JPS62132680U

JPS62132680U -

Info

Publication number: JPS62132680U
Application number: JP1946986U
Authority: JP
Priority date: 1986-02-15
Filing date: 1986-02-15
Publication date: 1987-08-21

Description

[Brief explanation of the drawing]

第１図は本考案のコアレスフラツトモータの実
施例による軸心を通る面を切断した縦断正面図、
第２図は本考案による中間ヨークの外観斜視図、
第３図は本考案による外面ヨークの外観斜視図、
第４図は従来のコアレスフラツトモータの例の軸
心を通る面を切断した縦断正面図、第５図は従来
の例に用いられる中間ヨークの外観斜視図である
。１……外面ヨーク、２……中間ヨーク、３……
下面ヨーク、４……磁石、５……電機子、６……
リベツト、７……コミユテータ、８……ブラシ、
９……孔、１０……凸部、１１，３１……軸受、
１２，２２，３２……鍔、２３……切り欠き。 FIG. 1 is a longitudinal sectional front view cut along a plane passing through the axis of an embodiment of the coreless flat motor of the present invention;
Fig. 2 is an external perspective view of the intermediate yoke according to the present invention;
FIG. 3 is an external perspective view of the outer yoke according to the present invention;
FIG. 4 is a longitudinal sectional front view of a conventional coreless flat motor cut along a plane passing through the axis, and FIG. 5 is an external perspective view of an intermediate yoke used in the conventional example. 1... External yoke, 2... Middle yoke, 3...
Lower yoke, 4... Magnet, 5... Armature, 6...
Rivet, 7...Commutator, 8...Brush,
9... Hole, 10... Convex portion, 11, 31... Bearing,
12, 22, 32... Tsuba, 23... Notch.

Claims

[Scope of utility model registration request]

A bearing 11 is provided at the center of the upper wall, a collar 12 is protruded from the outer peripheral edge of the lower part, and a ring-shaped permanent magnet 4 magnetized with multiple poles is fixed to the lower surface of the outer yoke 1 made of a magnetic material on the inner surface of the upper wall. , made of a magnetic material that forms a plurality of coils into a disk shape and forms a magnetic circuit within the outer yoke 1 by maintaining an air gap on the lower surface of the armature 5 which rotates with its shaft mounted on the bearing 11. In a coreless flat motor into which an intermediate yoke 2 is inserted, the outer yoke 1 has a protrusion 10 and a plurality of protrusion steps 13 projecting from the outer periphery to the inner surface, and a cutout 23 that fits into the protrusion 10 is provided on the outer periphery. A coreless flat motor comprising a ring-shaped intermediate yoke 2, and an air gap between the lower surface of the armature 5 and the lower surface of the armature 5 is maintained by the lower part of the step 13 and the upper surface of the intermediate yoke 2.