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DESCRIPTION JPS61200799

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DESCRIPTION JPS61200799
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device, and more particularly to a speaker device in which a reinforcing member for
reducing plate vibration is attached to a speaker cabinet. It is known that the taking action of a
speaker mounted on the baffle plate of the prior art speaker cabinet also takes the baffle plate
through the frame. Then, when the baffle plate moves, the back plate is also vibrated via the side
plate, and as a result, the entire speaker cabinet is moved. When the speaker cabinet vibrates, the
sound radiated from the speaker is affected by distortion or deterioration of transient
characteristics, and so the vibration of the speaker cabinet needs to be reduced as much as
possible. For that purpose, a method of reinforcing the speaker cabinet by a reinforcing member
is taken. As such a method, the "speaker apparatus" of Japanese Utility Model Publication No. 551116, and the "speaker cabinet" of Japanese Utility Model Application Publication No. 59-81178
are known. FIG. 4 is a cross-sectional view of the above-mentioned speaker device, in particular,
FIG. 4 (a) shows a longitudinal cross-sectional view, and FIG. 4 (b) shows a cross-sectional view.
In FIG. 4, the slippery oyster 1 has a baffle plate 2, a side plate 3, a back plate 4, an upper plate 5
and a bottom plate 6, and a speaker 7 is attached to the baffle plate 2. Between the vicinity of the
central portion where the vibration of the baffle plate 2 is the largest and the connection
between the side plate 3 and the back plate 4 where the vibration is the smallest, a reinforcing
member 8 in the shape of? Is attached. As described above, by reinforcing the speaker cabinet 1
with the reinforcing member 8, the vibration of the baffle plate 2 is suppressed to the same
degree as the vibration of both end portions of the back plate 4 with the least vibration. FIG. 5 is
a cross-sectional view showing a speaker cabinet according to the above-mentioned Japanese
Utility Model Application Publication No. 59-81178, and FIG. 6 is a perspective view showing a
part of the reinforcing member shown in FIG. In the example shown in FIGS. 5 and 6, the first to
third members 91 to 93 are formed in a triangular shape, and are formed between the baffle
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plate 2 and the side plates 3, 3 and the back plate 4 and the side plates 3.3. Mounted between
The reinforcing member 9 attached to the baffle plate 2 side connects the first member 91 and
the second member 92 in a foldable manner by the joint 94, and the connecting surface of one
end of the first and second members 91.degree. Attached to the center of the baffle plate 2 and
attached the other end of the first and second members 91.92 to the side plate 3, 3. A third
member in the opening of the other end of the first and second members 91.degree. Attached 93.
Also, the reinforcing member 9 on the back plate 4 side is similarly configured, and the
connecting surface of the first and second members 91.92 is attached to the back plate 4, and
the other members of the first and second members 91.92 The end is attached to the side plates
3 and 3, and the third member 93 is attached between them.
Problems to be solved by the invention In the speaker box shown in FIG. 4, when the reinforcing
member 8 is formed, one end of the reinforcing member 8 is in close contact with the baffle plate
2 and the other end is the corner of the side plate 3 and the back plate 4 It needs to be
manufactured with high precision so as to be in close contact with parts. If a dimensional error or
the like occurs when manufacturing the reinforcing member 8, a gap is generated between the
side plate 3 or the back plate 4, and the vibration of the baffle plate 2 can not be sufficiently
reduced. On the other hand, in the example shown in FIG. 5, since the first member 91 and the
second member 92 of the reinforcing member 9 are formed so as to be bendable by the joint 94,
even if a slight dimensional error occurs, The open ends of the first and second members 91.92
can be in close contact with the side plate 3. However, in order to connect the first and second
members 91.92, the joint 94 must be provided, and furthermore, the reinforcing members 9
must be provided on the baffle plate 2 side and the back plate 4 side, respectively. There is a
drawback that the structure becomes complicated. Furthermore, it is impossible to completely
eliminate the vibration of the speaker cabinet even if the reinforcing members 8 or 9 are
attached as described above. However, when mass producing speaker cabinets, it is necessary to
make the vibration characteristics of the individual speaker cabinets as uniform as possible. For
this purpose, for example, as is known from Japanese Utility Model Publication No. 58-24541
"Speaker system", a fixed reinforcing bar and an appropriately variable additional reinforcing bar
are provided outside the speaker cabinet bottom plate; There is a way to make the vibration
characteristics of the speaker cabinet uniform by changing the number. However, this method
has the disadvantage that in addition to the reinforcing member for reinforcing the inside of the
speaker cabinet, a reinforcing member for adjusting the vibration characteristic must be
provided. Therefore, a main object of the present invention is to provide a speaker apparatus
provided with a reinforcing member which can reinforce a speaker cabinet without requiring
machining accuracy. Another object of the present invention is to provide a speaker device in
which the vibration characteristics can be adjusted by changing the connection strength of the
reinforcing member. Means for Solving the Problems In the first invention, a first reinforcing
member for connecting between the vicinity of the central portion of the baffle plate and one of
the connecting portions of the side plate and the back plate, and the connecting portion of the
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side plate and the back plate The reinforcing member is configured by the second reinforcing
member that connects between the other of the two and the vicinity of the central portion of the
first reinforcing member, and the baffle plate, the side plate, and the back plate are connected.
A second invention is a speaker device provided with an adjusting member for adjusting the
connection strength between the first reinforcing member and the second reinforcing member. In
the first aspect of the invention, the first reinforcing member connects the vicinity of the central
portion of the baffle plate to one of the connecting portions of the side plate and the back plate,
and the connecting portion of the first reinforcing member to the side plate and the back plate
The connection between the baffle plate and the side plate and the back plate can be firmly
connected even if the manufacturing accuracy of the reinforcing member is a little worse. As a
result, there is no possibility of forming a gap between M at the dark connecting portion between
the reinforcing member and the baffle plate, the side plate and the back plate, and the vibration
of the baffle plate can be well suppressed. In the second invention, since the connection strength
between the first reinforcing member and the second reinforcing member is adjusted by the
adjusting member, it is possible to achieve variable and uniform imaging characteristics in each
speaker cabinet. it can. Embodiment 1 FIG. 1 is a cross-sectional view of a speaker device
according to an embodiment of the present invention, in particular, FIG. 1 (a ′ ′) shows a
longitudinal cross-sectional view, and FIG. In FIG. 1, a first reinforcing member 10 is provided
between the baffle plate 2 of the speaker cabinet 1 and one end of the connection portion of the
side plate 3 and the back plate 4. A second reinforcing member 11 is provided between the first
reinforcing member 10 and the other end of the connection portion of the side plate 3 and the
back plate 4. One end of the first reinforcing member 10 is obliquely cut so as to be in contact
with the baffle plate 2 and the other end is cut so that the cut is at a right angle so as to be in
contact with the side plate 3 and the back plate 4. Further, one end of the second reinforcing
member 11 is cut at a right angle to the longitudinal direction so as to be in contact with the first
reinforcing member 10, and the other end is other than the connecting portion of the side plate 3
and the back plate 4 It is formed to be approximately right angle so as to contact the end. By
constructing the first and second reinforcing members 10.11 in this manner, the machining
accuracy of the first reinforcing member 10 is somewhat worse (even if the first direction in the
six arrow directions shown in FIG. 1 (b) If the reinforcing member 10 is displaced, one end can
be brought into close contact with the inner surface of the baffle plate 2 and the other end can be
brought into close contact with the inner surface of the side plate 3 and the back plate 4.
Furthermore, the second reinforcement member 11 is also pushed in the direction of arrow B
shown in FIG. 1 (il) to increase the connection strength between the baffle plate 2 and the side
plate 3 and the back plate 4 by the first reinforcement member 10. The connection strength
between the first reinforcing member 10 and the connection portion of the side plate 3 and the
back plate 4 can be further enhanced. FIG. 2 is a cross-sectional view of another embodiment of
the present invention. The embodiment shown in FIG. 2 is constructed such that the bolt 12 and
the nut 13 clamp the space between the first reinforcing member 10 and the second reinforcing
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member 11 shown in FIG. .
Then, since the second reinforcing member 11 moves in the direction of the arrow C in
accordance with the tightening ratio of the bolt 12 and the nut 13, the connection strength of the
first reinforcing member 10 and the second reinforcing member 11 is adjusted. Thus, the
vibration characteristics of the speaker cabinet can be adjusted. FIG. 3 is a cross sectional view
showing another embodiment of the present invention. In the embodiment shown in FIG. 3, the
third reinforcing member 14 is provided between the baffle plate 2 and the second reinforcing
member 11 so as to be parallel to the first reinforcing member 10. The third reinforcing member
14 and the first reinforcing member 10 are configured to be tightened by the bolt 12 and the nut
13. Thus, by providing the third reinforcing member 14 and tightening the third reinforcing
member 14 and the first reinforcing member 10 with the bolt 12 and the nut 13, the second
reinforcing member 11 is shown in FIG. Since a force is applied in the direction of the arrow and
a force is applied to the third reinforcing member 14 in the direction of the arrow E, the
reinforcement strength can be further enhanced, and the connection strength can be adjusted. As
described above, according to the first aspect of the present invention, the first reinforcing
member connects between the vicinity of the central portion of the baffle plate and one of the
connecting portions of the side plate and the back plate. Since the reinforcing member is
connected to the other of the connecting portions of the side plate and the back plate, the baffle
plate, the side plate, and the back plate can be strongly reinforced with a relatively simple
structure and without requiring machining accuracy. Can. Furthermore, in the second invention,
since the adjustment member for adjusting the connection strength between the first
reinforcement member and the second reinforcement member is provided, the vibration
characteristic of the speaker cabinet is extremely enhanced by this adjustment member. It can be
easily adjusted.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view of a speaker device according to an embodiment of the present
invention, in particular, FIG. 1 (a) shows a longitudinal cross-sectional view and FIG. 1 (b) shows a
cross-sectional view.
FIG. 2 is a cross-sectional view of another embodiment of the present invention. FIG. 3 is a cross-
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sectional view of another embodiment of the present invention. FIG. 4 is a cross-sectional view of
a conventional speaker device, in particular FIG. 4 <a> showing a longitudinal cross-sectional
view and FIG. 4 (b) showing a cross-sectional view. FIG. 5 is a cross-sectional view showing
another example of the conventional speaker device. FIG. 6 is a perspective view showing a part
of the reinforcing member shown in FIG. In the figure, 1 is a speaker cabinet, 2 is a baffle plate, 3
is a side plate, 4 is a back plate, 10 is a first reinforcing member, 11 is a second reinforcing
member, 12 is a bolt, 13 is a nut, and 14 is a third The reinforcement member of Figure 1 heart
2 figures 3 figures / j nut
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