KR20140116780A - Current sensor and power sensor using the same - Google Patents

Abstract

The present invention provides a current sensor, which is simple and easy to attach and detach. Therefore, the current sensor (1) measures current flowing in coated wires (80a, 80b, 80c) from the outside. In particular, the current sensor includes a current sensor element mounted therein, a sensor body (10) to establish notched insertion grooves (22a, 22b, 22c) capable of inserting at least two of the wires respectively, and a base (70) for separation prevention which is a support means capable of supporting the wires (80a, 80b, 80c) inserted into the insertion grooves (22a, 22b, 22c) on the bottom surface of the insertion grooves (22a, 22b, 22c).

Description

TECHNICAL FIELD [0001] The present invention relates to a current sensor and a power sensor using the current sensor.

The present invention relates to a current sensor and a power sensor for measuring power using the current sensor.

Conventionally, for example, as a current sensor, there has been known a sensor having a pair of iron cores having a split type structure using a high permeability material, a coil wound around the iron cores, and a through hole In the current transformer having the resin case, the resin case has a waterproof function, and the primary current is not saturated even with a large current up to AC 1000A, and the measurement accuracy is high. (Refer to Reference 1).

Japanese Patent Laid-Open No. 2000-88889

However, since the above-described current detecting device has a shape surrounding the electric wire, when the electric current detecting device is provided, it is necessary to detach the electric wire once from the electric device and insert the electric wire into the current detecting device There is trouble. In addition, the above-described current detecting device requires an attachment structure for fixing itself, and further construction is required.

In view of the above problems, the current sensor according to the present invention aims at providing a current sensor that is simple and easy to attach and detach.

A current sensor according to the present invention is a current sensor for measuring an electric current flowing through a coated electric wire from the outside and includes a current sensor element and a notch shaped insertion groove in which at least two electric wires can be inserted And a supporting means capable of supporting the electric wire inserted into the insertion groove on the bottom surface of the insertion groove.

According to the present invention, it is possible to obtain a current sensor that is simple and easy to attach and detach the electric wire through the support means.

In the embodiment of the present invention, the width of the insertion groove may be narrowed from the notched opening toward the bottom.

According to the present embodiment, the electric wire can be accurately positioned at a predetermined position by inserting and pushing the electric wire into the insertion groove, and a current sensor with high measurement accuracy can be obtained.

In another embodiment of the present invention, the bottom surface of the insertion groove may be located at the same depth.

According to the present embodiment, positioning of electric wires can be uniformly performed, which is convenient.

In another embodiment of the present invention, the bottom surface of the insertion groove may be an arc shape.

According to the present embodiment, the electric wire can be positioned without rattling, and a current sensor with high measurement accuracy can be obtained.

In another embodiment of the present invention, the bottom surface of the insertion groove may have a substantially V shape.

According to the present embodiment, the electric wire can be positioned without rattling, and a current sensor with high measurement accuracy can be obtained.

As a new embodiment of the present invention, the retaining means may be a protrusion preventing protrusion integrally formed with the sensor main body so as to protrude from at least one of the opposite inner side surfaces of the insertion groove.

According to the present embodiment, since the supporting means is integrally formed with the sensor body, a current sensor having fewer parts and fewer assembling steps can be obtained.

As an embodiment of the present invention, the supporting means may be a separate member separate from the sensor main body.

According to this embodiment, it is possible to diversify the support means of the electric wire in response to the demand of the site, and a current sensor with high versatility can be obtained.

According to another embodiment of the present invention, the supporting means may be constituted by a coupling protrusion which is laterally pivoted from the edge of the insertion groove and a coupling band which can be coupled to the coupling protrusion.

According to this embodiment, it is possible to support the current sensor through an easy-to-obtain coupling band, thereby obtaining a current sensor that is easy to use.

As another embodiment of the present invention, the supporting means may be an elastic supporting member assembled to the sensor main body and pushing out the insertion groove so as to be able to move in and out, and to support the inserted electric wire in a detachable manner.

According to the present embodiment, since the electric wire can be detachably supported by a one-touch operation, a current sensor more convenient to use can be obtained.

As another embodiment of the present invention, the elastic support member may be formed of a plurality of generally J-shaped elastic arm portions arranged side by side.

According to the present embodiment, since the elastic supporting portion has an approximately J-shaped configuration, it is possible to smoothly perform the operation of detaching and attaching the electric wire, so that a more convenient current sensor can be obtained.

As a new embodiment of the present invention, the supporting means may be an escape preventing base which is provided with a pressing protrusion which can be inserted into each insertion groove of the sensor main body, and which can be fixed to the sensor main body.

According to the present embodiment, since the electric wire is pressed against the bottom surface of the insertion groove in the pressing protruding portion of the base for preventing dislocation, a current sensor with high measurement accuracy can be obtained.

