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JPS5622877

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DESCRIPTION JPS5622877
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view showing a microphone unit of
a cine camera having a simultaneous recording mechanism to which the basic example of the
present invention is applied, FIG. 2 is an exploded view showing the configuration of the
microphone unit, FIG. The figure is an exploded view showing the configuration of the head case
assembly of the same microphone unit, FIG. 4 is a side sectional view showing the configuration
of the microphone assembly of the same microphone unit, and FIGS. 5a, 5b and 5c are
respectively the same microphone-crophone assembly Top view, side view and bottom view
showing the shape of the frame, FIG. 6 is an exploded view showing the configuration of the
microphone unit of the same microphone assembly, and FIGS. 7a and 7b are front views showing
the shape of the weight of the same microphone unit. Fig. 8a, a side view showing the drawing
and a partial cross section. b and c are respectively a top view showing the shape of the first unit
cap of the same microphone unit, a side view and a side view showing a partial cross section, and
FIGS. 9 to 11 are perspective views showing the shape of the elastic member Sectional view and a
front view showing a state where it is attached, FIGS. 12a and 12b are a side sectional view and a
front view showing an embodiment of a vibration isolation mechanism of a microphone
according to the present invention, and FIGS. It is sectional drawing and the front view which
show another Example. Dan ... Maikurohon portion, 12 ... support, Akira ... microphone Assen
blanking U, 14 ... first Metsushu, ■ ... head case assembly bar 16 ... opening, 17 ... head base, 18
... recess, 19 ... attaching portion, 20 ... screw, 21 ... connecting lines 22 ... connection electrode,
23 ... head case, 24 to 26, · · · 2nd to 4th mesh, 27 to 29 ... 5th to 7th mesh, 30 ... frame, 31 ...
microphone unit · 32 ... elastic member, collar ... Through holes 34. β5: locking portion, 36. 37:
through hole portion, 38. 39: through hole portion, 40: microphone body, 41: mounting portion,
42: weight, 43 · · · Sound collecting unit, 44 · · · first unit cap, 45 · · · second unit cap, 46 · · ·
through hole 1.47 · · · first mounting portion, 48 · · · second Mounting part of 49, Cap part 50,
Hanging part 51, 51. Flange part 52, Recessed part 53, L 54: Stopper, 30 'Frame , Dumpling ...
Microphone unit, 32 'elastic member.
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1
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration
isolation mechanism of a microphone suitable for use in, for example, a tape recorder or a serial
camera provided with a simultaneous recording mechanism. Recently, cameras equipped with a
so-called simultaneous recording mechanism capable of recording sound simultaneously with
shooting have become widespread. Such a cine camera is configured such that a microphone is
attached to the end of a rod-like support extending from the camera body, 2! 2! The
microphone can record audio in synchronization with the operation of the camera. By the way, if
the microphone is attached to the tip of the rod-like support simply extending from the camera
body as described above, mechanical vibration caused by the rotation of the motor built in the
cine camera main body acts upon the rod-like support when the cine camera operates. There is a
problem in that the signal is transmitted to the microphone through to deteriorate the SZN ratio.
Further, this problem is not limited to the cine camera, for example, in the case of a tube recorder
or the like, and the mechanical imaging movement of the motor causes the built-in microphone
to have a bad spring. For this reason, various measures for eliminating vibration have been
developed, such as wrapping the microphone with elastic buffer members in the past, but it has
been a book that none of them can obtain a sufficient effect. Therefore, conventionally, it has a
vibration isolation effect sufficient to eliminate the adverse effect of vibration to the microphone,
and can stably and reliably support the microphone, and can sufficiently meet the needs of the
user. There is a strong demand for the development of mechanisms. The present invention has
been made based on the above-mentioned circumstances, and provides a very good microphone
vibration isolation mechanism capable of stably and reliably supporting the microphone in 4 if
sufficient vibration isolation effect can be obtained. The purpose is Hereinafter, a basic example
in which the present invention is applied to a camera having a simultaneous recording
mechanism and will be described in detail with reference to the drawings. In FIG. 1, reference
numeral LJ denotes a microphone unit, which is attached to a cine camera body (not shown) via a
rod antenna-like support 12. As shown in FIG. 2, this microphone portion L ′ ′ covers a
cylindrical microphone assembly JJ with a first mesh 14 formed in a cylindrical shape by a fine
mesh member with fine eyes, and a substantially dome-shaped head case thereon Assembly L!
The opening 16 of the head case assembly Is is closed by the head base 17. Then, the mounting
portion 19 of the support 12---9131 is fitted in the concave portion 111 formed on the back
surface of the head case 11 and tightened with the screw 20 to secure the microphone unit and
the support 12. Is attached.
The connection line 21. 22 of the microphone assembly 13 is connected to the connection
electrode 22 formed in the mounting portion 19 of the support 12 through a not-shown through
hole which penetrates the head base 17. The connection electrode 22 is a turtle connected to the
microphone input terminal of the recording circuit of the cine camera main body via a
connection line (not shown) inserted through the inside of the support 12. Here, FIG. 3 shows the
details of the case case 715. In the head case 23 which has a cylindrical shape and the side
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surfaces thereof are cut out at a plurality of locations (three locations in the case shown). (1)
Second to fourth meshes 24 to 26 formed in cylindrical shapes different in size from reticulated
members different in the roughness of the eyes from one another are stored in an overlapping
manner. And, one end of this head case 23 is formed in the form of raw spheres different in
thickness by reticulated members different in the roughness of the eyes from each other, and 9th
to 7th −] ′ ′ If, A,. This is a book in which meshes 27 to 29 are stacked and attached. FIG. 4
shows details of the microphone assembly Jj. The microphone unit 31 is loosely inserted in a
cylindrical frame 30, and is suspended in the frame 30 by an elastic member 32 such as rubber.
The frame 30 has a large number of through holes 33 on one side as shown in FIGS. 5m, 5b and
5c, and locking portions 34. 35 are formed on both ends thereof at intervals of approximately 90
°. The locking portions 34.35 are formed by connecting the large diameter through holes 36.37
and the small diameter through holes 311.39, respectively. Thus, as shown in FIG. 6, the
microphone unit main body has a mounting portion 41 for holding the rear side surface of the
microphone main body 40 with the microphone main body 40, and the front surface of the
microphone main body 40. Of the first unit cap 44 covering from the side of the sound collecting
portion 43 and the second unit cover covering the weight 42 from the rear surface side
according to -7645. As shown in FIG. 7 (a) and 1 (b), the weight 42 is made of metal and has a
cylindrical shape, and a through hole 46 is formed at the central portion thereof. And the
attaching part 41 is provided in the one end part of the said weight 42 at about 90 degree space
| interval. The mounting portion 41 has a step in the shape of a side crank, and a first mounting
portion 47 and a second mounting portion 48 are formed. The weight 42 and the microphone
main body 40 are attached by fitting the rear peripheral side surface of the microphone main
body 40 between the first attachment portions 47.
At this time, the connection line 21.21 drawn out from the rear of the microphone body 40
passes through the through hole 46 of the weight 42 and is drawn out to the rear surface of the
weight 42. FIG. 7Cb) is a cross-sectional view of a portion indicated by an alternate long and
short dash line in the same figure (&). Further, as shown in FIGS. 8 (a), 8 (b) and 8 (e), the first
unit cap 44 has a diameter smaller than that of the cap 49 at one end of the substantially
cylindrical cap 49. A cylindrical hanging portion 50 is formed, and is configured to have a convex
shape on the side wall. A pair of flanges 51.51 is formed at an appropriate interval on the tip of
the hanging portion 50, and a recess 52 is formed. Then, by inserting the opening of the cache
unit 49 between the side surface of the microphone main body 40 and the second mounting
portion 48 of the weight 42, the microphone main body 40 and the first unit cap 44 can be
removed. It is to be worn. FIG. 8 (e) is a cross-sectional view of a portion indicated by an alternate
long and short dash line in FIG. 8 (&). On the other hand, the second unit character f45 has the
same configuration as that of the first unit character f44, and is attached to the rear of the
weight 42. Next, means for suspending the microphone unit 31 configured as described above
via the 11C elastic member 32 in the frame 30 will be described. That is, as shown in FIG. 9, the
elastic member 32 is formed in a cross shape, and a through hole 53 is formed in the central
01-05-2019
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portion thereof. Further, at each tip end portion, a bowl-shaped stt t54 is formed. ? As shown in
FIGS. 10 and 11, the through holes 53 of the elastic member 32 are formed in the hanging
portions 50 of the first unit cap 44, and the nine concave portions 52 are fitted. Next, the
microphone unit JJ is loosely inserted into the frame 30, and the stone 19-54 of the elastic
member 32 is drawn from the inside of the frame 30 to the outside of the frame 30 through the
large diameter through hole 36. Is slid in the direction of the small diameter through hole 38. For
this reason, the stone "-54" is locked to the locking portion 34 of the frame 30, and eventually
the first unit cap 44 is suspended at a substantially central portion of the frame 30 via the elastic
member 32 as shown in FIG. It is a book. また、#! The unit cap 45 of 2 is also suspended by
the elastic member 32 in substantially the same manner as in FIGS. 10 and 11 in the frame 30,
and in the end, as shown in FIG. It can be hung. Thus, according to the vibration isolation
mechanism of the microphone according to the nine basic examples configured as described
above, the machine by rotation of the motor of the aforementioned cineka r; Vibration can be
absorbed by the elastic member 32, and can be prevented from being transmitted to the
microphone unit J, and problems such as deterioration of the S / N ratio can be eliminated as in
the prior art.
In addition, each of the suspension members of the first and second uninoto anchors 7'4445 and
the retainers 34 of the frame 30 are pulled from the direction of the microphone unit shiver 4
(total 8 directions at both ends). Since it is securely attached to 35, the microphone unit can be
stably and surely supported. Furthermore, in the above basic example, the microphone unit 1J is
suspended from four directions, but it may be three directions as appropriate. By the way, in the
vibration isolation mechanism of the microphone according to the basic example configured as
described above, the microphone unit 31 is built up in the radial direction from both ends in the
cylindrical frame 30 and suspended by a plurality of elastic members 32 such as rubber. It is a
book that is supported in a steady state, but because the installation length of each elastic
member 32 can not be sufficiently taken by the folk song +/−, it exhibits sufficient ability in the
damping effect of the vibration transmitted from the outside A wonderful friend. In particular,
since the installation length of the elastic member 32 becomes shorter as the smaller-sized
microphone whose size is reduced, the vibration transmitted to the frame 30 @ tends to be
transmitted to the side of the microphone unit without sufficient attenuation. The Therefore, the
present invention has been made with particular attention to this point, and by bridging a
plurality of elastic members alternately between both ends of the microphone unit and between
the ends of the frame, the installation length of each elastic member can be made It is
characterized in that it can be made as long as possible so that the externally transmitted
vibration can be effectively damped. Next, one embodiment of the present invention based on the
outline as described above will be described in detail with reference to FIG. However, in this case,
in the configuration according to the basic example shown in FIGS. 1 to 11 described above
except for the relationship between the microphone unit and the hanging lower support portion
of FIGS. The description will be omitted, assuming that the configuration is the same as that of
01-05-2019
4
the bird-IL + K1 basic example. That is, in FIG. 12 (,), (b), 30 'is a cylinder having a large number
of through holes on the side and locking portions (in this case, 180.degree. Intervals in this case)
as in the basic example described above. It is a frame formed into a shape. Further, L 'is a
microphone unit configured as in the above-described basic example (except that the cap portion
is excluded). The microphone unit 1 ′ ′ is loosely inserted in the cylindrical frame 30 ′, and is
not mutually integrated with the caps 44 ′, 45 ′ made of, for example, rubber etc. attached to
the both ends without mutually crossing each other. (/... Are suspended and supported in the
frame 30 via a plurality of whisker-like elastic members 32 'which are projected in a shape of.
Here, the plurality of whisker-like elastic members 32 'are projected at both ends of the frame
30' with their front and rear directions alternately, and are stocked at the light traveling end.
−54 ′ is provided at both ends of the cylindrical frame JO ′ and supported by the nine locking
portions, and as a result 1) the microphone unit 31 ′ is in the center of the cylindrical frame jO
′ It is a book that is constructed to be coaxially suspended in the center. According to such a
configuration, since the microphone unit τ is supported by the frame 30 via the plurality of
elastic members 32 ′ alternately mounted at both ends thereof, each elastic member 32 ′ is
provided. The overall length of the frame is as long as possible, and as a whole, the external
vibration transmitted to the frame 30 'is sufficiently stably and reliably supported as a whole
without being attenuated and transmitted to the microphone unit 31'. A sufficient vibration
isolation effect can be exhibited. FIGS. 13 (a) and 13 (b) show the case where a plurality of sinklike elastic members 32 'are projected in directions symmetrical to those in FIGS. 12 (a) and 12
(b) as another embodiment. . Also in this case, as in the upper side, a sufficient vibration isolation
effect can be exhibited. In addition, the whisker-like elastic members 32 'having different lengths
from one another are always integral with the two oysters 44' and 45 '. イ、−なくてもよいもの
である。 The present invention is not limited to the embodiment of the present invention, nor is
it D, and various modifications may be made without departing from the scope of the present
invention, as described in detail above. According to this invention, it is possible to provide a very
good vibration isolation mechanism of the microphone which can obtain a sufficient vibration
isolation effect and can stably and reliably support the microphone.
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