LED module and dust collection device

Abstract

The invention provides an LED module. The LED module comprises an LED light source and a lens, the lens wraps the LED light source, and the lens faces a light inlet face on one side of the LED light source and a light outlet face on one side opposite to the LED light source. The light inlet face and the light outlet face are symmetrically arranged in the first direction, and the light inlet face and the light outlet face are asymmetrically arranged in the second direction. The thickness of the central area, directly facing the LED light source, of the lens is larger than that of other areas; and the thickness of the lens is uniformly thinned from the central area to the two sides along the first direction, and the thickness of the lens is non-uniformly thinned from the central area to the two sides along the second direction. The invention further provides a dust collection device, and the LED module is assembled on the dust collection device.

Description

TECHNICAL FIELD

[0001] The present application relates to a lighting device, in particular to a lighting device for illuminating dust. BACKGROUND

[0002] As the sweeping robot and handheld vacuum cleaner become more and more popular, the user's demand for the visualization of the cleaning effect of the equipment also increases. They hope to clearly observe the dust and other sundries on the ground, and check the cleaning of the ground after cleaning. Therefore, it is urgent to provide a dust display module to realize this function.

[0003] Most of the modules on the market that provide dust display function usually simply arrange LED light sources and increase a transparent shell in structure to protect it. These modules basically do not have secondary optical design, and completely rely on the original light distribution effect of the LED light source. However, the general LED light source light distribution is close to the characteristics of Lambert body (that is, the beam angle in each direction is 120°), which cannot effectively meet the user's demand for clearly displaying dust. SUMMARY

[0004] The main technical problem to be solved by the present application is to provide an LED module which can conveniently illuminate the dust on the ground and will not cause irritation to the human eye.

[0005] In order to solve the above technical problems, the present application provides an LED module, comprising: an LED light source and a lens.

[0006] The lens is wrapped outside the LED light source, and the lens is respectively provided with a light inlet surface facing the LED light source side and a light outlet surface facing away from the LED light source side.

[0007] The light inlet surface and the light outlet surface are respectively symmetrically arranged along a first direction, and the light inlet surface and the light outlet surface are respectively asymmetrically arranged along a second direction; so that the thickness of the lens facing the center region of the LED light source is greater than that of other regions; and the thickness of the lens uniformly thins from the center region to both sides along the first direction, and the thickness of the lens non-uniformly thins from the center region to both sides along the second direction.

[0008] In a preferred embodiment, one side of the light outlet surface of the lens along the second direction is a flat surface connected to the light inlet surface.

[0009] In a preferred embodiment, the beam angle of the LED module in the direction parallel to the ground is 25°.

[0010] In a preferred embodiment, the light spot formed by the LED module in the direction parallel to the ground is an isosceles triangle, and the base angle of the isosceles triangle is not less than 60°.

[0011] In a preferred embodiment: the LED light source is a green LED light source.

[0012] In a preferred embodiment: the material of the lens comprises glass, PC, PMMA or silica gel.

[0013] The application also provides a dust cleaning device equipped with the LED module as described above.

[0014] In a preferred embodiment: the LED module is installed on the front side of the dust cleaning device.

[0015] Compared with the prior art, the technical scheme of the application has the following beneficial effects:

[0016] The application provides an LED module, the light emitting direction of which is almost parallel to the ground, so that the light irradiation leaves obvious long shadows on the ground, highlighting the existence of dust. And through the setting of the lens, most of the light is emitted along the direction parallel to the ground, so that the green light can avoid stimulating the human eye. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a sectional view of the LED module along the first direction in the preferred embodiment of the application;

[0018] Figure 2 is a sectional view of the LED module along the second direction in the preferred embodiment of the application;

[0019] Figure 3 is a schematic view of the light emitting surface of the lens in the preferred embodiment of the application;

[0020] Figure 4 is a schematic view of the light entering surface of the lens in the preferred embodiment of the application;

[0021] Figure 5 is a schematic view of the light emitting of the LED module in the preferred embodiment of the application;

[0022] Figure 6 is a schematic view of the light spot formed by the LED module in the preferred embodiment of the application;

