JP2574402Y2 - Heat dissipation structure of meter case - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiating structure for a meter case, and more particularly to a heat radiating structure for a meter case capable of sufficiently radiating heat around a lamp attached to a concave portion formed on the back surface of the meter case. About.

[0002]

2. Description of the Related Art Conventionally, a combination meter used in an automobile includes a pointer type meter such as a speedometer, an engine tachometer, a fuel meter, etc., as well as a battery charge abnormality, a catalyst abnormality for purifying exhaust gas, a hand brake. A warning lamp is provided to indicate the on / off state of the vehicle. On the back side of the case of the combination meter, a mounting hole for a lamp for lighting these pointer type meters and a lamp for lighting a warning lamp is provided.

FIG. 5 shows the configuration of the back side of a meter case 10 of a conventional combination meter. The meter case 10 of the combination meter is provided with a large number of mounting holes 12 for a lamp for illuminating a pointer-type meter and a lamp for turning on a warning lamp on a back surface 11 thereof. In general, a wiring board made of a flexible substrate is laid on the back surface 11 of the meter case 10, and a lamp is mounted on the wiring board, and power is supplied to the lamp via the wiring board.

[0004] Usually, on the back surface 11 of the meter case 10,
As shown in FIG. 6A, a lamp 13 is mounted at the position of the back surface 11. However, there is a case where it is desired to move the position of the lamp 13 to the front side of the meter case 10 with the improvement of the illumination in the meter case 10. This is because the light of the lamp may not be circulated on the scales of the meters and shades may be generated on the scales. In such a case, conventionally, as shown in FIG. The rear surface 11 of the device 10 is dropped forward to form a concave portion 14, and the lamp 13 is attached to the bottom surface 15 of the concave portion 14.

FIG. 7 shows a concave portion 14 formed on one side of a back surface 11 of a meter case 10 and a lamp 1 formed on a bottom surface 15 thereof.
3 shows an example where 3 is attached. When the lamp 13 is provided on the front side of the meter case 10 as described above, it is possible to remove a shadow generated on a scale portion of meters and the like.

[0006]

However, when the concave portion 14 is formed in the meter case 10 and the lamp 13 is attached to the bottom surface 15 as described above, the gap between the lamp 13 and the surrounding wall surface 16 is small. The heat generated by the lamp 13 when the lamp 13 is turned on is trapped in the recess 14,
The temperature of the lamp terminal portion of the wiring board (not shown) laid between the lamp 13 and the bottom surface 15 rises, causing problems such as deformation of the wiring board and shortening of the life of the lamp due to heat.

As a countermeasure to prevent heat build-up generated by the lamp 13 in the concave portion 14, a part 11 of the meter case 10 below the concave portion 14 shown by a two-dot chain line in FIG.
It is conceivable to remove a, but if this part is removed, a new problem occurs in that the degree of freedom in designing the meter case 10 is reduced.

In view of the above, the present invention suppresses a rise in the temperature around the lamp even in a combination meter provided with a pointer-type meter or a warning lamp, in which a recess is provided on the back surface of the meter case and the lamp is mounted. It is an object of the present invention to provide a heat dissipation structure of a meter case capable of performing the heat dissipation.

[0009]

The heat radiation structure of the meter case according to the present invention which achieves the above object is a meter case of a combination meter provided with a meter internal unit for driving a pointer and a lamp for a warning lamp. A part of the case on the back side is recessed to the front side to form a recess,
In a meter case in which a lamp for internal illumination of the meter case is mounted in a mounting hole provided on the bottom surface of the concave portion, at least a lower wall surface of the wall surrounding the concave portion has a space below the meter case. V communicating with
A vent or a vent that penetrates part of the meter case
The Ranaru air passage provided, is characterized in that the cooling air from the air passage to the time of lighting the lamp for the internal lighting is configured to flow into the recess.

