JP2001014928A - Luminaire and desk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the appearance of a lamp body and the commercial value of the luminaire as a whole, utilizing structure of fitting a lamp cover to a shade. SOLUTION: A lamp body 15 supported to a support via an arm is provided with a shade 51 opened at the lower face and connected to the arm, lamp sockets 53 respectively arranged at both longitudinal ends of the shade 51, a straight tube type fluorescent lamp 54 supported to both sockets 53, and a synthetic resin lamp cover 55 fitted to the shade 51. Both ends of the cover 75 are respectively supported to ribs (cover support parts) 64 provided at both longitudinal ends of a rear wall 51b of the shade 51, and the longitudinal center part of the cover 55 is thread-fastened to a thread fastening part 65, provided at the longitudinal center part of a front wall 51a of the shade 51. The cover 55 is thereby supported to the shade 51 at three points. The shade 51 is provided with a rib (a cover-abutting protruding part) 66 near the thread fastening part. In association with this thread fastening, the longitudinal center part of the cover 55 is deformed with the rib 66 as a fulcrum to forcibly warp the cover 55.

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 includes a shade, a lamp socket, a fluorescent lamp, and a lamp cover. A lamp cover longer than the entire length of the lamp is attached to the long shade by screwing or the like so as to cover the straight tube fluorescent lamp.

[0003] By the way, in fluorescent lamps used for desk lighting, in particular, in those in which the lamp body can be rotated in the horizontal direction around the axis of a vertical axis, it is generally shorter than the horizontal width of the desk (usually).
243 mm or 410 mm), but if a long straight tube fluorescent lamp of, for example, 630 mm or 830 mm is employed in order to secure a wide illumination area on the desk, the lamp cover is naturally formed longer accordingly. The following problems have been found to occur.

That is, since a lamp cover is generally obtained by injection-molding a synthetic resin material such as an acrylic resin which is translucent and translucent, the longer the length of the lamp cover, the easier it is for molding distortion to occur in the longitudinal direction. This molding distortion occurs as a warp such that the center of the lamp cover becomes convex toward the cover surface toward the center in the longitudinal direction with respect to both ends of the lamp cover. In particular, a glare reducing rib is integrally provided on the rear surface of the lamp cover. It occurs remarkably in the case.

Heretofore, there has not been proposed any lighting fixture which takes measures against such molding distortion of the lamp cover. However, if the lamp cover has the molding distortion, the appearance of the lamp body is impaired, and the lamp cover has an impression that the lamp cover is defective, which impairs the merchantability. Therefore, an improvement is desired.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting apparatus and a desk which can improve the appearance of a lamp body and the merchantability of the whole apparatus by utilizing a structure in which a lamp cover is attached to a shade. It is in.

[0007]

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. And a lower surface is opened, and one of the front wall and the rear wall has a threaded portion at a longitudinal center portion and a cover support portion at both longitudinal ends of the other wall. A shade having a cover abutting projection protruding in the vicinity of the screwing portion, lamp sockets respectively disposed at both ends in the longitudinal direction of the shade, and a straight tube type removably supported over these lamp sockets. The fluorescent lamp has a pair of supported portions supported by the cover support portion at both ends in the longitudinal direction, and has a mounting tongue piece screwed to the screw portion at a middle portion in the longitudinal direction; The cover contact projection on one side of the tongue Contact, is characterized in that anda fixture comprising a said fluorescent lamp at least partially covers attached to the shade translucent synthetic resin lamp cover.

