JP6350213B2 - Electrical equipment and lighting equipment - Google Patents

Description

  Embodiments described herein relate generally to an electrical apparatus and a lighting device.

  Some conventional lighting devices and lighting fixtures for lighting use electrically connect a circuit board pattern to a lighting device case via a screw or the like in order to ground a lighting circuit.

JP 2012-028317 A

  However, in a lighting device that is grounded by electrically connecting a lighting circuit to the lighting device case via a screw, there is a possibility that grounding becomes invalid due to loosening of the screw. In addition, when the lighting circuit is grounded using a screw, there is a possibility that miniaturization of the circuit board and the lighting device may be hindered. Furthermore, when connecting the screw to the lighting device case, in the case of an inexpensive iron case, tapping or screwing with a nut is required, which may reduce workability. In some cases, tapping and screwing with a nut are unnecessary, but they are more expensive than an iron case.

  The problem to be solved by the present invention is to provide an electrical device and a lighting device capable of improving reliability and downsizing when a lighting circuit is grounded through a metal casing in which a lighting circuit board is housed. It is to be.

  An electrical device according to an embodiment includes a lighting circuit board on which a wiring pattern of a lighting circuit that controls lighting of a light source is formed; a conductor that is electrically connected to the wiring pattern by soldering; and the lighting circuit board is housed A metal piece provided on the metal case; and a connection part where the metal piece and the conductor are electrically connected. The lighting circuit includes the wiring pattern, It is characterized in that it is grounded through the conductor, the connecting portion, the metal piece and the metal casing.

  According to the present invention, when the lighting circuit is grounded through the metal casing in which the lighting circuit board is housed, the lighting circuit is grounded without using a screw, so that the reliability of the electrical apparatus and the lighting device is improved. And downsizing can be expected.

FIG. 1 is a block diagram illustrating the overall configuration of the lighting device 100 and the lighting device 200 according to the first embodiment. 2A is a perspective view of the lighting device 100 according to the first embodiment, and FIG. 2B is a plan view of the lighting device 100 according to the first embodiment. FIG. 3A is a cross-sectional view illustrating a grounding configuration of the lighting device 100 according to the first embodiment, and FIG. 3B is a plan view illustrating a grounding configuration of the lighting device 100 according to the first embodiment. FIG. 4 is a plan view illustrating a grounding configuration of the lighting device 101 according to the second embodiment. FIG. 5 is a plan view illustrating a grounding configuration of the lighting device 102 according to the third embodiment.

  (Embodiment 1) An electrical apparatus according to Embodiment 1 includes a lighting circuit board on which a wiring pattern of a lighting circuit that controls lighting of a light source is formed; and a conductive that is electrically connected to the wiring pattern by soldering. A metal case in which the lighting circuit board is housed; a metal piece provided in the metal case; and a connection part in which the metal piece and the conductor are electrically connected; The lighting circuit is grounded through the wiring pattern, the conductor, the connection portion, the metal piece, and the metal casing.

  (Second Embodiment) An electric device according to a second embodiment is characterized in that, in the electric device according to the first embodiment, the connecting portion is formed by soldering.

  (Third Embodiment) An illumination device according to a third embodiment has a light source; and the electric device according to the first or second embodiment.

  Each embodiment will be described below with reference to the drawings.

  The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between the parts, and the like are not necessarily the same as actual ones. Further, even when the same part is represented, the dimensions and ratios may be represented differently depending on the drawings.

  Note that, in the present specification and each drawing, the same elements as those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

FIG. 1 is a block diagram illustrating the overall configuration of the lighting device 100 and the lighting device 200 according to the first embodiment. 2A is a perspective view of the lighting device 100 according to the first embodiment, and FIG. 2B is a plan view of the lighting device 100 according to the first embodiment. 3A is a cross-sectional view showing a grounding configuration of the lighting device 100 according to the first embodiment, and FIG. 3B is a plan view showing a grounding configuration of the lighting device 100 according to the first embodiment.

  The lighting device 200 is connected to an external power source 9 such as an AC power source or a DC power source and supplied with power, and the lighting device 100 controls lighting of the light source 8. The light source 8 may be a fluorescent lamp or a discharge lamp, or a light emitting element such as an LED (light emitting diode) or an EL (Electro Luminescence). The light emitting element includes a light emitting diode, an organic EL, and an inorganic EL.

  As shown in FIG. 1, a lighting device 100 as an electric device includes a lighting circuit 1, an input terminal block 5, an output terminal block 6, and a ground terminal block 7. The lighting circuit 1 is supplied with electric power from the external power source 9 through the input terminal block 5, and the electric power supplied through the input terminal block 5 is converted into a current and voltage suitable for the light source 8 by the lighting circuit 1. It is converted and supplied from the lighting circuit 1 to the light source 8 via the output terminal block 6.

  The lighting circuit 1 has a lighting circuit board 3. The lighting circuit 1 includes a rectifier circuit, an AC / DC converter, a booster circuit, a step-down circuit, and the like (not shown). These circuits are formed by mounting electronic components on the lighting circuit board 3. On the lighting circuit board 3, a wiring pattern 2 that electrically connects each electronic component is formed of a metal such as copper. As the lighting circuit board 3, a glass epoxy board or the like may be used.

  As shown in FIG. 1, the wiring pattern 2 formed on the lighting circuit board 3 of the lighting circuit 1 is electrically connected to the ground terminal block 7, and the lighting circuit 1 is grounded via the ground terminal block 7. ing. The ground terminal block 7 may be formed integrally with the input terminal block 5 or the output terminal block 6 or may not be used. The lighting circuit 1 and the lighting circuit board 3 are entirely or partially covered with a metal casing 4. The wiring pattern 2 and the ground terminal block 7 are electrically connected to the metal housing 4.

  2A is a perspective view of the lighting device 100, and FIG. 2B is a plan view of the lighting device 100 as viewed from the B direction of FIG. 2A. As shown in FIGS. 2A and 2B, the metal housing 4 includes a lighting device cover 4a and a lighting device case 4b. The lighting device cover 4a covers a part of the lighting circuit board 3 and has cover end surfaces 4g on both end surfaces in the longitudinal direction. The lighting device cover 4a has a cover side surface 4e formed by bending in the longitudinal direction.

  The lighting device case 4 b covers the other surface of the lighting circuit board 3 and has a case bottom surface 4 c parallel to the other surface of the lighting circuit board 3. Further, the longitudinal direction of the case bottom surface 4c is bent so as to overlap the cover side surface 4e of the lighting device cover 4a to form a case side surface 4d.

  In FIG. 2, the ground terminal block 7 shown in FIG. 1 is provided integrally with the input terminal block 5 or the output terminal block 6.

  3A is a cross-sectional view showing a grounding configuration of the lighting device 100 in the AA cross section of FIG. 2B, and FIG. 3B is a B direction of FIGS. 2A and 3A. It is a top view which shows the earthing | grounding structure of the lighting device 100 seen from. In FIG. 3B, the lighting device cover 4a is omitted.

  As shown to Fig.3 (a), the metal piece 11 is provided in a part of case side 4d of the lighting device case 4b. The metal piece 11 is provided on the same plane as the lighting circuit board 3. The metal piece 11 is provided with a U-shaped cutout in a part of the case side surface 4d of the lighting device case 4b, and the cutout portion is perpendicular to the direction of the lighting device cover 4a and facing the lighting circuit board 3. It is formed by bending it.

  As shown in FIG. 3B, the metal piece 11 has a rectangular shape. On the plane on which the metal piece 11 and the lighting circuit board 3 are provided, the lighting circuit board 3 has a substrate recess 3 a formed in a portion facing the metal piece 11.

  A wiring pattern 2 is formed on the surface of the lighting circuit board 3 on the case bottom surface 4c side. The wiring pattern 2 is electrically connected to the electronic components of the lighting circuit 1. A land 2a is formed at an end of the wiring pattern 2, and the wiring pattern 2 and the land 2a are provided so as to face the metal piece 11 and the substrate recess 3a in the longitudinal direction of the lighting device 100. .

