JP2000146575A - Motion sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motion sensor which can detect vibration with simple constitution and has excellent durability. SOLUTION: A motion sensor 1 is equipped with a ball 40 whose surface has conductivity, a substrate 10 formed in a disk type, a positive electrode surface 28 and a negative electrode surface 38 which are alternately arranged on the same plane, maintaining a gap on the substrate 10, mount the ball 40 on the upper side, and move the ball 40 freely from one to the other across the gap G, and a cover 50 preventing the ball 40 from flying outward. When vibrating is generated, the ball 40 rolls and slides on the surface connecting the positive electrode surface 28 with the negative electrode surface 38. When the ball 40 reaches a part just above the gap G, the electrode surfaces 28 and 38 make electric continuity. When the ball 40 comes off from the gap G, the electrodes surfaces 28 and 38 are electrically separated from each other. Thereby an intermittent signal as a detection signal of vibration generation can be outputted from an output terminal to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a motion sensor,
In particular, the present invention relates to a motion sensor that can detect the occurrence of vibration, earthquake, tilt, and the like with a simple configuration.

[0002]

2. Description of the Related Art In a security system for preventing objects from being stolen from a vehicle, when a vibration sensor detects that a vibration has occurred in a vehicle, an alarm is issued to exterminate the thief,
The driver is notified wirelessly.
In a danger zone of an earthquake in mountains, when an earthquake sensor detects that an earthquake has occurred, a warning is issued to call attention. A sensor that detects the occurrence of such vibration or earthquake supports a heavy object in a case by a spring or the like so as to be relatively movable, and fixes the case to a vehicle or the ground. When a vibration or an earthquake occurs, a heavy object has a property of being kept stationary by inertia, and the occurrence of the vibration or the earthquake is detected by electrically detecting a relative movement with respect to the case.

[0003]

However, in the conventional sensor described above, when a large vibration or earthquake occurs many times, the mechanism for supporting a heavy object with a spring or the like in the case is broken, and the vibration or the earthquake is damaged. There has been a problem that it is not possible to detect the occurrence of the problem. An object of the present invention is to provide a highly durable motion sensor capable of detecting one or more types of motion such as vibration, earthquake, and inclination with a simple configuration in view of the above-described problems of the related art. I do.

[0004]

In the motion sensor according to the first aspect of the present invention, balls having a conductive surface are alternately juxtaposed with a gap therebetween, and the balls are placed on the upper side. And a positive electrode surface and a negative electrode surface that can move from one side to the other side. As a result, when motion such as vibration, earthquake, or tilt occurs, and the ball having a conductive surface rolls or slips on the surface connecting the + electrode surface and the − electrode surface,
When the ball just comes over the gap, the positive and negative electrode surfaces conduct, and when the ball leaves the gap, the positive and negative electrode surfaces become non-conductive. It is possible to extract an intermittent signal as an occurrence detection signal. No special structure for supporting the ball is required, and high durability is obtained because of the simple configuration. In the motion sensor according to the second aspect of the present invention, a ball having a conductive surface is alternately juxtaposed with a gap therebetween, and the ball is placed on the upper side, and is movable from one side to the other across the gap. And a concave portion provided on a surface connecting the + electrode surface and the −electrode surface, wherein the ball can freely enter and exit. With this, if you wait in advance with the ball in the recess,
Vibration or an earthquake having a strength such that the ball comes out of the recess occurs, or an inclination of an angle occurs such that the ball comes out of the recess, and the ball having a conductive surface forms a positive electrode surface and a negative electrode surface. When the ball rolls or slips on the connecting surface, the + electrode surface and the-electrode surface conduct when the ball just comes over the gap, and when the ball comes off the gap, the + electrode surface and the-electrode surface become non-conductive. In addition, it is possible to take out an intermittent signal as a detection signal of occurrence of motion such as vibration outside. No special structure for supporting the ball is required, and high durability is obtained because of the simple configuration. In the motion sensor according to the third aspect of the present invention, balls having conductive surfaces are alternately juxtaposed with a gap therebetween, and the balls are placed on the upper side, and are movable from one side to the other over the gap. And a surface connecting the + electrode surface and the − electrode surface is formed in a mortar shape opened upward. As a result, in normal times, the ball is stationary at the bottom of the surface connecting the + electrode surface and the − electrode surface, and vibration or an earthquake having a strength such that the ball rises over a mortar-shaped slope is generated, Or an inclination occurs such that the mortar-shaped slope is less than horizontal,
When the ball whose surface is conductive rolls or slides on the surface connecting the + electrode surface and the − electrode surface, when the ball just comes over the gap, the + electrode surface and the − electrode surface conduct, When the gap is removed from the gap, the positive electrode surface and the negative electrode surface become non-conductive, and it becomes possible to take out an intermittent signal as a detection signal of the occurrence of motion such as vibration. No special structure for supporting the ball is required, and high durability is obtained because of the simple configuration. In the motion sensor according to the fourth aspect of the present invention, balls having conductive surfaces are alternately juxtaposed with a gap therebetween, and the balls are placed on the upper side, and are movable from one side to the other over the gap. And a surface connecting the + electrode surface and the − electrode surface is formed in a valley shape opened upward. As a result, in normal times, the ball is stationary at the bottom of the valley-like surface connecting the + electrode surface and the − electrode surface, and vibration or an earthquake having such a strength that the ball rises over the valley-like slope is generated. Or the inclination of the angle such that the valley-shaped slope becomes horizontal or less occurs, and when the ball having a conductive surface rolls or slips on the surface connecting the + electrode surface and the − electrode surface, When the ball just comes over the gap, the positive electrode surface and the negative electrode surface conduct, and when the ball comes out of the gap, the positive electrode surface and the negative electrode surface become non-conductive. It is possible to extract the intermittent signal. No special structure for supporting the ball is required, and high durability is obtained because of the simple configuration.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a motion sensor according to the present invention, with a part thereof omitted. FIG.
It is sectional drawing which followed the II 'line. Reference numeral 1 denotes a motion sensor, which is installed on an arbitrary object and can output an intermittent signal as a detection signal to the outside when a vibration, an earthquake, or an inclination occurs. Motion sensor 1
Among them, 10 is a substrate made of an insulating member formed in a disk shape, and 20 and 30 are conductive plates, such as copper, silver, gold, and platinum, of a predetermined thickness mounted on the substrate 1. The positive electrode plate and the negative electrode plate, and the positive electrode plate 20 extends radially from the vicinity of the center to the vicinity of the outer periphery of the substrate 1 in six directions.
26. The -electrode plate 30 is arranged so as to surround the + electrode plate 20 in the same plane with a gap G at a fixed distance, and the electrode blades 31 to 36 extending from six places near the outer periphery of the substrate 1 to near the center. have. Electrode blade 21
26 and the electrode blades 31 to 36 are alternately arranged in the circumferential direction with a gap G interposed therebetween. 27 is a positive electrode plate 2
Reference numeral 37 denotes a + terminal extending from 0 to the outside of the substrate 10, and 37 denotes a − terminal extending from the − electrode plate 30 to the outside of the substrate 10.

Reference numeral 40 denotes a ball having a conductive surface, and +
A positive electrode surface 28 which is the surface of the electrode plate 20;
And rolls or slides on the electrode surface 38 and is movable. The diameter of the ball 40 is much larger than the gap G, and is movable from one of the + electrode surface 28 and the − electrode surface 38 to the other over the gap. When the ball 40 is just above the gap G, the ball 40 comes into contact with both the + electrode surface 28 and the −electrode surface 38 to make the + electrode surface 28 and the −electrode surface 38 conductive. . The ball 40 can be easily formed by making a copper ball as a whole or by plating the surface of a steel ball with gold. Reference numeral 50 denotes a cylindrical cover having an open space so that the balls 40 can move freely therein, and is fixed to the outer peripheral end of the substrate 10.

Next, the operation of the above embodiment will be described. For example, when it is desired to detect the occurrence of vibration of a certain object (not shown), the motion sensor 1 is set horizontally on the object, the + terminal 27 of the motion sensor 1 is connected to + V ₀ ,
The terminal 37 is grounded via the resistor R. -A detection signal is taken out from the output terminal OUT connected to the terminal 37 (see FIG. 1). In normal times when vibration does not occur, the ball 40 is stationary just above the positive electrode surface 28, directly above the negative electrode surface 38, or just above the gap G. If it is directly above the positive electrode surface 28 or directly above the negative electrode surface 38,
Since the electrode surface 28 and the negative electrode surface 38 are in a non-conductive state, the output terminal OUT maintains the ground potential.
, Since the positive electrode surface 28 and the negative electrode surface 38 are in a conductive state, the output terminal OUT maintains the potential of + V ₀ . When the potential of the output terminal OUT does not change, it indicates no vibration.

