Adapter for endoscope with three-stage aperture adjustment

Abstract

This invention relates to an endoscope adapter with three-stage aperture adjustment, comprising an endoscope barrel. One end of the endoscope barrel is provided with a three-stage aperture structure and a drive structure for switching between the aperture structures. The three-stage aperture structure includes: a dome-shaped base with a first-stage aperture at its center, and several pillars arranged around the first-stage aperture on the side surface of the dome-shaped base; a second-stage adjustment ring, which is a complete ring composed of at least three-lobed ring plates, with the second-stage aperture at its center. The surface of the second-stage adjustment ring has multiple arc-shaped grooves along its circumference, and each arc-shaped groove has a first straight groove at its end. This adapter, by setting a flat three-stage aperture structure, allows a compact adapter to be equipped with aperture adjustment functionality. The three-stage aperture structure and the drive switching structure are both formed by flat, thin sheets that fit together, occupying little space, being small in size, easy to operate, and stable in operation, thus improving the aperture requirements for endoscope imaging.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of endoscopes, and particularly relates to an adapter for an endoscope with three-stage aperture adjustment. BACKGROUND

[0002] An optical adapter is an important component in an endoscope camera system, and is connected to a camera handle at one end and an endoscope at the other end, and plays a crucial role in optical imaging. A traditional optical adapter, whether fixed focus or zoom, has only one diaphragm due to structural limitations. In general, optical design maximizes clarity, and the aperture is designed to be as large as possible, which results in a small depth of field of the adapter, and a phenomenon that the middle of the image is very clear and the surrounding is blurred. SUMMARY

[0003] The application aims to provide an adapter for an endoscope with three-stage aperture adjustment to solve the above problems.

[0004] The application achieves the above-mentioned purpose through the following technical solutions:

[0005] An adapter for an endoscope with three-stage aperture adjustment, comprising a lens barrel, one end of the lens barrel is provided with a three-stage aperture structure, the three-stage aperture structure comprises:

[0006] A round cover type base with a first-stage aperture in the center, the side surface of the round cover type base is provided with a plurality of stand columns around the first-stage aperture;

[0007] A second-stage adjustment ring composed of at least three ring plates to form a complete ring, the center of the ring is a second-stage aperture, the surface of the second-stage adjustment ring is provided with a plurality of arc-shaped grooves along the circumference thereof, and the end portions of the arc-shaped grooves are provided with first straight grooves;

[0008] A third-stage adjustment ring composed of at least three ring plates to form a complete ring, the center of the ring is a third-stage aperture, and the surface of the third-stage adjustment ring is provided with a plurality of second straight grooves;

[0009] The arc-shaped grooves, the first straight grooves and the second straight grooves are in sliding connection with the stand columns in a corresponding manner, and the end portion of the adapter is further provided with a driving structure for driving the second-stage adjustment ring and the third-stage adjustment ring to rotate synchronously.

[0010] As a further optimization scheme of the application, the adapter further comprises a focusing hand wheel arranged at the outer end of the lens barrel, a rear end interface arranged at one end of the focusing hand wheel, and optical filters arranged at both ends of the adapter, and the rear end interface, the focusing hand wheel and the optical filters are all conventional settings of the optical adapter.

[0011] As a further optimization scheme of the present application, the surface of each petal ring plate of the secondary adjustment ring is provided with at least two first straight grooves, the surface of each petal ring plate of the tertiary adjustment ring is provided with at least two second straight grooves, and the straight grooves on the surface of each petal ring plate are parallel to each other, the secondary adjustment ring and the tertiary adjustment ring are both composed of multiple petal ring plates, the straight grooves cooperate with the vertical columns, and the secondary adjustment ring is opened and closed in the circumferential direction along the guidance of the straight grooves and the vertical columns when the adjustment ring rotates, so that the switching of the size of the aperture is achieved.

[0012] As a further optimization scheme of the present application, the driving structure comprises a compression ring, the compression ring extends outward along the radial direction and is provided with a side rod, the secondary adjustment ring, the tertiary adjustment ring and the compression ring are sequentially stacked inside the circular cover type base, the contact surface of the secondary adjustment ring and the circular cover type base is smoothly arranged, and the contact surfaces of the secondary adjustment ring and the tertiary adjustment ring and the contact surface of the tertiary adjustment ring and the compression ring are all coarsely arranged, the switching principle is that the secondary adjustment ring and the tertiary adjustment ring are driven to rotate synchronously by the static friction, and the secondary adjustment ring and the tertiary adjustment ring are opened in sequence in the rotating process, so that the switching of the aperture is achieved.

[0013] As a further optimization scheme of the present application, the circular cover type base and the lens barrel are both provided with a notch groove extending outward along the side rod, the outer wall of the lens barrel is rotationally provided with a light adjusting hand wheel, and the inner side surface of the light adjusting hand wheel is provided with a groove corresponding to the side rod, so that the aperture switching can be achieved by rotating the light adjusting hand wheel from the outside, and the internal space occupied by the structure is small.

[0014] As a further optimization scheme of the present application, an annular compression ring is further arranged between the contact surface of the compression ring and the tertiary adjustment ring, so as to further provide the compression force between the secondary adjustment ring, the tertiary adjustment ring and the compression ring, so as to provide sufficient friction force to drive the adjustment ring to rotate.

[0015] The present application has the following beneficial effects:

[0016] The present application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0018] Figure 2 It is a sectional view of the overall structure of the present application;

[0019] Figure 3 It is a schematic diagram of the aperture structure and the driving structure of the present application;

[0020] Figure 4 This is a schematic diagram of the round cap-shaped base of the present invention;

[0021] Figure 5 This is a schematic diagram of the two-stage dimming ring of the present invention;

[0022] Figure 6 This is a schematic diagram of the three-level dimming ring of the present invention;

[0023] Figure 7 These are front and rear views of the present invention when it is switched to the second aperture.

[0024] Figure 8 These are front and rear views of the present invention when it is switched to the first aperture.

[0025] In the diagram: 1. Focusing handwheel; 2. Rear end interface; 3. Filter; 4. Lens barrel; 5. Aperture handwheel; 501. Groove; 6. Round cap-shaped base; 601. Column; 602. First aperture; 603. Notch; 7. Secondary adjustment ring; 701. Second aperture; 702. First straight groove; 703. Arc groove; 8. Tertiary adjustment ring; 801. Third aperture; 802. Second straight groove; 9. Pressure ring; 901. Side rod. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] Example 1

[0028] like Figures 1-8 As shown, an adapter for an endoscope with three-stage aperture adjustment includes a scope barrel 4, a focusing handwheel 1 disposed at the outer end of the scope barrel 4, a rear end interface 2 disposed at one end of the focusing handwheel 1, and filters 3 disposed at both ends of the adapter. One end of the scope barrel 4 is provided with a three-stage aperture structure, the three-stage aperture structure comprising:

[0029] The round-top base 6 has a first-level aperture 602 at its center, and several pillars 601 are arranged around the first-level aperture 602 on the side surface of the round-top base 6.

[0030] The secondary adjustment ring 7 is a complete ring composed of at least three-lobed ring plates. The center of the ring is the second-stage aperture 701. The surface of the secondary adjustment ring 7 has multiple arc-shaped grooves 703 along its circumference. Each end of the arc-shaped groove 703 is provided with a first straight groove 702.

[0031] The third adjustment ring 8 is composed of at least three ring plates to form a complete circular ring, and the third light ring 801 is arranged at the center of the circular ring.

[0032] The arc-shaped groove 703, the first straight groove 702 and the second straight groove 802 are in sliding connection with the stand 601 in correspondence, and the end of the adapter is further provided with a driving structure for driving the second adjustment ring 7 and the third adjustment ring 8 to rotate synchronously.

[0033] The second adjustment ring 7 and the third adjustment ring 8 are located in the interior of the circular cover type base 6 and are attached to each other, and the stand 601 passes through the arc-shaped groove 703 and the second straight groove 802.

[0034] It should be noted that the synchronous rotation of the second adjustment ring 7 and the third adjustment ring 8 can reduce the structure size, simplify the adjustment structure and be more suitable for the small size of the adapter.

[0035] In order to improve the stability of each ring plate in the circular cover type base 6, at least two first straight grooves 702 are arranged on the surface of each ring plate of the second adjustment ring 7, at least two second straight grooves 802 are arranged on the surface of each ring plate of the third adjustment ring 8, and the straight grooves on the surface of each ring plate are parallel to each other.

[0036] In order to simplify the driving mode of the second adjustment ring 7 and the third adjustment ring 8 and reduce the space occupation, the second adjustment ring 7 and the third adjustment ring 8 in the application are driven by friction, and the driving structure includes a pressing ring 9.

[0037] The driving structure is realized by the compression ring 9 only, the driving mode is simple and stable, the compression ring 9 rotates to drive the third adjustment ring 8 to rotate, the third adjustment ring 8 drives the second adjustment ring 7 to rotate synchronously, and the rotating driving force between the compression ring 9, the third adjustment ring 8 and the second adjustment ring 7 is static friction (there is radial dynamic friction in the process of opening and closing the adjustment ring, but the direction of the dynamic friction is perpendicular to the rotating tangent, so the dynamic friction has no effect on driving the adjustment ring to rotate).

[0038] In order to further provide the pressure between the second adjustment ring 7, the third adjustment ring 8 and the compression ring 9, so as to provide sufficient friction to drive the adjustment ring to rotate, an annular compression ring is further arranged between the contact surface between the compression ring 9 and the third adjustment ring 8.

[0039] The circular cover type base 6 and the lens barrel 4 are both provided with a notch groove 603 in which the side rod 901 extends outward, the outer wall of the lens barrel 4 is rotationally provided with a light adjusting ring hand wheel 5, the inner side surface of the light adjusting ring hand wheel 5 is provided with a groove 501 corresponding to the side rod 901, so as to facilitate directly controlling the rotation of the compression ring 9 from the outside.

