Electric energy meter

Abstract

To provide a watt-hour meter for easily mounting and removing electric wires having various thicknesses by pressing them to a conductor with a spring by the force equal to or more than a prescribed value.SOLUTION: A watt-hour meter includes a conductor 3A having an electric wire contacting part 3A1, and a block 4A having a conductor mounting part 4Ae, a second conductor mounting part 4A2, an electric wire penetration hole 4Ad, and an insulation insertion part 4A1, and also includes an insulator 101 having a conductor penetration hole, a spring insertion part, a pushing surface, and a stationary plate mounting part on both the left and right side faces. A stationary plate is inserted into and fixed to the stationary plate mounting part. The insulator in which a spring is inserted into the spring insertion part is inserted into the insulation insertion part from a surface in which the spring insertion part is located. A conductor is inserted into the conductor mounting part, the conductor penetration hole, and the second conductor mounting part and is assembled. The electric wire contacting part and the stationary plate are in contact. The insulator is slidable in an insertion direction of the insulation insertion part and the stationary plate is pressed and a spring 103 is deflected by pushing the pushing surface of the insulator in the insertion direction. The electric wire is inserted between the electric wire contacting part and the stationary plate through the electric wire penetration hole, and then pushing of the pushing surface is stopped, and the electric wire is fixed when the stationary plate pressed by the spring presses the electric wire to the electric wire contacting part.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 block and a cover. Figures 12(a) to 12(d) show a conventional watt-hour meter. Figure 12(a) shows the watt-hour meter, Figure 12(b) shows the meter with the cover removed, Figure 12(c) shows the meter with wires attached, and Figure 12(d) shows a cross-sectional view of Figure 12(c).

[0003] 13(a) and 13(b) show exploded views of a conventional watt-hour meter. As shown in FIG. 13(a) and FIG. 13(b), the watt-hour meter is composed of a circuit section 1 having a display section 1a for displaying the amount of watt-hour, a conductor connection section 1b, a sensor connection section 1c, and a block attachment section 1d, a sensor section 2 having a sensor side circuit connection section 2a connected to the sensor connection section 1c of the circuit section 1 and measuring the current, a conductor 3 having a conductor side circuit connection section 3a for connecting to the conductor connection section 1b of the circuit section 1 to supply power, an electric wire storage section 3b, and an electric wire attachment screw 6, a block 4 having a case attachment section 4a, a circuit attachment section 4b, a female threaded section 4c for attaching a cover, an electric wire through hole 4d, a conductor attachment section 4e, and a block side fixing screw attachment section 4f, and a case 5 for storing them and having a display window 5a, a case side base attachment section 5b, a case waterproof rib storage section 5c, and a case side fixing screw attachment section 5d.

[0004] The cover is composed of a cover 7 equipped with a waterproof rib 7a and a cover mounting screw 8. The procedure for attaching an electric wire to an electricity meter configured in this way will be described below. First, as shown in Fig. 12(b), the cover mounting screw 8 is loosened with a screwdriver to remove the cover 7, and the electric wire mounting screw 6 is loosened with a screwdriver.

[0005] Then, as shown in Figures 12(c) and 12(d), the electric wire 9 is inserted into the electric wire storage section 3b of the conductor 3 through the electric wire passing hole 4d of the block 4, and the electric wire mounting screw 6 is tightened with a screwdriver to fix the electric wire 9 to the conductor 3, completing the installation.

[0006] One reference document describes an electricity meter that is characterized in that the electricity meter body has an electric wire connection section for connecting electric wires, and the electric wire connection section has a number of wire storage sections into which the electric wires are inserted, electric wire mounting screws that electrically connect the electric wires inserted into each wire storage section to the conductor, and partition walls that separate the insertion openings of each wire storage section, thereby reliably preventing parts of the loose electric wires from going into adjacent wire storage sections and preventing accidents such as short circuits. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 4342067 Summary of the Invention [Problem to be solved by the invention]

[0008] When installing an electricity meter, the electric wire is inserted into the wire storage section of the conductor, and then the wire mounting screw is tightened with a screwdriver to bring the wire and conductor into close contact and electrically connect them. However, the tightening of the wire mounting screw is done manually, and the amount of tightening of the wire mounting screw varies depending on the thickness of the wire, resulting in variations in the tightening force.

