JPH05298911A - Luminaire - Google Patents

Abstract

PURPOSE:To disperse generated stress at a first and a second abutting edges along a plate surface, and preventing damage by applying the abutting edges formed at a support pole base part in different diametric directions to a rotation axis of a support pole to a first and a second stop parts formed protruding in an installation base to be stopped. CONSTITUTION:A lower end of a support pole 14 comprising a front and a back arm parts 21, 22 is freely rotatably supported to an installation base 16 comprising a protective cover 41 and a stop body 42, and an apparatus main body is installed to an upper end of the support pole 14. A first abutting edge 35 which is diagonal and a second abutting edge 36 standing up from the abutting edge 35 are provided. The stop body 42 is provided with a first and a second protruding parts 72, 73 having a first and a second stop parts 71, 72 protruded inward in upper surfaces respectively. These stop parts 71, 72 get in surface contact with the abutting edges 35, 36 when the arm part 22 is almost vertical or inclined forward to stop the arm part 22. Generated stress at the abutting edges can thus be dispersed along a plate surface to prevent damage, thereby the support pole 14 can be stopped surely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a luminaire whose irradiation direction is changed by rotating a column.

[0002]

2. Description of the Related Art As shown in FIGS. 7 and 8, a conventional lighting fixture has a mount 1 mounted on a mounting surface such as a desk (not shown), and a lower end of the mount 1 being rotatable. A lighting fixture main body (not shown) is provided with a column 3 that is pivotally supported by a screw 2, and an abutting portion 4 that projects in the radial direction of the screw 2 that serves as a rotation axis is formed at the lower end of the column 3. ing. In addition, a first locking portion 6a, which projects inwardly to the opposing side wall 5 of the mounting base 1 and which locks the pillar by abutting the upper surface of the contact portion 4 when the pillar 3 is in a substantially vertical standing state, is formed on the lower surface. The first projecting portion 6 having the second projecting portion 7 having the second locking portion 7a for locking the strut 3 by the lower surface of the contact portion 4 contacting when the strut 3 is tilted forward is provided. The formed structure is adopted.

[0003]

However, in the lighting device having the above-described structure, the abutment portion 4 protruding forward of the support column 3 abuts each of the protrusions 6 and 7 to lock the support column 3 and the instrument body. The supporting force concentrates on the contact portion 4, and the stress per unit area becomes very large, and the contact portion 4 bends or
It has a problem that it may break. In particular, for example, a device mounted on a learning desk for school children, in addition to the weight of the support column 3 and the main body of the device, a large inertial force also acts on the base of the abutting portion 4 due to the way of rotating the support column 3 of the school children. The damage of the contact portion 4 has a problem that is noticeable.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting fixture that prevents damage to a portion that restricts rotation.

[0005]

According to the present invention, there is provided a lighting fixture in which a fixture main body is attached to a tip of a column, and a base end of the column is rotatably attached to an attachment base attached to an attached portion. In the above, the support column has a plate-shaped surface on a surface substantially perpendicular to the rotation axis, and has a first end and a second contact edge formed at the base end at different angles in radial directions from the rotation axis. A first and a second locking formed on the mounting base in a radial direction with respect to the rotating shaft at a predetermined angle, and projectingly formed so that the first and second abutting edges are abutted and locked, respectively. And a section.

[0006]

In the lighting apparatus of the present invention, when the support column is rotated, when the support column is rotated to one side and when the support column is rotated to the other side, the base of the support column is connected to the rotation axis of the support column. Since the first and second abutting edges formed in different radial directions are abutted and locked to the first and second locking portions formed to project on the mounting base, the first and second abutting edges are formed. Since the stress generated at the contact edge of 2 is dispersed on the plate-like surface, bending and breaking can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the lighting equipment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 11 is a learning desk for school children, for example, and the learning desk 11 is, for example, a bookshelf 12 and a small shelf in the upper rear part.
13 etc. are attached. The lighting fixture A is attached to the bookshelf 12 as an attached portion. This lighting fixture A, the fixture body 15 is attached to the tip of the support post 14,
As shown in FIG. 3, a mounting base 16 that pivotally supports is attached to the base end of 14.

The instrument main body 15 is composed of a shade 17 which contains, for example, a straight tube type fluorescent lamp, which is not shown, and a hinge portion 18 which is attached to the lower surface of the shade 17 and which is pivotally supported by a column 14 at the rear of the lower surface. The hinge portion 18 has an upper cover 18a made of synthetic resin and a ratchet structure portion 18b in which both longitudinal ends of the shade 17 are horizontally and discontinuously controlled to rotate about the hinge portion 18, and the ratchet structure portion 18b. There are two screw holes 19 at which the upper end of the column 14 is rotatably supported.

As shown in FIG. 1, the column 14 is composed of a front arm portion 21 and a rear arm portion 22, and the front arm portion 21 is
A screw hole 2 that is composed of a front plate portion 23 and a side outer plate portion 24, is formed in a substantially U-shaped cross section with a rear surface opened, and is axially supported at both upper and lower ends.
5, 26 are drilled.

The rear arm portion 22 also comprises a rear plate portion 31 and a side inner plate portion 32, is formed in a substantially U-shaped cross-section with the front surface opened, and is screwed into both upper and lower ends of the screw holes 33, 34. Has been drilled,
An opening side of the rear surface of the front arm portion 21 and an opening side of the front surface of the rear arm portion 22 face each other, and the rear arm portion 22 is formed so as to be included from the opening side of the rear surface of the front arm portion 21.

Further, the rear lower end of the rear arm portion 22 has an acute angle and is formed from a first contact edge 35 formed on the oblique side obliquely upward and upward, and an upper end of the first contact edge 35 of this oblique side. It has a rear plate portion 31 and a second contact edge 36 formed in parallel.

Then, the screw hole 25 at the upper end of the front arm portion 21 is communicated with the screw hole 19 on the front side of the ratchet structure portion 18b of the hinge portion 18 so that the opening side of the rear surface of the front arm portion 21 faces rearward. It is rotatably supported at 37, and the screw hole 33 at the upper end of the rear arm 22 is the screw hole at the rear side of the ratchet structure 18b.
It is connected to 19 and is rotatably supported by a screw 37.

On the other hand, the mount 16 comprises a protective cover 41 made of synthetic resin and a locking body 42 made of metal such as a steel plate.

The protective cover 41 is composed of a front surface portion 43 whose front surface is curved downward and a side surface portion 44, and is formed in a box shape whose lower surface is opened.

Further, the front arm portion of the support column 14 is provided substantially at the center of the upper surface.
An upper half that axially supports the lower end of 21 is formed in a substantially semicircular shape having an axial direction in the width direction, and communicates with the screw hole 26 at the lower end of the front arm portion 21 of the column 14 in the width direction. Further, an adjusting nut 52 with which the adjusting screw 51 is screwed together forms a shaft support portion 54 in which a screw hole 53 for supporting the support column 14 is formed, and further, a rear arm portion of the rear arm portion 22 of the support column 14 is formed on the front surface at the rear portion of the upper surface. A pressing portion 56 having a contact surface 55 with which the rear surface comes into contact is formed above and protrudes in a substantially U-shaped cross section. At the upper end of the side surface part 44, the shaft support
A concave arc-shaped notch concave portion 57 is formed at a position below the screw hole 53 of 54 so that the peripheral surface of the lower end of the front arm portion 21 does not contact.

Further, a reinforcing plate portion 58 is formed on the contact surface 55 of the pressing portion 56 in the horizontal direction from the upper end of the shaft supporting portion 54, and the reinforcing plate portion 58 is formed.
An operation opening 59 into which the lower end of the rear arm portion 22 is inserted is formed between both sides in the longitudinal direction and the side surface portion 44.

