JP2022085262A - Led lighting fixture - Google Patents

Abstract

To provide an LED lighting fixture capable of efficiently melting snow and frost attached to a translucent cover without impairing the degree of freedom in design of a device to which it is applied.SOLUTION: An LED lighting fixture includes a case body, a translucent cover, and a plurality of LED modules. The LED module includes: a plurality of bus bars arranged side by side via an interval on the same plane; an insulating film or an insulator of an insulator layer for connecting a plurality of bus bars; a singular or a plurality of LED elements mounted on a first surface side connection part of a part of the bus bars; an electric connection member for electrically connecting the LED element and the first surface side connection part of the remaining bus bars; and a highly heat conductive frame body fixed to the insulator so as to surround the plurality of LED elements in a plan view. Between the frame body and the cover, the highly heat conductive elastic member is interposed, and at the cover, a highly heat conductive heat conductor is provided at least at a part of a region with which a first side on one side of the elastic body is engaged.SELECTED DRAWING: Figure 4

Description

The present invention relates to LED lamps such as traffic traffic lights, vehicle head lamps, and vehicle rear lamps that use LED elements as a light source.

The LED element is superior in energy efficiency to the incandescent light bulb, and an LED lighting tool using the LED element as a light source instead of the incandescent light bulb is used as a traffic signal or a lighting tool for a vehicle.

On the other hand, since the LED element generates less heat than a white bulb, snow and frost tend to adhere to the translucent cover of the LED lamp, and the once attached snow and frost are in a normal use state. There is a disadvantage that it is difficult to remove.

In this regard, for example, an LED lamp having an LED element, a casing main body accommodating the LED element, and a translucent cover attached to the casing main body, to which a current control resistor of the LED element is attached. A configuration has been proposed in which the substrate is fixed to the outer surface of the casing body, and the substrate and the translucent cover are connected by a metal wire (hereinafter referred to as the conventional configuration 1; see Patent Document 1 below).

Conventional configuration 1 melts snow and frost adhering to the translucent cover by utilizing the heat generated by the current control resistor when energized. Therefore, the substrate to which the current control resistor is attached is described above. It should be placed near the casing. Therefore, there is a problem that the presence of the substrate impairs the degree of freedom in designing a device such as a vehicle to which the LED lamp is applied.

Further, as another configuration (hereinafter referred to as the conventional configuration 2), the LED lighting device includes an LED element, a casing body for accommodating the LED element, and a translucent cover attached to the casing body, and is an LED element. A heat sink is provided to dissipate the heat generated by the LED element to the vehicle interior side different from the light radiation direction of the LED element, and the outer surface of the translucent cover covering the LED element is more than the translucent cover. An LED lamp has been proposed in which a thermoelectric conductor having high thermal conductivity is provided so that the heat sink and the thermal conductor can be connected (see Patent Document 2 below).

Also in this conventional configuration 2, it is necessary to dispose the heat sink in the vicinity of the LED element, and there is a problem that the presence of the heat sink impairs the design freedom of a device such as a vehicle to which the LED lamp is applied. ..

Japanese Unexamined Patent Publication No. 2003-08518 Japanese Unexamined Patent Publication No. 2009-187707

The present invention has been made in view of such a prior art, and is an LED lamp using an LED element as a light source, and the passage of light emitted by the LED element without impairing the design freedom of the applied device. It is an object of the present invention to provide an LED lamp that can efficiently melt snow and frost adhering to the translucent cover.

In order to achieve the above object, the first aspect of the present invention is a case body provided with an opening, a translucent cover connected to the case body so as to close the opening, and the translucent cover. A plurality of LED modules housed in the case body so that light is radiated outward through the case body, the LED modules are formed of a conductive flat plate-like member, and a gap is provided between facing side surfaces. A plurality of bus bars arranged in the same plane in an existing state are adhered to a first surface on one side in the thickness direction of the plurality of bus bars so as to straddle the gap, and the plurality of bus bars are present in the gap. An insulating resin film forming a connected bus bar connector, the first surface side connection portion of each of the plurality of bus bars is exposed by exposing a predetermined region of the first surface of each of the plurality of bus bars. An insulating resin film provided with one or more first surface side openings forming the element body, and a first electrode layer and a second electrode arranged on one side and the other side in the thickness direction of the element body and the element body, respectively. One or more LED elements having a layer, wherein the second electrode layer is attached in a state of being electrically connected to the first side connection portion in a part of the plurality of bus bars, and the said. From the one or more LED elements in which the first electrode layer is electrically connected to the first surface side connection portion in the remaining bus bar of the plurality of bus bars via an electrical connection member, and the translucent cover. Also has an annular frame in a plan view formed by a high thermal conductive member, which is fixed to the peripheral edge of the insulating resin film while surrounding the one or more LED elements in a plan view. However, between the first surface on one side of the frame in the thickness direction and the inner surface of the translucent cover, there is an annular-shaped elastic member that surrounds the one or more LED elements in a plan view. An elastic member formed by a heat conductive member is inserted more than the translucent cover, and the first side of the inner surface of the translucent cover on one side in the axial direction of the elastic member is in contact with the inner surface. Provided are LED lamps provided with a heat conductor formed by a heat conductive member having a higher heat conductivity than the translucent cover in at least a part of the region.

