JPH0553038A - Focusing rail - Google Patents

Abstract

PURPOSE:To execute the moving adjustment in three directions of the optical axis direction, the direction being orthogonal to the optical axis direction, and the vertical direction by providing three moving mechanisms which can move a camera fitting seat in the optical, axis direction and two directions being orthogonal to said direction, respectively. CONSTITUTION:For instance, in a forward/backward moving mechanism, a first bevel gear fixed to the tip part of a rotation axis is rotated by a rotation of a forward/backward moving knob to a shift seat 2. The rotation of this first level gear 12 is transmitted to a second bevel gear 13 and a form screw 14. By an action with a rack plate 16 fixed to a rectilinear rail 3, the rectilinear rail 3 moves in the optical axis direction to the shift seat 2. Also, for instance, in a left/right moving mechanism, by rotation of a left/right moving knob 8 to the shift seat 2, the shift seat 2 moves in the left and the right directions against a tripot fitting seat 1 by a screw feed action of a screw part of a rotation axis of the left/right moving knob 8, and a left/right driving screw base 18 fixed to the tripot fitting seat 1 for supporting a movement of the shift seat 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera with respect to a tripod in the optical axis direction, in the same plane as the optical axis direction and in a direction orthogonal to the optical axis direction, and in a vertical direction orthogonal to the optical axis direction. Three
The present invention relates to a focusing rail that is mounted so that it can be moved and adjusted in each direction.

[0002]

2. Description of the Related Art Conventionally, there have been some focusing rails that move in two directions (front-back direction and left-right direction), but none move vertically. This is because the focusing rail is usually used by attaching it to a tripod, so the elevator mechanism of the tripod was insufficiently substituted for the vertical direction.

However, when the tripod is extended and used, stability is impaired, and when the tripod is tilted and used, it cannot be moved in three directions.

Conventionally, close-up photography has been in the area of professional photographers and amateur photographers having some advanced photography techniques, but with the spread of autofocus cameras in recent years, close-up photography has also been performed among general amateur photographers. The desires are increasing. Along with this, a compact and simplified tripod has also been put into practical use.
A tripod without a telescopic mechanism has also appeared. With such a tripod, there is a problem that even the height adjustment in the vertical direction cannot be performed as described above.

Further, when a close-up is taken using a bellows device or the like, the photographing magnification is set by changing the distance between the lens system and the film surface. However, since the photographing distance also changes according to the photographing magnification, the photographing magnification is changed. Focusing rails have been used conventionally to set (focus) the appropriate shooting distance.

However, since most of the conventional focusing rails described above move only in the direction of the optical axis, it is very inconvenient to change the composition for close-up photography, which is narrow-range photography using a tripod or the like.

In order to solve this problem, focusing rails that are movable in the lateral direction orthogonal to the optical axis are currently on the market, but even with this equipment, the vertical direction (vertical direction) is used.
With regard to composition setting, there was a problem that it was necessary to deal with it by using a tripod elevator mechanism or the like.

Therefore, an object of the present invention is to solve the above-mentioned problems, and a focusing rail capable of adjusting movements in the optical axis direction, the direction orthogonal to the optical axis direction, and the vertical direction. To provide.

[0009]

In order to achieve the above object, the present invention provides a first moving mechanism capable of moving a camera mounting seat in the optical axis direction, and a movable in two directions orthogonal to the optical axis direction. The second and third moving mechanisms are provided so as to independently adjust the movement in the three directions.

That is, the camera mounting seat for mounting the camera is provided, and the first mounting mechanism for moving the camera mounting seat in the optical axis direction is provided between the camera mounting seat and the tripod mounting seat. A second moving mechanism that moves in one direction orthogonal to the optical axis direction and a third moving mechanism that moves the camera mounting seat in another direction orthogonal to the optical axis direction are configured. ..

In the above structure, the first moving mechanism includes a left and right moving member that moves in a plane orthogonal to the optical axis direction with respect to the tripod mount, the tripod mount and the tripod mount. It may be configured to have a left / right adjusting member which is disposed on either one of the left / right moving member and which moves the left / right moving member with respect to the tripod mount by a rotating operation.

In the above structure, the second moving mechanism includes an optical axis direction moving member that moves in the optical axis direction with respect to the left and right moving member, the left and right moving member, and the optical axis direction moving member. The optical axis direction adjusting member may be arranged on either one of the left and right moving members to move the optical axis direction moving member in the optical axis direction with respect to the left and right moving member.

In the above structure, the third moving mechanism is fixed to the fixing member provided on the moving member in the optical axis direction, is screwed to the fixing member, and is rotatable on the lower surface of the camera mounting seat. It is also possible to have a vertical movement adjusting member that is supported by the camera and that moves integrally with the camera mounting seat in the vertical direction.

