EP3916288A1

EP3916288A1 - Lamp

Info

Publication number: EP3916288A1
Application number: EP21168817.1A
Authority: EP
Inventors: Xueqiong Chen; Hongkui JIANG
Original assignee: Xiamen Leedarson Lighting Co ltd
Current assignee: Xiamen Leedarson Lighting Co ltd
Priority date: 2020-05-25
Filing date: 2021-04-16
Publication date: 2021-12-01
Also published as: CN212390136U

Abstract

The present application provides a lamp, which includes a housing (100), a first diffusing cover (200), a light source assembly (300), and a second diffusing cover (400); the first diffusing cover (200) and the housing (100) are fit and spliced to form an installing cavity; the light source assembly (300) is built in the installing cavity, the light source assembly (300) includes a substrate (310) and a number of light sources (320) arranged on the substrate (310). The substrate (310) and the inner wall of the first diffusing cover (200) form a first sub-cavity (120); and the second diffusing cover (400) is built in the first sub-cavity (120), and has a light source cavity (410) opening to the substrate (310), the second diffusing cover (400) is connected to the substrate (310), and all the light sources (320) are built in the light source cavity (410). The lamp provided by the present application has a simple structure and can effectively increase the light-emitting angle of the lamp.

Description

TECHNICAL FIELD

This application relates to the technical field of lamps, and more specifically to a lamp.

BACKGROUND

In the current common flat bulbs, their light-emitting angles are generally less than 180 degrees. Such a small light-emitting angle can no longer meet the demand for bulbs with a large angle-emitting angle in the market. In response to this problem, some people in the industry have proposed some design solutions to increase the light-emitting angle of the bulb, for example, arranging LED light sources in different directions, such as arranging a certain proportion of light sources in the vertical direction. Although the light distribution angle can be increased, there are still many problems, such as troublesome circuit design, complicated production process, poor heat dissipation due to the long distance between the LED light source and the heat-dissipating substrate, which may affect the service life of the lamp, and so on. Therefore, designing a bulb that has a simple structure but can effectively increase the light-emitting angle has become an urgent problem in the industry.

SUMMARY

The purpose of the embodiments of the present application is to provide a lamp to solve the technical problem of a small light-emitting angle of the lamp in the prior art.
In order to achieve the above purpose, the technical solution adopted in this application is to provide a lamp, including:

a housing,
a first diffusing cover, which is fit and spliced with the housing to form an installing cavity;
a light source assembly, which is built in the installing cavity, the light source assembly includes a substrate and a number of light sources arranged on the substrate, the substrate and the inner wall of the first diffusing cover form a first sub-cavity; and,
a second diffusing cover, which is built in the first sub-cavity, the second diffusing cover has a light source cavity opening to the substrate, the second diffusing cover is connected to the substrate, and all the light sources are built in the light source cavity.

Optionally, the outer surface of the first diffusing cover is in a form of a flat arc surface, and the second diffusing cover is arranged to be tapered in a direction away from the housing.
Optionally, the outer surface of the second diffusing cover is an arc surface that is tapered in a direction away from the housing.
Optionally, there is a gap between an end of the second diffusing cover away from the housing and the inner wall surface of the first diffusing cover.
Optionally, the haze of the first diffusing cover is smaller than that of the second diffusing cover.
Optionally, the second diffusing cover is further provided with a positioning leg and a connecting buckle, and both the positioning leg and the connecting buckle are spaced from the open edge of the second diffusing cover and both extend in the direction facing to the housing, and the positioning leg and the connecting buckle are relatively spaced apart, and the substrate is provided with a positioning hole for the positioning leg to fit and insert, and a snap-in hole for the connecting buckle to fit and insert.
Optionally, a connecting lug is further provided at the open edge of the second diffusing cover, and a screw hole is provided on the connecting lug.
Optionally, the light source assembly further includes a controlling module which is integrally mounted on the substrate, and located at the periphery of the second diffusing cover.
Optionally, the lamp further includes a heat-dissipating piece, and the substrate is fixed on the heat-dissipating piece.
Optionally, the heat-dissipating piece and the inner wall surface of the housing form a second sub-cavity, the lamp further includes a driving module which is built in the second sub-cavity, and two connecting ends of the driving module are respectively connected to the light source and the controlling module after passing through the heat-dissipating piece.
The beneficial effect of the lamp provided by the present application is that compared with the prior art, the lamp of the present application has a second diffusing cover built in the first diffusing cover, and the second diffusing cover covers all the light sources, so when the lamp emits light, the light emitted by the light source first diffuses through the second diffusing cover, and the light-emitting angle increases. Then, the light with the increased light-emitting angle diffuses through the first diffusing cover, and its light-emitting angle will be further increased, and its average light-emitting angle is greater than or equal to 200 degrees, and the effect of uniform light spot is achieved on the surface of the first diffusing cover. In other words, in the technical solution of the present application, in addition to the simple structure, convenient assembly and easy automated production, the light source can be compactly distributed in the light source cavity of the second diffusing cover, and after the light emitted passes through the first diffusing cover and the second diffusing cover and then diffuses, the light-emitting angle can be effectively increased.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only of the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative labor.