[0009] In addition, because wire mounting screws can loosen over time and cause heat generation or fire, the system is designed to use two wire mounting screws to fasten each wire. As a result, the time required to fasten the wire mounting screws is equal to the number of wires x two wire mounting screws, and the installation costs remain unchanged.

[0010] The object of the present invention is to provide an electricity meter that can be pressed against a conductor with a force greater than or equal to a specified value using a spring for electric wires of various thicknesses, and can easily attach and detach electric wires, thereby reducing the time required for installation and removal. [Means for solving the problem]

[0011] In order to solve the above problem, claim 1 of the present invention provides a block having a plate-shaped conductor having an electric wire abutting portion which is a flat surface against which an electric wire abuts, a conductor mounting portion which is a square hole into which the conductor is inserted and fixed, a second conductor mounting portion which is a recess for fixing the tip of the electric wire abutting portion of the conductor, an electric wire passing hole which is a square hole provided in contact with the flat surface which is the electric wire abutting portion of the conductor near the second conductor mounting portion, and an insulation insertion portion which is a recess which is open on the opposite side to the flat surface which is the electric wire abutting portion and is provided between the conductor mounting portion and the second conductor mounting portion, The insulator has a conductor through hole which is a square hole, a spring insertion portion which is a hole provided in the front-rear direction perpendicular to the conductor through hole and penetrating to the conductor through hole, a push-in surface which is a surface provided on the opposite side of the spring insertion portion, and a fixed plate attachment portion which is a square hole provided at the end of the conductor through hole on the spring insertion portion side in a manner perpendicular to the conductor through hole and the spring insertion portion and penetrating both left and right side surfaces, a spring which is inserted into the spring insertion portion of the insulator, and a fixed plate which is inserted into the fixed plate attachment portion of the insulator and pressed by the spring, and the fixed plate is inserted into the fixed plate attachment portion of the insulator. and fixed in place, the insulator with the spring inserted into the spring insertion portion of the insulator is inserted from the surface of the insulator where the spring insertion portion is located through the open surface of the insulation insertion portion of the block, and the conductor is inserted in order into the conductor mounting portion of the block, the conductor through hole of the insulator, and the second conductor mounting portion of the block, and assembled, in an initial state, the spring presses the fixing plate so that the electric wire abutment portion of the conductor and the fixing plate are in abutting state, the insulator is slidable in the insertion direction of the insulation insertion portion, and the electric wire is attached by passing it through the electric wire through hole of the block. When inserting the wire into the block, the pushing surface of the insulator is pushed in the insertion direction, whereby the fixed plate fixed to the insulator is also pushed and moved, and the spring is also pushed by the fixed plate to bend, creating a space between the wire abutment portion of the conductor and the fixed plate. After the wire is inserted through the wire-passing hole of the block into the space created between the wire abutment portion of the conductor and the fixed plate, pushing the pushing surface of the insulator in the insertion direction is stopped, and the fixed plate, pushed by the spring, presses the wire against the wire abutment portion of the conductor, thereby fixing the wire.

[0012] The invention of claim 2 is characterized in that a convex portion is provided on the surface of the fixing plate that abuts against the electric wire, and the fixing plate attachment portion consists of a hole that is formed in a shape that penetrates both the left and right side surfaces and is shaped to avoid the convex portion when the fixing plate is inserted, and when the electric wire is passed through the electric wire-passing hole of the block to attach the electric wire, by pressing the pushing surface of the insulator in the insertion direction, the fixing plate fixed to the insulator is also pushed and moved and the spring is also bent, generating a space between the electric wire abutment portion of the conductor and the fixing plate, and after the electric wire is inserted through the electric wire-passing hole of the block into the space generated between the electric wire abutment portion of the conductor and the convex portion of the fixing plate, by stopping pressing the pushing surface of the insulator in the insertion direction, the fixing plate pressed by the spring and the convex portion press the electric wire against the electric wire abutment portion, thereby fixing the electric wire.

