JP7626675B2 - Power meter - Google Patents

Description

The present invention relates to a watt-hour meter.

Conventionally, a watt-hour meter has a metering device, a communication device that is attached to the metering device and transmits the amount of electricity measured by the metering device to the outside, a terminal block, and a cover. Figures 9(a) to 9(d) are process diagrams showing the procedure for assembling the metering device, terminal block, communication device, and cover in a conventional watt-hour meter. Figure 9(a) shows the direction in which the metering device is attached to the terminal block, Figure 9(b) shows the state in which the terminal block is attached to the metering device, Figure 9(c) shows the state in which the communication device is attached to the metering device, and Figure 9(d) shows the completed watt-hour meter with the cover attached to the terminal block. Figures 10(a) and (b) show exploded views of a conventional watt-hour meter. Figure 11(a) shows the appearance of a conventional communication device for a watt-hour meter, and Figure 11(b) shows the metering device attachment part 24a provided on the communication device.

As shown in Fig. 10(a) and Fig. 10(b), the measuring device is composed of a circuit section 1 having a display section 1a that displays the amount of power, 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 attachment 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 attachment section 4b, a block attachment section 4c, an open/close detection section through hole 4d, a case attachment section 4e, a conductor through hole 4f, and a circuit attachment section 4g, and a case 5 that houses them and has a display window 5a, a case side base attachment section 5b, a case waterproof rib storage section 5c, a case waterproof rib 5d, and a case side fixing screw attachment section 5e.

As shown in Fig. 11(a)-11(b), the communication device has a metering device connection part 21a and a metering device mounting part 24a. As shown in Fig. 10(a)-10(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, and 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. 10(a)-10(b), the cover is composed of a cover 11 having a detection protrusion 11a and a cover waterproof rib 11b, and a cover mounting screw 12.

The procedure for assembling the metering device, communication device, terminal block, and cover configured in this way to the electricity meter is as follows. First, as shown in FIG. 9(a), the metering device is placed above the terminal block and moved downward. Then, as shown in FIG. 9(b), the metering device is mated with the terminal block. Then, the conductor side terminal connection portion 3b of the metering 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 metering device is fixed to the block side base mounting portion 10a of the terminal block with the block mounting screw 6, thereby attaching the metering device to the terminal block.

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. Then, as shown in FIG. 10(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 portion 1 through the communication device connection portion through hole 4a of the weighing device base 4, thereby attaching the communication device to the weighing device.

Then, as shown in FIG. 10(d), insert the cover waterproof rib 11b of the cover 11 into the case waterproof rib storage portion 5c of the case 5, and attach the cover mounting screw 12 provided on the cover 11 to the cover mounting female thread portion 10b of the block 10, thereby assembling the watt-hour meter. When replacing the metering device by reusing the installed terminal block, perform the above watt-hour meter assembly procedure in reverse.

First, the cover mounting screws 12 of the old and new watthour meters are loosened to remove the cover 11, then transported to a nearby location for storage, the metering device mounting portion 24a is removed from the communication device connection portion 1b to remove the communication device, then transported to a nearby location for storage, and the block mounting screws 6 and conductor connection screws 7 of the terminal block are loosened to remove the metering device, then transported to a nearby location for storage. Next, the watthour meter replacement is completed by attaching the new watthour meter, new communication device, and new cover to the old terminal block.

Thus, when replacing a power meter, the work of loosening screws and transporting the cover when removing it occurs twice, and the work of transporting and tightening screws when installing the cover occurs once. In addition, the work of removing and transporting the communication device occurs twice, and the work of transporting and installing the communication device occurs once.

For reference, there is a power meter that does not require the removal of the power supply conductors and load supply conductors connected to the terminal block, and allows the power supply control device to be easily and safely attached and detached.

Patent No. 4991340

When replacing a watt-hour meter, the tasks of loosening the cover mounting screws, transporting and storing the cover, transporting it when installing the cover, and tightening the cover mounting screws were required, which lengthened the work time and increased the labor costs. In addition, the tasks of removing the communication device, transporting and storing the communication device, transporting it when installing the communication device, and installing the communication device were required, which lengthened the work time and increased the labor costs.