In order to achieve the above object, the second aspect of the present invention includes a case body provided with an opening, a translucent cover connected to the case body so as to close the opening, and the translucent cover. A plurality of LED modules housed in the case body so that light is radiated outward through the case body, the LED module is formed of a conductive flat plate-like member, and a gap is provided between facing side surfaces. A first surface that covers a plurality of bus bars arranged in the same plane in an existing state, a gap filling portion filled in the gap, and a first surface on one side in the thickness direction of a bus bar connecting portion connected by the gap filling portion. It is an insulating layer integrally including a one-side laminated portion and is formed by an insulating resin coating film, and a predetermined region of the first surface of each of the plurality of bus bars is exposed to expose the predetermined region of the plurality of bus bars. An insulating layer provided with one or more first surface side openings forming each first surface side connection portion, and a first element main body and a first arranged on one side and the other side in the thickness direction of the element main body, respectively. A state in which one or more LED elements having an electrode layer and a second electrode layer, the second electrode layer being electrically connected to the first surface side connection portion in a part of the plurality of bus bars. And the first electrode layer is electrically connected to the first surface side connection portion of the remaining bus bar of the plurality of bus bars via an electrical connection member with one or more LED elements. An annular frame in a plan view formed by a member having a higher thermal conductivity than the translucent cover, and the peripheral edge of the first surface side laminated portion in a state of surrounding the one or a plurality of LED elements in a plan view. It has a frame body fixed to the frame body, and surrounds the one or more LED elements in a plan view between the first surface of the frame body on one side in the thickness direction and the inner surface of the translucent cover. An annularly shaped elastic member in which an elastic member formed by a heat conductive member rather than the translucent cover is interposed, and the axial direction of the elastic member on the inner surface of the translucent cover. Provided is an LED lighting fixture provided with a heat conductor formed by a heat conductive member having a higher heat conductivity than the translucent cover in at least a part of a region to which the first side on one side is abutted.

In the LED lamp according to the second aspect, preferably, the insulating layer integrally includes a second surface side laminated portion and a side surface side laminated portion that cover the second surface and the side surface on the other side in the thickness direction of the bus bar connector, respectively. Can have in.

In this case, a predetermined region of the second surface on the other side in the thickness direction of each of the plurality of bus bars is exposed on the second surface side laminated portion, and the second surface side connection portion of each of the plurality of bus bars is exposed. One or more second side openings forming the above are provided.

In various configurations of the LED lamp according to the present invention, the elastic member is preferably a coil spring.

In various configurations of the LED lamp according to the present invention, for example, the translucent cover may have a plurality of slit groups provided for each of the plurality of LED modules.

Each of the plurality of slit groups is a plurality of slits penetrating between the outer surface and the inner surface of the translucent cover, and is arranged in series along the plan view annular shape of the elastic member in the corresponding LED module. It is assumed that the heat conductor includes a plurality of slits in which a non-slit region is provided between one adjacent slit and the other slits, and the heat conductor is fitted into each of the plurality of slits. It is assumed to have a heat conductive member of.

Instead, the translucent cover may have an annular groove on its inner surface that follows the planar annular shape of the elastic member.
In this case, the thermal conductor is fitted into the annular groove.
The thermal conductor may be a single member or a plurality of members.

In various configurations of the LED lamp according to the present invention, it is preferable that the heat conductor has a heat conductor side engaging groove along the plan view annular shape of the elastic member on the inner surface.
In this case, the first side of the elastic member on one side in the axial direction is engaged with the heat conductor side engaging groove.

Instead, the heat conductor may have a heat conductor side engaging projection on the inner surface that follows the annular shape of the elastic member in a plan view.
In this case, the first side of the elastic member on one side in the axial direction is extrapolated to the heat conductor side engaging projection.

In various configurations of the LED lamp according to the present invention, preferably, the frame body may have a frame body side engaging groove along the plan view annular shape of the elastic member on the first surface.
In this case, the second side of the elastic member on the other side in the axial direction is engaged in the frame side engaging groove.

Instead of this, the frame body may have a frame body side engaging protrusion along the plan view annular shape of the elastic member on the first surface.
In this case, the second side of the elastic member on the other side in the axial direction is externally inserted into the frame-side engaging projection.

In various configurations of the LED lamp according to the present invention, preferably, the second side of the elastic member on the other side in the axial direction is fixed to the first surface of the frame body.

In various configurations of the LED lamp according to the present invention, preferably, the LED module is a translucent seal provided in a space defined by the frame so as to surround the LED element and the electrical connection member. It may have a resin body.

According to the LED lamp according to the present invention, the heat generated during the operation of the LED element is utilized without impairing the design freedom of the device to which the LED lamp is applied, and the light is transmitted through the LED element as a path for radiated light. The snow and frost adhering to the sex cover can be efficiently melted.

FIG. 1 is a front view of the LED lamp according to the first embodiment of the present invention. FIG. 2 is an enlarged view of part II in FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is an enlarged view of part IV in FIG. FIG. 5 is a cross-sectional view taken along the line VV in FIG. 6 (a) and 6 (b) are a plan view of a bus bar connector forming an LED module in the LED lamp according to the first embodiment and a cross-sectional view taken along the line VI-VI in FIG. 6 (a), respectively. Is. FIG. 6 (c) is a plan view of a modified example of the bus bar connection. FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. FIG. 8 is a vertical sectional view of the LED lamp according to the first modification of the embodiment. FIG. 9 is a cross-sectional view taken along the line IX-IX in FIG. FIG. 10 is a vertical sectional view of the LED lamp according to the second modification of the first embodiment. FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. FIG. 12 is a vertical sectional view of the LED lamp according to the third modification of the first embodiment. FIG. 13 is a cross-sectional view taken along the line XIII-XIII in FIG. FIG. 14 is a partial vertical sectional view of the LED lamp according to the second embodiment of the present invention, and is a vertical sectional view corresponding to FIG. 4. 15 (a) to 15 (c) are a plan view of a bus bar connector forming an LED module in the LED lamp according to the second embodiment, and a cross-sectional view taken along the line XV-XV in FIG. 15 (a). It is a bottom view of the bus bar connector.

Embodiment 1
Hereinafter, an embodiment of the LED lamp according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a front view of the LED lamp 1 according to the present embodiment.
Further, FIG. 2 shows an enlarged view of part II in FIG.
Further, FIG. 3 shows a cross-sectional view taken along the line III-III in FIG.

As shown in FIGS. 1 and 2, the LED lamp 1 is in the form of a traffic signal.
As a matter of course, the LED lamp according to the present invention can take various forms such as a vehicle headlamp and a vehicle rear lamp as long as the ED element is used as the light source.

As shown in FIGS. 1 to 3, the LED lamp 1 includes a case body 10 provided with an opening 18, and a translucent cover 20 connected to the case body 10 so as to close the opening 18. It includes a plurality of LED modules 100 housed in the case body 10 so that light is radiated outward through the translucent cover 20.

The translucent cover 20 is formed of a translucent resin such as a polycarbonate resin capable of transmitting light from the LED module 100.

FIG. 4 shows an enlarged view of part IV in FIG.
Further, FIG. 5 shows a cross-sectional view taken along the line VV in FIG.

As shown in FIGS. 4 and 5, the LED module 100 includes a plurality of bus bars 110 formed of a conductive flat plate-shaped member and arranged in the same plane with a gap 119 between facing side surfaces thereof. The plurality of bus bars 110 are adhered to the first surface 111 on one side in the thickness direction so as to straddle the gap 119, and the plurality of bus bars 110 are connected in a state where the gap 119 is present to form a bus bar connecting body. It has an insulating resin film 120.

FIG. 6A shows a plan view of the bus bar connection body.
Further, FIG. 6 (b) shows a cross-sectional view taken along the line VI-VI in FIG. 6 (a).

The bus bar 10 is formed of a conductive metal such as Cu.
In the present embodiment, as shown in FIGS. 4 to 6, the LED module 100 has three bus bars of the first to third bus bars 110 (1) to 110 (3) as the plurality of bus bars 110. As the gap 119, the first and second gaps 119 (1) and 119 (2) are provided.

That is, the LED module 100 includes the first bus bar 110 (1) and the second bus bar 110 (2) arranged adjacent to the first bus bar 110 (1) via the first gap 119 (1). It has a third bus bar 110 (3) arranged adjacent to the second bus bar 110 (2) via the second gap 119 (2).

The insulating resin film 120 is made of various materials having insulating properties and having strength capable of connecting the plurality of bus bars 110, and polyamide-imide is preferably used.

As shown in FIGS. 6A and 6B, the insulating film 120 has a predetermined region of the first surface 111 of each of the first to third bus bars 110 (1) to 110 (3). The three first surface side openings 122 (1) to 122 (3) forming the first surface side connection portion 112 of each of the first to third bus bars 110 (1) to 110 (3) by exposing the first to third bus bars 110 (1) to 110 (3). It is provided.

Instead, as shown in FIG. 6 (c), the insulating film 120 is simply so as to straddle all the first surfaces 111 of the first to third bus bars 110 (1) to 110 (3). It is also possible to provide one first surface side opening 122 to form the first surface side connection portion 112 of each of the first to third bus bars 110 (1) to 110 (3).

As shown in FIGS. 4 and 6 (b), in the present embodiment, the second surface 113 on the other side in the thickness direction of the first to third bus bars 110 (2) is exposed as a whole, and the second surface 113 is exposed. The entire two-sided 113 forms the second-sided connecting portion 114.
The second surface side connection portion 114 acts as an external connection terminal for electrically connecting the first to third bus bars 110 (1) to 110 (3) to the outside.

As a matter of course, the second surface side insulation is provided on the second surface 113 of the first to third bus bars 110 (1) to 110 (3) so as to straddle the first and second gaps 119 (1) and 119 (2). It is also possible to adhere a sex resin film (not shown).

In this case, the second surface side insulating resin film is exposed to a predetermined region of the second surface 113 of each of the first to third bus bars 110 (1) to 110 (3) to expose the first surface. One or a plurality of second surface side openings forming the second surface side connection portions 114 of each of the third bus bars 110 (1) to 110 (3) are provided.

As shown in FIGS. 4 and 5, the LED module 100 further includes the plurality of bus bars 110 (in the present embodiment, the first to third bus bars 110 (1) to 110 (3)). One or more LED elements 150 mounted on the first surface side connection portion 112 of a part of the bus bars (in the present embodiment, the first and second bus bars 110 (1) and 110 (2)) (the present embodiment). In the embodiment, the first and second LED elements 150 (1), 150 (2)) and the one or more LED elements 150 in a plan view (in the present embodiment, the first and second LED elements 150 (1). ), 150 (2)), and the insulating resin film 120 has an annular frame body 130 fixed to the peripheral edge of the first surface on one side in the thickness direction.

The LED element 150 has an element main body 155 and a first electrode layer 151 and a second electrode layer 152 disposed on one side and the other side in the thickness direction of the element main body 155, respectively.

The first LED element 150 (1) is mounted in a state where the second electrode layer 152 is electrically connected to the first side connection portion 112 of the first bus bar 110 (1) corresponding to the second electrode layer 152, and the second LED element 150 (1) is attached. The 150 (2) is mounted in a state where the second electrode layer 152 is electrically connected to the first side connecting portion 112 of the second bus bar 110 (2) corresponding to the second electrode layer 152.

On top of that, as shown in FIGS. 4 and 5, the first electrode layer 151 of the first LED element 150 (1) is a residual bus bar to which the LED element 150 is not mounted (third in the present embodiment). It is electrically connected to the first surface side connecting portion 112 of the bus bar 110 (3)) via a first electrical connecting member 160 (1) such as a wire.

Similarly, the first electrode layer 151 of the second LED element 150 (2) has a wire or the like connected to the first surface side connecting portion 112 of the remaining bus bar (in the present embodiment, the third bus bar 110 (3)). It is electrically connected via the second electrical connection member 160 (2).

The frame 130 has a rigidity capable of holding the bus bar connector in cooperation with the insulating resin film 120, and is formed of a member having a higher thermal conductivity than the translucent cover 20.

Preferably, the frame 130 is made of a metal such as Cu, stainless steel, or aluminum, and more preferably, it is made of the same material as the bus bar 10.

As shown in FIG. 4, in the present embodiment, the LED module 100 further includes the LED element (in the present embodiment, the first and second LED elements 150 (1), 150 (2)) and the LED element. The space defined by the frame 130 is filled so as to surround the electrical connection member (in the present embodiment, the first and second electrical connection members 160 (1) and 160 (2)). It has a sealing resin body 170.

The sealing resin body 170 is formed of a resin material capable of transmitting light radiated from the LED element 150, for example, a translucent resin material such as polyimide, polyamide, or epoxy.

In the LED module 100, among the plurality of bus bars 110, the bus bar to which the LED element 150 is mounted (in the present embodiment, the first and second bus bars 110 (1)) is the positive electrode side electrode and the negative electrode side electrode. On the other hand (for example, the positive electrode side electrode), the remaining bus bar of the plurality of bus bars 110 to which the LED element 150 is not mounted (in the present embodiment, the third bus bar 110 (3)) acts as the first electrode. ) Acts as a second electrode which is the other of the positive electrode side electrode and the negative electrode side electrode (for example, the negative electrode side electrode).

As described above, the second surface side connection portions 114 of the first to third bus bars 110 (1) to 110 (3) act as external connection terminals.

As shown in FIGS. 4 and 5, in the present embodiment, the case main body 10 has the plurality of bus bars 110 (the present embodiment) when the LED module 100 is installed in the case main body 10. In the first to third bus bars 110 (1) to 110 (3)), a plurality of conductive members 40 electrically connected to the second surface side connecting portions 114 (the first in the present embodiment). -Third conductive members 40 (1) to 40 (3)) are provided.

The conductive member 40 is electrically connected to the second surface side connecting portion 114 of the corresponding bus bar 110 in a state of being insulated from the case body 10, and acts as an electrical connection relay member with the outside. ..

In the present embodiment, the first and second bus bars 110 (1) and 110 (2) act as the first electrode, and the third bus bar 110 (3) acts as the second electrode. ing.

Therefore, the second surface side connecting portion 114 of the first and second bus bars 110 (1) and 110 (2) is connected to a single common conductive member, and the second surface of the third bus bar 110 (3) is connected. It is also possible to deform the side connecting portion 114 so as to connect it to another conductive member.

FIG. 7 shows a cross-sectional view taken along the line VII-VII in FIG.
As shown in FIGS. 4, 5 and 7, the LED lamp 1 according to the present embodiment further includes an elastic member 50 and a heat conductor 60.

