JP2004288474A - Led array type lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED array type lighting device with improved usability of which the focus of the light of the LED can be moved to an arbitrary position. <P>SOLUTION: A mounting pedestal 4 to which a pair of LED3 are mounted is arranged so as to contact with a side surface 5b<SB>2</SB>of a flange 5b forming a large groove 5a of respective frames 5, and wire shaped members 8 prevented from slip-off by a plate-shaped metal fitting 11 loosely inserted in a small groove 5c of respective frames 5 is inserted into a lateral hole 9 of the mounting pedestal 4, and fixed to the wire shaped members 8 by a stopping pin inserted into a vertical hole 10 of the mounting pedestal 4. One end of the wire shaped members 8 are inserted into a rotational joint 12 and fixed by the fixing pins 13 respectively. The rotational joint 12 is appropriately inserted into an end plate 14b of a large operation rod 14 and inserted into a bottomed hole 15b<SB>1</SB>of a small operation rod 15 and fixed to the small operation rod 15. By the above, when the small operation rod 15 is rotated in an appropriate direction, the wire shaped member 8 coincidentally rotates, and the LED3 rotates accompanying with the rotation of the mounting pedestal 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an LED (light emitting diode) array type illuminator suitable not only for medical use but also for measurement and inspection of precision machines and electronic components.
[0002]
[Prior art]
The LED array-type illuminator focuses on the advantages of LEDs, that is, features such as low power consumption, low heat generation, directivity of light irradiation, and low diffusion. This type of illuminator is conventionally provided in a plurality of rows on a concentric circle (for example, Patent Document 1).
As shown in FIG. 7A, the illuminator disclosed in Patent Document 1 is a surface illuminator 100 including a lens housing 101 and a disk-shaped lamp supporting housing 102 surrounding the lens housing 101 in an annular shape. A number of lamps (LEDs) 103 are mounted on the lower surface side of the lamp 102, and these lamps 103 form five rows on the circumference of the radii R1 to R5 from the center of the housing 102 as shown in FIG. And is divided into eight sections indicated by symbols S1 to S8 at equal intervals on the circumference. The lamps 103 in five rows are arranged such that their light axes are at a predetermined angle with respect to the center line of the housing 102 for each row, as shown in FIG. The intersection, that is, the focal point is always determined at a fixed position of the inspection object 105 placed on the workbench 104. In the surface illuminator 100 having such a configuration, the lamp 103 can be turned on electrically for each of the eight sections S1 to S8 and for each of the five rows.
[0003]
[Patent Document 1]
JP-A-10-54940 (pages 3 and 4, FIGS. 1 and 2)
[0004]
[Problems to be solved by the invention]
However, the above-described surface illuminator is configured such that the lamps to be turned on are electrically selected to change the brightness of the illumination for the inspection object, and that illumination can be performed from different directions. Since the lamps are fixed to face each other, it is impossible to change the direction of the lamps, and therefore, the focal points of these lamps are fixed at fixed positions. For this reason, when the focus on the inspection object is deviated, it is necessary to move the lamp support housing or the workbench up and down, for example, to adjust the focus, which is inconvenient and inconvenient.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide an LED array type illuminator in which the focus of an LED can be moved to an arbitrary position or a predetermined focal position to improve the usability.
[0006]
[Means for Solving the Problems]
In order to solve the above problem, an LED-type illuminator according to claim 1 of the present invention is a LED illuminator in which a frame in which a plurality of LEDs are arranged at appropriate intervals on a circular arc and in a plurality of rows on a concentric circle is formed in a circle. A plurality of LEDs are arranged on the circumference, and these LEDs are arranged rotatably for each frame or each frame as a series of frames. The LEDs themselves are arranged so as to be mechanically rotatable. With this arrangement, the focus of the LED can be moved to an arbitrary position, and the usability is improved.
[0007]
In the LED-type illuminator according to claim 2 of the present invention, a plurality of LEDs are arranged on a frame at appropriate intervals on the circumference and in a plurality of rows on a concentric circle, and The beam axis of the LED in one row and the beam axis of the LED in another row form different focal points, respectively, and the LEDs of the row selected from the plurality of rows are turned on. Then, by electrically selecting the LEDs having different light axes from each other, the focal point of the LED can be moved to a predetermined position (predetermined focal position) without moving, for example, the lamp support housing or the work table. When the focus position is determined in advance, the usability is improved.
