JP6735511B2 - Lighting fixtures and leaf springs - Google Patents

Description

The present invention relates to a lighting fixture that is attached to a building material by using a leaf spring, and a leaf spring used for the lighting fixture.

2. Description of the Related Art Conventionally, as a lighting fixture, for example, a ceiling-embedded lighting fixture, which is embedded in a construction material such as a ceiling plate like a downlight and irradiates light vertically downward, is known.

This type of lighting fixture includes a light source, a fixture body that houses the light source, and a plurality of leaf springs attached to the outer wall of the fixture body (see, for example, Patent Document 1). For example, a ceiling-embedded luminaire is fixed to an opening provided in a ceiling plate by using a reaction force generated by a plurality of leaf springs pressing the ceiling plate. The reaction force here is a force applied to the lighting fixture in a direction opposite to the direction of the force applied in the direction of removing the lighting fixture from the ceiling plate.

In the luminaire disclosed in Patent Document 1, a plurality of pressing portions are provided on each of the plurality of leaf springs, so that a sufficient reaction force is obtained even on a ceiling having a different board thickness.

JP, 2009-218007, A

In the lighting device disclosed in Patent Document 1, a sufficient reaction force can be obtained by the leaf spring. However, in the luminaire disclosed in Patent Document 1, an excessive force is applied to the ceiling plate by the leaf spring when the luminaire fixed to the opening in the ceiling is removed. Therefore, the ceiling plate may be damaged.

Therefore, the present invention is a lighting fixture that is attached to a building material by using a leaf spring, and a sufficient pressing force can be applied to the building material with different plate thickness, and an excessive force is applied to the building material when detached. It is an object of the present invention to provide a lighting fixture capable of suppressing such a situation and a leaf spring used for the lighting fixture.

In order to achieve the above object, one mode of a lighting fixture according to the present invention comprises a light source, a fixture main body that houses the light source, and a plurality of leaf springs attached to an outer wall of the fixture main body. Each of the leaf springs has a locked portion to be locked to the outer wall, a curved portion having an involute curved side surface shape, and a folded portion connecting the locked portion and the curved portion. ..

Further, in order to achieve the above object, one aspect of the leaf spring according to the present invention is a leaf spring for attaching an instrument to an opening formed in a building material, which is engaged with the instrument. A stop portion, a curved portion having a side surface shape of an involute curved shape, and a folded portion connecting the locked portion and the curved portion.

According to one aspect of the present invention, there is provided a lighting fixture embedded in a construction material, in which sufficient pressing force is applied to construction materials having different plate thicknesses, and an excessive force is applied to the construction material at the time of removal. It is possible to provide a lighting fixture that can suppress the addition of heat and a leaf spring used for the lighting fixture.

FIG. 1 is an external perspective view showing the external appearance of the bottom surface side of the lighting device according to the embodiment. FIG. 2 is a cross-sectional view of the lighting fixture according to the embodiment. FIG. 3 is a side view showing the detailed configuration of the leaf spring according to the embodiment. FIG. 4 is a side view showing the configuration of the folded portion of the leaf spring according to the embodiment. FIG. 5 is a partial cross-sectional view in a state in which the lighting fixture according to the embodiment is installed on a building material. FIG. 6 is a partial cross-sectional view showing the state of the leaf spring 8 during the removal of the lighting fixture according to the embodiment from the building material. FIG. 7 is a graph showing an example of the reaction force generated by the leaf spring when the lighting fixture according to the embodiment is removed from the building material. FIG. 8 is a side view showing the configuration of the leaf spring according to the comparative example. FIG. 9 is a graph showing an example of a reaction force generated by the leaf spring when the leaf spring according to the comparative example is removed from the building material. FIG. 10 is a side view showing the configuration of the leaf spring according to the first modification of the embodiment. FIG. 11 is a graph showing an example of the reaction force generated by the leaf spring when the lighting fixture including the leaf spring according to the first modification of the embodiment is removed from the building material. FIG. 12 is a side view showing the configuration of the leaf spring according to the second modification of the embodiment. FIG. 13 is a graph showing an example of a reaction force generated by the leaf spring when the lighting fixture including the leaf spring according to the second modification of the embodiment is removed from the building material. FIG. 14 is a side view showing the configuration of the leaf spring according to Modification 3 of the embodiment. FIG. 15 is a graph showing an example of a reaction force generated by the leaf spring when the lighting fixture including the leaf spring according to the modified example 3 of the embodiment is removed from the building material. FIG. 16 is a side view showing the configuration of the leaf spring according to Modification 4 of the embodiment. FIG. 17 is a graph showing an example of a reaction force generated by the leaf spring when the lighting fixture including the leaf spring according to the modified example 4 of the embodiment is removed from the building material.

