Reciprocating drive device having relative-movement preventing unit
First Claim
Patent Images
1. A reciprocating drive device for reciprocating a drive member, comprising:
- a motor including an output shaft having a housing, and a drive gear disposed outside the housing to be rotatable integrally with the output shaft;
a regulator having a driven gear meshing with the drive gear, the driven gear being operatively linked with the drive member;
a support base for supporting the driven gear and for fixing the housing;
a screw-fixing unit through which the housing is directly screwed to the support base; and
a relative-movement preventing unit, being provided by an engagement between the support base and the housing, for preventing a relative movement between the support base and the housing.
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Accused Products
Abstract
In a reciprocating drive device, for example, in a power window device for a vehicle, a drive member is reciprocated by transmitting a rotating force from a motor to a regulator. A driven gear of the regulator is engaged with a drive gear fixed outside a synthetic resin housing of the motor to an output shaft of the motor. In the reciprocating drive device, a relative movement between the housing of the motor and a support base to which the housing is attached with screws is surely prevented by a relative-movement preventing unit having an engagement structure between the support base and the housing.
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Citations
15 Claims
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1. A reciprocating drive device for reciprocating a drive member, comprising:
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a motor including an output shaft having a housing, and a drive gear disposed outside the housing to be rotatable integrally with the output shaft;
a regulator having a driven gear meshing with the drive gear, the driven gear being operatively linked with the drive member;
a support base for supporting the driven gear and for fixing the housing;
a screw-fixing unit through which the housing is directly screwed to the support base; and
a relative-movement preventing unit, being provided by an engagement between the support base and the housing, for preventing a relative movement between the support base and the housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
the relative-movement preventing unit includes a mating projection provided on one of the housing and the support base, and a mating concavity provided on the other of the housing and the support base; and
the mating projection is fitted into the mating concavity when the housing is fixed to the support base by the screw-fixing unit.
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3. The reciprocating drive device according to claim 2, wherein:
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the mating projection has a projection end;
the mating concavity has a concavity end defining the matting concavity; and
the projection end contacts the concavity end at least in a radial direction of the drive gear when the drive member locks.
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4. The reciprocating drive device according to claim 2, wherein the mating projection and the mating concavity are fitted in a vicinity of the drive gear.
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5. The reciprocating drive device according to claim 2, wherein:
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the mating projection is provided on a facing surface of the housing at an interface between the support base and the housing in a vicinity of the output shaft; and
the mating concavity is provided in a facing surface of the support base at the interface between the support base and the housing in a vicinity of the output shaft.
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6. The reciprocating drive device according to claim 5, further comprising:
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a circular arc-shaped reinforcing rib provided on the facing surface of the housing around said output shaft, wherein the mating projection is disposed to be connected to the reinforcing rib.
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7. The reciprocating drive device according to claim 6, further comprising:
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a cover part covering the drive gear and the reinforcing rib, wherein the cover part is disposed to be connected to the mating concavity.
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8. The reciprocating drive device according to claim 7, wherein:
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the cover part has a support bearing; and
one end of the output shaft is rotatably supported in the support bearing of the cover part.
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9. The reciprocating drive device according to claim 7, wherein:
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the driven gear and the housing are disposed on opposite sides relative to the support base; and
the cover part has a pressing part pressing the driven gear toward the support base.
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10. The reciprocating drive device according to claim 2, wherein the mating projection and the mating concavity are disposed on an extending line intersecting with the output shaft from a meshing position where the drive gear and the driven gear mesh.
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11. The reciprocating drive device according to claim 2, wherein:
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the mating projection includes plural projection portions disposed at positions line-symmetrical relative to a line intersecting with the output shaft from a meshing position where the drive gear and the driven gear mesh; and
the mating concavity includes plural concavity portions provided to correspond to the positions of the plural projection portions.
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12. The reciprocating drive device according to claim 1, wherein:
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the screw-fixing unit includes a plurality of screws;
the support base includes a plurality of through holes from which said screws are screwed into the housing; and
a periphery of at least one screw of the screw-fixing unit contacts an inner periphery of one of the through holes in the support base.
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13. The reciprocating drive device according to claim 1, wherein:
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the support base is made of metal; and
the housing is made of synthetic resin.
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14. The reciprocating drive device according to claim 1, wherein the reciprocating drive device is a power window device for reciprocating a window glass.
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15. A reciprocating drive device for reciprocating a drive member, comprising:
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a motor including an output shaft having a housing made of resin, and a drive gear disposed to be rotatable integrally with the output shaft;
a regulator having a driven gear meshing with the drive gear, the driven gear being operatively linked with the drive member;
a support base for supporting the driven gear, said support base being connected to the housing;
a screw-fixing means through which the housing and the support base are directly screwed; and
relative-movement preventing means for preventing a relative movement between the support base and the housing, the relative-movement preventing means being an engagement between the support base and the housing.
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Specification