JP2019079031A - Imaging apparatus - Google Patents

Abstract

To provide an imaging apparatus having an encapsulation structure capable of encapsulating a gap in a periphery of a tilt part regardless of a tilt angle of an image pick-up device.SOLUTION: An imaging apparatus includes: an image pick-up device configured to convert an image obtained through an imaging lens into an electronic signal; an image pick-up device holder configured to hold the image pick-up device; a base member configured to rotatably support the image pick-up device holder; a driving member configured to rotate the image pick-up device holder so as to tilt the image pick-up device with regard to a plane orthogonal to an optical axis of the imaging lens; and an encapsulation member configured to encapsulate between the base member and the image pick-up device holder. The encapsulation member is configured to deform following a rotation of the image pick-up device holder.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an imaging device.

  In a network camera or the like represented by a surveillance camera, the camera unit can form an image by imaging incident light having passed through the lens unit with an imaging device.

  Generally, the acquired image is in a good imaging state when the subject within the depth of field is photographed, and becomes an image in which the imaging state is deteriorated when the subject outside the depth of field is photographed.

  In particular, when the aperture is opened and used, a shooting range outside the depth of field tends to occur in the shooting screen range. Therefore, in the monitoring application, for example, when a subject such as the face of a person is present in a poor range of the imaging state, the subject can not be recognized. In such a case, the depth of field can be increased by reducing the aperture. However, in the nighttime monitoring, the diaphragm may be opened and used in order to capture a large amount of light, and therefore the diaphragm may not be able to be narrowed. Also, it is conceivable to install a plurality of surveillance cameras according to the distance to the subject so that the subject enters within the depth of field, but since the number of cameras increases, it is possible to use one camera in the subject field. A camera with a deep depth is desirable.

  Therefore, as a technique for increasing the depth of field when the aperture is open, there is a camera technology with an Aori function that tilts the imaging element with respect to the lens unit to widen the depth range of the field.

  However, when the imaging element is tilted with respect to the lens unit, a gap is generated around the tilting unit. It is desirable that the gap be sealed in order to prevent foreign matter that has entered the camera unit from the gap from being reflected in the captured image.

  Some conventional imaging devices without the tilt function have a sealing member disposed between an imaging element and an optical filter in order to prevent foreign matter from entering the camera unit.

  For example, Patent Document 1 proposes a structure in which a frame on which a seal glass and an imaging device are attached is bonded with a seal resin.

JP, 2016-139763, A

  However, in the case of an imaging apparatus equipped with a camera technology with a tilt function that tilts the imaging element with respect to the lens unit, the size of the gap around the tilting unit changes by tilting the imaging element with respect to the lens unit. Therefore, when the sealing structure as described in Patent Document 1 is applied to an imaging device with an oblique function, it is conceivable that the gap can not be sealed when the tilt angle becomes large.

  Therefore, the present invention provides an imaging device provided with a sealing structure capable of sealing a gap around the tilting portion regardless of the tilting angle of the imaging element.

  An imaging apparatus according to the present invention includes an imaging element that converts an image obtained through an imaging lens into an electronic signal, an imaging element holder that holds the imaging element, a base member that rotatably supports the imaging element holder, A drive member for rotating the imaging element holder so as to incline the imaging element with respect to a plane orthogonal to the optical axis of the imaging lens, and a sealing member for sealing between the base member and the imaging element holder And the sealing member deforms following the rotation of the image pickup device holder.

  The present invention can provide an imaging device provided with a sealing structure capable of sealing a gap around the tilting portion regardless of the tilting angle of the imaging device.

