TWI397730B - Focusing ring and lens barrel using same - Google Patents

Description

Focus ring and its application lens barrel assembly

The invention relates to a focusing ring and a lens barrel assembly therefor.

With the popularity of electronic devices with projection and imaging functions, the demand for lenses is increasing. In the process of use, it is often necessary to adjust the focal length of the lens by using a focus ring to achieve the best projection effect.

However, in the prior art, the conventional focus ring includes a substrate, an outer ring wall and an inner ring wall, and a plurality of bumps are disposed in the inner ring wall, and the focus ring and the lens barrel pass through the focus ring. The bumps on the inner ring wall form an interference fit with the lens barrel and are fixedly connected. This connection method is not only difficult to install but also difficult to disassemble; in the production or use, when the lens is in need of maintenance, it needs to be adjusted first. The focus ring is disassembled, and at this time, the focus ring is fixedly connected with the lens barrel, and the focus ring is easily damaged during the disassembly process, and even the lens barrel is broken, resulting in material damage and an increase in production cost.

In view of this, it is necessary to provide a detachable focus ring and a lens barrel assembly therefor.

A focus ring includes a substrate, an outer ring wall and an inner ring wall. The substrate is annular. The outer ring wall is vertically fixed on the outer edge of the substrate. The inner ring wall is sleeved in the outer ring wall and fixed on the substrate. The inner wall of the inner ring wall is respectively provided with at least one active member and at least one opening. The at least one opening extends upward in a direction perpendicular to the upper surface of the substrate to form an elastic hook.

A lens barrel assembly includes: a lens barrel and a focusing ring. The lens barrel includes a barrel, a stepped hole and a ring step. The cylindrical body has a ring-shaped column shape, and the stepped hole penetrates the cylindrical body. The outer side of the cylindrical body defines a ring step inwardly along the radial direction thereof, and the lens barrel is further provided with at least one follower, the driven The piece is disposed on the outer side of the cylinder. The focus ring is sleeved outside the lens barrel, and the focus ring comprises a substrate, an outer ring wall and an inner ring wall. The substrate is annular, and the outer ring wall is vertically fixed on the outer edge of the substrate. The inner ring wall is sleeved in the outer ring wall and fixed on the substrate. The inner wall of the inner ring wall is respectively provided with at least one active member and at least one opening, and the active member cooperates with the follower of the lens barrel, and the at least one opening is upward in a direction perpendicular to the upper surface of the substrate Extending to form an elastic hook, the elastic hook is engaged with the ring step of the lens barrel.

Compared with the prior art, the active member of the focusing ring can effectively drive the follower of the lens barrel to achieve focusing; when the lens is defective, only the elastic hook on the focusing ring can be pulled away from the lens barrel. The focus ring can be easily disassembled without material damage and increased production costs.

The invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , a focus ring 100 according to an embodiment of the present invention includes a substrate 10 , an outer ring wall 20 , and an inner ring wall 30 .

The substrate 10 is annular, and includes an upper surface 11 and a lens hole 12 formed at a center of the upper surface 11. The lens hole 12 is for allowing light to pass through.

The outer ring wall 20 is vertically fixed on the outer edge of the substrate 10 at the outer ring wall The outer wall 20 is provided with a plurality of uniformly spaced grooves 21 for increasing the frictional force when the focus ring 100 is rotated.

The inner ring wall 30 is sleeved in the outer ring wall 20 and vertically fixed on the upper surface 11 of the lens hole 12 of the substrate 10 . At least one active member 31 and at least one opening 32 are respectively disposed on the inner wall of the inner ring wall 30. In this embodiment, the active member 31 and the opening are both two, and are symmetrically formed on the inner wall of the inner ring wall 30, respectively. The active member 31 is a limit rail. An elastic hook 33 is formed in each opening 32 of the inner ring wall 30 in a direction perpendicular to the upper surface 11 of the substrate 10. The elastic hook 33 is made of an elastic material, such as elastic plastic or metal. . The elastic hook 33 extends a protrusion 331 along a radial direction of the inner ring wall 30.

Referring to FIG. 2 , an embodiment of the present invention further provides a lens barrel 40 that cooperates with the focus ring 100 . The lens barrel 40 includes a barrel body 42, a stepped hole 43 and a ring step 44. The cylinder 42 is in the shape of a ring cylinder, and the stepped hole 43 extends axially through the cylinder 42 for placing a lens and allowing light to pass therethrough. The ring step 44 is opened in the radial direction of the outer side of the cylinder 42. The lens barrel 40 is further provided with at least one follower 41. The follower 41 is a fixed post, and the follower 41 is along The axial portion of the barrel 42 is embedded in the ring step 44, and the end of the follower 41 protrudes from the outer side of the barrel 42 for mating with the active member 31 on the focus ring 100. In the present embodiment, the followers 41 corresponding to the active member 31 are two and symmetrically formed on the lens barrel 40.

Referring to FIG. 3 , when the focus ring 100 is used, the inner ring wall 30 of the focus ring 100 is sleeved outside the barrel 42 of the lens barrel 40 , and the focus ring 100 is assembled with the lens barrel 40 . . The protrusion 331 on the elastic hook 33 is engaged with the end step 44 of the end of the cylinder 42 for limiting The focus ring 100 is moved relative to the lens barrel 40 in the optical axis direction. The driving member 31 closely engages the follower 41 of the lens barrel 40. When the focus ring 100 is rotated, the driving member 31 drives the follower 41 on the lens barrel 40 to rotate. It can be understood that the active member 31 on the focus ring 100 provided by the embodiment of the present invention can be a fixed post, and the follower 41 on the lens barrel 40 can be a limit rail.

In the production process, when the lens element is found to be defective in repairing the lens element, the focus ring 100 needs to be removed first, and the elastic hook 33 which limits the degree of freedom of the optical axis direction of the focus ring 100 is elastic material, which is strong. The toughness can be removed by simply pulling the elastic hook 33 on the focus ring 100 away from the barrel 42 of the lens barrel 40. It can be understood that the active member 31 and the opening 32 of the focus ring 100 of the present invention are not limited to the embodiment, and may be plural, and a plurality of followers 41 are also required to be formed on the corresponding lens barrel 40.

The active part of the focusing ring of the invention can effectively drive the follower of the lens barrel to realize focusing; when the lens is bad, the flexible hook on the focusing ring can be arranged away from the lens barrel to facilitate the focusing ring. Disassembly will not cause material damage and increase production costs.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

Focus ring ‧‧100

Substrate ‧‧10

Upper surface ‧‧11

Lens hole ‧‧12

Outer wall ‧ ‧ ‧

Groove ‧‧21

Inner wall ‧ ‧ 30

Initiative ‧‧31

Opening ‧‧32

Flexible hook ‧‧33

Raised ‧‧ 331

1 is a perspective view of a focus ring provided by an embodiment of the present invention; FIG. 2 is a perspective view of a lens barrel according to an embodiment of the present invention; 3 is a perspective view of a lens barrel assembly according to an embodiment of the present invention.

Focus ring ‧‧100

Substrate ‧‧10

Upper surface ‧‧11

Lens hole ‧‧12

Outer wall ‧ ‧ ‧

Groove ‧‧21

Inner wall ‧ ‧ 30

Initiative ‧‧31

Opening ‧‧32

Flexible hook ‧‧33

Raised ‧‧ 331

Claims (7)

A focusing ring, comprising: a substrate, an outer ring wall and an inner ring wall, wherein the substrate is annular; the outer ring wall is vertically fixed on the outer edge of the substrate; the inner ring wall is sleeved In the outer ring wall, and fixed on the substrate; the improvement is that the inner wall of the inner ring wall is respectively provided with at least one active member and at least one opening; the at least one opening is perpendicular to the upper surface of the substrate The direction extends upward to form an elastic hook. The focus ring of claim 1, wherein the elastic hook is made of an elastic material. The focus ring of claim 2, wherein the elastic material is an elastic plastic or a metal. The focus ring of claim 1, wherein the elastic hook extends a protrusion along a radial direction of the inner ring wall. A lens barrel assembly includes: a lens barrel and a focusing ring, the lens barrel includes a barrel, a stepped hole and a ring step, the barrel is a ring-shaped column, and the stepped hole runs through the tube a ring-shaped step is formed on the outer side of the cylinder body in the radial direction thereof, and the lens barrel is further provided with at least one follower member, the follower member is disposed on the outer side surface of the cylinder body; the focus ring is sleeved on the sleeve Outside the lens barrel, the focus ring includes a substrate, an outer ring wall and an inner ring wall, the substrate is annular, and the outer ring wall is vertically fixed on the outer edge of the substrate, and the inner ring wall sleeve Provided in the outer ring wall and fixed on the substrate; the improvement is that the inner wall of the inner ring wall is respectively provided with at least one set of active members and at least one opening, and the active member and the lens barrel are driven Cooperating, the at least one opening extends upward in a direction perpendicular to the upper surface of the substrate to form an elastic hook, and the elastic hook is engaged On the ring of the lens barrel. The lens barrel assembly of claim 4, wherein the active member is a limit rail, and the follower is a fixed post. The lens barrel assembly of claim 4, wherein the active member is a fixed column, and the driven member is a limit rail.