[0010]

According to the meter case heat radiation structure of the present invention, at least the lower wall surface of the lamp installation recess provided on the back surface of the meter case has an air passage communicating with the space below the meter case. Is provided, when the lamp is turned on and the temperature in the concave portion rises, cool cooling air is guided into the concave portion through the air passage from the lower side of the concave portion. Or from above, and the heat in the recess is radiated. As a result,
The rise in the temperature in the recess is suppressed, the rise in the temperature of the terminal portion of the wiring board is suppressed, and the wiring board is hardly deformed, and the life of the lamp is also improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. The same components as those of the conventional meter case 10 described with reference to FIGS.

FIG. 1 shows the configuration of an embodiment of a heat radiating structure of a meter case according to the present invention, and shows the entire configuration of the rear side of a meter case 10 of a combination meter mounted on an automobile. On the back surface 11 of the meter case 10 of the combination meter of this embodiment, there are also provided a large number of mounting holes 12 for lamps for illuminating the pointer type meter and for turning on warning lamps. On the back surface 11, a wiring board made of a flexible substrate is laid, and a lamp is mounted on the wiring board, and power is supplied to the lamp via the wiring board.

In this embodiment, similarly to the structure described with reference to FIG. 7, one side of the back surface 11 of the meter case 10 is recessed to form a concave portion 14, and a lamp mounting hole 13a is provided in the bottom surface 15. By mounting the lamp 13 in the mounting hole 13a, it is assumed that shadows generated on the scales of meters are removed.

In this embodiment, when the concave portion 14 is formed in the meter case 10 and the lamp 13 is mounted on the bottom surface 15 of the meter case 10, in this embodiment, the heat generated by the lamp 13 in the concave portion 14 is prevented from being trapped. as a structure, V-shaped grooves 1 that communicates over the lower side wall surface 16 of the wall surrounding the recess 14 in the space below the main <br/> Takesu 10
Are two , part 1 of the meter case 10 below the recess 14.
1a . FIG. 2A is an enlarged view of the concave portion 14 with the lamp 13 attached to the concave portion 14. It is assumed that there is actually a wiring board on which a power supply line to the lamp 13 is printed on the bottom surface 15 of the concave portion 14.

As described above, when two V-shaped grooves 1 communicating with the space below the meter case 10 are formed in the part 11a of the meter case 10 below the concave portion 14, the concave portion 1 is formed.
The lamp 13 is attached to 4, and the lamp 13 is turned on.
Even if heat is generated from the lamp 13, cooling air is introduced from the V-shaped groove 1 communicating with the space below the meter case 10 as shown by the arrow C, and the heat generated by the lamp 13 is shown by the arrow H The heat is radiated from above the recess 14. At this time, if there is a margin in the portion of the meter case 10 above the concave portion 14, the heat dissipation groove 5 for dissipating heat upward as shown by the dotted line can be further formed, and the heat dissipation effect is further enhanced. .

By forming two V-shaped grooves 1 communicating with the space below the meter case 10 without removing the entire portion 11a of the meter case 10 below the concave portion 14 as shown in FIG. As shown in FIG. 2B, parts such as the buzzer 4 can be attached between the part 11a of the meter case 10 and the main body of the meter case 10, and the degree of freedom in design is improved. Note that reference numeral 17 shown in FIG.
Is a wiring board laid on the back surface 11 of the meter case 10.

FIG. 3 is a partial side view of a meter case 10 according to another embodiment of the present invention, including a partially cut-away cross section, showing the structure of the heat radiation structure of the meter case. Are denoted by the same reference numerals. In this embodiment, two ventilation holes 2 communicating with the space below the meter case 10 are formed in the lower wall surface 16 ′ of the wall surface 16 surrounding the recess 14. Also in the heat radiation structure of the meter case of this embodiment, the lamp 13 is attached to the concave portion 14 and the lamp 13 is turned on. , The cooling air is introduced as shown by the arrow C, so that the heat generated by the lamp 13 is radiated.

