JP2003324024A - Casing of current sensor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the workability of the manufacturing work of a casing for current sensor device. <P>SOLUTION: The casing for current sensor device is provided with a coil 2 wound around a cylindrical member 7b, a magnet core 3 inserted into the member 7b, and a current detecting element 5a which detects the electric current flowing to the coil 2. The bobbin-like casing is formed of both flange sections 1 and 1, and a connecting section 7 which connects the flange sections 1 and 1 to each other. The connecting section 7 has the cylindrical member 7b around which the coil 2 is wound and, at the same time, is constituted so that the flange sections 1 and 1 may be attached to and detached from the section 7. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing of a current sensor device which is applied to various electronic devices and is used for detecting a current.

[0002]

2. Description of the Related Art A conventional casing of such a current sensor device is constructed, for example, as shown in FIGS. Both flange portions 11, 11 and both flange portions 1
A bobbin-shaped casing is formed by the connecting portion 11a connecting the first and the first connecting portions. The connecting portion 11a is formed in a tubular shape, and an opening portion appears outward at a connecting portion with both flange portions 11, 11 to be connected. A core mounting frame 11b is provided on the outer side of both the flange portions 11 and 11 so as to surround the opening portion to which the connecting portion 11a is coupled and the hole portion formed below the opening portion.

A substantially U-shaped magnet core 3 is inserted inside the core mounting frame 11b. The coil 2 is wound around the outer peripheral surface of the connecting portion 11a, and the coil 2 is formed to have a required pitch dimension and the end portion of the coil 2 is positioned at a predetermined position. With respect to the coil 2 in such a state, an L-shaped insulating sheet 6 is formed so as to cover the end side and the bottom side.
Is positioned.

The floor of the insulating sheet 6 has two flange portions 11,
11 is slid using a step portion formed slightly below the central portion of the coil 11 as a guide, and the end portion of the coil 2 is inserted into a hole 6a formed in the upper side portion of the vertical wall portion of the insulating sheet 6,
Positioning of the end portion of the coil 2 is performed. Further, a claw 6b is provided so as to project on a side edge portion of the vertical wall portion of the insulating sheet 6, and the claw 6b is fitted into a hole portion 11c provided at a side end portion of both flange portions 11, 11. Insulation sheet 6
Is positioned.

In the above-mentioned state, the shield plate 4 having the hole formed at the center and the ears bent at right angles from the bottom to both ends is provided from the bottom of the both flanges 11, 11. Is attached to the step portion of the base portion that is bent outward in an L shape. From below the shield plate 4, a circuit board 5 on which a current detecting element 5a such as a Hall element is mounted is attached to the bases of the flange portions 11, 11.

[0006]

However, in the casing of the above current sensor device, both flange portions 11,
Since 11 and the connecting portion 11a are connected to each other, it is difficult to wind the coil 2 around the connecting portion 11a, and there is a problem that workability is poor in forming and the like.

As a technique for dealing with such a problem, Japanese Patent Laid-Open No.
There is one described in Japanese Patent Publication No. 001-83186. Although the technique described in the above publication is an idea, there is a demand for a casing of a current sensor device that can further improve the workability of manufacture.

In the casing of the current sensor device shown in FIGS. 28 to 30 in which the same components as those in FIGS. 26 and 27 are designated by the same reference numerals, a cover 12 having a substantially L shape for protecting the coil 2 is attached. It is a configuration example.

That is, in the case where the current sensor device is used under severe conditions, for example, it may be required to have earthquake resistance and contact such as when mounted near an adjacent component is considered. The coil 12 must be protected, and the cover 12 that covers the upper portion and the rear portion where the coil 2 is visible in FIG. In this case, it is necessary to prepare the cover 12 separately, which increases the number of parts and the number of assembling steps.

The present invention has been made in view of the above circumstances, and an object thereof is to connect both flange portions by a connecting portion,
It is an object of the present invention to provide a casing of a current sensor device, which is a casing of the current sensor device configured such that a coil is wound around the connecting portion, and which can improve the manufacturing workability. Another object is to provide a casing of a current sensor device which does not increase the number of parts and the number of assembling steps even when it is necessary to cover the coil.

[0011]

A casing of a current sensor device according to the present invention comprises a coil wound around a tubular member, a magnet core inserted into the tubular member, and a current flowing through the coil. In a casing of a current sensor device including a current detecting element for detecting a current detection element, a bobbin-shaped casing is formed by both flange portions and a connecting portion connecting the both flange portions, and the connecting portion is the coil. Is configured so as to have the tubular member wound around, and is configured to be detachable from both the flange portions.

The casing of the current sensor device according to the present invention is characterized in that the connecting member is provided with a positioning portion for the coil to be wound.

In the casing of the current sensor device according to the present invention, one end side of the connecting portion is formed by cutting a tubular body, and the outer peripheral surface of the connecting portion is preliminarily air-core wound from the one end side. It is characterized in that the coil can be attached.

In the casing of the current sensor device according to the present invention, the connecting portion is provided with an insulating portion made of an insulating material, and a portion between the circuit board on which the current detecting element is mounted and the coil is provided. It is characterized by insulation.

In the casing of the current sensor device according to the present invention, the both flange portions serve as side walls, and the peripheral wall is provided so as to cover the internal coil, and the connecting portion forms a part of the peripheral wall. A piece is provided, and a portion of the peripheral wall corresponding to the wall piece is an opening.

The casing of the current sensor device according to the present invention is provided with a partition plate that spreads radially from the outer periphery of the tubular member, and the partition plate rotates the coil near the end of the coil. It is characterized in that a projection for holding the coil is formed so as to be restrained.

In the casing of the current sensor device according to the present invention, a wall piece that concentrically surrounds the tubular member so that an opening is formed at the terminal side of the coil and that forms a chamber in which the coil is provided. Is provided.

In the casing of the current sensor device according to the present invention, there is a peripheral wall provided so as to cover the internal coil with the both flange portions as side walls, and the portion corresponding to the wall piece is an opening, It is characterized in that the wall piece constitutes a part of a peripheral wall that closes the opening.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a casing of a current sensor device according to the present invention will be described below with reference to the accompanying drawings. In each of the drawings, the same constituents are designated by the same reference numerals, and overlapping description will be omitted. In each of the drawings shown in FIGS. 1 to 4, the same components are designated by the same reference numerals, and duplicate description will be omitted. The casing according to the first embodiment is basically in the shape of a substantially rectangular parallelepiped, is provided with flange portions 1 and 1 corresponding to both side plates, and a back plate 1f connects both flange portions 1 and 1. The front side is open, and the top plate and bottom plate are not provided.

Vertically elongated holes 1b for inserting the substantially U-shaped magnet cores 3, 3 are bored at substantially central portions of the flange portions 1, 1, and inner portions of the holes 1b are formed. A frame 1g for receiving the upper arms of the magnet cores 3, 3 is provided. A rail 1h is provided along the lower frame portion of the frame 1g for slidingly guiding the lower end surface of the tubular member 7b forming a part of the connecting portion 7, and the vertical frame portion on the back side of the frame 1g is provided. A stopper 1j that stops the connecting portion 7 by being brought into contact with the inner longitudinal portion of the end surface of the tubular member 7b is provided.

The connecting portion 7 has a structure in which a tubular member 7b is provided on an upper portion of a flat plate-like insulating portion 7c which is a leg, and the end surface of the tubular member 7b is an inner portion of the hole 1b of the flange portion 1. It has the same size as the end face of the frame 1g provided on the. When the end surface of the tubular member 7b and the end surface of the frame 1g face each other and abut against each other, the flange portions 1 and 1 are connected by the connecting portion 7 to form a bobbin-shaped casing. Tubular member 7b
A key-shaped protruding piece 7a serving as a positioning portion for the end surface of the coil 2 to be wound is provided at one end portion on the front side of the.
In the above, the flange portion 1 and the connecting portion 7 are made of resin such as LCP (liquid crystal polymer).

