JP6489358B2 - Tripod mounting mechanism - Google Patents

Description

  The present invention relates to a tripod seat attaching / detaching mechanism that is attached to a photographing apparatus or a lens barrel.

  As a photographing apparatus such as a digital camera, one capable of replacing a photographing lens is known. The photographic lens includes a lens barrel and a lens disposed in the lens barrel. The size and weight of the lens barrel vary depending on the angle of view and focal length of the lens. Generally, a tripod mount can be attached to a lens barrel having a lens having a long focal length, and the lens barrel is attached to the tripod via the tripod mount.

  Patent Document 1 discloses a lens barrel including a first tripod seat unit and a second tripod seat unit that is detachably attached to the first tripod seat unit. In the lens barrel described in Patent Document 1, the first tripod seat unit and the second tripod seat unit have a tripod seat fitting portion that is detachably fitted. The second tripod seat unit has a slit portion and a fixing screw that changes the width of the slit portion to change the gap amount of the portion where the tripod seat fitting portion is fitted. By changing the width of the slit portion with the fixing screw, the first tripod seat unit and the second tripod seat unit are fixed or released.

JP 2003-337275 A

  In the lens barrel of Patent Document 1, in order to narrow the width of the slit portion, the second tripod seat unit is elastically deformed by tightening a fixing screw. Therefore, in order to fix the first tripod seat unit and the second tripod seat unit, it is fixed with a force exceeding the restoring force while resisting the restoring force caused by elastic deformation acting in the direction in which the fixation is released. It is necessary to tighten the screw to narrow the gap between the tripod seat fitting portion, and there is a problem that it takes time to fix.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an easy-to-use tripod seat attachment / detachment mechanism in which the first tripod seat unit can be quickly attached to and detached from the second tripod seat unit. That is.

  The tripod seat attaching / detaching mechanism of the embodiment of the present invention that solves the above-described problems includes a first tripod seat unit and a second tripod seat unit to which the first tripod seat unit is detachably attached. In this configuration, one of the first tripod seat unit and the second tripod seat unit has a first fixing member and a second fixing member screwed into the first fixing member, The other of the first tripod seat unit and the second tripod seat unit has an attachment portion that is pressed against the second fixing member when the first fixing member is fastened to the second fixing member. The first tripod seat unit is fixedly held on the second tripod seat unit by pressing the mounting portion against the second fixing member. For example, the first fixing member is a fixing screw, and the second fixing member is a fixing key.

  According to such a configuration, the first tripod seat unit can be fixed to the second tripod seat unit and the fixation can be released by a simple operation of tightening and loosening the first fixing member (fixing screw). it can. Therefore, the first tripod seat unit can be quickly attached to and detached from the second tripod seat unit.

  The mounting portion is clamped by one of the first tripod seat unit and the second tripod seat unit and the second fixing member when the first fixing member is fastened to the second fixing member. The fixed state may be held.

  The attachment portion may have a male dovetail. In this case, one of the first tripod seat unit and the second tripod seat unit and the second fixing member form a female dovetail groove into which the male dovetail groove is fitted.

  The second fixing member may have an engagement protrusion, and the attachment portion may have a groove portion in which the engagement protrusion can be advanced and retracted and an engagement groove is formed. In this case, the groove portion guides the engaging protrusion in the groove portion when the first tripod seat unit is attached to the second tripod seat unit. The engagement protrusion engages with the engagement groove when guided to the engagement groove of the groove portion, and prevents the first tripod seat unit from being detached from the second tripod seat unit.

  The tripod seat attaching / detaching mechanism may further include a biasing portion that biases the second fixing member toward the mounting portion.

  Moreover, the tripod seat attaching / detaching mechanism of the embodiment of the present invention that solves the above-described problems is configured such that the first tripod seat unit that can be fixed to or attached to the lens barrel and the first tripod seat unit are detachably attached. A second tripod seat unit. In this configuration, one of the first tripod seat unit and the second tripod seat unit has a first fixing member and a second fixing member, and the first tripod seat unit and the second tripod seat unit The other of the tripod seat units has a mounting portion, and when the first fixing member is operated, the second fixing member is pressed against the mounting portion, so that the first tripod seat unit is the second one. It is fixed and held by the tripod seat unit.

