CN111130244A - Brand-new VCM motor coil direct winding base structure - Google Patents

Abstract

The application discloses brand-new VCM motor coil directly winds base structure, include the base through injection moulding, the base is close to four corners position on be provided with the VCM motor in four corresponding straight columns of permanent magnet, four directly wind and equally divide on the column and do not be provided with the coil of mutual intercommunication, copper line of connecting between two adjacent coils with predetermine respectively on the base and lie in the contact of coil both sides, copper line between two adjacent coils is fixed through the fixed edges and strips that set up on the base. The problems that the VCM motor in the industry is always puzzled are solved, the assembly efficiency is complex, the labor cost is high, the efficiency is low, the reliability is low and the like.

Description

Brand-new VCM motor coil direct winding base structure

Technical Field

The invention relates to the field of VCM motors, in particular to a VCM motor base, and particularly relates to a brand new VCM motor coil direct winding base structure.

Background

The VCM motor is an important component for focusing and anti-shaking of the camera. Because the operation principle is similar to that of a loudspeaker, the voice coil motor is also named in the industry. The main principle of the voice coil motor is that in a permanent magnetic field, the extension position of a spring piece is controlled by changing the direct current of a coil in the motor, so that the spring piece is driven to move up and down. The VCM is widely used by the mobile phone camera to realize the automatic focusing function, and the position of the lens can be adjusted through the VCM to present clear images.

Although the existing voice coil motors have different product structures or names based on different manufacturers, they generally include the following components: the casing is used for fixing, installing and protecting the external physical structure of the voice coil motor and is usually made of metal materials. The support for realize the camera lens and realize the anti-shake effect at the level radial direction's removal promptly, be connected with the base through shell fragment or accurate reed usually. The front reed is used for bearing a carrier and balancing moment, and part of the voice coil motor is also used for conducting electricity, so that resilience force is provided for circumferential movement of focusing of the lens, and the front reed is usually matched with the rear reed to play a role.

Permanent magnets, which produce a permanent magnetic field, typically interact with a coil to provide a modulating effect. And the coil is electrified to generate driving torque and is matched with the magnetic field generated by the permanent magnet. And the carrier is used for mounting and carrying the lens. And the rear spring is used for bearing the carrier and is matched with the front yellow sheet or the front spring to work to generate a balance moment. And the base is used for fixing the components and providing a circuit for supplying power to the anti-shake coil and the focusing coil arranged in the lens carrier.

At present, coil and other parts are fixed and electrified in limited space, and the coil and the other parts can only be fixed through dispensing and baking operation, and for ensuring the electrification between the coil and the parts, the wire head needs to be placed in a corresponding area for welding during welding, and the following defect problems exist in the operation process:

1. the coil is before the equipment, and the operation is glued to the point need be carried out to the equipment position, toasts the operation again after need increasing the tool and fix for preventing the coil skew, toasts for a long time, has increased equipment and tool input cost like this, and is inefficient, and fixed effect also can receive board and manual work influence.

2. When carrying out welding operation after toasting and accomplishing, need artifically put the end of a thread in corresponding welding position before the welding, lead to welding position inconsistent, increase the operation degree of difficulty, need artifically get rid of the end of a thread and can not realize the machine operation after the welding is accomplished, reduced the operating efficiency like this, there is the skew in welding point position, can take place to weld bad phenomenon and cause the material extravagant, has increased material cost and cost of labor like this.

3. The curing effect of the glue can also directly influence the reliability of the product; since the VCM motor is a precision instrument, it is very small, and any errors caused by improper installation or operation may affect the final adjustment imaging of the VCM motor. Therefore, it is very important to provide a base which reduces the installation difficulty, reduces the number of operating posts, improves the efficiency, and improves the reliability of coil installation for the reliability and stability of the whole VCM motor.

