Circuit breaker

Abstract

The embodiment of the utility model provides a circuit breaker. The circuit breaker includes: a housing including a light emitting hole; a circuit board disposed within the housing; the light source is electrically connected to the circuit board and is suitable for emitting light according to control signals of the circuit board; the light guide part is arranged in the shell and located between the light source and the light-emitting hole, and the light guide part comprises a light inlet end which is arranged at the position corresponding to the light source and comprises a light inlet face allowing light of the light source to enter the light guide part; the light outlet end is arranged on one side far away from the light inlet end along the extension direction of the light guide piece and comprises a light outlet surface which is at least partially coupled in the light emitting hole; the reflecting section is arranged between the light inlet end and the light outlet end in the extending direction and comprises a plurality of reflecting surfaces, and the reflecting surfaces are suitable for diverging light entering the light guide part from the light inlet surface to different areas of the light outlet surface. Therefore, uniform light distribution can be ensured, and meanwhile, the utilization efficiency of the light source is also improved.

Description

Technical Field

[0001] The exemplary embodiments disclosed herein generally relate to the field of household appliances, and particularly to a circuit breaker. Background Technology

[0002] In electrical equipment, circuit breakers typically require a light source to provide status indication or illumination, enabling operators to clearly understand the equipment's operating status. To meet this need, electrical equipment often employs light guides as light-guiding elements to achieve effective light transmission and diffusion from the light source to the external luminous area of ​​the electrical equipment. As an optical element, the light guide is widely used in the indicating function of circuit breakers; it guides the light emitted from the light source to the luminous area, ensuring the brightness of the indicator light. Utility Model Content

[0003] In a first aspect of this disclosure, a circuit breaker is provided. The circuit breaker includes: a housing including a light-emitting aperture; a circuit board disposed within the housing; a light source electrically connected to the circuit board and adapted to emit light according to a control signal from the circuit board; and a light guide disposed within the housing and between the light source and the light-emitting aperture, the light guide including: a light-inlet end disposed at a position corresponding to the light source and including a light-inlet surface for light from the light source to enter the light guide; a light-outlet end disposed along the extending direction of the light guide on a side away from the light-inlet end and including a light-outlet surface at least partially coupled within the light-emitting aperture; and a reflective section disposed along the extending direction between the light-inlet end and the light-outlet end, and including a plurality of reflective surfaces adapted to radiate light entering the light guide from the light-inlet surface to different regions of the light-outlet surface.

[0004] In embodiments according to this disclosure, through the synergistic effect of the light-inlet end, the light-outlet end, and multiple reflective surfaces, light is effectively reflected and diffused within the light guide, thereby ensuring that the light uniformly covers the light-outlet surface. This light guide not only significantly improves the utilization efficiency of the light source and reduces light loss, but also provides a uniform and high-brightness luminous effect with fewer light sources. Furthermore, the overall structure of this light guide is compact and inexpensive. Other benefits will be described below in conjunction with corresponding embodiments.

[0005] In some embodiments, the reflective section is arranged such that the incident angle from the light-incident surface to the plurality of reflective surfaces is greater than the critical angle of the light guide.

[0006] In some embodiments, the plurality of reflective surfaces includes at least: a first reflective surface disposed on a side near the light-inlet end and adapted to diffuse light entering from the light-inlet surface into a first region of the light-outlet surface; and a second reflective surface disposed adjacent to the first reflective surface and adapted to diffuse light into a second region of the light-outlet surface.

[0007] In some embodiments, the light-incoming surface is smaller than the light-outgoing surface.

[0008] In some embodiments, the light-incoming surface and the light-outgoing surface are not parallel.

[0009] In some embodiments, the multiple reflective surfaces are all curved surfaces.

[0010] In some embodiments, at least some of the multiple reflecting surfaces are planes that are not parallel or coplanar with each other.

[0011] In some embodiments, each of the plurality of reflective surfaces has a different curvature.

[0012] In some embodiments, the light source includes a single point light source.

