JPH06236718A - Combination structure of concealed receptacle with plug - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an outlet that has a simple structure with a small number of parts and can be easily attached to and detached from a ceiling plate, etc., and the plug side rotates even after attachment, and the voltage is different. However, it is an object of the present invention to provide a combination structure of an embedded outlet and a plug, which prevents incorrect insertion of the plug into the outlet, and also makes most of the components common to achieve design uniformity and cost reduction. According to the present invention, ring-shaped protrusions 19A and 3A extending toward the center are formed on the outer electrode cylinder 19 on the outlet side and / or the insertion port side of the outlet housing 3, and the protrusions 19A and 3A are formed. The inner diameter is formed in two or more kinds, and the outer diameter of the outer insulating cylinder 18 of the inner electrode cylinder 17 on the outlet side is formed in two or more kinds.
Two or more kinds of outer diameters and inner diameters of the electrode ring 20 on the plug side are formed so as to match the inner diameter of 3A and the outer diameter of the insulating cylinder 18, and the plugs that do not match the diameter cannot be inserted into the outlet body 1. is there.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling plate in which a terminal member of an appliance body of an electric appliance such as a lighting fixture, for example, a plug of a pendant pipe is inserted and embedded in a ceiling plate or a wall plate. The present invention relates to a combined structure of an embedded outlet and a plug that can be attached to a vehicle.

[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, in order to make it easier to use the instrument body to which such a mechanism is added, there has been a demand for an embedded outlet that can be easily attached to and removed from a ceiling plate or the like. By the way, when adopting such an embedded outlet, there are concerns about difficulties in construction. That is, at this type of display construction site, many decorative ceilings are adopted, and the gap between the floor above the floor and the decorative ceiling below is narrow, and there is no room for workers to enter the ceiling behind this gap, In such a case, the lower surface of the ceiling is inserted into the ceiling hole. As an example of the electric device installed in this ceiling hole, there is a technique described in Japanese Utility Model Publication No. 60-29782. This technology relates to a fixture for an embedded installation device, in which a tightening arm screwed at an intermediate position of a screw member is clamped by rotating a screw member facing a lower surface flange of a device body inserted in a ceiling hole. The ceiling material and the like are sandwiched between the flange and the flange by rotating and lowering. Furthermore, there has been a demand for a pin / jack type in which a pin-type plug is inserted into an outlet. For example, in the case of a spotlight lighting fixture, the specifications are changed between low bolt (12V) and line bolt (100V). This leads to an increase in cost, so if the specifications are the same, the plug for the low bolt may be inserted into the outlet for the line bolt, and vice versa. In addition, for the pin / jack type, it is also required from the viewpoint of usability that the plug side is rotated even after the insertion and the removal.

[0003]

According to the structure described in the above publication, the structure is required such as an L-shaped metal fitting for installing the tightening arm and a spring for surely operating the arm. I hate it because it is complicated and has many parts. On the other hand, in the case of a plug / outlet for mechanically holding and electrically connecting the terminal member of the instrument body, a conventional connecting means of this kind, in particular, an outlet structure is a jack type, and elastic contact is made to at least one of the positive and negative electrodes. With a line contact at one place by one piece and using the metal outer circumference of the jack as the charging part, the holding force of the plug is weak,
In addition, there are drawbacks such as low current carrying capacity. Furthermore, in order to reduce costs by sharing most of the parts of the pin / jack type, even for low bolts and line bolts, it is desirable to devise to prevent incorrect insertion of plugs. Has been done. If the plug with the low-bolt device body attached was accidentally inserted into the line-bolt outlet, the device body could be damaged.

Therefore, according to the present invention, the outlet has a small number of parts and has a simple structure, and can be easily attached to and detached from the ceiling plate or the like. Even after the attachment, the plug side rotates and the voltage of the plug is different. Incorrect insertion is prevented,
Moreover, it is an object of the present invention to provide a combination structure of an embedded outlet and a plug, in which most of the components are made common and the design is unified and the cost is reduced.