It is an exploded perspective view of a network surveillance camera of a 1st embodiment. It is a perspective view at the time of attaching an image pick-up element unit to a lens barrel of a 1st embodiment. FIG. 2 is an exploded perspective view of a lens barrel and an imaging element unit according to the first embodiment. (A) is a perspective view of the image pick-up element unit in 1st Embodiment. (B) is sectional drawing of the image pick-up element unit in 1st Embodiment. (C) is a sectional view of an image sensor unit at the time of rotating an image sensor in a 1st embodiment. It is sectional drawing of the image pick-up element unit in 2nd Embodiment. It is an exploded perspective view of a network surveillance camera of a 3rd embodiment. It is a disassembled perspective view of the imaging device in 3rd Embodiment. It is a perspective view of an imaging device in a 3rd embodiment. (A) is sectional drawing of the imaging device in 3rd Embodiment. (B) is sectional drawing of an imaging device at the time of rotating the imaging device in 3rd Embodiment. (A) is sectional drawing of the imaging device in 4th Embodiment. (B) is a sectional view of an imaging device at the time of rotating an imaging device in a 4th embodiment. It is a perspective view in the state where the cover was removed from the imaging device in a 4th embodiment. It is a perspective view of the state which removed the cover from the imaging device in 5th Embodiment. (A) is sectional drawing of the imaging device in 6th Embodiment. (B) is a sectional view of an imaging device at the time of rotating an imaging device in a 6th embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First Embodiment
FIG. 1 is a block diagram of a network surveillance camera (hereinafter referred to as a surveillance camera) which is an example of an imaging device. FIG. 2 is a perspective view when the imaging device unit is attached to the lens barrel of the first embodiment. FIG. 3 is an exploded perspective view of the lens barrel and the imaging device unit according to the first embodiment.

  The network surveillance camera comprises a cover 2, a dome cover 3, a lens barrel 4, an imaging device unit 5, and a pan tilt rotation unit 6.

  The cover 2 has an opening at the center of which the dome cover 3 is disposed, and constitutes a housing together with the pan tilt rotation unit 6.

  The dome cover 3 is hemispherical and covers the lens barrel 4. The dome cover 3 is fixed by being sandwiched between the cover 2 and the pan tilt rotation unit 6.

  The pan-tilt rotation unit 6 supports the lens barrel 4 mounted with the imaging element unit 5 rotatably in pan, tilt, and rotation directions. The pan and tilt rotation unit 6 is fastened to the cover 2 by a fastening screw 1.

  The lens barrel 4 includes lenses of a fixed group and a movable group as an imaging lens, a front fixed frame 7, and guide bars 15, 16, 19 and 20. The lens barrel 4 further includes a lens moving frame 10, an aperture unit 12, a lens fixing frame 13, a lens moving frame 17, a rear fixed frame 23, and the like.

  The lenses of the fixed group and the movable group include a fixed lens 8 fixed in the optical axis direction, a zoom lens 9 which moves in the optical axis direction to perform a zooming operation, and a fixed lens 14 fixed in the optical axis direction. . The lenses of the fixed group and the movable group further include a focus lens 18 which moves in the optical axis direction to perform focusing operation, and a fixed lens 25 which is fixed in the optical axis direction. The front fixed frame 7 holds the fixed lens 8. The lens moving frame 10 holds the zoom lens 9. The lens moving frame 10 is movably held by the guide bar 15 in the optical axis direction. The rotation of the lens moving frame 10 is restricted by the engagement of the guide bar 16 and the U groove on the lens moving frame 10.

  The rack 11 is fixed to the lens moving frame 10 in a state of being biased in the optical axis direction and the rotational direction by a rack spring (not shown), and engaged with the screw portion of the stepping motor 22. It moves in the optical axis direction with the moving frame 10.

  The aperture unit 12 adjusts the amount of incident light of the lens barrel 4. The aperture unit 12 is fixed to the lens fixing frame 13 by screws (not shown).

  The lens fixing frame 13 holds the fixed lens 14. The lens moving frame 17 holds the focus lens 18. The lens moving frame 17 is movably supported by the guide bar 20 in the optical axis direction. The rotation of the lens moving frame 17 is restricted by the engagement of the guide bar 19 and the U groove on the lens moving frame 17. A rack (not shown) connected to the lens moving frame 17 is fixed to the lens moving frame 17 in a state of being biased in the optical axis direction and the rotational direction by a rack spring (not shown). And move in the optical axis direction together with the lens moving frame 17 by the rotation of the screw portion.

