FPC (Flexible Printed Circuit) flat cable, camera module and endoscope

Abstract

The FPC flat cable comprises a cable body, a first bonding pad, a second bonding pad, a third bonding pad and a fourth bonding pad, the cable body comprises a main body part, a base body part and an extension part, a first circuit structure is arranged in the cable body, the outside of the cable body is connected with a second circuit structure, and the extension part can be bent relative to the base body part. The first bonding pad is vertical to the second bonding pad; part of the base body part can be bent relative to the main body part, so that the third bonding pad and the fourth bonding pad face the same direction. According to the FPC flat cable, the cable with the low shielding requirement is arranged inside, the cable with the high shielding requirement is arranged outside for welding, the first circuit structure is used for supplying power to a camera and an LED device at the head end of an endoscope, the second circuit structure is used for transmitting clock signals, a data annunciator and the like, the cables are distinguished according to the shielding requirement, and the shielding requirement is met. And shielding setting is facilitated. The camera module and the endoscope which are connected by adopting the FPC flat cable also have the above advantages.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an FPC cable, a camera module and an endoscope. Background Art

[0002] An endoscope is a commonly used medical device that can be inserted into a body cavity for observation. It usually includes a bendable snake bone, a handheld portion, and a head portion arranged at the front end of the snake bone. The head portion is used to insert into a body cavity. A camera is provided at the head portion, and an LED lighting device is provided. The handheld portion and an external device are connected via a signal transmission line to realize image acquisition. The position and orientation of the head portion are operated by bending the snake bone to realize observation of the cavity. The handheld portion is connected to the camera and the LED lighting device via a transmission line, and is used to operate the camera and the LED lighting device externally.

[0003] At present, in endoscopes with LED lighting at the head end, the camera and LED devices are mostly made of multiple coaxial lines combined into one line, and the camera module line and LED light line are integrated into the same cable to achieve the connection between the endoscope front-end device and the handle, and the cable has a high integrity. However, there are at least the following problems in actual application: First, after the camera module line and the LED light line are integrated, the overall diameter of the cable is relatively large, which directly affects the bending effect of the snake bone part during use, affects the operation accuracy, and also causes an increase in the pulling force of the traction system; secondly, in the manufacturing process, LED devices / camera modules and cables are generally connected by brazing, but based on the development requirements of miniaturization of endoscopes, the size of the front end and components is small. Limited by the size of the components and the size of the front end, the size of the welding point is extremely small and the spacing between the welding points is close, which greatly increases the difficulty of brazing and welding, thereby affecting the reliability of the connection, low welding efficiency and low yield;

[0004] Among all the cables at the head end, some cables, such as camera chip power supply and LED light cables, have low shielding requirements, while some cables, such as clock signals and data signals, have high shielding requirements. Currently, all of them are combined into one cable, which is difficult to distinguish in terms of signal shielding and packaging. Utility Model Content

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an FPC cable, which is provided with an internal first circuit structure and an externally connected second circuit structure, wherein cables with low shielding requirements are arranged inside, and cables with high shielding requirements are arranged outside for welding, wherein the first circuit structure is used to power the camera and LED devices at the end of the endoscope head, and the second circuit structure is used to transmit clock signals, data signals, etc. The cables are distinguished according to the shielding requirements, which facilitates the subsequent shielding settings and avoids some existing defects. The present application also proposes a camera module and an endoscope having the FPC cable.

[0006] According to some embodiments of the present application, an FPC cable includes:

[0007] The wire body has a front side and a back side, and has a first circuit structure inside and is connected to a second circuit structure outside. The wire body includes a main body, a base and an extension. The base is connected to one end of the main body, and the extension is connected to an edge of the base.

[0008] A first pad is disposed on the front side of the base portion and connected to the first circuit structure;

[0009] A second pad is disposed on the front side of the extension portion and connected to the first circuit structure;

[0010] a third pad, disposed on the front surface of the base portion and connected to the second circuit structure;

[0011] a fourth pad, disposed on the reverse side of the main body and connected to the second circuit structure;

[0012] Wherein, the extension portion can be bent relative to the base portion, and the first pad and the second pad are oriented perpendicularly;

[0013] A portion of the base portion can be bent relative to the main body portion so that the third pad and the fourth pad face the same direction.

[0014] The FPC cable of the first embodiment of the present application has at least the following beneficial effects: the FPC cable sets the first internal circuit structure and the second externally connected circuit structure, sets the cables with low shielding requirements inside, and sets the cables with high shielding requirements outside for welding. The first circuit structure is used to power the camera and LED devices at the end of the endoscope lens, and the second circuit structure is used for the transmission of clock signals, data signals, etc. The cables are distinguished according to the shielding requirements, which is convenient for subsequent shielding settings. At the same time, it can be understood that the use of FPC to replace the cable reduces the volume, and the connection between the pads on the FPC cable and the camera and LED devices can be achieved through the reflow soldering process commonly used in the circuit board welding process. The welding process is simple and the connection is reliable, thereby solving the problem of difficult operation and poor connection reliability of the existing solution of soldering cables by brazing.

