JP2022179947A - Watt-hour meter - Google Patents

Abstract

To provide a watt-hour meter that prevents shorting between different polarity terminals of a terminal block when attached to a metering device.SOLUTION: A watt-hour meter has: a terminal block having a conductor connecting screw 7 for attaching a conductor-side terminal connection part 3b to a terminal-side conductor connection part 9b; and a cover, and includes: a terminal tip protection part 101 having a conductor insertion part 101c, a tip part 101a that covers the conductor-side terminal connection part, a recess 101b for the conductor connecting screw to avoid the screw head of the conductor connecting screw, and a fixing part 101e having a pawl part 101d; and a conductor-side hole 3A1 that fits to the pawl part of the fixing part. The conductor-side terminal connection part is inserted into the conductor insertion part and fixed by the pawl part being fitted into the conductor hole. When a metering device is attached to the terminal block in a state where a communication device is removed from the metering device, the screw head of the conductor connecting screw is inserted into the recess for the conductor connecting screw, and the conductor connecting screw is tightened up to connect the conductor-side terminal connection part to the terminal-side conductor connection part, thereby attaching the metering device to the terminal block.SELECTED DRAWING: Figure 1

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. 7(a) to 7(d) are process diagrams showing procedures for assembling a metering device, a terminal block, a communication device, and a cover in a conventional watt-hour meter. 7(a) shows the direction of attaching the weighing device to the terminal block, FIG. 7(b) shows the state of attaching the terminal block to the weighing device, and FIG. 7(c) shows the communication device attached to the weighing device. Fig. 7(d) shows the completed watt-hour meter with the cover attached to the terminal block.

8(a) and 8(b) show an exploded view of a conventional watt-hour meter. FIG. 9(a) shows the appearance of a conventional watt-hour meter communication device, and FIG. 9(b) shows a metering device mounting portion 24a provided in the communication device. As shown in FIGS. 8(a) and 8(b), the metering device includes a display portion 1a for displaying electric energy, a communication device connection portion 1b, an open/close detection portion 1c, a conductor connection portion 1d, and a sensor connection portion 1e. A circuit portion 1 having a base attachment portion 1f, a sensor portion 2 having a sensor-side circuit connection portion 2a connected to a sensor connection portion 1e of the circuit portion 1 and measuring current, and connected to a conductor connection portion 1d of the circuit portion 1. A conductor 3 having a conductor-side circuit connection portion 3a for supplying power and a conductor-side terminal connection portion 3b connected to a terminal-side conductor connection portion 9b of a terminal block terminal 9, a communication device connection portion through hole 4a, and a communication device mounting portion. 4b, a block mounting portion 4c, an opening/closing detection portion through hole 4d, a case mounting portion 4e, a conductor through hole 4f, and a circuit mounting portion 4g. It is composed of a case 5 having a waterproof rib accommodating portion 5c, a case waterproof rib 5d, and a case-side fixing screw mounting portion 5e.

As shown in FIGS. 9(a) and 9(b), the communication device has a weighing device connecting portion 21a and a weighing device mounting portion 24a.

As shown in FIGS. 8(a) and 8(b), the terminal block includes a block mounting screw 6, a conductor connecting screw 7, a wire mounting screw 8, a terminal 9 having a wire housing portion 9a and a terminal side conductor connecting portion 9b. , block side base mounting portion 10a, cover mounting female screw portion 10b, wire through hole 10c, terminal mounting portion 10d, block side fixing screw mounting portion 10e, and block waterproofing rib housing portion 10f.

As shown in FIGS. 8(a) and 8(b), the cover is composed of a cover 11 having a detection projection 11a and a cover waterproofing rib 11b, and a cover mounting screw 12. As shown in FIG.

The procedure for assembling the metering device, communication device, terminal block, and cover configured in this manner to the electricity meter will be described below. First, as shown in FIG. 7(a), when the weighing device is placed above the terminal block and moved downward, the weighing device is fitted to the terminal block as shown in FIG. 7(b).

After that, the conductor-side terminal connection portion 3b of the weighing device is fixed to the terminal-side conductor connection portion 9b of the terminal 9 with the conductor connection screw 7 of the terminal block, and the block mounting portion 4c of the weighing device is fixed with the block mounting screw 6 to the terminal block. The weighing device can be attached to the terminal block by fixing it to the block-side base attachment portion 10a.

