JP2013003404A - Blurry image prevention mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blurry image prevention mechanism that stably moves an imaging device by a simple structure.SOLUTION: A blurry image prevention mechanism comprises: an imaging device 305; a base member 11 for mounting devices; a first movement member 12 that moves in a first direction; a second movement member 13 on which the imaging device is mounted, and that moves in a second direction; three first rolling members 112A to 112C that, positioned between the base member and the first movement member, moves in the first direction, where virtual lines connecting the first rolling members one another form a first triangle parallel to a light receiving surface; second rolling members 211A to 211C that, positioned between the first and second movement members, moves in the second direction, where virtual lines connecting the second rolling members one another form a second triangle parallel to the first triangle, two of the three second rolling members being positioned near one side of the first triangle and spaced apart each other; a press member 320 that presses the first and second movement members in a direction toward the base member and presses two of the second rolling members in a direction perpendicular to the light receiving surface; a third rolling member 318 positioned between the press member and the second movement member, and positioned near the second rolling members; and two pieces of energizing means 323 and 324 for energizing the press member to cause pressing force.

Description

  The present invention relates to a blurred image prevention mechanism, and more particularly to a blurred image prevention mechanism that is applied to an imaging device and prevents a blurred image by moving an imaging element in a direction parallel to a light receiving surface.

  Conventionally, an optical image formed by an optical lens or the like is sequentially converted into an image signal using an image pickup device such as a photoelectric conversion device, and the image signal obtained thereby is recorded on a recording medium as image data in a predetermined form. In addition, an imaging device such as a digital camera or a video camera (hereinafter referred to as a digital camera or a video camera) configured to include an image display device such as a liquid crystal display device (LCD) that reproduces and displays image data recorded on the recording medium as an image. In general, a camera) has been put into practical use and widely used.

  In this type of camera, image blur may occur due to camera shake or the like caused by the holding state of the camera during use. If a photographing operation is performed in such a case, the acquired image becomes a blurred image. Therefore, in the conventional camera, various proposals for a mechanism for preventing such a blurred image have been made and put into practical use.

  For example, a blur image prevention mechanism that prevents a blur image by moving a component unit that supports the image sensor in a direction parallel to the light receiving surface of the image sensor with a predetermined movement amount according to camera shake is practical. It has become.

  In this type of blurred image prevention mechanism, when the image sensor is moved in a direction parallel to the light receiving surface, it is necessary to move in a stable state while ensuring flatness in the movement direction.

  Therefore, in this type of conventional anti-shake mechanism, for example, a mechanism for ensuring the flatness of the light receiving surface of the moving image sensor and allowing the image sensor to move in a stable state is disclosed in, for example, Japanese Patent Application Laid-Open No. 2010-276973. Various proposals have been proposed by the gazettes.

In the means disclosed in the above Japanese Patent Application Laid-Open No. 2010-276973, etc., in order to stabilize the light receiving surface of the moving image sensor, the biasing is performed in the direction along the optical axis (Z-axis direction). A force member is provided.

JP 2010-276973 A

  Applying this type of blur image prevention mechanism or the like to a photographing device such as a camera inevitably leads to an increase in the size of the device itself. However, in recent years, it has become an indispensable constituent requirement to mount this type of blur image prevention mechanism or the like on a photographing device such as a camera. On the other hand, there is always a demand for reduction in size and weight in photographing devices such as cameras.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a blur image prevention mechanism that can realize stabilization of movement of an image sensor with a simpler configuration. It is.

  In order to achieve the above object, the blur image preventing mechanism of one embodiment of the present invention is the blur image preventing mechanism of an imaging device, which includes an imaging element and a projection plane parallel to the light receiving surface of the imaging element. A first base member mounted on the base member, a first moving member placed so as to be movable in a first direction parallel to the base member, and the first member mounted on the imaging element and parallel to the base member. A second moving member that is movably mounted in a second direction perpendicular to the first direction, and the first movement that is sandwiched between the base member and the first moving member. Three first rolling members arranged such that a virtual line connecting the members spaced apart from each other and moving in the first direction forms a first triangle parallel to the light receiving surface And the second moving part disposed between the first moving member and the second moving member. The three rolling members are arranged such that a virtual line that allows movement in the second direction and is spaced apart from each other to form a second triangle parallel to the first triangle. And the second of the three rolling members disposed in the vicinity of the one side so that two of the three rolling members are along one side of the first triangle of the first rolling member. A plate-shaped member for pressing and holding the rolling member, the first moving member, and the second moving member in the direction of the base member, and the above-mentioned of the second rolling members A pressing member that presses the two rolling members indirectly through the second moving member in a direction perpendicular to the light receiving surface, and is interposed between the pressing member and the second moving member. The two rolling members, wherein the second moving members are movable in the first direction and the second direction. A third rolling members disposed in the vicinity, and characterized by including a biasing means for providing a pressing force to the pressing member.

  ADVANTAGE OF THE INVENTION According to this invention, the blurring image prevention mechanism which can implement | achieve stabilization of the movement of an image pick-up element with a simpler structure can be provided.

