Endoscope image module based on compact side-by-side cable

Abstract

Embodiments of the present application provide an endoscope image module based on a compact parallel cable and a preparation method thereof, and relate to the field of endoscopes. The endoscope image module based on the compact parallel cable comprises an image acquisition assembly and a cable. The cable comprises a plurality of conductors, an insulation layer, a shielding layer and an outer covering. The plurality of conductors are arranged side by side along the width direction of the cable. The outer side of each conductor is coated with the insulation layer to form a plurality of side-by-side insulated cores. The shielding layer is arranged on the outer side of the insulated cores. The shielding layer comprises a plurality of isolated shielding portions. Each isolated shielding portion is arranged between two adjacent insulated cores. The space occupied by the shielding layer between adjacent insulated cores can be reduced, thereby reducing the overall cross-sectional size of the cable and making the cable more compact.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, specifically to an endoscopy imaging module based on a compact side-by-side cable and its manufacturing method. Background Technology

[0002] Endoscopic imaging modules are typically located at the distal end of the endoscope insertion section to acquire images of body cavities, tissue surfaces, or instrument operating areas. To enable power supply and image data signal transmission between the imaging module and external processing equipment, cables are usually required. Because the outer diameter of the endoscope insertion section is strictly limited, and lighting, support, sealing, and other functional structures need to be arranged around the imaging module, the cable must not only have stable electrical signal transmission capabilities but also a small cross-sectional size, good bending adaptability, and high wiring compactness to meet the requirements of endoscope miniaturization and flexible insertion.

[0003] Existing cables used in endoscopic imaging modules typically consist of conductors, insulation layers, shielding layers, and an outer sheath. To reduce signal interference between adjacent conductors, current technologies often employ relatively independent shielding structures on the outside of each conductor, or multiple layers of shielding structures are superimposed between adjacent conductors. While these methods can improve signal shielding to some extent, for extremely thin, parallel cables, multiple layers of shielding structures between adjacent insulated cores occupy significant space in the width or thickness directions, leading to an increase in the overall cable cross-sectional size. This makes it difficult to meet the compact wiring requirements of miniature endoscopic imaging modules. Therefore, how to reduce the space occupied by shielding structures between adjacent insulated cores while ensuring effective shielding between adjacent conductors, thus making the cable structure more compact, has become a pressing technical problem to be solved. Summary of the Invention

[0004] According to embodiments of the present invention, an endoscope imaging module based on a compact side-by-side cable and a method for manufacturing the same are provided. This addresses the problems raised in the background section.

[0005] In a first aspect of the invention, an endoscopic imaging module based on a compact side-by-side cable is provided.

[0006] The endoscopic imaging module based on a compact side-by-side cable includes: an image acquisition component and a cable; The cable includes multiple conductors, an insulation layer, a shielding layer, and an outer sheath; Multiple conductors are arranged side by side along the width direction of the cable, and the outer side of each conductor is covered with the insulation layer to form multiple insulated wire cores arranged side by side; The shielding layer is disposed on the outside of the insulated wire core. The shielding layer includes a plurality of isolation shielding parts, each of which is disposed between two adjacent insulated wire cores, so that two adjacent conductors share the same isolation shielding part. The outer layer is covered on the outside of the shielding layer; One end of the cable is connected to the image acquisition component and is used to transmit power supply signals and / or image data signals to the image acquisition component.

[0007] Preferably, the image acquisition component includes an image sensor and a circuit connection part, and the plurality of conductors of the compact side-by-side cable are respectively electrically connected to the circuit connection part; The image sensor includes a camera and a light source.

[0008] Preferably, the outer side of the shielding layer is provided with a positioning protrusion, and the inner wall of the outer layer is provided with a limiting groove corresponding to the positioning protrusion, and the positioning protrusion is at least partially located in the limiting groove.

[0009] Preferably, the outer surface of the positioning protrusion is in contact with the wall of the limiting groove. When the compact side-by-side cable is subjected to bending, the positioning protrusion can adaptively displace relative to the wall of the limiting groove within the constraint range of the limiting groove, so that the shielding layer and the outer sheath form a non-fixed bending fit, and maintain the covering position of the common shielding layer relative to the adjacent insulation layer.

[0010] Preferably, the plurality of insulated wire cores are divided into a plurality of wire core groups along the width direction of the cable, and each wire core group includes at least two adjacent insulated wire cores; the shielding layer covers each of the insulated wire cores corresponding to a wire core group.

[0011] Preferably, the outer cover is made of ethylene-tetrafluoroethylene copolymer, perfluoroethylene-propylene copolymer, tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, or thermoplastic polyurethane elastomer.

[0012] Preferably, the insulating layer is made of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, perfluoroethylene propylene copolymer, ethylene-tetrafluoroethylene copolymer or polyimide.

[0013] Preferably, the conductor is formed by stranding silver-plated copper alloy wire, tin-plated copper alloy wire, or copper-silver alloy wire.

[0014] In a second aspect of the invention, a method for fabricating an endoscope imaging module based on a compact side-by-side cable is provided.

[0015] The production method includes: Step A. Prepare insulated wire cores and arrange them side by side along the width direction; Step B. A common shielding cover is formed on the outside of at least two adjacent insulated conductors, such that the same common shielding cover spans across the outside of at least two adjacent insulated conductors, and at least two adjacent conductors share the same common shielding cover. Step C. The co-shielding covering part with the positioning protrusion is introduced into the outer sheath forming head. The outer sheath material is plasticized by the extruder and then conveyed to the outer sheath forming head. It is continuously extruded through the forming flow channel of the outer sheath forming head and covers the outside of the co-shielding covering part. The molten outer sheath material is cooled and shaped into an outer sheath on the outside of the co-shielding covering part to obtain the cable. During the continuous extrusion and coating process of the outer material, the inner wall of the outer material forms a limiting groove at the position corresponding to the positioning protrusion, following the outer contour of the positioning protrusion, and at least partially accommodates the positioning protrusion within the limiting groove.

[0016] Preferably, the method further includes step D. bending the cooled and shaped compact side-by-side cable to deform the cable during bending and to allow the positioning protrusion to move relative to the outer casing within the constraint range of the limiting groove.

[0017] One or more technical solutions provided in this application have at least the following technical effects or advantages: This invention provides an endoscope imaging module based on a compact side-by-side cable and its manufacturing method. This endoscope imaging module arranges multiple conductors side-by-side along the width of the cable, with only one layer of isolation shielding between adjacent insulated cores. This allows adjacent conductors to share the same isolation shielding structure. Compared to configuring independent shielding structures for adjacent conductors, this reduces the space occupied by the overlapping shielding layers between adjacent insulated cores, thereby reducing the overall cross-sectional size of the cable and making it more compact, thus meeting the wiring requirements of endoscope imaging modules with limited space at the far end. Simultaneously, the isolation shielding can still be located between adjacent conductors, shielding against mutual interference paths between them, balancing compact layout and signal transmission stability. Furthermore, the cooperation of positioning protrusions and limiting grooves allows the shielding layer to maintain relative positioning within the outer sheath, forming a non-fixed bending fit when the cable bends. This allows the shielding layer to adapt to the bending deformation of the cable, thereby improving the structural stability and reliability of the compact side-by-side cable in the bending wiring environment of endoscopes.

[0018] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of the present invention, nor is it intended to restrict the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0019] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 A three-dimensional structural schematic diagram of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 1 of the present invention is shown. Figure 2 An exploded view of the first-angle structure of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 1 of the present invention is shown. Figure 3 An exploded view of the second-angle structure of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 1 of the present invention is shown. Figure 4 A schematic diagram of the cross-section of an endoscope imaging module cable based on a compact side-by-side cable according to Embodiment 1 of the present invention is shown. Figure 5 A partial cross-sectional view of the cable structure of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 1 of the present invention is shown. Figure 5 A schematic cross-sectional structure of an endoscope imaging module cable based on a compact side-by-side cable according to an embodiment of the present invention is shown, including the core assembly. Figure 6 A schematic cross-sectional view of the core assembly of an endoscope imaging module cable based on a compact side-by-side cable according to Embodiment 1 of the present invention is shown. Figure 7 A three-dimensional structural diagram of the connection between the conveyor and the bending processing device of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown. Figure 8 A front view schematic diagram of the connection between the conveyor and the bending processing device of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown. Figure 9 A three-dimensional structural schematic diagram of a bending processing device connecting a conveyor and a bending processing device for an endoscope imaging module based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown. Figure 10 An exploded structural schematic diagram of a conveyor connecting an endoscope imaging module conveyor and a bending processing device based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown. Figure 11 A schematic diagram of the internal structure of the conveyor for an endoscope imaging module based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown. Figure 12 A cross-sectional view of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown. Figure 13 A front view schematic diagram of a bending processing device for an endoscope image module based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown. Figure 14 A schematic diagram of the structure of the second conveyor roller and the first conveyor roller of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown; Figure 15 A cross-sectional schematic diagram of the cooling mechanism of an endoscope imaging module based on a compact side-by-side cable according to Embodiment 2 of the present invention is shown.

[0020] Explanation of reference numerals in the attached figures 1-Image acquisition component, 11-Image sensor, 111-Camera, 112-Light source, 12-Circuit connection part, 2-Cable, 21-Conductor, 22-Insulation layer, 23-Shielding layer, 231-Positioning protrusion, 232-Isolation shielding part, 241-Limiting groove, 3-Conveyor, 31-First drive component, 311-First motor, 312-First gear, 313-Second gear, 32-First conveyor roller, 33-Second conveyor roller, 34-First housing, 35-Second housing, 36-Mounting body, 37-Guide Sleeve, 4-Bending device, 41-Frame, 411-Connecting seat, 42-Cable conduit, 43-Silk reel, 44-Second drive assembly, 441-Electric push rod, 4411-Connecting shaft, 442-Transmission rod, 4421-Drive groove, 443-Connecting support arm, 45-Silk reel seat, 5-Rotary drive mechanism, 51-Base, 52-Second motor, 53-Drive pulley, 54-Driven pulley, 55-Transmission belt, 6-Cooling mechanism, 61-Cooling pipe, 611-Drain hole, 612-Guide slope, 62-Water supply pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Example 1 like Figures 1 to 5 As shown, the endoscopic imaging module based on the compact side-by-side cable 2 includes an image acquisition component 1 and a cable 2. One end of the cable 2 is connected to the image acquisition component 1, enabling the cable 2 to serve as a carrier for transmitting power supply signals and / or image data signals for the image acquisition component 1. During endoscopy, the image acquisition component 1 is used to acquire image information within the human body cavities. The cable 2 is used to establish an electrical connection between the image acquisition component 1 and external devices, thereby enabling power supply transmission and image data transmission.

[0024] The cable 2 includes multiple conductors 21, an insulation layer 22, a shielding layer 23, and an outer sheath 24. The multiple conductors 21 are arranged side-by-side along the width of the cable 2, forming a compact side-by-side arrangement. Each conductor 21 is covered with an insulation layer 22 to form multiple insulated cores arranged side-by-side. By providing insulation layers 22 on the outside of each conductor 21, electrical isolation can be maintained between adjacent conductors 21, preventing direct contact between conductors 21 and ensuring stable transmission of power supply signals or image data signals. The shielding layer 23 is disposed on the outside of the insulated cores and includes multiple isolation shielding portions 232. Each isolation shielding portion 232 is disposed between two adjacent insulated cores, allowing two adjacent conductors 21 to share the same isolation shielding portion 232. Therefore, instead of setting independent complete shielding structures between two adjacent conductors 21, they are shielded and isolated by the isolation shielding part 232 located between them. This maintains the signal isolation effect of adjacent conductors 21 while reducing the space occupied by the shielding structure in the width or thickness direction of the cable 2, making the cable 2 more suitable for the space-constrained wiring environment in the endoscope imaging module.

[0025] During signal transmission, conductor 21 is used to transmit power supply signals and / or image data signals, insulation layer 22 is used to define the electrical boundaries of conductor 21, and shielding layer 23 is used to shield interference signals outside conductor 21. Since the isolation shield 232 is located between two adjacent insulated cores, when two adjacent conductors 21 transmit signals simultaneously, the isolation shield 232 can block the mutual interference paths between adjacent conductors 21, so that adjacent conductors 21 can still maintain a relatively stable signal transmission state even when they are arranged in a compact side-by-side.

[0026] The outer sheath 24 covers the outside of the shielding layer 23, providing overall protection for the shielding layer 23, the insulation layer 22, and the conductor 21. The outer sheath 24 ensures that the multiple side-by-side insulated cores and the shielding layer 23 maintain their predetermined relative positions, preventing the cable 2 from becoming loose or shifting during assembly, bending, or use. Simultaneously, the outer sheath 24 also provides external protection for the cable 2, ensuring its overall structural stability during the assembly and use of the endoscope imaging module. After one end of the cable 2 is connected to the image acquisition component 1, the multiple conductors 21 can respectively transmit power supply signals and / or image data signals. Because the cable 2 uses a structure with multiple conductors 21 arranged side-by-side, and achieves shielding isolation by sharing an isolation shielding part 232 between adjacent conductors 21, the overall size of the cable 2 can be reduced within the limited endoscope assembly space, while simultaneously meeting the requirements of the image acquisition component 1 for the stability of power supply and image data transmission.

[0027] The shielding layer 23 is disposed on the outside of the insulated cores and includes multiple isolation shielding parts 232, each of which is located between two adjacent insulated cores. That is, instead of two independent shielding structures corresponding to each conductor 21, only one isolation shielding part 232 is provided between two adjacent insulated cores. This isolation shielding part 232 also serves as the shielding isolation structure between the two adjacent conductors 21, allowing them to share the same isolation shielding part 232. This reduces the space occupied by one shielding structure between adjacent conductors 21, avoiding the increase in the width or thickness of the cable 2 when multiple conductors 21 are arranged side-by-side due to each conductor 21 having its own complete shielding layer. Because only one isolation shielding part 232 is provided between adjacent insulated cores, the cable 2 can reduce its overall cross-sectional size while maintaining the shielding isolation between adjacent conductors 21, making the cable 2 more compact and suitable for the confined space and multi-signal transmission assembly environment of endoscopic imaging modules. During signal transmission, the isolation shield 232 is located between two adjacent insulated cores, effectively isolating the mutual interference paths between adjacent conductors 21. Since the isolation shield 232 is shared by two adjacent conductors 21, it still provides shielding for adjacent conductors 21 without increasing the thickness of the shielding layer between adjacent insulated cores. Therefore, the cable 2 can achieve a side-by-side arrangement of multiple conductors 21 within a limited cross-sectional space, while maintaining both compact wiring and stable signal transmission.

[0028] In this embodiment, the image acquisition component 1 includes an image sensor 11 and a circuit connection part 12. Multiple conductors 21 of the compactly arranged cable 2 are electrically connected to the circuit connection part 12. The circuit connection part 12 establishes an electrical connection between the compactly arranged cable 2 and the image sensor 11, allowing power supply signals and / or image data signals transmitted by the multiple conductors 21 to be transmitted to the image sensor 11 via the circuit connection part 12, or vice versa. Since the multiple conductors 21 are arranged side-by-side along the width of the cable 2, they form a relatively regular connection arrangement when connected to the circuit connection part 12, which is beneficial for the miniaturization of the image acquisition component 1. The image sensor 11 includes a camera 111 and a light source 112. The camera 111 acquires image information of the endoscopic observation area, and the light source 112 provides illumination to the acquisition area of ​​the camera 111, enabling the camera 111 to obtain identifiable images in environments with insufficient light, such as human cavities. The light source 112 and the camera 111 are integrated into the image sensor 11, enabling the image acquisition component 1 to simultaneously have illumination and image acquisition functions, thereby meeting the integrated requirements of illumination and imaging of the endoscope in a confined space.

[0029] In practical use, some conductors 21 in the compact side-by-side cable 2 can be used to provide the power supply signal required for the image sensor 11 to operate, and some conductors 21 can be used to transmit the image data signal acquired by the camera 111. The circuit connection part 12 is located between the conductors 21 and the image sensor 11, and can connect multiple conductors 21 to the corresponding electrical connection positions of the camera 111 and the light source 112 respectively, so that the camera 111 and the light source 112 can establish an electrical connection with external devices through the same compact side-by-side cable 2. With the above configuration, the image acquisition component 1 can achieve coordinated operation of lighting, image acquisition, and signal transmission while maintaining a compact structure.

[0030] In this embodiment, a positioning protrusion 231 is provided on the outer side of the shielding layer 23, and a limiting groove 241 corresponding to the positioning protrusion 231 is provided on the inner wall of the outer sheath 24. The positioning protrusion 231 is at least partially located within the limiting groove 241. Through the above arrangement, the positioning protrusion 231 and the limiting groove 241 form a mutually cooperating relationship in the radial and circumferential directions of the cable 2, so that the shielding layer 23 can maintain a predetermined relative position within the outer sheath 24, avoiding disorderly displacement of the shielding layer 23 relative to the outer sheath 24 during cable 2 bending, assembly, or use. Since the positioning protrusion 231 is provided on the outer side of the shielding layer 23 and the limiting groove 241 is formed on the inner wall of the outer sheath 24, the outer sheath 24, while covering the shielding layer 23, can also constrain the position of the positioning protrusion 231 through the limiting groove 241, thereby making the covering position of the shielding layer 23 relative to the multiple insulating layers 22 more stable.

[0031] In this embodiment, the outer surface of the positioning protrusion 231 is in contact with the wall of the limiting groove 241. This contact engagement does not fix the positioning protrusion 231 and the outer sheath 24 into a fixed, immovable structure, but rather guides and restricts the positioning protrusion 231 within the constraint range of the limiting groove 241. When the tightly packed cables 2 are subjected to bending, due to the differences in material properties, structural form, and bending deformation mode between the shielding layer 23 and the outer sheath 24, a relative adaptation requirement arises between them. At this time, the positioning protrusion 231 can adaptively displace relative to the outer sheath 24 along the direction of the wall of the limiting groove 241 or within the range defined by the limiting groove 241, so that the shielding layer 23 does not have to deform completely synchronously with the outer sheath 24 during the bending process of the cable 2. Through the above-mentioned engagement between the positioning protrusion 231 and the limiting groove 241, a non-fixed bending engagement relationship is formed between the shielding layer 23 and the outer sheath 24. This non-fixed bending fit relationship, on the one hand, limits the offset range of the positioning protrusion 231 through the limiting groove 241, ensuring that the shielding layer 23 does not deviate from its predetermined covering position on the adjacent insulation layer 22; on the other hand, it allows the positioning protrusion 231 to generate constrained adaptive displacement when the cable 2 bends, enabling the shielding layer 23 to adapt to the bending state of the cable 2 according to its own structural characteristics. Thus, while maintaining the stability of the shielding layer 23's covering of the adjacent insulation layer 22, it improves the structural adaptability of the compactly arranged side-by-side cable 2 in the bending wiring environment of the endoscope imaging module.

[0032] By providing a positioning protrusion 231 on the outer side of the shielding layer 23 and a limiting groove 241 corresponding to the positioning protrusion 231 on the inner wall of the outer sheath 24, the shielding layer 23 and the outer sheath 24 are no longer held in place solely by the covering pressure of the outer sheath 24. Instead, a clear limiting relationship is formed through the contact engagement of the positioning protrusion 231 and the limiting groove 241. This structure can limit the circumferential position of the shielding layer 23 relative to the outer sheath 24, preventing disordered displacement of the shielding layer 23 during cable 2 bending, threading, or assembly, thereby maintaining the covering position of the shielding layer 23 relative to the adjacent insulation layer 22. Simultaneously, since the positioning protrusion 231 can adapt to the bending deformation of the cable 2 within the constraint range of the limiting groove 241, a non-fixed bending engagement relationship is formed between the shielding layer 23 and the outer sheath 24, avoiding the problem of deformation inconsistency during bending after the shielding layer 23 and the outer sheath 24 are fully fixed. Therefore, while maintaining a compact structure and stable shielding coverage, the cable 2 can better adapt to the curved wiring environment in the endoscope imaging module.

[0033] like Figure 6As shown, in this embodiment, multiple insulated cores are arranged side by side along the width of the cable 2, and divided into multiple core groups according to the signal transmission requirements of the cable 2. Each core group includes at least two adjacent insulated cores. That is, the multiple insulated cores are not configured with shielding structures as completely independent cores, but rather at least two adjacent insulated cores are grouped and arranged as a whole core unit, so that the multiple insulated cores in the same core group can jointly form a relatively concentrated signal transmission area.

[0034] The shielding layer 23 covers each insulated core within a core group, allowing multiple conductors 21 within the same core group to share the shielding layer 23. With this configuration, it is not necessary to form completely independent shielding structures on the outside of each insulated core corresponding to each conductor 21 within the same core group. Instead, the shielding layer 23 comprehensively covers each insulated core within the core group, thereby reducing the space occupied by repeated shielding structures between adjacent insulated cores and making the cable 2 more compact in both width and thickness directions.

[0035] During the transmission of power supply signals and / or image data signals via cable 2, each conductor 21 within the same core group is electrically isolated by its corresponding insulation layer 22, while the shielding layer 23 shields and covers the core group from the outside. Thus, the shielding layer 23 not only provides shielding protection for the conductors 21 within the core group but also avoids increasing the cross-sectional size of cable 2 due to the separate shielding layers for multiple insulated cores, making this compact, side-by-side cable 2 more suitable for space-constrained wiring environments in endoscopic imaging modules.

[0036] In this embodiment, the shielding layer 23 can be a spirally wound metal wire layer, a cross-wound metal wire layer, a braided shielding layer, or a metallized film layer. When a spirally wound metal wire layer is used, the metal wires are continuously wound in a spiral manner along the outer periphery of the insulation layer 22, which can provide shielding while giving the shielding layer 23 good bending adaptability. When a cross-wound metal wire layer is used, two sets of metal wires can be cross-wound in opposite directions on the outside of the insulation layer 22, so that the shielding layer 23 forms a relatively continuous shielding coverage in the circumferential direction of the cable 2. When a braided shielding layer is used, multiple metal wires are woven together to form a mesh shielding structure, which can improve the structural stability of the shielding layer 23 in the length and circumferential directions of the cable 2. When a metallized film layer is used, the metallized film is wound on the outside of the insulation layer 22, which can form a shielding coverage with a smaller thickness, thereby helping to control the overall cross-sectional dimensions of the cable 2.

[0037] In this embodiment, the outer sheath 24 is made of ethylene-tetrafluoroethylene copolymer, perfluoroethylene-propylene copolymer, tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, or thermoplastic polyurethane elastomer. After the outer sheath 24 covers the outside of the shielding layer 23, it provides overall protection for the shielding layer 23, the insulation layer 22, and the conductor 21, and maintains the predetermined arrangement of the multiple side-by-side insulated cores. All of the above materials can be used as cable outer sheath materials, allowing the outer sheath 24 to maintain a continuous covering state during cable bending, threading, and assembly, thereby adapting to the wiring requirements within the confined space of the endoscope imaging module.

[0038] In this embodiment, the insulation layer 22 is made of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, perfluoroethylene propylene copolymer, ethylene-tetrafluoroethylene copolymer, or polyimide. The insulation layer 22 covers the outside of the conductor 21 to maintain electrical isolation between adjacent conductors 21 and to define the signal transmission boundary of the conductor 21. Since multiple conductors 21 are arranged side-by-side along the width direction of the cable 2, the insulation layer 22 can prevent direct contact between adjacent conductors 21, while providing a stable covering base for the shielding layer 23, enabling the shielding layer 23 to form a predetermined shielding structure around the insulated core.

[0039] In this embodiment, the conductor 21 is formed by stranding silver-plated copper alloy wire, tin-plated copper alloy wire, or copper-silver alloy wire. By stranding multiple alloy wires to form the conductor 21, the conductor 21 can maintain its electrical signal transmission function while possessing a certain degree of flexibility, allowing it to adapt to the bending wiring state of the cable 2 within the endoscope insertion section. Multiple conductors 21 are each covered by a corresponding insulation layer 22 to form multiple insulated cores. These insulated cores are then completely covered by a shielding layer 23 and an outer sheath 24, thereby forming a compact, side-by-side cable 2 suitable for endoscope imaging modules.

[0040] Example 2 like Figures 7 to 15 As shown, in a second aspect of the present invention, a method for fabricating an endoscope imaging module based on a compact side-by-side cable 2 is provided, the method being used to fabricate the aforementioned endoscope imaging module based on the compact side-by-side cable 2.

[0041] The preparation method includes the following steps: Step A: Prepare insulated wire cores and arrange multiple insulated wire cores side by side along the width direction. Specifically, cover the outside of each conductor 21 with insulating material to form an insulating layer 22, thereby obtaining multiple insulated wire cores; the multiple insulated wire cores are arranged side by side along the width direction of the cable 2, so that the multiple conductors 21 form a compact side by side arrangement in the subsequently formed cable 2.

[0042] Step B involves preparing a common shielding cover on the outside of at least two adjacent insulated cores, such that the same common shielding cover spans across the outside of at least two adjacent insulated cores, and that at least two adjacent conductors 21 share the same common shielding cover. This step eliminates the need for separate multi-layered shielding structures between adjacent insulated cores; instead, the common shielding cover covers and shields the adjacent insulated cores, reducing the space occupied by the shielding structures between adjacent insulated cores. Furthermore, a positioning protrusion 231 is provided on the outside of the common shielding cover, extending along the length of the cable 2, so that a limiting groove 241 corresponding to the positioning protrusion 231 can be formed on the inner wall of the outer sheath 24 during subsequent outer sheath 24 forming.

[0043] Step C: The co-shielding covering portion with positioning protrusions 231 is introduced into the outer sheath forming head. The outer sheath material is plasticized by an extruder and then conveyed to the outer sheath forming head. It is continuously extruded through the forming channel of the outer sheath forming head to cover the outside of the co-shielding covering portion. The molten outer sheath material is cooled and shaped on the outside of the co-shielding covering portion to form the outer sheath 24, thus obtaining the cable 2. During the continuous extrusion covering process, the molten outer sheath material covers the outside of the shielding layer 23, and a limiting groove 241 is formed at the position corresponding to the positioning protrusion 231 along the outer contour of the positioning protrusion 231, so that the positioning protrusion 231 is at least partially located in the limiting groove 241. Thus, while the outer sheath 24 completes the overall covering of the shielding layer 23, it can form a contact engagement relationship with the positioning protrusion 231 through the limiting groove 241, so that the shielding layer 23 is maintained in a predetermined position relative to the outer sheath 24, and provides a structural basis for the subsequent non-fixed bending engagement of the cable 2 in a bent state.

[0044] In this embodiment, after the outer sheath 24 is continuously extruded and wrapped around the outside of the shielding layer 23 by the outer sheath forming die head, the cable 2 enters the cooling mechanism 6 for cooling and shaping. The cooling mechanism 6 includes a cooling pipe 61 and a water supply pipe 62. The cooling pipe 61 is arranged along the conveying direction of the cable 2, and the cable 2 passes through the cooling pipe 61, so that the newly extruded outer sheath 24 can be cooled inside the cooling pipe 61. The water supply pipe 62 extends into the cooling pipe 61 and is used to supply cooling water into the cooling pipe 61. After entering the cooling pipe 61, the cooling water contacts or flows around the outer sheath 24 on the outside of the cable 2, thereby removing the heat carried by the outer sheath 24 after extrusion, so that the outer sheath 24 gradually cools from a molten or softened state and maintains the outer contour after forming.

[0045] A drain hole 611 is provided at the bottom of the cooling pipe 61. After cooling the cable 2, the cooling water entering the cooling pipe 61 is discharged through the drain hole 611. A guide slope 612 is also provided inside the cooling pipe 61. The guide slope 612 is used to guide the cooling water in the cooling pipe 61 to the location of the drain hole 611, so that the cooling water can collect and be discharged in a predetermined direction, avoiding the cooling water from stagnating in the cooling pipe 61 for a long time and affecting the flow of subsequent cooling water. Through the cooperation of the cooling pipe 61, the water supply pipe 62, the drain hole 611 and the guide slope 612, the cable 2 can obtain a stable cooling environment during continuous transportation, so that the outer sheath 24 can be shaped in time after covering the outside of the shielding layer 23.

[0046] During the continuous extrusion and coating process of the outer sheath material, the inner wall of the outer sheath 24 forms a limiting groove 241 at the position corresponding to the positioning protrusion 231, following the outer contour of the positioning protrusion 231, and at least partially accommodates the positioning protrusion 231 within the limiting groove 241. As the outer sheath 24 gradually cools and solidifies as it passes through the cooling mechanism 6, the shape of the limiting groove 241 is maintained as the outer sheath 24 solidifies, thus forming a stable contact fit between the positioning protrusion 231 and the limiting groove 241. Therefore, the cooling mechanism 6 not only forms a continuous external protective structure for the outer sheath 24, but also maintains the limiting groove 241 on the inner wall of the outer sheath 24 in a shape corresponding to the positioning protrusion 231, providing a structural basis for the positioning of the shielding layer 23 relative to the outer sheath 24 and for the non-fixed bending fit during subsequent bending of the cable 2.

[0047] In this embodiment, step D is also included, which involves bending the cooled and shaped compact side-by-side cable 2. Since the outer sheath 24 has essentially maintained its outer contour after being cooled by the cooling mechanism 6, and the limiting groove 241 on the inner wall of the outer sheath 24 has formed a corresponding contact fit with the positioning protrusion 231, the subsequent bending process allows the compact side-by-side cable 2 to undergo bending deformation during controlled bending, causing the positioning protrusion 231 to adaptively displace relative to the outer sheath 24 within the constraint range of the limiting groove 241. This bending process is not intended to change the basic structure of the cable 2, but rather to create a fit between the positioning protrusion 231 and the limiting groove 241 that can adapt to bending deformation.

[0048] Through the aforementioned bending process, the positioning protrusion 231 and the limiting groove 241 form a non-fixed bending fit. Specifically, the limiting groove 241 can still restrict the position of the positioning protrusion 231, keeping the shielding layer 23 relatively positioned within the outer sheath 24 and preventing disordered displacement of the shielding layer 23 relative to the adjacent insulation layer 22. Simultaneously, when the cable 2 is subjected to bending, the positioning protrusion 231 can adaptively move within the constraint range of the limiting groove 241, allowing the shielding layer 23 to deform and adapt to the bending state of the cable 2. Thus, the shielding layer 23 can both maintain its covering position of the adjacent insulation layer 22 and adapt to the bending wiring state of the compactly arranged cables 2 during the use of the endoscope imaging module.

[0049] Furthermore, the cooled cable 2 enters the conveyor 3 and then the bending device 4, where it is bent. The conveyor 3 continuously transports the cable 2 between the cooling mechanism 6 and the bending device 4, ensuring a stable transport state for the cable 2 and guaranteeing the continuity and consistency of the subsequent bending process. The conveyor 3 includes a first drive assembly 31, a first conveying roller 32, a second conveying roller 33, a first housing 34, a second housing 35, a mounting body 36, and a guide sleeve 37. The first housing 34 and the second housing 35 are fastened together, forming an installation space between them. The first conveying roller 32 is disposed within this installation space and connected to the first drive assembly 31, enabling the first drive assembly 31 to drive the first conveying roller 32 to rotate. The second conveying roller 33 is rotatably mounted on the mounting body 36, which is disposed within the installation space, allowing the second conveying roller 33 to be positioned opposite the first conveying roller 32. A conveying space for conveying the cable 2 is formed between the first conveying roller 32 and the second conveying roller 33. A guide sleeve 37 is disposed within the installation space, and the cable 2 passes through the guide sleeve 37 to maintain a predetermined conveying direction during the conveying process. During use, the first drive assembly 31 drives the first conveying roller 32 to rotate. The first conveying roller 32 and the second conveying roller 33 are located on the upper and lower sides of the cable 2, respectively, and the cable 2 passes through the conveying space between the first conveying roller 32 and the second conveying roller 33. When the first conveying roller 32 rotates, it conveys the cable 2, causing it to move towards the guide sleeve 37. The second conveying roller 33 rotates along with the cable 2 during its movement, and together with the first conveying roller 32, provides stable guidance and support for the cable 2. After the cable 2 enters the guide sleeve 37, the guide sleeve 37 constrains the conveying direction of the cable 2, allowing the cable 2 to be smoothly output from the conveyor 3 and enter the bending processing device 4. Thus, the conveyor 3 can continuously convey the cooled and shaped cable 2 and provide a stable feed state for subsequent bending processing.

[0050] The first drive assembly 31 includes a first motor 311, a first gear 312, and a second gear 313. The first motor 311 is mounted on the first housing 34, and its output end is connected to the first gear 312, which extends into the mounting space formed between the first housing 34 and the second housing 35. The second gear 313 is fixedly connected to the first conveying roller 32 and rotatably disposed within the mounting space, with the first gear 312 and the second gear 313 meshing together. Thus, the rotational power output by the first motor 311 can be transmitted sequentially to the first conveying roller 32 via the first gear 312 and the second gear 313, providing the first conveying roller 32 with a stable rotational driving force.

[0051] During operation, the first motor 311 drives the first gear 312 to rotate. The first gear 312, through its meshing with the second gear 313, drives the second gear 313 to rotate. The second gear 313 then drives the first conveying roller 32, which is fixedly connected to it, to rotate synchronously. Since the first conveying roller 32 and the second conveying roller 33 are located on the upper and lower sides of the cable 2, respectively, the first conveying roller 32 can apply a force along the conveying direction to the cable 2 when it rotates. The second conveying roller 33 rotates with the cable 2 and, together with the first conveying roller 32, defines the conveying position of the cable 2, thereby enabling the cable 2 to travel smoothly within the conveying space and enter the subsequent bending processing device 4 through the guide sleeve 37.

[0052] The bending device 4 includes a frame 41, two cable guide tubes 42, two cable pulleys 43, a second drive assembly 44, and two cable pulley seats 45. The two cable guide tubes 42 are fixedly connected to the frame 41 and define the cable 2's direction of travel when entering and leaving the bending device 4, ensuring a relatively stable transport path for the cable 2 before and after passing the cable pulleys 43. The frame 41 has two connecting seats 411, and the two cable pulley seats 45 are slidably connected to each of the two connecting seats 411. The two cable pulleys 43 are rotatably mounted on the two cable pulley seats 45, allowing the cable pulleys 43 to move relative to the connecting seats 411 with the cable pulley seats 45, and providing rolling support for the cable 2 when it passes over the cable pulleys 43.

[0053] Two spools 43 are located between two cable guide tubes 42. The cable 2 passes through the two cable guide tubes 42 and then around the two spools 43 before connecting to the winding machine. By having the cable 2 bypass the two spools 43, a curved path can be formed between the two cable guide tubes 42, instead of passing directly through the bending processing device 4 in a straight line. Under the action of the rotating support of the spools 43, the cable 2 can continuously pass through the curved area during the conveying and winding process, and generate controlled deformation in the curved path, thereby adjusting the contact fit between the positioning protrusion 231 and the limiting groove 241 in the curved state.

[0054] The second drive assembly 44 is connected to two sheave seats 45 respectively, and is used to drive the two sheave seats 45 to move closer or further apart. When the two sheave seats 45 move closer or further apart, the relative position between the two sheaves 43 changes accordingly, and the bending path of the cable 2 as it passes around the two sheaves 43 also changes accordingly. Thus, the second drive assembly 44 can change the degree of bending of the cable 2 in the bending processing device 4 by adjusting the positional relationship of the two sheaves 43, so that the cooled and shaped cable 2 produces a bending deformation suitable for forming a non-fixed bending fit when passing through the sheaves 43.

[0055] The second drive assembly 44 includes an electric push rod 441, a transmission rod 442, and two connecting arms 443. The electric push rod 441 is mounted on the frame 41, and the transmission rod 442 is rotatably mounted on the frame 41, with a drive groove 4421 formed on the transmission rod 442. A connecting shaft 4411 is provided at the output end of the electric push rod 441, extending into the drive groove 4421 and slidably connected to it. The two connecting arms 443 are rotatably connected to both ends of the transmission rod 442, with the end of the connecting arm 443 away from the transmission rod 442 rotatably connected to the reel seat 45. Through the above connection relationship, the linear extension and retraction motion of the electric push rod 441 can be converted into the rotational motion of the transmission rod 442 via the connecting shaft 4411 and the drive groove 4421, and the transmission rod 442 then drives the two reel seats 45 to move relative to each other through the two connecting arms 443.

[0056] When the output end of the electric push rod 441 extends, the connecting shaft 4411 moves linearly with the electric push rod 441 and slides within the drive groove 4421. Due to the mating relationship between the connecting shaft 4411 and the drive groove 4421, the connecting shaft 4411 can push the transmission rod 442 to rotate around its rotational mounting position via the drive groove 4421 during movement. After the transmission rod 442 rotates, it drives the two connecting arms 443 to move synchronously. The two connecting arms 443 further drive the two sheave seats 45 to move away from each other. As the two sheave seats 45 move away from each other, the distance between the two sheaves 43 increases, the path of the cable 2 around the two sheaves 43 is lengthened, and the cable 2 forms a more pronounced bend between the two cable conduits 42.

[0057] Through the aforementioned bending process, the cable 2 can continuously undergo bending deformation in the transport direction when passing through the bending device 4. Since the outer sheath 24 has already been cooled and shaped in the cooling mechanism 6, and the positioning protrusion 231 is at least partially accommodated within the limiting groove 241, the positioning protrusion 231 can adaptively displace relative to the outer sheath 24 within the constraint range of the limiting groove 241 during the bending process of the cable 2. This allows the shielding layer 23 to adapt to the bending deformation of the cable 2 while maintaining its relative positioning. This process does not completely separate the outer sheath 24 from the shielding layer 23, but rather forms a non-fixed bending fit between the positioning protrusion 231 and the limiting groove 241 that can adapt to the bending state. This avoids the problem of deformation inconsistency during the bending process after the shielding layer 23 and the outer sheath 24 are completely fixed, and helps to maintain the covering position of the shielding layer 23 relative to the adjacent insulation layer 22.

[0058] It also includes a rotary drive mechanism 5, which drives the bending processing device 4 to rotate relative to the conveying direction of the cable 2, thereby changing the direction in which the wire pulley 43 applies bending force to the cable 2. The rotary drive mechanism 5 includes a base 51, a second motor 52, a driving pulley 53, a driven pulley 54, and a transmission belt 55. Two cable conduits 42 are connected to the base 51, allowing the frame 41 to form a rotatable connection with the base 51 through the cable conduits 42. The second motor 52 is mounted on the base 51, and its output end is connected to the driving pulley 53. The driven pulley 54 is fixedly mounted on the cable conduit 42, and the transmission belt 55 is wound between the driving pulley 53 and the driven pulley 54, so that the rotational power output by the second motor 52 can be transmitted to the cable conduit 42 through the driving pulley 53, the transmission belt 55, and the driven pulley 54.

