Abstract:
A vehicular exterior rearview mirror system comprises a reflective element assembly, a base frame coupling the reflective element assembly to a vehicle, a support arm for coupling the reflective element assembly to the base frame, and a pivot connection for pivotally coupling the support arm to one of the base frame and the reflective element assembly. The pivot connection comprises a pedestal having at least two detent ribs, and an opening for receipt of the pedestal therethrough having at least two detent channels. Pivoting of one of the support arm relative to the base frame and the reflective element assembly relative to the support arm moves a first one of the at least two detent ribs out of a first one of the at least two detent channels and into a second one of the at least two detent channels.
Abstract:
A vehicular external rearview mirror system comprises a twin-arm assembly comprising a pair of parallel support arms connected at one end to a base attached to the vehicle and movably connected at another end to a reflective element assembly through a movable support bracket. The support bracket supports a reflective element assembly and is attached to the twin-arm assembly through a pair of integral bearings which translate along the arms to extend or retract the reflective element assembly. In one embodiment, the bearing imparts a friction force to the arm to enable the bracket to be moved along the arm under the influence of an extension/retraction force, but to maintain the bracket at a selected position along the arm when the force is removed. In another embodiment, the bearing is adapted for frictionless translation of the bracket along the arms under the influence of a powerextend actuator. In yet another embodiment, the bearing is integrated into the movable support bracket for frictional support of the bracket on the arms.
Abstract:
An afocal rearview mirror assembly for a motor vehicle having a side door and a dashboard includes a housing attached to the motor vehicle adjacent the side door and dashboard. The housing has a low-profile, rounded external portion and an internal portion. A selectively movable reflective element is enclosed within the housing, and has opposed curved surfaces for reflecting unfocused light rays from outside the external portion through the internal portion of the housing. A selectively movable lens is enclosed within the internal portion of the housing for controlling light transmitted from the selectively movable reflective element to an occupant of the motor vehicle. The selectively movable lens can converge the unfocused light rays reflected from the selectively movable reflective element to a focused image observable by the occupant of the motor vehicle.
Abstract:
An extendable, foldable rearview mirror assembly comprises a ball bearing assembly for facilitating the extension of a reflective element assembly relative to a cantilevered extension arm while minimizing unwanted movement of the reflective element assembly. The rearview mirror assembly also comprises a roller bearing assembly for facilitating the pivotal movement of the extension arm relative to a pivot base frame supporting the extension arm while minimizing unwanted movement of the extension arm. A pin connection pivotably attaches the extension arm to the base frame, thereby strengthening the connection between the two parts while minimizing unwanted movement of the extension arm.
Abstract:
A rearview mirror tilt actuator comprises a clutch assembly that selectively transfers torque from an actuator motor to one of at least two output shafts based upon the speed of the motor. One output shaft can pivot the mirror about a first axis of rotation; another output shaft can pivot the mirror about a second axis of rotation. One output shaft can pivot the mirror housing; the other output shaft can extend and retract the mirror housing. At a low speed, the clutch assembly is disengaged, thus only the first output shaft is activated. At a high speed, the clutch assembly is engaged, thus both output shafts are activated The mirror assembly described herein also has an improved mass configuration which allows for lower moments of inertia in the direction of mirror travel.
Abstract:
A vehicular mirror assembly comprises a base, a mirror housing, and an actuator. The mirror housing has a reflective element therein, and is coupled with the base for at least a normal path of movement between a retracted position where the mirror housing is adjacent the base and an extended position where the mirror housing is distal to the base. The actuator is operatively mounted between the base and the mirror housing for selectively moving the mirror housing with respect to the base through the normal path of movement. The actuator comprises a motor having a rotatable motor shaft, a gear assembly coupled with the motor shaft and rotatable with rotation of the motor shaft, and a rotatable drive shaft coupled with the gear assembly and the mirror housing for moving the mirror housing through the normal path of movement with rotation of the drive shaft. The mirror housing can be moved between the extended and retracted positions by rotation of the drive shaft and the gear assembly independent of the rotation of the motor shaft, and torque developed by the gear assembly resulting from the rotation of the motor shaft is comparable to the torque developed by the gear assembly resulting from the rotation of the drive shaft.
Abstract:
A vehicular external rearview mirror system comprises a twin-arm assembly comprising a pair of parallel support arms connected at one end to a base attached to the vehicle and movably connected at another end to a reflective element assembly through a movable support bracket. The support bracket supports a reflective element assembly and is attached to the twin-arm assembly through a pair of integral bearings which translate along the arms to extend or retract the reflective element assembly. In one embodiment, the bearing imparts a friction force to the arm to enable the bracket to be moved along the arm under the influence of an extension/retraction force, but to maintain the bracket at a selected position along the arm when the force is removed. In another embodiment, the bearing is adapted for frictionless translation of the bracket along the arms under the influence of a powerextend actuator. In yet another embodiment, the bearing is integrated into the movable support bracket for frictional support of the bracket on the arms.
Abstract:
A motorized pivoting and extending mechanism for a vehicular mirror assembly includes, alternatively, a force-reduction mechanism for reducing the friction within the mechanism, and a slip clutch mechanism for reducing overloading of the motor when the limits of mirror extension and retraction have been reached. Mirror power functions receive electrical power and control signals through a circular array of electrical contacts incorporated into the pivot connection irrespective of the pivotal orientation of the mirror. A motor shut-off circuit is able to shut off the motor within a predetermined period of time. The mirror can be angularly adjusted upon movement of the mirror between the retracted and the extended positions to maintain a common field of view for a driver of the vehicle to prevent the extension and/or retraction of the mirror from undesirably repositioning the field of view captured by the mirror.
Abstract:
A rearview mirror assembly having a pivot structure and first and second pairs of helical structures consisting of shape memory alloy wires which serve to adjust the position of the mirror. The wires may be individually heated by conducting an electrical current to effect the contracted memory position. When the current is switched off, a wire cools and can easily be stretched to mechanically transform the wire to a martensitic phase.
Abstract:
A pivoting exterior rearview mirror assembly comprises a mirror housing, a base, a support frame, a pivot assembly, and associated elements comprised primarily of a plastic or polymeric material. The pivot assembly is provided with a pivot reinforcement made of a relatively high-strength material, such as steel. The base is provided with a cantilever reinforcement made of a relatively high-strength material, such as steel. The reinforcing steel increases the load carrying capability of the plastic and reduces the potential material failure of unreinforced plastic.