JP2012089253A - Switch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch device having a lock mechanism of a switch operating portion, which comprises durability and a mechanism capable of forcibly releasing a locking state.SOLUTION: A switch device is composed of a wafer 15 having a terminal portion 15d and a fixed contact portion 15e; a switch operating body 5 which can be vertically moved by receiving pressing operation and is formed with a first ratchet tooth 5e; a cam follower 6 capable of vertically moving and rotating, formed with a second ratchet tooth 6e, and having a first cam portion 6f; a moving contact 12 contacting/separating to/from the fixed contact portion 15e; and a case 9 equipped with a rotation regulating portion 9d and a locking portion 3c. The switch device having a ratchet mechanism capable of switching a locking state in which the switch operating body 5 is locked and a releasing state in which the locking is released, comprises a forcibly lock releasing mechanism capable of forcibly releasing the locking state, without operating the switch operating body 5.

Description

  The present invention relates to a switch device used for switching various functions in various electronic devices, and in particular, by switching the contact operation by pressing the switch operation unit and switching between the locked state and the released state of the switch operation unit. The present invention relates to a switch device having a mechanism capable of switching and forcibly releasing the lock state in addition to the switch operation unit.

The switch device is attached to, for example, a control panel of an automobile, and is used for setting conditions such as in-vehicle temperature setting and air-conditioning air blowing location selection. When combining various conditions and there is a combination that must be reliably released from the locked state, it is used for mechanically operating the release mechanism on the automobile side when the combination is achieved.
Therefore, separately from the switch operation unit, the switch device has a forced unlocking mechanism that switches to the release state when operated when the switch operation unit is in the locked state and maintains the release state as it is when operated when the switch operation unit is in the released state. Is required.

  As a conventional switch device having a mechanism capable of forcibly releasing the lock state, a switch device described in Patent Document 1 is known. This will be briefly described with reference to FIGS. Although the lock and release operations are not described in detail, the switch operating body 100 is locked and released using a heart cam mechanism, and the switch operating body 100 is locked and released every time the switch operating unit 100a is pressed. This is a switch device in which the state is alternately switched and the connection state of the contact is switched.

  The forced lock state can be released by pressing the pressing portion 110a of the driving body 110. FIG. 20A is a diagram illustrating a locked state of the switch operation body 100. At this time, when the pressing portion 110 a of the driving body 110 is pressed, the taper portion 110 b provided at the opposite end of the pressing portion 110 a of the driving body 110 and the taper portion 100 c provided on the slide portion 100 b of the switch operating body 100 come into contact with each other. Then, by further pressing, the tapered portion 100c is pushed downward as shown in FIG. 20B, and the switch operating body 100 moves in the same manner as when the switch operating portion 100a is pressed, and the lock is released.

  FIG. 21A is a diagram illustrating a state in which the switch operating body 100 is unlocked. At this time, when the driving body 110 is pressed, the tapered portion 110b is inserted into the recess 100d provided in the slide portion 100b as shown in FIG. 21B, but the switch operating body 100 is interlocked with the movement of the driving body 110. The released state of the switch operating body 100 is maintained, and the locked state is never entered.

JP 2000-251571 A

  Patent Document 1 describes a switch device having a mechanism capable of forcibly releasing a locked state in a switch device using a heart cam mechanism for locking and releasing a switch operation unit.

  Here, the mechanism for forcibly releasing the lock state described in Patent Document 1 has an operation unit for forcibly releasing separately from the normal switch operation unit. However, in practice, the lock release operation is performed by pushing the switch operation unit and driving the heart cam mechanism.

  Since the heart cam mechanism slides a thin pin in a narrow groove, there is anxiety about durability such as wear and deformation, and there is a concern that it will not operate. The ratchet mechanism that can obtain the same effect as the heart cam mechanism is driven by the meshing of the cams, and is therefore more durable than the heart cam mechanism. However, a switch device using a ratchet mechanism has not been known as a switch device having a mechanism that can forcibly release a locked state as in Patent Document 1.

  In Patent Document 1, the drive body 110 is pressed and brought into contact with the switch operation body 100, and the switch operation body 100 is moved in a direction perpendicular to the pressing direction via the taper portion 110b and the taper portion 100c. A strong force is required to move it. In addition, since the pressing force is applied from the direction perpendicular to the moving direction of the switch operating body 100, the switch operating body 100 may be inclined and may not operate smoothly.

  When used in an automobile or the like and operated automatically, the operation load is heavy and an operation error may occur if the operation is not smooth.

  An object of the present invention is to solve the above-described problems and to provide a switch device having a durability and a mechanism capable of forcibly releasing a locked state.

