Electric energy meter

Abstract

To provide a watt-hour meter for preventing short-circuiting between different polarity terminals of a terminal block when mounting assembly metering equipment as a watt-hour meter and a replacement watt-hour meter.SOLUTION: A watt-hour meter includes metering equipment having a base 4A, a communication device, a terminal block that is mounted to the metering equipment, is connected to an electric wire, and has a block mount screw 6 for mounting to the base, and a cover 11 that covers the metering equipment, the communication device, and the terminal block, and has a cover mount screw for mounting to the base 4A, and also has a block mount part capable of mounting the block mount screw of the terminal block to the base, a communication device supporting part for supporting the communication device, a hole part for blocks and a cutout part for blocks for operating screws of the terminal block by a driver, and a female screw part for mounting a base-side cover for mounting a cover mounting screw of the cover can be assembled as the watt-hour meter by mounting the metering equipment, the terminal block, the communication device, and the cover, and can also be assembled as a replacement watt-hour meter by mounting the metering equipment, the communication device, and the cover.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an energy meter. [Background technology]

[0002] Conventionally, an electricity meter has a metering device, a communication device attached to the metering device and transmitting the amount of electricity measured by the metering device to the outside, a terminal block, and a cover. Figures 7(a) to 7(d) are process diagrams showing the procedure for assembling the metering device, the terminal block, the communication device, and the cover in a conventional electricity meter.

[0003] Fig. 7(a) shows the direction in which the metering device is attached to the terminal block, Fig. 7(b) shows the state in which the terminal block is attached to the metering device, Fig. 7(c) shows the state in which the communication device is attached to the metering device, and Fig. 7(d) shows the completed watt-hour meter with a cover attached to the terminal block. Figs. 8(a) and (b) show exploded views of a conventional watt-hour meter. Fig. 9(a) shows the appearance of a conventional communication device for a watt-hour meter, and Fig. 9(b) shows the metering device attachment part 24a provided on the communication device.

[0004] As shown in Figures 8(a) and 8(b), the metering device is composed of a circuit section 1 having a display section 1a that displays the amount of electricity, a communication device connection section 1b, an open / close detection section 1c, a conductor connection section 1d, a sensor connection section 1e, and a base mounting section 1f, a sensor section 2 that has a sensor side circuit connection section 2a that connects to the sensor connection section 1e of the circuit section 1 and measures the current, a conductor 3 that has a conductor side circuit connection section 3a that connects to the conductor connection section 1d of the circuit section 1 to supply power and a conductor side terminal connection section 3b that connects to the terminal side conductor connection section 9b of the terminal 9 of the terminal block, a base 4 that has a communication device connection section through hole 4a, a communication device mounting section 4b, a block mounting section 4c, an open / close detection section through hole 4d, a case mounting section 4e, a conductor through hole 4f, and a circuit mounting section 4g, and a case 5 that houses the above and has a display window 5a, a case side base mounting section 5b, a case waterproof rib storage section 5c, a case waterproof rib 5d, and a case side fixing screw mounting section 5e.

[0005] The communication device has a metering device connection part 21a and a metering device mounting part 24a, as shown in Fig. 9(a) and Fig. 9(b). The terminal block is composed of a block mounting screw 6, a conductor connection screw 7, an electric wire mounting screw 8, a terminal 9 having an electric wire storage part 9a and a terminal side conductor connection part 9b, a block 10 having a block side base mounting part 10a, a cover mounting female screw part 10b, an electric wire through hole 10c, a terminal mounting part 10d, a block side fixing screw mounting part 10e, and a block waterproof rib storage part 10f, as shown in Fig. 8(a) and Fig. 8(b). The cover is composed of a cover 11 having a detection convex part 11a and a cover waterproof rib 11b, and a cover mounting screw 12.

[0006] The procedure for assembling the metering device, communication device, terminal block, and cover thus configured to the watt-hour meter is as follows: First, as shown in Fig. 7(a), the metering device is placed above the terminal block and moved downward, and then, as shown in Fig. 7(b), the metering device is mated with the terminal block, and the conductor side terminal connection part 3b of the metering device is fixed to the terminal side conductor connection part 9b of the terminal 9 with the conductor connection screw 7 of the terminal block, and the block mounting part 4c of the metering device is fixed to the block side base mounting part 10a of the terminal block with the block mounting screw 6, thereby mounting the metering device to the terminal block.

