JP5246920B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture that can change an irradiation direction.

Conventionally, there has been proposed a lighting fixture that can change the irradiation direction by changing the direction of the lamp supported by the arm (see, for example, Patent Document 1).
As shown in FIG. 8, a lighting apparatus 100 described in Patent Document 1 is a bed ride provided on a bedside of a hospital or the like, and is attached to a bedside mounting base or the like, and an arm 101 whose angle and orientation can be adjusted. A lamp 103 is attached to the tip of the arm 101 via a joint 102. The joint 102 is rotatable in the X direction and the Y direction, and the rotation of the lamp 103 in the X direction and the Y direction can be arbitrarily rotated by a frictional force generated by a spring provided inside the joint 102. It can be stopped at the position. However, the frictional force in the X direction is set to be large so that the lamp 103 does not swing.
Therefore, when the lamp 103 is rotated in the X direction, the frictional force that restricts the rotation in the X direction by grasping the handle 104 provided in the lamp 103 and pulling the wire 105 in the arrow direction. Rotation is performed with a small size.
Japanese Patent Laid-Open No. 2-197008 (FIG. 1)

  However, in the lighting apparatus 100 described in Patent Document 1 described above, when the lamp 103 is rotated, the wire 105 and the handle 104 are provided to reduce the frictional force that restricts the rotation. There are problems that the number of points is large, the assemblability is poor, and the cost is increased.

  The present invention has been made to solve the conventional problems, and provides a luminaire that can rotate a lamp with a simple structure and can be stopped at an arbitrary angle, and the angle does not change even when used for a long period of time. The purpose is to do.

Lighting device of the invention, a lamp having a light source, a luminaire having an arm for rotatably supported the lamp body by the rotation unit, fixing a rotation of the lamp body and the arm an elastic body which emits a biasing force outwardly in order to generate a frictional force, have a, operating lever to reduce the urging force of the elastic body, wherein the lamp body is secured to a portion of the operating lever The arm has a gate shape having a pair of side plates opposed to each other, and a ring-shaped bearing portion constituting the rotating portion is provided opposite to the lower ends of the pair of side plates. The operating lever includes a pair of operating portions as a gripping portion, a pair of lever members that are continuous to the pair of operating portions, and a part of the pair of lever members project outward in an arc shape. A pair of pad holding portions, and the pair of pad holding portions A pair of pads having an arcuate outer surface is attached to the surface in a state where the arcuate outer surfaces are in contact with each other, and the portions of the pair of pads project from the pair of pad holding portions to the left and right sides Are held by the pair of ring-shaped bearing portions, and the elastic body is provided between the pair of operation portions of the operation lever or between the pair of lever members, and the operation lever In the locked state where the pair of pad holding portions is not operated, the portions projecting to the left and right sides from the pair of pad holding portions are in contact with the inner surfaces of the pair of ring-shaped bearing portions in a state where a first friction force is generated, In the unlocked state in which the pair of operation parts are operated and the pair of operation parts are closer to each other, the portions protruding from the pair of pad holding parts to the left and right sides and the pair of phosphorus Between Jo inner surface of the bearing portion, a second frictional force smaller than the first friction force is generated, has a structure.

  With this configuration, an elastic body is provided in a rotating portion that rotatably supports the lamp body on the arm, and a frictional force that fixes the rotation of the arm and the lamp body by an outward biasing force generated by the elastic body. Therefore, the lamp body can be fixed to the arm at a desired rotation angle. Moreover, since the outward biasing force of the elastic body can be reduced by operating the operation lever inward, the frictional force can be reduced and the lamp can be easily rotated to a desired angle. Furthermore, when the lamp is rotated, the elastic force is reduced by the operation lever, so that the outward biasing force of the elastic body can be set large, and the lamp can be used without loosening even during long-term use. It can be held at a constant rotation angle.

  Moreover, the lighting fixture of this invention has the structure by which the said lamp and the said operation lever were provided integrally.

  With this configuration, since the lamp body and the operation lever are provided integrally, the outward biasing force generated by the elastic body by grasping the operation lever is reduced, and at the same time, the operation lever is rotated to obtain the desired lamp body. It can be rotated to an angle of In addition, the number of parts can be reduced.

  Furthermore, the lighting fixture of the present invention is configured such that the rotating portion rotates between an operation portion provided at a distal end portion of the operation lever and a proximal end portion of the operation lever attached to the lamp body. The moving shaft and the elastic body are provided.

