JPH01151122A - Switch - Google Patents

Abstract

PURPOSE:To improve the durability and the reliability of a contact part, and also to simplify an assembling work by providing a supporting body inversively supporting a movable contact provided with a movable contact point, coacting with an operation piece, and providing an elastic body energizing the movable contact to the operation piece side via the supporting body. CONSTITUTION:When a projected part of the right side of an operation piece 18 is pressed, a side part piece 42 fluctuates to the left side with an operation arm 46 with the piece 18 fluctuating to the clockwise direction, and a terminal piece 41 inversibly acts to fluctuate to the left direction. This causes an electric circuit to be closed with a movable contact point 44 contacting a fixed contact point 26. In this case, the piece 41 can slidingly follows keeping strength in reserve since the pieces 41 and 42 are formed with a slit 40 provided at the vicinity of the point 44 and moreover a time lag between both pieces 41 and 42 is made to occur with a projected thread 43 provided in this structure. Consequently, the exothermicity from a locking part can be restrained, and the durability and the reliability of a contact point improved. And an assembling work can be simplified since components can be assembled in order.

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 a reversing operation of an operator.

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

In Fig. 7, l is the case body, 2 is an operator rotatably supported on the case body 1, 3 is an operating arm provided on the back side of the operator 2, and 4 is a rotary arm that rotates on the case body l. 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 l side, 9
is a terminal plate (FIG. 9) connected to the electric wire 10. The movable frame 6 has one end engaged with and supported by the terminal plate 9, and the other end is a groove 11 provided on the side of the rotation shaft 4. is engaged in.

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, whose one end is engaged with the groove 11, swings around the engagement portion with the terminal plate 9 at the other end, thereby connecting the movable contact 7 and the fixed contact. The electric circuit is opened and closed by connecting and disconnecting with 8.

[Problems to be solved by the invention However, with such conventional switches,
As shown in FIG. 8, a recess 12 is formed at one end of the movable frame 6 having the movable contact 7, and as shown in FIG. 9, a pair of notches are formed at the upper end of the terminal plate 9 to which the electric wire 10 is connected. 13, and the movable frame 6 is swingably supported by engaging the recesses 12 in the notches 13, so when electricity is applied, heat is generated at the engaging portions, which may hinder the opening and closing of the switch. There was a problem that it could happen.

In addition, the shaft portion of the operator 2 and the rotation shaft 4 are pivotally supported in the case body l, 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. Since it was necessary to hang the movable frame 6 between the rotary shaft 4 and the rotating shaft 4, there was a problem in that the assembly work was very complicated and required skill.

Furthermore, when other conventional switches are used as a load for high-strength skewer-type fluorescent lamps, an overcurrent flows when the switch is turned on, causing arcing and welding the contacts, making it impossible to open the contacts. There were some things.

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 various types of switches.

[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. The switch mechanism includes 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 that is electrically connected to the switch mechanism. A movable contact provided with a movable contact, a support that reversibly supports the movable contact in cooperation with the operator, and elasticity that urges the movable contact toward the operator via the support. It is characterized by having a body.

[Function] Accordingly, in the present invention, when one end side of the swingable operator is pressed, the movable contactor supported swingably between the support 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 with and separated from each other. This opens and closes the circuit that connects the connection terminals of the 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, each component can be assembled sequentially to improve ease of assembly.

[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 structure, 15 shown in FIGS. 1 to 3 is a container, and this container 15 consists of a case body 16 and a lid 17. The lid 17 has an operation hole through which the upper part of the operator 18 passes. 19 is opened upward, and the case body 16 is provided with a wire insertion hole 20 into which a set of electric wires is individually inserted, and a tool insertion hole 22 for operating a release button 21, which are opened downward. It is set up.

Inside the container 15, connection terminal portions 23 and 24 are provided.
A press spring 25 provided for each connection terminal portion 23, 24 and the release button 21 are housed therein. Each connection terminal portion 23, 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, and the connection terminal portion 23 has a midway portion in the longitudinal direction. A contact piece 27 is formed which is bent outward and has a fixed contact 26 at its tip, and the connecting terminal part 24 has a
The connecting piece 28 is formed by folding the lower end portion outward.

