JPH0862690A - Driving part supporting structure for camera - Google Patents

Abstract

PURPOSE: To minimize the shake of the driving unit of a camera by arranging elastic members used for fitting and holding the driving part of the camera to the camera at least in two almost orthogonally crossed directions. CONSTITUTION: The driving part of the camera is supported by a camera main body 1 through rubber bushes 16, 18 and 19-22 being the elastic members. Then, the rubber bushes are arranged so as to be assembled from the plural directions being at least two or more almost orthogonally crossed directions. By constituting them in such a way, fluctuation in a plane surface direction including two directions can be suppressed when the rubber bushes are arranged in two orthogonally crossed directions, for example. Besides, when they are arranged in three almost mutually orthogonally crossed directions, the omnidirectional shake can be spatially suppressed-To put it concretely, the bush 18 and the bush 16 are arranged so as to be orthogonally crossed to each other and also orthgonally crossed to the bushes 19-22. Thus, the fluctuation of a driving unit main body 4 is suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for supporting a drive unit such as a motor on a camera.

[0002]

2. Description of the Related Art Conventionally, a structure is known in which a drive unit and a camera body are joined via a rubber bush in order to prevent drive vibration of a drive unit of a camera including a motor from propagating to the camera body. There is. The shape of the rubber bush used in the camera is such that the outer circumference of the cylindrical rubber engages with the base plate of the unit.To support the unit on the camera body, use the hole in the center of the rubber bush. It is assembled through a bush using a stepped screw that fits.

[0003]

The support system constructed as in the above-mentioned conventional example has the following problems. That is,
In order to obtain a sufficient vibration isolation effect, the material of the rubber bush must be of low hardness (soft). Therefore, with such a structure, the mounting support rigidity of the unit is extremely high. It will be low. Therefore, when the motor in the unit is driven, the entire unit swings due to the driving reaction force. If the shake is large when the unit swings, the unit may come into contact with a part of the camera body when the unit is driven and make a contact noise, or the drive vibration may be directly transmitted in the contact condition to generate noise. There is a problem of being lost.

Further, when the unit is constructed so as to work in cooperation with another operating mechanism in the camera, there is a large amount of shake during driving, causing mechanical failure in the drive transmission system and causing malfunction. Occurs. Therefore, conventionally, in order to solve such a problem, the number of rubber bushes used at the same time is increased by increasing the number of supporting points of the drive unit to reduce the swing of the unit. However, in the normal configuration inside the camera, the rubber bushes are arranged in the same direction, so that even if the number of bushes is increased, the direction of the rubber bushes is changed even if the number of bushes is increased. Therefore, there is a problem in that it easily swings in a specific direction.

An object of the present invention is to solve the above-mentioned problems, that is, a structure in which a drive unit is supported by a camera through a rubber bush, and the unit can be used even if the number of rubber bushes used is reduced. A method for arranging a rubber bush to minimize the vibration of the unit during driving is presented.

[0006]

For the above-mentioned purpose, the present invention is to support a driving portion of a camera on a camera body via an elastic member such as a rubber bush, and the rubber bush is arranged. The assembly is performed from at least two directions that are substantially orthogonal to each other. With such a configuration, for example, by arranging the rubber bushes in two directions that are orthogonal to each other, it is possible to suppress swinging in a plane direction including these two directions. If so, it is possible to suppress the shake in all directions spatially.

[0007]

FIG. 1 shows an embodiment in which the present invention is applied to a rewinding mechanism of a camera. In FIG. 1, reference numeral 1 is a camera body, 2 is a front plate of the camera, and a lens mount 3 is fixedly mounted on the camera body 1. Reference numeral 4 is a drive unit main body, and 5 is a drive motor. Gear trains 6, 7, 8, 9, and 10 transmit the power of the motor 5. A rewinding fork 11 is held by the main plate 12 so as to rotate in association with the gear 10. 13,
Reference numeral 14 is a base plate, and the base plate 13 holds the gear 7 rotatably and prevents the gear 8 axially supported by the drive unit body 4 from coming off. The base plate 14 holds the base plate 12 and prevents the gear 9 from coming off. Main plate 13, 14
Is fixed to the drive unit body 4 by the mounting screws 15a and 15b. The base plate 14 has a bush mounting hole 14a, and a rubber bush 16 is mounted therein. A bottom plate 17 is fixed to the drive unit body 4 and has a bush mounting hole 17a. A rubber bush 18 is attached to the bush attachment hole 17a. 19-22
Is a rubber bush attached to the drive unit body 4, and is attached to a bush attachment hole of the drive unit body 4. The attachment to the camera body 1 and the front plate 2 will be described. The drive unit body 4 is a rubber bush 16,1.
It is attached via 8, 19-222. From above the drive unit main body 4, it is fixed to the camera main body 1 together with the main plates 13 and 14 by the step screw 23 via the rubber bush 16. From the front of the unit, rubber bush 1
It is attached to the camera body 1 by a step screw 24 via 8. From the side surface of the unit, the bushes 19 to 21 are attached to the front plate 2 by step screws 25 to 27. The rubber bush 22 is structured not to be tightened by the step screw but to be fitted to the protrusion 2a of the front plate 2.

FIG. 2 is a sectional view showing the mounting structure of the rubber bush used in this embodiment.

In FIG. 2, reference numeral 31 is a cylindrical rubber bush having flanges 31a and 31b. A base plate 32 has a rubber bush 31 fitted therein, and has a structure in which the rubber bush 31 is supported by flanges 31a and 31b. Reference numeral 33 is a mounting step screw, and 34 is a camera body.

Next, the operation of the mounting and supporting method in this embodiment will be described. In the rubber bush structure shown in FIG. 2, when the base plate 32 is oscillated in the direction of arrow A, the rubber in the space sandwiched between the base plate 32 and the step screw 33 is compressed. In this case, since the rubber having a relatively thin thickness is compressed and the compressed rubber is deformed within the limited space of the bush mounting hole of the base plate 32, the deformation amount is small. On the other hand, when the ground plate 32 is swayed in the direction of arrow B, the flanges 31a and 31b of the rubber bush 31 are similarly compressed, but the flange of the bush normally has a thickness smaller than that of the cylindrical portion for vibration isolation. Since the flange is not thick and the periphery is not surrounded, it tends to allow a large deformation. A description will be given of the operation when the bush group having such a supporting rigidity is arranged as shown in FIG.

As described above, the drive unit main body 4 has the bushes 19 to 22 and the screws 25 to 2 for securing the mounting strength.
It is attached to the front plate 2 from one direction by 7. When this unit is driven, the moment applied to the unit is
It is generated by a driving reaction force when the fork 11 rewinds a film (not shown), and the direction thereof is an arrow C which is a direction opposite to the rotation direction of the fork 11. Therefore, the unit receives a force so as to be swung about the fork 11 as a center, and the direction thereof corresponds to the direction of the arrow B shown in FIG. Therefore, if only the bushes 19 to 22 are used for mounting the unit, the drive unit main body 4
The base plates 13 and 14 swing together, and the motor 5 and the drive unit main body 4 collide with the front plate 2 and the main body 1. On the other hand, in the present embodiment, the bush 18
And the bushes 16 are arranged so as to be orthogonal to each other and also to the bushes 19 to 22. 2 in the direction of arrow C and for the bushes 18, 16.
Since it corresponds to the direction A, the swing of the drive unit body 4 can be suppressed.

[0012]

As described above, according to the present invention,
The structure is such that the driving portion of the camera is supported on the camera main body through an elastic member such as a rubber bush, and the arrangement of the elastic member such as the rubber bush is in at least two substantially orthogonal directions. Even if the drive unit is supported by the number of rubber bushes, it is possible to minimize the swing of the unit due to the driving reaction force when the unit is driven.

[Brief description of drawings]

FIG. 1 is a diagram for explaining support of a rewinding mechanism drive unit of a camera, which is an embodiment of the present invention, on the camera.

FIG. 2 is a diagram illustrating a rubber bush mounting structure.

[Explanation of symbols]

 1 camera body 2 camera front plate 4 drive unit 5 motor 12, 13, 14 base plate 16, 18, 19 to 22, 31 rubber bush

Claims (1)

[Claims] 1. A drive unit support structure for a camera, wherein a drive unit of a camera is attached to and held by the camera via an elastic member, wherein the elastic members are arranged in at least two directions that are substantially orthogonal to each other.