JPS6130419Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a stator for a small motor in which the arrangement of a coil holder and terminals attached to the coil holder is improved.

As a stator of a well-known small motor,
Some stator cores have coils wound around the magnetic poles of the stator core that are held by a coil holder in a shape that does not inhibit insertion and removal of the rotor. however,
Since the conventional holder locally held the coil, there was a risk of deformation in the portions not held by the holder. Further, the coil may come into contact with a corner of the coil holder, and there is a risk that the insulating coating of the contact portion may be peeled off, or the coil itself may be bent strongly and damaged.

By the way, in order to change the rotational speed of the motor by electrically switching the effective length of the coil in stages, in addition to the lead-out ends at both ends of the coil, one or more lead-out ends (intermediate Tap) may be connected. In such a case, it is necessary to provide the coil holder with three or more terminals to connect each of the above-mentioned lead-out ends, but if three or more terminals are arranged in parallel on a holder of limited size, each terminal There was a problem in that the spacing between the two became narrower, making it difficult to secure the required insulation distance.

This idea was made in consideration of the above-mentioned circumstances, and it is possible to prevent the coil from deforming as a whole and prevent the coil from being bent strongly. It is an object of the present invention to provide a stator for a small motor that can relatively easily ensure an insulating distance between each terminal without increasing the size of a holding body when three or more terminals are provided on the stator body.

That is, the stator of the small motor of this invention has a stator core 1 as shown in FIGS. 1 to 4.
a coil 3 wound around the magnetic pole 2 of the stator core 1; a coil holder 4 attached to the stator core 1 and holding the coil 3 in a fixed shape;
It is equipped with three (four or more terminals may be provided) terminals 9, 10, 11 attached to the outer surface 5 of the coil holder 4 and connected to the lead-out ends 6, 7, 8 of the coil 3, The coil holder 4 is formed with a convex curved contact portion 12 that contacts the coil 3, and the terminals 9, 1 are formed on the outer surface 5 of the contact portion 12.
0 and 11 are arranged at equal intervals along the convex curved surface. The stator core 1 is formed by stacking a large number of thin steel plates, and these thin steel plates are integrated by a pair of coil holders 4. Grooves for coil winding are formed in the stator core 1 on both sides of the magnetic poles 2, and an insulating sheet 13 is attached between the opposing grooves of both the magnetic poles 2, 2. The above insulation sheet 13
Both ends of the coil protrude beyond the stator core 1 to ensure insulation between the stator core 1 and the coil 3. Each coil holder 4 is a pair of coil holders 14 and 1 located at both ends of the magnetic pole 2.
4, a connecting portion 15 that connects both the holding portions 14, 14 and the stator core 1, and the insulating sheets 13, 13 extending along the end surface of the core 1 at each end of the connecting portion 15. It has extension portions 16, 16 that come into contact with the coil 3 from the opposite side. Further, as shown in FIGS. 2 and 4, grooves 17, 17 having substantially the same shape as the grooves on both sides of the magnetic pole 2 are formed at both ends of the extension portion 16,
The inner surface of each groove 17 is connected to the core 1 of the insulating sheet 13.
This is the contact surface for the protrusion from the top. Further, as shown in FIGS. 3 and 4, a contact portion 12 having a smooth convex curved surface is formed on the upper surface of each extension portion 16 between both grooves 17, 17. The portion 12 is brought into contact with the coil 3 from the inside between the grooves 17 on both sides of the magnetic pole 2. Further, the three terminals 9, 10, 11 are arranged on the outer surface 5 of the coil holder 4 so that the central terminal 10 is located above the other terminals 9, 11, as shown in FIG. It is attached. The lead-out ends 6 and 8 at both ends of the coil 3 are connected to terminals 9 and 1 on both sides.
1 and the lead-out ends (middle taps) 7 connected to the middle part of the coil 3 are connected to the central terminal 10.
It is connected to the.

As described above based on the embodiments, in the stator of the small motor of this invention, the contact portion 12 having a smooth convex curved surface is formed on the upper surface of the coil holder 4, and the contact portion 12 is connected to the core of the coil holder 4. Since the coil 3 is brought into contact with the inside of the coil 3 on both sides of the holder 4, the coil 3 is held over the entire circumference, and deformation can be prevented over the entire periphery. Since there are no corners in the contact portion 12, the coil 3 will not be damaged, such as the insulation coating of the coil 3 being peeled off or the coil 3 being bent strongly.

Further, each terminal 9, 10, 11 is arranged on the outer surface 5 of the coil holder 4 so that the central terminal 10 is located above the other terminals 9, 11 along the convex pole surface of the contact portion 12. Since the terminals 9, 10, 11 are arranged at intervals, the distance between the terminals 9, 10, 11 can be made wider than when the terminals 9, 10, 11 are arranged in a straight line. The insulation distance can be secured relatively easily.

Note that this invention is not limited to the embodiments described above. For example, as shown in FIG. 5, the coil holder 4 may be provided with a mounting hole 21 below the central terminal 10 for mounting a coil winder used when assembling the stealer. If you do this,
When winding the coil 3 around the magnetic pole 2, the relative positional relationship between the coil winder and the stator core 1 can be maintained constant, and the coil can be wound efficiently. Instead of 21, a fixing part such as a high frequency welder used for attaching the terminal to the coil holder 4 may be provided.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of this invention, in which Figure 1 is a perspective view of the main parts of the stator, Figure 2 is a plan view of the main parts, Figure 3 is a side view of the main parts, and Figure 4 is a side view of the main parts. The figure is a perspective view showing a part of the coil holder, and FIG. 5 is a front view showing a modification. DESCRIPTION OF SYMBOLS 1... Stator core, 2... Magnetic pole, 3... Coil, 4... Coil holder, 5... Outer surface, 6,
7, 8... Leading end, 9, 10, 11... Terminal, 1
2...Contact part.

Claims (1)

[Scope of utility model registration request] A stator core, a coil wound around a magnetic pole of the stator core, a coil holder attached to the stator core and holding the coil in a fixed shape, and a lead-out end of the coil attached to the outer surface of the coil holder. and three or more terminals connected to each other, the coil holder is provided with a convex curved contact portion that contacts the coil, and each of the terminals is connected to the convex curved surface on an outer surface of the contact portion. A stator for a small motor characterized by being arranged at equal intervals along the stator.