JPH0631460Y2 - Camera auxiliary optical system switching device - Google Patents

Description

[Detailed description of the device]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera auxiliary optical system switching device, and more particularly to a camera auxiliary optical system switching device having a front cover for covering a taking lens. Generally, an auxiliary optical system such as a filter for a camera is used by mounting it on a screw provided on the inner circumference of the front end of the taking lens. However, in a compact portable camera having a front lid that covers the lens, the camera is thin. In order not to have a screw for attaching a filter etc. on the front of the taking lens,
It is not possible to use conventional screw-on auxiliary optics. However, even in this type of camera, it is often better to use a filter or the like. Therefore, an attempt to incorporate a filter into the camera has been made, for example, in Japanese Utility Model Laid-Open No. 54-393.
It is disclosed by the published utility model publication No. 1 and is already known.

[0002] In the camera with a filter disclosed in this published utility model publication, a front cover that covers the front of a retractable photographic lens is provided on the front of the camera, and a filter is pivotally supported inside the front cover. The filter is erected and the front surface of the photographing lens is covered with the filter as needed. Therefore, in this known camera, since the user never forgets to carry the filter, the camera having the front lid is very useful.

However, in this known filter switching device, when the filter is not used, since the surface of the filter is laid in front of the taking lens, the reflected light from the surface enters the taking lens, This may cause flare and may harm shooting. In addition, since the operation of opening the front lid and the operation of raising the filter are performed by completely different operations, it takes time to perform the shooting preparation operation when the filter is used, and there is a risk of missing a photo opportunity.

The present invention solves the above-mentioned drawbacks known in the related art, interlocks with the operation of opening and closing the front lid of a camera, and attaches and removes a filter and the like as necessary, and when not in use, the filter and the like take a picture. It is an object of the present invention to provide an auxiliary optical system switching device that does not disturb the above.

1 to 3 are perspective views showing an example which is a premise of the present invention, and does not include a part of the configuration of the present invention.
1 shows a state in which the front lid is closed, FIG. 2 shows a state in which the front lid is opened to expose the taking lens, and FIG. 3 shows a state in which a filter is attached to the front surface of the taking lens. In FIG. 1, a front lid 2 provided on the front surface of the camera body 1
Is a protrusion 2a that engages with the guide groove 1a of the camera body 1.
It is slidably supported on the camera body 1 via. Further, notched groove 2b ₁ of the three on the end face of the protruding portion 2a of the front cover 2, 2b _2, 2b ₃ is provided, the tip 3a of the nail lever 3 in the groove 2b _1-out one notch of the engagement is doing. The pawl lever 3 is rotatably supported by a shaft 4 planted in the camera body 1, and a coil torsion spring 6 whose one end is always fixed by a pin 5 is clockwise about the shaft 4 in FIG. It is urged to rotate.

Further, in FIG. 1, a filter holding frame 7 is integrally formed so as to project from the left end of the front lid 2, and a filter 8 is fitted into the filter holding frame 7. In addition, between the filter 8 and the front lid 2, an opening 7 large enough not to block the photographing light flux entering the photographing lens 9.
a is formed. Since the example showing the premise of the present invention shown in FIG. 1 is configured as described above, at the time of photographing, first, one end 3b of the pawl lever 3 of the locking means is pushed in the direction of arrow A, and the pawl lever 3 is pressed.
Counterclockwise against the urging force of the coil torsion spring,
The front end 3a is disengaged from the notch groove 2b ₁ of the front lid 2 by rotating the front end 3a. Next, the finger rest 2c provided on the surface of the front lid 2 is pushed in the direction of arrow B, and the front lid 2 is slid rightward in FIG. 1 along the guide groove 1a to open. Normally, the front lid 2 is moved from the first position covering the taking lens 9 to the second position where the opening 7a is in front of the taking lens 9 as shown in FIG. Notch groove 2b
₂ is engaged and the front lid 2 is fixed at that position for photographing. In addition, when using the filter according to the shooting intention, slide the front lid further to the right in FIG. 2 by the same operation,
The filter 8 is moved to the third position shown in FIG. 3 to position the filter 8 in front of the taking lens 9, and the tip 3a of the claw lever 3 is cut by the biasing force of the coil torsion spring 6 to form the cutout groove 2b of the front lid 2.
_Then , let it fall to ₃ and fix the filter 8 together with the front lid 2 in that position. Therefore, in the example showing the premise of the present invention, with a very simple structure, the loading / unloading of the filter can be arbitrarily switched depending on whether the front lid 2 is placed in the second position or the third position. Therefore, the filter can be easily attached and detached, and it can be done quickly, and there is no risk of missing a photo opportunity.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. 4 and 5 are perspective views of the first embodiment of the present invention.
Shows the state in which the front lid is opened, and FIG. 5 shows the state in which the filter is positioned in front of the taking lens. It should be noted that members having the same functions as those of the example showing the premise of the present invention in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and the description of the structure thereof will be omitted. 4 and 5, the guide groove 1a of the camera body 1
A filter holding frame 10 having a filter 8 at one end is rotatably supported by a support shaft 11 planted on the inner surface of the front lid 2 inside the front lid 2 which is slid to the left and right while being guided by. ing. This filter holding plate 10 is constantly urged by a tension spring 12 so as to rotate clockwise around the support shaft 11 in FIG. 4, and the rotation thereof causes the filter 8 to move forward as shown in FIG. At a position where the front cover 2 retreats into the lid, it is configured to come into contact with the limiting pin 13 that is planted on the inner surface of the front lid 2 to be limited. Further, the filter holding frame 10 has two continuous cam grooves 14a and 1a.
4b is formed, one cam groove 14a is formed long in the left-right direction in FIG. 4 in conformity with the sliding direction of the front lid 2, and the other cam groove 14b is inclined at a predetermined angle with respect to the one cam groove 14a. It is formed in a circular arc shape. The two cam grooves 14
A fixing pin 15 implanted in the camera body 1 is provided inside a and 14b so as to be slidable.

Since the first embodiment shown in FIG. 4 is constructed as described above, when the camera is normally carried, the front lid 2 is used.
1 is placed at the first position for covering the taking lens 9 and the tip 3a of the claw lever 3 engages with the cutout groove 2b ₁ of the front lid 2 as in FIG. 1 showing the premise of the present invention. It is fixed. FIG. 6A is an explanatory diagram showing a state of the filter holding frame 10 when the front lid 2 is at the first position. In the state where the front lid 2 is closed, the tension pin 12 abuts and is fixed to the limiting pin 13 by the urging force of the tension spring 12, and the fixing pin 15 implanted in the camera body 1 is located at the right end of the cam groove 14a. .

When the front lid 2 is slid from the first position to the second position during photographing, the fixing pin 15 slides in the cam groove 14a as shown in FIG. 6 (b). Although it reaches the left end of 14a, since the direction of the cam groove 14a and the sliding direction are the same, the filter holding frame 10 has the limiting pin 1
It is left in contact with No. 3. In the case of normal photographing, at this second position, the photographing lens 9 is exposed as shown in FIG. 4, and the tip 3a of the claw lever 3 is attached to the notch lid 2 of the front lid 2.
By engaging the b ₂ and fixing the front lid 2, it becomes possible to take an image.

When shooting with a filter,
Disengage the claw lever 3 from the notch groove 2b _2, and remove the front lid 2
4 further slides left and right in FIG. 4, the support shaft 11 that rotatably supports the filter holding frame 10 moves in the direction of arrow B, as shown in FIG. 6C. However, since the fixing pin 15 implanted in the camera body 1 does not move, the cam groove 14
b is pressed by this fixing pin 15. Therefore, the filter holding frame 10 moves in the direction of the arrow B and resists the urging force of the tension spring 12 to center on the support shaft 11.
In (c), rotate counterclockwise (direction of arrow B), and
As shown in (d), the fixing pin 15 comes into contact with the end of the cam groove 14b and stops its rotation. At the same time, the front lid 2 comes into contact with the right end of the guide groove 1a and stops at the third position, and as shown in FIG. 5, the tip 3a of the pawl lever 3 and the notch groove 2b ₃
Is locked in that position by engagement with. The filter 8 is slid to the front of the taking lens 9 and fixed at that position.

