JP7283100B2 - Imaging device - Google Patents

Description

The present invention relates to an imaging device.

In some electronic devices, metallic materials are used for exterior parts in order to achieve robustness and a sense of luxury. Digital cameras, for example, are increasingly adopting exterior parts made of magnesium alloys, which are superior in terms of strength and light weight. . If an antenna for short-range wireless communication is placed inside such a metallic exterior member, the exterior member may adversely affect communication performance, resulting in failure to achieve a desired communication distance. As a countermeasure, if a large opening is formed in the exterior member so as not to cover the antenna, there is a problem that the robustness of the exterior member is impaired. Therefore, by supporting a communication antenna on the surface of the first outer layer member and covering the outside of the antenna with a non-metallic second outer layer member, a robust structure can be obtained without providing an opening for antenna communication in the first outer layer member. It is conceivable that desired communication performance can be obtained while ensuring reliability (for example, Patent Document 1).

In addition, the present applicant combines two imaging systems of the same structure each having a wide-angle lens having an angle of view wider than 180 degrees and an imaging sensor for imaging an image by the wide-angle lens, and the image captured by each imaging system is A patent application has been filed for an omnidirectional imaging system that obtains an image within a solid angle of 4π radians by synthesizing , and patent rights have been obtained (for example, Patent Documents 2 and 3).

JP 2017-011659 A JP 2014-056048 A Japanese Patent No. 6019970

However, in the omnidirectional imaging system as described above, there is a technical problem of where and how to arrange communication antennas for transmitting and receiving acquired omnidirectional image signals and various other signals. For example, if the communication antenna is placed inside the maximum angle of view optical path of each of the two wide-angle lenses, the communication antenna will appear in the omnidirectional image (the omnidirectional image will be vignetted by the communication antenna). ) is a problem.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an imaging apparatus capable of achieving excellent image quality by suitably arranging a communication antenna.

The imaging device of the present embodiment includes a housing having a relatively high-rigidity metal housing and a relatively low-rigidity resin housing, a plurality of optical systems held in the metal housing, a communication antenna held in the resin housing, wherein the communication antenna is arranged so as not to be included in the maximum angle of view optical path of the plurality of optical systems ; and the communication antenna has a screw insertion hole. A screw insertion hole is formed in the resin housing, a screw hole is formed in the metal housing, and a screw is inserted into the screw insertion hole of the communication antenna and the screw insertion hole of the resin housing. and tightening the screw into the screw hole of the metal housing to integrate the communication antenna, the metal housing, and the resin housing.

According to the present invention, it is possible to provide an imaging apparatus capable of realizing excellent image quality by suitably arranging a communication antenna.

It is a figure which shows the external appearance structure of the imaging device by this embodiment. FIG. 2 is a left side view of a wide-angle lens system and an imaging sensor held inside a housing; 2 is a rear view of a wide-angle lens system and an imaging sensor held inside a housing; FIG. FIG. 2 is a top view of a wide-angle lens system and an imaging sensor held inside a housing; FIG. 2 is a diagram illustrating a wide-angle lens system and an imaging sensor held inside a housing in an expanded form; FIG. 4 is a diagram showing a sensor substrate and a transmission member held inside a housing; 1 is a perspective view showing the overall configuration of a wireless module board; FIG. FIG. 4 is a perspective view showing a configuration in which an upper opening of a metal housing is covered with a resin housing; 4 is a perspective view showing a connection structure between a rear metal housing and a rear resin housing; FIG. FIG. 10 is a first process diagram for assembling a communication antenna and a connection resin housing to a combined body of a front metal housing and a front resin housing; FIG. 10 is a second process diagram for assembling the communication antenna and the connection resin housing to the combined body of the front metal housing and the front resin housing; FIG. 11 is a third process diagram for assembling the communication antenna and the connecting resin housing to the combined body of the front metal housing and the front resin housing; FIG. 10 is a fourth process diagram for assembling the communication antenna and the connection resin housing to the combined body of the front metal housing and the front resin housing; FIG. 4 is a diagram showing the relationship between the maximum angle of view optical path of a wide-angle lens system and the arrangement of communication antennas;

An imaging device 1 according to the present embodiment will be described in detail with reference to FIGS. 1 to 14. FIG. The front, back, up, down, left, and right directions in the following description are based on the directions of the arrows shown in each drawing.