Moreover, the tripod seat attaching / detaching mechanism of the embodiment of the present invention that solves the above problems includes a first tripod seat unit that can be fixed to or attached to the photographing apparatus,
And a second tripod seat unit to which the first tripod seat unit is detachably mounted. In this configuration, one of the first tripod seat unit and the second tripod seat unit has a first fixing member and a second fixing member, and the first tripod seat unit and the second tripod seat unit The other of the tripod seat units has a mounting portion, and when the first fixing member is operated, the second fixing member is pressed against the mounting portion, so that the first tripod seat unit is the second one. It is fixedly held by the tripod unit.

  According to the configuration of the embodiment of the present invention, the first tripod seat unit can be quickly attached to and detached from the second tripod seat unit by a simple operation of tightening and loosening the first fixing member, and the easy-to-use tripod seat attaching / detaching mechanism. Will be provided

It is a side view of a lens barrel having a tripod seat attaching / detaching mechanism according to an embodiment of the present invention. It is a rear view of the lens barrel which has the tripod seat attaching / detaching mechanism of the embodiment of the present invention. It is a perspective view of the 1st tripod seat unit of the embodiment of the present invention. It is a disassembled perspective view of the 2nd tripod seat unit of embodiment of this invention. It is sectional drawing of the 2nd tripod seat unit of embodiment of this invention. It is a rear view of the 1st tripod seat unit and the 2nd tripod seat unit of an embodiment of the present invention. It is a rear view of the 1st tripod seat unit and the 2nd tripod seat unit of an embodiment of the present invention. It is the rear view of the 1st tripod seat unit of the embodiment of the present invention, and the 2nd tripod seat unit, and the bottom view of the 1st tripod seat unit. It is sectional drawing of the 1st tripod seat unit and the 2nd tripod seat unit of embodiment of this invention. It is the rear view of the 1st tripod seat unit and the 2nd tripod seat unit in the 1st modification of the embodiment of the present invention, and the bottom view of the 1st tripod seat unit. It is a rear view of the 1st tripod seat unit and the 2nd tripod seat unit in the 2nd modification of an embodiment of the present invention.

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

  FIG. 1A and FIG. 1B are side views of a lens barrel 1 having a tripod seat attaching / detaching mechanism according to an embodiment of the present invention. The tripod mount attaching / detaching mechanism includes a first tripod mount unit 2 and a second tripod mount unit 10. Although aluminum is used for the material of the first tripod seat unit 2 and the second tripod seat unit 10, the present embodiment is not limited to this. For example, the first tripod seat unit 2 and the second tripod seat unit 10 may be made of a light metal material such as an aluminum alloy or a magnesium alloy. The first tripod seat unit 2 is detachably attached to the second tripod seat unit 10. FIG. 1A shows a state where the first tripod seat unit 2 is fixedly held by the second tripod seat unit 10. FIG. 1B shows a state in which the first tripod seat unit 2 is detached from the second tripod seat unit 10. FIG. 2 is a rear view of the lens barrel 1 having the tripod seat attaching / detaching mechanism according to the present embodiment.

  The lens barrel 1 has a cylindrical shape and has a plurality of lenses inside. The lens barrel 1 has a connecting portion 1a at one end in the optical axis direction. The connection unit 1a is detachably connected to a photographing apparatus main body (not shown). Object light from the subject enters from the other end of the lens barrel 1, passes through a plurality of lenses, and exits from one end of the lens barrel 1. Object light emitted from the lens barrel 1 is picked up by a photographing device and converted into an image signal.

  In the following description, the optical axis direction of the lens barrel 1 in FIG. 1 is defined as the front-rear direction, and the connection portion 1a side of the lens barrel 1 in the front-rear direction is defined as the rear. Moreover, the side where the first tripod seat unit 2 of the lens barrel 1 in FIG. 1 is mounted is defined as the lower side, and the opposite side is defined as the upper side. Further, the direction orthogonal to the front-rear direction and the up-down direction is defined as the left-right direction, and the side on which the holding portion 12d of the fixing screw 12 (described later) is provided in the left-right direction is defined as the right side.