  The conductor 10 is electrically connected to the land 2a of the wiring pattern 2 by soldering. The conductor 10 is allowed to be a fine wire made of metal, for example, a jumper wire. The conductor 10 is provided on the surface of the metal piece 11 on the side of the lighting device cover 4 a and is electrically connected via the electrical connection portion 12. In FIG. 3B, both ends of the conductor 10 are electrically connected to the wiring pattern 2 by soldering, but only one side of the conductor 10 is electrically connected to the wiring pattern 2 by soldering. May be.

  The electrical connection part 12 is soldering. That is, the conductor 10 and the metal piece 11 are electrically connected by soldering. The electric connection part 12 may be formed by electric welding or laser welding.

  Moreover, it is appropriate that the length of the metal piece 11 in the longitudinal direction (a direction orthogonal to the AA direction in FIG. 3B) is 2 to 5 mm. If the width of the metal piece 11 is 2 mm or less, the contact area between the conductor 10 and the metal piece 11 is not sufficiently ensured in the electrical connection portion 12, so that the strength of soldering may be reduced and grounding may be invalidated. There is. Further, if the width of the metal piece 11 is 5 mm or more, the area of the metal piece 11 is increased, so that it takes time to form the electrical connection portion 12, and the manufacturability and assemblability of the lighting device 100 are lowered. There is a fear. That is, when the electrical connection part 12 is soldering, there is a possibility that the heating time increases or the power for heating increases. The same applies when the electrical connection portion 12 is formed by electric welding or laser welding.

  Therefore, since the lighting device case 4b (metal housing 4) is grounded via the ground terminal block 7, the lighting circuit 1 includes the wiring pattern 2 (land 2a), the conductor 10, the electrical connection portion 12, and the metal. Grounding is performed via the piece 11, the metal housing 4, and the ground terminal block 7.

  The effect of Example 1 is described.

  The lighting device 100 according to the first embodiment includes a conductor 10 electrically connected to the wiring pattern 2 or the land 2a by soldering, and a metal piece formed on the case side surface 4d (metal casing 4) of the lighting device case 4b. 11 is electrically connected to the wiring pattern 2 (land 2a), the conductor 10, the electrical connecting portion 12, the metal piece 11, and the metal housing 4 in this order to be grounded. Since the lighting circuit 1 is grounded without using a screw, the grounding is not invalidated by loosening the screw, the reliability of the lighting device 100 is improved, and the lighting device 100 is downsized. Can do.

  In the lighting device 100 of Example 1, since both ends of the conductor 10 are electrically connected to the wiring pattern 2 by soldering, a solder crack or the like is present at one of the connection portions between the conductor 10 and the wiring pattern 2. Even if it occurs, it can be grounded by the other connecting portion, so that the grounding is not invalidated and the reliability of the lighting device 100 can be improved.

  In the lighting device 100 according to the first embodiment, when the electrical connection portion 12 is formed by electric welding, welding is performed while the conductor 10 and the metal piece 11 are in contact with each other. The electrical connection with the piece 11 can be performed more reliably.

  In the lighting device 100 of the first embodiment, when the electrical connection portion 12 is formed by laser welding, the electrical connection between the conductor 10 and the metal piece 11 can be reliably performed even if the electrical connection portion 12 is small. Therefore, the size of the electrical connection portion 12 or the metal piece 11 can be reduced, and the lighting device 100 can be reduced in size.

  Since the metal piece 11 of the lighting device 100 of Example 1 has a length in the longitudinal direction of the lighting device 100 (a direction perpendicular to the AA direction in FIG. 3B) of 2 to 5 mm, the strength of soldering In addition, it is possible to prevent the grounding from becoming invalid without increasing the time and power required to form the electrical connection portion 12, and to improve the reliability, manufacturability, and assembly of the lighting device 100. Can be improved.

  A modification of the first embodiment will be described below.

