WO2018123224A1

WO2018123224A1 - Switch

Info

Publication number: WO2018123224A1
Application number: PCT/JP2017/037896
Authority: WO
Inventors: 裕之藤田; 勇樹山本
Original assignee: オムロン株式会社
Priority date: 2016-12-27
Filing date: 2017-10-19
Publication date: 2018-07-05
Also published as: JP2018107025A; JP6729360B2

Abstract

To realize a highly durable and reliable switch. In this switch, while a mobile contact point part (13) is moving, the timing at which a contact part (13ab) arrives at the boundary between a front surface (3ha) and a front surface (9ea), and the timing at which a contact part (13bb) arrives at the boundary between a back surface (3hb) and a back surface (9eb), differ.

Description

switch

The present invention relates to a switch that opens and closes current.

Conventionally, there is known a switch that switches between an open state and a closed state of a circuit by performing a pressing operation. Such a switch comprises a normally closed fixed contact (or a normally open fixed contact) having a conducting area and an insulating area. Then, the slider is switched from the closed state to the open state (or from the open state to the closed state) by sliding from the conductive area to the insulating area (or from the insulating area to the conductive area).

However, in such a switch, particularly when used to open and close a large current, it is between the slider and the normally closed fixed contact (or normally open fixed contact) when the conduction state and the insulation state are switched. Arc discharge occurs. When the arc discharge occurs, the slider or the normally closed fixed contact (or the normally open fixed contact) is consumed.

Patent Document 1 discloses a switch device that solves this problem. In the switch device disclosed in Patent Document 1, a first contact portion sliding on a common fixed contact as the drive member moves up and down, and a second contact portion and a third contact portion of individual fixed contacts. The movable contact is formed with the second and third contact portions respectively making contact, and the second contact portion contacts the individual fixed contacts earlier than the third contact portion when the movable contact is moved. It is a structure. As a result, the second contact portion and the second contact portion are prevented from being consumed by arc discharge, and the contact life can be extended.

Japanese Patent Publication "Japanese Patent Application Laid-Open No. 2005-158636 (June 16, 2005)"

However, in the switch device disclosed in Patent Document 1, since the second contact portion and the third contact portion are disposed on the same plane, consumable powder generated at the contact portion where arc discharge occurs is It is easy to move to another contact point. Consumable powder moved to another contact point has a problem of causing conduction failure and insulation failure in the other contact point.

An aspect of the present invention is directed to achieving a switch with high durability and reliability.

In order to solve the above problems, the switch according to one aspect of the present invention is moved by being operated by an open / close contact portion, an operation member, and the operation member, and a movable contact portion sandwiching the open / close contact portion A switch comprising: a surface including a first conduction region and a first insulation region formed side by side along a moving direction of the movable contact portion; and a switching contact portion along the moving direction And a back surface including a second conduction region and a second insulation region formed side by side, the movable contact portion sliding on the first sliding portion sliding on the front surface, and the second sliding portion sliding on the back surface The second sliding portion, and the timing at which the first sliding portion reaches the boundary between the first conduction region and the first insulating region while the movable contact portion is moved; The sliding portion is the second conduction region and the second conduction region. It is different and the timing reaching the boundary with the insulating area.

According to one aspect of the present invention, a switch with high durability and reliability can be realized.

It is a perspective view which shows the external appearance of the switch which concerns on Embodiment 1 of this invention. It is an exploded perspective view showing the composition of the above-mentioned switch. It is a perspective view of the upper part of the slider and the base of a base in the said switch. It is a front view of the upper part of the base of a slider and a base in the said switch. FIG. 5 is a sectional view taken along line AA in FIG. 4; The operation of the above switch is shown, and (a) is a diagram showing a state in which one contact portion is in contact with the first conduction region and the other contact portion is in contact with the second conduction region, (B) is a figure which shows the state which one contact part contacts the 1st insulation area | region, and the other contact part contacts the 2nd conduction area, and (c) is one contact part It is a figure which shows the state which contacts the 1st insulation area | region and the other contact part is contacting the 2nd insulation area | region. It is sectional drawing of the slider of the switch as a modification of the said switch, and a normally-closed fixed contact part. The operation of the above switch is shown, and (a) is a diagram showing a state in which one contact portion is in contact with the first conduction region and the other contact portion is in contact with the second conduction region, (B) is a figure which shows the state which one contact part contacts the 1st insulation area | region, and the other contact part contacts the 2nd conduction area, and (c) is one contact part It is a figure which shows the state which contacts the 1st insulation area | region and the other contact part is contacting the 2nd insulation area | region. It is a front view of the upper part of the base of a slider and a base in the switch which concerns on Embodiment 2 of this invention. FIG. 10 is a cross-sectional view taken along line AA of FIG. Fig. 7 shows the operation of the switch, wherein (a) shows a state in which one contact portion is in contact with the first insulating region and the other contact portion is in contact with the second insulating region, (B) is a figure which shows the state which one contact part contacts the 1st conduction | electrical_connection area | region, and the other contact part contacts the 2nd insulation area | region, (c) is one contact part It is a figure which shows the state which contacts the 1st conduction | electrical_connection area | region, and the other contact part contacts the 2nd conduction | electrical_connection area | region. It is sectional drawing of the slider of the switch as a modification of the said switch, and a normally open fixed contact part. Fig. 7 shows the operation of the switch, wherein (a) shows a state in which one contact portion is in contact with the first insulating region and the other contact portion is in contact with the second insulating region, (B) is a figure which shows the state which one contact part contacts the 1st conduction | electrical_connection area | region, and the other contact part contacts the 2nd insulation area | region, (c) is one contact part It is a figure which shows the state which contacts the 1st conduction | electrical_connection area | region, and the other contact part contacts the 2nd conduction | electrical_connection area | region. FIG. 14 is a cross-sectional view of the slider and the normally-opened fixed contact portion in a state where the slider is not pressed by the push button in the switch according to Embodiment 3 of the present invention. It is a front view of the upper part of the base of a slider and a base in the switch which concerns on Embodiment 4 of this invention.

Embodiment 1
The switch 1A according to the first embodiment of the present invention will be described in detail with reference to FIGS.

(Configuration of switch 1A)
The configuration of the switch 1A will be described with reference to FIGS. 1 to 5.

FIG. 1 is a perspective view showing the appearance of the switch 1A. FIG. 2 is an exploded perspective view showing the configuration of the switch 1A. In the following description, the + x direction in FIG. 1 will be described as the forward direction, -x direction as the rear direction, + y direction as the right direction, -y direction as the left direction, + z direction as the upper direction, and -z direction as the lower direction.

As shown in FIGS. 1 and 2, the switch 1A fixes the case 2, the base 3, the push button (operation member) 4, the waterproof and dustproof rubber cap 5, and the rubber cap 5 to the case 2. The cap holder 6, the coil spring 7, the first fixed terminal 8, the second fixed terminal 9, and the slider 10 are provided.

The case 2 is constituted by a substantially rectangular first member 2a and a second member 2b which protrudes rightward from the side surface 2c of the first member 2a. The case 2 constitutes a housing of the switch 1A together with a side wall 3a of the base 3 described later.

As shown in FIG. 2, the first member 2 a has a cavity formed therein, and an opening 2 d formed on the surface facing the side surface 2 c. On the upper surface of the first member 2a, an insertion hole 2e for inserting a push button 4 described later, and a first recess 2f provided around the insertion hole 2e for attaching the rubber cap 5 and the cap holder 6 to the case 2 respectively. And the 2nd crevice 2g is formed.