When vibration is generated in the object and the motion sensor 1 is shaken, the ball 40 in the cover 50 is
Rolling or sliding on the surface connecting the and the electrode surface 38. At this time, when the ball 40 is directly above the positive electrode surface 28 or the negative electrode surface 38, the positive electrode surface 28 and the negative electrode surface 38
Becomes non-conductive, the output terminal OUT falls to the ground potential, and when the ball 40 is directly above the gap G, the positive electrode surface 28 and the negative electrode surface 38 are in a non-conductive state.
T drops to the ground potential, and when the ball 40 is directly above the gap G, the + electrode surface 28 and the − electrode surface 38 are in a conductive state, and the output terminal OUT rises to + V ₀ . Therefore, ball 4
With the movement of 0, an intermittent signal is output from the output terminal OUT as a vibration generation detection signal.

If the object is a building or a mountain, the motion sensor 1 is shaken even when an earthquake occurs, so that the occurrence of the earthquake can be detected by the same operation as that for detecting the vibration. Also, in the case where the target object is an object that may be inclined, the ball 40 rolls internally even when the motion sensor 1 is inclined from a horizontal state, and an intermittent signal as a detection signal of occurrence of the inclination can be output.

According to this embodiment, the motion sensor 1 is set horizontally on an object, and vibration (or earthquake) or inclination occurs, and the ball 40 having a conductive surface. Rolls or slides on the surface connecting the positive electrode surface 28 and the negative electrode surface 38, the ball 40
, When the positive electrode surface 28 and the negative electrode surface 38 conduct,
When deviating from the gap G, the positive electrode surface 28 and the negative electrode surface 38
Becomes non-conductive, and it is possible to take out an intermittent signal as a detection signal of occurrence of vibration (or occurrence of earthquake) or inclination. No special structure for supporting the balls 40 is required, and high durability is obtained because of the simple configuration.

FIG. 3 is a sectional view showing a motion sensor according to a second embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals. The motion sensor 1A shown in FIG. 3 has substantially the same configuration as the motion sensor 1 shown in FIGS. 1 and 2, except that a recess 60 is provided at the center of the substrate 10A so that the ball 40 can freely enter and exit. It is.

Next, the operation of the motion sensor 1A of this embodiment will be described. The motion sensor 1A is set horizontally on an object (not shown) in advance, and the motion sensor 1A is set in a state where the ball 40 is fitted in the concave portion 60 (see FIG. 3). If only a small vibration (or earthquake) with a strength below a certain level occurs, the ball 4
Since 0 does not come out of the concave portion 60 and the + electrode surface 28 and the − electrode surface 38 are in a non-conductive state, the output terminal OUT maintains the ground potential. A large vibration (or earthquake) having a certain strength or more is generated, and the ball 40 comes out of the concave portion 60 and rolls or slides on the surface connecting the + electrode surface 28 and the −electrode surface 38, and the output terminal
An intermittent signal is output from OUT to the outside as a vibration (or earthquake) detection signal.

In the case where the target object is an object that may be inclined, the motion sensor 1A is at a certain angle θ ₀ from the horizontal (θ ₀ is determined from the center of gravity C of the ball 40 when the motion sensor 1A is horizontal). The angle formed between the vertical direction and the edge P of the concave portion 60. See FIG. 3) With only the following small angle inclination, the ball 40 does not come out of the concave portion 60, and the positive electrode surface 28 and the negative electrode surface 38 are in a non-conductive state.
The output terminal OUT maintains the ground potential. Motion sensor 1
When A is inclined by an angle θ larger than the fixed angle θ ₀ , the ball 40
Rolls or slips on the surface connecting the + electrode surface 28 and the −electrode surface 38 from the concave portion 60, and an intermittent signal is output from the output terminal OUT to the outside as a detection signal of inclination generation (see FIG. 4). ).

As described above, the ball 40 is previously set in the recess 60.
If the ball 40 is kept in a standby state with the
A vibration (or an earthquake) having a strength such that the ball 40 comes out of 0 or an inclination of an angle such that the ball 40 comes out of the concave portion 60 is generated.
When rolling or sliding on the surface connecting the electrode surfaces 38,
When the ball 40 just comes over the gap G, the + electrode surface 28 and the −electrode surface 38 conduct, and when the ball 40 deviates from the gap G, the + electrode surface 28 and the −electrode surface 38 become non-conductive. It is possible to extract an intermittent signal as a detection signal of occurrence of a strong vibration (or an earthquake) or occurrence of a tilt at a certain angle or more. No special structure for supporting the balls 40 is required, and high durability is obtained because of the simple configuration.

