JP2012058708A - Camera accessory, accessory-side mount, camera body, and body-side mount - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability of a mount system while surely preventing a photographic lens from being erroneously attached to a camera body.SOLUTION: A camera accessory side-mount is structured so that body-side tabs and accessory-side tabs come into contact with each other at two or more positions in total to prevent erroneous attachment when it is intended to insert a photographic lens 2 at a phase other than the normal withdrawal phase. Moreover, it is structured that, when the body-side tabs and the accessory-side tabs come into contact with each other at two positions in total and one of them is located at the third tab on the accessory-side, the contact position of the body-side tab to the third tab on the accessory-side is located near a second side end thereof and erroneous attachment prevention function is provided near the second side end in the third tab on the accessory-side.

Description

  The present invention relates to an accessory-side mount and a body-side mount having a bayonet structure for detachably coupling a camera accessory and a camera body, and a camera accessory and a camera body to which these mounts are attached.

  2. Description of the Related Art There are known camera accessories and camera bodies configured to detachably couple camera accessories such as interchangeable lenses and camera bodies using a bayonet structure mounting system. In such a camera accessory or camera body, the camera accessory and the camera body can be coupled only when the mount of the camera accessory is inserted into the mount of the camera body at a normal insertion / extraction phase. However, when an attempt is made to insert at a phase other than the normal insertion / extraction phase, the three claws of the camera accessory mount and the three claws of the camera body mount come into contact with each other at least at one location. Coupling with the camera body is prevented (see Patent Document 1).

JP-A-2005-70712

  In the photographic lens that is the camera body and the camera accessory described in the above-mentioned patent document, if there is only one contact point between the claw of the photographic lens mount and the claw of the camera body mount, There is a risk that the other two claws that do not come into contact with each other on the camera body side. In this state, if the user tries to rotate the photographing lens with respect to the camera body in order to couple the photographing lens to the camera body, the photographing lens is allowed to rotate with respect to the camera body. There is a risk that. In this case, if the user screws the photographing lens while the photographing lens is inclined with respect to the camera body, the photographing lens may be erroneously attached while being tilted with respect to the camera body.

(1) A camera accessory according to a first aspect of the present invention is an accessory that is detachably coupled to a camera body, and the first to third claws that are spaced apart along the circumferential direction are circular. In a camera accessory that has a bayonet-structured accessory-side mount that protrudes from the inside to the outside of the circumference, the accessory-side mount has a normal insertion / extraction phase with respect to the camera body-side mount provided on the camera body. When inserted, the first to third claws are not brought into contact with the three camera body side claws of the camera body side mount, and insertion into the camera body side mount is permitted. When the camera is inserted at a phase other than the above, at least two claws of the first to third claws and at least two claws of the camera body side claws come into contact with each other. Insertion into the body-side mount is prohibited, the first to third claws have different lengths extending in the circumferential direction, and the first claws have the longest length extending in the circumferential direction. The first to third claws are rotated to rotate the first to third claws along the circumferential direction in order to couple the accessory-side mount inserted at the regular insertion / extraction phase with the camera body-side mount. A first side end facing in the direction and a second side end facing in a direction opposite to the rotation direction, the first claw and one of the second and third claw When the nail is in contact with the two claws of the camera body side nail, and the total number of contact points is two, the contact point on the first nail exists near the second side end. It is characterized by doing.
(2) A camera accessory according to a second aspect of the present invention is an accessory that is detachably coupled to the camera body, and the first to third claws that are spaced apart from each other in the circumferential direction are circular. In a camera accessory that has a bayonet-structured accessory-side mount that protrudes from the inside to the outside of the circumference, the accessory-side mount has a normal insertion / extraction phase with respect to the camera body-side mount provided on the camera body. When inserted, the first to third claws are not brought into contact with the three camera body side claws of the camera body side mount, and insertion into the camera body side mount is permitted. When the camera is inserted at a phase other than the above, at least two claws of the first to third claws and at least two claws of the camera body side claws come into contact with each other. Insertion into the body side mount is prohibited, and the first claw has the camera body upright when the accessory side mount inserted at the normal insertion / extraction phase is coupled with the camera body side mount. When the vertical position is rotated approximately 90 degrees from the horizontal position, it overlaps with the camera body side claw located at the uppermost position, and the first to third claws are attached to the accessory side mount inserted at the regular insertion / extraction phase. The first side end facing the rotation direction for rotating the first to third claws along the circumferential direction in order to couple with the camera body side mount, and the direction opposite to the rotation direction. A first side claw and one of the second and third claws abutting against the two claws of the camera body side claw, the second claw If there are two places in total, the contact points on the first nail It is characterized in that present in the second side edge vicinity.
(3) The accessory-side mount according to the invention of claim 12 is provided in the camera accessory according to any one of claims 1 to 11.
(4) A camera body according to a thirteenth aspect of the present invention is a camera body to which camera accessories are detachably coupled, and is arranged in a first to first positions spaced apart along the periphery of a circular opening of the camera body. In a camera body having a bayonet-structured body-side mount in which the third claw protrudes from the outside to the inside of the circumference of the opening, the body-side mount is a genuine accessory-side mount provided on the camera accessory The insertion of the accessory-side mount is permitted without any of the first to third claws coming into contact with the three accessory-side claws of the accessory-side mount. When the insertion is attempted at a phase other than, the access is made by contacting at least two claws of the first to third claws and at least two claws of the accessory side claw. The insertion of the sari-side mount is prohibited, and the first claw is located at the uppermost position when the camera body is in the horizontal position with the camera body upright, and the first to third claws are A first side end facing the rotation direction for rotating the accessory side claw along the circumferential direction of the opening in order to couple the accessory side mount inserted at the insertion / extraction phase with the body side mount; Has a second side end facing in the opposite direction, and the first claw and one of the second and third claws are in contact with the two claws of the accessory side claw And when a total of two contact locations, the contact location in a 1st nail | claw contains the 1st side end vicinity.
(5) The body-side mount according to the invention of claim 21 is provided in the camera body according to any one of claims 13 to 20.
(6) The accessory-side mount according to the invention of claim 23 is provided in the camera accessory of claim 22.

  According to the present invention, it is possible to improve durability while reliably preventing erroneous mounting.

1 is a perspective view schematically showing a lens-interchangeable camera body 1 to which the present invention is applied and a photographing lens 2 that is detachably attached to the camera body 1; FIG. 1 is a perspective view schematically showing the structure of a body-side mount 100 as viewed from the diagonally right front of a camera body 1. FIG. FIG. 3 is a perspective view schematically showing the structure of an accessory side mount 200 as seen from the diagonally left rear of the photographic lens 2. It is a figure explaining the arrangement | positioning position of the control member 262. FIG. 4 is a view showing the positions of body side claws and body side grooves of the body side mount 100 when the body side mount 100 is viewed from the front of the camera body 1. FIG. It is a figure which shows about the position of the accessory side nail | claw and accessory side groove | channel of the accessory side mount 200 when the accessory side mount 200 is seen from the back of the photographic lens 2. FIG. It is a figure which shows the presence or absence (overlapping state) of interference with the body side nail | claw 110-130 and the accessory side nail | claw 210-230. It is a figure which shows the presence or absence (overlapping state) of interference with the body side nail | claw 110-130 and the accessory side nail | claw 210-230. It is the figure which showed typically the state which expand | deployed the body side 1st nail | claw 110 seen from the radial direction outer side along the periphery. It is a figure which shows the change of the engagement state of the accessory side 2nd nail | claw 220 and the body side 2nd nail | claw 120 at the time of mounting | wearing of the taking lens 2, and removal. It is a figure which shows the presence or absence (overlapping state) of interference with the body side nail | claw 110-130 and the accessory side nail | claw 210-230. It is a figure which shows the presence or absence (overlapping state) of interference with the body side nail | claw 110-130 and the accessory side nail | claw 210-230. It is a figure which shows the presence or absence (overlapping state) of interference with the body side nail | claw 110-130 and the accessory side nail | claw 210-230. It is a figure which shows the presence or absence (overlapping state) of interference with the body side nail | claw 110-130 and the accessory side nail | claw 210-230. It is a figure which shows the presence or absence (overlapping state) of interference with the body side nail | claw 110-130 and the accessory side nail | claw 210-230. It is a figure explaining the relationship between the body side mount 100 and the accessory side mount 200 when excessive external force is applied to the taking lens 2 in the same direction as gravity. It is a figure explaining the contact points PD and PU and distance LS when the attitude | position of the camera body 1 is a horizontal position. It is a figure explaining the contact points PD and PU and distance LS when the attitude | position of the camera body 1 is a vertical position. It is a figure explaining the contact points PD and PU and distance LS when the attitude | position of the camera body 1 is a vertical position. It is a figure which shows a modification. It is a figure which shows a modification. It is a figure which shows a modification.