In the embodiment of the present invention, the above-mentioned catching-off base may be provided with a pair of elastic receiving portions capable of being brought into pressure contact with the electric wire on the upper face of the pressing projection.

According to the present embodiment, since the electric wire is pressed to the elastic receiving portion of the pressing projection portion at a predetermined pressure on the bottom surface of the insertion groove, the electric wire is pressed to the bottom face of the insertion groove with a predetermined pressure with the elastic receiving portion of the pressing projection, It is possible to obtain a current sensor capable of avoiding deterioration of measurement accuracy due to deviation of component precision and assembly precision.

In another embodiment of the present invention, the stopping-off base may be configured so as to be accommodated in the upper end portion of the pressing projection so as to be movable up and down, and further having a pressing member urged upward through the spring member.

According to the present embodiment, since the pressing member assembled to the pressing projection portion is pressed and positioned on the electric wire through the spring member, a current sensor capable of avoiding deterioration of the measurement accuracy due to variation in component accuracy and assembly accuracy Can be obtained.

According to another embodiment of the present invention, the upper surface of the pressing member may be formed in an arc shape in the slip-off preventing base.

According to the present embodiment, the electric wire can be positioned without rattling, and a current sensor with high measurement accuracy can be obtained.

According to another embodiment of the present invention, the upper surface of the pressing member may have a substantially V-shape in the base for preventing slipping off.

According to the present embodiment, the electric wire can be positioned without rattling, and a current sensor with high measurement accuracy can be obtained.

As a new embodiment of the present invention, a display portion may be arranged on the upper surface of the sensor main body.

According to the present embodiment, since the measurement results can be visually observed, an efficient measurement operation can be performed in the field.

In order to solve the above problems, a power sensor according to the present invention is characterized in that a voltage sensor capable of measuring the voltage of the electric wire is disposed in the sensor body of the current sensor described in the foregoing description (above), and the current value measured by the current sensor And a control circuit for calculating a power value by the voltage value measured by the voltage sensor.

According to the present invention, not only the current but also the voltage and current can be measured, and it is possible to obtain a power sensor that is simple and easy to attach and detach the electric wire through the support means.

In another embodiment of the present invention, a communication port is provided in the sensor main body of the current sensor described above, and the voltage value of the electric wire received through the communication port is compared with the voltage value of the electric wire measured by the current sensor A control circuit for calculating the power value by the current value of the electric wire may be provided.

According to this embodiment, a power sensor capable of measuring a wide range of power consumption can be obtained.

According to another embodiment of the present invention, a storage element for storing the voltage value of the electric wire is provided in the sensor main body of the current sensor described above, and a current value of the electric wire measured by the current sensor and a current value A control circuit for calculating the power value with the voltage value may be provided.

According to this embodiment, it is possible to obtain a power sensor capable of measuring a wider power consumption.

1 is a perspective view showing a first embodiment of a current sensor according to the present invention;
2 is an exploded perspective view of the current sensor shown in Fig.
FIG. 3 is an exploded perspective view of the current sensor shown in FIG. 1, viewed from another angle; FIG.
4A and 4B are perspective views showing before and after assembling the current sensor shown in Fig.
Fig. 5A is a schematic front view showing a state in which electric wires are assembled, and Fig. B is a partially enlarged view of Fig.
6 is a longitudinal sectional view of the current sensor shown in Fig. 1 viewed from the rear side.
7 is an explanatory diagram for explaining a method of using the current sensor according to the present invention.
8 is a perspective view showing a second embodiment of the current sensor according to the present invention.
9 is an exploded perspective view of the current sensor shown in Fig.
FIG. 10 is an exploded perspective view of the current sensor shown in FIG. 8 viewed from another angle; FIG.
Fig. 11A and Fig. 11B are perspective views showing before and after assembling the current sensor shown in Fig.
12 is a perspective view showing a third embodiment of the current sensor according to the present invention.
Fig. 13 is an exploded perspective view of the current sensor shown in Fig. 12; Fig.
Fig. 14 is an exploded perspective view of the current sensor shown in Fig. 12 viewed from another angle. Fig.
Figs. 15A and 15B are perspective views showing before and after assembling the current sensor shown in Fig. 12; Fig.
16A and 16B are partially enlarged cross-sectional views showing the current sensor after assembly shown in Fig. 15B. Fig.
17A and 17B are schematic front views showing a perspective view and a use state showing a fourth embodiment of the current sensor according to the present invention.
Fig. 18 is an exploded perspective view of the current sensor shown in Fig. 17A. Fig.
19 is an exploded perspective view of the current sensor shown in Fig.
20A and 20B are perspective views showing before and after assembling the current sensor shown in Fig. 17A. Fig.
21A and 21B are perspective views showing a fifth embodiment of the current sensor according to the present invention and a use state thereof.
22 is an exploded perspective view of the current sensor shown in Fig. 21A. Fig.
23 is an exploded perspective view of the current sensor shown in Fig.

