CN116368591A - Micro-switch - Google Patents
Micro-switch Download PDFInfo
- Publication number
- CN116368591A CN116368591A CN202180069599.2A CN202180069599A CN116368591A CN 116368591 A CN116368591 A CN 116368591A CN 202180069599 A CN202180069599 A CN 202180069599A CN 116368591 A CN116368591 A CN 116368591A
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- Prior art keywords
- contact
- movable member
- movable
- support frame
- fixed
- Prior art date
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- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/22—Operating parts, e.g. handle
- H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
- H01H21/28—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/02—Details
- H01H21/18—Movable parts; Contacts mounted thereon
- H01H21/36—Driving mechanisms
- H01H21/40—Driving mechanisms having snap action
- H01H21/42—Driving mechanisms having snap action produced by compression or extension of coil spring
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Push-Button Switches (AREA)
- Contacts (AREA)
- Switches With Compound Operations (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention aims to sufficiently rub the contact surface to peel off an insulating coating on the contact surface when switching the contact. The microswitch 1 is provided with: a movable member 6 having a movable contact 6a at one end capable of contacting the first and second fixed contacts 5b and 4b arranged in a spaced-apart manner and fixed to the base 2, and having the other end swingably supported by the support frame 30; an actuator 7 for reversing the movable member 6 to move the movable contact 6 from the first fixed contact 5b side to the second fixed contact 4b side; and a tension spring 8 that applies a tension force to one end of the movable member 6. The support frames 30 are disposed on both sides so as to sandwich the tension springs 8, and the first end portions 30A of the support frames 30 on one side of the tension springs 8 1 A supporting frame fixed on the other side of the base 2 and the tension spring 8Second end 30B of 30 1 Not fixed to the base 2.
Description
Technical Field
The present invention relates to a micro switch used as a detection switch, an operation switch, or the like.
Background
The microswitch described in Japanese Kokai publication Sho-63-129928 is provided with: a general terminal (2), a normally open terminal (3) and a normally closed terminal (4), which are fixed to the switch base (1); a movable contact piece (5) which is arranged between a normally open contact (3 b) of a normally open terminal (3) and a normally closed contact (4 b) of a normally closed terminal (4), and one end of which is provided with switching contacts (5 a, 5 b) which can be contacted with one of the terminals; a rotatable actuator (6) for rotating the movable contact piece (5); and a reversing spring (7) which is suspended and arranged between the movable contact piece (5) and the actuator (6) (pages 2-4, fig. 4 and fig. 5 of the publication).
In the microswitch, when the actuator (6) is pushed downward, the reversing spring (7) reverses and the movable contact piece (5) moves downward, whereby the contact is switched so that the switching contact (5 b) is brought into contact with the normally open contact (3 b) (see the two-dot chain line in fig. 4 of the above publication).
Prior art literature
Patent literature
Patent document 1: japanese Kokai publication Sho-63-129928 (see pages 2-4, FIGS. 4 and 5)
Disclosure of Invention
However, in such a micro switch, an insulating film may be formed on the contact surface by oxidation or vulcanization, and in this case, the reliability as a switch may be lowered. To prevent oxidation or vulcanization of the contact surface, it is also considered to apply gold plating to the contact surface, but gold plating is generally expensive, resulting in an increase in cost. Therefore, it is considered that, at the time of contact switching, the movable contact is moved so as to slide with respect to the fixed contact, whereby friction contact (wipe) is made to the contact surface to peel off the insulating coating on the contact surface.
However, with the above-described conventional structure, the switching contact (5 a) is separated downward from the normally closed contact (4 b) only at the time of contact switching, and friction contact of the contact surfaces is not considered.
The present invention has been made in view of the above-described conventional circumstances, and an object of the present invention is to provide a micro switch capable of sufficiently bringing a contact surface into frictional contact during contact switching, and peeling off an insulating coating on the contact surface. Further, the present invention is intended to improve frictional contact performance by enabling the movable contact to slide so as to deviate laterally from the fixed contact at the time of contact switching.
The microswitch according to the present invention includes: a movable member having a movable contact capable of contacting the first and second fixed contacts arranged in a spaced-apart manner and fixed to the base at one end, and supported by the support frame at the other end in a swingable manner; an actuator for performing a reversing operation on the movable member to move the movable contact from the first fixed contact side to the second fixed contact side; and a tension spring that applies a tension force to one end of the movable member. The support frames are disposed on both sides so as to sandwich the tension springs, a first end portion of one support frame of the tension springs is fixed to the base, and a second end portion of the other support frame of the tension springs is not fixed to the base.
