JP6883776B2 - Circuit boards and electrical equipment - Google Patents

Description

The present invention relates to a circuit board and an electric device using the same.

A configuration is known in which an electric wire connected to a circuit board is pulled out to the outside of the electric device in order to supply electric power to the circuit board provided inside the electric device from the outside. In such a configuration, a tension-stopping structure has been proposed that relieves the load on the connection portion between the substrate and the electric wire when tension is applied to the electric wire (see, for example, Patent Document 1).

Jikkenhei 2-21787

In the tension-stopping structure described in Patent Document 1, it is necessary to insert one electric wire into a plurality of through holes in an S-shape, and there is a problem that the space required for the tension-stopping structure is large.

The present invention provides a circuit board and an electric device capable of reducing the load on the connection portion between the substrate and the electric wire in a small space.

The circuit board according to one aspect of the present invention includes a circuit component, a substrate on which the circuit component is mounted and an opening is formed, a first electric wire whose one end is connected to the substrate, and the above. A connection structure that connects a second electric wire thicker than the first electric wire, the other end of the first electric wire, and one end of the second electric wire passed through the opening. The connecting structure is hooked on the edge of the opening.

An electrical device according to an aspect of the present invention includes the circuit board and a support member that supports the edge of the opening of the board from the side opposite to the connection structure.

The circuit board and electrical equipment of the present invention can reduce the load on the connection portion between the board and the electric wire in a small space.

FIG. 1 is an external perspective view of an illumination light source including the circuit board according to the first embodiment as viewed from above. FIG. 2 is an external perspective view of an illumination light source including the circuit board according to the first embodiment as viewed from below. FIG. 3 is an exploded perspective view of an illumination light source including the circuit board according to the first embodiment. FIG. 4 is an external perspective view of the circuit board according to the first embodiment. FIG. 5 is an external perspective view of the circuit board with the electric wires removed. FIG. 6 is a schematic cross-sectional view of a portion of the circuit board according to the first embodiment related to the electric wire. FIG. 7 is a first diagram for explaining the structure of the connection structure. FIG. 8 is a second diagram for explaining the structure of the connection structure. FIG. 9 is an external perspective view of the housing. FIG. 10 is a diagram showing an example of an opening through which two second electric wires are passed. FIG. 11 is a diagram showing an example of an opening formed in a notch shape. FIG. 12 is a perspective view of the lighting device according to the second embodiment. FIG. 13 is a perspective view of another lighting device according to the second embodiment.

Hereinafter, embodiments will be specifically described with reference to the drawings. It should be noted that all of the embodiments described below show comprehensive or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

It should be noted that each figure is a schematic view and is not necessarily exactly illustrated. Further, in each figure, substantially the same configuration is designated by the same reference numerals, and duplicate description may be omitted or simplified.

In the drawings of the following embodiments, the Z-axis direction is, for example, the vertical direction (vertical direction), and the Z-axis + side may be described as an upper side or a light emitting side. Further, the Z-axis-side may be described as the lower side. Further, the X-axis direction and the Y-axis direction are directions orthogonal to each other on a plane (horizontal plane) perpendicular to the Z-axis. Further, in the following embodiments, the plan view is viewed from the Z-axis direction.

(Embodiment 1)
[Construction of light source for lighting]
Hereinafter, the configuration of the circuit board according to the first embodiment and the illumination light source including the circuit board will be described. First, the illumination light source including the circuit board according to the first embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is an external perspective view of an illumination light source including the circuit board according to the first embodiment as viewed from above. FIG. 2 is an external perspective view of an illumination light source including the circuit board according to the first embodiment as viewed from below. FIG. 3 is an exploded perspective view of an illumination light source including the circuit board according to the first embodiment. In FIG. 3, the fixing members such as screws for fixing the members are not shown.

As shown in FIGS. 1 to 3, the lighting light source 10 is, for example, a lighting light source used in a lighting device such as a downlight or a spotlight, and is an example of an electric device. The illumination light source 10 includes a translucent panel 11, a housing 12, a base 13, a reflection member 14, a seal member 15, a circuit board 16, a light emitting module 17, an inspection seal member 18a, and the like. A seal member 18b for electric wires and a seal member 19 are provided.

The translucent panel 11 is an optical member made of a translucent material in order to take out the light emitted by the light emitting module 17 to the outside. Specifically, the translucent panel 11 is a cap-shaped (lid-shaped) optical member. The plan view shape of the translucent panel 11 is a circular shape (substantially circular shape) in which a part is cut out from the outer peripheral side.

