JPH10188654A - Recessed luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly lift or lower a luminaire with constant sliding resistance by providing guide rails arranged in the inner face of a main body case and formed with guide grooves in the vertical direction, sliders having head sections with the prescribed shapes adaptable to the guide grooves, and coil springs energizing the sliders to press the head sections to the guide rails. SOLUTION: A pair of guide rails 4 are fitted by screws 5 at the positions displaced 180 deg.C on the inner peripheral face of a main body case 1 to face each other in the vertical direction along the inner peripheral face of the main body case 1. Sliders 10 excited by coil springs 11 are pressed to the guide rails 4 provided on the inner face of the main body case 1 and formed with guide grooves in the vertical direction. The guide grooves of the guide rails 4 serve to guide the head sections 10a of the sliders 10 when a luminaire 6 is lifted or lowered, the backlash of the head sections 10a is prevented, and the luminaire 6 can be smoothly lifted or lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recessed lighting fixture which can be used as a so-called downlight, and can also be used as a spotlight, by being mounted in a recessed hole formed in a ceiling and raising and lowering a lamp part. .

[0002]

2. Description of the Related Art FIG. 5 is a cross-sectional view showing a state in which a conventional recessed lighting apparatus described in, for example, Japanese Utility Model Publication No. 1-7937 is mounted. In the figure, a main body case 51 of an embedded lighting fixture is fixed to a ceiling 53 by a mounting spring 52. A pair of rails 54 long in the vertical (vertical) direction are provided on the inner peripheral side of the main body case 51. V-shaped leaf springs 57 are provided at both ends of a mounting plate 56 for supporting the lamp 55.
Is attached. The leaf spring 57 elastically contacts the rail 54 and can slide up and down, so that the lamp 55 that has been moved up and down can be supported at any position. In addition, the lamp 55
Are connected to a terminal block 59 by a covered wire 58 having a sufficient length.

[0003]

However, in the above-mentioned prior art, since the leaf spring 57 varies in the angle of the V-shape due to springback during press forming in the manufacturing process, the elasticity is not constant. Did not. For example, when the elastic force is larger than a preferable value, the sliding resistance between the rail 54 and the leaf spring 57 becomes large, and a large force is required to raise and lower the lamp 55, so that the operation is difficult. there were. Further, since the V-shaped leaf spring 57 is used, the mounting plate 56 is easily inclined when the lamp 57 is moved up and down, and the mounting plate 5
If the leaf spring 57 is twisted due to the inclination of 6, the problem that it is difficult to raise and lower the lamp 57 smoothly.

[0004] In view of the above-mentioned conventional problems, an object of the present invention is to provide a recessed lighting device capable of smoothly moving a lamp up and down with a certain sliding resistance.

[0005]

According to the present invention, there is provided a recessed type lighting apparatus comprising: a main body case buried in a ceiling; and a guide rail provided on an inner surface of the main body case and forming a guide groove in a vertical direction. A mounting member that is disposed inside the main body case and supports the lamp, and is held by the mounting member so as to be able to advance and retreat in the horizontal direction in opposition to the guide rail, and the guide groove is provided at a front end opposite to the guide rail. And a coil spring for urging the slider to press the head against the guide rail. In such a configuration, since the coil spring has inherently constant dimensional accuracy, there is little variation in the elastic force of each product.Therefore, there is no individual difference between products in a large number of mass-produced embedded lighting devices. The slider can be brought into contact with the guide rail with a constant pressing force. In addition, the guide rail acts to guide the head portion of the slider to slide up and down during the elevating operation of the lamp, so that rattling of the head portion is prevented, and the lamp can be raised and lowered smoothly.

In the above configuration, the distance between the uppermost end and the lowermost end is longer than the distance between the leftmost end and the rightmost end of the entire area of the contact surface of the head with the guide rail. You can also According to such a configuration, since the contact surface is vertically long or substantially equivalent to vertically long, it is possible to prevent the mounting member from tilting when the lamp is moved up and down. Therefore, the slider does not twist during the elevating operation.

[0007] The guide rail may be a channel-shaped member having a rail portion formed of a flat groove bottom plate and a guide portion formed of a side plate protruding from both ends of the groove bottom plate. In such a configuration, by the operation of raising and lowering the lamp, the guide portion acts to guide the slider up and down while restricting the circumferential movement of the head portion of the slider, and the head portion slides up and down on the rail portion. . Therefore, rattling of the head portion is prevented, and the lamp can be raised and lowered more smoothly.

