Focusing components and endoscopes

Abstract

The present invention relates to a focusing assembly and an endoscope. The focusing assembly includes a lens mount, a lens assembly, a photosensitive element, an adjusting member, and a transmission member. The lens mount is provided with a mounting position, the lens assembly is provided in the mounting position, and the optical axis of the lens assembly and the axis of the lens mount are arranged at an angle to each other. The photosensitive element is located on the optical axis of the lens assembly. The adjusting member is fixedly connected to the photosensitive element, and the transmission member is located on the axis of the lens mount. One of the lens mount and the adjusting member is provided with a first guide rail parallel to the optical axis of the lens assembly, and the other is provided with a first guide portion that slidably engages with the first guide rail. One of the adjusting member and the transmission member is provided with a second guide rail that is arranged at an angle to each other with the optical axis of the lens assembly and the axis of the lens mount, and the other is provided with a second guide portion that slidably engages with the second guide rail. The above-mentioned focusing assembly disperses force on the two guide rails, reducing friction between the guide rails and the guide portion, thereby expanding the scope of use of the focusing assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of detection instruments, and in particular to a focusing component and an endoscope. Background Art

[0002] Most existing endoscope focusing mechanisms can only move along the axial direction of the scope, making them suitable only for structures with a field of view of 0°. However, endoscopes with a field of view of 0° are limited in their use cases and cannot support the development of emerging technologies such as single-port laparoscopic surgery.

[0003] The focusing mechanism of some endoscopes can also achieve tilt focusing, but the tilt angle that can be met is small, the usage scenarios are still relatively limited, and the focusing stability is poor. Summary of the Invention

[0004] Based on this, it is necessary to provide a focusing assembly and an endoscope to address the above problems. The focusing assembly can meet the needs of a wide range of tilt focusing and has good focusing stability.

[0005] The present invention first provides a focusing assembly, comprising: a lens mount, provided with a mounting position; a lens assembly, arranged at the mounting position, and the optical axis of the lens assembly is arranged at an angle to the axis of the lens mount; a photosensitive element, located on the optical axis of the lens assembly; an adjusting member, fixedly connected to the photosensitive element to drive the photosensitive element; and a transmission member, located on the axis of the lens mount; wherein, one of the lens mount and the adjusting member is provided with a first guide rail parallel to the optical axis of the lens assembly, and the other is provided with a first guide portion slidably engaged with the first guide rail; one of the adjusting member and the transmission member is provided with a second guide rail arranged at an angle to the optical axis of the lens assembly and the axis of the lens mount, and the other is provided with a second guide portion slidably engaged with the second guide rail.

[0006] In the above-mentioned focusing assembly, a first guide rail and a first guide part are provided which are parallel to the optical axis of the lens assembly, and a second guide rail and a second guide part which are arranged at an angle to the optical axis of the lens assembly and the axis of the lens mount. The force is dispersed on the two guide rails, thereby reducing the separation on each guide rail and the friction between the guide rail and the guide part. Even if the field of view angle is large, it can be adjusted, thereby expanding the scope of use of the focusing assembly; and, by cooperating with the two sets of guide rails and driving the adjustment part to slide by a rigid transmission part, the stability during focusing can be improved, thereby improving the focusing accuracy.

[0007] In one embodiment, one of the lens mount and the transmission member is provided with a third guide rail parallel to the axis of the lens mount, and the other is provided with a third guide portion slidably engaged with the third guide rail.

[0008] With such arrangement, the third guide rail and the third guide portion can ensure that the transmission member always slides along the axis of the lens mount, thereby further improving the stability of the focusing assembly during focusing.

[0009] In one embodiment, the lens mount is provided with a first sliding groove, and the transmission member is slidably provided in the first sliding groove; the transmission member is provided with a second sliding groove, and the adjustment member is slidably provided in the second sliding groove.

[0010] Such an arrangement can reduce the overall volume of the lens mount, the adjusting member and the transmission member when they slide against each other.

[0011] In one embodiment, the inner wall of the first sliding groove is provided with the first guide portion, and the outer wall of the adjusting member is provided with the first guide rail; and / or the outer wall of the adjusting member is provided with the second guide rail, and the inner wall of the second sliding groove is provided with the second guide portion; and / or the inner wall of the first sliding groove is provided with a third guide rail, and the outer wall of the transmission member is provided with the third guide portion.

