JP2006078869A - Lens drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens driving device capable of omitting a grounding lead wire, damaging a driving coil, deleting a space for routing the grounding lead wire, and improving efficiency of soldering work. .
In the lens driving device 1, a ground terminal 85 extends from a stator core 52 toward an inclined surface 86 of a terminal block 80. On the slope 86 of the terminal block 80, a plurality of power supply terminals having coil wires connected to the lower end portions 810, 820, 8, 830, and 840 are also arranged, so that they can be shared by all terminals. The flexible substrate 88 can be soldered together.
[Selection] Figure 1

Description

  The present invention relates to a lens driving device used for a camera or the like.

A thin camera mounted on a camera-equipped portable device has a moving lens body that holds a lens, a ring-shaped magnet attached to the outer periphery of the moving lens body, and a drive coil that faces the magnet. A configuration has been devised in which the lens is linearly moved in the optical axis direction by controlling energization to the coil, and the lens is magnetically held there (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-150759

  Even in such a lens driving device, it is necessary to ensure grounding. However, if the lead wire for grounding is to be soldered to a case or the like, since the heat capacity is large, the driving coil may be damaged by the heat. In addition, a space for routing the lead wire for grounding is required, and securing such a space is not preferable in terms of downsizing the lens driving device. Furthermore, in order to supply power to the drive coil, it is necessary to connect the end of the coil wire to the power supply terminal, and to solder a flexible substrate to the power supply terminal. Since it is necessary to solder the wire, it takes time and effort.

  In view of the above problems, the object of the present invention is to eliminate the lead wire for grounding, to damage the drive coil, to delete the space for routing the lead wire for grounding, and to improve the efficiency of the soldering work. An object of the present invention is to provide a lens driving device that can be realized.

  In order to solve the above-described problems, in the present invention, a lens having a moving lens body having a lens and a driving unit having a motor mechanism for reciprocating the moving lens body along the optical axis of the lens. In the drive device, the drive means includes a plurality of power supply terminals to which coil wires of drive coils of the motor mechanism are electrically connected, and a ground terminal, and each of the plurality of power supply terminals has an external connection end. Both are arranged together in a common external connection region, and the external connection end of the ground terminal extends to the external connection region and is located in the common external connection region together with the power supply terminal. It is characterized by.

  In the present invention, the ground terminal is formed, and the external connection end portion of the ground terminal extends to the external connection region where the external connection terminals of the power supply terminal are collectively arranged. A common substrate can be connected to the external connection end and the external connection end of the ground terminal. Therefore, the efficiency of soldering work can be increased. Further, since the lead wire for grounding can be omitted, the drive coil is not damaged by heat when soldering the lead wire for grounding to the case. Furthermore, no space is required for routing the lead wire for grounding.

  In the present invention, the plurality of power supply terminals are fixed to a common terminal block having the external connection region, for example, and the ground terminal is overlapped with the terminal block or penetrates the terminal block. It is preferable that the external connection end is located in the external connection region. If comprised in this way, since a terminal block can be hold | maintained by a ground terminal, the structure clamped between two members can be employ | adopted as a fixing structure of a terminal block.

  In the present invention, the plurality of power supply terminals are fixed to the terminal block in the middle in the length direction, and the end portions for connecting the coil wires are connected to the external connection end portions of the plurality of power supply terminals. Are preferably located on different sides of the terminal block. If comprised in this way, when soldering a flexible board | substrate etc. to the edge part for external connection of an electric power feeding terminal, the coil wire connected to the edge part for coil wire connection will not be damaged with the heat.

  In the present invention, it is preferable that the ground terminal is configured integrally with the stator core as a protruding portion from the outer peripheral edge of the stator core with respect to the drive coil. The ground terminal can be configured only by partially changing the mold for manufacturing the stator core.

  In the present invention, in the motor mechanism, as the stator core, a first stator core, a second stator core, a third stator core, a fourth stator core having a plurality of pole teeth bent at right angles at the inner peripheral edge of an annular flange portion. The stator cores are arranged in this order, and the drive coils are arranged between the first stator core and the second stator core, and between the third stator core and the fourth stator core, respectively. In such a case, the ground terminal may protrude from the outer peripheral edge of one of the four stator cores.

  In the present invention, the ground terminal protrudes from the outer peripheral edge of one of the second stator core and the third stator core, and the external connection end is directed toward the other stator core in the axial direction. It is preferable that the external connection region is disposed at a position deviated toward the position where the other stator core is positioned in the axial direction when viewed from the overlapping portion of the second stator core and the third stator core. . With this configuration, the connection of the flexible substrate to each external connection end or the connection of the coil wire to the coil wire connection end within the range of the height dimension in which the four stator cores are laminated, etc. It can be carried out.

  In the present invention, the external connection end of the power supply terminal and the external connection end of the ground terminal are, for example, linearly arranged with the external connection end of the ground terminal as the center.

  In the lens driving device of the present invention, the ground terminal is formed, and the external connection end of the ground terminal extends to the external connection region where the external connection terminals of the power feeding terminal are arranged together. A common substrate can be connected to the external connection end of the power supply terminal and the external connection end of the ground terminal. Therefore, the efficiency of soldering work can be increased. Further, since the lead wire for grounding can be omitted, the drive coil is not damaged by heat when soldering the lead wire for grounding to the case. Furthermore, no space is required for routing the lead wire for grounding.

  A lens driving device to which the present invention is applied will be described below with reference to the drawings.

(overall structure)
1A and 1B are a plan view and a cross-sectional view of a lens driving device to which the present invention is applied, respectively. The left half of FIG. 1B shows a state where the lens is located on the object side (object side), and the right half of FIG. 1B shows the lens on the side opposite to the object side (image side). ) Is shown.

  1A and 1B, a lens driving device 1 according to the present embodiment is a thin camera mounted on a camera-equipped mobile phone or the like. The two lenses 2 and 3 are generally integrated on the lens holder 11 in order to move in both directions of the A direction approaching the object side) and the B direction approaching the opposite side (image side) of the subject. The movable lens body 10 held in the first position, the drive mechanism 5 that moves the movable lens body 10 along the optical axis L, and the fixed-side member 20 on which the drive mechanism 5 and the movable lens body 10 are mounted. In this embodiment, the fixed side member 20 includes a base 21 located on the image side and a cover 22 located on the object side.

  In this embodiment, as will be described in detail later, there is no member on the subject side with respect to the moving lens body 10 in a state after the driving mechanism 5 is mounted on the base 21 and before the moving lens body 10 is mounted. Instead, a moving lens body arrangement unit 7 is configured with the insertion port 6 facing the subject side. Therefore, in this embodiment, the lens driving device 1 is configured by covering the cap member 23 after the moving lens body 10 is inserted into the moving lens body arranging portion 7 from the insertion opening 6.

(Configuration of drive mechanism)
FIGS. 2A and 2B are a plan view and a cross-sectional view, respectively, of a drive coil used in the lens drive device shown in FIG. FIGS. 3A, 3B, 3C, and 3D are a plan view, a cross-sectional view, a half-sectional view, and a description of pole teeth of the first stator core used in the lens driving device shown in FIG. FIG. 4A, 4B, 4C, and 4D are a plan view, a cross-sectional view, an explanatory diagram of pole teeth, and a terminal portion of the second stator core used in the lens driving device shown in FIG. FIG. FIGS. 5A, 5B, 5C, and 5D are a plan view, a cross-sectional view, an explanatory view of pole teeth, and a coil terminal of the third stator core used in the lens driving device shown in FIG. It is a side view of the drawer | drawing-out part. 6A, 6B, 6C, and 6D are a plan view, a cross-sectional view, a half-sectional view, and a description of pole teeth of the fourth stator core used in the lens driving device shown in FIG. FIG. FIGS. 7A, 7B, 7C, and 7D are a plan view and a bottom view of the terminal block of the lens driving device shown in FIG. 1, and a cross section taken along line BB 'in FIG. It is sectional drawing in the AA 'line of a figure and Fig.7 (a). 8A and 8B are a plan view and a cross-sectional view, respectively, of the rotor magnet of the lens driving device shown in FIG. 9 (a), (b), (c), (d), and (e) are respectively a plan view, a side view, a cross-sectional view, a bottom view, and a spiral groove of the guide member of the lens driving device shown in FIG. It is explanatory drawing of.

  As shown in FIGS. 1B, 2A, and 2B, the drive mechanism 5 includes a drive coil 55 in which a coil wire 550 is wound around a bobbin 555 made of a cylindrical insulator with a flange. Two are provided, one of which is disposed between the first stator core 51 shown in FIG. 3 and the second stator core 52 shown in FIG. 4, and the other is shown in FIG. It is arranged between the third stator core 53 and the fourth stator core 54 shown in FIG.

  The first stator core 51 shown in FIG. 3 and the fourth stator core 54 shown in FIG. 6 are used as a case of the stator 50, and have a U-shaped cross section for disposing the drive coil 55 inside. Yes. Here, the first stator core 51 shown in FIG. 3 and the fourth stator core 54 shown in FIG. 6 have notches 515 and 545 for pulling out the coil terminals 551 shown in FIGS. Is formed. The second stator core 52 shown in FIG. 4 and the third stator core 53 shown in FIG. 5 are arranged so as to overlap with the first stator core 51 or the fourth stator core 54 with the drive coil 55 interposed therebetween. In this state, the pole teeth 511 of the first stator core 51 and the pole teeth 521 of the second stator core 52 are alternately arranged in the circumferential direction on the lower stage side, and the pole teeth 531 of the third stator core 53 on the upper stage side. The pole teeth 541 of the fourth stator core 54 are alternately arranged in the circumferential direction. The first stator core 51 and the fourth stator core 54 are formed with holes 516 and 546 for adjusting the angular position with respect to the base 21 shown in FIG.

