JP2008312040A - Photographing unit, photographing device, portable equipment, and method for assembling photographing unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photographing unit capable of being easily assembled by matching optical axes of a lens and an image sensor to each other, a photographing device having the photographing unit, portable equipment having the photographing unit, and a method for assembling the photographing unit. <P>SOLUTION: A front peripheral edge of a CCD 112 and a reference surface of a lens holding frame 202 are densely contacted with each other to match the optical axes to each other by pressing the front peripheral edge of the CCD 112 which is the image sensor against the reference surface 2023 of a rear face of the lens holding frame 202, projected parts 112A, 112B of the CCD 112 are put in recessed parts 2024A, 2024B of the lens holding frame 202 near an pivot point PB. Then, the front peripheral edge of the CCD 112 and the side of the reference surface of the lens holding frame 202 are adhered to be fixed, and adhered to be fixed by pouring adhesives from the side of the pressing direction (rear of the axis direction of the lens) into a recessed part 2024A near PB. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a photographing unit that can be suitably used as a camera shake correction mechanism in an imaging device such as a digital camera or a camera-equipped mobile phone, a photographing device including the photographing unit, a portable device including the photographing device, and photographing. The present invention relates to a unit assembly method.

  2. Description of the Related Art Conventionally, various camera shake correction mechanisms have been employed in digital cameras and the like in order to suppress disturbances in captured images caused by user shake (see Patent Documents 1, 2, and 3).

  As such a camera shake correction mechanism, there is one that employs a so-called gimbal mechanism so that a holding module holding a photographing lens can be rotated in a pitching direction and a yawing direction.

  However, in the case of the gimbal mechanism as disclosed in Patent Document 1, it is necessary to arrange rotating joints and the like that freely rotate at four locations on the top, bottom, left, and right of the holding module. There is a tendency.

  Therefore, the shaft point that is one point along the outer periphery of the holding module is supported in a swingable manner, and the first point and the second direction that are different from the axial point along the outer periphery of the holding module are separated from each other. A drive structure for driving the holding module via each of the first drive point and the second drive point has been filed by the present applicant, and Japanese Patent Application Nos. 2006-269712, 2006-269713, and 2006-269714. Japanese Patent Application No. 2006-269715 has been proposed as an unpublished application. Further, the present applicant has made further improvements to these prior applications to improve the position detection accuracy of the holding module when the holding module is oscillating, and image blur correction disclosed in Japanese Patent Application No. 2007-035341. Proposed as a unit. When the drive structure proposed in these applications is realized, the photographing unit having an image blur correction function can be reduced in size and can be mounted on a portable device.

  Here, the operation of the image blur correction unit proposed by the applicant will be briefly described.

  FIG. 6 is a diagram for explaining the operation of the image blur correction unit proposed by the present applicant.

  6 (a) and 6 (b) show what kind of trouble occurs in the positional relationship between the lens and the sensor when blurring occurs, and FIG. 6 (c) shows It shows how blur is corrected by an image blur correction unit comprising a lens and a sensor.

  When camera shake does not occur as shown in FIG. 6A, the optical axis of the lens coincides with the optical axis of the light receiving surface (sensor surface) of the sensor, and the subject light is imaged at the correct position. On the other hand, when camera shake occurs, the lens and the sensor surface rotate in the direction of the arrows as shown in FIG. 6B, and the optical axis of the lens and the optical axis of the sensor surface are shifted so that the subject light is at the correct position. No image formation.

  Therefore, when the image blur correction unit is mounted on a portable device such as a mobile phone with a camera, and a camera shake occurs during photographing, a gyro is provided in the image blur correction unit composed of a lens and a sensor as shown in FIG. By performing such an operation, the subject light is always focused at the correct position on the sensor surface. When the image blur correction unit is mounted on a portable device such as a camera-equipped mobile phone in this way, even if the portable device is rotated by a shooting operation, the posture of the image blur correction unit is always maintained at the posture immediately before the shooting operation, and suitable shooting is possible. Is done.

By the way, a manufacturer of a portable device sometimes purchases an image sensor from a manufacturer different from the manufacturer that assembles the lens, and assembles the photographing unit at his / her own place. In assembling the photographing unit, it is necessary to accurately align the lens and the image sensor. For this reason, a reference surface for positioning the image sensor is provided on the rear surface of the lens holding frame that holds the lens, and when assembling the image sensor, the image sensor is pressed against the reference surface for alignment. Has been done. In this case, if the adhesive is applied to the reference surface, the position of the image sensor will be out of order. Therefore, when assembling the above-mentioned photographing unit, the front edge of the image sensor and the reference surface of the lens holding frame for holding the lens are usually in contact with each other. However, in the case of the above photographic unit, many parts such as a drive mechanism are built around the lens holding frame, so depending on the position, the front side of the image sensor In some cases, the peripheral portion and the side surface side of the reference surface of the lens holding frame cannot be fixed with an adhesive.
Japanese Patent Laid-Open No. 7-274056 JP 2005-326807 A Japanese Patent No. 2612371

  In view of the above circumstances, the present invention provides a photographing unit that can be easily assembled by aligning the optical axes of a lens and an image sensor, a photographing device that includes the photographing unit, a portable device that includes the photographing device, and a photographing device. An object is to provide a method for assembling a unit.