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 may be mounted on 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 may be fixed or movably attached 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 the shade is desirably non-translucent.
It is desirable that the lamp cover has a milky white color so as to obtain diffused light transmission performance. Further, in the present invention and each of the following inventions, the cover supporting portion may have any structure as long as it can be supported by the shade so that the lamp cover does not fall off. For example, the cover supporting portion may be formed by a screw receiving boss or the like into which a screw is screwed. The screw portion of the shade may be a simple screw receiving boss or a configuration in which a nut is press-fitted in the boss. Moreover, in the present invention and each of the following inventions, the cover contact projection can be formed by a rib, a boss, or the like, and the lamp cover has a projection on its back surface that contacts the cover contact projection. In this case, the height of the cover contact projection may be lower than the height of the screwed portion. Further, in the present invention, the lamp cover can be rotatably or non-rotatably attached to the shade. 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 lamp cover is attached to the shade of the lamp body by supporting the lamp cover at three points in the following procedure. That is, first, the supported portions at both ends in the longitudinal direction of the lamp cover are supported by cover support portions provided at both ends in the longitudinal direction of the front wall or the rear wall of the shade, respectively. The mounting tongue is screwed to a threaded portion provided at the longitudinal center of the front or rear wall of the shade. In this mounting, since the back surface of the mounting tongue abuts against the cover abutment projection of the shade, the central portion in the longitudinal direction of the lamp cover is directed toward the back side of the cover with the cover abutment projection as a fulcrum. Is flexibly deformed. Thereby, it is possible to correct the warp due to the molding distortion which the synthetic resin lamp cover has in advance.

[0010] The lighting apparatus according to the second aspect of the present invention, wherein the supported portion is formed in an axial shape, and the lamp body has a reflector fixed to the inner surface of the shade. The cover supporting portion formed on the trailing edge and the cover supporting portion of the shade are pivotally supported so as to sandwich the shaft-shaped supported portion.

In the present invention, since the axially supported portions formed at both ends in the longitudinal direction of the lamp cover are supported by the shade and the cover supporting portions of the reflector, screws for fixing the mounting tongue to the screwing portion are provided. When the lamp is removed, the lower surface of the shade can be opened and closed by rotating the lamp cover around the supported portion, so that the lamp can be replaced. In addition, when the lamp cover is attached to the shade, only one screwing point of the lamp cover is required as described above, so that the labor required for opening and closing the lamp cover can be reduced.

According to a third aspect of the present invention, in the lighting device, a handle portion having an open lower surface is provided so as to protrude forward at a substantially central portion in a longitudinal direction of the front wall, and is provided on a back surface of one root portion of the handle portion. It is characterized in that the screw portion is provided.

[0013] In the present invention, since the screw is stored on the back side of the handle portion, the cover fixing screw screwed into the screw portion can be prevented from being visually recognized, the appearance can be improved, and the cover fixing screw can be attached to the screw portion. When inserting and removing the lamp, the lamp can be moved closer to the front rather than the rear, so that the workability required for opening and closing the lamp cover can be improved.

According to a fourth aspect of the present invention, in the lighting apparatus, the cover contact protrusion disposed between the cover support portion and the screw portion of the shade is higher than the cover support portion and the screw portion. Features.

According to the present invention, when the mounting tongue of the lamp cover is screwed to the threaded portion of the shade, the cover abutment projection of the shade is securely brought into contact with the back surface of the mounting tongue, thereby securing the lamp cover. Can be corrected by the screwing.

According to a fifth aspect of the present invention, there is provided the lighting apparatus, wherein the tongue support projection is provided on the side of the shade opposite to the cover abutting projection with the screw engagement portion therebetween, and the support projection is screwed into the screw. It is characterized by being higher than the part.

In the present invention, when the mounting tongue of the lamp cover is screwed to the threaded portion of the shade, the tip of the mounting tongue is supported by the tongue supporting projection from the back surface with the tightening of the cover fixing screw. Therefore, excessive correction of the lamp cover can be prevented, and accordingly, the warpage of the lamp cover can be properly corrected.

According to a sixth aspect of the present invention, there is provided a desk body having a top plate, a book stand mounted on the top plate, and fixing the column to the book stand and mounting the top surface of the top plate. The lighting device according to any one of claims 1 to 5 for lighting.

According to the present invention, since there is provided a lighting device capable of correcting the warpage of the lamp cover and improving the appearance of the lamp body and the commercialization of the whole device, a long lamp body capable of securing a wide desk lighting area can be employed. A desk with quality lighting equipment can be provided.