[0013] The invention of claim 3 provides a first recess on the second conductor mounting portion side of the open side of the insulation insertion portion of the block, and a second recess on the conductor mounting portion side of the open side of the insulation insertion portion of the block, and provides insulation-side sliding portions that become convex portions on both left and right side surfaces of the push-in surface side of the insulator, and provides a fixed part having a sliding surface consisting of a first convex portion and a second convex portion in the up-down direction and a plurality of steps on the front side, and by fitting the fixed-side sliding portion into the insulation-side sliding portion, the fixed part becomes slidable on the insulator, and when the electric wire is passed through the electric wire passing hole of the block to attach the electric wire, by pressing the push-in surface of the insulator in the insertion direction, the fixed plate fixed to the insulator is also pressed and moved, and the spring is also pressed by the fixed plate to bend, and a space is generated between the electric wire abutment portion of the conductor and the fixed plate, and then the fixed part is moved. The sliding surface of the part is operated in a vertical direction with a finger to slide the fixed part, and the first convex portion of the fixed part is fitted into the first concave portion of the block, and at the same time, the second convex portion of the fixed part is fitted into the second concave portion of the block, thereby maintaining a state in which a space is generated between the electric wire abutment portion of the conductor and the fixed plate, and the electric wire is inserted into the space generated between the electric wire abutment portion of the conductor and the fixed plate through the electric wire passing hole of the block, and then the sliding surface of the fixed part is operated in a vertical direction with a finger to slide the fixed part, and the first convex portion of the fixed part is removed from the first concave portion of the block, and at the same time, the second convex portion of the fixed part is removed from the second concave portion of the block, and the fixed plate pressed by the spring presses the electric wire against the electric wire abutment portion of the conductor, thereby fixing the electric wire. Effect of the Invention

[0014] According to the invention of claim 1, the wire is pressed against the conductor by the fixing plate using a spring, so the pressing force can be made greater than the specified value, there is no significant variation, and the work time can be significantly reduced compared to the tightening work time required for the current product, which requires two screws. This improves the workability of the watt-hour meter installation work while reducing costs.

[0015] According to the invention of claim 2, the fixing plate presses the electric wire against the conductor using a spring, but the force is concentrated on the protrusions on the fixing plate, which bite into the inside of the electric wire, preventing the electric wire from slipping off.

[0016] According to the invention of claim 3, there is no need to keep pressing the insulator, and the fixing part maintains a space between the conductor and the fixing plate, allowing the electric wire to be inserted, thereby improving the workability of installing the electricity meter. [Brief description of the drawings]

[0017] [Figure 1] 1 is a perspective view and a partial cross-sectional view of a watt-hour meter according to a first embodiment of the present invention; [Diagram 2] 1 is a 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 an exploded view of a watt-hour meter according to a first embodiment of the present invention and a perspective view of an insulator. [Figure 4] 1A and 1B are a perspective view and a partial cross-sectional view of a block of a watt-hour meter according to a first embodiment of the present invention; [Diagram 5] 5A and 5B are a 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 an insulator and a fixing plate of a watt-hour meter according to a second embodiment of the present invention. [Figure 7] 11A and 11B are a perspective view and a partial cross-sectional view of a watt-hour meter according to a third embodiment of the present invention. [Figure 8] 11A and 11B are a perspective view and a partial cross-sectional view of a watt-hour meter according to a third embodiment of the present invention. [Figure 9] FIG. 11 is a partial perspective view of a watt-hour meter according to a third embodiment of the present invention. [Figure 10] 13A and 13B are a perspective view and a partial cross-sectional view of a block of a watt-hour meter according to a third embodiment of the present invention. [Figure 11] FIG. 11 is a perspective view of an insulator and a fixing part of a watt-hour meter according to a third embodiment of the present invention. [Figure 12] FIG. 1 is a perspective view of a conventional watt-hour meter. [Figure 13]FIG. 1 is an exploded view of the amount of power in a conventional system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] 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.

