JP2022078496A - Micro switch - Google Patents

Abstract

To provide a micro switch that can prevent a movable member from coming off due to vibration or impact.SOLUTION: A micro switch 1 includes a movable member 6 that has a movable contact 6a that can contact first and second fixed contacts 5b and 4b that are separated from each other at one end and can swing in the vertical direction, and a protrusion 9 as a regulating member arranged on the lateral side of one end of the movable member 6 and restricting the lateral movement of one end of the movable member 6.SELECTED DRAWING: Figure 3

Description

The present invention relates to a micro switch used as a detection switch, an operation switch, and the like.

The microswitches described in Japanese Patent Publication No. 63-129928 include a common terminal (8) fixed to a switch base (1), a normally open terminal (3), a normally closed terminal (4), and a normally open terminal (4). A movable contact that is arranged between the normally open contact (3b) of 3) and the normally closed contact (4b) of the normally closed terminal (4) and has a switching contact (5a, 5b) at one end that selectively contacts them. It is provided with a piece (5), a rotatable actuator (9) for rotating the movable contact piece (5), and a reversing spring (7) suspended between the movable contact piece (5) and the actuator (6). (Fig. 1 of the relevant publication).

In the above-mentioned micro switch, when the actuator (9) is pushed down, the reversing spring (7) reverses and the movable contact piece (5) rotates downward, whereby the contacts are switched and switched. The contact (5b) is in contact with the normally open contact (3b) (see the two-dot chain line in FIG. 1 of the above publication).

By the way, in such a micro switch, the switching contact (5a, 5b) which is a free end of the movable contact piece (5) is caused by vibration or impact during transportation, impact when the micro switch is dropped during installation, or the like. The end portion on the) side may move excessively sideways (in the direction perpendicular to the paper surface of FIG. 1 of the above publication). In such a case, there is a possibility that the fulcrum portion on the rotation center side of the movable contact piece (5) may come off from each mounting piece (8a, 8b) of the common terminal (8).

However, in the above-mentioned conventional configuration, sufficient measures have not been taken to prevent the movable contact piece from coming off due to vibration, impact, or the like.

The present invention has been made in view of such conventional circumstances, and the problem to be solved by the present invention is to provide a microswitch capable of preventing the movable member (movable contact piece) from coming off due to vibration, impact, or the like. To provide.

The micro switch according to the present invention has a movable contact at one end that can contact the first and second fixed contacts that are spaced apart from each other, and has a movable member that can swing in the vertical direction and a side surface of one end of the movable member. It is arranged in and is equipped with a regulating member for regulating the lateral movement of one end of the movable member.

According to the present invention, when one end of a movable member is excessively moved laterally due to vibration, impact, or the like, the restricting member can regulate the lateral movement of one end of the movable member. This makes it possible to prevent the movable member from coming off due to vibration, impact, or the like.

In the present invention, the first or second fixed contact is attached to the fixed terminal extending from the base, and the regulating member is provided on the fixed terminal.

In the present invention, the regulating member has a first regulating member for restricting the movement of one end of the movable member to one side and a second regulating member for restricting the movement of one end of the movable member to the other side. It has a regulatory member of.

In the present invention, the microswitch includes a first housing and a second housing combined with the first housing, and the regulating member regulates the movement of one end of the movable member to one side. It has a regulation member of 1 and a second regulation member for restricting the movement of one end of the movable member to the other side, and the first regulation member is provided in the first housing and is the first. The regulating member of 2 is provided in the second housing.

In the present invention, a support frame that swingably supports the other end of the movable member and a tension spring that exerts a tensile force on one end of the movable member are further provided, and the support frames are arranged on both sides of the tension spring. In addition, a first columnar member arranged on one side of the tension spring and extending in the height direction and a second columnar member arranged on the other side of the tension spring and extending in the height direction are provided. ing. The other end of the movable member is bifurcated, one of the other ends swingably engages with the first engaging recess formed in the first columnar member of the support frame, and the other of the other ends. It is swingably engaged with the second engaging recess formed in the second columnar member of the support frame.