[0015] According to some embodiments of the FPC cable of the present application, the base portion has a set length, and the base portion includes a first section and a second section along the length direction, the first section is connected to the main body portion, the second section is connected to an end of the first section away from the main body portion, the first solder pad is located on the front side of the first section, and the third solder pad is located on the front side of the second section, wherein the second section can be bent relative to the main body portion.

[0016] According to some embodiments of the FPC cable of the present application, the number of the extension parts is two, the two extension parts are respectively connected to the opposite side edges of the first section, and extend in directions away from each other for a set length, and the second solder pad is located on the edge of the extension part away from the base part.

[0017] According to some embodiments of the FPC cable of the present application, the main body includes a front end and a rear end, the front end is connected to the base portion, and the rear end is far away from the base portion, the front end can be bent relative to the base portion, and the bending direction of the front end is opposite to the bending direction of the second section, so that the bent second section is close to the main body.

[0018] According to some embodiments of the FPC cable of the present application, the reverse side of the first section, the reverse side of the second section, and the front side of the rear end are respectively provided with a first reinforcement layer, a second reinforcement layer, and a third reinforcement layer, and the shapes of the first reinforcement layer, the second reinforcement layer, and the third reinforcement layer are respectively the same as the shapes of the first section, the second section, and the rear end.

[0019] According to the FPC cables of some embodiments of the present application, a metal reinforcement layer is further provided on the reverse side of the main body, and a connector pad is provided on the front side of the metal reinforcement layer. The connector pad is respectively connected to the first circuit structure and the second circuit structure.

[0020] According to some embodiments of the FPC cable of the present application, the cable body includes a base material layer, an inner insulating layer, a shielding layer and an outer insulating layer, the first circuit structure includes a camera circuit and an LED circuit, the first circuit structure is arranged on the base material layer, and the inner insulating layer, the shielding layer and the outer insulating layer are sequentially stacked on both sides of the base material layer.

[0021] According to some embodiments of the FPC cables of the present application, the second circuit structure includes a plurality of coaxial lines, and the coaxial lines include, from the inside to the outside, a center conductor, an internal insulation layer, an internal shielding layer, and an external insulation layer; some layers of the coaxial lines are stripped, and from one end to the midpoint of the coaxial line in the length direction, there are the center conductor, the internal insulation layer, the internal shielding layer, and the external insulation layer exposed to the outside, and from the other end to the midpoint in the length direction, there are the center conductor, the internal insulation layer, the external insulation layer, the internal shielding layer, and the external insulation layer exposed to the outside, and each section of the center conductor, the internal insulation layer, the internal shielding layer, and the external insulation layer along the length direction has a set length.

[0022] According to the FPC cable of some embodiments of the present application, the third pad and the fourth pad each include a center conductor pad and a shielding layer pad, and the center conductor pad and the shielding layer pad are welded to the center conductor and the insulating layer, respectively.

[0023] The camera module according to the second aspect of the present application includes the above-mentioned FPC cable;

[0024] A camera connected to the first pad and electrically connected to the first circuit structure;

[0025] an LED device connected to the second pad and electrically connected to the first circuit structure;

[0026] The extension portion is bent relative to the base portion, and the LED device is perpendicular to the direction of the camera, and the working surface of the camera and the light-emitting surface of the LED device are in the same direction;

[0027] Two ends of the second circuit structure are connected to the third pad and the fourth pad respectively.

[0028] The camera module of the second embodiment of the present application has at least the following beneficial effects: the FPC cable of the first embodiment is adopted, the camera is connected to the first pad on the FPC cable, and the LED device is connected to the second pad on the FPC cable. The FPC cable is provided with the first pad on the base portion, which can not only reduce the circuit volume, but also simplify the welding process, improve the reliability of the connection, and thus improve the connection efficiency. The camera and the LED device are oriented vertically by bending the extension portion, and the end-emitting LED device is adopted so that the working surface of the camera and the light-emitting surface of the LED device are oriented in the same direction, and the structure is simple. The two ends of the second circuit structure are respectively connected to the third pad and the fourth pad, specifically for transmitting clock signals, data signals, etc., which is convenient for subsequent shielding.

[0029] According to the camera module of some embodiments of the present application, the camera module further includes a heat shrink tube, which is sleeved outside the main body;

[0030] The welding sealant is respectively coated on the base portion, the extension portion and the outside of the fourth welding pad.

[0031] An endoscope according to an embodiment of a third aspect of the present application includes a head end portion having an accommodating cavity, wherein the head end portion is provided with a supporting portion in the accommodating cavity;

[0032] The camera module is arranged in the accommodating cavity, and the FPC cable is connected to the supporting part.

