JPH0577130B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a switch that opens and closes between a movable contact and a fixed contact by reversing the operation of an operator.

[Prior Art] Conventional switches of this type include those shown in FIGS. 7 to 9, for example.

In FIG. 7, 1 is a case body, 2 is an operator rotatably supported on the case body 1, 3 is an actuation arm provided on the back side of the operator 2, and 4 is a rotating arm on the case body 1. A movably supported pivot shaft 5 is a protrusion provided on the pivot shaft 4 and engages in a recess provided in the center of the lower surface of the actuating arm 3. Further, 6 is a movable frame (Fig. 8), 7 is a movable contact provided on the movable frame 6, 8 is a fixed contact provided on the case body 1 side, 9
is a terminal plate (FIG. 9) connected to the electric wire 10, and the movable frame 6 has one end engaged with and supported by the terminal plate 9, and the other end engaged with a groove 11 provided on the side of the rotation shaft 4. It matches.

When one end of the operator 2 is pressed, it rotates around the central shaft portion, and the operating arm 3 provided on the back side applies rotational force to the rotation shaft 4 via the protrusion 5. Due to the rotation of the rotation shaft 4, the movable frame 6, which has one end engaged with the groove 11, moves the terminal plate 9 at the other end.
The movable contact 7 and the fixed contact 8 are thereby connected and disconnected to open and close the electric circuit.

[Problems to be Solved by the Invention] However, in such a conventional switch, a recess 12 is formed at one end of the movable frame 6 having the movable contact 7, as shown in FIG. As shown in FIG. 9, a pair of notches 13 are formed at the upper end of the terminal plate 9 to which the electric wires 10 are connected, and the recesses 12 are engaged with these notches 13 to close the movable frame 6.
Since the structure supports the switch in a swingable manner, there is a problem in that the engaging portion generates heat when energized, which may impede the opening and closing of the switch.

Furthermore, the shaft portion of the operator 2 and the rotating shaft 4 are pivotally supported in the case body 1, and not only is the installation direction for inserting and fixing the terminal plate 9 restricted, but also the direction in which the terminal plate 9 is inserted and fixed is restricted. Movable frame 6 between rotating shaft 4
Since it was necessary to span the parts, the assembly work became very complicated and required skill.

Furthermore, if another conventional switch is used as a load for a high power factor fluorescent lamp, an overcurrent will flow when the switch is turned on, causing arcing and welding the contacts, making it impossible to open the contacts. Things were hot too.

The present invention has been made in view of such conventional problems, and it improves the durability and reliability of the contact portion to ensure that the contact opens and closes, and also simplifies the assembly work. The purpose is to improve the ease of assembly of the type switch.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a container formed by a case body and a lid, and a container that is housed within the container and is swingably supported by the lid. In a switch comprising an operator, a switch mechanism that opens and closes between a movable contact and a fixed contact by swinging of the operator, and a connection terminal portion for an external electric wire electrically connected to the switch mechanism, the switch mechanism includes: A movable contact provided with the movable contact, and a movable contact on which the movable contact is placed and bent into a substantially M shape that supports the movable contact reversibly in cooperation with the operator, and is bent in the reversal direction and the reversal direction. a support body comprising a leaf spring elastically deformable in a direction intersecting the direction and connected to the one connection terminal, and biasing the movable contact element toward the operator side through the support body; It is characterized by having an elastic body that

[Function] Accordingly, in the present invention, when one end side of the swingable operator is pressed, the movable contactor supported swingably between the support body urged by the elastic body and the operator is pressed. is reversed, and the movable contact provided on the movable contact and the fixed contact are brought into contact and separated. This opens and closes the circuit that connects the connection terminals of external electric wires via the switch mechanism, suppresses heat generation from the joints, increases the durability and reliability of the contacts, and ensures reliable opening and closing of the contacts. At the same time, the ease of assembly is improved by making it possible to sequentially assemble each component.

[Example] Next, an example of the present invention will be described with reference to the drawings.

1 to 6 are diagrams showing one embodiment of the present invention.

First, to explain the configuration, 1 shown in Figures 1 to 3.
5 is a container, and this container 15 is a case body 16
and a lid body 17, and the lid body 17 has an operator 18.
The case body 16 has an operation hole 19 that opens upward, and the case body 16 has an electric wire insertion hole 20 into which a set of electric wires is individually inserted, and a tool insertion hole 22 for operating the release button 21. It is provided with a downward opening.

Inside the container 15, there are connection terminal portions 23,
24, a press spring 25 provided for each connection terminal portion 23, 24, and the release button 21 are housed therein. Each of the connection terminal parts 23 and 24 is formed by bending a plate material with high electrical conductivity (for example, a copper alloy plate close to pure copper) into a U-shape. Fold the part outward and attach a fixed contact 26 to the tip.
A contact piece 27 is formed, and a connecting terminal part 2 is formed.
4 has a connecting piece 28 formed by folding its lower end outward.

The connection terminal portions 23 and 24 are connected to a pair of horizontally protruding walls 29 provided on the case body 16 with the U-shaped opening side facing the bottom side of the case body 16.
and a pair of vertically protruding walls 30, and both protruding walls 29, 30 prevent outward deformation. As a result, each of the connecting terminal parts 23 and 24 is arranged above the wire insertion hole 20, and the above-mentioned pressing spring 25 arranged inside each of the connecting terminal parts 23 and 24 constitutes a screwless terminal. ing.

As shown in FIGS. 1 and 2, the pressing spring 25 is formed by bending one end into a U-shape and the other end into an S-shape, so that the pressing spring 25 extends in the same direction at both ends and connects the electric wire 50 at the tip edge. Locking pieces 25a and 25b are provided to lock the electric wire 50 and prevent the electric wire 50 from coming off. A release button 2 is disposed above the tool insertion hole 22 on the tip edge of both the locking pieces 25a, 25b.
1, and by moving the release button 21 with a tool such as a screwdriver, both locking pieces 25a,
By elastically deforming 25b, the connecting terminal portion 2
3 (or 24) can be unlocked.

In addition, the connecting piece 28 provided on the connecting terminal portion 24
The connecting pieces 32 of the support body 31 are overlapped and electrically connected to each other, and the housing is housed in the case body 16 in this state. The support body 31 consists of the connection piece 32 and a plate spring 33 bent into a substantially M-shape, and the plate spring 33 has a V-shaped piece 34 and leg pieces 35 and 36 continuous on both sides thereof. , one leg piece 3
A connecting piece 32 is continuously and integrally formed on the side of 5. The length of the other leg piece 36 is set shorter than the length of the one leg piece 35, so that when the other leg piece 36 is stored in the case body 16, the other leg piece 36
6 and the bottom surface of the case body 16 to give the leaf spring 33 greater elasticity in the vertical direction and smaller elasticity in the lateral direction. Further, notches 37 are provided on both sides of the valley portion of the V-shaped piece 34, and a narrow portion formed inside the notch 37 engages a notch 39 provided at the lower end of the movable contact 38.
As a result, the movable contact 38 is elastically supported by the support body 31 from below.

As shown in FIGS. 3 and 5, the movable contact 38 has two slits 40 on the opposite side from the notch 39.
By providing the terminal piece 41 located in the center
and continuous side pieces 42 on both sides thereof. Then, a continuous U-shaped protrusion 43 is formed between the side pieces 42 on both sides, thereby increasing the rigidity of the side piece 42, and reversing the terminal piece 41 with respect to the swinging of the side piece 42. In addition to ensuring reliable operation, a movable contact 44 that protrudes laterally is fixed to the terminal piece 41.

Thus, the terminal piece 41 is installed opposite to the connecting piece 27 of one connecting terminal section 23, and the movable contact 3
8 to move the movable contact 44 to the fixed contact 26.
It is configured so that it can be brought into contact with and separated from.

Reference numeral 45 denotes a coil spring, which is a specific example of an elastic body that urges the plate spring 33 of the support body 31 from below toward the movable contact 38 side above. The upper end edge of the side piece 42 is engaged with a V-groove 47 provided on the lower surface of the operating arm 46 of the operator 18 (see FIGS. 3 and 4).

The operator 18 has an operation block 48 whose upper end protrudes outside through the operation hole 19, and the operation arm 46 which is continuously and integrally provided below the operation block 48. At the central portion in the longitudinal direction of the block 48 and on both sides in the width direction, a triangular fulcrum portion 49 that is pointed upward is formed to protrude laterally. The upper edge of each fulcrum portion 49 is pressed by the biasing force of the coil spring 45,
A downwardly opening fan-shaped groove 1 provided inside the lid body 17
It is pressed against the top of 8a. Therefore, the operator 18
is configured to be able to swing around the upper edge of the fulcrum portion 49, and the movable contact 38 is reversed depending on the direction of the swing.

The fixed contact 26, the support 31, the movable contact 38, the movable contact 44, and the elastic body 45 constitute a switch mechanism. Note that the support body 31 and the movable contactor 38 are formed of a plate material with high electrical conductivity, similarly to the connection terminal portions 23 and 24 described above.

Next, the operation of this embodiment will be explained.

FIG. 1 is a cross-sectional view showing the contacts 26 and 44 of this switch in a closed state, and from this state the operator 18
When the protruding side (the left side in the figure) is pressed, the operator 18 swings counterclockwise around the fulcrum 49, and the operating arm 46 integrated therewith swings in the same way. As a result, the side piece 42 whose upper edge engages with the V-groove 47 provided at the lower end of the actuating arm 46,
It swings to the right around the concave portion of the V-shaped piece 34 of the support body 31. As a result, the terminal piece 41 having the movable contact 44 swings to follow the movement of the side piece 42 after a slight time delay, so that the movable contact 44 swings away from the fixed contact 26. An electrical circuit is opened. Then, the right end of the operator 18 protrudes to the outside.

Next, when the protrusion on the right side of the operator 18 is pressed, the operator 18 swings clockwise, the actuating arm 46 swings the side piece 42 to the left, and the terminal piece 41 similarly moves in reverse. and swing to the left. As a result, the movable contact 44 contacts the fixed contact 26 and the electric circuit is closed.

In this case, a slit 40 is provided near the movable contact 44 of the movable contactor 38 so that the terminal piece 41 and the side piece 4
2 is formed, and a protruding strip 43 is further provided to form both pieces 41,
Because it has a structure that causes a time delay between 42 and 42,
The terminal piece 41 was able to slide and follow the swinging of the side piece 42 with extra force. Therefore, it is possible to prevent chattering between the movable contact 44 and the fixed contact 26 due to light contact with the operator 18 or input of vibration, etc., and to suppress wear of both contacts and improve durability. can be improved.

Further, the support body 31 is bent into a substantially M-shape, the length of one leg piece 36 is formed shorter than the length of the other leg piece 35, and the support body 31 is urged upward by the coil spring 45 to move in the vertical direction. Since the allowable amount of elastic deformation is set large and the allowable amount of elastic deformation in the left-right reversal direction is set small, the movable contact 38 can be smoothly reversed and the amount of movement can be set large. can.

That is, as shown in FIG. 6, the bottom of the V-groove 47 of the actuating arm 46 draws a trajectory of an arc X convex downward, while the upper edge of the side piece 42 of the movable contact 38 convex upward. Since the locus of the arc Y is drawn, there is an overlapping part S between the arcs X and Y, but
Since the leaf spring 33 of the support body 31 elastically deforms downward to absorb the overlapping portion S, the movable contact 44 slides open and close while sliding vertically relative to the fixed contact 26. Such sliding opening/closing between the contacts can reduce the occurrence of arcs at the contact portions, thereby preventing the contacts from welding when the switch is opened/closed, thereby improving the life of the switch.

Furthermore, in the above embodiment, there is no need to pivotally support the shaft of the operator and the rotation shaft on the case body as in the conventional case, and the component parts can be assembled sequentially, which simplifies the assembly work. This makes it possible to greatly improve the ease of assembly of this type of switch.

In addition, when connecting the wire 50 to this switch, it is sufficient to simply insert the wire 50 into the wire insertion hole 20 provided in the case body 16.

In this case, the pair of locking pieces 25a and 25b of the pressing spring 25 facing inside the wire insertion hole 20 are each bent inward, and the wire 5
Since the electric wire 50 is easily elastically deformed inward in response to an insertion force of 0, the electric wire 50 can be easily inserted. On the other hand, when the electric wire 50 is pulled out, each locking piece 25a, 25b is attached to the electric wire 50.
Since the leading edge of the electric wire 50 is bitten, the engagement of the electric wire 50 is not released.

In the above embodiment, a coil spring whose elasticity can be easily unified is used as the elastic body, but the present invention is not limited to this. For example, a cylindrical body made of a synthetic resin material,
Alternatively, various types of springs such as metal leaf springs, shape memory alloy springs, etc. can be adopted. Further, since both sides of the operator 18 are supported by the case body 16 by the fulcrum portion 49, the entire surface of the operator 18 can be illuminated by incorporating an indicator light inside.

[Effects of the Invention] As described above, according to the present invention, a container having a case body and a lid, a switch mechanism having a movable contact provided with a movable contact, a support body, and an elastic body, and an external electric wire are provided. Since the switch is configured with a connecting terminal part, heat generation from the engaging part is suppressed, and the durability and reliability of the contact point is increased.
The effect is that it is possible to provide a switch that can suppress welding of the contacts and perform the opening/closing operation reliably. Further, since the component parts can be assembled in sequence, the assembly work can be greatly simplified, and the ease of assembly of this type of switch can be greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a plan view showing the inside of the case body with the lid removed, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 The figure is a front view showing an example of the operator according to the present invention.
FIG. 5 is a perspective view showing the movable contact and the support body, FIG. 6 is an enlarged explanatory view of the main part of FIG. 1, FIG. 7 is a vertical sectional view showing the conventional switch, and FIG. 7 is a plan view of the movable frame, and FIG. 9 is a plan view of the terminal plate similarly shown in FIG. 7. 15...Container, 16...Case body, 17...
Lid body, 18...Controller, 21...Release button, 2
3, 24... Connection terminal part, 25... Press, 2
6... Fixed contact, 31... Support, 33... Leaf spring, 38... Movable contact, 44... Movable contact, 4
5... Coil spring, 49... Fulcrum part, 50
……Electrical wire.

Claims (1)

[Claims] 1. A container formed by a case body and a lid;
An operator is housed in the container and is swingably supported by the lid, a switch mechanism that opens and closes between a movable contact and a fixed contact by the swing of the operator, and an electrically connected switch mechanism. In the switch, the switch mechanism includes a movable contact provided with the movable contact, and a movable contact on which the movable contact is placed and is reversible in cooperation with the operator. a support body formed of a plate spring bent into a substantially M-shape to support the child and elastically deformable in the reversal direction and a direction crossing the reversal direction, and connected to the one connection terminal; A switch comprising: an elastic body that biases the movable contact toward the operator via the support. 2. The switch according to claim 1, wherein the elastic body is a coil spring interposed between the leaf spring and the case body.