As shown in FIGS. 1A to 1C, the imaging device 1 has a housing 10 that holds (accommodates) the constituent elements of the imaging device 1 assembled therein. The housing 10 is short in the horizontal direction, long in the vertical direction, and has a rounded top surface. The housing 10 has a rear metal housing 20 and a front metal housing 30 . The rear metal housing 20 and the front metal housing 30 are made of a metal material (for example, a magnesium alloy) having relatively high rigidity compared to the rear resin housing 70, the front resin housing 80, and the connection resin housing 90, which will be described later. ) can be an integrally molded product.

The rear metal housing 20 and the front metal housing 30 are connected by a left side connection housing 40 , a right side connection housing 50 and a bottom connection housing 60 . The left side connection housing 40, the right side connection housing 50, and the bottom connection housing 60 can be made of the same metal material as the rear metal housing 20 and the front metal housing 30, for example. has a degree of freedom, and various design changes are possible. A positioning boss (not shown) is formed in one of the rear metal housing 20 and the front metal housing 30, and a boss insertion hole (not shown) is formed in the other of the rear metal housing 20 and the front metal housing 30. (not shown) are formed, and by inserting the positioning boss into the boss insertion hole, the rear metal housing 20 and the front metal housing 30 are positioned in a state of being close to each other. The rear metal housing 20 and the front metal housing 30 have screw holes (not shown) on the left side, the right side, and the bottom side, which overlap each other in the positioning state described above and can be tightened together. The left side connection housing 40, the right side connection housing 50, and the bottom connection housing 60 are fitted into the gaps between the left side, the right side, and the bottom between the rear side metal housing 20 and the front side metal housing 30, By screwing (tightening) common fastening screws (not shown) inserted through these into the screw holes, the rear metal housing 20, the front metal housing 30, the left side connection housing 40, and the right side connection housing are connected. 50 and the bottom connection housing 60 are integrated. The configuration for integrating the rear metal housing 20, the front metal housing 30, the left side connection housing 40, the right side connection housing 50, and the bottom connection housing 60 has a degree of freedom. Design changes are possible.

A substantially circular lens exposure hole 21 is formed above the rear metal housing 20 , and a substantially circular lens exposure hole 31 is formed above the front metal housing 30 . A shutter button 22 that serves as a trigger for imaging (still image imaging, moving image imaging) is provided slightly below the middle portion in the vertical direction of the rear metal housing 20 . That is, the shutter button 22 is arranged on the surface of the rear metal housing 20 of the housing 10 . A power button 51 for switching on/off the power of the imaging device 1 is provided in the middle part in the vertical direction of the right side connection housing 50, and below the power button 51, there are the photographing mode and the wireless connection mode. Operation buttons 52, 53, and 54 are provided for performing setting operations.

A combination of the rear metal housing 20, the front metal housing 30, the left side connection housing 40, the right side connection housing 50, and the bottom connection housing 60 constitutes a grip part GP below the middle part in the vertical direction. are doing. The photographer can press the shutter button 22, the power button 51, and the operation buttons 52 to 54 while holding the grip part GP.

A combination of the rear metal housing 20, the front metal housing 30, the left side connection housing 40, the right side connection housing 50, and the bottom connection housing 60 has an opening OS with an open top. . The opening OS is filled with the rear resin housing 70 , the front resin housing 80 , and the connection resin housing 90 . Detailed structures of the rear resin housing 70, the front resin housing 80, and the connection resin housing 90 (assembly structure for the rear metal housing 20 and the front metal housing 30) will be described in detail later.

As shown in FIGS. 2 to 4, inside the housing 10, two wide-angle lens systems (fisheye lens system, optical system, imaging optical system) A and B arranged symmetrically with each other, and two wide-angle lens systems Two imaging sensors AI and BI on which images of A and B are formed are held (accommodated, accommodated). 2 to 4, the housing 10 is schematically drawn with imaginary lines (chain lines). Each of the two wide-angle lens systems A and B and the imaging sensors AI and BI can have the same specifications. The wide-angle lens systems A and B have an angle of view wider than 180 degrees. The imaging device 1 can be an omnidirectional imaging device that obtains an image within a solid angle of 4π radians by synthesizing two images formed by the imaging sensors AI and BI.

The wide-angle lens system A includes, in order from the object side to the image side, a negative front group AF, a first prism (first optical path changing unit) AP1, a variable aperture stop AS, a second prism (second an optical path changing portion) AP2, a positive rear group AR, and a third prism (third optical path changing portion) AP3. The negative front group AF has a function of taking in light rays with a wide angle of view larger than 180°, and the positive rear group AR has a function of correcting aberrations of the formed image. The variable aperture stop AS is omitted from FIGS. 2 to 4, and is only shown in the developed view of FIG.