[0012] In one embodiment, the angle α between the axis of the lens mount and the optical axis of the lens assembly satisfies 0°<α<180°.

[0013] Such an arrangement enables the focusing component to have a wider range of uses.

[0014] The present invention also provides an endoscope, comprising an outer tube, a drive assembly and the above-mentioned focusing assembly, wherein the focusing assembly and the drive assembly are respectively arranged at both ends of the outer tube, and the axis of the lens mount is parallel to the axis of the outer tube, and the drive assembly is used to drive the transmission member.

[0015] With this arrangement, the user can drive the transmission member to slide along the axis of the lens holder through the drive assembly arranged at the other end of the outer tube, thereby facilitating the user to focus the endoscope.

[0016] In one embodiment, the driving assembly includes a hollow rotating member rotatably connected to an end of the outer tube away from the focusing assembly, and the inner wall of the rotating member is provided with an internal thread; the driving assembly also includes a sliding member slidably arranged in the rotating member, the sliding member is provided with an external thread that cooperates with the internal thread of the rotating member, and the sliding member is connected to the transmission member through a connecting rod.

[0017] With such an arrangement, when the rotating part rotates, the internal thread on the inner wall of the rotating part cooperates with the external thread of the sliding part, thereby driving the sliding part to slide along the axis of the lens mount. The sliding part drives the axis of the transmission part lens mount to slide through the connecting rod. The thread cooperation can realize stepless adjustment and high-precision focusing.

[0018] In one embodiment, the driving assembly further includes a limiting member arranged in the rotating member, the limiting member includes a first limiting portion sleeved on the outside of the outer tube, and the inner wall of the rotating member is provided with a first step and a second step respectively clamped at both ends of the first limiting portion.

[0019] With this arrangement, the first limiting portion can limit the sliding of the rotating portion along the axis of the lens mount.

[0020] In one embodiment, the limiting member further includes a second limiting portion provided at one end of the first limiting portion, the second limiting portion includes a first plane, and the sliding member includes a second plane slidably engaged with the first plane.

[0021] With this arrangement, the second limiting portion can limit the sliding member from rotating around the axis of the lens mount.

[0022] In one embodiment, the endoscope further includes a control component disposed within the outer tube.

[0023] So configured, the control component can control the endoscope and send data and control signals to external devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of an endoscope according to an embodiment of the present invention;

[0026] Figure 2 The present invention provides Figure 1 Schematic diagram of the cross-sectional structure;

[0027] Figure 3 The present invention provides Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 4 The present invention provides Figure 1 Schematic diagram of the explosion structure;

[0029] Figure 5 The present invention provides Figure 4 Schematic diagram of the enlarged structure at B in the middle;

[0030] Figure 6 A schematic diagram of the focusing structure of the focusing assembly provided by the present invention;

[0031] Figure 7 A schematic diagram of the three-dimensional structure of the lens mount provided by the present invention;

[0032] Figure 8 A schematic diagram of the three-dimensional structure of the adjusting member provided by the present invention;

[0033] Figure 9 A schematic diagram of the three-dimensional structure of the transmission member provided by the present invention;

[0034] Figure 10 A schematic diagram of a three-track configuration according to an embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of a three-track configuration according to another embodiment of the present invention.

[0036] Reference numerals: 1, lens mount; 11, mounting position; 12, first guide portion; 13, third guide rail; 14, first sliding groove; 2, lens assembly; 21, lens body; 22, light source; 23, filter lens; 3, photosensitive element; 4, adjustment member; 41, first guide rail; 42, second guide rail; 5, transmission member; 51, second guide portion; 52, third guide portion; 53, second sliding groove; 6, outer tube; 61, through hole; 7, drive assembly; 71 , rotating part; 711, first rotating part; 7111, first step; 712, second rotating part; 7121, second step; 72, sliding part; 721, second plane; 73, connecting rod; 74, limiting part; 741, first limiting part; 742, second limiting part; 7421, first plane; 8, control component; 81, circuit board; 811, first circuit board; 812, second circuit board; 82, button; 83, wire; 84, bracket. DETAILED DESCRIPTION

[0037] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0040] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0042] Most existing endoscope focusing mechanisms can only move along the axis of the scope body, and this type of focusing mechanism is only suitable for structures with a viewing angle of 0°. However, the use scenarios of endoscopes with a field of view angle of 0° are relatively limited and cannot support the development of emerging technologies such as single-port laparoscopic surgery. Some endoscope focusing mechanisms can also achieve tilt focusing, for example, by setting a guide rail parallel to the optical axis of the lens and connecting the photosensitive element to the drive element at the other end of the endoscope through a flexible connector, so that the photosensitive element can slide along the guide rail for focusing. However, when the field of view angle is large, this method will cause the friction between the photosensitive element and the guide rail to be large, and the component of the power in the direction perpendicular to the guide rail is much greater than the component of the power in the direction along the guide rail, resulting in the photosensitive element being unable to slide. Therefore, the tilt angle that can be met by the existing tilt focusing assembly is still small, and the use scenarios are still relatively limited. In addition, the use of flexible elements for connection makes the focusing stability poor and the focusing accuracy low.

[0043] In order to solve the above problems, Figures 1 to 11 As shown, the present invention provides a focusing assembly and an endoscope, wherein the focusing assembly can meet a wide range of tilt focusing and has good focusing stability.

[0044] like Figure 4 and Figure 6 As shown, specifically, the focusing assembly includes a lens mount 1, a lens assembly 2, a photosensitive element 3, an adjusting member 4 and a transmission member 5. The lens mount 1 is provided with a mounting position 11, the lens assembly 2 is arranged at the mounting position 11, and the optical axis a of the lens assembly 2 and the axis c of the lens mount 1 are arranged at an angle to each other, the photosensitive element 3 is located on the optical axis a of the lens assembly 2, the adjusting member 4 is fixedly connected to the photosensitive element 3 to drive the photosensitive element 3, and the transmission member 5 is located on the axis c of the lens mount 1; wherein, one of the lens mount 1 and the adjusting member 4 is provided with a first guide rail 41 parallel to the optical axis a of the lens assembly 2, and the other is provided with a first guide portion 12 slidably engaged with the first guide rail 41; one of the adjusting member 4 and the transmission member 5 is provided with a second guide rail 42 arranged at an angle to each other with the optical axis a of the lens assembly 2 and the axis c of the lens mount 1, and the other is provided with a second guide portion 51 slidably engaged with the second guide rail 42.

[0045] As mentioned above, the existing tilt focusing mechanism is only provided with a guide rail parallel to the optical axis of the lens, and drives the photosensitive element to slide along the guide rail for focusing through a flexible connecting member. However, when the field of view angle is large, this method will cause the friction between the photosensitive element and the guide rail to be large, and the component force in the direction perpendicular to the guide rail is much larger than the component force along the guide rail, which causes the photosensitive element to be unable to slide. Therefore, the tilt angle that can be met is small, the usage scenario is relatively limited, and the use of flexible elements for connection makes the focusing stability poor and the focusing accuracy low. In the focusing assembly provided in this embodiment, a first guide rail 41 and a first guide portion 12 are provided which are parallel to the optical axis a of the lens assembly 2, and a second guide rail 42 and a second guide portion 51 which are arranged at an angle to each other with respect to the optical axis a of the lens assembly 2 and the axis c of the lens holder 1. When the transmission member 5 slides along the axis c of the lens holder 1, the second guide portion 51 can slide along the second guide rail 42, thereby causing the adjustment member 4 to slide along the straight line d on which the second guide rail 42 is located. At the same time, the first guide portion 12 also slides along the first guide rail 41, thereby causing the adjustment member 4 to slide along the second guide rail 42. When the straight line d slides, it will also slide along the straight line b where the first guide rail 41 is located, thereby driving the photosensitive element 3 to slide along the optical axis a of the lens assembly 2 for focusing; this focusing method disperses the force on the two guide rails, thereby reducing the separation on each guide rail and reducing the friction between the guide rail and the guide part. Even if the field of view angle α is large, it can be adjusted, thereby expanding the scope of use of the focusing assembly; and, through the cooperation of the two sets of guide rails and the rigid transmission member 5 to drive the adjustment member 4 to slide, it can also improve the stability during focusing, thereby improving the focusing accuracy.

[0046] like Figure 4 As shown, the lens assembly 2 includes a lens body 21, a light source 22, and a filter 23. The filter 23 is disposed on the light-emitting side of the mounting position 11, and the light source 22 is disposed between the lens body 21 and the filter 23. The mounting position 11 of the lens mount 1 has a cutout parallel to the lens body 21 to avoid obstructing the view of the lens body 21.

[0047] like Figure 6 As shown, one of the lens mount 1 and the transmission member 5 is provided with a third guide rail 13 parallel to the axis c of the lens mount 1, and the other is provided with a third guide portion 52 that slidably cooperates with the third guide rail 13. The third guide rail 13 and the third guide portion 52 ensure that the transmission member 5 always slides along the axis c of the lens mount 1, preventing the sliding direction of the transmission member 5 from deviating, thereby further improving the stability of the focusing assembly during focusing.

[0048] like Figures 7 to 9As shown, the lens holder 1 is provided with a first sliding groove 14, and the transmission member 5 is slidably disposed in the first sliding groove 14; the transmission member 5 is provided with a second sliding groove 53, and the adjustment member 4 is slidably disposed in the first sliding groove 14 and the second sliding groove 53. This can reduce the overall size of the lens holder 1, the adjustment member 4, and the transmission member 5 when they slide relative to each other, thereby reducing the size of the endoscope and facilitating its use in laparoscopic surgery.

[0049] In the illustrated embodiment, a first guide portion 12 is provided on the inner wall of the first sliding groove 14, a first guide rail 41 is provided on the outer wall of the adjusting member 4, a second guide rail 42 is provided on the outer wall of the adjusting member 4, and a second guide portion 51 is provided on the inner wall of the second sliding groove 53, a third guide rail 13 is provided on the inner wall of the first sliding groove 14, and a third guide portion 52 is provided on the outer wall of the transmission member 5. Furthermore, there are two first guide rails 41, symmetrically disposed on either side of the adjusting member 4, with the first guide portion 12 corresponding to the first guide rails 41, two second guide rails 42 are symmetrically disposed on either side of the adjusting member 4, with the second guide portion 51 corresponding to the second guide rail 42, and two third guide rails 13 are symmetrically disposed on the inner walls of the lens holder 1, with the third guide portion 52 corresponding to the third guide rail 13, thereby further improving the stability of the focusing assembly during focusing. Of course, in other embodiments, the inner wall of the first sliding groove 14 may be provided with a first guide rail 41, and the outer wall of the adjusting member 4 may be provided with a first guide portion 12; the outer wall of the adjusting member 4 may be provided with a second guide portion 51, and the inner wall of the second sliding groove 53 may be provided with a second guide rail 42; the inner wall of the first sliding groove 14 may be provided with a third guide portion 52, and the outer wall of the transmission member 5 may be provided with a third guide rail 13.

[0050] Furthermore, the angle α (i.e., the field of view angle) between the axis of the lens holder 1 and the optical axis of the lens assembly 2 satisfies 0°<α<180°, thereby making the focusing assembly have a wide range of uses. Among them, 12°, 30°, 70°, and 90° are commonly used endoscope viewing angles in laparoscopic surgery. In order to improve the focusing accuracy in this embodiment, when the field of view angle α is less than or equal to 60°, it is preferred to adopt the following Figure 10 The three-track configuration shown in FIG. 1 has a low transmission ratio between the image distance and the focusing assembly, and a small pressure value between the sliding groove and the guide portion; when the field angle α is greater than 60°, it is preferred to adopt the following Figure 11 In the three-track configuration shown, the transmission ratio between the image distance and the focusing assembly is always 1, and the pressure between the sliding groove and the guide portion is small. Preferably, the angle β between the line d on which the second guide rail 42 lies and the axis c of the lens mount 1 is positively correlated with the field of view angle α.

[0051] like Figures 1 to 2As shown, the present invention also provides an endoscope, comprising an outer tube 6, a drive assembly 7, and the aforementioned focusing assembly. The focusing assembly and the drive assembly 7 are respectively arranged at both ends of the outer tube 6, and the axis of the lens holder 1 is parallel to the axis of the outer tube 6. The drive assembly 7 is used to drive the transmission member 5. Among them, the end of the outer tube 6 on which the focusing assembly is mounted has a cutout that is parallel to the end of the lens holder 1 on which the lens assembly 2 is mounted, so as to avoid blocking the line of sight of the lens assembly 2. When in use, the outer tube 6 is first inserted into the detection position at the end on which the focusing assembly is mounted. The user can then drive the transmission member 5 to slide along the axis c of the lens holder 1 through the drive assembly 7 arranged at the other end of the outer tube 6, thereby facilitating the user to focus the endoscope.

[0052] like Figure 3 As shown, the drive assembly 7 includes a hollow rotating member 71 rotatably connected to the end of the outer tube 6 away from the focusing assembly. The inner wall of the rotating member 71 is provided with an internal thread. The drive assembly 7 also includes a sliding member 72 slidably arranged in the rotating member 71. The sliding member 72 is provided with an external thread that mates with the internal thread of the rotating member 71. The sliding member 72 is connected to the transmission member 5 via a connecting rod 73. When the user rotates the rotating member 71, the internal thread on the inner wall of the rotating member 71 mates with the external thread of the sliding member 72, thereby driving the sliding member 72 to slide along the axis c of the lens mount 1. The sliding member 72 drives the transmission member 5 to slide along the axis c of the lens mount 1 via the connecting rod 73. The threaded engagement enables stepless adjustment, and the denser the thread arrangement, the higher the focusing accuracy. The connecting rod 73 is fixedly connected to the sliding member 72 and the transmission member 5 respectively by screws, adhesive, snaps, etc., as long as the tightness of the connection between the three can be guaranteed. The rotating member 71 includes a first rotating portion 711 and a second rotating portion 712 that are detachably connected by screws, snaps, etc., which facilitates the installation of the rotating member 71 on the outer tube 6 and the assembly of the sliding member 72 into the rotating member 71.

[0053] like Figures 3 and 4 As shown, the driving assembly 7 further includes a limiting member 74 disposed within the rotating member 71. The limiting member 74 includes a first limiting portion 741 sleeved on the outside of the outer tube 6. The inner wall of the rotating member 71 is provided with a first step 7111 and a second step 7121 respectively clamped at the two ends of the first limiting portion 741. In the illustrated embodiment, the first step 7111 is protruded from the inner wall of the first rotating portion 711, and the second step 7121 is protruded from the inner wall of the second rotating portion 712. When the first rotating portion 711 and the second rotating portion 712 are fixed to each other, the first step 7111 and the second step 7121 respectively clamp the first limiting portion 741 from the two ends of the first limiting portion 741. At this time, the first limiting portion 741 can limit the first rotating portion 711 and the second rotating portion 712 from sliding along the axis c of the lens mount 1.

[0054] like Figure 5As shown, the stopper 74 further includes a second stopper 742 disposed at one end of the first stopper 741. The second stopper 742 includes a first flat surface 7421, and the slider 72 includes a second flat surface 721 that slidably engages with the first flat surface 7421. In the illustrated embodiment, there are two second stoppers 742, symmetrically disposed on either side of the slider 72. The two first flat surfaces 7421 both face the slider 72, and the slider 72 is provided with a second flat surface 721 that slidably engages with the two first flat surfaces 7421 on either side. The second stoppers 742 are capable of limiting the rotation of the slider 72 about the axis c of the lens mount 1.

[0055] like Figure 4 As shown, the endoscope also includes a control assembly 8 disposed in the outer tube 6. The control assembly 8 includes a plurality of circuit boards 81, a plurality of buttons 82, a plurality of wires 83 and a bracket 84. In the illustrated embodiment, the circuit boards include a first circuit board 811 and a second circuit board 812 electrically connected by wires 83. The first circuit board 81 is disposed on the adjustment member 4 for controlling the photosensitive element 3 and the lens assembly 2. The second circuit board 812 is disposed in the outer tube 6 at one end near the drive assembly 7 and is provided with a plurality of buttons 82. A plurality of through holes 61 corresponding to the buttons 82 are provided at one end of the outer tube 6 near the drive assembly 7, so that the user can press or touch the buttons 82 through the through holes 61 to control the endoscope. The second circuit board 812 is also electrically connected to an external device through the wires 83 to send data and control signals to the external device. A wiring port for passing the wires 83 to the external device is provided on the drive assembly 7. The side of the bracket 84 away from the second circuit board 812 is arc-shaped and conforms to the inner wall of the outer tube. The side of the bracket 84 close to the second circuit board 812 conforms to the second circuit board 812 to restrict the movement of the second circuit board 812. The button 82 can have preset or customized functions, such as light source brightness, screenshot, settings, and confirmation, which are not specifically limited here.

