Imaging apparatus

Abstract

To provide an imaging apparatus that improves operability in attaching and detaching a lens to and from a camera body part even when the imaging apparatus has a plurality of camera body parts.SOLUTION: An imaging apparatus comprises a plurality of camera body parts. The camera body parts each have a lens, a lens adapter to which the lens is fixed, an imaging part that is engaged with the lens adapter and has an image pick-up device arranged therein, and a base part that has a hole part in at least part thereof. The lens adapter has an operating part for performing operations to attach and detach the lens adapter to and from the imaging part. The lens and the lens adapter and the imaging part are arranged inside the base part. The operating part of the lens adapter is partially exposed from the hole part in the base part.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] Surveillance cameras are used in office buildings, shops, city streets, etc. for crime prevention and disaster prevention purposes. Users select and install cameras according to their intended use. Fixed surveillance cameras are often installed when the area to be monitored is fixed, such as the entrance to a building or a passageway. On the other hand, omnidirectional cameras equipped with fisheye lenses may be installed when a bird's-eye view of all directions is required. Furthermore, in recent years, there have been an increasing number of cases where a multi-lens camera, which houses multiple imaging means (camera body parts) in a single camera, is used to monitor higher quality images without blind spots. Furthermore, by changing the lenses of the imaging means, users can monitor at telephoto or wide-angle, and the needs for surveillance cameras are becoming more diverse.

[0003] Patent Document 1 discloses a method of fixing a lens to a camera body by providing a spacer between the lens and the camera body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-167207 A Summary of the Invention [Problem to be solved by the invention]

[0005] Here, in the configuration of Patent Document 1, the spacer does not have a mechanism or function such as an operable operation unit, and there is a problem that operability is poor when the user attaches and detaches the lens (lens replacement).

[0006] In view of such circumstances, an object of the present invention is to provide an imaging device having a plurality of camera body parts, which improves the operability of attaching and detaching lenses of each camera body part.

Means for Solving the Problems

[0007] In order to achieve the above object, an imaging device according to one aspect of the present invention is an imaging device including a plurality of camera body parts, wherein the camera body part includes a lens, a lens adapter to which the lens is fixed, an imaging part that engages with the lens adapter and in which an imaging element is arranged, and a base part having a hole part in at least a part thereof. The lens adapter has an operation part for performing an attachment / detachment operation between the lens adapter and the imaging part. The lens, the lens adapter, and the imaging part are arranged within the base part, and a part of the operation part of the lens adapter is exposed from the hole part of the base part.

Effects of the Invention

[0008] According to the present invention, it is possible to provide an imaging device having a plurality of camera body parts, which improves the operability of attaching and detaching lenses of each camera body part.

Brief Description of the Drawings

[0009] [Figure 1] It is a perspective view of an imaging device according to Embodiment 1. [Diagram 2] It is a perspective view of a state in which a dome is removed from the imaging device according to Embodiment 1. [Diagram 3] It is a perspective view of a camera body part according to Embodiment 1. [Figure 4] It is a perspective view of a state in which a camera base is removed from the camera body part according to Embodiment 1 and the camera body part. [Diagram 5] It is an exploded perspective view of a lens and a lens adapter of a camera body part according to Embodiment 1. [Figure 6] It is an exploded perspective view of a state in which a lens of a camera body part according to Embodiment 1 is attached to a lens adapter. [Figure 7] 5A to 5C are diagrams illustrating the operations of elements of the lens adapter and the imaging unit when the lens adapter according to the first embodiment is attached to the imaging unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiment for carrying out the present invention will be described in detail with reference to the attached drawings. The embodiment described below is one example of a means for realizing the present invention, and should be appropriately modified or changed depending on the configuration of the device to which the present invention is applied and various conditions, and the present invention is not limited to the following embodiment.

[0011] <Embodiment 1> The configuration of the imaging device 1 will be described below with reference to Fig. 1. Fig. 1 is an example of a perspective view of the imaging device 1 in this embodiment. The exterior (exterior member) of the imaging device 1 includes a bottom cover (first cover) 20, a top cover (second cover) 30, and a dome (third cover) 10 for mounting the imaging device 1 to an installation surface such as a ceiling or a floor.

