CN216851722U - Side winding type capacitance distance measurement closed-loop voice coil motor - Google Patents
Side winding type capacitance distance measurement closed-loop voice coil motor Download PDFInfo
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- CN216851722U CN216851722U CN202220691479.8U CN202220691479U CN216851722U CN 216851722 U CN216851722 U CN 216851722U CN 202220691479 U CN202220691479 U CN 202220691479U CN 216851722 U CN216851722 U CN 216851722U
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- 238000005259 measurement Methods 0.000 title description 4
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- 230000001681 protective effect Effects 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 9
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Abstract
The utility model relates to a side is around formula electric capacity range finding closed loop voice coil motor, including protective housing, base, camera lens carrier, shell fragment subassembly, drive assembly and closed-loop control subassembly, its technical essential is: the closed-loop control assembly comprises a detection metal terminal I, a detection metal terminal II and a detection metal terminal III, wherein the detection metal terminal I is arranged on a frame body outside the lens carrier, the detection metal terminal II and the detection metal terminal III are arranged in parallel at intervals, the detection metal terminal II and the detection metal terminal III are fixed on fixing portions of the relative lens carrier, the detection metal terminal II and the detection metal terminal III are arranged at intervals along the direction of an optical axis of the voice coil motor, and the detection metal terminal I, the detection metal terminal II and the detection metal terminal III are respectively provided with projection overlapping surfaces. The utility model discloses a detect metal terminal structure and replace hall sensing element, through the mode of side-mounted overall arrangement, saved the inner space, solved the problem that thrust received the restriction, reduce the component error, improve the focusing precision of focusing.
Description
Technical Field
The utility model relates to a voice coil motor technical field, concretely relates to side is around formula electric capacity range finding closed loop voice coil motor is suitable for optical element such as drive lens to realize focusing and focusing function.
Background
Because a Voice Coil Motor (VCM) has the advantages of simple structure, small size, low energy consumption, no noise, high acceleration, fast response speed, accurate displacement, low price and the like, the automatic focusing function of the Voice Coil Motor is still the scheme with the highest cost performance for the automatic focusing device of the camera at present. The optical lens is fixed on the voice coil motor carrier, the carrier serves as a power unit for lens movement, the voice coil motor carrier is connected with the stator part through the reed, and when the motor is electrified, the carrier linearly moves along the optical axis direction of the lens, so that the automatic focusing and focusing functions are realized.
In this process, voice coil motor adopts closed loop control subassembly feedback carrier displacement volume, and the drive current size that the in good time adjustment corresponds nevertheless has following problem: the current voice coil motor mostly adopts hall sensing element to detect the magnetic field change in the motor to realize the closed loop control purpose, but hall sensing element and rather than the complex magnetite, the arrangement space requirement of coil is great, otherwise can not guarantee enough thrust to the carrier, nevertheless under the condition that reaches the settlement thrust, voice coil motor inside volume can be great relatively, this electronic product that is not conform to using voice coil motor is light gradually, thin, miniaturized design requirement, consequently, current voice coil motor's thrust receives the structure restriction always.
Disclosure of Invention
The utility model aims at providing a structure is more reasonable, use more reliable side around formula electric capacity range finding closed loop voice coil motor, solves the problem that the cooperation structure that current voice coil motor adopted hall sensing element, magnetite and coil leads to receiving the restriction to carrier thrust, has saved the inner space, compares with current voice coil motor, and the thrust increase under the equal volume has strengthened focusing and focusing compensation effect simultaneously.
The technical scheme of the utility model is that:
the utility model provides a side is around formula electric capacity range finding closed loop voice coil motor, includes protective housing, base, locates lens carrier, shell fragment subassembly and the drive assembly in the protection chamber that protective housing and base formed, locates the inside metal material of base and takes group and be used for detecting, feedback and the closed-loop control subassembly of the relative base motion of regulation lens carrier, the drive assembly is including being fixed in coil in the camera lens carrier outside framework, the magnetite that corresponds with the coil, the shell fragment subassembly is including connecting in the lower shell fragment between camera lens carrier and base, connecting in the last shell fragment between camera lens carrier and protective housing, and its technical essential is: the closed-loop control subassembly is including locating detection metal terminal I in the camera lens carrier outside framework, with detection metal terminal II and detection metal terminal III that detect the parallel interval arrangement of metal terminal I, detect metal terminal II and detect the fixed part that metal terminal III is fixed in relative camera lens carrier, detect metal terminal II and detect metal terminal III and follow voice coil motor optical axis direction interval arrangement, it has the projection face of overlapping respectively with detection metal terminal II and detection metal terminal III to detect metal terminal I, be equipped with in the metal material area group and be used for with detection metal terminal I, detect metal terminal II and detect the independent metal material area that metal terminal III is connected, three independent metal material area is drawn forth the base edge and is formed three detected signal end.
