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DESCRIPTION JPS50117401

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DESCRIPTION JPS50117401
1, the title of the invention
Recording detector and method of manufacturing the same
3. Detailed Description of the Invention The present invention comprises an electromechanical
pressure transducer such as a piezoelectric element and a detector, the detector being attached
to the electromechanical pressure transducer, the electromechanical pressure transducer
Attenuator for supporting the device and, for example, a tubular support fixed to the attenuator
and for supporting the detector are optionally provided, and the information of the video signal is
recorded, for example, as a relief of the molded part of the record carrier, Furthermore, the
present invention relates to a recording detector and a method of manufacturing the same, which
is used for a record carrier with high recording density. The forearm type recording detector is
used to detect and convert a color image signal recorded in a so-called digital format with audio
information into an electrical signal. This electrical signal is re-starred by a conventional
television receiver. In the case of pressure detection, the deflection of the detection portion of the
detector in contact with the relief on the surface of the record carrier is much more than the size
of the pressing force in the forming portion of the relief on the surface of the record carrier.
Small size. In this case, the ability to shake, Page ?, иии EndPage: 1 has a part 0 elastic hardness of
the detector extremely, and the characteristic resonance frequency reaches up to 4 to 5 MH 3 in
the signal frequency range? There is a BQf on the upper side. However, as a result of testing the
detector over a long period of time, it has been found that the vibration characteristic is impaired
even though the main resonance frequency is above the signal frequency and the region. The
basic problem of the present invention is to eliminate the disturbance of the vibration
characteristic of the present invention. According to the present invention, this problem is solved
as follows. That is, at least the junction between the detector and the electromechanical pressure
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transducer on the surface of the detector was coated, and the sealing injection compound
exhibiting a viscosity of 5 cP to 5 Q cP in the liquid phase was cured to form the coating. It is It is
effective to use a sealing injection compound having a viscosity of 20 cP-50 cP under the liquid
phase. According to an embodiment of the present invention, an electromechanical pressure
transducer (a five unit consisting of m parts of connection lines of the electromechanical
pressure transducer is coated, except for the detection portion of the detector). This coating is
formed from a sealing injection compound, but the sealing injection compound still used for the
formation of the coating acts so that, after curing, the adjoining parts are fixedly connected to
each other. It is desirable to select the hardness of the sealing injection compound after curing on
the hardness of the adhesive so that the adjoining parts are securely fixedly connected to each
other. Furthermore, the recording detector of the present invention is manufactured as follows: in
the liquid phase, it has a viscosity of 5cP-5'QcP and in the gap remaining at the junction between
the detector and the electromechanical pressure transducer. A sealing injection compound
having infiltrating characteristics is used to wet and wet the junction of at least the detector and
the electromechanical pressure, transformation and conversion element on the surface of the
detector, and then harden the sealing injection compound. .
According to the present invention, since no overshoot occurs in the vibration of the chassis
structure, flat frequency characteristics are obtained. For example, high frequency overshoots are
significantly attenuated during pulse regeneration. In addition, obstacles in sound reproduction
are also avoided. ? The present invention further improves the coupling-connection between the
individual components. For example, the connection lines of the electro-mechanical pressure
transducer element are not short circuited at the covering portion. In addition, sensitive parts can
be well protected from external action (tension, suppression, low temperature, moisture, etc.).
Furthermore, the main resonance frequency of the electromechanical conversion system
(including the mass attached to the electromechanical conversion system) can be raised. For
example, if the main resonance frequency is about 5 MH7 fx, it can be raised by 200 KHz-7-500
KHz. In addition, the amount of waste generated by manufacturing is small. Also, the detector of
the present invention is cheap and inexpensive. If the detector is to be provided with a coating,
the assembled detector may be immersed in a sealing inlet, or it may be soaked in a land, or
sprayed with a sealing inlet, or any other suitable measure. Apply f. The reason for the increase
of the main resonance frequency is as follows. The adhesive or bonding agent to be attached
does not exhibit sufficient elasticity between the detector and the electrode. Even if the detector
is fixed to the electromechanical pressure transducer, a gap remains partially at the junction of
the two. The liquid phase sealing compound then penetrates into these gaps by capillary action.
