JP4805856B2 - Voltage detector - Google Patents

Description

  The present invention includes a cylindrical main body portion, and a movable portion that is connected to the main body portion so as to be movable with respect to the main body portion and in which a sensor that detects an active state of the inspection object is disposed. It relates to a voltage detector.

As this kind of voltage detector, a voltage detection device disclosed in Japanese Utility Model Laid-Open No. 1-124571 is known. This voltage detection apparatus includes a trunk portion formed in a substantially quadrangular prism shape and a lid body into which the tip of the trunk portion is loosely inserted. In this case, a power switch is disposed inside the front end portion of the body portion, and a spring is disposed between the power switch and the protrusion disposed inside the lid. In this voltage detection device, when the tip of the lid is brought into contact with the electric wire as the inspection object and the voltage detection device (body) is pressed along the axial direction thereof, it resists the pressing force of the spring. The lid is moved to the body side. In this case, when the lid body comes close to a predetermined distance with respect to the body portion, the power switch is pressed by the projection of the lid body, and the supply of driving power is started. Further, by pressing the lid against the electric wire, the detection electrode disposed inside the tip of the lid and the electric wire are brought close to each other, and the voltage is detected by the detection electrode. Thereby, the live state of the test object is detected.
Japanese Utility Model Laid-Open No. 1-124571 (pages 13-17, FIG. 9-11)

  However, the above-described voltage detector has the following problems. That is, in this voltage detection device, the power switch is turned on when the voltage detection device (body) is moved along the axial direction. For this reason, for example, when there is an obstacle and it is difficult to move the voltage detector along the axial direction, the power supply for driving is not started and the inspection itself becomes impossible, or the lid (detection There is a possibility that the inspection result may be inaccurate because the electrode) and the inspection object cannot be sufficiently brought close to each other. Moreover, in this electric detection apparatus, in order to make it easy to press with respect to the electric wire as a test object, the front end surface of a cover body is formed in the comparatively big shape. For this reason, for example, when inspecting the live state of the outlet of the commercial power supply, the lid (detection electrode) is sufficiently close to the electrode as the inspection object disposed behind the insertion port. In this case, the test result may be inaccurate or the test itself may be impossible.

  The present invention has been made in view of such problems, and provides a voltage detector that can reliably inspect the live state of an inspection object regardless of the position of the inspection object and the surrounding state. The main purpose.

In order to achieve the above object, the voltage detector according to claim 1 is provided with a cylindrical main body, a movable part connected to the distal end of the main body so as to be movable relative to the main body, and the movable part. A voltage detector provided with a sensor for detecting a live state of an object to be inspected and a power switch for turning on driving power, wherein the movable portion includes a central portion of the main body portion and a movable portion of the movable portion. It is connected to the main body via a coil spring disposed along the direction connecting the center portion movably in a direction approaching and moving away from to the orientation and the body portion inclined with respect to the main body portion And the power switch is disposed on the movable portion so as to face the end portion of the first electrode and the first electrode disposed on the body portion so as to surround the coil spring. and a second electrode, which direction the movable part relative to the body portion An inclination angle even tilted is in contact with the first electrode and the second electrode when and where the movable unit when reaches the predetermined angle is moved in the direction to close against the main body to a predetermined distance The drive power supply can be turned on.

  The voltage detector according to claim 2 is the voltage detector according to claim 1, wherein the movable portion has a base end portion configured in a cylindrical shape, and the base end portion and the tip end portion of the main body portion are separated from each other. Connected to the main body in a state of being fitted to each other, and when the base part moves more than a predetermined length, the base end part abuts on the distal end part of the main body part to restrict the movement beyond the predetermined length. Be made.

Furthermore, electroscope of claim 3, wherein, in the voltage detector of claim 1, wherein the distal end portion of the movable part projecting portion having a space therein is formed, said sensor, said at the protrusion It is arranged in the internal space.

According to a fourth aspect of the present invention, in the voltage detector according to the third aspect , the protrusion is configured in a plate shape so as to be inserted into an outlet of a commercial power outlet.