Further, in the above structure, a camera mounting screw member is rotatably arranged between the camera mounting seat and the tripod mounting seat, and the camera mounting screw member is arranged in the vertical direction of the camera mounting seat. When the camera mounting seat is inserted into the guide through hole and the vertical guide through hole of the tripod mounting seat respectively so that the camera mounting seat moves vertically with respect to the tripod mounting seat by the third moving mechanism, the camera mounting seat is mounted. The screw member may be configured to function as a linear guide means for vertical movement with respect to the camera mounting seat and the tripod mounting seat.

Further, in the above construction, the screw lead of the vertical movement adjusting member of the third moving mechanism is substantially the same as the screw lead on the inner surface, and the rotary lead moves up and down in synchronization with the vertical movement of the vertical movement adjusting member. A lock interlocking cylinder, a lock interlocking shaft having screw leads substantially the same as the screw lead of the vertical movement adjusting member, and screwed with the lock interlocking cylinder, and the lock interlocking shaft provided at a lower end of the lock interlocking shaft and rotated by a rotation operation. Is rotated with respect to the lock interlocking barrel to lower the lock interlocking barrel to lower the camera mounting seat, thereby crimping a screw between the vertical movement adjusting member and the fixing member. A lock lever for locking the vertical movement adjusting member may be provided together with the mounting seat.

[0016]

According to the above construction, the first mounting mechanism that can move the camera mounting seat in the optical axis direction and the second and third moving mechanisms that can move in the two directions orthogonal to the optical axis direction. Therefore, the movements can be adjusted independently in the three directions. Therefore, not only the original movement of the focusing rail in the optical axis direction but also the three-dimensional movement capable of moving in two directions orthogonal to the optical axis, for example, in the horizontal direction and the vertical direction, can be performed in order to simplify the composition setting for the photographing screen. it can. In addition, since it can be moved in two directions orthogonal to the optical axis, the composition can be set in these directions without being moved by a tripod or the like, which is very convenient.

Further, in the above structure, if each moving mechanism is constituted by a screw mechanism, it is possible to effectively prevent the weight from falling due to its own weight when moving in each direction, and to improve the operability. it can. In addition, since the structure of each moving mechanism uses screws, fine adjustment movement is possible, and it is possible to effectively prevent falling by its own weight and greatly improve fine adjustment operability.

Further, by arranging a camera mounting screw member between the camera mounting seat and the tripod mounting seat so as to be freely rotatable, a straight key for rotation control of the camera mounting seat which moves up and down by a screw is used for mounting the camera. A tripod screw member can be used. Therefore, since the rectilinear key is constructed by diverting the function-required component as the focusing rail, that is, the camera mounting screw member, the structure is simple and the assembly / component cost is advantageous. Further, by disposing the straight-ahead key away from the vertical movement adjusting member, it is possible to reduce the play in the rotational direction of the vertical movement adjusting member due to the straight-ahead key play.

In the above structure, if the vertical movement adjusting member is provided with a lock mechanism having the lock interlocking cylinder, the lock interlocking shaft, and the lock lever, a lock mechanism having good operability and stability is achieved. be able to.
Also, by rotating the lock lever, the screw between the vertical movement adjustment member and the fixed member is locked by axial tightening, so the roundness of the screw is not broken and the parts are not deformed. It can be prevented, and since the lock load is applied to the entire screw, the frictional contact surface is widened and a stable lock effect can be obtained.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below with reference to FIGS.
Will be described in detail based on.

Before explaining the embodiments according to the present invention, first, the requirements for the focusing rail are that the moving drive means needs a fine adjustment means and that the camera / bellows device, the lens, and the like must prevent the weight from falling. That is, it is desirable to use one piece of equipment for composition setting, and it is desirable to use rigid equipment. These requirements will be described in more detail.

Fine adjustment means is required for the movement drive means.
In the movement along the optical axis, that is, in focusing, in close-up photography, focus cannot be obtained (setting of photographing distance) unless the depth of field is extremely shallow and fine adjustment movement is possible.
For example, in a depth of field of f = 50 mm, the shooting magnification of F8 is ± 0.24 mm, the shooting magnification is ± 1 mm, the shooting magnification of F8 is ± 0.03 mm, and the shooting magnification is ± 0.13.
mm.

On the other hand, in the vertical / horizontal direction of the screen, that is, in the composition setting, as shown in FIGS. 9 and 10, as in the normal snap photography (see FIGS. 7 and 8) for changing the composition in close-up photography, When the camera is shaken as an arrow to change the composition, the focus becomes out of focus due to the close proximity of the shooting distance and the shallow depth of field (see FIG. 10B). Therefore, as shown in FIG. 11, in order to change the composition, it is necessary to move in the vertical direction (shift) orthogonal to the optical axis. Also, with regard to the amount of movement, the shooting range is narrow and the screen changes greatly with very little movement. Therefore, fine adjustment movement is required.

