JP2872501B2 - Seismic device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic device to be installed on various instruments and devices such as gas meters, oil heaters, elevators, chemical plants, railways, etc. for the purpose of detecting seismic motion and preventing various disasters. About.

[0002]

2. Description of the Related Art Conventionally, as this kind of seismic device, a device using a seismic ball in a seismic mechanism, as shown in, for example, Japanese Utility Model Application Laid-Open No. 61-48325, has been widely used.

In such a conventional seismic sensor, a seismic ball is housed in a casing whose inner bottom surface is formed in a gentle concave spherical shape, and the upper surface of the seismic ball has a lower surface than the spherical ball. A plunger having a disk-shaped portion formed on a concave spherical surface having a large radius is disposed to be vertically movable with the concave spherical surface in contact with the seismic sphere. An opening / closing switch, which is provided with a shaft protruding from the center of the upper end of the plunger, is inserted into a shaft hole of a lid covered at an upper portion of the casing, and is opened / closed in conjunction with the vertical movement of the shaft. Are elastically contacted in a downwardly biased state.

[0004] When the seismic ball rolls in the casing with the vibration, the ball pushes up the concave spherical surface of the plunger, whereby the upper end shaft of the plunger moves the operating lever. It is operated to push up and close the contact of the open / close switch.

[0005] However, in this type of conventional seismic device, as described above, the plunger is disposed in constant contact with the seismic sphere, and the upper end shaft of the plunger is covered by the upper part of the casing. The plunger is inserted through the shaft hole of the cover and the plunger is constantly pressed.To ensure that the open / close switch is activated during vibration, the friction force between the plunger and the seismic ball and the plunger Frictional force between the shaft and the shaft hole through which the shaft is inserted, the plunger gravity,
The plunger must be moved up and down to overcome the bias of the open / close switch. Therefore, it is necessary to employ a large-sized seismic ball, which causes a problem that the seismic device itself becomes large.

In order to solve such a problem, the applicant of the present application has proposed in the earlier application that a pair of upper and lower corresponding electrode pieces having a plurality of contact pieces extending radially so as to be at equal intervals as an open / close switch. In addition to adopting, between each radial contact piece of the lower electrode piece and the seismic ball, the radial contact piece of the lower electrode piece is brought into contact with the ball when the seismic ball rolls and corresponds to the upper electrode piece. (Japanese Patent Laid-Open Publication No. 4-52522) has proposed a seismic device in which a small ball for operating a contact piece that is operated to be pushed up so as to come into contact with a radial contact piece is proposed.

[0007]

In the above proposal,
Even if a smaller seismic ball is used than the conventional one, the vibration can be detected reliably and the whole device can be downsized, providing a small and high-performance seismic device. Make it possible.

However, on the other hand, it has the following problems.

That is, if the size of the device itself is reduced, the on / off switch itself must necessarily be reduced in size. In addition, as described above, both the upper and lower electrode pieces have a complicated shape having radial contact pieces. In addition, strict flatness is required for both electrode pieces because it is necessary to set the intervals between the corresponding contact pieces of both the upper and lower electrode pieces to be equal. In addition, since it is necessary to detect the rolling of the seismic sphere in any direction in exactly the same way, it is required that all the contact pieces of the upper and lower electrodes be uniform in mechanical and electrical characteristics. Is done. Therefore, when manufacturing the open / close switch, extremely advanced production technology is required.

On the other hand, when assembling the open / close switch into the casing, the upper and lower electrode pieces are fixed between the central portions thereof by press-fit pins via insulating spacers, and the corresponding upper and lower radial contact pieces are joined. It must be set so as to be in a predetermined separated state. However, since the electrode piece itself is made of an extremely thin plate-like material when fixed to the casing, deformation and distortion are likely to occur, and there is a possibility that the vibration detection may have a directivity.

[0011] As described above, the proposals of the applicant of the present application have advanced techniques, particularly in the production and assembly of the electrode pieces, and have the difficulty of increasing the cost. Met.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and does not require any advanced technology in manufacturing and assembling, and has an electrode piece having excellent mechanical and electrical characteristics. The purpose is to provide a high-performance and high-sensitivity compact seismic device.

[0013]

The seismic device according to the present invention employs a single contact type open / close switch which is operated in accordance with the rolling of the seismic sphere, and operates the electrode piece. The opening and closing operation is performed by a single contact regardless of the position.

