Novel light guide structure
By designing a new light guide structure and utilizing the reflection and refraction principles of the light guide, the problems of low light utilization and cost waste of the light guide ring are solved, and uniform illumination of the transparent ring and reduction of LED costs are achieved.
Patent Information
- Application Number
- CN202422692634.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-05
AI Technical Summary
The existing light guide ring has a low LED light utilization rate, resulting in a large waste of LED costs and poor light uniformity.
A new light-guiding structure is adopted, including a shell, a knob assembly, a light-guiding assembly and a light-transmitting ring. Through the reflection and refraction design of the light guide, the light is emitted toward the top and the side respectively. The light is reflected by the light-transmitting ring and the inner wall of the knob to achieve uniform distribution of light. Only one LED lamp is needed to evenly illuminate the outer ring of the light-transmitting ring and the central area.
The light utilization rate is improved, the LED cost is reduced, and the uniform lighting effect of the light-transmitting circle is achieved.
Smart Images
Figure CN223427217U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electronic appliances, and in particular relates to a novel light guide structure. Background Art
[0002] In recent years, as customers have continuously improved their requirements for the appearance of parts and the quality of appearance, the application of translucent parts and lighting parts in automotive interiors has become more and more common, such as translucent crystal parts, ambient light strips, smart LCD screens, etc.
[0003] The application of these new technologies is inseparable from how to improve the utilization rate of LED lighting. Existing switches include a cover that displays characters and an internal light source. Usually, only one LED is needed to illuminate the characters. However, in order to evenly illuminate the aperture outside the characters, using the traditional light guide ring, four LEDs are required to illuminate the aperture outside the characters, resulting in a large waste of LED costs. Summary of the Invention
[0004] The purpose of this utility model is to overcome the defects of the prior art, provide a new light guide structure, solve the problems of low LED light utilization rate, large LED cost waste and poor light uniformity in traditional light guide rings.
[0005] The technical solution of the utility model is as follows: a novel light-guiding structure comprises a shell, a knob assembly and a light-guiding assembly are arranged in the shell, a PCB board and an LED lamp electrically connected to the PCB board are arranged in the shell, the knob assembly comprises a knob, the light-guiding assembly comprises a light-guiding body fixed relatively to the shell, the light-guiding body is a rotating body which is larger at the top and smaller at the bottom, a light-transmitting ring is arranged on the inside of the knob, the light-transmitting ring covers the light-guiding body, and there is a gap between the outside of the light-transmitting ring and the inner wall of the knob, the light-transmitting ring comprises a dimming plate, the light emitted by the LED lamp is reflected and refracted by the light-guiding body and then emitted from the top or the circumferential side wall to illuminate the entire dimming plate, the light emitted from the top of the light-guiding body can reach the light-transmitting ring and illuminate the central part of the dimming plate, and the light emitted from the circumferential side wall of the light guide can be reflected by the inner wall of the knob to illuminate the outer ring part of the dimming plate.
[0006] By adopting the above technical solution, the light emitted by the LED lamp is transmitted to the light-transmitting ring through the light guide, and the light is reflected and refracted by the wall surface when leaving the light guide, and is emitted toward the top and the side, respectively, illuminating the central part and the outer ring part of the light-transmitting ring, so that the brightness of the central pattern and the aperture part outside the pattern are uniform. Compared with the traditional light guide LED, the light reflected by the upper lamp on the light guide output surface is used to increase the light utilization rate, and the light guide is a rotating body, which meets the propagation of light reflected in all directions and can evenly transmit the light to the circumference. Only one LED lamp can evenly illuminate the outer ring part and the central area of the light-transmitting ring, and the LED cost is lower.
[0007] The utility model is further configured as follows: the center of the end face of the light guide body close to the light-transmitting ring is concave downward to form a light guide surface with an arc surface structure. The light is refracted by the light guide surface and then leaves the light guide body and is emitted upward. The light is reflected by the light guide surface and then is emitted toward the side of the light guide body.
[0008] By further adopting the above-mentioned setting, the top of the light guide is set as an arc-shaped light guide surface to control the reflection direction of the light so that the light can be reflected in the side direction after contacting the light guide surface, thereby utilizing the unrefracted light in the upper part and increasing the light utilization rate.
[0009] The present invention is further configured such that the surfaces of the light-transmitting ring adjacent to the knob are both arc surfaces, and light is reflected by the arc-shaped inner wall of the knob and then emitted upward.
[0010] With the above-mentioned further arrangement, after the light is emitted from the side of the light guide, it enters the circumference of the light-transmitting ring and illuminates it, so that light can also pass through the circumference of the light-transmitting ring to emit light, and after leaving the light-transmitting ring, the light is irradiated on the arc surface of the knob and reflected on the arc surface, so that the light is emitted upward, part of the light re-enters the light-transmitting ring, increasing the brightness of the light-transmitting ring, and part of the light is emitted from the gap between the light-transmitting ring and the knob, so that the light leaving the circumferential side of the light guide can also be emitted upward, illuminating the outer ring part of the dimming plate, allowing people to see the outer ring on the light-transmitting ring clearly, so that the light distribution on the entire light-transmitting ring is uniform.
[0011] The utility model is further configured as follows: the light-transmitting ring further comprises a light-transmitting layer and an external display layer; a sinking groove is provided on the light-transmitting layer; the circumferential side wall of the sinking groove is close to the circumferential side wall of the light guide; and the sinking head surface of the sinking groove is fixed to the top of the light guide by optical glue.
[0012] With the above further arrangement, the light guide is placed in the sink, which is convenient for positioning and installation, and the optical glue can stick and fix the light guide and the light-transmitting ring to prevent the light-transmitting ring from falling off. The optical glue can transmit light to prevent the light from being blocked when it is transmitted from the light guide to the light-transmitting ring, resulting in uneven light distribution.
[0013] A further configuration of the present invention is that the bottom of the light guide includes a spherical surface, and the center of the spherical surface faces the LED lamp.
[0014] With the above further configuration, the spherical surface has a larger area than the plane, so that more light rays emitted by the LED lamp can contact the spherical surface, and more light rays can enter the light guide, thereby improving the light utilization rate of the LED lamp.
[0015] The present invention is further provided with: a rubber sleeve for the light source to pass through is provided between the PCB board and the housing, or a light-transmitting hole is provided in the rubber sleeve corresponding to the position of the LED light.
[0016] With the further arrangement, the rubber sleeve can protect the PCB from external impurities, avoid friction between the PCB and the shell, prolong the service life, and does not affect the light ray propagation of the LED light to the light guide body. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a whole structure schematic view of the embodiment of the utility model;
[0018] Figure 2 It is a half cut structure schematic view of the embodiment of the utility model;
[0019] Figure 3 It is a whole structure schematic view of the light guide body in the embodiment of the utility model;
[0020] Figure 4 It is a whole structure schematic view of the light transmission ring in the embodiment of the utility model;
[0021] Figure 5 It is a structure schematic view of the light guide body and the light transmission ring in the embodiment of the utility model;
[0022] Figure 6 It is a position schematic view of the light guide body and the LED light in the embodiment of the utility model.
[0023] In the drawing: 1, shell; 2, PCB; 3, LED light; 4, light guide body; 41, light guide surface; 42, spherical surface; 5, light shielding piece; 6, light transmission ring; 61, light adjusting sheet; 62, light transmission layer; 621, sink; 63, light display layer; 7, knob; 8, bearing; 9, rubber sleeve. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0025] It should be noted that, in the description of the utility model, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawing), if the certain posture changes, the directional indication also changes accordingly.
[0026] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being described. In the description of this utility model, "several" means at least two, such as two or three, unless otherwise specifically defined.
[0027] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.
[0028] like Figure 1-6 As shown, a new light guide structure includes a shell 1, a knob assembly and a light guide assembly are arranged in the shell 1, a PCB board 2 is fixedly arranged in the shell 1, an LED lamp 3 is electrically connected to the PCB board 2, and the knob assembly includes a knob 7 and a bearing 8, and the knob 7 is arranged to rotate relative to the shell 1 through the bearing 8.
[0029] The light guide assembly includes a light guide body 4 and a light-transmitting ring 6. The light-transmitting ring 6 covers the light guide body 4 and is located inside the knob 7. There is a gap between the outer side of the light-transmitting ring 6 and the inner wall of the knob 7 to prevent the knob 7 from colliding with the light-transmitting mirror 6 when it is rotated.
[0030] The light guide 4 is provided with a shading piece 5 on the outer shell, which is respectively engaged with the light guide 4 and the shell 1 to achieve relative fixation of the light guide 4 and the shell 1. The shading piece 5 can block the light from being diverged inside the shell 1 and reflect part of the light back into the light guide 4, thereby increasing the utilization rate of the light.
[0031] The transparent ring 6 includes a transparent layer 62, a dimming plate 61 and an external display layer 63 from bottom to top. The dimming plate 61 is fixed to the transparent layer 62 and the external display layer 63 on both sides by optical glue. The color change of the dimming plate 61's own base material and surface coating will cause the color of the pattern to change.
[0032] A disc-shaped groove 621 is provided on the light-transmitting layer 62. The circumferential side walls of the groove 621 are aligned with the circumferential side walls of the light guide 4. The countersunk surface of the groove 621 is fixed to the top of the light guide 4 by optical glue. Three groups of matching inserts and sockets are respectively provided on the light-transmitting layer 62 and the light guide 4. The inserts can be inserted into the sockets to further prevent relative rotation between the light-transmitting ring 6 and the light guide 4. The three groups form a triangular structure, which is stable as a whole.
[0033] The light guide body 4 is recessed downward near the end face center of the light transmission ring 6 and is provided with a light guide surface 41 in a circular arc surface structure. After multiple reflections in the light guide body 4, the light finally reaches the light guide surface 41. After the light passes through the light guide surface 41, the light is reflected and refracted. After the light is refracted, the light exits the light guide body 4 upward. After the light is reflected by the light guide surface 41, the light can exit the circumferential side wall of the light guide body 4.
[0034] The light exiting the top end of the light guide body 4 can reach the light transmission ring 6 and illuminate the pattern in the light adjustment sheet 61. The light exiting the circumferential side wall of the light guide body 4 can illuminate the outer periphery of the light transmission ring 6 and the inner wall of the knob 7.
[0035] Further, the surface adjacent to the knob 7 of the light transmission ring 6 is a circular arc surface. The light can be reflected by the circular arc inner wall of the knob 7 and exit upward.
[0036] After the light exits the side wall of the light guide body 4, the light enters the light transmission ring 6 and is illuminated. The light can pass through the outer ring portion of the light transmission ring 6 and contact the side wall to illuminate the light adjustment sheet 62 upward. After the light exits the light transmission ring 6, the light is reflected by the circular arc surface of the knob 7. Part of the light reenters the light transmission ring 6, increasing the brightness of the light transmission ring 6. Part of the light exits the gap between the light transmission ring 6 and the knob 7. The light exiting the circumferential side wall of the light guide body 4 can exit upward. The light reflected by the circumferential side wall is better utilized. The outer ring portion of the light transmission ring 6 can be clearly seen. The light distribution of the light transmission ring 6 is more uniform.
[0037] Further, the light transmission layer 62 is provided with grooves on the circular arc surface adjacent to the knob 7. The grooves can be used as lines. The outer ring portion of the light transmission ring 6 illuminated upward is divided by the grooves and is dark and bright in turn, which is more regular and beautiful.
[0038] The light guide body 4 is provided with a spherical surface 42 protruding downward. The center of the spherical surface 42 is opposite to the LED lamp 3. Compared with a plane, the area of the spherical surface 42 is larger. More light emitted by the LED lamp 3 can contact the spherical surface 42. More light can enter the light guide body 4. The light utilization rate of the LED lamp 3 is higher.
[0039] The rubber sleeve 9 is provided between the PCB board 2 and the shell 1. The rubber sleeve 9 can protect the PCB board 2 from external impurities and avoid friction between the PCB board 2 and the shell 1, prolonging the service life without affecting the light propagation from the LED lamp 3 to the light guide body 4.
[0040] The light guide 4 is a rotating body that is larger at the top and smaller at the bottom, and can be inserted into the light shading member 5 from top to bottom. The side wall of the light guide 4 near the bottom is provided with a raised ring, which is used to contact the bottom of the light shading member 5 for limiting the position. The light shading member 5 is made of plastic and has a certain elasticity. When the light guide 4 is inserted, the ring presses against the inner wall of the light shading member 5 to deform it. After the ring moves downward away from the light shading member 5, the light shading member 5 rebounds and resets. At this time, the bottom surface of the light shading member 5 contacts the ring, and the light guide 4 is larger at the top and smaller at the bottom. The light shading member 5 is used to be inserted into the neck wall of the light guide 4 and contacts and presses against the light guide 4, thereby completing the locking of the light guide 4 and the light shading member 5 to prevent relative shaking in the up and down directions.
