JP7129643B2 - CAP MEMBER, LIGHTING DEVICE, LIGHTING DEVICE MANUFACTURING METHOD, AND SHOWCASE - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a cap member, a lighting device, a manufacturing method of the lighting device, and a showcase.

2. Description of the Related Art Showcases for displaying articles have become popular mainly in stores such as supermarkets and convenience stores. In general, the interior of the showcase is equipped with a lighting device for illuminating the display room and the front of the showcase. In recent years, showcases employing LED lighting devices that use LEDs (Light Emitting Diodes) as light emitting elements have been developed.

Such a showcase is disclosed, for example, in Patent Document 1 and the like. Patent Literature 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-like sockets.

JP 2018-006211 A

For example, in a showcase equipped with a refrigerating 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 entering the interior of the lighting device, it is particularly necessary to provide sufficient waterproof performance to cap members that close both ends of the lighting device.

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, it has been difficult to obtain sufficient waterproof performance when screwing, for example, is used. In addition, for example, when an adhesive having waterproof performance is used, the adhesive is likely 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, changing the color of light transmitted through the vicinity of the cap member.

In view of such circumstances, an object of the present disclosure is to provide a cap member, a lighting device, a method for manufacturing the lighting device, and a showcase that can achieve both sufficient waterproof performance and good appearance. .

The cap member of the present disclosure is a cap member that is welded by high-frequency welding to the end of a housing that houses a substrate on which a light-emitting element is arranged, and is melted by high- frequency waves to separate the cap member and the housing. It has a welding part to be welded and a protrusion part to create a gap between the outer wall surface of the housing and the inner wall surface of the cap member .

A lighting device according to the present disclosure includes a light-emitting element, a substrate on which the light-emitting element is arranged, a housing for housing the substrate, and a cap member welded to an end of the housing by high-frequency welding , wherein the A wall member that covers an opening at an end, an outer edge member that faces an outer wall surface of the housing, and a welding portion that is provided on an inner surface of the wall member and welds the cap member and the housing. and a protrusion that creates a gap between the outer wall surface of the housing and the inner wall surface of the outer edge member .

A manufacturing method of an illumination method according to the present disclosure includes a wall member of a cap member that covers an end of the housing and an opening of the end of the housing of the lighting device that houses a substrate on which light emitting elements are arranged. attaching the cap member having a welded portion that creates a gap between itself and an inner surface, and a protrusion that creates a gap between it and an outer wall surface of the housing; a step of melting and causing the melted welded portion to flow into a gap created between the welded portion and the end portion of the housing, thereby welding the housing and the cap member together .

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

According to the present invention, both sufficient waterproof performance and good appearance can be achieved.

Plan view with a partially broken lighting device Cross-sectional view showing the inside of the housing of the lighting device Enlarged view of the connection part of the lighting device 2A is a front perspective view of the end cap, FIG. 2B is a front view of the end cap, FIG. 2C is a back perspective view of the end cap, and FIG. 2D is a back side of the end cap. 2E is a top view of the end cap; FIG. 3A is a perspective view of the cap body viewed from the front side, FIG. 3B is a front view of the cap body, FIG. 3C is a perspective view of the cap body viewed from the back side, and FIG. 3D is the back side of the cap body. FIG. 3E is a cross-sectional view taken along line AA in FIG. 3D. 4A is a perspective view of the core viewed from the front side, FIG. 4B is a front view of the core, FIG. 4C is a perspective view of the core viewed from the back side, and FIG. 4D is the back side of the core 4E is a partial perspective view from above of FIG. 4D; FIG. Plane enlarged view near the end cap of the lighting device Perspective view of showcase with lighting device Cross-sectional view in the front-rear direction of the showcase

Hereinafter, each embodiment of the present disclosure will be described in detail with reference to the drawings. However, more than necessary detailed description, for example, detailed description of already well-known matters and redundant description of substantially the same configuration may be omitted. It should be noted that the following description and referenced drawings are provided for the understanding of the present disclosure by those skilled in the art and are not intended to limit the scope of the claims of the present disclosure.

<Description of lighting device>
A lighting device 100 according to an embodiment of the present disclosure will be described with reference to FIGS. 1A to 1C. 1A is a partially broken plan view of lighting device 100, FIG. 1B is a cross-sectional view showing the inside of a housing of lighting device 100, and FIG. 1C is an enlarged view of a connecting portion of lighting device 100. FIG. In this specification, for the sake of convenience, the upward direction in FIG. 1B will be referred to as the upper side, and the downward direction in FIG. 1B will be referred to as the lower side. In this case, in FIGS. 1A and 1C, the front direction of the paper surface is the top, and the depth direction of the paper surface is the bottom.

