An endoscope

Abstract

The utility model relates to the technical field of medical detection instruments, and discloses an endoscope, including a handle, an insertion tube, a snake bone, a camera module and a driving mechanism. A control button is arranged on the outer surface of the handle, and a control circuit is arranged inside, and the control button is electrically connected to the control circuit. One end of the insertion tube is connected to the handle and can be bent and deformed. Traction wires are passed through both sides of the snake bone, which can bend and swing in a horizontal plane under the pull of the traction wire, and one end is connected to the end of the insertion tube facing away from the handle. The camera module is connected to the end of the snake bone facing away from the insertion tube, can swing together with the end of the snake bone, and is electrically connected to the control circuit. The driving mechanism is arranged on the side of the insertion tube close to the snake bone, is electrically connected to the control circuit, and is used to pull the traction wire. The endoscope shortens the length of the traction wire, thereby avoiding the need to arrange a threaded tube outside the traction wire, reducing the difficulty of installing the endoscope, and can also improve the angle control accuracy of the endoscope.

Description

Technical Field

[0001] The utility model relates to the technical field of medical detection instruments, in particular to an endoscope. Background Art

[0002] An endoscope is a medical testing instrument commonly used in the diagnosis and treatment of the ear, nose, throat, airway, urinary tract, abdominal cavity, and stomach. It inserts an insertion tube into a natural orifice such as the human body's mouth or anus, and adjusts the angle of the snake bone by pulling the steel wire in the flexible snake bone. By rotating the insertion tube, images of the stomach and intestines at various angles can be collected. In existing endoscopes, the driving mechanism for pulling the steel wire is set in the operating handle of the endoscope, resulting in the length of the steel wire being too long. A threaded tube is required to be placed on the steel wire jacket to prevent the insertion tube from deforming during the transmission process, making installation difficult, and the steel wire is prone to breakage if not installed properly. After long-term use, the longer steel wire will be stretched and deformed, causing the adjustable angle of the snake bone to decay and the adjustment accuracy to decrease. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an endoscope which can shorten the length of the traction wire, avoid the need for a threaded tube outside the traction wire, reduce the difficulty of installation, and avoid angle attenuation after long-term use.

[0004] To solve the above problems, the technical solution adopted by the utility model is as follows: an endoscope, comprising: a handle, a control button is arranged on the outer surface, a control circuit is arranged inside, and the control button is electrically connected to the control circuit; an insertion tube, one end of which is connected to the handle and can be bent and deformed; a snake bone, both sides of which are provided with traction wires, which can bend and swing in a horizontal plane under the traction of the traction wires, and one end is connected to the end of the insertion tube facing away from the handle; a camera module is connected to the end of the snake bone facing away from the insertion tube, can swing together with the end of the snake bone, and is electrically connected to the control circuit; a driving mechanism is arranged on the side of the insertion tube close to the snake bone, is electrically connected to the control circuit, and is used to pull the traction wire.

[0005] Compared with the prior art, the utility model has the beneficial effect of shortening the length of the traction wire by arranging the driving mechanism at the end of the insertion tube close to the snake bone, thereby avoiding the need to arrange a threaded tube outside the traction wire, reducing the difficulty of installation and avoiding the breakage of the steel wire due to improper installation. At the same time, it can also avoid the steel wire being stretched and deformed after long-term use due to being too long, resulting in the attenuation of the adjustable angle and the reduction of the angle adjustment accuracy. The driving mechanism is connected to the control circuit in the handle through the wire, and the retraction and extension of the traction wire are controlled by the control button outside the handle to adjust the bending angle of the snake bone.

[0006] The above-mentioned endoscope, the driving mechanism includes a motor, a transmission gear set and a traction wheel, the traction wheel is rotatably arranged in the insertion tube, the traction wire is wound on the traction wheel, and the motor drives the traction wheel to rotate through the transmission gear set to realize the retraction and release of the traction wires on both sides of the snake bone.

[0007] In the above-mentioned endoscope, the transmission gear set includes an active bevel gear and a driven bevel gear, the active bevel gear is connected to the output shaft of the motor, the driven bevel gear is connected to the traction wheel shaft, and the driven bevel gear is meshed with the active bevel gear.

[0008] In the above-mentioned endoscope, two side-by-side traction grooves are arranged on the peripheral surface of the traction wheel, and the two traction wires on both sides of the snake bone are respectively wound in the two traction grooves in opposite winding directions.

[0009] In the above-mentioned endoscope, the motor is a hollow cup motor.

[0010] In the above-mentioned endoscope, the snake bone includes a head, a tail and multiple joints, and the multiple joints are connected in series. The head, the tail and both sides of each joint are provided with guide parts for the traction wire to pass through. One end of the joint string formed by the multiple joints connected in series is connected to the insertion tube through the head, and the other end of the joint string is connected to the camera module through the tail. The end of the traction wire is inserted into the tail, and the two ends of the traction wire are both provided with a ferrule.

[0011] In the above-mentioned endoscope, each joint is provided with a circular rotating convex plate and a circular rotating groove matching the rotating convex plate on the side walls on both sides in a direction perpendicular to the swinging plane of the snake bone. The rotating convex plate and the rotating groove are respectively facing the front and rear ends of the joint. The rotating convex plate of each joint can be embedded in the rotating groove of the adjacent joint to realize the rotational connection between the joints.

[0012] In the above-mentioned endoscope, the end of the rotating protrusion is provided with a fan-shaped limiting groove which is concentric with the rotating protrusion, and a fan-shaped limiting protrusion matching the limiting groove is provided in the rotating groove, the curvature of the limiting protrusion is smaller than the curvature of the limiting groove, and the limiting protrusion of each joint can be embedded in the limiting groove of the adjacent joint.

[0013] In the above-mentioned endoscope, fan-shaped guide grooves cocentric with the rotating convex plate are respectively arranged on both sides of the rotating convex plate, and the rotating groove is surrounded by two fan-shaped guide convex plates matching the guide grooves. The curvature of the guide convex plates is smaller than the curvature of the guide grooves. After each segment of the bone joint is connected with the adjacent segment of the bone joint, the two guide convex plates can be respectively embedded in the guide grooves.

[0014] In the above-mentioned endoscope, a waterproof plug is arranged between the driving mechanism and the snake bone, and the waterproof plug is provided with a through hole for the traction wire to pass through.

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an endoscope according to an embodiment of the utility model;

[0017] Figure 2 A cross-sectional view of the end structure of the insertion tube according to an embodiment of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the driving mechanism of an embodiment of the utility model;

[0019] Figure 4 A top view of a traction wheel according to an embodiment of the utility model;

[0020] Figure 5 A front view of a condyle according to an embodiment of the utility model;

[0021] Figure 6 It is a top view of a condyle according to an embodiment of the utility model.

[0022] Description of Figure Numbers:

[0023] 100 handle, 110 control button, 120 control circuit, 200 insertion tube, 210 tube seat, 300 snake bone, 310 traction wire, 311 ferrule, 320 head, 330 joint, 331 rotating convex plate, 332 rotating groove, 333 limiting groove, 334 limiting convex plate, 335 guide groove, 336 guide convex plate, 337 guide part, 340 end, 400 camera module, 500 driving mechanism, 510 motor, 520 transmission gear set, 521 active bevel gear, 522 driven bevel gear, 530 traction wheel, 531 traction groove, 540 driving bracket, 541 waterproof plug. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below. Figure 1 and Figure 2The embodiment of the utility model provides an endoscope, including a handle 100, an insertion tube 200, a snake bone 300, a camera module 400 and a driving mechanism 500. The handle 100 is used to transmit the collected image to the display device, and can be connected to the display device by wire or wirelessly, and adjust the bending angle of the snake bone 300. A control button 110 is arranged on the outer surface, and a control circuit 120 is arranged inside. The control button 110 is electrically connected to the control circuit 120, and a control signal for adjusting the bending angle of the snake bone 300 can be transmitted to the control circuit 120 by pressing the control button 110. One end of the insertion tube 200 is connected to the handle 100, and the insertion tube 200 can be bent and deformed under the action of external force. The other end of the insertion tube 200 is connected to the snake bone 300. Traction wires 310 are inserted on both sides of the snake bone 300, and the snake bone 300 can be bent and swung in a horizontal plane under the pull of the traction wires 310. The camera module 400 is disposed at the end of the snake bone 300 facing away from the insertion tube 200, and is connected to the control circuit 120 in the handle 100, and can swing along with the end of the snake bone 300. The driving mechanism 500 is disposed on the side of the insertion tube 200 close to the snake bone 300, and is electrically connected to the control circuit 120, and can pull the traction wire 310 under the control of the control circuit 120, thereby adjusting the bending angle of the snake bone 300. The traction wire 310 is generally made of a corrosion-resistant and tough material, such as steel wire.

[0025] In the endoscope of the embodiment of the utility model, since the driving mechanism 500 is arranged at the end of the insertion tube 200 near the snake bone 300, the length of the traction wire 310 is much shorter than that of the endoscope in which the driving mechanism 500 is arranged in the handle 100. Since the length of the traction wire 310 is shortened and does not pass through most areas of the insertion tube 200, it will not bend with the insertion tube 200, and will not be affected by the bending of the insertion tube 200 during the traction process, so there is no need to install a threaded tube outside the traction wire 310, which reduces the difficulty of installing the traction wire 310 and avoids the traction wire 310 being worn off due to improper installation of the threaded tube. Avoiding the installation of the threaded tube also reduces the amount of space used in the insertion tube 200 and reduces the outer diameter of the insertion tube 200, so that it is convenient for the endoscope to go deep into a deeper and narrower space to observe the part that needs to be observed. At the same time, since the length of the traction wire 310 is shortened, the transmission of the traction wire 310 is more accurate, which can reduce the failure rate, and can also avoid the traction wire 310 being stretched and deformed after long-term use, resulting in angle attenuation, resulting in the inability to adjust the shooting angle of the endoscope with high precision.

[0026] Reference Figure 3The driving mechanism 500 includes a motor 510, a transmission mechanism and a traction wheel 530. Since the space inside the insertion tube 200 is relatively narrow, the transmission mechanism preferably adopts a transmission gear set 520. In this embodiment, the driving mechanism 500 is fixedly arranged in the insertion tube 200 through a driving bracket 540, the motor 510 is fixedly arranged on the driving bracket 540, and the traction wheel 530 is rotatably arranged on the driving bracket 540. The transmission gear set 520 includes an active bevel gear 521 and a driven bevel gear 522. The active bevel gear 521 is connected to the output shaft of the motor 510, and the driven bevel gear 522 is connected to the traction wheel 530 shaft. The active bevel gear 521 meshes with the driven bevel gear 522. The traction wires 310 on both sides of the snake bone 300 are wound around the traction wheel 530. The torque output by the motor 510 can be transmitted to the traction wheel 530 through the active bevel gear 521 and the driven bevel gear 522 in sequence. By controlling the motor 510 to drive the traction wheel 530 to rotate clockwise or counterclockwise, the traction wire 310 on one side of the snake bone 300 can be recovered and the traction wire 310 on the other side can be released. The snake bone 300 is controlled to bend toward the recovered side. By adjusting the length of the recovered and released traction wires 310, the bending angle of the snake bone 300 can be adjusted. In order to further improve the waterproof performance of the snake bone 300 and further prevent body fluids from flowing from the snake bone 300 into the inside of the insertion tube 200 to damage and corrode the motor 510, a waterproof plug 541 is provided at one end of the drive bracket 540 close to the snake bone 300. The waterproof plug 541 is provided with a through hole that is just enough for the traction wire 310 to pass through, so as to prevent body fluids from entering the inside of the insertion tube 200. The motor 510 is preferably a coreless motor, wherein the minimum diameter of a brushless coreless motor may be about 3 mm, which is more suitable for the relatively limited space in the insertion tube 200 .

[0027] It is understandable that the traction wire 310 on both sides of the snake bone 300 can be one, the middle part of the traction wire 310 is wound around the traction wheel 530, and the two ends are respectively fixedly connected to the ends of the snake bone 300; or two, one end is wound around the traction wheel 530, and the other end is fixedly connected to the ends of the snake bone 300. Figure 4 When two traction wires 310 are used, in order to prevent the two traction wires 310 from being entangled with each other and affecting the normal release of the traction wires 310, two parallel traction grooves 531 are provided on the circumference of the traction wheel 530. The two traction wires 310 of the snake bone 300 are respectively wound in the two traction grooves 531 in opposite winding directions, that is, one traction wire 310 is wound in the traction groove 531 on one side in a clockwise direction, and the other traction wire 310 is wound in the traction groove 531 on the other side in a counterclockwise direction, so as to prevent the two traction wires 310 from being entangled with each other. Figure 1 One end of the insertion tube 200 is disposed at one end of the handle 100 through a tube seat 210 .