[0040] The embodiment is specifically: the radii of the three-stage light rings of the application are sequentially arranged from large to small as follows: the first-stage light ring 602, the second-stage light ring 701 and the third-stage light ring 801, wherein the third-stage light ring 801 is separated to the outside to leak the complete second-stage light ring 701, and the second-stage light ring 701 is further separated to leak the complete first-stage light ring 602, which is the process of switching the light ring in the application.

[0041] The specific principle of switching the light ring is as follows: rotating the light adjusting ring hand wheel 5, the side rod 901 drives the compression ring 9 to rotate, the compression ring 9 drives the third adjustment ring 8 and the second adjustment ring 7 to rotate by friction, the second straight groove 802 of the third adjustment ring 8 is guided by the stand column 601 to make the third adjustment ring 8 separate to the outside, at this time, the stand column 601 slides in the arc-shaped groove 703 of the second adjustment ring 7 and does not drive the second adjustment ring 7 to rotate, when the third adjustment ring 8 is completely separated to the outside, the complete second-stage light ring 701 leaks out, and the light adjusting ring hand wheel 5 is continuously rotated, at this time, the stand column 601 enters the first straight groove 702, so that the third adjustment ring 8 and the second adjustment ring 7 continue to separate to the outside when rotating, until the third-stage light ring 801 leaks out, that is, the adjustment of the three-stage light ring is completed, and when returning to adjust, the light adjusting ring hand wheel 5 is reversed to rotate.

[0042] By arranging the flat three-stage light ring structure, the small adapter can be additionally provided with the light ring adjusting function, the three-stage light ring structure and the driving switching structure of the application are all formed by mutually adhering flat sheets, so that the space occupied is small, the volume is small, the operation is easy, the operation is stable, the light ring demand in the imaging of the endoscope is improved.

[0043] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. An adapter for an endoscope with three-level aperture adjustment, comprising an endoscope tube (4), characterized in that: One end of the lens barrel (4) is provided with a three-stage aperture structure, the three-stage aperture structure comprising: A round-top base (6) has a first-level aperture (602) at its center, and a number of pillars (601) are arranged around the first-level aperture (602) on the side surface of the round-top base (6). The secondary adjustment ring (7) is composed of at least three-lobed ring plates forming a complete ring. The center of the ring is the second-level aperture (701). The surface of the secondary adjustment ring (7) has multiple arc-shaped grooves (703) along its circumference. The ends of the arc-shaped grooves (703) are all provided with a first straight groove (702). The three-level adjustment ring (8) is a complete ring composed of at least three-lobed ring plates. The center of the ring is the third-level aperture (801). The surface of the three-level adjustment ring (8) is provided with a number of second straight grooves (802). The arc-shaped groove (703), the first straight groove (702), and the second straight groove (802) are all slidably connected to the column (601). The end of the adapter is also provided with a drive structure for driving the secondary adjustment ring (7) and the tertiary adjustment ring (8) to rotate synchronously.

2. The endoscope adapter with three-level aperture adjustment according to claim 1, characterized in that: The adapter also includes a focusing handwheel (1) disposed at the outer end of the lens barrel (4), a rear end interface (2) disposed at one end of the focusing handwheel (1), and filters (3) disposed at both ends of the adapter.

3. The endoscope adapter with three-level aperture adjustment according to claim 1, characterized in that: The surface of each petal of the secondary adjustment ring (7) has at least two first straight grooves (702), and the surface of each petal of the tertiary adjustment ring (8) has at least two second straight grooves (802), and the straight grooves on the surface of each petal are parallel to each other.

4. An adapter for an endoscope with three-level aperture adjustment according to claim 1, characterized in that: The drive structure includes a pressure ring (9), and a side rod (901) extends radially outward from the pressure ring (9). The secondary adjustment ring (7), the tertiary adjustment ring (8), and the pressure ring (9) are stacked sequentially inside the dome-shaped base (6). The contact surface between the secondary adjustment ring (7) and the dome-shaped base (6) is smoothly provided, while the contact surfaces between the secondary adjustment ring (7) and the tertiary adjustment ring (8) and between the tertiary adjustment ring (8) and the pressure ring (9) are both rough.

5. An adapter for an endoscope with three-level aperture adjustment according to claim 4, characterized in that: Both the round base (6) and the lens barrel (4) are provided with a notch (603) extending outward from the side rod (901). The outer wall of the lens barrel (4) is rotatably provided with an aperture adjustment handwheel (5). The inner surface of the aperture adjustment handwheel (5) is provided with a groove (501) corresponding to the side rod (901).

6. An adapter for an endoscope with three-level aperture adjustment according to claim 4, characterized in that: An annular clamping ring is also provided between the contact surfaces of the pressure ring (9) and the third-level adjustment ring (8).

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