JP3800480B2 - lighting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting fixture, for example, a lighting fixture used by being mounted on furniture such as a desk.
[0002]
[Prior art]
As a lighting device for a desk, there is known a lighting device provided with an arm that refracts from the upper end of a support fixed to the desk and extends in the horizontal direction, and a lighting body is attached to the tip of the arm. Usually, in order to change the irradiation direction of the light that illuminates the top of the desk, the illuminating body includes a turning direction X about the vertical axis that intersects the arm axis and a swing direction Y about the horizontal axis that intersects the arm axis. The posture can be freely changed.
[0003]
[Problems to be solved by the invention]
In the prior art, a vertical axis that defines the turning direction X and a horizontal axis that defines the swing direction Y are both formed by shaft members, and the rotation in the swing direction X and the swing direction Y is performed independently. Since it is a structure, when changing the attitude | position of a lighting body, it receives restrictions with the attitude | position which can be selected.
[0004]
Therefore, in order to diversify the posture change of the illuminating body, in addition to the vertical axis and the horizontal axis, a shaft member that can change the posture in the torsional direction Z around the extension axis of the arm axis is added. It is found to be good. However, in this case, three shaft members must be interposed between the arm and the illuminating body, resulting in an increase in the number of parts and an increase in the size of the apparatus. In addition, the diversified turning direction X, swinging direction Y, and torsional direction Z are rotated independently by the three shaft members, so that the posture can be changed smoothly and flexibly. There is a problem that it is difficult.
[0005]
[Means for Solving the Problems]
The present invention provides a lighting fixture that can flexibly and freely change the posture of an illuminating body by providing a ball joint, and solves various newly discovered problems by adopting the ball joint. It is.
[0006]
Therefore, the present invention is configured as a means that an illuminating body is provided at the tip of the arm, a turning direction X about the vertical axis intersecting the arm axis, a swinging direction Y about the horizontal axis intersecting the arm axis, and the arm A lighting device that is mounted in such a manner that its posture can be freely changed with respect to a torsional direction Z around an extension axis of an axis, and a ball means provided with a ball portion on a support shaft attached to an arm, and a socket for holding the ball portion And intermediate means having a shaft portion extending laterally from the socket portion, and bearing means provided on the illuminating body and pivotally supporting the shaft portion, the socket portion of the intermediate means and the ball portion of the ball means A ball joint that allows the attitude of the illuminator to change in the turning direction X and the twist direction Z is configured, and the attitude of the illuminator in the swing direction Y can be changed by the shaft portion and the bearing means of the intermediate means. Lies in comprising constituting the oscillating rotation means that.
[0007]
In carrying out the above-described configuration, it is preferable that the intermediate unit is provided with an engaging unit that integrally engages the ball unit in the swing direction Y.
[0008]
Moreover, it is preferable to provide a stopper means for restricting the rotation range of the intermediate means in the twisting direction Z between the ball means and the intermediate means.
[0009]
Moreover, it is preferable to provide a pressure adjusting means that includes a fixed bearing portion that holds the shaft portion of the intermediate means and a movable bearing portion, and presses the movable bearing portion against the peripheral surface of the shaft portion in an adjustable manner.
[0010]
Further, the present invention is configured as a means, an illuminating body at the tip of the arm, a turning direction X about the vertical axis intersecting the arm axis, a swinging direction Y about the horizontal axis intersecting the arm axis, and the arm A lighting device that is mounted so as to be freely changeable in the torsional direction Z around the axis extension axis, comprising a ball means provided with a ball portion on a support shaft fixed to an arm, and a pair of halves And an intermediate means provided with a socket piece portion that is held by sandwiching the ball portion with a pair of spherical concave portions, and a shaft piece portion that extends laterally from the socket piece portion. Bearing means provided on the body and supporting the shaft portion, and the socket piece of one of the divided members of the intermediate means is externally inserted into the support shaft in a state where the support shaft of the ball means is inserted. A control hole for inserting a cylindrical shaft The control hole constitutes a long hole extending sideways so as to allow the rotation of the intermediate means in the turning direction X, while the upper and lower edges are formed so as to prevent the rotation of the intermediate means in the swinging direction Y. Engaging means is configured by engaging with a cylindrical shaft, and swinging rotating means that enables the attitude of the illuminator to change the swinging direction Y is configured by the shaft portion of the intermediate means and the bearing means. It is in the point.
[0011]
In carrying out the above-described configuration, it is preferable that the cylindrical shaft be rotatable integrally with the intermediate means on the support shaft of the ball means with respect to the twisting direction Z, and so as to surround the cylindrical shaft and the cylindrical shaft. It is preferable to provide a stopper means for limiting the rotation range of the cylindrical shaft that is rotated integrally with the intermediate means between the annular wall portion provided on the arm.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
FIG. 1 shows an example of a desk 2 equipped with a lighting fixture 1 of the present invention. On the top plate 3 of the desk 2, a lower book shelf 4 and an upper book shelf 5 are detachably stacked, and as shown in FIG. 2, the back plate 4a of the lower book shelf 4 and the back plate 5a of the upper book shelf 5 are connected to each other. It is biased back and forth. That is, the back plate 4a of the lower bookcase 4 is positioned at the front position with respect to the front-rear direction of the desk 2, and the back plate 5a of the upper bookcase 5 is positioned at the rear position, and the rear surface of the back plate 4a and the back plate 5a A distance d as shown in the figure. Further, the shelf board 5b of the upper bookcase 5 is disposed above the upper end of the back board 4a of the lower bookcase 4, and has a sufficient distance D as shown in the figure. The upper bookcase 5 is detachable from the lower bookcase 4, and the lower bookcase 4 is detachable from the top 3.
[0014]
The lighting fixture 1 includes a support column 6, an arm 7 that is refracted from the upper end of the support column and extends in a substantially horizontal direction, and an illuminating body 8 connected to the tip of the arm 7. In order to have it, the following mounting modes are selectively possible.
[0015]
In the first mounting form shown in FIG. 2, a lower bookcase 4 and an upper bookcase 5 are stacked on the desk 2, and the column 6 of the lighting device 1 is fixed to the back surface of the back plate 4 a of the lower bookcase 4. It is done. As described above, the back plates 5 a and 4 a positioned above and below have a distance d in the front-rear direction, so that the upper portion of the column 6 protrudes to the front side of the back plate 5 a of the upper bookcase 5. As described above, since the shelf 5b of the upper bookcase 5 is located above with a sufficient distance D, the arm 7 is disposed in the lower space of the shelf 5b, and the illuminating body 8 is attached to the top 3 It is arranged at a position where light can be irradiated. As shown in FIG. 5A, which will be described later, the support column 6 is provided with mounting holes 9a, 9b penetrating in two places at intervals in the vertical direction in the vicinity of the lower end, and the back surface of the back plate 4a of the lower bookcase 4 Are provided with embedded nuts 10a and 10b at two locations in the vicinity of the lower end in the vertical direction, and the selected mounting hole 9a or 9b and the selected embedded nut 10a or 10b are matched with each other. In this state, the headed bolt 11 inserted through the mounting hole is configured to be screwed into the embedded nut, and the vertical mounting position of the column 6 can be changed by such selection. Therefore, in the first mounting form shown in FIG. 2, the head bolt 11 is fastened with the lower mounting hole 9b aligned with the lower embedded nut 10b, and therefore the column 6 can be changed. It is attached to the lowest position among the vertical mounting positions.
[0016]
In the second mounting form shown in FIG. 3, the upper bookcase 5 is removed from the lower bookcase 4. Therefore, the lighting fixture 1 has the upper part of the column 6 extended upward from the back plate 4a of the lower bookcase 4, and the arm 7 and the illuminating body 8 are arranged in a free space. Therefore, the mounting position of the column 6 with respect to the back plate 4a can be changed by selecting the mounting holes 9a, 9b and the embedded nuts 10a, 10b as described above. That is, in addition to the lowest position shown in FIG. 2, the head bolt 11 is fastened with the upper mounting hole 9a aligned with the upper embedded nut 10a as shown in FIGS. 3 and 5A. By doing so, an intermediate position in which the support column 6 is positioned slightly above the lowermost position is possible, and although not shown, the lower mounting hole 9b is made to match the upper embedded nut 10a. By tightening the headed bolt 11 in this state, the uppermost position where the column 6 is positioned further above the intermediate position is possible.
