Switch

Abstract

To provide a switch which can suppress inclination of an operation plate so that the operation plate can be energized by a differential pressure plate.SOLUTION: A switch 1 comprises: an operation plate 107 which rotates, upon receiving external force F1, around a rotary shaft 109 against energizing force F3, thereby switching a conduction state of a switch component with operation force F2 corresponding to the external force F1; and a differential pressure plate 108 which energizes an energized portion 107d, located away from the rotary shaft 109 on the operation plate 107, with adjustment force F4 in a direction reverse to the biasing force F3, thereby adjusting the operation force F2 on the operation plate 107 with respect to the external force F1. While coming into contact with the energized portion 107d on the operation plate 107, the differential pressure plate 108 is pivotally supported around the rotary shaft 109 in a manner held at both ends in a width direction Y of the operation plate 107 and is imparted with the adjustment force F4, thereby energizing the energized portion 107d with the adjustment force F4.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a switch. [Background technology]

[0002] Conventionally, switches used in devices and the like in machinery and the like have been known in which an external force is received by an actuating plate, which is then transmitted to a switch component to switch the conductive state of a contact (see, for example, Patent Document 1). The switch in Patent Document 1 is provided with a differential pressure plate that biases the actuating plate to adjust the operating force of the actuating plate in response to the external force. This differential pressure plate is located on one side of the actuating plate and is configured to bias a biased portion that extends in a branch-like manner from the side edge of the actuating plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] China Utility Model Registration No. 211236707 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the switch described in Patent Document 1, the biasing force of the actuating plate by the differential pressure plate is applied to one side of the actuating plate, which may result in the actuating plate becoming tilted. If the actuating plate becomes tilted, the operating force of the actuating plate adjusted by the differential pressure plate may deviate from the target setting value, which is undesirable.

[0005] An object of the present invention is to provide a switch in which the tilt of the operating plate can be suppressed and the operating plate can be biased by the differential pressure plate. [Means for solving the problem]

[0006] In order to solve the problem and achieve the object, the switch comprises a switch component, an actuating member that is rotatable around a predetermined rotation axis and is biased by a first biasing member that applies a first biasing force in a direction opposite to a predetermined external force, and that, when subjected to the external force, rotates around the rotation axis against the first biasing force to switch the conductive state of the switch component with an operating force corresponding to the external force, and an adjusting member that adjusts the operating force of the actuating member in response to the external force by biasing a biased portion of the actuating member that is away from the rotation axis with an adjusting force such that the biased portion rotates in a direction opposite to the rotation direction of the first biasing force, and the adjusting member is rotatably supported in a double-supported state in the width direction of the adjusting member, and a second biasing force is applied by a second biasing member, thereby biasing the biased portion with the adjusting force. It is also preferable that the first biasing member is a compression spring. It is also preferable that the second biasing member is a tension spring. It is further preferable that the adjustment member includes a pulled portion to which the second urging force is applied, and an urging portion that urges the urged portion. Furthermore, it is preferable that the adjustment member has a biasing portion that biases the biased portion and a pair of pivoting arms extending from both ends of the biasing portion in the width direction, and that the pair of pivoting arms be supported rotatably so that the adjustment member is supported in a double-supported state in the width direction.

[0007] According to the above switch, the differential pressure plate is supported on both ends of the width direction of the actuating plate so as to be rotatable about the same rotation axis as the actuating plate, and the biased portion of the actuating plate is biased by the applied adjustment force. Because the differential pressure plate is supported on both ends of the width direction of the actuating plate and an adjustment force is applied, tilt of the differential pressure plate due to the adjustment force is suppressed, and tilt of the actuating plate biased by this differential pressure plate is also suppressed. In other words, according to the above switch, the actuating plate can be biased by the differential pressure plate while suppressing tilt of the actuating plate.

[0008] Here, it is preferable that the differential pressure plate contacts the center of the biased portion in the width direction.

[0009] According to this configuration, the differential pressure plate comes into contact with the central portion in the width direction of the biased portion, so that the tilt of the operating plate biased by the differential pressure plate can be further suppressed.

[0010] It is also preferable that the differential pressure plate be in point contact with the biased portion.

[0011] With this configuration, even if the differential pressure plate is tilted due to the application of adjustment force, the contact with the biased portion is point contact, so the impact of the tilting of the differential pressure plate on the operating plate can be reduced.

