JP2584283Y2 - Flexible board mounting structure for 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 structure for mounting a flexible substrate on a case, for example, when mounting a flexible substrate provided with a jumper wire in parallel on the case facing surface side on the back of a case such as a combination meter of an automobile. Regarding the case structure.

[0002]

2. Description of the Related Art For example, on the back side of a case (meter case) of an instrument panel in which various meters and indicators are built, a circuit for driving the meters and indicators and a light source for illuminating the inside of the meter case are provided. And a circuit board provided with a circuit for supplying current to the circuit board. Conventionally, this circuit board was a solid plate made of phenol resin or the like, but in recent years,
Flexible substrates are often used.

[0003] Among such meters, a combination meter provided in front of the driver's seat of an automobile includes meters such as a speedometer, a tachometer, a fuel gauge and a water temperature gauge, and warning lamps (indicating the state of each part of the automobile). Warning lights), and recently, an indicator or the like for displaying the shift position of the automatic transmission. The combination meter also has a built-in light source for night lighting. In such a combination meter, a flexible board, which is a wiring board on which a circuit for driving these meters, a warning light, and a light source, is mounted on the back side of the meter case.

FIG. 6 is an enlarged view showing a part of a flexible substrate 60 mounted on the back of a meter case of a conventional combination meter for an automobile. In the figure, reference numeral 61 denotes a terminal portion connected to a connector attached to a wire harness to the combination meter, 62 denotes a bulb connection hole for illumination, 63 denotes a warning portion provided in a horizontal line at the bottom of the combination meter, 63a Indicates a connection hole of a bulb for lighting the warning portion 63. And the flexible substrate 6
A large number of wiring patterns for driving valves and instruments are provided above zero.

In such a flexible substrate 60, as shown in FIG. 6, a vertical wiring pattern extending from a terminal portion 61 to a warning portion 63, and a valve, an instrument, or the like attached to a bulb connection hole 62 for each illumination. Is provided with a horizontal wiring pattern serving as a power supply circuit. Therefore, a portion where the vertical wiring pattern and the horizontal wiring pattern intersect is inevitably formed, and a jumper wire is conventionally used at the intersection. In the example of FIG. 6, the vertical wiring pattern is prioritized, and the horizontal wiring pattern crossing the vertical wiring pattern is connected to the rear side of the flexible substrate 60 (meter) by a jumper line 64 as shown by a broken line. (The side attached to the case). Generally, a plurality of such jumper wires 64 are often provided in parallel.

FIG. 7 (a) illustrates the mounting state of the jumper wire 64 provided on the meter case side of the flexible board 60 mounted on the back of the combination meter shown in FIG. 6, and FIG. 7 (b). This jumper wire 64
FIG. 3 shows a cross-sectional view of a case where the flexible substrate 60 to which is attached is attached to the meter case 50.

As the jumper wire 64, an inexpensive substantially U-shaped conductive wire is used.
Is inserted from the meter case side of the flexible board 60 into a jumper wire mounting hole 65 provided in the flexible board 60, and is soldered to the land portion on the back side of the flexible board 60 by solder 66 as shown in FIG. Is done.
As shown in FIG. 7A, the jumper wire 64 protrudes from the flexible board 60 to the meter case side in a state of being attached to the flexible board 60. Therefore, as shown in FIG.
A concave portion 51 is provided at a portion corresponding to the mounting position of 4, and when the flexible substrate 60 is mounted on the back surface of the meter case 50, the jumper wire 64 is stored in the concave portion 51.

FIG. 8A shows an example of the configuration of a concave portion 51 provided in the meter case 50 for receiving the jumper wire 64 attached to the meter case 50 side of the flexible substrate 60. In this conventional example, in order to accommodate all the plurality of jumper wires 64, the jumper wires 64
One concave portion 51 is formed in which a portion of the meter case 50 corresponding to the area where the is provided is greatly concaved.

FIG. 8 (b) shows a state where the flexible board 60 is mounted on the meter case 50 of FIG. 8 (a). FIG. 8 (a) is a sectional view of the meter case 50 of FIG. It is. For the sake of simplicity, the description will be given of a case in which two parallel jumper wires 64 are provided on the flexible substrate 60 in this conventional example. In such a configuration, the jumper wire 64 is normally located at a distance as shown by a solid line in FIG. 8B, and does not contact each other, but is deformed as shown by a dotted line when any impact or the like is applied. Contact may cause malfunction. This is likely to occur when the jumper wire 64 is long because the amount of deflection is large. FIG. 8 (c) illustrates a deformed state of the jumper wire 64 in the concave portion 51. FIG. Is shown.