In the present invention, a support frame that swingably supports the other end of the movable member and a movable member for reversing the movable member so as to move the movable contact from the first fixed contact side to the second fixed contact side. It further includes an actuator and a tension spring that exerts a tensile force on one end of the movable member. Support frames are arranged on both sides of the tension spring, a first columnar member arranged on one side of the tension spring and extending in the height direction, and an arrangement on the other side of the tension spring. It has a second columnar member extending in the height direction. One end of the actuator swingably engages with the engaging recess provided in the base, the tension spring is engaged with the other end, and a part of both sides of the actuator is between one end and the other end. The upward movement of the actuator is restricted by engaging with the third engaging recess formed in each of the first and second columnar members.

In the present invention, a support frame that swingably supports the other end of the movable member and a movable member for reversing the movable member so as to move the movable contact from the first fixed contact side to the second fixed contact side. It further includes an actuator and a tension spring that exerts a tensile force on one end of the movable member. When the movable member is reversed by the actuator, one end of the movable member is displaced laterally or in the opposite direction under the action of the tensile force of the tension spring so that the movable contact slides with respect to the fixed contact. It has become.

In the present invention, one end of the tension spring is locked to one end of the movable member and the other end is locked to the actuator, and the movable member rotates around the other end of the tension spring during the reversing operation of the movable member. By doing so, the movable contact slides with respect to the fixed contact.

As described above, according to the present invention, it is possible to provide a microswitch capable of preventing the movable member from coming off due to vibration, impact or the like.

It is a front perspective view which shows the main component of the microswitch by one Embodiment of this invention. It is a rear perspective view of the micro switch (FIG. 1). It is a front view of the micro switch (FIG. 1). It is a rear view of the micro switch (FIG. 1). It is a left side view of the micro switch (FIG. 1). It is a right side view of the micro switch (FIG. 1). FIG. 3 is a sectional view taken along line VII-VII of FIG. FIG. 3 is a sectional view taken along line VIII-VIII of FIG. It is a top view of the micro switch (FIG. 1). It is an exploded assembly drawing of the said microswitch (FIG. 1). It is an overall perspective view of the common terminal in the micro switch (FIG. 1). In the micro switch (FIG. 1), the state before the operation of the actuator is shown. In the micro switch (FIG. 1), the state immediately after the operation of the actuator and before the reversal of the movable member is shown. FIG. 12 is a sectional view taken along line XIV-XIV of FIG. FIG. 13 is a cross-sectional view taken along the line XV-XV of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 15 are diagrams for explaining a microswitch according to an embodiment of the present invention, and FIGS. 1 to 6 and 9 are diagrams and views showing the main components of the microswitch according to the present embodiment. 7 and 8 are side sectional views of the micro switch, FIG. 10 is an exploded assembly view of the micro switch, FIG. 11 is a perspective view of a single common terminal of the micro switch, and FIGS. 12 to 15 are for explaining the operation of the micro switch. It is a figure. In the following description, the longitudinal direction of the microswitch is referred to as the front-back direction, the lateral direction is referred to as the lateral or horizontal direction, and the direction orthogonal to these is referred to as the vertical direction or the height direction. That is, when FIG. 3 is taken as an example, the left-right direction in the figure is the front-back direction, the vertical direction on the paper surface in the figure is the side or left-right direction, and the up-down direction in the figure is the up-down direction.

As shown in FIGS. 1 to 6 and 10, the microswitch 1 according to the present embodiment has a base 2 which is an insulating base made of synthetic resin and a common terminal 3 which is integrally fixed to the base 2 by insert molding. , A normally open fixed terminal 4 and a normally closed fixed terminal 5. Each of these terminals extends in the vertical direction through the base 2, and the base end portion of each terminal has external connection terminals 3A, 4A, and 5A extending below the base 2, respectively.

The tip portion (switching side end portion) of the normally open fixed terminal 4 has a normally open fixed contact (second fixed contact) 4b arranged above the base 2, and is a tip portion of the normally closed fixed terminal 5. (Switching side end portion) has a normally closed fixed contact (first fixed contact) 5b that is separated from the normally open fixed contact 4b above the base 2 and is arranged to face the normally above the normally closed fixed contact 4b. The normally open fixed contact 4b is fixed to a contact mounting portion 4a arranged at a position closer to the base 2 above the base 2 by caulking or the like. The normally closed fixed contact 5b is similarly fixed to the contact mounting portion 5a located above the base 2 at a position away from the base 2 by caulking or the like.

The tip of the common terminal 3 has a substantially U-shaped (or roughly U-shaped) support frame 30. The support frame 30 is arranged so as to face each other with a space between the first columnar member 30A extending in the vertical direction and the first columnar member 30A on the side of the first columnar member 30A, and similarly in the vertical direction. It has a second columnar member 30B that extends, and a connecting member 30C that connects the first and second columnar members 30A and 30B in the left-right direction.

As shown in FIG. 7 which is a cross section of VII-VII in FIG. 3 and FIG. 8 which is a cross section of VIII-VIII in FIG. 3, a first columnar member in which one end of the connecting member 30C is connected in the support frame 30. A part of the first end portion 30A ₁ of 30A is embedded in the base 2 and fixed to the base 2, and is a fixed end. On the other hand, the second end portion 30B ₁ of the second columnar member 30B to which the other end of the connecting member 30C is connected is not embedded in the base 2 (hence, fixed to the base 2). It is free end, that is, free), and is located above the base 2. Therefore, the connecting member 30C for connecting the end portions 30A ₁ and 30B ₁ in the left-right direction is arranged above the upper surface 2A with a space between the connecting member 30C and the upper surface 2A of the base 2.

Here, as shown in FIG. 11, the common terminal 3 is configured by three-dimensionally bending the terminal plate, and the support frame 30 is arranged in a direction substantially orthogonal to the direction of the external connection terminal 3A. There is. As shown in the figure, the common terminal 3 has an extension portion 30A ₂ extending below the connecting portion 30C from the first end portion 30A ₁ of the first columnar member 30A. As shown in FIGS. 7 and 8, the extension portion 30A ₂ is embedded in the base 2 and fixed to the base 2. In the common terminal 3, there are three bending points BP between the extending portion 30A ₂ and the external connection terminal 3A (see FIG. 11), and the reason is as follows. After the common terminal 3 is punched out in an expanded state integrally connected to the normally open fixed terminal 4 and the normally closed fixed terminal 5, each contact 4b, while maintaining the connected state of the terminals 3, 4 and 5. Each terminal 3, 4, 5 is bent through the fixing process of 5b, and after being insert-molded into the base 2, each terminal 3, 4, 5 is separated. If there is, the support frame 30 of the common terminal 3 interferes with the adjacent normally open fixed terminal 4 in the expanded state, and this is to eliminate it.

Further, in the examples shown in FIGS. 7 and 9, the height of the connecting member 30C in the height direction (vertical direction) is such that the height at the first end portion 30A ₁ is h ₁ and the second end portion. When the height at 30B ₁ is h ₂ ,
h ₁ > h ₂
Is set to.

In the examples shown in FIGS. 7 and 8, the height of the connecting member 30C gradually decreases from the end portion 30A ₁ toward the end portion 30B ₁ , and the connecting member 30C is from the front-rear direction. It is formed in a tapered shape as seen.

As shown in FIGS. 1 to 6, 9 and 10, the micro switch 1 has a movable contact 6a at one end and a movable member 6 that can swing in the vertical direction with the other end as a fulcrum. .. The movable contact 6a is composed of a movable contact 6a ₁ arranged on the upper side and a 6a ₂ arranged on the lower side, and the upper movable contact 6a ₁ is provided so as to be in contact with the normally closed fixed contact 5b. The lower movable contact 6a ₂ is provided so as to be in contact with the normally open fixed contact 4b.

The other end side of the movable member 6 is bifurcated, has a rear end surface 60b at the tip thereof, and has a pair of left and right side wall portions 6A and 6B, respectively. Notches 6A ₁ and 6B ₁ are formed at the tips of the side wall portions 6A and 6B, respectively. On the other hand, (first and second) engaging recesses 30A ₃ and 30B ₃ are formed on the outer surfaces of the first and second columnar members 30A and 30B of the support frame 30 on the base 2 side, respectively. .. The tip portions of the side wall portions 6A and 6B of the movable member 6 are engaged with the engaging recesses 30A ₃ and 30B ₃ of the first and second columnar members 30A and 30B of the support frame 30, respectively (FIG. 1). 3), FIG. 5, and FIG. 7), whereby the other end side of the movable member 6 is supported by the engaging recesses 30A ₃ and 30B ₃ of the support frame 30 so as to be swingable in the vertical direction. The vertical movement is restricted by the upper and lower wall surfaces constituting the engaging recesses 30A ₃ and 30B ₃ . At this time, each rear end surface 60b at the other end of the movable member 6 is in contact with the first and second columnar members 30A and 30B (see FIG. 9).

As shown in FIGS. 1 to 4 and 10, the micro switch 1 moves the movable contact 6a of the movable member 6 from the upper position on the normally closed fixed contact 5b side to the lower position on the normally open fixed contact 4b side. , The actuator 7 for reversing the movable member 6 is provided. The actuator 7 is arranged so as to intersect the movable member 6 (see FIGS. 3 and 4).

As shown in FIG. 10, the actuator 7 has a pair of support plate portions 7a and 7b projecting to both the left and right sides at one end. On the other hand, the base 2 is provided with a pair of left and right pedestals 20A and 20B protruding upward, and the pedestals 20A and 20B are provided with engaging recesses 20a and 20b which are, for example, V-shaped notches in the front view. Are formed respectively. The support plate portions 7a and 7b of the actuator 7 are engaged with the engaging recesses 20a and 20b of the pedestals 20A and 20B, respectively (see FIGS. 3 and 4), whereby the actuator 7 is engaged with each other. It is supported by the joint recesses 20a and 20b so as to be swingable in the vertical direction, and the movement in the vertical direction is restricted by the upper and lower wall surfaces constituting the engaging recesses 20a and 20b. Further, the actuator 7 has an operation unit 71 operated from the outside at the other end.

As shown in FIGS. 1 to 4, 9 and 10, the microswitch 1 has a tension coil spring (tension spring) 8. The tension coil spring 8 has hook portions 8a and 8b for locking at each end. The hook portion 8a of the tension coil spring 8 is locked to the locking protrusion 60a (FIG. 10) provided on one end side of the movable member 6, and the hook portion 8b is provided on the other end side of the actuator 7. It is locked to the locking protrusion 70a (FIG. 10). As a result, the tensile force of the tension coil spring 8 acts between one end side of the movable member 6 and the other end side of the actuator 7.

As shown in FIG. 9, one end of the tension coil spring 8 is arranged between the first and second columnar members 30A and 30B of the support frame 30. That is, the first and second columnar members 30A and 30B of the support frame 30 are arranged on both the left and right sides with the tension coil spring 8 interposed therebetween. Further, as shown in FIG. 10, the actuator 7 has a pair of left and right overhanging portions 7c and 7d that overhang upward at the central portion in the longitudinal direction (that is, an intermediate position between one end portion and the other end portion). is doing. On the other hand, as shown in FIG. 11, (third) engaging recesses 30A ₄ and 30B ₄ are formed on the inner side surfaces of the first and second columnar members 30A and 30B of the support frame 30, respectively. .. The overhanging portions 7c and 7d of the actuator 7 are engaged with the engaging recesses 30A ₄ and 30B ₄ of the first and second columnar members 30A and 30B of the support frame 30, respectively (see FIG. 8). As a result, the upward movement of the actuator 7 is restricted by the upper wall surfaces constituting the engaging recesses 30A ₄ and 30B ₄ .

As shown in FIGS. 3 and 4, on the upper portion of the extension portion 5c of the normally closed fixed terminal 5 extending upward from the base 2 so as to support the contact attachment portion 5a of the normally closed fixed contact 5b from below. , A protruding portion 9 projecting inward (left side in FIG. 3 and right side in FIG. 4) is provided. The protrusion 9 is arranged at a position on the side of one end of the movable member 6 (the back side of the paper surface in FIG. 3 and the front side of the paper surface in FIG. 4) at a predetermined distance from one end of the movable member 6 and is arranged on the front surface. It overlaps with one end of the movable member 6 when viewed from the direction. The protrusion 9 functions as a regulating member for regulating the lateral movement of one end of the movable member 6.

The reason for providing the protruding portion 9 as such a regulating member is as follows.
One end of the movable member 6 on the free end side may move excessively toward the side due to vibration or impact during transportation of the micro switch 1, or due to an impact when the micro switch 1 is dropped during installation. .. In such a case, by bringing one end of the moved movable member 6 into contact with the protruding portion 9, it is possible to prevent the amount of lateral movement of one end of the movable member 6 from becoming excessive, and to prevent the movable member 6 from becoming excessive. This is to avoid a state in which the other end is detached from the first and second columnar members 30A and 30B of the support frame 30.

Further, in the micro switch 1, as described above, the tip portions of the side wall portions 6A and 6B on the other end side of the movable member 6 are engaged with the first and second columnar members 30A and 30B of the support frame 30. Since they are engaged with the joint recesses 30A ₃ and 30B ₃ (see FIGS. 5 and 7), and the vertical movement is restricted by the upper and lower wall surfaces constituting the engaging recesses 30A ₃ and 30B ₃ , respectively. It is possible to prevent the other end of the movable member 6 from coming off from the first and second columnar members 30A and 30B due to the action of direct force caused by vibration during transportation, impact, impact at the time of dropping, and the like.

Further, in the micro switch 1, as described above, the support plate portions 7a and 7b of the actuator 7 are engaged with the engaging recesses 20a and 20b of the pedestals 20A and 20B, respectively (FIGS. 3 and 3). 4), Since the movement in the vertical direction is restricted by the upper and lower wall surfaces constituting the engaging recesses 20a and 20b, the action of force caused by vibration during transportation, impact, impact at the time of dropping, etc. It is possible to prevent the support plate portions 7a and 7b of the actuator 7 from coming off from the pedestals 20A and 20B. Moreover, the overhanging portions 7c and 7d of the actuator 7 are engaged with the engaging recesses 30A ₄ and 30B ₄ of the first and second columnar members 30A and 30B of the support frame 30, respectively (see FIG. 8). Since the upward movement of the actuator 7 is restricted by the upper wall surfaces constituting the engaging recesses 30A ₄ and 30B ₄ , the action of force caused by vibration during transportation, impact, impact at the time of dropping, etc. It is possible to prevent the overhanging portions 7c and 7d of the actuator 7 from coming off from the first and second columnar members 30A and 30B.

Next, the operation of the micro switch will be described with reference to FIGS. 12 to 15.
FIG. 12 shows the state of the micro switch 1 before the operation of the actuator 7, and FIG. 13 shows the state immediately after the operation. 14 is a cross-sectional view taken along the line XIV-XIV of FIG. 12, and FIG. 15 is a cross-sectional view taken along the line XV-XV of FIG.

In the pre-operation state shown in FIG. 12, the movable contact 6a ₁ of the movable member 6 is in contact with the normally closed fixed contact 5b, and the circuit between the common terminal 3 and the normally closed fixed terminal 5 is closed. A predetermined contact pressure is applied by the urging force of the tension coil spring 8. At this time, as shown in FIG. 14, the axis CL ₀ of the tension coil spring 8 substantially coincides with the center lines of the movable contact 6a ₁ and the normally closed fixed contact 5b of the movable member 6. That is, the movable contacts 6a ₁ and the normally closed fixed contacts 5b are placed in a state in which their center lines are substantially aligned when viewed from above.

When the actuator 7 is operated from this state, as shown in FIG. 13, each of the pedestals 20A and 20B on the base 2 side is engaged with the support plate portions 7a and 7b on one end side of the actuator 7. The actuator 7 swings downward around the recesses 20a and 20b, and the operation unit 71 moves downward. As a result, the movable member 6 is inverted and the movable member 6 is moved upward on the normally closed fixed contact 5b side. Attempts to move from the position to the lower position on the normally open fixed contact 4b side.

In this case, immediately before the movable member 6 is inverted by the actuator 7, as shown in FIG. 13, the movable contact 6a ₁ of the movable member 6 is still in contact with the normally closed fixed contact 5b. Then, as the actuator 7 swings downward, the hook portion 8a of the tension coil spring 8 is locked, and the locking protrusion 60a on one end side of the movable member 6 and the hook portion 8b are locked. The distance between the actuator 7 and the locking protrusion 70a on the other end side is large. Therefore, the tension coil spring 8 is stretched, so that the tensile force acting on one end side of the movable member 6 is increased. is doing.

At this time, the rear end surfaces 60b of the bifurcated other ends of the movable member 6 come into contact with each other (see FIG. 9), and the other ends of the movable member 6 come into contact with the first and second columnar members 30A and 30B of the support frame 30. The pressing force acting on each increases. As described above, since the first end portion 30A ₁ of the first columnar member 30A is fixed to the base 2 and the second end portion 30B ₁ of the second columnar member 30B is not fixed to the base 2. When the pressing force acting from the other end of the movable member 6 increases, the second end portion 30B ₁ of the second columnar member 30B is relatively closer to the first end portion 30A ₁ of the first columnar member 30A. It is greatly deformed and the amount of deformation becomes large. In other words, at this time, the second end portion 30B ₁ of the second columnar member 30B is displaced with respect to the first end portion 30A ₁ of the first columnar member 30A, and the first end portion is used. The amount of displacement is larger than that of 30A ₁ , and the second columnar member 30B rotates around the first columnar member 30A.

Moreover, in this case, as shown in FIG. 8, the height h ₁ of the first end portion 30A ₁ is larger than the height h ₂ of the second end portion 30B ₁ , and the connecting member is preferable. Since the height of 30C gradually decreases from the first end portion 30A ₁ toward the second end portion 30B ₁ and the connecting member 30C is formed in a tapered shape, the height of the second end portion 30B ₁ The displacement amount is further larger than the displacement amount of the first end portion 30A ₁ .

Further, at this time, since the first end portion 30A ₁ of the first columnar member 30A is a fixed end and the second end portion 30B ₁ of the second columnar member 30B is a free end, the movable member 6 When the pressing force acting on the columnar members 30A and 30B increases from the other end of the columnar member 30A, the displacement amount of the first columnar member 30A with respect to the first end portion 30A ₁ is larger than that of the second columnar member 30B. The amount of displacement with respect to the end portion 30B ₁ is larger.

As a result, as shown in FIG. 15, under the action of the tensile force of the tension coil spring 8, one end side of the movable member 6 is displaced laterally around the other end side (that is, it rotates toward the side). Move). At this time, since the hook 8a on one end side of the tension coil spring 8 is locked to the locking protrusion 60a on the one end side of the movable member 6, the tension coil spring 8 is displaced due to the lateral displacement of the movable member 6. One end side of is also displaced toward the side. As a result, as shown in the one-dot chain line and the two-dot chain line in the figure, the axis CL ₁ of the tension coil spring 8 is displaced laterally from the position of the axis CL ₀ around the other end side of the tension coil spring 8. Then, it is displaced in the direction intersecting the axis CL ₀ . Along with this, the movable contact 6a ₁ on one end side of the movable member 6 is displaced in the direction intersecting the axis CL ₀ of the tension coil spring 8 while maintaining the state of being in contact with the fixed contact 5b. At this time, as shown in the figure, the movable contact 6a ₁ is displaced (that is, rotated toward the side) so as to be laterally displaced with respect to the normally closed fixed contact 5b, and is replaced with the normally closed fixed contact 5b. Sliding.

In this way, the contact surface can be sufficiently wiped and the insulating film on the contact surface can be peeled off.

When the actuator 7 is further operated beyond the state shown in FIG. 13, the movable member 6 is inverted, and the movable member 6 is moved from the upper position on the normally closed fixed contact 5b side to the lower position on the normally open fixed contact 4b side. It moves, which switches the contacts.

Further, when the movable contact 6a on one end side of the movable member 6 returns from the lower position on the normally open fixed contact 4b side to the upper position on the normally closed fixed contact 5b side, the movable contact 6a is described above with respect to the normally closed fixed contact 5b. Since it tries to displace in the direction opposite to the displacement direction at the time of the reversing operation, it is conceivable that the amount of movement of one end of the movable member 6 to the side increases due to the inertia at that time.

Even in such a case, by providing the protruding portion 9 at a position on the side of one end of the movable member 6, one end of the movable member 6 that has moved to the side can be brought into contact with the protruding portion 9. As a result, the amount of movement of one end of the movable member 6 to the side is prevented from becoming excessive, and the other end of the movable member 6 is separated from the first and second columnar members 30A and 30B of the support frame 30. It can be avoided to occur.

[First modification]
In the above embodiment, an example in which the protrusion 9 is provided only on one side of the movable member 6 is shown, but the application of the present invention is not limited to this. The protrusion 9 may be provided on the other side in the direction opposite to the one side. That is, in the above embodiment, the protruding portion 9 is arranged on the back side of the paper surface in FIG. 3, but may be arranged on the front side of the paper surface in the same figure. In this case, the protruding portions 9 are arranged on both the left and right sides with one end of the movable member 6 interposed therebetween, and form the first and second regulating members, respectively.

In this case, one end of the movable member 6 on the free end side is different from the above-mentioned side due to vibration or impact during transportation of the micro switch 1 or impact when the micro switch 1 is dropped during installation. Even when the movable member 6 is excessively moved toward the other side in the opposite direction (that is, the front side of the paper in FIG. 3), one end of the moved movable member 6 is brought into contact with another protruding portion 9 so that one end of the movable member 6 is brought into contact with the other protruding portion 9. It is possible to prevent the amount of movement to the other side from becoming excessive, so that the other end of the movable member 6 is separated from the first and second columnar members 30A and 30B of the support frame 30. It can be avoided. That is, in this case, even if one end of the movable member 6 on the free end side moves to any side, it is possible to prevent the other end side of the movable member 6 from coming off due to the movement.

In this case, the protruding portion 9 arranged on the front side of the paper surface in FIG. 3 does not hinder the movement when one end of the movable member 6 is displaced during the reversing operation of the movable member 6 by the actuator 7. It is installed through a predetermined gap between it and one end of the movable member 6. Specifically, it is provided above the base 2 in the extended portion 5c of the normally closed fixed terminal 5 and the contact mounting portion 4a of the normally open fixed terminal 4. When provided in the contact mounting portion 4a, it is necessary to secure a sufficient insulating distance from one end of the movable member 6.

[Second modification]
In the above embodiment, an example in which the protruding portion 9 is provided on the base (first housing) 2 side of the micro switch 1 is shown, but the application of the present invention is not limited to this. A similar protrusion 9 may be provided on the lid (second housing) (not shown) side to be combined with the base 2 without providing the protrusion 9 on the base 2 side. In this case, the protruding portion 9 on the lid side is composed of, for example, an overhanging portion or a rib that protrudes inward from the inner wall surface of the lid. Further, in addition to the protruding portion 9 as the first regulating member on the base 2 side, another protruding portion as the second regulating member may be provided on the lid side. In this case, another protrusion on the lid side (second restricting member) is for restricting the movement of one end of the movable member 6 toward the other side, and the protrusion on the base 2 side (first restricting member). In addition to the restricting member) 9, the movement of one end of the movable member 6 to the left and right sides can be restricted.

[Other variants]
The above-mentioned examples and each modification should be regarded as merely examples of the present invention in all respects, and are not limited. Those skilled in the art in the field to which the present invention relates will not deviate from the spirit and essential features of the present invention when considering the above teachings, even if not explicitly stated in the present specification. Various variants and other embodiments that employ the principle of can be constructed.

The present invention is useful for microswitches used as detection switches, operation switches, and the like.

1: Micro switch

2: Bases 20a and 20b: Engagement recesses

4b: Normally open fixed contact (second fixed contact)
5b: Normally closed fixed contact (first fixed contact)

6: Movable members 6a ₁ , 6a ₂ , 6a: Movable contacts

7: Actuator

8: Tension coil spring (tension spring)

9: Protruding part (regulatory member)

30: Support frame 30A: First columnar member 30A ₁ : First end 30A ₃ : (First) engaging recess 30A ₄ : (Third) engaging recess 30B: Second columnar member 30B ₁ : Second end 30B ₃ : (Second) engaging recess 30B ₄ : (Third) engaging recess 30C: Connecting part (regulatory member)

CL ₀ , CL ₁ : Axis line

Jikkai Sho 63-129928 (see pages 2-4, 4 and 5)

Claims (8)

In the micro switch
A movable member that has a movable contact at one end that can contact the first and second fixed contacts that are spaced apart and that can swing in the vertical direction.
A regulating member arranged on the side of the one end of the movable member and for restricting the lateral movement of the one end of the movable member.
Micro switch with. In claim 1,
The first or second fixed contact is attached to a fixed terminal extending from the base, and the restricting member is provided on the fixed terminal.
A micro switch that features that. In claim 1 or 2,
The restricting member has a first restricting member for restricting the lateral movement of the one end of the movable member and a second restricting member for restricting the lateral movement of the one end of the movable member. Has a regulatory member,
A micro switch that features that. In claim 1,
The microswitch comprises a first housing and a second housing combined with the first housing.
The restricting member has a first restricting member for restricting the lateral movement of the one end of the movable member and a second restricting member for restricting the lateral movement of the one end of the movable member. The first regulating member is provided in the first housing, and the second regulating member is provided in the second housing.
A micro switch that features that. In claim 1,
A support frame that swingably supports the other end of the movable member,
A tension spring that exerts a tensile force on the one end of the movable member is further provided.
The support frame is arranged on both sides of the tension spring, and is arranged on one side of the tension spring and extends in the height direction, and on the other side of the tension spring. It is provided with a second columnar member that is disposed and extends in the height direction.
The other end of the movable member is bifurcated, and one of the other ends swingably engages with the first engaging recess formed in the first columnar member of the support frame. The other end of the support frame is swingably engaged with a second engaging recess formed in the second columnar member of the support frame.
A micro switch that features that. In claim 1,
A support frame that swingably supports the other end of the movable member,
An actuator for reversing the movable member so as to move the movable contact from the first fixed contact side to the second fixed contact side.
A tension spring that exerts a tensile force on the one end of the movable member is further provided.
The support frame is arranged on both sides of the tension spring, and is arranged on one side of the tension spring and extends in the height direction, and on the other side of the tension spring. It has a second columnar member that is disposed and extends in the height direction.
One end of the actuator swingably engages with the engaging recess provided in the base, the tension spring is engaged with the other end, and a part of both side portions of the actuator is the one end and the other end. By engaging with the third engaging recess formed in each of the first and second columnar members, the upward movement of the actuator is restricted.
A micro switch that features that. In claim 1,
A support frame that swingably supports the other end of the movable member,
An actuator for reversing the movable member so as to move the movable contact from the first fixed contact side to the second fixed contact side.
A tension spring that exerts a tensile force on the one end of the movable member is further provided.
During the reversing operation of the movable member by the actuator, the movable contact is fixed by the displacement of one end of the movable member in the lateral direction or in the opposite direction under the action of the tensile force by the tension spring. It is designed to slide with respect to the contacts,
A micro switch that features that. In claim 7,
One end of the tension spring is locked to the one end of the movable member, and the other end is locked to the actuator. During the reversing operation of the movable member, the movable member is around the other end of the tension spring. Is rotated so that the movable contact slides with respect to the fixed contact.
A micro switch that features that.

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