JP2021047327A - Mount device and imaging device - Google Patents

Abstract

To provide a mount device that enables a mount face of an accessory to be attached firmly to a mount face of an imaging device main body without impairing a relative revolution operation between the accessory and the imaging device main body.SOLUTION: A mount device 1010, which is attachable to an imaging device main body 1000, has: a mount member 1040 that can attach/detach an accessory, and includes a second mount face abutting on a first mount face of the accessory; a movable member 1020 that, in a case of a side where the mount member 1040 is provided being a front side in the mount device 1010, has one part located on a rear face side of the mount member 1040, and is movable in a center axis direction of the mount member 1040; and a spring 1014 that urges the movable member 1020 to a mount member 1040 side in the center axis direction. When the accessory is mounted to the mount device 1010, the movable member 1020 has a second pawl part 1021 that, in the center axis direction, engages with a first pawl part provided in the accessory.SELECTED DRAWING: Figure 3

Description

The present invention relates to a mounting device provided with a mounting member to which an accessory can be attached and detached, and an imaging device provided with the mounting device.

As an image pickup device with a built-in image pickup element, an image pickup device that can be attached by appropriately exchanging accessories such as interchangeable lenses such as a single focus lens, a zoom lens, a wide-angle lens, a telephoto lens, and a macro lens depending on the situation. It has been known. An image pickup device to which such an accessory can be attached and detached is generally referred to as an image pickup device with an interchangeable lens. The so-called bayonet coupling method is widely adopted as a method for attaching and detaching accessories to such an interchangeable lens type imaging device. Hereinafter, the case where the accessory is an interchangeable lens will be described.

The contact surface between the image pickup device main body and the interchangeable lens is called a mount surface, and the mount surface of the image pickup device main body and the mount surface of the interchangeable lens come into contact with each other. The distance from the mount surface of the image pickup device to the image sensor is adjusted to a predetermined value, and the arrangement position of the lens group built in the interchangeable lens is adjusted with reference to the mount surface of the interchangeable lens. There is. As a result, by bringing the mount surfaces into close contact with each other, the lens group in the interchangeable lens is configured to be in focus on the surface of the image sensor in any interchangeable lens, and high-resolution shooting becomes possible.

In the bayonet coupling method, for example, as described in Patent Document 1, claw-shaped portions are formed in the vicinity of the mount surfaces of the interchangeable lenses for the purpose of bringing the mount surfaces of the interchangeable lenses into close contact with the mount surfaces of the image pickup apparatus main body. There is. Then, by relatively rotating the interchangeable lens and the image pickup device main body in a state where the mount surfaces are in contact with each other, the claw-shaped portions are fitted to each other. At the same time that the interchangeable lens and the image pickup device main body are engaged, the spring member built in the image pickup device main body urges the claw-shaped portion of the interchangeable lens toward the image pickup device main body side. As a result, the mount surface of the interchangeable lens comes into close contact with the mount surface of the image pickup apparatus main body, and the interchangeable lens is held by the image pickup apparatus main body.

Japanese Unexamined Patent Publication No. 2004-102005

However, in the conventional bayonet coupling method, the interchangeable lens is brought into close contact with the mount surface by the urging force of the spring member. Therefore, when a load exceeding the urging force of the spring member is applied in the direction of separating the interchangeable lens from the mount surface, the mount surface of the interchangeable lens may be slightly separated from the mount surface of the image pickup apparatus main body. .. Further, if the adhesion of the mount surface is insufficient, there is a problem that the interchangeable lens may rattle with respect to the image pickup apparatus.

On the other hand, if the urging force of the spring member is set to be large, the frictional force generated by the urging force of the spring member becomes large, which makes it difficult for the user to perform the relative rotational operation of the interchangeable lens and the image pickup apparatus main body in the bayonet coupling method. There is a problem of becoming.

An object of the present invention is to strengthen the attachment of an accessory to a mounting device without impairing the operability of attaching / detaching the accessory to the mounting device.

In order to achieve the above object, the mount device according to claim 1 is a mount device that can be attached to the image pickup device main body and has an accessory that can be attached and detached, and is in contact with the first mount surface of the accessory. When the mounting member having the mounting surface of 2 and the side of the mounting device where the mounting member is provided are the front side, a part of the mounting member is located on the back side of the mounting member and is in the direction of the central axis of the mounting member. The movable member includes a movable member that is movable in the movable member and an urging means that urges the movable member toward the mount member in the central axis direction, and the movable member is used when the accessory is attached to the mount device. The accessory is provided with a second claw portion that engages with the first claw portion in the central axial direction.

According to the present invention, it is possible to firmly attach the accessory to the mounting device without impairing the operability of attaching / detaching the accessory to the mounting device.

It is a perspective view of the front side of the image pickup apparatus main body provided with the lens mount apparatus which concerns on 1st Embodiment of this invention. It is a perspective view of the front side of the image pickup apparatus main body which attached the interchangeable lens. It is an exploded perspective view seen from the front side of a lens mount device. It is an exploded perspective view seen from the back side of a lens mount device. It is a perspective view of the front side of a translation member. It is a perspective view of the front side of a fixed base. It is a perspective view of the back side of a fixed base. It is sectional drawing which was seen from the direction which passes through the fastening part and orthogonal to the optical axis through a fixing base, a support member, a fastening screw and a spring. It is a perspective view of the back side of an interchangeable lens. It is a rear view which shows the main part of an interchangeable lens and a lens mount device. 10 (b) is a cross-sectional view taken along the line AA showing the overlapping state of the claw portion of the support member and the bayonet claw portion of the interchangeable lens in FIG. 10 (b). It is a perspective view of the image pickup apparatus main body which attached the lens mount apparatus which concerns on 2nd Embodiment, as seen from the front upper side. It is a view of the back side of an interchangeable lens. It is an exploded perspective view which shows the structure of the lens mount device. It is a perspective view of the front side of a translation member. It is a perspective view of the front side of a leaf spring member. It is a figure which shows the state just before attaching an interchangeable lens to an image pickup apparatus main body. It is a figure which shows the state immediately after attaching an interchangeable lens to an image pickup apparatus main body. It is a figure which shows the state which the user-operated screw was tightened after the interchangeable lens was attached to the body of an image pickup apparatus. It is an exploded perspective view which shows the lens mount apparatus which concerns on 3rd Embodiment. It is a front view of the image pickup apparatus main body which attached the lens mount apparatus which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the state which attached the interchangeable lens to the image pickup apparatus main body which attached the lens mount apparatus which concerns on 3rd Embodiment.

