Light guide key assembly and electronic product
By designing the light guide main part and the light shielding part in the light guide key assembly, the light chain phenomenon caused by multiple light sources of indicator light is solved, and a more uniform light distribution and better visual effect is achieved.
Patent Information
- Application Number
- CN202421876593.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-02
AI Technical Summary
In the prior art, when multiple sources of indicator lights are set, there is a phenomenon of light series, resulting in poor light uniformity displayed in segmented indicator lights, affecting the visual effect.
A light guide key assembly is designed, including a circuit board, a light guide press and a light shielding part. A switch and a plurality of lamp sources are provided on the circuit board. The light guide press includes a light guide main body and a light transmitting pressing portion. The light guide main body includes a plurality of light guide portions arranged at intervals. The light input surface of each light guide portion corresponds one by one to the corresponding lamp sources. The light shielding portion blocks light leakage between adjacent lamp sources through a plurality of light shielding arms.
Through this design, it is ensured that the light emitted by each lamp source enters the corresponding light guide part directly and accurately, and the light emitted from the light-out surface is relatively uniform, avoiding the phenomenon of light string, improving the light uniformity of the light-emitting area of each section of the light-transmitting pressing part, and improving the visual effect.
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Figure CN222995285U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of electronic products, and particularly to a light guide button assembly and an electronic product. Background Art
[0002] In order to enable the buttons and indicator lights of intelligent electronic products to achieve human-computer interaction and improve the user experience, designers will integrate the buttons and indicator lights. In related technologies, when multiple light sources of the indicator light are set, although segmented light transmission of the indicator light can be achieved, due to the light leakage phenomenon between multiple light sources, the uniformity of the light displayed in segments by the indicator light is poor, affecting the visual effect. Summary of the Utility Model
[0003] An embodiment of this application provides a light guide button assembly and an electronic product, which solve the technical problem that in related technologies, when multiple light sources of the indicator light are set, although segmented light transmission of the indicator light can be achieved, due to the light leakage phenomenon between multiple light sources, the uniformity of the light displayed in segments by the indicator light is poor, affecting the visual effect.
[0004] To achieve the above object, according to the first aspect of this application, a light guide button assembly is provided for installation on a housing. The light guide button assembly includes:
[0005] A circuit board, on one side facing the through hole of the housing, is provided with a switch member and multiple light sources. The switch member and the multiple light sources are spaced apart, and the multiple light sources are spaced apart;
[0006] A light guide pressing member, arranged on one side of the circuit board facing the through hole of the housing and capable of triggering the switch member. The light guide pressing member includes a light guide main body portion and a light-transmitting pressing portion connected to each other. The light-transmitting pressing portion is used to pass through the through hole. The light guide main body portion is arranged between the light-transmitting pressing portion and the circuit board. The light guide main body portion includes multiple spaced-apart light guide portions. The incident light surfaces of the multiple light guide portions are arranged in one-to-one correspondence with the multiple light sources. The outgoing light surface of each light guide portion is arranged opposite to the light-transmitting pressing portion;
[0007] A light-shielding portion, including multiple light-shielding arms. Each light-shielding arm abuts between the circuit board and the light guide main body portion. One light-shielding arm is provided between any two adjacent light sources.
[0008] Optionally, the light-shielding portion further includes a connecting arm, which abuts between the circuit board and the light guide main body portion and is connected to one ends of the multiple light-shielding arms.
[0009] Optionally, the light-transmitting pressing portion comprises a pressing portion, a first elastic arm, and a second elastic arm, the pressing portion is used to be inserted into the insertion hole, the pressing portion is extended along a first direction, and the pressing portion is connected to the first elastic arm and the second elastic arm at both sides along a second direction, and the second direction is perpendicular to the first direction;
[0010] The light source and the switch element are spaced apart along the second direction, the pressing portion is staggered from the switch element on the orthographic projection of the circuit board, and the switch element is arranged opposite to the first elastic arm and can be triggered by the first elastic arm;
[0011] The first elastic arm and the second elastic arm abut against the light guide body, the pressing portion is spaced apart from the light guide body, and along the first direction, the length of the first elastic arm is greater than the length of the second elastic arm.
[0012] Optionally, along the first direction, the length of the first elastic arm is less than the length of the pressing portion, the length of the second elastic arm is greater than or equal to the length of the pressing portion, and along the second direction, the center line of the first elastic arm, the center line of the second elastic arm and the center line of the pressing portion are collinearly arranged; and / or,
[0013] The elasticity of the first elastic arm is greater than the elasticity of the second elastic arm.
[0014] Optionally, the light guide body has a reset elastic arm between the first elastic arm and the switch element, and the reset elastic arm is in contact with the first elastic arm and the switch element respectively.
[0015] Optionally, along the second direction, the length of the resetting elastic arm is L1, wherein 0.7 mm ≤ L1 ≤ 1.2 mm; and / or,
[0016] Along the direction from the first elastic arm to the reset elastic arm, the thickness of the reset elastic arm is H, wherein 0.2 mm≤H≤0.3 mm.
[0017] Optionally, a groove is provided on a side of the reset elastic arm facing the first elastic arm, and the groove is provided corresponding to the switch element;
[0018] A first boss is protruding from one side of the first elastic arm facing the reset elastic arm, and the first boss is installed in the groove.
[0019] Optionally, a second boss is protruding from a side of the resetting elastic arm disposed toward the circuit board, and the second boss is disposed corresponding to the switch component to abut against the switch component.
[0020] Optionally, along the direction in which the switch member is spaced from the plurality of light sources, the distance from the orthographic projection of the light source on the circuit board to the center of the orthographic projection of the pressing portion on the circuit board is D1, where 1 mm ≤ D1 ≤ 2 mm; and / or,
[0021] Along the direction in which the switch member is spaced from the plurality of light sources, the distance from the orthographic projection of the switch member on the circuit board to the center of the orthographic projection of the pressing portion on the circuit board is D2, where D2 > 2 mm.
[0022] According to a second aspect of the present application, there is provided an electronic product, including:
[0023] A housing provided with a through hole;
[0024] The light guide button assembly as described above, and the light guide button assembly is installed on the housing.