Next, when removing the filter 8 from the front surface of the taking lens 9, contrary to the above-mentioned operation, the one end 3b of the pawl lever 3 of the fixing means is pushed against the biasing force of the coil torsion spring 6 and its after removing the engagement between the tip 3a and the notched groove 2b _3, to move the front cover 2 to the left in FIG. 5 from the third position to the second position. Then, the distance between the support shaft 11 supporting the filter holding frame 10 and the fixing pin 15 is shortened, so that the film holding frame 10 moves the support shaft 11 in the clockwise direction along the cam surface 14b by the urging force of the tension spring 12. When the filter 8 is rotated to the center, the filter 8 is returned to the state of being housed in the front lid 2 as shown in FIG. Further, when the front lid 2 is moved leftward in FIG. 4 from the second position to the first position, the fixing pin 15 slides in the cam groove 14a, and as shown in FIG. 6 (a), After moving to the right end of the cam groove 14a, the front lid 2 stops at the position where the taking lens 9 is covered, that is, the first position. Therefore, by engaging the tip end 3a of the claw lever 3 with the notch groove 2b ₁ , the front lid 2 is fixed at its first position. Therefore, there is no possibility that the front lid 2 is easily opened and the photographing lens is damaged while the camera is being carried. In this embodiment, the amount of movement of the filter 8 that slides between the inside of the front lid and the front surface of the taking lens 9 depends on the movement of the front lid 2 during this operation.
Will be larger than the movement amount of. That is, the amount of movement of the front lid 2 for inserting and removing the filter 8 on the front surface of the taking lens 9 can be reduced, so that the filter can be inserted and removed with a slight operation of the front lid 2.

7 to 9 are plan views of a second embodiment of the present invention. FIG. 7 is a state in which a front lid is closed, FIG. 8 is a state in which the front lid is open, and FIG. The state of being located at. It should be noted that members having the same functions as those of the precondition example in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and the description of the structure of the members is omitted. 7, a filter holding frame 20 for holding a filter 8 is provided inside a front lid 2 slidably supported by a guide groove (not shown) similar to the guide groove 1a shown in FIG. Is stored. The filter holding frame 20 is provided with two long guide grooves 20a on both sides thereof in a direction coinciding with the sliding direction of the front lid 2, and the inside of the guide grooves 20a is planted on the back surface of the front lid 2. The filter holding frame 20 is slidably supported by the guide pins 21. Further, the filter holding frame 20 is constantly urged by the two tension springs 22 having one end fixed to the camera body 1 so as to be displaceable leftward in FIG. 7, and the protrusion 20b formed to project to the upper right end is hooked. Movement to the left is stopped by the stop lever 23. The latch lever 23 is rotatably supported by a support shaft 24 that is planted on the back surface of the front lid 2, and is configured so that it can always rotate clockwise around the support shaft 24 by a coil torsion spring 25. The rotation is restricted by a restriction pin 26 provided on the back surface of the front lid 2. In addition, a claw portion 23a that engages with the protrusion 20b of the filter holding frame 20 is provided on a side surface of the latch lever 23, and a tip end portion thereof can contact a fixed protrusion 27 provided on the camera body 1. An inclined surface 23b is formed.

Prior to photographing, the claw lever 3 and the cutout groove 2b ₁ of the front lid 2 are disengaged as in the precondition example of FIG.
When the front lid 2 is slid to the right from the first position to the second position shown in FIG. 7, the latch lever 23 is also slid to the right.
Since the projection 20b of the filter holding frame 20 is engaged with the claw portion 23a of the latch lever 23, the filter holding frame 20 moves rightward together with the front lid 2 against the biasing force of the tension spring 22. , Escape from the front of the taking lens 9. At this second position, when the claw lever 3 is engaged with and fixed to the notch groove 2b ₂ of the front lid 2 as in FIG. 1, the front lid 2 is opened as shown in FIG.

