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Patent Office 'Instructor N Fuji Hero cutting head 2, inventor's address ■ 221 address name 3112, Moriya-cho, Kana district, Kanagawa Prefecture, Kanagawa · Name (43'2) Victor Company
of Japan, President and Representative Director Yukiyoshi Matsuno 4; Agent 5 0033 509 [Phase]
Japan Patent Office ■ Japanese Patent Application Laid-Open No. 51-1.098030 Japanese Patent
Application No. 51. (1976) 9.29 Japanese Patent Application No. Sho ρ-3392 [phase]
Application date%, (197t) 3. Yu 2 examination request unclaimed (all 5 pages) Office serial
number-67 乙? λ, 10) C) -o, 3H04t / ';' Me / Mero specification 1, name of the invention
3. Detailed description of the invention Relating to the incongruent rJ cutting head, in particular
attached to the currently used Sugremekasogu ink head, using the mouth] 1 audio frequency
frequency range recording area recording area菖 勺? It is an object of the present invention to
provide a cutting head configured to be able to cut and record on the master without lowering
the 191 revolutions K of the multiplexed signal whole master including the angle modulated
wave signal. At present, the stereo cutting pad 1 shown in FIG. 1 is used as a device for cutting
and recording a 2-channel stereo signal on an acetate master. The stereo cutting head 1 is
provided with drive and feedback coils 4 and 5 movably on the magnets 2 and 5, and an opening
lever 7 to which the recording needle 6 is attached is connected to the coil frame through a pair
of connecting rods 8 and 9ft. And make up. In this stereo cutting head 1, when a signal within
the audible frequency band is applied to the drive coils 4 and 5, the recording needle 6 will be
displaced in a faithful manner in response to this signal. However, since the listening frequency
band of about 50 Hz to 15 KHz is in the Kug ink use frequency band of the Sguereo cutting head
1 configured as described above, this Sguereo cutting head 1 can be used as a direct wave signal
and 1l IJ II 11 'Ji! In the case of creating a WL board EndPage: 1 of a multi-channel record in
which a multiplexed signal with a stone number band modulation wave signal is recorded at a
frequency higher than his number band, the following method is currently adopted. There are
various disadvantages associated with this. That is, the rotational speed of the cutter race
turntable is reduced, and the 3 acetate master disk 10 can not rotate at a half speed of the speed
at the time of reproduction. I cut it. In this low-speed cutting method J, it takes a long time for
cutting, and since the cutting speed is low, the cutting conditions are deteriorated and a good
cutting surface (record groove surface) can not be obtained. Furthermore, there is a disadvantage
that it is necessary to appropriately correct the tape speed of the tape recorder for record
cutting, the equalizer characteristics of the tape recorder, and the characteristics of the cutting
head drive amplifier circuit. The present man removes the above-mentioned various defects,
rotates the acetate master at the same speed as the reproduction by using a ceramic material
such as piezoelectric ceramics, and cuts off the frequency signal of the listening frequency band
or more and records p41 J The present invention is constructed as described below, and will be
described with reference to its one embodiment along with its own.
2 is an enlarged front view of one embodiment of the cutting head 11 according to the present
invention, FIG. 6 is a diagram showing the adhesive application principle of the knain and the go
head 11, and FIG. It is a figure which shows the state which mounted ¦ worn the head 11 with
the stereo cutting head 1. As shown in FIG. In FIG. 2, the holding body 12 has an inverted Yshape, and the plate-like branch arms 15a and 13bi are set to all 90 degrees of the opening
angle. Further, the branch arm portions 13a and 13b are made of an elastic material such as a
spring material, and vibrators 14a and 14b such as piezoelectric ceramics or Rochelle salt are
adhered to inner surfaces of the tip end portions of the respective branched arm portions 13a
and 13b. A fixture 15 is adhered between the tip surfaces of the vibrators 14a and 14b, and the
recording needle 16 is attached to the fixture 15. . A pair of vibrators 14a and -4bi is mounted
with its direction angle set at 90 degrees as indicated by the lines A-A 'and B-bi lines, in which
the direction in which the piezoelectric constant increases (hereinafter referred to as the
vibration direction) is indicated by AA' and B-bi. Therefore, as will be described later, each of the
directions AA 'and BB' in the cross section perpendicular to the longitudinal direction of the
signal groove cut according to the vibration of each of the transducers 14a and 14b as described
later. The displacement according to the vector prevents the occurrence of crosstalk during
reproduction. Here, it vibrates with a relatively small constant amplitude according to the electric
signal ranging from the number H2 of each perturbator 14a and 14b to the number 100 KHz.
