JP3058364B2 - Electronic device foot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foot of an electronic device for supporting a device such as a computer installed on a floor.

2. Description of the Related Art In electronic devices such as computers, it is necessary to take seismic isolation measures when installing them so as not to be affected by vibrations such as earthquakes. However, the seismic isolation support structure has problems in terms of installation space, cost, and workability.

[0003] Under such circumstances, there is a demand for a footrest structure of an electronic device which is excellent in seismic isolation effect, small in size, and easy to construct.

[0004]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a foot structure of an electronic device slides on a lower surface of a leg 20 projecting from the bottom of the electronic device 10 and slides the leg 20 on a smooth surface 310. A pedestal 30 that supports as much as possible is arranged and installed on the floor surface 4. Then, in the event of an earthquake, the leg 20 of the electronic device 10 can slide with respect to the pedestal 30 that follows the vibration of the floor 4,
The electronic device 10 remains at its original position due to inertia,
It is relatively displaced and exerts the seismic isolation effect.

[0005]

However, in the conventional configuration, the vibration of the pedestal 30 is relatively small when the vibration has a relatively small amplitude.
The relative movement of the leg 20 is performed within the smooth surface 310 of the above. However, when the leg 20 is placed off the center of the pedestal 30 or receives vibration having an amplitude exceeding the diameter of the pedestal 30, The leg 20 hits the edge of the pedestal 30 and receives an impact. Furthermore, the horizontal movement of the leg 20 is prevented by the frictional force between the pedestal 30 and the floor surface 4, and a rotational moment acts on the electronic device 10, which may cause the electronic device 10 to fall.

Accordingly, the present invention provides an electronic device which supports an electronic device without being affected by vibrations caused by an earthquake or the like, and which does not fall down even in the case of an earthquake having a large amplitude .
The purpose is to provide a foot .

[0007] The above object is, become more electronic and leg which is projected to the electronic device, a pedestal for slidably supporting said leg
On the foot of the device, the lower end of the leg has a radius of curvature.
Is formed on the spherical convex surface, and
A movable receiving surface of the pedestal is larger than the radius of curvature;
A central part having a radius of curvature and
This is achieved by providing a surface which is inclined in a vertical manner, and wherein the bottom surface of the pedestal is formed as a smooth surface.

Further, the radius of curvature R1 of the spherical lower end portion 21 of the leg 2 is formed smaller than the radius of curvature R2 of the central portion 32 of the receiving surface 31 of the pedestal 3, so that the seismic isolation effect can be enhanced. .

[0009]

That is, in the present invention, even if the floor 4 is vibrated due to an earthquake or the like, the legs 2 of the electronic device 1 and the pedestal 3 mounted on the floor 4 slide, and the electronic device 1 1 is not affected by vibration and has a receiving surface 31 of the pedestal 3.
When vibration stops due to the spherical central portion 32 of
The leg 2 returns to the central portion 32 of the receiving surface 31, and the position of the leg 2 and the pedestal 3 does not shift.

[0010] Further, after an earthquake having a large amplitude, the leg 2
When is moved to the edge of the pedestal 3, a horizontal load is transmitted to the pedestal 3. However, since the bottom surface 33 of the pedestal 3 is formed as a smooth surface, the frictional force with the floor 4 is reduced. Therefore, the pedestal 3 slides on the floor 4, and the electronic device 1 and the floor 4
The electronic device 1 is prevented from tipping over without hindering relative movement of the electronic device 1.

The radius of curvature R1 of the lower end 21 of the leg 2 is
Because the radius of curvature R2 of the central portion 32 of the receiving surface 31 is smaller than the radius of curvature R2, even when the leg 2 passes through the central portion 32 of the receiving surface 31, the frictional resistance does not change and the leg 2 slides smoothly. Therefore, the seismic isolation effect is enhanced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIGS. 1 and 2 show an embodiment of the present invention. As shown in FIG. 1, a leg 2 protruding from a housing bottom 11 of an electronic device 1 and a leg placed on a floor 4 are provided. The pedestal 3 supports the body 2.

The legs 2 project from four corners of the bottom 11 of the housing of the electronic device 1 such as a computer, and have a bolt shape having a screw portion 22 that is screwed into the mounting screw hole 12 of the bottom 11 of the housing. The protrusion length of the leg 2, that is, the support height of the electronic device 1 can be adjusted by the advance and retreat of the screw portion 22.

The lower end 21 of the leg 2 is formed as a spherical convex surface having a radius of curvature R1, and the surface 23 is polished so as to be a smooth surface. The pedestal 3 is shown in FIG.
As shown in FIG. 2, the plate 2 is formed in a circular shape in a plan view, has an upper surface having a concave receiving surface 31 for supporting and supporting the leg 2, and an edge 34 is raised around the leg 2. Are prevented from falling off from the receiving surface 31.

The pedestal 3 can sufficiently support the weight of the electronic device 1 and has a high hardness such as SK so as not to cause creep deformation on the receiving surface 31 thereof.
It is formed of metal such as steel.

The central portion 32 of the receiving surface 31 is
Radius R2 larger than the radius of curvature R1 of the lower end portion 21
And is formed in a spherical concave surface.
In this case, the lower end 21 of the leg 2 is in point contact and does not fit into the spherical surface of the central portion 32. Therefore, when the leg 2 passes through the central portion 32 during sliding, the frictional resistance changes. So as not to be shocked. And
The receiving surface 31 is inclined in a horn-like manner with the center portion 32 as a center.

The base 33 of the pedestal 3 is
5 is formed integrally to form a smooth surface slidable on the floor surface 4. That is, the slide shoe 35 is made of Teflon, nylon or the like having a self-lubricating property and a small friction coefficient, is formed in a flat shape so as to stably support the electronic device 1, and has an edge portion 34.
Is formed in a round shape so as to get over a step so that sliding is not prevented by a step such as a floor panel joint portion on the floor surface 4.

Therefore, when an earthquake occurs, the frictional resistance between the legs 2 and the pedestal 3 is set to be extremely small with respect to the horizontal vibration of the floor 4, so that the electronic The device 1 stays due to inertial force, that is, moves relatively to the floor 4 and the pedestal 3. Further, when the amplitude of the vibration of the floor 4 is large and the displacement cannot be accommodated in the receiving surface 31 of the pedestal 3, the leg 2 hits the edge 34 of the pedestal 3.
At this time, the bottom surface portion 33 of the pedestal 3 slides on the floor surface 4 to be seismically isolated, and the electronic device 1 is prevented from falling.

In this embodiment, the bottom 33 of the pedestal 3 is formed as a smooth surface by the slide shoe 35. However, the bottom of the pedestal 3 alone may be polished on the smooth surface. The coefficient of friction is set so that the coefficient of friction between the floor 4 and the pedestal 3 is larger than the coefficient of friction between the leg 2 and the pedestal 3. If movement is not possible, a low friction material such as grease or molybdenum disulfide may be applied as appropriate.

As is clear from the above description, the present invention
According to the foot of electronic equipment , two-stage seismic isolation between the legs and the pedestal is used to prevent vibration and fall of the electronic equipment regardless of the amplitude of the floor vibration. In addition, the structure is simple, and the pedestal can be downsized, so that space can be saved and installation is easy.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a plan view showing a pedestal.

FIG. 3 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic device 2 Leg 21 Lower end 3 Pedestal 31 Receiving surface 32 Central part 33 Bottom part

Continuing from the front page (72) Inventor Yoshio Makino 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Osamu Nishina 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Katsuei Sato 1015 Uedanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Takashi Watanabe 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Yujiro Hata Kawasaki-shi, Kanagawa Prefecture 1015 Ueodanaka, Nakahara-ku Fujitsu Limited (72) Inventor Toshiro Kubo 1-20-10 Oi, Shinagawa-ku, Tokyo Inside Fujitsu System Construction Limited (72) Inventor Wataru Ishizu 1-20- Oi, Shinagawa-ku, Tokyo 10 Fujitsu System Construction Co., Ltd. (72) Inventor Takashi Shimura 6-26-1, Minamioi, Shinagawa-ku, Tokyo Fujitsu Customer Engineering Co., Ltd. (56) References JP-A-1-169143 (JP, ) JitsuHiraku flat 2-19260 (JP, U) JitsuHiraku flat 1-128097 (JP, U)

Claims (1)

(57) [Claims] An electronic device comprising: a leg protruding from an electronic device; and a pedestal for slidably supporting the leg, wherein a lower end of the leg has a lower end. The pedestal is formed on a spherical convex surface having a radius of curvature and is slidable with the convex portion.
The center has a radius of curvature greater than the radius of curvature
Part and the surface inclined in the shape of a slash around the central part
Provided, and pedestals of the electronic device bottom portion of the pedestal is characterized by comprising formed on a smooth surface.