JPH043033A - Camera with built-in motor - Google Patents

Abstract

PURPOSE:To miniaturize the camera by housing a lens driving motor together with a film feeding motor into a winding spool. CONSTITUTION:The lens driving motor 42 is housed together with the film feeding motor 41 into the winding spool 1 and is so constituted that the revolutions of both motors 41, 42 are respectively transmitted from the top end and bottom end of the winding spool 1 to a film feeding mechanism 60 and a lens driving mechanism 50. Namely, the revolutions of the film feeding motor 41 are transmitted from the bottom end (top end) of the winding spool 1 to the film feeding mechanism 60, by which the feeding of the film FI is executed. The revolutions of the lens driving motor 42 are transmitted from the top end (bottom end) of the winding spool 1 to the lens driving mechanism 50, by which the driving of a photographic lens LE is executed. The camera is miniaturized in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a camera incorporating at least two motors, one for film feeding and one for lens parking.

B. Prior Art FIG. 4 is a sectional view showing the vicinity of the winding spool of this type of camera.

In FIG. 4, a cylindrical film winding spool 1 is rotatably supported by a spool mounting portion 2 fixedly installed inside the camera body. A film feeding motor 5 is inserted and fixed inside the take-up spool 1 via a mounting member 3.4, and its output shaft 5a protrudes from the lower end of the take-up spool l. The rotation of the motor 5 is transmitted to the gear 7 via the gear 6 attached to the output shaft 5a and a gear train (not shown). The gear 7 meshes with a gear 1a formed on the outer circumferential surface of the lower end of the take-up spool 1. Therefore, the rotation of the gear 7 rotates the take-up spool 1, and the film FI is wound onto the spool 1. Further, the rotation of the motor 5 in the opposite direction is transmitted to a rewinding fork (not shown) via the FV wheel 6 and a gear train (not shown), and the film FI is rewound by the rotation of the rewinding fork.

Furthermore, this type of camera is provided with a lens immediate movement motor (not shown) at the top of the camera body or near the photographic lens, and this motor performs zooming or focusing of the photographic lens.

C1 Problems to be Solved by the Invention However, in conventional cameras with a built-in motor, the lens drive motor is provided outside the winding spool, as described above, which necessitates an increase in the size of the camera.

A technical problem of the present invention is to reduce the size of a camera.

Means for Solving the Problem 00 To be explained in conjunction with FIGS. 1(a) and 1(b) showing an embodiment, the invention of claim 1 provides a film winding spool 1 and a film winding spool 1. a film feeding motor 41 housed therein; and a film feeding mechanism 60 that feeds the film Fr by rotation of the film feeding motor 41.
The present invention is applied to a camera incorporating a photographing lens driving motor 42 and a lens drive mechanism 50 that drives the photographing lens LE by rotation of the photographing lens driving motor 42.

The lens driving motor 42 is housed in the winding spool 1 together with the film feeding motor 41, and both motors 41
, 42 are transmitted from the upper and lower ends of the winding spool 1 to the film feeding mechanism 60 and the lens drive mechanism 50, respectively, thereby achieving the above technical problem.

Similarly, referring to FIG. 1, the invention according to claim 3 includes the above-mentioned film winding spool 1.

A film feeding motor 41 and a film feeding mechanism 70 housed in the film winding spool.

Zoom finder 3 provided at the top of the camera body 10
0, zooming motor 42, and zooming motor 42
The present invention is applied to a camera having a built-in zooming mechanism 50 that zooms the photographic lens LE and zooms the finder 30 in synchronization with the rotation of the lens LE. The zooming motor 42 is housed in the winding spool 1 together with the film feeding motor 41, and the rotation of the zooming motor 42 is transmitted from the upper end of the winding spool 1 to the zooming mechanism 5o.
1 rotation is transmitted from the lower end of the winding spool 1 to the film feeding mechanism 60, thereby achieving the above technical problem.

E0 effect (1) The rotation of the film feeding motor 41 according to claim 1 is transmitted from the lower end (upper end) on the winding spool to the film feeding mechanism 60, thereby feeding the film FI. . Further, the rotation of the lens drive motor 42 is transmitted from the upper end (lower end) of the winding spool 1 to the lens motion mechanism 50, whereby the photographing lens LE is activated. Since both the film feeding motor 41 and the lens driving motor 42 are housed in the winding spool 1 in this manner, the camera can be made smaller.

(2) The rotation of the film feeding motor 41 is transmitted from the lower end of the first spool 1 to the film feeding mechanism 60, thereby feeding the film FI. Further, the rotation of the zooming motor 42 is transmitted from the upper end of the winding spool 1 to the zooming mechanism 5o, whereby zooming of the photographic lens LE and zooming of the zoom finder 30 are performed in synchronization. Since both the film feeding motor 41 and the zooming motor 42 are housed in the winding spool 1 in this way, the camera can be made smaller in the same way as described above.

Furthermore, since the rotation of the zooming motor 42 is transmitted from the upper end of the winding spool 1 to the zooming mechanism, the zooming of the photographic lens LE and the zooming of the zoom finder 3o located at the top of the camera body 10 are synchronized as described above. When doing so, the configuration of the zooming mechanism 50 can be simplified.

In the above-mentioned Sections and Sections E which describe the present invention in detail, figures of Examples are used to make the present invention easier to understand, but the present invention is not limited to the Examples.

F. Example An embodiment of the present invention will be explained with reference to FIG.

FIG. 1(a) is a diagram showing a schematic configuration of a camera with a built-in motor according to the present invention, and FIG. 1(b) is a cross-sectional view taken along line bb--b.

In the figure, 10 is the camera body, LE is a photographic lens with variable focal length (zoom lens), and PT is the camera body 10.
The cartridge loaded in the cartridge, FI, is a film pulled out from the cartridge PT.

The photographic lenses L and E are composed of a cam tube 21 and a cam tube 21.
The lens holder 2 has two lens groups Ll and L2 held therein via lens holders 22 and 23, respectively.
The cam followers 22a and 23a installed at 2.23 are the cam grooves 21a of the cam cylinder 21.

21b, respectively. , 30 are two lenses L3. It is a zoom finder with L4.

The lens L4 is fixed within the camera body 10 by a member not shown. The lens L3 is held by a lens holder 31 and is movable together with the lens holder 31 in the optical axis direction.

Further, a film winding spool 1 is rotatably supported in a spool mounting part 2 fixedly installed in the camera body 10, and a film feeding motor 41 and a zooming motor (lens driving motor) 42 are housed therein. has been done. The zooming motor 42 is fixed with screws 13a to the mounting base plate 12 through which its output shaft 42a passes.
is inserted through the opening at the top of the winding spool 1, and then the mounting base plate 12 is screwed onto the spool mounting portion 2 with screws 13b. Similarly, the film feeding motor 41 is fixed with screws 15a to the mounting base plate 14 through which the output shaft 41a passes, and after inserting this motor 41 from the opening at the bottom of the spool 1, the mounting base plate 14 is fixed with screws 15b. It is screwed onto the spool attachment part 2.

As a result, the output shaft 42a of the zooming motor 42 is projected from the upper end of the take-up spool 1, and the film feeding motor 4
The first output shaft 42a protrudes from the lower end of the winding spool 1. Furthermore, the lead wires Ql and Q2 of each motor 41 and 42 are led out through holes in the mounting base plate 12 and 14, respectively.

A gear 51 is fixed to the output shaft 42a of the zooming motor 42, and the rotation of the gear 51 is transmitted to the gear 58 via gears 52 to 55 and worm gears 56 and 57. The gear 58 meshes with a gear 21b formed on the outer circumferential surface of the cam barrel 21 of the photographic lens LE, so that the rotation of the gear 58 rotates the cam barrel 2. As the cam cylinder 21 rotates, the cam grooves 21a and 21b move to move the cam followers 22a and 23a, so that the lens group L1. ．． L2 moves in the optical axis direction and the distance between the lenses changes to perform zooming.

A cam plate 59 is integrally attached to the gear 54, and a cam follower 31a protruding from the lower end of the lens holder 31 of the finder 3o is in contact with the outer peripheral surface of the cam plate 59. The rotation of the gear 54 rotates the cam plate 59, and the movement of the outer peripheral surface of the cam plate 59 drives the cam follower 31a, thereby driving the lens holder 31, that is, the lens L3, in the direction of its optical axis. That is, the finder 30 is zoomed in synchronization with the zooming of the photographic lens LE. Here, the gears 52 to 55, 58 . Worm gear 5
6.57. The cam plate 59 constitutes the zooming mechanism 50.

On the other hand, a gear 61 is fixed to the output shaft 41a of the film feeding motor 41 that protrudes from the lower end of the first winding spool 1.
This gear 61 is connected to a gear 63 via a gear train 62 and to a rewinding fork (not shown) via a gear train 64. By a well-known mechanism, rotation of the gear 61 in the forward direction is transmitted to the gear 63 via the gear train 62, and rotation of the gear 61 in the opposite direction is transmitted to the film rewinding fork through the gear train 64. It has become. The gear 63 meshes with a gear 1a formed on the outer peripheral surface of the hoisting spool 1, and the rotation of the gear 63 causes the hoisting spool 1 to rotate. As a result, Patrone PT
The film FI pulled out is wound onto a winding spool 1. Further, the rotation of the first rewind fork rotates the shaft within the cartridge PT, and the film Fl is rewound onto the shaft.

Here, the gears 61, 63 and the gear trains 62, 64 constitute a film feeding mechanism.

As described above, since the zooming motor 42 is housed in the winding spool 1 together with the film feed motor 41, the camera can be made smaller than the conventional camera by the space of the zooming motor 42. Further, in this embodiment, since the output shaft 42a of the zooming motor 42 is configured to protrude from the upper end of the winding spool 1, the zooming of the photographic lens LE and the zooming of the zoom finder 30 are performed in synchronization. The configuration of the secondary zooming mechanism 50 can be simplified.

In the above example, the two motors 41 and 42 are housed individually in the hoisting spool 1.
The figure shows another embodiment in which two motors are integrated and inserted into the spool 1.

In FIG. 2, reference numeral 71 is a connecting member made of plastic, for example, and one end thereof is inserted and fixed to the bottom of the film feeding motor 72. A recess 71a is formed in the connecting member 71, and a protrusion 73a formed integrally with the bottom of the zooming motor 73 is fitted and fixed into the recess 71a.

That is, the motors 72, 73 are integrated by the connecting member 71. The film feeding motor 72 is fixed with screws 75 to a mounting base plate 74 through which its output shaft 72a passes, and after inserting the integrated motors 72 and 73 from the opening at the bottom of the spool 1, is screwed onto the spool attachment portion 2 with a screw 76. As a result, the output shaft 73b of the zooming motor 73 protrudes from the upper end of the take-up spool 1, and the output shaft 72a of the film feeding motor 72
is projected from the lower end of the winding spool 1. Ql and Q2 are lead wires of the motors 72 and 73, respectively, and the lead wire Ql of the film feeding motor 72 is drawn out through a hole in the mounting base plate 12.

According to the above configuration, it is not necessary to fix the zooming motor 73 to the spool attachment portion 2 using the attachment base plate, so that the number of assembly steps can be reduced accordingly. Note that, contrary to the above, the zooming motor 73 may be fixed to the upper part of the spool attachment part 2 by a mounting base plate.

Further, in FIG. 3, reference numeral 81 is a cylindrical connecting member (made of plastic, for example), and its outer diameter is approximately the same as the outer diameter of the film feeding motor 82. The opening end of the connecting member 81 has a flange 81. a is formed, and its base end is inserted and fixed to the bottom of the film feeding motor 82. A zooming motor 83 is inserted into the connecting member 81 from the open end, and a protrusion 81a formed at the bottom of the motor 83 is fitted into a recess 81b at the bottom of the connecting member 81 and fixed.

That is, the zooming motor 83 has a smaller diameter than the film feeding motor 82, and these motors 82 and 83 are integrated by the connecting member 71. Furthermore, a groove 83c is provided in the axial direction of the connecting member 81, and the lead wires Q1. of both motors pass through the groove 83c. Q2 is the communication member 81
is pulled out from the opening.

The motors 82, 83 integrated in this way are inserted into the hoisting spool 1 from above, and are inserted into the flange 8 of the connecting member 81.
1a is screwed and fixed to the spool attachment part 2 with a screw 84. In this case as well, since only the connecting member 81 needs to be fixed to the spool attachment portion 2, the number of assembly steps can be reduced compared to the embodiment shown in FIG.

