JP4557901B2 - Lighting device - Google Patents

Description

  The present invention relates to an illuminating device in which a rectangular substrate on which a plurality of LEDs are mounted is disposed in a translucent tubular container.

  Conventionally, LEDs are attracting attention as light sources because of their power saving and long life compared to fluorescent lamps or incandescent lamps that have been used as light sources, and lighting devices using LEDs are used indoors. It has come to be widely used not only for lighting equipment, but also for road lighting equipment, lighting equipment in industrial machinery / equipment, and warning lights.

As an example of such an illuminating device using LEDs, both ends of a light-transmitting tube having both ends opened are fitted and fixed to a non-transparent cap, and the light-transmitting tube has a predetermined interval over the entire length thereof. There has been proposed a light emitting device (illuminating device) in which a printed circuit board to which a large number of LEDs are connected is provided and both ends of the printed circuit board are fixed to a cap with an adhesive (see Patent Document 1).
Utility Model Registration No. 3001842

  However, in the illumination device of Patent Document 1, since both ends of the printed circuit board are fixed to the cap, if there is a dimensional error of the light transmissive tube, the cap, or the printed circuit board, there is a problem in fixing the printed circuit board. May occur. Also, for example, when the lighting device is used for lighting in industrial equipment / devices, when changing the length of the lighting device according to the size of the industrial equipment / device, a light transmissive tube or a printed circuit board, etc. Therefore, it is necessary to prepare many kinds of parts in advance.

  Further, in the illumination device of Patent Document 1, the mounting plate to which the printed circuit board is fixed is disposed on the diameter of the light transmissive tube and is fixed to the inner wall of the light transmissive tube. When inserting and assembling in the tube, there is a problem that it is difficult to assemble due to friction between the mounting plate and the light transmissive tube.

The present invention has been made in view of such circumstances, a fixing member for fixing one end portion of the substrate to the end portion of the tubular container, and attached to the other end portion of the substrate, the substrate in the tubular container A supporting plate for fixing the other end of the substrate so that the central portion in the width direction of the substrate is disposed in the vicinity of the central axis of the tubular container, and the fixing A plurality of contact pieces provided on the plate and spaced apart from each other along the circumferential direction of the tubular container and abutting against the inner circumferential surface; and the lateral ends of the substrate are separated from the inner circumferential surface of the tubular container. By arranging the substrates apart from each other, the assembly is easier than in the prior art, and there is an error in the length of the substrate or the length of the tubular container, or the length of the substrate is different. also, it is possible to fix the substrate to the tubular container, the tube And to provide a lighting device which can be miniaturized diameter of the vessel was reduced.

  Another object of the present invention is to fix the fixing plate so that the ends of the two substrates face each other, fix one end to the fixing plate, and support the other end. It is another object of the present invention to provide an illuminating device that can further change the length using the same substrate by connecting the two substrates via the fixing plate.

  In addition, another object of the present invention is that the separation dimension between the fixing member and the support member or the separation dimension between the support members is 300 mm or less, so that the present invention is used for equipment / devices provided with an electric motor nearby. In such a case, an object of the present invention is to provide a lighting device that can prevent vibration applied to the substrate from resonating.

  Another object of the present invention is to reduce the size of the tubular container by reducing the diameter of the tubular container while maintaining the strength of the substrate, because the substrate is made of epoxy resin and has a thickness of 1 mm to 2 mm. It is in providing the illuminating device which can do.

A lighting device according to a first aspect of the present invention is a lighting device in which a rectangular substrate on which a plurality of LEDs are mounted is disposed in a translucent tubular container, and a fixing member that fixes one end of the substrate to the end of the tubular container If, mounting et is the other end of the substrate, and a support member supporting the substrate in front Symbol tubular container, the support member includes a central portion in the width direction of the substrate central axis of the tubular container A fixing plate to which the other end portion of the substrate is fixed to be disposed in the vicinity, and a plurality of contact pieces provided on the fixing plate and spaced apart from each other along the circumferential direction of the tubular container and in contact with the inner peripheral surface And the substrate is arranged such that the lateral end of the substrate is separated from the inner peripheral surface of the tubular container.

