JP2533878Y2 - Board mounted coil - Google Patents

Description

[Detailed description of the invention] a. Object of the Invention [Industrial application field] The present invention relates to a coil mounted on an electronic device, and relates to a pin terminal structure of a substrate mounting coil using a tubular pin terminal.

[Conventional technology]

FIG. 4 shows an example of a conventional board-mounted coil using a tubular pin terminal. A coil main body 1 in which an annular magnetic core having a high relative magnetic permeability characteristic is housed in a core insulating case 2 provided with a protruding piece 3 on an outer peripheral surface and is provided with a winding 4 (simplified by a thin line), and a tubular pin The terminal block 5 having the terminal 6 penetrated vertically and protruding from the bottom surface by a required length is inserted.
, The ends of the windings 4 are inserted into the center holes of the pin terminals 6 and combined, and the projections of the pin terminals 6 are soldered by dipping in a solder bath or the like. And the pin terminal 6 were connected.

[Problems to be solved by the invention]

The conventional tubular pin terminal 6 is a tapered (tapered) tube material, and is inserted by being press-fitted into a through hole of the insulating resin terminal block 5. A terminal block 5 on the outer periphery of the thin straight pipe material
Since it is difficult to form a deformed portion which engages with the wall surface of the through hole, a pin terminal made of a straight pipe is not used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pin terminal of a straight pipe material that can be inserted into a terminal block of a board-mounted coil.

B. Configuration of the Invention [Means for Solving the Problems] The present invention is based on a method in which a notch having a required length in the axial direction of the pin terminal and a pipe wall corresponding to the notch are provided at an upper end portion of the tubular pin terminal. A substrate-mounted coil using a tubular pin terminal made of a straight pipe material having a projection protruding from an outer peripheral surface.

That is, the present invention comprises: 1. a coil body having a magnetic core wound thereon, and a terminal block into which a plurality of tubular pin terminals are inserted. The coil body is installed on the terminal block, In a substrate-mounted coil having an end portion inserted and connected to the tubular pin terminal, the pin terminal is a straight pipe material, and a notch at an upper end portion,
A substrate-mounted coil having a projection protruding from an outer peripheral surface of a tube on a tube wall corresponding to the notch.

2. The substrate mounting type according to claim 1, wherein the tubular pin terminal is inserted with a top end protruding from the terminal block for a required length with the opening of the notch in the same direction. Coil.

[Action]

The notch of the pin terminal has a role as a passage of a jig for forming a projection, and a role to widen an entrance for inserting an end of a winding into a tube of the pin terminal, and the projection is a wall surface of a through hole of a terminal block. The pin terminal is slidably pressed into the terminal block and engaged with the wall surface to fix the pin terminal to the terminal block.

〔Example〕

FIG. 1 shows an embodiment of a board-mounted coil according to the present invention before the coil body 7 and the terminal block 8 are combined. In FIG. 1, a coil body 7 is a common mode choke coil in which an annular magnetic core is housed in a core insulating case 2 having a center partition plate and a partition plate, and two windings 9 of a thick winding material are separated and wound. It is. The coil body 7 is placed vertically so that the outer peripheral surface corresponding to the support base 10 faces down, and the end of the winding 9 is pulled out downward. The ends of the windings 9 are long enough to protrude from the lower ends of the pin terminals 11, and are short in order of a certain length, for example, the end on the right front is longest and short clockwise. Therefore, the right end is adjusted to be the shortest.

The terminal block 8 has a bar-shaped support 10 protruding from the center, and the upper surface of the support 10 is an arc surface that matches the outer peripheral surface of the core insulating case 2.

The tubular pin terminal 11 inserted in the terminal block 8 with the upper end surface flush is a straight pipe material. At the upper end of the tubular pin terminal 11 (hereinafter referred to as a pin terminal), a notch 12 is formed in the axial direction of the pin terminal so as to have a length smaller than the thickness T of the terminal block 8, for example, over approximately half the thickness. Is formed. Furthermore, pin terminals 11
2, a projection 13 projecting from the outer surface of the tube is formed on the tube wall corresponding to the notch 12, as shown in an enlarged perspective view in FIG.

