JP2001014906A - Luminaire and desk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-desk luminaire allowing suppression of front glare and temperature increase in a light body, and allowing improvement in appearance, an illuminance on an irradiated surface, protection performance of a fluorescent lamp and strength of a lamp cover. SOLUTION: In this luminaire, a light body 15 supported in an upper end part of a post via an arm has a shade 71, lamp sockets 73, a straight tube fluorescent lamp 74 and a diffusive translucent lamp cover 75. The shade 71 which opens downwardly is connected to a tip part of the arm. The sockets 73 are respectively disposed in longitudinal both end parts of the shade 71, while the lamp 74 is detachably supported between the sockets 73. The lamp cover 75 has a cover main part 111 covering the front side and lower side of the lamp 74, socket cover parts 112 integrally formed at longitudinal both ends of the main part 111, each covering the front side and rear side of the socket 73, and a rear side open part 113 zoned with the cover main parts 111 and both the socket cover parts 112.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture suitable for desk lighting, for example, and a desk such as a learning desk provided with the lighting fixture.

[0002]

2. Description of the Related Art For example, a stand-type lighting device for lighting a learning desk is provided. In this device, an arm protruding forward is attached to the upper end of a column, and a lamp having a straight tube-type fluorescent lamp is connected to the tip of the arm. The lamp body is formed to have a shade, a lamp socket, a fluorescent lamp, and a diffuse translucent lamp cover, and the lamp cover is provided so as to entirely cover a lower surface opening of the shade, and a fluorescent lamp is provided. Some are provided on the shade so as to cover only the front side.

In a lighting fixture provided with a lamp cover that covers the entire lower surface opening of the shade, the fluorescent lamp and the lamp socket in the shade are not visible, so that the appearance of the lamp body can be improved. Although excellent in the protection performance of fluorescent lamps, the temperature of the lamp body tends to rise due to the heat generated by the fluorescent lamps, the amount of materials constituting the lamp cover is large, and the cost is high. Is low.

[0004] Further, a lighting fixture provided with a lamp cover that covers only the front end of the fluorescent lamp and suppresses glare in front,
It is excellent in that the amount of materials that make up this cover is small and low cost, and that the temperature rise of the lamp body is small and the illuminance on the irradiated surface is high, but since it covers only the front side of the fluorescent lamp, the lamp protection performance There is a problem of low. In addition, when looking up at the end of the lamp body, the lamp socket is visible together with the entire fluorescent lamp, which is not preferable in appearance, and the width of the lamp cover is narrow as in each part, and its mechanical strength is weak. Since the device is easily deformed, improvement of the device is required in order to enhance the commerciality of the device.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to suppress the glare in front and the temperature rise of the lamp body, the illuminance of the appearance and the illuminated surface, the protective performance of the fluorescent lamp, and the performance of the lamp cover. It is an object of the present invention to provide a lighting fixture and a desk, each of which can improve strength.

[0006]

According to a first aspect of the present invention, there is provided a lighting apparatus, comprising: a support, an arm connected to an upper end of the support, and a distal end of the arm. A shade connected to the lower surface of the shade, lamp sockets respectively arranged at both ends in the longitudinal direction of the shade,
A straight tube fluorescent lamp removably supported over these lamp sockets, a cover main part covering the front side and the lower side of the lamp, and integrally provided at both longitudinal ends of the main part to cover the front side and the back side of the lamp socket. A lamp body having a diffusely translucent lamp cover attached to the shade including a socket cover portion and a rear open portion defined by the cover main portion and both socket cover portions. It is characterized by the following.

In the present invention and each of the following inventions, the arm may be immovably or movably attached to the upper end of the column. Therefore, when the arm is immovable, the arm is attached to the column. Can be made together with
The arm may or may not be able to expand and contract in the front-rear direction, and the lamp body is desirably supported so as to be rotatable at least in the vertical direction with respect to the arm. Further, in the present invention and each of the following inventions, the shade and the lamp cover can be formed of a synthetic resin or the like, and it is desirable that the shade is non-translucent. It is desirable to do so. In addition, the lighting fixtures of the present invention and the following inventions can be used as various types of stand lighting other than desk lighting.

