Utility model content
Based on this, be necessary for above-mentioned technical matters, provide a kind of structure simple and the camera module that energy is cost-saving.
A kind of camera module, comprising:
Housing, comprises sidewall, and described housing is hollow form and both ends open;
Focusing mechanism, be contained in described housing, described Focusing mechanism comprises carrier, upper shell fragment, lower shell fragment, focusing coil and upper magnet, described carrier comprises upper mounting plate, lower installation board and lens group fitted tube, described upper shell fragment is arranged at the upper surface of described upper mounting plate, described lower shell fragment is arranged at the lower surface of described lower installation board, the two ends of described lens group fitted tube are fastened on described upper shell fragment and described lower shell fragment respectively, described lens group fitted tube is hollow form and both ends open, described lower shell fragment comprises two half shell fragments be separated, described focusing coil is around in the outer peripheral edges of described lens group fitted tube, the two ends of described focusing coil are connected on two described half shell fragments, described upper magnet is arranged on the inside surface of the sidewall of described housing, and it is relative with described focusing coil spacing,
Camera lens module, is arranged in described lens group fitted tube;
Stabilization mechanism, comprise guide rod, lower magnet and stabilization coil, the two ends of described guide rod are respectively arranged with spring, described lower magnet is arranged at the inside surface of the sidewall of described housing and is positioned at the below of described upper magnet, described lower magnet is relative with described stabilization coil spacing, and described stabilization coil is arranged at below described lower magnet;
Flexible PCB, has an installed surface, and described stabilization coil is arranged on described installed surface, and described carrier is arranged on described flexible PCB, and described stabilization coil and described focusing coil are all electrically connected with described flexible PCB; And
Base, for carrying described flexible PCB, described base projects upwards and forms guide rod installing plate, described guide rod installing plate offers the first via, described lower installation board projects upwards and is formed with auxiliary positioning wall, described auxiliary positioning wall offers the second via, described guide rod is arranged in described second via, the two ends of described guide rod are arranged in described first via respectively, one end of described spring is connected to the lateral wall of described guide rod installing plate, and the other end is connected to the inside surface of the sidewall of described housing.
Wherein in an embodiment, described base is square, and four corners of described base arrange orthogonal two guide rod installing plates respectively.
Wherein in an embodiment, described lower installation board is square, and the middle part of the four edges of described lower installation board is all given prominence to and is formed with auxiliary positioning wall, and the middle part of described guide rod is arranged in described second via.
Wherein in an embodiment, described upper shell fragment offers the first through hole, the sidewall of described first through hole forms the first elastic arm, described lower shell fragment is formed with the second through hole, the sidewall of described second through hole forms the second elastic arm, and the two ends of described lens group fitted tube are fastened on described first elastic arm and described second elastic arm.
Wherein in an embodiment, the quantity of described guide rod is two right, and being for a pair X-axis guide rod, is for a pair Y-axis guide rod.
Wherein in an embodiment, the quantity of described stabilization coil is two right, it is for a pair X-axis stabilization coil, other is for a pair Y-axis stabilization coil, described in one of them, the side of X-axis stabilization coil is provided with an X-axis hall sensor, described in one of them, the side of Y-axis stabilization coil is provided with a Y-axis hall sensor, described stabilization mechanism also comprises controller, described X-axis hall sensor or described Y-axis hall sensor are used in jitter compensation process, detecting magnetic variable quantity and feeding back to described controller, described controller controls the electric current of described stabilization coil to reach predetermined backoff amount of movement according to magnetic variable quantity.
Wherein in an embodiment, described stabilization mechanism also comprises gyroscope, and described gyroscope is for detecting the amount of movement of described lens group fitted tube.
Wherein in an embodiment, the upper surface of described upper mounting plate is also provided with projection, and the contacted inner surfaces of the upper surface of described projection and the sidewall of described housing connects.
Wherein in an embodiment, described camera lens module comprises lens unit and lens barrel, and described lens unit is arranged in described lens barrel; Described lens group fitted tube is provided with internal thread, and described lens barrel is provided with external thread, and described lens group fitted tube is assembled by described internal thread and described external thread mutually with described lens barrel.
Wherein in an embodiment, also comprise optical filter, described optical filter is positioned at the below of described camera lens module.
Above-mentioned camera module at least has the following advantages:
During focusing, focusing coil is powered by flexible PCB, because focusing coil is subject to Ampère force effect in the magnetic field that upper magnet produces, the lens group fitted tube making to be wound with focusing coil can along optical axis (Z axis) direction up/down movement, thus drive the camera lens module up/down movement be arranged in lens group fitted tube, change the distance between camera lens module and image sensor, realize focus function.When stopping to focusing coil power supply, lens group fitted tube is sprung back to initial position by upper and lower shell fragment.When starting anti-trembling function, stabilization coil is powered by flexible PCB, because stabilization coil is subject to the effect of Ampère force in the magnetic field that lower magnet produces, whole carrier is moved along X-axis or Y direction, moves to realize compensating.When stopping to stabilization coil power supply, guide rod is sprung back to initial position by the spring at guide rod two ends, and guide rod band mobile carrier springs back to initial position.The utility model adopts said structure to realize focusing and anti-trembling function, and structure is simple, and does not adopt suspention line structure, therefore without the need to adopting special material, has saved cost.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the utility model.But the utility model can be much different from alternate manner described here to implement, those skilled in the art can when doing similar improvement without prejudice to when the utility model intension, and therefore the utility model is by the restriction of following public concrete enforcement.
It should be noted that, when element is called as " being fixed on " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.Term as used herein " vertical ", " level ", "left", "right" and similar statement just for illustrative purposes, do not represent it is unique embodiment.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in instructions of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction the utility model.Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
Seeing also Fig. 1 to Fig. 5, is the camera module 10 in an embodiment.This camera module 10 not adopts suspention line structure, can realize focusing and anti-trembling function too.This camera module can be applied to digital camera, digitized video register, mobile phone, intelligent mobile phone, monitor and other there is the electronic product of camera function.This camera module 10 comprises housing 100, Focusing mechanism 200, camera lens module 300, stabilization mechanism 400, flexible PCB 500 and base 600.
It is to be understood that, refer to Fig. 2, in the present embodiment, take optical axis direction as Z-direction, the length direction of housing 100 is Y direction, and the Width of housing 100 is X-direction, specific in present embodiment, the length of housing 100 is equal with the width of housing 100.Z-direction is perpendicular to the plane jointly formed by X-direction and Y direction, and X-direction and Y direction are also mutually vertical.Certainly, in other embodiments, the length of housing 100 also can be unequal with the width of housing 100.
Refer to Fig. 2 to Fig. 5, housing 100 is roughly square, and housing 100 comprises sidewall, and housing 100 is hollow form and both ends open.Particularly, the shape of the opening of housing 100 upper end is circular, and the shape of the opening of housing 100 lower end is square.The size of the opening of upper end is less than the size of the opening of lower end.Housing 100 comprises four sidewalls.Housing 100 can be metal shell, and such as housing 100 can be iron-clad.
Refer to Fig. 1, Fig. 2, Fig. 4 and Fig. 5, Focusing mechanism 200 is contained in housing 100.Focusing mechanism 200 comprises carrier 210, upper shell fragment 220, lower shell fragment 230, focusing coil 240 and upper magnet 250.
The lens group fitted tube 212 that carrier 210 comprises upper mounting plate 211, lower installation board 213 and is separated with upper mounting plate 211, lower installation board 213.Upper shell fragment 220 is arranged at the upper surface of upper mounting plate 211, and lower shell fragment 230 is arranged at the lower surface of lower installation board 213, and the two ends of lens group fitted tube 212 are fastened on shell fragment 220 and lower shell fragment 230 respectively.Lens group fitted tube 212 is hollow form and both ends open.Particularly, lens group fitted tube 212 is hollow cylindrical.
The surface of upper mounting plate 211 and lower installation board 213 all offers through hole (figure does not mark), and the size of through hole is greater than the external diameter of lens group fitted tube 212, to make lens group fitted tube 212 can in the optical axis direction up/down movement of camera lens module 300.The upper surface of upper mounting plate 211 is also provided with projection 2111, and the contacted inner surfaces of the upper surface of projection 2111 and the sidewall of housing 100 connects.Projection 2111 is in order to locate fixing upper shell fragment 220.The quantity of projection 2111 can be four, and four projections 2111 are distributed in four corners of upper mounting plate 211.
Upper shell fragment 220 offers the first through hole 220a, and the sidewall of the first through hole 220a forms the first elastic arm 221.The diameter of the first through hole 220a can be less than the size of the through hole on upper mounting plate 211.Lower shell fragment 230 comprises two half shell fragments be separated.Lower shell fragment 230 is formed with the second through hole 230a, the sidewall of the second through hole 230a forms the second elastic arm 231.The diameter of the second through hole 230a can be less than the size of the through hole on lower installation board 213.The two ends of lens group fitted tube 212 are fastened on the first elastic arm 221 and the second elastic arm 231, can move up and down to make lens group fitted tube 212 along the direction of optical axis.
Focusing coil 240 is around in the outer peripheral edges of lens group fitted tube 212, and focusing coil 240 is coiled into by a wire, and the two ends of focusing coil 240 are connected on two half shell fragments be separated of lower shell fragment 230.Upper magnet 250 is arranged on the inside surface of the sidewall of housing 100, and relative with focusing coil 240 interval.Specific in present embodiment, the quantity of upper magnet 250 can be four, and four upper magnets 250 are distributed on the inside surface of four sidewalls of housing 100 respectively.
Camera lens module 300 is arranged in lens group fitted tube 212.Particularly, camera lens module 300 comprises lens unit and lens barrel, and lens unit is arranged in lens barrel.Lens group fitted tube 212 is provided with internal thread, and lens barrel is provided with external thread, and lens group fitted tube 212 is assembled by internal thread and external thread mutually with lens barrel.
Stabilization mechanism 400 is contained in housing 100.Particularly, stabilization mechanism 400 comprises guide rod 410, lower magnet 420 and stabilization coil 430.The two ends of guide rod 410 are respectively arranged with spring 440.Lower magnet 420 is arranged at the inside surface of the sidewall of housing 100 and is positioned at the below of upper magnet 250, and lower magnet 420 is relative with stabilization coil 430 interval, and stabilization coil 430 is arranged at the below of lower magnet 420.
Specific in present embodiment, the quantity of guide rod 410 is two right, and be for a pair X-axis guide rod 411, other is for a pair Y-axis guide rod 412.
The quantity of stabilization coil 430 is two right, it is for a pair X-axis stabilization coil 431, other is for a pair Y-axis stabilization coil 432, the side of one of them X-axis stabilization coil 431 is provided with an X-axis hall sensor 450, the side of one of them Y-axis stabilization coil 432 is arranged at Y-axis hall sensor 460, and stabilization mechanism 400 also comprises controller (not shown).X-axis hall sensor 450 or Y-axis hall sensor 460 for detecting magnetic variable quantity and feeding back to controller in jitter compensation process, and controller controls the electric current of X-axis or Y-axis stabilization coil to reach predetermined backoff amount of movement according to magnetic variable quantity.
Specific in present embodiment, stabilization mechanism 400 also comprises gyroscope (not shown), and gyroscope is used for the amount of movement of detector lens assembled pot 212.
Flexible PCB 500 has an installed surface, and stabilization coil 430 is all arranged on installed surface.Carrier 210 is also arranged on flexible PCB 500, and particularly, the bottom of carrier 210 is arranged on the installed surface of flexible PCB 500.Stabilization coil 430 and focusing coil 240 are all electrically connected with flexible PCB 500, are powered by flexible PCB 500.
Base 600 is roughly square, for carrying flexible PCB 500.Particularly, flexible PCB 500 and base 600 all offer circular light hole.Two pairs of stabilization coils 430 are all arranged at around light hole, and a stabilization coil 430 is corresponding with a guide rod 410.
Base 600 projects upwards and forms guide rod installing plate 610, guide rod installing plate 610 offers the first via 611.Particularly, four corners of base 600 arrange orthogonal two guide rod installing plates 610 respectively, two guide rod installing plates 610 on same one side of the corresponding base of each guide rod 410 600, the two ends of guide rod 410 be arranged in respectively base 600 same on guide rod installing plate 610 on the first via 611 in.