The present invention provides a watt-hour meter that can reduce the time required to remove and install the cover, and can reduce installation costs.

In order to solve the above problem, claim 1 of the present invention provides a measuring device having a case and a cover, a communication device attached to the measuring device and transmitting the amount of electricity measured by the measuring device to the outside, and a terminal block attached to the measuring device and connected to an electric wire, and a fixing part having a snap-fit structure having a cylindrical rotating shaft hole, a closing protrusion, an opening protrusion, and a release part for releasing the closed state and the open state of the cover are provided on both left and right sides of the case, a rotating shaft on the front side of the cover, cylindrical rotating shaft protrusions on the outside of both left and right sides of the rotating shaft, a fixing recess for engaging with the closing protrusion below the rotating shaft to hold the cover in the closed state, and a finger inserted between the release part and the cover when the cover is in the closed state. The release recess is a space provided for operating the release part, and a cover waterproof rib is provided above the rotating shaft, the rotating shaft protrusion of the cover fits into the rotating shaft hole of the case to make the cover rotatable, the upper surface of the cover waterproof rib abuts against the upper surface of the opening protrusion to hold the cover in the open state, the weighing device is attached to the terminal block, and after the communication device is attached, the release part is spread left and right to remove the upper surface of the cover waterproof rib from the upper surface of the opening protrusion, the cover is rotated downward around the rotating shaft protrusion as an axis and lowered, the closing protrusion fits into the fixing recess to hold the cover in the closed state, and the weighing device is attached to the terminal block.

The invention of claim 2 provides a cover side sliding part consisting of a recess, a closing recess, and an opening recess on the outer left and right sides of the cover, provides a fixed cover having a fixed cover side sliding part consisting of a protrusion and a fixed part having a snap-fit structure with a fixed protrusion, and the fixed cover side sliding part is engaged with the cover side sliding part to allow the fixed cover to slide up and down, and when the cover is in a closed state, the fixed cover is slid downward to engage the fixed protrusion with the opening recess, exposing the release recess and the release part, making the release part operable and opening the cover, and the fixed cover is slid upward to engage the fixed protrusion with the closing recess, covering the release recess and the release part with the fixed cover, making the release part inoperable and restricting the cover from being opened.

The invention of claim 3 is characterized in that the cover is provided with a communication device mounting portion for mounting the communication device, and a fixing portion having a snap-fit structure with a fixing protrusion, and the communication device is attached to the communication device mounting portion, and the communication device is fixed by the fixing protrusion of the cover.

According to the invention of claim 1, compared to the current product, the cover and case are integrated with a hinge structure, and the cover can be held in the open state by the opening convex part of the fixing part of the case, eliminating the need to transport and store the cover when it is removed, and the need to transport it when it is attached, thereby shortening the work time. In addition, the cover can be held in the closed state by the closing convex part of the fixing part of the case, eliminating the need to loosen and tighten the cover attachment screws, thereby shortening the work time.

According to the invention of claim 2, compared to claim 1, the release part of the fixed part of the case is covered with a fixed cover, so that the cover cannot be easily opened, and tampering can be prevented.

According to the invention of claim 3, compared to the current product, the communication device can be attached to the cover, eliminating the need to remove the communication device, transport and store it, transport it when installing it, and install it, thereby reducing work time. Also, compared to the current product, the weighing device, communication device, and cover can be assembled and carried around, so no extra parts are added when replacing the weighing device.