In order to achieve the above object, the photographing unit of the present invention captures a subject, a lens, a lens holding frame that holds the lens, and subject light that is attached to the rear surface of the lens holding frame and enters the lens from the front. A holding module having an image sensor for generating an image signal;
In a photographing unit comprising a drive mechanism for driving the holding module so that blurring of an image represented by the image signal is corrected,
The lens holding frame comes into contact with the rear surface from the front edge of the image sensor and serves as a reference surface for the position in the optical axis direction of the image sensor, and from the optical axis of the lens adjacent to the reference surface. And a bonding surface having a recess protruding outward and opening rearward,
The image sensor has a convex portion that enters the concave portion, which protrudes outward and away from the optical axis of the lens adjacent to the peripheral edge of the front surface in contact with the reference surface, and toward the lens. It is characterized by being fixed by an adhesive in the recess in a state of entering the recess.

  According to the photographing unit of the present invention, the front edge of the image sensor is pressed against the reference surface of the lens holding frame included in the photographing unit so that the optical axes of the image sensor and the lens are aligned and pressed. The convex portion can be firmly bonded and fixed by pouring an adhesive from the same direction as the direction of the protrusion.

  As a result, even if a position where the adhesive cannot be applied occurs, the photographing unit can be easily assembled by positioning the concave portion and the convex portion at that position.

  When the present invention is applied to a photographing unit considered by a prior application such as Japanese Patent Application No. 2007-035341 proposed by the present applicant, the concave portion and the convex portion are positioned near the axial point of the holding module. By doing so, suitable adhesive fixing is performed, and assembly is easily performed.

In other words, the holding module is further provided with a supporting member that supports the holding module at an axial point that is one point along the outer periphery of the holding module so that the holding module can swing freely.
The holding module is connected to the holding module via a first driving point and a second driving point respectively separated from the axial point along the outer periphery of the holding module in different first and second directions. A first drive mechanism for rotating the holding module around a first axis connecting the axis point and the second drive point via the first drive point. 1 drive mechanism and a second drive mechanism that rotates around a second axis connecting the axis point and the first drive point via the second drive point,
The lens holding frame includes an adhesive surface having a first recess protruding outward from a first side along a line segment connecting the axial point and the first driving point, and having the first concave portion opened rearward, and the axial point. And an adhesive surface having a second recess protruding outward from the second side along a line segment connecting the second driving point and the second driving point,
The image sensor has a first convex portion that enters and adheres to the first concave portion, and a second convex portion that enters and adheres to the second concave portion. Become.

  That is, in the vicinity of the axial point, the first convex portion and the second convex portion are pushed into the first concave portion and the second concave portion, respectively, and the adhesive is poured into the concave portion, so that the image sensor is a lens. Adhered and fixed to. For this reason, in the vicinity of the axial point, even if the side surface side of the contact surface between the image sensor and the lens is not adhesively fixed, the reference surface of the lens holding frame and the peripheral edge of the front surface of the image sensor are adhesively fixed.

  Further, when the present invention is applied to a prior application such as Japanese Patent Application No. 2007-035341, a further effect can be obtained.

That is, the first drive mechanism is
A first arm that rotatably supports the first drive point;
A first coil that is held by the first arm, receives a magnetic force and energization, generates a driving force in the optical axis direction, and causes the first arm to drive the first driving point in the optical axis direction; ,
A first magnet that is held by the support member and applies a magnetic force to the first coil and spreads horizontally with respect to the optical axis;
The first arm that is fixed to the support member and guides the first arm so that a first action point of the first arm that applies a driving force to the first driving point moves in the optical axis direction. And a guide member
The second drive mechanism is
A second arm that rotatably supports the second drive point;
A second coil that is held by the second arm, receives a magnetic force action and energization, generates a driving force in the optical axis direction, and causes the second arm to drive the second driving point in the optical axis direction; ,
A second magnet that is held by the support member and applies a magnetic force to the second coil and spreads horizontally with respect to the optical axis;
The second arm that is fixed to the support member and guides the second arm so that a second action point of the second arm that applies a driving force to the second driving point moves in the optical axis direction. It is good that it is an aspect provided with the guide member,
Further, a change in magnetic force received from the first magnet by the movement of the first arm in the optical axis direction when the first arm drives the first driving point supported by the first arm. A first sensor for detecting
Changes in magnetic force received from the second magnet due to movement of the second arm in the optical axis direction when the second arm is driven by the second arm and drives the second drive point. And a second sensor to be provided.

The first drive point and the second drive point are substantially the same as a line segment connecting the first drive point and the axis point and a line segment connecting the second drive point and the axis point. It is preferably formed at each position that intersects at an angle of 90 degrees,
Further, it is desirable that the holding module has a spherical convex portion at the axial point, and the support member has a spherical concave surface that receives the convex portion at the support portion.

  Further, the holding module has spherical convex portions at the first driving point and the second driving point, respectively, and the first arm and the second arm are the first action point and the Each of the second operating points has a spherical recess that receives each of the first drive point and each of the second drive points, and the first arm and the second arm. However, it is more preferable that a driving force is applied to each convex portion through each concave portion.

The imaging device of the present invention that achieves the above object is an imaging device including any one of the above imaging units, and further includes a blur detection unit that detects blur,
According to a detection result of the shake detection unit, the two drive mechanisms are provided with a shake control unit that rotationally drives the holding module,
A portable device of the present invention that achieves the above object is characterized by comprising the above-described photographing apparatus.

In addition, an assembling method of the photographing unit of the present invention that achieves the above-described problem is
A holding module having a lens, a lens holding frame that holds the lens, and an image sensor that is attached to the rear surface of the lens holding frame and that captures subject light incident on the lens from the front and generates an image signal; A driving mechanism that drives the holding module so that blurring of an image represented by the image signal is corrected, and the image sensor is configured such that the lens holding frame comes into contact with the rear surface of the image sensor and the image sensor front surface periphery. A reference surface serving as a reference for a position in the optical axis direction, and an adhesive surface having a concave portion that protrudes outwardly from the optical axis of the lens adjacent to the reference surface and opens rearward. , Entering the recess, projecting outwardly away from the optical axis of the lens and forward toward the lens adjacent to the peripheral edge of the front surface in contact with the reference surface A method of assembling a photographing unit having a non-convex portion,
A first step of assembling the lens, the lens holding frame, and the drive mechanism in a first clean environment, excluding the image sensor;
In a second cleanness environment higher than the first cleanness, the image is formed on the reference surface of the rear surface of the lens holding frame constituting the incomplete unit assembled in the first step before the image sensor is mounted. A second step of pressing the peripheral edge of the front surface of the sensor and fixing the convex portion with an adhesive in the concave portion in a state in which the convex portion of the image sensor enters the concave portion on the rear surface of the lens holding frame. And

  According to the assembling method of the photographing unit of the present invention, after assembling the lens, the lens holding frame, and the driving mechanism excluding the image sensor in the first step in an environment of a first cleanness, In the second step, the front edge of the image sensor is pressed against the reference surface of the rear surface of the lens holding frame constituting the incomplete unit before mounting the image sensor, and the convex portion of the image sensor enters the concave portion of the rear surface of the lens holding frame. In this state, the photographing unit can be easily assembled by performing the operation of fixing the convex portion with the adhesive in the concave portion.

  Further, since only the assembly in the second step has to be performed in the environment of the second cleanliness higher than the first cleanliness, all the assembly is performed in the second cleanliness higher than the first cleanliness. There is an advantage that the cost can be reduced as long as it does not have to be performed in a certain environment.

The image sensor comprises an image sensor, a substrate for mounting the image sensor, and a holder for holding the image sensor.
A third step of assembling the image sensor by mounting the imaging device on the substrate and fixing the holder to the substrate in an environment of a third cleanliness higher than the second cleanliness; Have
11. The photographing unit assembling method according to claim 10, wherein the second step is a step executed in a step after the third step.

  As described above, in the manufacturer of portable equipment, the image sensor is purchased from a manufacturer different from the manufacturer that assembles the lens, the lens holding frame, and the drive mechanism, and the photographing unit is installed at its own place. May be assembled. In such a case, if the above-described method for assembling the photographing unit is used, a corresponding effect is exhibited.

  As described above, the photographing unit that can be easily assembled by combining the optical axes of the lens and the image sensor, the photographing device including the photographing unit, the portable device including the photographing device, and the assembly of the photographing unit The method is realized.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an external perspective view of a mobile phone to which an embodiment of the present invention is applied.

  FIG. 1A shows a front view of the mobile phone 100. A liquid crystal panel 101 on which a menu screen, a photographed image, and the like are displayed on the front surface of the mobile phone 100, a speaker (see FIG. 2) is provided inside, and an earpiece 102 for emitting sound emitted from the speaker to the space, A selection button 104 used as a shutter button for selecting various functions and shooting, a push button 105 for inputting a telephone number, and a microphone (see FIG. 3) are provided therein to transmit voice to the microphone. No. 106 for transmitting and receiving images, address information, etc. by wireless communication for short distance without using the confirmation button 107 for confirming the telephone number entered by the user, the power button 108, and the telephone office. Two antennas 109a are provided.