  3 (a) and 3 (b) are perspective views of the first tripod seat unit 2 according to the embodiment of the present invention. The first tripod seat unit 2 has a plurality of holes 2 a for screwing to the lens barrel 1. The first tripod seat unit 2 is fixed to the lens barrel portion 1 with screws in a state where the mounting surface 2 b is in contact with a part of the outer peripheral portion of the lens barrel portion 1. A mounting portion 2c to which the second tripod seat unit 10 is attached is formed on the opposite side (lower surface side) of the mounting surface 2b of the first tripod seat unit 2. The attachment portion 2c has a male dovetail shape (ant tenon) extending in the front-rear direction. A groove 2g is formed on the lower surface of the mounting portion 2c. In the groove 2g, an engagement protrusion 15 (described later) of the second tripod seat unit 10 can advance and retract in the front-rear direction. A guide slope 2d and a guide surface 2e for guiding the engagement protrusion 15 are formed on the right side surface in the groove 2g. The groove 2g is formed with an engagement groove 2f by denting the guide surface 2e to the right.

  FIG. 4 is an exploded perspective view of the second tripod seat unit 10 according to the embodiment of the present invention. The second tripod seat unit 10 has a base 11 having an L shape when viewed from the left-right direction. The pedestal 11 has a tripod connecting portion 11a fixed and held on a tripod (not shown) by screwing, and a unit connecting portion 11b that fixes and holds the first tripod seat unit 2. Two screw holes 11c (one screw hole 11c is not shown) are formed in the tripod connecting portion 11a. These screw holes 11c are used to connect the second tripod seat unit 10 to a tripod by screws (not shown). The unit connecting part 11b has a thinned part 11d. Through holes 11e and 11f are formed coaxially on the left and right side surfaces of the thinned portion 11d.

  The fixed key 13 and the compression spring 14 are accommodated in the lightening portion 11d of the unit connection portion 11b. The fixed key 13 is provided with a through hole penetrating in the left-right direction, and a female screw portion 13b is formed in the through hole.

  The fixing key 13 is screwed with the fixing screw 12 in a state of being accommodated in the lightening portion 11d. The fixing screw 12 has cylindrical portions 12a and 12b and a male screw portion 12c provided therebetween. The screw shaft direction of the male screw portion 12c is parallel to the left-right direction. Further, a disc-shaped regulating wall 12e is formed between the cylindrical portion 12a and the male screw portion 12c of the fixing screw 12. The fixing screw 12 has a grip portion 12d, and the user operates the grip portion 12d to rotate the fixing screw 12. The fixing screw 12 is inserted into the through hole 11e from the right side, and the female screw portion 13b of the fixing key 13 is screwed into the male screw portion 12c. The cylindrical portions 12a and 12b are pivotally supported in the through holes 11e and 11f, respectively.

  After the fixing key 13 is screwed to the fixing screw 12, the retaining pin 16 is inserted into the fixing key 13. The distal end portion of the retaining pin 16 inserted into the fixed key 13 reaches the through hole of the fixed key 13 in which the female screw portion 13b is formed. When the fixing screw 12 is loosened (when the fixing screw 12 is rotated so as to release the screwing with the fixing key 13), the retaining pin 16 contacts the regulating wall 12e from the right side in the through hole of the fixing key 13. The amount of movement of the fixing screw 12 relative to the fixing key 13 is regulated. Further, when the retaining pin 16 abuts against the restriction wall 12e, the screwing of the fixing screw 12 and the fixing key 13 is released and the fixing screw 12 is prevented from being detached from the base 11.

  The cover 17 is fixed to the pedestal 11 with four screws 18 from the back so as to cover the thinned portion 11d of the pedestal 11 from the rear.

  A step 11g and a step 13a are formed along the front-rear direction above the unit connection portion 11b and the fixed key 13, respectively. When the fixing key 13 is accommodated in the thinned portion 11d, a female dovetail groove (ant hole) 20 is formed by the step 11g and the step 13a (see FIG. 6). An engagement protrusion 15 is provided in a region (female dovetail groove 20) between the step 11 g and the step 13 a above the fixed key 13. The engagement protrusion 15 has a scallop shape in which a front side surface 15a is formed in a flat shape.

