JP2570344Y2 - Structure to prevent forgetting to twist the valve assembly - 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 preventing forgetting of twisting of a valve assembly. More specifically, when a socket of a valve is inserted and twisted into a valve hole provided on a substrate, it is prevented from forgetting to twist. The present invention relates to a structure for preventing forgetting of twisting of a valve assembly.

[0002]

2. Description of the Related Art Conventionally, as a lighting device such as a speedometer or other warning housed in an instrument case, a valve hole is provided on the back surface of the case, and a socket having a valve attached from outside the valve hole. And light up,
There is a type in which a dial such as a speedometer disposed on the front of a case, a lens for warning, and the like are illuminated. FIG. 2 shows an example of such a lighting device. In the figure, reference numeral 10 denotes a case of an instrument, on the surface of which a flexible wiring board 20 is arranged.
Are provided in the valve holes 11 and 21.
Valve assembly 30 composed of 2 and socket 31
Are fitted and fixed.

[0003] That is, as shown in FIG.
A circular valve hole 11 for fixing the valve assembly 30 is formed in the surface of the valve hole 30, and a pair of notches 12 are provided at both ends of the valve hole 11. Also,
As shown in FIG. 4, the valve assembly 30 includes a plastic socket 31 and a valve 32 removably fitted therein.

[0004] As shown in FIG.
A hat-shaped funnel portion 36 having a pair of cuts 36a on both sides and a pair of engagement protrusions 33 having a triangular shape in side view are provided.
Is slightly smaller than the thickness obtained by adding the thickness of the flexible wiring board 20 to the thickness H of the portion. For this reason, the socket 30 is turned downward with the valve 32 as shown in FIG.
When the socket 30 is inserted and twisted (usually clockwise) in accordance with the notch 12 of the valve hole 11, the socket 30 rotates while fitting into the case 10.

[0005] Then, the case 10 is sandwiched between the flange portion 36 of the socket 31 and the engagement protrusion 33, and the valve assembly 30 itself is fixed to the surface of the case 10. A pair of stoppers 34 are provided on both sides of the inner surface of the flange portion 36 of the socket 31. When the socket 31 is twisted, the stoppers 34
The socket 31 cannot be twisted any more by contacting the wall surfaces of the notches 12 provided at both ends of the zero valve hole 11, thereby determining the fixing position of the socket 31.

FIG. 5 also shows the flexible wiring board 20.
As shown in FIG. 1, a valve hole 21 having a pair of notches 22 is provided around the valve hole 21. A pair of conductive portions 23, 2 made of copper foil are provided around the valve hole 21 having the notches 22.
3, and a circuit pattern 24 is connected to each of the conductive portions 23, 23. On the other hand, the socket 31 of the valve assembly 30 is provided with a pair of terminals 35 at positions substantially 90 degrees shifted from the positions where the engagement protrusions 33 are provided.
Has a protruding shape and is formed elastically.

[0007] When the socket 31 is fitted into the valve hole 11 of the case 10 via the valve hole 21 of the flexible wiring board 20, the conductive portion 2 of the flexible wiring board 20 is fitted.
When the terminal 3 and the terminal 35 elastically contact with each other and a voltage is applied to the conductive portion 23 through the circuit pattern 24, the bulb 22 is energized through the terminal 35 of the socket 31 and the bulb 22 is turned on.

[0008]

However, in the above-described structure of the lighting device, the engaging projection 33 provided on the socket 31 of the bulb assembly 30 is connected to the wiring board 20 and the case 1.
0, notches 12 and 2 of valve holes 11 and 21
When the socket 31 is inserted into the valve holes 11 and 21 in accordance with 2, the terminal 35 provided on the socket 31 and the conductive portion 23 of the wiring board 20 are in contact at that time. For this reason, even if the user forgets to fix the socket 31 by twisting the socket 31, the bulb 32 is turned on when the power is supplied during the inspection, so that there is a risk that a mounting error may be overlooked.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for preventing the valve assembly from being forgotten when the socket of the valve is inserted into the valve hole provided on the substrate and fitted.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a valve assembly for preventing twisting of a valve assembly is provided with a valve hole having a pair of notches on the periphery and a pair of conductive portions disposed around the valve hole. A substrate having a pair of terminals to which a valve is attached is inserted into the valve hole by using the notch portion and twisted and fixed to the substrate, thereby bringing the conductive portion into contact with the terminal, In a structure for preventing forgetting of twisting of a valve assembly used in a lighting device in which the bulb is energized by a voltage applied to the part and turned on, when the socket of the conductive part is fixed to a substrate by twisting the socket, It is characterized in that an insulating portion is formed in a portion of the socket that is in contact with the terminal and a portion other than a portion around the terminal.