FIG. 5 is a sectional view showing a motion sensor according to a third embodiment of the present invention, and the same components as those in FIG. 1 are denoted by the same reference numerals. The motion sensor 1B of FIG. 5 transforms the substrate 10 of the motion sensor 1 of FIG. 1 into a mortar shape that is open upward together with the + electrode plate 20 and the − electrode plate 30.
0B, the + electrode plate 20B and the − electrode plate 30B (the + electrode surface 28B and the − electrode name 38B are also deformed into a mortar shape). Other components of the motion sensor 1B are configured in exactly the same manner as in FIGS.

Next, the operation of the motion sensor 1B of this embodiment will be described. If the motion sensor 1B is set horizontally on the object in advance, the ball 40 will be stationary at the center, which is the bottom of the substrate 10B, in a normal state where there is no vibration or earthquake and there is no inclination. (See FIG. 5). If only a small vibration (or earthquake) with a strength below a certain level occurs, the ball 4
0 hardly moves from the center of the substrate 10B, and the + electrode surface 28B
The output terminal OUT maintains the ground potential since the and the electrode surface 38B are non-conductive. When a large vibration (or earthquake) having a certain strength or more is generated and the ball 40 rises on the slope of the substrate 10B, the ball 40 rolls or slides on the surface connecting the + electrode surface 28B and the − electrode surface 38B, When the ball 40 just comes over the gap G, the positive electrode surface 28B and the negative electrode surface 38B
Is conducted, and is separated from the gap G, the positive electrode surface 28B and the negative electrode surface 38B become nonconductive, and an intermittent signal as a detection signal of occurrence of vibration (or earthquake) of a certain strength or more from the output terminal OUT to the outside. Is output.

In the case where the object is inclined, the motion sensor 1B is inclined from the horizontal by a certain angle θ ₀ (θ ₀ is the angle between the slope of the substrate 10B and the horizontal when the motion sensor 1B is horizontal. The angle 40)
Hardly moves from the center of the substrate 10B, and since the + electrode surface 28B and the − electrode surface 38B are in a non-conductive state, the output terminal OUT maintains the ground potential. When the motion sensor 1A has a constant angle θ ₀
When the ball 40 is tilted by a larger angle θ, the ball 40 comes out on the slope of the substrate 10B and rolls or slides on the surface connecting the + electrode surface 28B and the −electrode surface 38B. (See FIG. 6).

According to the example shown in FIG. 5, the ball 40 is normally stationary at the bottom of the mortar-shaped surface connecting the + electrode surface 28B and the -electrode surface 38B. Vibration (or earthquake) with a strength that causes the ball to hang or an inclination at an angle such that the mortar-shaped slope is less than horizontal occurs, and the ball 4
When 0 rolls or slides on the surface connecting the + electrode surface 28B and the −electrode surface 38B, when the ball 40 comes just above the gap G (see FIG. 5), the + electrode surface 28B and the −electrode surface 3
8B conducts and deviates from the gap G, the positive electrode surface 28
B and the -electrode surface 38B become non-conductive, and an intermittent signal as a detection signal of occurrence of vibration (or earthquake) or occurrence of inclination can be taken out. No special structure for supporting the balls 40 is required, and high durability is obtained because of the simple configuration.

FIG. 7 is a sectional view showing a motion sensor according to a fourth embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals. In the example of FIG. 5, the substrate 10 of FIG. 1 is formed in a mortar shape that is open upward together with the + electrode plate 20 and the − electrode plate 30. However, in the motion sensor 1C of FIG. (In FIG. 7, the substrate 10C, the −electrode plate 30C, the −electrode surface 3
8C is shown). Other components of the motion sensor 1C are configured in exactly the same manner as in FIGS.

Next, the operation of the motion sensor 1C of this embodiment will be described. If the motion sensor 1C is set horizontally on the object in advance, the ball 40 will be stationary at the bottom of the substrate 10C in a normal state where there is no vibration or earthquake and there is no inclination, and the output terminal OUT Maintains the ground potential.