Disclosure of Invention

The application provides a brand-new VCM motor coil directly winds base structure for the packaging efficiency who solves the VCM motor of puzzlement industry all the time is loaded down with trivial details, and the cost of labor is high, and is inefficient, the low scheduling problem of reliability. The coil that current VCM motor is used for optics anti-shake usually has four, and the mounted position all sets up the position at four angles of base or the position on four limits then, prior art installation coil need be installed one by one, but in order to guarantee the accurate nature of installation, avoid the coil to warp because of receiving external force in the installation, it is unreliable to lead to the fact follow-up VCM work to incline etc. it realizes fixing in advance the coil to adopt the point mode of gluing more, because the point is glued and can not directly realize fixed purpose, so still need further heat the baking to the coil, make the glue solidification reach the fixed coil effect through toasting. Meanwhile, other tools are required to be adopted to carry out consistency fixation on the coil in the baking process, and the coil after forming is prevented from deforming and cannot be accurately installed. Four coils just need install four times repeatedly, every coil of installing of prior art just need weld the copper line end of two coils, because the coil is very little, in welding process, need artificial copper line end with the coil be used for the electrically conductive contact alignment of coil on with the base, this point is very big to operating personnel's the degree of difficulty, it is very high to operating personnel's technical operation requirement, it will cause the welding skew to have a little poor pond, influence electrically conductive, even weld and break and scrap, and this technology at present can't realize automaticly always. Therefore, the existing base structure is difficult to operate, low in efficiency and precision, and high in finished product processing cost.

The base structure that adopts this application stability is good, the processing degree of difficulty is low, production efficiency is high, lower to operating personnel's technical level requirement, and the precision is more controllable, and can realize automatic operation. The method is obviously superior to the prior art in both technical realization angle and technical effect.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the utility model provides a brand-new VCM motor coil directly winds base structure, includes the base through injection moulding, the base is close to four corner position and is provided with four corresponding straight columns of winding of four permanent magnets in with the VCM motor, four it divide equally on the column and do not is provided with the coil of mutual intercommunication to directly wind, the copper line of connecting between two adjacent coils with predetermine respectively on the base and lie in the contact of coil both sides, the copper line between two adjacent coils is fixed or the point is glued fixedly through fixed arris strip that sets up on the base.

For better fixing the coils, and simultaneously dividing the plurality of coils connected with each other into a plurality of independent coils, preferably, the fixing ribs are arranged in parallel pairs and positioned at the middle position between two adjacent coils. Adopt above-mentioned structure to fix respectively two adjacent coils, do benefit to subsequent coil simultaneously and cut apart, two free ends that the copper line after cutting apart produced all pass through fixed arris strip is fixed can not cause any influence to the coil, also does not receive the exogenic action, cuts apart process and welding process and does not have fixed front and back order, and convenient operation more, the contact corresponds with copper line position all the time, very big reduction the welded degree of difficulty, improved welded precision and disposable success rate.

In order to further simplify the base structure and provide reliable conducting performance, a conducting layer is preset in the base through injection molding and comprises a plurality of independent conductors, and any contact is correspondingly communicated with a conducting PIN foot arranged on one side of the base through an independent conducting wire. Among the prior art, the function of base mainly plays the fixed action, does not have the function that self switched on the power supply, and prior art solves the power supply problem of coil and adopts the mode of flexible circuit board (FPC) more to solve, and flexible circuit board (FPC) can additionally occupation space, and is unfavorable for the installation, simultaneously, can lead to appearing functional bad in VCM motor mechanical shock experimentation kind or then the use. This application adopts the design that the conducting layer replaced current flexible circuit board (FPC), has both saved installation space, the effectual stability and the reliability of guaranteeing the circuit again, does benefit to the overall arrangement design of base.

On the base, be located arbitrary parallel setting in pairs be provided with the terminal that is used for two copper line free ends of fixed coil between the fixed edges and corners, there is the clearance between terminal and the adjacent fixed edges and corners. Because four coils are interconnect's an organic whole structure before the installation, consequently two coils of head and the tail have a free copper line end respectively, for further convenient automatic wire winding installation and welding, set up two free copper line ends that the terminal is used for twining fixed coil on the base, can effectively guarantee the relative fixity of coil and base position like this, guarantee copper line between two adjacent coils and the contact of setting on the base, do benefit to orderly welding.

The base further comprises an upper cover body buckled on the base and used for being connected with the lower elastic sheet, and an avoiding groove used for containing the coil is arranged on the upper cover body corresponding to the coil. The upper cover body is used for better enabling the connection relationship between the base and other components of the VCM motor, for example, the upper cover body is used for supplementing and compensating the space connection relationship between the base and a lower elastic sheet in the VCM motor, and the space position relationship between the coil and the permanent magnet is better adjusted; as a further preferred scheme, the upper cover body also adopts a mode of presetting an embedded conductive layer with the same base to realize layered power supply for each component of the VCM motor, so as to replace the existing mode of supplying power to a Flexible Printed Circuit (FPC). Make the structural integrity of base better, can also provide better power supply scheme when satisfying current voice coil motor base fixed function.

Has the advantages that:

1. this application adopts four coils that same copper line winding formed to realize disposable installation, has removed loaded down with trivial details and uncontrollable nature of current coil independent installation from. One of the biggest technological effect and the advantage for current split type coil installation need not the point and glues in advance fixedly, also need not the stoving procedure simultaneously, and structural stability through injection moulding is good, and the copper line is confirmed relatively with the contact position that needs the welding, reduces the welded degree of difficulty.

2. The mechanism of the application also avoids the problems that two ends of a single coil are in a free state and are not easy to align with the contact in the prior art; meanwhile, the problem of high welding difficulty caused by the fact that the copper wire end head does not correspond to the contact position is solved.

3. This application replaces current flexible circuit board (FPC) to switch on through built-in conducting layer, has simplified the structure, has improved the stability and the electric conductivity of structure, has avoided the technology complicated because of installation electrically conductive flexible circuit board (FPC) brings, inefficiency scheduling problem.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is an exploded view of the overall structure of a voice coil motor according to the present application;

FIG. 2 is an exploded view of the structure of the base and the lower spring plate (including the assembled state of the upper cover);

FIG. 3 is an isometric view of a base three-dimensional structure;

FIG. 4 is a plan view of the base in a coil-mounted state;

FIG. 5 is a top view of a base strap terminal arrangement;

FIG. 6 is a schematic view of a conductive layer;

FIG. 7 is an isometric view of an upper cover structure;

FIG. 8 is a schematic view of the coil before installation;

fig. 9 is an enlarged view of the wire wrap terminal of the free end of the copper wire of fig. 8.

In the figure: 1-an outer shell; 2-upper spring plate; 3-a lens carrier; 4-support; 5-a permanent magnet; 6-lower spring plate; 7-a base; 71-a coil; 72-contact; 73-cutting the groove; 74-fixed ribs; 75-a straight wound post; 76-a terminal post; 77-conductive PIN; 78-a conductive layer; 8-upper cover body; 81-avoidance groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

For better clarity the present application is compared with the difference between the bases among the prior art and the different technological effects that bring, now the cooperation between the effect of this application in voice coil motor and the relevant structure of voice coil motor, theory of operation is simply discussed earlier.

As shown in fig. 1-4 of the description, the VCM motor sequentially includes, from top to bottom, an outer casing 1, an upper spring 2, a lens carrier 3, a support 4, a permanent magnet 5, a lower spring 6, and a base 7. Wherein, base 7 and the mutual lock of shell body 1 play a fixed effect, and lens carrier 3 is the mechanism that is used for installing the camera lens, and lens carrier 3 is installed in support 4 through last shell fragment 2 and shell fragment 6 down, because still be provided with the solenoid that is used for focus regulation on the lens carrier 3, through circular telegram to solenoid, circular telegram coil produces the magnetic field and plays the effect of focusing with the magnetic field interact of permanent magnet 5. The upper elastic sheet 2 and the lower elastic sheet 6 both adopt an inner ring and an outer ring design so as to meet the requirements of focusing and anti-shake movement of the lens carrier 3. Four permanent magnets 5 are respectively embedded at four corners of the support 4 as shown in fig. 1, inner and outer free ends of the lower elastic sheet 6 are respectively connected with the lens carrier 3 and the base 7, the middle part of the lower elastic sheet 6 is also connected with the support 4, elastic suspension connection among the base 7, the support 4 and the lens carrier 3 is realized, and relative motion among the base 7, the support 4 and the lens carrier 3 can be realized through the action of a magnetic field. The base 7 is provided with four independently electrified coils 71 corresponding to the lower portions of the four permanent magnets 5, and specifically, as shown in fig. 4, one or more coils 71 are electrified to interact with the magnetic field of the permanent magnets 5 to generate force on the support 4, so that the adjustment of the lens X/Y axis anti-shake is realized, wherein the X axis is the plane where the base 7 is located, and the Y axis is the anti-shake perpendicular to the plane where the base 7 is located. The specific adjustment range and direction depend on the magnitude of the magnetic force generated by the coil 71, and the control of the magnetic field strength is realized by controlling the current strength of the coil 71. The calibration of the current is different for different designs, and the above description is only for better understanding of the simple explanation of the working principle of the vcm, and the present application does not make substantial improvements on the adjusting technology, but the understanding of the working principle of the vcm is greatly helpful for understanding the technical innovation and the beneficial technical effects obtained by the present application.

Example 1:

the utility model provides a brand-new VCM motor coil directly winds base structure, includes base 7 through injection moulding, and base 7 is provided with on being close to four corners position with the VCM motor in four corresponding straight columns 75 that wind of four permanent magnets 5, four directly wind and equally divide on the column 75 and do not be provided with the coil 71 that communicates each other, the copper line of connecting between two adjacent coils 71 with establish on base 7 in advance respectively and lie in the contact 72 contact of coil 71 both sides, the copper line between two adjacent coils 71 is fixed through fixed arris strip 74 of setting on base 7.

The working principle of the present embodiment is not substantially different from the working principle of the existing VCM motor, and only the mounting manner of the base and the coil is changed, so that the technical effect is changed by changing the structure. This embodiment fixes a position the installation through adopting directly to wind post 75 to coil 71 winding, fixes coil 71 winding on directly winding post 75 through the mode of moulding plastics, and the key point lies in: when the installation, four coils 71 are interconnect, and be that same copper wire winding forms promptly, can once only accomplish four coil 71's installation, have removed the loaded down with trivial details and uncontrollable nature of current coil independent installation from. One of the greatest technical effects and advantages of the integrated coil 71 compared with the existing split-type coil mounting is that in the mounting process and the welding process, the split-type single coil needs to be fixed after being mounted, and is usually fixed in a dispensing manner; after dispensing, in order to achieve a good fixing effect, the customized tool needs to be used for restraining, and then baking and curing the glue to achieve the effect of fixing the coil. After the coil is fixed, the two free copper wire ends of the single coil are welded with the specified power-on contact, and because the free copper wire ends of the single coil are in a free state, the free copper wire ends of the single coil cannot be aligned with the contact, so that the welding process has difficulty. In the embodiment, the integrated coil 71 is arranged on the straight winding column 75 at one time, and the copper wire is wound and fixed on the straight winding column 75 at one time through a winding process without dispensing and pre-fixing and baking procedures.

In addition, since the copper wire connected between two adjacent coils 71 is disposed corresponding to the straight winding post 75 in this embodiment, the corresponding relationship between the copper wire and the contact 72 is very easy to control, and after the copper wire is wound on the straight winding post 75 by injection molding, the contact and the copper wire are directly spot-welded together at the position of the contact 72. Because the coils 71 are integrated with each other and the fixing ribs 74 are provided to restrain the copper wires connected between two adjacent coils 71, the problem that the two ends of a single coil 71 are in a free state and are not easy to align with the contacts 72 in the prior art is avoided; meanwhile, the problem of high welding difficulty caused by the fact that the copper wire end does not correspond to the contact 72 is solved. After welding is finished, only the copper wires between two adjacent contacts 72 between two adjacent coils 71 are required to be cut off, and the coils 71 connected with each other are changed into four independent coils 71, so that the mounting process is greatly simplified, the stability of the base structure is greatly improved, and the mounting precision of the coils 71 is also ensured easily; the technical problem that the welding end of the coil 71 is free and is not easy to align with the contact 72 for welding is solved, and the welding difficulty is obviously reduced.

As another embodiment of this embodiment, the fixed rib 74 may be fixed by dispensing and solidifying, instead of the injection-molded fixed rib 74 molding method; it is worth mentioning and emphasizing here that the spot-gluing is substantially different from the prior art spot-gluing coil 71, because the prior art coil 71 is independent, the copper wire end is in a free state, and needs to be accurately positioned for dispensing, otherwise, the subsequent welding process cannot be carried out, but in this embodiment, the copper wires with the originally determined relative positions are fixed on the base only by means of dispensing, so as to be used for subsequently dividing the coils 71 connected into one body into four independent coils, without the alignment requirement in the prior art dispensing technique, the structure of the connected integrated coils 71 is substantially changed compared with the prior independent coil installation, the structural change not only contributes to the stability and reliability of the product installation, meanwhile, the structure change also inevitably brings about simplification of the installation process and the flow, and improves the efficiency.

Example 2:

in addition to embodiment 1, with reference to the structure shown in fig. 4, the fixing ribs 74 are arranged in parallel pairs and located at the middle position between two adjacent coils 71. Adopt above-mentioned structure to fix respectively two adjacent coils, do benefit to subsequent coil simultaneously and cut apart, two free ends that the copper line after cutting apart produced all pass through fixed arris strip 74 is fixed and can not cause any influence to the coil, also does not receive the exogenic action, cuts apart process and welding process and does not have fixed front and back order, and convenient operation more, contact 72 corresponds with the copper line position all the time, very big reduction the welded degree of difficulty, improved welded precision and disposable success rate.

Example 3:

on the basis of the structure of embodiment 1 or 2, in order to solve the problem that two free copper wire ends are fixed when the integrated coil 71 is installed, so that the position of the copper wire between any two adjacent coils 71 is determined relative to the base 7 after the integrated coil 71 is installed, so that the position of the copper wire and the position of the contact 72 are determined during subsequent welding, and the welding difficulty is reduced, as shown in fig. 5: a terminal 76 for fixing two free ends of the copper wires of the coil 71 is arranged between any parallel pair of the fixing ribs 74, and a gap exists between the terminal 76 and the adjacent fixing rib 74. Because four coils 71 are interconnect's integrative structure before the installation, consequently two coils 71 at the head and the tail have a free copper line end respectively, for further easy to assemble and welding, set up terminal 76 on base 7 and be used for twining two free copper line ends of fixed coil 71, can effectively guarantee the relative fixity in coil 71 and base 7 position like this, ensure the copper line between two adjacent coils 71 and set up the contact 72 contact on base 7, do benefit to orderly welding. After welding is completed, the copper wire is cut off only along the cutting grooves 73 formed between the fixed ribs 74 arranged in pairs, and the coils 71 connected integrally and mutually form four independent coils.

As another embodiment of this embodiment, the coil 71 may be configured as shown in fig. 8 before installation, and when installation, it is only necessary to correspondingly install the coil 71 on the base 7, and the terminal 76 may be provided to better position the copper wire end of the coil 71 as shown in fig. 9.

Example 4:

in order to further simplify the base structure while providing reliable electrical conductivity, in conjunction with the description of fig. 6 and 7: a conductive layer 78 is pre-arranged in the base 7 through injection molding, the conductive layer 78 comprises a plurality of independent conductors, and any one of the contacts 72 is correspondingly communicated with a conductive PIN 77 arranged on one side of the base 7 through an independent wire. Among the prior art, base 7's function mainly plays the fixed action, does not have the function that self switched on the power supply, and prior art solves the power supply problem of coil and adopts the mode of flexible circuit board (FPC) more to solve, and flexible circuit board (FPC) can additionally occupation space, and is unfavorable for the installation, simultaneously, can lead to the stability of winding displacement at VCM motor focusing and anti-shake in-process. This application adopts conducting layer 78 to replace the design of current flexible circuit board (FPC), has both saved installation space, the effectual stability and the reliability of guaranteeing the circuit again, does benefit to the overall arrangement design of base 7.

As a preferable mode of any embodiment of the present application, hall sensors for sensing the offset of the support 4 are further disposed in two adjacent or opposite straight-wound columns 75, so as to further feed back the operating state of the VCM motor, and further adjust the operating current of the coil 71 to implement displacement compensation, so as to achieve a better anti-shake effect; the working principle of the hall sensor belongs to the mature prior art, and is not described in detail in this embodiment.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (5)

1. The utility model provides a brand-new VCM motor coil directly winds base structure, includes base (7) through injection moulding, its characterized in that: base (7) are close to four corners and are provided with four corresponding straight columns (75) of winding with four permanent magnets (5) in the VCM motor on the position, four straight winding is equallyd divide on column (75) and is provided with coil (71) that communicate each other, and the copper line of being connected between two adjacent coils (71) contacts with contact (72) that predetermine respectively on base (7) and lie in coil (71) both sides, and the copper line between two adjacent coils (71) is fixed through fixed arris strip (74) of setting on base (7) fixedly.

2. A brand new VCM motor coil direct wound base structure according to claim 1, wherein: the fixed ribs (74) are arranged in parallel in pairs and are positioned in the middle of two adjacent coils (71).

3. A brand new VCM motor coil direct wound base structure according to claim 2, wherein: the conductive layer (78) is arranged in the base (7) in advance through injection molding, the conductive layer (78) comprises a plurality of independent wires, and any contact (72) is correspondingly communicated with a conductive PIN (77) arranged on one side of the base (7) through the independent wires.

4. A brand new VCM motor coil direct winding base structure according to claim 2 or 3, wherein: on the base (7), a wiring terminal (76) used for fixing two copper wire free ends of the coil (71) is arranged between any parallel pair of the fixed ribs (74), and a gap exists between the wiring terminal (76) and the adjacent fixed ribs (74).

5. A brand new VCM motor coil direct wound base structure according to claim 4, wherein: the base (7) further comprises an upper cover body (8) buckled on the base (7) and used for being connected with the lower elastic sheet (6), and an avoiding groove (81) used for containing the coil (71) is formed in the position, corresponding to the coil (71), of the upper cover body (8).

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