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

In the present specification, the surface of the imaging device viewed from the subject side is the front surface, the surface facing the front surface is the back surface, the surface on the right side when viewed from the front is the right side surface, and the surface on the left side when viewed from the front is the left side surface and the front surface. The upper surface when viewed from the front is called a flat surface, and the lower surface when viewed from the front is called the bottom surface.

<First Embodiment>
First, an outline of the lens mount device according to the first embodiment will be described.

FIG. 1 is a perspective view of the front side of the image pickup apparatus main body 1000 provided with the lens mount apparatus according to the first embodiment of the present invention. Further, FIG. 2 is a perspective view of the front side of the image pickup apparatus main body 1000 to which the interchangeable lens 1100 is attached.

In FIGS. 1 and 2, the image pickup device main body 1000 is provided with a lens mount on the main body side (hereinafter, referred to as “lens mount device 1010”) for attaching / detaching an interchangeable lens 1100 as an accessory on the front side. At the four corners of the lens mount device 1010, a plurality of fastening screws 1011a to 1011d that the user tightens in order to firmly fix the interchangeable lens 1100 mounted on the lens mount device 1010 to the image pickup device main body 1000 are arranged. A detailed description of the method of tightening the fastening screws 1011a to 1011d (screw members) will be described later.

FIG. 3 is an exploded perspective view of the lens mount device 1010 as viewed from the front side. Further, FIG. 4 is an exploded perspective view of the lens mount device 1010 as viewed from the back side. In the following description, the axis passing through the center of the mount member (or the center of the image sensor of the sensor unit 1015) is set as the central axis with reference to FIG. 3, and in the present embodiment, the interchangeable lens 1100 is mounted on the lens mount device 1010. When the lens is mounted, it substantially coincides with the optical axis of the interchangeable lens 1100. Then, in the central axis direction (that is, the optical axis direction), the side where the mount member 1040 is located is the front side, and the side where the translation member (movable member) 1020 is located with respect to the mount member 1040 is the back side. Therefore, although there are places where each member is partially overlapped, in the central axis direction, from the front side to the back side, the mount member 1040, the translation member 1020, the contact unit 1018, the fixed base 1030, and the sensor unit 1015. They are arranged in order.

In FIGS. 3 and 4, the lens mount device 1010 includes a fixed base 1030. A mount member 1040, a translation member 1020, a fastening screw 1011a-1011d, a spring 1014a-1014d (first urging means), a lock pin unit 1017, and a contact unit 1018 are attached to the front side of the fixed base 1030. On the other hand, the sensor unit 1015 is attached to the back side behind the fixed base 1030.

The mount member 1040 includes a mount surface 1041 on the main body side for contacting the lens mount surface 1112 (see FIG. 9) of the interchangeable lens 1100, which will be described later. Further, the mount member 1040 includes a main body index 1042 for indicating the phase of attachment / detachment of the interchangeable lens to the user by matching the phase with the lens index 1114 (see FIG. 9) described later of the interchangeable lens 1100. The translational member 1020, the fastening screws 1011a to 1011d, and the springs 1014a to 1014d located behind the mount member 1040 are members that operate when the user attaches the interchangeable lens 1100 to the image pickup apparatus main body 1000, respectively. A detailed description of these will be described later.

The lock pin unit 1017 is a member for positioning in the rotational direction when the interchangeable lens 1100 is attached to the lens mount device 1010. The contact unit 1018 is a contact for the image pickup apparatus main body 1000 to exchange information with the interchangeable lens 1100. The sensor unit 1015 is a unit in which a sensor substrate on which an image sensor is mounted and a sensor heat dissipation plate for radiating heat from the sensor substrate are integrated.

FIG. 5 is a perspective view of the translation member 1020 on the front side.

The parallel member 1020 is located on the back side facing the front side of the mount member 1040 in the optical axis (central axis of the mount member 1040) direction, and serves as a movable member that abuts on the surface (opposite surface) facing the mount surface 1041. Function. The translation member 1020 is movable in the optical axis direction.

The translation member 1020 includes a claw portion (second claw portion) 1021a-1021c for engaging with the bayonet claw portion (first claw portion) 1111a to 1111c of the lens side mount portion 1110 (see FIG. 9). There is. Further, the parallel member 1020 includes a seat surface portion 1022a-1022d provided with a hole for tightening the fastening screw (screw member) 1011a-1011d. The claw portions 1021a to 1021c of the translation member 1020 are formed at positions overlapping with the bayonet claw portion of the mount member 1040 on the front view of the image pickup apparatus viewed from the front side (that is, the subject side). As a result, the claw portions 1021a to 1021c of the translation member 1020 can cross the bayonet claw portion of the mount member 1040 and engage with the bayonet claw portions 1111a to 1111c of the lens side mount portion 1110.

The claw portions 1021a to 1021c and the seat surface portions 1022a to 1022d are formed by a surface orthogonal to the optical axis, in other words, a surface parallel to the mount surface 1041 of the mount member 1040. The frame body portions 1023a to 1023c connecting the claw portions 1021a to 1021c and the seat surface portions 1022a to 1022d are formed by a surface horizontal to the optical axis, in other words, a surface perpendicular to the mount surface 1041 of the mount member 1040. Further, beats 1024a to 1024c are applied to the bent portion connecting the claw portion 1021a to 1021c and the frame body portion 1023a to 1023c.

