JP2012242499A - Zoom mirror cell, imaging apparatus, and portable information terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a zoom mirror cell, imaging apparatus, and portable information terminal able to achieve a size reduction and shorten time required to determine a focal position, in a zoom camera module.SOLUTION: The zoom mirror cell comprises: a support frame 14 supported so as to be movable in an optical axis direction A by a fixed frame 30 and supporting zoom lenses 16 and 17; a first electromagnetic part 12 provided on this support frame 14; and a second electromagnetic part 13 provided on the fixed frame 30 and located opposite the first electromagnetic part 12. The support frame 14 abuts on the fixed frame 30 in a first abutting position P1 at one end in the optical axis direction A, and in a second abutting position at the other end. The zoom lenses 16 and 17 obtain a first zooming magnification by moving in the optical axis direction A from the first abutting position P1, and obtain a second zooming magnification by moving in the optical axis direction A from the second abutting position.

Description

  The present invention relates to a zoom lens frame, an imaging device including the zoom lens frame, and a portable information terminal including the imaging device.

In recent years, miniaturization of a zoom camera module has been demanded in a small imaging camera module.
Conventional imaging camera modules generally use a stepping motor as a drive source, and the size of the stepping motor has hindered miniaturization.

  Therefore, in the single-focus camera module, the techniques of Patent Documents 1 and 2 are proposed as a technique using an electromagnetic actuator using a principle such as a voice coil as a drive source or a technique using expansion and contraction of a piezoelectric element as a drive source. Has been.

  In the technique of Patent Document 1, a coil or a magnet is mounted on the lens support frame side that holds the lens, and a magnet or a coil is mounted on the base side, and is movable by an electromagnetic driving force generated by applying an electric current to the coil. The member is driven in the optical axis direction.

  In the technique of Patent Document 2, the movable member is movable along the vibration member, and the movable member is driven in the optical axis direction by expansion and contraction of the piezoelectric element.

JP 2008-52196 A JP 2008-197220 A

  However, the technology of Patent Document 1 cannot achieve a stroke because the movement amount is restricted by a spring, and thus the size can be reduced. However, the zoom camera has a relatively large lens movement amount compared to a single focus camera module. Not suitable for modules.

  On the other hand, in the technique of Patent Document 2, since the lens is held by the friction of the support member (shaft) that supports the movable member, depending on the posture, it is affected by gravity and the hysteresis of the movement amount cannot be ensured.

  Therefore, in the focus positioning in the technique of Patent Document 2, it is necessary to perform focus positioning from one end of the initial position of the actuator, and in the case of a zoom lens, it takes time to perform the focus positioning.

  The present invention has been made in view of the above-described problems, and in particular, in a zoom camera module having two zoom magnifications, it is possible to reduce the size and reduce the focusing positioning time. An object is to provide a lens frame, an imaging device, and a portable information terminal.

  In order to achieve the above-described object, a zoom lens frame that is one aspect of the present invention is supported by a fixed frame so as to be movable in the optical axis direction, and is provided with a support frame that supports a zoom lens, and a support frame. And a second electromagnetic force portion provided on the fixed frame and facing the first electromagnetic force portion, wherein the support frame is a first electromagnetic wave on one end side in the optical axis direction. The zoom lens contacts the fixed frame at the contact position and the second contact position on the other end side, and the zoom lens moves in the optical axis direction from the first contact position to achieve the first zoom magnification. The second zoom magnification is obtained by moving in the optical axis direction from the contact position.

  In order to achieve the above-described object, a zoom lens frame which is another aspect of the present invention is supported by a fixed frame so as to be movable in the optical axis direction, a support frame for supporting a zoom lens, and a support frame And a driving unit that moves the lens in the optical axis direction, and the support frame abuts the fixed frame at a first abutting position on one end side and a second abutting position on the other end side in the optical axis direction. Moves from the first contact position in the optical axis direction to form a first zoom magnification, and moves from the second contact position in the optical axis direction to form a second zoom magnification. To do.

In order to achieve the above-described object, an imaging apparatus according to another aspect of the present invention includes any one of the zoom lens frames described above.
In order to achieve the above-described object, an imaging apparatus according to another aspect of the present invention includes any one of the zoom lens frames described above and an image sensor that images the emitted light of the zoom lens frame. And

  In order to achieve the above-described object, a portable information terminal which is another aspect of the present invention includes any one of the imaging devices described above and a control unit that controls the imaging device.

