JPH0222953Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to the structure of a socket for a lamp bulb used in a vehicle lamp or the like.

<<Prior Art>> A conventional rear-exchangeable valve socket, for example, as shown in FIG. Equipped with 2 sockets. The socket holder 1 includes two locking claws 1b and one stopper claw 1c around its neck,
A notch 5 is provided around the socket mounting hole 5 of the lamp body 4 so that each pawl 1b, 1c is inserted through the gasket 3.
a, 5b, turn the socket holder 1 clockwise, and clamp the peripheral edge of the mounting hole 5 between the locking claw 1b of the socket holder 1 and the flange 1a, thereby attaching it to the lamp body 4.

As shown in FIG. 8, an insulator 7 is attached to 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, and is used for both a stop lamp and a tail lamp in an automobile lamp. Used when Since the wattage of the stop lamp and the tail lamp are different, be sure to connect the lamp bulb 11 to the socket as shown in Figure 9a.
The two pins 11b and 11c of the base portion have different distances from the bottom, respectively, and are correspondingly inserted into J slots 2a and 2b provided in the socket 2 and have different depths, respectively. If you insert it incorrectly, the lower pin 11b will be damaged as shown in Figure 9b.
The pin 11c hits the bottom wall of the upper J slot 2b and cannot advance any further, and the upper pin 11c hits the bottom wall of the lower J slot 2b.
Since it does not come into contact with the side wall of a, incorrect assembly is prevented. Also, insulator 7 in socket 2
As shown in FIG. 10, two claws 7a and 7b with different widths in the 180 degree direction are provided, and these are inserted into two grooves 2c and 2d with different widths provided in the socket 2, respectively. Coupled with the structure to prevent incorrect assembly between the socket 2 and the valve 11, this is useful for correctly connecting the double filament type to the power source. In FIG. 8, the common minus side cord 12 passes through a guide hole in a bulge 1d formed on the outer periphery of the socket holder 1, and then
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 a waterproofing measure, the gasket 3 around the socket mounting hole 5
and grommet 10 in the positive side cord 9 insertion hole.
and a waterproof cover 13 that covers the entire rear part of the socket holder 1.

《Problems that the invention aims to solve》 However, such conventional sockets
When attaching it to the lamp body, it had to be pushed in and then turned forcefully, which required a jig to be turned on site, which added to the time required for installation.
Further, due to manufacturing errors in the flange 1a and the locking claw 1b, the attachment could not be performed reliably, and the waterproof performance could also be impaired.

Therefore, an object of this invention is to provide an improved lamp bulb socket structure that can be easily attached to a lamp body with one touch and has high waterproof performance.

<Means for Solving the Problems> The lamp bulb socket structure according to this invention includes a cylindrical portion bulging on the outside of the 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 positioning protrusion is formed in the valve holder, and an insulator, to which a positive side cord is connected and is urged toward the valve insertion side by a coil spring, is directly engaged with the inner wall surface of the insulator, and a negative side cord is connected to the insulator. A conductive portion of the cord is directly exposed on the inner wall surface of the bulb holder and is held in direct pressure contact with the base portion of the lamp bulb.

《Operation》 Push the valve holder holding the valve into the cylinder by aligning its elastic claws with the grooves in the cylinder.
When the elastic pawl bends inward and the positioning protrusion of the cylindrical portion enters the positioning hole, the two elastically engage with each other. Further, the valve and the insulator that receives the lower part of the valve are directly guided and held in a groove formed in the inner wall surface of the bulb holder, and the conductive part of the negative side cord also comes into direct contact with the mouthpiece of the valve.

<<Example>> FIG. 1 and FIG. 2 show an example of this invention. On the outside of the lamp body 21,
The cylindrical portion 22 is integrally formed with a bulge. This cylinder part 22 includes a circular hole part 23 and a rectangular groove part 24, and a body part 27 of a bulb holder 26 holding a valve 25 is inserted into the hole part 23.
An elastic claw 28 integrally formed on the outer periphery of the bulb holder 26 is inserted into the groove 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 receiving wall 24a is formed in the groove 24 of the cylindrical portion 22 to receive the locking protrusion 28a of the elastic claw 28, 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, a protrusion 27a is formed on the opposite side of the elastic claw 28 of the bulb holder 26, and this protrusion 27a
The elastic pawl 28 enters into the notch 23a formed on the opposite side of the groove 24 of the cylindrical portion 22.
The positioning protrusion 2 of the groove 24 is inserted into the positioning hole 28b of the
When the cutout 4b is inserted, the protrusion 27a is exactly in contact with the bottom of the notch 23a. Groove 2
4 and the width of the notch 23a are the widths of the elastic claws 2 and 23a, respectively.
8 and the width of the protrusion 27a, the elastic claw 28 is formed so as to gradually move away from the body 27 from its base to its tip.

Align the elastic claws 28 and protrusions 27a with the grooves 24 and notches 23a, respectively, and attach the valve holder 26.
When pushed into the cylindrical part 22, the elastic claw 28 engages the groove part 2.
4 is pushed by the positioning protrusion 24b and bends inward,
The positioning protrusion 2 is inserted into the positioning hole 28b of the elastic claw 28.
When the valve holder 4b enters, the two are resiliently locked, 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 interior 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 a cylindrical shape.
7 are connected by three thin wall portions 27b, one thick wall portion 27c (see FIG. 5) spaced at 90 degree intervals, and a bottom wall 27d. Thick wall portion 2 on the protrusion 27a side
7c, a rectangular elongated hole 30 is formed from the bottom wall 27d leaving the ceiling 30a, and an opening 30b is provided inside the upper half of the hole 30, and the valve holding part 29
It has become connected to the inside of the body.

A terminal 32 connected to a ground cord 31 is inserted into the hole 30. terminal 32
As shown in FIG. 3, the distal end portion 32a is folded back inward, and the intermediate portion is provided with a locking claw 32b. When the terminal 32 is inserted into the hole 30, the tip end 32a hits the ceiling 30a and looks through the opening 30b, and the locking claw 32b locks on the lower end of the opening 30b to prevent it from coming off. Opening 30b
The terminal tip 32a seen from above comes into pressure contact with the base 25a of the lamp bulb 25 inserted into the bulb holding part 29, and is connected to the ground.

Inside the bulb holding part 29, an insulator 35 for connecting the positive side contacts 25b, 25c of the lamp bulb 25 to the positive side power cords 33, 34 is provided with a coil spring 36 interposed between it and the bottom wall 27d. installed. As shown in FIG. 4, a groove portion 29a having a width a is formed in the inner wall surface of the valve holding portion 29 downward from the upper end portion. On the right side of this groove portion 29a, there is an S-shaped step portion 29 extending laterally to the right at a height b from the upper end.
aa is formed, and the lower part thereof is dredged to the same depth up to the bottom wall 27d. On the left side of the groove part 29a, a step part 29ab is formed in the left direction at a position of height c (>b), and the lower part of the step part 29ab is similarly dredged to the same depth to the bottom wall 27d. On the other hand, on the opposite side of the groove 29a, a similar groove 29b has a width d (<a), a height e (<b) to the upper step 29ba, and a lower step 29bb.
They are formed with the same height c.

The insulator 35, as shown in FIG.
Two protrusions 35a are provided on the periphery in a 180 degree direction,
35b is formed. The protruding piece 35a is connected to the groove 2
The width a of the protruding piece 35b is slightly smaller than the width a of the groove 9a, and the width d of the groove 29b is slightly smaller. This insulator 35 is assembled 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 valve holding part 29 by aligning them with the grooves 29a, 29b, and press lower parts 29ab, 29
If you turn it counterclockwise to weaken the pressure beyond bb,
As shown in FIG. 6, due to the restoring force of the coil spring 36, each protrusion 35a, 35b is moved to the non-step portion 29ab,
29bb and held within the valve holding portion 29.

On the other hand, the lamp bulb 25 has a base portion 25a.
It is equipped with two pins 25d and 25e arranged in a 180 degree direction at different heights from the bottom, and the valve is held by aligning the upper pin 25d with the groove 29a and the lower pin 25e with the groove 29b, respectively. When the coil spring 36 is press-fitted into the section 29 and the valve 25 is turned clockwise to release the pressure at the position where each pin 25d, 25e exceeds the upper section 29aa, 29ba, respectively, the coil spring 36
Due to the restoring force, the pins 25d and 25e are respectively locked to the upper portions 29aa and 29ba and held within the valve holding portion 29.

《Effects of the invention》 As mentioned above, the lamp bulb socket structure according to this invention can be used simply by pushing the bulb holder into the cylindrical part that bulges out on the outside of the lamp body.
Since it can be installed with one touch, work efficiency is greatly improved. In addition, since the cylindrical portion that holds the lamp holder is integrally formed to bulge outside the lamp body, the lamp holder can be held securely, with less rattling, and the waterproof performance can be improved. Furthermore, inside the valve holder, the insulator, to which the positive side cord is connected and is urged toward the valve insertion side by a coil spring, is directly locked on the inner wall surface of the insulator, and the conducting part of the negative side cord is connected to the valve holder. Since it is directly exposed and held on the inner wall surface, there is no need for a metal socket that is press-fitted into the resin holder like in the past, reducing the number of parts and eliminating the risk of accidents such as falling out due to poor press-fitting.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of this invention, Fig. 2 is an assembled sectional view of the same embodiment, Fig. 3 is a perspective view of the earth terminal in the same embodiment, and Fig. 4 is: FIG. 5 is a cross-sectional view of the valve holder in the same embodiment, and FIG. 6 is an exploded perspective view of the valve holder and its assembled parts in the same embodiment.
An assembled sectional view of the insulator in the same example,
Fig. 7 is an exploded perspective view showing an example of a conventional lamp bulb socket, Fig. 8 is an assembled sectional view of the conventional example, and Fig. 9a shows normal assembly of the bulb and socket in the conventional example. Front view showing the condition, Figure 9b
1 is a front view of the conventional example when the valve is oriented in the wrong direction, and FIG. 10 is an exploded perspective view of the socket and 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 ... Body, 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, 50...Waterproof cover.

Claims (1)

[Scope of utility model registration request] a cylindrical portion formed bulging on the outside of the lamp body;
a bulb holder that holds a lamp bulb and has an elastic claw that is inserted into the cylindrical part from the outside and is locked; the cylindrical part has a groove for guiding the elastic claw into the inner side thereof; , a positioning protrusion that elastically engages with a positioning hole formed in the elastic pawl is formed, and a positive cord is connected within the bulb holder and is biased toward the valve insertion side by a coil spring. The insulator is directly locked to the inner wall surface of the insulator, and
A socket structure for a lamp bulb, in which a conductive part of a negative side cord is directly exposed to the inner wall surface of the bulb holder and is held in direct pressure contact with a base part of the lamp bulb.