JP2001351481A - Electrode structure of switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode structure of a switch having an easy composition in which contact edges can be contacted with equal contacting pressure to a fixed electrode. SOLUTION: In the electrode structure of the switch where two sheet board- like contact edges 16a and 16b elastically sandwich a fixed electrode 13 from both sides to keep closing state of a circuit, a contact part of both the contact edges 16a and 16b with which the fixed electrode 13 is contacted during a closed circuit, is divided into a shape of two forks of a front side contact segment 23 and a back side contact segment 24. Both the segment pieces 23 and 24 are reinforced and held strongly by attaching reinforcing components 17a and 17b which reinforce both the contact edges 16a and 16b to hold the contacting pressure to the fixed electrode 13 during a closed circuit, from the outside of both the contact edges 16a and 16b. The reinforcing components 17a and 17b are formed bending to the both contract edges 16a and 16b side, and the reinforcement support for the backside contact segment 24 is made to be weaker than that for the front side contact segment 23. By this, the amount of displacement of both the contact segments 23 and 24 in accordance with an open circuit operation is equalized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode structure of a switch in which a pair of contact blades can contact and separate from a fixed electrode.

[0002]

2. Description of the Related Art As shown in FIG. 11, bushings 51, opposing each other are provided on both side walls of a main body case of a switch.
52 are supported through. A fixed electrode 53 is provided at the inner end of one bushing 51, and a movable electrode 55 is rotatably mounted on a shaft 56 at the inner end of the other bushing 52 via a conductive rod 54. As shown in FIG. 12, the movable electrode 55 includes a pair of contact blades 55a and 55b, and the reinforcing members 57a and 57b are superimposed on the contact blades 55a and 55b from the outside. This reinforcing member 5
Reference numerals 7a and 57b reinforce the contact blades 55a and 55b to maintain the contact pressure against the fixed electrode 53 at the time of insertion. As shown in FIG. 13, the reinforcing members 57a, 57b
Are substantially the same as the two contact blades 55a and 55b, respectively. For this reason, both contact blades 55a and 55b are reinforced by substantially the same force over the entire surface by both reinforcing members 57a and 57b.

As shown in FIGS. 11 and 12, the contact blades 55a and 55b are connected to each other by a connecting shaft 58 at a substantially central portion thereof. Both contact blades 55a, 55b
Are coil springs 61, 61 interposed between the reinforcing members 57a, 57b and the head of the shaft pin 56, and the reinforcing members 5
The elastic force of the coil spring 62 interposed between the heads 7a and 57b and the connection shaft 58 enables the fixed electrode 53 to be squeezed from both sides. Further, both contact blades 55
A and 55b are configured to be movable in a direction away from each other along the shaft pin 56 and the connecting shaft 58 against the elastic force of the springs 61 and 62. The connecting shaft 58 is operatively connected to an externally operable opening / closing mechanism (not shown) via a link 59 and a lever 60. As the opening / closing mechanism is driven, the movable electrode 55 has two points as shown in FIG. It moves between the loading position shown by the chain line and the open position shown by the solid line.

When the movable electrode 55 is at the open position,
The two contact blades 55a and 55b are urged in the direction approaching each other by the elastic force of the two springs 61 and 62, and
The distance between a and 55b is slightly smaller than the width of the fixed electrode. In this state, when the opening / closing mechanism is driven to be closed and the link 59 is pushed down, the two contact blades 55a, 55
b rotates in the closing direction using the shaft pin 56 as a rotation fulcrum.
The contact blades 55a and 55b expand along the shaft pin 56 and the connecting shaft 58 against the elastic force of the springs 61 and 62 based on the sliding contact with the fixed electrode 53. Double contact blade 55
When the contact blades 55a and 55b are further rotated in the loading direction and move to the loading position, the contact blades 55a and 55b
Due to the elastic forces of 1, 62, the fixed electrodes 53 come into contact with both sides in parallel. For this reason, both contact blades 55a, 55
5b contacts the fixed electrode 53 with an even contact pressure, and a predetermined energizing area is secured.

However, the electrode structure of the switch requires the coil springs 61 and 62 for urging the contact blades 55a and 55b in a direction approaching each other, and thus has a problem that the configuration is complicated.

Therefore, in order to solve this problem, FIG.
A switch electrode structure as shown in FIG. 4 has been conventionally proposed. That is, in the electrode structure of this switch, the two springs 61 and 62 are omitted, and the two contact blades 55 are used.
The interval between a and 55b is set to be slightly smaller than the width of the fixed electrode 53. And both contact blades 55a, 5
5b itself and its reinforcing members 57a, 57b
The contact blades 55a and 55b are brought into contact with the fixed electrode 53 at a predetermined contact pressure by the elastic force from the contact blades 55a and 55b.

[0007]

However, the conventional switch electrode structure has the following problems. That is,
In the contact blades 55a and 55b, the contact portions with the fixed electrode 53 are not connected to each other, but are separated from the connection shaft 58 by a predetermined distance. The interval between the contact blades 55a and 55b is set to be slightly smaller than the width of the fixed electrode 53. For this reason, at the time of loading, both contact blades 55a, 55
b slides on the distal end of the fixed electrode 53, and
Curved in directions away from each other with 8 as a fulcrum. The amount of displacement of the contact blades 55a and 55b in the direction away from each other increases toward the tip. As a result, both contact blades 5
5a and 55b contact only the tip of the fixed electrode 53, and a predetermined gap is formed between the tip of both contact blades 55a and 55b and the fixed electrode 53. That is, both contact blades 55a, 55
The contact pressure of the fixed electrode 5b with respect to the fixed electrode 53 decreases toward the tip.

Therefore, the elastic force of the contact blades 55a and 55b and the elastic force of the reinforcing members 57a and 57b do not act uniformly on the contact surfaces of the contact blades 55a and 55b with the fixed electrode 53, and both contact blades 55a and 55b do not act uniformly. There has been a problem that the contact pressure of the blades 55a and 55b with the fixed electrode 53 becomes non-uniform. In addition, there is a problem that a sufficient contact area (a current-carrying area) cannot be secured because a gap is formed between the distal ends of the contact blades 55a and 55b and the fixed electrode 53.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a switch capable of bringing a contact blade into contact with a fixed electrode with a uniform contact pressure with a simple structure. To provide an electrode structure.

[0010]

According to a first aspect of the present invention, there is provided an electrode structure of a switch in which a two-plate movable electrode elastically sandwiches a fixed electrode from both sides to maintain a closed state. The contact part with the fixed electrode when the electrode is closed,
The front contact part and the rear contact part are divided into a forked shape, and a reinforcing member for reinforcing the movable electrode and holding the contact pressure at the time of closing is overlapped from the outside of the movable electrode, and the front contact part is replaced with the rear contact part. The gist of the present invention is that the supporting portion is weaker than the supporting portion, or the rear contact portion is not supported.

According to a second aspect of the present invention, in the first aspect of the present invention, the reinforcing member has a reinforcing rib formed on a back portion on the side opposite to the contact portion, and the front portion is formed on the contact portion side. The gist is that a reinforcing support member is provided only in a portion corresponding to the contact portion, and its base end is bent toward the movable electrode to impart elasticity.

According to a third aspect of the present invention, in the second aspect of the present invention, the front end of the reinforcing support member faces a contact portion of the front contact portion with the fixed electrode, and only the same portion is reinforced. The gist is to support them.

According to a fourth aspect of the present invention, in the third aspect of the present invention, an auxiliary support member is protruded from a distal end of the reinforcement support member to a base end side of the reinforcement member, and a fixed electrode of a rear contact portion is provided. The point is that the contact portion with the support is reinforced and supported. (Operation) Therefore, in the invention described in claim 1, the front contact portion is stronger than the rear contact portion, or only the front contact portion is reinforced and supported by the reinforcing member. That is, at the time of injection, the front contact portion having a larger displacement amount in the direction away from each other than the rear contact portion has a smaller displacement amount in the direction away from each other than the front contact portion as compared with the front contact portion. Strongly reinforced and supported. For this reason, the displacement amount of the front contact portion and the displacement amount of the rear contact portion at the time of insertion are balanced, and the displacement amounts of both contact portions are substantially the same.

According to the second aspect of the present invention, in addition to the operation of the first aspect of the present invention, at the time of injection, the front contact portion is urged toward the fixed electrode by the elastic force of the reinforcing member. The displacement of the parts in the direction away from each other is regulated. The rear contact portion is displaced in a direction in which the rear contact portion is separated from each other when the rear contact portion does not receive the elastic force from the reinforcing member. Therefore, with a simple configuration in which the reinforcing support member is bent, the amount of displacement of the front contact portion and the amount of displacement of the rear contact portion due to the closing operation can be balanced.

