JP2582824Y2 - Click mechanism of rotary operation type electric parts with switch - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary operation type electric component with a switch, for example, in which a switch unit for switching a power supply is combined with a variable resistor and the like, and a click feeling is generated at the time of operation. In particular, it relates to improvement of the click mechanism.

[0002]

2. Description of the Related Art When an operation shaft is rotated forward from an initial position by a predetermined amount, the power is switched from off to on. When the operation shaft is further rotated forward in the on state, the set resistance value fluctuates with a click feeling. The rotary type variable resistor with the power supply changeover switch is widely used in audio products and the like.

Such a variable resistor with a switch is used as a power supply switch, as in the conventional example disclosed in Japanese Utility Model Publication No. 1-22211 , as a resilient force of a reversing spring with rotation of an operation shaft. As a result, the movable contact piece performs a snap operation, and the snap operation causes the movable contact piece to be brought into contact with or separated from the fixed contact (terminal). A switch feeling is generated when the switch unit is switched on and off. When the operation shaft is rotated while the switch unit is in the ON state, the position of the slider with respect to the resistance substrate changes and the set resistance value can be adjusted while another click mechanism generates a click feeling. Generally, such a click mechanism includes a click plate made of a synthetic resin in which a large number of engagement protrusions are formed at a predetermined pitch, and resiliently contacts the click plate to engage and disengage with the engagement protrusion. A combination with a leaf spring having a bulging portion is used.

That is, as shown in FIG. 5, a conventional click mechanism of this type includes a flat portion 31 on a surface of a click plate 30 which rotates integrally with an operation shaft (not shown) along a circumferential direction. And a large number of engaging projections 32a, 32 having a predetermined pitch.
are formed on the other hand, while a leaf spring 33 held by a case (not shown) is formed with a bulging portion 34, which bulges the click plate 30. It is in elastic contact with the surface. When the operation shaft is at the initial position (rotation angle 0 degree), the bulging portion 34 elastically contacts the point A of the flat portion 31, and the operation shaft is sequentially rotated from the initial position by a predetermined amount to switch the switch unit (not shown). ) Is set so as to elastically contact the point B of the flat portion 31 when the switch unit is switched from the off state to the on state, so that the operation shaft is further rotated forward after the switch unit is switched to the on state. When this is done, the bulging portion 34 is brought into contact with the engaging protrusion 3 in accordance with the rotation angle of the operation shaft.
2a, 32b, 32c,... Are sequentially disengaged to generate a click sensation.
The rotation operation amount of the operation shaft can be sensed with fingers. The switch unit incorporates the reversing spring as described above, and the movable contact piece performs a snap operation. Therefore, the click feeling generated by the snap operation allows the operator to feel the on / off switching time. It has become.

[0005]

[Problems to be Solved by the Invention] By the way, in such a rotary operation type electric component with a switch , a snubber is attached to the movable contact piece.
A wire spring is used as a reversing spring to perform the
Have been. Generally, the spring force of wire spring is not so strong
When the power switch is turned on and off, the movable contact
The shock generated during the operation of the pump is relatively small, and
In addition, due to demands such as increasing the operating force, leaf springs
If the 33 need to increase the pressure torque arises there is a risk that a click feeling of its <br/> is not felt as sufficient strength. Therefore, it is conceivable to select a spring member which is rich in elastic force as reversing spring of the switch unit, the strength of the resilient force of the anti-diversion spring Melco was practically difficult. Also, after the reversing spring is reversed, its resilient force rotates forward.
To act as a biasing force, the leaf spring 33
30 slides at a high speed, and the engagement protrusion 32a generated immediately after the switch unit is switched to the ON state.
The click feeling due to the engagement and disengagement between the bulge 34
It will be easier. Clearly felt hard to say for the starting point is the operator of the click feeling after the on-state switching of the power supply for
The problems were Tsu there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a rotary operation type electric component with a switch which can reliably receive a click when switching from an off state to an on state or immediately thereafter. In providing a click mechanism.

[0007]

In order to achieve this object, the present invention comprises a rotatable operating shaft and a movable shaft which is resilient by a reversing spring when the operating shaft is rotated by a predetermined amount from an initial position. A switch unit in which the contact piece performs a snap operation to switch from an off state to an on state, a click plate having a large number of engagement protrusions formed on one surface at a predetermined pitch, and A leaf spring having a bulging portion engaged with and disengaged from the engagement projection, wherein the switch unit is turned on with the rotation of the operation shaft, and the click plate and the leaf spring are moved relative to each other. In a click mechanism of a rotary operation type electric component with a switch, which generates a click feeling by rotating the click unit, the leaf spring expands when the switch unit is turned on / off. Providing a projecting part that engages and disengages from the part Doo both projecting amount of deflection of the leaf springs required nearest the engaging projections when the bulged portion climbs over the raised portion, the required other engaging projection when overcoming the unit out bulging This is set so as to be larger than the amount of deflection of the leaf spring.

[0008]

According to the above means, the switch unit is turned on and off.
During off switching, co the movable contact piece by the elastic force of the reversing spring performs snap action, since the protrusion of the click plate and the bulging portion of the leaf spring will disengage, the operator Ru can be kantoku a sufficiently strong click feeling. Also, leaf spring
Engagement closest to the protrusion of the click plate where the bulge of
The protrusions are necessary for the bulging part to get over it.
When the bulging part gets over other engagement projections,
It is set to be larger than the required deflection amount,
Switch unit rides is the bulged portion closest engagement projections projections immediately after being replaced Ri switch from OFF to ON state Yue
Since click feeling is caused when obtaining the are strengthened intentionally than click feeling is caused thereafter, starting point of the click feeling in the on state becomes clear to the operator.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is an explanatory view of the operation of a click mechanism incorporated in a rotary operation type electric component with a switch according to the embodiment, FIG. 2 is a plan view of a click plate constituting the click mechanism, and FIG. Sectional view of the main parts of the parts,
FIG. 4 is a plan view of a power supply switch incorporated in the rotary operation type electric component.

The rotary operation type electric parts shown in these figures are:
A rotary variable resistor with a power switch, comprising a click mechanism 3, a switch unit 4, a resistor unit 5 and the like around an operation shaft 2 rotatably supported by a bearing 1. The power is turned on / off by the switch unit 4, and when the power is on, the set resistance value is adjusted by the resistor unit 5, and the click mechanism 3 generates a click feeling during operation. It is supposed to.

As shown in FIGS. 1 to 3, the click mechanism 3 includes a click plate 6 which rotates integrally with the operation shaft 2 and a leaf spring held by a first housing 7 which is a part of a case. 8, on the surface of the click plate 6, a projection 10 crossing the flat portion 9 and a large number of engagement projections 11a, 11b, 11c,... Is formed. On the other hand, a bulging portion 12 is formed in the leaf spring 8, and since the bulging portion 12 is in elastic contact with the surface of the click plate 6, the bulging portion 1 is
2 are disengaged from the projections 10 and the engagement projections 11a, 11b,... Then, as shown in FIGS. 1 and 2, when the operation shaft 2 is at the initial position (rotation angle 0 degree), the bulging portion 12 elastically contacts the point A of the flat portion 9, and the operation shaft 2 is moved from the initial position by a predetermined amount. When the switch unit 4 is switched from the off state to the on state by the forward rotation, the bulging portion 12 is set to be engaged with and disengaged from the protruding portion 10.
2 are sequentially engaged with and disengaged from the engagement protrusions 11a, 11b,... By further rotating the operation shaft 2 after the switch unit 4 is switched to the ON state, and thus the rotation of the operation shaft 2 in the ON state. The amount of operation can be sensed with a finger as a click feeling.

However, each of the engaging projections 11a, 11b,...
Are not all the same, and as is apparent from FIG. 1, the leaf spring 8 required when the bulging portion 12 gets over the engaging protrusion 11 a closest to the protrusion 10. The amount of bending s is different from the other engagement protrusions 11b, 11
c,..., the leaf spring 8 necessary when the bulging portion 12 gets over
Is set so that the click feeling generated by the engagement protrusion 11a is stronger than the click feeling generated by the other engagement protrusions 11b, 11c,... I have.

The switch unit 4 is shown in FIG.
As shown in FIG. 4, a driving body 13 that rotates integrally with the operation shaft 2
And an insulating cam 14 driven by the driving body 13;
A pair of terminals 15 and 16 are attached, an insulating substrate 18 integrated with a second housing 17 which is a part of a case, and a movable member which is always in contact with one terminal 15 and is in contact with and separated from the other terminal 16. A contact piece 19; a reversing wire spring 20 having one end locked to the insulating cam 14 and the other end locked to the movable contact piece 19; The movable contact piece 19 and the insulating cam 14 are sandwiched between the two.
14 is rotatably supported by a support shaft 21.

When the operation shaft 2 is at the initial position,
The insulating cam 14 is held in the state shown in FIG.
Since the movable contact piece 19 pulled by the insulating cam 14 through the terminal 0 is kept separated from the terminal 16 as a fixed contact, the switch unit 4 is in the off state,
When the operating shaft 2 is rotated forward from the initial position, the driving body 1
3, the insulating cam 14 rotates counterclockwise in FIG. As a result, when the insulating cam 14 rotates by a predetermined amount, the movable contact piece 19 performs a snap operation by the elastic force of the wire spring 20, and the movable contact piece 19 rotated clockwise in FIG. As a result, both terminals 15 and 16 are turned on, and the switch unit 4 is switched from the off state to the on state. If the operation shaft 2 is rotated in the reverse direction while the switch unit 4 is in the on state, the operation opposite to the above is performed, the movable contact piece 19 is separated from the terminal 16, and the state returns to the off state. Therefore, the switch unit 4 generates a click feeling by the snap operation of the movable contact piece 19 at the time of on / off switching, but at the time of on / off switching, as described above, the protrusion 10 of the click plate 6 and the expansion of the leaf spring 8. Outer part 12
Also, a click feeling due to disengagement is generated, so that the operator's finger feels a strong click feeling obtained by combining these.

As shown in FIG. 3, the resistor unit 5 includes a slider receiver 22 that rotates integrally with the operation shaft 2,
Sliders 23, 24 attached to both sides of this slider receiver 22
And a resistor (not shown) with which each of the sliders 23 and 24 slides.
, Terminals 26 and 27 are attached, and resistance substrates 28 and 29 are integrated with a third case 25 which is a part of a case, and the switch unit 4 is turned on. When the operating shaft 2 is rotated, each slider 23,
24 slides on the corresponding resistance substrates 28 and 29 so that the respective set resistance values fluctuate.

That is, when the operating shaft 2 is rotated forward from the initial position by a predetermined amount, the movable contact piece 19 performs a snap operation and is switched from the off state to the on state. At this time, a click feeling due to the snapping action and a click feeling due to the protrusion 10 are simultaneously generated. Therefore, even if the press-contact torque of the leaf spring 8 pressed against the click plate 6 is large, the operator can turn on with a sufficiently strong click feeling. -It is possible to reliably feel when switching off. Further, the click feeling generated by the engagement protrusions 11a immediately after switching from the off state to the on state is intentionally strengthened than the click feeling generated by the subsequent engagement protrusions 11b, 11c,. , For the operator, the starting point of the click feeling in the on state becomes clear,
Therefore, the amount of rotation operation of the operation shaft 2 can be easily grasped, and adjustment of the set resistance value can be easily performed.

[0017]

[Effect of the Invention] As described above, according to the present invention ,
The bulge of the leaf spring when switching the switch unit on and off
A projection portion which engages with and disengages from the click plate;
Necessary when the bulging part gets over the engaging projection closest to the part.
When the amount of deflection of the leaf spring is increased by the bulging portion of the leaf spring
Set to be larger than required deflection amount
When switching on / off the switch unit
The movable contact that snaps with the spring force of the reversing spring
That the click feeling, the protruding portion of the click plate is bulging portion of the leaf spring
Click feeling when disengaging from
Co If it is possible to kantoku reliably when Tsu bets on-off switching, the bulging portion is multiply the closest engagement projection with the protrusion
The click sensation that occurs when moving over
Since it intensified than clicking sensation that can start point of the click feeling in the on state becomes clear for the operator to easily grasp the rotational operation amount of the operation shaft.

[Brief description of the drawings]

FIG. 1 is an operation explanatory view of a click mechanism incorporated in a rotary operation type electric component with a switch according to an embodiment.

FIG. 2 is a plan view of a click plate constituting the click mechanism.

FIG. 3 is a sectional view of a main part of the rotary operation type electric component.

FIG. 4 is a plan view of a power supply switch incorporated in the rotary operation type electric component.

FIG. 5 is an operation explanatory view of a click mechanism according to a conventional example.

[Explanation of symbols]

 2 Operating shaft 3 Click mechanism 4 Switch unit 5 Resistor unit 6 Click plate 8 Leaf spring 10 Projection 11a, 11b, 11c, ... Engagement projection 12 Swelling part 19 Slider receiver 28, 29 Resistance board

Claims (1)

(57) [Scope of request for utility model registration] A movable contact piece performs a snap operation by a resilient force of a reversing spring , and is switched from an off state to an on state when the operation shaft is rotatable by a predetermined amount from an initial position. , A click plate having a large number of engagement protrusions formed on one surface at a predetermined pitch, and a bulging portion which resiliently contacts the click plate and engages with and disengages from the engagement protrusion. and a leaf spring, accompanied with the rotation of the operating shaft
In There the switch unit is turned on next the click plate and the plate spring and is relatively rotated to click mechanism having the switch rotary electric component a click feeling is caused <br/>, in the click plate , co providing a protrusion engages and disengages the protruding portion of the plate spring during on-off switching of the switch unit, a closest the engaging protrusion protrusion portion required for the expanded portion rides over A rotary operation type electric component with a switch, wherein the amount of deflection of the leaf spring is set to be larger than the amount of deflection of the leaf spring required when the bulging portion gets over another engagement protrusion. Click mechanism.