[0008]
An LED-type illuminator according to claim 3 of the present invention relates to a more specific and simple configuration of the LED-type illuminator according to claim 1, and rotatably supports a wire-like member on the frame. A plurality of mounts on which the LEDs are mounted are fixed to the wire-like member along the frame so that the LEDs are arranged as described above, and the wire-like member is fixed to a cylindrical shaft, and the cylindrical shaft is optionally fixed. Are supported so as to be able to be held at a rotation angle of.
[0009]
Further, the LED type illuminator according to claim 4 of the present invention is configured such that the case provided with the frame is attached so as to be tiltable in an arbitrary direction and to be able to stop at this inclined position. It is an improvement in usability.
[0010]
The LED illuminator according to claim 5 of the present invention is configured such that a magnifying glass is attached to the upper surface side of the case, and the arm of the magnifying mirror can be rotated and positioned at a predetermined angle. This improves convenience in the case where it becomes necessary to expand the object.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An LED illuminator according to a first embodiment of the present invention will be described with reference to FIGS.
First, an external configuration of the LED illuminator will be described with reference to FIGS.
In the LED illuminator 1, the case 2 has a C-shaped arc shape, and a frame 5 is accommodated in a case body having a substantially U-shaped cross section having a downwardly facing opening. As will be described in detail later, the frame 5 is provided with a mounting base 4 on which the LEDs 3 are mounted so that the LEDs 3 are arranged in the following arrangement. As will be described in detail later, the case 2 can be freely tilted in an arbitrary direction at a center position of the upper surface of the C-shaped arc, and protrudes through a ball joint mechanism 6 which can be stopped at this inclined position. It is attached to one end of the pipe 30. Note that reference numeral 7 in FIG. 1 denotes a transparent cover attached to the opening of the case body.
[0012]
In the LED illuminator 1, the other end of the overhanging pipe 30 is fitted into one opening of the pipe angle adjusting hinge 31, and expands and contracts into the other opening of the pipe angle adjusting hinge 31. One end of the pipe 32 is fitted. The hinge 31 for adjusting the pipe angle is capable of adjusting the angle of the projecting pipe 30 with respect to the telescopic pipe 32, for example, a known index hinge, and 31a is an operation button for this adjustment. (FIG. 1 shows an adjustment of approximately 90 °). The telescopic pipe 32 is attached to a column 34 via a joint 33 so as to be able to expand and contract in the direction of the arrow in FIG. Reference numeral 35 denotes a lock screw for fixing the other end of the telescopic pipe 32 to the column 34, and reference numeral 36 denotes a lock screw for stopping rotation of the telescopic pipe 32 with respect to the column 34. The column 34 is fixed to a leg 38 on which a caster 37 is mounted. By the way, in the LED illuminator 1, a power supply box 39 for LED is attached below the support 34, and the power switch 39 a of the power supply box 39 is turned on / off to turn on / off the LED 3. In addition, 40 is a power cord connected to the LED power supply, and 41 is an outlet.
[0013]
The rotation mechanism of the LED 3 in the LED illuminator 1 having such an external configuration will be described with reference to FIG. In the present embodiment, the frames 5 are respectively symmetrically accommodated in the case main body at the center position of the C-shaped circular arc of the case 2 in a manner as shown in FIG. The LEDs 3 arranged on the frame 5 are mechanically rotated at a time. Here, the right frame 5 in FIGS. 1, 2 and 3 will be described, but the same applies to the left frame 5.
[0014]
As shown in FIG. 3, the frame 5 is provided with a U-shaped large groove 5a in a substantially semi-arc-shaped thin plate member at regular intervals along the circumference and open toward the outer circumference. on one end face (surface opposite to the surface facing the opening port side of the case body) 5b ₁ side of the flange 5b forming the large groove 5a is a small groove 5c the wire-like member 8 is loosely inserted is provided.
In the present embodiment, the mounting base 4 is formed of a T-shaped member composed of a horizontal member 4a and a vertical member 4b, and a pair of the horizontal members 4a is provided with a pair of the lead wires of the LED 3. The LED 3 is mounted such that the vertical member 4b is symmetrically suspended from the horizontal member 4a, and the mounting base 4 is provided with a horizontal hole 9 in which the wire-like member 8 is loosely inserted substantially at the center thereof. A vertical hole 10 is provided in such a manner as to be perpendicular to the horizontal hole 9 from the center of the upper surface of the horizontal member 4a.
And these mount 4, while being in contact with arranged in one side surface 5b ₂ of the flange 5b to form a large groove 5a of the frame 5, next to the hole 9 of the mounting base 4 is slow in the small groove 5c of the frame 5 The wire-shaped member 8 inserted and retained by the plate fitting 11 is inserted therethrough, and is fixed to the wire-shaped member 8 by a stopper pin inserted into the vertical hole 10 of the mounting base 4. One end of the wire-shaped member 8 is inserted into the center axis of the rotary joint (cylindrical shaft) 12, and is fixed to the rotary joint 12 by a stopper pin 13. Such a configuration is the same for the left frame 5.
[0015]
Therefore, in the arrangement of the LEDs 3 in the present embodiment, in the case body, a plurality of LEDs are arranged at appropriate intervals on the arc (interval between the flanges 5b) and in two rows on a concentric circle. It is formed by accommodating each frame 5 as described above.
[0016]
However, as shown in FIG. 3, the rotary joint 12 of the wire member 8 disposed on the right frame 5 and the rotary joint 12 of the wire member 8 disposed on the left frame 5 plate (also serving as a side plate of the casing 2) with fitted respectively at an appropriate fitting tolerances in the bearing hole 14b ₁ provided 14b, respectively inserted into blind hole 15b ₁ provided in end plates 15b of the small operating rod 15 Is done. That is, the large operating rod 14 is provided with a base plate 14a, end plates 14b erected at both ends of the base plate 14a, and a center of the base plate 14a opposite to the erected side of the end plate 14b. The small operation rod 15 is also a member having a substantially yoke shape similar to the large operation rod 14, and includes a base plate 15a and the base plate 15a. composed of an end plate 15b that is respectively erected on both ends of the center of the base plate 15a, the standing side where the end plate 15b and the shaft rod 15c having a knob portion 15c ₁ projecting from the opposite side Have been. Then, it said rotary joint 12, together are fitted respectively at an appropriate fitting tolerances the bearing hole 14b _1, are respectively inserted into blind hole 15b ₁ provided in end plates 15b, provided on the end face of the rotary joint 12 a small hole 12a which is, this communicated to the small hole 12a, is fixed to a small operating rod 15 by a retaining pin driven into the small hole 15b ₂ of the hole bottom of the blind hole 15b _1. Such a small operation rod 15 is disposed above the base plate 14a of the large operation rod 14 and between both end plates 14b of the large operation rod 14, and the shaft rod 15c of the small operation rod 15 is provided. Are arranged in a slit 14d provided so as to penetrate the base plate 14a of the large operation rod 14 and reach a substantially central portion of the shaft rod 14c of the large operation rod 14, and pick the shaft rod 15c from the slit 14d. part 15c ₁ are disposed so as to protrude. As will be described later, the large operation rod 14 and the small operation rod 15 can be operated independently, of course.
The other end of the wire member 8 is a so-called free end.
[0017]
Next, a ball joint mechanism 6 that allows the case 2 on which the frame 5 is disposed to be able to freely tilt in any direction and to be able to stand still at this tilt position will be described with reference to FIG. In FIG. 4, the same members as those in FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof will be omitted.
The ball joint mechanism 6 includes a ball joint 16, a substantially cubic bearing 17 into which the spherical portion 16a of the ball joint 16 is inserted, and a spherical portion 18a of the bearing 17 which faces the spherical portion 16a. And a cylindrical connecting member 19 fitted into a long cylindrical portion 18b of the ball joint 18 in a manner orthogonal to the central axis of the cylindrical portion 18a. The ball joint 20 has the same shape as that of the ball joint 16 and has a substantially rectangular parallelepiped bearing 21 into which the spherical portion 20a of the ball joint 20 is inserted. I have. The short cylindrical portion 16b of the ball joint 16 is fitted into the case 2 at the center of the side surface of the C-shaped arc of the case 2 while facing the insertion hole of the spherical portion 20a of the bearing 21, In addition, one end of the overhang pipe 30 is fitted into a through hole 21 a provided at a position penetrating the pair of both side surfaces of the bearing 21.
[0018]
By the way, the bearing 17 is provided with a slit 17a at a substantially central position between an insertion portion of the ball portion 16a of the ball joint 16 and an insertion portion of the ball portion 18a of the ball joint 18, and in a manner orthogonal to the slit 17a, Slits 17b and 17c are provided in the insertion portion of the spherical portion 16a and the insertion portion of the spherical portion 18a, respectively. Further, the bearing 17 has threaded holes 17d and 17e into which adjustment screws 23 with springs 22 for adjusting the gaps between the slits 17b and 17c are screwed. Therefore, by moving the adjusting screw 23 forward and backward, the fitted state of the bearing 17 and the ball joint 16 and the fitted state of the bearing 17 and the ball joint 18 can be adjusted. Further, the bearing 21 is provided with a slit 21b at a position where the spherical portion 20a is inserted in a manner parallel to the through hole 21a, and the same as described above for enabling the gap of the slit 21b to be adjusted. A screw hole 21c into which the adjusting screw 23 with the spring 22 is screwed is formed. Therefore, the fitting state of the bearing 21 and the ball joint 20 can be adjusted by moving the adjusting screw 23 forward and backward.
[0019]
Further, in the LED illuminator 1, as shown in FIGS. 1 and 2, a magnifying mirror 25 is arranged on the upper surface side of the case 2, and a predetermined position of the outer peripheral edge of the magnifying mirror 25 At a position on the center line of the upper surface of the C-shaped arc of the case 2, one end of the short plate 26 a of the substantially “square” arm 26 composed of the short plate 26 a, the connecting plate 26 b and the long plate 26 c is torqued. The arm 26 is attached via a hinge 27, and a long plate 26c of the arm 26 is attached to a center position of a side surface of the C-shaped arc of the case 2 by a set screw. Thereby, the magnifying glass 25 can be rotated at a predetermined angle via the torque hinge 27 and can be stopped at the rotation position.
[0020]
How to use the LED illuminator 1 will be described.
In the present LED illuminator 1, the LEDs 3 arranged on the pair of frames 5 rotate at one time. Therefore, when the focus of each LED 3 is adjusted to, for example, the focal position P in FIG. 1, when the small operation rod 15 is rotated in an appropriate direction, the wire-shaped member 8 is provided with the rotation of the small operation rod 15. Since the mounting base 4 of each frame 5 on which the LED 3 is mounted rotates integrally, the LED 3 of each frame 5 can be adjusted to the focal position P.
When the focal position P is moved to the focal position Q, the small operation rod 15 is rotated in an appropriate direction to adjust the LED 3 of each frame 5 to the focal position Q. Since it can be performed, the usability becomes much better than before.
[0021]
As described above, in the LED illuminator 1, the case 2 is attached to the overhanging pipe 30 via the ball joint mechanism 6, and the case 2 is mounted on the bearing via the ball joint 16 by the ball joint mechanism 6. In addition, since the bearing 17 can be tilted in any direction with respect to the bearing 21, that is, the overhanging pipe 30 via the ball joints 18 and 20, and can be stopped at this tilt position, If the large operation rod 14 is appropriately operated, the case 2 can be freely tilted in any direction in the three-dimensional space with respect to the overhanging pipe 30 and can be stopped at this tilted position, thereby improving usability. .
Further, in the LED illuminator 1, as described above, the magnifying mirror 25 is provided, and the magnifying mirror 25 can be rotated at a predetermined angle and stopped at the rotation position. Usability is improved when it becomes necessary to enlarge an object.
[0022]
By the way, in the present embodiment, the frames 5 are respectively symmetrically accommodated in the case main body at the center position of the C-shaped arc of the case 2 in a manner as shown in FIG. As described above, the case where the LEDs 3 arranged on these frames 5 rotate at one time has been described. However, in order to make it easier to see the object illuminated by the LEDs 3, the case 2 is formed in a C-shaped arc shape as described above. Alternatively, the frames 5 may be stored symmetrically at the center position of the C-shaped arc, and the LED 3 may be rotated for each frame 5. In this case, as shown in FIG. 5, for each frame 5, the rotary joint 12 is fitted to a bearing hole 32a provided in a substantially rectangular end plate 32 also serving as a side plate of the case 2 with an appropriate fitting tolerance. At the same time, it is inserted into the bottomed hole 33a of the elongated substantially rectangular rod-shaped lever 33. Then, the rotary joint 12 is connected to the small hole 12a provided on the end face of the rotary joint 12 and the small hole 33b at the bottom of the bottomed hole 33a communicating with the small hole 12a by the stopper pin. 33 may be fixed. By rotating the lever 33 provided for each frame 5, it is needless to say that the LEDs 3 arranged on each frame 5 can be rotated for each frame 5. In FIG. 5, the same members as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
[0023]
Next, an LED illuminator according to a second embodiment of the present invention will be described with reference to FIG. 6, the same members as those in FIGS. 1 to 5 are denoted by the same reference numerals, and description thereof will be omitted. Also, in FIG. 6, the attachment members and the like of the case 51 are omitted.
In the present LED-type illuminator 50, the case 51 has a C-shaped arc shape similar to the case 2 described above, and the case main body has a substantially inverted “C” shape in cross section having an opening facing downward. The frame 52 is disposed along the case 51 so as to close an opening in the case body, and the plurality of LEDs 3 are arranged at appropriate intervals along the circumference of the frame 52. In addition, they are arranged in three rows on a concentric circle. Then, all the LEDs 3 arranged in the frame 52 are fixed in the slits 52a to 52c formed in the frame 52, and in the case of the present embodiment, are located at the innermost side among the slits 52a to 52c. The rows of slits 52a are inclined at an angle of 56 ° with respect to the horizontal plane of the case body 51, and the middle rows of slits 52b are inclined at an angle of 64 °, and furthermore, the outermost rows of slits 52c. Is fixed at an angle of 68.6 °, so that, as shown in FIG. 6, the ray axis of LED3 in one of these three rows and the ray axis of LED3 in the other row. Respectively form different focal points.
In such an LED illuminator 50, for example, by turning on the LED3 of a row selected from these three rows using electric means, the focal point of the LED3 moves to a predetermined position. When the focus positions R, S, and T are determined in advance, the usability is improved.
[0024]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the LED illuminator of this invention, the usability can be improved by moving the focus of the LED by a simple method.
[Brief description of the drawings]
FIG. 1 is an external configuration diagram of an LED-type illuminator according to a first embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG. 1;
FIG. 3 is an explanatory view of a rotating mechanism of an LED in the lighting device of FIG. 1;
FIG. 4 is an explanatory view of a case tilting mechanism in the illuminator of FIG. 1;
FIG. 5 is an explanatory diagram of a rotation mechanism employing a rotation method for each frame.
FIG. 6 is a schematic configuration diagram of an LED illuminator according to a second embodiment of the present invention.
FIG. 7 is a configuration diagram of a conventional LED illuminator.
[Explanation of symbols]
1,50 LED type illuminator 2,51 Case 3 LED
4 Mounting base 5, 52 Frame 8 Wire-shaped member 12 Rotary joint (cylindrical shaft)
30 magnifier

Claims (5)

A plurality of LEDs are arranged at appropriate intervals on an arc, and a plurality of frames arranged in a plurality of rows on a concentric circle are arranged on the circumference, and these LEDs are arranged for each frame or for each frame. An LED array-type illuminator characterized by being rotatably arranged in a frame. A plurality of LEDs are arranged on the frame at appropriate intervals on the circumference and in a plurality of rows on a concentric circle, and the light beam axis of the LED in one of the plurality of rows and the other in the other rows. An LED array type illuminator characterized in that each of the LEDs forms a focal point having a different light axis from each other, and turns on the LEDs in a row selected from the plurality of rows. A wire-like member is rotatably supported on the frame, and a plurality of mounting bases on which the LEDs are mounted are fixed to the wire-like member along the frame so that the LEDs form the array. The LED array type illuminator according to claim 1, wherein the LED array illuminator is fixed to a cylindrical shaft, and the cylindrical shaft is supported so as to be held at an arbitrary rotation angle. The LED array type according to any one of claims 1 to 3, wherein the case in which the frame is disposed is attached so as to be tiltable in an arbitrary direction and to be able to stop at this inclined position. Illuminator. The magnifying mirror is arranged on the upper surface side of the case, and the magnifying mirror can be tilted with respect to the case, and can be stopped at this tilted position. The LED array-type illuminator according to claim 1.

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