JPH09211570A - Pop-up type flashing device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To forcedly close a light emitting part, case with the energizing force of a toggle spring by providing a forcedly popping up means interfering with the light emitting part case, to push up a stroke in a pop-up direction. SOLUTION: When the drive control of a motor 65 is executed with a signal from an AE functional part incorporated in a body, the drive of the motor 65 is transmitted to a cam 62 with a drive transmission means and further, a pop-up shaft 61 is moved up by the movement of the cam 62, to interfere with the light emitting part, case 45. Thus, when the case 45 is turned around a hinge shaft 44 and exceeds the nodal point of a snap action spring 57, the case 45 is popped up. Since a restraining means for the case 45 is not fitted, the case 45 can be manually pulled up regardless of the drive control of the motor 65, to enable popping up. Further, at the time of closing, a manual closing operation, that is, the operation of pushing the case 45 downward is executed, so that when the case 45 exceeds the nodal point, the case 45 is housed at a nonuse position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flash device for a camera provided with means for popping up upon operation, and more particularly,
The present invention relates to a pop-up flash device for a camera, which is an improvement of the pop-up means.

[0002]

2. Description of the Related Art A so-called pop-up type flash device that pops up and emits strobe light during operation is one that uses a method of vertically moving up along a guide provided on the outer surface of the camera body, or the body when not in use. Known is a type that is folded inward and is rotated around a hinge to expose a light emitting surface during operation.

Among them, in the case of a flash device that pops up by vertical movement, it is biased by a spring in a direction to move the light emitting part upward, and when not in use, its position is held by a locking means at a storage position, The light emitting portion is configured to pop up by the biasing force of the spring when the lock is released.

As a flash device that pivots around a hinge and pops up, a light emitting portion is conventionally biased by a spring, and the light emitting portion case is manually pushed up or pushed down against the biasing force of the spring. Then,
It is configured to be in an open posture or a closed posture when it is rotated to a predetermined angle and exceeds a moderation point.

[0005]

However, in the former conventional example, the light emitting portion cannot be popped up unless the light emitting portion is locked by the locking means. For this reason, in the case of unlocking, the light emitting part is automatically popped up based on the signal of the photometry function part.If you want to manually pop up regardless of the operation of the photometry function part, such as during daytime synchronization, A separate flash button is required.

In the case of the latter conventional example, the pop-up operation of the light-emitting portion depends exclusively on the manual operation. As described above, when the pop-up can only be done manually, even if the AE on the camera side determines that the flash light is necessary, the user may not notice it and shoot without popping the flash. Sometimes the subject has low brightness, so the shutter speed is automatically reduced on the camera side,
It may shift the aperture to the open side. Then,
There are many shooting failures such as camera shake and depth of field shallower than intended by the user.

The present invention has been made in order to solve the above-mentioned conventional problems. Although the light emitting portion can be automatically popped up based on the signal from the photometric function portion, a manual pop-up operation can be carried out if necessary. It is an object of the present invention to provide a pop-up flash device for a camera that enables the above-mentioned operation.

[0008]

In order to achieve the above object, the present invention has a light emitting portion case which is rotatable around a hinge in a vertical direction, and the light emitting portion case is set within a certain angle range by a toggle spring. Forced pop-up means is provided for urging the body so as to rotate up and down moderately while interfering with the light-emitting unit case and pushing up the stroke in the pop-up direction.

In the above structure, the compulsory pop-up means includes a pop-up shaft provided in a standing posture below the light emitting unit case, a cam for moving the pop-up shaft upward to a position where the pop-up shaft interferes with the light emitting unit case, and a camera drive system. And a drive transmission mechanism that transmits the driving force of the motor to the cam.

According to the above construction, when the drive of the motor is controlled by the signal from the photometric function built into the body, the drive of the motor is transmitted to the cam via the drive transmission mechanism.
Further, the pop-up shaft moves upward due to the movement of the cam and interferes with the light emitting unit case. As a result, the light emitting unit case rotates around the hinge and pops up when the contact point of the toggle spring is exceeded. Further, since the light emitting unit case locking means is not provided, it is possible to pop up by manually pulling up the light emitting unit case regardless of the drive control of the motor. Further, when the light emitting unit case is closed, that is, by pushing the light emitting unit case downward, when the light emitting unit case is exceeded, the light emitting unit case is stored in the unused position.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a camera finder according to the present invention will be described below with reference to the drawings.
FIG. 1 shows the appearance of a camera incorporating the finder of this embodiment. A camera C shown in this figure is a single-lens reflex camera in which the taking lens L can be replaced and which has an AF function and an AE function.

