JP2018107025A - switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch with high durability and reliability, which solves a problem in which an arc is generated and consumed between a sliding contact and a fixed contact when a large current with the sliding contact and the fixed contact is opened and closed.SOLUTION: In a switch according to the present invention, during movement of a movable contact part, timing at which a contact part 13ab of the movable contact part reaches a boundary between a front surface 3ha and a front surface 9ea of a fixed contact part is different from timing at which a contact part 13bb of the movable contact part reaches a boundary between a rear surface 3hb and a rear surface 9eb of the fixed contact part.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a switch for opening and closing a current.

  Conventionally, a switch that switches between an open state and a closed state of a circuit by performing a pressing operation is known. Such a switch includes a normally closed fixed contact (or a normally open fixed contact) having a conductive region and an insulating region. 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 region to the insulating region (or from the insulating region to the conductive region).

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

  A switch device that solves this problem is disclosed in Patent Document 1. In the switch device disclosed in Patent Literature 1, the first contact portion that slides with the common fixed contact as the drive member moves up and down, the second contact portion and the third contact portion of the individual fixed contact, A movable contact formed with a second contact portion and a third contact portion that are in contact with each other is provided. When the movable contact is moved, the second contact portion comes into contact with the individual fixed contact earlier than the third contact portion. It has a configuration. Thus, the second contact portion and the second contact portion are prevented from being consumed by arc discharge, and the life of the contact can be extended.

JP 2005-158636 A (released on June 16, 2005)

  However, in the switch device disclosed in Patent Document 1, since the second contact portion and the third contact portion are arranged on the same plane, the consumable powder generated in the contact portion where arc discharge occurs is Easy to move to other contact points. There is a problem that the expendable powder that has moved to another contact portion causes a conduction failure and an insulation failure in the other contact portion.

  An object of one embodiment of the present invention is to realize a switch with high durability and reliability.

  In order to solve the above-described problem, a switch according to one aspect of the present invention moves 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 The switch contact portion is formed in a line along the moving direction of the movable contact portion, the surface including the first conduction region and the first insulating region, and along the moving direction. The movable contact portion includes a first sliding portion that slides on the front surface and a first sliding portion that slides on the rear surface. Two sliding portions, and while the movable contact portion moves, the timing at which the first sliding portion reaches the boundary between the first conductive region and the first insulating region, and the second The sliding portion is connected to the second conduction region and the second And when reaching the boundary between the edge region are different.

  According to the above configuration, arc discharge occurs only on 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 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 is possible to prevent consumption due to arc discharge.

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

  The switch according to one aspect of the present invention includes a position of a boundary between the first conduction region and the first insulation region, and a position of a boundary between the second conduction region and the second insulation region in the movement direction. May be configured differently.

  In the switch according to one aspect of the present invention, a position where the first sliding portion slides on the front surface and a position where the second sliding portion slides on the back surface are different in the moving direction. 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 in a direction in which the movable contact portion is operated by the operation member and moves from an initial position. And the second contact region and the second insulation region are formed on the back surface in order in the direction in which the movable contact portion is operated by the operation member and moves from the initial position. Good.

  According to said structure, it can be set as the switch switched from a closed state to an open state by moving a movable contact part from an initial position with an operation member.

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

  According to said structure, it can be set as the switch switched from an open state to a closed state by moving a movable contact part from an initial position with an operation member.

  The switch which concerns on 1 aspect of this invention WHEREIN: It is preferable that the said movable contact part is the structure which contacts the said surface in the several location away from each other.

  According to said structure, since a 1st sliding part contacts the surface in a several location, 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 said structure, the insulation of a switch can be improved.

  The switch which concerns on 1 aspect of this invention WHEREIN: The said switching contact part becomes a shape where the distance between the said surface and the said back surface becomes small as it goes to the reverse direction to the direction where the said movable contact part moves from the said initial position. It is preferable that

  According to said structure, when moving the movable contact part which has deviated from the opening-and-closing contact part, a movable contact part can pinch an opening-and-closing contact part smoothly.

  According to one embodiment of the present invention, a switch with high durability and high 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 a disassembled perspective view which shows the structure of the said switch. It is a perspective view of the upper part of the base part of a slider and a base in the said switch. It is a front view of the upper part of the base part of a slider and a base in the said switch. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. The operation of the switch is shown, (a) is a diagram showing a state where 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 in which one contact part is contacting the 1st insulation area | region, and the other contact part is contacting the 2nd conduction | electrical_connection area, (c) is a figure where one contact part is contacting 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 a switch as a modification of the said switch, and a normally closed fixed contact part. The operation of the switch is shown, (a) is a diagram showing a state where 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 in which one contact part is contacting the 1st insulation area | region, and the other contact part is contacting the 2nd conduction | electrical_connection area, (c) is a figure where one contact part is contacting 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 part 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 in FIG. 9. The operation of the switch is shown, (a) is a diagram showing a state where 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 in which one contact part is contacting the 1st conduction | electrical_connection area, and the other contact part is contacting the 2nd insulation area | region, (c) is a figure where one contact part is It is a figure which shows the state which is contacting the 1st conduction | electrical_connection area and the other contact part is contacting the 2nd conduction | electrical_connection area. It is sectional drawing of the slider of a switch as a modification of the said switch, and a normally open fixed contact part. The operation of the switch is shown, (a) is a diagram showing a state where 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 in which one contact part is contacting the 1st conduction | electrical_connection area, and the other contact part is contacting the 2nd insulation area | region, (c) is a figure where one contact part is It is a figure which shows the state which is contacting the 1st conduction | electrical_connection area and the other contact part is contacting the 2nd conduction | electrical_connection area. It is sectional drawing of a slider and a normally open fixed contact part in the state which is not pressed by the pushbutton in the switch concerning Embodiment 3 of this invention. It is a front view of the upper part of the base part 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.