Further, a pair of guide rails may be provided on the inner surface of the main body case so as to face each other, and a pair of sliders may be provided corresponding to each guide rail. According to such a configuration, since a constant urging force of the coil spring is uniformly applied to the guide rail from the slider to the left and right, it is possible to prevent the lamp from being tilted at the time of the elevating operation and to smoothly perform the elevating.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 3 are drawings showing a recessed luminaire according to an embodiment of the present invention.
2 is a cross-sectional view in a state where the lamp is raised to the uppermost position (a state where the lamp is used as a downlight), FIG. 2 is a cross-sectional view in a state where the lamp is lowered to some extent (a state where the lamp is used as a spotlight), and FIG. FIG. 3 is a partial cross-sectional plan view taken along line III. In FIG. 1, a cylindrical main body case 1 of an embedded lighting fixture is fixed to a ceiling 3 by a flange 2 and a fall prevention device (not shown). The pair of guide rails 4 extend vertically along the inner peripheral surface of the main body case 1 and are positioned on the inner peripheral surface of the main body case 1 so as to face each other.
It is attached with a screw 5 at a position shifted by 80 degrees.

On the other hand, a lamp 6 having a bulb (not shown) mounted therein is mounted on a disk-shaped mounting plate 7, and a covered wire 12 is drawn upward. A mounting frame 8 is fixed to an upper part of the mounting plate 7, and a pair of sliders 10 is supported on the mounting frame 8 by using a support member 9 to form a coil spring 11.
And is supported in a state of being urged radially (horizontally) outward. The mounting plate 7, the mounting frame 8 and the support member 9 constitute a mounting member for holding the lamp 6 and for holding the slider 10. A pair of sliders 1
Numerals 0 are arranged to face the guide rails 4 respectively, and when the head portion 10a of the slider 10 abuts on the guide rails 4 with a constant pressure, the head 10a projects radially outward from the inside of the main body case 1, and The lamp 6 is held by the frictional resistance between the portion 10a and the guide rail 4. When the lamp 6 is pulled downward from the state shown in FIG. 1, the head 10 a of the slider 10 slides on the guide rail 4,
As shown in FIG. 2, the lamp 6 descends.

Next, the structures of the guide rail 4 and the slider 10 will be described in more detail. Guide rail 4
Is a channel-shaped member having a U-shaped horizontal cross section as shown in FIG.
rail part 4 consisting of a flat groove bottom plate for sliding contact with a
a and a guide portion 4b formed of a side plate protruding from both side ends of the rail portion 4a toward the slider 10. The guide portion 4b functions to regulate the circumferential movement of the head portion 10a and guide the head portion 10a in the vertical direction.

The slider 10 is a molded product of plastic or metal, and FIG. 4 shows an example of its detailed shape. FIG.
(A) is a plan view, (b) is a front view (view from the radial outside of the main body case 1), (c) is a side view,
(D) is a rear view (a view as seen from the radial inside of the main body case 1). As shown in these figures, the slider 10 is provided with the head portion 10a at one end of a main shaft portion 10b,
This is a shape in which a locking portion 10c is provided in the middle of the main shaft portion 10b. The head portion 10a has a substantially rectangular plate shape in which the outer sides of the upper and lower sides are chamfered, and the length B in the vertical direction is larger than the length A in the horizontal direction (numerical example: 20 mm).
(Numerical example 30 mm) is longer. This is to prevent the head 10a from tilting when the lamp 6 is moved up and down. Also, the chamfering was performed when the head 1
This is for preventing the upper and lower ends of Oa from being caught on the guide rails 4 and sliding smoothly.

The main shaft 10b has a prismatic outer shaft portion 10b1 between the head portion 10a and the locking portion 10c.
Inside of the locking part 10c (right side in side view (c))
Inner shaft 10 to which a coil spring 11 (FIG. 3) is attached
b2 has a columnar shape. The reason why the outer shaft portion 10b1 is formed into a prismatic shape is to provide a detent effect. Further, the lower flange 10c2 of the locking portion 10c is larger than the upper flange 10c1 of the main shaft 1c.
The protrusion length from 0b is large. This is achieved by bringing the lower flange 10c2 into contact with the mounting plate 7 as shown in FIG.
This is to prevent the head portion 10a from rattling during the lifting operation.

In FIG. 3 and FIG. 1, the slider 10 is
In a state where the coil spring 11 is mounted, an inner end in the radial direction penetrates the mounting member 8, and the locking member 10 c and the coil spring 11 are mounted on the mounting frame by the support member 9 fixed to the mounting member 8. 8 and the supporting member 9. As a result, the slider 10 is held in a state where the slider 10 can advance and retreat in the axial direction within a predetermined range. In addition, the head portion 10a comes into contact with the rail portion 4a of the guide rail 4,
The coil spring 11 is in a compressed state. Such a structure is provided in a pair on the left and right on the diameter of the main body case 1, so that the head portion 10 a is uniformly pressed by the left and right.
Is pressed against the guide rail 4. In addition, since the coil spring 11 can easily obtain a certain dimensional accuracy due to its characteristics, the dimensional variation among products is very small, and the elastic force of each product is constant. Thus, the slider 10 can be slid smoothly in a state where the slider 10 is pressed against the guide rail 4 with a constant pressure equal to the left and right.