By a camera / bellows device, a lens, etc.
It is necessary to prevent the camera from falling due to its own weight. In many cases, the subject cannot be moved during close-up photography, and the photography posture is not always horizontal. In addition, when shooting a sample or specimen on a table, the shooting is always downward. In this case, the weight of the camera / bellows device, lens, etc. in the optical axis direction (1 kg to 1.5 k
Since g) is all added to the moving mechanism, the rack-and-pinion moving mechanism generally used causes its own weight drop. This means that when operating the small operation knob, it is necessary to operate it while pinching with a finger so that the operation knob does not rotate due to its own weight drop when it is downward (extended). For upward (take-in) operation, the rotational force that overcomes its own weight drop. Was necessary, and it was very difficult to operate the operation knob. further,
At the time of focusing, it is necessary to perform the locking operation while stopping the weight drop against the lock of the moving mechanism with the operation knob, and it is also necessary to secure the lock strength that overcomes the weight drop.

When the screen is set in the vertical position even when it is moved laterally (left and right) with respect to the optical axis, the weight of the photographic equipment is similarly added and the screen shift is affected. In many bellows devices, the vertical and horizontal screens can be changed within the bellows device, so there is no effect. With respect to movement in the vertical (up and down) direction with respect to the optical axis, the weight of the photographic equipment is affected by the weight of the photographic equipment in all shooting conditions that are affected by the weight drop unless shooting downward. Therefore, in these cases, it is necessary to prevent the weight from falling.

For composition setting, it is desirable to use only one device
When changing the composition using a conventional focusing rail that moves only in the optical axis direction, shake the camera in the left-right direction with the camera mount tripod screw or the focusing rail-mount tripod screw head. There is. If this operation is performed, the shooting distance shifts as described above and becomes out of focus. Therefore, it is necessary to set the shooting distance by moving the focusing rail in the optical axis direction, that is, refocus. On the other hand, in the up and down direction, the tripod is tilted, but it is necessary to reset the photographing distance similarly to the above. It is desirable to provide this function in the focusing rails because it is necessary to use focusing rails for both right and left and up and down.

It is desirable to use rigid equipment. Not only focusing rails but also high-magnification in close-up photography causes slight vibrations, which may cause blurring in photography. Therefore, it is preferable that the moving portion of the focusing rail is rigid and has a large contact area.

The focusing rail according to the embodiment of the present invention satisfies these requirements.

As shown in FIG. 1, the focusing rail can be attached to the bottom of the camera and has a forward / backward moving mechanism for adjusting the movement in the optical axis direction, and a vertical movement mechanism in the forward / backward moving plane and orthogonal to the optical axis direction. A horizontal movement mechanism for adjusting the movement in the direction of the optical axis and a vertical movement mechanism for adjusting the movement in the direction orthogonal to the optical axis direction are provided.

First, the forward / backward moving mechanism will be described with reference to FIGS.

The rotation of the forward / backward moving knob 6 with respect to the shift seat 2 causes the first bevel gear 12 fixed to the tip of the rotary shaft 12a to rotate. The front-rear moving knob 6, the bearing 6a, and the bearing 6a and the first bevel gear 12 are integrally fixed. Therefore, the rotation of the first bevel gear 12 is transmitted to the second bevel gear 13 and the worm screw 14, and by the action of the rack plate 16 fixed to the straight traveling rail 3, the straight traveling rail 3 is moved in the optical axis direction with respect to the shift seat 2. (Left and right direction in FIG. 2). The linear rail 3 has a substantially trapezoidal cross section, and is fitted into the first dovetail groove 2a in the upper part of the shift seat 2 so as to be movable in the optical axis direction. The optical axis of the linear rail 3 is caused by the first dovetail groove 2a. Directional straight guide is provided. As shown in FIG. 5, the rotary shafts 12a of the first and second bevel gears 12 and 13 are
13 a is supported by a bevel gear bearing 15. After the rectilinear rail 3 is moved to a predetermined position, backlash between the rectilinear rail 3 and the first dovetail groove 2a and backlash between the worm screw 14 and the rack plate 16 are prevented by the front and rear lock screws 7 provided on the shift seat 2. Is fastened to the shift seat 2 with a screw and the straight rail 3 is pressed against the shift seat 2 in the left-right direction. When the rack plate 16 is attached to the straight-ahead rails 3, both longitudinal ends of the rack plate 16 are pressed against the straight-ahead rails 3 by the rack plate retainers 17, and racks are formed on the rack plate retainers 17 and 17. Since it does not exist, it also functions as a stopper in the front-rear movement of the worm screw 14 with respect to the rack plate 16. To prevent the back-and-forth movement knob 6 from coming off,
This is done by inserting the pin 40 of the shift seat 2 into the bearing 6a so as to allow the rotation of the bearing 6a.

