JP5432782B2 - Recessed downlight - Google Patents

Description

  The present invention relates to a lighting fixture, and more particularly to a recessed downlight used in a form embedded in a ceiling.

  Various types of small lighting fixtures (hereinafter referred to as “recessed downlights”) that are embedded in the ceiling are known. They usually have a cylindrical or bowl-like lamp case (reflector), and are attached to the ceiling so that only the lower end is exposed downward, and a lamp is attached inside the lamp case. It has been. A lamp that can be attached to a socket for an incandescent bulb (incandescent bulb, the same type of fluorescent lamp, or a bulb-type LED lamp) is usually used, and in many cases, the bulb side is downward and the base is upward. And screwed to a socket attached to the lamp case (see, for example, Patent Documents 1 to 5). Various types of sockets used for this type of embedded downlight are known (see, for example, Patent Documents 6 and 7). In this type, since the socket part into which the lamp base is screwed protrudes above the lamp case, the vertical width is increased, and the upper end of the recessed downlight is located substantially above the ceiling surface. .

  In the case of a recessed downlight with a large vertical width as described above, the structural element in the ceiling is located immediately in front of the wire connection hole of the socket of the downlight, so that the structural element such as the beam behind the ceiling is approached. Therefore, there are cases where it becomes difficult to connect the wires. In other words, it may be difficult to fully grasp the internal conditions of the installation location, such as the position of the beams behind the ceiling, before starting the downlight installation work. There is a tendency that a case where it is found during the operation that there is a portion in the front of the connection hole where a sufficient space for connecting the electric wire cannot be secured. In such a case, it is necessary to search for another one instead of the downlight that has been prepared.

  A recessed downlight of a type in which a lamp is attached to a lamp case from the side is also known (see, for example, Patent Documents 8 to 10). In such types of recessed downlights, parts with sockets and terminals (and more circuits, if applicable) protrude from the side of the lamp case and the wire connection holes provided in them. The cable behind the ceiling is connected. However, even with this type of down lie, if there is an obstacle such as a beam just before the wire connection hole, it may be blocked by that and the wire cannot be connected. In that case, another appropriate downlight that suits the specific situation must be searched, and there is still a problem that work efficiency is lowered.

Japanese Patent No. 3356915 Japanese Patent Laid-Open No. 1995-211122 JP 2006-012749 A JP 2009-104958 A JP 2010-016003 A JP-A-8-130076 JP-A-8-130077 JP 2001-256804 series JP 2005-276702 A JP 2005-276703 A

  The present invention is a recessed downlight socket of a type in which a lamp is attached to the lamp case from the outside (side or top), and there is an obstacle such as a beam on the back of the ceiling right next to the downlight installation position. Even in such a case, an object is to provide a socket that does not inconvenience the connection of electric wires, and an embedded downlight combined with such a socket.

  The inventor of the present invention relates to an embedded downlight of a type that is mounted in a form in which a lamp is inserted into the lamp case from the outside, and a portion of the socket that is disposed outside the side of the lamp case and connected to the electric wire (hereinafter referred to as “terminal box Can be attached to the lamp case by rotating it as desired, and the terminal box has a wire connection hole provided in the terminal box facing to the side of the axis of rotation. By configuring as above, the above problem was solved. That is, the present invention provides the following.

1. In a recessed downlight, a socket for mounting at least a light emitting part of a lamp in a form inserted partially from the outside to the inside, having a wire connection hole on the outside of the lamp case A terminal box to be attached; and a cylindrical portion which is a portion which is provided with a receiving metal and is inserted into the inside of the lamp case. A socket having an arc-shaped slot at least partially surrounding the base of the arc-shaped slot, and the wire connection hole being directed laterally with respect to the central axis of the arc-shaped slot .
2. A recessed downlight comprising the socket of 1 and a lamp case to which the socket is attached from the outside.

  According to the present invention, the attachment of the socket to the lamp case of the recessed downlight can be performed by screwing the hook to the lamp case through the screw provided in the slot provided in the hook. Therefore, the position of the screw hole on the lamp case side for fixing the socket can be appropriately set with a large degree of freedom along the length of the slot. Furthermore, when the socket is attached to the lamp case whose screw hole position is predetermined, the slot position can be appropriately changed along the length direction with respect to the fixed screw position. The orientation of the socket can be changed around the central axis of the upper slot. At this time, since the wire connection hole is directed laterally with respect to the central axis, the direction of the wire connection hole can be changed around the axis. Therefore, even when an unexpected obstacle such as a beam on the ceiling is touched, according to the present invention, the direction of the wire connection hole can be changed to avoid the obstacle and connect the wire. Does not interfere with installation.

