Electric energy meter

Abstract

To shorten a work time for removing and mounting a cover.SOLUTION: A watt-hour comprises: a metering device with a case and a cover; a communication device; and a terminal block. On the right and left side surfaces of the case, there are provided a cylindrical hole portion for a revolving shaft and snap fit structure having a protrusion for closing, a protrusion for opening and a release portion for releasing the closed and open states of the cover. On the front side of the cover, there are provided a revolving shaft, a cylindrical protrusion for the revolving shaft on the outside of right and left side surfaces of the revolving shaft, a recess for fixation on the down side of the revolving shaft, a recess for release, and a cover waterproofing rib on the upside of the revolving shaft. The metering device is attached to the terminal block while the top face of the cover waterproofing rib of the cover abuts on the top face of the protrusion for opening and the cover is held in a closed state. The release portion is laterally expanded and the cover is lowered down while being rotated around the protrusion for the revolving shaft as an axis, with the protrusion for closing engaged with the recess for fixation and the cover held in a closed state.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] 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. Fig. 9(a) to Fig. 9(d) are process diagrams showing the procedure for assembling the metering device, the terminal block, the communication device, and the cover in a conventional watt-hour meter. Fig. 9(a) shows the direction in which the metering device is attached to the terminal block, Fig. 9(b) shows the state in which the terminal block is attached to the metering device, Fig. 9(c) shows the state in which the communication device is attached to the metering device, and Fig. 9(d) shows the watt-hour meter completed by attaching the cover to the terminal block. Figs. 10(a) and (b) show exploded views of a conventional watt-hour meter. Fig. 11(a) shows the appearance of a conventional communication device for a watt-hour meter, and Fig. 11(b) shows a metering device attachment part 24a provided on the communication device.

[0003] As shown in Figures 10(a) and 10(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 is connected 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 is connected to the conductor connection section 1d of the circuit section 1 to supply power and a conductor side terminal connection section 3b that is connected 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.

[0004] The communication device has a metering device connection part 21a and a metering device mounting part 24a, as shown in Fig. 11(a) and Fig. 11(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. 10(a) and Fig. 10(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.

[0005] The procedure for assembling the thus configured metering device, communication device, terminal block, and cover to the watt-hour meter is as follows: First, as shown in Fig. 9(a), the metering device is placed above the terminal block and moved downward, and then, as shown in Fig. 9(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.

[0006] 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. 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 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.

[0007] 10(d), the cover waterproof rib 11b of the cover 11 is inserted into the case waterproof rib storage portion 5c of the case 5, and the cover mounting screw 12 provided on the cover 11 is attached 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, the above-mentioned assembly procedure for the watt-hour meter is carried out in reverse.

[0008] First, for the old and new watthour meters, the cover mounting screws 12 are loosened to remove the cover 11, then the watthour meter is 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 the metering device is 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 the metering device is 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.

[0009] Thus, when replacing a watt-hour meter, the work of loosening the screws and transporting the cover when removing it occurs twice, and the work of transporting and tightening the 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.

[0010] 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]

[0011] [Patent Document 1] Patent No. 4991340 Summary of the Invention [Problem to be solved by the invention]

[0012] When replacing a watt-hour meter, the tasks of loosening the cover mounting screws, transporting and storing the cover, transporting the cover when installing the cover, and tightening the cover mounting screws are required, which lengthens the work time and causes high labor costs.In addition, the tasks of removing the communication device, transporting and storing the communication device, transporting the communication device when installing the communication device, and installing the communication device are required, which lengthens the work time and causes high labor costs.

[0013] The present invention provides a watthour meter that can reduce the work time required for removing and attaching a cover, and can reduce installation work costs. [Means for solving the problem]

[0014] In order to solve the above problems, 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 electric power measured by the measuring device to the outside, and a terminal block attached to the measuring device and connected to an electric wire, the case being provided on both left and right side surfaces with a fixing part having a snap-fit ​​structure having a cylindrical hole for a rotating shaft, a closing protrusion, an opening protrusion, and a release part for releasing the closed state and the open state of the cover, the case being provided with a rotating shaft on the front side of the cover, cylindrical rotating shaft protrusions on the outside of both left and right side surfaces of the rotating shaft, a fixing recess below the rotating shaft for engaging with the closing protrusion to hold the cover in a closed state, and a finger being inserted between the release part and the cover when the cover is in a closed state. a release recess as a space for operating the release portion, and a cover waterproof rib above the rotating shaft; the rotating shaft convex portion of the cover engages with the rotating shaft hole portion of the case to make the cover rotatable; the weighing device is attached to the terminal block with the upper surface of the cover waterproof rib abutting against the upper surface of the opening convex portion to hold the cover in the open state; and after the communication device is attached, the release portion is spread left and right to remove the upper surface of the cover waterproof rib from the upper surface of the opening convex portion, the cover is rotated downward around the rotating shaft convex portion as an axis and lowered, the closing convex portion engages with the fixing concave portion to hold the cover in the closed state, and the weighing device is attached to the terminal block.

