JP2009151123A - Electric microlens unit and portable device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric microlens unit easy to be assembled with a reduced number of part items and a simplified structure, and reduced in manufacturing cost, and a portable device using the same. <P>SOLUTION: The electric microlens unit adapted to made photographic light incident on a solid-state imaging element while switching a standard photographic mode and a macro-photographic mode comprises a base 4, a lens 5, a lens frame supporting the lens, and a focus ring 7 supporting the lens frame so that the optical axis of the lens passes through the solid-state imaging element. The focus ring 7 is rotatable around the optical axis and movable in the optical axial direction on the base 4, and the distance of the focus ring 7 from the base 4 is varied depending on the rotating position thereof to the base 4. The unit further comprises a magnet 82 set on the focusing ring 7, an electromagnetic coil 9 set on the base 4, and an iron core 91 which is selectively magnetized by current-carrying to the electromagnetic coil 9 to selectively attract or repel the corresponding magnet 82. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric macro lens unit capable of switching between a standard photographing mode and a macro photographing mode in a camera incorporated in a mobile phone or the like.

  As a camera incorporated in a mobile phone or the like, there is a small module camera disclosed in Patent Document 1. In this small module camera, a hole is provided in a flexible substrate, an image sensor bare chip is arranged on the lower surface of the flexible substrate near the hole, and a wiring pattern on the image sensor bare chip and the lower surface of the flexible substrate is flip-chip mounted. On the other hand, on the flexible substrate, the lens holder is disposed at a position centered on the hole by fitting the lower surface protruding portion into the hole of the flexible substrate and aligning it. In this lens holder, a lens is held so that its optical axis passes through the hole and is perpendicular to the flexible substrate. An object of the invention of Patent Document 1 is to reduce the size of the module by reducing the dimension in the height direction of the module. The camera described in Patent Document 1 uses a single focus lens.

  On the other hand, Patent Document 2 discloses a zoom lens device capable of switching between a normal photographing mode and a macro photographing mode in a zoom lens device having a zoom function incorporated in a digital camera or the like. This macro area is provided near the wide end. In this prior art, a front group lens unit (subject side) and a rear group lens unit (image sensor side) are arranged on the same optical axis in a rotating cylinder, and are arranged on the outer surface of the lens holding cylinder of each unit. Engaging protrusions are provided, and the engaging protrusions are engaged with cam grooves provided so as to extend spirally on the inner surface of the rotating cylinder. When the rotating cylinder is rotated, the front group lens holding cylinder and the rear group lens holding cylinder are rotated relative to the rotation angle in the longitudinal direction of the rotating cylinder due to the engagement relationship between the cam groove and the engaging protrusion. The distance between the front group lens unit and the rear group lens unit also changes at the same time. In this way, by rotating the rotating cylinder, the zoom function is obtained by changing the positions and intervals of the front group lens and the rear group lens. Further, in this prior art, a macro region in which the distance between the front group lens unit and the rear group lens unit changes so as to have a local maximum value without proportionally changing is provided at the wide end side position. When the rotation of the rotating cylinder is applied to this macro area, the lens enters the macro photographing mode. Further, in the macro region, one side wall of the cam groove is formed in accordance with the zoom photographing trajectory, the other side wall of the cam groove is formed in conformity with the macro photographing trajectory, and the front lens group holding cylinder is formed of two pieces. The front lens group holding cylinder is driven by the solenoid so that the engaging projection moves along the orbit for zoom shooting in the zoom shooting mode by elastically urging the solenoid and two coil springs in opposite directions. In the macro shooting mode, the solenoid is driven to switch the solenoid so that the engaging projection moves along the macro shooting track of the cam groove.

  Therefore, in the small module camera disclosed in Patent Document 1, when it is attempted to perform macro photography, as disclosed in Patent Document 2, a solenoid, a coil, an engagement protrusion, and a groove are provided. .

