Light-emitting display module of knob switch

Abstract

The utility model provides a light-emitting display module of a knob switch, which aims to enable light of an LED to uniformly emit light in a ring shape around the knob switch, can improve identifiability in different flickering modes, and has a power-saving function. The light-emitting display module comprises a light guide plate and a light shielding sheet which is arranged above the light guide plate and is provided with an annular light-transmitting part, three arc-shaped concave parts which are inwards concave towards the center are arranged on the outer periphery of the light guide plate, and the three arc-shaped concave parts are arranged at equal intervals of 360 degrees; an LED irradiating towards the corresponding arc-shaped concave part is arranged on the outer side of each arc-shaped concave part, so that light rays of the LEDs can be uniformly scattered towards the light guide plate through the concave lens effect of the arc-shaped concave parts and then are transmitted around the knob switch through the annular light transmitting part of the anti-dazzling screen.

Description

Technical Field

[0001] The utility model relates to a light-emitting display module applied to a knob switch, and in particular to a module which enables LED light to be scattered and emitted evenly around the knob switch. Background Art

[0002] Traditional stoves use a knob switch to adjust the firepower. However, during use, users can only roughly assess the firepower by visually observing the angle of the knob. They may even have to lower their head to observe the size of the real flame to confirm. This is inconvenient and inaccurate.

[0003] In view of the above-mentioned deficiencies in the use of traditional stoves, the creators have developed a luminous knob, such as patents CN207196551U and Taiwan TWM554547U. Its lighting method not only displays the operating status of the burner, but also uses sensors to detect the position of the knob, so that the luminous part will display the fire power level through corresponding light changes.

[0004] Another known structure is to provide a lighting device around the knob switch. Figure 1 As shown, it includes an annular base 1 fixed around the outer periphery of the knob switch, and two LEDs 2 are respectively set on both sides of the annular base 1. The two LEDs 2 on the same side illuminate in alternating directions to the left and right, so that the staggered illumination of the four LEDs 2 can refract and evenly distribute the light within the annular base 1 through the staggered illumination, and then pass upward through the light-transmitting portion on the cooker.

[0005] Although the above-mentioned prior art has a simple structure, saves costs, and has the function of luminous display, the multiple LEDs not only consume power, but also become particularly bright at the LED light-emitting position and at the intersection A of the light, resulting in uneven illumination. Moreover, it can only indicate whether the stove is running and cannot be linked to the knob switch to indicate the fire level. In terms of functionality, it is inferior to the inventor's previous designs such as CN207196551U and Taiwan TW M554547U.

[0006] In view of this, the creators of this invention, based on the requirement of uniform light to make the luminous display more textured, specially designed a luminous display module for use in knob switches. It not only overcomes the various shortcomings of existing technologies, but also has the advantages of saving power, easy installation, and appropriate response to the fire size of the knob switch. Utility Model Content

[0007] The purpose of the utility model is to provide a light-emitting display module for a knob switch, which aims to allow the light of the LED to emit light in a ring shape evenly around the knob switch, and can improve recognition in different flashing modes, while also having a power-saving function.

[0008] To achieve the above objectives, the present invention provides a light-emitting display module for a rotary switch. The light-emitting display module is disposed around the rotating shaft of a rotary switch and includes a generally annular light guide plate and a light shielding sheet shielding the light guide plate. The module is characterized by:

[0009] The light shielding sheet has an annular light-transmitting portion, and three arc-shaped recessed portions concave toward the center are provided on the outer periphery of the light guide plate. The three arc-shaped recessed portions are arranged at 360 degrees, and an LED is provided on the outer side of each arc-shaped recess, irradiating toward the corresponding arc-shaped recess. The light from each LED can be evenly scattered within the light guide plate through the concave lens of the corresponding arc-shaped recess, and then pass through the annular light-transmitting portion of the light shielding sheet around the knob switch.

[0010] Through the above structure, the utility model utilizes the principle that concave lenses can scatter light, and provides three arc-shaped recesses on the light guide plate. After each LED passes through the corresponding arc-shaped recess and is evenly scattered within the light guide plate, it is then transmitted through the annular light-transmitting portion. This allows the light-emitting display module of the knob switch to provide a more textured lighting effect with minimal power consumption.

[0011] The following further describes the implementation of each component:

[0012] During implementation, a second arc recess capable of dispersing light is provided between the outer periphery and the inner periphery of the light guide plate at a position relative to each arc recess. The second arc recess and the corresponding arc recess together form a concave lens to disperse light.

[0013] During implementation, the light guide plate is provided with a plurality of closely distributed focusing holes between every two arc-shaped recesses, and each focusing hole can respectively focus the light passing therethrough, so that the light guide plate emits light uniformly through the plurality of focusing holes between every two arc-shaped recesses.

