JP2001033680A - Lens-barrel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of assembling processes, and reduce the assembling cost, even in the case where a focus lock switch, an AF start switch, a vibration control switch and the like provided with water-proofness on the outer circumferential face of a fixed outer tube of a lens-barrel are arranged in plural places. SOLUTION: A switch fixing member 16 to which a flexible printed wiring board 15 having four electric switches 14 mounted to be located inside four hole parts 11a provided along a circumferential direction of a fixed outer tube 11 is bonded is tightened to a flange part 11b by a screw 17, a button type operation part 12a is integrally formed in a ring-shaped elastic member 12 attached along the circumferential direction with the hole parts 11a to correspond to positions where the hole parts 11a exist, protrusions 11b engaged with the hole parts 11a are provided integrally in an inside diameter part of the elastic member 12, and mutually opposed projected parts 12c projected to more outside than the button type operation part 12a are provided integrally in an outer circumferential face thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel of an optical apparatus such as a camera provided with a waterproof operating member.

[0002]

2. Description of the Related Art Conventionally, cameras equipped with an AF mechanism for automatically performing focus adjustment and the like in cameras and the like have been mainstream. For example, a motor is built in a lens barrel to drive a lens system for focus adjustment. To focus. By the way, in recent years, a large number of lenses having various functions have been commercialized, such as a lens having a large lens barrel such as a large-aperture telephoto lens, in order to improve operability at the time of shooting. I have. For example, a lens such as a large-aperture telephoto lens has a shallow depth of field. Because it may not be able to be cut, it is used like shooting with a pin. For this reason, there is a lens in which a focus lock switch is provided on the lens so that pin shooting can be performed even during AF shooting. Also, for example, in order to omit the half-press operation of the camera (the AF start operation by the release button of the camera), the AF start switch is arranged near the left hand position when the lens is held, and the release button of the camera is used to release the shutter. It is also considered to be only.

[0003] Recently, a lens having an image stabilizing function for automatically performing camera shake correction has come out. For example, by operating an image stabilizing switch provided in a lens barrel,
In some cases, a lens system for shake correction is driven to perform shake correction. These operation switches make it easier for the photographer to hold the camera in either the vertical position or the horizontal position, and to operate easily when holding any lens in hand-held shooting or shooting using a monopod or tripod. Conventionally, for example, as shown in FIG. 4, button-type operation switches (operation members) 2 are arranged at four equally-divided positions along the outer peripheral surface of the fixed outer cylinder 1.

[0004]

However, when the above-mentioned focus lock switch, AF start switch and anti-vibration switch are arranged at a plurality of positions on the outer peripheral surface of the fixed outer cylinder, conventionally, as shown in FIGS. 4 and 5, for example. The button-type operation member 2, the electric switch 4, the switch fixing member 6, and the cover member 8 having the same shape are respectively used, and the switch fixing member 6 to which the electric switch 4 is fixed is fixed to the outer diameter of the fixed inner cylinder 3. After fixing with a screw 7 to a flange portion 1b provided on the inner peripheral side of the fixed outer cylinder 1 on the side, a hole 1a provided in the fixed outer cylinder 1 and an operation button are provided to make the operation portion waterproof. In order not to expose the gap to the outside, the operating member 2 must be fixed to the fixed outer cylinder 1 by one screw 9 so as to press the operating member 2 with the cover member 8. The process is increased, there is a drawback that the assembly cost is increased.

The present invention eliminates the above-mentioned drawbacks of the prior art, and can be used even when a plurality of waterproof focus lock switches, AF start switches, anti-vibration switches, and the like are arranged on the outer peripheral surface of the fixing member of the lens barrel. The object of the present invention is to provide a lens barrel capable of reducing the number of assembling steps and suppressing the assembling cost.

[0006]

In order to achieve the above-mentioned object, the present invention is to integrally form a plurality of switch operating members provided in a fixed outer cylinder with a ring-shaped elastic member fixed to an outer peripheral surface thereof. It was done.