[0012] Furthermore, the differential pressure plate has a slit that penetrates the biased portion of the operating plate and is wider than the plate thickness of the biased portion, and a part of the inner edge of the slit serves as a contact inner edge that contacts the biased portion, and it is even more preferable that the contact inner edge is an arc-shaped edge that convex toward the inside of the slit and that the arc-shaped contact inner edge makes point contact with the biased portion.

[0013] According to this configuration, the contact portion of the differential pressure plate with the biased portion of the operating plate is the arc-shaped inner contact edge of the slit, so that the differential pressure plate can be brought into effective point contact with the operating plate.

[0014] It is also preferable that the adjusting force is applied to a central portion of the differential pressure plate in the width direction.

[0015] According to this configuration, the tilt of the differential pressure plate is further suppressed by applying an adjustment force to the center of the differential pressure plate, so that the tilt of the operating plate that is biased by the adjustment force from this differential pressure plate can be further suppressed. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide a switch in which the tilt of the operating plate can be suppressed and the operating plate can be biased by the differential pressure plate. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 2 illustrates a switch according to an embodiment. [Figure 2] 2 is an exploded perspective view showing the mounting structure of the actuation plate and the differential pressure plate in the switch shown in FIG. 1. FIG. [Figure 3] 3 is an explanatory view for explaining the engagement relationship between the operating plate and the differential pressure plate shown in FIGS. 1 and 2.

[0023] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] An embodiment of the switch will be described below with reference to FIGS.

[0019] Fig. 1 is a diagram showing a switch according to one embodiment, and Fig. 2 is an exploded perspective view showing the mounting structure of the actuating plate and differential pressure plate in the switch shown in Fig. 1. Fig. 1(A) shows a side view of the switch 1, and Fig. 1(B) shows a front view of the switch 1. Note that Fig. 1 shows the switch 1 with the outermost cover removed so that the internal structure of the switch 1 can be seen. Fig. 3 is an explanatory diagram for explaining the engagement relationship between the actuating plate and differential pressure plate shown in Figs. 1 and 2.

[0020] The switch 1 according to this embodiment is used, for example, as a pressure switch for detecting the pressure of a refrigerant in a compressor of a refrigeration cycle. The switch 1 has an overall rectangular block-like appearance and includes a main body frame 101, a reinforcing plate 102, a range spring support plate 103, a differential pressure spring support plate 104, a range spring 105, and a differential pressure spring 106 inside a cover (not shown). The switch 1 also includes an actuation plate 107, a differential pressure plate 108, a rotating shaft 109, an element 110, and a switch component 150. The switch 1 also includes two switch components 150 housed side by side inside the main body frame 101, thereby forming a dual-type microswitch 160. Therefore, the element 110, which serves as an introduction portion for an external force F1 that switches the conductive state of the switch component 150, is also provided in a position corresponding to the two switch components 150.

[0021] In this embodiment, of the two switch components 150, one switch component 150 shown on the left side of the front view of FIG. 1(B) is provided with the structure shown in FIGS. 2 and 3 as a structure for switching the conduction state in response to an external force F1 from the element 110. Hereinafter, the switch 1 of this embodiment will be described, focusing on the structure for switching the conduction state for this one switch component 150. In FIGS. 1 to 3, the expansion / contraction direction of the range spring 105 and the differential pressure spring 106 is indicated by arrow Z and is referred to as the "vertical direction Z." One side of the vertical direction Z is referred to as the "upper side Z1," and the other side is referred to as the "lower side Z2." Furthermore, the horizontal direction is indicated by arrows X and Y and is referred to as the "front-rear direction X" and the "width direction Y," respectively. One side of the front-rear direction X is referred to as the "front side X1," and the other side is referred to as the "rear side X2." This is merely for the convenience of explanation, and does not necessarily match the directions in the actual state of use of the switch 1, and does not limit the directions in the actual state of use of the switch 1.

[0022] The microswitch 160 is a roughly rectangular block-shaped switch element, and two switch components 150 are housed side by side in the width direction Y inside the main body frame 101. One of the switch components 150, shown on the left side of the front view in Fig. 1(B), is provided with a micro actuation plate 151 that receives an operating force F2 from the actuation plate 107 in response to an external force F1 from the element 110, as shown in Fig. 1(A). This micro actuation plate 151 is a strip-shaped member with one end serving as a pivot end 151a and the other end as a movable end 151b, and the conductive state of the internal switch mechanism is switched by pressing and releasing the pressing on the movable end 151b.

