JP4584040B2 - Coil terminal - Google Patents

Description

  The present invention relates to a coil terminal for connecting a lead wire of a coil.

  Conventionally, when connecting a lead wire of a coil to a terminal, the lead wire is generally tangled to the terminal and soldered as disclosed in Japanese Patent Laid-Open No. 6-283361.

The processing of the lead wire of the toroidal coil is usually performed in the same manner.
JP-A-6-283361

  Conventionally, when connecting a lead wire to a terminal, it has a man-hour for binding.

  In addition, a thick round wire is used as a wire in a coil that is energized with a large current. Since such a thick wire is stiff, it is difficult to bind the wires. Furthermore, in the multi-winding toroidal coil, there are many problems in that the lead wires of the respective internal windings are entangled, so that it takes a lot of time and effort and the workability is poor.

  The present invention has been proposed in view of the above, and the object of the present invention is to eliminate the need for tangling, and to easily and quickly connect the lead wire of the coil, and particularly the surface of the toroidal coil. An object of the present invention is to provide a coil terminal suitable for use as a mounting terminal.

According to the first aspect of the present invention, in the terminal to which the lead wire of the coil is connected, the terminal is formed with a plurality of slits for accommodating the lead wire and is attached to the case, and the outer end portion of the upper plate A side plate formed by bending downward, and a strip-like cut-and-raised piece is formed on the side plate portion, extending outward at the outer end of the slit, and bendable. It is characterized in that it is bent into a substantially L shape to form a surface mounting terminal .
According to a second aspect of the present invention, in the coil terminal according to the first aspect, a protrusion that can be bent toward the slit is formed at one end of the upper plate .
According to a third aspect of the present invention, in the terminal to which the lead wire of the coil is connected, the terminal has an upper plate formed with a plurality of slits for accommodating the lead wire and attached to the case. A side plate extending downward at the outer end is connected, and a lower center portion of the side plate is cut and raised toward the inside to form a lower plate, and both end portions of the side plate extending downward are used as terminal portions, This terminal portion is characterized by being a discrete terminal or a surface mounting terminal by bending it into a substantially L shape .
The invention of claim 4, wherein, in the coil terminal according to claim 3, one end portion of the upper plate, characterized in that the formation of the bent capable protrusion toward the slit side.

According to the first aspect of the present invention, a plurality of slits are formed in the lead wire connecting portion, and the lead wires are wired and connected in the slit. This man-hour is not required, and the connection workability is greatly improved. For this reason, even if the lead wire is a multi-winding internal winding of a toroidal coil, it can be easily connected simultaneously. Further, there is an effect that the cut and raised piece for forming the slit can be used as a terminal for surface mounting.
According to the second aspect of the present invention, the projecting portion can be bent, and before the bending, it does not interfere with the lead wire connection, and the lead wire can be reliably connected and fixed by bending after the connection. Therefore, when the terminal is soldered to the substrate, it is possible to prevent the leader line in the slit from coming off due to the heat.
According to the third aspect of the present invention, the side plate cut and raised and bent is used as the lower plate, and can be used together with the upper plate for attachment to the mounting portion, and both sides of the side plate can be used for discrete terminals or surface mounting. There is an effect that it can be selectively used as a service terminal and has versatility.
According to a fourth aspect of the present invention, in the coil terminal according to the third aspect, the protruding portion can be bent, and before the bending, it does not interfere with the lead wire connection, and is bent after the connection, thereby leading the lead wire. Therefore, when the terminal is soldered to the substrate, it is possible to prevent the lead wire in the slit from being detached due to the heat .

  Embodiments of the present invention will be described below with reference to the drawings.

Reference example 1

FIG. 1 is a perspective view of a surface mounting terminal according to Reference Example 1 which is a premise of the present invention.
The surface mounting terminal 1 is made of a conductive material, and includes an upper plate 2 having a substantially horizontally long rectangle, a lower plate 3 spaced from the upper plate 2 and opposed to the lower side, and an outer side of the upper plate 2 and the lower plate 3. It has a side plate 4 that connects the end portions, and is substantially U-shaped when viewed from the side. The upper plate 2 and the lower plate 3 have spring properties due to their materials, and a pedestal, terminal block, terminal plate or the like (not shown) can be press-fitted between the upper plate 2 and the lower plate 3 for easy Can be attached to.

  Note that the attachment to the pedestal or the like is not limited to press fitting, and may be embedded or retrofitted.

  The upper plate 2 is formed with a plurality of slits 2a at appropriate intervals in a comb shape. The slit 2 a is formed from the inner end of the upper plate 2 to the upper portion of the side plate 4 on the outer end side of the upper plate 2. Although three slits 2a are formed in the illustrated example, the number of slits 2a is not necessarily limited to the number and can be increased or decreased as appropriate.

