JPH08193458A - Damper - Google Patents

Abstract

PURPOSE: To lightly operate one direction, and gently operate the other one direction, in a door opening-closing operation. CONSTITUTION: In a damper 1, blade members 6 to rotate at a prescribed angle to a rotary body 4 are arranged in a radial shape on the peripheral edge of the rotary body 4 in a housing 3 in which a viscous fluid 2 is filled. When the rotary body 4 rotates in one direction, the blade members 6 rotate to the rotary body 4 so that a radius from the center of a rotary shaft 5 becomes maximum, and increase viscous resistance of the viscous fluid 2. When the rotary body 4 rotates in the other one direction, they rotate to the rotary body 4 so that the radius becomes minimum, and reduce viscous resistance of the viscous fluid 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper used for opening and closing a cassette holder of a cassette deck, a door of an operating portion of an audio product, and the like.

[0002]

2. Description of the Related Art A door that covers the cassette holder of a cassette deck, the operation part of an audio amplifier, or the door of a glove box of an automobile, etc. Since it opens abruptly, a damper that is linked to the opening and closing of the door is used. FIG. 4 is a diagram for explaining the operation of the damper applied to the cassette holder. In the figure, the cassette holder 14 is opened / closed with respect to the main body 15 of the cassette deck about the opening / closing shaft 16 to store and discharge the cassette. As the cassette holder 14 is opened and closed, the rack 17 moves up and down and the gear 13 to which the rack 17 is coupled causes the rotating body in the damper 1 ″ to rotate about the rotating shaft 5 ″, thereby transmitting the damping effect to the cassette holder.

FIG. 5 is a perspective view showing a conventional example of a damper. In the figure, a damper 1'has a housing 3'filled with a viscous fluid 2 and a rotary body 4'in which a plurality of blade members 6'are radially mounted integrally on the periphery of the housing 3 '. Rotational force from the outside of the housing 3'is caused by the rotating shaft 5'projecting from the rotating body 4'to the outside of the housing 3 '.
Conveyed to. Since the blade member 6'rotates in the viscous fluid 2, the blade member 6'receives viscous resistance to smooth the rotation, and smoothes the opening / closing operation of the connected cassette holder 14.

[0004]

However, when the rack 17 is moved up and down by the opening / closing operation of the cassette holder 14 and the rotating body 4'in the damper 1'rotates in both directions, the blade members 6'will not move. Since it is fixed to the rotating body 4 ', the viscous resistance received from the viscous fluid 2 is constant in any direction, and when the cassette holder 14 is opened, the operation becomes slow and smooth, and the damping effect of the damper 1'is obtained. Although it is obtained, when the cassette is inserted into the cassette holder 14 and the cassette holder 14 is closed, the damping effect of the damper 1'behaves similarly to when it is opened, so that the operation is slow and cannot be closed quickly. There was a problem to say.

[0005]

In order to solve the above-mentioned problems, a rotating body is housed in a housing filled with a viscous fluid to obtain a damping effect of the rotation of the rotating body. There is provided a damper, which is provided with a wing member that opens and closes at an axis line having a predetermined distance from the axis line of the body and substantially parallel to the axis line of the body and that shifts a predetermined angle with respect to the peripheral edge of the rotating body.

[0006]

In the housing filled with the viscous fluid of the damper, the blade member rotates in accordance with the rotating direction of the rotating body, and one direction of rotation increases the radius of rotation of the blade member, thus increasing the viscous resistance, and the other direction. Can reduce the radius of rotation of the wing member, thus reducing the viscous resistance and giving directionality to the damping effect of opening and closing the door etc. For example, when the door is opened, it slowly opens and closes due to the operation with large viscous resistance. At times, it can be closed quickly with a small viscous resistance.

[0007]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the structure of the damper of the present invention. FIG. 2 is a partial view for explaining the radius of gyration of the wing member due to the rotation of the wing member of the damper of the present invention. 3A and 3B are plan views illustrating the operation of the damper of the present invention. FIG. 3A is an operation when the blade member is open, and FIG. 3B is an illustration when the blade member is closed.

In FIG. 1, a damper 1 has a housing 3 filled with a viscous fluid 2 and a rotary shaft 5 integrally coupled with a rotary body 4 housed therein. One end of the rotary shaft 5 is located outside the housing 3. It is protruding. Further, a plurality of holes 7 are formed near the outer circumference of the rotating body 4 in parallel with the rotating shaft 5 and are cut out at a predetermined angle at the peripheral edge of the rotating body 4, and a pivot shaft 8 provided at one end of the blade member 6 is provided. The blade member 6 is rotatable around the peripheral edge of the rotating body 4. A curved portion is provided at the tip of the wing member 6.

