JP6417108B2 - Electricity meter - Google Patents

Description

  The present invention relates to a watt-hour meter having a switch unit for detecting opening and closing of a terminal cover with respect to a case.

  The watt hour meter is configured to include a terminal portion that fixes the power distribution line, a case that houses the terminal portion, and a terminal cover that covers the terminal portion and is attached to the case. In such a watt-hour meter, whether the terminal cover is attached to the case, that is, whether the terminal cover is open or closed is detected.

  FIG. 7 is a perspective view of a conventional watt hour meter having a switch portion for detecting opening and closing of the terminal cover. 7 (a) and 7 (b) show a state in which the terminal cover 11 is attached to the case 10, FIG. 7 (c) shows a state in which the base 13 as a terminal portion is stored in the case 10, and FIG. 7 (d) shows a terminal. The detail of the cover 11 is shown.

  FIG. 8 is an exploded view of the conventional watt-hour meter shown in FIG. The circuit unit 14 having the display unit 15 for displaying the electric energy is housed in the case 10. A sensor part 17 for detecting a current flowing through the conductor part 16 is attached to the conductor part 16.

  Of the four conductor portions 16, the left two conductor portions 16 are attached with power supply side terminals for fixing the distribution lines from the power supply side. A load side terminal for fixing a distribution line to a consumer is attached to the two right conductor portions 16. The conductor portion 16 is housed in the base 13, and the terminal cover 11 covers the base 13 and is attached to the case 10.

  A switch portion 18 is attached to the circuit portion 14, and a switch push portion 19 is attached to the terminal cover 11. When the terminal cover 11 is attached to the case 10, the switch push portion 19 comes into contact with the switch portion 18, so that the switch portion 18 is turned on. Thereby, opening / closing of the terminal cover 11 is detected.

  As a conventional technique, for example, an automatic meter reading communication device described in Patent Document 1 is known. The automatic meter-reading communication device includes a line connection unit for connecting to an external management device via a communication network, a wireless master unit for performing wireless communication with a wireless slave unit connected to the meter, and a line connection. A switch unit for switching conduction / disconnection between the unit and the radio base unit, a case for storing the line connection unit, the radio base unit, and the switch unit, a cover attached to the case, a cover formed on the cover, And a rib for switching the switch portion to a conductive state when the switch is attached to the case.

JP 2006-221574 A

  However, since the switch portion 18 shown in FIG. 8 has a short stroke, the switch portion 18 and the switch push portion 19 may be separated from each other due to vibration and shock, which may cause erroneous detection of opening and closing of the terminal cover. Also in Patent Document 1, there is a risk of erroneous detection of opening and closing of the terminal cover.

  The subject of this invention provides the watt-hour meter which can improve the opening / closing detection performance of a terminal cover.

In order to solve the above-mentioned problem, the invention of claim 1 according to the present invention includes a case that houses a terminal portion that fixes a power distribution line, a terminal cover that covers the terminal portion and is attached to the case, and the case a switch portion provided within the terminal cover and is integrally molded and having a spring property, the plate where the protrusion when the terminal cover protruding portion is formed is attached to the casing presses the switch portion The switch push part is provided.

The invention of claim 2 comprises a case for housing a terminal portion for fixing a power distribution line, a terminal cover for covering the terminal portion and attached to the case, a switch portion provided in the case, and a spring property. A projection part and a claw part formed, and the projection part includes a switch push part that pushes the switch part when the terminal cover is attached to the case, and the terminal cover includes the switch push part. wherein the groove portion for mating with the claw portion is formed to attach.

The invention of claim 3 includes a case for housing a terminal portion for fixing a power distribution line, a terminal cover for covering the terminal portion and attached to the case, a switch portion provided in the case, and a convex portion. No, comprising a switch pushing portion which the protrusion presses the switch portion when the terminal cover is attached to the case, and a coil spring having one end attached to the projecting portion of the projecting portion of the switch pushing portion, the the terminal cover, wherein the spring storage portion consisting of the recess for accommodating the coil spring is formed.

  According to a fourth aspect of the present invention, the switch push portion includes a rib for preventing rotation.

  The invention of claim 5 is characterized in that a peripheral wall portion is provided around the switch push portion.

The invention of claim 6 is characterized in that a plurality of the switch push portions are provided according to the number of the switch portions.

