JP5419422B2 - Electronic components, circuit boards for mounting electronic components, and lighting fixtures using circuit boards - Google Patents

Description

  The present invention relates to an electronic component mounted using an automatic mounting machine, a circuit board on which the electronic component is mounted, and a lighting apparatus using the circuit board.

  In recent years, for example, in an electrical product such as a lighting device, it is desired to reduce the size of the product itself. In connection with this, the mounting area of an electronic component is reduced (for example, refer patent document 1 and patent document 2).

  In the lighting device described in Patent Document 1, a circuit board on which an electrical component such as a capacitor and a transformer or choke as a boosting or current limiting element are mounted is housed in a metal case 20. A mounting space was provided below the transformer or choke on the circuit board, and electrical components were mounted in this mounting space.

Moreover, in the transformer which is an electrical component described in Patent Document 2, the connecting terminal arrangement direction of the coil and the central axis of the winding wound around the bobbin are configured at a horizontal angle. This reduced the width while maintaining the size of the bobbin and the magnetic core.
Japanese Patent Laid-Open No. 9-298011 JP 2000-12356 A

  Incidentally, FIG. 6 shows a choke coil 100 which is an electronic component of a power conversion circuit that has been conventionally used in lighting devices and the like. In the choke coil 100, a bobbin 103 around which a winding wire 102 is wound and a core 104 made of a magnetic material are mounted in combination on the upper surface of a component substrate 101. Further, a plurality of connection terminals 105 are planted on the lower surface of the component substrate 101 so as to protrude downward. Each of them is generally arranged on the object with respect to the center of the component substrate 101.

  When such a choke coil 100 or transformer is mounted on the circuit board 107 (see FIG. 7), automatic mounting using taping packaging as seen in other components such as small capacitors and resistors cannot be performed. In order to perform automatic mounting, it is common to perform mounting by a robot using a dedicated chuck jig adapted to the shape.

That is, in the mounting by the robot, first, as shown in FIG. 7A, the outside of the component substrate 101 of the choke coil 100 is grasped by the chuck 106 connected to the robot, and as shown in FIG. As shown in FIG. 7C, the choke coil 100 is lowered and the chuck 106 is removed.
At this time, the chuck portion 108 shown in FIG. 6B is provided, and the chuck 106 of the robot is caught in this portion and sandwiched from both sides, whereby the choke coil 100 is held and automatic mounting is performed.

In this case, as the mounting area of the choke coil 100, as shown in FIG. 7C, in addition to the outer size of the choke coil 100, a space CS that allows the chuck 106 to move around is necessary. The circuit board 107 must be designed in consideration of the above.
That is, in order to perform automatic mounting, as shown in FIG. 8, there is a problem that an extra dead space DS is required around the choke coil 100, and it is difficult to reduce the mounting area.

  The present invention has been made to solve the conventional problems, and provides an electronic component that can be reduced in size by reducing the mounting area, a circuit board on which the electronic component is mounted, and a lighting device using the circuit board. The purpose is to do.

The electronic component of the present invention is an electronic component having a component substrate on which one side has an electronic component element mounted and a connection terminal is implanted on the other surface, and the component substrate has the electronic component element on the upper surface. A substantially rectangular flat plate-like upper component board, and the connection terminal protrudes from the lower surface , is shorter than the upper component board in the width direction, and is substantially rectangular flat plate-like lower component board, and the constructed by integrated with, the lower component substrate, said in the longitudinal direction, with protruding front and rear sides from the upper component substrate, Contact Keru end on at least one side of the width direction, the upper has a projecting portion located inside the end portion of the component substrate, the electronic component, when mounted on the circuit board, both ends of the width direction of the protruding portion by a chuck of an automatic mounting machine is gripped is, you to the extended portion The position of the end portion on at least one side in the width direction is such that the chuck of the automatic mounting machine that grips the end portion on the at least one side in the width direction of the overhang portion is the end portion of the upper component substrate. Is set so as not to protrude in the width direction .

  With this configuration, the component substrate of the electronic component is integrally formed of the upper component substrate and the lower component substrate, and the lower component substrate is formed with protruding portions that protrude from the upper component substrate on both the front and rear sides in the length direction. And the width direction edge part of the overhang | projection part was made into the inner side from the edge part of an upper component board | substrate. For this reason, when the width direction edge part of an electronic component is gripped using an automatic mounting machine, the mounting machine does not protrude in at least one of the width directions of the electronic component. For this reason, it is not necessary to provide a space for a mounting machine between adjacent electronic components, and the mounting area can be reduced and the size can be reduced.

  The circuit board of the present invention has a configuration in which the above-described electronic component is mounted.

  With this configuration, by using the above-described electronic component, it is not necessary to provide a space for a mounting machine between adjacent electronic components, and the mounting area can be reduced and the circuit board can be reduced in size.