After that, even if only vibration (or earthquake) in the front and back direction of the paper surface of FIG. 7 occurs, or even if vibration (or earthquake) in the horizontal direction of FIG. Output terminal OU when 40 does not rise over the valley slope
There is no change in T. Vibration (or earthquake) of a certain strength or more occurs in the left-right direction of FIG. 7, and the ball 40 rises over the slope of the valley, and the ball 40 has the − electrode surface 38C and the + electrode surface (see reference numeral 28 in FIG. 1). When the ball 40 comes to just above the gap (refer to the symbol G in FIG. 1) when the ball 40 rolls or slides on the surface connecting the electrodes, the −electrode surface 38C and the + electrode surface conduct and come off the gap. The negative electrode surface 38C and the positive electrode surface become non-conductive, and an intermittent signal is output from the output terminal OUT as a detection signal of occurrence of vibration (or earthquake) in the left-right direction in FIG.

In the case where the object may be inclined, assuming that the motion sensor 1C has been set in advance in the state of FIG. 7, the motion sensor 1C merely inclines around the rotation axis extending in the left-right direction of FIG. Or tilted around a rotation axis extending in the direction perpendicular to the plane of FIG. 7, a certain angle (θ ₀₎
With only a small angle (less than the angle formed by the slope of the substrate 10C and the horizontal when the motion sensor 1C is horizontal), the ball 40 does not rise on the slope of the valley and the -electrode surface 38C and the + electrode surface are non-conductive. In this state, the output terminal OUT maintains the ground potential. When the motion sensor 1C is tilted by an angle θ larger than the fixed angle θ ₀ around the rotation axis extending in the direction perpendicular to the paper surface of FIG. 7, the ball 40 comes out on the slope of the substrate 10C and connects the −electrode surface 38C and the + electrode surface. An intermittent signal as an inclination detection signal is output from the output terminal OUT to the outside from rolling or sliding on the surface (see FIG. 8).

According to the example shown in FIG. 7, in normal times, the ball 40 is stationary at the bottom of the V-shaped valley surface connecting the negative electrode surface 38C and the positive electrode surface. Vibration (or earthquake) in the strength and direction as if it rises, or the inclination of the direction and angle occurs so that the valley-shaped slope is less than horizontal, and the ball 40 becomes the − electrode surface 38C and the + electrode surface. When the ball 40 comes to just above the gap (refer to the symbol G in FIG. 1) when the ball 40 rolls or slides on the surface connecting the electrodes, the −electrode surface 38C and the + electrode surface conduct and come off the gap. ,-Electrode surface 38C and +
The electrode surface becomes non-conductive, and an intermittent signal as a detection signal of occurrence of vibration (or earthquake) in a certain direction or occurrence of inclination can be taken out. No special structure for supporting the balls 40 is required, and high durability is obtained because of the simple configuration.

In each of the above-described embodiments, the substrate and the cover are circular, and the positive and negative electrode surfaces are alternately juxtaposed on the substrate with a gap in the circumferential direction. The invention is not limited to this, but may be of any other shape as long as the ball is placed on the upper side and is movable from one side to the other across the gap.

For example, the motion sensor shown in FIG. 1 is deformed as shown in the motion sensor 1D shown in FIG. 9 to form a rectangular substrate 1D and a cover 50D, or a positive electrode plate 20D having a shape in which a plurality of saw blades are arranged. A plurality of + electrode blades 21D to 24D are connected to form a planar shape, and the −electrode plate 30D is
A plurality of + electrode blades 31D to 34D each having a shape in which a plurality of saw blades are arranged are connected to each other to form a planar shape, and the -electrode plate 30 is formed.
D may be arranged so as to surround the + electrode plate 20D in the same plane with a gap G at a fixed distance. + Electrode plate 20D
Forms a positive electrode surface 28D, and the surface of the negative electrode plate 30D forms a negative electrode surface 38D. These + electrode surfaces 28
D and the -electrode plate 38D are on the same plane. 27 is a + terminal, and 37 is a-terminal.

According to the example shown in FIG. 9, the gap between the positive electrode surface 28D and the negative electrode surface 38D is arranged in a zigzag pattern.
No matter which direction the vehicle rolls or slips, the intermittent signal can be reliably output. 3, 5, and 7
Each of the motion sensors may be configured such that a concave portion is provided at the center of the motion sensor of FIG. 9 or that the motion sensor is deformed into a mortar shape or a valley shape opened upward.

Further, FIG. 1 is transformed as shown in the motion sensor 1E of FIG. 10 to form a rectangular substrate 10E and a cover 50E, or the + electrode plate 20E is formed in a plane shape in which a plurality of saw blades are arranged, and- The electrode plate 30E may be configured in a plane shape in which a plurality of saw blades are arranged, and the -electrode plate 30E may be disposed so as to surround the + electrode plate 20E in the same plane with a gap G at a fixed distance. The surface of the positive electrode plate 20E is the positive electrode surface 28
E, and the surface of the electrode plate 30E forms the electrode surface 38E. The positive electrode surface 28E and the negative electrode plate 38E form the same plane. 27 is a + terminal, 37
Is a negative terminal.

According to the example of FIG. 10, the positive electrode surface 28E and the negative electrode surface 28E
Since the gaps between the electrode surfaces 38E are aligned in the left-right direction, the occurrence of vibration (earthquake) in the left-right direction or the occurrence of a tilt such that the + terminal 27 side is lifted or the − terminal 37 side is lifted is reliably detected and an intermittent signal is output. be able to.
3 and 7, a recess may be provided at the center of the motion sensor of FIG. 10, or the motion sensor may be deformed into a valley shape opened upward.

In each of the above-described embodiments and modifications, the positive electrode surface and the negative electrode surface correspond to the positive electrode plate and the negative electrode surface.
The electrode plate is mounted and formed. However, using a printed circuit board, the + electrode layer and the-electrode layer made of copper or the like are printed on an insulating substrate, or the entire surface of the insulating substrate is made of copper or the like. After the conductor layer is printed, a gap may be formed by etching and separated into a positive electrode layer and a negative electrode layer.

[0030]

According to the present invention, a ball having a conductive surface due to a motion such as a vibration, an earthquake or an inclination rolls or slips on the surface connecting the positive electrode surface and the negative electrode surface. Then, when the ball just comes over the gap, the + side electrode surface and the − side electrode surface conduct, and when the ball comes out of the gap, the + side electrode surface and the − side electrode surface become non-conductive, and the vibration, It is possible to extract an intermittent signal as a motion detection signal such as an earthquake or a tilt. No special structure for supporting the ball is required, and high durability is obtained because of the simple configuration.

[Brief description of the drawings]

FIG. 1 is a partially omitted plan view of a motion sensor according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II ′ of FIG.

FIG. 3 is a sectional view of a motion sensor according to a second embodiment of the present invention.

FIG. 4 is an operation explanatory diagram of the motion sensor of FIG. 3;

FIG. 5 is a sectional view of a motion sensor according to a third embodiment of the present invention.

FIG. 6 is an operation explanatory view of the motion sensor of FIG. 5;

FIG. 7 is a sectional view of a motion sensor according to a fourth embodiment of the present invention.

FIG. 8 is an operation explanatory diagram of the motion sensor of FIG. 7;

FIG. 9 is a partially omitted plan view showing a motion sensor according to a modification of the present invention.

FIG. 10 is a partially omitted plan view showing a motion sensor according to another modification of the present invention.

[Explanation of symbols]

 1, 1A, 1B, 1C, 1D Motion sensor 10, 10A, 10B, 10C, 10D Substrate 20, 20B, 20D + Electrode plate 28, 28B, 28D + Electrode surface 30, 30B, 30C, 30D-Electrode plate 38, 38B , 38C, 38D-electrode surface 40 ball 50, 50D, 50E cover 60 recess

Claims (4)

[Claims] 1. A positive electrode surface and a negative electrode ball having a conductive surface and being alternately juxtaposed to each other with a gap therebetween, said ball being placed on the upper side, and being movable from one side to the other side across the gap. A motion sensor, comprising: an electrode surface; 2. A positive electrode surface and a negative electrode ball having a conductive surface, which are alternately juxtaposed with a gap therebetween, and the ball is placed on the upper side, and is movable from one side to the other across the gap. A motion sensor comprising: an electrode surface; and a concave portion provided on a surface connecting the + electrode surface and the −electrode surface, wherein the ball can freely enter and exit. 3. A ball having a conductive surface and alternately juxtaposed to each other with a gap therebetween, and the ball is placed on the upper side so as to be movable from one side to the other across the gap, and a positive electrode surface and a negative electrode side. A motion sensor comprising: an electrode surface; and a surface connecting the + electrode surface and the −electrode surface formed in a mortar shape opened upward. 4. A ball having a conductive surface and alternately juxtaposed to each other with a gap therebetween, and the ball is placed on the upper side so as to be movable from one side to the other over the gap. A motion sensor, comprising: an electrode surface; and a surface connecting the + electrode surface and the −electrode surface formed in a valley shape that opens upward.