JPH0728141A - Camera - Google Patents

Abstract

PURPOSE:To provide a silent camera with which the sound generated by the drive of a motor is decreased. CONSTITUTION:A camera concerned includes a motor 1 which is equipped with a reduction gear 2 in a single piece and installed in a film takeup spool 5, and the output of the reduction gear 2 is transmitted to the spool 5 through a transmitting means to conduct film taking-up, wherein the bottom of the spool 5 is borne rotatably on the outer cylinder of the reduction gear while the top of spool is borne by an upper base plate 7, and on the lower base plate 6, the reduction gear 2 is supported fast on the camera body side with a vibration isolation rubber 3 interposed. Also the upper base plate 7 is secured to the camera body 8 through vibration isolation rubber 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera in which a film winding mechanism driven by a motor with a speed reducer is soundproofed.

[0002]

2. Description of the Related Art In recent years, various proposals have been made for noise reduction measures for cameras, and in the film winding mechanism shown in FIG. 4, a speed reducer 2 is integrally attached to a motor 1 which is a drive source, Tooth contact noise of the transmission gear near the motor, which is one of the causes of noise generated during driving, is reduced by the speed reducer 2. Specifically, by making the transmission gear train a closed structure, The sound of hitting the teeth is blocked.

In this film winding mechanism, the speed reducer 2 is screwed to the base plate 6 with screws 16 and the upper base plate 7 is screwed to the camera body 8 with screws 17, and the take-up spool 5 is wound around the base plate 6. Is rotatably supported, and the spool 5 is rotationally driven via a transmission means (not shown) that meshes with the output gear 9 of the reduction gear 2. Reference numeral 15 indicates a spool chamber.

[0004]

However, in the above-mentioned conventional film winding mechanism, although a measure for reducing the tooth contact noise of the gear is taken, the motor vibration resonates with other members. No measures have been taken to generate the sound, and the sound generated during the driving of the motor could not be sufficiently reduced.

An object of the present invention is to provide a camera capable of further reducing the noise generated by driving a motor and reducing noise.

[0006]

As described in the claims, a structure for realizing the object of the present invention has a motor with a speed reducer built in a film take-up spool, and the output of the speed reducer is In a camera for transmitting a film to a spool through a transmission unit to wind a film, one end of the spool is rotatably supported by an outer cylinder of the speed reducer, and the other end of the spool is One main plate is pivotally supported, the first main plate is attached to the camera body via a vibration isolating member, and the speed reducer is supported and fixed to the camera main body side via a vibration isolating member. Since the motor is supported in a floating state with respect to the camera body via the vibration isolating member, it is possible to prevent vibration during driving of the motor from being transmitted to other constituent members of the camera body.

[0007]

1 to 3 show an embodiment of the present invention.

Reference numeral 1 denotes a motor integrated with the speed reducer 2, which enlarges the outer shape of the lower part (output side) of the speed reducer 2 and slidably fits the lower part of the film take-up spool 5 to this large diameter portion. The large diameter portion is used as a bearing so that the spool 5 can rotate.

Reference numeral 6 denotes a feed base plate which constitutes a gear train for transmitting a driving force to the take-up spool 5. The speed reducer 2 is attached to the feed base plate 6 by means of a screw 18 via a vibration-proof rubber 3. There is. Reference numeral 7 denotes an upper feeding base plate, which is formed with a fitting portion 7a into which the upper portion of the motor 1 is fitted and a bearing portion 7b into which the upper portion of the spool 5 is slidably fitted. The motor 1 is attached to the camera body 8 by 14, and the upper portion of the motor 1 is fitted into the fitting 7a to prevent the motor 1 with reduction gear from falling down. Thus, the spool 5 is held in a floating state and the spool 5 is rotatably supported by the motor 1 with a speed reducer as a bearing, so that the vibration is prevented from being transmitted to other members.

On the other hand, the speed reducer 2 is, as shown in FIG.
It is attached to the motor 1 with screws 19. Reference numeral 1a is a motor pinion gear fixed to the motor 1, 2a is an internal gear integrally formed with the outer cylinder of the speed reducer, 2b is a planet gear that revolves in the same rotation direction as the motor pinion gear 1a, and the rotational force of this planet gear is The output gear 9 of the reduction gear transmission is transmitted. When the output gear 9 rotates counterclockwise,
As shown in FIG. 2, the sun gear 10 rotates clockwise,
The planetary gear 11 and the reduction gear 12 mesh with each other, and the spool 5 rotates clockwise through the reduction gear 13 to wind up the film.

With respect to the tooth contact noise of the first-stage system gear generated during the driving of the motor in the above operation, the speed reducer 2 has a substantially closed structure to block the sound, and the motor with the speed reducer and the take-up spool are described above. As described above, the vibration-proof rubbers 3 and 4 prevent the vibrations from being transmitted to the other structural members. Therefore, it is possible to prevent the unpleasant noise generated by the vibration of the motor resonating with the other structures.

Further, since the outer diameter of the speed reducer 2 is the lower bearing of the spool 5, the inner diameter of the spool can be configured to be close to the outer diameter of the drive motor, and the size can be reduced.

[0013]

As described above, according to the present invention,
Since the motor with speed reducer is held by the anti-vibration rubber suspended from other structures of the camera body, vibration noise generated while driving the motor is suppressed, and the bearing under the film take-up spool is used as the speed reducer. Since it is also used, the rotational vibration of the spool can be blocked and the inner diameter of the spool can be made small, so that the effect of miniaturization is great.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

2 is a plan view showing the film feeding and transmitting system of FIG. 1. FIG.

3 is a plan view showing gears of the reduction gear transmission of FIG. 1. FIG.

FIG. 4 is a sectional view showing a conventional film winding mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 2 Reduction gear 3, 4 Anti-vibration rubber 5 Winding spool 6 Winding base plate 7 Winding upper base plate 8 Camera body 9 Output gears 10-13 Reduction gears 14, 18 Stage screws 15 Spool chambers 16, 17 screws

Claims (1)

[Claims] 1. A camera for winding a film, wherein a motor with a speed reducer is built in a film take-up spool, and an output of the speed reducer is transmitted to the spool through a transmission means to wind a film. Is rotatably supported by the outer cylinder of the speed reducer, the other end of the spool is supported by a first base plate, and the first base plate is attached to the camera body via a vibration isolating member. A camera characterized in that the speed reducer is supported and fixed to the camera body side via a vibration-proof member.