Dual-plane adjustable angle fiber endoscope having disposable end

Abstract

A dual-plane adjustable-angle fiber endoscope having a disposable end, which relates to the field of medical devices and is suitable for patient internal examination scenarios to reduce visual blind spots. The fiber endoscope comprises: a handle (10), the handle (10) having a receiving cavity (101) inside, and a side wall of the handle (10) being provided with a first operation port (102) and a second operation port (103); an endoscope tube (11), a first end of the endoscope tube (11) being connected to the handle (10), a second end of the endoscope tube (11) being provided with a camera unit, the wiring of the camera unit passing within the endoscope tube (11) and extending into the handle (10), and the second end of the endoscope tube (11) being bendable; a first traction mechanism (12), an operating end (1211) of the first traction mechanism (12) corresponding to the first operation port (102), and the first traction mechanism (12) being connected to a first traction line and a second traction line; and a second traction mechanism (13), an operating end (1311) of the second traction mechanism (13) corresponding to the second operation port (103), and the second traction mechanism (13) being connected to a third traction line and a fourth traction line.

Description

A disposable end-mounted dual-plane adjustable angle fiber endoscope

[0001] This application claims priority to Chinese invention patent application No. 202411488357.9, filed on October 23, 2024, entitled "A Disposable End-Front-Plane Adjustable Angle Fiber Endoscope", and to Chinese utility model patent application No. 202422573021.4, filed on October 23, 2024, entitled "A Disposable End-Front-Plane Adjustable Angle Fiber Endoscope", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of medical device technology, specifically to a disposable end-effector with adjustable angle and dual-plane angle. Background Technology

[0003] As a medical diagnostic instrument, fiber optic endoscopes can enter the body's natural passages to examine and even treat lesions in the nose, throat, and digestive tract. Currently, common fiber optic endoscopes mainly consist of a handle assembly and an insertion section. The insertion section is used to insert into body cavities for examination or treatment, while the handle assembly controls the insertion section's bending and rotation via internal traction components.

[0004] Existing fiber optic endoscopes only allow for bending in a single plane at the insertion end. In complex cavitary environments, these endoscopes are prone to creating blind spots. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a disposable end-mounted dual-plane adjustable angle fiber endoscope that can reduce blind spots in the field of vision.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] This invention provides an end-mounted dual-plane adjustable angle fiber endoscope, comprising: a handle, the handle having a receiving cavity inside, and a first operating port and a second operating port on the side wall of the handle; a tube, the first end of the tube being connected to the handle, the second end of the tube being provided with a camera unit, the connecting wire of the camera unit passing through the tube and extending into the handle; the second end of the tube being flexible; and a first traction mechanism, the first traction mechanism being disposed in the receiving cavity inside the handle, the operating end of the first traction mechanism corresponding to the first operating port. The system includes a first traction wire and a second traction wire, both of which pass through the endoscope tube and are connected to the second end of the endoscope tube to control the second end of the endoscope tube to bend positively or negatively in a first direction. A second traction mechanism is located in a receiving cavity inside the handle, with its operating end corresponding to the second operating port. This second traction mechanism is connected to a third traction wire and a fourth traction wire, both of which pass through the endoscope tube and are connected to the second end of the endoscope tube to control the second end of the endoscope tube to bend positively or negatively in a second direction; wherein the second direction is perpendicular to the first direction.

[0008] Optionally, the first end of the endoscope tube is detachably connected to the handle, making the endoscope tube a disposable endoscope tube. After one clinical use, it can be removed from the handle and discarded, and then replaced with a new endoscope tube.

[0009] Optionally, the first traction mechanism includes: a first rotating shaft rotatably disposed within the handle; a first operating member connected to the first rotating shaft and capable of driving the first rotating shaft to rotate, wherein the manual operating end of the first operating member corresponds to and protrudes from the first operating port; a first spur gear fixed on the first rotating shaft; a first rack and a second rack arranged parallel to each other along the length direction of the handle and meshing with the first spur gear; a first guide member fixed within the handle, having a first guide hole and a second guide hole, wherein the first rack passes through the first guide hole and the second rack passes through the second guide hole; a first traction line connected to the first rack and the second traction line connected to the second rack.

[0010] Optionally, the second traction mechanism includes: a first bevel gear rotatably connected to the handle; a second operating member connected to the central shaft of the first bevel gear and located on a first side of the first bevel gear, the second operating member corresponding to and protruding from the second operating port; a second bevel gear meshing with the first bevel gear; a second spur gear fixedly connected to the central shaft of the second bevel gear and located on a second side of the second bevel gear; a third spur gear and a fourth spur gear meshing with the second spur gear respectively; A third rack and a fourth rack are arranged parallel to each other along the length of the handle between the third spur gear and the fourth spur gear. The tooth surfaces of the third rack and the fourth rack face away from each other. The third rack meshes with the third spur gear, and the fourth rack meshes with the fourth spur gear. A second guide member is fixed inside the handle and has a third guide hole and a fourth guide hole. The third rack passes through the third guide hole, and the fourth rack passes through the fourth guide hole. A third traction line is connected to the third rack, and a fourth traction line is connected to the fourth rack.

[0011] Optionally, the connections between the endoscope tube and the handle, between the first traction line and the first rack, between the second traction line and the second rack, between the third traction line and the third rack, and between the fourth traction line and the fourth rack are all detachable.

[0012] Optionally, the fiber endoscope further includes: a detachable connector, which is detachably connected to the handle, and the endoscope tube is fixedly connected to the detachable connector; a replacement compartment is provided at the tail end of the handle, and the detachable connector is disposed in the replacement compartment; the handle has a cover or door that can open the replacement compartment.

[0013] Optionally, the detachable connector is provided with a first guide groove, a second guide groove, a third guide groove, and a fourth guide groove; a fifth rack, which is disposed in the first guide groove and can move along the first guide groove, the fifth rack meshes with the first rack, and the first traction line is connected to the fifth rack; a sixth rack, which is disposed in the second guide groove and can move along the second guide groove, the sixth rack meshes with the second rack, and the second traction line is connected to the sixth rack; a seventh rack, which is disposed in the third guide groove and can move along the third guide groove, the seventh rack meshes with the third rack, and the third traction line is connected to the seventh rack; and an eighth rack, which is disposed in the fourth guide groove and can move along the fourth guide groove, the eighth rack meshes with the fourth rack, and the fourth traction line is connected to the eighth rack.

[0014] Optionally, the fiber endoscope further includes: a double spur gear, rotatably disposed within the handle, one of the spur gears meshing with the first rack and the second rack, and the other spur gear meshing with the fifth rack and the sixth rack; a fifth spur gear and a sixth spur gear, the fifth spur gear meshing with the third rack and the seventh rack respectively, and the sixth spur gear meshing with the fourth rack and the eighth rack respectively.