As a result, the parallel member 1020 has a structure resistant to deformation, and the force applied to the seat surface portion 1022a-1022d by tightening the fastening screws 1011a-1011d can be efficiently transmitted to the claw portion 1021a-1021c. Become.

FIG. 6 is a perspective view of the fixed base 1030 on the front side. Further, FIG. 7 is a perspective view of the fixed base 1030 on the back side.

In FIGS. 6 and 7, the fixed base 1030 as a base member has a plurality of fastening portions 1031a to 1031d for tightening the fastening screws 1011a to 1011d on the front side. Further, the fixed base 1030 has a structure for mounting a mount member 1040, a contact unit 1018, a lock pin unit 1017, etc. on the front side, and a sensor unit mounting portion 1032 for fixing the sensor unit 1015 on the back side. There is.

FIG. 8 is a cross-sectional view of the fixed base 1030, the parallel member 1020, the fastening screw 1011a, and the spring 1014a as viewed from the direction perpendicular to the optical axis through the fastening portion 1031a.

In FIG. 8, the translation member 1020 is vertically urged toward the front side (right side in the drawing) by a spring 1014a arranged so as to surround the fastening portion 1031a of the fixed base 1030. However, when the user tightens the fastening screw 1011a with a hexagon wrench or the like, the translation member 1020 is pulled to the back side (left side in the drawing) against the urging force of the spring 1014a. That is, the translational state of the translation member 1020 and the fastening screws 1011a to 1011d changes according to the user's operation, so that the translational member 1020 moves in a direction that opposes the urging force of the spring 1014a. The relationship between the spring 1014a and the fastening screw 1011a has been described using the cross section passing through the fastening portion 1031a, but the relationship between the spring 1014b to 1014d and the fastening screw 1011b to 1011d is also the same. The fastening screws 1011a to 1011d are arranged outside the outer shape of the interchangeable lens 1100 on the front view of the lens mount device 1010 when the interchangeable lens 1100 is attached to the image pickup apparatus main body 1000. With this configuration, the user can easily perform the tightening operation of the fastening screws 1011a to 1011d.

Next, a method of attaching / detaching the interchangeable lens 1100 to / from the image pickup apparatus main body 1000 will be described.

FIG. 9 is a perspective view of the rear side of the interchangeable lens 1100.

In FIG. 9, the interchangeable lens 1100 includes a lens-side mount portion 1110 having a structure similar to that of a conventional bayonet type lens mount. The lens-side mount portion 1110 includes a lens mount surface 1112, bayonet claw portions 1111a to 1111c, a positioning hole 1113, and a lens index 1114 as a structure for being attached to and detached from the lens mount device 1010 of the image pickup device main body 1000. .. Further, the interchangeable lens 1100 includes components such as a lens portion (not shown) and a contact portion for communicating with the image pickup apparatus main body 1000.

FIG. 10 is a rear view showing a main part of the interchangeable lens 1100 and the lens mount device 1010. In FIG. 10, FIG. 10A is a diagram showing a state in which the lens index 1114 (see FIG. 9) of the interchangeable lens 1100 and the main body index 1042 (see FIG. 3) of the lens mount device 1010 are in phase with each other. Further, FIG. 10B shows a state in which the interchangeable lens 1100 is rotated by 55 ° counterclockwise when viewed from the rear side from the state of FIG. 10A, and the interchangeable lens 1100 is attached to the lens mount device 1010. It is a figure.

In FIG. 10A, the claws 1021a to 1021c of the translation member 1020 and the bayonet claws 1111a to 1111c of the interchangeable lens 1100 do not overlap each other when viewed from the rear direction. Therefore, the interchangeable lens 1100 is in a position where it can be attached to and detached from the image pickup apparatus main body 1000.

On the other hand, in FIG. 10B, the claw portions 1021a to 1021c of the translation member 1020 and the bayonet claw portions 1111a to 1111c of the interchangeable lens 1100 are in an overlapping state when viewed from the rear direction. That is, the interchangeable lens 1100 is engaged and mounted on the lens mount device 1010, and the interchangeable lens 1100 is in a non-removable state so that the user can take a picture.

When the interchangeable lens 1100 is in the phase of FIG. 10B with respect to the lens mount device 1010, the lock pin unit 1017 (see FIG. 3) of the lens mount device 1010 has a positioning hole 1113 (FIG. 3) of the lens-side mount portion 1110. 9). As a result, the user can recognize that the imaging device is in a phase that can be photographed.

11 (a) and 11 (b) are cross-sectional views taken along the line AA showing the overlapping state of the claw portion 1021c of the translation member and the bayonet claw portion 1111c of the interchangeable lens in FIG. 10 (b), respectively.

In FIG. 11A, the translation member 1020 is urged to the front side (upper side in the drawing) by springs 1014a to 1014d (not shown). Therefore, in FIG. 11A, the distance α1 from the lens mount surface 1112 of the lens side mount portion 1110 to the bayonet claw portion 1111c and the distance from the mount surface 1041 on the main body side to the back surface side surface of the claw portion 1021c. The relationship of β1 is α1> β1. That is, there is a gap between the bayonet claw portion 1111c on the lens side and the claw portion 1021c on the main body side, and the interchangeable lens 1100 is mounted with a slight gap with respect to the image pickup apparatus main body 1000.

FIG. 11B shows a state in which the user has tightened the fastening screws 1011a to 1011d from the state of FIG. 11A. In FIG. 11B, the translation member 1020 is pushed toward the back side (lower side in the figure) against the force of the springs 1014a to 1014d, and is pushed from the mount surface 1041 on the main body side to the back side of the claw portion 1021c. The distance β2 to the surface is larger than β1 and equal to α1.

As described above, in the state of FIG. 11B in which β2 = α1, the gap between the bayonet claw portion 1111c on the lens side and the claw portion 1021c on the main body side, which existed in the state of FIG. 11A, is It disappears. Then, the lens mount surface 1112 of the interchangeable lens 1100 is firmly adhered to the main body mount surface 1041 of the mount member 1040 of the image pickup apparatus main body 1000, and is in a state of no play.