  FIG. 1 is a perspective view showing the external 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, the −x direction as the backward direction, the + y direction as the right direction, the −y direction as the left direction, the + z direction as the upward direction, and the −z direction as the downward direction.

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

  The case 2 includes a substantially rectangular parallelepiped first member 2a and a second member 2b protruding rightward from the side surface 2c of the first member 2a. The case 2 constitutes the casing of the switch 1A together with the side wall 3a of the base 3 described later.

  As shown in FIG. 2, the first member 2a has a cavity formed therein, and an opening 2d is formed on the surface facing the side surface 2c. On the upper surface of the first member 2a, an insertion hole 2e into which a push button 4 described later is inserted, 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 recessed part 2g is formed.

  The second member 2b is formed with a mounting hole 2h for mounting the switch 1A to a device on which the switch 1A is mounted. An annular protrusion 2i is provided on the front surface of the first member 2a for defining the mounting position of the switch 1A with respect to the device.

  As shown in FIG. 2, the base 3 includes a side wall 3a and a base 3b. The base 3 is made of resin and has an insulating property.

  The side wall 3a has a flat plate shape, and constitutes the casing of the switch 1A together with the case 2 by closing the opening 2d of the case 2. Two terminal holes 3aa and 3ab arranged in the vertical direction are formed in the lower portion of the side wall 3a.

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

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

  5 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 5, a step is formed on the upper surface of the protrusion 3h. Thereby, the upper end of the front surface 3ha of the protrusion 3h is positioned higher than the upper end of the rear surface 3hb of the protrusion 3h. Although not shown, the upper surface of the projecting portion 3f has no step and is a flat surface.

  The push button 4 includes a pedestal 4a in which a concave portion is formed, and a columnar pressed portion 4b extending upward from the pedestal 4a. The pressed part 4b 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 an insertion hole 2 e of the case 2 and a through hole formed in the rubber cap 5. The push button 4 can move in the vertical direction by pressing the pressed portion 4b from the outside by a lever or the like.

  The 1st fixed terminal 8 is formed with the metal, and has electroconductivity. The first fixed terminal 8 includes a first slider connection terminal portion 8a extending in the vertical direction, an external terminal connection terminal portion 8b having a surface perpendicular to the vertical direction, and a first slider connection terminal portion 8a. And a connecting portion 8c for connecting the external terminal connecting terminal portion 8b.

  The first slider connection terminal portion 8a includes an embedded portion 8d extending upward from the connection portion 8c and a first sliding portion 8e extending rightward from the embedded portion 8d. Yes. The embedded portion 8 d is embedded in the protruding portion 3 e of the base 3. The first sliding portion 8 e protrudes from the protruding 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 protruding portion 3 f of the base 3. The front surface of the first sliding portion 8e and the front surface of the protruding portion 3h exist on the same plane. Similarly, the rear surface of the first sliding portion 8e and the rear surface of the protruding portion 3h are on the same plane.

  The first sliding portion 8e of the first fixed terminal 8 is in contact with the contact portion 12ab and the contact portion 12ab of the slider 10 to be described later until the push button 4 is completely pressed from the state where the push button 4 is not pressed. The portion 12bb extends in the up-down direction so as to be able to contact the front surface and the rear surface of the first sliding portion 8e, respectively. Thereby, the slider 10 and the first fixed terminal 8 are always in an electrically connected state. That is, the front surface and the rear surface of the first sliding portion 8e function as a common fixed contact portion in the switch 1A.

  Part of the external terminal connection terminal portion 8b is exposed from the switch 1A through a 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 portion 9a extending in the vertical direction, an external terminal connection terminal portion 9b having a surface perpendicular to the vertical direction, and a second slider connection terminal portion 9a. And a connecting portion 9c for connecting the external terminal connecting terminal portion 9b. The second slider connection terminal portion 9a is composed of an embedded portion 9d extending upward from the connection portion 9c and a second sliding portion 9e extending from the embedded portion 9d toward the left. Yes. The embedded portion 9 d is housed inside the protruding portion 3 g of the base 3. The first sliding portion 8 e protrudes from the protruding portion 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 in the front-rear direction of the lower surface of the second sliding portion 9e. Thereby, the lower end of the rear surface 9eb of the second sliding portion 9e is lower than the lower end of the front surface 9ea of the second sliding 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 protruding portion 3h are engaged so that the lower surface of the second slidable portion 9e and the upper surface of the protruding portion 3h are in contact with each other. It touches.

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

  The front surface 9ea (first conduction region) of the second sliding portion 9e having conductivity and the front surface 3ha (first insulation region) of the projecting portion 3h having insulation are the first normally closed fixed contact in the switch 1A. It functions as part C1. In addition, the rear surface 9eb (second conductive region) of the second sliding portion 9e having conductivity and the rear surface 3hb (second insulating region) of the projecting portion 3h having insulating properties are second normally closed in the switch 1A. It functions as the fixed contact portion C2. The first normally closed fixed contact portion C1 and the second normally closed fixed contact portion C2 constitute a normally closed fixed contact portion (open / close contact portion) in the switch 1A.

  A part of the terminal portion 9b for external terminal connection is exposed from the switch 1A through a 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. As shown in FIGS. 2 and 3, the slider 10 includes a connecting portion 11 and movable contact portions 12 and 13. A movable contact portion 12 is formed at the right end of the connecting portion 11, and a 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. The first fixed contact is made by the first movable contact portion 12a and the second movable contact portion 12b. A clip that sandwiches the first sliding portion 8e (the above-mentioned common fixed contact portion) of the terminal 8 is configured. 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 sliding portion 8e. I have. Similarly, the second movable contact portion 12b includes an arm portion 12ba extending downward from the left end of the connecting portion 11, and a contact portion that is provided at the tip of the arm portion 12ba and contacts the rear surface of the first sliding portion 8e. 12bb. The contact portion 12ab and the contact portion 12bb are in contact with the first sliding portion 8e at the same position in the vertical direction.

  As shown in FIGS. 3 to 5, the movable contact portion 13 includes a first movable contact portion 13a and a second movable contact portion 13b, and the first movable contact portion 13a and the second movable contact portion 13b A clip sandwiching the normally closed fixed contact portion is configured. The first movable contact portion 13a is provided at an arm portion 13aa extending downward from the right end of the connecting portion 11 and a tip portion of the arm portion 13aa, and a contact portion (first portion) that slides on the first normally closed fixed contact portion C1. Sliding portion) 13ab. Similarly, the second movable contact portion 13b includes an arm portion 13ba that extends downward from the right end of the connecting portion 11, and a contact portion that is provided at the tip of the arm portion 13ba and that slides on the second normally closed fixed contact portion C2. (Second sliding portion) 13bb. The contact part 13ab and the contact part 13bb are in contact with the first normally closed fixed contact part C1 and the second normally closed fixed contact part C2, respectively, at the same position in the vertical direction.

  The connecting portion 10 a is held on the pedestal 4 a of the push button 4. Accordingly, when the push button 4 is pressed downward, the base 4a of the push button 4 presses the connecting portion 11 of the slider 10 in conjunction with the press, and the slider 10 moves downward. .

  The coil spring 7 is an elastic body arranged between the base 3 and the slider 10. In the case 2, the upper end of the coil spring 7 is in contact with the connecting portion 11 of the slider 10, 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 against the connecting 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. FIG. 6A shows the contact portion 13ab in contact with the front surface 9ea of the second sliding portion 9e and the contact portion 13bb in the rear surface of the second sliding portion 9e. It is a figure which shows the state which is contacting 9eb, (b) is that the contact part 13ab contacts the front surface 3ha of the protrusion part 3h, and the contact part 13bb contacts the rear surface 9eb of the 2nd to-be-slid part 9e. (C) is a figure which shows the state which the contact part 13ab contacts the front surface 3ha of the protrusion part 3h, and the contact part 13bb is contacting the rear surface 3hb of the protrusion part 3h.
<Opening action>
First, the opening operation of the switch 1A will be described.

  Before the opening operation in the switch 1A, as shown in FIG. 6A, the slider 10 is urged by the coil spring 7, and the slider 10 is in the upper initial position (hereinafter, (Also called the first position). In this state, the contact portion 13ab of the first movable contact portion 13a is in contact with the front surface 9ea of the second sliding portion 9e, and the contact portion 13bb of the second movable contact portion 13b is the contact portion of the second sliding portion 9e. It is in contact with the rear surface 9eb. Therefore, the second fixed terminal 9 and the slider 10 are electrically connected, and 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 4b 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. 6B, the slider 10 has the contact portion 13ab in contact with the front surface 3ha of the protruding portion 3h, and the front surface 9ea of the second sliding portion 9e. Move to a position away from (hereinafter referred to as the second position). Even if the slider 10 moves to the second position, the contact portion 13bb is in contact with the rear surface 9eb of the second slid portion 9e, so that there is a gap between the first fixed terminal 8 and the second fixed terminal 9. It is in an energized state (that is, switch 1A is conductive).

  Next, the pressed portion 4b of the push button 4 is further pressed. As a result, the slider 10 moves further downward, and as shown in FIG. 6C, the slider 10 has the contact portion 13bb in contact with the rear surface 3hb of the protruding portion 3h. 9e moves to a position away from the rear surface 9eb (hereinafter referred to as a 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 protruding portion 3h, and the contact portion 13bb is in contact with the rear surface 3hb of the protruding portion 3h. As a result, the electrical connection between the second fixed terminal 9 and the slider 10 is interrupted, and the first fixed terminal 8 and the second fixed terminal 9 are not energized (that is, the switch 1A is in an insulated state). )

Further, when the pressed portion 4b of the push button 4 is pressed, the slider 10 further moves downward. During this time, the contact portion 13ab slides on the front surface 3ha of the protruding portion 3h, and the contact portion 13bb slides on the rear surface 3hb of the protruding portion 3h. Thus, the opening operation of the switch 1A is completed. Hereinafter, the position where the push button 4 is sufficiently pushed and the opening operation is completed is set as a fourth position.
<Closed action>
Next, the closing operation of the switch 1A will be described.

  Before the switch 1A is closed, the pressed portion 4b of the push button 4 is pushed downward (that is, located at the fourth position). That is, the contact portion 13ab is in contact with the front surface 3ha of the protruding portion 3h, the contact portion 13bb is in contact with the rear surface 3hb of the protruding portion 3h, and the space between the first fixed terminal 8 and the second fixed terminal 9 is The power is not supplied.

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

  When the slider 10 moves upward, as shown in FIG. 6B, first, the slider 10 has the contact portion 13bb in contact with the rear surface 9eb of the second sliding 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 into contact with the rear surface 9eb of the second slid portion 9e, so that the energized state between the first fixed terminal 8 and the second fixed terminal 9 (that is, , The switch 1A becomes conductive).

  When the slider 10 further moves upward, the contact portion 13ab comes into contact with the front surface 9ea of the second sliding portion 9e and moves away from the front surface 3ha of the protruding portion 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)
Generally, in a switch that opens and closes a large current (for example, a current of several hundred mA or more), arc discharge occurs at the contact point of the switch when the conduction state and the insulation state are switched. When arc discharge occurs, there is a problem that the contact point becomes high temperature due to arc discharge, the terminal is melted, and the terminal is consumed.

