CN204359990U - Mounting structure of medium-caliber optical lens cover - Google Patents

Abstract

The utility model relates to an installation structure of a medium-diameter optical lens cover. The halo blocking ring is riveted on the lens barrel, and three steel ball seats are evenly distributed on the circumference of the halo blocking ring, and the steel ball and spring are installed in the steel ball seat, and the rotating adjustment nut compresses the spring to make the steel ball produce a suitable tension force. The lens cover is loaded in the axial direction, and the steel balls evenly distributed at 3 points are stuck in the V-shaped groove to fix the lens cover. The utility model has the advantages of compact structure, convenient assembly and disassembly, beautiful appearance and convenient commercialization of the optical lens.

Description

A mounting structure for a medium-diameter optical lens cover

technical field

The utility model relates to an installation structure of a medium-diameter optical lens cover.

Background technique

At present, with the rapid development of related technologies in the field of optical instruments, there are more and more medium-sized optical lenses. When the caliber exceeds 250mm, due to the difficulty in manufacturing large-diameter threads, the traditional threaded lens cap cannot meet the requirements of use. The other traditional bayonet lens cap is not easy to process, has poor rigidity, and the bayonet screw is easy to wear and has low reliability, thereby reducing the usability of the entire lens.

Utility model content

In order to solve the above-mentioned technical problems in the background technology, the utility model provides a medium-diameter optical lens cover that adopts three-point steel ball tensioning and the tensioning force is adjustable.

The technical scheme that the utility model solves its technical problem adopts is:

An installation structure of a medium-caliber optical lens cover, including a lens cover, a lens barrel and a connecting assembly,

The lens cover includes a cover body and a connecting part, the cover body is adapted to the opening end of the lens barrel, the connecting part is a ring structure matching the lens barrel, and one end of the ring structure is connected to the cover body connection, the other end of the ring structure is a free end, and the connection assembly is used to connect the connection part of the lens cover with the lens barrel,

Its special features are:

The connection assembly includes a steel ball, a steel ball seat, a spring, and a spring limiter assembly. A mounting hole is arranged in the steel ball seat, one end of the mounting hole is used for installing the steel ball, and the other end of the mounting hole is used for installing the spring limiter. Position assembly, one end of the spring is against the steel ball, and the other end of the spring is against the spring limit assembly;

The head of the steel ball is tightly pressed against the inner wall of the connecting part; at the tight place, the inner wall of the connecting part is provided with a V-shaped notch that is compatible with the steel ball; the steel ball is adjusted to the lens cover by adjusting the spring and the spring limit assembly. The tension of the joint.

The number of the above-mentioned connecting components is 3, and they are evenly distributed along the circumference of the lens barrel.

The above connection assembly also includes a steel ball limiting hole arranged on the top of the steel ball seat, the diameter of the steel ball limiting hole is smaller than the diameter of the steel ball, and is used to limit the exposed height of the steel ball in the installation hole.

The above-mentioned spring limiting component is a nut, and the nut and the steel ball seat are connected by threads, and the head of the nut is provided with an adjustment groove.

Both sides of the steel ball seat are symmetrically provided with connecting arms, and the connecting assembly is installed on the L-shaped light-blocking ring nearest to the mouth of the lens barrel through the connecting arms.

The connecting arm of the steel ball seat is riveted with the L-shaped halo, and the upper end surface of the steel ball seat is flush with the highest point of the lens barrel.

A second notch opposite to the V-shaped notch is provided on the outer side of the connecting portion of the lens cover.

The shape of the above-mentioned second notch is arc-shaped.

The inner wall of the free end of the ring structure is provided with a conical surface, which facilitates the installation of the mirror cover.

Compared with the prior art, the utility model has the advantages of:

The utility model has the advantages of compact structure, convenient assembly and disassembly, beautiful appearance and convenient commercialization of the optical lens.

Description of drawings

Fig. 1 is the assembly diagram of the three-point steel ball tensioning type medium-diameter optical lens cover provided by the utility model;

Fig. 2 is the sectional view of steel ball seat;

Fig. 3 is the rotation sectional view of the three-point steel ball tensioning type medium-diameter optical lens cover provided by the utility model;

Among them, the reference signs are: 1-lens cover, 2-stop ring, 3-lens barrel, 4-steel ball, 5-steel ball seat, 6-spring, 7-adjusting nut, 8-second gap, 9- Connecting arm, 10-cone face.

Detailed ways

The utility model installs three steel ball seats on the lens barrel of the optical lens, the steel ball seats are evenly distributed on the same circumferential surface along the circumferential direction, each steel ball seat is equipped with a steel ball, and the lens cover with a V-shaped groove is installed When inserting, the three steel balls are stuck in the V-shaped groove, and the tension force of the steel balls on the lens cover is adjusted by the spring in the steel ball seat and the adjusting nut, so that the lens cover is fixed reliably and can be easily disassembled.

