A magnet fixing implement for fixing a magnet for rotation angle detection, attached to a rotation center portion of an indicator needle of an analog meter, includes a main body, a magnet holder provided on an upper surface of the main body, and configured to hold the magnet at a rotation center of the indicator needle, a slit formed in the main body in a flat shape perpendicular to the rotation center, and configured to accommodate the rotation center portion of the indicator needle, a rotation shaft holder provided below the slit of the main body, and configured to hold a rotation shaft of the indicator needle, and an indicator needle restricting portion protruding toward an outer side from an outer peripheral edge of the main body, and configured to restrict a rotation of the indicator needle with respect to the main body.

A magnet fixing implement for fixing a magnet for rotation angle detection, attached to a rotation center portion of an indicator needle of an analog meter, includes a main body, a magnet holder provided on an upper surface of the main body, and configured to hold the magnet at a rotation center of the indicator needle, a slit formed in the main body in a flat shape perpendicular to the rotation center, and configured to accommodate the rotation center portion of the indicator needle, a rotation shaft holder provided below the slit of the main body, and configured to hold a rotation shaft of the indicator needle, and an indicator needle restricting portion protruding toward an outer side from an outer peripheral edge of the main body, and configured to restrict a rotation of the indicator needle with respect to the main body.

Systems and methods are disclosed and include a needle control module that includes a processor configured to execute instructions stored in a nontransitory computer-readable medium, a motor driver circuit in communication with the needle control module, the motor driver circuit controlling a stepper motor attached to a needle, and a housing enclosing the needle control module, the motor driver circuit, and the stepper motor, the housing being physically attached to a display of a vehicle. In response to the needle control module receiving a signal representing vehicle state information, the needle control module is configured to instruct the motor driver circuit to control movement of the stepper motor and adjust a position of the needle based on the signal.

An indicator instrument for a vehicle includes a rotational indicator that indicates a vehicle state parameter, and a stepper motor that rotates the rotational indicator. The stepper motor includes an output gear, a reduction mechanism, a motor casing housing the output gear and the reduction mechanism. The output gear includes an output shaft rotatable together with the rotational indicator, and a last-stage gear extending radially outward from the output shaft. The reduction mechanism includes a reduction gear engaged with the last-stage gear. The rotational indicator includes a rotational shaft press-fitted to a specified portion of the output shaft in the motor casing. The specified portion is displaced from the last-stage gear in an axial direction of the output shaft.

An indicator instrument for a vehicle includes a rotational indicator that indicates a vehicle state parameter, and a stepper motor that rotates the rotational indicator. The stepper motor includes an output gear, a reduction mechanism, a motor casing housing the output gear and the reduction mechanism. The output gear includes an output shaft rotatable together with the rotational indicator, and a last-stage gear extending radially outward from the output shaft. The reduction mechanism includes a reduction gear engaged with the last-stage gear. The rotational indicator includes a rotational shaft press-fitted to a specified portion of the output shaft in the motor casing. The specified portion is displaced from the last-stage gear in an axial direction of the output shaft.

The geared motor and pointer display device are provided with a stopper mechanism which restricts the range of movement of the trailing-side gear when the trailing-side gear rotates in a counter-clockwise direction. Of the stopper touching part and the part touched by the stopper that together constitute the stopper mechanism, the stopper touching part comprises the end of a gear-side protrusion which is integrally formed with the middle part at the outer peripheral surface of the middle part of the trailing-side gear. As a consequence, the stopper touching part comes into contact with the part touched by the stopper at a position close to the central axis of rotation of the trailing side gear. Therefore, when the stopper mechanism is activated, the collision energy to which the trailing side cog is subjected is minimal, which makes it possible to suppress the rebound of the trailing side gear.

The geared motor and pointer display device are provided with a stopper mechanism which restricts the range of movement of the trailing-side gear when the trailing-side gear rotates in a counter-clockwise direction. Of the stopper touching part and the part touched by the stopper that together constitute the stopper mechanism, the stopper touching part comprises the end of a gear-side protrusion which is integrally formed with the middle part at the outer peripheral surface of the middle part of the trailing-side gear. As a consequence, the stopper touching part comes into contact with the part touched by the stopper at a position close to the central axis of rotation of the trailing side gear. Therefore, when the stopper mechanism is activated, the collision energy to which the trailing side cog is subjected is minimal, which makes it possible to suppress the rebound of the trailing side gear.

A geared motor includes a stopper mechanism restricting the range of movement when the trailing gear rotates in a counter-clockwise direction. In the stopper mechanism, a first and a second angle ranges are obtained by dividing the range of angle of rotation of the trailing side gear by a virtual line passing through the center of rotation of the trailing side gear and the center of rotation of the driving side gear. In the first angle range in which the stopper touching part moves in a direction approaching the center of rotation of the driving side gear when the trailing side gear rotates in a counter-clockwise direction, the stopper touching part touches the part to be touched by the stopper. Thus, when the stopper mechanism is activated, the trailing side gear is subjected to a reaction force in a direction away from the driving side gear, making the meshing shallower.

A geared motor includes a stopper mechanism restricting the range of movement when the trailing gear rotates in a counter-clockwise direction. In the stopper mechanism, a first and a second angle ranges are obtained by dividing the range of angle of rotation of the trailing side gear by a virtual line passing through the center of rotation of the trailing side gear and the center of rotation of the driving side gear. In the first angle range in which the stopper touching part moves in a direction approaching the center of rotation of the driving side gear when the trailing side gear rotates in a counter-clockwise direction, the stopper touching part touches the part to be touched by the stopper. Thus, when the stopper mechanism is activated, the trailing side gear is subjected to a reaction force in a direction away from the driving side gear, making the meshing shallower.

The geared motor and pointer device are provided with a stopper mechanism which restricts the range of movement of the trailing-side gear when the trailing-side gear rotates in a counter-clockwise direction. In the stopper mechanism, the part to be touched by the stopper comprises a support-side protrusion which protrudes towards the center of rotation of the trailing-side gear, and the width dimension in the peripheral direction of the support-side protrusion is smaller on the inside in the radial direction than on the outside in the radial direction. As a consequence, even if the width in the peripheral direction of the support-side protrusion is increased to a certain extent in order to ensure strength, when the stopper mechanism is activated, the stopper touching part and the part to be touched by the stopper come into contact at a position close to the center of rotation of the trailing-side gear.