[0020]

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 having no bookstand 3, a clamp 11 and an outlet box 12 are arranged at the lower end of the support post 3 as shown in FIGS. Can be mounted by clamping the clamp 11 on the edge of the top plate 2a of the desk body 2 in an assembled state.

As shown in FIGS. 2 to 4, the metal clamp 11 comprises 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 FIG. 3, the clamp 11 and the outlet box 12 are mounted with the lower end of the column 13 interposed therebetween in the front-rear direction. Further, when the lighting apparatus 4 was mounted on the book stand 3, the clamp 11 and the support column 13 were respectively positioned on the back side of the back plate 3a of the book stand 3, and the outlet box 12 was positioned on the front side of the back plate 3a. In this state, the screw 37 that passes through the holes provided in the vertical piece 21, the lower end of the column 13, and the back plate 3 a is screwed into the back plate 36 of the outlet box 12 and tightened. This mounting state is shown in FIG.

At the upper end of the column 13, the arm 14
Is installed. As shown in FIG.
Support arm side base 41 and lamp body side slide arm 42
Are formed. The arm base 41 is mounted on both sides of a reference position that projects straight forward with respect to the support column 13 so as to be rotatable in the horizontal direction by about 30 ° as indicated by an arrow A in FIG. The slide arm 42 is slidably connected to the arm base 41 in the longitudinal direction. Thereby, the arm 14
Is provided so as to be able to expand and contract by approximately 110 mm in the front-rear direction as indicated by the arrow B in FIG. 3 by the push-pull operation of the slide arm 42.

Next, the structure of the lamp body 15 supported by the front end (tip) of the arm 14 will be described with reference to FIGS. The lamp body 15 includes a shade 51, a reflector 52, a pair of lamp sockets 53, a straight tube fluorescent lamp 54, a lamp cover 55, a switch 57, and the like.

The shade 51 is made of a non-translucent synthetic resin.
It has a substantially semi-cylindrical shape with an open lower surface. A handle portion 56 protruding forward is integrally formed at the center of the shade 51 in the longitudinal direction, and a switch 57 is provided near the position where the thumb reaches when the handle portion 56 is gripped.
Is installed. The handle portion 56 used as a handle for moving the lamp body 15 to an arbitrary posture has an open lower surface, and integrally connects a pair of root portions 56a forming both ends to the front wall 51a of the shade 51. It is protruding. The switch 57 is a push type, and
The turning-on / off of the fluorescent lamp 54 is performed.

As shown in FIG. 8, on the inner surface of the shade 51, a plurality of reflector support ribs 61 extending in the front-rear direction are integrally provided at several places in the longitudinal direction. A cover support rib 62 connected to the back surface of the front wall 51a and a reflector support rib 63 connected to the back surface of the rear wall 51b are integrally formed at several places in the longitudinal direction of the seed 51, respectively. Further, bearing ribs 64 as shaft support portions are integrally formed on the back surface of the rear wall 51b at both ends in the longitudinal direction of the shade 51, as a cover support portion.

A threaded portion 65 is provided on one of the roots 56a of the handle portion 56 of the shade 51, that is, on the back surface of the portion of the shade 51 offset from one half of the longitudinal direction to one end. This screw portion 65
As shown in FIG. 8C, a nut 65b is press-fitted into a cylindrical boss 65a integrally formed on the back surface.
Further, on the back surface of the shade 51, a partition rib 66 for separating the back space of the handle portion 56 and the other back space of the shade 51 at the one root portion 56a extends in the longitudinal direction of the shade 51 and is integrally formed. Is formed. The partition rib 66 is located between the cover support rib 62 and the screw portion 65 and is used as a cover contact projection. In addition, on the back surface of the one root portion 56a, a tongue piece supporting projection comprising a boss and an arc-shaped rib is located near the screwing portion 65 on the side opposite to the partition rib 66 with the screwing portion 65 therebetween. 67 are integrally formed. Partition ribs 66 and tongue support protrusions 67 provided on both sides of the screw portion 65
Is formed higher than the threaded portion 65 as shown in FIG.

