JP3520523B2 - Lens grip device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a lens device of a television camera which is placed on the shoulder of the photographer for television photographing when the photographer takes pictures outdoors, and the photographer grips the lens device to grasp the lens. The present invention relates to a lens grip device for performing an operation.

[0002]

2. Description of the Related Art A lens grip device to be mounted on a lens device of a television camera is designed so that when the photographer puts the television camera, which is composed of a camera body and a lens device, on the shoulder, the television camera is worn on the shoulder. It is configured to exert the above-mentioned stabilizing function and the function of operating the lens with the fingers of the hand holding the lens grip device. For this reason, the lens grip device has a housing that is detachably fixed to the lens device by screwing or the like, and the outer surface of the lens grip device serves as a grip portion. The lens driving means and the motor as the diaphragm driving means are built in, and a potentiometer for detecting the positions of these various lenses and diaphragms is also provided. These are drive-side constituent members, and switches for controlling the operation of the motors of these drive-side constituent members, operation-side constituent members including push buttons and other operating means, and the operation-side constituent members and the driving-side constituent members. An electric circuit board for connecting between the electric circuit board and the electric circuit board is mounted via a control circuit. Here, the driving side constituent member and the electric circuit board are provided in the housing, and the operation side constituent member is mounted in a state in which various switches and the like are unitized and led out to the outside from the wall surface of the housing as an operation unit, It can be operated with the fingers of the hand that holds the part.

In the housing of the lens grip device having such a structure, the grip portion has a shape such that the palm fits at a predetermined position when the photographer grips it. When it is placed on and gripped, the hand is not in a state of being orthogonal to the axis of the television camera, but can be gripped more easily if it is tilted slightly forward, that is, toward the subject side. Since it has good operability, it has a shape that fits when the palm is applied in this direction.

Here, the optimum tilt angle of the above-mentioned grip portion is not uniform depending on the photographer, but differs slightly depending on the individual characteristics and the like. Further, the optimum tilt angle of the grip portion changes depending on the direction of the subject, that is, when the lens device is imaged upward and when it is imaged downward. For this reason, a structure in which the tilt angle of the grip portion of the lens grip device can be adjusted is known as disclosed in, for example, Japanese Utility Model Laid-Open No. 63-106276. In this known lens grip device, a housing that constitutes the lens grip device is divided into two, and is composed of a base-side member fixed to the lens device and a cover-side member joined to the base-side member. , The drive side constituent member is provided on the base side member,
Further, the operation unit and the electric circuit board are mounted on the member on the cover side. Then, the base end side of the member on the cover side,
That is, a rotation shaft that is rotatably connected to a base member is provided at an upper position on the side that is connected to the camera body, and the cover-side member is attached to the base-side member about this rotation shaft. The angle of the member on the cover side can be adjusted by shifting it. Furthermore, in order to fix the member on the cover side with the angle adjusted in this way,
A locking pin is provided, the connected state is released by the locking pin, the angle is adjusted, and then both members can be connected / fixed.

[0005]

By the way, in the above-mentioned prior art, when adjusting the grip angle,
Since it is necessary to attach / detach the locking pin, the operation for adjusting the angle is not only troublesome, but also the cover-side member and the base-side member are connected by the rotation shaft and the locking pin. Since the photographer grips and operates the cover member while being held in a state, an excessive load may be applied to the rotary shaft and the locking pin when the lens device is operated, which may cause deformation or damage. There is a drawback that there is. Moreover, since the center of rotation is at the corner of the cover member, when the cover member is rotated, the amount of deviation of the corner between the center of rotation and the corner diagonally relative to the base member is extremely large. However, since the center position of the cover member may be shifted vertically, the stability of the cover member is impaired when the photographer grips it, and if the photographer takes a long time. There are also drawbacks such as increased fatigue.

The present invention has been made to solve the above-mentioned drawbacks and problems of the prior art. The purpose of the present invention is to easily adjust the angle of the grip portion, and It is an object of the present invention to provide a lens grip device capable of maintaining a stable connection between a cover member and a base member.

[0007]

In order to achieve the above-mentioned object, the present invention provides a lens grip device including a base member fixed to a lens device and a cover member detachably connected to the base member. Make up the housing and base
A pillar is erected on the member, and the upper end surface of this pillar and the cover member
Are connected by a connecting means so that they can rotate relative to each other.
Install a friction plate on the top of the pillar and
Provide a friction plate that is pressed against the friction plate on the support side on the surface and connect
When the cover member is connected to the base member by the means,
A frictional engagement force is exerted between both friction plates.
Position the cover member and the base member in a predetermined rotation position
A positioning means for determining the position is provided, and this positioning means
Can be engaged and disengaged with the frictional engagement force acting between both friction plates
Its characteristic is that it has an effective configuration.

[0008]

In normal operation, the cover member does not separate from the base member due to the action of the connecting means, and the friction plate
The cover member is coupled and fixed to the base member in an extremely stable state without the relative displacement of the cover member with respect to the base member due to the frictional engagement force between them and the action of the positioning means. When the lens device is operated, a force is applied to the cover member, but most of this force comes from between the friction plates.
Since the nest by, it can take no excessive load on the connection means and positioning means.

In order to adjust the inclination angle of the grip portion in this lens grip device, the engagement between the connecting means and the friction plate is left as it is, the engagement of the positioning means is released, and the cover member is connected to the connecting means. Forced rotation as the center. As a result, the friction plates are slidably displaced, and the cover member rotates about the position where the connecting means is disposed. When the cover member reaches the predetermined angle state, the positioning means is returned to the engaged state again. by this,
The cover member is stable at the angular position.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, FIG. 1 shows the overall appearance of a television camera, and FIG. 2 shows the appearance of a lens device equipped with a lens grip device. As you can see from these figures,
The television camera is configured by detachably mounting a lens device 2 on a camera device 1, and the camera device 1 is provided with a recessed portion 1a for mounting a shoulder of a photographer. A lens grip device 3 is detachably attached to the lens device 2. Therefore, the photographer can mount the concave portion 1a of the camera device 1 on the shoulder and grip the lens grip device 3 to hold the television camera in a stable state and appropriately carry it while taking a picture. ing.

Here, the lens grip device 3 has both a function for stably holding the television camera and a function as an operating means of the lens device 2. In order to exert the camera holding function, in the lens grip device 3, the outer surface of the cover member 11 described later is a grip portion 4 with which a palm holding the contact portion abuts. At the position of, a protrusion 5 is formed for sandwiching between the thumb and the index finger,
In addition, a band 7 that abuts the back of the hand is installed between the protrusion 5 and the attachment portion 6 provided on the tip side.

Next, the function of the lens device 2 as the operating means will be described with reference to FIGS. As is apparent from these drawings, the lens grip device 3 has a housing 12 formed of a base member 10 and a cover member 11 which are joined to each other. The base member 10 is
It is removably fixed to the side surface of the lens device 2 by means such as screws, and inside thereof, as apparent from FIG. 5, the zoom motor 13 for driving the zoom lens and the position of the zoom lens are detected. A zoom potentiometer 14, a focus motor 15 for driving the focus lens, a focus potentiometer 16 for detecting the position of the focus lens, an iris motor 17 for driving the diaphragm, and an iris position detection potentiometer 18. Is provided. They are,
It is a driving side constituent member related to a mechanism for driving the lens and the diaphragm. Further, the cover member 11 is composed of a seesaw switch 19, various other switches, push buttons (not shown), etc. at the upper position thereof, and is an operation means for the photographer to operate the lens and diaphragm. An operation means unit 20 in which the operation-side constituent member is unitized is provided inside, and a through hole 21 formed in an upper portion of the cover member 11 is provided.
Etc. to the outside. The operation unit 20 is connected to the zoom motor 13, the focus motor 15, and the iris motor 17 via an operation control mechanism, which is mounted on the electric circuit board 22. Therefore, the operating unit 20
And the electric circuit board 22, and the zoom motor 13,
Zoom potentiometer 14, focus motor 1
5, a wiring cable is connected between the focusing potentiometer 16, the iris motor 17, and the iris position detecting potentiometer 18.

Next, the cover member 11 is connected and fixed to the base member 10 so that the angle can be adjusted. For this purpose, a connecting means, a friction engaging means, and a positioning means are provided between the members 10 and 11.

First, as the connecting means, the base member 10 is used.
The pillars 23 are erected on the cover member 11, and
In addition, the through hole 25 is formed in the recess 24, the connecting bolt 26 is inserted into the through hole 25, and the connecting bolt 26 is screwed into the column 23. Therefore, the cover member 11 is connected to the base member 10 by the connecting bolt 26, and if the connecting bolt 26 is detached, the cover member 11 is removed.
Can be separated from the base member 10. Further, the head portion 26a of the connecting bolt 26 is located in the recess 24, so that when the palm is applied to the surface of the cover member 11, a feeling of foreign matter is not caused.

Next, the friction engagement means is a friction plate 27 provided on the upper end surface of the support column 23 and the recess 2 in the cover member 11.
And a friction plate 28 fixedly provided on the inner surface of the forming portion of No. 4. The friction plates 27, 28 are attached to each other by the tightening force of the connecting bolt 26 as a connecting means.
A frictional engagement force is obtained by the pressure contact force between the two. Here, if the tightening force of the connecting bolt 26 is increased, the frictional engagement force is increased accordingly. However, as will be described later, the cover member 11 is rotated relative to the base member 10 without loosening the connecting bolt 26, and the angle is increased. Since the adjustment is performed, the tightening force by the connecting bolt 26 has a frictional engagement force that can be sufficiently held even when an ordinary external force is applied to the cover member 11 at the time of photographing, and is forced by a force larger than that. Adjust so that it can slide when rotated.

Further, the positioning means is for maintaining the cover member 11 forming the grip portion in the state of being adjusted to the optimum inclination angle by rotating the cover member 11 around the mounting position of the connecting bolt 26. Is.
As the positioning means, a portion of the base member 10 and the cover member 11 on the base end side, that is, a predetermined angle of a portion on the side of continuous connection to the camera device 1 is formed into an arc shape centered on the mounting position of the connecting bolt 26. A plurality of square grooves 29 are formed on the base member 10 side to form positioning recesses along the arc, and on the cover member 11 side, pins 30 are selectively engaged with the square grooves 29. It is formed by providing.
And, without loosening the connecting bolt 26, this pin 30
The pin 3 so that it can be engaged with and disengaged from the square groove 29.
As shown in FIG. 7, 0 is inserted into a bush 31 fixedly provided on the inner surface of the cover member 11, and is slidable along the bush 31. Normally, the pin 30 has a spring 32 compressed between the step portion 30a and the step portion 31a of the bush 31.
The engaging portion 30b formed by chamfering the tip end is biased in the direction in which it engages in the square groove 29, and when it is slid and displaced in the direction against the biasing force of the spring 32, The joint portion 30b can be detached from the square groove 29. In order to enable the engagement portion 30b to be disengaged from the square groove 29, the shaft 30a of the operation knob 33 is attached to the pin 30.
Are connected. The operation knob 33 is provided on the cover member 11
Is provided outside the side surface of the shaft 3
3a is located inside the cover member 11 and is connected to the pin 30 through a long hole 34 which is elongated in the displacement direction of the pin 30 formed in the cover member 11. Therefore, by operating the operation knob 33 to push it up with a finger, the pin 30 is displaced in the direction against the spring 32, and the engaging portion 30b is disengaged from the square groove 29.

