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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a conventional
ring-type flat speaker device, FIG. 2 is a cross-sectional view showing a conventional coaxial ringtype flat speaker device, and FIG. FIG. 4 is a cross-sectional view of a ring-type flat speaker device
according to another embodiment of the present invention, and FIG. 4 is a cross-sectional view of
a ring-type flat speaker device according to another embodiment of the present invention. 5 ·
23.24 · · · · · · Magnetic circuit, 11 · 41 ° 44, 47 · · · · · · · · · · · · · 43 · 46 ° 48 · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · , 38.39 · · · · · · · Ring diaphragm.
[Detailed description of the invention] The present invention relates to a flat-diaphragm, which
forms a flat diaphragm ring diaphragm with a foaming agent and gradually thickens the position
1 which is recessed from the inner and outer peripheral edge supporting the diaphragm. 1. . The
ring-type flat speaker device with excellent frequency characteristics Q and less noise reduction
by 1 m can be obtained. In order to be effective, the ring type flat speaker device had the
configuration as shown in FIGS. 1A and 5i12. That is, 3 ") gtt // 41 shown in FIG. 4 is a magnet(1), a top plate (2), a plate (3), and a magnet piece of a pole piece (4). Flat ring vibration
supported by a voice coil (8) well mounted on a bobbin (7) housed in the part (6) and further
supported by a 4411 member .sigma. D extended to the bobbin (7) in a freely vibrating manner
Inside the plate (9) attached to the holding member fi · extended from the pole piece (4): attached
to the frame 11 フ レ ー ム supported by the 11B edge 11 エ and the d′ U top plate (2) It is
configured to be supported by the outer collar edge 113. In addition, the one shown in FIG. 2 is a
coaxial ring type flat speaker 9, and high, middle, and low-frequency flat blood are arranged in
the same bowl. Tsuma 9 high, middle range magnet + 141, low X-magnet 15 1 each magnet 0-1u
41151 plate 1iiQ 71s high, middle range top plate)-) tl 19, and low range top plate 119, ^ Hall
piece for area, pole piece for middle area O and pole piece for low area @, ^ for medium area,
magnetic gap for low area and magnetic field for low area II ! ! 11 (d) C-A bobbin housed in C-(2)
(2) k winding 2) a voice coil CID (u (Kl, further driving member extended to each Fujiki bobbin
fake @ 橢) 6) The inner edge 146− and the top plate curved with the flat plate-like ring vibration
& surface @ (2), which is driven by (6)-6 and finely supported, attached to the pole piece 1210
and the holding member I extended respectively The outer edge I attached to the support
member #X is attached to the support member, the inner edge attached to the holding member
frame and the holding member attached to the pole piece I 2 D are similarly attached. The inner
edge 1471 and the magnet I !! are attached to the holding member by means of the measuring
edge. The mountings are each configured on a frame 4g-which supports the circuit @ .OMEGA.
And has the outer edge mounted thereon. -By the way, 3P surface used in Figs. 1 and 42; ring
diaphragm of type (9) · · · (S) and (2) a uniform comparison between F plate b υ A honeycomb
core ω having a target thickness was interposed.
In such a ring-moving plate (9) · -6116a, the overall thickness is uniform, and the portion to
which the driving member σD- is attached is also uniform in a bird's-eye view. Since the plate is
also flat, collusion due to thickness uniformity occurs in the peristaltic plate itself, and not only
narrowing the frequency range for number of applications (3), but also the sound emitted from
the edge and the radiation from the diaphragm The sound had a defect such as causing
deterioration of the sound due to the thickness of the inside and outside J edge of the inside and
outside of the room. SUMMARY OF THE INVENTION The present invention represents the abovementioned drawbacks, and prevents M4tIL number range expansion and soot buffer, and further
provides an easy-to-make, flat-panel speaker device. Please refer to Figure 3 and Figure 44
below! The first embodiment of the present invention will be described in detail with reference to
the first embodiment of the present invention. However, the same reference numerals will be
given to the first and second parts of FIG. That is, in the door 3 shown in FIG. 5, the drive
member συ is supported so as to be able to vibrate, and the ring moving plate − is fixed at 1;
this 遁 I @ plate − is i! i! Using a foaming agent such as a high quality urethane foam, its
shape is configured to be thinner near the junction S with 1 inside and outside 1UUU; *, and to be
thicker as it gets farther from the inside and outside edge IIIIQJ. ing. Also, for the high, middle
and low tone rings & 1illl plate thnas as shown in Fig. 4, a foam layer such as urethane foam of 1
λ is used immediately between 4rd and 3rd. The area around the binding with the edge 1411 ton---is formed so that the thickness gradually decreases in the vicinity of the thin <, 11w inner and
outer-edge axis DI--· ·, · nr +- ing. Of course, upper and lower plates or 4A may be provided on the
surface of the foam as required. According to the ring diaphragm of the present invention
configured as described above, in either case of FIGS. 3 and 4, the attachment of the four driving
members is the thickness of the diaphragm from the inside to the outside of the hole. Since the
occurrence of resonance of the diaphragm itself becomes t because of the non-uniformness of
the diaphragm itself, the width of the frequency band for length and the inner and outer
peripheral edges of the diaphragm become thinner at the inner and outer edges. It has an
advantage that it is possible to prevent the deterioration of the sound by reducing the till of the
sound radiated from the diaphragm and the sound radiated from the edge because the form and
angle of the mm & becomes wide. It is a thing.
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