JPH0555042A - Structure of coil for surface mounting use - Google Patents

Abstract

PURPOSE:To provide a coil, for surface mounting use, wherein, when the coil is formed, a component is made small-sized, a coil-conductor end part can be wound easily on a coil-conductor-end winding part and the coil can be mounted extremely easily and surely without requiring the number of operations when it is mounted on a printed-circuit board at high density. CONSTITUTION:The structure of a coil for surface mounting use is constituted in the following manner: a required number of coil-conductor-end winding parts 5 protrude from the outer circumference of guards 4 which have been formed at both ends of a coil winding part 1; and faces, on one side, of the conductor- end winding parts 5 are made flush.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a coil for surface mounting.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 11, the structure of a coil using a bobbin is a rod-shaped lead portion extending from a base 2 of the winding portion 1 after winding a coil wire around the winding portion 1. After the end of the coil conducting wire was entangled with the wire No. 3, it was generally attached to a solder bath and soldered to fix it. When mounting this coil on a printed board, the lead portion 3 is inserted into the through hole of the printed board, and the coil is attached to a solder bath and soldered.
Was implemented. However, the above work,
In particular, the work of finely winding the end portion of the coil wire around the lead portion 3 must be done manually, and if the winding tightening force varies, the thickness of the lead portion 3 becomes large or small. At the time of mounting on a printed board, it may not be possible to insert it into the through-hole, which requires a lot of man-hours. Recently, there is a strong demand for a coil suitable for surface mounting, because miniaturization of components and high-density mounting on a printed board are required.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the defects of the conventional coil structure as described above, and has a structure capable of easily surface mounting on a printed board. The purpose is to provide.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the structure of a coil according to the present invention is such that a required number of coil wire end winding portions are projected from the outer circumference of a collar provided at both ends of a coil winding portion, One side of the end winding part is flush.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the embodiments shown in the drawings.

FIGS. 1 and 2 are perspective views showing an embodiment of the structure of a surface mounting coil according to the present invention. The structure of the coil is one of the collars 4 provided at both ends of the coil winding portion 1. By projecting a pair of coil wire end winding parts 5 and 5 from the outer periphery of the collar,
At least one surface of the two winding parts 5, 5 is flush with the printed board. At this time, at least the collar 4 and the winding portions 5 and 5 should be made of a super heat resistant plastic material that can withstand the solder melting temperature.

FIG. 3 is a perspective view showing a modification of the first embodiment of the structure of the coil for surface mounting according to the present invention. From the outer circumference of each of the collars 4 provided at both ends of the coil winding portion 1. The coil conductor wire end winding portions 5 and 5'on one side are projected so that at least one surface of each winding portion 5 and 5'is flush. With such a configuration, it is not necessary to align the ends of the coil conductors with the ends of the coil when a coil of the type mounted on a printed board is produced, which is convenient in producing the coil.

FIG. 4 is a perspective view showing a modification of the first embodiment of the structure of the surface mounting coil according to the present invention, which constitutes a transformer. That is, a pair of coil conductor wire end winding portions 5, 5 and 5 ', 5'are respectively made to project from the outer periphery of the collar 4 provided at both ends of the coil winding portion 1, and both winding portions 5, 5, 5', At least one side of 5'is flush.

5 and 6 are a perspective view and a plan view, respectively, showing a second embodiment of the structure of the surface mounting coil according to the present invention. One of the collars 4 is provided at both ends of the coil winding portion 1. A pair of coil conductor wire end winding parts 5 and 5 are projected from the outer periphery of the flange so that the surfaces of these wire conductor end winding parts perpendicular to the axis of the coil winding part 1 are substantially flush with each other. It is a thing.

FIG. 7 is a perspective view showing a modification of the second embodiment of the structure of the surface mounting coil according to the present invention. That is,
A pair of coil wire end winding parts 5, 5 are projected from the outer periphery of one of the flanges on the flanges 4 provided at both ends of the coil winding part 1,
The surfaces of the wire end winding portions that are orthogonal to the axis of the coil winding portion are substantially flush with each other.

FIG. 8 is a perspective view showing another modification of the second embodiment of the structure of the coil for surface mounting according to the present invention.
A transformer is constructed, and two pairs of coil conductor end winding parts 5, 5 and 5 ', 5'are projected in parallel from one flange outer circumference of a flange 4 provided at both ends of the coil winding part 1. The surfaces of the wire end winding portions that are orthogonal to the axis of the coil winding portion are substantially flush with each other.

FIG. 9 is a perspective view showing still another modification of the second embodiment of the structure of the surface mounting coil according to the present invention. That is, a pair of coil conductor wire end winding portions 5 and 5 are projected from the outer periphery of one of the collars 4 provided at both ends of the coil winding portion 1 and are orthogonal to the axes of the coil winding portion of these conductor wire end winding portions. The surfaces to be formed are substantially flush with each other.

FIG. 10 is a perspective view showing a modification of the second embodiment of the structure of the surface mounting coil according to the present invention, which constitutes a transformer. That is, two pairs of coil conductor wire end winding portions 5, 5 and 5 ', 5'are made to project from the outer periphery of one flange of the collar 4 provided at both ends of the coil winding portion 1 so as to intersect these conductor wire end windings. The surface of the winding portion, which is orthogonal to the axis of the coil winding portion, is substantially flush.

In the second embodiment relating to the structure of the vertical coil, the contact surfaces of the coil conductor wire end winding portions 5, 5 and 5'5 'with the printed board are wound by winding the conductor wire ends and soldering. It should be flush after dipping. Further, in the case of two windings at the end of the wire, the windings are formed so as to be flush with the bottom surface of the flange, or by providing a required projection on the bottom surface of the flange, the coil is inclined. It may not be implemented.

Since the surface mounting coil according to the present invention can be constructed in various shapes as described above, if these are prepared as product variations, the degree of freedom in designing the print pattern can be increased. Could be raised.

[0016]

Since the surface mounting coil according to the present invention is constructed as described above, it is possible to easily wind the coil conductor wire end portion around the coil conductor wire end winding portion when the coil is produced. Since it can be mounted on a printed circuit board with high density without requiring man-hours, it can be mounted very easily and surely, which is a significant effect in cost reduction.

[0017]

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the structure of a surface mounting coil according to the present invention.

FIG. 2 is a plan view showing a first embodiment of the structure of the surface mounting coil according to the present invention.

FIG. 3 is a perspective view showing a modification of the first embodiment of the structure of the surface mounting coil according to the present invention.

FIG. 4 is a perspective view showing a modified example of the first embodiment of the structure of the surface mounting coil according to the present invention, which constitutes a transformer.

FIG. 5 is a perspective view showing a second embodiment of the structure of the surface mounting coil according to the present invention.

FIG. 6 is a plan view showing a second embodiment of the structure of the surface mounting coil according to the present invention.

FIG. 7 is a perspective view showing a modification of the second embodiment of the structure of the surface mounting coil according to the present invention.

FIG. 8 is a perspective view showing a modified example of the second embodiment of the structure of the surface mounting coil according to the present invention, which constitutes a transformer.

FIG. 9 is a perspective view showing a modified example of the second embodiment of the structure of the surface mounting coil according to the present invention.

FIG. 10 is a second structure of the surface mounting coil according to the present invention.
FIG. 11 is a perspective view showing a modified example of the above embodiment, which constitutes a transformer.

FIG. 11 is a structure of a coil using a conventional bobbin.

[0018]

[Explanation of symbols]

 1 coil winding part 2 base part 3 lead 4 collar 5 coil wire end winding part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masami Takahashi 2-1-1 Kotani, Samukawa Town, Takaza Group, Kanagawa Prefecture Toyo Communication Equipment Co., Ltd.

Claims (5)

[Claims] 1. A coil winding part and a pair of coil wire end winding parts projecting from the outer circumference of one of the flanges provided on both ends of the winding part, and at least one surface of the pair of coil wire end winding parts. The structure of the coil for surface mounting characterized by being flush. 2. The coil winding portion and the collars provided at both ends of the winding portion respectively project coil end portions of the coil conductor wire and at least one surface of the end portion of the conductor wire is flush with each other. The structure of the surface mounting coil. 3. A coil winding portion and at least a pair of coil conductor wire end winding portions projecting from outer circumferences of a collar provided at both ends of the coil winding portion, and at least one surface of the conductor wire end winding portion is flush. Structure of surface mounting coil characterized by forming a transformer. 4. A pair of coil conductor wire end winding portions are projected from the outer circumference of one of the collars 4 provided at both ends of the coil winding portion, and the pair of coil conductor wire end winding portions are connected to the shafts of the coil winding portion. The surface mounting coil structure according to claim 1, wherein the orthogonal planes are substantially flush with each other. 5. A pair of coil conductor wire end winding portions are projected from the outer periphery of one of the collars provided at both ends of the coil winding portion, and the shafts of the coil winding portion of these conductor wire end winding portions are projected. 5. The structure of the surface mounting coil according to claim 4, wherein the transformer is configured such that the surfaces orthogonal to the above are substantially flush with each other.