  Further, the second stator core 52 shown in FIG. 4 is formed with a rectangular protruding portion 520 protruding outward in the radial direction. From the tip side of the protruding portion 520, the third stator core 53 in the optical axis direction is formed. The ground terminal 85 extends obliquely toward the upper side where the is located.

  From the stator 50 having such a configuration, a total of four coil terminals 551 are drawn out from the two drive coils 55, and these coil terminals 551 are respectively shown in FIGS. 7 (a), 7 (b), (c), ( It is connected to lower ends 810, 820, 830, 840 (coil connecting ends) of terminals 81, 82, 83, 84 linearly arranged on the bottom surface 57 of the resin terminal block 80 shown in d). . The terminal block 80 is obtained by integrally fixing the vicinity of the center of the four terminals 81, 82, 83, 84 bent in a “<” shape with a resin.

  The terminal block 80 is placed on the upper surface of the projecting portion 520 of the second stator core 52 and the ground terminal 85 shown in FIG. 4 and fixed by a method such as adhesion. Accordingly, the terminal block 80 is disposed at a position that is biased toward the position where the third stator core 53 is positioned in the axial direction when viewed from the overlapping portion of the second stator core 52 and the third stator core 53.

  In this state, the upper end portion 851 (external connection end portion) of the ground terminal 85 is located on the slope 86 (external connection region) of the terminal block 80. Here, on the slope 86 of the terminal block 80, upper ends 811, 821, 831, and 841 (end portions for external connection) of the terminals 81, 82, 83, and 84 are also positioned. Therefore, the upper end portion 851 of the ground terminal 85 is located at the center of the upper end portions 811, 821, 831, 841 (end portions for external connection) of the four terminals 81, 82, 83, 84, and a total of five terminals. 81, 82, 83, 84, 85 are arranged on a straight line. Therefore, in this embodiment, as shown in FIG. 1B, a flexible substrate 88 or a wiring substrate such as a rigid substrate is collectively applied to these five terminals 81, 82, 83, 84, 85. Soldering is performed to supply power to each drive coil 55 and to ground the ground terminal 85.

  As shown in FIG. 1B, in the driving mechanism 5 of the lens driving device 1 of the present embodiment, the rotor magnet 60 shown in FIGS. 8A and 8B is disposed inside the stator 50. A semicircular cutout 61 for adjusting the angular position of the rotor magnet 60 is formed on the upper surface. On the outer peripheral surface of the rotor magnet 60, S poles and N poles are alternately arranged in the circumferential direction.

  A sleeve-shaped guide member 70 (cylindrical guide member) shown in FIGS. 9A to 9E is arranged inside the rotor magnet 60. A concave portion 75 for filling an adhesive is formed on the outer peripheral surface of the guide member 70, and the inner peripheral surface of the rotor magnet 60 and the outer peripheral surface of the guide member 70 are bonded and fixed using the concave portion 75. Has been. Here, a lateral hole (not shown) is formed on the object side of the guide member 70 for adjusting the angle phase when the rotor magnet 60 is bonded and fixed.

  The guide member 70 is disposed between the cover 22 and the base 21 in a state in which movement in the optical axis direction is prevented. Further, the guide member 70 is in a state of being rotatable around the axis (optical axis L) inside the annular protrusion 211 formed on the upper surface of the base 21 and inside the step 222 of the cover 22. Accordingly, when power is supplied to the two drive coils 55 via the flexible substrate 88, the rotor magnet 60 and the guide member 70 rotate integrally around the optical axis L. Thus, in the present embodiment, the stator 50 and the rotor magnet 60 constitute a stepping motor mechanism 58 as a drive source that rotates the guide member 70 as a rotor.

  As shown in FIGS. 9C and 9E, an internal thread 72 for transmitting a rotational force to the moving lens body 10 described below is formed on the inner peripheral surface of the guide member 70. .

(Configuration of moving lens body)
10A and 10B are a plan view and a side view, respectively, of the moving lens body of the lens driving device shown in FIG.

  1B and 10A and 10B, in the lens driving device 1 of the present embodiment, two lenses 2 and 3 and an aperture 4 are placed inside the guide member 70 with a lens holder 11. The held cylindrical moving lens body 10 is coaxially arranged. Here, while an internal thread 72 is formed on the inner peripheral surface of the guide member 70 (see FIGS. 9C and 9E), the outer peripheral surface of the large-diameter portion 12 of the lens holder 11 in the moving lens body 10. The moving lens body 10 is rotatable about the optical axis with respect to the guide member 70 by the engagement of the male screw 14 with the female screw 72. It is supported so that it can move along. In the moving lens body 10, three guide grooves 151, 152, and 153 for forming a rotation prevention mechanism described later are formed at substantially equal angular intervals on the outer peripheral surface of the small-diameter portion 13 on the upper side of the lens holder 11. These guide grooves 151, 152, 153 extend linearly along the optical axis direction. Here, the guide grooves 151, 152, and 153 engage with the protrusions 236, 237, and 238 of the cap member 23 only at a predetermined phase angle.

(Composition of cover and cap)
11 (a), 11 (b), 11 (c) and 11 (d) are a plan view, a bottom view, an explanatory view showing a cross-sectional structure of the cover of the lens driving device shown in FIG. FIG. 12A, 12B, 12C, and 12D are a plan view, a bottom view, a side view, and a cross-sectional view, respectively, of the cap member of the lens driving device shown in FIG.

  As shown in FIG. 1B, the drive mechanism 5 and the moving lens body 10 are covered with a cover 22 having a rectangular planar shape shown in FIG. A circular hole 220 for securing the optical path of the lenses 2 and 3 is formed in the cover 22. In this embodiment, as shown in FIG. 1B, a disc-shaped cap member 23 shown in FIG. 12 is fixed to the upper surface of the cover 22. The cap member 23 is also formed with a circular hole 230 for securing the optical path of the lenses 2 and 3.

  The cap member 23 has a cylindrical portion 231 protruding below the flange-shaped upper surface portion, and the cylindrical portion 231 has an outer diameter dimension that can be fitted into the hole 220 of the cover 22.

  Here, on the side surface of the cylindrical portion 231 of the cap member 23, three engagement protrusions 234 are formed at substantially equal angular intervals. On the other hand, the cover 22 is formed with three notches around the hole 220 at substantially equal angular intervals. When the cylindrical portion 231 of the cap member 23 is fitted into the hole 220 of the cover 22, Each of the three engaging projections 234 formed on the cylindrical portion 231 of the member 23 passes through the notch 224.

  In the cover 22, the opening edge of the hole 220 is a thin portion 225 at a portion adjacent to each of the three notches 224 in the clockwise direction CW. Therefore, when the cap member 23 is turned in the clockwise direction CW after the cylindrical portion 231 of the cap member 23 is fitted into the hole 220 of the cover 22, the gap between the flange-shaped upper surface portion 232 and the engagement protrusion 234 is between The thin portion 234 of the cover 22 is fitted to the cover 22, and the cap member 23 is detachably attached to the cover 22. Thus, an engagement mechanism 24 for temporarily fixing the cap member 23 on the cover 22 is configured between the cap member 23 and the cover 22.

  Three protrusions 239 are formed on the outer peripheral edge of the cap member 23 on the lower surface side. In contrast, a guide surface 229 that engages with the protrusion 239 of the cap member 23 is formed on the outer peripheral edge of the annular step 228 that surrounds the hole 220 in the cover 22, and the protrusion that engages with the protrusion 239 on the guide surface 229. 223 is formed. These protrusions 223 and 239 also function as the engagement mechanism 24.

(Configuration of the rotation prevention mechanism)
In the lens driving device 1 configured as described above, three protrusions 236, 237, and 238 are formed at substantially equal angular intervals on the inner peripheral edge of the hole 230 of the cap member 23, and the cap member 23 is attached to the cover 22. In this state, the three protrusions 236, 237, and 238 are fitted in the three guide grooves 151, 152, and 153 of the moving lens body 10, respectively. These protrusions 151, 152, 153 and guide grooves 236, 237, 238 are formed on the movable lens body 10 when the rotational force of the guide member 70 is transmitted to the movable lens body 10 via the male screw 14 and the female screw 72. The rotation prevention mechanism 16 that prevents the rotation is configured. The rotation prevention mechanism 16 causes the moving lens body 10 to move linearly along the optical axis L.

  Here, since the guide grooves 151, 152, and 153 and the protrusions 236, 237, and 238 are formed at substantially equal angular intervals at three locations that are spaced apart from each other in the circumferential direction around the optical axis, The grooves 151, 152, 153 and the protrusions 236, 237, 238 are centered. In addition, since the guide grooves 151, 152, 153 and the protrusions 236, 237, 238 are formed at approximately three equiangular intervals around the optical axis, the guide grooves 151, 152, 153 are provided at any of the three positions. And the projections 236, 237, and 238 reliably define the position, so that the movable lens body 10 can be accurately centered.

  In configuring the rotation prevention mechanism 16, a protrusion may be formed on the movable lens body 10 and a guide groove may be formed on the cap member 23. In any case, the rotation prevention mechanism 16 considers the arrangement angle so that it can be engaged only when the mutual phase angle is constant.

(Configuration of backlash prevention mechanism)
FIG. 13 is a side view of the backlash prevention spring of the lens driving device shown in FIG.

  Since the rotational force of the guide member 70 is transmitted through the male screw 14 and the female screw 72, the moving lens body 10 has a moving lens body in order to prevent backlash between the male screw 14 and the female screw 72. A coil spring 40 (biasing member) for preventing backlash shown in FIG. 13 is disposed between the end face 10 and the cap member 23.

(Configuration of stopper mechanism)
FIG. 14 is a plan view of a stopper member of the lens driving device shown in FIG.

  As shown in FIG. 9 (c), the guide member 70 of this embodiment has a female screw 72 formed on one side in the optical axis direction (subject side / object side indicated by arrow A) up to the edge of the small diameter portion. The valley portion (spiral groove) of the screw 72 is in an open state without closing toward one side (subject side / object side indicated by arrow A) in the optical axis direction. For this reason, when the moving lens body 10 is inserted into the moving lens body arranging portion 7, the crest portion of the male screw 14 of the moving lens body 10 (see the convex portion / see FIG. 10B) is the female screw of the guide member 70. Enters the valley easily.

  On the other hand, the guide member 70 has only a female screw 72 formed on the other side in the optical axis direction (on the side opposite to the subject indicated by the arrow B / image side) up to the middle position of the small diameter portion. The valley portion of the female screw 72 has a closed end 722. Accordingly, when the guide member 70 rotates and the moving lens body 10 moves to the opposite side (image side) from the subject indicated by the arrow B, the end 722 of the valley portion of the female screw 72 of the guide member 70 and the moving lens The end portion 141 (see FIG. 10B) of the threaded portion of the male screw of the body 10 interferes to prevent further movement of the moving lens body 10.

  In this embodiment, the valley portion of the female screw 72 of the guide member 70 is in an open state without closing toward one side (subject side / object side indicated by arrow A) in the optical axis direction. As shown in FIG. 14, a C-shaped fastener 90 (stopper member) made of a metal linear body having a circular cross section is mounted along the valley portion of the female screw 72. Here, in the C-shaped fastener 90, the end 91 (the other end) is bent outward in the radial direction. On the other hand, as shown in FIGS. A small hole 76 into which the end 91 of the C-shaped fastener 90 is fitted is formed on the subject side in the axial direction. Further, the outer diameter dimension of the C-shaped fastener 90 is slightly larger than the inner diameter dimension of the valley portion of the female screw 72 of the guide member 70. For this reason, the C-shaped fastener 90 (stopper member) is attached to the female screw 72 in a state of being elastically deformed in the direction of reducing the diameter. Accordingly, since the C-shaped fastener 90 is mounted on the female screw 72 in a state in which an elastic restoring force is exerted to spread, and one end portion 91 is fitted in the small hole 76, the guide member 70 is provided. The female screw 72 is fixed along the valley portion. Therefore, when the guide member 70 rotates and the moving lens body 10 moves to the subject side (object side) indicated by the arrow A, the C-shaped fastener 90 attached to the valley portion of the female screw 72 of the guide member 70. End portion 92 (one end portion) and the end portion 142 (see FIG. 10B) of the crest portion of the male screw 14 of the moving lens body 10 interfere with each other, and the moving lens body 10 is further moved. Stop.

  Thus, in this embodiment, the stopper mechanism 8 that defines the movable range of the moving lens body 10 in the optical axis direction is configured. Here, the positional relationship between the C-shaped fastener 90 and the end portion 142 of the male screw 14 and the positional relationship between the end portion 141 of the male screw 14 and the end portion 722 of the female screw 72 correspond to the phase of the stepping motor mechanism 58. The moving lens body 10 is set to stop at the position.

(Lens driving device manufacturing method)
When manufacturing the lens driving device 1 of this embodiment, the stator 50, the rotor magnet 60, and the guide member 70 as the driving mechanism 5 are mounted on the base 21. As a result, inside the guide member 70, the moving lens body arrangement portion 7 is configured with the insertion port 6 facing the subject side. Further, the terminal block 80 is fixed to the upper surface of the protruding portion 520 of the second stator core 52, and the coil terminal 551 is connected to the terminals 81, 82, 83, 84.

  Next, the moving lens body 10 is inserted into the moving lens body placement portion 7 from the insertion opening 6. At this time, the valley portion of the female screw 72 formed on the inner peripheral surface of the guide member 70 is in an open state without closing toward one side (subject side / object side indicated by arrow A) in the optical axis direction. Therefore, the crest portion of the male screw 14 of the moving lens body 10 is easily inserted into the trough portion of the female screw 72 of the guide member 70.

  Next, the entire C-shaped fastener 90 is mounted along the valley portion of the female screw 72 of the guide member 70. At that time, the end 91 of the C-shaped fastener 90 is fitted into the small hole 76 of the guide member 70.

  Next, the cover 22 is covered so as to cover the stator 50, the rotor magnet 60, and the guide member 70. As a result, the guide member 70 is sandwiched and supported between the cover 22 and the base 21 so as to be rotatable around the optical axis while being prevented from moving in the optical axis direction.

  Next, after the coil spring 40 is overlaid on the upper surface of the moving lens body 10, the cap member 23 is disposed so as to overlap the hole 220 of the cover 22, and the cap member 23 is rotated clockwise. As a result, the cap member 22 is detachably attached to the cover 23 such that the thin portion 225 of the cover 22 is fitted and engaged between the flange-shaped upper surface portion 232 of the cap member 23 and the engagement protrusion 234. At this time, the protrusions 236, 237, and 238 of the cap member 23 are inserted into the guide grooves 151, 152, and 153 of the moving lens body 10, and the rotation prevention mechanism 16 is configured. Further, the angular positions of the guide grooves 151, 152, and 153 of the moving lens body 10 are defined by the angular positions of the protrusions 236, 237, and 238 of the cap member 23. Accordingly, the angular positions of the protrusions 236, 237, and 238 are set so that the moving lens body 10 stops at a position corresponding to the phase of the stepping motor mechanism 58.

  After temporarily fixing in this way, the flexible substrate 88 is connected to the upper end portions 810, 820, 830, 840, 850 of the terminals 81, 82, 83, 84, 85, and the inspection is performed in this state. As a result, if there is no problem, the cap member 23 is completely fixed to the cover 22 by a method such as adhesion. On the other hand, when a defect is found, the cap member 23 is rotated in the counterclockwise direction CCW, the cap member 23 is removed from the cover 22, and foreign matter or dirt is attached to the lens 2 or the like. Remove them in case. In some cases, the moving lens body 10 is replaced by removing the C-shaped fastener 90 from the female screw 72 of the guide member 70. Thereafter, the cap member 23 is temporarily fixed to the cover 22 and the inspection is performed again. If there is no problem, the cap member 23 is completely fixed to the cover 22 by bonding or the like.

  As described above, in this embodiment, the insertion port 6 is opened on the subject side in a state where the stator 50, the rotor magnet 60, and the guide member 70 constituting the drive mechanism 5 are mounted on the fixed side member 20 (base 21 and cover 22). A moving lens body arrangement unit 7 is configured. Therefore, after the moving lens body 10 is arranged in the moving lens body arranging portion 7 from the insertion opening 6, the cap member 23 is mounted on the insertion opening 6 side. Therefore, the assembly process can be simplified. In addition, since the moving lens body 10 can be removed from the moving lens body placement portion 7 simply by removing the cap member 23, it is possible to easily perform work on the moving lens body 10 such as removal of foreign matters and dirt from the lens 2. it can.

  In addition, since an engagement mechanism 24 that allows the cap member 23 to be attached to and detached from the cover is configured between the cap member 23 and the cover 22, the cap member 23 is attached to the cover 22 of the fixed-side member 20 by the engagement mechanism 24. After the temporary fixing, the assembling operation such as completely fixing the cap member 23 to the stationary member 20 can be performed.

  Further, the valley portion (spiral groove) of the female screw 72 formed on the inner peripheral surface of the guide member 70 is opened without closing toward one side (the subject side / object side indicated by the arrow A) in the optical axis direction. Therefore, when the moving lens body 10 is inserted into the moving lens body housing portion 7, the threaded portion (convex portion) of the male screw 14 can be formed by simply rotating the moving lens body 10 around the optical axis. It is easily inserted into the valley portion of the female screw 72. Further, the movable lens body 10 can be detached from the guide member 70.

  Further, the valley portion of the female screw 72 of the guide member 70 is in an open state without closing toward one side (subject side / object side indicated by arrow A) in the optical axis direction. The stopper 90 is configured by attaching the fastener 90 along the valley portion of the female screw 72. Therefore, even when the moving lens body 10 is inserted into the moving lens body housing portion 7, the moving lens body 10 is configured even when the crest portion of the male screw 14 is inserted into the trough portion of the female screw 72 of the guide member 70. It is possible to configure the stopper mechanism 8 that restricts the movement of the camera toward the subject. In addition, since the C-shaped fastener 90 is held by the female screw 72 with its own elastic restoring force, if the C-shaped fastener 90 is deformed, the C-shaped fastener 90 can be easily removed and disassembled. Easy.

  Further, since the rotation prevention mechanism 16 is configured for the moving lens body 10, when the rotational force of the guide member is transmitted to the moving lens body 10, the moving lens body 10 moves linearly along the optical axis. To do. Therefore, the movement position of the lenses 2 and 3 can be controlled by the rotation position of the guide member 70. For this reason, the precision of the movement position of the lenses 2 and 3 can be improved. Moreover, since the moving lens body 10 moves linearly, the lenses 2 and 3 do not rotate, so that the lens optical axis does not shift.

  Further, since the rotation prevention mechanism 16 uses guide grooves 151, 152, 153 and projections 236, 237, 238 formed in the moving lens body 10 and the cap member 23, when the cap member 23 is mounted. The rotation prevention mechanism 16 is configured. That is, the rotation prevention mechanism 16 is not configured at the stage before the cap member 23 is attached. Accordingly, the number of members mechanically connected to the moving lens body 10 in a state where the cap member 23 is not attached can be reduced, so that the assembly process of the lens driving device 1 can be simplified and the moving lens body can be removed by removing the cap member 23. It is also easy to remove 10.

(Main effects of this form)
As described above, in this embodiment, the ground terminal 85 is formed, and the upper end portion (external connection end portion) of the ground terminal 85 is the upper end portion (external connection) of the power supply terminals 81, 82, 83, 84. Are extended to the slope 86 (external connection region) of the terminal block 80 in which the connection terminals are collectively arranged. Therefore, the common flexible substrate 88 can be collectively connected to the power supply terminals 81, 82, 83, 84 and the ground terminal 85 by soldering. Therefore, the efficiency of soldering work can be increased. Further, since the lead wire for grounding can be omitted, the drive coil is not damaged by heat when soldering the lead wire for grounding to the case. Furthermore, no space is required for routing the lead wire for grounding.

  In addition, since the ground terminal 85 is formed as a protruding portion from the outer peripheral edge of the second stator core 52, the ground terminal 85 can be configured only by partially changing the mold when the stator core 52 is manufactured.

  Further, since the ground terminal 85 extends to the inclined surface 86 in a state where it is overlapped with the terminal block 80, the terminal block 80 is held by the ground terminal 85. Therefore, a simple structure such as adhesion can be adopted as the fixing structure of the terminal block 80.

  Furthermore, the power supply terminals 81, 82, 83, and 84 are fixed to the terminal block 80 in the middle in the length direction, and upper end portions 811, 821, 831, and 841 of the power supply terminals 81, 82, 83, and 84 (external connection) The lower end portions 810, 820, 830, and 840 (coil wire connection end portions) to which the coil ends 51 are connected are located on different surface sides of the terminal block 80. Therefore, when soldering the flexible substrate 88 or the like to the power supply terminals 81, 82, 83, 84, the heat does not damage the coil wire 551 connected to the lower ends 810, 820, 830, 840. .

  The ground terminal 85 protrudes from the second stator core 52 and bends in a direction toward the third stator core 53 in the axial direction, and the inclined surface 86 of the terminal block 80 is formed between the second stator core 52 and the third stator core 52. The third stator core 53 is disposed at a position that is biased toward the position where the third stator core 53 is positioned in the axial direction when viewed from the overlapping portion of the stator core 53. Accordingly, the flexible substrate 88 and the coil wire 551 can be connected within the range of the height dimension in which the four stator cores 51, 52, 53, 54 are laminated.

(Other embodiments)
The present invention is not limited to the above embodiment, and can be applied to, for example, a lens driving device that moves the lens moving body 10 to two locations that are separated in the optical axis direction. Moreover, in the said form, although the terminal block 80 was adhere | attached and fixed, you may employ | adopt the structure etc. which were pinched | interposed and fixed between the base 21 and the cover 22, for example. Moreover, in the said form, although the slope 86 of the terminal block 80 was made into the external connection area | region, it is good also considering other surfaces as an external connection area | region. Further, although the terminal block 80 is stacked on the ground terminal 85, a structure in which the ground terminal 85 penetrates the terminal block 80 may be adopted. Further, although the ground terminal 85 is projected from the second stator core 52, it may be projected from the other stator cores 51, 53 and 54. Further, not only the stator core but also the case 22 and the base 21 made of metal, the ground terminal 85 may be extended from these members. The ground terminal 85 may be arranged at a position other than the center of the power supply terminals 81, 82, 83, 84, and the terminals 81, 82, 83, 84, 85 are arranged in two rows. Also good.