  A groove portion for placing the conductor 10 may be provided on the surface of the metal piece 11 on the lighting device cover 4a side. Providing the groove on the metal piece 11 facilitates the positioning of the conductor 10 and increases the contact area between the metal piece 11 and the electrical connection portion 12. Reliability can be improved.

  In the lighting device 100 of the first embodiment, a plurality of electrical connection portions 12 may be provided. By providing a plurality of electrical connection portions 12, it is possible to suppress the grounding from becoming invalid and further improve the reliability of the lighting device 100.

  In the lighting device 100 according to the first embodiment, the electrical connection portion 12 may be formed from a thin metal wire such as a jumper wire and soldering. That is, the conductor 10 and the metal piece 11 may be electrically connected to a metal thin wire such as a jumper wire by soldering. The conductor 10 is soldered to a metal thin wire, and the metal thin wire is electrically connected to the metal piece 11 by soldering. With such a configuration, even if the positional relationship between the metal piece 11 and the substrate recess 3a is deviated, the stress applied to the conductor 10 and the metal piece 11 by the metal thin wire is reduced, so that the grounding becomes invalid. The reliability of the lighting device 100 can be further improved.

FIG. 4 is a plan view showing a grounding configuration of the lighting device 101 according to the second embodiment when viewed from the direction B in FIG. In FIG. 4, the lighting device cover 4a is omitted. As shown in FIG. 4, the lighting device 101 includes conductors 10 and 10a. That is, it has a plurality of conductors. Moreover, the lighting device 101 has electrical connection portions 12 and 12a for electrically connecting the metal pieces 11 to the conductors 10 and 10a, respectively. The conductors 10 and 10a are electrically connected to different wiring patterns 2 and lands 2a by soldering. Therefore, the lighting device 101 has a plurality of conductors and electrical connection portions.

  The conductors 10 and 10a of the lighting device 101 have different lengths. By making the lengths of the conductors different from each other, the lands 2a to which the conductors are electrically connected by soldering do not interfere with each other, and the distance between the conductors in the direction orthogonal to the longitudinal direction is reduced. be able to. Since the distance between the conductors can be reduced, the size in the direction orthogonal to the longitudinal direction of the metal piece 11 can be reduced, and the lighting circuit board 3 can be reduced in size. Or the part which mounts the electronic component of the lighting circuit 1 in the lighting circuit board 3 can be increased.

  Since the lighting device 101 according to the second embodiment includes a plurality of conductors and electrical connection portions, it is possible to suppress the grounding from becoming invalid and further improve the reliability of the lighting device 101.

  Since the lighting device 101 according to the second embodiment has different conductor lengths, the lighting circuit board 3 and the lighting device 101 can be reduced in size while suppressing the grounding from becoming invalid.

  Since the lighting device 101 according to the second embodiment has different conductor lengths, it is possible to increase the number of parts for mounting the electronic components of the lighting circuit 1 while suppressing the grounding from becoming invalid.

  A modification of the second embodiment will be described below.

  In the lighting device 101 of the second embodiment, a plurality of metal pieces 11 may be provided. By providing a plurality of conductors and metal pieces, the number of electrical connection portions 12 is increased, so that the grounding is prevented from being invalidated, and the reliability of the lighting device 101 can be further improved.

  A groove portion for placing the conductor 10 may be provided on the surface of the metal piece 11 on the lighting device cover 4a side. Providing the groove on the metal piece 11 facilitates the positioning of the conductor 10 and increases the contact area between the metal piece 11 and the electrical connection portion 12. Reliability can be improved.

FIG. 5 is a plan view of the grounding configuration of the lighting device 102 according to the third embodiment when viewed from the direction B in FIG. In FIG. 5, the lighting device cover 4a is omitted. As shown in FIG. 5, the metal piece 11 of the lighting device 102 includes a first metal piece 11 a having a relatively long length in the longitudinal direction of the lighting device 102 and a second metal piece 11 b having a relatively small length. Have.