The connection terminal portions 23 and 24 are provided with a pair of horizontally protruding walls 29 and a pair of vertically protruding walls 30 provided on the case body 16 with the U-shaped opening side facing the bottom side of the case body 16.
Both protruding walls 29 and 30 prevent outward deformation. This results in
Each connection terminal portion 23, 24 is arranged above the wire insertion hole 20, and the above-mentioned press spring 25 arranged inside each connection terminal portion 23, 24 constitutes a screwless terminal.

As shown in FIGS. 1 and 2, the pressing spring 25 has one end bent into a U-shape and the other end bent into an S-shape, so that the pressing spring 25 extends in the same direction at both ends and holds the electric wire 50 at the tip edge. A locking piece 25a that locks and prevents the mold m, 50 from coming off.
, 25b are provided. Then, the re-inspection pieces 25a, 25
The tip edge of b faces the inner end surface of the release button 21 arranged above the tool insertion hole 22, and the re-inspection piece 25a is removed by moving the release button 21 with a tool such as a screwdriver.

By elastically deforming 25b, it is possible to release the electric wire 50 held between the connecting terminal portion 23 (or 24).

Further, the connecting piece 28 provided on the connecting terminal portion 24 is electrically connected to the connecting piece 32 of the support body 31 by overlapping it, and is housed in the case body 16 in this state. The support body 31 consists of the above-mentioned connection piece 32 and a plate spring 33 bent into an approximately M shape, and the plate spring 33 has a 7-shaped piece 34,
It has continuous leg pieces 35 and 36 on both sides, and the connecting piece 32 is continuously and integrally formed on either side of one leg piece 35. The length of the other leg piece 36 is set shorter than the length of one leg piece 35, so that the case body 16
A gap is provided between the other leg piece 36 and the bottom surface of the case body 16 when the leaf spring 33 is housed in the housing, thereby imparting elasticity to the leaf spring 33 that is large in the vertical direction and small in the lateral direction.

Further, a notch 37 is provided on both sides of each part of the 7-shaped piece 34, and a notch 39 provided at the lower end of the movable contact 38 is engaged with a narrow portion formed inside the notch 37, 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 to the notch 39, so that the movable contact 38 has a terminal piece 41 located in the center and side pieces continuous on both sides thereof. 42. And side pieces 42 on both sides
A continuous U-shaped protrusion 43 is formed in between, thereby increasing the rigidity of the side piece 42 and ensuring the reversal movement of the terminal piece 41 against the swinging of the side piece 42. , the terminal piece 41 has a movable contact 4 projecting laterally.
4 is fixed.

Thus, the terminal piece 41 is connected to the connecting piece 2 of one connecting terminal portion 23.
The movable contact 44 is configured to be able to be moved into and out of contact with the fixed contact 26 by swinging the movable contact 38.

Reference numeral 45 denotes a coil spring, which is a specific example of an elastic body that biases the leaf spring 33 of the support body 31 from below toward the movable contact 38 upward. The upper 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 operation element 18 includes an operation block 48 whose upper end protrudes outward through the operation hole 19, and this operation block 48.
The operating arm 46 is provided continuously and integrally on the lower side of the operating block 48, and a triangular fulcrum portion 49 that is pointed upward is provided at the central portion in the longitudinal direction and on both sides in the width direction of the operating block 48. It is formed protrudingly. The upper edge of each fulcrum portion 49 is pressed by the biasing force of the coil spring 45,
It is pressed against the top of a downwardly opening fan-shaped groove 18a provided inside the lid 17. Therefore, the operator 18 is placed at the fulcrum portion 49
The movable contact 38 is configured to be able to swing around the upper end edge as a fulcrum, and the movable contact 38 is reversed in accordance with the direction of the swinging force.

