JP4371476B2 - Desk lighting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a desk lamp that is mounted on a learning desk or the like that is configured so that a book shelf can be attached to and removed from a desk top.
[0002]
[Prior art]
2. Description of the Related Art In recent years, as a general learning desk for school children, a book shelf is provided on the back side of the top board, and the book shelf can be attached to and detached from the desk main body.
And the learning desk of such a structure is provided with the desk lighting device which can be equipped even if the book shelf is naturally attached or the book shelf is removed. Many of the desk lighting devices are configured such that fluorescent lamps along the left-right direction of the top board are attached to a bookcase or a desk body.
[0003]
[Problems to be solved by the invention]
However, since such a desk lighting device is configured to irradiate from the upper front side of the top plate, the amount of light emitted decreases as the irradiation distance increases, and thus approaches the front of the top plate. It shows a tendency to get darker. For this reason, the illuminance distribution on the entire top plate varies greatly, and the lighting configuration is unsatisfactory when using the desk as a learning or work surface for the entire top plate.
In the past, trying to solve this problem as much as possible, we tried to address the above-mentioned problem by making the desk lighting device, which is a fluorescent lamp, freely movable back and forth to brighten dark areas. The configuration is well known. In addition, what is disclosed in Japanese Utility Model Application No. 53-34506 distributes a pair of fluorescent lamps 100 and 100 to the left and right as shown in FIG. As a moving center, the other end side of the free end side is movably operated so that the fluorescent lamps are arranged in a square shape in plan view from an array state in which the fluorescent lamps are arranged in series on the left and right. Also exist.
However, in the former configuration of the desk lighting device, the distance that the fluorescent lamp can be moved back and forth is only a short distance, and the brightness of the top panel directly under the fluorescent lamp can be increased or decreased. However, it is not possible to make the front of the top plate evenly bright. In addition, the desk lighting device of the latter configuration is not able to make the entire top plate uniform brightness even if it is allowed to increase or decrease the brightness of the central portion of the top plate, but it is still in the part away from the central portion. It shows a tendency to darken.
[0004]
The present invention has been made in view of the above-described actual situation, and the main problem is that the top surface of the top of the desk can be made substantially uniform in brightness, and the illumination pattern on the top surface of the top is The point is to provide a desk lighting device that can be selected according to the use contents of the top board.
[0005]
[Means for Solving the Problems]
A lighting apparatus installed in bookshelf disposed on academic習机or the top plate, a light source, a plurality of ramps disposed substantially in series form in a horizontal position along the lateral direction of the top plate In addition, each of the lamp portions located on both outer sides in the left-right direction may be configured to be freely changeable to a vertically oriented posture that protrudes forward around the longitudinal axis on the outer end side thereof .
According to the above Ki構 formed, each lamp unit, in a substantially illumination state are arranged in a serial manner in a horizontal position along the lateral direction of the top plate, the light from the front and above onto the top plate is irradiated, top right under the lamp The lamp is brightest over the center of the plate, and each of the lamp portions located on both outer sides in the left-right direction is changed to a vertically oriented posture that protrudes forward around the vertical axis on the outer end side thereof. In the illumination state, each lamp unit is positioned directly on the top plate and arranged so as to distribute the top plate surface, so that the entire surface of the top plate is irradiated with substantially uniform light. In this vertically oriented irradiation state, the irradiation light does not directly enter the eyes, so that it is possible to configure a good illumination form with little eye fatigue.
Also, in the lighting state of the horizontal orientation, the light to irradiate is reflected by the top board, and the reflected light directly enters the user's eyes, so it is good when there is little reflection and you need to see clearly If you need to look at a photograph that can easily reflect light and reflect light easily, change the lamp part to a vertical orientation and use the side light as reflected light. It is possible to create a good lighting environment without entering into.
In addition, by changing the illumination postures of the left and right lamp units, the contents and texture of the illumination also change, so that the top plate can be used in various ways.
In addition, by illuminating the entire top plate evenly with each lamp part in the vertical orientation, it is possible to prevent hand darkness when working with both hands, regardless of whether you are right-handed or left-handed, or the left-hand lamp Only the right part can be placed in a vertical position to prevent right-handed users from getting dark, or only the right lamp part can be placed in a vertical position to prevent left-handed users from getting dark. Because of the ergonomic considerations such that learning and work can be performed smoothly without losing hands, it is highly reliable and easy to use.
Furthermore, if each lamp unit can be changed and changed between the lighting state in the horizontal posture and the lighting state in the vertical posture, each lamp unit can be turned on and off with a switch. Depending on the user's preference, each lamp unit can be used in the best illumination state by appropriately performing a selection operation and a selection operation of turning on or off.
[0006]
Moreover, the rotation range around the vertical axis of each lamp portion may be regulated within the range on the top plate .
According to the above Ki構 formed, since the result of effective illumination area of each lamp are present on the top plate surface, it is possible to provide a lighting device with illumination quality.
[0007]
In addition, a support arm is extended on both the left and right sides of the instrument body that can be attached to a learning desk or bookcase, and the outer end of the lamp part is rotated around the vertical axis on each of the tip side of each support arm. The pair of left and right lamp portions may be freely mounted and configured to be freely changeable between a horizontal posture in which their free ends oppose each other in the left-right direction and a vertical posture in which they protrude forward .
According to the above Ki構 formation, the right and left lamp unit, in a substantially illumination state are arranged in a serial manner in a horizontal position along the lateral direction of the top plate, the light from the front and above onto the top plate is irradiated from directly below the lamp The lamp is located in the brightest lighting state at the center of the top plate, and each lamp unit located on both outer sides in the left-right direction is changed to a vertical posture that protrudes forward around the vertical axis on the outer end side of the lamp unit. In the illumination state, the left and right lamp parts are positioned on the desk top plate surface and are arranged so as to distribute the top plate surface to the left and right, so that the entire top plate surface is in an illumination state that receives almost even light irradiation. .
In addition, changing the illumination positions of the left and right lamp units also changes the illumination content and texture, so that the top surface can be used in various ways.
[0008]
Moreover, between the arm holding part holding the said support arm and the instrument main body, the raising / lowering adjustment means which raises / lowers an arm holding part with respect to this instrument main body may be provided .
According to the above Ki構 formed, each lamp unit because it is connected to the arm portion, so will lift also the lamp unit by the vertical movement of the arm, the irradiation of light is weakened to the top plate surface as increases On the other hand, since the lamp part is also lowered by the lowering of the arm part, the irradiation to the top plate surface can be strengthened as it is lowered. In addition, since each lamp unit is configured to move up and down integrally with the arm unit, the light intensity (illuminance) on the top plate surface is proportional to the distance between the top plate surface and the lamp unit.
[0009]
In addition, temporary fixing means for engaging and holding the lamp portion in the horizontal posture may be provided in a portion where the lamp body in the horizontal posture faces each other .
According to the above Ki構 formed, in the horizontal position along the lateral direction of each lamp unit top plate, because it is secured in place by tacking means, appearance may be, also in the temporarily fixed state, always the same illumination The resulting lighting stability is high.
A first characteristic configuration of a desk lighting device according to the present invention is a lighting device mounted on a learning desk or a bookshelf arranged on the top board of the learning desk, wherein the light source is in a lateral orientation along the left-right direction of the top board. And each of the lamp parts positioned on both outer sides in the left-right direction are vertically oriented so as to protrude forward around the longitudinal axis on the outer end side of the lamp parts. It is configured to change the posture freely,
A cantilevered support arm is extended on both the left and right sides of the instrument body that can be attached to the learning desk or bookcase, and the outer end of the lamp part is arranged around the vertical axis around each end of the support arm. A pair of left and right ramps are mounted so as to be rotatable, and are configured to be freely changeable between a horizontal posture in which their free ends oppose each other in the left-right direction and a vertical posture in which they protrude forward.
Temporary fixing means for engaging and holding the lamp portion in a sideways posture in a state of supporting the free end side of the lamp portion is provided at a position where the lamp body is opposed to the lamp portion in the sideways posture. There is in point.
The second characteristic configuration of the desk lighting device according to the present invention is such that the lamp portion is supported in a state where the free end portion side of the lamp portion is supported at a position where the appliance main body and each of the lamp portions in the lateral posture are opposed to each other. Is provided with a temporary fixing means for engaging and holding in a lateral orientation.
