WO2019080006A1 - 柔性电路板及电子装置 - Google Patents
柔性电路板及电子装置Info
- Publication number
- WO2019080006A1 WO2019080006A1 PCT/CN2017/107664 CN2017107664W WO2019080006A1 WO 2019080006 A1 WO2019080006 A1 WO 2019080006A1 CN 2017107664 W CN2017107664 W CN 2017107664W WO 2019080006 A1 WO2019080006 A1 WO 2019080006A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit board
- flexible circuit
- groove
- board according
- electronic module
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
Definitions
- the present invention relates to a flexible circuit board, and more particularly to a torsion-resistant flexible circuit board and an electronic device using the same.
- Flexible Printed Circuit is widely used in electronic devices to connect electronic components or modules because of its high wiring density, light weight, thin thickness and good bending properties.
- FPC Flexible Printed Circuit
- a flexible circuit board for connecting a plurality of electronic modules including:
- the fixing portion is a portion of the flexible circuit board fixed to the electronic module
- connecting portion being a portion of the flexible circuit board between the electronic modules
- the fixing portion and the connecting portion each include a substrate and a protective film, the substrate extending in a first direction, the substrate including a first surface and a second surface facing away from each other, the protective film covering the Describe the first surface and the second surface;
- At least one groove is formed in the base of the connecting portion, and the groove extends through the first surface and the second surface.
- the substrate is substantially rectangular, and the first direction is the length of the rectangle direction.
- the extending direction of the groove is substantially parallel to the first direction.
- the number of the grooves is plural, and the extending directions of the plurality of grooves are substantially parallel.
- the number of the grooves is plural, and are spaced apart on the substrate along the first direction.
- the groove includes a groove extending in the second direction and a groove extending in the third direction, the second direction being non-parallel to the third direction.
- the angle between the second direction and the third direction ranges from 10° to 90°.
- the second direction is substantially parallel to the first direction
- the third direction is substantially perpendicular to the first direction
- the groove extending in the second direction intersects the groove extending in the third direction.
- the groove extending in the second direction does not intersect the groove extending in the third direction.
- the groove is filled with a flexible filler.
- the filler is silica gel.
- the groove is substantially rectangular and has a longitudinal direction substantially parallel to the first direction.
- the groove has a width of 0.3 to 5 mm.
- An electronic device includes a first electronic module and a second electronic module, wherein the first electronic module is movable relative to the second electronic module, and the first electronic module and the second electronic module are connected through a flexible circuit board
- the flexible circuit board is the flexible circuit board described above.
- the electronic device is a laser radar or a laser range finder.
- the first electronic module is a light receiving module
- the second electronic module is a light emitting module
- the flexible circuit board and the electronic device are provided with a groove thereon, and when the flexible circuit board is subjected to a lateral twisting force, deformation can be performed at the groove to weaken or avoid lateral twisting force. Damaged.
- FIG. 1 is a schematic structural view of a flexible circuit board according to an embodiment of the present invention.
- FIG. 2 is a schematic view showing the structure of a flexible circuit board according to another embodiment of the present invention.
- FIG. 3 is a partial schematic structural view of an electronic device according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of an electronic module moving relative to each other according to an embodiment of the present invention.
- a component when referred to as being “fixed” to another component, it can be directly on the other component or the component can be present.
- a component When a component is considered to "connect” another component, it can be directly connected to another component or possibly a central component.
- a component When a component is considered to be “set to” another component, it can be placed directly on another component or possibly with a centered component.
- the terms “vertical,” “horizontal,” “left,” “right,” and the like, as used herein, are for illustrative purposes only.
- Flexible circuit board also known as "FPC flexible board” is a printed circuit made of flexible insulating substrate. It is mainly used in the connection parts of electronic products, such as mobile phone cable, LCD module, laser radar photoelectric module.
- the flexible circuit board includes a flexible substrate made of a material such as polyimide or polyester film, and a copper foil layer provided on the flexible substrate by a transparent adhesive such as polyethylene or epoxy resin.
- the copper foil layer is etched to form a circuit, and the circuit includes pads and leads.
- the copper foil layer is also covered with a protective layer to further increase the rigidity of the flexible circuit board. Since the flexible circuit board substrate is a soft board, it has flexibility.
- the flexible circuit board is typically connected to the electronic module of the electronic device by soldering to enable electrical connection of the two electronic modules of the electronic device. If the two electronic modules need to move relative to each other during the operation of the electronic device, the flexible circuit board connecting the two electronic modules is subjected to the twisting force caused by the relative movement. In order to avoid damage to the flexible circuit board due to the twisting force, the flexible circuit board is usually reduced by increasing the redundancy of the conductor distribution on the flexible circuit board or increasing the line width.
- the flexible circuit board of the present disclosure has a groove formed thereon, and when the flexible circuit board is subjected to a twisting force, deformation can be performed at the groove. Thereby reducing or eliminating the adverse effects caused by the twisting force.
- FIG. 1 and FIG. 2 are schematic structural diagrams of a flexible circuit board 1 according to an embodiment of the present invention.
- the flexible circuit board 1 includes a connecting portion 10 and a fixing portion 11, and the fixing portion 11 includes a first end 12 and a second end 14 which are oppositely disposed, and the first end 12 and the second end 14 are respectively located at the The extending direction (first direction) of the substrate 13 is described.
- the first end 12 and the second end 14 are electrically connected to two electronic modules, respectively.
- the fixing portion 11 is used to connect an electronic module and is connected to the electronic module by soldering or the like.
- the connecting portion 10 is a flexible circuit board portion disposed between the electronic modules for connecting the first end 12 and the second end 14.
- the connecting portion 10 and the fixing portion 11 of the flexible circuit board 1 each include a base material 13 and a protective film 15.
- the base material 13 has a substantially rectangular shape and extends in the first direction (the longitudinal direction of the rectangle). It can be understood that in other embodiments, the shape of the substrate 13 may be any other suitable shape, such as a T shape, an L shape/gate shape, or the like.
- the substrate 13 includes a first surface 131 and a second surface 132 opposite the first surface 131.
- the protective film 15 covers the first surface 131 and the second surface 132.
- the shape of the substrate 13 can be set to a specific shape according to the connection needs. For convenience of description, in the following embodiments, a rectangular base material 13 will be described as an example.
- the connecting portion 10 defines a recess 16 extending through the first surface 131 and the second surface 132.
- the recess 16 is substantially rectangular and extends in a direction substantially parallel to the first direction.
- the number of the grooves 16 may be plural, and the plurality of grooves 16 are parallel to each other.
- the fixing portion 11 is not provided with the groove 16.
- the substrate 13 is divided into a plurality of branches 100 by the grooves 16, and the wires of the flexible circuit board 1 pass through one or more of the branches 100. line. That is, the wires of the flexible circuit board 1 may be routed in all of the branches 100, or may be routed only in one or a part of the branches 100.
- the wire of the flexible circuit board 1 is routed through a branch that is closest to the side of the flexible circuit board.
- the branch traces closest to the left and/or right side of the flexible circuit board 1 are routed. This type of wiring can further improve the anti-twist ability and anti-electromagnetic interference capability of the wire.
- the wires of the flexible circuit board 1 are routed in the plurality of branches. That is, only one branch of each of the two adjacent branches is routed. Interval traces increase the resistance to electromagnetic interference between the wires.
- the number of the grooves 16 may also be one.
- the shape of the groove 16 may also be other shapes, such as an S-shaped curve.
- the groove 16 may further include a first groove extending in the second direction and a second groove extending in the third direction, the second direction and the first The three directions are not parallel.
- first groove and the second groove may intersect, and the plurality of the first groove and the second groove may intersect in a mesh shape.
- the angle between the second direction and the third direction may be between 10 degrees and 90 degrees, such as 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees. 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees, 90 degrees, and the like.
- first groove and the second groove may also not intersect, for example, the first groove is a groove disposed parallel to the first direction, and is disposed at Between the first end 12 and the second end 14; the second groove is a transverse groove perpendicular to the first direction, disposed adjacent to the first end 12 or the second end 14.
- the number of the grooves 16 when the number of the grooves 16 is plural, they may also be spaced apart along the first direction of the substrate 13 . At this time, the first groove and the second groove may be disposed at intervals.
- the recess 16 may be filled with a flexible material, which may be a silicone rubber or a flexible plastic or an elastic metal material or the like.
- the width of the groove 16 can preferably be set to 0.3-5 mm.
- the width of the groove can also be adaptively adjusted according to actual needs.
- the spacing between adjacent grooves is preferably greater than or equal to the width of the grooves.
- a protective film may be disposed on the substrate 13 of the flexible circuit board 1 , and the protective film may not have a groove. It can be understood that in some embodiments, the protective film can also be A groove is formed corresponding to the groove 16 .
- the flexible circuit board 1 can be applied to various electronic devices, such as a mobile phone, a tablet, a notebook, a desktop computer, a laser radar, a laser range finder, etc., since the flexible circuit board 1 is provided with the groove 16, the side thereof The torsional resistance is greatly improved. If the two electronic modules connected to each other through the flexible circuit board 1 move relative to each other during the operation of the electronic device, the lateral torsion resistance of the flexible circuit board 1 can be greatly enhanced.
- FIG. 3 is a partial block diagram of an exemplary electronic device 2 .
- the electronic device 2 includes a first electronic module 20 and a second electronic module 22, and a flexible circuit board 24 connecting the first electronic module 20 and the second electronic module 22.
- the flexible circuit board 24 can adopt the structure of the flexible circuit board 1 in the embodiment of FIG. 1 , and includes a first end 240 , a second end 242 , and a first end 240 and a second end 242 .
- the first electronic module 20 is movable in a three-dimensional direction with respect to the second electronic module 22, such as movement in three directions of X, Y, and Z shown in the drawing.
- the flexible circuit board 24 will receive a lateral twisting force (as shown in FIG. 4).
- the lateral twisting force may damage the fixed portion of the flexible circuit board 24 and the first electronic module 20 or the second electronic module 22 (ie, the first end 240 and the The second end 242) or damages the wire within the flexible circuit board 24.
- the flexible circuit board 24 of the present disclosure is provided with the recess 244, when the flexible circuit board 24 is subjected to a lateral twisting force, the flexible circuit board 24 can be deformed at the recess 244, and is weakened. A twisting force acting on the wire portion of the connecting portion or the flexible circuit board 24, thereby enhancing the torsional resistance of the flexible circuit board 24.
- the electronic device 2 is a laser radar or a range finder
- the first electronic module may be a light receiving module
- the second module may be a light emitting module or a lens
- the light receiving module is in a working process. It is necessary to constantly adjust the position to ensure that the photosensitive surface of the photoelectric device is near the focus of the lens and corresponds to the laser emission position to obtain the best optical signal receiving effect when the light receiving module is in the X and Y directions with respect to the second module.
- the flexible circuit board 24 can be bent to support the movement of the light receiving module in the X and Y directions, and the movement in the Z direction is Grooves are provided on the flexible circuit board 24 to achieve lateral distortion.
- the flexible circuit board is formed by interconnecting a plurality of small flexible circuit boards, each of which is substantially strip-shaped or bent into a specific shape according to a layout. At this time, at least one groove may be disposed at a bend of each small flexible circuit board to improve the bending resistance of the bending portion, and at least one of the plurality of small flexible circuit boards is opened on the flexible circuit board. The groove.
- the groove described above is a groove penetrating through the lower surface of the flexible circuit board.