  The thickness a of the upper plate 2 is preferably substantially the same as the thickness of the lead wire or the lead wire when the lead wire is a flat wire, and the lead wire is preferably accommodated in the slit 2a. When the electric wire for energizing a large current is a round wire, the diameter is large and thick, and when it is a flat wire, there is a thickness. It is preferable that the thickness a of the upper plate 2 is substantially the same as that because the thickness or thickness can be absorbed. Of course, it is not necessarily the same as the diameter or thickness of the leader line.

  A plate-like protrusion 2b extending in the length direction of the upper plate 2 is formed at one end of the upper plate 2 so as to be bendable. The length b of the protrusion 2b is preferably substantially the same as the length c of the upper plate 2.

  FIG. 2A shows a state in which a coil lead wire 5 is connected to the slit 2a of the terminal 1 for surface mounting. The lead wire 5 is stored and connected from the inner end side to the outer end side in the slit 2a. In the present invention, it is easy to connect to the same terminal 1 at the same time even if it is an internal winding of a multi-winding toroidal coil. Then, although not particularly illustrated, the whole is soldered or welded after being temporarily fixed by bending, and as shown by the arrows, the state is bent toward the upper surface side of the upper plate 2 and maintained.

  FIG. 2B shows a perspective view thereof. After doing so, the upper plate 2 and the protrusion 2b may be soldered or welded.

  When the protrusion 2b is not on the upper plate 2, a metal cover 6 as shown in FIG. 3 may be used. The metal cover 6 is a long and substantially plate-like metal cover main body 6a having a length substantially the same as the length of the upper plate 2, and side pieces 6b bent downward at both ends thereof. At the time of attachment, the metal cover 6 may be disposed so as to face the upper plate 2, be lowered as indicated by an arrow A, and be covered on the upper plate 2. Alternatively, it may be arranged outside the upper plate 2, slide as shown by arrow B, attached to the upper plate 2, soldered or welded.

  When the surface mounting terminal 1 is soldered to a substrate (not shown), the solder at the welded portion of the lead wire 5 may be simultaneously melted and removed by the heat.

  However, by providing the protrusion 2b or the metal cover 6, it is possible to prevent the lead wire connecting portion from coming off due to soldering and melting due to the heat.

Reference example 2

FIG. 4 is a reference example 2 of the present invention, and shows the terminal 1 when the protrusion 2b shown in FIGS. 1 and 2 is not provided. Since the slit 2 a is formed from the inner end of the upper plate 2 to the upper portion of the side plate 4, the lead wire 5 is guided along the slit 2 a with the slit 2 a as a guide, and its tip is bent to the side plate 4 side. Soldering or welding may be performed on the top or side. In the case of welding, when the surface mounting terminal 1 ′ is soldered to the substrate, it does not come off due to the heat.

FIG. 5 shows an application example. FIG. 5 shows a state in which the surface mounting terminal 1 of Reference Example 1 is press-fitted into the terminal block 8 on which the toroidal coil 7 is mounted, and the lead wire 5 is housed and connected to the slit 2a. After connecting the leader line, the protrusion 2b is bent as shown in FIG. 5 shows only two slits 2a for the sake of illustration, an appropriate number is provided as described above.

FIG. 6 shows another application example. FIG. 6 shows a state where the surface mounting terminal 1 ′ of Reference Example 2 is press-fitted into the thick terminal portion 9 b of the flange 9 a of the coil bobbin 9. That is, FIG. 6 shows the outer periphery of the hollow winding body portion of the coil bobbin 9, in which a coil 10 is wound between flanges 9a and 9c formed at both ends, and a so-called RM type core 11 is incorporated. Or an inductor is shown. As shown in FIG. 4, the lead wire 5 of the coil 10 is accommodated and connected to the slit 2a of the surface mounting terminal 1 ′. Two slits 2a are shown for convenience of illustration. Needless to say, the core 11 may be of the EE type.

FIG. 7 shows a surface mounting terminal according to the first embodiment of the present invention. FIG. 7 shows an example in which a surface mounting terminal 13 is attached to one side wall 12b of a box-shaped case 12 having an opening 12a. The surface mounting terminal 13 includes an upper plate 14 and a side plate 15 whose outer end portion is bent downward in the illustrated state. The upper plate 14 is placed on the upper surface 12b ′ of the case side wall 12b in the illustrated state. A lower portion of the side plate 15 is slightly bent inward, and a fixing portion 15a for fixing to the outer surface of the side wall 12b of the case 12 is formed. The fixing portion 15a may not be provided.