Embodiments of the present invention will be described below with reference to the drawings. Each of the embodiments described below shows one specific example of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, arrangement positions of constituent elements, connection forms, and the like shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, the constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as arbitrary constituent elements.

It should be noted that each drawing is a schematic view and is not necessarily strictly illustrated. Further, in each drawing, substantially the same configurations are denoted by the same reference numerals, and overlapping description will be omitted or simplified.

(Embodiment)
[1. overall structure]
First, the overall configuration of the lighting fixture 1 according to the embodiment will be described with reference to the drawings.

FIG. 1 is an external perspective view showing the external appearance of the bottom surface side of the lighting fixture 1 according to the present embodiment. FIG. 2 is a cross-sectional view of the lighting fixture 1 according to this embodiment. FIG. 2 shows a cross section passing through the optical axis J of the lighting fixture 1. In addition, FIG. 2 also shows a building material 100 to which the lighting fixture 1 is attached.

In each drawing, a direction parallel to the optical axis J is a Y-axis direction, and two directions perpendicular to the optical axis J and orthogonal to each other are a Z-axis direction and an X-axis direction. In the present embodiment, the Y-axis direction is the vertical direction. FIG. 2 shows a cross section parallel to the XY plane and passing through the optical axis J.

The luminaire 1 shown in FIGS. 1 and 2 is an embedded luminaire such as a downlight that illuminates light downward (floor, wall, etc.) by being embedded in a building material such as a ceiling plate of a building. is there.

As shown in FIGS. 1 and 2, the lighting fixture 1 includes a fixture body 10 and a plurality of leaf springs 8 attached to an outer wall 15 of the fixture body 10. Further, as shown in FIG. 2, the lighting fixture 1 further includes a light source 30, which is housed in the fixture body 10, a reflecting member 40, and an optical member 50. Hereinafter, each component of the lighting fixture 1 will be described.

[1-1. Instrument body]
As shown in FIG. 2, the instrument body 10 is a bottomed tubular member that houses the light source 30. The instrument body 10 accommodates the light source 30 inside the recess 16. In the present embodiment, the instrument body 10 includes a light source mounting base 18 and a frame 11.

The light source mounting base 18 is a mounting base to which the light source 30 is mounted, and forms the bottom of the bottomed tubular instrument body 10. The light source mount 18 also functions as a heat sink that dissipates the heat emitted from the light source 30. Therefore, the light source mount 18 is preferably made of a material having a high thermal conductivity such as a metal material. The light source mount 18 is made of aluminum die casting made of, for example, aluminum.

The light source 30 is arranged on the lower surface of the light source mount 18 in FIG. The light source mount 18 has a plurality of fins 19 for heat dissipation on the upper side in FIG. Thereby, the heat emitted from the light source 30 is efficiently transmitted to the plurality of fins 19.

The frame 11 shown in FIGS. 1 and 2 is a tubular member arranged on the opening 17 side of the recess 16 of the instrument body 10. The frame body 11 can be formed of, for example, a metal material such as aluminum.

In the present embodiment, as shown in FIG. 2, the frame body 11 includes a shade portion 14, a collar portion 13, an outer side wall 15, and a plurality of locking portions 12.

The shade portion 14 is a portion that reflects a part of the light emitted from the light source 30. The shade portion 14 has a cylindrical shape whose inner diameter gradually increases toward the end on the negative side in the Y-axis direction.

The collar portion 13 is an annular portion that holds the building material 100 such as a ceiling plate to which the lighting fixture 1 is attached. As described above, the flange 13 and the plurality of leaf springs 8 sandwich the construction material 100 such as the ceiling plate. Thereby, the lighting fixture 1 can be stably fixed to the construction material 100.