The negative front group AF diverges the subject light flux incident from the front and emits it rearward. The first prism AP1 reflects the subject light flux incident from the negative front group AF by 90° to the left. The variable aperture stop AS adjusts (light amount adjustment) the transmission amount of the subject light flux reflected by the first prism AP1. The second prism AP2 reflects downward 90° the subject light flux whose light amount has been adjusted by the variable aperture stop AS. The positive rear group AR emits downward while converging the subject light flux reflected by the second prism AP2. The third prism AP3 reflects the subject light flux incident from the positive rear group AR by 90 degrees to the right, and forms an image on the imaging surface of the image sensor AI. A convex surface AP3X projecting toward the imaging surface of the image sensor AI is formed on the output surface of the third prism AP3. The negative front group AF and the positive rear group AR are each composed of a plurality of lenses as shown in FIG. 5 (in FIGS. 2 to 4, AF and AR are shown as representative symbols).

The wide-angle lens system B includes, in order from the object side to the image side, a negative front group BF, a first prism (first optical path changing section) BP1, a variable aperture stop BS, and a second prism (second It has an optical path changing portion) BP2, a positive rear group BR, and a third prism (third optical path changing portion) BP3. The negative front group BF has a function of taking in light rays with a wide angle of view larger than 180°, and the positive rear group BR has a function of correcting aberration of the formed image.

The negative front group BF diverges the subject light beam incident from the rear and emits it forward. The first prism BP1 reflects the subject light flux incident from the negative front group BF by 90° to the right. A variable aperture stop BS adjusts (light amount adjustment) the transmission amount of the subject light beam reflected by the first prism BP1. The second prism BP2 reflects downward 90° the subject light flux whose light amount is adjusted by the variable aperture stop BS. The positive rear group BR emits downward while converging the subject light flux reflected by the second prism BP2. The third prism BP3 reflects the subject light flux incident from the positive rear group BR by 90° to the left to form an image on the imaging surface of the imaging sensor BI. A convex surface BP3X projecting toward the imaging surface of the imaging sensor BI is formed on the output surface of the third prism BP3. Each of the negative front group BF and the positive rear group BR is composed of a plurality of lenses as shown in FIG. 5 (BF and BR are shown as representative symbols in FIGS. 2 to 4).

The image sensors AI and BI of the wide-angle lens systems A and B have the imaging surface of the image sensor AI facing left, the imaging surface of the image sensor BI facing right, and the back of the image sensor AI and BI (the imaging surface is opposite sides) are supported back-to-back.

FIG. 5 is a diagram showing the wide-angle lens systems A and B and the imaging sensors AI and BI in development. FIG. 5 is drawn ignoring the reflection directions by the first prism AP1 to the third prism AP3 and the first prism BP1 to the third prism BP3. Therefore, the wide-angle lens systems A and B and the imaging sensors AI and BI in FIG. 5 have the same (common) configuration.

The negative front groups AF and BF have, in order from the object side, a negative meniscus lens L1 with a convex surface facing the object side, a negative meniscus lens L2 with a convex surface facing the object side, and a biconcave negative lens L3. there is

The positive rear groups AR and BR include, in order from the object side, a biconvex positive lens L4, a positive meniscus lens L5 having a convex surface facing the object side, a biconvex positive lens L6, a biconcave negative lens L7, and a biconvex lens. It has a positive lens L8, a biconcave negative lens L9, and a biconvex positive lens L10. The biconvex positive lens L6 and the biconcave negative lens L7 are cemented together. The biconvex positive lens L8 and the biconcave negative lens L9 are cemented together.

The configuration of the negative front groups AF and BF and the positive rear groups AR and BR described above is merely an example, and the configuration of the negative front groups AF and BF and the positive rear groups AR and BR may be of various designs. Change is possible. Also, the front groups AF and BF may have positive power instead of negative power, and the rear groups AR and BR may have negative power instead of positive power.

In the imaging apparatus 1 configured as described above, the negative front group AF of the wide-angle lens system A and the negative front group BF of the wide-angle lens system B are arranged oppositely in the front-rear direction and on the same (common) optical axis. be done. Also, a positive rear group AR that is bent by 90 degrees each by the first prism AP1 and the second prism AP2 and extends in the vertical direction, and a positive rear group AR that is bent by 90 degrees by the first prism BP1 and the second prism BP2 and extends in the vertical direction. , and the rear group BR of are spaced apart in the left-right direction. The positive rear group AR and the positive rear group BR extending in the vertical direction may extend parallel to each other, or may extend slightly deviated from parallel (substantially parallel). Also, the imaging sensor AI at a position bent rightward by 90° by the third prism AP3 and the imaging sensor BI at a position bent leftward by 90° by the third prism BP3 are positioned so that their imaging planes overlap. They are oriented in the left-right direction, and arranged with the surfaces opposite to the imaging surface facing back to back. In the imaging apparatus 1, the object-side lens of the negative front group AF of the wide-angle lens system A protrudes (exposes) forward from the lens exposure hole 31 of the front metal housing 30, and the negative front group BF of the wide-angle lens system B is projected (exposed) forward. The object-side lens projects (exposes) rearward from the lens exposure hole 21 of the rear metal housing 20 , and other components are housed inside the housing 10 .

That is, the wide-angle lens systems A and B have front groups AF and BF facing each other in the front-rear direction above the housing 10 and rear groups AR and BR extending downward from above the housing 10. there is Further, each of the wide-angle lens systems A and B has a first prism (first optical path changing portion) as a prism (optical path changing portion) that changes the optical path of the subject light flux that has passed through the front groups AF and BF above the housing 10 in the horizontal direction. optical path changing portions) AP1, BP1, and a second prism (second and a third prism (third optical path changing portion) AP3, BP3 for changing the optical path of the subject light flux passing through the rear groups AR and BR below the housing 10 in the horizontal direction. are doing. As a result, it is possible to arrange each component of the imaging device 1 inside the housing 10 with high layout efficiency and to achieve compactness.

The first prism AP1 of the wide-angle lens system A and the first prism BP1 of the wide-angle lens system B have a reflecting surface (optical path changing portion) common to the wide-angle lens systems A and B. That is, the first prism AP1 and the first prism BP1 share a reflecting surface with their slopes close to each other. The reflecting surfaces of the wide-angle lens systems A and B are made of a reflecting film common to the wide-angle lens systems A and B. This reflecting film is composed of two optically equivalent transparent members, a first prism AP1 and a first prism AP1. It is sandwiched between the slopes of prism BP1. In this state, the first prism AP1, the first prism BP1, and the reflective film are integrated to form a common reflective surface (optical path changing portion) for the wide-angle lens systems A and B. FIG. This makes it possible to reduce the width of the wide-angle lens systems A and B in the incident optical axis direction.

A variable aperture stop AS is arranged between the first prism AP1 and the second prism AP2 of the wide-angle lens system A, and a variable aperture stop AS is arranged between the first prism BP1 and the second prism BP2 of the wide-angle lens system B. A diaphragm BS is arranged. A first prism AP1 and a second prism AP2 are provided near (before and after) the variable aperture stop AS for light amount adjustment, and a first prism BP1 and a second prism BP2 are provided near (before and after) the variable aperture stop BS for light amount adjustment. By providing them, a small right-angle prism can be used, and the distance between the wide-angle lens systems A and B can be reduced. In addition, a symmetrical structure in which the variable aperture stop AS is the center, the first prism AP1 and the second prism AP2 are located on both sides thereof, and the negative front group AF and the positive rear group AR are located on both sides of the variable aperture stop AS, and a variable aperture stop. A symmetrical configuration can be realized with BS as the center, on both sides of which are the first prism BP1 and the second prism BP2, and on both sides of which are the negative front group BF and the positive rear group BR.

The opening degrees of the variable aperture stop AS and the variable aperture stop BS are independently adjusted based on the outputs of the image sensor AI and the image sensor BI. For example, when the imaging apparatus 1 is used outdoors, a large amount of sunlight enters only one of the wide-angle lens systems A and B, and as a result, the brightness (exposure state) of the wide-angle lens systems A and B may differ greatly. be. Combining the images from the image sensor AI and the image sensor BI in this state results in an unnatural omnidirectional image in which the boundary between the bright part and the dark part is reflected. Therefore, when a large amount of sunlight is incident only on one of the wide-angle lens systems A and B, the variable aperture stop of one of the wide-angle lens systems is narrowed down more than the variable aperture stop of the other wide-angle lens system. By adjusting the brightness (exposure state) of A and B to be uniform, it is possible to obtain a natural omnidirectional image in which there is no boundary between bright and dark portions.

