Commutator device for miniature motors

• US 4,521,710 A
• Filed: 12/29/1983
• Issued: 06/04/1985
• Est. Priority Date: 12/29/1982
• Status: Expired due to Term

• Current Assignee: Mabuchi Motor Company Limited
• Original Assignee: Mabuchi Motor Company Limited
• Inventors: Mabuchi, Takaichi
• Primary Examiner(s): Skudy, R.
• Application Number:
  US06/566,717
• Time in Patent Office: 523 Days
• Field of Search: 310/233-237, 310/40 MM, 310/42, 310/219, 310/232, 29/597, 29/863
• US Class Current: 310/234
• CPC Class Codes: H01R 39/32 Connections of conductor to commutator segment
• CPC Class Codes: H01R 4/02 Soldered or welded connections H01R4/625, H01R4/723, H01R12/59 take precedence
• CPC Class Codes: H01R 4/18 by crimping H01R4/01, H01R4/2495 take precedence; for coaxial cables H01R9/0518
• CPC Class Codes: Y10T 29/49011 Commutator or slip ring assembly
• CPC Class Codes: Y10T 29/49185 of terminal

Abstract

A commutator device for miniature motors comprising commutator segments, each segment having an arc-shaped commutator part and a terminal part standing upright from the commutator part; the commutator part being mounted on an insulating cylinder and the terminal part being bent to hold a lead wire connected to an armature winding wherein the terminal part of the commutator segment has a neck portion at which the transverse crosssectional area of the terminal part is made smaller than the transverse crossectional area of other portions therof, and an arrangement for easily bonding the lead wire to the neck portion is provided so that the lead wire is held in position by bending the terminal part at the neck portion thereof, and welded to the terminal part with resistance welding.

Claims

1. A commutator device for miniature motors comprising commutator segments having arc-shaped commutator parts and terminal parts standing upright from said commutator parts;

said commutator segments being mounted on an insulating cylinder and said terminal parts being bent to hold lead wires of armature windings, said terminal parts having another portion and a neck portion having a smaller transverse cross-sectional area than the transverse cross-sectional area of said another portion of said terminal part, and means for easily bonding said lead wire is provided on said neck portion to permit said terminal part to be bent at said neck portion to hold said lead wire and to allow said terminal part and said lead wire to be fused together with resistance welding, comprising linear ridges extending in the longitudinal direction of said terminal part.

2. A commutator device for miniature motors as set forth in claim 1 wherein said linear ridges are provided obliquely in the longitudinal direction of said terminal part as said means for easily bonding said lead wire at said neck portion.

3. A commutator device for miniature motors as set forth in claim 1 wherein said linear ridges are arranged in the longitudinal direction of said terminal part, in combination with a low-melting layer deposited on said terminal part, as said means for easily bonding said lead wire at said terminal part.

4. A commutator device for miniature motors as set forth in clam 2 wherein said linear ridges are arranged obliquely in the longitudinal direction of said terminal part, in combination with a low-melting metal layer deposited on said terminal part, as said means for easily bonding said lead wire at said terminal part.

5. A commutator device for miniature motors comprising commutator segments having arc-shaped commutator parts and terminal parts standing upright from said commutator parts;

said commutator segments being mounted on an insulating cylinder and said terminal parts being bent to hold lead wires of armature windings, said terminal parts having another portion and a neck portion having a smaller transverse cross-sectional area than the transverse cross-sectional area of said another portion of said terminal part, and means for easily bonding said lead wire is provided on said neck portion to permit said terminal part to be bent at said neck portion to hold said lead wire and to allow said terminal part and said lead wire to be fused together with resistance welding, said means comprising a multiplicity of knobs being provided on said terminal part as said means for easily bonding said lead wire at said neck portion.

6. A commutator device for miniature motors comprising commutator segments having arc-shaped commutator parts and terminal parts standing upright from said commutator parts;

said commutator segments being mounted on an insulating cylinder and said terminal parts being bent to hold lead wires of armature windings, said terminal parts having another portion and a neck portion having a smaller transverse cross-sectional area than the transverse cross-sectional area of said another portion of said terminal part, and means for easily bonding said lead wire is provided on said neck portion to permit said terminal part to be bent at said neck portion to hold said lead wire and to allow said terminal part and said lead wire to be fused together with resistance welding, said means including a multiplicity of knobs being provided on said terminal part, in combination with a low-melting metal layer deposited on said terminal part, as said means for easily bonding said lead wire at said terminal part.