The relationship between the claw portion 1021a on the main body side and the bayonet claw portion 1111a on the lens side has been described above, but the relationship between the claw portion 1021b and the bayonet claw portion 1111b and the relationship between the claw portion 1021c and the bayonet claw portion 1111c. Is the same for each.

According to the present embodiment, the translation member 1020 that abuts on the surface of the mount member 1040 facing the mount surface 1041 and the springs 1014a to 1014d that press and urge the translation member 1020 toward the mount member are provided. Further, fastening screws 1011a to 1011d for moving and pressing the parallel member 1020 to the image sensor side, which is the anti-mount member side, are provided. As a result, when the interchangeable lens 1100 is attached to the lens mount device 1010 of the image pickup apparatus main body 1000, the springs 1014a to 1014d are urged by the translation member 1020 and move to the mount member 1040 side. Therefore, it is possible to effectively prevent the engagement between the claw portion on the main body side and the claw portion on the lens side from being hindered. Further, by tightening the fastening screws 1101a to 1101a to d in this state, there is no gap between the claws 1021a to 1021a to c of the translation member 1020 and the bayonet claws 1111a to c on the lens side, and the interchangeable lens 1100 is attached to the image pickup apparatus main body 1000. Can be firmly attached to the lens.

Further, according to the present embodiment, in order to firmly engage the interchangeable lens 1100 with the image pickup device main body 1000, a combination of the translation member 1020, the springs 1014a to d, and the fastening screws 1011a to d is combined with the main body mount surface of the image pickup device main body 1000. It was provided on the back side of 1041. As a result, the size of the image pickup apparatus main body 1000 can be reduced as compared with the conventional screw type lens mount. In the case of the conventional screw type lens mount, it is necessary to provide the surfaces having the roles of the claw portions 1021a to 1021a to c and the bayonet claw portions 1111a to c on the front side of the main body mount surface 1041 of the image pickup apparatus main body 1000. , It was not suitable for miniaturization of the image pickup device main body.

Further, according to the present embodiment, by tightening the fastening screws 1011a to 1021c, the gap between the claw portions 1021a to 1021c and the bayonet claw portions 1111a to 1111c is eliminated, and the interchangeable lens is reliably attached to the image pickup apparatus main body 1000. Can be installed. As a result, it is possible to prevent rattling of the interchangeable lens 1100 after mounting as compared with the conventional bayonet type lens mount method.

In the present embodiment, the lens mount device 1010 is detachably configured with respect to the image pickup device main body 1000. This makes it possible to select and apply the optimum lens mount device 1010 according to the accessory. However, the lens mount device 1010 can also be configured integrally with the image pickup device main body 1000.

<Second embodiment>
Next, a second embodiment of the present invention will be described.

FIG. 12 is a perspective view of the image pickup apparatus main body 2000 equipped with the lens mount apparatus according to the second embodiment as viewed from the front upper side.

In FIG. 12, the image pickup apparatus main body 2000 is an image pickup apparatus in which lenses can be exchanged, and as in the first embodiment, an interchangeable lens 1100 and an interchangeable lens 2100 having different ZOOM magnifications can be attached. Hereinafter, in the present embodiment, a case where the interchangeable lens 2100 is attached to the image pickup apparatus main body 2000 will be described.

An annular lens mount (lens mount device 2010) on the main body side is provided on the front surface of the image pickup apparatus main body 2000. The image sensor 2200 is exposed from the central opening of the lens mount device 2010. The image sensor 2200 is arranged with high accuracy so that the image sensor 2200 is parallel to the lens mount device 2010 on the main body side and is rearward by a specified distance. A contact terminal 2019 on the main body side is arranged in an arc shape on the lower side of the lens mount device 2010. Further, the contact terminal 2019 on the main body side and the image sensor 2200 are electrically connected to a control board and a power supply (not shown) provided inside the main body 2000 of the image pickup device, respectively.

FIG. 13 is a perspective view of the rear side of the interchangeable lens 2100.

In FIG. 13, the interchangeable lens 2100 has a lens mount surface 2112 on the back surface and an interchangeable lens side contact terminal 2114 that is electrically coupled to the main body side contact terminal 2019 of the image pickup apparatus main body 2000. As a result, when the interchangeable lens 2100 is attached to the image pickup apparatus main body 2000, the power supply and drive to the interchangeable lens 2100 can be controlled from the image pickup apparatus main body 2000 side.

The lock pin unit 2017, which is engaged in the rotational direction of the mounted interchangeable lens 2100, is arranged in the lens mount device 2010 in a protruding state (see FIG. 12). Further, an eject lever 2016 is arranged in the vicinity of the lock pin unit 2017. The lock pin unit 2017 of the image pickup apparatus main body 2000 is urged in a direction protruding from the lens mount apparatus 2010, that is, toward the subject side by an elastic member (not shown). Further, the eject lever 2016 is connected to the lock pin unit 2017 inside the device, and is interlocked with the lock pin unit 2017.

As a result, the image pickup apparatus main body 2000 can retract the lock pin unit 2017 to the surface of the lens mount apparatus 2010 by pushing the lock pin unit 2017 from the front. Further, in the image pickup apparatus main body 2000, the protruding lock pin unit 2017 can be retracted to the lens mount apparatus 2010 surface by the operation of pushing the eject lever 2016 from the front.

As shown in FIG. 13, the interchangeable lens 2100 side is provided with a positioning hole 2113 that engages with the lock pin unit 2017 when the interchangeable lens 2100 is attached to the image pickup apparatus main body 2000.

Further, as shown in FIG. 12, user-operated screws 2011a to 2011 are arranged around the lens mount device 2010 on the main body side so as to be exposed from the outside, and the tip shape of the user-operated screws 2011a to c is , Hexagon wrench and driver compatible shape. This facilitates the operation of the user-operated screws 2011a to c by the user. User-operated screws 2011a-c function as fastening screws.

