JP7281390B2 - electricity meter - Google Patents

Description

The present invention relates to a watt hour meter.

A conventional watt-hour meter includes a metering device, a communication device attached to the metering device and transmitting the amount of power metered by the metering device to the outside, a terminal block, and a cover.

FIG. 22 is a perspective view of a conventional watt-hour meter. 22(a) and 22(b) show the appearance of the watt-hour meter, FIG. 22(c) shows the communication device attached to the base 4 with the cover 11 removed, and FIG. The state in which the communication device is removed is shown. 23(a) shows the weighing device removed from the installed terminal block 10, and FIG. 23(b) shows the weighing device attached to the terminal block 10 and installed. FIG. 24(a) shows the appearance of a conventional communication device for a power meter, and FIG. 24(b) shows a metering device mounting portion 13b provided in the communication device. 25 and 26 show exploded views of conventional metering devices for electric energy meters.

As shown in FIGS. 25 and 26, the weighing device comprises a circuit section 1 having a display section 1a for displaying electric energy and a communication device connection section 1b, a circuit connection section 3a for supplying power to the circuit section, and a terminal block 10. A conductor 3 having a terminal connection portion 3b connected to a terminal 9, an opening/closing portion 3c for short-circuiting and opening the conductor 3, a sensor portion 2 for detecting current flowing through the conductor 3, and a communication device connection portion through hole 4a. It is composed of a base 4 having a communication device mounting portion 4b and a terminal block mounting portion 4c, and a case 5 for housing them.

As shown in FIG. 27, the opening/closing portion 3c has a basic configuration including a primary conductor portion 3ca, a secondary conductor portion 3cb, a short circuit portion 3cc for shorting the primary conductor portion 3ca and the secondary conductor portion 3cb, and a short circuit. A movable portion 3cd made of a magnetic material serving as an axis for moving the portion 3cc, an insulating portion 3ck for insulating between the short-circuit portion 3cc and the movable portion 3cd, a spring 3ce for pressing the insulating portion 3ck and the short-circuit portion 3cc to maintain the short-circuited state, movable A coil 3cf for driving the portion 3cd, a switching portion terminal 3cg for applying a current to the coil 3cf, a magnet 3ch for fixing the movable portion 3cd and maintaining the short-circuit portion 3cc in an open state, a magnetic body 3ci covering the coil 3cf, the entire It has a case 3cj covering the .

Further, as for the movable method of the contact portion of the opening/closing portion 3c, there are three types, namely, the pushing method shown in FIG. 27, the plate spring method shown in FIG. 28, and the sliding method shown in FIG.

In the push-in method, a conductor short-circuit portion 3cc is provided at the tip of the movable portion 3cd of the opening/closing portion 3c through an insulating portion 3ck of an insulator. , a current flows through the coil 3cf from the opening/closing terminal 3cg to generate a magnetomotive force, which cancels the magnetic force of the magnet 3ch that maintains the short-circuiting portion 3cc in an open state. The portion 3cc is pressed, and the short circuit portion 3cc abuts on the primary conductor portion 3ca and the secondary conductor portion 3cb, thereby short-circuiting. 27(b) in the short-circuited state to the open state in FIG. The spring force of the spring 3ce that maintains 3cc in the short-circuited state is canceled, and the movable portion 3cd is fixed by the magnet 3ch to maintain the short-circuited portion 3cc in the open state.

In the leaf spring method, the transition between the open state and the short circuit state is the same as the pushing method, but the short circuit portion is the leaf spring 3cl, and in the open state, one end 3 cm of the leaf spring 3cl is connected to the primary conductor portion 3ca. It is fixed, and the other end 3cn is separated from the secondary conductor 3cb. When transitioning from the open state of FIG. 28A to the shorted state of FIG. A short circuit is caused by contacting the When transitioning from the short-circuited state of FIG. 28B to the open state of FIG. 3cb away, it will be in an open state.

In the sliding method, the movable direction of the movable portion 3cd of the opening/closing portion is parallel to the primary side conductor portion 3ca and the secondary side conductor portion 3cb, the insulating portion 3cO has a rectangular shape, and the short circuit portion 3cc is connected to the insulating portion 3ck. It is fixed to the part parallel to the conductor. In the open state, the short-circuit portion 3cc is in contact with the primary conductor portion 3ca and separated from the secondary conductor portion 3cb. When the open state of FIG. 29A changes to the shorted state of FIG. Short-circuit by touching. When transitioning from the shorted state in FIG. 29(b) to the open state in FIG. 29(a), the insulating portion 3ck is pulled so that the shorted portion 3cc is separated from the secondary conductor portion 3cb to be in the open state.

The communication device, as shown in FIG. 24, has a weighing device connecting portion 13a and a weighing device mounting portion 13b.

As shown in FIGS. 25 and 26, the terminal block includes terminal block mounting screws 6, conductor connecting screws 7, wire mounting screws 8, terminals 9, base mounting portions 10a, cover mounting portions 10b, and wire through holes 10c. It consists of a block 10 with

The cover is composed of a cover 11 and cover mounting screws 12, as shown in FIG. The terminal connection portion 3b of the metering device is fixed to the terminal 9 by the conductor connection screw 7 of the terminal block, and the terminal block mounting portion 4c of the metering device is fixed to the base mounting portion 10a of the terminal block by the terminal block mounting screw 6. This allows the metering device to be attached to the terminal block.