1 is an exploded perspective view showing the overall configuration of a blurred image prevention mechanism according to an embodiment of the present invention; The front view of the blurring image prevention mechanism of FIG. FIG. 2 is an exploded perspective view showing a configuration of a non-driving unit in the blurred image prevention mechanism of FIG. FIG. 3 is an exploded perspective view showing a configuration of the Y-direction drive unit in the blurred image prevention mechanism of FIG. FIG. 2 is an exploded perspective view showing a configuration of a Y-direction drive unit in the blur image prevention mechanism of FIG. FIG. 2 is an exploded perspective view showing a configuration of an X-direction drive unit in the blur image prevention mechanism of FIG. FIG. 2 is an exploded perspective view showing a configuration of an X-direction drive unit in the blurred image prevention mechanism of FIG. Sectional drawing which follows the [8]-[8] line of FIG. Sectional drawing which follows the [9]-[9] line of FIG. Sectional drawing which follows the [10]-[10] line of FIG. Sectional drawing which follows the [11]-[11] line | wire of FIG. Sectional drawing which follows the [12]-[12] line of FIG. Sectional drawing which follows the [13]-[13] line of FIG. Sectional drawing which follows the [14]-[14] line of FIG. Sectional drawing which follows the [15]-[15] line of FIG. FIG. 2 is a front view showing a state where an X-direction drive unit is removed from the blurred image prevention mechanism of FIG. 1, and a view showing an arrangement of Y-direction drive balls; FIG. 2 is a front view of the blur image preventing mechanism of FIG. 1, showing the arrangement of balls for X direction driving; FIG. 2 is a front view of the blur image preventing mechanism of FIG. 1, and is a view (composite view of FIGS. 16 and 17) showing the arrangement of Y direction driving balls and X direction driving balls together;

  The present invention will be described below with reference to the illustrated embodiments.

  In one embodiment of the present invention, for example, an optical image formed by an optical lens is photoelectrically converted using a solid-state imaging device, and an image signal obtained thereby is converted into digital image data representing a still image or a moving image, thus Applicable to imaging devices (cameras) configured to record the generated digital data on a recording medium and to reproduce and display still images or moving images on a display device based on the digital image data recorded on the recording medium 2 is an example of a blurred image prevention mechanism.

  In each drawing used for the following description, each component may be shown with a different scale in order to make each component large enough to be recognized on the drawing. Therefore, according to the present invention, the number of constituent elements, the shape of the constituent elements, the ratio of the constituent element sizes, and the relative positional relationship of the constituent elements described in these drawings are limited to the illustrated embodiments. It is not a thing.

A configuration of a blurred image prevention mechanism according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the blur image prevention mechanism 1 of the present embodiment is mainly configured by a non-drive unit 11, a Y direction drive unit 12, and an X direction drive unit 13.

  The non-driving unit 11 has a projection surface parallel to a light receiving surface of an image sensor 305 (see FIG. 6), which will be described later, and is fixed inside a camera that is an imaging device to which the blur image prevention mechanism 1 of the present embodiment is applied. It is the base member arrange | positioned.

  As shown in FIGS. 1 and 3, the non-drive unit 11 includes a fixed frame 101 made of a thin sheet metal member made of, for example, stainless steel, and a Y-direction motor unit 102 fixedly disposed at a predetermined portion of the fixed frame 101. Consists mainly of etc.

The Y-direction motor unit 102 is a drive source for moving the Y-direction drive unit 12 (detailed configuration will be described later) in a plane along the arrow Y in FIG.
The Y-direction motor unit 102 includes a Y-direction drive motor 103, a Y pinion gear 104, a Y motor base 105, a Y gear lid 106, a Y flat gear 107, a Y screw 108, a Y nut 109, and the like. It is configured.

  The Y motor base 105 is formed of, for example, a resin mold member or the like, and is fixed to the fixed frame 101 with a plurality of screws 110. In this case, a plurality of positioning holes 101a are formed on the fixed frame 101 side, and a plurality of bosses 105b are projected from the Y motor base 105 side correspondingly. When the Y motor base 105 is fixedly disposed on the fixed frame 101, the plurality of bosses 105b are fitted into the corresponding plurality of positioning holes 101a, and then fastened using the plurality of screws 110, whereby the Y motor The base 105 is securely fixed to the fixed frame 101.

  A Y gear lid 106 is fixed to one surface of the Y motor base 105 with screws 111. At this time, the screws 111 simultaneously fix the Y-direction drive motor 103 to the Y motor base 105 with screws. A Y pinion gear 104 is fixed to the drive shaft of the Y direction drive motor 103. The Y pinion gear 104 is rotatably disposed in the hole 105 c of the Y motor base 105. In the vicinity of the hole 105c, a hole 105d that communicates with the Y flat gear 107 is formed. The Y spur gear 107 is rotatably disposed in the hole 105d. At this time, the Y spur gear 107 meshes with the Y pinion gear 104. The Y spur gear 107 pivotally supports the Y screw 108 so as to be rotatable. One end of the Y screw 108 is pivotally supported by the hole 106 a of the Y gear lid 106 via one end of the Y motor base 105. The other end of the Y screw 108 is pivotally supported by a fixed portion 105e (see FIG. 14) of the Y motor base 105. A Y nut 109 is screwed into the Y screw 108 (see FIGS. 8 and 14). 8 and 14 show a cross section of the Y-direction motor unit 102 in the vicinity of the Y nut 109.

  The Y nut 109 is formed with a protrusion 109a that protrudes in the circumferential direction. The protrusion 109a is disposed in the groove 105a of the Y motor base 105 when the Y-direction motor unit 102 is assembled (see FIGS. 3, 8, and 14). Thereby, the Y nut 109 is configured to be able to move in the long axis direction of the Y screw 108 while being restricted in rotation. The Y nut 109 constitutes a part of the Y direction drive unit 12 (details will be described later), and a nut locking portion 214a (details) of the Y spring hook member 214 that moves integrally with the Y frame 201 in the arrow Y direction. (Described later).

The Y-direction motor unit 102 configured as described above operates as follows.
First, when the Y-direction drive motor 103 is driven and the Y pinion gear 104 rotates, the Y spur gear 107 meshed therewith also rotates. In conjunction with this, the Y screw 108 rotates. When the Y screw 108 is rotated, the rotation of the Y nut 109 engaged with the Y screw 108 is restricted, so that the Y nut 109 moves in the arrow Y direction shown in FIGS. Since the Y nut 109 is locked to the nut locking portion 214a, it is pressed in the same direction. Thereby, the Y nut 109 can move the Y direction drive unit 12 in the Y direction of the arrow.

Next, the configuration of the Y direction drive unit 12 will be described. The Y-direction drive unit 12 is a first moving member that is movably mounted in a first direction (arrow Y direction in FIG. 1) parallel to the non-driving unit 11 that is the base member.
As shown in FIGS. 1, 4 and 5, the Y-direction drive unit 12 is fixed to a Y frame 201 made of a thin plate-like metal member formed by, for example, aluminum cutting, and a predetermined portion of the Y frame 201. It is mainly configured by the X-direction motor unit 202 and the Y spring hook member 214 that are disposed.

The X-direction motor unit 202 is a drive source for moving the X-direction drive unit 13 (detailed configuration will be described later) within a plane along the arrow X in FIG. The X direction motor unit 202 is configured in substantially the same manner as the Y direction motor unit 102 described above.
That is, the X direction motor unit 202 includes an X direction drive motor 203, an X pinion gear 204, an X motor base 205, an X gear lid 206, an X flat gear 207, an X screw 208, an X nut 209, and the like. It is constituted by.

  The X motor base 205 is formed of, for example, a resin mold member or the like, and is fixed to the Y frame 201 with a plurality of screws 210. In this case, a plurality of positioning holes 201a (see FIG. 5) are formed on the Y frame 201 side, and a plurality of bosses 205b are projected on the X motor base 205 side correspondingly. Yes. When the X motor base 205 is fixedly disposed on the Y frame 201, the X bosses 205b are fitted into the corresponding positioning holes 201a and fastened by using a plurality of screws 210. The base 205 is securely fixed to the Y frame 201.

  An X gear lid 206 is fixed to one surface of the X motor base 205 with screws 211. At this time, the screw 211 simultaneously fixes the X drive motor 203 to the X motor base 205 with screws. An X pinion gear 204 is fixed to the drive shaft of the X drive motor 203. The X pinion gear 204 is rotatably disposed in a hole 205c (see FIG. 5) of the X motor base 205. In the vicinity of the hole 205c, a hole 205d in which the X spur gear 207 communicates internally is formed. The X spur gear 207 is rotatably disposed in the hole 205d. At this time, the X spur gear 207 meshes with the X pinion gear 204. The X flat gear 207 pivotally supports the X screw 208 so as to be rotatable. One end of the X screw 208 is pivotally supported in a hole 206a of the X gear lid 206 via one end of the X motor base 205. The other end of the X screw 208 is pivotally supported by a fixed portion 205e (see FIG. 13) of the X motor base 205. An X nut 209 is screwed into the X screw 208 (see FIGS. 10 and 13). 10 and 13 show a cross section in the vicinity of the X nut 209 in the X direction motor unit 202.

  The X nut 209 is formed with a protruding portion 209a that protrudes in the circumferential direction. When the X-direction motor unit 202 is assembled, the protrusion 209a is disposed in the groove 205a of the X motor base 205 (see FIGS. 10 and 13). Accordingly, the X nut 209 is configured to be movable in the long axis direction of the X screw 208 in a state where the rotation is restricted. The X nut 209 is locked to a nut locking portion 303a (details will be described later) of a dustproof holder 303 that constitutes a part of the X-direction drive unit 13 (details will be described later).

The X-direction motor unit 202 configured as described above operates as follows.
First, when the X-direction drive motor 203 is driven and the X pinion gear 204 rotates, the X flat gear 207 that meshes therewith also rotates. In conjunction with this, the X screw 208 rotates. When the X screw 208 rotates, the X nut 209 screwed into the X screw 208 is restricted in rotation, so that the X nut 209 moves in the arrow X direction shown in FIGS. Since the X nut 209 is locked to the nut locking portion 303a, it is pressed in the same direction. Thereby, the X nut 209 can move the X direction drive unit 13 in the X direction of the arrow.

  By the way, between the non-driving unit 11 (base member) and the Y-direction driving unit 12 (first moving member), the arrow Y in FIG. 1 of the Y-direction driving unit 12 (first moving member). It is possible to move in the direction (first direction), arranged so as to be spaced apart from each other, and arranged so that a virtual line connecting each other forms a first triangle parallel to a light receiving surface of an image sensor 305 described later. In addition, three steel balls 112A, 112B, and 112C, which are three first rolling members, are sandwiched and arranged.

  The three first rolling members (three steel balls 112A, 112B, 112C) in the blur image preventing mechanism 1 of the present embodiment are viewed from the front of the blur image preventing mechanism 1 as shown in FIG. A portion near the upper left corner (position indicated by reference symbol A1), a portion near the upper right corner (position indicated by reference symbol B2) viewed from the front of the blur image prevention mechanism 1, and the blur image prevention mechanism 1 When viewed from the front, it is disposed at a position (position indicated by reference numeral C1) near the lower left corner. In this case, when a virtual line is drawn by connecting the points of the three steel balls 112A, 112B, and 112C, a first triangle (ΔA1B1C1) is formed as shown in FIG. The first triangle (ΔA1B1C1) is a surface parallel to the light receiving surface of the image sensor 305.

  At a position indicated by reference numeral A1 in FIG. 16, a substantially elliptical groove 101b having a long side extending along the arrow Y direction in FIG. 1 is formed on the fixed frame 101 side. On the other hand, when the Y-direction drive unit 12 is arranged at a predetermined position and assembled to the non-drive unit 11, the substantially elliptical groove 101b of the fixed frame 101 is inserted into the X frame via the hole 201b of the Y frame 201. The protrusions 205f of the motor base 205 are arranged to face each other. The protrusion 205f has a cavity of substantially the same shape and size as the substantially elliptical groove 101b.

  Then, as shown in FIG. 10, one of the three steel balls 112A, 112B, 112C is formed in a space formed between the internal space of the protrusion 205f and the substantially elliptical groove 101b. A steel ball 112A is stored. In addition, a metal ball receiving plate member 113 having a substantially elliptical shape is disposed between the steel ball 112A and the bottom surface of the protrusion 205f. FIG. 10 shows a cross section of the portion where the steel ball 112A is disposed.

  In this state, the steel ball 112A can roll in the space between the internal space of the protrusion 205f and the elliptical groove 101b. Both the substantially elliptical inner space of the protrusion 205f and the substantially elliptical groove 101b have a shape having long sides extending in the direction of the arrow Y in FIG. It is disposed between the non-drive unit 11 and the Y-direction drive unit 12 so as to be able to roll in the arrow Y direction in FIG.

  In addition, a substantially rectangular hole 101c is formed on the fixed frame 101 side at the position indicated by reference numeral B1 in FIG. Positioning bosses 101d are projected in the vicinity of the left and right sides of the front side of the hole 101c. FIG. 9 shows a cross section of a portion where the steel ball 112B is disposed.

  A V-groove fitting 114 having a V-groove 114a extending in the direction of arrow Y in FIG. 1 is disposed in the hole 101c with the V-groove 114a fitted. The V-groove fitting 114 has holes 114b on both the left and right sides, and the positioning boss 101d is fitted into the holes 114b. Thereby, the V-groove metal fitting 114 is fixed to the fixed frame 101.

  On the other hand, when the Y-direction drive unit 12 is arranged at a predetermined position on the non-drive unit 11 and assembled, the V-groove metal fitting 114 disposed in the hole 101c of the fixed frame 101 has the Y-frame 201 of the Y-frame 201. Substantially rectangular holes 201g are arranged to face each other. The hole 201g is formed in substantially the same shape and size as the hole 101c of the fixed frame 101. Positioning bosses 201h are projected in the vicinity of the left and right sides of the hole 201g (see FIG. 9). A V-groove fitting 114 having a V-groove 114a extending in the direction of arrow Y in FIG. 1 is disposed in the hole 201g with the V-groove 114a fitted. The V-groove fitting 114 has holes 114b on both the left and right sides, and the positioning boss 201h is fitted into the holes 114b. Thereby, the V-groove fitting 114 is fixed to the Y frame 201.

  In this state, the steel ball 112B is disposed between the two V-groove fittings 114 so as to be able to roll. Since the V-grooves 114a of the two V-groove fittings 114 are both formed so as to extend in the direction of the arrow Y in FIG. 1, the steel ball 112B can roll in the direction of the arrow Y in FIG. The drive unit 11 and the Y-direction drive unit 12 are sandwiched and arranged.

  Further, at the position indicated by reference numeral C1 in FIG. 16, the steel ball 112C has the same configuration as the above-described steel ball 112B (detailed description is omitted with the same reference numerals; see FIGS. 3 to 5 and FIG. 8). Thus, the non-driving unit 11 and the Y-direction driving unit 12 are arranged so as to be able to roll in the direction of arrow Y in FIG.

  On the other hand, a hole 201c is formed in a portion near the center of the Y frame 201. Further, when the non-drive unit 11 and the Y-direction drive unit 12 are assembled, a screw hole 101e is formed on the fixed frame 101 side facing the hole 201c. A screw 213 is screwed into the screw hole 101e through a spacer 212 through the hole 201c. In this case, the width dimension of the hole 201c is set to be smaller than the head diameter of the screw 213. Moreover, the hole 201c is formed in a rectangular shape having a long side extending along the arrow Y direction in FIG. The spacer 212 is provided to ensure a gap with a predetermined dimension between the Y frame 201 and the fixed frame 101. Therefore, when the screw 213 is fastened to the screw hole 101e of the fixed frame 101 via the Y frame 201, the Y frame 201 can move only in the arrow Y direction in FIG. The amount of movement of the Y frame 201 at this time is defined by the dimension in the long side direction of the hole 201c.

  In the Y frame 201, the head diameter of the screw 213 is larger than the width dimension of the hole 201c, so that the head of the screw 213 does not come out of the hole 201c. Therefore, the Y frame 201 and the fixed frame 101 are maintained in a mutually parallel state.

  A Y spring hook member 214 is disposed at a predetermined portion of the Y frame 201 (in the present embodiment, a portion near the lower end of the Y frame 201). The Y spring hook member 214 is provided with an urging mechanism (described later) for ensuring the flatness of the Y-direction drive unit 12 (Y frame 201) with respect to the non-drive unit 11 (fixed frame 101). It is provided to arrange guide means (described later) for guiding the movement in the arrow Y direction in FIG.

  The Y spring hook member 214 is formed of, for example, a resin mold member or the like, and is fixed to the Y frame 201 with screws by a plurality of screws 210. At this time, a metal ball receiving plate member 215 is sandwiched between the Y frame 201 and the Y spring hook member 214. FIG. 12 shows a cross section near the Y spring hook member 214.

  The Y spring hook member 214 has three through holes 214b having long sides extending along the direction of the arrow Y in FIG. In each through hole 214b, one steel ball 217 is housed so as to roll freely. A ball receiving plate member 216 is disposed so as to close the opening of the through hole 214b. At this time, as shown in FIGS. 8 and 12, each steel ball 217 accommodated in each through hole 214b is sandwiched between the ball receiving plate member 215 and the ball receiving plate member 216. .

  The ball receiving plate member 216 is fixed by pins 115 and 116 implanted in the fixed frame 101. The pin 115 has a flange portion at the head. The ball receiving plate member 216 is attached so that it does not fall off by engaging one fork portion 216a of the ball receiving plate member 216 with the head flange portion of the pin 115. The pin 116 is formed with a screw hole at the axial center. A screw 219 is screwed to the pin 116 via a spring 218 in a state where the other fork portion 216a of the ball receiving plate member 216 is disposed. At this time, the diameter of the spring 218 is larger than the gap size of the other fork portion 216a of the ball receiving plate member 216. Therefore, the spring 218 is disposed between the head of the screw 219 and the other fork 216a of the ball receiving plate member 216, and the spring 218 is compressed by tightening the screw 219. Thereby, the ball receiving plate member 216 is pressed in the direction of arrow Z in FIG. 1 toward the front side of the Y spring hooking member 214 in accordance with the tightening degree of the screw 219. At this time, since the three steel balls 217 are sandwiched between the ball receiving plate member 215 and the ball receiving plate member 216 as described above, the screw 219 can be tightened. When the ball receiving plate member 216 is pressed in the direction of the arrow Z in FIG. 1 at the other fork portion 216a provided at the peripheral portion thereof, not only this one point is pressed but also the ball receiving plate member 216. 1 is pressed in the direction indicated by the arrow Z in FIG. 1 while maintaining a plane parallel to the fixed frame 101. As a result, the Y frame 201 is pressed against the fixed frame 101.

  Further, an urging member 117 made of an elastic coil spring or the like is stretched between the Y spring hook member 214 (integrated with the Y frame 201) and the Y direction motor unit 102 (integrated with the fixed frame 101). ing. Specifically, one end of the urging member 117 is hung on the Y spring hook portion 214 c of the Y spring hook member 214. The other end of the urging member 117 is hung on the Y spring hook 105 f of the Y motor base 105 of the Y direction motor unit 102. As described above, the Y frame 201 is movable in the arrow Y direction in FIG. Therefore, by providing the urging member 117 between the fixed frame 101 and the Y frame 201, the Y frame 201 is always urged in one direction (downward) with respect to the fixed frame 101.

  Next, the configuration of the X direction drive unit 13 will be described. The X-direction drive unit 13 includes an image sensor 305 to be described later, and a second direction (see FIG. 1) perpendicular to the arrow Y direction (first direction) in FIG. 1 parallel to the non-drive unit 11 (base member). 2 is a second moving member placed so as to be movable in the direction of arrow X in FIG.

  As shown in FIGS. 6, 7, and 15, the X-direction drive unit 13 is mainly configured by an imaging board 304, an imaging unit 311, a dustproof unit 312, and the like.

  The image pickup substrate 304 is driven by electric components for performing various signal processing such as drive control of the image pickup element 305 and various image signal processing by receiving an output signal from the image pickup element 305 obtained by the drive control. It is the electric board | substrate which mounted the electric circuit formed.

  The image pickup unit 311 includes an image pickup element 305, an image pickup element support plate 302 that fixes and holds the image pickup element 305, and various components disposed on the front side of the image pickup element 305, such as a protective glass 306, a seal member 307, The filter includes an optical filter 308 such as a low-pass filter (LPF) or an infrared cut filter, a mask member 309, a cover member 310, and the like.

  The imaging element support plate 302 is made of a thin plate metal member formed by, for example, aluminum cutting. An image sensor 305 is disposed on the front side of the image sensor support plate 302. In addition, about the structure of imaging unit 311 itself, the thing of the general structure applied to the conventional camera etc. is applied, and detailed description is abbreviate | omitted.

  The dustproof unit 312 is mainly configured by an X frame 303 that forms the main part of the X-direction drive unit 13, a sealing member 313, a dustproof transparent plate 314, a vibration isolation member 315, and the like. Regarding the configuration of the dustproof unit 312 itself, a general configuration applied to a conventional camera or the like is applied, and detailed description thereof is omitted.

  The X-direction drive unit 13 is arranged in order of the imaging substrate 304, the imaging unit 311, and the dustproof unit 312 from the back side. In other words, the imaging substrate 304 is disposed on the back side and the dustproof unit 312 is disposed on the front side of the imaging unit 311 so as to sandwich the imaging unit 311.

  The imaging board 304 is fixed to the protrusions extending from the X frame 303 of the dust-proof unit 312 toward the back side by fastening a plurality of screws 315. In addition, between the imaging unit 311 and the dust-proof unit 312, the imaging device support plate 302 is fixed to the X frame 303 of the dust-proof unit 312 with screws by a plurality of screws 315 from the back side.

  In the dust-proof unit 312, the dust-proof transparent plate 314 provided on the front side of the X frame 303 is screwed and fixed by a plurality of screws 317 via a plurality of pressing plates 316 in the vicinity of the substantially four corners of the rectangular shape. ing.

  As described above, the X-direction drive unit 13 includes the imaging substrate 304, the imaging unit 311, and the dust-proof unit 312. The X-direction drive unit 13 is arranged in the direction indicated by the arrow X in FIG. It is configured to only move.

  The X frame 303 of the X direction drive unit 13 is formed of, for example, a resin mold member. An X spring hooking portion 303b is integrally formed in a predetermined portion of the X frame 303, that is, in the vicinity of the upper edge, as shown in FIGS.

The X spring hooking portion 303b is provided with an urging mechanism (described later) for ensuring flatness of the X direction drive unit 13 (X frame 303) with respect to the Y direction drive unit 12 (Y frame 201). It is provided to dispose guide means (described later) for guiding the movement in the arrow X direction in FIG.

  The X spring hook portion 303b is provided with three bottomed holes 303c having a substantially square shape. Each bottomed hole portion 303c accommodates one ball receiving plate member 319 and one steel ball 318 (third rolling member). At this time, the steel ball 318 can freely roll. FIG. 13 mainly shows a cross section in the vicinity of the X spring hooking portion 303b.

  And as shown in FIG. 1, the flat pressing member 320 made from metal is arrange | positioned so that the opening of the said bottomed hole part 303c may be plugged up. Therefore, as shown in FIG. 13, each steel ball 318 housed in each bottomed hole 303 c is sandwiched between the ball receiving plate member 319 and the pressing member 320.

  In other words, the three steel balls 318 as the third rolling members are arranged so as to be sandwiched between the pressing member 320 and the X frame 303 of the X-direction drive unit 13 (second moving member). It is a member. This 3rd rolling member (318) is arrange | positioned in the vicinity of two rolling members of the 2nd rolling members mentioned later.

  Further, as described above, the three steel balls 318 (third rolling members) are accommodated in three substantially square bottomed holes 303c formed in the X frame 303 on the second moving member side. Has been. Thereby, it can roll in the arrow X direction (first direction) in FIG. 1 and the arrow Y direction (second direction) in FIG. Accordingly, the three steel balls 318 (third rolling members) move in the direction indicated by the arrow X (first direction) in FIG. 1 on the plane parallel to the light receiving surface of the image sensor 305, and FIG. It rolls according to the combined movement amount with the movement amount in the arrow Y direction (second direction).

  The pressing member 320 has a plate shape for pressing and holding the Y-direction drive unit 12 (first moving member) and the X-direction driving unit 13 (second moving member) in the direction of the fixed frame 101 (base member). It is a member.

  The pressing member 320 is fixed by pins 118 and 119 implanted in the fixed frame 101. When the anti-blurring mechanism 1 is assembled, the pins 118 and 119 each pass through the two holes 201d of the Y frame 201, pass through the two holes 303d of the X frame 303, and The two holes 320a of the pressing member 320 pass through the front surface of the X frame 303 (see FIG. 1). The pins 118 and 119 are formed with screw holes, and the screws 321 and 322 are fastened to the screw holes. At this time, a screw 321 is screwed into the pin 118 with a coil spring 323 interposed therebetween. A screw 322 is screwed onto the pin 119 with a coil spring 324 and a spacer 325 interposed therebetween. The diameters of the coil springs 323 and 324 are larger than the two holes 320 a of the pressing member 320. Therefore, by tightening the screws 321 and 322, the coil springs 323 and 324 are respectively compressed. Thereby, the pressing member 320 is pressed in the direction of arrow Z in FIG. 1 toward the front side of the X spring hooking portion 303b of the X frame 303 according to the tightening degree of the screws 321 and 322. That is, the coil springs 323 and 324 are constituent members that function as urging means for applying a pressing force to the pressing member 320.

  As described above, the three steel balls 318 are sandwiched between the pressing member 320 and the ball receiving plate member 319 so as to be able to roll. Therefore, when the screws 321 and 322 are tightened, the pressing member 320 is pressed in the direction of arrow Z in FIG. 1 via the coil springs 323 and 324. As a result, the X-direction drive unit 13 (second moving member) and the Y-direction drive unit 12 (first moving member) are pressed and held in the direction of the fixed frame 101 (base member). .

  Further, the pressing member 320 is configured to be supported by the three steel balls 318. The arrangement of the three steel balls 318 is such that the pressing force of the coil springs 323 and 324 (biasing means) is a virtual third triangle formed by a side connecting the three steel balls 318. D: set to work inside (see FIG. 17). Thereby, the three steel balls 318 (third rolling members) act to arrange the pressing member 320 in parallel with the light receiving surface of the image sensor 305.

  Further, an urging member 326 is stretched between an X spring hooking portion 303 b of the X frame 303 and a pin 119 (integrated with the fixed frame 101) by a cohesive coil spring or the like. Specifically, one end of the urging member 326 is hooked on the X spring hook portion 303e of the X spring hook portion 303b. The other end of the biasing member 326 is hung on the head of the pin 119.

  Although details will be described later, the X-direction drive unit 13 including the X frame 303 with respect to the Y frame 201 is movable only in the arrow X direction in FIG. For the fixed frame 101, the X-direction drive unit 13 is movable in the arrow Y direction and the arrow X direction in FIG.

  Therefore, by providing the urging member 326 between the fixed frame 101 and the X frame 303, the X frame 303 is always placed in one direction with respect to the fixed frame 101 (rightward when viewed from the front of the blurred image prevention mechanism 1). ).

  By the way, between the Y direction drive unit 12 (first moving member) and the X direction driving unit 13 (second moving member), the X direction driving unit 13 (second moving member) is shown in FIG. In the direction of the arrow X (second direction), arranged so as to be spaced apart from each other, and arranged so that a virtual line connecting each other forms a second triangle parallel to the first triangle Three rolling members, two of the three rolling members being along one side of the first triangle formed by the first rolling members (steel balls 112A, 112B, 112C). The steel balls 211A, 211B, and 211C, which are second rolling members that are spaced apart from each other, are disposed in the vicinity of the one side.

  The three second rolling members (three steel balls 211A, 212B, 212C) in the blur image preventing mechanism 1 of the present embodiment are arranged from the front of the blur image preventing mechanism 1 as shown in FIG. A portion in the vicinity of the center at the top end (position indicated by reference symbol A2), a portion in the vicinity of the substantially upper right corner (position indicated by reference symbol B2) as viewed from the front of the blur image prevention mechanism 1, and the front face of the blur image prevention mechanism 1 As viewed from the position near the lower left corner (position indicated by reference numeral C2). In this case, when a virtual line is drawn by connecting the points of the three steel balls 211A, 211B, and 211C, a second triangle (ΔA2B2C2) is formed as shown in FIG. The second triangle (ΔA2B2C2) is a surface parallel to the light receiving surface of the image sensor 305 described later, and has a surface parallel to the first triangle (ΔA1B1C1). FIG. 18 shows the first triangle and the second triangle together.

  In the positions indicated by reference signs A2 and B2 in FIG. 17, the Y frame 201 is provided with a substantially rectangular hole 201e on both outer sides of the position where the pins 118 and 119 are disposed. A positioning boss 201f is provided in the vicinity of the hole 201e. FIG. 11 shows a cross-section at the positions indicated by reference signs A2 and B2 in FIG. 17 (portions where the steel balls 211A and 211B are disposed).

  A V-groove fitting 220 having a V-groove 220a extending in the direction of the arrow X in FIG. 1 is disposed in the hole 201e with the V-groove 220a fitted. This V-groove fitting 220 is formed so that its entire shape surrounds the two holes 201d of the Y frame 201, and a hole 220b is formed in a part thereof. The positioning boss 201f is fitted into the hole 220b. Thereby, the V-groove fitting 220 is fixed to the Y frame 201 (see FIGS. 4 and 5).

  On the other hand, when the anti-blurring mechanism 1 is assembled, the V-groove fitting 220 fixed to the X frame 303 is opposed to the V-groove fitting 220 fixed to the Y frame 201. Is arranged. This V-groove fitting 221 is formed having a V-groove 221a extending in the direction of arrow X in FIG. The V groove 221a of the V groove metal fitting 221 is fitted in a V groove portion 303g formed on the back side of the spring hooking portion 303b of the X frame 303. Further, the V-groove fitting 221 is fixed to the X frame 303 by fitting the hole 221a of the V-groove fitting 221 to the positioning boss 303h of the X frame 303 (see FIGS. 6, 7, and 11). .

  Furthermore, when the blur image preventing mechanism 1 is assembled, the spacer plate 223 is sandwiched between the two V-groove fittings 220 and 221. In the spacer plate 223, two holes 201d of the Y frame 201 and two holes 223a corresponding to the two holes 303d of the X frame 303 are formed. The spacer plate 223 is formed with holes 223b having substantially the same diameter as the steel balls 211A and 211B at positions corresponding to the V grooves 220a and 221a of the V groove fittings 220 and 221, respectively.

  When the blur image preventing mechanism 1 is assembled, the steel balls 211A and 211B can roll freely in the space formed by the V grooves 220a and 221a in the two V groove fittings 220 and 221. Arranged. Since the V grooves 220a and 221a of these two V groove fittings 220 and 221 are formed so as to extend in the direction of arrow X in FIG. 1, the steel balls 211A and 211B are formed in the direction of arrow X in FIG. It is disposed between the Y-direction drive unit 12 and the X-direction drive unit 13 so as to be freely rollable.

  On the other hand, at the position indicated by reference numeral C2 in FIG. 17, a substantially elliptical groove 214d (FIG. 1) having a long side extending along the arrow X direction in FIG. , FIG. 4, FIG. 5 and FIG. 12) are formed. At this time, the ball receiving plate member 215 is exposed on the bottom surface of the substantially elliptical groove 214d.

  Further, when the blur image preventing mechanism 1 is in an assembled state, the X-direction drive unit 13 has an X frame 303 side and a position substantially opposite to the approximately elliptical groove 214d at a position facing the approximately elliptical groove 214d. A substantially elliptical groove 303f of the same size is formed. In this substantially elliptical groove 303f, a metal ball receiving plate member 327 having the same shape and size as the bottom surface of the substantially elliptical groove 303f is fitted. The depth of the substantially elliptical groove 303f is set to be substantially the same as or slightly larger than the thickness of the ball receiving plate member 327 (see FIG. 7).

  Then, as shown in FIG. 12, one steel ball 211C is accommodated in the substantially elliptical groove 214d. At this time, the steel ball 211C is sandwiched between the ball receiving plate member 327 on the Y frame 201 side and the ball receiving plate member 327 on the X frame 303 side, and is held so as to be able to roll. Since the substantially elliptical groove 214d has a long side extending along the arrow X direction in FIG. 1, the steel ball 211C can roll in the arrow X direction in FIG. And the X-direction drive unit 13.

  Of the three second rolling members (211A, 211B, 211C), two rolling members (steel balls 211A, 212B) are the X-direction drive unit 13 (second moving member). It is indirectly pressed by the pressing member 320 that receives the urging force of the coil springs 323 and 324 through the X frame 303 in a direction perpendicular to the light receiving surface of the image sensor 305.

  As described above, according to the above-described embodiment, in the blur image preventing mechanism that is applied to the imaging device and prevents the blur image by moving the image sensor in a direction parallel to the light receiving surface, the pressing member 320 is a coil spring. By urging in the direction along the optical axis (Z-axis direction in FIG. 1) with the urging force of 323, 324 (the urging means), the movement of the image sensor light receiving surface in the same Z-direction is suppressed, Therefore, the image sensor light-receiving surface during the movement of the first and second moving members can be stably maintained.

  In addition, the number of pressing members can be reduced while stabilizing the movement of the first and second moving members in the direction parallel to the light receiving surface of the image sensor with a simpler structure, and thus the number of parts can be reduced. Thus, it is possible to achieve space saving and mechanism miniaturization by reducing the manufacturing cost, and at the same time, it is possible to contribute to a reduction in manufacturing cost.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and applications can of course be implemented without departing from the spirit of the invention. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the above-described embodiment, if the problem to be solved by the invention can be solved and the effect of the invention can be obtained, this constituent requirement is deleted. The configured structure can be extracted as an invention.

  The present invention is not limited to an imaging device such as a digital camera or a video camera, and other forms of electronic devices having a function of acquiring an image using an imaging device, such as a mobile phone, a recording device, an electronic notebook, The present invention can also be applied to various electronic devices with photographing functions such as personal computers, game devices, televisions, watches, navigation devices using GPS (Global Positioning System). Furthermore, the present invention can be similarly applied to an electronic device having a function of acquiring an image using an imaging element and displaying the acquired image on a display device, for example, an observation device such as a telescope, binoculars, and a microscope.

DESCRIPTION OF SYMBOLS 1 ... Blurred image prevention mechanism, 11 ... Non-drive unit, 12 ... Y direction drive unit, 13 ... X direction drive unit, 101 ... Fixed frame, 102 ... Y direction motor unit, 112A, 112B, 112C ... Steel ball, 113 ... Ball receiving plate member, 114 ... V groove fitting, 115,116 ... pin, 117 ... biasing member, 118,119 ... pin, 201 ... Y frame, 202 ... X direction motor unit, 211A, 211B, 211C ... steel ball, 214 ... Y spring hook member, 215, 216 ... ball receiving plate member, 217 ... steel ball, 218 ... spring, 220, 221 ... V groove fitting, 302 ... imaging element support plate, 303 ... dustproof holder, 303 ... X frame, 304 ... Imaging substrate, 305 ... Imaging element, 311 ... Imaging unit, 312 ... Dust-proof unit , 318 ... steel balls, 319 ... ball receiving plate member, 320 ... pressing member, 323, 324 ... coil spring, 326 ... urging member, 327 ... ball receiving plate member

Claims (3)

In the blurred image prevention mechanism of the imaging device,
An image sensor;
A base member that has a projection surface parallel to the light receiving surface of the imaging element and is mounted on the imaging device;
A first moving member mounted so as to be movable in a first direction parallel to the base member;
A second moving member that is mounted with the imaging device and is movably mounted in a second direction perpendicular to the first direction parallel to the base member;
An imaginary line that is disposed between the base member and the first moving member and that allows the first moving member to move in the first direction and connects each other with a space therebetween. Three first rolling members arranged to form a first triangle parallel to the light receiving surface;
An imaginary line that is disposed between the first moving member and the second moving member and that allows the second moving member to move in the second direction so as to connect each other with a space therebetween. Are three rolling members arranged so as to form a second triangle parallel to the first triangle, two of the three rolling members being the first rolling member. A second rolling member disposed along the one side of the first triangle so as to be spaced apart from each other in the vicinity of the one side;
A plate-like member for pressing and holding the first moving member and the second moving member in the direction of the base member, wherein the two rolling members out of the second rolling members. A pressing member that indirectly presses the moving member in the direction perpendicular to the light receiving surface via the second moving member;
A rolling member disposed between the pressing member and the second moving member, wherein the second moving member is movable in the first direction and the second direction. A third rolling member disposed in the vicinity of the two rolling members;
Biasing means for applying a pressing force to the pressing member;
An image blur prevention mechanism comprising:   The third rolling member is provided on the second moving member, and has a movement amount in the first direction and a movement amount in the second direction on a plane parallel to the light receiving surface. The blurred image prevention mechanism according to claim 1, wherein the combined movement amount is rolled.   The third rolling member includes three rolling members for arranging the pressing member in parallel with the light receiving surface, and supports the pressing member by the three rolling members, and the biasing means. The blur image preventing mechanism according to claim 2, wherein the pressing force acts on an inner side of a virtual third triangle formed by a side connecting the three rolling members.

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