  The upper plate 14 is formed with a plurality of slits 14a in a comb shape at appropriate intervals. When the slit 14a is formed, the cut-and-raised piece 14b extends outward, and the lead wire 5 of the toroidal coil 7 accommodated in the case 12 is turned to the slit 14a side as shown by an arrow in FIG. As shown in (b), after being housed in the slit 14a, welded or soldered, the protruding portion 14c formed on the upper plate 14 is bent to the slit 14a side, and then the cut and raised piece 14b is substantially L-shaped. If bent, a surface mounting terminal 14b 'can be obtained.

  As shown in FIG. 7A, a similar surface mounting terminal 13 is provided on the other side wall 12c facing the one side wall 12b of the case 12.

  The case 12 in which the toroidal coil 7 is accommodated is filled with a resin (not shown) such as an epoxy resin from the viewpoint of moisture resistance, insulation, etc., the toroidal coil 7 is sealed, and a transformer or an inductor is provided. Composed.

  FIG.7 (c) shows the case where it attaches to a board | substrate.

FIG. 8 shows a second embodiment of the present invention. This embodiment is characterized in that a terminal can be selectively used as a discrete terminal or a surface mounting terminal as required.

  The basic structure of the terminal is substantially the same as that of the second embodiment shown in FIG. 7 except that there is no fixing portion 15a and the side plate 15 is formed long in the downward direction. Are indicated by the same symbols.

  FIG. 8A shows an example in which a part of the side plate 15 is a discrete terminal portion 15c.

That is, the lower central portion of the side plate 15 is cut and raised inward, and the portions extending linearly downward on both sides of the cut and raised piece 15b having a substantially rectangular shape are used as discrete terminal portions 15c. The cut and raised pieces 15b can be used as the lower plate 3 of the reference example 1 shown in FIG.

  In FIG. 8B, the tip of the terminal portion 15c is bent outward to form a terminal portion 15c 'for surface mounting.

  In FIG. 8C, the tip portion is bent inward to form a terminal 15c 'for surface mounting.

The perspective view of the terminal for coils concerning the reference example 1 used as the premise of this invention is shown. (A), (b) shows use condition explanatory drawing. The perspective view of the metal cover used for a reference example is shown. The perspective view of the terminal for coils concerning the reference example 2 is shown. It is an application example of a reference example , and shows an example of attachment to a pedestal on which a toroidal coil is mounted. Another application example of the reference example , which shows an example of mounting a transformer or inductor incorporating a so-called RM core to a flange terminal portion. (A)-(c) shows the application example of the terminal for coils concerning the 1st example of the present invention. (A)-(c) shows each usage example of the terminal for coils concerning the 2nd example of the present invention.

DESCRIPTION OF SYMBOLS 1, 1 'Surface mounting terminal 2 Upper board 2a Slit 2b Protrusion part 3 Lower board 4 Side board 5 Leader 6 Metal cover 6a Metal cover main body 6b Side piece 7 Toroidal coil 8 Base 9 Coil bobbin 9a Flange 9b Terminal part 9c Flange 10 Coil 11 RM core 12 Case 12a Opening 12b, 12c Side wall 12b 'Upper surface 13 of side wall 12b 14 Terminal 14 Upper plate 14a Slit 14b Cut and raised piece 14b' Surface mounting terminal 14c Projection 15 Side plate 15a Fixing portion 15b Cut and raised piece 15c Terminal Part 15c 'surface mounting terminal part

Claims (4)

At the terminal to which the coil leader is connected,
The terminal is provided with an upper plate formed with a plurality of slits for accommodating the lead lines and attached to the case, and a side plate formed by bending the outer end of the upper plate downward.
A band-shaped cut-and-raised piece which is the side plate portion and extends outward at the outer end portion of the slit and which can be bent is formed, and this terminal portion is bent into a substantially L shape to form a surface mounting terminal. This is a coil terminal. 2. The coil terminal according to claim 1 , wherein a protrusion that can be bent toward the slit is formed at one end of the upper plate . In the terminal to which the lead wire of the coil is connected, this terminal has an upper plate formed with a plurality of slits for receiving the lead wire and attached to the case, and is directed downward at the outer end portion of the upper plate. An extending side plate is connected, and a lower center portion of the side plate is cut and raised inward to form a lower plate, and both end portions of the side plate extending downward are used as terminal portions, and the terminal portions are terminals for discrete use or A coil terminal which is bent into a substantially L shape to form a surface mounting terminal. In the coil terminal of claim 3, wherein one end portion of the upper plate, coil terminal, characterized in that the formation of the bent capable protrusion toward the slit side.

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