For example, in the case where the dimensions of the vibrators 14a and 14b in the vibration
direction & 2 mm, the amplitude in the above direction is about 0.8 μm although it is different
depending on the material of the ceramic. When the vibrators 14a and 141) vibrate, each branch
arm 13a and 13 [is elastically deformed in the direction of the opening angle, and each peristaltic
member is affected by the vibration of the other vibrator @, -x Vibrate independently and freely.
Next, the cutting head 11 is mounted on an object having a larger mass than this, for example,
the stereo cutting head 1 shown in FIG. The amplitude of the recording needle 16 in cutting is
tweaked together with FIG. Cutting Hera l- "110 names of vibrators 14a and 14F) One end of
both sides is supported between arms of the U-shaped rigid frame 18 by means of a sprinkle and
an elastic damper in an isometric manner as shown in the figure. Can be regarded as
corresponding to the oscillator 19. Further, it is assumed that the mechanical impedances of the
vibrators 14a and 14b and the fixture 15 are much larger than the mechanical impedances of the
plate-like branch arms 15a and jib and the acetate master.
Here, kl and C1 are the equivalent spring constant and viscosity damping constant of the acetate
master 17, and k2 and C2 are equivalent spring constants and viscosity damping constant of the
branch arm 15a and t3b, respectively. When an electric field E is applied to the piezoelectric
ceramic vibrator 19, the vibrator 19 stretches and vibrates as shown by a broken line in FIG. At
this time, the amplitude SBS-51AS2 = KE... Here, K is the piezoelectric constant of the vibrator 19,
S1 is the amplitude applied to the acegate master, and 52 is the amplitude applied to the branch
arm Vc. When the vibrator 19 is stretched as shown by a broken line, since it is supported
between the arms of the rigid body frame 18 in the form of a flat plate, the following equation
holds. EndPage: 2 F 2 s + (kl) j ω C 1 = 82 (k 2-1 j ω c 2)... Where F is an external force acting on
the vibrator 19. Here, it is a member to be cut of the sound recording needle 16 so that it is a
mechanical member for the setting master plate, ZM1 =-. The mechanical impedance ZM2uZJyi2
=-'for the entire 16 cutting heads. S1'ZM2S2ZMi1 is derived from the above 0 to 0 equation.
Here, since the acetate master is cut by heat cutting, it becomes ZMl (ZM2, and the second term
of the equation 0 can be ignored compared to the first term. Therefore, when the vibrator 19
vibrates as S 'qs1, most of it is converted as the displacement of the recording needle 16 to its
amplitude and the vibration is applied to the signal groove of the acetate master, and the
vibration is applied to the child 19 (14a, 14b) The signal is recorded. That is, when each of the
vibrators 143 and 14E is stretched and vibrated, cutting of the recording needle 16 is performed
for the angular deformation 1C of the branch arms 13a and 13b at ten thousand in the city width
and for the other at two. Acts as a position in the groove. Here, in order to perform so-called
heating cutting in which the acedate master is completely cut, which is n0 heating, to the sound
recording needle 16, the latter has a value considerably smaller than that of the former
resistance ri. Because of this, shooting l1li of the oscillators 14a, 14b? Most of it is converted to
the displacement of the recording needle 16 t, and the signal groove is directly recorded from a
frequency of 1 orange frequency over 0) listening frequency. Next, the Kagayan head 11, which
is an example of the present invention, is attached to FIG. 4 r (as shown in FIG. Multiplexing with
the wave signal flashes about one piece when recording the issue on the master.
Since the amplitude of the direct wave signal is larger than the amplitude of the oscillators t4a
and 14b in the master of the multi-channel record, the oscillation of the oscillators 14a and 14b
prevents the direct wave signal from being generated. It is possible to cut f gui 1). However, since
the amplitude (about 0.2 pmm degree) of the modulated wave signal to be angled is smaller than
the amplitude of the vibrators 14a and 14i, the modulation by the vibration of the vibrators 14a
and 14b is Wave signal or cut l! 111 are recorded. As shown in FIG. 4, the cutting head 11 is
attached to the shank 7 of the holding body 12 with a cantilever 7 IFH instead of the hooking
needle 6 and is added to the stereo cutting head 1. . For the direct seed wave signal in the kiss
frequency band, it is added to its left and right channel signal 7 '; At the same time as this, an
angle modulated wave signal that is outside the town audio frequency band is generated by the
transducers 143 and 14bVc. When the first contact wave form is added to the carp, rubs 4 and 5,
this VCLL 1 cut ink [vibrates by vibrating with the entire head 11 or the roaring needle 16].
When the bite is applied to the vibrators 14a 'and 14)), 1'f harmonics 15' and -11 are generated.
The vibrators 14a and 14b pick up and move in the shooting direction, and in response thereto,
the recording needle 16 and the cantilever 7 of the stereo cutting head 1 vibrate and displace
independently. Accordingly, the vibration due to the coils 4, 5 and the vibrators 142, 14b is
synthesized (superimposed) on the five sound recording needles 16 so as to vibrate. For this
reason, while the acetate master 17 is rotating at the same speed as the reproduction, the Eri
signal groove is cut and recorded on the recording needle 16, and a direct wave signal in the
audio frequency band and an angle modulated wave signal outside the audio frequency band A
signal groove in which is multiplexed is formed. With respect to the cutting head 11, when the
vibrators 14a and 14b vibrate, the recording needle 16 is machined when the whole cutting head
system is viewed from the mechanical impedance of the acetate master 17 which is the member
to be cut and the recording needle 16. It oscillates over the amplitude of the value represented
by the inverse ratio to the impedance. Here, the cutting with respect to the acetate board 17 is a
heating cutting, and since it is considerably smaller than that of the former mechanical in-hidan
xi latter, the vibration of the vibrator 14a and the EndPage: 314'b is almost the recording needle
16 Is converted to vibration of In the above embodiment, the opening angle between the pair of
branch arm portions 13a and 13b is set to 90 degrees, but this opening angle can be
appropriately set. In this case, the vibrator 14'3, 14bl-j It may be attached to the bifurcated arm
through an appropriate spacer, and the direction of the dog's piezoelectric constant may be set to
be orthogonal.
As described above, when the cutting head according to the fourth aspect of the present
invention is processed, the recording needle is moved by the pair of transducers according to the
recording signal of the second frequency band of the first frequency band and the screen band.
Because it has a shank in the history, it can be used by attaching it to a conventional stereo caddy
head, and it can be used in the same manner as when playing a record master disc-audio
frequency band with high speed and rotating at speed It is possible to cut and record multiplexed
signals including the recorded signal of the signal on the original record disk, thus shortening the
cutting time of the signal groove, improving the cutting conditions, and mounting the peripheral
weight of the cutting. One :! l! It has features such as making it unnecessary to use 1 shows a
schematic configuration of one example of a conventional stereo cutting head, FIG. 2 is an
enlarged front view of one embodiment of a cutting head according to the present invention, and
an operation principle of the third Nd main cutting head Fig. 4 is a view showing a film attached
to a cutting head all stereo-katch ink head which becomes a wood light gate in Fig. 4. Toss-gloing
force head 11, 11 ... Kutch ink head, 12 ... holder, j 5a, 13b, bifurcated arm, 14a, tab swing tA
child, 15 "fitting, 16--recording needle, 17-acetate Master, 2 o · · shank part. 峙 出 細 HH Victor
Co., Ltd. Figure 16 Figure 2 Figure 3 8 ° Figure 4 EndPage: 46, other than the above inventor
EndPage: 5