JP3800838B2 - Stepping motor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stepping motor mainly used for information-related equipment, and more particularly to a terminal structure thereof.
[0002]
[Prior art]
In recent years, stepping motors with higher reliability have been demanded for information-related equipment.
[0003]
The structure of a stepping motor (hereinafter referred to as a motor) in the field to which the present invention is applied is shown in FIG. In FIG. 2, a magnet wire 3 is wound around the stator core 1 via an insulator 2. A terminal block 14 for connecting the terminal line is press-fitted and held at one end of the insulator 2 in the axial direction.
[0004]
Conventionally, the structure of the portion connecting the end of the magnet wire to the terminal block has been configured as shown in FIG. In FIG. 3, the terminal block 14 arranged in the vicinity of the insulator 2 has terminal pins 15 to 17, and the termination lines 20 to 23 passing through the recesses 18 and 19 are respectively connected to the terminal pins 15 to 17. Connected and soldered.
[0005]
[Problems to be solved by the invention]
However, in this configuration, for example, the termination lines 20 and 21 coming out of the recess 18 reach the terminal pins 15 and 16 as they are and are soldered. Therefore, when the insulating film of the termination lines 20 and 21 is soldered near the recess 18 In some cases, it melts due to heat and causes poor insulation (called rare short). Further, when the distance between the recess 18 and the terminal pin is far from the wire diameter or external force, the terminal wire may be fatigued due to vibration.
[0006]
It is an object of the present invention to provide an excellent stepping motor having good quality and high reliability by preventing such insulation failure and preventing termination line breakage.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a terminal block with a distribution protrusion in the vicinity of the terminal pin so that at least a part of the plurality of terminal lines reach the terminal pin via the distribution protrusion. .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0009]
FIG. 1 is a structural plan view of a portion of a stepping motor according to the present invention for connecting a terminal end of a magnet wire to a terminal block. In FIG. 1, the terminal block 24 arranged in the vicinity of the insulator 2 has terminal pins 15 to 17, and further, there is a sorting protrusion 25 in the vicinity of the terminal pin 15. Similarly, there is a sorting protrusion 26 in the vicinity of the terminal pin 17.
[0010]
Here, the two termination lines 30 and 31 exiting the recess 18 are adjacent in the vicinity of the recess 18. Of these, the terminal line 30 reaches the terminal pin 15 as it is, and the terminal line 31 reaches the terminal pin 16 via the sorting protrusion 25. Similarly, the two termination lines 32 and 33 exiting the recess 19 are adjacent in the vicinity of the recess 19, but the termination line 33 reaches the terminal pin 17 as it is, and the termination line 32 is connected to the terminal via the distribution protrusion 26. Pin 16 is reached.
[0011]
Each terminal line is tangled to each terminal pin and soldered. At this time, since two terminal wires are connected to the terminal pin 16, it is necessary to increase the amount of solder attached to other terminal pins, and the terminal pin 16 and the terminal wires 31 and 32 connected thereto are in a high temperature state. Tend to last for a long time.
[0012]
The distribution projections 25 and 26 of the present invention function as described below to improve the quality and reliability of the motor. That is,
First, a barrier is formed between the soldered portion of the terminal pin 16 and the proximity portion of the termination line. This prevents the radiant heat of the soldering part and the soldering apparatus from being transmitted to the proximity part of the termination line, and prevents the temperature rise of the termination line proximity part and prevents a short circuit between them.
[0013]
Second, the distance between the soldering portion and the proximity portion of the termination line is increased. This helps to dissipate the heat that travels through the termination line and prevents a temperature rise in the vicinity of the termination line and prevents a short circuit between them.
[0014]
Third, heat is absorbed between the soldering portion and the proximity portion of the termination line. By transmitting the heat of the termination line to the distribution projection at the portion where the termination line contacts the distribution projection, the temperature rise in the vicinity of the termination line is prevented, thereby preventing a short circuit from occurring.
[0015]
Fourth, it supports between the soldering part and the proximity part of the termination line. As a result, the vibration of the terminal line is attenuated, and fatigue failure of the terminal line due to vibration is prevented.
[0016]
Note that the present invention is not limited to the above-described embodiment, and various application developments are possible within the scope of the gist of the present invention.
[0017]
【The invention's effect】
As is clear from the above description, according to the present invention, the terminal block is provided with the distribution protrusion in the vicinity of the terminal pin, and at least a part of the plurality of terminal lines reaches the terminal pin via the distribution protrusion. Therefore, it is possible to prevent the termination line from being short-circuited in the proximity portion and improve the quality. Further, the fatigue resistance of the terminal line is prevented and the vibration resistance is improved. As a result, it is possible to provide an excellent stepping motor having good quality and high reliability.
[Brief description of the drawings]
FIG. 1 is a structural diagram of a portion connecting a terminal end of a magnet wire of the present invention to a terminal block. FIG. 2 is an overall structural diagram of a stepping motor in a field to which the present invention is applied. Structural diagram of the part connected to the terminal block [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stator core 2 Insulator 3 Magnet wire 4 Cover 5 Flange 6 Rotor core 7 Magnet 8 Shaft 9 Bearing boss 10 Bearing 11 Thrust washer 12 Preload spring 13 End cover 14, 24 Terminal blocks 15, 16, 17 Terminal pins 18, 19 Recesses 25, 26 Sorting protrusion 20, 21, 22, 23, 30, 31, 32, 33 Termination line

Claims (1)

A stator core having a plurality of salient poles arranged perpendicular to the rotation axis, an insulator attached to surround the salient poles, a plurality of magnet wires wound around the salient poles and having a termination line, and the insulator A terminal block that is press-fitted and held near the end in the axial direction and connects the termination line, and a recess that allows the termination line to pass therethrough or in the vicinity of the terminal block. The terminal block includes a terminal pin, the recess, and A stepping motor having a sorting protrusion in the vicinity of the terminal pin, wherein at least a part of the plurality of terminal lines passing through the recess reaches the terminal pin via the sorting protrusion.

Images