If the sealing compound cures, the elastic hardness of the joint between the detector and the
electromechanical pressure transducer increases. It has been found to be effective to use a
sealing injection compound having a viscosity of 20 to 50 'cP under liquid phase (where P is
poise and cP is a unit of viscosity). It has also been found to be advantageous to use a sealing
injection compound which has the property of contracting on curing. As sealing compound for
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injection, for example, an adhesive available under the name "Sicomate 85" is used. [-7 = Me) 85J is a rapid polymerization cold-setting non-solvent-component adhesive. The viscosity is tIi 20
cP, and the main component is cyan EndPage: 2 bits IJ, rate. As a maker of "Sicomate 85" in
which some amount of film forming agent and stabilizer is added to "Sicomate 85", for example,
Bischier Berge-Geselschaft, Mitto-Bechrenktel-Haftsung, 71 Noper is known. When bonding the
detector element 4 to the electro-mechanical pressure conversion element, the adhesive used as a
sealing injection compound is used in advance to reduce the use size Lt ? by ?.
This type of adhesive cures quickly. The adhesive used for the initial bonding cures more slowly
than the adhesive used as the sealing compound. The invention will now be described in detail by
way of example with reference to the drawings. FIG. 1 shows a part of the cross section of the
embodiment of the recording detector of the present invention cut along the cutting line yy of
FIG. FIG. 2 shows a cross section of the embodiment of FIG. 1 cut by the cutting @ x-x of FIG. In
the detector of FIGS. 1 and 2, the video disk pressure transducer 1 is provided with a
parallelepiped piezoelectric ceramic. The contact surface 8 is connected via 1 1 J 2 to an
amplifier not shown. A detector 3 is fixedly attached to the electro-mechanical pressure
transducer 1 (the detector 3 is, for example, an electro-mechanical pressure detector) [rrr solid ffl ff. Abrasion resistant material such as i "-1-3'ff,[email protected], etc. The detector 9 of the
detector 3 slides along the recording track of the record carrier. The electromechanical pressure
transducer element 1 is fixed to the attenuator 4 by the adhesive 7 on the opposite side of the
detector 3. The attenuator 4 is made of a material (such as plasticis) exhibiting a large internal
attenuation at room temperature. As materials of the attenuator 4, E, J, Dupont 5 Danemour and
Campani (INC). ??????????????????? Suitable for Fluo Elastomer, made in
the United States 2, (available under the name "Vitton" in the Federal Republic of Germany). The
damping rod is fixed to the flat pressed part of the support tube 5. The support tube 5 holds the
detector in the detection position. According to an embodiment of the present invention, the
detector is coated with a substantially entire surface 6. That is, a unit consisting of a part of the
electromechanical pressure transducer 1 (a part of the connection line 2 of the electromechanical
pressure transducer l and the detector 3, the attenuator 4 and the support tube 5 is 11 I was
covered! 6 coated. However, the detection unit 9 Fi of the detector 3 is not covered. When the
sealing injection compound forming the coating 6 hardens, the parts covered by the coating 6
are fixedly connected to one another, so that mechanical resonances in the signal frequency
range are attenuated. According to another embodiment of the present invention, the liquid
phase is below the liquid phase with respect to the test pieces 3 and 1, the electromechanical
pressure transducer 1 and the adhesive bonding the detector 3 and the electromechanical
pressure transducer. In the sealing injection compound (the resin coating 6 is formed and the
coating is applied, the sealing injection compound z is formed at the junction between the
sensing element 3 and the electromechanical pressure transducer 1). The remaining gap is
infiltrated by capillary action.
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4. Brief description of the drawings FIG. 1 is a schematic view showing a part of the detector of
the present invention cut away, and FIG. 2 is a cross-sectional view taken along the line X-X of
the detector of FIG. It is. DESCRIPTION OF SYMBOLS 1 ... electromechanical pressure conversion
element, 2 ... wire, 3 ... detector, 4 ... attenuator, 5 ... support pipe, (sigma) * coating. Attorney
Attorney Roland Sonder Hof (, 1 other)-EndPage: 3 (1) 1 statement G? ) Drawing, 1. ; 0) One
power of attorney,-"7, Inventors other than the above, patent applicant or agent EndPage: ?
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