CN113258748A - Voice coil motor with adjustable elasticity and adjusting method thereof - Google Patents
Voice coil motor with adjustable elasticity and adjusting method thereof Download PDFInfo
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- CN113258748A CN113258748A CN202110792622.2A CN202110792622A CN113258748A CN 113258748 A CN113258748 A CN 113258748A CN 202110792622 A CN202110792622 A CN 202110792622A CN 113258748 A CN113258748 A CN 113258748A
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- damping
- spring
- elastic sheet
- locking spring
- voice coil
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
- H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/26—Means for adjusting casings relative to their supports
Abstract
The invention relates to an elasticity-adjustable voice coil motor and an adjusting method thereof, wherein the voice coil motor comprises a base and a shell which are fixedly connected with each other, a lens carrier embedded between the base and the shell, an upper elastic sheet positioned on the upper end surface of the lens carrier and a lower elastic sheet positioned on the lower end surface of the lens carrier, a coil wound on the outer ring of the lens carrier and magnets uniformly distributed in the circumferential direction of the coil, a plurality of buffer components are loaded on the surface of the base, each buffer component is matched with one magnet, the magnets are pressed on the buffer components, and the lower elastic sheet is clamped in the buffer components, wherein the buffer components are suitable for adjusting the pressing force of the upper end surface and the lower end surface of the lower elastic sheet. According to the voice coil motor, the up-and-down adjustment effect of the voice coil motor is realized through the mutually matched base, the shell, the lens carrier, the upper elastic sheet, the lower elastic sheet and the magnet; through the setting of buffering subassembly, adjust the pressure of buffering subassembly in order to adjust the upper and lower surface of lower shell fragment, adjust the deformation elasticity of shell fragment down for the shell fragment provides the deformation elasticity of a good damping sense down to prolong holistic life.
Description
Technical Field
The invention relates to a voice coil motor, in particular to a voice coil motor with adjustable elasticity and an adjusting method thereof.
Background
CN201620477088.0, discloses a voice coil motor, which comprises a shell and a base connected with the shell, wherein the upper end surface of the shell is provided with a central through hole, a lens carrier is arranged in the central through hole, 4 corners of the shell are provided with triangular platforms, an outer frame of an upper elastic sheet is arranged on the triangular platform, and an inner ring of the upper elastic sheet is arranged at the top end of the lens carrier; the outer frame of the lower elastic sheet is arranged on the base, and the inner ring of the lower elastic sheet is arranged at the bottom end of the lens carrier; the base is provided with a plurality of reinforcing ribs, and the reinforcing ribs correspond to the positioning table at the bottom end of the lens carrier; two adjacent corners of the base are respectively provided with a pin in an integrated manner; the utility model has the advantages of simple structure bears higher working strength, and imaging quality is good.
The voice coil motor has the following disadvantages:
1. in the process of adjusting the lens, when the lower elastic sheet generates a pulling force, the lower elastic sheet and the magnet are in hard collision; damage to the magnet is easily caused;
2. the folded position of the lower spring plate can be damaged after long-term use.
Disclosure of Invention
The invention aims to provide a voice coil motor with adjustable elasticity.
In order to solve the technical problem, the invention provides a voice coil motor with adjustable elasticity, which comprises a base and a shell which are fixedly connected with each other, a lens carrier embedded between the base and the shell, an upper elastic sheet positioned on the upper end surface of the lens carrier, a lower elastic sheet positioned on the lower end surface of the lens carrier, a coil wound on the outer ring of the lens carrier and magnets uniformly distributed in the circumferential direction of the coil,
the surface of the base is provided with a plurality of buffer components, each buffer component is matched with one magnet, the magnets are pressed on the buffer components, the lower elastic sheet is clamped in the buffer components, and the upper elastic sheet is arranged in the buffer components
The buffer assembly is suitable for adjusting the pressing force of the upper end face and the lower end face of the lower elastic sheet.
Preferably, the cushion assembly includes an upper damping portion, a lower damping portion and an adjustment portion; and
the lower elastic sheet is positioned between the upper damping part and the lower damping part, wherein
The adjusting portion is adapted to adjust a damping value of the lower damping portion.