In the case of using a filter, FIG.
When the front lid 2 is displaced slightly to the right from the second position, the inclined surface 23b of the end portion of the latch lever 23 comes into contact with the fixing protrusion 27 of the camera body and resists the biasing force of the coil torsion spring 25. Rotates about the support shaft 24 in the counterclockwise direction. Therefore, the claw portion 23a of the latch lever 23 and the protrusion 20b of the filter holding frame 20 are disengaged, and the filter holding frame 20 is displaced leftward by the urging force of the tension spring 22 as shown in FIG. It stops at a position where 8 covers the front surface of the taking lens 9. Further, the front lid 2 is fixed at the third position shown in FIG. 9 by the engagement between the claw lever 3 of the fixing means and the cutout groove 2b ₃ . The filter holding frame 20 which is moved by the tension spring 22 charged here
Is larger than the movement amount of the front lid 2 from the second position. In order to return to the normal shooting state (filter withdrawal state) as shown in FIG. 8 from the state of FIG. 9 in which the filter 8 is attached to the photographing lens 9, once move the front lid 2 from the third position to the left. Then, the filter 8 is returned to the state of FIG. 7 at the first position, the filter 8 is housed in the front lid 2, and the claw portion 23a of the latch lever 23 and the projection 20b of the filter holding frame 20 are engaged with each other, and then the front lid 2 2 may be moved to the right to bring it to the second position shown in FIG.

In the second embodiment described above, since the tension spring 22 is charged by the operation of opening the front lid 2 for normal photographing, the latching of the filter holding frame 20 by the latching lever 23 is released, and the filter 8 is released. The amount of movement of the front lid 2 can be made extremely smaller than the amount of movement of the filter 8 for mounting on the front surface of the taking lens 9. Therefore, the third embodiment can be applied to a camera having a relatively short width.

In each of the first and second embodiments described above, the normal operation state is set by the first operation of opening the front lid 2, and the filter 8 is attached to the front surface of the taking lens 9 by the subsequent second operation. It is configured as described.
However, it does not matter if the order of switching between the normal shooting and the shooting using the filter is reversed. FIG. 10 shows the present invention in which the filter 8 is attached by the first movement of the front lid, and the filter 8 is retracted from the front surface of the taking lens by the second movement that follows and is housed in the front lid. It is a top view which shows the related technical example.
FIG. 10 shows a state in which the front lid 2 is closed and the front surface of the taking lens 9 is covered with the front lid 2 (not including a part of the configuration of the present invention).

In FIG. 10, the front lid 2 which covers the taking lens 9 is rightward (in the direction of arrow B) as in the example showing the premise of FIG.
It is configured to be slidable along the front wall of the camera (not shown). Filter holding frame 30 having filter 8
Is rotatably supported by a support shaft 31 planted on the back surface of the front lid 2, and is urged by a tension spring 32 so as to always rotate clockwise about the support shaft 31. The clockwise rotation is restricted by contacting one end 33a of a sliding member 33 slidably provided on the camera body (not shown). The sliding member 33 is provided with a guide groove 33b elongated in the same direction as the moving direction of the front lid 2 (direction of arrow B), and two guide pins 34 planted in the camera body are provided in the guide groove. It is configured to slide inside 33b. Further, the sliding member 33 is the tension spring 3 for the filter frame 30.
The tension spring 35 having a stronger urging force than that of 2 always urges the slider so that it can move to the left in FIG. 10, and the movement is caused by the movement of the sliding member 33 to the limiting pin 36 implanted in the camera body. It is limited by the contact of the protrusion 33c protruding from the side surface.

On the other hand, the protrusion 33c of the sliding member 33 is engaged with a protrusion 39 provided at one end of a pressing lever 38 rotatably supported by a support shaft 37 planted in a camera body (not shown). I am fit. The pressing lever 38 is constructed so as to be constantly biased by a tension spring 40 having a weaker biasing force than the tension spring 35 for the sliding member 33 so as to rotate counterclockwise about the support shaft 37. There is. Further, a projecting pin 41 is provided between the support shaft 37 of the pressing lever 38 and the projection 39, and when the front lid 2 moves to the right in FIG. 10, the projecting portion 2a formed on the front lid 2 is formed. , This protruding pin 4
The pressing lever 38 is configured to rotate in a counterclockwise direction about the support shaft 27 by abutting on the shaft 1.

Since this technical example is constructed as described above, the front cover 2 at the first position as shown in FIG. 10 which covers the taking lens 9 and accommodates the filter 8 therein is shown in FIG.
When the front lid 2 is opened by moving to the second position shown in (a) to the right (direction of arrow B), the support shaft 31 supporting the filter holding frame 30 also moves to the right. However, since one end 33a of the sliding member 33 is in contact with the filter frame 30, the filter holding frame 30 resists the urging force of the tension spring 32 and rotates counterclockwise in FIG. When rotated, the filter 8 is displaced to the front surface of the taking lens 9 as shown in FIG. In this second position, fixing means not shown (for example, the claw lever 3 and the notch groove 2 in FIG. 1)
If the front lid 2 is fixed by b ₂ ), it is possible to use the filter 8 for photographing.

When the front lid 2 is moved further to the right from the second position in the state shown in FIG. 11 (a), the protrusion 2a of the front lid 2 causes the protrusion pin 41 of the pressing lever 38 to move to the position shown in FIG.
(A) Since it is pushed rightward in the middle, the pressing lever 38 rotates counterclockwise about the support shaft 37. Due to the counterclockwise rotation of the pressing lever 38, the projection 39 implanted at one end of the pressing lever 38 is displaced to the right in FIG. 11A, and resists the biasing force of the tension spring 35. The protrusion 33c of the sliding member is pressed and displaced rightward. In this case, since the moving distance of the protrusion 39, that is, the moving distance of the sliding member 33 is larger than the moving distance of the projecting pin 41, that is, the moving distance of the front lid 2, the sliding member 33 moves to the right with respect to the front lid 2. It is relatively displaced toward.

Therefore, the filter holding frame 30 is rotated clockwise about the support shaft 31 by the urging force of the tension spring 32, and the filter 8 is moved from the front surface of the taking lens 9 as shown in FIG. It is retracted and stored inside the front lid 2.
Therefore, the front lid 2 in the third position shown in FIG.
Is fixed by a fixing means (not shown) (for example, engagement between the claw lever 3 and the cutout groove 2b ₃ in FIG. 1), normal photographing without using the filter 8 becomes possible.

When the front cover 2 is moved to the left from the third position in FIG. 11 (b) when photographing again using the filter 8, the pressing lever 3 is pushed by the urging force of the tension spring 35.
The sliding member 33 is displaced leftward at the same time as the rotating member 8 rotates clockwise around the support shaft 37 against the urging force of the tension spring 40. However, since the sliding member 33 is larger than the displacement amount of the front lid 2, the filter holding frame 30 is pushed by the one end 33a of the sliding member 33, and the urging force of the tension spring 32 is applied as shown in FIG. The filter 8 is mounted on the front surface of the taking lens by rotating counterclockwise around the support shaft 31.

Further, when the front lid 2 is moved leftward from the second position to the first position in FIG. 11A, the movement of the sliding member 33 is stopped by the projection 33c contacting the limiting pin 36. As a result, the pressing lever 38 also stops moving to the left. Therefore, only the front lid 2 moves to the left, and the filter holding frame 30 rotates clockwise around the support shaft 31 by the urging force of the tension spring 32, and as shown in FIG.
It is stored inside. At the same time, the front lid 2 covers the front surface of the taking lens 9 to protect the taking lens 9.

In each of the above embodiments, the front lid 2 is used.
Moves in one direction (to the right in FIG. 79) from the position where it covers the front surface of the taking lens 9, so that the front lid 2 moves the taking lens 9
The filter 8 is retracted from the front of the
The loading / unloading is selectively switched depending on the retreat position. However, when the front lid 2 placed in a position covering the front surface of the taking lens 9 is moved to one side (for example, to the right), the filter 8 is also moved and retracted from the front surface of the taking lens 9, and the front lid 2 is moved to the other side. The front lid 2 and the filter 8 may be relatively moved so that the filter 8 is located in front of the taking lens 9 when moved to the left (for example, to the left). Further, in any of the above-described embodiments, when the filter is not used, the filter 8 is housed in the front lid 2 (see FIGS. 4 and 8), so that the filter 8 is resistant to external force. At the same time as the protection, the reflected light on the filter surface does not adversely affect the photographing unlike the conventionally known filter housing front cover.

As described above, the auxiliary optical system switching device for a camera according to the present invention is supported by the camera body and covers the front surface of the taking lens at the first position, and from the first position at the first step from the front surface of the taking lens. A front lid that takes a second position that is retracted and a third position that is retracted from the front side of the taking lens in the second stroke from the second position, and an in-plane orthogonal to the optical axis of the taking lens. Auxiliary optical system holding that is supported so that it can be moved by and has an insertion position where the auxiliary optical system is inserted into the optical path of the taking lens and a retracted position where the auxiliary optical system is separated from the optical path of the taking lens in the third stroke A member, the front lid and the auxiliary optical system holding member are interlocked, and the front lid is at the first position and the second position.
Position, the auxiliary optical system holding member is positioned at the detached position, and when the front lid is at the third position, the auxiliary optical system holding member is positioned at the insertion position. Is inserted into the optical path of the photographing lens, and the third stroke, which is interlocked with the second stroke, is longer than the second stroke. With this configuration, the present invention can achieve the following effects. (1) Since the auxiliary optical system support member inserts the auxiliary optical system into the front surface of the photographing lens by the action of the interlocking device in conjunction with the movement of the front lid from the second position to the third position, the movement of the front lid is performed. And the auxiliary optical system can be inserted and removed with a series of operations,
Excellent operability. (2) When inserting / removing the auxiliary optical system in front of the taking lens,
Since the movement amount of the front lid can be reduced with respect to the movement amount of the auxiliary optical system, the length of the camera in the movement direction of the front lid can be shortened.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a front lid is closed in an example for explaining a premise of the present invention.

FIG. 2 is a perspective view showing a state in which a front lid of the example for explaining the premise of the present invention is opened.

FIG. 3 is a perspective view showing a filter attached state of an example for explaining the premise of the present invention.

FIG. 4 is a perspective view showing a state in which a front lid of the first embodiment of the present invention is opened.

FIG. 5 is a perspective view showing a filter mounted state according to the first embodiment of the present invention.

6 (a) and 6 (b) are explanatory views showing a loading / unloading state of the filter in the embodiment of FIG. 4, (a) showing a front lid being closed, (b) showing a front lid being opened, and FIG. 6C is an explanatory view showing that the filter is moving, and FIG. 7D is a view showing when the filter is mounted on the front surface of the taking lens.

FIG. 7 is a plan view showing a state in which a front lid of the second embodiment of the present invention is closed.

FIG. 8 is a plan view showing a state in which a front lid of the second embodiment of the present invention is opened.

FIG. 9 is a plan view showing a mounted state of a filter according to a second embodiment of the present invention.

FIG. 10 is a plan view showing a state in which a front lid is closed in a plan view of a technical example related to the present invention of the present invention.

FIG. 11 is a plan view of a technical example related to the present invention of the present invention, (a) shows a mounted state of the filter with the front lid open, and (b) shows the filter with the front lid open. The top view which shows a retracted state.

[Explanation of symbols for main parts]

 1 Camera body 2 Front lid 3-6 Fixing means 8 Filter 7, 10, 20, 30 Filter holding frame

Claims (3)

[Scope of utility model registration request] 1. A first position supported by the camera body to cover the front surface of the taking lens, a second position retracted from the front surface of the taking lens in a first stroke from the first position, and a second position from the second position. In the process, the front lid takes a third position retracted from the front surface of the taking lens further than the second position, and is supported so as to be movable in a plane orthogonal to the optical axis of the taking lens, and the auxiliary optical system is taken. An auxiliary optical system holding member having an insertion position for insertion into the optical path of the lens and a retracted position for withdrawal from the optical path of the taking lens in the third step from the insertion position; the front lid and the auxiliary optical system holding member; When the front lid is in the first position and the second position, the auxiliary optical system holding member is positioned in the detached position, and when the front lid is in the third position, the auxiliary optical system Positioning the holding member at the insertion position, the auxiliary optical system And a linkage means for inserting into the optical path of the shadow lens than said second stroke, the camera of the auxiliary optical system switching device, wherein the third possible step is longer interlocked thereto. 2. The auxiliary optical system switching device for a camera according to claim 1, wherein the second stroke is shorter than the first stroke. 3. The auxiliary optical system switching device for a camera according to claim 1, wherein the auxiliary optical system is a filter.