[0033] The endoscope of the third aspect embodiment of the present application has at least the following beneficial effects: the camera module of the second aspect embodiment can not only reduce the volume of the circuit, which is beneficial to the miniaturization of the endoscope, but also simplify the welding process, improve the reliability of the connection, and thus improve the connection efficiency. By setting the first circuit to power the camera and LED device at the end of the endoscope head, the second circuit structure is used to transmit clock signals, data signals, etc., and different cables are distinguished according to the degree of shielding requirements and importance, so as to facilitate subsequent shielding settings.

[0034] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the front structure of the FPC cable of an embodiment of the present application;

[0036] Figure 2 This is a schematic diagram of the reverse structure of the FPC cable of an embodiment of the present application;

[0037] Figure 3 A schematic diagram of a bending state of a portion of the FPC cable in an embodiment of the present application in a usage state;

[0038] Figure 4 for Figure 3 A schematic diagram of the structure of some FPC cables from another angle;

[0039] Figure 5 This is a schematic diagram of the structure of the FPC cable after bending according to an embodiment of the present application;

[0040] Figure 6 for Figure 5 A partial enlarged view of the middle A part;

[0041] Figure 7 for Figure 5 A partial enlarged view of the middle B part;

[0042] Figure 8 This is a schematic diagram of the structure after the FPC cable is bent and connected to the second circuit structure in an embodiment of the present application;

[0043] Fig. 9 for Figure 8 A partial enlarged view of the middle C part;

[0044] Fig.10 for Figure 8 A partial enlarged view of the middle D part;

[0045] Fig.11 This is a schematic cross-sectional view of a wire body in an embodiment of the present application;

[0046] Fig.12 This is a schematic structural diagram of a coaxial line according to an embodiment of the present application;

[0047] Fig.13 A schematic diagram of the exploded structure of a camera module according to an embodiment of the present application;

[0048] Fig.14 Schematic diagram of the structure of the camera module according to an embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the concept of the present application and the technical effects produced in combination with the embodiments, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present application.

[0050] In the description of the embodiments of the present application, if orientation descriptions are involved, the orientations or positional relationships indicated by "up", "down", "front", "back", "left", "right", etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or device referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0051] In the description of the embodiments of the present application, if a feature is referred to as being “set,” “fixed,” “connected,” or “installed” on another feature, it may be directly set, fixed, or connected to another feature, or it may be indirectly set, fixed, connected, or installed on another feature. In the description of the embodiments of the present application, if “several” is involved, it means more than one; if “multiple” is involved, it means more than two; if “greater than,” “less than,” or “exceeds” is involved, it should be understood as not including the number itself; if “above,” “below,” or “within” is involved, it should be understood as including the number itself. If “first” or “second” is involved, it should be understood as being used to distinguish technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0052] In current endoscopes, the camera module line and the LED light line are integrated into the same cable. The overall diameter of the cable is relatively large, which affects the bending effect of the snake bone part. In addition, the welding process of the camera and the LED light is complicated and difficult to operate, resulting in low welding efficiency, low yield, and poor reliability. At the same time, all cables are arranged in one cable, which makes it difficult to shield the cables. The embodiment of the present application proposes an FPC cable, as well as a camera module and an endoscope having the FPC cable. The FPC cable of the embodiment of the present application is used for connecting the camera and the LED device of the endoscope, which can effectively reduce the difficulty of connecting the camera and the LED device, improve the reliability of the connection, and reduce the space occupied. At the same time, different cables are arranged separately to facilitate subsequent shielding. The following is an introduction to the embodiment of the present application in conjunction with the drawings in the specification:

[0053] Figure 1 This is a schematic diagram of the front structure of the FPC cable of the embodiment of the present application. Figure 2 This is a schematic diagram of the reverse structure of the FPC cable of the embodiment of the present application. Figure 3 This is a schematic diagram of the FPC cable of the embodiment of the present application in a disassembled state with the camera and LED components in a use state, refer to Figures 1 to 3 In a first aspect, an embodiment of the present application provides an FPC cable 100, which is applied to a camera module of an endoscope. The FPC cable 100 includes a cable body 101, a first solder pad 105 and a second solder pad 106. The cable body 101 has a front side and a back side, and has a first circuit structure inside, which is used for connecting a camera 200 and an LED device 300 in an endoscope. The outside is connected with a second circuit structure, which is used for transmitting clock signals, data signals, etc.

[0054] The line body 101 includes a main body 102, a base 103 and an extension 104. The base 103 is connected to one end of the main body 102, and the extension 104 is connected to the edge of the base 103. The first pad 105 is arranged on the front of the base 103 and connected to the first circuit structure. The second pad 106 is arranged on the front of the extension 104 and connected to the first circuit structure. The extension 104 can be bent relative to the base 103 so that the second pad 106 and the first pad 105 are in the same direction and parallel to each other. The third pad 107 is arranged on the front of the base 103 and connected to the second circuit structure. The fourth pad 108 is arranged on the reverse side of the main body 102 and connected to the second circuit structure.

[0055] The extension part 104 can be bent relative to the base part 103, and the first pad 105 and the second pad 106 are oriented perpendicularly. Therefore, by setting the first pad 105 on the base part 103 and the second pad 106 on the extension part 104, when applied to the camera module of the endoscope, they can be used to connect the camera head 200 and the LED device 300, respectively. In this application, the end-emitting LED device 300 is used, so that the working surface of the camera head 200 and the illumination direction of the LED device 300 are parallel.

[0056] Part of the base portion 103 can be bent relative to the main body portion 102 so that the third pad 107 and the fourth pad 108 face the same direction. The third pad 107 and the fourth pad 108 are used to solder the second circuit structure. The third pad 107 and the fourth pad 108 are located on the front and back sides of the line body 101, respectively. By partially bending the base portion 103, the third pad 107 and the fourth pad 108 can be located in the same plane and direction, which can reduce the impact between the circuits and improve stability and safety.

[0057] In the above embodiment, the entire body 101 can be cut and formed by a cutting process, so that the base portion 103, the extension portion 104 and the main body 102 are a whole.

[0058] It is understandable that the above-mentioned FPC cable setting is adopted to divide the cables into a first line structure and a second line structure, and the cables are distinguished according to the shielding requirements. The cables with low shielding requirements are set inside, and the cables with high shielding requirements are set outside for welding. The first line structure is used to power the camera and LED devices at the end of the endoscope lens, and the second line structure is used for the transmission of clock signals, data signals, etc., which is convenient for subsequent shielding settings. At the same time, it is understandable that the use of FPC to replace cables reduces the volume, and the connection between the pads on the FPC cable and the camera and LED devices can be achieved through the reflow soldering process commonly used in the circuit board welding process. The welding process is simple and the connection is reliable, thereby solving the problem of difficult operation and poor connection reliability of the existing solution of soldering cables by brazing.

[0059] In some solutions that use FPC flexible circuit boards as transmission lines to connect the camera 200 and the LED device 300, the connection positions on the FPC flexible circuit board for connecting the camera 200 and the LED device 300 are in the same plane, so after the camera 200 and the LED device 300 are connected, the height difference between the LED device 300 and the front end of the camera 200 is too large, affecting the lighting effect, thereby affecting the observation or shooting effect of the camera 200. To solve this problem, some endoscopes are also provided with a light guide structure to make the light emitting surface flush with the front end of the camera 200 or have a suitable height difference, thereby improving the lighting effect, but this solution results in an increase in the number of components at the end of the endoscope and occupies space. The extension part 104 of the embodiment of the present application can be bent relative to the base part 103 so that the second pad 106 and the first pad 105 are perpendicular to each other, and the LED device 300 that emits light at the end is used, so that the working surface of the camera 200 and the lighting direction of the LED device 300 are parallel. Therefore, the extension part 104 in the present application only needs to be bent once to achieve the preset effect, and the structure is simple, which solves the problem of complex structure and numerous processes caused by the complex light guide structure set in many endoscopes at present. By setting the length of the extension part 104 and selecting a camera with an appropriate height, the positional relationship between the working surface of the camera 200 and the light-emitting surface of the LED device 300 can be set. After the extension portion 104 is bent, on the front side of the base portion 103, the second solder pad 106 is higher than the first solder pad 105. Thus, through the bending of the extension portion 104, the second solder pad 106 and the first solder pad 105 form a height difference required for installing the LED device 300 and the camera 200, so as to meet the installation requirements of the end of the endoscope lens, and ensure that the distance between the side surface of the LED device 300 installed on the second solder pad 106 facing away from the second solder pad 106 after bending and the base portion 103 is less than or equal to the distance between the side surface of the camera 200 installed on the first solder pad 105 facing away from the first solder pad 105 and the base portion 103, that is, after installation, the light emitting surface of the LED device 300 is lower than the shooting surface of the camera 200 or is flush with the shooting surface of the camera 200, which can ensure that sufficient light is provided to the camera 200 while avoiding the LED device blocking the light of the shooting surface and affecting the shooting effect.

[0060] In addition, after the extension portion 104 is bent, the second solder pad 106 can be moved closer to the camera 200, that is, after installation, the LED device 300 is located next to the camera 200, which can provide sufficient light for the camera 200 and effectively improve the clarity and quality of the shooting.