The outer side wall 15 is a wall-shaped member that forms the outer side surface of the frame body 11. In the present embodiment, the outer wall 15 has a cylindrical shape. The outer diameter of the outer wall 15 is smaller than the outer diameter of the collar portion 13. An opening having a diameter larger than the outer diameter of the outer wall 15 and smaller than the outer diameter of the flange 13 is provided in the construction material 100 to which the lighting fixture 1 is attached. When the lighting fixture 1 is attached to the construction material 100, the fixture body 10 is inserted into the opening.

The plurality of locking portions 12 are members that lock the plurality of leaf springs 8. One leaf spring 8 is locked to each of the plurality of locking portions 12. In the present embodiment, the instrument body 10 has two locking portions 12. An insertion hole for inserting the leaf spring 8 is formed in each of the two locking portions 12, and an end portion (a locked portion 81 described later) of the leaf spring 8 is inserted into the insertion hole. As a result, the leaf spring 8 is locked by the locking portion 12.

[1-2. Leaf spring]
The plurality of leaf springs 8 are elastic members for attaching the lighting fixture 1 to the openings formed in the building material 100, and are attached to the outer wall 15 of the fixture body 10. The construction material 100 is sandwiched between the plurality of leaf springs 8 and the flange portion 13 of the instrument body 10.

In the present embodiment, the lighting fixture 1 includes two leaf springs 8. The lighting fixture 1 may include three or more leaf springs 8. Each of the two leaf springs 8 is locked by the locking portion 12 on the outer side wall 15 of the instrument body 10. In the present embodiment, the two leaf springs 8 are plate-shaped members each having a substantially constant width (width in the Z-axis direction in FIG. 2). The leaf spring 8 is formed of a metal material such as steel. The detailed configuration of the leaf spring 8 will be described later.

[1-3. light source]
The light source 30 shown in FIG. 2 is a light emitting module and is a light source that radially emits predetermined light. In the present embodiment, the light source 30 is a light emitting module having an LED. The light source 30 is configured to emit white light, for example. The light source 30 is composed of COB (Chip On Board) type LEDs, and a base, a plurality of blue LEDs which are bare chips (LED chips) mounted on the base, and the blue LEDs are sealed to emit yellow fluorescent light. And a sealing member including a body.

The base used for the light source 30 is a mounting substrate for mounting a plurality of LEDs, and is, for example, a ceramic substrate, a resin substrate, or an insulating-coated metal base substrate. The base is, for example, a plate member having a flat surface that is rectangular in plan view. The base is fixed with its bottom surface (the surface on the Y axis direction positive side) facing the light source mounting base 18 of the instrument body 10. In addition, a pair of electrode terminals (a positive electrode terminal and a negative electrode terminal) for receiving DC power for causing the LED to emit light from the outside are formed on the base (not shown).

The light source 30 configured as above is housed in the recess 16 of the instrument body 10. In the present embodiment, the light source 30 is fixed to the lower side of the light source mounting base 18 of the instrument body 10 in FIG.

[1-4. Reflective member]
The reflecting member 40 shown in FIG. 2 is a member that controls the distribution of light from the light source 30. In the present embodiment, the reflection member 40 reflects the light from the light source 30 toward the optical member 50.

As shown in FIG. 2, the reflecting member 40 has an inner diameter gradually increasing from the end on the side where the light from the light source 30 is incident (the positive side in the Y-axis direction) toward the end on the side where the light is emitted. It has a cylindrical shape that is configured to be large. The light from the light source 30 is reflected on the inner surface of the reflecting member 40.

The reflecting member 40 can be formed using a hard white resin material such as polybutylene terephthalate (PBT). The reflective member 40 may be provided with a metal film such as aluminum on its inner surface.

[1-5. Optical member]
The optical member 50 shown in FIG. 2 is a translucent member on which the light from the reflecting member 40 is incident. The optical member 50 may have a function of controlling the light distribution of the light incident from the reflecting member 40 and emitting the light. In the present embodiment, the optical member 50 is a disk-shaped Fresnel lens. The optical member 50 collects the light from the reflecting member 40 and emits the light having a substantially circular cross section.

The optical member 50 is formed of a translucent material, and can be formed of a transparent resin material such as acrylic and polycarbonate (PC), or a transparent material such as a glass material.

[2. Detailed configuration of leaf spring]
The detailed configuration of the leaf spring 8 according to the present embodiment will be described with reference to the drawings.

FIG. 3 is a side view showing the detailed configuration of the leaf spring 8 according to the present embodiment. FIG. 4 is a side view showing the configuration of the folded portion 80 of the leaf spring 8 according to this embodiment. In FIG. 4, the inside of the broken line frame IV shown in FIG. 3 is shown enlarged.

As shown in FIGS. 3 and 4, the leaf spring 8 includes a locked portion 81 that is locked to the outer wall 15 of the instrument body 10, a curved portion 85 having a side surface shape of an involute curve, and a locked portion. It has a folded portion 80 that connects the stopper portion 81 and the curved portion 85. In the present embodiment, the leaf spring 8 further has a bent portion 86 at the end portion on the side far from the instrument body 10. The plate thickness and width of the leaf spring 8 (width in the direction perpendicular to the paper surface of FIGS. 3 and 4) depend on the Young's modulus of the material forming the leaf spring 8, the weight of the luminaire 1, and the like. It is appropriately determined so that it can be stably fixed to the construction material 100. For example, if the Young's modulus of the leaf spring 8 is about 180 [GPa] or more and 220 [GPa] or less, the leaf spring 8 has a thickness of about 1 mm and the leaf spring 8 has a width of about 20 mm.

The locked portion 81 is a portion that fixes the leaf spring 8 to the instrument body 10, and is locked to the locking portion 12 of the outer wall 15. In the present embodiment, the side surface shape of the locked portion 81 is linear.

The folded portion 80 is a portion that connects the locked portion 81 and the curved portion 85 and has a shape that is folded back about 180 degrees. The shape of the folded-back portion 80 is not particularly limited as long as it is a folded shape of about 180 degrees. In the present embodiment, the folded-back portion 80 connects the first arc portion 82 and the second arc portion 83 having the arc-shaped side surface shape, the second arc portion 83 and the curved portion 85, and has a linear side surface shape. And the connecting portion 84. In the example shown in FIG. 4, the central angle θ1 of the first arc portion 82 is 220 degrees and the central angle θ2 of the second arc portion 83 is 55 degrees.

The involute curve showing the side surface shape of the curved portion 85 is expressed by the following Expression 1 with the angle θ as a parameter.

In the present embodiment, the constant A in the above formula 1 is 6 or more and 12 or less, and the constant B is 8 or more and 16 or less.

Further, more specifically, the side surface shape of the curved portion 85 has a shape of a portion of the involute curve where the angle θ is in the range of the starting end angle θa or more and the ending angle θb or less. In the present embodiment, the starting angle θa is 0 degrees or more and 30 degrees or less. The terminal angle θb is determined so that the curved portion 85 does not interfere with the building material 100. Note that, as shown in FIG. 2 and the like, the curved portion 85 is arranged so as to be convex in a direction away from the construction material 100. That is, in FIG. 2 and the like, they are arranged so as to be convex upward. Further, the end portion of the curved portion 85 near the folded portion 80 is the position corresponding to the starting end angle θa of the involute curve.

The bent portion 86 is a portion for suppressing the edge of the end portion of the leaf spring 8 in the longitudinal direction from damaging the building material 100. In a state where the lighting fixture 1 is properly attached to the building material 100, in order to prevent the pressing force of the leaf spring 8 in the opening of the building material 100 from being reduced, the leaf spring 8 has a longitudinal end portion. Are designed not to press the construction material 100. However, when the lighting fixture 1 is attached to the construction material 100 and when it is detached from the construction material 100, the lighting equipment 1 may be tilted and the end portion of the leaf spring 8 in the longitudinal direction may press the upper surface of the construction material 100. is there. Even in such a case, since the leaf spring 8 is provided with the bent portion 86, the leaf spring 8 is not at the edge of the end portion in the longitudinal direction but at the curved surface of the bent portion 86. Touch. Therefore, it is possible to prevent the edge of the end portion of the leaf spring 8 in the longitudinal direction from damaging the construction material 100.

Next, the action and effect of the leaf spring 8 according to this embodiment will be described with reference to the drawings.