- the groove may also be disposed not to penetrate the groove of the flexible circuit board, that is, The recess is formed on any surface of the flexible circuit board.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Structure Of Printed Boards (AREA)
Abstract
一种柔性电路板（1，24），用于连接电子模块（20，22），所述柔性电路板（1，24）包括：固定部（11），所述固定部（11）为所述柔性电路板（1，24）固定连接于所述电子模块（20，22）上的部分；连接部（10），所述连接部（10）为所述柔性电路板（1，24）的位于所述电子模块（20，22）之间的部分；所述固定部（11）和所述连接部（10）均包括基材（13）和保护膜（15），所述基材（13）沿第一方向延伸，所述基材（13）包括相互背离的第一表面（131）和第二表面（132），所述保护膜（15）覆盖于所述第一表面（131）和第二表面（132）；所述基材（13）上开设有至少一凹槽（16），所述凹槽（16）贯穿所述第一表面（131）和所述第二表面（132）。还提供一种电子装置（2）。所述柔性电路板（1，24）及电子装置（2）上设置有凹槽（16），能够提升柔性电路板（1，24）的抗扭曲能力。
Description
本发明涉及一种柔性电路板，尤其涉及一种抗扭柔性电路板及采用该柔性电路板的电子装置。
柔性电路板(Flexible Printed Circuit，FPC)因其具有配线密度高、重量轻、厚度薄、弯折性好的特点而被广泛应用在电子装置中连接电子元器件或模块。当用来连接的两个电子元器件模块在运行过程中需要相互移动时，特别是侧向移动时，造成对所述柔性电路板的侧向扭力，所述侧向扭曲力易造成柔性电路板与电子元器件模块的连接部分脱落或损坏，或损坏到柔性电路板的线材。
发明内容
有鉴于此，有必要提供一种能够解决上述问题的柔性电路板及采用该柔性电路板的电子装置。
一种柔性电路板，用于连接多个电子模块，包括：
固定部，所述固定部为所述柔性电路板固定于所述电子模块上的部分；
连接部，所述连接部为所述柔性电路板的位于所述电子模块之间的部分；
所述固定部和所述连接部均包括基材和保护膜，所述基材沿第一方向延伸，所述基材包括相互背离的第一表面和第二表面，所述保护膜覆盖于所述第一表面和第二表面；
所述连接部的基材上开设有至少一凹槽，所述凹槽贯穿所述第一表面和所述第二表面。
进一步地，所述基材大致呈长方形，所述第一方向为所述长方形的长度
方向。
进一步地，所述凹槽的延伸方向与所述第一方向大致平行。
进一步地，所述凹槽的数量为多个，且多个凹槽的延伸方向大致平行。
进一步地，所述凹槽的数量为多个，沿所述第一方向在所述基材上间隔设置。
进一步地，所述凹槽包括沿第二方向延伸的凹槽及沿第三方向延伸的凹槽，所述第二方向与第三方向不平行。
进一步地，所述第二方向与所述第三方向的夹角范围为10°-90°。
进一步地，所述第二方向与所述第一方向大致平行，第三方向与所述第一方向大致垂直。
进一步地，沿所述第二方向延伸的凹槽与沿所述第三方向延伸的凹槽相交。
进一步地，沿所述第二方向延伸的凹槽与沿所述第三方向延伸的凹槽不相交。
进一步地，所述凹槽中填充有柔性填充物。
进一步地，所述填充物为硅胶。
进一步地，所述凹槽大致呈长方形，其长度方向大致平行于所述第一方向。
进一步地，所述凹槽的宽度为0.3-5毫米。
进一步地，所述固定部包括两接口，分别用于连接两电子模块，所述两接口分别设置在所述连接部两相对端，所述两相对端分别位于所述基材的长度方向上。
一种电子装置，包括第一电子模块及第二电子模块，所述第一电子模块能够相对所述第二电子模块移动，所述第一电子模块与所述第二电子模块通过柔性电路板连接，所述柔性电路板为上所述的柔性电路板。
进一步地，所述电子装置为激光雷达或激光测距仪。
进一步地，所述第一电子模块为光接收模块，所述第二电子模块为光发射模块。
所述柔性电路板及电子装置在其上开设有凹槽，在所述柔性电路板受到侧向扭曲力时能够在所述凹槽处发生变形以减弱或避免侧向扭曲力可能造
成的损坏。
图1是本发明一实施例的柔性电路板的结构示意图。
图2是本发明一实施例的柔性电路板另一视角的结构示意图。
图3是本发明一实施例的电子装置的部分结构示意图。
图4是本发明一实施例的电子模块相互移动的示意图。
主要元件符号说明
如下具体实施方式将结合上述附图进一步说明本发明。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做
出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，当组件被称为“固定于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“连接”另一个组件，它可以是直接连接到另一个组件或者可能同时存在居中组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。其中，本发明实施例结合示意图进行详细描述，在详述本发明实施例时，为便于说明，表示器件结构的剖面图会不依一般比例作局部放大，而且所述示意图只是示例，其在此不应限制本发明保护的范围。
柔性电路板又称“FPC柔性板”，是用柔性的绝缘基材制成的印刷电路，主要应用于电子产品的连接部位，比如手机排线，液晶模组、激光雷达的光电模块等。通常柔性电路板包括以聚酰亚胺或聚酯薄膜等材料制成的软性基材，通过聚乙烯或环氧树脂等透明胶设置在所述软性基材上的铜箔层，在所述铜箔层上进行蚀刻形成电路，电路包括焊盘及引线。铜箔层上还覆盖有保护层以进一步提升柔性电路板的刚性。由于柔性电路板基材为软板，故具有挠性。柔性电路板通常通过焊接与电子装置的电子模块相连接以实现电连接电子装置的两个电子模块。若两个电子模块在电子装置的运行过程中需要相对移动，则连接两个电子模块的柔性电路板会受到相对移动带来的扭曲力。为避免柔性电路板因扭曲力受到损坏，通常是通过增加柔性电路板上导线分布的冗余或者增大导线线宽以减小柔性电路板，然而，若柔性电路板受到的扭曲力为其宽度方向的(即侧向的)，柔性电路板与电子装置的电子模块的连接部位首先会受到扭曲力，柔性电路板上的线材也会受到同方向的扭曲
力，为了避免这种扭曲力对所述柔性电路板造成的不良影响，本揭露的柔性电路板在其上开设凹槽，当柔性电路板受到扭曲力时，能够在所述凹槽处发生形变从而减弱或消除扭曲力造成的不良影响。
请参阅图1及图2所示，为本发明一实施例的柔性电路板1的结构示意图。所述柔性电路板1包括连接部10和固定部11，所述固定部11包括相对设置的第一端12和第二端14，所述第一端12和所述第二端14分别位于所述基材13的延伸方向(第一方向)上。所述第一端12和所述第二端14分别电连接两电子模块。在一些实施例中，所述固定部11用于连接电子模块，且通过焊接等方式与电子模块连接。所述连接部10为设置在所述电子模块之间的柔性电路板部分，用于连接所述第一端12和所述第二端14。
所述柔性电路板1的连接部10和固定部11均包括基材13和保护膜15。所述基材13大致呈长方形，沿第一方向(长方形的长度方向)延伸。可以理解的是，在其他实施例中，所述基材13的形状可以为其他任意适宜的形状，例如T形，L形/门形等弯折形等。所述基材13包括第一表面131和与所述第一表面131相背的第二表面132。所述保护膜15覆盖于所述第一表面131和所述第二表面132。在实际应用中，所述基材13的形状可根据连接需要设置成特定形状。为便于描述，下述实施例中，以长方形的基材13为例进行说明。
所述连接部10上开设有贯穿所述第一表面131和所述第二表面132的凹槽16，所述凹槽16大致呈长方形，其延伸方向与所述第一方向大致平行。所述凹槽16的数量可以为多个，多个凹槽16之间相互平行。所述固定部11不设置所述凹槽16。
所述凹槽16的数量为多个时，所述基材13被所述凹槽16划分为多条支路100，所述柔性电路板1的线材通过其中的一条或多条支路100走线。即，所述柔性电路板1的线材可在所有支路100中均走线，也可仅在其中的一条或部分支路100中走线。
在一些实施例中，所述柔性电路板1的线材通过最靠近所述柔性电路板侧边的支路走线。例如，最靠近所述柔性电路板1左侧及/或右侧的支路走线。此种走线方式可进一步提升线材的抗扭曲能力及抗电磁干扰能力。
在一些实施例中，所述柔性电路板1的线材在所述多条支路中间隔走线。
即每相邻的两条支路中只有一条支路走线。间隔走线可提高线材之间的抗电磁干扰能力。
可以理解的是，在其他实施例中，所述凹槽16的数量也可以为一个。
可以理解的是，在其他实施例中，所述凹槽16的形状也可以是其他形状，例如S形等曲线形。
可以理解的是，在其他实施例中，所述凹槽16还可以包括沿第二方向延伸的第一凹槽和沿第三方向延伸的第二凹槽，所述第二方向与所述第三方向不平行。
可以理解的是，在一些实施例中，所述第一凹槽和所述第二凹槽可相交，多个所述第一凹槽和所述第二凹槽可以相交呈网状。所述第二方向与所述第三方向之间的夹角可为10度到90度之间，例如10度、15度、20度、25度、30度、35度、40度、45度、50度、55度、60度、65度、70度、75度、80度、85度、90度等。
可以理解的是，在其他实施例中，所述第一凹槽和所述第二凹槽也可以不相交，例如，第一凹槽为平行于所述第一方向设置的凹槽，设置在所述第一端12和所述第二端14之间；第二凹槽为垂直于所述第一方向的横向凹槽，靠近所述第一端12或所述第二端14设置。
可以理解的是，所述凹槽16的数量为多个时，也可以沿所述基材13的第一方向间隔设置。此时，所述第一凹槽和所述第二凹槽可以间隔交叉设置。
可以理解的是，为进一步增加所述柔性电路板1的柔性及抗扭性，还可以在所述凹槽16中填充柔性材料，所述柔性材料可为硅胶或柔性塑胶或弹性金属材料等。
可以理解的是，过窄的凹槽所能提供的变形空间有限，过宽的凹槽会减弱柔性电路板的刚性，因此，所述凹槽16的宽度优选地可设置为0.3-5毫米，例如0.5毫米、0.6毫米、0.7毫米、0.8毫米、0.9毫米、1毫米、2毫米、3毫米、4毫米等。可以理解的是，所述凹槽的宽度也可根据实际需要进行适应性调整。所述凹槽16的数量为多个时，相邻凹槽之间的间距优选地大于等于所述凹槽的宽度。
可以理解的是，所述柔性电路板1的基材13上还可设置保护膜，所述保护膜可不开设凹槽。可以理解的是，在一些实施例中，所述保护膜也可在
对应所述凹槽16处开设凹槽。
所述柔性电路板1可应用于各种电子装置，例如手机、平板、笔记本、桌面计算机、激光雷达、激光测距仪等，由于所述柔性电路板1设置有所述凹槽16，其侧向抗扭性大大提升，若在电子装置运作过程中，通过所述柔性电路板1相互连接的两电子模块相互移动，能大大增强所述柔性电路板1的侧向抗扭能力。
请参阅图3所示，为一种例示的电子装置2的部分模块示意图。所述电子装置2包括第一电子模块20及第二电子模块22，及连接所述第一电子模块20和所述第二电子模块22的柔性电路板24。所述柔性电路板24可采用图1的实施例中的柔性电路板1的结构，包括第一端240、第二端242，及开设在所述第一端240和所述第二端242之间的凹槽244。可以理解的是，上述对柔性电路板1的具体描述，包括对其第一端12、第二端14及凹槽16的所有描述均适用于柔性电路板24及其第一端240、第二端242及凹槽244，在此不再赘述。
所述第一电子模块20可相对所述第二电子模块22在三维方向上移动，例如图中所示的X、Y、Z三个方向上的移动。当所述第一电子模块20相对所述第二电子模块22向Y轴移动时，所述柔性电路板24将受到侧向的扭曲力(如图4所示)，此时，若采用普通的柔性电路板，则该侧向的扭曲力可能会损坏所述柔性电路板24与所述第一电子模块20或所述第二电子模块22的固定部(即所述第一端240和所述第二端242)，或损坏所述柔性电路板24内的线材。由于本揭露中的柔性电路板24上设置有所述凹槽244，所述柔性电路板24受到侧向的扭曲力时，所述柔性电路板24可在所述凹槽244处产生形变，减弱作用在所述连接部分或所述柔性电路板24内的线材部分的扭曲作用力，从而提升所述柔性电路板24的抗扭能力。
在一实施例中，所述电子装置2为激光雷达或测距仪，所述第一电子模块可为光接收模块，第二模块可为光发射模块或透镜，所述光接收模块在工作过程中需要不断调整位置以保证光电器件感光面在透镜的焦点附近并与激光发射位置对应，以获得最好的光信号接收效果，当所述光接收模块相对所述第二模块在X、Y方向上移动时，所述柔性电路板24可以弯折来支持所述光接收模块在X、Y方向上的移动，而在Z方向上的移动，则通过所述
柔性电路板24上设置的凹槽来实现对抗侧向的扭曲。
在一些实施例中，所述柔性电路板由多个小柔性电路板相互连接而成，每一小柔性电路板均大致呈条状，或根据布局需要弯折成特定形状。此时，可以在每一小柔性电路板的弯折处设置至少一凹槽，以提升弯折处的抗弯折性，同时在多个小柔性电路板中的至少一柔性电路板上开设上所述的凹槽。
可以理解的是，上所述的凹槽为贯穿所述柔性电路板上下表面的凹槽，在其他实施例中，所述凹槽也可以设置成不贯穿所述柔性电路板的凹槽，即所述凹槽开设在所述柔性电路板上任一表面上。
另外，对于本领域的普通技术人员来说，可以根据本发明的技术构思做出其它各种相应的改变与变形，而所有这些改变与变形都应属于本发明权利要求的保护范围。
Claims (22)
- 一种柔性电路板，用于连接电子模块，其特征在于，所述柔性电路板包括：固定部，所述固定部为所述柔性电路板固定连接于所述电子模块上的部分；连接部，所述连接部为所述柔性电路板的位于所述电子模块之间的部分；所述固定部和所述连接部均包括基材和保护膜，所述基材沿第一方向延伸，所述基材包括相互背离的第一表面和第二表面，所述保护膜覆盖于所述第一表面和第二表面；所述连接部的基材上开设有至少一凹槽，所述凹槽贯穿所述第一表面和所述第二表面。
- 如权利要求1所述的柔性电路板，其特征在于，所述基材大致呈长方形，所述第一方向为所述长方形的长度方向。
- 如权利要求1所述的柔性电路板，其特征在于，所述凹槽的延伸方向与所述第一方向大致平行。
- 如权利要求1所述的柔性电路板，其特征在于，所述凹槽的数量为多个，且多个凹槽的延伸方向大致平行。
- 如权利要求1所述的柔性电路板，其特征在于，所述凹槽的数量为多个，沿所述第一方向在所述基材上间隔设置。
- 如权利要求5所述的柔性电路板，其特征在于，所述基材被所述凹槽划分为多条支路，所述柔性电路板的线材通过其中的一条或多条支路走线。
- 如权利要求6所述的柔性电路板，其特征在于，所述柔性电路板的线材通过最靠近所述柔性电路板侧边的支路走线。
- 如权利要求6所述的柔性电路板，其特征在于，所述柔性电路板的线材在所述多条支路中间隔走线。
- 如权利要求1所述的柔性电路板，其特征在于，所述凹槽包括沿第二方向延伸的凹槽及沿第三方向延伸的凹槽，所述第二方向与第三方向不平行。
- 如权利要求9所述的柔性电路板，其特征在于，所述第二方向与所述第三方向的夹角范围为10°-90°。
- 如权利要求9所述的柔性电路板，其特征在于，所述第二方向与所述第一方向大致平行，第三方向与所述第一方向大致垂直。
- 如权利要求9所述的柔性电路板，其特征在于，沿所述第二方向延伸的凹槽与沿所述第三方向延伸的凹槽相交。
- 如权利要求9所述的柔性电路板，其特征在于，沿所述第二方向延伸的凹槽与沿所述第三方向延伸的凹槽不相交。
- 如权利要求1所述的柔性电路板，其特征在于，所述凹槽中填充有柔性填充物。
- 如权利要求14所述的柔性电路板，其特征在于，所述填充物为硅胶。
- 如权利要求1所述的柔性电路板，其特征在于，所述凹槽大致呈长方形，其长度方向大致平行于所述第一方向。
- 如权利要求16所述的柔性电路板，其特征在于，所述凹槽的宽度为0.3-5毫米。
- 如权利要求1所述的柔性电路板，其特征在于，所述固定部包括两接口，分别用于连接两电子模块，所述两接口分别设置在所述基材两相对端，所述两相对端分别位于所述基材的长度方向上。
- 如权利要求1所述的柔性电路板，其特征在于，所述保护膜不相应开设槽。
- 一种电子装置，包括第一电子模块及第二电子模块，所述第一电子模块能够相对所述第二电子模块移动，所述第一电子模块与所述第二电子模块通过柔性电路板连接，其特征在于，所述柔性电路板为权利要求1-21任一项所述的柔性电路板。
- 如权利要求20所述的电子装置，其特征在于，所述电子装置为激光雷达或激光测距仪。
- 如权利要求20所述的电子装置，其特征在于，所述第一电子模块为光接收模块，所述第二电子模块为光发射模块。
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