JPH11337582A - Voltage electromagnet of induction type measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voltage electromagnet little in disconnection of wire and deformation and satisfying insulation performance against lightning impulse by arranging a pair of insulation covers oppositedly to each other so as to cover the outer circumferential part of a voltage coil. SOLUTION: This voltage electromagnet is constituted so that a pair of insulation covers 24 are arranged oppositedly to each other so as to surround a voltage coil 22 from both sides of the outer circumferential part of a voltage coil bobbin 21 wound with the voltage coil 22 and the covers insulate between the voltage coil 22 and voltage iron cores 25, 26, the voltage coil 22 is perfectly covered with insulating material only by mounting the insulation covers 24 on the voltage coil bobbin 21, disconnection of wire or deformation generated in a customary device is eliminated, and insulation performance against lighting impulse can be satisfied. Although the winding thickness of the voltage coil 22 is changed due to various rated specification as a watthour meter, the voltage coil 22 can be easily insulated by a pair of insulation covers worked by general molding, and quality control of insulation performance or the like becomes easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulation structure of a voltage coil in a voltage electromagnet of an induction meter such as a watt hour meter.

[0002]

2. Description of the Related Art FIG.
It is a perspective view which shows the voltage electromagnet of the conventional watt-hour meter shown in No. 0 publication. As is well known, an inductive watt-hour meter applies a voltage of an electric circuit for measuring an electric energy to a voltage electromagnet of an electromagnet device, and supplies a current of an electric circuit for measuring an electric energy to a current coil of a current electromagnet. The rotating disk is rotated by the moving magnetic field generated by. With this rotation, the character wheel of the measuring instrument is rotated to measure and display the used electric energy.

The configuration of the above voltage electromagnet will be described. In FIG. 14, reference numeral 10 denotes a voltage electromagnet, 1 denotes a voltage coil unit, and a thin enamel wire is wound several thousand times around a voltage coil bobbin (not shown) to form a voltage coil. The voltage coil bobbin and the outer periphery of the voltage coil are filled with a plastic (thermoplastic resin) and the insulation coating 2 is applied. Reference numeral 3 denotes a voltage core obtained by punching and stacking a silicon steel plate, and reference numerals 4a and 4b denote a pair of lead wires, one of which is connected to the beginning of the voltage coil and the other to the end of the winding. These lead wires 4a and 4b are connected to a connection terminal box (not shown) of the inductive watt-hour meter.

[0004]

The voltage coil portion of the voltage electromagnet of the conventional watt-hour meter has a plastic insulating coating 2 formed on the outer periphery of the voltage coil by injection molding. Depending on the conditions of the injection speed and injection pressure of the thermoplastic resin, the voltage coil may be disconnected, or the outer layer of the voltage coil may sink into the inner layer and be deformed. In addition, JIS-C-1211 of Japanese Industrial Standard of watt hour meter
And the insulation performance against lightning impulse withstand voltage described in IEC-521 of the International Electrotechnical Commission standard may not be satisfied.

[0005] In addition, depending on the specification such as the rated voltage and the frequency of the watt-hour meter, there are many types of windings of the voltage coil.
The thickness of the plastic also depends on the type of winding. Therefore, molded articles having different thicknesses of plastic of the insulation coating 2 are molded by the same mold, so that it is difficult to select molding conditions, and it is difficult to control quality such as insulation performance against lightning impulse. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. The present invention has the advantage that the disconnection and deformation of the voltage coil are small, the insulation performance against the lightning impulse withstand voltage is satisfied, and the quality control of the voltage coil section is performed. It is an object of the present invention to obtain a voltage electromagnet in an inductive meter such as a watt-hour meter that can be easily operated.