FIG. 14 is an exploded perspective view showing the configuration of the lens mount device 2010.

In FIG. 14, the lens mount device 2010 includes a mount member 2040. The mount member 2040 is an annular member having a main body mount surface 2041 with which the interchangeable lens 2100 abuts on the front surface, and three bayonet claws 2084a to 204 extending toward the central opening side are integrated with the annular member. Is formed. The mount member 2040 is fastened to a fixed base 2030 made of strong metal as a strength member inside the device from the front by screws 2081a to d. Further, behind the fixed base 2030, a sensor unit 2015 is fastened from the back surface by screws 2068a to c.

The sensor unit 2015 is a unit in which the image sensor 2200 mounted on the substrate 2061 and the sheet metal 2067 which is a member for attaching to the fixed base 2030 are integrated. The position and inclination of the image sensor 2200 are adjusted by sandwiching washers 2070a to 20c of appropriate thickness in the assembly process of the sensor unit 2015, and the image sensor 2200 is assembled with high accuracy. By attaching the mount member 2040 and the image sensor 2200 with the fixed base 2030 sandwiched in this way, the position of the image sensor 2200 with respect to the mount member 2040 is adjusted with high accuracy.

On the back side of the mount member 2040, a translational member 2020 that comes into contact with the surface of the mount member 2040 facing the mount surface 2041 is arranged. The translation member 2020 functions as a movable member as in the first embodiment.

On the rear surface of the translation member 2020, a leaf spring member 2050 formed in a ring shape (circular shape) is arranged so as to overlap the translation member 2020. A contact unit 2018 including a main body side contact terminal 2019 is arranged behind the leaf spring member 2050. Coil springs 2014a to 2014c are arranged at three places on the back surface of the leaf spring member 2050 so as to be sandwiched between the leaf spring member 2050 and the fixed base 2030.

The translation member 2020 and the leaf spring member 2050 are held on the fixed base 2030 with the coil springs 2014a to 2014c sandwiched by the user-operated screws 2011a to c that are fastened from the front of the image pickup apparatus main body 2000. That is, the coil spring 2014 is arranged between the back surface of the leaf spring member 2050 and the fixed base 2030 in a compressed state as compared with the natural state. As a result, the translation member 2020 and the leaf spring member 2050 are urged in the same direction on the mount member 2040 side by the coil springs 2014a to c.

Next, the translation member 2020 will be described in detail.

FIG. 15 is a perspective view of the translation member 2020 on the front side.

In FIG. 15, the translation member 2020 is a flat and ring-shaped plate member made of a highly rigid metal, and has a ring-shaped main surface 2020s and a ring-shaped main surface 2020s toward the center of the central space 3 It is composed of two extension portions 2022a to 2022c. The ring-shaped main surface 2020s, which is the root of the extending portions 2022a to 2022c, is provided with through holes 2023a to 2023c through which the user-operated screws 2011a to 2011c penetrate, respectively.

The through holes 2023a to 2023c are arranged so that the triangular 2025 connecting the through holes 2023a to 2023c forms a substantially equilateral triangle. Further, as shown in FIG. 14, the extending portions 2022a to 2022c are arranged at positions where they overlap with the bayonet claws 2084a to 2084c of the mounting member 2040 on the projection drawing (on the front view) when viewed from the front of the apparatus.

Next, the leaf spring member 2050 will be described in detail.

FIG. 16 is a perspective view of the leaf spring member 2050 on the front side.

In FIG. 16, the leaf spring member 2050 (second urging means) is a flat and ring-shaped (circular) plate-shaped member formed of a metal having a spring property, which is thinner than the translational member 2020. Like the translation member 2020, the leaf spring member 2050 is composed of a ring-shaped main surface 2050s and three T-shaped extending portions 2050a to c2050 toward the center of the central space portion. The three T-shaped extending portions 2050a to c2050 are evenly provided along the inner peripheral direction of the leaf spring member 2050, which is a ring-shaped (circular) plate-shaped member.

The extending portions 2050a to 2050c are naturally bent in one direction with respect to the ring-shaped main surface 2050s away from the mounting surface 2041 of the mounting member 2040 shown in FIG. As a result, when the interchangeable lens is attached, the springiness of the leaf spring member 2050 urges the bayonet claws 2111a to 211 of the interchangeable lens 2100 in the direction of pulling in from the main body mount surface 2041 toward the image sensor 2200. It is possible to hold the wearing of the interchangeable lens.

Further, the leaf spring member 2050 is also provided with through holes 2053a to 2053c at the same position on the projection surface as the translation member 2020. Therefore, the triangle 2055 connecting the three through holes 2053a to 2053c is also a substantially equilateral triangle. Further, the extending portions 2050a to 2050c extend from the through holes 2053a to 2053c portion of the main surface 2050s in the direction of the center of gravity of the above-mentioned triangular 2055, and the extending tip portion rotates when the interchangeable lens 2100 described later is attached or detached. It has a T-shape that extends in the direction of operation.

Next, a method of attaching the interchangeable lens 2100 to the image pickup apparatus main body 2000 will be described.

17 to 19 are drawings used for explaining a method of mounting an interchangeable lens on the image pickup apparatus main body, and each (a) is a perspective view of a main part viewed from the front direction, and (b) is Is a perspective view of a main part viewed from the rear direction. Further, FIG. 3C is a diagram showing a cross section taken along the line AA shown in FIG. In (c), the front side of the image pickup apparatus main body 2000 is shown as the upper side. In FIGS. 17, 18, and 19, for convenience, the image pickup apparatus main body 2000 is represented only by the mount member 2040, the user-operated screw 2011, the translation member 2020, the leaf spring member 2050, and the coil spring 2014 as main parts. ..

Hereinafter, a method of mounting the interchangeable lens 2100 on the image pickup apparatus main body 2000 will be described in detail with reference to FIGS. 17, 18, and 19.