[0011]

According to the above construction, a socket having a valve attached thereto is inserted into the valve hole using the cutout portion of the valve hole of the substrate. Then, when the socket is fixed to the substrate by twisting, the pair of terminals provided on the socket comes into contact with the conductive portion provided around the valve hole of the substrate, and when a voltage is applied to the conductive portion, the socket is The bulb is energized through the switch and lights up. On the other hand, when the socket is just inserted into the valve hole and the socket is not yet twisted, or when the twist is small and it is not securely fixed to the board, the terminal of the socket contacts the insulating part. Therefore, even if a voltage is applied to the conductive portion, the bulb is not energized, and the bulb is not turned on. As a result, it is possible to find a socket in which the socket is not securely twisted at the inspection stage, thereby preventing an initial operation failure or the like.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The forgotten twisting structure of the bulb assembly according to the present invention is the same as the illumination device described in the section of the prior art, but the same bulb assembly is used, and the structure of the flexible wiring board is changed. is there.

That is, as shown in FIG. 1A, a socket 31 is inserted into the valve hole 21 of the conductive portion 23 of the same shape as the conventional one disposed around the valve hole 21 of the wiring board 20. When twisted to the fixed position, socket 31
Contact portion 23 of the conductive portion 23 with which the terminal 35 contacts
Except for a and its surroundings 23b, the surface of the conductive portion is provided with an insulating portion 23c provided with an insulating coating.

For this reason, when the socket 31 is not twisted even when inserted into the hole of the valve 21, or when the twist is small and is not securely fixed to the wiring board 20 and the case 10, the terminal 35 of the socket 31 is Since a portion of the conductive portion 23 of the wiring board 20 is in contact with the portion 23c of which the surface is insulated and coated, even if a voltage is applied to the conductive portion 23, the valve 32
Does not turn on without electricity. For this reason, it is possible to find out that the socket 31 is not twisted surely at the inspection stage, and it is possible to eradicate defective products related to the valve assembly 30 before shipment.

Note that, as shown in FIG.
A cutout 23e may be provided in a part of the conductive portion 23 arranged around the zero valve hole 21 to form the non-conductive portion 23d. Also in this case, the non-conductive portion 23d
Has the same effect as applying insulating coating to the surface of the conductive portion 23, and thus exhibits the above-described effect.

[0017]

[Effect of the invention] As described above, according to the invention,
By simply applying a voltage to the conductive portion of the substrate, it is possible to find out whether the socket of the valve assembly attached to the substrate is securely twisted and fixed, and it is possible to prevent forgetting to twist.

[Brief description of the drawings]

FIG. 1A is a plan view of a flexible wiring board used for a structure for preventing forgetting of twisting of a valve assembly according to an embodiment of the present invention, and FIG. 1B is a modification thereof.

FIG. 2 is a perspective view of a main part of a lighting device conventionally used for an instrument.

FIG. 3 is a perspective view showing a portion of the instrument case where a valve hole is formed.

FIG. 4 is a perspective view of a valve assembly.

FIG. 5 is a plan view of a flexible wiring board used in a conventional lighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Instrument case 11 Valve hole 12 Notch 20 Flexible wiring board 21 Valve hole 22 Notch 23 Conductive part 23a Contact part 23c Insulation part 30 Valve assembly 31 Socket 32 Valve 33 Engagement projection 35 Terminal

Claims (1)

(57) [Scope of request for utility model registration] 1. A socket having a pair of terminals to which a valve is attached is provided on a substrate provided with a valve hole having a pair of notches and a pair of conductive portions disposed around the valve hole. By using the notch portion to insert into the valve hole and twist and fix it, the conductive portion and the terminal are brought into contact, and the voltage is applied to the conductive portion so that the bulb is energized and turned on. In the structure for preventing forgetting of the twist of the bulb assembly used in the lighting device, the insulating portion is provided in a portion of the conductive portion except for a portion where the terminal of the socket comes into contact when the socket is twisted and fixed to the substrate and a periphery thereof. A structure for preventing forgetting of twisting of the valve assembly characterized by being formed.