Driving apparatus and device fabrication method

• US 10,447,136 B2
• Filed: 04/18/2014
• Issued: 10/15/2019
• Est. Priority Date: 12/31/2013
• Status: Active Grant

• Current Assignee: BOLY Media Holdings Company Limited
• Original Assignee: BOLY Media Holdings Company Limited
• Inventors: Hu, Xiaoping
• Primary Examiner(s): Harrington, Alicia M
• Application Number:
  US15/109,119
• Publication Number:
  US 20160329801A1
• Time in Patent Office: 2,006 Days
• CPC Class Codes: G02B 7/09 adapted for automatic focusing or varying magnification
• CPC Class Codes: G03B 13/36 Autofocus systems
• CPC Class Codes: G03B 2205/0046 Movement of one or more optical elements for zooming for optical zoom lenses in general G02B7/10
• CPC Class Codes: G03B 2205/0069 using electromagnetic actuators, e.g. voice coils
• CPC Class Codes: G03B 5/00 Adjustment of optical system relative to image or object surface other than for focusing
• CPC Class Codes: H02K 15/16 Centering rotors within the stator; Balancing rotors
• CPC Class Codes: H02K 33/02 with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
• CPC Class Codes: H02K 41/0356 moving along a straight path
• CPC Class Codes: H02K 99/20 Motors

Abstract

A driving apparatus comprises a stator (21), a rotor (22) and a deformation connector (23). The rotor is connected to the stator through the deformation connector. An external driving force drives the deformation connector to have deformation so that the rotor changes its position with respect to the stator. Under the condition that no external driving force is applied, the deformation connector remains at a force balanced position (x0). The force on the deformation connector comprises a deformation force (F1) of the deformation connector and a first primitive force (F2) in opposite direction to the deformation force (F1). Also provided is a device fabrication method. Because the deformation connector keeps balance under the effect of the deformation force and the first primitive force, a small external driving force is required when the driving apparatus operates near the balance point, hereby reducing power consumption.

Claims

1. A driving device, comprising:

a stator, a mover and a deformable connection member, wherein the mover is connected with the stator through the deformable connection member and an exogenous driving force drives the mover or the deformable connection member to deform such that a position of the mover with respect to the stator is changed, and wherein;

when the exogenous driving force has not been applied, forces acting on the deformable connection member comprise a deformation force of the deformable connection member and a first native force which is keeping opposite to the deformation force in direction, and the deformable connection member is kept at a force balance position of the deformation force and the first native force;

wherein the force balance position is located at one of or between two endpoints of a working range of the deformable connection member;

wherein the mover comprises a first magnet, the first magnet is a permanent magnet, the deformable connection member is a coil spring, and materials of the coil spring comprises conductive materials which are used to act as a coil driving the mover to move;

the exogenous driving force comprises an electromagnetic force which is generated by the coil spring and used to drive the mover to move; and

the first magnet is arranged on a curved slope, and the first native force comprises a component of a gravity of the first magnet in a direction opposite to a direction of an elastic force of the coil spring.

2. A driving device, comprising a stator, a mover and a deformable connection member, wherein the mover is connected with the stator through the deformable connection member and an exogenous driving force drives the mover or the deformable connection member to deform such that a position of the mover with respect to the stator is changed, and wherein:

when the exogenous driving force has not been applied, forces acting on the deformable connection member comprise a deformation force of the deformable connection member and a first native force which is keeping opposite to the deformation force in direction, and the deformable connection member is kept at a force balance position of the deformation force and the first native force;

wherein the force balance position is located at one of or between two endpoints of a working range of the deformable connection member,

wherein the stator or the mover comprises a first magnet, the first magnet is a permanent magnet, the deformable connection member is a magnetic coil spring, materials of the magnetic coil spring comprise conductive materials and permanent magnetic or magnetism reception materials, and the permanent magnetic or magnetism reception materials of the magnetic coil spring is used to act as a second magnet;

the first native force comprises an attractive or repellent magnetic force between the first magnet and the second magnet; and

the conductive materials of the magnetic coil spring is used to act as a coil which drives the mover to move, and the exogenous driving force comprises an electromagnetic force which is generated by the magnetic coil spring and used to drive the mover to move;

or the conductive materials of the magnetic coil spring is used to act as a coil which drives the mover to move, the mover or the stator further comprises a first coil, and the exogenous driving force comprises electromagnetic forces which are generated by the first coil and the magnetic coil spring and used to drive the mover to move.

3. A driving device, comprising a stator, a mover and a deformable connection member, wherein the mover is connected with the stator through the deformable connection member and an exogenous driving force drives the mover or the deformable connection member to deform such that a position of the mover with respect to the stator is changed, and wherein:

when the exogenous driving force has not been applied, forces acting on the deformable connection member comprises a deformation force of the deformable connection member and a first native force which is keeping opposite to the deformation force in direction, and the deformable connection member is kept at a force balance position of the deformation force and the first native force;

wherein the force balance position is located at one of or between two endpoints of a working range of the deformable connection member,

wherein the stator and the mover comprise a first electrode and a second electrode which have electric charges with opposite or same polarity, respectively, the deformable connection member is a spring leaf, the first native force comprises an electrostatic attraction force or repelling force between the first electrode and the second electrode, a piezoelectric ceramics or memory metal is further provided between the stator and the mover, and the exogenous driving force comprises a deformation force generated by the piezoelectric ceramics or memory metal after power is supplied thereto.

4. The device of claim 3, wherein the spring leaf is made from high dielectric constant materials and applied with an insulation coating on an outer surface thereof, or is integrated with the piezoelectric ceramics or memory metal.

5. A device manufacture method, comprising:

manufacturing a stator, a mover and a deformable connection member, wherein the mover is connected with the stator through the deformable connection member, and wherein

before an exogenous driving force is applied, applying a first native force to the deformable connection member such that the deformable connection member is kept at a force balance position under action of a deformation force of the deformable connection member itself and the first native force which is keeping opposite to the deformation force in direction, wherein the exogenous driving force is used to drive the mover or the deformable connection member to deform such that a position of the mover with respect to the stator is changed;

wherein the force balance position is located at one of or between two endpoints of a working range of the deformable connection member;

wherein at the force balance position, a variation factor k1 of the deformation force is larger than a variation factor k2 of the first native force.

6. The method of claim 5, wherein the method is a method for manufacturing a zoom lens, the stator and the mover comprise a first electrode and a second electrode which have electric charges with opposite or same polarity, respectively, the deformable connection member is a spring leaf, the first native force comprises an electrostatic attraction force or repellent force between the first electrode and the second electrode, a piezoelectric ceramics or memory metal is further provided between the stator and the mover, the exogenous driving force comprises a deformation force generated by the piezoelectric ceramics or memory metal after power is supplied thereto, and the mover is hollow and a focus or zoom lens group is installed at interior of the mover.

7. The method of claim 5, wherein the method is a method for manufacturing a natural energy generator,

the mover comprises a first magnet, and the first magnet is a permanent magnet;

the deformable connection member is a spring or a coil spring, and materials of the coil spring comprise conductive materials which are used to act as an excitation coil;

the mover is used to act as a generator mover or drive a generator mover, the exogenous driving force comprises an external force acting on the mover, and the external force is obtained from a natural energy; and

the first magnet is arranged on a curved slope and the first native force comprises a component of a gravity of the first magnet in a direction opposite to a direction of an elastic force of the coil spring.