  With reference to FIGS. 1-19, one Embodiment of the accessory for cameras by this invention, an accessory side mount, a camera body, and a body side mount is described. FIG. 1 is a perspective view schematically showing an interchangeable lens type camera body 1 to which the present invention is applied and a photographing lens 2 that is detachably attached to the camera body 1. The camera body 1 is provided with a release button 4, an image sensor 5, and a control circuit 6 that controls each part of the camera body 1. Reference numeral 3 denotes a photographing optical path for guiding a subject image from the photographing lens 2 to the image sensor 5.

  On the front surface of the camera body 1, a body side mount 100 having a bayonet structure for mounting a camera accessory such as a converter lens for changing a focal length, in addition to the photographing lens 2, is provided. An accessory side mount 200 for detachably mounting the photographic lens 2 on the body side mount 100 is provided at the rear of the photographic lens 2. In FIG. 1, detailed shapes of the body side mount 100 and the accessory side mount 200 are not shown. In the present embodiment, the front side (subject side) of the camera body 1 to which the photographing lens 2 is attached is defined as the front side, and the back side of the camera body 1 provided with the imaging element 5 is defined as the rear side. Further, the vertical and horizontal directions of the camera body 1 are defined as shown in FIG. In FIG. 1, the vertical direction of the camera body 1 coincides with the vertical direction. As shown in FIG. 1, the posture of the camera body 1 when the camera body 1 is erected is referred to as a normal posture or a lateral position. The posture of the camera body 1 when the camera body 1 in the horizontal position is rotated 90 degrees clockwise or counterclockwise when viewed from the front is referred to as a vertical position.

--- Body-side mount 100 ---
FIG. 2 is a perspective view schematically showing the structure of the body-side mount 100 as seen from the diagonally right front of the camera body 1. In the body-side mount 100, three claws (body-side claws) spaced apart along the periphery of the circular opening (shooting optical path) of the camera body 1 project from the outer circumference to the inner side. Presents a bayonet structure. Among the three body side claws, the uppermost body side claw is referred to as a body side first claw 110, and in order from the body side first claw 110 to the counterclockwise direction in the drawing, the body side second claw 120, the body This is called the side third claw 130.

  A space between two adjacent body side claws through which the claw of the accessory side mount 200 (accessory side claw) passes when the photographic lens 2 is attached and detached is referred to as a body side groove, as will be described later. The body-side groove between the body-side third claw 130 and the body-side first claw 110 is called a body-side first groove 151, and the body-side second in order from the body-side first groove 151 toward the counterclockwise direction in the drawing. They are referred to as a groove 152 and a body-side third groove 153.

  The front side of the body-side first claw 110 is referred to as a front surface 113, and the side end on the counterclockwise direction facing the body-side second groove 152 is referred to as the first side end 111, and the side facing the body-side first groove 151 is illustrated. The side end on the clockwise side is referred to as the second side end 112. Similarly, the front surface of the body-side second claw 120 is referred to as the front surface 123, the side end facing the body-side third groove 153 is referred to as the first side end 121, and the side end facing the body-side second groove 152 is the first end. Called the two-side end 122. The front surface of the body side third claw 130 is referred to as the front surface 133, the side end facing the body side first groove 151 is referred to as the first side end 131, and the side end facing the body side third groove 153 is the second side end. 132. The first side ends 111, 121, 131 face the mounting direction described later, and the second side ends 112, 122, 132 face the direction opposite to the mounting direction (removal direction) described later. ing.

  Although not shown in FIG. 2, the rear surface of the body-side first claw 110 is referred to as a rear surface and is denoted by reference numeral 114. Similarly, the rear surface of the body-side second claw 120 and the rear surface of the body-side third claw 130 are referred to as rear surfaces, and are denoted by reference numerals 124 and 134, respectively.

  Reference numeral 101 denotes a body-side mount reference surface. The body-side mount reference surface 101 is a donut-shaped flat surface formed toward the front, and comes into contact with an accessory-side mount reference surface 201 of an accessory-side mount 200 (described later) of the photographic lens 2 that has been attached. 2 is a reference surface that defines the position in the front-rear direction. Reference numeral 102 denotes a cylindrical inner peripheral surface of the body-side mount 100, which is fitted with a fitting portion 202 of an accessory-side mount 200, which will be described later, so that the optical axis of the taking lens 2 is the optical axis of the camera body 1 (shooting optical path). 3 is a surface serving as a reference for matching with the third central axis). Reference numeral 161 denotes a pin hole for a pin (not shown) to appear and to be fixed so that the photographic lens 2 that has been attached is fixed so as not to rotate with respect to the camera body 1 (body-side mount 100).

--- Accessory side mount 200 ---
FIG. 3 is a perspective view schematically showing the structure of the accessory-side mount 200 as viewed from the diagonally left rear of the photographic lens 2. Note that the accessory-side mount 200 shown in FIG. 3 shows a state in which the mounting of the photographing lens 2 to the camera body 1 is completed (mounting complete state), that is, a state in which photographing is possible. Therefore, the orientation of the accessory-side mount 200 shown in FIG. 3 in the vertical and horizontal directions coincides with the vertical and horizontal directions of the camera body 1. In the following description, unless otherwise specified, the orientation of the accessory-side mount 200 in the up / down / left / right directions is the orientation in the mounted state.

  The accessory-side mount 200 has a bayonet structure in which three claws (accessory-side claws) that are spaced apart from each other in the circumferential direction protrude from the inner side to the outer side of the circumference. Of the three accessory side claws, the uppermost accessory side claw is referred to as an accessory side first claw 210, and the accessory side second claw 220 and the accessory side in order from the accessory side first claw 210 toward the illustrated clockwise direction. This is called the third claw 230.

  A space between two adjacent accessory-side claws through which the body-side claws pass when the taking lens 2 is inserted and removed is referred to as an accessory-side groove, as will be described later. The accessory-side groove between the accessory-side first claw 210 and the accessory-side second claw 220 is referred to as an accessory-side first groove 251, and the accessory-side second groove sequentially from the accessory-side first groove 251 toward the illustrated clockwise direction. 252 and called the accessory-side third groove 253.

  The rear surface of the accessory side first claw 210 is called a rear surface 213, the side end facing the accessory side first groove 251 is called a first side end 211, and the side end facing the accessory side third groove 253 is a second side end. Called 212. Similarly, the rear surface of the accessory-side second claw 220 is referred to as a rear surface 223, the side end facing the accessory-side second groove 252 is referred to as the first side end 221, and the side end facing the accessory-side first groove 251 is the first end. Called the two side end 222. The rear surface of the accessory side third claw 230 is called a rear surface 233, the side end facing the accessory side third groove 253 is called a first side end 231, and the side end facing the accessory side second groove 252 is a second side end. Call 232. The first side ends 211, 221, and 231 face the mounting direction described later, and the second side ends 212, 222, and 232 face the direction opposite to the mounting direction (removal direction) described later. ing.

  Although not shown in FIG. 3, the front surface of the accessory-side first claw 210 is referred to as a front surface, and is denoted by reference numeral 214. Similarly, the front surface of the accessory-side second claw 220 and the front surface of the accessory-side third claw 230 are referred to as the front surface, and are denoted by reference numerals 224 and 234, respectively.

  Reference numeral 201 denotes an accessory-side mount reference surface. The accessory-side mount reference surface 201 is a donut-shaped flat surface formed toward the rear, and comes into contact with the body-side mount reference surface 101 when the mounting is completed. Reference numeral 202 denotes a fitting portion that is fitted to the inner peripheral surface 102 of the body-side mount 100 and serves as a reference for making the optical axis of the photographing lens 2 coincide with the optical axis of the camera body 1 (the central axis of the photographing optical path 3). This is a cylindrical part. Reference numeral 261 denotes a pin hole that protrudes and protrudes from the pin hole 161 of the body-side mount 100 in order to fix the mounted taking lens 2 so as not to rotate with respect to the camera body 1 (body-side mount 100). A pin (not shown) is inserted.

  Although not shown in FIG. 3, as shown in FIG. 4, the camera body 1 (body side mount) is attached to the front side of the accessory side second claw 220 in the vicinity of the second side end 222 when the photographic lens 2 is attached or detached. 100) is provided with a regulating member 262 for regulating the rotation range of the taking lens 2 (accessory side mount 200). The restriction of the rotation range by the restriction member 262 will be described in detail later. The restriction member 262 is, for example, a headed pin that is screwed from the outside in the radial direction of the accessory side mount 200.

--- Positions of body side claws and body side grooves ---
FIG. 5 is a diagram illustrating the positions of the body-side claws and the body-side grooves of the body-side mount 100 when the body-side mount 100 is viewed from the front of the camera body 1. The arrangement position of the body side claw is expressed as follows in the counterclockwise angle with respect to the 3 o'clock direction when the body side mount 100 is viewed from the front of the camera body 1. The body-side first claw 110 exists in the range of 76 degrees to 130 degrees. The body-side second claw 120 exists in the range of 177.5 degrees to 226 degrees. The body side third claw 130 exists in the range of 304.5 degrees to 15 degrees (375 degrees).

