JP2000074041A - Lever operating force variable transmitting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the adjustment of operating force in a fader lever for editing video, so that the stable operating force can be maintained. SOLUTION: This mechanism has a turn lever 10 rotating a rotary shaft 12 connected to a rotation transmitting means and a variable means 7 variably generating operating force of the turn lever 10, the variable means 7 comprises a leaf spring member 14 interposition fastening both end faces of a rotary plate 11 integral with the rotary shaft 12 and an adjusting means 16 capable of adjusting interposition fastening force of the leaf spring member 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable operating force transmission mechanism capable of variably adjusting the operating force of a fader lever or the like in a fader device used in a video editing machine, for example.

[0002]

2. Description of the Related Art For example, in video editing, cut editing in which another image is inserted into a part of one video tape,
Operations such as roll editing for editing a plurality of video tapes to produce one video tape are controlled by a fader lever on a control panel.

For example, as shown in FIG. 4, by moving a fader lever 20 of a fader device 30 incorporated in a control unit of a video editing machine, a gear integrally attached to the end of a lever shaft (fader shaft) 22 is moved. (Not shown) is successively transmitted to other gears, rotates the rotary encoder 28, and video editing is performed by a pulse signal generated according to the rotation angle of the rotary encoder 28.

[0004] A disk-shaped damper 21 is provided integrally with the fader shaft 22, the brake is applied to the damper 21, the operating force of the fader lever 20 is adjusted appropriately, and the rotation angle of the lever 20 is controlled. It is easy to do.

A conventional damper mechanism 31 for varying the operating force of the fader lever 20 has a structure as shown in FIG.
For example, a 0.5 mm thick plate-shaped damper ring 24 is wound around the circumference of the damper 21 integrated with the fader shaft 22, and a lead portion 24 e of the damper ring 24 is drawn out.
Is controlled by the bolt 26 to adjust the operating force of the fader lever 20.

[0006]

However, in the above-mentioned conventional damper mechanism 31, since the operating force is changed by the strength of tightening the disk-shaped damper 21 by the damper ring 24, the tightening of the damper ring 24 is repeated. Each time, the damper ring 24 advances and does not return,
There has been a problem that the operating force gradually decreases even when the bolt 26 is in the same tightening position.

In view of the above, the present invention provides a stable lever operating force variable transmission mechanism in which the operating force of the lever is hardly reduced by changing the method of tightening the damper.

[0008]

A lever operating force variable transmission mechanism according to the present invention comprises a rotating lever for rotating a rotating shaft connected to the rotation transmitting means, and a variable means for varying the operating force of the rotating lever. The variable means includes a leaf spring member for clamping both end faces of the rotary plate integrated with the rotating shaft, and an adjusting means for adjusting a clamping force of the leaf spring member.

The lever operating force variable transmission mechanism according to the present invention is excellent in assembling workability since the operating force is stable because the set of the spring is small and the mechanism is simple.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A variable lever operating force transmission mechanism according to the present invention has a rotating lever for rotating a rotating shaft connected to a rotation transmitting means, and a variable means for varying the operating force of the rotating lever. The variable means comprises a leaf spring member for clamping both end faces of the rotary plate integrated with the rotating shaft, and an adjusting means for adjusting the clamping force of the leaf spring member.

Further, in the variable lever operating force transmission mechanism according to the present invention, the leaf spring member clamps both end surfaces of an inverted U-shaped rotating plate having both ends tapered, and adjusts the adjusting means. Consists of a spring receiving portion that receives the inner surfaces of the tapered ends of the leaf spring member, and an adjusting screw that slides the leaf spring member in the direction of the spring receiving portion. It is configured to adjust the clamping force by sliding while sliding.

Hereinafter, an embodiment of a lever operating force variable transmission mechanism of the present invention will be described with reference to the drawings. 1 and 2 show a case where the present invention is applied to a fader device incorporated in a control panel of a video editing machine. FIGS. 1A, 1B and 1C show a plan view, a front view and a rear view thereof. FIG. 2 shows an enlarged sectional structure of FIG.

The fader device 5 has a rotary encoder 18 disposed in a fader housing 4 and is arranged in parallel with the rotary shaft 3 of the rotary encoder 18.
A rotary shaft integrally mounted with a fader lever (so-called rotary lever) 10, that is, a fader shaft 12 is disposed so as to penetrate the fader housing 4, and is provided between the fader shaft 12 and the rotary shaft 3 of the rotary encoder 18.
Rotation of the fader lever 10 is controlled by the rotary encoder 1
For example, a gear mechanism 17 as rotation transmission means for transmitting the rotation to the rotation shaft 3 is provided.

The gear mechanism 17 has a circular first, second,
It comprises third gears 17A, 17B, 17C, a semicircular fourth gear 17D, and a circular fifth gear 17E. The first gear 17A is fixed to the fader shaft 12, the second gear 17B is fixed to the first shaft 2, the third gears 17C and 17D are coaxially fixed to the second shaft 1, The gear 17E is fixed to the rotating shaft 3 of the rotary encoder 18, the first gear 17A and the second gear 17B mesh, the second gear 17B and the third gear 17C mesh, and the fourth gear 17D Fifth gear 17
E meshes.

The fader lever 10 of the fader device 5
, The rotation of the first gear 17A fixed to the end of the fader shaft 12 causes the rotation of the second gear 17A.
B, the third gear 17C, the fourth gear 17D, and the fifth gear 17E are sequentially transmitted to rotate the rotary encoder 18 via the rotary shaft 3 connected to the fifth gear 17E, thereby rotating the rotary encoder 18. Video editing is performed by a pulse signal generated according to the angle.

The operation angle of the fader lever 10 is approximately 90 °, and a stopper is provided on the housing 4 as shown in FIG. 1C, and rubber stoppers 19 are provided on stopper portions at both ends for stopping the lever operation. Accordingly, the impact on the fader lever 10 can be reduced, which is preferable.

Thus, in this embodiment, in particular, the brake is applied to the rotation of the fader shaft 12,
A lever operation force variable transmission mechanism 7 serving as lever operation force variable means for facilitating control of the rotation angle of the fader lever 10 by appropriately adjusting the operation force of the fader lever 10.
Is provided.

The lever operating force variable transmission mechanism 7 is mounted on the fader shaft 12 and is a disk-shaped damper 1 which is a rotating body that rotates integrally with the fader shaft 12.
1, a spring member pressed against both end surfaces of the damper 11, that is, a damper spring 14, a receiving portion 15 for receiving a lower portion of the damper spring 14, and the damper spring 14 cooperating with the receiving portion 15.
And an adjusting screw 16 for adjusting the pressing force of the pressing member.

As shown in FIG. 3 and FIG.
A leaf spring member, for example, a stainless steel (SUS) 0.5 mm thick, that is, a damper spring 14, which has been given a clamping force (clamping force) by inwardly warping in advance, is press-fitted into both end surfaces of the. The damper spring 14 is formed of an inverted U-shaped member, and a lower portion (leg) 14f is formed by being bent outward in a tapered shape.

On the other hand, a spring receiving portion 15 for receiving the damper spring 14 is provided below the damper 11 with the damper spring 14 in contact with the inner surface of the tapered lower portion 14f. The leg portion 14f is arranged at a position where the leg portion 14f can be spread out as it is pushed down.

The operation of the variable lever operating force transmission mechanism 7 will be described. The both end surfaces 11s of the damper 11 are constantly tightened by a damper spring 14, and the frictional force suppresses the rotation of the damper 11, that is, the rotation of the fader lever 10 with an appropriate operation force.

The damper spring 14 is moved up and down by screwing in an adjusting screw 16 provided above, and a taper portion 14f of the damper spring 14 is provided with a tapered portion 14f provided below the damper 11 so that the upper surface of the spring receiving portion 15 is fixed. The damper spring 14 slides, and the damper spring 14 opens and closes to adjust the clamping force (clamping force) of the damper 11.

That is, when the adjusting screw 16 is screwed in, the damper spring 14 is lowered, and the lower portion 14f slides on the upper surface of the spring receiving portion 15 to open, thereby reducing the clamping force and lightening the operation of the fader lever 10. . Conversely, when the adjusting screw 16 is returned, the lower portion 14f of the damper spring 14 closes,
The operation of the fader lever 10 becomes heavy.

According to the present embodiment, even if the rotation of the fader lever 10 is repeated, a stable operation can be performed with little change in the operating force. Further, the load (clamping force) of the damper spring 14 applied to the damper 11 by the adjusting screw 16 can be easily adjusted, and the stability is high. Furthermore, damper 1
The first tightening mechanism is simplified, the thickness h of the operating force transmitting mechanism can be significantly reduced, and the work of assembling the lever operating force transmitting mechanism 7 is also facilitated.

In this embodiment, the present invention is applied to a fader device in a video editing machine. However, the present invention is also applied to a mechanism having a function of operating a lever and transmitting the rotation of a lever shaft integrated with the lever to another. it can.

[0026]

According to the lever operating force variable transmission mechanism of the present invention, a stable operation can be performed with little change in operating force even if the fader lever and the like are repeatedly rotated. In addition, since an adjusting means that can easily adjust the load (clamping force) of a leaf spring (damper spring or the like) applied to the rotating plate having the damper function by the adjusting screw is used, the operation is simple,
And high stability.

Further, since the lever operating force transmitting mechanism is of a spring fitting type, the thickness of the transmitting mechanism can be reduced, and the assembling work is also facilitated.

[Brief description of the drawings]

FIG. 1 is an external view of a lever operating force variable transmission mechanism according to the present invention. A Plan view B Front view C Rear view

FIG. 2 is an enlarged sectional view of a lever operating force variable transmission mechanism according to the present invention.

FIG. 3 is an explanatory diagram of a lever operating force variable transmission mechanism according to the present invention. A Assembly drawing of component parts B Assembly drawing

FIG. 4 is an operation explanatory view of the damper spring according to the present invention.

FIG. 5 is a configuration diagram of a main part of a conventional lever operation force variable transmission mechanism.

[Explanation of symbols]

Reference Signs List 5 fader device, 6,30 damper mechanism, 7 lever operation force variable transmission mechanism, 10,20 fader lever, 11,21 damper, 12,22 fader shaft, 14 damper spring, 15 spring receiving portion, 16
Adjustment screw, 17 gear, 18, 28 rotary encoder, 24 damper ring, 26 bolt

Claims (2)

[Claims] A rotating lever connected to a rotation transmitting means for rotating a rotating shaft; and a variable means for varying an operation force of the rotating lever, wherein the variable means is integrated with the rotating shaft. A lever operating force variable transmission mechanism comprising: a leaf spring member for clamping both end surfaces of a plate; and adjusting means for adjusting a clamping force of the leaf spring member. 2. The leaf spring member clamps both end faces of the rotating plate formed into an inverted U shape having both ends bent in a tapered shape, and the adjusting means includes a tapered shape of the leaf spring member. A spring receiving portion for receiving the inner surfaces of both ends of the plate spring member, and an adjusting screw for sliding the leaf spring member in the direction of the spring receiving portion, wherein both ends of the leaf spring member are slid while being in contact with the spring receiving portion. 2. The clamping force is adjusted by adjusting the clamping force.
3. The lever operating force variable transmission mechanism according to claim 1.