JPH04125426U - coil bobbin - Google Patents

Abstract

(57) [Summary] [Purpose] To firmly attach a terminal to a terminal plate of a coil bobbin made by integrally molding a bobbin and a terminal plate using thermoplastic plastic. [Structure] Insert a terminal with a tab into the jig hole on the side of the terminal board, which has a step on the top surface and a terminal hole on the bottom surface, for bending the terminal, bend the tip of the terminal, and then Fix it to the terminal board.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a coil bobbin equipped with a terminal for winding a coil around a bobbin of a transformer, etc. It is related to.

0002

[Conventional technology]

Conventionally, in this type of coil bobbin, for example, There is something described in the No. This conventional coil bobbin has a tsuba at the upper and lower ends, and the lower end also serves as a tsuba. Winding is applied to a coil bobbin that has a terminal section, and the wire is wound on a coil bobbin that has a terminal section. Create a horizontal hole that becomes narrower, and make sure that the upper end protrudes from the bottom of this terminal part into the horizontal hole. Place a terminal pin in the sea urchin, bend the upper end of this terminal pin to the inner side of the horizontal hole, and insert this terminal Below the pin there is a coil part that connects the winding lead wire.

0003

[Problem that the idea aims to solve]

The coil parts made with the conventional technology as described above are installed in the horizontal hole provided on the side of the lower end of the tsuba. , insert the terminal into the horizontal hole from the bottom surface of this terminal part, and make sure that the top end of this terminal protrudes. A terminal with a bent end will resist the downward pulling force due to the tip protruding into this horizontal hole. It cannot be removed because it is bent.

0004 However, the tip of the terminal protruding into this side hole can be bent by bending it. A gap is created between the horizontal hole and the terminal, which prevents pressure from below from being applied to this terminal. Due to the pressure, loosening occurs between the terminal and the terminal. Due to this loosening, forces such as vibrations are In addition to the bobbin, there were other problems such as bobbin terminals coming off.

[0005] In addition, in the above conventional example, the tip of the terminal that protrudes into the side hole is bent, so the side hole is bent. Because a large force is applied from the outside, defects such as cracks in the terminals cannot be prevented. It was.

[0006] This invention solves the above problems and provides a coil bobbin that does not cause problems. It was made by

[0007]

[Means to solve the problem]

In order to solve the above problems, this invention is made of thermoplastic plastic and coil Attach the bobbin for winding the coil and the terminal board with the terminal for connecting the coil lead wires together. This is a coil bobbin made by body shaping.

[0008] A jig hole is provided from the side of the terminal plate of the coil bobbin, and the jig hole is placed approximately perpendicularly to the bottom surface of this jig hole. A terminal hole from which the upper end of the terminal protrudes is provided, and the upper surface of this jig hole is located deeper than the axis of the terminal hole. A terminal is provided with a step that is wide on the side and narrow on the back side, and a tab is provided in the terminal hole. Insert the jig into the jig hole, and insert the tab of the terminal protruding into the jig hole into the jig. Bend it further and push the terminal into the back of the jig hole while touching the top of the jig hole. This allows the terminal to be firmly attached to the terminal plate of the coil bobbin.

[0009]

【Example】

An embodiment of the present invention will be described with reference to the drawings. Figure 1 is a cross-sectional view of a coil wound around the coil bobbin of the present invention, and Figure 2 is a cross-sectional view of the coil bobbin of the present invention. FIG. 3 is an enlarged cross-sectional view of main parts.

0010 Bobbin 2 for winding coil 5 and terminal 4 for wiring and connecting the lead wire of coil 5 Terminal board 3 is a coil made of thermoplastic plastic. Lubobin 1. a terminal hole 3d provided in the terminal board 3 into which the terminal 4 is inserted from below; A jig hole 3a is provided in which the tip of the terminal 4 inserted into this terminal hole 3d protrudes approximately vertically. The upper surface of the jig hole 3a has a structure with a step 3b that has a high outer part 3a and a low inner part 3c. 3b is provided deeper than the axis of the terminal hole 3d.

[0011] Also, insert the terminal 4 provided with the tab portion 4b into the terminal hole 3d, and align the tip with the step of the jig hole 3a. 3b to the top surface of the outside, insert the terminal bending jig 5 into the jig hole 3a, and While bending the tip of the terminal 4 from the tab 4b, bend it to the inner part 3c of the step 3b of the terminal hole 3d. Press-fit the tip of the terminal 4 into the coil bobbin 1 by pressing it against the back wall of the jig hole 3c. Fix it to terminal board 3.

0012

[Effect of the idea]

Since the present invention is structured as explained above, how is it described? You can get an effect like this. Place the terminal in the terminal hole provided on the terminal plate of the coil bobbin with a step that is higher on the outside and lower on the back. Insert the tip up to the top of the outer surface of the jig hole, and use the jig to bend the tab part to the back. and press fit into the jig hole.

[0013] Since this terminal is fixed in the jig hole, the terminal hole should be larger than the terminal; This makes it extremely easy to insert the terminal into the terminal hole.

[0014] In addition, the tabs are attached to the terminals that protrude into the jig holes, so the terminals in the jig holes will not fit. Because it is easy to bend, the terminal can be bent with little force; The impact applied to the terminal board during bending can be reduced, and cracks on the terminal board due to this impact can be reduced. No more defects such as cracks.

[0015] This will ensure that the terminals are securely fixed to the terminal board and will prevent the terminal board from breaking, cracking, etc. This eliminates defects in coil bobbins and improves the quality of coil bobbins. production has improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a coil bobbin of the present invention.

FIG. 2-A is an enlarged view of a main part showing the bending of the terminal in FIG. 1; FIG. 2-B is an enlarged view of the main part of the terminal shown in FIG. 1, which is folded.

[Explanation of symbols]

1 coil bobbin 2 bobbin 3 Terminal board 4 terminal 5 Jig

Claims (1)

[Scope of utility model registration request] Claim 1: A coil bobbin in which a bobbin made of thermoplastic plastic and a terminal plate are integrally molded, and a jig hole is provided on the side surface of the terminal plate, and the upper end of the terminal projects approximately perpendicularly to the lower surface of the jig hole. A hole is provided in the upper surface of the jig hole, and a step is provided on the upper surface of the jig hole, further back than on the axis of the terminal hole, with a step that is wide on the side and narrow on the back side, and a terminal provided with a tab portion is inserted into the terminal hole, and the jig is inserted into the jig. A coil bobbin characterized in that the terminal is inserted into a jig hole, the protruding part of the terminal is bent by a jig, and the tip of the terminal is pushed into the back of the jig hole while touching the upper surface of the jig hole.