JP7538004B2 - Microswitch - Google Patents

Description

The present invention relates to a microswitch that is used as a detection switch, an operation switch, etc.

The microswitch described in Japanese Utility Model Application Publication No. 63-129928 comprises a common terminal (2), a normally open terminal (3), and a normally closed terminal (4) fixed to a switch base (1), a movable contact (5) that is arranged between the normally open contact (3b) of the normally open terminal (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 these, a rotatable actuator (6) for rotating the movable contact (5), and a reversing spring (7) suspended between the movable contact (5) and the actuator (6) (pages 2-4, Figures 4 and 5 of the publication).

In the above-mentioned microswitch, when the actuator (6) is pushed downward, the reversing spring (7) reverses and the movable contact piece (5) moves downward, thereby switching the contacts so that the switching contact (5b) comes into contact with the normally open contact (3b) (see the two-dot chain line in Figure 4 of the above publication).

However, in such microswitches, an insulating film may form on the contact surface due to oxidation or sulfurization, which reduces the reliability of the switch. To prevent oxidation or sulfurization of the contact surface, it is possible to gold plate the contact surface, but gold plating is generally expensive, which increases costs. Therefore, it is possible to wipe the contact surface by moving the movable contact so that it slides against the fixed contact when switching the contacts, thereby peeling off the insulating film on the contact surface.

However, in the above conventional configuration, when the contacts are switched, the switching contact (5a) simply moves downward away from the normally closed contact (4b), and no consideration is given to wiping of the contact surfaces.

The present invention was made in consideration of such conventional circumstances, and the problem that the present invention aims to solve is to provide a microswitch that can sufficiently wipe the contact surface when switching the contacts, and can peel off the insulating coating on the contact surface. Furthermore, the present invention aims to improve wiping performance by allowing the movable contact to slide sideways relative to the fixed contact when switching the contacts.

The microswitch of the present invention comprises a movable member having at one end a movable contact capable of contacting first and second fixed contacts arranged at a distance and fixed to a base, and the other end of which is supported so as to be swingable on a support frame, an actuator for inverting the movable member so as to move the movable contact from the first fixed contact side to the second fixed contact side, and a tension spring arranged in the forward/backward direction so as to apply a tensile force to one end of the movable member. The support frame is configured in a roughly U-shape or U-shape with a first columnar portion disposed on either the left or right side of the tension spring, the first columnar portion having a first end and extending upward from the first end, a second columnar portion disposed on the other left or right side of the tension spring, the second columnar portion having a second end and extending upward from the second end, and a connecting portion connecting the first end and the second end, and only the first end is a fixed end fixed to the base, and the second end is a free end not fixed to the base, and a structural member consisting of the first end, the connecting portion and the second end is cantilevered on the base by the first end. During a reversal operation of the movable member, under the action of the tension force of the tension spring, the second end pivots around the first end via the connecting portion in a horizontal plane, thereby causing the second columnar portion to rotate around the first end via the connecting portion, and as a result, the movable contact is displaced in the left-right direction relative to the first fixed contact.

In the present invention, when the movable member is reversed by the actuator, the movable contact moves from the first fixed contact side to the second fixed contact side, thereby switching the contact. When the movable member is reversed, the second end of the support frame pivots around the first end via the connecting part in a horizontal plane under the action of the tensile force of the tension spring, so that the second columnar part of the support frame rotates around the first end via the connecting part, thereby displacing the movable contact in the left-right direction relative to the first fixed contact. According to the present invention, at this time, only the first end of the support frame supporting the other end of the movable member is a fixed end fixed to the base, and the second end is a free end not fixed to the base, and the beam-shaped structural member consisting of the first end, the connecting part, and the second end is cantilevered to the base by the first end, so that when a load acts on the support frame when the movable member is reversed under the action of the tensile force of the tension spring at the time of switching the contact, the second end is deformed relatively more than the first end. As a result, the second end of the other end of the movable member is deformed more than the first end, and the movable contact arranged at one end of the movable member moves to the side while remaining in contact with the first fixed contact on the base side, so that the movable contact slides against the fixed contact. In this way, the contact surface can be sufficiently wiped, and the insulating coating on the contact surface can be peeled off.

In the present invention , the support frame further includes an extension portion extending downward from the first end, the extension portion being aligned in the vertical direction with respect to the first columnar portion, and the first end and the extension portion being fixed to the base.

In the present invention, the height dimension of the connecting portion decreases from the first columnar portion side toward the second columnar portion side.