The translucent panel 11 may have specific optical characteristics such as functioning as a Fresnel lens. Further, the translucent panel 11 may be provided with dimples for suppressing unevenness of light emitted from the translucent panel 11. In this case, the dimples are provided, for example, on the light emitting side surface (light emitting surface) of the translucent panel 11.

At the peripheral edge of the light emitting surface of the translucent panel 11, there are 3 screw holes 11b through which fixing screws (not shown) for collectively fixing the translucent panel 11, the housing 12, and the base 13 are inserted. There will be one. Further, three groove portions 11d are provided on the side surface (side portion) of the translucent panel 11. The groove portion 11d forms a groove extending in the Z-axis direction together with the groove portion 12f described later. The formed groove is a groove for connecting the lighting light source 10 to the lighting device by a connecting screw (not shown).

The translucent panel 11 is arranged on the light emitting side of the housing 12 so as to close the exit port of the reflecting member 14. Further, the translucent panel 11 is arranged in a direction in which the light emitting module 17 emits light, and the translucent panel 11 and the light emitting unit 17b face each other. The translucent panel 11 is formed of, for example, a resin material such as acrylic (PMMA: Polymethyl Methacrylate) or polycarbonate (PC: Polycarbonate).

The translucent panel 11 may not have light diffusivity or may have light diffusivity. For example, a milky white light diffusing film is formed by applying a resin containing a light diffusing material such as silica or calcium carbonate, or a white pigment or the like to the inner surface of the translucent panel 11, and the light transmitting function has a light diffusing function. The sex panel 11 can be configured. Further, by forming minute irregularities on the translucent panel 11, the translucent panel 11 having a light diffusing function can be configured.

The housing 12 is a substantially cylindrical member that houses the light emitting module 17 and the circuit board 16. The housing 12 has a first opening formed on the light emitting side and a second opening formed on the side opposite to the light emitting side. An incident port portion of the reflective member 14 is arranged in the first opening, and a base 13 is arranged in the second opening.

Three fixing portions 12a (bosses) having screw holes 12b are provided on the inner surface of the housing 12. A fixing screw is inserted into the screw hole 12b. On the outer surface of the housing 12, three groove portions 12f forming a groove together with the above-mentioned groove portion 11d are provided.

At the end on the Z-axis side of the side portion of the housing 12, three notches 12h for positioning into which the fixing portion 13a of the base 13 is fitted are provided. The notch 12h is a positioning structure of the base 13 with respect to the housing 12 provided in the housing 12. Further, at the end on the Z-axis side of the side portion of the housing 12, there is also a notch 12i for passing the second electric wire 22a and the second electric wire 22b for electrically connecting the circuit board 16 and the external power supply. It will be provided.

The housing 12 is made of, for example, an insulating resin material such as polybutylene terephthalate (PBT). The housing 12 may be made of metal instead of resin.

The outer shape of each of the reflective member 14, the sealing member 15, and the circuit board 16 (board 16a) described below in a plan view has a shape cut out according to the fixed portion 12a and the groove portion 12f. Become.

The base 13 has a support column 13d projecting to the Z-axis + side, and the support column 13d supports the light emitting module 17 from the rear when the light emitting module 17 emits light forward. The base 13 is a member that also functions as a heat sink that dissipates heat generated by the light emitting module 17, and is a substantially circular plate-shaped member except for the fixing portion 13a and the support column 13d.

Three fixing portions 13a having screw holes 13b are provided on the peripheral portion of the main surface of the base 13 on the Z-axis + side. The inner peripheral surface of the screw hole 13b is threaded corresponding to the fixing screw. The fixed portion 13a is a convex portion protruding toward the Z-axis + side from the main surface of the base 13 on the Z-axis + side, and is fitted into the notch 12h.

Three connection holes 13c through which connecting screws for connecting the lighting light source 10 to the lighting device are inserted are provided in the peripheral portion of the base 13. Further, at the end of the base 13, a notch 13e for passing a second electric wire 22a for electrically connecting the circuit board 16 and an external power source and a second electric wire 22b is provided.

Specifically, the base 13 is made of a metal material such as aluminum or a resin material having high thermal conductivity.