FIG. 17 is a diagram showing a state immediately before the interchangeable lens is attached to the image pickup apparatus main body. In FIG. 17, when the interchangeable lens 2100 is attached to the image pickup apparatus main body 2000, it is the same as the conventional bayonet method. That is, the interchangeable lens 2100 is moved along the arrow L direction to approach the image pickup apparatus main body 2000 while avoiding the bayonet claws 2084a to 2040 of the mount member 2040. At this time, the translation member 2020 and the leaf spring member 2050 are arranged on the projection when viewed from the front of the mount member 2040 of the image pickup apparatus main body 2000. Therefore, the bayonet claws 2111a to 2111c on the interchangeable lens 2100 side are inserted into the image pickup apparatus main body 2000 without contacting the protruding portions 2022a to 2022c of the translation member 2020.

In FIG. 17C, in a state immediately before the user attaches the interchangeable lens 2100 to the image pickup apparatus main body 2000, the translation member 2020 and the leaf spring member 2050 are in contact with the mount member 2040 by the reaction force of the coil spring 2014. ..

When the interchangeable lens 2100 is inserted into the image pickup device main body 2000 and the interchangeable lens 2100 is rotated by about 50 ° counterclockwise while pressing the interchangeable lens 2100 against the image pickup device main body 2000, the lock pin 2006 causes the positioning hole 2113 of the interchangeable lens 2100. Fits into. As a result, the interchangeable lens 2100 is attached to the image pickup apparatus main body 2000 (see FIG. 18C).

FIG. 18 is a diagram showing a state immediately after the interchangeable lens 2100 is attached to the image pickup apparatus main body 2000. That is, FIG. 18 shows a state immediately after the interchangeable lens 2100 is attached to the image pickup apparatus main body 2000 and before the user-operated screws 2011a to 2011 are tightened by the user.

In FIG. 18, as shown in the M portion of FIG. 18C, in the image pickup apparatus main body 2000, the leaf spring member 2050 comes into contact with the bayonet claw portions 2111a to c of the interchangeable lens 2100, and the bayonet claw portions 2111a to c are brought into contact with each other. It is urged inside the image pickup apparatus main body 2000. As a result, the lens mount surface 2112 of the interchangeable lens 2100 and the mount surface 2041 of the mount member 2040 on the main body side are in close contact with each other.

At this time, the translation member 2020 and the leaf spring member 2050 are in contact with the mount member 2040 on the main body side by the reaction force of the coil spring 2014. Therefore, the bayonet claws 2111a to 2111a to c of the interchangeable lens 2100 do not get caught in the translation member 2020 by the rotational operation at the time of mounting.

Further, as shown in FIG. 16, the tip portions of the extending portions 2050a to 2050c of the leaf spring member 2050 have a T-shape extending in the rotational operation direction when the interchangeable lens 2100 is attached / detached. Therefore, the T-shaped tip is smoothly bent and pressed toward the translation member 2020 by the rotational operation when the interchangeable lens 2100 is attached. As a result, the bayonet claws 2111a to 2111a to c of the interchangeable lens 2100 do not get caught in the leaf spring member 2050 due to the rotational operation when the interchangeable lens 2100 is attached.

During the mounting operation of the interchangeable lens 2100, the interchangeable lens 2100 is rotated while being pressed against the image pickup apparatus main body 2000. Therefore, it slides between the main body side contact terminal 2019 (see FIG. 12) arranged in an arc shape on the image pickup device main body side and the interchangeable lens side contact terminal 2114 (see FIG. 13) arranged on the interchangeable lens side. The operation is performed. As a result, even if there is a foreign substance between the main body side contact terminal 2019 and the interchangeable lens side contact terminal 2200, or if there is a deteriorated portion due to the oxide film formed on the contact surface, these can be scraped off and removed.

The above-mentioned mounting operation is the same mounting operation as a general bayonet type lens mount method for the user. That is, the urging force of the leaf spring member 2050 is a load capable of achieving both close contact between the main body mount surface 2041 of the image pickup apparatus main body 2000 and the lens mount surface 2112 of the interchangeable lens 2100 and operability of the interchangeable lens mounting operation. As described above, the same mounting operation as the general bayonet type lens mount method is referred to as the first mounting operation in the present embodiment.

In the present embodiment, the second mounting operation by the user is performed following the first mounting operation described above. As a result, the main body mount surface 2041 of the image pickup apparatus main body 2000 and the lens mount surface 2112 of the interchangeable lens 2100 can be brought into close contact with each other more firmly.

Hereinafter, the second mounting operation will be described.

FIG. 19 is a diagram showing a state in which the user-operated screw is tightened after the interchangeable lens is attached to the main body of the image pickup apparatus.

In FIG. 19, the image pickup apparatus main body 2000 shows a state in which the user tightens the user operation screws 2011a to 2011c exposed on the front surface of the image pickup apparatus main body 2000 from the state of FIG.

In FIG. 19, the user-operated screws 2011a to 2011c are screwed with the fixed base 2030 inside the device (not shown) (FIG. 19 (c)). Therefore, as the user-operated screws 2011a to 2011c rotate, the user-operated screws 2011a to 2011c are driven in the rearward direction (lower side in the drawing). When the user-operated screws 2011a to 2011c are driven in the rearward direction, the back surface of the head of the user-operated screws 2011a to 2011c comes into contact with the translation member 2020, and the translation member 2020 also comes into contact with the translation member 2020 as the user-operation screws 2011a to 2011c progress. Drive inside. That is, the translation member 2020 overcomes the urging force of the coil spring 2014 arranged at the rear and drives in the rearward direction.

In the lens mount device 2010, the leaf spring member 2050 is arranged behind the translation member 2020. Therefore, the leaf spring member 2050 also moves in the back direction as the translation member 2020 is driven in the back direction.

Here, the image pickup apparatus main body 2000 abuts on the bayonet claw of the interchangeable lens 2100 due to the springiness of the extension portions 2050a to 2050 of the leaf spring member 2050 during the first mounting operation, and this is brought to the image pickup apparatus main body 2000 side. I'm urging. Further, in the second mounting operation, as shown in FIG. 19C, in addition to the urging force of the leaf spring member 2050 by the extending portions 2050a to 20c, the translation member 2020 and the leaf spring member 2050 directly replace the lens. The bayonet claw of the lens can be pressed toward the image pickup device main body 2000 side.