Foretell side is around formula electric capacity range finding closed loop voice coil motor, be equipped with in the metal material area group and be used for the signal of telecommunication input material area and the signal of telecommunication output material area to coil conveying current signal, be equipped with in the shell fragment down with the lower shell fragment somatic part portion I of signal of telecommunication input material area electricity even, take the lower shell fragment somatic part II of electricity even with the signal of telecommunication output material, be equipped with two terminals of being connected with the input and the output of coil in the outside framework of camera lens carrier, shell fragment components of a whole that can function independently portion I is equipped with the conductive end of input rather than one of them terminal connection, shell fragment components of a whole that can function independently portion II is equipped with the conductive end of output with another terminal connection down, signal of telecommunication input material area and signal of telecommunication output material area are drawn forth the base edge respectively and are formed signal of telecommunication input end and signal of telecommunication output end.
In the side-winding capacitance ranging closed-loop voice coil motor, the lower spring plate is additionally provided with a lower spring plate split part iii, an independent metal material belt used for being connected with the detection metal terminal I in the metal material belt group is electrically connected with the lower spring plate split part iii, the lens carrier is internally provided with a conductive part connected with the detection metal terminal I, and the lower spring plate split part iii is electrically connected with the conductive part.
The side-winding capacitance ranging closed-loop voice coil motor is characterized in that a grounding material belt is additionally arranged in the metal material belt set, the protective shell is provided with a grounding port, and the grounding end of the grounding material belt is communicated with the protective shell and grounded through the grounding port so as to play a shielding role.
Foretell side is around formula electric capacity range finding closed loop voice coil motor, the quantity of coil is two and utilizes the connecting wire intercommunication, be equipped with the stopper that is used for fixed coil on two opposite faces of camera lens carrier outside framework respectively, the magnetite is fixed in the fixed part of relative camera lens carrier, and its quantity is two sets of and with the coil one-to-one, and every group magnetite constitutes with two magnetite of corresponding coil upper and lower part.
In the side-winding capacitance distance measurement closed-loop voice coil motor, the four corners of the base and the bottom of the lens carrier are respectively provided with the plurality of fixing columns, the lower elastic sheet is provided with the round holes corresponding to the fixing columns, and the lower elastic sheet is fixed with the base and the lens carrier through the fixing columns.
Foretell side is around formula electric capacity range finding closed loop voice coil motor, the base is equipped with the barricade, it is located the barricade to detect metal terminal II and detect metal terminal III, detect metal terminal II and detect the independent metal material area at metal terminal III place and take the part in the barricade to bend the section upwards.
The utility model has the advantages that:
1. the utility model discloses a detect metal terminal structure and replace hall sensing element, solved and to have adopted hall element magnetite and coil to unable the increaseing now, thrust receives the problem of restriction, and the electric capacity polar plate hardly occupies the inner space, and the thrust increase under the equal volume has strengthened the motor simultaneously and has focused and focusing compensation effect.
2. The utility model discloses a detect metal terminal structure and replace hall sensing element, through the mode of side-mounted overall arrangement, carry out the difference signal operation according to the electric charge amount that detects difference on the metal terminal, reduce the component error, improve the focusing precision of focusing.
3. The utility model discloses detect metal terminal structure and set up in motor overall structure's side, save space, the polar plate equipment is simple, and production processes is simple, can take the direct forming of group through the metal material even, and the volume production of being convenient for is processed.
4. The utility model discloses detect the metal terminal and carry out the difference signal operation, can reduce the component error, improve the focusing precision of focusing.
5. The utility model discloses be difficult for receiving the influence of external magnetic field and temperature, thrust is stable.
Drawings
Fig. 1 is a schematic structural view of the present invention (excluding the protective case);
FIG. 2 is a schematic view of the base structure of the present invention;
fig. 3 is a schematic view of the upper spring plate structure of the present invention;
fig. 4 is a schematic structural diagram of the lens carrier of the present invention;
fig. 5 is a schematic diagram of the coil structure of the present invention;
FIG. 6 is a schematic view of the magnet structure of the present invention;
fig. 7 is a schematic view of the structure of the lower spring plate of the present invention;
FIG. 8 is a schematic view of the metal band assembly of the present invention;
fig. 9 is a schematic view of the protective casing of the present invention;
fig. 10 is a schematic structural view of the driving assembly of the present invention;
fig. 11 is a schematic diagram of an assembly structure of the coil, the lower spring plate and the metal band set of the present invention.
In the figure: 1. the lens comprises a base, 11 retaining walls, 12 fixing columns, 2 upper elastic sheets, 3 lens carriers, 31 wiring terminals, 32 limiting blocks, 33 threaded holes, 4 magnets, 5 coils, 51 connecting wires, 6 lower elastic sheets, 61 lower elastic sheet split parts I, 62 lower elastic sheet split parts II, 63 lower elastic sheet split parts III, 64 input conducting ends, 65 output conducting ends, 7 metal material belt groups, 71 detection metal terminals I, 72 detection metal terminals II, 73 detection metal terminals III, 74 electric signal input material belts, 75 independent metal material belts, 76 independent metal material belts, 77 grounding material belts, 78 independent metal material belts, 79 electric signal output material belts, 8 protective cases, 81 grounding ports.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 11, the side-winding type capacitance distance measurement closed-loop voice coil motor includes a protective shell 8, a base 1, a lens carrier 3 disposed in a protective cavity formed by the protective shell 8 and the base 1, a spring assembly and a driving assembly, a metal band assembly 7 disposed inside the base 1, and a closed-loop control assembly for detecting, feeding back, and adjusting the movement of the lens carrier 3 relative to the base 1. The driving assembly includes a coil 5 fixed to the outer frame of the lens carrier 3, and a magnet 4 corresponding to the coil 5. The elastic sheet assembly comprises a lower elastic sheet 6 connected between the lens carrier 3 and the base 1 and an upper elastic sheet 2 connected between the lens carrier 3 and the protective shell 8. The inner wall of the lens carrier 3 is provided with a threaded hole 33 for fixing a camera lens.
The closed-loop control assembly comprises a detection metal terminal I71 arranged on a frame body outside the lens carrier 3, a detection metal terminal II 72 and a detection metal terminal III 73 which are arranged in parallel with the detection metal terminal I71 at intervals. The detection metal terminal II 72 and the detection metal terminal III 73 are fixed on a fixing part opposite to the lens carrier 3, the detection metal terminal II 72 and the detection metal terminal III 73 are arranged at intervals along the optical axis direction of the voice coil motor, and the detection metal terminal I71, the detection metal terminal II 72 and the detection metal terminal III 73 are respectively provided with projection overlapping surfaces. The metal material belt group 7 is provided with independent metal material belts 75, 76 and 78 which are used for being connected with a detection metal terminal I71, a detection metal terminal II 72 and a detection metal terminal III 73, and the three independent metal material belts 75, 76 and 78 are led out of the edge of the base 1 to form three detection signal ends.
In this embodiment, the metal strip group 7 is provided with an electrical signal input strip 74 and an electrical signal output strip 79 for transmitting current signals to the coil 5. The lower elastic piece 6 is internally provided with a lower elastic piece part I61 electrically connected with an electric signal input material belt 74 and a lower elastic piece part II 62 electrically connected with an electric signal output material belt 79, the outer frame of the lens carrier 3 is provided with two binding posts 31 connected with an input end 52 and an output end 53 of the coil 5, the lower elastic piece part I61 is provided with an input conductive end 64 connected with one binding post 31, the lower elastic piece part II 62 is provided with an output conductive end 65 connected with the other binding post 31, and the electric signal input material belt 74 and the electric signal output material belt 79 are respectively led out of the edge of the base 1 to form an electric signal input end and an electric signal output end. The lower spring piece 3 is further provided with a lower spring piece split part 63, an independent metal material belt 75 used for being connected with a detection metal terminal I71 in the metal material belt group 7 is electrically connected with the lower spring piece split part III 63, a conductive part connected with the detection metal terminal I71 is arranged in the lens carrier 3, and the lower spring piece split part III 63 is electrically connected with the conductive part. The metal material belt set 7 is additionally provided with a grounding material belt 77, the protective shell 8 is provided with a grounding port 81, and a grounding end of the grounding material belt 77 is communicated with the protective shell 8 and is grounded through the grounding port 81 so as to play a shielding role. Base 1 is equipped with barricade 11, it is located barricade 11 to detect II 72 of metal terminal and detect III 73 of metal terminal, it is the section of bending upwards to detect the independent metal material area 76, 78 that II and 72 of metal terminal detected III 73 place in barricade 11. In this embodiment, the detection metal terminal I71, the detection metal terminal ii 72, and the detection metal terminal iii 73 are structured as capacitor plates parallel to the optical axis, respectively.
The number of the coils 5 is two and is communicated by using a connecting line 51, and two opposite surfaces of the frame body outside the lens carrier 3 are respectively provided with a limiting block 32 for fixing the coils 5. The magnetite 4 is fixed in the fixed part of relative camera lens carrier 3, like 8 inner walls of protective housing, the magnetite 4 quantity be two sets of and with coil 5 one-to-one, every group magnetite 4 constitutes with two magnetite 4 of corresponding coil 5 upper and lower part. The terminals 31 and the detection metal terminals I71 are located on two opposite surfaces of the outer frame of the lens carrier 3 on different sides from the coil 5.
A plurality of fixing posts 12 are respectively arranged at four corners of the base 1 and the bottom of the lens carrier 3, round holes corresponding to the fixing posts 12 are arranged on the lower elastic sheet 6, and the lower elastic sheet 6 is fixed with the base 1 and the lens carrier 3 through the fixing posts 12.
The working principle is as follows:
the driving current is loaded on the metal material belt group 7, the driving current is input from an electrical signal input end of an electrical signal input material belt 74 and is transmitted to a lower spring plate split part I61 of the lower spring plate 6, then is transmitted to one coil 5 from the lower spring plate split part I61 through an input conductive end 64 and a binding post 31, the current is conducted by the other coil 5 through a connecting wire 51 and is transmitted to a lower spring plate split part II 62 of the lower spring plate 6 through an output conductive end 65 and the other binding post 31, and finally the current is output from an electrical signal output end of an electrical signal output material belt 79 to drive the lens carrier 3 to move along an optical axis in the base 1, so that the focusing function of the motor is realized.
Meanwhile, detection signals are respectively loaded on three detection signal ends, wherein the detection signal of one detection signal end is transmitted to a lower spring plate split part III 63 of the lower spring plate 6 through a corresponding independent metal material strip 75, and then is transmitted to a detection metal terminal I71 through the lower spring plate split part III 63, a second detection signal is transmitted to a detection metal terminal II 72 through a corresponding independent metal material strip 76, a third detection signal is transmitted to a detection metal terminal III 73 through a corresponding independent metal material strip 78, different amounts of electric charge are accumulated in the detection metal terminal I71, the detection metal terminal II 72 and the detection metal terminal III 73 due to the movement of the lens carrier 3, a certain capacitance difference is formed, and after differential signal operation is carried out on external devices respectively connected with the detection metal terminal I71, the detection metal terminal II 72 and the detection metal terminal III 73, feedback signals are respectively sent to respective routes, therefore, the position of the lens carrier 3 and the lens carried on the lens carrier is judged, and the driving current is adjusted again according to the feedback signal, so that the closed-loop focusing function of the motor is realized.