[0056] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A focusing assembly, characterized in that: include: A lens mount (1) is provided with a mounting position (11); A lens assembly (2) is arranged at the mounting position (11), and an optical axis of the lens assembly (2) and an axis of the lens mount (1) are arranged at an angle to each other; A photosensitive element (3) is located on the optical axis of the lens assembly (2); an adjusting member (4) fixedly connected to the photosensitive element (3) to drive the photosensitive element (3); and A transmission member (5) is located on the axis of the lens holder (1); Wherein, one of the lens mount (1) and the adjusting member (4) is provided with a first guide rail (41) parallel to the optical axis of the lens assembly (2), and the other is provided with a first guide portion (12) slidably engaged with the first guide rail (41); One of the adjusting member (4) and the transmission member (5) is provided with a second guide rail (42) which is arranged at an angle to the optical axis of the lens assembly (2) and the axis of the lens mount (1), and the other is provided with a second guide portion (51) which is slidably engaged with the second guide rail (42); The mounting position (11) has a cutout parallel to the lens body (21).

2. The focusing assembly according to claim 1, wherein: One of the lens mount (1) and the transmission member (5) is provided with a third guide rail (13) parallel to the axis of the lens mount (1), and the other is provided with a third guide portion (52) slidingly engaged with the third guide rail (13).

3. The focusing assembly according to claim 2, wherein: The lens mount (1) is provided with a first sliding groove (14), and the transmission member (5) is slidably arranged in the first sliding groove (14); The transmission member (5) is provided with a second sliding groove (53), and the adjustment member (4) is slidably arranged in the second sliding groove (53).

4. The focusing assembly according to claim 3, characterized in that: The inner wall of the first sliding groove (14) is provided with the first guide portion (12), and the outer wall of the adjusting member (4) is provided with the first guide rail (41); and / or The outer wall of the adjusting member (4) is provided with the second guide rail (42), and the inner wall of the second sliding groove (53) is provided with the second guide portion (51); and / or The inner wall of the first sliding groove (14) is provided with a third guide rail (13), and the outer wall of the transmission member (5) is provided with the third guide portion (52).

5. The focusing assembly according to any one of claims 1 to 4, characterized in that: The included angle α between the axis of the lens mount (1) and the optical axis of the lens assembly (2) satisfies 0°<α<180°.

6. An endoscope, characterized in that: The lens holder (1) comprises an outer tube (6), a driving assembly (7) and a focusing assembly according to any one of claims 1 to 5, wherein the focusing assembly and the driving assembly (7) are respectively arranged at two ends of the outer tube (6), and the axis of the lens holder (1) is parallel to the axis of the outer tube (6), and the driving assembly (7) is used to drive the transmission member (5).

7. The endoscope according to claim 6, characterized in that The driving assembly (7) comprises a hollow rotating member (71) rotatably connected to an end of the outer tube (6) away from the focusing assembly, and an inner wall of the rotating member (71) is provided with an internal thread; The driving assembly (7) further comprises a sliding member (72) slidably arranged in the rotating member (71), the sliding member (72) being provided with an external thread that cooperates with the internal thread of the rotating member (71), and the sliding member (72) is connected to the transmission member (5) via a connecting rod (73).

8. The endoscope according to claim 7, wherein: The driving assembly (7) further comprises a limiting member (74) arranged in the rotating member (71), wherein the limiting member (74) comprises a first limiting portion (741) sleeved on the outside of the outer tube (6), and an inner wall of the rotating member (71) is provided with a first step (7111) and a second step (7121) respectively clamped at two ends of the first limiting portion (741).

9. The endoscope according to claim 8, characterized in that The limiting member (74) further includes a second limiting portion (742) arranged at one end of the first limiting portion (741), the second limiting portion (742) includes a first plane (7421), and the sliding member (72) includes a second plane (721) that slides with the first plane (7421).

10. The endoscope according to claim 6, wherein: The endoscope further comprises a control assembly (8) disposed within the outer tube (6).

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