The lighting device according to a second aspect of the present invention is the lighting device according to the first aspect , wherein the fixing plate is fixed so that the ends of the two substrates face each other, one end is fixed to the fixing plate, and the other end It further comprises a substrate having a support member attached to the part.

Lighting device according to the third invention, the first invention or the second shot Oite bright, separation distance of separation distance or support members to each other and the fixed member and the support member is characterized by is 300mm or less.

A lighting device according to a fourth invention is characterized in that, in any one of the first to third inventions, the substrate is made of an epoxy resin and has a thickness of 1 mm to 2 mm.

In the first invention, the fixing member fixes one end of the rectangular substrate on which a plurality of LEDs are mounted to the end of the translucent tubular container. Supporting members attached to the other end portion of the substrate supports the substrate in the tubular container. The support member includes a fixing plate and a plurality of contact portions provided on the fixing plate, and the fixing plate has the other end of the substrate so that the central portion in the width direction of the substrate is disposed near the central axis of the tubular container. Fix the part. The contact piece part is abutted against the inner peripheral surface while being separated along the circumferential direction of the tubular container . The substrate is arranged such that the lateral end of the substrate is spaced from the inner peripheral surface of the tubular container. Since the width of the substrate is smaller than the inner diameter of the tubular container, when assembling the substrate by inserting it into the tubular container, there is no friction with the inner surface of the tubular container, and the assembly becomes easy. Further, one end portion of the substrate is fixed to one end portion of the tubular container, and the other end portion is not fixed to the other end portion of the tubular container, and is supported by the support member loosely mounted in the tubular container. Therefore, even if there is an error in the length of the substrate or the tubular container, the substrate can be fixed in the tubular container. Even if the length of the substrate differs depending on the number of LEDs to be mounted, the same tubular container should be used as long as the sum of the length of the substrate and the length of the support member is shorter than the length of the tubular container. Can do. The substrate is supported near the center of the tubular container to reduce the diameter of the tubular container.

In the second invention, a fixing plate is fixed to the other end portion of the substrate having one end portion fixed to one end portion of the tubular container, and the other end portions of the two substrates are opposed to the fixing plate. The substrate is fixed and a support member is attached to the other end of the other substrate. Thereby, two board | substrates can be connected in the said tubular container through the said fixed board, and the length is changed by connecting several same board | substrates.

In the third invention, the distance between the fixing member and the support member or the distance between the support members is set to 300 mm or less. For example, in the vicinity of an electric motor driven by an AC power supply of 60 Hz (4 poles, when the rotation speed is 1800 rpm), vibration of about 30 Hz occurs. When a tubular container is attached in the vicinity of the electric motor, the vibration generated by the electric motor is transmitted to the substrate, and when the separation dimension exceeds 300 mm, a resonance phenomenon may occur and damage the substrate or the LED mounted on the substrate. is there. By making the separation dimension 300 mm or less, the occurrence of a resonance phenomenon is suppressed.

In the fourth invention, the substrate is made of epoxy resin and has a thickness of 1 mm to 2 mm. When the thickness of the substrate is less than 1 mm, sufficient strength of the substrate cannot be ensured. In addition, when the thickness of the substrate exceeds 2 mm, the substrate becomes a custom-made product and the cost is increased, and the shape dimension of the support member that supports the substrate is increased, and the diameter of the tubular container is also increased. By setting the thickness of the substrate to 1 mm to 2 mm, it is possible to reduce the size while maintaining the strength of the substrate.

In the first invention, a fixing member for fixing one end of the substrate to the end of the tubular container, and a support member attached to the other end of the substrate and supporting the substrate in the tubular container are provided. The support member is provided on the fixing plate, the fixing plate to which the other end portion of the substrate is fixed so that the central portion in the width direction of the substrate is disposed in the vicinity of the central axis of the tubular container, and the tubular member A plurality of contact piece portions that are separated from each other along the circumferential direction of the container and abut against the inner peripheral surface are provided. Assembling can be facilitated as compared with the prior art by disposing the substrate by separating the lateral end of the substrate from the inner peripheral surface of the tubular container. In addition, since the other end of the substrate is supported without being fixed to the tubular container, the substrate is fixed in the tubular container even when there is an error in the length of the substrate or the tubular container. Can do. Further, even if the length of the substrate differs depending on the number of LEDs to be mounted, the same tubular container is used as long as the total length of the substrate and the length of the support member is shorter than the length of the tubular container. Can be used. Furthermore, by fixing one end portion of the substrate with a fixing member and supporting the other end portion with a support member, compared to a case where the substrate is held by a holding member having substantially the same dimension as the length of the substrate along the longitudinal direction of the substrate. It is possible to reduce the weight without requiring large parts. Further, the substrate can be supported near the center of the tubular container, and the diameter of the tubular container can be reduced to reduce the size.

In the second invention, the fixing plate is configured such that the end portions of the two substrates are fixed to face each other, one end portion is fixed to the fixing plate, and a support member is attached to the other end portion. By further providing a substrate, two substrates can be connected in the tubular container via the fixing plate, and a plurality of the same substrates can be connected to change the length.

In the third invention, when the distance between the fixing member and the support member or the distance between the support members is set to 300 mm or less, when used in a device or apparatus provided with a motor nearby, It is possible to prevent the vibration applied to the substrate from resonating.

In the fourth invention, the substrate is made of epoxy resin and has a thickness of 1 mm to 2 mm, so that the diameter of the tubular container can be reduced and the size can be reduced while maintaining the strength of the substrate. .

  Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof. FIG. 1 is a schematic front view of a lighting device according to the present invention, and FIG. 2 is a schematic plan view viewed from the line II-II in FIG. In the figure, reference numeral 1 denotes a cylindrical cylinder made of a transparent resin and having both ends opened. In the cylinder 1, a substrate 4 on which a plurality of LEDs 5, 5,.

  The substrate 4 is made of, for example, an epoxy resin (preferably made of glass-reinforced epoxy resin in order to increase the strength of the substrate 4), the length is shorter than the length of the cylinder 1, and the width is the inner diameter of the cylinder 1. It is smaller and the thickness is 1.0 mm to 2.0 mm, more preferably 1.6 mm. One end of the substrate 4 is fixed by a screw 9 to a disc-shaped end cap 2 made of the same material as the cylinder 1 and having substantially the same diameter as the cylinder 1, and the end cap 2 is one open end of the cylinder 1. It is fixed by heat fusion such as elastic adhesive or high frequency welder.

  At the other end of the substrate 4, a holder 3 made of the same material as that of the cylinder 1 is fixed by screws 9, and the holder 3 has three contact pieces as will be described later. The substrate 4 is supported by contacting the peripheral surface. Thereby, the side end of the substrate 4 in the width direction (short direction) is arranged away from the inner peripheral surface of the cylinder 1.

  The connector cap 6 has a disk shape made of the same material as the cylinder 1 and has substantially the same diameter as the cylinder 1, and a resin connector 7 is attached by a lock nut 8 with the connector cap 6 interposed therebetween. A connector cap 6 is fixed to the other opening end of the cylinder 1 by heat fusion such as an elastic adhesive or a high frequency welder. In the vicinity of the other end of the substrate 4, positive and negative power supply lines (not shown) for supplying power to the LEDs 5, 5... Are connected. It is connected to a DC power source (not shown).

  Since the end cap 2 and the connector cap 6 are fixed to the opening end of the cylinder 1 by heat fusion such as an elastic adhesive or a high frequency welder, the inside of the cylinder 1 can be sealed and the sealing performance is maintained. Can do. In particular, even when the lighting device is used in a place where a lot of dust or the like is present or in a high humidity environment, the surrounding dust and moisture do not enter the cylinder 1 and are not deteriorated in reliability. Can be used for a period.

  The separation dimension between the end cap 2 and the connector cap 6, more specifically, the separation dimension (distance between the mounting fulcrums) of the screws 9, 9 fixing both ends of the substrate 4 to the end cap 2 and the connector cap 6 is, for example, 350 mm or less, more preferably 300 mm or less. This is because when the distance between the mounting fulcrums of the substrate 4 exceeds 350 mm, a resonance phenomenon may occur due to vibration of 30 Hz or less, and in order to suppress the resonance phenomenon, the distance between the mounting fulcrums of the substrate 4 is 350 mm or less, more preferably 300 mm or less.

  The vibration of 30 Hz or less occurs, for example, when a four-pole motor driven at an alternating current of 60 Hz is rotated at a rotation speed of 1800 rpm. For this reason, when the lighting device is used in the vicinity where the electric motor is installed, vibration of about 30 Hz is transmitted to the substrate 4 and when the distance between the mounting fulcrums of the substrate 4 exceeds 350 mm, the amplitude of the substrate 4 is about 5 mm due to the resonance phenomenon. The parts such as the substrate 4 and the LED 5 are damaged. By setting the distance between the mounting fulcrums of the substrate 4 to 350 mm or less, more preferably 300 mm or less, it is possible to suppress the resonance phenomenon and prevent the components such as the substrate 4 and the LED 5 from being damaged.

  If the thickness of the substrate 4 is less than 1 mm, the strength of the substrate 4 may not be sufficiently secured. If the thickness of the substrate 4 exceeds 2 mm, the thickness of the substrate 4 increases. Therefore, there is a problem that the diameter of the cylinder 1 is increased and the lighting device is increased in size. For this reason, by setting the thickness of the substrate 4 to 1 mm to 2 mm, it is possible to reduce the size of the lighting device while maintaining the strength of the substrate 4.

  3 is a cross-sectional view taken along line III-III in FIG. As shown in the figure, the holder 3 is configured to come into contact at three locations on the inner peripheral surface (inner wall) of the cylinder 1, thereby supporting the substrate 4. Further, the end cap 2 and the holder 3 are arranged so that the central portion of the substrate 4 in the width direction is arranged near the center axis of the cylinder 1. Thereby, the board | substrate 4 can be supported in the center vicinity of the cylinder 1, the accommodation space of the board | substrate 4 in the cylinder 1 can be used effectively, and the diameter of the cylinder 1 can be made small.

  FIG. 4 is an external perspective view of the holder 3. The holder 3 has a fixed plate 31 that is fixed so that the ends of the two substrates 4 and 4 are opposed to each other, and has a width substantially the same as that of the substrate 4. A partition plate 34 having an appropriate length for partitioning the two substrates 4 and 4 is erected. The fixing plate 31 is provided with screw holes 33 and 33 for fixing the substrates 4 and 4 with the screws 9 and 9 with the partition plate 34 interposed therebetween.

  At both corners of the partition plate 34 opposite to the fixed plate 31, rod-like contact portions 32, 32 having substantially the same length as the fixed plate 31 are extended in parallel with the longitudinal direction of the fixed plate 31. . A rod-shaped contact piece having substantially the same length as the length of the fixing plate 31 along the longitudinal direction of the fixing plate 31 is provided at the center in the width direction of the surface opposite to the surface on which the partition plate 34 of the fixing plate 31 is provided. The part 35 is extended.

  When the holder 3 is inserted into the cylinder 1, each of the contact pieces 32, 32, and 35 is in contact with the outer peripheral surface of any two (or three) of the contact pieces 32, 32, and 35. Thus, the outer edges of the contact pieces 32, 32, 35 are arranged, and the holder 3 can be loosely mounted on the cylinder 1.