According to the voltage detector of the first aspect, the movable part is connected to the main body part via the coil spring so as to be movable in a direction inclined with respect to the main body part and a direction in which the main body part is in contact with or separated from the main body part. What is a conventional voltage detector that does not supply drive power unless it is pressed along the axis by providing a power switch that can turn on the drive power when tilted at a predetermined angle and close to a predetermined distance? In contrast, in addition to the operation of pressing along the axis, the driving power can be supplied by an operation of moving along the direction intersecting the axis of the voltage detector. Therefore, according to this voltage detector, regardless of the position of the object to be inspected and the surrounding condition, for example, there is an obstacle, and it is difficult to move the voltage detector (main body part) along its axial direction. Even in such a case, the live state of the inspection object can be reliably inspected. In addition, the first electrode disposed in the main body and the movable portion are disposed at the movable portion so that the movable portion is inclined at a predetermined angle with respect to the main body when the movable portion is close to the main body by a predetermined distance. In some cases, the power switch is configured to include the second electrode that is brought into contact with the first electrode and the driving power is turned on, so that the circuit board is simple when the movable portion moves by a predetermined distance. Therefore, it is possible to reliably supply the driving power. Further, the movable part can be tilted in any direction with respect to the main body part. At this time, no matter which direction the movable part is tilted, when the tilt angle becomes a predetermined angle, the first electrode and The second electrodes can be reliably brought into contact with each other.

  According to the voltage detector of the second aspect, the movable portion is connected to the main body portion in a state where the base end portion configured in a cylindrical shape and the distal end portion of the main body portion are fitted to each other, and a predetermined length is provided. Since the base end portion of the movable portion is brought into contact with the distal end portion of the main body portion and the movement of a predetermined length or more is restricted when the movement portion is moved, the movable portion and the main body portion are connected. It is possible to reliably prevent a situation in which the coil spring is extremely stretched and the function as a spring is lost, or the movable part is detached from the main body part and is damaged.

Further, according to the voltage detector of the third aspect , the sensor is disposed in the space inside the projection formed at the tip of the movable part, so that the tip surface of the movable part is formed relatively large. Unlike a voltage detection device, even when inspecting the live state of a test object located in a narrow space, a sensor is attached to the test object by inserting a protrusion from the entrance of the narrow space. As a result of being sufficiently close, the live state of the inspection object can be accurately inspected.

In addition, according to the voltage detector of claim 4 , the live state of the outlet can be reliably and easily inspected by configuring the protruding portion in a plate shape so that it can be inserted into the outlet of the commercial power outlet. it can.

  Hereinafter, the best mode of a voltage detector according to the present invention will be described with reference to the accompanying drawings.

  First, the configuration of the voltage detector 1 will be described with reference to the drawings. A voltage detector 1 shown in FIG. 1 is an example of a voltage detector according to the present invention, and can inspect (detect) whether or not an AC voltage equal to or higher than a predetermined voltage value is supplied to a test object (active state). It is configured. Specifically, the voltage detector 1 includes a main body portion 2 and a movable portion 3 as shown in FIG. The main body 2 is formed in a cylindrical shape (an example of a cylindrical shape) as a whole by a non-conductive material such as a resin. In this case, as shown in FIG. 2, the distal end portion 2 a of the main body portion 2 is formed to have a smaller diameter than other portions excluding the distal end portion 2 a and is formed to have a larger diameter than the distal end portion 2 a of the main body portion 2. The movable portion 3 is configured to be fitted to the base end portion 3b.

  Moreover, as shown in FIG. 2, the disk-shaped 1st partition plate 21 (FIG. 2) formed with the nonelectroconductive material inside the site | part located in the base end part side rather than the front-end | tip part 2a of the main-body part 2 is shown. 3 is also attached. In this case, as shown in FIG. 2, a positive electrode 22 for contacting the positive terminal of the battery 50 is attached to one surface 21 a (the lower surface in the drawing) of the first partition plate 21. Further, one end portion of the coil spring 23 is fixed to the central portion of the other surface 21b (the upper surface in the figure) of the first partition plate 21. A cylindrical first electrode 24 (see also FIG. 3) is attached to the other surface 21 b of the first partition plate 21 so as to surround the coil spring 23. In this case, as shown in FIG. 2, one end of the coil spring 23 penetrates the first partition plate 21 and is electrically connected to the plus electrode 22. The first electrode 24 is electrically connected to a negative electrode (not shown) attached to a cap 26 described later via a lead wire 24a.