  According to the present invention, in a zoom camera module having two zoom magnifications, a zoom lens frame, an imaging device, and a portable information terminal that can be miniaturized and that can reduce the focusing positioning time are provided. Can be provided.

It is sectional drawing which shows the imaging device which concerns on one embodiment of this invention. It is sectional drawing which shows the support frame etc. of the imaging device which concerns on one embodiment of this invention. It is sectional drawing for demonstrating the drive method of the imaging device which concerns on one embodiment of this invention. It is a front view which shows the portable information terminal which concerns on one embodiment of this invention. It is a rear view which shows the portable information terminal which concerns on one embodiment of this invention. It is a schematic block diagram which shows the control structure of the portable information terminal which concerns on one embodiment of this invention. It is sectional drawing which shows the focusing initial state in the wide angle end of the imaging device which concerns on one embodiment of this invention. It is sectional drawing which shows the focusing initial state in the telephoto end of the imaging device which concerns on one embodiment of this invention. It is explanatory drawing which shows the movement locus | trajectory to the focus position in the wide angle side of the zoom lens (support frame) in one embodiment of this invention. It is explanatory drawing which shows the movement locus | trajectory to the focus position in the telephoto side of the zoom lens (support frame) in one embodiment of this invention. It is explanatory drawing which shows the movement locus | trajectory to the focus position in the telephoto side of the zoom lens (support frame) in a comparative example. It is sectional drawing which shows the imaging device which concerns on other embodiment of this invention. It is a schematic block diagram which shows the control structure of the portable information terminal which concerns on other embodiment of this invention. It is the schematic of the drive part for demonstrating the focusing operation | movement of the imaging device which concerns on other embodiment of this invention.

  Hereinafter, a zoom lens frame, an imaging device, and a portable information terminal according to an embodiment of the present invention will be described with reference to the drawings.

<One embodiment>
FIG. 1 is a cross-sectional view showing an imaging apparatus 1 according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the support frame 14 and the like of the imaging apparatus 1.
FIG. 3 is a cross-sectional view for explaining a driving method of the imaging apparatus 1.

An imaging apparatus 1 illustrated in FIG. 1 includes a zoom lens frame 10, an imaging unit 20, and a fixed frame 30.
The zoom lens frame 10 includes a magnetic member 11, a first electromagnetic force unit 12, a second electromagnetic force unit 13, a support frame 14, a coil frame 15, zoom lenses 16 and 17, and a zoom lens shown in FIG. And a guide shaft 18. In the present embodiment, an example in which the first electromagnetic force unit 12 has magnets (divided pieces 12a and 12b) and the second electromagnetic force unit 13 has coils 13a to 13d will be described.

The imaging unit 20 includes an imaging element 21, a substrate 22, an imaging lens 23, a cover glass 24, and a cover glass holder 25.
The magnetic member 11 is a yoke provided along the circumferential direction of the zoom lenses 16 and 17, and is fixed to a ring-shaped coil frame 15 provided around the support frame 14.

  The first electromagnetic force unit 12 includes a magnet that is provided on the support frame 14 around the support frame 14 and is divided into two (plural) pieces 12a and 12b in the optical axis direction. These divided pieces 12a and 12b have a single-sided two-pole arrangement structure magnetized in N and S, respectively.

  The second electromagnetic force unit 13 includes a plurality of coils 13 a to 13 d provided on the inner side of the fixed frame 30, and a part of the second electromagnetic force unit 13 faces the first electromagnetic force unit 12. The plurality of coils 13 a to 13 d are fixed to the coil frame 15 inside the magnetic member 11.

  The plurality of coils 13a to 13d are arranged in the order of 13a to 13d so that the winding directions are alternated. Therefore, the winding direction of the coil 13a and the coil 13c is the same, and the winding direction of the coil 13b and the coil 13d is the same. As will be described later, when the support frame 14 is moved in the optical axis direction A, the current direction of the plurality of coils 13 a to 13 d is changed depending on the relative position with respect to the first electromagnetic force unit 12. In addition, in this Embodiment, although the 2nd electromagnetic force part 13 is illustrated by four of 13a-13d, it is not limited to this, A stroke is lengthened by providing more electromagnetic force parts. can do.