At this time, the case waterproof rib 5 d of the case 5 is accommodated in the block waterproof rib accommodating portion 10 f of the block 10 . After that, as shown in FIG. 7(c), the weighing device attachment portion 24a of the communication device is fitted to the communication device attachment portion 4b of the base 4 of the weighing device, and the weighing device connection portion 21a of the communication device is connected to the weighing device. The communication device is attached to the weighing device by connecting to the communication device connection portion 1b of the circuit portion 1 through the communication device connection portion through hole 4a of the base 4 of the .

After that, as shown in FIG. 7(d), the cover waterproof ribs of the cover 11 are inserted into the case waterproof rib housing portions of the case 5, and the cover mounting screws 12 provided on the cover 11 are screwed into the block 10 for cover mounting. By attaching it to the internal threaded portion 10b, the watt-hour meter is assembled.

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

As a reference, there is a watt-hour meter that can easily and safely attach and detach the 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.

Japanese Patent No. 4991340

When replacing the electricity meter, remove the old metering device attached by loosening the terminal block mounting screw and the conductor connection screw, and attach the new metering device to the terminal block. may short-circuit.

The present invention provides a watt-hour meter capable of preventing a short circuit between terminals of different polarities of a terminal block when a metering device is attached.

In order to solve the above-mentioned problems, claim 1 of the present invention provides a metering device comprising a conductor having a conductor-side terminal connection portion, and a metering device attached to the metering device for transmitting the amount of electric power metered by the metering device to the outside. a terminal having a terminal-side conductor connection portion for connecting an electric wire and connecting to the conductor; a terminal block having a conductor connection screw for attaching the conductor-side terminal connection portion to the terminal-side conductor connection portion; A conductor connection screw for avoiding the screw head of the conductor connection screw, comprising: a device, the communication device, and a cover that covers the terminal block; a conductor insertion portion for inserting the conductor; A terminal tip protection portion having a fixing portion with a snap-fit structure having a concave portion and a claw portion is provided, the conductor is provided with a conductor-side hole portion that fits into the claw portion of the fixing portion, and the conductor-side terminal connecting portion is connected to the The conductor is inserted into the conductor insertion portion and fixed by fitting the claw portion into the conductor-side hole, and when the measuring device is attached to the terminal block in a state in which the communication device is removed from the measuring device, the conductor The screw head of the connection screw is inserted into the recess for the conductor connection screw, and the weighing device is attached to the terminal block by tightening the conductor connection screw to connect the conductor-side terminal connection portion to the terminal-side conductor connection portion. It is characterized by

The invention of claim 2 comprises: a metering device comprising a base having a conductor through-hole and a conductor having a conductor-side terminal connecting portion; a device, a terminal provided with a terminal-side conductor connection portion for connecting an electric wire and the conductor, a terminal block provided with a conductor connection screw for attaching the conductor-side terminal connection portion to the terminal-side conductor connection portion, and the weighing device; A conductor insertion portion for inserting the conductor, a tip portion for covering the conductor-side terminal connection portion, and a conductor connection screw recess for avoiding the screw head of the conductor connection screw. A terminal tip protection part having a hook is provided, a recess on the base side is provided in the conductor through hole to fit the hook on the base side, the tip is inserted into the conductor through hole, and the hook is fitted into the recess on the base side. After the conductor-side terminal connection portion is inserted into the conductor insertion portion and fixed, and when the measuring device is attached to the terminal block with the communication device removed from the measuring device, the conductor connection screw is fixed. A screw head is inserted into the recess for a conductor connection screw, and the weighing device is attached to the terminal block by tightening the conductor connection screw to connect the conductor-side terminal connection portion to the terminal-side conductor connection portion. and

The invention of claim 3 comprises a metering device comprising a base having a conductor through-hole and a conductor having a conductor-side terminal connecting portion, and a communication device attached to the metering device and transmitting the amount of electric power metered by the metering device to the outside. a device, a terminal provided with a terminal-side conductor connection portion for connecting an electric wire and the conductor, a terminal block provided with a conductor connection screw for attaching the conductor-side terminal connection portion to the terminal-side conductor connection portion, and the weighing device; a conductor insertion portion for inserting the conductor into the base; a tip portion for covering the conductor-side terminal connection portion; and a conductor connection screw for avoiding the screw head of the conductor connection screw. a terminal tip protection portion having a recess for use is provided, the conductor-side terminal connecting portion is inserted into and fixed to the conductor through-hole and the conductor insertion portion, and the weighing device is mounted in a state in which the communication device is removed from the weighing device. When attached to the terminal block, the screw head of the conductor connection screw is inserted into the conductor connection screw recess, and the conductor connection screw is tightened to connect the conductor side terminal connection portion to the terminal side conductor connection portion. The metering device is attached to the terminal block.