In the second member 2b, an attachment hole 2h for attaching the switch 1A to a device on which the switch 1A is mounted is formed. Further, on the front surface of the first member 2a, an annular protrusion 2i for defining the mounting position of the switch 1A with respect to the above device is formed.

The base 3 includes side walls 3a and a base 3b as shown in FIG. The base 3 is formed of a resin and has an insulating property.

The side wall 3 a has a flat plate shape, and closes the opening 2 d of the case 2 to configure a case of the switch 1 A together with the case 2. At the lower part of the side wall 3a, two terminal holes 3aa and 3ab are formed aligned in the vertical direction.

The base 3 b is a plate-like body housed in the inside of a case constituted by the case 2 and the side wall 3 a. The base 3 b accommodates most of the first fixed terminal 8 and the second fixed terminal 9 described later inside, and supports the first fixed terminal 8 and the second fixed terminal 9.

FIG. 3 is a perspective view of the upper portion of the slider 10 and the base 3 b of the base 3 in the switch 1A. FIG. 4 is a front view of the upper portion of the slider 10 and the base 3 b of the base 3 in the switch 1A. As shown in FIGS. 3 and 4, a cylindrical rib 3d projecting upward is formed at the upper center of the base 3b. In the upper part of the base 3b, a protrusion 3e and a protrusion 3f protruding upward are formed on the right side (+ Y direction side) with the cylindrical rib 3d interposed therebetween, and the column rib 3d interposed therebetween On the left side (−Y direction side),

protrusions

3g and 3h protruding upward are formed.

FIG. 5 is a sectional view taken along line AA in FIG. As shown in FIG. 5, a level | step difference is formed in the upper surface of the protrusion part 3h. Thus, the upper end of the front surface 3ha of the projection 3h is positioned above the upper end of the rear surface 3hb of the projection 3h. Although not shown, no step is formed on the upper surface of the protruding portion 3f, and the upper surface is flat.

The push button 4 includes a pedestal 4a in which a recess is formed, and a cylindrical pressed portion 4b extending upward from the pedestal 4a. The pressed portion 4 b is disposed inside the case 2 so as to be movable in the vertical direction. An upper end portion of the pressed portion 4 b protrudes upward from the case 2 through the insertion hole 2 e of the case 2 and a through hole formed in the rubber cap 5. The push button 4 can be moved in the vertical direction by pressing the pressed portion 4 b from the outside by a lever or the like.

The first fixed terminal 8 is made of metal and has conductivity. The first fixed terminal 8 includes a first slider connecting terminal 8a extending in the vertical direction, an external terminal connecting terminal 8b having a surface perpendicular to the vertical direction, and a first slider connecting terminal 8a. And a connection portion 8c for connecting the external terminal connection terminal portion 8b.

The first slider connection terminal portion 8a is constituted by a buried portion 8d extending upward from the connection portion 8c and a first slidable portion 8e extending rightward from the buried portion 8d. There is. The buried portion 8 d is buried in the inside of the protrusion 3 e of the base 3. The first slidable portion 8 e protrudes from the projecting portion 3 e of the base 3 to the outside of the base 3, and the lower surface is in contact with the upper surface of the projecting portion 3 f of the base 3. The front surface of the first slidable portion 8e and the front surface of the projecting portion 3h exist on the same plane. Similarly, the rear surface of the first slidable portion 8e and the rear surface of the projecting portion 3h exist on the same plane.

The first slidable portion 8e of the first fixed terminal 8 is provided with a contact portion 12ab and contact of the slider 10, which will be described later, from when the push button 4 is not pressed until the push button 4 is completely pressed. The portion 12bb extends in the vertical direction so as to be able to contact the front surface and the rear surface of the first slidable portion 8e. As a result, the slider 10 and the first fixed terminal 8 are always in a state of being electrically connected. That is, the front and rear surfaces of the first slidable portion 8e function as a common fixed contact portion in the switch 1A.

A part of the external terminal connection terminal portion 8b is exposed from the switch 1A through the terminal hole 3aa formed in the side wall 3a of the base 3 and is connected to an external terminal (external circuit) not shown.

The second fixed terminal 9 is made of metal and has conductivity. The second fixed terminal 9 includes a second slider connection terminal 9a extending in the vertical direction, an external terminal connection terminal 9b having a surface perpendicular to the vertical direction, and a second slider connection terminal 9a. And the connection part 9c which connects the terminal part 9b for external terminal connection is provided. The second slider connection terminal portion 9a is constituted by a buried portion 9d extending upward from the connection portion 9c and a second slidable portion 9e extending leftward from the buried portion 9d. There is. The buried portion 9 d is housed inside the protruding portion 3 g of the base 3. The first slidable portion 8 e protrudes from the protrusion 3 g of the base 3 to the outside of the base 3.

As shown in FIG. 5, a step parallel to the YZ plane is formed at the center of the lower surface of the second slidable portion 9e in the front-rear direction. Thus, the lower end of the rear surface 9eb of the second slidable portion 9e is lower than the lower end of the front surface 9ea of the second slidable portion 9e. The step formed on the lower surface of the second slidable portion 9e and the step formed on the upper surface of the protrusion 3h are engaged, and the lower surface of the second slidable portion 9e and the upper surface of the protrusion 3h I am in touch.

The front surface 9ea of the second slidable portion 9e and the front surface 3ha of the projecting portion 3h exist on the same plane. Similarly, the rear surface 9eb of the second slidable portion 9e and the rear surface 3hb of the projecting portion 3h exist on the same plane.

The front surface 9ea (first conduction region) of the second slidable portion 9e having conductivity and the front surface 3ha (first insulation region) of the projecting portion 3h having insulation properties are the first normally closed fixed contacts in the switch 1A. It functions as part C1. In the switch 1A, the rear surface 9eb (second conduction region) of the second slidable portion 9e having conductivity and the rear surface 3hb (second insulation region) of the insulating protrusion 3h are normally closed in the switch 1A. It functions as a fixed contact portion C2. The first normally closed fixed contact C1 and the second normally closed fixed contact C2 form a normally closed fixed contact (switching contact) in the switch 1A.

A part of the external terminal connection terminal portion 9b is exposed from the switch 1A through the terminal hole 3ab formed in the side wall 3a of the base 3, and is connected to an external terminal (external circuit) not shown.

The slider 10 is formed by bending a conductive metal plate, and has conductivity. The slider 10 is provided with the connection part 11 and the movable contact parts 12 * 13, as shown to FIG. 2 and FIG. The movable contact portion 12 is formed at the right end of the connecting portion 11, and the movable contact portion 13 is formed at the left end of the connecting portion 11.

As shown in FIG. 3, the movable contact portion 12 includes a first movable contact portion 12a and a second movable contact portion 12b, and the first fixed contact is formed by the first movable contact portion 12a and the second movable contact portion 12b. A clip is configured to sandwich the first slidable portion 8e of the terminal 8 (the above-mentioned common fixed contact portion). The first movable contact portion 12a includes an arm portion 12aa extending downward from the left end of the connecting portion 11, and a contact portion 12ab provided at the tip of the arm portion 12aa and contacting the front surface of the first slidable portion 8e. Have. Similarly, the second movable contact portion 12b is provided at an end of the arm portion 12ba extending downward from the left end of the connecting portion 11 and at the tip of the arm portion 12ba and contacts the rear surface of the first slidable portion 8e. It is equipped with 12bb. The contact portion 12ab and the contact portion 12bb contact the first slidable portion 8e at the same position in the vertical direction.

The movable contact portion 13 includes a first movable contact portion 13a and a second movable contact portion 13b, as shown in FIGS. 3 to 5, and the first movable contact portion 13a and the second movable contact portion 13b The clip which comprises said normally-closed fixed contact part is comprised. The first movable contact portion 13a is an arm portion 13aa extending downward from the right end of the connecting portion 11, and a contact portion provided at the tip of the arm portion 13aa and sliding on the first normally closed fixed contact portion C1 (first Sliding portion) 13ab. Similarly, the second movable contact portion 13b is provided at an end of the arm portion 13ba extending downward from the right end of the connecting portion 11 and at the tip of the arm portion 13ba, and contacts the second normally closed fixed contact portion C2. And (second sliding portion) 13bb. The contact portion 13ab and the contact portion 13bb respectively contact the first normally closed fixed contact portion C1 and the second normally closed fixed contact portion C2 at the same position in the vertical direction.

The connecting portion 10 a is held by the pedestal 4 a of the push button 4. Thus, when the push button 4 is pressed downward, the pedestal 4 a of the push button 4 presses the connecting portion 11 of the slider 10 downward in conjunction with the pressing, and the slider 10 moves downward. .

The coil spring 7 is an elastic body disposed between the base 3 and the slider 10. The upper end of the coil spring 7 is in contact with the connecting portion 11 of the slider 10 in the case 2, and the cylindrical rib 3 d of the base 3 is inserted at the lower end. Thereby, the coil spring 7 biases an upward force to the connection portion 11 of the slider 10.

(Operation of switch 1A)
Next, the operation of the switch 1A in the present embodiment will be described with reference to FIG.

FIG. 6 shows the operation of the switch 1A. In FIG. 6A, the contact portion 13ab contacts the front surface 9ea of the second slidable portion 9e, and the contact portion 13bb is the rear surface of the second slidable portion 9e. 9b is a view showing a state in which the contact portion 13ab is in contact with the front surface 3ha of the projecting portion 3h and the contact portion 13bb is in contact with the rear surface 9eb of the second slidable portion 9e. It is a figure which shows the state which is, and (c) is a figure which shows the state which contact part 13ab contacts front surface 3ha of the protrusion part 3h, and contact part 13bb contacts back surface 3hb of the protrusion part 3h.
<Opening action>
First, the opening operation of the switch 1A will be described.

Before performing the opening operation in the switch 1A, as shown in (a) of FIG. 6, the slider 10 is biased by the coil spring 7, and the slider 10 is in the upper initial position (hereinafter referred to as Also referred to as the first position). In this state, the contact portion 13ab of the first movable contact portion 13a contacts the front surface 9ea of the second slidable portion 9e, and the contact portion 13bb of the second movable contact portion 13b is the second slidable portion 9e. It is in contact with the back surface 9eb. Therefore, the second fixed terminal 9 and the slider 10 are electrically connected, and a state in which the first fixed terminal 8 and the second fixed terminal 9 are energized (that is, the switch 1A is conductive) State).

Next, the pressed portion 4 b of the push button 4 is pressed from the outside. As a result, the slider 10 is pressed by the push button 4 and moves downward against the biasing force of the coil spring 7. When the slider 10 moves downward, as shown in (b) of FIG. 6, in the slider 10, the contact portion 13ab contacts the front surface 3ha of the protrusion 3h, and the front surface 9ea of the second slidable portion 9e Move to a position away from (hereinafter referred to as the second position). Even when the slider 10 moves to the second position, the contact portion 13bb is in contact with the rear surface 9eb of the second slidable portion 9e, so that the distance between the first fixed terminal 8 and the second fixed terminal 9 is It is in an energized state (that is, the switch 1A is in a conducting state).

Next, the pressed portion 4 b of the push button 4 is further pressed. As a result, the slider 10 moves further downward, and as shown in FIG. 6C, in the slider 10, the contact portion 13bb contacts the rear surface 3hb of the protrusion 3h, and the second slidable portion It moves to a position away from the rear surface 9eb of 9e (hereinafter referred to as the third position). When the slider 10 is in the third position, the contact portion 13ab is in contact with the front surface 3ha of the projection 3h, and the contact portion 13bb is in contact with the rear surface 3hb of the projection 3h. As a result, the electrical connection between the second fixed terminal 9 and the slider 10 is cut off, and no current flows between the first fixed terminal 8 and the second fixed terminal 9 (that is, the switch 1A is in the insulated state). ).

Further, when the pressed portion 4b of the push button 4 is pressed, the slider 10 moves further downward. In the meantime, the contact portion 13ab slides on the front surface 3ha of the protrusion 3h, and the contact portion 13bb slides on the rear surface 3hb of the protrusion 3h. Thus, the opening operation of the switch 1A is completed. Thereafter, the position where the push button 4 is fully depressed and the opening operation is completed is set to the fourth position.
<Close operation>
Next, the closing operation of the switch 1A will be described.

Before the closing operation of the switch 1A is performed, the pressed portion 4b of the push button 4 is in a state of being pushed downward (that is, positioned at the fourth position). That is, the contact portion 13ab is in contact with the front surface 3ha of the projection 3h, and the contact portion 13bb is in contact with the rear surface 3hb of the projection 3h, and the gap between the first fixed terminal 8 and the second fixed terminal 9 is It is in the state where it has not energized.

In this state, the pressing force of the push button 4 on the pressed portion 4 b is released. As a result, the downward pressure of the pressed portion 4 b on the slider 10 is released, so the slider 10 moves upward by the biasing force of the coil spring 7.

When the slider 10 moves upward, as shown in (b) of FIG. 6, first, in the slider 10, the contact portion 13bb contacts the rear surface 9eb of the second slidable portion 9e and the protrusion 3h It moves to a position (second position) away from the rear surface 3hb. When the slider 10 moves to the second position, the contact portion 13bb comes in contact with the rear surface 9eb of the second slidable portion 9e, so that an electric conduction state is established between the first fixed terminal 8 and the second fixed terminal 9 (that is, , And the switch 1A becomes conductive.

When the slider 10 further moves upward, the contact portion 13ab contacts the front surface 9ea of the second slidable portion 9e and separates from the front surface 3ha of the protrusion 3h. When the slider 10 further moves upward, as shown in FIG. 6A, the slider 10 moves to the initial position (first position). Thus, the closing operation of the switch 1A is completed.

(Features of switch 1A)
In general, in a switch that opens and closes a large current (e.g., a current of several hundreds of mA or more), an arc discharge occurs at a contact point of the switch when the conduction state and the insulation state are switched. When the arc discharge occurs, the contact point becomes high temperature due to the arc discharge, the terminal melts, and the terminal is consumed.

Therefore, in the switch 1A of the present embodiment, as described above, the slider 10 is pressed by the push button 4 in the first normally closed fixed contact C1, which is the front surface (surface) of the normally closed fixed contact. The front surface 9ea of the second slidable portion 9e and the front surface 3ha of the projecting portion 3h are sequentially arranged in the moving direction from the position (first position). In addition, the second normally closed fixed contact C2, which is the rear surface (rear surface) of the normally closed fixed contact, moves in a direction in which the slider 10 is pressed by the push button 4 and moves from the initial position (first position) The rear surface 9eb of the second slidable portion 9e and the rear surface 3hb of the protrusion 3h are in order. The position of the boundary between the rear surface 9eb of the second slidable portion 9e and the rear surface 3hb of the projecting portion 3h in the moving direction (Z-axis direction) of the slider 10 is the front surface of the second slidable portion 9e. It is below the position of the boundary between 9ea and the front 3ha of the projection 3h. Thereby, while the slider 10 moves, the timing at which the contact portion 13ab reaches the boundary between the front surface 9ea of the second slidable portion 9e and the front surface 3ha of the protrusion 3h, and the contact portion 13bb The timing of reaching the boundary between the rear surface 9eb of the sliding portion 9e and the rear surface 3hb of the projection 3h is different.

With the above configuration, the switching position between the conductive state and the insulating state in the opening operation of the switch 1A is the boundary between the rear surface 9eb of the second slidable portion 9e and the rear surface 3hb of the projection 3h. As a result, in the opening operation of the switch 1A, arc discharge is generated on the side of the second normally closed fixed contact C2 of the normally closed fixed contact.

The position at which the conduction state and the insulation state are switched in the closing operation of the switch 1A is the boundary between the rear surface 9eb of the second slidable portion 9e and the rear surface 3hb of the protrusion 3h. As a result, also in the closing operation of the switch 1A, an arc discharge is generated on the side of the second normally closed fixed contact C2 of the normally closed fixed contact.

As described above, in the switch 1A, arc discharge is generated on the side of the second normally closed fixed contact C2 of the normally closed fixed contact in both the opening operation and the closing operation. That is, when the contact portion 13ab is at a position to switch between conduction and insulation in the first normally closed fixed contact portion C1 (that is, the boundary between the front surface 9ea of the second slidable portion 9e and the front surface 3ha of the projection 3h), The contact portion 13bb is in contact with the rear surface 9eb of the second slidable portion 9e, and the slider 10 and the second fixed terminal 9 have the same potential. Therefore, arc discharge does not occur in the first normally closed fixed contact C1. As a result, the contact portions 13ab of the first normally closed fixed contact portion C1 and the first movable contact portion 13a can be prevented from being consumed by arc discharge. In addition, consumable powder generated by arc discharge can prevent conduction or insulation of the contacts. However, in switch 1A, consumable powder generated due to arc discharge is generated only on the second normally closed fixed contact C2 side, so the consumable powder is on the opposite side to the second normally closed fixed contact C2 side. It is difficult to move to the fixed contact C1 side. Therefore, the switch 1A can be prevented from becoming conduction failure and insulation failure. For this reason, compared with the conventional switch, while being able to open and close high electric current, it can maintain now a conduction | electrical_connection state and an insulation state stably.

Further, the switch 1A realizes a configuration in which no arc discharge is caused in the contact portion 13ab by the one second slidable portion 9e and the one movable contact portion 13 sandwiching the second slidable portion 9e. . Therefore, the switch 1A is a switch with high durability and reliability with a simple configuration.

<Modification 1>
Next, a switch 1B as a modification of the switch 1A of the first embodiment will be described with reference to FIGS. 7 and 8. FIG.

The switch 1B in this modification is a second example of the movable contact portion 14 of the switch 10 in place of the movable contact portion 13 of the slider 10, and a second slidable portion 9e of the second fixed terminal 9 in the switch 1A. The sliding portion 9f is provided with a projection 3i in place of the projection 3h of the base 3 in the switch 1A.

FIG. 7 is a cross-sectional view of the slider 10 and the normally closed fixed contact portion of the switch 1B. As shown in FIG. 7, the upper surface of the protrusion 3i of the base 3 is a flat surface, and the lower surface of the second slidable portion 9f is a flat surface. The upper surface of the projecting portion 3i and the lower surface of the second slidable portion 9f are in contact with each other in a plane perpendicular to the vertical direction (a plane parallel to the XY plane).

The front surface 9fa (first conduction region) of the second slidable portion 9f having conductivity and the front surface 3ia (first insulation region) of the projecting portion 3i having insulation are the first normally closed fixed contacts in the switch 1B. It functions as part C3. In the switch 1B, the rear surface 9fb (second conduction region) of the second slidable portion 9f having conductivity and the rear surface 3ib (second insulation region) of the insulating protrusion 3i are normally closed in the switch 1B. It functions as a fixed contact portion C4. The first normally closed fixed contact C3 and the second normally closed fixed contact C4 constitute a normally closed fixed contact (switching contact) in the switch 1B.

As shown in FIG. 7, the movable contact portion 14 includes a first movable contact portion 14a and a second movable contact portion 14b, and the first movable contact portion 14a and the second movable contact portion 14b described above. A clip for sandwiching the normally closed fixed contact portion is configured. The first movable contact portion 14a includes an arm portion 14aa extending downward from the right end of the connecting portion 11, and a contact portion provided at the tip of the arm portion 14aa and sliding on the first normally closed fixed contact portion C3 (first Sliding portion) 14ab. Similarly, the second movable contact portion 14b is provided at an end of the arm portion 14ba extending downward from the right end of the connecting portion 11 and at the tip of the arm portion 14ba and slides on the second normally closed fixed contact portion C4. And (second sliding portion) 14bb.

In the switch 1B, the length of the arm 14aa of the first movable contact 14a is longer than the length of the arm 14ba of the second movable contact 14b. Thereby, in the vertical direction, the position where the contact portion 14ab slides on the first normally closed fixed contact portion C3 is lower than the position where the contact portion 14bb slides on the second normally closed fixed contact portion C4. .

(Operation of switch 1B)
Next, the operation of the switch 1B in the present modification will be described with reference to FIG.

FIG. 8 shows the operation of the switch 1B. In FIG. 8A, the contact portion 14ab contacts the front surface 9fa of the second slidable portion 9f, and the contact portion 14bb is the back surface of the second slidable portion 9f. 9b is a view showing a state in contact with 9fb, where (b) shows the contact portion 14ab contacting the front surface 3ia of the projecting portion 3i and the contact portion 14bb contacting the rear surface 9fb of the second slidable portion 9f It is a figure which shows the state which is, and (c) is a figure which shows the state which contact part 14ab contacts front surface 3ia of the protrusion part 3i, and contact part 14bb contacts back surface 3ib of the protrusion part 3i.
<Opening action>
First, the opening operation of the switch 1B will be described.

Before the opening operation of the switch 1B is performed, as shown in FIG. 8A, the slider 10 is biased by the coil spring 7 and the slider 10 is positioned at the upper initial position. There is. In this state, the second fixed terminal 9 and the slider 10 are electrically connected, and a state in which the first fixed terminal 8 and the second fixed terminal 9 are energized (ie, switch 1B) Is in the conductive state).

Next, the pressed portion 4 b of the push button 4 is pressed from the outside. As a result, the slider 10 is pressed by the push button 4 and moves downward against the biasing force of the coil spring 7. When the slider 10 moves downward, as shown in (b) of FIG. 8, in the slider 10, the contact portion 14ab of the first movable contact portion 14a contacts the front surface 3ia of the protrusion 3i and the second object It moves to a position (second position) away from the front surface 9fa of the sliding portion 9f. Since the contact portion 14bb of the second movable contact portion 14b is in contact with the rear surface 9fb of the second slidable portion 9f even when the slider 10 moves to the second position, the first fixed terminal 8 and the second fixed terminal 8b It is in a state where current is supplied between the fixed terminal 9 and the fixed terminal 9 (that is, the switch 1B is in a conductive state).

Next, the pressed portion 4 b of the push button 4 is further pressed. Thereby, the slider 10 is further moved downward, and as shown in FIG. 8C, in the slider 10, the contact portion 14bb is in contact with the rear surface 3ib of the projecting portion 3i and the second slidable portion It moves to a position (third position) away from the rear surface 9fb of 9f. When the slider 10 is in the third position, the contact portion 14ab is in contact with the front surface 3ia of the protrusion 3i, and the contact portion 14bb is in contact with the rear surface 3ib of the protrusion 3i. As a result, the electrical connection between the second fixed terminal 9 and the slider 10 is cut off, and no current flows between the first fixed terminal 8 and the second fixed terminal 9 (that is, the switch 1B is in the insulated state). ).

Further, when the pressed portion 4b of the push button 4 is pressed, the slider 10 moves further downward. In the meantime, the contact portion 14ab slides on the front surface 3ia of the protrusion 3i, and the contact portion 14bb slides on the rear surface 3ib of the protrusion 3i. Thus, the opening operation of the switch 1A is completed. Thereafter, the position where the push button 4 is fully depressed and the opening operation is completed is set to the fourth position.
<Close operation>
Next, the closing operation of the switch 1B will be described.

Before the closing operation of the switch 1B is performed, the pressed portion 4b of the push button 4 is in a state of being pushed downward (i.e., positioned at the fourth position). That is, the contact portion 14ab is in contact with the front surface 3ia of the projection 3i, and the contact portion 14bb is in contact with the rear surface 3ib of the projection 3i, and the space between the first fixed terminal 8 and the second fixed terminal 9 is It is in the state where it has not energized.

In this state, the pressing force of the push button 4 on the pressed portion 4 b is released. Thereby, the slider 10 is moved upward by the biasing force of the coil spring 7.

When the slider 10 moves upward, as shown in FIG. 8B, in the slider 10, the contact portion 14bb contacts the rear surface 9fb of the second slidable portion 9f, and the rear surface 3ib of the protrusion 3i Move to a position away from (second position). When the slider 10 moves to the second position, the contact portion 14bb comes in contact with the rear surface 9fb of the second slidable portion 9f, so that an electrical connection is established between the first fixed terminal 8 and the second fixed terminal 9 (that is, , And the switch 1B becomes conductive.

When the slider 10 further moves upward, the contact portion 14ab contacts the front surface 9fa of the second slidable portion 9f and separates from the front surface 3ia of the protrusion 3i. Then, when the slider 10 further moves upward, as shown in (a) of FIG. 8, the slider 10 moves to the initial position (first position). Thus, the closing operation of the switch 1B is completed.

As described above, in the switch 1B, the switching position of the switch 1B between the conductive state and the insulating state in the opening operation and the closing operation is the boundary between the rear surface 9fb of the second slidable portion 9f and the rear surface 3ib of the projection 3i. It becomes. Therefore, in both the opening operation and the closing operation, arc discharge occurs at the second normally closed fixed contact C4 side of the normally closed fixed contact. That is, when the contact portion 14ab is at a position where conduction and insulation in the first normally closed fixed contact portion C3 are switched (that is, the boundary between the front surface 9fa of the second slidable portion 9f and the front surface 3ia of the projection 3i), The contact portion 14bb is in contact with the rear surface 9fb of the second slidable portion 9f, and the slider 10 and the second fixed terminal 9 have the same potential. Therefore, arc discharge does not occur in the first normally closed fixed contact C3. As a result, the contact portions 14ab of the first normally closed fixed contact portion C3 and the first movable contact portion 14a can be prevented from being consumed by arc discharge. Further, consumable powder generated by arc discharge on the second normally closed fixed contact C4 side is hard to move to the first normally closed fixed contact C3 side which is the opposite side of the second normally closed fixed contact C4 side. Therefore, it is possible to prevent the switch 1B conduction failure and insulation failure.

Second Embodiment
Another embodiment of the present invention is described below with reference to FIGS. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended and the description is abbreviate | omitted.

The switch 1C in this embodiment is a projection instead of the second slidable portion 9g of the second fixed terminal 9 of the switch 1A instead of the second slidable portion 9g, and a protrusion 3h of the base 3 of the switch 1A. It has 3j.

FIG. 9 is a front view of the upper portion of the slider 10 and the base 3 b of the base 3 in the switch 1C. FIG. 10 is a cross-sectional view taken along line AA of FIG.

The protrusion 3 j protrudes leftward from the protrusion 3 g in the upper part of the protrusion 3 g as shown in FIG. 9. Further, as shown in FIG. 10, a step parallel to the YZ plane is formed at the center in the front-rear direction of the lower surface of the protrusion 3j.

The second slidable portion 9g is extended leftward from the buried portion 9d, and protrudes upward from the upper portion of the base 3 as shown in FIGS. A step parallel to the YZ plane is formed at the center of the top surface of the second slidable portion 9g in the front-rear direction. The step formed on the upper surface of the second slidable portion 9g and the step formed on the lower surface of the projecting portion 3j are engaged, and the upper surface of the second slidable portion 9g and the upper surface of the projecting portion 3j I am in touch.

As shown in FIG. 10, in the switch 1C, the front surface 9ga (first conduction region) of the second slidable portion 9g having conductivity and the front surface 3ja (first insulation region) of the insulating protrusion 3j are provided. , Functions as the first normally open fixed contact D1. In the switch 1C, the rear surface 9gb (second conduction region) of the second slidable portion 9g having conductivity and the rear surface 3jb (second insulation region) of the projecting portion 3j having insulation are normally open in the switch 1C. It functions as the fixed contact part D2. The first normally open fixed contact D1 and the second normally open fixed contact D2 constitute a normally open fixed contact (switching contact) in the switch 1C.

(Operation of switch 1C)
Next, the operation of the switch 1C in the present embodiment will be described with reference to FIG.

FIG. 11 shows the operation of the switch 1C, where (a) shows a state in which the contact portion 13ab contacts the front surface 3ja of the projection 3j and the contact portion 13bb contacts the rear surface 3jb of the projection 3j. It is a figure which shows, and (b) is a figure which shows the state which contact part 13ab contacts front 9ga of the 2nd sliding part 9g, and contact part 13bb contacts back 3jb of projection part 3j, (C) is a figure which shows the state which contact part 13ab contacts front surface 9ga of the 2nd sliding part 9g, and contact part 13bb contacts back surface 9gb of the 2nd sliding part 9g.
<Close operation>
First, the closing operation of the switch 1C will be described.

Before performing the closing operation in the switch 1C, as shown in (a) of FIG. 11, the slider 10 is biased by the coil spring 7, and the slider 10 is in the upper initial position (hereinafter referred to as Also referred to as the first position). In this state, the contact portion 13ab of the first movable contact portion 13a contacts the front surface 3ja of the projecting portion 3j, and the contact portion 13bb of the second movable contact portion 13b contacts the rear surface 3jb of the projecting portion 3j. For this reason, the second fixed terminal 9 and the slider 10 are electrically disconnected, and no current flows between the first fixed terminal 8 and the second fixed terminal 9 (that is, the switch 1C is insulated). State).

Next, the pressed portion 4 b of the push button 4 is pressed from the outside. As a result, the slider 10 is pressed by the push button 4 and moves downward against the biasing force of the coil spring 7. When the slider 10 moves downward, as shown in FIG. 11B, in the slider 10, the contact portion 13ab contacts the front surface 9ga of the second slidable portion 9g, and the front surface 3ja of the projection 3j Move to a position away from (hereinafter referred to as the second position). When the slider 10 moves to the second position, the contact portion 13ab contacts the front surface 9ga of the second slidable portion 9g, so the second fixed terminal 9 and the slider 10 are electrically connected. As a result, a state is established in which the first fixed terminal 8 and the second fixed terminal 9 are energized (that is, the switch 1C is in the energized state).

Next, the pressed portion 4 b of the push button 4 is further pressed. Thereby, the slider 10 is further moved downward, and as shown in (c) of FIG. 11, the slider 10 contacts the rear surface 9gb of the second slidable portion 9g with the contact portion 13bb being a projection. It moves to a position away from the rear surface 3jb of 3j (hereinafter referred to as the third position).

Further, when the pressed portion 4b of the push button 4 is pressed, the slider 10 moves further downward. In the meantime, the contact portion 13ab slides on the front surface 9ga of the second slidable portion 9g, and the contact portion 13bb slides on the rear surface 9gb of the second slidable portion 9g. Thus, the closing operation of the switch 1C is completed. Thereafter, the position where the push button 4 is fully depressed and the closing operation is completed is set to the fourth position.
<Opening action>
Next, the opening operation of the switch 1C will be described.

Before the opening operation of the switch 1C is performed, the pressed portion 4b of the push button 4 is in a state of being pushed downward (that is, located at the fourth position). That is, the contact portion 13ab is in contact with the front surface 9ga of the second slidable portion 9g, and the contact portion 13bb is in contact with the rear surface 9gb of the second slidable portion 9g. And the second fixed terminal 9 are energized.

When the slider 10 moves upward, as shown in (b) of FIG. 11, first, in the slider 10, the contact portion 13bb contacts the rear surface 3jb of the protrusion 3j, and the second slidable portion 9g It moves to a position (second position) away from the rear surface 9gb. Since the contact portion 13ab is in contact with the front surface 9ga of the second slidable portion 9g even when the slider 10 moves to the second position, the distance between the first fixed terminal 8 and the second fixed terminal 9 is It is in an energized state (that is, the switch 1A is in a conducting state).

When the slider 10 further moves upward, the contact portion 13ab contacts the front surface 3ja of the protrusion 3j and separates from the front surface 9ga of the second slidable portion 9g. As a result, the contact portion 13ab contacts the front surface 3ja of the projection 3j, and the contact portion 13bb contacts the rear surface 3jb of the projection 3j, so that the second fixed terminal 9 and the slider 10 are electrically connected. The connection is cut off, and no current flows between the first fixed terminal 8 and the second fixed terminal 9 (that is, the switch 1C is in the insulating state).

When the slider 10 further moves upward, as shown in FIG. 11A, the slider 10 moves to the initial position (first position). Thus, the opening operation of the switch 1C is completed.

(Features of switch 1C)
In the switch 1C of the present embodiment, as described above, the slider 10 is pressed by the push button 4 in the first normally open fixed contact portion D1, which is the front surface (surface) of the normally open fixed contact portion. The front surface 3ja of the protrusion 3j and the front surface 9ga of the second slidable portion 9g are sequentially arranged in the moving direction from the first position). In addition, the second normally open fixed contact D2, which is the rear surface (rear surface) of the normally open fixed contact, moves in a direction in which the slider 10 is pressed by the push button 4 and moves from the initial position (first position) The rear surface 3 j b of the protrusion 3 j and the rear surface 9 gb of the second slidable portion 9 g are in order. The position of the boundary between the rear surface 9gb of the second slidable portion 9g and the rear surface 3jb of the protrusion 3j in the moving direction of the slider 10 (Z-axis direction) is the front surface of the second slidable portion 9g. It is below the position of the boundary of 9ga and front 3ja of projection 3j.

With the above configuration, in the switch 1C, in both the opening operation and the closing operation, the positions at which the conduction state and the insulation state of the switch 1C are switched are the front surface 9ga of the second slidable portion 9g and the front surface 3ja of the projection 3j. It becomes the boundary of As a result, in both the opening operation and the closing operation of the switch 1C, an arc discharge is generated on the side of the first normally open fixed contact portion D1 of the normally open fixed contact portion. That is, when the contact portion 13bb is at a position where conduction and insulation in the second normally open fixed contact portion D2 are switched (that is, the boundary between the rear surface 9gb of the second slidable portion 9g and the rear surface 3jb of the projection 3j), The contact portion 13ab is in contact with the front surface 9ga of the second slidable portion 9g, and the slider 10 and the second fixed terminal 9 have the same potential. Therefore, no arc discharge occurs in the second normally open fixed contact portion D2. As a result, the contact portions 13bb of the second normally open fixed contact portion D2 and the second movable contact portion 13b can be prevented from being consumed by arc discharge. Further, in the switch 1C, since expendable powder generated by arc discharge is generated only on the first normally open fixed contact portion D1, the expendable powder is on the opposite side of the first normally open fixed contact portion D1. It is difficult to move to the fixed contact D2 side. Therefore, it is possible to prevent the switch 1C from becoming conduction failure and insulation failure.

<Modification 2>
Next, a switch 1D as a modification of the switch 1C of the second embodiment will be described with reference to FIGS. 12 and 13. FIG.

In the switch 1D of this modification, the movable contact portion 14 of the switch 10 in the switch 1C is replaced with the movable contact portion 14 and the second slidable portion 9h is replaced with the second slidable portion 9g of the switch 1C. The protrusion 3k is provided instead of the protrusion 3j of the base 3 in the switch 1C.

FIG. 12 is a cross-sectional view of the slider 10 and the normally open fixed contact portion of the switch 1D.

As shown in FIG. 12, the lower surface of the protrusion 3k of the base 3 is a flat surface, and the upper surface of the second slidable portion 9h is a flat surface. The lower surface of the protruding portion 3k and the upper surface of the second slidable portion 9h are in contact with each other in a plane perpendicular to the vertical direction (a plane parallel to the XY plane).

The front surface 9ha (first conductive region) of the second slidable portion 9h having conductivity and the front surface 3ka (first insulating region) of the projecting portion 3k having insulating properties are the first normally fixed fixed contacts in the switch 1D. It functions as part D3. In the switch 1B, the rear surface 9hb (second conductive region) of the second slidable portion 9h having conductivity and the rear surface 3kb (second insulating region) of the projecting portion 3k having insulating properties are the second normally open portions in the switch 1B. It functions as the fixed contact portion D4. The first normally open fixed contact D3 and the second normally open fixed contact D4 constitute a normally open fixed contact (opening / closing contact) in the switch 1D.

(Operation of switch 1D)
Next, the operation of the switch 1D in the present modification will be described with reference to FIG.

FIG. 13 shows the operation of the switch 1D, where (a) shows a state in which the contact portion 14ab contacts the front surface 3ka of the projection 3k and the contact portion 14bb contacts the rear surface 3kb of the projection 3k. It is a figure which shows, and (b) is a figure which shows the state which contact part 14ab contacts front 9ha of the 2nd sliding part 9h, and contact part 14bb contacts back 3kb of projection part 3k, (C) is a figure which shows the state which contact part 14ab contacts front surface 9ha of the 2nd sliding part 9h, and contact part 14bb contacts back surface 9hb of the 2nd sliding part 9h.
<Close operation>
First, the closing operation of the switch 1D will be described.

