JP2011158714A - Camera shake prevention unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera shake prevention unit configured to control the stopping position of a lens in a stable state at all times by making an unstable gap occurring between components stably stay in a predetermined direction. <P>SOLUTION: The camera shake prevention unit includes a control spring 10 which connects a slide member to a holder via a groove formed in one direction orthogonal to the optical axis of the photographic lens 9 and balls 3a, 3b, 3c, and 3d fitted in the groove, and which presses the slide member to the holder 1 via the balls. The slide member is connected to the holder via a groove formed in other direction orthogonal to the optical axis of the photographic lens 9 and balls 3a, 3b, 3c, and 3d fitted in this groove. The slide member 7 is driven in the one direction by a first permanent magnet and a first coil 5a along the groove formed in the one direction. Further, the slide member 7 is driven in the other direction by a second permanent magnet 6b and a second coil 5b along the groove formed in the other direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a camera shake prevention unit that corrects blurring by moving a photographic lens so that the influence does not appear on a photographic screen when a camera body shakes in absolute space during photography.

  As a conventional camera shake prevention unit, for example, one described in Japanese Patent Application Laid-Open No. 2009-229789 is known. According to the technical contents disclosed in the patent publication, by individually controlling the currents passed through the electromagnets 321 to 324, the angle θ is shifted between the optical axis of the lens and the lens central axis, and the object I try to aim at things.

JP2009-229789 (see FIG. 13)

  However, in the above prior art, since the angle θ is shifted between the optical axis of the lens and the center axis of the lens and the object is aimed, a gap for shifting the optical axis angle θ of the lens is used. Space is needed. Furthermore, a gap due to a manufacturing error between individual parts also occurs. In addition, this gap space is a gap that is not always determined at the time of individual photographing, but always changes and becomes an unstable element every time the operation is performed. Therefore, the control when shifting the angle θ between the optical axis of the lens and the central axis of the lens tends to be unstable.

  An object of the present invention is to provide a camera shake prevention unit that can stably control the lens stop position in a stable state without causing such an unstable gap and stabilizing the gap in a predetermined direction. Is to provide.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a photographing lens is attached so as to be movable in the optical axis direction, and a movable slide member is housed in a holder, and the slide is based on a camera shake detection signal. In the camera shake prevention unit that moves the photographic lens by operating the member, the slide member is coupled to the holder via a groove formed in one direction orthogonal to the optical axis of the photographic lens and a ball fitted to the groove. A control spring that presses the ball toward the holder with the ball interposed therebetween, and the slide member is provided in the holder via a groove formed in another direction perpendicular to the optical axis of the photographic lens and the ball fitted to the groove. The slide member is driven in the one direction along a groove formed in the one direction by a first permanent magnet and a first coil; Further, the control spring is fixed to the holder by being driven in the other direction along a groove formed in the other direction by a second permanent magnet and a second coil. To do.

  According to a second aspect of the present invention, a photographing lens is attached so as to be movable in the direction of the optical axis, and a movable slide member is housed in a holder, and the slide member is operated based on a camera shake detection signal to photograph. In the camera shake prevention unit for moving the lens, the slide member is coupled to the holder through a groove formed in one direction orthogonal to the optical axis of the photographing lens and a ball fitted thereto, and the ball is moved toward the holder. The slide member is coupled to the holder via a groove formed in another direction perpendicular to the optical axis of the photographic lens and a ball fitted to the control spring; Driven in the one direction along a groove formed in the one direction by the first permanent magnet and the first coil; Driven in the other direction along a groove formed in the other direction by a second coil, and a feedback magnet is attached to the slide member corresponding to the one direction and the other direction. A hall sensor is fixed at the opposite position, and the position of the slide member is controlled by controlling energization to the first and second coils based on the output signal of the hall sensor, It is configured to be attached to a holder.

  Furthermore, in the invention described in claim 3, the photographing lens is attached so as to be movable in the direction of the optical axis, and a movable slide member is housed in a holder, and the slide member is operated based on a camera shake detection signal to photograph. In the camera shake prevention unit for moving the lens, the camera has a control spring that presses the slide member toward the holder through a ball fitted to a recess formed in the slide member, and the slide member has an optical axis of the photographing lens. The second slide member is coupled to the second slide member through a groove formed in one direction orthogonal to the ball and a ball fitted to the groove, and the second slide member is formed in the other direction orthogonal to the optical axis of the photographing lens. The slide member is coupled to the holder via a groove and a ball fitted to the groove, and the slide member is attached with a first permanent magnet and the first coil is used to Driven in one direction along a groove formed in the direction, the second slide member is attached with a second permanent magnet, and the other direction along the groove formed in the other direction by a second coil The control spring is configured to be fixed to the holder.

  Further, according to the present invention, a photographing lens is attached so as to be movable in the optical axis direction, and a movable slide member is housed in a holder, and the slide member is operated based on a camera shake detection signal to photograph. In the camera shake prevention unit for moving the lens, the camera has a control spring that presses the slide member toward the holder through a ball fitted to a recess formed in the slide member, and the slide member has an optical axis of the photographing lens. The second slide member is coupled to the second slide member through a groove formed in one direction orthogonal to the ball and a ball fitted to the groove, and the second slide member is formed in the other direction orthogonal to the optical axis of the photographing lens. The slide member is coupled to the holder via a groove and a ball fitted to the groove, and the slide member is attached with a first permanent magnet and the first coil is used to Driven in one direction along a groove formed in the direction, the second slide member is attached with a second permanent magnet, and the other direction along the groove formed in the other direction by a second coil A feedback magnet is attached to the slide member corresponding to the one direction, and a hall sensor is fixed at a position facing the feedback magnet, and the second slide member is attached to the second direction in the other direction. Correspondingly, a second feedback magnet is attached and a second Hall sensor is fixed at a position facing the second feedback magnet. Based on the output signals of these two Hall sensors, the first and second And controlling the positions of the slide member and the second slide member by controlling energization to the coils of the Pulling is characterized in that it is configured to be secured to the holder.

  According to the first aspect of the present invention, the slide member is coupled to the holder via a groove formed in one direction orthogonal to the optical axis of the photographing lens and a ball fitted to the groove, and to the holder side. The slide member is coupled to the holder via a groove formed in another direction perpendicular to the optical axis of the photographic lens and a ball fitted to the control spring. The member is driven in the one direction along the groove formed in the one direction by the first permanent magnet and the first coil, and further formed in the other direction by the second permanent magnet and the second coil. The anti-shake unit is configured to be driven in the other direction along the groove and the control spring is fixed to the holder.

  That is, according to the first aspect of the present invention, the slide member is driven in the one direction along the groove formed in the one direction by the first permanent magnet and the first coil, and further the second The control spring that is driven in the other direction along the groove formed in the other direction by the permanent magnet and the second coil and presses the slide member toward the holder is fixed to the holder. It is configured. Therefore, the gaps between these components are always biased in a predetermined direction, and the unstable factors of operation caused by the gap between the parts set in advance for manufacturing errors and stabilization of the parts are compared with the conventional products. Camera shake prevention unit that does not affect product performance.

  According to the second aspect of the present invention, a feedback magnet is attached to the slide member corresponding to the one direction and the other direction, and a hall sensor is fixed at a position facing the feedback magnet. The position of the slide member is controlled by controlling energization to the first and second coils based on the output signal of the Hall sensor. Accordingly, it is possible to provide a camera shake prevention unit capable of controlling the lens position at an accurate position corresponding to the camera shake prevention signal.

  According to a third aspect of the present invention, the slide member is coupled to the second slide member via a groove formed in one direction orthogonal to the optical axis of the photographing lens and a ball fitted to the groove. The second slide member is coupled to the holder via a groove formed in another direction orthogonal to the optical axis of the photographic lens and a ball fitted thereto, and the first permanent magnet is attached to the slide member Driven in the one direction along the groove formed in the one direction by the first coil, and the second slide member is formed in the other direction by the second coil with a second permanent magnet attached thereto. The control spring is configured to be fixed to the holder by being driven in the other direction along the groove.

  That is, the slide member and the second slide member are coupled to each other via a groove formed in one direction and the other direction orthogonal to the optical axis of the photographing lens and a ball fitted thereto, respectively. It is configured to be coupled to the holder and pressed toward the holder by a control spring. Therefore, the gap between these parts is caused by a manufacturing error of the parts and is also an essential gap for operation. However, according to the configuration of the present invention, the gap becomes an unstable factor as in the prior art. The lens stop position can be controlled in a stable state by stabilizing the gap in one direction.

  According to a fourth aspect of the present invention, a feedback magnet is attached to the slide member corresponding to the one direction, and a hall sensor is fixed at a position facing the feedback magnet, A second feedback magnet is attached to the second slide member corresponding to the other direction, and a second hall sensor is fixed at a position facing the second feedback magnet. The positions of the slide member and the second slide member are controlled by controlling energization to the first and second coils based on the output signal. Therefore, similarly to the invention described in claim 2, it is possible to provide a camera shake prevention unit capable of controlling the position of the lens at an accurate position corresponding to the camera shake prevention signal.

It is a perspective view which shows the structure in one Embodiment of this invention. The perspective view which expanded the principal part in one embodiment of the present invention is shown. It is sectional drawing to which the principal part in one Embodiment of this invention was expanded. The perspective view which expanded the principal part in one embodiment of the present invention is shown. The perspective view which expanded the principal part in one embodiment of the present invention is shown. It is a perspective view which shows the structure in other embodiment of this invention. The perspective view which expanded the principal part in other embodiments of the present invention is shown. The perspective view which expanded the principal part in other embodiments of the present invention is shown. It is sectional drawing to which the principal part in other embodiment of this invention was expanded. The perspective view which expanded the principal part in other embodiments of the present invention is shown. The perspective view which expanded the principal part in other embodiments of the present invention is shown. The perspective view which expanded the principal part in other embodiments of the present invention is shown. It is explanatory drawing which shows the structure of a prior art example.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a camera shake prevention unit according to the invention will be described with reference to the drawings. First, an embodiment of an anti-shake unit according to the present invention will be described with reference to FIGS. The camera shake prevention unit illustrated below shows an embodiment when applied to a lens shutter.

  This camera shake prevention unit is configured such that an imaging light beam incident from the photographing lens 9 side is installed behind the holder 1 and forms an image on a light receiving sensor surface (not shown). A lens shutter (not shown) is disposed in the holder 1 immediately before the light receiving sensor. The slide member 7 to which the photographing lens 9 is attached is mounted and stored in the holder 1 in a movable state. Although not shown, the slide member 7 is operated to move the photographing lens 9 based on a camera shake signal output from a camera shake detection device using a known gyroscope or the like.

  The slide member 7 is pressed to the holder 1 side by the control spring 10 via balls 3e, 3f, 3g fitted into the concave portions 7a, 7b, 7c formed on the surface in the shape of a quadrangular pyramid shown in FIG. ing. The control spring 10 is fixedly attached to the holder 1 by three bent portions 10a in the peripheral portion, and is mutually connected by an elastic portion 10b, and is engaged with the balls 3e, 3f, 3g. The receiving surface 10c of the place is formed.

  Further, on the back surface of the slide member 7, there are V-shaped grooves 7d, 7e, 7f, 7g formed in the horizontal direction, which is one direction orthogonal to the optical axis of the photographing lens 9, as shown in FIG. The slide member 7 is coupled to the holder 1 via balls 3a, 3b, 3c and 3d which are fitted in the grooves 7d, 7e, 7f and 7g, respectively. In this case, the balls 3a, 3b, 3c, 3d are V-shaped formed on the surface of the holder 1 in the vertical direction, which is the other direction orthogonal to the optical axis of the photographing lens 9, as shown in FIG. The grooves 1a, 1b, 1c and 1d are respectively fitted.

  A first permanent magnet 6a and a second permanent magnet 6b are attached to the slide member 7 at an angle of 90 degrees. The first coil 5a and the second coil 5b are fixed in the holder 1 so as to face the permanent magnets 6a and 6b, respectively. Further, feedback magnets 8a and 8b are attached to the slide member 7 corresponding to the one direction and the other direction, and Hall sensors 4a and 4b for detecting the respective magnetisms at positions facing the feedback magnets 8a and 8b. 4 b is fixedly installed on the holder 1. In order to connect the hall sensors 4a and 4b and the coils 5a and 5b to a control circuit (not shown), respective terminals are wired to the circuit board 2 and taken out from the camera shake unit by the lead-out portion 2a.

  Next, the operation method of the camera shake prevention unit configured as described above will be described in detail below. Although not shown, control currents corresponding to the first coil 5a and the second coil 5b are energized based on a camera shake signal output from a camera shake detection device using a known gyroscope or the like. The first permanent magnet 6a is actuated by the magnetic force generated in the first coil 5a, whereby the slide member 7 is moved in the one direction along the grooves 7a, 7b, 7c and 7d formed in the one direction. Driven. Further, the second permanent magnet 6b is operated by the magnetic force generated in the second coil 5b, and the slide member 7 is driven in the other direction along the grooves 1a, 1b, 1c and 1d formed in the other direction. The In this way, the photographing member 9 is moved to a position corresponding to the camera shake signal output from the camera shake detection device by operating the slide member 7.

  When the feedback magnets 8a and 8b approach the hall sensors 4a and 4b as the slide member 7 is actuated, a predetermined actuation signal is output from the hall sensors 4a and 4b and is output from a known camera shake detection device. By contrast with the camera shake signal, the current supply to the first coil 5a and the second coil 5b is cut off, and the slide member 7 is stopped from moving. As a result, the photographing lens 9 can form an image at a position corresponding to the camera shake prevention signal.

  Next, it demonstrates in detail based on FIG. 6 thru | or FIG. 12 which shows 2nd embodiment. The same reference numerals are used for members having the same functions and effects as in the first embodiment. As shown in FIG. 6, the slide member 7 to which the photographic lens 9 is attached is mounted and stored in the holder 1 in a movable state.

  However, the difference from the case of the first embodiment is that the second slide member 11 is interposed between the slide member 7 and the holder 1. With this difference, the corresponding configuration is different. That is, part of the function of the slide member 7 in the first embodiment is shared by the second slide member 11. Accordingly, different parts of the configuration will be described below.

  On the back surface of the slide member 7, there are V-shaped grooves 7d, 7e, 7f formed in the horizontal direction, which is one direction orthogonal to the optical axis of the photographic lens 9, as shown in FIG. , 7e, 7f, and the slide member 7 is coupled to the second slide member 11 via balls 3h, 3i, 3j, respectively. In this case, the balls 3h, 3i, and 3j are fitted into the concave portions 11a, 11b, and 11c formed on the surface of the second slide member 11 as shown in FIG. Furthermore, V-shaped grooves 11d, 11e, and 11f formed in the vertical direction, which is the other direction orthogonal to the optical axis of the photographic lens 9, are formed on the back surface of the second slide member 11, as shown in FIG. Has been. The second slide member 11 is coupled to recesses 1e, 1f, and 1g formed in a square pyramid shape on the holder 1 through balls 3a, 3b, and 3c that fit into the grooves 11d, 11e, and 11f, respectively. ing.

  A second permanent magnet 6 b is attached to the slide member 7, and a second coil 5 b is fixed in the holder 1 so as to face this. Further, the first permanent magnet 6 a is attached to the second slide member 11 at an angle of 90 degrees with the second permanent magnet 6 b. A first coil 5a is fixed in the holder 1 so as to face the first permanent magnet 6a.

  Further, a feedback magnet 8a is attached to the slide member 7 corresponding to the one direction, and a feedback magnet 8b is attached to the second slide member 11 corresponding to the other direction. In addition, Hall sensors 4a and 4b for sensing the respective magnetism are fixedly installed in the holder 1 at positions facing these feedback magnets 8a and 8b.

  Next, the operation method of the second embodiment configured as described above will be described in detail below with respect to portions different from the first embodiment. Although not shown, control currents corresponding to the first coil 5a and the second coil 5b are energized based on a camera shake signal output from the camera shake detection device. The first permanent magnet 6a is actuated by the first coil 5a, whereby the second slide member 11 is formed in the V-shaped grooves 11d, 11e, 11f formed in the vertical direction which is the other direction. Along the other direction. Further, the second permanent magnet 6b is actuated by the second coil 5b, and the slide member 7 is driven in the one direction along the V-shaped grooves 7d, 7e, 7f formed in the one direction. . In this way, the slide member 7 and the second slide member 11 are operated to move the photographing lens 9 to a position corresponding to the camera shake signal output from the camera shake detection device.

  When the feedback magnets 8a and 8b approach the hall sensors 4a and 4b as the slide member 7 and the second slide member 11 are actuated, predetermined actuation signals are output from the hall sensors 4a and 4b. By contrast with the camera shake signal output from the camera shake detection device, the energization of the first coil 5a and the second coil 5b is cut off, and the slide member 7 and the second slide member 11 are stopped from moving. . As a result, the photographing lens 9 can form an image at a position corresponding to the camera shake prevention signal.

  As described above, according to the present invention, the gap between the parts to be secured when the slide member 7 to which the photographing lens 7 is attached and the second slide member 11 are moved is formed in a quadrangular pyramid shape in the above embodiment. This is absorbed by being pressed against the holder side by the control spring so as to close the contact between the recessed portion and the ball fitted to the recessed portion. Accordingly, the gap between the parts to be secured when the slide member 7 and the second slide member 11 move is stably kept in a predetermined direction, and the stop position of the photographing lens 7 is controlled in a constantly stable state. become able to.

  The embodiment related to the realization of the technical idea of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and the embodiment is appropriately modified within the scope of the technical idea of the present invention. can do.

  For example, the “recess formed in the shape of a quadrangular pyramid” in the above embodiment can be, for example, a “recess formed in the shape of a polygonal pyramid or a cone”. In addition, the one direction and the other direction orthogonal to the optical axis have been described as the X-axis and Y-axis directions. However, the direction is not necessarily limited to this direction, and the direction most suitable for the camera shake detection signal as long as the direction is orthogonal to the optical axis. Can be set appropriately.

1 …… Holder 2 …… Circuit board 2a …… Drawer 3 …… Balls 4a, 4b …… Hall sensor 5a …… First coil 5b …… Second coil 6a …… First permanent magnet 6b …… Second permanent magnet 7 ... slide members 8a, 8b ... feedback magnet 9 ... lens 10 ... control spring 11 ... second slide member 12 ... yoke

Claims (4)

In a camera shake prevention unit in which a photographing lens is mounted so as to be movable in the optical axis direction, and a movable slide member is housed in a holder, and the photographing lens is moved by operating the slide member based on a camera shake detection signal.
The slide member is coupled to the holder via a groove formed in one direction orthogonal to the optical axis of the photographic lens and a ball fitted to the groove, and a control spring is provided to press the ball toward the holder side. And
The slide member is coupled to the holder via a groove formed in another direction orthogonal to the optical axis of the photographic lens and a ball fitted to the groove,
The slide member is driven in the one direction along a groove formed in the one direction by a first permanent magnet and a first coil, and further in the other direction by a second permanent magnet and a second coil. The camera shake prevention unit is configured to be driven in the other direction along the groove formed in the control unit and the control spring is fixed to the holder. In a camera shake prevention unit in which a photographing lens is mounted so as to be movable in the optical axis direction, and a movable slide member is housed in a holder, and the photographing lens is moved by operating the slide member based on a camera shake detection signal.
The slide member is coupled to the holder via a groove formed in one direction orthogonal to the optical axis of the photographic lens and a ball fitted to the groove, and a control spring is provided to press the ball toward the holder side. And
The slide member is coupled to the holder via a groove formed in another direction orthogonal to the optical axis of the photographic lens and a ball fitted to the groove,
The slide member is driven in the one direction along a groove formed in the one direction by a first permanent magnet and a first coil, and further in the other direction by a second permanent magnet and a second coil. Driven in the other direction along the groove formed in
A feedback magnet is attached to the slide member in correspondence with the one direction and the other direction, and a hall sensor is fixed at a position facing the feedback magnet. Based on an output signal of the hall sensor, the first sensor Controlling the energization of the first and second coils to control the position of the slide member;
The camera shake prevention unit is characterized in that the control spring is attached to the holder. In a camera shake prevention unit in which a photographing lens is mounted so as to be movable in the optical axis direction, and a movable slide member is housed in a holder, and the photographing lens is moved by operating the slide member based on a camera shake detection signal.
A control spring that presses the slide member toward the holder through a ball fitted to a recess formed in the slide member;
The slide member is coupled to the second slide member via a groove formed in one direction orthogonal to the optical axis of the photographing lens and a ball fitted to the groove.
The second slide member is coupled to the holder via a groove formed in another direction orthogonal to the optical axis of the photographic lens and a ball fitted to the groove,
The slide member is driven in the one direction along a groove formed in the one direction by a first coil to which a first permanent magnet is attached,
The second slide member is attached with a second permanent magnet and is driven in the other direction along a groove formed in the other direction by a second coil so that the control spring is fixed to the holder. An anti-shake unit that is constructed. In a camera shake prevention unit in which a photographing lens is mounted so as to be movable in the optical axis direction, and a movable slide member is housed in a holder, and the photographing lens is moved by operating the slide member based on a camera shake detection signal.
A control spring that presses the slide member toward the holder through a ball fitted to a recess formed in the slide member;
The slide member is coupled to the second slide member via a groove formed in one direction orthogonal to the optical axis of the photographing lens and a ball fitted to the groove.
The second slide member is coupled to the holder via a groove formed in another direction orthogonal to the optical axis of the photographic lens and a ball fitted to the groove,
The slide member is driven in the one direction along a groove formed in the one direction by a first coil to which a first permanent magnet is attached,
The second slide member is driven in the other direction along a groove formed in the other direction by a second coil to which a second permanent magnet is attached,
A feedback magnet is attached to the slide member corresponding to the one direction, and a hall sensor is fixed at a position facing the feedback magnet.
A second feedback magnet is attached to the second slide corresponding to the other direction, and a second Hall sensor is fixed at a position facing the second feedback magnet,
Based on the output signals of these two Hall sensors, controlling the energization to the first and second coils respectively to control the position of the slide member and the second slide member,
The camera shake prevention unit is characterized in that the control spring is fixed to the holder.

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