According to the invention of claim 1, by covering the tip of the conductor-side terminal connection part with the insulating terminal tip protection part, when the weighing device is attached to the terminal block, the tip of the conductor-side terminal connection part is erroneously adjacent to the terminal block. When terminals of different polarities come into contact with each other, the terminal tip protection portion, which is an insulator, comes into contact with the conductor-side terminal connection portion first, so that a short circuit between the terminals of different polarities can be prevented.

According to the second aspect of the invention, unlike the first aspect, since the terminal tip protection portion is fixed to the base, it is possible to prevent the terminal tip protection portion from coming off.

According to the invention of claim 3, unlike claim 2, since the terminal tip protection portion is integrated with the base, the manufacturing cost can be reduced.

1A and 1B are a perspective view and a cross-sectional view of a power meter according to a first embodiment of the present invention; FIG. 1 is a perspective view of a metering device and a terminal tip protector of a watt-hour meter according to a first embodiment of the present invention; FIG. 2A and 2B are a perspective view and a cross-sectional view of a power meter according to a second embodiment of the present invention; FIG. FIG. 8 is an exploded view of a metering device of a power meter and a perspective view of a terminal tip protection portion according to a second embodiment of the present invention; 3A and 3B are a perspective view and a cross-sectional view of a power meter according to a third embodiment of the present invention; FIG. FIG. 11 is a perspective view of a base of a watt-hour meter according to a third embodiment of the present invention; 1 is a perspective view of a conventional watt-hour meter; FIG. 1 is an exploded view of a conventional electricity meter; FIG. 1 is a perspective view of a conventional watt-hour meter communication device; FIG.

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

(First embodiment)
1(a) to 1(d) are a perspective view and a cross-sectional view of a power meter according to a first embodiment of the present invention. FIG. 1(a) shows the direction in which the metering device is attached to the terminal block, and FIG. 1(b) shows the state in which the terminal block is attached to the metering device. FIG.1(c) shows sectional drawing of the watt-hour meter shown to Fig.1 (a). FIG.1(d) shows sectional drawing of the watt-hour meter shown in FIG.1(b).

2(a) to 2(c) are perspective views of the metering device and the terminal tip protector of the watt-hour meter. FIG. 2(a) shows a state in which the base is attached to the case, and FIGS. 2(b) and 2(c) show perspective views of the terminal tip protector.

The watt hour meter includes a metering device, a communication device (upper case 23 and lower case 24 shown in FIG. 9) 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. , and a terminal tip protection portion 101 .

The weighing device comprises a case 5, a base 4 housed in the case 5, and a conductor 3A attached to the base 4. The conductor 3A is provided with a conductor-side terminal connection portion 3Ab whose tip is connected to the terminal 9, and a conductor-side hole portion 3A1 that fits into the claw portion 101d of the fixing portion 101e of the terminal tip protection portion 101. there is

The terminal block includes terminals 9 having terminal-side conductor connection portions 9b for connecting electric wires and conductors 3A, and conductor connection screws 7 for attaching the conductor-side terminal connection portions 3Ab to the terminal-side conductor connection portions 9b. A cover covers the metering device, the communication device and the terminal block.

The terminal tip protection part 101 is made of an insulating material, and as shown in FIGS. It has a conductor connection screw recess 101b, a conductor insertion portion 101c into which the conductor 3A is inserted, and a fixing portion 101e having a snap-fit structure having claw portions 101d.

Next, the operation of the watt hour meter of the first embodiment configured in this manner will be described. First, when the conductor-side terminal connection portion 3Ab shown in FIG. 2A is inserted into the conductor insertion portion 101c of the terminal tip protection portion 101 shown in FIG. The terminal tip protection portion 101 is fixed by fitting the claw portion 101d of the protection portion 101 into the conductor side hole portion 3A1.

