JPH09281150A - Current sensor device and method of assembling current sensor device - Google Patents

Abstract

(57) Abstract: A winding process and a working process when forming a current sensor device are simplified. SOLUTION: The first upper half 3 having a semi-annular shape and the first
The first half bobbin piece 1 is formed by accommodating and abutting the semi-annular core in the lower half 4. The second bobbin piece 2 is formed by accommodating and abutting the semi-circular cores in the second semi-circular upper half 6 and the second lower half 7. Next, one end of the copper wire wound around the first bobbin piece 1 is soldered to the first connection hole 13a, and one end of the copper wire wound around the second bobbin piece 2 is connected to the first connection pin. Solder to 14a. Then, by fitting the first connection pin of the first connection hole 13a, each bobbin piece 1,
Electrical connection is made between the copper wires separately wound around 2, and the bobbin pieces 1 and 2 are connected to form a substantially annular current sensor device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current sensor device suitable for use in measuring instruments such as speedometers and tachometers provided in vehicles such as ordinary automobiles and buses, and a method of assembling the current sensor device.

[0002]

2. Description of the Related Art Today, measuring instruments such as speedometers and tachometers for vehicles are driven mainly on the basis of a current value detected by a current sensor device. Conventionally, as one of such current sensor devices,
A Hall element type current sensor device that indirectly detects a current value proportional to the magnetic flux density by providing a Hall element in the magnetic field generated by the current and detecting the magnetic flux density of the magnetic field as a so-called Hall voltage by the Hall element. It has been known.

This Hall element type current sensor device is
As shown in FIG. 11, the bobbin 100 has a substantially annular shape, and a rectangular tubular shape provided so as to be sandwiched by the annular portion 100a of the bobbin 100 along a direction orthogonal to the radial direction of the bobbin 100. Hall element holding portion 101, the Hall element provided in the Hall element holding hole 101a of the Hall element holding portion 101, and as shown in the top view of FIG. 12A and the side view of FIG. The hall element holding portion 10
Except for No. 1, the copper wire 102 is wound along the annular portion 100a in a direction orthogonal to the radial direction of the bobbin 100.

As shown in FIG. 13, the bobbin 100 has a plate-shaped core having a substantially C-shaped upper surface in an upper half 103 having a substantially bottomed cylindrical shape and a lower half 104 having a substantially bottomed cylindrical shape. The core 105 is formed by stacking a plurality of 105a.

The upper half 103 has the upper half 10
A cylindrical portion 106 having an outer diameter smaller than the outer diameter of 3 is provided so as to be coaxial with the central axis of the outer diameter of the upper half 103. The height of the peripheral wall 106a of the cylindrical portion 106 is the same as the height of the peripheral wall 103a of the upper half 103. In addition, the inner peripheral wall of the upper half 103 and the cylindrical portion 106
The width of the recess formed between the outer peripheral wall and the outer peripheral wall is substantially the same as the width of the plate-shaped core 105.
About half of the laminated plate-like cores 105 are accommodated. In addition, the upper half 103 is provided with a holding portion upper half 101b that forms a half of the rectangular-tube-shaped Hall element holding portion 101. The upper half 101b of the holding portion has a length in the longitudinal direction that is the same as the width of the upper half 103, and the height is approximately twice the height of the upper half 103. It is provided so as to protrude from the upper surface of the upper half 103.

Next, the lower half 104 also has the same structure as the upper half 103, and the cylindrical portion 107 having an outer diameter smaller than the outer diameter of the lower half 104 has a center of the outer diameter of the lower half 104. It is provided so as to be coaxial with the axis. The height of the peripheral wall 107a of the cylindrical portion 107 is the same as the height of the peripheral wall 104a of the lower half 104. Further, the width of the recess formed between the inner peripheral wall of the lower half 104 and the outer peripheral wall of the cylindrical portion 107 is substantially the same as the width of the plate-shaped core 105, and the recess forms the stacked layers. The other half of the plate-shaped core 105 is accommodated. In addition, the lower half 104 is provided with a holding portion lower half 101c that forms the remaining half of the rectangular-tube-shaped Hall element holding portion 101. The lower half 101c of the holding portion has a length in the longitudinal direction that is the same as the width of the lower half 104, and the height is approximately twice the height of the lower half 104. It is provided so as to protrude from the bottom surface of the half 104.

Next, the core 105 accommodated in the bobbin 103 has a "substantially C-shaped" upper surface as shown in FIG.
The plate-shaped cores 105a are formed by stacking a plurality of sheets so that the gaps 105b are aligned and fixing the adhesive at three to four places as indicated by the diagonal lines in the figure. The number of stacked plate-shaped cores 105a is set so that the height of the cores 105 formed thereby is slightly lower than the sum of the height of the recess of the upper half 103 and the height of the recess of the lower half 104. Has been adjusted to Also,
The diameter of the hole portion 105c of each of the plate-shaped cores 105a is the same as that of the cylindrical portion 106 provided on each of the halves 103 and 104.
It is slightly larger than the outer diameter of 107, and the width of each gap 105b of each plate core 105a is slightly wider than the length of the Hall element holding portion 101 in the lateral direction. Then, when the core 105 is housed in the bobbin 100, the hall element holding portion 1 is formed in the gap portion 105b.
It is designed to be stored in such a way that 01 is sandwiched.

Such upper half 103 and lower half 10
4 and the core 105 to form the bobbin 100, first, a predetermined number of the plate-shaped cores 105 are laminated so that the respective gaps 105b are aligned, and the predetermined portions are fixed with an adhesive as shown by the hatched lines in FIG. After that, the adhesive is dried to form the core 105.

Next, the core 105 is housed in the lower half 104 in such a manner that the holding portion lower half 101c is sandwiched between the gaps 105b. Next, the upper half 10 is placed in the gap portion 105b of the core 105 housed in the lower half 104.
The upper half 103 and the lower half 104 are butted in such a manner as to insert the upper half 101b of the holding portion 3 of FIG. Then, the upper half 103 and the lower half 104 that are abutted to each other are fixed with an adhesive, and the adhesive is dried.