[0007]

In the voltage electromagnet of the inductive meter according to the present invention, the voltage coil bobbin is provided at a center of the E-shaped voltage core and at one end of the core. And a double flange formed on the other end side of the winding core and formed with a predetermined gap therebetween. The insulating cover is provided with a voltage coil wound around a voltage coil bobbin. A cover portion formed in a U-shape so as to surround substantially half of the outer peripheral portion of the cover portion, a superposed portion formed at a U-shaped tip of the cover portion, and a voltage formed on one end side of the cover portion. A flange-side insulating wall for covering the flange provided on the coil bobbin, and a double-flange-side insulating wall formed on the other end of the cover and inserted into a gap between the double flanges provided on the voltage coil bobbin. The insulation cover is engaged with the insulation cover, and the double-flanged insulation wall is inserted into the gap between the double-flanges. While, in which the outer peripheral portion of the voltage coil and configured to cover above the insulating cover by superimposing the respective overlapping portions.

The voltage coil bobbin has a double flange portion provided with lead-out grooves for the starting and exiting ends of the voltage coil and a lead-out lead-out groove and providing a lead-out lead-out groove. The lead wire is connected to the lead wire at the beginning of the winding and the lead wire at the end of the winding inside the gap.

A pair of insulating covers are fitted to the outer surface of the voltage coil so as to face from the outer core of the E-shaped voltage core toward the central core, and a part of the outer surface of the insulating cover is fitted to the outer core. They are configured to be close to each other.

[0010] Further, a fitting portion which fits into the inside of the gap between the double flange portions of the voltage coil bobbin and the double flange side insulating wall of the insulating cover is provided.

Further, when the first and second overlapping portions of the insulating cover are provided with concave and convex portions which fit together, and when the outer peripheral portion of the voltage coil is covered with a pair of insulating covers, one of the insulating covers is used. And the second overlapping portion of the other insulating cover facing each other is fitted to each other by the uneven portion.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a plan view of a voltage electromagnet of a watt hour meter showing Embodiment 1 of the present invention,
FIG. 2 is a sectional view taken along line CC of FIG. 3A and 3B show a voltage coil bobbin according to Embodiment 1 of the present invention, wherein FIG. 3A is a front view, FIG. 3B is a right side view, FIG. 3C is a plan view, and FIG. 4 is a perspective view of the voltage coil bobbin shown in FIG. 3 as viewed from slightly above, and FIG. 5 is a perspective view of the voltage coil bobbin shown in FIG. 3 as viewed from slightly below. 6A and 6B show an insulating cover according to Embodiment 1 of the present invention, in which FIG. 6A is a front view, FIG. 6B is a right side view, FIG. 6C is a left side view, FIG. () Is a bottom view. FIG. 7 is a sectional view taken along line DD of FIG. FIG. 8 shows the line E in FIG.
It is sectional drawing which follows -E. 9 is a perspective view of the insulating cover shown in FIG. 6 as viewed from slightly above, and FIG. 10 is a perspective view of the insulating cover shown in FIG. 6 as viewed from slightly below. FIG. 11 is a sectional view of the center of the voltage electromagnet shown in FIG. 1 cut in a plane direction.

1 to 11, reference numeral 101 denotes a voltage electromagnet, and reference numeral 20 denotes a voltage coil unit. Reference numeral 21 denotes a voltage coil bobbin formed of a synthetic resin material. Reference numeral 22 denotes a voltage coil wound around the voltage coil bobbin 21 to generate a voltage magnetic flux proportional to the voltage. A thin enamel wire is wound several thousand times. 23a and 23b are lead wires for supplying a voltage to the voltage coil 22;
The beginning of the winding of the voltage coil 22 is soldered to the tip of a, and the end of the winding of the voltage coil 22 is soldered to the tip of the lead wire 23b. This lead wire 23
a and 23b have a double flange 213 as described later.
Is held inside the gap. Reference numeral 24 denotes an insulating cover formed of a synthetic resin material, which is attached to an outer peripheral portion of the voltage coil bobbin 21 to insulate the voltage coil 22 from external components. Reference numeral 25 denotes an E-shaped voltage iron core serving as a magnetic path of the voltage magnetic flux, and reference numeral 26 denotes an I-shaped voltage iron core serving as a magnetic path of the voltage magnetic flux.

Next, the detailed structure of the voltage coil bobbin 21 will be described mainly with reference to FIGS. 21
Reference numeral 1 denotes a cylindrical core portion around which the voltage coil 22 is wound; 212, a flange portion formed on one end side (lower side) of the core portion 211;
Reference numeral 3 denotes a double flange formed on the other end side (upper side) of the core 211, and has an inner flange 213a and an outer flange 213b. The gap 2 where the above-mentioned lead wires 23a and 23b are held is provided between the inner flange portion 213a and the outer flange portion 213b.
20 are formed. In this gap 220, a lead wire 23a for starting winding of the voltage coil 22 is held on the gap 220a side. A lead wire 23b for ending the winding of the voltage coil 22 is held on the side of the gap 220b. Therefore, the gap size of the gap 220 is formed to a size corresponding to the thickness of the lead wires 23a and 23b. Reference numeral 221 denotes a lead-out lead-out groove provided at the inner flange portion 213a for starting the winding of the voltage coil 22.
It has reached the circumference of 11. 222 is the inner collar 213a
Are provided at the end of the winding end of the voltage coil 22 provided at the end of the winding, and are cut out to positions not reaching the outer peripheral surface of the voltage coil 22 having the maximum winding thickness.

Reference numerals 223a and 223b denote lead lead-out grooves 224a and 224b provided by cutting out the outer flange portion 213b.
Reference numeral 224b denotes a coil pole insulating wall formed between the inner flange portion 213a and the outer flange portion 213b and between the gaps 220a and 220b. 225 is an outer flange portion 213b
The first pedestal surface slightly raised in the gap 220 from the
Lead lead fixing portions 226a and 226b formed by the first pedestal surface 225 so that the gap dimension is smaller than the outer diameter of the insulating coating of the lead leads 23a and 23b;
Reference numerals 227a and 227b denote supporting points for bending when the lead wires 23a and 23b are bent and fixed.
Reference numeral 228b denotes a second pedestal surface slightly raised from the outer flange portion 213b.
The insulating coatings 3a and 23b are formed so as to have a smaller diameter than the outer diameter. 229a and 229b are the second pedestal surfaces 2
It is a fitting projection formed to protrude from 28a, 228b.

Next, the detailed structure of the insulating cover 24 will be described mainly with reference to FIGS. 240 is U
A cover portion 241 is formed in a U-shape, and 241 is an inner peripheral surface of the cover portion facing the outer peripheral portion of the voltage coil 22 wound around the core 211 of the voltage coil bobbin 21, and 242 is a U-shaped one on the outer surface side of the cover portion 240 The first overlapping portion 243 formed at the front end of the auxiliary overlapping portion 243 is formed on the inner peripheral surface 241 of the cover portion with respect to the first overlapping portion 242 with a predetermined gap 244 therebetween. Reference numeral 245 denotes a second overlapping portion formed on the other end of the U-shape on the inner peripheral surface 241 of the cover. Reference numeral 246 a denotes a flange engaging groove formed on one end side (lower side) of the inner peripheral surface 241 of the cover, and has a groove width slightly larger than the thickness of the flange 212. Reference numeral 246b denotes a flange engaging groove formed on the other end side (upper side) of the cover inner peripheral surface 241;
The groove width is formed slightly larger than the thickness of the groove 3a.

247 is adjacent to the flange engaging groove 246b and U
The gap 220 formed in the double flange portion 213 of the voltage coil bobbin 21 is a double flange side insulating wall formed in a V-shaped rib shape.
It is formed to be inserted into. Reference numeral 248 denotes a concave plane, and is formed so that the second pedestal surface 228a or 228b of the voltage coil bobbin 21 and the upper surface of the double flange side insulating wall 247 are not buffered when the insulating cover 24 is mounted on the voltage coil bobbin 21. . 249 is a fitting recess,
When the insulating cover 24 is mounted on the voltage coil bobbin 21, the fitting protrusion 229a or 2
It is formed on the upper surface of the double flange-side insulating wall 247 facing 29b. Reference numeral 250 denotes a flange-shaped insulating wall formed in a U-shaped rib shape adjacent to the flange engaging groove 246a, and both ends of the U-shape have a first overlapping portion 242 and a second overlapping portion. 245 and are integrally formed. 25
Reference numeral 1 denotes a projection provided at the lower center part on the outer surface side of the cover part 240. The projection 1 makes the voltage coil part 20 contact the outer core part 25b of the E-shaped voltage core 25 or makes the interval extremely small. is there.

