Rigid insertion tube and rigid endoscope with adjustable viewing angle

Abstract

The present invention discloses a rigid insertion tube and a rigid endoscope with a viewing angle that can be adjusted with movement. The rigid insertion tube with a viewing angle that can be adjusted with movement comprises an outer tube body, an inner tube body and an imaging body. The outer tube body is provided with a first channel and a second channel. The outer tube body is rotatably mounted on an operating body around an axis extending in a front-back direction; the inner tube body is passed through the first channel and fixedly mounted on the operating body; the imaging body comprises a mounting bracket and an imaging component fixedly mounted on the front end of the mounting bracket. The mounting bracket can be rotatably mounted on the inner tube body in multiple directions and is connected and fixed to the outer tube body, so that when an external force drives the outer tube body to rotate relative to the inner tube body, the imaging body rotates with movement and maintains the orientation of the imaging component relative to the second channel fixed. The present invention makes the imaging viewing angle of the imaging component and the relative orientation relationship between the medical device basically remain unchanged, avoids causing inconvenience to the operator, and improves the user experience of the product.

Description

Technical Field

[0001] The invention relates to the technical field of hard endoscopes, and in particular to a hard insertion tube and a hard endoscope with a viewing angle capable of being adjusted dynamically. Background Art

[0002] Existing electronic hard endoscopes generally do not have an angle adjustment function. When used with a viewing angle rotation, the insertion tube rotates as a whole, causing the angle relationship between the medical device installed in the working channel and the camera installed at the head end to change, causing the front and rear distance imaging of the device on the screen to change. When it is located in the opposite direction of the viewing angle, it may even be out of the field of view. The image content will rotate upside down, making it difficult to identify the direction. The operating direction is inconsistent with the image direction. Especially when used with treatment equipment, disorientation will cause safety hazards. And long-term use can easily cause the operator to feel dizzy, vertigo, and nausea. Summary of the invention

[0003] The main purpose of the present invention is to propose a rigid insertion tube and a rigid endoscope with adjustable viewing angle, aiming to solve the problem that the traditional rigid endoscope is prone to change the orientation of the medical device in the imaging picture when used with a rotating viewing angle, increasing the inconvenience of the operator.

[0004] In order to achieve the above-mentioned object, the present invention provides a hard insertion tube with a viewing angle that can be adjusted dynamically, comprising:

[0005] An outer tube body extends in the front-to-back direction, the outer tube body is respectively provided with a first channel and a second channel in the front-to-back direction, and the outer tube body is used to be rotatably mounted on the operating body of the hard endoscope around an axis extending in the front-to-back direction;

[0006] an inner tube body extending in a front-to-rear direction and penetrating through the first passage, the inner tube body being used for being fixedly mounted on the operating body; and

[0007] The imaging body includes a mounting bracket and an imaging component fixedly mounted on the front end of the mounting bracket. The mounting bracket can be mounted on the inner tube body in a multi-directionally rotatable manner and is fixedly connected to the outer tube body so that when an external force drives the outer tube body to rotate relative to the inner tube body, the imaging body rotates accordingly and maintains a fixed position of the imaging component relative to the second channel.

[0008] Optionally, one of the mounting bracket and the inner tube body is provided with a ball groove, and the other one is provided with a ball, and the ball is mounted in the ball groove in a multi-directionally rotatable manner.

[0009] Optionally, the inner tube body comprises a first tube section and a second tube section connected in sequence from front to back, the front end of the first tube section is provided with the ball groove, the side wall of the first tube section is penetrated with an adjustment hole connected to the ball groove, and the adjustment hole extends in an elongated shape in the front-to-back direction;

[0010] The mounting bracket includes the sphere, an annular bracket and a connecting rod. The annular bracket is arranged on the periphery of the first pipe section and is connected and fixed to the outer pipe body. The connecting rod extends radially through the adjustment hole and connects the sphere and the annular bracket.