[0017]
In the third mounting form shown in FIG. 4, all the bookshelves are removed from the top plate 3 of the desk 2. In this case, the column 6 of the lighting fixture 1 is attached to the top plate 3 by using the fixture 12. As shown in FIGS. 5B and 7B, the fixture 12 is configured such that the edge of the top plate 3 is clamped by a U-shaped clamp fitting 14 having a fastening bolt 13. 14, with the bracket 15 having a U-shaped cross section rising from 14, the pair of headed bolts 11, 11 inserted into the pair of mounting holes 9 a, 9 b are attached to the bracket 15. The nut 16 and 16 are fastened together with being inserted. A cover member 17 that covers the bracket 15 including the bolts and nuts is provided.
[0018]
As shown in FIG. 6 and FIG. 7 (A), the column 6 of the luminaire 1 is made of an extruded material or a drawing material made of a light metal or other material such as aluminum, and preferably constitutes a hollow column material. The formed rectangular tube portion 18 having a square cross section extends in the longitudinal direction, and substantially cylindrical ribs 19 and 19 extending in the longitudinal direction along the inner surfaces of the left and right side walls are formed. A groove 20 is formed along the longitudinal direction. Therefore, as shown in FIG. 5A, the lower end opening of the support column 6 is closed by the lid member 21, and screws 22 and 22 for fixing the lid member 21 are screwed and fixed to the ribs 19 and 19.
[0019]
In order to stabilize the mounting state of the column 6 in the first and second mounting forms shown in FIGS. 2 and 3, a fixing band 23 for holding the column 6 is provided on the back surface of the back plate 4 a in the lower bookcase 4. The headed bolts 24, 24 inserted into the mounting holes at both ends of the fixed band 23 are screwed into the embedded nuts 25, 25 provided on the back surface of the back plate 4a. . Therefore, in the first and second mounting forms, the fixing band 23 is tightened by the headed bolts 24, 24, and the column 6 is fastened between the back plate 4 a and the fixing band 23. On the other hand, by loosening or removing the head bolts 24, 24, it is possible to change the vertical mounting position of the support column 6 as described above, and it is possible to remove the lower bookcase 4 as shown in FIG. is there.
[0020]
As shown in FIG. 8, the arm 7 of the lighting fixture 1 constitutes an extendable arm in which an inner arm 27 is slidably fitted to an outer arm 26 made of synthetic resin. As shown in FIG. 9 and FIG. 10, the outer arm 26 forms a hollow body by connecting both side edges with screws or the like in a state where the upper body 26a and the lower body 26b divided in the vertical direction are overlapped. And the jaw part 28 is integrally formed in the tail end part of the lower body 26b. As shown in FIG. 10, the jaw portion 28 has an angular shaft portion 29 having a rectangular cross section extending from the bottom wall 28 a, and a metal reinforcing core 30 is inserted into the angular shaft portion 29. Therefore, the angular shaft portion 29 is inserted into the rectangular tube portion 18 from the upper end of the support column 6, the upper end opening of the support column 6 is closed by the bottom wall 28a of the jaw portion 28, and screws 31, 31 for fixing the bottom wall 28a are provided. The ribs 19 and 19 of the column 6 are screwed and fixed.