[0014] During implementation, the plurality of LEDs are arranged on a circuit board that is roughly hook-shaped. The circuit board is arranged at the bottom of the light guide plate so that the three LEDs are fixed at positions relative to the three arc-shaped recesses respectively and the three LEDs are electrically connected to each other.

[0015] In implementation, the knob switch is a power control knob for a stove, and the circuit board is further provided with a connector that is electrically connected to the electronic control system of the stove knob switch or the stove thermocouple, so that each LED can illuminate with different brightness and / or flashing modes relative to the rotational position of the knob switch or the voltage change signal of the stove thermocouple to enhance recognition.

[0016] During implementation, the outer contour shape of the shading sheet is roughly the same as that of the light guide plate, and they are stacked up and fixed on a base; the top surface of the base is provided with a positioning groove for accommodating the circuit board and the light guide plate, and a sleeve is protruding upward from the center of the positioning groove for the knob switch shaft to pass through, and the shading sheet and the center of the light guide plate are respectively inserted into the outer periphery of the sleeve.

[0017] During implementation, the outer periphery of the sleeve of the base is provided with external threads for a positioning cap with internal threads to be screwed on the outer periphery of the sleeve, so that the bottom of the positioning cap can press the shading sheet, light guide plate and circuit board down and position them on the base.

[0018] During implementation, the knob switch is a fire control knob of a stove, and the stove has a light-transmitting panel with a through-hole for the sleeve to pass through, and the light-shielding sheet is arranged on the bottom surface of the light-transmitting panel so that the annular light-transmitting portion of the light-shielding sheet is located around the through-hole of the light-transmitting panel.

[0019] During implementation, a rubber pad capable of preventing moisture and oil from penetrating is provided between the inner periphery of the sleeve of the base and the rotating shaft.

[0020] During implementation, the bottom outer edge of the knob switch and the bottom outer edge of the positioning cap are respectively provided with an annular inclined surface capable of reflecting light.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. This invention utilizes the light scattering principle of biconcave lenses to provide three curved recesses within the light guide plate. These allow each LED to evenly scatter light within the light guide plate through its corresponding curved recess, emitting light with varying brightness and / or in a flashing manner. Compared to conventional illuminated knobs that use four LEDs, this invention uses only three LEDs, allowing for even light transmission around the knob switch, thus achieving both power savings and improved legibility.

[0023] 2. The light shielding sheet, circuit board and light guide plate of the present invention are stacked and fixed on a base to form a modular structure, which can be quickly installed under the light-transmitting panel and has the advantage of easy installation.

[0024] Based on the technical means of the present invention, the following lists implementation methods suitable for the present invention and describes them with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a schematic diagram of the LED structure of a conventional light emitting device.

[0026] Figure 2 This is a three-dimensional exploded view of the present invention.

[0027] Figure 3This is a schematic diagram of the three LED lights being evenly scattered by the light guide plate of the present invention.

[0028] Figure 4 for Figure 3 The AA cross-sectional view shows that the concave hole focuses the light passing through it.

[0029] Figure 5 for Figure 3 Schematic diagram of uniformly scattered light passing through the annular light-transmitting portion.

[0030] Figure 6 This is a combined appearance diagram of the utility model.

[0031] Figure 7 This is a cross-sectional view of the structure of the utility model combined with a stove.

[0032] Figure 8 This is a structural cross-sectional view of the second embodiment of the present utility model.

[0033] Explanation of the reference numerals: 100 - light-emitting display module; 200 - rotating shaft; 300 - light-transmitting panel; 301 - perforation; 400 - rotary switch; 10 - light guide plate; 11 - arc-shaped recess; 12 - second arc recess; 13 - light-focusing recess; 20 - light-shielding plate; 21 - annular light-transmitting portion; 30 - LED; 31 - circuit board; 32 - connector; 40 - base; 41 - positioning groove; 42 - sleeve; 43 - positioning cap; 431 - annular slope; 44 - rubber pad. DETAILED DESCRIPTION

[0034] like Figures 2 to 4 As shown, the present invention provides a light-emitting display module for a knob switch. The light-emitting display module 100 is arranged around a rotating shaft 200 of a knob switch (not shown) and can emit light evenly. It can also enhance recognition by flashing in different ways and has a power-saving function.

[0035] The light-emitting display module 100 includes a generally annular light guide plate 10 and a light shielding sheet 20 shielding the light guide plate 10. The light shielding sheet 20 is characterized in that: the light shielding sheet 20 has an annular light-transmitting portion 21, and three arc-shaped recesses 11 concave inward toward the center are provided on the outer periphery of the light guide plate 10. The three arc-shaped recesses 11 are arranged at 360 degrees, and an LED 30 is provided on the outer side of each arc-shaped recess 11 to illuminate the corresponding arc-shaped recess 11.

[0036] like Figures 3 to 5As shown, when the light-emitting display module 100 is in operation, the light from each LED 30 can be evenly scattered within the light guide plate 10 through the concave lens effect of the corresponding arc-shaped recess 11. The light scattered by the light guide plate 10 can then pass through the annular light-transmitting portion 21 of the light-shielding sheet 20 to be evenly transmitted around the knob switch. In this way, the light-emitting display quality can be improved with minimal LED power consumption.

[0037] As shown in the figure, a second arc recess 12 is provided between the outer periphery and the inner periphery of the light guide plate 10 at a position relative to each arc recess 11. Each arc recess 11 and the corresponding second arc recess 12 together form a concave lens, so that the light emitted by the corresponding LED 30 can be evenly scattered through the principle of light scattering by the concave lens. Compared with the conventional illuminated knob that requires the use of four LEDs, the present invention uses only three LEDs to achieve the function of uniform light display and save energy.

[0038] In addition, in order to evenly display light at locations far from the LEDs and make the light-emitting display module emit light more evenly, the light guide plate 10 is provided with a plurality of closely distributed light-gathering recesses 13 between each two arc-shaped recesses 11. Each of the light-gathering recesses 13 can focus the light passing through, so that the light guide plate 10 emits light evenly between each two arc-shaped recesses 11 through the plurality of light-gathering recesses 13. Figure 4 Only a part of the light-concentrating recessed holes 13 is used as an example to represent the state where light is concentrated.

[0039] like Figure 2 As shown, when the light-emitting display module 100 is implemented, the plurality of LEDs 30 are arranged on a circuit board 31 that is roughly hook-shaped, such as a 7-shape, a C-shape, a V-shape, a U-shape, etc., so that the three LEDs 30 are respectively fixed at positions relative to the three arc-shaped recesses 11, and the three LEDs 30 are electrically connected to each other.

[0040] The hook-shaped circuit board 31 is disposed at the bottom of the light guide plate 10 and is equipped with a connector 32. The connector 32 is electrically connected to the external electronic control system of the knob switch (not shown), allowing each LED 30 to illuminate with different brightness and / or flashing patterns in response to the rotation of the knob switch, thereby enhancing identification. Taking a stove as an example, the connector 32 can obtain the rotational position of the knob switch through the stove's electronic control system, or the voltage change signal between the minimum and maximum flames detected by the thermocouple during the stove combustion, allowing the circuit board 31 to control the LED 30 to emit different colors or intensities of light accordingly.

[0041] Furthermore, the light shielding sheet 20 has the same outer shape as the light guide plate 10, and is stacked with the hook-shaped circuit board 31 and fixed on a base 40, thereby forming a Figure 6Specifically, the top surface of the base 40 is provided with a positioning groove 41 for accommodating the light guide plate 10 and the circuit board 31. A sleeve 42 is protruding upward from the center of the positioning groove 41 for the shaft 200 to pass through. The light shielding sheet 20 and the center of the light guide plate 10 are respectively inserted into the outer periphery of the sleeve 42.

[0042] The outer periphery of the sleeve 42 of the base 40 is provided with external threads for a positioning cap 43 with internal threads to be screwed onto the outer periphery of the sleeve 42 so that the bottom of the positioning cap 43 can press down the light shielding sheet 20, the light guide plate 10 and the circuit board 31 to be positioned on the base 40.

[0043] During implementation, the knob switch can be a fire control knob for a gas water heater or a fire control knob for a stove. Figure 7 、 Figure 8 Take the stove's fire control knob as an example.

[0044] As shown in the figure, the cooker is provided with a light-transmitting panel 300, which is provided with a through-hole 301 for the sleeve 42 of the base 40 to pass through from bottom to top. After the light-emitting display module 100 is modularized, the sleeve 42 can be directly set on the periphery of the rotating shaft 200, and the light-shielding sheet 20 is allowed to abut against the bottom surface of the light-transmitting panel 300, so that the annular light-transmitting portion 21 of the light-shielding sheet 20 is located around the through-hole 301 of the light-transmitting panel 300. Then, the positioning cap 43 is screwed and positioned on the sleeve 42 from top to bottom, so that the light-emitting display module 100 can be locked on the bottom surface of the light-transmitting panel 300, and the bottom of the positioning cap 43 is used to press down the light-transmitting panel 300, thereby indirectly pressing down the light-shielding sheet 20, the light guide plate 10 and the circuit board 31 to be positioned on the base 40, which has the advantage of easy installation.

[0045] During implementation, the bottom outer edge of the knob switch 400 and the bottom outer edge of the positioning cap 43 are respectively provided with an annular inclined surface 431 that can reflect light, corresponding to the position above the annular light-transmitting portion 21. The annular inclined surface 431 is an electroplated mirror surface, which is used to reflect the light transmitted from the annular light-transmitting portion 21 to make the light brighter and more uniform.

