JP2001023409A - Luminaire and desk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire having a lamp body movable largely and improve operatability in moving the lamp body. SOLUTION: To a support 13, an arm 14 is coupled in such a way as rotatable in the horizontal direction as shown by the arrow around the support 13, and a lamp body 15 having a lamp is coupled with the tip of the arm 14 in such a way as rotatable in the horizontal direction as shown by the arrow C around the arm tip. By this two-step movement, the lamp body 15 is allowed to move largely in the horizontal direction. The operating force to rotate the lamp body 15 relative to the arm 14 is made smaller than the operating force to rotate the arm 14 relative to the support 13. This permits the user to move the lamp body 15 easily as he wishes.

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 body having a fluorescent lamp is connected to the tip of the arm. The lamp body is generally provided so as to be movable with respect to the arm, and can take any position or posture for obtaining a desired illumination according to a moving operation by a user.

[0003] In order to increase the degree of freedom in selecting such an arbitrary lighting position and posture and to make it possible to largely move the lamp body, the present applicant has assigned most of the components from the support to the lamp body. As a result, a stand-type luminaire including a plurality of parts that are connected so as to be relatively movable and that move in the same direction has been developed. Specifically, while connecting the arm to the upper end of the support column so that it can rotate horizontally,
This lamp employs a configuration in which a lamp body is connected to the distal end portion of the arm via a joint mechanism so as to be horizontally rotatable in the same manner as the arm. Therefore, this lighting fixture moves the lamp body in two stages in the horizontal direction. It is excellent in that it can be moved greatly.

However, in such a configuration in which there are a plurality of starting points for moving the lamp body in the same direction, in the moving operation for moving the lamp body to a desired position, which starting point for a user, especially a child of lower grades, It is difficult to understand whether the lamp should be moved around the center, and if the lamp is moved ahead of the starting point on the side farther from the hand, move the lamp to the desired position. The operation is easily confused, and a large operation force is required. Therefore, it is required to improve this point.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a lighting apparatus and a desk which can move a lamp body greatly and can improve operability when moving the lamp body. It is in.

[0006]

According to a first aspect of the present invention, there is provided a lighting apparatus according to the first aspect, wherein the arm is movably connected to the support so as to be moved by a predetermined operating force. And a lamp body having a lamp and connected to the tip of the arm so as to be moved in the same direction as the movement direction of the arm with respect to the support with an operation force smaller than the predetermined operation force. It is characterized by having.

In the present invention and each of the following inventions, the moving direction of the arm with respect to the column and the moving direction of the lamp body with respect to the arm may be the same. Can be connected to the arm so that the lamp can be rotated horizontally. Similarly, when the arm is connected to the support so as to be movable in the front-rear direction, the lamp is connected to the arm in the front-rear direction. What is necessary is just to be provided movably connected. The lighting fixture of the present invention can be used as various kinds of stand lighting other than desk lighting.

According to the present invention, since the lamp body can be moved relative to the arm in the same direction as the movement direction of the arm with respect to the column, the lamp body can be largely moved by such two-step movement. Can be moved to a desired position. This two-stage movement is performed with the hand attached to the lamp body, but rather than the operating force for moving the arm with respect to the column located on the back side as viewed from the lamp body side, the lamp body is moved relative to the arm on the near side. Since the operating force for moving the arm was weakened, the lamp body was moved first, and then the arm was moved. Since the operation order is determined from the hand side to the back side in this way, there is no confusion in the operation of moving the lamp to a desired position, and the lamp can be easily moved as desired by the user.

A desk according to a second aspect of the present invention includes a desk main body having a top plate, and the lighting apparatus according to the first aspect, which is disposed on the top plate and illuminates the top surface of the top plate. It is characterized by the following.

[0010] In the present invention, since the lighting device is provided with a lighting device capable of greatly moving the lamp and improving the operability when moving the lamp, the lighting device of high quality such as easy to use in desk lighting is provided. Can provide desk with attached.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An 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.

