Imaging device

Abstract

An imaging device is provided that can reduce the movement load of a movable member in both the optical axis direction and the direction orthogonal to the optical axis while taking heat dissipation efficiency into consideration. [Solution] The imaging device (10a) has a fixed part (13c, 29), a movable part (40a) that is held movably relative to the fixed part and has an imaging element (11), and a heat conduction member (20) that dissipates heat in a first direction (A) from the movable part toward the fixed part, and the heat conduction member has a folded part (58) that has folds arranged in the order of a first peak (52a), a first valley (57a), and a second peak (52b) from a predetermined point (50) to a first end (51a) in a second direction (B) perpendicular to the first direction, and three folds arranged in the order of a third peak (52c), a second valley (57b), and a fourth peak (52d) from the predetermined point to a second end (51b) on the opposite side of the first end.

Description

[Technical Field]

[0001] The present invention relates to an imaging device. [Background technology]

[0002] Patent Document 1 discloses a configuration in which a movable part equipped with an imaging element is movable relative to a fixed part in two axial directions perpendicular to the optical axis (directions perpendicular to the optical axis), and heat is exchanged between the fixed part and the movable part using a heat conductive member. This configuration reduces the load received from the heat conductive member when the movable part moves relative to the fixed part, without lengthening the path of the heat conductive member (while taking heat dissipation efficiency into consideration). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-189225 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if the heat conduction member disclosed in Patent Document 1 is applied to a configuration in which a movable member equipped with an imaging element can move not only in a direction perpendicular to the optical axis but also in the optical axis direction, there is a possibility that the heat conduction member will be damaged by the load applied when moving in the optical axis direction.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an imaging device that can reduce the movement load of a movable member in both the optical axis direction and the direction orthogonal to the optical axis while taking heat dissipation efficiency into consideration. [Means for solving the problem]

[0006] An imaging device according to one aspect of the present invention comprises a fixed section, a movable section held movably relative to the fixed section and having an imaging element, and a heat conduction member that dissipates heat in a first direction from the movable section toward the fixed section, wherein the heat conduction member has a folded section having folds arranged in the order of a first peak, a first valley, and a second peak from a predetermined point to a first end in a second direction perpendicular to the first direction, and three folds arranged in the order of a third peak, a second valley, and a fourth peak from the predetermined point to a second end opposite the first end.

[0007] Other objects and features of the present invention will be described in the following embodiments. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an imaging device that can reduce the movement load of a movable member in both the optical axis direction and the direction orthogonal to the optical axis while taking heat dissipation efficiency into consideration. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram of an imaging device according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the image stabilization unit and heat conduction member of the camera body according to the embodiment. [Figure 3] FIG. 2 is a development view of an expansion / contraction section in this embodiment. [Figure 4] 10A to 10C are diagrams showing the heat conducting member in the present embodiment with the expansion / contraction section folded from three directions using trigonometry. [Figure 5] FIG. 4 is a schematic diagram of a folding portion in the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0011] First, an imaging system 10 according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a schematic diagram of the imaging system 10. The imaging system 10 is a so-called mirrorless digital camera, and includes a camera body (imaging device) 10a and a lens device 10b that is detachable from the camera body 10a. However, this embodiment is not limited to this, and can also be applied to an imaging device in which the camera body and lens device are integrally configured.

[0012] Camera body 10a has imaging element 11 having imaging surface 11a, base member (fixing member) 13c, camera mount member 13a, and camera control means 14. Camera body 10a also has shake correction control means (first shake correction control section) 15a, vibration detection means (first vibration detection section) 16a, image processing means 17, and shake correction unit (first shake correction unit) 40. Lens device 10b has imaging optical system 12 including shake correction lens 12b, lens mount member 13b, shake correction control means (second shake correction control section) 15b, vibration detection section (second vibration detection section) 16b, and shake correction unit (second shake correction unit) 60.

[0013] A virtual light ray representing the light beam irradiated onto the imaging surface 11a of the imaging element 11 via the imaging optical system 12 is referred to as the optical axis (imaging optical axis) 12a. A plane perpendicular to the optical axis 12a is referred to as the optical-axis-orthogonal plane 12c, and a direction perpendicular to the optical axis 12a is referred to as the optical-axis-orthogonal direction. The optical axis 12a passes through the center of the imaging surface 11a and is perpendicular to the imaging surface 11a. To clarify the arrangement and positional relationship of each component constituting the imaging system 10 within the imaging system 10, the X, Y, and Z directions are defined as perpendicular to each other, as shown in FIG. 1 . The Z direction is parallel to the optical axis 12a, the X direction is the width direction of the imaging system 10, and the Y direction is the height direction of the imaging system 10. When both the X and Z directions are in a horizontal plane, the Y direction is vertical. Therefore, the optical-axis-orthogonal plane 12c is an XY plane.

[0014] The imaging element 11 is composed of a photoelectric conversion element such as a CMOS (Complementary Metal-Oxide-Semiconductor) image sensor or a CCD (Charge Coupled Device) image sensor. The imaging element 11 is disposed so that its imaging surface 11a faces the subject (the lens device 10b side) and is perpendicular to an optical axis 12a. The imaging element 11 generates an image signal by photoelectrically converting an optical image of the subject formed on the imaging surface 11a by the imaging optical system 12. The image signal generated by the imaging element 11 is converted into image data through various processes performed by image processing means 17 and stored in a memory (storage device) not shown.

[0015] The camera control means 14 is a calculation means within a main IC (not shown), and controls the overall operation of the imaging system 10 by receiving input operations from a user via an operation means (not shown).

[0016] The imaging optical system 12 is configured with a group of lenses (not shown) arranged inside the lens device 10b, and forms an image on the imaging surface 11a of the imaging element 11 using light reflected from a subject (not shown).

[0017] In imaging system 10, in order to position imaging element 11 with high positional accuracy relative to optical axis 12a, imaging element 11 is attached to base member 13c provided on camera body 10a, and lens device 10b is connected to base member 13c. In this case, imaging element 11 is attached to base member 13c via image stabilization unit 40. Lens device 10b is connected to base member 13c via lens mount member 13b and camera mount member 13a.

[0018] The image stabilization unit 40 corrects (reduces) image blur caused by vibrations in the imaging system 10 by moving or rotating the imaging element 11 within a plane 12c orthogonal to the optical axis 12a of the imaging optical system, thereby enabling a clear image of the subject to be obtained. Specifically, if the attitude of the imaging system 10 changes with respect to the subject during imaging, the imaging position of the subject light beam on the imaging surface 11a of the imaging element 11 changes, causing blur in the image obtained through the imaging element 11. In this case, if the change in attitude of the imaging system 10 is sufficiently small, the change in the imaging position is uniform within the imaging surface 11a and can be considered as a translational or rotational movement (image plane blur) within the plane 12c orthogonal to the optical axis.

[0019] Therefore, by translating or rotating the image sensor 11 within the plane 12c orthogonal to the optical axis so as to cancel out the image blur, a clear image of the subject with image blur corrected can be obtained. Note that when the image sensor 11 moves in a direction parallel to the imaging surface 11a, the image sensor 11 may be configured to be movable in a direction perpendicular to the imaging surface 11a.

[0020] Similarly, the image stabilization unit 60 corrects image blur caused by vibrations in the imaging system 10 by moving or rotating the image stabilization lens 12b within the plane 12c perpendicular to the optical axis, thereby enabling a clear subject image to be obtained. Specifically, the image stabilization lens 12b is moved within the plane 12c perpendicular to the optical axis to refract the optical axis 12a. At this time, the image stabilization lens 12b is moved within the plane 12c perpendicular to the optical axis so as to cancel out image blur. This allows a clear subject image with corrected image blur to be obtained. The principles of image stabilization using the image sensor 11 and the image stabilization lens 12b are well known, and therefore will not be described in detail here. The image stabilization lens 12b may also be configured to move in the optical axis direction when moving within the plane 12c perpendicular to the optical axis.

[0021] The image stabilization unit 40 has, for example, a fixed portion, a movable portion, and multiple drive force generation portions. The fixed portion is fixed to the base member 13c, and the movable portion holds the image sensor 11. The movable portion is supported by the fixed portion with three degrees of freedom, and can move or rotate relative to the fixed portion within the plane 12c orthogonal to the optical axis. In other words, the image stabilization unit 40 is configured as a drive device (a so-called XYθ stage) capable of drive control along three axes, and is capable of moving or rotating the image sensor 11 within the plane 12c orthogonal to the optical axis.

[0022] The image stabilization unit 60 has, for example, a fixed portion, a movable portion, and multiple drive force generation portions. The fixed portion is fixed to a housing (not shown) of the lens device 10b, and the movable portion holds the image stabilization lens 12b. The movable portion is supported by the fixed portion with two degrees of freedom and can move relative to the fixed portion within a plane 12c perpendicular to the optical axis. In other words, the image stabilization unit 60 is configured as a drive device (a so-called XY stage) capable of drive control along two axes, and is capable of moving the image stabilization lens 12b within the plane 12c perpendicular to the optical axis.

[0023] The vibration detection means 16a and the vibration detection means 16b are each configured with a gyro sensor or an acceleration sensor, and are shake detection means that detect angular velocity or acceleration in each direction of the imaging system 10 as shake information of the imaging system 10.

[0024] Shake correction control means 15a and shake correction control means 15b integrate the angular velocity or acceleration detected by vibration detection means 16a and vibration detection means 16b, respectively, to calculate the amount of angular change or movement in each direction of imaging system 10 as shake information. Shake correction control means 15a also calculates a target movement value for imaging element 11 based on the shake information detected by vibration detection means 16a, and controls the drive of shake correction unit 40 to control the movement of imaging element 11. Similarly, shake correction control means 15b calculates a target movement value for shake correction lens 12b based on the shake information detected by vibration detection means 16b, and controls the drive of shake correction unit 60 to control the movement of shake correction lens 12b.

[0025] In this embodiment, the imaging system 10 may include only the image stabilization unit 40. If the imaging system 10 does not include the image stabilization unit 60, the image stabilization lens 12b is basically unnecessary. In other words, the imaging optical system 12 of the lens device 10b is designed to obtain the desired optical characteristics without including the image stabilization lens 12b.

[0026] Next, the heat dissipation configuration from image sensor 11 in this embodiment will be described with reference to Fig. 2. Fig. 2 is an exploded perspective view that schematically shows the configuration of image stabilization unit 40 and heat conduction member 20 of camera body 10a.

[0027] The image stabilization unit 40 has the imaging element 11, a movable part (movable member) 40a that is driven in the plane 12c orthogonal to the optical axis, and a sensor plate (base part) 29 that holds the movable part 40a and is attached to the base member 13c.

[0028] In this embodiment, the fixed portion is composed of base member (first fixed member) 13c and sensor plate (second fixed member) 29. Movable portion 40a is movable relative to sensor plate 29 in plane 12c perpendicular to the optical axis. The distance in the optical axis direction between movable portion 40a and sensor plate 29 is maintained constant. In this embodiment, sensor plate 29 is held relative to base member 13c by screws (holding members) 23 via springs (elastic members) 22 in a state where it can move in a direction substantially parallel to optical axis 12a (the optical axis direction). With this configuration, the distance from camera mount member 13a to image stabilization unit 40 can be easily adjusted by adjusting the amount of tightening of screws 23. In other words, the distance in the optical axis direction between base member 13c and sensor plate 29 is adjustable. Meanwhile, when a large external force is applied to camera body 10a, there is a possibility that image stabilization unit 40 will move in a direction along optical axis 12a. It is preferable to configure the image stabilization unit 40 so that each component will not be damaged in this event.

[0029] The movable section 40a is configured so that the movable frame 25 is held relative to the sensor plate 29 via the rolling balls 24. This keeps the distance in the optical axis direction between the movable section 40a and the sensor plate 29 constant. The movable frame 25 holds the imaging element 11 and three coils 26.

