JPS6362102A - Socket construction for lamp bulb - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a 68 FS socket for a lamp bulb used in a vehicle lamp or the like.

(Prior Art) A conventional rear-exchangeable bulb socket, as shown in FIG. 7, includes a synthetic resin socket holder 1 having a flange 1a, and a metal socket press-fitted into the holder 1. 2. Socket holder 1 is
There are two locking claws 1b and one stopper claw 1 around the neck.
C, and connect the winter melons 1b and 1C through the packing 3 to the socket mounting hole 5 of the lamp body 4. Insert it into the notches 5a and 5b provided around the socket holder 1, turn the socket holder 1 clockwise, and lock the periphery of the mounting hole 5 into the locking claw 1b of the socket holder 1.
It is attached to the lamp body 4 by being sandwiched between the lamp body and the flange 1a.

As shown in FIG. 8, an insulator 7 is attached to the inside of the socket 2 via a coil spring 6. A positive cord 9 is connected to a terminal 8 of the insulator 7, and this cord 9 is connected to a grommet 10. is led to the outside through. The reason why there are two terminals 8 on the insulator 7 is to receive a double filament type bulb that has two contacts 11a at the bottom of the base of the lamp bulb 11. Used for dual purposes. Since the wattage of a stop lamp and a tail lamp are different, in order to avoid making mistakes when connecting them to the socket, as shown in FIG.
, 11c are respectively inserted at different distances from the bottom and correspondingly into J slots 2a, 2L) provided in the socket 2 and having different depths. If you put it in the wrong way, as shown in Figure 9(b), the lower bin 11b
Since the bottle 11G hits the bottom wall of the upper J slot 2b and cannot advance any further, and the upper bottle 11G hits the side wall of the lower J slot 2a and does not rotate, incorrect assembly is prevented. Further, as shown in FIG. 10, the insulator 7 in the socket 2 is provided with two claws 7a and 7b having different widths in the 180 degree direction, and these claws are connected to two grooves with different widths provided in the socket 2, respectively. 2c and 2d, and together with the structure to prevent incorrect assembly of the socket 2 and the bulb 11, it is useful for correctly connecting the double filament bulb to the power source. In FIG. 8, the common minus side cord 12 has a bulge 1d formed on the outer periphery of the socket holder 1.
After passing through the inner guide hole, the core wire is sandwiched between the outer peripheral surface of the socket 2 and the inner peripheral surface of the socket holder 1 when the socket 2 is press-fitted into the socket holder 1.

In addition, as waterproof measures, the gasket 3 around the socket mounting hole 5, the grommet 10 in the positive side cord 9 insertion hole,
A waterproof cover 13 that covers the entire rear part of the socket holder 1 is used.

(Problem to be Solved by the Invention) However, when attaching such a conventional socket to a lamp body, it must be pushed in and then turned forcefully, and a jig is used to turn it at the site. ,
It took a lot of man-hours to install it.

Further, due to manufacturing errors in the flange 1a and the locking claw 1b, the attachment may not be performed reliably, and the waterproof performance may also be impaired.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an improved lamp bulb socket structure that can be easily attached to a lamp body with a single touch and has high waterproof performance.

(Means for Solving the Problems) A lamp bulb socket structure according to the present invention includes a cylindrical portion that is bulged on the outside of a lamp body, and a cylindrical portion that holds the lamp bulb and is inserted into the cylindrical portion from the outside and engaged. a bulb holder equipped with an elastic pawl that is stopped; the tubular portion has a groove for guiding the elastic pawl inside the cylindrical portion; and a valve holder that elastically engages with a positioning hole formed in the elastic pawl. A lightning bolt-shaped groove having a bent part in the middle for guiding and holding the positioning bottle of the lamp bulb is formed from the upper end of the inner wall surface of the bulb holder downward.

(Function) When the valve holder holding the valve is pushed into the cylindrical part by aligning its elastic claws with the grooves of the cylindrical part, the elastic claws bend inward and when the positioning protrusion of the cylindrical part enters the positioning hole, Both engage resiliently. Further, the lamp bulb is installed with its positioning pin being guided and held in a lightning-shaped groove formed on the inner wall surface of the bulb holder.