In the present invention, the front part of the fluorescent lamp is covered by the cover main part of the lamp cover of the lamp body, so that glare forward can be suppressed by the light diffusing action of the cover main part, and as described above. Since the cover main portion covers not only the front side but also the lower side of the fluorescent lamp, the protection performance of the fluorescent lamp can be improved. Since the front and rear sides of the lamp socket are covered by the socket cover portions at both ends in the longitudinal direction of the lamp cover, the fluorescent lamp and the lamp, together with the cover main part that covers the front and lower sides of the fluorescent lamp as described above. The socket becomes difficult to visually recognize, and the appearance of the lamp body and the appliance can be improved. Further, by having the socket covers at both ends as described above, the strength of the entire lamp cover can be improved, and thus the reinforcing effect and the fluorescent lamp protecting effect can be enhanced. In addition, since the lamp cover has a rear opening portion partitioned by a socket cover portion at both ends and a cover main portion, the lamp cover does not block the entire open lower surface of the shade, and the lamp cover does not have a rear opening portion. Since the introduced air can be circulated through the lamp body and the temperature rise of the fluorescent lamp and the lamp body can be suppressed, and the light of the fluorescent lamp can be directly radiated downward without attenuating the light of the fluorescent lamp through the rear opening,
The illuminance of a surface to be irradiated such as a desk can be improved.

[0009] A lighting apparatus according to a second aspect of the present invention is characterized in that the rear opening is opposed to the rear of the fluorescent lamp.

In the present invention, a part of the light emitted from the fluorescent lamp can be directly projected directly downward without attenuation through the opening on the rear side of the main portion of the cover main portion. Thereby, the illuminance on the surface to be irradiated such as a desk can be further improved.

According to a third aspect of the present invention, in the lighting apparatus, the lamp body is attached to the arm so as to be rotatable in the vertical direction, and the width of the cover main portion is rotated to a maximum elevation angle. The fluorescent lamp is set so as not to be visually recognized when the fluorescent lamp is turned on.

According to the present invention, by setting the width of the cover main portion, even when the lamp is looked up or the lamp is turned upward, the cover main portion covers and illuminates the fluorescent lamp to visually recognize the lamp. Therefore, the appearance of the instrument can be improved, and direct light can be prevented from entering the eyes.

According to a fourth aspect of the present invention, there is provided the lighting device, wherein ribs arranged in the width direction of the cover main portion and extending in the longitudinal direction of the cover main portion are integrally provided on the back surface of the cover main portion. Features. Further, the lighting fixture of the invention according to claim 5 is characterized in that the cover main part has an inclined shape that gradually decreases as going from the front side to the rear side, and the ribs protrude vertically. I do.

In these inventions, the light radiated forward from the fluorescent lamp is attenuated by the ribs, respectively, so that glare to the front can be more effectively suppressed, and the strength of the lamp cover is improved by the ribs. it can.

According to a sixth aspect of the present invention, in the lighting apparatus according to the present invention, each of the ribs is provided such that the upper end of the rib at the rear position overlaps the root of the rib at the front position when the main portion of the cover is viewed from the horizontal direction. It is characterized by having.

In the present invention, the light emitted forward from the fluorescent lamp first passes through the ribs, and then passes through the main part of the cover. Therefore, the light is attenuated in two stages of the rib and the cover main portion, so that glare forward can be suppressed more effectively.

According to a seventh aspect of the present invention, in the lighting apparatus, the end of each of the ribs is located on the back side of the lamp socket.

According to the present invention, the back side of the lamp socket can be illuminated by irregular reflection at both ends in the longitudinal direction of each rib, so that the shadow of the lamp socket is hardly reflected on the socket cover, and the brightness of the entire lamp cover is increased. The difference in height can be reduced, and the appearance of the device can be improved.

The lighting apparatus according to the invention of claim 8 is characterized in that a photocatalytic layer is applied to the outer peripheral surface of the tube wall of the fluorescent lamp. As the photocatalyst layer, a layer mainly containing titania particles, which is easily available in terms of cost, can be typically used.

According to the present invention, the outside air flows in from the rear opening of the lamp cover located below the rear side of the fluorescent lamp, and passes through the periphery of the fluorescent lamp from the front side or the upper side of the lamp body. Can be drained outside. In this case, the smell and dirt in the air flowing around the fluorescent lamp can be decomposed and purified by the decomposing function of the photocatalytic layer.

According to a ninth aspect of the present invention, there is provided a desk having a top plate, a book stand mounted on the top plate, and fixing the support to the book stand to mount the top surface on the top plate. The lighting device according to any one of claims 1 to 8 for lighting.

According to the present invention, there is provided a lighting fixture which can suppress glare in the front and a rise in the temperature of the lamp body, and improve the appearance and illuminance of the illuminated surface, the protection performance of the fluorescent lamp, and the strength of the lamp cover, respectively. In addition, it is possible to provide a desk with a high-quality lighting device that can improve the illuminance on the desk while reducing glare, or can clean the air near the user who uses the desk.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

A learning desk 1 shown in FIG. 1 includes a desk body 2 having a top plate 2a, a book stand 3 installed on the upper surface of the rear end of the top plate 2a, and a stand type mounted on the book stand 3. And a desk lighting device 4.