Lower installation board 213 projects upwards and is formed with auxiliary positioning wall 2131, auxiliary positioning wall 2131 offers the second via 2132.Second via 2132 is circular hole, and diameter is roughly the same with the external diameter of guide rod 410.Particularly, lower installation board 213 is roughly square, the middle part of the four edges of lower installation board 213 is all given prominence to and is formed with auxiliary positioning wall 2131, the middle part of guide rod 410 is arranged in the second via 2132 on a limit of base 600, the two ends of guide rod 410 are arranged in the first via 2132 on the same limit of base 600 respectively, one end of spring 440 is connected to the lateral wall of guide rod installing plate 610, and the other end is connected to the inside surface of the sidewall of housing 100.
Specific in present embodiment, also comprise optical filter (not shown), optical filter is arranged at the below of camera lens module 300.Optical filter effectively can filter out the Infrared by camera lens module 300, avoids ultrared interference.Particularly, optical filter is cutoff filter.
Above-mentioned camera module 10 at least has the following advantages:
During focusing, focusing coil 240 is powered by flexible PCB 500, because focusing coil 240 is subject to Ampère force effect in the magnetic field that upper magnet 250 produces, the lens group fitted tube 212 making to be wound with focusing coil 240 can along optical axis (Z axis) direction up/down movement, thus drive camera lens module 300 up/down movement be arranged in lens group fitted tube 212, change the distance between camera lens module 300 and image sensor (not shown), realize focus function.When stopping powering to focusing coil 240, lens group fitted tube 212 is sprung back to initial position by upper shell fragment 220, lower shell fragment 230.
When starting anti-trembling function, first the amount of movement of lens group fitted tube 212 in X or Y direction detected by gyroscope, X-axis stabilization coil 431 or Y-axis stabilization coil are powered by flexible PCB 500, the magnetic field that the magnetic field produced due to X-axis stabilization coil 431 or Y-axis stabilization coil 432 and lower magnet 420 produce acts on mutually, the whole carrier 210 of drive like this moves along X-axis or Y direction, moves to realize compensating.Simultaneously, X-axis hall sensor 450 or Y-axis hall sensor 460 for detecting magnetic variable quantity and feeding back to controller in jitter compensation process, and controller controls the electric current of X-axis stabilization coil 431 or Y-axis stabilization coil 432 finally to reach predetermined backoff amount of movement according to magnetic variable quantity.
Such as, gyroscope detects that lens group fitted tube 212 is A at the amount of movement of X-direction, X-axis stabilization coil 431 is powered by flexible PCB 500, the magnetic field that X-axis stabilization coil 431 produces and the effect of lower magnet 420 phase, and so band mobile carrier 210 moves in the X-axis direction Contrary compensation amount of exercise is-A.X-axis hall sensor 450 for detecting magnetic variable quantity and feeding back to controller in jitter compensation process simultaneously, the electric current that controller controls X-axis stabilization coil 431 according to magnetic variable quantity is-A finally to reach predetermined backoff amount of movement, make the central shaft of the optical axis alignment image sensor of camera lens module 300, ensure shooting picture quality.
Same, gyroscope detects that lens group fitted tube 212 is B at the amount of movement of Y direction, Y-axis stabilization coil 432 is powered by flexible PCB 500, X-axis stabilization coil 431 is not powered, the lower magnet 420 phase effect that the magnetic field that Y-axis stabilization coil 432 produces is relative with Y-axis stabilization coil 432, so band mobile carrier 210 is-B along Y direction reversing of motion compensating motion amount.Y-axis hall sensor 460 for detecting magnetic variable quantity and feeding back to controller in jitter compensation process simultaneously, the electric current that controller controls Y-axis stabilization coil 432 according to magnetic variable quantity is-B finally to reach predetermined backoff amount of movement, make the central shaft of the optical axis alignment image sensor of camera lens module 300, ensure shooting picture quality.
When stopping powering to stabilization coil 430, guide rod 410 is sprung back to initial position by the spring 440 at guide rod 410 two ends, and guide rod 410 is with mobile carrier 210 to spring back to initial position.The utility model adopts said structure to realize focusing and anti-trembling function, and structure is simple, and does not adopt suspention line structure, therefore without the need to adopting special material, has saved cost.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.