FIG. 5 is a partial cross-sectional view of the lighting fixture 1 according to the present embodiment installed in the building material 100. FIG. 6 is a partial cross-sectional view showing the state of the leaf spring 8 during the removal of the lighting fixture 1 according to the present embodiment from the building material 100.

When the luminaire 1 is installed on the building material 100, as shown in FIG. 5, the curved portion 85 of the leaf spring 8 contacts the upper end of the opening in the building material 100 in FIG. 8 shapes are set. Specifically, the shapes and dimensions of the first arc portion 82, the second arc portion 83, and the connecting portion 84 of the folded portion 80 are set according to the thickness of the building material 100. Accordingly, when the lighting fixture 1 is installed on the building material 100, it is possible to generate a reaction force mainly defined by the shape of the curved portion 85.

Also, when the lighting fixture 1 is removed from the building material 100, as shown in FIG. 6, the curved portion 85 of the leaf spring 8 contacts the upper end of the opening in the building material 100 in FIG. 6. Therefore, when the lighting fixture 1 is removed from the building material 100, the reaction force generated by the leaf spring 8 is mainly defined by the shape of the curved portion 85. In the leaf spring 8 according to the present embodiment, since the curved portion 85 has the involute curved side surface shape, it is possible to prevent the reaction force generated by the leaf spring 8 from becoming excessive. Here, an example of the reaction force generated by the leaf spring 8 according to the present embodiment will be shown.

FIG. 7 is a graph showing an example of a reaction force generated by one leaf spring 8 when the lighting fixture 1 according to the present embodiment is removed from the building material 100. The reaction force shown in FIG. 7 is a value obtained by simulation based on the shapes of the leaf spring 8 and the building material 100. Further, since the lighting fixture 1 according to the present embodiment includes the two leaf springs 8, the reaction force applied to the entire lighting fixture 1 is twice the reaction force shown in FIG. 7. In the present embodiment, the involute curve showing the side surface shape of the curved portion 85 of the leaf spring 8 is expressed by the above expression 1, the constant A and the constant B of the above expression 1 are 12, the starting end angle θa is 0 degree, and the construction The material 100 has a thickness of 10 mm. FIG. 7 shows the relationship between the stroke (length St shown in FIG. 6) which is the length of the lighting fixture 1 pulled out from the installed state and the reaction force.

Here, the effect of the leaf spring 8 according to the present embodiment will be described in comparison with a comparative example.

FIG. 8 is a side view showing the configuration of the leaf spring 800 according to the comparative example. The leaf spring 800 shown in FIG. 8 has the same shape as the leaf spring disclosed in Patent Document 1 above.

FIG. 9 is a graph showing an example of a reaction force generated by the leaf spring 800 when the leaf spring 800 according to the comparative example is removed from the building material 100. FIG. 9 shows the value of the reaction force generated when the leaf spring 800 according to the comparative example is used instead of the leaf spring 8 in the lighting device 1 according to the present embodiment. Similar to FIG. 7, FIG. 9 shows the relationship between the stroke, which is the length of the lighting fixture pulled out from the installed state, and the reaction force.

As shown in FIG. 8, the leaf spring 800 according to the comparative example includes a locked portion 801, a folded portion 810, and a curved portion 850, like the leaf spring 8 according to the present embodiment. On the other hand, the leaf spring 800 according to the comparative example has, in the curved portion 850, two pressing portions 851 and 852 each having a curved side surface shape. Thereby, the leaf spring 800 according to the comparative example can apply a sufficient pressing force to the building materials 100 having different sheet thicknesses. However, when the leaf spring 800 according to the comparative example is used, an excessive reaction force is applied to the construction material 100 when the lighting fixture is removed, as shown in FIG. 9. For example, in the example shown in FIG. 9, when the stroke is about 11 mm, the reaction force sharply increases and a reaction force of 100 N or more is applied to the construction material 100.

On the other hand, when the leaf spring 8 according to the present embodiment is used, as shown in FIG. 7, a sufficient reaction force can be obtained over the entire range of the stroke 0 to 15 mm, and the reaction force applied when the lighting fixture 1 is removed is obtained. The force is suppressed to less than 40N at the maximum without increasing sharply. As described above, the leaf spring 8 according to the present embodiment can apply a sufficient pressing force to the construction materials 100 having different plate thicknesses, and can suppress the application of excessive force to the construction materials 100 at the time of removal. .. Therefore, the lighting fixture 1 according to the present embodiment is stably fixed to the construction material 100 having different plate thicknesses by the plate spring 8. Moreover, when removing the lighting fixture 1 from the construction material 100, it can suppress that the construction material 100 is damaged.