  The rear fixed frame 23 holds the fixed lens 25. The front fixed frame 7 and the fixed lens frame 13 are fixed to the rear fixed frame 23 by screws (not shown). The guide bars 15 and 20 are fixed so as to be sandwiched between the front fixed frame 7 and the rear fixed frame 23. The guide bar 16 is fixed so as to be sandwiched between the front fixing frame 7 and the lens fixing frame 13. The guide bar 19 is fixed so as to be sandwiched between the lens fixing frame 13 and the rear side fixing frame 23. The photo interrupters 21 and 26 are fixed to the FPC (not shown) by soldering. The FPC is connected to the diaphragm unit 12, the stepping motors 22, 24, 101, 102 and the photo interrupters 21, 26, and is activated by energization.

  The photo interrupter 21 is disposed on the moving area of the lens moving frame 10, and controls the position of the lens moving frame 10 by the output of the photo interrupter 21 and the number of drive pulses of the stepping motor 22. The photo interrupter 26 is disposed on the moving area of the lens moving frame 17, and controls the position of the lens moving frame 17 by the output of the photo interrupter 26 and the number of drive pulses of the stepping motor 24.

  Next, the optical filter drive mechanism 100 will be described. The optical filter driving mechanism 100 inserts the infrared cut filter 107 or the dummy glass 108 on the optical path or retracts the infrared cut filter 107 or the dummy glass 108 from the optical path. The optical filter driving mechanism 100 inserts the infrared cut filter 107 on the optical path in the day mode, retracts the infrared cut filter 701 from the optical path in the night mode, and inserts the dummy glass 108 on the optical path.

  The filter holding frame 109 holds the dummy glass 108 and is supported by the guide bars 105 and 106 fixed to the rear fixed frame 23 so as to be movable in a direction substantially perpendicular to the optical axis. The gear unit 103 engaged with the stepping motor 101 fixed to the rear fixed frame 23 by the screw 111 engages with the gear portion provided on the filter holding frame 109, and the filter holding frame 109 is substantially perpendicular to the optical axis Drive in the direction.

  The filter holding frame 110 holds the infrared cut filter 107, and is supported by the guide bars 105 and 106 so as to be movable in a direction substantially perpendicular to the optical axis. The gear unit 104 engaged with the stepping motor 102 fixed to the rear fixed frame 23 with the screw 112 engages with the gear portion provided on the filter holding frame 110, and the filter holding frame 110 is substantially perpendicular to the optical axis Drive in the direction.

  Next, the imaging element unit 5 will be described using FIGS. 2 to 4. FIG. 4A is a perspective view of the image sensor unit in the first embodiment. FIG. 4B is a cross-sectional view of the imaging element unit in the first embodiment. FIG. 4C is a cross-sectional view of the image sensor unit when the image sensor in the first embodiment is rotated.

  The imaging device unit 5 includes a tilt base 501, a sealing member 502, an imaging device holder 503, and an imaging device sealing member 511.

  The tilt base 501 as a base member is fixed to the rear fixed frame 23 by screws (not shown). The imaging element 516 converts an image obtained through the imaging lens into an electronic signal. The imaging element 516 is soldered to a circuit board 518 electrically connecting the imaging element 516 and attached to the imaging element sheet metal 512 with an adhesive (not shown). The FPC 517 connects the circuit board 518 to the zoom lens 9, the focus lens 18, the aperture unit 12, and a drive circuit board (not shown) of the optical filter drive mechanism 100.

  The imaging element holder 503 can tilt with respect to a plane orthogonal to the optical axis. Bearings 504 and 507 are disposed on the tilting axis of the image sensor holder 503. Further, a wave washer 505 and a bearing washer 506 are disposed between the imaging device holder 503 and the bearing 507, and the imaging device holder 503 is biased in the tilting axis direction by the wave washer 505 and the bearing washer 506. . Further, the imaging element holder 503 supports the imaging element sheet metal 512. An optical low pass filter 510 and an image sensor sealing member 511 described later are inserted into the image sensor holder 503 in order.

  The imaging device sealing member 511 as a second sealing member seals the gap between the imaging device holder 503 and the imaging device 516. The imaging device sealing member 511 fixes the imaging device sheet metal 512 to which the imaging device 516 and the circuit board 518 are attached to the imaging device holder 503 with the fastening screws 519 to make the space between the imaging device sheet metal 512 and the imaging device holder 503 Be held in

  The sealing member 502 seals a gap between the imaging device holder 503 and the tilt base 501. The sealing member 502 is fixed by adhering to the tilt base 501, and is pressed in the direction of the tilt base 501 by the imaging device holder 503. The sealing member 502 is an elastic material such as rubber and is formed of a light shielding material, and deforms following the tilting of the imaging device holder 503.

