JPH081819B2 - Electrical connection device for lighting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention comprises a pin-type plug on the end of the pipe attached to the lighting fixture, with establishing electrical connection by inserting the plug into the outlet, but also the instrument body for supporting Can be installed on the ceiling, walls, etc.
The present invention relates to an electrical connection device for a lighting fixture, which can be easily installed from the outside .

[0002]

2. Description of the Related Art Most conventional devices for inserting a pin-type plug into an outlet are used as a connecting means for a low-voltage signal electric circuit, and a line bolt (commercial 10
There were few cases where it was used as a connecting means for a power circuit such as 0 V). Only the plug, which is a conductor, was inserted into the hole of the outlet, and most of the plug remained exposed to the outside even while the plug was in contact with the electrode.

[0003]

When a pin type plug is inserted into an outlet as a connecting means for a line bolt, most of the conductive portion of the plug is exposed even when the plug is in contact with the electrode of the outlet. Therefore, it is dangerous to pinch this portion with fingers and insert it, and it is expected that the operator will feel uncomfortable. In addition, even if a pin-type plug is inserted into an outlet, it does not have the function of supporting the instrument body, and if force is applied in the direction perpendicular to the axis of the holder part of the plug after inserting the plug, this force is also applied to the inserted plug itself. There is a risk that a force such as twisting or rubbing may act on the contact portion between the plug and the electrode on the outlet side to exert an adverse effect.

Therefore, the present invention prevents the fingers from touching the energized plug when the plug is inserted, and
It also supports the body of the device, and even if a force is exerted on the shaft exposed to the outside of the plug side, it does not adversely affect the electrical connection point, and it is easy to attach the outlet from the outside
It is an object of the present invention to provide an electrical connection device for a lighting fixture that can perform work .

[0005]

In order to achieve the above-mentioned object, the present invention is directed to a pipe for supporting two main parts of a lighting fixture through which two lead wires connected to a light bulb socket are inserted. A tubular plug conductor to which one lead wire is connected, and a center pin, which is inserted into the center of the plug conductor and to which the other lead wire is connected, are attached to an end via a holder made of an insulating material, and the instrument body is attached. The center pin is inserted into an outlet that is mostly embedded in the mounting part such as the ceiling, and the center pin is inserted to make contact with the inner electrode cylinder and the plug conductor is provided with an electrode ring to make contact, and the holder is inserted tightly below the electrode ring. The insertion hole is formed so that the depth of the insertion hole is longer than or slightly shorter than the length of the plug conductor attached to the holder and exposed, and when the plug conductor and the electrode ring make contact, the plug conductor is It is constructed so that it does not come out or is exposed to the extent that it cannot be touched by a finger, and it is screwed into a screw rod rotatably provided on the flange portion of the outlet, and by the rotation operation of this screw rod, it is lowered in the height direction of the outlet and the flange is formed. It is provided with a holding member that holds the mounting portion such as the ceiling in cooperation with the holding member.

[0006]

According to the present invention, the plug conductor is inserted into the insertion hole of the outlet by pinching the end portion of the pipe with fingers, and the plug conductor is inserted into the insertion hole even if the plug conductor comes into contact with the electrode ring and comes into contact with the power supply side. Is not exposed to the outside, or is exposed only to the extent that it cannot be touched by a finger even if exposed. Therefore, when the plug is inserted into the outlet and when the plug is pulled out, the contact of the fingers with the plug conductor in the contact state on the power source side is prevented.
Also, since the holder is inserted into the insertion hole and the electrical connection is complete in this state, even if a force acts in the direction orthogonal to the axis of the pipe with the plug completely inserted in the outlet,
This force is received at the position of the holder, and since the holder itself is tightly set in the insertion hole, it does not adversely affect the electrical connection.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. In the embodiment shown in FIG. 1, a plug conductor 2 that constitutes a plug at an end of a pipe 1 that supports a lighting fixture body 26 (described later) and the plug conductor 2
A center pin 3 to be inserted in the center of is attached via a holder 4 made of an insulating material. The outlet 5 is provided, for example, on the inside of the ceiling 100, and an inner electrode cylinder 6 is provided in which the center pin 3 is inserted and comes into contact with the outlet 5, and the plug conductor 2 is inserted into and makes contact with the outer periphery of the electrode cylinder 6. An electrode ring 7 is provided. In the structure of the outlet 5, a notched groove 9 having a predetermined height is formed vertically at the symmetrical position of the cover 8, and a lower end of the cover 8 is attached to a flange 10 formed on the lower side. This collar part 10
And the screw rod 12 between the collar portion 11 provided inside the cover 8
Is provided. The lower end side of the threaded rod 12 is rotatably attached to the portion of the collar portion 10 so as not to fall out,
The upper end of the screw rod 12 is rotatably supported and attached to the collar portion 11 so as not to fall off. The proximal end side of the holding member 13 is screwed and attached to the screw portion of the screw rod 12. By rotating the screw rod 12 in one direction, the sandwiching member 13 descends and cooperates with the flange portion 10 to sandwich the ceiling 100. That is, the sandwiching member 13 and the flange portion 10 fix the outlet 5 in the ceiling in a buried state . A protrusion 13A is formed on the lower surface of the holding member 13 on the front end side, and the protrusion 13A bites into the ceiling 100 to firmly attach the outlet 5. A cord 14 for connecting to the power source is provided on the electrode cylinder 6 and the electrode ring 7.
One end of is connected. A holder 4 is provided below the electrode ring 7.
Has an insertion hole 15 having a constant stroke and is densely inserted, and the lower end of the cylindrical portion 16 defining the insertion hole 15 is extended below the outlet 5 and the extended cylindrical portion is formed. A male screw 17 is formed on the outer circumference of 16. The pipe 1
A ring 19 is formed inside the decorative cover 18 that is rotatably fitted to the end of the ring 19, and a female screw 20 is formed on the inner peripheral surface of the ring 19. This female screw 20 and male screw 17
And are screwed together to ensure reliable support of the instrument body 26 attached to the pipe 1.

FIG. 2 shows the details of the plug side, in which a center pin 3 is inserted in the center of the plug conductor 2 and the lower end of the plug conductor 2 in which the center pin 3 is inserted is placed on the upper end of a holder 4 made of an insulating material. Mate with screws. Center pin 3
A pin holder 3A made of resin is attached to this, and the lead wire 21 connected to the plug conductor 2 enters into the groove formed in the axial direction of the pin holder 3A. One end of another lead wire 22 is connected to the center pin 3.
The other ends of the lead wires 21 and 22 are connected to a light bulb socket (not shown) of the instrument body 26. As shown in the drawing, the plug conductor 2 is screwed into a female screw formed on the inner peripheral surface of the upper end of the holder 4, but a screw 23 made of an insulating material is attached to the outside of the holder 4 so that the plug conductor 2 does not rotate in the direction of coming out. Screw it toward the plug conductor 2. The lower end side of the holder 4 is screw-fitted to the pipe 1, and a screw 24 prevents relative rotation between the two. Further, the decorative cover 18 is fitted on the end portion side of the pipe 1, and the decorative cover 1
A retaining ring 25 is attached to the pipe 1 to prevent the falling of the pipe 8. A ring 19 is formed at the center of the decorative cover 18. FIG. 3 shows the assembled state of the one shown in FIG. An insertion hole 15 into which the holder 4 is inserted is provided below the electrode ring 7, and the depth of the insertion hole 15 is substantially the same as or longer than the length of the exposed plug conductor 2, or the depth of the insertion hole 15 is small. Is formed to be slightly shorter than the length of the plug conductor 2. FIG. 1 shows a plug conductor 2
The tip of the holder is just about to enter the electrode ring 7, and in this state, the lower end of the tubular portion 16 and the holder 4
The distance t from the upper end of the plug conductor 2, that is, the exposed portion of the plug conductor 2 in this state is about 3 mm at maximum. The length of the holder 4 is formed to be the same as the depth of the insertion hole 15. Further, the upper end side of the holder 4 is formed in the tapered portion 4A so that the holder 4 can be easily inserted into the insertion hole 15. Further, a collar 19A is formed on the lower end side of the ring 19 and the collar 1A
9A comes into contact with the lower end side of the holder 4, and when the ring 19 is screwed into the male screw 17, the pipe 1
Also, the holder 4 is prevented from being pulled out.

FIG. 4 shows a state in which the luminaire main body 26 is connected to the pipe 1 through the joint joint 27, and the pipe 1 is inserted into the outlet 5. Reference numeral 28 is a knob for rotating the joint joint 27. Further, reference numeral 101 indicates a mounting hole formed in the ceiling 100.

[0010]

As described above, according to the present invention, one lead wire is attached to the end portion of the pipe through which the two lead wires connected to the light bulb socket are inserted and which supports the main body of the lighting fixture. A cylindrical plug conductor to be connected and a center pin inserted in the center of the plug conductor and connected to the other lead wire are attached via a holder made of an insulating material,
The center pin is inserted into the outlet and contacts with the inner electrode cylinder and the plug conductor is provided with an electrode ring that contacts and the insertion hole is formed below the electrode ring to insert the holder. The length of the plug conductor that is attached to and exposed at or slightly shorter than that of the plug conductor, and when the plug conductor and the electrode ring make contact, the plug conductor is not exposed from the insertion hole or is exposed to the extent that it cannot be touched by a finger. Therefore, when the plug is inserted into the outlet, there is no possibility that the operator's finger touches the plug conductor while the plug conductor is energized. In addition, since the holder made of insulating material is tightly inserted in the insertion hole, even if a force is applied from a direction perpendicular to the axis of the pipe attached to the holder or a diagonal direction, this force is not received at the holder. Since the holder is housed in the insertion hole, it does not adversely affect the electrical connection, that is, the contact portion between the electrode ring and the plug conductor and the contact portion between the center pin and the inner electrode cylinder. Further, the instrument body supported by the pipe is also supported by inserting the plug on the end side of the pipe into the outlet. Also, extend the lower end of the cylinder that defines the insertion hole below the outlet,
In the case where a male screw is formed on the outer periphery of the extended cylindrical portion and a female screw which is screwed to the male screw on the outer periphery of the cylindrical portion is formed on the inner peripheral surface of the ring fitted to the end portion side of the pipe, The attachment to the outlet is strong, and therefore, the support of the lighting fixture main body supported by the pipe is even more reliable. Further, according to this invention, the base end side of the sandwiching member is screwed and attached to the threaded portion of the screw rod, and the sandwiching member descends by rotating the screw rod in one direction from the outside of the ceiling. The ceiling can be clamped in cooperation with the parts, that is, the outlet can be easily fixed in the ceiling by the clamping member and the collar, so that the mounting workability is greatly improved. effective.

[Brief description of drawings]

FIG. 1 is a half sectional view showing a preferred embodiment of the present invention.

FIG. 2 is an exploded perspective view of a plug side.

FIG. 3 is a perspective view showing an assembled state of a plug side.

FIG. 4 is a front view showing a state in which a plug is inserted into an outlet and a lighting fixture is supported.

[Explanation of Codes] 1 Pipe 2 Plug Conductor 3 Center Pin 4 Holder 5 Outlet 6 Inner Electrode Tube 7 Electrode Ring 10 Collar 12 Screw Rod 13 Supporting Member 15 Insertion Hole 16 Cylindrical Part 17 Male Thread 19 Ring 20 Female Thread 21, 22 Lead Wire 26 Instrument body

Claims (2)

[Claims] 1. A main body (26) for lighting, which is inserted with two lead wires (21, 22) connected to a light bulb socket.
At the end of the pipe (1) supporting the
1) A cylindrical plug conductor (2) to which is connected, and the other lead wire (22) inserted in the center of the plug conductor (2)
A center pin (3) to which is connected is attached via a holder (4) made of an insulating material, and most of the instrument body (26) is embedded in an attachment part such as a ceiling (100) in an outlet (5). A center pin (3) is inserted into and contacts the inner electrode tube (6) and an electrode ring (7) into which the plug conductor (2) is inserted and contacts, and the holder (4) is placed below the electrode ring (7). An insertion hole (15) that is tightly inserted is formed, and the depth of the insertion hole (15) is formed so as to correspond to the length of the plug conductor (2) which is attached to the holder (4) and exposed. When the (2) and the electrode ring (7) are in contact with each other, the plug conductor (2) is not exposed from the insertion hole (15) or is exposed to the extent not touched by a finger, and the flange portion of the outlet (5) is provided. The screw rod (12) rotatably provided in (10) is screwed. When the screw rod (12) is rotated, it is lowered in the height direction of the outlet (5) and the collar (10) is moved.
An electrical connection device for a lighting fixture, comprising a holding member (13) for holding a mounting portion such as a ceiling (100) in cooperation with the holding member (13). 2. A cylindrical portion (1 ) defining the insertion hole (15).
The lower end of 6) is extended below the outlet (5) , a male screw (17) is formed on the outer periphery of the extended tubular portion (16), and it is rotatably fitted to the end side of the pipe (1). Ring
On the inner peripheral surface of (19) , there is a male thread (17) on the outer circumference of the cylindrical portion (16 )
The electrical connection device for a lighting fixture according to claim 1, characterized in that a female screw (20) is formed to be screwed into the.