[0019] (First embodiment) Fig. 1(a) to Fig. 1(d) and Fig. 2(a) to Fig. 2(d) are perspective views and partial cross-sectional views of a watt-hour meter according to a first embodiment of the present invention. Fig. 1(a) is a perspective view of the watt-hour meter showing a state in which an insulator is attached to a block, and Fig. 1(b) is a partial cross-sectional view of the vicinity of the insulator of the watt-hour meter shown in Fig. 1(a). Fig. 1(c) is a perspective view of the watt-hour meter showing a state in which the insulator has been pushed in, and Fig. 1(d) is a partial cross-sectional view of the vicinity of the insulator of the watt-hour meter shown in Fig. 1(c).

[0020] Fig. 2(a) shows the state in which the insulator is pushed in and the wire is inserted through the wire-passing hole in the block into the space between the wire contact part and the fixed plate, Fig. 2(b) shows a partial cross-sectional view of the vicinity of the insulator of the watt-hour meter shown in Fig. 2(a), Fig. 2(c) shows the state in which the insulator is no longer pushed in and the fixed plate pressed by the spring presses the wire against the wire contact part, and Fig. 2(d) shows a partial cross-sectional view of the vicinity of the insulator of the watt-hour meter shown in Fig. 2(c).

[0021] Fig. 3(a) is an exploded view of the watt-hour meter according to the first embodiment of the present invention. Figs. 3(b) and 3(c) are perspective views of an insulator of the watt-hour meter according to the first embodiment of the present invention. Fig. 4(a) is a perspective view of a block of the watt-hour meter according to the first embodiment of the present invention. Fig. 4(b) is a partial cross-sectional view showing an insulation insertion portion, a wire-passing hole, and a conductor attachment portion of the block shown in Fig. 4(a).

[0022] As shown in FIG. 3( a ), the watt-hour meter includes a circuit section 1 , a sensor section 2 , a conductor 3A, a block 4A, a case 5 , a cover 7 , a cover mounting screw 8 , an insulator 101 , a fixing plate 102 , and a spring 103 .

[0023] The conductor 3A has a wire abutting portion 3A1 as shown in Fig. 1(b). The block 4A has a conductor mounting portion 4Ae for mounting the conductor 3A, a second conductor mounting portion 4A2, a wire-passing hole 4Ad, and an insulation insertion portion 4A1 for inserting the insulator 101 as shown in Fig. 4(b).

[0024] As shown in Figures 3(b) and 3(c), the insulator 101 has a conductor passing hole 101a for passing the conductor 3A through, a fixing plate mounting portion 101b for mounting a fixing plate 102 on both the left and right side surfaces, a spring insertion portion 101c for inserting a spring 103, and a pressing surface 101d for pressing in by hand.

[0025] As shown in Fig. 1(b), the fixed plate 102 is inserted into the fixed plate attachment portion 101b of the insulator 101. The spring 103 is inserted into the spring insertion portion 101c of the insulator 101 as shown in Fig. 1(b).

[0026] Next, the operation of the watt-hour meter of the first embodiment configured as above will be described. First, as shown in Fig. 1(b), the fixed plate 102 is inserted into the fixed plate attachment portion 101b of the insulator 101 to fix the fixed plate 102. The insulator 101 with the spring 103 inserted into the spring insertion portion 101c of the insulator 101 is inserted into the insulator insertion portion 4A1 of the block 4A from the side where the spring insertion portion 101c is located.

[0027] Next, the conductor 3A is inserted into the conductor mounting portion 4Ae of the block 4A, the conductor through-hole 101a of the insulator 101, and the second conductor mounting portion 4A2 of the block 4A to assemble them. In the assembled state, the wire abutting portion 3A1 of the conductor 3A is in contact with the fixed plate 102, and the insulator 101 is slidable in the insertion direction of the insulation insertion portion 4A1 of the block 4A.

[0028] Next, as shown in FIG. 1(d), the pressing surface 101d of the insulator 101 is pressed in the insertion direction to press the fixing plate 102, causing the spring 103 to bend.

[0029] Next, as shown in FIG. 2(b), the electric wire 9 is inserted into the space generated between the electric wire abutting portion 3A1 of the conductor 3A and the fixed plate 102 through the electric wire insertion hole 4Ad of the block 4A.

[0030] Next, pressing the pressing surface 101d of the insulator 101 is stopped, and as shown in FIG. 2(d), the fixing plate 102 pressed by the spring 103 presses the electric wire 9 against the electric wire abutment portion 3A1 of the conductor 3A, thereby fixing the electric wire 9.