[0013] It should be understood that the content described in this content section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0014] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0015] Figure 1 A schematic diagram of the structure of a light guide according to some embodiments of the present disclosure is shown. Detailed Implementation

[0016] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0017] In the description of embodiments of this disclosure, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions may also be included below. The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0018] As briefly mentioned earlier, light guides in circuit breakers are used to guide and transmit light. However, existing light guides are limited by manufacturing costs, space constraints, and optical effects, resulting in certain structural limitations. Specifically, due to the structural and production cost constraints of electrical equipment, it is difficult to use complex light-emitting devices to achieve uniform light distribution. Some existing electrical equipment uses multiple light sources (such as multiple LED beads) to achieve uniform illumination from the front light source, but this method increases the manufacturing cost and structural complexity of the product and makes it difficult to miniaturize or integrate the design.

[0019] To address, or at least partially address, the aforementioned problems or other potential problems of conventional circuit breakers, embodiments of this disclosure provide a circuit breaker solution. According to an embodiment of this disclosure, the circuit breaker includes: a housing including a light-emitting aperture; a circuit board disposed within the housing; a light source electrically connected to the circuit board and adapted to emit light according to a control signal from the circuit board; and a light guide disposed within the housing and located between the light source and the light-emitting aperture, the light guide including a light-inlet end. The light-inlet end is positioned corresponding to the light source and includes a light-inlet surface for light from the light source to enter the light guide. Further, the light guide includes a light-exit end. The light-exit end is disposed along the extending direction of the light guide on a side away from the light-inlet end and includes a light-exit surface at least partially coupled within the light-emitting aperture. Further, the light guide includes a reflective section. The reflective section is disposed along the extending direction between the light-inlet end and the light-exit end and includes multiple reflective surfaces adapted to radiate light entering the light guide from the light-inlet surface to different areas of the light-exit surface.

[0020] In this way, the light guide component is equipped with multiple reflective surfaces. After the light enters the light-incoming surface, it is gradually diffused and distributed to the light-outgoing surface through the multiple reflective surfaces of the reflection section. Through multiple reflective surfaces, the light can evenly cover different areas of the light-outgoing surface, avoiding the phenomenon of light concentration or excessive diffusion, thereby improving the warning effect of the circuit breaker and making the brightness of the entire light-emitting area consistent, avoiding visual discomfort or uneven brightness problems caused by uneven light source distribution.

[0021] Meanwhile, through the multiple reflective surfaces of the light guide, the light undergoes total internal reflection inside the light guide, minimizing light loss and ensuring that most of the light is effectively emitted from the light-emitting surface. In other words, these multiple reflective surfaces can significantly improve the light utilization efficiency of the light source, enabling high brightness and uniform light emission even with a small number of light sources, while reducing energy consumption and material costs.

[0022] The following will combine Figure 1This section describes an example structure of the light guide 100 of a circuit breaker. Switching devices according to embodiments of this disclosure may include circuit breakers. The concept of this disclosure will be described below using a circuit breaker as an example; it should be understood that the same applies to other switching devices, and will not be described in detail below.

[0023] The circuit breaker according to an embodiment of this disclosure includes a housing, a circuit board, a light source, and a light guide 100. Specifically, the housing includes a light-emitting hole. The size and shape of the light-emitting hole can be arranged according to actual needs, and are not specifically limited in the embodiments of this disclosure. A circuit board is disposed within the housing for generating control signals. The light source is electrically connected to the circuit board. The light guide 100 is disposed within the housing and located between the light source and the light-emitting hole. The light source emits light according to the control signal from the circuit board, and the emitted light enters the light guide 100. The position of the light source matches the light-inlet surface 1101 of the light guide 100, ensuring that the light emitted by the light source can enter the light guide 100 and propagate effectively. For example, the light source is an LED light source.

[0024] The light guide 100 is used to guide the light emitted by the light source and to uniformly disperse the light to the light emitting surface 1201 through the multiple reflective surfaces 131 of the light guide 100. The specific structure of the light guide 100 will be described in detail below.

[0025] The specific structure of the light guide 100 will be described below. For example... Figure 1 As shown, the light guide 100 according to an embodiment of the present disclosure generally includes a light-inlet end 110, a light-outlet end 120, and a reflective section 130. Through the configuration of the light-inlet end 110, the light-outlet end 120, and the reflective section 130, the light guide 100 can guide and diffuse the light emitted by the light source, reducing the number of light sources and lowering costs, while ensuring a uniform distribution of light in the light-emitting area (i.e., the light-emitting surface 1201).