To solve such a problem, the jumper wire 6
It is conceivable to coat 4 with an insulating tube,
The number of steps for attaching the tube to the jumper wire 64 increases, and the cost increases. Therefore, a structure of the meter case 50 as shown in FIG. That is, the flexible board 60 is provided on the meter case 50 side.
Jumper wire 64 attached to the meter case 50 side
The elongated concave portions 52 are independently formed by a number corresponding to the number of the concave portions. Incidentally, also in this conventional example, the flexible substrate 60
In this embodiment, two parallel jumper wires 64 are provided, and the number of the corresponding concave portions 52 is two.

In such a configuration, as shown in FIG. 9B, which is a cross-section taken along the line YY in FIG. 9A, the jumper wire 64 is housed in the independent recess 52, and Since the partition 53 exists between the jumper wire 64 and the jumper wire 64, the jumper wire 64 may be damaged when any impact or the like is applied.
There is no danger of contact even if it is deformed.

[0012]

However, even in the structure shown in FIG. 9 (b) where there is no possibility of contact with normal impact, the flexible substrate 60 floats from the meter case 50 as shown in FIG. 9 (c). If you do, jumper line 6
Since the protrusion 4 goes out of the recess 52, there is no partition between the jumper wires 64, and when any impact or the like is applied, it deforms and comes into contact as shown in FIG. 9D, which may cause a malfunction. .

[0013] The present invention solves the problem of the above-described structure for attaching a flexible board to a case such as a meter case, and effectively prevents the jumper wires from contacting each other even when the flexible board rises from the case. It is an object of the present invention to provide a flexible board mounting structure for a case that can be used.

[0014]

According to the present invention for achieving the above object, a meter and a display are provided on the front side, and the meter and the display are driven on the back side and power is supplied to a light source for illumination. A flexible substrate provided with a wiring pattern for mounting the flexible substrate, and further, a jumper wire is provided in parallel on the case side of the flexible substrate, the flexible substrate mounting structure of the case, wherein the flexible substrate side At least one through hole is provided at a portion between the mounting positions of the jumper wires, and the respective jumper wires are provided at the portion corresponding to the mounting position of the jumper wires to the flexible board on the case side. A recess for accommodating a wire is provided, and at a position on the case corresponding to the through hole, when the flexible substrate is attached to the case. The through hole by inserting the projection for preventing the contact with a height protruding from the flexible substrate is characterized in that is provided.

The recess may be provided independently for each of the jumper wires, and the through hole is formed to be elongated along the longitudinal direction of the jumper wire, and May be a partition wall inserted into the elongated through hole.

[0016]

According to the present invention, even when the flexible board is lifted up from the case, the area between each jumper line and the jumper line is interposed with the protrusion protruding from the case side. Thus, even if the jumper wire is deformed, the protrusion prevents the jumper wires from contacting each other.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is an assembled perspective view of a case and a flexible substrate showing the structure of an embodiment of a flexible substrate mounting structure for a case according to the present invention. Here, the same components as those of the related art described with reference to FIGS. 6 to 9 are denoted by the same reference numerals and described.

As shown in FIG. 1, a valve mounting hole 54 into which a bulb 20 for illuminating the inside of the meter case 50 is inserted, and a connector (not shown) are provided on the back of the meter case 50 constituting the case in this embodiment. A connector groove 55 for inserting a valve, a connector portion 56 of a speedometer, a valve mounting hole 57 into which the warning valve 30 is inserted, and the like are provided at predetermined locations. And like the conventional example,
An independent recess 52 is provided for receiving a jumper line provided on the flexible substrate 60 side. Also in this embodiment, it is assumed that two parallel jumper wires are provided on the flexible substrate 60 side, and the corresponding concave portions 5 are provided.
The case where there are also two will be described.