The reflection member 14 is a member having a reflection function, and has an entrance port which is an opening into which the light of the light emitting module 17 is incident, and an exit port which is an opening in which the light incident from the incident port is emitted. The reflective member 14 is a tubular member having an inner diameter that gradually increases from the entrance port to the exit port.

The incident port portion of the reflection member 14 is configured to surround the light emitting portion 17b of the light emitting module 17. The shape of the exit port corresponds to the shape of the light emission surface (Z-axis + side surface) of the translucent panel 11.

The inner surface of the reflective member 14 is a reflective surface that reflects the light emitted by the light emitting module 17. The reflecting surface is configured to reflect the light incident from the incident port and emit it from the exit port. That is, the light emitted by the light emitting module 17 by the reflecting member 14 is guided to the translucent panel 11. The reflective member 14 is attached to the housing 12.

The reflective member 14 is made of, for example, a hard white resin material having an insulating property. In order to improve the appearance of the reflective surface and control the light distribution of the lighting light source 10, the inner surface of the resin reflective member 14 is a metal vapor deposition film (metal) made of a metal material such as silver or aluminum. It may be coated with a reflective film). Further, the reflective member 14 may be formed by using a metal material having a higher reflectance than the resin material, such as aluminum.

The seal member 15 is a deformable ring-shaped resin member having elasticity. Specifically, the sealing member 15 is made of rubber, an elastomer, or the like. The seal member 15 is sandwiched between the translucent panel 11 and the housing 12. Specifically, the sealing member 15 has the end face of the translucent panel 11 and the first opening of the housing 12 by fixing the translucent panel 11 and the housing 12 by tightening the fixing screws. It is sandwiched between the end face on the side. That is, the sealing member 15 seals between the end surface of the translucent panel 11 and the end surface of the housing 12 on the first opening side.

Further, the seal member 15 surrounds the reflective member 14 from the outside, and the inner peripheral surface abuts on the outer surface of the reflective member 14. The reflective member 14 functions as a guide (positioning structure) for arranging the seal member 15 between the end surface of the translucent panel 11 and the end surface of the housing 12 on the first opening side.

The light emitting module 17 is a light emitting device that emits light of a predetermined color (wavelength) such as white by the electric power supplied from the drive circuit mounted on the substrate 16a. The light emitted from the light emitting module 17 passes through the translucent panel 11 and is emitted to the outside of the illumination light source 10. The circuit board 16 and the light emitting module 17 are electrically connected by a cable or the like provided with a connector at the end.

The holder 17a is a resin member that holds the light emitting portion 17b, and the light emitting module 17 is attached to the base 13 by screwing the holder 17a to the support column 13d.

The light emitting unit 17b is a light emitting unit having a COB (Chip On Board) structure in which an LED (light emitting element) is directly mounted on a substrate and the LED is sealed by a sealing member. Although not shown, the lower surface of the substrate of the light emitting portion 17b is exposed from the holder 17a and comes into contact with the support column 13d of the base 13.

The inspection seal member 18a is a seal member provided on the bottom surface of the illumination light source 10 for closing the airtightness inspection opening. The inspection seal member 18a is formed of an elastic resin member. Specifically, the elastic resin member is rubber, an elastomer, or the like.

The electric wire sealing member 18b is a sealing member into which the second electric wire 22a and the second electric wire 22b are inserted. The electric wire sealing member 18b seals between the housing 12 and the second electric wire 22a, and between the housing 12 and the second electric wire 22b. The electric wire sealing member 18b is formed of an elastic resin member. Specifically, the elastic resin member is rubber, an elastomer, or the like.

The seal member 19 is a so-called O-ring, and is sandwiched between the base 13 and the housing 12, and the housing 12 and the base 13 are fixed by fixing screws, so that the housing 12 and the base 12 are fixed. Seal between 13 and 13. The seal member 19 is formed of an elastic resin member (rubber, elastomer, etc.).

[Circuit board]
Next, the configuration of the circuit board 16 will be described with reference to FIGS. 4 to 6 in addition to FIG. FIG. 4 is an external perspective view of the circuit board 16. FIG. 5 is an external perspective view of the circuit board 16 with the electric wires removed. FIG. 6 is a schematic cross-sectional view of a portion of the circuit board 16 related to the electric wire.