[0015] Optionally, the seventh and eighth racks are located between the fifth and sixth racks, and the plane in which the seventh and eighth racks are located is perpendicular to the plane in which the fifth and sixth racks are located.

[0016] Optionally, the seventh rack and the eighth rack are disposed between the fifth spur gear and the sixth spur gear, and the tooth surfaces of the seventh rack and the eighth rack face away from each other.

[0017] Optionally, the handle has a replacement compartment at its tail end, and the detachable connector is located in the replacement compartment; the handle has a cover or door that can open the replacement compartment.

[0018] Optionally, the detachable connector is tapered in shape, and the inner wall of the replacement compartment is adapted to the shape of the detachable connector.

[0019] Optionally, the first traction wire and the second traction wire are arranged at the position of the longitudinal center plane of the endoscope tube in the first direction; the third traction wire and the fourth traction wire are arranged at the position of the longitudinal center plane of the endoscope tube in the second direction.

[0020] Optionally, the plane containing the first traction line and the second traction line in the first traction mechanism is perpendicular to the plane containing the third traction line and the fourth traction line in the second traction mechanism.

[0021] Optionally, the plane containing the first and second traction lines in the first traction mechanism is parallel or coincident with the plane containing the second end of the endoscope tube that bends positively or negatively along the first direction; the plane containing the third and fourth traction lines in the second traction mechanism is parallel or coincident with the plane containing the second end of the endoscope tube that bends positively or negatively along the second direction.

[0022] Optionally, the first traction mechanism is provided with a first operating member, the manual operating end of the first operating member corresponding to and protruding from the first operating port; the operating direction of the manual operating end of the first operating member is parallel to or coincides with the plane where the second end of the endoscope tube is bent positively or negatively along the first direction; the second traction mechanism is provided with a second operating member, the second operating member corresponding to and protruding from the second operating port; the plane where the first operating port is located intersects with the plane where the second operating port is located; the operating direction of the second operating member is parallel to or coincides with the plane where the second end of the endoscope tube is bent positively or negatively along the second direction.

[0023] Optionally, the fiber endoscope further includes: a detachable connector, which is detachably connected to the handle, and the endoscope tube is fixedly connected to the detachable connector; a replacement compartment is provided at the tail end of the handle, and the detachable connector is disposed in the replacement compartment; the handle has a cover or door that can open the replacement compartment.

[0024] Optionally, the first operating member is moved through the first operating port to drive the first traction line and the second traction line, so as to control the second end of the endoscope tube to bend in the positive or negative direction along the first direction; the second operating member is moved through the second operating port to drive the third traction line and the fourth traction line, so as to control the second end of the endoscope tube to bend in the positive or negative direction along the second direction; the plane where the first operating port is located intersects the plane where the second operating port is located.

[0025] Optionally, the plane containing the first spur gear intersects with the plane containing the second bevel gear; the plane containing the third rack and the fourth rack intersects with the plane containing the first rack and the second rack.

[0026] Optionally, the first end of the endoscope tube is detachably connected to the handle via the detachable connector; the fifth rack engages with and is detachably connected to the first rack, the sixth rack engages with and is detachably connected to the second rack, the seventh rack engages with and is detachably connected to the third rack, and the eighth rack engages with and is detachably connected to the fourth rack, so as to realize the detachable connection between the detachable connector and the handle.

[0027] This invention provides a disposable end-mounted dual-plane adjustable angle fiber endoscope, including a handle and a tube connected to the handle. The end of the tube is equipped with a camera unit for imaging. A first traction mechanism and a second traction mechanism are arranged in a receiving cavity inside the handle. The first traction mechanism is connected to a first traction line and a second traction line to control the degree of bending of the tube in a first direction. The second traction mechanism is connected to a third traction line and a fourth traction line to control the degree of bending of the tube in a second direction. The first direction and the second direction are perpendicular to each other, thereby enabling dual-plane (the plane containing the first direction and the plane containing the second direction) observation angle operation during use, overcoming the blind spot disadvantage of traditional fiber endoscopes. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 is a schematic diagram of the overall structure of a fiber endoscope in one embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of the internal structure of a fiber endoscope in one embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of the detachable connector in a fiber endoscope according to an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of the structure of the first traction mechanism in a fiber endoscope according to an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of the structure of the first traction mechanism and the second traction mechanism in a fiber endoscope according to an embodiment of the present invention;

[0034] Figure 6 is a schematic diagram showing the relative positions of the fifth, sixth, seventh, and eighth racks in a fiber endoscope according to an embodiment of the present invention.

[0035] Figure 7 is a schematic diagram of the connection between the first operating element and the first traction structure in a fiber endoscope according to an embodiment of the present invention;

[0036] Figure 8 is a schematic diagram of a portion of the structure of the first traction mechanism and the second traction mechanism in a fiber endoscope according to an embodiment of the present invention.

[0037] Figure 9 is another schematic diagram of the structure of the first traction mechanism and the second traction mechanism in a fiber endoscope according to an embodiment of the present invention;

[0038] Figure 10 is a schematic diagram of the handle in a fiber endoscope according to an embodiment of the present invention. Detailed Implementation

[0039] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] The disposable end-mounted dual-plane adjustable angle fiber endoscope provided in this invention can solve the problem of observing complex cavity environments and help reduce blind spots.

[0042] The present invention will be further described in detail below with reference to the accompanying drawings.

[0043] Referring to Figures 1 and 2, the disposable end-plane adjustable angle fiber endoscope provided in this embodiment includes: a handle 10, a tube 11, a first traction mechanism 12, and a second traction mechanism 13.

[0044] The handle 10 has a receiving cavity 101 inside, and a first operating port 102 and a second operating port 103 are provided on the side wall of the handle 10.

[0045] The first end of the lens tube 11 is connected to the handle 10, and the second end of the lens tube 11 is provided with a camera unit (not shown in the figure). The connecting wire of the camera unit passes through the lens tube 11 and extends into the handle 10; the second end of the lens tube is flexible.

[0046] The first traction mechanism 12 is located in the receiving cavity 101 inside the handle 10. The operating end 1211 of the first traction mechanism 12 corresponds to the first operating port 102. The first traction mechanism 12 is connected to a first traction line and a second traction line (not shown in the figure). The first traction line and the second traction line pass through the endoscope tube and are connected to the second end of the endoscope tube 11 to control the second end of the endoscope tube 11 to bend in the positive direction of the first direction (such as the left side) (such as bending to position 131 shown in Figure 1) or in the negative direction of the first direction (such as the right side) (such as bending to position 132 shown in Figure 1).

[0047] The second traction mechanism 13 is located in the receiving cavity 101 inside the handle 10. The operating end 1311 of the second traction mechanism 13 corresponds to the second operating port 103. The second traction mechanism 13 is connected to a third traction wire and a fourth traction wire (not shown in the figure). The third traction wire and the fourth traction wire pass through the endoscope tube 11 and are connected to the second end of the endoscope tube 11 to control the second end of the endoscope tube 11 to bend in the positive direction of the second direction (such as the ventral side) (such as bending to position 121 shown in Figure 1) or in the negative direction of the second direction (such as the dorsal side) (such as bending to position 122 shown in Figure 1); wherein, the second direction is perpendicular to the first direction.

[0048] This invention provides a fiber optic endoscope with adjustable angles in two planes at the end, including a handle and a tube connected to the handle. An imaging unit for imaging is installed at the end of the tube. A first traction mechanism and a second traction mechanism are disposed in a cavity inside the handle. The first traction mechanism is connected to a first traction line and a second traction line to control the degree of bending of the tube in a first direction. The second traction mechanism is connected to a third traction line and a fourth traction line to control the degree of bending of the tube in a second direction. The first and second directions are perpendicular to each other. Multi-angle observation is then performed using the imaging unit installed at the second end of the tube, thus enabling observation angle operation in two planes (the plane containing the first direction and the plane containing the second direction) at the end of the tube during use.

[0049] Optionally, the first end of the endoscope tube is detachably connected to the handle, making the endoscope tube a disposable tube. After one clinical use, it can be removed from the handle and discarded, and then replaced with a new endoscope tube. Therefore, the end-mounted dual-plane adjustable angle fiber endoscope described in this embodiment is called a disposable end-mounted dual-plane adjustable angle fiber endoscope.

[0050] Referring to Figures 1, 2, 4, 5, 7, 8, and 9, in some embodiments, the first traction mechanism 12 includes: a first rotating shaft 123, a first operating member 124, a first spur gear 125, a first rack 126, a second rack 127, and a first guide member 128.

[0051] The first rotating shaft 123 is rotatably disposed inside the handle 10; the first operating member 124 is connected to the first rotating shaft 123 and can drive the first rotating shaft 123 to rotate; the manual operation end 1211 of the first operating member 124 corresponds to the first operating port 102 and protrudes from the first operating port 102 for manual operation.

[0052] The first spur gear 125 is fixed on the first rotating shaft 123. The first rack 126 and the second rack 127 are arranged parallel to each other along the length of the handle and mesh with the first spur gear 125.

[0053] The first guide member 128 is fixed inside the handle 10. The first guide member 128 is provided with a first guide hole and a second guide hole. The first rack 126 passes through the first guide hole, and the second rack 127 passes through the second guide hole. The first guide member 128 can provide guidance for the linear movement of the first rack 126 and the second rack 127.

[0054] The first traction wire is connected to the first rack 126, and the second traction wire is connected to the second rack 127. Thus, by actuating the first operating member through the first operating port, the first operating member drives the first rotating shaft to rotate. The first rotating shaft then drives the first spur gear fixedly mounted on the first rotating shaft to rotate. The first spur gear meshes with the first and second racks, causing the first rack to move through the first guide hole and the second rack to move through the second guide hole. This, in turn, drives the first traction wire connected to the first rack and the second traction wire connected to the second rack to control the bending of the end of the endpiece tube in a first direction (e.g., horizontal direction). The direction of movement of the first rack is opposite to the direction of movement of the second rack.

[0055] Referring to Figures 1, 2, 8, and 9, in some embodiments, the second traction mechanism 13 includes: a first bevel gear 133, a second operating member 134, a second bevel gear 135, a second spur gear 136, a third spur gear 137 and a fourth spur gear 138, a third rack 139 and a fourth rack 140.

[0056] The first bevel gear 133 is rotatably connected to the handle 10. The second operating member 134 is connected to the central axis of the first bevel gear 133 and is located on the first side of the first bevel gear 133. The second operating member 134 corresponds to the second operating port 103 and protrudes from the second operating port 103 for manual operation.

[0057] The second bevel gear 135 meshes with the first bevel gear 133; the second spur gear 136 is fixedly connected to the central shaft of the second bevel gear 135 and is located on the second side of the second bevel gear 135; the third spur gear 137 and the fourth spur gear 138 mesh with the second spur gear 136 respectively.

[0058] The third rack 139 and the fourth rack 140 are arranged parallel to each other along the length of the handle 10 between the third spur gear 137 and the fourth spur gear 138. The tooth surfaces of the third rack 139 and the fourth rack 140 face away from each other. The third rack 139 meshes with the third spur gear 137, and the fourth rack 140 meshes with the fourth spur gear 138. This arrangement of the third rack 139 and the fourth rack 140 along the length of the handle 10 reduces the space occupied by the third rack 139 and the fourth rack 140, making the internal structure of the handle more compact.

[0059] The second guide member 141 is fixed inside the handle 10. The second guide member 141 is provided with a third guide hole and a fourth guide hole. The third rack 139 passes through the third guide hole, and the fourth rack 140 passes through the fourth guide hole. The second guide member 141 can provide guidance for the linear movement of the third rack 139 and the fourth rack 140.

[0060] The third traction line is connected to the third rack 139, and the fourth traction line is connected to the fourth rack 140. Thus, by actuating the second operating member through the second operating port, the second operating member is connected to the central shaft of the first bevel gear, driving the first bevel gear to move. The first bevel gear meshes with the second bevel gear, causing the moving first bevel gear to drive the second bevel gear to move. The second bevel gear, in turn, drives the second spur gear on the same central shaft to rotate. The second spur gear drives the third and fourth spur gears to rotate. The third spur gear drives the third rack to move, and the fourth spur gear drives the fourth rack to move, thereby moving the third traction line connected to the third rack and the fourth traction line connected to the fourth rack, thus controlling the bending of the end of the lens tube in a second direction (e.g., the horizontal direction). The direction of movement of the third rack is opposite to that of the fourth rack.

[0061] Referring to Figures 1 and 2, in some embodiments, the connections between the endoscope tube 11 and the handle 10, between the first traction wire and the first rack 126, between the second traction wire and the second rack 127, between the third traction wire and the third rack 139, and between the fourth traction wire and the fourth rack 140 are all detachable, allowing the endoscope tube and its traction wires to be separated from the handle. In practical use, after each endoscopic examination, the endoscope tube and its traction wires can be separated from the handle and discarded, while the handle can be retained for reuse to assemble with a new endoscope tube to form a new fiber endoscope; in other words, the endoscope tube in this embodiment is a disposable endoscope tube.

[0062] To facilitate the rapid separation of the endoscope tube and its traction wires from the handle, referring to Figures 1, 2, and 3, in some embodiments, the fiber endoscope further includes a detachable connector 14. The detachable connector 14 is detachably connected to the handle 10, and the endoscope tube 11 is fixedly connected to the detachable connector 14. A replacement compartment is provided at the end of the handle, and the detachable connector is located within the replacement compartment. The handle has a cover or door that allows opening the replacement compartment. The detachable connector located within the replacement compartment improves the stability of the connection between the detachable connector and the handle; given a fixed overall length, this arrangement also increases the working length of the endoscope tube.

[0063] In some embodiments, the detachable connector 14 may be provided with a first guide groove 142, a second guide groove 143, a third guide groove 144, and a fourth guide groove 145; a fifth rack 146 is disposed in the first guide groove 142 and can move along the first guide groove 142, the fifth rack 146 meshes with the first rack 126, and the first traction line is connected to the fifth rack 146; a sixth rack 147 is disposed in the second guide groove 143 and can move along the second guide groove 143, the sixth rack 147... The second traction line engages with the second rack 127 and is connected to the sixth rack 147; the seventh rack 148 is located in the third guide groove 144 and can move along the third guide groove 144, the seventh rack 148 engages with the third rack 139, and the third traction line is connected to the seventh rack 148; the eighth rack 149 is located in the fourth guide groove 145 and can move along the fourth guide groove 145, the eighth rack 149 engages with the fourth rack 140, and the fourth traction line is connected to the eighth rack 149. In this embodiment, the detachable connector 14 allows for convenient and rapid separation of the endoscope tube and its traction lines from the handle.

[0064] In the above embodiments, the fifth rack 146 can directly mesh with the first rack 126, and the sixth rack 147 can directly mesh with the second rack 127. Since the fifth rack 146 and the sixth rack 147 are disposable parts, while the first rack 126 and the second rack 127 are reusable parts, if the fifth rack 146 directly meshes with the first rack 126, and the sixth rack 147 directly meshes with the second rack 127, on the one hand, in actual use, and during the process of separating the fifth rack 146 from the first rack 126, and the sixth rack 147 from the second rack 127, it will inevitably cause wear or damage to the first rack 126 and the second rack 127, affecting the service life of the reusable handle; on the other hand, the fifth rack 146 and the first rack 126 have a certain meshing length, and the sixth rack 147 and the second rack 127 also have a certain meshing length, which will make the operation of separating the fifth rack 146 from the first rack 126 and the sixth rack 147 from the second rack 127 inconvenient.

[0065] Furthermore, the detachable connector 14 can utilize the elasticity between the meshing racks. For example, the first rack 126, the second rack 127, the third rack 139, the fourth rack 140, the fifth rack 146, the sixth rack 147, the seventh rack 148, and the eighth rack 149 can be made of elastic materials such as plastic. The elasticity between the fifth rack 146 and the first rack 126, the sixth rack 147 and the second rack 127, the seventh rack 148 and the third rack 139, and the eighth rack 149 and the fourth rack 140 can be utilized. The elasticity between them allows the meshing racks to achieve a flexible plug-in connection. This flexible plug-in connection offers better operability and structural stability, enabling the detachable connector 14 to be easily and quickly detached from the handle. With the help of the detachable connector 14, the lens tube and its various traction lines can be easily and quickly separated from the handle, and the reusable first rack 126, second rack 127, third rack 139, and fourth rack 140 can be connected to the disposable fifth rack 146, sixth rack 147, seventh rack 148, and eighth rack 149.

[0066] To improve the service life of the reusable handle and facilitate separation, referring to Figures 2 and 4, in some embodiments, the fiber endoscope further includes a double spur gear 15, which is rotatably disposed within the handle 10. One of the spur gears in the double spur gear 15 meshes with a first rack 126 and a second rack 127, and the other spur gear in the double spur gear 15 meshes with a fifth rack 146 and a sixth rack 147.

[0067] In this embodiment, by setting a double spur gear 15, the first rack 126 and the second rack 127 mesh with only one of the spur gears in the double spur gear 15, which reduces the meshing length of the first rack 126 and the second rack 127, which helps to reduce the wear of the first rack 126 and the second rack 127, thereby improving the service life of the handle.

[0068] In addition, the fifth rack 146 and the sixth rack 147 mesh with another spur gear in the double spur gear 15, making the meshing length of the fifth rack 146 and the sixth rack 147 relatively short, which facilitates quick separation from the double spur gear 15.

[0069] Furthermore, by providing a double spur gear 15, the relative positions of the fifth rack 146 and sixth rack 147 with the first rack 126 and second rack 127 can be adjusted by changing the length of the double spur gear 15, or by adjusting the meshing position of the fifth rack 146 and sixth rack 147 with the other spur gear in the double spur gear 15. This allows the first and second traction lines to be conveniently positioned at the longitudinal center plane of the end tube in the first direction, thereby providing precise control over the bending direction and bending angle of the end tube in the first direction. In some embodiments, a first step is provided between the two gears in the double spur gear 15. While the fifth rack 146 and sixth rack 147 mesh with the other spur gear in the double spur gear 15, the sides of the fifth rack 146 and sixth rack 147 abut against the step surface of the first step. This step surface provides guidance for the up-and-down movement of the fifth rack 146 and sixth rack 147, thereby enabling more accurate control over the bending direction and bending angle of the end tube in the first direction.

[0070] Utilizing the inherent elasticity of the fifth rack 146 and the sixth rack 147, when the fifth rack 146 and the sixth rack 147 move upward to contact the spur gear in the double spur gear 15, the fifth rack 146 and the sixth rack 147 deform (such as bending or expanding) and slide over the teeth of the double spur gear 15. When inserted into place, the fifth rack 146 and the sixth rack 147, due to their own elasticity, will restore their spur rack shape when meshing with the double spur gear 15, thereby facilitating the fifth rack 146 and the sixth rack 147 to achieve stable elastic contact and meshing with the other spur gear in the double spur gear 15, or to achieve elastic separation and disassembly.

[0071] Similarly, to improve the service life of the reusable handle and facilitate separation, referring to Figures 2 and 5, in some embodiments, the fiber endoscope further includes a fifth spur gear 151 and a sixth spur gear 152. The fifth spur gear 151 meshes with the third rack 139 and the seventh rack 148, respectively, and the sixth spur gear 152 meshes with the fourth rack 140 and the eighth rack 149, respectively. In this embodiment, the technical effects of setting the fifth spur gear 151 and the sixth spur gear 152 are similar to the technical effects of setting the double spur gear 15. Specifically, by setting the fifth spur gear 151 and the sixth spur gear 152, the relative positions of the seventh rack 148 and the eighth rack 149 with the third rack 139 and the fourth rack 140 can be adjusted by selecting appropriate lengths of the fifth spur gear 151 and the sixth spur gear 152. This allows the third traction line and the fourth traction line to be conveniently positioned at the longitudinal center plane of the end of the endoscope tube in the second direction, thereby providing precise control over the bending direction and bending angle of the end of the endoscope tube in the second direction.

[0072] In some embodiments, the fifth spur gear 151 has a second step, and the sixth spur gear 152 has a third step. When the seventh rack 148 meshes with the fifth spur gear 151, the side of the seventh rack 148 is in contact with the step surface of the second step, which provides stable guidance for the up-and-down movement of the seventh rack 148. When the eighth rack 149 meshes with the sixth spur gear 152, the side of the eighth rack 149 is in contact with the step surface of the third step, which also provides stable guidance for the up-and-down movement of the eighth rack 149. This allows for more precise control of the bending direction and angle of the end of the lens tube in the second direction.

[0073] Utilizing the elasticity of the seventh rack 148, when the seventh rack 148 moves upward to contact the fifth spur gear 151, the seventh rack 148 deforms (such as bending or expanding) and slides over the teeth of the fifth spur gear 151. When inserted into place, the seventh rack 148, due to its own elasticity, will restore the shape of a spur rack when meshing with the fifth spur gear 151, thereby facilitating the seventh rack 148 and the fifth spur gear 151 to achieve stable elastic contact and meshing, or to achieve elastic separation and disassembly. Similarly, utilizing the elasticity of the eighth rack 149 itself, when the eighth rack 149 moves upward to contact the sixth spur gear 152, the eighth rack 149 deforms (such as bending or expanding) and slides over the teeth of the sixth spur gear 152. When inserted into place, the eighth rack 149, due to its own elasticity, will restore the shape of a spur rack when meshing with the sixth spur gear 152, thereby facilitating the eighth rack 149 and the sixth spur gear 152 to achieve stable elastic contact and meshing, or to achieve elastic separation and disassembly.

[0074] Referring to Figures 3 and 6, in some embodiments, the seventh rack 148 and the eighth rack 149 are located between the fifth rack 146 and the sixth rack 147, and the plane containing the seventh rack 148 and the eighth rack 149 is perpendicular to the plane containing the fifth rack 146 and the sixth rack 147. In this embodiment, the seventh rack 148 and the eighth rack 149 are located between the fifth rack 146 and the sixth rack 147, which can further increase the compactness of the internal structure of the handle.

[0075] Referring to Figures 1, 2, and 5, in some embodiments, the seventh rack 148 and the eighth rack 149 are disposed between the fifth spur gear 151 and the sixth spur gear 152, with the tooth surfaces of the seventh rack 148 and the eighth rack 149 facing away from each other. This can further increase the compactness of the internal structure of the handle.

[0076] Referring to Figure 2, in some embodiments, the handle 10 has a replacement compartment 16 at its tail end, and a detachable connector 14 is disposed in the replacement compartment 16. The handle 10 has a cover or door that can open the replacement compartment. Thus, during use, when the lens tube needs to be replaced, it is only necessary to open the replacement compartment at the tail end of the handle and remove the detachable connector from the handle as a whole. When a new lens tube needs to be replaced, it is only necessary to place the detachable connector 14 with the new lens tube into the replacement compartment at the tail end of the handle, and make the new fifth rack 146 and the new sixth rack 147 on the detachable connector 14 mesh with the other spur gear in the double spur gear 15, and make the new seventh rack 148 and the new eighth rack 149 on the detachable connector 14 mesh with the fifth spur gear 151 and the sixth spur gear 152, respectively.

[0077] Referring to Figures 2 and 3, in some embodiments, the detachable connector 14 is tapered in shape, and the inner wall of the replacement compartment 16 is adapted to the shape of the detachable connector 14; in this way, it is easier to disassemble and replace during replacement, and at the same time, the inner wall of the replacement compartment can provide a limiting function for the detachable connector.

[0078] In other embodiments, the inner wall of the replacement compartment is provided with internal threads, and the outer wall of the detachable connector 14 is provided with external threads. The external threads on the outer wall of the detachable connector 14 can be threadedly connected to or disconnected from the internal threads on the inner wall of the replacement compartment.

[0079] In other embodiments, the endoscope tube includes an inner flexible tube, a snake-bone structure, and a rubber layer; the snake-bone structure is wrapped around the outer surface of the inner flexible tube, and a rubber layer is wrapped around the outside of the snake-bone structure, and the spacing density between the segments of the snake-bone structure at the second end of the endoscope tube is less than the spacing density between the segments of the snake-bone structure at the first end of the endoscope tube.

[0080] Referring to Figure 10, when assembling the fiber endoscope, you can choose to assemble the shaft and gear assembly first and then put them into the handle, thereby reducing the difficulty of assembling the fiber endoscope.

[0081] The following example, examining a patient lying supine, illustrates the relevant operations of the fiber endoscope in this embodiment of the invention.

[0082] For patients lying supine, a fiber optic endoscope is used for examination. When the fiber optic endoscope reaches the target area, the first operating element 124 drives the first rotating shaft 123 to rotate in the forward direction. The first rotating shaft 123 drives the first spur gear 125 to rotate. The first spur gear 125 meshes with the first rack 126, which drives the first rack 126 and the first traction line to move. The first traction line pulls the second end of the endoscope tube to bend towards the patient's left side (such as bending to position 131 as shown in Figure 1).

[0083] The first operating element 124 drives the first rotating shaft 123 to rotate in the opposite direction. The first rotating shaft 123 drives the first spur gear 125 to rotate. The first spur gear 125 meshes with the second rack 127, driving the second rack 127 and the second traction line to move. The second traction line pulls the second end of the endoscope tube to bend toward the patient's right side (such as bending to position 132 as shown in Figure 1).

[0084] The second operating element 134 drives the first bevel gear 133 to rotate in the forward direction. Then, the first bevel gear 133 drives the second bevel gear 135 to move. The second bevel gear 133 then drives the second spur gear 136 to transmit power. The second spur gear 136 then drives the third spur gear 137 to rotate. The third spur gear 137 drives the third rack 139. Then, the third rack 139 pulls the third traction line. The third traction line pulls the second end of the endoscope tube to bend towards the patient's back (as shown in position 122 in Figure 1).

[0085] The second operating element 134 drives the first bevel gear 133 to rotate in the opposite direction. Then, the first bevel gear 133 drives the second bevel gear 135 to move. The second bevel gear 135 then drives the second spur gear 136 to transmit power. The second spur gear 136 then drives the fourth spur gear 138 to rotate. The fourth spur gear 138 drives the fourth rack 140. Then, the fourth rack 140 pulls the fourth traction line. The fourth traction line pulls the second end of the endoscope tube to bend toward the patient's abdomen (as shown in position 121 in Figure 1).

[0086] In some embodiments, complex structural regions can be observed through the coordinated operation of the first and second operating elements.

[0087] For example, when the fiber optic endoscope reaches the target area and it is necessary to focus on observing the left side, the first operating element 124 can be used to drive the first rotating shaft 123 to rotate forward. The first rotating shaft 123 drives the first spur gear 125 to rotate. The first spur gear 125 meshes with the first rack 126, causing the first rack 126 and the first traction line to move. The first traction line pulls the second end of the endoscope tube 11 towards the patient's left side, bending it. In this state, the second operating element 134 can then be operated to drive the first bevel gear 133 to rotate forward. The first bevel gear 133 drives the second bevel gear 135 to move. The second bevel gear 135 then drives the second spur gear 136 for transmission. The second spur gear 136 then drives the third spur gear 137 to rotate. The third spur gear 137 drives the third rack 139. Then, the third rack 139 pulls the third traction line, causing the third traction line to pull the second end of the endoscope tube 11 towards the patient's dorsal side. This allows the second end of the endoscope tube to bend towards the left dorsal side, enabling observation of the patient's left dorsal side.

[0088] For example, the first operating element 124 can first drive the first rotating shaft 123 to rotate forward. The first rotating shaft 123 drives the first spur gear 125 to rotate forward. The first spur gear 125 meshes with the first rack 126, causing the first rack 126 and the first traction line 125 to move. The first traction line 125 pulls the second end of the endoscope tube to bend towards the patient's left side. In this state, the second operating element 134 can then be operated to drive the first bevel gear 133 to rotate in the opposite direction. Then, the first bevel gear 133 drives the second bevel gear 135 to move. The second bevel gear 135 then drives the second spur gear 136 for transmission. The second spur gear 136 then drives the fourth spur gear 138 to rotate. The fourth spur gear 138 drives the fourth rack 140. Then, the fourth rack 140 pulls the fourth traction line, which pulls the second end of the endoscope tube to bend towards the patient's ventral side. This allows the second end of the endoscope tube to bend towards the left ventral side, enabling observation of the patient's left ventral side.

[0089] For example, when the fiberoptic endoscope reaches the target area and it is necessary to focus on observing the right side, the first operating element 124 drives the first rotating shaft 123 to rotate in the opposite direction. The first rotating shaft 123 drives the first spur gear 125 to rotate. The first spur gear 125 meshes with the second rack 127, causing the second rack 127 and the second traction line to move. The second traction line pulls the second end of the endoscope tube towards the patient's right side, bending it. In this state, the second operating element 134 can then be operated to drive the first bevel gear 133 to rotate in the forward direction. Then, the first bevel gear 133 drives the second bevel gear 135 to move. The second bevel gear 135 then drives the second spur gear 136 for transmission. The second spur gear 136 then drives the third spur gear 137 to rotate. The third spur gear 137 drives the third rack 139. Then, the third rack 139 pulls the third traction line, causing the third traction line to pull the second end of the endoscope tube towards the patient's dorsal side. This allows the second end of the endoscope tube to bend towards the right dorsal side, enabling observation of the patient's right dorsal side.

[0090] For example, the first operating element 124 drives the first rotating shaft 123 to rotate in the opposite direction. The first rotating shaft 123 drives the first spur gear 125 to rotate. The first spur gear 125 meshes with the second rack 127, causing the second rack 127 and the second traction line to move. The second traction line pulls the second end of the endoscope tube towards the patient's right side, bending it. In this state, the second operating element 134 can then be operated to drive the first bevel gear 133 to rotate in the opposite direction. Then, the first bevel gear 133 drives the second bevel gear 135 to move. The second bevel gear 135 then drives the second spur gear 136 for transmission. The second spur gear 136 then drives the fourth spur gear 138 to rotate. The fourth spur gear 138 drives the fourth rack 140. Then, the fourth rack 140 pulls the fourth traction line, causing the fourth traction line to pull the second end of the endoscope tube towards the patient's ventral side. This allows the second end of the endoscope tube to bend towards the right ventral side, enabling observation of the patient's right ventral side.

[0091] Optionally, the plane containing the first and second traction lines in the first traction mechanism 12 is perpendicular to the plane containing the third and fourth traction lines in the second traction mechanism 13.

[0092] Optionally, the plane containing the first and second traction lines in the first traction mechanism 12 is parallel to or coincides with the plane containing the second end of the endoscope tube that is bent in the first direction in a positive or negative direction; the plane containing the third and fourth traction lines in the second traction mechanism 13 is parallel to or coincides with the plane containing the second end of the endoscope tube that is bent in the second direction in a positive or negative direction.

[0093] Optionally, the first traction mechanism 12 is provided with a first operating member 124, the manual operating end 1211 of the first operating member 124 corresponds to the first operating port 102 and protrudes from the first operating port 102; the operating direction of the manual operating end 1211 of the first operating member 124 is parallel to or coincides with the plane where the second end of the endoscope tube is bent in the first direction in a positive or negative direction; the second traction mechanism 13 is provided with a second operating member 134, the second operating member 134 corresponds to the second operating port 103 and protrudes from the second operating port 103; the plane where the first operating port 102 is located intersects with the plane where the second operating port 103 is located; the operating direction of the second operating member 134 is parallel to or coincides with the plane where the second end of the endoscope tube is bent in the second direction in a positive or negative direction.

[0094] Optionally, the first operating member 124 is moved through the first operating port 102 to drive the first traction line and the second traction line, so as to control the second end of the endoscope tube to bend in the positive or negative direction of the first direction; the second operating member 134 is moved through the second operating port 103 to drive the third traction line and the fourth traction line, so as to control the second end of the endoscope tube to bend in the positive or negative direction of the second direction; the plane where the first operating port 102 is located intersects the plane where the second operating port 103 is located.

[0095] Optionally, the plane containing the first spur gear 125 intersects with the plane containing the second bevel gear 135; the plane containing the third rack 139 and the fourth rack 140 intersects with the plane containing the first rack 126 and the second rack 127.

[0096] Optionally, the first end of the end tube is detachably connected to the handle via a detachable connector 14; the fifth rack 146 engages with and is detachably connected to the first rack 126, the sixth rack 147 engages with and is detachably connected to the second rack 127, the seventh rack 148 engages with and is detachably connected to the third rack 139, and the eighth rack 149 engages with and is detachably connected to the fourth rack 140, so as to realize the detachable connection between the detachable connector 14 and the handle.

[0097] In this embodiment, based on the setting method of the manual operation end 1211 of the first operation member 124 and the first operation port 102, and the setting method of the second operation member 134 and the second operation port 103, the operation direction of the user at the first operation port 102 intersects with the operation direction at the second operation port 103. The user's operation direction is consistent with the bending direction of the second end of the endoscope tube. Moreover, the plane where the traction wire inside the fiber endoscope device is located is consistent with the plane where the bending direction of the second end of the endoscope tube is located, thereby facilitating the user to perform operation in the same direction and ensuring adjustment accuracy.

[0098] To facilitate gripping and manipulation, endoscope handles are typically not very large, resulting in limited internal space for the traction mechanism. Current technology for adjusting the endoscope tube usually employs a parallel layout for the transmission structure within the handle cavity. This is because a cross-layout requires avoiding interference between the two transmission structures (controlling the bending of the end in different planes), necessitating a larger internal space. If the planes containing each set of two metal wires used to adjust the deflection angle in the two planes are parallel, this parallel layout necessitates twisting and offsetting the two sets of two metal wires used to drive the end deflection before they can cross in a cross shape at the end, thus controlling the bending of the end in the intersecting (or even perpendicular) planes.

[0099] Ideally, when a doctor manually moves the manipulator, the direction of the doctor's manipulation should align with the bending motion of the endoscope tip. This allows the doctor to visually understand the tip's deflection angle within the body through their hand movements. "Agreeing in direction" means, for example, to bend the tip forward, the vertically positioned manipulator should be rotated forward; to bend it to the left, the horizontally positioned manipulator should be rotated to the left. If the suture twists or shifts, it becomes difficult to establish a precise correspondence between the doctor's hand movements, the suture's displacement, and the bending angle. During operation, the sutures are prone to twisting and interfering with each other, making precise control of the deflection angle impossible.

[0100] To address the aforementioned issues, this embodiment employs a combination of bevel gears, spur gears, and racks. The plane shared by the third rack 139 and the fourth rack 140 intersects the plane shared by the first rack 126 and the second rack 127. The plane containing the first and second traction lines in the first traction mechanism 12 is parallel to or coincides with the plane where the second end of the endpiece tube bends positively or negatively in the first direction. Similarly, the plane containing the third and fourth traction lines in the second traction mechanism 13 is parallel to or coincides with the plane where the second end of the endpiece tube bends positively or negatively in the second direction. This allows the embodiment to achieve a connection between the plane containing the first and second traction lines in the first traction mechanism 12 and the plane containing the third and fourth traction lines in the second traction mechanism 13. The planes where the lead wires are located are perpendicular to each other, thus enabling a reasonable and compact arrangement of two sets of traction mechanisms within the limited internal cavity of the handle. This design layout ensures that the plane of the traction rope is consistent with and in the same direction as the plane of the corresponding bending direction, which is beneficial to improving the convenience and accuracy of adjusting the end of the fiber endoscope. Moreover, the traction wire is less likely to tangle during assembly and disassembly, making the plane of the traction wire consistent with the plane of the second end of the endoscope tube corresponding to the bending direction. This facilitates unidirectional operation by the user, allowing for observation angle operation on two planes (the plane of the first direction and the plane of the second direction) at the end of the endoscope tube during use. This is beneficial for precise control of the bending direction and bending angle in the first and second directions, and facilitates assembly and disassembly.

[0101] Furthermore, in this embodiment, the planes containing different operating ports and different operating components intersect and correspond to different bending planes. For example, the first operating port 102 is vertically oriented, corresponding to the vertical adjustment of the end. This greatly increases the convenience of operation and significantly reduces the possibility of misadjustment on unintended bending planes. Moreover, the plane containing the first operating port 102 intersects with the plane containing the second operating port 103, achieving a cross-shaped connection between the two sets of lines and the end without the need for line twisting or offset. This not only avoids the twisting of the traction line during use, preventing damage and malfunctions, but also allows doctors to easily correlate hand movements (such as selecting a vertical operating component for forward / backward movement or selecting a horizontal operating component for left / right rotation, or adjusting the amount of movement of the operating component) with the bending direction and degree of the endoscope tube. Furthermore, it enables precise control of the bending direction and angle through hand movements, achieving fine adjustment and improving adjustment accuracy.

[0102] This invention provides a disposable end-mounted dual-plane adjustable angle fiber endoscope, including a handle and a tube connected to the handle. The end of the tube is equipped with a camera unit for imaging. A first traction mechanism and a second traction mechanism are arranged in a receiving cavity inside the handle. The first traction mechanism is connected to a first traction line and a second traction line to control the degree of bending of the tube in a first direction. The second traction mechanism is connected to a third traction line and a fourth traction line to control the degree of bending of the tube in a second direction. The first direction and the second direction are perpendicular to each other, thereby enabling dual-plane (the plane containing the first direction and the plane containing the second direction) observation angle operation during use, overcoming the blind spot disadvantage of traditional fiber endoscopes.

[0103] In addition, the present invention also has the following beneficial effects:

[0104] By employing specific combinations and arrangements of spur gears, racks, and bevel gears in the first and second traction mechanisms, and by employing specific combinations and arrangements of racks and gears in the detachable connector, the two sets of traction lines and the planes containing the racks of different traction mechanisms are arranged in a cross pattern. The racks in the detachable connector are arranged in a cross-vertical pattern. Combined with the cross-pattern of the operating port, the connection points between the two sets of traction lines and the second end of the endoscope tube can be made cross-shaped without twisting or offsetting the lines. This not only avoids twisting of the traction lines during use, preventing damage and malfunctions, but also allows doctors to easily correlate hand movements (such as selecting the vertical operating piece for forward / backward movement or selecting the horizontal operating piece for left / right rotation, or adjusting the amount of movement of the operating piece) with the bending direction and degree of the endoscope tube. Furthermore, it enables precise control of the bending direction and angle through hand movements, achieving fine adjustment and improving adjustment accuracy.

[0105] By utilizing the specific combination and special arrangement of the rack and gear in the detachable connector, combined with the elastic contact between the rack and the corresponding gear, the detachable connector can achieve elastic contact or separation during the insertion and removal of the handle. The entire insertion and removal process is convenient, quick, and the insertion is stable.

[0106] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0107] The embodiments of the present invention have been described in detail above. Those skilled in the art can design and modify the device and its usage within the scope of the present invention according to the on-site construction conditions.

[0108] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0109] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fiber optic endoscope with adjustable angle via dual-plane design at the end, characterized in that, include: The handle has an internal cavity and a first operating port and a second operating port are provided on the side wall of the handle. The scope tube has a first end connected to the handle, and a second end provided with a camera unit. The connecting wire of the camera unit passes through the scope tube and extends into the handle; the second end of the scope tube is flexible. A first traction mechanism is located in a receiving cavity inside the handle. The operating end of the first traction mechanism corresponds to the first operating port. The first traction mechanism is connected to a first traction line and a second traction line. The first traction line and the second traction line pass through the endoscope tube and are connected to the second end of the endoscope tube to control the second end of the endoscope tube to bend in the positive direction of the first direction or in the negative direction of the first direction. The second traction mechanism is located in the receiving cavity inside the handle. The operating end of the second traction mechanism corresponds to the second operating port. The second traction mechanism is connected to a third traction line and a fourth traction line. The third traction line and the fourth traction line pass through the endoscope tube and are connected to the second end of the endoscope tube to control the second end of the endoscope tube to bend in the positive direction or in the negative direction of the second direction; wherein, the second direction is perpendicular to the first direction.

2. The fiber optic endoscope as described in claim 1, characterized in that, The first traction mechanism includes: A first rotating shaft is rotatably disposed within the handle; The first operating component is connected to the first rotating shaft and can drive the first rotating shaft to rotate. The manual operating end of the first operating component corresponds to the first operating port and protrudes from the first operating port. The first spur gear is fixed on the first rotating shaft; A first rack and a second rack are arranged parallel to each other along the length of the handle and mesh with the first spur gear; A first guide member is fixed inside the handle. The first guide member has a first guide hole and a second guide hole. The first rack passes through the first guide hole, and the second rack passes through the second guide hole. The first traction line is connected to the first rack, and the second traction line is connected to the second rack.

3. The fiber optic endoscope as described in claim 2, characterized in that, The second traction mechanism includes: A first bevel gear is rotatably connected to the handle; The second operating member is connected to the central shaft of the first bevel gear and is located on the first side of the first bevel gear. The second operating member corresponds to the second operating port and protrudes from the second operating port. The second bevel gear meshes with the first bevel gear; The second spur gear is fixedly connected to the central shaft of the second bevel gear and is located on the second side of the second bevel gear; The third spur gear and the fourth spur gear mesh with the second spur gear respectively; The third rack and the fourth rack are arranged parallel to each other along the length of the handle between the third spur gear and the fourth spur gear. The tooth surfaces of the third rack and the fourth rack face away from each other. The third rack meshes with the third spur gear, and the fourth rack meshes with the fourth spur gear. The second guide member is fixed inside the handle. The second guide member is provided with a third guide hole and a fourth guide hole. The third rack passes through the third guide hole and the fourth rack passes through the fourth guide hole. The third traction line is connected to the third rack, and the fourth traction line is connected to the fourth rack.

4. The fiber optic endoscope as described in claim 3, characterized in that, The connections between the endoscope tube and the handle, between the first traction line and the first rack, between the second traction line and the second rack, between the third traction line and the third rack, and between the fourth traction line and the fourth rack are all detachable.

5. The fiber optic endoscope as described in claim 4, characterized in that, The fiber endoscope also includes: A detachable connector is detachably connected to the handle, and the lens tube is fixedly connected to the detachable connector; The handle has a replacement compartment at its tail end, and the detachable connector is located in the replacement compartment; the handle has a cover or door that can open the replacement compartment.

6. The fiber optic endoscope as described in claim 4, characterized in that, The detachable connector is provided with a first guide groove, a second guide groove, a third guide groove and a fourth guide groove; The fifth rack is disposed in the first guide groove and can move along the first guide groove. The fifth rack meshes with the first rack, and the first traction line is connected to the fifth rack. The sixth rack is disposed in the second guide groove and can move along the second guide groove. The sixth rack meshes with the second rack, and the second traction line is connected to the sixth rack. The seventh rack is disposed in the third guide groove and can move along the third guide groove. The seventh rack meshes with the third rack, and the third traction line is connected to the seventh rack. The eighth rack is disposed in the fourth guide groove and can move along the fourth guide groove. The eighth rack meshes with the fourth rack, and the fourth traction line is connected to the eighth rack.

7. The fiber optic endoscope as described in claim 6, characterized in that, The fiber endoscope also includes: A double spur gear, rotatably disposed within the handle, wherein one of the spur gears meshes with the first rack and the second rack, and the other spur gear meshes with the fifth rack and the sixth rack; The fifth spur gear and the sixth spur gear are respectively meshed with the third rack and the seventh rack, and the sixth spur gear is respectively meshed with the fourth rack and the eighth rack.

8. The fiber optic endoscope as described in claim 7, characterized in that, The seventh and eighth racks are located between the fifth and sixth racks, and the plane in which the seventh and eighth racks are located is perpendicular to the plane in which the fifth and sixth racks are located.

9. The fiber optic endoscope as described in claim 8, characterized in that, The seventh rack and the eighth rack are disposed between the fifth spur gear and the sixth spur gear, and the tooth surfaces of the seventh rack and the eighth rack face away from each other.

10. The fiber endoscope as described in claim 5, characterized in that, The detachable connector is tapered in shape, and the inner wall of the replacement compartment is adapted to the shape of the detachable connector.

11. The fiber endoscope as described in claim 1, characterized in that, The fiber endoscope also includes: A detachable connector is detachably connected to the handle, and the lens tube is fixedly connected to the detachable connector; The handle has a replacement compartment at its tail end, and the detachable connector is located in the replacement compartment; the handle has a cover or door that can open the replacement compartment.

12. The fiber optic endoscope as described in claim 1, characterized in that, The first traction wire and the second traction wire are arranged at the longitudinal center plane of the endoscope tube in the first direction; the third traction wire and the fourth traction wire are arranged at the longitudinal center plane of the endoscope tube in the second direction.

13. The fiber optic endoscope as described in claim 1, characterized in that, The plane containing the first and second traction lines in the first traction mechanism is perpendicular to the plane containing the third and fourth traction lines in the second traction mechanism; and / or The plane containing the first and second traction lines in the first traction mechanism is parallel to or coincides with the plane containing the second end of the endoscope tube that bends positively or negatively along the first direction; the plane containing the third and fourth traction lines in the second traction mechanism is parallel to or coincides with the plane containing the second end of the endoscope tube that bends positively or negatively along the second direction.

14. The fiber optic endoscope as described in claim 1, characterized in that, The first traction mechanism is provided with a first operating member, the manual operating end of which corresponds to and protrudes from the first operating port; the operating direction of the manual operating end of the first operating member is parallel to or coincides with the plane in which the second end of the endoscope tube is bent positively or negatively along the first direction; the second traction mechanism is provided with a second operating member, the second operating member corresponding to and protruding from the second operating port; the plane in which the first operating port is located intersects the plane in which the second operating port is located; the operating direction of the second operating member is parallel to or coincides with the plane in which the second end of the endoscope tube is bent positively or negatively along the second direction; and / or The first operating port is used to move the first operating element, which drives the first traction line and the second traction line to control the second end of the endoscope tube to bend in the positive or negative direction along the first direction; the second operating port is used to move the second operating element, which drives the third traction line and the fourth traction line to control the second end of the endoscope tube to bend in the positive or negative direction along the second direction; the plane where the first operating port is located intersects the plane where the second operating port is located.

15. The fiber optic endoscope as described in claim 3, characterized in that, The plane containing the first spur gear intersects with the plane containing the second bevel gear; the plane containing the third rack and the fourth rack intersects with the plane containing the first rack and the second rack.

Images