JPH0125718Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle lamp, and particularly relates to an improvement in a grounding structure for grounding to a vehicle body.

In conventional room lamps, in order to ground the wired cord, the cord is soldered to a ground terminal a as shown in FIGS. 2 and 3, and the ground terminal a is placed in the housing b. Then, as shown in Fig. 1, the tapping screw c is passed through the screw insertion hole d of the earth terminal a and the insertion hole e of the housing b, and then
When the head of the tapping screw c comes into contact with the seat plate g of the earth terminal a, the earth terminal a is electrically connected to the vehicle body f via the tapping screw c. It is configured so that it can be grounded by.

By the way, if the tapping screw c is not completely tightened or loosens due to vibrations of the vehicle body, the head of the tapping screw c and the seat plate g of the ground terminal a may become separated from each other. The disadvantage is that the lamp does not light up even if you turn on the switch because it cannot be grounded.

In view of the above-mentioned circumstances, the present invention aims to provide a vehicular lamp that can ensure reliable contact between the earth terminal and the screw for fixing it, thereby preventing poor contact. .

The details of the present invention will be explained below with reference to FIGS. 4 to 11.

As shown in FIGS. 4 to 7, the vehicle lamp according to the present invention includes a lens 2 disposed on the front surface of a housing 1, and a light chamber 3 defined by the lens 2 and the housing 1. Valve 4 is installed at
A cord 5 wired to the valve 4 is connected to a ground terminal 6, and the ground terminal 6 is electrically connected to the vehicle body 8 via a tapping screw 7.

That is, the earth terminal 6 is fixed to the inner surface of the housing 1 by a rivet 9, and is made of a thin conductive material made of brass, for example, as shown in FIGS. 8 to 11.
Seat plate 61 with screw insertion holes 62 as shown in the figure
It is formed into an L-shape. The seat plate 61
A cylindrical portion 63 large enough to allow the tapping screw 7 to be inserted is formed at one end, and a contact piece 64 is formed inwardly at the tip of the cylindrical portion 63. The four contact pieces 64 are provided inside the cylindrical part 63 so as to protrude in the cross direction, and when the tapping screw 7 is passed through the cylindrical part 63, the contact pieces 64 are screwed into the cylindrical part 63, so that each contact piece 64 can be screwed into the cylindrical part 63. It is adapted to be able to engage with the valley of the threaded portion 71 of the U7. Therefore, each contact piece 64
forms an angle α that approximately corresponds to the lead angle of the tapping screw 7. Note that there is a notch 6 at the other end of the ground terminal 6 for soldering the cord 5.
5 is formed. 66 is a hole through which the rivet 9 is passed.

On the other hand, the housing 1 is a molded product made of synthetic resin, and has a recessed seat 11 for positioning the earth terminal 6 at a position corresponding to the earth terminal 6, and the cylindrical part 63 is fitted into the recess 11. A fitting part 12 for the cylindrical part is formed. The fitting part 12 has a peripheral wall 12a formed on the back surface of the housing 1 so as to surround the peripheral surface of the cylindrical part 63, and has an end portion of the peripheral wall 12a that contacts the vehicle body 8, and has a screw of the tapping screw 7. A bottom plate 12b with a hole through which the portion 71 passes is formed so that the cylindrical portion 63 can be fitted when the earth terminal 6 is fixed to the housing 1. In addition, in Figure 5,
A spacer 10 is interposed between the fitting portion 12 and the vehicle body 8.

To ground the earth terminal 6 to the vehicle body 8, pass the tapping screw 7 through the screw insertion hole 62 of the seat plate 61 of the earth terminal 6 set in the housing 1 to the cylindrical part 63, and then 12, and the tapping screw 7 is screwed into the vehicle body 8 at a predetermined position so as to be screwed together. As a result, the seat plate 61 of the ground terminal 6 and the head of the tapping screw 7 come into contact, and at the same time, the valley of the threaded part 71 and the contact piece 64 of the cylindrical part 63 engage, so that the ground terminal 6 Electrical connection between the screw and the tapping screw 7 can be made at two places. the result,
Even if the head of the tapping screw 7 is loose or not completely tightened and the seat plate 61 of the earth terminal 6 is separated, the engagement between the contact piece 64 and the valley of the threaded part 71 will allow the earth to be grounded. The terminal 6 can be reliably connected to the vehicle body 8 via the tapping screw 7.

Furthermore, in the illustrated embodiment, since the housing 1 is provided with a concave seat 11 for positioning the earth terminal 6, it is convenient when assembling the earth terminal 6 to the housing 1. Furthermore, although an example using the tapping screw 7 has been shown, the present invention is not necessarily limited to this.
It is also possible to use a general screwdriver instead.
In that case, it goes without saying that the vehicle body 8 is provided with a screw hole for the screw.

As described above, according to the present invention, when the screw is inserted through the earth terminal and the housing and screwed onto the vehicle body, the contact piece of the earth terminal engages with the threaded part of the screw.
Since the ground terminal is configured to be electrically connected to the vehicle body through the screw, even if the screw is loose, connection failures can be resolved and reliability can be improved.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the main parts of a conventional vehicle lamp, Figures 2 and 3 are front and side views of the earth terminal, and Figure 4 is a vehicle lamp according to the present invention applied to a room lamp. A broken front view showing one embodiment, FIG. 5 is a sectional view taken along the - line in FIG. 4,
Fig. 6 is a broken rear view showing the housing, Fig. 7 is an enlarged sectional view of the main parts, Fig. 8 is an enlarged plan view showing the earth terminal, Fig. 9 is a sectional view taken along the line - in Fig. 8, and Fig. 10 is an enlarged sectional view of the main part. The figure is a view in the direction of the arrow in Figure 8,
The figure is a view taken in the direction of arrow XI in FIG. DESCRIPTION OF SYMBOLS 1... Housing, 12... Fitting part, 6... Earth terminal, 61... Seat plate, 63... Cylindrical part, 64... Contact piece, 7... Screw, 71...
...Screw part, 8...Car body.

Claims (1)

[Scope of utility model registration request] The screw is inserted through the earth terminal and the housing to be wired to the lamp and screwed into the car body, and the head of the screw comes into contact with the seat plate of the earth terminal, so that the earth terminal is electrically connected to the car body through the screw. In a vehicle lamp connected to a contact piece capable of engaging with a threaded portion of the earth terminal, and a fitting portion capable of fitting the cylindrical portion of the earth terminal is bored at a position corresponding to the cylindrical portion of the earth terminal; When the cylindrical part is fitted into the fitting part and the screw is passed through the cylindrical part of the earth terminal and the fitting part and screwed into the vehicle body, the contact piece of the cylindrical part will fit into the threaded part of the screw. A vehicle lamp characterized in that a ground terminal can be electrically connected to a vehicle body by engagement.