[0026] Specifically, the light-inlet end 110 is positioned corresponding to the light source to ensure that the light emitted by the light source can accurately enter the light guide 100. Further, the light-inlet end 110 includes a light-inlet surface 1101. This light-inlet surface 1101 is used to receive light from the light source and guide it into the light guide 100. The position, size, and angle of the light-inlet surface 1101 can be matched with the light source to maximize the light guiding efficiency.

[0027] The light-emitting end 120 is arranged in the extending direction of the light guide 100 and on the side away from the light-inlet end 110. The light-emitting end 120 includes a light-emitting surface 1201. The light-emitting surface 1201 is at least partially coupled within the light-emitting aperture of the housing. The light-emitting surface 1201 is used to uniformly output the light transmitted through the light guide 100 to the light-emitting area of ​​the circuit breaker to provide status indication or lighting functions.

[0028] The reflective section 130 is located between the light-inlet end 110 and the light-outlet end 120, and is arranged along the extending direction of the light guide 100. The reflective section 130 is used to guide light and distribute it evenly to the light-outlet end 120. The reflective section 130 includes multiple reflective surfaces 131. The reflective section 130 uses multiple reflective surfaces 131 to effectively disperse light, so that light can illuminate different areas on the light-outlet surface 1201.

[0029] In some embodiments, the light source includes a single point light source. This point light source may be a light source with characteristics such as high brightness, small size, and low power consumption. Although the light source is a single point light source, the light emitted from it is effectively diffused and guided by the light guide 100, ensuring a uniform light emission effect on the light-emitting surface 1201.

[0030] A single point light source is positioned corresponding to the light-entry surface 1101 of the light guide 100 to ensure that light can accurately enter the light guide 100 from the point light source. The light-entry surface 1101 can be arranged according to the optical characteristics of the point light source to ensure that light can enter the light guide 100 at a suitable angle and distribution, avoiding light loss within the light guide 100.

[0031] In some embodiments, the reflective section 130 is arranged such that the angle of incidence of light rays from the light-incident surface 1101 to the plurality of reflective surfaces 131 is greater than the critical angle of the light guide 100. Specifically, after entering the reflective section 130, the light rays can be sufficiently reflected and effectively guided out of the light-emitting end 120, thereby reducing light loss and improving the utilization efficiency of the light source.

[0032] In the light guide 100, after light enters from the light-incident surface 1101, it is reflected by multiple reflecting surfaces 131 of the reflecting section 130. According to optical principles, when the incident angle of light is greater than the critical angle of the light guide 100, the light will undergo total internal reflection on the reflecting surface and will not escape through the reflecting surface. It can be understood that the incident angle refers to the angle between the light ray and the normal when the light ray is incident from an optically denser medium (such as the light guide 100) to an optically less dense medium (such as air). To ensure that most light rays can undergo total internal reflection, in some embodiments, the critical angle of the light guide 100 is determined by the material of the light guide 100. The critical angle is represented by the symbol (C) and can be obtained by the following formula (1).

[0033]

[0034] Wherein, n1 is the refractive index of the optically denser medium, n2 is the refractive index of the optically less dense medium, and n1 > n2. Exemplarily, in some embodiments, the incident angle can be adjusted to a critical angle greater than 42 degrees, thereby ensuring that light can be effectively guided and reflected to the light-emitting surface 1201 of the light-emitting end 120. Furthermore, the light guide 100 can be made of materials such as glass or plastic.

[0035] In this way, the reflective section 130 can minimize light loss within the light guide 100, prevent light leakage, and ensure that light is evenly distributed to the light-emitting area (i.e., the light-emitting surface 1201). Simultaneously, controlling the incident angle not only improves light reflection efficiency but also enhances the overall optical performance of the light guide 100, enabling the desired light emission effect and uniform light-emitting area to be achieved even with a smaller number of light sources. Furthermore, total internal reflection helps reduce unnecessary energy consumption and extend the lifespan of the light source, further reducing production costs and material consumption.

[0036] In some embodiments, the plurality of reflective surfaces 131 include at least a first reflective surface 1311 and a second reflective surface 1312. By arranging at least two reflective surfaces, the light entering from the light-inlet surface 1101 can be effectively guided and uniformly distributed within the light guide 100, thereby ensuring that the light is uniformly irradiated to different areas on the light-outlet surface 1201, thereby improving the uniformity of light distribution and optical efficiency.