The elastic member 50 has an annular shape in a plan view so as to surround the one or more LED elements (in the present embodiment, the first and second LED elements 150 (1) and 150 (2)) in a plan view. It is interposed between the first surface of the frame 130 on one side in the thickness direction and the inner surface of the translucent cover 20.

The thermal conductor 60 is provided in at least a part of the inner surface of the translucent cover 20 where the first side of the elastic member 50 on one side in the axial direction is in contact with the inner surface.

The elastic member 50 and the thermal conductor 60 are formed of a member having higher thermal conductivity than the translucent cover 20, and are formed of, for example, a metal such as Cu, stainless steel, spring steel, or aluminum.

According to the LED lamp 1 having such a configuration, the conventional LED lamp does not include a substrate with a resistor or a heat sink provided in the vicinity of the LED lamp, and the LED element (in the present embodiment). The heat generated during the operation of the first and second LED elements 150 (1) and 150 (2) is transferred through the frame 130 formed by the high thermal conductive member, the elastic member 50, and the thermal conductor 60. It can be efficiently transmitted to the translucent cover 20.

Therefore, the snow and frost adhering to the translucent cover 20 can be efficiently melted without impairing the design flexibility of the device to which the LED lamp 1 is attached or applied.

Further, since heat is transferred between the frame body 130 and the heat conductor 60 provided on the translucent cover 20 by the elastic member 50, the relationship between the frame body 130 and the elastic member 50 is engaged. The coupling relationship and the engagement relationship between the elastic member 50 and the thermal conductor 60 can be well maintained.

As shown in FIG. 4 and the like, in the present embodiment, the elastic member 50 is a coil spring.
Instead of this, a leaf spring or an accordion spring can be used as the elastic member 50.

Preferably, the elastic member 50 can be fixed to either the frame body 130 or the heat conductor 60 provided on the translucent cover 20.
That is, the first side of the elastic member 50 on one side in the axial direction is fixed to the inner surface of the thermal conductor 60 provided on the translucent cover 20, or the other side in the axial direction of the elastic member 50 is fixed. The second side of the frame 30 can be fixed to the frame body 30.
According to such a configuration, it is possible to improve the efficiency of the assembly work of the case body 10 and the translucent cover 20 in a state where the plurality of LED modules 100 are housed.

As shown in FIGS. 2, 4, 7, 7 and the like, in the present embodiment, the translucent cover 20 has a plurality of slit groups 30 provided for each of the plurality of LED modules 100. Have.

Each of the plurality of slit groups 30 has a plurality of slits 32 penetrating between the outer surface and the inner surface of the translucent cover 20 (in the present embodiment, the first to fourth slits 32 (1) to 32). (4)). The plurality of slits 32 are arranged in series with a gap (non-slit region) 34 along the plan view annular shape of the elastic member 50 in the corresponding LED module 100 (that is, one adjacent slit 32). A gap (non-slit region) 34 is provided between the slit 32 and the other slits 32).

The heat conductor 60 is a plurality of heat conductive members 62 fitted into the plurality of slits 32 (in the present embodiment, the first to fourth heat conductive members 62 (1) to 62 (4)). have.

FIG. 8 is a vertical cross-sectional view of the LED lamp 2A according to the first modification of the present embodiment, and shows a vertical cross-sectional view corresponding to FIG. 4.
Further, FIG. 9 shows a cross-sectional view taken along the line IX-IX in FIG.

The LED lamp 2A according to the first modification relates to the present embodiment only in that the translucent cover 20 and the heat conductor 60 are changed to the translucent cover 25 and the heat conductor 65. It is different from the LED lamp 1.

As shown in FIGS. 8 and 9, the translucent cover 25 has an annular groove 35 on the inner surface along the plan view annular shape of the elastic member 50.

The thermal conductor 65 is fitted in the annular groove 35.
In this case, the thermal conductor 65 may be an annular single member (see FIG. 9) corresponding to the annular groove 35, or may be a plurality of members divided into a plurality of members.

FIG. 10 is a vertical cross-sectional view of the LED lamp 2B according to the second modification of the present embodiment, and shows a vertical cross-sectional view corresponding to FIG. 4.
Further, FIG. 11 shows a cross-sectional view taken along the line XI-XI in FIG.
In the figure, the same members as those in the present embodiment and the first modification are designated by the same reference numerals.

The LED lamp 2B according to the second modification is the first in that the heat conductor 65 is changed to the heat conductor 70 and the LED module 100 is changed to the LED module 100B. It is different from the LED lamp 2A according to the modified example.

As shown in FIGS. 10 and 11, the heat conductor 70 has a heat conductor side engaging groove 72 along the plan view annular shape of the elastic member 50 on the inner surface, and the elastic member 50 has a heat conductor side engaging groove 72. The first side on one side in the axial direction is engaged in the heat conductor side engaging groove 72.
According to such a configuration, the engagement between the elastic member 50 and the heat conductor 70 can be well maintained.

The LED module 100B is different from the LED module 100 only in that the frame 130 is changed to the frame 180.