As shown in FIGS. 3 to 6, the circuit board 16 includes a substrate 16a, a circuit component 20, a first electric wire 21a, a first electric wire 21b, a second electric wire 22a, and a second electric wire. 22b, a connection structure 23a, and a connection structure 23b are provided. The first electric wire 21b, the second electric wire 22b, and the connection structure 23b have the same configurations as the first electric wire 21a, the second electric wire 22a, and the connection structure 23a, so that they are detailed. The explanation may be omitted.

The substrate 16a is an annular (doughnut-shaped) substrate partially cut out from the outer peripheral side. The substrate 16a is fixed to the inside of the housing 12 by a locking claw (not shown) provided on the housing 12. The substrate 16a is arranged inside the housing 12 and outside the reflective member 14.

The substrate 16a is a printed circuit board on which metal wiring is patterned. As the substrate 16a, a ceramic substrate, a resin substrate, a metal base substrate, or the like is used.

An opening 26a and an opening 26b are formed on the peripheral edge of the substrate 16a. Each of the opening 26a and the opening 26b is a hole (through hole) having a circular shape in a plan view. A second electric wire 22a is passed through the opening 26a. A second electric wire 22b is passed through the opening 26b.

Further, a connecting portion 25a and a connecting portion 25b are formed on the peripheral edge portion of the substrate 16a. Each of the connecting portion 25a and the connecting portion 25b is a through hole. As shown in FIG. 6, the core wire 28a exposed at one end 24a of the first electric wire 21a is passed through the connection portion 25a from the upper surface side, and the core wire 28a is passed through the lower surface side of the substrate 16a by the solder 30. It is fixed. Although not shown, a core wire exposed at one end of the first electric wire 21b is passed through the connecting portion 25b and fixed by soldering.

The circuit component 20 is mounted on the substrate 16a. The circuit component 20 is, for example, a capacitive element such as an electrolytic capacitor or a ceramic capacitor, a resistance element, a coil element, a choke coil (choke transformer), a noise filter, a diode, a semiconductor element such as an integrated circuit element, or the like.

The circuit component 20 constitutes a drive circuit for causing the light emitting module 17 (light emitting unit 17b) to emit light. The electric power supplied to the drive circuit (circuit board 16) may be DC electric power or AC electric power. When AC power is supplied to the drive circuit, the drive circuit includes a power supply circuit that converts AC power supplied from an external power source into DC power.

The first electric wire 21a is a so-called lead wire, and one end portion 24a is connected to the substrate 16a. As shown in FIG. 6, the first electric wire 21a specifically includes a core wire 28a and an insulating covering member 29a that covers the core wire 28a. The first electric wire 21b, the second electric wire 22a, and the second electric wire 22b also have a structure in which the core wire is covered with a covering member.

At one end 24a of the first electric wire 21a, the core wire 28a is exposed without being covered by the covering member 29a. The exposed core wire 28a is passed through the connecting portion 25a of the substrate 16a from the upper surface side. The core wire 28a passed through the connecting portion 25a is fixed by the solder 30 on the lower surface side of the substrate 16a.

The length of the first electric wire 21a is longer than the linear distance L (shown in FIG. 4) from the connection portion 25a to the opening 26a. That is, the first electric wire 21a is bent (bent) on the upper surface side (Z-axis + side main surface side) of the substrate 16a.

The second electric wire 22a is a so-called lead wire and has a diameter larger than that of the first electric wire 21a. The second electric wire 22a is passed through the opening 26a. The second electric wire 22a is also passed through the electric wire sealing member 18b, and the other end of the second electric wire 22a is pulled out from the opening formed by the notch 12i and the notch 13e.

The first electric wire 21a and the second electric wire 22a are electrically and mechanically connected by the connection structure 23a, and are power supply lines for supplying electric power to the drive circuit (circuit board 16) from the outside of the lighting light source 10. Used as. 7 and 8 are diagrams for explaining the structure of the connection structure 23a.

The connection structure 23a connects the other end 24b of the first electric wire 21a and the one end 24c of the second electric wire 22b. As shown in FIGS. 7 and 8, the connection structure 23a includes a crimp terminal 23c and a cover 23d.

The crimp terminal 23c electrically and mechanically connects the core wire 28a exposed at the other end 24b of the first electric wire 21a and the core wire 28b exposed at the one end 24c of the second electric wire 22a. The crimp terminal 23c is, for example, a cylindrical so-called crimp sleeve, which is made of a metal such as copper.