According to a third aspect of the present invention, in addition to the function of the second aspect of the present invention, only the contact portion of the front contact portion with the fixed electrode is reinforced and supported by the tip of the reinforcing support piece. Is done.

According to a fourth aspect of the present invention, in addition to the function of the third aspect, the contact portion of the rear contact piece with the fixed electrode is reinforced and supported by the auxiliary support piece. The supporting force of the auxiliary supporting piece is weaker than the supporting force of the reinforcing supporting piece.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the present invention is embodied in a switch electrode structure will be described below with reference to FIGS. (Overall configuration) As shown in FIG. 1, a power supply side bushing 11 and a load side bushing 12 are supported on both side walls 10a and 10b of a switch body facing each other so as to face each other for each of three phases. Have been. As shown in FIGS. 1 and 4, a fixed electrode 13 having a substantially octagonal cross section is protruded from an inner end of the power supply side bushing 11. Fixed electrode 13
A pair of tapered surfaces on both sides along the longitudinal direction are guide surfaces 13a. Further, both sides of the center of the fixed electrode 13 are formed as current-carrying contact surfaces 13b.

As shown in FIG. 1, the load side bushing 12
A conductive rod 14 protrudes from the inner end of the conductive rod 1.
A base end of a two-plate movable electrode 16 is rotatably supported on the base 4 via a shaft pin 15. As shown in FIGS. 2 and 3, the movable electrode 16 is a pair of flat contact blades 16a,
16b, and plate-like reinforcing members 17a, 17b superposed from outside of both contact blades 16a, 16b, respectively. Both contact blades 16a, 16b and both reinforcing members 1
A connection shaft 18 is inserted through substantially the center of 7a, 17b.
It can rotate integrally.

As shown in FIG. 1, one end of a drive link 19 is rotatably connected to the connection shaft 18, and the other end of the drive link 19 has an opening / closing mechanism (operable externally). (Not shown), the tip of a lever 20 operatively connected thereto is rotatably connected. Therefore, the movable electrode 16
As the opening / closing mechanism is driven, it moves around the shaft pin 15 between a closing position shown by a solid line in FIG. 1 and an opening position shown by a two-dot chain line.

(Contact Blade) As shown in FIG. 1, the contact portions of the contact blades 16a and 16b, that is, the contact portions with the fixed electrode 13 at the time of insertion are fixed to the fixed electrodes 13 at the time of insertion.
A contact portion 21 that intersects at right angles to the axis is provided. The front contact piece 23 and the rear contact piece 2 are formed in the contact portion 21 through a slit 22 formed in the approximate center thereof.
4 are divided into two parts. As shown in FIGS. 2 and 3, the inner surfaces of the front and rear contact pieces 23 and 24, that is, the inner surfaces of the contact portions 21, respectively, are energized surfaces that come into contact with the energized contact surface 13 b of the fixed electrode 13 at the time of insertion. 21
a.

(Reinforcing Member) As shown in FIGS. 3 to 5, the tip of each of the reinforcing members 17a and 17b has a J
A reinforcement support member 30 having a letter shape is provided, and the reinforcement support member 30 includes a reinforcement support piece 31 at a base end and an auxiliary support piece 32 at a tip end. The reinforcing support piece 31 is the front contact piece 2
3 and extends downward. Auxiliary support piece 32
Extends from the distal end of the reinforcing support piece 31 to the base end side of the reinforcing members 17a and 17b, and is formed continuously so as to correspond to the rear contact piece 24. The reinforcing support piece 31 is slightly bent toward both the contact blades 16a and 16b, respectively, at a boundary curve 33 at the base end. The fold curve 33 is a straight line that is inclined downward from above from the front end to the rear end of the reinforcing members 17a and 17b.

The two contact blades 16a, 1 are formed from the inner walls of the reinforcing members 17a, 17b of the reinforcing support piece 31 and the auxiliary support piece 32.
The amount of displacement to the 6b side is larger for the reinforcing support piece 31;
The auxiliary support piece 32 is smaller. Reinforcement support piece 3
When the support piece 1 and the auxiliary support piece 32 are superimposed on the contact blades 16a and 16b, the reinforcing support piece 31 presses the front contact piece 23 more strongly, and the auxiliary support piece 32 presses the rear contact piece 24 weaker from the outside. Will be. In addition, both reinforcing members 17
A reinforcing rib 34 is formed over a predetermined section at the upper part of the upper and lower reinforcing members 17a and 17b, that is, at the back of the reinforcing members 17a and 17b on the side opposite to the contact portion. It is bent to the sides 16a and 16b. Reinforcing rib 3
The bending amount of No. 4 is substantially the same as the thickness of both contact blades 16a and 16b. The reinforcing ribs 34 are for securing rigidity for preventing the distal ends of the contact blades 16a and 16b from opening at the time of closing.

As shown in FIG. 2 and FIG.
a, 16b, the front and rear contact pieces 2
Elastic forces corresponding to the amounts of displacement of the reinforcing support pieces 31 and the auxiliary support pieces 32 from the inner walls of the reinforcing members 17a and 17b act on the outer sides 3 and 24. That is, a stronger elastic force acts on the front contact piece 23 than on the rear contact piece 24. The front and rear contact pieces 23 and 24 are urged toward the both contact blades 16a and 16b by the elastic force of the reinforcing support piece 31 and the auxiliary support piece 32, respectively.

As described above, the reinforcing members 17a and 17b not only have the function of reinforcing and supporting the contact blades 16a and 16b, but also urge the contact blades 16a and 16b inward (toward the fixed electrode 13), respectively. It also has a function as
In the inserted state, the energizing surfaces 21a of the contact blades 16a, 16b press the energizing contact surface 13b of the fixed electrode 13 from both sides in contact with a predetermined contact pressure based on the elastic force of the reinforcing members 17a, 17b. That is, both contact blades 16a, 1
6b elastically clamps the fixed electrode 13 from the outside, whereby the closed state of the switch is maintained. (Operation of Embodiment) Next, the operation of the electrode structure of the switch constructed as described above will be described. As shown in FIGS. 1 and 6, when the switch is in the open state, the front and rear contact pieces 23 and 24 respectively include the reinforcing support piece 31 and the auxiliary support piece 3.
2 to the fixed electrode 13 side.
The distance between 6a and 16b is slightly smaller than the width of the fixed electrode 13.

In this state, when the opening / closing mechanism is driven, the contact blades 16a and 16b are moved through the lever 20 and the drive link 19 with the shaft pin 15 as a fulcrum in the closing direction, ie, to the left in FIG. Rotate. Then, the contact portions 21 of the contact blades 16a and 16b are expanded with the sliding contact with the guide surface 13a of the fixed electrode 13. At this time, the front and rear contact pieces 23 and 24 are curved and displaced in a direction away from each other with the connecting shaft 18 as a fulcrum, but this displacement is caused by the elasticity of the reinforcing support piece 31 and the auxiliary support piece 32 toward the fixed electrode 13. Regulated by force. Therefore, both contact pieces 23, 24
The tip does not open.

The elastic force applied to the contact pieces 23 and 24 by the reinforcing support piece 31 and the auxiliary support piece 32 is
The auxiliary support piece 32 side is smaller than that, which corresponds to the length of the front and rear contact pieces 23 and 24 at the time of insertion. In other words, the front contact piece 23 that is about to be displaced the most is pressed more strongly toward the contact blades 16a and 16b by the elastic force of the reinforcing support piece 31, and the rear contact piece 24 that is displaced smaller than the front contact piece 23 is The contact blades 16a, 16b are weakened by the elastic force of the auxiliary support pieces 32.
Pressed to the side. As a result, the amount of movement of the front and rear contact pieces 23 and 24 in the direction away from each other due to the input operation becomes substantially the same, and the front and rear contact pieces 23 and 24 sandwich the fixed electrode 13 in a substantially parallel state. .

When the contact blades 16a and 16b are further rotated to the left, the energizing surface 21a of the contact portion 21 becomes fixed electrode 13
Contact with the current-carrying contact surface 13b from both sides substantially in parallel with a predetermined contact pressure. And both contact blades 16a,
When 16b moves to the loading position shown in FIGS. 1 and 7, the loading is completed. In this closed state, the current-carrying surface 21a of the contact portion 21 is in contact with the current-carrying contact surface 13b of the fixed electrode 13 in a substantially parallel state from the outside. For this reason, the current-carrying surface 21a contacts the current-carrying contact surface 13b with a uniform contact pressure by the elastic force of the contact blades 16a and 16b and the elastic force of the reinforcing members 17a and 17b. In addition, since both surfaces 21a and 13b are in contact with each other over the entire area corresponding to the contact between current-carrying surface 21a and current-carrying contact surface 13b, a sufficient current-carrying area is secured. At the time of opening, the reverse operation is performed.

Therefore, according to the present embodiment, the following effects can be obtained. (1) Strength of the elastic force of the reinforcing support piece 31 and the auxiliary support piece 32 is set so that the front contact piece 23 is more strongly reinforced and supported than the rear contact piece 24. Therefore, the displacement amounts of the front contact piece 23 having the largest displacement and the rear contact piece 24 having the smaller displacement than the front contact piece 23 can be balanced. At the time of the closing operation, both contact blades 16a and 16b are fixed electrodes 1
3 and is displaced substantially in parallel in a direction away from each other, and contacts the fixed electrode 13 with a uniform contact pressure. Therefore, unlike the case where the front contact piece 23 and the rear contact piece 24 are reinforced and supported by the same elastic force, the two contact areas 21a, 21a,
13b contact each other, and a sufficient contact area can be secured.

(2) A part of both reinforcing members 17a, 17b is bent inward and overlapped from the outside of both contact blades 16a, 16b so that a predetermined elastic force acts on both contact blades 16a, 16b. did. For this reason, both contact blades 1
There is no need for a spring structure or the like for urging the 6a and 16b in directions approaching each other. Therefore, the configuration of the movable electrode 16 can be simplified.

(3) The bending curve 33 of the reinforcing members 17a and 17b is set to be a straight line inclined downward from above from the front end to the rear end of the reinforcing members 17a and 17b. Therefore, the reinforcing members 1 of the reinforcing support pieces 31 and the auxiliary support pieces 32
The amount of displacement from the inner wall of 7a, 17b is
Are larger and the auxiliary support piece 32 is smaller. Therefore, the strength of the elastic force acting on both the contact blades 16a, 16b of the reinforcing support piece 31 and the auxiliary support piece 32 is made to correspond to the length of the mutually separated contact blades 16a, 16b accompanying the closing operation. be able to.

The above embodiment may be modified as follows. -The said contact part 21 may be formed as shown in FIG.
That is, the auxiliary support pieces 32 are omitted, and the reinforcing support pieces 3
1 has the same shape as the front contact piece 23 of both contact blades 16a and 16b. The front end of the reinforcing support piece 31 faces the contact portion of the front contact piece 23 with the fixed electrode 13 so that only the same portion is reinforced and supported. FIG. 8 shows only one reinforcing member 17b. In this way, the rear contact piece 24 is not reinforced and supported, and the contact portion of the front contact piece 23 that is about to be displaced most with the fixed electrode 13 can be efficiently and strongly reinforced.

The contact portion 21 may be formed as shown in FIG. That is, the auxiliary support piece 32 is formed so as to extend at the tip end of the reinforcement support piece 31 so as to form an L-shape with the reinforcement support piece 31. FIG. 9 shows only one reinforcing member 17b. Even in this case, the front contact piece 23 is strong,
The rear contact piece 24 is weakly reinforced and supported. Therefore, it is possible to balance the movement amounts of the front contact piece 23 and the rear contact piece 24 accompanying the closing operation.

The contact portion 21 may be formed as shown in FIGS. 10 (a) and 10 (b). That is, the auxiliary support piece 32 is formed so as to extend in an L-shape with the reinforcing support piece 31 at the tip of the reinforcing support piece 31 without bending the reinforcing support piece 31 inward. The reinforcing projections 41 and the auxiliary projections 42 are provided on the inner surfaces of the distal ends (the side surfaces of the contact blades 16a and 16b) of the reinforcing support pieces 31 and the auxiliary support pieces 32 so as to correspond to the front contact piece 23 and the rear contact piece 24, respectively. . The projecting height of the reinforcing projections 41 from the reinforcing support pieces 31 is made larger than the projecting height of the auxiliary projections 42 from the auxiliary supporting pieces 32. Also in this case, the front contact piece 23 can be reinforced and supported more strongly than the rear contact piece 24.

The reinforcing members 17a and 17b may be slightly projected from the tips of the contact blades 16a and 16b, respectively. In this case, the protruding portions of the reinforcing members 17a and 17b function as arcing horns.

Next, technical ideas other than the claimed invention which can be grasped from the embodiment will be described below together with their effects. The electrode structure of the switch according to claim 2, wherein a base end of the reinforcing support member is formed so as to be inclined downward from above from a front end to a rear end of the reinforcing member. With this configuration, the strength of the elastic force acting on both the contact blades of the reinforcing support member and the auxiliary support member gradually changes in accordance with the length of the contact blades separated from each other due to the throwing operation. Can be done.

A protrusion is formed on the reinforcing member so as to correspond to at least the front contact piece of the front contact piece and the rear contact piece; and a protrusion is formed to correspond to each of the front and rear contact pieces. 2. The electrode structure for a switch according to claim 1, wherein, when doing so, the protrusion height of the protrusion corresponding to the front contact piece is greater than the protrusion height of the protrusion corresponding to the rear contact piece. Also in this case, the displacement amount of the front contact piece and the rear contact piece can be balanced, and the fixed electrode can be contacted with a uniform contact pressure.

[0037]

According to the first aspect of the present invention, both the front and rear contact portions come into contact with the both side surfaces of the fixed electrode in a substantially parallel state at the time of insertion, so that the two contact blades contact the fixed electrode. And can be brought into contact with a uniform contact pressure.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in the above, there is no need to incorporate a coil spring or the like that biases both contact blades in the direction approaching each other,
The configuration can be simplified.

According to the invention set forth in claim 3, according to claim 2
In addition to the effects of the invention described in (1), at the time of loading, the contact portion of the front contact portion which is most likely to move in the direction away from each other with the fixed electrode can be efficiently reinforced and supported.

According to the invention described in claim 4, according to claim 3,
In addition to the effects of the invention described in (1), it is possible to finely balance the amount of displacement of the front and rear contact portions in the direction away from each other.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a switch.

FIG. 2 is a bottom view of a main part of the switch in a closed state.

FIG. 3 is an exploded perspective view of a movable electrode.

FIG. 4 is a perspective view of a movable electrode and a fixed electrode.

FIG. 5 is a perspective view of a movable electrode.

FIG. 6 is a sectional view taken along line 1-1 in an open state of FIG. 1;

FIG. 7 is a cross-sectional view taken along line 1-1 in the inserted state of FIG. 1;

FIG. 8 is a front view of a reinforcing member according to another embodiment.

FIG. 9 is a front view of a reinforcing member according to another embodiment.

FIG. 10A is a front view of a reinforcing member according to another embodiment. (B) is a bottom view of a reinforcing member in another embodiment.

FIG. 11 is a front view of a main part of a conventional switch.

FIG. 12 is a plan view of a main part of a conventional switch.

FIG. 13 is a plan view of a main part of a conventional switch.

FIG. 14 is a front view of a conventional reinforcing member.

[Explanation of symbols]

13: fixed electrode, 13b: energizing contact surface, 16: movable electrode, 16a, 16b: contact blade, 17: reinforcing member, 21:
Contact part, 21a: energizing surface, 23: front contact piece (front contact part), 24: rear contact piece (rear contact part), 34: reinforcement rib, 30: reinforcement support part, 31: reinforcement support piece (reinforcement) Support member), 32: auxiliary support piece (auxiliary support member), 33: folding curve, 41: reinforcing projection, 42: auxiliary projection.

Claims (4)

[Claims] 1. An electrode structure of a switch in which a two-plate movable electrode elastically sandwiches a fixed electrode from both sides to maintain a closed state, wherein a contact portion of the movable electrode with the fixed electrode when the movable electrode is closed is The front contact part and the rear contact part are divided into a forked shape, and a reinforcing member for reinforcing the movable electrode and holding the contact pressure at the time of closing is overlapped from the outside of the movable electrode, and the front contact part is replaced with the rear contact part. An electrode structure of a switch configured to be weakly reinforced and supported or not to support the rear contact portion. 2. The reinforcing member has a reinforcing rib formed on a back portion on a side opposite to the contact portion, and a reinforcing support member is provided only on a portion corresponding to the front contact portion on the contact portion side. The electrode structure of a switch according to claim 1, wherein the end is bent toward the movable electrode to impart elasticity. 3. An electrode structure for a switch according to claim 2, wherein a front end portion of said reinforcing support member faces a contact portion of said front contact portion with said fixed electrode, and only said portion is reinforced and supported. . 4. An auxiliary support member protruding from a distal end of the reinforcement support member to a base end side of the reinforcement member to reinforce and support a contact portion of the rear contact portion with the fixed electrode. Switch electrode structure.