  When the size of each body side claw 110 to 130 is expressed by an angle range along the periphery of the circular opening of the body side mount 100, the body side first claw 110 is 54 degrees, and the body side second claw 120 is 48 degrees. It is 5 degrees, and the body side third claw 130 is 70.5 degrees. Similarly, when the size of each of the body side grooves 151 to 153 is represented by an angle range along the periphery of the circular opening of the camera body 1, the body side first groove 151 is 61 degrees, and the body side second groove 152 is It is 47.5 degrees, and the body side third groove 153 is 78.5 degrees.

  In FIG. 5, 7 is a mark indicating the position of the index provided on the camera body 1. This index serves as a mark when the photographic lens 2 is attached to the camera body 1, and its position is opposite to the 3 o'clock direction when the body side mount 100 is viewed from the front of the camera body 1. The angle in the clockwise direction is 90 degrees.

--- About the position of accessory side claw and accessory side groove ---
FIG. 6 is a diagram illustrating the positions of the accessory side claw and the accessory side groove of the accessory side mount 200 when the accessory side mount 200 is viewed from the rear side of the photographing lens 2. When the accessory-side mount 200 in the above-mentioned mounting completion state of the photographic lens 2 is viewed from the rear of the photographic lens 2, the accessory-side claw disposition position is expressed by a clockwise angle with respect to the 9 o'clock direction. It becomes like this. The accessory side 1st nail | claw 210 exists in the range of 56.5 degree | times to 115 degree | times. The accessory-side second claw 220 exists in the range of 172.5 degrees to 214.5 degrees. The accessory-side third claw 230 exists in the range of 267.5 degrees to 343.5 degrees.

  When the length extending in the circumferential direction of the accessory-side mount 200 of each accessory-side claw 210 to 230 is represented by an angular range along the circumferential direction of the accessory-side mount 200, the accessory-side first claw 210 has 58. 5 degrees, the accessory-side second claw 220 is 42 degrees, and the accessory-side third claw 230 is 76 degrees. Similarly, when the size of each accessory side groove 251 to 253 is expressed by an angle range along the circumferential direction of the accessory side mount 200, the accessory side first groove 251 is 57.5 degrees, and the accessory side second groove 252 is provided. Is 53 degrees, and the accessory-side third groove 253 is 73 degrees.

  In FIG. 6, 8 is a mark indicating the position of the index provided on the photographic lens 2. This index serves as a mark when the photographic lens 2 is mounted on the camera body 1, and when the accessory side mount 200 in the above-described mounting completion state of the photographic lens 2 is viewed from behind the photographic lens 2. The angle in the clockwise direction with respect to the 9 o'clock direction is 130.5 degrees. This angle corresponds to an angle obtained by adding 90 ° to a mounting angle 40.5 ° described later.

  As described above, the restricting member 262 is provided in front of the accessory-side second claw 220 in the vicinity of the second-side end 222. That is, the regulating member 262 has the shortest length extending in the circumferential direction of the accessory-side mount 200 (the narrowest angle range along the circumferential direction of the accessory-side mount 200) is near the accessory-side second claw 220. Is provided.

--- Mounting the photographic lens 2 to the camera body 1 ---
The photographic lens 2 configured as described above is attached to the camera body 1 as follows. The rotational position of the photographic lens 2 relative to the camera body 1 in the state where the axis extending in the front-rear direction and the optical axis of the photographic lens 2 coincide with the center of the photographic optical path 3 of the camera body 1 is simply referred to below. This is called the insertion / extraction phase. The axis extending in the front-rear direction of the center of the photographing optical path 3 of the camera body 1 and the optical axis of the photographing lens 2 are made to coincide with each other, and the rotation position of the index provided on the photographing lens 2 and the index provided on the camera body 1 , The accessory side mount reference surface 201 and the body side mount reference surface 101 come into contact with each other without the body side claws 110 to 130 interfering with the accessory side claws 210 to 230 as shown in FIG. The accessory side mount 200 can be inserted into the body side mount 100. The insertion / extraction phase at this time is called a normal insertion / extraction phase. FIG. 7 is a diagram showing the presence / absence (overlapping state) of interference between the body side claws 110 to 130 and the accessory side claws 210 to 230. The accessory side claws are schematically illustrated by fan-shaped figures. Yes.

  When the accessory-side mount 200 is inserted into the body-side mount 100 at the normal insertion / extraction phase, the accessory-side first claw 210 passes from the front to the rear of the body-side first groove 151, and the accessory-side second claw 220 is the body-side second. The accessory-side third claw 230 passes from the front to the rear of the body-side third groove 153. Similarly, when the accessory-side mount 200 is inserted into the body-side mount 100 at the normal insertion / extraction phase, the body-side first claw 110 passes from the back to the front of the accessory-side first groove 251 (not labeled in FIG. 7). The body-side second claw 120 passes from the back to the front of the accessory-side second groove 252 (not labeled in FIG. 7), and the body-side third claw 130 passes through the accessory-side third groove 253 (in FIG. 7). Passes from the back to the front (not marked).

  After the accessory-side mount 200 is inserted into the body-side mount 100 at the normal insertion / extraction phase, when the photographing lens 2 is rotated counterclockwise when viewed from the front of the camera body 1, the accessory-side first claw 210 is moved to the body-side first. The accessory side second claw 220 enters the rear side of the body side second claw 120 and the accessory side third claw 230 enters the rear side of the body side third claw 130. In this way, when the photographing lens 2 is rotated counterclockwise when viewed from the front of the camera body 1, as shown in FIG. 8, when the lens 2 is rotated 40.5 degrees from the normal insertion / extraction phase, the regulating member 262 is rotated. Comes into contact with the second side end 122 of the body-side second claw 120, and the counterclockwise rotation is restricted. As described above, when the photographing lens 2 is rotated 40.5 degrees counterclockwise from the normal insertion / extraction phase, the accessory side mount 200 is coupled to the body side mount 100 (coupling between the accessory side claw and the body side claw). Is completed), the mounting of the taking lens 2 is completed. The rotation angle (40.5 degrees) of the photographing lens 2 from the normal insertion / extraction phase to the phase where the mounting of the photographing lens 2 is completed is referred to as a mounting angle. The counterclockwise rotation direction described above is also referred to as a mounting direction.

  When the mounting of the photographic lens 2 is completed, the position of the pin hole 261 of the accessory side mount 200 overlaps the position of the pin hole 161 of the body side mount 100. Then, a pin (not shown) that appears and disappears from the pin hole 161 of the body side mount 100 is inserted into the pin hole 261.

--- When removing the mounted taking lens 2 from the camera body 1 ---
In the case of removing the mounted taking lens 2 from the camera body 1, the following is performed. First, the above-described pin is removed from the pin hole 261 by pressing a button (not shown) provided on the camera body 1. In this state, when the photographing lens 2 is rotated clockwise to the normal insertion / extraction phase when viewed from the front of the camera body 1, the connection between the accessory side claw and the body side claw is released. When the photographing lens 2 is rotated to the normal insertion / extraction phase, the restricting member 262 comes into contact with the first side end 111 of the body-side first claw 120 and the clockwise rotation is restricted. That is, the state returns to the state shown in FIG. At the regular insertion / removal position, as described above, the body side claws 110 to 130 and the accessory side claws 210 to 230 do not interfere with each other, so that the photographing lens 2 can be removed in front of the camera body 1. The clockwise rotation direction described above is also referred to as a removal direction.

--- About the connection state of the accessory side nail and the body side nail ---
FIG. 9 is a diagram schematically showing a state in which the body-side first claw 110 is deployed along the circumference as seen from the outside in the radial direction. In the vicinity of the second side end 112 of the body side first claw 110, the accessory side first claw 210 can smoothly wrap around the rear side of the body side first claw 110 when the taking lens 2 is mounted. In addition, a tapered surface 117 having a rear surface 114 side formed on a taper is provided. In the vicinity of the second side end 112 of the body-side first claw 110, a contact portion 115 that is a surface perpendicular to the front-rear direction of the body-side mount 100 is provided following the tapered surface 117. A spring 116 is provided on the rear surface 114 adjacent to the contact portion 115.

  The spring 116 comes into contact with the front surface 214 (not shown in FIG. 9) of the accessory-side first claw 210 that has entered the rear side of the body-side first claw 110 and presses it backward, so that the accessory-side mount reference surface This is an elastic member for keeping 201 and the body-side mount reference surface 101 in contact with each other. For example, when the photographing lens 2 is attached to the camera body 1 when an external force is applied to the photographing lens 2 that has been attached, and the photographing lens 2 tries to tilt against the urging force of the spring 116, This is a part that contacts the front surface 214 of the first claw 210 and restricts the movement of the accessory-side first claw 210 forward. When the accessory-side mount reference surface 201 and the body-side mount reference surface 101 are in contact (contact) with each other due to the biasing force of the spring 116, the contact portion 115 is the front surface 214 of the accessory-side first claw 210. And slightly separated.

  The body side second claw 120 and the body side third claw 130 have the same structure. That is, in the vicinity of the second side end 122 of the body side second claw 120, a tapered surface 127 having a rear surface 124 side formed on a taper is provided. In the vicinity of the second side end 122 of the body-side second claw 120, a contact portion 125 that is a surface perpendicular to the front-rear direction of the body-side mount 100 is provided following the tapered surface 127. A spring 126 is provided on the rear surface 124 adjacent to the contact portion 125. In the vicinity of the second side end 132 of the body side third claw 130, a tapered surface 137 having a rear surface 134 formed on a taper is provided. In the vicinity of the second side end 132 of the body-side third claw 130, a contact portion 135 that is a surface perpendicular to the front-rear direction of the body-side mount 100 is provided following the tapered surface 137. A spring 136 is provided on the rear surface 134 adjacent to the contact portion 135.

  In FIG. 8, the mark 116 a indicates in which phase along the circumferential direction the position where the spring 116 presses the front surface 214 of the accessory-side first claw 210. Similarly, the mark denoted by reference numeral 126a indicates in which phase along the circumferential direction the position where the spring 126 presses the front surface 224 of the accessory-side second claw 220 is, and the mark denoted by reference numeral 136a is The phase at which the position where the spring 136 presses the front surface 234 of the accessory side third claw 230 is in the circumferential direction is shown.

  For example, as shown in FIGS. 7 and 8, the contact portion 115 is provided substantially directly above the body-side mount 100. The contact portion 125 is provided at a position separated from the second side end 122 of the body side second claw 120 by the same distance as the distance between the second side end 112 of the body side first claw 110 and the contact portion 115. ing. The contact portion 135 is provided at a position separated from the second side end 132 of the body side third claw 130 by the same distance as the distance between the second side end 112 of the body side first claw 110 and the contact portion 115. ing.

  FIG. 10 is a diagram showing a change in the engagement state between the accessory-side second claw 220 and the body-side second claw 120 when the photographic lens 2 is attached to and detached from the camera body 1 in time series. It is the figure which showed typically the state which expand | deployed the body side 2nd nail | claw 120 seen from the outer side along the periphery. FIG. 10A is a diagram illustrating a state where the accessory-side second claw 220 of the accessory-side mount 200 inserted in the regular insertion / extraction phase passes through the body-side second groove 152. FIG. 10B shows the accessory-side second claw in a state where the accessory-side second claw 220 passes through the body-side second groove 152 and the accessory-side mount reference surface 201 and the body-side mount reference surface 101 are in contact with each other. It is a figure which shows the mode of 220 and the body side 2nd nail | claw 120. FIG.

  Thereafter, when the photographing lens 2 is rotated in the mounting direction, as shown in FIG. 10C, the accessory-side second claw 220 enters the rear side of the body-side second claw 120, and FIG. As shown, the accessory-side second claw 220 moves to the rear of the spring 126, and the accessory-side second claw 220 is urged rearward by the spring 126. When the photographic lens 2 is rotated in the mounting direction by the mounting angle from the normal insertion / extraction position, the restricting member 262 is placed on the second side end 122 of the body-side second claw 120 as shown in FIG. Since it abuts, the rotation of the taking lens 2 in the mounting direction is restricted.

  When the photographic lens 2 is rotated in the detaching direction from the state shown in FIG. 10E in order to remove the photographic lens 2 from the camera body 1, when the photographic lens 2 is rotated by the mounting angle, FIG. As shown in FIG. 3, the restricting member 262 contacts the first side end 111 of the body-side first claw 110, so that the rotation of the taking lens 2 in the removal direction is restricted.

--- In case of trying to insert the photographic lens 2 in a phase other than the normal insertion / extraction phase ---
In the body side mount 100 and the accessory side mount 200 of the present embodiment, when the photographing lens 2 is to be inserted with a phase other than the normal insertion / extraction phase, at least two claws of the body side claws 110 to 130 and the accessory side claw The at least two claws 210 to 230 abut at a total of two or more locations, thereby prohibiting (blocking) insertion of the accessory side mount 200 into the body side mount 100.

  As can be clearly seen from FIG. 7, the rear surface of the accessory-side first claw 210 can be attached even if an attempt is made to mount the photographic lens 2 in a state where the photographic lens 2 is slightly rotated counterclockwise from the normal insertion / extraction phase. 213 is in contact with the front surface 113 of the body side first claw 110, the rear surface 223 of the accessory side second claw 220 is in contact with the front surface 123 of the body side second claw 120, and the rear surface 233 of the accessory side third claw 230 is on the body side. It contacts the front surface 133 of the third claw 130. In this case, when the three claws of the body side claws 110 to 130 and the three claws of the accessory side claws 210 to 230 abut, insertion of the accessory side mount 200 into the body side mount 100 is prohibited. For example, in FIG. 8, it is assumed that the accessory side claws 210 to 230 are located in front of the body side claws 110 to 130.

  From the state described above, when the photographing lens 2 is to be mounted while the photographing lens 2 is further rotated counterclockwise in the drawing, as shown in FIG. 11, the accessory-side second claw 220 has the body-side third groove. The accessory side second claw 220 does not come into contact with the body side claws 110 to 130 because the front side of the accessory side second claw 220 moves. However, the rear surface 213 of the accessory-side first claw 210 contacts the front surface 113 of the body-side first claw 110, and the rear surface 233 of the accessory-side third claw 230 contacts the front surface 133 of the body-side third claw 130. In this case, when the two claws of the body side claws 110 to 130 and the two claws of the accessory side claws 210 to 230 abut, insertion of the accessory side mount 200 into the body side mount 100 is prohibited. Become. In FIG. 11, the number of contact points between the body-side claws 110 to 130 and the accessory-side claws that are hatched is two in total.

  In the state shown in FIG. 11, when the taking lens 2 slightly turns counterclockwise, the rear surface 213 of the accessory-side first claw 210 comes into contact with the front surface 123 of the body-side second claw 120. That is, when the taking lens 2 is slightly rotated counterclockwise in the figure, the contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 become three. On the other hand, when the photographing lens 2 is rotated clockwise from the state shown in FIG. 11, the area of the portion where the rear surface 213 of the accessory-side first claw 210 and the front surface 113 of the body-side first claw 110 abut. And the area of the part which the rear surface 233 of the accessory side 3rd nail | claw 230 and the front surface 133 of the body side 3rd nail | claw 130 contact | abut will increase.

  Therefore, in the state shown in FIG. 11, the rear surface 213 of the accessory-side first claw 210 is in contact with the front surface 113 of the body-side first claw 110, and the rear surface 233 of the accessory-side third claw 230 is the front surface of the body-side third claw 130. In this case, the area of the abutting portion is the smallest when the abutting portion 133 is in contact with only the two abutting portions. When the body-side mount 100 is viewed from the front of the camera body 1, the contact portion between the rear surface 213 of the accessory-side first claw 210 and the front surface 113 of the body-side first claw 110 in the insertion / extraction phase shown in FIG. The angle range is 11 degrees.

  As will be described later, the two claws of the body-side claws 110 to 130 and the two claws of the accessory-side claws 210 to 230 abut at a total of two locations, so that the accessory-side mount 200 has the body-side mount 100. There are other situations where the insertion of is prohibited. However, since the two claws of the body side claws 110 to 130 and the two claws of the accessory side claws 210 to 230 abut at two places in total, insertion of the accessory side mount 200 into the body side mount 100 is prohibited. Among the two contact locations, the contact location with the smaller contact area has the smallest contact area in the state shown in FIG. 11 and in FIG. In this state, the photographing lens 2 is rotated counterclockwise by 11 degrees (not shown).

  In the state where the photographic lens 2 is rotated 11 degrees counterclockwise from the state shown in FIG. 11, instead of the rear surface 213 of the accessory side first claw 210 and the front surface 113 of the body side first claw 110 not contacting each other, The rear surface 213 of the accessory side first claw 210 contacts the front surface 123 of the body side second claw 120. Note that the other contact portion is a portion where the rear surface 233 of the accessory-side third claw 230 contacts the front surface 133 of the body-side third claw 130. When the contact portion between the rear surface 213 of the accessory-side first claw 210 and the front surface 123 of the body-side second claw 120 is represented by an angle range when the body-side mount 100 is viewed from the front of the camera body 1, FIG. It is 11 degrees as in the state shown.

  That is, also in this case, there are two contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 in total. In this state, the rear surface 213 of the accessory-side first claw 210 and the front surface 123 of the body-side second claw 120 are in contact with each other, and the rear surface 233 of the accessory-side third claw 230 and the front surface 133 of the body-side third claw 130 are in contact with each other. In the case where there are two contact portions in contact, the area of the contact portion is the smallest.

  That is, the area of the contact portion between the rear surface 213 of the accessory-side first claw 210 and the front surface 113 of the body-side first claw 110 shown in FIG. Since the two claws 210 to 230 are in contact with each other at a total of two locations, the area is the smallest in a state where the insertion of the accessory side mount 200 into the body side mount 100 is prohibited. Similarly, the contact portion between the rear surface 213 of the accessory-side first claw 210 and the front surface 123 of the body-side second claw 120 when the photographic lens 2 is rotated 11 degrees counterclockwise in the drawing from the state shown in FIG. Since the two claws of the body side claws 110 to 130 and the two claws of the accessory side claws 210 to 230 are in contact with each other at a total of two locations, the accessory side mount 200 is prohibited from being inserted into the body side mount 100. In the state where it is done, the area is the smallest. The insertion / removal phase shown in FIG. 11 and the insertion / removal phase when the photographic lens 2 is rotated 11 degrees counterclockwise from the state shown in FIG. 11 are referred to as a specific insertion / removal phase.

  As described above, when the photographic lens 2 is rotated counterclockwise from the state shown in FIG. 11, the rear surface 213 of the accessory side first claw 210 is moved to the front surface 113 of the body side first claw 110 and the body side second claw 120. The rear surface 233 of the accessory-side third claw 230 contacts the front surface 133 of the body-side third claw 130. That is, the total number of contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 is three.

  Further, when the photographic lens 2 is rotated counterclockwise in the figure, as described above, the rear surface 213 of the accessory-side first claw 210 is obtained when the photographic lens 2 is rotated 11 degrees counterclockwise in the figure from the state shown in FIG. And the front side 113 of the body-side first claw 110 do not come into contact with each other, so the total number of contact points between the body-side claw 110-130 and the accessory-side claw 210-230 is two.

  Further, when the photographing lens 2 is rotated counterclockwise in the figure, the state shown in FIG. 12 is obtained.

  As can be clearly seen from FIG. 12, when the taking lens 2 is slightly rotated counterclockwise from the state shown in FIG. 12, the rear surface 223 of the accessory-side second claw 220 becomes the front surface 133 of the body-side third claw 130. Comes to abut. That is, the total number of contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 is three. When the photographing lens 2 further rotates counterclockwise in the figure from this state, the rear surface 233 of the accessory-side third claw 230 comes into contact with the front surface 113 of the body-side first claw 110. That is, the total number of contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 is four.

  When the photographic lens 2 further rotates counterclockwise in the drawing, the rear surface 233 of the accessory side third claw 230 does not come into contact with the front surface 133 of the body side third claw 130, and then the rear surface 213 of the accessory side first claw 210 It does not contact the front surface 123 of the body side second claw 120. That is, as shown in FIG. 13, there are two contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 in total.

  When the photographic lens 2 is further rotated counterclockwise from the state shown in FIG. 13, the area of the portion where the rear surface 223 of the accessory-side second claw 220 and the front surface 133 of the body-side third claw 130 abut, The area of the portion where the rear surface 233 of the accessory-side third claw 230 and the front surface 113 of the body-side first claw 110 abut is reduced. Therefore, in the state shown in FIG. 13, the rear surface 223 of the accessory-side second claw 220 and the front surface 133 of the body-side third claw 130 come into contact with each other, and the rear surface 233 of the accessory-side third claw 230 and the body-side first claw 110 In the case where the front surface 113 comes into contact and there are two contact portions, the case where the area of the contact portion is the largest is shown.

  FIG. 14 is a state in which the photographic lens 2 is further rotated counterclockwise from the state shown in FIG. 13, and the rear surface 223 of the accessory-side second claw 220 and the front surface 133 of the body-side third claw 130 come into contact with each other. In the case where the rear surface 233 of the accessory-side third claw 230 and the front surface 113 of the body-side first claw 110 are in contact with each other so that there are two contact portions, the area of the contact portion is minimized. .

  When the taking lens 2 is slightly rotated counterclockwise from the state shown in FIG. 14, the rear surface 213 of the accessory-side first claw 210 comes into contact with the front surface 133 of the body-side third claw 130. At this time, the total number of contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 is three. From this state, when the photographing lens 2 is further rotated counterclockwise in the drawing, the rear surface 233 of the accessory-side third claw 230 comes into contact with the front surface 123 of the body-side second claw 120. At this time, the total number of contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 is four. If the photographing lens 2 is further rotated counterclockwise in the figure from this state, the rear surface 223 of the accessory-side second claw 220 and the front surface 133 of the body-side third claw 130 do not contact each other as shown in FIG. At this time, the total number of contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 is three.

  When the photographic lens 2 is slightly rotated counterclockwise from the state shown in FIG. 15, the rear surface 223 of the accessory-side second claw 220 comes into contact with the front surface 113 of the body-side first claw 110. The rear surface 233 of the accessory side third claw 230 does not come into contact with the front surface 113 of the body side first claw 110. When the photographing lens 2 is further rotated counterclockwise in the figure, the normal insertion / extraction phase shown in FIG. 7 is restored, and the body side claws 110 to 130 and the accessory side claws 210 to 230 do not contact (interfere).

--- About the accessory side third claw 230 ---
In the case where there are a total of two contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230, and one of them is located on the accessory side third claws 230, FIGS. As shown in FIG. 4, the contact portion of the accessory-side third claw 230 with the body-side claw 110 to 130 is not necessarily the first side end 231 side (that is, the rear surface 233 in the vicinity of the first side end 231). It exists on the second side end 232 side (that is, the rear surface 233 near the second side end 232). That is, when the total number of contact points between the body-side claws 110 to 130 and the accessory-side claws 210 to 230 is two, and one of them is present on the accessory-side third claw 230, an erroneous insertion is made. A blocking function is provided in the vicinity of the second side end 232 in the accessory-side third claw 230. The vicinity of the second side end 232 of the accessory side third claw 230 does not overlap the body side third claw 130 when the photographic lens 2 is attached to the camera body 1 as shown in FIG. It is configured to be located in the side third groove 153. That is, the vicinity of the second side end 232 of the accessory-side third claw 230 directly contributes to fixing the photographic lens 2 to the camera body 1 when the photographic lens 2 is attached to the camera body 1. Absent.

  Further, as described above, when the front surface 234 is pressed by the spring 136 of the body side third claw 130 in the vicinity of the first side end 231 among the accessory side third claws 230, an excessive external force is applied. The front surface 234 contacts the contact portion 135. That is, when the photographic lens 2 is attached to the camera body 1, a force for fixing the photographic lens 2 to the camera body 1 acts mainly in the vicinity of the first side end 231 in the accessory side third claw 230.

  In this manner, the function is shared by the vicinity of the first side end 231 and the vicinity of the second side end 232 along the extending direction of the accessory side third claw 230.

--- About the body side first nail 110 ---
In the case where there are a total of two contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230, and one of them is present on the body side first claws 110, FIGS. 14, the contact portion of the body side first claw 110 with the accessory side claws 210 to 230 is not necessarily the second side end 112 side (that is, the front surface 113 in the vicinity of the second side end 112). The first side end 111 is present (that is, the front surface 113 in the vicinity of the first side end 111). In other words, when the total number of contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 is two, and one of them is present on the body side first claws 110, erroneous insertion A blocking function is provided in the vicinity of the first side end 111 of the body-side first claw 110.

  A spring 116 is provided adjacent to the contact portion 115 in the vicinity of the second side end 112 of the body side first claw 110. That is, the vicinity of the second side end 112 of the body-side first claw 110 has a function of fixing the photographing lens 2 to the camera body 1 when the photographing lens 2 is attached to the camera body 1.

  Thus, the function is shared by the vicinity of the 1st side end 111 and the vicinity of the 2nd side end 112 along the extension direction of the body side 1st nail | claw 110. As shown in FIG.

The camera body 1 and the taking lens 2 configured as described above have the following operational effects.
(1) The three claws of the accessory side claws 210 to 230 are arranged at equal intervals, and the three claws of the body side claws 110 to 130 are arranged at equal intervals. Then, the photographing lens 2 can be attached to the camera body 1 even in a phase other than the normal insertion / extraction phase. Therefore, the size of the three claws of the accessory side claws 210 to 230 is changed, the arrangement interval is changed, the size of the three claws of the body side claws 110 to 130 is changed, and the arrangement interval is changed. Yes. In addition, when the photographing lens 2 is to be inserted with a phase other than the normal insertion / extraction phase, at least two claws of the body side claws 110 to 130 and at least two claws of the accessory side claws 210 to 230 total two or more places. By making contact, the insertion of the accessory side mount 200 into the body side mount 100 is prohibited. For example, if there is only one contact point between the camera accessory mount claws and the camera body mount claws, the other two claws that do not contact the accessory side are between the camera body side claws. There is a risk of getting in. However, in this embodiment, as described above, since the contact points between the body side claws 110 to 130 and the accessory side claws 210 to 230 are two or more in total except for the normal insertion / extraction phase, the camera accessory is used. It is possible to prevent erroneous mounting.