(Embodiment) FIGS. 1 and 2 show an embodiment of the present invention. A cylindrical portion 22 is bulged and integrally formed on the outside of the lamp body 21. This cylinder portion 22 includes a circular hole portion 23 and a rectangular groove portion 24, and the hole portion 23 has a body portion 27 of a valve holder 26 holding a valve 25.
is inserted into the groove portion 24, and an elastic claw 28 integrally formed on the outer periphery of the bulb holder 26 is inserted into the groove portion 24. Elastic claw 28
has elasticity due to the physical properties of the resin material forming the valve holder 26, has a locking protrusion 28a at its tip, and a positioning hole 28b at its lower part.

A locking protrusion 28a of the elastic claw 28 is provided in the groove 24 of the cylindrical portion 22.
The receiving part is formed with a wall 24a, and a positioning protrusion 24b at the tip thereof can be fitted into a positioning hole 28b of the elastic claw 28. On the other hand, the elastic claw 2 of the lamp holder 26
A protrusion 27a is formed at a position opposite to the groove 24 of the cylindrical part 22, and this protrusion 27a enters into a notch 23a formed at a position opposite to the groove 24 of the cylindrical part 22, and the elastic claw 28 When the positioning protrusion 24b of the groove 24 enters the positioning hole 28b, the protrusion 27a is exactly inserted into the bottom of the notch 23a.
is now applicable. Groove portion 24 and notch 23a
The width of each of the elastic claws 28 and the protrusion 27a is slightly larger than that of the protrusion 27a, and the elastic claws 28 are formed so as to gradually move away from the body 27 from the base to the tip.

When the bulb holder 26 is pushed into the cylindrical portion 22 by aligning the elastic claws 28 and the protrusions 27a with the grooves 24 and the notches 23a, respectively, the elastic claws 28 align with the positioning protrusions 24 of the grooves 24.
The positioning hole 28 of the elastic claw 28 is bent inward by being pushed by b.
When the positioning protrusion 24b enters into the positioning protrusion 24b, the two are resiliently engaged, and the valve holder 26 is attached to the cylindrical portion 22. In the case of a waterproof type, a waterproof cover 50 is placed over the entire cylindrical portion 22 from the rear to keep the inside watertight. When removing the valve holder 26 from the cylindrical portion 22, the locking protrusion 28a of the elastic pawl 28 is pressed toward the body 27, the positioning hole 28b is removed from the positioning protrusion 24b, and the valve holder 26 is pulled out from the cylindrical portion 22.

A cylindrical valve holding part 29 is formed concentrically within the body part 27 of the bulb holder 26, and the body part 27 has three thin-walled parts 27b and one thick-walled part 27C (the third part) at 90-degree intervals. 5) and a bottom wall 27d. An elongated rectangular hole 30 is formed from the bottom wall 27d in the thick wall portion 27C on the side of the protrusion 27a, leaving a ceiling 30a, and an opening 30b is provided inside the upper half of the hole 30, so that the valve holding portion 2
It is designed to communicate with the inside of 9.

A terminal 32 connected to a ground cord 31 is inserted into the hole 30. As shown in FIG. 3, the terminal 32 has a distal end 32a folded back inward and a locking claw 32b in the middle. When the terminal 32 is inserted into the hole 30, the tip 32a hits the ceiling 30a and peeks through the opening 30b, and the locking claw 32b locks on the lower end of the opening 30b to prevent removal. The terminal tip 32a seen through the opening 30b comes into pressure contact with the base 25a of the lamp bulb 25 inserted into the bulb holding part 29.
Connect to ground.

Inside the bulb holding part 29, the positive side contacts 25b and 25C of the lamp bulb 25 are connected to the positive side power cord 33.
An insulator 35 for connecting to the bottom wall 27
d via a coil spring 36.

As shown in FIG. 4, on the inner wall surface of the valve holding part 29,
A lightning bolt shape 37 with a width a is formed downward from the upper end. This groove 37 has a height b from its upper end.
It has an upwardly bent portion 37a to the right at the position , and its lower part is sunk to the same depth to the bottom ff127d. The inner wall surface of the valve holding part 29 on the opposite side of the groove 37 in the 180 degree direction has the same width a but a height c (>b
) is formed with another lightning bolt-shaped groove 38 having a bent portion 38a, and the lower part of the groove 38 is similarly extended to the bottom wall 27d at the same depth. Further, adjacent to these grooves 37 and 38, there are step portions 3 at a height d (>C) from the upper end.
Two grooves 39, 40 having 9a, 40a and facing each other in the direction of 180 degrees are formed. On the other hand, 39 years old is
The width of the upper end side is e, the other groove 40 is formed with a width of (<e) on the upper end side, and the 8 grooves 39 and 40 are dredged to the same depth to the bottom wall 27d. There is. Bent portions 37a, 38a of 37.38 mm and step portions 39a, 4 of grooves 39.40
0a and are separated from each other by 90 degrees.