Next, the left and right moving mechanism will be described with reference to FIGS.

When the left / right moving knob 8 rotates with respect to the shift seat 2, the left / right fixed to the screw portion of the rotary shaft 8a of the left / right moving knob 8 and the tripod mount 1 for supporting the movement of the shift seat 2 described later. The shift seat 2 moves in the left-right direction (left-right direction in FIGS. 3 and 4) with respect to the tripod mount 1 by the screw feeding action with the drive screw base 18. A second dovetail groove 2b is formed below the shift seat 2 so as to extend in a direction orthogonal to the optical axis direction. The upper portion of the tripod mounting seat 1 has a substantially trapezoidal cross section, and is fitted in the second dovetail groove 2b of the shift seat 2 so as to be movable in the left-right direction orthogonal to the optical axis direction. By tripod mount 1
The vehicle is guided straight in the left-right direction. After the shift seat 2 is moved to a predetermined position with respect to the tripod mounting seat 1, the rattling prevention between the tripod mounting seat 1 and the second dovetail groove 2b and the horizontal movement knob 8 are performed.
In order to prevent backlash between the rotary shaft 8a and the left and right drive screw base 18, the left and right lock screws 9 provided on the shift seat 2 are screwed to the shift seat 2, and the tripod mounting seat 1 is attached to the shift seat 2. This is done by pressing in the optical axis direction. Left and right stoppers 8b and 8c are formed at both axial ends of the rotary shaft 8a of the left and right moving knob 8, and the left and right stoppers 8b and 8c contact the end faces of the left and right driving screw bases 18 to perform the function of stoppers. .. The click mechanism 19 is for indicating the center position of the tripod mount 1 and the shift seat 2. That is, the recess 2c is formed in a portion corresponding to the center position of the shift seat 2, and the ball 42 biased upward by the spring 41 of the tripod mounting seat 1 enters into the recess 2c, thereby providing a click feeling. This is to inform the operator that the shift seat 2 is located at the center position with respect to the tripod mount 1.

Further, the vertical moving mechanism will be described with reference to FIGS.

The female screw portion of the inner surface of the vertically moving barrel 10 is screwed into the male screw portion of the outer peripheral surface of the fixed screw barrel 20 fixed to the upper surface of the central portion of the straight-moving rail 3, and based on the rotation of the vertically moving barrel 10. The vertical moving barrel 10 moves in the vertical direction in FIG. 2 by the feed screw action of the female screw portion of the vertical moving barrel 10 and the male screw portion of the fixed screw barrel 20 fixed to the linear rail 3. The support cylinder 21 is fixed to the lower surface of the camera mounting seat 4 by bolts 24 ,. This support tube 2
A concave portion 21a is formed on the outer peripheral surface of the upper end portion of 1, and the opening 10b of the upper end portion of the vertical moving barrel 10 is fitted into the concave portion 21a so that the vertical moving barrel 10 connects the support barrel 21 and the camera mounting seat 4. Are supported rotatably and immovably in the axial direction, and as a result, the up-and-down moving barrel 10 moves up and down, so that the camera mounting seat 4 moves up and down via the supporting barrel 21.
It moves integrally with 0 in the axial direction, that is, in the vertical direction.