The lighting device 100 has 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. LED 1 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 the mounting board 2 . The LED 1 includes an LED chip 1a, a package 1b, and a sealing portion 1c, as shown in FIG. 1C. The package 1b has a recess for accommodating the LED chip 1a. The sealing portion 1c fills the concave portion so as to cover the LED chip 1a. The sealing portion 1c is made of a translucent sealing material. Examples of translucent sealing materials include silicone resins, epoxy resins, and glass. The sealing portion 1c contains a phosphor that emits fluorescence when excited by light emitted from the LED chip 1a.

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

The mounting substrate 2 has a rectangular flat plate shape and an elongated outer shape, and is housed inside the housing 3 . In the following description, the surface of the mounting substrate 2 on which the LEDs 1 are mounted is referred to as a first surface 21 and the opposite surface is referred to as a second surface 22 .

Various wirings (not shown) are provided on the first surface 21 and/or the second surface 22 of the mounting substrate 2 . 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) penetrating 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 section 6, the connecting terminal 7, the electronic component 8, and the like.

On the first surface 21 of the mounting substrate 2, a plurality of LEDs 1 are mounted along the longitudinal direction in the central portion in the lateral direction. As a method for mounting the LED 1 on the mounting substrate 2, for example, solder is used. On the mounting board 2, the LEDs 1 are arranged at regular intervals. A plurality of LEDs 1 are electrically connected in series by wiring. The mounting board 2 is not limited to a configuration in which a plurality of LEDs 1 are electrically connected in series, and may be configured to be electrically connected in parallel or in series-parallel connection. Also, the number of LEDs 1 mounted on the mounting board 2 is not particularly limited in the present disclosure.

As shown in FIG. 1A, the terminal portion 6 is mounted on the first surface 21 side near the end portion of the mounting substrate 2 near the end cap 10 in the long axis direction. As shown in FIG. 1A, two terminal portions 6 are mounted along the width direction of the mounting board 2 .

When the total length of the mounting substrate 2 is shorter than that of the housing 3, a plurality of mounting substrates 2 may be accommodated in the housing 3 while being connected to each other in the longitudinal direction. It should be noted that the multiple mounting boards 2 being connected to each other means that the multiple mounting boards 2 are electrically and physically connected. Connection between the mounting substrates 2 is performed by connecting terminals 7 . Each LED 1 is arranged on the mounting board 2 so that the plurality of LEDs 1 mounted on the mounting board 2 are equidistantly spaced from each other along the longitudinal direction even when the plurality of mounting boards 2 are connected to each other. It is desirable to be Specifically, for example, it is desirable that the distance from the edge of the mounting board 2 to the LED 1 near the edge is approximately half the distance between the LEDs 1 adjacent to each other.

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

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 long axis direction. The housing 3 has a light emitting portion 31 , a pair of side walls 32 , a guide portion 33 and a bottom wall 34 .

The light emitting part 31 is provided on the first surface 21 side of the mounting board 2 so that the light emitted from the LED 1 can be emitted to the outside, and has translucency with respect to the light emitted from the LED 1. . The light emitting portion 31 has a substantially semi-cylindrical outer shape.

The pair of side walls 32 are formed integrally with the light emitting portion 31 so as to extend from both ends of the light emitting portion 31 . A guide portion 33 that contacts the mounting substrate 2 is formed on the side wall 32 . The mounting board 2 is accommodated inside the housing 3 in a state in which the LED 1 faces the light emitting portion 31 and both edges in the short direction are in contact with the guide portions 33 .

The bottom wall 34 is formed on the side of the housing 3 facing the light emitting portion 31 . The bottom wall 34 faces the second surface 22 of the mounting board 2 when the mounting board 2 is housed inside the housing 3 . The mounting substrate 2 is held by the bottom wall 34 and the guide portion 33 so as not to move inside the housing 3 .

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

The power cable 4 is a coated electric wire whose core wire is coated with an insulating coating member (vinyl or the like), 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 wires are covered and connected in parallel outside the housing 3, and two wires inside the housing 3. are separated while being covered and arranged at different positions. It should be noted that the parallel lines may be covered with an insulating film member by double covering.

The connector 5 is configured to be removable from a receptacle connector provided in a DC power supply (not shown) provided outside the lighting device 100 . A DC power supply device has, 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 substrate 2 , and are connected to a pair of covered electric wires forming the power cable 4 , respectively.

The connecting 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 substrate 2, for example, one connecting terminal 7 is a male terminal and the other connecting terminal 7 is a female terminal. The connecting terminals 7 can not only physically connect the mounting boards 2 but also electrically connect the wirings of the mounting boards 2 . As a result, when a plurality of mounting boards 2 are accommodated in the housing 3 while being connected to each other, power is transmitted to the 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 .

The electronic component 8 is a component mounted in a plurality of types on the mounting board 2 and controls the drive of the LED 1 . The electronic component 8 is mounted on the mounting board 2 by soldering, for example. Each electronic component 8 is electrically connected to a plurality of LEDs 1 via wiring. A plurality of types of electronic components 8 are electrically connected to each other to form a constant current circuit that supplies a constant current to the LED 1 . Examples of the electronic component 8 include resistors, transistors, and the like. The constant current circuit makes the current flowing through the LED 1 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 isolates the interior 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 a waterproof performance to prevent water from entering. The end cap 10 is formed in an outer shape slightly larger than the outer shape of the end of the housing 3 so that it can be attached to the end of the housing 3 . Details of the end cap 10 will now be described.

<Description of End Cap 10>
The end cap 10 will be described in detail below. In the following description, in a state in which the end cap 10 is attached to the housing 3 as shown in FIG. , the surface seen from the inside of the housing 3 is the rear surface of the end cap 10 .

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

The end cap 10 has a cap body 11 and a core 12, as shown in FIGS. 2A-2E. The cap main 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, 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 cores of electric wires joined together (parallel lines) on the front side of the end cap 10, and two cores on the back side of the end cap 10. are separated from each other.

<Description of 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. 3B is a front view of the cap body 11. FIG. FIG. 3C is a perspective view of the cap body 11 as seen from the rear side. 3D is a rear view of the cap body 11. FIG. FIG. 3E is a cross-sectional view taken along line AA in FIG. 3D.

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

Examples of the material of the cap main body 11 include polycarbonate resin, acrylic resin, and the like, similar to the case 3 . By forming the cap main body 11 from a hard resin, the overall thickness of the cap main body 11 (the distance from the end on the front side to the end on the back side) can be reduced from the viewpoint of strength compared to the case where the cap main body 11 is formed from soft resin. can do. Moreover, it is desirable that the cap main body 11 is formed of a transparent resin.

The outer edge member 111 is a member that contacts the outside of the end portion of the housing 3 to fix 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 9 mm as an example. 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 on the outermost side of the LED 1 in the longitudinal direction of the housing 3. LED1 is arranged further outside. 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 transmitted through the end cap 10 when the LED 1 emits light is slightly different from the color of the light transmitted through the light emitting portion 31 (see FIG. 1) of the housing 3. It may give the viewer a sense of incongruity. With the configuration described above, the present disclosure can avoid such a situation.

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 portion of the core 12 (the first projecting portion 122 shown in FIG. 4A and the like) is fitted into the hole 113 .

The first welding rib 114 melts in a state where the core 12 is fitted into the cap body 11, fills the gap between the cap body 11 and the end of the core 12, and hardens to separate the cap body 11 and the core. 12 are welded together. As shown in FIGS. 3D and 3E, first welding ribs 114 are provided at the edge of hole 113 . In this embodiment, high-frequency welding is used for welding the cap body 11 and the core 12 together. High-frequency welding is a technique in which materials are melted from the inside by dielectric heating using high-frequency waves, and is characterized in that the appearance of the welded parts is good because there is no physical vibration.

Around the hole 113 on the back side of the wall member 112, as shown in FIGS. 3C and 3D, there is a space for the first welding ribs 114 melted when the cap body 11 is welded to the core 12 to flow. A welding margin 115 is provided.

The second welding rib 116 melts when the cap body 11 (end cap 10) is attached to the end of the housing 3 (see FIG. 1A), and fills the gap between the cap body 11 and the end of the housing 3. It is a member for filling the gap, hardening, and welding the cap main 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 housing 3 contacts the wall member 112 while the cap body 11 is attached to the end of the housing 3 . Specifically, the second welding rib 116 is arranged near the outer edge member 111 on the rear side of the wall member 112, as shown in FIGS. 3C and 3D. 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 confirm whether or not the cap main body 11, the core 12 and the housing 3 are suitably welded.