  The present invention relates to a wafer having a terminal portion and a fixed contact portion connectable to the outside, a switch operation in which a first ratchet tooth is formed in a circular shape while being able to move up and down in response to a pressing operation from the outside. And a cam follower having a first cam portion formed so as to mesh with the first ratchet teeth, and a vertical movement of the switch operating body. A movable contact that contacts and separates from the fixed contact portion, a rotation restricting portion that guides the first cam portion, and a lock portion that can lock the movement of the first cam portion. The switch operating body can be operated to switch between a locked state in which the first cam portion and the lock portion are engaged and a released state in which the engagement between the first cam portion and the lock portion is released. With a ratchet mechanism In pitch device, the locked state, without operating the switch operating body, has a feature of having a forced unlocking mechanism can be released forcibly.

  As a result, it has a mechanism that is durable and can be forcibly released by locking the switch operation part using a ratchet mechanism that is driven by cam engagement and is unlikely to wear or deform. A switch device can be provided.

  Further, the present invention is characterized in that the case is provided with a locking member that is movable up and down, and the locking member has the lock portion.

  Thus, by making the lock part separate from the case, the lock part can be moved and unlocked, and the forced unlocking mechanism can be easily configured without complicating the component configuration. .

In the present invention, the forced lock release mechanism includes a release operation body arranged to be movable,
A second cam portion provided in the case; a drive member having a third cam portion that engages with the second cam portion; and a movable member that is movably disposed; When the release operation body is pressed, the locking member moves upward via the second cam portion, the third cam portion, and the drive member. The locked state is released.

  As a result, the locking member is moved upward by the rotation of the driving member to release the locked state, so that the locked state can be released with a light operating force, and the locked state can be released more reliably. There is an effect.

  Further, the present invention is characterized in that the forced lock release mechanism is provided with an urging member that urges in a direction against a pressing force by the pressing operation of the release operation body.

  Thereby, there is an effect that the release operation body is always arranged at the initial position, and the lock can be released only when the release operation is performed.

  Further, according to the present invention, the drive member has a base portion formed in an annular shape, the third cam portion is provided on a lower surface side of the base portion, and the locking member has a base portion formed in an annular shape. A plate-like stopper extends downward from the inner surface side of the base portion, a cylindrical portion having a notch is formed in the case, and the second cam is provided along the outer surface of the cylindrical portion. The drive member is disposed so that an inner surface of the drive member engages with the cylindrical portion, and the third cam portion and the second cam portion engage with each other, and the stopper of the locking member is provided in the notch of the case. And is arranged so as to engage the locking member and the driving member.

  As a result, the inner surface of the drive member and the cylindrical portion engage with each other, so that the drive member rotates smoothly and can move smoothly up and down. In addition, the locking member has an effect of being able to smoothly move in the vertical direction while restricting the rotational motion by inserting a stopper into the notch.

  Further, the present invention is characterized in that the second cam portion and the third cam portion are the same number and are provided at equal intervals in three or more places.

  As a result, the drive member moves up and down horizontally without tilting, so that the forced unlocking movement becomes smooth and the forced unlocking can be performed more reliably.

  Further, the present invention is characterized in that the driving member is accommodated in the wafer.

  As a result, it is difficult for dust to enter from the outside, the operation is smooth, and stable forcible unlocking can be performed.

  The switch device of the present invention has an effect that it is durable and can provide a switch device having a mechanism capable of forcibly releasing the locked state.

It is a perspective view which shows the switch apparatus of embodiment. It is a disassembled perspective view which shows the component of the switch apparatus of embodiment. It is a section schematic diagram showing the structure of the switch device of an embodiment. It is a figure which shows the switch operation body 5 of a component. It is a figure which shows the cam follower. It is a figure which shows the retaining member 10 of a component. It is a figure which shows the operation member 11 of a component. It is a figure which shows the movable contact 12 of a component. It is a figure which shows case 9 of a component. It is a figure which shows the wafer 15 of a component. It is a figure which shows the cancellation | release operation body 13 of a component. It is a figure which shows the spacer 2 of a component. It is a figure which shows the latching member 3 of a component. It is a figure which shows the drive member 4 of a component. It is a figure which shows the attachment plate 1 of a component. It is a figure which shows the engagement relationship of case 9, the locking member 3, and the drive member 4. FIG. It is a figure which shows operation | movement of the 1st ratchet tooth | gear 5e, the 2nd ratchet tooth | gear 6e, and the 1st cam part 6f. It is a figure which shows operation | movement of the locking mechanism of the switch apparatus of embodiment. It is a figure which shows operation | movement of the forced lock release mechanism of the switch apparatus of embodiment. It is a figure which shows operation | movement of the locking mechanism of the conventional switch apparatus. It is a figure which shows operation | movement of the forced lock release mechanism of the conventional switch apparatus.

  Hereinafter, the switch device according to the embodiment of the present invention will be specifically described. However, the present invention is not limited to the following embodiment, and various modifications can be made without departing from the scope of the invention. It is.

[First Embodiment]
Hereinafter, a first embodiment in which the switch device of the present invention is embodied will be described with reference to FIGS. FIG. 1 is a perspective view illustrating a switch device according to an embodiment. FIG. 2 is an exploded perspective view of the switch device according to the embodiment. FIG. 3 is a schematic cross-sectional view of the switch device of the embodiment.