[0012] The dome 10 is made of a transparent or semi-transparent material made of, for example, polycarbonate. The dome 10 is fixed to the top cover 30 with screws (not shown). The dome 10 is configured in a hemispherical shape. The dome 10 does not have to be a perfect hemisphere, and may have a partially spherical surface. Alternatively, the dome 10 may be made of a polyhedron. A rubber packing (not shown) is disposed on the contact surface between the dome 10 and the top cover 30. The bottom cover 20 is fixed to the top cover 30 with screws (not shown). A rubber packing (not shown) is disposed between the bottom cover 20 and the top cover 30.

[0013] In this embodiment, the bottom cover 20 and the top cover 30 together form a housing. Inside the exterior members (bottom cover 20, top cover 30, dome 10), various components including a plurality of camera main bodies 50 described later are arranged. The exterior members also function as protective members (protective covers) that protect the various components including a plurality of camera main bodies 50 described later from raindrops, dust, external impacts, and the like.

[0014] FIG. 2 is an example of a perspective view showing a state in which the dome 10 is removed from the imaging device 1 in this embodiment. A rail portion 40 and multiple camera body portions 50 are provided inside the dome 10. Here, the rail portion 40 is annular in shape and has a gear portion 41 (first gear portion) around the entire circumference. That is, the gear portion 41 is also annular in shape. The multiple camera body portions 50 in this embodiment are configured to be independently movable on the rail portion 40. Four camera body portions 50 are shown in FIG. 2. However, this is an example and the number of camera body portions 50 is not limited to four, and any other number may be used as long as it is multiple.

[0015] Fig. 3 is an example of a perspective view of the camera body 50. Fig. 3(A), Fig. 3(B), and Fig. 3(C) are views of the camera body 50 viewed from different directions.

[0016] The camera body 50 is composed of a camera base 51, a lens (interchangeable lens) 52, a lens adapter 53, and an imaging unit 54. The camera base 51 has a wall 511, a hole 512, and a gear (second gear) 513. Here, the lens 52, the lens adapter 53, and the imaging unit 54 are arranged on the wall 511 side of the camera base 51 so as to be covered by the camera base 51. That is, the lens 52, the lens adapter 53, and the imaging unit 54 are arranged inside the camera base. The gears 513 of each camera base 51 mesh with the gears 41 of the rail 40, and the multiple camera body 50 can be moved independently (pan driven) on the rail 40 electrically by a drive mechanism composed of a motor (not shown). That is, the camera body 50 can be rotated on the rail 40 by a drive mechanism (not shown). The drive mechanism is provided in the camera base 51, for example. Furthermore, the camera base unit 51 has a fixing unit (not shown) that fixes the imaging unit 54. The fixing unit makes it possible to remove the lens adapter 53 from the imaging unit 54 by operating the operation unit 533 while the imaging unit 54 is placed inside the camera base unit 51.

[0017] Fig. 4 is an example of a perspective view of the camera body 50 according to this embodiment. Fig. 4(A) is an example of a perspective view when the camera base 51 is removed from the camera body 50. Figs. 4(B) and 4(C) are examples of exploded perspective views of Fig. 4(A). Fig. 5 is an exploded perspective view of the lens 52 and the lens adapter 53 of the camera body 50 according to this embodiment. Figs. 5(A) and 5(B) are examples of exploded perspective views of only the lens 52 and the lens adapter 53 as viewed from different directions.

[0018] A biasing member 55 is provided between the lens adapter 53 and the imaging unit 54. An imaging element 56 and a board 57 are disposed in the imaging unit 54. The imaging element 56 has a semiconductor element such as a CCD (Charge Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor. The imaging element 56 is fixed to the board 57 by a fixing means such as an adhesive. The board 57 with the imaging element 56 attached is fixed to the imaging unit 54 by a screw (not shown) or the like. In this way, the imaging element 56 and the board 57 are fixed to the imaging unit 54.

[0019] The lens 52 has a male thread portion (fourth engagement portion) 521 and a lens side abutment surface 522. The lens side abutment surface 522 is a surface provided on the lens 52 and abuts against the lens adapter. The lens adapter 53 has a female thread portion (third engagement portion) 531, a lens adapter side abutment surface 532, an operation portion 533, a first engagement portion 534, a recess 535, and a first abutment surface 536. The lens adapter side abutment surface 532 is a surface provided on the lens adapter 53 and abuts against the lens 52.

[0020] The lens adapter 53 and the operation section 533 of the lens adapter 53 are configured to have a circular ring shape. Note that it is sufficient that at least a portion of the lens adapter 53 and the operation section 533 is formed in a circular ring shape.

[0021] The operation unit 533 of the lens adapter 53 can be used to perform operations for attaching and detaching the lens 52 and the lens adapter 53, and for attaching and detaching the lens adapter 53 and the imaging unit 54, which will be described later. Specifically, the user can hold the operation unit 533 and operate the operation unit 533 to attach and detach the lens 52 and the lens adapter 53, and for attaching and detaching the lens adapter 53 and the imaging unit 54. The operations for attaching and detaching the lens 52 and the lens adapter 53, and for attaching and detaching the lens adapter 53 and the imaging unit 54 will be described later. The operation unit 533 is formed so as to protrude outward in the radial direction beyond the outer peripheries of the lens 52 and the imaging unit 54.

[0022] The lens 52 can be attached to the lens adapter 53 by engaging the fourth engagement portion of the lens 52 with the third engagement portion of the lens adapter 53. Specifically, the lens 52 can be fixed to the lens adapter 53 by screwing the male thread portion 521 of the lens 52 into the female thread portion 531 of the lens adapter 53. When the lens 52 is fixed to the lens adapter 53, the lens side abutment surface 522 of the lens 52 and the lens adapter side abutment surface 532 of the lens adapter 53 abut against each other.

[0023] The urging member 55 is disposed in a recess 535 of the lens adapter 53. Here, the urging member 55 suppresses deviation of the distance (flange back) from the imaging element 56 of the imaging unit 54 to the lens side abutment surface 522 (lens mount surface) of the lens 52, and in addition, prevents rattling of the lens 52. The urging member 55 is annular, and is made of a rubber material such as an O-ring or a spring member. In this embodiment, the urging member 55 is disposed on the lens adapter 53 side, but is not limited thereto. For example, a recess (groove) similar to the recess 535 may be provided on the imaging unit 54 side, and the urging member 55 may be disposed in the groove.

[0024] Fig. 6 is an exploded perspective view of the lens 52 of the camera body 50 according to this embodiment attached to the lens adapter 53. Fig. 6(A) and Fig. 6(B) are examples of exploded perspective views of the lens 52 in Fig. 4(A) fixed to the lens adapter 53, as viewed from different directions.

[0025] The imaging unit 54 also has a second contact surface 541 and a second engagement portion 542. The imaging element 56 and the board 57 are fixed in a state in which their tilt directions are adjusted relative to the second contact surface 541. Here, the first engagement portion 534 of the lens adapter 53 engages with the second engagement portion 542 of the imaging unit 54. In this embodiment, the first engagement portion 534 has a concave shape, and the second engagement portion 542 has a convex shape.

[0026] The first engagement portion 534 of the lens adapter 53 engages with the second engagement portion 542 of the imaging unit 54, which has a different shape from the first engagement portion 534. By engaging the first engagement portion 534 with the second engagement portion 542, the imaging unit 54 can be attached to the lens adapter 53. Then, in a state in which the first engagement portion 534 and the second engagement portion 542 are engaged (fixed), the first abutment surface 536 of the lens adapter 53 and the second abutment surface 541 of the imaging unit 54 abut against each other.

