CN201018387Y - High-efficiency voice coil motor - Google Patents

Abstract

A high-efficiency voice coil motor mainly comprises a fixed seat and a movable seat, wherein a magnetic part is arranged in the fixed seat, the movable seat is accommodated in the fixed seat, the movable seat is provided with a coil group, the coil group can act with the magnetic part when being electrified, so that the movable seat and the fixed seat generate relative displacement, and the magnetic part is magnetized into four poles, thereby providing the action of a part with higher magnetic line density and the coil group, and improving the efficiency; wherein, four sides of the fixed seat are respectively provided with a magnetic part, and the movable seat is provided with four coil groups corresponding to the magnetic parts. The utility model discloses can improve the benefit of utilizing in magnetic part magnetic field, and reducible winding number of turns to coil assembly, or demand such as the electric current ampere of coil assembly, or change demand such as the stronger magnetic part in magnetic field, reduce product cost and reduce the waste of electric energy.

Description

High efficiency voice coil motor

technical field

The utility model relates to a motor, in particular to a high-efficiency voice coil motor which can improve the utilization efficiency of the magnetic field of the magnetic parts, reduce the production cost and reduce the consumption of electric energy.

Background technique

The voice coil motor is installed in the lens module for telescopic adjustment and focus. By cooperating with the magnetic parts and the coil group, the size and direction of the current passing through the coil group and the spring stretching and restoring force characteristics of the upper and lower shrapnel can be used to make it possible. Achieve the functions of controlling and adjusting the focus such as upward and downward displacement or reset.

The existing voice coil motors are all equipped with several two-pole magnetic parts in the fixed seat, and the corresponding coil group is arranged on the movable seat provided with the lens, and the coil group is located at the place adjacent to the magnetic part. The magnetic field generated by electrification interacts with the magnetic field of the magnetic part to generate a driving force for moving the movable seat.

However, the existing voice coil motor is less effective in utilizing the direction of the effective magnetic field. Please refer to FIG. Diverging to the S pole on the other side, the place where the magnetic force lines are denser and parallel, that is, the place where the magnetic field strength is greater lies in the center of the respective surfaces of the N pole and the S pole; the place where the magnetic force lines are sparser and scattered, that is, the place where the magnetic field strength is smaller At the edge and vicinity of the contact surface between pole and S pole, the direction of the magnetic field line of the existing two-pole magnetic part of the voice coil motor is more chaotic, and the loss is more, so the magnetic field of the magnetic part cannot be effectively used, and the winding of the coil group must be increased. The number of turns, or the current amperage of the coil group, or replace the magnetic parts with a stronger magnetic field, so as to make up for the shortcomings of the poor utilization of the magnetic field.

From the above, it can be seen that because the existing voice coil motors have poor utilization of the magnetic field strength direction, it is necessary to increase the number of turns of the coil group, the current flow, or replace the magnetic parts with stronger magnetism, which not only causes troubles in design and manufacture , will increase the overall cost, or make the power consumption of the finished product higher, so on the whole, the practicability is poor, and there is still a need for improvement.

Utility model content

The main technical problem to be solved by the utility model is to overcome the above defects in the prior art, and provide a high-efficiency voice coil motor, which can improve the utilization efficiency of the magnetic field of the magnetic parts, reduce the production cost, and reduce the consumption of electric energy.

The technical scheme that the utility model solves its technical problem adopts is:

A high-efficiency voice coil motor is characterized in that it mainly includes a fixed seat and a movable seat, the fixed seat is provided with magnetic parts, the movable seat is accommodated in the fixed seat, and the movable seat is provided with a coil group. When the coil group is energized, it can interact with the magnetic part to cause a relative displacement between the movable seat and the fixed seat, and the magnetic part is magnetized into four poles, so as to provide a place with a high magnetic force line density to interact with the coil group to improve performance.

In the above-mentioned high-efficiency voice coil motor, a magnetic part is respectively arranged on four sides of the fixed seat, and the movable seat is corresponding to the magnetic part, and is also provided with a four-coil group.

In the aforementioned high-efficiency voice coil motor, two shrapnels are provided at the bottom of the movable seat, and each of the two lower shrapnels is provided with a polar plate, and the two lower shrapnels are electrically connected with the coil group of the movable seat, and can be provided to the movable seat. Resetting elastic.

In the above-mentioned high-efficiency voice coil motor, the upper end of the movable seat is provided with an upper shrapnel, so as to provide elastic force for reset to the movable seat.

In the aforementioned high-efficiency voice coil motor, the fixed seat and the movable seat are set by an upper cover and a lower cover.

In the above-mentioned high-efficiency voice coil motor, a frame made of insulating material is arranged at the bottom of the fixing base for insulating and isolating the fixing base and the two metal lower elastic pieces.

The beneficial effect of the utility model is that it can improve the utilization efficiency of the magnetic field of the magnetic part, and can reduce the demand for the number of winding turns of the coil group, or the current amperage of the coil group, or replace the magnetic part with a strong magnetic field, etc. , reduce product cost and reduce the waste of electric energy.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

FIG. 1 is a three-dimensional exploded schematic view of the high-efficiency voice coil motor of the present invention.

FIG. 2 is a perspective schematic view of the appearance of the high-efficiency voice coil motor of the present invention.

Fig. 3 is a schematic diagram of the magnetic force lines of the magnetic part of the high-efficiency voice coil motor of the present invention.

Fig. 4, Fig. 5 are the action schematic diagrams of sectioning along A A line segment shown in Fig. 2.

Fig. 6, Fig. 7 are along the sectional action schematic diagram of BB line segment shown in Fig. 2.

FIG. 8 is a schematic diagram of magnetic force lines of a conventional two-pole magnetic member of a voice coil motor.

Explanation of symbols in the figure:

11——upper cover body 111——support rod

12——Lower cover body 121——Bracket

20——fixed seat 21——accommodating space

22 Magnetic parts 23 - Frame

24 - upper shrapnel 25 - lower shrapnel

251——polar plate 30——movable seat

31—coil group

Detailed ways

The utility model relates to a high-efficiency voice coil motor, please refer to Figure 1 and Figure 2, this high-efficiency voice coil motor mainly includes an upper cover 11, a lower cover 12, a fixing seat 20, and A movable seat 30, wherein:

The upper cover body 11 and the lower cover body 12 are in a corresponding shape, the upper cover body 11 is generally square, and each of the four corners of the upper cover body 11 is extended with a rod 111, and the lower cover body 12 is also generally square, Cooperate with the pole 111 of the upper cover body 11 and provide a support 121 at the four corners of the lower cover body 12. The support pole 111 can be embedded and positioned on the support 121, so as to combine the upper and lower cover bodies 11, 12, and Each component is set in it;

The fixing seat 20 is a magnetically permeable metal seat with a cylinder in a roughly square shape. The four corners of the fixing seat 20 are slightly retracted for the support rods 111 of the upper cover 11 to pass through and fix. The center of the fixing seat 20 has an accommodating space 21 for For the accommodation of the movable seat 30, a magnetic part 22 is respectively fixed on the inner walls of the four sides of the fixed seat 20. The magnetic part 22 is magnetized into a quadrupole form. The bottom of the fixed seat 20 cooperates with a frame body 23 to position the magnetic part 22, and An upper elastic piece 24 is accommodated between the fixed seat 20 and the upper cover body 11, and the upper elastic piece 24 is glued and fixed with the upper edge of the movable seat 30. The fixed seat 20 is equipped with a frame body 23 of insulating material at the bottom. Between the frame body 23 and the lower cover body 12 are accommodated two disconnected lower elastic pieces 25. The frame body 23 is used to insulate and isolate the fixed seat 20 from the two lower elastic pieces 25, and the lower elastic piece 25 is connected to the movable seat 30. The lower edges are glued together and fixed, wherein each of the lower elastic pieces 25 is provided with a pole plate 251, and an external power supply can be connected to the coil group 31 of the movable seat 30;

The movable seat 30 is used for lens assembly, and the adjustment of the upper and lower positions of the movable seat 30 has the effect of focusing; A coil group 31 is provided, the coil group 31 is adjacent to and parallel to the magnetic part 22, and the movable seat 30 is electrically connected with the two lower elastic pieces 25, so that the current input is transmitted through the lower elastic pieces 25, so that the coil group 31 generates a magnetic field and a magnetic field. The magnetic fields of parts 22 interact, and then can generate a driving force to push the movable seat 30 to move up and down in the axial direction, and through the spring stretching and restoring force characteristics of the upper elastic piece 24 and the second lower elastic piece 25, the upward and downward displacement can be controlled and adjusted. Or reset and other focusing functions.

The appearance of the utility model after assembly is shown in Figure 2.

Please refer to Fig. 3, the magnetic part 22 of the present utility model is magnetized as a quadrupole type, so on the side of the magnetic part 22, that is, corresponding to the coil, the obvious magnetic field lines are more concentrated, so that the magnetic field of the magnetic part 22 can be improved The use of strength and directionality makes the cooperation between the magnetic part 22 and the coil group 31 more effective, and can also reduce the number of coil winding turns or the coil current, so as to reduce the product cost and save energy consumption; continued as shown in Figure 4 to Figure 7 As shown, when the utility model is in action, the external power supply is connected to the coil group 31 of the movable seat 30 by the conduction of the dipole plate 251 through the lower shrapnel 25, and the coil group 31 is controlled according to Fleming's left-hand rule and Ampere's right-hand rule. The magnitude and direction of the current can drive the movable seat 30 to receive an axial upward force, and then achieve the effect of controlling the moving position of the movable seat 30 and adjusting the focus; when the movable seat 30 is displaced, it will be linked with the upper and lower shrapnel 24, 25 , Therefore, when the current of the coil group 31 is turned off, the movable seat 30 can still be reset by the spring stretching restoring force of the upper and lower shrapnel 24,25.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model, All still belong to within the scope of the technical solution of the utility model.

In summary, the utility model fully meets the needs of industrial development in terms of structural design, practicability and cost-effectiveness, and the disclosed structure also has an unprecedented innovative structure, novelty, creativity and practicability, and meets the needs of industrial development. According to the requirements of the new patent requirements, the application is filed in accordance with the law.

Claims (6)

1. a high-effect voice coil motor is characterized in that, mainly comprises a holder and a sliding seat, is provided with magnetic part in this holder, and this sliding seat is to be located in the holder, and sliding seat is provided with coil groups, and this magnetic part is that to magnetize be four utmost points.

2. high-effect voice coil motor according to claim 1 is characterized in that described holder four sides are respectively equipped with a magnetic part, and the then corresponding magnetic part of this sliding seat also is provided with four coil groups.

3. high-effect voice coil motor according to claim 1 is characterized in that described sliding seat bottom is provided with shell fragment two times, and these two times shell fragments respectively are provided with a pole plate, and these two times shell fragments and sliding seat coil groups be electrically connect, and the elastic force that resets is provided.

4. high-effect voice coil motor according to claim 1 is characterized in that described sliding seat upper end is provided with shell fragment, provides the elastic force that resets to sliding seat according to this.

5. high-effect voice coil motor according to claim 1 is characterized in that described holder and sliding seat are to set the position with a upper cover body and a lower cover group.

6. high-effect voice coil motor according to claim 1 is characterized in that described holder supplies insulation to isolate shell fragment under holder and two metals in the framework of bottom configuration one insulation material.

Images