JP2012243530A - Lock switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move an actuator in a direction different from an input direction of external force for operating a heart cam mechanism, in a lock switch adopting the heart cam mechanism.SOLUTION: An actuator 111 can swivel about a rotation shaft 121, has an operating portion 122 at a tip end side of a first swiveling direction R1, and is energized in the first swiveling direction R1 by a plunger spring 133 of a plunger device 113. The actuator 111 is provided with a heart cam groove 124. A vertical direction of a heart shape of the heart cam groove 124 extends in the first swiveling direction R1. A lock pin 112 is rotatably held at a first end portion 112A, and slides with a bottom portion 124E of the heart cam groove 124 with pressure at a second end portion 112B to circle only in a predetermined direction. A plunger 132 adds force in a second swiveling direction R2 to the actuator 111, thereby displacing the operating portion 122 between two positions.

Description

  The present invention relates to a lock switch that employs a heart cam mechanism.

  Patent Document 1 discloses a technique of a push latch 1 that alternately switches between a door closed state and a door open state with respect to a door such as a cabinet. The push latch 1 is attached to a predetermined object 100, and includes a first case member 10 that is directly fixed to the object 100, a second case member 20 that is accommodated in the first case member 10, and a second case member 10. The sliding member 30 and the spring 90 are accommodated in the case member 20. The main body 40 constituting the sliding member 30 has a head portion 41 and a body portion 42 extending from the head portion 41. A heart cam groove 46 is formed on the rear side of the left side surface of the main body 40. The heart cam groove 46 has a substantially heart shape when viewed from the left side, and a plurality of step portions are formed at the bottom thereof. One end (locking end portion 71) of the lock pin 70 is restrained by the protruding portion 26 of the second case member 20, and the other end (sliding end portion 72) is slidably engaged with the heart cam groove 46. The sliding range of the sliding member 30 is regulated. The rear end of the spring 90 is locked to the spring locking portion 28 of the second case member 20, and the main body 40 is urged forward by the front end. According to Patent Document 1, when the sliding member 30 is pressed in the backward direction, the sliding end 72 of the lock pin 70 slides on the bottom of the heart cam groove 46 while the sliding member 30 moves backward. The state in which the sliding member 30 is pulled in the second housing hole 21 (FIG. 2 in Patent Document 1) and the state in which the sliding member 30 protrudes from the second housing hole 21 (FIG. 6 in Patent Document 1) alternates. It is said that it is switched to.

JP 2010-270484 A

  Each figure of Patent Document 1 shows that the sliding member 30 moves in a direction in which the spring 90 expands and contracts while its moving direction is restricted by the inner peripheral surface of the second case member 20. However, when the push latch 1 described in Patent Literature 1 is mounted on various products, it is required to move the sliding member 30 in a direction different from the movement of the spring 90 depending on the attachment location.

  The inventor considered a virtual example of the lock switch 901 to which the heart cam lock mechanism used in the push latch 1 described in Patent Document 1 is applied. FIG. 12 is a schematic diagram illustrating an initial state of the lock switch 901 of the virtual example. FIG. 13 is a schematic diagram of a lock switch 901 of a virtual example in a state where the actuator 904 is pushed in following FIG. FIG. 14 is a schematic diagram of a lock switch 901 of a virtual example in a locked state following FIG. FIG. 15 is a schematic diagram of a lock switch 901 of a virtual example in a state where the actuator 904 is pushed in following FIG. FIG. 16 is a schematic diagram of the lock switch 901 of the virtual example that has returned to the initial state following FIG. 15.

  The lock switch 901 of the virtual example includes an actuator 904 slidable on a guide rail 903 extending orthogonally to the reference surface 902, a plunger 906 provided with a heart cam mechanism 905 extending in a direction orthogonal to the guide rail 903, and a plunger 906. A spring 907 that pushes the plunger 906 in the extending direction, and a lock pin 908 whose one end is fixed and the other end slides on the bottom surface of the heart cam mechanism 905. The actuator 904 is formed with a linear engagement groove 909 extending in a direction inclined in any of these two directions within a plane specified by the extending direction of the guide rail 903 and the extending direction of the plunger 906. A pin portion 910 that protrudes from the plunger 906 enters the engagement groove 909. The plunger 906 is housed in a guide cylinder 911, and the moving direction is regulated by the guide cylinder 911.

  When a force F for pushing the plunger 906 is applied to the plunger 906 in the initial state (FIG. 12) (FIG. 13), the actuator 904 is pulled by the pin portion 910 and moves to the left along the guide rail 903. . When the force F is released (FIG. 14), the spring 907 pushes back the plunger 906, the actuator 904 moves to the right along the guide rail 903 by the movement of the pin portion 910, and the lock pin 908 is locked to the heart cam mechanism 905. The pin portion 910 stops at a position where it holds the actuator 904 positioned to the left of the reference plane 902. When the force F is again applied to the plunger 906 (FIG. 15), the lock pin 908 is released from being locked by the lock portion 905a, and when the force F is subsequently released (FIG. 16), the spring 907 is moved to the plunger 906. The actuator 904 moves to the right along the guide rail 903 by the movement of the pin portion 910 and is returned to the reference plane 902.

  Here, the lock switch 901 of the above virtual example is provided with further mechanical elements such as a guide rail 903 and an actuator 904 in order to apply a force in a direction different from the movement of the spring 907, and the number of parts increases. This causes a problem that the space for mounting increases.

  The present invention has been made in view of the above points, and an object thereof is to move an actuator in a direction different from an input direction of an external force for operating the heart cam mechanism in a lock switch employing the heart cam mechanism.

  The lock switch of the present invention is capable of turning about a rotation axis, has an action portion on the tip side in the first turning direction, and is opposed to the first turning direction and the first turning direction by an elastic body. An actuator urged toward one of the second turning directions; and a heart shape provided on the actuator along a turning surface on which the actuator turns, and the heart extending along the first turning direction. A heart cam groove extending in the vertical direction of the shape, a first end portion which is held in a position-fixed and rotatable manner, and a bottom portion of the heart cam groove with pressure and sliding in a predetermined direction along the heart cam groove A lock pin that is rotatable about the first end, and is capable of applying a force to the actuator so as to resist the urging force of the elastic body. In the working portion is an initial position corresponding to the first locked state by the heart cam groove, is displaced between the working position corresponding to the second locked state by the heart cam groove.

  According to the present invention, by applying a force to the actuator so as to resist pulling by the elastic body, the actuator rotates about the rotation shaft, and the action portion provided on the actuator is displaced. Therefore, in the lock switch employing the heart cam mechanism, the actuator can be moved in a direction different from the input direction of the external force for operating the heart cam mechanism.

It is a perspective view of a lock switch. It is a perspective view of the lock switch seen from the opposite side to FIG. It is sectional drawing in the P arrow view of FIG. 2 which shows the state before inserting an engagement protrusion in the engagement hole part of a pusher typically. FIG. 3 is a cross-sectional view taken in the direction of arrow P in FIG. 2, schematically showing a state in the middle of inserting the engagement protrusion into the engagement hole portion of the pusher. It is sectional drawing in the P arrow view of FIG. 2 which shows typically the state after inserting an engagement protrusion in the engagement hole part of a pusher. It is a top view of the lock switch corresponding to the state shown in FIG. It is a top view of an actuator. It is a top view of the lock switch in the state where the pusher moved rightward from the state shown in FIG. It is a top view of a lock switch in the state where the plunger moved to the front side of the lock switch from the state shown in FIG. FIG. 10 is a plan view of the lock switch in a state where the plunger has moved to the back side of the lock switch from the state shown in FIG. 9. It is a top view of a lock switch in the state where the plunger moved to the front side of the lock switch from the state shown in FIG. It is a schematic diagram which shows the initial state of the lock switch of a virtual example. FIG. 13 is a schematic diagram of a lock switch of a virtual example in a state where the actuator is pushed in after FIG. 12. It is a schematic diagram of the lock switch of the virtual example in the locked state following FIG. FIG. 15 is a schematic diagram of a lock switch of a virtual example in a state where the actuator is pushed in after FIG. 14. FIG. 16 is a schematic diagram of a lock switch of a virtual example returned to the initial state following FIG. 15.

  One embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of the lock switch 101. FIG. 2 is a perspective view of the lock switch 101 viewed from the side opposite to FIG. The lock switch 101 includes a housing 102 having a flat box shape with an upper surface opening. The housing 102 accommodates each part described below and is configured to be closed by a lid part (not shown). Each part accommodated in the housing 102 includes an actuator 111, a lock pin 112, a plunger device 113, a pusher 114, a spring 114B, a first contact part 115, a second contact part 116, and the like. Details of these structures and operations will be described later with reference to FIGS.

  An emergency notch 103 is disposed on the left side of the front end face of the housing 102. The emergency notch 103 can be pulled out to the front side of the lock switch 101. In addition, a receptacle fitting portion 104 is disposed substantially at the center of the front end surface of the housing 102. The receptacle fitting portion 104 has three outlet blades (a first outlet blade 105A, a second outlet blade 105B, and a third outlet in order from the left in FIG. 1) in a hole portion 105 that opens to the front side. An outlet blade 105C) is provided.

  The bottom 102A of the housing 102 has a plate shape parallel to a lid (not shown). A hole 102B opens near the pusher 114 in the bottom 102A. Here, the pusher 114 is a member housed in the right region in FIG. The pusher 114 is slidable in the left-right direction in FIG. An engagement hole 114 </ b> A (see FIGS. 3 to 5) is provided at a position facing the hole 102 </ b> B in the pusher 114. The pusher 114 is pushed to the left in FIG. 1 by a spring 114 </ b> B disposed in the housing 102.

  FIG. 3 is a cross-sectional view taken in the direction of arrow P in FIG. 2, schematically showing a state before the engagement protrusion 501 is inserted into the engagement hole 114 </ b> A of the pusher 114. 4 is a cross-sectional view taken in the direction of arrow P in FIG. 2, schematically showing a state in the middle of inserting the engagement protrusion 501 into the engagement hole 114 </ b> A of the pusher 114. FIG. 5 is a cross-sectional view taken in the direction of arrow P in FIG. 2, schematically showing a state after the engagement protrusion 501 is inserted into the engagement hole 114 </ b> A of the pusher 114. 3 to 5 corresponds to the upper part in FIG. An engaging projection 501 is introduced from the bottom side of the lock switch 101 into the hole 102B provided in the bottom 102A. An engaging claw 502 is provided on the engaging protrusion 501. The front end of the engaging claw 502 faces the direction toward the spring 114B (the right direction in FIGS. 3 to 5). The engagement protrusion 501 is applied with a force in a direction against the urging force of the spring 114B (right direction in FIGS. 3 to 5) by another urging member (not shown), and is directed toward the spring 114B as a whole ( It is pushed in the right direction in FIGS. As long as the bottom portion 102A and the engaging claw 502 are not engaged with each other, the user moves the engaging protrusion 501 in the vertical direction to disengage the entire engaging protrusion 501 from the hole portion 102B, or the engaging claw 502. Can be positioned in the engaging hole 114A.

  When the engaging protrusion 501 is inserted into the hole 102B (FIG. 3), the tip of the engaging claw 502 comes into contact with the inner peripheral surface of the hole 102B, and the engaging protrusion 501 is slightly bent. Thereafter, when the engaging claw 502 of the engaging protrusion 501 is accommodated in the engaging hole 114A (FIG. 4), the bending is released by the restoring force of the engaging protrusion 501 itself and the urging force by the urging member is used. The engagement protrusion 501 pushes the pusher 114 in the direction toward the spring 114B (the right direction in FIGS. 3 to 5). As a result, the pusher 114 moves to the right (FIG. 5), and the engaging claw 502 is caught by the housing 102 and cannot be removed from the hole 102B. Note that the lower surface of the engagement protrusion 501 has a tapered shape 501A, and the engagement protrusion 501 is easily introduced into the hole 102B.

  6 is a plan view of the lock switch 101 corresponding to the state shown in FIG. FIG. 7 is a plan view of the actuator 111. Details of the internal structure of the lock switch 101 will be described with reference to FIGS.

[Actuator] The actuator 111 is disposed on the bottom 102A of the housing 102, and is rotatable in the circumferential direction of the rotation shaft 121 that is orthogonal to the bottom 102A and extends in the vertical direction. The actuator 111 is attached to a clockwise direction (first turning direction R1) in FIG. 6 about the rotation shaft 121 by a plunger spring 133 (described later) as an elastic body disposed in the plunger device 113. It is energized.