As shown in FIG. 2 to FIG.
Includes a clamp 11, an outlet box 12, a support 13, an arm 14, a lamp 15, a inverter lighting device 16, and the like. When the lighting apparatus 4 is mounted on a learning desk without the book stand 3, a clamp 11 and an outlet box 12 are disposed at the lower end of the column 3 as shown in FIGS. The clamp 11 is attached to the desk body 2 in an assembled state.
Can be mounted by pinching it on the edge of the top plate 2a.

As shown in FIGS. 2 to 4, the metal clamp 11 has an L-shaped clamp body 23 composed of a horizontal piece 22 bent at a right angle from a lower end of a vertical piece 21.
A clamp shaft 24 through which the horizontal piece 22 is screwed up and down, a clamp plate 25 fixed to the upper end of the shaft 24 and facing the horizontal piece 22, and a lower end of the clamp shaft 24 in a direction perpendicular to the axis. And a handle 26 mounted therethrough. The clamp 11 is removably attached to the desk body 2 by clamping the edges of the top plate 2a between the clamp plate 25 and the horizontal piece 22 disposed on the upper and lower sides thereof by rotating the handle 26. . In the present invention, the clamp 11 may be omitted.

The outlet box 12 has a plurality of outlets 31 to 33 and a push-type switch 34. A power cord 35 (see FIG. 1) having a plug that is plugged into a wall-side outlet (not shown) is attached to the outlet box 12. The outlet 31 is used to supply power to the lamp body 15, and the other two outlets 32 and 33 are used to supply power to various electric appliances installed on a desk or the like.

The outlet box 12 has a metal back plate 36 (see FIG. 4) for closing the rear opening. The screw holes provided in the back plate 36 have vertical pieces 2 of the clamp body 23.
A screw 37 that passes through holes provided at the lower end of the support 1 and the support 13 is screwed in. By tightening the screw 37,
As shown in FIGS. 3 and 4, the clamp 11 and the outlet box 12 are attached with the lower end of the column 13 interposed therebetween in the front-rear direction. In addition, when the lighting apparatus 4 is mounted on the book stand 3, the clamp 11 and the support 13 are respectively positioned on the back side of the back plate 3 a of the book stand 3 and the back plate 3 a
In a state where the outlet box 12 is located on the front side of the outlet box 12, screws 37 penetrating holes provided in the vertical piece 21, the lower end of the support 13, and the back plate 3 a are screwed into the back plate 36 of the outlet box 12. This is done by tightening.

As shown in FIG. 4 and FIG.
3 is formed by screwing synthetic resin column covers 46 and 47 from both front and rear sides to a metal core 45 whose upper end is bent into an L shape. The height of the support 13 is higher than the height of the back plate 3 a of the book stand 3.

The arm 14 is attached to the upper end of the column 13. The arm 14 is a support-side arm base 5.
1, a lamp body side slide arm 52, an arm cover 53
And is formed so as to be able to expand and contract in the front-rear direction.

That is, the arm base 51 has a metal fixed rail 55 having a U-shaped cross section, and a synthetic resin base cover 56 which is screwed by opening the upper surface and disposing the fixed rail 55 in this opening. And As shown in FIGS. 4 and 5, the base cover 56 has an upward boss 5 into which a screw for fixing the fixing rail 55 is screwed.
6a and 56b are projected, and
c is formed. A rear end portion of the base cover 56 covering the fixed rail 55 from below is a bolt 5 that penetrates both of them and is vertically screwed into the bent upper end portion of the core 45.
7 and nuts 57a screwed to the support 13
It is connected to.

The space between the upper surface of the bent upper end of the core 45 and the rear end of the base cover 56 and the space between the rear end of the fixed rail 55 and the rear end of the base cover 56 are made of polyacetal resin. The sliding plates 58 and 59 are sandwiched.
Then, the arm base 51 is attached to the column 13 so as to be rotatable in the horizontal direction while applying a predetermined frictional force to the contact portion with each of the sliding plates 58 and 59 by tightening the bolt 57 with a predetermined torque. I have. Therefore, the arm 14
Can be turned around the bolt 57 as a pivot as shown by an arrow A in FIG. The arm 14 is temporarily held by a click structure (not shown) at a reference position where the arm 14 is straight forward as shown in FIG. 3 and is also temporarily held at a position turned about 30 ° on both sides thereof. Has become.