  According to the present invention, since the switch push portion has a spring property, the switch portion and the switch push portion are not separated from each other. Accordingly, it is possible to provide a watt-hour meter that eliminates erroneous detection of opening / closing of the terminal cover and can improve the opening / closing detection performance of the terminal cover.

It is a schematic block diagram which shows the terminal cover with which the switch push part was integrated in the watt-hour meter which concerns on Example 1 of this invention. It is a schematic block diagram which shows the state which attached to the terminal cover the switch push part provided separately from the terminal cover in the watt-hour meter which concerns on Example 2 of this invention. It is a schematic block diagram which shows the state which attached the switch push part to the spring and accommodated in the terminal cover in the watt-hour meter which concerns on Example 3 of this invention. It is a schematic block diagram which shows the state which attached the switch push part in which the rotation prevention rib was formed in the watt-hour meter which concerns on Example 4 of this invention to the spring, and was accommodated in the terminal cover. It is a schematic block diagram which shows the rib formed in the terminal cover around the switch push part in the watt-hour meter which concerns on Example 5 of this invention. It is a schematic block diagram which shows the state which attached the switch push part which expanded the switch contact | abutting area in the watt-hour meter which concerns on Example 6 of this invention to the spring, and was accommodated in the terminal cover. It is a perspective view of the conventional watt-hour meter which has a switch part for detecting opening and closing of a terminal cover. It is an exploded view of the conventional watt-hour meter shown in FIG.

  Hereinafter, the watt-hour meter which concerns on embodiment of this invention is demonstrated in detail, referring drawings.

  FIG. 1 is a schematic configuration diagram illustrating a terminal cover 11A in which a switch push portion 19a is integrated in the watt-hour meter according to the first embodiment of the present invention. In addition, since parts other than terminal cover 11A are the same as the structure of the watt-hour meter shown in FIG. 7, the structure of terminal cover 11A is demonstrated here.

  The terminal cover 11A shown in FIG. 1 is formed with a U-shaped step portion 11a. When the terminal cover 11A is attached to the case 10, the step contact portion 11a (see FIG. Abut).

  A switch push portion 19a protrudes from the terminal cover 11A along the longitudinal direction of the step portion 11a having a U-shape. A protrusion 20 is formed at the tip of the switch push portion 19a, and the protrusion 20 comes into contact with the switch portion 18 when the terminal cover 11A is attached to the case 10.

  The switch push portion 19a has a spring property (elasticity) and is made of, for example, a thermoplastic plastic such as polycarbonate. The terminal cover 11A is also made of a thermoplastic plastic such as polycarbonate. That is, the switch push portion 19a having a spring property is integrally formed with the terminal cover 11A.

  According to the terminal cover 11A configured as described above, the switch push portion 19a having a spring property is formed integrally with the terminal cover 11A, and the protrusion 20 is formed at the tip of the switch push portion 19a. When 11 A is attached to the case 10, the protruding portion 20 comes into contact with the switch portion 18 and pushes the switch portion 18 to turn on the switch portion 18.

  Even if vibration or impact occurs, the switch push portion 19a has a spring property, so that the switch portion 18 and the switch push portion 19a are not separated from each other. Accordingly, erroneous detection of the opening / closing of the terminal cover 11A is eliminated, and the opening / closing detection performance of the terminal cover can be improved.

  FIG. 2 is a schematic configuration diagram illustrating a state in which a switch push portion 19b provided separately from the terminal cover 11B is attached to the terminal cover 11B in the watt-hour meter according to the second embodiment of the present invention. 2A is a perspective view in which the switch push portion 19b is attached to the terminal cover 11B, FIG. 2B is an exploded perspective view of the terminal cover 11B and the switch push portion 19b, and FIG. 2C is a terminal cover 11B. It is sectional drawing of switch push part 19b.

  As shown in FIG. 2B, the switch push portion 19b includes three leg portions 191 to 193, a connecting portion 194 for connecting them, claw portions 195 and 196 formed at the tips of the leg portions 192 and 193, leg portions It is comprised from the protrusion part 20a formed in the front-end | tip of the part 191. As shown in FIG. The switch push portion 19b has a spring property, and is made of, for example, thermoplastic plastic such as polycarbonate, and pushes the switch portion 18 when the terminal cover 11B is attached to the case 10.

  As shown in FIG. 2B, the terminal cover 11B is formed with protruding portions 11b and 11c as attachment portions for attaching the switch push portion 19b. Groove portions 11d and 11e are formed in the protruding portions 11b and 11c.