On the other hand, the camera mounting screw 5 is arranged between the straight-moving rail 3 and the camera mounting seat 4 and regulates the rotation of the camera-mounting seat 4 with respect to the straight-moving rail 3 when the vertically moving barrel 10 rotates. As a result, the camera mounting seat 4 that is moved up and down by the up-and-down moving barrel 10 moves straight in the up-down direction without rotating with respect to the straight-moving rail 3. The camera mounting screw 5 will be described in detail. Between the recess 5a formed in the lower part of the camera mounting screw 5 and the rack plate 16 exposed through the through hole 3a of the straight-moving rail 3 for improving the operability when mounting the camera. A spring 29 is inserted into the upper end of the rack plate 16 to constantly push the camera mounting screw 5 upward with respect to the upper surface of the rack plate 16. The lower end of the camera mounting screw 5 can be fitted in the guide hole 30a of the straight guide ring 30 fixed to the end of the straight rail 3 and the through hole 3a of the straight rail 3 so as to be vertically movable and rotatable. Is becoming
A concave portion 5c is also formed on the lower surface of the operation portion 5d at the center of the camera mounting screw 5, and the straight guide ring 3 is formed in the concave portion 5c.
While 0 can be fitted vertically and freely,
The upper end of the camera mounting screw 5 is vertically movably and rotatably fitted in the straight guide hole 4a of the camera mounting seat 4.
A straightness guide of the camera mounting screw 5 itself and a rotation restricting straightness guide of the camera mounting seat 4 are provided. The screw 5b on the upper end of the camera mounting screw 5 is screwed into a tripod mounting hole at the bottom of the camera (not shown) by rotating the camera mounting screw 5 with respect to the camera mounting seat 4 and the straight-ahead rail 3 to mount the camera on the camera. It is attached to the mounting seat 4.
Therefore, when the camera bottom is pressed against the camera mounting seat 4 when the camera is mounted, the camera mounting screw 5 temporarily moves downward against the urging force of the spring 29, so that the camera is stably mounted on the camera mounting seat 4. Can be set on. Then, by simply rotating the camera mounting screw 5 with respect to the camera mounting seat 4, the screw 5b of the camera mounting screw 5 is easily screwed into the tripod mounting hole of the camera by the upward biasing force of the spring 29. The camera can be fixed to the camera mounting seat 4. Since the camera mounting screw 5 maintains straightness by the upper and lower guide holes 4a and 30a, before the camera is mounted on the camera mounting seat 4, there is a gap between the upper end of the camera mounting screw 5 and the guide hole 4a. Also, there is some play between the lower end of the camera mounting screw 5 and the guide hole 30a, which may impair the straightness. However,
In actual use, by mounting the camera on the camera mounting seat 4, there is no backlash between the upper end of the camera mounting screw 5 and the guide hole 4a, and a normally used straight guide with one side fixed, The problem goes away.
That is, first, (A) the camera mounting screw 5 must be moved up and down when the camera is mounted, but (B) the camera mounting seat 4 and the camera mounting screw 5 are fixed after the camera is mounted. Therefore, due to the fixing action of these two members, the camera mounting screw 5, which is a straight guide, is integrated with the camera mounting seat 4, and the backlash of the straight guide is only on the straight guide ring side, which is a normal guide form. The straightness of the seat 4 is not impaired. Further, since this linear guide function is located far outside the feed screw portion of the vertical moving barrel 10 with respect to the center of the vertical moving barrel 10, the straightness of the linear guide ring 30 is deteriorated due to the influence of backlash. There is no such thing.

As described above, the vertical movement linear guide of the present embodiment is provided with the two functions of (A) and (B) in one component, so that it is efficient and the position of the linear guide is more advantageous. Can be realized.

Next, as shown in FIGS. 2 and 6, the stopper and lock mechanism efficiently arranged in the internal space of the vertically moving cylinder 10 in the vertically moving mechanism will be described in detail.

The vertical moving barrel 10 has a small lead screw lead so that the composition can be finely adjusted with respect to the composition (framing) in the vertical direction of the screen. However, a large amount of movement is required to change the composition. The amount of rotation of the vertically moving cylinder is set to multiple rotations to increase the amount of movement. Normally, the stopper for the rotation of the ring is provided within one rotation, but in order to secure the above-mentioned movement amount, the present embodiment is provided with a stopper mechanism that can cope with multiple rotations of the vertical moving barrel 10. is there.

The three stopper rings 22, 22, 22 rotatably fitted to the outside of the support cylinder 21 are respectively
As shown in FIG. 6, a protrusion 22a is formed on the outer peripheral surface thereof,
Moreover, a stopper pin 22b is provided on the lower surface of the protrusion 22a. The above three stopper rings 22, 22, 22
One of the stopper rings 22 can secure the rotation amount of the vertical moving cylinder 10 for a little less than two rotations.
In this embodiment, since three stopper rings 22 are inserted, a total of less than four rotations are possible. The reason for this configuration is to secure a large feed movement amount with a small lead as described above.

In FIG. 6, the stopper rings 22, 2
A stopper ring retainer 23 having a stopper portion 23a projecting to the outer peripheral portion is disposed below 2,2,
When the stopper pin 22b on the lower surface of the projection 22a of the lowermost stopper ring 22 is engaged, the stopper pin 22b of the central stopper ring 22 is locked to the projection 22a of the lowermost stopper ring, and the central stopper As a result of the stopper pin 22b of the uppermost stopper ring 22 being locked to the protrusion 22a of the ring 22, it functions as a stopper against the rotation of the stopper rings 22, 22, 22. The stopper ring retainer 23 is fixed to the camera mounting seat 4 via the supporting cylinder 21 by bolts 24, ..., 24 for fixing the supporting cylinder 21 to the camera mounting seat 4. Fix the stopper ring retainer 23 with the above bolts (stopper ring retainer screws) 2
By mounting so that half of the head portion of No. 4 is hooked, the angle deviation of the stopper portion 10a provided on the lower surface of the upper end portion of the vertical moving barrel 10 with respect to the threaded holes of the feed screw of the vertical moving barrel 10 and the fixed screw barrel 20. Is configured to be adjustable.