As a result, as shown in FIG. 14 (a), a portion of the annular portion 100a has a rectangular cylindrical Hall element holding portion 101.
The bobbin 100 is formed in such a manner as to sandwich the.
A left sectional view of the bobbin 100 taken along the line AB in FIG. 14A is shown in FIG. From this figure, each half 103, 1
It can be seen that the cores 105 are housed in the respective concave portions 04, and the hole portion 101a for inserting the hall element is formed inside the hall element holding portion 101.

Next, a copper wire 10 is attached to the bobbin 100.
2 is wound, the winding rod 105 wound with the copper wire 102 is repeatedly passed through the inner hole 100b of the bobbin 100 as shown in FIG. The copper wire 102 wound around the winding rod 105 is wound along the annular portion 100a of the bobbin 100. Thereby, as described with reference to FIGS. 12A and 12B, the copper wire 102 is wound around the portion excluding the Hall element holding portion 101 to form the current sensor device.

[0012]

However, in such a conventional current sensor device, since the bobbin 100 has an annular shape, the copper wire 1 is inserted into the inner hole 100b of the bobbin 100.
There is a problem that it takes a long time to assemble the current sensor device, which requires a complicated work process of repeatedly passing the wound winding rod 105 of No. 02 and winding the copper wire 102 around the bobbin 100. This has hindered mass production.

Further, since the bobbin 100 has an annular shape, the plate-like core 1 for forming the core 105 is inevitably formed.
05a also needs to have an annular shape. Therefore, the circular plate-shaped core 105a is die-cut from the original plate (ferrite plate) from which the plate-shaped core 105a is die-cut. There was a problem that parts of the parts would be wasted.

As described above, the conventional current sensor device requires a complicated winding process and requires a long time for the assembling process, and there are many waste parts in the original plate for die-cutting the plate-shaped core 105a. The cost was high.

The present invention has been made in view of the above-mentioned problems. It is possible to simplify the assembly process and enable mass production, and at the same time, there is a wasteful part in the original plate for die cutting the plate-shaped core. It is an object of the present invention to provide a current sensor device and a method for assembling the current sensor device, which can prevent the occurrence of costs and reduce the cost.

[0016]

SUMMARY OF THE INVENTION A current sensor device according to the present invention is a current sensor device for detecting the amount of current of an object by means of a Hall element, and one bobbin having a predetermined shape in order to solve the above problems. A plurality of bobbin pieces each having a shape that is divided into a plurality of lines by a line in a direction orthogonal to the central axis of the bobbin, and each of the bobbin pieces has a connecting means for achieving electric connection with each other. A plurality of cores to be housed and wound around each bobbin piece,
The winding wire has one end or both ends connected to the connecting means. The bobbin piece around which the winding wire is wound is formed by connecting the bobbin pieces via the connecting means provided on each bobbin piece.

The method of assembling the current sensor device is as follows.
In a method of assembling a current sensor device that detects a current amount of an object with a hall element, in order to solve the above-mentioned problems, one bobbin having a predetermined shape is formed by a line in a direction orthogonal to a central axis of the bobbin. A plurality of cores are housed in a plurality of bobbin pieces each having a shape that is divided into a plurality of pieces, and each of the bobbin pieces has a connecting means for establishing electrical connection with each other, and a winding wire is wound around each bobbin piece. While wearing
One or both ends of the winding wire are connected to the connecting means. The bobbin piece around which the winding wire is wound is formed by connecting the bobbin pieces via the connecting means provided on each bobbin piece.

In such a current sensor device and a method for assembling the current sensor device, a winding wire is wound on each bobbin piece, and thereafter each bobbin piece is electrically connected via the connecting means. To do. As a result, the assembly of the current sensor device can be facilitated through the liberation of the winding process.

Further, since the plate-shaped core is punched out from the original plate of the core according to the shape of each bobbin piece, when the punching of the substantially annular core is performed, a member is wasted at the center of the core. It is possible to prevent the inconvenience that occurs. That is, the plate cutting position can be adjusted so that the members in the central portion are not wasted. Therefore, the material yield can be improved, and the cost of the current sensor device can be reduced accordingly.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a current sensor device and a method for assembling the current sensor device according to the present invention will be described in detail below with reference to the drawings.

[First Embodiment] << Structure >> As shown in FIG. 1, a current sensor device and a method for assembling a current sensor device according to the present invention are provided with a Hall element in a magnetic field generated by an electric current, By detecting the magnetic flux density of the magnetic field as a so-called Hall voltage by the element, the present invention can be applied to a Hall element type current sensor device that indirectly detects a current value proportional to the magnetic flux density.

In the current sensor device according to the first embodiment, a substantially semi-annular first bobbin piece 1 and a second semi-annular second bobbin piece 2 are butted together. It has a substantially annular bobbin to be formed.

The first bobbin piece 1 includes a first upper half 3 having a semi-bottomed cylindrical shape, a first lower half 4 having the same semi-bottomed cylindrical shape, the upper half 3 and the lower half 4. The core 5 is formed by stacking a plurality of storable semi-annular plate-shaped cores 5a. Further, the second bobbin piece 2 includes a second upper half 6 having a semi-bottomed cylindrical shape,
Similarly, a second lower half 7 having a semi-bottomed cylindrical shape and a core 8 formed by laminating a plurality of semi-annular plate-shaped cores 8a that can be accommodated by the upper half 6 and the lower half 7 are formed. Has been done.

The first lower half 4 and the second lower half 7 are formed with a cylindrical portion having a cylindrical shape which is coaxial with the central axis of the outer diameter formed when these are abutted and connected. A first semi-cylindrical portion 9 and a second semi-cylindrical portion 10 each having a semi-cylindrical shape are provided. A concave portion formed between the outer peripheral wall 9a of the first semi-cylindrical portion 9 and the inner peripheral wall 4a of the first lower half 4 is a core accommodating gap portion 11 for accommodating and accommodating the plate-shaped cores 5a in a stacked manner. Has become. In addition, the recess formed between the outer peripheral wall 10a of the second semi-cylindrical portion 10 and the inner peripheral wall 7a of the first lower half 7 is a core accommodating gap for accommodating the plate-shaped cores 8a in a stacked manner. It is part 12.