[3. Modification]
Although an example of the leaf spring 8 according to the present embodiment has been described above, the configuration of the leaf spring 8 is not limited to the above configuration. Hereinafter, leaf springs according to Modifications 1 to 4 of the present embodiment will be described with reference to the drawings.

10, FIG. 12, FIG. 14 and FIG. 16 are side views showing the configurations of the leaf springs 108, 208, 308 and 408 according to Modifications 1 to 4 of the present embodiment, respectively.

11, FIG. 13, FIG. 15 and FIG. 17 are leaf springs when removing the lighting fixture including the leaf springs 108, 208, 308 and 408 according to the modified examples 1 to 4 of the present embodiment from the construction material 100, respectively. It is a graph which shows an example of the reaction force generated by.

Also in the leaf spring 108 according to the first modification shown in FIG. 10, the involute curve showing the side surface shape of the curved portion 185 is represented by the above-described formula 1 similarly to the leaf spring 8 according to the present embodiment. However, in the modified example 1, the constant A and the constant B in the above formula 1 are 6, and the starting end angle θa of the angle θ is 0 degrees. That is, the leaf spring 108 according to the first modification differs from the leaf spring 8 according to the present embodiment in the value of the constant A, and matches in other parameters. Even when such a leaf spring 108 is used, as shown in FIG. 11, a sufficient reaction force can be obtained over the entire stroke range of 0 to 15 mm, and the reaction force applied when removing the lighting fixture 1 is steep. It is suppressed to less than 40N at the maximum without increasing.

Also in the leaf spring 208 according to the second modification shown in FIG. 12, the involute curve showing the side surface shape of the curved portion 285 is expressed by the above formula 1 similarly to the leaf spring 8 according to the present embodiment. However, in the modified example 2, the constant A in the above equation 1 is 12, the constant B is 16, and the starting end angle θa of the angle θ is 0 degrees. That is, the leaf spring 208 according to the second modification differs from the leaf spring 8 according to the present embodiment in the value of the constant B, and matches in other parameters. Even when such a leaf spring 208 is used, as shown in FIG. 13, a sufficient reaction force can be obtained over the entire stroke range of 0 to 15 mm, and the reaction force applied when removing the lighting fixture 1 is steep. It is suppressed to less than 40N at the maximum without increasing.

Also in the leaf spring 308 according to the modified example 3 shown in FIG. 14, the involute curve showing the side surface shape of the curved portion 385 is expressed by the above formula 1 similarly to the leaf spring 8 according to the present embodiment. However, in the modified example 3, the constant A and the constant B in the above formula 1 are 12 and the starting angle θa of the angle θ is 30 degrees. That is, the leaf spring 308 according to Modification 3 is different from the leaf spring 8 according to the present embodiment in the value of the starting end angle θa and is the same in other parameters. Even when such a leaf spring 308 is used, as shown in FIG. 15, a sufficient reaction force can be obtained over the entire stroke range of 0 to 15 mm, and the reaction force applied when removing the lighting fixture 1 is steep. It is suppressed to less than 40N at the maximum without increasing.

Also in the leaf spring 408 according to the modified example 4 shown in FIG. 16, the involute curve showing the side surface shape of the curved portion 485 is expressed by the above formula 1 similarly to the leaf spring 8 according to the present embodiment. However, in the modified example 4, the constant A and the constant B in the above formula 1 are 12 and the start angle θa of the angle θ is 0 degree. That is, the leaf spring 408 according to Modification 4 is different from the leaf spring 8 according to the present embodiment in the value of the constant B, and is the same in other parameters. Even when such a leaf spring 408 is used, as shown in FIG. 17, a sufficient reaction force can be obtained over the entire stroke range of 0 to 15 mm, and the reaction force applied when the lighting fixture 1 is removed is steep. It is suppressed to about 40N at the maximum without increasing.