In FIG. 1A, 1 is a body,
A lens mount 2 for mounting the taking lens L is provided at substantially the center of the body 1, and a film loading chamber, an auto rewinder (neither is shown), etc. are incorporated inside. Further, on the upper surface of the body 1, a shutter button 3, a flash device 4 for strobe emission, and the like are provided. A power battery for supplying power to the drive system of the camera C, the display system, the photometric system, etc. is housed in the body 1.

As shown in FIG. 1B, on the back side of the body 1, an eyepiece window 5 of a finder and a large display LCD.
6 are provided. The eyepiece window 5 faces a position biased to the other end side of the body 1. By unevenly distributing the eyepiece window 5 in this way, it is possible to avoid the body 1 from interfering with the protrusion of the user's nose or the like when looking into the eyepiece window 5 as much as possible, and the shutter arranged on one end side By being located opposite to the button 3, the operability of the shutter button 3 while looking through the eyepiece window 5 is improved.

FIG. 2 shows the internal structure of the body 1.
As shown in this figure, the optical system of the camera C is composed of a main optical system that guides a subject image from the taking lens L to the film surface 7 as shown by the optical path AX, and a half mirror of the main optical system as shown by the optical path AXf. Flip-up type main mirror 8 and focusing screen 9
Viewfinder optical system that guides the subject image to the eyepiece window 5 via
As shown by an optical path AXa, an AF optical system that branches from the main mirror 8 to automatically adjust the focus of the subject image, and an AE optical system that branches from the viewfinder optical system to measure the subject image and perform automatic exposure adjustment (not shown). No)).

The AF optical system includes an AF half mirror 10 arranged behind the main mirror 8, an AF sensor module 12 including a mirror 11 and a CCD arranged below the half mirror 10.
And the subject image transmitted through the main mirror 8 is A
It is guided to the AF sensor module 12 through the F half mirror 10 and the mirror 11, and the module 12 performs focus detection. The AE optical system (not shown) is composed of a photometric lens, a photometric element, and the like, and the light amount of the subject image is measured by the photometric element.

The viewfinder optical system is constituted by a relay optical system because the eyepiece window 5 is largely separated from the taking lens L not only in the depth direction of the camera C but also in the lateral direction. FIG. 3 shows a cross section along the optical axis of the finder optical system. In this figure, 13 is a finder holder as a finder frame, and this finder holder 13 is incorporated between the eyepiece window 5 from a position above the focusing screen 9 in the body 1, and a plurality of brackets 14 are provided in the peripheral portion. It is provided and fixed to the body 1 via these brackets 14.

Inside the finder holder 13, the first mirror 15 and the first mirror 15 which are arranged to face each other above the main mirror 8 and the focusing screen 9 which is arranged substantially horizontally and are inclined at 45 °. A second mirror 16 that is arranged to face in the horizontal direction and is inclined at a predetermined angle, and a third mirror 17 that is arranged to face the second mirror 16 in the horizontal direction and is arranged in parallel with the second mirror 16 are incorporated. The finder optical path AXf which is incident from the taking lens 2 and is turned back upward by the main mirror 8 is further turned back in a Z shape by the first to third mirrors 15 to 17 and is then connected to the eyepiece window 5.
It is led to.

Between the second mirror 16 and the third mirror 17,
First to third lenses 18 to 20 forming a relay lens group
Also, the diaphragm 21 is incorporated in the relay lens holder 22, which is configured as a separate component from the finder holder 13, in a state of being unitized and held. Further, a fourth lens 23, which is a condenser lens, is incorporated in the end portion near the eyepiece window 5 side.

Further, a diopter adjusting mechanism 24 is interposed between the eyepiece window 5 and the end of the finder holder 13 in which the fourth lens 23 is fitted. This diopter adjustment mechanism 24
Is the sixth lens 26 that faces the fifth lens 25 to the eyepiece window 5.
The diopter is adjusted by moving the lens in the optical axis direction with respect to the sixth lens holder 27 formed in a cylindrical frame shape.
The horizontal guide shafts 28 are installed on both sides of the
8 is slidably fitted to both side guide cylinders 29a of the fifth lens holder 29. Further, one guide cylinder 29a is provided with a rack gear 30 and one horizontal guide shaft 28 is provided with a spring 31. 5th lens holder 2
9 is biased toward the sixth lens 26 side, and the rack gear 30 is meshed with the output gear 32 provided at the drive end of the diopter adjustment mechanism 24.