The shield plate 4 has a hole formed at the center,
Both ends are provided with ears bent at right angles from the bottom.
A current detection element 5a such as a Hall element is mounted on the circuit board 5, and its size is substantially equal to the size of the bottom surface of the casing.

The other end side of the tubular member 7b (the end side where the projecting piece 7a is not provided) has a shape obtained by simply cutting the tubular body as shown in FIG. Is not formed. That is, as shown in FIG. 3, the coil 2 preliminarily air-core wound is inserted into the tubular member 7b from one end side of the tubular member 7b.
It can be attached to the outer peripheral surface of.

Two holes 1d are formed at the upper end of the back plate 1f of the casing, and the ends of the coil 2 are inserted into the holes 1d. As shown in FIG. The parts are configured to be positioned.

Using the casing constructed as described above, a current sensor device is manufactured as follows. The coil 2 is subjected to air-core winding as shown in FIG. 3, and forming is performed so as to adjust the shape so that the specified pitch dimension and the end portion of the coil 2 are located at a predetermined position. Next, FIG.
The coil 2 formed as shown in FIG. 3 from the end surface side shown in FIG.
Is mounted, and the tip end surface of the coil 2 is brought into contact with the protruding piece 7a to perform positioning.

Next, the end portion of the coil 2 is inserted into the two holes 1d formed in the upper end portion of the back plate 1f of the casing, and one of the connecting portions 7 is inserted along the rail 1h of the lower frame portion of the frame 1g. The lower end face of the tubular member 7b forming the part is guided by sliding. Frame 1g
When the backside vertical portion of the end surface of the tubular member 7b comes into contact with the stopper 1j which is the backside vertical frame portion, the connecting portion 7 is stopped, and the end surface of the tubular member 7b is fixed to the hole 1b of the flange portion 1. A bobbin-shaped casing is formed by directly facing and abutting the end surface of the frame 1g provided in the inner portion, and connecting both flange portions 1 and 1 by the connecting portion 7. In this state, the insulating portion 7c is located below the coil 2 and is configured to be insulated from the circuit board 5 provided below the insulating portion.

Next, the magnet cores 3, 3 are inserted into the cylinder of the cylindrical member 7b through the holes 1b of the flanges 1, 1, and the end faces of the upper arms of the magnet cores 3, 3 are brought into contact with each other. The shield plate 4 is mounted from the bottom side of both flange portions 1, 1, and the claw portion of the shield plate 4 is inserted into the hole 1k of the base portion and attached. From below the shield plate 4, the circuit board 5
Is attached to the bottom of the casing by baking or the like. The parts are glued in the required parts. In this way, the current sensor device shown in FIG. 2 is completed. In this current sensor device, the current detection can be performed in the same manner as that described in the document shown as the conventional example.

According to the above construction, since the coil 2 can be wound and formed by air-core winding, it is not necessary to work in a narrow portion, and working efficiency can be improved. Further, since the coil 2 is positioned by abutting on the projecting piece 7a provided on the tubular member 7b, the end portion of the formed coil 2 is also positioned at the specified position, and the back plate 1f of the casing is positioned. The insertion work into the two holes 1d formed at the upper end of the can be easily and appropriately performed. Further, the leg portion of the connecting portion 7 is the insulating portion 7c, and by attaching the connecting portion 7, the insulation between the coil 2 and the circuit board 5 can be appropriately performed.

5 to 10 show a casing of the current sensor device according to the second embodiment. In this casing, the flanges 1 and 1 serve as side walls, and the coil 2 inside
It has a peripheral wall composed of a back plate 1f and a top plate 1e provided so as to cover the.

As shown in FIGS. 9 and 10, the connecting portion 7 is provided with a vertical wall portion 17a which is a wall piece which constitutes a part of the peripheral wall. The vertical wall portion 17a is connected to the tubular member 7b by a connecting wall (partition plate) 7e, and the connecting wall 7
e is a positioning (stopper) that spreads from the outer periphery of the tubular member 7b in the radial direction and restricts the position in the width direction when mounting the coil 2 formed as shown in FIG.
It has the function of.