As shown in FIG. 6, a reflecting plate 52 obtained by bending a color steel plate having a white coating film has a horizontal plate portion and a slanted plate portion bent obliquely rearward and downward from the horizontal plate portion. And a bearing edge 52a having a substantially U-shaped cross section and being bent on the rear surface side of the lower end of the inclined plate portion. The bearing edge 52a is used as a cover support, particularly as a shaft support. The reflecting plate 52 is arranged in the shade 51 by bringing the back surface of the horizontal plate portion into contact with each of the reflecting plate supporting ribs 61, and hooking the bearing edge 52a to the reflecting plate supporting ribs 63. It is attached via a fixing screw 58 screwed into the reflector supporting rib 61 through the plate portion. With this mounting, the bearing edge 5
Both ends in the longitudinal direction of 2a are opposed to each other so as to contact the bearing rib 64, and the bearing rib 64 and the bearing edge 52a thus combined form a bearing.

The lamp sockets 53 are attached to both ends in the longitudinal direction of the horizontal plate portion of the reflection plate 52 by penetrating the same from the upper side to the lower side. A fluorescent lamp 54 is mounted over these lamp sockets 53.

The lamp cover 55 is an integrally molded product obtained by injection-molding a synthetic resin such as a translucent acrylic resin having a milky white color and having a light diffusing performance. This cover 55 is about
In the free state, as shown in FIG. 7, due to its length, the cover surface side at the center in the longitudinal direction is deformed so that the cover surface side is convex downward as shown in FIG. . As shown in FIGS. 5, 6, and 9, the lamp cover 55 includes a cover main portion 71, a socket cover portion 72, a rear opening portion 73, and a plurality of ribs 74a to 74d.
have.

The cover main portion 71 is a belt-like portion extending longer than the fluorescent lamp 54, and has an oblique shape that gradually decreases from the front side to the rear side. Cover main part 7
At the front edge of the intermediate portion 1, a mounting tongue piece 75 is integrally provided to protrude forward. The mounting tongue 75 has a shape that fits into one of the roots 56 a of the handle 56. The socket cover portions 72 are integrally provided at both ends in the longitudinal direction of the cover main portion 71. These cover parts 7
Reference numeral 2 has a width dimension in the front-rear direction longer than that of the cover main portion 71, and opposed shaft portions 76 integrally protrude from the rear end thereof. The shaft portion 76 is used as a supported portion that is supported by the bearing rib 64 and the bearing edge 52a that constitute the bearing. The shape of the lamp cover 55 as viewed from below is a horizontally long U-shape as shown in FIG. 5, and a rear opening portion 73 is defined by the cover main portion 71 and a pair of left and right socket cover portions 72. Have been.

Then, the lamp cover 55 is arranged such that the pair of shaft portions 76 are sandwiched between the bearing rib 114 of the shade 51 and the bearing edge 52a of the reflector 52, and then the mounting tongue 75 After fitting into the one root portion 56a of the handle portion 56, a hand screw 77 as a removable cover fixing screw which is screwed into the nut 65b of the screw portion 65 through the tongue piece 75 is tightened. , Are attached to the lower surface of the shade 51. Further, as described above, the lamp cover 55 in which the shaft portions 76 at both ends in the longitudinal direction are supported by the bearing rib 64 and the bearing edge portion 52a, the screw portion 76 is removed by removing the hand screw 77.
Can be opened at the center, and the opening allows the lamp to be replaced.

In the lamp cover 55 attached to the shade 51 as described above, the cover main part 71 is arranged so as to cover the front side and the lower side of the fluorescent lamp 54 as shown in FIG. A socket cover portion 72 is disposed to cover the front side and the back side of the lamp socket 53,
Further, a rear opening 73 is provided below the center of the fluorescent lamp 54 so as to face the rear side of the lamp 74.
As the fluorescent lamp 54, a lamp having a long tube length of, for example, 630 mm is employed so that an illumination area on the desk top surface can be secured widely over substantially the entire width of the top plate 2a.

