JP7394356B2 - Lighting equipment and showcase - Google Patents

Description

The present disclosure relates to a lighting device and a showcase.

2. Description of the Related Art Showcases for displaying goods have become popular mainly in retail stores such as supermarkets and convenience stores. Generally, a lighting device is installed inside the showcase to illuminate the display room and the front of the showcase. In recent years, showcases have been developed that employ LED lighting devices that use LEDs (Light Emitting Diodes) as light emitting elements.

Such a showcase is disclosed in, for example, Patent Document 1. Patent Document 1 discloses a product display device having an illumination device in which an LED element is arranged inside a pipe member and both ends of the pipe member are closed with cap-shaped sockets.

JP2018-006211A

For example, in a showcase equipped with a refrigeration device or a freezing device, moisture may be generated inside due to dew condensation or the like. In order to prevent the generated moisture from penetrating into the inside of the lighting device, it is necessary to particularly provide the cap members that close both ends of the lighting device with sufficient waterproof performance.

BACKGROUND ART Conventionally, as a method of imparting waterproof performance to a cap member of a lighting device, for example, there is a method of using screws or an adhesive. However, when screwing is used, for example, it is difficult to obtain sufficient waterproof performance. Furthermore, for example, when an adhesive having waterproof performance is used, the adhesive tends to deteriorate over time, making it difficult to maintain sufficient waterproof performance over a long period of time. Furthermore, the adhesive may change color due to deterioration over time, and the color of light transmitted through the vicinity of the cap member may change.

In view of such circumstances, the present disclosure aims to provide a lighting device and a showcase that can achieve both sufficient waterproof performance and good appearance.

The lighting device of the present disclosure includes a light emitting element, a substrate on which the light emitting element is arranged, a casing that houses the substrate, and a cap that is welded to an end of the casing by high frequency welding. a wall member provided on the cap member and covering the opening at the end of the casing; an outer edge member provided on the cap member facing the outer wall surface of the casing; and an inner side of the wall member. a welding portion provided on a surface of the cap member for welding the cap member to the housing, and a protrusion for creating a gap between an outer wall surface of the housing and an inner wall surface of the outer edge member. , the protrusion is formed at a position not in contact with a light emitting part that emits light emitted from the light emitting element to the outside of the housing.

A showcase of the present disclosure includes the lighting device described above.

According to the present invention, it is possible to achieve both sufficient waterproof performance and good appearance.

Partially cutaway plan view of the lighting device Cross-sectional view showing the inside of the lighting device housing Enlarged view of the connection part of the lighting device FIG. 2A is a perspective view of the end cap as seen from the front side, FIG. 2B is a front view of the end cap, FIG. 2C is a perspective view of the end cap as seen from the back side, and FIG. 2D is a perspective view of the end cap as seen from the back side. FIG. 2E is a top view of the end cap. 3A is a perspective view of the cap body as seen from the front side, FIG. 3B is a front view of the cap body, FIG. 3C is a perspective view of the cap body as seen from the back side, and FIG. 3D is a rear view of the cap body. 3E is a sectional view taken along line AA in FIG. 3D. FIG. 4A is a perspective view of the core as seen from the front side, FIG. 4B is a front view of the core, FIG. 4C is a perspective view of the core as seen from the back side, and FIG. 4D is a perspective view of the core as seen from the back side. FIG. 4E is a partially transparent view of FIG. 4D viewed from above. Enlarged plan view near the end cap of the lighting device Perspective view of a showcase using lighting equipment Cross-sectional view of the showcase in the front and back direction

Hereinafter, each embodiment of the present disclosure will be described in detail with reference to the drawings. However, unnecessarily detailed explanations, such as detailed explanations of already well-known matters or redundant explanations of substantially the same configurations, etc., may be omitted. Note that the following description and the drawings referred to are provided for those skilled in the art to understand the present disclosure, and are not intended to limit the scope of the claims of the present disclosure.

<Description of the lighting device>
A lighting device 100 according to an embodiment of the present disclosure will be described with reference to FIGS. 1A to 1C. FIG. 1A is a partially cutaway plan view of the lighting device 100, FIG. 1B is a sectional view showing the inside of the casing of the lighting device 100, and FIG. 1C is an enlarged view of a connecting portion of the lighting device 100. Note that in this specification, for convenience, the upper direction of the paper in FIG. 1B is assumed to be the top, and the lower direction of the paper in FIG. 1B is the bottom. In this case, in FIGS. 1A and 1C, the front direction of the paper is the top, and the back direction of the paper is the bottom.