[0031] As described above, according to the watt-hour meter of the first embodiment, the wire 9 is pressed against the conductor 3A by the fixing plate 102 using the spring 103, so it is possible to make the pressing force greater than the specified value. There is no significant variation, and the work time can be significantly reduced compared to the tightening work time required for the current product, which requires two screws. This makes it possible to reduce costs while improving the workability of the watt-hour meter installation work.

[0032] Second Embodiment Fig. 5(a) to Fig. 5(d) are perspective views and partial cross-sectional views of a watthour meter according to a second embodiment of the present invention. Fig. 5(a) shows a state in which an electric wire is inserted into a space between an electric wire contact portion and a protrusion of a fixing plate through an electric wire passage hole of a block with an insulator pushed in, and Fig. 5(b) shows a partial cross-sectional view of the vicinity of the insulator of the watthour meter shown in Fig. 5(a). Fig. 5(c) shows a state in which pushing of the insulator is stopped and the fixing plate and the protrusion pushed by a spring press the electric wire against the electric wire contact portion, and Fig. 5(d) shows a partial cross-sectional view of the vicinity of the insulator of the watthour meter shown in Fig. 5(c).

[0033] The watt-hour meter includes a circuit section 1, a sensor section 2, a conductor 3A, a block 4A, a case 5, a cover 7, a cover mounting screw 8, an insulator 201, a fixing plate 202, and a spring 103.

[0034] As shown in Fig. 6(b), the fixed plate 202 has two protrusions 202a. The insulator 201 has a fixed plate attachment portion 201b having two recesses formed therein to avoid the two protrusions 202a of the fixed plate 202 as shown in Fig. 6(a).

[0035] Next, the operation of the watt-hour meter of the second embodiment configured as above will be described. First, the fixing plate 202 is inserted and fixed into the fixing plate attachment portion 201b of the insulator 201. The insulator 201 with the spring 103 inserted into the spring insertion portion 201c of the insulator 201 is inserted into the insulation insertion portion 4A1 of the block from the side where the spring insertion portion 201c is located.

[0036] Next, the conductor 3A is inserted into the conductor attachment portion 4Ae of the block 4A, the conductor through-hole 201a of the insulator 201, and the second conductor attachment portion 4A2 of the block 4A for assembly.

[0037] In the assembled state, the wire contact portion 3A1 of the conductor 3A and the protrusion 202a of the fixing plate 202 are in contact with each other, and the insulator 201 is slidable in the insertion direction of the insulator insertion portion 4A1 of the block 4A.

[0038] Next, as shown in FIG. 5(b), the pushing surface 201d of the insulator 201 is pushed in the insertion direction to press the fixed plate 202, causing the spring 103 to bend, and the electric wire 9 is inserted through the electric wire passing hole 4Ad of the block 4A into the space generated between the electric wire abutment portion 3A1 of the conductor 3A and the convex portion 202a of the fixed plate 202.

[0039] Next, pressing the pressing surface 201d of the insulator 201 is stopped, and as shown in FIG. 5(d), the fixing plate 202 pressed by the spring 103 and the convex portion 202a press the electric wire 9 against the electric wire abutment portion 3A1 of the conductor 3A, thereby fixing the electric wire 9.

[0040] Thus, according to the electricity meter of the second embodiment, the electric wire 9 is pressed against the conductor by the fixing plate 202 using the spring 103, but the force is concentrated on the protrusion 202a provided on the fixing plate 202 and bites into the inside of the electric wire, thereby preventing the electric wire 9 from slipping off.

[0041] The fixed plate 202 may have one or more protruding portions 202a.

[0042] (Third embodiment) Fig. 7(a) to Fig. 7(d) and Fig. 8(a) to Fig. 8(d) are perspective views and partial cross-sectional views of a watt-hour meter according to a third embodiment of the present invention. Fig. 7(a) shows a state in which an insulator is fixed to a block by a fixing part, and Fig. 7(b) shows a partial cross-sectional view of the vicinity of the insulator of the watt-hour meter shown in Fig. 7(a). Fig. 7(c) shows a state in which an electric wire is inserted into the space between the electric wire abutment part and the fixing plate through an electric wire insertion hole of the block, and Fig. 7(d) shows a partial cross-sectional view of the vicinity of the insulator of the watt-hour meter shown in Fig. 7(c).