[0007] At this time, the case waterproof rib 5d of the case 5 is stored in the block waterproof rib storage portion 10f of the block 10. Thereafter, as shown in Fig. 7(c), the weighing device mounting portion 24a of the communication device is fitted into the communication device mounting portion 4b of the weighing device base 4, and the weighing device connection portion 21a of the communication device is connected to the communication device connection portion 1b of the circuit unit 1 through the communication device connection portion through hole 4a of the weighing device base 4, thereby mounting the communication device to the weighing device.

[0008] 7(d), the cover waterproof rib of the cover 11 is inserted into the case waterproof rib storage section of the case 5, and the cover mounting screw 12 provided on the cover 11 is attached to the cover mounting female thread section 10b of the block 10, thereby assembling the watt-hour meter. When replacing the metering device by reusing the installed terminal block, it is necessary to prepare the metering device, communication device, and cover separately.

[0009] As an example of reference, there is an electricity meter that does not require disconnecting the power supply side power supply conductors and the load side power supply conductors that are connected to the terminal block, and allows the power supply control device to be attached and detached easily and safely. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Patent No. 4991340 Summary of the Invention [Problem to be solved by the invention]

[0011] It is inconvenient to carry the metering device, the communication device, and the cover separately, and at the same time, when transporting a large number of electricity meters, the metering device, the communication device, and the cover may become separated. The metering device and the communication device are combined one-to-one, and if the metering device and the communication device become separated, they need to be found.

[0012] In addition, when each item is carried by hand, there is a risk of it being dropped and damaged. When attaching the weighing device to the terminal block, the terminal connection of the weighing device may short-circuit the opposite pole terminals of the terminal block. Although the communication device is held in place by a cover, it is loose and may be damaged by vibrations during transportation.

[0013] To provide a watthour meter which can be assembled as a watthour meter having a metering device, a terminal block, a communication device, and a cover, and which can be assembled as a replacement watthour meter having a metering device, a communication device, and a cover without increasing the number of parts, thereby reducing costs, which prevents short-circuiting between opposite pole terminals of the terminal block when the metering device is installed, and which does not damage the communication device during transportation. [Means for solving the problem]

[0014] In order to solve the above problem, claim 1 of the present invention is characterized in that it comprises a metering device having a base, a communication device that is attached to the metering device and transmits the amount of electricity metered by the metering device to the outside, a terminal block that is attached to the metering device and connects to an electric wire and has a block mounting screw for mounting it to the base, and a cover that covers the metering device, the communication device and the terminal block and has a cover mounting screw for mounting it to the base, wherein the base is provided with a block mounting portion to which the block mounting screw of the terminal block can be attached, a communication device support portion that supports the communication device, a block hole portion and a block notch portion for operating the screws of the terminal block with a screwdriver, and a base side cover mounting female screw portion for mounting the cover mounting screw of the cover, and the metering device, the terminal block, the communication device and the cover can be attached to assemble it as an electricity meter, and the metering device, the communication device and the cover can also be attached to assemble it as a replacement electricity meter.

[0015] The invention of claim 2 comprises a metering device having a base, a communication device attached to the metering device and transmitting the amount of electricity metered by the metering device to the outside, a terminal block attached to the metering device and connected to an electric wire and having a block mounting screw for mounting it to the base, and a cover covering the metering device, the communication device and the terminal block and having a cover mounting screw for mounting it to the base, wherein the base is provided with a block mounting portion for mounting the block mounting screw of the terminal block, a communication device support portion for supporting the communication device, a block hole portion for operating the screws of the terminal block with a screwdriver, a base side cover mounting female thread portion for mounting the cover mounting screw of the cover, and guide portions on both left and right side surfaces, and when the metering device, the terminal block, the communication device and the cover are attached to assemble as an electricity meter, the metering device can be attached to the terminal block by sliding the inside of the guide portions on both left and right side surfaces along the left and right side surfaces of the terminal block, and the metering device, the communication device and the cover can be attached to assemble as a replacement electricity meter.

[0016] The invention of claim 3 is characterized in that a fixing portion having a snap-fit ​​structure with a claw portion is provided on the base, and when the communication device is attached to the base, the claw portion of the fixing portion of the base abuts against the surface of the communication device, thereby fixing the communication device. Effect of the Invention

[0017] According to the invention of claim 1, compared to using a terminal block as a replacement watt-hour meter, terminals and screws are not required, which reduces costs. In addition, since the current terminal block can be attached, it can also be used as a normal watt-hour meter.