  As shown in FIG. 2C, the claw portion 195 formed on the leg portion 192 of the switch push portion 19b is hooked on the groove portion 11d formed on the protruding portion 11b of the terminal cover 11B. The claw portion 196 formed on the leg portion 193 is hooked on the groove portion 11e formed on the protruding portion 11c of the terminal cover 11B.

  According to the terminal cover 11B of the second embodiment configured as described above, the switch push portion 19b having a spring property is attached to the terminal cover 11B as described above, and the protruding portion 20a is formed at the tip of the switch push portion 19b. Therefore, when the terminal cover 11B is attached to the case 10, the protruding portion 20a contacts the switch portion 18 and pushes the switch portion 18 to turn on the switch portion 18.

  Even if vibration or impact occurs, the switch push portion 19b has a spring property, so that the switch portion 18 and the switch push portion 19b are not separated from each other. Therefore, erroneous detection of opening / closing of the terminal cover 11B is eliminated, and the opening / closing detection performance of the terminal cover 11B can be improved.

  Further, by making the switch push portion 19b a separate component from the terminal cover 11B, the switch push portion 19b can be protected and enhanced, and can be replaced when the switch push portion 19b is damaged.

  FIG. 3A is a schematic configuration diagram showing a state in which the switch push portion 19c is attached to the spring 21 and stored in the terminal cover 11C in the watt-hour meter according to Embodiment 3 of the present invention. FIG. 3B is an exploded perspective view of the switch push portion 19c, the spring 21, and the terminal cover 11C.

  The switch push portion 19c is a small component having a convex portion, and the protruding portion of the switch push portion 19c is attached to the spring 21 as shown in FIG. The terminal cover 11 </ b> C is formed with a cylindrical spring accommodating portion 110 for accommodating the spring 21. As shown in FIG. 3D, a tapered portion 112 is formed at the bottom of the spring accommodating portion 110, and the spring 21 is fixed by the tapered portion 112.

  According to the terminal cover 11C of the third embodiment configured as described above, the spring 21 to which the switch push portion 19c is attached is accommodated in the spring accommodating portion 110. When the terminal cover 11C is attached to the case 10, the switch push portion 19c attached to the spring 21 comes into contact with the switch portion 18 and pushes the switch portion 18 to turn on the switch portion 18.

  Even if vibration or impact occurs, the switch portion 18 and the switch push portion 19c are not separated by the elasticity of the spring 21. Therefore, erroneous detection of the opening / closing of the terminal cover 11C is eliminated, and the opening / closing detection performance of the terminal cover 11C can be improved.

  Further, the switch 21 can be downsized by the spring 21 and the reliability of the spring 21 can be increased.

  FIG. 4A shows a state in which the switch push portion 19d formed with the rotation prevention rib 22 is attached to the spring 21 and accommodated in the terminal cover 11D in the watt-hour meter according to Embodiment 4 of the present invention. FIG. 4 is an exploded perspective view of a switch push portion 19d, a spring 21, and a terminal cover 11D on which rotation prevention ribs 22 are formed.

  The configuration shown in FIG. 4 is different from the configuration shown in FIG. 3 in that the switch push portion 19d, the spring storage portion 113, and the guide portion 114 are different, so only the different portions will be described.

  The switch push portion 19d is a small component having a convex portion, and is formed with an anti-rotation rib 22 for preventing rotation. The spring accommodating portion 113 is formed with a guide portion 114 having a notch for moving the rotation preventing rib 22 up and down.

  According to the terminal cover 11D of the fourth embodiment configured as described above, the spring 21 to which the switch push portion 19d is attached is housed in the spring housing portion 113 through the hole portion 111. At this time, the rotation prevention rib 22 is inserted into the guide portion 114. When the terminal cover 11D is attached to the case 10, the switch push portion 19d contacts the switch portion 18 and pushes the switch portion 18 to turn on the switch portion 18.

  Even if vibration or impact occurs, the switch portion 18 and the switch push portion 19d are not separated by the elasticity of the spring 21. Therefore, erroneous detection of opening / closing of the terminal cover 11D is eliminated, and the opening / closing detection performance of the terminal cover 11D can be improved.