  The support frame 14 has a substantially square shape having a hollow portion with a circular cross section, and is supported so as to be movable in the optical axis direction A along, for example, two guide shafts 18 shown in FIG. . The guide shaft 18 guides the support frame 14 through the support frame 14 in the optical axis direction A at, for example, two opposing corners of the support frame 14.

  The support frame 14 supports a zoom lens 16 that is a meniscus lens, for example, located on the incident side in the optical axis direction A, and a zoom lens 17 that is a biconcave lens, for example, located on the exit side.

  As shown in FIG. 3, when a driving current is applied to the plurality of coils 13 a to 13 d of the second electromagnetic force unit 13, the electromagnetic driving force F acts on the magnet that is the first electromagnetic force unit 12, The support frame 14 moves along the guide shaft 18 shown in FIG. 2 (Fleming left-hand rule). The direction of the drive current is changed depending on the relative position with respect to the divided pieces 12a and 12b, which are magnets. Thereby, the stroke of the support frame 14 and the zoom lenses 16 and 17 can be extended.

  On the other hand, in a state where no drive current is applied, the support frame 14 moves the positions of the zoom lenses 16 and 17 by attracting the segment pieces 12a and 12b, which are magnets of the first electromagnetic force section 12, to the magnetic member 11. Hold.

  As will be described in detail later, the support frame 14 is preferably a convex portion provided at three or more positions on the fixed frame 30 at the first contact position P1 (wide angle end) shown in FIG. 6A (FIGS. 1 and 3). At 30a, the rear surface 14a contacts the fixed frame 30.

  Further, the support frame 14 abuts the fixed frame 30 at the front surface 14b at the convex portions 30b provided at preferably three or more positions of the fixed frame 30 at the second contact position P2 (telephoto end) shown in FIG. 6B. .

  As described above, the coils 13 a to 13 d and the magnetic member 11 are fixed to the coil frame 15. The coil frame 15 has four guide bodies (not shown) for winding the plurality of coils 13a to 13d. The coil frame 15 positions the magnetic member 11 on two surfaces, for example.

The image sensor 21 is mounted on the substrate 22 and images the emitted light from the zoom lens frame 1 and outputs an image signal.
The board | substrate 22 is connected to the control part 101 (refer FIG. 5) of the portable information terminal 100 mentioned later shown to FIGS. 4A-5 by the flexible board | substrate which is not illustrated, for example.

The imaging lens 23 is supported by the fixed frame 30 and focuses the light beam that has passed through the zoom lens frame 10 on the imaging device 21.
The cover glass 24 is disposed between the imaging lens 23 and the imaging element 21, and an infrared cut filter is provided on the surface by, for example, vapor deposition.

  The cover glass holder 25 is supported by the substrate 22 and supports the cover glass 24. Further, the cover glass holder 25 is shaped to be fitted to the fixed frame 30, and the cover glass holder 25 is positioned with respect to the fixed frame 30 by being fitted to the fixed frame 30.

4A and 4B are a front view and a rear view showing the portable information terminal 100 according to the embodiment of the present invention.
FIG. 5 is a schematic block diagram showing a control configuration of the portable information terminal 100.

  4A and 4B, the portable information terminal 100 includes the above-described imaging device 1, the control unit 101 (see FIG. 5), the display unit 102, the speaker 103, the microphone 104, and the illumination unit 105. . Examples of the portable information terminal 100 include a mobile phone with a camera and a tablet, but are not limited thereto.

  The control unit 101 controls each unit such as the imaging device 1 of the portable information terminal 100. When controlling the imaging apparatus 1, the control unit 101 causes the imaging apparatus 1 to perform imaging under a predetermined condition based on an externally input signal or the like.

The display unit 102 also serves as a touch panel type input unit and can input a signal to the control unit 101.
The speaker 103 and the microphone 104 are arranged with the display portion 102 interposed therebetween and have a function as a telephone.

  The illumination unit 105 irradiates the imaging target with illumination light, and enables the imaging device 1 to capture an image even in a dark part.