[0043] Fig. 8(a) shows the state where the fixing part is slid to release the fixation with the block with the electric wire inserted, Fig. 8(b) shows a partial cross-sectional view of the vicinity of the insulator of the watt-hour meter shown in Fig. 8(a), Fig. 8(c) shows the state where the fixing plate pressed by the spring presses the electric wire against the electric wire abutment part, and Fig. 8(d) shows a partial cross-sectional view of the vicinity of the insulator of the watt-hour meter shown in Fig. 8(c).

[0044] Fig. 9(a) to Fig. 9(d) are partial perspective views of the vicinity of the insulator with the block of the watt-hour meter according to the third embodiment of the present invention removed. Fig. 9(a) corresponds to Fig. 7(b) and shows a state in which the insulator is fixed to the block by the fixing part, Fig. 9(b) corresponds to Fig. 7(d) and shows a state in which the electric wire is inserted into the space between the electric wire abutment part and the fixing plate through the electric wire insertion hole of the block. Fig. 9(c) corresponds to Fig. 8(b) and shows a state in which the fixing part is slid to release the fixation with the block with the electric wire inserted, and Fig. 9(d) corresponds to Fig. 8(d) and shows a state in which the fixing plate pressed by the spring presses the electric wire against the electric wire abutment part.

[0045] Fig. 10(a) is a perspective view of a block of a watt-hour meter according to a third embodiment of the present invention. Fig. 10(b) is a partial cross-sectional view showing an insulation insertion portion, an electric wire passage hole, a conductor mounting portion, and a recess of the block shown in Fig. 10(a). Figs. 11(a) and (b) are perspective views of an insulator of a watt-hour meter according to the third embodiment of the present invention. Figs. 11(c) and (d) are perspective views of a fixing part of a watt-hour meter according to the third embodiment of the present invention.

[0046] As shown in Fig. 10(b), the block 4C is provided with a first recess 4C3 and a second recess 4C4. As shown in Fig. 11(a) and (b), the insulator 301 is provided with an insulation-side sliding part 301e consisting of a convex part. As shown in Fig. 11(c) and (d), the fixed part 304 is provided with a fixed-side sliding part 304a that fits with the insulation-side sliding part 301e of the insulator 301, a first convex part 304b that fits with the first recess 4C3 of the block 4C, and a second convex part 304c and a sliding surface 304d that fits with the second recess 4C4 of the block 4C.

[0047] Next, the operation of the watt-hour meter of the third embodiment thus configured will be described. First, the fixed-side sliding part 304a of the fixed part 304 shown in Fig. 11(c)(d) is fitted to the insulating-side sliding part 301e of the insulator 301 shown in Fig. 11(a)(b), so that the fixed part 304 can slide relative to the insulator 301 as shown in Fig. 9(b).

[0048] 7(b), the fixed plate 102 is inserted into the fixed plate attachment portion 301b of the insulator 301 to fix the fixed plate 102. The insulator 301 with the spring 103 inserted into the spring insertion portion 301c of the insulator 301 is inserted into the insulation insertion portion 4C1 of the block 4C from the side where the spring insertion portion 301c is located.

[0049] Next, the conductor 3A is inserted into the conductor mounting portion 4Ce of the block 4C, the conductor through-hole 301a of the insulator 301, and the second conductor mounting portion 4C2 of the block 4C to assemble them. In the assembled state, the wire abutting portion 3A1 of the conductor 3A is in contact with the fixed plate 102, and the insulator 301 is slidable in the insertion direction of the insulator insertion portion 4C1 of the block 4C.

[0050] Next, by pressing the sliding surface 304d of the fixed part 304 in the insertion direction of the insulating insert portion 4C1, the insulator 301 and the fixed plate 102 are pressed, and the spring 103 is deflected.

[0051] Next, the fixing part 304 is slid to fit the first convex portion 304b of the fixing part 304 into the first concave portion 4C3 of the block 4C, and at the same time, fit the second convex portion 304c of the fixing part 304 into the second concave portion 4C4 of the block 4C. In this state, a space is maintained between the wire abutting portion 3A1 of the conductor 3A and the fixing plate 102.

[0052] Next, as shown in FIG. 7(d), the electric wire 9 is inserted into the space generated between the electric wire abutting portion 3A1 of the conductor 3A and the fixed plate 102 through the electric wire insertion hole 4Cd of the block 4C.

[0053] 8(b), the sliding surface 304d of the fixed part 304 is slid to remove the first convex part 304b of the fixed part 304 from the first concave part 4C3 of the block 4C. At the same time, the second convex part 304c of the fixed part 304 is removed from the second concave part 4C4 of the block 4C.

[0054] Next, as shown in FIG. 8(d), the fixing plate 102 pressed by the spring 103 presses the electric wire 9 against the electric wire abutment portion 3A1 of the conductor 3A, thereby fixing the electric wire 9.

[0055] In addition, with the electric wire 9 fixed, the lower surfaces of the first convex portion 304b and the second convex portion 304c of the fixing part 304 abut against the block 4C, and when the sliding surface 304d of the fixing part 304 is pushed in the insertion direction of the insulating insertion portion 4C1, the first convex portion 304b and the second convex portion 304c slide without getting caught on the block, making it possible to easily remove the electric wire.

[0056] Thus, according to the electricity meter of the third embodiment, there is no need to keep pressing the insulator 301, and the fixing part 304 maintains a space between the conductor 3A and the fixing plate 102, allowing the electric wire 9 to be inserted, thereby improving the workability of installing the electricity meter. [Explanation of symbols]

[0057] 1 Circuit section 1a Display section 1b Conductor connection 1c Sensor connection 1d Block mounting part 2 Sensor section 2a Sensor side circuit connection 3,3A conductor 3a, 3Aa Conductor side circuit connection part 3b Wire storage area 3A1 Wire contact part Blocks 4, 4A, 4C 4a, 4Aa, 4Ca Case mounting part 4b, 4Ab, 4Cb Circuit mounting section 4c, 4Ac, 4Cc Female thread for cover installation 4d, 4Ad, 4Cd Wire holes 4e, 4Ae, 4Ce Conductor attachment part 4f, 4Af, 4Cf Block side fixing screw mounting part 4A1, 4C1 Insulation insert 4A2, 4C2 Second conductor attachment part 4C3 First recess 4C4 Second recess 5 Cases 5a Display window 5b Case side base mounting part 5c Case waterproof rib storage area 5d Case side fixing screw attachment part 6 Wire mounting screw 7 Cover 7a Waterproof rib 8 Cover mounting screw 9 Electric wire 101,201,301 Insulators 101a, 201a, 301a Conductor holes 101b,201b,301b Fixed plate mounting part 101c, 201c, 301c Spring insertion part 101d, 201d Indentation surface 301e Insulation side sliding part 102,202 Fixed plate 202a Convex part 103 Spring 304 Fixing parts 304a Fixed side sliding part 304b First protrusion 304c Second convex part 304d sliding surface