Further, the electric circuit board 2 is connected between the operating side constituent member and the driving side constituent member by a wiring cable.
The column 2 is inserted into the column 23 and is mounted in a state of being inclined at a predetermined angle. The spring 35 holds the step portion 23a provided on the support column 23 in contact with the step portion 23a. When the cover member 11 is rotated, the electric circuit board 22 is also rotated so as to follow it. It has become.

The present embodiment is constructed as described above, and when the connecting bolt 26 is screwed into the support column 25, the head portion 26a of the connecting bolt 26 forms the recess 24 of the cover member 11. By pressing, the friction plate 28 on the side of the cover member 11 is brought into pressure contact with the friction plate 27 attached to the column 23 standing upright from the base member 10. Further, the pin 30 is held in a state of being engaged with the predetermined square groove 29 by the spring 32 acting on it. As a result, the cover member 11 is firmly fixed to the base member 10, and an external force is applied to the cover member 11 when the lens device 2 is operated by inserting the hand through the band 7 provided on the cover member 11. Even if added, it is not separated from the base member 10 or displaced, and is fixed in a stable state. Also,
Most of the external force acting on the cover member 11 is received by the frictional engaging force acting between the friction plates 27 and 28, so that it is possible to prevent the connection bolt 26 and the pin 30 from being loaded, These deformations and damages can be prevented.

Therefore, in order to adjust the angle of the cover member 11 so as to face upward or downward according to the individuality of the photographer, the relationship with the subject, etc., first, the pin 30 is operated by operating the operation knob 33. Detach from the square groove 29.
In this state, the cover member 11 is connected to the connecting bolt 2 with a force larger than the force normally applied when operating the lens device 2.
6 is forcibly rotated about the mounting portion. As a result, the friction plate 28 slides on the friction plate 29, and the angle of the cover member 11 is adjusted. And
When the cover member 11 is in a desired angle state, the pin 30
When the pin is returned, the pin 30 engages with the square groove 29 provided at that position, and the cover member 11 is fixed at that position. Thus, since it is not necessary to loosen the connecting bolt 26 when adjusting the angle of the cover member 11, this work can be easily performed without using a special tool or the like. Further, after the angle adjustment, the pin 30 engages with the square groove 29, and the friction engagement force between the pin 30 and the friction plates 27 and 28 prevents the cover member 11 from being displaced with respect to the base member 10. , Kept very stable.

Here, the base member 10 and the cover member 1
1 is an arc shape for a predetermined angle on the camera device 1 side, this portion is a cover member 1
There is no deviation in the outer shape of both members 10 and 11 before and after the angle adjustment of No. 1, and the object side part is also rounded so that the deviation of the cover member 11 from the base member 10 is minimized. , Should not be unsightly in appearance. Further, as is apparent from FIG. 2, the connecting bolt 26 is provided at a substantially central position in the grip portion 4, so that the palm of the grip portion 4 can be touched even after the angle adjustment. The position of the position in the height direction of the lens device 2 hardly changes, and the hand holding the grip portion 4 becomes stable,
Even if you operate it for a long time, you will not get tired.

The electric circuit board 22 is the base member 10
Since it is mounted on the column 23 standing upright, it is possible to easily perform the work of connecting the various drive side constituent members mounted on the base member 10 and the wiring cables in the operation unit 20 to the electric circuit board 22. You can

In the above-mentioned embodiment, the pin having the chamfered portion at the tip is constituted to be engaged with the square groove as the positioning means. However, as shown in FIG. It is also possible to form the engaging portion 30b 'at the tip of the ′ in a V-shape and make the groove engaged with the engaging portion 30b ′ the V-shaped groove 29 ′. In addition, as shown in FIG.
The click member 41 that engages and disengages with the click spring 42 may be urged in the direction of engaging the groove 40.
In this case, when adjusting the angle, the friction plate 2
It suffices to apply a force larger than the frictional engagement force between 7 and 28 and the force of the click spring 42 that acts on the click member 41, and since the operation of pulling up the operation knob is not necessary, the operability of angle adjustment is further improved. To do.

