JP6668059B2 - switch - Google Patents

Description

  The present invention relates to a switch used for electric equipment, electric appliances, and the like.

  2. Description of the Related Art Switches are used for opening and closing contact points in electrical equipment and the like. For example, the following patent document discloses a switch in which a leaf spring is attached to an operation rod. When the operating rod is pushed in, the leaf spring is elastically deformed. Further, when the force applied to the operation rod is released, the position of the operation rod is returned to the original position by the force of the leaf spring to return to the original position. With this operation, the contact arm attached to the operation rod moves, and the contact portion is opened and closed.

  However, if the leaf spring is plastically deformed due to long-term use of the switch, there is a possibility that the contact portion cannot be opened and closed at a predetermined timing, or the opening and closing itself cannot be performed. In addition, the opening / closing timing may be different due to a difference in performance of each leaf spring. Therefore, there is a demand for a switch which has no individual difference and has good durability.

JP-A-10-144176

  An object of the present invention is to provide a switch with high durability that does not cause individual differences unlike the related art.

  The switch of the present invention includes a housing, a movable shaft, a convex portion, a notch roller, a fixed piece, a movable piece, a fixed contact, and a movable contact. The movable shaft operates in the housing, and the projection also operates accordingly. The notch roller rotates as the position of the projection moves. The operation of the movable shaft causes the movable piece attached to the movable shaft to move toward the fixed piece, and the fixed contact provided on the fixed piece and the movable contact provided on the movable piece close or open.

  The notch roller may include a concave portion into which the convex portion enters. Further, the tip of the projection may be in contact with the recess. The projection moves while the projection remains in the depression, and the notch roller rotates.

  A button connected to the movable shaft or integrated with the movable shaft may be provided. When the button is pressed, the movable axis operates.

  A first pressing portion and a second pressing portion provided on the button, and a pressed portion provided on the movable shaft and disposed between the first pressing portion and the second pressing portion may be provided. The first pressing portion or the second pressing portion presses the pressed portion.

  The button may include an insertion portion formed outside the housing. The button can be pulled out of the housing by inserting a stick or the like into the insertion portion, whereby the contact portion can be peeled off.

  The housing may be formed of a transparent resin. You can see inside the housing.

  According to the present invention, the use of a convex portion, a notch roller, or the like instead of the conventional leaf spring makes it unlikely that individual differences as in the conventional case occur. Since a leaf spring is not used, deterioration over time hardly occurs, and the structure is such that it can be used for a long time.

  Since the convex portion is in the concave portion of the notch roller, the convex portion rotates the notch roller, the convex portion does not cut the notch roller, and the convex portion and the notch roller are hardly deteriorated. In addition, the movable contact can be instantaneously separated from the fixed contact, and the contact portion has good cutting performance.

  Even if the contact portion is welded, the contact portion can be peeled off by inserting a stick or the like into the insertion portion and pulling out the button, thereby ensuring safety. Since the housing is transparent, the inside can be seen and the state of the contact portion can be confirmed.

It is a figure showing composition of a switch of the present invention using an a contact. FIG. 2 is an enlarged view of a button, a movable shaft, a notch roller, and a notch lever in FIG. 1. FIG. 3 is a diagram in which a button is pressed halfway from the state of FIG. 2. It is the figure which pushed the button completely from the state of FIG. It is a figure showing composition of a switch of the present invention using a b contact.

  The switch of the present invention will be described with reference to the drawings. First, a switch using the a contact will be described.

  The switch 10 of the present invention shown in FIG. 1 includes a housing 12, a button 14, a movable shaft 16 connected to the button 14, a convex portion 18 provided on the movable shaft 16, a notch roller 22 provided with a concave portion 20, and a notch roller 22. A notch lever 24, a notch spring 26 for applying a force to the notch lever 24, a fixed contact 29 provided on a fixed piece 28, and a movable contact 31 provided on a movable piece 30 are provided.

  The housing 12 houses the movable shaft 16, the notch roller 22, and the like. The shape of the housing 12 may be changed according to the structure of an electric appliance or electric equipment to be used. The housing 12 may be made of a transparent resin so that the movement of the movable shaft 16 and the opening and closing of the contact portion 32 can be checked. The housing 12 may be colored as long as the state inside the housing 12 can be confirmed.

