JPH0680935U - Damper - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a damper that has excellent vibration damping performance and vibration damping performance, and that does not cause a change in the set position of the supported body due to a shape change even when subjected to load fatigue for a long period of time. . A damper comprising a plurality of members each having a height holding portion and a vibration-damped portion, each having different hardness, wherein the vibration-damped portion is made of a member having a lower hardness. Damper characterized by. The hardness of the member with high hardness is 6
It is preferable that the hardness is 0 to 100 (JIS A), the hardness of the low hardness member is 0 to 60 (JIS A), and the difference in altitude between the two is at least 10 or more, and particularly 30 or more.

Description

[Detailed description of the device] [Prior art and its problems]

[0001]

[Industrial applications]

 The present invention relates to a damper, and more specifically, even when various types of audio equipment or precision measuring equipment are placed at a high position, the function of maintaining the height for a long time, suppressing vibration, and preventing The present invention relates to a damper having both vibration and shock absorbing functions.

[0002]

[Prior art and its problems]

 In various audio equipment such as CD disc players and video tape recorders, or in various precision measuring equipment, when vibration is transmitted from the outside and input, it adversely affects the performance of those equipment. Dampers are placed everywhere to prevent the transmission of vibrations from the. In particular, the disk player, MD, floppy, MO, and CD, which are examples of audio equipment, are required to use damping at the laser emission part or the CD loading part to maintain a predetermined height. Is used to prevent troubles such as disc rubbing and disc loading failure.

As the former example of the dampers, a so-called viscous liquid-sealed damper in which a viscous liquid such as silicone oil is sealed in a rubber container is known. This viscous liquid-filled damper is relatively widely used because it has a relatively simple structure and a proper vibration damping capacity. However, in order to manufacture this damper, the difficult process of filling the viscous liquid is indispensable, and once the viscous liquid-filled damper is manufactured, the liquid from the fixed part or the thin wall part of the damper will change over time. Could be easily leaked and the vibration absorption capacity might be reduced.

On the other hand, as the latter example of the damper, a damper using a shock absorbing material or a low repulsion material is known. Since these dampers do not use viscous liquids, the problems of the manufacturing method and the leakage of the enclosed liquid were avoided, but the compression set was high and the high temperature If it is compressed with a load applied, it is likely to be permanently deformed, which tends to cause a change in the dynamic spring constant due to a change in shape, and it is also impossible to maintain the set height.

In order to improve those drawbacks, a member having a high hardness and a high compression permanent strain is selected as a member of the damper, and when the damper is manufactured from the member, the damper is certainly subjected to a load. Permanent deformation is less likely to occur even if left as it is for a long time, but this time, a new problem was discovered that it becomes difficult to suppress a specific frequency when vibration or shock is applied.

[0006]

[The purpose of the device]

 Therefore, an object of the present invention is to provide a damper that can effectively absorb vibrations and shocks and that is unlikely to undergo permanent deformation even if left for a long time while being loaded.

[0007]

[Means for achieving the purpose]

 The present invention has been proposed in order to achieve the above-mentioned object, and is characterized in that it has a vibration damping function and a vibration damping section and a height holding mechanism in order to maintain the vibration damping function at a specific height. It is to combine the holding parts, make a specific height with a material with high hardness, maintain it, and make the parts that control other vibration damping functions softer than that. That is, according to the present invention, there is provided a damper having a height holding portion and a vibration-damped portion, each of which has different hardness. There is provided a damper characterized by being constituted by the above member.

[0008]

[Specific explanation of the device]

 Hereinafter, the present invention will be described in detail with reference to FIGS. 1, 2 and 3 which are perspective views of an example of a suitable damper of the present invention. The damper of the present invention has a structure in which a member (1) having a high hardness which constitutes a height holding portion is arranged on a member (2) having a low hardness which constitutes a vibration-damped portion. The arrangement relationship between the member (1) and the member (2) in the present invention means that the member (2) is arranged on the member (1) when the vibration-damped portion is located above. It will be understood that the arrangement relationship between the member (1) and the member (2) is, of course, the opposite when the vibration-damped portion is located below. The ratio between the height (X) of the member (1) and the height (Y) of the member (2) is not particularly limited, and can be set arbitrarily according to the type of equipment used and the like. Further, the size of the top surface or the bottom surface of each member changes depending on the size, weight, and applied vibration of the supported body and is not particularly limited.

The shape of the member having high hardness is a columnar shape (FIG. 1), a prismatic shape (FIG. 2), or a part having a hollowed inside (FIG. 3), which can achieve the above object. It is not limited to the maximum. The shape of the member having low hardness preferably corresponds to the shape of the member made of the hard member, but is not limited thereto.

The contact surfaces of the two members constituting the damper of the present invention may be formed in a flat shape, a curved shape, or an uneven shape that is fitted to each other.

The member having high hardness is preferably prepared from a known elastomer or resin. Specific examples thereof include a cured product of an elastomer such as NR, BR, IIR, SBR, urethane rubber, and silicone rubber, a cured product of a resin having a crosslinkable functional group, or a thermosetting resin. The hardness of the member is preferably 60 to 100 (JIS A), particularly preferably 80 to 98 (JIS A).

As the member having low hardness, it is preferable to use a member obtained from a known elastomer or resin. Specifically, foams such as NR, BR, IIR, SBR, urethane rubber, and silicone rubber, or cured products that are cured more slowly than the hard members, polyolefin foams, TPE plastics, etc. Are listed. The hardness of the member is preferably 0 to 60 (JIS A), particularly preferably 0 to 60 (JISA). The lower limit of the member with high hardness and the upper limit of the member with low hardness are both 60 (JIS A), but in the present invention, both members do not have the same hardness, and the difference between them is at least 10 or more. It is particularly preferably 30 or more.

The damper is, for example, a method of manufacturing the two members in advance and then joining the two members with an adhesive, and processing the contact surfaces of the two members so that they are fitted to each other, and then fixing them. It is possible to perform the molding by a two-step method, or by a method of molding both members in one step using a mold.

The damper of the present invention has the above-mentioned structure and can be used in the same manner as the dampers used conventionally. An example of using the damper of the present invention will be specifically described with reference to FIG. A support (61) for a CD player, which is mainly composed of a CD disc plate (62), an optical system (not shown), and a motor (63), is held on the upper part of the damper. The lower part of the damper is fixed by a fixing member (7). Even if the fixing member shakes due to vibration, the vibration is absorbed by the damper fixed by the fixing member, and the height of the CD disk plate can be maintained within a certain range.

[0015]

[Effect of device]

 According to the present invention, a member having a low hardness absorbs shock and vibration, and a member having a high hardness prevents deformation due to a load. Especially, various audio equipments and precision measuring equipments are arranged at a high position. In this case, a damper having both effective vibration damping function and height holding function is provided.

[Brief description of drawings]

FIG. 1 is a perspective view (FIG. A) of an example of a damper of the present invention. (FIG. B) is a view on arrow of FIG.

FIG. 2 is a perspective view of another example of the damper of the present invention.

FIG. 3 is a perspective view of still another example of the damper of the present invention.

FIG. 4 is a sectional view of an essential part of an example of supporting a CD player using the viscous damper of the present invention.

[Explanation of symbols]

 1 member having high hardness 2 member having low hardness 7 fixing member 51 supported tool 52 CD disc plate 53 motor

Claims (2)

[Scope of utility model registration request] 1. A damper having a height-holding portion and a vibration-damped portion, each of which has a different hardness, wherein the height-holding portion is made of a member having a higher hardness. A damper characterized in that the vibration-damped portion is made of a member having a lower hardness. 2. The hardness of the height holding portion is 60 to 100.
(JIS A), the hardness of the vibration-damped part is 0 to 60 (JIS
The damper according to claim 1, which is A).