  As shown in FIG. 1, a resin or rubber grip 25 that functions as a slip stopper when gripping the main body 2 (electrical detector 1) is attached to the outer periphery of the main body 2 on the distal end portion 2 a side. ing. Furthermore, as shown in the figure, the base end 2b of the main body 2 is provided with a cap 26 that is detachable from the main body 2 and is rotatable with respect to the main body 2 in the mounted state. It is attached. In this case, the cap 26 functions as a main switch that switches on / off by rotating it by a predetermined angle. Further, on the inner side of the cap 26, a negative electrode for contacting the negative terminal of the battery 50 (see FIG. 2) accommodated in the internal space of the main body 2 partitioned by the partition plate 21 and the cap 26. (Not shown) is attached.

  As shown in FIG. 3, the movable portion 3 is configured in a cylindrical shape in which a tip portion 3 a is formed with a slightly small diameter. As shown in FIG. 2, the movable portion 3 is connected to the main body portion 2 as will be described later in a state where the base end portion 3 b and the distal end portion 2 a of the main body portion 2 are fitted to each other. Further, a plate-like protrusion 3c having a space inside is formed at the tip 3a of the movable part 3. In this case, the size of the protrusion 3c is defined such that it can be inserted into an outlet of a commercial power outlet described later (for example, an outlet 72 of the outlet 70 shown in FIG. 5). Moreover, as shown in the figure, the sensor 41 is accommodated in the internal space of the protrusion 3c. Here, the sensor 41 outputs a sensor signal (for example, an alternating current) based on the capacitance between the sensor 41 and the inspection object when an AC voltage is supplied to the inspection object.

  In addition, as shown in FIG. 2, a disc-shaped second partition plate 31 made of a non-conductive material is disposed on the inner side of a portion of the movable portion 3 that is located on the side of the distal end portion 3 a slightly from the base end portion 3 b. (See also FIG. 3). As shown in FIG. 2, the circuit board 4 is disposed in the internal space of the movable portion 3 partitioned by the second partition plate 31. In this case, the circuit board 4 outputs a buzzer sound when a detection circuit for detecting a voltage based on a sensor signal from the sensor 41 and a detection value of the voltage detected by the detection circuit is equal to or higher than a preset value. A buzzer that emits light, an LED that emits light when the detected value is equal to or higher than a set value (none of which are shown), and the like are disposed.

  Further, as shown in FIG. 2, the other end of the coil spring 23 is fixed to the central portion of the one surface 31 a (the lower surface in the drawing) of the second partition plate 31. That is, the movable part 3 has the main body via the coil spring 23 with the above-described configuration in which both end portions of the coil spring 23 are fixed to the first partition plate 21 of the main body part 2 and the second partition plate 31 of the movable part 3. It is connected to the portion 2 and supported by a coil spring 23 so as to be swingable with respect to the main body portion 2. For this reason, the movable part 3 is in the direction inclined with respect to the main body part 2 (direction of arrow A shown in the figure) and in the direction of contact with and away from the main body part 2 (direction of arrow B shown in the figure). It can move along. Moreover, since the movable part 3 is connected in a state in which the base end part 3b and the front end part 2a of the main body part 2 are fitted, the base end part 3b is moved when the movable part 3 moves a predetermined length or more in each direction described above. Abuts against the tip 3a of the main body 2 and further movement is restricted.

  As shown in FIG. 2, an annular second electrode 32 (see also FIG. 3) is attached to one surface 31 a of the second partition plate 31 so as to surround the coil spring 23. In this case, as shown in FIG. 2, the other end of the coil spring 23 is electrically connected to the plus-side power input terminal 42a of the circuit board 4 via the lead wire 23a, and the second electrode 32 is connected to the circuit board. 4 is electrically connected to the negative side power input terminal 42b via the lead wire 32a.

  Here, the first electrode 24 and the second electrode 32 described above function as a power switch in the present invention. Specifically, as shown in FIG. 2, when no external force is applied to the movable portion 3, the electrodes 24 and 32 are separated from each other, and the supply of driving power to the circuit board 4 is stopped. Maintained. On the other hand, when the movable part 3 is moved (tilted) by a predetermined angle in a direction inclined with respect to the main body part 2 as shown in FIG. 4 and as shown in FIG. When the second electrode 32 attached to the movable part 3 comes into contact with the first electrode 24 attached to the main body part 2, the two electrodes 24, 32 is electrically connected, whereby supply of driving power from the battery 50 to the circuit board 4 is started. In this case, the voltage detector 1 employs a cylindrical first electrode 24 and an annular second electrode 32. For this reason, no matter which direction the movable part 3 is tilted, when the tilt angle reaches a predetermined angle, the electrodes 24 and 32 can be reliably brought into contact with each other.

  Next, a method for inspecting whether or not a voltage is supplied to the object to be inspected using the voltage detector 1 (live state) will be described with reference to the drawings.

  Initially, the method to test | inspect the live state of the electric wire 60 as a test object shown in FIG. First, from the state shown in FIG. 1, the cap 26 is rotated to switch the main switch to “ON”. Next, the grip 25 is attached to the main body 2 and, as shown in FIG. 4, the voltage detector 1 crosses the direction of the arrow C shown in the drawing, that is, the axis of the voltage detector 1 (main body 2). For example, the side surface of the protruding portion 3 c is pressed against the electric wire 60 by moving along the direction that is orthogonal. At this time, the reaction force of the pressing acts on the movable part 3, and the movable part 3 resists the pulling force due to the deformation of the coil spring 23, so that the movable part 3 is directed to the direction of the arrow D shown in FIG. It is moved (tilted) along the tilting direction. Next, when the movable part 3 is moved by a predetermined angle, as shown in the figure, the first electrode 24 and the second electrode 32 come into contact with each other and the electrodes 24 and 32 are electrically connected. Then, supply of driving power to the circuit board 4 is started.

  At this time, for example, when a voltage is supplied to the electric wire 60, the sensor 41 in the protruding portion 3 c brought close to the electric wire 60 by pressing the protruding portion 3 c outputs a sensor signal to detect the circuit board 4. A circuit detects a voltage based on the sensor signal. In this case, when the detection value detected by the detection circuit is greater than or equal to the set value, the buzzer outputs a buzzer sound and the LED emits light. On the other hand, when the detected value is less than the set value, the output of the buzzer sound from the buzzer and the light emission of the LED are maintained. Thereby, the live state of the electric wire 60 is notified.

  In this case, unlike the conventional voltage detection device in which the driving power is not supplied to the detection circuit unless it is pressed along the axis, the voltage detector 1 is operated in addition to the operation of pressing along the axis. It is possible to supply the driving power to the circuit board 4 also by an operation of moving along the direction intersecting the axis of the main body 2). For this reason, in this voltage detector 1, for example, even when an obstacle is present and it is difficult to move the voltage detector 1 (main body part 2) along the axial direction, the activation of the electric wire 60 as the inspection object is active. It is possible to reliably check the electric state. Moreover, in this electric detector 1, since it can test | inspect by pressing the electric wire 60 with the side surface of the projection part 3c, compared with the structure which presses the electric wire 60 with the front-end | tip part of the projection part 3c, it is a front-end | tip part. Inspection in a state where the side surface of the sensor 41 having a larger area is close to the electric wire 60 is possible. For this reason, as a result of being able to detect the live state of the electric wire 60 using the wider area | region in the sensor 41, it is possible to improve the reliability of a test result.

