Actuator for folding and adjustment

Patent metadata

Field	Value
Publication number	US-12522137-B2
Application number	US-202118040578-A
Country	US
Kind code	B2
Filing date	Oct 1, 2021
Priority date	Oct 2, 2020
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

The present disclosure refers to a gear assembly ( 502 ) for an actuator ( 400 ), comprising a gear assembly ( 502 ) having a secondary tilt gear ( 620 ) and a secondary fold gear ( 622 ); wherein said secondary tilt gear ( 620 ) comprises a first spur gear portion ( 902 ), a first worm gear portion ( 904 ), and a first transition point ( 906 ), wherein said first transition point ( 906 ) divides said secondary tilt gear ( 620 ) into said first spur gear portion ( 902 ) and said first worm gear portion ( 904 ); wherein said secondary fold gear ( 622 ) comprises a second spur gear portion ( 912 ), a second worm gear portion ( 914 ), and a second transition point ( 916 ), wherein said second transition point ( 916 ) divides said secondary fold gear ( 622 ) into said second spur gear portion ( 912 ) and said second worm gear portion ( 914 ); and wherein said second worm gear portion ( 914 ) and said second spur gear portion ( 912 ) are formed as a single element. It also refers to an actuator ( 400 ) with such a gear assembly ( 502 ) and a rearview device ( 102, 104 ) with such an actuator ( 400 ).

First claim

The invention claimed is:

1 . An actuator for a rearview device having a mirror head and a mirror base, said actuator comprising:
a fold drive operable to rotate said mirror head in a first direction about a first axis relative to said mirror base and rotate said mirror head in a second direction about said first axis; a tilt drive operable to rotate said mirror head in a third direction about a second axis relative to said mirror base and rotate said mirror head in a fourth direction about said second axis relative to said mirror base; a gear assembly comprising a secondary tilt gear and a secondary fold gear,
wherein the rotation of said secondary fold gear in a first secondary fold gear direction results in said fold drive rotating said mirror head in said first direction about said first axis and wherein the rotation of said secondary fold gear in a second secondary fold gear direction results in said fold drive rotating said mirror head in said second direction about said first axis, and
wherein the rotation of said secondary tilt gear in a first secondary tilt gear direction results in said tilt drive rotating said mirror head in said third direction about said second axis and wherein the rotation of said secondary tilt gear in a second secondary tilt gear direction results in said tilt drive rotating said mirror head in said fourth direction about said second axis;
a primary fold gear comprising a first set of teeth and a plurality of extensions extending radially inward from an inner circumference of said primary fold gear, wherein a distance between each of said plurality of extensions is uniformly arranged around said inner circumference, and wherein said plurality of extensions further comprises a first taper; said secondary fold gear comprising a second set of teeth, wherein said first set of teeth of said primary fold gear mesh with said second set of teeth of said secondary fold gear such that said first set of teeth and said second set of teeth have a first spacing; and a gear seat arranged adjacent to said primary fold gear, wherein said gear seat has a second taper, wherein said first taper of said primary fold gear contacts said second taper of said gear seat.

2 . The actuator of claim 1 , wherein said
secondary tilt gear comprising a spur gear portion, a worm gear portion, and a transition point; wherein said transition point divides said secondary tilt gear into said spur gear portion and said worm gear portion; and wherein said worm gear portion comprises a second set of teeth.

3 . The actuator of claim 1 , further comprising:
a spring operable to apply a biasing force to said primary fold gear such that said primary fold gear is biased towards said gear seat, wherein a deformation of the primary fold gear occurs when said primary fold gear is biased towards said gear seat.

4 . The actuator of claim 3 , wherein said deformation of said primary fold gear modifies the first spacing between said first set of teeth of said primary fold gear and said second set of teeth of said secondary fold gear to a second spacing, and wherein said first spacing is different than said second spacing.

5 . A rearview device with an actuator according to claim 1 .

6 . An actuator for a rearview device having a mirror head and a mirror base, said actuator comprising:
a fold drive operable to rotate said mirror head in a first direction about a first axis relative to said mirror base and rotate said mirror head in a second direction about said first axis; a tilt drive operable to rotate said mirror head in a third direction about a second axis relative to said mirror base and rotate said mirror head in a fourth direction about said second axis relative to said mirror base; a gear assembly comprising a secondary tilt gear and a secondary fold gear,
wherein the rotation of said secondary fold gear in a first secondary fold gear direction results in said fold drive rotating said mirror head in said first direction about said first axis and wherein the rotation of said secondary fold gear in a second secondary fold gear direction results in said fold drive rotating said mirror head in said second direction about said first axis, and
wherein the rotation of said secondary tilt gear in a first secondary tilt gear direction results in said tilt drive rotating said mirror head in said third direction about said second axis and wherein the rotation of said secondary tilt gear in a second secondary tilt gear direction results in said tilt drive rotating said mirror head in said fourth direction about said second axis;
a gear assembly comprising a primary tilt gear, a spindle and a carrier arranged on said spindle, wherein said carrier comprises a slot; wherein said primary tilt gear comprises a carrier connector receivable in said slot of said carrier; wherein said primary tilt gear may rotate in a first tilt direction or a second tilt direction; and wherein said carrier is slidable in a first translation direction along said spindle when the primary tilt gear rotates in said first tilt direction; and said carrier is slidable in a second translation distance along the spindle when said primary tilt gear rotates in said second tilt direction.

7 . The actuator of claim 6 , further comprising
a wiper attached to said carrier.

8 . The actuator of claim 7 , further comprising
a PCB with an attached carbon strip wherein said wiper contacts said carbon strip.

9 . The actuator of claim 7 , wherein
said wiper is slidable along said carbon strip in a first wiper direction when said carrier slides in said first translation direction along said spindle; and wherein said wiper is slidable along said carbon strip in a second wiper direction when said carrier slides in said second translation direction along said spindle.

10 . A rearview device with an actuator according to claim 6 .

Assignees

• Motherson Innovations Co Ltd

Inventors

• Beecher Stephen
• Harris Tom
• Aspden Gareth
• Kershaw David
• Kurti Levente
• Park Dong Myeong
• Jones Warwick

Classifications

• F16D13/44

  in which the clutching pressure is produced by springs only · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K7/1166

  comprising worm and worm-wheel (structural association with bearings specially adapted for worm gear drives H02K7/081) · CPC title

• F16H55/22

  for transmissions with crossing shafts, especially worms, worm-gears · CPC title

• F16H1/225 Primary

  with two or more worm and worm-wheel gearings · CPC title