FIG. 1 is a rear view of the socket of the embodiment. FIG. 2 is a front view of the socket of the embodiment. FIG. 3 is a side view of the socket of the embodiment. FIG. 4 is a side view of the socket of the embodiment on the wire connection hole side. FIG. 5 is a cross-sectional view taken along the center plane of the socket according to the embodiment. FIG. 6 is a cross-sectional view taken along a plane perpendicular to the center plane of the socket of the embodiment and passing through the central axis of the receiving metal. FIG. 7 shows a part of the recessed downlight of the first embodiment in which the socket of the embodiment is attached to the lamp case and the lamp is attached to the lamp case and installed in the ceiling. FIG. 8 is a side view of the recessed downlight according to the first embodiment shown in FIG. FIG. 9 is a side view of the recessed downlight according to the first embodiment shown in FIG. 8 as viewed from the socket side. FIG. 10 is a side view in which a part of the recessed downlight according to the second embodiment is made transparent.

  In the present invention, the “light emitting portion” of the lamp means a filament and a bulb containing the same in the case of an incandescent bulb, a fluorescent tube in the case of a fluorescent lamp, and an LED element itself in the case of an LED lamp.

  In the present invention, the slot is for passing a screw when the socket is screwed to the lamp case. Therefore, the width should just be what can pass the axial part of a screw. The socket is generally screwed in two places in the slot, but the total weight of the lamp and socket is not large, so that the lamp with the slot will have that total weight in one place. As long as it has sufficient strength to support, it can be screwed in only one place in the slot.

  In the present invention, the “center axis of the slot” refers to the rotation center axis of the arc formed by the slot, and generally coincides substantially with the center axis of the receiving metal in the socket.

  In the present invention, the length of the slot is not particularly limited, and is about 90 degrees or more, 150 degrees or more, 180 degrees or more, 210 degrees or more, etc., depending on the target pivotable range with respect to the central axis of the slot. What is necessary is just to set suitably so that it may respond | correspond to the center angle of the magnitude | size. As described above, the screwing of the socket to the lamp case may be performed only at one position of the slot. For example, when a slot having a length corresponding to a central angle of 90 degrees is provided, the socket can be rotated within a range of about 90 degrees if it is screwed in one place. As the pivotable range of the socket, about 30 degrees is usually sufficient for the purpose of the present invention. Therefore, even if the slot has a length corresponding to a central angle of 30 degrees or more, there is no problem. Further, in the present invention, for a slot, “at least partially surrounds the base of the cylindrical portion” means that the slot extends around the central portion of such a certain size around the base of the cylindrical portion. That means. Further, the slot may be a single slot that is uninterrupted as a whole, or may be divided at one or several places (for example, two or three places) as long as there is no hindrance to the rotation of the socket. You may be comprised from these divisions.

  In the present invention, the “cylindrical portion” is provided with a base in which a lamp base is screwed, and its outer diameter is usually substantially cylindrical like the outer diameter of the base. It is not limited to this.

  In the present invention, the “terminal box” supplies electric power to a lamp connected to a wire and attached to a receiver (directly or in the case of a fluorescent lamp or LED lamp, through a predetermined circuit). The device part for. As such a device portion, a wide variety of forms are well known to those skilled in the art, and in the present invention, they can be appropriately designed according to the lamp to be used.

  In the present invention, with respect to the direction of the wire connection hole, “side to the central axis of the slot” means that it is substantially transverse to the rotational axis passing through the center of the arc-shaped slot. At this time, the direction of the wire connection hole does not have to be in a plane perpendicular to the central axis of the slot, and may be within 45 °, preferably within 30 °, more preferably within 15 ° from such plane. That's fine.

  In the present invention, the “wire connection hole” is a portion for inserting and connecting the wires on the back of the ceiling. This comprises a connection hole for the electric power to be supplied from the outside, and preferably further as an additional connection hole for supplying power to other downlights, etc., which are constructed by branching the circuit therefrom. This includes a terminal further provided with a terminal (primary feed terminal).

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not intended to be limited to the examples.

  1 is a rear view of the socket 1 of the present invention, FIG. 2 is a front view, and FIG. 3 is a side view. In these drawings, 2 is a terminal box, and at its end 3, as shown in FIG. 4, two pairs of wire connection holes 5 opened toward the sides (one of which is the primary feed terminal side) Is provided. A cylindrical portion 8 (cylindrical in the present embodiment) extends below the terminal box 2, and a receiving metal 22 to which a lamp cap is screwed is provided. The terminal box 2 is provided with a flange 12 having a substantially circular outline so as to partially surround the base portion 10 of the cylindrical portion 8. An arc-shaped slot 16 is formed in the flange 12 so as to penetrate the front and back, and the slot extends as a whole over an area of about 210 degrees around the base of the cylindrical portion 8.

  FIG. 5 is a cross-sectional view taken along the center plane of the socket 1, and FIG. 6 is a cross-sectional view taken along a plane perpendicular to the center plane of the socket 1 and passing through the central axis of the receiver. In the figure, reference numeral 22 denotes a receiving metal, 23 denotes a contact with the center electrode of the lamp, and 24 denotes a bimetal provided to open the circuit at a predetermined high temperature, which is inserted in the middle to ensure overheating prevention.

  7 shows a state in which the socket 1 is attached to the lamp case 26 from the side, and the lamp 27 is attached to the lamp case 26, and the whole is supported by the ceiling plates 30 and 32 and installed in the ceiling. FIG. In this embodiment, the lamp 27 is a fluorescent lamp, and the light emitting portion is formed of a fluorescent tube 28. In the figure, the socket 1 is attached with the wire connection hole facing the back of the drawing.

  8 is a side view of the state shown in FIG. 7, and FIG. 9 is a side view of the same state as viewed from the socket 1 side. The socket 1 can be screwed using a slot. For example, the lamp case 26 is provided with screw holes at the upper and lower positions on the circumference of the same radius as the slot of the socket 1 like the screw 35 shown in FIG. When mounting, the socket 1 can be rotated and screwed from the position shown in FIG. 9 within the range shown by the wavy line with respect to the center C of the slot. Therefore, in the example shown in FIG. 9, the socket 1 can be rotated clockwise or counterclockwise with respect to the indicated mounting direction and can be mounted at different angles up to about 30 degrees as a whole. Is possible. This is also true when the socket 1 is rotated 180 degrees with respect to those positions, as is apparent from FIG. Therefore, this embodiment provides a great degree of freedom in the mounting direction of the socket 1.

  Further, a screw can be passed through the slot of the socket 1 at any position. For this reason, on the lamp case 26 side, screw holes are provided at appropriate positions along the slot (for example, positions 120 degrees apart from each other), so that the socket 1 can be mounted at a larger angle when the socket 1 is attached. It can also be made pivotable.

  FIG. 10 is a side view in which a part of the recessed downlight according to the second embodiment in which the socket 1 is attached to the lamp case 26 'from above is made transparent. In the figure, the lamp case 26 'has a structure in which the socket 1 is attached to the upper portion, unlike the lamp case 26 in the above-described embodiment, but the socket 1 has the same structure as the above-described socket.

  According to the present invention, the position of the screw hole on the lamp case side for fixing the socket can be appropriately set at a position along the length of the slot with a large degree of freedom. Conversely, the orientation of the socket can be changed with respect to the position of the screw hole. For this reason, the direction of the wire connection hole provided in the terminal box of the socket can be changed by turning it appropriately around the central axis of the slot, and this should be avoided even when it comes into contact with unexpected obstacles such as beams on the ceiling. Therefore, it is possible to connect the wires, and there is no problem in installing the downlight. Therefore, the present invention is useful as an embedded downlight socket that is highly versatile and easy to mount, and as an embedded downlight that can be easily mounted in combination with a lamp case.

1 = Socket 2 = Terminal box 3 = End portion 5 = Wire connection hole 8 = Cylindrical portion 12 = Bridge 16 = Slot 22 = Sink 23 = Contact 24 = Bimetal 26, 26 ′ = Lamp case 27, 27 ′ = Lamp 28 = Fluorescent tube 30, 32 = Ceiling plate 35 = Screw

Claims (2)

  In a recessed downlight, a socket for mounting at least a light emitting part of a lamp in a form inserted partially from the outside to the inside, having a wire connection hole on the outside of the lamp case A terminal box to be attached; and a cylindrical portion which is a portion which is provided with a receiving metal inside and is inserted into the inside of the lamp case, wherein the cylindrical portion is disposed on the cylindrical portion side of the terminal box. A socket having an arc-shaped slot at least partially surrounding the base of the arc-shaped slot, and the wire connection hole being directed laterally with respect to the central axis of the arc-shaped slot .   An embedded downlight comprising the socket according to claim 1 and a lamp case to which the socket is attached from the outside.

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