In the present invention, the connecting portion is a tapered member.

In the present invention, the other end of the movable member is bifurcated, one of the other ends being supported by a first pillar-shaped portion of the support frame, and the other of the other ends being supported by a second pillar-shaped portion of the support frame.

In the present invention, one end of the tension spring is attached to one end of the movable member, and the other end is attached to the actuator.

In the present invention, when the movable member is reversed, the movable member rotates around the other end of the tension spring, causing the movable contact to slide in the left-right direction relative to the fixed contact.

In the present invention, a restricting member is provided on the side of one end of the movable member to restrict the lateral movement of the one end of the movable member.

As described above, according to the present invention, the movable contact slides against the fixed contact when the contacts are switched, so the contact surface can be wiped sufficiently and the insulating coating on the contact surface can be peeled off.

FIG. 2 is a top perspective view showing the main components of a microswitch according to an embodiment of the present invention. FIG. 2 is a bottom perspective view of the microswitch (FIG. 1); FIG. 2 is a front perspective view showing main components of a microswitch according to an embodiment of the present invention, corresponding to FIG. 1 . FIG. 4 is a rear perspective view of the microswitch (FIG. 3). FIG. 4 is a front view of the microswitch (FIG. 3). FIG. 4 is a rear view of the microswitch (FIG. 3). FIG. 4 is a left side view of the microswitch (FIG. 3). FIG. 4 is a right side view of the microswitch (FIG. 3). FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 5 . FIG. 6 is a cross-sectional view taken along line X-X of FIG. FIG. 4 is a plan view of the microswitch (FIG. 3). FIG. 4 is an exploded view of the microswitch (FIG. 3). FIG. 4 is an overall perspective view of a common terminal in the microswitch (FIG. 3). This shows the microswitch (FIG. 3) in a state before the actuator is operated. In the microswitch (FIG. 3), the state immediately after the actuator is operated and before the movable member is reversed is shown. 16 is a cross-sectional view taken along line XVI-XVI of FIG. 14. 17 is a cross-sectional view taken along line XVII-XVII of FIG. 15 . FIG. 13 is a front view of a microswitch according to a fourth modified example of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
Figures 1 to 17 are diagrams for explaining a microswitch according to an embodiment of the present invention, with Figures 1 to 8 and 11 showing the main components of the microswitch according to this embodiment, Figures 9 and 10 being side cross-sectional views of the microswitch, Figure 12 being an exploded view of the microswitch, Figure 13 being a perspective view of the common terminal of the microswitch, and Figures 14 to 17 being diagrams for explaining the effects of this embodiment. In the following description, the longitudinal direction of the microswitch will be referred to as the front-rear direction, the lateral direction as the lateral or left-right direction, and the direction perpendicular to these as the vertical or height direction. That is, in the case of Figure 5 as an example, the left-right direction in the figure is the front-rear direction, the direction perpendicular to the paper surface of the figure is the lateral or left-right direction, and the vertical direction in the figure is the vertical direction.

As shown in Figures 1 to 8 and 12, the microswitch 1 of this embodiment comprises a base 2, which is an insulating base made of synthetic resin, and a common terminal 3, a normally open fixed terminal 4, and a normally closed fixed terminal 5, which are fixed integrally to the base 2 by insert molding. Each of these terminals extends vertically through the base 2, and the base end of each terminal has an external connection terminal 3A, 4A, 5A, respectively, which extends below the base 2.

The tip (switching end) of the normally open fixed terminal 4 has a normally open fixed contact (second fixed contact) 4b arranged above the base 2, and the tip (switching end) of the normally closed fixed terminal 5 has a normally closed fixed contact (first fixed contact) 5b arranged above the base 2 and facing the normally open fixed contact 4b. The normally open fixed contact 4b is fixed by crimping or the like to a contact mounting part 4a arranged above the base 2 and closer to the base 2. The normally closed fixed contact 5b is similarly fixed by crimping or the like to a contact mounting part 5a arranged above the base 2 and away from the base 2.

The tip of the common terminal 3 has a generally U-shaped (or generally C-shaped) support frame 30. The support frame 30 has a first columnar portion 30A extending in the vertical direction, a second columnar portion 30B disposed on the side of the first columnar portion 30A facing the first columnar portion 30A with a gap therebetween and similarly extending in the vertical direction, and a connecting portion 30C connecting the first and second columnar portions 30A, 30B in the horizontal direction.