1 is an assembled perspective view of a watt-hour meter according to a first embodiment of the present invention; 1 is an assembly perspective view and a partial cross-sectional view of a watt-hour meter according to a first embodiment of the present invention; FIG. 2 is a perspective view of a case and a cover of the watt-hour meter according to the first embodiment of the present invention. FIG. 11 is an assembled perspective view of a watt-hour meter according to a second embodiment of the present invention. 5A and 5B are an assembly perspective view and a partial cross-sectional view of a watt-hour meter according to a second embodiment of the present invention. FIG. 11 is a perspective view of a case, a cover, and a fixed cover of a watt-hour meter according to a second embodiment of the present invention. FIG. 13 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 cover. 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 cover. FIG. 1 is a perspective view of a conventional watt-hour meter. FIG. 1 is an exploded view of a conventional watt-hour meter. FIG. 1 is a perspective view of a conventional communication device for an electricity meter.

The following describes in detail the electricity meter according to an embodiment of the present invention with reference to the drawings.

First Embodiment
1, 2 and 3 are a perspective view and a cross-sectional view of a watt-hour meter according to a first embodiment of the present invention.

Figures 1(a) to 1(d) and 2(a) to 2(b) are assembly perspective views showing the procedure for assembling the weighing device, terminal block, and communication device.

Figure 2(c) shows a vertical cross-sectional view of the watt-hour meter shown in Figure 1(c) as viewed from the right side, and Figure 2(d) shows a vertical cross-sectional view of the watt-hour meter shown in Figure 2(b) as viewed from the right side.

Figure 3(a) shows an oblique view of the case, and Figure 3(b) shows an oblique view of the cover.

The electricity meter has a metering device with a case 5A and a cover 11A, a communication device (upper case 23 and lower case 24 shown in FIG. 1) that is attached to the metering device and transmits the amount of electricity measured by the metering device to the outside, and a terminal block that is attached to the metering device and connects to an electric wire.

As shown in FIG. 3(a), the left and right side surfaces of the weighing device case 5A are provided with a cylindrical hole 5A1 for the rotating shaft, a closing protrusion 5A2, an opening protrusion 5A3, and a snap-fit fixing portion 5A5 having a release portion 5A4 for releasing the closed and open states of the cover 11A.

As shown in Figure 3(b), the front side of the cover 11A has a rotating shaft 11A1, cylindrical rotating shaft protrusions 11A2 on the outside of both left and right sides of the rotating shaft 11A1, a fixing recess 11A3 below the rotating shaft 11A1 that fits into the closing protrusion 5A2 to keep the cover 11A in the closed state, a release recess 11A4 as a space provided for inserting a finger between the release part and the cover when the cover is in the closed state to operate the release part, and a cover waterproof rib 11Ab above the rotating shaft 11A1.

Next, the assembly procedure for the weighing device of the first embodiment configured as described above will be described. First, in the same state as the current product, the circuit section 1, the sensor section 2, the conductor 3, the base 4, and the case 5A are assembled, and then the rotating shaft projection 11A2 of the cover 11A shown in FIG. 3(b) is fitted into the rotating shaft hole 5A1 of the case 5A shown in FIG. 3(a), thereby assembling the cover 11A to the case 5A and making the cover 11A rotatable.

Next, the top surface of the cover waterproof rib 11Ab of the cover 11A is brought into contact with the top surface of the opening protrusion 5A3 of the fixing part 5A5 of the case 5A, thereby holding the cover 11A in the open state.

Next, we will explain the procedure for assembling the metering device, communication device, and terminal block into the electricity meter.

First, as shown in Figure 1(a), lower the weighing device onto the terminal block from above.

Next, as shown in FIG. 1(b), the conductor connection screw 7 is tightened with a screwdriver to fix the conductor side terminal connection part 3b to the terminal side conductor connection part 9b, and the block mounting screw 6 is tightened with a screwdriver to fix the block mounting part 4c to the block side base mounting part 10a, thereby attaching the weighing device to the terminal block.

Next, a communication device is attached to the weighing device as shown in Figures 1(c) and 2(c).

Next, as shown in FIG. 1(d), the release portion 5A4 of the fixing portion 5A5 of the case 5A is opened to the left and right, and the top surface of the cover waterproofing rib 11Ab of the cover 11A is removed from the top surface of the opening protrusion 5A3 of the fixing portion 5A5 of the case 5A.