(2) The restricting member 262 contacts the second side end 122 of the body-side second claw 120 and the first side end 111 of the body-side first claw 110 to rotate the photographic lens 2 in the mounting direction and the detaching direction. It was configured to regulate the movement range. Thereby, since the rotation range to the rotation direction and removal direction of the photographic lens 2 can be controlled by one member of simple shape, the manufacturing cost of the body side mount 100 and the accessory side mount 200 can be suppressed.

(3) The regulating member 262 is provided in the vicinity of the side end of the accessory-side second claw 220 having the shortest length extending in the circumferential direction of the accessory-side mount 200. The accessory-side second claw 220 passes through the body-side second groove 152 in the normal insertion / extraction phase, but the angle range along the periphery of the circular opening of the camera body 1 of the body-side second groove 152 is 47.degree. 5 degrees. The mounting angle is 40.5 degrees. Within the angle range (47.5 degrees) in which the body-side second groove 152 extends, the regulating member 262 has the second-side end 122 of the body-side second claw 120 and the first-side end 111 of the body-side first claw 110. It can be said that the range that can be moved between the two corresponds to the mounting angle. Therefore, by providing the regulating member 262 in the vicinity of the side end of the accessory-side second claw 220 having the shortest length extending in the circumferential direction of the accessory-side mount 200, the mount including the body-side mount 100 and the accessory-side mount 200 is mounted. The mounting angle of the system will be defined. In addition, since the mounting angle is defined as follows, it can be said that the sizes of the body-side second groove 152 and the accessory-side second claw 220 are determined according to the mounting angle. By configuring in this way, a rational structure can be realized, and a useless part can be eliminated, contributing to weight reduction.

  The smaller the mounting angle is, the easier the mounting is, the amount of friction between the electrical contacts (not shown) on the camera body 1 side and the photographing lens 2 side can be reduced, and the wear of the electrical contacts caused by the replacement of the photographing lens 2 is reduced. be able to. However, if the mounting angle is too small, the engagement between the claws may be inadvertently disengaged, and the photographing lens 2 may easily fall off. On the other hand, in order to provide the springs 116, 126, 136, the contact portions 115, 125, 135, and the tapered surfaces 117, 127, 137, the body-side mount 100 needs to have a certain length in the circumferential direction. Further, in order to allow the accessory side claws 210 to 230 to be sufficiently applied to the springs 116, 126, 136 and the contact portions 115, 125, 135 beyond the tapered surfaces 117, 127, 137, a certain amount of mounting is required. Takes an angle. In the present embodiment, the mounting angle is 40.5 degrees based on these.

(4) Although the front side (subject side) of the photographic lens 2 is likely to hang down due to the influence of the weight of the photographic lens 2, the accessory side mount reference surface is urged by the biasing force of the springs 116, 126, and 136 in a normal use state. The state where 201 is in contact with the body-side mount reference surface 101 is maintained. However, for example, when the camera body 1 is fixed to a tripod and an external force is applied to the photographic lens 2 in the same direction as gravity, and the state is greater than the biasing force of the spring, for example, when the camera body 1 is in a normal posture, The spring 116 of the uppermost body-side first claw 110 is further bent and the front surface 214 of the accessory-side first claw 210 comes into contact with the contact portion 115 of the body-side first claw 110.

  This state is shown in FIG. In FIG. 16, for convenience of explanation, the gaps between the parts are exaggerated. In this state, the lower side contacts the accessory-side mount reference surface 201 and the body-side mount reference surface 101 at the point PD, and the upper side of the front surface 214 of the accessory-side first claw 210 and the body-side first claw 110 as described above. The contact portion 115 comes into contact with the point PU, and the weight and external force of the photographing lens 2 are supported at these two points. Therefore, the force applied to the two points PD and PU can be reduced by increasing the distance LS between the two points PD and PU in the vertical direction (the direction in which gravity acts) as much as possible.

  Such a state does not occur in a normal photographing state unless an unintended external force is applied. However, it is necessary to consider this situation because the taking lens 2 has a generally cylindrical shape and is easy to touch, and it can be considered that it occurs at a certain frequency assuming various usage situations.

  The contact points PD and PU and the distance LS in each posture of the camera body 1 are shown in FIGS. In FIG. 17, the posture of the camera body 1 is a normal posture (lateral position), the distance LS at this time is LS1, and the contact points PD and PU are PD1 and PU1, respectively. In FIG. 18, the posture of the camera body 1 is a vertical position with the left side of the camera body 1 facing upward, the distance LS at this time is LS2, and the contact points PD and PU are PD2 and PU2, respectively. In FIG. 19, the posture of the camera body 1 is a vertical position with the right side of the camera body 1 facing upward, the distance LS at this time is LS3, and the contact points PD and PU are PD3 and PU3, respectively. A distance LS1 in the horizontal position shown in FIG. 17 and LS2 in the vertical position shown in FIG. 18 are both substantially equal to the diameter of the body-side mount 100. However, the distance LS3 in the vertical position shown in FIG. 19 is shorter than the distances LS1 and LS2.

  Therefore, the force applied to PU3 is larger than PU1 and PU2 if the external force acting on photographic lens 2 is the same.

  Therefore, in the present embodiment, the length of the body side third claw 130 in the circumferential direction is longer than that of the body side first claw 110 and the body side second claw 120. Thereby, the strength of the body side third claw 130 is higher than that of the body side first claw 110 and the body side second claw 120. Further, the length in the circumferential direction of the accessory-side third claw 230 of the accessory-side mount 200 that comes into contact with the contact portion 135 (that is, PU3) in the state where the mounting of the photographing lens 2 is completed is set to the accessory-side first length. It is longer than the one claw 210 and the accessory side second claw 220. Accordingly, the body-side third claw 130 and the accessory-side third claw 230 have sufficient strength. Therefore, even when the posture of the camera body 1 is in the vertical position shown in FIG. There is no problem with the side third claw 130 and the accessory side third claw 230.

  As described above, according to the present embodiment, the effect of reliably prohibiting erroneous insertion at a phase other than the normal insertion / extraction phase, and the accessory side in the state where the photographing lens 2 is mounted after being inserted at the normal insertion / extraction phase are provided. The mount 200 can be combined with the effect of ensuring the strength of the body-side mount 100.

(5) As described above, the function is shared by the vicinity of the first side end 231 and the vicinity of the second side end 232 along the extending direction of the accessory side third claw 230. . Thereby, durability of the accessory side 3rd nail | claw 230 improves. In particular, the accessory-side third claw 230 is a claw on which the above-described PU 3 acts in a vertical position with the right side of the camera body 1 facing upward, and is the claw with the greatest burden. By improving the durability of the accessory-side third claw 230, which is the most burdensome, the durability and reliability of the accessory-side mount 200 itself are improved.

(6) As described above, the function is shared between the vicinity of the first side end 111 and the vicinity of the second side end 112 along the extending direction of the body-side first claw 110. . Thereby, durability of the body side 1st nail | claw 110 improves. In particular, the body-side first claw 110 has a constant load on the spring 116 that is more constantly loaded than the other springs 126 and 136 due to the weight of the photographic lens 2 at the frequently used lateral position of the camera body 1. This is the claw on which the PU1 acts, and the claw that is most frequently burdened. By improving the durability of the body side first claw 110 that is most frequently burdened, the durability and reliability of the body side mount 100 itself is improved.

(7) In the present embodiment, since the contact portion 115 is configured to be provided substantially directly above the body-side mount 100, the above-described LS1 can be lengthened, so that the force applied to the contact point PU1 is reduced. Therefore, the durability of the body-side first claw 110 is improved.
The drooping in front of the photographic lens 2 can be effectively suppressed. In addition, since the body-side first claw 110 is provided so as to be directly above the body-side mount 100, the strength of the contact portion 115 can be sufficiently secured, and the durability of the body-side first claw 110 is improved. . Therefore, durability and reliability of the body side mount 100 itself are improved.

(8) As shown in FIG. 16, the lower portions of the rear surfaces of the body side claws 110 to 130 and the front surfaces of the accessory side claws 210 to 230 are most difficult to hit. Therefore, it is less necessary to make the body side claws 110 to 130 and the accessory side claws 210 to 230 abut at this portion. Therefore, in the present embodiment, for example, as shown in FIG. 5, the largest body-side third groove 153 is located below the body-side mount 100. Therefore, the body side claws 110 to 130 can be rationally arranged.

(9) The accessory side claws 210 to 230 are arranged at the arrangement positions as shown in FIG. 6 for the following reason. The accessory-side first claw 210 that is positioned directly above when the photographing lens 2 is mounted on the camera body 1 in the horizontal position is desirably high in strength and has a long circumferential extension length. Better. However, as described above, since the largest body-side third groove 153 is configured to be positioned below the body-side mount 100, the body-side third groove is inserted when inserted at the regular insertion / extraction phase. The length extending in the circumferential direction of the accessory-side third claw 230 passing through 153 is the longest. Therefore, the accessory-side first claw 210 is configured such that the second length extending in the circumferential direction is long. And the accessory side 2nd nail | claw 220 with few restrictions as mentioned above is comprised so that the length extended in the circumferential direction may become the shortest. Thus, the accessory side nail | claw 210-230 can be rationally arrange | positioned by providing the accessory side nail | claw 210-230.

---- Modified example ---
(1) In the above description, the accessory side claws 210 to 230 are fixed to the main body of the photographing lens 2, and when the photographing lens 2 is attached or detached, the photographing lens 2 itself is attached to or detached from the camera body 1. However, the present invention is not limited to this. For example, the accessory-side claws 210 to 230 are configured to be rotatable with respect to the main body of the photographic lens 2, and after the photographic lens 2 is mounted at a normal insertion / extraction phase, only the accessory-side claws 210 to 230 are rotated in the mounting direction By doing so, the photographic lens 2 may be configured to be attached to the camera body 1.

  FIG. 20 is a diagram illustrating an appearance of an example of the photographic lens 20 in which the accessory side claws 210 to 230 are configured to be rotatable with respect to the main body of the photographic lens 2. The taking lens 20 is provided so as to be rotatable with respect to the lens barrel 21, the lens barrel 21, and the bayonet tube 22 having the accessory side claws 210 to 230, and the bayonet tube 22 to rotate with respect to the lens barrel 21. The operation ring 23 is provided. In FIG. 20 and each figure described below, the same members as those described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 21 is a diagram showing the appearance of the lens barrel 21, and FIG. 22 is a diagram schematically showing the structure of the taking lens 20. As shown in FIG. 21, a fitting groove 21 a into which the operation ring 23 is fitted is provided at the rear part of the barrel 21. At the bottom of the fitting groove 21a, a long hole 21b is provided so that the pin 24 connecting the operation ring 23 and the bayonet tube 22 can be moved. 22 (a) and 22 (d), the operation ring 23 is fitted in the fitting groove 21a of the lens barrel 21, and the operation ring 23 and the bayonet tube 22 are connected by a pin 24. It is connected. Reference numeral 25 denotes a lens. In the photographic lens 20 configured as described above, when the operation ring 23 is rotated with respect to the lens barrel 21, the bayonet tube 22, that is, the accessory side claws 210 to 230 rotate with the operation ring 23 with respect to the lens barrel 21. Move. By using the photographic lens 20 configured in this way, after mounting the photographic lens 20 with a normal insertion / extraction phase, the operation ring 23 is operated to rotate only the bayonet tube 22 in the mounting direction, thereby providing a lens barrel. The photographing lens 20 can be attached to the camera body 1 without rotating the lens 21. In addition, FIG.22 (d) is CC sectional view taken on the line of Fig.22 (a).

(2) In the above description, the photographing lenses 2 and 20 have been described as an example of a camera accessory. However, the present invention is not limited to this, and for example, a converter lens that changes the focal length or a mounting surface of the photographing lens. Various camera accessories having an accessory-side mount 200 that can be coupled to the body-side mount 100, such as an adapter that changes the distance from the imaging surface to the imaging surface, may be used.

(3) In the above description, the restricting member 262 is a headed pin attached to the accessory side mount 200, but other members are not attached. For example, the restricting member 262 is located near the second side end 222. You may make it form in such a shape. That is, for example, when the accessory-side mount 200 is a resin injection-molded product, the vicinity of the second side end 222 may be injection-molded so as to have a shape like the regulating member 262.

(4) In the above description, the body side mount 100 may be provided on the photographing lens 2, and the accessory side mount 200 may be provided on the camera body 1.
(5) You may combine each embodiment and modification which were mentioned above, respectively.

  The present invention is not limited to the embodiment described above, and is an accessory that is detachably coupled to the camera body, and is arranged in a first to first manner spaced apart along the circumferential direction. In a camera accessory having a bayonet-structured accessory-side mount in which three claws project from the inside to the outside of the circumference, the accessory-side mount is connected to the camera body-side mount provided on the camera body. When inserted in the normal insertion / extraction phase, the first to third claws are not in contact with the three camera body side claws of the camera body side mount, and insertion into the camera body side mount is permitted. When an insertion is attempted at a phase other than the normal insertion / extraction phase, at least two claws of the first to third claws and at least two claws of the camera body side claw come into contact with each other. Thus, the first to third claws have different lengths extending in the circumferential direction, and the first claws have different lengths extending in the circumferential direction. The longest first to third claws rotate the first to third claws along the circumferential direction in order to couple the accessory-side mount inserted at the regular insertion / extraction phase with the camera body-side mount. It has a first side end facing the rotation direction and a second side end facing the direction opposite to the rotation direction, and is either the first claw or the second and third claw When one nail abuts with two claws of the camera body side nail and the total number of abutting locations is two, the abutting location on the first nail is near the second side end. Camera accessories of various structures, and the various structures provided in the camera accessories. It is intended to include Sesari side mount.

  Further, the present invention is not limited to the above-described embodiment, and is an accessory that is detachably coupled to the camera body, and is arranged in a first to first manner spaced apart along the circumferential direction. In a camera accessory having a bayonet-structured accessory-side mount in which three claws project from the inside to the outside of the circumference, the accessory-side mount is connected to the camera body-side mount provided on the camera body. When inserted in the normal insertion / extraction phase, the first to third claws are not in contact with the three camera body side claws of the camera body side mount, and insertion into the camera body side mount is permitted. When an insertion is attempted at a phase other than the normal insertion / extraction phase, at least two claws of the first to third claws and at least two claws of the camera body side claw come into contact with each other. Is prohibited from being inserted into the camera body side mount, and when the accessory side mount inserted at the normal insertion / extraction phase is coupled with the camera body side mount, the camera body is positioned upright. The upper nail overlaps with the uppermost camera body side nail when the vertical position is rotated approximately 90 degrees from the horizontal position, and the first to third nail is the accessory side inserted at the normal insertion / extraction phase. A first side end facing the rotation direction for rotating the first to third claws along the circumferential direction to couple the mount to the camera body side mount, and in a direction opposite to the rotation direction The first claw and one of the second and third claws are in contact with the two claws of the camera body side claw, If there are two contact points in total, the first nail That contact portion, the camera accessory of various structures, characterized in that present in the second near the rear end, and is intended to include accessory side mount various structures provided in the accessory for this camera.

  Further, the present invention is not limited to the above-described embodiment, and is a camera body to which camera accessories are detachably coupled, and is spaced apart along the periphery of the circular opening of the camera body. In a camera body having a bayonet-structured body-side mount in which the first to third claws provided project from the outer circumference to the inner side of the opening, the body-side mount is provided in a camera accessory. When the accessory-side mount is inserted at the normal insertion / extraction phase, the accessory-side mount can be inserted without any of the first to third claws coming into contact with the three accessory-side claws of the accessory-side mount. However, when it is attempted to be inserted at a phase other than the normal insertion / extraction phase, at least two claws of the first to third claws and at least two claws of the accessory side claw come into contact with each other. Thus, the insertion of the accessory side mount is prohibited, and the first claw is located at the uppermost position when the posture of the camera body is set to the horizontal position with the camera body upright, and the first to third claws are A first side end facing the turning direction for turning the accessory-side claw along the circumferential direction of the opening in order to couple the accessory-side mount inserted at the normal insertion / extraction phase with the body-side mount; A second side end facing in a direction opposite to the direction, and the first claw and one of the second and third claws are in contact with the two claws of the accessory side claw. And when there are two contact points in total, the contact points on the first claw include the vicinity of the first side end and various structures of the camera body, It includes body-side mounts of various structures provided on the camera body.

