A lens module for an endoscope and an endoscope

Abstract

The utility model discloses a lens module and endoscope for endoscope, including lens and two LED lamps, the rear end of lens is provided with four soldering pads, the rear end of every LED lamp all sets up two electrodes, three soldering pads all have welded first wire, all electrodes all have welded second wire, first wire and second wire outside are provided with shielding layer, the shielding layer is in first wire and second wire welding after through the mode of around the package and is arranged outside first wire and second wire, the insulating layer is provided outside shielding layer. The utility model has the advantages of: it does not adopt the coaxial line prepared in advance, but is through first welding single wire, and then the mode of winding prepares the coaxial line, therefore, single wire welding can not be interfered by other wires, provides the possibility for realizing automatic welding, the coaxial line is prepared after welding, can replace tensile wire, shielding layer and insulating layer as needed to adapt to different market demand.

Description

Technical Field

[0001] This utility model relates to the field of endoscopes, and more particularly to an endoscope lens module and an endoscope. Background Technology

[0002] As a key device for modern medical diagnosis and minimally invasive treatment, the imaging quality and reliability of the endoscope's front-end lens module are of paramount importance. This module typically integrates a miniature image sensor (such as CMOS) and LED beads for illumination of the field of view. Due to their advantages such as small size, high brightness, and low power consumption, LED beads have become the mainstream solution for endoscopic illumination.

[0003] Currently, the industry commonly uses a traditional manual wire stripping and soldering process for the electrical connection between LED beads and miniature coaxial cables in the endoscope front-end module. The miniature coaxial cables are pre-fabricated. Specifically, this traditional process includes the following steps: Stripping: The operator first manually strips the insulation layer outside the miniature coaxial cable to separate the metal wire inside, exposing the metal wire which is only about 1-2 mm long; and then burns off the insulation layer at the front of the metal wire.

[0004] Positioning: Precisely align the exposed wires with the tiny electrode pads of the LED beads and lens, and temporarily fix them with the help of auxiliary tools (such as tweezers).

[0005] Manual soldering: Under a microscope or high-powered magnifying glass, a pointed soldering iron and a small amount of solder wire are used to manually complete the soldering work between the wires, LED beads and lens electrodes.

[0006] In the above process, wire stripping and welding can only be done manually; especially the welding process, because the structure of this lens module is affected by the mutual interference between the manually separated wires, it is difficult to achieve automated welding, so it can only rely heavily on skilled workers, which seriously restricts the production efficiency, consistency and reliability of endoscopes. Utility Model Content

[0007] The purpose of this utility model is to provide an endoscope lens module and an endoscope that solve or partially solve the above-mentioned technical problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution: An endoscope lens module includes a lens and two LEDs; four pads are provided at the rear end of the lens, two electrodes are provided at the rear end of each LED, three of the pads are soldered with a first wire, and all the electrodes are soldered with a second wire; a shielding layer is provided outside the first and second wires, and the shielding layer is provided by wrapping around the first and second wires after they are soldered; an insulating layer is provided outside the shielding layer.

[0009] Preferably, the shielding layer is aluminum foil, copper foil, silver foil or metal woven mesh.

[0010] Preferably, the insulating layer is formed by wrapping a strip of insulating material around the outside of the shielding layer.

[0011] Preferably, the insulating layer is an insulating tube made of heat-shrinkable material that is sleeved outside the shielding layer.

[0012] Preferably, a plurality of tensile ropes are provided between the first conductor and the second conductor along their length.

[0013] Preferably, all the first and second conductors are intertwined by a cabling method.

[0014] This utility model also provides an endoscope, which includes the aforementioned endoscope lens module.

[0015] The beneficial effects of this utility model are: it does not use pre-made coaxial cables, but prepares coaxial cables by first welding a single wire and then winding it; therefore, when welding a single wire, it is not affected by other wires, which makes it possible to realize automated welding; the coaxial cable is prepared after welding, so the tensile wire, shielding layer and insulation layer can be replaced as needed to adapt to different market demands. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the endoscope lens module after welding. Figure 2 It is a cross-sectional structural diagram of the conductor after it has been cabled, wrapped with shielding and insulation layers; Figure 3 This is a schematic diagram of the lens fixture used in one embodiment; Figure 4 This is a schematic diagram of the LED fixture used in one embodiment; Figure 5 This is a flowchart of the old and new preparation processes for this utility model. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0018] In the description of this utility model, it should be noted that the terms "inner", "outer", "upper", "lower", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] like Figures 1 to 4 As shown, an endoscope lens module of this utility model includes a lens 10 and two LED lights 12; the two LED lights 12 are symmetrically arranged on both sides of the lens 10. Four solder pads 14 are provided at the rear end of the lens 10 for transmitting power and signals; two electrodes 16 are provided at the rear end of each LED light 12 for transmitting power. First wires 18 are soldered to each of the three solder pads 14, and second wires 20 are soldered to all electrodes 16. A shielding layer 22 is provided outside the first wires 18 and the second wires 20, which is formed by wrapping around the first wires 18 and the second wires 20 after soldering; an insulating layer 24 is provided outside the shielding layer 22. Several tensile ropes (not shown) are arranged along the length of the first wires 18 and the second wires 20. All the first wires 18 and the second wires 20 are intertwined by cabling.

[0020] The shielding layer 22 is made of common shielding materials such as aluminum foil, copper foil, silver foil, silver-plated copper, and metal braided mesh.

[0021] The insulation layer 24 is made of long strips of insulating material wrapped around the shielding layer 22.

[0022] Alternatively, the insulation layer 24 is an insulating tube made of heat-shrinkable material that is sleeved outside the shielding layer 22.

[0023] This utility model also provides an endoscope (not shown) that includes the above-mentioned lens module.

[0024] The lens module of this utility model is manufactured according to the following method, including a lens welding fixture and an LED welding fixture, and includes the following steps: S1. Prepare lens 10, 2 LED lights 12 and 7 wires 26, and burn off the insulating paint on the wires 26, exposing 1-2mm of the head; S2. Weld lens 10 onto the lens welding fixture: S2-1. Fix the lens 10 on the lens clamp 28 of the lens fixture. Manually operate the first wire clamp 30 to fix a wire 26. The head of the wire 26 is facing the rear end of the lens 10. One of the solder pads 14 of the lens 10 is in the soldering position. The lens clamp 28 is a rotatable disc structure with the lens 10 located in the middle. The lens clamp 28 is a common indexing plate that can be driven to rotate 90° each time by conventional drive methods such as cylinders, motors and gears. S2-2. The first drive mechanism (not shown, a lead screw or electric cylinder driven by a servo motor can be selected) drives the first wire clamp 30 to move forward until the head of the wire 26 contacts the pad 14 of the lens 10; during this process, the camera sensor 32 takes a picture of the head of the wire 26 and performs image recognition to confirm whether it contacts the pad 14. S2-3. The three-axis robotic arm drives the welding gun 34 to align with the welding pad 14 for welding operations; after completion, the first wire clamp 30 is manually operated to replace the wire 26, and the lens clamp 28 is rotated so that the other welding pad 14 of the lens 10 is in the position to be welded. S2-4. Repeat steps S2-2 and S2-3 until the soldering of the three wires 26 is completed; S3. Welding LED lights 12: S3-1. Fix an LED lamp 12 on the LED fixture 36 of the LED jig, with one of the electrodes 16 in the position to be soldered; manually operate the second wire clamp 38 to fix a wire 26, with the head of the wire 26 facing the rear end of the LED lamp 12, and one of the electrodes 16 of the LED lamp 12 in the position to be soldered. S3-2. The second drive mechanism (not shown, a lead screw or electric cylinder driven by a servo motor can be selected) drives the second wire clamp 38 to move forward until the head of the wire 26 contacts the electrode 16 of the LED lamp 12; during this process, the camera sensor 32 takes a picture of the head of the wire 26 and performs image recognition to confirm whether it contacts the electrode 16. S3-3. The three-axis robotic arm drives the welding gun 34 to align with the welding pad 14 for welding operations; after completion, the second wire clamp 38 is manually operated to replace the wire 26; the second wire clamp 38 is moved so that the other electrode 16 of the LED lamp 12 is in the position to be welded. S3-4. Repeat steps S3-2 and S3-3 until the other wire 26 is soldered. S4. Cable Formation: Fix the welded lens 10 and 2 LED lights 12, arrange 7 wires 26 in the same direction, insert an anti-tension rope (not shown) in the middle, and then rotate the wires 26 and the anti-tension rope clockwise to form a spiral cable bundle. S5. Shielding layer: Fix one end of the strip-shaped shielding layer 22 to the end of the wire harness near the lens 10, wrap the shielding layer 22 clockwise around the wire harness, and fix it. S6. Add an insulating layer: Fix one end of the strip-shaped insulating material to the end of the wire harness near the lens 10, wrap the insulating material clockwise around the wire harness, and secure it. The insulating layer can also be prepared using heat-shrink tubing or injection molding.

[0025] In this invention, the conductor 26 is first soldered to the pad 14 and the electrode 16, and then cabled, and the shielding layer 22 and the insulating layer 24 are wrapped to form a coaxial cable. Compared with the traditional method of using ready-made coaxial cables, this method of stripping the wires before soldering has the following advantages: during soldering, the conductors 26 do not interfere with each other, and automated soldering can be achieved with customized special fixtures and welding robots, thereby solving the pain points of high difficulty, poor consistency and low efficiency of manual soldering. This invention provides the possibility of automated manufacturing through structural changes. To this end, this invention provides a structural schematic diagram of one embodiment of the matching special fixture, illustrating one possible way to realize the manufacturing method of this invention, which is not the only way to realize it; the structure of this special fixture can be designed by those skilled in the art based on the above requirements, and is not the innovation of this invention, therefore its detailed structure and drive mechanism are described. In addition, the cabling and wrapping operations of coaxial cables are mature technologies in the industry, and there are corresponding equipment, therefore they are not described in detail.

[0026] See appendix Figure 5 This demonstrates the difference in processing flow between the old and new processes. The preparation process corresponding to the structure of this utility model can avoid the biggest pain points, namely the difficulty in wire stripping and welding, which can only be done manually, thus providing the possibility for automatic welding. Compared with welding, other processes have mature equipment and technology. Therefore, although the overall preparation process has more steps, they all have corresponding automated equipment, thus having advantages such as high efficiency and good consistency.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An endoscope lens module, comprising a lens and two LED lights; characterized in that: The lens has four pads at its rear end, and each LED has two electrodes at its rear end. Three of the pads are soldered with first wires, and all electrodes are soldered with second wires. A shielding layer is provided outside the first and second wires. The shielding layer is provided by wrapping around the first and second wires after they are soldered. An insulating layer is provided outside the shielding layer.

2. The endoscope lens module according to claim 1, characterized in that, The shielding layer is made of aluminum foil, copper foil, silver foil, or metal woven mesh.

3. The endoscope lens module according to claim 1, characterized in that, The insulating layer is formed by wrapping a strip of insulating material around the outside of the shielding layer.

4. The endoscope lens module according to claim 1, characterized in that, The insulating layer is an insulating tube made of heat-shrinkable material that is sleeved outside the shielding layer.

5. An endoscope lens module according to claim 1, characterized in that, Several tensile ropes are provided between the first conductor and the second conductor along their length.

6. The endoscope lens module according to claim 1, characterized in that, All of the first and second conductors are intertwined by a cabling method.

7. An endoscope comprising an endoscope lens module according to any one of claims 1 to 6.

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