After that, the weighing device mounting portion 13b of the communication device is fitted into the communication device mounting portion 4b of the base 4 of the weighing device, and the weighing device connecting portion 13a of the communication device is inserted into the communication device connecting portion through hole of the base 4 of the weighing device. 4a to connect to the communication device connection portion 1b of the circuit portion 1, and attach the cover mounting screw 12 provided on the cover 11 to the cover mounting portion 10b of the block 10, thereby assembling the watt hour meter (Fig. 22-FIG. 29).

When replacing the metering device by reusing the installed terminal block, loosen the terminal block mounting screw 6 and the conductor connection screw 7 of the terminal block, remove the old metering device installed, and attach the new metering device to the terminal block. After mounting, it is necessary to tighten the terminal block mounting screws 6 and the conductor connecting screws 7 to fix them.

As a conventional technology, there is a watt-hour meter that can easily and safely attach and detach a power supply control device without the need to remove the power supply side power supply conductor and the load side power supply conductor connected to the terminal block. (Patent document 1). As for the structure of the sensor, there is a structure that can be divided and attached by sliding (Patent Document 2).

Japanese Patent No. 4991340 Japanese Patent No. 5731876

However, when replacing the watt-hour meter, the terminal block mounting screw 6 and the conductor connection screw 7 are loosened to remove the old metering device attached, and after the new metering device is placed on the terminal block, the terminal block mounting screw 6 and the conductor are connected. It was necessary to tighten the screw 7 to fix it.

There is a need to loosen and tighten the screws, which may increase costs due to longer work hours and cause malfunctions due to forgetting to tighten the screws. Also, when the metering device is attached to the terminal block, the terminal connection portion 3b of the metering device may cause a short circuit between different polarity terminals of the terminal block.

SUMMARY OF THE INVENTION An object of the present invention is to provide a watt-hour meter that eliminates the work of attaching conductor connection screws when replacing the watt-hour meter, improves workability when attaching a metering device, suppresses the occurrence of malfunctions, and prevents short circuits.

In order to solve the above-mentioned problems, claim 1 of the present invention provides a metering device that has a case and a base and measures the amount of electric power, and a metering device that is attached to the metering device and transmits the power amount measured by the metering device to the outside. a terminal block attached to the weighing device and connected to an electric wire; and a cover covering the weighing device, the communication device, and the terminal block, wherein the terminal block includes a magnetic material insertion hole, It has a block cover with a voltage terminal abutting hole and an opening/closing portion terminal abutting hole, and an opening/closing portion having an opening/closing portion terminal for short-circuiting and opening a conductor. , an opening/closing unit connection terminal, a sensor main body, a movable case magnetic body, a base magnetic body, a movable case magnetic body fixing part for fixing the movable case magnetic body, and a hook, and a movable case for the base. A magnetic body fixing part for a base for fixing a magnetic body, a movable case sliding mounting part to which a movable case can be attached and slidable, and a movable case fixing part that has a snap-fit structure and fixes the movable case in the open or closed position. part, sensor fixing part, voltage connection terminal hole, opening/closing part connection terminal hole, terminal block insertion rib, and guides the terminal block insertion rib when the weighing device is attached to the terminal block. and insert the weighing device into the terminal block, the base magnetic fixing part is inserted into the magnetic body insertion hole, and the tip of the voltage connection terminal inserted into the voltage connection terminal hole is inserted into the voltage terminal abutment hole The tip of the switching section connection terminal inserted into the switching section connection terminal contact hole contacts the switching section terminal through the opening for switching section terminal abutment. power is supplied from the circuit section to operate the opening and closing section, and the pressing section for unlocking the movable case fixing section of the base is pushed to remove the upper surface of the convex section of the movable case fixing section from the lower surface of the hook section of the hook section. The open state of the movable case is released by sliding the movable case, and the lower surface of the convex portion of the movable case fixing portion hooks on the upper surface of the hooking portion of the hooking portion to fix the movable case in the closed state, and the circumference of the conductor is fixed as described above. The current measurement is performed by covering the main body of the sensor, the magnetic material for the base, and the magnetic material for the movable case.

The invention according to claim 2 is characterized in that the opening/closing part is composed of a drive part and a movable part, the drive part is provided in the weighing device, and the movable part is provided in the terminal block.

In the third aspect of the present invention, the movable portion is composed of a driving movable portion movable within the driving portion and a short-circuiting movable portion having a short-circuiting portion. It is characterized by being provided in a block.

According to a fourth aspect of the present invention, the terminal block has a block cover having a plurality of voltage terminal abutting holes, and has an opening/closing portion having a plurality of short-circuiting portions. A movable case including a connection terminal, a plurality of sensor bodies, a plurality of movable case magnetic bodies, a plurality of base magnetic bodies, and a plurality of movable case magnetic body fixing portions, and a plurality of fixed magnetic bodies for the base and a base having a plurality of holes for voltage connection terminals, so that current measurement corresponding to a plurality of terminals can be performed.

According to the fifth aspect of the invention, the base is provided with a sealing portion in which a sealing part is embedded, and the movable case is provided with a sealing part through-hole. is passed through the sealing part through-hole, and sealing is performed by attaching a sealing cap to the tip portion of the sealing part.