Hereinafter, the focusing operation for the two focal points of the wide angle side and the telephoto side of the imaging apparatus 1 will be described.
FIG. 6A is a cross-sectional view showing an initial focusing state at the wide-angle end of the imaging apparatus 1.
FIG. 6B is a cross-sectional view showing an initial focusing state at the telephoto end of the imaging apparatus 1.

FIG. 7A is an explanatory diagram showing a movement locus of the zoom lenses 16 and 17 (support frame 14) to the in-focus position on the wide angle side.
FIG. 7B is an explanatory diagram showing a movement locus of the zoom lenses 16 and 17 (support frame 14) to the in-focus position on the telephoto side.

  First, regarding the focusing operation on the wide-angle side, in order to obtain an initial position, the control unit 101 shown in FIG. 5 has a rear surface 14a of the support frame 14 protruding from the fixed frame 30 as shown in FIGS. 6A and 7A. The support frame 14 is moved to the first contact position P1 that contacts the portion 30a.

  Further, as illustrated in FIG. 7A, the control unit 101 moves the support frame 14 stepwise in the optical axis direction A to search for a focus position. At this time, the control unit 101 processes the imaging signal input from the imaging element 21 for each step, and acquires the contrast value of the captured image. Then, the control unit 101 acquires the position of the support frame 14 with the best contrast value as the in-focus position.

  When the in-focus position has been acquired, the control unit 101 once again moves the support frame 14 to the first contact position P1 where the rear surface 14a contacts the convex portion 30a of the fixed frame 30. Then, the control unit 101 steps the support frame 14 to the acquired in-focus position. At this in-focus position, the zoom lenses 16 and 17 have a first zoom magnification.

  Next, regarding the focusing operation on the telephoto side, in order to obtain an initial position, the control unit 101 causes the front surface 14b of the support frame 14 to become the convex portion 30b of the fixed frame 30 as shown in FIGS. 6B and 7B. The support frame 14 is moved to the second contact position P2 in contact.

  Further, as illustrated in FIG. 7B, the control unit 101 moves the support frame 14 in the optical axis direction A and searches for the in-focus position. When the in-focus position is acquired, the control unit 101 once again moves the support frame 14 to the second contact position P <b> 2 where the front surface 14 b is in contact with the convex portion 30 b of the fixed frame 30. Then, the control unit 101 steps the support frame 14 to the acquired in-focus position. At this in-focus position, the zoom lenses 16 and 17 have a second zoom magnification.

  On the other hand, in the comparative example of the focusing operation on the telephoto side shown in FIG. 8, the contact position for initial positioning is provided only on the wide angle side, so the focusing on the wide angle side of the present embodiment shown in FIG. 7A. When the in-focus position is on the telephoto side, the control unit moves the support frame from the wide-angle side to the telephoto side in the optical axis direction, searches for the in-focus position, acquires the in-focus position, and then again. Return the support frame to the initial position at the wide-angle end. Then, the control unit moves to the in-focus position acquired on the telephoto side.

  Thus, in the telephoto side focusing operation in the comparative example of FIG. 8, when the in-focus position is on the telephoto side, after obtaining the in-focus position, the support frame is again returned to the initial position at the wide-angle end. For this reason, the focusing positioning time is longer than the focusing operation on the telephoto side in the present embodiment of FIG. 7B.

  In the embodiment described above, the zoom lenses 16 and 17 (support frame) are formed by the first electromagnetic force portion 12 provided on the support frame 14 and the second electromagnetic force portion 13 provided on the fixed frame 30. 14) The initial position is set at the first contact position P1 and moved in the optical axis direction A to obtain the first zoom magnification (the in-focus position in FIG. 7A), and at the second contact position P2. The initial position is set and moved in the optical axis direction A to obtain the second zoom magnification (the in-focus position in FIG. 7B). By providing the first contact position P1 and the second contact position P2 in this way, the initial position can be obtained, and the focusing positioning time can be shortened compared to the comparative example.

  Therefore, the focusing operation of the zoom lens having two zoom magnifications can be performed in a short time without using a large drive source such as a stepping motor. Therefore, according to the present embodiment, the zoom camera module 10, the imaging device 1, and the portable information terminal 100 that can be miniaturized and can reduce the focusing positioning time in the zoom camera module. Can provide.

  In the present embodiment, the first electromagnetic force unit 12 and the second electromagnetic force unit 13 are arranged around the zoom lenses 16 and 17 (support frame 14), so that a conventional stepping motor is used. In comparison, it is possible to reduce the size.

