Lens pressing ring tightening tool for preventing O-shaped ring from running out and use method

Abstract

The invention discloses a lens pressing ring tightening tool capable of preventing an O-shaped ring from running out and a using method, the tightening tool comprises a tightening sleeve shell used for being matched with the end face of a pressing ring to provide rotating torque and an O-shaped ring guide column arranged in the tightening sleeve shell and used for limiting the O-shaped ring in a lens, and the lower end of the O-shaped ring guide column is located on the inner circumference of the O-shaped ring. The shape of the lower end face of the O-shaped ring guide column is matched with the shape of the end face of the lens at the position where the O-shaped ring is located; the upper end face of the O-ring guide column is provided with an elastic pressing mechanism used for providing pressure for the O-ring guide column when the pressing ring is tightened through the tightening sleeve shell. According to the pressing ring tightening tool, the O-shaped ring guide column is arranged, radial supporting can be provided for the O-shaped ring in the process that the O-shaped ring is pressed by the pressing ring, and therefore the pressing ring is prevented from running out of the lower portion of the pressing ring, the O-shaped ring assembling success rate and the O-shaped ring installing quality are improved, and the sealing effect of a lens is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of lens assembly, and particularly relates to a lens retaining ring tightening tool for preventing an O-ring from running out and a using method thereof. Background Art

[0002] An O-ring is an annular rubber seal with a circular cross-section, which has the characteristics of simple structure, good sealing performance, convenient installation, etc. It is often used in static or dynamic sealing occasions, can effectively prevent liquid or gas leakage, and is widely used in the fields of machinery, automobiles, aviation, etc.

[0003] During the optical lens assembly process, an O-ring needs to be set at the end of the lens for sealing to achieve the protection of the inside of the lens; the O-ring is tightly fixed by a retaining ring that is threadedly engaged with the lens; the patent application with the patent publication number CN210155380U discloses an optical lens retaining ring fastening device. By connecting the above-mentioned jig connector to the mounting seat, a torque rotating jig can be connected to this jig connector, and the rotation torque of the optical lens retaining ring fastening device can be controlled by this torque rotating jig; although the above-mentioned device can control the rotation torque, in specific use, since only the lower end point of the retaining ring fastening rod contacts the retaining ring and tightens the retaining ring, during the rotation of the retaining ring, due to the screwing of the retaining ring thread, the pressure exerted by the retaining ring on the O-ring is uneven, causing the O-ring to deform and shift, and the original regular shape is damaged, and then it is extremely easy to run out of the installation position, ultimately resulting in seal failure or the need for re-assembly, seriously affecting the sealing performance and service quality of the lens. Summary of the Invention

[0004] Technical Objective: Aiming at the deficiencies of the existing lens O-ring assembly tooling, the present invention discloses a lens retaining ring tightening tool for preventing an O-ring from running out and a using method thereof.

[0005] Technical Solution: To achieve the above technical objective, the present invention adopts the following technical solution: A lens retaining ring tightening tool for preventing an O-ring from running out includes a tightening sleeve shell for cooperating with the end face of the retaining ring to provide a rotational torque, and an O-ring guiding column disposed inside the tightening sleeve shell for limiting the O-ring inside the lens. The lower end of the O-ring guiding column is located inside the inner circumference of the O-ring, providing a radial support for the O-ring, and the shape of the lower end face of the O-ring guiding column matches the shape of the lens end face where the O-ring is located; an elastic pressing mechanism is provided on the upper end face of the O-ring guiding column for providing pressure to the O-ring guiding column when the retaining ring is tightened through the tightening sleeve shell.

[0006] Preferably, the O-ring guide post of the present invention is concentrically arranged inside the tightening sleeve. The upper part of the O-ring guide post has a clearance fit with the tightening sleeve. The elastic pressing mechanism is arranged between the upper end face of the O-ring guide post and the inner wall of the tightening sleeve, and the axial movement of the tightening sleeve during the process of tightening the retaining ring provides a gradually increasing pressure for the O-ring guide post.

[0007] Preferably, the elastic pressing mechanism of the present invention includes an elastic element capable of expanding and contracting along the axis direction of the tightening sleeve. One end of the elastic element abuts against the upper end face of the O-ring guide post, and the other end abuts against the inner wall of the tightening sleeve. Before the tightening sleeve is used to tighten the retaining ring, the elastic element is in a natural state or a pre-compressed state.

[0008] Preferably, a positioning screw post for guiding and positioning the expansion and contraction of the elastic element is coaxially connected to the upper end of the O-ring guide post of the present invention. The elastic element is sleeved on the outer periphery of the positioning screw post. The lower end of the positioning screw post is in threaded cooperation with the O-ring guide post. The upper part of the positioning screw post passes through the tightening sleeve, and the tightening sleeve is in sliding cooperation with the positioning screw post. A limiting mechanism for axially limiting the tightening sleeve is arranged at the upper end of the positioning screw post.

[0009] Preferably, the limiting mechanism of the present invention includes a fixing pad with a diameter larger than that of the O-ring guide post and a fixing screw passing through the fixing pad and in threaded cooperation with the positioning screw post. The fixing pad is pressed against the end of the positioning screw post by the fixing screw.

[0010] Preferably, a positioning protrusion cooperating with the retaining ring is arranged on the lower end face of the tightening sleeve of the present invention. The positioning protrusions are symmetrically arranged about the center of the tightening sleeve. A groove cooperating with the positioning protrusion is arranged on the retaining ring.

[0011] The present invention discloses a method of using a lens retaining ring tightening tool for preventing the O-ring from running out. The O-ring and the spacer are sequentially placed into the lens according to the installation positions. After the tightening tool is assembled, the retaining ring is placed into the end of the O-ring guide post and cooperates with the positioning protrusion at the end of the tightening sleeve for torque transmission. The tightening tool is inserted into the lens from the end of the lens. The end of the O-ring guide post abuts against the lens end face at the position where the O-ring is located in the lens. The O-ring is located on the side wall of the O-ring guide post. The tightening sleeve is rotated to screw the retaining ring into the lens until the retaining ring abuts against the spacer, and the spacer and the O-ring are pressed and fixed in the lens. Then the tightening tool is taken out of the lens.

[0012] Preferably, the process of screwing the pressing ring into the lens housing by the tightening sleeve of the present invention includes: applying an axial pressure to the tightening sleeve, contacting the tightening sleeve and the pressing ring at the end with the threaded area of the lens, rotating the tightening sleeve, the pressing ring is screwed into the threaded area of the lens, and the tightening sleeve moves axially along the positioning screw column as the pressing ring is screwed in. During the movement of the tightening sleeve, the upper end of the elastic element is compressed downward by the tightening sleeve, and the lower end abuts against the upper end face of the O-ring guide column, providing a downward pressure on the O-ring guide column to keep the position of the O-ring guide column stable in the lens; after the pressing ring moves to the spacer position, continue to rotate the pressing ring downward to press the spacer and the O-ring tightly. During the pressing process, the O-ring guide column provides radial support for the pressing ring to keep the pressing ring aligned with the axis of the O-ring guide column, providing uniform pressure on the O-ring, and restricting the radial movement of the O-ring through the O-ring guide column, so that the O-ring is pressed tightly under the pressing ring.

[0013] Preferably, when disassembling the tightening tooling of the present invention, loosen the tightening sleeve, the elastic force of the elastic element drives the tightening sleeve to move upward, the lower end of the tightening sleeve is separated from the pressing ring until the tightening sleeve moves to the fixed pad position and is blocked by the fixed pad; then the tightening tooling is taken out of the lens as a whole.

[0014] Beneficial effects: A lens pressing ring tightening tooling and a using method for preventing an O-ring from running out disclosed by the present invention have the following beneficial effects: 1. The pressing ring tightening tooling of the present invention is provided with an O-ring guide column, which can provide radial support for the O-ring during the process of pressing the O-ring by the pressing ring, thereby preventing the O-ring from running out from under the pressing ring, improving the success rate of O-ring assembly and the installation quality of the O-ring, and ensuring the sealing effect of the lens.

[0015] 2. The lower end of the O-ring guide column of the present invention matches the shape of the lens, and can provide stable support through the lens to keep the position of the O-ring guide column stable in the lens. With the provided elastic pressing mechanism, the radial limiting effect of the O-ring guide column on the O-ring can be ensured.

