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JPH03276910

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DESCRIPTION JPH03276910
[0001]
[Industrial field of application 1] The present invention relates to an embedded volume controller
for a speaker used in a local broadcast apparatus or the like. 2. Description of the Related Art In a
local broadcasting apparatus or the like, there is one in which a volume adjuster is embedded in a
wall surface so that the volume of a speaker can be adjusted for each place. In this case, in order
to bury this sound tll equipment on a wall surface or the like, there may be a case in which a
standardized embedded equipment for wiring equipment is used as it is. In other words, the
external dimensions of the case of the volume adjuster are matched with the module dimensions
of the standardized ready-made wiring tool, and the wiring tool is removably attached to the
mounting frame attached to the embedded box embedded in the wall. Possible mountings are
formed and embedded in the wall in the same way as a wiring device. [Problem to be Solved by
the Invention] By the way, in the embedded volume controller of this type, the input / output
terminals of the connection structure are made as easy as possible to connect the input / output
lines drawn into the embedded box. There is a structure in which the input / output terminal is
housed together with the cover in the housing of the body constituting the case, and the opening
of the housing is closed by the terminal cover. However, in the conventional volume adjuster of
this type, since the terminal cover is screwed, there is a problem that the workability in attaching
the terminal cover is poor. Further, in the conventional volume adjuster, it is necessary to
connect a lead wire from a volume block to the terminal board of the input / output terminal, but
the connection workability is also bad. Furthermore, in the volume controller provided with the
above-mentioned terminal cover, there also existed a problem that the lead wire which connects
a volume control block and an input-and-output terminal will be pinched between a terminal
cover and a cover. The present invention has been made in view of the above-described points,
and a first object of the present invention is to improve the workability of attaching a terminal
cover, and a second object is to provide a lead A third object of the present invention is to
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improve connection workability of the wire and to prevent the lead from being pinched between
the terminal cover and the cover. [Means for Solving the Problems 1 In order to achieve the
above first object, the present invention is to close the opening of the terminal accommodating
portion for accommodating the input / output terminal by the terminal cover elastically fitted to
the body. In addition, in order to achieve the second object, it projects through the insertion hole
of the terminal cover to the terminal board of the input / output terminal, and the volume lI! A
connection terminal is formed to temporarily fix and solder the lead of the adjustment block.
Furthermore, in order to achieve the third object, the terminal cover is provided with a
positioning projection for positioning the lead wire.
[Operation] According to the present invention, the terminal cover is elastically fitted to the body
without screwing by closing the opening of the terminal accommodating portion for
accommodating the input / output terminal with the terminal cover elastically fitted to the body
as described above. Thus, the terminal cover can be attached easily. Also, by forming a
connection terminal that protrudes through the insertion hole of the terminal cover on the
terminal board of the input / output terminal and temporarily fixes and solders the lead wire
from the volume adjustment block, the lead wire is connected using the connection terminal To
improve the connecting workability of the lead wire. Furthermore, by forming positioning
projections for positioning the lead wire on the terminal cover, the lead wire is positioned so as
not to be pinched between the terminal cover and the cover. Embodiment 1 FIGS. 1 and 2 show
an embodiment of the present invention. As shown in FIG. 1, the case 1 of the volume controller
of the present embodiment comprises a box-like body 10 having an open upper surface, and a
cover 20 attached to the open surface of the body 10, and For example, it is formed into three
modules (one wiring module of three vertically attached to a size) of the manufactured readymade wiring equipment. At one end inside the body 10, another 5! A terminal storage portion 13
is formed to divide the three into 12 sections and to connect the input / output lines in an
interlocking manner. Each input / output terminal 3 is composed of a terminal plate 31.2 lock
spring 32 and a release button 33. The terminal plate 31 is formed in a U-shape opening
downward, and the locking spring 32 and the release button 33 are accommodated inside, and as
shown in FIG. 2, the connection piece 31m is cut and raised upward, and this connection is made
The lead wire 7 from the volume adjustment block 5 is fitted in the slit 31b formed at the tip of
the piece 31m and can be temporarily fixed. The lock spring 32 is formed in a substantially C
shape, and includes a pressing piece 32m formed by folding back on [email protected] side and a locking
piece 32b facing obliquely upward on the other end side, and the terminal storage portion When
an input / output line is inserted through a wire insertion port (not shown) drilled on the bottom
surface of 13, the core portion of the input / output line is elastically held between the locking
spring 32 and the inner surface of the terminal plate 31. The locking piece 32b of the locking
spring 32 is configured to stop the removal of the input and output lines. A release button 33 is
interposed between the locking piece 32b of the two lock springs 32 and the terminal plate 31
and the release button 33 is pushed up through a release hole (not shown) formed on the bottom
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surface of the terminal storage fB13. Thus, the distance between the locking piece 32b of the
locking spring 32 and the inner surface of the terminal plate 31 can be expanded to allow the
input and output lines to be removed.
