JPS636518Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a protective leg suitable for use as an insulator for vibration isolation in appliances such as electrical products, such as record players that do not like external vibration shock. In particular, this invention relates to a protective leg which has a simple structure and is easy to manufacture, and which also simplifies attachment to instruments and allows for efficient attachment work.

In general, a wide variety of protective legs for instruments have been proposed and put into practical use, but protective legs such as insulators, which are mainly used to isolate external vibrations, are made of elastic materials such as rubber or soft synthetic resin. It is generally made of soft, flexible material.

Although the legs made of this flexible material have elasticity, it is difficult to use elasticity to attach them to the device on their own, unlike protective legs made of thermoplastic synthetic resin, for example. Generally, they have a special shape or are combined with a rigid metal material.

The ones shown in Figures 1 and 2 are conventional examples of insulators molded from a flexible material, and the one shown in Figure 1 mainly has legs made of a soft material such as rubber into a roughly cylindrical shape. A washer 3 rotatably holding a screw 2 is inserted into the upper part of the leg 1, and the screw 2 protrudes above the main body of the leg, while the bottom plate 4 of the instrument is
A through hole 5 is formed through which this screw is inserted, a nut 6 is buried in this through hole, and the screw 2 inserted through the through hole from the underside of the bottom plate is fixed by screwing into the nut 6. This is an example of
In the figure, an insertion part 9 having an arrowhead-shaped cross section is integrally molded with the same flexible material as the main body on the upper surface part 8 that closes the upper part of the leg main body 7, which is also formed in a substantially cylindrical shape, and this insertion part is attached to the bottom plate. This is an example in which the tool 12 is used to force the insertion into the through hole 11 drilled in the hole 10, and the jaw portion of the engaging portion is locked and fixed.

As seen in these examples, the former is a combination of screws and nuts, while the latter is integrally molded from a flexible material, but requires tools to fasten. Moreover, in order to insert the engaging portion, the device must be pulled in from the inside of the device, and there is a problem that it may not be possible to secure the device depending on the attachment location.

The present invention was devised in view of the complexity of manufacturing conventional legs, the complexity of work, and the restrictions imposed by the mounting location.The features of the present invention are described below. An example will be explained.

The embodiment shown in FIGS. 3 to 5 is an example in which the present invention is embodied as an insulator. Reference numeral 20 indicates a leg main body, 21 indicates an insert body, 22 indicates an extension body, and 23 indicates a bottom plate of a record player. , and 24 indicates a hole made in this bottom plate.

The leg main body 20 shown in this embodiment has cylindrical portions 20a and 20b having different diameters arranged vertically to form a cylindrical shape with an enlarged diameter at the lower end, and a flange-like contact is formed from the outer peripheral surface of the lower end. The floor piece 20c is further configured with a cylindrical portion 20d extending upwardly from the outer peripheral edge of the floor piece, and the insert body 21 is a connecting portion that extends annularly from the inner peripheral surface of the upper end portion of the leg main body 20. They are provided so as to be integrated with each other via 25.

The insert body 21 is formed into a cylindrical shape and is provided so that the entire body protrudes from the upper end of the leg main body 20, and the extension body 22 is provided so as to be continuous below this insert body.

The insert body 21 and the expansion body 22 shown here are integrated as one cylindrical body, and the upper part of the connection part 25 is the insertion body 21 and the lower part is the expansion body 22. The insert 21 is made higher than the thickness of the bottom plate 23 of the record player, and its outer diameter is approximately equal to the diameter of the hole 24 formed in the bottom plate. The upper end is made to protrude from the upper surface of the bottom plate 23. And the extension body 22
has approximately the same length as the insert body 21, so that the entire body is housed inside the leg main body 20 in a hanging manner.

The expansion body 22 is pushed into the inside of the insert body 21 to expand its diameter as will be described later, and its lower end opening is closed with a bottom part 26 having a bulged lower surface, and is formed into a cylindrical shape with a bottom. .

The protective leg according to the present invention, that is, the insulator shown in the above embodiment, is constructed as described above, and the entire leg including the leg main body 20, insert body 21, and extension body 22 is made of rubber, soft synthetic resin, etc. It is integrally molded from a soft material with a certain amount of elasticity. This protective leg is inserted into the bottom plate of the record player by first inserting the insert 21 into the hole 24 from below, and when the upper end of the leg main body 20 comes into contact with the lower surface of the bottom plate 23, the insert body 21 is inserted into the bottom plate of the record player. The attachment is carried out by pushing up the bottom part 26 of the extension body 22 suspended from the insert body 21 with a rod-shaped tool, and pushing the extension body inside out into the insert body 21 while turning the extension body upside down.

FIG. 5 shows the protective leg of the present invention fixed to the bottom plate of a record player in this manner, and the insert body 21 inserted into the hole 24 by the expansion body 22 expands in diameter. This means that slipping out of the hole is prevented and a fixed state is ensured.

In this embodiment, the hole 24 is made into a tapered hole whose diameter increases toward the upper surface in accordance with the expanded diameter of the insert body 21 due to the insertion of the expansion body 22, thereby improving the biting into the hole. , insert body 21
A plurality of small protrusions 27 are provided along the circumferential direction on the inner peripheral surface of the
is arranged, thereby making it possible to reduce the substantial inner diameter of the insert and increase the rate of expansion due to the interruption of the expander 22.

As explained above, the protective leg of the present invention can be fastened by simply inserting the insert body 21 into the hole and pushing the expansion body 23 into the insert body, so it is extremely easy to work with and can be fastened easily. Since this can be done by pushing the extension body from below the leg main body, it has the advantage that it can be fixed without being affected by equipment such as a record player that is housed inside.

In addition, the entire protective leg of this invention can be integrally molded from a single material such as rubber or synthetic resin.
It has the advantage that it is easy to manufacture and can be provided at a low price.

In the above embodiment, the shape of the hole is a tapered hole, but the shape of the hole is not limited to this, and even if it is a simple through hole or a blind hole in some cases, the protective leg can be used. It is possible to fasten.

Furthermore, although the lengths of the extension body 22 are made the same as those of the insert body 21, there is no problem even if the lengths are unequal.

In short, the present invention is characterized in that by pushing the expandable body into the insert while turning it upside down, the expandable body functions as a wedge and a relationship is obtained in which the insert can be expanded. Providing the small protrusions 27 on the inner circumferential surface of the body is effective in increasing this expansion rate, and making the lower surface of the bottom part 26 of the expandable body 22 bulge and thicken improves the expansion state of the insert body. Although it is effective in maintaining this, it is not limited to this.

Of course, in the explanation of the embodiment, the insulator was explained as an example, but as is clear from the above structure, it can also be used as a protective leg for other instruments, and it is explained here that the same effect can be achieved. There's probably no need to do that.

[Brief explanation of the drawing]

Figures 1 and 2 are longitudinal sectional views showing a conventional example, and Figure 3 is a plan view of an insulator in which the present invention is implemented.
FIG. 4 is a central vertical cross-sectional view before being fastened, and FIG. 5 is an enlarged vertical cross-sectional view of the main parts in the fastened state. 20 is the leg main body, 21 is the insert body, 22 is the extension body, 25 is the connection part, and 26 is the bottom part.

Claims (1)

[Scope of utility model registration request] A cylindrical insert body is connected to the upper end of the cylindrical leg main body through a connecting part so as to project upward from the leg main body, and the insert body is inserted into a hole formed in the bottom plate of the instrument, An expanding body with a bottom, which has a substantially identical cylindrical shape, is arranged below the insert, and the expanding body is pushed into the insert in a folded manner, and the insert is expanded within the hole, so that the lower surface of the bottom plate is expanded. A protective leg for an instrument that is integrally molded from a flexible material such as rubber and is designed to be fixed.