In the above-described embodiment, the shape of the head portion 10a is substantially a rectangular plate as described above. However, the present invention is not limited to this. is there. For example, when viewed from the contact surface side, only the upper end portion and the lower end portion are contact surfaces, and there is a concave portion between them, or a shape in which a plurality of projecting contact portions are erected on a flat substrate. Is the case. In short, the same applies to the entire area of the contact surface of the head portion with the guide rail, provided that the distance between the uppermost end and the lowermost end is longer than the distance between the leftmost end and the rightmost end. An effect can be obtained.

In the above-described embodiment, the pair of sliders 10 and the guide rails 4 are provided so as to face each other on the inner surface of the main body case 1, that is, at positions that are 180 degrees shifted from each other on a horizontal plane. But,
Three or more of these can be provided according to the weight of the lamp. For example, when three sliders and three guide rails are provided, by arranging them at angular positions shifted from each other by 120 degrees, the same operation and effect as in the present embodiment can be obtained. In addition, in the case of four pieces, the same operation and effect can be obtained by arranging them so as to face each other in a pair in a plan view, in addition to the arrangement at every 90 degrees. In short, two or more radially outward sliders 10
Pressing force (or the stress of the guide rail 4 inward in the radial direction)
The arrangement may be such that the vector sum of is zero for the entire instrument.

[0017]

The present invention configured as described above has the following effects. The embedded lighting device of the present invention is configured such that the slider urged by the coil spring is pressed against the guide rail provided on the inner surface of the main body case and forming a guide groove in the vertical direction. , A constant elastic force without variation can be given by a coil spring with excellent dimensional accuracy, and the guide groove of the guide rail is
Since the slider guides the head of the slider during the elevating operation of the lamp, it is possible to prevent the head from rattling and to smoothly raise and lower the lamp. Therefore, the lamp can be raised and lowered smoothly with a certain sliding resistance.

Further, in the entire area of the contact surface of the head portion with the guide rail, the distance between the uppermost end and the lowermost end is longer than the distance between the leftmost end and the rightmost end. In this case, since the head portion is vertically long or substantially the same as vertically long, it is possible to prevent the mounting member from being tilted when the lamp is moved up and down. Therefore, it is possible to prevent the slider from being twisted during the elevating operation, and to smoothly elevate the lamp.

In the case where the guide rail is constituted by a channel-shaped member having a rail portion formed of a flat grooved bottom plate and a guide portion formed of a side plate protruding from both ends of the grooved bottom plate, the guide rail is formed of a lamp. By the lifting operation, the guide part acts to guide the slider up and down while restricting the circumferential movement of the head part of the slider, and the head part slides up and down on the rail part, preventing rattling of the head part Thus, the lamp can be raised and lowered more smoothly.

When a pair of guide rails are provided on the inner surface of the main body case so as to face each other and a pair of sliders are provided corresponding to the respective guide rails, a constant biasing force by a coil spring is equally distributed from the slider to the left and right. Since the lamp is provided on the rail, it is possible to prevent the lamp from tilting during the elevating operation and to perform a smooth elevating operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a recessed lighting device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the lamp is lowered in the embedded lighting fixture.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIGS. 4A and 4B are views showing a slider in the recessed lighting device according to one embodiment of the present invention, wherein FIG. 4A is a plan view and FIG.
Is a front view (view of the body case 1 from the outside in the radial direction), (c) is a side view, and (d) is a rear view (the body case 1).
FIG. 3 is a diagram of the outer side of the inner side of FIG.

FIG. 5 is a cross-sectional view of a conventional recessed lighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Flange part 3 Ceiling 4 Guide rail 4a Rail part 4b Guide part 5 Screw 6 Lamp 7 Mounting plate 8 Mounting frame 9 Support member 10 Slider 10a Head part 10b Main shaft part 10c Lock part 11 Coil spring

Claims (4)

[Claims] 1. A main body case buried in a ceiling, a guide rail provided on an inner surface of the main body case to form a vertical guide groove, and arranged inside the main body case to support a lamp. An attachment member, a slider which is held by the attachment member so as to be able to advance and retreat in the horizontal direction in opposition to the guide rail, and which has a head portion of a predetermined shape adapted to the guide groove at an end on the opposite side to the guide rail; A coil spring for urging the slider to press the head portion against the guide rail. 2. A distance between an uppermost end and a lowermost end of an entire area of a contact surface of the head with the guide rail is longer than a distance between a leftmost end and a rightmost end. The embedded lighting fixture according to claim 1, wherein: 3. The guide rail according to claim 1, wherein the guide rail is a channel-shaped member having a rail portion formed of a flat groove bottom plate, and a guide portion formed of a side plate protruding from both ends of the rail portion toward the slider. The recessed lighting device according to claim 1, wherein: 4. The embedding device according to claim 1, wherein a pair of said guide rails are provided on the inner surface of said main body case so as to face each other, and a pair of said sliders are provided corresponding to each guide rail. Built-in lighting equipment.