Preferably, the upper damping part comprises an upper damping column clamped at the bottom of the magnet and an upper damping spring sleeved on the upper damping column; the lower damping part comprises a lower damping spring; the adjusting part comprises a lower damping column which is in threaded connection with the base, and a sleeve ring is sleeved on the side wall of the lower damping column; and
the bottom of the upper damping column is provided with a damping hole, the lower damping column is in threaded connection/insertion connection with the damping hole, the lower damping spring is sleeved on the lower damping column, the lower end of the lower damping spring abuts against the lantern ring, the lower elastic sheet is sleeved on the upper damping column, and the upper damping column is provided with a damping hole, a lower damping spring is sleeved on the lower damping column, a lower elastic sheet is sleeved on the upper damping column, and the damping hole is formed in the lower damping column
The lower elastic sheet is clamped between the upper damping spring and the lower damping spring.
Preferably, two polygonal clamping grooves are formed in the bottom of the magnet, the upper damping column is provided with two polygonal end heads, and the polygonal end heads are clamped in the polygonal clamping grooves.
Preferably, each corner of the outer shell forms a step pressing platform, and the projection surface of the step pressing platform in the vertical direction comprises a plurality of polygonal ends
Preferably, the two polygonal ends are jointed to form a sector ring plate, and the two polygonal clamping grooves are jointed to form a sector ring groove; the fan ring plate is clamped in the fan ring groove, an
In the vertical direction, the fan ring groove is overlapped with the projection surface of the step pressing platform.
Preferably, the lower spring plate comprises an annular body and locking parts uniformly distributed in the circumferential direction of the annular body;
the lock catch part comprises a lock catch head, a first lock catch spring, a second lock catch spring and a third lock catch spring;
the first locking spring, the second locking spring and the third locking spring are respectively and integrally arranged with the annular body to form a first positioning point, a second positioning point and a third positioning point;
the radian formed between the first positioning point and the second positioning point is 15 degrees, and the radian formed between the second positioning point and the third positioning point is 15 degrees;
one ends of the first lock catch spring, the second lock catch spring and the third lock catch spring are integrally arranged with the lock catch head, two sleeve joint holes are formed in the lock catch head, and the lock catch head is sleeved on the upper damping portion through the sleeve joint holes.
Preferably, the first locking spring is U-shaped, the U-shaped end of the first locking spring is fixed to the locking head near one of the sleeving holes, and the U-shaped root of the first locking spring is fixed to the annular body;
the second locking spring is W-shaped, one W-shaped end part of the second locking spring is fixed on the annular body, and the other W-shaped end part of the second locking spring is fixed on the locking head at the other sleeving connection hole;
the third locking spring is in a shape of a straight line, one straight end of the third locking spring is fixed on the annular body, and the other straight end of the third locking spring is fixed on the locking head close to the W-shaped end; and
the W-shaped root of the second locking spring is close to the third locking spring, and the W-shaped tip of the second locking spring extends to one side of the first locking spring.
The invention has the following beneficial effects:
(1) according to the voice coil motor, the up-and-down adjustment effect of the voice coil motor is realized through the mutually matched base, the shell, the lens carrier, the upper elastic sheet, the lower elastic sheet and the magnet;
(2) according to the invention, through the arrangement of the buffer assembly, the buffer assembly is adjusted to adjust the pressure of the upper surface and the lower surface of the lower elastic sheet, so that a good damping feeling is provided for the lower elastic sheet, and meanwhile, the deformation elasticity of the lower elastic sheet is adjusted, thereby prolonging the service life of the whole body.
The invention also provides an adjusting method of the voice coil motor, and the lower damping column is rotated relative to the base to realize height adjustment of the lower damping column relative to the base.