As shown in FIG. 10, the frame body 180 has a frame body side engaging groove 182 along the plan view annular shape of the elastic member 50 on the first surface, and the other side in the axial direction of the elastic member 50. The second side of the frame is engaged in the frame side engagement groove.
According to such a configuration, the engagement between the elastic member and the frame body can be well maintained.

FIG. 12 is a vertical cross-sectional view of the LED lamp 2C according to the third modification of the present embodiment, and shows a vertical cross-sectional view corresponding to FIG.
Further, FIG. 13 shows a cross-sectional view taken along the line XIII-XIII in FIG.
In the figure, the same members as in the present embodiment, the first modification and the second modification are designated by the same reference numerals.

In the LED lamp 2B according to the third modification, the heat conductor 60 is changed to the heat conductor 75, and the LED module 100 is changed to the LED module 100C. It is different from the LED lamp 1 according to the form.

The heat conductor 75 is a plurality of heat conductive members 77 (first to fourth heat conductive members) fitted into the plurality of slits 32 (the first to fourth slits 32 (1) to 32 (4)), respectively. It has 77 (1) to 77 (4)).

The inner surface of each of the plurality of heat conductive members 77 is a reference surface 78 to which the first side of the elastic member 50 on one side in the axial direction is engaged, and the other side in the axial direction from the reference surface 78 (the LED module 100C). It has a heat conductor side engaging protrusion 79 projecting in a direction (in a direction close to).

The heat conductor side engaging protrusions 79 of the first to fourth heat conductive members 77 (1) to 77 (4) are arranged so as to follow the annular shape in a plan view of the elastic member 50, and the elastic member 50. The first side on one side in the axial direction of the above is externally attached to the heat conductor side engaging projections of the first to fourth heat conductive members 77 (1) to 77 (4).
Even in such a configuration, the engagement between the elastic member 50 and the heat conductor 75 can be well maintained.

The LED module 100C is different from the LED module 100 only in that the frame 130 is changed to the frame 185.

As shown in FIG. 12, the first surface of the frame body 185 is a reference surface 186 to which the second side of the elastic member 50 on the other side in the axial direction is engaged, and one side in the axial direction from the reference surface 186 (the above). It has a frame-side engaging projection 187 protruding in a direction (direction close to the translucent cover 20).

The frame-side engaging protrusion 187 is arranged so as to follow the plan view annular shape of the elastic member 50, and the second side of the elastic member 50 on the other side in the axial direction is on the frame-side engaging protrusion 187. It is extrapolated.
Even in such a configuration, the engagement between the elastic member 50 and the frame body 185 can be well maintained.

The configuration of the third modification (that is, the heat conductor side engaging projection 79) is applied to the LED lamp 2A according to the first modification in which the heat conductor 65 is formed of a single member. Is also possible.

Embodiment 2
Hereinafter, other embodiments of the LED lamp according to the present invention will be described with reference to the accompanying drawings.
FIG. 14 is a partial vertical sectional view of the LED lamp 3 according to the present embodiment, and shows a vertical sectional view corresponding to FIG. 4 of the first embodiment.
In the figure, the same members as those in the present embodiment and the first to third modifications are designated by the same reference numerals.

The LED lamp 3 according to the present embodiment is different from the LED lamp 1 according to the present embodiment only in that the LED module 100 is changed to the LED module 200.

In the LED module 200, the plurality of bus bars 110 (the first to third bus bars 110 (1) to 110 (3)) and the insulating film 120 are a plurality of bus bars 210 (first to third bus bars 210 (1)). )-210 (3)) and the insulating layer 220 are different from the LED module 100 only in that they are changed.

That is, in the LED module 200, the plurality of bus bars arranged in the same plane with a gap 119 (the first and second gaps 119 (1) and 119 (2)) between the facing side surfaces. The bus bar connecting body is formed by connecting 210 to each other by the insulating layer 220.

15 (a) to 15 (c) show a plan view of the bus bar connection, a cross-sectional view taken along the line XV-XV in FIG. 15 (a), and a bottom view of the bus bar connection, respectively.

The insulating layer 220 is formed of an insulating resin coating film having heat resistance and insulating properties such as polyamide-imide, polyimide, polyamide, and epoxy, and is preferably formed by using Insuled (registered trademark).

As shown in FIGS. 15A to 15C2, the insulating layer 220 includes a gap filling portion 229 filled in a gap 119 between facing side surfaces of the plurality of bus bars, and the gap filling portion 229. It integrally has a first surface side laminated portion 221 that covers the first surface on one side in the thickness direction of the bus bar connecting body connected by the above.

The LED module 200 has first to third bus bars 210 (1) to 210 (3) as the plurality of bus bars 210, and the first and second gaps 119 (1) as the gap 119. It has 119 (2).

That is, the LED module 200 is arranged adjacent to the first bus bar 210 (1) via the first bus bar 210 (1) and the first gap 119 (1). And the third bus bar 110 (3) arranged adjacent to the second bus bar 210 (2) via the second gap 119 (2).

The insulating layer 220 serves as the gap filling portion 229, and the first and second gap filling portions 229 (1) and 229 (2) filled in the first and second gaps 119 (1) and 119 (2), respectively. )have.

As shown in FIGS. 15A and 15B, the first surface side laminated portion 221 has one of the first surfaces 211 of the first to third bus bars 210 (1) to 210 (3). The three first surface side openings 222 (1) to 222 (1) to form the first surface side connection portion 212 of each of the first to third bus bars 210 (1) to 210 (3) by exposing the predetermined area of 3) is provided.

In the present embodiment, as shown in FIGS. 15 (a) to 15 (c), the insulating layer 220 is a bus bar connecting body in addition to the gap filling portion and 229 and the first surface side laminated portion 221. The second surface side laminated portion 223 and the side surface side laminated portion 225 that cover the second surface 213 and the side surface 215 on the other side in the thickness direction are integrally provided.

The second surface side laminated portion 223 is exposed to a predetermined region of the second surface 213 on the other side of the first to third bus bars 210 (1) to 210 (3) in the thickness direction. One or more (three in the illustrated embodiment) second surface side openings 224 (1) to form the second surface side connection portions 214 of the first to third bus bars 210 (1) to 210 (3), respectively. 224 (3) is provided.

In the present embodiment, as shown in FIGS. 15 (b) and 15 (c), the second surface side of the second surface 213 of the first to third bus bars 210 (1) to 210 (3). The second surface side connecting portion 214 exposed to the outside through the openings 224 (1) to 224 (3) is located on the other side in the thickness direction (relative to the region where the second surface side laminated portion 223 is provided). It is located on the outer side), and the outer surface of the second surface side connecting portion 214 is positioned at the same position as the outer surface of the second surface side laminated portion 223 in the thickness direction.

According to such a configuration, it is possible to stabilize the installation posture when the LED module 200 is installed in the case main body 10, and the first to third bus bars 210 (1) to 210 (3) can be stabilized. It is possible to reliably make an electrical connection between the two-sided side connecting portion 214 and the first to third conductive members 40 (1) to 40 (3) corresponding to the first to third conductive members 40 (1) to 40 (3).

It is also possible to project the outer surface of the second surface side connecting portion 214 from the outer surface of the second surface side laminated portion 223 to the other side in the thickness direction, and the same effect can be obtained by such a configuration. be able to.

As a matter of course, it is also possible to apply the modified configuration of the first to third modifications of the first embodiment to the LED lamp 3 according to the present embodiment.

In the LED lamps according to the respective embodiments and the modifications, the LED module has three bus bars (the first to third bus bars), but of course, the LED module has two or more. It can also be modified to have four or more busbars.

Further, in the LED lamps according to the embodiments and the modifications, the outer peripheral surface of the frame is exposed in order to increase the heat conduction efficiency, but the LED element is transferred to the translucent cover. When the amount of heat to be transferred is sufficiently secured, it is also possible to cover the outer peripheral surface of the frame with an insulating layer formed by the insulating resin coating film.

10 Case body 18 Opening 20 Translucent cover 30 Slit group 32 (1) to (4) 1st to 4th slits 50 Elastic members 60, 65, 70, 75 Thermal conductors 62 (1) to (4) 1st -Fourth heat conduction member 72 Heat conductor side annular groove 79 Heat conductor side engagement protrusion 100 LED modules 110 (1) to (3) First to third bus bars 112 First surface side connection portion 119 (1), (2) ) 1st and 2nd gaps 120 Insulating films 122 (1) to (3) First surface side openings 130, 180, 185 Frame body 170 Encapsulating resin body 182 Frame body side engagement groove 187 Frame body side engaging protrusions 150 ( 1), (2) 1st and 2nd LED elements 151 1st electrode layer 152 2nd electrode layer 155 Element main body 160 (1), (2) 1st and 2nd electrical connection members 210 (1) to (3) 1st to 3rd bus bars 212 1st surface side connection part 220 Insulation layer 221 1st surface side laminated part 222 (1) to (3) 1st surface side opening

Claims (12)