  An action part 122 is provided on the distal end side of the actuator 111 in the first turning direction R1. The action part 122 includes a first action part 122A, a second action part 122B, and a third action part 122C. 122 A of 1st action parts are located in the front end side of the 1st turning direction R1 with respect to the 2nd action part 122B and the 3rd action part 122C, and are separated from bottom 102A rather than the 2nd action part 122B and the 3rd action part 122C. ing. 122 A of 1st action parts push the 2nd contact piece 136 (after-mentioned) to 1st turning direction R1. Further, the second action portion 122B is located closer to the counterclockwise direction (second turning direction R2) in FIG. 6 than the first action portion 122A with the rotation shaft 121 as the center, and is more than the first action portion 122A. Close to bottom 102A. The second action part 122B moves in the first turning direction R1 and contacts the blocking part 144 (described later). In addition, the third action part 122C is located closer to the second turning direction R2 than the second action part 122B. The third action part 122C moves in the first turning direction R1 and the second turning direction R2, moves the movable contact piece 147 (described later), and opens and closes the second contact part 116.

  A pin hole 111A is provided on the distal end side of the actuator 111 in the second turning direction R2. A pin 132A (described later) of a plunger 132 provided in the plunger device 113 is inserted into the pin hole 111A.

  A heart cam groove 124 is provided on the upper surface of the actuator 111. The heart cam groove 124 has a heart shape along the turning surface of the actuator 111 (a surface parallel to the paper surface in FIG. 6). The bottom portion 124E of the heart cam groove 124 has a stepped shape so that the second end portion 112B (described later) of the lock pin 112 can be slidably moved only in the counterclockwise direction (circumferential direction R3) in FIG.

  The heart-shaped vertical direction of the heart cam groove 124 extends along the first turning direction R1. More specifically, the heart-shaped downward projecting portion 124A of the heart cam groove 124 is directed toward the distal end side in the second turning direction R2. The two heart-shaped upper protrusions of the heart cam groove 124 are directed toward the distal end side in the first turning direction R1. Hereinafter, for the purpose of explanation, of the two heart-shaped upper protrusions of the heart cam groove 124, the one closer to the rotation shaft 121 is referred to as a “first upper protrusion 124B” and the one farther from the rotation shaft 121 is referred to as “first 2 upper protrusions 124 </ b> C ”. A protrusion that is located between the first upper protrusion 124B and the second upper protrusion 124C along the heart cam groove 124 and is convex in the second turning direction R2 is referred to as a “lock protrusion 124D”. .

  The actuator 111 is provided with a hooking portion 122D on which the emergency notch 103 is hooked. The emergency notch 103 is a long member extending in the front-back direction, and is disposed in the left region in FIG. 6 inside the housing 102 and protrudes from the housing 102 to the front side. A hooking claw 103 </ b> A is provided at the rear end of the emergency notch 103. The emergency notch 103 is pushed to the back side of the lock switch 101 by a notch spring 103B extending from the inner wall surface 102C on the front side of the housing 102. When the emergency notch 103 is pulled to the front side of the lock switch 101, the hooking claw 103A is caught by the hooking portion 122D of the actuator 111, and the actuator 111 is forcibly turned in the second turning direction R2.

[Lock Pin] The lock pin 112 limits an area in which the actuator 111 moves with respect to the housing 102. Specifically, one end (first end 112 </ b> A) of the lock pin 112 is held by a holding wall 102 </ b> D that protrudes from the inner wall on the back side of the housing 102 to the front side. The holding wall 102D fixes the position of the first end 112A of the lock pin 112 and is rotatable. As a result, the lock pin 112 is rotatable about the first end.

  The end surface of the other end portion (second end portion 112B) of the lock pin 112 is in contact with the bottom portion 124E of the heart cam groove 124 with pressure. Here, an arc-shaped portion 124F is formed on a part of the inner side surface where the peripheral portion of the second end portion 112B of the rising lock pin 112 contacts the bottom portion 124E of the heart cam groove 124. The arcuate portion 124F has an arcuate shape with the rotation shaft 121 as the center in plan view, and the circumferential portion of the second end portion 112B of the lock pin 112 is in contact with and can slide smoothly.

[Plunger Device] The plunger device 113 includes a plunger case 131, a plunger 132, and a plunger spring 133. The plunger case 131 is attached to the inner wall surface 102 </ b> C on the front side of the housing 102. Plunger 132 is held by plunger case 131 and is slidable in the front-rear direction of lock switch 101 (the direction indicated by arrow R4 in FIG. 6). A pin 132A protrudes upward from the outer peripheral surface of the end of the plunger 132 on the tip side (the back side of the lock switch 101). The pin 132A enters the pin hole 111A. When the plunger 132 slides, the actuator 111 turns in the first turning direction R1 and the second turning direction R2. The plunger spring 133 pushes out the plunger 132 in a direction in which the plunger 132 protrudes toward the back surface of the lock switch 101.

  A metal piece 134 and a first contact piece 135 extend from the plunger device 113. The metal piece 134 is connected to the first outlet blade 105A. The first contact piece 135 has a spring property and tries to move in a direction (indicated by an arrow R5 in FIG. 6) in contact with the second contact piece 136 extending from the second outlet blade 105B. In FIG. 1 and FIG. 6, an interference portion 145 (described later) extending from the pusher 114 pushes the first contact piece 135 to the left in FIG. 6, and the first contact piece 135 is not in contact with the second contact piece 136. When the pusher 114 moves rightward in FIG. 6 and the interference portion 145 is retracted from the first contact piece 135, the first contact piece 135 comes into contact with the second contact piece 136. Here, the first contact piece 135, the second contact piece 136, and the interference part 145 constitute a first contact part 115.

  The first outlet blade 105A, the metal piece 134, the first contact piece 135, the second contact piece 136, and the second outlet blade 105B form a signal path for inputting a drive pulse to the plunger device 113. When a drive pulse is input to the plunger device 113, the plunger 132 moves in the front direction of the lock switch 101 in the plunger device 113. As a result, the actuator 111 moves in the second turning direction R2. After the movement of the plunger 132 in the plunger device 113 by the input of the drive pulse, the plunger spring 133 causes the plunger 132 to protrude toward the back surface of the lock switch 101. As a result, the actuator 111 moves in the first turning direction R1.

[Pusher] The pusher 114 includes a base portion 142 and an operation portion 143. The base 142 has a substantially rectangular parallelepiped shape, and an engagement hole 114A (see FIGS. 3 to 5) is formed. The base 142 is on the right side in FIG. 6 with respect to the blocking plate 141 disposed in the housing 102. The blocking plate 141 is a metal plate connected to the third outlet blade 105C and extending in the front-back direction of the lock switch 101.

  From the base portion 142, a spring receiving portion 142A protrudes to the back side of the lock switch 101. The spring receiving portion 142A is a portion that is pushed leftward in FIG. 6 from the spring 114B. The base 142 moves to the left in FIG. 6 when the spring receiving portion 142A is pushed by the spring 114B, and abuts against the blocking plate 141.

  The operation portion 143 protrudes leftward from the base portion 142 in FIG. 6, includes a blocking portion 144 and an interference portion 145, is inserted through a hole (not shown) provided in the blocking plate 141, and is more than the blocking plate 141. Located on the left. The blocking portion 144 is located at a location closer to the bottom portion 102A than the interference portion 145. A second action portion 122B that tries to move in the first turning direction R1 abuts against the side surface of the blocking portion 144 on the back side of the lock switch 101. Further, the interference unit 145 is located on the front side of the lock switch 101 with respect to the blocking unit 144 and protrudes to the left in FIG. The interference unit 145 moves the first contact piece 135 to the left in FIG. In addition, the interference part 145 is inserted in the hole provided in the 2nd contact piece 136, and is not contacting the 2nd contact piece 136, For this reason, the 2nd contact piece 136 is not moved.

  A fixed contact piece 146 protrudes to the left in FIG. 6 from an end of the blocking plate 141 on the back side of the lock switch 101. Further, in the housing 102, the movable contact piece 147 is disposed on the left side in FIG. 6 and on the front side of the lock switch 101 with respect to the fixed contact piece 146. The movable contact piece 147 is swingably held by the metal piece 148 connected to the second outlet blade 105B. A contact spring 149 is disposed between the movable contact piece 147 and the metal piece 148. The contact spring 149 pushes the movable contact piece 147 so that the movable contact piece 147 contacts the fixed contact piece 146. In FIGS. 1 and 6, the movable contact piece 147 is moved away from the fixed contact piece 146 by being moved against the urging force of the contact spring 149 by the third action portion 122 </ b> C of the actuator 111. When the actuator 111 moves in the first turning direction R1 and the third action part 122C is retracted from the movable contact piece 147, the movable contact piece 147 is pressed by the contact spring 149 and contacts the fixed contact piece 146. Here, the second contact portion 116 is configured by the fixed contact piece 146, the movable contact piece 147, the metal piece 148, the contact spring 149, and the third action portion 122C.