  As shown in FIG. 1, the switch device according to the present embodiment is generally formed in a shape in which a cylinder is stacked on a rectangular parallelepiped, and as shown in FIG. Stop member 10, case 9, second coil spring (return spring) 8, first coil spring 7, cam follower 6, switch operation body 5, drive member 4, locking member 3, spacer 2, release operation body 13, A third coil spring (biasing member) 14 is incorporated, and the upper surface and side surfaces of the wafer 15 are covered with the mounting plate 1. As shown in FIG. 3, the switch operating body 5 protrudes from the upper surface of the wafer 15, and the first coil spring 7 and the second coil spring 8 are arranged between the lower side of the switch operating body 5 and the wafer 15. Has been. Further, a release operation body 13 is disposed on one side (left side in the figure) of the switch operation body 5.

  Hereinafter, each component will be described with reference to FIGS. 2 and 4 to 15.

  As shown in FIG. 4, the switch operating body 5 is made of a resin material and is generally formed in a shape in which a rectangular parallelepiped is attached to a cylinder. Here, the direction with the cylindrical shape is the downward direction, and the direction with the rectangular parallelepiped shape is the upward direction.

  The switch operating body 5 has an open bottom surface, and has an outer cylindrical portion 5a having a hollow interior, a substantially rectangular parallelepiped shaped switch operating portion 5b protruding upward from the center of the top surface of the outer cylindrical portion 5a, and an outer cylindrical portion 5a. Has a penetrating shaft 5c projecting downward on an extension line of the switch operating portion 5b, and a leg portion 5d projecting outward in an L shape every 90 ° from the peripheral edge of the lower end of the outer cylinder portion 5a.

  Moreover, the 1st ratchet tooth | gear 5e which consists of eight crests and troughs at equal intervals along the periphery is formed in the lower end surface of the outer cylinder part 5a.

  As shown in FIG. 5, the cam follower 6 is formed of a resin material in a generally cylindrical shape, and has a shape protruding in an annular shape outward from a peripheral edge portion at one end. Here, a direction having a shape protruding in an annular shape is a downward direction, and the opposite direction is an upward direction.

  The cam follower 6 has an open bottom surface, a hollow inner cylinder portion 6a, and a concave shape formed inside the outer cylinder portion 6a from the center of the upper surface of the outer cylinder portion 6a. A circular opening 6g is formed on the bottom surface portion. The inner cylinder part 6b which has this, and the collar part 6c which protruded in the annular | circular shape outward from the outer peripheral part of the outer cylinder part 6a.

  Further, the cam follower 6 has two notch-shaped operating portion guide grooves 6d at positions facing the inner peripheral surface of the flange portion 6c.

  Further, the cam follower 6 has second ratchet teeth 6e composed of six crests and troughs along the circumference on the upper surface of the flange portion 6c. It is arranged one by one.

  The cam follower 6 has a first cam portion 6f whose upper surface is an inclined surface on the outer peripheral surface of the flange portion 6c, and is arranged to protrude outward at four equal intervals.

  As shown in FIG. 2, the first coil spring 7 is a coil spring formed of a metal wire in a generally cylindrical shape.

  As shown in FIG. 6, the retaining member 10 is formed of a metal plate and is formed in a disk shape. The retaining member 10 has a through hole 10a in the center. The outer diameter of the retaining member 10 is larger than the diameter of the opening 6g of the cam follower 6.

  As shown in FIG. 7, the actuating member 11 is generally formed in a disk shape from a resin material. The actuating member 11 has a circular through hole 11a, two cylindrical movable contact fixing portions 11c, and two arm portions 11b each having a T-shaped retaining portion 11d formed at the tip. The through hole 11a is formed at the center of the actuating member 11, and a movable contact fixing part 11c and an arm part 11b project in the direction perpendicular to the surface around the through hole 11a. The straight line connecting the arm portions 11b and the straight line connecting the movable contact fixing portions 11c intersect at a right angle at the center of the through hole 11a, and the arm portion 11b is formed on the back surface of the surface having the movable contact fixing portion 11c.

  As shown in FIG. 8, the movable contact 12 is generally formed in an annular shape by a metal plate. The movable contact 12 is formed with two circular positioning holes 12a and two semi-annular movable contact portions 12b. The positioning hole 12a is disposed at a point-symmetrical position with respect to the center point of the movable contact 12, and the movable contact portion 12b is disposed at a point-symmetrical position with respect to the central point of the movable contact 12, and connects the positioning holes 12a. The straight line connecting the straight line and the movable contact portion 12b is orthogonal.

  The movable contact 12 is generally formed into a shape that is slightly bent in the direction in which the movable contact portion 12b protrudes around a straight line connecting the positioning holes 12a, and has a biasing force.