[0025] Optionally, the housing includes a mounting seat disposed opposite to the through hole, the mounting seat is for mounting the circuit board, and a support portion is provided on a side of the mounting seat facing the through hole;
[0026] The light guide pressing member has a trigger arm and a support arm oppositely disposed along the direction in which the switch member is spaced from the plurality of light sources, the elasticity of the trigger arm is greater than that of the support arm, the trigger arm is disposed corresponding to the switch member and can trigger the switch member, and the support arm abuts against the support portion.
[0027] Optionally, the support portion includes a plurality of abutting platforms, and the plurality of abutting platforms are spaced apart along the direction in which the plurality of light sources are spaced apart.
[0028] In the light guide button assembly of the embodiment of the present application, when the switch member is triggered by the light guide pressing member, multiple light sources on the circuit board are lit. Since the light guide main body portion includes multiple light guide portions arranged at intervals, and the light incident surface of each light guide portion is arranged in one-to-one correspondence with the corresponding light source. This design ensures that the light emitted by each light source can directly and accurately enter the corresponding light guide portion, making the light emitted from the light exit surface relatively uniform. The light shielding portion includes multiple light shielding arms, and each light shielding arm abuts between the circuit board and the light guide main body portion, especially arranged between any two adjacent light sources. This design effectively blocks the light leakage between adjacent light sources, ensuring that when a certain light source is lit, its light will not interfere with or enter the adjacent light guide portion. Since the light incident surface of each light guide portion has an accurate corresponding relationship with the corresponding light source, and the presence of the light shielding arm further strengthens this corresponding relationship, the light of each light source will only be conducted to the corresponding light guide portion and will not affect other light guide portions. This ensures that multiple light sources can be lit segment by segment without light crosstalk between them, thereby realizing segmental light transmission of the light-transmitting pressing portion, improving the uniformity of the light in the lit areas of each segment of the light-transmitting pressing portion, and improving the visual effect.
[0029] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0031] In order to more fully understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.
[0032] Figure 1 is a schematic structural diagram of an electronic product provided in an exemplary embodiment of the present disclosure;
[0033] Figure 2 is Figure 1 an exploded schematic diagram of the electronic product shown;
[0034] Figure 3 is Figure 1 a cross-sectional schematic diagram taken at Y-Y of the electronic product shown;
[0035] Figure 4 is Figure 1 a cross-sectional schematic diagram taken at X-X of the electronic product shown;
[0036] Figure 5It is a schematic structural diagram of the light-transmitting pressing part provided in an exemplary embodiment of the present disclosure;
[0037] Figure 6 is Figure 5 a bottom view schematic diagram of the shown light-transmitting pressing part;
[0038] Figure 7 is Figure 5 a left view schematic diagram of the shown light-transmitting pressing part;
[0039] Figure 8 It is a schematic structural diagram of the light guide main body part provided in an exemplary embodiment of the present disclosure;
[0040] Figure 9 is Figure 8 a bottom view schematic diagram of the shown light guide main body part.
[0041] Explanation of reference numerals:
[0042] 100, electronic product;
[0043] 11, circuit board, 12, switch component, 13, light source, 141, light guide main body part, 1411, light guide part, 1412, reset elastic arm, 14121, groove, 14122, second boss, 142, light-transmitting pressing part, 1421, pressing part, 1422, first elastic arm, 14221, first boss, 1423, second elastic arm, 143, trigger arm, 144, support arm, 15, light-shielding part, 151, light-shielding arm, 152, connecting arm, 171, third positioning part, 172, third mating part, 18, third connecting piece;
[0044] 20, housing, 21, through hole, 22, mounting seat, 221, support part, 2211, abutting platform, 23, cover body;
[0045] 31, first positioning part, 32, first mating part 32;
[0046] 41, first connecting piece, 42, second connecting piece;
[0047] 51, second positioning part, 52, second mating part. Detailed implementation manners
[0048] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.
[0049] The present application provides an electronic product 100. Please refer toFigures 1 to 3 , Figure 1 is a schematic structural view of an electronic product provided in an exemplary embodiment of the present disclosure, Figure 2 and Figure 1 is an exploded view of the electronic product shown, Figure 3 and Figure 1 is a sectional view taken along the line Y - Y shown. The electronic product 100 includes a housing 20 and a light - guiding button assembly. The housing 20 is provided with a through - hole 21, and the light - guiding button assembly is installed in the housing 20.
[0050] Referring to Figure 2 and Figure 3 , the light - guiding button assembly provided in the present application includes a circuit board 11, a light - guiding pressing member, and a light - shielding portion 15.
[0051] On one side of the circuit board 11 facing the through - hole 21 of the housing 20, a switch member 12 and a plurality of light sources 13 are provided. The switch member 12 and the plurality of light sources 13 are arranged at intervals, and the plurality of light sources 13 are arranged at intervals.
[0052] It should be noted that in the embodiments of the present application, the switch member 12 and the plurality of light sources 13 are soldered to the circuit board 11 by SMT. In this way, the SMT technology allows the switch member 12 and the plurality of light sources 13 to be tightly soldered on the surface of the circuit board 11, which helps to achieve high - density assembly of the light - guiding button assembly. By reducing the space between the switch member 12 and the plurality of light sources 13, the light - guiding button assembly is small and light in volume. Of course, in other embodiments, the switch member 12 and the plurality of light sources 13 can also be directly soldered to the circuit board 11. Specifically, the present application does not limit this.
[0053] The light - guiding pressing member is arranged on one side of the circuit board 11 facing the through - hole 21 of the housing 20 and can trigger the switch member 12. In this way, when the user presses the light - guiding pressing member through the through - hole 21, the switch member 12 can be quickly and accurately triggered, thereby realizing rapid control of the plurality of light sources 13. Integrating the light - guiding pressing member and the switch member 12 on the same side simplifies the assembly process. During manufacturing, the installation of components on this side can be completed at one time, improving production efficiency. In addition, the light - guiding pressing member not only has the function of triggering the switch, but also can provide visual feedback through its light - guiding characteristics, such as indicating the device status or operation result, which not only facilitates user operation but also enhances the overall aesthetic feeling of the device.