[0018] According to the invention of claim 2, the weighing device can be attached to the terminal block by sliding vertically downward by aligning the inner surfaces of the guide portions on both the left and right sides of the base with the left and right sides of the terminal block, thereby preventing a short circuit between different pole terminals of the terminal block due to the conductor side terminal connection portion of the weighing device.

[0019] According to the invention of claim 3, it is possible to prevent the communication device from being damaged during transportation. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is an assembled perspective view of a watt-hour meter according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is an assembly perspective view of a watt-hour meter according to a first embodiment of the present invention and a perspective view of a base. [Diagram 3] FIG. 11 is an assembled perspective view of a watt-hour meter according to a second embodiment of the present invention. [Figure 4] FIG. 11 is an assembly perspective view of a watt-hour meter according to a second embodiment of the present invention and a perspective view of a base. [Diagram 5] FIG. 11 is an assembly perspective view of a watt-hour meter according to a third embodiment of the present invention and a perspective view of a base. [Figure 6] FIG. 13 is an assembly perspective view of a watt-hour meter according to a fourth embodiment of the present invention and a perspective view of a base. [Figure 7] FIG. 1 is a perspective view of a conventional watt-hour meter. [Figure 8] FIG. 1 is an exploded view of a conventional watt-hour meter. [Figure 9] FIG. 1 is a perspective view of a conventional communication device for an electricity meter. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a watt-hour meter according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0022] (First embodiment) Fig. 1 is an assembled perspective view of an electricity meter according to a first embodiment of the present invention. Fig. 1(a) shows the direction in which the metering device is attached from the front to the attached terminal block, Fig. 1(b) shows the state in which the back surface of the communication device support part of the metering device base is abutted against the front surface of the terminal block and the block attachment screw is passed through the block notch, Fig. 1(c) shows the state in which the metering device is slid downward and the block attachment part of the base is attached to the block attachment screw, and Fig. 1(d) shows the state in which the communication device is placed on the communication device support part of the metering device base.

[0023] Fig. 2 is an assembly perspective view of the watt-hour meter according to the first embodiment of the present invention and a perspective view of the base. Fig. 2(a) shows the watt-hour meter with the metering device, terminal block, communication device, and cover attached, seen from the back, Fig. 2(b) shows the replacement watt-hour meter with the metering device, communication device, and cover attached, seen from the back, and Fig. 2(c) is a diagram showing the details of the base.

[0024] As shown in Figures 1 and 2, the electricity meter has a metering device with a base 4A, communication devices 23, 24 that are attached to the metering device and transmit the amount of electricity measured by the metering device to the outside, a terminal block that is attached to the metering device and has a block mounting screw 6 for connecting to an electric wire and attaching it to the base 4A, and a cover 11 that covers the metering device, communication device and terminal block and has a cover mounting screw 12 for attaching it to the base 4A.

[0025] As shown in FIG. 2(c), the base 4A is provided with a block mounting portion 4Ac for mounting the block mounting screws 6 of the terminal block, a communication device support portion 4A1 for supporting the communication device, a block hole portion 4A2 and a block cutout portion 4A3 for operating the screws of the terminal block with a screwdriver, and a base-side cover mounting female thread portion 4A4 for mounting the cover mounting screws 12 of the cover 11.

[0026] Next, the operation of the watt-hour meter of the first embodiment thus configured will be described. First, the mounting screws 6 and the conductor connection screws 7 are loosened with a screwdriver so that there is a gap between the heads of the mounting screws 6 and the block-side base mounting parts 10a of the block 10, and there is a gap between the heads of the conductor connection screws 7 and the terminal-side conductor connection parts 9b.

[0027] Next, as shown in Figure 1(a), the metering device is attached from the front to the terminal block attached to the wall.

[0028] Next, as shown in Fig. 1(b), the back surface of the communication device support portion 4A1 of the weighing device base 4A is abutted against the front surface of the terminal block, and the block mounting screw 6 is passed through the block notch 4A3. Next, as shown in Fig. 1(c), the weighing device is slid downward, and the block mounting portion 4Ac of the base 4A is inserted between the screw head of the block mounting screw 6 of the terminal block and the block-side base mounting portion 10a of the block 10.

[0029] At the same time, the conductor-side terminal connecting portion 3b of the conductor 3 is inserted between the screw head of the conductor connecting screw 7 and the terminal-side conductor connecting portion 9b.

[0030] Then, the weighing device can be attached to the terminal block by tightening the block mounting screw 6 with a screwdriver to fix the block mounting portion 4Ac to the block side base mounting portion 10a, and tightening the conductor connection screw 7 with a screwdriver to connect the conductor side terminal connection portion 3b to the terminal side conductor connection portion 9b.

[0031] The block hole 4A2 is positioned opposite the conductor connection screw 7 and wire mounting screw 8 of the terminal block, and the block cutout 4A3 is positioned opposite the block mounting screw 6 and the screw attached to the block side fixing screw mounting portion, so that the screws of the terminal block can be operated with a screwdriver through the block hole 4A2 and the block cutout 4A3.

[0032] Next, as shown in Fig. 1(d), the communication device is placed on the communication device support portion 4A1 of the base 4A. Furthermore, the cover is fitted to the case, and the cover mounting screw 12 of the cover 11 is attached to the base-side cover mounting female thread portion 4A4 of the base 4A. That is, as shown in Fig. 2(a), the meter, terminal block, communication device, and cover 11 are attached to assemble the watt-hour meter.

[0033] Also, as shown in FIG. 2(b), it is possible to assemble it as a replacement electricity meter by removing the terminal block and attaching the metering device, communication device, and cover.

[0034] In this way, the watt-hour meter according to the first embodiment does not require terminals and screws, and costs can be reduced compared to when a terminal block is used as a replacement watt-hour meter. In addition, since the current terminal block can be attached, the watt-hour meter can also be used as a normal watt-hour meter.

[0035] Second Embodiment Fig. 3 is an assembled perspective view of an electricity meter according to a second embodiment of the present invention. Fig. 3(a) shows the direction in which the metering device is attached from the front to the attached terminal block, Fig. 3(b) shows the state in which the back surface of the communication device support part of the metering device base is abutted against the front surface of the terminal block and the block attachment screw is passed through the block hole, Fig. 3(c) shows the state in which the metering device is slid downward and the block attachment part of the base is attached to the block attachment screw, and Fig. 3(d) shows the state in which the communication device is placed on the communication device support part of the metering device base.

[0036] Fig. 4 is an assembly perspective view of an electricity meter according to a second embodiment of the present invention and a perspective view of a base. Fig. 4(a) shows the electricity meter with the metering device, terminal block, communication device, and cover attached as seen from the back, Fig. 4(b) shows a replacement electricity meter with the metering device, communication device, and cover attached as seen from the back, and Fig. 4(c) is a diagram showing the details of the base.

[0037] As shown in Figures 3 and 4, the electricity meter has a metering device with a base 4B, communication devices 23, 24 that are attached to the metering device and transmit the amount of electricity measured by the metering device to the outside, a terminal block that is attached to the metering device and has a block mounting screw 6 for connecting to an electric wire and attaching it to the base 4B, and a cover 11 that covers the metering device, communication device and terminal block and has a cover mounting screw 12 for attaching it to the base 4B.

[0038] As shown in FIG. 4(c), the base 4B is provided with a block mounting portion 4Bc for mounting the block mounting screws 6 of the terminal block, a communication device support portion 4B1 for supporting the communication device, a block hole portion 4B2 through which the screws of the terminal block can be operated with a screwdriver, a base-side cover mounting female thread portion 4B4 for mounting the cover mounting screws 12 of the cover 11, and guide portions 4B5 on both the left and right side surfaces of the base 4B.

[0039] Next, the operation of the watt-hour meter of the second embodiment configured as above will be described. First, the mounting screw 6 and the conductor connection screw 7 are loosened with a screwdriver so that there is a gap between the head of the mounting screw 6 and the block-side base mounting portion 10a of the block 10, and there is a gap between the head of the conductor connection screw 7 and the terminal-side conductor connection portion 9b.

[0040] Next, as shown in FIG. 3(a), the metering device is attached from the front to the terminal block attached to the wall.

[0041] Next, as shown in Fig. 3(b), the back surface of the communication device support portion 4B1 of the weighing device base 4B is abutted against the front surface of the terminal block, and the block mounting screw 6 is passed through the block hole portion 4B2. At the same time, the inner surfaces of the guide portions 4B5 on both the left and right sides of the base 4B face both the left and right sides of the terminal block.

[0042] 3(c), the weighing device is slid downward and the block mounting portion 4Bc of the base 4B is inserted between the screw head of the block mounting screw 6 of the terminal block and the block-side base mounting portion 10a of the block 10. At this time, the inner faces of the guide portions 4B5 on both the left and right sides of the base 4B fit along the left and right side faces of the terminal block, allowing the weighing device to slide vertically downward.

[0043] At the same time, the conductor-side terminal connecting portion 3b of the conductor 3 is inserted between the screw head of the conductor connecting screw 7 and the terminal-side conductor connecting portion 9b.

[0044] Then, the weighing device can be attached to the terminal block by tightening the block mounting screw 6 with a screwdriver to fix the block mounting portion 4Bc to the block side base mounting portion 10a, and tightening the conductor connection screw 7 with a screwdriver to connect the conductor side terminal connection portion 3b to the terminal side conductor connection portion 9b.

[0045] The block hole portion 4B2 is positioned opposite the terminal block's conductor connection screw 7, wire mounting screw 8, block mounting screw 6, and screws attached to the block side fixing screw mounting portion, and the screws of the terminal block can be operated with a screwdriver through the block hole portion 4B2.

[0046] Next, as shown in Fig. 3(d), the communication device is placed on the communication device support portion 4B1 of the base 4B. Furthermore, the cover is fitted to the case, and the cover mounting screw 12 of the cover 11 is attached to the base side cover mounting female screw portion 4B4 of the base 4B. That is, as shown in Fig. 4(a), the meter, terminal block, communication device, and cover 11 are attached to assemble the watt-hour meter.

[0047] Also, as shown in FIG. 4(b), it is possible to assemble it as a replacement electricity meter by removing the terminal block and attaching the metering device, communication device, and cover.

[0048] Thus, according to the electricity meter of the second embodiment, the inner surfaces of the guide portions 4B5 on both the left and right sides of the base 4B are aligned with the left and right side surfaces of the terminal block, so that the metering device can be attached to the terminal block by sliding vertically downward, thereby preventing a short circuit between different pole terminals of the terminal block due to the conductor side terminal connection portion 3b of the metering device.

[0049] (Third embodiment) Fig. 5 is an assembly perspective view of an energy meter according to a third embodiment of the present invention and a perspective view of a base. Fig. 5(a) shows a perspective view of the metering device base attached to a terminal block, Fig. 5(b) shows a perspective view of the communication device disposed on the communication device support part of the metering device base, and Fig. 5(c) is a perspective view of the base.

[0050] As shown in FIG. 5, the watt-hour meter further includes a fixing portion 4C7 having a snap-fit ​​structure and claw portions 4C6 on a base 4C in addition to the components of the watt-hour meter shown in FIG.

[0051] According to the watt-hour meter of the third embodiment configured as above, as shown in Fig. 5(b), when the metering device mounting portion 24a of the communication device is fitted into the communication device mounting portion 4Cb of the base 4C of the metering device and the communication device is mounted on the base 4C, the claw portion 4C6 of the fixing portion 4C7 of the base 4C abuts against the surface of the communication device, thereby fixing the communication device to the base 4C. Therefore, it is possible to prevent the communication device from being damaged during transportation.

[0052] Incidentally, a plurality of fixing portions 4C7 having a snap-fit ​​structure and claw portions 4C6 may be provided on the base 4C.

[0053] (Fourth embodiment) Fig. 6 is an assembly perspective view of an electricity meter according to a fourth embodiment of the present invention and a perspective view of a base. Fig. 6(a) shows a perspective view of the base attached to a terminal block, Fig. 6(b) shows a perspective view of the communication device disposed on the communication device support part of the meter base, and Fig. 6(c) is a perspective view of the base.

[0054] As shown in FIG. 6, the watt-hour meter further includes a fixing portion 4D7 having a snap-fit ​​structure and claw portions 4D6 on a base 4D in addition to the components of the watt-hour meter shown in FIG.

[0055] According to the watt-hour meter of the fourth embodiment configured as above, as shown in Fig. 6(b), when the metering device mounting portion 24a of the communication device is fitted into the communication device mounting portion 4Db of the base 4D of the metering device and the communication device is mounted on the base 4D, the claw portion 4D6 of the fixing portion 4D7 of the base 4D abuts against the surface of the communication device, thereby fixing the communication device to the base 4D. Therefore, it is possible to prevent the communication device from being damaged during transportation.