As described above, the involute curve showing the side surface shape of the curved portion 85 of the leaf spring 8 according to the present embodiment is represented by the above formula 1, and the constant A is 6 or more and 12 or less and the constant B is 8 or more. , 16 or less. Further, the starting angle θa of the angle θ in the above formula 1 may be 0 degrees or more and 30 degrees or less. If the constant A, the constant B, and the starting angle θa are within the above ranges, respectively, when the lighting fixture 1 is removed from the construction material 100, a sufficient reaction force can be obtained over the entire stroke and the lighting fixture 1 is removed. It is possible to suppress an excessive reaction force from being applied to the construction material.

[4. Summary]
As described above, the lighting fixture 1 according to the present embodiment includes the light source 30, the fixture body 10 that houses the light source 30, and the plurality of leaf springs 8 attached to the outer wall 15 of the fixture body 10. Each of the plurality of leaf springs 8 includes a locked portion 81 that is locked to the outer wall 15, a curved portion 85 having a side surface shape of an involute curve, and a folded portion that connects the locked portion 81 and the curved portion 85. And a section 80.

Thus, when the lighting fixture 1 is removed from the construction material 100, a sufficient reaction force can be obtained by the leaf spring 8 of the lighting fixture 1 over the entire stroke, and when the lighting fixture 1 is removed, an excessive amount of force is applied to the construction material 100. It is possible to suppress application of reaction force. Therefore, the lighting fixture 1 according to the present embodiment is stably fixed to the construction material 100 having different plate thicknesses by the plate spring 8. Moreover, when removing the lighting fixture 1 from the construction material 100, it can suppress that the construction material 100 is damaged.

Further, in the lighting equipment 1, the involute curve showing the side surface shape of the curved portion 85 is represented by the above equation 1 with the angle θ as a parameter, and the constant A in the above equation 1 is 6 or more and 12 or less, and The constant B may be 8 or more and 16 or less.

This makes it possible to more reliably suppress the reaction force applied to the construction material 100 when the lighting fixture 1 attached to the construction material 100 having a plate thickness of about 10 mm is removed.

Further, in the lighting fixture 1, the starting angle of the angle θ in the above expression 1 may be 0° or more and 30° or less.

This makes it possible to more reliably suppress the reaction force applied to the construction material 100 when the lighting fixture 1 attached to the construction material 100 having a plate thickness of about 10 mm is removed.

Further, the leaf spring 8 according to the present embodiment is an elastic member for attaching the lighting fixture 1 to the opening formed in the building material 100. The leaf spring 8 includes a locked portion 81 that is locked to the lighting device 1, a curved portion 85 having a side surface shape of an involute curve, and a folded portion 80 that connects the locked portion 81 and the curved portion 85. Have.

Since the lighting fixture 1 includes such a leaf spring 8, a sufficient reaction force can be obtained over the entire stroke when the lighting fixture 1 is removed from the construction material 100, and the construction material can be obtained when the lighting fixture 1 is removed. It is possible to suppress an excessive reaction force from being applied to 100. As described above, the leaf spring 8 according to the present embodiment can apply a sufficient pressing force to the building materials 100 having different plate thicknesses, and can suppress an excessive force from being applied to the building materials at the time of removal. Therefore, the leaf spring 8 according to the present embodiment can stably fix the lighting fixture 1 to the construction material 100 having different plate thicknesses. Further, according to the leaf spring 8 according to the present embodiment, it is possible to suppress damage to the building material 100 when the lighting fixture 1 is removed from the building material 100.

(Other variants etc.)
Although the luminaire according to the present invention has been described above based on the embodiment, the present invention is not limited to the above embodiment.

For example, the involute curve showing the side surface shape of the curved portion of each leaf spring according to the above-described embodiment and each modification is represented by the above-mentioned formula 1, the constant A is 6 or more and 12 or less, and the constant B is 8 As described above, the value is 16 or less, but the values of the constant A and the constant B are not limited to this. For example, the values of the constant A and the constant B may be set so that the same effects as those of the above-described embodiment and each modification can be obtained. Similarly, the starting angle θa of the angle θ in the above expression 1 may be larger than 30 degrees.