  A stepping motor 514 as a driving member is fixed to the tilt base 501, and a worm 513 is fixed to the motor shaft by press fitting or the like. A worm wheel is integrally provided in the imaging element holder 503 and is engaged with the worm 513. An FPC (not shown) is connected to the stepping motor 514, and the imaging element holder 503 and the imaging element 516 are tilted by rotationally driving the worm 513 by energization. The tension spring 515 is for removing the backlash between the worm 513 and the worm wheel, is attached to the tilt base 501 and the imaging device holder 503, and generates a biasing force in the tension direction.

  The initial tilt reference position of the imaging device holder 503 detects the voltage output value of the photo interrupter fixed to the tilt base 501 by a detection member integrally provided on the imaging device holder 503, and the driving pulse of the stepping motor 514 Calculated by calculating the number.

  Next, the relationship between the tilt of the image sensor holder 503 and the sealing member 502 will be described. As shown in FIG. 4B, when driving is input to the stepping motor 514 in a state where the imaging device holder 503 is orthogonal to the optical axis, the imaging device holder 503 is shown in FIG. 4C, Inclined with respect to the plane orthogonal to the optical axis. In the state of FIG. 4B, the sealing member 502 seals the gap between the imaging device holder 503 and the tilt base 501. Also in the state of FIG. 4C, the sealing member 502 is deformed to seal the gap between the imaging device holder 503 and the tilt base 501.

  Thus, the sealing member 502 seals the gap between the imaging element holder 503 and the tilt base 501 regardless of the tilt angle of the imaging element holder 503. Therefore, the entry of foreign matter into the lens barrel 4 and the imaging element unit 5 can be suppressed. In addition, since the sealing member 502 is formed of a light shielding material, it is possible to suppress unnecessary light from entering the imaging element 516 from the gap between the imaging element holder 503 and the tilt base 501.

  In the present embodiment, a stepping motor is used as the driving member, but an ultrasonic motor may be used.

  Although the sealing member 502 is bonded to the tilt base 501 in the present embodiment, it may be bonded to the image pickup device holder 503 since it may be fixed to either the tilt base 501 or the image pickup device holder 503. The configuration may be such that the tilt base 501 is pressed.

Second Embodiment
Hereinafter, with reference to FIG. 5, an imaging device according to the second embodiment will be described. FIG. 5 is a cross-sectional view of the imaging element unit 5 of the second embodiment. In the present embodiment, the basic configuration is the same as that of the first embodiment, but the shape of the sealing member 200 is different. In addition, since structures other than the sealing member 200 are the same as that of 1st Embodiment, description about the same part is abbreviate | omitted.

  The sealing member 200 seals the gap between the imaging device holder 503 and the tilt base 501. The sealing member 200 is fixed by adhering to the tilt base 501, and is pressed in the direction of the tilt base 501 by the imaging device holder 503. The sealing member 200 is an elastic material such as rubber, is formed of a light shielding material, and has a bellows shape. The sealing member 200 is deformed as the image sensor holder 503 is tilted.

  In the second embodiment, since the sealing member 200 has a bellows shape, it is possible to lighten the load of driving accompanying the deformation of the sealing member 200 when the imaging device holder 503 is tilted. Further, the sealing member 200 seals the gap between the imaging device holder 503 and the tilt base 501 regardless of the tilt angle of the imaging device holder 503. Therefore, the entry of foreign matter into the lens barrel 4 and the imaging element unit 5 can be suppressed. In addition, since the sealing member 200 is formed of a light shielding material, incidence of unnecessary light to the imaging device 516 from the gap between the imaging device holder 503 and the tilt base 501 can be suppressed.

  Although the sealing member 200 is bonded to the tilt base 501 in the present embodiment, it may be bonded to the image pickup device holder 503 since it may be fixed to either the tilt base 501 or the image pickup device holder 503. The configuration may be such that the tilt base 501 is pressed.