FIG. 1 is a schematic structural diagram of a lamp provided by an embodiment of the application;
FIG. 2 is a left side view of a lamp provided by an embodiment of the application;
FIG. 3 is a cross-sectional view along the S-S direction in FIG. 2;
Fig. 4 is an exploded view of the lamp provided by an embodiment of the application;
Fig. 5 is an exploded view from another angle of the lamp provided by the embodiment of the application.

Reference numbers are described below:

Reference number	Name	Reference number	Name
100	Housing	200	First diffusing cover
300	Light source assembly	400	Second diffusing cover
700	Lamp cap	310	Substrate
320	Light source	120	First sub-cavity
410	Light source cavity	420	Positioning leg
430	Connecting bucket	311	Positioning hole
312	Snap-in hole	440	Connecting lug
330	Controlling module	500	Heat-dissipating piece
130	Second sub-cavity	600	Driving module

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.
It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly or indirectly on the other element. When an element is said to be "connected to" another element, it can be directly or indirectly connected to the other element.
It should also be noted that the terms left, right, up and down in the embodiments of this application are only relative concepts or refer to the normal use state of the product, and should not be considered restrictive.
The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numbers indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present application, but should not be understood as a limitation to the present application.
It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to should have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application.
In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "multiple" means two or more than two, unless otherwise specifically defined.
In this application, unless otherwise clearly specified and defined, the terms "installed", "connected with", "connected", "fixed" and other terms should be understood in a broad sense, for example, it can be connected fixedly or detachably, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.
The embodiment of the application provides a lamp.
Refer to FIGS. 3 to 5. In one embodiment, the lamp includes a housing 100, a first diffusing cover 200, a light source assembly 300 and a second diffusing cover 400. The first diffusing cover 200 and the housing 100 are fitted and spliced to form a mounting cavity; the light source assembly 300 is built in the mounting cavity, and the light source assembly 300 includes a substrate 310 and a number of light sources 320 arranged on the substrate 310. The substrate 310 and the inner wall of the first diffusing cover 200 form a first sub-cavity 120; the second diffusing cover 400 is built in the first sub-cavity 120, the second diffusing cover 400 has a light source cavity 410 opening to the substrate 310, and the second diffusing cover 400 is connected to the substrate 310, and all the light sources 320 are built in the light source cavity 410.
It should be noted here that the technical solution of the present application is particularly suitable for flat bulbs, but other types of lamps with suitable structures can also be applied to the technical solution of the present application. In this embodiment, the light source 320 is specifically LED lamp beads, and a plurality of light sources 320 are compactly distributed on the substrate 310 and are completely covered by the second diffusing cover 400, and the first diffusing cover 200 completely covers the second diffusing cover 400 and the substrate 310. The first diffusing cover 200, the second diffusing cover 400, and the housing 100 can all be made of plastic by injection molding. For example, but not limited to, the first diffusing cover 200 and the second diffusing cover 400 can be made of PC (Polycarbonate) materials to reduce costs.
Based on this structural design, in this embodiment, since the second diffusing cover 400 is built in the first diffusing cover 200, and the second diffusing cover 400 covers all the light sources 320, when the lamp emits light, the light emitted by the light source 320 first diffuses through the second diffusing cover 400, and the light-emitting angle increases. Then, the light with an increased light-emitting angle diffuses through the first diffusing cover 200, and its light-emitting angle will be further increased, and its average light-emitting angle will be greater than or equal to 200 degrees, and the effect of uniform light spot is achieved on the surface of the first diffusing cover 200. In other words, in the technical solution of the present application, in addition to the simple structure, convenient assembly and easy automated production, the light source 320 can be compactly distributed in the light source cavity 410 of the second diffusing cover 400, and after the light emitted passes through the first diffusing cover 200 and the second diffusing cover 400, the light-emitting angle can be effectively increased.
Referring to FIGS. 1 to 3, in this embodiment, the outer surface of the first diffusing cover 200 is in a form of a flat arc surface, and the second diffusing cover 400 is arranged to be tapered in a direction away from the housing 100. Of course, in other embodiments, the first diffusing cover 200 and the second diffusing cover 400 can also have other shapes, but in this embodiment, the optimized shape design of the first diffusing cover 200 and the second diffusing cover 400 can get a better light-diffusing effect, which is beneficial to further increase the light-emitting angle of the lamp. Further, referring to FIGS. 3 to 5, in this embodiment, the outer surface of the second diffusing cover 400 is an arc-shaped surface that is tapered in a direction away from the housing 100, so that the appearance is more beautiful, and with the function of the tapered arc surface, a better light-diffusing effect can be achieved, and the light emitted through the first diffusing cover 200 can be more uniform and softer.
Further, as shown in FIG. 3, in this embodiment, there is a gap between the end of the second diffusing cover 400 away from the housing 100 and the inner wall surface of the first diffusing cover 200. Specifically, the height of the second diffusing cover 400 is about 0.8 times the height of the first diffusing cover 200, that is, the second diffusing cover 400 is slightly shorter than the first diffusing cover 200. It can be understood that the gap between the second diffusing cover 400 and the inner wall surface of the first diffusing cover 200 not only facilitates the heat dissipation of the light source 320, but also prevents the top end of the second diffusing cover 400 from contacting the first diffusing cover 200 and resulting in too concentrated light, causing uneven light output from the lamps.
It should be particularly noted here that in this embodiment, the haze of the first diffusing cover 200 is smaller than that of the second diffusing cover 400. It can be understood that without any changes to the appearance of the lamp, the light of the LED light source 320 is scattered to the side wall of the first diffusing cover 200 through the second diffusing cover 400 that is tapered in the direction away from the housing 100 to increase the light-emitting angle, and then the light is diffused by the first diffusing cover 200 uniformly again. If the haze of the first diffusing cover 200 is greater than that of the second diffusing cover 400, that is, if the haze of the first diffusing cover 200 increases, the light with a large angle already generated by the second diffusing cover 400 will be scattered several times in regional space formed between the second diffusing cover 400 and the first diffusing cover 200 again, resulting in partial loss of the light with a large angle emitted from the second diffusing cover 400; if the haze of the first diffusing cover 200 decreases, the ability of mixing light in the regional space will be reduced to protect the light with a large angle generated by the second diffusing cover 400, and light loss can be reduced at the same time.
Further, referring to FIGS. 3 to 5, in this embodiment, the second diffusing cover 400 is further provided with a positioning leg 420 and a connecting buckle 430, and the positioning leg 420 and the connecting buckle 430 are both spaced apart and extended toward the housing 100 at the open edge of the second diffusing cover 400, and the positioning leg 420 and the connecting buckle 430 are spaced apart and opposing, and the substrate 310 is provided with a positioning hole 311 for the positioning leg 420 to fit and insert, and a snap-in hole 312 for the connecting buckle 430 to fit and insert. In the actual assembly process, the positioning leg 420 can be partially inserted into the positioning hole 311, and then the connecting buckle 430 is buckled into the snap-in hole 312. It is very convenient to assemble. With the spaced arrangement of the positioning leg 420 and the connecting buckle 430, the second diffusing cover 400 can be fixed in place in the front, rear, left, and right directions.
Further, in this embodiment, a connecting lug 440 is further provided at the open edge of the second diffusing cover 400, and a screw hole is provided on the connecting lug 440. Specifically, after the positioning leg 420 and the connecting buckle 430 are assembled, the connecting lug 440 is attached to the surface of the substrate 310, and then the second diffusing cover 400 can be installed on the substrate 310 more fixedly without loosening and falling using a connector such as screw to insert into the screw hole. Here, the connecting lug 440 is preferably arranged adjacent to the positioning leg 420, and the connecting lug 440, the positioning leg 420, and the connecting buckle 430 cooperate altogether to minimize screw assembly while ensuring a stable connection and improving the convenience of assembly of the lamp.
Referring to FIGS. 3 to 5, in this embodiment, the light source assembly 300 further includes a controlling module 330, which is integrated on the substrate 310, and located at the periphery of the second diffusing cover 400. Specifically, in order to reduce space occupation, a notch is provided on one side of the substrate 310, and the controlling module 330 is similar to an L shape, and a part area of it is overlapped and connected to the substrate 310. Here, the notch arrangement of the substrate 310 facilitates the heat dissipation of the controlling module 330 and also facilitates the connection between the controlling module 330 and the driving module 600. In addition, in this embodiment, considering the space integration, since the intelligent controlling module 330 is mounted on the substrate 310, the LED light source 320 is not centralized. However, the multi-layer diffusing cover in the present application can not only increase the light output angle, but also solve the problem of uneven light distribution on both sides of the first diffusing cover 200 when the LED light source 320 is slightly biased to one side on the substrate 310.
Further, as shown in FIGS. 3 and 5, in this embodiment, the lamp further includes a heat-dissipating piece 500, and the substrate 310 is fixed on the heat-dissipating piece 500. In this design, the substrate 310 can be very close to the heat-dissipating piece 500, so the heat of the light source 320 cannot be dissipated well. Specifically, the heat-dissipating piece 500 is preferably made of an aluminum member with good heat dissipation and has a disc shape. The outer edge of the heat-dissipating piece 500 can be overlapped with the inner wall of the housing 100 and clamped inside the housing 100. A plurality of screw holes are provided in the remaining area of the substrate 310, and the substrate 310 can be detachably screwed to the heat-dissipating piece 500 by screws passing through the screw holes. However, the present design is not limited to this. In other embodiments, the substrate 310 and the heat-dissipating piece 500 may also be detachably connected by other methods such as a snap connection.
Further, as shown in FIGS. 3 and 5, the heat-dissipating piece 500 and the inner wall surface of the housing 100 form a second sub-cavity 130, the lamp further includes a driving module 600, which is built in the second sub-cavity 130 , and the two connecting ends of the driving module 600 are respectively connected to the light source 320 and the controlling module 330 through the heat-dissipating piece 500, so that the driving control of the lamp can be realized, and in order to save space, the driving module 600 can be installed vertically . In addition, a lamp cap 700 is further provided at one end of the housing 100 away from the first diffusing cover 200. One end of the lamp cap 700 is connected to an external power source, and the other end is connected to the driving module 600. Electrical energy is provided to the controlling module 330 and the light source 320 etc by the driving module 600.
The above descriptions are only preferred embodiments of this application, and are not intended to limit this application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A lamp, comprising:
a housing (100),

a first diffusing cover (200), which is fit and spliced with the housing (100) to form an installing cavity;

a light source assembly (300), which is arranged in the installing cavity, the light source assembly (300) comprises a substrate (310) and a number of light sources (320) arranged on the substrate (310), the substrate (310) and an inner wall of the first diffusing cover (200) form a first sub-cavity (120); and,

a second diffusing cover (400), which is arranged in the first sub-cavity (120), the second diffusing cover (400) has a light source cavity (410) opening to the substrate (310), the second diffusing cover (400) is connected to the substrate (310), and all the light sources (320) are arranged in the light source cavity (410).
The lamp according to claim 1, wherein an outer surface of the first diffusing cover (200) is in a form of a flat arc surface, and the second diffusing cover (400) is arranged to be tapered in a direction away from the housing (100).
The lamp according to any of the previous claims, wherein an outer surface of the second diffusing cover (400) is an arc-shaped surface that is tapered in a direction away from the housing (100).
The lamp according to any of the previous claims, wherein a gap is arranged between an end of the second diffusing cover (400) away from the housing (100) and an inner wall surface of the first diffusing cover (200).
The lamp according to any of the previous claims, wherein the haze of the first diffusing cover (200) is smaller than that of the second diffusing cover (400).
The lamp according to any of the previous claims, wherein the second diffusing cover (400) is further provided with a positioning leg (420) and a connecting buckle (430), and the positioning leg (420) and the connecting buckle (430) are both spaced apart and extended toward the housing (100) at an open edge of the second diffusing cover (400), and the positioning leg (420) and the connecting buckle (430) are spaced apart and opposite to each other, and the substrate (310) is provided with a positioning hole (311) for the positioning leg (420) to fit and insert, and a snap-in hole (312) for the connecting buckle (430) to fit and insert.
The lamp according to any of the previous claims, wherein a connecting lug (440) is further provided at the open edge of the second diffusing cover (400), and a screw hole is provided on the connecting lug (440).
The lamp according to any of the previous claims, wherein the light source assembly (300) further comprises a controlling module (330) which is integrated on the substrate (310), and the controlling module (330) is located at the periphery of the second diffusing cover (400).
The lamp according to any of the previous claims, wherein the lamp further comprises a heat-dissipating piece (500), and the substrate (310) is fixed on the heat-dissipating piece (500).
The lamp according to claim 9, wherein the heat-dissipating piece (500) and the inner wall of the housing (100) form a second sub-cavity (130), the lamp further comprises a driving module (600) which is arranged in the second sub-cavity (130), the two connecting ends of the driving module (600) are respectively connected to the light source (320) and the controlling module (330) after passing through the heat-dissipating piece (500).