  With this configuration, the base end portion of the operation lever is used as a fulcrum, and the operation portion at the tip is used as a power point. Therefore, the biasing force of the elastic body can be reduced with a small force by the lever principle. In addition, if an elastic body is provided in the vicinity of the operating section, the frictional force of the rotating section can be increased by the lever principle, so that the lamp body can be held at a fixed rotating angle without loosening even during long-term use. can do.

  Furthermore, the lighting fixture of this invention has the structure by which one of a pair of operation part provided in the said operation lever is being fixed to the said lamp body.

  With this configuration, when reducing the urging force of the elastic body, the pair of operation units can be brought closer by grasping the lamp body and the other operation unit, so that the angle adjustment of the lamp unit can be easily performed. .

  According to the present invention, an elastic body is provided in a rotating portion that rotatably supports the lamp body on the arm, and a frictional force that fixes the rotation of the arm and the lamp body by an outward biasing force generated by the elastic body. Therefore, the lamp body can be fixed to the arm at a desired rotation angle. Moreover, since the outward biasing force of the elastic body can be reduced by operating the operation lever inward, the frictional force can be reduced and the lamp can be easily rotated to a desired angle. Furthermore, when the lamp is rotated, the elastic force is reduced by the operation lever, so that the outward biasing force of the elastic body can be set large, and the lamp can be used without loosening even during long-term use. It is possible to provide a lighting apparatus having an effect of being able to be held at a constant rotation angle.

Hereinafter, the lighting fixture of embodiment of this invention is demonstrated using drawing.
1 is a perspective view of a lighting apparatus according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of an arm and an operation lever, FIG. 3A is a cross-sectional view along the operation lever, and FIG. 4A is a cross-sectional view at the position IV-IV in FIG. 3A in the locked state, and FIG. 4B is a cross-sectional view in the unlocked state.

  As shown in FIG. 1, the luminaire 10 according to the first embodiment of the present invention is movable along a lighting rail (not shown) attached to a ceiling 11 or the like, which is an attachment surface, and receives electric power from the lighting rail. A lighting plug 12 to be supplied is provided, and a fixture fixing member 13 is provided vertically downward from the lighting plug 12. An arm 21 is attached below the fixture fixing member 13 and is integrally attached to a rear wall 23a of a lamp body 23 having a lamp 22 that is a light source, and protrudes rearward (rightward in FIG. 1). 31 is attached to the arm 21 so as to be rotatable and rotatable.

  As shown in FIG. 2, the arm 21 has a gate shape having a pair of side plates 21a facing each other, and a ring-shaped bearing portion 21b constituting a part of the rotating portion 30 at the lower end portion of each side plate 21a. Are provided opposite to each other. The circular inner surface 21c of the bearing portion 21b is processed so that the frictional resistance is increased by, for example, roughening.

  As shown in FIG. 2, the operation lever 31 includes a base 31a as a base end portion integrally attached to the rear wall 23a of the lamp body 23, and a pair of lever members 31b and 31b continuous to the base 31a. Have. The width B of the lever member 31b is narrower than the interval B2 between the pair of side plates 21a of the arm 21, and the pair of lever members 31b and 31b is inserted into the base 31a while being inserted between the side plates 21a of the arm 21. On the other hand, it can be opened and closed by elastic deformation. An operation portion 31c that is gripped when the operation lever 31 is operated is provided at the distal end portion of the lever member 31b.

  In addition, it is desirable that the facing operation unit 31c be easily gripped with a wider interval than other portions. Further, the lever member 31b and the pair of bases 31a can be formed separately and connected. Thus, since the operation lever 31 is provided integrally with the lamp body 23, the operation lever 31 can turn the lamp body 23 in the horizontal direction and in the vertical direction.

  A pad holding portion 31d that protrudes outward in an arc shape is provided at the center of each lever member 31b, and a pad 32 is attached to the inner surface of the pad holding portion 31d. The pad 32 preferably has an outer surface 32a having an arc shape, and the inner surface 32b has a size that is substantially the same as the inner surface of the lever member 31b. At least when the pair of lever members 31b approach each other, a space is secured so that the pads 32 do not collide with each other and the lever member 31b cannot be sufficiently approached. In addition, the width B3 of the pad 32 is larger than at least the interval B2 between the side plates 21a of the arm 21, and does not protrude outward from the side plates 21a. The outer surface 32a of the pad 32 is formed with a radius substantially the same as the radius of the inner surface 21c of the bearing portion 21b of the arm 21, and the frictional resistance is increased.