According to a third characteristic configuration of the desk lighting device of the present invention, a positioning pin that protrudes downward is provided on the free end side of the lamp portion to constitute the temporary fixing means, and the lamp portion is in a sideways posture. In this case, a lateral groove with which the positioning pin rides and engages is formed on the upper surface side of the arm holding portion of the instrument body.
According to a fourth characteristic configuration of the desk lighting device of the present invention, a rotating piece that can be rotatably mounted around the front end portion of each of the support arms and a longitudinal axis is rearward in the lateral posture of each of the lamp portions. It is in the point which protrudes toward the said back side in the outer side edge part side of one side part which becomes.
According to a fifth characteristic configuration of the desk lighting device of the present invention, a rotating piece that can be rotatably mounted around the front end portion of each of the support arms and a longitudinal axis is provided on the rear side in the lateral posture of each of the lamp portions. And projecting toward the rear side on the outer end side of the one side portion, and
The tongue piece provided with the positioning pin is formed so as to protrude toward the rear side on the free end side of the one side piece portion of each lamp portion.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
FIG. 1 to FIG. 15 show an example in which the desk lighting device A of the present invention is applied to a learning desk C in which a book shelf B is detachably mounted.
The desk lighting device A is cantilevered from the instrument body 1 that can be attached to the learning desk C or the book shelf B on both the left and right sides (that is, the base end side is supported by another object while the distal end side is supported by another object. The support arm 2 is not fixed to the instrument body 1 and extends on the tip side. The outer end 3A of the ramp portion 3 is placed on the vertical axis on each of the tip 2A, 2A side of each support arm 2. A pair of left and right lamp parts 3, 3 are mounted in a state of being arranged in series in a lateral orientation along the left-right direction of the top plate C 1 by being mounted so as to be rotatable around the core X. These free end portions 3B are configured to be freely changeable between a lateral orientation in which the left and right sides oppose each other in a left-right direction and a vertical orientation that protrudes forward. Further, FIG. 7 discloses a state in which only the right lamp unit 3 is changed to the vertical orientation to increase the right illumination, and FIG. 8 illustrates only the left lamp unit 3 in the vertical orientation. FIG. 9 discloses a state in which the left side lighting is strengthened by performing the changing operation. In FIG. 9, the lamps 3 are changed to the intermediate position between the horizontal posture and the vertical posture to increase the lighting at the center of the top plate C1. The state to do is disclosed.
[0011]
The tip 2A of the arm 2 will be described in detail. As shown in FIGS. 11 and 12, the base 20a of the support base 20 made of aluminum die-casting is fitted into the tip of the support arm 2 made of an aluminum pipe. A synthetic resin umbrella part 3C of the lamp part 3 is fixed to an annular convex rotation receiving part 21a which is integrally formed on a joint body 21 which is fixedly fitted to the cylindrical tip part 20b of the support base 20 so as to fit over the entire length. 3D (specifically, on the outer end (3A) side of the one side part which is the rear side in the horizontal posture of the umbrella part 3C of the lamp part 3) In the state where the turning piece 3) projecting toward the rear side is externally fitted and the threaded support disk 25 is arranged above the turning portion 3D so that the turning portion 3D is positioned in the middle of the upper and lower sides. Through the through hole formed in the center X of the moving part 3D Then, the screw portion 25a of the support disk 25 is screwed into the central screw hole 21b of the rotation receiving portion 21a, so that the rotation portion 3D can be rotated between the support disk 25 and the rotation receiving portion 21a. By doing so, it is possible to make the lamp part 3 rotatable about the vertical axis X. Here, both the intermediate body 21 and the support disk 25 are made of synthetic resin.
[0012]
Further, the ring-shaped surface 21c at the base end of the intermediate body 21 has a hemispherical convex portion formed on one surface of an annular flange portion 20c formed at an intermediate portion of the support base 20 facing and facing this surface. A hemispherical recess 21d serving as a receiving portion for 20c is formed, and a coil having a diameter larger than that of the through hole 21f through which the cylindrical tip 20b of the support base 20 is inserted in the ring-shaped surface 21e of the tip of the intermediate body 21 A support base 20 in which a large-diameter recess 21g for accommodating the spring 23 is formed, and the threaded portion 24a of the threaded lid 24 provided along the central axis Z from the distal end side of the intermediate body 21 is inserted into the intermediate body 21. The coil spring 23 is in a compressed state by being screwed into a female thread portion 20f formed at the axial center of the cylindrical tip portion 21b, and the intermediate body 21 is pressed against the support base 20 through elastic force.
By adopting such a configuration, in a normal state, the state in which the convex portion 20d of the support base 20 is fitted in the concave portion 21c of the intermediate body 21 by the compressive force of the coil spring 23 is maintained. Is held horizontally, but unexpectedly, a sudden and large impact force is applied to the ramp portion 3, and when a force that exceeds the compressive force of the coil spring 23 is applied, the intermediate body 21 is attached to the support base 20. As a result of the rotation, the concave portion 21c of the intermediate body 21 is removed from the convex portion 20d of the support base 20, so that the lamp portion 3 also rotates together.
[0013]
Accordingly, since the magnitude of the impact force that the lamp unit 3 rotates is set in a range in which the lamp unit 3 is not damaged, it is avoided that the lamp unit 3 is damaged by rotating. It has a configuration that can. Moreover, even if it rotates, it can be returned to the original state by rotating it to the original state, and it has a highly reliable configuration.
[0014]
The lamp unit 3 is a light source, for example, a commercially available fluorescent tube 30 that can be automatically turned on in a foldable type (for example, about 18 w that forms sufficient illuminance when the distance to the top plate C1 is about 50 cm to 80 cm. Fluorescent tube) is installed. Further, for example, a translucent reflector 31 is disposed on the back side of the fluorescent tube 30 in the lamp unit 3, and the light irradiated from the fluorescent tube 30 is uniformly scattered on the lower surface of the lamp unit 3. The light distribution plate 32 is attached. Here, a specific light source of the lamp unit 3 may be an ordinary small fluorescent tube. In this case, a lighting part such as a glow or a ballast necessary for lighting is the lamp unit 3 or a fixture. The main body 1 may be configured to be distributed.
In the figure, reference numeral 33 denotes a handle attached to the umbrella part 3B for facilitating the rotation operation of the lamp part 3.
[0015]
The lamp units 3, 3 arranged on the left and right sides can be turned on and off by the respective ON / OFF operations of the switches 34, 34 provided on the front surface of the instrument body 1.
[0016]
The desk lighting device A is provided between the arm holding part 4 holding the support arm 2 and the instrument main body 1 with an elevation adjusting means D for raising and lowering the arm holding part 4 with respect to the instrument main body 1. ing. Here, for example, the desk lighting device A is screwed into the book shelf B by screwing the bolt 70 into the female screw portion at the bottom of the instrument body 1 through a through hole formed in the shelf board 10 of the book shelf B as shown in FIG. It is connected. As shown in FIG. 15, the arm holding portion 4 sandwiches the center portion of the support arm 2 between a lower die 4A and an upper die 4B made of aluminum die cast and formed in a receiving shape corresponding to the support arm 2. By connecting the upper die 4A to the die 4B via a screw 4C having a disk-like head shape, the support arm 2 is sandwiched.
[0017]
Ascending / descending adjustment means D is installed in the instrument body 1, and as shown in FIG. 13, a cylindrical attachment base 4A of the arm holding part 4 is fitted into the upper end part, and a lower lid 40A is attached to the lower end, and An elevating cylinder 40 with a U-shaped circumferential stop groove formed inside the wiring path 40B, and an enclosing cylinder portion 41a surrounding the elevating cylinder 40 corresponding to the shape of the elevating cylinder 40 in a partially cutout state. And a receiving plate 41c in which an insertion hole 41b is formed in an axis R perpendicular to the axis Q of the lifting cylinder 40 that is located outside the enclosure and is integrally connected to the left and right cut-out ends. , 41c, a screw rod 42 that is internally threaded at both ends that are inserted across the insertion holes 40b, 40b of each of the pressure receiving plates 41c, 40c, and a screw rod 42 that is formed at each end of the screw rod 4 separately. It can be screwed and operated from both sides of the instrument body 1 And an operating knob 43 and 43 Metropolitan that out.
[0018]
With the lifting / lowering adjusting means D having such a configuration, when the operation knobs 43 and 43 are gripped with the left and right hands so that the pressure receiving plate 41 fastens the lifting cylinder 40, the lifting cylinder 40 is moved to the pressure receiving plate 41. The lifting cylinder 40 can be stopped at that position, and conversely, if the operation knobs 43 and 43 are operated in reverse of the stop, the lifting cylinder 40 is released from the restraint of the pressure receiving plate 41. Thus, the lifting cylinder 40 can be moved up and down. Further, although not shown, a lowering prevention table is provided in the lowermost position of the lifting cylinder 40 inside the instrument body 1, and even if the lifting cylinder 40 is located at this lowest position. The upper end of the lifting cylinder 40 is exposed from the instrument body 1.
[0019]
A temporary fixing means E that engages and holds the lamp unit 3 in the sideways posture is provided at a position where the lamp body 3 and the lamp units 3 and 3 in the sideways posture are opposed to each other. As shown in FIG. 15 and FIG. 15, the tongue piece 50 </ b> A provided on the free end side 3 </ b> B of each ramp portion 3 is provided with a positioning pin 50 protruding downward, and on the upper surface side of the arm holding portion 4 of the instrument body 1. When the ramp portion 3 is set to the horizontal posture, the positioning pin 50 slightly climbs and engages with the horizontal groove 51.
Further, the positioning pin 50 is engaged with the lateral groove 51 by using the play of the connecting portion between the ramp portion 3 and the arm tip portion 2A, and lifting the free end side of the ramp portion 3 by the amount of play. It can be released by rotating it.
[0020]
In the state where the bookcase B is removed, the desk lamp A can be mounted using a clamp that can sandwich the edge of the top plate C (not shown).
[0021]
[Second Embodiment]
The plurality of lamp portions 3 and 3 in the first embodiment described above are attached via one instrument body 1 attached to the bookcase B, but the present invention is not limited to this, and is shown in FIG. As described above, the appliance main bodies 1 and 1 are attached to the back plate B1 of the bookshelf B at the same height and distributed to the left and right, and the lamp portion 3 can be rotated about the vertical axis X1 with respect to the appliance main body 1. It may be configured to.
Even in such a configuration, each of the lamp units 3 is configured by a plurality of lamp units 3 arranged in series in a lateral orientation along the left-right direction of the top plate C1, and each of the lamp units 3 positioned on both outer sides in the left-right direction. Can be changed to a vertically oriented posture that protrudes forward around the vertical axis X1 on the outer end side thereof.
[0022]
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
[0023]
[Third Embodiment]
FIG. 17 includes three lamp parts 3, 3M, 3 arranged in series in a lateral orientation along the left-right direction of the top plate C1, and both left and right directions excluding the central solid lamp part 3M. An example of a configuration in which each of the lamp units 3 and 3 positioned on the outside can be changed and operated to a vertical posture projecting forward around the vertical axis X2 on the outer end side thereof will be described.
[0024]
According to the above characteristic configuration, in the illumination state in which the lamp units 3, 3 </ b> M, and 3 are arranged substantially in series in a lateral orientation along the left-right direction of the top plate C <b> 1, light is irradiated on the top plate C <b> 1 from the upper front. The center portion of the top plate C1 is in the brightest illumination state, and the lamp portions 3 and 3 positioned on the left and right outer sides are vertically oriented so as to protrude forward around the vertical axis X2 on the outer end side thereof. In the illumination state changed to the posture, each lamp unit is located directly on the top plate C1, and the central fixed lamp unit 3M is located at the center of the left and right lamp units 3, 3, and the top plate C1 surface. Is arranged in such a manner that the light is distributed into three, so that the substantially uniform light irradiation state is obtained over the entire top plate C1.
In addition, changing the illumination state of the left and right lamp units also changes the content and texture of the illumination, so that the top plate C1 unit can be used in a variety of ways.
[0025]
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
[Brief description of the drawings]
FIG. 1 is a cross-sectional plan view showing a state in which the desk lamp according to the first embodiment of the present invention is in a horizontal posture. FIG. 2 is a cross-sectional plan view showing a state in which the desk lamp is in a vertical posture. FIG. 4 is a side sectional view showing a state in which the desk lamp is in a horizontal posture. FIG. 5 is a side view showing a state in which the desk lamp is in a vertical posture. FIG. 6 is a front view showing only the main part when the desk lamp is in a horizontal orientation. FIG. 7 is a plan cross-sectional view of the left and right lamps with different postures. FIG. FIG. 9 is a cross-sectional plan view of the left and right ramps with different postures. FIG. 10 is an exploded perspective view of the arm tip. FIG. 11 shows the arm tip. Cross-sectional view [FIG. 12] Cross-sectional view showing the arm holding portion [FIG. 13] It is an explanatory view showing the engagement,
(A) is an explanatory view showing a state in which the lifting / lowering adjusting means is assembled to the instrument body in a perspective view (b) an explanatory view showing the lifting / lowering adjusting means in a perspective view. FIG. 14 is a simplified side view showing a positioning pin and a handle of a lamp part. FIG. 15 is a plan view of a main part showing a relationship between a positioning pin and a concave groove of a lamp part. FIG. 16 is a plan sectional view showing a desk lamp according to a second embodiment. FIG. 17 is a desk lamp according to a third embodiment. FIG. 18 is a plan view showing a conventional desk lighting device.
A Desk lighting device B Bookcase C Learning desk C1 Top plate D Elevation adjustment means E Temporary fixing means 1 Instrument body 2 Support arm 3 Lamp part 4 Arm holding part

Claims (5)

A lighting device mounted on a learning desk (C) or a bookshelf (B) disposed on a top plate (C1) thereof, wherein the light source is substantially in a lateral posture along the left-right direction of the top plate (C1). a plurality of ramps arranged in a serial manner with consist (3), the longitudinal axis respectively, of its outer end (3A) side of the lamp unit which is located on both outer sides of the left-right direction (3) (X ) It is configured to be freely changeable to a vertical posture that protrudes forward around it ,
A cantilevered support arm (2) is extended from the instrument body (1) that can be attached to the learning desk (C) or bookcase (B) to the left and right sides, and the tip (2A) of each support arm (2). On each of the sides, an outer end (3A) of the ramp portion (3) is rotatably mounted around the longitudinal axis (X), and a pair of left and right ramp portions (3) are connected to their free end portions. (3B) A desk lighting device configured to be freely changeable between a horizontal posture facing each other in the left-right direction and a vertical posture protruding forward . In the part which the said instrument main body (1) and each said lamp | ramp part (3) in the said horizontal attitude | position oppose, a lamp | ramp part (3) in the state which supports the free end part (3B) side of a lamp | ramp part (3). The desk lighting device according to claim 1, further comprising: a temporary fixing means (E) for engaging and holding the bracket in a horizontal posture . In order to constitute the temporary fixing means (E), a positioning pin (50) protruding downward is provided on the free end (3B) side of the ramp portion (3), and the ramp portion (3) is turned sideways. The desk-side use according to claim 2, wherein a lateral groove (51) on which the positioning pin (50) rides and engages when being in a posture is formed on the upper surface side of the arm holding portion (4) of the instrument body (1) . Lighting device. The turning pieces (3D) that can be attached to the front end portions (2A) of the respective support arms and the longitudinal axis (X) so as to be turnable are rearward in the lateral postures of the respective lamp portions (3). The desk-top lighting device according to any one of claims 1 to 3, wherein the desk-side lighting device is formed to protrude toward the rear side on the outer end (3A) side of the one side portion . The turning pieces (3D) that can be attached to the front end portions (2A) of the respective support arms and the longitudinal axis (X) so as to be turnable are rearward in the lateral postures of the respective lamp portions (3). While projecting toward the rear side on the outer end (3A) side of the one side part,
A tongue piece (50A) provided with the positioning pin (50) is formed to protrude toward the rear side on the free end part (3B) side of the one side piece part of each ramp part (3). 3. The desk lighting device according to 3 .

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