Stable base assembly for closed-loop motor

Abstract

The invention relates to the technical field of VCMs, in particular to a stable base assembly for a closed-loop motor. The stable base assembly comprises a base and a B spring matched with the base, wherein the base comprises a square support plate and a movable through hole penetrating through the square support plate; the axis of the movable through hole coincides with that of the square supportplate; one side, close to the B spring, of the movable through hole extends to form a limiting ring; support tables matched with the B spring are arranged at endpoints of the square support plate; each support table is provided with a first limiting column and second limiting columns at two sides of the first limiting column; and the height and the cross section area of each first limiting columnare greater than those of the corresponding second limiting columns separately, so that, in other words, assembly is carried out within a certain assembly reference range and the assembly accuracy ofthe second limiting columns and corresponding second limiting column holes is relatively high, thereby ensuing the assembly accuracy while achieving fast assembly, and improving the focusing accuracyof the closed-loop motor.

Description

Technical field: [0001] The invention relates to the technical field of VCM, in particular to a stable base assembly for a closed-loop motor. Background technique: [0002] Closed-loop motor (Voice Coil Actuator / Voice Coil Motor) is a device that converts electrical energy into mechanical energy, and realizes linear and limited swing angle motion. A device that uses the interaction between the magnetic field from the permanent magnet steel and the magnetic poles in the magnetic field generated by the energized coil conductor to produce regular motion. Because the closed-loop motor is a non-commutating power device, its positioning accuracy depends entirely on the feedback and control system, and has nothing to do with the closed-loop motor itself. With appropriate positioning feedback and sensing devices, the positioning accuracy can easily reach 10NM, and the acceleration can reach 300g (the actual acceleration also depends on the condition of the load). The camera module...

AI Technical Summary

Problems solved by technology

Due to the limitation of the ball structure, the ball-type closed-loop voice coil motor has a large volume, which is not conducive to the development of end products in the direction of thinning and thinning; and in the non-photographing state, the lens will hit the motor shell and produce abnormal noise, which will affect the user's use; and The structure of the currently announced shrapnel-type closed-loop voice coil motor has a complicated production process and high production costs, which is not conducive to automated production

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