In the finder optical system having such a structure, the subject image incident from the taking lens L is the optical path A in FIG.
As indicated by X, the light is reflected by the main mirror 8 to form an image on the focusing screen 9 which is the primary image plane. The image on the primary image plane is composed of the first mirror 15, the second mirror 16, and the first to the first groups of relay lenses.
The third mirror 1 via the third lenses 18 to 20 and the diaphragm 21.
After 7, the image is formed on the secondary image plane B set between the third lens 20 and the fourth lens 23. Further, the image on the secondary image plane B is guided to the eyepiece window 5 via the fourth lens 23 which is a condenser lens, the fifth lens 25 and the sixth lens 26 which are diopter adjusting lenses.

When the photographer performs a diopter adjustment operation using an operation unit (not shown), the driving force generated by the operation is transmitted to the rack gear 30 via the output gear 32 and the fifth lens holder 29 causes the spring 31 to move. By moving horizontally on the guide shaft 28 against the urging force of, the diopter is adjusted arbitrarily.

Further, as described above, the secondary image plane B is arranged in the space S surrounded by the relay lens holder 22, the third mirror 17 and the fourth lens 23 for the following reason. That is, if dust or the like is attached to the secondary image plane B on which the subject image is formed, the dust is captured within the field of view seen from the eyepiece window 5 and interferes with photographing. It is desirable to place it in an enclosed space where dust does not enter as much as possible. Therefore, in the present embodiment, the relay lens holder 22 can be incorporated in the finder holder 13 in a sealed state, and the space S is a sealed space,
The secondary image plane B is arranged there.

By the way, the first to third mirrors 15 to 17 mounted in the finder holder 13 and the lens group 18
Nos. 20 to 23 have high error sensitivity, but among them, the first to third lenses 18 to 20 constituting the relay lens group
Strict precision is required for the distance between lens surfaces and parallelism. In order to meet such a demand, in the present embodiment, the first to third mirrors 15 to 17 and the fourth lens 2
3 is integrally attached to the finder holder 13, the first to third lenses 18 to 20 are integrally attached to a single relay lens holder 22, and the relay lens holder 22 is attached to a predetermined position in the finder holder 13. I am trying to incorporate it in.

That is, in order to attach the three lenses 18 to 20 constituting the relay lens group to the same frame body in the same form as much as possible, these three lenses 18 to 20 are a single relay lens. It is attached integrally to the holder 22 to maintain the distance between the lenses and the parallelism.

Therefore, the relay lens holder 22 is
The mounting portion 22a of the diaphragm 21 and the mounting portion 22 of the second lens 19
b, the mounting portion 22c of the third lens 20 is formed in a step portion having a contact surface that is perpendicular to the optical axis direction, and the third lens 20 is fitted in the optical axis direction from the third mirror 17 side. Then, it is brought into close contact with the contact surface of the third lens mounting portion 22c. Further, the diaphragm 21 is fitted to the contact surface of the diaphragm mounting portion 22a, and the second lens 19 is fitted in the optical axis direction from the second mirror 16 side to be brought into close contact with the contact surface of the second lens mounting portion 22b. The first lens 18 is brought into contact with 19 to attach it to the relay lens holder 22.

Then, after fixing these lenses 18 to 20 to the relay lens holder 22, the relay lens holder 22 is a separate frame of the finder holder 13.
The second mirror 16 and the third mirror 17 are attached to the attachment portion 13a at the intermediate portion. The mounting portion 13a of the finder holder 13 is formed with a convex shape having a shape matching the groove shape provided on the outer circumference of the relay lens holder 22, and the groove shape should be fitted along the convex shape. Thus, the relay lens holder 22 is mounted in a state of being positioned at a predetermined position of the finder holder 13.

Similarly, the fourth lens 23 is attached by being fitted from the outside into a step portion formed in the eyepiece window 5 side opening 13b of the finder holder 13, and the second mirror 16 and the third mirror 17 are also attached to the finder holder 13. Steps 33a, 34 of the mirror mounting windows 33, 34 provided in the facing portion
It is attached by being fitted into a from the outside.

FIG. 4 shows another aspect of the finder optical system. In the structure shown in this figure, the relay lens holder 22 is formed separately from the finder holder 13.
Unlike the embodiment of FIG. 3 in which the lens groups 18 to 20 are incorporated in the lens group, the mounting portions 33 to 35 of the first to third lenses 18 to 20 are integrally formed at a predetermined portion of the finder holder 13. First to third lenses 1 in the parts 33 to 35
8 to 20 are fitted from the optical axis direction.