Claims

1. a block having a plate-shaped conductor having a wire abutting portion which is a flat surface against which an electric wire abuts; a conductor mounting portion which is a square hole into which the conductor is inserted and fixed; a second conductor mounting portion which is a recess for fixing the tip of the electric wire abutting portion of the conductor; a wire-passing hole which is a square hole provided in contact with the flat surface which is the electric wire abutting portion of the conductor in the vicinity of the second conductor mounting portion; and an insulation insertion portion which is a recess provided between the conductor mounting portion and the second conductor mounting portion and has an open surface on the opposite side to the flat surface which is the electric wire abutting portion; The insulator has a spring insertion portion, which is a hole that is provided in the front-rear direction perpendicular to the conductor through-hole, a push-in surface that is a surface provided on the opposite side of the spring insertion portion, and a fixed plate attachment portion that is a square hole that is provided at the end of the conductor through-hole on the spring insertion portion side and that penetrates both left and right side surfaces perpendicular to the conductor through-hole and the spring insertion portion, a spring that is inserted into the spring insertion portion of the insulator, and a fixed plate that is inserted into the fixed plate attachment portion of the insulator and pressed by the spring, and the fixed plate is inserted into the fixed plate attachment portion of the insulator and fixed, and the front of the insulator is provided with a spring that is inserted into the fixed plate attachment portion of the insulator and a fixed plate that is inserted into the fixed plate attachment portion of the insulator and pressed by the spring. The insulator with the spring inserted in the spring insertion portion is inserted from the surface of the insulator where the spring insertion portion is located to the open surface of the insulation insertion portion of the block, and the conductor is inserted in this order into the conductor attachment portion of the block, the conductor through hole of the insulator, and the second conductor attachment portion of the block. In an initial state, the spring presses the fixing plate, and the wire abutment portion of the conductor and the fixing plate are in an abutting state. The insulator is slidable in the insertion direction of the insulation insertion portion. When the electric wire is attached by passing the electric wire through the electric wire through hole of the block, and when the pushing surface of the insulator is pushed in the insertion direction, the fixed plate fixed to the insulator is also pushed and moved, and the spring is pushed by the fixed plate to bend, creating a space between the wire abutment portion of the conductor and the fixed plate. After the wire is inserted through the wire passing hole of the block into the space created between the wire abutment portion of the conductor and the fixed plate, pushing the pushing surface of the insulator in the insertion direction is stopped, and the fixed plate pushed by the spring presses the wire against the wire abutment portion of the conductor, thereby fixing the wire.

2. 2. The electricity meter according to claim 1, wherein a convex portion is provided on the surface of the fixing plate that abuts against the electric wire, and the fixing plate attachment portion comprises a hole that is provided in a shape penetrating both left and right side surfaces and shaped to avoid the convex portion when the fixing plate is inserted, and when the electric wire is passed through the electric wire-passing hole of the block to attach the electric wire, the pushing surface of the insulator is pushed in the insertion direction, whereby the fixing plate fixed to the insulator is pushed and moved and the spring is also bent, generating a space between the electric wire abutment portion of the conductor and the fixing plate, and after the electric wire is inserted through the electric wire-passing hole of the block into the space generated between the electric wire abutment portion of the conductor and the convex portion of the fixing plate, by stopping the pushing of the pushing surface of the insulator in the insertion direction, the fixing plate and the convex portion pressed by the spring press the electric wire against the electric wire abutment portion, thereby fixing the electric wire.

3. a first recess on the second conductor mounting portion side of the open side of the insulation insertion portion of the block, and a second recess on the conductor mounting portion side of the open side of the insulation insertion portion of the block; an insulation-side sliding portion that becomes a convex portion is provided on both left and right side surfaces of the push-in surface side of the insulator; and a fixed part having a fixed-side sliding portion that becomes a hole portion on both left and right side surfaces and a sliding surface consisting of a first convex portion and a second convex portion in the up-down direction and a plurality of steps on the front side is provided; by fitting the fixed-side sliding portion into the insulation-side sliding portion, the fixed part becomes slidable on the insulator; when the electric wire is passed through the electric wire passing hole of the block to attach the electric wire, by pushing the push-in surface of the insulator in the insertion direction, the fixed plate fixed to the insulator is also pushed and moved, and the spring is also pushed by the fixed plate to bend, and a space is generated between the electric wire abutment portion of the conductor and the fixed plate, and then the sliding surface of the fixed part is lifted with a finger.

3. The watt-hour meter according to claim 1, wherein the fixing part is operated in a downward direction to slide, and the first convex portion of the fixing part is fitted into the first concave portion of the block, and at the same time, the second convex portion of the fixing part is fitted into the second concave portion of the block, thereby maintaining a state in which a space is generated between the electric wire abutment portion of the conductor and the fixing plate, and the electric wire is inserted into the space generated between the electric wire abutment portion of the conductor and the fixing plate through the electric wire passing hole of the block, and then the sliding surface of the fixing part is operated in an upward and downward direction with a finger to slide the fixing part, and the first convex portion of the fixing part is removed from the first concave portion of the block, and at the same time, the second convex portion of the fixing part is removed from the second concave portion of the block, and the fixing plate, pressed by the spring, presses the electric wire against the electric wire abutment portion of the conductor, thereby fixing the electric wire.

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