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CN-122018140-A - Industrial endoscope

CN122018140ACN 122018140 ACN122018140 ACN 122018140ACN-122018140-A

Abstract

The invention discloses an industrial endoscope which comprises an operating handle, an imaging optical fiber bundle and a flexible base tube, wherein the imaging optical fiber bundle penetrates through the inside of the flexible base tube, a traction guide assembly comprises a plurality of partition units which are distributed at intervals along the axial direction of the flexible base tube, each partition unit comprises a tubular body and a traction channel, the tubular body is fixedly sleeved on the outer wall of the flexible base tube, the distal ends of the four traction wires are fixed at the head end of the flexible base tube, and the proximal ends of the four traction wires are connected to the operating handle. The invention uses thin wall pipe to bond directly, to control the external diameter of four-direction guiding mechanism within 0.96mm, to effectively use part of external diameter to 0.91-0.95 mm, to realize deflection in four directions, with deflection angle above 45 degree, to expand the field of view of ultra-thin endoscope, and uses the self-lubricating property of polyimide material and special bevel mouth protection pipe design, to move the traction wire, with smooth hand feeling.

Inventors

  • CAI KEJUN

Assignees

  • 徐州市时代光电科技有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (9)

  1. 1. An industrial endoscope comprises an operating handle (7) and an imaging optical fiber bundle, and is characterized by further comprising a flexible base pipe (1), wherein the flexible base pipe is a tubular member with elasticity and is used as a main framework of the endoscope, and the imaging optical fiber bundle is arranged inside the flexible base pipe (1) in a penetrating way; The traction guide assembly comprises a plurality of partition units which are distributed at intervals along the axial direction of the flexible base pipe (1), wherein each partition unit comprises a tubular body (2) fixedly sleeved on the outer wall of the flexible base pipe (1), and a traction channel arranged between the tubular body (2) and the flexible base pipe (1); The four traction wires (3) respectively penetrate through the traction channels and are distributed at intervals of 90 degrees in the circumferential direction of the flexible base pipe (1), the distal ends of the traction wires (3) are fixed at the head end of the flexible base pipe (1), and the proximal ends of the traction wires are connected to an operation handle; the outer coating layer is sleeved outside the traction guide assembly; the head end of the flexible base pipe (1) is provided with a head end fixing sleeve, the ends of the four traction wires (3) are packaged between the head end fixing sleeve and the pipe wall of the flexible base pipe (1) through an adhesive, and the ends of the traction wires (3) are not exposed.
  2. 2. An industrial endoscope as described in claim 1 wherein said partition unit has a maximum outside diameter of no more than 0.96mm.
  3. 3. An industrial endoscope according to claim 1, characterized in that the flexible base tube (1) is a nickel-titanium alloy tube with shape memory function, the outer diameter of which is 0.60mm-0.70mm, and the wall thickness of which is 0.02mm-0.04mm.
  4. 4. An industrial endoscope according to claim 1, characterized in that the traction channel comprises a small diameter protective tube (5) which is arranged inside the tubular body (2) and is fixed by gluing along the axial direction, the inner diameter of the small diameter protective tube (5) is larger than the diameter of the traction wire (3), two end faces of the small diameter protective tube (5) are cut into inclined planes, and the included angle of the inclined planes is preferably 45 degrees.
  5. 5. An industrial endoscope according to claim 1, characterized in that the partition units are arranged in a variable pitch arrangement along the axial direction of the flexible base tube (1), wherein the pitch between adjacent partition units is a first distance in the non-bending region near the handle, the pitch between adjacent partition units is gradually increased to a second distance and a third distance in the bendable region near the head end, the first distance is 2mm, the second distance is 4mm-5mm, and the third distance is 8mm.
  6. 6. An industrial endoscope according to claim 1, characterized in that the four traction wires (3) are distributed in four directions of up, down, left and right, the tubular body (2) comprises a first direction partition for fixing traction channels in the left and right directions and a second direction partition for fixing traction channels in the up and down directions, and the first direction partition and the second direction partition are alternately arranged on the flexible base tube (1).
  7. 7. An industrial endoscope according to claim 1, characterized in that the outer covering comprises a metal netting layer (4), the metal netting layer (4) being woven from stainless steel flat wires having a thickness of about 0.012mm and a width of about 0.063mm, the proximal end of the metal netting layer (4) being welded to a spring tube (6) for providing tension buffering at the operating handle.
  8. 8. An industrial endoscope according to claim 1, characterized in that the pulling wire (3) is a tungsten alloy wire with a diameter of 0.07mm.
  9. 9. An industrial endoscope according to claim 1, characterized in that the tubular body (2) is made of polyimide material, with an inner diameter of about 0.8mm.

Description

Industrial endoscope Technical Field The invention relates to the technical field of industrial and medical endoscopes, in particular to an industrial endoscope. Background With the development of precision manufacturing industry (such as aeroengine blade air film hole detection) and minimally invasive medical technology, the demand for ultra-fine endoscopes is increasingly urgent. In many application scenarios, the diameter of the probe hole is smaller than 1.0mm, the internal structure is complex, and the endoscope is required to be not only 'in and out', but also 'see all' in the interior, so that the endoscope is required to have a flexible guiding function (namely, the probe can be controlled to bend up and down and left and right). However, existing endoscopic guidance techniques rely primarily on "snake bone" structures. Conventional snake bone structures are typically formed from multiple metal links connected by rivets or pins, or a laser cut metal tube structure. Size limitation traditional riveted snake bone is limited by processing technology and mechanical strength, and the diameter is difficult to be below 1.0mm. Even if the laser cutting technology is adopted, when the diameter is smaller than 1mm, the reserved connecting beam is too slender, and metal fatigue fracture is extremely easy to occur in repeated bending. The structure is complex, in an extremely fine space (for example, the diameter of 0.9 mm), the imaging optical fiber and the illumination optical fiber are contained, and four traction steel wires are arranged, so that the space is insufficient and the outer diameter exceeds the standard due to the traditional independent guide tube design. The prior art is blank that most of ultrafine endoscopes with diameters below 1mm in the current market are unguided hose mirrors or simple mirrors with single bending direction, and cannot realize precise control (four-way swinging) in all directions. Therefore, how to design a structure, on the premise of ensuring that the outer diameter is smaller than 1mm (even smaller than 0.96 mm), the four-way deflection angle is larger than 45 degrees, and the structure has enough durability and stability, which is a technical problem to be solved urgently by the technicians in the field. Disclosure of Invention The invention aims to provide an industrial endoscope, which adopts the design concept of 'differential control line snake bone', and breaks through the size limitation of the traditional mechanical snake bone by utilizing the combination of a flexible base pipe and a segmented partition. In order to solve the technical problems, the invention adopts the following technical scheme: an industrial endoscope comprises an operating handle, an imaging optical fiber bundle and a flexible base tube, wherein the flexible base tube is a tubular member with elasticity and is used as a main skeleton of the endoscope, and the imaging optical fiber bundle is arranged inside the flexible base tube in a penetrating way; the traction guide assembly comprises a plurality of partition units which are distributed at intervals along the axis of the flexible base pipe, wherein each partition unit comprises a tubular body fixedly sleeved on the outer wall of the flexible base pipe and a traction channel arranged between the tubular body and the flexible base pipe; The four traction wires respectively penetrate through the traction channel and are distributed at intervals of 90 degrees in the circumferential direction of the flexible base pipe, the distal ends of the traction wires are fixed at the head end part of the flexible base pipe, and the proximal ends of the traction wires are connected to the operating handle; the outer coating layer is sleeved outside the traction guide assembly; The head end of the flexible base pipe is provided with a head end fixing sleeve, the ends of the four traction wires are packaged between the head end fixing sleeve and the pipe wall of the flexible base pipe through an adhesive, the ends of the traction wires are not exposed, and the flexible base pipe is forced to generate micro bending at a gap between adjacent partition units by pulling the traction wires in any direction, so that macroscopic deflection is formed in an accumulated mode. Preferably, the maximum outer diameter of the partition unit is not more than 0.96mm. Preferably, the flexible base pipe is a nickel-titanium alloy pipe with a shape memory function, the super elasticity and the memory property of the flexible base pipe are used as rebound supports, the outer diameter of the flexible base pipe is 0.60mm-0.70mm, the wall thickness of the flexible base pipe is 0.02mm-0.04mm, and the flexible base pipe can automatically recover to a straight line state after traction force is removed. Preferably, the traction channel comprises a small-diameter protection tube which is arranged inside the tubular body and is fixed in an adhesive manner along the axial direction, t