According to the invention of claim 1, since the work of attaching the conductor connection screw when replacing the electricity meter is eliminated, the workability of the electricity meter mounting work is improved, the occurrence of malfunctions is suppressed, and the short circuit is prevented. can do. In addition, even if the weighing device is removed from the terminal block, the terminal block alone can maintain the energized state, so electricity can be used without causing a power outage on the secondary wiring side.

According to the invention of claim 2, since the driving part is inside the weighing device, the driving part can be replaced together with the weighing device.

According to the invention of claim 3, since the end of the movable portion does not protrude from the surface of the block cover, the risk of damaging the short-circuit movable portion is reduced, and workability in mounting the watt-hour meter can be improved.

According to claim 4, the watt-hour meter can be assembled even if there are a plurality of electric wires. In addition, since the operation of attaching a plurality of conductor connection screws 7 is eliminated, the workability of the electricity meter attaching operation can be improved.

According to claim 5, since the sensor section can be sealed, it is possible to prevent tampering.

FIG. 4 is a process diagram showing a procedure for assembling the metering device and the terminal block of the watt-hour meter according to the first embodiment of the present invention; 1. It is an enlarged view of the figure which shows the state transition regarding attachment to the movable case of the watt-hour meter shown in FIG. FIG. 2 is a cross-sectional view of the metering device and blocks of the watt-hour meter shown in FIG. 1 ; FIG. 2 is a cross-sectional view of the metering device and blocks of the watt-hour meter shown in FIG. 1 ; 2 is a configuration diagram of a base of the watt-hour meter shown in FIG. 1. FIG. FIG. 2 is a detailed view of a movable case of the watt-hour meter shown in FIG. 1; 2 is an exploded view of the metering device of the electricity meter shown in FIG. 1; FIG. 2 is a configuration diagram of a terminal block of the watt-hour meter shown in FIG. 1; FIG. 2 is an exploded view of a terminal block of the watt hour meter shown in FIG. 1; FIG. FIG. 2 is a cross-sectional view of an opening/closing portion of the watt-hour meter shown in FIG. 1 when it is turned on and off; FIG. 7 is a cross-sectional view of the opening/closing portion of the watt-hour meter according to the second embodiment of the present invention when it is turned on and off; FIG. 11 is a cross-sectional view of the opening/closing portion of the watt-hour meter according to the third embodiment of the present invention when the opening/closing portion is turned on and off; 13 is an exploded view of the terminal block of the watt hour meter shown in FIG. 12; FIG. It is process drawing which showed the procedure which assembles the metering device and terminal block of the watt-hour meter based on the 4th Embodiment of this invention. 15 is a configuration diagram of the base of the watt hour meter shown in FIG. 14. FIG. FIG. 15 is a detailed view of a movable case of the watt-hour meter shown in FIG. 14; FIG. 15 is a cross-sectional view of the opening/closing portion of the watt-hour meter shown in FIG. 14 when it is turned on and off; 15 is an exploded view of the terminal block of the watt hour meter shown in FIG. 14; FIG. It is process drawing which showed the procedure which assembles the metering device and terminal block of the watt-hour meter based on the 5th Embodiment of this invention. FIG. 20 is a detailed view of the base of the electricity meter shown in FIG. 19; FIG. 20 is a detailed view of a movable case of the watt-hour meter shown in FIG. 19; 1 is a perspective view of a conventional watt-hour meter; FIG. FIG. 11 is a perspective view of a conventional watt-hour metering device in an attached state; 1 is a perspective view of a conventional watt-hour meter communication device; FIG. 1 is an exploded view of a conventional electricity meter metering device; FIG. 1 is an exploded view of a conventional electricity meter metering device; FIG. FIG. 10 is a cross-sectional view of a push-type opening/closing part of a conventional watt-hour meter. FIG. 2 is a cross-sectional view of a plate spring type opening/closing part of a conventional metering device for an electric energy meter; FIG. 10 is a cross-sectional view of a slide-type opening/closing part of a conventional metering device for an electric energy meter;

A power meter according to an embodiment of the present invention will be described in detail below with reference to the drawings.

(First embodiment)
FIG. 1 is a process diagram showing a procedure for assembling a metering device and a terminal block of a power meter according to the first embodiment of the present invention. FIG. 1(a) is a diagram showing the direction in which the metering device is attached to the terminal block. FIG. 1(b) is a diagram showing a state in which the weighing device is attached to the terminal block. FIG. 1(c) to FIG. 1(e) are diagrams showing state transitions regarding attachment of the movable case.

FIGS. 2(a) to 2(d) are enlarged diagrams showing state transitions regarding attachment of the movable case of the watt-hour meter shown in FIGS. 1(b) to 1(e). 3(a) and 3(b) are cross-sectional views of FIGS. 1(a) and 1(b). 4(a) to 4(c) are sectional views of FIGS. 1(c) to 1(e). FIG. 5(a) shows the inside of the weighing device with the case removed, FIG. 5(b) shows the view from the terminal block insertion side of the weighing device with the case removed, and FIG. 5(d) shows the base 4A. 6A and 6B are detailed diagrams of the movable case 105. FIG. FIG. 7 shows an exploded view of the metering device. FIG. 8 shows a terminal block. FIG. 9 shows an exploded view of the terminal block. 10(a) and 10(b) are partial cross-sectional views showing state transitions of the opening/closing portion.
As shown in FIG. 1, the watt-hour meter comprises a metering device having a case 5A and a base 4A, a communication device (not shown) having an upper case 14 and a lower case 13 as shown in FIG. It has a cover as shown at 22 and a terminal block with a block cover 106 . As shown in FIG. 7, the weighing device includes a voltage connection terminal 103, a switch section connection terminal 104, a sensor body 2A, a movable case magnetic body 101, a base magnetic body 102, a movable case 105, a base 4A, a circuit section 1, It has a case 5A, and as shown in FIG. 4(c), a sensor main body 2A, a movable case magnetic body 101, and a base magnetic body 102 cover the periphery of the sensor conductor portion 9Ac of the terminal 9A1. can be measured. The sensor main body 2A is attached to the sensor main body fixing portion 4A12 of the base 4A, but may be attached to the movable case 105 as well.