[0007]

According to the present invention, there is provided a lens barrel capable of automatic focusing and manual focusing, wherein the lens barrel is fixedly provided on a fixed outer cylinder and an outer peripheral surface of the fixed outer cylinder. A button-shaped operating member having a waterproof property, having a ring-shaped elastic member and at least one button-shaped operating member, wherein the button-shaped operating member and the ring-shaped elastic member are integrally formed. The assemblability is significantly improved, and the assembly cost can be reduced. The present invention according to claim 2 is characterized in that at least one convex portion is provided on one of the inner peripheral surface of the ring-shaped elastic member and the outer peripheral surface of the fixed outer cylinder, and a concave portion or a hole corresponding to the convex portion is provided on the other. By forming a portion and fitting the convex portion and the concave portion in at least one place, the position of the operating member of the ring-shaped elastic member can be reliably and easily adjusted to the position of the hole of the fixed outer cylinder. it can. According to a third aspect of the present invention, there is provided an outer peripheral surface of the ring-shaped elastic member, wherein a protrusion is provided around the button-type operation member and protrudes to an outer peripheral side of the button-type operation member. Also, there is no danger of inadvertently pushing the operating member while holding the lens barrel. According to the present invention as set forth in claim 4, an electric switch interlocked with the button-type operation member is provided on an inner peripheral surface of the ring-shaped elastic member corresponding to the position of the button-type operation member. Is provided so as not to protrude beyond the outer peripheral surface of the fixed outer cylinder, so that there is no danger of breaking the electric switch when the button-type operation means incorporates the integrally formed ring-shaped elastic member into the fixed outer cylinder.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of a lens barrel according to the present embodiment, FIG. 2 is a plan view of a main part thereof cut away, and FIG.
It is principal part sectional drawing of the -A line. In the figure, reference numeral 11 denotes a fixed outer cylinder, and four holes 11 are provided at equal intervals on the outer peripheral surface of the front part.
a, and a flange 11b is formed on the inner peripheral side near the hole 11a. Numeral 12 denotes an elastic ring with a button-type operation portion formed of an elastic member such as rubber. Four button-type operation portions 12a are provided at four places at equal intervals, and the holes are formed on the inner peripheral side of the button-type operation portion 12a. A convex portion 12b having a size to be engaged with the portion 11a is provided, and a protruding portion 12c protruding outward from the button-type operation portion 12a is provided around the button-type operation portion 12a in the optical axis direction. Thus, there is no danger of accidentally pushing the operation unit 12a while holding the lens barrel. Further, on the outer peripheral surface of the elastic ring 12, a knurl 12d for preventing slip is provided at a portion other than the button type operation portion 12a.

Reference numeral 13 denotes a fixed inner cylinder. Reference numeral 14 denotes an electric switch, and 15 denotes a flexible printed wiring board on which the electric switch 14 is mounted and which is connected to an electric circuit (not shown), and is fixed to a switch fixing member 16 by bonding or the like. The switch fixing member 16 is attached to the flange 11b of the guide outer cylinder 11 with screws 17 so that the electric switch 14 is located below the hole 11a.

The assembling operation of this embodiment comprising the above components will be described. First, as shown in FIGS. 2 and 3, the electric switches 14 are mounted on lands for electric switches 14 provided at four locations on the flexible printed wiring board 15, and then the electric switches of the flexible printed wiring board 15 are mounted. The back surface of the portion on which 14 is mounted is fixed to a switch fixing member 16 by an adhesive means such as a double-sided tape. Each is fixed by screws 17 from the optical axis direction so as to be located below 11a.

Here, the electric switch 14 is connected to the elastic ring 1.
When mounting the fixed outer cylinder 11 on the fixed outer cylinder 11, it is attached with care so as not to protrude from the outer peripheral surface of the fixed outer cylinder 11 so as not to interfere with the elastic ring 12 and break. Next, the elastic ring 12 is fitted on the outer peripheral surface of the fixed outer cylinder 11, and the convex portions 1 provided on the inner peripheral side of the button type operation portion 12a are respectively provided.
2b is fixed with an adhesive in a phase that fits into the hole 11a of the fixed outer cylinder 11. At this time, the protrusion 12b and the hole 11a are fitted at only one place, and the remaining three places have a margin between the protrusion 12b and the hole 11a. With such a structure,
It is possible to maintain a tightly fixed state in which no gap is formed between the elastic ring 12 and the outer peripheral surface of the fixed outer cylinder 11. That is, water droplets, dust, and the like that enter from the gap between the fixed outer cylinder 11 and the elastic ring 12 are blocked by the close fixing portion so that the functions of internal mechanical parts and electric parts are not hindered. .

In this embodiment, the elastic ring 12 with the button-type operation part is fixed to the fixed outer cylinder 11 with an adhesive, but the inner diameter of the elastic ring 12 with the button-type operation part is changed to the outer diameter of the fixed outer cylinder 11. If it is made slightly smaller than it is, and it is slightly stretched, it can be fixed without using an adhesive due to the elastic contraction force of the elastic ring itself with the button-type operation unit. Further, in this embodiment, a rubber material is used as the elastic ring 12 with the button-type operation portion. However, it is needless to say that any rubber member can be used as long as it is a member having appropriate moldable elasticity. Furthermore, in this embodiment, the elastic ring 12 with the button type
And is fitted into the hole 11a of the fixed outer cylinder 11,
The fixed outer cylinder 11 may be provided with a convex portion, and the elastic ring 12 may be provided with a concave portion for fitting.

[0013]

As described above, according to the first aspect of the present invention, there is provided a lens barrel capable of automatic focusing and manual focusing, wherein the lens barrel is fixed to an outer peripheral surface of the fixed outer cylinder and the outer peripheral surface of the fixed outer cylinder. Having a ring-shaped elastic member and at least one button-type operating member provided by being formed integrally with the button-type operating member and the ring-shaped elastic member,
The button lock type operation member of the focus lock switch, the AF switch, and the anti-vibration switch having the waterproof property. Even if it is arranged at a plurality of locations on the outer peripheral surface of the fixed outer cylinder of the lens barrel,
The assemblability is significantly improved, and the assembly cost can be reduced. The present invention according to claim 2 is characterized in that at least one convex portion is provided on one of the inner peripheral surface of the ring-shaped elastic member and the outer peripheral surface of the fixed outer cylinder, and a concave portion or a hole corresponding to the convex portion is provided on the other. By forming a portion and fitting the convex portion and the concave portion in at least one place, the position of the operating member of the ring-shaped elastic member can be reliably and easily adjusted to the position of the hole of the fixed outer cylinder. it can. According to a third aspect of the present invention, a protrusion is provided on the outer peripheral surface of the ring-shaped elastic member, the outer peripheral surface of the button-type operation member, the protrusion protruding more outward than the button-type operation member. Also, there is no danger of inadvertently pushing the operating member while holding the lens barrel. According to the present invention as set forth in claim 4, an electric switch interlocked with the button-type operation member is provided on an inner peripheral surface of the ring-shaped elastic member corresponding to the position of the button-type operation member. Is provided so as not to protrude beyond the outer peripheral surface of the fixed outer cylinder, so that there is no danger of breaking the electric switch when the button-type operation means incorporates the integrally formed ring-shaped elastic member into the fixed outer cylinder.

[Brief description of the drawings]

FIG. 1 is an external view of a lens barrel according to an embodiment of the present invention.

FIG. 2 is an external view in which a main part is partially broken.

FIG. 3 is a sectional view of a principal part taken along line AA of FIG. 2;

FIG. 4 is an external view of a conventional lens barrel.

FIG. 5 is a sectional view of an essential part taken along line BB of FIG. 4;

[Explanation of symbols]

11: fixed outer cylinder, 11a: hole, 11b: flange, 12: elastic ring with button type operation part, 12a
..Button-type operation unit, 12b ··· Convex, 12c ··· Projection, 12d ·· Knurl, 13 ··· Fixed inner cylinder, 14 ·
· Electrical switches, 15 · · · Flexible printed wiring boards, 16 · · · Switch fixing members, 17 · · · screws.

Claims (4)

[Claims] 1. A lens barrel capable of automatic focusing and manual focusing, comprising a fixed outer cylinder, a ring-shaped elastic member fixedly provided on an outer peripheral surface of the fixed outer cylinder, and at least one button type. A lens barrel having an operation member, wherein the button-type operation member and the ring-shaped elastic member are integrally formed. 2. At least one convex portion is formed on one of an inner peripheral surface of the ring-shaped elastic member and an outer peripheral surface of the fixed outer cylinder, and a concave portion or a hole portion corresponding to the convex portion is formed on the other. 2. The lens barrel according to claim 1, wherein said convex portion and said concave portion are fitted in at least one place. 3. The button-shaped operation member is provided with a projection on an outer peripheral surface of the ring-shaped elastic member, which protrudes to an outer peripheral side of the button-type operation member. Item 3. The lens barrel according to Item 1 or 2. 4. An electric switch interlocked with the button-type operation member is provided on an inner peripheral surface of the ring-shaped elastic member corresponding to the position of the button-type operation member, and the electric switch is provided outside the fixed member. 4. The lens barrel according to claim 1, wherein the lens barrel is provided so as not to protrude from the outer peripheral surface of the cylinder.