Next, the lock mechanism will be described in detail.

At the center of rotation of the vertically moving barrel 10, a pair of screw fitting members 25 and 26 having screw leads substantially the same as the screw leads of the vertically moving barrel 10 are provided. The male screw side screw fitting member is the lock interlocking shaft 25, and the straight rail 3 (see FIGS. 2 and 3) and the vertical lock operating plate 1 are fixed by the set screw 26.
It is mounted on the straight rail 3 such that the vertical lock operation plate 11 can rotate with respect to the straight rail 3 but cannot move in the vertical direction.

On the other hand, the female screw side screw fitting member is a lock interlocking cylinder 26, which is rotatably fitted inside the support cylinder 21. In FIG. 2, the lock interlocking cylinder 26 is integrally screwed from below when the lock interlocking shaft 25 is inserted from above while sandwiching the vertical lock operation plate 11 with respect to the linear rail 3 during assembly. It is designed to rotate integrally with the interlocking shaft 25. The flange portion 26a at the upper end of the lock interlocking cylinder 26 is sandwiched between the support cylinder 21 and the camera mounting seat 4, and the amount of axial play is equal to or less than the screw feed amount corresponding to the operation angle of the up / down lock operation plate 11 or less. The lock interlocking cylinder 26 can rotate with the amount of backlash of
1 and the camera mounting seat 4. In addition, the lower end of the lock interlocking cylinder 26 has three notches 26.
b, 26b, 26b, and the rotation interlocking plate 27 has a protrusion 27a that engages with each notch 26b. This rotation interlocking plate 27 is provided with a rotation interlocking barrel 28 to move the vertical moving barrel 1
It is fixed integrally with 0. The rotation interlocking plate 27 has a space 27b between the plurality of protrusions 27a so that the stopper ring retainer screw 24 can be tightened to adjust the position of the stopper ring retainer 23.

The upper and lower lock operation plate 11 has an oval-shaped hole 11a, and an oval-shaped shaft portion 25 below the lock interlocking shaft 25.
a is fitted and the lock interlocking shaft 25 can be rotated by rotating the upper and lower lock operation plates 11, and the operation rotation angle is restricted by the recess 20a at the bottom of the fixed screw cylinder 20.
As shown in FIG. 3, a click hole 20b is provided in the recess 20a of the fixed screw cylinder 20 for positioning when unlocking, while the upper and lower lock operation plates 11 are provided with the click hole 20a.
It has a protrusion 11b that can be engaged with b.

Next, the operation of the lock mechanism will be described. The camera mounting seat 4 is operated by rotating the vertically moving cylinder 11.
Moves vertically, but at this time, the rotation interlocking cylinder 28 and the rotation interlocking plate 27 that are integrally fixed inside the vertical moving cylinder 10.
Also rotates synchronously. At this time, the lock interlocking cylinder 26 engaged with the rotation interlocking plate 27 and the lock interlocking shaft 25 also rotates, but as described above, the screw engagement with the lock interlocking shaft 25 is performed by the feed screw of the vertical moving cylinder 10. Because it is the same lead as
The lock interlocking cylinder 26 can move up and down together with the vertically moving cylinder 10 while maintaining screw engagement with the lock interlocking shaft 25. That is, when the vertical lock operation plate 11 is not loaded, when the lock interlocking cylinder 26 is synchronously rotated by the rotation of the vertical moving cylinder 10 via the rotation interlocking cylinder 28 and the rotation interlocking plate 27, The lock interlocking shaft 25 and the vertical lock operating plate 11 also rotate at the same time due to the friction of the engaging screw portion with the lock interlocking shaft 25, and strike the notch 20a in the lower part of the fixed screw cylinder 20 to lock the interlocking shaft 25 and the vertical lock operating plate 11 The result is that the rotation stops. Even if the rotation of the lock interlocking shaft 25 and the vertical lock operation plate 11 is stopped, the vertical movement is possible, but the rotation allowance of the vertical lock operation plate 11 for locking the vertical movement is eliminated. In this case, the rotation allowance of the vertical lock operating plate 11 is made at the position where the lock interlocking shaft 25 and the vertical lock operating plate 11 are rotated,
If the vertical lock operation plate 11 is rotated in the opposite direction of the synchronous rotation, the axial positions of the lock interlocking cylinder 26 and the lock interlocking shaft 25 are displaced, and the lock is pushed to the camera mounting seat 4 and the rectilinear rail 3. It is possible. However, the operation direction of the vertical lock operating plate 11 differs depending on the rotation direction of the vertical moving barrel 10, in other words, the vertical moving direction of the camera mounting seat 4, and the operation may be lost, so the vertical lock operating plate 11 is not locked. Requires a click mechanism that overcomes the screw friction between the lock interlocking cylinder 26 and the lock interlocking shaft 25. Therefore, the rotation restricting portion of the lock interlocking shaft 25 is provided between the upper and lower lock operation plates 11 and the fixed screw cylinder 20, and the unlocking positioning click portion, that is, the protrusion 11 is provided.
b and the click hole 20b.

