Flexible circuit board

Abstract

The utility model belongs to the technical field of optical equipment, and discloses a flexible circuit substrate, which comprises a base part and a plurality of strip-shaped parts, the plurality of strip-shaped parts are sequentially arranged around the edge of the base part, and the plurality of strip-shaped parts respectively extend from the base part to the direction far away from the base part. An opening area is formed between the strip-shaped part edges of every two adjacent strip-shaped parts, the strip-shaped part edges of every two adjacent strip-shaped parts can be overlapped to form an overlapped area to close or partially close the opening areas, and the strip-shaped part edges of every two adjacent strip-shaped parts can be overlapped and bent on the same side to form the flexible circuit substrate with a cambered surface structure. The utility model is suitable for optical equipment with specific configurations, such as hair growing caps, face illumination instruments and the like; the overlapping area does not have obvious creases or local bulges, and the cambered surface configuration is more uniform and consistent, thereby ensuring that the flexible circuit substrate can form a cambered surface configuration structure with a flatter appearance.

Description

[0001] (This application is a divisional application of the original application, filed on July 9, 2024, application number:

[0002] 2024216113085, Invention Title: Optical Components and Optical Devices Technical Field

[0003] This utility model relates to the field of optical equipment technology, and in particular to a flexible circuit board. Background Technology

[0004] Irradiating the skin with light of specific wavelengths has been recognized as beneficial; for example, red light with a wavelength of 650nm has been shown to stimulate hair follicles, achieving the effects of hair growth or preventing hair loss.

[0005] Devices that use light sources to irradiate specific parts of the human body require flexible circuit boards that are easy to bend or shape to support the light source. However, due to the poor rigidity of the flexible circuit boards themselves, they cannot form an ideal optical surface after being shaped or bent. This results in poor flatness of the circuit board when it needs to be at least partially exposed, failing to provide users with better visual improvement. Furthermore, the unsatisfactory optical surface further affects the irradiation effectiveness of the light emitted from the light source. Utility Model Content

[0006] The purpose of this invention is to provide a flexible circuit board to solve the problem of obvious creases or local bulges in the curved surface configuration of flexible circuit boards.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A flexible circuit board, comprising:

[0009] Base portion;

[0010] The strip-shaped portion is provided in multiple ways, and the multiple strip-shaped portions are arranged sequentially around the edge of the base portion. The multiple strip-shaped portions extend from the base portion in a direction away from the base portion, and there is an opening area between the edges of two adjacent strip-shaped portions.

[0011] The edges of two adjacent strips can overlap to form an overlapping area, and the overlapping area can close or partially close the opening area between the two adjacent strips;

[0012] The overlapping edges of two adjacent strip sections and their bending on the same side can form the flexible circuit board with an arcuate configuration.

[0013] In some embodiments, the opening region has a root opening and an end opening in a direction from the base portion toward a direction away from the base portion, wherein the opening width of the root opening is smaller than the opening width of the end opening.

[0014] In some embodiments, the edges of two adjacent strip portions are provided with arc-shaped holes at the root opening, the arc-shaped segments of the arc-shaped holes protrude toward one side of the base portion, and the arc-shaped holes communicate with the root opening.

[0015] In some embodiments, the arc-shaped hole is a superior arc-shaped hole, wherein the two ends of the arc-shaped segment of the superior arc-shaped hole intersect with the edges of the two adjacent strip-shaped portions at the root opening, and the diameter of the superior arc-shaped hole is not less than the opening width of the root opening.

[0016] In some embodiments, the diameter of the superior arc hole is 0.5mm-10mm.

[0017] In some embodiments, the sum of the surface areas of the overlapping regions formed by the plurality of strips accounts for no more than 10% of the total area of ​​the plurality of strips.

[0018] In some embodiments, when the edges of two adjacent strips overlap, they form an overlapping apex angle, the angle of which is not greater than 40°.

[0019] In some embodiments, the flexible circuit board can be formed by the sequential overlapping of multiple strip portions and bending on the same side to form a semi-ellipsoidal shell structure.

[0020] In some embodiments, the plurality of strip portions include a plurality of first sub-strips, the plurality of first sub-strips being arranged along a first direction on both sides of the base portion, with at least two first sub-strips on each side, and an opening region between the strip portion edges of two adjacent first sub-strips on the same side being a first opening region, the first opening region having an opening characteristic being a first opening characteristic, the first opening characteristic including:

[0021] The opening width of the first opening region gradually increases from the base portion toward a direction away from the base portion.

[0022] In some embodiments, the plurality of strip portions further include at least one second sub-strip, the second sub-strip being disposed at at least one end of the base portion along a second direction, the end of the second sub-strip extending from the base portion in a direction away from the base portion, and an opening region between the two side edges of the second sub-strip and the side edge of the adjacent first sub-strip being a second opening region, the second opening region having an opening characteristic being a second opening characteristic, the second opening characteristic including:

[0023] The opening width of the second opening region gradually increases from the base portion toward a direction away from the base portion.

[0024] In some embodiments, the extension length of the base portion along the second direction is greater than the extension width along the first direction.

[0025] In some embodiments, the second sub-band is configured as a fan shape.

[0026] In some embodiments, two adjacent strips are connected by at least one of the following methods: gluing, welding, sewing, and attachment by a connector.

[0027] In some embodiments, at least one of the multiple strip edges on both sides of the multiple strip portions along their extension direction is curved.

[0028] In some embodiments, the base portion and the plurality of strip portions are an integral structural member.

[0029] The beneficial effects of this utility model are:

[0030] The flexible circuit board provided by this utility model includes a base portion and a strip portion. The strip portion includes multiple strip-shaped portions that extend from the base portion in a direction away from the base portion, and the extension directions of the multiple strip-shaped portions are different from each other. This allows the multiple strip-shaped portions to be connected relatively flexibly to form a flexible circuit board with any desired arc surface configuration. It is suitable for optical devices with special configurations, such as hair growth caps and facial light therapy devices. There is an opening area between the edges of two adjacent strip-shaped portions. From the base portion in a direction away from the base portion, the opening width of the opening area gradually increases. This ensures that when two adjacent strip-shaped portions are connected to form an arc surface configuration with overlapping areas, there are no obvious creases or local bulges in the overlapping areas, and the arc surface configuration is more uniform and consistent. This ensures that the flexible circuit board can form a structure with a flatter arc surface configuration. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the flexible circuit board provided in Embodiment 1 of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the arc-shaped hole on the flexible circuit board provided in Embodiment 1 of this utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the edge of the strip portion in the flexible circuit board provided in Embodiment 1 of this utility model;

[0034] Figure 4 This is a schematic diagram of the first type of structure where two adjacent strips on a flexible circuit board are overlapped and connected, as provided in Embodiment 1 of this utility model.

[0035] Figure 5 This is a schematic diagram of the second type of structure where two adjacent strips on a flexible circuit board are overlapped and connected, as provided in Embodiment 1 of this utility model.

[0036] Figure 6 This is a schematic diagram of a third type of structure where two adjacent strips on a flexible circuit board are overlapped and connected, as provided in Embodiment 1 of this utility model.

[0037] Figure 7 This is a schematic diagram of the structure of the overlapping area formed by the overlapping connection of two adjacent strips on the flexible circuit board provided in Embodiment 1 of this utility model;

[0038] Figure 8 This is a schematic diagram of the shell structure formed by the flexible circuit board provided in Embodiment 1 of this utility model;

[0039] Figure 9 This is a schematic diagram of the structure of the flexible circuit board provided in Embodiment 2 of this utility model;

[0040] Figure 10 This is a schematic diagram of the structure of the flexible circuit board provided in Embodiment 3 of this utility model;

[0041] Figure 11 This is a schematic diagram of the structure of the flexible circuit board provided in Embodiment 4 of this utility model;

[0042] Figure 12 This is a schematic diagram of the optical component provided in Embodiment 5 of this utility model;

[0043] Figure 13 This is a schematic diagram of the structure of the optical component provided in Embodiment Six of this utility model;

[0044] Figure 14 This is a schematic diagram showing the positional relationship between the light source assembly and the housing in the optical assembly provided in Embodiment Six of this utility model. Figure 1 ;

[0045] Figure 15 This is a schematic diagram showing the positional relationship between the light source assembly and the housing in the optical assembly provided in Embodiment Six of this utility model. Figure 2 ;

[0046] Figure 16 This is a schematic diagram showing the positional relationship between the light source assembly and the housing in the optical assembly provided in Embodiment Six of this utility model. Figure 3 ;

[0047] Figure 17This is a schematic diagram showing the positional relationship between the light source assembly and the housing in the optical assembly provided in Embodiment Six of this utility model. Figure 4 ;

[0048] Figure 18 A schematic diagram of the tensioning of the strip portion after the first positioning hole and the snap-fit ​​are connected in the optical component provided in Embodiment 6 of this utility model;

[0049] Figure 19 This is a schematic diagram of the locking component in the optical assembly provided in Embodiment Six of this utility model;

[0050] Figure 20 This is a schematic diagram of the structure of the snap-fit ​​component in the optical assembly provided in Embodiment Six of this utility model;

[0051] Figure 21 This is a schematic diagram of the assembly relationship between the locking member, the snap-fit ​​member, and the strip in the optical component provided in Embodiment Six of this utility model;

[0052] Figure 22 This is a schematic diagram of the assembly relationship between the snap-fit ​​component and the strip portion in the optical component provided in Embodiment Six of this utility model;

[0053] Figure 23 This is a structural diagram showing the assembly relationship between a snap-fit ​​component and a strip in an optical assembly provided in Embodiment 7 of this utility model;

[0054] Figure 24 This is a structural diagram showing the assembly relationship between another type of snap-fit ​​component and a strip in the optical assembly provided in Embodiment 7 of this utility model.

