JPS6269249A - Flash device incorporated camera - Google Patents

Abstract

PURPOSE:To securely store a light emission part at the end of photography and to facilitate operation by driving a light emission part to a close position associatively when a photographic lens is driven to the close position. CONSTITUTION:When a lens barrel block 4 is moves and stored, a flash device driving lever 5 rotates clockwise around a fulcrum A1. This motion allows the tip gear 5b of the lever 5 to drive a rack 6 downward, so the projection part 6a of the rack 6 drives the flash device block 7c downward while engaging the arm 7b of the flash device block 7c, which is moved to a storage position (close position) nearby the optical axis of the lens.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention provides a built-in flash device in which at least a part of the lens system can take two positions: a lens-proximate position close to an imaging surface and a lens remote position remote from the imaging surface. It's about cameras.

(Background of the Invention) Conventionally, when using a camera, the photographic lens is moved to a remote position away from the imaging surface, and when the camera is used, the photographing lens is moved to a close position close to the imaging surface. In a so-called retractable camera, the photographic lens is composed of a master lens and a converge lens, and the first lens is used only with the master lens.
The second focal length is obtained by moving the master lens along the optical axis a predetermined amount away from the imaging surface, and then placing a conversion lens behind the master lens to obtain a second focal length. Bifocal cameras are known.

On the other hand, compact lens-shutter cameras with built-in flash devices have been known for some time. The light emitting section of the flash device in this type of combat camera is movable between a near position close to the lens optical axis and a far position away from the lens optical axis.

In conventional retractable cameras and conventional bifocal cameras with built-in flash devices, the movement of the photographic lens and the movement of the light emitting part are operated separately, which makes the operation complicated and makes it difficult to finish shooting. Sometimes I forget to store the photographic lens when I'm in the dark.

Furthermore, the configuration was complicated because operating members for the photographic lens and the light emitting section had to be provided respectively.

In addition, in a sunken 11 camera that is configured to be unable to emit light near the light emitting part, capable of emitting light at a distance 1 L, and to be constantly charged, undesired charging may occur if the light emitting part is located far away when the camera is in use. There is also the problem that the battery is easily consumed.

In addition, ■ - In the bifocal camera mentioned above, when taking pictures using only the master lens (wide-angle shooting), and when taking pictures using the conversion lens (telephoto shooting)
It is better to use the light emitting part closer to the optical axis than in other cases.
ff It's adorable. However, in a conventional bifocal camera of this type, the focus switching movement f'+ of the photographing lens and the movement of the light emitting unit between the two positions described above are linked. Therefore, during wide-angle photography, the light-emitting section may emit light using a device that is located far from the optical axis, and good photographic results may not be obtained.

(Objective of the Invention) The second objective of the present invention is to solve these problems,
It is an object of the present invention to provide a camera with a built-in flash device in which the driving of a photographic lens and the driving of a light emitting part are linked in an appropriate relationship.

(Summary of the invention) The uninvented object is the entire or at least part of the photographic lens.
The /lens system is held in two positions by the 1/lens drive stage, a lens close position close to the imaging surface and a lens remote position remote from the imaging surface, and the light emitting part of the flash device is
Applies to cameras that are movable between a proximal position (δ close to the optical axis of the taking lens) and a distal position far from the optical axis of its lens;
The feature is that the flash device drive L stage is configured to work in conjunction with the lens driving means to drive the light emitting section to the close position when the photographing lens is driven to the close position.

(Embodiment) FIG. 1 shows an embodiment of the present invention. In this embodiment, the photographing lens can be retracted to a lens-proximate position close to the film surface, and can be extended to a remote position away from the film surface.
This is an application of an uninvented technology to the so-called sink +1-1 type camera.

A substrate l fixed to a camera body (not shown) has a lens barrel (see Fig. 2 (a) and (b)) on which a photographic lens is mounted.
A hole 111a larger than the outside diameter of 2 (indicated by a two-dot chain line) is drilled, and the other ends of the holes 3a and 3b are fixed to the camera body. There is. The rod 3a is connected to the lens barrel 2. The lens barrel block 4 equipped with a shutter mechanism and a focus adjustment mechanism is passed through the lens barrel block 4, and the rod 3b is inserted into the lens barrel professional.
The lens barrel block 4 moves the rods 3a and 3bj back and forth along the optical axis to move the lens toward and away from the film surface. A bin 4a) is installed from the side wall of the lens barrel block 4, and the bin 4a holds the camera body. ', l.

The tip fork 5a of the flash device drive lever 5, which is rotated around Al at the 11th position and the 7th position, is engaged. A gear 5b is formed at the other end of the lever 5, and the gear 5b meshes with a rack 6 provided in the sliding opening 1 of the camera body. Reference numeral 7 designates a flash device, and a flash device block 7C having a light-emitting section inside is mounted on the right side, and a sliding plate 7a supported by a slide II is mounted on the camera body. (The arm 7b protruding from the platform plate 7a extends between the protrusions 6a and 6b protruding from the rack 6, and the compression spring 8 is inserted between the arm 7b and the protrusion 6b. Therefore, the arm 7b is pressed and held by the spring 8 and the protrusion 6a, and when the rack 6 moves 1, yl, the flash device block 7C moves through the spring 8.
L. When the rack 6 descends, the flash device block 7C descends while the protrusion 6a pushes the arm 7b in the direction F. Further, the sliding plate 7a is always urged downward by a tension spring 9 which is one minute weaker than the compression spring 8.

In addition, a block drive pin 4b is mounted on the bottom of the lens barrel holder 4, and the pin 4b has a long length formed on a lever 10 that is rotatably attached to the camera body around a fulcrum A2. It is inserted into the hole 10a. That lever
A pin lob is erected at one end of the pin 10b.
is loosely fitted into a groove cam 12 formed on the =L surface of a cam member 11 that is pivotally supported by the camera body and rotatable about a fulcrum A3. On the other hand, a toggle spring 13 is provided between the spring hook 1F pin loc at the other end of the lever 10 and the spring hook I pin 18 of the camera body.

That is, the lever lO moves around the fulcrum A2 as the grooved cam 12 rotates, the lever lO rotates counterclockwise to project the lens barrel block 4, and rotates clockwise to project the lens barrel block 4. While the lens barrel block 4 is stored, the flash device block 7c is moved to f- in conjunction with the protrusion of the lens barrel block 4.
'ylL, each member is configured so that the flash device block 7c is lowered in conjunction with the storage of the lens barrel block 4.

Next, the cam member 11 will be explained.

The cam member 11 has a gear 14 and a grooved cam 12.
4 is meshed with a gear 15 to which rotational force is transmitted from a motor (not shown), and is rotatable in the direction of the arrow.

As shown in FIGS. 2(a) and 2(b), the grooved cam 12 is a substantially elliptical groove extending to the right of the center point eccentric from the rotation center A3 of the force L/11 material 11. Center of rotation A
3, and a lens feeding cam whose curvature gradually decreases as the grooved cam 12 rotates clockwise in the figure, causing the pin lOb to come into contact with the outer inner circumferential surface. It has a groove part 12b which is a surface, and a groove part 12c which is a lens retracting cam surface whose curvature gradually increases when it rotates and the pin 1'Ob comes into contact with the inner circumferential surface on the inside. In the state shown in Fig. 2(a), the lens barrel block 4 is held in the lens storage position, and when rotated from there in the direction of the arrow to the state shown in Fig. 2(b), the lens barrel block 4 is held in the lens protruding position. It turns out.

The position of the lens barrel block 4 is selected by a switching operation of a lens position selection lever 20, which will be described next.

Referring to FIG. 1, a lens position selection lever 20 is slidably attached to a camera body 22, and is constantly urged to the right in the figure by a spring 21. As shown in FIG. This lever 20 is provided with an arm 20b, the tip of which extends to the camera body 22, and a knob 20a is provided there.By operating the knob 20a in the direction of the arrow shown in the figure, the position of the lens position selection lever 20 can be adjusted. It can be switched to the extended position. To switch from the lens extended position to the lens retracted position, the lever 20 may be manually operated in the opposite direction of the arrow. A brush 20c is provided on the arm 20b, and the brush 20c is configured to slide over a pattern formed on the printed circuit board 23.

As shown in FIG.
Book conductor pattern 23a (common pattern).

23b and 23c are formed, and the brush 20c whose [- is indicated by a two-dot chain line is configured to slide. At the lens retracting position PI, the switch Sl consisting of the conductor patterns 23a and 23b is released, and the conductor patterns 23a and The switch S2 consisting of 23c is closed, and the switch S1 is closed at the lens extending position P2, but the switch S2 is closed.
2 is released.

In response to the lens position selection lever 20 being operated from the lens retraction position to the lens extension position, the lens barrel block 4 is moved from the retracted position to the extended position. Hypochondrically detecting switches S3 and S4 switch the first brush 2 as shown in +M.
The brush gear 24 includes a brush gear 24 having a brush gear 4a and a printed circuit board 25 facing the brush gear 24. This gear 24 is meshed with a gear 15 so that it rotates once when the cam member 11 rotates once, and a brush 24 shown in FIG.
a is attached, and conductive patterns 25a to 25c shown in FIG. 4 are formed on the printed circuit board 25, and the pattern 25a
and 25c constitute a switch S3, and patterns 25a and 25b constitute a switch S4. In addition, pattern 2
5a is grounded.

FIG. 4 shows switch S3 in the lens storage position. In this case, the conductor patterns 25a and 25
The switch S4 made up of conductive patterns 25a and 25e is opened, and the switch S3 made up of conductive patterns 25a and 25e is closed. When the cam member 11 rotates by 180 degrees and moves to the lens protruding position where the lens barrel block 4 protrudes from the camera body, the switch S4 is closed and the switch S3 is closed.
will be released.

FIG. 5 shows a block diagram of the motor control system in this embodiment. A motor control section 31 is connected to the motor 30, and power is supplied to the motor 30 from a power source 32 via the motor control section 31. It has become. Motor control section 31
is connected to the motor rotation signal -J generator 33, and the start and stop of the motor 30 is controlled according to the 0 o'clock signal supplied from the generator 33 to the motor control unit 31.

Here, the motor rotation signal generating section 33 has the four switches 81 to S4 described in 1-1, and FIG. 5 shows the case where the lens barrel block 4 is housed.

The operation of the retractable camera configured in this way will be explained below.

(I) When the protruding lens position selection lever 20 of the photographic lens and flash device is operated against the spring 21 to the left in Figure 1, the lever 20 is moved from 4"JH%5 (not shown). The lens is held in the extended position. At this time,
The brush 20e slides on the pattern 231 and the switch S
1 is closed and switch S2 is opened. Now, since the lens is in the retracted position δ and the lens position detection switch S3 is in the closed state, a motor rotation signal is output to the motor control circuit 31 through the switches S1 and S3 in FIG. Start rotating. As the motor 30 rotates, the gear 15 rotates counterclockwise, the cam member 11 rotates clockwise, and the brush gear 24 also rotates clockwise.

When the mechanism member 11 rotates and the groove portion 12b of the grooved cam 12 engages with the bottle 10b, the lever 10 begins to rotate. That is, since the outer inner circumferential surface of the groove portion 12b pushes the bottle 10b, the lever 10 begins to rotate counterclockwise against the toggle spring 13. In conjunction with the movement of the lever 10, the lens barrel block 4 is guided by the rods 3a and 3b and moves forward. When the lens barrel block 4 is further rotated counterclockwise and the toggle spring 13 passes its dead center, the lens barrel block 4 is urged forward by the toggle spring 13, so that the groove 1
The lens barrel block 4 further advances while the bottle lOb slides along the inner peripheral surface inside the lens barrel 2b. Groove cam 12 is 1
When the lens barrel block 4 is rotated by 80 degrees (see I in FIG. 2(b)), the protrusion 4C of the lens barrel block 4 comes into contact with the substrate 1. At this time,
The brush 24a has rotated 180 degrees from the state shown in FIG. 4, and the switch S3 is opened and the switch S4 is closed, thereby deactivating the motor rotation signal and stopping the motor 30. Therefore, the rotation of the cam member 11 and the brush gear 24 also completes one rotation. In this state, the lens barrel Pro i, Ri 4
．． (9) Then, the photographing I/lens is in the protruding position and is biased in the 1111 direction by the toggle spring 13.

When the lens barrel block 4 moves forward in this way, the flash drive lever 5 rotates counterclockwise about the fulcrum AI. This movement causes the end gear 5b of the lever 5 to drive the rack 6 in one direction, so the rack 6 drives the flash device block 7C to the right via the compression spring 8, so that the flash device block 7C drives the lens light. It will move to a protruding position (far position) away from the axis. In addition,
At the protruding position, the light emitting part becomes the light emitting port function for the first time, and the charging becomes 11th and 7th.

(II) When the lens position selection lever 20 held at the storage lens retracted position of the photographic lens and flash device is operated to the right in the figure, the brush 20c slides on the plate 23 and switches S1. is opened and switch S
2 is closed. At this time, due to the lens projecting operation, the brush gear 24 is stopped at a position rotated by 180 degrees from the position yA1 in FIG. 4, and the switch S3 is opened and the switch S4 is closed. Therefore, the motor rotation signal generator 3
3 (see FIG. 5), a motor rotation signal is outputted and sent to the motor control section 31, thereby causing the motor 30 to rotate in the same direction as described above.

1; As described above, the rotation of the motor 30 causes the cam member 11 to rotate clockwise. In the lens-projecting Y-island, the bottle 10b is located at the boundary between the grooves 12b and 12c of the grooved cam 12, as shown in FIG. 2(b). When the cam member 11 rotates clockwise from the state shown in FIG.
The lens barrel block 4 is moved back from its protruding position toward the storage position against the force. When the lens barrel block 4 retreats and the toggle spring 13 passes its dead center, the grooved cam 12
According to the rotation of the lens barrel block 4? & When the area of the groove 12a of the groove cam 12 reaches the position of the pin tab, the curvature r of the groove cam 12 becomes constant, and the lens barrel block 4 retreats by 1 tot, and this state is at the lens storage position l. be.

When the lens barrel block 4 is stored and moved in this manner, the flash drive lever 5 rotates clockwise about the fulcrum AI. This movement causes the tip gear 5b of the lever 5 to
drives the rack 6 downward, so the protrusion 6 of the rack 6
a drives the flash device block 7c downward while engaging with the arm 7b of the flash device block 7C, so that the flash device block 7C is in the retracted position ff1 (proximal f
f1). Note that the light emitting part cannot emit light in the storage position.

In the following explanation, the photographing lens and the flash device in a so-called collapsible camera are linked, but only the master lens is used for wide-angle photography.

During telephoto shooting, the master lens is moved by gravity and a conversion lens is placed behind it.The photographic lens and flash device in a so-called bifocal camera may be linked.In this case, when using the master lens, that is, when the master lens is used as a film When the flash unit is brought close to the surface, the light emitting part of the flash unit is brought closer to the optical axis, and when the master lens is moved away from the film and the conversion lens is placed between the master lens and the film surface, the light emitting part of the flash unit is moved closer to the optical axis. The photographing lens and the flash device are interlocked so as to be moved away from the camera, and the flash device block 7C can emit light even if the flash device block 7C is located close to the flash device block 7C.

(Effects of the Invention) According to the present invention, when the photographing lens is driven to the close position t, the light emitting unit is driven to the close position in conjunction with this, so the light emitting unit can be reliably retracted at the end of shooting Y. Operations become more convenient.

Furthermore, in a camera in which the capacitor of the flash device is constantly charged only when the light emitting part is projected, it is possible to prevent undesired battery consumption when using the camera. Furthermore, in a bifocal camera, the light emitting section always approaches the optical axis of the photographing lens during wide-angle photography, so good photographic results can always be obtained.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is an exploded perspective view showing one embodiment of the present invention applied to a retractable camera, and FIGS. 2(a) and (b) are
2(a) shows the lens storage position, FIG. 2(b) shows the lens protruding position, and FIG. 3 is a plan view of the lens position selection switch. , FIG. 4 is a plan view of the lens position detection switch, and FIG. 5 is a block diagram showing an example of the motor control system. 2: Lens barrel 3a, 3b: Rod 4: Lens barrel block 4a, 4b: Bin 5: Flash device drive lever 5a; Fork 5b: Gear 6: Rack 6a, 6b: Arm 7: Flash device 7C: Flash device block 8: Compression spring lO Nilever 10a: Elongated hole fob: Bin ll = Cam member 12: Groove cam 13 Nidoguru spring 2o: Lens position selection lever 20a + knob 20b = Arm 20C: Brush 22: Camera body 23: No, (plate 24 : Brush gear 24a = Brush 25: Board 30: Motor 31: Motor control unit 33: Motor rotation signal generator size

Claims (1)

[Scope of Claims] A photographing lens in which at least a part of the lens system can take two positions: a lens close position close to an imaging surface and a lens remote position remote from the imaging surface; a near position close to the optical axis of the photographic lens; A built-in flash device comprising: a flash device having a light emitting unit movable between a remote position far from the optical axis of the photographic lens; and a lens drive means for moving the photographic lens between the close position and the remote position. A flash camera, characterized in that the camera is equipped with a flash device drive means that operates in conjunction with the lens drive means and drives the light emitting section to the near position when the photographic lens is driven from the remote position to the near position. Built-in camera.