After a predetermined vertical movement, the vertical lock operation plate 11
When the lock interlocking shaft 25 rotates by pulling the lock interlocking barrel 26 and pulling the lock interlocking barrel 26 downward or pushing the lock interlocking barrel 26a upward, the lock interlocking barrel 26a pulls the camera mounting seat 4 downward so that the vertical moving barrel 10 moves. It absorbs the play in the feed screw and becomes locked.

In this locked state, since the camera mounting seat 4 is locked to the straight-moving rail 3, all the rattling from the straight-moving rail 3 to the camera mounting seat 4 is removed, and as a result, the rattling of the straight-moving guide of the camera-mounting screw portion. It will also disappear and you can perform a complete lock.

According to the above embodiment, the camera mounting seat 4 is moved forward and backward as a first moving mechanism which is movable in the optical axis direction, and the second moving mechanism which is movable in two directions orthogonal to the optical axis direction. The horizontal movement mechanism and the vertical movement mechanism as the third movement mechanism are provided, and movement adjustment can be performed independently in the three directions. Therefore, not only the original movement of the focusing rail in the optical axis direction but also the three-dimensional movement capable of moving in two directions orthogonal to the optical axis, for example, in the horizontal direction and the vertical direction, can be performed in order to simplify the composition setting for the photographing screen. it can. In addition, since it can be moved in two directions orthogonal to the optical axis, the composition can be set in these directions without being moved by a tripod or the like, which is very convenient.

Further, in the above construction, if each moving mechanism is constituted by a screw mechanism, it is possible to effectively prevent the weight from falling due to its own weight when moving in each direction, and it is possible to improve the operability. it can. In addition, since the structure of each moving mechanism uses screws, fine adjustment movement is possible, and it is possible to effectively prevent falling by its own weight and greatly improve fine adjustment operability.

Further, by arranging the camera mounting screw member 5 between the camera mounting seat 4 and the tripod mounting seat 1 so as to be freely rotatable, the rotation restricting linear key of the camera mounting seat 4 which moves up and down by a screw. As camera mounting screw member 5
Can be used. Therefore, since the straight-moving key is configured by diverting the component required to function as the focusing rail, that is, the camera mounting screw member 5, the structure is simple and the assembly / component cost is advantageous. Further, if the straight-movement key is arranged apart from the up-and-down moving cylinder 10 as the up-and-down movement adjusting member, the up-and-down movement adjusting member 10 due to the back-and-forth moving key play.
It is possible to reduce the play in the rotation direction.

In the above structure, if the vertical moving cylinder 10 is provided with the lock mechanism having the lock interlocking cylinder 26, the lock interlocking shaft 25 and the lock lever 11, the lock mechanism having good operability and stability. Can be achieved. Further, since the lock lever 11 is rotationally operated to lock the screw portion between the vertically movable cylinder 10 and the fixed screw cylinder 20 by axial tightening, the roundness of the screw is not broken. Deformation of parts can be prevented, and since the lock load is applied to the entire screw, the frictional contact surface is widened and a stable lock effect can be obtained. Further, the lock lever 11 can always be operated at a fixed position.

[Brief description of drawings]

FIG. 1 is a perspective view of a focusing rail according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the focusing rail along the optical axis direction.

FIG. 3 is a vertical sectional view of the focusing rail along the left-right direction.

4 is a vertical cross-sectional view of the focusing rail along the left-right direction at a position different from that of FIG.

FIG. 5 is an explanatory diagram showing a relationship between first and second bevel gears and a bearing.

FIG. 6 is an exploded perspective view showing a stopper and a lock mechanism in the vertical movement mechanism.

FIG. 7 is an explanatory diagram showing a case of normal snap photography.

8 is an explanatory diagram showing a composition in the case of snap photography in FIG. 7. FIG.

FIG. 9 is an explanatory diagram showing a case of close-up photography.

FIG. 10 is an explanatory diagram showing a composition in the case of close-up photography in FIG.

FIG. 11 is an explanatory diagram of how to move the camera in the case of close-up photography.

[Explanation of symbols]

1 ... Tripod mounting seat, 2 ... Shift seat, 3 ... Straight rail, 4 ...
Camera mounting seat, 5 ... Camera mounting screw, 6 ... Front / rear moving knob, 7 ... Front / rear locking screw, 8 ... Left / right moving knob, 9 ... Left / right locking screw, 10 ... Vertical moving barrel, 11 ... Vertical locking operation plate, 12 ... First umbrella Gears, 13 ... Second bevel gears, 14 ... Worm screws, 15 ... Bevel gear bearings, 16 ... Rack plates, 17 ...
Rack plate retainer, 18 ... Left and right drive screw mount, 19 ... Click mechanism, 20 ... Fixing screw cylinder, 21 ... Support cylinder, 22 ... Stopper ring, 23 ... Stopper ring retainer, 24 ... Stopper ring retainer screw, 25 ... Lock interlocking shaft , 26 ... lock interlocking tube, 27 ... rotation interlocking plate, 28 ... rotation interlocking tube, 2
9 ... Spring, 30 ... Straight guide ring.

Claims (6)

[Claims] 1. A camera mount (4) for mounting a camera
And a first moving mechanism (3, 6, 12, 13,) for moving the camera mounting seat (4) in the optical axis direction between the camera mounting seat (4) and the tripod mounting seat (1). 14,
16) and a second moving mechanism (2, 8,) for moving the camera mounting seat (4) in one direction orthogonal to the optical axis direction.
18) and a third moving mechanism (10, 2) for moving the camera mounting seat (4) in another direction orthogonal to the optical axis direction.
0) and a focusing rail. 2. The first moving mechanism (3, 6, 12, 1)
3, 14, 16) are left and right moving members (3, 16) that move in a plane orthogonal to the optical axis direction with respect to the tripod mounting seat (1) and the tripod mounting seat (1). 1) and the left / right moving member (3),
A left / right adjusting member (6) for moving the left / right moving member (3) with respect to the tripod mounting seat (1) by rotating operation.
The focusing rail according to claim 1, further comprising: 3. The second moving mechanism (2, 8, 18) comprises:
Any of the optical axis direction moving member (2) that moves in the optical axis direction with respect to the left and right moving members (3, 16), the left and right moving members (3, 16) and the optical axis direction moving member (2). The optical axis direction moving member (2) is arranged on one side and is rotated with respect to the left and right moving members (3, 16).
The focusing rail according to claim 2, further comprising an optical axis direction adjusting member (8) for moving the optical axis direction. 4. The fixing member (2) provided on the optical axis direction moving member (2), the third moving mechanism (10, 20).
0), screwed to the fixing member (20), rotatably supported on the lower surface of the camera mounting seat (4), and integrated with the camera mounting seat (4) in the vertical direction. The focusing rail according to claim 2 or 3, further comprising an up-and-down movement adjusting member (10) that moves to a vertical direction. 5. A camera mounting screw member (5) is rotatably disposed between the camera mounting seat (4) and the tripod mounting seat (1), and the camera mounting screw member (5) comprises:
Through holes (4) for guiding the camera mounting seat (4) in the vertical direction.
a) and the camera mounting seat (4) by being inserted into the vertical guide through holes (30a) of the tripod mounting seat (1), respectively.
With respect to the tripod mount (1), the third moving mechanism (1
0, 20), the camera mounting screw member (5) functions as a linear guide means for moving vertically with respect to the camera mounting seat (4) and the tripod mounting seat (1). The focusing rail according to claim 4, wherein the focusing rail is formed. 6. A screw lead of the vertical movement adjusting member (10) of the third moving mechanism (10, 20) is approximately the same as the screw lead on the inner surface, and is synchronized with the rotational vertical movement of the vertical movement adjusting member (10). Lock interlocking cylinder (2
6) and the screw lead of the vertical movement adjusting member (10) and the screw lead of the lock interlocking cylinder (26).
A lock interlocking shaft (25) screwed with the lock interlocking shaft (25), which is provided at the lower end of the lock interlocking shaft (25) and is rotated to rotate the lock interlocking shaft (25) with respect to the lock interlocking cylinder (26). By lowering the lock interlocking cylinder (26) to lower the camera mounting seat (4), the screw between the vertical movement adjusting member (10) and the fixing member (20) is crimped and the camera is mounted. Lock lever (11) for locking the vertical movement adjusting member (10) together with the mounting seat (4)
The focusing rail according to claim 4 or 5, further comprising: