JP2005033919A - Stepping motor coil bobbin and its winding producing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil bobbin in which disconnection is prevented by slacking a transition wire between a coil and a terminal without inserting a jig between the terminals. <P>SOLUTION: The coil bobbin for a stepping motor comprises a plurality of terminals 4, a resin molded spool 1 for the stator coil winding, and a groove 3 for inserting the plurality of terminals on one side of the spool 1. After the terminal is inserted to just in front of the bottom face of the groove 3 for terminal, the start-of-winding/end-of-winding of coil are wound around the terminal 4 and then the terminal is pushed deeper into the groove. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coil bobbin manufacturing method and a winding processing method for a stepping motor used in the field of information equipment and video equipment.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in order to prevent coil breakage at a motor coil terminal portion, a method of preventing looseness by applying slack to the winding start and winding end portions of a magnet wire wound around a coil has been implemented (for example, Patent Document 1). reference). FIG. 4 shows a conventional winding method described in Patent Document 1.
[0003]
According to FIG. 4, a comb-like projection 35 is placed on the side of the terminal pin 27 protruding from the coil bobbin 24 of the step motor, and the magnet wire 26 is entangled with the terminal pin 27. The protrusion 35 has a tip that does not protrude toward the body portion of the bobbin 24. In this state, the nozzles 32 and 33 are moved down to the position of the body and then lowered, and the spindle 31 to which the bobbin 24 is attached is rotated once. Then, the wire 26 is wound around the protrusion 35. Thereafter, the nozzles 32 and 33 are raised, and the spindle 31 is rotated to wind a coil. Then, the terminal 26 is entangled with the other terminal pin 28 in a state where the wire 26 is hooked on the protrusion 35 again. Then, each terminal pin is soldered and removed from the protrusion 35. As a result, slack is imparted to the winding start and winding end portions of the magnet wire wound around the coil to prevent disconnection.
[0004]
[Patent Document 1]
JP-A-4-239707 (page 5, FIG. 1)
[0005]
[Problems to be solved by the invention]
However, since the pitch between the terminals is reduced along with the demand for miniaturization of the motor, it has become difficult to take measures against disconnection by sagging the wire by inserting or removing a jig between the pitches.
[0006]
The present invention solves such a conventional problem, and an object of the present invention is to provide a winding method in which a wire is slackened even in a coil bobbin having a narrow pitch between terminals to prevent disconnection.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention inserts the terminal of the coil bobbin from the bottom of the terminal groove to the near side, winds the coil winding start and winding ends around the terminal, and then pushes the terminal into the terminal groove. This realizes slack in the line. This makes it possible to take measures against disconnection without inserting or removing the jig between the terminals.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In order to solve the above-mentioned problems, a stepping motor coil bobbin and a winding manufacturing method thereof according to claim 1 include a plurality of terminals, a winding frame formed by resin molding for stator coil winding, and a plurality of windings on one surface of the winding frame. In a stepping motor coil bobbin having a groove for inserting a terminal, the terminal is inserted from the bottom of the terminal groove to the front, and then the coil winding start and winding ends are wound around the terminal, and the terminal is further pushed into the terminal groove. Is.
[0009]
【Example】
An embodiment of the present invention will be described below with reference to the drawings.
[0010]
(Example 1)
Example 1 is a stepping motor coil bobbin and a winding manufacturing method thereof.
[0011]
FIG. 1 shows a coil bobbin before winding. The reel 1 is produced by a resin molded product. One side of the reel has a part 2 for holding the terminal. A terminal insertion groove 3 is formed in the terminal holding portion 2. The terminal 4 is inserted into this groove not to the bottom but to the near side. If necessary, the holding strength may be increased by bonding or welding the terminals.
[0012]
In FIG. 1, the terminal and groove shapes are both round (cylindrical), but they may be oval, rectangular parallelepiped or cube.
[0013]
Next, the winding process will be described.
[0014]
In FIG. 2, a coil bobbin is attached to the winding machine. First, the coil wire 5 that starts to be wound around the coil bobbin terminal 41 is wound around the coil bobbin terminal several times around the bald processing unit 51 and held. Subsequently, the winding machine is rotated to fill the coil bobbin winding frame with the coil wire 5. From the other coil bobbin terminal, the coil wire 5 at the end of winding is wound around the terminal and wound around the terminal several times in the same manner as at the beginning of winding. Thereafter, the terminals at the start of winding 41 and the end of winding 42 are pushed into the terminal groove depth direction in a state where the terminals are tangled.
[0015]
Thereby, the coil connecting wires 61 and 62 extending from the terminal to the bald portion shown in FIG. 2 can be changed to the coil connecting wires 63 and 64 having slack as shown in FIG.
[0016]
1, 2, and 3 show the case of two terminals, the same effect can be obtained by the same operation even when there are three or more terminals.
[0017]
【The invention's effect】
As apparent from Example 1 above, according to the first aspect of the present invention, the terminal is inserted from the bottom surface of the terminal groove to the front, and the coil winding start and winding end are wound around the terminal, respectively. By further pushing the terminal into the terminal groove, a sufficient slack can be provided, so that disconnection can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a coil bobbin according to a first embodiment of the present invention. FIG. 2 is a perspective view of a coil bobbin and a winding before re-pressing a terminal according to the first embodiment of the present invention. FIG. 4 is a perspective view of a coil bobbin and windings that have been pressed to give a slack.
DESCRIPTION OF SYMBOLS 1 Coil bobbin winding frame part 2 Terminal holding part formed in the coil bobbin end surface 3 Terminal insertion groove provided in the terminal holding part 4 Terminal 5, 26 Coil (magnet wire)
24 Coil bobbins 27 and 28 Terminal pins 31 projecting from the coil bobbin 31 Spindle 32 and 33 Nozzle 35 Comb-like projection 41 Coil winding start connection (for curling) terminal 42 Coil winding end connection (for curling) terminal 51 Coil winding start Terminal connection (bending) processing unit 52 End of coil winding terminal connection (bending) processing unit 61 Crossover wire at the beginning of coil winding before re-pressing the terminal 62 Crossover wire at the end of coil winding before re-pressing the terminal 63 After re-pressing the terminal Crossover 64 at the beginning of coil winding Crossover at the end of coil winding after re-pressing the terminal

Claims (1)

In a coil bobbin for a stepping motor having a plurality of terminals and a resin-molded winding frame for stator coil winding and a groove for inserting a plurality of terminals on one side of the winding frame, the terminals are arranged from the top surface to the bottom surface of the terminal groove. Stepping motor coil bobbin having a mechanism for inserting the terminal further into the terminal groove after inserting the coil winding start and winding ends onto the terminal, and a method of manufacturing the winding thereof.

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