Third Embodiment
The imaging apparatus according to the third embodiment will be described below with reference to FIGS. 6 and 7. FIG. 6 is an exploded perspective view of a network surveillance camera (hereinafter referred to as a surveillance camera) according to the third embodiment. FIG. 7 is an exploded perspective view of the imaging device in the third embodiment. In the first and second embodiments, the dome type network camera has been described, but in the third and subsequent embodiments, the network camera in which the lens barrel can be attached to and detached from the imaging apparatus will be described. Do.

  As shown in FIG. 6, the surveillance camera includes a camera body 600 as an example of an imaging device, and a lens barrel 601 attached to the camera body 600. The lens barrel 601 is attachable to and detachable from the camera body 600.

  The camera body 600 includes a tilt base 30, an optical filter drive unit 7, an imaging device unit 60, an upper case 70, and a bottom case 80.

  The tilt base 30 as a base member has a mount portion 32 to which the lens barrel 601 can be attached. Three claws are formed in the mount portion 32, and the three claws of the mount portion 32 engage with the claws of the lens barrel 601, and the lens barrel 601 is fixed to the camera body 600. Further, the imaging element unit 60 is fixed to the tilt base 30.

  The optical filter drive unit 7 inserts the infrared cut filter 701 or the dummy glass 702 into the light path or retracts the light from the light path. The optical filter driving mechanism 7 inserts the infrared cut filter 701 on the optical path in the day mode, retracts the infrared cut filter 701 from the optical path in the night mode, and inserts the dummy glass 702 on the optical path. The filter holding frame 703 holds the infrared cut filter 701 and the dummy glass 702. The filter holding frame 703 is movably held substantially perpendicular to the optical axis by a guide bar 704 fixed to the tilt base 3. The filter holding frame 703 is restricted in rotation around the guide bar 704 by the guide bar 705 engaging with the U groove on the filter holding frame 703. The rack 707 is fixed to the filter holding frame 703 in a state of being urged in the axial direction and rotational direction perpendicular to the optical axis by a rack spring (not shown), and is engaged with the screw portion of the stepping motor 706. The rack 707 moves in a direction substantially perpendicular to the optical axis together with the filter holding frame 703 by the rotation of the screw portion.

  The upper case 70 and the bottom case 80 are configured to cover the optical filter drive unit 7 and the imaging device unit 6. The upper case 70 and the bottom case 80 have a rectangular shape, and are fastened to the tilt base 30 to form a housing of the camera body 600.

  Next, the imaging element unit 60 will be described using FIGS. 7 to 9. FIG. 8 is a perspective view of an imaging device in the third embodiment. FIG. 9A is a cross-sectional view of the imaging device in the third embodiment. FIG. 9B is a cross-sectional view of the imaging device when the imaging element in the third embodiment is rotated.

  The imaging element unit 60 includes an imaging element holder 602 and a sealing member 601.

  The image sensor holder 602 holds the image sensor 608 tiltably with respect to a plane orthogonal to the optical axis. The imaging element 608 converts an image obtained through the imaging lens into an electronic signal. The imaging device 608 is soldered to a circuit board 609 electrically connecting the imaging device 608, and is attached to the imaging device sheet metal 607 with an adhesive (not shown). An imaging element sheet metal 607 to which the imaging element 608 and the circuit board 609 are attached is attached to the imaging element holder 603 by a fastening screw 610. In addition, the image pickup device holder 603 is integrally formed with the rotation shaft 620, and the rotation shaft 620 is supported by the support portion 31 of the tilt base 30. A washer 603 is disposed on the rotating shaft 620. Further, a wave washer 604 is further disposed on one of the rotation shafts 620, and biases the image pickup device holder 603 in the direction of the rotation shaft 620. Further, an optical low pass filter holder 621 for holding the optical low pass filter 606 is inserted in the imaging element holder 603.

  The sealing member 601 seals the gap between the imaging device holder 602 and the tilt base 30. The sealing member 601 is fixed to the tilt base 30 by the fixing members 41 and 42, and is pressed in the direction of the tilt base 30 by the imaging device holder 603. The sealing member 601 is an elastic material such as rubber and is formed of a light shielding material, and deforms following the tilting of the imaging device holder 503.