Claims (7)
1. The utility model provides a side is around formula electric capacity range finding closed loop voice coil motor, includes protective housing, base, locates lens carrier, shell fragment subassembly and the drive assembly in the protection chamber that protective housing and base formed, locates the inside metal material of base and takes group and be used for detecting, feedback and the closed-loop control subassembly of the relative base motion of regulation lens carrier, the drive assembly is including being fixed in coil in the camera lens carrier outside framework, the magnetite that corresponds with the coil, the shell fragment subassembly is including connecting the lower shell fragment between camera lens carrier and base, connecting the last shell fragment between camera lens carrier and protective housing, its characterized in that: the closed-loop control subassembly is including locating detection metal terminal I in the camera lens carrier outside framework, with detection metal terminal II and detection metal terminal III that detect the parallel interval arrangement of metal terminal I, detect metal terminal II and detect the fixed part that metal terminal III is fixed in relative camera lens carrier, detect metal terminal II and detect metal terminal III and follow voice coil motor optical axis direction interval arrangement, it has the projection face of overlapping respectively with detection metal terminal II and detection metal terminal III to detect metal terminal I, be equipped with in the metal material area group and be used for with detection metal terminal I, detect metal terminal II and detect the independent metal material area that metal terminal III is connected, three independent metal material area is drawn forth the base edge and is formed three detected signal end.
2. The side-wound capacitive ranging closed-loop voice coil motor of claim 1, wherein: the utility model discloses a lens carrier, including lens carrier, metal material area group, shell fragment part I, shell fragment part II, base edge formation signal of telecommunication input end and signal of telecommunication output end are drawn forth respectively to metal material area group, be equipped with in the shell fragment down with signal of telecommunication input material area electricity lower shell fragment part I, with signal of telecommunication output material area electricity lower shell fragment part II that links, be equipped with in the outside framework of lens carrier with the input of coil and two terminals of output connection, shell fragment part I is equipped with the electrically conductive end of input rather than one of terminal connection down, shell fragment part II is equipped with the electrically conductive end of output with another terminal connection down, signal of telecommunication input material area and signal of telecommunication output material area draw forth the base edge respectively and form signal of telecommunication input end and signal of telecommunication output end.
3. The side-wound capacitive ranging closed-loop voice coil motor of claim 1, wherein: the lens carrier is internally provided with a conductive part connected with the detection metal terminal I, and the lower spring plate split part III is electrically connected with the conductive part.
4. The side-wound capacitive ranging closed-loop voice coil motor of claim 1, wherein: the metal material area group is equipped with the ground connection material area in addition, the protective housing is equipped with the ground connection port, the earthing terminal in ground connection material area and protective housing intercommunication and through ground connection port ground connection to play the shielding effect.
5. The side-wound capacitive ranging closed-loop voice coil motor of claim 1, wherein: the quantity of coil is two and utilizes the connecting wire intercommunication, be equipped with the stopper that is used for fixed coil on two opposite faces of camera lens carrier outside framework respectively, the magnetite is fixed in the fixed part of relative camera lens carrier, and its quantity is two sets of and with the coil one-to-one, every group magnetite and two magnetite of corresponding coil upper and lower part constitute.
6. The side-wound capacitive ranging closed-loop voice coil motor of claim 1, wherein: the lens carrier is characterized in that a plurality of fixing columns are respectively arranged at the four corners of the base and the bottom of the lens carrier, round holes corresponding to the fixing columns are formed in the lower elastic sheet, and the lower elastic sheet is fixed with the base and the lens carrier through the fixing columns.
7. The side-wound capacitive ranging closed-loop voice coil motor of claim 1, wherein: the base is equipped with the barricade, it is located the barricade to detect metal terminal II and detect metal terminal III, detect the independent metal material area at metal terminal II and detect metal terminal III place and take the part in the barricade to be the section of bending upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220691479.8U CN216851722U (en) | 2022-03-28 | 2022-03-28 | Side winding type capacitance distance measurement closed-loop voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220691479.8U CN216851722U (en) | 2022-03-28 | 2022-03-28 | Side winding type capacitance distance measurement closed-loop voice coil motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216851722U true CN216851722U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220691479.8U Active CN216851722U (en) | 2022-03-28 | 2022-03-28 | Side winding type capacitance distance measurement closed-loop voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216851722U (en) |
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2022
- 2022-03-28 CN CN202220691479.8U patent/CN216851722U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Side wound Capacitive Distance Measurement Closed Loop Voice Coil Motor Effective date of registration: 20231228 Granted publication date: 20220628 Pledgee: China Construction Bank Corporation Panjin branch Pledgor: Liaoning Zhonglan Photoelectric Technology Co.,Ltd. Registration number: Y2023210000359 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |