JPS6214628Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to the structure of a socket for holding a small baseless light bulb.

(Prior Art) In general, baseless metal light bulbs called wedge base lamps are widely used for illuminating instrument panels of automobiles and the like, and are usually used by being attached to a special socket. This socket has a socket body that is attached to a mounting hole in a printed circuit board located on the back side of the instrument panel, and the socket body is provided with a recess into which a baseless metal bulb is inserted. A flange portion is provided on the outer periphery of the socket body, and a pair of locking pieces are provided at positions spaced apart from the flange portion in the axial direction, and these locking pieces are used for mounting the printed circuit board. It is adapted to face a notch provided at the opening edge of the hole. Therefore, the socket body should be rotated after aligning the locking piece with the notch and inserting it into the mounting hole, so that the peripheral edge of the mounting hole of the printed circuit board is compressed between the locking piece and the flange. It is fixed to the printed circuit board by. Further, a pair of current-carrying terminals are provided on the flange portion, and lead wires of the baseless metal bulb are respectively connected to these current-carrying terminals. This lead wire is passed through the bottom of the recess and led out to the bottom side of the socket body, and then guided through a groove provided at the bottom of the socket body to a current-carrying terminal, and then connected to this current-carrying terminal by means such as caulking. It is something that is connected.

By the way, since such sockets are relatively small, sockets have been developed that have grooves in the bottom of the socket body into which a screwdriver or the like can be inserted to improve workability during attachment and detachment. in this case,
If the split groove and the groove through which the lead wire is passed are made common, a special split groove for inserting the driver can be eliminated, and the structure can be simplified.

(Problem to be solved by the invention) However, if the driver is inserted into the groove through which the lead wire is passed, the sharp tip of the driver may come into contact with the lead wire, and in that case, the driver may Since force is applied to the lead wire when the socket body is pushed into the mounting hole or rotated, there is a risk that the lead wire may break.

The present invention was developed based on the above circumstances, and even when a jig such as a screwdriver is inserted into the split groove, there is no risk that the jig will come into contact with the lead wire in the split groove, and the lead wire can be It is an object of the present invention to provide a socket for a baseless metal light bulb that can prevent wire breakage and the like.

[Structure of the idea]

(Means for solving the problem) The present invention has a lead wire attached and a jig inserted into the split groove of the socket body, which is located at the bottom of the center part and has a wire diameter larger than the lead wire. It is characterized by having a protrusion of high height.

(Function) According to the above configuration, when the jig is inserted into the split groove, the tip of the jig hits the protrusion and is prevented from entering deeper, and is guided along the bottom of the split groove. This prevents the lead wires from coming into contact with each other, thereby preventing wire breakage and the like.

(Example) The first example of the present invention will be described below in Figures 1 to 4.
This will be explained based on the diagram.

In the figure, 1 is a socket body made of synthetic resin, and this socket body 1 has a recess 2 at one end for inserting a lamp.
It has a cylindrical shape with an open bottom. A flange portion 3 is integrally provided on the outer periphery of the bottom side of the socket body 1, and a pair of flange portions are provided at two opposing locations on the outer periphery of the opening side that are spaced apart from the flange portion 3 in the axial direction. The locking pieces 4, 4 are integrally provided in a protruding manner. The socket body 1 as described above is designed to be removably inserted into a mounting hole 6 formed in a printed circuit board 5, and the locking pieces 4, 4 are inserted into the opening periphery of the mounting hole 6. A possible notch (not shown) is provided. Therefore, the socket main body 1 is rotated in the circumferential direction after the locking pieces 4, 4 are inserted into the mounting hole 6 in alignment with the notches, and this rotation causes the locking pieces 4, 4 to engage with each other. The mounting portion 6 is fixed to the printed circuit board 5 by pressing the opening peripheral portion of the mounting portion 6, which has no notch, between the flange portion 3 and the flange portion 3.

Into the recess 2 of the socket body 1, one end of a baseless metal light bulb 7 is fitted and held. The baseless metal light bulb 7 is constructed by arranging a filament 9 within a bulb 8, sealing one end of the bulb 8, and allowing lead wires 10, 10 connected to the filament 9 to pass through the sealed portion and lead out to the outside. It has been done. Therefore, the lead wires 10, 10 are led toward the bottom surface of the recess 2.

