JP2503528Y2 - 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. For this reason, it is not possible to use a normal screw-in type auxiliary optical system without a screw for mounting a filter or the like on the front surface of the taking lens. However, even in this type of camera, it is often better to use a filter or the like, so an attempt to incorporate a filter in the camera is already disclosed, for example, as disclosed in Japanese Utility Model Publication No. 54-3931. .

[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, and the front lid of the camera is interlocked with the opening / closing operation to attach / detach the filter or the like as needed, and when not in use, the filter or the like can be removed. It is an object of the present invention to provide an auxiliary optical system switching device that does not disturb shooting.

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, the camera body 1
A front lid 2 provided on the front surface of the camera body 1 is slidably supported on the camera body 1 via a protrusion 2a that engages with a guide groove 1a of the camera body 1. Further, the three notch grooves 2b ₁ , 2b ₂ , 2b ₃ are formed on the end surface of the protrusion 2a of the front lid 2.
Is provided, and the tip 3a of the claw lever 3 is engaged with one of the notch grooves 2b ₁ . 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, the 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 moved. The tip 3 is rotated counterclockwise around the shaft 4 against the biasing force of the coil torsion spring,
Disengage the a and the notch groove 2b ₁ of the front lid 2. 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. The front lid 2 is fixed in that position by engaging with the notch groove 2b ₂ , and an image is taken. In addition, when using the filter according to the intention of photographing, the front lid is further attached by the same operation.
It is slid to the right in the middle, 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 pawl lever 3 is moved by the urging force of the coil torsion spring 6 to the front lid. The filter 8 may be fixed at that position together with the front lid 2 by making it fall into the notch groove 2b ₃ of 2. Therefore, in the example showing the premise of the present invention, the structure is extremely simple,
Depending on whether the front lid 2 is placed in the second position or the third position,
The filter can be switched on and off arbitrarily.
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.

FIG. 4 and FIG. 5 are perspective views of a first technical example related to the present invention (a part of the constitution of the present invention is not provided), FIG. 4 with the front lid open, and FIG. The filter is located 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, a filter holding frame 10 having a filter 8 at one end is provided inside the front lid 2 that slides left and right while being guided by the guide groove 1a of the camera body 1.
Are rotatably supported by a support shaft 11 that is planted on the inner surface of the front lid 2. 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, two continuous cam grooves 14a and 14b are formed in the filter holding frame 10, and one cam groove 14a is formed long in the left and right in FIG. 4 in conformity with the sliding direction of the front lid 2, and the other is formed. The cam groove 14b is formed in an arc shape inclined by a predetermined angle with respect to the one cam groove 14a. The two cam grooves 1
Fixing pins 15 implanted in the camera body 1 are slidably mounted in the cameras 4a and 14b.

Since the first technical example of 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 to the 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. The amount of movement of the front lid 2 that slides from the second position to the third position for mounting the filter 8 on the front surface of the taking lens 9 at this time is the amount of movement that slides from the first position to the second position described above. Less than.

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 it covers the taking lens 9, 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.

7 to 9 are plan views of a second technical example related to the present invention (a part of the structure of the present invention is not provided), FIG. 7 is a state in which the front lid is closed, and FIG. FIG. 9 shows a state in which the front lid is opened, and FIG. 9 shows a 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 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. In addition, the filter holding frame 20
Are two tension springs 2 whose one end is fixed to the camera body 1.
2 is always biased to the left in FIG.
The protrusion 20b formed so as to protrude to the upper right end is stopped from moving to the left by the latch 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 limited by the limiting pin 2 that is planted on the back surface of the front lid 2.
Limited by 6. Also, this latch lever 23
Is provided with a claw portion 23a that engages with the protrusion 20b of the filter holding frame 20.
The inclined surface 23b is formed so as to be capable of contacting the fixed protrusion 27 provided on the.

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 filter holding frame 2
The protrusion 20b of 0 is disengaged, and the filter holding frame 2
As shown in FIG. 9, 0 is displaced to the left by the urging force of the tension spring 22, and stops at the position where the filter 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 . 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 taking lens 9, once move the front lid 2 from the third position to the left. Then, the filter 8 is returned to the state shown in FIG. 7 in 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 filter holding frame 2
After engaging the projection 20b of No. 0, the front lid 2 may be moved to the right to be in the second position shown in FIG.

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

In each of the first and second technical examples 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. Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. FIG. 10 shows that 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 subsequent second movement and is housed in the front lid. It is a top view showing an 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.

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 the embodiment is constructed as described above,
Move the front cover 2 at the first position as shown in FIG. 10 that covers the taking lens 9 and has the filter 8 housed therein to the second position shown in FIG. 11A to the right (direction of arrow B). Front lid 2
When opened, the support shaft 3 supporting the filter holding frame 30
1 also moves to the right. However, one end 33 of the sliding member 33
Since a is in contact with the filter frame 30, the filter holding frame 30 resists the urging force of the tension spring 32 and supports the spindle 3.
11 is rotated counterclockwise in FIG.
As shown in (a), the filter 8 is displaced to the front surface of the taking lens 9. 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 the above-described embodiment, the front lid 2 covers the front surface of the taking lens 9 in one direction (rightward in FIG. 10).
By moving the front lid 2 from the front surface of the taking lens 9, the filter 8 is selectively switched between loading and unloading depending on the retracted position of the front lid 2. However, when the front lid 2 placed at a position covering the front surface of the taking lens 9 is moved to one side (for example, to the right),
The filter 8 also moves together and retracts from the front surface of the taking lens 9, and when the front lid 2 moves to the other side (for example, to the left), the front lid 2 and the filter 8 are placed so that the filter 8 is located in front of the taking lens 9. You may make it move relatively. Further, in any of the above embodiments, when the filter is not used, the filter 8 is housed in the front lid 2 (see FIG. 11 (a)), 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 has a second position that retracts and a third position that retracts further from the front surface of the taking lens in the second stroke from the second position, and in a plane that is orthogonal to the optical axis of the taking lens. And an auxiliary optical system holding member, which is movably supported by an auxiliary optical system and has an insertion position for inserting the auxiliary optical system into the optical path of the photographing lens and a separated position for separating from the optical path of the photographing lens, the front lid and the When the front lid is in the first position and the third position by interlocking with the auxiliary optical system holding member, the auxiliary optical system holding member is positioned at the detached position,
When the front lid is in the second position, the auxiliary optical system holding member is positioned at the insertion position, and the interlocking means for inserting the auxiliary optical system into the optical path of the taking lens is configured. is there. With this configuration, the present invention can achieve the following effects. When taking a picture, it is not possible to hold the camera slowly in a sudden picture and there is a high possibility of pulling the front lid all at once, but in such a situation, an auxiliary optical system is not generally required. On the other hand, if you want to think while taking a picture using the auxiliary optical system, you can calmly hold the camera. The camera of the present invention is capable of moving the front lid and inserting / removing the auxiliary optical system by a series of operations, and by the operation of the interlocking means, from the first position of the front lid to the second position for taking a photographing state. The auxiliary optical system support member can insert the auxiliary optical system into the front surface of the taking lens by moving, and the auxiliary optical system support member moves the auxiliary optical system in front of the taking lens by moving the front lid from the second position to the third position. Can be evacuated from. In other words, if you open the front lid slightly and move it to the second position, you can shoot using the auxiliary optical system, and if you pull the front cover at a stretch, the front lid moves to the third position, so you do not use the auxiliary optical system. It has excellent operability.

[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 a first technical example related to the present invention is opened.

FIG. 5 is a perspective view showing a filter mounted state of a first technical example related to the present invention.

6 (a) and 6 (b) are explanatory views showing a mounting / dismounting state of the filter in the first technical example of FIG. 4, where (a) shows a state in which the front lid is closed, and (b) shows a state in which the front lid is opened. FIG. 6C is an explanatory diagram showing that the filter is moving, and FIG. 8D is a diagram 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 a second technical example related to the present invention is closed.

FIG. 8 is a plan view showing a state in which a front lid of a second technical example related to the present invention is opened.

FIG. 9 is a plan view showing a mounted state of a filter of a second technical example related to 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 (2)

(57) [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. A front lid that takes a third position that retracts further from the front side of the taking lens than the second position in the stroke, and is supported so as to be movable in a plane orthogonal to the optical axis of the taking lens, and takes an image of the auxiliary optical system. An auxiliary optical system holding member that takes an insertion position for inserting the lens into the optical path and a separation position for separating the taking lens from the optical path, and the front lid and the auxiliary optical system holding member are interlocked, and the front lid is When the auxiliary optical system holding member is in the first position and the third position, the auxiliary optical system holding member is positioned in the detached position, and when the front lid is in the second position, the auxiliary optical system holding member is placed in the insertion position. The auxiliary optical system to the optical path of the taking lens. Camera auxiliary optical switching apparatus characterized by having an interlocking means for insertion into. 2. The auxiliary optical system switching device for a camera according to claim 1, wherein the auxiliary optical system is a filter.