JP2000231146A - Driving device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device for a camera whose degree of freedom in the arrangement of a driving path is high and capable of attaining the miniaturization of the camera. SOLUTION: A driving force transmission mechanism 7 for driving the moving frame 10 of a lens barrel forward and backward, a driving force transmission mechanism 8 for rewinding a film are incorporated into a camera equipped with the driving device. The rotational force of a spur gear 7a driven by a driving source is transmitted to a moving frame driving gear box 12 through flexible wire material 7b arranged in a bent state by the driving force transmission mechanism 7. Besides, the rotational force of a spur gear 8a driven by the driving source is transmitted to a rewinding fork worm 8c through flexible wire material 8b arranged in a bent state by the driving force transmission mechanism 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera driving device for transmitting a driving force in a camera mechanism.

[0002]

2. Description of the Related Art In a conventional camera, a film is fed and a lens is driven via a driving force transmitting device. Usually, a gear train including many gears is used for the driving force transmitting device. The gears are connected to each other by a metal inflexible connecting shaft or the like. However, when the above-mentioned inflexible connecting shaft is used, the arrangement is limited, and there is a limit to miniaturization and compactness of the camera.

To solve the above-mentioned problem, Japanese Patent Laid-Open No.
There is a film electric rewinding device for a camera disclosed in Japanese Patent Application Laid-Open No. 9-123828. In this device, a flexible coil spring-like connection shaft (rotational drive transmission shaft) is applied as a rotational drive transmission member that connects drive gears. The connecting shaft is arranged so that a portion between the drive-side input terminal and the load-side output terminal is bent in a right angle direction, so that a bevel gear or the like for changing the direction is not required, and the arrangement space is efficient. It enables a good arrangement.

[0004]

However, when a flexible coil spring-like connecting shaft is applied as in the device disclosed in Japanese Patent Application Laid-Open No. Sho 59-123828, the rotational direction and the magnitude of the load are large. In some cases, the coil portion may expand in the radial direction and hinder driving.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a camera driving device which has a high degree of freedom in arranging a driving force transmission path and can cope with a downsizing of the camera. Aim.

[0006]

According to a first aspect of the present invention, there is provided a camera driving device comprising: a motor; a driven gear driven by receiving a driving force of the motor; A driven unit driven by receiving the driving force from the motor via the driven gear, and the driven gear for transmitting the driving force from the driven gear to the driven unit. A metal flexible wire member for mechanically connecting the driven portion to the driven portion, and a driving force of a motor is transmitted from the driven gear to the driven portion via the flexible wire member. Is transmitted.

A camera driving apparatus according to a second aspect of the present invention includes a motor, a driven gear driven by receiving a driving force of the motor, and a driven gear provided inside the camera via the driven gear. And a driven part driven by receiving the driving force from the motor, and the driven gear and the driven part in order to transmit the driving force from the driven gear to the driven part. A plurality of driving force transmitting elements that are mechanically connected to each other, and a driving force of a motor is transmitted from the driven gear to the driven portion via the driving force transmitting elements.

According to a third aspect of the present invention, there is provided a camera driving device for transmitting a rotational force from a first gear, a second gear, and the first gear to the second gear. A flexible wire member for mechanically connecting the first gear and the second gear; and a driving force of a motor is transmitted from the first gear to the first gear via the flexible wire member. The power is transmitted to the second gear.

According to a fourth aspect of the present invention, in the camera driving apparatus according to the third aspect, at least the first gear or the second gear is movable in the camera space. It is.

According to a fifth aspect of the present invention, there is provided a camera driving device for transmitting a rotational force from a first gear, a second gear, and the first gear to the second gear. A plurality of driving force transmission elements for mechanically connecting the first gear and the second gear; and a first gear to a second gear via the plurality of driving force transmission elements. Driving force is transmitted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the inside of a camera incorporating a driving device according to a first embodiment of the present invention, and FIG. 2 is an enlarged perspective view of a gear box which is a moving frame driving mechanism of the camera of FIG. It is a perspective view.

As shown in FIG. 1, the camera mainly comprises a camera body 1 having an aperture portion 1a, a lens barrel 9 fixedly supported by the camera body 1 and incorporating a photographic optical system.
A movable frame 10 having one or more lens groups supported movably in a lens barrel 9, a drive motor 3 as a drive source for winding and rewinding a film, and driving a lens; A film take-up spool 2 in which a drive motor 3 is housed, a drive switching mechanism 11 disposed below the spool 2, and a gear box (moving frame driving mechanism) for driving the moving frame 10 forward and backward ) 12
A fork 13 for rewinding the loaded film cartridge, a driving force transmitting mechanism 7 for driving a moving frame as a driving device, and a driving force transmitting mechanism 8 for driving a fork portion. I have.

A rack 9a is fixed to the lens barrel 9 along the optical axis direction, and a pinion 12n of a gear box 12 of the moving frame 10 described later meshes with the rack 9a.
Therefore, when the pinion 12n is rotationally driven, the moving frame 10 moves forward and backward in the optical axis direction.

The drive switching mechanism section 11 is a planetary drive gear system composed of a spur gear, and has a pinion 3a as a sun gear fixed to an output shaft of the drive motor 3, and
A planetary gear 4 meshing with the pinion 3a;
And a rotation arm 5 rotatably supported around the output shaft of the drive motor.

The planetary gear 4 is rotated by its orbital motion.
A gear 6a of the stepped gear 6, a driven gear 7a which is a driven gear (first gear) of the driving force transmission mechanism 7, and a driven gear (first gear) of the driving force transmission mechanism 8. Driven gear 8
a and are engaged. The two-stage gear 6
Is a two-stage gear composed of a gear 6a and a gear 6b meshing with the gear 2a of the spool 2.

The driving force transmission mechanism 7 mainly includes the driven gear 7a, a single elastically deformable flexible wire 7b,
It comprises a coupling member 12h and a cylindrical bearing 14a rotatably supporting the flexible wire 7b to be inserted.

The coupling member is a gear box 12
And the bevel gear 12 of the driven gear (second gear)
This is a member that couples and fixes the drive shaft 12i holding g and the flexible wire 7b. Also, the bearing 14a
Is a member fixedly supported by the camera body 1 and rotatably supporting the wire 7b near the driven gear 7a. The driven gear 7a is rotatably supported by a bearing (not shown) of the camera body 1.