The slide arm 52 has an arm housing 61 made of a flame-retardant synthetic resin having an open lower surface, and a metal movable rail 62 screwed to the housing 61 and arranged so as to substantially close the opening on the lower surface. And The movable rail 62 having a U-shaped cross section is fixed rail 55.
And is slidably provided along the longitudinal direction of the rail 55. Therefore, the arm base 5
By pushing and pulling the slide arm 52 with respect to 1
The arm 14 is moved about 1 in the front-rear direction as indicated by the arrow B in FIG.
It can expand and contract by 10 mm. In order to smoothly slide the two rails 55 and 62, a slider (not shown) supporting a plurality of rotatable steel balls is interposed between them. At two positions in the longitudinal direction of the arm 14, moderation imparting portions (not shown) are provided, respectively, so that pulling out and pushing of the slide arm 52 with respect to the arm base 51 are regulated by the moderation. .

The arm cover 53 is made of synthetic resin.
It is made a little bigger. The arm cover 53
The edge of the lower surface opening is joined to the edge of the upper surface opening of the base cover 56 and connected to the cover 56 via a screw (not shown). The slide arm 52 is moved in the front-rear direction through the opening at the front end of the arm cover 53, and the front end of the slide arm 52 is
3 protrudes from the front end opening.

Next, the structure of the lamp body 15 supported on the front end (tip) of the arm 14 will be described with reference to FIGS. The lamp body 15 includes a shade 71, a reflector 72, a pair of lamp sockets 73, a straight tube fluorescent lamp 74, a lamp cover 75, a switch 77, and the like.

The shade 71 is made of a non-translucent synthetic resin.
It has a substantially semi-cylindrical shape with an open lower surface. A handle portion 76 protruding forward is integrally formed at a central portion in the longitudinal direction of the shade 71, and a switch 77 is provided near the position where the thumb reaches when the handle portion 76 is gripped.
Is installed. The handle portion 76 is used as a handle for moving the lamp body 15 to an arbitrary posture. The switch 77 is a push type, and the on / off operation of the switch 77 turns on / off the fluorescent lamp 74.

As shown in FIG. 8, on the inner surface of the shade 71, a plurality of reflector supporting ribs 101 extending in the front-rear direction are integrally provided at several places in the longitudinal direction. Sade 71
Cover support ribs 102 connected to the back surface of the front wall and reflector support ribs 1 connected to the back surface of the rear wall at several locations in the longitudinal direction.
03 are protruded integrally from each other. In addition, shade 71
At both ends in the longitudinal direction, bearing ribs 104 connected to the rear surface of the rear wall are integrally provided to protrude. A nut 105 is press-fitted into a cylindrical boss integrally formed on the back surface of the handle portion 76, and a nut 105 is attached to the back surface of the base portion. Cover support projection 106 is integrally formed.

As shown in FIG. 6, a reflecting plate 72 obtained by bending a color steel plate having a white coating film has a horizontal plate portion and a slanted plate portion bent obliquely backward and downward from the horizontal plate portion. And a bearing edge 72a that is bent in a substantially U-shaped cross section on the back side of the lower end of the inclined plate portion. The reflecting plate 72 has the rear surface of the horizontal plate portion abutted against each of the reflecting plate support ribs 101 and has a bearing edge 72a.
Is hooked on the reflector support rib 103 and is disposed in the shade 71, and in this state, the reflector support rib 10 is passed through the horizontal plate portion.
It is attached via a fixing screw 78 screwed to the first. With this mounting, both ends in the longitudinal direction of the bearing edge 72a are arranged so as to abut against the bearing ribs 104, respectively.

The lamp sockets 73 are attached to both ends of the horizontal plate portion of the reflection plate 72 in the longitudinal direction from the upper side to the lower side. A fluorescent lamp 74 is mounted over these lamp sockets 73. As the fluorescent lamp 74, a lamp having a photocatalyst layer 74a on the outer peripheral surface of the tube wall is used. The photocatalyst layer 74a is mainly composed of titania particles and has a function of decomposing acetaldehyde and the like.

The lamp cover 75 is an integrally molded product of a synthetic resin such as a translucent acrylic resin having a milky white color and having a light diffusing performance. As shown in FIGS. 6, 7, and 9, the lamp cover 75 includes a cover main portion 111, a socket cover portion 112, a rear opening portion 113, and a plurality of ribs 11.
4a to 114d.

The cover main portion 111 is a belt-like portion extending longer than the fluorescent lamp 74, and has an oblique shape that gradually decreases from the front side to the rear side. At the front edge of the middle part of the cover main part 111, a mounting tongue piece 115 is integrally provided to protrude forward. The mounting tongue 115 is shaped to fit into the base of the handle 76. The socket cover portions 112 are integrally provided at both longitudinal ends of the cover main portion 111. These cover parts 1
Reference numeral 12 is formed to have a width dimension in the front-rear direction longer than that of the cover main portion 111, and shaft portions 116 opposed to each other are integrally formed at the rear end thereof. Accordingly, the shape of the lamp cover 75 as viewed from below is a horizontally long U-shape as shown in FIG.
A rear opening portion 113 is defined by 11 and a pair of left and right socket cover portions 112. The opening 113 is provided on the rear side of the cover main part 111.

The lamp cover 75 has a pair of shaft portions 116 formed by the bearing ribs 104 of the shade 71 and the reflecting plate 72.
After being arranged so as to be sandwiched between the bearing edge 72a and the mounting tongue 115, the fitting tongue 115 is fitted into the base of the handle portion 76 of the shade 71. It is attached to the lower surface of the shade 71 by tightening a detachable hand screw 117 to be screwed. When the screw 117 is tightened, the mounting tongue 115 is supported by the cover support projection 106 on the back surface. Further, as described above, the shaft 11 at both ends in the longitudinal direction is formed by the bearing rib 104 and the bearing edge 72a.
The lamp cover 75 with the support 6 is provided with a hand screw 116
Can be opened about the shaft portion 116, and the opening of the shaft portion enables the replacement of the fluorescent lamp 74.

In the lamp cover 75 attached to the shade 71 as described above, the cover main part 111 is disposed so as to cover the front side and the lower side of the fluorescent lamp 74, and a pair of left and right socket cover parts 112 is formed by a lamp socket. The rear opening portion 113 is disposed so as to cover the front side and the back side of the fluorescent lamp 73, and is provided below the center of the fluorescent lamp 74 so as to face the rear side of the fluorescent lamp 74. Further, the front edge of the lamp cover 75 is not in close contact with the inner surface of the front wall of the shade 71, and is opened between them so that the air in the lamp body 15 can pass forward. Furthermore, the width of the cover main part 111 in the front-rear direction is such that the lamp body 15 has a maximum depression angle of 40 °.
Even when the fluorescent lamp 7 is turned up to
4 is set to a width (approximately 43 mm) so as not to be visible. By setting this width, as described above, the cover main part 1
11 is attached to the shade 71 so as to cover the lower front part of the fluorescent lamp 74, and the rear open part 113 (the width is about 29 mm) can face the rear part of the fluorescent lamp 74.

The ribs 114a to 114d are arranged in the width direction of the main portion 111 on the front rear surface of the cover main portion 111, and are integrally protruded vertically upward. These ribs 114a to 114d are provided so as to overlap each other in the vertical direction. That is, when the cover main part 111 is viewed from the horizontal direction,
Similarly, the upper end of the third rib 114c from the front wraps around the root of the second rib 114b so that the upper end of the second rib 114b wraps around the root of the rib 114c. The deepest rib 1 at the base
Each of the ribs 114a to 114d is formed so as to have a height such that the upper end of 14d overlaps.

The ribs 114a to 114d extend in the longitudinal direction of the lamp cover 75, and both ends thereof extend to the rear side of the lamp socket 73 as shown in FIG. In other words, both ends of the ribs 114a to 114d are formed to extend to the front rear surface of the socket cover 112, respectively.

A hollow shaft 81 (see FIG. 5) is integrally protruded rearward from a longitudinally central portion of the rear wall of the shade 71 of the lamp body 15 having the above-described structure. No output wire is introduced into the lamp body 15. The hollow shaft 81 and the distal end of the slide arm 52 are connected via a joint mechanism 80, and the lamp body 15 is connected to the distal end of the arm 14 so as to be three-dimensionally movable by this mechanism 80. I have. The joint mechanism 80 will be described below with reference to FIGS.

Arm housing 6 of slide arm 52
An upper vertical shaft 82 is integrally formed on the upper surface of the front end portion of the front end 1.
A fitting cylinder 84 (see FIG. 4) formed at the rear of the third fitting 3 is rotatably fitted. Then, a fixing screw 85 is inserted from above through the vertical shaft joint 83 and the vertical shaft 82, and the screw 85 is screwed into the center of the movable rail 62 and fastened. The fixing screw 85 has a finger hook and can be turned by hand, and is fixed so that the vertical shaft joint 83 does not come off from the vertical shaft 82 by tightening.
The vertical shaft joint 83 can be rotated in the left-right direction by about 60 ° around the vertical shaft 82, and accordingly, the lamp body 15 is moved in the direction of arrow C in FIG. The frictional engagement force in this rotation can be adjusted by adjusting the tightening of the fixing screw 85. In FIG. 5, reference numeral 83a denotes a fixing screw 85.
It is a dent that receives the head.