  When the female dovetail groove 20 formed in the second tripod seat unit 10 and the mounting portion 2c having the male dovetail shape of the first tripod seat unit 2 are engaged (ant joint), the first tripod is provided. The seat unit 2 is attached to the second tripod seat unit 10.

  5A to 5E are cross-sectional views of the second tripod seat unit 10 taken along line BB in FIG. In FIG. 5A to FIG. 5E, the first tripod seat unit 2 and the engaging protrusion 15 are indicated by broken lines for convenience of explanation.

  FIG. 5A shows a state in which the first tripod seat unit 2 is attached to the second tripod seat unit 10. In this state, the fixing screw 12 is loosened, and the regulation wall 12 e is in contact with the retaining pin 16. In order to attach the first tripod seat unit 2 to the second tripod seat unit 10, the female dovetail portion 20 is engaged with the attachment portion 2 c having a male dovetail shape from the front of the first tripod seat unit 2. At this time, since the fixed key 13 is urged toward the right side by the compression spring 14, the fixed key 13 is in contact with the right wall 11h of the thinned portion 11d. When the first tripod seat unit 2 is attached to the second tripod seat unit 10, the engagement protrusion 15 is disposed in the groove 2g and abuts against the guide slope 2d.

  When the first tripod seat unit 2 is moved forward from the state shown in FIG. 5 (a), the second tripod seat unit 10 is in the state shown in FIG. 5 (b). As the first tripod seat unit 2 moves, the engaging protrusion 15 moves while abutting against the guide surface 2e from the guide inclined surface 2d, so that the fixed key 13 can move from the wall 11h against the urging force of the compression spring 14. Move away and move left.

  FIG. 6 shows a rear view of the first tripod seat unit 2 and the second tripod seat unit 10 at this time. In FIG. 6, the illustration of the cover 17 is omitted for convenience of explanation. As shown in FIG. 6, a female dovetail groove (ant hole) 20 is formed in the second tripod seat unit 10 by a step 11g and a step 13a. As the engaging protrusion 15 moves from the guide slope 2d to the guide surface 2e while moving, the fixed key 13 moves toward the left side, and the width of the female dovetail groove 20 in the left-right direction increases. Therefore, the attachment portion 2c can be easily attached to the second tripod seat unit 10.

  When the first tripod seat unit 2 is further moved forward from the state shown in FIG. 5 (b), the second tripod seat unit 10 is in the state shown in FIG. 5 (c). In the state shown in FIG. 5C, the compression protrusion 14 urges the fixed key 13 to the right, so that the engagement protrusion 15 enters the engagement groove 2f. At this time, the fixed key 13 is closer to the wall 11h than the state shown in FIG.

  FIG. 7 shows a rear view of the first tripod seat unit 2 and the second tripod seat unit 10 at this time. In FIG. 7, the illustration of the cover 17 is omitted for convenience of explanation. As shown in FIG. 7, in the state in which the engaging protrusion 15 enters the engaging groove 2f, the fixing key 13 is urged by the compression spring 14, so that the mounting portion 2c is sandwiched between the step 11g and the step 13a. Is done. At this time, the attachment portion 2 is only held by the urging force of the compression spring 14, and the first tripod seat unit 2 is not fixedly held to the second tripod seat unit 10.

  However, in the state shown in FIG. 5C, the engaging protrusion 15 enters the engaging groove 2f, and the movement of the engaging protrusion 15 in the front-rear direction is restricted by the front and rear side surfaces of the engaging groove 2f. Yes. Therefore, even if the first tripod seat unit 2 is moved in the front-rear direction, the movement of the first tripod seat unit 2 is restricted by the engagement protrusion 15 coming into contact with the front and rear side surfaces of the engagement groove 2f. As a result, the engagement protrusion 15 and the engagement groove 2f operate as a mechanism for preventing the first tripod seat unit 2 from falling off, and the first tripod seat unit 2 is unintentionally detached from the second tripod seat unit 10. Can be prevented from falling off.

  Further, in the state shown in FIG. 5C, the first tripod base unit 2 is not fixedly held to the second tripod base unit 10, so that the fixing key 13 is moved to the left by an external force not intended by the user. May move in the direction. For example, when an external force is applied to the pedestal 10 to vibrate the pedestal 10 in the left-right direction, or a force is applied to rotate the second tripod seat unit 10 about an axis parallel to the vertical direction. In this case, the fixing key 13 may be pushed leftward by the mounting portion 2c of the first tripod seat unit 2, and the engagement between the engagement protrusion 15 and the engagement groove 2f may be instantaneously released. When the engagement between the engagement protrusion 15 and the engagement groove 2f is released, if a force that moves the first tripod seat unit 2 backward is applied, the first tripod seat unit 2 becomes the second tripod seat unit. 10 will be removed. Therefore, in this embodiment, the cover 17 prevents the engagement between the engagement protrusion 15 and the engagement groove 2f from being instantaneously released by an unintended external force.

  8 (a) and 8 (b) respectively show the first tripod seat unit 2 and the second tripod when the second tripod seat unit 10 is in the state shown in FIG. 5 (c). The rear view of the seat unit 10 and the bottom view of the 1st tripod seat unit 2 are shown. In FIG. 8A, for convenience of explanation, the fixed key 13 is indicated by a broken line. Moreover, in FIG.8 (b), the cover 17 is shown with the broken line for convenience of explanation.

  As shown in FIG. 8A, the side surface 17a of the cover 17 partially overlaps the step 13a in the front-rear direction. Further, as shown in FIG. 8B, the rear end portion of the mounting portion 2c is disposed at the same position as the side surface 17a of the cover 17 in the front-rear direction. Therefore, in the state shown in FIGS. 8A and 8B (FIG. 5C), when an external force is applied to the pedestal 11 in the right direction, the mounting portion 2c moves relatively to the left. The left end of the mounting portion 2 c comes into contact with the side surface 17 a of the cover 17. Since the cover 17 is fixed to the pedestal 11 with screws 18, it is possible to prevent the mounting portion 2 c from moving further to the left side from the state where it is in contact with the side surface 17 a. As a result, the fixed key 13 is prevented from moving to the left side by being pushed by the mounting portion 2c, and the engagement between the engagement protrusion 15 and the engagement groove 2f is released by the external force applied to the base 11. Can be prevented.

  When the fixing screw 12 is tightened from the state shown in FIG. 5C, the second tripod seat unit 10 is in the state shown in FIG. When the fixing screw 12 is tightened, the fixing key 13 does not move because the step 13 a is in contact with the mounting portion 2 a, and the fixing screw 12 is pulled into the fixing key 13. The fixing screw 12 stops when the contact surface 12f contacts the right wall 11i of the base 11.

  FIG. 9 shows a cross-sectional view of the first tripod seat unit 2 and the second tripod seat unit 10 at this time. FIG. 9 is a cross-sectional view of the first tripod seat unit 2 and the second tripod seat unit 10 taken along line AA in FIG. When the fixing screw 12 is further tightened from the state shown in FIG. 9, the movement of the fixing screw 12 in the left direction is restricted by the wall 11i, so that the fixing key 13 is moved to the wall 11h side (right side). Be drawn. As a result, the stepped portion 13 a of the fixed key 13 is pressed into contact with the mounting portion 2 c according to the fastening of the fixing screw 12. Thereby, the attaching part 2c is firmly clamped by the level | step difference 11g and the level | step difference 13a, and the 1st tripod seat unit 2 is fixedly held by the 2nd tripod seat unit 10. FIG. In a state where the first tripod seat unit 2 is fixedly held by the second tripod seat unit 10, even if a force is applied to the first tripod seat unit 2 in the front-rear direction, the first tripod seat unit 1 The movement of the unit 2 is regulated by the frictional force between the mounting portion 2c and the step 11g and the step 13a.

Here, the first tripod seat unit 2 can pass the second tripod through the state shown in FIG. 5D only by tightening the fixing screw 12 about two turns from the state shown in FIG. The seat unit 10 is securely fixed and held. Therefore, the first tripod seat unit 2 can be fixedly held on the second tripod seat unit 10 by a simple operation without requiring a large force. Further, since the operation is simple, the first tripod seat unit 2 can be quickly fixed and held on the second tripod seat unit 10.