Further, the peripheral wall formed by the back plate 1f and the top plate 1e has a portion corresponding to the vertical wall portion 17a as an opening, and a connecting portion 7 is provided with both flange portions 1 and 1. When inserted into the body, the opening is closed by the vertical wall portion 17a which is the wall piece, and the cover of the coil 2 is completed.

In the casing of the current sensor device constructed as described above, it is not necessary to prepare a cover for protecting the coil 2, and the connecting portion 7 is provided with the both flange portions 1 and 1. Simply insert it into coil 2
There is an advantage that the cover of can be completed. Further, since the coupling wall 7e has a function of positioning (stopper) when the coil 2 is mounted, the coil 2 formed as shown in FIG. The terminal portion of the coil 2 can be inserted into the hole 1d only by inserting the portion 7 into the housing including the flange portions 1 and 1, and the manufacturing operation of the current sensor device can be efficiently performed.

11 to 14 show a modification of the second embodiment. In the casing according to this configuration example, as shown in FIG. 11 and FIG.
Has a peripheral wall formed of a back plate 1f provided so as to cover the internal coil 2 (without the top plate 1e in the configuration example shown in FIGS. 5 to 10).

As shown in FIGS. 13 and 14, the connecting portion 7
Is provided with a wall piece 17b that constitutes a part of the peripheral wall. The wall piece 17b has a shape in which the top plate 1e is further added to the vertical wall portion 17a which is the wall piece in the configuration example shown in FIGS. The portion corresponding to the wall piece 17b is an opening, and when the connecting portion 7 is inserted into the housing including the flange portions 1 and 1, the opening is closed by the wall piece 17b and the coil 2 Is configured to complete the cover.

According to this modification, the same effect as that obtained by the second embodiment can be obtained.

FIGS. 15 to 19 show the casing of the current sensor device, which is composed of a first flange portion which is separated from both flange portions and is provided with a connecting portion, and a second flange portion which is connected to the connecting portion. A configuration example is shown.

In this casing, the left side casing 20 and the right side casing 21 are connected to form the whole in consideration of the mold structure and the assembling property. Here, “right and left” indicates the positional relationship when the casing is viewed in the direction of arrow X in FIG. Further, both the left side casing 20 and the right side casing 21 basically adopt a mold structure which is divided in the left and right direction when the casing is viewed in the direction of arrow X in FIG.

The right casing 21 has a flange portion 11
A cylindrical connecting portion 21a and a core mounting frame 21b are provided in a direction orthogonal to the central portion of the. The core mounting frame 21b
A magnet core 3 having a substantially U-shape is inserted inside the. In addition, the wall portions 21f and 21j that form a part of the casing in combination with the left casing 20.
Are provided by being bent from both side edges of the flange portion 11. Further, directly below the connecting portion 21a, the wall portion 2 is provided.
A plate-shaped insulating portion 21m that connects 1f and 21j is provided.

Inside the walls 21f and 21j, there is a protrusion 21 protruding for alignment with the left casing 20.
c and 21d are provided. A guide groove 21g having an open upper side for positioning the first end portion of the coil 2 is formed in the wall portion 21f, and a notch portion 21h that regulates the inside of the second end portion of the coil 2 is formed. Are formed.

The coil 2 wound around the connecting portion 21a at the required pitch dimension by air core winding is inserted from the open side of the connecting portion 21a along the tubular portion, and the first end of the coil 2 is guided. The second end is attached to the groove 21g while being slightly rotated so that the second end fits in the notch 21h.

The left casing 20 has a flange portion 11
A core mounting frame 11b is provided in a direction orthogonal to the central portion of the. Further, the left casing 20 is provided with a protrusion 11f for restricting the tip of the coil 2 from above. The second portion of the coil 2 is provided below the protrusion 11f.
Is provided with a positioning member 11h that restricts the end portion of the. Further, on both sides of the flange portion 11, the protrusions 21c and 21d provided on the right casing 21 are provided.
Positioning holes 11c, 11c into which the tips of the
Has been drilled.