Next, as shown in FIG. 2(a), the cover 11A is rotated downward around the rotation shaft protrusion 11A2 of the cover 11A as an axis and lowered.

Next, as shown in Figures 2(b) and 2(d), the fixing portion 5A5 of the case 5A returns to its original position due to a restoring force, and the closing protrusion 5A2 of the fixing portion 5A5 of the case 5A engages with the fixing recess 11A3 of the cover 11A to hold the cover 11A in the closed state, thereby completing the assembly of the watt-hour meter.

When opening the cover 11A, insert your fingers into the release recess 11A4 of the cover 11A and use those fingers to spread the release portion 5A4 of the fixed portion 5A5 of the case 5A to the left and right, and release the closing protrusion 5A2 of the fixed portion 5A5 of the case 5A from the fixing recess 11A3 of the cover 11A.

Next, cover 11A is rotated upward around the rotation axis protrusion 11A2 of cover 11A to open it, and the fixing part 5A5 of case 5A returns to its original position due to the restoring force, and the upper surface of the opening protrusion 5A3 of the fixing part 5A5 of case 5A abuts against the upper surface of the cover waterproof rib 11Ab of cover 11A, thereby maintaining cover 11A in the open state.

Thus, with the electricity meter according to the first embodiment, compared to the current product, the cover 11A and the case 5A are integrated with a hinge structure, and the opening protrusion 5A3 of the fixing part 5A5 of the case 5A can hold the cover 11A in the open state, eliminating the need to transport and store the cover when it is removed, and the need to transport it when it is attached, thereby shortening the work time. Also, the cover 11A can be held in the closed state by the closing protrusion 5A2 of the fixing part 5A5 of the case 5A, eliminating the need to loosen and tighten the cover attachment screws, thereby shortening the work time.

Second Embodiment
Figures 4, 5, and 6 are perspective and cross-sectional views of an electric energy meter according to a second embodiment of the present invention. Figures 4(a) to 4(d) and 5(a) to 5(c) are assembly perspective views showing a procedure for assembling a metering device, a terminal block, and a communication device of an electric energy meter according to a second embodiment of the present invention. Figure 5(d) shows a horizontal cross-sectional view of a fixed cover mating part on the right side of the electric energy meter shown in Figure 5(b), and Figure 5(e) shows a horizontal cross-sectional view of a fixed cover mating part on the right side of the electric energy meter shown in Figure 5(c).

Figure 6(a) shows a perspective view of the case, Figure 6(b) shows a perspective view of the cover, and Figure 6(c) shows a perspective view of the fixed cover.

In the watthour meter according to the second embodiment, as compared to the watthour meter according to the first embodiment, as shown in FIG. 6(c), a fixed cover 201 is added, which has a fixed cover side sliding part 201a consisting of a convex part and a fixed part 201c having a snap-fit structure with a fixed convex part 201b, and as shown in FIG. 6(a), a cylindrical rotating shaft hole part 5B1, a closing convex part 5B2, an opening convex part 5B3, and a fixing part 5B5 having a snap-fit structure having a release part 5B4 for releasing the closed state and the open state of the cover 11B are provided on both the left and right side surfaces of the case 5B, and as shown in FIG. 6(b), a rotating shaft 11B1 is provided on the front side of the cover 11B, and cylindrical rotating shaft convex parts 1B2 and 1B3 are provided on the outside of both the left and right side surfaces of the rotating shaft 11B1. 1B2, a fixing recess 11B3 below the rotating shaft 11B1 to engage with the closing protrusion 5B2 to hold the cover 11B in the closed state, a release recess 11B4 as a space provided for inserting a finger between the release part and the cover when the cover is in the closed state to operate the release part, a cover side sliding part 11B5 consisting of a recess provided to engage with the fixed cover side sliding part 201a of the fixed cover 201 to slide the fixed cover 201 up and down, a closing recess 11B6 and an opening recess 11B7 provided to engage with the fixing protrusion 201b of the fixing part 201c of the fixed cover 201 to fix the fixed cover 201, and a cover waterproof rib 11Bb above the rotating shaft 11B1. The other configurations are the same as those of the watthour meter according to the first embodiment.

Next, the assembly procedure for the weighing device of the second embodiment configured in this manner will be described. First, in the same state as the current product, the circuit section 1, the sensor section 2, the conductor 3, the base 4, and the case 5A are assembled, and then the fixed cover side sliding section 201a of the fixed cover 201 shown in FIG. 6(c) is engaged with the cover side sliding section 11B5 of the cover 11B shown in FIG. 6(b), thereby assembling the fixed cover 201 to the cover 11B and allowing the fixed cover 201 to slide up and down.

Next, the fixed cover 201 is pressed downward so that the fixing protrusion 201b of the fixing portion 201c of the fixed cover 201 engages with the opening recess 11B7 of the cover 11B, fixing the fixed cover 201 to the bottom end and exposing the release recess 11B4 of the cover 11B.

Next, the protrusion 11B2 for the rotating shaft of the cover 11B is fitted into the hole 5B1 for the rotating shaft of the case 5B shown in FIG. 6(a) to assemble the cover 11B to the case 5B and make the cover 11B rotatable.

Next, the top surface of the cover waterproof rib 11Bb of the cover 11B is brought into contact with the top surface of the opening protrusion 5B3 of the fixing part 5B5 of the case 5B, thereby holding the cover 11B in the open state.

Next, we will explain the procedure for assembling the metering device, communication device, and terminal block into the electricity meter.

First, lower the weighing device onto the terminal block from above, as shown in Figure 4(a).

Next, as shown in FIG. 4(b), the conductor connection screw 7 is tightened with a screwdriver to fix the conductor side terminal connection part 3b to the terminal side conductor connection part 9b, and the block mounting screw 6 is tightened with a screwdriver to fix the block mounting part 4c to the block side base mounting part 10a, thereby attaching the weighing device to the terminal block.

Next, a communication device is attached to the weighing device as shown in Figure 4(c).

Next, as shown in FIG. 4(d), the release portion 5B4 of the fixing portion 5B5 of the case 5B is spread left and right to remove the top surface of the cover waterproofing rib 11Bb of the cover 11B from the top surface of the opening protrusion 5A3 of the fixing portion 5A5 of the case 5A.

Next, as shown in FIG. 5(a), rotate the cover 11B downward around the rotation shaft protrusion 11B2 of the cover 11B as an axis and lower it.

Next, as shown in Figures 5(b) and 5(d), the fixing portion 5B5 of the case 5B returns to its original position due to a restoring force, and the closing protrusion 5B2 of the fixing portion 5B5 of the case 5B engages with the fixing recess 11B3 of the cover 11B, closing the cover 11B.

Next, as shown in Figures 5(c) and 5(e), when the fixed cover 201 is pushed up with a finger, the opening recess 11B7 of the cover 11B presses the fixing protrusion 201b of the fixing part 201c of the fixed cover 201, causing the fixing part 201c to bend outward, and the fixing protrusion 201b of the fixing part 201c of the fixed cover 201 comes out of the opening recess 11B7 of the cover 11B, and the fixing protrusion 201b of the fixing part 201c of the fixed cover 201 engages with the closing recess 11B6 of the cover 11B, fixing the fixed cover 201 to the upper end, and at the same time, the fixed cover 201 covers the releasing recess 11B4 of the cover 11B and the releasing part 5B4 of the fixing part 5B5 of the case 5B.

This restricts the fixing portion 5B5 of the case 5B from being opened to the left or right, making it possible to assemble a watt-hour meter in such a way that the cover 11B cannot be easily opened.

When opening the cover 11B, the above steps can be reversed. That is, the fixed cover 201 is pressed downward to engage the fixing convex portion 201b of the fixing portion 201c of the fixed cover 201 with the opening concave portion 11B7 of the cover 11B, fixing the fixed cover 201 to the lower end and exposing the release concave portion 11B4 of the cover 11B. After this, the operation can be performed in the same way as the watt-hour meter according to the first embodiment.