[0021]
As shown in FIGS. 8 and 9, the inner arm 27 forms a hollow body by closing the upper opening of the dish body 27a with a lid body 27b and connecting with a screw or the like, and in the vicinity of the tail end of the dish body 27a. Slide guides 32, 32 having a U-shaped cross section are provided on the outside of both side walls. Slide grooves 33, 33 are formed on the inner surfaces of both sides of the outer arm 26 constituting the hollow body, and the slide grooves 33, 33 are closed by a closing wall 33a at the tip of the outer arm 26. Therefore, the inner arm 27 slidably fits the slide guides 32 and 32 into the slide grooves 33 and 33 while being inserted into the outer arm 26 in a nested manner. As shown in FIG. 8, when the inner arm 27 is pushed into the outer arm 26, the rear end portion of the inner arm 27 contacts the rear end wall of the outer arm 26. When the inner arm 27 is pulled out from this state, the slide guides 32, 32 slide along the slide grooves 33, 33 together with the inner arm 27, and the front ends of the slide guides 32, 32 are in contact with the closing walls 33a, 33a. Stop at.
[0022]
As shown in FIG. 2 to FIG. 4 and FIG. 8 and FIG. 12, the illuminator 8 includes a bowl-shaped shade 34 that extends in the lateral direction and opens downward, and the shade 34 is formed of a straight tube type or other fluorescent lamp. A light source body 35 and a lighting device (not shown) are provided, and a reflection plate 36 extending along the upper side of the light source body 35 is provided. As shown in FIG. 12, a transparent or translucent display plate 37 is fitted through a window hole at a central portion in the longitudinal direction of the shade 34, and the light from the light source body 35 is transmitted through the through hole of the reflection plate 36. It passes through and is made transparent on the display board 37, and marks such as characters or symbols displayed on the display board 37 are clearly displayed. A fogging plate 38 made of a synthetic resin plate such as milky white is provided on the inner side of the heel edge 34a of the shade 34 in order to reduce light transmission. The fogging plate 38 is fixed to a front edge of the reflection plate 36 by a fixing means 39 such as a screw, and a mounting rib 38b integrally projecting inward from the upper portion of the skirt portion 38a extending over the entire length in the longitudinal direction of the heel edge. The attachment pieces 38c bent inward from both longitudinal ends of the skirt portion 38a are fixed to the inner sides of both side walls of the shade 34. Further, a shielding portion 38 d that shields between the skirt portion 38 a and the inner surface of the shade 34 is integrally projected from the skirt portion 38 a at the central portion in the longitudinal direction of the cloud plate 38. Therefore, among the illumination light emitted from the light source body 35, the light emitted toward the lower side of the collar 34a is relaxed and anti-glare by the skirt portion 38a of the cloud plate 38, so that it is directed to the desk user's face. Is prevented from direct irradiation. On the other hand, since the light irradiated to the display board 37 is prevented from being directly leaked to the outside by the shielding part 38d, it contributes to the manifestation of the mark displayed on the display board 37. Moreover, when the posture of the illuminating body 8 is changed by gripping the collar 34a of the shade 34 with fingers, the shielding portion 38d is useful as a finger contact.
[0023]
As shown in FIG. 15, the illuminating body 8 has a turning direction X about a vertical axis V intersecting the axis A of the arm 7 that can be extended and retracted with respect to the tip of the arm 7 (tip of the inner arm 27), and the axis. It is attached so that its posture can be freely changed with respect to a swinging direction Y around the horizontal axis H intersecting A and a twisting direction Z around the extension axis E of the axis A. The posture change between the turning direction X and the twisting direction Z is achieved by a ball joint as described later. For this reason, the vertical axis V that defines the turning direction X is not limited to one vertical axis, but is inclined between the vertical axis (V in the figure) and the horizontal axis H through the center of the ball. It should be appreciated that it includes innumerable vertical axes. Further, the extension axis E that defines the torsional direction Z is not limited to the same axis extending on the same line as the arm axis A, and is inclined between the center of the ball (E in the drawing) and the horizontal axis H. It should be appreciated that it includes innumerable vertical axes.
[0024]
As shown in FIGS. 11 and 12, between the arm 7 and the illuminating body 8, a ball means 42 having a ball portion 41 on a support shaft 40, a socket portion 43 for holding the ball portion 41, and the socket. An intermediate means 45 having shaft portions 44, 44 extending on both sides from the portion is disposed.
