CN201322820Y

CN201322820Y - Voice coil motor mobile phone camera with ball bearings

Info

Publication number: CN201322820Y
Application number: CNU2008201444137U
Authority: CN
Inventors: 崔智元; 梁小军; 魏巍
Original assignee: Samsung High Tech Electro Mechanics Tianjin Co Ltd
Current assignee: Samsung High Tech Electro Mechanics Tianjin Co Ltd
Priority date: 2008-12-12
Filing date: 2008-12-12
Publication date: 2009-10-07
Anticipated expiration: 2018-12-12

Abstract

The utility model relates to a voice coil motor mobile phone camera with ball bearings, which comprises a coil, as well as a carrier, a shielding cover, a bracket and a plurality of magnets for fixing a lens group. The coil is wound inside the bracket, the magnets are arranged on the four symmetric edges outside the carrier, and the bracket for fixing the coil is arranged inside the shielding cover. The carrier carrying the lens group is pushed under the action of the magnetic force generated by the electrified coil and the magnets to conduct straight-line motions; and leaf springs for limiting the motion positions of the carrier are arranged on the upper surface and the lower surface of the carrier respectively. The mobile phone camera is characterized in that threads are formed inside the carrier, so that the carrier is in thread fit with the lens group; and convex-concave surfaces are uniformly arranged on the four corners of the carrier and the bracket to accommodate the ball bearings. The ball bearings are arranged between the bracket and a voice coil motor, and the carrier carries the lens group to conduct up-and-down motions along the track direction, so as to ensure the voice coil motor drives the lens group for smooth motions, thereby reducing the occurrence of the phenomena such as inclination and tilting.

Description

Be provided with the voice coil motor mobile phone cam of ball bearing

Technical field

The utility model relates to a kind of mobile phone cam, particularly a kind of voice coil motor mobile phone cam that is provided with ball bearing.

Background technology

At present, in voice coil motor mode automatic focusing mobile phone cam, though the spring leaf that both sides are provided with about carrier can play the effect of certain prop carrier, but because mobile phone is not to work under level conditions all the time, and when the magnetic force that magnetite and coil produce promotion carrier stability is poor slightly, lens group will occur tilting, the phenomenon of perk, makes to focus on instability, and causes portrait bad.In order to obtain good portrait effect, must guarantee the stationarity of lens group, avoid, the phenomenon of perk takes place.

The utility model content

The purpose of this utility model is to overcome above-mentioned weak point, provides a kind of simple in structure, the voice coil motor mobile phone cam that is provided with ball bearing of dependable performance.

The technical scheme that the utility model adopted is for achieving the above object: a kind of voice coil motor mobile phone cam that is provided with ball bearing, this mobile phone cam comprise coil and are used for fixing carrier, radome, support and some magnetites of lens group; Described coil is wrapped in internal stent, and magnetite is arranged on four limits of carrier outer symmetrical, and with the inside that is placed on radome of fixed coil; Upper and lower surface at carrier is respectively equipped with the spring leaf that is used for limiting the carrier movement position simultaneously; It is characterized in that being provided with screw thread in the described carrier, carry out threaded engagement with lens group; Four jiaos of places of carrier and support are set to uniform male and fomale(M﹠F) to place ball bearing.

The ball that embeds on the described bearing is provided with two or more, and is corresponding with the male and fomale(M﹠F) that carrier and four jiaos of places of support are provided with.

The beneficial effects of the utility model are: because the voice coil motor mobile phone cam has used the mode of motion that has ball bearing, the carrier of fixed lens group is close to four limit ball operations in the automatic focusing process, thereby carries out stable orbital motion.This mobile phone cam has following some advantage:

(1) camera size constancy: though increased by four ball bearing, all be arranged on the inner space of support, can not have influence on the overall dimensions of camera.

(2) manufacture craft is simple: bearing can adopt plastic production, makes simple.

(3) save production cost: though can increase its cost price a little compared with existing free from ball bearing voice coil motor, but the voice coil motor that is to use ball bearing can reduce the bad goods that lens group tilts, perk caused to greatest extent, improve and produce qualified ratio, can save production cost effectively on the contrary.

Description of drawings

Fig. 1 is the structural representation of existing voice coil motor;

Fig. 2 is the vertical view that the utility model has the voice coil motor of ball bearing;

Fig. 3 is the planimetric map of four ball bearing in the utility model;

Fig. 4 is the planimetric map of two ball bearing in the utility model;

Fig. 5 is the stereographic map of ball bearing in the utility model.

Among the figure: 1 lens group, 2 magnetites, 3 carriers, 4 radomes, 5 coils, 6 supports, 7 balls, 8 bearings.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, structure, feature that foundation the utility model provides:

As shown in Figure 1, the ultimate principle of voice coil motor is an electromagnetic induction, and coil is subjected to magneticaction and carries out rectilinear motion in magnetic field.The basic structure of voice coil motor comprises coil 5 and is used for fixing carrier 3, radome 4, support 6 and some magnetites 2 of lens group 1.Coil 5 is wrapped in support 6 inside, and magnetite 2 is arranged on four limits of carrier 3 outer symmetrical, and the support 6 of fixed coil 5 is placed the inside of radome 4.Magnetic force that coil 5 energising backs produce and magnetite 2 effects promote to carry out rectilinear motion with the carrier 3 of lens group 1, and the upper and lower surface at carrier 3 is provided with the position that spring leaf is used for limiting carrier 3 motions simultaneously.

As shown in Figure 2, be provided with screw thread in the described carrier 3, carry out threaded engagement with lens group 1; 6 four jiaos of places of carrier 3 and support are provided with four concaveconvex shapes to place ball bearing 8, shown in Fig. 3-5; Or spaced set is more than two, because the ball 7 of 8 li on bearing is close to the male and fomale(M﹠F) of carrier 3, position that can solid bearing 8 can also make carrier 3 drive lens group 1 and move up and down at optical axis direction, to reach the purpose of automatic focusing.

When coil 5 energising, with the carrier 3 of magnetite 2 the magnetic field force effect lower stress of coil 5 is being arranged, the carrier 3 of fixed lens group 1 moves up and down by center position under the friction of ball bearing 8, until reaching distinct image.In order to guarantee carrier 3 in the motion of optical centre direction to stablize, not tilt, described ball 7 should adopt smoothness and the little material of friction factor that guarantees the surface.

The ball 7 that embeds on the described bearing 8 is provided with four, but satisfying two or more all can.And the shape of bearing 8 is made as square, also can be made as rectangle or other different shape.Bearing 8 positions are set also can cooperate requiredly with other part, can be arranged on the inside of support 6 and the outside of carrier 3 arbitrarily according to the needs of production firm self and design mobile phone cam.

Above-mentioned detailed description of this voice coil motor mobile phone cam that is provided with ball bearing being carried out with reference to embodiment; be illustrative rather than determinate; therefore in the variation and the modification that do not break away under the utility model general plotting, should belong within the protection domain of the present utility model.

Claims

1, a kind of voice coil motor mobile phone cam that is provided with ball bearing, this mobile phone cam comprise coil and are used for fixing carrier, radome, support and some magnetites of lens group; Described coil is wrapped in internal stent, and magnetite is arranged on four limits of carrier outer symmetrical, and with the inside that is placed on radome of fixed coil; Upper and lower surface at carrier is respectively equipped with the spring leaf that is used for limiting the carrier movement position simultaneously; It is characterized in that being provided with screw thread in the described carrier, carry out threaded engagement with lens group; Four jiaos of places of carrier and support are set to uniform male and fomale(M﹠F) to place ball bearing.

2, the voice coil motor mobile phone cam that is provided with ball bearing according to claim 1 is characterized in that the ball that embeds on the described bearing is provided with two or more, and is corresponding with the male and fomale(M﹠F) that carrier and four jiaos of places of support are provided with.