FIG. 2 shows the positional relationship with respect to the rotary shaft 5 when the wing member 6 rotates about the pivot 8. The stopper A is provided at a position where the radius of rotation from the center of the rotary shaft 5 to the tip of the blade member 6 is maximized in one direction of rotation. At this time, the sum of the distance a between the rotary shaft 5 and the pivot 8 and the blade member length (the length from the pivot 8 to the tip of the blade member 6) b is equal to the radius of rotation c from the rotary shaft 5 to the tip of the blade member 6. Become.
The stopper B determines the other rotation end, and the rotation radius d from the rotation shaft 5 to the tip of the blade member 6 becomes smaller than the rotation radius C.

FIG. 3A shows a state in which the rotary body 4 is rotated counterclockwise as indicated by the arrow. The wing member 6 receives the viscous resistance of the viscous fluid 2 and rotates clockwise about the pivot axis 8 and is stopped at a position where the turning radius of the tip of the wing member 6 is maximum by the stopper A9. Since it is curved on the receiving side, it receives the maximum viscous resistance A10. FIG. 3B shows a state when the rotating body 4 is rotated clockwise as shown by the arrow. The blade member 6 receives the viscous resistance of the viscous fluid 2, rotates counterclockwise about the pivot axis 8 and is stopped by the stopper B12 so that the turning radius of the tip of the blade member 6 becomes smaller than the maximum. The viscous resistance B11 is smaller than the viscous resistance A10 because the viscous resistance B11 is warped on the side where

In order to increase the ratio between the viscous resistance A10 and the viscous resistance B11, the ratio c / d between the radius gyration c and the radius gyration d in FIG. 2 may be increased. Further, the gap between the blade member 6 and the housing 3 in FIG. 3A is reduced, the viscous resistance between the blade member 6 and the viscous fluid 2 and between the viscous fluid 2 and the housing 3 is increased, and the blade member 6 has a large viscosity. You can get resistance. In the above description, the curved shape of the wing member 6 has been described, but the directionality of the damping effect can be similarly obtained even when the blade member 6 has a flat plate shape. Further, in the above embodiment, the wing member 6
The case where the rotary body 4 rotates about the pivot axis 8 has been described, but this is the same operation as opening and closing of the hinge, and the rotor 4 and the blade member 6 are connected by the hinge member, and the blade member 6 is stopped by the stopper A.
9 and the stopper B12 may be displaced.

The operation of the damper of the present invention will be described with reference to FIG. A case will be described in which a gear is attached to the rotary shaft 5 protruding from the housing 3 of the damper 1 in FIG. 1 and the gear is applied to open and close the cassette holder 14 of the cassette deck in FIG. When the cassette is inserted into the cassette holder 14 in the open state and the cassette holder 14 is closed, the rack 17 is lowered and the gear 13 rotates the rotating shaft 5 ″ of the damper 1 ″ in the clockwise direction. Viscous resistance is small,
The cassette can be loaded with a small force. When the eject button (not shown) is pressed after the cassette is finished playing, the cassette holder 14 enters the opening operation by the force of the spring 18 and goes up, the rack 17 also goes up, and the gear 13 moves the rotary shaft of the damper 1 ". , The cassette holder 14 is slowly lifted because it is rotated counterclockwise and receives a large viscous resistance.

[0013]

As described above, according to the present invention, by providing a rotatable wing member on the peripheral edge of the rotating body in the housing filled with the viscous fluid, the wing member is provided in one rotation direction of the rotating body. A large viscous resistance is applied to the blade member and a small resistance is applied to the blade member in the other rotating direction, so that a damper having a rotating directionality can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a damper according to the present invention.

FIG. 2 is a partial view for explaining the radius of gyration of the wing member due to the rotation of the wing member of the damper of the present invention.

FIG. 3 is a plan view explaining the operation of the damper of the present invention. (A) is a figure explaining operation | movement when a wing member opens. (B) is a figure explaining operation | movement when a wing member is closed.

FIG. 4 is a diagram illustrating an operation of a damper applied to open / close a cassette holder.

FIG. 5 is a perspective view showing the structure of an example of a conventional damper.

[Explanation of symbols]

 1, 1 ', 1 "Damper 2 Viscous fluid 3, 3' Housing 4, 4'Rotator 5, 5 ', 5" Rotating shaft 6, 6'Wing member 7 Hole 8 Axis 9 Stopper A 10 Viscous resistance A 11 Viscosity Resistance B 12 Stopper B 13 Gear 14 Cassette holder 15 Main body 16 Opening / closing shaft 17 Rack 18 Spring

Claims (1)

[Claims] 1. A damper configured to accommodate a rotating body in a housing filled with a viscous fluid so as to obtain a damping effect of rotation of the rotating body, the damper being substantially parallel to the axis of the rotating body at a predetermined interval. A damper, characterized in that a wing member which is opened and closed by an axis line and is displaced by a predetermined angle with respect to the peripheral edge of the rotating body is attached.