As shown in FIGS. 3(a) and 6(a) to 6(b), the movable case 105 includes a movable case magnetic body fixing portion 105f for fixing the movable case magnetic body 101, a lifting portion 105a, and a hook. It has a portion 105b and a sliding portion 105e. Moreover, the hooking portion 105b has a hooking portion upper surface 105c and a hooking portion lower surface 105d. As shown in FIGS. 3(a) and 5(c) to 5(d), the base 4A has a fixing release pressing portion 4A2 having a snap-fit structure in the center, a lifting portion insertion hole portion 4A11, and left and right A movable case fixing portion 4A1 having a movable case fixing convex portion 4A3, a base magnetic substance fixing portion 4A6 for fixing the base magnetic substance 102, a terminal block insertion rib 4A7, and a sliding portion 105e of the movable case 105 are attached and slid. Possible movable case sliding mounting portion 4A8, opening/closing portion connection terminal hole portion 4A9, voltage connection terminal hole portion 4A10, sensor body fixing portion 4A12, communication device connection portion through hole 4Aa, communication device mounting portion 4Ab, terminal block mounting A part 4Ac is provided. In addition, the movable case fixing convex portion 4A3 has a convex upper surface 4A4 and a convex lower surface 4A5. Further, the movable case fixing portion 4A1 is provided on the base 4A, but it may be provided on the movable case 105 as well.

As shown in FIGS. 8 and 9, the terminal block includes a block cover having a recess 106a for inserting a magnetic body, a hole 106b for contacting a voltage terminal, a hole 106c for contacting a terminal of an opening/closing part, and a hole 106d for mounting a block. 106, an opening/closing portion 3cA having an opening/closing portion terminal 3cAg for short-circuiting and opening the terminals, a base mounting portion 10Aa, a cover mounting portion 10Ab, an electric wire insertion hole 10Ac, a block cover mounting projection 10Ad, and a magnetic fixing portion recess 10Ae. Block 10A provided, primary side conductor portion 9Aa, secondary side conductor portion 9Ab, sensor conductor portion 9Ac corresponding to part of primary side conductor portion 9Aa, terminal 9A1 provided with voltage connection terminal contact portion 9Ad, voltage connection terminal contact portion It has a terminal 9A2 with 9Ad, a terminal block mounting screw 6, and a wire mounting screw 8. Moreover, although the sensor conductor portion 9Ac of the terminal 9A1 is provided on the primary side conductor portion 9Aa, it may be provided on the secondary side conductor portion 9Ab.

Next, the operation of the watt-hour meter according to the first embodiment configured as described above will be described. First, state transitions shown in FIGS. 1(a) to 1(b) and FIGS. 3(a) to 3(b) will be described.

When the weighing device is attached to the terminal block, the portion of the terminal block covered by the block cover 106 is inserted using the terminal block insertion rib 4A7 as a guide. and the magnetic body insertion hole 106e, which is a space sandwiched between the magnetic body insertion recess 106a and the sensor conductor 9Ac of the terminal 9A1.

At the same time, the tip of the voltage connection terminal 103 inserted into the voltage connection terminal hole 4A10 of the base 4A of the weighing device penetrates the voltage terminal abutting hole 106b of the block cover 106 of the terminal block to connect the terminal 9A1 and the terminal. It abuts on the voltage connection terminal abutting portion 9Ad of 9A2. Due to this contact, power can be supplied to the circuit section 1 to operate the circuit.

At the same time, the tip of the opening/closing portion connection terminal 104 inserted into the opening/closing portion connection terminal hole portion 4A9 of the base 4A of the weighing device passes through the opening/closing portion terminal abutting hole portion 106c of the block cover 106 of the terminal block to open and close. It abuts on the switching portion terminal 3cAg of the portion 3cA. This abutment allows power to be supplied from the circuit section 1 to the switching section terminal 3cAg through the switching section connection terminal 104 to operate the switching section 3cA.

Next, state transitions shown in FIGS. 1(b) to 1(c), FIGS. 2(a) to 2(b), and FIGS. 3(b) to 4(a) will be described.

Pushing the pressing portion 4A2 for releasing fixation of the base 4A in the direction of S1, the upper surface 4A4 of the convex portion of the movable case fixing portion 4A1 is removed from the lower surface 105d of the hooking portion 105b of the movable case 105, and the movable case 105 is opened. Unlock.

Next, state transitions shown in FIGS. 1(c) to 1(d), FIGS. 2(b) to 2(c), and FIGS. 4(a) to 4(b) will be described.