Before performing the closing operation in the switch 1D, as shown in (a) of FIG. 13, the slider 10 is biased by the coil spring 7, and the slider 10 is in the upper initial position (hereinafter referred to as Also referred to as the first position). In this state, the contact portion 14ab of the first movable contact portion 14a contacts the front surface 3ka of the projection 3k, and the contact portion 14bb of the second movable contact portion 14b contacts the rear surface 3kb of the projection 3k. For this reason, the second fixed terminal 9 and the slider 10 are electrically disconnected, and no current flows between the first fixed terminal 8 and the second fixed terminal 9 (that is, the switch 1D is insulated). State).

Next, the pressed portion 4 b of the push button 4 is pressed from the outside. As a result, the slider 10 is pressed by the push button 4 and moves downward against the biasing force of the coil spring 7. When the slider 10 moves downward, as shown in (b) of FIG. 13, in the slider 10, the contact portion 14ab contacts the front surface 9ha of the second slidable portion 9h, and the front surface 3ka of the protrusion 3k Move to a position away from (hereinafter referred to as the second position). When the slider 10 moves to the second position, the contact portion 14ab contacts the front surface 9ha of the second slidable portion 9h, so the second fixed terminal 9 and the slider 10 are electrically connected. As a result, a state is established in which the first fixed terminal 8 and the second fixed terminal 9 are energized (that is, the switch 1D is in the energized state).

Next, the pressed portion 4 b of the push button 4 is further pressed. Thereby, the slider 10 moves further downward, and as shown in (c) of FIG. 13, in the slider 10, the contact portion 14bb contacts the rear surface 9hb of the second slidable portion 9h and the projection portion It moves to a position away from the rear surface 3 kb of 3 k (hereinafter referred to as the third position).

Further, when the pressed portion 4b of the push button 4 is pressed, the slider 10 moves further downward. In the meantime, the contact portion 14ab slides on the front surface 9ha of the second slidable portion 9h, and the contact portion 14bb slides on the rear surface 9hb of the second slidable portion 9h. Thus, the closing operation of the switch 1D is completed. Thereafter, the position where the push button 4 is fully depressed and the closing operation is completed is set to the fourth position.
<Opening action>
Next, the opening operation of the switch 1D will be described.

Before the opening operation of the switch 1D is performed, the pressed portion 4b of the push button 4 is in a state of being pushed downward (that is, located at the fourth position). That is, the contact portion 14ab is in contact with the front surface 9ha of the second slidable portion 9h, and the contact portion 14bb is in contact with the rear surface 9hb of the second slidable portion 9h. And the second fixed terminal 9 are energized.

When the slider 10 moves upward, as shown in (b) of FIG. 13, first, in the slider 10, the contact portion 14bb contacts the rear surface 3kb of the protrusion 3k, and the second slidable portion 9h It moves to a position (second position) away from the rear surface 9hb. Even if the slider 10 moves to the second position, the contact portion 14ab is in contact with the front surface 9ha of the second slidable portion 9h, so that the distance between the first fixed terminal 8 and the second fixed terminal 9 is It is in an energized state (that is, the switch 1A is in a conducting state).

When the slider 10 further moves upward, the contact portion 14ab contacts the front surface 3ka of the protrusion 3k and separates from the front surface 9ha of the second slidable portion 9h. As a result, the contact portion 14ab contacts the front surface 3ka of the protrusion 3k, and the contact portion 14bb contacts the rear surface 3kb of the protrusion 3k, so that the second fixed terminal 9 and the slider 10 are electrically connected. The connection is cut off, and no current flows between the first fixed terminal 8 and the second fixed terminal 9 (that is, the switch 1D is in the insulating state).

When the slider 10 further moves upward, as shown in FIG. 13A, the slider 10 moves to the initial position (first position). Thus, the opening operation of the switch 1D is completed.

As described above, in the switch 1D, in the opening operation and the closing operation, the switching position of the switch 1D between the conduction state and the insulation state is the boundary between the front surface 9ha of the second slidable portion 9h and the front surface 3ka of the projection 3k. It becomes. Therefore, in both the opening operation and the closing operation, arc discharge occurs on the side of the first normally open fixed contact D3 of the normally open fixed contact. That is, when the contact portion 14bb is at a position where conduction and insulation in the second normally open fixed contact portion D4 are switched (that is, the boundary between the rear surface 9hb of the second slidable portion 9h and the rear surface 3kb of the projection 3k), The contact portion 14ab is in contact with the front surface 9ha of the second slidable portion 9h, and the slider 10 and the second fixed terminal 9 have the same potential. Therefore, no arc discharge occurs in the second normally open fixed contact D4. As a result, the contact portions 14bb of the second normally open fixed contact portion D4 and the second movable contact portion 14b can be prevented from being consumed by arc discharge. Further, consumable powder generated by arc discharge on the first normally open fixed contact D3 side is hard to move to the second normally open fixed contact D4 side which is the opposite side of the first normally open fixed contact D3. Therefore, the switch 1D can be prevented from becoming conduction failure and insulation failure.

Third Embodiment
Another embodiment of the present invention is described below with reference to FIG. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended and the description is abbreviate | omitted.

FIG. 14 is a cross-sectional view of the slider 10 and the normally open fixed contact portion of the switch 1E in a state in which the slider 10 is not pressed by the push button 4.

As shown in FIG. 14, the switch 1 </ b> E includes a protrusion 3 m instead of the protrusion 3 j of the switch 1 </ b> C in the second embodiment.

A front surface 9 ga (first conduction region) of the second slidable portion 9 g having conductivity and a front surface 3 ma (first insulation region) of the projecting portion 3 m having insulation are the first always-opened fixed contacts in the switch 1E. It functions as part D1. In the switch 1E, the back surface 9gb (second conduction region) of the second slidable portion 9g having conductivity and the back surface 3mb (second insulation region) of the projecting portion 3m having insulation are normally open in the switch 1E. It functions as the fixed contact part D2. The first normally open fixed contact D1 and the second normally open fixed contact D2 constitute a normally open fixed contact (switching contact) in the switch 1E.

In the switch 1E, as shown in FIG. 14, when the slider 10 is at a position (initial position) where the slider 10 is not pressed by the push button 4, the slider 10 is separated from the protrusion 3m . Thereby, the insulation of switch 1E in the state where slider 10 is in an initial position can be improved.

Further, in the switch 1E, the distance between the front surface 3ma and the rear surface 3mb decreases at the top of the protrusion 3m as the slider 10 moves from the initial position in the opposite direction (that is, upward direction) to the movement direction. It has a shape. As a result, when the slider 10 is pressed by the push button 4 and moves downward from the initial state, the contact portion 13ab and the contact portion 13bb can smoothly sandwich the protrusion 3m.

Embodiment 4
Another embodiment of the present invention is described below with reference to FIG. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended and the description is abbreviate | omitted.

The switch 1F in the present embodiment includes a movable contact portion 15 instead of the movable contact portion 13 in the first embodiment.

FIG. 15 is a front view of the upper portion of the slider 10 and the base 3 b of the base 3 in the switch 1F.

The movable contact portion 15 includes a first movable contact portion 15a. The first movable contact portion 15a is provided at an end of an arm portion 15aa extending downward from the left end of the connecting portion 11 and at the tip of the arm portion 15aa, and two contact portions contacting the front surface 9ea of the second slidable portion 9e (1st sliding part) 15ab * 15ac is provided. The contact portions 15ab and 15ac are formed apart from each other in the left-right direction.

With the above configuration, in the switch 1F, the movable contact portion 15 can contact the front surface 9ea of the second slidable portion 9e at two points, the contact portion 15ab and the contact portion 15ac. Thereby, for example, between the contact portion 15ab and the front surface 9ea of the second slidable portion 9e due to the presence of foreign matter between the contact portion 15ab and the front surface 9ea of the second slidable portion 9e. Even when the electrical connection can not be made, the electrical connection can be made between the contact portion 15ac and the front surface 9ea of the second slidable portion 9e. Therefore, the reliability of the contact between the movable contact portion 15 and the front surface 9ea of the second slidable portion 9e can be improved. As a result, the reliability of the switch 1F can be improved.

Although not shown, the movable contact portion 15 has a configuration in which the second movable contact portion includes two contact portions.

In addition, in this embodiment, although the 1st movable contact part 15a was a structure provided with two contact part 15ab * 15ac, it is not restricted to this. That is, the first movable contact portion 15a may have three or more contact portions.

[Summary]
A switch according to an aspect of the present invention is a switch including: an open / close contact portion; an operation member; and a movable contact portion which moves by being operated by the operation member and sandwiches the open / close contact portion. The on / off contact portion is formed along the movement direction of the movable contact portion, and the second conduction is formed along the movement direction, and a surface including the first conduction region and the first insulation region. The movable contact portion includes a first sliding portion sliding on the front surface, and a second sliding portion sliding on the rear surface. A timing at which the first sliding portion reaches a boundary between the first conduction region and the first insulating region while the movable contact portion moves, and the second sliding portion performs the second conduction region Reaching the boundary between the two and the second insulation region It is different from the ring.

According to the above configuration, arcing occurs on only one of the front surface and the back surface in both the opening operation and the closing operation of the switch. As a result, in both of the opening operation and the closing operation of the switch, arc discharge does not occur on one of the front surface and the back surface, so that it can be prevented from being consumed by arc discharge.

In addition, consumable powder generated by arc discharge can prevent conduction or insulation of the contacts. However, since expendable powder generated by arc discharge is generated on only one of the front surface or the back surface, the expendable powder is less likely to move to the opposite surface or the back surface. Therefore, it is possible to prevent the switch from becoming conduction failure and insulation failure. For this reason, compared with the conventional switch, while being able to open and close high electric current, it can maintain now a conduction | electrical_connection state and an insulation state stably. Therefore, a switch with high durability and reliability can be realized.

In the switch according to one aspect of the present invention, the position of the boundary between the first conduction region and the first insulation region, and the position of the boundary between the second conduction region and the second insulation region in the movement direction May be different.

In the switch according to one aspect of the present invention, in the movement direction, the position where the first sliding portion slides on the surface is different from the position where the second sliding portion slides on the back surface. It may be a configuration.

In the switch according to one aspect of the present invention, a first conduction region and a first insulation region are formed on the surface in order from the initial position toward the direction in which the movable contact portion is operated by the operation member. And the second conductive region and the second insulating region are formed on the back surface in the direction in which the movable contact portion is moved by the operation member and moved from the initial position. Good.

According to the above configuration, the movable contact portion can be moved from the initial position by the operation member, whereby the switch can be switched from the closed state to the open state.

In the switch according to one aspect of the present invention, a first insulating region and a first conduction region are formed on the surface in order from the initial position toward the direction in which the movable contact portion is operated by the operation member. And the second insulating area and the second conduction area are formed on the back surface in the direction in which the movable contact portion is moved by the operation member and moved from the initial position. Good.

According to the above configuration, the switch can be switched from the open state to the closed state by moving the movable contact portion from the initial position by the operation member.

In the switch according to one aspect of the present invention, preferably, the movable contact portions are configured to contact the surface at a plurality of points separated from each other.

According to said structure, since a 1st sliding part contacts the surface in several places, the reliability of a contact with a 1st slider and a surface can be improved.

In the switch according to one aspect of the present invention, the movable contact portion may be configured to deviate from the surface at the initial position.

According to the above configuration, the insulation of the switch can be improved.

In the switch according to one aspect of the present invention, the on / off contact portion has a shape in which the distance between the front surface and the back surface decreases as the movable contact portion moves in the direction opposite to the direction of movement from the initial position. It is preferable that

According to the above configuration, when moving the movable contact part separated from the open / close contact part, the movable contact part can smoothly sandwich the open / close contact part.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.

1A to 1F switch 3ha, 3ia, 3ja, 3ka, 3ma front (first insulation area)
3hb, 3ib, 3jb, 3kb, 3mb Rear surface (second insulating region)
4 Push button (operation member)
9ea, 9fa, 9ga, 9ha Front (first conduction area)
9eb, 9fb, 9gb, 9hb Rear surface (second conduction region)
13 to 15 Movable contact portion 13ab, 14ab, 15ab, 15ac Contact portion (first sliding portion)
13bb, 14bb contact part (second sliding part)
C1, C3 1st normally closed fixed contact part (switching contact part, surface)
C2, C4 Second normally closed fixed contact point (switching point, back)
D1, D3 1st normally open fixed contact point (switching point, surface)
D2, D4 2nd normally open fixed contact point (switching point, back)

Claims

Switching contacts,
Operation member,
A switch comprising: a movable contact portion which is moved by being operated by the operation member and which sandwiches the switching contact portion;
The switching contact portion is
A surface provided with a first conduction region and a first insulation region, which are formed side by side along the moving direction of the movable contact portion;
And a back surface including a second conduction region and a second insulation region, which are formed side by side along the moving direction,
The movable contact portion includes a first sliding portion sliding on the surface, and a second sliding portion sliding on the back surface,
The timing at which the first sliding portion reaches the boundary between the first conduction region and the first insulating region while the movable contact portion is moving, and the second sliding region is the second conduction region. A switch characterized in that the timing at which the boundary with the second insulating region is reached is different.
The position of the boundary between the first conduction region and the first insulation region is different from the position of the boundary between the second conduction region and the second insulation region in the movement direction. Item 1. The switch according to item 1.
The position in which the said 1st sliding part slides on the said surface in the said movement direction differs from the position in which the said 2nd sliding part slides on the said back surface, It is characterized by the above-mentioned. Switch.
On the surface, a first conduction region and a first insulation region are formed in order from the initial position toward the direction in which the movable contact portion is operated by the operation member and moved from the initial position,
The second conductive region and the second insulating region are formed on the back surface in order from the initial position toward the direction in which the movable contact portion is operated by the operation member and moved from the initial position. The switch according to any one of to 3.
A first insulating region and a first conduction region are formed on the surface in the direction in which the movable contact portion is moved by the operation member and moved from an initial position.
A second insulating region and a second conduction region are formed on the back surface in order from the initial position toward the direction in which the movable contact portion is operated by the operation member and moved from the initial position. The switch according to any one of to 3.
The switch according to any one of claims 1 to 5, wherein the movable contact portion contacts the surface at a plurality of points separated from each other.
The switch according to claim 5, wherein the movable contact portion deviates from the surface at the initial position.
The switching contact portion is characterized in that the distance between the front surface and the back surface decreases as the movable contact portion moves in the direction opposite to the direction in which the movable contact portion moves from the initial position. Item 7. The switch according to item 7.