[0061] In the embodiment of the present application, the base portion 103 has a set length, and the specific length can be reasonably configured according to the bending angle requirement. The base portion 103 includes a first section 1031 and a second section 1032 along the length direction, the first section 1031 is connected to the main body 102, the second section 1032 is connected to the end of the first section 1031 away from the main body 102, the first pad 105 is located on the front of the first section 1031, and the third pad 107 is located on the front of the second section 1032, wherein the second section 1032 can be bent relative to the main body 102, specifically, the bent second section 1032 and the bent extension portion 104 are located on the reverse side and the front side of the base portion 103, respectively. The bent second section 1032 drives the third solder pad 107 to flip at a certain angle, in the same direction as the fourth solder pad 108 disposed on the back side of the main body 102, and the second section 1032 is as close to the main body 102 as possible, so as to facilitate the welding of the two ends of the second circuit structure on the third solder pad 107 and the fourth solder pad 108, thereby reducing the impact between the circuits.

[0062] The extension portion 104 can be bent relative to the base portion 103 in a variety of ways to form a height difference. For example, as an optional embodiment, the extension portion 104 has a set length, and the specific length can be reasonably configured according to the required height difference between the first pad 105 and the second pad 106. There are two extension portions 104, and the two extension portions 104 are respectively connected to the opposite side edges of the first section 1031, and extend in directions away from each other for a set length. The second pad 106 is located at the edge of the extension portion 104 away from the base portion 103. Specifically, each of the two extension portions 104 is provided with a second pad 106, so that both sides of the camera 200 are illuminated, providing sufficient and balanced illumination to ensure the clarity and quality of the shooting. The bending direction of the extension part 104 is toward the front of the cable body 101, and the bending angle is usually 90 degrees. After bending, the second pad 106 is perpendicular to the first pad 105, and both are in the direction of the front of the base part 103, so that the camera 200 and the LED device 300 are located in the same vertical space, and the second pad 106 is higher than the first pad 105. Therefore, the extension part 104 as a whole can achieve the required height difference between the second pad 106 and the first pad 105 by bending once, the second pad 106 and the first pad 105 are perpendicular, and the end-emitting LED device 300 is used, so that the working surface of the camera 200 and the lighting direction of the LED device 300 are parallel, the structure is simple and easy to operate, and the process is simplified.

[0063] In some embodiments of the FPC cable 100, reference Figures 1 to 3, the number of extension parts 104 is two, and after the two extension parts 104 are bent, the two second pads 106 can be located on both sides above the first pad 105. Therefore, after the camera 200 and the LED device 300 are connected to the end of the endoscope head, the two opposite sides of the camera 200 have the LED device 300, so that the illumination is uniform, and the formation of shadows is avoided, which helps to improve the clarity of the camera 200 shooting in the body cavity. In addition, the second pads 106 on each extension part 104 can be connected to the LED device 300 respectively, so that two LED devices 300 can be connected in parallel on the same FPC cable 100. Compared with the solution of connecting through a coaxial cable, the number of cables can be reduced, and the occupation of the internal volume space can be reduced, which is beneficial to the miniaturization of the endoscope.

[0064] In some embodiments of the FPC cable 100, the main body 102 includes a front end 1021 and a rear end 1022, the front end 1021 is connected to the base 103, the rear end 1022 is away from the base 103, the front end 1021 can be bent relative to the base 103, and the bending direction of the front end 1021 is opposite to the bending direction of the second section 1032, so that the bent second section 1032 is close to the main body 102. Since the third pad 107 and the fourth pad 108 are oriented in different directions in the present application, the second section 1032 located on one side of the first section 1031 of the base 103 is bent toward the reverse side of the main body 102, so that the third pad 107 and the fourth pad 108 are oriented to the same side. The front end 1021 located on the other side of the first section 1031 of the base 103 is bent toward the center of the first section 1031, close to the bent second section 1032, and the overall volume of the bent end is reduced.

[0065] In some embodiments of the FPC cable 100, the reverse side of the first section 1031, the reverse side of the second section 1032, and the front side of the rear end 1022 are respectively provided with a first reinforcement layer 400, a second reinforcement layer 500, and a third reinforcement layer 600, and the shapes of the first reinforcement layer 400, the second reinforcement layer 500, and the third reinforcement layer 600 are respectively the same as the shapes of the first section 1031, the second section 1032, and the rear end 1022. Since the front side of the first section 1031, the front side of the second section 1032, and the reverse side of the rear end 1022 in the present application are respectively provided with a first pad 105, a third pad 107, and a fourth pad 108, and since the strength of the FPC stacked structure is relatively low, a reinforcement structure is added at the position where the structure needs to be strengthened to increase the structural strength. At the same time, the above-mentioned parts belong to the cables with higher shielding requirements in the FPC cable 100, so the above-mentioned cables and pads are provided with reinforcement layers for covering and shielding, and the shielding requirements of other cables, pads, and parts are relatively low, so there is no need for shielding design. The above configuration can improve the cable shielding effect of the FPC cable 100 and enhance signal transmission. The first reinforcement layer 400, the second reinforcement layer 500 and the third reinforcement layer 600 can be made of polyimide, which is one of the organic polymer materials with the best comprehensive performance, high temperature resistance and high insulation, excellent shielding effect, and light weight.

[0066] In some embodiments of the FPC cable 100, a metal reinforcement layer 700 is further provided on the reverse side of the main body 102, and the metal reinforcement layer 700 is provided between the front end 1021 and the rear end 1022 of the main body 102. The front side of the metal reinforcement layer 700 is a connector pad 109, which is respectively connected to the first circuit structure and the second circuit structure. The connector pad 109 is used to weld the connector of the FPC cable 100. When in use, the front side of the metal reinforcement layer 700 is coated with a welding layer material, so that it can be used as a pad, and it also has a certain shielding effect, thereby increasing the strength of the structure.

[0067] Fig.11 is a schematic cross-sectional view of the line body in the embodiment of the present application, refer to Fig.11In the above embodiment, the body 101 of the FPC cable 100 includes a substrate layer 122, an inner insulating layer 123, a shielding layer 124 and an outer insulating layer 125. The circuit structure inside the body 101 includes a camera circuit 126 and an LED circuit 127. The first circuit structure is arranged in the substrate layer 122. The inner insulating layer 123, the shielding layer 124 and the outer insulating layer 125 are sequentially stacked on both sides of the substrate layer 122. Among them, the substrate layer 122 can be a copper substrate 128, the shielding layer 124 can be made of copper foil, the inner insulating layer 123 and the outer insulating layer 125 are made of insulating material for the insulation of the shielding layer 124, and the inner insulating layer 123 can also be provided with an adhesive layer for bonding the substrate layer 122 and / or the shielding layer 124. Specifically, the substrate layer 122 has a first side surface and a second side surface corresponding to the front and back surfaces, respectively. The camera circuit 126 is disposed on the first side surface, and the LED circuit 127 is disposed on the second side surface, thereby isolating the camera circuit 126 from the LED circuit 127, and reducing the influence between different circuit modules. The substrate layer 122 can form the camera circuit 126 and the LED circuit 127 on both sides respectively through a double-sided etching process commonly used in the FPC manufacturing process, thereby realizing double-sided wiring.

[0068] In some embodiments of the FPC cable 100, as Fig.12 As shown, the second line structure includes a plurality of coaxial lines 10, and the coaxial lines 10 include a center conductor 11, an internal insulating layer 12, an internal shielding layer 13, and an external insulating layer 14 from the inside to the outside. Some layers of the coaxial line 10 are stripped, so the layers exposed in each section are different. Specifically, the coaxial line 10 is formed from one end to the midpoint along the length direction to include the center conductor 11, the internal insulating layer 12, the internal shielding layer 13, and the external insulating layer 14, and from the other end to the midpoint along the length direction to include the center conductor 11, the internal insulating layer 12, the external insulating layer 14, the internal shielding layer 13, and the external insulating layer 14, respectively. Each section of the center conductor 11, the internal insulating layer 12, the internal shielding layer 13, and the external insulating layer 14 along the length direction has a set length. The coaxial line 10 is stripped from both ends to the center, and all other layers are stripped at the ends of both ends. The center conductor 11 is exposed at one end, and then only the center conductor 11 and the internal insulation layer 12 are left. The external insulation layer 14 is then stripped to leave the center conductor 11, the internal insulation layer 12 and the internal shielding layer 13. The middle part is not stripped. The other end has a different structure from the above one end and is stripped according to a predetermined setting. The center conductor 11 leaking from both ends is welded to the third pad 107 and the fourth pad 108 respectively, and the internal insulation layer 12 at both ends is welded to the shielding layer pad. The different sensitivity of metal and plastic materials to lasers of different wavelengths is utilized. For example, the wavelength of CO2 laser is 10.6μm, and the wavelength of fiber laser is 1.08μm. When cutting metal, the absorption rate of fiber laser is 3 times that of CO2 laser. When cutting plastic, CO2 laser is more easily absorbed.

[0069] The present application also provides a coaxial line shielding pad 1071 on the second section 1032 of the base portion 103 for welding with the internal shielding layer 13 of the coaxial line 10 .

[0070] Fig.13 is a schematic diagram of the exploded structure of the camera module according to an embodiment of the present application, Fig.14 This is a schematic diagram of the structure of the camera module of the embodiment of the present application, refer to Fig.13 and Fig.14 The second embodiment of the present application provides a camera module, including a camera 200, an LED device 300 and the FPC cable 100 of the first embodiment, wherein the camera 200 is connected to the first solder pad 105 and electrically connected to the first circuit structure; the LED device 300 is connected to the second solder pad 106 and electrically connected to the first circuit structure; wherein the extension portion 104 is bent relative to the base portion 103, and the LED device 300 is perpendicular to the direction of the camera 200. Since the LED device 300 used is an end-emitting LED device, the light-emitting surface of the LED device 300 is in the same direction as the working surface of the camera 200, that is, the light-emitting surface of the LED device 300 is parallel to the working surface of the camera 200. The first circuit structure is usually used for power supply of the LED device 300 and the camera 200, and the cable shielding requirement is low, so no shielding is set in the subsequent structure.