The lighting device 100 includes an LED 1, a mounting board 2, a housing 3, a power cable 4, a connector 5, a terminal portion 6, a connecting terminal 7, an electronic component 8, and an end cap 10, as shown in FIGS. 1A to 1C. LED1 is an example of a light emitting element of the present disclosure. End cap 10 is an example of a cap member of the present disclosure.

A plurality of LEDs 1 are mounted on a mounting board 2. As shown in FIG. 1C, the LED 1 includes an LED chip 1a, a package 1b, and a sealing part 1c. The package 1b includes a recess that accommodates the LED chip 1a. The sealing portion 1c is filled in the recess so as to cover the LED chip 1a. The sealing portion 1c is made of a translucent sealing material. Examples of the translucent sealing material include silicone resin, epoxy resin, glass, and the like. The sealing portion 1c contains a phosphor that emits fluorescence when excited by the light emitted from the LED chip 1a.

The LED 1 can emit white light, for example, by mixing the blue light emitted from the LED chip 1a and the yellow light emitted from the phosphor. The LED 1 may be configured to emit not only white light but also, for example, bulb-colored light by changing the type of LED chip 1a or phosphor.

The mounting board 2 has a rectangular flat plate-like and elongated external shape, and is housed inside the casing 3 . In the following description, the surface of the mounting board 2 on which the LED 1 is mounted will be referred to as the first surface 21, and the surface on the opposite side will be referred to as the second surface 22.

In the mounting board 2, various wirings (not shown) are provided on the first surface 21 and/or the second surface 22. The wiring on the first surface 21 side and the wiring on the second surface 22 side are electrically connected by a through wiring (not shown) that penetrates in the thickness direction. A resist film is formed on the mounting board 2 so as to cover the wiring except for the mounting surface of the LED 1, the terminal portion 6, the connection terminal 7, the electronic component 8, etc.

On the first surface 21 of the mounting board 2, a plurality of LEDs 1 are mounted along the longitudinal direction at the center in the transverse direction. As a method for mounting the LED 1 on the mounting board 2, for example, solder is used. On the mounting board 2, the LEDs 1 are arranged at regular intervals. The plurality of LEDs 1 are electrically connected in series by wiring. The mounting board 2 is not limited to a structure in which a plurality of LEDs 1 are electrically connected in series, but may be in a structure in which they are electrically connected in parallel or in series and parallel. Further, the number of LEDs 1 mounted on the mounting board 2 is not particularly limited in this disclosure.

As shown in FIG. 1A, a terminal portion 6 is mounted on the first surface 21 near the end of the mounting board 2 in the longitudinal direction near the end cap 10. As shown in FIG. As shown in FIG. 1A, two terminal portions 6 are mounted along the lateral direction of the mounting board 2. As shown in FIG.

When the total length of the mounting board 2 is shorter than that of the casing 3, a plurality of mounting boards 2 may be housed inside the casing 3 while being connected to each other in the longitudinal direction. Note that the plurality of mounting boards 2 being connected to each other means that the plurality of mounting boards 2 are electrically and physically connected. The mounting boards 2 are connected to each other by connection terminals 7. The LEDs 1 are arranged on the mounting board 2 so that even when a plurality of mounting boards 2 are connected to each other, the plurality of LEDs 1 mounted on the mounting board 2 are equally spaced from each other along the long axis direction. It is desirable to be present. Specifically, for example, the distance from the end of the mounting board 2 to the LED 1 near the end is preferably about half the distance between adjacent LEDs 1.

As the mounting board 2, for example, a glass epoxy resin board is used. Note that the present invention is not limited to this, and as the mounting board 2, for example, a ceramic board, a metal-based printed wiring board, or the like may be used.

The housing 3 has an elongated hollow shape (cylindrical shape), and the mounting board 2 is housed inside the housing 3. Therefore, the housing 3 is formed to be longer than at least one mounting board 2 in the longitudinal direction. The housing 3 has a light emitting section 31, a pair of side walls 32, a guide section 33, and a bottom wall 34.

The light emitting section 31 is provided on the first surface 21 side of the mounting board 2 so as to emit the light emitted from the LED 1 to the outside, and has translucency for the light emitted from the LED 1. . The light emitting section 31 has an approximately semi-cylindrical outer shape.