As shown in Fig. 9, which is a cross section taken along line IX-IX in Fig. 5, and Fig. 10, which is a cross section taken along line XX in Fig. 5, in the support frame 30, a part of the first end _30A1 of the first columnar portion 30A to which one end of the connecting portion 30C is connected is embedded in the base 2 and fixed to the base 2, forming a fixed end. In contrast, the second end _30B1 of the second columnar portion 30B to which the other end of the connecting portion 30C is connected is not embedded in the base 2 (and therefore is not fixed to the base 2 and is a free end, i.e., free), and is disposed above the base 2. For this reason, the connecting portion 30C that connects the ends _30A1 , _30B1 in the left-right direction is disposed above the upper surface 2A of the base 2 with a gap therebetween.

Here, as shown in Fig. 13, the common terminal 3 is formed by bending a terminal plate three-dimensionally, and the support frame 30 is disposed in a direction substantially perpendicular to the direction of the external connection terminal 3A. As shown in the figure, the common terminal 3 has an extension portion _30A2 extending from the first end portion _30A1 of the first columnar portion 30A to below the connecting portion 30C. As shown in Figs. 9 and 10, the extension portion _30A2 is embedded in the base 2 and fixed to the base 2. Note that the common terminal 3 has three bending points BP between the extension portion _30A2 and the external connection terminal 3A (see Fig. 13), and the reason for this is as follows. The common terminal 3 is punched out in an expanded state in which it is connected integrally with the normally open fixed terminal 4 and the normally closed fixed terminal 5, and then, while maintaining the connected state of each terminal 3, 4, 5, each terminal 3, 4, 5 is bent through a fixing process of each contact 4b, 5b, and then each terminal 3, 4, 5 is insert molded into the base 2 and then separated.In this case, if the common terminal 3 is bent at only one point, the support frame 30 of the common terminal 3 will interfere with the adjacent normally open fixed terminal 4 in the expanded state, and this is to eliminate this.

In the example shown in FIGS. 9 and 10, the dimension in the height direction (vertical direction) of the connecting portion 30C, that is, the height, is expressed as follows, where the height at the first end portion _30A1 is _h1 and the height at the second end portion _30B1 is _h2 :
_h1 > _h2
is set to.

In the example shown in Figures 9 and 10, the height of the connecting portion 30C gradually decreases from the end portion _30A1 to the end portion _30B1 , and the connecting portion 30C is formed in a tapered shape when viewed from the front-rear direction.

1 to 8 and 12, the microswitch 1 is provided with a movable member 6 that has a movable contact 6a at one end and can swing up and down around the other end as a fulcrum. The movable contact 6a is composed of a movable contact _6a1 arranged on the upper side and a movable contact _6a2 arranged on the lower side, with the upper movable contact _6a1 being capable of contacting the normally closed fixed contact 5b and the lower movable contact _6a2 being capable of contacting the normally open fixed contact 4b.

As shown in Figures 11 and 12, the other end of the movable member 6 is bifurcated into two branches, each of which has a rear end surface 60b at its tip and a pair of left and right side walls 6A, 6B. Notches _6A1 , _6B1 are formed at the tip of each side wall 6A, 6B. Meanwhile, engaging recesses _30A3 , _30B3 are formed on the outer surfaces of the first and second columnar parts 30A, 30B of the support frame 30 on the base 2 side. The tip portions of the side walls 6A, 6B of the movable member 6 are engaged with the engaging recesses 30A3, 30B3 of the first and second columnar parts _30A , 30B of the support frame ₃₀ , respectively, so that the movable member 6 is supported by the engaging recesses _30A3 , _30B3 of the support frame 30 so as to be swingable up and down. At this time, the rear end faces 60b of the tip of the other end of the movable member 6 are in contact with the first and second columnar portions 30A and 30B (see FIG. 11).

As shown in Figures 1 to 6 and 12, the microswitch 1 is equipped with an actuator 7 for reversing the movable member 6 so as to move the movable contact 6a of the movable member 6 from an upper position on the normally closed fixed contact 5b side to a lower position on the normally open fixed contact 4b side. The actuator 7 is disposed in a direction that intersects with the movable member 6 (see Figures 5 and 6).