  The operation of the lock switch 101 configured as described above will be described with reference to FIGS. 6 and 8 to 11. First, referring to FIG. The lock switch 101 is used by fitting a receptacle 503 that receives the first outlet blade 105A, the second outlet blade 105B, and the third outlet blade 105C into the receptacle fitting portion 104. The receptacle 503 is connected to an external circuit (not shown), and drives and controls the plunger device 113 that is transmitted to the first outlet blade 105A and the second outlet blade 105B and input to the plunger device 113 by driving the external circuit. And a current flowing through the second outlet blade 105B and the third outlet blade 105C are transmitted.

  In FIG. 6, the engagement protrusion 501 (see FIGS. 3 to 5) is not inserted into the hole 102 </ b> B of the housing 102 and the engagement hole 114 </ b> A (see FIGS. 3 to 5) of the pusher 114. It is pushed to the left in FIG. 6 by the spring 114B. At this time, the pusher 114, the spring 114B, and the engagement protrusion 501 have the relationship shown in FIG. The interference part 145 provided in the pusher 114 pushes the first contact piece 135 to the left in FIG. 6 to separate the first contact piece 135 and the second contact piece 136, and the first contact part 115 is opened. Is in a state. In this state, even if an external circuit (not shown) is driven, no drive pulse is input to the plunger device 113.

  In FIG. 6, the plunger 132 is pushed to the back side of the lock switch 101 by the plunger spring 133, and the pin 132A of the plunger 132 tries to move the actuator 111 in the first turning direction R1. However, the second end 112B of the lock pin 112 is positioned in the locking protrusion 124D of the heart cam groove 124, and the actuator 111 cannot turn in the first turning direction R1. As a result, the actuator 111 stops without turning in either the first turning direction R1 or the second turning direction R2 (first locked state). At this time, the third action part 122C of the action part 122 holds the movable contact piece 147 against the urging force of the contact spring 149, and separates the movable contact piece 147 from the fixed contact piece 146. The position of the action part 122 at this time corresponds to the “initial position” in the claims.

  FIG. 8 is a plan view of the lock switch 101 with the pusher 114 moved to the right from the state shown in FIG. In FIG. 8, the emergency notch 103 and the notch spring 103B are omitted. When the engaging protrusion 501 (see FIGS. 3 to 5) is inserted into the hole 102 </ b> B of the housing 102 and the engaging hole 114 </ b> A (see FIGS. 3 to 5) of the pusher 114, the pusher 114 is connected to the engaging protrusion 501. It is pushed by the engaging claw 502 and moves to the right in FIG. At this time, the pusher 114, the spring 114B, and the engaging protrusion 501 reach the positional relationship shown in FIG. 5 through the state shown in FIG. 4, and the engaging protrusion 501 comes out of the hole 102B (see FIGS. 2 to 5). Disappear. Thereby, the interference part 145 moves away from the first contact piece 135, the first contact piece 135 moves in the direction of the arrow R5 by its own spring property, and contacts the second contact piece 136, and the first contact part 115 is A path of a driving pulse that is closed and is connected from the first outlet blade 105A via the plunger device 113 to the second outlet blade 105B is formed.

  FIG. 9 is a plan view of the lock switch 101 in a state where the plunger 132 is moved to the front side of the lock switch 101 from the state shown in FIG. In FIG. 9, the emergency notch 103 and the notch spring 103B are omitted. In the state shown in FIG. 8, when a drive pulse is input to the plunger device 113 by driving an external circuit (not shown), the plunger device 113 causes the plunger 132 to be biased by the plunger spring 133 (see FIG. 6). Move it to the front side of the lock switch 101 against it. At this time, the pin 132A of the plunger 132 turns the actuator 111 in the second turning direction R2. The second end 112B of the lock pin 112 slides on the bottom 124E of the heart cam groove 124 in the circumferential direction R3 from the locking projection 124D to the second upper projection 124C.

  FIG. 10 is a plan view of the lock switch 101 in a state where the plunger 132 has moved to the back side of the lock switch 101 from the state shown in FIG. In FIG. 10, the emergency notch 103 and the notch spring 103B are omitted. After the plunger 132 moves to the front side of the lock switch 101 by the input of the driving pulse, the plunger spring 133 (see FIG. 6) pushes the plunger 132 to the back side of the lock switch 101. At this time, the pin 132A of the plunger 132 turns the actuator 111 in the first turning direction R1 until it hits the holding wall 102D. Further, the second end portion 112B of the lock pin 112 slides on the bottom portion 124E of the heart cam groove 124 in the circumferential direction R3 from the second upper protrusion 124C to the lower protrusion 124A.

  Here, the holding wall 102D blocks the actuator 111 that attempts to move further in the first turning direction R1 from the position shown in FIG. 10, and serves as a stopper. In the holding wall 102 </ b> D, the plunger 132 moves too far to the back side of the lock switch 101 due to malfunction of the plunger device 113, and the second action part 122 </ b> B pushes the second contact piece 136 too much and gets over the second contact piece 136. Prevent the situation.

  Further, when the peripheral portion of the second end 112B of the lock pin 112 moves in the heart cam groove 124, it may come into contact with the inner surface rising from the bottom 124E of the heart cam groove 124. The heart cam groove 124 has an arcuate portion. Since 124F is formed, the second end 112B of the lock pin 112 is not caught on the inner surface.

  In FIG. 10, the plunger 132 is pushed to the back side of the lock switch 101 by the plunger spring 133, and the pin 132A of the plunger 132 tries to move the actuator 111 in the first turning direction R1. However, the second end 112B of the lock pin 112 is positioned in the lower protrusion 124A of the heart cam groove 124, and the actuator 111 cannot turn in the first turning direction R1. As a result, the actuator 111 stops without turning in either the first turning direction R1 or the second turning direction R2 (second locked state). At this time, the first action part 122A of the action part 122 moves in the first turning direction R1 and presses the second contact piece 136 against the first contact piece 135 that tries to move in the direction of the arrow R5. Stabilize 115 with closed. At this time, the third action part 122C of the action part 122 moves in the first turning direction R1 and moves away from the movable contact piece 147, and the movable contact piece 147 is pressed by the contact spring 149 to contact the fixed contact piece 146. To do. That is, the second contact portion 116 is closed. When the movable contact piece 147 comes into contact with the contact spring 149, a current path is connected from the second outlet blade 105B to the third outlet blade 105C via the metal piece 148, the movable contact piece 147, the contact spring 149 and the blocking plate 141. Is formed. The position of the action part 122 at this time corresponds to the “action position” in the claims.

  As shown in FIG. 10, the second action part 122B of the action part 122 can turn in the first turning direction R1 because the pusher 114 moves to the right in FIG. 10 and the second action part 122B becomes a blocking part. This is because it is not blocked by 144. On the other hand, as shown in FIG. 6, in the state where the pusher 114 is pushed to the left in FIG. 10, even if the actuator 111 tries to turn in the first turning direction R1 due to a malfunction of the plunger device 113 or the like, The second action part 122B is prevented from turning.

  FIG. 11 is a plan view of the lock switch 101 in a state where the plunger 132 has moved to the front side of the lock switch 101 from the state shown in FIG. In FIG. 11, the emergency notch 103 and the notch spring 103B are omitted. In the state shown in FIG. 10, when a drive pulse is input to the plunger device 113 from the first outlet blade 105A or the second outlet blade 105B by driving an external circuit (not shown), the plunger device 113 causes the plunger 132 to It moves to the front side of the lock switch 101 against the urging force of the plunger spring 133 (see FIG. 6). At this time, the pin 132A of the plunger 132 turns the actuator 111 in the second turning direction R2. The second end portion 112B of the lock pin 112 slides on the bottom portion 124E of the heart cam groove 124 in the circumferential direction R3 from the lower protrusion 124A to the first upper protrusion 124B. Further, when the actuator 111 is turned in the second turning direction R2, the first action part 122A of the action part 122 is separated from the second contact piece 136, and the first contact piece 135 and the second contact piece 136 are not separated from each other, The force to push each other weakens. In addition, when the actuator 111 turns in the second turning direction R2, the third action part 122C of the action part 122 moves the movable contact piece 147 to move the movable contact piece 147 away from the fixed contact piece 146, and the second contact point. Open part 116.

  Returning to FIG. After the plunger 132 moves to the front side of the lock switch 101 by the input of the driving pulse, the plunger spring 133 (see FIG. 6) pushes the plunger 132 to the back side of the lock switch 101. At this time, the pin 132A of the plunger 132 turns the actuator 111 in the first turning direction R1. Further, the second end portion 112B of the lock pin 112 slides on the bottom portion 124E of the heart cam groove 124 in the circumferential direction R3 from the first upper protrusion portion 124B to the locking protrusion portion 124D, or is provided on the bottom portion 124E. Or go down the steps. As a result, the actuator 111 stops without turning in either the first turning direction R1 or the second turning direction R2 (first locked state).