  Next, a method for inspecting the active state of the commercial power outlet 70 (specifically, the terminal piece 71 of the outlet 70) as the inspection object shown in FIG. In this inspection, as described above, the grip 25 is attached with the main switch switched to “ON”, and the protrusion 3 c is inserted into the outlet 72 of the outlet 70 as shown in FIG. Next, the voltage detector 1 is pressed in the direction of the arrow E shown in the figure, that is, the direction along the axis of the voltage detector 1. At this time, the distal end portions of the projections 3 c come into contact with the distal end portions of the two terminal pieces 71 disposed on the back side of the insertion port 72, and the reaction force of pressing acts on the movable portion 3. . For this reason, the movable part 3 is moved against the pressing force of the coil spring 23 along the direction of the arrow F shown in FIG. Subsequently, when the movable part 3 is moved by a predetermined distance, the first electrode 24 and the second electrode 32 come into contact with each other, and both the electrodes 24 and 32 are electrically connected to drive the circuit board 4. Supply of power for the vehicle is started.

  Next, by pressing the voltage detector 1 further, as shown in FIG. 6, the protrusion 3 c is inserted between the two terminal pieces 71. At this time, for example, when a voltage is supplied to the outlet 70 (terminal piece 71), the sensor 41 outputs a sensor signal, and the detection circuit of the circuit board 4 detects the voltage based on the sensor signal. In this case, when the detection value detected by the detection circuit is greater than or equal to the set value, the buzzer outputs a buzzer sound and the LED emits light. On the other hand, when the detected value is less than the set value, the output of the buzzer sound from the buzzer and the light emission of the LED are maintained. Thereby, the live state of the outlet 70 is notified. In this case, unlike the conventional voltage detection device in which the distal end surface of the movable portion 3 is formed large, the voltage detector 1 includes a plate-like protrusion 3 c that can be inserted into the insertion port 72 of the outlet 70. Therefore, by inserting the protrusion 3c into the insertion port 72, the sensor 41 can be sufficiently brought close to the terminal piece 71, so that the live state of the outlet 70 can be accurately inspected. .

  Thus, according to the voltage detector 1, the movable part 3 is connected to the main body part 2 via the coil spring 23 so as to be movable in a direction inclined with respect to the main body part 2 and a direction in which the main body part 2 contacts and separates from the main body part 2. Since the first electrode 24 and the second electrode 32 that can turn on the driving power when the device is inclined at a predetermined angle with respect to the main body 2 and close to a predetermined distance, the main body 2 must be pressed along the axis. For example, unlike a conventional voltage detection device in which driving power is not supplied to the detection circuit, in addition to an operation of pressing along the axis, the circuit is also moved by an operation of moving along the direction intersecting the axis of the voltage detector 1. Driving power can be supplied to the substrate 4. Therefore, according to the voltage detector 1, regardless of the position of the object to be inspected and the surrounding condition, for example, an obstacle exists and the voltage detector 1 (main body 2) is moved along the axial direction. Even when the operation is difficult, the live state of the inspection object can be reliably inspected.

  Further, according to the voltage detector 1, the movable portion 3 is connected to the main body portion 2 in a state where the base end portion 3 b configured in a cylindrical shape and the distal end portion 2 a of the main body portion 2 are fitted to each other, and a predetermined amount is provided. Since the base end portion 3b of the movable portion 3 is in contact with the distal end portion 2a of the main body portion 2 when the movable portion 3 is moved more than the length, the movable portion 3 and the main body are restricted. It is possible to reliably prevent a situation in which the coil spring 23 connecting the part 2 is extremely extended and the function as a spring is lost or the movable part 3 is detached from the main body part 2 and is damaged. it can.

  Further, according to the voltage detector 1, the first electrode 24 disposed in the main body 2 and the movable portion 3 are disposed when the movable portion 3 is close to the main body 2 up to a predetermined distance and Since the power switch is configured by including the second electrode 32 that contacts the first electrode 24 when the movable part 3 is inclined at a predetermined angle with respect to the main body part 2, the movable part 3 has a simple configuration. The driving power can be reliably supplied to the circuit board 4 when is moved by a predetermined distance.

