EP0163142A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Brushless motor
Assignee: Sanyo Electric Co Ltd
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Filing: 1985-04-26
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Granted: —
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Expires: 2005-04-26
Abstract
Abstract A brushless motor (10) comprises a stator yoke plate (16) made of a magnetic material, to which both main surfaces the first and the second flexible printed circuit boards (20) (22) formed integrally including a connecting part (24) are stuck respectively. On the first flexible printed circuit board (20), a plurality of driving coils (30) are arranged annularly and a conductor pattern for a speed detecting coil is formed inside the driving coils (30). On the integrated stator yoke plate (16) and the first and second flexible printed circuit boards (20) (22), a penetrated hole (18) for passing through a rotor shaft (54) is formed generally in the center. A tongue (36) is formed generally in protrusion inwardly from the periphery defining the penetrated hole (18) on which a connecting conductor pattern connected to the speed detecting coil is formed. The tongue (36) is folded back toward the side of the second flexible printed circuit board (22) through the penetrated hole (18) and the connecting conductor pattern is connected to the second flexible printed circuit board (22). An alternating signal induced in the speed detecting coil is withdrawn from the second flexible printed circuit board (22).
Inventors
- 👤 Nobuyoshi Amao
- 👤 Yoshihisa Takahashi
- 👤 Hitoshi Yokomizo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 21:05
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06; H02K29/08; H02K29/14; Y; Y10; Y10S; Y10S310/00; Y10S310/03
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
In a brushless motor (10) comprising a stator yoke plate (16), driving coils (30) associated with said stator yoke plate and connected to a printed circuit board, a rotor (14) and a rotor magnet (48) disposed on said rotor and opposing said driving coils via a predetermined gap, characterized in that said printed circuit board includes first and second flexible printed circuit boards (20)(22) stuck respectively onto the both surfaces of said stator yoke plate and interconnected electrically by a connecting means (24),
Claim 2
Dependent Claim
83 words
In a brushless motor (10) comprising a stator yoke plate (16), driving coils (30) associated with said stator yoke plate and connected to a printed circuit board, a rotor (14) and a rotor magnet (48) disposed on said rotor and opposing said driving coils via a predetermined gap, characterized in that said printed circuit board includes first and second flexible printed circuit boards (20)(22) stuck respectively onto the both surfaces of said stator yoke plate and interconnected electrically by a connecting means (24),
Claim 3
Dependent Claim
55 words
A brushless motor in accordance with claim l, wherein said connecting means (24) includes a connecting portion (24) for connecting said first flexible printed, circuit board (20) integrally with said second flexible printed circuit board (22), which are folded back and stuck respectively onto the main surfaces of said stator yoke plate (16) corresponding thereto.
Claim 4
Dependent Claim
36 words
A brushless motor in accordance with claim 2, which further comprises a speed detecting coil (34) and magnetic flux providing means (50) disposed on said rotor for providing said speed detecting coil with the magnetic flux.
Claim 5
Dependent Claim
35 words
A brushless motor in accordance with claim 3, wherein said speed detecting coil (34) is disposed inside said driving coils (30) and said magnetic flux providing means (50) is arranged inside said rotor magnet (48).
Claim 6
Dependent Claim
60 words
A brushless motor in accordance with claim 3, which further comprises coil connecting means (36,38;60,64;36') for connecting said speed detecting coil (34) to said second flexible printed circuit board (22), and means (46) for withdrawing the electromotive force generated in said speed detecting coil (34) and led to said second flexible printed circuit board (22) through said coil connecting means.
Claim 7
Dependent Claim
89 words
A brushless motor in accordance with claim 5, wherein a penetrated hole (18,26,28) is formed generally in the center of an integrated body of said stator yoke plate (16), said first and second flexible printed circuit boards (20)(22), and said coil connecting means (36,38;60,64;36 1 ) includes a tongue piece (36) formed in protrusion from the periphery defining said penetrated hole (26) of said first flexible printed circuit board (20), which is folded back through said penetrated hole (18,26,28) and connected to said second flexible printed circuit board (22).
Claim 8
Dependent Claim
85 words
A brushless motor in accordance with claim 1, which further comprises a speed detecting coil (34), magnetic flux providing means (50) disposed on said rotor for providing said speed detecting coil with magnetic flux, coil connecting means (36,38;60,64:36') for connecting said speed detecting coil (34) to said second flexible printed circuit board (22), and means (46) for withdrawing the electromotive force generated in said speed detecting coil .(34) - and led to said second flexible printed circuit board (22) through said coil connecting means (36,38;60,64;36').
Claim 9
Dependent Claim
34 words
A brushless motor in accordance with claim 7, wherein said coil connecting means (36,38;60,64;36') includes a tongue piece (36;60) drawn out from either to other of said first and second flexible printed circuit boards.
Claim 10
Dependent Claim
33 words
A brushless motor in accordance with claim 7, wherein said tongue piece (36;60) includes a connecting portion, on which a notch (68) or an aperture (70) is formed for insuring the connection thereof.
Claim 11
Dependent Claim
37 words
A brushless motor in accordance with claim 2, which further comprises a third flexible printed circuit board (72) which is coupled to said first flexible printed circuit board (20) and folded back on said driving coils (30).
Claim 12
Dependent Claim
40 words
A brushless motor in accordance with claim 10, which further comprises a speed detecting coil (34) disposed on said third flexible printed circuit board (72) and magnetic flux providing means (48) for providing said speed detecting coil with magnetic flux.
Claim 13
Dependent Claim
58 words
A brushless motor in accordance with claim 11, which further comprises coil connecting means (36') for connecting said speed detecting coil (34) to said second flexible printed circuit board (22), and means (46) for withdrawing the eletromotive force generated in said speed detecting coil and led to said second flexible printed circuit board through said coil connecting means.
References Cited (Backward Citations)
FR2369728A1
Cited
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