JP4046025B2 - Switch device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch device.
[0002]
[Prior art]
Conventionally, when a target such as a safety cover or door is closed, it has a function to lock the target using a permanent magnet, etc., and it is used for a switch with a lock function that detects opening and closing of the target, industrial equipment, etc. A limit switch is provided.
[0003]
In recent years, it has been proposed to share parts between safety switch devices to enable automatic assembly when a single type of switch device called a safety switch device is developed (see, for example, Patent Document 1). ). Note that the electromagnetic lock in Patent Document 1 is locked using a solenoid.
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-343170
[Problems to be solved by the invention]
By the way, in the invention described in Patent Document 1, when a variation of one type of switch device called a safety switch device is developed, parts can be shared between the safety switch devices.
[0006]
However, the switch with a lock function and the limit switch are switches with different applications, and the two types of switches with different applications are designed and manufactured for each application. It was high.
[0007]
The present invention has been made in view of the above reasons, and an object of the present invention is to provide a switch device capable of reducing the cost of each of the switch with a lock function and the limit switch.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is held by the switch body, the case housing the switch body, and the operation of the switch body, which is inserted into an exposure hole provided in the case. In the case of configuring a switch with a locking function having a locking function, the holding portion that holds at least the magnetic attracting means made of a permanent magnet and the limit switch are configured to pivot one end of the lever for operating the push button. It is characterized in that a pivotal support part to be worn is provided in the case.
[0009]
According to the present invention, the switch main body, the case, and the push button can be shared by the switch with the lock function and the limit switch, and when the switch with the lock function is to be configured, the magnetic adsorption means is held in the case. If you want to configure the limit switch, you can assemble the lever for operating the push button pivotally on the case, so you can reduce the design cost and manufacturing cost of the switch with lock function and limit switch, The cost of each switch with lock function and limit switch can be reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the switch device of the present embodiment will be described with reference to FIGS. 1 to 5.
[0011]
The switch device according to the present embodiment includes a rectangular parallelepiped case 2 formed of a synthetic resin. The switch body 1 is housed in the case 2 and the push button 3 for operating the switch body 1 is held in the case 2. ing. In the following description, the vertical direction in FIG. 1B is defined as the vertical direction.
[0012]
The switch body 1 is a so-called micro switch, and a common terminal 11, a normally open terminal 12, and a normally closed terminal 13 protrude from the lower surface of the housing 10. Here, in the housing 10 of the switch body 1, an operating spring made of a conductive material having one end attached to the common terminal 11, a movable contact (not shown) fixed to the other end of the operating spring, A first fixed contact (not shown) electrically connected to the closed terminal 13 and a second fixed contact (not shown) electrically connected to the normally open terminal 12 are accommodated. Further, the switch body 1 includes an actuator 15 that is inserted into an insertion hole (not shown) provided in the upper wall of the housing 10 and is held by the housing 10, and one end portion of the lever 14 for operating the actuator 15 is the housing. 10, the actuator 15 is pushed downward by the lever 14 when the lever 14 is pushed, and the movable contact comes into contact with the first fixed contact from the state where the movable contact contacts the first fixed contact. It switches to the state where it touches.
[0013]
In the case 2, a circular exposure window for exposing the push button 3 is formed in the center portion of the upper wall, and the lower end portion of the push button 3 is in contact with the lever 14 of the switch body 1. Here, the case 2 is formed by joining a pair of halves 20a and 20b divided in the width direction (vertical direction in FIG. 1A), and joining the pair of halves 20a and 20b. Thus, the switch body 1 is housed in the case 2 and the push button 3 is held in the case 2 so as to be movable in the vertical direction. The halves 20a and 20b are formed in the same shape.
[0014]
The halves 20a and 20b are each provided with one assembly piece 23 projecting from one end in the longitudinal direction toward the other half 20b and 20a, and both sides in the width direction are open to the other end in the longitudinal direction. The fitting recess 26 is formed, and an assembly protrusion 25 that projects into the assembly hole 23 a of the assembly piece 23 is provided on the inner bottom surface of the fitting recess 26. Therefore, the case 2 has the pair of halves 21 and 22 by engaging the assembly protrusions 25 of the other halves 20b and 20a with the assembly holes 23a provided in the assembly pieces 23 of the halves 20a and 20b. Are combined. The assembly projections 25 of the halves 20a and 20b are formed with inclined surfaces 25a that reduce the projecting dimension from the inner bottom surface of the fitting recess 26 toward the side closer to the other halves 20b and 20a. The assembly protrusion 25 is engaged with the assembly hole 23a of the assembly piece 23 only by applying a force so as to bring the pair of halves 20a and 20b closer to each other. Therefore, for example, by bringing the other half 20a close to one half 20b in the direction shown by arrow B in FIGS. 1A and 1C, the two halves 20a and 20b can be They can be easily coupled without using a fixing tool, facilitating assembly work and automation of the assembly work. The bodies 20a and 20b are formed so that the push button 3 and the switch body 1 can be assembled from the same direction as the other halves 20b and 20a. Since the push button 3 and the switch body 1 can be incorporated in the direction of the arrow B, the three members of the push button 3, the switch body 1, and the other half body 20a are arranged in the same direction with respect to one half body 20b. Can be assembled.
[0015]
Here, the half-split bodies 20a and 20b are provided with a push-button storage portion 22 to hold the push button 3 on the surface facing the other half-split bodies 20b and 20a in the upper part of the central portion in the longitudinal direction. A pin-shaped coupling projection 28 and a coupling hole 29 are formed across the push button storage portion 22, and the coupling projection 28 is fitted into the coupling hole 29 of the other half-divided body 20 b, 20 a. Therefore, rattling of the halves 20a and 20b in the longitudinal direction of the case 2 can be prevented.
[0016]
Moreover, the push button 3 in this embodiment has a structure as shown to Fig.2 (a). That is, the push button 3 includes a cylindrical button body 31 having an open bottom surface, an operation body 33 inserted into the button body 31, and a cover plate 32 coupled to the button body 31 inside the lower end portion of the button body 31. It has. Note that the upper end of the button body 31 is formed in a hemispherical shape.
[0017]
The operation body 33 has a bottomed cylindrical spring accommodating portion 33a having an open upper surface and a columnar operation portion 33b that contacts the lever 14 of the switch body 1 below the spring accommodating portion 33a so that the axial directions thereof coincide with each other. A return spring 34 made up of a coil spring is held between the inner bottom surface of the spring housing portion 33a and the inner bottom surface of the button main body 31. Here, the outer diameter dimension of the operation part 33b is set smaller than the outer diameter dimension of the spring accommodating part 33a, and the cover plate 32 is larger than the outer diameter dimension of the operating part 33a than the outer diameter dimension of the spring accommodating part 33a. A small circular insertion hole 32b is also formed, and only the operation portion 33a is inserted into the insertion hole 32b of the lid plate 32. The distance between the inner bottom surface of the button main body 31 and the cover plate 32 is set to be larger than the length dimension of the operation portion 33a. Further, an outer flange portion 31 b for preventing the push button 3 from coming off from the case 2 is provided at the lower end portion of the button body 3 over the entire circumference.
[0018]
In the push button 3 described above, as shown in FIG. 2B, the button body 31 in the axial direction against the spring force of the return spring 34 when the button body 31 is pushed in the direction of the arrow F from above. And the operating body 33 are changed in relative position. Therefore, in the switch device of the present embodiment, it is possible to prevent an excessive load from being applied to the switch body 1 when the push button 3 is pushed, and reliability can be improved.
[0019]
By the way, in the switch device of the present embodiment, two magnet storage portions 24 that can store approximately half of the two rectangular parallelepiped permanent magnets 4 are long on the opposing surfaces of the halves 20a and 20b. The two permanent magnets 4 can be accommodated in the case 2. Here, the two permanent magnets 4 are arranged on both sides of the push button 3 in the longitudinal direction of the case 2. Each half-split body 20a, 20b is formed with a yoke housing portion (not shown) for housing a yoke 5 that is magnetically coupled to the permanent magnet 4, and the upper wall of each half-split body 20a, 20b. A pair of window holes 27 that can expose a part of the yoke 5 are formed apart from each other in the longitudinal direction. Here, the protruding dimension of the yoke 5 from the upper surface of the case 2 is set to be slightly larger than the distance from the upper surface of the case 2 to the tip of the push button 3 when the push button 3 is not pushed.
[0020]
Thus, the switch device according to the present embodiment has a function of locking the object to be opened easily when the object to be opened / closed such as a door or a cover is closed, and to open / close the object. When it is desired to configure as a switch with a lock function to be detected, the case 2 may be assembled by housing the permanent magnet 4 and the yoke 5 in addition to the push button 3 and the switch body 1. When such a switch with a lock function is configured, a suction plate 6 made of a magnetic material as shown in FIG. 3 is fixed to an object. The suction plate 6 is formed in a rectangular plate shape that substantially matches the outer peripheral shape of the case 2, and mounting screws (not shown) made up of countersunk screws are provided on one side (see FIG. A mounting hole 61 to be inserted from the lower surface side) is formed, and can be fixed to the object by inserting the mounting screw into the mounting hole 61 and screwing it onto the object. The mounting hole 61 is a mounting hole for a countersunk screw, so that the countersunk head does not protrude from the one surface. Further, a columnar operation portion 62 for pushing the push button 3 is projected from the one surface of the central portion of the suction plate 6. Therefore, when the object to which the suction plate 6 is fixed is closed, the push button 3 is pushed by the operation portion 62 without being obstructed by the yoke 5 as shown in FIG. In the present embodiment, the permanent magnet 4 and the yoke 5 constitute a magnetic attraction means. In the case 2, the magnet housing portion 24 for housing the permanent magnet 4 and the yoke housing portion for housing the yoke 5 are magnetically attracted. A holding part for holding the means is configured.
[0021]
By the way, in the case 2 of the present embodiment, the cylindrical rotary shafts 21 protrude from both sides in the width direction at both ends in the longitudinal direction, so that the lever 7 for operating the push button 3 as shown in FIG. Can be pivotally attached. Here, the lever 7 has a connecting piece 71 extending from both side edges of one end portion in a direction perpendicular to the thickness direction, and a bearing hole 71 a into which the rotating shaft 21 is fitted is formed in the connecting piece 71. . The rotating shaft 21 is formed with a guide surface 21a that is inclined so as to reduce the amount of protrusion in the width direction of the case 2 as it approaches the upper surface of the case 2, so that the lever 7 can be easily pivoted to the case 2. It is like that.
[0022]
When it is desired to configure the switch device of the present embodiment as a limit switch, the permanent magnet 4 and the yoke 5 described above are unnecessary, and the case 2 is formed after the halves 20a and 20b are joined to form the case 2. One end of the lever 7 may be pivotally attached. In the present embodiment, the rotary shaft 21 constitutes a pivotal support portion that pivotally attaches one end of the lever 7 for operating the push button 3.
[0023]
Therefore, in the switch device of the present embodiment, the switch body 1, the case 2, and the push button 3 can be shared by the switch with a lock function and the limit switch. 2 to hold the magnetic attraction means, and if it is desired to constitute a limit switch, the lever 7 for operating the push button 3 may be assembled to be pivotally attached to the case 2. The design cost and manufacturing cost of each switch can be reduced, and the cost of each of the switch with a lock function and the limit switch can be reduced.
[0024]
In the present embodiment, the nameplate 8 labeled according to the application such as a switch with a lock function or a limit switch is attached to one surface of the case 2 in the width direction. Can do.
[0025]
【The invention's effect】
According to the first aspect of the present invention, the switch body with the lock function and the limit switch can share the switch body, the case, and the push button, and when the switch with the lock function is to be configured, the case holds the magnetic attraction means. If you want to configure a limit switch, you can assemble the lever for operating the push button pivotally on the case, so you can reduce the design cost and manufacturing cost of the switch with lock function and limit switch respectively. There is an effect that the cost of each of the switch with a lock function and the limit switch can be reduced.
[Brief description of the drawings]
1A and 1B show a case where a switch with a lock function is configured in the embodiment, in which FIG. 1A is a front view showing a state in which one half of a case is removed, FIG. 1B is an exploded plan view, and FIG. It is a side view.
FIG. 2 is an operation explanatory view of the push button in the same as above.
FIGS. 3A and 3B show a suction plate used when a switch with a lock function is configured, in which FIG. 3A is a partially broken front view, and FIG. 3B is a bottom view.
FIG. 4 is a front view showing a usage pattern when a switch with a lock function is configured in the same as above.
FIG. 5 is a front view when a limit switch is configured in the same as above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Switch body 2 Case 3 Push button 4 Permanent magnet 5 Yoke 6 Suction plate 7 Lever 8 Name plate 10 Housing 11 Common terminal 12 Normally open terminal 13 Normally closed terminal 14 Lever 15 Actuator 20a, 20b Half split body 21 Rotary shaft 23 Assembly piece 23a Assembly Hole 24 Magnet housing portion 25 Assembly protrusion 25a Inclined surface 26 Fitting recess 27 Window hole 28 Connection protrusion 29 Connection hole 71 Connection piece 71a Bearing hole

Claims (1)

A switch body with a lock function comprising a switch body, a case housing the switch body, and a push button inserted into an exposure hole provided in the case for holding the switch body and held in the case. In this case, the case is provided with a support portion for pivotally attaching one end portion of a lever for operating the push button when the holding portion and the limit switch are configured to hold at least a magnetic attraction means made of a permanent magnet. Switch device.

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