In this structure, the first to third parts having high error sensitivity
The mirrors 18 to 20, the fourth lens 23, which is a condenser lens, and the first to third mirrors 15 to 17 are integrally held by the finder holder 13. Since the other configurations are common to those shown in FIG. 3, common parts are denoted by common reference numerals and the description thereof will be omitted.

FIG. 5 shows still another mode of the finder optical system. The one shown in this figure is applied to a viewfinder in a mode in which the diopter adjustment mechanism 24 is not provided, and the mounting portions 33 to 33 of the first to third lenses 18 to 20.
35 is integrally formed at a predetermined portion of the finder holder 13, and the first to third lenses 18 to 20 are fitted in the lens mounting portions 33 to 35 from the optical axis direction, and the fifth lens 25, 6 Lens 26 mounting portions 36, 3
7 is also integrally formed in the same finder holder 13,
The mounting portions 36 and 37 are composed of a step portion having a contact surface orthogonal to the optical axis direction, and the fifth and sixth lenses 25 and 26 are formed.
Are respectively fitted in the optical axis direction.

In this configuration, the first to third parts having high error sensitivity
In addition to the mirrors 18 to 20 and the fourth lens 23 which is a condenser lens, the fifth and sixth lenses 25 and 26, and the first lens
The third mirrors 15 to 17 are integrally held by the finder holder 13. Other configurations are shown in FIG.
Since it is common to that shown in FIG. 4, common parts are given common reference numerals and their explanations are omitted.

In the mounting structure of the relay lens group as described above, the finder holder 13 supports the first to third lenses 18 to 20 constituting the relay lens group along the optical axis direction of the optical system. Since it is formed in a shape capable of holding the position, it is possible to secure the accuracy of the lens interval and parallelism. Further, since there is no separate member for holding each lens, such as a conventional holding frame, the number of parts is reduced and the error factor is reduced.

In the above structure, as shown in FIG. 6A, the finder holder 13 is formed in a shape along the optical path in order to form an optical path bent in the Z shape in the finder optical system. 2. The optical path wall portions 38a and 38b along the optical path connecting the third and third mirrors 16 and 17 are oblique to the mirror mounting windows 33 and 34.

In this case, when molding the mirror mounting portion of the finder holder 13, as shown in FIG.
Prepare slide cores 39a and 39b as punching dies that are not parallel to the optical path wall portions 38a and 38b but are punched in a direction perpendicular to the mirror surfaces at both ends thereof. The slide cores 39a and 39b are prepared. When the mirror mounting windows 33, 34 and the step portions 33a, 34a are molded by
As shown in an enlarged view in FIG. 6B, the window forming portion affects the outermost optical path of the Z type optical path. That is, the mirror mounting window 33,
When 34 is formed, the end portions of the optical path wall portions 38a and 38b become thinner than the other portions, so that it is necessary to increase the thickness of the optical path wall portions 38a and 38b in order to maintain the strength.

Therefore, in this embodiment, as shown in FIG. 7C, the slide cores 39a, 3 for forming the mirror mounting window are formed.
9b is non-perpendicular to the reflecting surfaces of the second and third mirrors 16 and 17, and is the first to third relay lens groups.
The lenses 18 to 20 are formed so as to be die-cut along the optical axis direction. Slide core 3
By configuring 9a and 39b so that they can be pulled out straight along the optical axis direction, as shown in FIG. 7 (A), the peripheral surfaces of the mirror mounting windows 33 and 34 of the finder holder 13 reach the end. Even if the thickness is uniform, the wall surface does not interfere with the outermost optical path. Therefore, as shown in an enlarged view in FIG. 7B, the finder holder 13 can be made thin and the size can be reduced.

Further, as shown in FIG. 8 (A), first to third
In the case where the mounting portions 33 to 35 of the lenses 18 to 20 are integrally formed at a predetermined portion of the finder holder 13,
A slide core 39a for molding the mirror mounting window 33 of the mirror 16 and a slide core 39b for molding the mirror mounting window 34 of the third mirror 17 are provided facing each other, and at the time of molding the finder holder 13. If the end faces of the second and third mirrors 16 and 17 are abutted against each other, the accuracy of the spacing and parallelism between the reflecting surfaces of the second and third mirrors 16 and 17 can be stabilized. Further, the mounting portions of the first to third lenses 18 to 20 constituting the relay lens group can also be molded at the same time, and the accuracy of the intervals and parallelism can be made stable.

The outer shape of the finder holder 13 is molded by a known split mold mainly composed of a fixed mold and a movable mold which is brought into contact with and separated from the fixed mold.
Further, the slide cores 39a, 39b are made to interlock with the main split mold by a pin provided obliquely outside the drawing.

As shown in FIGS. 1, 2 and 9 to 11, since the first mirror 15 is disposed above the focusing screen in a state of being inclined by 45 °, the first mirror 15 and the body 1 are arranged.
A triangular space 41 is formed between the upper surface of the outer cover 40 and the upper surface of the outer cover 40. Although this upper surface side space portion 41 becomes a dead space, in the present embodiment, the above-mentioned pop-up flash device 4 is incorporated by utilizing this upper surface side space portion 41.

Since the first mirror 15 is arranged in the center of the front surface of the body 1, the flash unit 4 is viewed from the front.
It is located directly above the taking lens L. Therefore, in photographing a person or the like using the flash device 4, there is an advantage that a background of a person or the like as a subject is less likely to be shaded, but when the position of the light emitting surface 42 of the flash device 4 is low, the photographing lens L is formed. Are close to each other, which may cause a red-eye phenomenon. In order to prevent this red-eye phenomenon, it is essential that the flash unit 4 be arranged apart from the taking lens L.

In the pop-up type flash device 4, in the pop-up state, the light emitting surface 42 is in the height direction and the photographing lens L
In addition to being sufficiently separated from the camera, it is folded and housed in the body 1 when not in use, which is effective for downsizing the camera. Further, since the light emitting surface 42 is not exposed when it is not used, there is an advantage that a sense of quality is imparted.

Further, the second mirror 16 is the first mirror 15
From the relationship that is horizontally inclined with respect to
The outer cover 40 of the body 1 is also arranged so as to be inclined with respect to the back surface thereof. Therefore, a triangular space 43 is formed between the mirror 16 behind the second mirror 16 and the back surface of the exterior cover 40. In the present embodiment, FIG.
As shown in FIG. 1, a hinge shaft 44, which serves as a rotation fulcrum of the flash device 4, is arranged in the rear space 43.

That is, the hinge shaft 44 is provided in a portion close to the top surface which is the back surface of the light emitting unit case upper surface 45a, and the hinge shaft 44 is arranged in the rear side space 43. ing. Further, the light emitting unit case 45 of the flash unit 4 is folded and the upper space portion 41
The upper surface portion 45a is formed in a shape that is substantially continuous with the upper surface portion of the exterior cover 40 so as to be substantially flush with the outer surface of the body 1 when housed inside.

In this way, the pop-up type flash device 4 is incorporated into the finder holder 1 in which the relay optical system is incorporated.
The upper surface side space portion 41 and the rear surface side space portion 43 as a dead space of 3 are incorporated, and the upper surface is substantially flush with the upper surface of the exterior cover 40 of the body 1 when folded in the body 1. By forming such a structure, it is possible to greatly contribute to downsizing and downsizing of the camera, and moreover, it is possible to make the handleability excellent.

12 to 14 show an example of a mounting structure of the hinge shaft 44. As shown in FIG. 12, the light emitting unit case 45 includes an upper case 46 that constitutes an upper surface portion 45a.
And a lower case 47 to which the hinge shaft 44 is attached. A shaft hole 48 is formed in both walls at the base end portion of the lower case 47, and the hinge shaft 44 is inserted through these shaft holes 48, whereby the light emitting unit case 45 is inserted.
Is rotatably supported about a hinge shaft 44.

As shown in FIG. 13, the hinge shaft 44 has a half-moon shaped flat portion 44a formed by cutting out a part of a round bar at one end thereof. Further, as shown in FIGS. 14A and 14B, a shaft insertion hole 50 is formed in the mounting wall surface 49 of the body 1, and the radius of the hinge shaft flat portion 44a is formed behind the mounting wall surface 49. The fixing member 51 provided with the notch groove 51a having substantially the same depth as the above is arranged. Then, in the hinge shaft 44, the flat portion 44a is inserted into the shaft insertion hole 50 of the mounting wall surface 49 and fitted into the cutout groove 51a of the fixing member 51,
The pressing member 52 is superposed on the flat portion 44a, and the pressing member 52 and the fixing member 51 are fastened with the screw 53, whereby the pressing member 52 and the fixing member 51 are fixed to the body 1 side in a rotation-restricted state.