JP 2003-230028 A JP 2001-281528 A

  When a camera is incorporated in a mobile phone or the like, there is a strong demand for downsizing and thinning because of the necessity as a mobile device. However, when switching between the standard photographing mode and the macro photographing mode, as disclosed in Patent Document 2, it is necessary to provide a solenoid, a coil, a groove, and an engaging protrusion, which increases the number of parts. There is a problem that the cost becomes high.

  The present invention has been made in view of such problems, and has an electric macro lens unit that has a small number of parts, has a simple configuration, is easy to assemble, and can reduce manufacturing costs, and a portable device using the same. The purpose is to provide equipment.

  An electric macro lens unit according to the present invention includes a base, a lens, and a mirror that supports the lens in an electric macro lens unit that switches between a standard photographing mode and a macro photographing mode and makes photographing light incident on an image sensor. A frame, a focus ring that supports the optical frame of the lens so that the optical axis of the lens passes through the imaging device, and the focus ring is rotatable on the base about the optical axis and moved in the optical axis direction. Engagement means for engaging with the base so that the distance of the focus ring from the base varies depending on the rotational position of the focus ring with respect to the base, and one or more installed on the focus ring A magnet, an electromagnetic coil installed on the base, and a corresponding magnet that is selectively magnetized by energizing the electromagnetic coil. It characterized by having a a core adsorbing or repulsion.

In this electric macro lens unit, the focus ring has a cylindrical shape,
The engaging means includes a plurality of first recesses formed by cutting out a plurality of locations on the upper end surface of the cylindrical focus ring, and the focus ring that is provided on the base and engages with the first recesses. A holding portion to hold, a second recess formed in a lower end surface of the focus ring corresponding to the first recess, a first cam surface formed with a step in the first recess, and the first A second cam surface formed with a step between the lower end surface of the focus ring in two recesses, a first engagement receiving portion provided in the holding portion and sliding on the first cam surface, A second engagement receiving portion that is provided on the upper surface of the base and slides on the second cam surface, and the focus ring moves in the optical axis direction by an amount corresponding to the step depending on a rotation position of the focus ring. It is preferable to do.

  Further, for example, the magnetic core has a U-shape, and one end portion of the magnetic core can be inserted into the electromagnetic coil to selectively attract or repel the corresponding magnet.

  Further, for example, the magnetic core has a U shape, one end of the magnetic core is inserted through the inside of the electromagnetic coil, and the magnet is provided at a position aligned with the one end of the magnetic core. One magnet and a second magnet provided at a position aligned with the other end, and the surfaces of the first magnet and the second magnet are magnetized to different magnetic poles.

  In this case, when current is not supplied to the electromagnetic coil, the magnet is attracted to the magnetic core by its magnetic force, and when current is passed through the electromagnetic coil, the magnet is magnetically repelled from the magnetic core. It can be configured to be separated from the front magnetic core.

  Furthermore, for example, the magnetic core is formed in a straight rod shape and the central portion thereof is inserted into the electromagnetic coil, and two magnets are provided on the outer peripheral surface of the focus ring at a predetermined interval in the circumferential direction. When one magnet is attracted to one end of the magnetic core, the other magnet is arranged at a position spaced from the other end of the magnetic core.

  In this case, the rotation direction of the focus ring can be switched by switching the direction of the current flowing through the electromagnetic coil.

  And the portable apparatus which concerns on this invention mounts one of the said electric macro lens units.

  In the present invention, a magnet is provided in the focus ring, and the standard mode and the macro mode can be easily selected by turning on and off the energization of the electromagnetic coil. The mechanism can be easily downsized and the manufacturing cost is low.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a plan view showing an electric macro lens unit according to a first embodiment of the present invention, FIG. 2 is a front sectional view thereof, FIG. 3 is a rear view thereof, and FIG. 4 is an extracted focus ring and base. FIG. 5A and FIG. 5B are rear views showing a magnet portion extracted to show the operation of this embodiment.

  The rectangular plate-shaped image sensor holder 1 has two circular recesses 11 and 12 formed on the upper surface thereof. A solid-state imaging device 2 such as a CCD (charge coupled device) is fixed on the bottom of the lower recess 11. And the transparent protective plate 3 which consists of a glass plate is being fixed on the edge part (namely, level | step difference between the upper recessed part 12 and the lower recessed part 11) of the upper stage recessed part 12, By this protective board 3, The solid-state image sensor 2 is sealed in the recess 11.

  A base 4 is fixed on the upper edge of the holder 1. The base 4 basically has a rectangular plate shape, and a circular hole 41 is formed at the center thereof. A ring-like protrusion 42 is provided on the upper surface of the base main body 43 so that the axial center thereof coincides with the center of the circular hole 41. A ring holding portion 44 is disposed at three equal positions around the centers of the protrusions 42 and the circular holes 41 so as to stand upward from the main body 43 of the base 4 in the vertical direction. The ring holding portion 44 has a rectangular shape with a rectangular cross section and extends vertically, and an engaging portion 45 extending toward the center is provided at the upper end thereof.

  A cylindrical focus ring 7 is fitted to the protrusion 42 of the base 4. The focus ring 7 has a step 79 formed at the lower part of the inner surface of the cylindrical main body 71 by notching the inner part. The inner diameter of the step 79 of the focus ring 7 is set to a dimension that matches the outer diameter of the protrusion 42 of the base 4 with an appropriate clearance, and the focus ring 7 has the step 79 at the protrusion 42. The base 4 is rotatably supported by fitting. In addition, since the focus ring 7 is supported by the base 4 with the step 79 fitted to the protrusion 42, the focus ring 7 is guided by the protrusion 42 and can move relative to the base 4 in the axial direction of the focus ring 7. It is.

  On the other hand, the lens 5 is composed of 3 to 5 lens groups arranged so that their optical axes coincide with each other, and this lens 5 is supported by a lens frame 6. The lens frame 6 has a bottomed cylindrical shape in which the lens 5 is housed, and the bottom portion serves as a lens holding portion 62. The lens holding portion 62 faces upward (forward toward the subject). Are arranged. The lens frame 6 has a circular light entrance hole 63 formed at the center of the lens holding portion 62. Further, a screw 61 is formed on the outer surface of the lens frame 6, and a screw 72 is also formed on the inner surface of the main body 71 of the focus ring 7, and the outer surface screw 61 is screwed onto the inner surface screw 72. The lens frame 6 is supported by the focus ring 7 together with the lens 5.

  FIG. 4 is a developed view of the focus ring 7 as seen from the outer surface side. The focus ring 7 has a main body 71 which is cylindrical as described above and is fitted to the protrusion 42 of the base 4 and is rotatably supported by the base 4. Upper cam portions are formed at three equal positions in the circumferential direction of the ring 7. In the upper cam portion, the cam surfaces 73, 74, and 75 are arranged in this order in the circumferential direction of the focus ring 7 by locally notching the upper end portion of the focus ring 7. The cam surface 73 has a low height, the cam surface 75 is formed at a high height, and the cam surface 74 connects the low cam surface 73 and the high cam surface 75 with an inclination. On the other hand, a lower cam portion is formed on the lower end edge of the focus ring 7 at three equal positions in the circumferential direction of the focus ring 7. In the lower cam portion, a cam surface 76 is formed by locally notching the lower end portion of the focus ring 7. The cam surface 76 and the lower end surface 78 of the focus ring 7 are connected by an inclined surface 77.

  The upper cam portion (cam surfaces 73, 74, 75) of the focus ring 7 is provided at a position that aligns with the ring holding portion 44 provided on the base 4. By engaging with the cam portion, the ring holding portion 44 holds the focus ring 7 on the base 4. A hemispherical cam receiving portion 46 is formed on the lower surface of the engaging portion 45, and this cam receiving portion 46 comes into contact with the cam surfaces 73, 74, 75.

  Further, as described above, the focus ring 7 is rotatably supported by the base 4 with the step 79 fitted to the protrusion 42, but the upper surface of the base 4 on which the lower end surface 78 of the focus ring 7 slides. 47, a hemispherical cam receiving portion 48 is formed at a position aligned with the lower cam portion (cam surface 76, inclined surface 77, lower end surface 78). The cam receiving portion 48 is formed on the cam surface 76 or the like. It comes to contact.

  When the cam receiving portion 46 is in contact with the high cam surface 75, the cam receiving portion 48 is in contact with the cam surface 76 and the cam receiving portion 46 is inclined cam. When the cam receiver 48 is in contact with the surface 74, the cam receiver 48 contacts the inclined surface 77, and when the cam receiver 46 is in contact with the low cam surface 73, the cam receiver 48 contacts the lower end surface 78. In this way, the interval in the circumferential direction of the focus ring is set.

  Accordingly, when the focus ring 7 rotates counterclockwise in FIG. 1 with respect to the base 4 from the state shown in FIG. 4, the cam receiving portion 46 slides on the high cam surface 75 toward the inclined cam surface 74. At this time, the cam receiving portion 48 of the lower cam portion slides on the cam surface 76, and the lower end surface 78 of the focus ring 7 and the upper surface 47 of the base 4 are in contact with each other. When the cam receiving portion 46 shifts to the inclined cam surface 74, the cam receiving portion 48 also shifts to the inclined surface 77, and when the cam receiving portion 46 shifts to the low cam surface 73, the cam receiving portion 48 also moves to the lower end surface 78. Migrate to Then, since the focus ring 7 can rotate around the optical axis and move in the optical axis direction with respect to the base 4, when the cam receiving portion 48 is in contact with the lower end surface 78, The receiving portion 46 is in contact with the low cam surface 73, and the lower end surface 78 of the focus ring 7 and the upper surface 47 of the base 4 are separated by the height of the cam receiving portions 46 and 48. As a result, the focus ring 7, and hence the lens frame 6 and the lens 5, are only the height of the cam receiving portions 46 and 48 with respect to the state where the lower end surface 78 of the focus ring 7 and the upper surface 47 of the base 4 are in contact. Then, it is in a state of moving toward the subject in front of the optical axis direction.

  On the base 4, an electromagnetic coil 9 is installed. Further, the U-shaped iron core 91 is disposed with one end portion 92 facing upward and the other end portion 93 facing downward, and the upper end portion 92 of the iron core 91 is inserted through the center of the electromagnetic coil 9. Yes.

  A magnetic coupling portion 81 of the focus lever 8 is fixed to the outer peripheral surface of the focus ring 7, and the magnetic coupling portion 81 is formed of a magnetic material such as an iron piece extending in the vertical direction. A magnet 82 is installed at a position corresponding to the upper end 92 of the iron core 91 in the magnetic coupling portion 81. For example, the magnet 82 is fixed to the magnetic coupling portion 81 so that the iron core 91 side is an N pole and the magnetic coupling portion 81 side is an S pole. It is assumed that the iron core 91 is magnetized such that the end 92 is an N pole and the lower end 93 is an S pole.

  Next, the operation of the electric macro lens unit configured as described above will be described with reference to FIGS. When the electromagnetic coil 9 is turned off, as shown in FIG. 5A, the N pole of the magnet 82 is attracted to the end 92 of the iron core 91 to form a magnetic circuit composed of the magnet 82 and the iron core 91. As shown in FIG. 1, the focus ring 7 is at a position rotated most clockwise. At this time, the cam receiving portion 46 is on the low cam surface 73 and the cam receiving portion 48 is on the lower end surface 78. Therefore, the lens frame 6 and the lens 5 are in the state farthest from the subject, and the light incident on the solid-state imaging device 2 from the lens 5 through the transparent protective plate 3 is in a standard state in which the background is in focus.

  On the other hand, when the electromagnetic coil 9 is energized, as shown in FIG. 5B, the upper end 92 of the iron core 91 is magnetized to the N pole, and the upper end 92 is magnetically repelled from the N pole of the magnet 82. Thus, the focus ring 7 rotates counterclockwise. Thereby, the focus ring 7 advances toward the subject side along the optical axis. In other words, the lens frame 6 and the lens 5 move toward the subject side and are positioned closest to the subject. As a result, the focus state becomes the macro position.

  In this way, when the energization of the electromagnetic coil 9 is turned on / off, the focus ring 7 rotates about the optical axis, the lens 5 moves along the optical axis, and the lens 5 moves to the solid-state imaging device 2. It is possible to select a standard photographing mode located on the near side and a macro photographing mode in which the lens 5 has advanced toward the subject. In this embodiment, the magnet 82 is provided on the focus ring, and the standard mode and the macro mode can be easily selected by turning on / off the energization of the electromagnetic coil 9, so that the number of parts is small, and the camera mechanism Is easy to downsize, and the manufacturing cost is low.

  Next, a second embodiment of the present invention will be described. FIG. 6 is a rear view showing the electric macro unit of the present embodiment, and FIGS. 7A and 7B are views showing the operation thereof. This embodiment differs from the first embodiment shown in FIGS. 1 to 5 only in that two magnets are provided. That is, in the iron core 91, the upper end portion 92 is inserted through the inside of the electromagnetic coil 9, and the lower end portion 93 extends to the same position as the tip of the end portion 92. The magnetic coupling portion 81 is provided with magnets 82 and 83 at positions aligned with the end portions 92 and 93, respectively. For example, when the electromagnetic coil 9 is energized, the upper end 92 of the iron core 91 is magnetized to the N pole and the lower end 93 is magnetized to the S pole. In this case, the magnet 82 facing the end 92 has an N pole at the tip and the S pole on the magnetic coupling portion 81 side, and the magnet 83 facing the end 93 has an S pole at the tip and an N pole on the magnetic coupling portion 81 side. It is.

  Next, the operation of the electric macro unit configured as described above will be described. First, when the electromagnetic coil 9 is turned off, the magnets 82 and 83 fixed to the magnetic coupling portion 81 are attracted to the end portions 92 and 93 of the iron core 91 as shown in FIG. Reference numeral 7 denotes a position rotated clockwise as shown in FIG. In this state, the standard shooting mode is set as in the first embodiment. On the other hand, when the electromagnetic coil 9 is energized, as shown in FIG. 7B, the end portion 92 of the iron core 91 is magnetized to the N pole and the end portion 93 is magnetized to the S pole. For this reason, the end 92 is magnetically repelled from the magnet 82 by the N poles, and the end 93 is magnetically repelled from the magnet 83 by the S poles. As a result, the magnetic connecting portion 81 of the lever rotates counterclockwise in FIG. 1, and the focus ring 7 rotates counterclockwise. As a result, the focus ring 7 advances to the subject side along the optical axis and enters the macro shooting mode.

  In this embodiment, in addition to the same effects as those of the first embodiment, since two magnets are provided in parallel, the focus ring 7 is rotated more stably by energizing the electromagnetic coil 9. There is an effect that can be.

  Next, a third embodiment of the present invention will be described. FIG. 8 is a plan view showing an electric macro lens unit according to a third embodiment of the present invention, FIG. 9 is a front sectional view thereof, FIG. 10 is a rear view thereof, and FIGS. 11 (a) and 11 (b) are this embodiment. It is a rear view which extracts and shows a magnet part in order to show this operation | movement.

  In the present embodiment, the iron core 94 has a straight bar shape, is inserted through the inside of the electromagnetic coil 9, and both end portions 95 and 96 thereof protrude from the electromagnetic coil 9. Two magnetic coupling portions 84 and 86 constituting the focus lever 8 are fixed to the outer peripheral surface of the focus ring 7 at both positions sandwiching the electromagnetic coil 9. A magnet 85 is fixed to the surface of the magnetic coupling portion 84 on the electromagnetic coil 9 side, and a magnet 87 is fixed to the magnetic connection portion 86 on the surface of the electromagnetic coil 9 side. As shown in FIG. 8, when the magnet 85 of the magnetic coupling portion 84 is attracted to the end portion 95 of the iron core 94, the magnetic coupling portion 84, 86 has the magnet 87 of the magnetic coupling portion 86 of the iron core 94. It is provided at a position separated from the end portion 96. Therefore, the focus ring 7 rotates between a state where the magnet 85 is attracted to the end portion 95 and a state where the magnet 87 is attracted to the end portion 96. The rotation range of the focus ring 7 is a range in which the cam receiving portion 46 shown in FIG. 4 can move in all areas of the high cam surface 75, the inclined cam surface 74, and the low cam surface 73 by the rotation of the focus ring 7. is there. Further, the magnet 85 is fixed to the magnetic coupling portion 84 so that the end 95 side has an N pole and the magnetic coupling portion 84 side has an S pole, and the magnet 87 has an N pole on the end 96 side and an S pole on the magnetic coupling portion 86 side. It is being fixed to the magnetic connection part 86 so that it may become.

  Next, the operation of the electric macro unit of this embodiment will be described. In the present embodiment, the direction of the current flowing through the electromagnetic coil 9 is switched. That is, in the standard imaging mode shown in FIG. 11A, the electromagnetic coil 9 is energized such that the end 95 of the iron core 94 has the S pole and the end 96 has the N pole. Then, since the magnet 85 is an N pole and the end portion 95 is an S pole, the magnet 85 is attracted to the end portion 95, and the magnet 87 and the end portion 96 are N poles, so that they repel each other magnetically. As a result, the focus ring 7 rotates clockwise as shown in FIG.

  On the other hand, in the macro photography mode shown in FIG. 11B, the electromagnetic coil 9 is energized such that the end 95 of the iron core 94 has an N pole and the end 96 has an S pole. Then, since the magnet 85 and the end portion 95 are N poles, they repel each other magnetically, and since the magnet 87 is an N pole and the end portion 96 is an S pole, the magnet 87 is attracted to the end portion 96. As a result, the focus ring 7 rotates counterclockwise as indicated by a broken line in FIG.

  As described above, the focus ring 7 rotates clockwise or counterclockwise depending on the energization direction of the electromagnetic coil 9, so that the standard shooting mode and the macro shooting mode can be switched by switching the energization direction of the electromagnetic coil 9. Either can be selected. In the present embodiment, once the electromagnetic coil 9 is switched to the state of FIG. 11 (a) or FIG. 11 (b) by energizing the electromagnetic coil 9, even if the energization to the electromagnetic coil 9 is stopped, the magnet The adsorption state between the core end and the core does not change. Therefore, after switching to the standard shooting mode or the macro shooting mode, it is possible to save electricity by stopping the energization of the electromagnetic coil 9.

  As described above, the configured electric macro lens unit of the present invention can be easily reduced in size and weight, and can be mounted on, for example, a mobile phone 100 as shown in FIG.

  In addition, this invention can be used for portable devices, such as a digital camera, a mobile phone, a video camera, PDA (personal digital assistance), a notebook computer, a wearable personal computer, a calculator, and an electronic dictionary, and is equipped with a camera unit. It can be used for all possible devices.

It is a top view which shows the electric macro lens unit which concerns on 1st Embodiment of this invention. It is the front sectional drawing similarly. It is the back view similarly. It is an expanded view which shows a focus ring and a base. (A) (b) is a rear view which extracts and shows a magnet part, in order to show operation | movement of this embodiment. It is a rear view which shows the electric macro unit of 2nd Embodiment of this invention. (A), (b) is a figure which shows the operation | movement. It is a top view which shows the electric macro lens unit which concerns on 3rd Embodiment of this invention. It is the front sectional drawing similarly. It is the back view similarly. (A) (b) is a rear view which extracts and shows a magnet part, in order to show operation | movement of this embodiment. It is a perspective view which shows the external appearance of a mobile telephone.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Holder, 2 ... Solid-state image sensor, 3 ... Protection board, 4 ... Base, 5 ... Lens, 6 ... Mirror frame, 7 ... Focus ring, 8 ... -Focus lever, 9 ... Electromagnetic coil, 11, 12 ... Recess, 41 ... Hole, 42 ... Projection, 43 ... Main body, 44 ... Ring holder, 45 ... Engagement part, 46, 48 ... cam receiving part, 47 ... upper surface, 61, 72 ... screw, 62 ... lens holding part, 63 ... entry hole, 71 ... main body, 73 ... low cam surface, 74 ... inclined cam surface, 75 ... high cam surface, 76 ... cam surface, 77 ... inclined surface, 78 ... lower end surface, 79 ... step, 81, 84, 86 ... magnetic coupling part, 82, 83, 85, 87 ... magnet, 91 ... iron core, 92, 93 ... end, 94 ... iron core, 95, 96 ... End

Claims (8)

In an electric macro lens unit that switches between a standard photographing mode and a macro photographing mode on an image sensor and makes photographing light incident, a base, a lens, a lens frame that supports the lens, and a lens frame that is attached to the lens. A focus ring that supports the optical axis so as to pass through the imaging device, and the focus ring is engaged with the base so as to be rotatable about the optical axis and movable in the optical axis direction on the base. Engaging means for engaging the focus ring so that the distance from the base differs depending on the rotation position of the ring with respect to the base, one or a plurality of magnets installed on the focus ring, and installed on the base And a magnetic core that is selectively magnetized by energizing the electromagnetic coil and selectively attracts or repels the corresponding magnet. Electric macro lens unit, wherein. The focus ring has a cylindrical shape,
The engaging means includes a plurality of first recesses formed by cutting out a plurality of locations on the upper end surface of the cylindrical focus ring, and the focus ring that is provided on the base and engages with the first recesses. A holding portion to hold, a second recess formed in a lower end surface of the focus ring corresponding to the first recess, a first cam surface formed with a step in the first recess, and the first A second cam surface formed with a step between the lower end surface of the focus ring in two recesses, a first engagement receiving portion provided in the holding portion and sliding on the first cam surface, A second engagement receiving portion that is provided on the upper surface of the base and slides on the second cam surface, and the focus ring moves in the optical axis direction by an amount corresponding to the step depending on a rotation position of the focus ring. The electric macro lens unit according to claim 1. 3. The magnetic core has a U-shape, and one end portion of the magnetic core can be inserted through the inside of the electromagnetic coil to selectively attract or repel the corresponding magnet. The electric macro lens unit described in 1. The magnetic core has a U-shape, one end of which is inserted through the inside of the electromagnetic coil, and the magnet is provided with a first magnet provided at a position aligned with the one end of the magnetic core; The second magnet is provided at a position aligned with the other end, and the surfaces of the first magnet and the second magnet are magnetized to magnetic poles different from each other. Or the electric macro lens unit of 2. The magnetic core has a straight rod shape, and a central portion thereof is inserted into the electromagnetic coil, and two magnets are provided on the outer peripheral surface of the focus ring at regular intervals in the circumferential direction. The electric motor according to claim 1 or 2, wherein when the magnet is attracted to one end of the magnetic core, the other magnet is separated from the other end of the magnetic core. Macro lens unit. When no current is supplied to the electromagnetic coil, the magnet is attracted to the magnetic core by its magnetic force, and when a current is passed through the electromagnetic coil, the magnet is separated from the front magnetic core by a magnetic repulsive force from the magnetic core. The electric macro lens unit according to claim 3 or 4, characterized in that: 6. The electric macro lens unit according to claim 5, wherein the rotation direction of the focus ring is switched by switching a direction of a current supplied to the electromagnetic coil. A portable device comprising the electric macro lens unit according to any one of claims 1 to 7.

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