[0027] The first engagement portion 534 of the lens adapter 53 is provided in the lens adapter 53 in a positional relationship corresponding to the second engagement portion 542 of the imaging unit 54. In this embodiment, the first engagement portion 534 of the lens adapter 53 and the second engagement portion 542 of the imaging unit 54 are provided in four locations. In this manner, the same number of second engagement portions 542 and first engagement portions 534 are provided in the lens adapter 53 and the imaging unit 54. That is, the number of first engagement portions 534 corresponding to the number of second engagement portions 542 is provided in the lens adapter 53, and the number of second engagement portions 542 corresponding to the number of first engagement portions 534 is provided in the imaging unit 54. Here, the number of first engagement portions 534 and second engagement portions 542 is not limited to four, and may be provided in a plurality of locations.

[0028] In addition, in this embodiment, the first engagement portion 534 of the lens adapter 53 has a concave shape and the second engagement portion 542 of the imaging portion 54 has a convex shape, but the first engagement portion 534 may have a convex shape and the second engagement portion 542 may have a concave shape. That is, either the first engagement portion 534 or the second engagement portion 542 may have a concave shape and the other may have a convex shape.

[0029] 7 is a diagram showing the operation of elements of the lens adapter 53 and the imaging unit 54 when the lens adapter 53 according to this embodiment is attached to the imaging unit 54. Fig. 7(A), Fig. 7(B), and Fig. 7(C) are diagrams sequentially showing the state when the first engagement portion 534 of the lens adapter 53 engages with the second engagement portion 542 of the imaging unit 54 in a state in which the lens 52 is fixed to the lens adapter 53. Here, for simplification, Figs. 7(A) to 7(C) show only the second engagement portion 542 of the imaging unit 54.

[0030] 7(A) to 7(C), the first engagement portion 534 of the lens adapter 53 is an L-shaped groove portion composed of an introduction portion 534a and a fixing portion 534b. Thus, in this embodiment, the first engagement portion 534 is an L-shaped groove portion, and the second engagement portion 542 is a convex portion that engages with the groove portion. Note that the second engagement portion 542 may be an L-shaped groove portion, and the first engagement portion 534 may be a convex portion that engages with the groove portion.

[0031] 7(A) to 7(C), a method for fixing and detaching the lens adapter 53 to and from the imaging unit 54 will be described below. Note that, although a method for fixing and detaching the lens adapter 53 to and from the imaging unit 54 in a state where the lens 52 is fixed to the lens adapter 53 will be described below, the same method can also be used in a state where the lens 52 is not fixed to the lens adapter 53.

[0032] First, the user visually aligns the first engagement portion 534 of the lens adapter 53 to which the lens 52 is fixed and the second engagement portion 542 of the imaging unit 54. Next, when the lens adapter 53 is moved in the optical axis direction of the lens 52 (the direction of the arrow P shown in FIG. 7), the second engagement portion 542 is inserted into the introduction portion 534a of the first engagement portion 534 as shown in FIG. 7(A).

[0033] Next, when the lens adapter 53 is moved in a direction along the optical axis of the lens 52 (the direction of arrow P shown in Figure 7), the second engagement portion 542 further engages with the introduction portion 534a of the first engagement portion 534 as shown in Figure 7 (B).

[0034] Next, from that state, when the lens adapter 53 is rotated in the direction of the arrow R shown in Fig. 7(C) (rotating around the optical axis), the second engagement portion 542 moves to the fixing portion 534b of the first engagement portion 534, and the first engagement portion 534 engages with the second engagement portion 542. This makes it possible to fix the lens adapter 53 with the lens 52 fixed thereto to the imaging portion 54.

[0035] When removing the lens adapter 53 to which the lens 52 is fixed as shown in Fig. 7, the lens adapter 53 is rotated in the direction opposite to the arrow R from the state in which the lens adapter 53 is fixed to the imaging unit 54 shown in Fig. 7(C). As the lens adapter 53 continues to rotate in the direction opposite to the arrow R, the second engagement portion 542 of the imaging unit 54 gradually moves between the fixing portion 534b and the introduction portion 534a of the first engagement portion 534. This state is the state shown in Fig. 7(B).

[0036] Furthermore, when the lens adapter 53 is moved from this state in the opposite direction to the arrow P, the second engagement portion 542 of the imaging unit 54 moves to the end of the introduction portion 534a of the first engagement portion 534. This state is the state shown in FIG. 7(A). This makes it possible to remove the lens adapter 53 to which the lens 52 is fixed, from the imaging unit 54. In other words, the lens 52 can be removed from the imaging unit 54. At this time, the imaging unit 54 remains fixed to the camera base portion 51.

[0037] Here, when it is desired to attach a lens different from the lens 52 (another lens) to the imaging unit 54, first, the lens 52 is removed from the lens adapter 53. That is, the male thread portion 521 of the lens 52 is removed from the female thread portion 531 of the lens adapter 53. Then, the lens to be attached to the lens adapter 53 is fixed to the lens adapter 53 in the same manner as described above. This allows the other lens to be fixed to the lens adapter 53 in the same manner as the lens 52.

[0038] 7(A) to 7(C), the lens adapter 53 and the imaging unit 54 can be attached and detached in the same manner. Note that, in this embodiment, the first engagement portion 534 has an L-shape, but the shape is not limited thereto and may be any shape that can firmly fix the imaging unit 54 to the lens adapter 53.

[0039] In addition, in this embodiment, the positions of the lens adapter 53 and the imaging unit 54 are determined visually, but for example, a separate positioning device or index may be provided and the user may use the separate index as a guide to determine the position.

[0040] In this embodiment, the user can perform the series of operations shown in Figures 7(A) to 7(C) by grasping the operating portion 533 of the lens adapter 53 and performing a moving operation to move it straight along the optical axis direction and a rotating operation to rotate it around the optical axis.

[0041] That is, by using the operation unit 533 to move in a straight line in the optical axis direction and to rotate around the optical axis, the second engagement part 542 can be engaged with the first engagement part 534, and the lens adapter 53 can be fixed to the imaging unit 54. On the other hand, by using the operation unit 533 to move in a straight line in the optical axis direction and to rotate around the optical axis, the second engagement part 542 can be removed from the first engagement part 534, and the lens adapter 53 can be removed from the imaging unit 54. This allows the user to attach and detach the lens adapter 53 and the imaging unit 54 by grasping and operating the operation unit 533. Furthermore, the user can attach and detach the lens adapter 53 and the lens 52 by using the operation unit 533 to rotate around the optical axis.

[0042] 3(B), a part of the operation unit 533 of the lens adapter 53 is exposed from a hole 512 provided in at least a part (one location) of the camera base unit 51. When the camera body unit 50 is on the rail unit 40 (on the rail) or when the gear unit 41 and the gear unit 513 are engaged with each other, the user can grasp the operation unit 533 of the lens adapter 53 from this hole 512. Note that the number of holes 512 is not limited to one, and multiple holes may be formed in the camera base unit 51, for example, on the side surface unit 511 side as well.

[0043] As described above, in the imaging device 1 of this embodiment shown in Fig. 2, the camera body 50 moves (rotates) on the rail 40. No matter what position the camera body 50 is in (even if a plurality of camera body parts 50 are adjacent to each other), the user can grasp the operation part 533 through the hole 512 of the camera base part 51. Even in this state, the user can attach and detach the lens adapter 53 and the imaging part 54 by grasping the operation part 533 through the hole 512 of the camera base part 51 and operating the operation part 533. Note that even when the lens 52 is fixed to the lens adapter 53, the imaging part 54 can be attached and detached in the same manner as described above.

[0044] In the imaging device 1 of the present embodiment, as described above, the lens 52, the lens adapter 53, and the imaging unit 54 can be attached and detached simply by operating the operation unit 533 of the lens adapter 53. Also, for example, a cable (not shown) of the imaging unit 54 may be passed through the hole 512 of the camera base unit 51. Here, it is desirable that the lens adapter 53 has a shape that allows the flange back of the lens 52 to be attached, i.e., the distance from the imaging unit 54 to the lens side abutment surface 522 (lens mount surface) of the lens 52, to be adjusted.

[0045] Further, it is desirable that the first contact surface 536 of the lens adapter 53 and the second contact surface 541 of the imaging unit 54 each have a small surface roughness. By aligning the female screw portion 531 of the lens adapter 53 with the lens mount portion of the lens that the user wants to attach, it becomes possible to attach lenses with different mounts to the imaging unit 54. Also, by using a lens adapter 53 having a bayonet mount lens and a corresponding shape, the bayonet mount lens may be attached to the imaging unit 54.

[0046] As described above, the preferred embodiments of the present invention have been described using examples and figures. However, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist thereof.

[0047] The disclosure of this embodiment includes the following configurations.

[0048] (Configuration 1) An imaging device including a plurality of camera body parts, wherein the camera body part includes a lens, a lens adapter to which the lens is fixed, an imaging unit that engages with the lens adapter and in which an image sensor is disposed, and a base part having a hole part in at least a part thereof. The lens adapter has an operation part for performing an attachment / detachment operation between the lens adapter and the imaging unit. The lens, the lens adapter, and the imaging unit are disposed within the base part. A part of the operation part of the lens adapter is exposed from the hole part of the base part. An imaging device characterized by the above.

[0049] (Configuration 2) The lens adapter has a first engaging part. The imaging unit has a second engaging part having a shape different from that of the first engaging part. The imaging device according to Configuration 1, characterized in that the lens adapter is fixed to the imaging unit by engaging the first engaging part with the second engaging part.

[0050] (Configuration 3) 3. The imaging device according to configuration 2, wherein one of the first engagement portion and the second engagement portion is concave and the other is convex.

[0051] (Configuration 4) The first engagement portion is an L-shaped groove, 4. The imaging device according to configuration 2 or 3, wherein the second engagement portion is a protrusion that engages with the groove.

[0052] (Configuration 5) The lens adapter has a third engagement portion, the lens has a fourth engagement portion having a shape different from that of the third engagement portion, 5. The imaging device according to any one of configurations 1 to 4, wherein the lens is fixed to the lens adapter by engaging the third engagement portion with the fourth engagement portion.

[0053] (Configuration 6) The third engagement portion is a female thread portion that is attached to the fourth engagement portion that is a male thread portion, The imaging device according to configuration 5, wherein the lens is fixed to the lens adapter by screwing the male threaded portion into the female threaded portion.

[0054] (Configuration 7) 7. The imaging device according to any one of configurations 1 to 6, wherein at least a portion of the operation portion is formed in a circular ring shape and protrudes radially outward beyond an outer periphery of the lens.

[0055] (Configuration 8) 8. The imaging device according to any one of configurations 1 to 7, wherein at least a portion of the operation section is formed in a circular ring shape and protrudes radially outward beyond an outer periphery of the imaging section.

[0056] (Configuration 9) The imaging device according to any one of configurations 2 to 4, characterized in that the second engagement portion is engaged with the first engagement portion by moving the operation portion in the optical axis direction and rotating it around the optical axis.

[0057] (Configuration 10) The imaging device described in any one of configurations 1 to 9, characterized in that the lens adapter and the imaging unit are attached and detached by operating a portion of the operation unit exposed from the hole portion while the camera body is on a circular rail.

[0058] (Configuration 11) A circular rail, A first gear portion provided on the rail; a second gear portion formed on the base portion so as to mesh with the first gear portion, The imaging device described in any one of configurations 1 to 10, characterized in that the lens adapter and the imaging unit are attached and detached by operating a portion of the operating unit exposed from the hole portion while the first gear portion and the second gear portion are engaged.

[0059] (Configuration 12) 12. The imaging device according to any one of configurations 1 to 11, further comprising a biasing member disposed in either the lens adapter or the imaging unit.

[0060] (Configuration 13) 13. The imaging device according to configuration 12, wherein the biasing member is annular.

[0061] (Configuration 14) 14. The imaging device according to claim 12, wherein the biasing member is an O-ring or a spring member.

[0062] (Configuration 15) 15. The imaging device according to any one of configurations 1 to 14, wherein the lens adapter is annular.

[0063] (Configuration 16) the lens adapter has a plurality of the first engagement portions, 5. The imaging device according to any one of configurations 2 to 4, wherein the imaging section has second engagement portions whose number corresponds to the number of the first engagement portions of the lens adapter.

[0064] (Configuration 17) an exterior member including a first cover for fixing the imaging device to an installation surface, a second cover fixed to the first cover, and a third cover fixed to the second cover and having at least a partially spherical surface; 17. The imaging device according to any one of configurations 1 to 16, wherein the plurality of camera bodies are protected by the exterior member. [Explanation of symbols]

[0065] 1. Imaging device 50 Camera body 51 Camera base 512 Hole 52 Lens 521 Male thread 522 Lens side contact surface 53 Lens adapter 531 Female thread 532 Lens adapter contact surface 533 Operation section 534 First engagement portion 535 Recess 536 First contact surface 54 Imaging unit 541 Second abutment surface 542 Second engagement portion 55 Pressing member 56 Image sensor 57 Substrate

Claims

1. An imaging device including a plurality of camera bodies, the camera body includes a lens, a lens adapter to which the lens is fixed, an imaging unit that engages with the lens adapter and in which an imaging element is disposed, and a base unit having a hole at least in a portion thereof; the lens adapter has an operation unit for performing an operation of attaching and detaching the lens adapter to and from the imaging unit, the lens, the lens adapter, and the imaging unit are disposed within the base unit; A part of the operation portion of the lens adapter is exposed from the hole of the base portion.

1. An imaging device comprising:

2. The lens adapter has a first engagement portion, the imaging unit has a second engagement portion having a different shape from the first engagement portion, The imaging device according to claim 1 , wherein the lens adapter is fixed to the imaging unit by engaging the second engaging portion with the first engaging portion.

3. 3. The imaging device according to claim 2, wherein one of the first engaging portion and the second engaging portion is concave, and the other is convex.

4. The first engagement portion is an L-shaped groove portion, 3. The imaging device according to claim 2, wherein the second engagement portion is a protrusion that engages with the groove.

5. The lens adapter has a third engagement portion, the lens has a fourth engagement portion having a shape different from that of the third engagement portion, 2 . The imaging device according to claim 1 , wherein the lens is fixed to the lens adapter by engaging the third engaging portion with the fourth engaging portion.

6. The third engagement portion is a female thread portion that is attached to the fourth engagement portion that is a male thread portion, 6. The imaging device according to claim 5, wherein the lens is fixed to the lens adapter by screwing the male threaded portion into the female threaded portion.

7. The imaging device according to claim 1 , wherein at least a portion of the operation portion is formed in an annular shape and protrudes radially outward beyond an outer periphery of the lens.

8. The imaging device according to claim 1 , wherein the operation section is at least partially formed in an annular shape and protrudes radially outward beyond an outer periphery of the imaging section.

9. 3. The imaging device according to claim 2, wherein the second engagement portion is engaged with the first engagement portion by moving the operation portion in the optical axis direction and rotating it around the optical axis.

10. The imaging device according to claim 1, characterized in that the lens adapter and the imaging unit are attached and detached by operating a portion of the operating unit exposed from the hole portion while the camera body is on a circular rail.

11. A circular rail, A first gear portion provided on the rail; a second gear portion formed on the base portion so as to mesh with the first gear portion, The imaging device according to claim 1, characterized in that the lens adapter and the imaging unit are attached and detached by operating a portion of the operating unit exposed from the hole portion while the first gear portion and the second gear portion are engaged with each other.

12. The imaging device according to claim 1 , further comprising a biasing member disposed in either the lens adapter or the imaging unit.

13. The imaging device according to claim 12, wherein the biasing member is annular.

14. 13. The image pickup apparatus according to claim 12, wherein the biasing member is an O-ring or a spring member.

15. The imaging device according to claim 1 , wherein the lens adapter is annular.

16. the lens adapter has a plurality of the first engagement portions, 3. The image pickup device according to claim 2, wherein the image pickup section has second engagement portions the number of which corresponds to the number of the first engagement portions of the lens adapter.

17. an exterior member including a first cover for fixing the imaging device to an installation surface, a second cover fixed to the first cover, and a third cover fixed to the second cover and having at least a partially spherical surface; 2. The imaging device according to claim 1, wherein the plurality of camera bodies are protected by the exterior member.

Images