[0023] The element 110 is an element that deforms the internal bellows in the vertical direction Z in response to pressure changes of the pressurized fluid introduced through the joint pipe 111, and applies this deformation to the operating plate 107 as an external force F1.

[0024] The main body frame 101 is a frame member formed by bending a rectangular metal plate into a C-shape in side view, and two switch components 150 are arranged inside the main body frame 101 side by side in the width direction Y. In addition, one element 110 is attached to the side wall 101a on the lower side Z2 at a position corresponding to each switch component 150, with a coupling pipe 111 protruding outward.

[0025] Hereinafter, a switching structure for the conduction state for one switch component 150 on the left side of FIG. 1(B) in the width direction Y within the main body frame 101 will be described.

[0026] 1(A), the reinforcing plate 102 is a frame member formed by bending a rectangular metal plate into a C-shape in side view, and is fitted next to one switch component 150 in the width direction Y within the main frame 101. Inside the reinforcing plate 102, a range spring receiving plate 103, a differential pressure spring receiving plate 104, a range spring 105, a differential pressure spring 106, an operating plate 107, a differential pressure plate 108, and a rotating shaft 109 are arranged.

[0027] The range spring receiving plate 103 is a metal plate that is disposed next to the switch component 150 in the width direction Y within the main frame 101 and abuts against and holds the upper Z1 end of the range spring 105. The range spring receiving plate 103 is screwed onto a range adjustment bolt 103a that hangs down in the vertical direction Z from the side wall 101b on the upper Z1 side of the main frame 101 inside the range spring 105 so that its position in the vertical direction Z can be adjusted. Adjusting the position of the range spring receiving plate 103 adjusts the amount of compression of the range spring 105, which is a compression spring. This adjusts the biasing force F3 applied by the range spring 105 to the operating plate 107, and as a result, adjusts the operating force F2 of the switch component 150 applied by the operating plate 107 in response to the external force F1 from the element 110.

[0028] The differential pressure spring receiving plate 104 is a metal plate located within the main frame 101, adjacent to the switch component 150 in the width direction Y and on the front side X1 of the differential pressure spring receiving plate 104 in the front-rear direction X. The differential pressure spring receiving plate 104 is connected to an end of the differential pressure spring 106 on the upper side Z1 to hold that end. The differential pressure spring receiving plate 104 is screwed onto a differential pressure adjustment bolt 104a that hangs down in the vertical direction Z from the side wall 101b on the upper side Z1 of the main frame 101 inside the differential pressure spring 106 so that its position in the vertical direction Z can be adjusted. Adjusting the position of the differential pressure spring receiving plate 104 adjusts the extension amount of the differential pressure spring 106, which is a tension spring. This increases or decreases the adjustment force F4 of the differential pressure plate 108, which is biased in the vertical direction Z by the differential pressure spring 106, relative to the operating force F2 of the operating plate 107.

[0029] Range spring 105 is a compression spring interposed between range spring receiving plate 103 and operating plate 107, with range adjustment bolt 103a passing through the interior. Range spring 105 urges operating plate 107 in the opposite direction to external force F1 from element 110 with urging force F3 adjusted by range spring receiving plate 103.

[0030] The differential pressure spring 106 is a tension spring having one end connected to the differential pressure spring receiving plate 104 with the differential pressure adjustment bolt 104a passing through the interior, and the other end connected to the differential pressure plate 108. The differential pressure spring 106 applies a biasing force according to the amount of extension adjusted by the differential pressure spring receiving plate 104 as an adjustment force F4 to the operating plate 107 by pulling up the differential pressure plate 108 in the same direction as the external force F1 from the element 110.

[0031] The actuation plate 107 is a plate member that receives an external force F1 from the element 110. The actuation plate 107 switches the conductive state of the switch mechanism of the switch component 150 by pressing or releasing a movable end 151b of a micro actuation plate 151 in the switch component 150 in response to the external force F1. As shown in FIG. 2 , the actuation plate 107 is formed by connecting an actuation receiving plate 107a that receives the external force F1 from the element 110 and a pressing arm 107b that presses the micro actuation plate 151 so as to form an L-shape in a side view from the width direction Y. In addition, a pair of bearing portions 107c through which a rotation shaft 109 penetrates in the width direction Y is provided near the connecting end of the actuation receiving plate 107a with the pressing arm 107b. The actuation plate 107 is supported by the pair of bearing portions 107c on the reinforcing plate 102 so as to be rotatable about the rotation shaft 109. The actuation receiving plate 107a is biased by the range spring 105 with a biasing force F3 in the opposite direction to the external force F1. When the sum of the external force F1 from the element 110 and the adjusting force F4 from the differential pressure plate 108 is greater than the biasing force F3 from the range spring 105, the actuation receiving plate 107 rotates around the pivot shaft 109 against the biasing force F3. This rotation causes the pressing arm 107b to press the movable end 151b of the micro actuation plate 151. Conversely, when the sum of the external force F1 and the adjusting force F4 is smaller than the biasing force F3 from the range spring 105, the actuation plate 107 rotates in the opposite direction due to the biasing force F3, and the pressing of the pressing arm 107b on the micro actuation plate 151 is released. This rotation in response to the external force F1 from the element 110 causes the actuation plate 107 to switch the conductive state of the switch component 150.

[0032] The differential pressure plate 108 biases the biased portion 107d, which is located away from the rotation shaft 109 on the actuation receiving plate 107a of the actuation plate 107, with an adjusting force F4 in the opposite direction to the biasing force F3 from the range spring 105. As described above, this adjusting force F4 is applied by pulling up the differential pressure spring 106. Furthermore, the biased portion 107d on the actuation plate 107 is the tip end of the actuation receiving plate 107a on the side opposite to the rotation shaft 109. The differential pressure plate 108 adjusts the operating force F2 of the actuation plate 107 in response to the external force F1 from the element 110 by pulling up the biased portion 107d with the adjusting force F4 applied by the differential pressure spring 106. That is, the operating force F2 of the operating plate 107 on the micro operating plate 151 is adjusted to the difference between the sum of the external force F1 from the element 110 and the adjusting force F4 by the differential pressure plate 108 and the biasing force F3 from the range spring 105.

[0033] 2, the differential pressure plate 108 includes a biasing portion 108a that contacts and biases the biased portion 107d of the actuation plate 107, and a pair of pivoting arms 108b. The pair of pivoting arms 108b are arm portions that extend from both ends of the biasing portion 108a in the width direction Y, and each extending end 108c is passed through a pivot shaft 109, so that the pair of pivoting arms 108b are pivotally supported on the reinforcing plate 102 in a double-supported state so as to be rotatable about the pivot shaft 109.

[0034] The pivot shaft 109 is an axial member that penetrates, in this order, a pair of bearing flanges 102a provided on the reinforcing plate 102, a pair of pivot arms 108b of the differential pressure plate 108, and a pair of bearing portions 107c of the operating plate 107 in the width direction Y. The operating plate 107 and the differential pressure plate 108 are coaxially supported on the reinforcing plate 102 by this pivot shaft 109.

[0035] In this embodiment, the biased portion 107d of the actuating plate 107 is a tongue-shaped protruding end portion at the tip end of the actuation receiving plate 107a, with the central portion in the width direction Y protruding toward the front side X1. The differential pressure plate 108 makes point contact with this biased portion 107d, as shown in FIG. 3. The biased portion 108a of the differential pressure plate 108 has a bridge portion 108d connecting the opposite ends of the pair of rotating arms 108b in the width direction Y from the extended ends 108c, and a rectangular plate-shaped biasing wall portion 108e hanging down to the lower side Z2. Furthermore, in the biased portion 108a, a triangular plate-shaped pulled portion 108f extends from the central portion of the bridge portion 108d in the width direction Y to the upper side Z1. In the differential pressure plate 108, the biased portion 108a and the pair of rotating arms 108b are formed by bending a flattened metal plate.

[0036] Furthermore, the biasing wall portion 108e of the biasing portion 108a of the differential pressure plate 108 is provided with a slit 108e-1 that is wider than the plate thickness of the biased portion 107d of the operating plate 107. The biased portion 107d of the operating plate 107 penetrates this slit 108e-1. The inner edge of the lower side Z2, which is part of the inner edge of this slit 108e-1, serves as a contact inner edge 108e-2 that contacts the biased portion 107d. Here, the contact inner edge 108e-2 is an arc-shaped edge that convex toward the inside of the slit 108e. The differential pressure plate 108 comes into point contact with the biased portion 107d at a contact point P1 on this arc-shaped contact inner edge 108e-2.

[0037] The lower end hook 106a (FIG. 1) of the differential pressure spring 106 is hooked into the locking hole 108f-1 provided in the pulled portion 108f extending from the center in the width direction Y of the bridge portion 108d of the biasing portion 108a, and an adjustment force F4 is applied.

[0038] According to the switch 1 of the embodiment described above, the differential pressure plate 108 is supported at both ends of the actuating plate 107 in the width direction Y so as to be rotatable about the same rotation axis 109 as the actuating plate 107. The differential pressure plate 108 biases the biased portion 107d of the actuating plate 107 by the applied adjustment force F4. Because the differential pressure plate 108 is supported at both ends and the adjustment force F4 is applied to it, tilting of the differential pressure plate 108 due to the adjustment force F4 is suppressed, and tilting of the actuating plate 107 biased by the differential pressure plate 108 is also suppressed. In other words, according to the switch 1 described above, the actuating plate 107 can be biased by the differential pressure plate 108 while suppressing tilting of the actuating plate 107.

[0039] Here, in this embodiment, the differential pressure plate 108 comes into contact with the center of the biased portion 107d of the operating plate 107 in the width direction Y. According to this configuration, the differential pressure plate 108 comes into contact with the center of the biased portion 107d in the width direction Y, and therefore, the tilt of the operating plate 107 biased by the differential pressure plate 108 can be further suppressed.

[0040] Furthermore, in this embodiment, the differential pressure plate 108 is in point contact with the biased portion 107d of the actuating plate 107. According to this configuration, even if the differential pressure plate 108 is tilted by the application of the adjustment force F4, the contact with the biased portion 107d is point contact, and therefore the influence of the tilt of the differential pressure plate 108 on the actuating plate 107 can be suppressed.

[0041] Furthermore, in this embodiment, the differential pressure plate 108 is provided with a slit 108e-1 that penetrates the biased portion 107d of the actuating plate 107, and a part of the inner edge of the slit 108e-1 serves as a contact inner edge 108e-2 that contacts the biased portion 107d. The contact inner edge 108e-2 is an arc-shaped edge that convex toward the inside of the slit 108e-1, and the differential pressure plate 108 comes into point contact with the biased portion 107d at the arc-shaped contact inner edge 108e-2. With this configuration, the contact portion of the differential pressure plate 108 with the biased portion 107d of the actuating plate 107 is the arc-shaped contact inner edge 108e-2 in the slit 108e-1, so that the differential pressure plate 108 can be effectively brought into point contact with the actuating plate 107.

[0042] Furthermore, in this embodiment, an adjustment force F4 is applied to the center of the differential pressure plate 108 in the width direction Y. According to this configuration, the application of the adjustment force F4 to the center of the differential pressure plate 108 further reduces the tilt of the differential pressure plate 108, and therefore the tilt of the operating plate 107, which is biased by the adjustment force F4 from the differential pressure plate 108, can be further reduced.

[0043] The above-described embodiments merely show typical embodiments of the present invention, and the present invention is not limited to these. In other words, various modifications can be made without departing from the gist of the present invention. As long as such modifications still include the switch configuration of the present invention, they are of course included in the scope of the present invention.

[0044] For example, in the above-described embodiment, the switch 1 includes a dual-type microswitch 160 used as a pressure switch. In this switch 1, pressure changes in the pressure fluid are transmitted to the actuation plate 107 via a bellows in the element 110. However, the switch is not limited to this, and may be used as various switches other than a pressure switch, as long as the actuation plate receives some kind of external force and switches the conductive state of a switch component with an operating force corresponding to the external force. Even when used as a pressure switch, pressure changes may be transmitted to the actuation plate via a member other than a bellows, such as a diaphragm. The switch type is also not limited to a dual type, and may be a single type having only one switch component.

[0045] In the above-described embodiment, one switch component 150 whose conduction state is switched via a micro-actuation plate 151 is exemplified as an example of a switch component. However, the switch component is not limited to this, and any specific switch mode is acceptable.

[0046] In the above-described embodiment, the differential pressure plate 108 is a bent product having the biasing portion 108a and the pair of pivot arms 108b. However, the differential pressure plate is not limited to this, and any specific shape may be used as long as it is supported by a shaft in a double-supported state.