The ribs 74a to 74d extending in the longitudinal direction of the lamp cover 55 are all arranged on the front rear surface of the cover main portion 71 in the width direction of the main portion 71, and integrally project vertically upward. . These ribs 74a-7
4 d is provided to reduce glare to the front and to improve the strength of the lamp cover 55. Further, both end portions of these ribs 74a to 74d are formed to extend to the rear side of the lamp socket 53, in other words, to the front rear surface of the socket cover 72, as shown in FIG. The back side of the lamp socket 53 is illuminated by diffuse reflection at the ends of these ribs 74a to 74d, so that the shadow of the lamp socket 53 is hardly reflected on the socket cover 72 covering the socket 73, and the entire lamp cover 55 The difference in brightness can be reduced. However, the ribs 74a to 74d can be omitted in the present invention.

The rear wall 5 of the shade 51 of the lamp body 15 having the above-described structure.
A horizontal hollow shaft (not shown) is integrally projected rearward from a central portion in the longitudinal direction of 1b, and an output electric wire (not shown) is introduced into the lamp body 15 through the hollow shaft. The hollow shaft and the distal end of the slide arm 52 are connected to the joint mechanism 8.
The lamp body 15 is connected by the mechanism 80 so that it can move three-dimensionally with respect to the distal end of the arm 14. That is, the lamp body 15 is rotatable about a vertical axis (not shown) in the direction of arrow C in FIG. 3 by about 60 ° at a time, and about a horizontal horizontal axis (not shown) at an elevation angle of about 40 ° and a depression angle of about 40 °. The arm 14 is rotatable by 90 ° in the direction of arrow D in FIG. 3 and about 90 ° in the direction of arrow E in FIG. Is connected to the front end. Therefore, the lamp body 15 can move along each direction of arrows A to E in FIG.

As shown in FIG. 2, the inverter lighting device 16 is built in a slide arm 42 of the arm 14. The apparatus 16 converts a commercial frequency to obtain a high frequency, and applies the high frequency to the fluorescent lamp 54 to turn on the lamp 54. The input part of the inverter lighting device 16 is connected to an input wire (not shown) introduced from inside the support column 13. 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). or,
An output wire (not shown) is connected to an output section of the inverter lighting device 16. This output wire is drawn into the lamp body 15 from the front end of the slide arm 52 through the joint mechanism 80, and is connected to the lamp socket 53 and the switch 57, respectively. In the present invention, the lighting device 1
6 may be incorporated into the support 13 or the lamp 15.

The lamp body 15 of the luminaire 4 having the above configuration is assembled in the following procedure.

First, the shade 51 is turned upside down so that its opening faces upward, and the lamp cover 55 is introduced inside the shade 51. The left and right shaft portions 76 of the cover 55 are respectively positioned behind the shade 51. It is set so as to be hooked on the bearing rib 64 on the inner surface of the wall 51b. Next, the lamp cover 55 is opened while keeping the set state, and then the reflection plate 52 having the lamp sockets 53 attached to both ends is introduced into the cover 55. In this case, the bearing edge 52a of the reflection plate 52 is put on the pair of shafts 76 so that the shafts 76 are sandwiched.
And the bearing rib 64 are combined to rotatably support the shaft portion 76.

Then, while maintaining this state, the fixing screws 58 that are screwed into the respective reflector supporting ribs 61 through the reflector 52 are tightened, and the reflector 52 is screwed inside the shade 51. Thereafter, the fluorescent lamp 54 is mounted between the lamp sockets 53 with the lamp cover 55 opened.

Finally, the lamp cover 55 is closed, whereby the hand screw 77 is passed through the mounting tongue piece 75 of the lamp cover 55 abutting on the partition rib 66 and the tongue piece support projection 67, and the screw 77 is screwed into the screw portion 65. The lamp cover 55 is fixed to the shade 51 by tightening the nut 65b.

The lamp body 15 can be assembled according to the above procedure. When replacing the lamp, remove the hand screw 77 and then open the lamp cover 55 with the pair of shafts 76 on the rear side as a fulcrum. I just need.