  Therefore, in the switch 1A of the present embodiment, as described above, the first normally closed fixed contact portion C1, which is the front surface (front surface) of the normally closed fixed contact portion, is initially set when the slider 10 is pressed by the push button 4. In order from the position (first position) to the moving direction, a front surface 9ea of the second sliding portion 9e and a front surface 3ha of the protruding portion 3h are formed. Further, the second normally closed fixed contact portion C2, which is the rear surface (back surface) of the normally closed fixed contact portion, is moved in a direction in which the slider 10 is pressed by the push button 4 and moves from the initial position (first position). In order, the rear surface 9eb of the second sliding portion 9e and the rear surface 3hb of the protruding portion 3h are formed. In the direction in which the slider 10 moves (Z-axis direction), the position of the boundary between the rear surface 9eb of the second sliding portion 9e and the rear surface 3hb of the protruding portion 3h is the front surface of the second sliding portion 9e. It is below the position of the boundary between 9ea and the front surface 3ha of the protrusion 3h. As a result, while the slider 10 moves, the timing when the contact portion 13ab reaches the boundary between the front surface 9ea of the second sliding portion 9e and the front surface 3ha of the protruding portion 3h, and the contact portion 13bb becomes the second covered portion. The timing of reaching the boundary between the rear surface 9eb of the sliding portion 9e and the rear surface 3hb of the protruding portion 3h is different.

  With the above configuration, the position where the conduction state and the insulation state in the opening operation of the switch 1A are switched is a boundary between the rear surface 9eb of the second sliding portion 9e and the rear surface 3hb of the protruding portion 3h. As a result, in the opening operation of the switch 1A, arc discharge occurs on the second normally closed fixed contact portion C2 side of the normally closed fixed contact portion.

  Further, the position where the conducting state and the insulating state are switched in the closing operation of the switch 1A is a boundary between the rear surface 9eb of the second sliding portion 9e and the rear surface 3hb of the protruding portion 3h. As a result, even in the closing operation of the switch 1A, arc discharge occurs on the second normally closed fixed contact portion C2 side of the normally closed fixed contact portion.

  As described above, in the switch 1A, arc discharge occurs on the second normally closed fixed contact portion C2 side of the normally closed fixed contact portion in both the opening operation and the closing operation. That is, when the contact portion 13ab is at a position for switching 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 sliding portion 9e and the front surface 3ha of the protruding portion 3h) The contact portion 13bb is in contact with the rear surface 9eb of the second sliding portion 9e, and the slider 10 and the second fixed terminal 9 are at the same potential. Therefore, no arc discharge occurs in the first normally closed fixed contact portion C1. As a result, the first normally closed fixed contact portion C1 and the contact portion 13ab of the first movable contact portion 13a can be prevented from being consumed by arc discharge. In addition, consumable powder generated by arc discharge can hinder contact conduction or insulation. However, in the switch 1A, since the consumable powder generated by the arc discharge is generated only on the second normally closed fixed contact portion C2 side, the consumable powder is the first normally closed side opposite to the second normally closed fixed contact portion C2 side. It is difficult to move to the fixed contact portion C1 side. Therefore, it is possible to prevent the switch 1A from becoming defective in conduction and insulation. For this reason, compared with the conventional switch, while being able to open and close a high electric current, a conduction | electrical_connection state and an insulation state can be maintained stably.

  In addition, the switch 1A realizes a configuration that does not cause arc discharge in the contact portion 13ab by one second sliding portion 9e and one movable contact portion 13 sandwiching the second sliding portion 9e. . Therefore, the switch 1A has a simple configuration and has high durability and reliability.

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

  The switch 1B in the present modification is a second one in which the movable contact portion 14 is replaced with the movable contact portion 13 of the slider 10 in the switch 1A, and the second slid portion 9e of the second fixed terminal 9 in the switch 1A. The sliding portion 9f is provided with a protruding portion 3i instead of the protruding portion 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 protruding portion 3i of the base 3 is a flat surface, and the lower surface of the second sliding portion 9f is a flat surface. The upper surface of the protruding portion 3i and the lower surface of the second sliding portion 9f are in contact with each other on a plane perpendicular to the vertical direction (a plane parallel to the XY plane).

  The front surface 9fa (first conduction region) of the second sliding portion 9f having conductivity and the front surface 3ia (first insulation region) of the protruding portion 3i having insulation properties are the first normally closed fixed contact in the switch 1B. It functions as part C3. In addition, 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 projecting portion 3i having insulation have a second normally closed state in the switch 1B. It functions as the fixed contact C4. The first normally closed fixed contact portion C3 and the second normally closed fixed contact portion C4 constitute a normally closed fixed contact portion (open / close contact portion) 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. The first movable contact portion 14a and the second movable contact portion 14b are used to A clip that sandwiches the normally closed fixed contact portion is formed. The first movable contact portion 14a is provided at an arm portion 14aa extending downward from the right end of the connecting portion 11 and a tip of the arm portion 14aa, and a contact portion (first contact) that slides on the first normally closed fixed contact portion C3. Sliding portion) 14ab. Similarly, the second movable contact portion 14b includes an arm portion 14ba extending downward from the right end of the connecting portion 11, and a contact portion provided at the tip of the arm portion 14ba and sliding on the second normally closed fixed contact portion C4. (Second sliding portion) 14bb.

  In the switch 1B, the length of the arm portion 14aa of the first movable contact portion 14a is longer than the length of the arm portion 14ba of the second movable contact portion 14b. Thereby, in the up-down 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 this modification will be described with reference to FIG.

FIG. 8 shows the operation of the switch 1B. FIG. 8A shows the contact portion 14ab in contact with the front surface 9fa of the second sliding portion 9f and the contact portion 14bb in the rear surface of the second sliding portion 9f. It is a figure which shows the state which is contacting 9fb, (b) is the contact part 14ab contacting the front surface 3ia of the protrusion part 3i, and contact part 14bb is contacting the rear surface 9fb of the 2nd to-be-slid part 9f. (C) is a figure which shows the state which contact part 14ab contacts the front surface 3ia of the protrusion part 3i, and contact part 14bb is contacting the rear surface 3ib of the protrusion part 3i.
<Opening action>
First, the opening operation of the switch 1B will be described.

  Before the opening operation in the switch 1B, 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. Yes. In this state, the second fixed terminal 9 and the slider 10 are electrically connected, and the first fixed terminal 8 and the second fixed terminal 9 are energized (that is, the switch 1B). Is in a conductive state).

  Next, the pressed portion 4b 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. 8B, the slider 10 has the contact portion 14ab of the first movable contact portion 14a in contact with the front surface 3ia of the projecting portion 3i and the second object. It moves to a position (second position) away from the front surface 9fa of the sliding portion 9f. Even if the slider 10 moves to the second position, the contact portion 14bb of the second movable contact portion 14b is in contact with the rear surface 9fb of the second sliding portion 9f, so that the first fixed terminal 8 and the second The fixed terminal 9 is energized (that is, the switch 1B is conductive).

  Next, the pressed portion 4b of the push button 4 is further pressed. As a result, the slider 10 further moves downward, and as shown in FIG. 8C, the slider 10 has the contact portion 14bb in contact with the rear surface 3ib of the protruding portion 3i and the second sliding portion. 9f moves to a position (third position) away from the rear surface 9fb. 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 interrupted, and the first fixed terminal 8 and the second fixed terminal 9 are not energized (that is, the switch 1B is in an insulated state). )

Further, when the pressed portion 4b of the push button 4 is pressed, the slider 10 further moves downward. During this time, 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. Hereinafter, the position where the push button 4 is sufficiently pushed and the opening operation is completed is set as a fourth position.
<Closed action>
Next, the closing operation of the switch 1B will be described.

  Before the switch 1B is closed, the pressed portion 4b of the push button 4 is pressed downward (that is, located at the fourth position). That is, the contact portion 14ab is in contact with the front surface 3ia of the protruding portion 3i, the contact portion 14bb is in contact with the rear surface 3ib of the protruding portion 3i, and the gap between the first fixed terminal 8 and the second fixed terminal 9 is The power is not supplied.

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

  When the slider 10 moves upward, as shown in FIG. 8B, the slider 10 has the contact portion 14bb in contact with the rear surface 9fb of the second sliding portion 9f and the rear surface 3ib of the protruding portion 3i. Move to a position away from (second position). When the slider 10 moves to the second position, the contact portion 14bb comes into contact with the rear surface 9fb of the second slid portion 9f, so that the first fixed terminal 8 and the second fixed terminal 9 are energized (that is, , The switch 1B becomes conductive).

  When the slider 10 further moves upward, the contact portion 14ab comes into contact with the front surface 9fa of the second sliding portion 9f and moves away from the front surface 3ia of the protruding portion 3i. When the slider 10 further moves upward, the slider 10 moves to the initial position (first position) as shown in FIG. Thus, the closing operation of the switch 1B is completed.

  As described above, in the switch 1B, in the opening operation and the closing operation, the position where the conduction state and the insulation state of the switch 1B are switched is the boundary between the rear surface 9fb of the second sliding portion 9f and the rear surface 3ib of the protruding portion 3i. It becomes. Therefore, in both the opening operation and the closing operation, arc discharge occurs on the second normally closed fixed contact portion C4 side of the normally closed fixed contact portion. That is, when the contact portion 14ab is at a position for switching between conduction and insulation in the first normally closed fixed contact portion C3 (that is, the boundary between the front surface 9fa of the second sliding portion 9f and the front surface 3ia of the protruding portion 3i) The contact portion 14bb is in contact with the rear surface 9fb of the second sliding portion 9f, and the slider 10 and the second fixed terminal 9 are at the same potential. Therefore, no arc discharge occurs in the first normally closed fixed contact C3. As a result, it is possible to prevent the first normally closed fixed contact portion C3 and the contact portion 14ab of the first movable contact portion 14a from being consumed by arc discharge. Further, the consumable powder generated by the arc discharge on the second normally closed fixed contact portion C4 side hardly moves to the first normally closed fixed contact portion C3 side which is the opposite side to the second normally closed fixed contact portion C4 side. Therefore, it is possible to prevent the switch 1B from becoming poorly conductive and poorly insulated.

[Embodiment 2]
It will be as follows if other embodiment of this invention is described based on FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  The switch 1C in the present embodiment replaces the second sliding portion 9g of the second fixed terminal 9 in the switch 1A with the second sliding portion 9g, and replaces the protruding portion 3h of the base 3 in the switch 1A with the protruding portion. 3j.

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

  As shown in FIG. 9, the protrusion 3j protrudes leftward from the protrusion 3g at the upper part of the protrusion 3g. 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 sliding portion 9g extends leftward from the embedded 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 in the front-rear direction of the upper surface of the second sliding portion 9g. The step formed on the upper surface of the second slidable portion 9g and the step formed on the lower surface of the protruding portion 3j are engaged so that the upper surface of the second slidable portion 9g and the upper surface of the protruding portion 3j are in contact with each other. It touches.

  As shown in FIG. 10, 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 projecting portion 3j having insulation are provided in the switch 1C. The first normally open fixed contact portion D1 functions. Further, the rear surface 9gb (second conductive region) of the second sliding portion 9g having conductivity and the rear surface 3jb (second insulating region) of the projecting portion 3j having insulating properties are second normally opened in the switch 1C. It functions as the fixed contact portion D2. The first normally open fixed contact portion D1 and the second normally open fixed contact portion D2 constitute a normally open fixed contact portion (open / close contact portion) 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. FIG. 11A shows a state in which the contact portion 13ab is in contact with the front surface 3ja of the protruding portion 3j and the contact portion 13bb is in contact with the rear surface 3jb of the protruding portion 3j. (B) is a diagram showing a state in which the contact portion 13ab is in contact with the front surface 9ga of the second sliding portion 9g, and the contact portion 13bb is in contact with the rear surface 3jb of the protruding portion 3j; (C) is a diagram showing a state in which the contact portion 13ab is in contact with the front surface 9ga of the second sliding portion 9g and the contact portion 13bb is in contact with the rear surface 9gb of the second sliding portion 9g.
<Closed action>
First, the closing operation of the switch 1C will be described.

  Prior to the closing operation of the switch 1C, as shown in FIG. 11A, the slider 10 is biased by the coil spring 7, and the slider 10 is in the upper initial position (hereinafter, (Also called the first position). In this state, the contact portion 13ab of the first movable contact portion 13a is in contact with the front surface 3ja of the projection portion 3j, and the contact portion 13bb of the second movable contact portion 13b is in contact with the rear surface 3jb of the projection portion 3j. For this reason, the second fixed terminal 9 and the slider 10 are electrically disconnected, and the first fixed terminal 8 and the second fixed terminal 9 are not energized (that is, the switch 1C is insulated). State).

  Next, the pressed portion 4b 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, the slider 10 has the contact portion 13ab in contact with the front surface 9ga of the second sliding portion 9g and the front surface 3ja of the protruding portion 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 comes into contact with the front surface 9ga of the second sliding portion 9g, so that the second fixed terminal 9 and the slider 10 are electrically connected. As a result, the first fixed terminal 8 and the second fixed terminal 9 are energized (that is, the switch 1C is energized).

  Next, the pressed portion 4b of the push button 4 is further pressed. As a result, the slider 10 moves further downward, and as shown in FIG. 11C, the slider 10 has the contact portion 13bb in contact with the rear surface 9gb of the second sliding portion 9g and the protruding portion. 3j moves to a position away from the rear surface 3jb (hereinafter referred to as a third position).

Further, when the pressed portion 4b of the push button 4 is pressed, the slider 10 further moves downward. During this time, the contact portion 13ab slides on the front surface 9ga of the second sliding portion 9g, and the contact portion 13bb slides on the rear surface 9gb of the second sliding portion 9g. Thus, the closing operation of the switch 1C is completed. Hereinafter, the position where the push button 4 is sufficiently pushed and the closing operation is completed is set as a fourth position.
<Opening action>
Next, the opening operation of the switch 1C will be described.

  Before the opening operation of the switch 1C, the pressed portion 4b of the push button 4 is pressed 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 sliding portion 9g, and the contact portion 13bb is in contact with the rear surface 9gb of the second sliding portion 9g. And the second fixed terminal 9 are energized.

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

  When the slider 10 moves upward, as shown in FIG. 11B, first, the slider 10 has the contact portion 13bb in contact with the rear surface 3jb of the protruding portion 3j and the second sliding portion 9g. It moves to a position (second position) away from the rear surface 9gb. Even if the slider 10 moves to the second position, the contact portion 13ab is in contact with the front surface 9ga of the second sliding portion 9g, so that the gap between the first fixed terminal 8 and the second fixed terminal 9 is It is in an energized state (that is, switch 1A is conductive).

  When the slider 10 further moves upward, the contact portion 13ab contacts the front surface 3ja of the protruding portion 3j and moves away from the front surface 9ga of the second sliding portion 9g. As a result, the contact portion 13ab comes into contact with the front surface 3ja of the projecting portion 3j, and the contact portion 13bb comes into contact with the rear surface 3jb of the projecting portion 3j, so that the electrical connection between the second fixed terminal 9 and the slider 10 is achieved. The connection is cut off, and the first fixed terminal 8 and the second fixed terminal 9 are not energized (that is, the switch 1C is in an insulated state).

  When the slider 10 further moves upward, the slider 10 moves to the initial position (first position) as shown in FIG. 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 first normally open fixed contact portion D1, which is the front surface (front surface) of the normally open fixed contact portion, is pressed to the initial position (the slider 10 is pressed by the push button 4). In order from the first position) to the moving direction, a front surface 3ja of the protruding portion 3j and a front surface 9ga of the second sliding portion 9g are formed. Further, the second normally open fixed contact portion D2 which is the rear surface (back surface) of the normally open fixed contact portion is directed in a direction in which the slider 10 is pressed by the push button 4 and moves from the initial position (first position). In order, the rear surface 3jb of the protruding portion 3j and the rear surface 9gb of the second sliding portion 9g are formed. In the direction in which the slider 10 moves (Z-axis direction), the position of the boundary between the rear surface 9gb of the second sliding portion 9g and the rear surface 3jb of the protruding portion 3j is the front surface of the second sliding portion 9g. It is below the position of the boundary between 9ga and the front surface 3ja of the protrusion 3j.

  With the above configuration, in the switch 1C, in both the opening operation and the closing operation, the positions where the conduction state and the insulation state of the switch 1C are switched are the front surface 9ga of the second sliding portion 9g and the front surface 3ja of the protruding portion 3j. It becomes the boundary. As a result, in both the opening operation and the closing operation of the switch 1C, arc discharge occurs on the first normally open fixed contact portion D1 side of the normally open fixed contact portion. That is, when the contact portion 13bb is in a position for switching between conduction and insulation in the second normally open fixed contact portion D2 (that is, the boundary between the rear surface 9gb of the second sliding portion 9g and the rear surface 3jb of the protruding portion 3j), The contact portion 13ab is in contact with the front surface 9ga of the second sliding portion 9g, and the slider 10 and the second fixed terminal 9 are at the same potential. Therefore, arc discharge does not occur in the second normally open fixed contact portion D2. As a result, it is possible to prevent the second normally open fixed contact portion D2 and the contact portion 13bb of the second movable contact portion 13b from being consumed by arc discharge. Further, in the switch 1C, since the consumable powder generated by the arc discharge is generated only on the first normally open fixed contact portion D1 side, the consumable powder is the second normally open side opposite to the first normally open fixed contact portion D1 side. It is difficult to move to the fixed contact portion D2 side. Therefore, it is possible to prevent the switch 1C from becoming defective in conduction and insulation.

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

  The switch 1D according to this modification includes a movable contact portion 14 instead of the movable contact portion 13 of the slider 10 in the switch 1C, and a second sliding portion 9h instead of the second sliding portion 9g in the switch 1C. In addition, a 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 protruding portion 3k of the base 3 is a flat surface, and the upper surface of the second sliding portion 9h is a flat surface. The lower surface of the projecting portion 3k and the upper surface of the second sliding portion 9h are in contact with each other on a plane perpendicular to the vertical direction (a plane parallel to the XY plane).

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

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

FIG. 13 shows the operation of the switch 1D. FIG. 13A shows a state in which the contact portion 14ab is in contact with the front surface 3ka of the protruding portion 3k, and the contact portion 14bb is in contact with the rear surface 3kb of the protruding portion 3k. (B) is a diagram showing a state in which the contact portion 14ab is in contact with the front surface 9ha of the second sliding portion 9h, and the contact portion 14bb is in contact with the rear surface 3kb of the protruding portion 3k. (C) is a diagram showing a state in which the contact portion 14ab is in contact with the front surface 9ha of the second sliding portion 9h and the contact portion 14bb is in contact with the rear surface 9hb of the second sliding portion 9h.
<Closed action>
First, the closing operation of the switch 1D will be described.

  Prior to the closing operation of the switch 1D, as shown in FIG. 13A, the slider 10 is biased by the coil spring 7, and the slider 10 is in the upper initial position (hereinafter, (Also called the first position). In this state, the contact portion 14ab of the first movable contact portion 14a is in contact with the front surface 3ka of the protrusion 3k, and the contact portion 14bb of the second movable contact portion 14b is in contact with the rear surface 3kb of the protrusion 3k. For this reason, the second fixed terminal 9 and the slider 10 are electrically disconnected, and the first fixed terminal 8 and the second fixed terminal 9 are not energized (that is, the switch 1D is insulated). State).

  Next, the pressed portion 4b 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. 13B, the slider 10 has the contact portion 14ab in contact with the front surface 9ha of the second sliding portion 9h and the front surface 3ka of the protruding portion 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 sliding portion 9h, so that the second fixed terminal 9 and the slider 10 are electrically connected. As a result, the first fixed terminal 8 and the second fixed terminal 9 are energized (that is, the switch 1D is energized).

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

Further, when the pressed portion 4b of the push button 4 is pressed, the slider 10 further moves downward. During this time, the contact portion 14ab slides on the front surface 9ha of the second sliding portion 9h, and the contact portion 14bb slides on the rear surface 9hb of the second sliding portion 9h. Thus, the closing operation of the switch 1D is completed. Hereinafter, the position where the push button 4 is sufficiently pushed and the closing operation is completed is set as a fourth position.
<Opening action>
Next, the opening operation of the switch 1D will be described.

  Before the opening operation of the switch 1D, the pressed portion 4b of the push button 4 is 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 sliding portion 9h, and the contact portion 14bb is in contact with the rear surface 9hb of the second sliding portion 9h. And the second fixed terminal 9 are energized.

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

  When the slider 10 moves upward, as shown in FIG. 13B, first, the slider 10 has the contact portion 14bb in contact with the rear surface 3kb of the protruding portion 3k and the second sliding 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 sliding portion 9h, so that the gap between the first fixed terminal 8 and the second fixed terminal 9 is It is in an energized state (that is, switch 1A is conductive).

  When the slider 10 further moves upward, the contact portion 14ab contacts the front surface 3ka of the protruding portion 3k and moves away from the front surface 9ha of the second sliding portion 9h. As a result, the contact portion 14ab comes into contact with the front surface 3ka of the projecting portion 3k, and the contact portion 14bb comes into contact with the rear surface 3kb of the projecting portion 3k, so that the electrical connection between the second fixed terminal 9 and the slider 10 is achieved. The connection is cut off, and the first fixed terminal 8 and the second fixed terminal 9 are not energized (that is, the switch 1D is in an insulated state).

  When the slider 10 further moves upward, the slider 10 moves to the initial position (first position) as shown in FIG. 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 position where the conduction state and the insulation state of the switch 1D are switched is the boundary between the front surface 9ha of the second sliding portion 9h and the front surface 3ka of the protruding portion 3k. It becomes. Therefore, in both the opening operation and the closing operation, arc discharge occurs on the first normally open fixed contact portion D3 side of the normally open fixed contact portion. That is, when the contact portion 14bb is in a position for switching between conduction and insulation in the second normally open fixed contact portion D4 (that is, the boundary between the rear surface 9hb of the second sliding portion 9h and the rear surface 3kb of the protruding portion 3k), The contact portion 14ab is in contact with the front surface 9ha of the second sliding portion 9h, and the slider 10 and the second fixed terminal 9 are at the same potential. Therefore, no arc discharge occurs in the second normally open fixed contact portion D4. As a result, it is possible to prevent the second normally open fixed contact portion D4 and the contact portion 14bb of the second movable contact portion 14b from being consumed by arc discharge. Further, consumable powder generated by arc discharge on the first normally open fixed contact portion D3 side is unlikely to move to the second normally open fixed contact portion D4 side, which is the opposite side of the first normally open fixed contact portion D3 side. Therefore, it is possible to prevent the switch 1D from becoming defective in conduction and insulation.

[Embodiment 3]
The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are 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 where the slider 10 is not pressed by the push button 4.

  As shown in FIG. 14, the switch 1E includes a protruding portion 3m instead of the protruding portion 3j of the switch 1C in the second embodiment.

  The front surface 9ga (first conduction region) of the second sliding portion 9g having conductivity and the front surface 3ma (first insulation region) of the protruding portion 3m having insulation properties are the first normally open fixed contact in the switch 1E. It functions as the part D1. Further, the rear surface 9gb (second conductive region) of the second sliding portion 9g having conductivity and the rear surface 3mb (second insulating region) of the projecting portion 3m having insulating properties are second normally opened in the switch 1E. It functions as the fixed contact portion D2. The first normally open fixed contact portion D1 and the second normally open fixed contact portion D2 constitute a normally open fixed contact portion (open / close contact portion) in the switch 1E.

  As shown in FIG. 14, the switch 1E is configured such that when the slider 10 is in a position (initial position) where the slider 10 is not pressed by the push button 4, the slider 10 deviates from the protruding portion 3m. . Thereby, the insulation of the switch 1E in the state which has the slider 10 in an initial position can be improved.

  Further, in the switch 1E, the distance between the front surface 3ma and the rear surface 3mb becomes smaller at the upper portion of the protruding portion 3m as it goes in the direction opposite to the direction in which the slider 10 moves from the initial position (that is, upward). It has a shape. Thereby, 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 protruding portion 3m.

[Embodiment 4]
The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  The switch 1F in this 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 part of the slider 10 and the base 3b 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 includes an arm portion 15aa extending downward from the left end of the connecting portion 11 and two contact portions that are provided at the tip of the arm portion 15aa and contact the front surface 9ea of the second sliding portion 9e. (First sliding portion) 15ab and 15ac. The contact portions 15ab and 15ac are formed apart from each other in the left-right direction.

  With the configuration described above, in the switch 1F, the movable contact portion 15 can come into contact with the front surface 9ea of the second sliding portion 9e at the two locations of the contact portion 15ab and the contact portion 15ac. Thereby, for example, between the contact part 15ab and the front surface 9ea of the second sliding part 9e due to the presence of foreign matter between the contact part 15ab and the front surface 9ea of the second sliding part 9e. Even when the electrical connection cannot be performed, the electrical connection can be performed between the contact portion 15ac and the front surface 9ea of the second sliding portion 9e. Therefore, it is possible to improve the reliability of contact between the movable contact portion 15 and the front surface 9ea of the second sliding portion 9e. As a result, the reliability of the switch 1F can be improved.

  Although not shown, the movable contact portion 15 is configured such that the second movable contact portion includes two contact portions.

  In the present embodiment, the first movable contact portion 15a includes the two contact portions 15ab and 15ac. However, the present invention is not limited to this. That is, the 1st movable contact part 15a may be provided with three or more contact parts.

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

1A to 1F switch 3ha, 3ia, 3ja, 3ka, 3ma front surface (first insulating region)
3hb, 3ib, 3jb, 3kb, 3mb Rear surface (second insulating region)
4 Push buttons (operating members)
9ea, 9fa, 9ga, 9ha Front (first conduction region)
9eb, 9fb, 9gb, 9hb Rear surface (second conduction region)
13-15 Movable contact part 13ab, 14ab, 15ab, 15ac Contact part (1st sliding part)
13bb, 14bb contact part (second sliding part)
C1, C3 First normally closed fixed contact part (switch contact part, surface)
C2, C4 Second normally closed fixed contact part (switch contact part, back side)
D1, D3 First normally open fixed contact part (switch contact part, surface)
D2, D4 Second normally open fixed contact (switch contact, back)

Claims (8)

Switching contacts,
An operation member;
A switch that moves by being operated by the operation member and includes a movable contact portion that sandwiches the open / close contact portion,
The switching contact portion is
A surface provided with a first conduction region and a first insulation region formed side by side along the moving direction of the movable contact portion;
A rear surface including a second conduction region and a second insulation region formed side by side along the movement direction;
The movable contact portion includes a first sliding portion that slides on the front surface and a second sliding portion that slides on the back surface,
While the movable contact portion moves, the timing at which the first sliding portion reaches the boundary between the first conductive region and the first insulating region, and the second sliding portion is connected to the second conductive region. The switch having a different timing for reaching the boundary with the second insulating region.   The position of the boundary between the first conductive region and the first insulating region differs from the position of the boundary between the second conductive region and the second insulating region in the moving direction. Item 2. The switch according to item 1.   2. The position according to claim 1, wherein a position where the first sliding portion slides on the front surface and a position where the second sliding portion slides on the back surface are different in the moving direction. Switch. On the surface, a first conduction region and a first insulation region are formed sequentially in a direction in which the movable contact portion is operated by the operation member and moves from an initial position.
2. The second conduction region and the second insulation region are formed on the rear surface in order in a direction in which the movable contact portion is operated by the operation member and moves from an initial position. The switch of any one of -3. A first insulating region and a first conduction region are formed on the surface in order in a direction in which the movable contact portion is operated by the operation member and moves from an initial position.
The second insulating region and the second conduction region are formed on the back surface in order in a direction in which the movable contact portion is operated by the operation member and moves from an initial position. The switch of any one of -3.   The switch according to any one of claims 1 to 5, wherein the movable contact portion contacts the surface at a plurality of locations separated from each other.   The switch according to claim 5, wherein the movable contact portion is separated from the surface at the initial position.   The opening / closing contact portion has a shape in which a distance between the front surface and the back surface decreases as the movable contact portion moves in a direction opposite to a direction in which the movable contact portion moves from the initial position. Item 8. The switch according to item 7.

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