An embodiment of the current sensor according to the present invention will be described with reference to the accompanying drawings of Figs. 1 to 23. Fig.

1 to 7, the first embodiment is applied to the current sensor 1 for measuring the current value of three electric wires. The sensor body 10 and the base 70, .

2, the sensor main body 10 includes a housing 20, a top cover 30 attached to and integrated with the top surface of the housing 20, A lock member 50 slidably assembled to the rear surface of the front cover 40 and a door frame 50 and 51 for measurement disposed in the housing 20, .

As shown in Fig. 2, the housing 20 has a box-like shape having an opening on the front side, and has a connecting opening 21 on its upper surface, and by notching from its lower end surface to its back surface, The U-shaped insertion grooves 22a, 22b, and 22c are formed at a predetermined pitch. The U-shaped partition walls 23a, 23b, and 23c are integrally formed along the insertion grooves 22a, 22b, and 22c. Particularly, the U-shaped partition wall 23b separating the central insertion groove 22b is separated from the housing 20 so that the elastic claw portion 24 is provided at the lower end edge portion of the inner peripheral surface of the U- . Further, support ribs 25a and 25b for supporting two control-use first and second control substrates (not shown) in the front and rear direction are provided above the substantially U-shaped partition wall 23b located at the center, . In addition, the housing 20 has an engagement hole 26 formed at a predetermined pitch along the opening edge thereof.

The upper surface cover 30 has a planar shape capable of covering the upper surface of the housing 20 and has a liquid crystal monitor 31 buried in the central portion thereof. The liquid crystal monitor 31 is connected to first and second control substrates (not shown) for control incorporated in the housing 20, and based on a switching operation of a seesaw type switch 46 described later, , The voltage value, and the power value can be appropriately displayed.

2, the front cover 40 has a front surface shape capable of covering the front surface of the housing 20 and has a shape corresponding to the insertion grooves 22a, 22b, and 22c of the housing 20 Shaped notch grooves 41a, 41b, and 41c are formed in a substantially U-shape. 3, the position regulating arm portions 42, 42 are provided on opposite side edge portions of the notch grooves 41b located at the center among the three notch grooves 41a, 41b, 41c, Respectively. Guide rails 43 having guide grooves 43a are extended vertically in the inner edge portions of the notch grooves 41a and 41c located on both sides. The front cover 40 has an operation display hole 44 at the center of the upper portion of the front cover 40 and has connection holes 45a and 45b at both sides of the operation display window 44, A seesaw switch 46 and a pair of operation display holes 47 and 47 arranged above and below are provided between the operation display hole 41 and the connection hole 45a. The front cover 40 has an engaging claw portion 48 projecting along the outer periphery of the inward surface thereof.

As shown in Fig. 2 and Fig. 3, the door panels 20 and 51 for measuring are mounted on substantially U-shaped partition walls 23a and 23c provided in the housing 20, . The GMR elements are mounted on the gate-type printed boards 50 and 51 for measuring the electric currents of the electric wires. In addition, magnetic sensors such as Hall elements, Can be used. In addition, a voltage sensor element capable of measuring a voltage may be mounted as needed.

In this embodiment, two sheet-like display-use printed boards 50 and 51 are shown in Figs. 2 and 3. Fig. It should be noted that for the sake of convenience of explanation, it is also possible to connect between the pair of the above-mentioned door panels 50, 51 for measurement and the front cover 40 via the supporting ribs 25a, 25b of the housing 20 Two control first and second control boards are disposed. In particular, an IC chip is mounted on a first printed circuit board for control (not shown) located inside and constitutes a control circuit. A second printed circuit board for control (not shown) located on the front side is provided with a pair of connection sockets on both sides of the outwardly facing side thereof, and a pair of connection sockets A pair of switch elements, and a pair of light emitting elements arranged above and below.

The first printed circuit board for control, not shown, is capable of measuring the power value based on the current value, the voltage value and the power factor measured by the current sensor element and the voltage sensor element mounted on the measurement printed boards 50 and 51 The IC chip may be mounted.

Further, by providing a communication port on either one of the control first and second printed boards, the communication port may receive the voltage value of the external wire to measure the power value of the electric wire in the IC chip.

2, the lock member 60 displays "LOCK" and "FREE" on the upper portion of the front face thereof, while the operation ribs 61 are projected on the upper end thereof, while the lower side (Leg portions) 62 and 62 of a pair of approximately L-shaped locks are extended in parallel. 3, the lock member 60 includes a pair of guide grooves 63, 63 provided on both side edge portions thereof, and guide projections 40a, 40b provided on the back surface of the front cover 40, 40a, respectively, so as to be slidably assembled to the front cover 40. As shown in Fig.

