triangular cross-sectional shape is shown. However, the cross-sectional shape is not limited to a substantially triangular shape. For example, when the inclined surface 206a is not provided. Alternatively, it may be formed with a constant thickness. Alternatively, in Example 1, the light shielding layer 206 is provided on the outer peripheral edge of the back surface of the display member 20b. However, for example, the light shielding layer 206 may be provided on the entire back surface of the display member 20b other than the outer peripheral edge. Good.

  In the first embodiment, the engaging claws 207, the positioning pins 208, and the identification pins 209 are shown as the projecting members. However, as long as they are formed integrally with the display member through the diffusion plate member, Other than that.

In the first embodiment, the engaging claw 207 is shown as the engaging member of the protruding member. However, the engaging claw 207 is not limited to such an engaging claw 207. For example, the engaging claw 207 has elasticity as shown in FIG. The engaged member 101 may be used.
Further, the number and positions of the engaging members are not limited to the numbers and positions shown in the first embodiment.

It is sectional drawing which shows the principal part of the member 20b for a display in the meter apparatus A of Example 1 of the best embodiment of this invention, Comprising: The cut surface in the S1-S1 line | wire of FIG. 6 is shown. It is a front view of the meter apparatus A of Example 1. FIG. 1 is an exploded perspective view of a meter device A according to Embodiment 1. FIG. It is a transverse cross section of meter device A of Example 1, and shows the state where it cut by line S4-S4 of FIG. It is a front view of the member 20b for a display used for the meter apparatus A of Example 1. FIG. It is a rear view of the member 20b for a display used for the meter apparatus A of Example 1. FIG. It is sectional drawing of the member 20b for a display used for the meter apparatus A of Example 1, Comprising: The state cut | disconnected by the S7-S7 line | wire of FIG. 5 is shown. It is the side view of the member 20b for a display used for the meter apparatus A of Example 1, Comprising: It is the figure seen from the right side of FIG. It is an expanded sectional view of the principal part of meter device A of Example 1. It is a perspective view which shows the other engaging member 101. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speedometer 2 Engine speed meter 3 Fuel meter 4 Water temperature meter 14 Lower housing 19a Diffusion plate member 19b Diffusion plate member 19c Diffusion plate member 20a Display member 20b Display member 20c Display member 21a Pointer 21b Pointer 21c Pointer 21d Pointer 24 Light emitting diode (light source)
101 engagement member 204 number display unit 205 scale display unit 206 light shielding layer 206a inclined surface 207 engagement claw (protruding member; engagement member)
208 Positioning pin (protruding member)
209 Identification pin (protruding member)
A Meter device

Claims (3)

A resin display member having a display portion formed on the surface thereof, which is arranged along the movement range of the pointer and is supported by the housing, and transmits and displays light emitted from the light source guided from the back side;
A resin-made light shielding provided integrally with the display member, which is provided on the back side of the display member and has a light shielding property to prevent light entering the inside of the display member from being transmitted to the back side. Layers,
A protruding member that protrudes from the light shielding layer toward the back surface of the display member and has at least one of a function of fixing the display member to the housing and a function of positioning, and is formed integrally with the light shielding layer. When,
A meter device comprising: The light shielding layer is provided on the outer peripheral edge of the back surface of the display member;
The engagement member which engages with the housing as the projecting member and fixes the display member to the housing is provided with a plurality of surrounding members surrounding the display member. The meter device described.   The meter device according to claim 1, wherein the light shielding layer includes an inclined surface that reflects light that has entered the display member toward the display unit.

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