[0015] The invention of claim 2 is characterized in that a cover side sliding part consisting of a recess, a closing recess, and an opening recess are provided on the outer left and right sides of the cover, a fixed cover having a fixed cover side sliding part consisting of a convex part and a fixed part of a snap-fit ​​structure having a fixed convex part is provided, the fixed cover side sliding part is engaged with the cover side sliding part to enable the fixed cover to slide 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 recess to expose the release recess and the release part, making the release part operable and bringing the cover into an open state, and by sliding the fixed cover upward and engaging the fixed convex part with the closing recess, the release recess and the release part are covered by the fixed cover, making the release part unable to be operated and restricting the cover from being in an open state.

[0016] 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, the communication device is attached to the communication device mounting portion, and the communication device is fixed by the fixing protrusion of the cover. Effect of the Invention

[0017] 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, so there is no need to transport and store the cover when it is removed, and there is no need to transport the cover when it is attached, which shortens the work time. Also, the cover can be held in the closed state by the closing convex part of the fixing part of the case, so there is no need to loosen and tighten the cover attachment screws, which shortens the work time.

[0018] According to the invention of claim 2, compared to claim 1, by covering the release portion of the fixed portion of the case with a fixed cover, the cover cannot be easily opened, thereby preventing tampering.

[0019] According to the invention of claim 3, the communication device can be attached to the cover, which 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 the work time. Also, compared to the current product, the weighing device, the communication device, and the cover can be assembled and carried around, so no extra parts are added for replacing the weighing device. [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] 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; [Diagram 3] FIG. 1 is a perspective view of a case and a cover of a watt-hour meter according to a first embodiment of the present invention. [Figure 4] FIG. 11 is an assembled perspective view of a watt-hour meter according to a second embodiment of the present invention. [Diagram 5] 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. [Figure 6] FIG. 11 is a perspective view of a case, a cover, and a fixing cover of a watt-hour meter according to a second embodiment of the present invention. [Figure 7] 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 cover. [Figure 8] 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. [Figure 9] FIG. 1 is a perspective view of a conventional watt-hour meter. [Figure 10] FIG. 1 is an exploded view of a conventional watt-hour meter. [Figure 11] 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) 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.

[0023] 1(a) to 1(d) and 2(a) to 2(b) are assembly perspective views showing the procedure for assembling a weighing device, a terminal block, and a communication device.

[0024] FIG. 2(c) shows a vertical cross-sectional view of the watt-hour meter shown in FIG. 1(c) as viewed from the right side, and FIG. 2(d) shows a vertical cross-sectional view of the watt-hour meter shown in FIG. 2(b) as viewed from the right side.

[0025] FIG. 3(a) shows a perspective view of the case, and FIG. 3(b) shows a perspective view of the cover.

[0026] The electricity meter includes a metering device having a case 5A and a cover 11A, a communication device (upper case 23 and lower case 24 shown in FIG. 1) attached to the metering device and transmitting the amount of electricity measured by the metering device to the outside, and a terminal block attached to the metering device and connected to an electric wire.

[0027] As shown in FIG. 3(a), the left and right side surfaces of the case 5A of the weighing device are provided with a fixing portion 5A5 having a snap-fit ​​structure, the fixing portion 5A5 having a cylindrical hole 5A1 for a rotating shaft, a closing protrusion 5A2, an opening protrusion 5A3, and a release portion 5A4 for releasing the closed and open states of the cover 11A.

[0028] As shown in Figure 3(b), on the front side of the cover 11A, there are 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 to engage with the closing protrusion 5A2 to keep the cover 11A in the closed state, a release recess 11A4 as a space for inserting a finger between the release portion and the cover to operate the release portion when the cover is in the closed state, and a cover waterproof rib 11Ab above the rotating shaft 11A1.

[0029] Next, the assembly procedure of the weighing device of the first embodiment thus configured 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) to assemble the cover 11A to the case 5A and make the cover 11A rotatable.

[0030] Next, the upper surface of the cover waterproof rib 11Ab of the cover 11A is brought into contact with the upper surface of the opening protrusion 5A3 of the fixing portion 5A5 of the case 5A, thereby keeping the cover 11A in the open state.

[0031] Next, the procedure for assembling the metering device, communication device, and terminal block into the watt-hour meter will be described.

[0032] First, as shown in Figure 1(a), the weighing device is lowered onto the terminal block from above.

[0033] Next, as shown in FIG. 1(b), the conductor connection screw 7 is tightened with a screwdriver to fix the conductor side terminal connection portion 3b to the terminal side conductor connection portion 9b, and the block mounting screw 6 is tightened with a screwdriver to fix the block mounting portion 4c to the block side base mounting portion 10a, thereby attaching the weighing device to the terminal block.

[0034] Next, as shown in Fig. 1(c) and Fig. 2(c), a communication device is attached to the weighing device.

[0035] Next, as shown in FIG. 1(d), the release portion 5A4 of the fixing portion 5A5 of the case 5A is opened left and right to remove the upper surface of the cover waterproofing rib 11Ab of the cover 11A from the upper surface of the opening protrusion 5A3 of the fixing portion 5A5 of the case 5A.

[0036] Next, as shown in FIG. 2(a), the cover 11A is rotated downward about the rotation shaft protrusion 11A2 of the cover 11A as an axis and lowered.

[0037] 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 maintain the cover 11A in the closed state, thereby completing the assembly of the electricity meter.

[0038] When opening the cover 11A, fingers are inserted into the release recess 11A4 of the cover 11A and the release portion 5A4 of the fixed portion 5A5 of the case 5A is spread to the left and right with the fingers to remove the closing protrusion 5A2 of the fixed portion 5A5 of the case 5A from the fixing recess 11A3 of the cover 11A.

[0039] Next, cover 11A is rotated upward around the rotation axis protrusion 11A2 of cover 11A as an axis to open it, and the fixed portion 5A5 of case 5A returns to its original position due to its restoring force, and the upper surface of the opening protrusion 5A3 of the fixed portion 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.

[0040] Thus, according to the watthour meter of 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 the cover 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.

[0041] Second embodiment 4, 5, and 6 are perspective and cross-sectional views of an electricity meter according to a second embodiment of the present invention. Figs. 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 electricity meter according to a second embodiment of the present invention. Fig. 5(d) shows a horizontal cross-sectional view of a fixed cover mating portion on the right side of the electricity meter shown in Fig. 5(b), and Fig. 5(e) shows a horizontal cross-sectional view of a fixed cover mating portion on the right side of the electricity meter shown in Fig. 5(c).

[0042] FIG. 6(a) shows a perspective view of the case, FIG. 6(b) shows a perspective view of the cover, and FIG. 6(c) shows a perspective view of the fixed cover.

[0043] 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 having a fixed cover side sliding portion 201a consisting of a convex portion and a fixed portion 201c having a snap-fit ​​structure with a fixed convex portion 201b is added, and as shown in FIG. 6(a), a cylindrical rotating shaft hole portion 5B1, a closing convex portion 5B2, an opening convex portion 5B3, and a fixing portion 5B5 having a snap-fit ​​structure having a release portion 5B4 for releasing the closed state and the open state of the cover 11B are provided on both 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 portions 1B2 and 1B3 are provided on the outside of both left and right side surfaces of the rotating shaft 11B1. 1B2, a fixing recess 11B3 below the rotating shaft 11B1 for engaging 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 for engaging 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 for engaging 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 provided above the rotating shaft 11B1. The other configurations are the same as those of the watthour meter according to the first embodiment.

[0044] Next, the assembly procedure of the weighing device of the second embodiment thus configured 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 201 is assembled to the cover 11B by fitting the fixed cover side sliding section 201a of the fixed cover 201 shown in Fig. 6(c) to the cover side sliding section 11B5 of the cover 11B shown in Fig. 6(b), and the fixed cover 201 is made slidable up and down.

[0045] Next, the fixed cover 201 is pressed downward so that the fixing convex portion 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 lower end and exposing the release recess 11B4 of the cover 11B.

[0046] Next, the rotary shaft projection 11B2 of the cover 11B is fitted into the rotary shaft hole 5B1 of the case 5B shown in FIG. 6(a) to assemble the cover 11B to the case 5B and make the cover 11B rotatable.

[0047] Next, the upper surface of the cover waterproof rib 11Bb of the cover 11B is brought into contact with the upper surface of the opening protrusion 5B3 of the fixing portion 5B5 of the case 5B, thereby keeping the cover 11B in the open state.

[0048] Next, the procedure for assembling the metering device, communication device, and terminal block into the watt-hour meter will be described.

[0049] First, as shown in FIG. 4(a), the measuring device is lowered onto the terminal block from above.