Next, on the first lower half 4, the first connecting portion is formed in such a manner that it projects from one end of the first semi-cylindrical portion 9 through one end of the lower half 4 in the radial direction. 13 are provided. A first connection hole 13a, which is to be fitted with a first connection pin 14a described below, is provided at a substantially intermediate position of the first connection portion 13. In addition, the second
The lower half 7 is provided with a second connecting portion 14 in such a manner as to project from one end of the second semi-cylindrical portion 10 in the radial direction through one end of the lower half 7. This second
The first connecting hole 13a is provided at a substantially intermediate position of the connecting portion 14 of
There is provided a first connection pin 14a for fitting with.

As will be described later, the above-mentioned first connection hole 13a.
And the first connection pin 14a, when the first and second bobbin pieces 1 and 2 which are respectively formed separately are connected to form one bobbin, the first and second bobbin pieces 1 and 1 are formed. It serves as a connector terminal for electrically connecting the two.

Next, the opposite end of the first connecting portion 13 of the first lower half 4 and the opposite end of the second connecting portion 14 of the second lower half 7 are The third and fourth connecting portions 15 and 16 are respectively connected by heat welding. Partition members 15a and 16a are provided in the vicinity of the connecting portions 15 and 16 in such a manner as to partition the core accommodating gap portions 11 and 12, respectively. Therefore, when the lower halves 4 and 7 are connected, the partition members 15 are
While the a and 16a are opposed to each other, a gap portion having a substantially rectangular upper surface is formed. This gap portion is a Hall element housing portion for housing the Hall element.

Next, the first and second upper halves 3, 6
Has a semi-cylindrical semi-cylindrical portion at the center thereof, similarly to the corresponding lower halves 4, 7, and the outer peripheral wall of each semi-cylindrical portion and the outer peripheral wall of each upper half 3, 6 The laminated plate-shaped core 5a or the plate-shaped core 8a is housed in the core housing space, which is a recess formed between the two.

Further, the first upper half 3 is provided with a fifth connecting portion 17 in such a manner as to project in the direction opposite to the radial direction of the upper half 4, and the fifth connecting portion 17 is omitted. A second connection hole 17a is formed at the intermediate position to be fitted with the second connection pin 18a. Further, the second upper half 6 is provided with a sixth connecting portion 18 in such a shape as to project in the direction opposite to the radial direction of the upper half 6.
The second connecting hole 17a is provided at a substantially intermediate position of the connecting portion 18 of
A second connection pin 18a that fits with is provided.

The second connection hole 17a and the second connection pin 18a are provided for electrically connecting the first and second bobbin pieces 1 and 2 with each other. Thirteen
Unlike a and the first connection pin 14a, it is a connection portion for mechanically connecting the bobbin pieces 1 and 2 described above.

The opposite end of the fifth connecting portion 17 of the first upper half 3 and the opposite end of the sixth connecting portion 18 of the second upper half 6 are respectively The seventh and eighth connecting portions 19 and 20 are connected by heat welding. A partition member is also provided in the vicinity of each of the connecting portions 19 and 20 so as to partition the gap for accommodating each core. Further, the upper surface of each of the connecting portions 19 and 20 is "substantially U-shaped" and "substantially inverted U-shaped", respectively. When the upper halves 3 and 6 are connected, the Hall element is connected. A hall element insertion hole 20c (see FIG. 3B) for guiding to the hall element housing portion is formed.

<< Assembly Process >> Next, an assembly process of the current sensor device according to the first embodiment having such a configuration will be described. The process of assembling the current sensor device is roughly divided into a bobbin piece assembly process in which the plate-shaped cores 5a and 8a are housed and the first and second bobbin pieces 1 and 2 are assembled, and the assembled bobbin pieces 1 and 1. It comprises a winding step of performing winding processing on No. 2 and a connecting step of connecting the bobbin pieces 1 and 2 subjected to the winding processing and accommodating the Hall element.

<Assembling Step of Bobbin Piece> First, in the assembling step of the bobbin piece, as shown in FIG. 1, a plurality of semi-annular plate-shaped cores 5a and 8a are arranged and laminated respectively. As indicated by diagonal lines, several cores are bonded with an adhesive to form cores 5 and 8. Each plate-shaped core 5
The number of laminated layers a and 8a is such that when the first bobbin piece 1 is formed by combining the first upper half 3 and the first lower half 4, and the second upper half 6 and the second lower half are formed. When the second bobbin piece 2 is formed by combining 7 and 7, the cores 5 and 8 are stacked in the respective bobbin pieces 1 and 2 without rattling. The thickness of each of the plate-shaped cores 5a and 8a is set so that the magnetic characteristics of the cores 5 and 8 formed by laminating a plurality of sheets have predetermined magnetic characteristics suitable for the current sensor device. Of course there is.

Next, the cores 5 and 8 formed in this way
Are housed in the core housing gaps 11 and 12 of the first and second lower halves 4, respectively. At this time, the cores 5 and 8 are accommodated in the core accommodating gaps 11 and 12 without any gap, but the cores 5 and 8 are accommodated in such a manner that about half of the total height is exposed.

Next, the core 5 of the first lower half 4 in which the core 5 is housed so that about half of the entire height is exposed.
From above, the lower half 4 and the upper half 3 are butted against each other in such a manner as to cover the core accommodating gap portion of the first upper half 3, and the heat welding process is performed along the butted surface. The first bobbin piece 1 having a semi-annular shape is formed as shown in FIG. Similarly, the core storing gap of the second upper half 6 is covered from above the core 8 of the second lower half 7 in which the core 8 is stored so that about half of the entire height is exposed. The lower half 7 and the upper half 6 are butted in such a manner, and heat welding is performed along the butted surfaces to form the second bobbin piece 2 having a semi-annular shape as shown in FIG. To do. This completes the bobbin piece assembly process.

<Winding Step> Next, a winding step is carried out in which the bobbin pieces 1 and 2 thus assembled are subjected to a winding process. In this step, as shown in FIG. 3 (a), the copper wires 20a and 20b are separately wound around the bobbin pieces 1 and 2, respectively. Since it has a substantially semi-annular shape, the copper wires 20a, 2
The operation of winding 0b can be easily performed without any limitation.