That is, in the present embodiment, the leaf spring member 2050 is the interchangeable lens in the first usage mode after the interchangeable lens 1100 is attached to the image pickup apparatus main body 1000 and before the translational member 2020 is fastened by the user-operated screw 2011. It is in contact with the 1100 bayonet claws. Further, the leaf spring member 2050 is attached to the bayonet claw of the interchangeable lens 1100 in the second usage mode after the interchangeable lens 1100 is attached to the image pickup apparatus main body 1000 and then the translational member 2020 is fastened by the user-operated screw 2011. It is in contact. The leaf spring member 2050 is in contact with the bayonet claw of the interchangeable lens 1100 in both the first and second usage modes.

As a result, the leaf spring member 2050 reinforces the state in which the interchangeable lens 1100 is attached to the image pickup apparatus main body 1000.

According to the present embodiment, following the first mounting operation similar to the general bayonet type lens mount method, the user performs a second mounting operation of tightening the user-operated screws 2011a to 2011c. As a result, the main body mount surface 2041 of the image pickup apparatus main body 2000 and the lens mount surface 2112 of the interchangeable lens 2100 can be brought into close contact with each other with a larger load than the first mounting operation.

Further, according to the present embodiment, in the second mounting operation, the translational member 2020 can be smoothly moved without excessively bending the ring-shaped main surface 2020s of the translational member 2020. That is, the user cannot simultaneously tighten the three user-operated screws 2011a to c2011 in the second mounting operation. Therefore, the user first tightens one of the user-operated screws 2011a to 2011c, then tightens the next user-operated screw 2011, and then tightens the last remaining user-operated screw 2011. Tighten the user-operated screws 2011a to 2011c.

As shown in FIG. 15, the through holes 2023a to 2023c provided in the translation member 2020 are arranged at positions where the triangle connecting the through holes 2023a to 2023c becomes a substantially equilateral triangle. Since the plane is generally defined by the constraint of three points, by arranging the through holes 2023a to 2023c in a substantially regular triangular shape, the ring-shaped main surface 2020s is not excessively bent during the tightening operation by the user. The translation member 2020 can be smoothly moved.

Further, according to the present embodiment, the leaf spring member 2050 is provided with through holes 2053a to 2053c at the same positions on the projection as the through holes of the translation member 2020. As a result, the leaf spring member 2050 can be smoothly moved during the tightening operation by the user. That is, as shown in FIG. 16, the leaf spring member 2050 is provided with through holes 2053a to 2053c at the same position on the projection as the through hole of the translation member 2020. Therefore, the triangular 2055 connecting the through holes 2053a to 2053c also has a substantially equilateral triangle, which enables smooth movement.

Further, in the leaf spring member 2050, the extending portions 2050a to 2050c extending toward the center extend from the vicinity of the through holes 2053a to 2053c toward the center of the central space portion in the direction of the center of gravity of the triangle 2055. .. Therefore, the magnitude of the tilt angle of the parallel member 2020 is proportional to the amount of deformation of the extending portions 2050a to 2050c, and the leaf spring member 2050 can be smoothly moved.

As described above, according to the present embodiment, the main body mount surface 2041 on the device main body side and the lens mount surface 2112 of the interchangeable lens are caused by the smooth movement of the members by the second mounting operation of tightening the user-operated screws 2011a to 2011. Can be adhered more firmly. Therefore, it is particularly effective when a large adapter is attached to the front surface of the interchangeable lens 2100 or when the interchangeable lens 2100 is not easily attached / detached for crime prevention. Further, when the distance management between the interchangeable lens 2100 and the image sensor 2200 is required with higher accuracy, the interchangeable lens mount surface can be firmly adhered to the image pickup device main body mount surface.

Further, according to the present embodiment, a stronger mount surface can be obtained by tightening the exposed screws around the mount (second mounting operation) as necessary while supporting lens replacement by the normal bayonet method. It is possible to realize a lens mount device that realizes close contact.

<Third embodiment>
Next, the lens mount device according to the third embodiment of the present invention will be described.

The present embodiment is a modification of the lens mount device according to the first embodiment. Therefore, the same components as those in the first embodiment will be omitted, and the differences from the first lens mount device will be mainly described.

FIG. 20 is an exploded perspective view showing the lens mount device according to the third embodiment.

In FIG. 20, in the present embodiment, instead of the fastening screws 1011a-1011d (see FIG. 3) in the first embodiment, special screws 3011a to 3011d having a gear shape portion provided on the side surface of the screw head are used. .. By tightening the special screws 3011a to 3011d, the parallel member 3020 is pulled in to the back side. Hexagonal holes 3013a to 3013d are provided on the top surfaces of the special screws 3011a to 3011d, respectively. The special screws 3011a to 3011d function as fastening screws.

Further, the lens mount device of the present embodiment includes an intermediate gear member 3021 that rotates by fitting with a gear-shaped portion provided on the side surface of the screw head of the special screws 3011a to 3011d. The intermediate gear member 3021 as an intermediate member is a rotatable circular member, and gear-shaped portions for engaging with the gear-shaped portions of the special screws 3011a to 3011d are provided on the entire circumference of the circular outer peripheral surface. The inner side surface 3022 of the intermediate gear member 3021 is slidable in sliding contact with the mount side surface 3040a of the mount member 3040.

FIG. 21 is a front view of the image pickup apparatus main body 3000 equipped with the lens mount apparatus according to the third embodiment. Further, FIG. 22 is a perspective view showing a state in which an interchangeable lens is attached to an image pickup apparatus main body to which the lens mount apparatus according to the third embodiment is attached.