As the rotation restricting means of the hinge shaft 44, in addition to the above, for example, a hinge shaft rotation restricting member such as a pin or a plate fixed to the body 1 side is prepared, and the hinge shaft 44 having a round shaft shape is provided. Various kinds of modes can be applied, such as providing an engaging portion such as a split groove or a pin hole for engaging the rotation restricting member at the end and engaging the rotation restricting member with the engaging portion. .

Returning to FIG. 12, a pop-up spring 54, which is a coil spring, is attached to a portion of the hinge shaft 44 passing through the lower case 47. In the pop-up spring 54, one foot 54a is in contact with the top surface of the upper case 46, and the other foot 54b is bent,
The hinge shaft 44 is attached to the flat portion 44a of the hinge shaft 44 in a locked state. According to such a mounting structure of the light emitting unit case 45, since the scaffolding of the pop-up spring 54 is provided on the hinge shaft 44 itself, there is no need to provide the through hole, which is conventionally required, in the light emitting unit case 45, and dust prevention, It is advantageous for drip-proof.

Also, as shown in FIG. 15, if a hinge shaft having a lead wire insertion hole 55 penetrating in the axial direction is used, the lead wire 56 can be passed through the hinge shaft 44, and the flash device can be inserted. It is possible to make the structure advantageous for wiring of the lead wire of No. 4 and the like.

FIG. 16 shows an example of the pop-up mechanism of the flash unit 4. This pop-up mechanism can be manually operated when folded and can be selected automatically or manually when popped up. Two locking shafts 58 and 59 are provided on one side surface of the light-emitting unit case 45. A snap action spring 57, which is a toggle spring, is mounted between the locking shafts 58 and 59, and the snap action spring 57 causes the light emitting unit case 45 to be turned up and down around the hinge shaft 44 within a certain angle range. It is urged to move. The snap action spring 57 in this example is different from the pop-up spring 54 shown in FIG.

On the other hand, below the light emitting unit case 45, there is provided a forced pop-up mechanism which interferes with the case 45 and pushes up the stroke in the pop-up direction. In this forced pop-up mechanism, a guide member 60 in a standing posture is provided below the light emitting unit case 45, and a pop-up shaft 61 is provided on the guide member 60 so as to be vertically movable. Also,
The pop-up shaft 61 is configured to be vertically driven by a three-dimensional cam 62, and a gear 63 integrally formed with the three-dimensional cam 62 is attached to, for example, the body 1 via an intermediate gear group 64 as a drive transmission mechanism. It is linked with a built-in film winding motor 65.

The operation of the forced pop-up mechanism having such a configuration is controlled based on a signal from an automatic photometry (AE) function section (not shown). That is, when the shutter button 3 is pressed, the AE function unit starts photometry, detects the light amount of the subject image, and sends the detection signal to a control unit (not shown) configured by a microcomputer or the like.

When the control unit determines that the subject image is dark and the required exposure cannot be obtained based on the light amount detection signal, the control unit switches the output of the film winding motor 65 to the flash pop-up side drive transmission mechanism. As a result, the driving force of the motor 65 is transmitted to the three-dimensional cam 62 via the intermediate gear group 64 and the gear 63, and the three-dimensional cam 62 is rotationally driven to move the pop-up shaft 61 to the light emitting unit case 4.
Move it up to the position where it interferes with 5. As a result, the light-emitting part case 45 rotates around the hinge, and when the snap-action spring 57 exceeds the detent point, the light-emitting part case 45 automatically pops up.

Further, unlike the conventional case, since the light emitting unit case 45 is not provided with a locking means, it is possible to manually pull up the light emitting unit case 45 to pop it up regardless of the drive control of the motor 65. This is convenient when performing daytime sync photography and the like. Furthermore, when closing, the folding operation is performed manually, that is, the light emitting unit case 45.
When the snap action spring 57 exceeds the moderation point by pushing downward, the snap action spring 57 is housed in the body 1.

FIG. 17 shows another example of the pop-up mechanism of the flash unit 4. This pop-up mechanism is
Both the folding storage and the pop-up are automatically performed. The light-emitting unit case 45 is always urged in the pop-up direction by the same structure as the pop-up spring 54 shown in FIG. While a hook-shaped engaging portion 66 is provided on one side surface, an actuated member 68 having an L-shaped cutout groove 68a on a rotating shaft 67 extending from the body 1 side, and an engaging portion engaging with the engaging portion 66. The lever 69 and the lever 69 are attached so as to rotate together, and further, below the actuated member 68, there is provided an unlocking mechanism having the same structure as the pop-up mechanism shown in FIG. Also,
The rotating shaft 67 is a spring 70 that engages with the actuated member 68.
Is urged in the same direction as the light emitting unit case 45.

The unlocking mechanism is provided with a guide member 71 in an upright posture below the actuated member 68.
A pop-up shaft 72 is vertically movable. Also, this pop-up shaft 72 is attached to the solid cam 7
3 is configured to be driven in the vertical direction, and further,
A gear 74 integrally formed with the three-dimensional cam 73 is interlocked with a film winding motor 65 built in the body 1 through an intermediate gear group 75 as a drive transmission mechanism.

The lock releasing mechanism having such a structure is controlled in operation based on a signal from the AE function section. That is, AE
When the light amount of the subject image detected by the functional unit is smaller than the predetermined amount, the output of the film winding motor 65 is switched to the flash pop-up side drive transmission mechanism. As a result, the driving force of the motor 65 is increased by the intermediate gear group 75, the gear 7
4 is transmitted to the three-dimensional cam 73 and the three-dimensional cam 73 is rotationally driven to move the pop-up shaft 72 upward to a position where the pop-up shaft 72 interferes with the cutout groove 68a of the operated member 68. As a result, the engagement between the locking lever 69 and the locking portion 66 of the light emitting unit case 45 is released, and the light emitting unit case 45 is rotated about the hinge shaft 44 by the urging force of the pop-up spring 54 to automatically pop up. To be done. Further, when the light emitting unit case 45 is popped up to the upper end set position, it hits the exterior cover 40 and stops.

When the flash unit 4 is folded and stored, the pop-up shaft 72 moves downward following the rotation of the three-dimensional cam 73 contrary to the above, whereby both the light emitting unit case 45 and the locking lever 69 are moved. Spring 5
When the light emitting unit case 45 is folded by rotating the light emitting unit cases 45 by the urging forces of 4, 70, the locking unit 6
The locking lever 69 is engaged with 6 to maintain the closed posture.

As described above, the light emitting unit case 45 is connected to the motor 6
Since the pop-up is caused by being unlocked by the lock releasing means that is interlocked with the movement of 5, the pop-up can be arbitrarily performed by driving the motor 65 by an appropriate method. As the motor, a zoom motor of the taking lens L may be used instead of the film winding motor.

Although not shown, in the present embodiment, the photometric element forming the AE function section is integrally attached to the relay lens holder 22. That is, a prism (not shown) that guides the light of a subject image to a photometric system is provided below the optical axis of the focusing screen 9 via the first and second mirrors 15 and 16, and is bent by about 90 °. A photometric element is arranged on the relay lens holder 22 corresponding to the above. By doing so, the photometric element can also be arranged in the extra space between the relay lens holder 22 and the exterior cover of the body 1, and the space efficiency can be improved.

Returning to FIG. 1 (B) and FIG. 2, the display LCD
6 is arranged on the back side of the body 1 close to the eyepiece window 5, but this is because the eyepiece window 5 can be unevenly distributed to the side of the body 1 by providing the relay finder. As a result, the large-sized display LCD 6 can be arranged substantially in the center on the back side of the body 1, and its visibility can be improved. Reference numeral 76 is an operating portion arranged below the display LCD 6, and reference numeral 77 is a lid for covering the operating portion 76 when not in use. Further, reference numeral 78 denotes a flexible substrate arranged on the back surface side of the operation unit 76.

[0061]

As described above, according to claim 1 of the present invention, there is provided a light emitting portion case which is rotatable around the hinge in the vertical direction, and the light emitting portion case is set within a certain angle range by the toggle spring. While it is urged to rotate up and down moderately, a forced pop-up means that interferes with the light-emitting unit case and pushes up the stroke in the pop-up direction is provided. Forced to close.

Therefore, since it is not necessary to provide a locking means for holding the light emitting unit case in the closed posture, the light emitting unit case can be manually pulled up regardless of the drive control of the motor to perform daytime synchronization. You can make it pop up as desired. Therefore, the forced light emission button, which is conventionally required, becomes unnecessary. Moreover, the light emitting unit case can be automatically popped up by the operation of the forced pop-up means.

According to a second aspect of the present invention, a pop-up shaft provided in a standing posture below the light emitting unit case, a cam for moving the pop-up shaft up to a position where the pop-up shaft interferes with the light emitting unit case, and a motor for a camera drive system. Since the compulsory pop-up mechanism is configured by the drive transmission mechanism that transmits the driving force of the above to the cam, the motor is drive-controlled based on the signal of the photometry function section, so that the light emitting section pops up automatically. You can

[Brief description of drawings]

1A and 1B are external views of a camera incorporating a finder according to an embodiment of the present invention, where FIG. 1A is an exploded perspective view of a taking lens and a body, and FIG. .

FIG. 2 is a vertical sectional side view showing the internal structure of the body.

FIG. 3 is a cross-sectional view taken along the optical axis showing the finder optical system.

FIG. 4 is a cross-sectional view taken along the optical axis showing another aspect of the finder optical system.

FIG. 5 is a transverse cross-sectional view taken along the optical axis showing a further aspect of the finder optical system.

6A and 6B show inconvenient molding examples of a finder optical system, FIG. 6A is a sectional view of the optical system, FIG. 6B is an enlarged view of a main part, and FIG.
FIG. 3 is a cross-sectional view showing a finder holder and a slide core for molding the finder holder.

FIG. 7 shows a molding example of a finder optical system, (A) is a sectional view of the optical system, (B) is an enlarged view of a main part, and (C) is a sectional view showing a finder holder and a slide core for molding thereof.

FIG. 8 shows another molding example of the finder optical system,
(A) is a sectional view of the optical system, and (B) is a sectional view showing a finder holder and its molding slide core.

FIG. 9 is a plan view schematically showing a positional relationship between a pop-up flash device and a finder holder.

FIG. 10 is an external perspective view showing the positional relationship between the first mirror and the flash unit.

FIG. 11 is an external perspective view of a main part showing the positional relationship between the second mirror and the hinge shaft of the flash device.

FIG. 12 is an exploded perspective view of a main part showing a pivot structure of a light emitting unit case by a hinge shaft.

FIG. 13 is a perspective view showing an example of a hinge shaft.

14A and 14B show a rotation restricting structure of a hinge shaft, in which FIG. 14A is a vertical sectional side view of a main part, and FIG.

FIG. 15 is a sectional view showing another example of the hinge shaft.

FIG. 16 is a schematic perspective view showing an example of a pop-up mechanism of a flash device.

FIG. 17 is a schematic perspective view showing another example of the pop-up mechanism of the flash device.

[Explanation of symbols]

1 Body 3 Shutter Button 4 Pop-up Flash Device 5 Eyepiece Window 6 Display LCD 8 Main Mirror 9 Focus Plate 13 Finder Holder 15 First Mirror 16 Second
Mirror 17 third mirror 18 first
Lens 19 Second lens 20 Third
Lens 22 Relay lens holder 23 4th
Lens 24 Diopter adjustment mechanism 25 Fifth
Lens 26 sixth lens 27 sixth
Lens holder 29 Fifth lens holder 33 Mirror mounting window 33a Step portion 34 Mirror mounting window 34a Step portion 35 Mirror mounting portion 36 Fifth lens mounting portion 37 Sixth
Lens mounting portion 38a Optical path wall portion 38b Optical path wall portion 39 Slide core 40 Exterior cover 41 Upper surface side space portion 42 Light emitting surface 43 Rear surface space portion 44 Hinge shaft 45 Light emitting portion case 54 Pop-up spring 55 Lead wire insertion hole 56 Lead wire 57 Snap action spring 61 Pop-up shaft 62 Solid cam 63 Gear 64 Intermediate gear group 65 Film winding motor 66 Locking part 67 Rotating shaft 68 Actuated part 69 Locking lever 70 Spring 72 Pop-up shaft 73 Solid cam 74 Gear 75 Intermediate gear group 66 Engagement part 67 Rotation shaft 68 Actuated part 69 Engagement lever 70 Spring B Secondary image plane C Camera L Photographic lens S Sealed space

Claims (2)

[Claims] 1. A light emitting unit case is provided which is rotatable around a hinge in a vertical direction, and the light emitting unit case is urged by a toggle spring so that the light emitting unit case can be vertically rotated within a certain angle range. A pop-up flash device for a camera, which is provided with a compulsory pop-up means that pushes up a stroke in a pop-up direction by interfering with a case of a light emitting unit. 2. The forced pop-up means includes a pop-up shaft provided in a standing posture below a light-emitting unit case, a cam for moving the pop-up shaft up to a position where the pop-up shaft interferes with the light-emitting unit case, and a camera drive system motor. The pop-up flash device for a camera according to claim 1, wherein the pop-up flash device for a camera is configured by a drive transmission mechanism that transmits the driving force of the above to the cam.