In this way, with the electricity meter according to the second embodiment, compared to the first embodiment, the release portion 5B4 of the fixed portion of the case 5B is covered with the fixed cover 201, so that the cover 11B cannot be easily opened, thereby preventing tampering.

Third Embodiment
7 is a perspective view of an energy meter according to a third embodiment of the present invention, in which Fig. 7(a) shows a direction in which a metering device with a communication device attached thereto is attached to a terminal block, Fig. 7(b) shows an energy meter with a metering device, a communication device, and a cover in the absence of a terminal block, and Fig. 7(c) shows a perspective view of the cover.

The watthour meter according to the third embodiment is different from the watthour meter according to the first embodiment in that it is provided with a communication device mounting portion 11C8 for mounting a communication device to the cover 11C, and a fixing portion 11C10 having a snap-fit structure and a fixing protrusion 11C9. The other configurations are the same as those of the watthour meter according to the first embodiment.

The communication device can be attached to the communication device attachment portion 11C8 shown in FIG. 7(c), and fixed by the fixing protrusion 11C9 of the fixing portion 11C10 as shown in FIG. 7(a).

The third embodiment of the electricity meter configured in this way allows the communication device to be attached to the cover 11C, which, compared to current products, eliminates the need for removing the communication device, transporting and storing the communication device, transporting the communication device when it is installed, and installing the communication device, thereby reducing work time. Also, compared to current products, the meter can be carried assembled with the metering device, communication device, and cover 11C, so no extra parts are added for replacing the metering device.

(Fourth embodiment)
Fig. 8 is a perspective view of an electricity meter according to a fourth embodiment of the present invention, Fig. 8(a) shows a direction in which a metering device with a communication device attached is attached to a terminal block, Fig. 8(b) shows an electricity meter with a metering device, a communication device, a cover and a fixed cover in the absence of a terminal block, and Fig. 8(c) shows a perspective view of the cover.

The watthour meter according to the fourth embodiment is different from the watthour meter according to the second embodiment in that it further includes a communication device mounting portion 11D8 for mounting a communication device to the cover 11D, and a fixing portion 11D10 having a snap-fit structure and a fixing protrusion 11D9. The other configurations are the same as those of the watthour meter according to the second embodiment.

The communication device can be attached to the communication device attachment portion 11D8 shown in FIG. 8(c), and fixed by the fixing protrusion 11D9 of the fixing portion 11D10.

The fourth embodiment of the watt-hour meter configured in this manner allows the communication device to be attached to the cover 11D, which, compared to current products, eliminates the need for removing the communication device, transporting and storing the communication device, transporting the communication device when installing it, and installing the communication device, thereby reducing work time. Also, compared to current products, the metering device, communication device, and cover 11D can be assembled and carried around, so no extra parts are added when replacing the metering device.