  Next, an operation of removing the first tripod seat unit 2 from the second tripod seat unit 10 will be described. In order to remove the first tripod seat unit 2, the fixing screw 12 is first loosened from the state shown in FIG. 5 (d) until the regulating wall 12 e of the fixing screw 12 contacts the retaining pin 16. Thereby, the 2nd tripod seat unit 10 will be in the state shown in Drawing 5 (c) from the state shown in Drawing 5 (d). At this time, the contact surface 12f of the fixing screw 12 is separated from the wall 11i.

  In the state shown in FIG. 5C, when the fixing screw 12 is pushed toward the left side against the urging force of the compression spring 14, the contact surface 12 f comes into contact with the wall 11 i of the base 11 and stops. At this time, the 2nd tripod seat unit 10 will be in the state shown in Drawing 5 (e). In the state shown in FIG. 5 (e), the engagement of the engagement protrusion 15 and the engagement groove 2f is released, and therefore the rearward movement of the first tripod seat unit 2 is not restricted. Therefore, the first tripod seat unit 2 can be detached from the second tripod seat unit 10 by moving the first tripod seat unit 2 backward while pressing the fixing screw 12.

  As described above, in the tripod seat attaching / detaching mechanism of the present embodiment, when the attachment portion 2c and the female dovetail portion 20 are engaged, and the first tripod seat unit 2 is mounted on the second tripod seat unit, the engagement protrusion When 15 enters the engaging groove 2f, the first tripod seat unit 2 is prevented from falling off. In order to operate the engagement protrusion 15 and the engagement groove 2f as a mechanism for preventing the first tripod seat unit 2 from falling off, the first tripod seat unit 2 is moved with the attachment portion 2c and the female dovetail portion 20 engaged. There is no need to operate the fixing screw 12 or the like. Therefore, the user's operation burden for preventing the first tripod seat unit 2 from falling off is small, and the usability is good.

  Further, in the tripod seat attaching / detaching mechanism of the present embodiment, the first tripod seat unit 2 can be held and released from the second tripod seat unit 10 by tightening or loosening the fixing screw 12. it can. Further, in a state where the fixing screw 12 is loosened and the tripod unit 10 is released, the fixing screw 12 is moved in the screw shaft direction, thereby releasing the engagement between the engaging protrusion 15 that is a drop-off prevention mechanism and the engaging groove 2f. be able to. By operating the fixing screw 12, both the fixing release and the release preventing release can be performed. Therefore, the first tripod seat unit 2 is prevented from falling off while the second tripod seat unit 2 is prevented from falling off. Attachment to and removal from the tripod unit 10 can be performed quickly. In addition, since the first tripod seat unit 2 is fixedly held and released only by tightening and fixing the fixing screw 12, the operation burden on the user is small and the usability is good.

  The above is the description of the exemplary embodiments of the present invention. Embodiments of the present invention are not limited to those described above, and various modifications are possible within the scope of the technical idea of the present invention. For example, the embodiment of the present invention also includes contents appropriately combined with embodiments or the like clearly shown in the specification or obvious embodiments.

  Further, in the configuration shown in FIG. 8A, the side surface 17a of the cover 17 is arranged on the right side of the part 13aa of the step 13a, but the present embodiment is not limited to this. The side surface 17a only needs to be at a position where the engagement between the engagement protrusion 15 and the engagement groove 2f can be prevented from being released, and may be disposed on the left side of the part 13aa of the step 13a.

  FIG. 10A is a rear view of the first tripod seat unit 2 and the second tripod seat unit 10 in the first modification of the present embodiment. FIG. 10B is a bottom view of the first tripod seat unit 2 in the first modification. In FIG. 10A, the fixed key 13 is indicated by a broken line for convenience of explanation. In FIG. 10B, the cover 17 is indicated by a broken line for convenience of explanation. In FIG. 10B, the engagement protrusion 15 when the engagement protrusion 15 and the engagement groove 2f are engaged (when in the state shown in FIG. 5C) is indicated by a solid line. Show. In FIG. 10B, the engagement protrusion 15 when the engagement between the engagement protrusion 15 and the engagement groove 2f is released (when the engagement protrusion 15 is in the state shown in FIG. 5E) is indicated by a broken line. Is shown.

  When the first tripod seat unit 2 is moved rearward while the engaging protrusion 15 and the engaging groove 2f are engaged, the flat surface portion 15a of the engaging protrusion 15 is moved to the front surface 2h of the engaging groove 2f. Abut. This prevents the engagement protrusion 15 and the engagement groove 2f from being disengaged. When the fixing screw 12 is pushed to the left side, the engagement protrusion 15 moves to the left by the distance L1 with respect to the first tripod seat unit 2 as shown by the broken line in FIG. The engagement between the protrusion 15 and the engagement groove 2f is released. In this state, when the first tripod seat unit 2 is moved rearward, the flat portion 15a of the engagement protrusion 15 does not contact the front surface 2h of the engagement groove 2f. It can be removed from the second tripod seat unit 10.

  Therefore, in order to prevent the engagement of the engagement protrusion 15 and the engagement groove 2f from being released when an unintended external force is applied to the pedestal 11, the engagement protrusion 15 is moved by the external force in FIG. It suffices to avoid moving to the position indicated by the broken line in FIG. In the first modified example shown in FIG. 10A, the side surface 17a is arranged on the left side by a predetermined distance L2 from a part 13aa of the step 13a. This distance L2 is set to be smaller than the movement amount L1 for changing from the state in which the engagement protrusion 15 is engaged with the engagement groove 2f to the state in which the engagement is released. Therefore, even if an external force is applied to the pedestal 11 in the right direction and the step 13a of the fixed key 13 is pushed to the left by the mounting portion 2c, the amount of movement of the engagement protrusion 15 in the left direction is suppressed to L2 or less. It is done. Therefore, the engagement between the engagement protrusion 15 and the engagement groove 2f is prevented from being released by an external force. Further, in the first modification, the interval between the side surface 17a and the side surface 17b of the cover 17 is wider than the configuration shown in FIG. Therefore, it becomes relatively easy to attach the first tripod seat unit 2 to the second tripod seat unit 10.

  Further, the shape of the cover 17 of the present embodiment is not limited to the shape shown in FIG. 8A or 10A. FIG. 11 is a rear view of the first tripod seat unit 2 and the second tripod seat unit 10 in the second modification of the present embodiment. In the second modified example, as shown in FIG. 11, the side surface 17a of the cover 17 when viewed from the front-rear direction is formed in a shape along the slope 13ab on the right side of the step 13a. According to such a configuration, not only when an unintended external force is applied to the pedestal 11 in the right direction, but also when an external force is applied in the downward direction or the lower right direction, the attachment portion 2c contacts the side surface 17a. Thereby, it can prevent more reliably that the level | step difference 13a is pushed by the attaching part 2c, and moves to the left side.

  Further, the shape of the engagement protrusion 15 of the present embodiment is not limited to the scallop shape. For example, the engagement protrusion 15 may have a cylindrical shape or a quadrangular prism shape. However, when the engagement protrusion 15 is engaged with the engagement groove 2f, the first tripod seat unit 2 is brought into contact with the front surface 2h of the engagement groove 2f, so that the first tripod seat unit 2 becomes the second tripod seat unit. 10 is prevented from falling off. Therefore, it is desirable that the portion (front portion) that contacts the surface 2h of the engagement protrusion 15 is formed in a flat shape.

  Further, the first tripod seat unit 2 shown in FIG. 3 has a mounting surface 2b and is screwed to the lens barrel 1, but the present embodiment is not limited to this. For example, the first tripod seat unit 2 may have a ring-shaped fastening member. In this case, when the ring-shaped fastening member is fitted to the lens barrel 1, the first tripod seat unit 2 is detachably attached to the lens barrel 1 and is fixedly held. Further, the first tripod seat unit 2 may be detachably mounted and fixed to the housing of the photographing apparatus instead of the lens barrel 1.