The flexible wire 7b is a single wire, for example, an elastically deformable metal wire such as a piano wire or a stainless steel wire is applied. Then, the hub 7c of the driven gear 7a is fixed on one driving side, and a rotatable bearing 14a is inserted in the vicinity thereof, and the gear box 12 (described later) in the moving frame 10 is inserted on the other driven side. The side connecting member 12h is fixed. In addition, this flexible wire 7
As the wire diameter b, an appropriate diameter is selected in consideration of the degree of torsional deformation due to the load of the driven mechanism.

The flexible wire 7b is connected to the bearing 14
It is assumed that it is arranged to be bent with a large curvature within a range allowed in the camera body space from the position a to the position of the engaging member 12h of the gear box 12 in the moving frame 10.

The gear box (moving frame drive mechanism) 1
Numeral 2 is housed inside the moving frame 10 and is constituted by a gear system rotatably supported by the base plates 12a and 12b in the gear box body. That is, the ground plate 12a,
A first gear unit composed of a spur gear portion 12j and a bevel gear portion 12f, and a spur gear portion 12k and a bevel gear portion 12l. A second gear unit comprising:
A rotation support plate 12c coaxially rotatably supported by the first gear unit; and bearing portions 12d, 12e provided on the rotation support plate 12c and extending in a direction perpendicular to the axis of the first gear unit. A shaft 12i rotatably supported by the bearings 12d and 12e; a bevel gear 12g fixed to the shaft 12i and meshing with the bevel gear 12f; one fixed to the shaft 12i; The flexible wire 7
and a shaft 12h rotatably supported by the main plate 12a and orthogonal to the axis of the second gear unit.
p, a bevel gear 121 fixed to the shaft 12p and meshing with the spur gear portion 12m, and a pinion 12n fixed to the shaft end of the shaft 12p.

The pinion 12n is engaged with a rack 9a provided in the lens barrel 9. Therefore, when the shaft 12i is rotationally driven via the coupling member 12h, the rotation is transmitted from the spur gears 12j and 12k to the bevel gear 12l via the bevel gear 12g and the bevel gear 12f. Further, the moving frame 10 is transmitted to the pinion 12n via the bevel gear 12m, and the movable frame 10 is driven forward and backward in the optical axis direction by the pinion 12n and the rack 9a. The gear box 12 moves in the optical axis direction together with the moving frame 10 during the forward / backward drive.

The coupling member 12h rotates together with the shaft 12i and the rotation support plate 12c, and its position and inclination change. Therefore, when the gear box 12 moves forward and backward in the optical axis direction, the inclination of the engagement member 12h changes and the bending state of the flexible wire 7b also changes.

The driving force transmission mechanism 8 mainly includes the driven gear 8a, a single elastically deformable flexible wire 8b,
A worm 8c as a driven gear (second gear); and the flexible wire 8 fixedly supported by the camera body 1 and inserted therethrough.
bearings 14b, 14c, and 14d rotatably supporting b
Consists of The driven gear 8a is connected to the camera body 1
Are rotatably supported by bearings (not shown).

The flexible wire 8b is a wire, for example, a metal wire such as a piano wire or a stainless steel wire. The driven end is fixed to the hub 8d of the driven gear 8a, and after the bearings 14b and 14c are inserted, the driven side is inserted and fixed to the worm 8c. It is arranged.

The flexible wire 8b is connected to the driven gear 8
Since the a and the worm 8c are arranged so that the axes thereof are orthogonal to each other, the bearings 14b and 14c are arranged to be bent with a large curvature within an allowable range in the camera body 1 space. The wire diameter of the flexible wire 8b is appropriately selected in consideration of the degree of torsional deformation due to the load of the driven mechanism.

The fork 13 has a fork portion 13a which can be fitted into a hub of a film cartridge to be loaded, and a worm wheel 13a which meshes with the worm 8c is integrally provided.

Next, the driving operation of the camera of the first embodiment configured as described above will be described. First, when film winding is performed, the drive motor 3 is driven clockwise (as viewed from the output shaft side) to mesh the planetary gear 4 of the drive switching mechanism 11 with the gear 6a of the two-stage gear 6, The spool 2 is driven to wind up the film.

When moving the moving frame 10 forward or backward, the drive motor 3 is driven counterclockwise (as viewed from the output shaft side). Then, by operating a clutch holding mechanism (not shown), the planetary gear 4 of the drive switching mechanism 11 is meshed with the driven gear 7a of the driving force transmission mechanism 7, and the meshing state is held by a holding mechanism (not shown), Drive. When the driven gear 7a rotates, the flexible wire 7b rotates by receiving the torsional torque in the bent state, and the engagement member 12h
, The bevel gear 12g is driven to rotate. Bevel gear 1
By the rotation of 2g, the bevel gear 12m and the pinion 12n are rotationally driven via the first gear unit and the second gear unit.

With the rotation of the pinion 12, the moving frame 10 moves forward and backward along the optical axis via the rack 9a of the lens barrel 9. During the moving operation, the gear box 12 also moves forward and backward, and the connecting member 12h to which the flexible wire 7b is fixed also moves. However, the flexible wire 7b undergoes bending deformation (elastic deformation), and the rotation support plate 12c of the gear box 12 rotates to change the inclination of the coupling member 12h. There is no drive trouble such as stretching.

When rewinding the film, the drive motor 3 is also driven counterclockwise. And
The planetary gear 4 of the drive switching mechanism 11 is moved to the driving force transmission mechanism 8 with the clutch holding mechanism (not shown) inactive.
And driven to rotate. Due to the rotation of the driven gear 8a, the flexible wire 8b receives the torsional torque and rotates while being bent, and the worm 8c is rotationally driven. Worm wheel 1 by the above worm 8c
3a is driven, the hub of the film cartridge is driven via the fork 13, and the film is rewound.

As described above, according to the camera incorporating the driving device of the first embodiment, a driving force transmitting mechanism using a flexible wire as a driving shaft for feeding a film or driving a lens frame. Since 7, 8 is applied, it is not necessary to use many gear trains, straight drive shafts and the like as in the conventional drive device, so that the degree of freedom in the arrangement of the drive path is increased, and the spool chamber or The space occupied between the patrone chamber and the drive is also very small.