Further, in this embodiment, the meter case 50
A column-shaped projection 1 is provided in a region (partition portion) 53 between the concave portions 52 provided side by side on the back surface of the substrate. The height of the columnar projection 1 is the meter case 5.
The thickness of the flexible board 60 attached to the back of the meter case 50 is larger than the thickness of the flexible board 60 attached to the back of the meter case 50.
Project from the flexible substrate 60. The position where the projection 1 is provided may be near the center of the entire length of the concave portion 52.

On the other hand, a flexible board 60 attached to the back of the meter case 50 has
A valve connection hole 62 is provided at a position overlapping the valve mounting hole
Is provided, and a terminal portion 61 is provided in a portion overlapping with the connector groove 55, so that a warning valve mounting hole 57 is provided.
A warning port 63 is provided with a valve connection hole 63a, and a through-hole 66 is provided at a position overlapping the connector 56 of the speedometer. As in the conventional example, two jumper wires 64 are provided on the meter case side of the flexible board 60 in parallel with required portions. The mounting position of the jumper wire 64 corresponds to the position where the concave portion 52 of the meter case 50 is provided.

Further, in this embodiment, a circular through hole 11 is provided in a region between the jumper wires 64 provided side by side. The position of this through hole 11 is
Corresponds to the position of the protrusion 1 provided on the rear surface of the meter case 50, such that the protrusion 1 penetrates the through hole 11 and protrudes from the flexible substrate 60 in a state where the flexible substrate 60 is attached to the rear surface of the meter case 50. It has become. The flexible substrate 60 is attached to the back of the meter case 50 by screws 40 or the like.

FIG. 2 (a) shows a partial cross section of the installation position of the jumper wire 64 in a state where the flexible substrate 60 of FIG. 1 is mounted on the meter case 50. Since two jumper wires 64 are attached to the meter case 50 side of the flexible substrate 60 on the meter case 50 side, two elongated concave portions 52 are independently formed. The protrusion 1 protrudes from the flexible substrate 60 through the through hole 11 provided in the flexible substrate 60. In the embodiment shown in this figure, the tip side of the projection 1 is formed in a tapered shape, but this is for facilitating the insertion of the projection 1 into the through hole 11 of the flexible substrate 60.

In such a configuration, as described in the conventional example, the jumper wire 64 is accommodated in the independent concave portion 52, and the partition 53 exists between the jumper wire 64 and the jumper wire 64. Therefore, even if the jumper wire 64 is deformed when some kind of impact or the like is applied, there is no danger of contact.
On the other hand, as shown in FIG. 2B, when the flexible board 60 floats from the meter case 50,
Although the protrusion 4 goes out of the recess 52, the height of the protrusion 1 is higher than the floating amount of the flexible substrate 60, so that the flexible substrate 60 does not fall out of the protrusion 1. Therefore, FIG.
From the meter case 50 shown in FIG.
Even if some kind of impact or the like is applied in a state in which the jumper wires 64 come up and the jumper wires 64 come close to each other, FIG.
As shown in (c) and (d), since the projection 1 is always interposed between the jumper wires 64, there is no possibility that the jumper wires 64 will come into contact with each other.

FIG. 3 (a) shows a first modified embodiment of the meter case side in the flexible case mounting structure of the meter case of the embodiment shown in FIG. In this embodiment, two columnar projections 1 are provided in a region 53 between the concave portions 52. In this case, two circular through holes may be provided at positions corresponding to the flexible substrate 60 side.

FIG. 3B shows a second modified embodiment of the meter case side in the flexible case mounting structure of the meter case of the embodiment shown in FIG. In this embodiment, the ribs 2 are provided over the entire region in the region 53 between the concave portions 52. In this case, a rectangular through hole may be provided at a position corresponding to the flexible substrate 60 side.

The embodiment shown in FIGS. 3A and 3B can also effectively prevent the jumper wires 64 from coming into contact with each other when the flexible substrate 60 is lifted from the meter case 50.

FIG. 4 is a partially enlarged view of a flexible board showing a flexible board mounting structure of a meter case according to another embodiment of the present invention, and shows the same portion as FIG. Therefore, also in this embodiment, the same components as those of the conventional flexible substrate 60 described with reference to FIG. In the figure, 61 is a terminal portion connected to a connector attached to a wire harness to a combination meter, 62 is a bulb connection hole for lighting, 63 is a warning portion provided in a horizontal line at the bottom of the combination meter, and 64 is a jumper Line, 65
Is a jumper wire mounting hole.

A circuit pattern for supplying power to a power supply terminal provided on the valve is provided around the valve connection holes 62 and 63a. Each circuit pattern includes a terminal portion 61 provided on a peripheral portion of the flexible substrate 60.
It is led to. Notches are provided at both ends of the terminal portion 61, and the terminal portion 61 is provided with a meter case 50.
Corresponds to the portion of the connector groove 55 (see FIG. 1) provided on the back surface of. The terminal portion 61 is bent into the connector groove 55 by a connector (not shown) inserted into the connector groove 55 in a state where the flexible substrate 60 is attached to the back surface of the meter case 50, and is provided on a side surface of the connector. It is adapted to be connected to the provided circuit terminal.

In this embodiment, four jumper wires 64 are provided in parallel, and a circular through-hole 11 is provided in a region between the two center jumper wires 64 in the same manner as in the above-described embodiment. A rectangular through hole 13 is provided in a region between the jumper wires 64 at both ends and the two jumper wires 64 at the center. The through hole 11 and the through hole 13 are the jumper wires 6
It is provided substantially in the vicinity of the center of the length of 4.

FIG. 5A shows an example of the configuration of the meter case 50 corresponding to the flexible board 60 of FIG. In this embodiment, the number of jumper wires 64 attached to the meter case 50 side of the flexible substrate 60 is four.
Since it is a book, four elongated concave portions 52 are formed independently. Then, a region 53C between the two central concave portions 52 is formed.
In the same manner as in the above-described embodiment, a tapered cylindrical projection 1 having a tapered end is provided between the jumper wires 64 at both ends and the two jumper wires 64 at the center. The rectangular projections 3 are provided in the regions 53A and 53B. The protrusions 1 and 3 are provided near the center of the length of the jumper wire 64. The height of the projections 1 and 3 is longer than the thickness of the flexible substrate 60 as in the above-described embodiment.

Also in the configuration of this embodiment, the jumper wire 64 is accommodated in the independent concave portion 52, and partition walls 53A, 53 are provided between the jumper wire 64 and the jumper wire 64.
Since B and 53C are present, there is no danger that the jumper wire 64 will come into contact when it is deformed when any impact or the like is applied.
On the other hand, when the flexible board 60 floats from the meter case 50, the jumper wire 64 goes out of the recess 52, but the height of the projections 1 and 3 is
, The flexible board 60 does not fall out of the projections 1 and 3. Therefore, meter case 5
Even if the jumper wires 64 approach each other in a state where the flexible substrate 60 has risen from 0 and the jumper wires 64 approach each other, the jumpers 1 and 3 are always interposed between the jumper wires 64. There is no fear of contact.

FIG. 5B shows another example of the configuration on the meter case side corresponding to the flexible board 60 of FIG. In this embodiment, the number of jumpers 64 (4
In the area on the meter case 50 corresponding to (1), a concave portion 51 which is entirely concave is formed. A columnar base 4 is provided on the meter case 50 corresponding to the area between the two center jumper lines 64, and the columnar base 4 is tapered at its tip to taper. Protrusion 1
Are provided in the same manner as in the above-described embodiment. Further, a cuboid base 5 is provided on the meter case 50 corresponding to the area between the jumper wires 64 at both ends and the two jumper wires 64 at the center, and the cuboid protrusions 3 are provided thereon. Is provided. The protrusions 1 and 3 are provided near the center of the length of the jumper wire 64. The height of the projections 1 and 3 is shown in FIG.
It is longer than the thickness of the flexible board 60 as in the embodiment of FIG.

Although the bases 4 and 5 provided below the projections 1 and 3 hold the flexible substrate 60 so as not to fall into the recess 51, it is not always necessary to provide them. 1 and 3 may be extended to the bottom of the concave portion 51 in the same shape. Further, the meter case 50 on the side surface of the projections 1, 3 instead of the base tables 4, 5
A protruding portion for holding the flexible substrate 60 may be provided at a position having the same height as that of the flexible substrate 60.

