JPH076812A - Combination structure of embedded outlet and plug - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A plug that plugs into an electrical outlet to ensure a reliable electrical connection, and that is also excellent in appearance and that allows the pipe that supports the instrument body to rotate around its axis. Provide a combination structure. [Structure] An inner electrode cylinder 6 into which the center pin 3 is inserted and contacts the outlet 5 and an electrode ring 7 into which the plug conductor 2 is inserted and contacts are provided, and the outlet 5 is located at a position corresponding to the electrode ring 7. 5 is provided with a hollow cylindrical mounting portion 17 that projects outward from one surface and has a threaded portion 17A on the outer periphery, and the pipe 1 covers the one surface of the outlet 5 from which the mounting portion 17 projects. The decorative cover 18 to be attached to is rotatably fitted, and at the center of the decorative cover 18, there is a threaded portion 19A to be screwed into the threaded portion 17A of the mounting portion on the inner peripheral surface, and at the time of screwing, the pipe 1 is pulled out in the drawing direction. The nut member 19 having means for preventing movement is integrally provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention inserts a terminal member of a main body of a fixture such as a lighting fixture, for example, a plug of a pendant pipe into an embedded outlet which is attached in a state of being embedded inside a ceiling plate, a wall plate or the like. The present invention relates to a combination structure of an embedded type outlet and a plug, which has an electrical appearance, an aesthetic treatment of the appearance of the outlet where the plug is inserted, and an excellent mechanical holding force on the plug side.

[0002]

2. Description of the Related Art In recent years, in window lighting or store lighting, spot lighting means is frequently used in order to emphasize displayed products and give an accent to the lighting space. Furthermore, the decoration period on windows etc. is relatively short,
Redecoration tends to occur frequently. On the contrary,
As this kind of illuminating means also, it is required to change the spot irradiation position or change the irradiation direction for each pattern change. As a result, there is a bendable structure part such as a joint joint so that the irradiation direction can be changed relatively easily. In addition, an instrument has been developed in which the terminal member is rotatable. Moreover,
With the recent development of small-sized halogen lamps, it has become possible to make small-sized lighting fixtures that are compact and have high brightness and excellent color rendering. However, the above-mentioned various appliances cannot easily change the mounting position on the ceiling plate, the wall plate, etc., and the mechanism such as rotation and rotation is added to each part of the appliance body and the terminal member. Therefore, there has been a demand for a device in which such a mechanism is added and which can be easily attached to and detached from an outlet.

[0003]

A conventional one in which a pin-type plug is inserted into a jack-type outlet is used as a connecting means for a low-voltage signal electric circuit and is used as a line bolt (commercial 100V) such as a lighting fixture. It has not been used as a connecting means for a lighting device, and a device for such a pin / jack type lighting fixture is desired. In addition, no one has found that the electrical connection is reliable and easy, the connection is easy, and the appearance of the connection between the plug and the outlet is excellent.

Therefore, according to the present invention, the plug is inserted into an outlet for reliable electrical connection, and the appearance of the connection between the plug and the outlet is excellent, and the pipe supporting the instrument body is rotated around its axis. Can
It is another object of the present invention to provide a combined structure of an outlet and a plug having excellent mechanical holding power on the plug side.

[0005]

In order to achieve the above-mentioned object, the present invention is directed to an end portion of a pipe through which a lead wire connected to a light bulb socket is inserted and which supports a main body of a lighting fixture.
A cylindrical plug conductor to which one lead wire is connected, and a center pin to be inserted in the center of this plug conductor and to which the other lead wire is connected are attached, Provided with an electrode ring into which the plug conductor is inserted and in contact, and provided with a hollow cylindrical mounting part that protrudes outward from one surface of the outlet and has a threaded portion on the outer periphery at a position corresponding to the electrode ring in the outlet , Rotatably fitting a decorative cover to be attached to the outlet so as to cover one surface of the outlet from which the attaching portion projects, and screw the threaded portion of the attaching portion to the inner peripheral surface at the center of the decorative cover. A nut member having a threaded portion and having a means for preventing movement of the pipe in the pulling direction at the time of screwing is integrally provided.

[0006]

According to the present invention, the plug conductor is inserted into the hollow cylindrical mounting portion to enter the electrode ring in the outlet, and at this time, the center pin also enters the inner electrode tube in the outlet.
Next, bring the decorative cover close to this one surface so as to cover one surface of the outlet where the mounting portion projects, at this time, screw the nut member at the center of the decorative cover into the mounting portion, and screw the nut member to the mounting portion while rotating the decorative cover. . Also, the makeup cover hides one side of the outlet, and the appearance is also good. Furthermore, since the pipe attached to the outlet is rotatable with respect to the nut member and the electrical connection portion is also rotatable, the pipe can be rotated.
Further, after the nut member is attached to the attaching portion, the nut member is provided with means for preventing the movement of the pipe in the pull-out direction, so that the mechanical holding of the plug side is also sufficient.

[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 25 (described later), and this 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 collar portion 10 fix the outlet 5 to the ceiling. 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. One end of a cord 14 for connecting to a power source is connected to the electrode cylinder 6 and the electrode ring 7. An insertion hole 15 into which the holder 4 has a certain stroke and is densely inserted is formed below the electrode ring 7, and a lower end of a cylindrical portion 16 defining the insertion hole 15 extends below the outlet 5. The mounting portion 17 is formed by projecting. A threaded portion 17A is formed on the outer periphery of the extended mounting portion 17. A nut member 19 is formed inside the decorative cover 18 that is rotatably fitted to the end portion side of the pipe 1, and a screw portion 19A is formed on the inner peripheral surface of the nut member 19. These screw parts 17A and 19A are screwed together to form the pipe 1
The support of the instrument main body 25 attached to is secured.