[0030] A magnet 27 is disposed on the sensor plate 29 at a position facing the coil 26. The coil 26 and magnet 27 function as a set as a VCM (voice coil motor), and by appropriately energizing the coil 26, the movable part 40a can be moved or rotated within the plane 12c orthogonal to the optical axis.

[0031] Heat conduction member 20 is made of a sheet-like member such as a graphite sheet, and has a movable end (first end) 20a, a fixed end (second end) 20b, and an expandable portion 20c. Heat conduction member 20 is fixed to imaging element 11 at movable end 20a and to base member 13c at fixed end 20b, so that heat conduction member 20 can efficiently transfer (dissipate) heat generated by imaging element 11 to base member 13c.

[0032] The expandable section 20c of the heat conductive member 20 is formed by folding a sheet. The expandable section 20c allows the heat conductive member 20 to absorb deformation of the movable end 20a relative to the fixed end 20b along six axes. With this configuration, the heat conductive member 20 can reduce the load on the sensor plate 29 caused by the movement of the movable section 40a. Furthermore, the heat conductive member 20 does not impose a load when the image stabilization unit 40 moves relative to the base member 13c, making it possible to prevent damage to the heat conductive member 20 itself.

[0033] In this embodiment, in order to achieve more efficient heat dissipation, the movable end 20a of the heat conductive member 20 is fixed to the imaging element 11, and the fixed end 20b is fixed to the base member 13c, but this is not limited to this. For example, the movable end 20a may be fixed to a part of the movable section 40a (e.g., a location different from the imaging element 11). Alternatively, the fixed end 20b may be fixed to a part of the sensor plate 29. In other words, it is sufficient that the movable end 20a of the heat conductive member 20 is fixed to the movable section 40a, and the fixed end 20b is fixed to at least one of the base member 13c or the sensor plate 29.

[0034] When the fixed end 20b is fixed to the base member 13c, the base member 13c functions as the fixed member. On the other hand, when the fixed end 20b is fixed to the sensor plate 29, the sensor plate 29 functions as the fixed member.

[0035] Next, with reference to Fig. 3 and Figs. 4(a) to (c), an ideal folding method for the stretchable portion 20c and a method for creating degrees of freedom for the axis of the stretchable portion 20c will be described. Fig. 3 is a development view of the stretchable portion 20c. Figs. 4(a) to (c) are views showing the heat conductive member 20 from three directions using trigonometry when the stretchable portion 20c is folded.

[0036] As shown in Figure 3, heat conduction member 20 has movable end 20a at its left end and fixed end 20b at its right end, with expandable portion 20c disposed therebetween. Here, the direction from movable end 20a toward fixed end 20b is defined as heat transfer direction A (first direction), and the direction perpendicular to heat transfer direction A on the plane of heat conduction member 20 is defined as orthogonal direction B (second direction). Expandable portion 20c has first folded portions 20d, second folded portions 20e, and bellows portion (flat portion) 20f disposed between first folded portion 20d and second folded portion 20e. First folded portion 20d, bellows portion 20f, and second folded portion 20e are disposed along heat transfer direction A.

[0037] First folded portion 20d is a quadrangle (rectangle) having opposing sides that correspond to the opposing end faces C of heat conduction member 20. Two diagonal lines D of the quadrangle of first folded portion 20d are mountain fold lines, and a triangle formed by folding diagonal line D and having end face C as its base is bisected by line segment E (the line dividing the triangle) which is a valley fold line.

[0038] Second folded portion 20e is a quadrangle (rectangle) having opposing edges that are the opposing end faces C1 of heat conduction member 20. Two diagonal lines D1 of the quadrangle of second folded portion 20e are mountain folds, and a line segment E1 that bisects a triangle formed by folding diagonal line D1 and has end face C1 as its base is a valley fold. In this way, second folded portion 20e has the folds of first folded portion 20d reversed when viewed from the same side of heat conduction member 20, but has the same configuration when viewed from the back.

[0039] In bellows portion 20f, boundary line F with first folded portion 20d is a valley fold line (third valley portion) that is the same as line segment E of first folded portion 20d, and boundary line G with second folded portion 20e is a mountain fold line (fifth mountain portion). That is, a valley fold line (third valley portion) is arranged between first folded portion 20d and bellows portion 20f, and a mountain fold line (fifth mountain portion) is arranged between second folded portion 20e and bellows portion 20f. With this configuration, heat conduction member 20 has a bellows shape due to first folded portion 20d, bellows portion 20f, and second folded portion 20e.

[0040] When the expandable portion 20c is folded as described with reference to Fig. 3, the heat conduction member 20 assumes the shapes shown in Figs. 4(a) to 4(c). When the movable end 20a moves in the heat transfer direction A, in the thickness direction H perpendicular to both the heat transfer direction A and the perpendicular direction B, and in the rotation direction J as viewed from the perpendicular direction B, the opening angle of the fold of the line segment E changes, causing the entire bellows shape of the expandable portion 20c to expand and contract. This allows the movable end 20a to move with a low load.

[0041] Furthermore, when movable end 20a moves in the orthogonal direction B, in the rotational direction K as viewed from the thickness direction H, and in the rotational direction L as viewed from the heat transfer direction A, the opening angle of the fold of line segment E changes up and down, and bellows portion 20f rotates in the rotational direction L. This allows movable end 20a to move with a low load.

[0042] From the viewpoint of heat transfer efficiency, it is preferable that the length of the stretchable portion 20c in the heat transfer direction A is short and the length in the perpendicular direction B is long. Also, from the viewpoint of manufacturing man-hours, it is preferable that there are few folds. Therefore, according to this embodiment, the load on the six degrees of freedom can be reduced with a minimum number of folds. However, this embodiment is not limited to this. For example, if the number of folds is not an important factor, the number of folding portions or bellows portions may be increased, or the number of folds in the bellows portions may be increased.

[0043] In this embodiment, the heat conduction member 20 is configured to be Z-shaped when folded, but it may also be configured to be U-shaped. In that case, it is preferable to configure the two folded portions so that they have the same peak and valley when viewed from the same plane, and to have three or more folds in the bellows portion.

[0044] Next, a general definition of folding portion 58 will be described with reference to Fig. 5. Fig. 5 is a general schematic diagram of folding portion 58. Folding portion 58 corresponds to first folding portion 20d and second folding portion 20e described with reference to Fig. 3 and Figs. 4(a) to (c), and will be described with a more general shape than Fig. 3 and Figs. 4(a) to (c).

[0045] As shown in FIG. 5, folding section 58 does not need to be rectangular. Folding section 58 has two end faces (first end and second end) 51a and 51b (corresponding to end faces C and C1 in FIG. 3) located in the perpendicular direction B from vertex (predetermined point) 50 located within stretchable section 20c. End face 51b is the face opposite end face 51a in the perpendicular direction B. Folding section 58 also has mountain fold lines 52a and 52b (corresponding to diagonal lines D and D1 in FIG. 3) located from vertex 50 to end face 51a. Folding section 58 also has intersection 53a between mountain fold line 52a and end face 51a on the side closer to movable end 20a and intersection 54a on the side closer to fixed end 20b.

[0046] Similarly, mountain fold lines 52c and 52d are drawn from vertex 50 on the side of end face 51b, and their intersections are defined as intersections 53b and 54b. In this case, the line connecting intersections 53a and 53b is defined as line 55, the line connecting intersections 54a and 54b is defined as line 56, and the area surrounded by two end faces 51a and 51b and lines 55 and 56 is defined as fold-in portion 58.

[0047] Furthermore, valley fold line 57a is arranged between two mountain fold lines 52a, 52c from vertex 50 to end face 51a, and is aligned with mountain fold line 52a, valley fold line 57a, and mountain fold line 52b. Similarly, on the end face 51b side, mountain fold line 52c, valley fold line 57b, and mountain fold line 52d are arranged. With this configuration, folded portion 58 can achieve the same effects as first folded portion 20d and second folded portion 20e described with reference to FIG. 3 and FIGS. 4(a) to (c).

[0048] As described above, in this embodiment, heat conduction member 20 has folded portion 58. Folded portion 58 has three folds arranged in this order from vertex 50 to end face 51a in orthogonal direction B: mountain fold line 52a, valley fold line 57a, and mountain fold line 52b. Folded portion 58 also has three folds arranged in this order from vertex 50 to end face 51b: mountain fold line 52c, valley fold line 57b, and mountain fold line 52d.

[0049] However, this embodiment is not limited to this. For example, instead of a configuration in which a valley fold line is provided from vertex 50 to end face 51a or end face 51b, folded portion 58 of heat conduction member 20 may have a structure in which two adjacent mountain fold lines are formed to form a valley portion (recess) between the two mountain fold lines. Furthermore, while this embodiment forms two valley fold lines 57a and 57b, this is not limiting and at least one valley fold line or valley portion may be formed. That is, folded portion 58 has mountain fold lines 52a and 52b from vertex 50 to end face 51a, and mountain fold lines 52c and 52d from vertex 50 to end face 51b. Furthermore, folded portion 58 has a valley portion (corresponding to valley fold line 57a) between mountain fold line 52a and mountain fold line 52b (by forming mountain fold line 52a and mountain fold line 52b, a valley portion (recess) is formed between mountain fold lines 52a and 52b). Alternatively, folded portion 58 may have a valley portion (corresponding to valley fold line 57b) between mountain fold lines 52c and 52d, rather than between mountain fold lines 52a and 52b. Note that in this embodiment, the relationship between the mountain fold lines (mountain portions) and the valley fold lines (valley portions) may be reversed.

[0050] According to this embodiment, an imaging device can be provided that reduces the movement load of a movable member that can move not only in a direction different from the optical axis 12a (a direction perpendicular to the optical axis) but also in a direction parallel to the optical axis 12a (the optical axis direction) without lengthening the path of the heat conduction member 20 (while taking heat dissipation efficiency into consideration).

[0051] The disclosure of each embodiment includes the following configuration. (Configuration 1) A fixed portion; a movable section that is movably held relative to the fixed section and has an imaging element; a heat conduction member that dissipates heat in a first direction from the movable portion toward the fixed portion, An imaging device characterized in that the heat conduction member has a folded portion having three folds arranged in the order of a first peak, a first valley, and a second peak from a predetermined point to a first end in a second direction perpendicular to the first direction, and three folds arranged in the order of a third peak, a second valley, and a fourth peak from the predetermined point to a second end on the opposite side of the first end. (Configuration 2) 2. The imaging device according to claim 1, wherein the folding portion has a first folding portion and a second folding portion arranged along the first direction. (Configuration 3) 3. The imaging device according to claim 2, wherein the heat conducting member has a flat portion disposed between the first folded portion and the second folded portion. (Configuration 4) The imaging device according to configuration 3, wherein the heat conduction member has a bellows shape formed by the first folded portion, the flat portion, and the second folded portion. (Configuration 5) a third valley portion is formed between the first folded portion and the flat portion, The imaging device according to configuration 4, wherein a fifth peak is formed between the second folded portion and the flat portion. (Configuration 6) The fold-in portion is rectangular, the first peak, the second peak, the third peak, and the fourth peak are arranged on diagonals of the rectangle, 6. The imaging device according to any one of configurations 1 to 5, wherein the first valley and the second valley are disposed on a line dividing a triangle formed by the diagonal lines. (Configuration 7) A fixed portion; a movable section that is movably held relative to the fixed section and has an imaging element; a heat conduction member that dissipates heat from the movable portion to the fixed portion, the heat conducting member has a folded portion, The folding portion has a first peak and a second peak from a predetermined point to a first end, a third peak and a fourth peak from the predetermined point to a second end, and a first valley between the first peak and the second peak. (Configuration 8) 8. The imaging device according to configuration 7, wherein the folded portion has a second valley portion between the third peak portion and the fourth peak portion. (Configuration 9) 9. The imaging device according to any one of configurations 1 to 8, wherein the movable portion is movable in a direction perpendicular to the optical axis of the imaging optical system. (Configuration 10) the fixing portion has a first fixing member and a second fixing member, the movable portion is movable in the orthogonal direction relative to the second fixed member, The distance between the movable portion and the second fixed member in the optical axis direction is kept constant, 10. The imaging device according to configuration 9, wherein the distance between the first fixing member and the second fixing member in the optical axis direction is adjustable. (Configuration 11) The imaging device according to configuration 10, wherein the second fixing member is held by a holding member via an elastic member so as to be movable in the optical axis direction relative to the first fixing member. (Configuration 12) The imaging device described in configuration 10 or 11, characterized in that a first end of the thermal conduction member is fixed to the movable part, and a second end is fixed to at least one of the first fixed member or the second fixed member.

[0052] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0053] 10a Camera body (imaging device) 11 Image sensor 13c Base member (fixed part) 20 Thermal Conduction Material 29 Sensor plate (fixed part) 40a Moving part 50 vertices (predetermined points) 51a End face (first end) 51b End face (second end) 52a Mountain fold line (first mountain part) 52b Mountain fold line (second mountain part) 52c Mountain fold line (third mountain part) 52d Mountain fold line (4th mountain part) 57a Valley fold line (first valley) 57b Valley fold line (second valley) 58 Fold-in section A Heat transfer direction (first direction) B Orthogonal direction (second direction)

Claims

1. A fixed portion; a movable section that is movably held relative to the fixed section and has an imaging element; a heat conduction member that dissipates heat in a first direction from the movable portion toward the fixed portion, an imaging device characterized in that the thermal conduction member has a folded portion having three folds arranged in the order of a first peak, a first valley, and a second peak from a predetermined point to a first end in a second direction perpendicular to the first direction, and three folds arranged in the order of a third peak, a second valley, and a fourth peak from the predetermined point to a second end on the opposite side of the first end.

2. The imaging device according to claim 1 , wherein the folding portion includes a first folding portion and a second folding portion arranged along the first direction.

3. The imaging device according to claim 2 , wherein the heat conducting member has a flat portion disposed between the first folded portion and the second folded portion.

4. 4. The imaging device according to claim 3, wherein the heat conduction member has a bellows shape formed by the first folded portion, the flat portion, and the second folded portion.

5. a third valley portion is formed between the first folded portion and the flat portion, 5. The imaging device according to claim 4, wherein a fifth peak is formed between the second folded portion and the flat portion.

6. The fold-in portion is rectangular, the first peak, the second peak, the third peak, and the fourth peak are arranged on diagonals of the rectangle, 2. The imaging device according to claim 1, wherein the first valley and the second valley are located on a line dividing a triangle formed by the diagonal lines.

7. A fixed portion; a movable section that is movably held relative to the fixed section and has an imaging element; a heat conduction member that dissipates heat from the movable portion to the fixed portion, the heat conducting member has a folded portion, The folding portion has a first peak and a second peak from a predetermined point to a first end, a third peak and a fourth peak from the predetermined point to a second end, and a first valley between the first peak and the second peak.

8. 8. The imaging device according to claim 7, wherein the folded portion has a second valley portion between the third peak portion and the fourth peak portion.

9. 9. The imaging device according to claim 1, wherein the movable portion is movable in a direction perpendicular to an optical axis of an imaging optical system.

10. the fixing portion has a first fixing member and a second fixing member, the movable portion is movable in the orthogonal direction relative to the second fixed member, a distance between the movable portion and the second fixed member in the optical axis direction is kept constant; 10. The imaging device according to claim 9, wherein the distance between the first fixing member and the second fixing member in the optical axis direction is adjustable.

11. 11. The imaging device according to claim 10, wherein the second fixing member is held by a holding member via an elastic member so as to be movable in the optical axis direction relative to the first fixing member.

12. 11. The imaging device according to claim 10, wherein a first end of the heat conduction member is fixed to the movable portion, and a second end of the heat conduction member is fixed to at least one of the first fixed member and the second fixed member.

Images