The movable case 105 is pushed and slid in the direction of S2 while pushing the fixing release pressing portion 4A2 of the base 4A.

Next, state transitions shown in FIGS. 1(d) to 1(e), FIGS. 2(c) to 2(d), and FIGS. 4(c) to 4(c) will be described.

The lower convex surface 4A5 of the movable case fixing portion 4A1 is engaged with the upper surface 105c of the engaging portion 105b of the movable case 105, whereby the movable case 105 can be fixed in the closed state. When the movable case 105 is closed, the movable case magnetic body 101 contacts the base magnetic body 102, and the sensor main body 2A, the movable case magnetic body 101, and the base magnetic body 102 form the sensor conductor of the terminal 9A1. The current can be measured by covering the portion 9Ac.

Finally, the mounting of the weighing device is completed by tightening the weighing unit mounting screw 6 . Also, how to remove the metering device from the terminal block is described below.

Pressing the pressing portion 4A2 for releasing fixation of the base 4A in the direction of S1 removes the lower convex surface 4A5 of the movable case fixing portion 4A1 from the upper surface 105c of the hook portion of the movable case 105, thereby releasing the fixed state of the movable case 105 in the closed state. .

While pushing the fixing release pressing portion 4A2 of the base 4A, the lifting portion 105a of the movable case 105 is lifted with a finger to slide the movable case 105. As shown in FIG.

The movable case 5A1 can be fixed in the open state by hooking the upper surface 4A4 of the convex portion of the movable case fixing portion 4A1 on the lower surface 105d of the hooking portion of the hooking portion 105b of the movable case 105. Now, the movable case magnetic body 101 is separated from the base magnetic body 102. Finally, the weighing device can be removed by loosening the weighing unit mounting screws.

FIG. 10(a) is a cross-sectional view of the push-type open/close unit 3cA of the watt-hour meter shown in FIG. 1 in a short-circuit state (ON). FIG. 10(b) is a cross-sectional view of the push-type open/close unit 3cA of the watt-hour meter shown in FIG. 1 when it is in an open state (OFF). The opening/closing portion 3cA includes a movable portion 3cAd, a short-circuit portion 3cAc, and a spring 3cAe.

In FIG. 10(a), the short-circuiting portion 3cAc abuts the primary-side conductor portion 9Aa and the secondary-side conductor portion 9Ab, and is in a short-circuited state. In FIG. 10B, the short circuit portion 3cAc is separated from the primary conductor portion 9Aa and the secondary conductor portion 9Ab and is in an open state.

In addition, there are three types of methods for moving the contact portion of the opening/closing portion 3cA: a pushing method, a leaf spring method, and a sliding method, and any of these methods can be used.

According to the watt-hour meter of the first embodiment configured in this way, the work of attaching the conductor connection screw 7 is eliminated when replacing the watt-hour meter. It is possible to suppress the occurrence of defects and prevent short circuits. In addition, even if the weighing device is removed from the terminal block, the terminal block alone can maintain the energized state, so electricity can be used without causing a power outage on the secondary wiring side.

(Second embodiment)
FIG. 11 is a partial cross-sectional view of a watt-hour meter according to a second embodiment of the present invention. FIG. 11(a) is a partial cross-sectional view of the opening/closing portion 3cB in a short-circuited state (on). FIG. 11(b) is a cross-sectional view of the opening/closing portion 3cB in the open state (OFF). A watt-hour meter according to the second embodiment is different from the watt-hour meter according to the first embodiment in that a movable portion 3cBd, a short-circuit portion 3cBc, a spring 3cBe, and an insulating portion 3cBk of an opening/closing portion are provided in a terminal block. The coil 3cBf, the magnet 3cBh, the opening/closing terminal 3cBg, and the magnetic body 3cBi are combined to form a driving portion 3cB1, which is provided in the weighing device. Further, the base 4B of the weighing device is provided with a movable portion insertion hole 4B13, and the block cover 206 is provided with a movable portion through hole 206c. In the terminal block alone, the short-circuiting portion 3cBc, the spring 3cBe, and the insulating portion 3cBk are housed in a portion surrounded by the block cover 206, the terminal block, the primary side conductor portion 9Ba, and the secondary side conductor portion 9Bb. , the short-circuit portion 3cBc is pressed by the spring 3cBe via the insulating portion 3cBk, and contacts the primary-side conductor portion 9Ba and the secondary-side conductor portion 9Bb to be in a short-circuited state. An end portion 3cBda of the movable portion 3cBd on the side opposite to the short-circuit portion 3cBc protrudes to the outside from the movable portion through-hole 206c.

When the weighing device and the terminal block are assembled, the end portion 3cBda of the movable portion 3cBd protruding outside passes through the movable portion insertion hole 4B13 of the base 4B and is inserted into the movable portion accommodating portion 3cB2 in the driving portion 3cB1.

In order to make a transition from the short-circuited state of FIG. 11A to the open state of FIG. , the short-circuiting portion 3cBc separates the primary-side conductor portion 9Ba and the secondary-side conductor portion 9Bb to maintain the open state.

In order to make a transition from the open state of FIG. 11B to the shorted state of FIG. The short circuit portion 3cBc is pressed by the spring 3cBe through the insulating portion 3cBk, and the short circuit portion 3cBc contacts the primary conductor portion 9Ba and the secondary conductor portion 9Bb to maintain the short circuit state.

According to the watt-hour meter of the second embodiment configured in this manner, since the driving section 3cB1 is inside the weighing device, the driving section 3cB1 can be replaced together with the weighing device.

(Third embodiment)
FIG. 12 is a partial cross-sectional view of a power meter according to a third embodiment of the invention. FIG. 12(a) is a partial cross-sectional view when the opening/closing portion 3cC is in a short-circuited state (on). FIG. 12(b) is a cross-sectional view of the opening/closing portion 3cC in the open state (OFF). 13 is an exploded view of the terminal block of the electricity meter shown in FIG. 12. FIG.

A power meter according to the third embodiment is different from the power meter according to the second embodiment in that the movable part of the opening/closing part is a magnetic driving movable part that is movable within the driving part provided on the metering device side. 3cCd and an insulating short-circuit movable portion 308 provided on the terminal block side. In the weighing device, a movable driving portion 3cCd, a driving portion 3cC1 including a spring 307, and a movable portion insertion hole 4C13 are provided in the base 4C. It is inserted into the movable part storage part 3cC2 and fixed by a magnet 3cCh. Further, the contact side end 3cCdb of the drive movable part 3cCd passes through the movable part insertion hole 4C13, and the surface of the base 4C and the contact side end 3cCdb of the drive movable part 3cCd are flush with each other. On the terminal block side, the block cover 306 is provided with a movable portion through-hole 306c, and the short-circuiting portion 3cCc, the spring 307, and the insulating portion 3cCk are surrounded by the block 10C, the primary side conductor portion 9Ca, and the secondary side conductor portion 9Cb. In the initial state, the short-circuiting portion 3cCc is pressed by the spring 307 through the insulating portion 3cCk and contacts the primary-side conductor portion 9Ca and the secondary-side conductor portion 9Cb to be short-circuited. The contact side end portion 308a of the short-circuit movable portion 308 passes through the movable portion through hole 306c, and the surface of the block cover 306 and the contact side end portion 308a of the short-circuit movable portion 308 are flush with each other.

When the weighing device and the terminal block are assembled, the contact side end 3cCdb of the driving movable part 3cCd in the movable part insertion hole 4C13 faces the contact side end 308a of the short-circuiting movable part 308 in the movable part through hole 306c. are doing.

In order to make a transition from the short-circuited state in FIG. 12A to the open state in FIG. contact-side end 3cCdb contacts and pushes down contact-side end 308a of short-circuit movable portion 308, and drive movable portion 3cCd is pressed by spring 3cCe, so that short-circuit portion 3cCc is connected to primary conductor portion 9Ca and secondary conductor 9Ca. The open state is maintained apart from the side conductor portion 9Cb.

In order to make a transition from the open state of FIG. 12B to the shorted state of FIG. By fixing the driving side end portion 3cCda with a magnet 3cCh, the spring force of the spring 3cCe is not applied to the short-circuiting movable portion 308 side, and the short-circuiting movable portion 308 including the short-circuiting portion 3cCc is pressed by the spring 307 to cause a short-circuiting. The portion 3cCc contacts the primary side conductor portion 9Ca and the secondary side conductor portion 9Cb to maintain the short circuit state. Here, the spring force of the spring 3cCe>307.

According to the watt-hour meter according to the third embodiment configured as described above, since the end of the short-circuit movable part 308 does not protrude from the surface of the block cover 306, the risk of damaging the short-circuit movable part 308 is reduced. It is possible to improve the workability of the meter mounting work.

(Fourth embodiment)
FIG. 14 is a process diagram showing the procedure for assembling the metering device and the terminal block of the watt-hour meter according to the fourth embodiment of the present invention. FIG. 14(a) is a diagram showing the direction of mounting the metering device to the terminal block. FIG. 14(b) is a diagram showing a state in which the weighing device is attached to the terminal block. FIG. 14(c) is a diagram showing a state in which the movable case is attached. FIG. 14(d) to FIG. 14(e) are diagrams showing state transitions regarding attachment of the movable case. FIG. 15(a) shows the inside of the weighing device with the case removed, FIG. 15(b) shows the view from the terminal block insertion side of the weighing device with the case removed, and FIG. 15(d) shows the base 4D. FIG. 16 is a detailed view of the movable case 405. FIG.

17(a) and 17(b) are partial cross-sectional views showing state transitions of the opening/closing portion. FIG. 18 is an exploded view of the terminal block. Compared to the watt-hour meter according to the third embodiment, the watt-hour meter according to the fourth embodiment has one more terminal that serves as an electric circuit in the terminal block. The base magnetic body 102, the movable case magnetic body 101, and the sensor body 2D are increased by one, and the base 4D has one voltage connection terminal hole 4D10, one base magnetic body fixing part 4D6, and one sensor body fixing part 4D12. As a result, in the movable case 405, the number of movable case magnetic body fixing portions 405f is increased by one. Two movable case magnetic bodies 101 can be attached to the movable case 405, and the operation is the same as that described in the first embodiment.

In the terminal block, one more terminal 9D2, one more spring 407, and one more short-circuiting portion 3cDc, and one more voltage terminal abutting hole 406b and one more magnetic material insertion recess 406a in the block cover. Two short-circuiting portions 3cDc are attached to the short-circuiting movable portion 408 of the opening/closing portion 3cD to simultaneously short-circuit and open the primary side terminals 9D1a and 9D2a of the terminals 9D1 and 9D2 and the secondary side terminals 9D1b and 9D2b. be able to. The operation is the same as that explained in the third embodiment.

