JPH10256073A - Coil part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate connection and automation of work while enhancing the yield and reliability of product by winding the terminal wires of a coil around respective corner parts of a terminal board and soldering the winding part. SOLUTION: A terminal board 3 is provided with two projecting corner parts 35, 36 and the start-of-winding 21 and the end-of-winding 22 are wound (tied up) around respective corner parts and secured not to be loosened. Terminal patterns 31, 32 are led to the surface at respective corner parts. After ending the winding process, the corner part is clipped into molten solder in order to fuse the coating of the terminal wire and to solder the entangled parts rigidly each other and to the terminal patterns 31, 32. Preferably, no tension is present in the entangled terminal wire between the corner part and the coil body. For that purpose, intermediate part of the terminal wire is wound substantially along the surface of a coil part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for processing a terminal wire drawn from a coil in a coil component.

[0002]

2. Description of the Related Art For example, in a coil used for driving an analog type electronic timepiece step motor, etc., a processing technique for electrically and mechanically fixing a terminal wire at the beginning and end of winding to an external circuit. In the past, various attempts have been made. Typical technologies that have been widely used in the past are:
The terminal wire of the coil wound so that the outer shape becomes substantially cylindrical is drawn out from one end of the cylinder in the axial direction, and a small terminal board is fixed to the end of the coil core or the bobbin,
A structure and a method of connecting terminal lines to a plurality of patterns on the substrate in a point manner have been adopted. The related art will be described below with reference to the drawings.

FIG. 3 is a perspective view of a step motor used in an analog (pointer type) electronic timepiece, which has been subjected to coil terminal processing by applying the prior art. The description of the prior art and the application of the prior art or the present invention are shown in FIG. FIG. 2 is also a diagram for explaining a step motor to be performed. Reference numeral 1 denotes a winding core, which is a magnetic core (iron core) made of a plate material having high magnetic permeability, and has lug-like enlarged portions 11 and 12 at both ends.
Having. Reference numeral 2 denotes a coil, which is wound several thousand times in multiple layers around a thin portion of the core 1 and has an almost cylindrical outer shape.
The coil 2, which is a winding part, includes a winding core, a winding frame, and other members substantially integrated with the coil, and is referred to as a coil component. Reference numeral 3 denotes a terminal substrate, which is made of, for example, an epoxy resin containing glass fiber and is fixed to the upper surface of the enlarged portion 11 of the core. On the surface thereof, there are provided two terminal patterns 31 and 32 which are copper foils. On these patterns, a coil start terminal wire 21 and a coil end terminal wire 22 are provided.
Are soldered by the solders 33 and 34.
(In other conventional techniques, each terminal wire of the coil is thermocompression bonded to each one of the terminal patterns, and the thermocompression bonding portion is protected by applying a resin droplet.)

[0004] Reference numeral 4 denotes a two-pole stator plate, in which two high-permeability plates are integrally joined via non-magnetic materials 41 and 42, and screws 6 are attached to both ends of the core 1 of the coil. , 7 to form a stator magnetic circuit. The rotor 5 is pivotally supported in the hole 43 of the stator.
The main body of the rotor 5 is a disk-shaped permanent magnet having magnetic poles formed in the diameter direction, and the shape of the hole 43 of the stator is provided so that the magnetic poles are oriented in a predetermined direction in a stationary state. Rotor 5
Has a pinion gear 51 for taking out a rotational output. When a pulse-like voltage whose direction changes alternately is applied to the terminal of the coil in the step motor having such a configuration,
The rotor rotates in a fixed direction by 180 ° each time. A drive circuit for applying a drive voltage to the coil 2 is provided on a terminal board (not shown), and two drive terminals are provided on the back surface thereof. When it is tightened, the drive terminal pattern and the terminal patterns 31 and 32 are brought into pressure contact with each other to conduct.

In this prior art, since the terminal wires 21 and 22 before connection are flexible, cantilevered and unstable, accurate positioning is difficult, and a small area is used so as not to apply tension to a thin and weak wire. The main reason is that it is necessary to accurately target and connect the terminal patterns 31 and 32 of the above. The increase in the number of steps in the connection work, the decrease in the yield due to disconnection, poor connection, etc. are unavoidable, and the automation of the work is inevitable. There was a drawback that it was difficult and the cost was high.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide a coil which can be easily and reliably connected, has high yield and high product reliability, and can be easily automated. It is to provide a new processing technology for terminal lines.

[0007]

SUMMARY OF THE INVENTION In a multi-layer and multi-turn wound coil whose outer shape is substantially cylindrical, each end wire at the beginning and end of the winding is substantially aligned with the axial direction of the coil from one side of the cylinder. Then, an insulating substrate having a plurality of corners is fixed to one end of the winding core or the winding frame of the coil, and the terminal wires are wound around each of the corners, and then the terminal wires are wound. A coil part characterized by fixing each of the parts by soldering.

[0008]

FIG. 1 is a perspective view of a coil component according to a first embodiment of the present invention. Since the coil component to which the present invention is applied basically enables replacement with the coil component in the conventional step motor as shown in FIG. 3, only the coil component is shown in the first embodiment of the present invention. The explanation is enough. Note that parts corresponding to those of the related art have the same part names and numbers, and descriptions thereof will be omitted.