[0059] During operation, after the second motor 52 is started, it drives the driving pulley 53 to rotate, which in turn drives the driven pulley 54 to rotate via the transmission belt 55. Since the driven pulley 54 is fixedly mounted on the cable tray 42, its rotation causes the cable tray 42 to rotate synchronously. Because the cable tray 42 is connected to the frame 41, its rotation causes the frame 41 to rotate relative to the base 51, thus causing the wire wheel 43, wire wheel seat 45, and second drive assembly 44 mounted on the frame 41 to change their spatial orientation synchronously with the frame 41. Because the cable 2 continuously passes through the two cable trays 42 and around the two wire wheels 43 during processing, the direction of action of the wire wheel 43 relative to the cable 2 changes when the frame 41 rotates under the drive of the rotary drive mechanism 5. In other words, cable 2 continues to be transported along the path defined by conduit 42, while the direction of the bending action applied to cable 2 by reel 43 changes with the rotation of frame 41, so that cable 2 is no longer bent only in a single direction, but can be bent in different spatial directions. By setting a rotary drive mechanism 5, bending processing device 4 can change the direction of bending action during the continuous transport of cable 2, so that cable 2 forms bending deformations in different directions when passing reel 43. This bending deformation can cause the positioning protrusion 231 to make adaptive displacement relative to outer sheath 24 within the constraint range of limiting groove 241, so that shielding layer 23 is relatively positioned within outer sheath 24 while adapting to the bending state of cable 2 in different directions. Thus, a non-fixed bending fit can be formed between positioning protrusion 231 and limiting groove 241, improving the structural adaptability of compact side-by-side cable 2 in the bending wiring environment of endoscope imaging module.

[0060] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An endoscopic imaging module based on a compact side-by-side cable (2), characterized in that, Includes an image acquisition component (1) and a cable (2); The cable (2) includes multiple conductors (21), an insulation layer (22), a shielding layer (23), and an outer sheath; Multiple conductors (21) are arranged side by side along the width direction of the cable (2), and the outer side of each conductor (21) is covered with the insulation layer (22) to form multiple insulated wire cores arranged side by side; The shielding layer (23) is disposed on the outside of the insulated wire core. The shielding layer (23) includes a plurality of isolation shielding parts (232). Each isolation shielding part (232) is disposed between two adjacent insulated wire cores so that two adjacent conductors (21) share the same isolation shielding part (232). The outer layer is covered on the outside of the shielding layer (23); One end of the cable (2) is connected to the image acquisition component (1) for transmitting power supply signals and / or image data signals to the image acquisition component (1).

2. The endoscopic imaging module based on a compact side-by-side cable (2) according to claim 1, characterized in that, The image acquisition component (1) includes an image sensor (11) and a circuit connection part (12), and the plurality of conductors (21) of the compact side-by-side cable (2) are electrically connected to the circuit connection part (12) respectively; The image sensor (11) includes a camera (111) and a light source (112).

3. The endoscopic imaging module based on a compact side-by-side cable (2) according to claim 1, characterized in that, The outer side of the shielding layer (23) is provided with a positioning protrusion (231), and the inner wall of the outer layer is provided with a limiting groove (241) corresponding to the positioning protrusion (231). The positioning protrusion (231) is at least partially located in the limiting groove (241).

4. The endoscopic imaging module based on a compact side-by-side cable (2) according to claim 3, characterized in that, The outer surface of the positioning protrusion (231) is in contact with the groove wall of the limiting groove (241). When the compact side-by-side cable (2) is subjected to bending, the positioning protrusion (231) can be adaptively displaced relative to the groove wall of the limiting groove (241) within the constraint range of the limiting groove (241) so that the shielding layer (23) and the outer sheath form a non-fixed bending fit and maintain the covering position of the common shielding layer (23) relative to the adjacent insulation layer (22).

5. The endoscopic imaging module based on a compact side-by-side cable (2) according to claim 1, characterized in that, The multiple insulated wire cores are divided into multiple core groups along the width direction of the cable (2), and each core group includes at least two adjacent insulated wire cores; the shielding layer (23) covers each of the insulated wire cores in a corresponding core group.

6. The endoscopic imaging module based on a compact side-by-side cable (2) according to claim 1, characterized in that, The outer sheath is made of ethylene-tetrafluoroethylene copolymer, perfluoroethylene-propylene copolymer, tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, or thermoplastic polyurethane elastomer.

7. The endoscopic imaging module based on a compact side-by-side cable (2) according to claim 1, characterized in that, The insulating layer (22) is made of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, perfluoroethylene propylene copolymer, ethylene-tetrafluoroethylene copolymer or polyimide.

8. The endoscopic imaging module based on a compact side-by-side cable (2) according to claim 1, characterized in that, The conductor (21) is formed by stranding silver-plated copper alloy wire, tin-plated copper alloy wire or copper-silver alloy wire.

9. A method for fabricating an endoscopic imaging module based on a compact side-by-side cable (2), characterized in that, include: The method for preparing the endoscopic imaging module based on the compact side-by-side cable (2) according to any one of claims 1 to 8 includes the following steps: Step A. Prepare insulated wire cores and arrange them side by side along the width direction; Step B. A common shielding cover is formed on the outside of at least two adjacent insulated cores, such that the same common shielding cover spans across the outside of at least two adjacent insulated cores, and at least two adjacent conductors (21) share the same common shielding cover; Step C. The co-shielding covering part with positioning protrusions (231) is introduced into the outer sheath forming head. The outer sheath material is plasticized by the extruder and then conveyed to the outer sheath forming head. It is continuously extruded through the forming flow channel of the outer sheath forming head to cover the outside of the co-shielding covering part. The molten outer sheath material is cooled and shaped into an outer sheath on the outside of the co-shielding covering part to obtain the cable (2). During the continuous extrusion and coating process of the outer material, the inner wall of the outer material forms a limiting groove (241) at the position corresponding to the positioning protrusion (231) along the outer contour of the positioning protrusion (231), and the positioning protrusion (231) is at least partially accommodated in the limiting groove (241).

10. The method for fabricating an endoscopic imaging module based on a compact side-by-side cable (2) according to claim 9, characterized in that, It also includes step D. bending the cooled and shaped compact side-by-side cable (2) so that the compact side-by-side cable (2) deforms during the bending process and the positioning protrusion (231) can move relative to the outer casing within the constraint range of the limiting groove (241).

Images