In this embodiment, it is possible to measure the current of two electric circuits and to open and close the circuit by opening and closing parts. Multiple magnetic body fixing parts for the movable case are provided, multiple magnetic body fixing parts for the base and sensor main body fixing parts are provided on the base, multiple short-circuit parts are attached to the insulating part of the opening/closing part, and multiple terminals are attached to the terminal block. By providing it, it becomes possible to measure the current of a plurality of electric circuits and to perform short-circuiting and opening by means of the switching section. Also, in this embodiment, the opening/closing portion was described in accordance with the third embodiment, but the opening/closing portion described in the first and second embodiments can also be used.

According to the watt-hour meter according to the fourth embodiment configured in this way, the watt-hour meter can be assembled even if there are a plurality of electric wires. In addition, since the operation of attaching a plurality of conductor connection screws 7 is eliminated, the workability of the electricity meter attaching operation can be improved.

(Fifth embodiment)
FIG. 19 is a process diagram showing the procedure for assembling the metering device and the terminal block of the watt-hour meter according to the fifth embodiment of the present invention. FIG. 19(a) is a diagram showing the direction of mounting the metering device to the terminal block. FIG. 19(b) is a diagram showing a state in which the weighing device is attached to the terminal block. FIG. 19(c) is a diagram showing a state in which the movable case 505 is attached. FIG. 19(d) shows the sealing part 509 sealed with a sealing cap 510. FIG. FIG. 20 is a detailed view of the base 4E. FIG. 21 is a detailed view of the movable case 505. FIG.

As shown in FIG. 20, the base 4E has a movable case fixing portion 4E1, a movable case fixing convex portion 4E3, a convex upper surface 4E4, a convex lower surface 4E5, and a terminal block having the same configuration as that shown in FIG. 5(c). An insertion rib 4E7 and the like, a movable case recess 4E14 for accommodating a movable case connecting portion to the sealing component 509, and a sealing portion 4E15 in which the sealing component 509 is embedded are provided.

As shown in FIG. 21, the movable case 505 includes a lifting portion 505a having the same configuration as that shown in FIG. A case magnetic fixing portion 505f, a movable case transition portion 505g extending to the sealing portion through-hole, and a sealing portion through-hole 505h are provided.

According to the watt-hour meter of the fifth embodiment configured as described above, when the movable case 505 is slid from the open state to the closed state, the sealing part 509 is inserted into the sealing portion through-hole of the movable case 505. 505h and a sealing cap 510 is attached to the tip of the sealing part 509 for sealing. Also, since the sensor section can be sealed, it is possible to prevent tampering.

1, 1A Circuit portion 1a Display portion 1b Communication device connection portion 2 Sensor portion 2A Sensor body 3 Conductor 3a Circuit connection portion 3b Terminal connection portions 3c, 3cA, 3cB, 3cC, 3cD Switching portion 3ca Primary side conductor portion 3cb Secondary side conductor Portions 3cc, 3cAc, 3cBc, 3cCc, 3cDc Short-circuiting portions 3cd, 3cAd, 3cBd Movable portion 3cDd Driving movable portions 3ce, 3cAe, 3cBe, 3cCe, 307, 3cDe, 407 Spring 3cf Coils 3cg, 3cAg, 3cBg Switching portion terminals 3ch, 3cBh , 3cCh magnet 3ci magnetic body 3cj case 3ck, 3cO, 3cAk, 3cBk, 3cCk, 3cDk insulating portion 3cl plate spring 3cm, 3cn one side end 3cB1, 3cC1, 3cD1 driving portion 3cB2, 3cC2 movable portion housing portion 3cBda end portion 3cCd driving movable Portion 3cCda Drive side end 3cCdb Contact side end 4, 4A, 4B, 4C, 4D, 4E Base 4A1, 4D1, 4E1 Movable case fixing part 4A2, 4E2 Unlocking pressing part 4A3, 4D3, 4E3 For fixing movable case Projection 4A4, 4D4, 4E4 Projection upper surface 4A5, 4D5, 4E5 Projection lower surface 4A6, 4D6 Base magnetic fixing part 4A7, 4D7, 4E7 Terminal block insertion rib 4A8, 4D8 Movable case sliding mounting part
4A9 Switching section connection terminal holes 4A10, 4D10 Voltage connection terminal holes 4A11, 4D11 Lifting section insertion holes 4A12, 4D12 Sensor body fixing sections 4B13, 4C13, 4D13 Movable section insertion hole 4E14 Movable case recess 4E15 Seal section 4a, 4Aa Communication device connection part through holes 4b, 4Ab Communication device attachment parts 4c, 4Ac Terminal block attachment part 4C13 Movable part insertion holes 5, 5A, 5B, 5C, 5D, 5E Case 6 Terminal block attachment screw 7 Conductor connection screw 8 Wire mounting screws 9, 9A1, 9A2, 9B1, 9B2, 9C1, 9C2, 9D1, 9D2, 9D3 Terminals 9Aa, 9Ba, 9Ca, 9D1a, 9D2a Primary side conductors 9Ab, 9Bb, 9Cb, 9D1b, 9D2b Secondary side conductors 9Ac, 9Cc, 9D1c, 9D2c Sensor conductor portions 9Ad, 9Cd, 9Dd Voltage connection terminal contact portions 10, 10A, 10B, 10C, 10D, 10E Blocks 10a, 10Aa, 10Ca, 10Da Base mounting portions 10b, 10Ab, 10Cb, 10Db Cover attachment portions 10c, 10Ac, 10Cc, 10Dc Wire through holes 10Ad, 10Cd, 10Dd Block cover attachment protrusions 10Ae, 10Ce, 10De1, 10De2 Magnetic fixing portion recesses 10Cf Short-circuit movable portion end storage portion 11 Cover 12 Cover Mounting screw 13 Lower case 13a Weighing device connection portion 13b Weighing device mounting portion 14 Upper case 15 Electric wire 16 Electric meter mounting plate 101 Magnetic body for movable case 102 Magnetic body for base 103, 403 Voltage connection terminal 104 Switching section connection terminal 105 , 405, 505 Movable case 105a, 405a, 505a Lifting parts 105b, 405b, 505b Hook parts 105c, 405c, 505c Hook upper surfaces 105d, 405d, 505d Hook lower surfaces 105e, 405e, 505e Sliding parts 105f, 405f For movable case Magnetic body fixing parts 106, 206, 306, 406 Block covers 106a, 306a, 406a1, 406a2 Magnetic body insertion recesses 106b, 306b, 406b Voltage terminal abutting holes 106c, 406c Switching part terminal abutting holes 106d, 306d, 406d Block mounting hole 106e Magnetic material insertion hole 206c, 306c Movable part through hole 308, 408 Short-circuit movable part 308a Contact side end 308b Sliding end 505g Movable case transition part 505h Sealing part through hole 509 Sealing part 510 Sealing cap