A horizontal shaft joint 86 made of a synthetic resin and formed in a U-shape so as to sandwich the joint 83 from both sides in the width direction is fitted on the front outer side of the vertical shaft joint 83. A metal screw receiving plate 87 bent in a U-shape is arranged inside the front part of the joint 83. A pair of left and right fixing screws 88 inserted in the width direction of the two shaft couplings 83 and 86 are screw holes 87 of the screw receiving plate 87.
a and screwed to each other. These fixing screws 88 have a finger hook and can be turned by hand, and the vertical joint 83 and the horizontal joint 86 are connected by tightening. The horizontal shaft joint 86 can be turned about 40 ° upward with respect to the fixing screw 88 as the elevation angle and about 90 ° downward with the depression angle, so that the lamp body 15 moves in the direction of arrow D in FIG. It is supposed to be. The frictional engagement force in this rotation can be adjusted by adjusting the tightening of the fixing screw 88.

A bearing hole 89 is formed at the center in the width direction of the horizontal shaft coupling 86, and a hollow shaft 81 is formed in the bearing hole 89.
Is rotatably fitted, and a bearing ring 90 inserted from the horizontal shaft joint 86 side is screwed to the hollow shaft 81. A part of the bearing ring 90 is axially hooked on the hole wall of the bearing hole 89 to prevent the hollow shaft 81 from falling out of the bearing hole 89. The hollow shaft 81 of the lamp body 15 can be rotated by about 90 ° in the direction around the axis with respect to the bearing hole 89 of the horizontal joint 86 so that the lamp body 15 is moved in the direction of arrow E in FIG. It has become. The frictional engagement force in this rotation can be adjusted by adjusting the number of screws (not shown) for tightening the bearing ring 90.

That is, the lamp body 15 can be moved along each direction of arrows A to E in FIG. 3 by the joint mechanism 80 having the above-described structure. This is done for the tip.

As shown in FIG. 4, the inverter lighting device 16 is composed of a high-frequency conversion circuit formed by various circuit components 96 (only two of which are shown) mounted on a rectangular printed circuit board 95. A high frequency is obtained by converting a commercial frequency, and the high frequency is applied to the fluorescent lamp 74 to turn on the lamp 74. The printed circuit board 95 of the device 16 is screwed into the arm housing 61. The printed circuit board 95 has substantially the same size as the movable rail 62,
Are arranged facing each other at an interval of about 15 mm or less. With the above mounting, the inverter lighting device 16
It is attached to the arm 14 which is surrounded by the arm housing 61 and the movable rail 62 and located between the column 13 and the lamp body 15.

The input portion of the inverter lighting device 16 has a wire passage hole 56 c
An input wire (not shown) introduced through is connected. This input electric wire is connected to the support side power cord 97 in the support 3, and the plug included in the cord 97 is led out from the lower end of the support 3 and is connected to the outlet 31 of the outlet box 12. (See FIG. 1). An output wire (not shown) is connected to an output section of the inverter lighting device 16. This output wire is connected to the vertical shaft coupling 83 from the front end of the slide arm 52.
Through the hollow shaft 81 of the lamp body 15 fitted to the horizontal shaft joint 86, and is drawn into the lamp body 15 and connected to the lamp socket 73 and the switch 77, respectively.

In the luminaire 4 having the above-described structure, since the cover main portion 111 of the milky white lamp cover 75 covers the front side of the fluorescent lamp 74, the light can be attenuated by the light diffusing action of the cover main portion 111. Moreover, the vertical ribs 114a to 114b extending in the longitudinal direction are provided on the back surface of the cover main portion 111.
And these ribs 114a-114
Since d is provided so that the upper end of the rib at the rear position overlaps the root of the rib at the front position when the cover main portion 111 is viewed from the horizontal direction, the light path indicated by the arrow A in FIG. As can be seen, the light projected forward through the front part of the cover main part 111 first passes through one rib and then transmits through the front part of the cover main part 111. In this manner, the forward light can be attenuated in two stages. Therefore, glare to the front can be more effectively suppressed.

However, despite such glare reduction, the illuminance on the desk can be sufficiently ensured. That is, since there is no rib at the rear of the cover main part 111 which covers the lower part of the front of the fluorescent lamp 74, the light passing therethrough (represented by the optical path B in FIG. 6) is less attenuated, and the lamp is further reduced. The cover 75 does not cover the entire open lower surface of the shade 71 and has a rear open portion 113 on the rear side of the cover main portion 111.
Can be irradiated downward. Therefore, the above-described illumination B (indicated by an arrow c in FIG. 6 as a representative of the optical path) is mainly used, and the above-described light B is added thereto. Illuminance can be improved.