[0056] Incidentally, a plurality of fixing portions 4D7 having a snap-fit ​​structure and claw portions 4D6 may be provided on the base 4D. [Explanation of symbols]

[0057] 1 Circuit section 1a Display section 1b Communication device connection section 1c Open / close detector 1d Conductor connection 1e Sensor connection 1f Base mounting part 2 Sensor section 2a Sensor side circuit connection 3 Conductors 3a Conductor side circuit connection part 3b Conductor side terminal connection part 4,4A,4B,4C,4D Base 4a, 4Aa, 4Ba, 4Ca, 4Da Communication device connection through hole 4b, 4Ab, 4Bb, 4Cb, 4Db Communication device mounting section 4c, 4Ac, 4Bc, 4Cc, 4Dc Block mounting part 4d, 4Ad, 4Bd, 4Cd, 4Dd Open / close detection hole 4e, 4Ae, 4Be, 4Ce, 4De case mounting part 4f, 4Af, 4Bf, 4Cf, 4Df Conductor through holes 4g, 4Ag, 4Bg, 4Cg, 4Dg Circuit mounting part 4A1, 4B1, 4C1, 4D1 Communication device support section 4A2, 4B2, 4C2, 4D2 Block holes 4A3,4C3 Block cutout 4A4, 4B4, 4C4, 4D4 Female thread for mounting base cover 4B5,4D5 Guide part 4C6,4D6 Claw part 4C7,4D7 Fixed part 5 Cases 5a Display window 5b Case side base mounting part 5c Case waterproof rib storage area 5d Case waterproof rib 5e Case side fixing screw attachment part 6 Block mounting screws 7 Conductor Connection Screw 8 Wire mounting screw 9 Terminals 9a Wire storage section 9b Terminal side conductor connection part 10 Blocks 10a Block side base mounting part 10b Female thread for mounting cover 10c Wire hole 10d Terminal mounting part 10e Block side fixing screw mounting part 10f Block waterproof rib storage section 11 Cover 11a Detection protrusion 11b Cover waterproof rib 12 Cover mounting screw 21 Cable 21a Metering device connection 22 LED light guide 23 Upper case 24 Lower case 24a Metering device mounting part

Claims

1. a communication device attached to the metering device and configured to transmit an amount of electric power metered by the metering device to an outside; a terminal block attached to the metering device and configured to connect to an electric wire and configured to have a block mounting screw for mounting the terminal block to the base; and a cover covering the metering device, the communication device and the terminal block and configured to have a cover mounting screw for mounting the terminal block to the base, the base is provided with a block mounting portion capable of mounting the block mounting screws of the terminal block, a communication device support portion for supporting the communication device, a block hole portion and a block notch portion for operating the screws of the terminal block with a screwdriver, and a base side cover mounting female screw portion for mounting the cover mounting screws of the cover, An electricity meter characterized in that it can be assembled as an electricity meter by attaching the metering device, the terminal block, the communication device and the cover, and that it can also be assembled as a replacement electricity meter by attaching the metering device, the communication device and the cover.

2. a communication device attached to the metering device and configured to transmit an amount of electric power metered by the metering device to an outside; a terminal block attached to the metering device and configured to connect to an electric wire and configured to have a block mounting screw for mounting the terminal block to the base; and a cover covering the metering device, the communication device and the terminal block and configured to have a cover mounting screw for mounting the terminal block to the base, the base is provided with a block mounting portion for mounting the block mounting screws of the terminal block, a communication device support portion for supporting the communication device, a block hole portion for operating the screws of the terminal block with a screwdriver, a base side cover mounting female thread portion for mounting the cover mounting screws of the cover, and guide portions on both the left and right side surfaces; When the metering device, the terminal block, the communication device and the cover are attached to assemble as an electricity meter, the metering device can be slid vertically to be attached to the terminal block by aligning the inside of the guide portions on both left and right sides with the left and right side sides of the terminal block, and the metering device, the communication device and the cover can be attached to assemble as a replacement electricity meter.

3. a fixing portion having a snap-fit ​​structure and a claw portion is provided on the base; 3. The electricity meter according to claim 1, wherein when the communication device is attached to the base, the claw portion of the fixing portion of the base abuts against a surface of the communication device, thereby fixing the communication device.

Images