Claims (5)

A metering device having a case and a base for measuring electric energy, a communication device attached to the metering device and transmitting the electric energy measured by the metering device to the outside, and a communication device attached to the metering device and connected to an electric wire. a terminal block and a cover covering the weighing device, the communication device and the terminal block;
The terminal block has a block cover having a magnetic body insertion hole, a voltage terminal contact hole, and an opening/closing portion terminal contact hole, and an opening/closing portion having opening/closing portion terminals for shorting and opening conductors. has
The weighing device includes a voltage connection terminal, a switch section connection terminal, a sensor body, a movable case magnetic body, a base magnetic body, a movable case magnetic body fixing section for fixing the movable case magnetic body, and a hook. a base magnetic body fixing part for fixing the base magnetic body, a movable case sliding mounting part for mounting and sliding the movable case, and a snap-fit structure having the movable case in an open state or a A movable case fixing portion fixed to the closed position, a sensor main body fixing portion, a voltage connection terminal hole, a switching portion connection terminal hole, and a base provided with a rib for inserting a terminal block,
When the weighing device is attached to the terminal block, the weighing device is inserted into the terminal block using the terminal block insertion rib as a guide, and the base magnetic body fixing portion is inserted into the magnetic body insertion hole. and the tip of the voltage connection terminal inserted into the voltage connection terminal hole abuts against the conductor through the voltage terminal abutment hole to operate by supplying power to the circuit portion, and the opening/closing portion. The tip of the opening/closing portion connection terminal inserted into the connection terminal hole abuts the opening/closing portion terminal through the opening/closing portion terminal abutment hole, and power is supplied from the circuit portion to operate the opening/closing portion. Then, the pressing portion for releasing fixation of the movable case fixing portion of the base is pushed to remove the upper surface of the projection of the movable case fixing portion from the lower surface of the hooking portion of the hooking portion to release the open state of the movable case, and the movable case is released. The movable case is fixed in a closed state by sliding the case so that the lower surface of the protrusion of the movable case fixing portion is hooked on the upper surface of the hooking portion of the hooking portion, and the conductor is surrounded by the sensor main body and the base. A watt-hour meter characterized in that current measurement is performed by covering with a magnetic material for a movable case and the magnetic material for a movable case. 2. The electric power according to claim 1, wherein the opening/closing part is composed of a driving part and a movable part, the driving part is provided in the weighing device, and the movable part is provided in the terminal block. Weighing scale. The movable part is composed of a driving movable part movable in the driving part and a short-circuiting movable part having a short-circuiting part, the driving movable part is provided in the weighing device, and the short-circuiting movable part is attached to the terminal block. 3. The electricity meter of claim 2, further comprising: The terminal block has a block cover with a plurality of the voltage terminal abutment holes, and has an opening/closing portion with a plurality of the short-circuiting portions. The movable case includes the sensor main body, a plurality of the magnetic bodies for the movable case, a plurality of the magnetic bodies for the base, and a plurality of the magnetic body fixing parts for the movable case, and fixes the plurality of the magnetic bodies for the base. 4. The watt-hour meter according to claim 3, wherein the base includes a plurality of the magnetic fixing portions for the base and a plurality of the voltage connection terminal holes, and performs current measurement corresponding to a plurality of terminals. . The base is provided with a sealing part in which a sealing part is embedded, and the movable case is provided with a sealing part through-hole. 5. The watt-hour meter according to claim 1, wherein the sealing is performed by inserting the sealing part through the through hole and attaching a sealing cap to the tip portion of the sealing part.

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