  FIG. 1B shows a rear view of the mobile phone 100. On the back surface of the mobile phone 100, a first antenna 103a and a photographing lens 100a for transmitting and receiving data such as voice and mail via a telephone station are provided. The photographing lens 100a is held by a lens holding frame provided in a photographing unit described later.

  FIG. 2 is a block diagram showing an internal configuration of the mobile phone 100 of FIG.

  In the mobile phone 100, there are a photographing unit 200, an A / D (Analog / Digital) conversion unit 113, a microphone 121, a speaker 122, an interface unit 120, a first antenna 103a, a first transmission / reception unit 103, an input controller 130, an image. Various switches such as a signal processing unit 140, a video encoder 150, an image display device 160, a second antenna 109a, a second transmission / reception unit 109, a memory 170, a CPU 180, a media controller 190, and the selection button 104 and push button 105 shown in FIG. 181 and a recording medium 190a are connected. In the present embodiment, a photographing unit 200 including a gyro sensor 182 and drivers DR1 and DR2, a CPU 180, an input controller 130, an image signal processing unit 140, a video encoder 150, an image display device 160, a liquid crystal panel 101, a media controller 190, The recording medium 190a constitutes an example of the photographing apparatus of the present invention. An example in which a CCD solid-state imaging device 112 (referred to as CCD in the following description) is used as an image sensor in the photographing unit is shown.

  The CPU 180 transmits processing instructions to the various elements of the mobile phone 100 shown in FIG. 2 and controls the various elements. For example, when the selection button 104 in FIG. 1 is pressed in a state where a photographing mode for photographing is set, an instruction is given from the CPU 180 to the CCD 112 included in the photographing unit 200 and camera shake detected by the gyro sensor 182 is canceled out. An instruction is given to the drivers DR1 and DR2 to swing a holding module (described later) included in the photographing unit 200 in the direction, and photographing is performed while correcting camera shake. The configuration of the photographing unit 200 will be described in detail later.

  In response to pressing of the selection button 104 in FIG. 1A, the CPU 180 sets an electronic shutter in the CCD 112 in the photographing unit 200 and starts photographing processing.

  At this time, the direction of camera shake when the selection button 104 is pressed is detected by the gyro sensor 182 and notified to the CPU 180. The CPU 180 receives the detection result of the gyro sensor 182 and notifies the drivers DR1 and DR2 of the correction direction, causes the drivers DR1 and DR2 to drive a coil (described later) in the photographing unit 200, and a holding module ( Shooting is carried out while rocking (described later) according to the shake. In this way, camera shake when the selection button 104 is pressed is corrected, and subject light is imaged without blurring on the CCD 112.

  The CCD 112 receives subject light that has passed through the photographing lens 100a during the shutter speed of the electronic shutter, and reads a subject image based on the subject light as a subject signal that is an analog signal. The subject signal generated by the CCD 112 is converted into digital captured image data by the A / D conversion unit 113, and the converted captured image data is sent to the image signal processing unit 140 via the input controller 130.

  The image signal processing unit 140 performs image processing such as RGB level adjustment and gamma adjustment on the image data, and further performs compression processing on the image data after the image processing. The compressed image data is once sent to the memory 170.

  The memory 170 stores a program to be executed in the mobile phone 100, a high-speed SDRAM used as an intermediate buffer, data for various menu screens, data stored by a user, and the like. An SRAM that is a storage memory and a VRAM that stores compressed image data are included. The VRAM is divided into a plurality of areas, image data is stored in the plurality of areas in order, and the stored image data is sequentially read out to the video encoder 150 and the media controller 190.

  The video encoder 150 acquires compressed image data from the memory 170 in accordance with an instruction from the CPU 180, and converts the compressed image data into a data format that can be displayed on the liquid crystal panel 101. The converted image data is sent to the image display device 160, and the image display device 160 displays an image represented by the image data on the liquid crystal panel 101. The media controller 190 is for recording the compressed image data stored in the memory 170 on the recording medium 190a and for reading the image data recorded on the recording medium 190a.

  In addition, when a telephone number is input using the push button 105 shown in FIG. 1A and the confirm button 107 is pressed, the telephone number is set and communication with the partner apparatus is started. At this time, communication information such as the telephone number of the mobile phone 100 and the input telephone number is transmitted from the CPU 180 to the first transmission / reception unit 103, the communication information is converted into radio waves and transmitted to the antenna 103a, and radio waves are transmitted from the antenna 103a. Be emitted. The radio wave emitted from the first antenna 103a is transmitted to a telephone station via a joint antenna (not shown) provided at various places such as a building and a power pole, and the other party to which a designated telephone number is assigned at the telephone station. A connection with the device is established.