  Further, according to the voltage detector 1, the sensor 41 is disposed in the space inside the protrusion 3c formed at the tip 3a of the movable part 3, so that the tip of the movable part 3 is formed relatively large. Unlike the conventional voltage detection device, like the outlet 70, the live power of the inspection object in which the terminal piece 71 is disposed in the back of the insertion port 72, that is, the inspection object located in a narrow space. Even in the case of inspecting the state, by inserting the protrusion 3c from the insertion port 72, the sensor 41 can be sufficiently brought close to the terminal piece 71. As a result, the live state of the inspection object is accurately inspected. be able to.

  Further, according to the voltage detector 1, the projection 3c is configured in a plate shape so that it can be inserted into the outlet 72 of the outlet 70 of the commercial power supply, so that the live state of the outlet 70 can be reliably and easily inspected. Can do.

  In addition, this invention is not limited to said structure. For example, although the configuration example including the protruding portion 3c formed in a plate shape has been described above, the shape of the protruding portion 3c is not limited thereto, and can be formed in any shape. As an example, the movable portion 103 shown in FIG. 7 is configured to include a prismatic (a quadrangular prism as an example) projection 103c, and the movable portion 203 illustrated in FIG. 8 is configured to include a conical projection 203c. ing. Further, the movable portion 303 shown in FIG. 9 is configured to include a columnar protrusion 303c, and the movable portion 403 illustrated in FIG. Yes. In this case, for example, the movable parts 3, 103, 203, and 303 described above are provided by providing a connecting part that can connect and disconnect the second partition plate 31 (or the first partition plate 21) and the coil spring 23. , 403 can be arbitrarily replaced.

FIG. 3 is a plan view of the voltage detector 1. 3 is a cross-sectional view of a main body 2 and a movable part 3. FIG. 2 is an exploded perspective view of a main body 2 and a movable part 3. FIG. 6 is an explanatory diagram for explaining a method of inspecting an electric wire 60. FIG. 5 is a first explanatory diagram for explaining a method of inspecting the outlet 70. FIG. It is the 2nd explanatory view for explaining the inspection method to outlet 70. 3 is a perspective view illustrating a configuration of a movable unit 103. FIG. 3 is a perspective view showing a configuration of a movable unit 203. FIG. 4 is a perspective view showing a configuration of a movable unit 303. FIG. 4 is a perspective view showing a configuration of a movable unit 403. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric detector 2 Main-body part 2a Tip part 3,103,203,303,403 Movable part 3a Tip part 3c, 103c, 203c, 303c, 403c Projection part 23 Coil spring 24 1st electrode 32 2nd electrode 41 Sensor 50 Battery 60 Electric wire 70 outlet

Claims (4)

A cylindrical main body, a movable part connected to the front end of the main body so as to be movable with respect to the main body, and a sensor that is disposed on the movable part and detects a live state of the inspection object A voltage detector comprising a power switch for turning on the drive power,
The movable part is coupled to the main body via a coil spring disposed along the direction connecting the center of the central portion and the movable portion of the main body portion, inclined with respect to the main body portion It is configured to be movable in an orientation and an orientation that is close to and away from the main body,
The power switch includes a first electrode disposed on the main body so as to surround the coil spring, and a second electrode disposed on the movable portion so as to face an end of the first electrode. with the door in an orientation wherein the tilt angle as the movable portion is inclined at any orientation relative to the body portion and to the movable portion when reaches the predetermined angle is close to the the main body portion to a predetermined distance A voltage detector configured to be able to turn on the driving power when the first electrode and the second electrode are in contact with each other when moved.   The movable portion is connected to the main body portion in a state where the base end portion is configured in a cylindrical shape and the base end portion and the tip end portion of the main body portion are fitted to each other, and the movable portion has a predetermined length or more. The voltage detector according to claim 1, wherein the base end portion abuts on the distal end portion of the main body portion when moving, and movement of the predetermined length or more is restricted. A protrusion having a space inside is formed at the tip of the movable part,
The voltage detector according to claim 1 or 2 , wherein the sensor is disposed in the internal space of the protrusion. The voltage detector according to claim 3 , wherein the protrusion is configured in a plate shape so as to be inserted into an outlet of a commercial power outlet.

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