JP3195623B2 - 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 switch having an operation handle portion of a piano handle type.

[0002]

2. Description of the Related Art First, the structure of a conventional piano handle switch will be described. The push button switch 5 shown in FIGS. 5 to 8 has a body formed of a synthetic resin body 5a and a synthetic resin cover 5b, and is provided on a body locking leg 10 which hangs down from a pair of opposing side surfaces of the cover 5b. The provided body engaging hole 10a is engaged with the engaging projection 9 of the body 5a by being engaged therewith.

The cover 5b further has locking claws 11a, 11b respectively corresponding to a pair of locking holes 8 formed in the longitudinal sides of both side pieces 2b, 2b of the mounting frame 2 shown in FIG. Are integrally protruded, and a cover 5 is provided on the back of one of the locking claws 11b.
A space 12 for obtaining a bending allowance formed of a hole vertically penetrating the outer wall of b is formed so that the locking claw 11b can be elastically bent inward.

On both sides of the body 5a, connection terminal housings 13 and 14 are formed. One connection terminal housing 13 houses a quick connection terminal comprising a common terminal plate 15, a lock spring 16 and a release button 17. The other connection terminal housing 14 has a terminal plate 18, a locking spring 19, and a second connection terminal, which constitute a first connection terminal.
And a release button 2 common to the first and second connection terminal portions.
2 are stored.

An opening / closing body 24 is arranged in contact with and connected to a support plate 15a extending from an end of the common terminal plate 15. An extension piece 18a is provided on the terminal plate 18,
The extending piece 18a is Yes extending into the central housing portion 23 rides over the partition wall 14a, is close to the partition wall 14a side further is provided with a fixed contact 25a to the extending piece 18a.

The terminal plate 20 extends into the central storage portion 23 along the inner wall of the body 5a, and its tip is bent along the partition wall of the connection terminal storage portion 13, and the terminal piece 20a is attached to the tip of the bent piece 20a. A fixed contact 25b corresponding to the fixed contact 25a is provided. The opening / closing body 24 is formed of a conductive plate. The opening / closing body 24 is accommodated in the central storage portion 23. It is rotatable around the lower part of the V-shaped recess 27 in a state of being in contact with the support plate 15a.

The movable contacts 29 provided on both upper surfaces of the opening / closing body 24 are fixed to the fixed contacts 25a, 25b in accordance with the rotation.
Contact with and separate from the common connection terminal and the first or second
To turn on and off between the connection terminals. The reversing mechanism for reversing the opening and closing member 24 is a reversing mechanism including a coil spring 30, a reversing handle 31, a push button handle 32 and a slide cam 33 shown in FIG.

The coil spring 30 is inserted into a cylindrical portion 31a having a lower portion engaged with a spring seat 24a provided on an upper edge of the horizontal piece of the opening / closing body 24 and an upper portion integrally projecting from a lower portion of the reversing handle 31. Then, the opening / closing body 24 is driven to be reversed in accordance with the movement of the reversing handle 31 in both side directions. The reversing handle 31 is inserted into the recess 51 from below into a hole 52 opened at the bottom of the recess 51 of the cover 5b,
Inverted triangular shafts 31c provided on both sides of the lower tubular portion 31a of the reversing handle 31 are rotatably supported on bearings 50 on the inner wall of the cover 5b, and are provided on both sides of the upper rectangular parallelepiped portion 31b of the reversing handle 31. Engagement projections 34, 34 which engage with the slide cam 33 are provided on the upper portion.

The push button handle 32 is housed in the recess 51 so as to be able to move up and down by engaging the locking projections 36 and 36 in up and down locking grooves 35 formed on the inner wall surfaces on both sides of the recess 51 of the cover 5b. 2 which is expanded downward from the flat piece 37b.
A return spring 37 formed by integrally extending two return spring pieces 37a, 37a downward, and a hole 3 formed in a flat piece 37b.
By inserting a projection (not shown) projecting from the lower surface of the push button handle 32 into the lower surface of the push button handle 32, the return spring pieces 37a, 37a of the return spring 37 are attached.
The front end is constantly urged upward by elastically contacting the bottom surface of the concave portion 51.

As shown in FIG. 8, the slide cam 33 is made of a thermoplastic resin having a high elasticity such as polyacetal, and is formed in a substantially rectangular shape. Engaging cam body 3 corresponding to
And a pair of spring pieces 33a, 33a integrally protruding in a C-shape at the center of another side portion. The lower surface of the push button handle 32 is provided between the tips of the spring pieces 33a, 33a. The slide cam 33 is slidably mounted on the lower surface of the push button handle 32 by inserting the formed projection 32A (FIG. 10A), and the elasticity of the spring pieces 33a, 33a causes the return force in the anti-sliding direction. Is to give.

The push button switch 5 having the above-described structure is the same as that shown in FIG.
Cover 5b from below into the window hole 6 of the metal mounting frame 2 shown in FIG.
When the lower end of one side piece 2b of the mounting frame 2 is in contact with the upper surface of the periphery of the cover 5b and the contact is rotated with the contact point as a fulcrum, the locking claw 11a on the fulcrum side is The lower end of the vertical side of the other side piece 2b engages with the locking hole 8, and the locking claw 11b is pressed inward by the bending allowance of the space 12 and the elastic force of the material of the cover 5b to thereby lock the locking claw 11b. And engage the locking claw 11b into the locking hole 8. Locking claw 11
The push button switch 5 locked and fixed by engaging a and 11b with the locking holes 8 and 8, respectively, causes the push button handle 32 to protrude from the window hole 6 of the mounting frame 2.

The push button switch 5 mounted on the mounting frame 2 is provided with a piano handle 43. As shown in FIG. 8, the piano handle 43 rotatably locks a fulcrum rib 43a provided on one side edge in a concave portion 54 on one side of the cover 5a, and is formed on the other side edge of the piano handle 43. Of the locking foot 43b to the locking space 4 on the other side of the cover 5a.
7 is attached so as to be vertically movable.

By pressing the other side of the piano handle 43, the piano handle 43 is pivotally movable about the fulcrum rib 43a. By pushing and rotating the piano handle 43, the push button handle 32 is pushed. It can be driven. Next, the operation of the piano handle switch will be described with reference to FIGS.

First, from the state shown in FIG.
When the button is pressed down, as shown in FIGS. 10 to 12, the push button handle 32 is pushed down against the return spring piece 37a, and the push down of the push button handle 32 causes the slide cam 33 to move down to one side of the slide cam 33 (FIG. 11B, the upper side of the reversing handle 31 (FIG. 11) in which the vicinity of the base of the inner inclined surface of the engaging cam body 38 at the end on the left side is inclined.
When the push button handle 32 is further pressed while hitting the engaging projection 34 (left side in (b)), the engaging projection 34 is pushed down along the inner inclined surface of the engaging cam body 38, and the reversing handle 31 rotates in reverse.

In this case, as the reversing handle 31 is inverted by pushing down the push button handle 32, the engaging projection 34
1 and counterclockwise as shown in FIG. 12 (b). With this rotation, the engaging cam body 38 is opposed to the spring piece 33a by the engaging projection 34 as shown in FIG. 12 (b). Even if the reversing handle 32 is rotated to a position beyond the horizontal in the course of reversing the reversing handle 32 and the other engaging projection 34 is raised, the slide cam 33 slides to the left. (Right side in FIG. 13B)
Is located on the left side of the right engaging projection 34 so as not to hinder the inversion rotation of the inversion handle 31.

Here, the engaging projection 34 of the reversing handle 31
When the engaging projection 34 is rotated upward, the engaging cam body 38 located on the inner side can escape on the inner inclined surface so that the engaging cam body 38 does not interfere when the engaging protrusion 34 rotates upward. Also,
As described above, when the reversing handle 31 is rotated in reverse by depressing the push button handle 32, the slide cam 33 is rotated.
By inverting the reversing handle 31 while sliding the slide cam 33 against the spring piece 33a, the reversing handle 31 and the slide cam 33 can smoothly rotate the reversing handle 31 without receiving sliding frictional resistance. it can.

When the reversing handle 31 is reversingly rotated as described above, the coil spring 30 reciprocates and swings, the opening / closing body 24 is reversed, and the movable contact 29 is separated from the one fixed contact 25a with which the movable contact 29 is in contact. , Comes into contact with the other fixed contact 25b. After the reversal, when the pressing force of the piano handle 43 is released, the return spring piece 37a of the return spring 37 is released.
As a result, the push button handle 32 is pushed up, and the piano handle 43 also returns to the original state. At the same time, the slide cam 33 is slid and returned to the central portion by the spring force of the spring piece 33a, as shown in FIG. Piano handle 4 in this state
3 is pressed down, the opening / closing body 24 is operated in the same manner as described above.
Can be inverted. After the reversal, if the pressing force of the piano handle 43 is released, the state returns to the state shown in FIG.

That is, FIG. 14 shows a state before the operation of the piano handle 43, and the movable contact 29 of the opening / closing body 24 is inclined and contacts the fixed contact 25b. Then, by pushing the piano handle 43 and passing the opening / closing body 24 at the neutral position in FIG. 15, the opening / closing body 24 is inverted and comes into contact with the fixed contact 25 a as shown in FIG. 16. Next, when the pressing operation on the piano handle 43 is released, the piano handle 43 returns as shown in FIG. 17 as described above.

[0019]

In recent years, inverter-type lighting fixtures have increased in number. However, since inverter-type lighting fixtures have capacitors in their circuits, the inrush when switching on the switch-in type lighting fixtures. If the current is 15 A full rating, it may exceed 500 A. In the case of a conventional incandescent lamp of 15 A, the inrush current is about 200 A, so that even a switch satisfying the incandescent lamp opening / closing performance may not be used for an inverter-type lighting device.

In addition, in the case of an inverter type lighting device, the peak of the rush current is about 0.2 msec, and there is a problem that an arc is easily generated because it matches the bouncing timing of the switch. FIGS. 18A and 18B show the above state, in which FIG. 18A shows the bounce of the switch, and FIG. 18B shows the inrush current in that case.

FIGS. 19 to 21 show the mechanism of bounce occurrence at the contacts. FIG. 19 shows the state where the contacts 25a and 29 of FIG. 17 are closed, and FIG. As shown in the figure, when the opening / closing body 24 is reversed, the opening / closing body 24 rebounds due to the impact of the rush, and the contact 25
a, 29 floats. This state is the state shown in FIG.
Then, the opening / closing body 24 returns again and the contacts 25a and 29 are turned on. This state corresponds to a portion c in FIG.

FIG. 22 shows the terminal plate 18, and the terminal plate 1
8 is formed shorter than the other terminal plate 20 due to the layout. Since the terminal plate 18 has a larger spring constant than the terminal plate 20, the bounce time is longer. The other terminal plate 20 has a long snap portion from the terminal portion to the contact portion due to the layout inside the switch, and has a small spring constant.

Therefore, by lowering the spring constant of the terminal plate 18 to the same level as that of the terminal plate 20, it is necessary to improve the followability of the fixed contact to the movement of the movable contact when the switch is turned on, and to shorten the bounce. . The present invention has been made in view of the above points, and has as its object to reduce the spring constant of one terminal plate so that the contact bounce at the time of contact ON is shortened as much as possible, and the consumption of the contact due to an arc is reduced. The switch is provided.

[0024]

SUMMARY OF THE INVENTION claims 1 invention, the opening and closing member to switch the contacts by performing an inversion operation by operating the handle and one end portion attached to a movable contact that faces the fixed contact in the opening and closing member and a different pair of terminal plates having attached to length, the shorter pin plate length pressed wire is connected
The opposing piece, the pressing piece and the opposing piece
A terminal part integrally formed with a connecting piece for connecting the
The fixed contact is attached to the part and it is opposite to the holding piece in the facing piece.
A contact holding piece facing the opposite piece on the opposite side, and one side edge of the opposite piece
And a joint that connects the other end of the contact holding piece to one side edge of the contact holding piece.
No slit is formed to separate from the opposing piece except for the edge.
Things .

According to a second aspect of the present invention, the opening / closing body is provided in a thickness direction.
Is formed with a through hole .

[0026]

According to the first aspect of the present invention, the terminal plate having the shorter length faces the holding piece to which the electric wire is connected and the holding piece.
And the connecting piece that connects the holding piece and the facing piece
Terminals formed on the body and fixed contacts attached to one end
Opposes the opposing piece on the opposite side of the holding piece in the opposing piece
Contact holding piece, one side edge of the opposing piece and the other end of the contact holding piece
A lug portion connecting to one side edge, and the lug portion is an opposing piece.
Cut from the opposite piece except for one side edge
By forming a slit for separating, the spring constant of the terminal plate is reduced from the conventional one without changing the positional relationship between the terminal portion and the fixed contact, and the contact bounce at the time of contact ON is shortened as much as possible. It is possible to reduce the consumption of the contacts due to the arc. Further, the invention of claim 2 is based on claim 1
In the invention of the above, the opening and closing body has a hole penetrating in the thickness direction.
Since being made, Rukoto lowering the stiffness and the mass of the closing body
It can be, lowering the impact force absorbed by the repulsive force at the time of contact is on, as short as possible contact bounce when contact is on, it is possible to reduce the consumption of contacts by the arc.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. Since the configuration of the entire switch is the same as the conventional example,
The gist of the present invention will be described in detail. FIG. 1 shows an overall sectional view, and FIG. 2 shows a terminal plate 18 . Terminal board 1
8 is a holding piece to which an electric wire is connected as shown in FIG.
(Left piece in FIG. 2 (b)), facing the holding piece
Opposing piece (opposed to the left piece in the left-right direction of FIG. 2B)
Piece), the connecting piece that connects the holding piece and the facing piece
A terminal formed on the body and a fixed contact 25a at one end are provided.
To the opposite piece on the opposite side of the
The contact holding piece facing, one side edge of the facing piece and the contact holding piece
And a jumpsuit 61 connecting one side edge of the end.
Except for one side edge of the connecting piece on the facing piece,
A slit 62 is formed to be separated therefrom. in short,
In the present embodiment, the width of the jumper portion 61 between the terminal portion and the contact portion, that is, the fixed contact 25a is formed to be narrower than in the related art, and the slit 62 is formed as shown in FIG.
The spring constant of the terminal plate 18 is reduced.

That is, the terminal plate 18 cannot be formed as long as the terminal plate 20 due to the layout, so that the slit 62 is formed in the
By the narrower, by issuing the same effect as a longer part of the tool Nagi, in which a smaller spring constant. Therefore, the contact bounce at the time of contact ON can be shortened as much as possible, and wear of the contacts 25a and 29 due to the arc can be reduced.

Also, without changing the switch itself,
The improvement can be achieved only by partially modifying the mold of one terminal plate 18. (Embodiment 2) By the way, when the switch contact is turned on, the opening / closing body 24 hits the fixed contact 25a of the terminal plate 18, but the opening / closing body 24 rebounds due to the repulsive force of the impact at that time and bounces slightly away from the fixed contact 25a. Will occur.

If this impact force is absorbed, the repulsive force can be reduced. As means for reducing the repulsive force, the rigidity of the opening / closing body 24 is reduced (the spring constant is reduced). The mass of the opening / closing body 24 is reduced. In this embodiment, both are used in combination to increase the absorption of the impact force and suppress the generation of the impact force.

FIG. 3 shows a specific embodiment of the opening / closing body 24. Holes 63 and 64 are formed in the center of the opening / closing body 24, and one end of the hole 64 having a slit 65 is opened. . FIG. 4 shows a cutout 66 at the end of the opening / closing body 24.
Is provided. Thus, the opening 63, the opening 63,
By providing the slit 64, the slit 65, the notch 66, and the like, the rigidity and the mass of the opening / closing body 24 can be reduced. Further, the rigidity and the mass may be reduced by reducing the plate thickness of the opening / closing body 24. Further, the opening / closing body 24 may be formed by combining holes, slits, and plate thicknesses. Incidentally, the terminal plate on the fixed contact side may be the case of the above embodiment or a conventional one.

In this way, the opening / closing body 24 penetrates in the thickness direction.
The through hole is formed to reduce the rigidity and mass of the opening / closing body 24, thereby absorbing the impact force at the time of contact ON and reducing the repulsive force, shortening the contact bounce at the time of contact ON as much as possible, Wear can be reduced. Also,
The switch opening / closing performance can be improved only by changing the opening / closing body 24 without changing the switch body.

[0033]

According to the first aspect of the present invention, as described above, an opening / closing body for switching a contact by performing a reversing operation by operating a handle, and a fixed contact opposed to a movable contact attached to the opening / closing body are provided at one end. and a different pair of terminal plates having attached to length, the shorter pin plate length, pressing the electric wire is connected
Piece, the opposite piece facing the holding piece, the holding piece and the facing piece
A terminal part formed integrally with a connecting piece to be connected, and one end part
Fixed contact is attached to the opposite piece to the holding piece on the opposite piece
Contact holding piece facing the opposite piece on the side, and one side edge of the opposite piece
And a connecting portion connecting the one side edge of the other end portion of the contact holding piece, jumpsuit section, one side of the connecting side portions in facing plates
No slit is formed to separate from the opposing piece except for the edge.
Because it is shall, the shorter terminal plate length, wire contact
Continued holding piece, facing piece facing the holding piece, holding
An end formed integrally with a connecting piece for connecting the piece and the opposing piece
The fixed contact is attached to one end of the
A contact holding piece opposite to the opposing piece on the side opposite to the even piece;
A tube connecting one side edge of the facing piece and one side edge of the other end of the contact holding piece.
A pair of onions, and a pair of onions is connected to one side of the opposing piece.
The slit that separates from the opposing piece except for one side edge of the part
By being formed , the position of the terminal and the fixed contact
Conventional spring constant of the terminal plate without changing the relationship
Rimoshita Gaité, as short as possible contact bounce when contact is on, it is possible to reduce the consumption of contacts by the arc,
In addition, there is an effect that improvement can be achieved by only partially modifying the mold of one terminal plate without changing the switch itself.

According to a second aspect of the present invention, in the first aspect of the present invention, the opening / closing body has a hole formed therethrough in the thickness direction.
Since it has, the Rukoto lowering the stiffness and the mass of the closing body
Can, by lowering the impact force absorbed by the repulsive force at the time of contact is on, as short as possible contact bounce when contact is on, it is possible to reduce the consumption of contacts by the arc, also without changing the switch body In addition, there is an effect that the opening / closing performance of the switch can be improved only by changing the opening / closing body.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of a switch according to an embodiment of the present invention.

FIGS. 2 (a) to 2 (c) are a plan view, a front view, and a side view of the terminal plate according to the first embodiment.

FIGS. 3A and 3B are a front view and a side view of an opening / closing body according to the second embodiment.

FIGS. 4 (a) and 4 (b) are a front view and a side view of another embodiment of the opening / closing body according to the second embodiment.

FIG. 5 is a sectional view of a conventional push button switch.

FIG. 6 is a sectional view of a conventional push button switch.

FIG. 7 is an exploded perspective view of a conventional example.

FIG. 8 is an exploded perspective view of a conventional example.

FIG. 9 is a perspective view of a mounting frame.

FIG. 10 is an operation explanatory diagram of a conventional example.

FIG. 11 is an operation explanatory diagram of a conventional example.

FIG. 12 is an operation explanatory diagram of a conventional example.

FIG. 13 is an operation explanatory diagram of a conventional example.

FIG. 14 is an explanatory diagram of a conventional example.

FIG. 15 is an explanatory diagram of a conventional example.

FIG. 16 is an explanatory diagram of a conventional example.

FIG. 17 is an explanatory diagram of a conventional example.

FIG. 18 is an explanatory diagram of a contact bounce in a conventional example.

FIG. 19 is an explanatory diagram of a conventional example in which contact bounce occurs.

FIG. 20 is an explanatory diagram of a conventional example in which contact bounce occurs.

FIG. 21 is an operation waveform diagram of a conventional example.

FIGS. 22A to 22C are a plan view, a front view, and a side view of the terminal plate according to the first embodiment.

[Explanation of symbols]

 5 Push button switch 18 Terminal board 24 Opening / closing body 25a Fixed contact 25b Fixed contact 29 Movable contact

Claims (2)

(57) [Claims] An opening / closing body for switching a contact by performing a reversing operation by operating a handle, and a pair of terminals having different lengths each having a fixed contact opposed to a movable contact attached to the opening / closing body attached to one end thereof. and a plate, the shorter terminal plate length, electrostatic
Holding piece to which the wire is connected, opposing piece facing the holding piece,
The holding piece and the connecting piece that connects the opposing piece are integrally formed.
Terminal and fixed contacts attached to one end and
Contact holding piece opposite to the opposing piece on the side opposite to the holding piece
And one side edge of the opposing piece and one side edge of the other end of the contact holding piece.
And a connecting portion for connecting, communicating the jumpsuit portion, facing plates
Slip to be cut off from the opposing piece except for one side edge of the piece side part
A switch characterized in that a switch is formed . 2. The opening / closing body is formed with a hole penetrating in the thickness direction.
Switch according to claim 1, characterized in that is.