The third prism AP3 of the wide-angle lens system A has a convex surface (aspherical surface) AP3X projecting toward the image sensor AI, and the third prism BP3 of the wide-angle lens system B projects toward the image sensor BI. It has a convex surface (aspherical surface) BP3X. Since the wide-angle lens systems A and B have short focal lengths, when the last surfaces of the wide-angle lens systems A and B are bent as in this embodiment, the back focal length is long despite the short focal lengths. Resulting in. In order to avoid this situation, a convex surface AP3X and a convex surface BP3X are provided to change the injection position.

The wide-angle lens systems A and B and the imaging sensors AI and BI configured as described above are integrated (blocked) as an optical unit. A screw hole (not shown) is formed in the optical unit. The optical unit was inserted into the combined body of the rear side metal housing 20, the front side metal housing 30, the left side connection housing 40, the right side connection housing 50, and the bottom surface connection housing 60 in a state of being accommodated therein. The optical unit is assembled by screwing (tightening) co-tightening screws (not shown) into the screw holes.

As shown in FIGS. 6A to 6C and FIGS. 7A to 7B, below the housing 10, a wireless module board 100 is held (accommodated, accommodated) for converting imaging signals from the imaging sensors AI and BI into wireless signals. ing. The wireless module board 100 is formed by superimposing a sub-board 101 positioned on the front side and a main board 102 positioned on the rear side in the front-rear direction and coupling them together so as to be electrically connectable. The sub-board 101 is relatively small and has a substantially rectangular shape in plan view, and the main board 102 is relatively large and has a substantially rectangular shape in plan view. A transmission member 103 is attached to the upper right portion of the main board 102, which extends upward, is bent rightward, extends further upward, and is then bent leftward. The transmission member 103 can be configured by, for example, a coaxial cable or FPC.

The transmission member 103 , one end of which is connected to the main board 102 , has the other end connected to the communication antenna 110 . The transmission member 103 transmits imaging signals from the imaging sensors AI and BI to the communication antenna 110, and the communication antenna 110 wirelessly transmits the imaging signals to an external device. Also, the communication antenna 110 can transmit and receive various signals to and from an external device.

The communication antenna 110 has an antenna main body 111 and an antenna substrate 112 holding the antenna main body 111 . The antenna main body 111 can be composed of FPC or rigid FPC, for example. The antenna board 112 is formed on the upper surface of the combination of the rear metal housing 20, the front metal housing 30, the left side connection housing 40, the right side connection housing 50, and the bottom connection housing 60. It has a curved shape (arc shape) along the shape, and the other end of the transmission member 103 is connected to the upper surface of the curved shape, and the antenna main body 111 is attached.

As shown in FIGS. 8A and 8B, the opening OS in which the communication antenna 110 is accommodated (held) is filled with the rear resin housing 70, the front resin housing 80, and the connecting resin housing 90. FIG. The rear-side resin housing 70, the front-side resin housing 80, and the connection resin housing 90 are made of a resin material (for example, PC (polycarbonate)) having relatively low rigidity compared to the rear-side metal housing 20 and the front-side metal housing 30. Alternatively, it can be an integrally molded product made of ABS resin or a mixture thereof.

The rear resin housing 70 has a curved shape that fits into the curved cutout of the opening OS formed above the rear metal housing 20 . The front resin housing 80 has a curved shape that fits into the curved cutout of the opening OS formed above the front metal housing 30 . The rear-side resin housing 70 and the front-side resin housing 80 have symmetrical shapes facing in opposite directions in the front-rear direction. The connection resin housing 90 has a curved shape that fits between the rear resin housing 70 and the front resin housing 80 in the opening OS formed above the rear metal housing 20 and the front metal housing 30. have.

As shown in FIGS. 9A and 9B, a pair of projections 23 with screw holes are formed slightly above the lens exposure hole 21 of the rear metal housing 20, and are spaced apart in the left-right direction. The body 70 is formed with a pair of screw insertion holes 71 corresponding to the pair of screw hole-provided protrusions 23 . The pair of screw hole projections 23 and the pair of screw insertion holes 71 are aligned, and the pair of tightening screws 72 are inserted through the pair of screw insertion holes 71 and into the screw holes of the pair of screw hole projections 23. By screwing (tightening), the rear metal housing 20 and the rear resin housing 70 are connected. Although the connection structure between the rear metal housing 20 and the rear resin housing 70 has been described here, the connection structure between the front metal housing 30 and the front resin housing 80 is the same.

A process of assembling the communication antenna 110 and the connection resin housing 90 to the combined body of the front metal housing 30 and the front resin housing 80 will be described with reference to FIGS.