  5A to 5E show only the first tripod seat unit 2 and the second tripod seat unit 10, but in this embodiment, the first tripod seat unit 2 is a lens mirror. It is possible to fix and hold the first tripod seat unit 2 to the second tripod seat unit 10 while the second tripod seat unit 10 is fixed and held by the tube 1 and the tripod. .

  In FIG. 1, the first tripod seat unit 2 is detachably attached to the lens barrel 1 and is fixedly held. However, the present embodiment is not limited to this. For example, the first tripod seat unit 2 may be detachably mounted on the tripod and fixedly held. In this case, the second tripod seat unit 10 is detachably attached to the lens barrel 1 or the housing of the photographing apparatus and fixedly held.

  Moreover, in this embodiment, when the fixing screw 12 is tightened to the fixing key 13, the mounting portion 2c is firmly held by the step 11g and the step 13a, and the first tripod seat unit 2 is the second tripod seat unit. However, the present embodiment is not limited to this. For example, in the present embodiment, when the second tripod seat unit 10 is in the state shown in FIG. 5C, the first tripod seat unit 2 is moved to the second tripod by pulling the fixing screw 12 in the right direction. The seat unit 10 may be fixedly held. When the fixing screw 12 is pulled rightward, the step 11g and the step 13a are pressed against the attachment portion 2c, and the attachment portion 2c is firmly held. As a result, the first tripod seat unit 2 is fixedly held by the second tripod seat unit 10. In this case, the fixing screw 12 is fixed in a state of being pulled by a fixing mechanism (not shown) so that the state of being pulled in the right direction is maintained.

  Further, when the first tripod seat unit 2 is fixedly held on the second tripod seat unit 10 by pulling the fixing screw 12 rightward, it is not necessary to tighten or loosen the fixing screw 12. Therefore, in this case, the fixing screw 12 and the fixing key 13 only need to be configured to move integrally in the left-right direction, and need not be screwed together by screws.

DESCRIPTION OF SYMBOLS 1 Lens barrel 1a Connection part 2 1st tripod seat unit 2a Hole 2b Mounting surface 2c Mounting part 2d Guide slope 2e Guide surface 2f Engaging groove 2g Groove 2h Surface 10 2nd tripod seat unit 11 Base 11a Tripod connection part 11b Unit connection portion 11c Screw hole 11d Thinned portion 11e Through hole 11f Through hole 11g Step 11h Wall 11i Wall 12 Fixing screw 12a Cylindrical portion 12b Cylindrical portion 12c Male screw portion 12d Holding portion 12e Restriction wall 12f Contact surface 13 Fixed key 13a Step 13aa Part of step 13ab Slope 14 Compression spring 15 Engaging projection 16 Retaining pin 17 Cover 17a, 17b Side face 18 Screw 20 Female dovetail

Claims (3)

A first tripod unit,
A second tripod seat unit to which the first tripod seat unit is detachably mounted,
One of the first tripod seat unit and the second tripod seat unit is
A first fixing member;
A second fixing member threadably engaged with the first fixing member,
The other of the first tripod unit and the second tripod unit is
When the first fixing member is clamped to the second fixing member, the first fixing member is clamped by the one of the first tripod seat unit and the second tripod seat unit and the second fixing member. Having a mounting portion fixed and held in the
When the mounting portion is fixedly held , the first tripod seat unit is fixedly held by the second tripod seat unit ,
The second fixing member has an engaging protrusion,
The attachment portion has a groove portion in which the engagement protrusion can advance and retreat and an engagement groove is formed,
The groove portion guides the engaging protrusion in the groove portion when the first tripod seat unit is attached to the second tripod seat unit,
When the engagement protrusion is guided to the engagement groove of the groove portion, the engagement protrusion engages with the engagement groove to prevent the first tripod seat unit from being detached from the second tripod seat unit. The
Tripod mounting mechanism. The mounting portion has a male dovetail groove,
The one of the first tripod seat unit and the second tripod seat unit and the second fixing member form a female dovetail groove into which the male dovetail groove is fitted.
The tripod seat attaching / detaching mechanism according to claim 1 . A biasing portion that biases the second fixing member toward the mounting portion;
The tripod seat attaching / detaching mechanism according to claim 1 or 2 .

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