The terminal cover 4 is attached to the upper surface of the terminal storage portion 13. The
terminal cover 4 is formed with an insertion hole 40 for inserting the connection piece 31m of
the terminal plate 31. With the terminal cover 4 attached, the lead wire 7 is temporarily fixed to
the slit 31b of the connection terminal 31m. Can be soldered. Two claws 41 are respectively
formed on both ends of the terminal cover 4 opposite to the side walls of the body 10, and the
claws 41 are resiliently fitted in the fitting holes 14 formed in the body 10, respectively. The
terminal cover 4 can be attached by one-touch attachment. Further, two pairs of projections 42
are formed to project from each other on one side of the upper surface of the terminal cover 4
and the lead 7 is positioned through the lead 7 as shown in FIG. To prevent the lead wire 7 from
being pinched between the terminal cover 4 and the cover 12 when the cover 12 is attached. The
sound volume 111g block 5 for performing the sound tag of the speaker is configured by
mounting the volume 52, the resistor 53 for the attenuator, and the like on the printed circuit
board 51, and the a end side of the body 10 (7 ') terminal accommodating portion 13 described
above The connection with the input / output terminal 3 is performed by the lead wire 7 as
described above. By the way, when the resistor 53 is used with the resistor 53 as a seventennator, the input capacitance may be insufficient, so the storage portion 11 of the volume
adjustment block 5 is formed so that the transformer can be used as an attenuator taking this
into consideration. It is Specifically, a pair of ridges 115m and 15b are formed on the inner
surfaces of both side walls of the body 10 in the vertical direction, respectively, and the core
portion of the transformer is inserted and fixed in the open ridges 115m and 15b. Further, in the
storage portion 11, the supports for supporting the lower surface of the printed circuit board 51
are formed with ribs 16a to 16e on both sides, and the cylindrical support is formed with a rib
16d at the central portion on one end side. When the resistor 53 is used as an attenuator, the
locking claw 16e is formed on the other end side of the storage portion 11, and the hole 51a for
inserting and locking the locking claw 16e in the printed circuit board 51 is formed. By locking
the locking claws 16e in the insertion holes 51a, the vertical movement of the printed circuit
board 51 is prevented. Here, the ribs 16h and 16c are integrally formed on the ribs 15a and 15b,
respectively. Furthermore, the receiving portion of the body 10 is open on both sides of the
forming portion of the rib 16a and the other end wall portion so that the heat generated by the
volume control probe 5 can be well dissipated through the opening 18.
In addition, it is necessary to make the vertical width of the part which bridge ¦ crosslinks the
both sides of the opening 18 part into the width which can fully ensure the intensity of the body
10. The operation knob 55 is press-fit and attached to the volume 52 of the volume adjustment
block 5. However, the W amount lpl in the present embodiment. In the case of the alignment
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device, the fixing plate 56 is used so that the force applied to the operation mass 55 does not
reach the volume 52 and the printed circuit board 51. 7) The fixing plate 56 receives the
mounting piece 56a formed at the wi end in the three recesses 17 recessed in the upper part of
the both side walls of the body 10 and fixes the mounting piece 56a to the body 10. An insertion
hole 56b for inserting the operation shaft 52a of the volume 52 is formed at the center of the
fixed plate 56, and the operation mark 55 is press-fit and attached to the operation shaft 52a
projecting from the insertion hole 56b. Further, the other end of the fixing plate 56 forms a dent
in a shape avoiding the transformer, and a stopper 56e which prevents turning of the operation
knob 55 is formed at the center of this dent. That is, when the operation knob 55 is turned, the
step portion 55a formed in the lower part of the operation lump 55 abuts the stopper 56c so that
the operation knob 55 can not be rotated further. Furthermore, as shown in FIG. 3, concave fi
56m for passing the lead M7 is formed on both ends of the fixing plate 56 on the end side cover
4 side. The cover 20 is a rectangular box having an open lower surface through which the
rectangular opening of the attachment frame 6 is opened, and the outer collar 21 is formed at
the lower part of both side surfaces. The engaging claw piece 22 is formed, and the engaging
claw piece 22 is engaged with the engaging hole 14 formed in the receiving portion 11111 and
the engaging hole 14 in which the engaging claw of the terminal cover 4 is engaged and
engaged. Then, the cover 20 is attached to the body 10. In the outer collar portion 21, four fixing
claws 23 for fixing to the mounting frame 6 made of synthetic resin are respectively provided on
the outer side in a protruding manner. In addition, in consideration of fixing to a metal mounting
frame, the fitting hole 24 is formed in the gA wall on the base end side of the outer collar portion
21. A circular opening 25 is formed in the upper surface of the cover 20 to expose the upper
portion of the operation knob 55. A rib 55b is provided on the periphery of the operation knob
55 so that the outer diameter of the rib 55b is larger than the inner diameter of the opening 25
(so that the operation knob 55 does not come off the opening 25). In the assembly of the volume
controller of this embodiment, the terminal device [3 is incorporated in the terminal storage
portion 13 of the body 10, the terminal cover 4 is attached, and the printed circuit board 51 on
which the volume 52 etc. is mounted is stored. Contained in the part 11 (in the case of using a
transformer as an attenuator, the transformer is also contained in the storage part 11), and the
fixing plate 56 is attached to the body 10! ! !
Then, the control knob 55 is attached to the volume 52, and finally the cover 20 is attached to
the body 10 to perform. The one side piece 61 of the mounting frame 6 made of synthetic resin
for fixing the volume adjuster of this embodiment is formed with a plurality of insertion holes 63
for roughly inserting the fixing claws 23 formed on the cover 20. The outer side of the other side
piece 62 is provided with a side plate 64 in which a convex release piece 65 is formed at the
311I location, and a space formed by the side piece 62 and the side plate 64 corresponding to
both shoulders of the release piece 65 is The locking holes 66 are for locking the fixing claws 23
of the cover 20. That is, in a state in which one fixing claw 23 is inserted into the locking hole 66,
the volume adjuster inserts the other fixing claw 23 into the insertion hole 63 using the visibility
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of the side plate 64 and attaches it to the mounting frame 6. Then, when removing the volume
adjuster from the mounting frame 6, pressing the release piece 65 formed on the side plate 64
outward with a driver or the like to remove the fixing claw 23 from the locking hole 66, the other
fixing claw 23 is also inserted into the insertion hole Get out of 63 When the volume adjuster
fixed to the mounting frame 6 in this manner is embedded in a wall surface or the like, the input
/ output line drawn into the embedded box (not shown) embedded in the wall surface is input to
the input / output terminal 3 The connection is completed, and the mounting frame 6 is screwed
into the embedding box through the screw insertion hole 67, and the decorative plate or the like
is screwed to the plate screw hole 68 and fixed, thereby completing the mounting. According to
the present invention, as described above, since the opening of the terminal storage portion for
storing the input and output terminals is closed by the terminal cover elastically fitted to the
body, the terminal cover is elastically fixed to the body without screwing. It can be fitted and
fixed, and the mounting workability of the terminal cover can be improved. In addition, since the
connection terminal is formed to project through the insertion hole of the terminal cover on the
terminal board of the input / output terminal and temporarily fix and solder the lead wire from
the volume adjustment block, the lead wire is connected using the connection terminal The lead
wire connection workability is improved. Furthermore, since the positioning projections for
positioning the lead wires are formed on the terminal cover, the lead wires are positioned so that
the darkness of the terminal cover and the cover is less than 4 *.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is an
explanatory view showing a method of connecting a terminal plate and a lead wire thereon, and
FIG. 3 is an explanatory view of a wiring state of the lead wire.
1 is a case, 3 is an input / output terminal, 4 is a terminal force, 6 is a mounting frame, 7 is a lead
wire, 10 is a body, 11 is a housing portion, 13 is a terminal housing portion, 14 is a fitting hole,
and 20 is a cover 31 is a terminal plate, 31a is a connection piece, 32 is a locking spring, 40 is a
through hole, 41 is a nail, and 42 is a projection.
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