  As shown in FIG. 2, the second coil spring 8 is a coil spring formed of a metal wire in a generally cylindrical shape. The biasing force of the second coil spring 8 is larger than the biasing force of the first coil spring 7.

  As shown in FIG. 9, the case 9 is formed of a resin material in a shape in which a cylinder is generally stacked on a rectangular parallelepiped, and a cylindrical hollow portion 9 a penetrating from the cylindrical portion 9 f to the rectangular parallelepiped portion 9 g. have. Here, the direction in which the cylindrical portion 9f is present is defined as the upward direction, and the direction in which the rectangular parallelepiped portion 9g is defined as the downward direction.

  On the inner peripheral surface of the hollow portion 9a, a switch operating body guide groove 9b for guiding the vertical movement of the switch operating body 5 and a locking member guide groove 9c (for cutting) for guiding the vertical movement of the locking member 3 are provided. And a rotation restricting portion 9d that is an inclined surface that guides the movement of the cam follower 6 in the vertical direction and the rotational direction. As shown in FIG. 9C, when the case 9 is viewed from below, the switch operating body guide groove 9b, the locking member guide groove 9c, and the rotation restricting portion 9d are in the range of 90 ° in the clockwise direction. 4 are formed in each of the hollow portions 9a.

  A second cam portion 9e having an inclined surface on the upper surface is formed at each central portion of the four sides of the upper surface of the rectangular parallelepiped portion 9g of the case 9. As shown in FIG. 9A, the slope of the second cam portion 9e has a slope that becomes higher as it goes in the clockwise direction when the case 9 is viewed from the upper surface side.

  As shown in FIG. 10, the wafer 15 is formed of a resin material in a generally rectangular parallelepiped shape, the inside is hollow, and one surface is open. Here, the direction with the open surface is the upward direction, and the opposite direction is the downward direction.

  In addition, an opening 15a is provided on one side surface, and a case positioning recess 15b is provided on the inner bottom surface. Further, two side surfaces each having two inclined protrusions 15c are provided on both side surfaces in contact with the surface having the opening 15a.

  Further, two terminal portions 15d formed in a crank shape with a metal plate on the side surface having the opening 15a and the side surface opposite to the side surface of the wafer 15 protrude to the outside.

  Further, a fixed contact portion 15e formed of a metal plate and extending with a terminal portion 15d is exposed on the bottom surface portion of the case positioning recess 15b.

  The release operating body 13 is integrally formed of a resin material as shown in FIG. The release operation body 13 includes a plate-like release operation portion 13a, a drive portion 13b that is a rectangular recess, and a cylindrical coil spring fixing portion 13c.

  As shown in FIG. 11b, the release operation body 13 has a plate-like release operation portion 13a extending on one side (right side in the figure) of the drive portion 13b, and the release operation portion 13a on the lower surface side of the drive portion 13b. Is provided with a coil spring fixing portion 13c.

  As shown in FIG. 2, the third coil spring 14 that is an urging member is a coil spring formed of a metal wire in a generally cylindrical shape.

  As shown in FIG. 12, the spacer 2 is formed in a generally annular shape with a metal plate. The spacer 2 has two pressing portions 2a formed in a semi-cylindrical shape. One pressing portion 2 a is provided at a point-symmetrical position around the center point of the spacer 2. In addition, the spacer 2 is orthogonally shaped to a straight line connecting the pressing portions 2a, and is shaped into a shape that is slightly bent in the direction in which the pressing portion 2a protrudes around a straight line that passes through the center point of the spacer 2. Has a biasing force.

  As shown in FIG. 13, the locking member 3 is generally formed in an annular shape from a resin material. The locking member 3 has a plate-like stopper 3a having an inclined surface at the tip and an annular base 3b. Four stoppers 3a are arranged at equal intervals on the inner surface of the base portion 3b, and protrude in a direction perpendicular to the flat surface of the base portion 3b.

  The stopper 3a is capable of stopping the movement of the cam follower 6 by coming into contact with the first cam part 6f, and an inclined surface 3d that comes into contact with the first cam part 6f and guides the movement of the cam follower 6. And a cam follower guide surface 3e that contacts the first cam portion 6f and guides the movement of the cam follower 6.

  Here, a direction in which the stopper 3a protrudes is a downward direction, and a direction in which the base 3b is present is an upward direction. When the stopper 3a is viewed from the outer peripheral side, the lock portion 3c is at the lower end of the right side surface of the stopper 3a, and the cam follower guide surface 3e is the left side surface of the stopper 3a. The inclined surface 3d is at the lower end of the stopper 3a, and is a surface having a predetermined angle with respect to the base 3b, and the right side is lower than the left side.

  As shown in FIG. 14, the drive member 4 is formed in a generally annular shape with a resin material. The drive member 4 includes four rod-shaped arm portions 4a projecting outward from the outer peripheral surface, four flat cam surfaces formed at regular intervals along the circumference, a sloped third cam portion 4b, and an annular shape. It has a base 4c.