[0071] The two ends of the second circuit structure of the camera module are respectively connected to the third solder pad 107 and the fourth solder pad 108. The second circuit structure is independent of the FPC cable 100 and is used for the transmission of clock signals, data signals, etc. The above-mentioned cables have higher shielding requirements and are convenient for shielding settings.

[0072] The FPC cable 100 of the first embodiment is adopted, the camera 200 is connected to the first solder pad 105 on the FPC cable 100, and the LED device 300 is connected to the second solder pad 106 on the FPC cable 100. By setting the first solder pad 105 on the base portion 103, the FPC cable 100 can not only reduce the circuit volume, but also simplify the welding process, improve the reliability of the connection, and thus improve the connection efficiency.

[0073] It is understandable that the above-mentioned FPC cable setting is adopted to divide the cables into a first circuit structure and a second circuit structure. The cables are distinguished according to the shielding requirements. The cables with low shielding requirements are arranged inside, and the cables with high shielding requirements are arranged outside for welding. The first circuit structure is used to power the camera and LED device at the end of the endoscope lens, and the second circuit structure is used for the transmission of clock signals, data signals, etc., which is convenient for subsequent shielding settings. The use of FPC to replace the cable reduces the volume, and the connection between the pads on the FPC cable 100 and the camera 200 and the LED device 300 can be achieved through the reflow soldering process commonly used in the circuit board welding process. For example, a plurality of solder balls or electrodes are arranged at the bottom of the camera 200. During the welding process, these solder balls or electrodes are reflowed or welded to the first pad 105. The welding process is simple and the connection is reliable. The reflow soldering of the LED device 300 is similar.

[0074] Furthermore, it can be seen from the FPC cable 100 of the first embodiment that, by bending the extension 104 and using the side-emitting LED device 300, the camera 200 and the LED device 300 are oriented in the same direction, the light-emitting surface of the LED device 300 is parallel to the shooting surface of the camera 200, and the second solder pad 106 and the first solder pad 105 form the height difference required for installing the LED device 300 and the camera 200, ensuring that the light-emitting surface of the LED device 300 is not higher than the shooting surface of the camera 200 after installation, and preventing the LED device from blocking the light on the shooting surface and affecting the shooting effect. The remaining structures of the cable body 101 can refer to the description in the previous embodiment.

[0075] In some embodiments of the camera module, two LED devices 300 are included, and thus, the FPC cable 100 may include two extensions 104, which are respectively connected to the opposite side edges of the base 103 and extend in directions away from each other for a set length. After the two extensions 104 are bent, the two second pads 106 can be located on both sides above the first pad 105. Therefore, after the camera 200 and the LED device 300 are connected, the opposite sides of the camera 200 have the LED device 300, thereby forming uniform illumination, avoiding shadows, and helping to improve the clarity of the camera 200 shooting in the body cavity. In addition, two LED devices 300 can be connected in parallel on the same FPC cable 100, which can reduce the number of cables and the occupation of the internal volume space compared to the solution of connecting through a coaxial cable, which is beneficial to the miniaturization of the endoscope.

[0076] According to the camera module of the second embodiment of the present application, the camera module also includes a heat shrink tube 800, which is sleeved outside the main body 102. Under normal conditions, the internal space of the heat shrink tube 800 is larger than the main body 102, and shrinks when heated and wraps around the outside of the main body 102 to protect the main body 102. And welding sealant 900, which is respectively coated on the outside of the base part 103, the extension part 104 and the fourth pad 108, covers and protects the welding part of the second circuit structure. Specifically, it is set to two, respectively set at the two ends of the line body 101. Since the external shapes of the two ends of the line body 101 are different, the two welding sealants 900 also form different shapes to match the two ends of the line body 101.

[0077] In addition to the above, the camera module also includes a lens cover 20 and a metal foil 30, which are respectively used to cover and shield the camera 200. It also includes a connector 40, which is welded to the connector pad 109.

[0078] The third aspect of the present application provides an endoscope, including a head end and a camera module of the second aspect of the embodiment, the head end having a housing cavity, and the head end having a support portion disposed in the housing cavity. The camera module is disposed in the housing cavity, and the FPC cable 100 is connected to the support portion. The camera module of the second aspect of the embodiment can not only reduce the volume of the circuit, which is beneficial to the miniaturization of the endoscope, but also simplify the welding process, improve the reliability of the connection, and thus improve the connection efficiency and yield. By bending the extension portion 104 and using a side-emitting LED, the camera 200 and the LED device 300 are oriented in the same direction and the shooting surface and the light-emitting surface are parallel to each other, so that after being connected to the head end, lighting and observation can be achieved on the same side of the head end.

[0079] It is understandable that the endoscope generally further includes a snake bone and a handle, the head end is connected to the front end of the snake bone, the position and orientation of the head end is controlled by operating the bending of the snake bone, and the camera module provided in the head end realizes signal transmission with the camera 200 and the LED device 300 through the FPC cable 100, so that the camera 200 and the LED device 300 can be operated. In the embodiment of the present application, the reduction in the volume of the signal transmission line of the camera 200 and the LED device 300 can also reduce the impact on the bending effect of the snake bone part, which helps to improve the accuracy of the movement of the head end driven by the snake bone.

[0080] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. FPC cable, characterized in that: include: The wire body has a front side and a back side, and has a first circuit structure inside and is connected to a second circuit structure outside. The wire body includes a main body, a base and an extension. The base is connected to one end of the main body, and the extension is connected to an edge of the base. A first pad is disposed on the front side of the base portion and connected to the first circuit structure; A second pad is disposed on the front side of the extension portion and connected to the first circuit structure; a third pad, disposed on the front surface of the base portion and connected to the second circuit structure; a fourth pad, disposed on the reverse side of the main body and connected to the second circuit structure; Wherein, the extension portion can be bent relative to the base portion, and the first pad and the second pad are oriented perpendicularly; A portion of the base portion can be bent relative to the main body portion so that the third pad and the fourth pad face the same direction.

2. The FPC cable according to claim 1, characterized in that: The base portion has a set length, and the base portion includes a first section and a second section along the length direction, the first section is connected to the main body portion, the second section is connected to an end of the first section away from the main body portion, the first solder pad is located on the front side of the first section, and the third solder pad is located on the front side of the second section, wherein the second section can be bent relative to the main body portion.

3. The FPC cable according to claim 2, characterized in that: There are two extension parts, which are respectively connected to the opposite side edges of the first section and extend in directions away from each other by a set length. The second pad is located at the edge of the extension part away from the base part.

4. The FPC cable according to claim 2, characterized in that: The main body portion includes a front end and a rear end, the front end is connected to the base portion, and the rear end is far away from the base portion. The front end can be bent relative to the base portion, and the bending direction of the front end is opposite to the bending direction of the second section, so that the bent second section is close to the main body portion.

5. The FPC cable according to claim 4, characterized in that: The reverse side of the first section, the reverse side of the second section, and the front side of the rear end are respectively provided with a first reinforcement layer, a second reinforcement layer, and a third reinforcement layer, and the shapes of the first reinforcement layer, the second reinforcement layer, and the third reinforcement layer are respectively the same as the shapes of the first section, the second section, and the rear end.

6. The FPC cable according to claim 1, characterized in that: A metal reinforcement layer is further disposed on the reverse side of the main body, and a connector pad is disposed on the front side of the metal reinforcement layer. The connector pads are respectively connected to the first circuit structure and the second circuit structure.

7. The FPC cable according to any one of claims 1 to 6, characterized in that: The line body includes a base material layer, an inner insulating layer, a shielding layer and an outer insulating layer. The first circuit structure includes a camera circuit and an LED circuit. The first circuit structure is arranged on the base material layer. The inner insulating layer, the shielding layer and the outer insulating layer are sequentially stacked on both sides of the base material layer.

8. The FPC cable according to claim 7, characterized in that: The second line structure includes a plurality of coaxial lines, which include a center conductor, an internal insulation layer, an internal shielding layer and an external insulation layer from the inside to the outside; some layers of the coaxial line are stripped, and the center conductor, the internal insulation layer, the internal shielding layer and the external insulation layer are exposed from one end to the midpoint along the length direction, and the center conductor, the internal insulation layer, the external insulation layer, the internal shielding layer and the external insulation layer are exposed from the other end to the midpoint along the length direction, and each section of the center conductor, the internal insulation layer, the internal shielding layer and the external insulation layer along the length direction has a set length.

9. The FPC cable according to claim 8, characterized in that: The third pad and the fourth pad each include a central conductor pad and a shielding layer pad, and the central conductor pad and the shielding layer pad are welded to the central conductor and the insulating layer, respectively.

10. A camera module, characterized in that: include: The FPC cable as claimed in any one of claims 1 to 9; A camera connected to the first pad and electrically connected to the first circuit structure; an LED device connected to the second pad and electrically connected to the first circuit structure; The extension portion is bent relative to the base portion, and the LED device is perpendicular to the direction of the camera, and the working surface of the camera and the light-emitting surface of the LED device are in the same direction; Two ends of the second circuit structure are connected to the third pad and the fourth pad respectively.

11. The camera module according to claim 10, characterized in that: Also includes: A heat shrink tube, sleeved outside the main body; The welding sealant is respectively coated on the base portion, the extension portion and the outside of the fourth welding pad.

12. An endoscope, characterized in that include: The head end portion has a receiving cavity, and the head end portion is provided with a supporting portion in the receiving cavity; The camera module described in claim 10 or 11 is arranged in the accommodating cavity, and the FPC cable is connected to the supporting part.

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