Next, the assembling process of the voltage electromagnet 101 and the operation of each part will be described with reference to FIGS. First, the winding start output wire of the voltage coil 22 is connected to the double flange portion 213 from the cylindrical winding core 211 of the voltage coil bobbin 21.
Is wound out to the gap 220a via the winding start outlet wire guide groove 221 and wound around the gap 220a to temporarily fix the terminal. Next, a voltage coil 22 is wound by a winding machine (not shown).
Is wound around the winding core 211 a predetermined number of times. After winding, the winding end terminal of the voltage coil 22 is led out to the gap 220b through the winding end lead-out lead-out groove 222, wound around the gap 220b and temporarily fixed, and the winding operation is completed. I do.

Next, the lead wires 23a and 23b are
Gap 220 between double flange portions 213 of voltage coil bobbin 21
a, 220b provided on second base surfaces 228a, 228
A predetermined length is inserted into the lead wire guide path formed by b. After that, the lead wires 23a and 23b are prevented from rotating so that one end thereof is led out of the voltage coil bobbin 21 through the lead lead wire leading grooves 223a and 223b, and are bent and formed using the second seat surfaces 228a and 228b. . And the lead wires 23a, 23b
Is wound several times around the winding end and winding start terminals of the voltage coil 22, which are led out from the winding start outlet lead-out groove 221 and the winding end outlet lead-out groove 222 and are temporarily fixed.

The soldered portion is a portion where the potential difference of the voltage applied to the voltage coil 22 is highest, and a portion where the conductive portion is structurally closest. For this reason, as shown in the plan view of FIG. 1, the insulation coating of the lead wires 23a and 23b near the soldering part is pressed against the fulcrums 227a and 227b and bent.
The lead wires 23 are provided on the first pedestal surfaces 226a and 226b.
a and 23b are press-fitted and fixed. Due to this fixation, even if vibration or impact is applied to the lead wires 23a, 23b, the voltage coil bobbin 21 is firmly held without rattling.
, And the insulation distance between the lead wires 23a and 23b is secured by the coil pole insulating wall 224a. Thus, the operations of joining the lead wires 23a and 23b and the voltage coil 22 and fixing the lead wires 23a and 23b to the voltage coil bobbin 21 are completed.

Next, a procedure for mounting the insulating cover 24 on the voltage coil bobbin 21 to insulate the voltage coil 22 from external parts will be described. In this case, the insulating cover 24
Are mounted face-to-face using a pair of those described above. That is, as shown in FIG. 1, the voltage coil is mounted so as to cover the outer surface of the voltage coil from the directions of arrows A and B. The mounting will be described in detail. First, the insulating cover 24 is inserted from the direction of the arrow A so that the flange engaging grooves 246a and 246b of the insulating cover 24 extend along the flange 212 and the inner flange 213a of the voltage coil bobbin 21. As the insertion of the insulating cover 24 proceeds, the double flange-side insulating wall 247 of the insulating cover 24 enters the gap 220a of the voltage coil bobbin 21, and the fitting protrusion 229a formed on the second pedestal surface 228a of the voltage coil bobbin 21 moves. It contacts the double flange side insulating wall 247. As the insertion proceeds further, the fitting protrusion 229a rides on the concave flat surface 248 formed on the upper surface of the double flange side insulating wall 247, so that the outer flange portion 213b of the voltage coil bobbin 21 is elastically deformed upward. When the insertion is further advanced, the insulation cover 2
The fitting protrusion 229a is fitted into the fitting concave portion 249 provided in the base member 4, the elastic deformation of the outer flange portion 213b is released, and the insulating cover 24 is mounted on the voltage coil bobbin 21 in a state where no stress is applied after being assembled. Is done. In this state, the flange-side insulating wall 250 of the insulating cover 24 is
12 covers a half circumference around the lower surface. With this operation, the semicircular outer peripheral surface of the voltage coil 22 is covered with the insulating cover 24.