[0037] Specifically, the first reflective surface 1311 is arranged on one side near the light-inlet end 110 to guide and diffuse the light entering from the light-inlet surface 1101 to a first region of the light-outlet surface 1201. To ensure that the light can be effectively diffused, the angle and curvature of the first reflective surface 1311 can be selected according to actual needs so that it can guide the light to a specific region on the light-outlet surface 1201 at an appropriate angle.

[0038] The second reflective surface 1312 is arranged adjacent to the first reflective surface 1311 to guide and diffuse light entering from the light-incoming surface 1101 to a second region of the light-emitting surface 1201. Compared to the first reflective surface 1311, the second reflective surface 1312 has a different curvature or reflection angle so that it can uniformly diffuse light to different parts of the light-emitting area, avoiding light concentration or excessive scattering.

[0039] Through the cooperation of the first reflective surface 1311 and the second reflective surface 1312, the light guide 100 can achieve uniform light distribution, ensuring uniform light distribution throughout the entire light-emitting area and avoiding situations where the light is too strong or too weak in certain areas. It should be noted that the light-emitting area (i.e., the light-emitting surface 1201) is composed of the first area and the second area.

[0040] like Figure 1As shown, exemplarily, the center (O) of the light-emitting element (i.e., the light source) is arranged at the center of the light-inlet surface 1101. Light enters the light guide 100 from the light-inlet surface 1101, is reflected by multiple reflective surfaces (EF), and diffuses to the light-emitting surface (CD), forming a uniform light emission effect. Further, the multiple reflective surfaces (EF) include reflective surface AE and reflective surface AF, both of which are arc segments protruding outwards from the light guide. The center of the arc segment AF is O1, and the center of the arc segment AE is O2.

[0041] Specifically, the boundary light OE of the effective light-emitting area of ​​the light-emitting element, after being reflected by the reflective surface AE, has a reflected light path of EC. That is to say, the light is reflected by the reflective surface AE and guided out of the area of ​​the light surface BC.

[0042] Similarly, after the boundary light OF is reflected by the reflecting surface AF, the reflected light path is FD, and the light is guided by the reflecting surface AF to the area of ​​the emitting surface BD. By adjusting the position and curvature of the reflecting surfaces AE and AF, the diffusion direction and intensity of different light rays can be controlled to ensure uniform light distribution in the emitting area.

[0043] In addition, the light rays OA can be reflected at 90°, with the reflected light path being AB. These reflected rays are emitted from the area of ​​the light-emitting surface (CD), further ensuring the uniform distribution of light in the light-emitting area.

[0044] Light rays within area AOF are reflected by reflective surface AF and emitted from light-emitting surface segment BD; light rays within area AOE are reflected by reflective surface AE and emitted from light-emitting surface segment BC. In this way, light rays, after passing through different reflective surfaces within the light guide, can cover the entire target light-emitting area (i.e., light-emitting surface CD).

[0045] In some embodiments, the light-inlet surface 1101 is smaller than the light-outlet surface 1201. Specifically, the size of the light-inlet surface 1101 is smaller than that of the light-outlet surface 1201, so that the light from the light guide 100 is reflected and diffused internally through the reflective section 130, thereby ensuring that the light can uniformly cover the entire light-outlet area. The size of the light-inlet surface 1101 is matched according to the light source, which can reduce the beam spread when the light source enters the light guide 100 and concentrate the light entering the light guide 100. As the light propagates within the light guide 100, the multiple reflective surfaces 131 of the reflective section 130 gradually diffuse the light, eventually distributing it uniformly to the light-emitting area through the light-outlet surface 1201.

[0046] In other words, after light enters the light guide 100 through the smaller light-inlet surface 1101, it can be diffused through the reflective section 130. Utilizing the optical effects within the reflective section 130, it ensures that the light can ultimately illuminate the area of ​​the light-emitting surface 1201 uniformly. The larger size of the light-emitting surface 1201 allows the light to cover a wider luminous area, thereby improving the luminous effect and visual uniformity.

[0047] In some embodiments, the light-inlet surface 1101 and the light-outlet surface 1201 are not parallel; specifically, there is a certain angular deviation between the light-inlet surface 1101 and the light-outlet surface 1201. This facilitates flexible adjustment of the light source position, improves the propagation path of light within the light guide 100, enhances the uniformity of light distribution, and ensures that the final light can be effectively diffused to the desired light-emitting area. For example, the light-inlet surface 1101 and the light-outlet surface 1201 are perpendicular to each other.

[0048] By arranging the light-inlet surface 1101 and the light-outlet surface 1201 as non-parallel, after the light enters from the light-inlet surface 1101, its propagation path will undergo total internal reflection through the reflective section 130 inside the light guide 100. In this way, the light can be reflected inside the light guide 100, thereby achieving more efficient diffusion and avoiding the problems of concentrated or uneven light distribution.

[0049] Furthermore, the angular deviation between the light-inlet surface 1101 and the light-outlet surface 1201 allows light to diffuse in different directions as it passes through the reflector section 130, ensuring that the light ultimately output through the light-outlet surface 1201 covers the entire light-emitting area. This angular deviation can be adjusted according to actual needs to achieve optimal light distribution. By reasonably setting the angle between the light-inlet surface 1101 and the light-outlet surface 1201, the uniformity of the light source output can be improved, avoiding uneven light emission caused by excessive light concentration or excessive diffusion.

[0050] In some embodiments, the multiple reflective surfaces 131 are all arc-shaped surfaces, which can control the propagation path and reflection direction of light, achieve uniform diffusion of light, thereby improving optical performance, ensuring that light can be accurately transmitted from the light-inlet end 110 to the light-outlet end 120, and effectively cover the light-emitting area. It should be noted that the reflective surface of the reflective section 130 is an arc-shaped surface that bulges outward from the light guide element 100.

[0051] Specifically, the curved reflective surface has a certain curvature, the size and shape of which can be selected according to actual needs to ensure the light diffusion effect. Each curved reflective surface can guide light in different directions as it passes through, thus avoiding excessive light concentration or localized low light intensity. The curved reflective surface allows light to be gradually diffused within the light guide 100, ultimately uniformly illuminating different areas on the light-emitting surface 1201. The curved reflective surface effectively utilizes the total internal reflection characteristic of light, improving the optical performance of the light guide 100, resulting in higher light transmission efficiency within the light guide 100, and significantly improving light uniformity.

[0052] Furthermore, multiple curved reflective surfaces with different curvatures can diffuse light in different areas, avoiding excessive light concentration or insufficient local light emission. Especially after the light from the light source enters the light guide 100, the curved reflective surfaces can gradually guide the light to the predetermined light-emitting area, ensuring uniform light distribution on the light-emitting surface 1201.

[0053] In some embodiments, the multiple reflective surfaces 131 may all be planar, enabling control over the propagation path and reflection direction of light, achieving uniform light diffusion, thereby ensuring that light can be accurately transmitted from the light-inlet end 110 to the light-outlet end 120 and effectively cover the light-emitting area. At least some of the multiple reflective surfaces are non-parallel or non-coplanar planes. That is, the multiple planes are arranged to be non-parallel or non-coplanar. Each plane can guide the light in a different direction when light passes through, thereby avoiding the problems of excessive light concentration or localized low light intensity. The planar arrangement allows the light to be gradually diffused within the light guide 100, ultimately uniformly illuminating different areas on the light-outlet surface 1201.

[0054] Compared with a flat reflective surface, a curved reflective surface can better adapt to light with different incident angles, making the propagation of light within the light guide 100 smoother and effectively reducing light loss.

[0055] In some embodiments, the reflective section 130 utilizes reflective surfaces with different curvatures to effectively disperse light, enabling light to illuminate different areas on the light-emitting surface 1201, thereby ensuring a more uniform light distribution in the light-emitting area. In other words, by arranging the reflective surfaces as arc surfaces with different curvatures, the reflection path and distribution of light can be improved, further enhancing the optical performance of the light guide 100 and ensuring that light can be uniformly distributed on the light-emitting surface 1201, avoiding problems of light concentration or unevenness.