[0023]

Since the present invention is constructed as described above,
The bar member is rotated by the desired angle with respect to the base member.
In this state, the cover member and the base member can be extremely firmly fixed to each other, even if a slight external force is applied, the position does not shift unintentionally, and the angle adjustment of the grip portion does not use a special tool or the like. It has various effects such as being easily performed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a television camera equipped with a lens grip device.

FIG. 2 is a front view of a lens device equipped with a lens grip device.

FIG. 3 is a left side view of the lens grip device.

FIG. 4 is a left side view of the lens grip device showing a state in which a cover member is separated from a base member.

5 is a view as seen from the direction of arrow X in FIG.

FIG. 6 is a view as seen from the direction of arrow Y in FIG.

FIG. 7 is a cross-sectional view showing a connecting mechanism between a cover member and a base member.

FIG. 8 is a sectional view showing another example of positioning means.

FIG. 9 is a sectional view showing still another example of the positioning means.

[Explanation of symbols]

1 camera device 2 lens device 3 lens grip device 4 Grip part 10 Base member 11 Cover member 12 housing 20 Operation unit 22 Electric circuit board 23 props 24 recess 26 Connecting bolt 27, 28 Friction plate 29 Square groove 29 'V-shaped groove 30,30 'pin 31 bush 32 springs 33 Operation knob 34 long hole 40 grooves 41 Click member 42 click spring

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 5/225 G03B 17/56

Claims (6)

(57) [Claims] 1. A driving-side constituent member including a housing fixed to a lens device of a television camera, a driving motor for a zoom lens and a focus lens, and a mechanism for detecting the position of each lens in the housing. A lens gripping device equipped with an operation side component including a switch for operating each of the drive side components, and an electric circuit board to which a wiring cable from the drive side component and the operation side component is connected, wherein the housing Is composed of a base member fixed to the lens device and a cover member detachably connected to the base member, a pillar is erected on the base member, and an upper end surface of the pillar is provided.
A relative rotation between the cover member and the cover member is possible.
The friction plate is connected to the upper end of the column,
A friction plate that is pressed against the friction plate is provided on the inner surface of the cover member.
Then, the connecting member connects the cover member to the base member.
Friction engagement force is exerted between both friction plates when connected to
No way, further during a predetermined of said cover member and said base member
Providing positioning means for positioning at the rotating position,
The positioning means has a frictional engagement force acting between the friction plates.
The lens grip device is characterized in that it can be engaged and disengaged in the state of being held . 2. The lens grip device according to claim 1, wherein the connecting means is provided at a substantially central portion of the cover member and at a substantially intermediate position in a vertical direction of the lens device. Wherein by mounting the operating side structure member to the cover member, and KataSo the drive-side component member to the base member, and provided upright posts from the base member side, the said electrical circuit board The cover member is rotatably mounted around the support member in accordance with the rotation of the cover member , a connecting bolt as a connecting means is screwed into the column, and the upper end surface of the column is connected to the inner surface of the cover member. The lens grip device according to claim 1, wherein a friction plate that constitutes the friction engagement means is mounted around the insertion portion of the bolt. 4. A joint surface between the cover member and the base member
At least a part of the connection means is centered on the arrangement position of the connection means.
No circular or arc shape, and at the joint of both
Is multiple positions along the circle or arc of the member on one side.
2. The arrangement according to claim 1, wherein the arrangement section is provided.
The described lens grip device. 5. The positioning portion is a circle of the member on the one side.
Or a plurality of positioning recesses along the arc and the other side
The position of selectively engaging these positioning recesses with the member of
The lens grip device according to claim 4, wherein the lens grip device is configured with a deciding pin . 6. The positioning portion is a circle of the member on the one side.
Or a plurality of positioning recesses along the arc and the other side
To the members of the above to selectively engage these positioning recesses.
5. A locking member according to claim 4,
Lens grip device.