2, the pull-out preventing base 70 has a planar shape capable of covering the bottom surface of the housing 20 and is provided on the upper surface thereof with insertion grooves 22a, 22b, 22c of the housing 20 And a pressing protruding portion capable of fitting is provided. A pair of elastic receiving portions 72, 72 are integrally formed on the upper end surfaces of the pressing projections 71a, 71b, 71c so as to face each other. A bellows-shaped retaining receptacle 73 is provided on both sides of the pressing protrusion 71b located at the center, while the pressing protrusions 73, 71a, 71c, respectively, guide-receiving portions 74 are provided.

Next, a method of assembling the current sensor 1 according to the present embodiment will be described.

2, the measuring printed circuit boards 50 and 51 are assembled through the partition walls 23a and 23c in the housing 20 and a pair of supporting ribs 25a and 25b The first and second control printed boards not shown are positioned. Subsequently, after the liquid crystal display panel 31 of the top cover 30 is electrically connected to the control first and second control substrates through the connection holes 21 of the housing 20, And the upper surface cover 30 is attached and unified on the upper surface.

6, the guide grooves 63 and 63 of the lock member 60 are inserted through the pair of guide projections 40a and 40a at the center of the rear surface of the front cover 40, And is slidably attached in the vertical direction. The lock angles 62 and 62 of the lock member 60 are respectively adjacent to the position regulating arm portions 42 and 42 of the front cover 40 and the front cover 40 Quot; LOCK " and " FREE "

The engagement claw portion 48 of the front cover 40 is engaged with the engagement hole 26 of the housing 20. As a result, connection sockets (not shown) provided on the outward faces of the second printed circuit board for control (not shown) protrude from the connection holes 45a, 45b. Further, a pair of light emitting elements are provided on the outward face of a second printed circuit board for control (not shown) to fit into the operation indication holes 47, 47 of the front cover 40, respectively. Further, the seesaw type switch 46 provided on the front cover 40 can operate the switch element provided on the second control printed circuit board (not shown), and the sensor body 10 is completed.

Subsequently, as shown in Fig. 4A, electric wires 80a, 80b, and 80c are attached to the pressing projections 71a, 71b, and 71c of the base 70 to be secured to the base (not shown) Respectively. Subsequently, the insertion grooves 22a, 22b, and 22c of the sensor main body 10 in a state in which the lock member 60 is pulled up are inserted into the pressing protrusions 71a, 71b, and 71c of the above- Fits and pushes. As a result, the elastic claw portions 24 and 24 of the housing 20 are elastically deformed and engaged with the bell-shaped retaining receptacles 73 and 73 of the catching-preventing base 70, respectively. The sensor main body 10 pushes the electric wires 80a, 80b, and 80c to the pair of elastic receiving portions 72, 72. By pushing down (pushing down) the lock member 60 and pushing the lock angular portion 62 between the elastic claw portion 24 and the position restricting arm portion 42, the sensor main body 10 is prevented from coming off And is locked with respect to the base 70 (Fig. 4B).

5 and 6, the lock angular portion 62 of the lock member 60 restrains the position of the elastic claw portion 24 from the slip prevention base 70 to the sensor main body (not shown) 10 can be reliably prevented from falling off.

As an example of use of the current sensor 1 according to the present embodiment, for example, as shown in Fig. 7, a current sensor 1 is provided for each electric wire 3 of the manufacturing apparatus 2 in the factory, , The power consumption can be always measured and attached to the switchboard 4 to measure the total power consumption. According to the present embodiment, since the electric currents and the like can be measured when the electric wires 80a, 80b and 80c are held between the sensor main body 10 and the base 70 to prevent slipping, It is possible to obtain a current sensor 1 (and / or a power sensor) which is easy to use and can be measured. By providing the base 70 to prevent slipping off, the current sensor can be attached to the wire after the wiring, which is advantageous in that it is convenient.

8 to 11, the current sensor according to the second embodiment is substantially the same as the first embodiment described above except that the current sensor according to the second embodiment is different from the first embodiment in that the connection structure between the sensor main body 10 and the anti- to be.

9 and 10, unlike the first embodiment, the partition wall 23b of the housing 20 is integrally formed without separating both ends thereof.

A through hole 40a for inserting a fixing screw 65 is provided on both side edges of the front surface of the front cover 40 and an engagement slit 40b is provided.

The stopper base 70 fixed by the screws 66 (see Fig. 10) has a screw hole 75a formed in a fixed base 75 projected from both ends of the upper surface of the base 70, 75 and the pressing protrusions 71a, 71c are integrally formed with the engaging ribs 75b, 75b.