  As shown in FIG. 15, the mounting plate 1 is a metal plate and is formed in a shape in which both ends of a generally rectangular plate are bent 90 ° in the same direction. Here, the direction in which both ends are bent is the downward direction, and the opposite direction is the upward direction. The mounting plate 1 has a circular operation portion hole 1a on the upper surface and a pair of rectangular cutout portions 1b on both side surfaces.

  Next, engagement of each component of the switch device of this embodiment will be described with reference to FIGS. 3 and 16. FIG. 16 is a diagram showing an engagement relationship among the case 9, the locking member 3, and the drive member 4, and other components are not shown for easy understanding of the engagement relationship.

  The first coil spring 7 is disposed in the inner cylindrical portion 6b of the cam follower 6, the through shaft 5c of the switch operating body 5 is inserted into the first coil spring 7 and the opening 6g of the cam follower 6, and the switch operating body 5 is The cam follower 6 is put on and a retaining member 10 is fixed to the tip of the through shaft 5c.

  The urging force of the first coil spring 7 urges the switch operating body 5 and the cam follower 6 in directions away from each other, but does not fall off by the retaining member 10, and the first coil spring 7 moves in the expansion / contraction direction. Rotational movement is also possible.

  The first ratchet teeth 5e of the switch operating body 5 and the second ratchet teeth 6e of the cam follower 6 are arranged to face each other.

  Next, the movable contact fixing portion 11 c of the operating member 11 is inserted into the positioning hole 12 a of the movable contact 12, and the movable contact 12 is fixed to the operating member 11. Thereby, the actuating member 11 and the movable contact 12 can operate integrally.

  Next, the second coil spring 8 is disposed between the outer cylindrical portion 6a and the inner cylindrical portion 6b of the cam follower 6, the arm portion 11b of the operating member 11 is engaged with the operating portion guide groove 6d of the cam follower 6, and the second The second coil spring 8 is held between the cam follower 6 and the operating member 11. The cam follower 6 and the actuating member 11 are biased in directions away from each other by the biasing force of the second coil spring 8, but the retaining portion 11 d of the actuating member 11 engages with the actuating portion guide groove 6 d of the cam follower 6. It is held without falling off. The cam follower 6 and the actuating member 11 can be individually moved in the extending / contracting direction of the second coil spring 8, but the rotating operation is performed in conjunction with each other.

  Thereby, the switch operating body 5, the cam follower 6 and the operating member 11 can freely move in the vertical direction, respectively, and the cam follower 6 and the operating member 11 rotate in conjunction with each other.

  Next, the integrated switch operating body 5, cam follower 6, first coil spring 7, second coil spring 8, actuating member 11 and movable contact 12 are connected, and the leg 5 d of the switch operating body 5 is connected to the case 9. The switch operating body 5 is inserted into the switch operating body guide groove 9b and disposed in the hollow portion 9a of the case 9 so that the switch operating section 5b of the switch operating body 5 protrudes from the cylindrical portion 9f of the case 9.

  Thereby, the switch operating body 5 is guided by the switch operating body guide groove 9b and can be moved in the vertical direction, but the rotation operation is restricted. Further, when the first cam portion 6f is in sliding contact with the rotation restricting portion 9d, the cam follower 6 is held so as to be able to move up and down and rotate along the rotation restricting portion 9d.

  The case 9 in which the switch operating body 5, the cam follower 6, the first coil spring 7, the second coil spring 8, the operating member 11, and the movable contact 12 are enclosed in the hollow portion 9a has the movable contact 12 and the fixed contact portion 15e. It arrange | positions in the case positioning recessed part 15b of the wafer 15 so that it may oppose.

  Thereby, the movable contact 12 and the fixed contact portion 15e can come into contact with each other, and the connection state between the movable contact 12 and the fixed contact portion 15e is switched as the movable contact 12 rotates.

  The release operation body 13 is disposed in the wafer 15 adjacent to the case 9 with the release operation portion 13 a protruding from the opening 15 a of the wafer 15 to the outside. The third coil spring 14 is attached to the coil spring fixing portion 13 c and is held between the inner wall of the wafer 15 and the release operation body 13.

  The urging force of the third coil spring 14 acts in a direction against movement due to the pressing operation of the release operation body 13, and when the pressing operation to the hall operation body 13 is released, the release operation body 13 is pressed. Return to the original position before the start.

  As shown in FIG. 16A, the drive member 4 has the cylindrical portion 9f of the case 9 passed through the base portion 4c, the arm portion 4a is accommodated in the drive portion 13b of the release operation body 13, and the third cam portion 4b and the case 9 is arranged on the case 9 so as to face the second cam portion 9e. The drive member 4 is arranged so as to be able to rotate. When the drive member 4 rotates, the third cam portion 4b of the drive member 4 slides on the second cam portion 9e of the case 9 and moves up and down. By arranging the second cam portion 9e and the third cam portion 4b at equal intervals in the circumferential direction, the driving member 4 and the locking member 3 can be kept in a horizontal state and smoothly moved up and down. .

  As shown in FIG. 16A, the locking member 3 is inserted in the locking member guide groove 9c of the case 9 so that the cylindrical portion 9f of the case 9 passes through the base portion 3b and moves in the direction of arrow A. And disposed on the driving member 4. The locking member 3 can move up and down, but the rotational movement is restricted by the locking member guide groove 9 c and moves in the vertical direction in conjunction with the movement of the drive member 4.

  As shown in FIG. 16B, the stopper 3a of the locking member 3 moved in the direction of the arrow A is disposed side by side with the rotation restricting portion 9d. It protrudes in the direction of arrow A from the slope. Therefore, it is possible to engage with the first cam portion 6f of the cam follower 6 shown in FIG. 5 that has been guided and moved by the rotation restricting portion 9d, and to stop the movement of the cam follower 6.

  The spacer 2 is disposed on the locking member 3 so that the cylindrical portion 9f of the case 9 passes through the base portion 4c and the pressing portion 2a contacts the locking member 3.

  The mounting plate 1 is disposed on the wafer 15 through the switch operation portion 5b through the operation portion hole 1a, and is fixed by snap-fitting the notch portion 1b to the projection portion 15c. As a result, the spacer 2 is held between the mounting plate 1 and the locking member 3, and the locking member 3 is biased toward the drive member 4 by the biasing force. Thereby, the play of the components accommodated in the wafer 15 is suppressed, and a smooth operation becomes possible.

  Next, the operation of the ratchet mechanism will be described.

  When the switch operating portion 5b is pressed in a direction against the urging force of the second coil spring 8 and then the operating force is released, the urging force of the second coil spring 8 causes the switch operating portion 5b to perform a self-reset operation. do. The ratchet mechanism regulates and locks the operation of the switch operation portion 5b by restricting the movement of the first cam portion 6f that moves in conjunction with the operation of the switch operation portion 5b.

Hereinafter, details of the movement of the ratchet mechanism will be described with reference to FIGS. 17 and 18.
FIG. 17 is a schematic operation diagram showing the movement of the first ratchet teeth 5e, the second ratchet teeth 6e, and the first cam portion 6f when the switch operation portion 5b is pressed.

  FIG. 17A shows the first ratchet teeth 5e, the second ratchet teeth 6e, the first cam portion 6f, and the rotation restricting portion 9d in a state (initial position) before the switch operation portion 5b is pressed. It is a positional relationship figure which shows a positional relationship. FIG. 17B shows the positional relationship between the first ratchet teeth 5e, the second ratchet teeth 6e, the first cam portion 6f, and the rotation restricting portion 9d when FIG. 17A is viewed from the right side. FIG.

  FIG. 17C shows the positional relationship between the first ratchet teeth 5e, the second ratchet teeth 6e, the first cam portion 6f, and the rotation restricting portion 9d in a state where the switch operating portion 5b is pushed to the end of the operation range. FIG. FIG. 17D shows the positional relationship between the first ratchet teeth 5e, the second ratchet teeth 6e, the first cam portion 6f, and the rotation restricting portion 9d when FIG. 17C is viewed from the right side. FIG.

  Next, FIG. 18A is a schematic diagram illustrating the start of movement of the first cam portion 6f that moves in conjunction with the self-return operation of the switch operation portion 5b. FIG. 18B is a schematic view when the first cam portion 6 f comes into contact with the lock portion 3 c of the locking member 3. FIG. 18C is a schematic view showing the movement of the first cam portion 6f when the lock is released.

  In the state before pressing the switch operating portion 5b, the first ratchet teeth 5e and the second ratchet teeth 6e are not in contact with each other as shown in FIG. It is arranged in the state.

  When the switch operating portion 5b is pressed, as shown in FIG. 17A, the switch operation portion 5b moves in the direction of the arrow D1 without changing the positional relationship between the first ratchet teeth 5e and the second ratchet teeth 6e.

  When the switch operating portion 5b is pushed to the end of the operation range, as shown in FIG. 17C, the first ratchet teeth 5e and the second ratchet teeth 6e come into contact with each other in a state where the peaks of the ratchet teeth are slightly shifted. After the contact, the rotatable cam follower 6 rotates in the arrow D2 direction until the teeth of the first ratchet teeth 5e and the second ratchet teeth 6e mesh with each other.

  In conjunction with the rotation of the cam follower 6, the first cam portion 6f also rotates in the direction of the arrow D2 and moves to a position as shown in FIG. When the pressing force applied to the switch operating portion 5b is released, the first cam portion 6f moves in the direction of arrow D3 in conjunction with the movement of the cam follower 6, and can come into contact with the rotation restricting portion 9d of the case 9.

  When the switch operating portion 5b starts the self-returning operation, the first cam portion 6f comes into contact with the rotation restricting portion 9d of the case 9 during the movement as shown in FIG. The movement starts in the direction of arrow D4 while sliding.

  As shown in FIG. 18B, the first cam portion 6f that has moved in the direction of the arrow D4 while slidingly contacting the rotation restricting portion 9d is a lock portion 3c of the locking member 3 that is connected to the rotation restricting portion 9d. The cam follower 6 stops the self-returning operation. When the cam follower 6 stops operating, the switch operating body 5 (switch operating unit 5b) that moves in conjunction with the cam follower 6 also stops the self-returning operation. This state is a locked state.

  When in the locked state, the locked state can be released by pressing the switch operating portion 5b again in the direction against the urging force of the second coil spring 8. When the switch operation portion 5b is pressed again, as shown in FIG. 18C, the first cam portion 6f moves in the direction of the arrow D5 in conjunction with the movement of the switch operation portion 5b, and the first cam portion The engagement between 6f and the lock portion 3c is released.

  When the switch operating portion 5b is pushed to the end of the operation range, the first ratchet teeth 5e and the second ratchet teeth 6e are engaged with each other as shown in FIG. 17C, and the lock is released by rotating in the direction of the arrow D6. . Thereafter, the first cam portion 6f moves in the direction of arrow D7, abuts against the stopper 3a, moves in the direction of arrow D8 while sliding on the inclined surface 3d and the cam follower guide surface 3e, and interlocks with the movement of the cam follower 6. The switch operating body 5 (switch operating unit 5b) also performs self-return and returns to the initial position.

  Next, the forced lock release mechanism will be described with reference to FIG.

  FIG. 19A is a schematic operation diagram when the movement when the forced unlocking is performed is viewed from the upper surface side of FIG. FIG. 19B is a schematic operation diagram of the movement when forced unlocking is performed as viewed from the side of FIG. 1, and the first cam portion 6f contacts the lock portion 3c. Indicates locked state. FIG. 19C is a schematic operation diagram when the movement of the first cam portion 6f after the drive member 4 rotates in the direction of the arrow D2 is viewed from the side surface of FIG.

  Forcible unlocking can be performed by pressing the release operating portion 13a in the direction of the arrow D9 against the urging force of the third coil spring 14, as shown in FIG. When the release operation portion 13a is pressed in the direction of arrow D9, the release operation body 13 moves in the direction of arrow D9, the drive portion 13b and the arm portion 4a of the drive member 4 come into contact, and the arm portion 4a is pressed in the direction of arrow D10. The drive member 4 rotates in the direction of arrow D10 in FIGS. 19 (a) and 19 (b).

  When the driving member 4 rotates in the direction of the arrow D10, the third cam portion 4b of the driving member 4 and the second cam portion 9e of the case 9 are in sliding contact, and the driving member 4 rotates in the direction of the arrow D10, and the second It moves also in the direction of arrow D11 along the slope of the cam portion 9e.

  In conjunction with the movement of the driving member 4 in the direction of the arrow D11, the locking member 3 also moves in the direction of the arrow D11. When the locking member 3 moves in the direction of the arrow D11, the stopper 3a also moves in the direction of the arrow D11, the engagement between the lock portion 3c and the first cam portion 6f is released, and the lock is released.

  After unlocking, the first cam portion 6f moves in the direction of arrow D12 along the inclined surface 3d, and the switch operation portion 5b returns to the initial position without operating the switch operation portion 5b.

  Further, when the forced unlocking operation is performed in the unlocked state, the locking member 3 operates in conjunction with the movement of the unlocking operation body 13 as described above, but the connection between the movable contact 12 and the terminal member 16 is performed. The state does not change and the unlocked state is maintained.

  This makes it possible to provide a switch device having a mechanism that is more durable than a switch using a heart cam and that can forcibly release the locked state.

  In addition, since the locking portion 3c is a separate locking member 3 from the case 9, the locking portion 3c can be easily released by an operation of moving the locking portion 3c upward, without complicating the component configuration. There is an effect that the forced unlocking mechanism can be easily configured.

  In addition, as a biasing member that biases in a direction against the pressing force of the pressing operation of the release operation body 13, the biasing direction of the third coil spring 14 and the pressing operation direction of the release operation body 13 are arranged at positions facing each other. As a result, the release operation body 13 is less likely to be inclined with respect to the moving direction, and has the effect of being smoothly placed at the initial position.

  In addition, since the number of the second cam portions 9e and the third cam portions 4b is four, the driving member 4 is less inclined than when the number of the three cam portions 9e and the third cam portions 4b is three. Further, the inclination angle of the second cam portion 9e and the third cam portion 4b is gentle as compared with the case where the number of arrangements is five or more, and can smoothly slide. Therefore, the forced unlocking movement becomes smooth, and there is an effect that the forced unlocking can be performed more reliably.

  In addition, since the release operation body 13 seals the opening 15a of the wafer 15 except during the forced lock release operation, it is difficult for dust to enter from the outside, the operation is smooth, and stable forced lock release can be performed. There is an effect.

In addition, this invention is not limited to the said embodiment, For example, it can deform | transform and implement as follows, These embodiments also belong to the technical scope of this invention.
(1) In the above embodiment, the locking member 3 and the driving member 4 are rotated up and down using a cam. However, the inner wall of the base portion 4c of the driving member 4 and the outer periphery of the cylindrical portion 9f of the case 9 are threaded. It may be rotated up and down.
(2) In the above embodiment, the release operation portion 13a is operated and the locking member 3 is rotated up and down via the driving member 4, but the driving member 4 is operated or the direct locking member 3 is moved directly. It is good also as a structure of operating.
(3) In the above embodiment, the third cam portion 4b of the driving member 4 and the second cam portion 9e of the case 9 are provided at four locations, respectively, but it is only necessary to operate smoothly and have three or more locations.
(4) In the above embodiment, the release operation body 13 is pressed to return the forced lock release mechanism to the initial position. However, for example, a method of incorporating the biasing member into the drive member 4 to return to the initial position may be used. .

DESCRIPTION OF SYMBOLS 1 Mounting plate 1a Operation part hole 1b Notch part 2 Spacer 2a Press part 2b Hollow part 3 Locking member 3a Stopper 3b Base part 3c Lock part 3d Inclined surface 3e Cam follower guide surface 4 Drive member
4a Arm part 4b Third cam part 4c Base part 5 Switch operation body
5a outer cylinder part 5b switch operation part 5c penetrating shaft 5d leg part 5e first ratchet teeth 6 cam follower 6a outer cylinder part 6b inner cylinder part 6c collar part 6d actuating part guide groove 6e second ratchet tooth 6f first cam part 6g opening 7 first coil spring
8 Second coil spring 9 Case
9a Hollow portion 9b Switch operating body guide groove 9c Locking member guide groove (notch)
9d Rotation restricting portion 9e Second cam portion 9f Cylindrical portion 9g Rectangular body portion 10 Retaining member
10a Through hole 11 Actuating member
11a Through hole 11b Arm portion 11c Movable contact fixing portion 11d Retaining prevention portion 12 Movable contact 12a Positioning hole 12b Movable contact portion 13 Release operation body 13a Release operation portion 13b Drive portion 13c Coil spring fixing portion 14 Third coil spring
15 wafers
15a Opening portion 15b Case positioning recess 15c Projection portion 15d Terminal portion 15e Fixed contact portion 100 Switch operation body 100a Switch operation portion 100b Slide portion 100c Taper portion 100d Depression portion 110 Driver 110a Pressing portion 110b Taper portion

Claims (7)

A wafer having a terminal portion connectable to the outside and a fixed contact portion;
A switch operating body that is capable of moving up and down in response to an external pressing operation, and in which a first ratchet tooth is formed in a circular shape;
A cam follower that is vertically movable and rotatable, has a second ratchet tooth formed to mesh with the first ratchet tooth, and has a first cam portion;
As the switch operating body moves up and down, a movable contact that contacts and separates from the fixed contact portion,
A rotation restriction portion that guides the first cam portion, and a case that includes a lock portion that can lock the movement of the first cam portion,
The switch operating body can be operated to switch between a locked state in which the first cam portion and the lock portion are engaged and a released state in which the engagement between the first cam portion and the lock portion is released. In a switch device having a ratchet mechanism,
A switch device comprising a forcible lock release mechanism capable of forcibly releasing the locked state without operating the switch operating body.   The switch device according to claim 1, wherein the case is provided with a locking member that is movable up and down, and the locking member has the lock portion. The forced unlocking mechanism is
A release operation body arranged to be movable,
A second cam portion provided in the case;
A drive member having a third cam portion engaged with the second cam portion and arranged to be movable;
A locking member that engages with the drive member and is movable up and down,
When pressing the release operation body,
3. The switch according to claim 2, wherein the locking member is moved upward via the second cam portion, the third cam portion, and the driving member, and the locked state is released. apparatus.   4. The switch device according to claim 3, wherein the forced lock release mechanism is provided with a biasing member that biases in a direction against a pressing force generated by a pressing operation of the release operation body. The drive member has a base portion formed in an annular shape, and the third cam portion is provided on the lower surface side of the base portion,
The locking member has a base formed in an annular shape, and a plate-like stopper extends downward from the inner surface side of the base,
A cylindrical part having a notch is formed in the case, and the second cam is provided along an outer surface of the cylindrical part,
The drive member is disposed such that an inner surface engages with the cylindrical portion, and the third cam portion and the second cam portion engage with each other.
The stopper of the said locking member is inserted in the notch of the said case, and it arrange | positions so that the said locking member and the said drive member may be engaged, The Claim 3 and Claim 4 characterized by the above-mentioned. Switch device.   6. The switch device according to claim 3, wherein the second cam portion and the third cam portion are provided at equal intervals in three or more places, respectively.   The switch device according to claim 3, wherein the driving member is accommodated in the wafer.

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