[0023] Figure 7 is a schematic view of the light emitting range of the LED module in the preferred embodiment of the application;

[0024] Figure 8 is a schematic view of the light distribution of the LED module in the preferred embodiment of the application;

[0025] Figure 9 is an exploded view of the dust cleaning device in the preferred embodiment of the application;

[0026] Figure 10A schematic view of the use of the dust collection device in a preferred embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative effort based on the embodiments in the present application shall fall within the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be wall-mounted connection, can be detachable connection, or integral connection, can be mechanical connection, can be electrical connection, can be direct connection, can be indirect connection through an intermediate medium, can be internal communication of two elements, and for a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] Reference Figures 1-8 The present embodiment provides an LED module, comprising: an LED light source 1 and a lens 2;

[0031] The lens 2 is wrapped outside the LED light source 1, and the lens 2 respectively faces the light entrance surface 21 on one side of the LED light source 1 and the light exit surface 22 on the side opposite to the LED light source 1;

[0032] The light entrance surface 21 and the light exit surface 22 are respectively symmetrically arranged along the first direction, and the light entrance surface 21 and the light exit surface 22 are respectively asymmetrically arranged along the second direction; so that the thickness of the lens 2 facing the center area of the LED light source 1 is greater than that of other areas; and the thickness of the lens 2 is uniformly thinned from the center area to both sides along the first direction, and the thickness of the lens 2 is non-uniformly thinned from the center area to both sides along the second direction.

[0033] In addition, in order to cut off the light emitted by the LED module, the light emitting surface 22 of the lens 2 is a flat surface 23 connected to the light receiving surface 21 along one side of the second direction. The flat surface 23 forms a cut-off surface, so that a cut-off line is formed in the height direction of the light emitted by the LED module. In this way, the emitted light can be projected onto the ground as much as possible, increasing the dust display effect.

[0034] In addition, the light beam angle of the LED module in the direction parallel to the ground is 25°. The light spot formed by the LED module in the direction parallel to the ground is an isosceles triangle, and the base angle of the isosceles triangle is not less than 60°. In order to increase the dust display effect, the LED light source 1 is a green LED light source 1. In this embodiment, the material of the lens 2 includes glass, PC, PMMA or silicone.

[0035] Embodiment 2

[0036] Reference Figures 9-10 This embodiment provides a dust collector, which applies the LED module in Embodiment 1. The LED module described above can also be applied in products such as a sweeping robot, a window cleaning robot and a mopping robot.

[0037] The above description is only a preferred embodiment of the present application, but the design concept of the present application is not limited to this. Any person skilled in the art can make non-essential changes to the present application within the technical scope disclosed by the present application, and such changes shall not be regarded as departing from the scope of the present application.

Claims

1. An LED module, characterized in that... include: LED light source and lens; The lens is wrapped around the LED light source, and the lens has a light-inlet surface facing the LED light source and a light-outlet surface facing away from the LED light source. The light-inlet surface and the light-outlet surface are symmetrically arranged along the first direction, and the light-inlet surface and the light-outlet surface are asymmetrically arranged along the second direction, so that the thickness of the central region of the lens facing the LED light source is greater than that of other regions; and the thickness of the lens decreases uniformly from the central region along the first direction to both sides, and the thickness of the lens decreases unevenly from the central region along the second direction to both sides.

2. The LED module according to claim 1, characterized in that: The light-emitting surface of the lens is a flat surface connected to the light-incoming surface on one side along the second direction.

3. An LED module according to claim 1, characterized in that: The LED module has a beam angle of 25° in the direction parallel to the ground.

4. An LED module according to claim 1, characterized in that: The light spot formed by the LED module in the direction parallel to the ground is an isosceles triangle, and the base angle of the isosceles triangle is not less than 60°.

5. An LED module according to claim 1, characterized in that: The lens is made of materials including glass, PC, PMMA, or silicone.

6. An LED module according to claim 1, characterized in that: The LED light source is a green LED light source.

7. A vacuuming device, characterized in that... The LED module according to any one of claims 1-6 is assembled.

8. A vacuuming device according to claim 7, characterized in that: The LED module is installed on the front side of the vacuum cleaner.

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