That is, when the bobbin has an annular shape as in the conventional case, the winding rod 11 having the copper wire 102 wound around the hole 100b of the bobbin as described with reference to FIG.
It is necessary to wind the copper wire 102 around the bobbin by repeatedly passing 0, which restricts the winding operation of the copper wire, but the first embodiment is concerned. Since the bobbin of the current sensor device according to the present invention has a semi-annular shape obtained by dividing an annular bobbin into two equal parts, there is no hole 100b, and the winding of the copper wire is not restricted by this. It can be dressed. Therefore, the winding rod 110 can be dispensed with, and the equipment for automatically winding the copper wires 20a and 20b can be designed freely, for example, by increasing the winding operation. The degree can be compensated.

Next, when the winding of the copper wires 20a and 20b on the bobbin pieces 1 and 2 is completed in this manner, the above-mentioned winding on the first bobbin piece 1 is performed as shown by hatching in FIG. Copper wire 2
0a is soldered to the first connecting hole 13 provided in the first connecting portion 13, and one end of the copper wire 20b wound around the second bobbin piece 2 is connected to the second connecting hole 13. Solder to the first connection pin 14 provided on the portion 14. As a result, the winding process of performing the winding process on each bobbin piece is completed.

A sandwiching member for sandwiching the copper wires 20a, 20b at the portions to which the copper wires 20a, 20b of the first connection hole 13a and the first connection pin 14a are soldered, respectively, is provided. However, the soldering may be omitted and the soldering may be omitted.

<Connecting Step> Next, when such a winding step is completed, a connecting step for connecting the bobbin pieces 1 and 2 is performed. In this step, as shown in FIG. 2, the first and second connection holes 13a and 17a of the first bobbin piece 1 and the first and second connection pins 14a and 18a of the second bobbin piece 2 are formed.
And the third bobbin piece 1 of the first bobbin piece 1
Connecting portions 15 and 19 and the fourth and eighth bobbin pieces 2
Butt the connection parts 16 and 20 of. Then, heat welding is performed along the abutting portion between the third and seventh connecting portions 15 and 19 of the first bobbin piece 1 and the fourth and eighth connecting portions 16 and 20 of the second bobbin piece 2. A process is performed to form a substantially annular current sensor device.

As described above, the first connection hole 13a provided on the first bobbin piece 1 side and the first connection pin 14a provided on the second bobbin piece 2 side are the connectors. It is a terminal. Therefore, this first connection hole 13
The copper wire 20a wound on the first bobbin piece 1 side and the copper wire 20b wound on the second bobbin piece 2 side are electrically connected to each other via a and the first connection pin 14a. It can be electrically connected without adversely affecting.

Next, by connecting the bobbin pieces 1 and 2 on which the copper wires 20a and 20b are wound in this manner, as shown in FIG.
As shown in (b), the third and seventh bobbin pieces 1 are
Connecting portions 15 and 19 and the fourth and eighth bobbin pieces 2
Hall element insertion holes 20c that are directly connected to the Hall element accommodating portions are formed in the abutting portions of the connection portions 16 and 20. Therefore, the Hall element is accommodated in the Hall element accommodating portion via the Hall element insertion hole 20c, and the connection process is completed, and the current sensor device is completed.

<< Effects of First Embodiment >> As is apparent from the above description, the current sensor device according to the first embodiment of the present invention includes the semi-annular bobbin pieces 1 and 2, respectively. By separately assembling and performing the winding process and connecting the bobbin pieces 1 and 2 to each other, the assembling process of the current sensor device can be simplified through the simplification of the copper wire winding process. Therefore, the productivity of the current sensor device can be improved and the cost of the current sensor device can be reduced.

Further, as shown in FIG. 9, since the plate-shaped core 105a provided in the conventional current sensor device has an "uppermost C-shaped" upper surface, for example, the length in the lateral direction is the plate-shaped. From a rectangular original plate (ferrite original plate) having a length substantially the same as the diameter of the core 105a and a length in the longitudinal direction of 5 times the diameter of the plate-shaped core 105a, it goes without saying that there are 5 sheets. Although only the plate-shaped core 105a of FIG. 10 can be removed, the plate-shaped core 5a (8a) provided in the current sensor device according to the first embodiment has a substantially semi-annular shape. 11 from the same size original plate as shown
The plate-shaped cores 5a and 8a (corresponding to five and a half of the plate-shaped core 105a) can be plate-cut. Therefore, the raw material (raw plate) of the plate-shaped cores 5a and 8a can be effectively used, and also from this point, the cost reduction can be realized.

[Modification of First Embodiment] Next, the first upper half 3 and the first lower half 4, the second upper half 6 and the second lower half 7, and the first The third and seventh connecting portions 15 and 19 of the bobbin piece 1 and the fourth and eighth connecting portions 16 and 20 of the second bobbin piece 2 are heat-welded, respectively. By performing the modified example described below, these heat welding can be completely omitted.

That is, the first upper half 3 and the second upper half
The upper half 6 is provided with one or more fitting pins, and the first lower half 4 and the second lower half 7 are provided.
Is provided with a fitting hole for fitting with the fitting pin, and the both are connected through the fitting pin and the fitting hole. Similarly, one or a plurality of fitting pins are provided on the third and seventh connecting portions 15 and 19 of the first bobbin piece 1, respectively, and the fourth and eighth fitting pins of the second bobbin piece 2 are provided. A fitting hole for fitting the fitting pin is provided in the connecting portions 16 and 20, and the fitting pin and the fitting hole are connected to each other.

At this time, the diameter of the fitting hole is set to a diameter that allows the fitting to be tightly fitted to the connecting pin, or the tip of the connecting pin is formed into a hook shape in which a "barb" is provided in a direction opposite to the inserting direction. After assembly, a stable assembled state can be realized by adopting a structure in which the connection pin is "returned" to prevent the connection pin from falling off.

As described above, the connection between the first upper half 3 and the first lower half 4 and the connection between the second upper half 6 and the second lower half 7 through the fitting pin and the fitting hole. By making the connection, all the heat welding steps in the current sensor device can be omitted, and the assembling step can be further simplified.

Since the bobbin assembled as described above is subjected to winding processing to form the current sensor device,
The falling force can be prevented by the tightening force of the winding process. Therefore, the fitting hole and the connection pin are not required to be designed with high precision, and the productivity of the current sensor device can be more significantly improved from the viewpoint of easy design. .

[Second Embodiment] << Structure >> Next, a current sensor device according to a second embodiment of the present invention will be described. As shown in FIG. 5, the current sensor device according to the second embodiment has first and second lid portions 2 formed by equally dividing an annular plate member in the radial direction.
1, 22 and first and second storage portions 24 and 25 formed by dividing a bottomed cylindrical member into two equal parts in the radial direction, and the storage portions 24 and 25 each having a substantially semi-circular annular shape. Plate-shaped core 23
It has a bobbin formed by a core 23 formed by accommodating and stacking a sheets of a.

As shown in FIG. 6, the bottom surface of each of the first and second lid portions 21 and 22 is formed along the semi-annular shape of each of the lid portions 21 and 22. Bottom plates 26 and 27 are provided on the outer peripheral side and the inner peripheral side, respectively, so as to form predetermined steps. The predetermined step formed on the inner peripheral side of each of the lid portions 21 and 22 is a step along the outer circumference of the semi-cylindrical semi-cylindrical portions 28 and 29 provided in the storage portions 24 and 25. The predetermined step formed on the outer peripheral side of each of the lid portions 21 and 22 is defined by the above-mentioned storage portions 24 and 25.
There is a step along the inner circumference of the.

Two leaf springs 30 are provided on the bottom plates 26 and 27 provided on the respective lids 21 and 22. Each of the leaf springs 30 is formed of a durable rectangular plate-like member such as steel, and is provided so as to have a predetermined angle with respect to each of the bottom plates 26 and 27, and its It is bent so as to be substantially parallel to the bottom plates 26 and 27 from the middle portion to the tip portion (the end portion on the side opposite to the installation end portion). As will be described later, the portion of each leaf spring 30 from the intermediate portion to the tip portion is when the first and second lid portions 21 and 22 and the first and second storage portions 24 and 25 are butted. In addition, each of the storage units 24, 25
It becomes a pressing portion 30a that comes into contact with the plate-shaped core 23a housed inside and presses and fixes the plate-shaped core 23a by the elastic force of the plate spring 30.

The both ends of each of the lids 21 and 22 are connected to each other by connecting portions 21a, 21b,
22a and 22b. Of these, the connection part 21
Although b and 22b are each flat, the upper surface of the connecting portion 21a is "substantially U-shaped" and the upper surface of the connecting portion 22a is "substantially inverted U-shaped". When the connection portions 21a and 22a are butted to each other and connected,
The top face rectangular hole element insertion hole 31 is formed so as to penetrate from the top face part to the bottom face part of the lid parts 21 and 22. And, such lids 21 and 22
Is a connection portion 21a, 21b, 2 provided at each end.
By heat-welding 2a and 22b so that they face each other, a substantially annular lid portion is formed.

Next, the first and second storage portions 24, 25
Has a semi-bottomed cylindrical shape as described above, and constitutes a bottomed cylindrical storage section when the storage sections 24 and 25 are butted and connected. Further, when the accommodating portions 24 and 25 are abutted and connected to each other to form the accommodating portion, the accommodating portions 24 and 25 are formed into a cylindrical cylindrical portion coaxial with the central axis of the accommodating portion. like,
A semi-cylindrical semi-cylindrical portion 28, 2 is provided in each of the storage portions 24, 25.
9.

The recess formed between the outer peripheral wall 28a of the semi-cylindrical portion 28 and the inner peripheral wall 24c of the first accommodating portion 24 is
A core accommodating gap portion 34 for accommodating the plate-shaped cores 23a in a stacked manner is formed, and similarly formed between the outer peripheral wall 29a of the semi-cylindrical portion 29 and the inner peripheral wall 25c of the second accommodating portion 25. The recessed portion serves as a core accommodating gap 35 for accommodating the plate-shaped cores 23a in a stacked manner.

The outer shape of the substantially annular lid formed by connecting the lids 21 and 22 is substantially the same as that formed by connecting the housings 24 and 25. The outer shape is substantially the same as the outer shape of the bottom cylindrical storage portion, and the inner diameter of the lid portion is substantially the same as the outer shape of the substantially cylindrical cylindrical portion of the substantially bottomed cylindrical storage portion. .

Next, the first accommodating portion 24 is provided with a connecting portion 24a in such a manner as to project from one end of the semi-cylindrical portion 28 through one end of the accommodating portion 24 in the radial direction. . A connection hole 32 for fitting with a connection pin 33 described below is provided at a substantially intermediate position of the connection portion 24a. Further, the second storage portion 25 is provided with a connecting portion 25a in such a manner as to project from one end of the semi-cylindrical portion 29 through one end of the storage portion 25 in the radial direction. The connection hole 32 is provided at a substantially intermediate position of the connection portion 25a.
A connection pin 33 that fits with is provided.

As will be described later, when the two bobbin pieces formed separately are connected to each other by the connection hole 32 and the connection pin 33 to form one bobbin, one bobbin piece and the other bobbin piece are formed. It serves as a connector terminal for electrically connecting with one piece.

Next, the other ends of the storage parts 24 and 25 are
The connection portions 24b and 25b are connected by heat welding. Partition members 36 and 37 are provided near the connection portions 24b and 25b in such a manner as to partition the core storage gap portions 34 and 35. Therefore, when the storage parts 24 and 25 are connected, the partition members 3 are
While 6 and 37 face each other, a gap portion having a rectangular upper surface is formed. The size of the gap portion is determined by connecting the lid portions 21 and 22 to each of the connecting portions 21a,
It has the same size as the Hall element insertion hole 31 formed between the holes 22a.

In other words, each of the partition members 36, 3
Reference numeral 7 denotes the connecting portions 21a and 22a of the lid portions 21 and 22.
The connection portions 2 are formed so as to form a continuous gap of the same size from the Hall element insertion hole 31 formed by
It is provided in the vicinity of 4b and 25b. The hall element inserted through the hall element insertion hole 31 is accommodated in this gap.

Next, each of the plate-shaped cores 23a has a substantially semi-annular shape so that they can be housed in the core-accommodating gaps 34, 35 of the accommodating parts 24, 25 without any gap. The cores 23 are formed by being stacked and housed in the core housing gaps 34 and 35. The number of stacked plate-shaped cores 23a in the core accommodating gaps 34, 35 is such that the lids 21, 22 can be assembled in the accommodating parts 24, 25 in which the plate-shaped cores 23a are stacked and accommodated, and , Leaf springs 3 provided on the lids 21 and 22
The number of stacked sheets is such that the plate-like cores 23a housed in the housing parts 24 and 25 are pressed by the elastic force of 0 without rattling.

The thickness of each plate-shaped core 23a is set so that the magnetic characteristics of the core 23 formed by laminating a plurality of the cores 23a have predetermined magnetic characteristics suitable for the current sensor device. Of course. In addition, the plate-shaped cores 23a stacked and housed in the housing parts 24 and 25 in this manner.
On the other hand, one of the features of the current sensor device is that it is not bonded by an adhesive.

<< Assembly Step >> Next, an assembling step of the current sensor device according to the second embodiment having such a configuration will be described. The steps of assembling this current sensor device are roughly divided into the steps of accommodating the plate-like core 23a and assembling the above-mentioned two bobbin pieces, and winding the bobbin pieces that have been assembled. It comprises a wire process and a connecting process in which the bobbin pieces subjected to the winding process are connected to accommodate the Hall element.

<Bobbin Piece Assembling Step> First, as shown in FIG. 5, the bobbin piece assembling step is performed in the semi-circular annular shape in the core accommodating gap portions 34 and 35 of the accommodating portions 24 and 25, respectively. The plate-shaped cores 23a are stacked and stored. As described above, since the plate-shaped core 23a has a shape so as to be housed in the core housing gaps 34 and 35 without any gap, rattling when stacked and housed is limited to the minimum. To be done.

Next, the lid portions 21 and 22 are assembled to the storage portions 24 and 25, respectively, from the top of the plate-shaped cores 23a thus stacked and stored to complete the bobbin pieces. Specifically, as described with reference to FIG. 6, each lid portion 2 is provided on each bottom surface portion of the first and second lid portions 21 and 22.
Bottom plates 26 and 27 are provided along the semi-annular shape of the lids 1 and 22 to form predetermined steps on the outer peripheral side and the inner peripheral side of the lid portions 21 and 22, respectively. The predetermined step formed on the inner peripheral side of the 21, 22 is a step along the outer circumference of the semi-cylindrical semi-cylindrical parts 28, 29 provided in the storage parts 24, 25. Further, the predetermined step formed on the outer peripheral side of each lid portion 21, 22 is a step along the inner circumference of each of the storage portions 24, 25. Therefore, the bottom plates 26 of the lids 21 and 22 are provided in the gaps 34 and 35 for storing the cores of the storages 24 and 25, respectively.
The respective lid portions 21 and 22 are assembled to the respective storage portions 24 and 25 such that the respective 27 are fitted.

Next, the lid portions 21 and 22 and the storage portions 24 and 25 are heat-welded along the abutting portions of the respective portions.
As a result, a bobbin piece formed by assembling the first lid portion 21 into the first storage portion 24 in which the plate-shaped cores 23a are stacked and stored,
The second accommodating portion 25 in which the plate-shaped cores 23a are stacked and accommodated is
The bobbin piece assembling step of assembling the bobbin piece formed by assembling the lid portion 22 is completed. In this case, since the lid portions 21 and 22 and the storage portions 24 and 25 are heat-welded together, the adhesive bonding step and the drying step, which are required when forming the bobbin, are performed. It can be omitted.

Here, the bottom plate 2 of each of the lids 21 and 22 is
Two leaf springs 30 are provided in each of 6 and 27. For this reason, the lids 21,
By assembling 22, the pressing portions 30a, which are the portions from the substantially middle portion to the tip portion of the leaf springs 30, are connected to the upper surface portion of the plate-like core 23a that is stacked on the top in each of the storage portions 24 and 25. It abuts and presses each plate-shaped core 23a by the elastic force of each plate spring 30. As a result, the storage parts 24,
It can be fixed within 25 without rattling. Therefore, it is possible to omit the bonding process for bonding the plate-shaped cores 23a with the adhesive and the drying process.

<Winding Step> Next, a winding step is performed in which the bobbin pieces thus assembled are subjected to a winding process. In this step, the copper wire 40 is wound around each bobbin piece as shown in FIG. 7A. At this time, each bobbin piece has a substantially semi-annular shape as a whole. Therefore, the copper wire 4
The operation of winding 0 can be easily performed without any limitation.

That is, when the bobbin has an annular shape as in the conventional case, the winding rod 12 wound with the copper wire 11 is repeatedly passed through the hole portion 1a of the bobbin as described with reference to FIG. As a result, it is necessary to wind the copper wire 11 around the bobbin, and this limits the winding operation of the copper wire. However, the current sensor device according to the second embodiment. Since the bobbin has a semi-annular shape obtained by dividing an annular bobbin in two,
There is no such thing as a, and the copper wire can be wound without being restricted by this. Therefore, the winding rod 1
No. 2 can be eliminated, and also with respect to a device for automatically winding the copper wire 40, it is possible to compensate the degree of freedom in designing the device, for example, increasing the winding operation.

Next, when the winding of the copper wire 40 on each bobbin piece is completed in this way, one end of the copper wire 40 is soldered to the connection hole 32 or the connection pin 33 as shown by the diagonal lines in FIG. To do. As a result, the winding process of performing the winding process on each bobbin piece is completed.

The connection hole 32 or the connection pin 33 is used.
The soldering may be omitted by providing a sandwiching member for sandwiching the copper wire 40 and establishing a connection at a portion to which the copper wire 40 is soldered.

<Connecting Step> Next, when the winding step is completed, a connecting step for connecting the bobbin pieces is performed. In this step, as shown in FIG. 7B, the connecting portions 21a and 22a of the bobbin pieces are butted, and
The connecting portion 2 is inserted into the connecting hole 32 provided in the connecting portion 24a.
The connection pin 33 provided on 5a is inserted. Then, the connecting portions 21a and 22a, which are the connecting portions provided at the ends on the opposite side of the connecting portions 24a and 25a provided with the connecting holes 32 or the connecting pins 33, are heat-welded to remove the bobbin pieces. Try to make a perfect bond.

As described above, since the bobbin pieces each have a semi-annular shape, the bobbin having a substantially annular shape can be formed by connecting the two bobbin pieces.
Further, since the connection hole 32 and the connection pin 33 are connector terminals for electrically connecting one bobbin piece and the other bobbin piece, the bobbin pieces are separately wound around the bobbin pieces. The copper wire 40 can be connected via the connection hole 32 and the connection pin 33 without adversely affecting the electrical characteristics.

Next, when the bobbin pieces are connected in this manner, as shown in FIG. 7B, the connecting portions 21a and 22a are connected.
A hole 31 for inserting a Hall element is formed at the abutting portion. Therefore, the connection step is completed by inserting the hall element into the hall element insertion hole 31, and the second step is performed.
All assembling steps of the current sensor device according to the embodiment are completed.

<< Effects of Second Embodiment >> As is apparent from the above description, the current sensor device according to the second embodiment of the present invention has two bobbin pieces each having a semi-annular shape. The first and second storage portions 24 and 25, the semi-annular plate-shaped core 23a that can be stored in the storage portions 24 and 25, and the first and second lid portions 21 and 22 of the storage portions 24 and 25, respectively. The bobbin pieces are formed, assembled and wound for each bobbin piece, and the bobbin pieces are connected to each other by the connection holes 32 provided on one bobbin piece and the connection pins 33 provided on the other bobbin piece. The wire winding process can be simplified. In addition, it is possible to completely omit the conventionally required bonding step using an adhesive and this drying step. For this reason,
It is possible to improve productivity by improving workability,
By searching, the cost of the current sensor device can be reduced.

Since the plate-shaped cores 23a housed in the housings 24 and 25 are fixed by the plate springs 30 provided on the lids 21 and 22, the plate-shaped cores 23a are fixed. The adhering step and the drying step of 23a can also be omitted, and the effect of improving the workability and the like can be more remarkable.

Since the plate-shaped cores 23a are fixed by the plate springs 30, the partition members 36,
Each plate-like core 23 laminated in a form aligned along 37
There is no deviation at each end of a. Therefore, when the bobbin pieces are connected to each other, the end portions of the plate-shaped cores 23a aligned and stacked on one bobbin piece and the end portions of the plate-shaped cores 23a aligned and stacked on the other bobbin piece are connected. The Hall element can be arranged between the two, and the magnetic characteristics of the bobbin can be improved. Moreover, the current detection accuracy of the current sensor device can be improved by improving the magnetic characteristics.

Further, similarly to the current sensor device according to the first embodiment described above, the plate core 23a provided in the current sensor device according to the second embodiment has a substantially semi-annular shape. Therefore, the raw material (raw plate) can be effectively used as shown in FIG.

The lids 21 and 22 and the storages 2 are
4 and 25 are heat-welded, and the bobbin pieces are heat-welded through the connecting portions 21a and 22a.
This may be adhered by an adhesive (a so-called instant adhesive is preferable). As a result, when assembling the bobbin pieces and connecting the bobbin pieces, an adhering step and a drying step are required respectively. Even in this case, the adhering step and the drying step of the plate-shaped core 23a are omitted. Therefore, the bobbin assembly process can be simplified and the like.

[Modification of Second Embodiment] Next, in the above description, the lids 21 and 22 and the accommodating portions 24 and 25 and the bobbin pieces are heat-welded. In the current sensor device, the above-described heat welding step in the bobbin assembly step can be omitted by performing the following modifications.

That is, in the bobbin of the current sensor device according to the modification of the second embodiment, each lid portion 2
One or a plurality of connecting pins are provided on the side of 1, 2 and a fitting hole for fitting the connecting pin is provided on the side of each of the housings 24, 25, and each lid 2 is fitted through the connecting pin and the fitting hole.
1, 22 and each storage part 24, 25 are assembled. Also,
One or a plurality of connection pins are provided on the connection portion 24b side of the first storage portion 24, and a fitting hole for fitting the connection pin is provided on the connection portion 25b side of the second storage portion 25. The bobbin pieces are connected to each other through the connection pin and the fitting hole.

At this time, the diameter of the fitting hole is set to a diameter that allows the fitting to be firmly fitted to the connection pin, or the tip of the connection pin is formed into a hook shape provided with a "reverse" in the direction opposite to the insertion direction, and the above-mentioned assembly is carried out. After that, by adopting a configuration in which the connection pin is "returned" to prevent the connection pin from falling off, the respective lid portions 21 and 2 are
It is possible to realize a stable assembled state of the 2 and the storage sections 24 and 25.

By thus connecting the lids 21 and 22 to the housings 24 and 25 through the fitting pins and the fitting holes, the heat welding process in the bobbin assembly process is completely omitted. Therefore, the productivity can be improved and the cost of the current sensor device can be reduced by further improving the workability.

Since the bobbin pieces assembled as described above are subjected to the winding process, the bobbin pieces are assembled in the storage parts 24 and 25 by the tightening force of the winding process. Since the lids 21 and 22 are fixed, there is no inconvenience that the connecting pin comes out from the fitting hole even when the connecting pin is not formed into a hook shape. Therefore, the design of the connection pin and the fitting hole is not required to be so precise, and the productivity of the current sensor device can be more significantly improved from the viewpoint of easy design. You can do it.

[Final Statement] In the description of each of the above embodiments, the bobbin pieces having a shape obtained by uniformly dividing the substantially annular shape into plural pieces are formed. You may make it form a bobbin piece and connect these and form the said current sensor apparatus.

Further, the substantially annular current sensor device is formed by connecting the respective bobbin pieces divided into a plurality of parts, but this forms an elliptic ring current sensor device or a rectangular tube-shaped current sensor device. You may do it. In this case, the current sensor device is formed by connecting the bobbin pieces that are divided into a plurality of lines by a line in a direction orthogonal to the central axis of the elliptical ring shape or the rectangular tube shape.

In addition, in the above description of the second embodiment, the plate spring 30 presses the plate-shaped cores 2a and 23a. However, this is also a member other than the plate spring, such as a spring or rubber. If it is a member that expands and contracts according to the pressure from the outside as described above, the same effect as the above-described effect can be obtained. Further, without providing the leaf spring 30, the bottom plates 26 and 27 themselves are subjected to an insulating treatment in such a case as rubber, cardboard, plastic, metal (iron, aluminum, etc.) having a thickness capable of pressing the plate-shaped core 23a. This is preferable.) And the like can obtain the same effects as the above effects.

Finally, the above description of each embodiment is only an example of the present invention. In addition to this, for example, three or four bobbin pieces are connected in the same manner as described above to form a substantially annular bobbin. It goes without saying that various modifications can be made in accordance with the design etc. within the range not departing from the technical idea of the present invention.

[0089]

The current sensor device and the method for assembling the current sensor device according to the present invention can simplify the step of winding the copper wire. Therefore, it is possible to simplify the assembly process of the current sensor device and enable mass production.

Further, it is possible to prevent the useless portion from appearing in the original plate for die cutting the core. Therefore, the cost of the current sensor device can be reduced.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing first and second bobbin pieces constituting the current sensor device according to the first embodiment.

FIG. 3 is a diagram for explaining a connecting step for each of the first and second bobbin pieces.

FIG. 4 is a view for explaining a connector terminal for electrically connecting the first and second bobbin pieces.

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

FIG. 6 is a perspective view showing a configuration of a bobbin lid portion of the current sensor device according to the second embodiment.

FIG. 7 is a diagram for explaining an assembly process of the current sensor device according to the second embodiment.

FIG. 8 is a view showing a connector portion of a bobbin divided into two parts in the current sensor device according to the second embodiment.

FIG. 9 is a view for explaining a plate removing step of a plate core provided in a conventional current sensor device.

FIG. 10 is a diagram for explaining a plate removing step of a plate core divided into two parts provided in the current sensor device according to the second embodiment.

FIG. 11 is a diagram for explaining a winding process of the conventional current sensor device.

FIG. 12 is a diagram showing an appearance of a conventional current sensor device in which a copper wire is wound.

FIG. 13 is an exploded perspective view of a bobbin that constitutes a conventional current sensor device.

FIG. 14 is a view showing the outer appearance of a bobbin that constitutes a conventional current sensor device.

[Explanation of symbols]

 1, 2 1st, 2nd bobbin piece 3, 6 1st, 2nd upper half 4, 7 1st, 2nd lower half 5, 8 cores 5a, 8a plate-shaped core 11, 12 core storage gap Part 13a First connection hole forming a connector terminal 14a First connection pin 17a forming a connector terminal 17a Second connection hole 18a Second connection pin 20a, 20b Copper wire 20c Hole element insertion hole 9a Hall element housing Holes 21,22 First and second lids 23a Plate-shaped cores 24,25 First and second storages 26,27 Bottom plate 30 Plate-shaped springs 32 Connection holes 33 Connection pins 34,35 Core storage gaps

Claims (10)

[Claims] 1. A current sensor device for detecting a current amount of an object by a hall element, wherein one bobbin having a predetermined shape is divided into a plurality of lines by a line in a direction orthogonal to a central axis of the bobbin. A plurality of bobbin pieces each having connecting means for electrically connecting each other, a plurality of cores housed in each bobbin piece, and one end wound with each bobbin piece. Alternatively, both ends have winding windings connected to the connecting means, and bobbin pieces wound with the winding windings are connected via the connecting means provided on each bobbin piece. A current sensor device formed by the above. 2. The plurality of bobbin pieces are respectively composed of an upper half and a lower half, and are configured by accommodating the core and abutting the upper half and the lower half at the time of assembly. The current sensor device according to claim 1, which is characterized in that: 3. A plurality of bobbin pieces for accommodating the core, and a part for abutting the core housed in the accommodating part, for pressing the core against a part or a plurality of parts. 2. A pressing member is provided, and the cover member is configured to press and fix the core accommodated in the accommodating portion by the pressing member by fitting with the accommodating portion. The described current sensor device. 4. The plurality of bobbin pieces each have a substantially semi-annular shape, and each of the bobbin pieces has the connecting means at one end, and the other end is connected to the gap to accommodate the Hall element. 4. The current sensor device according to claim 1, wherein the current sensor device is a first and second bobbin piece having a Hall element gap forming portion that forms a portion. 5. The current sensor device according to claim 1, wherein the core is formed by laminating a plurality of plate-shaped cores. 6. A method of assembling a current sensor device for detecting a current amount of an object using a hall element, wherein one bobbin having a predetermined shape is divided into a plurality of lines along a direction orthogonal to a central axis of the bobbin. A plurality of bobbin pieces each having a shape and each having a connecting means for achieving electric connection with each other are respectively accommodated with a plurality of cores, and the winding wire is wound around each bobbin piece, By connecting one end or both ends of the winding wire to the connecting means, and connecting the bobbin piece wound with the winding wire via the connecting means provided on each bobbin piece. A method for assembling a current sensor device, which is characterized by being formed. 7. The bobbin pieces are each composed of an upper half and a lower half, and are formed by accommodating the core and abutting the upper half and the lower half. 6. The method for assembling the current sensor device according to item 6. 8. The plurality of bobbin pieces include a storage portion for storing the core, and a portion for pressing the core against the whole, a part or a plurality of portions of the storage portion that abuts the core. It is composed of a lid provided with a pressing member,
7. The current sensor according to claim 6, wherein by fitting the lid portion with the housing portion, the pressing member provided on the lid portion presses and fixes the core housed in the housing portion. How to assemble the device. 9. The plurality of bobbin pieces each have a substantially semi-annular shape, and each of the bobbin pieces has the connecting means at one end thereof, and the other end thereof is connected to the gap to accommodate the hall element. 7. The first and second bobbin pieces, each having a gap forming portion for a Hall element forming a portion, the bobbin pieces being formed by connecting the bobbin pieces via the connecting means. 7. The method for assembling the current sensor device according to claim 7 or 8. 10. The method for assembling a current sensor device according to claim 6, wherein the core is formed by laminating a plurality of plate-shaped cores.