In the structure of this embodiment, there is no partition wall in the concave portion 51 between the jumper line 64 and the jumper line 64, but the projections 1 and 3 are provided extending to the bottom of the concave portion 51. Therefore, even if the jumper wire 64 is deformed when any impact or the like is applied, the flexible substrate 6
Even if the floating occurs at 0, there is no possibility that the jumper wires 64 will come into contact with each other as in the above-described embodiment.

In each of the embodiments described above, a meter case such as a combination meter of an automobile is used as a specific example of the case. However, the present invention is not limited to this.

[0037]

[Effects of the Invention] As described above, according to the present invention,
Even when the flexible board is lifted up from the case, there is an effect that the contact between the jumper wires can be effectively prevented.

Further, even if the jumper wires are arranged adjacent to the flexible board, simultaneous contact of the jumper wires can be prevented without increasing the number of components and the number of steps, so that there is an effect that the cost is not increased.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view showing an embodiment of a flexible board mounting structure for a case according to the present invention.

2 (a) is a partial cross-sectional view of the installation position of a jumper wire in a state where the flexible substrate of FIG. 1 is attached to a meter case constituting a case, and FIG. 2 (b) the flexible substrate rises from the state of FIG. Partial cross-sectional view showing
(c) is a partial cross-sectional view showing a state in which the jumper wires approach each other in the state of (b), and (d) is an explanatory diagram showing a state in which the jumper wires approach each other in the state of (b).

FIG. 3 (a) is a partial perspective view showing a first modified embodiment of the meter case side constituting the case in the flexible board mounting structure of the case of the present invention, and FIG. 3 (b) is the mounting of the flexible board of the case of the present invention; It is a fragmentary perspective view which shows the 2nd modification on the meter case side which comprises the case in a structure.

FIG. 4 is a partially enlarged rear view of the flexible board showing a flexible board mounting structure of a case according to another embodiment of the present invention;

5A is a partially enlarged perspective view showing an example of a configuration of a meter case side constituting a case corresponding to the flexible substrate of FIG. 4, and FIG. 5B is a side view of the meter case corresponding to the flexible substrate of FIG. FIG. 10 is a partially enlarged perspective view showing another example of the configuration of FIG.

FIG. 6 is a partially enlarged rear view of a flexible substrate attached to the back of a meter case of a conventional automobile combination meter to which an instrument, a warning light, an illumination lamp, and the like can be attached.

FIG. 7A is a partially enlarged perspective view illustrating a mounting state of a jumper wire provided on a meter case side of a flexible substrate mounted on the back of the combination meter,
(b) is a partial enlarged cross-sectional view of a mounting portion of a jumper wire of a meter case to which a flexible board is mounted.

FIG. 8A is a partial perspective view showing an example of a configuration of a concave portion provided on the meter case side for receiving a jumper wire attached to the meter case side of the flexible substrate,
(b) is a sectional view taken along line XX of the meter case of (a) with the flexible substrate attached, and (c) is a view for explaining deformation of a jumper wire in the concave portion.

FIG. 9A is a partial perspective view showing another example of the configuration of the concave portion provided on the meter case side for receiving a jumper wire attached to the meter case side of the flexible substrate, and FIG. In the installed state
(a) is a cross-sectional view of the meter case taken along line YY, (c) is
FIG. 4B is a diagram illustrating a state in which the flexible board is lifted from the state of FIG. 4B, and FIG. 4D is a diagram illustrating a state in which a jumper wire contacts the state of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 columnar projection 3 rectangular parallelepiped projection 4, 5 base base 11 circular through hole 13 rectangular through hole 50 meter case (case) 51 concave portion 52 independent concave portion 53, 53A to 53C partition wall portion 60 flexible substrate 64 jumper Wire 65 Jumper wire mounting hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A flexible board having a meter and a display on the front side and a wiring pattern for driving the meter and the display and energizing a light source for illumination is mounted on the back side. Further, when jumper wires are provided in parallel on the case side of the flexible substrate,
At least one through-hole is provided on the flexible substrate side at a position between the mounting positions of the jumper wires, and the case side includes the jumper wires. A concave portion for accommodating each of the jumper wires is provided at a position corresponding to the mounting position on the flexible substrate, and a position on the case corresponding to the through hole is provided when the flexible substrate is mounted on the case. A flexible board mounting structure for a case, wherein a projection for preventing contact having a height protruding from the flexible board through the through hole is provided.