Further, in each of the leaf springs according to the above-described embodiment and each modification, the side surface shape of the folded-back portion 80 is configured by a combination of arc-shaped shapes and the like, but the configuration of the folded-back portion 80 is not limited to this. Not done. The folded-back portion 80 may have a structure in which the locked portion 81 and the curved portion 85 are connected to each other and folded back by about 180 degrees.

Further, in each of the leaf springs according to the above-described embodiment and each modification, the side surface shape of the locked portion 81 is linear, but the side surface shape of the locked portion 81 is not limited to this. .. The locked portion 81 may have any shape that is locked by the locking portion 12. For example, the side surface shape of the locked portion 81 may be curved.

Further, although the plurality of locking portions 12 according to the above-described embodiment and each modification have the insertion holes, the configuration of the locking portions 12 is not limited to this. The locking portion 12 may have any configuration capable of locking the locked portion 81. For example, the locking portion 12 may have a groove shape capable of locking the locked portion 81.

Further, in the above embodiment, the light source 30 is configured to emit white light by the blue LED chip and the yellow phosphor, but the light source 30 is not limited to this. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used, and the resin may be combined with a blue LED chip to emit white light.

Further, in the above embodiment, the blue LED chip is used as the LED, but the LED is not limited to this. For example, an LED chip that emits a color other than blue may be used as the LED. In this case, the phosphor may be appropriately selected according to the emission wavelength of the LED.

Further, in the above embodiment, the light source 30 (LED light source) has the COB structure in which the LED chip is directly mounted on the base, but the present invention is not limited to this. For example, an LED module having an SMD (Surface Mount Device) structure may be used instead of the COB structure LED module. The LED module of the SMD structure is a package type LED element in which an LED chip (light emitting element) is mounted in a recess of a resin package (container) and a sealing member (phosphor-containing resin) is enclosed in the recess. This is a configuration in which one or a plurality of (SMD type LED elements) are mounted on the substrate.

Further, in each of the above embodiments, the LED is exemplified as the light emitting element, but as the light emitting element, a semiconductor light emitting element such as a semiconductor laser, or other solid state light emitting such as an organic EL (Electro Luminescence) element or an inorganic EL is used. Elements may be used.

Moreover, the lighting fixture 1 in the above-mentioned embodiment may be installed in a building material other than the ceiling.

Further, the applications of the leaf springs according to the above-described embodiment and its modifications are not limited to lighting fixtures. The leaf spring can also be applied to an arbitrary device embedded in a building material such as a speaker.

In addition, it can be realized by making various modifications to those embodiments by those skilled in the art, or by arbitrarily combining the components and functions of the embodiments without departing from the spirit of the present invention. The form is also included in the present invention.

1 Lighting Fixture 8, 108, 208, 308, 408 Leaf Spring 10 Fixture Main Body 15 Outer Side Wall 30 Light Source 80 Folding Part 81 Locked Part 85, 185, 285, 385, 485 Curved Part

Claims (4)

A lighting fixture attached to an opening formed in a construction material,
A light source,
An instrument main body that houses the light source,
A plurality of leaf springs attached to the outer wall of the instrument body,
Each of the plurality of leaf springs,
A locked portion that is locked to the outer wall,
A curved portion having an involute curved side surface shape,
A folded portion connecting the locked portion and the curved portion ,
The plate and the locked portion of the spring provided at the opposite end, have a said plate bent portion which distal end of the end side of the spring are bent on the convex side of the curved portion,
The said leaf spring is a lighting fixture which presses the said construction material on the concave side of the said curved part, and does not press the said construction material on the convex side of the said curved part . The involute curve showing the side surface shape of the curved portion has the following equation with the angle θ as a parameter.

The lighting device according to claim 1, wherein the constant A in the formula is 6 or more and 12 or less, and the constant B is 8 or more and 16 or less. The lighting fixture according to claim 2, wherein a starting angle of the angle θ in the expression is 0° or more and 30° or less. A leaf spring for attaching an instrument to an opening formed in a construction material,
A locked portion that is locked to the device,
A curved portion having an involute curved side surface shape,
A folded portion connecting the locked portion and the curved portion ,
The plate and the locked portion of the spring provided at the opposite end, have a said plate bent portion which distal end of the end side of the spring are bent on the convex side of the curved portion,
The leaf spring is a leaf spring that presses the building material on the concave side of the curved portion and does not press the building material on the convex side of the curved portion .

Images