  In the present embodiment, the plurality of coils 13a to 13d are arranged in the order of 13a to 13d so that the winding directions are alternated, for example, and when the support frame 14 is moved in the optical axis direction A, the first coil The current directions of the coils 13 a to 13 d are changed depending on the relative position with the electromagnetic force unit 12. Therefore, the stroke of the support frame 14 and thus the zoom lenses 16 and 17 can be extended.

  In the present embodiment, the support frame 14 is fixed at the convex portions 30a and 30b of the fixed frame 30 at the first contact position P1 (wide-angle end) and the second contact position P2 (telephoto end). 30 abuts. Thus, by making the contact position a convex portion, the initial position can be determined more accurately.

  In the present embodiment, the support frame 14 has, for example, the protrusions 30a and 30b of the fixed frame 30 at the first contact position P1 (wide angle end) and the second contact position P2 (telephoto end), respectively. Three places are provided to contact the fixed frame 30. Therefore, it is possible to suppress positional deviation such as tilting of the support frame 14 and thus the zoom lenses 16 and 17 at the first contact position P1 (wide angle end) and the second contact position P2 (telephoto end). In addition, a convex part should just be provided in at least one of the support frame 14 and the fixed frame 30. FIG.

  In the present embodiment, the first electromagnetic force portion 12 provided on the support frame 14 has magnet split pieces 12a and 12b, and the second electromagnetic force portion 13 provided on the fixed frame 30 is a coil. Although it has 13a-13d, it is also possible for the 1st electromagnetic force part 12 to have a coil, and to make it the 2nd electromagnetic force part 13 have a magnet.

  Further, in order to alternate the winding directions of the plurality of coils 13a to 13d, it is sufficient to have at least three coils. Further, if there are two coils as the plurality of coils, the stroke of the support frame 14 and the zoom lenses 16 and 17 can be extended.

  Further, the support frame 14 and the fixed frame 30 are preferably in contact with each other at a convex portion provided on at least one side. For example, the support frame 14 and the fixed frame 30 may be in contact with each other as long as they can be positioned by contact. Good.

  Further, the support frame 14 and the fixed frame 30 may be in contact with each other through a member provided integrally with one.

<Other embodiments>
FIG. 9 is a cross-sectional view showing an imaging apparatus 2 according to another embodiment of the present invention.
The imaging device 2 of the present embodiment includes an imaging unit 20 similar to the imaging unit 20 of the imaging device 1 of the above-described embodiment. Therefore, the description about the imaging unit 20 is omitted.

The imaging device 2 illustrated in FIG. 9 includes a zoom lens frame 40, an imaging unit 20, and a fixed frame 50.
The zoom lens frame 40 includes a drive unit 41, a support frame 42, and zoom lenses (reference numerals 16 and 17 in the above-described embodiment) that are not shown in the cross section of FIG.

The drive unit 41 includes a piezoelectric element 41a, a holding member 41b, a vibration shaft 41c, and an elastic member 41d, and moves the support member 42 in the optical axis direction A.
The piezoelectric element 41a is formed by laminating a large number of piezoelectric plates (shown as two layers in FIG. 9), and expands and contracts when a voltage is applied.

The holding member 41b cantilever-holds the piezoelectric element 41a at one end in the expansion / contraction direction and is made of a metal material having a mass.
The vibration shaft 41c is a rod-shaped member coupled to the other end in the expansion / contraction direction of the piezoelectric element 41a, and is formed of a hard material with good sliding property.

The elastic member 41d is, for example, a tension spring or a leaf spring that applies a frictional force between the vibration shaft 41c and the support frame 42.
The support frame 42 has a substantially cylindrical shape, and can be moved in the optical axis direction A by, for example, two guide shafts (see the guide shaft 18 in FIG. 2) by the fixed frame 50 as in the above-described embodiment. Supported by The support frame 42 supports a zoom lens (not shown).

At the first contact position P1 (wide-angle end) shown in FIG. 9, the support frame 42 contacts the fixed frame 50 at the rear surface 42a at the convex portions 50a provided at three or more positions of the fixed frame 50.
Further, the support frame 42 abuts the fixed frame 50 at the front surface 42b at the convex portions 50b provided at preferably three or more positions of the fixed frame 50 at the second contact position (telephoto end).

FIG. 10 is a schematic block diagram showing a control configuration of portable information terminal 200 according to the present embodiment.
Since the schematic configuration of the portable information terminal 200 is the same as that of the portable information terminal 100 according to the embodiment shown in FIGS. 4A and 4B, the description thereof is omitted.

  The control unit 201 controls each unit such as the imaging device 2 of the portable information terminal 200. When controlling the imaging apparatus 2, the control unit 201 causes the imaging apparatus 2 to perform imaging under a predetermined condition based on a signal input from the outside.

Hereinafter, the focusing operation for the two focal points on the wide-angle side and the telephoto side of the imaging apparatus 2 will be described.
FIG. 11 is a schematic diagram of the drive unit 41 for explaining the focusing operation of the imaging apparatus 2.
When the control unit 201 illustrated in FIG. 10 applies a pulse voltage to the piezoelectric element 41a-1 illustrated in FIG. 11A, the piezoelectric element 41a-1 expands and vibrates, and at the same time, the vibration shaft 41c-1 vibrates in the axial direction. Then, by gradually raising the pulse voltage, the piezoelectric element 41a-1 extends relatively slowly as shown in FIG. 11B (41a-2).

  Accordingly, the vibration shaft 41c-1 moves in the direction away from the holding member 41b (one A1 in the optical axis direction) (41c-2), and accordingly, the support frame 42-1 (shown simply in FIG. 11). Also move stepwise in the same direction A1 (42-2).

  On the other hand, when the control unit 201 causes the pulse voltage to rapidly fall, the piezoelectric element 41a-2 rapidly contracts and returns to the initial length as shown in FIG. 11C (41a-3). At this time, the vibration shaft 41c-2 also rapidly moves in the direction toward the holding member 41b (the other side A2 in the optical axis direction) (41c-3), but the support frame 42 remains in that position due to inertia or only slightly. It moves in the direction of the holding member 41b.

  Therefore, by continuously applying such a pulse voltage, the support frame 42 moves little by little in the A1 direction according to the number of pulses. Since a frictional force is applied between the vibration shaft 41c and the support frame 42 by the elastic member 41d, the support frame 42 is positioned by the frictional force with the vibration shaft 41d when no pulse voltage is applied. Is retained.

  The control unit 201 processes a signal input from the image sensor 21 for each step of the support frame 42 to obtain a contrast value of the captured image. And the control part 201 acquires the position of the support frame 42 in which this contrast value becomes the best as a focus position.

  The focusing operation is the same as that of the above-described embodiment, and the control unit 201 has the first contact position where the rear surface 42a of the support frame 42 is in contact with the convex portion 50a of the fixed frame on the wide angle side. When the support frame 42 is moved from P1 (wide angle end) and the in-focus position is acquired, the control unit 201 once again contacts the support frame 42 with the first contact position where the rear surface 42a contacts the convex portion 50a of the fixed frame 50. Move to P1 (wide angle end). Then, the control unit 201 steps the support frame 42 to the above-described acquired focus position. At this in-focus position, the zoom lens has a first zoom magnification.

  Next, regarding the focusing operation on the telephoto side, in order to determine the initial position, the control unit 201 causes the support frame 42 to come into contact with the convex portion 50b of the fixed frame 50 with the front surface 42b in a second contact position (not shown). Move to (telephoto end).

  Further, the control unit 201 steps the support frame 42 in the optical axis direction A to search for a focus position. When the in-focus position is acquired, the control unit 201 once again moves the support frame 42 to the second contact position (telephoto end) where the front surface 42b contacts the convex portion 50b of the fixed frame 50. Then, the control unit 201 steps the support frame 42 to the above-described acquired focus position. In this in-focus position, the zoom lens has a second zoom magnification.

  In the other embodiments described above, the zoom lens (support frame 42) is moved in the optical axis direction A at the first contact position P1 by the drive unit 41 and moved to the first zoom position. A magnification (focusing position on the wide-angle side) is set, an initial position is set at the second contact position P2, and moved in the optical axis direction A to form a second zoom magnification (focusing position on the telephoto side). Thus, by providing the first contact position P1 and the second contact position P2, it is possible to shorten the focusing positioning time as compared with the comparative example.