The protrusion 13 is formed by inserting a jig from the notch 12 and pressing the tube wall, etc., and has a shape gradually projecting outward, that is, radially toward the upper end of the pin terminal 11. In the figure, the shape is a triangular pyramid. When the pin terminal 11 is pressed into the through hole of the terminal block 8 from above, the projection 13 slides into contact with the inner wall of the through hole for the pin terminal 11 of the terminal block 8 and enters halfway through the through hole to resiliently engage with the inner wall. The shape of the projection 13 is
Any shape may be used as long as it can be engaged with the inner wall of the through-hole to prevent upward removal.

The combination of the coil body 7 and the terminal block 8 is inserted by inserting the ends of the windings 9 into the tube of the pin terminals 11 in order from the long side until the outer peripheral surface of the insulating case 2 comes into contact with the support base 10. This is performed by soldering the protruding portion (lower end) of the pin terminal 11. The entrance for inserting the end of the winding 9 of the pin terminal 11 is widened by the notch 12, so that the work of inserting the end of the winding 9 is easier than before.

FIG. 3 shows a terminal block 8 in which the pin terminals 11 shown in FIG. 2 are inserted in different states. In FIG. 1, the upper end surface is flush with the terminal block 8 and the direction of the opening of the notch 12 is arbitrary, while the direction of the opening of the notch 12 is aligned and The upper end of 11 protrudes slightly from the upper surface of the terminal block 8.

In the case of the terminal block 8 shown in FIG. 3, the coil body 7 in FIG. 1 is held at a height at which only the longest end of the winding 9 can contact the pin terminal 11, and the notch 12 After approaching from one side, the first end of the winding 9 abuts against the inner wall of the pin terminal 11, and then the coil body 7 is lowered to such a height that only the second longest end of the winding 9 can abut. And the first end is a pin terminal
Insert into 11 tubes. After the second end is brought into contact with the inner wall of the pin terminal 11 from the side with the notch 12, the coil body 7 is lowered again so that the third end can be slightly brought into contact with the second end. Part is inserted into the tube of the pin terminal 11. By repeating the same procedure to obtain the pin terminal structure shown in FIG. 3, the four ends of the winding 9 can be smoothly inserted into the pin terminals 11.

In the case of the terminal block 8 shown in FIG. 3, the terminal block 8 may be combined with a coil body having almost the same length as the end of the winding 9,
It is easier than before. Conventionally, it has to be positioned in a hollow and inserted all at once.On the other hand, even if it is difficult to draw the ends with a thick winding material, all the end And can be inserted all at once.

C. Effect of the invention [Effect of the invention] According to the invention, a straight pipe material that is cheaper than a tapered pipe material is used.
The work of assembling the coil body and terminal block is easier than before.Especially, in the case of a terminal block in which the upper end is protruded and the pin terminals are inserted with the openings of the notches aligned, applying an automated device Since the working efficiency can be improved, there is an effect that the manufacturing cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a board-mounted coil according to the present invention. FIG. 2 is an enlarged perspective view showing one embodiment of a tubular pin terminal used in the present invention. FIG. 3 is an external perspective view showing another example of the terminal block according to the present invention. FIG. 4 is an exploded perspective view showing a conventional example. 1,7 ... Coil body, 2 ... Core insulation case, 3 ... Protrusion, 4,9 ... Winding, 5,8 ... Terminal block, 6,11 ... (Tube)
Pin terminal, 10 ... Support base, 12 ... Notch, 13 ... Protrusion.

Claims (2)

(57) [Scope of request for utility model registration] 1. A coil body having a core wound with a coil, and a terminal block having a plurality of tubular pin terminals inserted therein. The coil body is mounted on the terminal block, and an end of the coil is provided. Wherein the pin terminal is a straight pipe material, the notch is formed at the upper end portion, and the pin terminal protrudes from the outer peripheral surface of the tube to the tube wall corresponding to the notch. A substrate-mounted coil having a projection that is formed. 2. The substrate according to claim 1, wherein said tubular pin terminal is inserted with a top end protruding from said terminal block by a required length with an opening of said notch in the same direction. Wearable coil.