That is, according to the present invention, a seismic sphere is rollably housed in a casing, and is disposed above the seismic sphere with a predetermined phase difference. a plurality of vibration transmission member which is vertically operated is provided, and the seismic devices pair of upper and lower electrode pieces to be opened and closed is disposed in association with the vertical movement to the upper portion of the transmission member, wherein
In both upper and lower electrode pieces, the extending pieces extend outward.
One or more successively mounted outer rings for fixation
The reduced diameter rings are arranged concentrically and
Adjacent rings can bend freely via connecting pieces
Inside the innermost ring
It is composed of a thin plate-shaped integrally molded product with an electrode
The seismic device is characterized in that the upper and lower electrode pieces are opened and closed by a single contact regardless of the pushing position of the electrode pieces by the transmission member. It is assumed that.

In order to surely transmit the vibration of the seismic sphere to the electrode piece, it is preferable to use a small ball as the vibration transmitting member and dispose the small ball above and above the seismic sphere.

[0016]

When the seismic ball rolls in the casing with the vibration, the vibration transmitting member at the corresponding position is moved up and down with the rolling. One of the electrode pieces is moved up and down with the vertical movement of the transmission member, and the electrode piece and the other electrode piece are opened and closed accordingly. The opening and closing operations of these two electrode pieces are performed at a single contact regardless of the push-up operation position by the transmission member.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a vibration sensing device according to the present invention.

As shown in FIGS. 1 and 2, the seismic device according to this embodiment has a seismic ball (1) housed inside and an open / close switch (2) provided at the top. The outer casing (4) in a self-alignable manner in which the casing (3) always has its axial direction coincident with the vertical direction.
Is suspended in a swing-restricted state.

The inner casing (3) is designed to have a low center of gravity so that self-alignment is easily performed against a damper using a high-viscosity fluid described later. That is, the bottom wall (3b) is set to be thicker than the peripheral wall (3a). For the same purpose, a weight may be attached to the bottom of the casing (3) to lower the center of gravity.

A recess (5) is formed at the center of the inner surface of the bottom wall of the inner casing (3) and has a diameter of about 11.1.
A 1-mm seismic ball (1) is normally stored while being held on the recessed portion (7), and at the upper inside of the casing (3) with the rolling of the seismic ball (1). An open / close switch (2) that is opened / closed is provided.

In order to accurately detect the seismic motion, the seismic sphere (1) is surely moved in the casing (3) according to the seismic motion.
It is required that the linear reciprocating motion be performed accurately.

In this embodiment, in order to realize such a reliable and accurate linear reciprocating motion, a concave portion (7) having a special structure is formed at the center of the inner surface of the bottom wall (3b) of the casing (3). doing. That is, as shown in FIGS. 3 and 4, a concave portion (5a) is formed at the center of the inner surface of the bottom wall (3b) of the casing (3), and an adjacent member from the concave portion (5a) is approximately A total of twelve ridges (5b) having a triangular cross-section with an apex angle of about 140 degrees are formed radially so as to form an angle of 30 degrees.

The diameter of the recess (5a) may be appropriately set according to the vibration to be detected. Also each ridge (5b)
Are each set to have a gentle upward slope toward the outside. This inclination angle is desirably about 4 to 6 degrees or less.

By forming such radial ridges (5b), the rolling direction of the seismic ball (1) can be changed to the ridges (5b).
And movement in the casing circumferential direction can be prevented. Therefore, the seismic sphere (1) performs an accurate linear reciprocating motion at the time of the earthquake motion, and more accurate vibration detection can be performed. Further, since each of the ridges (5b) is formed in a triangular cross section, the seismic sphere (1) is maintained in a point contact state with little friction with each of the ridges (5b). Therefore, it is possible to employ a seismic ball (1) smaller than the conventional one.

As described above, the radial ridges (5b)
Acts so as to be able to effectively prevent the seismic ball (1) from moving circularly during an earthquake motion. However, when a large impact force is applied from the outside or the like, the seismic sphere (1) rises from the casing bottom wall (3b) and rises from the casing peripheral wall (3).
a) A circular motion may occur along the inner surface. In such a case, the radial ridges (5b) no longer function effectively. The circular motion of the seismic sphere (1) in the raised state is harmful to the detection of the seismic motion because the switch (2) is maintained in the closed state, and the circular motion must be attenuated as quickly as possible. No.

For this reason, in this embodiment, FIGS.
As shown in (1), a total of six detent ridges (6) having triangular cross sections parallel to each other in the vertical direction are formed at predetermined intervals on the inner surface of the casing peripheral wall (3a). In order to prevent the seismic sphere (1) from circularly moving along the inner surface of the casing peripheral wall (3a) when the seismic sphere (1) is lifted, the ridge (6) has at least the raised seismic sphere (1). Is desirably set at a height position where the contact can be made.