With the coil 2 attached to the right casing 21, the protrusions 21c, 21 for alignment are aligned with the holes 11c, 11c for alignment of the left casing 20.
d is inserted and fitted. Thereby, the vicinity of the tip of the coil 2 is positioned in the guide groove 21g of the right casing 21, the notch 21h, and the positioning member 1 provided in the left casing 20.
It is attached in a state of being held at a predetermined pitch while being pressed by 1h.

In the above-described state, the shield plate 4 having the hole formed at the center and the ears bent at right angles from the bottom to the both ends is formed from the bottom side of the casing to the flange part 1.
Nos. 1 and 11 are attached to the step portion of the base portion that is bent outward in an L-shape.

The shield plate 4 is mounted from the bottom of the left casing 20 and the right casing 21, and the hole 11k at the base is
The shield plate 4 is attached by inserting the claw portion of the shield plate 4 into 21k. From below the shield plate 4, the circuit board 5 on which the current detecting element 5a such as a hall element is mounted is attached to the base portions of the left casing 20 and the right casing 21 by screws, heat caulking or the like.

Finally, the left casing 20, the right casing 21, the left and right magnet cores 3, the coil 2 and the connecting portion 21a are adhered to each other to complete the current sensor device.

However, in the casing of the above current sensor device, before assembling the left and right casings,
The formed coil 2 has a guide groove 21 at the end.
Since the coil 2 is attached to the connecting portion 21a of the right casing 21 while being slightly rotated so as to fit in the notch portion 21h, the difference between the winding inner diameter of the coil 2 and the outer diameter of the connecting portion 21a cannot be reduced. Rattling occurs when 2 is attached to the connecting portion 21a. For this reason, finally, the connecting portion and the coil are bonded.

Further, since the coil 2 is mounted by rotating it as described above, it is difficult for the coil 2 to have a shape other than a cylindrical shape (it is difficult to rotate the coil 2 if it is not a cylindrical shape). There are large restrictions on various designs.

Further, when the left casing 20 and the right casing 21 are combined, the protrusions 21c and 21d and the holes 11c and 11c must be aligned, and when the coil 2 is not fixed, the left casing 20 and Unless the right casing 21 is moved in parallel and inserted, the coil 2 rotates, and the tip of the coil 2 comes off the grooves of the guide groove 21g and the notch 21h.

Further, in order for the right casing 21 to form the guide groove 21g for positioning the first end portion of the coil 2, an ordinary two-sided split mold cannot be used.
Since only this part has a slide structure, the mold structure becomes complicated.

20 to 2 show the casing of the current sensor device according to the third embodiment which solves this problem.
This will be described with reference to FIG. This casing is basically in the shape of a substantially rectangular parallelepiped, has the same outer size as the conventional one, and is provided with flange portions 1 and 1 corresponding to both side plates, and a back plate 1f has both flange portions 1 and 1. , The front side is open except for a part, and the bottom plate is not provided. The back plate 1f constitutes a peripheral wall provided so as to cover the internal coil 2.

As shown in FIGS. 20, 21, 24 and 25, the connecting portion 7 is provided with a wall piece 17 which constitutes a part of the peripheral wall. The wall piece 17 has a shape in which a top plate 17f is added to the vertical wall portion 17a, and in the peripheral wall constituted by the back plate 1f connecting the flange portions 1 and 1, a portion corresponding to the wall piece 17 is It is an opening and the connecting part 7
When the is inserted into a housing including both flange portions 1, 1,
The opening is closed by the wall piece 17, and the cover of the coil 2 is completed.

The wall piece 17 concentrically surrounds the tubular member 7b so that an opening is formed at the distal end side of the coil 2 and forms a chamber in which the coil 2 is provided.

The wall piece 17 is connected to the tubular member 7b by a connecting wall 7e, and the connecting wall (partition plate) 7e is a plate-like member that connects one end surface of the tubular member 7b and the end surface of the wall piece 17 to each other. From the outer periphery of the tubular member 7b in the radial direction, as shown in FIG.
It has the function of positioning (stopper) when mounting the coil 2 formed as described above.

The coupling wall 7e is provided with a protrusion 7h at a portion located below the end of the coil 2 when the coil 2 is mounted on the tubular member 7b as shown in FIG. . At the tip of the wall piece 17, a convex portion 7g protruding downward
Is formed, and the end of the coil 2 has the projection 7h.
The coil 2 is sandwiched between the convex portion 7g and the convex portion 7g, and is firmly fixed in the room constituted by the tubular member 7b and the wall piece 17.

Inside the upper ends of the flanges 1 and 1, the back plate 1 is provided.
The rail 1h extending from the upper end of f is the top plate 1 of the wall piece 17.
It is provided corresponding to the side of 7f. This rail 1h
When the connecting portion 7 is positioned to connect the flange portions 1 and 1 so as to form a bobbin, the stopper 1j, which is the tip of the stopper, abuts the inside of the vertical wall portion 17a and stops the connecting portion 7. It has the function of

Both flange portions 1 and 1 are bent outward at their lower portions, and are bent downward again to form a base portion 10. The flange portions 1 and 1 are connected to each other on the opening side of the base portion 10.

In the connecting portion 7, the holes 1k of the base portion 10 are provided at both ends of the insulating portion 7c which spreads like a plate as a leg.
A claw portion 7j having a shape that closes is provided.

Using the casing constructed as described above, a current sensor device is manufactured as follows. Forming is performed as shown in FIG. 3 by performing coreless winding on the coil 2 and adjusting the shape so that the coil 2 has a prescribed pitch dimension and the end portion of the coil 2 is located at a predetermined position. Next, the formed coil 2 is attached to the tubular member 7b from the end face side where the coupling wall 7e is not provided in the connecting portion 7 shown in FIG. 25, and the rear end face of the coil 2 is attached to the coupling wall 7e. When they abut, the coil 2 is positioned in the width direction. Further, in this state, the terminal end of the coil 2 is sandwiched by the projection 7h and the projection 7g, and the coil 2 is firmly fixed in the room constituted by the tubular member 7b and the wall piece 17 to prevent rotation. It will be in the state of being

While guiding the side portion of the top plate 17f of the connecting portion 7 on which the coil 2 is mounted and positioned along the rail 1h of the flange portion 1, the connecting portion 7 is moved to the back plate 1f side of the casing. Slide it. At this time, since the rotation of the coil 2 is restrained and the coil 2 is positioned in the width direction, the two grooves 11d formed in the upper end portion of the casing on the side of the back plate 1f are respectively attached to both ends of the coil 2. Is inserted.

When the inside of the vertical wall portion 17a of the connecting portion 7 comes into contact with the stopper 1j at the tip of the rail 1h of the flange portion 1, the connecting portion 7 stops, and both flange portions 1 and 1 are connected by the connecting portion 7. A bobbin-shaped casing is formed by being connected. In this state, the insulating portion 7c is located below the coil 2 and is configured to be insulated from the circuit board 5 provided below the insulating portion 7c.

Next, the magnet cores 3, 3 are inserted into the cylinder of the cylindrical member 7b through the holes 1b of the flanges 1, 1, and the end faces of the upper arms of the magnet cores 3, 3 are brought into contact with each other. The shield plate 4 is mounted from the bottoms of the flanges 1 and 1, and the claws of the shield plate 4 are inserted into the holes 1k of the base 10 and attached. From below the shield plate 4, the circuit board 5 is attached to the bottom of the casing by screws, heat caulking or the like. The parts are glued in the required parts.
In this way, the current sensor device is completed.

In this current sensor device, current detection can be performed in the same manner as in the conventional example. According to the above configuration, the coil 2 is provided with the coupling wall 7e provided on the tubular member 7b.
Since the coil 2 can be positioned in the width direction by abutting against it, and the end portion of the coil 2 can be sandwiched by the projection 7h and the projection 7g to prevent rotation, forming is performed. Further, the end portion of the coil 2 can be positioned at a required position, and the insertion work into the two grooves 11d formed in the upper end portion of the back plate 1f of the casing can be easily and appropriately performed without rotating. And the winding shape of the coil can be not only cylindrical but also rectangular,
It is possible to increase the degree of freedom in design.

Further, in the peripheral wall constituted by the back plate 1f connecting the both flange portions 1 and 1, the portion corresponding to the wall piece 17 is opened, and the connecting portion 7 is connected to the both flange portions 1 and 1. Since the opening is closed by the wall piece 17 and the cover of the coil 2 is completed when the coil 2 is inserted into the housing provided, the winding portion of the coil 2 is completely contained in the casing. Is properly shut off. Thus, the inside of the casing is insulated and the accident of the coil 2 coming into contact with the outside can be prevented.

Further, since the casing structure including both flange portions 1 and 1 can adopt a vertical two-divided mold structure, and the connecting portion 7 side can adopt a lateral two-divided mold structure, There is an advantage that the mold structure can be simplified as a whole.

Although the convex portion 7g is provided on the top plate 7f in the present embodiment, the top plate 7f is provided at a position where it comes into contact with the outer circumference of the coil 2 when the coil 2 is set at a predetermined position. Even if it is configured such that the inner wall is located, the same effect as described above can be obtained. Further, although the cross-sectional shape of the projection 7h is cylindrical, the same effect as described above can be obtained with a rectangular parallelepiped shape or the like.

[0066]

As described above, according to the casing of the current sensor device of the present invention, the bobbin-shaped casing is formed by the both flange portions and the connecting portion connecting the both flange portions. Since the connecting portion has a tubular member around which the coil is wound and is detachably attached to both the flange portions, the coil is attached to the tubular member with the connecting portion removed. It is possible to carry out the work of winding, and it is possible to improve the production workability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a casing of a current sensor device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a casing of the current sensor device according to the first embodiment of the present invention in an assembled state.

FIG. 3 is a perspective view showing forming of a coil used in the casing of the current sensor device according to the present invention.

FIG. 4 is a perspective view of a connecting portion used in the casing of the current sensor device according to the first embodiment of the present invention.

FIG. 5 is an exploded perspective view showing a second embodiment of the casing of the current sensor device according to the present invention.

FIG. 6 is an exploded perspective view showing a second embodiment of the casing of the current sensor device according to the present invention.

FIG. 7 is a perspective view showing an assembled state of the second embodiment of the casing of the current sensor device according to the present invention.

FIG. 8 is a perspective view showing an assembled state of the casing of the current sensor device according to the second embodiment of the present invention.

FIG. 9 is a perspective view of a connecting portion used in the casing of the current sensor device according to the second embodiment of the invention.

FIG. 10 is a perspective view of a connecting portion used in the casing of the current sensor device according to the second embodiment of the present invention.

FIG. 11 is an exploded perspective view showing a modified example of the second embodiment of the casing of the current sensor device according to the present invention.

FIG. 12 is a perspective view showing an assembled state of a modified example of the second embodiment of the casing of the current sensor device according to the present invention.

FIG. 13 is a perspective view of a connecting portion used in the casing of the current sensor device according to the modified example of the second embodiment of the present invention.

FIG. 14 is a perspective view of a connecting portion used in the casing of the current sensor device according to the modified example of the second embodiment of the present invention.

FIG. 15 is an exploded perspective view showing a configuration example of a casing of a current sensor device of a two-flange separation type.

FIG. 16 is an exploded perspective view showing a configuration example of a casing of a current sensor device of a two-flange separation type.

FIG. 17 is a perspective view showing an assembled state of a configuration example of a casing of a current sensor device of a two-flange separation type.

FIG. 18 is a perspective view showing an assembled state of a configuration example of a casing of a current sensor device of a two-flange separation type.

FIG. 19 is a rear view showing an assembled state of a configuration example of the casing of the current sensor device of the two-flange separation type.

FIG. 20 is an exploded perspective view showing a third embodiment of the casing of the current sensor device according to the present invention.

FIG. 21 is an exploded perspective view showing a third embodiment of the casing of the current sensor device according to the present invention.

FIG. 22 is a perspective view showing an assembled state of the casing of the current sensor device according to the third embodiment of the present invention.

FIG. 23 is a perspective view showing an assembled state of the casing of the current sensor device according to the third embodiment of the present invention.

FIG. 24 is a partial cross-sectional view showing the assembly process of the casing of the current sensor device according to the third embodiment of the present invention.

FIG. 25 is a perspective view showing an assembly process of the casing of the current sensor device according to the third embodiment of the present invention.

FIG. 26 is an exploded perspective view of a conventional example of a casing of a current sensor device.

FIG. 27 is a perspective view of the assembled state of the casing of the current sensor device.

FIG. 28 is an exploded perspective view of a conventional example of a casing of a current sensor device having a coil cover.

29 is a perspective view showing a state where the casing of the current sensor device shown in FIG. 28 is assembled.

30 is a perspective view showing a state where the casing of the current sensor device shown in FIG. 28 is assembled.

[Explanation of symbols]

1 Flange 1b hole 1d hole 1e Top plate 1f backboard 1g frame 1h rail 1j stopper 1k hole 2 coils 3 magnet core 4 shield plate 5 circuit board 5a Current detection element 6 Insulation sheet 6a hole 6b nail 7 connection 7a protrusion 7b tubular member 7c insulation part 7e connecting wall 7f Top plate 7g convex part 7h protrusion 7j Claw 10 Base part 11 Flange 11a connection part 11b Core mounting frame 11c hole 11d groove 11f protrusion 11h Positioning member 11k hole 12 covers 17 wall pieces 17a Vertical wall 17b wall piece 17f Top plate 20 left casing 21 Right casing 21a connection part 21b Mounting part 21c protrusion 21d protrusion 21f wall 21g Guide groove 21h Notch 21j wall 21k hole 21m insulation

Claims (8)

[Claims] 1. A coil wound around a tubular member,
In a casing of a current sensor device including a magnet core inserted into the tubular member and a current detection element that detects a current flowing in the coil, both flange portions and a connecting portion connecting the both flange portions are formed. A bobbin-shaped casing is formed, and the connecting portion is configured to include the tubular member around which the coil is wound, and is configured to be detachable from both the flange portions. Characteristic current sensor device casing. 2. The casing of the current sensor device according to claim 1, wherein the tubular member is provided with a positioning portion for a coil to be wound. 3. An end portion side of the tubular member is formed by cutting a tubular body, and an air core wound coil can be mounted in advance from the one end portion side to an outer peripheral surface of the tubular member. The casing of the current sensor device according to claim 1 or 2, wherein 4. The connecting part is provided with an insulating part made of an insulating material to insulate between the coil and the circuit board on which the current detecting element is mounted. The casing of the current sensor device according to any one of claims 1 to 3. 5. A peripheral wall that is provided so as to cover the coil inside by using the both flange portions as side walls, and a wall piece that forms a part of the peripheral wall is provided at the connecting portion, and the peripheral wall of the peripheral wall is provided. The casing of the current sensor device according to claim 1, wherein a portion corresponding to the wall piece is an opening. 6. A partition plate extending in the radial direction from the outer circumference of the tubular member is provided, and the partition plate holds the coil in the vicinity of the end of the coil so as to prevent the coil from rotating. The casing of the current sensor device according to claim 1, wherein a protrusion is formed. 7. A wall piece is concentrically surrounding the tubular member so that an opening is formed at a distal end side of the coil, and a wall piece forming a chamber in which the coil is provided is provided. The casing of the current sensor device according to claim 6. 8. A peripheral wall provided so as to cover the coil inside, with the both flange portions as side walls, and a portion corresponding to the wall piece is an opening, and the wall piece has a peripheral wall covering the opening. The casing of the current sensor device according to claim 7, wherein the casing is configured to form a part.