[0013] As shown in FIGS.
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 and 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.
And a clamp shaft 24 threadedly engaged with the horizontal piece 22 in the vertical direction, and a horizontal piece 22 fixed to the upper end of the shaft 24.
And a handle 26 which is attached to the lower end of the clamp shaft 24 in a direction perpendicular to the axis. This clamp 11 is
By the rotation operation, the edge of the top plate 2a is sandwiched between the clamp plates 25 and the horizontal pieces 22 disposed on the upper and lower sides thereof, so that the top plate 2a is detachably attached to the desk body 2. In addition,
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. The outlet box 12 is provided with a power cord 35 having a plug which is inserted and connected to a wall outlet (not shown). 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) that closes 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 is composed of a metal fixed rail 55 having a U-shaped section, a synthetic resin base cover 56 which is opened at the upper surface and the fixed rail 55 is disposed and screwed to the opening. And FIG.
As shown in FIGS. 5 and 10, the base cover 56
Upward bosses 56a and 56b into which screws for fixing the fixed rail 55 are screwed are projected, and an electric wire through hole 56c is formed. The rear end of the base cover 56 that covers the fixed rail 55 from below is supported by a bolt 57 that penetrates both of them and is vertically screwed into the bent upper end of the core material 45 and a nut 57 a screwed thereto. 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. Thereby, the arm 14 can rotate as shown by an arrow A in FIG. The arm 14 is temporarily held by a click mechanism (not shown) at a reference position where the arm 14 is straight forward as shown in FIG.
Even in the rotated position, it is temporarily held. Therefore, by applying an operating force equal to or more than the frictional force for temporary holding by the click mechanism to the arm 14,
4 can be rotated in the horizontal direction, and the operating force is referred to as a first operating force a.

The slide arm 52 is provided with an arm housing 61 made of a flame-retardant synthetic resin having an open lower surface, and screwed to the housing 61 so as to substantially close the opening on the lower surface (FIGS. 7 and 7). 9) and a movable rail 62 made of metal. The movable rail 62 has a U-shaped cross section as shown in FIG. 9, is fitted over the fixed rail 55, and is slidably provided along the longitudinal direction of the rail 55. Therefore, by the push / pull operation of the slide arm 52 with respect to the arm base 51, the arm 14 is moved about 110
mm.

The rails 55 and 62 do not slide directly, but are respectively supported by a pair of U-shaped bearing plates 63 shown in FIG. 9 between a plurality of grooved bent portions facing each other. By sandwiching the steel balls 64 (only one is shown), the steel balls 64 are slidably combined via the steel balls 64 group. Each steel ball 64 is rotatably supported by a bearing plate 63 side by side in the moving direction of the movable rail 62. With this configuration, the sliding of the movable rail 62 with respect to the fixed rail 55 can be made smooth, and the combination state is maintained by each steel ball 64 being hooked on the groove-shaped bent portion. Further, a moderation imparting portion (not shown) is provided at each of two locations in the longitudinal direction of the groove-shaped bent portion, and the steel ball 64 gets on and gets caught there, thereby giving moderation to the arm base 51. Withdrawal and push-in of the slide arm 52 are regulated. Accordingly, the arm 52 can be moved in the front-rear direction by applying an operation force equal to or more than the frictional force by the moderation imparting portion to the slide arm 52, and the operation force is referred to as a second operation force B here.

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.

The lamp 15 is connected to the front end (tip) of the arm 14 so as to be movable with respect to the arm 14. As shown in FIG. 2 to FIG. 5, the lamp body 15 has a reflector 71 made of a metal plate screwed into a shade 71 extending long in the left-right direction (the width direction of the top plate 2 a). Lamp sockets 73 respectively mounted on both ends in the longitudinal direction
A straight tube-type fluorescent lamp 74 is mounted on one side (only one is shown), and a lamp cover 75 is mounted on the shade 71. Lamp cover 75 made of milky white translucent synthetic resin
Is provided so as to cover only the front half of the fluorescent lamp 74 so as to reduce glare to the front and to provide illumination directly below the desk.

The shade 71 is made of a non-translucent synthetic resin.
A handle portion 7 protruding forward is provided at the center in the longitudinal direction.
A push-type switch 77 is mounted at a position where the thumb reaches when the user grips the handle 6 and the handle 76. The on / off operation of the switch 77 turns on / off the fluorescent lamp 74. The handle portion 76 is used as a handle for moving the lamp body 15 to an arbitrary posture and position.

A hollow shaft 8 is provided at the center of the shade 71 in the longitudinal direction.
1 is integrally protruded rearward, and this hollow shaft 8
1, an output wire (not shown) 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. 6, 7, and 10.

The arm housing 6 of the slide arm 52
An upward vertical shaft 82 parallel to the bolt 57 is integrally formed on the upper surface of the front end portion of the fitting 1, and the vertical shaft 82 is fitted with a fitting cylinder 8 formed at the rear of a synthetic resin vertical shaft joint 83.
4 are rotatably fitted. And vertical shaft joint 8
3 and the vertical shaft 82, a fixing screw 85 is inserted from above, 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.
2, the vertical joint 83 is fixed so as not to come off, and the vertical joint 83 can rotate about 60 ° in the left-right direction along the periphery of the vertical axis 82, and accordingly the rotation direction of the arm 14 The lamp body 15 is horizontally moved in the same direction as A, that is, in the direction of arrow C in FIG.

The frictional force between the vertical shaft 82 and the vertical shaft joint 83 in this rotation can be adjusted by adjusting the tightening of the fixing screw 85. Therefore, the arm 14 can be turned in the horizontal direction by applying an operating force to the arm 14 that is equal to or greater than the frictional force that is adjusted by adjusting the tightening of the fixing screw 85. Called C. The frictional force between the vertical shaft 82 and the vertical shaft joint 83 that determines the third operation force is set so as not to be larger than the first operation force A even when the fastening of the fixing screw 85 is maximized. . 5 and 6, reference numeral 83a denotes a recess for receiving the head of the fixing screw 85.

A horizontal shaft joint 86 made of a synthetic resin and formed into a U-shape so as to sandwich the joint 83 from both sides in the width direction is fitted to 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 coupling 86 can rotate about 40 ° upward and about 90 ° downward about the fixing screw 88, and accordingly, the lamp body 15 is moved in the direction of arrow D in FIG. .

The frictional force between the two shaft joints 83 and 86 in this rotation can be adjusted by adjusting the tightening of the fixing screw 88. Therefore, by applying an operating force to the lamp body 15 that is equal to or higher than the frictional force that is adjusted by adjusting the tightening of the fixing screw 88,
The lamp body 15 can be turned up and down, and the operation force is herein referred to as a fourth operation force d.

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 is rotatable by about 90 ° around the axis with respect to the bearing hole 89 of the horizontal shaft joint 86, whereby the lamp body 15 is moved in the direction of arrow E in FIG. ing.

In this rotation, the bearing hole 89 and the hollow shaft 81
Can be adjusted by adjusting the number of screws (not shown) for tightening the bearing ring 90. Therefore, the lamp body 15 can be rotated by applying an operating force equal to or more than the frictional force adjusted by adjusting the tightening of the screw to the lamp body 15, and the operating force is referred to as a fifth operating force E here. .

With the above arrangement, the lamp body 15 can be moved along the directions indicated by arrows A to E in FIG. Will be The first to fifth operating forces A to E are set in the relationship of A>B>C>D> E at the time of shipment, and therefore, the operating forces for rotating in the same direction. I and ha have a relationship of i> ha.

The inverter lighting device 16 includes various circuit components 96 (only two are shown) mounted on a rectangular printed circuit board 95 as shown in FIGS.
The high frequency conversion circuit is formed by converting the commercial frequency to obtain a high frequency, and applying the high frequency 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, and is arranged close to and opposed to the rail 62. The printed circuit board 95 and the movable rail 62 are provided with a distance of about 15 mm or less in order to obtain high-frequency shielding and heat radiation of the inverter lighting device 16 by the rail 62. With the above-described mounting, the inverter lighting device 16 is mounted on the arm 14 located between the support 13 and the lamp body 15, and is particularly built in the slide arm 52 of the arm 14. 61
And the movable rail 62.

An input portion of the inverter lighting device 16 is connected to an electric 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.

The lamp body 15 of the luminaire 4 having the above structure is moved by grasping the handle 76 thereof. In this case, as described above, the lamp 13 is moved 30 ° in the direction of arrow A in FIG. Each of the arms 14 can be horizontally rotated, and can be moved in the front-rear direction through the expansion and contraction of the arm 14 in the direction of arrow B in FIG. Further, the lamp body 15 is moved about 60 degrees with respect to the arm 14 in the direction of arrow C in FIG.
3 and can be rotated in the direction of arrow D in FIG. 3 by about 40 ° as an elevation angle with respect to the arm 14 and about 90 ° as a depression angle with respect to the arm 14. 3 can be rotated by about 90 ° in the direction of arrow E in FIG.

As described above, since the lamp body 15 can be moved in each of the directions indicated by arrows A to E in FIG. 3, the position and posture of the lamp body 15 on the desk can be changed in various ways, and the bolts 57 can be connected as described above. In addition to the horizontal rotation of the arm 14 with respect to the center column 13 and the horizontal rotation of the lamp body 15 with respect to the arm 14 about the vertical axis 82, the lamp body 15 can be largely horizontally rotated. In the movement of the lamp body 15 by such horizontal rotation, the lamp body 1 with respect to the desk top surface is moved.
Since the height position of 5 does not change, the illuminance on the desk does not change.

Then, as described above, the third operation required for the horizontal rotation of the lamp body 15 with respect to the arm 14 on the front side of the first operation force a required for the horizontal rotation of the arm 14 with respect to the support 13.
When the lamp 15 is moved horizontally, the lamp 15 is first moved with respect to the arm 14 and then the arm 14 is moved with respect to the support 13 because the operating force c is weakened. Since the operation order is determined from the hand side to the back side in this way, there is no confusion in the operation of moving the lamp 15 to a desired position, and the lamp 15 can be easily moved as desired by the user, It does not require much power on your wrist.

In the present embodiment, the first to fifth operating forces A to E are set in the relationship of A>B>C>D> E at the time of shipment as described above. The movement of each part is easy to understand and can be easily operated. In particular, the second operation force B required to extend and contract the arm 14 is smaller than the first operation force A (this relationship does not change because there is no adjustment unit).
Therefore, when the slide arm 62 being pulled out is pushed rearward, it is possible to prevent the arm 14 from inadvertently turning horizontally around the support 13 as a fulcrum, so that the arm 14 can be easily contracted. In this respect, the moving operability of the lamp body 15 is also excellent.

[0040]

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 body can be largely moved by the two-stage movement of the movement of the arm with respect to the column and the movement of the lamp body with respect to the arm in the same direction as the movement, and the lamp can be moved relative to the arm. Since the operation force for moving the body is made weaker than the operation force for moving the arm with respect to the support, the operability when moving the lamp body is improved, and it is possible to provide a lighting device that can easily move the lamp body as desired by the user. .

According to the second aspect of the present invention, since the lamp body can be largely moved and the luminaire capable of improving the operability when moving the lamp body is provided, the desk lamp is easy to use and has the same height. A desk with quality lighting equipment can be provided.

[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;

FIG. 5 is a longitudinal sectional side view showing an enlarged part of the lighting fixture of FIG. 2;

FIG. 6 is an exploded perspective view showing a part shown in FIG. 5;

FIG. 7 is a bottom view showing the arm provided in the lighting apparatus of FIG. 2 in a state where the arm is extended.

FIG. 8A is a plan view showing the lighting fixture of FIG. 2 in a state where an arm provided in the lighting apparatus is contracted and an arm housing thereof is removed.
FIG. 3B is a plan view showing the lighting device of FIG. 2 with its arm extended and its arm housing removed.

FIG. 9 is a sectional view showing an arm included in the lighting apparatus of FIG. 2;

FIG. 10 is a sectional view of the joint mechanism shown along the line ZZ in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Learning desk 2 ... Desk main body 2a ... Top plate 4 ... Lighting equipment 13 ... Support 14 ... Arm 15 ... Lamp body 51 ... Arm base 52 ... Slide arm 74 ... Fluorescent lamp 76 ... Handle part 80 ... Joint mechanism 81 ... Hollow shaft 82 vertical shaft 83 vertical joint 84 fitting tube 85 fixing screw 86 horizontal shaft coupling 88 fixing screw 89 bearing hole

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Norimasa Suzuki 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Inside Toshiba Lighting & Technology Corporation (72) Inventor Mii Takahashi 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo No. Toshiba Lighting & Technology Corporation F-term (reference) 3B053 SB02 SB04 SB05 SB06 3K014 AA02 DA05 PA05

Claims (2)

[Claims] 1. A strut, an arm movably connected to the strut so as to be moved by a predetermined operating force, and a ramp, wherein the lamp has an operating force smaller than the predetermined operating force. A lighting unit connected to the tip of the arm so as to be moved in the same direction as the movement direction of the arm. 2. A desk comprising: a desk main body having a top plate; and the lighting fixture according to claim 1, which is disposed on the top plate and illuminates an upper surface of the top plate.