[0011] Optionally, at least three adjustment holes are arranged at intervals along the circumference of the ball groove;

[0012] The connecting rod is adapted to be arranged in the adjusting hole.

[0013] Optionally, the outer tube body is provided with a partition plate in the first channel along the radial direction, and the partition plate is penetrated with a through hole along the front-back direction;

[0014] At least the first pipe section is movably arranged in the through hole, and the rear end surface of the annular bracket is supported and fixed on the front end surface of the partition.

[0015] Optionally, the front end surface of the outer tube body is arranged to be inclined, and the partition is suitable for extending in the same direction as the front end surface of the outer tube body.

[0016] Optionally, a convex column is protruding from the front end of the sphere, and the convex column penetrates the sphere in the front-to-back direction and is provided with an insertion hole;

[0017] The imaging component comprises an imaging portion and an electrical connection portion, wherein the imaging portion protrudes forward from the convex column, and the electrical connection portion is electrically connected to the imaging portion and is inserted through the insertion hole.

[0018] Optionally, the outer surface of the first tube section is suitable for the sphere to be at least partially spherical;

[0019] The outer diameter of the second pipe section is smaller than the maximum outer diameter of the first pipe section.

[0020] Optionally, the rigid insertion tube with adjustable viewing angle further includes a protective cover plate, which is disposed on a front channel opening of the first channel and is transparent.

[0021] In addition, to achieve the above-mentioned purpose, the present invention also provides a hard endoscope, including an operating body and a hard insertion tube with a viewing angle that can be adjusted as described above.

[0022] In the technical solution provided by the present invention, when the hard insertion tube with adjustable viewing angle is installed to the operating body, since the inner tube body is fixed relative to the operating body and the outer tube body is rotatable around its own axis relative to the operating body, relative rotation movement can be generated between the inner tube body and the outer tube body, and the relative rotation movement process can realize the orientation adjustment of the medical device inserted into the second channel; and since the mounting bracket is rotatably mounted on the inner tube body but fixedly mounted on the outer tube body, during the rotation of the outer tube body relative to the inner tube body, the mounting bracket remains fixed relative to the outer tube body, and the imaging element fixedly mounted on the mounting bracket can be fixed relative to the outer tube body, so that the imaging viewing angle of the imaging element and the relative orientation relationship between the medical device remain basically unchanged, avoiding inconvenience to the operator and improving the user experience of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 the structures shown in these drawings without paying creative work.

[0024] Figure 1 A three-dimensional schematic diagram of an embodiment of a rigid insertion tube with a dynamically adjustable viewing angle provided by the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the main structure of the rigid insertion tube with adjustable mid-viewing angle;

[0026] Figure 3 for Figure 2 A three-dimensional schematic diagram of the middle and outer tube bodies;

[0027] Figure 4 for Figure 2 Schematic diagram of the assembly of the inner tube body and the imaging body;

[0028] Figure 5 for Figure 4 Schematic diagram of the main structural breakdown of the inner tube and the imaging body.

[0029] Description of Figure Numbers:

[0030] 100 outer tube body; 110 first channel; 120 second channel; 130 third channel; 140 partition; 141 through hole; 200 inner tube body; 210 first tube section; 211 ball groove; 212 adjustment hole; 220 second tube section; 300 mounting bracket; 310 sphere; 311 boss; 312 socket; 320 annular bracket; 330 connecting rod; 400 imaging component; 410 imaging part; 420 electrical connection part; 500 protective cover.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] See also Figures 1 to 5The present invention provides a rigid insertion tube with a viewing angle that can be adjusted automatically. The rigid insertion tube with a viewing angle that can be adjusted automatically is mainly used in a rigid endoscope. The rigid endoscope includes an operating body in addition to the rigid insertion tube with a viewing angle that can be adjusted automatically. During surgical treatment, at least part of the rigid insertion tube with a viewing angle that can be adjusted automatically is inserted into the patient's body, and the operating body is externally placed and can be held by an operator to facilitate the manipulation of the rigid insertion tube with a viewing angle that can be adjusted automatically and related medical devices.

[0036] Specifically, the rigid insertion tube with adjustable viewing angle comprises an outer tube body 100, an inner tube body 200 and an imaging body. The outer tube body 100 extends in the front-to-back direction, and is respectively provided with a first channel 110 and a second channel 120 in the front-to-back direction. The outer tube body 100 is used to be rotatably mounted on the operating body of the rigid endoscope around an axis extending in the front-to-back direction; the inner tube body 200 extends in the front-to-back direction and is provided through the first channel 110, and the inner tube body 200 is used to be fixedly mounted on the operating body; the imaging body comprises a mounting bracket 300 and an imaging element 400 fixedly mounted on the front end of the mounting bracket 300, and the mounting bracket 300 is multi-directionally rotatably mounted on the inner tube body 200 and is connected and fixed to the outer tube body 100, so that when an external force drives the outer tube body 100 to rotate relative to the inner tube body 200, the imaging body rotates with it, and the orientation of the imaging element relative to the second channel 120 is maintained fixed.

[0037] In the technical solution provided by the present invention, when the hard insertion tube with adjustable viewing angle is installed to the operating body, since the inner tube body 200 is fixed relative to the operating body and the outer tube body 100 is rotatable around its own axis relative to the operating body, a relative rotation activity can be generated between the inner tube body 200 and the outer tube body 100, and the relative rotation activity process can realize the orientation adjustment of the medical device inserted into the second channel 120; and since the mounting bracket 300 is rotatably mounted on the inner tube body 200 but fixedly mounted on the outer tube body 100, during the rotation of the outer tube body 100 relative to the inner tube body 200, the mounting bracket 300 remains fixed relative to the outer tube body 100, and the imaging element fixedly mounted on the mounting bracket 300 can be fixed relative to the outer tube body 100, so that the imaging viewing angle of the imaging element and the relative orientation relationship between the medical device remain basically unchanged, avoiding inconvenience to the operator and improving the user experience of the product.

[0038] Specifically, the outer tube body 100 is made of a hard material, and its axial direction corresponds to the front-to-back direction, and at least the front end is used to extend into the patient's body. The first channel 110 is used for the imaging subject to be detachably installed; the second channel 120 constitutes a working channel, for example, for the insertion of medical equipment. The first channel 110 and the second channel 120 are arranged at intervals along the radial direction of the outer tube body 100, and generally, the radial cross-sectional area of ​​the second channel 120 is not less than the radial cross-sectional area of ​​the first channel 110. In addition, the outer tube body 100 can also be provided with a third channel 130 along the front-to-back direction. The third channel 130 can be used as a water outlet channel, for example. The third channel 130 can be reasonably arranged by using the remaining space on the outer tube body 100 except the first channel 110 and the second channel 120, for example, it can be opened beside the first channel 110 and the second channel 120. And the third channel 130 can be set as one or at least two according to actual needs.

[0039] The rear end of the outer tube body 100 is rotatably mounted on the front end of the operating body. The rotation axis of the outer tube body 100 is generally set at its central axis. The first channel 110 and the second channel 120 can be, but are not limited to, arranged on both sides of the radial direction of the rotation axis of the outer tube body 100, so that the structural layout of the first channel 110, the second channel 120 and the third channel 130 on the outer tube body 100 is more compact and reasonable.

[0040] The inner tube body 200 is arranged at the first channel 110, and the rear end of the inner tube body 200 is fixedly mounted on the operating body, so that when the operator operates the outer tube body 100 to rotate, it is equivalent to driving the second channel 120 to revolve around the inner tube body 200. At this time, the outer diameter of the inner tube body 200 is generally set to be smaller than the inner diameter of the first channel 110 to avoid friction interference during the relative rotation of the outer tube body 100 and the inner tube body 200. The inner tube body 200 can also be generally made of hard material.

[0041] The imaging components in the imaging subject can be set according to actual needs, such as imaging devices, but not limited to lighting devices. The imaging device can be any suitable imaging product for capturing image information of the diseased part of the patient's body; the lighting device can be a light source integrated at the front end of the rigid insertion tube with adjustable viewing angle, or a light-guiding structure that guides an external light source to the front end of the rigid insertion tube with adjustable viewing angle, such as an optical fiber.

[0042] In view of this, the imaging component generally includes an imaging part 410 and an electrical connection part 420. The imaging part 410 is, for example, an imaging sensor in an imaging device or a light source in an illumination device; the electrical connection part 420 is, for example, a communication cable electrically connected to the imaging part 410.

[0043] When the imaging element is an imaging element and / or an illumination element as described above, in a further solution, the front end surface of the outer tube body 100 can be set as an inclined surface, and specifically extends gradually forward in a direction from the first channel 110 to the second channel 120. When the imaging subject is placed in the first channel 110, in order to achieve good protection of the imaging subject, in a further solution, the hard insertion tube with a viewing angle that can be adjusted also includes a protective cover plate 500, which is covered at the front end channel opening of the first channel 110 and is transparent. The protective cover plate 500 can be, but is not limited to, waterproof and dustproof, and prevents external hard objects from scratching the imaging subject. Since the protective cover plate 500 is transparent, it will not have an adverse effect on the imaging or illumination of the imaging element. Specifically, the protective cover plate 500 can be made of glass material, which has a certain structural strength, transparency and protection.

[0044] The mounting bracket 300 in the imaging main body is firstly connected to the inner tube body 200 in rotation. The rotation connection can be unidirectional or multi-directional, but it should be noted that the rotational freedom between the mounting bracket 300 and the inner tube body 200 basically determines the range of the viewing angle of the imaging element that can be adjusted during the rotation of the outer tube body 100. Therefore, in order to increase the convenience of use, the mounting bracket 300 can be installed on the inner tube body 200 in a multi-directional rotation. For this reason, in practical application, it can be specifically provided that one of the mounting bracket 300 and the inner tube body 200 is provided with a ball groove 211, and the other is provided with a ball 310, and the ball 310 can be installed in the ball groove 211 in a multi-directional rotation. Among them, the ball groove 211 is a groove structure with a shape in the groove that is roughly spherical, and the ball 310 can be a whole ball shape, or a hemispherical shape, etc. When the ball 310 is rotatably installed in the ball groove 211, the outer surface of the ball 310 slides with the inner groove wall of the ball groove 211 to achieve multi-directional rotation.

[0045] Specifically in one embodiment, the mounting bracket 300 may be provided with a ball groove 211 facing backward, and the inner tube 200 may be provided with a ball 310 protruding forward, and the ball 310 may be rotatably matched with the ball groove 211. Figures 2 to 5 As shown, in one embodiment, the inner tube body 200 includes a first tube section 210 and a second tube section 220 connected in sequence from front to back, a ball groove 211 is opened at the front end of the first tube section 210, and an adjustment hole 212 connected to the ball groove 211 is penetrated through the side wall of the first tube section 210, and the adjustment hole 212 extends in an elongated shape along the front-to-back direction; the mounting bracket 300 includes a sphere 310, an annular bracket 320 and a connecting rod 330, the annular bracket 320 is arranged on the periphery of the first tube section 210, and is connected and fixed to the outer tube body 100, and the connecting rod 330 extends radially through the adjustment hole 212 and connects the sphere 310 and the annular bracket 320.

[0046] Among them, since the inner tube body 200 is a structure with a tube hole passing through it in the front-to-back direction, when the aperture of the tube hole is larger than the outer diameter of the sphere 310, the ball groove 211 can be formed by protruding the inner wall of the first tube section 210 by a certain thickness; conversely, when the aperture of the tube hole is smaller than the outer diameter of the sphere 310 and the tube wall is thick enough, the ball groove 211 can be formed by cutting and thinning the inner wall of the first tube section 210; or when the aperture of the tube hole is smaller than the outer diameter of the sphere 310 and the tube wall is not thick enough, the ball groove 211 can be formed by appropriately expanding and deforming the first tube section 210.

[0047] The shape of the inner tube body 200 can be maintained as a straight tube with the same outer diameter from front to back, or the shape of the first tube segment 210 can be adapted to the inner shape of the ball groove 211 and / or the shape of the ball 310 can be set to be substantially the same spherical shape, that is, the outer surface of the first tube segment 210 is at least partially spherical, ensuring that the wall thickness of the first tube segment 210 where the ball groove 211 is formed is as uniform as possible. Next, the outer diameter of the second tube segment 220 can be set to be smaller than the maximum outer diameter of the first tube segment 210, and be in a straight tube shape. Because when the imaging component is installed on the mounting bracket 300, and the mounting bracket 300 is installed on the inner tube body 200, at least the electrical connection part 420 of the imaging component needs to pass through the mounting bracket 300, the first tube section 210 and the second tube section 220 in sequence and then be led out to the operating body. The outer diameter of the electrical connection part 420 is generally not too large. Therefore, the outer diameter of the second tube section 220 can be appropriately reduced. On the one hand, it helps to make the overall structure of the inner tube body 200 lighter, and on the other hand, it also helps to produce a certain contraction and limiting effect on the electrical connection part 420 and the like that passes through the second tube section 220 to avoid entanglement and knotting.

[0048] It should be noted that the ball groove 211 is configured to at least partially cover the outside of the sphere 310, so that the sphere 310 will not slip out of the ball groove 211. For example, the first pipe segment 210 can be, but is not limited to, a non-spherical structure formed by radially cutting a portion not greater than one-half of the radius at the front hemisphere and the rear hemisphere of a whole sphere. In addition, the first pipe segment 210 and the second pipe segment 220 can be obtained by integral molding, or by separate molding and detachable or non-detachable connection.

[0049] An adjustment hole 212 is provided on the radial outer wall of the first pipe section 210. It can be understood that the ball 310 in the mounting bracket 300 is rotatably mounted in the ball groove 211, and the annular bracket 320 is arranged on the outer side of the first pipe section 210, and the adjustment hole 212 is provided for the connecting rod 330 to movably pass through. Specifically, the circumferential dimension of the adjustment hole 212 needs to be appropriately larger than the corresponding dimension of the connecting rod 330 to avoid excessive friction interference between the hole wall of the adjustment hole 212 and the outer wall of the connecting rod 330; however, the circumferential dimension of the adjustment hole 212 should not be too much larger than the corresponding dimension of the connecting rod 330 to avoid causing the ball 310 to drive the imaging element to produce excessive and inappropriate circumferential rotation relative to the first pipe section 210.

[0050] Of course, when it is necessary to operate the imaging part 410 of the imaging component to rotate circumferentially relative to the medical device at the second channel 120, in a further scheme, an extension groove can be opened on the side wall of the adjustment hole 212, that is, along the circumferential extension of the first tube segment 210. The extension groove allows the connecting rod 330 to slide circumferentially, thereby driving the imaging part 410 of the imaging component to rotate circumferentially relative to the inner tube body 200.

[0051] In order to increase the degree of rotational freedom, in one embodiment, at least three adjusting holes 212 are arranged at intervals along the circumference of the ball slot 211; the connecting rod 330 is adapted to be arranged in the adjusting holes 212. Further, each adjusting hole 212 can be arranged at equal intervals along the circumference of the ball slot 211, specifically Figure 5 As shown in the figure, the three adjustment holes 212 are set as an example. The three adjustment holes 212 can be used to divide the entire circumference of the ball slot 211 into three equal parts, which is more helpful to align the ball 310 relative to the rotation axis of the ball slot 211 during installation and rotation.

[0052] The adjustment hole 212 is elongated in the front-to-back direction. Specifically, according to actual needs, the adjustment hole 212 can extend backward to the rear end of the first pipe section 210 or continue to extend to the local pipe section of the second pipe section 220 that is recessed. At this time, when the adjustment hole 212 extends forward to the front end that does not penetrate the first pipe section 210, the circumferential width of the adjustment hole 212 is fixed, and the outer diameter and the inner width of the groove at the position where the ball groove 211 is formed in the first pipe section 210 are fixed. In a further scheme, the adjustment hole 212 can also be set to extend forward to the front end of the first pipe section 210. In particular, when the number of adjustment holes 212 is large, each adjustment hole 212 is equivalent to dividing the front section of the first pipe section 210 into a plurality of elastic arms. Then, to a certain extent, each elastic arm can be operated by external force to gather and deform or expand outward, and the inner size of the ball groove 211 can be appropriately adjusted to improve the structural applicability and versatility of the inner tube body 200.

[0053] The annular bracket 320 needs to be connected and fixed with the outer tube body 100, but does not affect the rotation of the ball body 310 relative to the ball groove 211. Therefore, in a specific embodiment, the outer tube body 100 is provided with a partition 140 in the radial direction in the first channel 110, and the partition 140 is penetrated with a through hole 141 in the front-to-back direction; at least the first pipe section 210 is movably inserted in the through hole 141, and the rear end surface of the annular bracket 320 is supported and fixed on the front end surface of the partition 140. Among them, the outer diameter of the through hole 141 is appropriately larger than the maximum outer diameter of the first pipe section 210, but smaller than the maximum outer diameter of the annular bracket 320, so that the first pipe section 210 can be relatively freely movably inserted in the through hole 141, but the annular bracket 320 is stably supported on the front end surface of the partition 140, and is limited by the through hole 141 and will not fall out backwards. The maximum outer diameter of the annular bracket 320 can be set to be smaller than the inner diameter of the first channel 110 at the location, so that there is a certain movable gap between the outer peripheral side wall of the annular bracket 320 and the inner wall of the first channel 110 at the location. And the outer peripheral side wall of the annular bracket 320 can be set to be a convex arc surface with a certain smooth guiding property.

[0054] Next, the partition 140 is set to be parallel to the front end surface of the outer tube body 100 as much as possible. For example, when the front end surface of the outer tube body 100 is set at an angle as described above, the partition 140 can be set to extend in the same direction as the front end surface of the outer tube body 100 to reduce adverse interference with the rotation of the ball 310 relative to the ball groove 211.

[0055] In order to increase the support strength of the partition 140 to the annular support 320, in a further solution, an interference structure may be optionally provided between the front end surface of the partition 140 and / or the rear end surface of the annular support 320. The interference structure may be, but is not limited to, a concave-convex structure, a rough surface, an anti-slip material layer, and the like.

[0056] There is no restriction on the installation method between the imaging element and the sphere 310, for example Figures 2 to 5 As shown, in one embodiment, a protruding column 311 is protruded from the front end of the sphere 310, and the protruding column 311 penetrates the sphere 310 in the front-to-back direction and is provided with a plug hole 312; the imaging part 410 in the imaging component protrudes forward from the protruding column 311, and the imaging part 410 is penetrated in the plug hole 312. The imaging part 410 can be limited to the protruding column 311 to prevent the imaging part 410 from retracting into the plug hole 312. The protruding column 311 can provide a sufficient outer protective structure to protect the electrical connection part 420, ensure that the structure of the electrical connection part 420 is not easily damaged, and protect the electrical connection between the electrical connection part 420 and the imaging part 410. On the other hand, the protruding column 311 can extend the imaging part 410 forward to a sufficient distance from the sphere 310, and a sufficient distance from the above-mentioned protective cover plate 500.

[0057] In a further solution, the boss 311 can be configured to be telescopically movable in the front-to-back direction, which can be specifically a telescopic deformation activity made of elastic material, or a front-to-back translational telescopic activity composed of, for example, a plurality of telescopic joints connected in sequence. When the boss 311 is telescopically movable, the front-to-back dimension of the boss 311 can be increased or decreased according to actual needs, that is, the spacing of the imaging part 410 relative to the sphere 310 and the spacing of the imaging part 410 relative to the protective cover 500 are reasonably adjusted to the right position. Of course, the front-to-back telescopic activity of the boss 311 is not freely driven. For example, the boss 311 can be configured to be able to telescopically move only when driven by sufficient external force, or a locking structure can be provided between the boss 311 itself, the boss 311 and the peripheral side, such as the outer tube body 100, so that the telescopic activity of the boss 311 can be locked when not needed.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rigid insertion tube with adjustable viewing angle, characterized in that: include: An outer tube body extends in the front-to-back direction, the outer tube body is respectively provided with a first channel and a second channel in the front-to-back direction, and the outer tube body is used to be rotatably mounted on the operating body of the hard endoscope around an axis extending in the front-to-back direction; an inner tube body extending in a front-to-rear direction and penetrating through the first passage, the inner tube body being used for being fixedly mounted on the operating body; and An imaging body, comprising a mounting bracket and an imaging component fixedly mounted on the front end of the mounting bracket, wherein the mounting bracket can be mounted on the inner tube body in a multi-directionally rotatable manner and is connected and fixed to the outer tube body, so that when an external force drives the outer tube body to rotate relative to the inner tube body, the imaging body rotates with it and maintains the orientation of the imaging component fixed relative to the second channel; Wherein, one of the mounting bracket and the inner tube body is provided with a ball groove, and the other one is provided with a ball body, and the ball body can be installed in the ball groove in a multi-directionally rotatable manner.

2. The rigid insertion tube with adjustable viewing angle as claimed in claim 1, characterized in that: The inner tube body comprises a first tube section and a second tube section connected in sequence from front to back, the front end of the first tube section is provided with the ball groove, the side wall of the first tube section is penetrated with an adjustment hole connected to the ball groove, and the adjustment hole is elongated in the front-to-back direction; The mounting bracket includes the sphere, an annular bracket and a connecting rod. The annular bracket is arranged on the periphery of the first pipe section and is connected and fixed to the outer pipe body. The connecting rod extends radially through the adjustment hole and connects the sphere and the annular bracket.

3. The rigid insertion tube with adjustable viewing angle as claimed in claim 2, characterized in that: At least three adjusting holes are arranged at intervals along the circumference of the ball groove; The connecting rod is adapted to be arranged in the adjusting hole.

4. The rigid insertion tube with adjustable viewing angle as claimed in claim 2, characterized in that: The outer tube body is provided with a partition plate in the radial direction in the first channel, and the partition plate is penetrated with a through hole in the front-to-back direction; At least the first pipe section is movably arranged in the through hole, and the rear end surface of the annular bracket is supported and fixed on the front end surface of the partition.

5. The rigid insertion tube with adjustable viewing angle as claimed in claim 4, characterized in that: The front end surface of the outer tube body is arranged obliquely, and the partition is adapted to extend obliquely in the same direction as the front end surface of the outer tube body.

6. The rigid insertion tube with adjustable viewing angle as claimed in claim 2, characterized in that: The front end of the sphere is provided with a convex column, and the convex column penetrates the sphere in the front-to-back direction and is provided with an insertion hole; The imaging component comprises an imaging portion and an electrical connection portion, wherein the imaging portion protrudes forward from the convex column, and the electrical connection portion is electrically connected to the imaging portion and is inserted through the insertion hole.

7. The rigid insertion tube with adjustable viewing angle as claimed in claim 2, characterized in that: The outer surface of the first tube section is suitable for the sphere to be at least partially spherical; The outer diameter of the second pipe section is smaller than the maximum outer diameter of the first pipe section.

8. The rigid insertion tube with adjustable viewing angle as claimed in claim 1, characterized in that: The rigid insertion tube with adjustable viewing angle further comprises a protective cover plate, which is disposed on the front channel opening of the first channel and is transparent.

9. A rigid endoscope, characterized in that: It comprises an operating body and a hard insertion tube with a viewing angle that can be adjusted as described in any one of claims 1 to 8.

Images