As shown in FIG. 12, the actuator 7 has a pair of support plate portions 7a, 7b at one end that protrude to the left and right. Meanwhile, the base 2 is provided with a pair of left and right receiving pedestals 20A, 20B that protrude upward, and each receiving pedestal 20A, 20B is formed with an engagement recess 20a, 20b, respectively. Each support plate portion 7a, 7b of the actuator 7 engages with each engagement recess 20a, 20b of the receiving pedestals 20A, 20B, respectively (see FIG. 5 and FIG. 6), and thus the actuator 7 is supported by each engagement recess 20a, 20b so that it can swing up and down. The actuator 7 also has an operating portion 71 at the other end that is operated from outside.

As shown in Figures 1 to 6, 11 and 12, the microswitch 1 has a tension coil spring (tension spring) 8. The tension coil spring 8 has hook portions 8a, 8b for locking at each end. The hook portion 8a of the tension coil spring 8 is locked to a locking protrusion 60a (Figure 12) provided on one end of the movable member 6, and the hook portion 8b is locked to a locking protrusion 70a (Figure 12) provided on the other end of the actuator 7. As a result, the tension force of the tension coil spring 8 acts between one end of the movable member 6 and the other end of the actuator 7.

As shown in FIG. 11, one end of the tension coil spring 8 is disposed between the first and second columnar parts 30A, 30B of the support frame 30. That is, the first and second columnar parts 30A, 30B of the support frame 30 are disposed on both the left and right sides of the tension coil spring 8. As shown in FIG. 12, the actuator 7 has a pair of left and right protruding parts 7c, 7d protruding upward in the center of the longitudinal direction. On the other hand, as shown in FIG. 13, the first and second columnar parts 30A, 30B of the support frame 30 have engagement recesses 30A ₄ , 30B ₄ formed on their inner surfaces, respectively. The protruding parts 7c, 7d of the actuator 7 are engaged with the engagement recesses 30A ₄ , 30B ₄ of the first and second columnar parts 30A, 30B of the support frame 30 (see FIG. 10), thereby restricting the actuator 7 from moving upward.

Next, the effects of this embodiment will be described with reference to FIGS.
Fig. 14 shows the state before the actuator 7 is operated in the microswitch 1, and Fig. 15 shows the state immediately after the actuator is operated. Fig. 16 is a cross-sectional view taken along line XVI-XVI in Fig. 14, and Fig. 17 is a cross-sectional view taken along line XVII-XVII in Fig. 15.

In the pre-operation state shown in Fig. 14, the movable contact _6a1 of the movable member 6 is in contact with the normally closed fixed contact 5b to close the circuit between the common terminal 3 and the normally closed fixed terminal 5, and a predetermined contact pressure is applied between the contacts by the biasing force of the tension coil spring 8. Also, at this time, as shown in Fig. 16, the axis _CL0 of the tension coil spring 8 substantially coincides with the center lines of the movable contact _6a1 and the normally closed fixed contact 5b of the movable member 6. In other words, the movable contact _6a1 and the normally closed fixed contact 5b are in a state in which their center lines substantially coincide when viewed from above.

When the actuator 7 is operated from this state, as shown in FIG. 15, the actuator 7 swings downward around the engaging recesses 20a, 20b (FIG. 12) of the receiving platforms 20A, 20B on the base 2 with which the supporting plate portions 7a, 7b (FIG. 12) on one end of the actuator 7 engage, and the operating portion 71 moves downward. As a result, the movable member 6 is reversed, and the movable member 6 attempts to move from an upper position on the normally closed fixed contact 5b side to a lower position on the normally open fixed contact 4b side.

In this case, immediately before the movable member 6 is reversed by the actuator 7, the movable contact 6a- ₁ of the movable member 6 is still in contact with the normally-closed fixed contact 5b as shown in Fig. 15. Then, as a result of the actuator 7 swinging downward, the distance between the locking projection 60a at one end of the movable member 6, with which the hook portion 8a of the tension coil spring 8 is locked, and the locking projection 70a at the other end of the actuator 7, with which the hook portion 8b is locked, becomes large, and therefore the tension coil spring 8 is stretched, increasing the tensile force on the one end of the movable member 6.

At this time, the pressing force acting from the other end of the movable member 6 increases on the first and second columnar portions 30A, 30B of the support frame 30, which abut against the rear end faces 60b of the other bifurcated end of the movable member 6. As described above, the first end _30A1 of the first columnar portion 30A is fixed to the base 2, and the second end _30B1 of the second columnar portion 30B is not fixed to the base 2. Therefore, when the pressing force acting from the other end of the movable member 6 increases, the second end _30B1 of the second columnar portion 30B deforms relatively more than the first end _30A1 of the first columnar portion 30A, resulting in a large amount of deformation. In other words, at this time, the second end _30B1 of the second columnar portion 30B is displaced relative to the first end 30A1 of the first columnar portion _30A , and the amount of displacement is greater than that of the first end _30A1 , and the second columnar portion 30B rotates around the first columnar portion 30A.

