JP2002352669A - Switch having seesaw movable contact piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch having a seesaw movable contact pieces with high withstand voltage. SOLUTION: A supporting piece 60 having an upper end projected most at the center is vertically fixed at the substantially center part of a bottom plate 12 within an insulating case 10, and the movable contact piece 50 is rotatably mounted on the upper end side. Two movable contactors 50C1 and 50C2 are mounted with an interval in a rotation center direction at one end of the movable contact piece 50. Two fixed contact pieces 701 and 702 having each of fixed contactors 70C1 and 70C2 are mounted at positions facing the movable contactors 50C1 and 50C2 on the bottom plate 12. Terminals 7T1 and 7T2 of the two fixed contact pieces 701 and 702 passing through the bottom plate 12, project to the outside and are made as terminals of the switch to constitute two series switches via the movable contact piece 50 between the two terminals 7T1 and 7T2 . Two sliding projections 461 and 462 of a driving piece 46 slide on an upper surface of the movable contact piece 50 by a rotatable operating element 40 to simultaneously turn on/off the two series switches.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a switch having a seesaw type movable contact piece.

[0002]

1A and 1B show an example of a conventional vertical sectional view parallel to the long side and a sectional view perpendicular to the short side of a switch having a seesaw-moving movable contact piece. A metal support plate 60 is vertically fixed substantially at the center of the bottom plate 12 of the box-shaped case 10 made of insulating resin. On both sides of the upper end sides of the supporting plate 60, _first guide protrusions 61 protruding upward, 61 ₂ are formed, pivotably movable contact piece 50 is placed between the guide projections 61 ₁ and 61 _2. The upper end side of the support plate 60 acts as a fulcrum for the swing of the movable contact piece 50, and the lower end portion of the support plate 60 protruding out of the bottom plate 12 is movable and electrically connected to the movable contact piece 50 by contact. A contact-side terminal 6T is formed.

A movable contact 50C is attached to the lower surface of one end of the movable contact piece 50. Inverted L-shaped fixing piece 70
Are arranged on the case bottom plate 12 such that the upper plate portion 72 faces the lower surface of the movable contact piece 50, and the leg portion of the fixed contact piece 70 penetrates the bottom plate 12 as the fixed contact side terminal 7T and projects downward. ing. The fixed contact 70C is attached to the upper plate portion 72 of the fixed contact 70 so as to face the movable contact 50C. A tumbler-shaped operation element 40 is arranged above the movable contact piece 50 so as to close the upper opening 10A of the case 10. A rotation shaft 47 formed on the side wall of the operation element 40 is rotatably mounted in a bearing hole 16 formed on the side wall 11 of the case 10. A cylindrical portion 42 is integrally formed to extend downward from the center of the lower surface of the tumbler 41 of the operation element 40, and a spring receiving hole 42A formed by the cylindrical portion 42 is formed.
The coil spring 45 is arrange | positioned inside. The upper end of the plunger 43 that engages with the lower end of the coil spring 45 is inserted into the spring receiving hole 42A, and a bias force is applied downward by the coil spring 45. Plunger 43 due to its eccentric force
Lower end of the movable contact piece 50 constantly presses the upper surface of the movable contact piece 50 to slidably engage.

FIG. 1A shows a state in which a tumbler-type operation element 40 is pressed to a switch OFF. By pressing down, the movable contact 50C and the fixed contact 70C are stably held in an open state, and therefore, the terminals 6T and 7T are in a non-conductive state. When the operation element 40 is pressed to switch ON, the operation element 40 rotates clockwise around the shaft 47 in the figure, and the rotation causes the plunger 4 to rotate.
3 has a movable contact piece 50 against the pressure of the coil spring 45.
Slides on the upper surface of the support plate 60 and climbs toward the upper end of the support plate 60, and moves to the movable contact 50C side beyond the upper end, the movable contact piece 50 rotates, and the movable contact 50C and the fixed contact 70C come into contact with each other. In contact, the switch is stably held in that state. As a result, the conduction between the terminals 7T and 6T is maintained.

[0005]

In this conventional switch, the lower surface of the movable contact piece 50 and the upper straight line of the support plate 60 are in contact with each other. However, in actuality, perfect line contact cannot be realized. Point contact at multiple points. In addition, the position of the contact point changes with the rotation of the movable contact piece, and the contact point moves due to mechanical shock or vibration, so that the electrical stability of the switch is not satisfactory. Further, since almost the entire voltage between the terminals 7T and 6T is applied between the contacts 50C and 70C, there is a drawback that the contacts 50C and 70C are greatly worn by the discharge spark generated at the time of contact and separation.

An object of the present invention is to provide a switch having a seesaw-type movable contact piece which has a high withstand voltage, little wear of a contact due to a spark at the time of switch switching, and is electrically stable.

[0007]

According to the present invention, there is provided a switch having a box-shaped case having an insulating bottom plate and having an opening on an upper surface, and a central projection fixed vertically to the bottom plate and having the highest center. A support plate having an upper end side to be mounted, mounted on the upper end side of the support plate, rotatably provided with the upper end side as a rotation center axis, and provided at one end with an interval in the direction of the rotation center axis. A movable contact piece formed of a substantially quadrilateral metal plate having two movable contacts, and one end having a fixed contact opposed to the two movable contacts on the bottom plate, and the other end attached And two fixed contact pieces that penetrate the bottom plate and protrude outward as terminals, and two slidable pieces in a direction perpendicular to the rotation center axis direction by pressing the upper surface of the movable contact piece. A driving unit having a sliding protrusion, and the driving unit having the movable unit Coil spring means for applying a biasing force to the piece, and the coil spring means accommodated in a spring accommodating hole formed at the lower end, and the driving means is slidable so that the driving means can be protruded and retracted with respect to the movable contact piece by sliding the driving means. An operator having a rotatable columnar portion to hold;
Cover means that is attached to close the opening of the case, and that rotatably holds the operation element by inserting the operation element into an insertion hole formed in the center. The connection between the terminals of the two fixed contact pieces is conducted and opened.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2A shows only a main part in a simplified manner in order to explain the principle configuration of a switch according to the present invention. In the present invention, the two movable contacts 50C ₁ and 50C ₂ are attached to the distal end of the movable contact piece 50 at an interval in the direction of the center axis of rotation of the movable contact piece 50.
2, fixed contacts 70C ₁ and 70C ₂ are movable contacts 50C ₁ and 50C ₂
The fixed contact pieces 70 ₁ and 70 ₂ are arranged so as to face the terminal, and their terminals 7T ₁ and 7T ₂ penetrate the bottom plate 12 and protrude outside. A substantially central lower surface of the movable contact piece 50 is supported by a central protruding portion 6 </ b> P on the upper side of the support plate 60. Therefore,
The lower surface of the movable contact piece 50 contacts the central projecting portion 6P on the upper end side of the support plate 60 at almost one point.

The driving piece 46 attached to the lower end of the plunger 43 mounted on the operation element 40 has two sliding projections 46 ₁ of the same length arranged in the direction of the center axis of rotation of the movable contact piece 50.
Has 46 _2, the two sliding projections 46 _1, 46 ₂ of the lower end, perpendicular to the rotational axis direction of the movable contact piece 50, and, spaced equidistantly on opposite sides from the central projecting portion 6P It is slidable along two parallel lines. Therefore, even though the movable contact piece 50 is supported at one point by the central projection 6P of the support plate 60, the rotation center axis of the movable contact piece 50 is always held parallel to the bottom plate 12.

[0010] In Figure 2A, relative to the sliding protrusion 46 _1, 46 ₂ of the lower end support plate 60, the movable contact piece 50 is pressed at the side opposite to the movable contact 50C _1, 50C _2, the movable contact piece 50, Movable contact
The end opposite to 50C ₁ and 50C ₂ is in a state of being stably held in contact with the bottom plate 12. At this time, the movable contact 50C ₁ ,
The 50C ₂ and the fixed contacts 70C ₁ and 70C ₂ are separated from each other, and the two terminals 7T ₁ and 7T ₂ are non-conductive, that is, the switches are OFF. The lower ends of the sliding protrusions 46 ₁ and 46 ₂ slide to support the support plate 6.
Through both sides of the center projection 6P 0 over the upper end of the support plate 60, with respect to the sliding protrusion 46 _1, 46 ₂ of the lower end support plate 60, moving on the same side as the movable contact 50C _1, 50C ₂ , Movable contact piece 50
The movable contact 50C _1, 50C ₂ rotates clockwise fixed contacts 70C _1, 70C ₂ abuts, is stably maintained in that state. In this state, conduction is established between the _two terminals 7T ₁ and 7T ₂ and the switch is in the ON state.

The switch of the present invention shown in FIG. 2A has an equivalent circuit, as shown in FIG. 2B, in which two switches SW1 and SW2 connected in series are turned on and off simultaneously in conjunction with each other. Therefore, the voltage V applied between the _two terminals 7T ₁ and 7T ₂ is divided into two, and each of the switches SW1 and SW2 has V / 2
Is applied, the switch of the present invention has a higher withstand voltage. In addition, each switch SW1, S
The voltage applied to W2 is V / 2, on, contact 50C ₁ by sparks during off, 50C _2, 70C _1, less consumption of 70C _2. In addition, since the support plate 60 is not used as an electrical lead-out terminal of the movable contact piece 50, the contact state between the support plate 60 and the movable contact piece 50 has no relation to the stability of the switch, and the instability of the switch as in the related art is caused. I will not let you. First Embodiment FIGS. 3 to 8 show a first embodiment of the present invention to which the principle of FIGS. 2A and 2B is applied. In this embodiment, a metal cover 20 (see FIG. 4) having an inverted U-shaped cross section that covers the upper opening of the box-shaped case 10 and the upper halves of both sides is covered. The metal cylindrical rotating body holding portion 30 has a rim portion 33 having a reduced thickness at its lower end. The rim portion 33 is fitted into a hole 24 formed in the center of the upper surface of the cover 20, and the protrusion is formed. It is bent radially outward and swaged to the cover 20.
The rotating body holding portion 30 is threaded on the outer periphery to be attached to a device in which the switch is used, and is also used as a portion to be attached to the device.

The rotating body holding section 30 has a rotating body housing chamber 31 whose inner diameter decreases upward, and the rotating body housing chamber 3.
An opening 32 communicating with 1 and having an inner diameter that increases upward.
Are formed. The lower half of the operation member 40 formed as a toggle lever has a columnar portion 42, and a spring receiving hole 42A extends from the lower end thereof concentrically with the center axis and along the center axis. The lower part of the columnar part 42 is a spherical part 4 whose diameter is expanded.
2B. The spherical portion 42B is rotatably accommodated in the rotating body housing chamber 31 and functions as a rotating shaft. A portion of the operation element 40 protruding outside from the spherical portion 42B through the opening 32 acts as the operation section 41.

A coil spring 45 is housed in the spring housing hole 42A. The lower end of the coil spring 45 is in the spring receiving hole 42.
The upper end of the plunger 43 inserted in A is engaged with the coil spring 45 so that the lower end of the plunger 43 always projects. A driving piece 46 having _two sliding projections 46 ₁ and 462 is attached to the lower end of the plunger 43. The sliding protrusions 46 ₁ and 46 ₂ are arranged in the direction of the rotation center line of the movable contact piece 50, and the upper end side central protrusion 6 of the support plate 60 is provided.
It is slidable on the movable contact piece 50 in a direction perpendicular to the rotation center line along two parallel lines equidistant from each other in the opposite direction from P.

When viewed from above, the box-like case 10 is substantially rectangular as shown in FIG. 5, and as shown in FIGS. 4 and 5, its long side wall has a lower half protruding outward. .
The cover 20 has a substantially rectangular top plate 2 as shown in FIG.
1 and side plate portions 22 extending downward at right angles from the long sides thereof. The side plate 22 is attached to the case 10 so as to cover the upper half of the long side wall of the case 10 as shown in FIG. An opening 24 is formed in the center of the top plate 21 of the cover 20. Tabs 23 extending downward from both ends of each side plate portion 22 are formed.

As shown in FIGS. 3 and 5, a substantially rectangular support plate 60 is vertically fixed substantially at the center of the bottom plate 12 of the case 10. Support plate 60 is FIG. 7A, 7B, plan to Figure 7C, as shown in a front view and 7C-7C cross section, the guide protrusion 61 ₁ projecting upward at its both side ends, 61 ₂ are formed, the guide protrusion 61 _1, 61 upper edges of the support plate 60 between ₂ is formed on the highest projecting at the center 6P. Its height is at both ends from e.g. 0.5~1.0mm about the upper end side, the height of the guide projection 61 _1, 61 ₂ further than this is higher by the thickness of the movable contact piece 50. As a result, the pivot point of the movable contact piece 50 described later is substantially one point. If the shape of the upper end side of the support plate 60 is highest at the center,
It may be an arc or two sides of a triangle. In addition, the rotating contact piece 50
In order to reduce the change in the position of the starting point during the rotation, the cross section may be wedge-shaped so that the thickness of the upper end side of the support plate 60 becomes thinner toward the tip.

[0016] the support plate 60 is extended at right angles respectively from the both sides, the fixing plate portion 62 ₁ which is further extended downward,
62 ₂ is formed. The fixing plate portions 62 ₁ and 62 ₂ are not used as electric terminals, but penetrate the bottom plate 12 and protrude downward as shown in FIG. 3, and fix the support plate 60 by twisting and deforming the protruding portions. Then, the protruding portion is cut and removed. Since the support plate 60 in the electric not contribute to the switch circuit, and an insulating material, although not shown, the base plate fixing plate portions 62 ₁ to 12 to form the slot, 62 ₂ may be press-fit fixing .

The movable contact piece 50 is shown in FIGS.
It is formed of a substantially rectangular metal plate as shown in the front view.
Movable contact 50C in both corner areas on one short side₁, 50C_TwoTake
It is attached. Movable contact 50C from the center of its short side₁,
50C_TwoA notch 54 passing through the gap is formed. Figure 3 and
As shown in FIGS.
Notch so that the partition wall 11PW extended from
50C which penetrates into only 54₁, 50C_TwoAmong
Increase the creepage distance and make the terminal
7T₁, 7T_TwoEven if abnormally high voltage is applied during
And make the switch withstand voltage higher. Movable contact 5
0 at the center of both long sides. ₁, 53_TwoFormed
The two guide protrusions 61 of the support plate 60 are
₁, 61_TwoThe inner rim engages the guide projection 61₁, 61_Twowhile
The movable contact piece 50 is rotatably held at. Movable contact
50 movable contacts 50C₁, 50C_TwoIs the bottom plate 1
The movable contact piece is bent to two sides to form a stopper portion 52.
The rotation range of 50 is limited.

[0018] Figure 3 and as shown in 4, the bottom plate 12 movable contactor 50C _1, fixed to a position facing the them under 50C ₂ contacts 70C _1, the fixed plate 72 ₁ 70C ₂ is attached to, 72 ₂
The inverted L-shaped fixed contact piece 70 _1, 70 ₂ are provided, each having its legs the bottom plate 12 through a pin 7T _1, 7T _2, the penetrating bottom end is bent twisted 45 degrees, omission It is stopped, holding the stationary contact piece 70 _1, 70 _2. To assemble the switch of the present invention, first, the coil spring 45 is inserted into the spring accommodating hole 42A of the operating element 40, and then the plunger 43 with the driving piece 46 fixed to the tip is inserted. The upper surface of the side wall 11 of the case 10 is covered with an insulating sheet 18 having a hole 18A at the center, and the driving piece 46 mounted on the operation element 40 is inserted into the case 10 through the hole 18A to slide the case. projections 46 _1, 46 ₂ are held in contact with the upper surface of the movable contact piece 50. The operation element 40 is passed from the upper end thereof to the rotating body holding section 30, and the cover 20 is covered with the insulating sheet 18 sandwiched between the upper end of the side wall 11. Cover 20
The tabs 23 at the lower four corners of the side wall portions 22 are bent so as to engage with the step portions 13 formed on the side wall 11 of the case 10, and the cover 20 is fixed. The insulating sheet 18 is for reducing the intrusion of foreign matter into the case 10, but may be omitted.

In the first embodiment described above, when the toggle lever 41 is turned over, the lower ends of the _two sliding projections 46 ₁ and 462 of the driving piece 46 attached to the plunger 43 simultaneously press the upper surface of the movable contact piece 50. Since the movable contact piece 50 slides over the support plate 60 and the movable contact piece 50 is inverted, the two movable contact pieces 50
Simultaneous contact (ON) and simultaneous separation (OFF) between C ₁ , 50C ₂ and the two fixed contacts 70C ₁ , 70C ₂ can be realized. Second Embodiment FIGS. 9, 10 and 11 show a vertical sectional view parallel to a long side, a vertical sectional view parallel to a short side and a plan view according to a second embodiment of the present invention. The switch of the second embodiment also includes two fixed contact pieces 70 ₁ and 70 ₂ and a support plate 60 disposed on the bottom plate 12 of the insulator case 10, and a movable contact rotatably supported on the support plate 60. a piece 50, the driving member 4 having a movable contact piece 50 two sliding projections 46 ₁ for driving a 46 ₂
6 are provided, and they operate according to the same principle as that described in FIGS. 2A and 2B, as in the first embodiment. The second embodiment differs from the first embodiment mainly in the following points.

(1) The cover 20 for the case 10 and the rotating body holder 30 are integrally formed of the same material. (2) The rotating shaft 47 is provided on the operation element 40, and a bearing recess 31 GB for receiving the rotating shaft 47 is formed in the rotating body housing chamber 31. (3) The plunger has a plate shape and is also used as the driving piece 46. (4) A rubber waterproof cap 80 is provided so that dust and water do not enter from between the rotating body holding unit 30 and the operation element 40.

The outer walls of the upper half of the four side walls of the case 10 having a substantially rectangular horizontal section are located inside the outer walls of the lower half, and a step 13 is formed at the boundary. At the center of the inner wall surface of the long side wall of the case 10, a column 11C protruding inside the case extends vertically and is integrally formed. The column 11C protrudes and extends above the upper end of the side wall 11. I have. A positioning engagement pin 11PN is integrally formed at the center of the upper end of the short side wall of the case 10 so as to extend upward. A partition 11PW extends integrally from the center of the inner surface of one short side wall toward the center of the case in parallel with the long side wall. Two fixed contact pieces 70 ₁ and 70 ₂ are arranged in two regions separated by the partition 11PW on the upper surface of the bottom plate 12, and the terminal portions of the fixed contact pieces 70 ₁ and 70 ₂ penetrate the bottom plate 12 and protrude outside. , two fixed contact terminals 7T _1, there is a 7T _2. An external partition 15 extending vertically downward from the bottom surface of the bottom plate 12 is formed integrally so as to separate the _two terminals 7T ₁ and 7T ₂ at the center.

The driving piece 46 also serving as a plunger is formed in a substantially rectangular plate shape, and an engagement groove 46G for engaging with one end of the coil spring 45 is formed at the center of one side as shown by a broken line in FIG. from its opposite sides spaced ₁ two sliding projections 46 of the sides 46 ₂ are integrally formed. FIG.
A, 12B, and 12C are side views of a partial cross section of the operation element 40,
As shown in a partial sectional view and a bottom view at right angles thereto, a spring receiving hole 42 concentric with the center line from the center of the lower end of the operation element 40 is shown.
A is formed, and a sliding groove 44S is formed at the lower end of the operation element 40 along the center line of the operation element 40, and its depth is shallower than the spring accommodating hole 42A. At the lower end of the coil spring 45, the coupling groove 46G of the plate-shaped driving piece 46 (FIG. 10)
And the coil spring 45 is connected to the spring receiving hole 42A.
And a plate-shaped driving piece 46 is mounted in the sliding groove 44S.

In this embodiment, the support plate 60 is L-shaped as shown in FIG. 13, and a fixing hole 6B is formed in the center of a fixing plate 62 which is a leg thereof. Protrusion 6P at the center of the upper end side of the support plate 60 is formed, that _{the first} guide protrusions 61 protruding upward from both side ends, 61 ₂ are formed is the same as the first embodiment. As shown in FIGS.
The support plate 60 is fixed by press-fitting a projection 12P integrally formed on the bottom plate 12 into a fixing hole 6B formed in the fixing plate portion 62 of the L-shaped support plate 60. 14A, 14B, and 14C, a cylindrical rotating body holding portion 30 is integrally formed from the center of the upper surface as shown in the plan view, the partial cross-sectional side view, and the bottom view. The rotating body holding chamber 30 has a rotating body housing chamber 31 formed therein. A guide recess 31 </ b> G that guides the rotating shaft 47 (see FIGS. 9 and 10) of the operation element 40 is formed on the inner surface of the side wall of the rotating body housing chamber 31. The upper side of the guide recess 31G is a narrow bearing recess 31GB.

Also in the second embodiment, the coil spring 4
5 and driving piece 46 is attached to the operating element 40, the sliding protrusion ₄₆₁ of the driving piece 46, 46 ₂ presses the upper surface of the movable section 50, the rotary shaft 47 of the operating element 40 on the top surface of the strut 11C The cover 20 and the rotating body holder 3 are held in a state where they are mounted.
0 is inserted from above the operation element 40. At this time, the rotating shaft 47 and the support 11C are guided by the guide recess 31G and enter the rotating body housing chamber 31, and the rotating shaft 47 further enters the bearing recess 31GB, and is positioned and supported on the top surface of the support 11C. .
At the same time, the upper part of the side wall 11 of the case 10
0 is inserted into the frame-shaped groove 20G formed on the lower surface of the cover 10 and the positioning engagement pin 11PN of the case 10 is
B is inserted. In this state, cover the pin 11P with the cover 20.
And pin holes 21A, 11A formed in the side wall of case 10.
Press in and fix.

A ring groove 3 is formed on the outer periphery of the upper end of the
0G is formed, and a ring groove 40G is also formed on the outer peripheral surface of the operation element 40 protruding from the rotating body holding section 30. The cylindrical rubber cap 80 has thick ring portions 80A and 80B at both ends.
0, and the thick ring portion 80A at one end
And the thick ring portion 80B at the other end is engaged with the groove 40G of the operator 40. Thereby, the operation unit 4
It is possible to prevent dust and water from entering from a gap between the rotation member holding portion 30 and the rotation member 0.