DESCRIPTION OF SYMBOLS 1 Camera body 2,20 Shooting lens 3 Shooting optical path 100 Body side mount 110 Body side 1st claw 115,125,135 Contact part 116,126,136 Spring 120 Body side 2nd claw 130 Body side 3rd claw 200 Accessory side Mount 210 Accessory side first claw 220 Accessory side second claw 262 Restriction member 230 Accessory side third claw

Claims (23)

A bayonet that is detachably coupled to a camera body and has first to third claws spaced apart from each other in the circumferential direction and projecting from the inside to the outside of the circumference In camera accessories with a structure accessory side mount,
When the accessory side mount is inserted at a normal insertion / extraction phase with respect to the camera body side mount provided on the camera body, all of the first to third claws are mounted on the camera body side mount. When the insertion into the camera body side mount is permitted without being in contact with the three camera body side claws, and the insertion is attempted at a phase other than the normal insertion / extraction phase, the first to third The at least two claws of the nail and the at least two claws of the camera body side nail are in contact with each other, and insertion into the camera body side mount is prohibited.
The first to third claws have different lengths extending in the circumferential direction,
The first claw has the longest length extending in the circumferential direction,
The first to third claws are arranged along the circumferential direction in order to connect the accessory-side mount inserted at the regular insertion / extraction phase with the camera body-side mount. A first side end facing the turning direction to be rotated, and a second side end facing the direction opposite to the turning direction;
The first nail and one of the second and third nails are in contact with two nails of the camera body side nail, and the total number of contact points is two. In this case, the camera accessory is characterized in that the contact portion of the first claw is present in the vicinity of the second side end. A bayonet that is detachably coupled to a camera body and has first to third claws spaced apart from each other in the circumferential direction and projecting from the inside to the outside of the circumference In camera accessories with a structure accessory side mount,
When the accessory side mount is inserted at a normal insertion / extraction phase with respect to the camera body side mount provided on the camera body, all of the first to third claws are mounted on the camera body side mount. When the insertion into the camera body side mount is permitted without being in contact with the three camera body side claws, and the insertion is attempted at a phase other than the normal insertion / extraction phase, the first to third The at least two claws of the nail and the at least two claws of the camera body side nail are in contact with each other, and insertion into the camera body side mount is prohibited.
The first claw has a posture in a lateral position in which the posture of the camera body is set upright when the accessory-side mount inserted at the regular insertion / extraction phase is coupled with the camera body-side mount. When overlapped with the uppermost nail on the camera body when the vertical position is rotated approximately 90 degrees from
The first to third claws are arranged along the circumferential direction in order to connect the accessory-side mount inserted at the regular insertion / extraction phase with the camera body-side mount. A first side end facing the turning direction to be rotated, and a second side end facing the direction opposite to the turning direction;
The first claw and one of the second and third claws are in contact with the two claws of the camera body side claw, and there are a total of two contact points. In this case, the camera accessory is characterized in that the contact portion of the first claw is present in the vicinity of the second side end. The camera accessory according to claim 1,
The first claw has a posture in a lateral position in which the posture of the camera body is set upright when the accessory-side mount inserted at the regular insertion / extraction phase is coupled with the camera body-side mount. A camera accessory characterized in that the camera accessory overlaps with the camera body side claw located at the uppermost position when the vertical position is rotated approximately 90 degrees from the top. The camera accessory according to claim 2,
The first to third claws have different lengths extending in the circumferential direction,
The camera accessory according to claim 1, wherein the first claw has the longest length extending in the circumferential direction. The camera accessory according to claim 2 or 3,
The part of the first claw where the contact portion exists is inserted at the regular insertion / extraction phase, and then the first to third claws are rotated in the rotation direction to mount the accessory side mount on the camera. A camera accessory characterized in that it does not overlap with the uppermost nail of the camera body when the camera body is in the vertical position until it is coupled to the body side mount. In the accessory for cameras as described in any one of Claims 1-5,
The camera accessory, wherein the first to third claws are fixed to a main body of the camera accessory. In the accessory for cameras as described in any one of Claims 1-5,
The camera accessory according to claim 1, wherein the first to third claws are attached to a body of the camera accessory so as to be rotatable in the circumferential direction. In the accessory for cameras as described in any one of Claims 1-7,
When the accessory side claw is rotated in the first rotation direction along the circumferential direction in order to couple the accessory side mount inserted at the regular insertion / extraction phase with the body side mount, and When the accessory side claw is rotated in the second rotation direction along the circumferential direction in order to release the connection of the accessory side mount with the body side mount, the camera body side claw side An accessory for a camera, further comprising a restricting member that restricts a rotation range in the first and second rotation directions by coming into contact with an end. The camera accessory according to any one of claims 1 to 8,
The camera accessory according to claim 1, wherein the regulating member is provided in the vicinity of a claw having a shortest length extending in the circumferential direction among the first to third claws. In the camera accessory according to any one of claims 1 to 9,
The first to third claws are expressed by a clockwise angle with respect to the direction of 9 o'clock when the accessory side mount coupled to the body side mount is viewed from the rear of the accessory. , Nail in the range of 56.5 to 115 degrees, nail in the range of 172.5 to 214.5 degrees, and nail in the range of 267.5 to 343.5 degrees A camera accessory characterized by comprising. The camera accessory according to claim 10,
When the accessory side mount inserted at the regular insertion / extraction phase is coupled to the body side mount by rotating the first to third claws by 40.5 degrees along the circumferential direction, the accessory A camera accessory characterized in that a side mount and the body side mount are coupled.   The accessory side mount provided in the accessory for cameras as described in any one of Claims 1-11. A camera body to which a camera accessory is detachably coupled, wherein first to third claws spaced apart along a peripheral edge of the circular opening of the camera body are outside the circumference of the opening. Camera body with a bayonet-structured body-side mount projecting inward from
When the accessory-side mount provided in the camera accessory is inserted at a normal insertion / extraction phase, the first to third claws are all three accessories of the accessory-side mount. Allowing the accessory side mount to be inserted without coming into contact with the side claw, and when trying to insert at a phase other than the regular insertion / extraction phase, at least two claws of the first to third claws , Prohibiting insertion of the accessory side mount by contacting at least two claws of the accessory side claw,
The first claw is located at the uppermost position when the posture of the camera body is a lateral position where the camera body is upright,
The first to third claws rotate the accessory side claws along the circumferential direction of the opening in order to couple the accessory side mount inserted at the regular insertion / extraction phase with the body side mount. A first side end facing in the rotation direction and a second side end facing in a direction opposite to the rotation direction;
When the first nail and one of the second and third nails are in contact with the two nails of the accessory side nail, and the total number of contact points is two The camera body, wherein the contact portion of the first claw includes the vicinity of the first side end. The camera body according to claim 13,
The opening is provided in front of the camera body,
The camera body according to claim 1, wherein a part of the first claw extends in a circumferential direction of the opening through a position directly above the opening when the posture of the camera body is set to the lateral position. The camera body according to claim 14,
When the accessory side claw is rotated along the circumferential direction of the opening in order to couple the accessory side mount inserted at the regular insertion / extraction phase with the body side mount, the first to third claws Further comprising an elastic member that urges the accessory side claw to the back side of the camera body between each and the accessory side claw,
The first to third claws are configured to restrict movement by contacting the accessory side claws when the accessory side claws move to the front side of the camera body against the biasing force of the elastic member. The camera body characterized by being provided. The camera body according to claim 15,
The camera body, wherein the restricting portion provided on the first claw is positioned vertically above the center of the opening when the posture of the camera body is set to the lateral position. The camera body according to any one of claims 14 to 16,
The first to third nails have different lengths extending in the circumferential direction of the opening,
The distance between adjacent claws of the first to third claws is the distance between two claws provided directly below the opening when the posture of the camera body is set to the lateral position. The camera body characterized by the widest range. The camera body according to any one of claims 14 to 15,
When the first to third claws are represented by a counterclockwise angle with respect to the 3 o'clock direction when the opening is viewed from the front when the camera body is in the lateral position, , Nail existing in the range of 76 degrees to 130 degrees, nail existing in the range of 177.5 degrees to 226 degrees, and nail existing in the range of 304.5 degrees to 15 degrees (375 degrees) A camera body characterized by that. The camera body according to claim 18,
When the accessory side claw is rotated by 40.5 degrees along the circumferential direction of the opening in order to couple the accessory side mount inserted at the regular insertion / extraction phase with the body side mount, the accessory side mount And a body-side mount. The camera body according to any one of claims 13 to 19,
When the accessory-side mount according to claim 12 is inserted at a regular insertion / extraction phase, the body-side mount is such that any of the first to third claws is the three accessory-side claws of the accessory-side mount. Without allowing the accessory side mount to be inserted, and when trying to insert at a phase other than the regular insertion / extraction phase, at least two claws of the first to third claws, A camera body, wherein insertion of the accessory side mount is prohibited by contacting at least two claws of the accessory side claw.   The body side mount provided in the camera body as described in any one of Claims 13-20. In the accessory for cameras as described in any one of Claims 1-11,
When inserted in the regular insertion / extraction phase with respect to the body-side mount provided on the camera body according to any one of claims 13 to 19, any of the first to third claws is When the camera body side mount is allowed to be inserted into the camera body side mount without coming into contact with the three camera body side claws, and is inserted at a phase other than the regular insertion / extraction phase, the first An accessory for a camera, wherein at least two claws of the third claw and at least two claws of the camera body side claw come into contact with each other, and insertion into the camera body side mount is prohibited.   The accessory side mount provided in the accessory for cameras of Claim 22.

Images