CN203941334U

CN203941334U - Mid-voice coil motor structure

Info

Publication number: CN203941334U
Application number: CN201420281444.2U
Authority: CN
Inventors: 沈文振
Original assignee: Xiamen Xinhongzhou Precision Technology Co Ltd
Current assignee: Xiamen Xinhongzhou Precision Technology Co Ltd
Priority date: 2014-05-29
Filing date: 2014-05-29
Publication date: 2014-11-12
Anticipated expiration: 2024-05-29

Abstract

The utility model discloses a kind of mid-voice coil motor structure, it comprises housing, base, upper fixed seat, coil brace, upper shell fragment, lower shell fragment, coil, magnet; Described base snaps onto the open end of housing, forms an accommodation space in housing; Described coil brace is a sleeve, coil winding is on coil brace, coil brace is nested with in housing in mode moving up and down together with coil wound on it, the upper/lower terminal of coil brace respectively be not out of shape the interior edge of upper shell fragment and the interior edge of the lower shell fragment of distortion lean, magnet is arranged on inner walls and is positioned at the periphery of coil, relative with coil spacing.The utility model is the centre in focusing stroke by camera lens, to not design variations amount of shell fragment, in the time of focusing, VCM does not just need to overcome shell fragment distortion like this, when VCM focusing, be just not activated electric current, and due to lens lock pay after in the middle of focusing stroke, also can accelerate so need not overcome shell fragment distortion acting focusing speed.

Description

Mid-voice coil motor structure

Technical field

The utility model relates to a kind of camera installation, particularly relates to a kind of mid-voice coil motor structure.

Background technology

In recent years, the camera that is equipped on mobile phone etc. increases the pixel count of image sensor and carries out the high-quality of photographs.Meanwhile, the lens combination of just carrying, is also transformed into the camera model of firing line from the camera model of the fixed-focus in past.Various imaging devices as video camera, frequency still camera and mobile phone etc. comprise by lens barrel, arrange optical imaging system for example movably camera lens construct the lens unit forming.An example of this imaging device is the imaging device that is equipped with movable part, and described movable part has the movable camera lens for carrying out zoom or focusing, and wherein said movable part can move along optical axis direction under the effect of linear actuators.

So existing VCM product is because the design of early stage Driver IC only supports unidirectional current can only focus toward a direction on focusing stroke, as Chinese patent discloses a kind of lens unit (application number 200610004687.1), it comprises and is built-in with the lens barrel 1 ' of optical imaging system, movable camera lens 2 ', coil 3 ', magnet 4 ', bias voltage leaf spring 5 ', 6 '.When preventing from taking downwards because the gravity of movable camera lens 2 ' sinks to carrying out burnt focusing far away, so in the time of structural design, in movable camera lens bottom, corresponding position limiting structure is set in advance, make bias voltage leaf spring 5 ', 6 ' in original state in deformation state, now, movable camera lens is in burnt state far away.Due to the design of this predeformation, although the problem that overcomes camera lens gravity having existed while having overcome downward shooting, but, in the time of non-downward shooting, in the time of focusing, the distortion that just causes VCM need to overcome bias voltage leaf spring 5 ', 6' in the time of work is first done work, so relatively power consumption of traditional VCM, and could do work because need to overcome the distortion strength of shell fragment, so focusing speed is also slow.

Utility model content

The purpose of this utility model is to provide a kind of and focuses that speed is fast, the mid-voice coil motor structure of power saving.

For achieving the above object, technical solution of the present utility model is:

The utility model is a kind of mid-voice coil motor structure, and it comprises housing, base, upper fixed seat, coil brace, upper shell fragment, lower shell fragment, coil, magnet; Described base snaps onto the open end of housing, forms an accommodation space in housing; Described coil brace is a sleeve, coil winding is on coil brace, coil brace is nested with in housing in mode moving up and down together with coil wound on it, the upper/lower terminal of coil brace respectively be not out of shape the interior edge of upper shell fragment and the interior edge of the lower shell fragment of distortion lean, between the upper surface of coil brace and housing inner top surface, there is gap, between the lower surface of coil brace and base, there is gap; Upper shell fragment outer is fixed on upper fixed seat, and upper fixed seat is nested with in housing, and lower shell fragment outer is fixed on base; Described magnet is arranged on inner walls and is positioned at the periphery of coil, relative with coil spacing.

Described upper fixed seat is a frame component, and middle part has groove.

Described base is a frame component, and middle part has groove.

Described upper shell fragment is made up of fixed part, variant part and interior edge; Described variant part is made up of arc spring, and the two ends of this arc spring are connected between the interior edge of fixed part and shell fragment and are relative with inwall interval, fixed part bight, and arc spring is arranged on four angles of fixed part inwall; The fixed part of described upper shell fragment is fixed on upper fixed seat, and variant part is unsettled on upper fixed seat groove, and the upper end of coil brace leans on the interior edge of upper shell fragment.

Described lower shell fragment is made up of fixed part, variant part and interior edge; Described variant part is made up of arc spring, and the two ends of this arc spring are connected between the interior edge of fixed part and shell fragment and are relative with inwall interval, fixed part bight, and arc spring is arranged on four angles of fixed part inwall; The fixed part of described lower shell fragment is fixed on base, and variant part is unsettled on base groove, and the upper end of coil brace leans on the interior edge of lower shell fragment.

For the slow reason with comparing power consumption of existing VCM focusing speed, add current Driver IC and can support bidirectional current, the utility model proposes a new departure and two-way focusing in VCM design, adopt the Driver IC that supports bidirectional current, centre by camera lens in focusing stroke, to not design variations amount of shell fragment, , coil brace upper, lower two ends respectively be not out of shape the interior edge of upper shell fragment and the interior edge of the lower shell fragment of distortion lean, in the time of focusing, VCM does not just need to overcome shell fragment deformation force like this, when VCM focusing, be just not activated electric current, and due to lens lock pay after in focusing stroke in the middle of, so need not overcome shell fragment distortion acting focusing speed also can accelerate.Meanwhile, because base does not have position limiting structure with respect to the variant part below of lower shell fragment, therefore, in the time of the logical negative current of coil, camera lens can move downward, and realizes focusing thereby camera lens is moved up and down.

Below in conjunction with the drawings and specific embodiments, the utility model is further described.

Brief description of the drawings

Fig. 1 is the schematic diagram of commonly using lens unit patent;

Fig. 2 is axonometric drawing of the present utility model;

Fig. 3 is forward three-dimensional exploded view of the present utility model;

Fig. 4 is cut-open view of the present utility model;

Fig. 5 is partial sectional perspective view of the present utility model;

Fig. 6 is base and lower shell fragment assembled shaft mapping;

Fig. 7 is reverse three-dimensional exploded view of the present utility model.

Embodiment

As shown in Fig. 2-Fig. 4, Fig. 7, the utility model is a kind of mid-voice coil motor structure, and it comprises housing 1, base 2, upper fixed seat 3, coil brace 4, upper shell fragment 5, lower shell fragment 6, coil 7, magnet 8.

Described base 2 is a frame component, and middle part has groove 21, and it snaps onto the open end of housing 1, at accommodation space of the interior formation of housing 1.Described coil brace 4 is a sleeve, coil 7 is wrapped on coil brace 4, coil brace 4 is nested with in housing 1 in mode moving up and down together with coil wound on it 7, coil brace 4 upper, lower two ends respectively be not out of shape upper shell fragment 5 interior along 53 and lower the interior of shell fragment 6 of distortion lean along 63, between the upper surface of coil brace 4 and housing 1 inner top surface, there is gap A(as shown in Figure 5), between the lower surface of coil brace 4 and base 2, there is gap B(as shown in Figure 5), this gap is as being socketed with on the coil brace 4 of camera lens, lower shift motion, it is the zoom stroke of camera lens.Described upper fixed seat 3 is a frame component, and middle part has groove 31, and upper shell fragment 5 outers are fixed on upper fixed seat 3, and upper fixed seat 3 is nested with in housing 1, and lower shell fragment 6 outers are fixed on base 2; Described magnet 8 is arranged on housing 1 inwall and is positioned at the periphery of coil 7, relative with coil 7 intervals.

As shown in Fig. 3, Fig. 5, described upper shell fragment 5 is by fixed part 51, variant part 52 and interiorly form along 53; Described variant part 52 is made up of arc spring 521,522,523,524, the two ends of this arc spring 521,522,523,524 are connected to fixed part 51 and upper shell fragment 5 is interior along between 53 and relative with fixed part 51 inwall intervals, bight, and arc spring 521,522,523,524 is arranged on four angles of fixed part 51 inwalls.

Described lower shell fragment 6 is by fixed part 61, variant part 62 and interiorly form along 63; Described variant part 62 is made up of arc spring 621,622,623,624, the two ends of this arc spring 621,622,623,624 are connected to fixed part 61 and lower shell fragment 6 is interior along between 63 and relative with fixed part 61 inwall intervals, bight, and arc spring 621,622,623,624 is arranged on four angles of fixed part 61 inwalls.

When assembling, the fixed part 51 of described upper shell fragment 5 is fixed on upper fixed seat 3, and variant part 52 is unsettled on upper fixed seat 3 grooves 31.Shown in figure 6, the fixed part 61 of lower shell fragment 6 is fixed on base 2, and variant part 62 is unsettled on base 2 grooves 21.The upper end of described coil brace 4 lean upper shell fragment 5 interior along 53 on, the upper end of coil brace 4 lean lower shell fragment 6 interior along 63 on.

Principle of work of the present utility model:

Adopt the Driver IC that supports bidirectional current, the electric current of both direction is provided to coil, the interaction by coil 7 with magnet 8, the coil brace 4 that actuating sleeve is connected to camera lens moves up and down, and focuses up and down.Because upper shell fragment 5 variant parts 52 and lower shell fragment 6 variant parts 62 are all in vacant state, when moving up and down, coil brace 4 only needs to overcome the elastic force of upper shell fragment 5 variant parts 52 and lower shell fragment 6 variant parts 62.

Emphasis of the present utility model is just: when assembling, upper and lower shell fragment is without predeformation, and meanwhile, the variant part of lower shell fragment and base do not have spacing.Thereby can make coil brace move downward.

The above, it is only the utility model preferred embodiment, the structure of shell fragment can have multiple, therefore can not limit the scope that the utility model is implemented with this, the equivalence done according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1. a mid-voice coil motor structure, is characterized in that: it comprises housing, base, upper fixed seat, coil brace, upper shell fragment, lower shell fragment, coil, magnet; Described base snaps onto the open end of housing, forms an accommodation space in housing; Described coil brace is a sleeve, coil winding is on coil brace, coil brace is nested with in housing in mode moving up and down together with coil wound on it, the upper/lower terminal of coil brace respectively be not out of shape the interior edge of upper shell fragment and the interior edge of the lower shell fragment of distortion lean, between the upper surface of coil brace and housing inner top surface, there is gap, between the lower surface of coil brace and base, there is gap; Upper shell fragment outer is fixed on upper fixed seat, and upper fixed seat is nested with in housing, and lower shell fragment outer is fixed on base; Described magnet is arranged on inner walls and is positioned at the periphery of coil, relative with coil spacing.

2. mid-voice coil motor structure according to claim 1, is characterized in that: described upper fixed seat is a frame component, and middle part has groove.

3. mid-voice coil motor structure according to claim 1, is characterized in that: described base is a frame component, and middle part has groove.

4. mid-voice coil motor structure according to claim 2, is characterized in that: described upper shell fragment is made up of fixed part, variant part and interior edge; Described variant part is made up of arc spring, and the two ends of this arc spring are connected between the interior edge of fixed part and upper shell fragment and are relative with inwall interval, fixed part bight, and arc spring is arranged on four angles of fixed part inwall; The fixed part of described upper shell fragment is fixed on upper fixed seat, and variant part is unsettled on upper fixed seat groove, and the upper end of coil brace leans on the interior edge of upper shell fragment.

5. mid-voice coil motor structure according to claim 3, is characterized in that: described lower shell fragment is made up of fixed part, variant part and interior edge; Described variant part is made up of arc spring, and the two ends of this arc spring are connected between fixed part and the interior edge of lower shell fragment and are relative with inwall interval, fixed part bight, and arc spring is arranged on four angles of fixed part inwall; The fixed part of described lower shell fragment is fixed on base, and variant part is unsettled on base groove, and the upper end of coil brace leans on the interior edge of lower shell fragment.