TW202014636A - Lighting device - Google Patents

Abstract

An object of the invention is to provide a lighting device in which an optical member can be secured in a stable manner. The lighting device comprises a light source unit 40 having a semiconductor light-emitting element 42, an optical member 70 for diffusing or condensing the light emitted from the light source unit 40, a base member to which the optical member 70 is secured, and a securing member 112 which engages with a portion 100 of the base member to secure the optical member 70 to the base member, wherein the portion 100 of the base member is formed from a metal having a higher shear stress than aluminum.

Description

Lighting device

The present disclosure relates to a lighting device.

Since the past, people have used lighting devices that use semiconductor light-emitting elements as light sources as an alternative to incandescent or fluorescent lamps. Generally speaking, such a lighting device has an optical member such as a light guide plate because it diffuses the light emitted from the semiconductor light emitting element. Furthermore, the optical member is fixed to the base member of the lighting device by a fixing member such as a screw. [Prior Technical Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2014-146562

[Problem to be solved by invention]

In recent years, in the field of ceiling lamps as an example of a lighting device, as the lighting device has become multifunctional, high-performance, etc., optical components have gradually become larger. When the optical member is enlarged, the optical member becomes heavy. In this way, we need a structure that can fix even the heavier optical member when the optical member is fixed to the base member by the fixing member.

In view of the above-mentioned problems, the present invention aims to provide a lighting device that can stably fix a heavier optical member to a base member. [Means to solve the problem]

The lighting device according to the disclosed invention includes: a light source unit having a semiconductor light emitting element; an optical member to diffuse or condense light emitted from the light source unit; a base member for fixing the optical member; and a fixing member by and A part of the base member is engaged to fix the optical member to the base member; wherein a part of the base member is composed of a metal whose shear stress is higher than aluminum. [Effect of invention]

According to the lighting device of the disclosed invention, the part of the base member that engages with the fixing member is composed of a metal whose shear stress is higher than that of aluminum. Therefore, even if the optical member is heavy, it can be stably fixed to the base member.

The following describes the lighting device according to one aspect of the present disclosure with reference to the drawings. In addition, the scale of the components in each drawing is different from the actual size.

(Overall composition) FIG. 1 is a perspective view of a lighting device according to one aspect of the present disclosure. As shown in FIG. 1, a lighting device 1 according to one aspect of the disclosed invention is a so-called ceiling lamp used for installation on a ceiling. The lighting device 1 is attached to the ceiling junction box (illustration omitted) of the ceiling by an adapter (illustration omitted) in an detachable manner. In the following description, when the lighting device 1 installed in the ceiling is viewed from the bottom side, the observable side is the front side of the lighting device 1, and the unobservable side is the back side of the lighting device 1 side.

2 is an exploded perspective view of a lighting device according to an aspect of the present disclosure. As shown in FIG. 2, the lighting device 1 includes a buffer material 10, a housing 20, a base member body 30, a light source unit 40, a lens 50, a decorative cover 60, a light guide plate 70, an installation plate 80, a cover 90, and reinforcing accessories 100. In addition, the base member 2 is constituted by the base member body 30 and the reinforcement fitting 100.

(Buffer material) The cushioning material 10 is a member for filling the gap between the ceiling and the housing 20. In a state where the lighting device 1 has been installed on the ceiling, the back side of the cushioning material 10 abuts the ceiling, and the front side abuts the housing 20.

(case) The case 20 is a member for covering and shielding a part of the back side of the base member body 30 and the reinforcement fitting 100. The case 20 is in a state where the central portion of the base member body 30 is covered from the back side, and the base member body 30 is screwed and fixed by screws (not shown).

(Base member body) FIG. 3 is a plan view when the base member body 30 is viewed from the back side. The light source unit 40 is fixed to the base member body 30 as described later, and the reinforcing fitting 100, the light guide plate 70 and the lens 50 are further fixed to the base member body 30. In addition, an expansion protrusion 34 that swells into a dome shape is formed in the central region of the base member body 30 on the back side.

In order to reduce the weight of the lighting device 1, the base member body 30 is preferably made of a lighter metal such as aluminum. In addition, the material of the base member body 30 may be a metal other than aluminum or a material other than metal.

In the base member body 30, a plurality of first holes 31, second holes 32, and third holes 33 are provided. Specifically, a total of three holes, a first hole 31, a second hole 32, and a third hole 33, are set as a group, and these holes have a total of three groups arranged at equal intervals on the same circumference and arranged on the expansion protrusion Around 34. The first hole 31 is a through hole through which a screw (not shown) is passed to fix the reinforcing fitting 100 to the base member body 30. The second hole 32 is a through hole through which the screw 112 (see FIG. 2) passes to fix the light guide plate 70 and the mounting plate 80. In addition, the third hole 33 is a through hole through which a screw 113 (refer to FIG. 13) passes to fix the power supply cover 44 and the lens 50.

(Light source unit) The light source unit 40 is a light source of the lighting device 1 and is turned on by commercially available electricity received through an adapter. In addition, the light source unit 40 includes a mounting substrate 41, a plurality of semiconductor light emitting elements 42, a plurality of electronic components (not shown), and a plurality of connection terminals (not shown).

The mounting substrate 41 has a double-layer structure of, for example, an insulating layer made of ceramics, thermally conductive resin, or the like, and a metal layer made of aluminum or the like, and is formed in a substantially disc shape.

On the main surface on the front side of the mounting substrate 41, a plurality of semiconductor light emitting elements 42, a plurality of electronic elements, and a plurality of connection terminals are embedded. In addition, the plurality of semiconductor light-emitting elements 42, the plurality of electronic elements, and the plurality of connection terminals are electrically connected by a wiring pattern (not shown) provided on the mounting substrate 41. In addition, in one aspect of the disclosed invention, the semiconductor light emitting element 42 and the electronic element are not embedded on the bottom surface of the mounting substrate 41.

In addition, a charging portion protection cover 43 and a power supply cover 44 are arranged on the front side of the base member body 30. The charging part protection cover 43 is a member that protects the charging part by being insulated from the charging part (not shown). The power supply cover 44 is a member for protecting the charging part.

(lens) The lens 50 is a member for condensing or diffusing the light emitted from the light source unit 40, and is arranged on the front side of the light source unit 40.

(Decorative cover) The decorative cover 60 is a member for improving design and preventing insects or dust from being mixed in, and is arranged so as to cover the light source unit 40 on the front side.

(Light guide plate) The light guide plate 70 is used to guide the light emitted from the light source unit 40 to the entirety of the light guide plate 70 and emit the light to the outside in the form of surface light emission, which is an example of the optical member according to the present disclosure. The light guide plate 70 is made by dispersing a diffusion material in a resin material having a certain refractive index, such as acrylic resin such as PC (polycarbonate) resin or PMMA (polymethyl methacrylate) resin. An example of the shape of the light guide plate 70 is a substantially disc shape.

In addition, the optical member according to the present disclosure is not limited to the light guide plate 70, and may be a member that diffuses light emitted from the light source unit 40, such as a diffuser plate, or may collect light emitted from the light source unit 40 Light components, such as lenses.

(Installation board) The mounting plate 80 is a member for holding the cover 90 described later, and is fixed to the base member body 30 with screws (not shown).

(Housing) The cover 90 is formed in a dish shape, for example, and is arranged on the front side of the light guide plate 70 so as to cover the light source unit 40 and the lens 50. In addition, the shape of the cover 90 is not limited to the dish shape, and may have any shape according to the shape of the base member body 30.

The cover 90 is made of a light-transmitting material such as resin such as acrylic resin, PC resin, silicone resin, or glass, and has a white translucent shape. The cover 90 is not limited to a translucent shape, and may be a transparent shape, and may have no color or color. In addition, light diffusion processing may be applied to the surface of the cover 90, that is, a plurality of uneven portions for diffusing light may be provided.

The cover 90 is mounted on the peripheral wall of the mounting plate 80. A claw locking portion 91 for locking the claw portion 81 provided on the peripheral wall portion of the installation plate 80 is formed on the inner peripheral surface of the peripheral wall portion of the cover 90. The cover 90 is fixed to the installation plate 80 by locking the claw portion 81 of the installation plate 80 to the claw locking portion 91.

In addition, in the lighting device 1 according to one aspect of the disclosed invention, the cover 90 is fixed to the mounting plate 80 by the locking structure formed by the claw portion 81 and the claw locking portion 91. However, the fixing method may be screw-on fixing, bonding, press-fitting, etc., and plural methods may be combined.

(Reinforcement accessories) FIG. 4 is a plan view showing the positional relationship between the base member body 30 and the reinforcing fitting 100. FIG. As shown in FIG. 4, the reinforcement fitting 100 has a first screw hole 101, a second screw hole 102 and a third screw hole 103.

The reinforcing fitting 100 is arranged on the back side of the base member body 30 such that the first screw hole 101 is aligned with the first hole 31 (see FIG. 3) of the base member body 30. Furthermore, a screw (not shown) is passed through the first hole 31 from the front side of the base member body 30, and the screw (not shown) is further locked in the first screw hole 101, thereby fixing the reinforcing fitting 100 to the base Component body 30.

In addition, the reinforcing fitting 100 is disposed on the back side of the base member body 30 in such a state that the second screw hole 102 is aligned with the second hole 32 (see FIG. 3) of the base member body 30. In addition, a screw 112 (refer to FIG. 2) is inserted into the second hole 32 from the front side of the base member body 30, and the screw 112 is further locked into the second screw hole 102 to fix the light guide plate 70 and the mounting plate 80 to the base Component body 30.

In addition, the reinforcing fitting 100 is arranged on the back side of the base member body 30 in a state where the position of the third screw hole 103 and the third hole 33 (see FIG. 3) of the base member body 30 are aligned. Moreover, the screw 113 is inserted into the third hole 33 from the front side of the base member body 30, and the screw 113 is further locked into the third screw hole 103, thereby fixing the lens 50 and the power supply cover 44 to the base member body 30.

In addition, in the lighting device 1 according to one aspect of the present disclosure, the reinforcing fittings 100 are arranged at equal intervals (three equals) at equal intervals on the same circumference, but unequal arrangement is also possible. In addition, two or more reinforcing accessories 100 may be arranged.

5 is a perspective view of the reinforcing accessory 100, FIG. 6 is a bottom view of the reinforcing accessory 100 viewed from the front side, FIG. 7 is a top view of the reinforcing accessory 100 viewed from the back side, and FIG. 8 is a view of the reinforcing accessory 100 viewed from the side Of a side view. 9 is a cross-sectional view of AA in FIG. 6, and FIG. 10 is a cross-sectional view of BB in FIG. 6.

As shown in FIGS. 5 to 7, an R portion 104 is formed on one side of the reinforcing fitting 100, and the R portion 104 is bent according to the shape of the outer periphery of the expansion protrusion of the base member body 30. As shown in FIG. 4, when positioning the reinforcing fitting 100 with respect to the base member body 30, as long as the R portion 104 abuts the expansion protrusion 34 and the first screw hole 101 and the first hole 31 are aligned, then The second screw hole 102 is aligned with the second hole 32, and the third screw hole 103 is also aligned with the third hole 33.

Also, as shown in FIGS. 8 to 10, a part of the side of the reinforcing fitting 100 opposite to the side having the R portion 104 (the side away from the expansion protrusion) is folded toward the back side by about At 90 degrees, a bent portion 105 is formed. Since the strength of the reinforcing fitting 100 is improved by the bent portion 105, the reinforcing fitting 100 is not easily deformed, and even the heavier optical member 70 can be stably fixed. 11 is a cross-sectional view showing the structure obtained by fixing the optical member to the base member. Among them, some screws are omitted.

Starting from the front side, the screw 112 is passed through the hole 82 of the mounting plate 80, the hole 72 of the light guide plate 70, the hole 45 of the light source unit 40, and the second hole 32 of the base member body 30, and locked in the reinforcement fitting 100之第二螺孔102。 The second screw hole 102. Specifically, the head 112a of the screw 112 is rotated by a screwdriver or the like, so that the screw portion 112b and the second screw hole 102 of the reinforcing fitting 100 are engaged and locked. In this way, first the gasket 3 contacts the contact surface 82 of the mounting plate 80, the mounting plate 80 is pushed up to the back side, then the mounting plate 80 contacts the contact surface 71 of the light guide plate 70, and the light guide plate 70 faces the back side Was pushed up. Next, the contact surface 72 of the light guide plate 70 contacts the mounting substrate 41 of the light source unit 40, and the light source unit 40 is pushed up toward the back side. Therefore, the mounting plate 80, the light guide plate 70, and the light source unit 40 are fixed to the base member body 30. 12 is a cross-sectional view showing a structure obtained by fixing a lens to a base member. Among them, some screws are omitted.

Starting from the front side, the screw 113 is passed through the hole 51 of the lens 50, the hole 44a of the power supply cover 44, the hole 45 of the light source unit 40, and the third hole 33 of the base member body 30, and locked in the reinforcement fitting 100 Third screw hole 103. Specifically, the head 113a of the screw 113 is rotated by a screwdriver or the like, so that the screw portion 113b and the third screw hole 103 of the reinforcement fitting 100 are engaged and locked. First, the spacer 4 contacts the contact surface 52 of the lens 50, and the lens 50 is pushed up to the back side. Then, the lens 50 contacts the mounting substrate 41 of the light source unit 40, and the light source unit 40 is pushed up to the back side. Moreover, the cylindrical portion 113c of the screw 113 contacts the contact surface 57 of the power supply cover 44, the power supply cover 44 is pushed up to the back side, and then the power supply cover 44 contacts the mounting substrate 41 of the light source unit 40, and the light source unit 40 faces the back The side was pushed up. Therefore, the lens 50, the power supply cover 44, and the light source unit 40 are fixed to the base member body 30.

The reinforcing fitting 100 is made of iron. Comparing the rigidity modulus which is generally used as an indicator of shear stress, it is about 26 GPa relative to aluminum, and about 82 GPa for iron. Therefore, since the rigidity modulus of iron is about three times higher than that of aluminum, even heavier optical members can be stably fixed. In addition, the material of the reinforcing fitting 100 is preferably a metal whose shear stress is higher than aluminum. Examples of metals other than iron suitable for the reinforcement fitting 100 include stainless steel. Furthermore, it is better to have a shear stress equal to or higher than that of the material of the screw. As described above, by using a metal with a high shear stress as the material of the reinforcement fitting 100, the optical member can be stably fixed to the base member body 30 even if it is heavy.

In the disclosed invention, aluminum is used as the base member body 30, and only iron is used for the reinforcement fitting 100, but iron may be used as the base member as a whole.

In addition, in the disclosed invention, the mounting plate 80, the light guide plate 70, and the light source unit 40 are fixed to the base member body 30 using screws 112, but the lens 50 may also be fixed to the base member body 30 with screws 112.

[Variations based on implementation] The lighting device according to the embodiment is described above, but the disclosed invention is not limited to this embodiment.

In the above embodiment, in order to fix the light guide plate 70 and the lens 50 to the base member body 30, a method of screwing the screw to the reinforcing fitting 100 is used for fixing. However, the fixing method may also be riveting or eyelet installation. For example, instead of using the screw 112 inserted from the front side, a rivet is inserted and swaged with a special tool, thereby plastically deforming the end on the opposite side (back side) for joining.

1: Lighting device 2: base member 3: washer 4: Gasket 10: cushioning material 20: Shell 30: base member body 31: First hole 32: Second hole 33: third hole 34: Expansion protrusion 40: light source unit 41: mounting substrate 42: Semiconductor light emitting element 43: Charging part protection cover 44: Power cover 50: lens 44a, 45, 51: holes 52, 57: contact surface 60: Decorative cover 70: light guide plate (optical component) 71: contact surface 72: hole (contact surface) 80: mounting plate 81: claw 82: hole (contact surface) 90: cover 91: Claw locking part 100: Reinforcement accessories (part of the base member) 101: the first screw hole 102: Second screw hole 103: third screw hole 104: Department R 105: bending part 112: screw (fixing member) 113: screw 112a, 113a: head 112b, 113b: Threaded part 113c: barrel

[Fig. 1] A perspective view showing a lighting device according to one aspect of the disclosed invention. [FIG. 2] An exploded perspective view showing a lighting device according to one aspect of the disclosed invention. [Fig. 3] A plan view of the base member body viewed from the back side. [Fig. 4] A plan view showing the positional relationship between the base member body and the reinforcement fitting. [Fig. 5] A perspective view showing a reinforced accessory. [Fig. 6] It is a bottom view when the reinforcement fitting is viewed from the front side. [Fig. 7] It is a plan view of the reinforcing fitting viewed from the back side. [Fig. 8] It is a side view when the reinforcement fitting is viewed from the side. [Fig. 9] AA cross-sectional view in Fig. 6. [FIG. 10] It is the BB sectional view in FIG. [Fig. 11] A cross-sectional view showing a structure obtained by fixing an optical member to a base member. 12 is a cross-sectional view showing a structure obtained by fixing a lens to a base member. 13 is an exploded perspective view showing a lighting device according to one aspect of the present disclosure.

3: washer

30: base member body

32: Second hole

40: light source unit

41: mounting substrate

42: Semiconductor light emitting element

45: Hole

70: Optical components

71: contact surface

72: hole (contact surface)

80: mounting plate

82: hole (contact surface)

100: part of the base member

102: Second screw hole

112: fixed member

112a: head

112b: Threaded part

Claims (4)

A lighting device, including: Light source unit with semiconductor light emitting element; Optical components, so that the light emitted from the light source unit diffuses or condenses; A base member for fixing the optical member; and A fixing member, by engaging with a part of the base member, to fix the optical member to the base member; wherein The part of the base member is composed of a metal whose shear stress is higher than that of aluminum. For example, in the lighting device of claim 1, the metal is iron. For example, the lighting device according to item 1 or 2 of the patent scope, in which The base member has: a base member body; and a reinforcing fitting, which is the part of the base member for the fixing member to engage with; and The reinforced fitting is made of metal with higher shear stress than aluminum. For example, the lighting device according to item 1 or 2 of the patent scope, in which The fixing member is a screw, and a screw hole screwed with the screw is formed in the part of the base member.

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