[0047] Furthermore, in the above-described embodiment, the differential pressure plate 108 that contacts the center portion of the biased portion 107d of the operating plate 107 in the width direction Y is exemplified as an example of the differential pressure plate. However, the differential pressure plate is not limited to this, and may contact a position shifted from the center portion of the operating plate in the width direction. However, as described above, the differential pressure plate 108 contacting the center portion of the operating plate 107 in the width direction Y can further suppress the tilt of the operating plate 107.

[0048] Furthermore, in the above-described embodiment, the differential pressure plate 108 that comes into point contact with the biased portion 107d of the operating plate 107 is exemplified as an example of the differential pressure plate. However, the differential pressure plate is not limited to this, and may come into line contact or surface contact with the operating plate. However, as described above, by bringing the differential pressure plate 108 into point contact with the operating plate 107, even if the differential pressure plate 108 were to tilt, the effect on the operating plate 107 can be suppressed.

[0049] Furthermore, in the above-described embodiment, as an example of point contact of the differential pressure plate with the actuating plate, a form in which the arc-shaped contact inner edge 108e-2 of the slit 108e-1 provided in the differential pressure plate 108 makes point contact with the biased portion 107d of the actuating plate 107 is exemplified. However, the form of point contact is not limited to this, and any specific contact form is not required. However, as described above, by making point contact with the actuating plate 107 at the arc-shaped contact inner edge 108e-2 of the slit 108e-1, the differential pressure plate 108 can be effectively brought into point contact with the actuating plate 107.

[0050] Furthermore, in the above-described embodiment, the differential pressure plate 108 in which the adjustment force F4 is applied to the center in the width direction Y is exemplified as an example of a differential pressure plate. However, the differential pressure plate is not limited to this, and the adjustment force may be applied to a position shifted from the center in the width direction. However, as described above, by applying the adjustment force F4 to the center in the width direction Y, the tilt of the operating plate 107 can be further suppressed. [Explanation of symbols]

[0051] 1 Switch 101 Main frame 101a,101b side wall 102 Reinforcement plate 103 Range spring support plate 103a Range adjustment bolt 104 Differential pressure spring support plate 104a Differential pressure adjustment bolt 105 range spring 106 Differential pressure spring 106a Bottom hook 107 Actuating plate 107a Operating plate 107b Pressing arm 107c Bearing section 107d Forced part 108 Differential pressure plate 108a Biasing part 108b Rotating arm 108c Extended end 108d Bridge section 108e Biasing wall section 108e-1 slit 108e-2 Inner edge of contact 108f Towed part 108f-1 Locking hole 109 Rotating shaft 110 Elements 111 Joint pipe 150 Switch parts 151 Micro Actuation Plate 151a Rotating shaft end 151b Movable end 160 マイクロスイッチ F1 external forces F2 action force F3 Pay Power F4 adjustment force P1 contact point X front-to-back direction X1 front X2 rear Y width direction Z up and down direction Z1 upper side Z2 bottom side

Claims

1. Switch parts, an actuating member that is rotatable about a predetermined rotation axis and is biased by a first biasing member that applies a first biasing force in a direction opposite to a predetermined external force, and that, when subjected to the external force, rotates about the rotation axis against the first biasing force, thereby switching the conductive state of the switch component with an operating force corresponding to the external force; an adjustment member that adjusts the operating force of the operating member in response to the external force by biasing a biased portion of the operating member that is distant from the rotation axis with an adjustment force that causes the biased portion to rotate in a direction opposite to the rotation direction caused by the first biasing force; Equipped with The adjustment member is supported rotatably in a double-supported state in the width direction of the adjustment member, and a second biasing force is applied by a second biasing member, thereby biasing the biased portion with the adjustment force.

2. 2. The switch of claim 1, wherein said first biasing member is a compression spring.

3. 2. The switch of claim 1, wherein the second biasing member is a tension spring.

4. 4. The switch according to claim 3, wherein the adjustment member includes a pulled portion to which the second biasing force is applied, and a biasing portion that biases the biased portion.

5. The switch described in claim 1, characterized in that the adjustment member has a biasing portion that biases the biased portion and a pair of pivoting arms extending from both widthwise ends of the biasing portion, and the pair of pivoting arms are supported rotatably, so that the adjustment member is supported in a double-supported state in the widthwise direction.

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