[0016] 3. The O-ring guide column of the present invention is concentrically arranged with the tightening sleeve. When tightening the pressing ring through the tightening sleeve, the pressing ring moves along the O-ring guide column, and the O-ring guide column plays a role in limiting the pressing ring, which can prevent the pressing ring from being skewed, so that during the tightening process, the pressing force applied by the pressing ring to the O-ring is more uniform.

[0017] 4. The elastic element of the present invention abuts between the upper end surface of the O-ring guide post and the inner wall of the tightening sleeve housing. During the process of tightening the retaining ring, the movement of the tightening sleeve housing drives the compression of the elastic element to provide pressure. There is no need to set up a separate driving structure. It directly utilizes the axial movement of the tightening sleeve housing during the process of tightening the retaining ring to achieve, simplifies the structure of the tooling, facilitates assembly, and reduces the operation difficulty of the tooling. At the same time, the existence of the elastic element can also provide buffering for the movement of the tightening sleeve housing, ensuring that the process of tightening the retaining ring is more stable.

[0018] 5. The present invention is provided with a positioning screw post above the O-ring guide post. The positioning screw post is coaxially arranged with the O-ring guide post. By guiding and positioning the expansion and contraction of the elastic element through the positioning screw post, it can ensure that the pressure of the elastic element is consistent with the axis direction of the O-ring guide post and is evenly transmitted to the O-ring guide post, ensuring the stability of the position of the O-ring guide post. At the same time, the concentricity of the assembly of the tightening sleeve housing and the O-ring guide post can be ensured through the positioning screw post, thereby improving the limiting effect on the O-ring.

[0019] 6. The present invention is provided with a limiting mechanism at the end of the positioning screw post. By using the fixing pad to block the tightening sleeve housing, the continuous upward movement of the tightening sleeve housing is restricted, which can prevent the tightening sleeve housing from detaching from the tooling, thereby facilitating the overall picking and placing of the tooling.

[0020] 7. The tightening sleeve housing and the retaining ring of the present invention are matched through positioning protrusions and grooves, which is convenient for torque transmission and can prevent slipping, affecting the assembly process of the retaining ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0022] Figure 1 It is an exploded view of the retaining ring tightening tooling of the present invention; Figure 2 It is a state diagram of the retaining ring tightening tooling of the present invention cooperating with the lens to tighten the retaining ring; Figure 3 It is a cross-sectional view of the structure of the tightening sleeve housing of the present invention; Among them, 1 - retaining ring, 2 - tightening sleeve housing, 3 - O-ring, 4 - O-ring guide post, 5 - elastic element, 6 - positioning screw post, 7 - fixing pad, 8 - fixing screw, 9 - positioning protrusion, 10 - spacer ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Reference will now be made in detail to the embodiments of the present disclosure, one or more examples of which are set forth below. Each embodiment and example is provided by way of explanation of the apparatus, composition, and materials of the present disclosure, and not by way of limitation. On the contrary, the following description provides a convenient illustration for implementing the exemplary embodiments of the present disclosure. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the teachings of the present disclosure without departing from the scope or spirit of the present disclosure.

[0024] As Figures 1 - 3 shown, the present invention discloses a lens retaining ring tightening tool for preventing an O-ring from running out, including a tightening sleeve housing 2 for cooperating with the end face of the retaining ring 1 to provide a rotational torque, and an O-ring guiding post 4 disposed within the tightening sleeve housing 2 for limiting the O-ring 3 within the lens. The lower end of the O-ring guiding post 4 is located within the inner circumference of the O-ring 3 to provide a radial support for the O-ring 3. The shape of the lower end face of the O-ring guiding post 4 matches the shape of the lens end face where the O-ring is located; an elastic pressing mechanism is provided on the upper end face of the O-ring guiding post 4 to provide pressure for the O-ring guiding post 4 when the retaining ring is tightened through the tightening sleeve housing.

[0025] During the process of tightening the retaining ring, the O-ring guiding post 4 of the present invention maintains a stable relative position with the lens through the pressure provided by the elastic pressing mechanism, thereby ensuring the limiting effect on the O-ring 3 and always keeping the O-ring 3 below the retaining ring 1, facilitating the retaining ring 1 to apply pressure for tightening. At the same time, in a conventional lens sealing assembly structure, a spacer ring 10 is provided between the retaining ring 1 and the O-ring. The spacer ring 10 bears the deformation caused by the pressure of the retaining ring 1 and uniformly presses on the surface of the O-ring, thereby ensuring the sealing effect of the O-ring on the lens.

[0026] For the convenience of operating the tightening tool, as Figure 2 shown, the O-ring guiding post 4 of the present invention is concentrically disposed within the tightening sleeve housing 2. The upper part of the O-ring guiding post 4 has a clearance fit with the tightening sleeve housing 2. The elastic pressing mechanism is disposed between the upper end face of the O-ring guiding post 4 and the inner wall of the tightening sleeve housing 2 to provide a gradually increasing pressure for the O-ring guiding post 4 through the axial movement of the tightening sleeve housing 2 during the process of tightening the retaining ring; the elastic pressing mechanism includes an elastic element 5 having the ability to expand and contract along the axis direction of the tightening sleeve housing 2, preferably a spring. One end of the elastic element 5 abuts against the upper end face of the O-ring guiding post 4, and the other end abuts against the inner wall of the tightening sleeve housing 2. Those skilled in the art can, by setting the relative dimensions of the elastic element 5 and the positioning screw post 6, make the elastic element 5 in a natural state or a pre-compressed state before the retaining ring is tightened by the tightening sleeve housing 2.

[0027] When tightening the retaining ring, it is only necessary to control the movement of the tightening sleeve 2 to tighten the retaining ring 1. During this process, pressure is applied to the elastic element 5 through the tightening sleeve 2, pressing the O-ring guide post 4 against the lens. There is no need to separately apply power through an elastic pressing mechanism for operation, thereby reducing the operation difficulty of the tooling. The tightening operation can be carried out by a single person, or the tightening sleeve 2 can be connected to the driving end of the manipulator, and the rotation and axial movement of the tightening sleeve 2 can be directly realized through the manipulator. Whether it is rotational drive or axial movement, it is a conventional multi-degree-of-freedom movement method, and it can be directly realized by using mature driving equipment in the existing technology. For example, the tightening sleeve 2 is directly rotated by a motor, and the axial movement drive of the whole motor and the tightening sleeve 2 is realized by using a cylinder drive or an electric cylinder structure, etc., so as to achieve the purpose of installing the retaining ring by tightening with the tightening sleeve.

[0028] As Figure 1 and Figure 2 shown, a positioning screw post 6 for guiding and positioning the expansion and contraction of the elastic element 5 is coaxially connected to the upper end of the O-ring guide post 4 of the present invention. The elastic element 5 is sleeved on the outer periphery of the positioning screw post 6. The lower end of the positioning screw post 6 is in threaded cooperation with the O-ring guide post 4. The upper part of the positioning screw post 6 passes through the tightening sleeve 2, and the tightening sleeve 2 is in sliding cooperation with the positioning screw post 6. A limiting mechanism for axially limiting the tightening sleeve 2 is provided at the upper end of the positioning screw post 6; by guiding and limiting the elastic element 5 through the positioning screw post 6, the elastic force direction can always be along the axis direction of the O-ring guide post 4, and the pressure application position is at the center of the O-ring guide post, so as to keep the forces at each position where the O-ring guide post contacts the lens uniform; at the same time, the lower end of the positioning screw post 6 is threadedly connected to the O-ring guide post 4, and the upper end passes through the tightening sleeve 2, and the concentric assembly between the tightening sleeve 2 and the O-ring guide post 4 can be realized through the positioning screw post 6, thus facilitating the assembly of the tooling.

[0029] The limiting mechanism of the present invention includes a fixed pad 7 with a diameter larger than that of the O-ring guide post 4 and a fixing screw 8 passing through the fixed pad 7 and in threaded cooperation with the positioning screw post 6. The fixed pad 7 is pressed against the end of the positioning screw post 6 through the fixing screw 8. Below the fixed pad 7, the tightening sleeve 2 can move up and down within the compression stroke range of the elastic element 5, and the reaction force generated when the elastic element 5 is compressed can buffer the movement of the tightening sleeve 2, so as to keep the movement of the tightening sleeve 2 stable during the process of tightening the retaining ring. After the retaining ring 1 is tightened and installed in place, the elastic force of the elastic element 5 makes the tightening sleeve 2 automatically reset, realizing the separation from the retaining ring 1.

[0030] To facilitate the transmission of torque, a positioning protrusion 9 that mates with the retaining ring 1 is provided on the lower end surface of the tightening sleeve housing 2 of the present invention. The positioning protrusions 9 are arranged symmetrically about the center of the tightening sleeve housing 2, and grooves that mate with the positioning protrusions 9 are provided on the retaining ring 1. In addition, the rotation of the retaining ring 1 can be driven by changing the roughness of the contact surface between the tightening sleeve housing 2 and the retaining ring 1. This method is applicable to occasions where the torque requirement is not high and can ensure the integrity of the retaining ring.

[0031] The present invention also discloses a method of using a lens retaining ring tightening tooling based on the above-mentioned prevention of the O-ring from running out. The O-ring and the spacer are sequentially placed into the lens according to the installation positions. After the tightening tooling is assembled, the retaining ring is placed from the end of the O-ring guide post and mates with the positioning protrusion at the end of the tightening sleeve housing for torque transmission. The entire tightening tooling is inserted into the lens from the lens end. The end of the O-ring guide post abuts against the position where the O-ring is located in the lens. The O-ring is located on the side wall of the O-ring guide post. Rotate the tightening sleeve housing to screw the retaining ring into the lens housing. Apply an axial pressure to the tightening sleeve housing. The tightening sleeve housing and the retaining ring at the end come into contact with the threaded area of the lens housing.

[0032] Rotate the tightening sleeve housing. The retaining ring is screwed into the lens housing along the threaded area. The tightening sleeve housing moves axially along the positioning screw post as the retaining ring is screwed in. During the movement of the tightening sleeve housing, the upper end of the elastic element is compressed downward by the tightening sleeve housing, and the lower end abuts against the upper end surface of the O-ring guide post, providing a downward pressure on the O-ring guide post to maintain the stability of the position of the O-ring guide post in the lens. After the retaining ring moves to the position of the spacer, continue to rotate the retaining ring downward to compress the spacer and the O-ring. During the compression process, the O-ring guide post provides radial support for the retaining ring to keep the retaining ring aligned with the axis of the O-ring guide post, providing uniform pressure on the O-ring, and restricting the radial movement of the O-ring through the O-ring guide post, so that the O-ring is pressed under the retaining ring, fixing the spacer and the O-ring in the lens. Then, remove the tightening tooling from the lens. When disassembling the tightening tooling, loosen the tightening sleeve housing. The elastic force of the elastic element drives the tightening sleeve housing to move upward. The lower end of the tightening sleeve housing disengages from the retaining ring until the tightening sleeve housing moves to the position of the fixing pad and is blocked by the fixing pad. Then, remove the entire tightening tooling from the lens.

[0033] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A lens retaining ring tightening tool for preventing the O-ring from running out, characterized in that, It includes a tightening sleeve housing (2) for providing rotational torque in cooperation with the end face of the retainer ring (1), and an O-ring guide post (4) disposed within the tightening sleeve housing (2) for limiting the O-ring (3) within the lens. The lower end of the O-ring guide post (4) is located within the inner circumference of the O-ring (3) to provide radial support to the O-ring (3). The shape of the lower end face of the O-ring guide post (4) matches the shape of the lens end face where the O-ring is located. An elastic pressing mechanism is provided on the upper end face of the O-ring guide post (4) to provide pressure to the O-ring guide post (4) when tightening the retainer ring through the tightening sleeve housing.

2. The lens retaining ring tightening tool for preventing the O-ring from running out according to claim 1, characterized in that, The O-ring guide post (4) is concentrically disposed within the tightening sleeve housing (2). The upper part of the O-ring guide post (4) has a clearance fit with the tightening sleeve housing (2). The elastic pressing mechanism is disposed between the upper end face of the O-ring guide post (4) and the inner wall of the tightening sleeve housing (2), and provides a gradually increasing pressure to the O-ring guide post (4) through the axial movement of the tightening sleeve housing (2) during the retainer ring tightening process.

3. The lens retaining ring tightening tool for preventing the O-ring from running out according to claim 2, characterized in that, The elastic pressing mechanism includes an elastic element (5) capable of expanding and contracting along the axis direction of the tightening sleeve housing (2). One end of the elastic element (5) abuts against the upper end face of the O-ring guide post (4), and the other end abuts against the inner wall of the tightening sleeve housing (2). Before tightening the retainer ring with the tightening sleeve housing (2), the elastic element (5) is in a natural state or a pre-compressed state.

4. A lens retaining ring tightening tool for preventing an O-ring from running out according to claim 3, characterized in that, A positioning screw post (6) for guiding and positioning the expansion and contraction of the elastic element (5) is coaxially connected to the upper end of the O-ring guide post (4). The elastic element (5) is sleeved on the outer circumference of the positioning screw post (6). The lower end of the positioning screw post (6) is in threaded cooperation with the O-ring guide post (4). The upper part of the positioning screw post (6) passes through the tightening sleeve housing (2), and the tightening sleeve housing (2) has a sliding fit with the positioning screw post (6). A limiting mechanism for axially limiting the tightening sleeve housing (2) is provided at the upper end of the positioning screw post (6).

5. A lens retaining ring tightening tool for preventing an O-ring from running out according to claim 4, characterized in that, The limiting mechanism includes a fixing pad (7) with a diameter larger than that of the O-ring guide post (4) and a fixing screw (8) passing through the fixing pad (7) and in threaded cooperation with the positioning screw post (6). The fixing pad (7) is pressed against the end of the positioning screw post (6) through the fixing screw (8).

6. The lens retaining ring tightening tool for preventing the O-ring from running out according to claim 4, characterized in that, A positioning protrusion (9) cooperating with the retainer ring (1) is provided on the lower end face of the tightening sleeve housing (2). The positioning protrusions (9) are symmetrically arranged about the center of the tightening sleeve housing (2). Grooves cooperating with the positioning protrusions (9) are provided on the retainer ring (1).

7. The usage method of a lens retaining ring tightening tool for preventing an O-ring from running out according to any one of claims 1-6, characterized in that, Place the O-ring and spacer into the lens in sequence according to the installation positions. After the tightening tooling is assembled, the retainer ring is placed from the end of the O-ring guide post and cooperates with the positioning protrusion at the end of the tightening sleeve housing for torque transmission. The tightening tooling is inserted from the end of the lens. The end of the O-ring guide post abuts against the lens end face at the position where the O-ring is located within the lens. The O-ring is located on the side wall of the O-ring guide post. Rotate the tightening sleeve housing to screw the retainer ring into the lens until the retainer ring abuts against the spacer, tightly fixing the spacer and the O-ring within the lens, and then take out the tightening tooling from the lens.

8. The usage method of a lens retaining ring tightening tool for preventing the O-ring from running out according to claim 7, characterized in that, The process of screwing the pressing ring into the lens housing by the tightening sleeve includes: applying an axial pressure to the tightening sleeve, bringing the tightening sleeve and the pressing ring at the end into contact with the threaded area of the lens, rotating the tightening sleeve, and screwing the pressing ring along the threaded area of the lens. As the pressing ring is screwed in, the tightening sleeve moves axially along the positioning screw column. During the movement of the tightening sleeve, the upper end of the elastic element is compressed downward by the tightening sleeve, and the lower end abuts against the upper end face of the O-ring guide post, providing a downward pressure on the O-ring guide post to keep the position of the O-ring guide post stable within the lens. After the pressing ring moves to the spacer position, continue to rotate the pressing ring downward to press the spacer and the O-ring tightly. During the pressing process, the O-ring guide post provides radial support for the pressing ring to keep the pressing ring axially aligned with the O-ring guide post, providing uniform pressure on the O-ring, and restricting the radial movement of the O-ring through the O-ring guide post, so that the O-ring is pressed tightly below the pressing ring.

9. The usage method of a lens retaining ring tightening tool for preventing an O-ring from running out according to claim 7, characterized in that, When disassembling the tightening tooling, loosen the tightening sleeve, and the elastic force of the elastic element drives the tightening sleeve to move upward. The lower end of the tightening sleeve disengages from the pressing ring until the tightening sleeve moves to the fixed pad position and is blocked by the fixed pad. Then, remove the tightening tooling from the lens as a whole.

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