JPS6319987Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulator device used for elastically supporting a record player.

In order to protect a record player or the like from external vibrations, it is common practice to place the record player or the like on a vibration isolating member. As this vibration isolating member, an elastic body having an appropriate elastic loss, such as a rubber spring or a gel-like substance, is widely used these days. However, if such a conventional insulator device having an elastic body is designed to have a relatively small spring constant in the vertical direction and to lower the resonance frequency, the spring constant in the lateral direction will also inevitably become small. As a result, when a turntable with a large mass is rotated, the cabinet of the record player is subjected to a large reactionary rotational shock due to the rotational torque. Such impact has sometimes had an adverse effect on the performance operation and playback characteristics of the record player.

The present invention has been developed in view of such conventional problems, and particularly in an insulator device in which vibrations in the vertical direction are absorbed by an elastic body interposed between a fixed frame and a movable frame. By interposing an elastic member between the fixed frame and the movable frame, which moves in response to the vertical movement of these frames and acts elastically in response to the horizontal movement, it is possible to It is an object of the present invention to provide an insulator device that effectively suppresses the shock to the cabinet as described above.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an insulator device according to the present invention, in which 1 is a movable frame, and 2 is a fixed frame that slides and guides the movable frame 1 in the vertical direction. First, fixed frame 2
has a double cylindrical shape, and is constructed by concentrically planting an outer cylinder wall 4 and an inner cylinder wall 5 of different diameters on a bottom plate 3, and has a wall at the upper end of each cylinder wall 4, 5. A locking edge 6 that restricts the lifting of the locking edge of the movable frame 1 and a locking edge 7 that prevents escape of an elastic member made of a plurality of rubber balls, which will be described later, are integrally provided. Further, a gel material G having a predetermined viscous resistance, such as polybdenum, is accommodated in the ring-shaped container 8 between the respective cylindrical walls 4 and 5. On the other hand, the movable frame 1 has an inverted pan shape so as to cover the upper opening of the fixed frame 2, and a locking edge 9 is provided on the edge of its outer peripheral wall in a ring shape projecting in the inner diameter direction. It is adapted to be engaged with the lower surface of the locking edge 6. Further, a guide rod 11 is projectingly hung from the center lower surface of the upper plate 10 of the movable frame 1, and the lower part of the guide rod 11 is inserted into the cylindrical wall 5. The guide rod 11 in the cylinder wall 5 is provided with two large and small guide protrusions 12 and 13.
An elastic member, in this embodiment, a plurality of rubber balls 14 and 15, is interposed between the guide protrusion 12, the locking edge 7, and the guide protrusions 12 and 13, and is brought into contact with the inner cylinder wall 5 and the guide rod 11. has been done. These rubber balls 14, 15 are connected in a ring shape with a thin joint 16, as shown in FIG. Reference numeral 17 denotes an elastic body, which is a coil spring in this embodiment, which is interposed between the movable frame 1 and the fixed frame 2 and urges them apart from each other.
The coil spring 17 is immersed in the gel material G in the cylindrical wall 5, thereby making the coil spring 17 loose. The fixed frame 2 is installed, for example, on the upper surface of the floor 18, and the upper surface of the movable frame 1 supports the bottom surface of the player's cabinet 19. Further, the rubber balls 14 and 15 prevent the guide rod 11 and the guide protrusions 12 and 13 from coming into direct contact with the cylindrical wall 5.

In the insulator structure having such a configuration, the vertical spring constant is determined by the coil spring 17 and the gel material G, and the horizontal spring constant is determined by the rubber balls 14, 1.
Depends on 5. That is, when a vertical force is applied to the movable frame 1, the coil spring 17 absorbs the vertical vibration. However, the rubber balls 14 and 15 only smoothly roll upward or downward due to the friction between the guide rod 11 and the cylinder wall 5, and there is no substantial absorption of vibration in the vertical direction. On the other hand, when a lateral force acts on the movable frame 1, the rubber ball 1
4 and 15 are slightly compressed. Therefore, movement of the movable frame 1 in the lateral direction is restricted. In this way, with respect to the movement of the movable frame 1, by making the horizontal spring constant larger than the vertical spring constant, the reaction of the cabinet when trying to rotate the turntable and the The associated electrical and mechanical problems can be effectively prevented.

Note that the rubber balls 14 and 15 are connected to the joint piece 16.
Although the rubber balls 14 and 15 can be used separately without being connected, in this case, it is necessary to take into account interference between the rubber balls 14 and 15, concentration in one part, and falling off. It is also conceivable to use rubber O-rings in place of the rubber balls 14 and 15, but in such a case it is necessary to consider rolling performance. Furthermore, the rubber balls 14 and 15 which are continuous in a ring shape by the previously described patch piece 16 may be obtained by gluing a straight line at both ends as shown in FIG. It has been experimentally confirmed that this has better rolling efficiency than a ring-shaped integrated ring.

As described above, the present invention provides an inner cylinder wall of a fixed frame in which an outer cylinder wall and an inner cylinder wall are set up from a bottom plate, and a viscous resistance material storage part is formed between the outer cylinder wall and the inner cylinder wall. A guide rod is inserted into the frame to support a movable frame so as to move forward and backward with respect to the fixed frame, and at least a portion of the frame is immersed in the gel-like viscous resistance material stored in the viscous resistance material storage section between the fixed frame and the movable frame. an elastic member comprising a plurality of balls connected to the inner cylinder wall and the guide rod, movable in a direction perpendicular to the advancing and retracting direction of the guide rod, and acting elastically in the horizontal direction; are disposed above and below the guide rod within the inner cylinder wall, thereby effectively suppressing horizontal movement and thereby preventing reactionary shock to the cabinet when the turntable rotates. can do.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the insulator device of the present invention, FIG. 2 is a plan view of a chain rubber ball, and FIG. 3 is a plan view showing another embodiment of the rubber ball. 1...Movable frame, 2...Fixed frame, G, 17...Elastic body, 14, 15...Ball-shaped elastic body.

Claims (1)

[Scope of utility model registration request] An outer cylinder wall and an inner cylinder wall are planted from the bottom plate, and a guide rod is inserted into the inner cylinder wall of the fixing frame, which is formed by forming a viscous resistance material storage section between the outer cylinder wall and the inner cylinder wall, and the above-mentioned fixing is performed. A movable frame is supported so as to move forward and backward with respect to the frame, and an elastic body is disposed between the fixed frame and the movable frame by immersing at least a portion of the gel-like viscous resistance material contained in the viscous resistance material storage section. , an elastic member consisting of a plurality of balls that contacts the inner cylinder wall and the guide rod, is movable in a direction perpendicular to the advancing and retracting direction of the guide rod, and acts elastically in the horizontal direction; An insulator device located above and below the guide rod.