  Here, the lock switch 101 is in the state shown in FIG. 8 (first lock state, initial position), the state shown in FIG. 9, the state shown in FIG. 10 (second lock state, operating position), and the state shown in FIG. Since the engagement protrusion 501 does not come out of the engagement hole 114A (see FIGS. 2 to 5) until the state returns to the state shown in FIG. 8 through the first contact piece 135 and the second contact piece 136, Are in contact with each other, and the first contact portion 115 remains closed. Therefore, every time a drive pulse is input to the plunger device 113 by driving an external circuit (not shown), the lock switch 101 changes from the state shown in FIG. 8 (first lock state, initial position) to FIG. 8 through the state shown in FIG. 10 (second locked state, operating position) and the state shown in FIG. 10 (second locked state, operating position) through the state shown in FIG. The state switching up to the state shown in (1st locked state, initial position) is repeated alternately.

  When the engaging protrusion 501 is pulled out from the hole 102B, the pusher 114 is shown against the rightward biasing by the biasing member (not shown) by an external force or another control means (not shown). 8, the engagement claw 502 and the housing 102 are disengaged, and the engagement protrusion 501 is pulled upward. In order to move the pusher 114 to the left, it is sufficient to weaken the urging force of the urging member (not shown) in the right direction of the pusher 114. When the engaging protrusion 501 is disengaged from the engaging hole 114A (see FIGS. 3 to 5), the pusher 114 is pushed to the left in FIG. 6 by the spring 114B, and the lock switch 101 is in the state shown in FIG. . Since the interference unit 145 pushes the first contact piece 135 to the left to separate the first contact piece 135 and the second contact piece 136 and opens the first contact portion 115, an external circuit (not shown) is driven. However, no drive pulse is input to the plunger device 113.

  As described above, in the lock switch 101 of the present embodiment, when the plunger 132 applies a force to the actuator 111 so as to resist the pulling by the plunger spring 133, the action portion 122 provided in the actuator 111 causes the heart cam groove 124. Is displaced between the initial position corresponding to the first locked state due to the above and the operating position corresponding to the second locked state due to the heart cam groove 124. At this time, the actuator 111 turns around the rotation shaft 121. For this reason, the action part 122 can be moved in a direction different from the direction in which the plunger 132 moves (the input direction of the external force for operating the heart cam mechanism).

  Further, in the lock switch 101 of the present embodiment, the lock switch 101 is in any of the state shown in FIG. 8 (first lock state, initial position) and the state shown in FIG. 10 (second lock state, working position). Even in this case, by pulling the emergency notch 103 to the front side of the lock switch 101, the hook 111A is hooked on the hook portion 122D, and the actuator 111 is forcibly turned in the second turning direction R2. The second contact portion 116 can be opened by moving the movable contact piece 147 away from the fixed contact piece 146 by the third action portion 122C. As a result, even if a malfunction or the like occurs in the plunger device 113 and the plunger 132 does not move, the second contact portion 116 is forcibly opened to stop the current flowing between the second outlet blade 105B and the third outlet blade 105C. be able to.

101 Lock switch 102D Retaining wall (stopper)
DESCRIPTION OF SYMBOLS 111 Actuator 112 Lock pin 112A 1st end part 112B 2nd end part 121 Rotating shaft 122 Action part 124 Heart cam groove 124E Bottom part of heart cam groove 124F Arc-shaped part 133 Plunger spring (elastic body)
R1 First turning direction R2 Second turning direction

Claims (3)

The first pivoting direction and the second pivoting direction opposite to the first pivoting direction are provided by an elastic body. An actuator biased towards one side,
A heart cam groove provided on the actuator, having a heart shape along a turning surface on which the actuator turns, and extending in a vertical direction of the heart shape along the first turning direction;
A first end that is held in a fixed and rotatable manner, and a second end that slidably contacts the bottom of the heart cam groove with pressure and circulates in a predetermined direction along the heart cam groove, A lock pin rotatable around the first end;
With
A force is applied to the actuator so as to resist the urging force of the elastic body, so that the action portion has an initial position corresponding to the first locked state by the heart cam groove and a second position by the heart cam groove. A lock switch that is displaced between the operating position corresponding to the locked state. A stopper that holds the first end of the lock pin and prevents the actuator from moving in the first turning direction;
The lock switch according to claim 1. An arc-shaped portion centering on the rotation axis is formed on the inner surface of the heart cam groove that rises from the bottom of the heart cam groove and contacts the second end of the lock pin.
The lock switch according to claim 1 or 2.

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