JP2001274023A - Surface-mounting inductance element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface-mounting inductance element in which windings and cores are well insulated from each other and for which wiring work can be automated easily. SOLUTION: The windings 12 are respectively wound around a pair of right and left bobbins 2 each having flange sections 4 and 4A on both sides of a cylindrical section 3. Then the bobbins 2 are assembled with each other by butting the flange sections 4 and 4A of one bobbin 2 against the flange sections 4A and 4 of the other bobbin 2. The inserting sections 16 and 16 of the front and rear cores 15 and 15 are inserted into the holes 5 of the bobbins 5 from the front side and rear side and the cores 15 are clamped with a clamp 21. The windings 12 are insulated from the cores 15. Since the windings 12 are respectively wound around the bobbins 2, the winding work of the windings 12 can be automated easily at the time of manufacturing the inductance element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a surface mount inductance element.

[0002]

Conventionally, as this type of surface mount inductance element, there is a surface mount balloon coil in Japanese Patent Application No. 7-105141 (Japanese Patent Application Laid-Open No. Hei 8-306560), an example of which is shown in FIG. As shown in FIG.
A terminal 102 is provided on each side of the base member 101, and a toroidal core 103 is provided on the base portion 101. A pair of windings 104, 105
And the ends 104A and 105A of the windings 104 and 105 are electrically connected to the terminals 102 and 102, respectively.

[0003] The above-described surface-mounted balloon coil has the following problems. First, core 103
Since it is in a ring shape, it is difficult to automate winding of the core 103, and there is a problem that a dedicated device is required. Further, since the winding is performed directly on the core 103, when performing the winding operation, insulation failure between the windings 104 and 105 and the core 103 is easily generated, and it is possible to secure insulation between the two. There are difficult aspects. Furthermore, in the case of the surface mounting inductance element as shown in FIG. 9, when the mounting process on the substrate is to be automated, a device for holding the base 101 is required, and thus there is a surface that is not suitable for automatic mounting.

The present invention is intended to solve such a problem, and provides a surface-mounted inductance element which has excellent insulation between a winding and a core and can easily perform winding work. It is another object of the present invention to provide a surface mount inductance element suitable for automatic mounting.

[0005]

According to a first aspect of the present invention, there is provided a pair of left and right bobbins having flange portions on both sides of a cylindrical portion and assembled by abutting the flange portions, and a winding wound around the bobbin. When,
A terminal portion provided at an end of the winding, a pair of insertion portions to be inserted into the bobbin, and a connecting portion to connect these insertion portions are integrally formed, and before and after inserting these insertion portions into holes of both bobbins. It has a pair of cores.

According to the first aspect of the present invention, a pair of right and left bobbins can be assembled after the respective bobbins are wound, and furthermore, a core can be incorporated into the bobbin. Automation becomes easy. The winding is insulated from the core by the bobbin. further,
Since it can be wound in a line at a fixed position, the product has small stray capacitance and stable leakage inductance.

According to a second aspect of the present invention, a fitting concave and convex portion is provided at an abutting position of the flange portion, and the pair of left and right bobbins having the fitting concave and convex portion are formed in the same shape.

According to the configuration of the second aspect, the flange portions of the bobbins can be positioned and butted by the fitting uneven portion. Since the left and right bobbins have the same shape, manufacturing costs can be reduced, and parts management and the like can be facilitated and manufacturing costs can be reduced.

Further, according to a third aspect of the present invention, a terminal groove is formed on a lower surface of the flange to insert an end of the winding, and the terminal is inserted into the terminal groove. It is.

According to the structure of the third aspect, the terminal can be formed by inserting the end of the winding into the groove, so that a separate terminal fitting and a step of connecting to this fitting are not required.

Further, the invention according to claim 4 is provided with a clamp for clamping the connecting portion of the pair of front and rear cores from front and rear.

According to this configuration, the core for inserting the insertion portion into the hole of the bobbin can be integrated with the pair of bobbins by the clamp.

According to the invention of claim 5, the upper surface of the clamp is flat.

According to the fifth aspect of the present invention, since a flat portion can be provided above the inductance element by the clamp, the flat portion can be sucked and the device can be transferred, and the automatic mounting on the substrate can be easily performed. Become.

According to a sixth aspect of the present invention, a projection is provided on an upper surface of the abutting position of the flange portion, and a positioning portion for sandwiching the projection of both bobbins from right and left sides is provided on the clamp.

According to this configuration, the front and rear connecting portions are held by the clamp, and at the same time, the positioning portions of the clamp sandwich the left and right projections, so that the bobbins on both sides can be integrated in the left and right direction.

According to a seventh aspect of the present invention, the positioning portion is a hole into which the protrusion of each bobbin is engaged.

According to the configuration of claim 7, the projections on both sides are engaged with the holes, so that both bobbins are positioned in the left-right direction and the front-back direction.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 8 show an embodiment of the present invention. A common mode choke coil 1 as an inductance element has a pair of left and right bobbins 2, 2 which are made of synthetic resin and have a predetermined insulation. It is made of an insulating material having properties. The bobbin 2 has flanges 4 and 4A on both sides in the front-rear direction of the cylindrical portion 3, and a through hole 5 penetrating the flanges 4 and 4A on both sides and the cylindrical portion 3 is formed. Flat lower surfaces 6 and 6 are formed on the lower surfaces of the flanges 4 and 4A. Further, butting surfaces 7 and 7 perpendicular to the lower surfaces of the flanges 4 and 4A in a direction intersecting with the lower surfaces 6 and 6 are formed. To form In the upper part of the butting surface 7, a projection 8 is provided on the upper surface of the flange portion 4, 4A. A communication recess 9 communicating with the through hole 5 is provided in the butting surface 7. Further, a fitting groove 10 and a fitting projection 11 are formed above and below the abutting surface 7 of the one flange 4.
And the fitting protrusion 11 and the fitting groove 10 are provided above and below the butting surface 7 of the other flange 4A, and the fitting protrusion 11 is fitted into the fitting groove 10. The bobbin 2 is symmetrical at the center in the front-rear direction, except for the fitting protrusions 10 and the fitting protrusions 11. Therefore, the contact surfaces 7, 6 with the ground surfaces 6, 6 of the same bobbins 2, 2 facing down,
When the 7 are put together, in the front and rear flanges 4, 4A,
The fitting protrusions 11 are fitted into the fitting grooves 10, respectively.

The cylindrical portion 3 of the bobbin 2 is provided with a winding 12 formed by winding a conductive wire whose outer periphery is insulated in a dense coil shape, and the ends 12A of the winding 12 are inserted. The terminal grooves 13 are formed in the ground plane 6. The terminal groove 13 has a guide portion 13A that expands toward the cylinder portion 3 side. Then, by inserting and fixing the end portion 12A in the terminal groove 13, the terminal portion 14 electrically connected to the substrate side is formed.
To form As shown in FIG. 7, the depth of the terminal groove 13 is set to be slightly shallower than the diameter of the end 12A of the winding 12, and a part of the end 12A appears below the ground plane 6.

The core 15 made of a magnetic material has insertion portions 16 and 16 inserted into the through holes 5 and 5 of the bobbins 2 and 2 on both sides, and a connecting portion for connecting the pair of insertion portions 16 and 16.
And the connecting portion 17 is fitted into the communicating recesses 9 of the bobbins 2. And the cores 15, 15
Are attached to the bobbins 2 and 2 from the front and rear, respectively, and the tips of the insertion portions 16 and 16 of the front and rear bobbins 2 and 2 abut inside the cylindrical portions 3 and 3.

Reference numeral 21 denotes a clamp for holding the front and rear cores 15 and 15 made of a plate material having a spring property such as stainless steel, and a flat upper surface portion 22 and arm portions provided at both ends of the upper surface portion 22. The arms 23, 23 elastically contact the outer surface of the connecting portion 17 of the core 15. Further, a hole 24 serving as a positioning portion into which the projections 8, 8 are engaged is formed in the upper surface portion 22.

Next, an operation of assembling the common mode choke coil 1 will be described. First, a wire is wound around the bobbin 2 before assembly by a winding machine or the like to form a winding 12.
Is applied. As described above, since the conductor is wound around the bobbin 2 before assembly, automation of the winding operation is easier than in the case where the conductor is wound around a loop. Since the bobbin 2 is interposed between the core 15 and the winding 12, the bobbin 2
15 and Winding 12 are insulated and
12 can be formed. Also, the end 12A of the winding 12 is connected to the terminal groove.
By inserting the terminal portion 13, the terminal portion 14 can be formed. After the windings 12 are provided on each bobbin 2 in this manner, the butting surfaces 7, 6 of the bobbins 2, 2 are oriented in the same direction, and the butting surfaces 7, 7 are brought into contact with each other.
, The fitting protrusions 11 are fitted into the fitting grooves 10, respectively, and the bobbins 2, 2 are positioned.
2, the insertion portions 16, 16 of the core 15 are inserted into the through holes 5, 5 of the bobbin 2, and the connection portion 17 of the core 15 is connected to the connection recesses 9, 9.
To fit. In addition, the connecting portion 17,
The clamp 21 is fitted so as to sandwich the 17 from the front and rear direction, and at the same time, the clamp 21 is assembled so that the projections 8 on both sides fit into the holes 24. Thereby, the left and right bobbins 2, 2 and the front and rear cores 15, 15 incorporated therein are integrated. In the common mode choke coil 1 configured as described above,
Since the flat upper surface portion 22 is located at the upper portion, the upper surface portion 22 can be sucked and transferred to a predetermined position on the substrate in a state in which the upper surface portion 22 is sucked, and the mounting process on the substrate can be automated.

As described above, in the present embodiment, the cylindrical portion 3 has the flange portions 4 and 4A on both sides thereof.
A and a pair of left and right bobbins 2 and 2 assembled by abutting the peripheral surfaces of A with each other, and windings 12 and 12 wound on the bobbins 2 and 2, respectively.
And terminal portions 14 provided at ends 12A, 12A of the winding 12,
14 and a pair of insertion portions 16 and 16 inserted into the bobbins 2 and 2 and a connecting portion 17 connecting the insertion portions 16 and 16 integrally,
The insertion portions 17 are inserted into the through holes 5, 5 as holes of the bobbins 2, 2.
Since it has a pair of cores 15 and 15 inserted before and after, it is possible to manufacture by winding the bobbins 2 and 2, assembling the pair of right and left bobbins 2 and 2, and further incorporating the cores 15 and 15, Winding because it is wound on a single bobbin 2
Automation of 12 is facilitated, and the winding 12 and the core 15 can be reliably insulated by the bobbin 12. Furthermore, since the windings 12 can be provided in a line at predetermined positions, a product with small stray capacitance and stable leakage inductance can be obtained.

Further, as described above, in this embodiment, claim 2
Corresponding to the above, a fitting groove 10 and a fitting projection 11 are provided at the butting positions of the flanges 4 and 4, and a pair of right and left bobbins 2 and 2 having the fitting uneven portion are formed in the same shape. Therefore, the flanges 4 and 4A between the bobbins 2 and 2 are fitted into the fitting grooves 10 and the fitting protrusions 11.
Thus, they can be positioned and butted, and can be easily assembled. Since the left and right bobbins 2 and 2 have the same shape, manufacturing costs can be reduced, and parts management and the like can be facilitated and manufacturing costs can be reduced.

As described above, in the present embodiment, claim 3
Corresponding to the end 12A of the winding 12 on the lower surface of the flanges 4 and 4A.
A terminal groove 13 for inserting the
The terminal portion 14 can be formed by inserting the end portion 12A of the winding 12 into the terminal groove 13 because the end portion 12A of the winding wire 12 is inserted into the end portion 12A. It becomes unnecessary.

As described above, according to the present embodiment, claim 4
In response to the above, there is provided a clamp 21 for sandwiching the connecting portions 17 of the pair of cores 15 from the front and rear, so that the cores 15 having the insertion portions 16 inserted into the through holes 5 of the bobbins 2 are provided. The clamp 21 can be integrated with the pair of bobbins 2 and 2.

As described above, according to the present embodiment, claim 5
In response to the above, since the upper surface of the upper surface portion 22 of the clamp 21 is flat, a flat portion can be provided on the upper part of the inductance element by the clamp 21. Can be easily implemented.

As described above, according to the present embodiment, claim 6
Corresponding to the above, a projection 8 is provided on the upper surface of the butting position of the flanges 4 and 4A, and a hole 24 is provided in the clamp 21 as a positioning portion for sandwiching the projections 8 and 8 of the bobbins 2 and 2 from both right and left sides. The hole 24 of the clamp 21 sandwiches the left and right projections 8 at the same time as the front and rear connecting portions 17 are sandwiched, so that the bobbins 2 on both sides can be integrated in the left and right direction.

As described above, according to the present embodiment, claim 7
In response to the above, the positioning portions are provided with the projections 8,
8 is the hole 24 to be engaged.
Engages, the bobbins 2 and 3 are positioned in the left-right direction and the front-back direction.

The effect of the embodiment is that the terminal groove 13 is provided.
Has a guide portion 13A which expands toward the cylindrical portion 3, so that the end 12A of the winding wire 12 wound around the cylindrical portion 3 can be smoothly inserted into the terminal groove 13. Further, since the front and rear width of the hole 24 is substantially the same as the front and rear width of the projection 8, the front and rear positions of the bobbins 2 and 2 are also aligned by the hole 24.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
The present invention can be used for various surface mount inductance elements.

[0033]

According to the first aspect of the present invention, there is provided a pair of left and right bobbins which have flanges on both sides of a cylindrical portion and which are assembled by abutting the flanges, a winding wound around the bobbin, A terminal portion provided at the end of the wire, a pair of insertion portions to be inserted into the bobbin, and a connecting portion to connect the insertion portions are integrally formed, and a pair of front and rear portions for inserting the insertion portions into holes of both bobbins. It has a core and has excellent insulation between the winding and the core,
It is possible to provide a surface mount inductance element that can easily automate the winding operation.

According to a second aspect of the present invention, a fitting uneven portion is provided at an abutting position of the flange portion, and the pair of right and left bobbins having the fitting uneven portion are formed in the same shape.
It is possible to provide a surface-mount inductance element that has excellent insulation between a winding and a core and can easily perform winding work.

Further, according to a third aspect of the present invention, a terminal groove for inserting an end of the winding is formed on a lower surface of the flange portion, and the terminal end is inserted into the terminal groove. In addition, it is possible to provide a surface-mount inductance element having excellent insulation properties between the winding and the core and capable of easily performing the winding operation.

Further, the invention according to claim 4 is provided with a clamp for clamping the connecting portion of the pair of front and rear cores from front and rear, and has excellent insulation between the winding and the core, and facilitates automation of the winding operation. And a surface-mounted inductance element that can be performed at a high speed.

According to a fifth aspect of the present invention, the upper surface of the clamp is flat, suitable for automatic mounting, has excellent insulation between a winding and a core, and can easily perform winding work. A mounting inductance element can be provided.

According to a sixth aspect of the present invention, a projection is provided on an upper surface of the abutting position of the flange portion, and a positioning portion for sandwiching the projection of both bobbins from both right and left sides is provided on the clamp. And a surface-mount inductance element which has excellent insulation properties and can easily perform winding work.

According to a seventh aspect of the present invention, the positioning portion is a hole into which the projections of both bobbins are engaged. The positioning portion has excellent insulation between the winding and the core, and facilitates automation of the winding operation. The surface mount inductance element which can be provided can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view of the bobbin as viewed obliquely from below.

FIG. 3 is a perspective view of the bobbin as viewed obliquely from above.

FIG. 4 is an overall plan view of the same.

FIG. 5 is an overall side view of the same.

FIG. 6 is an overall bottom view of the same.

FIG. 7 is a front view of the same.

FIG. 8 is a perspective view of the assembled bobbin viewed from below.

FIG. 9 is a perspective view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Common mode choke coil (inductance element) 2 Bobbin 3 Cylindrical part 4, 4A flange part 5 Through hole 8 Projection 12 Winding 12A End part 10 Fitting groove 11 Fitting projection 13 Terminal groove 14 Terminal part 15 Core 16 Insertion part 17 Connecting part 21 Clamp 22 Top part 24 hole (Positioning part)

Claims (7)

[Claims] 1. A pair of left and right bobbins which have flanges on both sides of a cylindrical portion and are assembled by abutting the flanges, a winding wound on the bobbin, and an end of the winding. A terminal part, a pair of insertion parts to be inserted into the bobbin and a connecting part to connect these insertion parts are integrally provided, and a pair of front and rear cores to insert the insertion parts into holes of both bobbins is provided. Surface mount inductance element. 2. The surface mounting inductance according to claim 1, wherein a fitting concave-convex portion is provided at the abutting position of the flange portion, and the pair of right and left bobbins having the fitting concave-convex portion are formed in the same shape. element. 3. A terminal groove for inserting an end of the winding wire is formed on a lower surface of the flange portion, and the terminal portion is the winding end portion inserted into the terminal groove. The surface mount inductance element according to claim 1. 4. The apparatus according to claim 1, further comprising a clamp for clamping the connecting portion of the pair of front and rear cores from front and rear.
4. The surface-mounted inductance element according to any one of items 3. 5. The surface mount inductance element according to claim 4, wherein an upper surface of said clamp is flat. 6. The surface mount inductance element according to claim 5, wherein a projection is provided on an upper surface of the abutting position of the flange portion, and a positioning portion for sandwiching the projection of both bobbins from right and left sides is provided on the clamp. 7. The surface mount inductance element according to claim 6, wherein the positioning portion is a hole into which the protrusion of each bobbin is engaged.