In FIG. 21, the gear-shaped portions of the special screws 3011a to 3011d are connected to the intermediate gear member 3021 so as to mesh with each other. In this state, for example, when the user inserts a hexagonal wrench into the hexagonal hole 3013d of the special screw 3011d, rotates it in the direction of the arrow α and tightens it, the intermediate gear member 3021 meshing with the gear of the special screw 3011d is interlocked. Rotate in the direction of arrow β. When the intermediate gear member 3021 rotates in the direction of arrow β, the remaining special screws 3011a to 3011c rotate in the α direction in conjunction with the rotation of the intermediate gear member 3021. As a result, the translation member 3020 is tightened to the fixed base 3030.

When the intermediate gear member 3021 rotates in the direction of the arrow β, as described above, the inner side surface 3022 of the intermediate gear member 3021 slides in a state of being fitted to the mount side surface 3040a of the mount member 3040. As a result, the intermediate gear member 3021 can appropriately transmit its rotational force to the special screws 3011a to 3011d without bending.

According to the third embodiment, the intermediate gear member 3021 having a gear portion that fits with the gear shape portion of the special screws 3011a to 3011d is provided on the outer peripheral portion. As a result, by tightening any one of the special screws 3011a to 3011d while the interchangeable lens 3100 is attached to the mount member 3040, all the remaining three special screws are also tightened in conjunction with each other to tighten the interchangeable lens 3100. It is fixed to the main body of the image pickup device. Therefore, the mounting time of the interchangeable lens 3100 can be significantly shortened as compared with the case where the special screws 3011a to 3011d at all four locations are sequentially tightened, and the convenience when mounting the interchangeable lens 3100 can be improved. it can.

In the present embodiment, a circular intermediate gear member 3021 is used as a mechanism for operating in conjunction with one operation, but if the same effect can be obtained, the configuration is not limited to this configuration, and other The means of construction of can also be applied.

As described above, according to each of the above-described embodiments, the mount surface of the interchangeable lens can be firmly adhered to the mount surface of the image pickup apparatus main body.

The present invention is not limited to the specific embodiments described above, and various embodiments within the scope of the gist of the present invention are also included in the present invention.

1000 Imaging device body 1010 Lens mount device (lens mount)
1011a to d Screws 1014a to d Spring 1020 Translation member (translation member)
1021a ~ c Claw part 1022a ~ d Seat surface 1023a ~ c Frame body part 1030 Fixed base 1031a ~ d Fastening part 1040 Mounting member 1041 Main body mount surface 1100 Interchangeable lens 1110 Lens side mount part 1112 Lens mount surface 1111a ~ c Bayonet claw part

Claims (13)

A mounting device that can be attached to the main body of the imaging device and has accessories that can be attached and detached.
A mounting member having a second mounting surface that abuts on the first mounting surface of the accessory.
When the side of the mounting device provided with the mounting member is the front side, a movable member that is partially located on the back side of the mounting member and can move in the central axis direction of the mounting member.
An urging means for urging the movable member toward the mount member in the central axis direction,
With
The movable member includes a second claw portion that engages with the first claw portion provided on the accessory in the central axial direction when the accessory is mounted on the mounting device. Mounting device. A claim characterized in that the movable member moves to the back surface side against the urging force of the urging means in a direction parallel to the central axis by changing the screwed state with the screw member. Item 1. The mounting device according to item 1. The movable member includes a second claw portion, a seat surface portion having a hole into which the screw member is screwed, and a frame body portion that connects the second claw portion and the seat surface portion. The second claw portion and the seat surface portion are surfaces parallel to the mount surface of the mount member, and the frame body portion is formed by a surface perpendicular to the mount surface of the mount member. The mounting device according to claim 2, wherein the mounting device is characterized. The mounting device according to claim 2 or 3, wherein the urging means is a spring member that presses the movable member from the back surface side of the movable member toward the mount member side in the central axis direction. .. A base member partially located on the back surface side of the movable member in the central axis direction is provided.
The spring member is located between the movable member and the base member.
In a state where the screw member is fastened to the base member, the contact surface of the second claw portion of the movable member comes into contact with the contact surface of the first claw portion of the accessory.
The mounting device according to claim 4, wherein the contact surface of the second claw portion faces the base member. The urging means is a first urging means, further including a second urging means for urging the movable member to the back surface side, and the second urging means moves the movable member. As a result, it can move in the same direction as the movable member.
The first usage mode before the accessory is attached to the image pickup apparatus main body and the movable member is moved to the back side by the screw member
The accessory is attached to the image pickup apparatus main body, and the movable member is in contact with the first claw of the accessory in both of the second usage forms after the movable member is moved to the back side by the screw member. The mounting device according to any one of claims 2 to 5, wherein the mounting device is characterized. The second urging means is a flat and circular plate-shaped member made of a metal having a spring property, and has a circular main surface and three toward the center of the circular space portion from the main surface. The mounting device according to claim 6, further comprising an extension portion. The three extending portions are evenly arranged along the inner peripheral direction of the circular main surface, and the tip portion of the extending portion projects in one direction with respect to the circular main surface. 7. The mounting device according to claim 7. The screw member is arranged outside the outer shape of the accessory with respect to the central axis when the mount device is viewed from the front side in a state where the accessory is attached to the image pickup device main body. The mounting device according to any one of claims 2 to 8. The movable member can be fastened to the base member by the plurality of screw members.
An intermediate member that engages with and drives each of the plurality of screw members is provided, and when the screwing state of any one of the plurality of screw members changes, the other screw is passed through the intermediate member. The mounting device according to claim 5, wherein the screwed state of the member changes. The plurality of screw members have a gear-shaped portion on the side surface of the screw head.
The intermediate member is a rotatable circular member, and the outer peripheral surface of the circular member is provided with a gear-shaped portion that engages with each of the gear-shaped portions of the plurality of screw members. 10. The mounting device according to 10. The mounting device according to any one of claims 1 to 11, wherein an interchangeable lens or an adapter device can be attached and detached as the accessory. An imaging device including the mounting device according to any one of claims 1 to 12.

Images