As described above, in the second embodiment, the cover 20
And the rotating body holding part 30 are integrated, and the plunger and the driving piece 46 are also used. Therefore, even if the waterproof cap 80 is used, the number of parts is smaller than that of the first embodiment, and the dustproof and waterproof properties are excellent. Third Embodiment FIGS. 15 and 16 show a vertical cross section parallel to the long side and a vertical cross section perpendicular to the long side of a switch according to a third embodiment of the present invention. This embodiment also applies the principle of the present invention shown in FIGS. 2A and 2B. Fixed contact pieces 70 ₁ , 7 arranged on the box-shaped case 10 and its bottom plate 12 in the third embodiment.
The configurations of O ₂ , the support plate 60 and the movable contact piece 50 placed on the support plate 60 are the same as those of the second embodiment shown in FIGS. However, the support 11C does not protrude above the side wall 11.

The main differences are that the operation part 41 is of a tumbler type, and that the rotation shaft 47 of the operation element 40 is formed on the side wall of the rotation body holding part 30 which also serves as a switch mounting part. The point is that it is rotatably held by the hole 31B, and the point that the dustproof and waterproof structure is provided in the rotatable body housing chamber 31.
In this embodiment, a leaf spring 35 bent in a low mountain shape is provided on both opposite side walls of the mounting portion 30 to the device to which the switch is mounted so as to protrude outward, and is formed in the housing of the mounting device. The switch mounting portion 30 can be mounted in a mounting hole (not shown) by snap-in.

FIGS. 17A, 17B, 17C
As shown in FIG. 5, a rectangular communication hole 24 is formed in the center of the top plate portion 21, and the periphery thereof forms a rim 24A protruding upward. Further, a leg wall 20W that extends downward from the lower end of the opposing short side and that covers the short side wall of the case 10 is integrally formed. On the lower surface of the cover 20, a case 10
A frame-shaped fitting groove 20G into which the upper end of the side wall is inserted is formed. A rotating body holding portion 30 is integrally formed on the upper surface of the quadrangular top plate portion 21 by side walls along each side, and a rotating body housing chamber 31 is formed inside the rotating body holding portion 30. Bearing holes 31 </ b> B are formed in opposing long side walls of the rotating body holder 30, and four upper ends of the rotating body holder 30 form flanges 34 protruding outward.

The tumbler-type operation unit 41 (hereinafter, also referred to as tumbler 41) is formed in a rectangular box-like shape in this embodiment as shown in a partial cross section in FIG. Rotation shafts 47 are integrally formed on both side surfaces. The rotating shaft 47 has a tapered surface 47T having a reduced thickness at the lower end thereof. When the operating element 40 is inserted into the rotating body housing chamber 31, the rotating shaft 47 is opposed to the rotating shaft 47 in which the bearing hole 31B is formed. The two side walls are pushed outwardly to elastically widen the interval, and return to the original state when the rotating shaft 47 is fitted into the bearing hole 31B, so that the operation element 40 is rotatably held between the side walls.

A cylindrical portion 42 extends and protrudes from the center of the inner ceiling surface of the box-shaped operation portion 41, as in the second embodiment.
A spring accommodating hole 42A for accommodating a coil spring is formed concentrically with the center axis of the cylinder from the distal end surface of the cylindrical portion 42, and a sliding groove 44S diametrically crossing the cylindrical portion 42 is formed on the distal end surface at the central axis. It is cut along. The lower end of the rubber waterproof cap 80 has the communication hole 2 of the cover 20.
4 is a rectangular thick substrate portion 80A having a rectangular window 80W formed thereon, and the upper end is formed as a ring portion 80B. As shown in FIGS. 18A and 18B by a vertical section parallel to the long side and a vertical section parallel to the short side,
Thus, the long side is gradually reduced so that the cross section becomes circular. The diameter of the ring portion 80B at the upper end is set so that the inner periphery thereof elastically closely contacts the outer peripheral surface of the columnar portion 42. A lower edge is formed with a frame-shaped ridge 80R protruding downward. The frame-shaped lip 80R surrounds the rim 24A (see FIG. 17A) of the rectangular communication hole 24 of the cover 20 and is in close contact with the upper surface of the cover 20. FIG.
(See Ref.) To prevent water and dust from entering.

In the tumbler 41, a waterproof cap 80 is previously mounted on the cylindrical portion 42, and a coil spring 45 having a driving piece 46 connected to the lower end thereof is mounted in a spring receiving hole 42A.
Is inserted into the case 10 through the rotating body housing chamber 31 and the opening 24 together with the driving piece 46. At this time, the sliding protrusion 46
_1, 46 ₂ is pressed against the upper surface of the movable contact piece 50. Operator 4
0 is press-fitted into the rotating body housing chamber 31 from above and the switch is assembled by inserting the rotating shaft 47 until it fits into the bearing hole. Fourth Embodiment FIGS. 19, 20 and 21 show a fourth embodiment of the switch according to the present invention.
A vertical cross section parallel to the long side, a vertical cross section parallel to the short side, the case 10 with the cover removed, and the inside thereof are shown by a plane. This embodiment is, in the embodiment of FIGS. 9, 10 and 11, in which the sliding protrusion 46 ₁ integral with the driving piece 46, 46 ₂ was constructed by isolation as described below.

In this embodiment, as shown in FIGS. 22A and 22B, two spring receiving holes 42A are formed at the lower end of the operation element 40 in parallel with the center axis of the operation element 40 in the axial direction of the rotating shaft 47. Have been. The two cylindrical sliding projections 46 ₁ , 4 with their lower ends closed, which are mounted in the spring receiving holes 42A.
6 ₂ are provided, these cylindrical sliding protrusion 46 _1, 46 ₂
Are respectively mounted with coil springs 45. Cylindrical sliding projections 46 ₁ , 4 on which the coil springs 45 are mounted.
6 ₂ is slidably mounted in the spring receiving hole 42A. The coil spring 45 protrudes upward from the cylindrical sliding protrusions 46 ₁ and 46 ₂ and abuts on the ceiling of the spring receiving hole 42A.
6 _1, urges the 46 ₂ downwardly, to press the lower end of the sliding protrusions 46 _1, 46 ₂ on the upper surface of the movable section 50.

The other structure is almost the same as that of FIG. According to this configuration, ₁ two sliding projections 46, 46 ₂ presses slides an upper surface of the movable section 50 at substantially the same pressure. The configuration of the driving piece 46 may be applied to other embodiments. Fifth Embodiment FIGS. 23 and 24 show the embodiment of FIGS.
This is an embodiment in which an operating element 40 having a driving piece 46 at 0 is applied. In this embodiment, the switch mounting portion 30 and the rotating body holding portion 24B are separately formed on the cover 20. A rotating shaft 47 protruding on both sides at right angles to the center line of the operating element 40 is formed at an intermediate portion of the cylindrical portion 42 of the operating element 40. The top plate 21 of the cover 20 has an upper surface as shown in FIG.
A rim 24A around the insertion hole 24 indicated by 16 is extended upward to form a cylindrical rotating body holding portion 24B, and the cylindrical rotating body holding portion 24B faces each other parallel to the long side of the case 10. The guide recess 31 described with reference to FIG. 14B for receiving the rotation shaft 47 on the two inner walls and guiding the support 11C.
A guide groove 24G similar to G is formed. Rotating shaft 47
Is rotatably supported by the upper end of the support 11C at the uppermost part of the guide groove 24G.

A mounting pin 40P is integrally formed at the center of the ceiling of the tumbler-type operation unit 41, and circular projections 48 are formed on both sides of the tumbler-type operation unit 41 concentrically with the rotation shaft 47. I have. The tapered surface 48T is formed so that the thickness of the circular projection 48 on the lower side is substantially zero. The cover 20 has a mounting portion 30 formed by extending the outer peripheral wall of the cover 20 in FIG. 19 upward, and a tumbler-type operation portion 41 is mounted in a rotating body housing chamber 31 inside the mounting portion 30. At this time, the mounting pin 40P is
By pressing down the tumbler 41 so as to fit into the mounting hole 42B formed at the upper end of the tumbler 41, the tapered surface 48T of the circular engagement projection 48 of the tumbler 41 elastically pushes the gap between the opposed side walls of the mounting portion 30 to expand. 41 enters, and the engaging projection 48 is rotatably fitted into the engaging hole 30H of the mounting portion 30. This prevents the tumbler 41 from falling out of the rotating body housing chamber 31.

The mounting of the tumbler 41, first, the sliding protrusion ₄₆₁ of the operating element 40, 46 ₂ presses the upper surface of the movable contact piece 50, the rotary shaft 4 of the operating element 40 on the top surface of the strut 11C
7 is mounted, and in this state, the rotating shaft 47 and the support 11 are inserted into guide grooves 24G formed on the inner wall surface of the cylindrical rotating body holding portion 24B.
Guide C and cover 20 from above case 10.
Next, the outer periphery of the upper end of the cylindrical portion 42 and the outer periphery of the upper end of the cylindrical rotating body holding portion 24B are connected and covered with a waterproof cap 80, and the mounting pin 40P of the tumbler 41 is inserted into the mounting hole 42B to move the tumbler 41 to the rotating body housing portion. 31, and the engagement protrusion 48 is snapped into the engagement hole 30H. Sixth Embodiment The embodiment of FIG. 25 is obtained by forming two circuit switches in the embodiment of FIG. FIG. 25 is a vertical section parallel to the long side, and FIG.
0 shows a plan view from above. As shown in FIGS. 25 and 26, movable contacts 50C ₃ and 50C ₄ are also provided at both corners opposite to the movable contacts 50C ₁ and 50C ₂ with respect to the support plate 60, and the fixed contacts 70C ₃ opposed thereto are provided. , 70C ₄ fixed fixing piece 7
0 _3, 70 ₄ are attached to the bottom plate 12.

[0036] In the stationary strips 70 ₁ to 70 ₃ in this embodiment is formed integral structure which is connected by a connecting portion 71, also the terminal of the stationary contact piece 70 ₃ is not formed, electrically pin 7T ₁ Is a common terminal. Thus, in this embodiment, form one of the switch circuits between terminals 7T ₁ and 7T _2,
Form another switch circuit between terminals 7T ₃ and 7T _4, pin 7T ₁ is used as a common terminal of the two switching circuits. Of course, without providing the connecting portion 71, the terminal 7T ₃ was extended to the fixed contact piece 70 ₃ (not shown) may be provided electrically separated from each other two switching circuits.

Furthermore in this embodiment, 55 cut from the edge of the movable sections 50 in the middle of the movable contact 50C ₃ and 50C ₄ as shown in FIG. 26 and is formed, on the notch 55 does not contact with it septum 12PW is extended entering short edge side wall of the case, and to increase the creepage distance between the fixed contacts 70C ₃ and 70C ₄ as. Seventh Embodiment A seventh embodiment of the present invention shown in FIG. 27 is an embodiment in which two switch circuits are formed in the same manner as the embodiment of FIG. 23 as in FIG. 25, and a description thereof will be omitted. Thus, in any of the above-described embodiments, two switch circuits may be formed in the same manner as shown in FIG.

In the above-described first, second and third embodiments, the movable contact piece 50 has a sliding surface having sliding protrusions 46 ₁ and 46 _2.
9 is slightly bent as shown in FIG. 3 so as to be convex downward in the sliding direction of FIG.
By using an arcuate surface as shown in 3, 25 and 27, the rotation range of the plunger 43 (or the driving piece 46) can be made larger than in the case of the flat movable contact piece, and accordingly, the movable contact 50C ₁ , 50C ₂ and can increase the divergence distance at the time off between or between 50C _3, 50C ₄ and 70C _3, 70C ₄ of the fixed contact 70C _1, 70C _2, it can increase the abnormal discharge starting voltage in the off state. Therefore, a switch with a higher withstand voltage can be realized.

[0039]

As described above, according to the present invention, the two movable contacts 50C ₁ , 50C received on the movable contact piece 50 are also provided.
C ₂ and the respective fixed contacts of the _two fixed pieces 70 ₁ , 70 _2
Two series switches are configured between 70C ₁ and 70C ₂ , and the upper surface of the movable contact piece 50 supported at substantially one point of the support plate 60 is slid while being pressed by the _two drive projections 46 ₁ and 462. Therefore, the two switches connected in series can be simultaneously turned on / off. Therefore,
The withstand voltage of the entire switch can be doubled compared to the conventional switch. If the moving distance per unit time when the movable contacts 50C1 and 50C2 are turned off, that is, the speed is dcm / sec, the total moving distance of the two movable contacts per unit time is 2dcm / sec. Therefore,
The time required for the discharge arc to be extinguished when the switch is turned off is less than half, and as a result, the contacts 50C ₁ , 50C ₂ , 70C ₁ , 70
Wear and tear of C ₂ can be reduced.

[Brief description of the drawings]

FIG. 1A is a vertical sectional view of a conventional switch, and FIG. 1B is a vertical sectional view perpendicular to the vertical section in A.

FIG. 2A is a perspective view illustrating the principle configuration of a switch according to the present invention, and FIG. 2B is a diagram illustrating an equivalent circuit of the switch according to the present invention.

FIG. 3 is a vertical sectional view parallel to a long side of the switch according to the first embodiment of the present invention;

FIG. 4 is a vertical partial cross-sectional view parallel to a short side of the first embodiment.

FIG. 5 is a plan view of the first embodiment with the cover 20 removed.

FIG. 6 is a perspective view of a cover 20;

7A is a plan view of the support plate 60, FIG. 7B is a front view of the support plate 60, and FIG. 7C is a cross-sectional view of the support plate 60 taken along line 7C-7C.

8A is a plan view of the movable contact piece 50, and FIG.
Side view.

FIG. 9 is a vertical sectional view parallel to a long side of a switch according to a second embodiment of the present invention;

FIG. 10 is a vertical sectional view parallel to a short side of the second embodiment.

FIG. 11 is a plan view of the second embodiment except for a cover 20;

12A is a front view of the operation element 40, B is a side view of the operation element 40, and C is a bottom view of the operation element 40. FIG.

FIG. 13 is a perspective view of a support plate 60.

14A is a plan view of the cover 20, FIG. 14B is a partial sectional front view of the cover 20, and FIG.

FIG. 15 is a vertical sectional view parallel to a long side of a third embodiment of the switch according to the present invention;

FIG. 16 is a vertical sectional view parallel to a short side of the third embodiment.

17A is a plan view of the cover 20, FIG. 17B is a partial sectional side view of the cover 20, and FIG.

18A is a vertical sectional view parallel to the long side of the waterproof cap 80, and FIG. 18B is a vertical sectional view parallel to the short side of the waterproof cap 80.

FIG. 19 is a vertical sectional view parallel to a long side of a switch according to a fourth embodiment of the present invention;

FIG. 20 is a vertical sectional view parallel to the short side of the fourth embodiment.

FIG. 21 is a plan view of the switch of the fourth embodiment with the cover removed.

FIG. 22A is a partial sectional view of an operator used in the fourth embodiment, and FIG. 22B is a bottom view of the operator of A.

FIG. 23 is a vertical sectional view parallel to a long side of a fifth embodiment of the present invention.

FIG. 24 is a vertical sectional view parallel to a short side of the fifth embodiment.

FIG. 25 is a vertical sectional view parallel to a long side of a sixth embodiment according to the present invention.

FIG. 26 is a plan view of the switch of the sixth embodiment with the cover removed.

FIG. 27 is a vertical sectional view parallel to a long side of a switch according to a seventh embodiment of the present invention;

Claims (17)

[Claims] 1. A box-shaped case having a bottom plate made of an insulator and having an opening on an upper surface, a support plate fixed vertically to the bottom plate and having an upper end side forming a central projection having the highest center. The movable plate has two movable contacts that are mounted on the upper end side of the support plate and are rotatably provided around the upper end side as a rotation center axis, and are provided at one end with an interval in the direction of the rotation center axis. A movable contact piece formed of a quadrilateral metal plate, and one end having a fixed contact opposed to the two movable contacts on the bottom plate, and the other end protruding outside through the bottom plate. A driving means having two fixed protrusions, each of which is a terminal, and two sliding protrusions which press the upper surface of the movable contact and can slide in a direction perpendicular to the direction of the rotation center axis; Coil bar for applying a biasing force to the movable contact piece to the driving means Means for accommodating the coil spring means in a spring accommodating hole formed at a lower end thereof, and rotatably holding the driving means so as to protrude and retreat from the movable contact piece by sliding the driving means. An operating element having a portion, and cover means attached so as to close the opening of the case, and rotatably holding the operating element by inserting the operating element into an insertion hole formed at the center, and covering the operating element. A switch for turning on and off the terminals of the two fixed contact pieces by turning. 2. The switch according to claim 1, wherein the driving means is attached to a rod-shaped plunger having one end inserted so as to protrude and retreat into a spring accommodating hole of the operation element, and is attached to the other end of the plunger. A driving piece having two sliding protrusions. 3. A switch according to claim 1, wherein a sliding groove is formed at a lower end of said operating element in a direction diametrically across said spring receiving hole, and said driving means is substantially rectangular plate-shaped. A switch wherein an upper end portion is slidably inserted into the sliding groove, engages with the coil spring, and the sliding protrusion is formed at a lower end side with an interval. 4. The switch according to claim 1, wherein two of said spring receiving holes are formed at a lower end of said columnar portion in parallel with a center line of said columnar portion and side by side in said rotation center direction. The driving means is slidably mounted in the two spring receiving holes and includes two cylindrical sliding projections having lower ends closed, and one end of the coil spring means is inserted into each of the two cylindrical sliding projections. The other end comprises two coil springs projecting upward from the cylindrical sliding projections and abutting against the ceilings of the two spring receiving holes, thereby forming the two coil springs.
A switch wherein the lower ends of two sliding projections are pressed against the movable contact piece. 5. The switch according to claim 1, wherein said movable contact piece further has two movable contacts at the other end thereof spaced apart in the direction of said rotation center, and said movable contact piece is provided on said bottom plate. There are further provided two fixed contacts having one end having two more fixed contacts opposed to the two movable contacts, and the other ends of the further two fixed contacts project outside through the bottom plate. , Further comprising two terminals. 6. The switch according to claim 1, wherein said movable contact piece further has two movable contacts at the other end thereof spaced apart in the direction of said rotation center, and said movable contact piece is provided on said bottom plate. Two further fixed contacts having two more fixed contacts facing the one movable contact are provided, one of the two further fixed contacts being integrally connected with one of the two fixed contacts, A switch, wherein the other of the two fixed contact pieces penetrates through the bottom plate and protrudes outward to form one more terminal. 7. A switch according to claim 1, wherein said support plate projects from both ends of an upper end side of said switch so as to project higher than said central projection. A projection is integrally formed, and the movable contact piece has an engagement recess formed at the center of both sides thereof.
A switch, wherein the switch is engaged with and held by the two guide projections. 8. The switch according to claim 1, wherein said cover means includes a top plate having said insertion hole through which said operation element is formed at a center thereof. ,
A cover having a substantially U-shaped cross section having a side plate portion extending downward from both side pieces of the top plate portion and covering at least the upper portion of the outer side surface of the opposing side wall of the case, and mounted on the cover, A switch, comprising: a rotating body holding portion rotatably housing a rotation center portion of the operating member, wherein the operating member has a lever portion protruding upward from the rotating body holding portion. 9. The switch according to claim 1, wherein a rotation axis is formed on a rotation center line of said operation element, and said cover means is provided with said cover means. A top plate portion that covers over the opening of the case, a side plate portion that covers at least the upper part of the opposing side wall of the case from a side edge of the top plate portion, and a bearing recess that receives the rotation shaft on the top plate portion; A switch comprising: a rotating body holding portion having a rotating body accommodating chamber formed on an inner wall. 10. The switch according to claim 1, wherein the movable contact piece is provided between the center of one end of the movable contact piece and the two movable contacts. The switch is characterized in that a notch is formed through the case, and a partition is provided in the case to extend into the notch from the inner wall surface. 11. A switch according to claim 8, wherein said first ring portion elastically adheres to an outer periphery of an upper end portion of said rotating body holding portion, and said first ring portion closely contacts an outer periphery of said lever portion outside said rotating body holding portion. A switch provided with a rubber waterproof cap including a second ring portion and a tubular portion connecting between the first and second ring portions. 12. The switch according to any one of claims 1, 2, 3, 4, 5, and 6, wherein the operation element extends downward from a box-shaped tumbler and a center of a ceiling in the tumbler. A rotating shaft protruding from both side walls of the tumbler, wherein the cover means has an insertion hole through which the columnar portion is rotatably passed, and closes an opening of the case. A switch, comprising: a cover; and a rotating body housing portion provided on the cover and rotatably housing the tumbler. 13. A switch according to claim 12, wherein a rim protruding upward surrounding said insertion hole is integrally formed on said cover, said ring portion being in close contact with the outer peripheral surface of said cylindrical portion, and It includes a quadrilateral substrate portion surrounding the rim and in contact with the upper surface of the cover, and a rubber waterproof cap including a cylindrical sleeve portion connecting the substrate portion and the ring portion. Switch to do. 14. The switch according to any one of claims 1, 2, 3, 4, 5, and 6, wherein the operating element extends downward from a box-shaped tumbler that is laid down and a ceiling inside the tumbler. A mounting pin, a circular engagement projection formed concentrically with the rotation shaft so as to protrude outward on both side surfaces of the tumbler, and a mounting hole in which the mounting pin of the tumbler is fitted is formed at the top, An intermediate portion having a rotating shaft projecting to both sides perpendicular to the center line of the columnar portion, the columnar portion having a lower end provided with the driving means, and the cover means having an opening of the case. A top plate in which the insertion hole through which the columnar portion is inserted is formed at the center; and a turn extending upward from the periphery of the insertion hole of the top plate in a cylindrical shape, and rotatably holding the columnar portion. Moving body holding part, from the outer periphery of the top plate A side wall which is extended to the inside, and which accommodates the tumbler inside, and has an engagement hole formed to engage with the engagement projection of the tumbler. 15. The switch according to claim 1, wherein the case has a column protruding upward from a center of each of the opposite side walls. The rotating shaft and a guide groove for guiding the support having the rotating shaft mounted on the top and for rotatably holding the rotating shaft are formed on both opposing inner walls of the rotating body holding portion. A switch, characterized in that: 16. The switch according to claim 15, wherein said engaging projection has a tapered surface with a lower end side becoming thinner, and is engaged with said engaging hole. 17. The switch according to claim 1, wherein the sliding surface of the movable contact piece has a downward convex in the sliding direction of the sliding projection. A switch characterized by having a curved surface.