As shown in FIG. 10, a pair of projections 32 with screw holes are formed slightly above the lens exposure hole 31 of the front metal housing 30, and are spaced apart in the left-right direction. A pair of screw insertion holes 81 corresponding to the pair of projections 32 with screw holes are formed. By aligning the pair of projections 32 with screw holes and the pair of screw insertion holes 81, the pair of tightening screws 82 are inserted through the pair of screw insertion holes 81 and screwed into the screw holes of the pair of projections 32 with screw holes. By screwing (tightening), the front metal housing 30 and the front resin housing 80 are connected. Above the front metal housing 30 and the front resin housing 80 are a plurality of bosses (not shown) that are inserted into a plurality of boss insertion holes (not shown) of the connection resin housing 90 and positioned with the connection resin housing 90 . ) are formed. There is a degree of freedom in the number, shape, arrangement, etc. of the plurality of bosses, and various design changes are possible. On both sides of the front metal housing 30 sandwiching the front resin housing 80 there are formed projections 34 with screw holes having screw holes 33 .

As shown in FIG. 11, by inserting a plurality of bosses formed above the front metal housing 30 and the front resin housing 80 into a plurality of boss insertion holes of the connecting resin housing 90, the connecting resin housing 90 can be opened. is positioned. The connecting resin housing 90 has a pair of screw insertion holes 91 spaced apart in the left-right direction (only one of the pair of screw insertion holes 91 is depicted in FIG. 11). In the positioning state of the connection resin housing 90, the pair of screw insertion holes 91 and the pair of screw holes 33 of the front metal housing 30 overlap and match.

As shown in FIG. 12, the communication antenna 110 connected to the transmission member 103 of the wireless module board 100 is incorporated above the housing 10 (the front metal housing 30, the front resin housing 80, and the connection resin housing 90). As shown in FIGS. 7A and 7B, the antenna substrate 112 of the communication antenna 110 has a pair of screw insertion holes 113 spaced apart in the horizontal direction. When the communication antenna 110 is assembled, the pair of screw holes 33 of the front metal housing 30 are fitted with the pair of screw insertion holes 91 of the connection resin housing 90 and the pair of screw insertion holes 113 of the antenna substrate 112 of the communication antenna 110 . overlaps and matches.

As shown in FIG. 13, a pair of fastening screws 120 are inserted through a pair of screw insertion holes 91 of the connecting resin housing 90 and a pair of screw insertion holes 113 of the antenna substrate 112 of the communication antenna 110 to tighten the pair of fastening screws. The screws 120 are screwed (tightened) into the pair of screw holes 33 of the front metal housing 30 . As a result, the front metal housing 30 (front resin housing 80), the connection resin housing 90, and the communication antenna 110 are integrated (see FIGS. 6A to 6B and also FIG. 8B). Although not shown, a combined body of the rear metal housing 20 and the rear resin housing 70 is assembled and fixed to the integrated member.

As described above, the imaging apparatus 1 of this embodiment has the housing 10, two wide-angle lens systems A and B held in the housing 10, and the communication antenna 110 held in the housing 10. . As shown in FIG. 14, the communication antenna 110 is arranged between the maximum angle of view optical paths of the two wide-angle lens systems A and B so as not to be included in the maximum angle of view optical paths. As a result, while maintaining the optical performance such as the resolution of the optical unit (integrated wide-angle lens systems A and B and the image sensor AI and BI) and the wide angle of view, It is possible to reliably prevent the communication antenna 110 from being reflected in the image (the photographed image is eclipsed by the communication antenna 110), and excellent image quality can be realized.

The housing 10 includes a relatively high-rigidity metal housing (the rear metal housing 20 and the front metal housing 30) and a relatively low-rigidity resin housing (the rear resin housing 70 and the front resin housing). It has a body 80 and a connection resin housing 90). By holding the optical unit (wide-angle lens systems A and B integrated with image sensors AI and BI) and the wireless module board 100 inside the metal housing, these performances are maintained, and static load and impact are maintained. (Durability can be improved). By holding the communication antenna 110 inside the resin housing, it is possible to improve the efficiency of wireless communication of captured images and the like. In other words, by forming external parts and built-in parts around the communication antenna 110 from a non-conductive resin material, the distance between the conductive member that blocks radio waves and the electronic circuit that affects the radio communication is increased from the communication antenna 110. can be picked up and placed.

The metal housing (the rear metal housing 20 and the front metal housing 30) includes a grip portion GP located below, a shutter button 22 located on the grip portion GP, and an opening portion OS located above. The resin housings (the rear resin housing 70, the front resin housing 80, and the connection resin housing 90) are arranged so as to cover (fill in) the opening OS. If the communication antenna 110 is incorporated in the grip portion GP made of a metal housing, radio waves are blocked by the photographer's hand when the photographer grips the grip portion GP to operate the shutter button 22, and wireless communication is not possible. efficiency may decrease. However, as in the present embodiment, the communication antenna 110 is built in the resin housing that covers (fills) the opening OS apart from the shutter button 22 arranged in the grip part GP, so that the photographer can press the shutter button 22. Even when the grip part GP is held for operation, the efficiency of wireless communication can be maintained at a high level.

In this embodiment, a configuration in which a communication antenna is arranged in a resin housing that covers the opening OS arranged above the imaging device 1 is described as one embodiment of the present invention. However, the communication antenna may be placed at a position where radio waves are not blocked by the photographer's hand when the photographer grips the grip part GP to operate the shutter button 22, and the efficiency of wireless communication is not lowered. Therefore, it is also possible to dispose the communication antenna in the vicinity of the bottom surface connection housing 60 in the downward direction of the imaging device 1 . In this case, the shutter button 22 provided on the grip part GP is set to a plurality of (here, two) lenses disposed closest to the object side of the front groups AF and BF of the wide-angle lens systems A and B located above. It will be placed between L1 and the communication antenna located below.

The communication antenna 110 , the front metal housing 30 and the connection resin housing 90 have a pair of screw insertion holes 113 in the antenna substrate 112 of the communication antenna 110 and a pair of screw insertion holes 91 in the connection resin housing 90 and a pair of tightening screws. 120 are inserted, and the pair of tightening screws 120 are screwed (tightened) into the pair of screw holes 33 of the front metal housing 30 to be integrated. As a result, the communication antenna 110, the front metal housing 30, and the connection resin housing 90 can be integrated with a simple configuration, and assembling efficiency can be improved.

The wide-angle lens systems A and B include front groups AF and BF facing each other in the front-rear direction above the housing 10, rear groups AR and BR extending downward from above the housing 10, and front groups AF and BF. It has an optical path changing portion (first prisms AP1, BP1 and second prisms AP2, BP2) that changes the optical path in the front-rear direction to the optical path in the vertical direction of the rear groups AR, BR. Communication antenna 110 is held by housing 10 above front groups AF and BF. Alternatively, the communication antenna 110 is held by the housing 10 on the side opposite to the rear groups AR and BR across the front groups AF and BF when viewed in the vertical direction.

In order to improve the quality of the captured image, the imaging apparatus 1 of the present embodiment is configured such that the imaging sensors AI and BI are enlarged and the prisms are reflected three times (the first prisms AP1, BP1 and the second prism AP2, BP2 and the third prism AP3). , BP3), and the number of lenses in the front groups AF and BF and the rear groups AR and BR is relatively large, resulting in an increase in the size of the optical unit. Therefore, the wireless module board 100 positioned below the optical unit has a so-called two-story structure of a sub-board 101 and a main board 102 facing each other in the front-rear direction, thereby improving the layout efficiency inside the housing 10 .

Nevertheless, where and how to dispose the communication antenna 110 remains a technical problem. The idea was reached to dispose the communication antenna 110 on the opposite side of the rear groups AR and BR across the front groups AF and BF when viewed. In particular, the communication antenna 110 is arranged above the plurality (here, two lenses) of the lenses L1 arranged closest to the object side of the front groups AF and BF of the wide-angle lens systems A and B, respectively. Further, the plurality of (here, two) lenses L1 arranged closest to the object side are arranged between the communication antenna 110 and the shutter button 22 arranged on the grip part GP. As a result, the layout efficiency is improved, and the communication antenna 110 is reliably prevented from being reflected in the photographed image (for example, the omnidirectional image) (the photographed image is eclipsed by the communication antenna 110). It is possible to obtain the effect of achieving a higher image quality. Furthermore, even when the photographer holds the grip part GP to operate the shutter button 22, the efficiency of wireless communication can be maintained at a high level.

In the above embodiment, the imaging apparatus 1 has two wide-angle lens systems A and B, but the number of wide-angle lens systems mounted in the imaging apparatus 1 is not limited to two. There may be more than one. In this case, the number of imaging sensors mounted on the imaging apparatus 1 may be matched with the number of wide-angle lens systems.

1 imaging device 10 housing 20 rear metal housing 21 lens exposure hole 22 shutter button 23 screw hole projection 30 front metal housing 31 lens exposure hole 32 screw hole projection 33 screw hole 34 screw hole projection 40 Left side connection housing 50 Right side connection housing 51 Power button 52 53 54 Operation button 60 Bottom connection housing 70 Rear side resin housing 71 Screw insertion hole 72 Tightening screw 80 Front side resin housing 81 Screw insertion hole 82 Tightening Screw 90 Connection resin housing 91 Screw insertion hole 100 Wireless module board 101 Sub board 102 Main board 103 Transmission member (coaxial cable, FPC)
110 Communication antenna 111 Antenna body (FPC, rigid FPC)
112 antenna substrate 113 screw insertion hole 120 tightening screw GP grip OS opening A wide-angle lens system (fisheye lens system, optical system, imaging optical system)
AF Front group AR Rear group AS Variable aperture stop AP1 First prism (first optical path changing unit)
AP2 second prism (second optical path changing unit)
AP3 third prism (third optical path changing part)
AP3X Convex AI Imaging sensor B Wide-angle lens system (fisheye lens system, optical system, imaging optical system)
BF Front group BR Rear group BS Variable aperture diaphragm BP1 First prism (first optical path changing unit)
BP2 second prism (second optical path changing part)
BP3 third prism (third optical path changing part)
BP3X convex BI image sensor L1 negative lens L2 negative lens L3 negative lens L4 positive lens L5 positive lens L6 positive lens L7 negative lens L8 positive lens L9 negative lens L10 positive lens

Claims (10)

a housing having a relatively high-rigidity metal housing and a relatively low-rigidity resin housing ;
a plurality of optical systems held in the metal housing;
a communication antenna held in the resin housing;
has
The communication antenna is arranged so as not to be included in the maximum angle of view optical path of the plurality of optical systems ,
A screw insertion hole is formed in the communication antenna,
A screw insertion hole is formed in the resin casing,
A screw hole is formed in the metal housing,
By inserting a screw through the screw insertion hole of the communication antenna and the screw insertion hole of the resin housing and tightening the screw into the screw hole of the metal housing, the communication antenna, the metal housing and the The resin housing is integrated,
An imaging device characterized by: The metal housing has a grip portion arranged below and an opening portion arranged above,
The resin housing is arranged to cover the opening of the metal housing,
2. The imaging device according to claim 1 , wherein: a plurality of imaging sensors on which images formed by the plurality of optical systems are formed;
a transmission member that transmits imaging signals from the plurality of imaging sensors to the communication antenna;
3. The imaging apparatus according to claim 1 , further comprising: the transmission member comprises a coaxial cable or FPC;
4. The imaging device according to claim 3 , characterized in that: The plurality of optical systems includes a front group facing in the front-rear direction above the housing, a rear group extending downward from above the housing, and an optical path extending in the front-rear direction of the front group in the rear group. and an optical path changing unit for changing the optical path in the vertical direction,
The communication antenna is held by the housing above the front group,
5. The imaging apparatus according to any one of claims 1 to 4 , characterized in that: The plurality of optical systems includes a front group facing in the front-rear direction above the housing, a rear group extending downward from above the housing, and an optical path extending in the front-rear direction of the front group in the rear group. and an optical path changing unit for changing the optical path in the vertical direction,
The communication antenna is held by the housing on the side opposite to the rear group across the front group when viewed in the vertical direction.
5. The imaging apparatus according to any one of claims 1 to 4 , characterized in that: The communication antenna has an FPC or a rigid FPC,
7. The imaging apparatus according to any one of claims 1 to 6 , characterized by: further comprising a shutter button arranged on the surface of the housing;
A plurality of lenses disposed closest to the object side of each of the plurality of optical systems are disposed between the communication antenna and the shutter button,
8. The imaging apparatus according to any one of claims 1 to 7, characterized by: The metal housing has an opening located above,
The communication antenna has a curved shape along the shape of the opening,
9. The imaging apparatus according to any one of claims 1 to 8, characterized by: Each of the plurality of optical systems has two optical systems each having an angle of view wider than 180 degrees,
As the plurality of imaging sensors, two imaging sensors on which the images formed by the two optical systems are formed,
The communication antenna is arranged so as not to be included in the maximum angle of view optical path of the two optical systems.
4. The imaging device according to claim 3 , characterized in that:

Images