  More specifically, the positions of the outer edges of the contact pieces 32, 32, and 35 are equidistant from the center in the width direction of the substrate 4 in the radial direction of the cylinder 1 when the substrate 4 is fixed to the fixing plate 31. Contact pieces 32, 32, and 35 are provided so as to be. Further, the contact pieces 32, 32, and 35 are provided at equal intervals along the circumferential direction of the cylinder 1. Thereby, the board | substrate 4 can be supported by the center vicinity of the cylinder 1, the diameter of the cylinder 1 can be made small, and the shape of the whole illuminating device can be made thin and small. Further, the outer edge surface of the contact pieces 32, 32, 35 is formed in a curved shape so that the contact resistance between the holder 3 and the inner wall of the cylinder 1 when the holder 3 is inserted into the cylinder 1 is reduced. .

  FIG. 5 is an explanatory view showing a method of assembling the lighting device according to the present invention. As shown in FIGS. 5 (a) and 5 (b), the lighting device includes a substrate 4 on which LEDs 5, 5,... Are mounted, an end cap 2, a holder 3, a cylinder 1, a connector cap 6, a connector 7, a lock nut 8, It consists of screws 9, 9 and the like. In order to simplify the description, the power supply line connected to the substrate 4 is omitted.

  As shown in FIG. 5B, the end cap 2 is attached to one end of the substrate 4 with a screw 9, and the holder 3 is attached to the other end of the substrate 4 with a screw 9. A connector 7 is attached to the connector cap 6 with a lock nut 8.

  As shown in FIG. 5C, the connector cap 6 is fixed to the opening end of the cylinder 1 by heat fusion such as an elastic adhesive or a high frequency welder. As shown in FIG. 5D, the substrate 4 is inserted (relaxed) into the cylinder 1 and the end cap 2 is fixed to the opening end on the opposite side of the cylinder 1 by heat fusion such as an elastic adhesive or a high-frequency welder. .

  One end of the substrate 4 is fixed at one open end of the cylinder 1 with the end cap 2, and the other end of the substrate 4 is not fixed to the cylinder 1, but the contact pieces 32, 32, 35 is supported in the cylinder 1 by contacting the inner peripheral surface of the cylinder 1.

  Since the holder 3 is configured so that the ends of the two substrates 4 and 4 are fixed to face each other, the length of the cylinder 1 is changed so that the two or more substrates 4 and 4 are connected to the cylinder. 1 can also be arranged.

  FIG. 6 is a schematic diagram of the front side of the illumination device when two substrates 4 are arranged. As shown in the figure, one end of the first substrate 4 is fixed by an end cap 2 at one opening end of the cylinder 10, and a holder 3 is attached to the other end of the substrate 4. One end of the second substrate 4 is attached to the holder 3 so as to face the first substrate 4. A holder 3 is attached to the other end of the second substrate 4.

  Thus, the first and second substrates 4 and 4 connected by the holder 3 are fixed at one opening end of the cylinder 10 at one end and the contact piece portion 32 of the holder 3 at the other end and the central portion. 32 and 35 are supported in the cylinder 10 by contacting the inner peripheral surface of the cylinder 10. Also in this case, the separation dimension (distance between mounting fulcrums) of the screws 9 and 9 in which both ends of the substrates 4 and 4 are fixed with the end cap 2 and the connector cap 6 or the connector caps 6 and 6 is preferably 350 mm or less, for example. Is 300 mm or less. In addition, in the figure, although the case where the two board | substrates 4 and 4 were connected was demonstrated, three or more board | substrates can also be connected.

  As described above, in the present invention, one end of the substrate is fixed to the cylinder, the other end of the substrate is not fixed to the cylinder, a holder is attached, and the substrate is supported in the cylinder by this holder. In addition, by arranging the substrate with the side edge in the short direction of the substrate separated from the inner peripheral surface of the cylinder, for example, compared with the case where the edge of the substrate is fitted and fixed to the inner wall of the translucent tube Thus, the resistance when inserting the substrate can be reduced, and the assembly can be facilitated.