(A), (b) is the top view and sectional drawing of the lens drive device to which this invention is applied, respectively. (A), (b) is the top view and sectional drawing of the drive coil which were respectively used for the lens drive device shown in FIG. (A), (b), (c), (d) is a plan view, a sectional view, a half sectional view, and an explanatory diagram of pole teeth of the first stator core used in the lens driving device shown in FIG. is there. (A), (b), (c), and (d) are a plan view, a cross-sectional view, an explanatory view of pole teeth, and a side surface of a terminal portion of the second stator core used in the lens driving device shown in FIG. FIG. (A), (b), (c), and (d) are a plan view, a cross-sectional view, an explanatory view of pole teeth, and a coil terminal drawer of the third stator core used in the lens driving device shown in FIG. It is a side view of a part. (A), (b), (c), (d) is the top view of a 4th stator core used for the lens drive device shown in FIG. 1, sectional drawing, a half sectional view, and explanatory drawing of a pole tooth, respectively. is there. (A), (b), (c), and (d) are a plan view and a bottom view of the terminal block of the lens driving device shown in FIG. 1, and a cross-sectional view taken along the line BB ′ of FIG. FIG. 8 is a cross-sectional view taken along the line AA ′ of FIG. (A), (b) is respectively the top view and sectional drawing of the rotor magnet of the lens drive device shown in FIG. (A), (b), (c), (d), and (e) are respectively a plan view, a side view, a cross-sectional view, a bottom view, and a spiral groove description of the guide member of the lens driving device shown in FIG. FIG. (A), (b) is respectively the top view and side view of a moving lens body of the lens drive device shown in FIG. (A), (b), (c), and (d) are a plan view, a bottom view, an explanatory view showing a cross-sectional structure of the cover of the lens driving device shown in FIG. It is sectional drawing. (A), (b), (c), (d) is the top view of the cap member of the lens drive device shown in FIG. 1, a bottom view, a side view, and sectional drawing, respectively. It is a side view of the backlash prevention spring of the lens drive device shown in FIG. It is a top view of the stopper member of the lens drive device shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lens drive device 2, 3 Lens 5 Drive mechanism 10 Moving lens body 16 Rotation prevention mechanism 20 Fixed side member 21 Base 22 Cover 23 Cap member 51-54 Stator core 55 Drive coil 60 Rotor magnet 70 Guide member 80 Terminal blocks 81 and 82 , 83, 84 Feed terminal 85 Ground terminal 86 Slope of terminal block (external connection area)
88 Flexible substrate 551 Coil wire L Optical axis

Claims (8)

In a lens driving device comprising: a moving lens body provided with a lens; and a driving means provided with a motor mechanism for reciprocating the moving lens body along the optical axis of the lens.
The drive means includes a plurality of power supply terminals to which coil wires of drive coils of the motor mechanism are electrically connected, and a ground terminal,
All the external connection end portions of the plurality of power supply terminals are arranged together in a common external connection region,
The lens driving device according to claim 1, wherein an end portion for external connection of the ground terminal extends to the external connection region and is located in the common external connection region together with the power supply terminal.   2. The lens driving device according to claim 1, wherein a common substrate is connected to the external connection end of the power supply terminal and the external connection end of the ground terminal. In Claim 1 or 2, the plurality of power supply terminals are fixed to a common terminal block having the external connection region,
2. The lens driving device according to claim 1, wherein the ground terminal has an external connection end located in the external connection region in a state of being overlapped with the terminal block or passing through the terminal block. In Claim 3, as for these electric power feeding terminals, the middle part of the length direction is fixed to the terminal stand,
The lens drive device according to claim 1, wherein the external connection end portions of the plurality of power supply terminals and the coil wire connection end portions to which the coil wires are connected are located on different surfaces of the terminal block.   5. The lens driving device according to claim 1, wherein the ground terminal is integrally formed with the stator core as a protruding portion from the outer peripheral edge of the stator core with respect to the drive coil. 6. The motor mechanism according to claim 5, wherein the stator core includes a first stator core, a second stator core, a third stator core, and a fourth stator core in which a plurality of pole teeth are bent at right angles at an inner peripheral edge of an annular flange portion. The stator cores are arranged in this order, and the drive coils are arranged between the first stator core and the second stator core and between the third stator core and the fourth stator core, respectively. And
The lens driving device according to claim 1, wherein the ground terminal protrudes from an outer peripheral edge of one of the four stator cores. 7. The ground terminal according to claim 6, wherein the ground terminal protrudes from an outer peripheral edge of one of the second stator core and the third stator core so that the external connection end portion is positioned in the axial direction of the other stator core. Bend towards
The lens drive, wherein the external connection region is disposed at a position biased in a direction in which the other stator core is positioned in the axial direction when viewed from the overlapping portion of the second stator core and the third stator core. apparatus.   8. The external connection end of the power supply terminal and the external connection end of the ground terminal according to claim 1, wherein the external connection end of the ground terminal is linearly arranged with the external connection end of the ground terminal as a center. A lens driving device.

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