The elastic adjusting device has the advantages that the operation method is simple and rapid, and the elastic adjustment of the lower elastic sheet is well realized.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic cross-sectional view of a voice coil motor with adjustable spring force according to a preferred embodiment of the present invention;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is a schematic structural view of a preferred embodiment of the base and upper damping portion of the present invention;
fig. 4 is a schematic structural view of a preferred embodiment of the lower elastic sheet of the present invention;
FIG. 5 is a top view of a preferred embodiment of the upper damping post of the present invention;
FIG. 6 is a schematic structural view of a preferred embodiment of the first locking spring of the present invention;
FIG. 7 is a schematic structural view of a preferred embodiment of a secondary lock spring of the present invention;
FIG. 8 is a schematic structural view of a preferred embodiment of a third locking spring of the present invention;
FIG. 9 is an exploded view of a preferred embodiment of the cushioning assembly of the present invention;
FIG. 10 is a schematic view showing a structure of a preferred embodiment of a magnet according to the present invention;
in the figure:
a base 100;
a housing 200, a stepped platen 210;
a lens carrier 300;
an upper spring plate 400;
the spring clip comprises a lower spring plate 500, an annular body 510, a locking part 520, a locking head 521, a sleeving hole 5211, a first locking spring 522, a U-shaped end 5221, a U-shaped root 5222, a second locking spring 523, a W-shaped end 5231, a W-shaped root 5232, a W-shaped tip 5233, a third locking spring 524 and a first end 5241;
a magnet 600, a fan ring groove 610;
the damping device comprises a buffering component 700, an upper damping part 710, an upper damping column 711, a damping hole 711-1, an upper damping spring 712, a polygonal end 713, a fan-shaped ring plate 714, a lower damping part 720, a lower damping spring 721, an adjusting part 730, a lower damping column 731 and a sleeve ring 732.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the prior art, most voice coil motors are in hard impact with the magnet 600 when the lower elastic sheet 500 generates a pulling force in the process of lens adjustment, so that the magnet 600 is easily damaged; and the folded position of the lower elastic sheet 500 may be damaged in long-term use, in order to solve the above technical problems, the following technical solutions are adopted.
Example one
As shown in fig. 1 to 10, in order to realize the function of adjustable elasticity, the invention provides a voice coil motor with adjustable elasticity, which includes a base 100 and a housing 200 fixedly connected to each other, wherein the base 100 and the housing 200 are embedded with each other to form a main body of the voice coil motor with adjustable elasticity, which plays a role of bearing and supporting other devices inside the voice coil motor with adjustable elasticity, and plays a good role of supporting and bearing; the voice coil motor with adjustable elasticity further comprises a lens carrier 300 embedded between the base 100 and the shell 200, an upper elastic sheet 400 positioned on the upper end face of the lens carrier 300, a lower elastic sheet 500 positioned on the lower end face of the lens carrier 300, a coil wound on the outer ring of the lens carrier 300 and magnets 600 uniformly distributed in the circumferential direction of the coil, wherein the magnets 600 are in a trapezoidal column shape, the shape of the magnets 600 is matched with that of the shell 200 and the base 100, so that the magnets 600 are stably arranged in the shell 200 and the base 100, and the magnetic induction lines of the lens carrier 300 can be cut under the surrounding of the coil; the lens carrier 300 performs repeated up-and-down movement between the base 100 and the housing 200, and the lens carrier 300 performs up-and-down movement through the coils wound around the outer ring of the lens carrier 300 and the magnets 600 uniformly distributed in the circumferential direction of the coils, thereby realizing cutting of the magnetic induction lines; and enabling the lens carrier 300 to have restoring force by the upper spring 400 located at the upper end surface of the lens carrier 300 and the lower spring 500 located at the lower end surface of the lens carrier 300, so that the lens carrier 300 can continuously perform the up-and-down cutting magnetic induction line movement between the base 100 and the housing 200.
In order to avoid that the magnet 600 is easily damaged when the lower elastic sheet 500 generates a pulling force and the magnet 600 is in hard impact with the lower elastic sheet in the lens adjusting process of most voice coil motors; and under long-term use, the folding position of the lower elastic sheet 500 will be damaged and unable to recover, therefore, the surface of the base 100 bears a plurality of buffer components 700, the buffer components 700 are suitable for adjusting the pressing force of the upper and lower end surfaces of the lower elastic sheet 500, and each buffer component 700 is adapted with a magnet 600, the magnet 600 presses the buffer component 700, the lower elastic sheet 500 is clamped in the buffer component 700; the buffer assembly 700 effectively improves the adjusting performance of the device and prolongs the service life of the equipment in the lens adjusting process of the voice coil motor.