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 contact 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 sectional view showing the closed state of the contacts 26.44 of this switch. When the protruding side of the operator 18 (the left side in the figure) is pressed from this state, the operator 18 touches the fulcrum portion 49. It swings counterclockwise around the center, and the operating arm 46 that is integrated therewith swings in the same way. As a result, the actuating arm 4
side piece 4 whose upper edge engages with a V-groove 47 provided at the lower end of 6;
2 swings to the right around the concave portion of the 7-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 apart 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 and the operating arm 46 is moved.
causes the side piece 42 to swing to the left, and similarly the terminal piece 41 reverses and swings 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 contact 38 to form the terminal piece 41 and the side piece 42,
Furthermore, since the protrusion 43 is provided to create a time delay between the two pieces 41 and 42, the terminal piece 41 can slide with extra force to follow the swinging of the side piece 42. did it. 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 done.

Further, the support body 31 is bent into a substantially M shape, and the length of one leg piece 36 is formed shorter than the length of the other leg piece 35,
The support body 31 is urged upward by the coil spring 45 so that the allowable amount of elastic deformation in the vertical direction is set large and the allowable amount of elastic deformation in the left-right reversal direction is set small. The reversing operation can be performed smoothly and the amount of movement can be set large.

That is, as shown in FIG.
The bottom of the movable contact 38 draws a downwardly convex circular arc X, while the upper edge of the side piece 42 of the movable contact 38 draws an upwardly convex circular arc Y. Although an overlapping portion S occurs, the leaf spring 33 of the support body 31 elastically deforms downward and absorbs the overlapping portion S, so that the movable contact 44 does not slide vertically relative to the fixed contact 26. Open and close. Such sliding opening/closing between the contacts can reduce the occurrence of arcs at the contact portions, thereby preventing contact welding during opening/closing of the switch, 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 push spring 25 facing the inside of the wire insertion hole 20 are each bent inward, and easily elastically inward against the insertion force of the wire 50. Since the electric wire 50 is deformed, the insertion work of the electric wire 50 can be easily performed. On the other hand, when the electric wire 50 is pulled out, each of the locking pieces 25a,
Since the tip edge of the wire 25b is bitten, the attachment 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 body, 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, the durability and reliability of the contact is increased, and welding of the contact is suppressed to ensure reliable opening/closing operation. The effect is that it is possible to provide a switch that can perform the following operations. 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 one embodiment of the present invention, FIG. 2 is a plan view showing the inside of the case body with the lid removed, and FIG.
The figure is a cross-sectional view taken along the line ■-■ in FIG. 1, FIG. 4 is a front view showing an example of the operator according to the present invention, FIG. 5 is a perspective view similarly showing the movable contact and the support, and FIG. FIG. 7 is a longitudinal sectional view showing a conventional switch; FIG. 8 is a plan view of the movable frame shown in FIG. 7; FIG. 9 is also shown in FIG. 7. It is a top view of a terminal board. 15: Container 16 Two cases Main body 17: Lid 18: Operator 21: Release button
23, 24: Connection terminal section 25: Press spring 2
6: Fixed contact 31: Support body 33: Leaf spring 3
8: Movable contact 44 = Movable contact 45: Coil spring 49: Fulcrum portion 50: Wire patent applicant Jinbo Denki Co., Ltd. Agent Patent attorney Junior year 1) Osamu Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (2)

[Claims] (1) A container formed by a case body and a lid, an operator housed in the container and swingably supported by the lid, and a swing between the movable contact and the fixed contact. The switch mechanism includes a switch mechanism that opens and closes, and a connection terminal portion for an external electric wire that is electrically connected to the switch mechanism. 1. A switch comprising: a support body that supports the movable contact in a reversible manner; and an elastic body that biases the movable contact toward the operator via the support body. (2) The support body is a leaf spring that is bent into a substantially M-shape and is elastically deformable in the reversal direction and a direction crossing the reversal direction, and the elastic body includes the leaf spring and the case body. The switch according to claim 1, wherein the switch is a coil spring interposed between the switch and the switch.