When the weighing device is attached to the terminal block with the communication device removed from the weighing device, there is a gap between the screw head of the conductor connection screw 7 and the terminal-side conductor connection portion 9b, as shown in FIG. 1(c). When the weighing device is lowered onto the terminal block from above, the threaded portion of the conductor connection screw 7 is inserted between the two hands of the conductor side terminal connection portion 3Ab, and at the same time, Figs. 1(b) and 1(d) 2, the conductor connection screw recess 101b of the terminal tip protection portion 101 avoids the screw head of the conductor connection screw 7. As shown in FIG.

Next, by tightening the conductor connection screw 7 and connecting the conductor-side terminal connection portion 3Ab to the terminal-side conductor connection portion 9b, the weighing device can be attached to the terminal block.

As described above, according to the watt-hour meter according to the first embodiment, by covering the tip of the conductor-side terminal connection portion 3Ab with the terminal tip protection portion 101 made of an insulating material, when the metering device is attached to the terminal block, an erroneous When the tip of the conductor-side terminal connection portion 3Ab comes into contact with adjacent terminals of different polarity, the terminal tip protection portion 101, which is an insulator, comes into contact with the conductor-side terminal connection portion 3Ab before the contact of the conductor-side terminal connection portion 3Ab. can be prevented.

In addition, in the terminal tip protection portion 101, instead of the fixing portion 101e having the snap-fit structure having the claw portion 101d, it is changed to have only the claw portion 101d (convex portion), and the conductor 3A does not have the conductor side hole portion 3A1. , a similar effect can be obtained by changing to a concave portion.

(Second embodiment)
3(a) to 3(d) are a perspective view and a cross-sectional view of a power meter according to a second embodiment of the present invention. FIG. 3(a) shows the direction in which the metering device is attached to the terminal block, and FIG. 3(b) shows the state in which the terminal block is attached to the metering device. FIG.3(c) shows sectional drawing of the watt-hour meter shown to Fig.3 (a). FIG.3(d) shows sectional drawing of the watt-hour meter shown in FIG.3(b).

4(a) to 4(c) are perspective views of the metering device and the terminal tip protector of the watt-hour meter. FIG. 4(a) shows an assembly drawing around the base, and FIGS. 4(b) and 4(c) show perspective views of terminal tip protection portions.

The watt-hour meter has 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.

The weighing device includes a case 5, a base 4B housed in the case 5, a terminal tip protector 201 attached to the base 4B, and a conductor 3 attached to the terminal tip protector 201. FIG. As shown in FIG. 4(a), the base 4B has a conductor through hole 4Bf and a base-side recess 4B1, and the conductor 3 has a conductor-side terminal connecting portion 3b.

The terminal tip protection part 201 is made of an insulating material, and as shown in FIGS. It has a conductor connection screw recess 201b, a conductor insertion portion 201c into which the conductor 3 is inserted, and a hook portion 201f that fits into the base side recess 4B1.

The terminal block includes a terminal 9 having a terminal-side conductor connection portion 9b for connecting an electric wire and a conductor 3, and a conductor connection screw 7 for attaching the conductor-side terminal connection portion 3b to the terminal-side conductor connection portion 9b. A cover covers the metering device, the communication device and the terminal block.

Next, the operation of the watt hour meter of the second embodiment configured in this manner will be described. First, as shown in FIG. 4A, the tip portion 201a of the terminal tip protection portion 201 is inserted into the conductor through-hole 4Bf of the base 4B, and the hook portion 201f of the terminal tip protection portion 201 engages with the base side concave portion 4B1 of the base 4B. , the conductor-side terminal connection portion 3b is inserted into the conductor insertion portion 201c of the terminal tip protection portion 201 and fixed, and the substrate 1 and the case 5 are attached to assemble the weighing device.

When the measuring device is attached to the terminal block with the communication device removed from the measuring device, as shown in FIG. When the weighing device is lowered onto the terminal block from above, the threaded portion of the conductor connection screw 7 is inserted between the two hands of the conductor side terminal connection portion 3b, and at the same time as shown in FIGS. 3(b) and 3(d). 2, the conductor connection screw recess 201b of the terminal tip protection portion 201 avoids the screw head of the conductor connection screw 7. As shown in FIG.