Next, in order to insulate the other half circumferential surface of the voltage coil 22, another insulating cover 24 is arranged so as to face the already mounted insulating cover 24 so as to face each other. It is inserted and fixed in the voltage coil bobbin 21 in a similar manner. At this time, in order to arrange the insulating covers 24 so as to face each other, as shown in FIG. 11, the second overlapping portions 245 are inserted and joined into the gaps 244 facing each other. The insulation distance is secured. In this state, the second overlapping portion 245 extended to the flange-side insulating wall 250 below the flange portion 212 and the first overlapping portion 242 further extended to the flange-side insulating wall 250 thereunder. Is arranged so that the insulating cover 24 covers the entire lower surface of the flange 212, and the insulation distance between the lower surface of the flange 212 and other components such as the I-shaped voltage core 26 is also ensured. . With the above, the insulating cover 2 on the voltage coil bobbin 21
4 is completed.

In the above-described assembled state, the insulating cover 24 can be removed and reassembled by opening the insulating cover 24 from the voltage coil bobbin 21 in the joining direction. Therefore,
This structure can facilitate operations that require disassembly after assembly, such as management of the winding state and failure analysis.

However, this structure is not preferable in terms of insulation because the insulating cover 24 is detached when the voltage electromagnet 101 is assembled. Thus, E composed of a central iron core 25a and left and right outer iron cores 25b.
As shown in FIG. 11, the insertion direction of the voltage coil section 20 into the shaped voltage core 25 is a direction in which the joining position of the pair of insulating covers 24 intersects the line connecting the left and right outer core sections 25b. That is, in FIG. 1, the directions are indicated by arrows A and B. As a result, even if the insulating cover 24 is to be opened in the joining direction, it cannot be opened in the left-right direction because of the outer core portion 25b. Therefore, after being incorporated into the E-shaped voltage core 25, the insulating cover 24 does not come off, so that there is no problem in terms of insulation.

Further, by setting the mounting direction as described above, the insulation distance between the winding start and end terminals of the voltage coil 22 is provided on the second pedestal surfaces 228a and 228b of the voltage coil bobbin 21 and the fitting projections 229a and 229b. And the function as an insulating wall between the voltage coil 22 wound around the core 211 of the voltage coil bobbin 21 and the E-shaped voltage iron core 25 is added to the double flange side insulating wall 247 of the insulating cover 24. Further, since the position of the joint between the pair of insulating covers 24 is 90 ° away from the outer core 25b of the E-shaped voltage core 25 which is closest to the voltage coil 22 in position, Insulation cover 2 for outer core 25b
4 completely becomes an insulator as one solid. Accordingly, the insulation distance between the voltage coil 22 and the outer core portion 25b is increased, and the insulation is further improved. As described above, E
After inserting the voltage coil section 20 insulated by using the insulating cover 24 into the central core section 25a of the voltage core 25, the I-shaped core 26 is fixed to the tip of the central core section 25a, whereby the voltage electromagnet 101 is fixed. Is completed.

When a voltage is applied to the voltage coil 22, the voltage coil section 20 may vibrate depending on the frequency. Therefore, if the voltage coil 22 having the insulating cover 24 attached thereto is loosely attached to the E-shaped voltage core 25, sound is generated. The rattling also changes the joining depth of the joint of the insulating cover 24, that is, the insulation distance, and the rattling also affects the insulation performance. Therefore, by providing the protrusion 251 for preventing rattling on the insulating cover 24 and bringing the protrusion 251 into contact with the outer core portion 25b of the E-shaped voltage core 25, the rattling of the insulating cover 24 is removed and sound generation is prevented. In addition, a stable insulation performance is secured by suppressing a change in insulation distance.

Embodiment 2 FIG. In the above embodiment, the method of mounting the insulating cover 24 on the voltage coil bobbin 21 is such that the fitting protrusions 229a and 229b of the voltage coil bobbin 21 and the fitting recess 249 of the insulating cover 24 are fitted. As shown in FIG. 13, insulating cover fitting grooves 321a and 321b provided on the voltage coil bobbin 21 and fitting protrusions 324a and 324b provided on the insulating cover 24 may be used instead. Alternatively, as shown in FIG. The fitting may be performed by fitting a fitting recess 331 provided in the first overlapping portion 242 of the insulating cover 24 with a fitting protrusion 334 provided for fitting in a part of the second overlapping portion 245. Good.

[0028]

Since the present invention is configured as described above, it has the following effects.

The voltage electromagnet of the induction-type instrument according to the present invention comprises a pair of insulating covers facing each other so as to surround the voltage coil from both sides of the outer periphery of the voltage coil bobbin around which the voltage coil is wound. Since the coil and the voltage core are insulated, the voltage coil is completely covered with the insulator only by attaching the insulating cover to the voltage coil bobbin. Can be satisfied with the insulation performance. In addition, even if the winding thickness of the voltage coil changes due to various rating specifications such as a watt-hour meter, the voltage coil can be easily insulated by a pair of general molded insulation covers. Becomes easier.

Further, the insulating cover has a first overlapping portion formed on the outer peripheral surface of one of the U-shaped tips of the cover portion, and a predetermined gap from the first overlapping portion. A formed auxiliary overlapping portion, a second overlapping portion formed at the other end of the U-shape, and a flange side formed at one end side of the cover portion and covering a flange portion provided on the voltage coil bobbin. An insulating wall and a double flange side insulating wall formed on the other end side of the cover portion and provided in the voltage coil bobbin and inserted into the gap between the double flange portions. The double flange side insulating wall is inserted into the gap between the flanges, the fitting protrusion and the fitting recess are fitted, and the outer periphery of the voltage coil is covered with an insulating cover by overlapping the overlapping portions. And, inside the gap between the double flanges of the voltage coil bobbin, Since connects the lead-out lead wire end opening outgoing lines, voltage coils only attaching the insulating cover to the voltage coil bobbin is completely covered by the insulator,
Disconnection and deformation of the voltage coil unlike the conventional device are eliminated,
The insulation performance against lightning impulse can be satisfied. In addition, even if the winding thickness of the voltage coil changes due to the difference in the rated specifications of the watt hour meter, the voltage coil can be easily insulated by a pair of generally formed insulating covers, and quality control such as insulation performance can be easily performed. Become.

When the insulating cover, which is provided opposite to the outer peripheral portion of the voltage coil bobbin, is mounted on the voltage core, the joint position of the insulating cover intersects a line connecting the left and right outer core portions of the voltage core. The position of the joint between the pair of insulating covers is 90 ° away from the outer core of the E-shaped voltage core that is closest to the voltage coil in position. Since the insulation distance between the voltage coil and the outer core portion is increased, the insulation performance is further improved.

Further, a fitting recess is formed in the gap between the double flange portions of the voltage coil bobbin, and a fitting projection fitted to the fitting recess is provided on the double flange side insulating wall of the insulating cover. Since the recess and the fitting protrusion are fitted using the elasticity of the synthetic resin material, no special jigs or equipment are required for assembly,
Good assemblability and inexpensive.

Further, the fitting recess formed in the first overlapping portion of the insulating cover and the fitting projection fitted in the fitting recess formed in the second overlapping portion are formed by fitting and joining. It is easy to assemble, does not require special jigs and equipment for assembling, has good assemblability, and can be assembled at low cost.

[Brief description of the drawings]

FIG. 1 is a plan view of a voltage electromagnet according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line CC of FIG.

FIG. 3 is a detailed view showing a voltage coil bobbin of the present invention.

FIG. 4 is a perspective view of the voltage coil bobbin of the present invention as viewed from above.

FIG. 5 is a perspective view of the voltage coil bobbin of the present invention as viewed from below.

FIG. 6 is a detailed view showing the insulating cover of the present invention.

FIG. 7 is a sectional view taken along line DD of FIG. 6;

FIG. 8 is a sectional view taken along line EE in FIG. 6;

FIG. 9 is a perspective view of the insulating cover of the present invention as viewed from above.

FIG. 10 is a perspective view of the insulating cover of the present invention as viewed from below.

11 is a cross-sectional view of the center of the voltage electromagnet shown in FIG. 1 cut in a plane direction.

FIG. 12 is a sectional view of a voltage electromagnet according to a second embodiment of the present invention.

FIG. 13 is a sectional view of a voltage electromagnet according to a second embodiment of the present invention.

FIG. 14 is a perspective view showing a voltage electromagnet of a conventional watt-hour meter.

[Explanation of symbols]

Reference Signs List 20 voltage coil part, 21 voltage coil bobbin, 22
Voltage coil, 23a, 23b Lead wire, 24
Insulation cover, 25 E type voltage iron core, 26 I type voltage iron core, 211 core, 212 flange, 213 double flange,
213a inner flange, 213b outer flange, 220a,
220b gap, 221 winding start outlet lead-out groove, 222
End-of-winding exit lead-out groove, 223a, 223b Lead-out lead-out groove, 224a, 224b Insulation wall between coil poles, 225 First pedestal surface, 226a, 226b Exit lead wire fixing portion, 227a, 227b Bending fulcrum, 228a , 228b Second pedestal surface, 229a, 22
9b fitting protrusion, 240 cover part, 241 inner peripheral surface of cover part, 242 first overlapping part, 243 auxiliary overlapping part, 244 gap, 245 second overlapping part, 246a, 246b flange engaging groove, 247 Double flange side insulating wall, 248 concave plane, 249 fitting concave, 25
0 Insulated flange side wall, 251 protrusion.

Claims (5)

[Claims] 1. A voltage coil wound around a voltage coil bobbin, an insulating cover covering an outer periphery of the voltage coil, and a voltage coil covered by the insulating cover are formed so as to be fitted to a central iron core. In a voltage electromagnet of an induction meter having an E-shaped voltage core, the voltage coil bobbin is
A core portion fitted to the central core portion of the voltage core; a flange portion provided at one end of the core portion; and a flange at the other end side of the core portion with a predetermined gap therebetween. A double flange portion formed in a double shape, and the insulating cover is formed in a U-shape so as to surround substantially half of the outer peripheral portion of the voltage coil wound around the voltage coil bobbin. , U
An overlapping portion formed at each of the U-shaped ends, a flange-side insulating wall formed at one end of the cover portion and covering a flange portion provided at the voltage coil bobbin, and formed at the other end side of the cover portion. And a double flange side insulating wall provided on the voltage coil bobbin and inserted into the gap between the double flanges. A voltage electromagnet for an inductive meter, wherein an insulating wall is inserted and an outer peripheral portion of the voltage coil is covered with the insulating cover by overlapping the respective overlapping portions. 2. The voltage coil bobbin according to claim 1, further comprising: a lead-out groove for a winding start and a lead-out end of the voltage coil; 2. A voltage electromagnet for an inductive meter according to claim 1, wherein a winding start lead wire and a winding end lead wire and a lead lead wire are connected inside the gap. 3. A pair of insulating covers are fitted to the outer surface of the voltage coil so as to face from the outer core portion of the E-shaped voltage core toward the central core portion, and a part of the outer surface of the insulating cover is fitted to the outer core portion. The voltage electromagnet of an inductive meter according to claim 1 or 2, wherein the voltage electromagnet is configured to be close to each other. 4. A fitting portion that fits into the inside of the gap between the double flange portions of the voltage coil bobbin and the double flange side insulating wall of the insulating cover is provided.
A voltage electromagnet for an inductive meter according to any one of the preceding claims. 5. A method according to claim 1, wherein the first and second overlapping portions of the insulating cover are provided with concave and convex portions fitted to each other, and the outer peripheral portion of the voltage coil is covered with a pair of insulating covers. 2. The structure according to claim 1, wherein the first overlapping portion and the second overlapping portion of the facing insulating cover are fitted to each other by the uneven portion.
A voltage electromagnet for an inductive meter according to claim 3.