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

In addition, when the end cap 10 is attached to the housing 3, the guide member 117 is in a state in which the tip portion of the guide member 117 is in contact with the side surface of the end portion of the housing 3 (the outer wall surface of the end portion). Friction can help secure the end cap 10 to the housing 3 .

As shown in FIGS. 3C and 3D, the guide member 117 is formed so as 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 can be attached to the housing 3. When attached, a minute gap can be secured between the wall member 112 of the cap body 11 and the side surface of the end of the housing 3 . For example, an adhesive may be poured into this gap. In this case, the end cap 10 should not come off from the housing 3 until it is welded after the end cap 10 is attached to the housing 3. can be fixed.

As shown in FIG. 3D, the guide member 117 is provided substantially only on 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 portion 31 (see FIG. 1B) when the end cap 10 is attached to the housing 3 . The reason for this is to avoid a situation in which the light hits the guide member 117 and is scattered when the LED 1 emits light with the end cap 10 attached to the housing 3 . If the guide member 117 is provided on the upper side of the cap main body 11, the light emitted from the LED 1 is scattered by the guide member 117, and the color of the scattered light, the direction of emission to the outside of the housing 3, etc. may differ from the light emitted from the light emitting portion 31 . Such a situation can be prevented by forming the guide member 117 at a portion not in contact with the light emitting portion 31 .

When the end cap 10 and the housing 3 are welded by high frequency, the guide member 117 may be slightly melted and used for the welding.

<Description of core 12>
4A to 4E are diagrams for explaining the core 12. FIG. 4A to 4E also show a portion of the power cable 4 held by the core 12 for the sake of explanation. FIG. 4A is a perspective view of the core 12 viewed from the front side. 4B is a front view of the core 12. FIG. FIG. 4C is a perspective view of the core 12 viewed from the rear side. 4D is a rear view of the core 12. FIG. FIG. 4E is a partial perspective view of FIG. 4D viewed from above.

As shown in FIG. 4A, 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. As shown in FIG.

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

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

A first hole 123 is provided substantially at the center of the first projecting portion 122 . The first hole 123 is a hole for passing the power cable 4 . The power cable 4 passed through the first hole 123 is a parallel wire in which two wires are connected to each other by a covering member (vinyl or the like). Therefore, the first hole 123 has a shape that matches the outline of such parallel lines.

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

That is, the power cable 4 held by the core 12 is in a state of parallel wires in which two wires are covered and connected in parallel in the first hole 123, and two wires are connected in the second hole 125. are separated with the wires covered. Such arrangement of the power cable 4 is achieved by a branch 127 provided inside the core 12, shown in FIG. 4E. The branch portion 127 has a bifurcated shape, and the power cable 4 is in a state of parallel lines between the first hole 123 and the branch portion 127, and between the branch portion 127 and the second hole 125. In between, two core electric wires are separated.

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

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 near the end of the mounting board 2 , the outermost LEDs 1 in the housing 3 can be arranged between the separated two-core power cables 4 . Therefore, it is possible to avoid a situation where the light emission of the LED 1 arranged on the outermost side of the housing 3 is blocked by the power cable 4 .

As shown in FIG. 5, when the end cap 10 is attached to the housing 3, the cap main body 11 and the core 12 are arranged outside the outermost LED 1 in the housing 3. It is arranged so that it is not covered. As a result, it is possible to avoid a situation in which the end cap 10 prevents the light emission of the LED 1 arranged on the outermost side. Thereby, the illumination device 100 can provide suitable light emission even near the end of the housing 3 .

In this way, the pair of covered wires constituting the power cable 4 are connected to each other in the first hole 123, and the core is passed through the second hole 125 in a state in which the connection of the covered wires is cut off. A method for manufacturing 12 is, for example, as follows. That is, for example, a mold having a shape that matches 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 resin or the like is poured into the mold and hardened, thereby child 12 should 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 the end cap 10 and the end of the housing 3 are welded together. is attached by high-frequency welding to the end of the housing 3 that accommodates the mounting board 2 on which is arranged.

With such a configuration, when the end cap 10 is attached to the housing 3, the melted second welding rib 116 enters into the gap between the end cap 10 and the housing 3 and hardens to form an end. The cap 10 and the housing 3 are firmly fixed to each other. In addition, since the melted second welding rib 116 enters 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 portion can be improved.

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

Such a configuration avoids problems that may arise 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 the color of the light transmitted through the end cap 10 when the LED 1 emits light is slightly different from the color of the light transmitted through the light emitting portion 31 of the housing 3. It is to give a sense of incongruity to the viewer.

In addition, the end cap 10 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 separates the outside and the inside of the housing 3, and an LED 1. A cap body 11 having a hole 113 provided in a wall member 112 for passing the power cable 4 that supplies power to the housing 3 from the outside to the inside, and the power cable 4 is tightly attached to the power cable 4. A core 12 is fitted in a hole 113 of a cap body 11 and welded to the cap body 11 by high-frequency welding.

Since the power cable 4 is passed from the outside to the inside of the housing 3 while the core 12 is in close contact with the power cable 4, it is possible to prevent water from entering through the hole through which the power cable 4 is passed. be able to. In addition, 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 improve the appearance of the welded portion. be able to.

In addition, when the power cable 4 is a parallel wire in which two wires arranged in parallel are coated with an insulating member, the core 12 has a bifurcated branch portion 127 that separates the parallel wire into two wires. have it inside. With such a configuration, it is possible to avoid a situation where the light emission of the LED 1 arranged on the outermost side of the housing 3 is blocked by the power cable 4 .

A guide member 117 is formed on the inner wall surface of the cap main body 11 so as to come into contact with the side surface of the end portion 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 illumination device 100 according to the above-described embodiment will be described. 6A and 6B are diagrams for explaining a showcase 500 in which lighting device 100 is used. 6A is a perspective view of the showcase 500, and FIG. 6B is a cross-sectional view of the showcase 500 in the front-rear direction. 6A and 6B, the side on which the opening of the showcase 500 is provided is the front, and the opposite side is the rear.

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

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

In such a showcase 500, the illumination device 100 is attached to the lower surface of the canopy 510 provided to protrude forward from the ceiling wall 504 and the lower surface of the shelf board 511 provided in the display room 507. . With such an 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 describes the case where the lighting device 100 is used in an open showcase, the present invention is not limited to this. Lighting device 100 may be used in other types of showcases, display equipment, and the like.

INDUSTRIAL APPLICABILITY The present disclosure is useful as lighting devices used in showcases and the like.

100 lighting device 1 LED
1a chip 1b package 1c sealing portion 2 mounting substrate 21 first surface 22 second surface 3 housing 31 light emitting portion 32 side wall 33 guide portion 34 bottom wall 4 power cable 5 connector 6 terminal portion 7 connecting terminal 8 electronic component 10 end Cap 11 Cap main body 111 Outer edge member 112 Wall member 113 Hole 114 First rib for welding 115 Welding margin 116 Second rib for welding 117 Guide member 12 Core 121 Core body 122 First protrusion 123 First hole 124 Second protrusion Part 125 Second hole 126 Contact surface 127 Branching part 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 Blower 510 Canopy 511 Shelf plate

Claims (6)

A cap member that is welded by high-frequency welding to the end of a housing that houses a substrate on which a light emitting element is arranged,
a welding part that melts with a high frequency and welds the cap member and the housing;
a protrusion that creates a gap between an outer wall surface of the housing and an inner wall surface of the cap member;
a cap member. The cap member is made of a transparent material,
The cap member according to claim 1. The cap member is
an outer edge member including the inner wall surface;
a wall member covering the opening at the end of the housing;
further comprising
The welded portion is formed on an inner surface of the wall member,
The cap member according to claim 1 or 2. a light emitting element;
a substrate on which the light emitting element is arranged;
a housing for housing the substrate;
A cap member welded to the end of the housing by high-frequency welding ,
a wall member that covers the opening at the end of the housing while attached to the housing;
an outer edge member facing the outer wall surface of the housing;
a welding portion provided on the inner surface of the wall member and welding the cap member and the housing;
a cap member having a protrusion that creates a gap between an outer wall surface of the housing and an inner wall surface of the outer edge member ;
lighting device. At the end of the housing of the lighting device that houses the substrate on which the light emitting element is arranged , a gap is formed between the end of the housing and the inner surface of the wall member of the cap member that covers the opening of the end. a step of attaching the cap member having a welded portion that allows the welding portion to be formed and a projection portion that creates a gap between the outer wall surface of the housing;
A step of melting the welded portion with a high frequency , causing the melted welded portion to flow into a gap formed between the welded portion and the end portion of the housing, and welding the housing and the cap member together. and
A method of manufacturing a lighting device, comprising: Having the lighting device according to claim 4 ,
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