JPH0531217U - Bobbin with terminal for coil - Google Patents

Abstract

(57) [Summary] [Objective] To provide a bobbin with a coil terminal having a structure in which one coil having approximately twice the number of turns can be obtained without externally connecting the coils formed on both sides of the bobbin. A coil terminal having a through hole 7 formed in the center, a recess 8 for accommodating a winding conductor is formed around the through hole 7, and a plurality of terminals 2 are formed at both left and right ends. In the bobbin 1, terminals 2 processed on both ends of the bobbin
A bobbin with a coil terminal, characterized in that the outermost terminals are connected by a connecting conductor 3 provided on the surface of the recess 8 of the bobbin. [Effect] It is possible to obtain an economical bobbin with a terminal for a coil, which can be obtained as one coil without externally connecting two coils formed on both sides.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a bobbin with a coil terminal used for a thin choke coil or the like.

[0002]

[Prior Art]

 Conventionally, a thin coil has a flat plate-shaped center as shown in the lower part of FIG. 5 in which a through hole 7 for passing a central magnetic leg of a magnetic core is processed, and a plurality of terminals 2 are processed in the left and right ends. As shown in FIG. 5, a U-shaped conductor 4 is arranged on the bobbin 1 with a terminal for the terminal so as to surround the through hole 7 in the center, and its end is electrically connected and fixed to the terminal 2, With an insulating sheet or the like in between, the next U-shaped conductor 4 is connected to the shifted terminal 2 and a coil having a number of turns smaller than the number of terminals N by 1 is provided around the through hole 7. After forming the coil, the coil was made by penetrating the central magnetic leg of the magnetic core 5 through the through hole 7 of the bobbin with the coil terminal. Further, as shown in FIG. 6, one set of coils was formed on the left and right sides of the magnetic core 5 as in the case of FIG. Conventionally, two coils on both sides having a number of turns smaller than the number N of terminals on one side by 1 are externally connected and used as a coil of 2N-2 turns. Therefore, the number of turns of the coil is limited by the number of terminals on one side of the bobbin, and there are problems that the number of turns of the coil cannot be sufficiently obtained and that the external connection is complicated again.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to solve these problems and to provide a bobbin with a coil terminal in which a coil having almost twice the number of turns can be assembled without external connection.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is a coil in which a conductor for electrically connecting two coils, which are formed on the left and right sides of a bobbin, in series is previously processed between terminals on the surface of the winding part of the bobbin. A bobbin with a terminal for use is provided.

That is, the present invention is for a coil in which a through hole is provided in the center, a recess for accommodating a winding conductor is formed around the through hole, and a plurality of terminals are formed at both left and right ends. A U-shaped conductor for winding is arranged around the through hole on a bobbin with a terminal, and the ends of the conductor are sequentially shifted to the terminals one by one and electrically connected and fixed to form a coil. In a bobbin with a coil terminal that forms a coil or a transformer by passing a magnetic leg of a magnetic core through a through hole, the bobbin recessed surface is located between the outermost terminals of the terminals machined at both ends of the bobbin. A bobbin with a coil terminal, characterized in that the bobbin is connected by a connecting conductor provided on the coil.

[0009]

[Action]

 The coils provided on the left and right of the bobbin with coil terminals are connected to the outer terminals of the bobbin with conductors in advance, so that the coil can be wound twice as much without the need for external connection work. A coil with a number of wires can be manufactured.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of a bobbin with a coil terminal according to an embodiment of the present invention. FIG. 2 is an exploded external perspective view showing a procedure of assembling the coil on the coil terminal-equipped bobbin of the embodiment shown in FIG. FIG. 3 is a partial external perspective view of a thin coil assembled using the coil terminal bobbin of the embodiment of the present invention shown in FIG. FIG. 4 is an external perspective view of a bobbin with a coil terminal according to another embodiment of the present invention.

As shown in FIG. 1, a bobbin 1 with a terminal for a coil according to this embodiment is a flat plate made of an insulating resin, and a through hole 7 for passing a central magnetic leg of an incorporated E-shaped magnetic core is provided in the center. Around it, a recess 8 for accommodating the coil winding conductor is provided, and a plurality of terminals 2 (four in FIG. 1) are provided at both ends in the longitudinal direction. The outermost terminals 2 of the terminals at both ends are electrically connected by a connecting conductor 3. Next, as shown in FIG. 2, a U-shaped conductor 4 for winding, which is insulated on both sides of a copper foil, is arranged so as to form a coil around the through hole 7, and its end is placed on the outermost side. Solder the terminal to the next terminal, connect the next U-shaped conductor 4 to the second and third terminals 2 in the same way, and connect to the last terminal 2 in the same way. A number of turns less than the number N is formed around the through hole. Next, the U-shaped conductor 4 is also arranged on the terminal 2 on the other side of the drawing to similarly make a wound coil. As shown in FIG. 3, an E-shaped magnetic core, which is thinner than the vertical direction, is assembled to the coiled bobbin 1 with coil terminals to complete the coil. In FIG. 3, one coil is formed between the terminals on the opposite side of the two terminals 2 to which the connecting conductor 3 is connected, and the number of turns is 2N-2.N, where N is the number of terminals on one side. A coil with 5 turns is obtained.

As another embodiment, as shown in FIG. 4, when the connecting conductor 3 is provided in the recess 8 on the other side of the through hole 7, a winding coil is formed by the U-shaped conductor 4 as in the above-described embodiment. Once created, a coil with 2N-1.5 turns around the through hole is obtained.

[0013]

[Effect of the device]

 As described above in the embodiments, according to the present invention, it is possible to economically realize a coil having approximately twice the number of turns without externally connecting the two coils formed on both sides of the bobbin with the coil terminal. You can get it.

[Brief description of drawings]

FIG. 1 is an external perspective view of a bobbin with a coil terminal according to an embodiment of the present invention.

FIG. 2 is a bobbin with coil terminals of the embodiment shown in FIG.
FIG. 4 is an exploded perspective view showing the procedure for assembling the coil.

FIG. 3 is an external perspective view of a thin coil assembled using the coil terminal bobbin of the embodiment of the present invention shown in FIG.

FIG. 4 is an external perspective view of a bobbin with a coil terminal according to another embodiment of the present invention.

FIG. 5 is an exploded external perspective view showing a procedure for assembling one coil on a conventional bobbin with a coil terminal.

FIG. 6 is an exploded perspective view showing a conventional procedure for assembling two coils on a bobbin with a coil terminal.

[Explanation of symbols]

 1 bobbin with terminal for coil 2 terminal 3 conductor for connection 4 U-shaped conductor 5 magnetic core 6 insulating sheet 7 through hole 8 recess

Claims (1)

[Scope of utility model registration request] 1. A bobbin with a coil terminal provided with a through hole in the center, a recess for processing the winding conductor around the through hole, and a plurality of terminals on both left and right ends. Arranging a U-shaped conductor for winding around the through hole,
The ends of the conductors are sequentially shifted one by one from the above terminals, electrically connected and fixed to form a coil, and the magnetic leg of the magnetic core is passed through the through hole from the outside, and the coil terminal with the coil is provided. In the bobbin, a bobbin with a terminal for a coil is characterized in that the outermost terminals of the terminals machined on both ends of the bobbin are connected by a connecting conductor provided on the concave surface of the bobbin.