  In addition, since the other end of the substrate is not fixed to the cylinder but supported by the holder, even if there is an error in the length of the substrate or the length of the cylinder, the substrate is easily placed in the cylinder. be able to. Further, since one end of the substrate is fixed to the cylinder with an end cap, the substrate can be prevented from rotating in the cylinder, and the LED light can always be directed in a predetermined direction. In addition, when the lighting device is mounted inside an industrial device / equipment and used for lighting inside the device / equipment, the cylinder length may be determined depending on the space inside the device / equipment. In such a case, for example, even if it is necessary to change the length of the board by changing the number of LEDs to be mounted, if the board is shorter than the cylinder length, the board mounting structure is not changed. Can be easily placed in the cylinder.

  In addition, when one end of the substrate is fixed to the cylinder and a holder is attached to the other end of the substrate, for example, when the substrate is held by a holding member having substantially the same dimension as the length of the substrate along the longitudinal direction of the substrate. In comparison, the shape and size of the component that fixes or supports the substrate can be reduced, and the entire lighting device can be reduced in weight.

  In addition, since the holders can be fixed with the ends of the two substrates facing each other, the substrates can be easily connected with a simple structure, and the same parts can be obtained without preparing various parts in advance. Lighting devices having different lengths can be easily manufactured using a substrate and components, and a lighting device suitable for the application can be provided. In addition, since the other end of the substrate is not fixed to the cylinder, both ends of the cylinder can be sealed even when the cylinders have different lengths, and the airtightness can be maintained.

  In addition, the holder can be arranged near the center of the cylinder by providing a contact portion that contacts the inner wall of the cylinder from the front side of the board on which the LED is mounted and the back side of the board on which the LED is not mounted. In addition, it does not block the light projecting portion of the LED.

  In the above-described embodiment, the shape of the holder is an example, and is not limited to this. For example, the holder is configured to include three contact pieces, but may be configured to include four contact pieces.

  In the above-described embodiment, the cylinder has a circular cross section, but the cut shape is not limited to this, and a rectangular shape or an oval shape corresponds to the mounting structure of the device / equipment to which the lighting device is mounted. Other shapes such as a shape may be used.

  In the above-described embodiment, the LED mounting example is an example, and the present invention is not limited to this. For example, by mounting LEDs on both sides of the substrate, light can be projected over the entire circumference of the cylinder.

It is a front side schematic diagram of the illuminating device which concerns on this invention. It is the plane side schematic diagram seen from the II-II line | wire of FIG. It is the III-III line cross-sectional view of FIG. It is an external appearance perspective view of a holder. It is explanatory drawing which shows the assembly method of the illuminating device which concerns on this invention. It is a front side schematic diagram of the illuminating device at the time of arrange | positioning two board | substrates.

Explanation of symbols

1, 10 cylinder (tubular container)
2 End cap (fixing member)
3 Holder (support member)
4 Substrate 5 LED
6 Connector cap 7 Connector 8 Lock nut 9 Screw 31 Fixing plate 32, 35 Contact piece 33 Screw hole 34 Partition plate

Claims (4)

In a lighting device in which a rectangular substrate on which a plurality of LEDs are mounted is disposed in a translucent tubular container,
A fixing member for fixing one end of the substrate to the end of the tubular container;
Mounting et is the other end of the substrate, and a support member supporting the substrate in front Symbol tubular container,
The support member is
A fixing plate to which the other end portion of the substrate is fixed so that the central portion in the width direction of the substrate is disposed near the central axis of the tubular container;
A plurality of contact pieces provided on the fixing plate and spaced apart from each other in the circumferential direction of the tubular container and abutting on the inner peripheral surface;
With
The lighting device characterized in that the substrate is arranged with a lateral end of the substrate in a lateral direction being separated from an inner peripheral surface of the tubular container. The fixing plate is configured so that the ends of the two substrates are fixed to face each other,
The lighting device according to claim 1 , further comprising a substrate having one end fixed to the fixing plate and a support member attached to the other end. The lighting device according to claim 1 or 2 , wherein a distance between the fixing member and the support member or a distance between the support members is 300 mm or less. The lighting device according to any one of claims 1 to 3 , wherein the substrate is made of an epoxy resin and has a thickness of 1 mm to 2 mm.

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