In this embodiment, the seismic sphere (1), which is seated at the center of the bottom wall of the casing (3b), is slightly below the height of the center of gravity of the seismic sphere (1) and is slightly above the height of the center of gravity of the same. It is set to the length to the position. Therefore, the convex streak (6) suppresses the circular motion of the seismic ball (1) not only in contact with the inner surface of the casing bottom wall (3b) but also in a state of floating from the bottom wall (3ba). ing.

The ridges (6) are set at an interval and a degree of protrusion such that the seismic sphere (1) does not contact the casing peripheral wall (3a) between them. That is, as shown by a dashed line in FIG.
The relationship that does not abut on the casing peripheral wall (3a) between the ridges is satisfied even in the state of contact with (6). By satisfying this relationship, the inconvenience of promoting the circular motion due to inertia can be avoided because the seismic sphere (1) does not contact the casing peripheral wall (3a). However, if the interval between the ridges is too small, the circular motion damping effect is inferior, and if the degree of protrusion of the ridges (6) is too large, the rolling of the seismic sphere is hindered. Therefore, it is desirable to set the gap between the seismic sphere (1) and the casing close to the casing peripheral wall (3a) to be about 0, 1 mm, or slightly wider than that.

As in this embodiment, when the seismic ball (1) rolls in contact with the casing bottom wall (3b) and comes into contact with the lower part of the ridge (6), the seismic sphere (1) In order to secure a large gap for the rolling of the ball (1) and not to disturb the linear reciprocating motion of the seismic ball (1), the ridge (6) is attached to the casing bottom wall (3b). It is desirable to provide it on the extension of the radial ridges (5b) formed on the substrate.

As shown in FIG. 2, on the inner upper part of the inner casing (3), a small ball receiving plate for operating an electrode piece whose lower surface is formed as a concave spherical surface having a slightly larger radius of curvature than the seismic sphere (1). (7) is fitted to the seismic ball (1) so as to be close to and away from the ball.

As shown in FIGS. 1 and 2, the receiver (7) has a total of four holes (7a) at equal distances from the center thereof at equal intervals along the circumferential direction. These holes (7a) are formed in a penetrating state, as shown in FIG.
A small ball (8) for operating an electrode piece made of steel or the like having a diameter of about 2 mm is fitted therein. In this fitted state, each of the small balls (8) is locked and held by the reduced diameter portion (7b) at the lower end while slightly protruding below the lower end opening of each hole (7a), and is movable vertically. I have.

The upper surface side of the electrode ball actuating small ball receiver (7) is formed flat, and in particular, as shown in FIG.
The small balls (8) slightly protrude from the upper surface.

As shown in FIGS. 2 and 8, a pair of upper and lower electrode pieces (10) and (11) are provided on the upper portion of the small ball receiver (7).
An open / close switch (2) is provided.

As shown in FIGS. 7A and 8, the lower electrode piece (10) has a triple ring structure in which the whole is formed flat. That is, in the fixing outer ring (10b) in which the extending piece (10a) extends outward, the intermediate ring (10c) is in the same phase as the extending piece (10a) and the first connecting piece ( 10d), it is arranged in a cantilever state that can be freely bent. In the intermediate ring (10c), the inner ring (10e) is cantilevered via the second connecting piece (10f) at a position 180 degrees out of phase with the first connecting piece (10d). It is arranged in. Further, a disc-shaped electrode (10g) is provided at the center of the inner ring (10e) with the second connecting piece (10f).
It is arranged in a cantilever state where it can bend and bend via the third connecting piece (10h) at positions having different degrees of phase. As shown in FIG. 8, the inner ring (10e) is set slightly wide above the corresponding hole (7a) of the small ball receiver (7), and is pushed up by the small ball (8). Is to be activated.

On the other hand, the upper electrode piece (11)
As shown in FIG. 8C and FIG. 8, the entirety has a double ring structure formed flat. That is, an inner ring having substantially the same size as an intermediate ring (10c) of the lower electrode piece (10) is provided in an outer ring for fixing (11b) having a lead piece (11a) similarly to the lower electrode piece (10). (11c) is arranged in a cantilever state that is freely bendable via a first connecting piece (11d) at a position in phase with the drawing piece (11a). In the center of the inner ring (11c), a disc-shaped electrode (11g) is connected to the first connecting piece (11d) by 180 °.
It is arranged in a cantilever state where it can bend and bend via the second connecting piece (11f) at positions having different degrees of phase. The disc-shaped electrode (11g) has a single downwardly bulging contact (11i) at its center.

The two electrode pieces (10) and (11) include:
0.05 mm thick from the viewpoint of electrical characteristics (low contact resistance), strength (durability), flexibility (flexibility or sensitivity), etc.
It is preferable to use an ultra-thin sheet made of a Cu—Be alloy having a degree of punching into the above-described shape, performing a gold plating process, and then performing a heat treatment.

As shown in FIGS. 2 and 8, the lower electrode piece (10) and the upper electrode piece (11) are connected to the extraction piece (1).
0a) and (11a) are arranged so as to be 180 degrees out of phase with each other, and the outer ring for fixing (10b) (11
b) Combined close to each other via an insulating ring (12) having substantially the same inner and outer diameters as the ring. Then, in the combined state, the drawer pieces (10a) (11a) are pulled out to the outside through cutouts (3c) (3c) formed at the upper end edge of the inner casing (3), so that the small ball receiver is pulled out. It is arranged on a board (7).

As shown in FIG. 2, a lid (13) is fitted and fixed to the upper end opening of the inner casing (3), and is formed on the outer peripheral edge of the lower surface of the lid (13). An outer ring (10b) for fixing the lower electrode piece (10) and an insulating ring (12) are provided between the lower protruding edge (13a) having a predetermined width and the outer peripheral edge of the upper surface of the small ball receiver (7). ) And the outer ring (11b) for fixing the upper electrode piece (11) are clamped and fixed. In this state, the lower electrode piece (1
The inner ring (10e) of (0) comes into contact with the small balls (8) and urges the small balls (8) downward.

In order to facilitate the positioning of the electrode pieces (10) and (11) and the insulating ring (12), an outer ring (10b) for fixing the electrode pieces (10) and (11) is used. ) (11b) and insulating ring (12)
One or a plurality of positioning holes are formed in the corresponding locations, and upwardly projecting knock pins are formed in the corresponding positions of the small ball receiver (7), and the knock pins are fitted into the holes. You may do it.

The lid (13) covered by the upper opening of the inner casing (3) is provided integrally with a cylindrical portion (13b) having an upper opening at the center of the upper surface. A lid (13c) of a corresponding shape is forcibly fitted to the shape (13a).

The inner casing (3) is provided with a suspension attached downwardly protrudingly to a longitudinally intermediate portion of the inner casing suspending strip (14) whose both ends are locked in the outer casing (4). It is swingably suspended and fixed in the outer casing (4) by the shaft (15).

Here, the seismic sphere (1) and the small balls for each operation (8)
Are very close to each other with an interval of about 0.2 mm, and when the seismic sphere (1) rolls in the inner casing (3), the seismic sphere (1) becomes smaller in the corresponding position. The sphere (8) is contacted and the small sphere (8) is pushed up. Then, the pushed up small ball (8) pushes up the inner ring (10e) of the lower electrode piece (10), and the third connecting piece (10h) is attached to the inner ring (10e) with this pushing up operation.
The disk-shaped electrode (10 g) connected via the ascending operation operates. Thus, the disc-shaped electrode (10) of the lower electrode piece (10) is
When g) rises, the electrode (10g) comes into contact with the disc-shaped electrode (11g) of the upper electrode piece (11) arranged close to and above the upper part, and the open / close switch (2) is closed.

As described above, the corresponding small ball (8) is moved up and down in accordance with the rolling of the seismic ball (1), and the open / close switch (2) is opened and closed accordingly. Regardless of the position where the lower electrode piece (10) is pushed up by (8), the upper electrode piece (11) and the lower electrode piece (1).
0) is opened and closed by a single contact (11i).

When the vibration disappears and the rolling of the sensing ball (1) is completed, the sensing ball (1), the small ball (8) and the lower electrode piece (10) return to their original positions, respectively. This will prepare for the next vibration detection.

The seismic device must have a so-called non-directionality because the characteristics of the open / close switch (2) must not differ depending on the position of the small ball (8) to be operated. For this reason, in the above embodiment, both upper and lower electrode pieces (10) (1) constituting the open / close switch (2) are provided.
As 1), as described above, a plurality of ring-shaped members and electrodes are arranged inside and outside, and they are connected in a flexible cantilever state at positions where the phases are different from each other by 180 degrees, so that directionality is possible. It has been reduced as much as possible.

[0046] In the above embodiment, although the ones employing globules of vibration of KanShindama (1) as vibration transmitting member for transmitting the opening and closing switch (2) (8), the frictional force is variable If the number is as small as possible, for example, a plunger type may be adopted.

The suspension shaft (15) for suspending the inner casing (3) has a spherical bulge-shaped engaging portion (15b) at the lower end of the shaft portion (15a) and a disk-shaped lower end at the lower end. The shaft portion (15a) is loosely fitted into a suspension shaft insertion hole (16) formed in the center of the lid (13c), and the shaft portion (15a) is loosely fitted. The locking portion (15b) is locked to the lower end edge of 16). It is sufficient that at least the upper half of the engaging portion (15b) is formed in a spherical bulge, and the wing portion (18)
c) does not necessarily have to be a disk-shaped one, and any other shape may be employed.

The dimensions of each member in the above embodiment are such that the shaft portion (15a) of the suspension shaft (15) has a diameter of about 0.8 m.
m, the suspension shaft insertion hole (16) for loosely inserting the suspension shaft has a diameter of about 1.
3 mm, the locking portion (15b) locked to the lower edge thereof has a radius of about 0.75mm, and the inner diameter of the cylindrical portion (13b) is about 6.3m.
m, the wings (15c) arranged facing the inside thereof are each set to a diameter of about 6 mm.

In this suspended state, the vibration of the outer casing (4) is transmitted to the inner casing (3), and the inner casing (3) is prevented from swinging due to inertial force. ) And a lid (13c) covered by the upper end opening thereof is filled with a highly viscous fluid (X).

As the high-viscosity fluid (X), the inner casing (3) can always keep its axial direction along the vertical direction, and can efficiently transmit vibration to the inner casing (3). Satisfying various conditions such that the performance does not deteriorate over a long period of time and there is no danger of oil leakage, for example, silicon having a viscosity of about 10,000 to 30,000 (cP).
Oil (Shin-Etsu Chemical Co., Ltd., trade name "KF-96
H ") are preferably used. If necessary, a swing restricting member such as a conical spring, which does not hinder the centering action, and a bellows for preventing viscous fluid from flowing out are interposed between the band plate (14) and the lid (13c). You may make it do.

In the above embodiment, the inner casing containing the seismic ball is swingably suspended in the outer casing. However, the present invention is not limited to this type. Also, the swing regulation of the inner casing containing the seismic ball is not limited to the above embodiment.For example, an outer casing is arranged outside the inner casing, and a high-viscosity fluid is applied to the bottom between the two casings. It may be filled.

On the other hand, as shown in FIGS. 1 and 2, the outer casing (4) has the inner casing (3) inside.
The upper casing half (20) and the lower casing half (2)
1).

The lower casing half (21) is integrally provided with bulges (21a) (21a) (21a) (21a) extending in the axial direction at four positions on the outer peripheral surface thereof with a phase difference of 90 degrees. ing.

A pair of opposing bulges (21a) (21)
At each lower end of (a), an insertion fixing leg (21b) to the printed circuit board on the mounting side is integrally extended. Conductive terminal rods (22) and (22) are press-fitted into the other pair of bulging portions (21a) and (21a) in a buried state, respectively, and are fitted inside the upper ends of the terminal rods (22) and (22). The pull-out pieces (10a) and (11a) of the open / close switch (2) drawn out of the casing (3) are connected by riveting or soldering, respectively, and have inverted L-shaped terminal plates (23) and (23) at their lower ends. Are fixed in a protruding downward manner, so that the components can be directly mounted on the mounting-side printed circuit board without lead wires.

As a result, the soldering operation for joining the lead wires as in the conventional product can be omitted, thereby reducing the manufacturing cost and the electrical resistance at the connection point.

It should be noted that the present invention is not limited to the seismic device for a gas meter as shown in the above embodiment, but is used for detecting vibration in various devices and devices such as an oil stove, an elevator, a chemical plant, and a railway. It can also be applied to seismic devices.

[0057]

As described above, in the seismic device according to the present invention, the seismic sphere is rollably stored in the casing, and is disposed above the seismic sphere with a predetermined phase difference. A plurality of vibration transmitting members which are operated up and down in accordance with the rolling of the seismic ball are provided, and a pair of upper and lower electrode pieces which are opened and closed in accordance with the up and down movement are provided above these transmitting members. It is a thing. Therefore, vibration can be reliably detected without using a large-sized seismic sphere unlike a conventional product having an open / close switch operated by a plunger disposed above the seismic sphere. Can be reduced in size. Moreover, since the upper and lower electrode pieces are configured to be opened and closed by a single contact regardless of the push-up operation position of the electrode pieces by the transmission member, a large number of radially extending pieces are provided. As in the case of a multi-contact system having a pair of upper and lower electrode pieces having a contact piece, there is no variation in contact performance due to the flatness of the electrode piece and the mechanical and electrical characteristics of each contact piece. Therefore, the contact characteristics can be stabilized, and the vibration sensing characteristics can be improved. Further, compared to the case where an electrode having a radial contact piece having a complicated structure is employed, it is possible to employ an electrode having a simple structure, and thus it is possible to easily manufacture and assemble.

Also, as the upper and lower electrode pieces, one or a plurality of sequentially reduced rings are concentrically arranged in a fixing outer ring in which lead-out pieces are extended outwardly. consist adjacent rings etc. dumb to is connected to flex freely cantilever fashion via a connecting piece to each other, thin plate-shaped molded article which is the electrode in the central portion of the ring located on the innermost becomes disposed by employing those formed by, it exhibits the following effects.

That is, the work of assembling the electrode pieces to the casing is performed by arranging the electrode pieces in a predetermined distance by interposing an insulating ring between the fixing outer rings of the two electrode pieces, and in this state, fixing the upper and lower fixing outer rings. Can be completed simply by clamping and fixing between the casing and the lid thereof, so that the work of assembling the electrode pieces to the casing can be performed easily and in a short time.

In addition, since both electrode pieces can be fixed by clamping the outer ring, the fixing work may cause distortion or loss of parallelism in both electrode pieces. There is no. Therefore, the desired mechanical and electrical characteristics can be reliably maintained, and the characteristics of each product due to the assembling work can be prevented from being varied.

According to the second aspect of the present invention, by using a small ball arranged close to and above the seismic sphere as the vibration transmitting member, the frictional resistance between the small ball and the seismic sphere can be reduced. Since it is possible to greatly reduce the size, it is possible to employ a still smaller seismic sphere, which not only contributes to the downsizing of this type of device, but also improves the performance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing components of a seismic device in an exploded state.

FIG. 2 is a longitudinal sectional view of the seismic device.

FIG. 3 is a plan view of an inner casing.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a plan view of a small ball receiver for operating an electrode piece.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIGS. 7A, 7B, and 7C are plan views of a lower electrode piece, an insulating ring, and an upper electrode piece, respectively.

FIG. 8 is an enlarged sectional view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sensing ball 2 ... Opening / closing switch 3 ... Casing 8 ... Vibration transmission member (small ball for electrode piece actuation) 10 ... Electrode piece (lower side) 10a ... Pullout piece 10b ... Outer ring for fixing 10c ... Ring (middle) 10d ... connecting piece 10e ... ring (inside) 10f ... connecting piece 10g ... electrode 10h ... connecting piece 11 ... electrode piece (upper) 11a ... drawer piece 11b ... fixing outer ring 11c ... ring (inside) 11d ... connecting piece 11f ... connecting Piece 11g ... Electrode 11h ... Connecting piece 11i ... Contact

Claims (2)

(57) [Claims] 1. A seismic ball (1) is rotatably stored in a casing (3), and is disposed above the seismic ball (1) with a predetermined phase difference. A plurality of vibrating transmission members (8) which are operated up and down in accordance with the rolling of (1) are provided, and a pair of upper and lower electrode pieces which are opened and closed in accordance with the up and down movement of the transmitting members (8). (10) (1
In the seismic device provided with 1) , both the upper and lower electrode pieces (10) and (11)
The drawer pieces (10a) (11a) extend toward the
In the outer ring (10b) (11b), one or more
Several sequentially reduced rings (10c) (10e) (1
1c) are arranged concentrically and their adjacent
(10b) (10c) (10e) (11b) (11
c) Dowels are connected to each other (10d) (10f) (11
d) is connected to the cantilever state which is flexible and
Electrode at the center of the ring (10e) (11c)
(10g) (11g) is disposed in the form of a thin plate.
The upper and lower electrode pieces (10) and (11) are formed of a shaped article , regardless of the position of the push-up operation of the electrode piece (10) by the transmission member (8).
A seismic device characterized by being opened and closed by a single contact (11i). 2. The vibration transmitting member (8) is provided on the seismic ball (1).
2. The small ball according to claim 1, wherein the small ball is arranged close to and above the upper surface.
The described seismic device.