  A stepping motor 612 as a driving member is fixed to the tilt base 30, and a worm 613 is fixed to the motor shaft by press fitting or the like. A worm wheel is integrally provided on the imaging element holder 602 and is engaged with the worm 613. An FPC (not shown) is connected to the stepping motor 612, and the imaging element holder 602 and the imaging element 608 are tilted by rotationally driving the worm 613 by energization. The tension spring 605 is for removing backlash between the worm 613 and the worm wheel, and is attached to the tilt base 30 and the imaging device holder 603 to generate a biasing force in the tension direction.

  The initial tilt reference position of the image pickup device holder 203 is detected by detecting a voltage output value of the photo interrupter fixed to the tilt base 30 integrally with the image pickup device holder 602, and from the detection result, the stepping motor is It calculates | requires by calculating the drive pulse number of 612. FIG.

  Next, the relationship between the tilt of the image sensor holder 602 and the sealing member 601 will be described. As shown in FIG. 9A, when driving is input to the stepping motor 612 in a state where the imaging device holder 602 is orthogonal to the optical axis, the imaging device holder 602 is shown in FIG. 9B, Inclined with respect to the plane orthogonal to the optical axis. In the state of FIG. 9A, the sealing member 601 seals the gap between the imaging device holder 602 and the tilt base 30. Also in the state of FIG. 9B, the sealing member 601 is deformed to seal the gap between the imaging device holder 602 and the tilt base 30.

  Thus, the sealing member 601 seals the gap between the imaging element holder 602 and the tilt base 30 regardless of the tilt angle of the imaging element holder 602. Therefore, it is possible to suppress the entry of foreign matter into the camera unit. Further, since the sealing member 601 is formed of a light shielding material, it is possible to suppress unnecessary light from entering the imaging device 608 from the gap between the imaging device holder 602 and the tilt base 30.

Fourth Embodiment
The imaging apparatus according to the fourth embodiment will be described below with reference to FIGS. 10 and 11.

  FIG. 10A is a cross-sectional view of the imaging device in the fourth embodiment. FIG. 10B is a cross-sectional view of the imaging device when the imaging element in the fourth embodiment is rotated. FIG. 11 is a perspective view of a state in which the cover is removed from the imaging device in the fourth embodiment. The components other than the tilt base 30 are the same as those of the third embodiment, and thus the detailed description will be omitted.

  As shown in FIG. 11, the tilt base 30 of the fourth embodiment is provided with two vents 33 as an example of a communication unit. The two vents 33 are straight grooves extending straight in the direction of the rotation axis 620 of the image sensor holder 602. Further, the two vents 33 are located above the rotation shaft 620 of the image sensor holder 602. As shown in FIG. 9, the vent 33 communicates the inside and the outside of the sealing member 601.

  When the imaging element holder 602 is rotated so that the state of FIG. 10A is changed to the state of FIG. 10B, the volume inside the sealing member 601 decreases. At this time, the air inside the sealing member 601 is discharged to the outside through the vent 33. As a result, it is possible to reduce the driving load due to the volume change of the sealing member 601 accompanying the rotation of the imaging element 608.

  The vent 33 may be provided in the sealing member 601. In addition, an air filter or an adhesive may be disposed in the vent 33. This makes it possible to suppress the entry of foreign matter.

Fifth Embodiment
The imaging apparatus according to the fifth embodiment will be described below using FIG. FIG. 12 is a perspective view of the imaging device of the fifth embodiment with the cover removed. The components other than the tilt base 30 are the same as those of the fourth embodiment, and thus the detailed description will be omitted.

  As shown in FIG. 12, the tilt base 30 of the fifth embodiment is provided with two vents 34 as an example of the communication part. The two vents 34 have bends that are bent. Also, the two vents 34 are located above the rotation axis 620 of the image sensor holder 602.

  When the image sensor holder 602 is rotated, the volume inside the sealing member 601 is reduced. At this time, the air inside the sealing member 601 is discharged to the outside through the vent 34. As a result, it is possible to reduce the driving load due to the volume change of the sealing member 601 accompanying the rotation of the imaging element 608. Further, since the vent 34 is bent, it is possible to suppress the entry of foreign matter as compared with the case where the vent 34 extends straight.

Sixth Embodiment
The imaging apparatus according to the sixth embodiment will be described below using FIG.

  FIG. 13A is a cross-sectional view of the imaging device in the sixth embodiment. FIG. 13B is a cross-sectional view of the imaging device when the imaging element in the sixth embodiment is rotated. Other than the sealing member, the third embodiment is the same as the third embodiment, and thus the detailed description is omitted.

  The sealing member 901 seals a gap between the imaging device holder 602 and the tilt base 30. The sealing member 901 is fixed to the tilt base 30 by the fixing members 41 and 42, and is pressed in the direction of the tilt base 30 by the imaging device holder 602. The sealing member 901 is an elastic material such as rubber, is formed of a light shielding material, and has a bellows shape. The sealing member 901 is deformed as the image sensor holder 602 is tilted. Further, the height of the sealing member 901 is smaller on the side of the tilt base 30 than on the side of the imaging device holder 602.

  As described above, in the sixth embodiment, since the sealing member 901 has a bellows-like shape, it is possible to reduce the driving load associated with the deformation of the sealing member 901 when the imaging device holder 602 is tilted. Further, the sealing member 901 seals the gap between the imaging element holder 602 and the tilt base 30 regardless of the tilt angle of the imaging element holder 602. Thus, the entry of foreign matter into the lens barrel and the imaging device can be suppressed. Further, since the sealing member 901 is formed of a light shielding material, it is possible to suppress unnecessary light from entering the imaging device 608 from the gap between the imaging device holder 602 and the tilt base 30.

  Furthermore, since the height of the sealing member 901 on the side of the tilt base 30 is lower than that on the side of the image pickup device holder 602, the load of driving accompanying the deformation of the sealing member 901 when the image pickup device holder 602 is tilted. It will be possible to make it lighter.

  The configuration of the present invention is not limited to those exemplified in the above embodiments, and the material, shape, size, shape, number, arrangement location, etc. may be appropriately changed without departing from the scope of the present invention. It is possible.

Reference Signs List 3 dome cover 4 lens barrel 5 image pickup unit 6 pan tilt rotation unit 8 fixed lens 9 zoom lens 10 lens moving frame 13 lens fixed frame 14 fixed lens 17 lens moving frame 18 focus lens 23 rear fixed frame 25 fixed lens 100 optical filter Drive mechanism 101 Stepping motor 102 Stepping motor 103 Gear unit 104 Gear unit 107 Infrared cut filter 108 Band pass filter 109 Filter holding frame 110 Filter holding frame 200 Sealing member 501 Tilt base 502 Sealing member 503 Image sensor holder 504 Bearing 505 Wave Washer 506 Bearing Washer 507 Bearing 508 Bearing Holder 509 Screw 510 Optical Low Pass Filter 511 Image element sealing member 512 Sensor sheet metal 513 Worm 514 Stepping motor 515 Tension spring 516 Image pickup element 517 FPC
518 Circuit board 519 fastening screw

Claims (10)

An imaging device for converting an image obtained through an imaging lens into an electronic signal;
An imaging element holder for holding the imaging element;
A base member that supports the imaging element holder so as to be able to tilt;
A driving member that tilts the imaging element holder so as to incline the imaging element with respect to a plane orthogonal to the optical axis of the imaging lens;
A sealing member for sealing between the base member and the imaging device holder;
The image pickup apparatus, wherein the sealing member deforms following the tilt of the image pickup element holder. An imaging element sheet metal holding the imaging element;
The imaging device according to claim 1, further comprising: a second sealing member that seals between the imaging element sheet metal and the imaging element holder.   The imaging device according to claim 1, wherein the sealing member is fixed to at least one of the base member and the imaging device holder.   The imaging device according to any one of claims 1 to 3, wherein the sealing member has a bellows shape.   The imaging device according to any one of claims 1 to 4, wherein the sealing member is formed of an elastic material.   The imaging device according to any one of claims 1 to 5, wherein the sealing member is formed of a light shielding material.   The imaging device according to any one of claims 1 to 6, wherein the base member includes a communication portion that communicates the inside and the outside of the sealing member.   The imaging device according to claim 7, wherein the communication portion is a linear groove.   The imaging device according to claim 7, wherein the communication portion is a groove having a bending portion.   The imaging device according to any one of claims 1 to 9, wherein the base member has a mount portion to which a lens barrel having the imaging lens can be attached and detached.

Images