[0005]

In order to achieve the above-mentioned object, according to the present invention, the plug of the terminal member on the instrument main body side is composed of an electrode rod and an electrode ring provided on a concentric circle around the electrode rod, Is inserted into the outlet body, the electrode rod is inserted into the inner electrode tube to which a wiring cord for connecting to the power supply side is connected, and the concentric circle around the inner electrode tube is provided via an insulating tube, and the electrode ring is inserted into the power supply side. An outer electrode cylinder to which a wiring cord for connection is connected, and a plurality of elastic electrode pieces provided on the inner peripheral surface of the outer electrode cylinder and contacting the outer peripheral surface of the electrode ring in a plurality of vertical directions, The outer casing is made of an insulating material and is provided on the outer periphery of the outer electrode cylinder.Flanges that extend outward in the radial direction are provided at both upper and lower ends of the outlet casing, and the lower end side of the outlet casing is extended to rotate the plug side to the mounting plug side. To allow A mounting means is provided to rotatably hold at least two screw rods inserted from the lower collar portion between the upper and lower collar portions, and to cover the outlet housing and the screw rod and correspond to the side surface of the screw rod. A cover having a notched groove having a predetermined width in the circumferential direction and a predetermined height in the vertical direction is provided at a portion of the peripheral wall, and the base end side of the holding member is screwed to the intermediate portion of each screw rod. Rotate the free end side from the cutout groove of the cover to the outside along with the rotation of the screw rod. The free end side of the holding member is brought into contact with one end of the notch groove in the circumferential direction, and then the screw rod is further rotated to lower the holding member so that the lower collar portion and the holding member sandwich the ceiling plate or the like. Insert the outer electrode tube and / or the outlet housing. A ring-shaped projecting portion extending toward the center is formed on the mouth side, the inner diameter of the projecting portion is formed into two or more inner diameters, and the outer diameter of the insulating cylinder is formed into two or more outer diameters. Two or more kinds of outer diameters and inner diameters of the electrode ring are formed so as to match the inner diameter and the outer diameter of the insulating cylinder, and a plug having a mismatching diameter cannot be inserted into the outlet body.

[0006]

According to the present invention, erroneous insertion of the plug can be prevented because the plug for the low bolt cannot be inserted into the outlet for the line bolt and cannot be inserted in the opposite direction. Also, most of the parts for low bolts and line bolts can be made common, so cost can be reduced and the design can be unified. Therefore, erroneous insertion of the plug, which is likely to occur, can be reliably prevented by changing only the inner diameter of the protrusion on the outlet side, the outer diameter of the insulating cylinder, and the outer diameter of the plug. Furthermore, the plug of the terminal member on the instrument body side is composed of an electrode rod and an electrode ring provided on a concentric circle around the electrode rod, and the outlet body into which the plug is inserted is the inner electrode tube into which the electrode rod is inserted and this. When the outer electrode cylinder provided via an insulating cylinder on the surrounding concentric circles and the electrode ring are inserted, they make contact with the outer peripheral surface of the electrode ring at a plurality of positions in the vertical direction and on the inner peripheral surface of the outer electrode cylinder. With the elastic electrode piece provided, the plug side freely rotates and the plug can be easily attached to and detached from the outlet.

[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, an outlet housing made of an insulating material, for example, an insulating resin molded body, in which an outlet body 1 is arranged in the center of the lower surface and a cord 2 for connecting to a power supply side is arranged on the upper surface. Collar portions 4 and 5 extending outward in the radial direction are provided on both end sides of 3, respectively. The lower flange portion 4 is formed integrally with the outlet housing 3, and the lower end side of the outlet housing 3 is extended below the flange portion 4 to form an extension portion 6. A male screw portion 8 is formed on the outer periphery of the extending portion 6 as a fastening means 7 for attaching the plug side. Between the upper and lower flange portions 4 and 5 of the outlet housing 3, at least two screw rods 9 and 9 inserted from the lower flange portion 4 are rotatably held. The tip ends of these screw rods 9 and 9 penetrate the upper collar portion 5 and are rotatably supported by a washer 10 so that they do not fall downward and are rotatably supported. A notch groove that has a predetermined width in the circumferential direction and has a predetermined height in the upper and lower direction so as to cover the screw rods 9 and 9 and the outlet housing 3 and at a portion of the peripheral wall 12A corresponding to the side surface of the screw rods 9 and 9. A cover 12 provided with 11, 11 is provided. The proximal ends of the holding members 13, 13 are screwed into the intermediate portions of the screw rods 9, 9 and the free ends are rotated outward from the cutout grooves 11, 11 of the cover 12 in one direction. The holding members 13 and 13 that rotate together are extended by a length that can prevent the rotation of at least one end 11A or 11B (see FIG. 2) in the circumferential direction of the cutout grooves 11 and 11. Further, friction members 14, 14 made of rubber rings or the like are fitted under the screwing portions of the screw rods 9, 9 of the holding members 13, 13. This friction member 14
A rubber ring 15 similar to that is fitted to the side of the collar 4 below the screw rod 9 to prevent the screw rod 9 from rattling. After rotating the screw rods 9 and 9 so that the free end sides of the holding members 13 and 13 are brought into contact with either of the circumferential ends 11A and 11B of the cutout grooves 11 and 11, the screw rods 9 and 9 are further rotated. The holding members 13, 13 can be lowered. If the lowering of the clamping members 13, 13 is started after the lowering contacts the one end 11B, it may contact the other end 11A.
Alternatively, the length may be set to be equal to or greater than the length of 3, 13, the free ends of the holding members 13, 13 are brought into contact with the outlet housing 3, and the screw rods 9, 9 may be further rotated to raise them. According to this structure, it becomes easy to insert the ceiling plate 100 into the hole 101,
The diameter of the hole can also be reduced. The sandwiching members 13 and 13 and the lower collar portion 4 sandwich the ceiling plate 100 or the like so that an outlet can be embedded in a hole 101 formed in the ceiling plate 100 to be attached. Such a holding member 13
There may be three or more threaded rods 9 having.

An inner electrode cylinder 17 into which the electrode rod 16 on the plug side is inserted is provided in the center of the outlet housing 3, and an outer electrode cylinder 19 is provided outside the inner electrode cylinder 17 via an insulating cylinder 18.
Is provided along the inner peripheral surface of the outlet housing 3. Provided on the inner peripheral surface of the outer electrode cylinder 19 are a plurality of elastic electrode pieces 21 which come into contact with the outer periphery of the electrode ring 20 at a plurality of positions in the vertical direction when the electrode ring 20 provided around the electrode rod 16 is inserted. The outlet main body 1 having the electrodes arranged on the concentric axis is configured. The electrode rod 16 is supported by an insulating piece member 22, and an electrode ring 20 is provided outside the piece member 22. Further, the piece member 22 is attached to a pendant pipe 23 which serves as a terminal member. Furthermore, the pendant pipe 23
An insulating rotary cylinder 24 is provided on the upper end side of the outer circumference of the, and a tightening ring 25 is provided on the upper end side of the rotary cylinder 24. A female screw portion is formed on the inner peripheral surface of the tightening ring 25 and is screwed into the male screw portion 8. A decorative cover 26 is attached to the lower collar portion 4 so as to hide the tightening ring 25 in a state where the tightening ring 25 is fixed to the fixing means 7 formed on the outer periphery of the extending portion 6. The rotary cylinder 24 is rotatable with respect to the pendant pipe 23, and the flange at the upper end is supported from below by the flange at the lower end of the tightening ring 25. In the state where the tightening ring 25 is screwed into the male screw portion 8 of the extension portion 6,
The pendant pipe 23 is rotatable with respect to the rotary cylinder 24. Further, both the electrode rod 16 of the plug and the electrode ring 20 can be rotated while being inserted into the outlet main body 1, and as a result,
The terminal member of the instrument body, that is, the pendant pipe 23 in this example, can freely rotate around its axis.

FIG. 2 is a partial perspective view of the outlet side before the plug is inserted, in which the screw rods 9, 9 and the holding plates 13, 13 are exposed in the notch grooves 11, 11 formed on both sides of the cover 12. The projection 27 is formed on the lower surface of the holding plate 13 on the free end side. The screw rod 9 is rotated so that the free end side of the sandwiching member 13 is brought into contact with one end 11B in the circumferential direction of the notch groove 11, and then the screw rod 9 is further rotated in one direction, whereby the sandwiching member 13 is further moved. It descends because it does not turn. The rotation of the screw rod 9 is caused by the head 9 of the screw rod 9.
Insert a Phillips screwdriver into the Phillips groove formed in A and rotate it. When the sandwiching member 13 descends due to the rotation of the screw rod 9, the friction member 14 also descends while coming into contact with the sandwiching member 13. In FIG. 2, when the holding member 27 is raised, for example, when it is removed from the state where it is attached to the ceiling plate 100, and when it is pulled out from the hole 101, the screw rod 9 is rotated in the direction opposite to that described above. At this time, since the friction member 14 is in close contact with the holding member 13, the holding member 13 is swung from the one end 11B toward the other end 11A, and the free end of the holding member 13 is brought into contact with the outer peripheral surface of the outlet housing 3. . When the screw rod 9 is further rotated, the holding member 13 rises together with the friction member 14. The friction member 14 ensures that the holding member 13 pivots when the screw rod 9 starts rotating.
That is, when the threaded rod 9 rotates, the friction member 14 also rotates, and this rotation force causes the clamping member 13 to come into close contact with the friction member 14.
Therefore, the holding member 13 is prevented from idling and is reliably turned. If the sandwiching member 13 is thin, it may idle without following the rotation of the screw rod 9, but due to the presence of the friction member 14, it will swivel in response to the rotation of the screw rod 9.

In FIG. 3, a ring-shaped projecting portion 19A extending toward the center is formed on the insertion port side of the outer electrode cylinder 19 on the outlet side for 12V, and the inner diameter a of this projecting portion 19A is 9.2.
mm, and the outer diameter b of the insulating cylinder 18 is 6.0 mm. Electrode ring 20 on the plug side to be inserted into this outlet
As shown in FIG. 4, the outer diameter c is 9.0 mm, and the inner diameter d is
Was 6.5 mm.

FIG. 5 shows one for 100 V, in which the inner diameter e of the protruding portion 19A of the outer electrode cylinder 19 is 10.2 mm, and the insulating cylinder 1
8 has an outer diameter f of 7.0 mm, and FIG. 6 shows an outer diameter g of the electrode ring 20.
Was 10.0 mm and the inner diameter h was 7.5 mm.

Therefore, the plug shown in FIG. 6 cannot be inserted into the outlet shown in FIG. 3, and the plug shown in FIG.
It cannot be inserted into the outlet shown in. It should be noted that not only the outer electrode cylinder 19 but also the protrusion 1 on the extension 6 of the outlet housing 3
The protrusion 3A similar to that of 9A may be formed, and the inner diameter of this protrusion may be formed in two types, that is, for 12V and for 100V. Alternatively, only the inner diameter of the protrusion 3A may be changed without changing the inner diameter of the protrusion 19A.

FIG. 7 shows an example of mounting a lighting fixture using the outlet of the present invention, which is provided in an outlet casing 3 of an embedded outlet fixed in a hole 101 formed in a ceiling plate 100. Insert the plug of the pendant pipe 23 into the outlet body 1 and fix the plug side to the fastening means 7
Fastened to. The pendant pipe 23 is rotatable in a horizontal movement, and a joint end portion 30 employed in an L-shaped bent portion allows the tip end portion of the pipe to be swung vertically. A halogen lamp 31 with a mirror is provided at the tip of the pendant pipe 23, and the direction of irradiation of the halogen lamp 31 can be variably adjusted over almost the entire installation space. Further, the knob 32 can rotate the joint joint 30.

In the illustrated embodiment, the male screw portion 8 is formed as the fastening means 7, but other known fastening means can be adopted. Moreover, it is preferable to use a relatively flexible wire cord 2 such as a bag-punching cord as the wiring cord 2 which is connected to the commercial power source electric wire that is ceiling-wired or is connected by interposing a down transformer between the electric wires. In addition, the plurality of elastic electrode pieces 21 are provided along the axial direction of the outer electrode cylinder 19, and both ends thereof are supported by the outer electrode cylinder 19 and are rod-shaped or plate-shaped. A plurality of them are arranged at substantially equal intervals along the surface. Therefore, the electrode ring 20 inserted into the outer electrode cylinder 19 is sandwiched substantially uniformly by the plurality of elastic electrode pieces 21.
Therefore, even when the pendant pipe 23 on the plug side is L-shaped so that an eccentric load is generated, its holding is reliable and a plurality of elastic electrode pieces 2 electrically arranged on the circumference are provided.
1 makes it possible to widen the contact surface between the electrodes, disperse the lighting current, and suppress contact heat generation. That is, the electrode ring 20 is formed by the plurality of elastic electrode pieces 21.
The mechanical holding is ensured and the electrical connection is ensured.

In the embodiment shown in FIG. 1, the plug is inserted into the hole 101 before the plug is inserted into the socket, and the screw rod 9 is rotated in one direction on the head 9A side, the free end side of the holding member 13 is swung. Then, it hits one end 11B of the notch groove 11. When the screw rod 9 is further rotated in the same direction even after the holding member 13 hits the one end 11B of the cutout groove 11,
The holding member 13 descends. At this time, the friction member 14 also comes into close contact with the holding member 13 and descends together. The sandwiching member 14 collides with the ceiling plate 100, and the projection 27 is further attached to the ceiling plate 100.
If the screw rod 9 is rotated so as to bite into the gripping member 13,
The ceiling plate 100 is firmly sandwiched between the flange portion 4 and the collar portion 4, and the outlet is securely and easily attached around the hole 101 of the ceiling plate. After that, the plug side is inserted as shown in FIG. 1 and the plug side is fixed to the fixing means 7, so that the pendant pipe 23 is firmly attached to the outlet. The pendant pipe 23 and the rotary cylinder 24 are rotatable relative to each other, so that the plug side freely rotates in the state shown in FIG.

[0017]

As described above, according to the present invention, a ring-shaped protrusion extending toward the center is formed on the insertion port side of the outer electrode cylinder or / and the outlet housing, and the inner diameter of the protrusion is adjusted. In addition to forming two or more inner diameters, the outer diameter of the insulating cylinder is formed into two or more outer diameters, and the outer diameter and inner diameter of the electrode ring are two or more so as to match the inner diameter of the protruding portion and the outer diameter of the insulating cylinder. Since the plug that is formed and does not fit the diameter cannot be inserted into the outlet main body, for example, a 12V plug cannot be inserted into a 100V outlet,
Plug cannot be inserted into a 12V outlet.
Therefore, the incorrect insertion of the plug is reliably prevented. Further, since only the hole diameter and the outer diameter need to be different and the other parts can be made common, the design can be unified and the cost can be reduced. Further, an inner electrode tube into which the plug-side electrode rod is inserted is provided in the center of the outlet body provided in the outlet case, and an inner side of the inner electrode case is provided along the inner peripheral surface of the outlet case through an insulating tube. And a plurality of elastic electrode pieces that come into contact with the outer circumference of the electrode ring in a plurality of vertical positions when the electrode ring provided around the electrode rod is inserted into the inner peripheral surface of the outer electrode cylinder. With the configuration of (1) and (2), the mounting strength on the plug side inserted into the outlet is improved and the electrical connection is ensured. In particular, when the pendant pipe used as the terminal member is L-shaped, an eccentric load is generated. With such an outlet main body, the plug side to be inserted is securely held, and the elastic electrode piece is electrically connected. Will make a large number of contacts around the electrode ring, so the contact surface between the electrodes can be expanded and the lighting current can be dispersed.
It exhibits excellent effects such as suppressing contact heat generation.

[Brief description of drawings]

FIG. 1 is a sectional view of a plug inserted state showing a preferred embodiment of the present invention.

FIG. 2 is a perspective view showing a part of the outlet side.

FIG. 3 is a cross-sectional view of an outlet side configured for 12V.

FIG. 4 is a half sectional view of a plug side configured for 12V.

FIG. 5 is a sectional view of an outlet side configured for 100V.

FIG. 6 is a half cross-sectional view of a plug side configured for 100V.

FIG. 7 is a side view showing a state in which a lighting fixture is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outlet main body 2 Wiring cord 3 Outlet housing 4,5 Collar part 6 Extending part 7 Fastening means 8 Male screw part 9 Screw rod 11 Notch groove 12 Cover 13 Clamping member 16 Electrode rod 17 Inner electrode cylinder 18 Insulating cylinder 19 Outer electrode Tube 19A Projection 20 Electrode ring 21 Elastic electrode piece

Claims (1)

[Claims] 1. A plug of a terminal member on the instrument body side is composed of an electrode rod and an electrode ring provided on a concentric circle around the electrode rod, and an outlet body into which the plug is inserted is connected to the power supply side by inserting the electrode rod. And an outer electrode cylinder connected to a wiring cord for connecting to the power supply side, the inner electrode cylinder being connected with a wiring cord for An outlet casing made of a plurality of elastic electrode pieces provided on the inner peripheral surface of the electrode cylinder and vertically contacting the outer peripheral surface of the electrode ring at a plurality of positions, and made of an insulating material provided on the outer periphery of the outer electrode cylinder. Each of the upper and lower ends of the socket is provided with a flange portion that extends outward in the radial direction, and the lower end side of the outlet housing is extended to provide a fastening means for allowing the plug side to rotate on the mounting plug side. It is inserted from the collar part of Holds at least two screw rods rotatably, has a predetermined width in the circumferential direction at a portion of the peripheral wall corresponding to the side surface of the screw rod so as to cover the outlet housing and the screw rod, and has a predetermined vertical height. A cover with a notched groove is formed, and the base end side of the clamping member is screwed into the middle part of each screw rod, and the free end side is swung outward from the notch groove of the cover as the screw rod rotates. The clamping member is prevented from turning at least at one end in the circumferential direction of the cutout groove, and each screw rod is rotated in one direction to bring the free end side of the holding member into contact with one end in the circumferential direction of the cutout groove. After that, the screw rod is further rotated to lower the holding member to sandwich the ceiling plate or the like between the lower collar portion and the holding member, and the outer electrode cylinder or / and the outlet housing is inserted toward the insertion port toward the center. To form a ring-shaped protrusion that extends to The inner diameter of this protrusion is set to two or more types, the outer diameter of the insulating tube is set to two or more types, and the outer diameter of the electrode ring is adjusted to match the inner diameter of the protrusion and the outer diameter of the insulating tube. In addition, the combination structure of the embedded outlet and the plug is characterized in that two or more kinds of inner diameters are also formed, and the plugs that do not match the diameter cannot be inserted into the outlet body.