The other parts are substantially the same as those of the first embodiment described above, and thus the same parts and the same parts are denoted by the same reference numerals and the description thereof is omitted.

A method of assembling the current sensor 1 according to this embodiment will be described.

The electric wires 80a, 80b and 80c are positioned on the pressing protrusions 71a, 71b and 71c of the base 70, which is screw-fastened to a base (not shown), as shown in Fig. Subsequently, the insertion grooves 22a, 22b, and 22c of the sensor main body 10 are fitted and pushed into the pressing protrusions 71a, 71b, and 71c of the base 70 to be retained. Thereby, the engaging slit 40b provided on the housing 20 is engaged with the engaging rib 75b of the slip-off preventing base 70. Subsequently, the fixing screw 65 is inserted into the through hole 40a provided in the front cover 40 and the male screw portion 65a is screwed into the screw hole 75a of the slip-off prevention base 70 So that the electric wires 80a, 80b and 80c can be securely fixed.

Therefore, according to the present embodiment, the electric wire can be positioned more accurately at a predetermined position, and there is an advantage that a current sensor 1 with high measurement accuracy can be obtained.

As shown in Figs. 12 to 16, the current sensor according to the third embodiment is substantially the same as the first embodiment described above, except that the pressing structure of the base 70 for securing the wire to the wire, And an attachment structure of the sensor main body 10 with respect to the slip-off preventing base 70.

The sensor main body 10 including the housing 20 and the front cover 40 is attached to an engagement hole 26 provided between the partition walls 23a, 23b, 23c of the housing 20, 40 are engaged and integrated with each other. Sliders 67, 67 can be slidably inserted into the lower end portions between the partition walls 23a, 23b, 23c.

The slider 67 is in the shape of a frame having a front shape insertable into the lower end portion between the partition walls 23a, 23b and 23c. As shown in Fig. 16A, the slider 67 has engagement ribs 67a provided on both side surfaces thereof And can be slid between the partition walls 23a, 23b, and 23c to be engaged with each other. 16B, the slider 67 is provided with engaging fulcrums 67b, 67b which can engage with a pair of engaging tabs 70a, 70a provided on an escape preventing base 70 to be described later, And a projection 67c for locking is provided on the upper surface edge portion.

As shown in Figs. 13 and 14, the slip-off prevention base 70 has a planar shape capable of covering the bottom surface of the housing 20, and the insertion grooves 22a, 22b, 71b, 71c which can be fitted to the projecting portions 22a, 22b, 22c. A pair of engaging tabs 70a and 70a for engagement are provided on the respective upper surfaces between the pressing projections 71a, 71b and 71c. A pressing member 78 is fitted to the fitting hole 76 provided in the pressing projections 71a, 71b and 71c through a pressing coil spring 77. [ Although the pressing member 78 has an arc surface 78a whose upper surface is along the outer peripheral surface of the electric wire, this is not necessarily the case, and may be, for example, a substantially V-shaped concave surface.

The other parts are substantially the same as those of the first embodiment described above, and thus the same parts and the same parts are denoted by the same reference numerals and the description thereof is omitted.

A method of assembling the current sensor 1 according to this embodiment will be described.

First, as shown in Fig. 15, an attaching coil spring 77 is attached to the fitting hole 76 of the pressing protrusions 71a, 71b, 71c of the base 70, The member 78 is inserted. The electric wires 80a, 80b and 80c are positioned on the arc surface 78a of the pressing member 78 (Fig. 15).

On the other hand, the engagement ribs 67a of the sliders 67 are slidably engaged with the lower end portions located between the insertion grooves 22a, 22b, and 22c of the sensor main body 10, 15 shows a state in which the slider 67 is attached to the upper surface of the slip-off prevention base 70 for convenience of explanation Fig.

The insertion grooves 22a, 22b, and 22c of the sensor main body 10 are fitted and pushed into the pressing protrusions 71a, 71b, and 71c of the slip prevention base 70, respectively. As a result, the electric wires 80a, 80b, 80c and the urging member 78 push down the coil spring 77, and the bottom surface of the slider 67 abuts against the upper surface of the slip prevention base 70. [ Subsequently, the slider 67 is pushed into the sensor main body 10, so that the engaging claw portions 67b and 67b are engaged with the pair of engaging tabular receiving portions 70a and 70a of the catching- And the locking projections 67c of the slider 67 are locked and prevented from slipping out (FIG. 16B) in the slip-off preventing grooves 20b provided on the bottom surface of the housing 20.

According to the present embodiment, the electric wires 80a, 80b, and 80c are urged by the urging coil spring 77 through the urging member 78. [ Therefore, even when vibration is externally applied, the electric wires 80a, 80b, and 80c come into pressure contact with the bottom surfaces of the insertion grooves 22a, 22b, and 22c and are always positioned at predetermined positions. (1) can be obtained.

The other parts are the same as those of the first embodiment described above, and thus the same parts and the same parts are denoted by the same reference numerals and the description thereof is omitted.

As shown in Figs. 17 to 20, the current sensor according to the fourth embodiment is applied to the current sensor 1 for measuring the current value of three electric wires in the same manner as in the first embodiment described above, A body 10 and an elastic support member 100 assembled in the sensor body 10. [

18 and 19, the sensor main body 10 includes a housing 20, a top cover 30 attached to and integrated with the top surface of the housing 20, A rear cover 90 covering the back surface of the housing 20 and measurement printed boards 50 and 51 disposed in the housing 20. The front cover 40 covers the rear surface of the housing 20,

Although the first and second control boards for control are not shown in the present embodiment in the same manner as in the first embodiment, in order to clarify the connection method, a pair of connection sockets 54a and 54b are shown in Fig. 17A.

As shown in Fig. 18, the housing 20 is box-shaped, the inside of which is partitioned by the partition wall 20c back and forth, and has openings on the front side and the back side. The housing 20 has a connection opening 21 on its upper surface and is notched from its lower end to its back surface so that the substantially U-shaped insertion grooves 22a, 22b, As shown in FIG. Partition walls 23a, 23b, and 23c are integrally formed on the front side of the middle partition wall 20c along the insertion grooves 22a, 22b, and 22c. Particularly, bearing recesses 27 are formed in the lower end edge portions of the opposing inner circumferential surfaces of the partition walls 23a, 23b and 23c, respectively, and bearing projections 27a are projected on the end faces thereof. Further, a bearing groove portion 27b extending vertically is provided above the bearing projection 27a. Support ribs 25a and 25b for supporting two control first and second control substrates (not shown) in the front and rear direction are laterally projected above the partition wall 23b located at the center. In addition, the housing 20 has an engagement hole 26 formed at a predetermined pitch along the opening edge thereof.

The upper surface cover 30 has a planar shape capable of covering the upper surface of the housing 20 and has a liquid crystal monitor 31 buried in the central portion thereof. The liquid crystal monitor 31 is connected to first and second control substrates (not shown) for control assembled in the housing 20 and is connected to a switching operation of a seesaw switch 46 provided on a front cover 40 The current value, the voltage value, and the power value to be measured can be appropriately displayed.

18, the front cover 40 has a front surface shape capable of covering the front surface of the housing 20, and has a shape corresponding to the insertion grooves 22a, 22b, 22c of the housing 20 Shaped notch grooves 41a, 41b, and 41c are provided at positions where the U-shaped notch grooves 41a, 41b, and 41c are formed. As shown in Fig. 19, bearing projections 49a project from the bottom edge portions located between the three notch grooves 41a, 41b and 41c, and the bearing projections 49a A bearing groove portion 49b extending vertically is provided.

As shown in Figs. 19 and 20, the above-mentioned door panels 50 and 51 for measurement are assembled to the back surface of the middle partition wall 20c provided in the housing 20. As in the case of the first embodiment, current sensor elements, for example, GMR elements capable of measuring electric currents of the electric wires are mounted on the above-described gate-type printed boards 50 and 51, A voltage sensor element that can be measured may be mounted.

In the present embodiment, two sheets of the measurement type printed circuit boards 50 and 51 are shown in Figs. 18 and 19. However, two control first and second control substrates disposed through the supporting ribs 25a and 25b on the front side of the middle partition wall 20c are not shown. An IC chip is mounted on a first printed circuit board for control (not shown) located inside and constitutes a control circuit. A pair of connection sockets 54a and 54b are provided on both sides of the outwardly facing surface of the second printed circuit board for control (not shown) located on the front side, and a pair of connection sockets 54a and 54b A pair of upper and lower switch elements and a pair of upper and lower light emitting elements are arranged.

An IC chip for calculating a current value, a voltage value and a power factor measured by the current sensor element and the voltage sensor element mounted on the measurement printed boards 50 and 51 is mounted on the first control printed circuit board (not shown) It may be.

Further, by providing a communication port on either one of the control first and second printed boards, the communication port can receive the voltage value of the externally measured electric wire, and the electric power of the electric wire can be measured by the IC chip.

18 and 19, the rear cover 90 has a rear surface shape capable of covering the rear surface of the housing 20, and has insertion grooves 22a, 22b, 22c Shaped notch grooves 91a, 91b, and 91c are formed at positions corresponding to the U-shaped notch grooves 91a, 91b, and 91c. The rear cover 90 is provided with an engagement claw portion 92 along the outer periphery thereof.

The elastic supporting member 100 has a pair of substantially J-shaped first spring members 102 and 102 extending in parallel from both end edge portions of the rotating shaft 101 and connecting the tips thereof to the slide shaft 103 . Further, a second J-shaped spring member 104 extends from the center of the rotary shaft 101, and a slide shaft 105 is integrally formed at the tip end thereof. The first spring member 102 has a curvature smaller than that of the second spring member 104, and is capable of accommodating wires having different thicknesses. Particularly, bearing recesses 101a are provided on both end faces of the rotary shaft 101 and slide projections 103a and 105a are provided on both end faces of the slide shafts 103 and 105.

Next, a method of assembling the current sensor 1 according to the present embodiment will be described.

First, as shown in Fig. 19, the measurement printed boards 50 and 51 are assembled to the rear face side of the middle partition wall 20c of the housing 20. Further, the control first and second control boards (not shown) are positioned via the pair of support ribs 25a and 25b. After the liquid crystal display panel 31 of the top cover 30 is electrically connected to the control first and second control boards through the connection hole 21, the top cover 30 is connected to the top surface of the housing 20 . Subsequently, the engaging claw portion 92 of the rear cover 90 is engaged with the engaging hole 26 of the housing 20 to close the opening on the back side.

On the other hand, the pivot shaft 101 is fitted to the bearing recesses 27 provided on the inner circumferential surfaces of the insertion grooves 22a, 22b and 22c of the housing 20 and the bearing recesses 101a are fitted to the bearing projections 27a so as to be rotatably supported. The slide protrusions 103a and 105a of the slide shafts 103 and 105 are slidably supported by fitting the slide protrusions 103a and 105a of the slide shafts 103 and 105 into a bearing groove portion 27b provided on the middle partition wall 20c. Then, the engaging claw portion 48 of the front cover 40 is engaged with the engaging hole 26 of the housing 20, and the front opening is sealed. The bearing projections 49a of the front cover 40 are engaged with the bearing recesses 101a of the rotary shaft 101 and the slide projections 103a and 105a of the slide shafts 103 and 105 are engaged with the bearing projections 49a of the front cover 40, Is engaged with the bearing groove portion (49b) of the front cover (40), the assembly of the current sensor (1) is completed.

As a method of using the current sensor 1 according to the present embodiment, as shown in Fig. 20A, the current sensor 1 is positioned above the parallel wires 80a, 80b, 80c, The wires 80a, 80b and 80c are inserted into the insertion grooves 22a, 22b and 22c of the current sensor 1 and are pushed in. As a result, the first spring portions 102, 102 of the elastic supporting member 100 are elastically deformed to support the electric wires 80a, 80b, 80c as shown in Fig. 20B.

Further, the second spring portion 104 is elastically deformed and supported for wires that are wider than the wires 80a, 80b, and 80c.

According to the present embodiment, since the current sensor 1 can be detachably supported on the electric wires 80a, 80b, and 80c with one touch, it is possible to easily measure current and / or electric power at an arbitrary position There is an advantage.

The other parts are substantially the same as those of the first embodiment described above, and thus the same parts and the same parts are denoted by the same reference numerals and the description thereof is omitted.

As shown in Figs. 21 and 23, the current sensor according to the fifth embodiment is substantially the same as the fourth embodiment described above, except that the wire is supported by the binding band 110. Fig.

22, the front cover 40 has a front surface shape capable of covering the front surface of the housing 20, and is provided with insertion holes 22a, 22b, 22c of the housing 20 Shaped notched grooves 41a, 41b, and 41c are provided at corresponding positions. A pair of coupling projections 49 are laterally projected from the upper edge of the notch grooves 41a, 41b and 41c.

23, the rear cover 90 has a rear surface shape capable of covering the rear surface of the housing 20, and is formed in the insertion grooves 22a, 22b, 22c of the housing 20 Shaped notch grooves 91a, 91b, and 91c are provided at corresponding positions. A pair of coupling projections 93 are laterally projected from the upper edge of the notch grooves 41a, 41b and 41c.

The other parts are substantially the same as those of the first embodiment described above, and thus the same parts and the same parts are denoted by the same reference numerals and the description thereof is omitted.

As shown in Fig. 21A, wires 80a, 80b and 80c are inserted and positioned in the insertion grooves 22a, 22b and 22c of the current sensor 1, The wires 80a, 80b and 80c are supported by binding with the binding bands 110 to the male projections 49 and the binding projections 93 of the rear cover 90. [ According to this embodiment, not only the number of parts is small, but also the structure is simple, and the use of the commercially available coupling band 110 is advantageous in that the current sensor 1 with low manufacturing cost can be obtained.

The current sensor according to the present invention is not limited to the three-phase three-wire current sensor described above, and may be applied to a three-phase four-wire current sensor, or to a voltage sensor and a power sensor. It is not always necessary to provide two insertion grooves for measuring the electric current and voltage of the electric wire, and one or more insertion grooves may be provided. It is also possible to integrally form an escape preventing protrusion for preventing the escape of the electric wire from at least one of the facing inner surfaces of the insertion grooves 22a, 22b, 22c provided in the sensor main body 10. [

1: Current sensor
2: Manufacturing apparatus
3: Wires
4: Switchboard
10: Sensor body
20: Housing
20a and 20b:
20c: middle partition wall
21: opening for connection
22a, 22b, 22c:
23a, 23b, 23c:
24:
25a, 26b: support ribs
26: engagement hole
27: bearing recess
27a: bearing projection
27b: bearing groove
30: Top cover
31: LCD monitor
40: Front cover
41a, 41b, 41c:
42: Position regulating arm portion
43: Guide bump
44: Operation display hole
45a, 45b: connection hole
46: Seesaw type switch
47: Operation indicator hole
48: engaging pawb
49: Bonding projection
49a: bearing projection
49b: bearing groove portion
50, 51: Moon type printed board for measurement
60: Lock member
61: operating rib
62: Each part for locking
63: Guide groove
65: Securing screw
65a:
67: Slider
67a: rib for engaging
67b:
67c: projection projection
70: Base for preventing slipping
70a: cross-section for engagement
71a, 71b, 71c:
72: elastic receiving portion
73: Receiving receptacle
74: guide receiver
75:
75a: screw hole
75b:
76: rib for engaging
77: Spring coil spring
78: pressing member
78a:
80a, 80b, 80c:
90: Rear cover
91a, 91b, 91c: notch groove
92: engaging pawb
93: Bonding projection
100: elastic support member
101:
101a: bearing recess
102: first spring member
103, 105: Slide shaft
103a and 105a:
104: second spring member
110: Coupling band

Claims (19)

A current sensor for externally measuring a current flowing through a coated wire,
A sensor body including a current sensor element and having a notch shaped insertion groove into which at least two electric wires can be respectively inserted, and a sensor body which is capable of supporting the electric wire inserted into the insertion groove on the bottom surface of the insertion groove And a supporting means. The method according to claim 1,
And the width dimension of the insertion groove narrows from the notched opening toward the bottom surface. The method according to claim 1,
And the bottom surface of the insertion groove is located at the same depth. The method according to claim 1,
Wherein the bottom surface of the insertion groove has an arc shape. The method according to claim 1,
Wherein a bottom surface of the insertion groove is a substantially V-shaped shape. The method according to claim 1,
Wherein the supporting means is a protrusion for preventing dislocation formed integrally with the sensor main body so as to protrude from at least one of the opposite inner side surfaces of the insertion groove. The method according to claim 1,
Characterized in that the supporting means comprises a separate member separate from the sensor main body. 8. The method of claim 7,
Wherein the supporting means comprises at least one coupling projection projecting sideways from the edge of the insertion groove and a coupling band capable of coupling to the coupling projection. 8. The method of claim 7,
Wherein the supporting means is an elastic supporting member assembled to the sensor main body and pushing out the insertion groove so as to be able to move into and out of the insertion groove and detachably supporting the inserted electric wire. 10. The method of claim 9,
Characterized in that the elastic support member is formed by a plurality of generally J-shaped elastic arm portions arranged side by side. 8. The method of claim 7,
Wherein the supporting means is a base for preventing dislocation which is provided with a pressing protrusion that can be inserted into each of the insertion grooves of the sensor main body and which can be fixed to the sensor main body. 12. The method of claim 11,
Wherein the slip prevention base is provided with a pair of elastic receiving portions capable of being brought into pressure contact with the electric wire on the upper end face of the pressing projection portion. 12. The method of claim 11,
Wherein the slip prevention base has a pressing member housed in an upper end portion of the pressing projection so as to be movable up and down and urged upward through a spring member. 12. The method of claim 11,
Wherein the slip prevention base has an upper end surface of the pressing member formed into an arc shape. 12. The method of claim 11,
Wherein the slip prevention base has an upper end surface of the pressing member in a substantially V shape. The method according to claim 1,
And a display section is disposed on the upper surface of the sensor main body. A voltage sensor capable of measuring the voltage of the electric wire is disposed in the sensor main body of the current sensor according to any one of claims 1 to 16, and a current value measured by the current sensor and a voltage measured by the voltage sensor And a control circuit for calculating a power value by using the control signal. A communication apparatus comprising: a sensor body of a current sensor according to any one of claims 1 to 16, wherein a communication port is provided in the sensor element, and a voltage value of the electric wire received through the communication port, And a control circuit for calculating a power value based on the current value of one of the electric wires. A storage element for storing a voltage value of the electric wire is provided in a sensor main body of a current sensor according to any one of claims 1 to 16 and a current value of the electric wire measured by the current sensor is stored in the storage element And a control circuit for calculating a power value with the voltage value being provided.

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