[0056] Furthermore, multiple reflective surfaces 131 are arranged inside the light guide 100 along the path of light propagation, each with a different curvature. The difference in curvature allows for precise control of the reflection angle and diffusion direction of light as it passes through different reflective surfaces. Reflective surfaces with smaller curvatures reflect light to farther areas, while those with larger curvatures guide light to relatively closer areas, thus achieving uniform light diffusion and preventing excessive concentration of light in any particular area. Adjusting the curvature of the reflective surfaces ensures that light is evenly distributed on the light-emitting surface 1201, guaranteeing uniform light intensity across the entire light-emitting area and preventing significant differences in brightness.

[0057] Reflective surfaces with different curvatures can adjust the propagation path of light according to the incident angle and direction of light, thereby optimizing the light distribution. When the light emitted from the light source passes through the multiple reflective surfaces 131 inside the light guide 100, each reflective surface changes the propagation direction of the light through its specific curvature, ensuring that the light covers the predetermined light-emitting area. This allows even if the light source is a single point light source, the light can be evenly distributed to the light-emitting surface 1201 after passing through the light guide 100, achieving a highly efficient and uniform light emission effect.

[0058] By employing reflective surfaces with different curvatures, the light reflection effect is improved, reducing light waste and loss, while simultaneously increasing the optical efficiency of the light guide 100. The difference in reflective surface curvature not only effectively diffuses light but also avoids uneven light emission caused by excessive focusing or diffusion, thereby enhancing the overall performance of the circuit breaker.

[0059] It is understandable that multiple reflective surfaces are planar, and by changing the arrangement angle of each plane, light can also illuminate different areas on the light-emitting surface 1201. The working process of both is similar and will not be described in detail here.

[0060] Various implementations of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed implementations. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described implementations. The terminology used herein is chosen to best explain the principles, practical applications, or improvements to technology in the market, or to enable others skilled in the art to understand the various implementations disclosed herein.

Claims

1. A circuit breaker, characterized in that, include: The housing includes the light-emitting aperture; The circuit board is arranged inside the housing; A light source, electrically connected to the circuit board, is adapted to emit light according to a control signal from the circuit board; as well as A light guide element is disposed within the housing and located between the light source and the light-emitting aperture, the light guide element comprising: The light-inlet end (110) is arranged at a position corresponding to the light source and includes a light-inlet surface (1101) for the light from the light source to enter the light guide. The light-emitting end (120) is arranged on a side away from the light-inlet end (110) along the extending direction of the light guide, and includes a light-emitting surface (1201) at least partially coupled within the light-emitting aperture; and A reflective section (130) is arranged along the extending direction between the light-inlet end (110) and the light-outlet end (120), and includes a plurality of reflective surfaces (131) adapted to radiate light entering the light guide from the light-inlet surface (1101) to different areas of the light-outlet surface (1201).

2. The circuit breaker according to claim 1, characterized in that, The reflective section (130) is arranged such that the incident angle from the light-incoming surface (1101) to the plurality of reflective surfaces (131) is greater than the critical angle of the light guide.

3. The circuit breaker according to claim 1, characterized in that, The plurality of reflective surfaces (131) include at least: A first reflecting surface (1311) is arranged on a side close to the light-inlet end (110) and is adapted to diffuse the light entering from the light-inlet surface (1101) into a first region of the light-outlet surface (1201); and The second reflecting surface (1312) is arranged adjacent to the first reflecting surface (1311) and is adapted to diffuse the light into a second region of the light-emitting surface (1201).

4. The circuit breaker according to any one of claims 1-3, characterized in that, The light-inlet surface (1101) is smaller than the light-outlet surface (1201).

5. The circuit breaker according to claim 4, characterized in that, The light-inlet surface (1101) and the light-outlet surface (1201) are not parallel.

6. The circuit breaker according to any one of claims 1-3 and 5, characterized in that, All of the multiple reflective surfaces (131) are arc-shaped surfaces.

7. The circuit breaker according to any one of claims 1-3 and 5, characterized in that, At least some of the plurality of reflecting surfaces (131) are non-parallel or non-coplanar planes.

8. The circuit breaker according to claim 6, characterized in that, Each of the plurality of reflecting surfaces (131) has a different curvature.

9. The circuit breaker according to claim 1, characterized in that, The light source includes a single point light source.

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