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 20 connected to the plug conductor 2 is inserted into the groove formed in the axial direction of the pin holder 3A. One end of another lead wire 21 is connected to the center pin 3.
The other ends of the lead wires 20 and 21 are connected to a light bulb socket (not shown) of the instrument body 25. 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 22 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 in which it comes out. Screw it toward the plug conductor 2. The lower end of the holder 4 is screw-fitted to the pipe 1, and a screw 23 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 24 is attached to the pipe 1 in order to prevent the falling of the pipe 8. A nut member 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. In FIG. 1, the tip of the plug conductor 2 is on the verge of just entering the electrode ring 7, and in this state, the distance t between the lower end of the tubular portion 16 and the upper end of the holder 4, that is, the plug conductor 2 in this state. The maximum exposed area is about 3 mm. Also,
The length of the holder 4 is 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, the lower end side of the nut member 19 is extended toward the center side to form a collar 19B, and the collar 19B is in contact with the lower end surface of the holder 4. Due to the contact between the collar 19B and the holder 4, the pipe 1 cannot be pulled out with the threaded portions 17A and 19A screwed together. When the holder 4 is not provided, a ring-shaped protrusion (not shown) may be provided around the pipe 1 and the collar 19B may be in contact with the lower surface of the protrusion. This collar 19B is provided with screw parts 17A, 19
It is an example of a means for preventing the movement of the pipe 1 in the pulling-out direction when A is screwed.

FIG. 4 shows a state in which the luminaire main body 25 is connected to the pipe 1 through the joint joint 26, and the pipe 1 is inserted into the outlet 5. Reference numeral 27 is a knob for rotating the joint joint 26. Further, reference numeral 101 indicates a mounting hole formed in the ceiling 100. As shown in FIG. 4, the instrument body 25 is attached to the pipe 1
To attach to the outlet 5 via the, the pipe 1 is further raised from the state shown in FIG. 1, the plug conductor 2 and the center pin 3 are inserted into the electrode ring 7 and the inner electrode cylinder 6, and the holder 4 is inserted into the insertion hole 15. Insert closely. At this time, when the nut member 19 comes to the position of the mounting portion 17, the decorative cover 18
The screw member 19A of the nut member 19 and the mounting portion 1
The threaded portion 17A of No. 7 is screwed. Threaded parts 17A, 19
When the screwing of A is completed, the decorative cover 18 is attached to the outlet 5 so as to cover the lower surface of the outlet 5.

In the illustrated embodiment, by providing the insertion hole 15 and the holder 4, the end portion of the pipe 1 is pinched with fingers and the plug conductor 2 is inserted into the insertion hole 15 of the outlet 5 so that the plug conductor 2 is Even if the electrode conductor 7 is brought into contact with the power supply side and the power supply side is brought into contact, the plug conductor 2 is not exposed to the outside from the insertion hole 15 or is exposed only to the extent that it cannot be touched by a finger (reference numeral t, maximum 3 mm). As a result, the contact of the fingers with the plug conductor 2 in the contact state on the power source side is prevented when the plug is inserted into or removed from the outlet 5. Further, since the holder 4 is inserted into the insertion hole 15 and the electrical connection is completed in this state, even if a force acts in the direction perpendicular to the axis of the pipe 1 with the plug completely inserted in the outlet 5. This force is received at the portion of the holder 4, and the holder 4 itself is tightly accommodated in the insertion hole 15, so that the electrical connection is not adversely affected. The plug conductor 2 may be directly attached to the pipe 1 made of an insulating material without providing the insertion hole 15 and the holder 4. Mounting part 1
7 is provided at a position corresponding to the electrode ring 7 in the outlet 5 so as to project outward from one surface of the outlet 5. Since the insertion hole 15 and the holder 4 are not provided, the insertion stroke is shortened.

[0011]

According to the present invention, the nut member is screwed and attached to the mounting portion, the movement of the pipe in the pulling direction is prevented in this state, and the decorative cover covers one surface of the outlet. The outlet is reliably prevented, the appearance of the plug attachment part of the outlet is improved, and the pipe can be rotated with respect to the decorative cover, and the electrical connection part can also be rotated, so the pipe can be rotated around its axis line. Can be rotated. Further, since the nut member is fastened to the mounting portion by rotating the decorative cover, the nut member can be mounted to the mounting portion with a light force. Furthermore, if there is a gap between the lower collar portion and the decorative cover after reliable electrical connection, it is obvious that the nut member is not attached to the attachment portion.

[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 symbols]

 1 Pipe 2 Plug Conductor 3 Center Pin 4 Holder 5 Outlet 6 Inner Electrode Cylinder 7 Electrode Ring 17 Mounting Part 17A Screw Part 18 Decorative Cover 19 Nut Member 19A Screw Part 19B Tsuba 20, 21 Lead Wire 25 Instrument Main Body

Claims (1)

[Claims] 1. A cylindrical plug conductor to which one lead wire is connected to an end of a pipe through which a lead wire connected to a light bulb socket is inserted and which supports a lighting fixture main body, and a center of the plug conductor. Attach the center pin to which the other lead wire is inserted and connect it, and provide the inner electrode tube that contacts the center pin by inserting it into the outlet and the electrode ring that inserts and contacts the plug conductor, and connect it to the electrode ring inside the outlet. Provide a hollow cylindrical mounting part that protrudes outward from one side of the outlet at the corresponding position and has a threaded portion on the outer circumference on the outlet, and attach it to the outlet so that the pipe covers the one side of the outlet The decorative cover is rotatably fitted, and at the center of this decorative cover, there is a screw part that is screwed into the screw part of the mounting part on the inner peripheral surface, and A combined structure of an embedded outlet and a plug, wherein a nut member having means for preventing movement of the plug in the pulling-out direction is integrally provided.