FIG. 4 is a partial side view of a meter case 10 according to a further embodiment of the present invention, including a partially cut-away cross section, showing the structure of the heat radiation structure of the meter case 10 according to the present invention. The members have the same reference numerals. Also in this embodiment, the ventilation hole 3 communicating with the space below the meter case 10 is formed in the lower wall surface 16 ′ of the wall surface 16 surrounding the concave portion 14.
Is formed so as to extend the bottom surface 15 of the concave portion 14 downward. Therefore, the width of the ventilation hole 3 of this embodiment is
4 is substantially the same as the width of the bottom surface 15. A wiring board 17 laid in the recess 14 is extended and attached in the ventilation hole 3.

Therefore, in the heat radiating structure of the meter case of this embodiment, the lamp 13 is attached to the concave portion 14 so that the lamp 13 is turned on, and the lamp 13 generates heat and communicates with the space below the meter case 10. When cooling air is introduced into the recess 14 from the ventilation hole 3 as shown by the arrow C, the cooling air cools the wiring board 17 extended into the ventilation hole 3. Therefore, in the heat radiating structure of the meter case of this embodiment, the heat radiating area of the heat generated by the lamp 13 increases, and the heat radiating effect is greater than that of the heat radiating structures of the meter cases of the above two embodiments.

In the embodiment described above, the case where the concave portion 14 is provided on the side of the meter case 10 has been described. However, the present invention can be effectively applied to the case where the concave portion 14 is provided at the center of the meter case 10. In this case, if the ventilation hole is provided also on the wall surface 16 above the concave portion 14, the effect is further enhanced.

[0021]

[Effects of the Invention] As described above, according to the present invention,
A part of the case on the back side of the meter case is recessed to the front side to form a recess, and a lamp for lighting the lamp for internal illumination of the meter case is mounted in a mounting hole provided on the bottom surface of the recess. The generated heat is radiated by the cooling air from the air passage communicating with the space below the meter case, so that the temperature rise of the lamp terminal of the wiring board is prevented, and the wiring board is deformed or There is an effect that the life of the lamp is not shortened.

[Brief description of the drawings]

FIG. 1 is a rear view of a meter case showing a configuration of a heat dissipation structure of a meter case according to an embodiment of the present invention.

2 (a) is a partially enlarged perspective view showing the periphery of a concave portion of FIG. 1 in an enlarged manner, and FIG. 2 (b) is a perspective view of the same portion for explaining the advantage of the heat radiation structure of the meter case of FIG. is there.

FIG. 3 is a partially cutaway side view showing the configuration of another embodiment of the heat radiation structure of the meter case of the present invention.

FIG. 4 is a partially cutaway side view showing the configuration of still another embodiment of the heat radiating structure of the meter case of the present invention.

FIG. 5 is a rear view of a meter case showing a configuration of a back side of a conventional meter case.

6 (a) is a partially cutaway side view showing a normal lamp mounting position in the meter case of FIG. 5, and FIG. 6 (b) is a case where the lamp mounting position is moved to the front side in the meter case of FIG. FIG. 6 is a partially cut-away side view of the meter case showing FIG.

FIG. 7 is a partial perspective view of a meter case showing the configuration example of FIG. 6 (b).

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 V-shaped groove 2, 3 vent hole 10 meter case 11 back surface of meter case 11 a part of meter case 12 lamp mounting hole 13 lamp 14 recess 15 bottom of recess 16 wall 17 wiring board

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01D 11/24 B60K 35/00 G12B 15/04 H05K 7/20

Claims (1)

(57) [Scope of request for utility model registration] 1. A meter case of a combination meter provided with an internal meter for driving a pointer and a lamp for a warning lamp, wherein a part of the case on the back side is recessed toward the front side to form a recess. In a meter case in which a lamp for internal illumination of the meter case is mounted in a mounting hole provided in a bottom surface of the concave portion, at least a lower wall surface of a wall surface surrounding the concave portion,
A V-shaped groove communicating with the space below the meter case,
Configured in the provided air <br/> air passage comprising a vent hole which penetrates a portion of the meter case, cooling air flows into the recess from the air passage when lighting the lamp for the internal lighting <br The heat radiation structure of the meter case, characterized in that: