JPS6321632A - Inserting and extracting device for filter of camera - Google Patents

Abstract

PURPOSE:To prevent a photograph from being taken inadvertently at the start of taking a photograph while a filter is still inserted by putting the filter off the optical path of a camera automatically when the main switch of the camera is turned off after a photographing is completed. CONSTITUTION:When a nonphotographic state is changed to a photographic state, a lens barrel is drawn out and then the driving terminal of the driven arm 33 of a barrier opening/closing ring leaves the body. Then, the ring 31 rotates counterclockwise with the tensile force of an energizing spring 36 and barrier opening/closing projection pieces 32 and 32 push the engagement bosses 22 and 22 of a barrier 20. The barriers 20 and 20 rotates around pivot pins 21 and 21 against the energizing force of the energizing spring 24 to leave each other, thereby entering an open state. An interlocking terminal 35 also moves by the rotation of the ring 31, but the operation member 51 of the inserting and extracting device for the filter is still left and held in the off state. Namely, the filter is put off the optical path of photography at any time at the time of photography and in this initial state, photography is started.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention provides a photographing optical system that appears and switches between a photographing state and a non-photographing state, a barrier that hides the photographing optical system during non-photographing, and The present invention relates to a filter insertion/removal device for a camera equipped with a filter that can be inserted into an optical path.

``Prior art'' It is known that in conventional cameras, a soft focus filter or the like is inserted into and removed from the photographing optical path to change the photographic effect. It is used by being inserted and removed, and insertion and removal are generally performed manually based on the photographer's intention to insert and remove the filter.

``Problems to be Solved by the Invention'' However, in this conventional technique of manually inserting and removing the filter, once the filter is inserted, the filter remains in the optical path unless the filter is intentionally removed. Especially in the case of lens-shutter cameras, since it is not possible to confirm the insertion of the filter through the viewfinder (unless it is done by other means), it is possible to accidentally take a picture with the filter inserted, even if there is no intention to insert the filter. This problem is likely to occur when a series of shots ends and the next one begins, and in order to prevent this, it is necessary to check the filter status every time you start shooting, which is extremely troublesome. Ta.

The present invention has been made by focusing on such conventional problems, and is designed so that when the main switch of the camera is turned off after photographing, the filter exits from the optical path even if it is not intended. It is an object of the present invention to provide a filter insertion/removal device for a camera that solves the above-mentioned problems.

"Means for Solving the Problems" The gist of the present invention for achieving the above object is to provide a photographing optical system that can be switched between a photographing state and a non-photographing state, and a photographing optical system that can be switched between a photographing state and a non-photographing state, and a photographing optical system that can be switched between a photographing state and a non-photographing state, A filter insertion/removal device for a camera comprising a barrier for concealing a system and a filter insertable into a photographing optical path, the barrier driving mechanism comprising an engaging portion fixed to a camera body and a filter for controlling a photographing state. an operating member that moves together with the photographing optical system and engages with the engaging portion to cause the barrier to perform a concealing operation when switching from to a non-photographing state; The present invention resides in a filter insertion/removal device for a camera, characterized in that it is provided with an evacuation mechanism that is driven to eject the filter out of the photographing optical path of a photographing optical system.

``Function'' However, when the main switch of the camera is turned off after shooting, the shooting optical system begins to collapse into the camera body, and the driven end of the operating member of the barrier drive mechanism engages with the retaining part fixed to the camera body. This engagement causes the barrier to protect and hide the photographic optical system.

This movement of the barrier is transmitted to the filter retraction mechanism, and if the filter has been inserted into the photographing optical path, it is removed.

During normal photography, the operating members of the barrier drive mechanism are separated from the camera body, and the filter retraction mechanism is not restricted, allowing the filter to be manually inserted into and removed from the photographing optical path.

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

Each figure shows one embodiment of the invention.

As shown in FIGS. 1 to 3, a lens barrel 11 of a photographing optical system 10 is disposed in front of a camera body 2 of a camera 1 so that it can be switched between a photographing state and a photographed state. 11
is equipped with various lenses (not shown). A main switch 3 and a shirt release button 4 are provided on the top surface of the camera body 2.

A set of two barriers 20, 20 is arranged so as to hide the front surface of the lens barrel 11 of the photographing optical system 10, and includes a drive mechanism 30 for the barriers, a filter 40 to be inserted into and removed from the photographing optical path, and a filter 40 to be inserted into and removed from the photographing optical path. A removal device 50 is provided within the lens barrel 11.

The barriers 20,20 have symmetrical vane shapes which, when matched, hide the front surface of the lens barrel 11 as shown in phantom lines, and are each pivoted to the front of the lens barrel 11 at pivot pins 21.

At the base of each barrier 20 is an engagement post 22 and a biased pin 23.
is installed protrudingly. Lens barrel 11 near the cover pin 23
A biasing spring 24 is wound around the mounting pin 12 fixedly attached to the mounting pin 12, and the biasing end 24a of the biasing spring 24 is engaged with the biased pin 23, so that the barriers 20, 20 are mutually closed. biased in the direction.

The barrier drive mechanism 30 opens and closes the barrier 20.20 in front of the lens barrel 11 of the photographic optical system 10.

The Pari-ya drive mechanism 30 is built into the lens barrel 11 of the photographic optical system 10, and moves together with the lens barrel 11 when switching from a photographing state to a non-photographing state, and opens and closes the barrier, which is an operating member. Ring 31 constitutes the main component.

The barrier opening/closing ring 31 is rotatably held at the tip of the lens barrel 11, and has a barrier opening/closing protrusion 32° 32, a driven arm 33, a biased end 34, and an interlocking end 35 protruding from the outer periphery. has been done.

The barrier opening/closing protrusions 32, 32 are opposed to the engagement posts 22, 22 of the barriers 20, 20, and are rotated so that the engagement posts 22, 22
．． When 22 is pressed, the barrier 20°20 is placed in a position to open.

The driven arm 33 is bent and extends rearward along the optical axis;
The tip forms a driven end 33a. Driven arm 33
An engaging portion 5 is attached to the camera body 2 corresponding to the driven end 33a of the
is fixedly installed, and the inclined surface 5a of the retaining portion 5 faces the driven end 33a.

A biasing spring 36 is stretched between the biased end 34 and the pin 13 provided upright on the lens barrel 11, and the barrier opening/closing ring 31 is moved toward the barrier 20 in the counterclockwise direction in FIG.
．． 20 is biased in the direction of opening. The biasing force of the biasing spring 36 is greater than the biasing force of the biasing spring 24 of the barrier 20.
6 rotates the barrier opening/closing ring 31, the barrier 2
It is set to open at 0°20.

A filter 4 is installed near the interlocking end 35 of the barrier opening/closing ring 31.
0 insertion/removal devices 1150 are provided. That is, the insertion/removal device 50 has an operating member 51 rotatably supported around the optical axis center of the photographing optical system 10 as a main component, and the interlocking end 3 of the barrier opening/closing ring 31 inward from the operating member 51.
An interlocking receiver g52 extends at a position facing 5, and an operating end 53 is protruded outwardly.

The support bar 41 of the filter 40 is fitted into the groove 55 of the base portion 54 of the operating member 51, and the filter main body 43 is supported by the support arm 42 fixed to the tip of the support bar 41.

The support arm 42 is pivotally supported by the lens barrel 11 via a pivot 44, and a stopper 14 for inserting the filter body 43 is fixed to the lens barrel 11.

The interlocking receiving end 52 is the interlocking end 3 of the barrier opening/closing ring 31.
5, the interlocking receiving end 52 and the interlocking end 35 of the barrier opening/closing ring 31 are set so that the filter main body 43 of the filter 40 can be engaged only in the direction of retracting the filter main body 43 of the filter 40 out of the optical path. It constitutes a retraction mechanism for retracting the optical system 10 out of the photographing optical path.

Next, the action will be explained.

1 and 2 show the camera in the shooting state, with the main switch 3 turned on.

The photographing optical system 10 is protruding, the barrier 20.degree. 20 is open, and the filter 40 is inserted into the photographing optical path.

In the barrier drive mechanism 30, the barrier opening/closing ring 31
The driven end 33a of the driven arm 33 is connected to the camera body 2.
The barrier opening/closing ring 31 is rotated by the biasing force of a biasing spring 36.
The barrier opening/closing protrusion 32.32 is located at the engagement post 22 of the barrier 20.
．． 22, the barriers 20, 20 rotate about the pivot pins 21, 21 against the biasing force of the biasing spring 24, and are held open apart from each other.

The object to be photographed toward which the photographing optical system 10 is directed is photographed through a filter 40. The filter 40 can be inserted and removed as needed.

That is, when the operating member 51 is moved around the center of the optical axis by the operating end 53, the support bar 41 of the filter 40 held in the groove 55 of the base portion 54 of the operating member 51 is moved as shown in FIG. When pushed, the support arm 42 rotates around the pivot 44, and the filter body 43 is switched between an inserted state in which it contacts the stopper 14 and a retracted state.

By setting an appropriate state and pressing the shirt release button 4, a desired photograph can be taken.

When photographing is completed and the main switch 3 is turned off, an electric mechanism (not shown) causes the lens barrel 11 of the photographic optical system 10 to retract with the filter 40 still inserted into the image optical path, and the barrier opening/closing ring accordingly closes. The driven end 33a of the driven arm 33 of No. 31 contacts the inclined surface 5a of the engaging portion 5. Lens barrel 11
When it is further collapsed and stored in the camera body, the driven end 33a is guided by the inclined surface 5a, and the biasing spring 36 is applied to the barrier opening/closing ring 31 via the driven arm 33.

When the barrier opening/closing ring 31 rotates clockwise, the barrier opening/closing protrusion 32.32 moves to the engagement post 22.22 of the barrier 20.
is released, and the barrier 20 rotates around the pivot pin 21.21 due to the biasing force of the biasing spring 24, and the photographic optical system IO
match in front to hide and protect it.

Due to the rotation of the barrier opening/closing ring 31, the interlocking receiving end 52 of the operating member 51 of the filter insertion/removal device 50 is pushed by the interlocking end 35 of the barrier opening/closing ring 31, and the operating member 51 moves clockwise in FIG. As a result, as can be seen in FIG. 3, the filter 40 is withdrawn from the photographing optical path and held in that state, the lens barrel 11 of the photographing optical system 10 is completely submerged, and the camera 1 is moved to the object to be photographed as shown in FIG. become a state.

Lens barrel 1 to change from the photographed state to the photographing state shown in Fig. 4.
1, the barrier drive mechanism 30 is also pulled out. When the lens barrel 11 is completely pulled out, the driven end 33a of the driven arm 33 of the barrier opening/closing ring 31 separates from the engaging portion 5 fixedly attached to the camera body 2.

The barrier opening/closing ring 31 is rotated counterclockwise in FIG. 2 by the urging force of the urging spring 36, and the barrier opening/closing protrusion 32
．． 32 pushes the engagement post 22.22 of the barrier 20, and the barriers 20, 20 resist the biasing force of the biasing spring 24 and push the pivot pin 2.
1.21, and are spaced apart from each other to be in an open state.

Although the interlocking end 35 also moves due to the rotation of the barrier opening/closing ring 31, the operating member 51 of the filter insertion/removal device 50 is left behind and remains in the retracted state.

That is, at the time of starting photographing, the filter 40 is always retracted from the photographing optical path, and photographing is started with this as an initial state.

"Effects of the Invention" According to the filter insertion/removal device for a camera according to the present invention, since the filter always exits from the photographing optical path when photographing starts, there is no risk of photographing with the filter inserted by mistake. Since the condition of the filter at the start is clear, there is no need to make complicated checks, allowing comfortable and reliable photography.

[Brief explanation of the drawing]

Each figure shows an embodiment of the present invention. Figure 1 is a perspective view of the main parts showing the inside of the camera in the shooting state, Figure 2 is a front view of the main parts of the lens barrel, and Figure 3 is a front view of the main parts of the lens barrel. FIG. 4 is a sectional view of the main parts and a perspective view of the main parts showing the inside of the camera in a non-photographing state. 1... Camera 2... Camera body 5... Engagement part 5a... Inclined surface 10
...Photographing optical system 11... Lens barrel 20...
Barrier 30...Barrier drive mechanism 31...
・Barrier opening/closing ring 33...driven arm 33a
... Driven end 35 ... Interlocking end 40 ...
Filter 41...Support/<-42...
・Support arm 43...filter body 50・
...Filter insertion/removal device 51...Operation member 52...
- Interlocking receiving end 53... Operating end Fig. f Fig. 5 Fig. 4

Claims (1)

[Scope of Claims] A camera equipped with a photographing optical system that appears and switches between a photographing state and a non-photographing state, a barrier that hides the photographing optical system when not photographing, and a filter that can be inserted into the photographing optical path. In the filter insertion/removal device, the barrier drive mechanism includes an engaging portion fixed to the camera body, and the engaging portion that moves together with the photographing optical system when switching from a photographing state to a non-photographing state. an operating member that engages with the operating member to cause the barrier to perform a concealing operation, and includes an evacuation mechanism that allows the filter to be moved out of the photographing optical path of the photographing optical system in accordance with the operation of the operating member of the barrier drive mechanism. A filter insertion/removal device for a camera, characterized in that: