3D endoscope

Abstract

The embodiment of the utility model discloses a three-dimensional (3D) endoscope, which relates to the technical field of medical diagnosis instruments and is invented for improving the imaging definition of the endoscope. The 3D endoscope includes: a handle; the first end of the inner tube body is fixedly connected with the handle, and a 3D camera module is arranged on the inner tube body; wherein the 3D camera module comprises a first lens, a second lens, a first image sensor corresponding to the first lens, and a second image sensor corresponding to the second lens; the outer tube body is arranged on the outer side of the inner tube body in a sleeving mode, a lens is arranged on the outer tube body, and the lens is located on the object side of the first lens and the object side of the second lens; wherein the outer tube body is detachably connected with the handle. The embodiment of the utility model is suitable for the occasion of disease examination in the human body.

Description

Technical Field

[0001] The utility model relates to the technical field of medical diagnostic instruments, and in particular to an 8K ultra-high-definition optical endoscope and imaging system. Background Art

[0002] A 3D endoscope is a commonly used medical device that can enter the human body through natural orifices or small surgical incisions to help doctors diagnose and treat diseases. Examples include gastroscopes, sinusoscopes, and laparoscopes.

[0003] To prevent cross infection, existing 3D endoscopes usually need to be disinfected after clinical use. However, even after disinfection, there is a risk that the disinfection may not be thorough enough, and cross infection may still occur during the next use, posing a safety hazard. Summary of the Invention

[0004] In view of this, an embodiment of the present invention provides a 3D endoscope that can improve safety in clinical applications.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A 3D endoscope comprises: a handle; an inner tube body, a first end of the inner tube body being fixedly connected to the handle, and a 3D camera module being provided on the inner tube body; wherein the 3D camera module comprises a first lens and a second lens, a first image sensor corresponding to the first lens, and a second image sensor corresponding to the second lens; an outer tube body, the outer tube body being sleeved on the outside of the inner tube body, and a lens being provided on the outer tube body, the lens being located on the object side of the first lens and the second lens; wherein the outer tube body is detachably connected to the handle.

[0007] According to an implementation of an embodiment of the present invention, the lens is a prism, the light incident surface of the prism faces the outside of the outer tube body, and a preset angle is formed between the light incident surface and the central axis of the outer tube body; the light exit surface of the prism corresponds to the first lens and the second lens;

[0008] The outer tube body is rotatably connected to the handle; by rotating the outer tube body, the outer tube body can rotate relative to the handle and the inner tube body.

[0009] According to an implementation method of an embodiment of the present utility model, a rotating handwheel is connected between the outer tube body and the handle; the rotating handwheel is rotatably connected to the handle; the outer tube body and the rotating handwheel are detachably connected, and / or the rotating handwheel is detachably connected to the handle; by rotating the rotating handwheel, the rotating handwheel drives the outer tube body to rotate relative to the inner tube body.

[0010] According to an implementation method of an embodiment of the present utility model, an intermediate connecting piece is provided between the outer tube body and the rotating handwheel; the outer tube body is fixedly connected to the intermediate connecting piece, and the intermediate connecting piece is detachably connected to the rotating handwheel.

[0011] According to an implementation method of an embodiment of the present utility model, the intermediate connecting piece is cylindrical; one end of the intermediate connecting piece is threadedly connected to the outer tube body through an internal thread, and the other end of the intermediate connecting piece is a plug-in head; the rotating hand wheel is provided with a plug-in groove that is interference fit with the plug-in head.

[0012] According to an implementation of the embodiment of the present utility model, the imaging target surface of the first image sensor and the imaging target surface of the second image sensor respectively have an angle greater than 0 degrees and less than 90 degrees with the central axis of the inner tube body;

[0013] A first prism is provided between the first lens and the imaging target surface of the first image sensor, and a second prism is provided between the second lens and the imaging target surface of the second image sensor.

[0014] According to an implementation method of an embodiment of the present utility model, the angle between the imaging target surface of the first image sensor and the imaging target surface of the second image sensor and the central axis of the inner tube body is greater than or equal to 20 degrees and less than or equal to 60 degrees; and the imaging target surface of the first image sensor and the imaging target surface of the second image sensor are arranged in a V-shape or an inverted eight-shape.

[0015] According to an implementation method of an embodiment of the present utility model, a seat is provided at the end of the inner tube body away from the handle; a V-shaped groove is provided on the seat, the first image sensor is provided on one side wall of the V-shaped groove, and the second image sensor is provided on the other side wall of the V-shaped groove, and the imaging target surface of the first image sensor and the imaging target surface of the second image sensor are opposite to each other.

[0016] According to an implementation method of an embodiment of the present utility model, a threading hole connected to the V-shaped groove is further provided on the base body, and the threading hole is connected to the lumen in the inner tube body; the connecting wires of the first image sensor and the second image sensor are arranged in the lumen of the inner tube body through the threading hole.

[0017] According to an implementation method of an embodiment of the present utility model, the outer tube body includes a first tube body and a second tube body sleeved on the outside of the first tube body; an optical fiber is passed between the outer surface of the first tube body and the inner surface of the second tube body; a light source connector is provided on the second tube body for connecting to an external light source to provide illumination to the object side of the 3D endoscope through the optical fiber; wherein, the first tube body is sleeved on the outside of the inner tube body.

[0018] The 3D endoscope provided in this embodiment utilizes a detachable connection between the outer tube and the handle, making the outer tube disposable. After clinical use, the outer tube can be disassembled and discarded, and then replaced with a new outer tube for reuse. This avoids cross-infection and improves safety in clinical applications. Furthermore, after clinical use, the 3D endoscope in this embodiment only requires disassembly and disposal of the outer tube, while the remaining structure can be reused. This improves clinical safety while effectively controlling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the 3D endoscope of the present utility model;

[0021] Figure 2 for Figure 1 Schematic cross-sectional view of ;

[0022] Figure 3 for Figure 1 A schematic cross-sectional view of (showing the location of the partial enlargement);

[0023] Figure 4 for Figure 3 A partial enlarged schematic diagram of point A in the middle;

[0024] Figure 5 This is a cross-sectional schematic diagram of a disassembled outer tube body (disposable structure) with an intermediate connecting piece in one embodiment of the present invention;

[0025] Figure 6 This is a cross-sectional schematic diagram of a disassembled reusable structure in one embodiment of the present invention;

[0026] Figure 7 This is a schematic cross-sectional view of an intermediate connecting piece connecting the outer tube body and the rotating hand wheel in one embodiment of the present utility model;

[0027] Figure 8 This is a schematic cross-sectional view of the base of the camera module in one embodiment of the present invention;

[0028] Figure 9 In another embodiment Figure 3 A local enlarged schematic diagram of point A in the middle. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a 3D endoscope that is partially disposable and partially reusable. After clinical use, the disposable structure can be disassembled and discarded, and the remaining structure can be reused as a reusable structure, thereby improving safety and reducing clinical application costs.

[0032] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0033] Implementation Method 1

[0034] See Figure 1 and Figure 2 The 3D endoscope 1 of this embodiment includes a handle 2, an inner tube 3 and an outer tube 4.

[0035] The 3D endoscope 1 may also be referred to as an endoscope capable of achieving three-dimensional stereoscopic imaging, and may specifically be a sinusoscope, a laparoscope, or the like.

[0036] The handle 2 is a hand-held portion used by clinical users to hold and manipulate the 3D endoscope.

[0037] The inner tube body 3 can be a hard tube body, and its first end is fixedly connected to the handle 2. A 3D camera module 30 is provided on the inner tube body 3 for realizing 3D camera.

[0038] See Figure 3 The 3D camera module 30 includes a first lens 301 and a second lens 302 , a first image sensor 303 corresponding to the first lens 301 , and a second image sensor 304 corresponding to the second lens 302 .

[0039] The first lens 301 is used to form a first optical image of the observed object. The first optical image is formed on the imaging target surface of the first image sensor 303 , and the first image sensor 303 performs photoelectric conversion to obtain an electrical signal of the first optical image.

[0040] Similarly, the second lens 302 is used to form a second optical image of the same observed object. The second optical image is formed on the imaging target surface of the second image sensor 304, and the second image sensor 304 performs photoelectric conversion to obtain an electrical signal of the second optical image.

[0041] The electrical signal of the first optical image and the electrical signal of the second optical image can be transmitted to an image processing device (not shown in the figure) via wired or wireless means. After the image processing device processes the electrical signal of the first optical image and the electrical signal of the second optical image, a stereoscopic image of the observed object can be obtained, and the stereoscopic image can be displayed through a display (not shown in the figure).

[0042] See Figure 2 The outer tube body 4 can also be a hard tube body, which is sleeved on the outer side of the inner tube body 3.

[0043] The outer tube 4 is provided with a lens 401. When the outer tube 4 is positioned outside the inner tube 3, the lens 401 is located on the object side of the first lens 301 and the second lens 302. The lens 401 can be a plane mirror, a convex mirror, or a prism made of materials such as glass or resin. The lens 401 can be adhered to the end of the outer tube 4 using a colloid, thereby sealing the end of the outer tube 4. This prevents bodily fluids and other substances from entering the outer tube 4 and contaminating the 3D camera module 30 during clinical use, thereby protecting the 3D camera module 30.

[0044] The outer tube 4 is detachably connected to the handle 2. This detachable connection means that the outer tube 4 and handle 2 are separate structures, not an integrated structure. The detachable connection between the outer tube 4 and handle 2 can be achieved in a variety of ways, such as a threaded connection, a pluggable connection, a snap-on connection, a magnetic connection, and so on.

[0045] In the 3D endoscope 1 of this embodiment, the outer tube 4 and the handle 2 are connected in a detachable manner, making the outer tube 4 a disposable structure. After clinical use, the outer tube 4 can be disassembled and discarded, and then replaced with a new outer tube 4 for reuse. This can avoid cross infection and improve safety in clinical application. In addition, after clinical use, the 3D endoscope 1 of this embodiment only disassembles and discards the outer tube 4, and the remaining structure can be reused as a reusable structure, thereby improving clinical safety while effectively controlling costs.

[0046] As mentioned above, the lens 401 on the outer tube 4 can be a plane mirror, a convex mirror or a prism.

[0047] If the lens 401 on the outer tube 4 is a plane mirror or a convex mirror, the viewing angle of the 3D endoscope 1 is 0 degrees. However, when a convex mirror is used, the 3D endoscope 1 can have a larger field of view than when a plane mirror is used, for example, a field of view of 60-75 degrees.

[0048] If the lens 401 on the outer tube 4 is a prism (such as Figure 2 ), the 3D endoscope 1 can have a viewing angle greater than 0 degrees, such as a viewing angle of 15 degrees, 20 degrees, or 30 degrees. Specifically, the light incident surface of the prism faces the exterior of the outer tube 4, and a predetermined angle is formed between the light incident surface and the central axis of the outer tube 4. The light exit surface of the prism corresponds to the first lens 301 and the second lens 302. The viewing angle refers to the angle formed by the visual axis of the endoscope and the main axis of the endoscope body. The visual axis of the endoscope is the normal direction of the light incident surface of the prism.

[0049] In the case where the lens 401 on the outer tube 4 is a prism, the outer tube 4 is rotatably connected to the handle 2. Thus, when the outer tube 4 is rotated, the outer tube 4 can rotate relative to the handle 2 and the inner tube 3, thereby driving the light incident surface of the prism to face different directions, thereby changing the observation range.

[0050] See Figure 3 and Figure 4 In some embodiments, the outer tube 4 can be a double-tube structure. Specifically, the outer tube 4 includes a first tube 41 for being sleeved on the outside of the inner tube 3 and a second tube 42 sleeved on the outside of the first tube 41. An optical fiber (not shown) is passed through the outer surface of the first tube 41 and the inner surface of the second tube 42. A light source connector 43 (see FIG. 1 ) is provided on the second tube 42. Figure 1 and Figure 2 ), which is used to connect an external light source to provide illumination to the object side of the 3D endoscope 1 through the optical fiber between the first tube body 41 and the second tube body 42. The outer tube body 4 adopts the above-mentioned double-tube structure, which makes it easier to arrange the optical fiber and to insert it into and remove it from the inner tube body 3.

[0051] In other embodiments, the outer tube 4 may also be a single tube structure. An optical fiber may be provided between the outer tube 4 and the inner tube 3. The outer tube 4 is provided with a light source connector for connecting to an external light source to provide illumination to the object side of the 3D endoscope 1 through the optical fiber.

[0052] Implementation Method 2

[0053] In the first embodiment, when the outer tube body 4 and the handle 2 are rotatably connected, the outer tube body 4 and the handle 2 are directly connected. Figure 1 and Figure 2 In this embodiment, in order to facilitate the control of the outer tube body 4 to rotate relative to the handle 2, a rotating hand wheel 5 is connected between the outer tube body 4 and the handle 2.

[0054] The rotating hand wheel 5 is rotatably connected to the handle 2. Figure 2 In the illustrated embodiment, an I-shaped connector 7 is provided between the rotating handwheel 5 and the handle 2. A first end of the I-shaped connector 7 is fixedly connected to the handle 2, and a second end of the I-shaped connector 7 is rotatably connected to the rotating handwheel 5. The rotating handwheel 5 may comprise two halves that snap together to form the rotating handwheel 5. The second end of the I-shaped connector 7 is secured within a cavity formed by the snapping of the two halves, ensuring that the rotating handwheel 5 can rotate relative to the handle 2 while preventing the rotating handwheel 5 from separating from the handle 2. The inner tube 3 can be fixedly attached to the I-shaped connector 7 to achieve a fixed connection with the handle 2.

[0055] While keeping the handle 2 stationary, the rotating hand wheel 5 is rotated to drive the outer tube 4 to rotate relative to the inner tube 3, thereby driving the light incident surface of the prism to face different directions, thereby changing the observation range.

[0056] In order to maintain the disposable structure and function of the outer tube body 4, the outer tube body 4 is detachably connected to the rotating hand wheel 5. In this way, after clinical use, the outer tube body 4 can be disassembled from the rotating hand wheel 5 and discarded ( Figure 5 The remaining structure (including the rotating hand wheel 5) can be used again as a reusable structure ( Figure 6 The reusable part is shown), which can improve the safety of use and reduce the cost of clinical application.

[0057] The outer tube 4 and the rotating hand wheel 5 are detachably connected, meaning that the outer tube 4 and the rotating hand wheel 5 are separate structures, not an integrated structure. The detachable connection between the two can be achieved in a variety of ways, such as a threaded connection, a pluggable connection, a snap connection, a magnetic connection, etc.

[0058] In some embodiments, the outer tube 4 and the rotating hand wheel 5 can be directly connected. Figure 2 In the illustrated embodiment, an intermediate connecting member 6 is provided between the outer tube body 4 and the rotating hand wheel 5 . The outer tube body 4 and the intermediate connecting member 6 are fixedly connected, and the intermediate connecting member 6 and the rotating hand wheel 5 are detachably connected.

[0059] See Figure 7 In some embodiments, the intermediate connecting member 6 may be cylindrical.

[0060] One end of the intermediate connector 6 is fixedly connected to the outer tube 4. For example, the connection can be fixed by bonding, or by using Figure 2 Specifically, the internal thread 61 at one end of the intermediate connector 6 is connected to the external thread on the outer tube body 4. The intermediate connector 6 is fixedly connected to the outer tube body 4, and the two can be separated from the rotating hand wheel 5 and discarded (as shown). Figure 5 shown).

[0061] See Figure 5-Figure 7 In some embodiments, the intermediate connector 6 and the rotating handwheel 5 are connected in a pluggable, fixed manner. Specifically, the other end of the intermediate connector 6 is a plug-in connector 62, and the rotating handwheel 5 is provided with a corresponding plug-in connector slot 52 that is an interference fit with the plug-in connector. When the plug-in connector 62 at the other end of the intermediate connector 6 is inserted into the plug-in connector slot 52 with force, the plug-in connector 62 and the plug-in connector slot 52 form an interference fit, thereby fixedly connecting the outer tube 4 and the intermediate connector 6. By applying force in the opposite direction, the plug-in connector 62 at the other end of the intermediate connector 6 can be pulled out of the plug-in connector slot 52.

[0062] Implementation Method 3

[0063] The structure of this embodiment is basically the same as that of the first or second embodiment, except that in the first or second embodiment, the imaging target surface of the first image sensor 303 and the imaging target surface of the second image sensor 304 can be arranged in parallel, that is, both can be perpendicular to the central axis of the inner tube body 3; while in this embodiment, see Figure 4 As shown, the imaging target surface of the first image sensor 303 and the imaging target surface of the second image sensor 304 have an angle greater than 0 degree and less than 90 degrees with the central axis of the inner tube body 3, respectively. This can minimize the radial dimension jointly occupied by the first image sensor 303 and the second image sensor 304. In other words, the outer diameter of the outer tube body 4 can be minimized (making the outer diameter of the outer tube body 4 as thin as possible).

[0064] In order to adapt to the above-mentioned arrangement of the imaging target surface of the first image sensor 303 and the imaging target surface of the second image sensor 304, and to enable the first optical image of the observed object formed by the first lens 301 to be formed on the imaging target surface of the first image sensor 303, and to enable the second optical image of the observed object formed by the second lens 302 to be formed on the imaging target surface of the second image sensor 304, a first prism 305 is provided between the first lens 301 and the imaging target surface of the first image sensor 303, and a second prism 306 is provided between the second lens 302 and the imaging target surface of the second image sensor 304.