As described above, the lamp cover 55 of the lamp body 15 having the above-described structure has the rear side supported by the rear wall 51b of the shade 51 at both ends in the longitudinal direction, and the front side has the handle of the shade 51 at the center in the longitudinal direction. It is screwed to the root 56a. That is, the lamp cover 55 is attached to the shade 51 so as to be supported at three points.

Therefore, when the lamp cover 55 is attached to the shade 51 at the time of the assembly and the lamp is replaced,
Since only one place for screwing the lamp cover 55 is required, the labor required for opening and closing the lamp cover 55 when replacing the lamp is small, and the screw 77 is not provided at the rear of the lamp body 15 but near the front. Workability is good because it can be inserted into and removed from the screw portion 65.

Further, as described above, since the lamp cover 55 of the lamp body 15 is long, a molding distortion (warpage) occurs in the free state as shown in FIG. 7, but this warpage is as described above. Can be corrected by mounting the lamp cover 55 at three points with respect to the shade 51.

That is, as is clear from the above-described mounting procedure, the lamp cover 55 is supported by the rear wall 51b of the shade 51 at both ends in the longitudinal direction. The screw 51 is screwed to the threaded portion 65 on the front wall 51a side of the shade 51. Therefore, with the tightening of the thumb screw 77, the lever action is performed with the partition rib 66 abutting against the back surface of the mounting tongue piece 75 as a fulcrum. Cover 5
5 is deformed so that its center in the longitudinal direction is pushed up, that is, toward the back side of the cover 55. In this manner, the correction for eliminating the warpage due to the molding distortion which the synthetic resin lamp cover 55 has in advance is performed.

In this case, the partitioning rib 66 is
Is higher, the contact of the rib 66 with the mounting tongue piece 75 is reliably ensured, so that the leverage accompanying the tightening of the hand screw 77 is reliably obtained, and the lamp cover 55 is provided.
Warpage can be corrected.

Moreover, the toe 51 is provided with a tongue supporting projection 67 higher than the screwing portion 65 on the side opposite to the partitioning rib 66 with the screwing portion 65 interposed therebetween. The tip of the mounting tongue 75 is supported by the tongue supporting projection 67 from the back surface thereof, so that the lamp cover 55 can be prevented from being excessively deformed in such a way that the lamp cover 55 is warped in reverse with the tightening of the hand screw 77. Therefore, the lamp cover 5
5 can be properly corrected.

As described above, since the molding distortion of the lamp cover 55 can be corrected, the appearance of the lamp 15 and the lighting fixture 4 can be improved.
The overall merchantability can be improved. In addition, since the above-described correction of the warpage is performed by using the structure for attaching the lamp cover 55 to the shade 51, the structure is simple.

Further, in the state where the lamp body 15 is assembled, the hand screw 77 is stored on the back side of the handle portion 56, so that the screw 77 is not visually recognized. This can be improved, and the possibility that the hand screw 77 is inadvertently turned can be reduced. Further, a hand screw 77 located on the back side of the handle portion 56
Is out of the light transmission area of the lamp cover 55,
The shadow caused by the screw 77 is not projected on the desk surface.

[0053]

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 lamp cover is supported at three points on the shade, and the central portion in the longitudinal direction of the lamp cover is deformed with the cover contact projection as a fulcrum.
Since the molding distortion of the lamp cover can be corrected, it is possible to provide a lighting device that can improve the appearance of the lamp body and the commerciality of the entire device.

According to the second aspect of the present invention, the lower surface of the shade can be opened and closed by rotating the lamp cover for lamp replacement, and only one screwing point is required for attaching the lamp cover to the shade. Therefore, the labor required for opening and closing the lamp cover can be reduced.

According to the third aspect of the present invention, the appearance of the screw for fixing the lamp cover can be prevented, the appearance can be improved, and the workability required for opening and closing the lamp cover can be improved.

According to the fourth aspect of the present invention, when the lamp cover is screwed to the shade, the cover abutment projection of the shade is securely brought into contact with the back surface of the mounting tongue, and the lamp cover is warped due to molding distortion. Can be reliably corrected.