  Therefore, the focusing operation can be performed in a short time without using a large drive source such as a stepping motor. Therefore, according to the present embodiment, in the zoom camera module (imaging device 2), the zoom lens frame 40, the imaging device 2, and the like can be reduced in size and the focusing positioning time can be shortened. And the portable information terminal 200 can be provided.

  Further, in the present embodiment, the support frame 42 is fixed to the fixed frame 50 at the convex portions 50a and 50b of the fixed frame 50 at the first contact position P1 (wide angle end) and the second contact position (telephoto end). Abut. Thus, by making the contact position a convex portion, the initial position can be determined more accurately.

  In the present embodiment, the drive unit 41 includes a piezoelectric element 41a. Therefore, the focusing operation can be performed with a simple configuration, and further downsizing can be realized. In the present embodiment, a piezoelectric element is used as the drive unit 41, but the present invention is not limited to this.

In addition, although hatching is described in drawing, the material of each part is not limited by the kind of hatching.
In addition, the present invention is not limited to the above-described embodiments, and various improvements and changes can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Imaging device 2 Imaging device 10 Zoom lens frame 11 Magnetic member 12 1st electromagnetic force part 12a, 12b Division piece (magnet)
13 Second electromagnetic force portion 13a to 13d Coil 14 Support frame 14a Rear surface 14b Front surface 15 Coil frame 16, 17 Zoom lens 18 Guide shaft 20 Imaging unit 21 Imaging element 22 Substrate 23 Imaging lens 24 Cover glass 25 Cover glass holder 30 Fixed frame 30a, 30b Convex part 40 Zoom lens frame 41 Drive part 41a Piezoelectric element 41b Holding member 41c Vibration shaft 41d Elastic member 42 Support frame 42a Rear face 42b Front face 50 Fixed frame 50a, 50b Convex part 100 Portable information terminal 101 Control part 102 Display part 103 Speaker 104 Microphone 105 Illumination unit 200 Portable information terminal 201 Control unit

Claims (11)

A support frame that is supported by the fixed frame so as to be movable in the optical axis direction, and that supports the zoom lens;
A first electromagnetic force portion provided on the support frame;
A second electromagnetic force portion provided on the fixed frame and facing the first electromagnetic force portion,
The support frame contacts the fixed frame at a first contact position on one end side in the optical axis direction and a second contact position on the other end side,
The zoom lens moves from the first contact position in the optical axis direction to obtain a first zoom magnification, and moves from the second contact position in the optical axis direction to move to a second zoom magnification. A zoom lens frame characterized by that.   2. The zoom lens frame according to claim 1, wherein the first electromagnetic force unit includes a magnet provided on the support frame and divided into a plurality of pieces in the optical axis direction.   2. The zoom lens frame according to claim 1, wherein the second electromagnetic force part has a plurality of coils, and a part thereof faces the first electromagnetic force part.   4. The zoom mirror according to claim 3, wherein when the plurality of coils move the support frame, the current direction of the plurality of coils is changed depending on a relative position with respect to the first electromagnetic force unit. frame.   The support frame is in contact with the fixed frame at a convex portion provided on at least one of the support frame and the fixed frame at the first contact position and the second contact position. The zoom lens frame according to claim 1. A support frame that is supported by the fixed frame so as to be movable in the optical axis direction, and that supports the zoom lens;
A drive unit that moves the support frame in the optical axis direction;
The support frame contacts the fixed frame at a first contact position on one end side in the optical axis direction and a second contact position on the other end side,
The zoom lens moves from the first contact position in the optical axis direction to obtain a first zoom magnification, and moves from the second contact position in the optical axis direction to move to a second zoom magnification. A zoom lens frame characterized by that.   The support frame is in contact with the fixed frame at a convex portion provided on at least one of the support frame and the fixed frame at the first contact position and the second contact position. The zoom lens frame according to claim 6.   The zoom lens frame according to claim 6, wherein the driving unit includes a piezoelectric element.   An imaging apparatus comprising the zoom lens frame according to any one of claims 1 to 8. The zoom lens frame according to any one of claims 1 to 8,
An image sensor for imaging light emitted from the zoom lens frame;
An imaging apparatus comprising: An imaging device according to claim 9;
A control unit for controlling the imaging device;
A portable information terminal comprising: