JPS607640A - Control lever device - Google Patents

Abstract

PURPOSE:To make the adjustment of assembling easy and to reduce the size of the titled device by using a heat resisting element consisting of a shape storage alloy as a lever driving source and heating and controlling the heat responding element directly by current supply or the like. CONSTITUTION:If current is supplied between electrodes 21a, 21b of a heat responding element 3 e.g. to be actuated out of heat responding elements 3-5 and heat is generated, the heat responding element 3 can be restored up to a rectangularly bent working position by shape restoring force based upon martensite reverse transformation. If the point of the heat responding element 3 is engaged with a ratchet mechanism 10 or the like, a clatch is disconnected and e.g. motor driving is controlled. If current supply is stopped and the temperature is reduced, the heat responding element 3 is returned to the original martenside phase and restored to a non-operating position by the repulsing force of a return spring 15. Thus, the adjustment of assembling of the device is made easy and the side of the device can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control lever device used in electrical equipment such as video television cameras and audio equipment.

Among the control knobs used in electrical equipment.

This is the so-called feather touch switch.

The solenoid ilK is operated by an electric signal, and the lever is fully moved by electromagnetic force to control the rotation of the motor and the operation of other electric parts.

However, the solenoid makes a loud banging noise when activated. In addition, in the case of a solenoid, the operating force changes greatly depending on the suction distance of the plant, so one high-viscosity unit is required at the probe position.
There was paddy.

The present invention was made based on the above circumstances.

The purpose is to provide a control lever mounting device that is lightweight, does not generate knocking noise, and is easy to adjust the book layout by using shape memory alloy instead of conventional solenoids. (-There is.

That is, the present invention is made of an alloy having a shape of 1.

And the shape memory effect so that it is restored to the predetermined operating position at the temperature that causes martensitic reverse transformation? The shape memory thermoresponsive element and the martensitic phase (when cold)
a return spring that moves the element to the inoperative position when .

This control lever device is characterized in that it is completely equipped with an energizing heating means for heating the above-mentioned element to a temperature that causes martensitic reverse transformation.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 indicates the entire mounting board, and a part of the mounting board 1 has a plurality of (three locations in the figure) mounting portions 1a,
lb and lc are provided in a stepped manner. Further, the mounting board 1 is fixed to the chassis 2 or is formed integrally with the chassis 2.

The mounting board 1 includes each mounting portion Ja.

lb, lcl2, shape memory thermal response element 3゜4.
5, 6, 7, and 8 fasteners exclusively for screws or bolts are used.

Each shape memory thermally responsive element 3, 4.5 has a strip shape and is made of a shape memory alloy such as a Ti--Ni alloy. In the first stage, as shown in Figure 1, lever capitals 3a, 4a, 5
A is in a straight line state (non-operating position), but for example, from 60°
When heating to about 80C causes martensite reverse transformation to the austenite phase, each lever capital 3a.

4a and 5a are, for example, C:, as shown in FIG. 3, and have a shape memory sound effect that restores the shape to a curved or angular shape (operating position). And in the case of the tree example, each lever city 3
At the operating position of a, a, 5a in the austenite phase, a ratchet mechanism 10. is an example of an object to be operated. II, 12 are arranged. For example, as shown in FIG. 3, when the tip of the lever engages the ratchets Ph and Mtr 10, the clutch is engaged/disconnected and, for example, the drive of the motor is controlled.

In addition, the upper Nt V bar fa a a , 3 b ,
3c may be formed integrally using a single shape memory alloy plate to reduce the number of parts and facilitate assembly, or alternatively, each may be formed separately to avoid expensive The use of shape memory alloys may be saved.

Further, the shape memory thermally responsive elements 3a and 3b.

3c, a plate-shaped return spring 15,
They are fastened together to the mounting board 1 using fasteners 6 and 7.8. These return springs 15, 16
．． 17, when the thermally responsive elements 3, 4.5 are in the martensitic phase, each thermally responsive element 3, 4.5 is in the martensitic phase as shown in FIG.
5 Push back to full straight line state (non-operating position) or thermally responsive element? , 4, and 5, when reverse martensitic transformation occurs and the shape restoring force is fully exerted, it is pushed by that force and bends as shown in Figure 3.

The thermally responsive elements 3, 4.5 are provided with electrodes 21a, 21b, 22a, 2, which partially and entirely constitute the energization heating means 20 for heating to a temperature that causes martensitic reverse transformation.
2b, 23a.

23b has been taken. As shown in FIG.
z connected to one pole of the t source 26 through the other electrode 2
1b, 22b, 23b are lead wires 27, 28.
29'f: is connected to the circuit control unit 3θ through the circuit control unit 3θ, and this circuit side oblique portion 30 is connected to the other pole of the power source 26 through the voltage control #11 and 31 wires. Reference numeral 32 is a sensor that senses the ambient temperature, and based on the temperature signal detected by this sensor 32, pressure control is performed so that the voltage waveform as shown in Figure @4 is obtained, and each thermally responsive element J g
4 + J's operating speed (responsiveness) has been increased (2).

Incidentally, can one sensor 32 be used to control the entire thermal response element 3°4.5? If the operating conditions are favorable, the IJ may be provided with individual sensors 32 for sensing the heat generation temperature of the 6 thermally responsive elements 3.4.5 themselves.

This fire engine example 01 configured as above. Between each car pole (
The hatched area in Figure 2) is the turtle area. Therefore, 1 thermally responsive element 3 (or 4
Alternatively, if heat is generated by passing the heat between the electrodes in step 5), the shape restoring force caused by martensitic reverse transformation can restore the desired heat-responsive element 3 (or 4 or 5) to its full operating position, allowing it to be used as a ratchet or other device. Object to be manipulated? Can it be manipulated? What is the voltage waveform during this period?

As shown in FIG. 4, the entire voltage immediately after the start of energization can be temporarily reduced (2), thereby making it possible to reduce the operating speed.

On the other hand, when one cycle is stopped and the temperature W + decreases, the temperature returns to the original martensitic phase, and the repulsive force of the return spring 15 (or 16 or 17) returns to the non-operating position.

In addition, J Accessories may be used to carry out the present invention without departing from the gist of the present invention.
Configuration of shape memory thermal response element, return spring, energizing heating means, operated object, etc.

It goes without saying that the specific aspects such as the shape can be modified in various ways.

As explained above, the present invention has a twist in that it uses a thermally responsive element made of a shape memory alloy instead of the conventional solenoid. It is used as a lever driving source, and is operated by controlling the heating of this thermally responsive element by direct current heating or the like.

Therefore, according to the present invention, it is possible to significantly reduce the weight compared to those using solenoids, and there is no tapping noise. In addition, unlike a solenoid, there is no problem that the operating force fluctuates depending on the suction distance of the nib plunger, and the operating force can be kept constant to a certain extent. Therefore, the accuracy of the assembly position is eased, and the tax assignment is made easier. Tomo (2) Fire earth has great effects, such as easier adjustment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side I/1 view;
Figure 2 is a bottom view, Figure 3 is a side view showing the operating state of a part of the lever, Figure 4 is a diagram showing the voltage waveform of the heating aid, and Figure 5 is a schematic diagram of the circuit used for trace heating. It is. 3.4.5...Shape memory thermal response element, 15!16.1
7...Return spring, 20...Electrification heating means. QA (1ゎゎ ka8・q・−9El Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office■, Indication of the case Japanese Patent Application No. 114711/1988 2, Name of the invention Control lever device 3, Relationship with the amended person case Patent Applicant (464) NHK Spring Co., Ltd. 4, Agent 6, 5””-> in the specification to be amended, L 7, Contents of amendment (1) The scope of claims is corrected as shown in the attached sheet. (2) On page 4, line 18 of the specification, [3b, 3c
Correct the text "J" to "4a, 5a". (31, page 5, lines 4 and 5, “3n, 3b,
Correct 3cj to ``3, 4, 5.'' 2 Claims (1) A shape-memory thermo-responsive element made of a shape-memory alloy and having a shape-memory effect of restoring to a predetermined operating position at a temperature that causes reverse martensitic transformation; a return spring for moving the thermally responsive element to a non-operating position when the thermally responsive element is in the martensitic phase; and a current supply and heating means for heating the shape memory thermally responsive element to a temperature at which reverse martensitic transformation occurs; A control lever device featuring:

Claims (1)

[Claims] (1) A shape-memory thermo-responsive element made of a shape-memory alloy and having a shape-memory sound effect that returns to a predetermined operating position (returning to its original state) at a temperature that causes martensitic reverse transformation, and the shape-memory thermo-responsive element A control lever characterized in that it is fully equipped with a return spring that moves the thermally responsive element to a fully inactive position when in the site phase, and an energizing heating means that heats the shape memory thermally responsive element to a temperature that causes reverse martensitic transformation. Apparatus. There is a % sign and a sul control lever device.