  Furthermore, the lighting fixture of this invention has the structure using the circuit board mentioned above.

  With this configuration, the lighting fixture can be reduced in size by using the circuit board described above.

  According to the present invention, the component substrate of the electronic component is integrally constituted by the upper component substrate and the lower component substrate, and the lower component substrate is formed with protruding portions protruding from the upper component substrate on both the front and rear sides in the length direction. And the width direction edge part of the overhang | projection part was made into the inner side from the edge part of an upper component board | substrate. For this reason, when the width direction edge part of an electronic component is gripped using an automatic mounting machine, the mounting machine does not protrude in at least one of the width directions of the electronic component. For this reason, it is not necessary to provide a space for a mounting machine between adjacent electronic components, and an electronic component having an effect that the mounting area can be reduced and the size can be reduced, a circuit board on which the electronic component is mounted, and a circuit board It is possible to provide a lighting fixture using the above.

(First embodiment)
Hereinafter, an electronic component according to an embodiment of the present invention, a circuit board on which the electronic component is mounted, and a lighting fixture using the circuit board will be described with reference to the drawings.
FIG. 1A is a side view showing an electronic component according to the first embodiment of the present invention, FIG. 1B is a plan view, and FIG. 2 is a plan view showing a space when the electronic component is held by a chuck. FIGS. 3A to 3C are process diagrams showing an operation of mounting an electronic component on a circuit board by an automatic mounting machine.

  As shown in FIG. 1, in the choke coil 10 as the electronic component according to the first embodiment of the present invention, an upper component substrate 21 and a lower component substrate 22 are integrated to form a substantially rectangular flat component substrate 20. ing. On an upper surface 211 as one surface of the upper component substrate 21, an electronic component element 14 in which a winding wire 12 wound around a bobbin 11 and a core 13 that is a magnetic material are combined is mounted. A plurality of connection terminals 23 are planted on the lower surface 221 that is the other surface of the lower component substrate 22.

  The lower component substrate 22 has a protruding portion 222 protruding from the upper component substrate 21 on both the front and rear sides in the length direction, and the protruding portion 222 is on the upper component substrate 21 on at least one side (here, the right side) in the width direction. An end portion 223 is provided inside the end portion 212.

  That is, the upper component substrate 21 is narrower and longer than the lower component substrate 22. For this reason, when the choke coil 10 is gripped by the chuck 16 of the automatic mounting machine, the four corners of the lower component substrate 22 become the chuck parts CS (CSR) as shown in FIG. On the other hand, it has an asymmetric structure in which the core 13 and the winding 12 are moved to one side (here, the right side).

  Next, the operation of mounting the above-described choke coil 10 on the circuit board 15 using an automatic mounting machine will be described.

  First, as shown in FIG. 3A, the chucks 16, 16 are moved to the upper part of the choke coil 10 in a state where the distance between the left and right chucks 16, 16 is wider than the width of the lower component substrate 22 of the choke coil 10. . At this time, since the right end portion of the lower component substrate 22 is located inside the right end portion of the upper component substrate 21, the right chuck 16 is located inside the right end portion of the outer shape of the choke coil 10. Yes. That is, the right chuck 16 does not protrude in the width direction from the outer shape of the choke coil 10.

  Next, as shown in FIG. 3 (b), the left and right chucks 16, 16 are lowered to hold the lower component substrate 22 of the choke coil 10 from both sides, and lifted in this state from the component tray (not shown). Take out.

  Then, as shown in FIG. 3C, after moving to a predetermined position on the circuit board 15, the choke coil 10 is placed on the circuit board 15, and then the gap between the chucks 16 and 16 is increased to increase the choke coil. Release 10

As described above, according to the choke coil 10 according to the first embodiment described above, the component substrate 20 of the choke coil 10 is integrally configured by the upper component substrate 21 and the lower component substrate 22, and the lower component substrate 22 has a length direction. Overhang portions 222 protruding from the upper component substrate 21 were formed on both the front and rear sides. The end portion 223 in the width direction of the overhang portion 222 is set inside the end portion 212 of the upper component substrate 21. For this reason, when gripping the width direction end of the choke coil 10 using the chuck 16 of the automatic mounting machine, the chuck 16 does not protrude in the width direction on the right side of the choke coil 10.
That is, as shown in FIG. 2, since it is not necessary to provide the right chuck space CSR outside the choke coil 10, it is not necessary to provide the chuck 16 space CSR and dead space DS between adjacent electronic components. The mounting area can be reduced and the electronic component 10 can be downsized.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
FIG. 4 is a circuit diagram showing an example of printed circuit board design when a choke coil is used, and FIG. 5 is an explanatory diagram showing an example of component arrangement on the circuit board. In addition, the same code | symbol is attached | subjected to the site | part which is common with the electronic component concerning 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

As shown in FIG. 4, the circuit board 15 according to the second embodiment of the present invention is a discharge lamp lighting device 30 configured by the choke coil 10 and other components described above.
The discharge lamp lighting device 30 rectifies the commercial power supply 31 with a rectifier 32, and then boosts it with a boost chopper circuit 33 and smoothes it with a smoothing capacitor 34 to convert it into a DC power supply. The direct current power thus generated is converted into a high-frequency output by a half-bridge inverter circuit (hereinafter referred to as “inverter circuit”) 35, and a discharge lamp 36 as a load is turned on.

In general, the boost chopper circuit 33 and the inverter circuit 35 are operated at a high frequency of several tens of kHz.
Therefore, the chopper FET 37 constituting the boost chopper circuit 33 and the inverter FET 38 constituting the inverter circuit 35 are repeatedly switched at several tens of kHz, and high-frequency switching noise is generated. The generated noise is emitted as so-called radiation noise, which may affect other electronic devices.

  In general, it is known that the magnitude of the radiation noise changes depending on the wiring design of the high-frequency current on the circuit board 15, and reducing the range in which the high-frequency current flows on the circuit board 15 is effective in reducing the noise. It is.

Loop 1 and loop 2 in FIG. 4 show examples of paths through which this high-frequency current flows.
Therefore, in such a discharge lamp lighting device 30, it is desirable to design a printed circuit board so that the wiring range of the high frequency loop 1 and the loop 2 is as small as possible.
For this reason, it is desirable to narrow the range of the loop 1 and the loop 2 by arranging the smoothing capacitor 34 between the chopper choke 39 and the ballast choke 41.

  That is, as shown in FIG. 5, the chopper choke 39 and the ballast choke 41 are made of the structure of the choke coil 10 according to the first embodiment, and the side on which the core 13 and the winding wire 12 are approached faces the smoothing capacitor 34. Arrange so that. Thereby, the chopper choke 39 and the ballast choke 41 can be disposed close to each other using the chuck 16 of the automatic mounting machine.

As described above, according to the circuit board according to the second embodiment described above, the loop 1 and the loop 2 in FIG. 4 can be reduced, and noise can be reduced by reducing the high-frequency loop.
Further, by arranging the chopper choke 39 and the ballast choke 41 close to each other, the mounting area can be saved by the area of the space SS in FIG. 5, and the size of the circuit board 15 can be reduced. .

  Furthermore, by using the circuit board 15 described above for a lighting fixture, it is possible to reduce the size of the lighting fixture and reduce noise.

  The electronic component of the present invention, the circuit board on which the electronic component is mounted, and the lighting fixture using the circuit board are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

(A) is a side view which shows the electronic component concerning 1st Embodiment of this invention, (b) is a top view Plan view showing the space for gripping electronic components with a chuck (A)-(c) is process drawing which shows the operation | movement which mounts an electronic component on a circuit board by an automatic mounting machine. Circuit diagram showing an example of printed circuit board design using a choke coil Explanatory drawing showing an example of component placement on a circuit board (A) is a side view showing a conventional electronic component, (b) is a plan view (A)-(c) is process drawing which shows the operation | movement which mounts the conventional electronic component on a circuit board with an automatic mounting machine. Plan view showing the space for gripping electronic components with a chuck

Explanation of symbols

10 Choke coil (electronic parts)
14 Electronic component element 15 Circuit board 16 Chuck (automatic mounting machine)
20 Component substrate 21 Upper component substrate 211 Upper surface (one surface)
212 End of upper component substrate 22 Lower component substrate 221 Lower surface (the other surface)
222 Overhang 223 End 23 Connection terminal

Claims (3)

An electronic component having a component substrate in which an electronic component element is mounted on one surface and a connection terminal is implanted on the other surface,
The component board has a substantially rectangular flat plate-shaped upper part board on which the electronic component element is mounted on the upper surface, and the connection terminals project from the lower surface, and are shorter in the width direction than the upper component board in the length direction. a lower component substrate of long substantially rectangular flat plate shape, a is constructed by integrated with,
The lower part substrate, in said length direction, the protruding front and rear sides from the upper component substrate, Contact Keru end on at least one side of the width direction, the inner side than the end portion of the upper component substrate Having an overhang located ,
The electronic component, when mounted on the circuit board, both ends of the width direction of the protruding portion is grasped by the chuck of the automatic mounting machine,
The position of the end portion on at least one side in the width direction of the overhanging portion is such that the chuck of the automatic mounting machine that holds the end portion on at least one side in the width direction of the overhanging portion is the upper part. from the end portion of the substrate that are set so as not to protrude in the width direction,
An electronic component characterized by that.   A circuit board on which the electronic component according to claim 1 is mounted.   A lighting apparatus comprising the circuit board according to claim 2.

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