  Further, since the rotation prevention rib 22 is provided in the switch push portion 19d, the switch push portion 19d does not rotate even if the positions of the switch portion 18 and the switch push portion 19d are shifted. It can be made to contact.

  FIG. 5A is a schematic configuration diagram showing ribs 115 formed around the switch push portion 19b and on the terminal cover 11E in the watt-hour meter according to Embodiment 5 of the present invention. FIG. 5B is an exploded perspective view of the terminal cover 11E on which the rib 115 is formed and the switch push portion 19b.

  The switch push portion 19b shown in FIG. 5 has the same configuration as the switch push portion 19b shown in FIG. 2, and is attached to the terminal cover 11E. The rib 115 is formed to protrude from the terminal cover 11E and includes a peripheral wall portion covering the periphery of the left and right side surfaces of the switch push portion 19b.

  Thus, according to the terminal cover 11E of Example 5, by providing the rib 115 around the switch push portion 19b, a malicious third party cannot operate the switch push portion 19b. Therefore, it is possible to take measures against the mischief against malicious third parties.

  FIG. 6A is a schematic configuration diagram illustrating a state in which the switch push portion 19e having an enlarged switch contact area is attached to the spring 21 and stored in the terminal cover 11F in the watt-hour meter according to the sixth embodiment of the present invention. . FIG. 6B is an exploded perspective view of the switch push portion 19e, the spring 21, and the terminal cover 11F.

  The switch push portion 19e includes a flat plate having a switch contact area set to a predetermined area or more and a rotation prevention rib 22. The other configuration shown in FIG. 6 is the same as the configuration shown in FIG.

  As described above, the switch push portion 19e has a switch contact area set to a predetermined area or more. Therefore, when the terminal cover 11F is attached to the case 10, the switch push portion 19e comes into contact with the switch portion 18 to vibrate, Even when an impact is applied, the ON operation of the switch unit 18 can be maintained.

  In addition, this invention is not limited to the watt-hour meter of Example 1 thru | or Example 6 mentioned above. In the first to sixth embodiments, one switch unit 18 is provided. However, for example, a plurality of switch units 18 may be provided, and a plurality of switch push units 19 may be provided according to the number of switch units 18. .

  Further, two or more embodiments of the watt hour meter according to Embodiments 1 to 6 may be combined. In this way, the effect is further increased.

10 Case 11, 11A, 11B, 11C, 11D, 11E, 11F Terminal cover 11a Step portion 11b, 11c Projection portion 11d, 11e Groove portion 13 Base 14 Circuit portion 15 Display portion 16 Conductor portion 17 Sensor portion 18 Switch portions 19, 19a, 19b, 19c, 19d, 19e Switch push part 20, 20a Protrusion part 21 Spring 22 Anti-rotation rib 110, 113 Spring storage part 111 Hole part 112 Taper part 114 Guide part 115 Rib 191, 192, 193 Leg part 194 Connecting part 195 196 nails

Claims (6)

A case for storing a terminal portion for fixing the power distribution line;
A terminal cover that covers the terminal part and is attached to the case;
A switch part provided in the case;
A plate-like switch push part that is integrally formed with the terminal cover and has a spring property, and a projection part is formed and the projection part pushes the switch part when the terminal cover is attached to the case;
A watt-hour meter comprising: A case for storing a terminal portion for fixing the power distribution line;
A terminal cover that covers the terminal part and is attached to the case;
A switch part provided in the case;
It has a spring property, and a protrusion and a claw are formed, and when the terminal cover is attached to the case, the protrusion includes a switch push part that presses the switch part,
A watt-hour meter, wherein the terminal cover is formed with a groove portion that fits into the claw portion for attaching the switch push portion. A case for storing a terminal portion for fixing the power distribution line;
A terminal cover that covers the terminal part and is attached to the case;
A switch part provided in the case;
A switch push part that forms a convex part and the convex part pushes the switch part when the terminal cover is attached to the case;
A coil spring with one end attached to the protruding portion of the convex portion of the switch push portion;
A watt-hour meter characterized in that the terminal cover is formed with a spring accommodating portion comprising a recess for accommodating the coil spring.   The watt-hour meter according to claim 2, wherein the switch push portion includes a rib for preventing rotation.   The watt-hour meter according to claim 1, wherein a peripheral wall portion is provided around the switch push portion. The watt-hour meter according to any one of claims 1 to 5, wherein a plurality of the switch push units are provided according to the number of the switch units.

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