U.S. patent application number 09/820355 was filed with the patent office on 2002-03-28 for amplifier.
Invention is credited to Sakamoto, Yuzuru, Shiratori, Masuo, Takayasu, Tetsufumi.
Application Number | 20020036892 09/820355 |
Document ID | / |
Family ID | 18775242 |
Filed Date | 2002-03-28 |
United States Patent
Application |
20020036892 |
Kind Code |
A1 |
Sakamoto, Yuzuru ; et
al. |
March 28, 2002 |
AMPLIFIER
Abstract
The object of the present invention is to repair or to replace
an amplifier for a portable telephone or the like without loss of
an amplifying function even when the amplifier malfunctions. A
plurality of door-shaped amplifier parts (10) are provided on the
left and right sides of an amplifier box. The left and right
door-shaped amplifier parts (10) can be mounted on opposite sides
each other. One amplifier part (10) is in service and the other
amplifier part (10) is a backup. In the case where the amplifier
part (10) in service malfunctions, the other amplifier part (10) is
used as it is or is mounted for use on the opposite side.
Inventors: |
Sakamoto, Yuzuru; (Tokyo,
JP) ; Takayasu, Tetsufumi; (Tokyo, JP) ;
Shiratori, Masuo; (Tokyo, JP) |
Correspondence
Address: |
WENDEROTH, LIND & PONACK, L.L.P.
2033 K STREET N. W.
SUITE 800
WASHINGTON
DC
20006-1021
US
|
Family ID: |
18775242 |
Appl. No.: |
09/820355 |
Filed: |
March 29, 2001 |
Current U.S.
Class: |
361/704 |
Current CPC
Class: |
H04M 3/12 20130101; H04B
1/74 20130101; H04Q 1/114 20130101; H04Q 2201/10 20130101; H04Q
1/035 20130101; H04Q 2201/08 20130101 |
Class at
Publication: |
361/704 |
International
Class: |
H05K 007/20 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 26, 2000 |
JP |
2000-292283 |
Claims
What is claimed is:
1. An amplifier comprising a box and a plurality of amplifier parts
mounted on the box in such a way that they are opened or
closed.
2. An amplifier according to claim 1, wherein the mating portion of
the box and each of the amplifier parts has a waterproof
structure.
3. An amplifier comprising a box, a plurality of amplifier parts
mounted on the box in such a way that they are opened or closed,
and radiators mounted on the respective amplifier parts in such a
way that they are exposed outside.
4. An amplifier according to claim 3, wherein the mating portion of
the box and each of the amplifier parts has a waterproof
structure.
5. An amplifier comprising a box and an amplifier part mounted on
the box in such a way that it can be opened or closed with a hinge
to be separated, wherein the amplifier part can be dismounted from
the box by separating the hinge.
6. An amplifier according to claim 5, wherein the hinge is
separated into a box side member fixed to the box and an amplifier
side member fixed to the amplifier part and wherein the box side
member is fitted in the amplifier part side member from below to
prevent the amplifier part from dropping.
7. An amplifier according to claim 5, wherein the amplifier part is
a pair of amplifier parts mounted on the left and right sides of
the box such that they can be opened or closed with hinges, wherein
each hinge is separated into a box side member fixed to the box and
an amplifier side member fixed to the amplifier part, wherein a
backup amplifier side member is fixed to a position opposite to the
position where the amplifier part side member of the amplifier part
is fixed, and wherein the amplifier part is selectively mounted on
the left side or the right side of the box by selectively fitting
the amplifier part side member in service or the backup amplifier
part side member in the amplifier part side member.
8. An amplifier comprising a box and an amplifier part mounted on
the box in such a way that it can be opened or closed with a hinge
having a clearance, wherein a packing made of an elastic material
is fixed to the mating portion of the box and the amplifier part
and wherein the amplifier part is fixed to the box in the state
where the amplifier part is closed with a fastening member for
pressing the amplifier part onto the box.
9. An amplifier comprising a box, a pair of amplifier parts mounted
on the left and right sides of the box in such a way that they are
opened or closed, wherein the left and right amplifier parts can be
mounted on the opposite sides, wherein a rubber packing is provided
at the mating face of the box and each of the amplifier parts, and
wherein a radiator for dissipating heat is provided on the outside
of each of the amplifier parts.
10. An amplifier according to claim 9, wherein one of the pair of
amplifier parts is used and the other is a backup.
11. An amplifier according to claim 10, wherein the amplifier is
placed outdoors at a high position in order to amplify the radio
wave of a portable telephone system.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to an amplifier and the one
applied to, for example, an outdoor type amplifier placed on the
top of a telephone pole and used for a radio communication system
for a portable telephone.
[0003] 2. Description of the Related Art
[0004] An outdoor type amplifier, which is placed at a high
position such as on the top of a telephone pole or on the roof of a
building, is used for amplifying a radio wave in a portable
radio-phone system such as a portable telephone. One example of
conventional outdoor type amplifiers placed on the top of a
telephone pole is shown in FIG. 4.
[0005] This amplifier is composed of an amplifier box 101 and one
amplifier part 102 built therein. A door 103 for maintenance and
inspection is provided on the front of the amplifier box 101. A
rubber packing 104 is provided on the mating face of the door 103
where the door 103 is mated with the amplifier box 101, and the
door 103 is closed in the state where the door 103 is mated with
the packing 104 by fastening screws 105.
[0006] On the back side of the amplifier box 101 is provided a
radiator 106 for dissipating heat. On the back of the amplifier box
101 is provided a fixing hardware 107 and by fixing the fixing
hardware 107 to a telephone pole or the like with fixing bolts 108,
the amplifier is fixed to the telephone pole or the like. A
high-frequency connector 109, a signal connector 110, a power
source connector 111 and the like are connected to the amplifier
part 102 in the amplifier box 101 from the outside.
[0007] When the amplifier having the above configuration needs to
be dismounted and repaired or replaced, the high-frequency
connector 109, the signal connector 110, the power source connector
111 are disconnected and further the fixing bolts 108 are removed
and then the whole amplifier is dismounted from the telephone
pole.
[0008] In the above conventional amplifier, when the amplifier is
repaired or replaced, because the amplifier part is one, the
amplification function of the amplifier is lost to narrow the
service area of the portable telephone, which results in causing
inconvenience to the users of the portable telephone.
SUMMARY OF THE INVENTION
[0009] The present invention has been made in view of this problem
and the object of the present invention is to provide an amplifier
which does not lose an amplification function even when it is
repaired or inspected.
[0010] An amplifier according to the present invention to solve the
above-mentioned problem comprises a box and a plurality of
amplifier parts mounted on the box in such a way that they are
opened or closed.
[0011] According to the amplifier of the present invention, even in
the case where one amplifier part malfunctions, while it is
repaired or replaced, the other amplifier part can substitute for
the malfunctioning amplifier part.
[0012] An amplifier according to the present invention is
characterized in that each amplifier part has a radiator in the
above-mentioned constitution.
[0013] According to the amplifier of the present invention, heat
generated by the amplifier part can be dissipated by the
radiator.
[0014] An amplifier according to the present invention is
characterized in that the mating portion of the box and each of the
amplifier parts has a waterproof structure in the above-mentioned
constitution.
[0015] According to the amplifier of the present invention, the
mating portion of the box and each of the amplifier parts has a
waterproof structure and hence can prevent rain or the like from
entering the box to protect the amplifier part.
[0016] An amplifier according to the present invention comprises a
box and an amplifier part mounted on the box in such a way that it
can be opened or closed with a hinge to be separated and that it
can be dismounted from the box by separating the hinge.
[0017] According to the present invention, when the amplifier part
malfunctions because of a failure, it is dismounted from the box
and can be readily replaced or repaired.
[0018] An amplifier according to the present invention is
characterized in that, in the above-mentioned constitution, the
hinge is separated into a box side member fixed to the box and an
amplifier side member fixed to the amplifier part and that the box
side member is fitted in the amplifier side member from below to
prevent the amplifier part from dropping.
[0019] According to the present invention, in the case where the
amplifier is placed at a high position, when the amplifier part is
repaired without being dismounted from the box, even if the
amplifier part is opened, the amplifier part is prevented from
dropping and further can be opened at the front of a worker, which
facilitates a repair work.
[0020] An amplifier according to the present invention is
characterized in that, in the above-mentioned constitution, the
amplifier part is a pair of amplifier parts mounted on the left and
right sides of the box such that they can be opened or closed with
hinges, wherein each hinge is separated into a box side member
fixed to the box and an amplifier side member fixed to the
amplifier part, wherein a backup amplifier side member is fixed to
a position opposite to the position where the amplifier side member
of the amplifier part is fixed, and wherein the amplifier part is
selectively mounted on the left side or the right side of the box
by selectively fitting the amplifier part side member in service or
the backup amplifier part side member in the amplifier part
side-member.
[0021] According to the present invention, an amplifier part
dedicated to a right-hand side or a left-hand side is not required
but the same amplifier part can be mounted on the either side of
the box, which results in a reduction in manufacturing cost. Also,
when assembling the amplifier part, it is possible to assemble the
amplifier part without taking into account the position where the
amplifier part is to be mounted, such as right-hand side or a
left-hand side, which results in a reduction in work load.
[0022] An amplifier according to the present invention comprises a
box and an amplifier part mounted on the box in such a way that it
can be opened or closed with a hinge having a clearance, wherein a
packing made of an elastic material is fixed to the mating portion
of the box and the amplifier part and wherein the amplifier part is
fixed to the box in the state where the amplifier part is closed
with a fastening member for pressing the amplifier part onto the
box.
[0023] According to the present invention, a packing made of an
elastic material for sealing such as rubber, synthetic resin or the
like is fixed to the mating portion of the box and the amplifier
part to form a waterproof structure for preventing the entry of
rain or the like, and if the amplifier part is pressed onto and
fixed to the box by the use of a fastening member such as a screw,
a clip or the like in the state where the amplifier part is closed,
the amplifier part and the box are pressed onto the packing of the
mating portion to surely make the mating portion waterproof.
[0024] An amplifier according to the present invention comprises a
box, a pair of amplifier parts mounted on the left and right sides
of the box in such a way that they are opened or closed, wherein
the left and right amplifier parts can be mounted on the opposite
sides, wherein a rubber packing is provided at the mating face of
the box and each of the amplifier parts, and wherein a radiator for
dissipating heat is provided on the outside of each of the
amplifier parts.
[0025] According to the amplifier of the present invention, even if
one of the left and right amplifier parts malfunctions, while it is
repaired or replaced, the other amplifier part can substitute for
the malfunctioning amplifier part. Also, according to the amplifier
of the present invention, heat generated by the amplifier part is
dissipated by the radiator provided on the outside. According to
the amplifier of the present invention, the packing provided on the
mating portion of the box and the amplifier part can prevent the
entry of rain or the like. Further, according to the amplifier
parts of the present invention, they can be switched between the
left and right amplifier parts. Therefore, when the amplifier part
in service malfunctions, it can be replaced with the other
amplifier part.
[0026] An amplifier according to the present invention is
characterized in that, in the above-mentioned constitution, one of
the pair of amplifier parts is in service and the other is used as
a backup.
[0027] Also, an amplifier according to the present invention is
characterized in that, in the above-mentioned constitution, the
amplifier is placed outdoors at a high position in order to amplify
the radio wave of a portable telephone system.
[0028] According to the amplifier of the present invention, when
the amplifier part now in service malfunctions because of a
failure, it can be replaced with the backup amplifier part on
standby. Therefore, the operation of a radio communication system
using this amplifier can be restored without being stopped for a
long time.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] FIG. 1 is a perspective external view of an amplifier
according to one preferred embodiment of the present invention;
[0030] FIG. 2 is an exploded perspective view of one preferred
embodiment;
[0031] FIG. 3 is a view to show the assembling procedures of one
preferred embodiment; and
[0032] FIG. 4 is a perspective view of one example of conventional
amplifiers.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0033] FIG. 1 shows a perspective external view of an amplifier
according to one preferred embodiment of the present invention, and
FIG. 2 shows an exploded perspective external view of one preferred
embodiment and FIG. 3 shows a view to show the assembling
procedures of one preferred embodiment.
[0034] A box 1 is shaped like a rectangular solid and has a
partition wall 2 at the center in the left-right direction (in the
direction of width) and spaces 3 in both sides of the partition
wall 2. A rubber packing 4 is fixed to the rectangular opening end
surface of each of both the left and right sides of the box 1.
Fixing female screw threads (here, four screw threads) 5 are cut in
the opening end surface through the rubber packing 4. Receiving
blocks 6, each of which constitutes one part member of a hinge, are
fixed to the upper and lower portions of both the left and right
borders on the back side of the box 1. In the receiving block 6 is
made a hole 7 into which a shaft of a shaft block constituting the
other member of the hinge as described below.
[0035] On the back of the box 1 is fixed a fixing hardware 8
approximately shaped like a letter T. A plate-shaped portion 8a
projecting to the left and right sides of the fixing hardware 8 is
fixed to a telephone pole or the like with bolts 9.
[0036] Each of the respective left and right door-shaped amplifier
parts 10 in which an amplifier is built is shaped like a plate. A
large number of fins 11 constituting a radiator as a device for
dissipating heat are fixed, in parallel in the up and down
direction, to the outer surface of the door-shaped amplifier part
10. Shaft blocks 13, each of which constitutes the other part
member of the hinge, are fixed to the upper and lower portions of
both the side end faces 12 of the respective left and right
door-shaped amplifier parts 10. Each shaft block 13 is provided in
a downward direction with a pin 14 to be inserted into the hole 7
of the receiving block 6. The pin 14 of the shaft block 13 is
fitted in the hole 7 of the receiving block 5 with a little
clearance therebetween. Fixing male screws 15 to be screwed into
the fixing female screw threads 5 cut in the box 1 are provided at
the positions corresponding to the fixing female screw threads 5 on
both sides of the large number of fins 11 fixed to the door-shaped
amplifier part 10.
[0037] Next, the assembling procedures of the amplifier in
accordance wit one preferred embodiment based on FIG. 3.
[0038] The pin 14 of each of the upper and lower shaft blocks 13 on
the side end of one of the door-shaped amplifier parts 10 is
inserted into the hole 7 of each of the upper and lower receiving
blocks 6 on each of both the left and right sides of the back of
the box 1, as shown by an arrow A in FIG. 3. The door-shaped
amplifier part 10 is supported by the receiving blocks 6 in the
state where the bottom surface of each of the shaft blocks 13 is
placed on the top surface of each of the receiving blocks 5, and
the hole 7 and the pin 14 inserted thereinto function as a hinge,
whereby the door-shaped amplifier part 10 is supported by the
receiving blocks 6 from the lower side thereof and is prevented
from dropping downward and can be opened or closed with respect to
the rubber packing 4 on the opening end face of the box 1.
[0039] When the door-shaped amplifier part 10 is closed and the
fixing male screws 15 are screwed into the fixing female threads 5,
the door-shaped amplifier part 10 is fixed to the box 1 in the
state where the door-shaped amplifier part 10 is closed, whereby
the opening portion of the box 1 is closed and at the same time the
rubber packing 4 is compressed, that is, the opening portion of the
box 1 is hermetically closed. Since there is a little clearance
between the hole 7 of the receiving block 6 and the pin 14 of the
shaft block 13, the rubber packing 4 is uniformly compressed by
fastening the fixing male screws 15 to surely make the box 1
waterproof around its periphery.
[0040] The amplifier assembled in the above mentioned manner is
fixed to a telephone pole or the like. That is, the plate-shaped
portion 8a of the fixing hardware 8 amplifier is fixed to the
telephone pole side by fastening bolts 9. Also, though not shown, a
high-frequency connector, a signal connector, and a power source
connector are connected to the box 1 from the bottom side. Here, in
the case where one of the left and right door-shaped amplifier
parts 10 is used and the other is a backup, the high-frequency
connector, the signal connector, and the power source connector are
arranged such that they are connected to the one of the door-shaped
amplifier parts 10. In the case where both the door-shaped
amplifier parts 10 are used, the high-frequency connector, the
signal connector, and the power source connector are arranged such
that they are connected to both of the door-shaped amplifier parts
10.
[0041] When the door-shaped amplifier part 10 is repaired or
inspected, the fixing male screws 15 of the objective door-shaped
amplifier part 10 are removed and the door-shaped amplifier part 10
is opened. The door-shaped amplifier part 10 is supported by the
receiving blocks 6 in the state where the bottom surface of each of
the shaft blocks 13 is placed on the top surface of each of the
receiving blocks 6. Since an inspection and a repair is made to the
door-shaped amplifier part 10 in the open state, the work of
inspection and repair can be made from the front side of the
door-shaped amplifier part 10. In the case where the door-shaped
amplifier part 10 is dismounted, in a reverse order to the case
where it is mounted, the door-shaped amplifier part 10 is
dismounted by moving upward the door-shaped amplifier part 10 and
removing the pin 14 of the shaft block 13 from the hole 7 of the
receiving block 6.
[0042] In the case where only one of the door-shaped amplifier
parts 10 is used and the other is a backup, the malfunctioning
door-shaped amplifier part 10 is dismounted, for example, in the
case where the right-hand door-shaped amplifier part 10
malfunctions, the right-hand door-shaped amplifier part 10 is
dismounted and the left-hand door-shaped amplifier part 10, which
is the backup, is mounted on the right-hand side. Since the
door-shaped amplifier part 10 is provided with the shaft blocks 13
on both sides, it can be mounted on right-hand side of the box 1 by
the use of the shaft blocks 13 opposite to the shaft blocks 13 used
when the door-shaped amplifier part 10 is mounted to the left side
of the box 1. Therefore, the malfunctioning door-shaped amplifier
part 10 can be repaired or replaced with a function as an amplifier
continued. Needless to say, a new door-shaped amplifier part 10 for
a replacement is mounted on the left-hand side of the box 1 which
is made vacant.
[0043] Although the door-shaped amplifier parts 10 are mounted on
both the left and right sides of the box 1 in the above-mentioned
preferred embodiment, another door-shaped amplifier part 10 may be
mounted on the front side, that is, three door-shaped amplifier
parts 10 may be mounted in total. Further, if the box 1 is fixed to
the telephone pole or the like at the center portion, four or more
door-shaped amplifier parts 10 can be provided around the box
1.
[0044] Although the radiator is composed of a large number of fins
arranged in parallel in the up and down direction, the
configuration of the radiator is not limited to this type but other
radiators of various shapes can be adopted.
[0045] Also, as for the receiving block 6 and the shaft block 13
constituting the hinge, the box 1 may be provided with a receiving
block having a pin projecting upward and the door-shaped amplifier
part 10 may be provided with a block in which a hole is made from
the bottom surface. Further, as for a hinge structure, any hinge
structure may be adopted in which the door-shaped amplifier part 10
can be opened or closed with respect to the box 1 and be removably
mounted on the box 1.
[0046] Further, the present invention is not limited to the
amplifier for the portable telephone but can be applied to various
kinds of amplifiers.
Effects of the Invention
[0047] According to an amplifier of the present invention, a box is
provided with a plurality of amplifier parts which are opened or
closed. Hence, even if one amplifier part malfunctions, the other
amplifier part can continue the function of the amplifier if it is
operated. Therefore, for example, in the case where the present
invention is applied to the amplifier of the portable telephone,
even the malfunction of one amplifier part does not result in the
occurrence of an event where a service area is narrowed.
[0048] According to an amplifier of the present invention, one
amplifier is provided with a plurality of amplifier parts and hence
it is not necessary to separately keep many amplifier parts for
maintenance and replacement.
[0049] According to an amplifier of the present invention, an
amplifier part itself is provided with a radiator to dissipate heat
and hence it is possible to avoid the malfunction caused by the
heat generation of the amplifier. Further, since a box has a
waterproof structure, it is possible to prevent rain or the like
from entering the box and hence to protect the amplifier part.
[0050] According to an amplifier of the present invention, a box is
provided with amplifier parts on both the left and right sides in
such a way that they are opened or closed. Hence, a maintenance
work can be made directly to the amplifier part from the front side
in the state where the amplifier part is opened, which facilitates
the maintenance and inspection work of the amplifier part even if
the amplifier is placed in a narrow working space such as on a
telephone pole or the like. Further, according to amplifier parts
of the present invention, it is possible to switch between left and
right amplifier parts. Therefore, even if one amplifier part in
service malfunctions, it is possible to continue the function of
the amplifier by replacing it with the other amplifier part.
* * * * *