On the other hand, terminal insertion holes 11, 11 are provided at two opposing locations on the flange portion 3.
Hollow cylindrical current-carrying terminals 12, 12 are caulked into the terminal insertion holes 11, 11, respectively.
When fixed to the printed circuit board 5, it comes into contact with a power supply piece (not shown) provided on the back surface of the printed circuit board 5. A split groove 13 is provided on the bottom surface of the socket body 1, and extends in a direction directly connecting the current-carrying terminals 12, 12. It is formed to exceed the Further, a jig for rotating the socket body 1, such as a flathead screwdriver 14, is inserted into the groove 13. Lead wire lead-out holes 15, 15 are formed in the bottom wall of the recess 2 of the socket body 1, and these lead wire lead-out holes 15, 15 are opened in the bottom surface of the split groove 13 at a distance in the direction of the groove. .
The lead wires 10, 10 led out from the end of the valve 8 are led out to the outer bottom side of the socket body 1 through the lead wire lead-out holes 15, 15, and are then led out along the bottom surface of the split groove 13 in opposite directions, respectively. The tip ends thereof are guided between the inner surfaces of the terminal insertion holes 11, 11 and the current-carrying terminals 12, 12, and are clamped and fixed there. A protrusion 16 is integrally provided on the bottom surface of the split groove 13 at approximately the center between the lead wire outlet holes 15, and the protrusion height of the protrusion 16 is equal to that of the lead wire. The height is set to exceed the wire diameter of the wires 10, 10.

According to this configuration, when mounting the socket body 1 on the printed circuit board 5, it is necessary to insert the socket body 1 into the mounting hole 6 and then rotate it. This is done by inserting the driver 14 into the groove 13 at the bottom of the . In this case, the lead wires 10, 10 are already attached inside the split groove 13;
Since a protrusion 16 with a height exceeding the wire diameter of the lead wires 10, 10 is provided at approximately the center of the bottom surface of the split groove 1,
The tip of the driver 14 inserted into the screwdriver 3 comes into contact with the top of the protrusion 16. Therefore, the lead wire 1 passed along the bottom surface of the split groove 13
There is no risk of the sharp tip of the driver 14 coming into contact with the lead wires 10, 10, and there is an advantage that breakage of the lead wires 10, 10 can be prevented.

The present invention is not limited to the first embodiment described above, and the second embodiment of the present invention is shown in FIGS. 5 and 6.
An example is shown. In this second embodiment, a groove 21 other than the above-mentioned groove 13 is formed on the bottom of the socket body 1.
These grooves 1 are provided in a direction perpendicular to the grooves 13.
A protrusion 22 having a height exceeding the wire diameter of the lead wires 10, 10 is provided at the intersection of the lead wires 3 and the grooves 21. This has the advantage that not only the minus screwdriver 14 but also the plus screwdriver 23 can be used as a jig.

[Effect of idea]

As detailed above, according to the present invention, a jig for rotating the socket body is inserted into the bottom of the socket body, and the jig has a depth exceeding the wire diameter of the lead wire of the baseless light bulb. A groove to which the lead wire is attached is provided, and a protrusion having a height exceeding the wire diameter of the lead wire is provided on the bottom surface of the groove. According to this, since the groove into which the jig is inserted and the groove into which the lead wire is attached can be shared, the structure of the socket body can be simplified. Moreover, in this case, since the tip of the jig comes into contact with the top of the protrusion, there is no risk that the sharp tip of the jig will come into contact with the lead wire passed through the split groove. This has excellent effects such as being able to prevent wire breakage.

[Brief description of the drawings]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a sectional view, FIG. 3 is a sectional view taken along the line - in FIG. Figure 4 is a view taken along the line - in Figure 2, Figures 5 and 6 show a second embodiment of the present invention, Figure 5 is a sectional view, and Figure 6 is a view taken along the line - in Figure 5. FIG. DESCRIPTION OF SYMBOLS 1... Socket body, 2... Recessed part, 3... Flange part, 4... Locking piece, 5... Mounting member (printed circuit board), 6... Mounting hole, 7... Plain metal bulb,
12... Current-carrying terminal, 13, 21... Division groove (other division groove), 14, 23... Jig (driver), 15...
Through hole (lead wire lead-out hole), 16, 22... protrusion.

Claims (1)

[Scope of utility model registration request] A cylindrical socket body with a bottom having a concave portion in which a baseless light bulb is housed; a flange portion and a locking piece formed facing each other at a predetermined distance from an outer wall of the socket body; and a bottom portion of the body. a lead wire through hole formed in the base and through which the lead wire of the baseless metal bulb is passed;
A socket for a baseless light bulb, which is provided on the bottom surface of the main body with a split groove that communicates with the through hole, passes through the center of the bottom surface and faces the flange, guides the lead wire, and into which a jig for rotating the socket main body is inserted. In the above-mentioned split groove, the depth of the groove exceeds the wire diameter of the lead wire, and a protrusion with a height exceeding the wire diameter of the lead wire is formed near the center of the bottom surface. Light bulb socket.