Lamp indication structure and living electric appliance
By setting a protruding first light-incident surface between the light-emitting part and the light-incident part of the light guide seat, the incident angle of light is adjusted, which solves the problem of uneven brightness of the light-emitting part in household appliances and achieves a more uniform lighting effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN TCL SOFTWARE DEV
- Filing Date
- 2025-06-17
- Publication Date
- 2026-04-21
AI Technical Summary
In the lighting structure of common household appliances, there is a problem of uneven brightness in the light-emitting part. In particular, the obstruction of the light-emitting part causes dark areas to form on the inside of the light-emitting part, affecting the overall brightness uniformity.
By setting a protruding first light-incident surface between the light-emitting part and the light-incident part of the light guide seat, the incident angle of the light is adjusted so that the light is deflected to the inside of the light-emitting part and avoids the light-blocking part. The high refractive index material of the light guide seat and the light refraction characteristics of the light source enhance the light illumination inside the light-emitting part.
It effectively reduces the dark area inside the light-emitting part, improves the brightness uniformity of the light-emitting part, enhances light utilization, and improves the overall lighting effect of the lamp structure.
Smart Images
Figure CN224150747U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lighting technology, and in particular to a lighting structure and a household appliance. Background Technology
[0002] Common household appliances, such as knobs and adjustment buttons, often incorporate various lighting structures, including backlights and ambient lights. For example, an illumination ring might be added around the edge of an adjustment knob. A typical knob includes a light guide base with a ring-shaped light-emitting section on the upper side and a light-receiving section on the lower side. A light-shielding section is located inside the light-emitting section, while the light-receiving section is horizontally positioned. The vertical projection of the light-emitting section lies within the light-receiving section, and the light source is located below the light-shielding section. When light from the light source reaches the first light-receiving section, it is refracted. Some of the refracted light is absorbed by the light-shielding section, while the remaining light is refracted away from the light-shielding section and illuminates the light-emitting section. The inner side of the light-emitting section is blocked by the light-shielding section, creating a dark area. The refracted light from the light-receiving section cannot easily reach this dark area, resulting in uneven brightness in the light-emitting section. Utility Model Content
[0003] The main purpose of this invention is to propose a lamp structure and household appliance that aims to improve the problem of uneven brightness in the light-emitting part.
[0004] To achieve the above objectives, the present invention proposes a lighting structure comprising:
[0005] A light guide base includes a light emitting portion and a first light receiving portion. The light emitting portion is annularly arranged and has a light emitting surface. Along the axis of the light emitting portion, the first light receiving portion and the light emitting portion are at least partially opposite to each other.
[0006] A light source is disposed on the side of the first light-incident portion facing away from the light-emitting portion, and the light source is correspondingly located inside the light-emitting portion; and...
[0007] A light-shielding part is provided inside the light-emitting part and outside the light source, along the axis of the light-emitting part, and at least part of the light-shielding part is located between the light-emitting part and the light source;
[0008] The first light-incident portion has a first light-incident surface protruding away from the light-outceasing portion, which is used to deflect and refract the light projected by the light source inward to avoid the light-shielding portion and project it onto the light-outceasing surface.
[0009] This utility model also proposes a household appliance, including the aforementioned lamp indicator structure.
[0010] The indicator structure includes:
[0011] A light guide base includes a light emitting portion and a first light receiving portion. The light emitting portion is annularly arranged and has a light emitting surface. Along the axis of the light emitting portion, the first light receiving portion and the light emitting portion are at least partially opposite to each other.
[0012] A light source is disposed on the side of the first light-incident portion facing away from the light-emitting portion, and the light source is correspondingly located inside the light-emitting portion; and...
[0013] A light-shielding part is provided inside the light-emitting part and outside the light source, along the axis of the light-emitting part, and at least part of the light-shielding part is located between the light-emitting part and the light source;
[0014] The first light-incident portion has a first light-incident surface protruding away from the light-outceasing portion, which is used to deflect and refract the light projected by the light source inward to avoid the light-shielding portion and project it onto the light-outceasing surface.
[0015] In the technical solution of this utility model, by protruding the first light-incident part, the light emitted from the light source illuminates the first light-incident part, and the corresponding incident point is directly opposite the light-emitting part; along the direction of the first light-incident part close to the light-emitting part, at least a portion of the normal of the first light-incident part is offset towards the axis of the light-emitting part, so that after the light emitted from the light source illuminates the first light-incident part, the light passing through the first light-incident part is offset towards the axis of the light-emitting part; the incident point of the light is directly opposite the light-emitting part, so that the light illuminates the inner side of the light-emitting part, so that the light projected by the light source avoids the light-blocking part, reduces the dark area on the inner side of the light-emitting part, and improves the problem of uneven brightness of the light-emitting part as a whole. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a lamp indicator in the prior art;
[0018] Figure 2 for Figure 1 A schematic diagram of the optical path of the lamp structure in the diagram;
[0019] Figure 3 A schematic diagram of an embodiment of the indicator structure provided by this utility model;
[0020] Figure 4 for Figure 3 A cross-sectional structural diagram of the lamp display structure in the image;
[0021] Figure 5 for Figure 4 A schematic diagram of the optical path of the first ray in the lamp display structure;
[0022] Figure 6 for Figure 4 A schematic diagram of the optical path of the second ray in the lamp structure;
[0023] Figure 7 for Figure 4 A schematic diagram of the optical path of the third ray in the lamp display structure;
[0024] Figure 8 A schematic diagram of the structure of an embodiment of the household appliance provided by this utility model.
[0025] Explanation of icon numbers:
[0026] Explanation of reference numerals in prior art:
[0027] 1. Light guide base; 2. Light emitting part; 3. Light entering part; 4. Light blocking part; 5. Light source; 6. Dark area; 7. First ray; 8. Second ray; 9. Third ray.
[0028] Explanation of reference numerals in the accompanying drawings of this utility model:
[0029] 100. Lamp structure; 1. Light guide base; 11. Light emitting part; 111. Light emitting surface; 12. First light entrance part; 121. First light entrance surface; 13. Second light entrance part; 131. Second light entrance surface; 14. Mounting groove; 15. Clearance surface; 16. Reflective surface; 2. Light source; 21. Lamp bead; 3. Light shield; 4. First ray beam; 5. Second ray beam; 6. Third ray beam;
[0030] 200. Household appliances; 7. Housing; 8. Circuit board.
[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0035] Common household appliances, such as knobs and adjustment buttons, often incorporate various lighting features, including backlighting and ambient lighting. For example, an illuminated ring may be added around the edge of an adjustment knob. (See also...) Figure 1 and Figure 2 A common knob includes a light guide base 1, with an annular light-emitting part 2 formed on the upper side and a light-incoming part 3 formed on the lower side. A light-shielding part 4 is provided inside the light-emitting part 2. The light-incoming part 3 is horizontally arranged. The projection of the light-emitting part 2 in the vertical direction is located inside the light-incoming part 3. The light source 5 is located below the light-shielding part 4. The light emitted by the light source 5 is refracted after hitting the first light-incoming part 3. Some of the light is refracted and then hits the light-shielding part 4, where it is absorbed. The other part of the light is refracted and avoids the light-shielding part 4, and then shines on the light-emitting part 2.
[0036] The inner side of the light-emitting part 2 is blocked by the light-shielding part 4, forming a dark area 6. The refracted light emitted from the light-incident part 3 cannot easily illuminate the dark area 6. Specifically, there is a critical first ray 7. The first ray 7 passes through the light-shielding part 4 and illuminates the light-emitting part 2. The area illuminated by the first ray 7 is the edge of the dark area 6. The light source 5 also emits a second ray 8 and a third ray 9. The second ray 8 is located outside the first ray 7. The incident point of the second ray 8 is outside the incident point of the first ray 7. The incident angle of the second ray 8 is greater than the incident angle of the first ray 7, so that the refracted ray of the first ray 7 is located outside the refracted ray of the first ray 7. That is, the first ray 7 cannot illuminate the dark area 6, and the first ray 7 can directly illuminate the light-emitting part 2 outside the dark area 6.
