JPH051188U - Light bulb socket - Google Patents

Abstract

(57) [Abstract] [Purpose] To reliably prevent occurrence of electrical accidents such as a short circuit even when the contact piece 1C moves freely with respect to the socket body 1A or the fixed shaft 7 loosens. [Structure] A thin insulating material 6 is formed on the inner bottom of the socket body 1A.
And the contact piece 1C provided on the socket body 1A is arranged on the outside of the center of the insulating material 6.
Shaft 7 for inserting the socket into the center of the inner bottom of the socket body 1A
Fix with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a light bulb socket used for a floodlight and other applications.

[0002]

[Prior Art]

 Conventionally, in this type of socket, as shown in FIG. 3, a cylindrical receiving port B is disposed inside the socket body A, and a part of an inner edge of the receiving port B is attached to an inner bottom portion of the socket body A. The contact piece D is disposed on the inner bottom portion of the socket body A, and the contact piece D is disposed on the inner bottom portion of the socket body A. A position deviated from the central portion of the socket body A is fixed by a fixed shaft E including a screw shaft also used as a power source side connection terminal. Then, a base G to which one side electrode of the light bulb F is connected is screw-connected to the receiving port B, and a projecting piece H to which the other side electrode of the light bulb F is connected is brought into contact with the contact piece D. As a result, the bulb F is energized.

[0003]

[Problems to be solved by the device]

 However, in the above socket, since the contact piece D arranged on the inner bottom portion of the socket body A is fixed by the fixed shaft E at a position deviated from the central portion of the socket body A, Due to the slight vibration of the socket body A and the unexpected looseness of the fixed shaft E, when the light bulb F is screwed and connected to the socket body A, the frictional resistance between the projection H of the light bulb F and the contact piece H causes When the contact piece H moves or the fixed shaft E becomes loose, especially when the light bulb F is strongly screwed, the frictional resistance between the projecting piece H and the contact piece H becomes large, and The fixed shaft E was easily loosened, and the loosened fixed shaft E sometimes caused an electrical accident such as a short circuit. The present invention has been made in view of the above problems, and its purpose is to prevent an electrical accident such as a short circuit even when the contact piece moves freely with respect to the socket body or the fixed shaft loosens. It is to provide a bulb socket that can be reliably prevented.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, a contact for screwing a cap to which one side electrode of a light bulb is connected and a protruding piece to which the other side electrode of the light bulb is connected, in the socket body. In a socket for a light bulb provided with a piece, a thin insulating material is arranged on the inner bottom of the socket body, and the contact piece is arranged outside the center of the insulating material. It is characterized by being fixed with a fixed shaft that is inserted through the center of the inner bottom of the.

[0005]

[Action]

 In the above socket, a thin insulating material is arranged on the inner bottom of the socket body, and the contact piece is arranged outside the center of the insulating material. Since it is fixed with a fixed shaft that is inserted through the center of the bottom part, loosening of the fixing screw or the light bulb is strongly screwed into the socket body due to slight vibration of the socket, and the protrusion of the light bulb Even if a large frictional resistance occurs between the contact piece and the contact piece, even if the contact piece moves freely or the fixed shaft loosens, a short-circuit accident is prevented. The insulating material interposed between the inner bottom portion of the socket body and the socket bottom surely prevents an electrical accident such as a short circuit.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an embodiment in which the light bulb socket of the present invention is adopted as a light projector. The light bulb socket 1 shown in FIG. 2 is connected to the power source side inside the socket body 1A made of a rubber material. A cylindrical socket 1B for screwing a light bulb, to which one side of the terminal is connected, and a contact piece 1C to which the other side of the power supply side connecting terminal is connected, are provided, and the length of the socket body 1A is provided on the outer peripheral portion thereof. A plurality of U-shaped recessed engagement grooves 1D extending in the direction are formed. The socket 1B provided in the socket body 1A has its inner end edge portion extending along the inner bottom portion of the socket body 1A, as shown in FIG. The protruding portion is fixed by a fixed shaft 1E, which is a screw shaft that also serves as a power source side connection terminal.

Reference numeral 2 denotes a light bulb, which includes a base 2A screwed into a socket 1B of the socket body 1A and connected to one side of an electrode, and a protrusion 2B connected to the other side electrode of the light bulb 2. The bulb 2A of the light bulb 2 is screwed into the socket 1B of the socket body 1A, and the projection 2B of the bulb 2 is brought into contact with the contact piece 1C so that the bulb 2 is energized. I have to.

Reference numeral 3 denotes a bottomed cylindrical holder having an opening 3 A on one side in the length direction, and a plurality of protrusions that engage with the respective engagement grooves 1 D of the socket 1 on the inner wall of the holder 3. The engagement protrusions 3B are integrally formed, and the engagement protrusions 3B are engaged with the engagement grooves 1C, so that the socket 1 is press-fitted and retained in the holder 3. Reference numeral 4 denotes a parabolic reflector which is mounted on the outer peripheral portion of the opening 3A of the holder 3 in order to project the light flux of the light bulb 2 in a desired direction in a concentrated manner. Has a guard 5 attached.

Therefore, in the light bulb socket 1 having the above-described configuration, as is clear from FIG. 1, the inner bottom portion of the socket body 1A is covered with the inner end extending portion of the receptacle 1B. An insulating material 6 such as a bakelite plate containing glass is arranged, and the contact piece 1C bent in a substantially U shape is arranged outside the center of the insulating material 6, and the insulating material of the contact piece 1C is arranged. The portion facing 6 is fixed by a fixed shaft 7 formed of a screw shaft also serving as a power supply side connecting terminal which is inserted through the center of the inner bottom of the socket body 1A. In the figure, a fixed shaft 1E for fixing the socket 1B and a fixed shaft 7 for fixing the contact piece 1C are penetrated through the inner bottom portion of the socket body 1A, and the fixed shafts 1E, 7 The screw ends 8, 8 are screwed to the penetrating end of the.

With the above configuration, even if the socket body unexpectedly loosens the fixed shaft due to slight vibration or the like, the contact piece 1C does not come into contact with the socket 1B. 2 may be strongly screwed into the socket 1B of the socket body 1A and a large frictional resistance may be generated between the protruding piece 2B of the light bulb 2 and the contact piece 1C. Is disposed at the center of the inner bottom portion of the socket body 1A and is fixed by a fixed shaft that is inserted through the center of the inner bottom portion of the socket body 1A. Therefore, the contact piece 1C is arbitrarily moved or the fixing is performed. Even if the shaft 7 is loosened, an electrical accident such as a short circuit is reliably prevented. Further, the insulating material 6 interposed between the contact piece 1C and the inner bottom portion of the socket body 1A surely prevents an electrical short between the receptacle 1B and the contact piece 1C. To be done. Further, in the embodiment of FIG. 1, a partition wall 1F defining a penetrating portion of each fixed shaft 1E, 7 is provided on the outer side of the socket body 1A through which each fixed shaft 1E, 7 penetrates. The partition wall 1F prevents an electrical short circuit or the like on the outside of the fixed shafts 1E, 7 penetrating therethrough.

[0011]

[Effect of the device]

 As described above, according to the light bulb socket of the present invention, a thin insulating material is provided on the inner bottom portion of the socket body, and the contact piece provided on the socket body is provided outside the center of the insulating material. Since the contact piece is arranged and fixed by the fixed shaft that is inserted through the center of the inner bottom of the socket body, the contact piece moves freely with respect to the socket body or the fixed shaft loosens. Even in such a case, it is possible to reliably prevent an electrical accident such as a short circuit.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a bulb socket according to the present invention.

FIG. 2 is a vertical sectional view of a floodlight adopting the same socket.

FIG. 3 is a partially omitted sectional view showing a conventional example.

[Explanation of symbols]

 1A Socket body 1B Receptacle 1C Contact piece 2 Light bulb 2A Base 2B Projection piece 6 Insulation material 7 Fixed shaft

Claims (1)

[Claims for utility model registration] [Claim 1] Inside of the socket body, a socket to which one side electrode of the light bulb is connected, and a projecting piece to which the other side electrode of the light bulb is connected In a socket for a light bulb provided with a contact piece, a thin insulating material is provided on the inner bottom portion of the socket body, and the contact piece is provided on the outside of the center of the insulating material. A light bulb socket characterized by being fixed by a fixed shaft that is inserted through the center of the inner bottom of the socket body.