REFERENCE SIGNS LIST 1 Circuit section 1a Display section 1b Communication device connection section 1c Open/close detection section 1d Conductor connection section 1e Sensor connection section 1f Base mounting section 2 Sensor section 2a Sensor side circuit connection section 3 Conductor 3a Conductor side circuit connection section 3b Conductor side terminal connection section 4 Base 4a Communication device connection section through hole
[0033] 4b Communication device mounting portion 4c Block mounting portion 4d Open/close detection portion through hole 4e Case mounting portion 4f Conductor through hole 4g Circuit mounting portion 5, 5A, 5B Case 5a, 5Aa, 5Ba Display window 5b, 5Ab, 5Bb Case side base mounting portion 5c, 5Ac, 5Bc Case waterproof rib storage portion 5d, 5Ad, 5Bd Case waterproof rib 5e, 5Ae, 5Be Case side fixing screw mounting portion 5A1, 5B1 Rotating shaft hole portion 5A2, 5B2 Closing convex portion 5A3, 5B3 Opening convex portion 5A4, 5B4 Release portion 5A5, 5B5 Fixing portion 6 Block mounting screw 7 Conductor connection screw 8 Electric wire mounting screw 9 Terminal 9a Electric wire storage portion 9b Terminal side conductor connection portion 10 Block 10a Block side base mounting portion 10b Cover mounting female thread portion 10c Wire hole 10d Terminal mounting portion 10e Block side fixing screw mounting portion 10f Block waterproof rib storage portion 11, 11A, 11B, 11C, 11D Cover 11a, 11Aa, 11Ba, 11Ca, 11Da Detection convex portion 11b, 11Ab, 11Bb, 11Cb, 11Db Cover waterproof rib 11A1, 11B1, 11C1, 11D1 Rotating shaft 11A2, 11B2, 11C2, 11D2 Rotating shaft convex portion 11A3, 11B3, 11C3, 11D3 Fixing concave portion 11A4, 11B4, 11C4, 11D4 Release concave portion 11B5, 11D5 Cover side sliding portion 11B6, 11D6 Closing concave portion 11B7, 11D7 Opening recess 11C8, 11D8 Communication device mounting portion 11C9, 11D9 Fixing protrusion 11C10, 11D10 Fixing portion 12 Cover mounting screw 21 Cable 21a Weighing device connection portion 22 LED light guide portion 23 Upper case 24 Lower case 24a Weighing device mounting portion 201 Fixed cover 201a Fixed cover side sliding portion 201b Fixed protrusion 201c Fixed portion

Claims (3)

The power supply device includes a metering device having a case and a cover, 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, and a terminal block attached to the metering device and configured to connect to an electric wire,
A snap-fit structure fixing portion having a cylindrical hole for a rotating shaft, a closing protrusion, an opening protrusion, and a release portion for releasing the cover from the closed state and the open state is provided on both left and right side surfaces of the case, a rotating shaft is provided on the front side of the cover, cylindrical rotating shaft protrusions are provided on the outside of both left and right side surfaces of the rotating shaft, a fixing recess for engaging with the closing protrusion below the rotating shaft to hold the cover in a closed state, a release recess as a space provided for inserting a finger between the release portion and the cover to operate the release portion when the cover is in a closed state, and a cover waterproofing rib is provided above the rotating shaft,
a rotating shaft protrusion of the cover engages with the rotating shaft hole of the case to make the cover rotatable, an upper surface of the cover waterproofing rib abuts against the upper surface of the opening protrusion to hold the cover in an open state, the metering device is attached to the terminal block, and after the communication device is attached, the release portion is spread left and right to remove the upper surface of the cover waterproofing rib from the upper surface of the opening protrusion, the cover is rotated downward around the rotating shaft protrusion as an axis and lowered, the closing protrusion engages with the fixing recess to hold the cover in a closed state, and the metering device is attached to the terminal block. A cover side sliding part consisting of a recess, a closing recess, and an opening recess are provided on the outer side of both left and right sides of the cover, and a fixed cover is provided having a fixed cover side sliding part consisting of a protrusion and a fixed part having a snap-fit structure having a fixing protrusion,
The electricity meter of claim 1, characterized in that the fixed cover side sliding part is engaged with the cover side sliding part to make the fixed cover slidable up and down, and when the cover is in a closed state, the fixed cover can be slid downward to engage the fixed convex part with the opening concave part to expose the release concave part and the release part, making the release part operable and bringing the cover into an open state, and the fixed cover can be slid upward to engage the fixed convex part with the closing concave part to cover the release concave part and the release part with the fixed cover, making the release part unable to be operated and restricting the cover from being in an open state. The watt-hour meter according to claim 1 or 2, characterized in that the cover is provided with a communication device mounting portion for mounting the communication device, and a fixing portion having a snap-fit structure with a fixing protrusion, the communication device is attached to the communication device mounting portion, and the communication device is fixed by the fixing protrusion of the cover.

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