  The button 14 has a rod shape, and has at least one end 34 protruding outside the housing 12. One end 34 of button 14 can be pushed inward of housing 12. In addition, a space 36 penetrating the button 14 is provided, a part 37 of the housing 12 is arranged in the space 36, and an elastic body 38 is arranged between the button 14 and the part 37 in this space 36. . In the present application, the elastic body 38 uses a coil spring, particularly a compression coil spring, but may be another elastic body. When the button 14 is pressed, the elastic body 38 contracts. When the force is released from the button 14, the elastic body 38 returns to its original state, and the button 14 also returns to its original position.

  A lever 40 for pushing the button 14 is provided outside the housing 12. The lever 40 includes a rod 42 and a rotation shaft 44. The rod 42 rotates about a rotation shaft 44 and pushes one end 34 of the button 14. The method is not limited to the method of pressing the button 14 with the lever 40, and the button 14 may be pressed with a finger or the like without the lever 40.

  The button 14 makes a linear reciprocating motion. A guide 45 for linearly moving the button 14 is provided on the housing 12.

  In the button 14, an insertion portion 46 is provided in a portion that always comes out of the housing 12. The insertion portion 46 may be concave or may penetrate the button 14. When the contact portion 32 is welded and the button 14 does not return to the original position, the contact portion 32 is peeled off by inserting a stick or the like into the insertion portion 46 and moving the button 14 toward the outside of the housing 12. Can be.

  As shown in FIG. 2, the button 14 and the movable shaft 16 are connected via a connecting portion 48. The connecting portion 48 includes a first pressing portion 52 and a second pressing portion 54 provided at the other end 50 of the button 14, and a pressed portion 58 provided at one end 56 of the movable shaft 16. The first pressing portion 52 and the second pressing portion 54 are projections arranged in the movable direction of the button 14, and the pressed portion 58 is a projection disposed between the first pressing portion 52 and the second pressing portion 54. .

  When the button 14 is pressed, the first pressed portion 52 presses the pressed portion 58 in the direction in which the button 14 is pressed. When the button 14 returns to the original position, the second pressing portion 54 presses the pressed portion 58 in the direction in which the button 14 returns.

  The movable shaft 16 can move linearly according to the movement of the button 14. A guide may be provided to move the movable shaft 16 linearly. When the button 14 is pressed, the first pressing portion 52 presses the pressed portion 58 in response to the movement of pressing the button 14, so that the movable shaft 16 is directly operated according to the operation of the button 14.

  When the button 14 returns, the button 14 returns to the original position by the elastic body 38. Therefore, when the movable piece 30 separates from the fixed piece 28, the movable piece 30 can be separated instantaneously, and the breaking ability of the contact portion 32 is high.

  Note that a space 60 other than the pressed portion 58 is provided between the first pressing portion 52 and the second pressing portion 54. This space 60 is for obtaining a stroke when the button 14 is pressed, and the space 60 may be eliminated as necessary.

  The movable shaft 16 has a rod shape, and the pressed portion 58 and the convex portion 18 are provided near one end 56, and the movable piece 30 is provided near the other end 62. The pressed portion 58 faces inward of the movable shaft 16, and the projection 18 projects outward of the movable shaft 16. When the movable shaft 16 moves linearly, the convex portion 18 also moves linearly at the same time.

  The movable shaft 16 is disposed between the two notch levers 24 in the housing 12. The notch roller 22 is rotatably attached to the notch lever 24. The notch roller 22 includes a rotating shaft 64, an outer peripheral portion 66 protruding in the circumferential direction of the rotating shaft 64, and a concave portion 20 provided on the outer peripheral portion 66. The concave portion 20 of the notch roller 22 has the convex portion 18 of the movable shaft 16, and the notch roller 22 rotates according to the movement of the convex portion 18.

  The cross section of the tip of the projection 18 is triangular, and the recess 20 is also triangular. The concave portion 20 is open so as to form an obtuse angle with respect to the convex portion 18. The tip of the convex portion 18 and the innermost portion of the concave portion 20 may be slightly rounded. The convex portion 18 and the concave portion 20 are not limited to triangles, and may have various shapes such as a pointed tip or a rounded tip.

  The rotating shaft 68 is provided on the inner wall of the housing 12, and the rotating shaft 68 is fitted into the concave portion 69 of the notch lever 24. The notch lever 24 is rotatable with respect to the rotation shaft 68, and the notch lever 24 can rotate around the rotation shaft 68 and can move closer to or away from the movable shaft 16. The moving distance of the notch lever 24 changes depending on the depth of the concave portion 20 of the notch roller 22. The shape of the notch lever 24 is not limited as long as the notch lever 24 does not hinder the movement of the movable shaft 16.

  Notch lever 24 rotates within housing 12 as described above. Therefore, the rotary shaft 68 may be provided on the notch lever 24 and the recess 69 may be formed in the housing 12.

  As shown in FIG. 1, the notch spring 26 is provided between the fixed portion 70 in the housing 12 and the notch lever 24. The notch spring 26 includes an elastic body such as a compression coil spring. The notch spring 26 applies a pressing force to the notch lever 24 in the direction of the movable shaft 16. Therefore, pressure is applied from the concave portion 20 to the convex portion 18.

  The stroke of the movable shaft 16 is set to a length that allows the notch roller 22 to rotate in a state where the protrusion 18 enters the recess 20. Then, the protrusion 18 moves with the tip of the protrusion 18 in contact with the recess 20, and the notch roller 22 rotates. Since the convex portion 18 does not slide on the surface of the notch roller 22, there is no possibility that the notch roller 22 is scraped by the convex portion 18, and the durability is improved. The notch roller 22 can follow and move even if the button 14 moves at high speed because the convex portion 18 enters the concave portion 20.

  The contact portion 32 is an a contact composed of a fixed contact 29 provided on the fixed piece 28 and a movable contact 31 provided on the movable piece 30. The fixed piece 28 is attached to the housing 12, and the movable piece 30 is attached to the movable shaft 16. The movable piece 30 is attached so as to cross the movable shaft 16 and protrude to the side of the movable shaft 16. The fixed piece 28 and the movable piece 30 are conductors. The fixed contact 29 and the movable contact 31 face each other, and are formed by attaching a conductor to each of the pieces 28 and 30 or by plating.

  By pressing the button 14, the movable piece 30 moves toward the fixed piece 28, the fixed contact 29 and the movable contact 31 come into contact, and the contact part 32 closes. When the button 14 returns to the original position, the movable piece 30 moves in a direction away from the fixed piece 28, the movable contact 31 separates from the fixed contact 29, and the contact portion 32 opens.

  In FIG. 1, the fixing piece 28 extends to the outside of the housing 12. The fixing piece 28 may be connected to an arbitrary conductor outside the housing 12. Electric facilities and the like can be controlled by opening and closing the contact portions 32. The fixing piece 28 and the conductor may be connected inside the housing 12.

  An arc extinguishing device may be provided near the contact portion 32. The arc extinguishing device is, for example, a magnet. The magnetic flux is passed across the current, the arc generated between the fixed contact 29 and the movable contact 31 is extended, and the arc is extinguished.

  In FIG. 1, a mounting member 72 is provided on the upper part of the housing 12. The attachment member 72 is a member for attaching the switch 10 to a housing or the like. The mounting member 72 can be provided with a hole in the plate so that the mounting member 72 can be screwed to a housing or the like.

  Next, the operation of the switch 10 will be described. It is assumed that the button 14 is not pressed at first and the contact portion 32 is open.

  (1) By pressing the button 14 inward of the housing 12 from the state of FIG. 1, the button 14 moves inward of the housing 12, and the first pressing portion 52 presses the pressed portion 58. The movable shaft 16 also moves in the pushed direction.

  (2) At the same time as the above (1), the convex portion 18 also moves, the convex portion 18 moves the position of the concave portion 20, and the notch roller 22 rotates. At this time, the notch lever 24 moves in a direction away from the movable shaft 16 (FIG. 3), and the notch lever 24 returns to its original position in a state where the protrusion 18 has finished moving (FIG. 4). At this time, a force is applied from the concave portion 20 to the convex portion 18 by the notch spring 26, and a click feeling when the button 14 is pressed is generated.

  (3) By the operations (1) and (2), the movable piece 30 attached to the movable shaft 16 moves toward the fixed piece 28. The movable contact 31 contacts the fixed contact 29, and the contact portion 32 closes.

  (4) When the pressing force of the button 14 is released, the button 14 returns to the original position by the elastic body 38. At this time, the movable shaft 16 is also moved by the second pressing portion 54 pressing the pressed portion 58. The movable shaft 16 also moves in the direction of returning to the original position, that is, in the direction opposite to the above (1).

  (5) The convex portion 18 also moves at the same time as the above (4), and the notch roller 22 rotates as the convex portion 18 moves the concave portion 20. At this time, the notch lever 24 moves in a direction away from the movable shaft 16, and the notch lever 24 returns to the original position in a state where the protrusion 18 has finished moving.

  As described above, according to the present invention, the contact portion 32 can be opened and closed with a structure such as the convex portion 18, the notch roller 22, the notch lever 24, and the notch spring 26 without using a leaf spring as in the related art. Unlike the conventional case, individual differences hardly occur, and the switch 10 having the same performance can be easily manufactured. Further, since there is no breakage of the leaf spring, it can withstand long-term use.

  As mentioned above, although one embodiment was described about the present invention, the present invention is not limited to the above-mentioned embodiment. For example, the contact portion 82 of the switch 80 in FIG. 5 is a b-contact. When the button 14 is not pressed, the fixed contact 29 and the movable contact 31 are in contact with each other. When the button 14 is pressed, the movable contact 31 is separated from the fixed contact 29.

  Since the contact portion 82 is a b-contact, the contact portion 82 can be peeled off by pressing the button 14 even when the contact portion 82 is welded. Therefore, the insertion portion 46 can be omitted.

  The contact portions 32 and 82 of the present invention may have both the a contact and the b contact in one switch 10 or 80.

  Although the button 14 and the movable shaft 16 are connected via the connecting portion 48, the button 14 and the movable shaft 16 may be integrated.

  The notch roller 22 may not have the concave portion 20 and the outer peripheral portion 66 may be circular. However, when the button 14 is moved at a high speed, the projection 18 may cut the outer peripheral portion 66 of the notch roller 22, and may not be able to withstand long-term use. Therefore, it is preferable to apply the present invention to the switches 10 and 80 that move the button 14 at a low speed.

  The notch spring 26 of the above embodiment uses a compression coil as an elastic body, but may be another elastic body. For example, a torsion spring is used as the elastic body. The rotating shaft 68 may be fitted to a torsion spring to obtain a force for pushing the movable shaft 16 in the direction of the movable shaft 16.

  Although the protrusion 18 is only in contact with the recess 20 of the notch roller 22, the protrusion 18 and the notch roller 22 may be connected by a known link mechanism or the like. In this case, the concave portion 20 and the outer peripheral portion 66 may be omitted.

  The number of the protrusions 18 and the notch rollers 22 is not limited to two, and may be changed as appropriate depending on the shape of the housing 12 and the like.

  In addition, the present invention can be practiced in various modified, modified, and changed modes based on the knowledge of those skilled in the art without departing from the gist of the present invention.

10, 80: switch 12: housing 14: button 16: movable shaft 18: convex portion 20: concave portion 22: notch roller 24: notch lever 26: notch spring 28: fixed piece 29: fixed contact 30, movable piece 31: movable contact 32, 82: contact part 34: one end 36 of the button: space penetrating the button 37: part of the housing 38: elastic body 40: lever 42: rod 44: rotating shaft 45: guide 46: insertion part 48: connecting part 50: The other end 52 of the button: the first pressing part 54: the second pressing part 56: the one end of the movable shaft 58: the pressed part 60: the space 62: the other end 64 of the movable shaft 64: the rotating shaft 66 of the notch roller: the outer peripheral part 68: the housing Rotating shaft 69 of the inner wall: Notch lever concave portion 70: Housing fixing portion 72: Mounting member

Claims (6)

A housing,
A movable shaft that can move within the housing;
A convex portion provided on the movable shaft,
With a recess in which the protrusion enters, the protrusions are in contact, and Notchirora rotatable,
A notch lever rotatably mounted with the notch roller,
An elastic body that applies a pressing force to the notch lever in the direction of the movable shaft,
A fixing piece attached to the housing,
A movable piece attached to the movable shaft,
A fixed contact provided on the fixed piece,
A movable contact provided on the movable piece,
With switch. The switch according to claim 1 , wherein a tip of the convex portion contacts the concave portion. The switch according to claim 1 or 2 , further comprising a button connected to the movable shaft or integrated with the movable shaft. A first pressing portion and a second pressing portion provided on the button,
A pressed portion provided on the movable shaft and disposed between the first pressing portion and the second pressing portion;
The switch according to claim 3 , comprising: In the button switch according to claim 3 or 4 having a spigot formed in the outer than the housing. Either switch claims 1-5, wherein the housing is made of a transparent resin.

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