[0025]
The ball means 42 inserts the support shaft 40 into a cylindrical portion 46 formed at the tip of the inner arm 27 and is fixed in a retaining shape by a pin or the like, and is fixed in a non-rotatable manner in the illustrated example. Project from the inner arm 27. At this time, the cylindrical shaft 47 is extrapolated to the neck portion of the support shaft 40, and the cylindrical shaft 47 is rotatably fitted in a large-diameter annular wall portion 48 whose diameter is increased in the vicinity of the opening of the cylindrical portion 46. Yes.
[0026]
The intermediate means 45 is configured by coupling a pair of half-divided divided bodies 45a and 45b into a palm-splitting state. That is, by connecting and fastening the divided bodies 45a and 45b with the connecting means 49 such as bolts and nuts, the pair of socket pieces 43a and 43b each having a spherical recess that is sandwiched and held between the ball parts 41 is described above. The socket portion 43 is configured, and the shaft portion 44 is configured by a pair of shaft piece portions 44a and 44b extending from the socket piece portions 43a and 43b. In addition, if it is set as the structure which fastens | tightens a pair of socket piece part 43a, 43b by the coupling means 49 which consists of a volt | bolt and a nut, the frictional resistance between the socket part 43 and the ball | bowl part 41 can be adjusted, It is possible to set the stiffness of the movement when the posture of the illuminating body 8 is changed with respect to the turning direction X and the twisting direction Z to be optimum.
[0027]
The shaft portions 44, 44 of the intermediate means 45 are pivotally supported by bearing means 50, 50 provided on the illuminating body 8. In the case of the illustrated example, the bearing means 50 is configured by making the substantially semicircular cutouts formed in the rib wall 34c of the shade 34 and the lower cover 34b face each other. A pressure adjusting means 53 is provided in the vicinity of one of the bearing means 50. As shown in FIG. 13, the pressure adjusting means 53 includes a fixed bearing portion 51 and a movable bearing portion 52 that are arranged to face each other, and is a shade. The shaft portion 44 of the intermediate means 45 is held between a fixed bearing portion 51 provided on the 34 side and a movable bearing portion 52 attached so as to face the fixed bearing portion 51. The movable bearing portion 52 is composed of a leaf spring in which a concave bent portion 52c that holds the shaft portion 44 between the wing portions 52a and 52b is bent, and one wing portion 52a is fixed to the fixed bearing portion 51 with a pin or the like. On the other hand, the operating means 55 is provided on the other wing 52b. In the case of the illustrated example, the operating means 55 includes a screw shaft 54 that protrudes from the fixed bearing portion 52 and penetrates the wing portion 52b, and a fastening portion 55a that engages with the screw shaft 54 and a knob portion 55b. The knob 55b protrudes from the lower cover 34b of the shade 34. Therefore, when the fastening portion 55a is advanced with respect to the screw shaft 54 by rotating the knob portion 55b, the wing portion 52b is tensioned, and the peripheral surface of the shaft portion 44 is tightened by the concave curved portion 52c. On the other hand, when the fastening portion 55a is retracted on the screw shaft 54, the wing portion 52b is moved backward by the restoring force of the leaf spring, and the tightening force of the concave curved portion 52c is relaxed on the peripheral surface of the shaft portion 44. . Therefore, the pressure adjusting means 53 not only prevents the lighting body 8 from hanging down in the swing direction Y due to its own weight, but also allows the movement of the lighting body 8 when the user changes the posture of the lighting body 8 with respect to the swing direction Y. Can be set for optimal stiffness.
[0028]
As apparent from the above, a ball joint is formed between the arm 7 and the illuminating body 8 by the socket portion 43 of the intermediate means 45 and the ball portion 41 of the ball means 42. Therefore, due to the freedom of the ball joint, the illuminating body 8 can be changed in posture in the swiveling direction X, the swinging direction Y, and the twisting direction Z in the respective directions and in the direction in which they are combined. The embodiment may be configured as such.
