JPS6235050Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a zoom lever device that can switch between a macro range and a zoom range.

Generally, in the case of a camera equipped with a zoom lever with a macro switching mechanism for a zoom lens with a macro, the zoom lever with a macro switching mechanism is rotatably attached to a fixed barrel, and the lens is moved forward and backward by the rotation. A lever barrel having one end fixed to the zoom ring connected in this manner, and a switching shaft member having a stopper portion at the tip that is slidably fitted into the lever barrel are attached, and a switching knob having a knob portion with a larger diameter than the lever barrel that engages with the opening end surface on the other side of the lever barrel, and the knob is moved from the center of rotation of the zoom ring to the outer side of the zoom ring. After releasing the lock of the zoom ring by displacing the stopper part of the switching shaft member by pulling it toward The lens is switched from the zoom range to the macro range.

In this case, the focal length of the lens is adjusted to the focal point of the photographer's choice by operating the lever barrel, and the lever barrel is pressed with the pad of the finger.
Since the lever barrel is operated by relying on the sensation of the fingers, there is a risk of accidentally pulling the switching knob and entering the macro range while rotating.
There is a problem in that images are taken with a lens that is set to a macro area that is not intended by the photographer, resulting in erroneous images.

The present invention was created in consideration of the above-mentioned problem, and prevents the switching knob from being pulled by mistake when operating the lever barrel, thereby preventing erroneous shots in the macro range that are not intended by the photographer. The object of the present invention is to provide a zoom lever device.

The configuration of the device of the present invention is such that a switching knob, which is slidably fitted into a lever cylinder whose one end is fixed to the zoom ring, is directed outward from the rotation center of the zoom ring. In a zoom lever device in which the zoom ring is rotated from a zoom range to a macro photography range by pulling, the other end of the lever barrel is located closer to the zoom ring than the switching knob. It is characterized in that a flange portion is provided at a location that has a larger diameter than the middle portion of the lever barrel and has a width that allows a fingertip to be caught.

Hereinafter, one embodiment of the device of the present invention will be described based on the drawings.

In FIG. 1, reference numeral 1 denotes a fixed barrel provided on the camera body, and a zoom ring 2 on the outer periphery of the fixed barrel 1 is connected to a lens (not shown) and moves the lens forward and backward on the axial extension of the fixed barrel 1. is rotatably mounted.

One side opening end of a lever barrel 3 is screwed and fixed to the circumferential portion of the zoom ring 2, and a shaft member 4 is fitted into the lever barrel 3 in a slidable and loosely fitted state.

A locking part 4a is formed at the left end of the shaft member 4 extending from the lever cylinder 3, and the right end thereof is screwed into the inside of the knob cylinder 5 whose right end is closed.
It is glued and a switching knob 6 is provided.

A notch 7 is formed in the circumference of the intermediate portion of the stopper portion 4a, and a substantially annular spring-locking resin stopper 8 is attached to the notch 7. This stopper 8
A collar 8 is disposed between the right end surface 8a of the lever tube 4 and a spring locking portion 9 provided at the inner right end portion of the lever tube 3 facing the end surface 8a and protruding toward the center of the lever tube 4. A spring 10 is interposed to bias the stopper 8 toward the center of the zoom ring 2.

This spring 10 is attached to the outer peripheral grip portion 5a of the knob cylinder 5.
When you place the pad of your finger on the multiple grooves 11 formed in the fixed cylinder 1 and pull it outward from the center of rotation of the zoom ring 2, the height will be slightly higher than the height of the step 1a formed in the fixed barrel 1. The tip of the locking portion 4a is set to be lifted up.

The step portion 1a is formed in a groove portion 12 formed on the circumference of the fixed cylinder 1, and the area between the upper surface of the groove portion 12 and the rising portion of the step portion 1a is a zoom area a, and the rising portion of the step portion 1a. The rotation of the zoom ring 2 is restricted by a stopper 8 provided at the tip of the switching knob 6 so that the area from the top to the bottom surface of the groove 12 is a macro area b.

The plurality of grooves 11 are formed in concave portions that can be felt with the pads of fingers, and the diameter of the convex portion is larger than that of the flange portion 13 at the right end of the lever tube 3, which is formed to have a larger diameter than the middle portion of the lever tube 3. It is formed to be approximately the same diameter as the .

The flange portion 13 is formed to have a rising width W that allows a fingertip to be caught thereon.

Moreover, the leftmost groove part 1 among the plurality of groove parts 11
1 is formed with the right end surface of the lever barrel 3 as one side, and is formed so that the difference between the lever barrel 3 and the switching knob 6 can be detected with a finger.

The device of the present invention having the above-mentioned configuration operates as follows.

First, when operating the lever barrel 3 in the zoom range a, the pressing force with the pad of your finger causes your finger to move onto the lever barrel 3.
(i.e. the direction in which the switching knob 6 is pulled)
Even if the flange 13 moves to the zoom ring 2, the position of the flange 13 is closer than the switching knob 6.
Since the movement of the finger is restricted, there is no possibility of accidentally pulling the grip portion 5a of the switching knob 6 with the finger. Therefore, the photographer is prevented from accidentally taking a picture in the macro range b while taking a picture in the zoom range a.

Next, when rotating the zoom ring 2 to the macro range b, turn the switching knob 6 in the groove 11,...
with the pad of your finger, grasp the grip 5a, pull the switching knob 6 from the center of rotation of the zoom ring 2 to the outside of the zoom ring 2, and then turn the knob 6 downward (in the direction of arrow Y). When rotated, initially the stepped part 1
The tip of the stopper 8 is placed on top of the spring 1
With a biasing force of 0, the stopper 8 is reliably positioned on the stepped portion 1a, and photography in the macro area b is performed. In this embodiment, since the knob 6 is provided with several grooves 11,...
This has the effect of giving a sense of beauty that allows one to reliably grasp the meaning of a.

FIGS. 2 and 3 show other embodiments of the device of the present invention. Note that the same components as those described in one embodiment are given the same reference numerals, and the explanation thereof will be omitted.

In this example, the lever barrel 3' is connected to the zoom ring 2.
An inner cylinder 14 onto which the zoom ring 2 side end is screwed
The end of the inner circumference of the opening on the zoom ring 2 side of the outer cylinder 15 is screwed to the outer circumference of the open end of the other end. Stop part 1
An annular thin plate-shaped washer 17 as shown in FIG. 3 is attached to a recess 16 formed by the inner cylinder 5a and the end surface of the end of the inner cylinder 14 which is screwed onto the outer cylinder 15.

Further, the switching knob 6' is formed by integrally molding the knob part 5' and the shaft member 4',
A screw hole 19 is provided at the end of the shaft member 4' on the zoom ring 2 side.
is bored in the axial direction, and a screw 20 is screwed into the hole 19 to form a locking part 4'a, and the hole 17 of the washer 17 is formed in the middle part of the shaft member 4'.
When the hole 17a is expanded and the hole 17a is restored, a flange 21 is provided that protrudes and is engaged with the hole 17a.

On the outer periphery of the locking portion 4'a, a locking portion for locking the end of the spring 10 on the zoom ring 2 side is provided with a stepped portion 8' on the outer periphery.
A cylindrical stopper 8' formed by providing a is fitted.

A notch 5'b is provided on the outer periphery of the knob 5' at the end that contacts the flange 13', and a notch 5'b is provided on the outer periphery of the end of the flange 13' that is in contact with the knob 5'. A V-shaped groove 11' is formed with the notch 13'a, so that the difference between the knob 5' and the lever barrel 3' can be felt with the pad of a finger. Also, the switching knob 6' is moved from the rotation center of the zoom ring 2 to the zoom ring 2.
The installation position of the flange portion 21 is determined so that when the flange portion 21 is pulled outward, the flange portion 21 is moved slightly more than the rising width of the stepped portion 1a. Other embodiments configured in this manner also have the same functions and effects as the one embodiment, but in the case of one embodiment, the stepped portion 1a
It is necessary to hold the grip part 5'a of the knob 6 with your fingers until the end of the stopper 8 of the switching knob 6 is placed on the end of the stopper 8 of the switching knob 6, but in this case there is no need to do so. Switching to area b becomes smoother.

As is clear from the above-described configuration, according to the device of the present invention, even if the finger moves closer to the switching knob while operating the lever barrel, the position relative to the zoom ring remains closer to the switching knob. The movement of the finger is restricted by the flange, which is close to the lens, before it reaches the switching knob, which prevents the finger from being pulled by mistake and prevents the photographer from taking unintended shots in the macro range. Other effects include ensuring that switching from the zoom range to the macro range is performed.

[Brief explanation of drawings]

Fig. 1 is a sectional front view of the main part showing one embodiment of the device of the present invention, and Figs. 2 and 3 show other embodiments of the device of the invention, and Fig. 2 is a sectional front view of the main part; Figure 3 is a front view of the washer. 2...Zoom ring, 3, 3'...Lever barrel, 6,
6... Switching knob, 13, 13... Flange, a...
...zoom area, b...macro area.

Claims (1)

[Claims for Utility Model Registration] A switching knob slidably fitted into a lever cylinder whose one end is fixed to the zoom ring is directed outward from the rotation center of the zoom ring. In a zoom lever device in which the zoom ring is rotated from a zoom range to a macro range by pulling, the other end of the lever barrel is located at a location closer to the zoom ring than the switching knob. A zoom lever device comprising: a flange portion having a diameter larger than the middle portion of the lever barrel and having a width such that a fingertip can be caught on the flange portion.