  When the connection with the counterpart device is established, the voice uttered by the user toward the mobile phone 100 is collected by the microphone 121, and the collected voice is converted into radio waves representing voice data by the interface unit 120. 1 is transmitted to the counterpart device by the first antenna 103a of the transceiver 103. The radio wave received via the first antenna 103a is converted into audio data by the interface unit 120 and emitted from the speaker 122 as audio. The first transmission / reception unit 103 and the first antenna 103a transmit / receive not only voice data but also mail data representing mail using a mail address instead of a telephone number. The mail data received by the first antenna 103a and digitized by the first transmission / reception unit 103 is stored in the memory 170 by the input controller 130.

  In addition, the mobile phone 100 does not pass through the telephone office, apart from the communication interface (the first transmitting / receiving unit 103 and the first antenna 103a) for communicating with other devices such as other mobile telephones through the telephone office. In addition, a wireless communication interface (second transmission / reception unit 109, second antenna 109a) for performing communication by short-range wireless communication is also provided. As a communication interface for near field communication, infrared communication, Bluetooth, or the like can be applied. In the present embodiment, infrared communication is applied as a communication interface. When infrared light directly transmitted from another mobile phone or the like is received by the second antenna 109a, an electric signal based on the received infrared light is transmitted. 2 Picked up by the transmitting / receiving unit 109 and converted into digital data. Conversely, when data is transmitted to the external device, the data is transmitted to the second transmission / reception unit 109, and the data is converted into radio waves by the second transmission / reception unit 109 and emitted from the second antenna 109a.

  When infrared rays representing an image are received by the second antenna 109a, the second transmitting / receiving unit 109 converts an electrical signal based on the infrared rays into image data. The converted image data is sent to the image display device 160 and the image represented by the image data is displayed on the liquid crystal panel 101 or recorded on the recording medium 190a via the media controller 190 in the same manner as the captured image data. .

  The mobile phone 100 is basically configured as described above.

  Next, the configuration of the photographing unit 200 included in the photographing device included in the mobile phone 100 will be described.

  FIG. 3 is an exploded perspective view of the photographing unit 200. FIG. 4 is a view showing the photographing unit 200 after each member shown in the exploded perspective view of FIG. 3 is incorporated. However, FIGS. 3 and 4 do not show the lens 112 a and the CCD 112 among the CCDs 112 constituting the holding module in the photographing unit 200. A method of incorporating the CCD 112 into the photographing unit 200 will be described later.

  3 and 4, the lower left corresponds to the subject side.

  3 shows the coils formed on both the cover 201, the lens holding frame 202, the substrate 203A extending in the first direction of FIG. 3 and the substrate 203B extending in the second direction of FIG. A pair of arms ARM1 and ARM2 that hold the substrates 203A and 203B on which coils are formed, and an N pole and an S pole so as to face the coils formed on the substrates 203A and 203B, respectively. The U-shaped yokes 204A and 204B for holding the magnets MAG1 and MAG2 arranged side by side are movably supported, and the two yokes 204A and 204B are respectively provided in the first direction and the second direction. The supporting members 205 fixed to the surfaces extending in the direction are shown in a state where they are disassembled in order. When these are assembled, the shape shown in FIG. 4 is obtained.

  First, the configuration will be described with reference to FIG.

  The rightmost side of FIG. 3 shows a dog-shaped support member 205 that supports two drive mechanisms for swinging the lens holding frame 202. Two drive mechanisms for swinging the lens holding frame 202 are supported by the support member 205 and the lens holding frame 202 is swingably supported. The lens holding frame 202 is assembled with a CCD 112 later, and a holding module including the lens 100a, the lens holding frame 202 holding the lens, and the CCD 112 behind the lens is supported by the support member 205 so as to be swingable. It will be. Although the CCD 112 is not shown in FIG. 3 because it is incorporated later, the periphery of the CCD front surface is in contact with the rear surface of the lens holding frame 202 in FIG. A reference surface (to be described later) serving as a reference for the position and an adhesive surface having concave portions 2024A and 2024B that protrude outwardly and open to the rear adjacent to the reference surface and away from the optical axis of the lens are provided. Details of the reference surface and the adhesive surface will be described later.

  The support member 205 is provided with three guide members 2051, 2052, 2053 through which holes H1, H2, H3, H4 provided at both ends of the two arms ARM1, ARM2 are respectively inserted. ing. These guide members 2051 to 2053 are respectively provided at the apexes of the support member 205 having a dogleg shape, and the central guide member 2051 has holes at both ends of both arms ARM1 and ARM2. Of these, the hole H1 and the hole H3 are inserted in common.

  That is, one arm ARM1 of the two is inserted into the guide member 2051 at the apex of the center of the V shape of the support member 205 and the guide member 2052 at the apex on the one end side of the V shape, The other arm ARM2 is inserted through the guide member 2051 at the apex of the center of the dogleg shape and the guide member 2053 at the apex on the other end side. Although not shown in the figure, the holding module side on one end side of the arms ARM1 and ARM2 (where the holes H2 and H4 are provided) engages with a spherical convex portion on the holding module side. Recesses are provided respectively. In addition, a support portion for supporting the lens holding frame 202 is provided on the lens holding frame side of the center portion of the V shape of the supporting member 205, and a concave portion is provided in this supporting portion.

  In addition, U-shaped yokes 204A and 204B are bonded and fixed to the surface extending in the first direction and the surface extending in the second direction in FIG. It has come to be. Since these U-shaped yokes 204A and 204B are arranged so that the openings are directed to the side where the substrates 203A and 203B on which the coils are formed are located, they are parallel to the magnets MAG1 and MAG2 from the respective opening sides. Thus, the substrates 203A and 203B are arranged so as to be accommodated. Each of the substrates 203A and 203B is connected to a flexible substrate FR2 for energizing a coil on the substrate. The substrates 203A and 203B on which the coils are formed are provided with a Hall element for detecting the position of the holding module 202 that swings according to the movement of the arms ARM1 and ARM2.

  As described above, the support portion for supporting the lens holding frame 202 by engaging the spherical convex portion of the lens holding frame 202 on the lens holding frame 202 side of the central apex portion of the V-shaped support member 205. Since the convex portion PB of the lens holding frame 202 is engaged with the concave portion, the concave portion is provided on each of the two arms ARM1 and ARM2 movably supported by the support member 205. When the spherical concave portion engages with the convex portion of the first driving point D1 and the convex portion of the second driving point D2 of the lens holding frame 202, the lens holding frame 202 can swing freely as shown in FIG. It will be supported by 205.

  In this example, the support member 205, the arm ARM1, the substrate 203A on which the coil is formed, and the yoke 204A to which the magnet MAG1 is attached constitutes an example of the first drive mechanism according to the present invention, and the support member 205 and the arm ARM2 The substrate 203B on which the coil is formed and the yoke 204B to which the magnet MAG2 is attached constitutes an example of the second drive mechanism referred to in the present invention. The first driving mechanism rotates the lens holding frame 202 around the first axis connecting the axis point PB and the second driving point D2 via the first driving point D1 and the second axis. The driving mechanism of the lens is pivoted about the second axis connecting the axis point PB and the first driving point D1 via the second driving point D2, thereby swinging the lens holding frame 202. Become.

  In FIG. 3, in order to show the first driving point D1 and the second driving point D2, rod-shaped members 2021A and 2021B having spherical convex portions and springs 2022A inserted through the rod-shaped members 2021 are shown. 2022B is shown respectively. Each spring 2022 is a member having a function of preventing movement of each of the two arms ARM1 and ARM2 when the coil is not energized, and each spring has a convex portion (first portion when the coil is not energized. The driving point D1 and the second driving point D2) are pressed against the recess on the arm side by spring bias, and then the coil is deenergized and then the arm is stopped at the position where the coil was deenergized. It has a function.

  The description regarding the photographing unit 200 so far is almost the same as the description of the configuration of the image blur correction unit proposed in Japanese Patent Application No. 2007-035341, except that the CCD 112 is incorporated later.

  Here, in the photographing unit 200 of the present embodiment, the CCD 112 purchased by the portable device manufacturer is improved so that it can be incorporated into the photographing unit 200 shown in FIG. 4 later. The configuration will be described.

  FIG. 5A and FIG. 5B are diagrams illustrating the configuration.

  FIG. 5A shows a view of the photographing unit 200 of FIG. 4 as viewed from the rear side and a CCD 112 that is incorporated into the photographing unit later. FIG. 5B shows the state of FIG. The state after the CCD 112 is assembled in the lens holding frame 202 is shown.

  In this embodiment, for simplicity of explanation, the term “CCD 112” is used as a term indicating an image sensor in the present invention, but in actuality, as shown on the right side of FIG. The CCD 112 is mounted on the substrate PCB, the CCD 112 is fitted into the CCD holder 1120, and a filter or the like is further incorporated to constitute an example of the image sensor according to the present invention. The convex portions 112A and 112B are formed on the CCD holder. 1120.

  In the conventional photographing unit 200, since the drive mechanism is mounted in the vicinity of the axis point PB, the reference surface of the lens holding frame 202 provided in the photographing unit and the side surface side of the front edge of the CCD 112 cannot be bonded and fixed. A structure that makes it possible to easily perform adhesion and fixing near the point PB is proposed. The structure will be described with reference to FIGS. 5 (a) and 5 (b).

  As shown in FIG. 5 (a), the CCD 112 protrudes outwardly from the front in the optical axis direction of the lens 100a and forward toward the lens 100a, adjacent to the peripheral edge of the front surface in contact with the reference surface 2023 of the lens holding frame 202. Convex portions 112A and 112B that enter the concave portions 2024A and 2024B of the lens holding frame 202 are newly provided.

  Further, as shown in FIG. 5A, the lens holding frame 202 is provided with concave portions 2024A and 2024B into which the convex portions 112A and 112B on the front peripheral edge of the CCD 112 enter.

  As described above, when the CCD 112 is provided with the convex portions 112A and 112B and the lens holding frame 202 is provided with the concave portions 2024A and 2024B, the front peripheral edge of the CCD 112 is pressed against the reference surface of the lens holding frame 202. Thus, the convex portions 112A and 112B of the CCD 112 are pushed into the concave portions 2024A and 2024B of the lens holding frame 202, and the side surfaces other than the vicinity of the axial point PB are bonded and fixed with an adhesive, and light is emitted near the axial point PB. Adhesive can be poured into the recess from the rear side of the shaft to be fixed.

  That is, the optical axis of the lens 100a held by the CCD 112 and the lens holding frame 202 can be matched by simply performing a simple operation of pressing the lens 100a from the optical axis direction, and an adhesive is applied to the side surface. In addition, the photographing unit can be assembled by performing a simple operation of pouring from the same direction as the direction of pressing against the concave portions 2024A and 2024B of the lens holding frame 202.

  Further, as described above, a manufacturer of a portable device may purchase the CCD 112 from a manufacturer different from the manufacturer that assembles the lens and assemble the photographing unit at their own place.

  In that case, an incomplete unit consisting of a lens 100a, a lens holding frame 202, and two drive mechanisms, which constitute a part of the left photographing unit in FIG. 5A, and a right part in FIG. 5A. Image sensors can be purchased from different manufacturers, and the photographing unit 200 can be easily assembled.

  As described above, the photographing unit that can be easily assembled by combining the optical axes of the lens and the image sensor, the photographing device including the photographing unit, the portable device including the photographing device, and the assembly of the photographing unit The method is realized.

1 is an external perspective view of a mobile phone to which an embodiment of the present invention is applied. FIG. 2 is a block diagram showing an internal configuration of the mobile phone 100 in FIG. 1. It is a disassembled perspective view of an imaging unit. It is a figure which shows the state after an imaging | photography unit was assembled by each member shown by the exploded perspective view of FIG. It is a figure explaining the structure of this invention. It is a figure explaining the structure of this invention. It is a figure explaining the effect | action of the image blur correction unit which this applicant proposes.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Mobile phone 101 Liquid crystal panel 102 Mouthpiece 103a 1st antenna 104 Selection button 105 Push button 106 Earpiece 107 Confirmation button 108 Power button 109a 2nd antenna 112 CCD
113 A / D conversion unit 120 Interface unit 121 Microphone 122 Speaker 130 Input controller 140 Image signal processing unit 150 Video encoder 160 Image display device 170 Memory 180 CPU
181 Various switches 200 Imaging unit 100a Lens 201 Cover 202 Lens holding frame 203A, 203B Substrate 204A, 204B Yoke 2051, 2052, 2053 Guide member FR1, FR2 Flexible substrate ARM1, ARM2 Arm PB Axis point (spherical convex part)
D1 1st driving point (spherical convex part)
D2 Second driving point (spherical convex part)

Claims (11)

A holding module having a lens, a lens holding frame that holds the lens, and an image sensor that is attached to the rear surface of the lens holding frame and that captures subject light incident on the lens from the front and generates an image signal;
In a photographing unit comprising a drive mechanism for driving the holding module so that blurring of an image represented by the image signal is corrected,
The lens holding frame has a reference surface that serves as a reference for the position in the optical axis direction of the image sensor when the front edge of the image sensor contacts the rear surface, and the optical axis of the lens adjacent to the reference surface. And a bonding surface having a recess protruding outward and opening rearward,
The image sensor has a convex portion that enters the concave portion and protrudes outwardly away from the optical axis of the lens adjacent to the front surface periphery in contact with the reference surface and toward the lens, and the convex portion, A photographing unit characterized in that the photographing unit is fixed by an adhesive in the concave portion in a state of entering the concave portion. A support member that supports the holding module at an axial point that is a point along the outer periphery of the holding module so that the holding module can swing freely;
The holding module is connected to the holding module via a first driving point and a second driving point that are separated from the axial point in the first direction and the second direction, respectively, along the outer periphery of the holding module. A first driving mechanism for rotating the holding module around a first axis connecting the axis point and the second driving point via the first driving point. 1 drive mechanism and a second drive mechanism that rotates around a second axis that connects the axis point and the first drive point via the second drive point,
The lens holding frame includes an adhesive surface having a first recess protruding outward from a first side along a line segment connecting the axis point and the first drive point, and opening rearward. And an adhesive surface having a second recess protruding outward from the second side along a line connecting the second driving point and the second driving point,
2. The image sensor according to claim 1, wherein the image sensor includes a first convex portion that enters and adheres to the first concave portion, and a second convex portion that enters and adheres to the second concave portion. The shooting unit described. The first drive mechanism is
A first arm that rotatably supports the first drive point;
A first coil that is held by the first arm, receives a magnetic force and current, generates a driving force in the optical axis direction, and causes the first arm to drive the first driving point in the optical axis direction; ,
A first magnet that is held by the support member and applies a magnetic force to the first coil and spreads horizontally with respect to the optical axis;
A first guide that is fixed to the support member and guides the first arm so that a first action point of the first arm that applies a driving force to the first drive point moves in the optical axis direction. And a guide member
The second drive mechanism is
A second arm that rotatably supports the second drive point;
A second coil which is held by the second arm, receives a magnetic force action and energization, generates a driving force in the optical axis direction, and causes the second arm to drive the second driving point in the optical axis direction; ,
A second magnet that is held by the support member and applies a magnetic force to the second coil and spreads horizontally with respect to the optical axis;
The second arm that is fixed to the support member and guides the second arm so that a second action point of the second arm that applies a driving force to the second driving point moves in the optical axis direction. The photographing unit according to claim 2, further comprising: a guide member. Further, a change in magnetic force received from the first magnet by the movement of the first arm in the optical axis direction when the first arm drives the first driving point supported by the first arm. A first sensor for detecting
Changes in magnetic force received from the second magnet due to movement of the second arm in the optical axis direction when the second arm drives the second drive point supported by the second arm are detected. The photographing unit according to claim 3, further comprising: a second sensor that performs the operation.   The first drive point and the second drive point are substantially equal to each other by a line segment connecting the first drive point and the axis point and a line segment connecting the second drive point and the axis point. 5. The photographing unit according to claim 2, wherein the photographing unit is formed at each position intersecting at an angle of 5 degrees.   The said holding module has a spherical convex part in the said axial point, The said supporting member has a spherical concave surface which receives this convex part in the said support part, The Claim 2 to 5 characterized by the above-mentioned. The photographing unit according to any one of claims.   The holding module has spherical convex portions at the first driving point and the second driving point, respectively, and the first arm and the second arm are the first action point and the second driving point, respectively. Each of the two operating points has spherical concave portions that receive the convex portions provided at the first driving point and the second driving point, respectively, and the first arm and the second arm are The photographing unit according to any one of claims 2 to 6, wherein a driving force is applied to each convex portion through each concave portion. An imaging device comprising the imaging unit according to any one of claims 1 to 7, further comprising a blur detection unit for detecting blur,
An imaging apparatus comprising: a blur control unit that causes the two drive mechanisms to rotationally drive the holding module according to a detection result of the blur detection unit.   A portable device comprising the photographing apparatus according to claim 8. A holding module having a lens, a lens holding frame that holds the lens, and an image sensor that is attached to the rear surface of the lens holding frame and that captures subject light incident on the lens from the front and generates an image signal; A driving mechanism that drives the holding module so that blurring of an image represented by the image signal is corrected, and the image sensor has a lens holding frame that comes into contact with the rear surface of the front surface of the image sensor. A reference surface that serves as a reference for the position in the optical axis direction, and an adhesive surface that is adjacent to the reference surface and protrudes outwardly away from the optical axis of the lens and has a recess opened rearward. , Adjacent to the front peripheral edge in contact with the reference surface, projecting outwardly away from the front of the optical axis of the lens and forward toward the lens, entering the recess Part A method of assembling a photographing unit having,
A first step of assembling the lens, the lens holding frame, and the drive mechanism in a first clean environment, excluding the image sensor;
In a second cleanness environment higher than the first cleanness, the image is formed on the reference surface of the rear surface of the lens holding frame that is assembled in the first step and forms an incomplete unit before the image sensor is mounted. A second step of pressing the front peripheral edge of the sensor and fixing the convex portion with an adhesive in the concave portion in a state where the convex portion of the image sensor enters the concave portion on the rear surface of the lens holding frame. Assembling method of shooting unit. The image sensor includes an image sensor, a substrate for mounting the image sensor, and a holder for holding the image sensor.
A third step of assembling the image sensor by mounting the imaging device on the substrate and fixing the holder to the substrate in an environment of a third cleanliness higher than the second cleanliness; Have
The method according to claim 10, wherein the second step is a step executed in a process after the third step.

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