[0046] Furthermore, in response to the use environment of the stove, the present invention is provided with a rubber pad 44 between the inner periphery of the sleeve 42 of the base 40 and the rotating shaft 200 of the stove. The rubber pad 44 can prevent moisture and oil from penetrating.

[0047] As previously mentioned, the light-emitting display module 100 can detect voltage changes between the minimum and maximum flames of the stove through the electronic control system or thermocouple, allowing the LEDs to flash in different patterns depending on the flame size to enhance identification. For example, when the rotary switch is in the low flame position, the multiple LEDs can flash in a blue cycle of dim, medium, and dim. When the rotary switch is in the high flame position, the multiple LEDs can flash in a blue cycle of dim, bright, and dim. If the rotary switch fails to ignite, the multiple LEDs can flash in red. If the stove suddenly shuts down, the multiple LEDs can flash in a red cycle of dim, medium, and dim.

[0048] The above description of the embodiments and the accompanying drawings are merely examples of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any examples that are similar or identical to the purpose, structure, device, feature, etc. of the present invention should fall within the patent scope of the present invention.

Claims

1. A light-emitting display module for a rotary switch, the light-emitting display module being disposed around a rotary shaft of the rotary switch and comprising a generally annular light guide plate and a light shielding sheet shielding the light guide plate, characterized in that: The light shielding sheet has an annular light-transmitting portion, and three arc-shaped recessed portions concave toward the center are provided on the outer periphery of the light guide plate. The three arc-shaped recessed portions are arranged at 360 degrees in equal parts, and an LED is provided on the outer side of each arc-shaped recess, irradiating toward the corresponding arc-shaped recess. This allows the light from each LED to be evenly scattered within the light guide plate through the concave lens of the corresponding arc-shaped recess, and then pass through the annular light-transmitting portion of the light shielding sheet to transmit light around the knob switch.

2. The light-emitting display module of the knob switch according to claim 1, characterized in that: A second arc recess capable of dispersing light is provided between the outer periphery and the inner periphery of the light guide plate at a position relative to each arc recess. The second arc recess and the corresponding arc recess together form a concave lens to disperse light.

3. The light-emitting display module of the knob switch according to claim 1, characterized in that: The light guide plate is provided with a plurality of closely distributed focusing holes between every two arc-shaped recesses. Each focusing hole can focus the light passing through, so that the light guide plate emits light uniformly through the plurality of focusing holes between every two arc-shaped recesses.

4. The light-emitting display module of the knob switch according to any one of claims 1 to 3, characterized in that: The plurality of LEDs are arranged on a hook-shaped circuit board, which is arranged at the bottom of the light guide plate so that three LEDs are fixed at positions relative to the three arc-shaped recesses and the three LEDs are electrically connected to each other.

5. The light-emitting display module of the knob switch according to claim 4, characterized in that: The rotary switch is a stove power control knob. The circuit board is provided with a connector that is electrically connected to an electronic control system of the stove rotary switch or a thermocouple of the stove, so that each LED can emit light with different brightness and / or flashing mode relative to the rotational position of the rotary switch or the voltage change signal of the stove thermocouple.

6. The light-emitting display module of the knob switch according to claim 5, characterized in that: The shading sheet has the same outer contour shape as the light guide plate, and is stacked and fixed on a base; the top surface of the base is provided with a positioning groove for accommodating the circuit board and the light guide plate, and a sleeve is protruding upward from the center of the positioning groove for the knob switch shaft to pass through, and the shading sheet and the center of the light guide plate are respectively inserted into the outer periphery of the sleeve.

7. The light-emitting display module of the knob switch according to claim 6, characterized in that: The cooker has a light-transmitting panel with a through hole for the sleeve to pass through, and the light-shielding sheet is arranged on the bottom surface of the light-transmitting panel so that the annular light-transmitting portion of the light-shielding sheet is located around the through hole of the light-transmitting panel.

8. The light-emitting display module of the knob switch according to claim 6, characterized in that: The outer periphery of the sleeve of the base is provided with external threads for a positioning cap with internal threads to be screwed on the outer periphery of the sleeve, so that the bottom of the positioning cap can press the light shielding sheet, light guide plate and circuit board down and position them on the base.

9. The light-emitting display module of the knob switch according to claim 8, characterized in that: The bottom outer edge of the knob switch and the bottom outer edge of the positioning cap are respectively provided with an annular inclined surface capable of reflecting light.

10. The light-emitting display module of the knob switch according to claim 6, characterized in that: A rubber pad capable of preventing moisture and oil from penetrating is arranged between the inner periphery of the sleeve of the base and the rotating shaft.

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