Here, when comparing FIG. 2 and FIG. 3, the zooming motor 83 in FIG. 3 has a smaller diameter than the zooming motor 73 in FIG. It can be seen that the feeding motor 82 has a shorter axial dimension than the film feeding motor 72 shown in FIG. 2, but has a larger diameter. Generally, the output of a motor depends on its volume. Therefore, even if motors 82 and 83 of different diameters are used as shown in FIG. 3, if the diameter of one motor 83 is increased and the axial dimension is shortened, Since the other motor 82 can have a long axial dimension even if it has a small diameter, the output of each motor 82, 83 will not decrease. Note that, contrary to the above, the film feeding motor 82 may have a smaller diameter than the zooming motor 83.

Although the above example uses a zoom lens, the zoom lens referred to in this specification includes not only a lens whose focal length is continuously variable, but also a lens whose focal length is variable in five steps, such as a bifocal lens or a trifocal lens. This also includes those with variable focal lengths. Furthermore, the lens drive motor and lens movement mechanism are
The lens is not limited to one that performs zooming, but may also perform focusing.

Effect of the G0 Invention According to the invention of claim 1, since the lens driving motor is housed in the winding spool together with the film feeding motor,
The camera can be made more compact than the conventional camera in which only the film feed motor is housed in the winding spool.

Further, according to the third aspect of the present invention, since the zooming motor and the film feeding motor are housed in the winding spool, the camera can be made smaller in the same way as described above. In addition, the rotation of the zoom motor is transmitted from the top end of the spool to the zooming mechanism, which simplifies the configuration of the zooming mechanism when zooming the photographic lens and the zoom finder on the top of the camera body are synchronized. This makes it possible to further reduce the size and cost of the camera.

[Brief explanation of the drawing]

FIG. 1(a) is a schematic configuration diagram showing one embodiment of a camera with a built-in motor according to the present invention, FIG. 1(b) is a cross-sectional view taken along the line bb line, and FIGS. 2 and 3 are another embodiment. FIG. FIG. 4 is a partial sectional view showing the configuration of a conventional camera. 1: Winding spool 2 Nispool mounting part 10: Camera body 30: Zoom finder 41.72,
73: Film feeding motor 42. 73, 83: Zooming motor 50: Zooming mechanism 60: Film feeding mechanism F1
:Film LE:Photographing lens PT:Patrone

Claims (1)

[Claims] 1) A film winding spool, a film feeding motor housed in the film winding spool, and a film feeding mechanism that feeds the film by rotating the film feeding motor. and a camera incorporating a taking lens driving motor and a lens driving mechanism that drives the taking lens by rotation of the taking lens driving motor, wherein the lens driving motor is connected to the winding spool together with the film feeding motor. 1. A camera with a built-in motor, characterized in that the camera is configured such that the rotation of both motors is transmitted from the upper end and the lower end of the winding spool to the film feeding mechanism and the lens driving mechanism, respectively. 2) The camera with a built-in motor according to claim 1, wherein the film feeding motor and the lens driving motor are integrally constructed. 3) A film winding spool, a film feeding motor housed in the film winding spool, a film feeding mechanism that feeds the film by rotation of the film feeding motor, and an upper part of the camera body. a zoom finder provided in the camera, a zooming motor, and a zooming mechanism that performs zooming of the photographing lens by rotation of the zooming motor and zooms the finder in synchronization with the zooming mechanism, wherein the zooming motor is housed in the winding spool along with the film feeding motor, the rotation of the zooming motor is transmitted from the upper end of the winding spool to the zooming mechanism, and the rotation of the film feeding motor is transmitted to the lower end of the winding spool. A camera with a built-in motor, characterized in that the camera is configured to transmit information from the film to the film feeding mechanism. 4) The camera with a built-in motor according to claim 3, wherein the film feeding motor and the zooming motor are integrally constructed. 5) The diameter of the one motor is made smaller than the diameter of the other motor, and a passage is provided between the small diameter motor and the inner wall of the hoisting spool to guide the lead wires of both motors to the outside of the hoisting spool. Claims 1 to 4 are characterized in that:
A camera with a built-in motor as described in any of the above.