JPH0218941Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a conductive plate used in a screw socket for connecting light bulbs with screw caps such as small bulbs used in lighting equipment, and is particularly applicable to switches etc. This invention relates to a conductive plate used in a screw socket used in a wiring block that is integrated into a block.

[Prior Art] For example, a conventional screw socket disclosed in Japanese Utility Model Application Publication No. 56-153022 was constructed as shown in FIGS. 5 and 6.

That is, the conventional screw socket includes a main body 1 in which a switch part and the like are integrally formed, and the main body 1 is provided with a plate-shaped conductive plate support part 2.
The conductive plate support portion 2 is integrally formed with a protruding cylindrical portion 3 having a threaded portion on the inner periphery into which a screw cap is screwed. The conductive plate support part 2 has insertion holes 4 and 5 that penetrate into the cylindrical part 3, and a conductive plate 6 made of an elastic conductive material is mounted thereon. This conductive plate 6 is provided with a middle piece 7 formed by bending, and when the middle piece 7 is a blank plate.
A bent side piece 8 is provided extending in a direction perpendicular to the direction of extension.

In addition, a plurality of circuit patterns having functional parts such as switch contacts are formed on the conductive plate 6. For example, one switch fixed contact 9 is formed integrally with the middle piece 7. Such a plurality of circuit patterns are temporarily connected by a plurality of connection pieces 10. Among these plurality of circuit patterns, pattern 11 is a detour portion in which side piece 8 is detoured. Then, the conductive plate 6 inserts the middle piece 7 into the insertion hole 4.
Then, insert the side pieces 8 into the insertion holes 5 and attach them to the conductive plate support 2 to attach the cover (not shown).
It is sandwiched between. At that time, the middle piece 7 is
The tip inserted inside is further bent to form the cylindrical part 3.
Each circuit pattern is separated by positioning a contact piece at the inner bottom of the circuit and cutting the plurality of connecting pieces 10.

The conductive plate 6 as described above is used to manufacture a conventional screw socket, and the completed screw socket is assembled into a lighting fixture, and a miniature bulb with a screw base is screwed into the cylindrical part, and the base is inserted into the inside. Contact piece 7 and side piece 8.

[The problem that the idea aims to solve]

In the conductive plate used in the conventional screw-in socket as described above, the middle piece 7 and the side piece 8 are formed in such a shape that they are perpendicular to each other when the base plate is a flat plate. Since the shapes of the middle piece 7 and the side pieces 8 occupying a large area are almost T-shaped and complicated, the loss of material increases. In addition, especially in the case of a wiring block that requires a detour as described above, there is a problem in that material removal becomes difficult and the blank size of the conductive plate 6 is required to be large. Also,
In general, elastic conductive materials such as phosphor bronze have different mechanical properties such as elastic limit depending on the rolling direction of the material. Therefore, even if either the middle piece 7 or the side piece 8 is formed to have good mechanical properties, the other will deteriorate and the properties of the material cannot be used efficiently, so it is necessary to increase the plate thickness. It was hot.

Furthermore, since the middle piece 7 and the side pieces 8 are simply formed by bending a part of the conductive plate 6, the closer the tip of the base of the miniature ball is to the conductive plate 6 in the height direction, the more the middle piece 7 or the side piece 8 can be short, but on the other hand, it becomes longer as it moves away from the conductive plate 6, so the sides of the T-shape become longer and material removal becomes even worse. That is, there was a problem in that the position of the miniature bulb with respect to the conductive plate 6, in other words, the position of the miniature bulb in the height direction within the lighting fixture, resulted in restrictions on the material removal for the conductive plate. Furthermore, since the middle piece 7 and the side pieces 8 are close to each other, especially at the base of the bend, there is a problem that it is difficult to maintain a sufficient insulation distance.

The present invention was made to solve these conventional problems, and it is easy to use materials, makes effective use of the mechanical properties of the materials, and can be made thinner. To provide a conductive plate for a screw socket, which can reduce restrictions on the position of a miniature ball, etc., and can easily secure an insulation distance between a middle piece and a side piece.

[Means to solve the problem]

The present invention is a conductive plate used in a screw socket consisting of a main body forming a cylindrical part into which a cap is attached, and the base plate is connected to a middle piece disposed at the bottom of the cylindrical part and the middle piece. a side piece formed to extend in the same direction and arranged to be exposed on the inner circumferential portion of the cylindrical part, and an imaginary line in the same direction as the direction in which either the middle piece or the side piece extends. It is characterized in that it is formed by being bent through a rising portion that is bent along.

[Effect]

According to a conductive plate having such a structure, the middle piece and the side pieces are positioned adjacent to each other in parallel in the state of the blank plate, so there is little material loss of the blank plate, and the middle piece and the side pieces are arranged in the same direction. Since the material is elongated, both materials can be rolled in the same rolling direction, which has good mechanical properties, and this improves the properties and makes it possible to make the plate thinner.

〔Example〕

Hereinafter, the conductive plate used in the screw socket of the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings.

1 to 4, a conductive plate 30 according to an embodiment of the present invention is shown together with the main body of a screw socket. A main body 20 of this screw-in socket has a switch part etc. integrally formed therein, and a conductive plate support part 21 is formed in the main body 20. A bottomed cylindrical portion 22 is formed protruding from both surfaces of the conductive plate support portion 21 . Threaded portions 23 are provided at four locations on the inner periphery of the cylindrical portion 22, and side piece storage chambers 24 are formed at the sides of the cylindrical portion 22 to communicate with the interior of the cylindrical portion.

Furthermore, a presser projection 25 is formed on the conductive plate support portion 21 so as to protrude toward the bottom side of the cylindrical portion 22 . Insertion holes 26 and 27 are formed at the bottom of the cylindrical portion 22 .

Incidentally, the conductive plate 30 on which the fixed switch contacts and the like are integrally formed has a middle piece 31 and a side piece 32 formed at positions substantially facing each other in the same plane. That is, the middle piece 31 is connected to the middle piece 31 and the side pieces 32.
On the other hand, the side piece 32 is formed so as to be connected to the rising part 33 that is bent along a line parallel to the line that connects the rising part 33, and after being bent to the opposite side of the rising part 33, that is, to the lower side, the side piece 32 is further bent toward the tip side. are folded upward to form a V-shape, so that they almost face each other. In the conductive plate 30 at this stage, a connecting piece 3 temporarily connects a plurality of circuit patterns.
4 is provided.

Such a conductive plate 30 is mounted and supported on the conductive plate support part 21, but at this time, the middle piece 31 is attached to the cylindrical part 22.
It is inserted into the insertion hole 26 at the bottom of the holder, and its base is placed on the presser projection 25. In addition, the side piece 32
is accommodated in the side piece accommodating chamber 24 through the insertion hole 27, and the tip of the side piece 32 is located on the inner peripheral surface of the cylindrical portion 22 and exposed. Thereafter, as shown in FIG. 2, the cover 35 is fixed to the main body 20 from the bottom side of the cylindrical portion 22, so that the conductive plate 30 is sandwiched between the main body 20 and the cover 35. Then, the connecting piece 34 is cut to separate each circuit pattern, and the tip of the middle piece 31 is folded back and positioned near the bottom of the cylindrical part 22. As a result, when the miniature ball is screwed into the cylindrical portion 22, the base of the miniature ball comes into contact with the middle piece 31 and the side piece 32.

In a conductive plate constructed in this manner and used for a screw socket, the material of the middle piece 31 and the side pieces 32 is as shown in FIG. That is, in the flat blank plate before the middle piece 31 and the side pieces 32 are bent into a predetermined shape,
As shown in FIG. 4, the middle piece 31 and the side pieces 32 are arranged in parallel at a position where their centers are shifted by the height of the rising part 33, and the shape surrounding the middle piece 31 and the side pieces 32 is a square. becomes. Therefore, the material loss of the blank plate is only due to the small gap between the middle piece 31 and the side piece 32. Moreover, since the material is removed from the middle piece 31 and the side piece 32 from the same direction, the material can be removed in a direction that provides good mechanical properties such as elastic limit for both of them with respect to the rolling direction of the blank sheet. That is, the spring material is
There is a difference in mechanical properties when material is taken in the rolling direction and in a direction perpendicular to this, so by aligning the directions of the middle piece and side piece as mentioned above, In both cases, material can be removed in the direction with better properties. As a result, the properties of the base plate can be used effectively, and the mechanical properties of both improve, making it possible to make the plate thinner. Furthermore,
Since the middle piece 31 is lowered from the conductive plate 30 by the height of the rising portion 33, the length of the miniature bulb protruding from the main body 20 is reduced, and the heightwise position of the miniature bulb in the lighting equipment can be lowered. The height of this rising portion 33 is set according to the lighting equipment to be incorporated.

Furthermore, the bent ends of the middle piece 31 and the side pieces 32 have a height difference equal to the height of the rising portion 33, so that an insulation distance between them can be easily secured. In addition, since the side piece 32 is located at the center in the height direction of the cylindrical part 22 of the conductive plate 30, the bending height of the side piece 32 is lower than that when the side piece 32 is bent from the bottom of the cylindrical part 22. It becomes easier to insert the

In addition, although the rising part 33 was provided on the middle piece 31 side in the above-mentioned Example, it can also be provided on the side piece 32 side.

By the way, although the conductive plate of the above-mentioned embodiment was described as being used for a screw socket for connecting a miniature bulb, the present invention is not limited to a miniature bulb as long as it has a screw cap. Further, in the above embodiment, a screw socket used for a wiring block having other functions such as a switch was explained.
It can also be applied to a single screw socket. That is, the present invention can be applied to all sockets that can use a conductive plate in which the middle piece and the side piece are formed on a single blank plate.

[Effect of idea]

As mentioned above, according to the conductive plate used in the screw socket of the present invention, the simple structure of providing a rising part on the middle piece or side piece allows for easy material removal from the conductive plate base plate, and the mechanical strength of the material is improved. The characteristics can be used effectively, and as a result, it is possible to make the plate thinner, and there are fewer restrictions on the position of small balls etc. when taking material for the conductive plate, and furthermore, the insulation distance between the middle piece and the side piece can be easily secured. It has a great effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a state in which a conductive plate according to an embodiment of the present invention is assembled into a screw socket body;
FIG. 2 is a sectional view showing the screw socket in which the conductive plate is assembled to the socket body, FIG. 3 is a plan view of the screw socket shown in FIG. 2, and FIG. 4 is a cross-sectional view of the screw socket shown in FIG. 1. A partial plan view showing the positional relationship of the middle piece and side piece of the plate in the blank plate before being bent. Figure 5 is a perspective view showing the conventional screw socket in an assembled state. Figure 6 is the conventional screw socket. FIG. 2 is a plan view showing a flat conductive plate material used in a screw socket. 20... Main body, 21... Conductive plate support part, 22...
...Cylindrical part, 23...Threaded part, 24...Side piece storage chamber, 25...Press projection, 26, 27...Insertion hole,
30... Conductive plate, 31... Middle piece, 32... Side piece,
33...Rising section. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A conductive plate used for a screw socket consisting of a main body forming a cylindrical part into which a cap is attached, the base plate of which is a middle piece disposed at the bottom of the cylindrical part and extending in the same direction as the middle piece. and a side piece formed as a cylindrical part and arranged to be exposed on the inner peripheral part of the cylindrical part, and either the middle piece or the side piece is bent along an imaginary line in the same direction as the direction in which the middle piece or the side piece extends. A conductive plate characterized in that the conductive plate is formed by bending through a raised portion.