As shown in FIG. 7A, one end of the crimp terminal 23c is crimped in a state where the exposed core wire 28a is passed through the other end 24b of the first electric wire 21a. As a result, the first electric wire 21a is crimped to the crimp terminal 23c. Further, as shown in FIG. 7B, the other end of the crimp terminal 23c is crimped in a state where the exposed core wire 28b is passed through the one end 24c of the second electric wire 22a. As a result, the second electric wire 22a is crimped to the crimp terminal 23c. Finally, as shown in FIG. 7 (c), the cover 23d passed through the second electric wire 22a is slid toward the crimp terminal 23c, and the crimp terminal 23c is covered with the cover 23d as shown in FIG. Covered by.

The cover 23d is an insulating cylindrical cover that covers the crimp terminal 23c. Specifically, the cover 23d is formed of an elastic resin member such as polyvinyl chloride or nylon.

When the crimp terminal 23c is passed through the cover 23d, the diameter of the cover 23d is expanded from the inside by the crimp terminal 23c, and the crimp terminal 23c is tightened. Therefore, as shown in FIG. 8, the portion overlapping with the first electric wire 21a is slightly thinner than the other portions.

The cover 23d may have an insulating property. The cover 23d may be, for example, a heat shrinkable tube. Further, the cover 23d may be a case for accommodating the crimp terminal 23c made of a resin having no elasticity (low elasticity).

The connection structure 23a described above is used as a tension stop structure. Specifically, the diameter of the opening 26a is larger than the diameter of the second electric wire 22a and smaller than the diameter of the connecting structure 23a. In other words, the opening 26a has a size (shape) such that the connection structure 23a is caught. Therefore, the connection structure 23a is caught by the edge of the opening 26a and does not pass through the opening 26a.

When the other end of the second electric wire 22a is connected to an external power source, the second electric wire 22a may be pulled from the inside to the outside of the illumination light source 10. In the circuit board 16, even if the second electric wire 22a is pulled, the connection structure 23a is caught on the edge of the opening 26a. Therefore, even if the second electric wire 22a is pulled, the force applied to the connecting portion (connecting portion 25a) between the substrate 16a and the first electric wire 21a is small.

Further, in the tension-stopping structure using the connection structure 23a, one opening 26a may be provided for one set of the first electric wire 21a and the second electric wire 22a, and thus is described in Patent Document 1 described above. The load on the connection portion between the substrate 16a and the first electric wire 21a can be reduced in a smaller space than the tension-stopping structure of the above.

By the way, in general, the electric wire drawn out to the outside of the lighting light source 10 is required to have a thick insulating coating from the viewpoint of safety. That is, the electric wire drawn out to the outside of the illumination light source 10 should be thick. However, if a thick electric wire is housed inside the illumination light source 10, the space for the electric wire becomes large, and it becomes difficult to reduce the size of the illumination light source 10.

On the other hand, if the first electric wire 21a and the second electric wire 22a are connected by the connection structure 23a as in the circuit board 16, the thin first electric wire 21a is arranged inside the lighting light source 10. The thick second electric wire 22a can be pulled out to the outside of the illumination light source 10. By arranging the thin first electric wire 21a inside, the tension-stopping structure can be realized in a small space, and the effect of facilitating the miniaturization of the illumination light source 10 can be obtained.

Further, when a core wire as thin as possible is used in order to prioritize the miniaturization of the lighting light source 10, an expensive and hard core wire is required to ensure heat resistance. If the first electric wire 21a and the second electric wire 22a are connected by the connecting structure 23a, the expensive core wire 28a may be used only for the first electric wire 21a instead of the entire electric wire. Therefore, there is an advantage that the lighting light source 10 can be miniaturized at low cost.

In the structure in which the connection structure 23a is hooked on the edge of the opening 26a in this way, when the second electric wire 22a is pulled, a force is likely to be applied to the vicinity of the edge of the opening 26a. Therefore, in the illumination light source 10, the edge of the opening 26a is supported by the support member 12c (shown in FIG. 6) provided in the housing 12. More specifically, the support member 12c supports the portion of the substrate 16a between the openings 26a and the openings 26b from the opposite side of the connecting structure 23a.

As shown in FIG. 9, the support member 12c is provided on the inner wall 12d of the housing 12 as a part of the housing 12. FIG. 9 is an external perspective view of the housing 12. In this way, the support member 12c supports the edge of the opening 26a from the side opposite to the connection structure 23a. According to the support member 12c, when the second electric wire 22a is pulled, the load applied to the substrate 16a can be effectively reduced, and the effect that the substrate 16a is less likely to be deformed such as bending can be obtained.