Next, the weighing device can be attached to the terminal block by tightening the conductor connection screw 7 to connect the conductor-side terminal connection portion 3b to the terminal-side conductor connection portion 9b.

As described above, according to the watt-hour meter of the second embodiment, unlike the watt-hour meter of the first embodiment, the hooking portion 201f of the terminal tip protection portion 201 is inserted into the base-side concave portion 4B1 of the base 4B. match. That is, since the terminal tip protection portion 201 is fixed to the base 4B, it is possible to prevent the terminal tip protection portion 201 from coming off.

(Third embodiment)
5(a) to 5(d) are a perspective view and a sectional view of a power meter according to a third embodiment of the present invention. FIG. 5(a) shows the direction in which the metering device is attached to the terminal block, and FIG. 5(b) shows the state in which the terminal block is attached to the metering device. FIG. 5(c) shows a cross-sectional view of the watt-hour meter shown in FIG. 5(a). FIG.5(d) shows sectional drawing of the watt-hour meter shown in FIG.5(b). FIG. 6 is a perspective view of the base of the electricity meter.

The watt-hour meter has 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.

The weighing device includes a case 5, a base 4C housed in the case 5, and a conductor 3 having a conductor-side terminal connection portion 3b.

As shown in FIG. 6, the base 4C includes a conductor through hole 4Cf, a tip portion 4C3 that covers the conductor side terminal connection portion 3b, a conductor connection screw recess 4C4 that avoids the screw head of the conductor connection screw 7, and a conductor 3 is inserted. A terminal tip protection portion 4C2 having a conductor insertion portion 4C5 is provided.

The terminal block includes a terminal 9 having a terminal-side conductor connection portion 9b for connecting an electric wire and a conductor 3, and a conductor connection screw 7 for attaching the conductor-side terminal connection portion 3b to the terminal-side conductor connection portion 9b. A cover covers the metering device, the communication device and the terminal block.

Next, the operation of the power meter of the third embodiment configured in this way will be described. First, as shown in FIG. 5(c), the conductor-side terminal connection portion 3b is inserted into the conductor through-hole 4Cf and the conductor insertion portion 4C5 of the base 4C and fixed, and the substrate 1 and the case 5 are attached to complete the weighing device. Assembled.

When the weighing device is attached to the terminal block with the communication device removed from the weighing device, there is a gap between the screw head of the conductor connection screw 7 and the terminal-side conductor connection portion 9b, as shown in FIG. 5(c). When the weighing device is lowered onto the terminal block from above, the threaded portion of the conductor connection screw 7 is inserted between the two hands of the conductor side terminal connection portion 3b, and at the same time, Figs. 5(b) and 5(d) 2, the conductor connection screw recess 4C4 of the terminal tip protection portion 4C2 avoids the screw head of the conductor connection screw 7. As shown in FIG.

Next, the weighing device can be attached to the terminal block by tightening the conductor connection screw 7 to connect the conductor-side terminal connection portion 3b to the terminal-side conductor connection portion 9b.

As described above, according to the watt-hour meter according to the third embodiment, since the terminal tip protection portion 4C2 is integrated with the base 4C, the manufacturing cost can be reduced compared to the second embodiment.

1 circuit portion 1a display portion 1b communication device connection portion 1c open/close detection portion 1d conductor connection portion 1e sensor connection portion 1f base mounting portion 2 sensor portion 2a sensor side circuit connection portions 3, 3A conductors 3a, 3Aa conductor side circuit connection portion 3b, 3Ab Conductor-side terminal connection portion 3A1 Conductor-side hole portions 4, 4B Bases 4a, 4Ba, 4Ca Communication device connection portion through holes 4b, 4Bb, 4Cb Communication device mounting portions 4c, 4Bc, 4Cc Block mounting portions 4d, 4Bd, 4Cd Open/close detection through-holes 4e, 4Be, 4Ce case mounting portions 4f, 4Bf, 4Cf conductor through-holes 4g, 4Bg, 4Cg circuit mounting portion 4B1 base-side concave portion 4C2 terminal tip protection portion
4C3 Tip portion 4C4 Conductor connection screw recess 4C5 Conductor insertion portion 5 Case 5a Display window 5b Case side base mounting portion 5c Case waterproofing rib storage portion 5d Case waterproofing rib 5e Case side fixing screw mounting portion 6 Block mounting screw 7 Conductor connection Screw 8 Wire mounting screw 9 Terminal 9a Wire housing portion 9b Terminal side conductor connecting portion 10 Block 10a Block side base mounting portion 10b Cover mounting female screw portion 10c Wire through hole 10d Terminal mounting portion 10e Block side fixing screw mounting portion 10f Block waterproofing Rib housing portion 11 Cover 11a Detection convex portion 11b Cover waterproof rib 12 Cover mounting screw 21 Cable 21a Weighing device connecting portion 22 LED light guiding portion 23 Upper case 24 Lower case 24a Weighing device mounting portions 101, 201 Terminal tip protection portion 101a , 201a Tip portions 101b, 201b Conductor connection screw recesses 101c, 201c Conductor insertion portion 101d Claw portion 101e Fixing portion 201f Hook portion

Claims (3)

A metering device comprising a conductor having a conductor-side terminal connection portion, a communication device attached to the metering device and transmitting the amount of electric power metered by the metering device to the outside, and a terminal for connecting an electric wire and the conductor. a terminal having a side conductor connection portion; a terminal block having a conductor connection screw for attaching the conductor side terminal connection portion to the terminal side conductor connection portion; and a cover covering the weighing device, the communication device and the terminal block. ,
a conductor inserting portion for inserting the conductor; a tip covering the conductor-side terminal connecting portion; a conductor connecting screw recess for avoiding the screw head of the conductor connecting screw; a portion is provided, and the conductor is provided with a conductor-side hole portion that fits into the claw portion of the fixing portion;
The conductor-side terminal connecting portion is inserted into the conductor-inserting portion, and the claw portion is fixed by fitting into the conductor-side hole portion. When attaching to the terminal block, the screw head of the conductor connection screw is inserted into the recess for the conductor connection screw, and the conductor connection screw is tightened to connect the conductor side terminal connection portion to the terminal side conductor connection portion. A power meter, characterized in that a metering device is attached to said terminal block. A metering device comprising a base having a conductor through-hole and a conductor having a conductor-side terminal connecting part, a communication device attached to the metering device and transmitting the amount of electric power measured by the metering device to the outside, and electric wires are connected. a terminal provided with a terminal-side conductor connection portion connected to the conductor, a terminal block provided with a conductor connection screw for attaching the conductor-side terminal connection portion to the terminal-side conductor connection portion, the weighing device, the communication device, and the terminal block and a cover covering the
a conductor insertion portion for inserting the conductor, a tip portion covering the conductor-side terminal connection portion, a conductor connection screw recess for avoiding the screw head of the conductor connection screw, and a terminal tip protection portion having a hook portion, wherein the conductor through hole is provided. provided with a base-side recess that fits into the hook,
After inserting the tip portion into the conductor through-hole and fitting the hooking portion into the base-side concave portion, the conductor-side terminal connection portion is inserted into the conductor insertion portion and fixed, thereby connecting the communication device to the weighing device. When the weighing device is attached to the terminal block after being removed from the terminal block, the screw head of the conductor connection screw is inserted into the conductor connection screw recess, and the conductor connection screw is tightened to connect the conductor side terminal connection portion to the terminal. An electricity meter, characterized in that said metering device is attached to said terminal block by connecting to a side conductor connection. A metering device comprising a base having a conductor through-hole and a conductor having a conductor-side terminal connecting part, a communication device attached to the metering device and transmitting the amount of electric power measured by the metering device to the outside, and electric wires are connected. a terminal provided with a terminal-side conductor connection portion connected to the conductor, a terminal block provided with a conductor connection screw for attaching the conductor-side terminal connection portion to the terminal-side conductor connection portion, the weighing device, the communication device, and the terminal block and a cover covering the
a terminal tip protection portion having a conductor insertion portion for inserting the conductor into the base, a tip portion covering the conductor side terminal connection portion, and a conductor connection screw recess for avoiding the screw head of the conductor connection screw;
The conductor-side terminal connecting portion is inserted into and fixed to the conductor through-hole and the conductor inserting portion, and when the measuring device is attached to the terminal block with the communication device removed from the measuring device, the conductor connection screw is inserted into the recess for the conductor connection screw, and by tightening the conductor connection screw to connect the conductor-side terminal connection portion to the terminal-side conductor connection portion, the weighing device is attached to the terminal block. An electricity meter characterized by:

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