According to the fifth aspect of the present invention, it is possible to prevent an excessive straightening action due to the tightening of the screw and appropriately correct the warpage of the lamp cover.

According to the sixth aspect of the present invention, since there is provided a lighting device capable of correcting the warpage of the lamp cover and improving the appearance of the lamp body and the commercialization of the whole device, a long lamp body capable of securing a wide desk lighting area can be provided. It is possible to provide a desk with a high-quality lighting device that can be adopted.

[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 sectional view taken along the line ZZ in FIG. 1;

FIG. 5 is a bottom view showing a lamp body included in the lighting apparatus of FIG. 2;

FIG. 6 is a sectional view showing the lamp body of FIG. 5;

FIG. 7 is a front view of a lamp cover provided in the lamp body of FIG. 6;

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

FIG. 9A is a side view showing a lamp cover provided in the lamp body of FIG. 5; (B) is a bottom view which shows the edge part of the lamp cover with which the lamp body of FIG. 5 is provided. (C) is a sectional view taken along line WW in FIG. 9 (B).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Study desk 2 ... Desk main body 2a ... Top plate 3 ... Book stand 4 ... Lighting equipment 13 ... Prop 14 ... Arm 15 ... Lamp body 51 ... Shade 51a ... Front wall of shade 51b ... Rear wall of shade 52 ... Reflector 52a ... Bearing edge (reflection plate cover support) 53 ... Lamp socket 54 ... Fluorescent lamp 55 ... Lamp cover 56 ... Handle 56a ... Handle root 64 ... Bearing rib (shade cover support) 65 ... Screws Part 66: Partition rib (cover contact convex part) 67: Tongue piece support projection 75: Mounting tongue piece 76: Shaft part (supported part) 77: Hand screw (cover fixing screw)

Continuing from the front page (72) Inventor Naoki Sugishita 4-3-1 Higashi-Shinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation (72) Inventor Mii Takahashi 4-3-1 Higashi-Shinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation F term in the company (reference) 3B053 SB02 SB04 3K011 AA00 AA04 EC03 GA05 3K014 AA02 PA05

Claims (6)

[Claims] An arm connected to an upper end of the support, connected to a distal end of the arm, having a lower surface opened, and having one of a front wall and a rear wall. A shade having a threaded portion at the center in the longitudinal direction, a cover supporting portion at each of both longitudinal ends of the other wall, and a cover abutting projection protruding near the threaded portion. Lamp sockets respectively disposed at both ends in the longitudinal direction of the sail, a straight tube fluorescent lamp removably supported over these lamp sockets, and a pair of supported portions supported by the cover support at both longitudinal ends. And a mounting tongue screwed to the screwing portion at a longitudinal middle portion, and the mounting tongue side contacts the cover abutting projection to cover at least a part of the fluorescent lamp. Attached to the shade A fixture comprising a light-transmitting synthetic resin lamp cover,
A lighting fixture comprising: 2. The method according to claim 1, wherein the supported portion is formed in a shaft shape.
The lamp has a reflector fixed to the inner surface of the shade,
2. The illumination according to claim 1, wherein the cover-supporting portion formed on a front edge or a rear edge of the reflector and the cover-supporting portion of the shade are pivotally supported so as to sandwich the shaft-shaped supported portion. 3. Appliances. 3. A handle portion having an open lower surface is provided so as to protrude forward at a substantially central portion in a longitudinal direction of the front wall, and the screw portion is provided on a back surface of a root portion of the handle portion. The lighting device according to claim 1. 4. The cover as claimed in claim 1, wherein said cover contact projection disposed between said cover support portion and said threaded portion of said shade is higher than said cover support portion and said threaded portion. The lighting fixture according to any one of the above. 5. A tongue supporting projection is provided on the side of the shade opposite to the cover contact projection with the threaded portion interposed therebetween, and the supporting projection is higher than the threaded portion. The lighting fixture according to any one of claims 1 to 4. 6. 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 an upper surface of the top plate. A lighting fixture according to any one of the preceding claims.