[Modification 1]
In the first embodiment, the second electric wire 22a is passed through the opening 26a, and the second electric wire 22b is passed through the opening 26b. In the first embodiment, both the second electric wire 22a and the second electric wire 22b are power supply lines for supplying electric power to the circuit board 16 from the outside, but the power supply lines are used as a set of two. Is normal. Therefore, the two second electric wires 22a and the second electric wire 22b may be passed through one opening. FIG. 10 is a diagram showing an example of an opening through which the two second electric wires 22a and the second electric wire 22b are passed.

The opening 26c shown in FIG. 10 is a so-called elongated hole. Specifically, the opening 26c is a hole (through hole) having a racetrack shape in a plan view, but may be a hole having an elliptical shape in a plan view. The opening 26c has a size (shape) that allows the second electric wire 22a and the second electric wire 22b to pass through at the same time.

Further, each of the connection structure 23a and the connection structure 23b is caught on the edge of the opening 26c. Each of the connection structure 23a and the connection structure 23b has a maximum width larger than the width of the opening 26c (for example, the width in the lateral direction). That is, each of the connection structure 23a and the connection structure 23b has a size (shape) of being caught on the edge of the opening 26c. It should be noted that each of the connection structure 23a and the connection structure 23b may have a size that catches on the edge of the opening 26c when passed through the opening 26c at the same time.

With such a configuration, the load on the connection portion between the substrate 16a and the first electric wire 21a when the second electric wire 22a is pulled and the second electric wire 22b are pulled by one opening 26c. It is possible to reduce the load on the connection portion between the substrate 16a and the first electric wire 21b.

[Modification 2]
The opening formed in the substrate 16a may have any shape and size as long as the connection structure 23a is caught on the edge of the opening. For example, in the first embodiment, the opening formed in the substrate 16a has a hole shape (through hole shape), but the opening may be formed in a notch shape. FIG. 11 is a diagram showing an example of an opening formed in a notch shape.

The opening 26d shown in FIG. 11 is an opening formed in the substrate 16a in a notch shape. A second electric wire 22a and a second electric wire 22b are passed through the opening 26d. That is, the opening 26d has a size (shape) that allows the second electric wire 22a and the second electric wire 22b to pass through at the same time. The substrate 16a may have a notch-shaped opening corresponding to the second electric wire 22a and a notch-shaped opening corresponding to the second electric wire 22b separately formed.

Further, each of the connection structure 23a and the connection structure 23b is caught on the edge of the opening 26d. Each of the connection structure 23a and the connection structure 23b has a maximum width larger than the width of the opening 26d (for example, the width in the lateral direction). That is, each of the connection structure 23a and the connection structure 23b has a size of being caught by the edge of the opening 26d. The positions of the second electric wire 22a and the second electric wire 22b passed through the opening 26d are regulated by the inner wall 12d (shown in FIG. 9) of the housing 12.

In this way, the notch-shaped opening 26d also pulls the load on the connection portion between the substrate 16a and the first electric wire 21a when the second electric wire 22a is pulled, and the second electric wire 22b. It is possible to reduce the load on the connection portion between the substrate 16a and the first electric wire 21b at that time.

Further, the second electric wire 22a and the second electric wire 22b can be inserted into the notch-shaped opening 26d from the side. That is, the work of passing the second electric wire 22a and the second electric wire 22b through the opening 26d becomes easy.

[Effects, etc.]
As described above, in the circuit board 16, the circuit component 20, the substrate 16a on which the circuit component 20 is mounted and the opening 26a is formed, and one end portion 24a are connected to the substrate 16a. The electric wire 21a, the second electric wire 22a which is thicker than the first electric wire 21a and passed through the opening 26a, the other end 24b of the first electric wire 21a, and one end of the second electric wire 22a. A connection structure 23a for connecting the 24c is provided. The connection structure 23a is caught on the edge of the opening 26a.

As a result, even if the second electric wire 22a is pulled, the connection structure 23a is caught on the edge of the opening 26a, so that the load on the connecting portion between the substrate 16a and the first electric wire 21a can be reduced. A tension-stopping structure using such a connection structure 23a can be realized in a smaller space than a tension-stopping structure in which an electric wire is passed through a plurality of openings. Further, when the circuit board 16 is housed in the housing 12, the thin first electric wire 21a can be arranged inside the housing 12, so that the tension-stopping structure can be realized in a small space.