On the other hand, the locking body 42 includes a bottom plate portion 61 and the bottom plate portion.
A guide side plate bent substantially vertically from both sides in the longitudinal direction of 61
The upper side of the protective cover 41 is formed so that the lower surface of the protective cover 41 and the lower surface of the bottom plate portion 61 of the locking body 42 are flush with each other. Has been formed.

Further, screw holes 63 are formed in the side surface portions 44 at coaxial positions communicating with the screw holes 53 of the shaft support portion 54 of the protective cover 41, and further below the reinforcing plate portion 58 of the protective cover 41. Communicating with the operation opening 59 that opens to
A screw hole 65 for rotatably supporting the rear arm portion 22 with a screw 64 is provided coaxially with the screw hole 34.

Further, as shown in FIGS. 4 to 6, both side surface portions 44 are formed so as to project inwardly, and the rear arm portion 22 of the post 14 is in a substantially vertical standing state. A first protrusion 72 that forms a first locking portion 71 on the upper surface that comes into surface contact with the first contact edge 35 of the lower hypotenuse, and the lower end front surface of the rear arm portion 22 when the rear arm portion 22 is tilted forward. Second protrusion 74 that forms a second locking portion 73 on the upper surface that is in surface contact with the second contact edge 36 of
And are formed.

Then, as shown in FIG. 4, the first engaging portion
Reference numeral 71 denotes a rear end of the rear arm 22, which is formed by rising rearward at the same angle as the angle A of the lower end of the rear arm 22, which is formed at an acute angle, and the upper end of which is the center of rotation. A straight line in the vertical direction from the center of the formed screw hole 34 and the first contact edge 35 and the second contact edge 35 of the rear arm portion 22 which is the circumference of the turning radius.
Is formed at the intersection of the lower end front side corner of the contact edge 36 with the rotation locus.

Further, the second engaging portion 73 is provided on the rear arm portion 22.
Of the rear arm portion 22 along the tangent line passing through the intersection of the rotation locus of the front angle of the lower end of the lower arm and the straight line from the center of the screw hole 34 of the rear arm portion 22 inclined forward and downward by 30 degrees from the horizontal direction. Hole
Located perpendicular to the straight line from the center of 34 and having a screw hole
The distance from the center of 34 is formed to be substantially the same as the turning radius.

The protective cover 41 and the locking body 42 are screwed together with a flange 76 having a screw hole 75 formed on the inner surface of the protective cover 41 and a screw hole 77 of the locking body 42. It is fixed integrally and attached to a bookshelf 12 as an attached portion by an attaching means (not shown).

Next, the operation of the above embodiment will be described.

The ratchet structure 18b of the hinge portion 18 of the instrument body 15 and the bookshelf 12 as an attached portion by an attaching means (not shown) so that the irradiation from the instrument body 15 can be obtained at a desired irradiation angle. A column (14) in a substantially vertical standing state whose base end is axially supported by an attached mount (16) is rotated about the base end to move and adjust the front-back position of the instrument body (15).
At this time, as shown in FIG.
The rear plate portion 31 of the rear arm portion 22 abuts on the contact portion 55 of the protective cover 41 of the mounting base 16 and the first abutting edge of the rear arm portion 22.
35 is the first of the upper surface of the first protrusion 72 of the locking body 42 of the mounting base 16.
Is in surface contact with the locking portion 71 of.

In moving the instrument body 15,
When the support column 14 is rotated to the forward tilted state shown in FIG. 3, when the support column 14 is tilted forward to the frontmost tilt position where the support column is tilted 30 degrees forward, as shown in FIG. The second abutting edge 36 of the portion 22 makes surface contact with the second engaging portion 73 on the upper surface of the second protruding portion 74 of the engaging body 42 to engage the strut 14, and thus the instrument body 15 to the strut.
According to the above-described embodiment supported by 14, the first support portion 71 having the first engaging portion 71 with which the first contact edge 35 formed on the lower surface of the support pillar 14 comes into surface contact when the support pillar 14 is in a substantially vertical standing state. 1 protrusion 72,
A second protrusion 74 having a second engaging portion 73 with which the second contact edge 36 of the rear arm portion 22 of the column 14 comes into surface contact when the column 14 is in the frontmost tilted state, and the instrument main body 15 is at the upper end. By providing the attached support column 14 on the locking body 42 of the mounting base 16 that pivotally supports the support column 14, the support column 14 can be reliably and stably locked. Then, even if the pillar 14 is repeatedly rotated to move the position of the instrument main body 15, the pillar 14 is not locked by the protrusion having a small cross-sectional area formed in the pillar having the conventional configuration, and the pillar 14 is not locked. In the rear arm portion 22 itself which is configured, the column 14 is the locking portion of each protrusion 72, 74.
Since it is supported by 71, 73, it is possible to prevent damage to the first contact edge 35 and the second contact edge 36 that lock the column 14. In addition, even when it is attached to a school desk for school children whose rotation operation is intense, even if a large inertial force is generated during the rotation operation, the first and second inner plate portions 32 formed on the side inner plate portion 32 Abutment edge 3
Even if stress is generated in 5, 36, the stress is dispersed on the surface, so it is possible to prevent the stress from concentrating as in the conventional configuration, and prevent damage such as bending and breakage, and to ensure a reliable relationship. Can be stopped.

In the above embodiment, the foremost tilt position of the support column 14 is set to the position where the support column 14 is tilted forward by 30 degrees, but the forward tilt angle of the support column 14 depends on the second engagement of the locking body 42. It can be freely set by forming the stop portion 73 or by forming the second contact edge 36 of the rear arm portion 22 in an inclined manner.

Further, the ratchet structure 18b is provided on the hinge portion 18 of the instrument main body 15 to control the instrument main body 15 to rotate non-continuously, but other rotating means may be provided.

[0029]

According to the luminaire of the present invention, when the support pillar is rotated, when the support pillar is rotated to one side and when the support pillar is rotated to the other side, the support base is rotated at the base of the support pillar. Since the first and second abutting edges formed in different radial directions from the moving shaft are abutted and locked to the first and second locking portions formed to project on the mounting base, Since the stress generated at the first and second contact edges is dispersed on the plate-shaped surface, damage such as bending and breaking can be prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an enlarged main part showing an embodiment of a lighting fixture of the present invention.

FIG. 2 is a longitudinal sectional view of the same.

FIG. 3 is a side view of the above.

FIG. 4 is an enlarged side view of the main part of the above.

FIG. 5 is a partially cutaway side view showing an enlarged main part of the above-mentioned support column in a vertical standing state.

FIG. 6 is a partially cutaway side view showing an enlarged main part of the above-mentioned support column in a frontmost tilted state.

FIG. 7 is an exploded perspective view showing an enlarged main part of an example of a conventional lighting fixture.

FIG. 8 is an explanatory diagram showing a locking state of a column of an example of a conventional lighting fixture.

[Explanation of symbols]

 14 Strut 16 Mounting base 35 First abutting edge 36 Second abutting edge 71 First locking portion 72 First protruding portion 73 Second locking portion 74 Second protruding portion

Claims (1)

[Claims] 1. An instrument main body is attached to the tip of a column,
In a lighting fixture in which a base end of the support column is rotatably attached to a mounting base attached to an attached portion, the support column has a plate-shaped surface on a surface substantially perpendicular to a rotation axis,
The first formed at the base end at different angles in the radial direction from the rotating shaft
The second contact edge and the mounting base are formed at a predetermined angle in a radial direction with respect to the rotating shaft, and the first and second contact edges are formed so as to be engaged and locked with each other. A lighting fixture comprising: a first and a second locking portion.