The pair of side walls 32 are formed integrally with the light emitting section 31 so as to extend from both ends of the light emitting section 31 . A guide portion 33 that contacts the mounting board 2 is formed on the side wall 32 . The mounting board 2 is housed inside the casing 3 with the LED 1 facing the light emitting part 31 and both end edges in the short direction touching the guide part 33.

The bottom wall 34 is formed on the side of the housing 3 that faces the light emitting section 31 . When the mounting board 2 is housed inside the housing 3, the bottom wall 34 faces the second surface 22 of the mounting board 2. The mounting board 2 is held stationary within the housing 3 by the bottom wall 34 and the guide portion 33.

The housing 3 is made of a hard resin that is transparent. Examples of the material for the housing 3 include polycarbonate resin, acrylic resin, and the like. The housing 3 can be formed by extrusion molding, for example. The housing 3 may be formed by two-color molding. The housing 3 may be formed of a light-transmitting resin material containing a light-diffusing material. Note that although the housing 3 has a configuration in which the light emitting section 31, the side wall 32, the guide section 33, and the bottom wall 34 are integrally formed, the present disclosure is not limited to this. In the case 3, for example, the light emitting section 31 is made of a translucent material so that at least the light from the LED 1 can be emitted from the light emitting section 31 to the outside, and the parts other than the light emitting section 31 are made of other material such as aluminum. It may be formed by

The power cable 4 is a covered wire whose core wire is coated with an insulating coating member (vinyl, etc.), and supplies power from the outside to the LED 1. One end of the power cable 4 is electrically connected to the connector 5, and the other end is electrically connected to the terminal portion 6. As shown in FIG. 1A, the power cable 4 is a parallel wire in which two-core wires are covered and connected in parallel on the outside of the casing 3, and inside the casing 3, the two-core wires are connected in parallel. are separated and placed at different locations while still being covered. Note that this parallel line may be covered with an insulating coating member in a double coating.

The connector 5 is configured to be inserted into and removed from a receptacle connector provided on a DC power supply device (not shown) provided outside the lighting device 100. A DC power supply device includes, for example, a switching power supply circuit, converts an AC voltage supplied from a power system into a DC voltage, and outputs the DC voltage.

The terminal portion 6 is a terminal that electrically connects the wiring of the mounting board 2 and the power cable 4. As shown in FIG. 1A, two terminal portions 6 are provided on the mounting board 2, and each terminal portion 6 is connected to each of a pair of covered wires forming the power cable 4.

The connection terminals 7 are provided at both ends or one end of the mounting substrate 2 in the longitudinal direction, and connect the plurality of mounting substrates 2 to each other. In the mounting board 2, for example, one connection terminal 7 is a male terminal, and the other connection terminal 7 is a female terminal. The connection terminal 7 can not only physically connect the mounting boards 2 to each other, but also electrically connect the wirings of the mounting boards 2 to each other. As a result, when a plurality of mounting boards 2 are housed inside the casing 3 while being connected to each other, electric power is transmitted to the plurality of mounting boards 2 via the connector 5, the power cable 4, the terminal section 6, and the wiring. is supplied to the LED1 mounted on the LED.

The electronic component 8 is a plurality of types of components mounted on the mounting board 2, and controls the drive of the LED 1. The electronic component 8 is mounted on the mounting board 2 using, for example, solder. Each of the electronic components 8 is electrically connected to the plurality of LEDs 1 via wiring. A plurality of types of electronic components 8 are electrically connected to each other and constitute a constant current circuit that supplies a constant current to the LED 1. Examples of the electronic component 8 include a resistor, a transistor, and the like. The constant current circuit ensures that the current flowing through the LED 1 is constant when a predetermined DC voltage is applied.

As shown in FIG. 1A, the end cap 10 is provided at the end of the housing 3 in the longitudinal direction, and blocks the inside of the housing 3 from the outside. The end cap 10 allows the power cable 4 to pass through the inside of the housing 3, but has waterproof performance to prevent water from entering. The end cap 10 is formed to have a slightly larger outer shape than the end of the casing 3 so that it can be attached to the end of the casing 3. Details of the end cap 10 will be described next.

<Description of end cap 10>
Below, the end cap 10 will be explained in detail. In the following description, the end cap 10 is a surface viewed from the outside of the housing 3 along the longitudinal direction of the housing 3 when the end cap 10 is attached to the housing 3 as shown in FIG. 1A. The front surface of the end cap 10 as seen from the inside of the casing 3 is the back surface of the end cap 10.

FIG. 2A is a perspective view of the end cap 10 seen from the front side. FIG. 2B is a front view of the end cap 10. FIG. 2C is a perspective view of the end cap 10 seen from the back side. FIG. 2D is a rear view of the end cap 10. Further, FIG. 2E is a top view of the end cap 10.

As shown in FIGS. 2A to 2E, the end cap 10 has a cap body 11 and a core 12. The cap body 11 is a member formed to match the outer shape of the housing 3. The core 12 is a member that holds the power cable 4, and is fitted into the cap body 11 while holding the power cable 4, and is fixed to the cap body 11 by welding.

As shown in FIGS. 2A to 2E, the power cable 4 has two wires connected to each other (parallel wires) on the front side of the end cap 10, and has two wires on the back side of the end cap 10. The wires are separated from each other.

<Description of the cap body 11>
3A to 3E are diagrams for explaining the cap body 11. FIG. FIG. 3A is a perspective view of the cap body 11 viewed from the front side. FIG. 3B is a front view of the cap body 11. FIG. 3C is a perspective view of the cap body 11 viewed from the back side. FIG. 3D is a rear view of the cap body 11. FIG. 3E is a sectional view taken along line AA in FIG. 3D.

As shown in FIGS. 3A to 3E, the cap body 11 includes an outer edge member 111, a wall member 112, a hole 113, a first welding rib 114, a welding margin 115, a second welding rib 116, and a guide member 117. The cap body 11 is made of hard resin.

As with the case 3, examples of the material for the cap body 11 include polycarbonate resin, acrylic resin, and the like. By forming the cap body 11 with a hard resin, the overall thickness of the cap body 11 (distance from the front end to the back end) can be made thinner from the viewpoint of strength, compared to a case where the cap body 11 is made of a soft resin. can do. Furthermore, it is desirable that the cap body 11 be made of transparent resin.

The outer edge member 111 is a member that comes into contact with the outer edge of the housing 3 and fixes the end cap 10 to the housing 3 when the end cap 10 is attached to the housing 3 (see FIG. 1). The outer edge member 111 has a predetermined thickness. The predetermined thickness is, for example, 9 mm. As a result, as shown in FIG. 1A, when the end cap 10 is attached to the housing 3, the outer edge member 111 of the cap body 11 is provided at the outermost side of the LEDs 1 in the longitudinal direction of the housing 3. It is arranged further outside than the LED 1. Therefore, the end cap 10 does not cover the LED 1. If the end cap 10 covers the LED 1, the color of the light that passes through the end cap 10 when the LED 1 emits light will be slightly different from the color of the light that passes through the light emitting part 31 of the housing 3 (see FIG. 1). This may give the viewer a sense of discomfort. The present disclosure can avoid such a situation with the above-described configuration.

The wall member 112 separates the outside and the inside of the housing 3 when the end cap 10 is attached to the housing 3 (see FIG. 1A). A hole 113 is provided in the wall member 112. A part of the core 12 (first protrusion 122 shown in FIG. 4A etc.) fits into this hole 113.

The first welding rib 114 melts when the core 12 is fitted into the cap body 11, fills the gap between the end of the cap body 11 and the core 12, and hardens to connect the cap body 11 and the core. This is a member for welding the parts 12 and 12 together. As shown in FIGS. 3D and 3E, the first welding rib 114 is provided at the edge of the hole 113. In this embodiment, high frequency welding is used to weld the cap body 11 and the core 12 together. High-frequency welding is a method of melting and welding materials from the inside using dielectric heating using high-frequency waves, and has the characteristic that the welded area looks good because there is no physical vibration.

As shown in FIGS. 3C and 3D, a space is provided around the hole 113 on the back side of the wall member 112 into which the melted first welding rib 114 flows when the cap body 11 is welded to the core 12. A welding margin 115 is provided.

The second welding rib 116 is melted when the cap body 11 (end cap 10) is attached to the end of the housing 3 (see FIG. 1A), and the second welding rib 116 is formed in the gap between the cap body 11 and the end of the housing 3. This is a member for welding the cap body 11 and the casing 3 together by filling the cap body 11 and the housing 3 together. High frequency welding is used to weld the cap body 11 and the housing 3 together. The second welding rib 116 is provided at a position where the end of the casing 3 comes into contact with the wall member 112 when the cap body 11 is attached to the end of the casing 3 . Specifically, the second welding rib 116 is arranged near the outer edge member 111 on the back side of the wall member 112, as shown in FIGS. 3C and 3D. Note that, as described above, since the cap body 11 is made of transparent resin, when the second welding rib 116 melts, it can be visually recognized from the outside. Therefore, it is possible to easily check whether the cap body 11, the core 12, and the housing 3 have been suitably welded together.

The guide member 117 is a member for guiding the outer end of the housing 3 to the inside of the cap body 11, that is, to the vicinity of the wall member 112 when the end cap 10 is attached to the housing 3. As shown in FIG. 3C, the guide member 117 is formed on the inner wall surface of the outer edge member 111.

Furthermore, when the end cap 10 is attached to the casing 3, the guide member 117 is in a state where the tip portion of the guide member 117 is in contact with the side surface of the end (outer wall surface of the end) of the casing 3. Friction can assist in fixing the end cap 10 to the housing 3.

As shown in FIGS. 3C and 3D, the guide member 117 is formed to protrude from the wall member 112 of the cap body 11 (outer edge member 111) toward the back side, so that the end cap 10 is attached to the housing 3. When attached, a small gap can be ensured between the wall member 112 of the cap body 11 and the side surface of the end of the casing 3. For example, adhesive may be poured into this gap, and in that case, the end cap 10 is prevented from coming off from the housing 3 from the time the end cap 10 is attached to the housing 3 until it is welded. Can be fixed.

As shown in FIG. 3D, the guide member 117 is provided almost only in the lower half of the cap body 11. In other words, the guide member 117 is formed at a portion that does not come into contact with the light emitting section 31 (see FIG. 1B) when the end cap 10 is attached to the housing 3. The reason for this is to avoid a situation where when the LED 1 emits light with the end cap 10 attached to the housing 3, the light hits the guide member 117 and is scattered. If the guide member 117 is provided on the upper side of the cap body 11, the light emitted from the LED 1 will be scattered by the guide member 117, and the color of the scattered light, the direction of emission to the outside of the casing 3, etc. will be affected. A situation may arise in which the light emitted from the light emitting section 31 differs from the light emitted from the light emitting section 31. By forming the guide member 117 in a portion that does not come into contact with the light emitting section 31, such a situation can be prevented from occurring.

Note that the guide member 117 may be slightly melted and used for welding the end cap 10 and the housing 3 during high-frequency welding.

<Description of core 12>
4A to 4E are diagrams for explaining the core 12. FIG. 4A to 4E, a portion of the power cable 4 held by the core 12 is also illustrated for the sake of explanation. FIG. 4A is a perspective view of the core 12 seen from the front side. FIG. 4B is a front view of the core 12. FIG. 4C is a perspective view of the core 12 seen from the back side. FIG. 4D is a rear view of the core 12. FIG. 4E is a partially transparent top view of FIG. 4D.

As shown in FIG. 4A or 4B, the core 12 has a core body 121, a first protrusion 122, a first hole 123, a second protrusion 124, and a second hole 125.

The core body 121 has a surface that comes into close contact with the cap body 11 when the core 12 is fitted into the cap body 11 (close contact surface 126: the shaded portion in FIG. 4B). As shown in FIGS. 4A and 4B, the contact surface 126 is provided on the front side of the core 12, and the first protrusion 122 is provided at the center of the contact surface 126.

The first protrusion 122 is a member that protrudes from the contact surface 126 of the core body 121 in the front direction. The cross-sectional area of the first protrusion 122 in a plane perpendicular to the axis extending from the front to the back is smaller than the core body 121 and is approximately the same as the opening area of the hole 113 (see FIG. 3) of the cap body 11. It is formed. As a result, when the core 12 is fitted into the cap body 11, the first protrusion 122 fits into the hole 113 of the cap body 11, and the contact surface 126 of the core body 121 is attached to the wall of the cap body 11. It comes into close contact with the member 112. By performing the above-described high-frequency welding in this state, the cap body 11 and the core 12 are suitably welded.

A first hole 123 is provided approximately at the center of the first protrusion 122 . The first hole 123 is a hole through which the power cable 4 is passed. The power cable 4 passed through the first hole 123 is a parallel wire in which two-core electric wires are connected to each other by a covering member (such as vinyl). Therefore, the first hole 123 has a shape that matches the outer shape of such parallel lines.