The case body provided with an opening, a translucent cover connected to the case body so as to close the opening, and the case body so that light is radiated outward through the translucent cover. Equipped with multiple LED modules housed in
The LED module is formed of a conductive flat plate-shaped member, and is arranged in the same plane with a gap between facing side surfaces thereof, and the thickness direction of the plurality of bus bars so as to straddle the gap. An insulating resin film that is adhered to a first surface on one side to form a bus bar connecting body in which the plurality of bus bars are connected in a state where the gap is present, and is the first surface of each of the plurality of bus bars. An insulating resin film provided with one or more first-side openings that expose a predetermined area of the bus bar to form a first-side connection portion of each of the plurality of bus bars, and an element body and the element body. One or more LED elements having a first electrode layer and a second electrode layer disposed on one side and the other side in the thickness direction, wherein the second electrode layer is a part of the plurality of bus bars. The first electrode layer is mounted in a state of being electrically connected to the first side connection portion in the above, and the first electrode layer is attached to the first surface side connection portion in the remaining bus bar of the plurality of bus bars. An annular frame in a plan view formed by one or more LED elements electrically connected via the light-transmitting cover and a member having a higher thermal conductivity than the translucent cover, and the one or more LEDs in a plan view. It has a frame body fixed to the peripheral edge of the insulating resin film while surrounding the element.
Between the first surface on one side in the thickness direction of the frame and the inner surface of the translucent cover, there is an annular elastic member that surrounds the one or more LED elements in a plan view. An elastic member formed by a high thermal conductive member is inserted rather than the translucent cover.
At least a part of the inner surface of the translucent cover to which the first side of the elastic member on one side in the axial direction abuts is heat formed by the heat conductive member having a higher thermal conductivity than that of the translucent cover. An LED lamp characterized by being provided with a conductor. The case body provided with an opening, a translucent cover connected to the case body so as to close the opening, and the case body so that light is radiated outward through the translucent cover. Equipped with multiple LED modules housed in
The LED module is formed of a conductive flat plate-shaped member, and has a plurality of bus bars arranged in the same plane with a gap between facing side surfaces, a gap filling portion filled in the gap, and the gap. A plurality of insulating layers formed by an insulating resin coating film, integrally including a first surface-side laminated portion that covers a first surface on one side in the thickness direction of a bus bar coupling body connected by a filling portion. An insulating layer provided with one or more first surface side openings that expose a predetermined area of each first surface of the bus bar to form a first surface side connection portion of each of the plurality of bus bars. One or a plurality of LED elements having a first electrode layer and a second electrode layer disposed on one side and the other side in the thickness direction of the element body and the element body, respectively, and the second electrode layer is the plurality. The first electrode layer is mounted in a state of being electrically connected to the first surface side connection portion of a part of the bus bar, and the first electrode layer is the first surface side of the remaining bus bar of the plurality of bus bars. An annular frame in a plan view formed by one or a plurality of LED elements electrically connected to a connection portion via an electrical connection member and a member having a higher thermal conductivity than the translucent cover. It has a frame body fixed to the peripheral edge of the first surface side laminated portion in a state of surrounding the one or a plurality of LED elements.
Between the first surface on one side in the thickness direction of the frame and the inner surface of the translucent cover, there is an annular elastic member that surrounds the one or more LED elements in a plan view. An elastic member formed by a high thermal conductive member is inserted rather than the translucent cover.
At least a part of the inner surface of the translucent cover to which the first side of the elastic member on one side in the axial direction abuts is heat formed by the heat conductive member having a higher thermal conductivity than that of the translucent cover. An LED lamp characterized by being provided with a conductor. The insulating layer integrally has a second surface side laminated portion and a side surface side laminated portion that cover the second surface and the side surface on the other side in the thickness direction of the bus bar coupling, respectively.
In the second surface side laminated portion, a predetermined region of the second surface on the other side in the thickness direction of each of the plurality of bus bars is exposed to form a second surface side connection portion of each of the plurality of bus bars. The LED lamp according to claim 2, wherein one or more second side openings are provided. The LED lamp according to any one of claims 1 to 3, wherein the elastic member is a coil spring. The translucent cover has a plurality of slits provided for each of the plurality of LED modules.
Each of the plurality of slits is a plurality of slits penetrating between the outer surface and the inner surface of the translucent cover, and is arranged in series along the plan view annular shape of the elastic member in the corresponding LED module. And include a plurality of slits having a non-slit region between one adjacent slit and the other slit.
The LED lamp according to any one of claims 1 to 4, wherein the heat conductor has a plurality of heat conductive members fitted into the plurality of slits. The translucent cover has an annular groove on the inner surface along the annular shape in a plan view of the elastic member.
The LED lamp according to any one of claims 1 to 4, wherein the heat conductor is fitted in the annular groove. The heat conductor has a heat conductor side engaging groove on the inner surface along the annular shape of the elastic member in a plan view.
The LED lamp according to any one of claims 1 to 6, wherein the first side of the elastic member on one side in the axial direction is engaged with the heat conductor side engaging groove. The heat conductor has a heat conductor side engaging protrusion along the plan view annular shape of the elastic member on the inner surface.
The LED lamp according to any one of claims 1 to 6, wherein the first side of the elastic member on one side in the axial direction is extrapolated to the heat conductor side engaging protrusion. The frame body has a frame body side engaging groove along the plan view annular shape of the elastic member on the first surface.
The LED lamp according to any one of claims 1 to 8, wherein the second side of the elastic member on the other side in the axial direction is engaged in the frame side engaging groove. The frame body has a frame body side engaging protrusion along the plan view annular shape of the elastic member on the first surface.
The LED lamp according to any one of claims 1 to 8, wherein the second side of the elastic member on the other side in the axial direction is extrapolated to the frame-side engaging projection. The LED lamp according to any one of claims 1 to 10, wherein the second side of the elastic member on the other side in the axial direction is fixed to the first surface of the frame body. The LED module is characterized by having a translucent sealing resin body provided in a space defined by the frame body so as to surround the LED element and the electrical connection member. The LED lamp according to any one of 1 to 11.

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