[0029]
However, in the illustrated embodiment, only the posture change with respect to the turning direction X and the torsional direction Z is made possible by the ball joint, and the posture change with respect to the swinging direction Y is a pivot type comprising the shaft portion 44 and the bearing means 50. The configuration is made possible by swinging and rotating means.
[0030]
As shown in FIG. 11, the socket piece 43b of one divided body 45b of the intermediate means 45 has a control hole 56 through which the cylindrical shaft 47 inserted on the neck of the support shaft 40 of the ball means 42 is inserted. Yes. Therefore, the control hole 56 is formed as a long hole extending in the lateral direction, so that the intermediate means 45 can be rotated in the turning direction X.
[0031]
However, as shown in FIG. 12, the control hole 56 constitutes the engaging means 57 in which the upper and lower edges are engaged with the cylindrical shaft 47 so as to prevent the rotation of the intermediate means 45 in the swing direction Y. In the case of the illustrated example, a flat shaft portion 47 a obtained by cutting the upper and lower portions of the cylindrical shaft 47 is fitted into the control hole 56. Therefore, according to the configuration of the illustrated embodiment, the lighting body 8 does not hang down in the swinging direction Y due to its own weight at the ball joint portion, and the posture change of the lighting body 8 with respect to the swinging direction Y can be performed on both sides of the ball joint. This is achieved by a pivot type swinging and pivoting means comprising a shaft portion 44 and a bearing means 50 provided on the side.
[0032]
A conducting wire for supplying a current to the light source body 35 of the illuminating body 8 is guided from the illuminating body 8 through the hollow portion of the arm 7 to the groove 20 of the column 6 and guided to the floor surface. For this reason, if the illuminating body 8 is freely rotatable in the torsional direction Z by the ball joint, the lead wire is twisted between the illuminating body 8 and the arm 7, and there is a risk of disconnection. Therefore, a stopper means 58 is provided between the ball means 42 and the intermediate means 45 to limit the rotation range of the intermediate means 45 in the twisting direction Z. In the case of the illustrated embodiment, as shown in FIGS. 12 and 14, a projecting piece 59 is provided on the outer peripheral surface of the cylindrical shaft 47, and the inner periphery of the large-diameter annular wall portion 48 that rotatably receives the cylindrical shaft 47. Receiving pieces 60a and 60b are provided on the surface at intervals in the circumferential direction. In the case of the illustrated example, when the intermediate means 45 is in a substantially horizontal posture, the protruding piece 59 is in an upward posture as shown in FIG. 14, and a pair of receiving pieces 60 a and 60 b are on the left and right sides of the protruding piece 59. Are arranged at intervals. Accordingly, when the intermediate means 45 is rotated in the clockwise direction from this state, the protruding piece 59 of the cylindrical shaft 47 that rotates integrally with the intermediate means 45 by the engaging means 57 contacts the right receiving piece 60b. As a result, the rotation of the intermediate means 45 in the clockwise direction is stopped. On the contrary, when the intermediate means 45 is rotated in the counterclockwise direction, the projecting piece 59 of the cylindrical shaft 47 that rotates integrally with the intermediate means 45 is brought into contact with the left receiving piece 60a by the engaging means 57. As a result, the rotation of the intermediate means 45 in the counterclockwise direction is stopped.
[0033]
【The invention's effect】
According to the present invention, the ball means 42 provided with the ball portion 41 on the support shaft 40 attached to the arm 7, the socket portion 43 for holding the ball portion 41, and the shaft portion extending laterally from the socket portion 43. Since the intermediate means 45 having 44 and 44 and the bearing means 50 and 50 provided on the illuminating body 8 and supporting the shaft portions 44 and 44 are provided, the socket portion 43 of the intermediate means 45 The ball portion 41 of the ball means 42 constitutes a ball joint that changes the posture of the illuminating body 8 in at least the turning direction X and the twisting direction Z. Therefore, according to such a ball joint, the vertical axis V that defines the turning direction X is not limited to one vertical axis, and passes through the center of the ball, and the vertical axis (V in FIG. 15) and the horizontal axis H. 15 and the extension axis E that defines the torsional direction Z is not limited to the same axis extending along the same axis as the arm axis A, but passes through the center of the ball and is coaxial (see E in FIG. 15). ) And the horizontal axis H include innumerable vertical axes, so that the lighting body 8 can be flexibly and freely changed in posture.