The second protrusion 124 is a member that protrudes toward the back surface of the core body 121. A pair of second holes 125 are provided in the second protrusion 124 at positions separated from each other. The pair of second holes 125 are holes for passing separated two-core electric wires while being covered.

That is, the power cable 4 held by the core 12 is in the state of a parallel wire in which the two-core electric wire is covered and connected in parallel in the first hole 123, and the two-core electric wire is connected in parallel in the second hole 125. The wires are separated while still being covered. This arrangement of the power cable 4 is realized by a branch 127 provided inside the core 12, as shown in FIG. 4E. The branch part 127 has a bifurcated shape, and the power cable 4 is in a parallel line from the first hole 123 to the branch part 127, and from the branch part 127 to the second hole 125. The two core wires are separated between them.

With this configuration, even when the LED 1 is mounted near the end of the mounting board 2, the power cable 4 does not interfere with the light emission of the LED 1. This effect will be specifically explained with reference to FIG. 5. FIG. 5 is an enlarged plan view of the vicinity of the end cap 10 of the lighting device 100.

As shown in FIG. 5, inside the housing 3, the power cables 4 are separated from each other by the core 12. As a result, when the LEDs 1 are mounted up to the vicinity of the end of the mounting board 2, the outermost LED 1 in the housing 3 can be placed between the separated two-core power cables 4. Therefore, it is possible to avoid a situation where the power cable 4 obstructs the light emission of the LED 1 disposed on the outermost side of the housing 3 .

Note that, as shown in FIG. 5, when the end cap 10 is attached to the housing 3, the cap body 11 and the core 12 are located on the outside of the housing 3 than the outermost LED 1, and on the outside of the LED 1. It is placed so that it does not overlap. Thereby, it is possible to avoid a situation where the end cap 10 obstructs the light emission of the LED 1 disposed on the outermost side. Thereby, the lighting device 100 can provide suitable light emission even near the end of the housing 3.

In this way, in the first hole 123, the pair of covered wires constituting the power cable 4 are connected to each other, and in the second hole 125, the covered wires are disconnected and passed through the core. A method for manufacturing 12 is, for example, as follows. That is, for example, a mold with a shape matching the outer shape of the core 12 is prepared, the power cable 4 is fixed in the mold so as to be separated from the middle, and a resin or the like is poured into the mold and hardened. The child 12 may be formed.

<Action/Effect>
As described above, the end cap 10 according to the embodiment of the present disclosure has the second welding rib 116 for melting when welding the end cap 10 and the end of the housing 3, It is attached by high frequency welding to the end of the casing 3 housing the mounting board 2 on which the mounting board 2 is placed.

With this configuration, when the end cap 10 is attached to the housing 3, the molten second welding rib 116 enters the gap created between the end cap 10 and the housing 3 and hardens, thereby causing the end cap to close. The cap 10 and the housing 3 are firmly fixed to each other. Further, since the melted second welding rib 116 is inserted into the gap, the end cap 10 can sufficiently prevent water from entering the housing 3.

Furthermore, since the end cap 10 and the housing 3 are welded together by high frequency welding without physical vibration, the appearance of the welded area can be improved.

Furthermore, when the end cap 10 of the present disclosure is attached to the end of the housing 3, the end cap 10 is arranged on the outside of the LED 1 in the longitudinal direction of the housing 3 so as not to cover the LED 1 disposed on the outermost side. will be placed in

Such a configuration can avoid problems that may occur when the end cap 10 covers the LED 1. A problem that may occur when the end cap 10 covers the LED 1 is that, for example, when the LED 1 emits light, the color of the light that passes through the end cap 10 is slightly different from the color of the light that passes through the light emitting part 31 of the housing 3. This creates a sense of discomfort for the viewer.

The end cap 10 also includes an outer edge member 111 that contacts the end of the housing 3 when the end cap 10 is attached to the housing 3, a wall member 112 that isolates the outside and the inside of the housing 3, and an LED 1. The cap body 11 includes a hole 113 provided in the wall member 112 for passing the power cable 4 from outside to the inside of the casing 3, and the periphery of the power cable 4 is tightly attached to the power cable 4. It has a core 12 that supports the power cable 4 by covering it in a closed state, and is fitted into the hole 113 of the cap body 11 and welded to the cap body 11 by high frequency welding.

In this way, since the power cable 4 is passed from the outside to the inside of the housing 3 with the core 12 in close contact with the power cable 4, it is possible to prevent water from entering through the hole for passing the power cable 4. be able to. Furthermore, since the core 12 and the cap body 11 are welded by high frequency welding, it is possible to prevent water from entering between the cap body 11 and the core 12, and to improve the appearance of the welded part. be able to.

Further, when the power cable 4 is a parallel wire made of two wires arranged in parallel and covered with an insulating material, the core 12 has a bifurcated branch portion 127 that separates the parallel wire into two cores. Has it inside. With such a configuration, it is possible to avoid a situation where the power cable 4 obstructs the light emission of the LED 1 disposed on the outermost side of the housing 3 .

Further, a guide member 117 is formed on the inner wall surface of the cap body 11, which comes into contact with the side surface of the end of the housing 3 when the end cap 10 is attached to the housing 3. With such a configuration, the end cap 10 can be easily attached to the housing 3.

<Usage example>
A usage example of the lighting device 100 according to the embodiment described above will be described. 6A and 6B are diagrams for explaining a showcase 500 in which the lighting device 100 is used. FIG. 6A is a perspective view of the showcase 500, and FIG. 6B is a sectional view of the showcase 500 in the front-rear direction. In addition, in FIG. 6A and FIG. 6B, the side where the opening of the showcase 500 is provided is the front, and the opposite side is the back.

The showcase 500 is an open showcase installed in a store such as a supermarket or a convenience store, for example. The showcase 500 has a heat insulating back wall 501 provided on the back, a heat insulating side wall 502 attached to the side of the back wall 501, a bottom wall 503, and a ceiling wall 504.

A partition plate 505 is attached to the inside of the rear wall 501, and a duct is formed between the partition plate 505 and the like and the rear wall 501. In front of the lower end of the partition plate 505, a bottom plate 506 is attached between the bottom wall 503 of the rear wall 501, and the partition plate 505 and the bottom plate 506 constitute a display room 507. The inside of the display room 507 is cooled by a cooling device 508 and a blower 509.

In such a showcase 500, a lighting device 100 is attached to the lower surface of a canopy 510 provided so as to overhang in front of the ceiling wall 504, and to the lower surface of a shelf board 511 provided in the display room 507. . With this arrangement, the lighting device 100 can illuminate the inside of the display room 507 and the opening side of the showcase 500.

In addition, although the example shown in FIG. 6A and FIG. 6B demonstrated the case where the illuminating device 100 is used for an open showcase, the present invention is not limited to this. The lighting device 100 may be used in other types of showcases, display equipment, and the like.

The present disclosure is useful as a lighting device used for showcases and the like.

100 Lighting device 1 LED
1a Chip 1b Package 1c Sealing part 2 Mounting board 21 First surface 22 Second surface 3 Housing 31 Light emitting part 32 Side wall 33 Guide part 34 Bottom wall 4 Power cable 5 Connector 6 Terminal part 7 Connection terminal 8 Electronic component 10 End Cap 11 Cap body 111 Outer edge member 112 Wall member 113 Hole 114 First welding rib 115 Welding allowance 116 Second welding rib 117 Guide member 12 Core 121 Core body 122 First protrusion 123 First hole 124 Second protrusion Part 125 Second hole 126 Close contact surface 127 Branch 500 Showcase 501 Rear wall 502 Side wall 503 Bottom wall 504 Ceiling wall 505 Partition plate 506 Bottom plate 507 Display room 508 Cooling device 509 Air blower 510 Canopy 511 Shelf board

Claims (2)

A light emitting element,
a substrate on which the light emitting element is arranged;
a casing that houses the board;
a cap member welded to the end of the housing by high frequency welding;
a wall member provided on the cap member and covering the opening at the end of the casing;
an outer edge member provided on the cap member and facing an outer wall surface of the casing;
a welding part provided on the inner surface of the wall member and welding the cap member to the casing;
a protrusion that creates a gap between the outer wall surface of the housing and the inner wall surface of the outer edge member;
Equipped with
The protrusion is formed at a position that does not come into contact with a light emitting part that emits light emitted from the light emitting element to the outside of the casing.
lighting equipment. comprising the lighting device according to claim 1 ;
Showcase.