[0055] In the picture:

[0056] 100. Flexible circuit board;

[0057] 110. Base portion; 1101. Limiting hole;

[0058] 120. Strip portion; 121. Strip-shaped portion; 1210. Edge of strip-shaped portion; 1211. First sub-strip; 1212. Second sub-strip; 122. Opening area; 1221. Root opening; 1222. End opening; 1223. Arc-shaped hole; 12231. First arc-shaped hole; 12232. Second arc-shaped hole; 12201. First opening area; 12202. Second opening area; 123. Overlapping area; 124. Adhesive tape; 125. First positioning hole;

[0059] 130. Light-emitting component; 131. Fixed end; 132. Light-emitting end; 133. Accessory; 1331. End; 134. Gap;

[0060] 200, Housing; 210, Light-transmitting area; 220, Non-light-transmitting area; 230, Second positioning hole; 240, Limiting post;

[0061] 300. Locking element; 310. Axial through hole; 320. Stop part; 330. Abutment part; 331. Bottom wall;

[0062] 400, snap-fit ​​component; 410, annular groove; 411, first groove wall; 412, second groove wall; 420, first conical structure; 421, stepped surface; 430, second conical structure; 440, end; 450, gap;

[0063] 500. Skin. Detailed Implementation

[0064] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0065] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0068] This utility model provides an optical component and an optical device, such as Figures 1-24 The optical component includes a housing 200, a flexible circuit board 100, and a light source component. The light source component includes a light-emitting element 130, which solves the problem that the installation of the flexible circuit board 100 is inconvenient and thus affects the illumination effect of the light source component. A detailed description will follow through with examples.

[0069] Example 1: Flexible circuit board.

[0070] Embodiment 1 of this utility model provides a flexible circuit board, such as Figures 1-3 As shown, the flexible circuit board 100 includes a base portion 110 and a strip portion 120. The strip portion 120 includes a plurality of strip-shaped portions 121, which extend from the base portion 110 in a direction away from the base portion 110, and the extension directions of the plurality of strip-shaped portions 121 are different from each other. An opening region 122 is provided between the edges 1210 of two adjacent strip-shaped portions 121. The opening region 122 has an opening characteristic, which includes:

[0071] The opening width of the opening region 122 gradually increases from the base portion 110 toward the direction away from the base portion 110.

[0072] The flexible circuit board 100 provided by this utility model has multiple strip-shaped portions 121 extending from the base portion 110 in a direction away from the base portion 110, and the extension directions of the multiple strip-shaped portions 121 are different from each other, so that the multiple strip-shaped portions 121 can be connected relatively flexibly to form a flexible circuit board with any desired arcuate configuration. It is suitable for the flexible circuit board requirements of optical devices with special configurations such as hair growth caps and facial light therapy devices; such as Figure 1 An opening region 122 is provided between the adjacent edges 1210 of two adjacent strip portions 121. The opening width of the opening region 122 gradually increases from the base portion 110 toward the direction away from the base portion 110. This makes it easier for obvious creases or local bulges to appear on the edge regions of the two adjacent strip portions 121 after they are connected to each other to form an arc-shaped spherical structure. The arc-shaped structure is more uniform and consistent, thereby ensuring that the flexible circuit board can form a structure with a flatter arc-shaped structure.

[0073] In some embodiments, the base portion 110 and the strip portion 120 of this flexible circuit board can be an integral structure (e.g., Figure 1 For example, a single flexible PCB is cut from an area outside the base portion 110 to obtain multiple strip portions 121 and opening areas 122 between the strip portions 121. In other embodiments, the base portion 110 and the strip portions 120 can also be combined structural components. For example, the base portion 110 is an independently set flexible load-bearing member, while the multiple strip portions 121 are arranged sequentially around the edge of the base portion 110 and combined with the base portion 110 to form a desired configuration. Here, the connection between the multiple strip portions 121 and the base portion 110 includes, but is not limited to, at least one or any combination of gluing, welding, sewing, and connector attachment. For ease of description, in the following embodiments, the base portion 110 and the strip portions 120 are cut from a single structural component, with the strip portions 120 arranged circumferentially around the base portion 110.

[0074] In some embodiments, the opening region 122 has a root opening 1221 and an end opening 1222 in a direction from the base portion 110 toward a direction away from the base portion 110, wherein the opening width of the root opening 1221 is smaller than the opening width of the end opening 1222.

[0075] like Figure 2 As shown, the multiple strip-shaped portions 121 extend in different directions, resulting in varying lengths of the opening regions 122 between adjacent strip-shaped portions 121. Each opening region 122 has an opening width that gradually increases from the root opening 1221 to the end opening 1222. The root opening 1221 facilitates the overlapping connection of adjacent strip-shaped portions 121, and the edge areas of the overlapping adjacent strip-shaped portions 121 are less prone to obvious creases or local bulges, resulting in a more uniform and consistent arc surface configuration. Preferably, the width of the root opening 1221 is less than 1 mm. The smaller the width of the root opening 1221, the easier it is for adjacent strip-shaped portions 121 to approach each other when overlapping. The roots of adjacent strip-shaped portions 121 can overlap with a small distance and angle. Generally, the width of the root opening 1221 is not less than 0.5 mm to facilitate the cutting and processing of multiple strip-shaped portions 121.

[0076] In some embodiments, the edges 1210 of two adjacent strip portions 121 are provided with arc-shaped holes 1223 at the root opening 1221. The arc-shaped segment of the arc-shaped hole 1223 protrudes toward one side of the base portion 110, and the arc-shaped hole 1223 communicates with the root opening 1221.

[0077] like Figure 2An arc-shaped hole 1223 is provided at the root opening 1221, and the arc-shaped hole 1223 is connected to the root opening 1221, that is, connected to the opening area 122. This facilitates the formation of the opening area 122 between two adjacent strip-shaped portions 121 by cutting. The cutting method can be integral stamping or blade cutting, etc. It is important to note that the arc-shaped hole 1223 can prevent over-cutting during the cutting process. The first step of the processing flow is to stamp multiple circular holes on the flexible circuit board. The second step is to perform the above-mentioned cutting based on the positioning of the circular holes, including but not limited to integral stamping or blade cutting, and the opening area 122 formed by the cutting is connected to the circular holes. Therefore, the final configuration is an arc-shaped hole 1223 and an opening area 122 connected to the arc-shaped hole 1223. That is, the arc-shaped hole 1223 is formed by integral stamping or blade cutting of the aforementioned circular holes. Here, the circular hole in the first processing step provides a positioning function to facilitate subsequent cutting. Traditionally, flexible circuit boards such as PCBs are made of materials with a certain degree of rigidity and a predetermined, relatively uniform thickness. The rigidity of the flexible circuit board makes it more prone to tearing at the root opening 1221 when subjected to shearing forces such as stamping or blade cutting. In this embodiment, the circular hole, with its continuous arc-shaped inner edge, effectively prevents tearing during the aforementioned stamping or blade cutting. When the two strip-shaped portions 121 overlap, the arc-shaped hole 1223 formed by processing the circular hole increases the amount of overlap deformation at the root opening 1221, ensuring that no visible creases or local bulges are produced in the area surrounding the arc-shaped hole 1223 after the two strip-shaped portions 121 overlap. It can be understood that the diameter of the arc-shaped hole 1223 can be close to the minimum width of the root opening 1221, thus connecting the root opening 1221 through a semi-circular hole. When a smaller diameter arc-shaped hole is provided, it has a shorter arc-shaped inner edge, which makes the hole shape less noticeable after adjacent strips 121 are connected, thereby making the product configuration more unified and improving the user's visual perception.

[0078] In some embodiments, the arc-shaped hole 1223 is a superior arc hole, with both ends of the superior arc hole extending to both ends of the root opening 1221. The two ends of the arc-shaped segment of the superior arc hole intersect with the edges 1210 of the strip-shaped portions 121 of the two adjacent strip-shaped portions 121 at the root opening 1221. The diameter of the superior arc hole is greater than the opening width of the root opening 1221.

[0079] like Figure 2As shown, the superior arc hole is an open hole formed by the arc of a part of a circle with a central angle greater than 180°. The two ends of the superior arc hole are connected to the two ends of the root opening 1221. It should be noted that the superior arc hole with a smaller diameter cannot provide a longer arc-shaped inner edge, which makes the overlap deformation of the two strip-shaped parts 121 less generous when they overlap. After overlapping, there are creases and bulges in the peripheral area of ​​the superior arc hole that are not visually appealing. On the other hand, when a superior arc hole with a larger diameter is provided, it has a longer arc-shaped inner edge, which brings a more generous overlap deformation. This makes the creases and bulges in the peripheral area of ​​the superior arc hole less obvious after the two strip-shaped parts 121 are folded or overlapped. However, the less desirable aspect is that the hole shape is more easily noticed by the user after folding, which also reduces the overall uniformity of the product configuration. Therefore, preferably, the diameter of the arc hole is 0.5mm-10mm and is greater than or equal to the width of the root opening 1221, so that a more moderate preferred solution can be provided for the crease or bulge based on the folded hole shape.

[0080] In some embodiments, the edges 1210 of two adjacent strips 121 can overlap to form an overlapping region 123, and the overlapping region 123 can close or partially close the opening region 122 between the two adjacent strips 121.

[0081] See Figure 3 and Figure 4 On the one hand, when the arc-shaped hole 1223 overlaps with the strip portion 121, its opening forms a closed opening (i.e., closed). This makes the arc-shaped hole 1223 after overlapping an approximately circular hole configuration. In other words, as the overlapping angle further increases, the hole can be further closed inward without restriction. This brings a less obvious visible hole to the circuit board after overlapping and connection, which is beneficial to the visual uniformity of the board after overlapping configuration and can improve the user experience to a certain extent. However, it is obvious that as it closes inward further, the surrounding area of ​​the approximately circular hole formed by the arc-shaped hole 1223 will have more obvious creases or bulges. Therefore, the degree of inward overlapping needs to be limited, but can be partially allowed.

[0082] See Figure 5On the other hand, when the arc-shaped hole 1223 overlaps with the strip portion 121, its opening forms a non-closed opening, making the root opening 1221 visible (i.e., partially closed). The arc-shaped hole 1223 after overlapping is not configured as an approximately circular hole. In other words, with the overlap of the strip portion 121, the arc-shaped hole 1223 can be formed into a non-closed opening, and the root opening 1221 is reserved with the "triangular" opening shape shown in the figure. This brings a smaller amount of folding deformation to the circuit board after overlapping and connecting, which is beneficial for less obvious creases or bulges in the area around the arc-shaped hole 1223 and the edge area of ​​the strip portion 121 after the board overlaps. However, it is obvious that with the appearance of the non-closed opening, there is a more easily noticeable visible opening, that is, the combination of the arc-shaped hole 1223 and the above-mentioned "triangular" opening shape. This is not conducive to the improvement brought to the user after the final overlapping configuration. Therefore, the degree of outward overlap also needs to be limited, but it can be partially allowed.

[0083] In the above embodiments, adjacent overlapping strips 121 can be connected by one or any combination of gluing, welding, sewing, or connector attachments. The connector attachment can be achieved by adhering tape 124 to the outside (e.g., ...). Figure 8 ).

[0084] like Figure 3 The strip portion 121 has overlapping portions reserved on both sides of the strip portion edge 1210 along its extension direction X1. The strip portion edge 1210 of one strip portion 121 is pressed onto another strip portion to form an overlapping area 123. The overlapping area 123 closes at least part of the opening area 122, realizing at least partial connection of the strip portions 121 and forming a flexible circuit board with a special configuration. It has good connection adaptability. According to the specific form of the arc surface configuration required to be formed by the flexible circuit board, two adjacent strip portions 121 can form the required arc surface structure configuration after overlapping.

[0085] In some embodiments, the sum of the surface areas of the overlapping regions 123 formed by the plurality of strips 121 accounts for no more than 10% of the total area of ​​the plurality of strips 121.

[0086] It is understandable that on a flexible circuit board used to mount electrical components such as light sources, if the overlapping area 123 is too large, it will affect the effective area of ​​the mounting area for the light sources and other electrical components, thus reducing utilization. Conversely, if the overlapping area 123 is too small, it will be detrimental to the stability of the curved surface structure after overlapping. Therefore, the total area of ​​the overlapping area 123 does not exceed 10% of the total area of ​​the multiple strip sections 121, which can ensure that the basic working area of ​​the strip section 120 meets the requirements for the rational arrangement of electrical components. For example, for a hair growth cap, a smaller overlapping area can meet the arrangement requirements of at least 400 light sources with a base diameter of 5.6mm in the base section 110 and the strip section 120.

[0087] In some embodiments, when the edges 1210 of two adjacent strip portions 121 overlap, they form an overlapping apex angle, the angle of which does not exceed 40°.

[0088] like Figure 4 The apex angle α of the overlapping region 123 is the apex angle of the overlapping region 123 formed after the edges 1210 of two adjacent strip portions 121 overlap. In some embodiments, at least one of the multiple strip edges 1210 on both sides of the multiple strip portions 121 along their extension direction is curved. When the strip edge 1210 of the strip portion 121 is not a straight line but a curve, the overlapping region 123 is an approximate triangle, that is, all three sides of the triangle are curved. The apex angle is the apex angle of the approximate triangle, and the apex angle is the angle between the tangents of the two curves at the apex angle.

[0089] When the overlapping vertex angle is 0°, such as Figure 6 As shown, two adjacent strips 121 can be more appropriately cut so that after bending them close to each other, they contact each other at the edge 1210 of the strip without overlapping, i.e., the overlap angle is 0. This design ensures that the bent circuit board has a structure on the same curved surface, i.e., there is no upper and lower layer overlap, providing a wider range of implementation options. To further ensure the connectability of two adjacent strips 121, the connection can be achieved by welding, sewing, or a combination of connector attachments. The connector attachment can be achieved by adhesive tape 124 adhering to the outside.

[0090] When the overlapping vertex angle is greater than 0°, such as Figure 7 The edges 1210 of the two strip-shaped portions 121 overlap to form an overlapping region 123. The total area of ​​the overlapping region 123 is less than 10% of the total area of ​​the multiple strip-shaped portions 121, and the apex angle α of the overlap is no greater than 40°, forming an approximately triangular overlapping region 123. The arc-shaped hole 1223 can also be closed better, and the edge areas of the two strip-shaped portions 121 are less likely to have obvious creases or local bulges, resulting in better flatness of the formed arc surface. If the apex angle of the overlap is too large, it will cause visible and obvious creases or local bulges in the area around the arc-shaped hole 1223, and increase the area of ​​the overlapping region 123, affecting the effective usable area of ​​the flexible circuit board.

[0091] In some embodiments, two adjacent strips 121 overlapping and bending on the same side can form a flexible circuit board with an arcuate configuration. The arcuate configuration of the flexible circuit board helps to ensure that the light-emitting element 130 on the flexible circuit board has a defined and adjustable illumination direction, and different curved surfaces can meet the needs of arcuate illumination for, for example, hair growth caps or facial illumination instruments.

[0092] In some embodiments, a flexible circuit board with a semi-ellipsoidal shell structure can be formed by overlapping and bending multiple strips 121 in sequence and bending them on the same side.

[0093] like Figure 8 As shown, when all the strips 121 are bent and connected on the same side in sequence, a flexible circuit board with a shell structure is formed. Taking the flexible circuit board used in a hair growth cap as an example, the shell structure is a spherical shell or an ellipsoidal shell. No visible or obvious creases or local bulges will be produced in the surrounding area where two adjacent strips 121 are connected, or in the area around the arc-shaped hole 1223. The shell structure has a uniform arc surface on both the inner and outer surfaces, which meets the requirements for the arrangement of electrical components. Taking electrical components as light sources as an example, the curved shell structure can provide a greater number of light source arrangements, thereby effectively improving the irradiance energy of the light source and achieving better product performance. Generally speaking, the light source is arranged perpendicularly to the flexible circuit board and has a predetermined irradiation area. Theoretically, the closer the shell structure is to a complete curved surface, the more controllable and stable the energy distribution of the irradiation area is (affected by the position and density of the light source arrangement). In other words, a more uniform curved surface can further improve the irradiation effect. In addition, in order to improve the irradiance energy of the light source, there is often no obstruction in the irradiation path of the light source. That is, in the existing technology, such electronic products will directly expose the light source to the user's line of sight. In other words, the user's perspective can directly observe the entire flexible circuit board with the light source arrangement. The uniform curved surface formed by the above improvements can provide the best curved surface configuration for the viewing angle, thereby improving the user experience.

[0094] In some embodiments, two adjacent strips 121 are connected by at least one of the following methods: gluing, welding, sewing, and attachment via a connector. The connector may be tape 124, such as... Figure 8 .

[0095] Example 2:

[0096] like Figure 9 As shown, the flexible circuit board provided in this embodiment includes a base portion 110 and a strip portion 120. The strip portion 120 includes a plurality of strip-shaped portions 121, each strip-shaped portion 121 including a plurality of first sub-strips 1211. The plurality of first sub-strips 1211 are arranged along a first direction on both sides of the base portion 110. The extension directions of the plurality of first sub-strips 1211 are X0, X1, X2, X3, X4, X5, X6, X7, X8, and X9, respectively. The extension directions of the plurality of first sub-strips 1211 are different. Each side of the base portion 110 may be provided with at least two first sub-strips 1211. In this embodiment, five first sub-strips 1211 are provided on each side. Each first sub-strip 1211 extends from the base portion 110 in a direction away from the base portion 110. Figure 9From a certain perspective, there are no strip-shaped portions 121 at either the upper or lower ends of the base portion 110. The opening region 122 between the strip-shaped edges 1210 of two adjacent first sub-bands 1211 on the same side of the base portion 110 is a first opening region 12201. The opening characteristics of the first opening region 12201 are called first opening characteristics, which include:

[0097] The opening width of the first opening region 12201 gradually increases from the base portion 110 toward a direction away from the base portion 110.

[0098] For ease of explanation, the first direction is defined along the short axis (X-axis) of the base portion 110, and the second direction is defined along the long axis (Y-axis) of the base portion 110, with the first sub-strip 1211 disposed on both sides of the long axis (Y-axis) of the base portion 110. Unless otherwise specified, the directions of the Y-axis and X-axis will be used as the second and first directions respectively. It can be understood that in the flexible circuit board of this embodiment, the plurality of strip portions 121 only include a plurality of first sub-strips 1211. A plurality of first sub-strips 1211 are disposed on both sides of the base portion 110. Among the plurality of first sub-strips 1211 on the same side, at least two first sub-strips 1211 can overlap to form a flexible circuit board with a curved surface. When the plurality of first sub-strips 1211 on the same side overlap sequentially, a shell structure flexible circuit board can be formed. Each of the two adjacent first sub-strips 1211 is provided with a first opening area 12201 and a first arc-shaped hole 12231, which effectively avoids the more obvious creases or local bulges that may occur in the periphery of the first sub-strip 1211 and the periphery of the first arc-shaped hole 12231 when they overlap, which is conducive to obtaining a flexible circuit board with a more uniform arc surface.

[0099] Example 3:

[0100] like Figure 10 As shown, the flexible circuit board provided in this embodiment includes a base portion 110 and a strip portion 120. The strip portion 120 includes a plurality of strip-shaped portions 121, and the plurality of strip-shaped portions 121 include a plurality of first sub-strips 1211. The plurality of first sub-strips 1211 are arranged on both sides of the base portion 110 along a first direction. The extension directions of each first sub-strip 1211 are X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, and X13, respectively. At least two first sub-strips 1211 are provided on each side. In this embodiment, seven first sub-strips 1211 are provided on each side. Each first sub-strip 1211 extends from the base portion 110 in a direction away from the base portion 110. It should be noted that, unlike the second embodiment, in the location of Figure 10From a mid-range perspective, the Y-axis is the major axis of the base portion 110, and the X-axis is the minor axis of the base portion 110. The major axis is parallel to the second direction, and the minor axis is parallel to the first direction. The base portion 110 has two first sub-bands 1211 at its upper and lower ends along its major axis. Here, when the four strip-shaped portions 121 located at the two ends in the X10, X11, X12, and X13 extension directions are arranged relative to both sides of the Y-axis (not overlapping with the Y-axis line), they are defined as first sub-bands 1211. The opening region 122 between the strip-shaped edges 1210 of two adjacent first sub-bands 1211 on the same side of the base portion 110 is a first opening region 12201. The opening characteristics of the first opening region 12201 are called first opening characteristics, which include:

[0101] The opening width of the first opening region 12201 gradually increases from the base portion 110 toward a direction away from the base portion 110.

[0102] It is understood that in the flexible circuit board of this embodiment, the plurality of strip portions 121 only include a plurality of first sub-strips 1211. A plurality of first sub-strips 1211 are provided on both sides and at both ends of the Y-axis of the base portion 110. The first sub-strips 1211 at the ends of the base portion 110 do not overlap with the Y-axis. Among the plurality of first sub-strips 1211 on the same side of the Y-axis, at least two adjacent first sub-strips 1211 can overlap to form a flexible circuit board with a curved surface. When the plurality of first sub-strips 1211 on the same side of the Y-axis overlap sequentially, a flexible circuit board with an approximately ellipsoidal shell structure can be formed. A first opening region 12201 and a first arc-shaped hole 12231 are provided between the plurality of first sub-strips 1211, effectively avoiding obvious creases or local bulges that may occur in the periphery of the first sub-strips 1211 and the periphery of the first arc-shaped hole 12231 during overlap, which is beneficial for obtaining a flexible circuit board with a more uniform curved surface.

[0103] Example 4:

[0104] like Figure 11 As shown, the flexible circuit board provided in this embodiment includes a base portion 110 and a strip portion 120. The strip portion 120 includes a plurality of strip portions 121, and the plurality of strip portions 121 include at least one second sub-strip 1212. The second sub-strip 1212 is arranged along the Y-axis at at least one end of the base portion 110. The end of the second sub-strip 1212 extends along the Y-axis and overlaps with the Y-axis of the base portion 110. The two sides of the strip portion edge 1210 of the second sub-strip 1212 are respectively located on both sides of the Y-axis.

[0105] The second sub-band 1212 extends along the Y-axis from the base portion 110 in a direction away from the base portion 110, with the extension direction being Y1. The opening region 122 between the two side strip edges 1210 of the second sub-band 1212 and the one side strip edge 1210 of the adjacent first sub-band 1211 is a second opening region 12202. The second opening region 12202 has an opening characteristic, which includes:

[0106] The opening width of the second opening region 12202 gradually increases from the base portion 110 toward the direction away from the base portion 110.

[0107] It is understandable that in Example 1 Figure 1 The flexible circuit board shown includes two second sub-strips 1212. A second sub-strip 1212 is respectively disposed at both ends of the base portion 110 along the second direction. (This embodiment...) Figure 11 In the flexible circuit board shown, a second sub-strip 1212 (extending in the Y1 direction) is provided only at the lower end of the base portion 110 as shown in the figure. The number of first sub-strips 1211 on both sides of the base portion 110 can be any number, such as two or more. Figure 3 As shown, two first sub-bands 1211 are provided on each side of the base portion 110, as... Figure 11 The diagram shows six first sub-strips 1211 on each side of the base portion 110, the specific configuration depending on the shape, size, and required configuration of the flexible circuit board. It is important to note that in this case, there is a clear distinction between the first sub-strips 1211 and the second sub-strips 1212. Figure 11 For example, a flexible circuit board includes a base portion 110 and a strip portion 120. The strip portion 120 includes a plurality of strip-shaped portions 121, and the plurality of strip-shaped portions 121 include a plurality of first sub-strips 1211. The plurality of first sub-strips 1211 are arranged on both sides of the Y-axis of the base portion 110, and the extension directions of the plurality of first sub-strips 1211 are X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, and X11, which are different from each other. Each first sub-strip 1211 extends from the base portion. The strips 110 extend in directions away from the base portion 110. When the strips 121 at the two upper ends in the X10 and X11 directions are arranged on both sides relative to the Y-axis (not overlapping with the Y-axis), they are defined as the first sub-strip 1211. When the strips 121 in the Y1 direction pass through the Y-axis (overlapping with the Y-axis), they are defined as the second sub-strip 1212. Therefore, the second sub-strip 1212 is arranged along the Y-axis at at least one end of the base portion 110, and there is one and only one at that end. When the first sub-strip 1211 and the second sub-strip 1212 overlap, the peripheral area of ​​the second arc-shaped hole 12232 and the edge areas of the first sub-strip 1211 and the second sub-strip 1212 are less likely to have obvious creases or bulges.

[0108] In a preferred embodiment, multiple first sub-bands 1211 are symmetrically arranged on both sides of the Y-axis of the base portion 110. The extension directions of the multiple first sub-bands 1211 (X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11) are all different. Except for the two middle first sub-bands 1211 whose strip-shaped edges 1210 are straight, the strip-shaped edges 1210 of the remaining first sub-bands 1211 are all curved. The curvature of the curve increases from the middle to both sides, which is beneficial for adjacent first sub-bands 1211 to simultaneously meet the requirements of the overlapping apex angle and the area of ​​the overlapping region 123 when they overlap. Moreover, after the overlap, no obvious creases or bulges are likely to appear on the edge areas of any two first sub-bands 1211. The arc-shaped hole 1223 between the two first sub-strips 1211 is the first arc-shaped hole 12231. When the two first sub-strips 1211 overlap, the first arc-shaped hole 12231 provides the amount of folding deformation at the root opening 1221, so that after the two first sub-strips 1211 overlap, no visible or obvious creases or local bulges will be generated in the area around the first arc-shaped hole 12231. After the two first sub-strips 1211 overlap, the root opening 1221 adjacent to the first arc-shaped hole 12231 can be closed to form a flexible circuit board with a complete shell structure.

[0109] In some embodiments, the length of the base portion 110 along the long axis is greater than the width along the short axis.

[0110] In this application, the explanation for the base portion 110 is that when the base portion 110 and the strip portion 120 are an integral component (e.g., a single flexible PCB board), the size or shape of the base portion 110 is determined based on pre-cutting requirements. That is, the base portion 110 does not have a clearly defined visible boundary, but can be defined based on the area enclosed by the circular holes. Figure 11As shown in the example, when the flexible circuit board is a single component, it can be first cut into a roughly elliptical structure, and then multiple circular holes are punched into the board. Based on the positioning of these circular holes, cutting is performed. The cutting methods include, but are not limited to, integral stamping or blade cutting. The opening area 122 formed after cutting is connected to the circular holes, thus the final configuration is an arc-shaped hole 1223 and an opening area 122 connected to the arc-shaped hole 1223. That is, the arc-shaped hole 1223 is formed by integral stamping or blade cutting of the aforementioned circular holes, and the base portion 110 is defined by these circular holes. It is approximately a rectangular area enclosed by these holes and does not have a clear boundary. When the base portion 110 and the strip portion 120 are independent components, the base portion 110 can be understood as a flexible component with a clear boundary. It can be connected to the strip portion 120 through various connection methods, including but not limited to one or more combinations of gluing, welding, sewing, and attachment through connectors.

[0111] like Figure 14 As shown, the base portion 110 is elongated, which facilitates the formation of a flexible circuit substrate with an ellipsoidal shell structure by the sequential overlapping of multiple first sub-bands 1211 and multiple second sub-bands 1212. Figure 8 As shown, the ellipsoidal shell structure is easier to fit with the head curve, so as to obtain a flexible circuit board with an adapted head shape and size. In some embodiments, the base portion 110 can also be other geometries, and a corresponding spherical or ellipsoidal shell flexible circuit board configuration can also be obtained by varying the extension length and direction of the plurality of first sub-bands 1211 and the plurality of second sub-bands 1212.

[0112] like Figure 11 In some embodiments, the distance between the two second arc-shaped holes 12232 at the two sides of the strip-shaped edge 1210 of the second sub-band 1212 is ignored. The configuration of the second sub-band 1212 is fan-shaped, where all three sides of the fan shape are curved. The two sides of the strip-shaped edge 1210 of the second sub-band 1212 and its end edge form an approximately fan-shaped surface, which is beneficial for the two sides of the strip-shaped edge 1210 of the second sub-band 1212 to overlap with the strip-shaped edge 1210 of the adjacent first sub-band 1211 to obtain a curved arc surface.

[0113] Example 5: Optical Components.

[0114] This utility model embodiment provides an optical component, such as... Figure 12 It includes a light-emitting element 130 and a flexible circuit board provided in any one of the embodiments of the present invention, from embodiment one to embodiment four. Multiple light-emitting elements 130 are provided, and at least one light-emitting element 130 is distributed in the strip portion 120 of the flexible circuit board.

[0115] The optical component provided by this utility model has multiple strip-shaped portions 121 of the strip portion 120 that can be flexibly connected to form an arc-shaped configuration without obvious creases or bulges. In this way, the installation position and irradiation direction of the light-emitting element 130 can be adjusted by multiple strip-shaped portions 121, avoiding creases or bulges caused by the overlapping connection of multiple strip-shaped portions 121, which helps to ensure the irradiation direction and irradiation distance of the light-emitting element 130.

[0116] In some embodiments, at least one light-emitting element 130 is distributed on the base portion 110 of the flexible circuit board, so that the base portion 110 can also provide light emission, increasing the distribution area of ​​the light-emitting element 130 and meeting different needs.

[0117] In some embodiments, the light-emitting element 130 is a laser light source or an LED light source. For example... Figure 12 Both the strip portion 121 and the base portion 110 are provided with multiple light-emitting elements 130, which can provide light illumination in multiple areas and at multiple angles.

[0118] Example 6: Optical Components;

[0119] like Figure 13 and Figure 14 The optical assembly includes a housing 200, a flexible circuit board 100, and a light source assembly. The light source assembly includes a light-emitting element 130. The housing 200 has a light-transmitting area 210 and an arc-shaped outer wall. The outer wall of the housing 200 is provided with multiple connecting portions. The flexible circuit board 100 includes a base portion 110 and multiple strip portions 121 arranged on at least two opposite sides of the base portion 110. The strip portions 121 extend from the base portion 110 in a direction away from the base portion 110, and the extension directions of the multiple strip portions 121 are different from each other. Each strip portion 121 has at least one mating portion. The light-emitting element 130 is disposed on the flexible circuit board 100 and arranged on one side facing the housing 200. The emitted light of the light-emitting element 130 can pass through the light-transmitting area 210. The mating portion and the connecting portion are connected to each other, so that the flexible circuit board 100 is tensioned and mounted on the outer wall of the housing 200. The tensioned flexible circuit board 100 drives the light-emitting element 130 to abut against the outer wall of the housing 200.

[0120] like Figure 14The housing 200 has a light-transmitting area 210. Each light-emitting element 130 has a fixed end 131 and a light-emitting end 132. The fixed end 131 of the light-emitting element 130 is fixedly connected to the flexible circuit board 100. When the flexible circuit board 100 is installed on the outer wall of the housing 200, the light-emitting end 132 of the light-emitting element 130 is positioned opposite to the light-transmitting area 210 on the housing 200 to provide emitted light. Multiple strip-shaped portions 121 of the flexible circuit board 100 can be overlapped and bent to form a shell structure adapted to the housing 200. The light-emitting element 130 is disposed on the side of the flexible circuit board 100 facing the housing 200. During installation, the light-emitting end 132 of the light-emitting element 130 faces the housing 200 and is directly opposite the light-transmitting area 210, allowing the emitted light to pass through the housing 200 and illuminate the desired light, meeting the user's needs. The housing 200 provides stable support for the flexible circuit board 100 and allows selective transmission of emitted light through the light-transmitting area 210. The flexible circuit board 100 is tensioned and mounted on the housing 200, enabling the flexible circuit board 100 to achieve ideal flatness, which can provide users with a visual improvement. The light emitting end 132 of the light-emitting element 130 can abut against the outer wall of the housing 200, thereby ensuring that the light emitting end 132 of the light-emitting element 130 can better fit the outer wall of the housing 200 to form a continuous light emitting surface. For example, if the outer wall of the housing 200 is a complete and continuous arc surface, then the multiple light-emitting elements 130 that cooperate with it can form an optical surface suitable for the structure of the outer wall of the housing 200, which can improve the irradiation effectiveness of the emitted light of the light source assembly and provide users with more uniform and controllable irradiation light.

[0121] In some embodiments, the mating portion is located at one end of the strip portion 121 away from the base portion 110.

[0122] It is understandable that the closer the mating part is to the end edge of the flexible circuit board 100, the easier it is to obtain a flatter and continuous surface after the flexible circuit board 100 is installed, reducing the possibility of warping deformation at the end edge of the flexible circuit board 100. For example... Figure 13 The mating part is provided at one end of each strip 121 away from the base portion 110, and at least one mating part is provided on each strip 121, so that it can be provided as close as possible to the edge of the shell structure while meeting the tension strength. Similarly, the connecting part is provided at the edge of the shell 200, so that the light-emitting element 130 can be provided in as many areas as possible on the flexible circuit board 100, and the light emitting end 132 of the light-emitting element 130 abuts against the outer wall of the shell 200 under the action of tension.

[0123] In some embodiments, each strip portion 121 carries at least one light-emitting element 130, the light-emitting element 130 being located between the base portion 110 and the mating portion.

[0124] like Figure 12 As shown, multiple light-emitting elements 130 are arranged on each strip portion 121 and multiple light-emitting elements 130 are arranged on the base portion 110. For each strip portion 121, the light-emitting element 130 is arranged in the part between the mating part and the base portion 110. When the mating part and the connecting part are mated and connected, it can ensure that each light-emitting element 130 can abut against the outer wall of the housing 200, improve the installation stability, and further ensure that the light emitting end 132 of the light-emitting element 130 can better fit against the outer wall of the housing 200 to form a continuous light emitting surface, providing users with more uniform and controllable irradiation light.

[0125] In some embodiments, one of the connecting part and the mating part is a first positioning hole 125, and the other is a snap-fit ​​member 400. The snap-fit ​​member 400 can be inserted into the first positioning hole 125 to achieve a mating connection. The outer wall of the snap-fit ​​member 400 at least partially abuts against the inner wall of the first positioning hole 125 and generates relative action and reaction forces. The action and reaction forces drive the flexible circuit board 100 to be tensioned and installed on the outer wall of the housing 200.

[0126] like Figure 13 As shown, the flexible circuit board 100 has a plurality of first positioning holes 125, and the housing 200 has a plurality of snap-fit ​​pieces 400. The plurality of first positioning holes 125 and the plurality of snap-fit ​​pieces 400 are fitted together one-to-one. Specifically, each strip portion 121 on the flexible circuit board 100 has at least one first positioning hole 125 at its end edge away from the base portion 110. The outer edge of the housing 200 is circumferentially provided with a plurality of snap-fit ​​pieces 400, which are corresponding one-to-one with the plurality of first positioning holes 125. When the flexible circuit board 100 is mounted on the housing 200, the plurality of first positioning holes 125 are respectively fitted onto the plurality of snap-fit ​​pieces 400, facilitating connection and easy assembly / disassembly. Preferably, the first positioning hole 125 is an elongated hole, with its major axis along the extending direction of the strip portion 121, to facilitate installation.

[0127] like Figure 18As shown, when the first positioning hole 125 (fitting part) on the flexible circuit board 100 is fitted onto the snap-fit ​​member 400 (connecting part), an interaction force is generated between the first positioning hole 125 and the snap-fit ​​member 400. This force acts on the side of the snap-fit ​​member 400 facing the edge of the housing 200. Under the action of the action force F1 and the reaction force F2, the flexible circuit board 100 can be tensioned and installed on the outer wall of the housing 200. On the one hand, this ensures the connection firmness and assembly convenience of the flexible circuit board 100, enabling the flexible circuit board 100 to achieve ideal flatness and provide users with a visual improvement. On the other hand, it also provides tension for the light emitting end 132 of the light-emitting element 130 to better fit against the outer wall of the housing 200 to form a continuous light emitting surface. The light source assembly forms an optical surface suitable for the structure of the outer wall of the housing 200, thereby ensuring that the user is provided with more uniform and controllable irradiation light and improving the irradiation effectiveness of the emitted light of the light source assembly.

[0128] In some embodiments, when the connecting part is a snap-fit ​​member 400, the outer wall of the snap-fit ​​member 400 is provided with an annular groove 410, and the first positioning hole 125 is sleeved in the annular groove 410.

[0129] like Figure 20 and Figure 21 The outer wall of the snap-fit ​​component 400 is provided with an annular groove 410, and the mating part (first positioning hole 125) can be fitted onto the snap-fit ​​component 400 and snapped into the annular groove 410 to achieve fixed installation. Figure 21 The mating part (first positioning hole 125) and the connecting part (clamping member 400) form a tension force at the contact point. The tension force can prevent the strip part 121 from moving along the long axis of the clamping member 400, and the connection is firm. At the same time, it also provides the light-emitting element 130 with a force component perpendicular to the outer wall of the housing 200, so that the light emitting end 132 can abut against the outer wall of the housing 200, thereby ensuring that the user is provided with more uniform and controllable irradiation light.

[0130] In some embodiments, the snap-fit ​​member 400 is provided with a first conical structure 420 and a second conical structure 430 in sequence along its long axis. The bottom surface of the first conical structure 420 forms a stepped surface 421 at the top of the second conical structure 430. The bottom surface of the second conical structure 430 forms a first groove wall 411 of an annular groove 410. The second groove wall 412 is located on the annular groove 410 and is opposite to the first groove wall 411. The optical device also includes a locking member 300, which has an axial through hole 310 and a bottom wall 331 formed at one end thereon. The bottom wall 331 is located at the abutment portion 330 end of the locking member 300. The axial through hole 310 passes through the bottom wall 331. A stop portion 320 is formed at the other end of the axial through hole 310 away from the bottom wall 331. When the locking member 300 is fitted with the snap-fit ​​member 400 through the axial through hole 310, the stop portion 320 can cross the stepped surface 421 and snap-fit ​​with it. Furthermore, the gap between the bottom wall 331 and the second groove wall 412 can restrict the movement of the strip portion 121 along the long axis direction of the snap-fit ​​member 400. Specifically, the axial through hole 310 is a stepped hole, and a stop portion 320 is formed on the inner wall of the axial through hole 310. The stop portion 320 of the axial through hole 310 has a minimum hole diameter. The stepped surface 421 protrudes from the outer wall of the snap-fit ​​member 400, and the outer diameter of the stepped surface 421 is larger than the hole diameter of the stop portion 320. The stepped surface 421 and the annular groove 410 are sequentially arranged in the axial direction of the snap-fit ​​member 400. When the snap-fit ​​member 400 is fitted into the axial through hole 310, after the stop portion 320 crosses the stepped surface 421, the stop portion 320 abuts against the stepped surface 421, and the bottom wall 331 of the locking member 300 abuts against the step surface 421. On one side of the strip 121, and simultaneously on the other side of the strip 121 abutting against the second groove wall 412, the strip 121 of the flexible circuit board 100 is confined in its width direction between the bottom wall 331 and the second groove wall 412, preventing it from shifting along the long axis of the snap-fit ​​member 400, while simultaneously connecting and fixing the snap-fit ​​member 400 to the locking member 300. Correspondingly, under the action of force F1 and reaction force F2, the flexible circuit board 100 is also confined in the cross-sectional direction of the snap-fit ​​member 400, thereby achieving ideal positioning and tensioning effects. In a preferred embodiment, the locking member 300 is made of a material with a certain elastic modulus, such as rubber or plastic, which facilitates installation.

[0131] like Figure 22As shown, in some other embodiments, the snap-fit ​​member 400 has a conical structure along its long axis. The bottom surface of the conical structure forms a first groove wall 411 of an annular groove 410. A second groove wall 412 is located on the annular groove 410 and opposite the first groove wall 411. The gap between the first groove wall 411 and the second groove wall 412 restricts the movement of the strip portion 121 along the long axis of the snap-fit ​​member 400. Unlike the previous embodiment, this embodiment does not use a locking member 300, but directly utilizes the annular groove 410 provided on the snap-fit ​​member 400. Specifically, the strip-shaped portion 121 of the flexible circuit board 100 has a first positioning hole 125 at its edge. The first positioning hole 125 can be fitted into the annular groove 410. After fitting, the strip-shaped portion 121 is restricted in its width direction between the first groove wall 411 and the second groove wall 412, preventing it from moving along the long axis of the snap-fit ​​member 400. Correspondingly, under the action of force F1 and reaction force F2, the flexible circuit board 100 is also restricted in the cross-sectional direction of the snap-fit ​​member 400, thereby achieving ideal positioning and tensioning effects. Compared to the previous embodiment, this embodiment can achieve positioning and tensioning effects more quickly.

[0132] like Figure 21 As shown, the axial through hole 310 includes a tapered hole section and a circular hole section along its axial direction. A stop portion 320 is formed between the tapered hole section and the circular hole section. The tapered hole section is adapted to the shape of the second cone structure 430. During installation, the outer wall of the first cone structure 420 facilitates the installation guide of the locking member 300, and makes it easy for the stop portion 320 to pass through the first cone structure 420 and cross the bottom surface of the first cone structure 420 before being reversed and engaged on the step surface 421 to achieve locking. The tapered hole segment is fitted onto the second tapered structure 430. The end of the locking member 300 opposite to the tapered hole segment and away from the circular hole segment is the abutment portion 330. The end of the abutment portion 330 is the bottom wall 331, which can abut against the flexible circuit board 100, thereby limiting the flexible circuit board 100 on the connecting portion or the body of the housing 200, preventing the flexible circuit board 100 from deforming and falling out under the action of tension force. In addition, the part between the bottom wall 331 and the stop portion 320 on the locking member 300 can be clamped between the second groove wall 412 and the stepped surface 421, improving the installation stability and firmness. By setting the first conical structure 420 and the second conical structure 430, a stepped surface 421 and an annular groove 410 are sequentially formed on the outer wall of the connecting part. This allows the flexible circuit board 100 to be fitted into the annular groove 410, and the locking member 300 to be fitted onto the end of the connecting part again and locked at the stepped surface 421 and abut against the surface of the flexible circuit board 100 to prevent it from moving.

[0133] In some embodiments, the housing 200 and the flexible circuit board 100 are provided with a limiting post 240 and a limiting hole 1101, respectively, and the limiting hole 1101 can be sleeved on the limiting post 240.

[0134] like Figure 13 The flexible circuit board 100 is provided with limiting holes 1101, and the housing 200 is provided with limiting posts 240 at corresponding positions. During assembly, the operator first mates the limiting holes 1101 with the limiting posts 240 to achieve initial positioning of the flexible circuit board 100. Then, each strip 121 is positioned on the snap-fit ​​member 400 through the first positioning hole 125. Finally, the locking member 300 is fitted onto the snap-fit ​​member 400 to complete the assembly. This assembly method provides a faster and more precise assembly method. Combined with the design of the flexible circuit board 100, it enables rapid assembly of the flexible circuit board 100 and the housing 200. At the same time, the light emitting end 132 of the light-emitting element 130 can abut against and adhere to the outer wall of the housing 200 under tension, ensuring that the light emitting ends 132 of all light-emitting elements 130 are located on the same arc surface, thereby providing users with more uniform and controllable irradiation light.

[0135] In some embodiments, the base portion 110 of the flexible circuit board 100 is provided with a plurality of limiting holes 1101, and the outer wall of the housing 200 is provided with a plurality of limiting posts 240, wherein the plurality of limiting holes 1101 and the plurality of limiting posts 240 are connected in a one-to-one correspondence.

[0136] like Figure 13 Multiple limiting holes 1101 are spaced apart along the central axis (Y-axis) of the base portion 110 of the flexible circuit board 100, facilitating punching on the flexible circuit board 100 and ensuring uniform tension on the multiple strip-shaped portions 121 symmetrically arranged on both sides of the multiple limiting holes 1101 after installation, thus ensuring uniform stress on the flexible circuit board 100. In a preferred embodiment, at least two limiting holes 1101 and at least two limiting posts 240 are provided, which has the advantage of accurate positioning and can prevent torsional deformation caused by uneven stress during tensioning of the strip-shaped portions 121.

[0137] In some embodiments, multiple light-transmitting areas 210 are provided, and multiple light-emitting elements 130 are provided, with each light-transmitting area 210 corresponding to at least one light-emitting element 130.

[0138] like Figure 14As shown, the light-transmitting area 210 on the housing 200 has a surface that is higher than the non-light-transmitting area 220. The area of ​​a single light-transmitting area 210 is larger than the area of ​​the light-emitting end 132 of a single light-emitting element 130. The light-emitting end 132 of the light-emitting element 130 can abut against the light-transmitting area 210 to provide complete emitted light. The light-transmitting area 210 can correspond to multiple light-emitting elements 130. The light-emitting end 132 abuts against the housing 200. The emitted light of the light-emitting element 130 can completely pass through the light-transmitting area 210, so that multiple light-emitting elements 130 have the same consistent emission surface, providing consistent emitted light energy and uniform light emission.

[0139] like Figure 15 As shown, when the area of ​​a single light-transmitting area 210 is smaller than the area of ​​the light-emitting end 132 of the light-emitting element 130, the light-emitting end 132 abuts against the non-light-transmitting area 220 on the housing 200. The light-transmitting area 210 can be a through hole provided on the non-light-transmitting area 220 or a light-transmitting medium with a thickness smaller than the non-light-transmitting area 220. Thus, there is a gap 134 between the light-emitting end 132 and the surface of the light-transmitting area 210, or when the emitted light passes through the light-transmitting area 210, there will be partial obstruction. This provides an optimized design with adjustable light transmission, further meeting the functional requirements of the device.

[0140] like Figure 17 As shown, the housing 200 is made of transparent material. When the housing 200 is made of transparent material, the entire area of ​​the housing 200 is a light-transmitting area 210, and the light emitting end 132 of the light-emitting element 130 can directly abut against the outer wall of the housing 200, so that the multiple light-emitting elements 130 have uniform emitted light intensity and the emitted light direction determined by the curved surface of the housing 200, which is beneficial to the control of light irradiation energy and the assembly and manufacturing of the product. When the housing 200 adopts a fully transparent design, most of the flexible circuit board 100 facing the user and the light-emitting elements 130 arranged on it can be fully exposed within the visible range. Furthermore, the cutting form of the flexible circuit board 100 ensures that the curved board exposed within the user's visible range is visually complete, continuous, and uniform, that is, without obvious creases or local bulges, effectively improving the user experience. More importantly, the fully transparent housing 200 design can ensure the light irradiation effectiveness of the light-emitting element 130 and maximize the light irradiation range.

[0141] In some embodiments, the optical component further includes an attachment 133, which is sleeved on the light emitting end 132 of the light-emitting element 130, and the end 1331 of the attachment 133 protrudes from the light emitting end 132 of the light-emitting element 130 and abuts against the outer wall of the housing 200.

[0142] like Figure 16As shown, an accessory 133 is fitted on the outside of the light-emitting element 130. The accessory 133 can be a cylindrical opaque material. The end 1331 of the accessory 133 abuts against the housing 200, thereby creating a gap 134 between the light-emitting end 132 of the light-emitting element 130 and the surface of the housing 200. This allows for adjustment of the irradiation area of ​​the emitted light on the skin 500 and provides protection against irradiation of the light-emitting element 130.

[0143] In some embodiments, the housing 200 is a hemispherical or semi-ellipsoidal shell structure. Correspondingly, the flexible circuit board 100 is mounted on the housing 200, and a plurality of strips 121 are tensioned and mounted on the housing 200 so that the light-emitting element 130 abuts against the outer wall of the housing 200, forming an optical surface suitable for the outer wall structure of the housing 200, which is suitable for hair growth caps or facial irradiation devices and meets the irradiation requirements of the curved area.

[0144] Example 7: Optical Components

[0145] like Figure 23 As shown, the optical component provided in this embodiment includes a housing 200, a flexible circuit board 100, a light source assembly, and a snap-fit ​​component 400. The housing 200 has a light-transmitting area 210 and an arc-shaped outer wall, and the housing 200 is provided with a plurality of second positioning holes 230. The flexible circuit board 100 includes a base portion 110 and a plurality of strip portions 121 arranged on at least two opposite sides of the base portion 110. The strip portions 121 extend from the base portion 110 in a direction away from the base portion 110, and the extension directions of the plurality of strip portions 121 are different from each other. Each strip portion 121 has at least one second positioning hole 230. The first positioning hole 125 is arranged corresponding to 0; the light source assembly is disposed on the flexible circuit board 100 and arranged on one side facing the housing 200. The light source assembly includes a light-emitting element 130, and the emitted light of the light-emitting element can pass through the light-transmitting area 210; the snap-fit ​​member 400 can pass through the first positioning hole 125 and the second positioning hole 230 and respectively transition-fit with them; wherein, after the snap-fit ​​member 400 transition-fits with the first positioning hole 125 and the second positioning hole 230, the flexible circuit board 100 can be tensioned and installed on the outer wall of the housing 200, and the tensioned flexible circuit board 100 drives the light source assembly to abut against the outer wall of the housing 200.

[0146] It is understood that the snap-fit ​​component 400 is a component arranged independently of the flexible circuit board 100 and the housing 200. The number of snap-fit ​​components corresponds to the first positioning hole 125 and the second positioning hole 230. The first positioning hole 125 can be an elongated hole opened on the strip portion 121, and the second positioning hole 230 can be a hole shape that matches the outer wall contour of the snap-fit ​​component 400, so as to ensure that the snap-fit ​​component 400 has a controllable relative gap or no gap after being connected with the second positioning hole 230, thereby realizing that the flexible circuit board 100 can be tensioned and installed on the housing 200. During assembly, the snap-fit ​​component 400 can first be inserted into the second positioning hole 230 and the connection between the two can be maintained. Then, the flexible circuit board 100 can be inserted into the snap-fit ​​component 400 through the first positioning hole 125. Since the housing 200 and the snap-fit ​​component 400 already have a relative connection, after the flexible circuit board 100 is inserted and connected, the inner wall of the first positioning hole 125 can generate relative action and reaction forces with the outer wall of the snap-fit ​​component 400. The action and reaction forces drive the flexible circuit board 100 to be tightly installed on the outer wall of the housing 200. This embodiment does not limit the insertion order of the snap-fit ​​component 400 into the first positioning hole 125 and the second positioning hole 230, as long as the snap-fit ​​component 400 can be inserted into the first positioning hole 125 and the second positioning hole 230 and their relative positional relationship can be maintained.

[0147] In some embodiments, the snap-fit ​​member 400 may transition fit with the first positioning hole 125 or with the second positioning hole 230. The transition fit includes interference fit and clearance fit. Specifically, the outer wall of the snap-fit ​​component 400 is provided with an annular groove 410, the first positioning hole 125 is an elongated hole with its minor axis length greater than or equal to the outer diameter of the annular groove 410, and the second positioning hole 230 is a circular hole with its diameter less than or equal to the outer diameter of the annular groove 410. The snap-fit ​​component 400 is a structural component with a certain elastic modulus, which can be made of rubber or a deformable structure to ensure that the first positioning hole 125 and the second positioning hole 230 can be inserted into it. When the first positioning hole 125 and the second positioning hole 230 are fitted into the annular groove 410, the annular groove 410 is interference-fitted with the second positioning hole 230 and clearance-fitted with the first positioning hole 125. The inner wall of the first positioning hole 125 and the outer wall of the snap-fit ​​component 400 generate relative action and reaction forces. The action and reaction forces drive the flexible circuit board 100 to be tensioned and installed on the outer wall of the housing 200.

[0148] See Figure 23In some embodiments, the snap-fit ​​member 400 has a conical structure at one end along its long axis and an end 440 at the other end. An annular groove 410 is formed between the conical structure and the end 440. The bottom surface of the conical structure forms the first groove wall 411 of the annular groove 410. The second groove wall 412 is located on the annular groove 410 and opposite to the first groove wall 411. At the same time, gaps 450 with openings on the same side are formed on both axial sides of the snap-fit ​​member 400. The gaps 450 can ensure that the first positioning hole 125 and / or the second positioning hole 230 partially compress the conical structure inward during the process of connecting to the annular groove 410, so as to ensure smooth snap-fit ​​to the annular groove 410. After snap-fit, the inner wall of the first positioning hole 125 and the outer wall of the snap-fit ​​member 400 generate relative action and reaction forces. The action and reaction forces drive the flexible circuit board 100 to be tensioned and installed on the outer wall of the housing 200. Meanwhile, the annular groove 410 has a groove width that can limit the relative movement of the strip 121 and the housing 200 along the long axis of the snap-fit ​​400.

[0149] See Figure 24 In some embodiments, the snap-fit ​​member 400 has a conical structure at one end along its long axis and an end 440 at the other end. An annular groove 410 is formed between the conical structure and the end 440. The bottom surface of the conical structure forms the first groove wall 411 of the annular groove 410. A second groove wall 412 is located on the annular groove 410 and opposite to the first groove wall 411. At the same time, an elongated oval gap 450 is formed in the axial middle section of the snap-fit ​​member 400. The gap 450 can ensure that the first positioning hole 125 and / or the second positioning hole 230 can partially compress the conical structure inward during the process of connecting to the annular groove 410, so as to ensure smooth snap-fit ​​to the annular groove 410. After snap-fit, the inner wall of the first positioning hole 125 and the outer wall of the snap-fit ​​member 400 generate relative action and reaction forces. The action and reaction forces drive the flexible circuit board 100 to be tensioned and installed on the outer wall of the housing 200. Meanwhile, the annular groove 410 has a groove width that can limit the relative movement of the strip 121 and the housing 200 along the long axis of the snap-fit ​​400.

[0150] Based on the optical components provided in the above embodiments, this utility model also provides an optical device, including the optical components provided in any of the above embodiments, such as a hair growth cap or a facial phototherapy device. The flexible circuit board 100 in the optical component can be tensioned and mounted on the outer wall of the housing 200 via multiple strips 121, causing the light source component to abut against the outer wall of the housing 200. This further allows the abutted light source component to form an optical surface suitable for the structure of the outer wall of the housing 200. The flexible circuit board 100 achieves ideal flatness, which not only provides visual improvement for the user, but also further enhances the irradiation effectiveness of the emitted light; on the other hand, it also provides a structural improvement that is easier to assemble.

[0151] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A flexible circuit board, characterized in that, include: Base portion; The strip-shaped portion is provided in multiple ways, and the multiple strip-shaped portions are arranged sequentially around the edge of the base portion. The multiple strip-shaped portions extend from the base portion in a direction away from the base portion, and there is an opening area between the edges of two adjacent strip-shaped portions. The edges of two adjacent strips can overlap to form an overlapping area, and the overlapping area can close or partially close the opening area between the two adjacent strips; The overlapping edges of two adjacent strip sections and their bending on the same side can form the flexible circuit board with an arcuate configuration.

2. The flexible circuit board according to claim 1, characterized in that, The opening region has a root opening and an end opening in a direction from the base portion toward the direction away from the base portion, wherein the opening width of the root opening is smaller than the opening width of the end opening.

3. The flexible circuit board according to claim 2, characterized in that, The edges of two adjacent strip-shaped portions are provided with arc-shaped holes at the root opening. The arc-shaped segment of the arc-shaped hole protrudes towards one side of the base portion, and the arc-shaped hole communicates with the root opening.

4. The flexible circuit board according to claim 3, characterized in that, The arc-shaped hole is a superior arc hole. The two ends of the arc-shaped segment of the superior arc hole intersect with the edges of the two adjacent strip-shaped portions at the root opening. The diameter of the superior arc hole is not less than the opening width of the root opening.

5. The flexible circuit board according to claim 4, characterized in that, The diameter of the superior arc hole is 0.5mm-10mm.

6. The flexible circuit board according to claim 1, characterized in that, The sum of the surface areas of the overlapping regions formed by the plurality of strips accounts for no more than 10% of the total area of ​​the plurality of strips.

7. The flexible circuit board according to claim 1, characterized in that, When the edges of two adjacent strips overlap, they form an overlapping apex angle, the angle of which is no greater than 40°.

8. The flexible circuit board according to claim 1, characterized in that, The flexible circuit board is formed by the overlapping of multiple strip-shaped portions and bending them on the same side to form a semi-ellipsoidal shell structure.

9. The flexible circuit board according to claim 1, characterized in that, The plurality of said strip-shaped portions include a plurality of first sub-strips, the plurality of first sub-strips being arranged along a first direction on both sides of the base portion, each side having at least two first sub-strips, the opening region between the edges of two adjacent first sub-strips on the same side being a first opening region, the first opening region having an opening characteristic being a first opening characteristic, the first opening characteristic including: The opening width of the first opening region gradually increases from the base portion toward a direction away from the base portion.

10. The flexible circuit board according to claim 9, characterized in that, The plurality of said strip portions further include at least one second sub-strip, the second sub-strip being arranged along a second direction at at least one end of the base portion, the end of the second sub-strip extending from the base portion in a direction away from the base portion, and an opening region between the two side edges of the second sub-strip and the side edge of the adjacent first sub-strip being a second opening region, the second opening region having an opening characteristic being a second opening characteristic, the second opening characteristic including: The opening width of the second opening region gradually increases from the base portion toward a direction away from the base portion.

11. The flexible circuit board according to claim 10, characterized in that, The length of the base portion extending along the second direction is greater than the width extending along the first direction.

12. The flexible circuit board according to claim 10, characterized in that, The second sub-band has a fan-shaped configuration.

13. The flexible circuit board according to claim 1, characterized in that, Two adjacent strips are connected by at least one of the following methods: gluing, welding, sewing, and attachment by a connector.

14. The flexible circuit board according to claim 1, characterized in that, Of the multiple strip edges on both sides of the multiple strip portions along their extension direction, at least one of the strip edge edges is curved.

15. The flexible circuit board according to claim 1, characterized in that, The base portion and the plurality of strip portions are an integral structural component.

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