[0034]
Further, since the pivoting means as described above is constituted by the shaft portions 44, 44 of the intermediate means 45 and the bearing means 50, 50 of the illuminating body 8, the posture change of the illuminating body 8 with respect to the swinging direction Y is changed. Can be done smoothly. At this time, since the illuminating body 8 is configured by the shaft portion and the bearing, it is possible to form a wide rotation range. For example, the illuminating body 8 is rotated from the position of the solid line shown in FIG. In addition to being able to move, it can be configured to be rotatable from the position of the chain line to a position that substantially overlaps the lower side of the arm 7, so that the arm 7 and the lighting body 8 can be made compact when packed in an assembled state. .
[0035]
By the way, while the ball joint allows the posture change in the turning direction X and the torsional direction Z, the role is divided so that the posture change in the swing direction Y can be made possible by the swinging rotation means by the shaft portion and the bearing. In this case, it is preferable to provide an engagement means 57 for integrally engaging the intermediate means 45 with the ball means 42 in the swing direction Y. Therefore, when the ball joint having such a configuration is put into practice, the intermediate means 45 is preferably configured by a pair of half-divided divided bodies 45a and 45b, and the divided bodies 45a and 45b are joined in a palm-armed state. Thus, the ball portion 41 is sandwiched and held by the spherical concave portions of the socket piece portions 43a and 43b, and the shaft portions 44 and 44 are formed by the shaft piece portions 44a and 44b extending laterally from the socket piece portion. By doing so, implementation becomes easy. Therefore, a control hole 56 through which the support shaft 40 and the cylindrical shaft 47 of the ball means are inserted is opened in the socket piece portion 43b of one divided body 45b, and the control hole 56 is allowed to turn in the turning direction X of the intermediate means 45. The engaging means 57 can be easily configured by inserting the cylindrical shaft 47 of the support shaft 40 into the control hole 56 while forming the horizontally long slot.
[0036]
Further, in order to prevent the lead wire from being twisted and disconnected between the arm 7 and the illuminating body 8, the rotation range of the intermediate means 45 in the twisting direction Z is limited between the ball means 42 and the intermediate means 45. It is preferable to provide a stopper means 58. Such a stopper means 58 includes a cylindrical shaft 47 that is rotated together with the intermediate means 45 via the engaging means 57, and an arm 7 that surrounds the cylindrical shaft 47. By providing contact means such as the projecting piece 59 and the receiving pieces 60a and 60b between the annular wall portion 48, it is possible to easily carry out.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a desk equipped with a lighting apparatus of the present invention.
FIG. 2 is a longitudinal side view showing a first mounting form when the lighting fixture of the present invention is mounted on a desk.
FIG. 3 is a longitudinal side view showing a second mounting form when the lighting fixture of the present invention is mounted on a desk.
FIG. 4 is a longitudinal side view showing a third mounting configuration when the lighting fixture of the present invention is mounted on a desk.
5A and 5B show a mounting portion of a lighting fixture with respect to a desk, where FIG. 5A is an enlarged view of a portion A in FIG. 3, and FIG. 5B is an enlarged view of a portion B in FIG.
FIG. 6 is a rear view of the luminaire showing a mounting portion of the luminaire with respect to the bookshelf of the desk, with the back plate of the bookshelf cut away.
7A and 7B show a column of a lighting fixture, in which FIG. 7A is an enlarged sectional view taken along line CC in FIG. 6, and FIG. 7B is an enlarged sectional view taken along line DD in FIG.
FIG. 8 is a cross-sectional view showing a connecting portion between an arm and an illuminating body in the lighting fixture of one embodiment of the present invention.
9 is an enlarged cross-sectional view taken along line EE of FIG.
10 is an enlarged sectional view taken along line FF in FIG. 8. FIG.
FIG. 11 is an enlarged cross-sectional view showing one embodiment of the ball joint and the swinging rotation means.
12 is an enlarged sectional view taken along line JJ of FIG.
13 is an enlarged sectional view taken along line GG in FIG.
14 is an enlarged sectional view taken along line HH in FIG.
FIG. 15 is a perspective view illustrating a turning direction X, a swinging direction Y, and a twisting direction Z of an illuminating body in a lighting fixture.
[Explanation of symbols]
1 lighting equipment
2 Desk
4 Lower bookcase
5 Upper bookcase
6 props
7 Arm
8 Illuminator
26 Outer arm
27 Inner arm
34 Shade
35 Light source
40 spindle
41 Ball part
42 Ball means
43 Socket part
43a, 43b Socket part
44 Shaft
44a, 44b Shaft piece
45 Intermediate means
45a, 45b Divided bodies
46 Tube
47 Tube shaft
48 Annular wall
49 Coupling means
50 Bearing means
51 Fixed bearing
52 Movable bearing
53 Pressure regulating means
56 Control hole
57 engaging means
58 Stopper means

Claims (6)

An illuminating body at the tip of the arm, with respect to a turning direction X about the vertical axis intersecting the arm axis, a swinging direction Y about the horizontal axis intersecting the arm axis, and a twisting direction Z about the extension axis of the arm axis It is a lighting fixture that can be freely changed in posture,
A ball means provided with a ball portion on a support shaft attached to an arm; a socket portion for holding the ball portion; an intermediate means having a shaft portion extending laterally from the socket portion; Bearing means for supporting the shaft portion,
The socket portion of the intermediate means and the ball portion of the ball means constitute a ball joint that allows the posture of the illuminator to be changed in the turning direction X and the torsional direction Z, and the shaft portion of the intermediate means and the bearing means An illuminator characterized in that it comprises swinging rotation means that enables posture change with respect to the swinging direction Y. 2. The lighting apparatus according to claim 1, further comprising engaging means for integrally engaging the intermediate means with the ball means in the swing direction Y. The lighting apparatus according to claim 1 or 2, wherein stopper means for limiting a rotation range of the intermediate means in the twisting direction Z is provided between the ball means and the intermediate means. 2. A pressure adjusting means comprising a fixed bearing portion and a movable bearing portion for holding the shaft portion of the intermediate means, and pressure-adjusting means for pressing the movable bearing portion against the peripheral surface of the shaft portion in an adjustable manner. The lighting fixture according to 1, 2 or 3. An illuminating body at the tip of the arm, with respect to a turning direction X about the vertical axis intersecting the arm axis, a swinging direction Y about the horizontal axis intersecting the arm axis, and a twisting direction Z about the extension axis of the arm axis It is a lighting fixture that can be freely changed in posture,
A ball means provided with a ball portion on a support shaft fixed to an arm, and a pair of half-divided divided bodies are combined in a palmed state, and held between a pair of spherical recesses. An intermediate means provided with a socket piece portion and a shaft piece portion extending laterally from the socket piece portion, and bearing means provided on the lighting body and supporting the shaft portion,
The socket piece portion of one divided body of the intermediate means has a control hole for fitting the cylindrical shaft externally inserted into the support shaft in a state where the support shaft of the ball means is inserted, and the control hole is The upper and lower edges are engaged with the cylindrical shaft so as to prevent the intermediate means from rotating in the swinging direction Y while constituting a long hole extending sideways so as to allow the intermediate means to rotate in the turning direction X. The engagement means is configured by
An illuminating device comprising: a pivoting rotation means that enables the posture of the illuminating body to be changed in the swinging direction Y by the shaft portion of the intermediate means and the bearing means. The cylindrical shaft is rotatable integrally with the intermediate means on the support shaft of the ball means with respect to the twisting direction Z, and between the cylindrical shaft and the annular wall portion provided on the arm so as to surround the cylindrical shaft. 6. A lighting apparatus according to claim 5, further comprising stopper means for restricting a rotation range of the cylindrical shaft rotated integrally with the intermediate means.

Images