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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 show an acceleration microphone for
heart sound according to the present invention, FIG. 1 shows an internal configuration by cutting
an outer casing, and FIG. 2 shows FIG. It is a top view which removes a top cover and shows the
holding structure of a weight. FIG. 3 is an explanatory view showing an internal configuration of
a conventional acceleration microphone filled with oil. Movable piece to convey the full
displacement in the piezoelectric element, 4 ...... weight, 5,5 ...... weight center Wei support plate 6
...... oil blocking plate, a, b, c ······ Oil filling space, 7 · · · · · · · · · · · · · · Plastic material. C / t
correction, 3 (C-201-
[Detailed description of the invention] This invention is an acceleration for heart sound detection!
Heart sound acceleration that improves the holding method and braking method of Ikran Hon O
weight 9! Ik Bong Hong Kll to do. Usually, there are three kinds of heart sound mita tai hon OwN
conversion system, displacement type, speed type and acceleration type, but they are related to
acceleration 1 [Kll] of the present invention. Acceleration type! In the case of a microphone, the
vibration is transmitted to the entire microphone four phones O jacket. There is a # 1 elastic
piezoelectric element and a vibrating system inside the Miter 1 phone, and when a vibration is
seen by a microphone and an external speaker, it is between the outer skin and the internal
vibrating system El: Streak (The negative position is converted into electrical vibration by a
piezoelectric element. Fig. WJK will be described with reference to the J1 ma conventional heart
sound acceleration microphone four-phone configuration, which is fixed to an outer protrusion of
a pair of diagonal diagonal lines of a square piezoelectric element, The other pair of diagonal
points of the piezoelectric element are joined together by three movable pieces. The vibration
system is constituted by a piezoelectric element 1 having elasticity and a weight gauze. In the
figure, 2.2 is a center point support plate of mold movement and has upper and lower flexibility.
≦ is an oil seal plate, and a space indicated by 1 ° b, o is filled with braking oil. As described
above, it is necessary to have a vibration system inside the 1 acceleration / deformed microphone
y phone company as understood as follows, and at the same time it is necessary to damp the
transient vibration of the local vibration of 1 vibration system and its surrounding. It is. In the
microphone 4 phone of the present invention, as shown in FIG. 1 and FIG. 2 [K, a plastic material
7 sharing elasticity and viscosity, such as Siri ()! Congum is used. The weight # is held with a
plurality of flexible materials 7 arranged at an equal interval at the center of the external
company iJ. : The size of the Myta field phone is limited in size, and small iIOs have a capacity of
1IhN, and the conventional oil-filled O mitafield phone has a narrow-fluid weight in the oil
chamber. There is a disadvantage in that the suitable shape can not be selected, and the damping
property is also complicated, the structure is also am, the workability is poor, and oil leakage
occurs. However, as in the case of the present invention described above, when a plastic material
such as silicone rubber that shares elasticity and viscosity is used to hold a single weight and is
held at the center of the outside of the tube by weight, oil sealing, weight 90 centers The point
mounting support plate, oil cutting plate, etc. are unnecessary, the construction can be greatly
simplified, the workability can be improved, and the vibration system can also exhibit a
theoretical form, and the characteristics of the miter telephone can be improved. It is also O that
has a great effect such as self-sizing itself and also making frequency characteristics flat by itself.
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