  As shown in FIGS. 3A and 3B, a leaf spring 33 is provided as an elastic body between the pair of operation levers 31. When the operation lever 31 is not operated, the pair of operation levers is provided. 31 are urged away from each other. As a result, as shown in FIG. 4A, the pad 32 attached to the pad attachment portion 31d of the operation lever 31 is biased outward (arrow A in FIGS. 3 and 4), and the lever member 31b The outer surface 32 a of the portion protruding from the left and right sides is pressed against the inner surface 21 c of the bearing portion 21 b of the arm 21. As described above, since the friction coefficient between the outer surface 32a of the pad 32 and the inner surface 21c of the bearing portion 21b is large, a large frictional force is generated and the mutual rotation is prevented and the locked state is obtained.

  On the other hand, when the lamp body 23 is rotated, as shown in FIG. 3B, a direction in which the operation portion 31c at the distal end portion of the operation lever 31 is gripped and approaches each other (arrow B in FIGS. 3 and 4). Move to. As a result, as shown in FIG. 4B, the pad 32 attached to the pad attachment portion 31d of the operation lever 31 moves inward (arrow B in FIGS. 3 and 4), and the outer surface 32a of the pad 32 moves. Since the arm 21 moves away from the inner surface 21c of the bearing portion 21b, the frictional force between the pad 32 and the bearing portion 21b is reduced. Therefore, the pad 32, that is, the operation lever 31 is in an unlocked state that can rotate with respect to the bearing portion 21 b.

  Further, since the pad 32 is attached near the center of the lever member 31b, the base 31a as the base end of the operation lever 31 is used as a fulcrum, and the operation unit 31c as the tip is used as a power point. Thus, the urging force of the leaf spring 33 can be reduced with a small force. If the leaf spring 33 is provided in the vicinity of the operation portion 31c, the frictional force of the rotating portion 30 can be increased by the lever principle, so that the lamp body can be rotated at a constant speed without loosening even during long-term use. Can be held at an angle.

  As described above, according to the luminaire 10 described above, the leaf spring 33 is provided in the rotating portion 30 that rotatably supports the lamp body 23 on the arm 21, and the arm 21 is caused by the outward biasing force generated by the plate spring 33. Since the frictional force that fixes the rotation of the lamp body 23 is generated, the lamp body 23 can be fixed to the arm 21 at a desired rotation angle. Further, since the outward biasing force of the leaf spring 33 can be reduced by operating the operation lever 31 inward, the frictional force is reduced and the lamp body 23 can be easily rotated to a desired angle. Can do. Furthermore, since the elastic force of the leaf spring 33 is reduced by the operation lever 31 when the lamp body 23 is rotated, the outward biasing force of the leaf spring 33 at the time of locking can be set to be large, Even in use, the lamp body 23 can be held at a constant rotation angle without loosening.

Next, a second embodiment will be described.
FIG. 5 is a perspective view of a lighting fixture according to the second embodiment, FIG. 6 is a side view of the lighting fixture, and FIG. 7 is a side view showing another example of a pad mounting portion. In addition, the same code | symbol is attached | subjected to the site | part which is common in 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

As shown in FIG. 5, in the lighting fixture 10 </ b> B according to the second embodiment, one operation portion 34 b of the pair of operation portions 34 a and 34 b provided on the operation lever 34 is fixed to the lamp body 23.
That is, as shown in FIGS. 5 and 6, the operation lever 34 has a pair of lever members 34c and 34d, and one lever member 34d has an internal space, and the other lever is in this internal space. The member 34c can be stored. Here, the operating portion 34 b of the lever member 34 d is attached to the lamp body 23.

  Both lever members 34c and 34d are attached so as to be openable and closable by a shaft 35 provided in the vicinity of the central portion in the longitudinal direction. Are provided with pad attachment portions 34e and 34f, respectively. A pad 32 is attached to each of the pad attachment portions 34e and 34f, and is accommodated inside the bearing portion 21b of the arm 21.

  Accordingly, in the locked state where the operation lever 34 is not operated, the operation portion 34a is separated from the lamp body 23 (that is, the operation portion 34b) by the outward biasing force A of the leaf spring 33, so that the pad mounting portion 34e is disposed on the inner surface of the bearing portion 21b. 21c (arrow B in FIG. 6). Further, the pad mounting portion 34f is in contact with the inner surface 21c of the bearing portion 21b and stopped. Thus, the lamp body 23 is not rotated by the frictional force between the outer surface 32a of the pad 32 and the inner surface 21c of the bearing portion 21b.

  On the other hand, in the unlocked state in which the lamp body 23 is rotated, the operation lever 34 is operated while holding the lamp body 23 to bring the operation portions 34a and 34b closer (arrow C in FIG. 6). As a result, the pad mounting portion 34e moves in a direction away from the inner surface 21c of the bearing portion 21 (arrow D in FIG. 6), so that the frictional force between the outer surface 32a of the pad 32 and the inner surface 21c of the bearing portion 21b is reduced. Thus, the lamp body 23 can be rotated. When the lamp body 23 is turned to a desired angle, the operation lever 34 is released to achieve the above-described locked state, so that the direction of the lamp body 23 can be fixed.

  Note that, as shown in FIG. 7, the pad mounting portion 34f of the lever member 34d fixed to the lamp body 23 has a semicircular (180 °) or more arc, so that the bearing of the arm 21 is also in the unlocked state. It is possible to prevent displacement from the portion 21b. Even in this case, a certain gap is secured between the other pad mounting portion 34e.

  As described above, according to the lighting fixture 10B described above, one of the pair of operation portions 34a and 34b provided on the operation lever 34 is fixed to the lamp body 23, so that the urging force of the leaf spring 33 is reduced. At this time, since the pair of operation parts 34a and 34b can be brought close by grasping the lamp body 23 and the other operation part 34a, the angle adjustment of the lamp body 23 can be easily performed.

In addition, the lighting fixture of this invention is not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
For example, in each of the above-described embodiments, the case where the leaf spring 33 is used as the elastic body that generates the outward biasing force is illustrated, but a spring spring may be used instead of the leaf spring 33.

The perspective view of the lighting fixture concerning 1st Embodiment of this invention. Disassembled perspective view of arm and control lever (A) is a cross-sectional view along the operation lever, (B) is a side view of the rotating portion. (A) is sectional drawing in the position of IV-IV in FIG. 3 (A) in a locked state, (B) is sectional drawing in a lock release state similarly The perspective view of the lighting fixture concerning 2nd Embodiment of this invention. Side view of lighting fixture Side view showing another example of pad mounting part A perspective view of a conventional lighting fixture

Explanation of symbols

10 Lighting equipment 21 Arm 22 Lamp (light source)
23 Lamp 30 Rotating part 31, 34 Operation lever 31a Base (base end part)
31c, 34a Operation part (tip part)
33 Leaf spring (elastic body)
34b Operation unit (one of the tip or operation unit)

Claims (4)

A lighting fixture having a lamp body having a light source and an arm that rotatably supports the lamp body by a rotating portion ,
An elastic body that generates an outward biasing force to generate a frictional force that fixes the rotation of the arm and the lamp body;
Have a, an operating lever to reduce the urging force of the elastic body,
The lamp is fixed to a part of the operation lever,
The arm has a gate shape having a pair of opposing side plates,
At the lower ends of the pair of side plates, a ring-shaped bearing part that constitutes the rotating part is provided to be opposed,
The operating lever includes a pair of operating parts as a gripping part, a pair of lever members that are continuous with the pair of operating parts, and a pair of parts of the pair of lever members protruding outward in an arc shape. A pad holding portion, and
A pair of pads having an arcuate outer surface are attached to the inner surfaces of the pair of pad holding portions in a state where the arcuate outer surfaces are in contact with each other,
The portions of the pair of pads that protrude from the pair of pad holding portions to the left and right sides are held by the pair of ring-shaped bearing portions,
The elastic body is provided between the pair of operation portions in the operation lever or between the pair of lever members,
In the locked state where the operation lever is not operated,
The portions protruding from the pair of pad holding portions on the left and right sides are in contact with the inner surfaces of the pair of ring-shaped bearing portions in a state where a first friction force is generated,
In the unlocked state in which the pair of operation units are operated and the pair of operation units are closer to each other,
A second frictional force smaller than the first frictional force is generated between the portions protruding from the pair of pad holding portions on the left and right sides and the inner surfaces of the pair of ring-shaped bearing portions,
A lighting apparatus characterized by that.   The lighting apparatus according to claim 1, wherein the lamp body and the operation lever are provided integrally.   The rotating shaft of the rotating portion and the elastic body are provided between the operating portion provided at the distal end portion of the operating lever and the base end portion of the operating lever attached to the lamp body. The lighting apparatus according to claim 1, wherein the lighting apparatus is provided. The light fixture according to claim 1, one of the pair of operating portions provided on the operating lever, characterized in that it is fixed to the lamp body.

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