[0050] Next, as shown in FIG. 4(b), the conductor connection screw 7 is tightened with a screwdriver to fix the conductor side terminal connection portion 3b to the terminal side conductor connection portion 9b, and the block mounting screw 6 is tightened with a screwdriver to fix the block mounting portion 4c to the block side base mounting portion 10a, thereby attaching the weighing device to the terminal block.

[0051] Next, as shown in FIG. 4(c), a communication device is attached to the weighing device.

[0052] 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 waterproof rib 11Bb of the cover 11B from the top surface of the opening protrusion 5A3 of the fixing portion 5A5 of the case 5A.

[0053] Next, as shown in FIG. 5(a), the cover 11B is rotated downward around the rotation shaft protrusion 11B2 of the cover 11B as an axis and lowered.

[0054] 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 to close the cover 11B.

[0055] 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 convex portion 201b of the fixing part 201c of the fixed cover 201, causing the fixing part 201c to bend outward, and the fixing convex portion 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 convex portion 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.

[0056] This restricts the operation of opening the fixing portion 5B5 of the case 5B to the left or right, thereby making it possible to assemble the watt-hour meter in such a manner that the cover 11B cannot be easily put into an open state.

[0057] When opening the cover 11B, the above procedure can be reversed. That is, the fixed cover 201 is pushed 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, the fixed cover 201 is fixed to the lower end, and the release concave portion 11B4 of the cover 11B is exposed. After this, the operation can be performed in the same manner as the watthour meter according to the first embodiment.

[0058] Thus, according to the electricity meter of the second embodiment, compared to the first embodiment, by covering the release portion 5B4 of the fixed portion of the case 5B with the fixed cover 201, it is possible to prevent tampering since the cover 11B cannot be easily opened.

[0059] (Third embodiment) Fig. 7 is a perspective view of an electricity meter according to a third embodiment of the present invention. Fig. 7(a) shows the direction in which a metering device with a communication device attached is attached to a terminal block, Fig. 7(b) shows an electricity 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.

[0060] 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 on a 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.

[0061] 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).

[0062] According to the watt-hour meter of the third embodiment thus configured, the communication device can be attached to the cover 11C, which 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 shortening the work time. Also, compared to the current product, the meter, communication device, and cover 11C can be assembled and carried around, so no extra parts are added for replacing the meter.

[0063] (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 the 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.

[0064] The watthour meter according to the fourth embodiment is further provided with a communication device mounting portion 11D8 for mounting a communication device on the cover 11D, and a fixing portion 11D10 having a snap-fit ​​structure and a fixing protrusion 11D9, in comparison with the watthour meter according to the second embodiment. The other configurations are the same as those of the watthour meter according to the second embodiment.

[0065] 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.

[0066] According to the watthour meter of the fourth embodiment thus configured, the communication device can be attached to the cover 11D, which 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 shortening the work time. Also, compared to the current product, the meter, communication device, and cover 11D can be assembled and carried around, so no extra parts are added for replacing the meter. [Explanation of symbols]

[0067] 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. Bass 4a Communication device connection hole 4b Communication device mounting section 4c Block mounting part 4d Open / close detection hole 4e Case mounting part 4f Conductor hole 4g Circuit mounting part 5,5A,5B Case 5a, 5Aa, 5Ba display window 5b, 5Ab, 5Bb Case side base mounting part 5c, 5Ac, 5Bc Case Waterproof Rib Storage Area 5d, 5Ad, 5Bd Case Waterproof Ribs 5e, 5Ae, 5Be Case side fixing screw mounting part 5A1, 5B1 Rotating shaft hole 5A2, 5B2 Closing protrusion 5A3,5B3 Opening protrusion 5A4,5B4 Release part 5A5,5B5 Fixed 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, 11A, 11B, 11C, 11D Cover 11a, 11Aa, 11Ba, 11Ca, 11Da Detection convex part 11b, 11Ab, 11Bb, 11Cb, 11Db Cover waterproof rib 11A1, 11B1, 11C1, 11D1 Rotating shaft 11A2, 11B2, 11C2, 11D2 Rotating shaft protrusions 11A3, 11B3, 11C3, 11D3 Fixing recess 11A4, 11B4, 11C4, 11D4 Release recess 11B5, 11D5 Cover side sliding part 11B6, 11D6 Closing recess 11B7, 11D7 Opening recess 11C8, 11D8 Communication device mounting section 11C9, 11D9 Fixed protrusion 11C10,11D10 Fixed part 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 201 Fixed cover 201a Fixed cover side sliding part 201b Fixed protrusion 201c Fixed part

Claims

1. 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.

2. 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.

3. 3. The electricity 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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