In addition, since the longitudinal ends of each of the ribs 114a to 114d extend to the rear side of the lamp socket 73, the rear side of the lamp socket 73 is illuminated by irregular reflection at the ends of the ribs 114a to 114d. be able to. Therefore, the shadow of the lamp socket 73 is less likely to be reflected on the socket cover portion 112 covering the socket 73, so that the difference in brightness of the entire lamp cover 75 can be reduced and the appearance of the appliance can be improved.

When the lamp is turned on, the lamp cover 75 has the rear opening 113 as described above, and as shown by a dotted arrow d in FIG. The outside air flows in from the rear opening 113 of the lamp cover 75 located in the lamp body 75, and the outside air flows around the fluorescent lamp 74, and then flows out of the lamp body 15 through a gap such as the front side of the lamp body 15. Can be done.
Therefore, the temperature rise of the fluorescent lamp 74 and the lamp body 15 due to the circulation of the outside air can be suppressed.

In this case, the fluorescent lamp 74 is
a, the outside air flows in the lamp body 15 as described above while being in contact with the
The smell and dirt in the air flowing around can be decomposed and purified by the decomposing function of the photocatalytic layer 74a.

Since the lamp 15 is attached to the arm 14 supporting the lamp so as to be rotatable in the vertical direction, the lamp 15 obtains an elevation angle when the front side of the learning desk 1 is illuminated. As described above. In this case, since the width of the cover main portion 111 is set so that the fluorescent lamp 74 is not visually recognized even when the lamp body 15 is rotated to the maximum elevation angle, the direct light of the fluorescent lamp 74 may enter the eyes. Lighting equipment 4
Appearance can also be improved.

Further, since the lamp cover 75 of the luminaire 4 having the above configuration covers not only the front side but also the lower side of the fluorescent lamp 74 with the cover main part 111, the protection performance of the fluorescent lamp 74 can be improved. In particular, since the fluorescent lamp 74 is covered by the cover main portion 111 even when the lamp body 15 is rotated to the maximum elevation angle as described above, the fluorescent lamp 74 when the lamp body 15 is rotated to the maximum elevation angle is rotated. Protection performance can also be improved.

Further, since the lamp cover 75 covers the front side and the rear side of the lamp socket 73 with the socket cover portions 112 at both ends in the longitudinal direction, the cover covering the front side and the lower side of the fluorescent lamp 74 as described above. By making the fluorescent lamp 74 and the lamp socket 73 difficult to visually recognize together with the main part 111, the appearance of the lamp 15 and thus the entire lighting fixture 4 can be improved. Moreover, since the lamp cover 75 has the socket cover portions 112 at both ends in the longitudinal direction as described above, the strength of the entire cover 75 can be improved,
Therefore, the above-mentioned reinforcing effect and fluorescent lamp protecting effect can be enhanced.

According to the configuration of the luminaire 4 of this embodiment, since the inverter lighting device 16 for illuminating the fluorescent lamp 74 at high frequency is attached to the arm 14 between the lamp body 15 and the support 13, the lighting device 16 is used. The pillar 13 and the lamp 15 can be made smaller in size than the case where they are built in the lamp 15 or the pillar 13.
5 and the inverter lighting device 1
Since the weight of the lamp 6 is not added to the lamp 15, the operability when the lamp 15 is moved in the directions of arrows C to E in FIG. In addition, due to the arrangement of the inverter lighting device 16, the position of the inverter lighting device 16 with respect to the fluorescent lamp 74 is constant irrespective of the expansion and contraction of the arm 14, and the wiring distance of the output wire to the fluorescent lamp 74 can be shortened. In addition, the high frequency can be efficiently applied to the fluorescent lamp 74, the heat of the fluorescent lamp 74 spreading to the inverter lighting device 16 can be reduced, and the temperature rise of the inverter lighting device 16 can be reduced. However, in the present invention, the lighting device 16 includes the support 13 or the lamp 1.
5 may be incorporated.

[0062]

The present invention is embodied in the form described above and has the following effects.

According to the first aspect of the present invention, the structure of the lamp cover of the lamp body can suppress glare in front of the lamp body and increase in the temperature of the lamp body. A lighting fixture capable of improving the strength of the lamp cover can be provided.

According to the second aspect of the present invention, the illumination directly below the fluorescent lamp can be obtained, and the illuminance of the illuminated surface such as a desk can be further improved.

According to the third aspect of the present invention, the visual appearance of the fluorescent lamp can be prevented to improve the appearance of the appliance, and the direct light can be prevented from entering the eyes.

According to the fourth and fifth aspects of the invention, since a plurality of ribs are provided, glare toward the front can be further suppressed and the strength of the lamp cover can be improved.

According to the sixth aspect of the present invention, the light is attenuated in two stages by the rib and the cover main portion, and the glare to the front can be more effectively suppressed.

According to the seventh aspect of the present invention, the shadow of the lamp socket is hardly reflected on the socket cover, and the appearance of the appliance can be improved.

According to the eighth aspect of the present invention, the smell and dirt in the air flowing around the fluorescent lamp can be decomposed and purified by the decomposing function of the photocatalytic layer.

According to the ninth aspect of the present invention, the glare and the temperature rise of the lamp body can be suppressed, and the illuminance of the appearance and the illuminated surface, the protection performance of the fluorescent lamp, and the strength of the lamp cover can be respectively improved. Since the apparatus is provided, it is possible to provide a desk with a high-quality lighting apparatus, such as an improvement in desk illuminance while reducing glare, or a method of purifying air near a user who uses the desk.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a learning desk according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a lighting fixture provided in the learning desk of FIG. 1 according to the embodiment of the present invention.

FIG. 3 is a perspective view showing an assembled state when the lighting apparatus of FIG. 2 is directly attached to a desk top plate.

FIG. 4 is a vertical sectional side view showing the lighting fixture of FIG. 3;

5 is an exploded perspective view showing a part of the lighting apparatus of FIG. 2;

FIG. 6 is a sectional view showing a lamp body included in the lighting apparatus of FIG. 2;

FIG. 7 is a bottom view showing a lamp body included in the lighting apparatus of FIG. 2;

FIG. 8A is a bottom view showing a part of a shade provided in the lamp body of FIG. 7; FIG. 9B is a cross-sectional view taken along the line ZZ in FIG. FIG. 9C is a cross-sectional view taken along line YY in FIG.

FIG. 9A is a side view showing a lamp cover provided in the lamp body of FIG. 6; FIG. 7B is a bottom view showing the end of the lamp cover provided in the lamp body of FIG. 6. (C) is a sectional view taken along line XX in FIG. 9 (B).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Learning desk 2 ... Desk main body 2a ... Top plate 3 ... Book stand 4 ... Lighting equipment 13 ... Support 14 ... Arm 15 ... Lamp body 71 ... Shade 73 ... Lamp socket 74 ... Fluorescent lamp 74a ... Photocatalytic layer 75 ... Lamp cover 80 ... joint mechanism 81 ... hollow shaft 83 ... vertical shaft coupling 86 ... horizontal shaft coupling 88 ... fixing screw 89 ... bearing hole 111 ... cover main part 112 ... socket cover part 113 ... rear opening part 114a-114d ... rib

Continued on the front page (72) Inventor Norimasa Suzuki 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation (72) Inventor Mitaka Takahashi 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology F term in reference (reference) 3B053 SB02 SB04 SB05 SB06 3K014 AA02 DA05 PA05

Claims (9)

[Claims] 1. A support, an arm connected to an upper end of the support, a shade connected to a tip of the arm and having an open lower surface, and lamps disposed at both ends in the longitudinal direction of the shade. A socket, a straight tube fluorescent lamp removably supported over the lamp sockets, a cover main part covering the front side and the lower side of the lamp, and front and back sides of the lamp socket integrally provided at both longitudinal ends of the main part. And a lamp body having a diffusely translucent lamp cover attached to the shade including a rear open portion defined by the cover main portion and both socket cover portions. A lighting fixture characterized by comprising: 2. The luminaire according to claim 1, wherein the rear opening portion is opposed to a rear portion of the fluorescent lamp. 3. The fluorescent lamp is attached to the arm so as to be rotatable up and down with respect to the arm, and the fluorescent lamp can be visually recognized even when the width of the cover main part is turned to a maximum elevation angle. The lighting device according to claim 1, wherein the lighting device is set so as not to be performed. 4. The cover according to claim 1, wherein ribs arranged in the width direction of the cover main portion and extending in the longitudinal direction of the cover main portion are integrally provided on the back surface of the cover main portion. The lighting fixture according to any one of the above. 5. The cover according to claim 4, wherein said cover main portion has an inclined shape which gradually lowers from its front side to its rear side, and said ribs are vertically projected.
The lighting fixture according to 1. 6. The cover according to claim 5, wherein each of the ribs is provided such that the upper end of the rib at the rear position overlaps the root of the rib at the front position when viewed from the horizontal direction. The lighting fixture according to 1. 7. The luminaire according to claim 4, wherein an end of each of the ribs is located on a rear side of the lamp socket. 8. The luminaire according to claim 1, wherein a photocatalytic layer is applied to an outer peripheral surface of a tube wall of the fluorescent lamp. 9. A desk body having a top plate, a book stand mounted on the top plate, and the column is fixedly mounted on the book stand to illuminate the top surface of the top plate. A lighting fixture according to any one of the preceding claims.