[0065] In some embodiments, the angle between the imaging target surface of the first image sensor 303 and the imaging target surface of the second image sensor 304 and the central axis of the inner tube body 3 is greater than or equal to 20 degrees and less than or equal to 60 degrees, and is preferably any angle between 40 degrees and 45 degrees (including 40 degrees or 45 degrees). This can take into account both the ability to obtain more light flux on the first image sensor 303 and the second image sensor 304 (correspondingly, having higher imaging quality) and the smaller outer diameter of the outer tube body 4.

[0066] In order to enable the first image sensor 303 and the second image sensor 304 to synchronously image the same observed object and provide 3D imaging quality, the imaging target surface of the first image sensor 303 and the imaging target surface of the second image sensor 304 are arranged in a V shape or an inverted eight shape.

[0067] In some embodiments, the 3D imaging module can be bonded to the port of the inner tube 3. The present invention is not limited thereto. In order to facilitate the installation and fixation of the 3D module, Figure 4 In the embodiment shown, the end of the inner tube 3 away from the handle 2 is provided with a seat 8, and a V-shaped groove 81 is opened on the seat 8 (see Figure 8 ), the first image sensor 303 is disposed on one side wall of the V-shaped groove 81, and the second image sensor 304 is disposed on the other side wall of the V-shaped groove 81. The imaging target surface of the first image sensor 303 and the imaging target surface of the second image sensor 304 are opposite. The base 8 can be fixed to the end of the inner tube 3 away from the handle 2 by bonding, and the first image sensor 303 and the second image sensor 304 can also be fixed to the V-shaped groove 81 by bonding.

[0068] During assembly, the first image sensor 303 and the second image sensor 304 are first bonded and fixed within the V-groove 81, the first prism 305 is bonded and fixed to the first image sensor 303, the second prism 306 is bonded and fixed to the second image sensor 304, the first lens 301 is bonded and fixed to the first prism 305, and the second lens 302 is bonded and fixed to the second prism 306, thereby forming a relatively fixed camera module. The base 8 is then bonded and fixed to the end of the inner tube 3 away from the handle 2. The base 8 with the V-groove 81 provides stable and reliable support for the first image sensor 303 and the second image sensor 304, and also facilitates rapid assembly of the 3D imaging module.

[0069] See Figure 9 In some other embodiments, the 3D imaging module may further include a first sleeve 90 and a second sleeve 92 .

[0070] The first sleeve 90 is sleeved around the outer periphery of the first prism 305 and the second prism 306. The first end of the first sleeve 90 is bonded to the end of the base 8. The first prism 305 and the second prism 306 can be fixed to the inner wall of the first sleeve 90 via a colloid 91. Alternatively, the first prism 305 and the second prism 306 can be embedded in a prism fixing groove on the inner wall of the first sleeve 90.

[0071] The second sleeve 92 is fitted around the periphery of the first and second lenses 301, 302 to provide protection and support for them. The first end of the second sleeve 92 is bonded to the second end of the first sleeve 90. The sides of the first and second lenses 301, 302 are secured to the inner wall of the second sleeve 92 via a colloid (not shown). The colloid between the sides of the first and second lenses 301, 302 and the inner wall of the second sleeve 92 is opaque. This not only bonds and secures the first and second lenses 301, 302 to the inner wall of the second sleeve 92, but also prevents light from entering the first and second prisms 305, 306, or the first and second image sensors 303, 304, through the gap between the sides of the first and second lenses 301, 302 and the inner wall of the second sleeve 92.

[0072] The first sleeve 90 and the second sleeve 92 are both light-proof sleeves, which can prevent stray light from entering the first prism 305 and the second prism 306 .

[0073] The object-side ends of the first lens 301 and the second lens 302 are 1-2 mm away from the port of the second end of the second sleeve 92. When the outer tube 4 is sleeved onto the inner tube 3 from the free end thereof and pushed toward the handle 2 so that the outer tube 4 is entirely sleeved onto the inner tube 3, when pushed to a certain extent, the end surface of the second end of the second sleeve 92 abuts against the prism 401 at the end of the outer tube 4, acting as a stop.

[0074] The first image sensor 303 and the second image sensor 304 can transmit the electrical signal of the first optical image and the electrical signal of the second optical image to the image processing device respectively through wireless communication (such as Bluetooth or WiFi). The embodiment of the utility model is not limited to this. Figure 4 In the embodiment shown, the first image sensor 303 and the second image sensor 304 transmit the electrical signals of the first optical image and the second optical image to the image processing device (not shown) via wired communication. Figure 8 The base body 8 is also provided with a threading hole 82 connected to the V-shaped groove 81, and the threading hole is connected to the lumen in the inner tube body 3; the connecting wires of the first image sensor 303 and the second image sensor 304 are arranged in the lumen of the inner tube body 3 through the threading hole 82.

[0075] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0076] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A 3D endoscope, characterized in that: include: handle; an inner tube body, wherein a first end of the inner tube body is fixedly connected to the handle, and a 3D camera module is provided on the inner tube body; wherein the 3D camera module includes a first lens and a second lens, a first image sensor corresponding to the first lens, and a second image sensor corresponding to the second lens; an outer tube body, the outer tube body being sleeved on the outer side of the inner tube body, the outer tube body being provided with a lens, the lens being located on the object side of the first lens and the second lens; Wherein, the outer tube body is detachably connected to the handle.

2. The 3D endoscope according to claim 1, characterized in that The lens is a prism, the light incident surface of the prism faces the outside of the outer tube body, and a preset angle is formed between the light incident surface and the central axis of the outer tube body; the light exit surface of the prism corresponds to the first lens and the second lens; The outer tube body is rotatably connected to the handle; by rotating the outer tube body, the outer tube body can rotate relative to the handle and the inner tube body.

3. The 3D endoscope according to claim 2, characterized in that A rotating hand wheel is connected between the outer tube body and the handle; The rotating hand wheel is rotatably connected to the handle; The outer tube is detachably connected to the rotating handwheel, and / or the rotating handwheel is detachably connected to the handle; The rotating hand wheel is rotated to drive the outer tube body to rotate relative to the inner tube body.

4. The 3D endoscope according to claim 3, characterized in that An intermediate connecting piece is provided between the outer tube body and the rotating hand wheel; The outer tube body is fixedly connected to the intermediate connecting piece, and the intermediate connecting piece is detachably connected to the rotating handwheel.

5. The 3D endoscope according to claim 4, characterized in that The intermediate connecting piece is cylindrical; One end of the intermediate connector is threadedly connected to the outer tube body via an internal thread, and the other end of the intermediate connector is a plug connector; The rotating hand wheel is provided with an insertion groove which is interference fit with the insertion head.

6. The 3D endoscope according to claim 1, wherein: The imaging target surface of the first image sensor and the imaging target surface of the second image sensor respectively have an angle greater than 0 degrees and less than 90 degrees with the central axis of the inner tube body; A first prism is provided between the first lens and the imaging target surface of the first image sensor, and a second prism is provided between the second lens and the imaging target surface of the second image sensor.

7. The 3D endoscope according to claim 6, characterized in that The included angle between the imaging target surface of the first image sensor and the imaging target surface of the second image sensor and the central axis of the inner tube body is greater than or equal to 20 degrees and less than or equal to 60 degrees; The imaging target surface of the first image sensor and the imaging target surface of the second image sensor are arranged in a V shape or an inverted eight shape.

8. The 3D endoscope according to claim 6 or 7, characterized in that: A seat is provided at the end of the inner tube away from the handle; A V-shaped groove is provided on the base body, the first image sensor is arranged on one side wall of the V-shaped groove, and the second image sensor is arranged on the other side wall of the V-shaped groove, and the imaging target surface of the first image sensor is opposite to the imaging target surface of the second image sensor.

9. The 3D endoscope according to claim 8, characterized in that The seat body is further provided with a threading hole connected to the V-shaped groove, and the threading hole is connected to the lumen in the inner tube body; The connecting wires of the first image sensor and the second image sensor are arranged in the lumen of the inner tube body through the threading holes.

10. The 3D endoscope according to claim 1, wherein The outer tube body includes a first tube body and a second tube body sleeved outside the first tube body; An optical fiber is passed between the outer surface of the first tube body and the inner surface of the second tube body; The second tube body is provided with a light source connector for connecting to an external light source to provide illumination to the object side of the 3D endoscope through the optical fiber; Wherein, the first tube body is sleeved on the outside of the inner tube body.

Images