Since the flexible wire as the drive shaft is a single elastically deformable wire, the coil diameter of the coil spring is set to the same value as in the conventional drive device using the above-described coil spring drive shaft. There is no problem such as spreading inside. Further, there is no need to dispose a focusing motor or a zoom motor inside the lens barrel, and it is possible to drive a moving frame such as a zoom frame from outside the lens barrel.

Further, since the flexible wire used as the drive shaft is used by bending a single wire, the diameter of the coil spring changes as in a conventional drive device using a coil spring as a drive shaft. It will not hinder you.

Next, a driving force transmitting mechanism which is a driving device of a camera according to a second embodiment of the present invention will be described. The driving force transmission mechanism of this embodiment corresponds to the driving force transmission mechanism 8 shown in the first embodiment, and is a driving force transmission device between a driving side and a non-driving side having different axes. For example, the present invention can be applied as a drive device such as a film rewind drive of a camera. However, in the case of the present embodiment, a spur gear is applied to the worm 8c in the driving force transmission mechanism 8.

FIG. 3 is a longitudinal sectional view of the driving force transmission mechanism 15 according to the second embodiment. FIGS. 4 and 5 are exploded perspective views showing a fixed structure of a gear and a shaft applied to the driving force transmission mechanism of FIG.

As shown in FIG. 3, the driving force transmission mechanism 15
Is a spur gear 16 which is a driven gear (first gear) driven by a drive source such as a motor, a single elastically deformable flexible wire 17, a straight bearing 18, and a highly rigid bend. It comprises a bearing 19 and a spur gear 20 which is a driven gear (second gear) driven by the spur gear 16. The axial directions of the spur gears 16 and 20 are orthogonal to each other, and the spur gear 20 is positioned obliquely above the spur gear 16.

The spur gear 16 is supported with its hub 16a rotatably supported by a bearing 1a of the camera body. Further, the spur gear 20 is supported in a state where its hub portion 20a is rotatably supported by a bearing portion 1d of the camera body.

The flexible wire 17 is a single wire, for example, an elastically deformable metal wire such as a piano wire or a stainless steel wire is applied. The hub 16a of the spur gear 16 is fixed to the drive side end, and after the straight bearing 18 is inserted while being rotatably supported in the loosely fitted state, the hub 16a is further rotatably supported in the loosely fitted state. In this state, the high-rigidity bending bearing 19 is inserted and bent 90 ° in the direction, and the driven side end is fixedly attached to the hub 20 a of the spur gear 20. The structure for fixing the wire and the gear hub will be described later in detail.

The straight bearing 18 is a straight bearing which is fixedly supported by the bearing support 1b of the camera body and into which the flexible wire 17 is fitted in a loosely fitted state.

The bending bearing 19 is fixedly supported by a bearing support portion 1c of the camera body. The wire 17 is fitted in a loosely fitted state, and is bent at 90 degrees as described above to support it. There is an entrance and exit end 19
The a and 19b have a trumpet shape whose diameter gradually widens, thereby preventing the wire 17 from being bent.

In the fixing structure of the spur gear 16 and the end of the flexible wire 17 on the drive side, as shown in an exploded perspective view of FIG. Is provided with a D-shaped through hole 16b which is precisely fitted (fitted with a very small gap) with the flexible wire. A D-shaped cut portion 17a is provided at the drive-side end of the wire 17 to be fitted. The D-shaped cut portion 17a of the wire 17 is press-fitted into the D-shaped through hole 16b of the spur gear 16 from the hub side or adhered after fitting, thereby securely fixing the two.

In the structure for fixing the spur gear 20 and the driven wire end of the flexible wire 17, as shown in the exploded perspective view of FIG. A slit 20c having the width of the flexible wire 17 is provided on the end face, and a precision fitting hole 20b for fitting the wire into the hub 20a.
Is provided. A bent portion 17b is provided at the driven end of the flexible wire 17.

Then, the wire 17 is inserted into the fitting hole 20b of the spur gear 20 from the gear surface side from the D-shaped cut portion 17a side, and the bent portion 17b is formed into the slot 2 of the spur gear 20.
0c. In this state, the bent portion and the slit portion are securely fixed by bonding, welding, caulking, or the like.

The fixing between the spur gear 16 and the driving-side end of the flexible wire 17 and the fixing between the spur gear 20 and the driven-side end of the flexible wire 17 are the same as those described above. Instead of using only the structure, it may be simply press-fitted, crimped after press-fitting, or fixed by bonding, welding, or the like.

In the driving force transmission mechanism 15 of the second embodiment configured as described above, when the spur gear 16 is driven by a driving system (not shown), the driving-side end of the flexible wire 17 has a torsional torque. Accordingly, the spur gear 20 at the other driven side end is rotated in the bent state, and is rotated.

According to the driving force transmission mechanism 15, the spur gear 20 which is obliquely upward and has a different axial direction by 90 ° can be rotationally driven via the flexible wire 17 which is bent and supported. , They can be arranged in very little space. Further, the flexible wire 17 is supported and bent by the bending bearing 19 to which the flexible wire 17 is loosely fitted, and the entrance and the exit of the bending bearing 19 are formed in a trumpet shape. Driving force can be transmitted.

Next, a modified example of the structure for fixing the spur gear 20 and the flexible wire 17 in the second embodiment will be described. FIG. 6 is an exploded perspective view showing a fixing structure of the above-described modification of the spur gear and the flexible wire.

As shown in FIG. 6, a slot 20Ac having a width of the wire 17A is provided on the end face of the spur gear 20A on the gear side, and a fitting hole 20Ab for precisely fitting the wire with the hub 20Aa.
Is provided. Further, an arc portion 17Ab bent in an arc shape on a plane is provided at the driven end of the wire 17. And
The wire 17A is inserted into the fitting hole 20Ab of the spur gear 20A from the side of the gear surface, and is inserted therethrough to push the circular arc portion 17Ab into the slot 20c of the spur gear 20A. In this state, the arc and slot are bonded, or spot welded,
Alternatively, secure fixation is performed by caulking or the like.

According to the fixing structure of the spur gear and the flexible wire of the present modification, the wire can be securely fixed to the spur gear in the same manner as in the fixing structure of the second embodiment. Since the end is formed in an arc shape, it can be fitted deeply into the slot of the spur gear, and is hardly disengaged.

In the above fixing structure, the flexible wire 1
Instead of forming the circular arc portion 17Ab at the end of 7A in a planar manner, an end shape in a state of being spirally twisted is adopted, and the spiral end is formed as the slit 20Ac of the spur gear 20A. It is also possible to adopt a fixing structure that presses in while deforming and fixes it by bonding or welding.

Next, a description will be given of a driving force transmission mechanism which is a driving device of a camera according to a third embodiment of the present invention. The driving force transmission mechanism of this embodiment corresponds to the driving force transmission mechanism 8 shown in the first embodiment, similarly to the second embodiment, and is different from the driving side whose axes are staggered with each other. The present invention can be applied as a driving force transmission device between driving sides, for example, a driving device such as a film rewinding drive of a camera.

FIG. 7 is a perspective view of the driving force transmission mechanism 31 according to the third embodiment. As shown in FIG. 7, the driving force transmission mechanism 31 includes a spur gear 32 which is a driven gear (first gear) driven by a driving source such as a motor (not shown).
And three elastically deformable flexible wires 33a, 33b,
33c, a high-rigidity curved bearing 34, and a spur gear 35 which is a driven gear (second gear) driven by the spur gear 32. The axes of the spur gears 32 and 35 are orthogonal to each other, and the spur gear 35 is positioned obliquely above the spur gear 32.

The spur gears 32 and 35 are supported in a state where the respective hub portions 32a and 35a are rotatably supported by bearings of a camera body (not shown).

The three flexible wires 33a, 33b, 3
Reference numeral 3c denotes a wire, for example, an elastically deformable metal wire such as a piano wire or a stainless steel wire is applied. Each of the three flexible wires has a drive-side end having a hole 32b, 32c, 32 of a hub portion 32a of the spur gear 32.
It is inserted into d and attached. And
The bending bearing 34 is freely rotatably supported by loose fitting and is inserted by bending the direction by 90 °, and the driven side ends of the holes 35b, 35c, 35d of the hub 35a of the spur gear 35 are respectively formed.
Is inserted and fixed. Between the gears 32 and 35, the flexible wires 33a, 33b, and 33c are assembled without being twisted.

The bending bearing 34 is fixedly supported by a bearing support 1c of the camera body, and the three flexible wires 33a, 33b, 33c are inserted in a loose fit state and bent in the direction by 90 °. It is a bearing for supporting it. Further, it has a trumpet shape whose diameter gradually widens at the entrance and exit ends 19a and 19b, thereby preventing the flexible wire from breaking or the like.

In the driving force transmission mechanism 31 of the third embodiment configured as described above, when the spur gear 32 is rotationally driven by a driving system (not shown), the three flexible wires 3
3a, 33b, and 33c receive the torsional torque and rotate while maintaining the bent state, rotate the other driven end, and rotationally drive the spur gear 35.

According to the driving force transmission mechanism 31 of the third embodiment, the same effect as that of the second embodiment can be obtained. In particular, when three flexible wires are used, Since a wire having a smaller wire diameter than the flexible wire 17 in the embodiment can be adopted, bending is easy, and loss of driving force is reduced. Alternatively, if three (or a plurality of) wire materials having the same wire diameter as the flexible wire material 17 according to the second embodiment are used, a larger torque can be transmitted. .

Next, the bending bearings 19, 34 applied to the driving force transmission mechanisms 15, 31 of the second and third embodiments.
A modification to the above will be described. 8A and 8B are diagrams showing the shape of the bending bearing of the above-described modified example. FIG. 8A is a side view, and FIG. 8B is a longitudinal sectional view. FIG. 8 shows a case where a single flexible wire is inserted,
When applied to the driving force transmission mechanism 31, three flexible wires are inserted.

As shown in FIG. 8, the high-rigidity curved bearing 36 of the modified example has trumpet-shaped entrances and exits 36a and 36b, and constricted portions 36c, 36d and 36 at three intermediate positions.
e is provided. The flexible wire 37 to be inserted is rotatably supported with a slight gap at the inner peripheral portions of the constricted portions 36c, 36d and 36e in the curved bearing.

If the bending bearing 36 of this modification is applied, when the flexible wire 37 receives the torsional torque and transmits the driving force, the flexible wire 37 is not biased in the bending bearing 36, so that the transmission torque loss is small. It is possible to obtain a driving force transmission mechanism that is suppressed and has high transmission efficiency.

Next, a driving force transmitting mechanism which is a driving device of a camera according to a fourth embodiment of the present invention will be described. The driving force transmission mechanism of this embodiment also corresponds to the driving force transmission mechanism 8 shown in the first embodiment, similarly to the second embodiment, and is different from the driving side in which the axes are staggered with each other. It can be applied as a driving force transmission device between the sides, for example, a driving device such as a film rewind drive of a camera.

FIG. 9 is a perspective view of the driving force transmission mechanism 38 of the fourth embodiment. As shown in FIG. 9, the driving force transmission mechanism 38 includes a spur gear 39 of a driven gear (first gear) driven by a driving source such as a motor (not shown),
A plurality of elastically deformable flexible wires 40a and 40b, a plurality of spherical members 41 which are inserted in the flexible wires and held in a beaded state, and a high-rigidity bent annular bearing 42 and a worm 43 of a driven gear (second gear) driven by the spur gear 39.

The axes of the spur gear 39 and the worm 43 are orthogonal to each other, and the worm 43 is positioned diagonally above the spur gear 39. Also,
The spur gear 39 and the worm 43 are connected to the respective hub portions 3.
Assume that 9a and 43a are rotatably supported by a bearing portion of a camera body (not shown).

The spherical member 41 is a spherical member, through which the flexible wires 40a and 40b can be inserted as shown in the perspective view of FIG. 10A and the vertical sectional view of FIG. It has two parallel through holes 41a and 41b.

The two flexible wires 40a and 40b are
Each wire is an elastically deformable metal wire such as a piano wire or a stainless steel wire.

The spherical member 41 is inserted into the flexible wires 40a and 40b in a rosary shape with the through-holes 41a and 41b inserted therein. The flexible wires 40a and 40b into which the spherical member 41 is inserted are:
Each drive side end is a hub 39a of the spur gear 39.
Between the spur gear 39 and the hub of the worm wheel 43 in a state where the driven side end is inserted and fixed in the holes 43b and 43c of the hub 43a of the worm wheel 43. Will be arranged.

The bending bearing 42 is fixedly supported by a bearing support (not shown) of the camera body, and has a spherical member attached to the flexible wires 40a and 40b in a bead shape on its inner peripheral portion. 41 is rotatably inserted, bent 90 °, guided and held. The inlet and outlet ends 42a and 42b have a trumpet shape whose diameter gradually increases.

In the driving force transmitting mechanism 38, which is the driving device of the fourth embodiment configured as described above, when the spur gear 32 is rotationally driven by a driving system (not shown), the flexible wires 40a and 40b are driven. Upon receiving the torsional torque, the other driven-side end is rotated while maintaining the bent state integrally with the spherical member 41, and the worm 43 is rotationally driven.

According to the driving force transmitting mechanism 38 of the fourth embodiment, the same effect as that of the second embodiment can be obtained. In particular, the spherical members 4 are attached to the two flexible wires 40a and 40b.
By applying a structure in which the 1's are inserted in a bead shape, the two flexible wires are always kept in a parallel state, and it is difficult for the two flexible wires to approach each other during the rotation operation and to be twisted. Therefore, rotation is smoothly transmitted. Further, since the twist is reduced, a thinner wire can be applied to the flexible wire, and the flexible wire can be easily bent.

Next, as a modified example of the spherical member 41 inserted into the flexible wire in the driving force transmitting mechanism 38 of the fourth embodiment, an example in which a columnar member is applied will be described. FIG. 11 is a view showing the shape of a cylindrical member of the above-described modified example, and FIG.
(B) is a longitudinal sectional view.

As shown in FIG. 11, the cylindrical member 41A of the above modification has parallel through holes 41Aa and 41Ab provided along the axis of the cylinder, and both end portions are spherical. The cylindrical member 41 is inserted with two flexible wires, assembled in a rosary form, and inserted into a highly rigid bending bearing.

The other configuration and operation of the driving force transmission mechanism to which the cylindrical member 41A of this modification is applied are the same as those of the fourth embodiment, and have the same effects.

Next, a description will be given of a driving force transmission mechanism which is a driving device of a camera according to a fifth embodiment of the present invention. The driving force transmission mechanism of this embodiment also corresponds to the driving force transmission mechanism 8 shown in the first embodiment, similarly to the second embodiment, and is different from the driving side in which the axes are staggered with each other. The present invention can be applied as a driving force transmission mechanism between the sides, and can be applied as a driving device such as a film rewinding drive of a camera.

FIG. 12 is a perspective view of the driving force transmission mechanism 45 according to the fifth embodiment. As shown in FIG. 12, the driving force transmission mechanism 45 includes a spur gear 46 of a driven gear (first gear) driven by a driving source such as a motor (not shown).
And two elastically deformable flexible wires 47a, 47b
And a plurality of disk members 48 that are inserted in a stacked state by inserting the flexible wire rod, a high-rigidity bent annular bearing 49, and a driven gear (second gear) driven by the spur gear 46. Worm 50).

The axes of the spur gear 46 and the worm 50 are orthogonal to each other, and the worm 50 is positioned diagonally above the spur gear 46. Also,
The spur gear 46 and the worm 50 are connected to the respective hub portions 4.
It is assumed that 6a and 50a are rotatably supported by a bearing part of a camera body (not shown).

The disk member 48 is a disk-shaped member. As shown in the perspective view of FIG. 13A and the vertical sectional view of FIG. It has two insertable through holes 48a and 48b, and a projection 48c for preventing the two through holes 48a and 48b from sticking to each other when they are stacked at the center thereof.

The two flexible wires 47a and 47b are
Each wire is an elastically deformable metal wire such as a piano wire or a stainless steel wire. The two flexible wire rods have their drive-side ends inserted and fixed in the holes 46b and 46c of the hub 46a of the spur gear 46, and the driven-side ends have the hub 50a of the worm wheel 50.
Are inserted and fixed in the holes 50b and 50c.

The disk member 48 is stacked and inserted into the flexible wires 47a and 47b between the spur gear 46 and the hub of the worm wheel 50 with the through holes 48a and 48b inserted therethrough. Have been.

The bending bearing 49 is fixedly supported by a bearing support (not shown) of the camera body, and has a disk member inserted over the flexible wires 47a and 47b in an inner peripheral portion thereof. 48 is rotatably inserted, guides and holds the flexible wire and the disc member by bending the direction by 90 °. The entrance and exit ends 49a and 49b have a trumpet shape whose diameter gradually increases.

In the driving force transmission mechanism 45, which is the driving device of the fifth embodiment configured as described above, when the spur gear 46 is rotationally driven by a driving system (not shown), the flexible wires 47a and 47b are turned. Receiving the torsional torque, the other driven end is rotated while maintaining the bent state integrally with the disk member 48, and the worm 50 is rotationally driven.

According to the driving force transmission mechanism 45 of the fifth embodiment, the same effect as that of the second embodiment can be obtained. In particular, the two flexible wires 47a and 47b are disc members. 4
By applying the structure in which 8 are stacked and inserted, the two flexible wires are always kept in a parallel state, and it is unlikely that a phenomenon in which the two flexible wires come close to each other and twist during the rotation operation. Therefore, rotation is smoothly transmitted. Further, since the twist is reduced, a thinner wire can be applied to the flexible wire, and the flexible wire can be easily bent.

Next, a modified example of the disk member 48 inserted into the flexible wire rod in the driving force transmission mechanism 45 of the fifth embodiment will be described. FIG. 14 is a vertical cross-sectional view showing a state where the disk members of the above-described modified example are overlapped. FIG.
As shown in FIG. 4, the disk member 48A of the modified example has parallel through holes 48Aa and 48Ab and a spherical projection 48Ac having a large radius at the center, that is, a spherical surface having a large radius of curvature. The disc member 48A is provided with the through hole 48A.
The two flexible wires 47Aa and 47Ab are inserted into the bending bearing 49 in a stacked state. In this assembled state, the disk member 48A rotates while the projections 48Ac are fitted into the projection concave portions of the counterpart disk member, and the disk member 48A rotates without any positional displacement between the disk members. Is transmitted.

The other structure and operation of the driving force transmission mechanism to which the disk member 48A of this modification is applied are the same as those of the fifth embodiment, and have the same effects, and in particular, the stacked circles. Since the plate members rotate with no mutual displacement, smoother transmission of the driving force can be realized.

Next, a driving force transmission mechanism which is a driving device of a camera according to a sixth embodiment of the present invention will be described. The driving force transmission mechanism of this embodiment also corresponds to the driving force transmission mechanism 8 shown in the first embodiment, similarly to the second embodiment, and is different from the driving side in which the axes are staggered with each other. The present invention can be applied as a driving force transmission mechanism between the sides, and can be applied as a driving device such as a film rewinding drive of a camera.

The bending bearings 36 and 49 of the fourth and fifth embodiments described above are replaced with the bending bearings 42 and 49 of the driving force transmission mechanisms 38 and 45 (shown in FIGS. 9 and 12). It is also possible to apply However,
In this case, it is necessary to bring the positions of the constrictions 36c, 36d, and 36e to a portion where the spherical member 41 or the disk member 48 is not located.

FIG. 15 is a perspective view of the driving force transmission mechanism 51 according to the sixth embodiment. As shown in FIG. 15, the driving force transmission mechanism 51 includes a spur gear 52 of a driven gear (first gear) driven by a driving source such as a motor (not shown).
And a transmission unit 53 of a plurality of driving force transmission elements assembled in a mutually engaged state, a flexible tubular bearing 54, and a driven gear (second gear) driven by the spur gear 52. And the worm 55. The axes of the spur gear 52 and the worm 55 are orthogonal to each other, and the worm 55 is positioned obliquely above the spur gear 52.

It is assumed that the spur gear 52 and the worm 55 are supported in a state where the respective hubs 52a and 55a are rotatably supported by bearings of a camera body (not shown). The hub 52a is provided with a projection 52b into which an engagement groove 53c of a transmission unit 53 described later is fitted. The hub 55a is provided with a groove 55b into which an engagement protrusion 53d of the transmission unit 53 described later is fitted.

The transmission member 53 is a spherical member provided with engaging projections and grooves, and is located above the spherical portion 53e as shown in the front view of FIG. 16A and the side view of FIG. The engaging projection 5 is flat in the X direction (the horizontal direction in FIG. 16A).
3d, the engagement groove 53 having a downward direction perpendicular to the X direction.
c has a pair of projections 53a and 53b.
The groove width of the engagement groove 53c is set to a dimension in which the engagement protrusion 53d can be slidably fitted.

The tubular bearing 54 is formed of a flexible tube, and its inner diameter is
Can be inserted in a state where an appropriate gap can be inserted. One end of the tubular bearing 54 can be inserted and fixed to the hub 52 a of the spur gear 52, and the other end can be inserted and fixed to the hub 55 a of the worm 55.

To assemble the driving force transmission mechanism 51, first, the engagement projection 53d of the transmission unit 53 of the first stage is used.
The second-stage transmission unit 53 is mounted by fitting the engagement groove 53c of the second-stage transmission unit 53 into the second transmission unit 53. By repeating the same engagement method, as many transmission units 53 as the number of transmission units 53 corresponding to the separation distance along the bending line between the spur gear 52 and the worm 55 are engaged with each other and stacked. Then, the tubular bearing 54 is placed over the plurality of transmission units 53 in the above-mentioned assembled state, and one end of the tubular bearing 54 is inserted into the hub 52 a of the spur gear 52 and the other end is inserted into the hub 55 a of the worm 55, and fixed. I do.

However, prior to the above-described insertion and fixation, the first-stage transmission unit 5 is attached to the projection 52b of the hub of the spur gear 52.
3 and the engagement protrusion 53 d of the transmission unit 53 at the final stage is connected to the hub 5 of the worm 55.
5a is fitted into the groove 55b. The tubular bearing 54 into which the plurality of transmission units 53 are inserted is a spur gear 5
It is attached in a state of being bent between 2 and the worm 55.

In the driving force transmitting mechanism 51 assembled as described above, when the spur gear 52 is rotationally driven by a driving system (not shown), the rotational force is applied to the engaging grooves 53 c of the plurality of transmitting units 53 and the engaging grooves 53 c. The worm 55 is transmitted to the worm 55 via the projection 53d and is driven to rotate.

According to the driving force transmission mechanism 51 of the sixth embodiment, the same effect as that of the second embodiment can be obtained. The driving force is transmitted in a state where the transmission units are engaged with each other and overlapped. Therefore, a large driving force can be transmitted more reliably from the driving side to the driven side in the direction in which the shaft centers cross each other in a state where the twisting in the driving force transmission unit is small.

In the driving force transmission mechanism of each of the second, third, fourth, fifth and sixth embodiments, the bending angle of the flexible wire on the driving side and the driven side is 90 °. Of course, the bending angle may be other than this, and the gist of the present invention is applicable even if the bending portion is not one but a plurality.

Next, a camera incorporating a driving device according to a seventh embodiment of the present invention will be described. FIG. 17 is a perspective view showing the periphery of the driving force transmission device of the camera according to the seventh embodiment in a see-through state. FIG. 18 is a sectional view of a guide roller applied to the driving force transmission device.

The camera is mainly composed of a camera body 61 having an aperture 61a, a lens barrel 62 fixedly supported by the camera body 61 and incorporating a photographic optical system, winding and rewinding of film, and driving of a lens. Motor 63, a drive switch mechanism 64, a film take-up spool 65, and a film engageable with a hub of a film cartridge to be loaded. A fork 66 for rewinding,
Driving force transmission mechanism 6 for driving a spool as a driving device
7 and a driving force transmission mechanism 68 for driving the fork.

The spool 65 is provided with a gear portion 65a for driving the spool. In addition, the fork 6
6 is provided with a worm wheel 66a for driving the fork.

The drive disconnection mechanism 64 includes a drive motor 63
A sun gear 71 meshing with a pinion 63a fixed to an output shaft of the sun gear, a rotating arm 72 rotatably supported on the shaft of the sun gear 71, and a rotating arm 7 meshing with the sun gear 71.
2 and a planetary gear 73 rotatably and revolvably supported. The planetary gear 73 can be switched to mesh with a spur gear 74 and a spur gear 75 of driven gears (first gears) constituting the driving force transmission mechanism portions 77 and 78 by its revolution.

The driving force transmission mechanism 67 is mainly a spur gear 74 and a driven gear (second gear) driven by the spur gear 74 and meshes with the worm wheel 65 a of the spool 65. A worm 77, a single elastically deformable flexible wire 76 having both ends secured to the respective hubs of the spur gear 74 and the worm 77, and connecting the two;
A guide roller 80 for holding the flexible wire 76 in a bent state.

Incidentally, the spur gear 74 and the worm 77 are
It is assumed that the camera body 61 is rotatably supported by a bearing (not shown) of the camera body 61 via the hub portion. The axis of the spur gear 74 and the axis of the worm 77 are located in the direction in which they intersect with each other. The flexible wire 76 is guided and held between the spur gear 74 and the worm 77 by a guide roller 80 in a bent state. Is done.

The driving force transmitting mechanism 68 is mainly the spur gear 75 and a driven gear (second gear) driven by the spur gear 75, and meshes with the worm wheel 66 a of the fork 66. A worm 79, both ends of which are fixed to the spur gear 75 and the hub of the worm 79, a single elastically deformable flexible wire 78 connecting the two, and the flexible wire 78 is held in a bent state. And two guide rollers 80.

The spur gear 75 and the worm 79 are
It is assumed that it is rotatably supported by a bearing (not shown) of the camera body 61a via the hub portion. The axis of the spur gear 75 and the axis of the worm 79 are located in mutually offset directions, and the flexible wire 78 moves the spur gear 75 and the worm 79 between the two guide rollers 8.
It is guided and held in a state of being bent by 0.

FIG. 18 is a longitudinal sectional view around the guide roller 80. The guide roller 80 is a drum-shaped roller, and is rotatably or fixedly supported on a support shaft 80a screwed to a support portion 61b of the camera body 61. The flexible wire 76 or 78 is held in a state where its bent portion is in contact with the narrow portion at the center.

The film winding and rewinding driving operations of the camera according to the seventh embodiment configured as described above will be described. First, when film winding is performed, the drive motor 23 is turned counterclockwise (output shaft side). ), And the planetary gear 73 of the drive switching mechanism 64
Are meshed with the spur gear 74. The flexible wire 76 is torsionally driven via the spur gear 74 to rotate the worm 77 and further the worm wheel 65a to drive the spool 65 to wind up the film.

When rewinding the film, the drive motor 63 is driven clockwise (as viewed from the output shaft side),
The planetary gear 73 of the drive switching mechanism 64 meshes with the spur gear 75. The flexible wire 78 is torsionally driven through the spur gear 75 to rotate the worm 79 and further the worm wheel 66a to drive the fork 66 through a film cartridge hub engaged with the fork 66. To rewind the film.

According to the camera of the seventh embodiment described above, the driving force transmission mechanism 6 using a flexible wire as a driving shaft for film winding and rewinding drive.
The use of 7, 68 eliminates the need to use many gear trains, straight drive shafts, and the like as in the conventional drive device.
It is easy to accommodate the driving device below the camera, and the camera can be made compact.

Next, a camera incorporating a driving device according to an eighth embodiment of the present invention will be described. FIG. 19 is a perspective view showing the periphery of the drive device of the camera according to the eighth embodiment in a see-through state.

The camera is mainly composed of a camera body 81 having an aperture portion 81a, a lens barrel 82 fixedly supported by the camera body 81 and containing a photographic optical system, a film winding and rewinding film, and an optical system. A drive motor 83 which is a horizontal drive (output shaft is horizontal) as a driving source for driving, a gear reduction mechanism 86, a driving force transmission mechanism 87 for driving a finder optical system as a driving device, and a zoom Viewfinder cam 8 for driving the viewfinder optical system forward and backward
8 and two finder lenses 89, which constitute a zoom finder optical system and can advance and retreat in the direction of the finder optical axis Of.
90 and a spool 84 for winding up the film. The camera can be loaded with a film cartridge 85.

The gear reduction mechanism 86 includes a two-stage gear 91 mainly composed of gears 91a and 91b meshing with a pinion 83a fixed to the output shaft of the drive motor 83, and a gear 92a meshing with the two-stage gear 91. Two-stage gear 9 composed of 92b
And 2.

The driving force transmission mechanism 87 is a first driven member rack 93 that is slidable mainly in the vertical direction (in FIG. 19) with respect to the camera body 81, and is slidably driven by the rack 93. The flexible wire 94 is inserted through the flexible wire 94, fixedly supported by the camera body 81, and has a high rigidity bending bearing 95 through which the flexible wire 94 is slidably inserted, and the camera body 81. And a second driven unit rack 96 slidable in the left-right direction (on FIG. 19).

The rack 93 has guide grooves 93a and 93b along the longitudinal direction into which the guide pins 81b of the camera body 81 are slidably fitted.
2b. The rack 96 has guide grooves 96a and 96b along the longitudinal direction into which the guide pins 81c of the camera body 81 are slidably fitted, and meshes with the pinion 88a of the finder cam 88.

The flexible wire 94 is a single elastically deformable wire, and an elastically deformable metal wire such as a piano wire or a stainless steel wire is applied. The wire 94
The drive-side end is fixed to the rack 93, and after the bending bearing 95 is bent at 90 ° and inserted, the driven-side end is fixed to the rack 96.

The finder cam 88 is connected to the camera body 8.
1 is a cylindrical cam rotatably supported, has a pinion 88a meshed with the rack 96 for rotation drive, and has two cam grooves 88b and 88c.
The driven pins of the finder lenses 89 and 90 are slidably fitted in the cam grooves 88b and 88c.

A description will be given of the forward / backward driving operation of the zoom finder optical system in the camera of the eighth embodiment configured as described above. The drive motor 23 is driven, and the rack is driven via the gear 92 b of the drive switching mechanism 86. 93 is driven straight up and down. The flexible wire 94 moves inside the bending bearing 95, and drives the rack 96 straight ahead in the left-right direction. The finder cam 88 is rotated by the movement of the rack 96, and the finder lenses 89 and 90 are driven forward and backward.

According to the camera of the eighth embodiment described above, the driving force transmission mechanism 87 using a flexible wire for driving the finder optical system is used to drive the finder optical system forward and backward. There is no need to use a gear train or a straight drive shaft, etc., so that the occupied space is small and the camera can be made compact.

In the examples using a wire in each of the above embodiments, the wire may be a straight wire or a drawn wire as long as it is flexible.

Based on the above-described embodiment, the following configuration can be proposed: (1) In a camera driving device, a first motor driven by receiving a driving force of the motor and the motor. A second driven unit inside the camera and driven by receiving the driving force from the motor via the first driven unit; and a first driven unit A metallic flexible wire that mechanically connects the first driven section and the second driven section to transmit a driving force from a driving section to the second driven section. Components,
It is possible to propose a camera driving device characterized by having the following.

[0118]

As described above, according to the camera driving apparatus of the present invention, the driving force can be transmitted to the driven portion without using a large number of gears as in the conventional apparatus. As a result, the space inside the camera can be saved, and the camera can be further reduced in size.

[Brief description of the drawings]

FIG. 1 is a perspective view of the inside of a camera incorporating a driving device according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part in a see-through state of a gear box which is a moving frame driving mechanism of the camera according to the first embodiment.

FIG. 3 is a longitudinal sectional view of a driving force transmission mechanism that is a camera driving device according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view showing one of a fixed structure of a gear and a shaft applied to the driving force transmission mechanism of the second embodiment.

FIG. 5 is an exploded perspective view showing another fixed structure of a gear and a shaft applied to the driving force transmission mechanism of the second embodiment.

FIG. 6 is an exploded perspective view showing a fixing structure of a modified example of a spur gear and a flexible wire with respect to the driving force transmission mechanism of the second embodiment.

FIG. 7 is a perspective view of a driving force transmission mechanism that is a driving device of a camera according to a third embodiment of the present invention.

FIG. 8 is a view showing a shape of a bending bearing according to a modified example of the driving force transmission mechanism of the second and third embodiments, wherein FIG. 8 (A) is a side view and FIG. FIG.

FIG. 9 is a perspective view of a driving force transmission mechanism which is a camera driving device according to a fourth embodiment of the present invention.

FIG. 10 is a diagram showing a shape of a spherical member applied to the driving force transmission mechanism of the fourth embodiment, and FIG.
Is a perspective view, and FIG. 10B is a longitudinal sectional view.

11A and 11B are diagrams showing a shape of a cylindrical member according to a modified example of the spherical member applied to the driving force transmission mechanism of the fourth embodiment, wherein FIG. 11A is a perspective view and FIG. Is a longitudinal sectional view.

FIG. 12 is a perspective view of a driving force transmission mechanism that is a driving device of a camera according to a fifth embodiment of the present invention.

FIG. 13 is a diagram showing a shape of a disk member applied to the driving force transmission mechanism of the fifth embodiment, and FIG.
Is a perspective view, and FIG. 13B is a longitudinal sectional view.

FIG. 14 is a longitudinal sectional view of a disk member of a modified example of the driving force transmission mechanism of the fifth embodiment.

FIG. 15 is a perspective view of a driving force transmission mechanism which is a camera driving device according to a sixth embodiment of the present invention.

FIG. 16 is a diagram showing a shape of a transmission unit applied to the driving force transmission mechanism of the sixth embodiment, and FIG.
(A) is a front view, and FIG. 16 (B) is a side view.

FIG. 17 is a perspective view of a camera including a driving force transmission device as a driving device according to a seventh embodiment of the present invention in a see-through state showing the periphery of the driving force transmission device.

FIG. 18 is a longitudinal sectional view of a guide roller applied to the driving force transmission device of the seventh embodiment.

FIG. 19 is a perspective view showing a periphery of a driving device of a camera including a driving force transmitting device which is a driving device according to an eighth embodiment of the present invention.

[Explanation of symbols]

3, 63, 83... Drive motors (motors) 7a, 8a, 16, 32, 39, 46, 52, 74, 7
5 ... spur gear (driven gear, first gear) 8c, 39, 43, 50, 55, 77, 79 ... worm (driven part, second gear) 20, 20A, 35 ... spur gear (Driven part, second gear) 12h ... Coupling member (Driven part) 7b, 8b, 17, 17A, 33a, 33b, 33c,
37, 40a, 40b, 47a, 47b, 47Aa, 4
7 Ab, 76, 78, 94... Flexible wire (flexible wire member) 53... Transmission unit (driving force transmitting element) 93... Rack (driven gear, first gear) 96. Driven part, second gear)

Claims (5)

[Claims] 1. A driving device for a camera, comprising: a motor; a driven gear driven by receiving a driving force of the motor; and a driving gear provided inside the camera and transmitted from the motor via the driven gear. A driven part driven by receiving a driving force; and a metal for mechanically connecting the driven gear and the driven part to transmit the driving force from the driven gear to the driven part. A camera driving device comprising: a flexible wire member. 2. A driving device for a camera, comprising: a motor; a driven gear driven by receiving a driving force of the motor; and a driving gear provided inside the camera and transmitted from the motor via the driven gear. A driven part driven by a driving force; and a plurality of mechanically coupled driving gears and the driven part for transmitting the driving force from the driven gear to the driven part. A driving device for a camera, comprising: a driving force transmission element according to (1). 3. A driving device for a camera, comprising: a first gear; a second gear; and a first gear and a second gear for transmitting a rotational force from the first gear to the second gear. And a flexible wire member for mechanically connecting the second gear and the second gear. 4. The camera driving device according to claim 3, wherein at least the first gear or the second gear is movable in the camera space. 5. A driving apparatus for a camera, comprising: a first gear, a second gear, and a first gear and a second gear for transmitting torque from the first gear to the second gear. And a plurality of driving force transmission elements for mechanically connecting the second gear to the second gear.