Moreover, in this case, as shown in FIG. 10, the height _h1 of the first end _30A1 is greater than the height _h2 of the second end _30B1 , and preferably the height of the connecting portion 30C gradually decreases from the first end _30A1 to the second end _30B1, so that the connecting portion 30C is formed in a tapered shape, and therefore the displacement amount of the second end _30B1 is even greater than the displacement amount of the first end _30A1 .

In addition, since the first end _30A1 of the first columnar portion 30A is a fixed end and the second end _30B1 of the second columnar portion 30B is a free end, when the pressing force acting on each columnar portion 30A, 30B from the other end of the movable member 6 increases, the amount of displacement of the second end 30B1 of the second columnar portion 30B is greater than the amount of displacement of the first end _30A1 of the first columnar portion _30A .

17, under the action of the tension force of the tension coil spring 8, one end of the movable member 6 is displaced so as to shift laterally around the other end (i.e., rotated laterally). At this time, since the hook 8a on one end of the tension coil spring 8 is engaged with the locking protrusion 60a on one end of the movable member 6, the lateral displacement of the movable member 6 also displaces one end of the tension coil spring 8 laterally. As a result, as shown by the dashed and double-dashed lines in the figure, the axis _CL1 of the tension coil spring 8 is displaced laterally from the axis _CL0 around the other end of the tension coil spring 8, displacing in a direction intersecting with the axis _CL0 . Accordingly, the movable contact _6a1 (similarly the movable contact _6a2 ) on one end of the movable member 6 is displaced in a direction intersecting with the axis _CL0 of the tension coil spring 8 while maintaining a state of contact with the fixed contact 5b. At this time, as shown in the figure, the movable contact 6a ₁ (and similarly the movable contact 6a ₂ ) is displaced laterally relative to the normally closed fixed contact 5b (i.e., rotates laterally) and slides against the normally closed fixed contact 5b.

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

When the actuator 7 is operated further beyond the state shown in FIG. 15, the movable member 6 is inverted and moves from an upper position on the normally closed fixed contact 5b side to a lower position on the normally open fixed contact 4b side, thereby switching the contacts.

[First Modification]
10, an example has been shown in which a part of the first end 30A1 of the first columnar portion 30A of the support frame ₃₀ is embedded in the base 2 and fixed to the base 2, but the application of the present invention is not limited to this. The part embedded in the base 2 and fixed to the base 2 may be the entire first end _30A1 .

[Second Modification]
In the above embodiment, the extension portion _30A2 of the common terminal 3 is disposed from the first end 30A1 of the first columnar portion _30A below the connecting portion 30C, i.e., on the extension line of the first end _30A1 (see Figs. 9, 10, and 13), but the application of the present invention is not limited to this. The extension portion _30A2 may be disposed at a position offset to the side of the first end _30A1 . In this case, the extension portion _30A2 is preferably disposed between the center line of the support frame 30 and the center line of the first columnar portion 30A, and in this case, the extension portion _30A2 is extended downward from the connecting portion 30C between the center line of the support frame 30 and the center line of the first columnar portion 30A. In this case, the first end 30A ₁ of the first columnar portion 30A is embedded in the base 2 , whereas the extension portion 30A ₂ may or may not be embedded in the base 2 .

[Third Modification]
In the above embodiment, an example was shown in which the extension portion _30A2 was provided between the supporting frame 30 and the external connection terminal 3A below, but this extension portion _30A2 may be omitted. In that case, the common terminal 3 is composed of two components, the supporting frame 30 and the external connection terminal 3A, and these components are arranged separately, but these components may be electrically connected by, for example, a jumper wire.

[Fourth Modification]
FIG. 18 shows a microswitch according to a fourth modified example of the present invention, in which the same reference numerals as those in the above-described embodiment designate the same or corresponding parts.

In the microswitch 1 shown in FIG. 18, a protrusion 9 is provided at the top of an extension 5c that extends upward from a base 2 so as to support a contact mounting portion 5a of a normally closed fixed contact 5b from below, and protrudes inward (to the left in the figure). The protrusion 9 is disposed at a predetermined distance from one end of the movable member 6 at a position to the side of the one end of the movable member 6 (toward the back of the paper in the figure), and overlaps with the one end of the movable member 6 when viewed from the front. The protrusion 9 functions as a restricting portion for restricting the lateral movement of the one end of the movable member 6. In the above embodiment, a similar protrusion is shown, but it is not disposed to the side of one end of the movable member 6, and does not overlap with the one end of the movable member 6 when viewed from the front.

The reason for providing the protrusion 9 as such a restricting portion is as follows.
One end of the movable member 6 on the free end side may move excessively to the side due to vibrations and shocks during transportation of the microswitch 1, or due to shocks when the microswitch 1 is dropped during installation. In addition, when the movable contact 6a on one end of the movable member 6 returns from a lower position on the normally open fixed contact 4b side to an upper position on the normally closed fixed contact 5b side, the movable contact 6a tries to displace relative to the normally closed fixed contact 5b in the opposite direction to the displacement direction during the above-mentioned reversal operation, so that the amount of lateral movement of one end of the movable member 6 may become large due to inertia at that time. In such a case, by abutting one end of the movable member 6 against the protrusion 9, the amount of lateral movement of one end of the movable member 6 is prevented from becoming excessive, and the other end of the movable member 6 is prevented from coming off the first and second columnar parts 30A and 30B of the support frame 30.

[Other Modifications]
The above-described embodiment and each modification should be considered in all respects as merely illustrative of the present invention, and not restrictive. Those skilled in the art to which the present invention pertains may, when considering the teachings above, construct various modifications and other embodiments that incorporate the principles of the present invention without departing from the spirit and essential characteristics of the present invention, even if not expressly described herein.

The present invention is useful for microswitches used as detection switches, operation switches, etc.

1: Microswitch

2: Bass

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

6: Movable member _6a1 , _6a2 , 6a: Movable contact

7: Actuator

8: Tension coil spring (tension spring)

9: Protrusion ( regulating member )

30: Support frame 30A: First columnar portion
_30A1 : First end portion 30B: Second columnar portion
_30B1 : Second end 30C: Connection portion

CL ₀ , CL ₁ : Axis line

Japanese Utility Model Application Publication No. 63-129928 (see pages 2 to 4, Figures 4 and 5)

Claims (8)

In micro switches,
a movable member having at one end a movable contact capable of coming into contact with first and second fixed contacts disposed apart from each other and fixed to a base, and the other end of which is supported by a support frame so as to be capable of swinging;
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 disposed in a front-rear direction so as to apply a tension force to the one end of the movable member,
the support frame is configured in a generally U-shape or a generally C-shape including a first columnar portion disposed on either the left or right side of the tension spring, the first columnar portion having a first end and extending upward from the first end, a second columnar portion disposed on the other left or right side of the tension spring, the second columnar portion having a second end and extending upward from the second end, and a connecting portion connecting the first end and the second end,
only the first end is a fixed end fixed to the base, and the second end is a free end not fixed to the base, and a structural member consisting of the first end, the connecting portion and the second end is cantilevered on the base by the first end,
During a reversal operation of the movable member, under the action of the tensile force of the tension spring, the second end portion pivots around the first end portion via the connecting portion within a horizontal plane, whereby the second columnar portion rotates around the first end portion via the connecting portion, thereby displacing the movable contact in the left-right direction relative to the first fixed contact .
A microswitch characterized by: In claim 1,
The support frame further includes an extension portion extending downward from the first end portion, the extension portion being aligned in the up-down direction with respect to the first columnar portion, and the first end portion and the extension portion being fixed to the base.
A microswitch characterized by: In claim 1,
a dimension in a height direction of the connecting portion becomes smaller from the side of the first columnar portion toward the side of the second columnar portion ;
A microswitch characterized by: In claim 3 ,
The connecting portion is a tapered member .
A microswitch characterized by: In claim 1,
the other end of the movable member is bifurcated, one of the other ends is supported by the first pillar-shaped portion of the support frame, and the other of the other ends is supported by the second pillar-shaped portion of the support frame;
A microswitch characterized by: In claim 1 ,
One end of the tension spring is engaged with the one end of the movable member, and the other end is engaged with the actuator .
A microswitch characterized by: In claim 1 ,
When the movable member is reversed, the movable member rotates around the other end of the tension spring, causing the movable contact to slide in the left-right direction relative to the fixed contact .
A microswitch characterized by: In claim 1 ,
a restricting member is provided on a side of the one end of the movable member to restrict lateral movement of the one end of the movable member ;
A microswitch characterized by:

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