[0037] The third ray 9 is located inside the first ray 7, and the incident point of the third ray 9 is inside the incident point of the first ray 7. The incident angle of the third ray 9 is smaller than that of the first ray 7, causing the refracted light of the third ray 9 to illuminate the light-shielding part 4. In summary, it is difficult to directly illuminate the dark area 6, resulting in uneven brightness of the light part 2.
[0038] This utility model proposes a lamp indicator structure.
[0039] Please see Figure 3 and Figure 4 In one embodiment of this utility model, the lighting structure 100 includes a light guide base 1, a light source 2, and a light-shielding part 3. The light guide base 1 has a light-emitting part 11 and a first light-incident part 12. The light-emitting part 11 is arranged in a ring shape and has a light-emitting surface 111. Along the axis of the light-emitting part 11, the first light-incident part 12 and the light-emitting part 11 are at least partially opposite to each other. The light source 2 is located on the side of the first light-incident part 12 facing away from the light-emitting part 11, and the light source 2 is correspondingly located inside the light-emitting part 11. The light-shielding part 3 is located inside the light-emitting part 11 and outside the light source 2. Along the axis of the light-emitting part 11, the light-shielding part 3 is at least partially located between the light-emitting part 11 and the light source 2. The first light-incident part 12 has a first light-incident surface 121 protruding from the light-emitting part 11, which is used to deflect the light projected by the light source 2 inward to avoid the light-shielding part 3 and project it onto the light-emitting surface 111.
[0040] In the technical solution of this utility model, the refractive index of the light guide seat is greater than that of air. By protruding the first light-incident part 12, the light emitted from the light source 2 illuminates the first light-incident part 12, and the corresponding incident point is directly opposite the light-emitting part 11. Along the direction of the first light-incident part 12 close to the light-emitting part 11, at least part of the normal of the first light-incident part 12 is offset towards the axis of the light-emitting part 11. After the light emitted from the light source 2 illuminates the first light-incident part 12, the light passing through the first light-incident part 12 is offset towards the axis of the light-emitting part 11. The incident point of the light is directly opposite the light-emitting part 11, so that the light illuminates the inner side of the light-emitting part 11, and the light projected by the light source 2 avoids the light-shielding part 3, reducing the dark area on the inner side of the light-emitting part 11, and improving the problem of uneven brightness of the light-emitting part 11 as a whole.
[0041] The light guide base 1 can be made of any material with light-transmitting properties, such as plastic. The light-emitting surface 111 only needs to ensure a certain degree of light transmission, and is not limited here. The light source 2 can be any feasible lighting source 2, such as LED lights, OLED lights, and cold light sheets, etc., and is not limited here. Specifically, the light source 2 is an LED light. The light-shielding part 3 can be a light-shielding block disposed on the inner side of the light-emitting part 11 or a light-shielding surface with a light-shielding coating, and is not limited here.
[0042] Please see Figure 4 and Figure 5 The first ray 4 emitted by the light source 2 has its incident point directly facing the light-emitting part 11. The first ray 4 has a corresponding normal. Along the direction of the first incident part 12 close to the light-emitting part 11, the normal is offset towards the axis of the light-emitting part 11, so that the first ray 4 passes through the first incident part and is offset towards the inside of the light-emitting part 11, thereby causing the first ray 4 to illuminate the inside of the light-emitting part 11, thereby increasing the brightness of the dark area.
[0043] Along the axial direction of the light-emitting part 11, the projection of the light-emitting part 11 is located inside the first light-incident part 12, which can refract more light and direct it to the inner region of the light-emitting part 11, thereby increasing the brightness of the inner region of the light-emitting part 11.
[0044] From the outside to the inside, the protrusion height of the first light-incident portion 12 gradually increases. Along the direction of the first light-incident portion 12 near the light-emitting portion 11, the normal of the first light-incident portion 12 is offset towards the axis of the light-emitting portion 11. After the light emitted from the light source 2 illuminates the first light-incident portion 12, the light rays passing through the first light-incident portion 12 are all offset towards the axis of the light-emitting portion 11.
[0045] From the outside in, the rate of increase in the protrusion height of the first light-incident part 12 gradually decreases, which can prevent the first light-incident part 12 from blocking the light and ensure that the light source 2 illuminates the first light-incident part 12. By increasing the angle of offset of the normal of the first light-incident part 12, the angle of offset of the refracted light at the corresponding point can be increased, thereby increasing the offset of the refracted light towards the inside of the light-emitting part 11, and thus increasing the illumination of the light-emitting part.
[0046] The first light-incident surface 121 is provided as an arc surface. The first light-incident surface 121 can be a single arc surface or it can be formed by connecting multiple arc surfaces. There is no limitation here. Specifically, the first light-incident surface 121 is an involute.
[0047] The light source 2 includes multiple LED beads 21, which are spaced apart circumferentially along the light guide base 1. The multiple LED beads 21 work together to emit light more evenly to the periphery, resulting in more uniform light distribution and brightness of the light-emitting surface 111. The number of LED beads 21 can be two, three, or more, and is not limited here. Specifically, there are six LED beads 21, which are equally spaced apart.
[0048] The light source 2 includes a ring-shaped light strip. It can emit light more evenly to the periphery, making the light more uniform and the brightness of the light-emitting surface 111 more uniform.
[0049] Please see Figure 4 and Figure 6 The light guide base 1 has a second light-incident portion 13 at one end facing away from the light-emitting portion 11. The second light-incident portion 13 is located inside the first light-incident portion 12 and is recessed towards the light-emitting portion 11 to form a second light-incident surface 131. The second light-incident surface 131 is at least partially located outside the light source 2 and is used to deflect the light projected by the light source 2 outward to avoid the light-shielding portion 3. By setting the second light-incident surface 131 to be recessed, along the direction of the second light-incident portion 13 near the light-emitting portion 11, the normal of the second light-incident surface 131 can be shifted circumferentially towards the light-emitting portion 11, and the normal of the second light-incident surface 131 can be deflected away from the light-shielding portion 3, reducing the obstruction of light passing through the second light-incident surface 131 by the light-shielding portion 3, thereby allowing more light to pass through the light-shielding portion 3 and increasing the amount of light entering the light guide base 1.
[0050] The light source 2 emits a second ray 5, which passes through the second incident surface and is refracted to reach the light emitting surface 111. This increases the brightness of the light emitting part 11.
[0051] The second light-incident surface 131 is adjacent to the first light-incident surface 121. By aligning the second light-incident surface 131 with the first light-incident surface 121, the utilization of light emitted by the lamp source can be improved.
[0052] Please see Figure 4 and Figure 7 The outer surface of the light guide 1 is at least partially provided with a reflective portion for reflecting at least a portion of the light refracted from the second light-incident surface 131 toward the light-emitting surface 11. The normal of the second light-incident surface 131 is offset circumferentially toward the light-emitting surface 11, causing the normal of the second light-incident surface 131 to deviate away from the light-shielding portion 3 and illuminate the reflective portion. Through the reflective portion, at least a portion of the light can illuminate the light-emitting surface 111, increasing the brightness of the light-emitting surface 111. Specifically, the light source 2 emits a third ray 6, which passes through the second incident surface and is refracted to the reflective surface. The reflective surface can reflect at least a portion of the light onto the light-emitting surface 111, increasing the brightness of the light-emitting surface 111.
[0053] The reflective part can be fully reflective or partially transparent, and there is no limitation here. Specifically, the partial transparency of the reflective surface can increase the brightness of the reflective surface.
[0054] The second light-incident surface 131 is configured as an arc surface, and the radius of curvature of the second light-incident surface 131 is R, where 4.5mm≤R≤5mm. The radius of curvature of the second light-incident surface 131 can be selected as needed and is not limited here; specifically, the value of R is 4.7mm.
[0055] The second light-incident surface 131 includes multiple curved segments connected in the inward and outward directions. The radii of curvature of the multiple curved segments gradually increase from the inside to the outside. From the outside to the inside, the distance between the second light-incident surface 131 and the light-shielding part 3 can be increased, so that more light avoids the light-shielding part 3.
[0056] The light guide base 1 has a mounting groove 14 at one end of the light emitting part 11. The mounting groove 14 is located inside the light emitting part 11, and the light-shielding part 3 is disposed within the mounting groove 14. The light-shielding part 3 can be the inner wall surface of the mounting groove 14, or it can be a light-shielding component disposed within the mounting groove 14, which is not limited here. When the light-shielding part 3 is the inner wall surface of the mounting groove 14, a light-shielding coating can be sprayed onto the inner wall of the mounting groove 14; the light-shielding component is an opaque component, thus achieving light shielding of the area of the mounting groove 14.
[0057] The light guide seat 1 has a recessed avoidance surface 15 on the side facing away from the mounting groove 14. The avoidance surface 15 is provided corresponding to the mounting groove 14 and is adjacent to the second incident surface. By providing the avoidance surface 15, the avoidance surface 15 can be prevented from blocking the light source 2, so as to ensure that the light source 2 shines directly on the second incident surface.
[0058] Please see Figure 4 and Figure 8 This utility model also proposes a household appliance 200, which includes a lighting structure 100. The specific structure of the lighting structure 100 is as described in the above embodiments. Since this household appliance 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0059] The household appliance 200 includes a housing 7, a knob, and a circuit board 8. The knob is rotatably mounted on the housing 7 and is rotatably disposed relative to the circuit board 8. The circuit board 8 is fixedly connected to the housing 7. The light source 2 is disposed on the circuit board 8 and is electrically connected to the circuit board 8.
[0060] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A light indicating structure, characterized by include: A light guide base includes a light emitting portion and a first light receiving portion. The light emitting portion is annularly arranged and has a light emitting surface. Along the axis of the light emitting portion, the first light receiving portion and the light emitting portion are at least partially opposite to each other. A light source is disposed on the side of the first light-incident portion facing away from the light-emitting portion, and the light source is correspondingly located inside the light-emitting portion; and... A light-shielding part is provided inside the light-emitting part and outside the light source, along the axis of the light-emitting part, and at least part of the light-shielding part is located between the light-emitting part and the light source; The first light-incident portion has a first light-incident surface protruding away from the light-outceasing portion, which is used to deflect and refract the light projected by the light source inward to avoid the light-shielding portion and project it onto the light-outceasing surface.
2. The lighting structure of claim 1, wherein The protrusion height of the first light-incident part gradually increases from the outside to the inside.
3. The lighting structure of claim 2, wherein, The first light-incident surface is set as an arc-shaped curved surface.
4. The lighting structure of claim 1, wherein, The light guide seat has a second light-incident portion at one end facing away from the light-emitting portion. The second light-incident portion is located inside the first light-incident portion and is recessed toward the light-emitting portion to form a second light-incident surface. The second light-incident surface is at least partially located outside the light source and is used to deflect the light projected by the light source outward to avoid the light-shielding portion.
5. The lighting structure of claim 4, wherein, The outer surface of the light guide seat is provided with a reflective part at least partially to reflect at least part of the light refracted from the second light incident surface toward the light emitting part.
6. The lighting structure of claim 4, wherein, The second incident surface is configured as a circular arc surface with a radius of curvature of R, where 4.5 mm ≤ R ≤ 5 mm; and / or, The second light-incident surface includes multiple curved surface segments connected in the inward and outward directions, and the radii of curvature of the multiple curved surface segments gradually increase from the inside to the outside.
7. The light show structure of claim 4, wherein, The second incident surface is adjacent to the first incident surface.
8. The lighting structure of claim 1, wherein, The light source includes multiple LED beads, which are spaced apart circumferentially along the light guide base; or, The light source includes a ring-shaped light strip.
9. The lighting structure of claim 8, wherein, The light guide seat has a mounting groove at one end of the light emitting part, the mounting groove is located inside the light emitting part, and the light shielding part is located inside the mounting groove.
10. A domestic appliance, characterized in that Includes the lighting structure as described in any one of claims 1 to 9.