[0028] It is understandable that the snake bone 300 can be integrally formed of a flexible material, or can be formed by connecting and splicing multiple bone segments 330 in sequence. Figure 2 and Figure 6 In this embodiment, the snake bone 300 includes a head 320, a plurality of joints 330 and a tail 340. The plurality of joints 330 are connected in sequence by rotation to form a series of joint strings. The head 320, the tail 340 and each joint 330 are provided with guide parts 337 for the traction wire 310 to pass through on both sides of the swing direction of the snake bone 300, which are used to guide the retraction and release of the traction wire 310. In this embodiment, referring to Figure 6 The guide portion 337 on the joint 330 is an inwardly recessed groove, and holes are provided at the upper and lower ends of the groove for the traction wire 310 to pass through.

[0029] Reference Figure 2 and Figure 6 In this embodiment, in order to facilitate the installation between the joints 330, the joints 330 are hollow structures, and the rotation connection is achieved by the rotation convex plates 331 and the rotation grooves 332 arranged on both sides in the direction perpendicular to the swing plane of the snake bone 300. The rotation convex plates 331 and the rotation grooves 332 are respectively arranged at the front and rear ends of the joints 330, the rotation convex plates 331 are circular protrusions on the shell of the joints 330, and the rotation grooves 332 are circular grooves matching the rotation convex plates 331. Each joint 330 can be rotationally connected by embedding the rotation convex plates 331 into the rotation grooves 332 of the adjacent joints 330. In order to limit the rotation range between adjacent joints 330 and guide the rotation between joints 330, a fan-shaped limiting groove 333 concentric with the center of the circle of the rotating convex plate 331 is provided at the end of the rotating convex plate 331, and a fan-shaped limiting plate matching the limiting groove 333 is provided in the rotating groove 332, so that when the rotating convex plate 331 is embedded in the rotating groove 332, the limiting plate can be embedded in the limiting groove 333. The curvature of the limiting plate is smaller than that of the limiting groove 333, and the difference between the curvature of the limiting groove 333 and the curvature of the limiting plate is the angular travel of the rotation between adjacent joints 330. Both sides of the rotating convex plate 331 are provided with fan-shaped guide grooves 335 which are concentric with the rotating convex plate 331. The groove wall of the rotating groove 332 is surrounded by two fan-shaped guide convex plates 336 which match the guide grooves 335. When the rotating convex plate 331 is engaged with the rotating groove 332 of the adjacent joint 330, the guide convex plates 336 on both sides of the rotating groove 332 will be embedded in the corresponding guide grooves 335. The curvature of the guide convex plates 336 is smaller than that of the guide grooves 335. When the rotating convex plate 331 rotates in the rotating groove 332, the guide convex plates 336 will also rotate along the guide grooves 335, forming a guide for the rotation between the adjacent joints 330. Figure 2In this embodiment, the head 320 and the tail 340 are also provided with a rotating convex plate 331 or a rotating groove 332, so as to be rotatably connected with the head end or the tail end of the bone joint string. The tail end of the traction wire 310 passes through the guide portion 337 of the tail 340, and the tail end of the traction wire 310 is sleeved with a clamping sleeve 311, so that the traction wire 310 cannot be disengaged from the tail 340. When the traction wheel 530 retracts the traction wire 310 on one side of the snake bone 300, the tail end of the traction wire 310 on this side will apply a force to the tail 340 in the direction of the traction side, and because the length of the traction wire 310 in the snake bone 300 on the traction side is shortened, the snake bone 300 is forced to bend and curl toward the side being pulled, so that the circumference of the snake bone 300 on the side being pulled is re-matched with the length of the released traction wire 310, and the bending direction and angle of the snake bone 300 can be adjusted by adjusting the length of the retracted traction wire 310.

[0030] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An endoscope, characterized in that: include: A handle (100) having a control button (110) disposed on its outer surface and a control circuit (120) disposed inside thereof, wherein the control button (110) is electrically connected to the control circuit (120); An insertion tube (200), one end of which is connected to the handle (100) and can be bent and deformed; The snake bone (300) has traction wires (310) on both sides, can bend and swing in a horizontal plane under the pull of the traction wires (310), and one end is connected to the end of the insertion tube (200) facing away from the handle (100); A camera module (400) is connected to one end of the snake bone (300) facing away from the insertion tube (200), can swing together with the end of the snake bone (300), and is electrically connected to the control circuit (120); The driving mechanism (500) is arranged on a side of the insertion tube (200) close to the snake bone (300), is electrically connected to the control circuit (120), and is used to pull the traction wire (310).

2. The endoscope according to claim 1, characterized in that The driving mechanism (500) comprises a motor (510), a transmission gear set (520) and a traction wheel (530); the traction wheel (530) is rotatably arranged in the insertion tube (200); the traction wire (310) is wound around the traction wheel (530); the motor (510) drives the traction wheel (530) to rotate through the transmission gear set (520), thereby realizing the retraction and extension of the traction wires (310) on both sides of the snake bone (300).

3. The endoscope according to claim 2, characterized in that The transmission gear set (520) comprises a driving bevel gear (521) and a driven bevel gear (522); the driving bevel gear (521) is connected to the output shaft of the motor (510); the driven bevel gear (522) is connected to the traction wheel (530) shaft; the driven bevel gear (522) is meshed with the driving bevel gear (521).

4. The endoscope according to claim 2, characterized in that: Two parallel traction grooves (531) are arranged on the circumferential surface of the traction wheel (530), and the two traction wires (310) on both sides of the snake bone (300) are respectively wound in the two traction grooves (531) in opposite winding directions.

5. The endoscope according to claim 2, characterized in that: The motor (510) is a coreless motor.

6. The endoscope according to claim 1, characterized in that The snake bone (300) comprises a head (320), a tail (340) and a plurality of joints (330), wherein the plurality of joints (330) are connected in rotation in sequence, and both sides of the head (320), the tail (340) and each joint (330) are provided with guide parts (337) for the traction wire (310) to pass through, and one end of a joint string formed by the plurality of joints (330) connected in sequence is connected to the insertion tube (200) through the head (320), and the other end of the joint string is connected to the camera module (400) through the tail (340), and the end of the traction wire (310) is inserted into the tail (340), and both ends of the traction wire (310) are provided with a sleeve (311).

7. The endoscope according to claim 6, characterized in that Each of the joints (330) is provided with a circular rotating convex plate (331) and a circular rotating groove (332) matching the rotating convex plate (331) on both side walls in a direction perpendicular to the swinging plane of the snake bone (300), and the rotating convex plate (331) and the rotating groove (332) are respectively oriented to the front and rear ends of the joint (330), and the rotating convex plate (331) of each joint (330) can be embedded in the rotating groove (332) of the adjacent joint (330) to realize the rotating connection between the joints (330).

8. The endoscope according to claim 7, characterized in that A fan-shaped limiting groove (333) coaxial with the rotating convex plate (331) is arranged at the end of the rotating convex plate (331), and a fan-shaped limiting convex plate (334) matching the limiting groove (333) is arranged in the rotating groove (332), the curvature of the limiting convex plate (334) is smaller than the curvature of the limiting groove (333), and the limiting convex plate (334) of each joint (330) can be embedded in the limiting groove (333) of the adjacent joint (330).

9. The endoscope according to claim 7, characterized in that: The rotating convex plate (331) is provided with fan-shaped guide grooves (335) cocentric with the rotating convex plate (331) on both sides, and the rotating groove (332) is surrounded by two fan-shaped guide convex plates (336) matching the guide grooves (335). The curvature of the guide convex plates (336) is smaller than the curvature of the guide grooves (335). After each joint (330) is connected to the adjacent joint (330), the two guide convex plates (336) can be respectively embedded in the guide grooves (335).

10. The endoscope according to claim 1, characterized in that A waterproof plug (541) is provided between the driving mechanism (500) and the snake bone (300), and the waterproof plug (541) is provided with a through hole through which the traction wire (310) can pass.

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