[0041] A plug-in is provided on the outside of the light guide 4, and a slot for inserting the plug-in is provided on the circumference of the light shading member 5. During the process of inserting the light guide 4 into the light shading member 5, the plug-in is inserted into the slot, which can prevent the light guide 4 and the light shading member 5 from rotating relative to each other, thereby completing the positioning and installation of the light shading member 5 and the light guide 4.
[0042] Specifically, by setting up a light guide 4 and a transparent ring 6, the light emitted by the LED lamp 3 is transmitted to the transparent ring 6 through the light guide 4, and when the light leaves the light guide 4, it contacts the light guide surface 41 to be reflected and refracted, and is emitted toward the top and the side respectively. The light emitted from the side is reflected by the inner wall of the knob 7 and emitted upward, respectively illuminating the central part of the transparent ring 6 and the outer circular part, and illuminating the pattern of the entire dimming plate 61. Compared with the traditional light guide ring LED, the light reflected by the upper light on the exit surface of the light guide 4 is used to increase the light utilization rate, and the light guide 4 is a rotating body, which meets the propagation of light reflected in all directions, and can evenly transmit the light to the circumference. Only one LED lamp can evenly illuminate the transparent ring 6 and the central area, and the LED cost is lower.
Claims
1. A novel light guide structure, comprising a housing (1), wherein a knob assembly and a light guide assembly are provided in the housing (1), a PCB board (2) and an LED lamp (3) electrically connected to the PCB board (2) are provided in the housing (1), and the knob assembly includes a knob (7), characterized in that: The light guide assembly includes a light guide body (4) fixed relative to the housing (1), the light guide body (4) is a rotating body with a larger upper portion and a smaller lower portion, a light-transmitting ring (6) is provided on the inner side of the knob (7), the light-transmitting ring (6) covers the light guide body (4), a gap exists between the outer side of the light-transmitting ring (6) and the inner wall of the knob (7), the light-transmitting ring (6) includes a dimming plate (61), the light emitted by the LED lamp (3) is reflected and refracted by the light guide body (4) and then emitted from the top or the circumferential side wall to illuminate the entire dimming plate (61), the light emitted from the top of the light guide body (4) can reach the light-transmitting ring (6) and illuminate the central part of the dimming plate (61), and the light emitted from the circumferential side wall of the light guide body (4) can be reflected by the inner wall of the knob (7) to illuminate the outer ring part of the dimming plate (61).
2. A novel light guide structure according to claim 1, characterized in that: The center of the end face of the light guide (4) close to the light-transmitting ring (6) is concave downward to form a light guide surface (41). After the light is refracted by the light guide surface (41), it leaves the light guide (4) and is emitted upward. After the light is reflected by the light guide surface (41), it is emitted toward the side of the light guide (4).
3. A novel light guide structure according to claim 1 or 2, characterized in that: The surfaces of the light-transmitting ring (6) and the knob (7) adjacent to each other are arc surfaces, and light is reflected from the arc-shaped inner wall of the knob (7) and then emitted upward.
4. The novel light guide structure according to claim 1, characterized in that: The light-transmitting ring (6) further comprises a light-transmitting layer (62) and an external layer (63); a sinking groove (621) is provided on the light-transmitting layer (62); the circumferential sidewalls of the sinking groove (621) are aligned with the circumferential sidewalls of the light guide (4); and the countersunk surface of the sinking groove (621) is fixed to the top of the light guide (4) by optical glue.
5. The novel light guide structure according to claim 4, characterized in that: The light-transmitting layer (62) and the light guide (4) are respectively provided with matching inserting strips and inserting holes.
6. The novel light guide structure according to claim 4, characterized in that: Grooves are evenly distributed on the arc surface of the light-transmitting layer (62) close to the knob (7).
7. The novel light guide structure according to claim 1, characterized in that: The outer cover of the light guide (4) is provided with a light shielding member (5), and the light shielding member (5) is respectively engaged with the light guide (4) and the housing (1).
8. The novel light guide structure according to claim 1, characterized in that: The bottom of the light guide (4) includes a spherical surface (42), and the center of the spherical surface (42) faces the LED lamp (3).
9. A novel light guide structure according to claim 1 or 8, characterized in that: A rubber sleeve (9) through which the light source can pass is provided between the PCB board (2) and the housing (1), or a light-transmitting hole is provided in the rubber sleeve (9) at a position corresponding to the LED lamp (3).
10. The novel light guide structure according to claim 1, characterized in that: The knob assembly further comprises a bearing (8), and the knob (7) is arranged to rotate relative to the housing (1) via the bearing (8).