As shown in FIG.
5b is formed. The protrusion 35a is slightly smaller than the width a of the groove 29a, and the protrusion 35b is slightly smaller than the width d of the groove 29b.
slightly smaller than

This insulator 35 is manufactured by first inserting the coil spring 36 into the valve holding portion 29, and then inserting the coil spring 36 into the valve holding portion 29.
a, 35b into the groove 39.40, and then fit the valve holding part 2.
When the protrusions 35a, 35b are press-fitted into the grooves 39a, 40a and turned counterclockwise to weaken the pressure at a position beyond the steps 39a, 40a, the restoring force of the coil spring 36 causes each protrusion 35a, 35b to close to the steps 39a, 40a, as shown in FIG. and is held within the valve holding portion 29.

On the other hand, the lamp bulb 25 is equipped with two positioning bins 25d and 25e disposed in the 180-degree direction with the height from the bottom being shortened on the base part 25a, and the upper bin 25 (
1 to the groove 37 and the lower bottle 25e to the groove 38, press them into the two valve holding parts, and press each bottle 25d, 2
When the valves 25 are turned clockwise to release the pressure when the bottles 5e pass the bent portions 37a and 38a, the restoring force of the coil spring 36 causes the bottles 25d and 25e to engage with the bent portions 37a and 38a, respectively. When the valve is stopped, the valve holding part 2
It is held within 9.

(Effects of the Invention) As described above, the lamp bulb socket structure according to the present invention can be attached with a single touch by simply pushing the bulb boulder into the cylindrical portion formed bulging on the outside of the lamp body, which improves work efficiency. Significantly improved. Also,
Since the cylindrical portion that holds the lamp holder is integrally formed in a bulge on the outside of the lamp body, the lamp holder can be held securely, with less rattling, and the waterproof performance can be improved. Further, since the groove for guiding and holding the positioning pin of the lamp bulb is formed in the shape of a lightning bolt with a bent part in the middle, incorrect assembly will not occur even when a double filament type bulb is used.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention, and FIG.
3 is a perspective view of the earth terminal in the same embodiment, FIG. 4 is a sectional view of the bulb holder in the same embodiment, and FIG. 5 is a sectional view of the valve holder in the same embodiment. FIG. 6 is an exploded perspective view of a bulb holder and its assembled parts; FIG. 6 is an assembled sectional view of an insulator in the same embodiment; FIG. 7 is an exploded perspective view of an example of a conventional lamp bulb socket; FIG. is an assembled sectional view of the conventional example, No. 9
Figure (a) is a front view showing a normal assembled state of the bulb and socket in the conventional example, Figure 9 (b) is a front view of the same conventional example when the valve is oriented incorrectly, and Figure 10. FIG. 2 is an exploded perspective view of a socket and an insulator in the conventional example. 21...Lamp body, 22...Cylinder part, 23a...
- Notch, 24... Groove, 24b... Positioning protrusion, 25... Lamp bulb, 26... Bulb holder, 27... ■ part, 28... Elastic claw, 28b... Positioning Hole, 29...Valve holding part, 30...Earth terminal insertion hole, 31...Earth cord, 32...
・Earth terminal, 33.34...Positive side cord, 35...Insulator, 36...Coil spring, 37.38...Groove for valve positioning pin, 39
．． 40... Insulator positioning groove, 50...
Waterproof cover. Representative Indian Patent Attorney Tetsuji Iwakura (and 1 other person) Figure 1 Figure 2 Figure 3 Figure 7 Figure 9 (a) (b) Figure 10

Claims (1)

[Claims] It consists of a cylindrical part bulging on the outside of the lamp body, and a bulb holder having an elastic claw that holds the lamp bulb and is inserted into the cylindrical part from the outside and locked therein, and the cylindrical part includes: A groove for guiding the elastic pawl and a positioning protrusion that elastically engages with a positioning hole formed in the elastic pawl are formed on the inside thereof, extending downward from the upper end of the inner wall surface of the bulb holder. This is a lamp bulb socket structure in which a lightning bolt-shaped groove with a bent part is formed in the middle to guide and hold the positioning pin of the lamp bulb.