Further, the circuit board 16 may include another set of a first electric wire 21a, a second electric wire 22a, and a connection structure 23a. Specifically, the circuit board 16 may further include a first electric wire 21b, a second electric wire 22b, and a connection structure 23b. Two second electric wires 22a and a second electric wire 22b may be passed through the opening 26c.

As a result, the load on the connection portion between the substrate 16a and the first electric wire 21a when the second electric wire 22a is pulled by one opening 26c, and the substrate when the second electric wire 22b is pulled. The load on the connection portion between the 16a and the first electric wire 21a can be reduced.

Further, the circuit board 16 is housed in the housing 12, the opening 26d is formed in a notch shape, and the position of the second electric wire 22a passed through the opening 26d is regulated by the inner wall 12d of the housing 12. May be good.

A second electric wire 22a can be inserted from the side into such a notched opening 26d. That is, the work of passing the second electric wire 22a through the opening 26d becomes easy.

Further, the connection structure 23a has an insulating property that covers the crimp terminal 23c that connects the other end 24b of the first electric wire 21a and the one end 24c of the second electric wire 22a, and the crimp terminal 23c. A cover 23d having the cover 23d may be provided.

As described above, the tension-stopping structure can be realized by using the crimp terminal 23c and the cover 23d as the connection structure 23a.

Further, one end 24a of the first electric wire 21a is connected to the connecting portion 25a of the substrate 16a, and the length of the first electric wire 21a may be longer than the distance from the connecting portion 25a to the opening.

As a result, even if the second electric wire 22a is pulled, the connection structure 23a is caught on the edge of the opening 26a, so that the load on the connecting portion between the substrate 16a and the first electric wire 21a can be reduced.

Further, the first electric wire 21a and the second electric wire 22a may be power supply lines for supplying electric power to the circuit board 16 from the outside.

Thereby, when the power supply line is pulled, the load on the connection portion between the substrate 16a and the power supply line can be reduced.

Further, the first electric wire 21a may include a conductive core wire 28a and an insulating covering member 29a that covers the core wire 28a.

As described above, the first electric wire 21a can be formed by the core wire 28a and the covering member 29a.

Further, the illumination light source 10 includes a circuit board 16 and a support member 12c that supports the edge of the opening 26a from the side opposite to the connection structure 23a. The illumination light source 10 is an example of an electric device.

As a result, when the second electric wire 22a is pulled, the load applied to the substrate 16a can be effectively reduced, and the effect that the substrate 16a is less likely to be deformed such as bending can be obtained.

(Embodiment 2)
In the first embodiment, the illumination light source 10 has been described as an example of the electric device provided with the circuit board 16. However, the present invention may be realized as a lighting device including, for example, a lighting light source 10 (circuit board 16). Hereinafter, a lighting device including the lighting light source 10 will be described. FIG. 12 is a perspective view of the lighting device according to the second embodiment.

As shown in FIG. 12, the lighting device 100 is a so-called downlight, for example, an embedded lighting device that illuminates the lower part (corridor, wall, etc.) by being embedded in the ceiling of a house or the like. .. The lighting light source 10 is housed in the fixture main body 110 of the lighting device 100. At this time, the Z-axis + side in the first embodiment is the main emission direction of the light of the lighting device 100. The connection hole and the connection screw described in the first embodiment are used for attaching the illumination light source 10 to the fixture main body 110.

The fixture body 110 is a mounting base on which the lighting light source 10 is mounted, and also functions as a heat sink that dissipates heat generated by the lighting light source. The instrument body 110 is made of, for example, aluminum die-cast. A plurality of heat radiating fins are provided on the upper part (ceiling side portion) of the appliance main body 110.

The terminal block 160 is attached to a mounting plate 170 provided separately from the instrument main body 110. The mounting plate 170 is a rectangular plate-shaped member made of a metal material, and a terminal block 160 is mounted on the lower surface. The mounting plate 170 is connected to each other with the top plate 180 mounted on the upper part of the instrument main body 110.

As described above, the illumination light source 10 can be applied to the downlight, but may be applied to other illumination devices. FIG. 13 is a perspective view of another lighting device according to the second embodiment.

As shown in FIG. 13, the lighting device 200 is a so-called spotlight, and includes a cover 210, a lamp 220, and an arm 230.

A lighting light source 10 is housed inside the lamp 220, and the light emitted from the lighting light source 10 passes through the cover 210 and is emitted to the outside of the lighting device 200. The lamp 220 and the arm 230 are fixed by a fixing member such as a screw.

In this way, the illumination light source 10 can be applied to a spotlight. The lighting light source 10 can be applied to lighting devices other than downlights and spotlights. Since the lighting light source 10 includes the seal member as described above, it is particularly useful as a light source for outdoor lighting such as lighting attached to a low pole or underground lighting.

(Other embodiments)
Although the circuit board and the electrical equipment (light source 10 for lighting, lighting device 100, and lighting device 200) according to the embodiment have been described above, the present invention is not limited to such an embodiment. ..

For example, in the above embodiment, in the connection structure, the cover portion is caught on the edge of the opening, but the crimp terminal portion may be caught on the edge of the opening. The connecting structure may be constructed in any way as long as it catches on the edge of the opening. For example, the connection structure may be a connector structure including a socket (housing). In this case, the socket (housing) may be caught on the edge. The connecting structure is caught on the edge of the opening, for example, if the maximum width in plan view is greater than the width of the opening.

Further, in the above embodiment, the support member for supporting the circuit board is provided in the housing, but may be provided in other members such as a base. That is, the member (supporting member) that supports the circuit board is not particularly limited.

Further, in the above embodiment, the first electric wire and the second electric wire are used as power lines, but the first electric wire and the second electric wire may be used as signal lines. That is, the use of the first electric wire and the second electric wire is not particularly limited.

Further, in the above embodiment, an example in which the circuit board of the present invention is applied to an electric device for lighting purposes has been described, but the circuit board of the present invention can be widely used not only for lighting purposes but also for various electric devices. ..

Further, in the above embodiment, the light emitting module is a light emitting module having a COB structure, but may be an SMD (Surface Mount Device) type.

Further, in the above embodiment, the light emitting module uses an LED as a light emitting element, but a semiconductor light emitting element such as a semiconductor laser, or a solid light emitting element such as an organic EL (Electroluminescence) or an inorganic EL may be used. Good.

Although the circuit board and the electric device according to one or more aspects have been described above based on the embodiment, the present invention is not limited to this embodiment. As long as the gist of the present invention is not deviated, various modifications that can be conceived by those skilled in the art are applied to the present embodiment, and a form constructed by combining components in different embodiments is also within the scope of one or more embodiments. May be included within.

10 Light source for lighting (electrical equipment)
12c Support member 12d Inner wall 16 Circuit board 16a Board 20 Circuit parts 21a, 21b First wire 22a, 22b Second wire 23a, 23b Connection structure 23c Crimping terminal (terminal)
23d Cover 24a, 24c One end 24b The other end 25a, 25b Connection 26a, 26b, 26c, 26d Opening 28a, 28b Core wire 29a Covering member 100, 200 Lighting equipment (electrical equipment)

Claims (8)

With circuit parts
A substrate on which the circuit components are mounted and an opening is formed,
A first electric wire whose one end is connected to the substrate,
A second wire that is thicker than the first wire and that is passed through the opening.
The other end of the first electric wire and a connection structure for connecting one end of the second electric wire are provided.
The connection structure is a circuit board that is caught on the edge of the opening because the maximum width is larger than the width of the opening. The circuit board includes the first electric wire, the second electric wire, and another set of the connection structure.
The circuit board according to claim 1, wherein the two second electric wires are passed through the opening. The circuit board is housed in a housing and
The opening is formed in a notch shape.
The circuit board according to claim 1 or 2, wherein the position of the second electric wire passed through the opening is regulated by the inner wall of the housing. The connection structure
A terminal connecting the other end of the first electric wire and the one end of the second electric wire.
The circuit board according to any one of claims 1 to 3, further comprising an insulating cover that covers the terminals. The one end of the first wire is connected to the connection of the substrate.
The circuit board according to any one of claims 1 to 4, wherein the length of the first electric wire is longer than the distance from the connection portion to the opening. The circuit board according to any one of claims 1 to 5, wherein the first electric wire and the second electric wire are power supply lines for supplying electric power to the circuit board from the outside. The first electric wire is
Conductive core wire and
The circuit board according to any one of claims 1 to 6, further comprising an insulating covering member that covers the core wire. The circuit board according to any one of claims 1 to 7.
An electrical device including a support member that supports the edge of the opening from the side opposite to the connection structure.

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