  The wiring pattern 2 and the land 2a are provided in the longitudinal direction of the lighting device 102 so as to face the first metal piece 11a, the second metal piece 11b, and the substrate recess 3a. The conductor 10 and the first metal piece 11a are electrically connected by soldering. The electric connection part 12 may be formed by electric welding or laser welding.

  The length of the first metal piece 11a in the longitudinal direction is suitably 2 to 5 mm. When the width of the first metal piece 11a is 2 mm or less, the contact area between the conductor 10 and the first metal piece 11a is not sufficiently ensured in the electrical connection portion 12, so that the soldering strength is reduced and the grounding is performed. May become invalid. Further, if the width of the first metal piece 11a is 5 mm or more, the area of the first metal piece 11a is increased, so that it takes time to form the electrical connection portion 12, and the manufacturability and assembly of the lighting device 102 are increased. There is a risk of reducing the performance. That is, when the electrical connection part 12 is soldering, there is a possibility that the heating time increases or the power for heating increases. The same applies when the electrical connection portion 12 is formed by electric welding or laser welding.

  Therefore, since the lighting device case 4b (metal casing 4) is grounded via the ground terminal block 7, the lighting circuit 1 includes the wiring pattern 2 (land 2a), the conductor 10, the electrical connecting portion 12, The first metal piece 11a, the second metal piece 11b, the metal housing 4 and the ground terminal block 7 are grounded.

  The effect of Example 3 is described.

  Since the lighting device 102 according to the third embodiment includes the second metal piece 11b in the metal piece 11 that is relatively smaller in length in the longitudinal direction of the lighting device 102 than the first metal piece 11a in which the electrical connection portion 12 is provided. When the electrical connection portion 12 is formed, the stress when the soldering iron or the welding electrode is pressed can be reduced, and the influence on the lighting circuit board 3, such as the stress, can be reduced.

  A modification of the third embodiment will be described below.

  A groove for placing the conductor 10 may be provided on the surface of the first metal piece 11a on the lighting device cover 4a side. Providing the groove on the first metal piece 11a facilitates positioning of the conductor 10, and increases the contact area between the first metal piece 11a and the electrical connection portion 12, thereby suppressing the grounding from becoming invalid. The reliability of the lighting device 102 can be improved.

  The first metal piece 11a is allowed to be not only rectangular but also polygonal or circular. When the first metal piece 11a is circular and the electrical connection portion 12 is soldered, the solder is uniformly applied to the first metal piece 11a. Moreover, since the area of the corner | angular part of the 1st metal piece 11a reduces compared with the case where the 1st metal piece 11a is a rectangular shape when the 1st metal piece 11a is a polygonal shape, the 1st metal piece 11a While ensuring the contact area between the piece 11a and the electrical connection portion 12, the overall area of the first metal piece 11a can be reduced, and the time and power required to form the electrical connection portion 12 can be suppressed, Ineffective grounding can be suppressed, and the reliability, manufacturability, and assembly of the lighting device 100 can be improved.

  Although several embodiments of the present invention have been described, these embodiments or examples are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments or examples can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments or examples and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Lighting circuit 2 ... Wiring pattern 3 ... Lighting circuit board 4 ... Metal housing 8 ... Light source 10 ... Conductor 11 ... Metal piece 12 ... Electrical connection part (connection part)
100, 101, 102 ... Lighting device (electric equipment)
200: Illumination device

Claims (3)

A lighting circuit board on which a wiring pattern of a lighting circuit for controlling lighting of the light source is formed;
A conductor electrically connected to the wiring pattern by soldering;
A metal housing in which the lighting circuit board is housed;
A metal piece in which a part of the metal casing is formed to protrude in the direction of the lighting circuit board ;
A connecting portion for electrically connecting the metal piece and the conductor;
Comprising
The lighting device is grounded via the wiring pattern, the conductor, the connection portion, the metal piece, and the metal casing.   The electrical device according to claim 1, wherein the connection portion is formed by soldering. With a light source;
An electrical device according to claim 1 or 2;
An illumination device comprising:

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