In FIG. 1, a different point from the conventional example of FIG. 3 is a terminal line processing method. The terminal board 3 is provided with two protruding corners (stubs) 35 and 36, and the winding start terminal wire 21 and the winding end terminal wire 22 are wound several times to several tens of times at each corner. It is attached (kind) and fixed so as not to loosen. The terminal patterns 31 and 32 are each led to the surface of the corner. When the corners are dipped in the molten solder after the winding process is completed, the coating of the terminal wire is melted, and the flared portion is firmly soldered to itself and the terminal patterns 31, 32.

[0010] To describe in more detail, first of all, the terminal wire 2
1 is wound around the corner 35, and then the winding of the coil 2, which is the main body portion, is performed directly on the thin portion of the winding core 1 (the surface of which has been subjected to insulation coating treatment). 22
Is wound around the corner 36. In the meantime, the core 1
The three types of winding are continuously performed in a consistent process by moving the guide of the winding while the chuck is held by a winding machine (not shown).

Further, it is not preferable that the terminal wire having been tangled has tension between the corner and the coil body. To avoid this, use an appropriate holding tool to wind or wind the middle part of the terminal wire almost along the surface of the coil component, and then retract the tool after the work is completed, it is necessary for the middle part of the terminal wire Can give sagging.

FIG. 2 is a perspective view of a bobbin used for a coil component according to a second embodiment of the present invention. The coil body, terminal wire, and core are not shown. In the second embodiment, the winding of the coil 2 of the main body is performed not on the winding core but directly on the winding frame 8, and after completion of the winding, the winding core (for example, several thin plates each having an enlarged portion at one end are stacked). May be inserted into the center hole 81. The winding frame 8 has flanges 83 and 8
4 The terminal board 82 is almost occupied by the corners 85 and 86. These are formed integrally during the injection molding of the core 8.

The winding process is substantially the same as in the first embodiment. That is, the winding start terminal wire is first wound around the corner 85 and then goes through the groove 87 to the inside of the flanges 83 and 84 to finish the winding of the coil main body. Wrapped around. Although the terminal board 82 does not have a terminal pattern, when the corners 85 and 86 are solder-dipped, they themselves become terminals for external connection. That is, the terminal pattern is not an absolutely necessary requirement.

In the embodiments of the present invention, various modifications can be made within the scope of the present invention. For example, a terminal board having one corner portion is provided at each end of the coil, and each terminal wire is divided into both ends of the coil, and the corner portion is bent, and the thickness is not uniform. The projecting direction is not necessarily the axial direction of the coil, the projecting directions of the plurality of corners are made different, the cross-sectional shape of the corners is changed, for example, to give a shape easy to entangle the terminal wire, the configuration of the terminal board, To make changes, for example, to provide a corner portion on the enlarged part of the core made of alloy, provide an insulating layer on the surface and wind the terminal wire thereon, and also use the terminal board as another board or component Arbitrarily select the winding direction of the terminal wire around each corner, solder the terminal wire on the corner, not by solder dip, solder paste while the coil part is hung on the winding machine May be supplied to the corners,
Further, it is possible to perform solder melting by local heating or the like using hot air or a laser beam, and the application of the coil component is not limited to a step motor.

[0015]

According to the present invention, since the terminal wires of the coil are wound around the corners of the terminal board and the wound portions are fixed by soldering, the following effects are obtained. (1) Since both terminal wires of the coil are positioned and firmly fixed by the corners, the terminal wire processing operation is extremely reliable and easy. (2) Since the winding operation of the wire around the corner can be performed continuously before and after the winding operation of the coil body as a process consistent with it, for example, by one machine, the operation can be easily automated, In addition, equipment costs can be reduced. (3) As a result, improvement in yield and reduction in cost in the manufacturing process of the coil component are achieved. (4) The reliability of the coil component is also improved due to the reliability of the connection.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a perspective view of a bobbin used in a second embodiment of the present invention.

FIG. 3 is a perspective view of a step motor to which the related art is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding core 11, 12 Enlarged part 2 Coil 21 End of winding end line 22 End of winding end line 3 Terminal board 31, 32 Terminal pattern 33, 34 Solder 35, 36 Corner 4 Stator plate 41, 42 Non-magnetic material 43 Stator Hole 5 Rotor 51 Pinion gear 6, 7 Screw 8 Winding frame 81 Center hole 82 Terminal board 83, 84 Collar 85, 86 Corner 87, 88 Groove

Claims (4)

[Claims] 1. A coil wound in a multi-layer and multiple turns so as to have a substantially cylindrical outer shape, and each end wire at the beginning and end of winding is drawn out from a side end of the cylinder, and the core or the winding of the coil is wound. At least one insulative substrate having a corner is fixed to an end of the frame, and one of the terminal wires is attached to one of the corners.
A coil component, wherein after winding one of the two ends, each of the wound portions of the terminal wire is fixed with solder. 2. An insulation having a plurality of corner portions at one end of a winding core or a winding frame of the coil, wherein each end wire of the winding start and the winding end is pulled out substantially from one side of the cylinder in the axial direction of the coil. The fixed substrate is fixed, and each of the terminal wires is wound around each of the corners, and then the wound portions of the terminal wires are fixed with solder, respectively. Coil parts. 3. The coil component according to claim 1, wherein each of the plurality of corners of the substrate is substantially parallel to an axis of the coil and faces the outside of the coil. 4. The substrate surface has a conductive pattern reaching each of the corners, and each of the terminal lines is wound around the corner so as to cover at least a part of the conductive pattern, and is connected to the conductive pattern. The coil component according to claim 1, wherein the coil component is soldered.