The preferred embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

In Fig. 1, the light-blocking ring 2 is riveted on the lens barrel 3, and three steel ball seats 5 are riveted on the light-blocking ring 2 evenly, and the upper end surface of the steel ball seat is flush with the highest point of the lens barrel. Steel ball 4 is contained in steel ball seat 5, and the limit hole hole of steel ball seat 5 upper ends will be less than steel ball diameter, and steel ball is unlikely to protrude and stretches out suitable. The spring 6 is contained in the steel ball seat 5, and the tension of the steel ball 4 is adjusted by adjusting the compression amount of the spring 6 by rotating the adjusting nut 7. The lens cover 1 is made of aluminum alloy and has a V-shaped ring groove inside. The surface of the V-shaped groove is plated with nickel to improve its wear resistance. The lens cover 1 is loaded in the axial direction, the spring 6 is compressed and the steel ball 4 is stuck in the V-shaped groove to fix it. Rotate the adjustment nut 7 to adjust the compression amount of the spring 6 so that the tightening force is suitable and the lens cover 1 is disassembled comfortably. After adjustment, point silicone rubber on the end face of the adjustment nut 7 to prevent loosening.

Both sides of the steel ball seat of the utility model are symmetrically provided with connecting arms 9, and the connecting assembly is installed on the nearest L-shaped light blocking ring from the lens barrel mouth through the connecting arms, and the connecting arms are riveted with the L-shaped light blocking ring.

In order to increase the elasticity of the connection part, the outside of the connection part of the lens cover of the present invention is also provided with a second notch 8 opposite to the V-shaped notch. In order to avoid the vulnerable problem of the connection part, the shape of the second notch can be set to Oval.

Further, in order to facilitate the installation of the lens cover and the lens barrel, the utility model cuts a conical surface 10 on the inner wall of the free end of the ring structure, so that the lens cover can be introduced.

Claims (9)

1. A mounting structure for a medium-caliber optical lens cover, comprising a lens cover, a lens barrel and a connecting assembly, The lens cover includes a cover body and a connecting part, the cover body is adapted to the opening end of the lens barrel, the connecting part is a ring structure matching the lens barrel, and one end of the ring structure is connected to the cover body connection, the other end of the ring structure is a free end, and the connection assembly is used to connect the connection part of the lens cover with the lens barrel, It is characterized by: The connection assembly includes a steel ball, a steel ball seat, a spring, and a spring limiter assembly. A mounting hole is arranged in the steel ball seat, one end of the mounting hole is used for installing the steel ball, and the other end of the mounting hole is used for installing the spring limiter. Position assembly, one end of the spring is against the steel ball, and the other end of the spring is against the spring limit assembly; The head of the steel ball is tightly pressed against the inner wall of the connecting part; at the tight place, the inner wall of the connecting part is provided with a V-shaped notch that is compatible with the steel ball; the steel ball is adjusted to the lens cover by adjusting the spring and the spring limit assembly. The tension of the joint. 2. the mounting structure of the middle aperture optical lens cover according to claim 1, is characterized in that: The number of the connecting components is 3, and they are evenly distributed along the circumference of the lens barrel. 3. the mounting structure of the middle aperture optical lens cover according to claim 1, is characterized in that: The connection assembly also includes a steel ball limiting hole arranged on the top of the steel ball seat, the diameter of the steel ball limiting hole is smaller than the diameter of the steel ball, and is used to limit the exposed height of the steel ball in the installation hole. 4. according to the mounting structure of claim 1 or 2 or 3 described medium aperture optical lens caps, it is characterized in that: The spring limiting component is a nut, and the nut is threadedly connected to the steel ball seat, and the head of the nut is provided with an adjustment groove. 5. the mounting structure of the middle aperture optical lens cover according to claim 4, is characterized in that: Both sides of the steel ball seat are symmetrically provided with connecting arms, and the connecting assembly is installed on the L-shaped light blocking ring closest to the lens barrel mouth through the connecting arms. 6. The installation structure of the medium-caliber optical lens cap according to claim 5, characterized in that: the connecting arm of the steel ball seat is riveted with the L-shaped light blocking ring, and the upper end surface of the steel ball seat is flush with the highest point of the lens barrel . 7 . The installation structure of the medium aperture optical lens cap according to claim 6 , wherein a second notch opposite to the V-shaped notch is provided on the outside of the connecting portion of the lens cap. 8 . 8 . The installation structure of the medium aperture optical lens cover according to claim 7 , wherein the shape of the second notch is an arc. 9 . The mounting structure of the medium aperture optical lens cap according to claim 8 , wherein the inner wall of the free end of the annular structure is provided with a conical surface. 10 .