[0054] The light - guiding pressing member includes a light - guiding main body portion 141 and a light - transmitting pressing portion 142 connected to each other. In this way, the light - guiding pressing member has a compact structure and saves installation space.
[0055] It should be noted that the light guide main body 141 and the light-transmitting pressing part 142 are connected by a third connecting member 18. There are various types of the third connecting member 18. For example, in some embodiments, the third connecting member 18 includes double-sided tape. In some other embodiments, the third connecting member 18 may further include a snap structure or a threaded structure. Specifically, the present application does not limit the type of the third connecting member 18. In addition, since the connection methods of the snap structure and the threaded structure are already mature, they will not be elaborated herein one by one.
[0056] The light-transmitting pressing part 142 is used to pass through the through hole 21, so that the user can directly press the light-transmitting pressing part 142 from the outside of the housing 20, thereby realizing the triggering of the switch member 12, and the operation is simple. The light guide main body 141 is arranged between the light-transmitting pressing part 142 and the circuit board 11. In this way, the light guide main body 141 can conduct the light emitted by the light source 13 on the circuit board 11 to the light-transmitting pressing part 142. The light guide main body 141 includes a plurality of spaced-apart light guide parts 1411. The light incident surfaces of the plurality of light guide parts 1411 are arranged in one-to-one correspondence with the plurality of light sources 13. This design ensures that the light emitted by the light source 13 can be efficiently guided and transmitted by the corresponding light incident surfaces, reducing the loss and confusion of light, thereby optimizing the overall light effect. The light emitting surface of each light guide part 1411 is arranged opposite to the light-transmitting pressing part 142. In this way, it is ensured that the light emitted by each light source 13 can be effectively received by the corresponding light incident surface. The light emitting surface is arranged opposite to the light-transmitting pressing part 142, so that the received light can be evenly conducted to the light-transmitting pressing part 142, and the light effect transmitted by the light-transmitting pressing part 142 is arranged at intervals, thereby providing a clear visual feedback for the user.
[0057] It should be noted that the material of the light-transmitting pressing part 142 is made of a material that can conduct light, such as plastic optical fiber material, which includes polymethyl methacrylate (PMMA), polystyrene (PS), and polycarbonate (PC). It can also be injection-molded with a semi-transparent PC material alone, or can be injection-molded in two colors with a semi-transparent PC and a black PC material or other assembly processes. Specifically, the present application does not limit this.
[0058] There are various ways to implement that the light guide main body 141 includes a plurality of spaced-apart light guide parts 1411. For example, in some embodiments, the light guide main body is injection-molded in two colors. The light guide main body is first injection-molded with a transparent PC material to form the light guide parts 1411, and then secondary injection molding, that is, "two-shot", is carried out in the same mold, and a black TPU material is used to form other parts of the light guide main body. The light guide parts 1411 made of the transparent PC material ensure the efficient transmission of light, so that the light emitted from the light source 13 can be clearly transmitted to the light-transmitting pressing part 142, providing a bright visual indication for the user. The black TPU material serves as the background, enhancing the contrast of the light, making the light-transmitting part more prominent.
[0059] In addition, a light-homogenizing film and a diffusion film may be used in the related art to ensure uniform distribution of light. However, in the application, since the light-guiding main body 141 includes a plurality of light-guiding parts 1411 arranged at intervals, and the light-incident surface of each light-guiding part 1411 corresponds one-to-one with the light source 13, this design itself is more conducive to uniform distribution of light. Therefore, the arrangement of the light-homogenizing film and the diffusion film can be reduced, because the omission of the light-homogenizing film and the diffusion film not only simplifies the structure of the light-guiding key assembly, but also directly reduces the number of required parts. Fewer parts means a simpler assembly process, thereby improving production efficiency and reducing the risk of assembly errors. Reducing the use of parts such as light-homogenizing films and diffusion films directly reduces material costs.
[0060] In order to increase the uniformity of light, appropriate diffusion powder can be added to the material of the light guide body, so that the light emitted from the light emitting surface of the light guide body becomes more uniform, avoiding bright and dark areas. The uniform light distribution can enhance the visual effect of the light emitted by the light-transmitting pressing part 142.
[0061] Reference Figure 2 The light shielding part 15 includes a plurality of light shielding arms 151, each light shielding arm 151 abuts between the circuit board 11 and the light guide body 141, and a light shielding arm 151 is provided between any two adjacent light sources 13, so that when the light source 13 emits light, the light will scatter in all directions. Without the blocking of the light shielding arm 151, the light of one light source 13 may leak to the adjacent light guide part 1411, causing light confusion and affecting the display effect. The light shielding arm 151 acts like a barrier to block such unnecessary light leakage. It ensures that each light guide part 1411 only receives light from the corresponding light source 13, thereby improving the clarity and accuracy of the display. Since mutual interference of light is prevented, each light guide part 1411 can accurately display the state of the corresponding light source 13, and can be presented more accurately in terms of brightness, color and dynamic effects. The clear display effect can enhance the user experience and reduce the possibility of misoperation.
[0062] It should be noted that there are various materials for making the light-shielding part 15. For example, in some embodiments, the material for making the light-shielding part 15 may include light-shielding foam. In this case, the light-shielding foam usually has a black or dark coating, which can effectively block the penetration of light, thus achieving an excellent light-shielding effect. The light-shielding foam usually has good durability and can maintain a good light-shielding effect for a long time. At the same time, it is also relatively easy to clean and maintain, and can be cleaned or replaced when needed. Of course, in other embodiments, the material for making the light-shielding part 15 may also include a light-shielding plate. The light-shielding plate is a hard material, such as metal or plastic, with a light-shielding material coated on its surface or designed to be black to absorb light. It can be placed between two adjacent light sources 13 to play a role of physical separation and prevent the direct propagation of light.
[0063] In the light guide button assembly of the embodiment of the present application, when the switch member 12 is triggered by the light guide pressing member, a plurality of light sources 13 on the circuit board 11 are lit. Since the light guide main body portion 141 includes a plurality of spaced light guide portions 1411, and the light incident surface of each light guide portion 1411 is arranged in one-to-one correspondence with the corresponding light source 13. This design ensures that the light emitted by each light source 13 can directly and accurately enter the corresponding light guide portion 1411, making the light emitted from the light exit surface relatively uniform. The light-shielding part 15 includes a plurality of light-shielding arms 151, and each light-shielding arm 151 abuts between the circuit board 11 and the light guide main body portion 141, especially between any two adjacent light sources 13. This design effectively blocks the light leakage between adjacent light sources 13, ensuring that when a certain light source 13 is lit, its light will not interfere with or enter the adjacent light guide portion 1411. Since the light incident surface of each light guide portion 1411 has an accurate correspondence with the corresponding light source 13, and the presence of the light-shielding arm 151 further strengthens this correspondence, the light of each light source 13 will only be conducted to the corresponding light guide portion 1411 and will not affect other light guide portions 1411. This ensures that a plurality of light sources 13 can be lit segment by segment, and there will be no light crosstalk between them, thereby realizing segmental light transmission of the light-transmitting pressing portion 142 and improving the uniformity of the light in the lit areas of each segment of the light-transmitting pressing portion 142, and improving the visual effect.
[0064] Refer to Figure 2 、 Figure 5 and Figure 6 , Figure 5 is a schematic structural diagram of the light-transmitting pressing portion provided in an exemplary embodiment of the present disclosure, Figure 6 is Figure 5An upward view schematic diagram of the light-transmitting pressing part shown. In some embodiments, a third positioning structure is further provided between the light-transmitting pressing part 142 and the light guide main body part 141. The third positioning structure includes a third positioning part 171 and a third matching part 172 adapted to the third positioning part 171. One of the third positioning part 171 and the third matching part 172 is provided on the light-transmitting pressing part 142, and the other is provided on the light guide main body part 141.
[0065] In some embodiments, the light-shielding part 15 further includes a connecting arm 152. The connecting arm 152 abuts between the circuit board 11 and the light guide main body part 141 and is connected to one ends of a plurality of light-shielding arms 151. The design of the connecting arm 152 increases the overall structural stability of the light-shielding part 15. Since the connecting arm 152 is connected to a plurality of light-shielding arms 151, this reduces the need to separately install a plurality of light-shielding arms 151, thereby improving the production efficiency. The connection between the connecting arm 152 and the light-shielding arms 151 can ensure that all parts of the light-shielding part 15 are closely fitted, thereby enhancing the light-shielding effect. This helps to prevent light leakage or unnecessary light interference and improves the optical performance of the electronic product.
[0066] Continue to refer to Figure 2 、 Figure 5 and Figure 6 In some embodiments, the light-transmitting pressing part 142 includes a pressing part 1421, a first elastic arm 1422, and a second elastic arm 1423. The pressing part 1421 is used to pass through the through hole 21. The pressing part 1421 extends along a first direction. The first elastic arm 1422 and the second elastic arm 1423 are respectively connected to both sides of the pressing part 1421 along a second direction, and the second direction is perpendicular to the first direction.
[0067] It should be noted that there are various ways to connect the first elastic arm 1422 and the second elastic arm 1423 to the pressing part 1421. For example, in some embodiments, the first elastic arm 1422 and the second elastic arm 1423 can be integrally formed with the pressing part 1421. The integrally formed design simplifies the production process and improves the production efficiency of the light-transmitting pressing part 142. Since the first elastic arm 1422, the second elastic arm 1423, and the pressing part 1421 are integrally formed, their connection is more firm, without additional connection points or seams, thereby improving the overall structural strength and stability of the light-transmitting pressing part 142. In other embodiments, the first elastic arm 1422 and the second elastic arm 1423 can also be fixed by welding or glued with glue, etc. Specifically, the present application does not limit this.
[0068] Refer to Figure 3, the light source 13 and the switch member 12 are arranged at intervals along the second direction. In this way, it helps to reasonably utilize the space on the circuit board 11 and avoid mutual interference between the light source 13 and the switch member 12. This layout not only ensures sufficient heat dissipation space between the light source 13 and the switch member 12 but also reduces the potential circuit problems caused by the light source 13 and the switch member 12 being too close. The orthographic projection of the pressing part 1421 on the circuit board 11 is offset from the switch member 12. In this way, it means that the pressing part 1421 is not directly above the switch member 12, thus avoiding the possible blockage of the light conduction around the switch member 12 during the pressing process. This design ensures that the light can be evenly conducted from the light source 13 to the light guide part 1411 and then evenly emitted through the light-transmitting pressing part 142 to form a uniform light guide effect.
[0069] Continue to refer to Figure 3 , the switch member 12 is arranged opposite to the first elastic arm 1422 and can be triggered by the first elastic arm 1422. In this way, the first elastic arm 1422 not only provides the elasticity of the structure as part of the light-transmitting pressing part 142 but also undertakes the function of triggering the switch member 12. This design perfectly integrates the structure and function, making the whole component more compact and efficient. Since the switch member 12 is arranged opposite to the first elastic arm 1422, when the user presses the light-transmitting pressing part 142, the first elastic arm 1422 will deform and precisely trigger the switch member 12. This design ensures the accuracy and reliability of the triggering mechanism and avoids problems such as mis-triggering or insensitive triggering. The first elastic arm 1422 and the second elastic arm 1423 jointly provide stable mechanical support for the light-transmitting pressing part 142. When the user applies force, the first elastic arm 1422 mainly undertakes the task of triggering the switch member 12, while the second elastic arm 1423 plays the role of auxiliary support and balance force to ensure the stability and durability of the whole light-transmitting pressing part 142. Due to the elastic characteristics of the first elastic arm 1422, the user will feel a certain buffer and feedback force when pressing, making the operation more comfortable.
[0070] Refer to again Figure 3 , the first elastic arm 1422 and the second elastic arm 1423 abut against the light guide main body part 141. In this way, the direct contact between the first elastic arm 1422 and the second elastic arm 1423 and the light guide main body part 141 ensures the efficient transmission of force. When the user presses the light-transmitting pressing part 142, the force is quickly and accurately transmitted to the light guide main body part 141 through the first elastic arm and the second elastic arm, and then the light guide main body quickly responds and precisely triggers the switch member 12. The abutting design reduces the energy loss during the force transmission. Since there are no additional connecting parts or gaps, the force can act more directly on the light guide main body part 141, improving the energy utilization efficiency. The abutting design makes the whole structure more compact and optimizes the space utilization.
[0071] Refer toFigure 3 , Figures 4 to 6 , Figure 4 yes Figure 1 Schematic cross-sectional view at XX shown. The pressing portion 1421 is spaced apart from the light-guiding body portion 141, and along the first direction, the length of the first elastic arm 1422 is greater than the length of the second elastic arm 1423, so that the first elastic arm 1422 and the second elastic arm 1423 can form a three-point support structure with the light-guiding body portion 141. In physics, three points determine a plane, and this structure can provide very stable support and effectively prevent the light-transmitting pressing portion 142 from shaking during use. When the user applies pressure to the pressing portion 1421, this force will be transmitted to the light-guiding body portion 141 through the first elastic arm 1422 and the second elastic arm 1423. Since the lengths of the first elastic arm 1422 and the second elastic arm 1423 are different, they will bear different proportions of force, thereby achieving uniform distribution of force. This design helps to prevent stress concentration and improves the durability of the light-transmitting pressing portion 142. Along the first direction, the length of the first elastic arm 1422 is greater than that of the second elastic arm 1423 , which means that under the same external force, the first elastic arm 1422 will produce a greater deformation, thereby quickly triggering the switch element 12 .
[0072] Reference Figure 5 and Figure 6 In some embodiments, along the first direction, the length of the first elastic arm 1422 is less than the length of the pressing portion 1421, the length of the second elastic arm 1423 is greater than or equal to the length of the pressing portion 1421, and along the second direction, the center line of the first elastic arm 1422, the center line of the second elastic arm 1423 and the center line of the pressing portion 1421 are collinearly arranged. In this way, the collinear arrangement ensures the symmetry of the entire structure of the light-transmitting pressing portion 142, which is not only more beautiful visually, but also helps to ensure the balanced distribution of mechanical properties. When the center lines are collinear, the first elastic arm 1422, the second elastic arm 1423 and the pressing portion 1421 can distribute the force more evenly when subjected to force, avoiding stress concentration or unbalanced force caused by structural deviation, thereby improving the mechanical properties and durability of the overall structure of the light-transmitting pressing portion 142. The design of the collinear center line simplifies the positioning requirements during the manufacturing and assembly process. In addition, this helps to reduce manufacturing errors and improve production efficiency. When the user presses the pressing portion 1421 , the movements of the pressing portion 1421 , the first elastic arm 1422 , and the second elastic arm 1423 will be more consistent and predictable due to the collinearity of the center lines, which helps to improve the consistency and accuracy of the user's operation.
[0073] In some embodiments, the elasticity of the first elastic arm 1422 is greater than that of the second elastic arm 1423. Thus, due to the greater elasticity of the first elastic arm 1422, it can more effectively absorb and disperse the pressure from the pressing portion 1421. In the case where the switch needs to be triggered, the high elasticity of the first elastic arm 1422 can ensure a more sensitive triggering response. When the user applies pressure, the first elastic arm 1422 can reach the deformation required to trigger the switch faster, thereby improving the response speed of the operation. The high elasticity of the first elastic arm 1422 can provide the user with a more comfortable pressing experience. It can provide more buffering when the user presses, reducing the discomfort of the finger and providing more natural feedback at the same time. Although the first elastic arm 1422 has high elasticity, the presence of the second elastic arm 1423 provides additional support and stability. This double-arm design ensures the stability and reliability of the light-transmitting pressing portion 142 when it is stressed.
[0074] Refer to Figure 3 and Figure 9 , Figure 9 is Figure 8 The bottom view schematic diagram of the light guide main body shown. In some embodiments, the light guide main body 141 has a reset elastic arm 1412 between the first elastic arm 1422 and the switch member 12. The reset elastic arm 1412 is in contact with the first elastic arm 1422 and the switch member 12 respectively. Thus, the design of the reset elastic arm 1412 increases the overall stability of the structure. It is in contact with the first elastic arm 1422 and the switch member 12 to form a firm connection. When the user applies pressure through the pressing portion 1421, it is convenient for the first elastic arm 1422 to deform and transfer the acting force to the reset elastic arm 1412. The reset elastic arm 1412 can better transfer the force to the switch member 12 to ensure that the switch member 12 is triggered accurately and quickly. The reset elastic arm 1412 ensures that after the pressing operation is completed, the first elastic arm 1422 and the switch member 12 can return to their original positions. This automatic reset function improves the reliability and durability of the light guide pressing member, and also makes the continuous triggering operation smoother. The contact between the reset elastic arm 1412 and the switch member 12 helps to improve the triggering effect.
[0075] In some embodiments, along the second direction, the length of the reset elastic arm 1412 is L1, where 0.7 mm ≤ L1 ≤ 1.2 mm. In this way, the length of the reset elastic arm 1412 is between 0.7 mm and 1.2 mm. This range is carefully designed to ensure that the reset elastic arm 1412 provides an appropriate reset force. An elastic arm that is too short may provide insufficient reset force, while an elastic arm that is too long may result in an excessive reset force, affecting the user experience and the durability of the reset elastic arm 1412. In the design of miniaturized and compact electronic devices, space utilization is crucial. Controlling the length of the reset elastic arm 1412 between 0.7 mm and 1.2 mm helps to achieve an optimal functional layout within a limited space while avoiding unnecessary space waste. The length of the reset elastic arm 1412 between 0.7 mm and 1.2 mm can reduce the risk of stress concentration and fatigue damage, thereby extending the service life of the reset elastic arm 1412. The length of the reset elastic arm 1412 between 0.7 mm and 1.2 mm can provide a moderate reset force, thereby providing a comfortable pressing feedback for the user, ensuring accurate reset after each press, and enhancing the user experience.
[0076] In some embodiments, along the direction from the first elastic arm 1422 to the reset elastic arm 1412, the thickness of the reset elastic arm 1412 is H, where 0.2 mm ≤ H ≤ 0.3 mm. In this way, controlling the thickness of the reset elastic arm 1412 between 0.2 mm and 0.3 mm can ensure that the reset elastic arm 1412 has sufficient strength to withstand the pressure and impact during daily use, while maintaining good elasticity to achieve an effective reset function. The thickness of the reset elastic arm 1412 directly affects its deformation ability. Within this thickness range, the elastic arm can produce appropriate deformation when subjected to pressure, thereby triggering the switch and then returning to its original state. This design ensures the accuracy and responsiveness of the triggering of the switch member 12. By precisely controlling the thickness of the reset elastic arm 1412 between 0.2 mm and 0.3 mm, it is possible to minimize space occupancy while maintaining the reset functionality, providing more layout space for other components. Controlling the thickness of the reset elastic arm 1412 between 0.2 mm and 0.3 mm in the design enables the reset elastic arm 1412 to provide an appropriate feedback force to the user when pressed, neither being too hard to cause discomfort to the user's touch nor being too soft to affect the accuracy of the operation. This design helps to improve the comfort and satisfaction of the user's operation.
[0077] Refer to Figure 3 、 Figure 7 and Figure 8 , Figure 7 is Figure 5 the left view of the light-transmitting pressing part shown, Figure 8It is a schematic structural diagram of a light guide main body provided in an exemplary embodiment of the present disclosure. In some embodiments, a groove 14121 is provided on the side of the reset elastic arm 1412 facing the first elastic arm 1422. The groove 14121 corresponds to the switch member 12. A first boss 14221 protrudes from the side of the first elastic arm 1422 facing the reset elastic arm 1412. The first boss 14221 is installed in the groove 14121. In this way, through the cooperation of the groove 14121 and the first boss 14221, the connection between the reset elastic arm 1412 and the first elastic arm 1422 is tighter and more stable. This design enhances the overall stability of the structure and reduces the possible shaking or misalignment during use. The design of the groove 14121 and the first boss 14221 ensures the precise alignment between the reset elastic arm 1412 and the first elastic arm 1422. This positioning accuracy is crucial for ensuring that the switch member 12 can be accurately triggered and also improves the reliability of the overall structure. The cooperation of the groove 14121 and the boss makes the assembly process simpler and more intuitive. The first boss 14221 can be easily installed into the groove 14121, thereby reducing the assembly time and cost and improving the production efficiency. By providing the groove 14121, it can be ensured that the switch member 12 is triggered only when sufficient pressure is applied to completely embed the first boss 14221 into the groove 14121. This helps to prevent accidental triggering caused by misoperation or slight touch. The precise positioning of the first boss 14221 and the groove 14121 makes the user's operation smoother and more accurate, enhancing the user experience.
[0078] Referring to Figure 3 and Figure 9 , in some embodiments, a second boss 14122 protrudes from the side of the reset elastic arm 1412 facing the circuit board 11. The second boss 14122 corresponds to the switch member 12 and is used to abut against the switch member 12. In this way, the design of the second boss 14122 enables the reset elastic arm 1412 to accurately trigger the switch member 12 when pressed. The direct abutment of the second boss 14122 against the switch member 12 ensures the accuracy and consistency of the triggering action, thereby improving the reliability of the light guide button assembly. Since the second boss 14122 is directly provided corresponding to the switch member 12, when pressed, the second boss 14122 can quickly transfer the force to the switch member 12, reducing the loss during the energy transfer process and improving the triggering efficiency.
[0079] In some embodiments, along the direction in which the switch member 12 is spaced apart from the plurality of light sources 13, the distance from the orthographic projection of the light source 13 on the circuit board 11 to the center of the orthographic projection of the pressing portion 1421 on the circuit board 11 is D1, where 1 mm ≤ D1 ≤ 2 mm. In this way, keeping the distance between the light source 13 and the center of the pressing portion 1421 within the range of 1 mm to 2 mm helps to ensure that the light can evenly and effectively illuminate the pressing portion 1421. By precisely controlling the distance between the light source 13 and the pressing portion 1421, the light transmitted through the light-transmitting pressing portion 142 will not be too bright or too dark, thus providing a more comfortable visual experience for the user. Setting the light source 13 within the range of 1 mm to 2 mm helps to keep the overall structure of the light guide button assembly compact and avoid occupying too much space.
[0080] In some embodiments, along the direction in which the switch member 12 is spaced apart from the plurality of light sources 13, the distance from the orthographic projection of the switch member 12 on the circuit board 11 to the center of the orthographic projection of the pressing portion 1421 on the circuit board 11 is D2, where D2 > 2 mm. In this way, since a distance greater than 2 mm is maintained between the switch member 12 and the pressing portion 1421, this space can be effectively utilized to install the light-shielding portion 15. Such a design not only avoids interference between components but also provides sufficient operating space for the installation of the light-shielding portion 15, making the assembly process simpler and faster.
[0081] In some embodiments, the housing 20 includes a mounting seat 22 disposed opposite to the through-hole 21, and the mounting seat 22 is for mounting the circuit board 11. In this way, the mounting seat 22 provides a stable mounting platform for the circuit board 11. By fixing the circuit board 11 on the mounting seat 22, it can be ensured that the circuit board 11 will not shake or shift during use, thereby improving the stability of the performance of the electronic product 100. The mounting seat 22 can play a role in protecting the circuit board 11 and preventing the circuit board 11 from being physically impacted or damaged by the outside.
[0082] Refer to Figure 3 As shown in, the housing 20 further includes a cover body 23. The cover body 23 is provided with a through-hole 21. The cover body 23 and the mounting seat 22 are buckled together to jointly enclose an installation cavity. The circuit board 11, the light guide pressing member, and the light-shielding portion 15 are all installed in the installation cavity. In this way, the circuit board 11, the light guide pressing member, and the light-shielding portion 15 are protected, and damage to the circuit board 11, the light guide pressing member, and the light-shielding portion 15 caused by external factors such as dust, moisture, and dirt can be reduced, thereby improving the stability and reliability of the electronic product 100.
[0083] Refer to Figure 2, in some embodiments, a first positioning structure is further provided between the mounting base 22 and the circuit board 11. The first positioning structure includes a first positioning portion 31 and a first mating portion 32 adapted to the first positioning portion 31. One of the first positioning portion 31 and the first mating portion 32 is provided on the mounting base 22, and the other is provided on the circuit board 11. Thus, the design of the first positioning portion 31 and the first mating portion 32 ensures the precise positioning between the circuit board 11 and the mounting base 22. This positioning structure can quickly guide the circuit board 11 to be accurately mounted on the mounting base 22, avoiding deviations or misalignments during the mounting process. Due to the precise positioning structure, the assembler can complete the mounting of the circuit board 11 faster, reducing the time for adjustment and calibration, thereby improving the production efficiency. The tight combination of the first positioning portion 31 and the first mating portion 32 helps to enhance the connection stability between the circuit board 11 and the mounting base 22. This design reduces the risk of the circuit board 11 shifting or falling off due to vibration or impact during the use of the device. When it is necessary to repair or replace the circuit board 11, the first positioning structure can quickly and accurately guide the installation of the new circuit board 11, thus simplifying the repair and replacement process. Precise positioning and stable connection help to improve the overall quality of the electronic product 100. This design reduces the possibility of failures or performance degradation of the electronic product 100 caused by improper installation.
[0084] It should be noted that there are various types of the first positioning portion 31 and the first mating portion 32. For example, in some embodiments, the first positioning portion 31 and the first mating portion 32 may include a mating positioning protrusion and a positioning groove. In some other embodiments, the first positioning portion 31 and the first mating portion 32 may further include a positioning post and a positioning hole. The types of the first positioning portion 31 and the first mating portion 32 can be set according to needs, and the present application does not limit this.
[0085] Referring to Figure 2 and Figure 3, on one side of the mounting base 22 facing the through hole 21, there is a support portion 221. The light guide pressing member has a trigger arm 143 and a support arm 144 oppositely arranged along the direction in which the switch member 12 and the multiple light sources 13 are spaced apart. The elasticity of the trigger arm 143 is greater than that of the support arm 144. The trigger arm 143 is arranged corresponding to the switch member 12 and can trigger the switch member 12. The support arm 144 abuts against the support portion 221. In this way, the setting of the support portion 221 and the abutment of the support arm 144 against the support portion 221 provide a stable physical support point for the light guide pressing member. This design ensures that the light guide pressing member maintains a stable position when not being pressed, preventing unnecessary movement or shaking. Since the elasticity of the trigger arm 143 is greater than that of the support arm 144, when pressing the light guide pressing member, the support arm 144 is limited by the support portion 221, while the trigger arm 143 is more likely to deform. This design utilizes the principle similar to that of a seesaw, enabling the user to trigger the switch member 12 with a smaller force, improving the triggering efficiency and sensitivity.
[0086] Refer to Figure 2 , in some embodiments, the support portion 221 includes a plurality of abutting platforms 2211. The plurality of abutting platforms 2211 are spaced apart along the direction in which the multiple light sources 13 are spaced apart. In this way, by setting the plurality of abutting platforms 2211, the supporting force received by the light guide pressing member can be dispersed to multiple points instead of being concentrated at one point. This helps to reduce wear or damage caused by excessive force on a single point, thereby improving the durability of the light guide pressing member. The plurality of abutting platforms 2211 are spaced apart along the direction in which the light sources 13 are spaced apart, which can provide a wider supporting area, enabling the light guide pressing member to maintain a more stable state when being pressed. This design reduces the possible offset or tilt of the pressing member when being stressed, ensuring the accuracy and consistency of triggering.
[0087] Refer to Figure 3 , in some embodiments, the mounting base 22 and the circuit board 11 are fixed by a first connecting member 41. In this way, it can be ensured that the circuit board 11 will not move or fall off due to vibration, impact or other external forces during use. This firm connection helps to maintain the overall structural stability of the electronic product 100.
[0088] It should be noted that there are various types of the first connecting member 41. For example, in some embodiments, the first connecting member 41 may include double-sided tape, and the mounting base 22 and the circuit board 11 are fixed through the double-sided tape. In this way, the double-sided tape can very conveniently bond the circuit board 11 and the mounting base 22 together without using additional tools or complex fixing devices. This connection method simplifies the assembly steps and improves the production efficiency. The double-sided tape has a certain elasticity and shock-absorbing ability, and can absorb and buffer the impact of external vibration or shock on the circuit board 11 to a certain extent, protecting the circuit board 11 from damage. In other embodiments, the first connecting member 41 may also include a snap structure or a threaded structure, etc. The technology of fixing the mounting base 22 and the circuit board 11 through the snap structure and the threaded structure is already mature, and will not be elaborated herein one by one.
[0089] Referring to Figure 2 and Figure 4 , in some embodiments, a second positioning structure is further provided between the mounting base 22 and the light guide main body portion 141. The second positioning structure includes a second positioning portion 51 and a second mating portion 52 adapted to the second positioning portion 51. One of the second positioning portion 51 and the second mating portion 52 is provided on the mounting base 22, and the other is provided on the light guide main body portion 141. In this way, through the mutual adaptation of the second positioning portion 51 and the second mating portion 52, the accurate alignment between the mounting base 22 and the light guide main body portion 141 can be ensured. This design reduces the error in the assembly process, improves the assembly precision, and makes the overall structure of the electronic product 100 more stable. With a clear positioning structure, the assembly worker can assemble the mounting base 22 and the light guide main body portion 141 together faster and more accurately without repeatedly adjusting the position, thereby improving the production efficiency. The second positioning structure not only plays a positioning role, but also can enhance the structural connection strength between the mounting base 22 and the light guide main body portion 141 to a certain extent, making the overall structure more firm.
[0090] It should be noted that there are various types of the second positioning portion 51 and the second mating portion 52. For example, in some embodiments, one of the second positioning portion 51 and the second mating portion 52 includes a positioning protrusion, and the other includes a positioning groove. In other embodiments, one of the second positioning portion 51 and the second mating portion 52 includes a positioning hole, and the other includes a positioning post. Specifically, the types of the second positioning portion 51 and the second mating portion 52 can be selected according to needs, and the present application does not limit this.
[0091] Referring to Figure 2, in some embodiments, the mounting base 22 and the light guide main body 141 are fixedly connected by a second connecting member 42 to fix the light guide main body 141 to the mounting base 22. In this way, the second connecting member 42 can ensure that the light guide main body 141 is firmly fixed on the mounting base 22, thereby effectively preventing the light guide main body 141 from shaking or falling off due to external forces during use. This stable connection helps to improve the structural stability and service life of the entire electronic product 100. By tightly fixing the light guide main body 141 to the mounting base 22 through the second connecting member 42, potential safety hazards caused by loose or fallen-off components can be reduced, ensuring the safety of users during use.
[0092] It should be noted that there are various types of the second connecting member 42. For example, the second connecting member 42 may include glue, double-sided tape, snap structures, or threaded structures, etc. Specifically, the selection of the type of the second connecting member 42 can be made according to needs, and this application does not make any limitations in this regard.
[0093] In some embodiments, the electronic product includes an atomizer. In one embodiment, the atomizer can atomize e-liquid. In other embodiments, the atomizer can atomize aromatherapy liquid. Specifically, this application does not make any limitations in this regard.
[0094] In the description of this application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "a plurality" is two or more unless otherwise specifically defined.
[0095] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0096] Among the embodiments, implementation manners, and related technical features of this application, they can be combined and replaced with each other without conflict.
[0097] The above are only the preferred embodiments of this application and do not impose any form of limitation on this application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application still fall within the scope of the technical solution of this application.
Claims
1. A light-guiding key assembly, used for installation in a housing, characterized in that: The light-guiding key assembly comprises: A circuit board, a switch component and a plurality of light sources are provided on one side of the circuit board facing the through hole of the housing, the switch component and the plurality of light sources are arranged at intervals, and the plurality of light sources are arranged at intervals; A light guide pressing member is arranged on a side of the circuit board facing the through hole of the housing and can trigger the switch member, the light guide pressing member comprises a light guide main body and a light-transmitting pressing part connected to each other, the light-transmitting pressing part is used to be inserted into the through hole, the light guide main body is arranged between the light-transmitting pressing part and the circuit board, the light guide main body comprises a plurality of light guide parts arranged at intervals, the light incident surfaces of the plurality of light guide parts are arranged one-to-one correspondingly to the plurality of light sources, and the light emitting surface of each light guide part is arranged opposite to the light-transmitting pressing part; The light shielding part comprises a plurality of light shielding arms, each of which is abutted between the circuit board and the light guide body, and a light shielding arm is arranged between any two adjacent light sources.
2. The light-guiding key assembly according to claim 1, characterized in that: The light shielding portion further comprises a connecting arm, wherein the connecting arm is abutted between the circuit board and the light guide main body portion and is connected to one end of a plurality of the light shielding arms.
3. The light-guiding key assembly according to claim 1, characterized in that: The light-transmitting pressing portion comprises a pressing portion, a first elastic arm, and a second elastic arm, wherein the pressing portion is used to be inserted into the insertion hole, the pressing portion is extended along a first direction, and the first elastic arm and the second elastic arm are respectively connected to the two sides of the pressing portion along a second direction, and the second direction is perpendicular to the first direction; The light source and the switch element are spaced apart along the second direction, the pressing portion is staggered from the switch element on the orthographic projection of the circuit board, and the switch element is arranged opposite to the first elastic arm and can be triggered by the first elastic arm; The first elastic arm and the second elastic arm abut against the light guide body, the pressing portion is spaced apart from the light guide body, and along the first direction, the length of the first elastic arm is greater than the length of the second elastic arm.
4. The light-guiding key assembly according to claim 3, characterized in that: Along the first direction, the length of the first elastic arm is less than the length of the pressing portion, the length of the second elastic arm is greater than or equal to the length of the pressing portion, and along the second direction, the center line of the first elastic arm, the center line of the second elastic arm and the center line of the pressing portion are collinearly arranged; and / or, The elasticity of the first elastic arm is greater than the elasticity of the second elastic arm.
5. The light-guiding key assembly according to claim 3, characterized in that: The light guide body has a restoring elastic arm between the first elastic arm and the switch element, and the restoring elastic arm is in contact with the first elastic arm and the switch element respectively.
6. The light-guiding key assembly according to claim 5, characterized in that: Along the second direction, the length of the resetting elastic arm is L1, wherein 0.7 mm ≤ L1 ≤ 1.2 mm; and / or, Along the direction from the first elastic arm to the reset elastic arm, the thickness of the reset elastic arm is H, wherein 0.2 mm≤H≤0.3 mm.
7. The light-guiding key assembly according to claim 5, characterized in that: A groove is provided on one side of the resetting elastic arm facing the first elastic arm, and the groove is provided corresponding to the switch element; A first boss is protruding from one side of the first elastic arm facing the reset elastic arm, and the first boss is installed in the groove.
8. The light-guiding key assembly according to claim 5, characterized in that: A second boss is protruding from one side of the resetting elastic arm facing the circuit board. The second boss is arranged corresponding to the switch component and is used for abutting against the switch component.
9. The light-guiding key assembly according to any one of claims 3 to 8, characterized in that: Along the spacing direction between the switch element and the plurality of light sources, the distance between the orthographic projection of the light source on the circuit board and the center of the orthographic projection of the pressing portion on the circuit board is D1, wherein 1mm≤D1≤2mm; and / or, Along the spacing direction between the switch element and the plurality of light sources, the distance between the orthographic projection of the switch element on the circuit board and the center of the orthographic projection of the pressing portion on the circuit board is D2, wherein D2>2 mm.
10. An electronic product, characterized in that: include: The shell is provided with a through hole; The light-guiding key assembly according to any one of claims 1 to 9, wherein the light-guiding key assembly is mounted on the housing.
11. The electronic product according to claim 10, characterized in that: The housing comprises a mounting seat arranged opposite to the through hole, the mounting seat is used for mounting the circuit board, and a support portion is provided on a side of the mounting seat facing the through hole; The light-guiding pressing member comprises a trigger arm and a support arm which are arranged opposite to each other along the spacing direction between the switch member and the plurality of light sources. The elasticity of the trigger arm is greater than that of the support arm. The trigger arm is arranged corresponding to the switch member and can trigger the switch member. The support arm abuts against the support portion.
12. The electronic product according to claim 11, characterized in that: The support portion includes a plurality of abutment platforms, and the plurality of abutment platforms are arranged at intervals along a spacing direction of the plurality of lamp sources.