Wherein the buffering assembly 700 includes an upper damping portion 710, a lower damping portion 720, and an adjusting portion 730; and the lower spring 500 is located between the upper damping part 710 and the lower damping part 720, wherein the adjusting part 730 is adapted to adjust the damping value of the lower damping part 720. In the process of cutting the magnetic induction lines, the voice coil motor keeps the lens carrier 300 in a fixed area all the time to move up and down through the upper damping part 710 and the lower damping part 720, the upper damping part 710 and the lower damping part 720 are respectively used for pushing and pulling the lower elastic sheet 500, and the phenomenon that the same spring is used for pushing and pulling the lower elastic sheet 500 at the same time is avoided; through the arrangement of the upper damping part 710 and the lower damping part 720, the lower elastic sheet 500 is well buffered in the bending process and the bending recovery process, the service life of the spring is further prolonged, and the service life of the equipment is further prolonged; after shell fragment 500 used repeatedly many times down for shell fragment 500 takes place the deformation back that can't resume down, adjusts the elasticity of damping part 720 down through regulating part 730, with the elasticity reinforcing of shell fragment 500 down, makes shell fragment 500 can continue to resume into original state and initial position down, reduces the irreversible deformation that shell fragment 500 took place down and produces the influence to equipment, and the life of extension equipment.
Therefore, the upper damping part 710 and the lower damping part 720 play a crucial role in integrally adjusting the elastic force, wherein the upper damping part 710 comprises an upper damping column 711 clamped at the bottom of the magnet 600 and an upper damping spring 712 sleeved on the upper damping column 711; meanwhile, the lower damping portion 720 includes a lower damping spring 721; and the adjusting part 730 comprises a lower damping column 731 screwed on the base 100, and a collar 732 is sleeved on the side wall of the lower damping column 731; the lantern ring 732 is positioned at the bottom of the lower damping column 731, and the lower damping spring 721 props against the lantern ring 732, so that the lower damping spring 721 stretches between the lantern ring 732 and the lower spring sheet 500; and the bottom of the upper damping column 711 is provided with a damping hole 711-1, the lower damping column 731 is screwed/plugged in the damping hole 711-1, the lower damping spring 721 is sleeved on the lower damping column 731, the lower end of the lower damping spring 721 is propped against the lantern ring 732, the lower spring plate 500 is sleeved on the upper damping column 711, and the lower spring plate 500 is clamped between the upper damping spring 712 and the lower damping spring 721. The upper damping spring 712 is always in a compressed state, so that the upper damping spring 712 always gives an upward elastic force, and at the moment, the magnet 600 is influenced by the upward elastic force, so that the magnet 600 is limited by the stepped pressing table 210 to be pressed; the lower elastic sheet 500 is arranged between the upper damping part 710 and the lower damping part 720, the lens carrier 300 is always kept in a fixed area to move up and down, the upper damping part 710 and the lower damping part 720 are respectively used for pushing and pulling the lower elastic sheet 500, the situation that the same spring is used for pushing and pulling the lower elastic sheet 500 is avoided, the service life of the spring is further prolonged, and the service life of equipment is further prolonged; the lower damping column 731 is in threaded connection/insertion connection with the damping hole 711-1, the damping value of the lower damping part 720 is adjusted by adjusting the adjusting part 730, so that the lower damping column 731 is further embedded into the damping hole 711-1, the lower damping spring 721 is further compressed, the elasticity of the lower damping spring 721 is increased, the restoring force of the lower damping spring 721 is increased, the lower elastic sheet 500 is reset, and the service life of the device is prolonged. The influence of the change of the elastic force of the lower damping spring 721 on the up-and-down cutting motion of the lower elastic sheet 500 by adjusting the adjusting part 730 is shown in the following table 1-1:
TABLE 1-1
| Number of adjusting turns (circle) | Number of uses (times) |
| 0 | 30.12 ten thousand |
| 3 | 32.71 ten thousand |
| 5 | 33.32 ten thousand |
As can be seen from the above table, when the adjusting portion 730 performs the knob adjustment on the lower damping portion 720, the more the number of times of adjustment, the more the lens carrier 300 can cut the magnetic induction lines up and down, and therefore, the longer the service life of the device can be prolonged by adjusting the damping value of the lower damping portion 720.
After the damping value of the lower damping part 720 is adjusted, the positioning effect of the upper damping part 710 needs to be considered, if the positioning effect of the upper damping part 710 is poor, the lower elastic sheet 500 and the magnet 600 are deviated, so that the voice coil motor has poor effect and even cannot work, and therefore good positioning of the upper damping part 710 needs to be achieved, two polygonal clamping grooves are formed in the bottom of the magnet 600, the upper damping column 711 has two polygonal end heads 713, and the polygonal end heads 713 are clamped in the polygonal clamping grooves; the arrangement of the polygonal clamping groove and the polygonal end 713 ensures that the lower damping column 731 cannot be driven to rotate while the lower damping column 731 is rotated in the process of adjusting the lower damping column 731 by the adjusting part 730, and further the polygonal end 713 and the magnet 600 cannot be rotated; the polygonal end 713 of the upper damping column 711 is clamped in the polygonal clamping groove of the magnet 600; in order to improve the stability of the magnet 600 and avoid the displacement of the magnet 600 due to unstable gravity center in the process of cutting the magnetic induction lines up and down on the lens carrier 300, a step pressing platform 210 is formed at each corner of the shell 200, and the projection surface of the step pressing platform 210 in the vertical direction comprises a plurality of polygonal end parts 713, so that when the polygonal end parts 713 move up and down, the magnet 600 is pushed, and the upper end surface of the magnet 600 is attached to the lower bottom surface of the step pressing platform 210, so that the magnet 600 is balanced up and down; in order to further improve the good positioning and working stability of the upper damping portion 710, the two polygonal ends 713 are joined to form a fan ring plate 714, and the two polygonal clamping grooves are joined to form a fan ring groove 610; the fan ring plate 714 is clamped in the fan ring groove 610, and in the vertical direction, the fan ring groove 610 is overlapped with the projection plane of the stepped pressing table 210; in the process that the lower damping column 731 is adjusted by the adjusting portion 730, the upper damping column 711, the fan-ring plate 714 and the magnet 600 are not driven to rotate while the lower damping column 731 rotates; the opening of the fan ring plate 714 faces inwards, so that the fan ring groove 610 at the bottom of the magnet 600 matched with the fan ring plate 714 also faces inwards, the fan ring plate 714 in the shape is stronger in stability than the two polygonal ends 713, a better supporting effect is achieved, meanwhile, the opening faces inwards, the supporting effect of the periphery of the magnet 600 is better, the fan ring plate 714 is pushed to push the magnet 600 when moving up and down, the upper end face of the magnet 600 is attached to the lower bottom face of the stepped pressing table 210, the magnet 600 is balanced up and down, the deviation accident of the magnet 600 is further reduced, and the service life of the whole device is prolonged.
The arrangement of the lower spring 500 is also particularly important, the lower spring 500 is a main reason that the lens carrier 300 can cut the magnetic induction lines up and down, because the arrangement of the lower spring 500 causes the lens carrier 300 to move up and down, elastic deformation is carried out through a part of the area of the lower spring 500, and then resetting is carried out to drive the lens carrier 300 to reset, thus the lens carrier moves repeatedly; the lower spring 500 includes a ring-shaped body 510 and locking portions 520 uniformly arranged in the circumferential direction of the ring-shaped body 510; the locking part 520 includes a locking head 521, a first locking spring 522, a second locking spring 523 and a third locking spring 524; the first locking spring 522, the second locking spring 523 and the third locking spring 524 are respectively integrally arranged with the annular body 510 to form a first positioning point, a second positioning point and a third positioning point; the radian formed between the first positioning point and the second positioning point is 15 degrees, and the radian formed between the second positioning point and the third positioning point is 15 degrees; one end of the first locking spring 522, the second locking spring 523 and the third locking spring 524 is integrally disposed with the locking head 521, two sleeving holes 5211 are formed in the locking head 521, and the locking head 521 is sleeved on the upper damping portion 710 through the sleeving holes 5211. The ends of the first locking spring 522, the second locking spring 523 and the third locking spring 524 are disposed at the positions closest to the sleeving hole 5211, so that when the adjusting part 730 adjusts the lower damping part 720, the formed elastic force acts on the first locking spring 522, the second locking spring 523 and the third locking spring 524 more directly, so that the formed elastic force acts on the first locking spring 522, the second locking spring 523 and the third locking spring 524 as much as possible, and the component force of the elastic force on the locking head 521 is reduced; the influence of the radian formed between the three positioning points on the up-and-down cutting motion of the lower spring 500 is shown in the following tables 1-2:
tables 1 to 2
As can be seen from the experimental data in table 1-2, the radian between the three positioning points is continuously increased, and the service life of the device is optimal when the peak value is 15 °, so that the radian between the three positioning points is 15 °, and the purpose of using the radian between the three positioning points is to apply more formed elastic force to the annular body 510 as much as possible, thereby avoiding the accident that the device is deviated due to the inconsistent force components at the left and right ends, and finally prolonging the service life of the whole device.
The shapes of the first locking spring 522, the second locking spring 523 and the third locking spring 524 are different, the first locking spring 522 is U-shaped, a U-shaped end 5221 of the first locking spring 522 is fixed on the locking head 521 near the sleeving hole 5211, and a U-shaped root 5222 of the first locking spring 522 is fixed on the annular body 510; the second locking spring 523 is W-shaped, one W-shaped end 5231 of the second locking spring 523 is fixed on the annular body 510, and the other W-shaped end 5231 is fixed on the locking head 521 at the other sleeving hole 5211; the third locking spring 524 is in a "one" shape, one first-shaped end 5241 of the third locking spring 524 is fixed on the ring-shaped body 510, and the other first-shaped end 5241 is fixed on the locking head 521 near the W-shaped end 5231; the W-shaped root 5232 of the second locking spring 523 is close to the third locking spring 524, and the W-shaped tip 5233 of the second locking spring 523 extends to one side of the first locking spring 522; the first locking spring 522, the second locking spring 523 and the third locking spring 524 are arranged in a U-shaped W shape and a I shape, and meanwhile, a W-shaped tip 5233 of the second locking spring 523 extends to one side of the first locking spring 522, so that the purpose is to ensure that the component force of the elastic force generated by the lower damping spring 721 on the left end and the component force of the elastic force generated by the lower damping spring on the right end are consistent as much as possible, so that the left end and the right end are stressed more balanced, more formed elastic force acts on the lower elastic sheet 500 as much as possible, further, the accident that the component force of the left end and the component force of the right end are inconsistent and the equipment is deviated is avoided, and the service life of the whole equipment is prolonged; and the first locking spring 522, the second locking spring 523 and the third locking spring 524 are respectively connected with the annular body 510 and the locking head 521, so that the connection stability and strength between devices are improved, and the extension effect and service life of each spring are prolonged.
In summary, the working principle of the present embodiment is as follows:
the height of the lower damping column 731 in the buffering assembly 700 is changed relative to the base 100 by twisting the portion of the lower damping column 731 exposed outside the base 100, and the lower damping column 731 is further inserted into the damping hole 711-1 along the thread, so that the lower damping spring 721 is further compressed, and the lower damping spring 721 gives an upward elastic force to the lower spring 500; therefore, when the lens carrier 300 performs the up-and-down cutting magnetic induction line motion, a good damping effect is provided for the lower elastic sheet 500, and the process of restoring the reset is smooth, so that the service life of the lower elastic sheet 500 is prolonged, and the service life of the whole voice coil motor is finally prolonged.
Example two
The second embodiment is carried out on the basis of the first embodiment.
S1, the lower damping column 731 is rotated relative to the base 100 to effect height adjustment thereof relative to the base 100.
The height of the base 100 is changed by adjusting the lower damping column 731, and the lower damping spring 721 is compressed, so that the elastic force formed between the lower damping spring 721 and the lower spring 500 is increased.
The working method of the voice coil motor is simple and rapid in operation method, elastic adjustment of the lower elastic sheet 500 is well achieved, the service life of the lower elastic sheet 500 is prolonged, cost is reduced, and economic benefits are improved.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A voice coil motor with adjustable elasticity comprises a base and a shell which are fixedly connected with each other, a lens carrier embedded between the base and the shell, an upper elastic sheet positioned on the upper end surface of the lens carrier, a lower elastic sheet positioned on the lower end surface of the lens carrier, a coil wound on the outer ring of the lens carrier and magnets uniformly distributed in the circumferential direction of the coil,
the surface of the base is provided with a plurality of buffer components, each buffer component is matched with one magnet, the magnets are pressed on the buffer components, the lower elastic sheet is clamped in the buffer components, and the upper elastic sheet is arranged in the buffer components
The buffer assembly is suitable for adjusting the pressing force of the upper end face and the lower end face of the lower elastic sheet.
2. The voice coil motor with adjustable elastic force of claim 1,
the buffer assembly comprises an upper damping part, a lower damping part and an adjusting part; and
the lower elastic sheet is positioned between the upper damping part and the lower damping part, wherein
The adjusting portion is adapted to adjust a damping value of the lower damping portion.
3. The voice coil motor with adjustable elastic force of claim 2,
the upper damping part comprises an upper damping column clamped at the bottom of the magnet and an upper damping spring sleeved on the upper damping column; the lower damping part comprises a lower damping spring; the adjusting part comprises a lower damping column which is in threaded connection with the base, and a sleeve ring is sleeved on the side wall of the lower damping column; and
the bottom of the upper damping column is provided with a damping hole, the lower damping column is in threaded connection/insertion connection with the damping hole, the lower damping spring is sleeved on the lower damping column, the lower end of the lower damping spring abuts against the lantern ring, the lower elastic sheet is sleeved on the upper damping column, and the upper damping column is provided with a damping hole, a lower damping spring is sleeved on the lower damping column, a lower elastic sheet is sleeved on the upper damping column, and the damping hole is formed in the lower damping column
The lower elastic sheet is clamped between the upper damping spring and the lower damping spring.
4. The voice coil motor with adjustable elastic force of claim 3,
two polygon draw-in grooves have been seted up to the bottom of magnetite, it has two polygon ends to go up the damping post, the polygon end card is established in the polygon draw-in groove.
5. The voice coil motor with adjustable elastic force of claim 4,
each corner of the shell forms a step pressing platform, and the projection surface of the step pressing platform in the vertical direction comprises a plurality of polygonal end heads.
6. The voice coil motor with adjustable elastic force of claim 5,
the two polygonal end heads are jointed to form a sector ring plate, and the two polygonal clamping grooves are jointed to form a sector ring groove; the fan ring plate is clamped in the fan ring groove, an
In the vertical direction, the fan ring groove is overlapped with the projection surface of the step pressing platform.
7. The voice coil motor with adjustable elastic force of claim 6,
the lower elastic sheet comprises an annular body and locking parts uniformly distributed in the circumferential direction of the annular body;
the lock catch part comprises a lock catch head, a first lock catch spring, a second lock catch spring and a third lock catch spring;
the first locking spring, the second locking spring and the third locking spring are respectively and integrally arranged with the annular body to form a first positioning point, a second positioning point and a third positioning point;
the radian formed between the first positioning point and the second positioning point is 15 degrees, and the radian formed between the second positioning point and the third positioning point is 15 degrees;
one ends of the first lock catch spring, the second lock catch spring and the third lock catch spring are integrally arranged with the lock catch head, two sleeve joint holes are formed in the lock catch head, and the lock catch head is sleeved on the upper damping portion through the sleeve joint holes.
8. The voice coil motor with adjustable elastic force of claim 7,
the first locking spring is U-shaped, the U-shaped end part of the first locking spring is fixed on the locking head close to the sleeving hole, and the U-shaped root part of the first locking spring is fixed on the annular body;
the second locking spring is W-shaped, one W-shaped end part of the second locking spring is fixed on the annular body, and the other W-shaped end part of the second locking spring is fixed on the locking head at the other sleeving connection hole;
the third locking spring is in a shape of a straight line, one straight end of the third locking spring is fixed on the annular body, and the other straight end of the third locking spring is fixed on the locking head close to the W-shaped end; and
the W-shaped root of the second locking spring is close to the third locking spring, and the W-shaped tip of the second locking spring extends to one side of the first locking spring.
9. A method of adjusting a voice coil motor according to claim 3,
and S1, rotating the lower damping column relative to the base to realize the height adjustment of the lower damping column relative to the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009100595A (en) * | 2007-10-18 | 2009-05-07 | Hongyou Science & Technol Co Ltd | Leaf spring and voice coil motor using it |
| CN102394548A (en) * | 2011-09-22 | 2012-03-28 | 北京航空航天大学 | Voice coil vibration isolating/vibration suppressing structure and control method thereof |
| CN206411316U (en) * | 2016-12-29 | 2017-08-15 | 维沃移动通信有限公司 | A kind of camera module and mobile terminal |
| CN213425935U (en) * | 2020-11-11 | 2021-06-11 | 辽宁中蓝光电科技有限公司 | Voice coil motor bottom impact limiting buffer structure |
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2021
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009100595A (en) * | 2007-10-18 | 2009-05-07 | Hongyou Science & Technol Co Ltd | Leaf spring and voice coil motor using it |
| CN102394548A (en) * | 2011-09-22 | 2012-03-28 | 北京航空航天大学 | Voice coil vibration isolating/vibration suppressing structure and control method thereof |
| CN206411316U (en) * | 2016-12-29 | 2017-08-15 | 维沃移动通信有限公司 | A kind of camera module and mobile terminal |
| CN213425935U (en) * | 2020-11-11 | 2021-06-11 | 辽宁中蓝光电科技有限公司 | Voice coil motor bottom impact limiting buffer structure |
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