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, whereby the contacts are switched. According to the present invention, since the first end portion of the support frame supporting the other end of the movable member is fixed to the base and the second end portion is not fixed to the base, when the movable member is reversed by the tensile force of the tension spring at the time of switching the contacts, the load acts on the support frame, and at this time, the second end portion is deformed relatively more than the first end portion. As a result, the second end portion side of the other end of the movable member deforms more than the first end portion side, and accordingly, the movable contact disposed at the one end of the movable member moves so as to deviate laterally while being in contact with the first fixed contact on the base side, and therefore the movable contact slides with respect to the fixed contact. This makes it possible to sufficiently make frictional contact with the contact surface, and to peel off the insulating coating on the contact surface.
In the present invention, the second end portion of the support frame is displaced relative to the first end portion by the tensile force of the tension spring at the time of the reversing operation of the movable member.
In the present invention, the displacement amount of the second end portion of the support frame is larger than the displacement amount of the first end portion under the tensile force of the tension spring at the time of the reversing operation of the movable member.
In the present invention, at the time of the reversing operation of the movable member, the movable contact is displaced in a direction intersecting the axial direction of the tension spring before the operation of the movable contact by the tension force of the tension spring, whereby the movable contact is slid with respect to the fixed contact.
In the present invention, the support frame includes: a first columnar member disposed on one side of the tension spring, having a first end portion, and extending in a height direction; a second cylindrical member disposed on the other side of the tension spring, having a second end portion and extending in the height direction; and a connecting member that connects the first columnar member and the second columnar member.
In the present invention, the support frame is formed in a substantially コ or substantially U shape by the first and second cylindrical members and the connecting member.
In the present invention, the dimension in the height direction of the coupling member becomes smaller as going from the side of the first columnar member toward the side of the second columnar member.
In the present invention, the connecting member is a tapered member.
In the present invention, the other end of the movable member is formed in a fork shape, one of the other ends is supported by the first columnar member of the support frame, and the other end is supported by the second columnar member of the support frame.
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.
In the present invention, at the time of the reversing operation of the movable member, the movable member rotates around the other end of the tension spring to slide the movable contact with respect to the fixed contact.
In the present invention, a restricting member for restricting movement of one end of the movable member to the side is provided on the side of one end of the movable member.
Effects of the invention
As described above, according to the present invention, when switching the contacts, the movable contact slides with respect to the fixed contact, and therefore, the contact surface can be sufficiently brought into frictional contact, and the insulating coating on the contact surface can be peeled off.
Drawings
Fig. 1 is an upper perspective view showing main components of a microswitch according to an embodiment of the present invention.
Fig. 2 is a lower perspective view of the microswitch (fig. 1).
Fig. 3 is a front perspective view showing main components of a microswitch according to an embodiment of the present invention, and corresponds to fig. 1.
Fig. 4 is a rear perspective view of the microswitch (fig. 3).
Fig. 5 is a front view of the microswitch (fig. 3).
Fig. 6 is a rear view of the microswitch (fig. 3).
Fig. 7 is a left side view of the above-described micro switch (fig. 3).
Fig. 8 is a right side view of the above-described micro switch (fig. 3).
Fig. 9 is a cross-sectional view taken along line IX-IX of fig. 5.
Fig. 10 is an X-X sectional view of fig. 5.
Fig. 11 is a plan view of the microswitch (fig. 3).
Fig. 12 is an exploded assembly view of the microswitch (fig. 3).
Fig. 13 is an overall perspective view of the universal terminal in the microswitch (fig. 3).
Fig. 14 shows a state before the actuator is operated in the microswitch (fig. 3).
Fig. 15 shows a state immediately after the actuator is operated and a state before the movable member is reversed in the microswitch (fig. 3).
Fig. 16 is a cross-sectional view taken along line XVI-XVI of fig. 14.
Fig. 17 is a cross-sectional view taken along line XVII-XVII of fig. 15.
Fig. 18 is a front view of a micro switch according to a fourth modification of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described based on the drawings.
Fig. 1 to 17 are diagrams for explaining a micro switch according to an embodiment of the present invention, fig. 1 to 8 and 11 are diagrams showing main components of the micro switch according to the present embodiment, fig. 9 and 10 are side sectional views of the micro switch, fig. 12 is an exploded assembly view of the micro switch, fig. 13 is a perspective view of a general-purpose terminal unit of the micro switch, and fig. 14 to 17 are diagrams for explaining the operational effects of the present embodiment. In the following description, the long side direction of the micro switch is referred to as the front-rear direction, the short side direction is referred to as the lateral direction or the left-right direction, and the direction perpendicular to these directions is referred to as the up-down direction or the height direction. That is, in the case of fig. 5 as an example, the left-right direction of fig. 5 is the front-back direction, the direction perpendicular to the paper surface of fig. 5 is the lateral or left-right direction, and the up-down direction of fig. 5 is the up-down direction.
As shown in fig. 1 to 8 and 12, the micro switch 1 according to the present embodiment includes: a base 2 which is an insulating base made of synthetic resin; and a universal terminal 3, a normally open fixed terminal 4, and a normally closed fixed terminal 5, which are integrally fixed to the base 2 by insert molding. These terminals extend vertically through the base 2, and the base end portions of the terminals have external connection terminals 3A, 4A, 5A extending downward of the base 2.
The tip (switching side 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 side end) of the normally closed fixed terminal 5 has a normally closed fixed contact (first fixed contact) 5b arranged above the base 2 so as to face the upper side of the normally open fixed contact 4 b. The normally open fixed contact 4b is fixed by caulking or the like to a contact mounting portion 4a disposed at a position near the base 2 above the base 2. The normally closed fixed contact 5b is fixed to a contact mounting portion 5a disposed above the base 2 at a position apart from the base 2 by caulking or the like.
The end portion of the universal terminal 3 has a substantially U-shaped (or substantially コ -shaped) support frame 30. The support frame 30 has: a first columnar member 30A extending in the up-down direction; a second columnar member 30B disposed opposite to the first columnar member 30A with a gap therebetween, and extending in the vertical direction as well; and a connecting member 30C that connects the first and second columnar members 30A, 30B in the left-right direction.
As shown in fig. 10, which is a line IX-IX section in fig. 5, that is, an X-X section in fig. 9 and 5, in the support frame 30, a first end portion 30A of a first columnar member 30A connected to one end of a connecting member 30C 1 Is embedded in the base 2 and is fixed to the base 2, thereby becoming a fixed end. In contrast, the second end 30B of the second cylindrical member 30B is connected to the other end of the connecting member 30C 1 Is not buried in the base 2 (and is therefore not fixed to the base 2, and is free, that is, free), but is disposed above the base 2. Therefore, each end 30A is laterally displaced 1 、30B 1 The connecting member 30C is disposed above the upper surface 2A of the base 2 with a gap therebetween.
Here, as shown in fig. 13, the universal terminal 3 is configured by three-dimensionally bending a terminal plate, and the support frame 30 is arranged in an orientation substantially orthogonal to the orientation of the external connection terminal 3A. As shown in fig. 13, the universal terminal 3 has a second postFirst end 30A of the shaped member 30A 1 An extension portion 30A extending downward of the connecting portion 30C 2 . As shown in fig. 9 and 10, the extension portion 30A 2 Buried in the base 2 and fixed to the base 2. In the universal terminal 3, the extension portion 30A 2 The reason for having the 3-point bending portion BP (see fig. 13) between the external connection terminal 3A is as follows. After the universal terminal 3 is punched in the developed state in which it is integrally and continuously provided with the normally open fixed terminal 4 and the normally closed fixed terminal 5, the terminals 3, 4, 5 are bent through the fixing step of the contacts 4b, 5b while maintaining the continuously provided state of the terminals 3, 4, 5, and the terminals 3, 4, 5 are cut and separated after being insert-molded in the base 2, however, in this case, if the bent portion of the universal terminal 3 is 1, the supporting frame 30 of the universal terminal 3 interferes with the normally open fixed terminal 4 in the vicinity in the developed state, and therefore, the above arrangement is performed in order to eliminate the problem.
In the example shown in fig. 9 and 10, the first end portion 30A is the height, which is the dimension in the height direction (vertical direction) of the connecting member 30C 1 The height of (2) is set to h 1 And a second end 30B 1 The height of (2) is set to h 2 At this time, the following is set:
h 1 ＞h 2 。
in the example shown in fig. 9 and 10, the height of the connecting member 30C is equal to the height of the end 30A 1 Toward end 30B 1 The height of the connecting member 30C gradually decreases, and the connecting member is tapered when viewed from the front-rear direction.
As shown in fig. 1 to 8 and 12, the microswitch 1 includes a movable member 6, and the movable member 6 has a movable contact 6a at one end and is swingable in the up-down direction about the other end side as a fulcrum. The movable contact 6a is composed of movable contacts 6a arranged on the upper side 1 And 6a arranged at the lower side 2 Is formed with upper movable contact 6a 1 A movable contact 6a provided so as to be capable of contacting the normally closed fixed contact 5b and provided on the lower side 2 Is provided so as to be capable of contacting the normally open fixed contact 4 b.
As in figure 1As shown in fig. 1 and 12, the movable member 6 is bifurcated at the other end side, has a rear end surface 60B at each end thereof, and has a pair of left and right side wall portions 6A, 6B. Cut-outs 6A are formed at the distal ends of the side wall portions 6A, 6B, respectively 1 、6B 1 . On the other hand, engaging concave portions 30A are formed on the outer side surfaces of the first and second cylindrical members 30A, 30B of the support frame 30 on the base 2 side 3 、30B 3 . The end portions of the side wall portions 6A, 6B of the movable member 6 are engaged with the engaging recesses 30A of the first and second cylindrical members 30A, 30B of the support frame 30 3 、30B 3 Accordingly, the movable member 6 is supported by each engagement recess 30A of the support frame 30 so as to be swingable in the up-down direction 3 、30B 3 . At this time, the rear end surfaces 60B of the other end side ends of the movable member 6 are in contact with the first and second cylindrical members 30A and 30B (see fig. 11).
As shown in fig. 1 to 6 and 12, the microswitch 1 is provided with an actuator 7 for reversing the movable member 6 so that the movable contact 6a of the movable member 6 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. The actuator 7 is disposed in an orientation intersecting the movable member 6 (see fig. 5 and 6).
As shown in fig. 12, the actuator 7 has a pair of support plate portions 7a, 7b extending to the left and right sides at one end. On the other hand, the base 2 is provided with a pair of left and right support bases 20A, 20B protruding upward, and engaging recesses 20A, 20B are formed in the support bases 20A, 20B, respectively. The support plate portions 7a and 7B of the actuator 7 are engaged with the engagement concave portions 20A and 20B (see fig. 5 and 6) of the support tables 20A and 20B, respectively, whereby the actuator 7 is supported by the engagement concave portions 20A and 20B so as to be swingable in the up-down direction. The actuator 7 has an operation portion 71 at the other end that is operated from the outside.
As shown in fig. 1 to 6, 11 and 12, the microswitch 1 has an extension coil spring (extension spring) 8. The tension coil spring 8 has hooks 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. 12) provided on one end side of the movable member 6, and the hook portion 8b is locked to the locking protrusion 70a (fig. 12) provided on the other end side of the actuator 7. Accordingly, a tensile force by 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. 11, one end portion of the tension coil spring 8 is disposed between the first and second cylindrical members 30A, 30B of the support frame 30. That is, the first and second cylindrical members 30A and 30B of the support frame 30 are disposed on the left and right sides so as to sandwich the tension coil spring 8. As shown in fig. 12, the actuator 7 has a pair of left and right protruding portions 7c and 7d protruding upward at a central portion in the longitudinal direction. On the other hand, as shown in fig. 13, engaging concave portions 30A are formed on the inner side surfaces of the first and second cylindrical members 30A, 30B of the support frame 30, respectively 4 、30B 4 . The protruding portions 7c, 7d of the actuator 7 are engaged with the engaging recesses 30A of the first and second cylindrical members 30A, 30B of the support frame 30 4 、30B 4 (see fig. 10), thereby restricting upward movement of the actuator 7.
Next, the operational effects of the present embodiment will be described with reference to fig. 14 to 17.
Fig. 14 shows a state before the operation of the actuator 7 in the microswitch 1, and fig. 15 shows a state immediately after the operation. Fig. 16 is a sectional view taken along line XVI-XVI in fig. 14, and fig. 17 is a sectional view taken along line XVII-XVII in fig. 15.
In the pre-operation state shown in fig. 14, the movable contact 6a of the movable member 6 1 The electrical circuit between the common terminal 3 and the normally closed fixed terminal 5 is closed by abutting against the normally closed fixed contact 5b, and a predetermined contact pressure is applied between the contacts by the urging force of the tension coil spring 8. At this time, as shown in fig. 16, the axis CL of the tension coil spring 8 0 Movable contact 6a with movable member 6 1 And the center lines of the normally closed fixed contacts 5b are substantially aligned. Namely, the movable contact 6a 1 And the normally closed fixed contact 5b are in a state in which the center lines are substantially aligned 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 engagement concave portions 20A, 20B (fig. 12) of the support base 2 side support base 20A, 20B (fig. 12) to which the support plate portions 7a, 7B (fig. 12) of the one end side of the actuator 7 are engaged, so that the operation portion 71 moves downward, as a result of which the movable member 6 is reversed, so that the movable member 6 is intended to move from the upper position on the normally closed fixed contact 5B side to the lower position on the normally open fixed contact 4B side.
In this case, immediately before the reversing operation of the movable member 6 by the actuator 7, as shown in fig. 15, the movable contact 6a of the movable member 6 1 In a state of still abutting against the normally closed fixed contact 5b. Then, the actuator 7 swings downward, and the interval between the locking protrusion 60a on the one end side of the movable member 6 to which the hook portion 8a of the tension coil spring 8 is locked and the locking protrusion 70a on the other end side of the actuator 7 to which the hook portion 8b is locked increases, so that the tension coil spring 8 is stretched, and the tension force against the one end side of the movable member 6 increases.
At this time, the pressing forces acting from the other ends of the movable member 6 are increased by the first and second columnar members 30A and 30B of the support frame 30 that are brought into contact with the rear end surfaces 60B of the two fork-shaped other ends of the movable member 6. As described above, the first end 30A of the first columnar member 30A 1 A second end 30B of the second cylindrical member 30B fixed to the base 2 1 Not fixed to the base 2, and therefore, when the pressing force acting from the other end of the movable member 6 increases, the second end portion 30B of the second columnar member 30B 1 With the first end 30A of the first columnar member 30A 1 The deformation amount is relatively large compared with the deformation amount which is relatively large. In other words, at this time, the second end 30B of the second cylindrical member 30B 1 First end 30A opposite first columnar member 30A 1 To shift with the first end 30A 1 In contrast, the displacement amount is large, and the second columnar member 30B rotates around the first columnar member 30A.
In this case, as shown in fig. 10, the first end 30A 1 Height h of (2) 1 Greater than the second end 30B 1 Height h of (2) 2 Preferably, the connecting member 30C is located at a height from the first end 30A 1 Toward the second end 30B 1 Gradually decreasing, thereby forming the connecting member 30C into a tapered shape, and thus, the second end 30B 1 Is further greater than the first end 30A 1 Is a displacement amount of the lens.
At this time, the first end 30A of the first columnar member 30A 1 The second end 30B of the second cylindrical member 30B is a fixed end 1 Is free, and therefore, when the pressing force acting on each columnar member 30A, 30B from the other end of the movable member 6 increases, the pressing force is applied to the second end 30B of the second columnar member 30B 1 Is greater than the first end 30A of the first columnar member 30A 1 Is a displacement amount of the lens.
Accordingly, as shown in fig. 17, one end side of the movable member 6 is displaced (i.e., rotated sideways) so as to be deviated sideways around the other end side by the tensile force of the tension coil spring 8. At this time, the hook 8a at one end of the tension coil spring 8 is locked to the locking projection 60a at one end of the movable member 6, and therefore, the one end of the tension coil spring 8 is also displaced laterally by the displacement of the movable member 6 laterally. As a result, as shown by the one-dot chain line and the two-dot chain line in fig. 17, the axis CL of the tension coil spring 8 1 From axis CL 0 Is displaced laterally about the other end side of the tension coil spring 8, so as to be aligned with the axis CL 0 Shifting in the direction of the crossover. With this, the movable contact 6a on one end side of the movable member 6 1 (Movable contact 6a 2 The same is true) in a state of maintaining contact with the fixed contact 5b, in a state of being in contact with the axis CL of the tension coil spring 8 0 Shifting in the direction of the crossover. At this time, as shown in FIG. 17, the movable contact 6a 1 (Movable contact 6a 2 The same applies to the normally closed fixed contact 5 b), and the normally closed fixed contact 5b is slid by being displaced laterally (i.e., rotated laterally).
Accordingly, the contact surface can be sufficiently brought into frictional contact, and the insulating coating on the contact surface can be peeled off.
When the actuator 7 is further operated beyond the state of fig. 15, the movable member 6 is reversed, 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, whereby the contacts are switched.
[ first modification ]
In the above embodiment, as shown in fig. 10, the first end portion 30A of the first columnar member 30A of the support frame 30 is shown 1 Although the present invention is not limited to this, the base 2 is partially embedded in the base 2 and fixed to the base 2. The portion buried in the base 2 and fixed to the base 2 may be the first end portion 30A 1 All of (3).
[ second modification ]
In the above embodiment, the extension portion 30A of the universal terminal 3 is shown 2 From the first end 30A of the first columnar member 30A 1 A first end 30A disposed below the connecting portion 30C 1 Examples of the extension lines (see fig. 9, 10, and 13), but the application of the present invention is not limited thereto. Extension portion 30A 2 May also be disposed opposite to the first end 30A 1 And is biased to the lateral position. In this case, the extension portion 30A 2 Preferably disposed between the center line of the support frame 30 and the center line of the first columnar member 30A, and at this time, the extending portion 30A 2 Is provided to extend downward from the connecting member 30C between the center line of the support frame 30 and the center line of the first columnar member 30A. At this time, the first end 30A of the first columnar member 30A 1 Embedded in the base 2, and the extension portion 30A is opposed to this 2 Whether embedded in the base 2 or not.
[ third modification ]
In the above embodiment, the extension portion 30A is shown provided below the support frame 30 and between the external connection terminal 3A 2 However, the extension portion 30A 2 Or may be omitted. In this case, the common terminal 3 is composed of 2 members, i.e., the supporting frame 30 and the external connection terminal 3A, which are arranged separately, but are interposed by, for example, a jumper wireAnd (5) performing electric connection.
[ fourth modification ]
Fig. 18 shows a micro switch according to a fourth modification of the present invention, and in fig. 18, the same reference numerals as those in the above-described embodiment denote the same or corresponding parts.
In the microswitch 1 shown in fig. 18, a protruding portion 9 protruding inward (left side in fig. 18) is provided at an upper portion of an extension portion 5c provided to extend upward from the base 2 so as to support the contact mounting portion 5a of the normally closed fixed contact 5b from below. The protruding portion 9 is disposed at a position laterally (on the back side of the paper surface of fig. 18) of one end of the movable member 6 with a predetermined interval therebetween, and is disposed between the protruding portion and one end of the movable member 6, and overlaps the one end of the movable member 6 when viewed from the front view direction. The protruding portion 9 functions as a restricting portion for restricting movement of one end of the movable member 6 to the lateral direction. In the above embodiment, although the similar protruding portion is not illustrated, it is not disposed laterally of one end of the movable member 6, and is not overlapped with one end of the movable member 6 when viewed from the front view direction.
The reason why the protruding portion 9 as the restricting portion is provided is as follows.
The free end side one end of the movable member 6 may be excessively moved sideways due to vibration or impact during transportation of the microswitch 1 or impact when the microswitch 1 is lowered during installation. When the movable contact 6a on the one end side of the movable member 6 is returned 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 intended to be displaced in the direction opposite to the displacement direction at the time of the reversing operation with respect to the normally closed fixed contact 5b, and therefore, it is considered that the amount of movement in which the one end side of the movable member 6 is moved laterally becomes large due to inertia at this time. This is because: in this case, by bringing one end of the movable member 6 into contact with the protruding portion 9, the amount of movement of the one end of the movable member 6 to the lateral direction can be prevented from becoming excessively large, and the other end of the movable member 6 can be prevented from being separated from the first and second cylindrical members 30A and 30B of the support frame 30.
[ other variations ]
The above-described embodiments and modifications are to be considered in all respects as mere examples of the present invention, and are not to be construed as limiting. Various modifications and other embodiments which incorporate the principles of the present invention may be made by those skilled in the art to which the present invention pertains without departing from the spirit and essential characteristics of the invention in view of the foregoing teachings, even though not explicitly stated in the present specification.
Industrial applicability
The present invention is useful for a micro switch used as a detection switch, an operation switch, or the like.
Description of the reference numerals
1: micro-switch
2: base seat
4b: normally open fixed contact (second fixed contact)
5b: normally closed fixed contact (first fixed contact)
6: movable part
6a 1 、6a 2 6a: movable contact
7: actuator with a spring
8: stretching spiral spring (stretching spring)
9: limiting component
30: supporting frame
30A: first columnar member
30A 1 : first end portion
30B: second cylindrical member
30B 1 : second end portion
30C: connecting part (limiting component)
CL 0 、CL 1 : an axis line
Claims (12)
1. A microswitch is characterized by comprising:
a movable member having a movable contact capable of contacting the first and second fixed contacts arranged in a spaced-apart manner and fixed to the base at one end, and supported by the support frame at the other end in a swingable manner;
an actuator for performing a reversing operation on the movable member to move the movable contact from the first fixed contact side to the second fixed contact side; and
a tension spring that applies a tension force to the one end of the movable member,
the support frames are disposed on both sides so as to sandwich the tension springs, a first end portion of the support frame on one side of the tension springs is fixed to the base, and a second end portion of the support frame on the other side of the tension springs is not fixed to the base.
2. The microswitch as in claim 1 wherein,
during the reversing operation of the movable member, the second end portion of the support frame is displaced with respect to the first end portion by the tensile force of the tension spring.
3. The microswitch as in claim 1 wherein,
during the reversing operation of the movable member, the displacement amount of the second end portion of the support frame is larger than the displacement amount of the first end portion under the urging force of the urging spring.
4. The microswitch as in claim 1 wherein,
at the time of the reversing operation of the movable member, the movable contact is displaced in a direction intersecting the axial direction of the tension spring before the operation of the movable contact by the tension force of the tension spring, thereby causing the movable contact to slide with respect to the fixed contact.
5. The microswitch as in claim 1 wherein,
the support frame includes: a first columnar member disposed on the one side of the tension spring, having the first end portion, and extending in a height direction; a second cylindrical member which is disposed on the other side of the extension spring, has the second end portion, and extends in a height direction; and a connecting member that connects the first columnar member and the second columnar member.
6. The micro-switch as claimed in claim 5, wherein,
the support frame is formed in a substantially コ or substantially U shape by the first and second cylindrical members and the connecting member.
7. The micro-switch as claimed in claim 5, wherein,
the dimension of the coupling member in the height direction becomes smaller as going from the side of the first columnar member toward the side of the second columnar member.
8. The micro-switch as claimed in claim 7, wherein,
the connecting member is a tapered member.
9. The micro-switch as claimed in claim 5, wherein,
the movable member is formed in a fork shape at the other end, one of the other ends is supported by the first columnar member of the support frame, and the other end is supported by the second columnar member of the support frame.
10. The microswitch as in claim 1 wherein,
one end of the extension spring is locked at the one end of the movable member, and the other end is locked at the actuator.
11. The microswitch as in claim 10 wherein,
upon the reversing operation of the movable member, the movable member rotates around the other end of the tension spring so that the movable contact slides with respect to the fixed contact.
12. The microswitch as in claim 1 wherein,
a restricting member for restricting the lateral movement of the one end of the movable member is provided on the lateral side of the one end of the movable member.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-189183 | 2020-11-13 | ||
| JP2020189183A JP7538004B2 (en) | 2020-11-13 | 2020-11-13 | Microswitch |
| PCT/JP2021/041526 WO2022102707A1 (en) | 2020-11-13 | 2021-11-11 | Microswitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116368591A true CN116368591A (en) | 2023-06-30 |
Family
ID=81601259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180069599.2A Pending CN116368591A (en) | 2020-11-13 | 2021-11-11 | Micro-switch |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4246545A4 (en) |
| JP (1) | JP7538004B2 (en) |
| CN (1) | CN116368591A (en) |
| TW (1) | TWI814129B (en) |
| WO (1) | WO2022102707A1 (en) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63129928U (en) | 1987-02-18 | 1988-08-25 | ||
| TW515561U (en) * | 2001-12-27 | 2002-12-21 | Xiang Min Co Ltd | Improved micro-switch structure |
| JP4676405B2 (en) | 2006-09-06 | 2011-04-27 | 富士電機機器制御株式会社 | Selector switch |
| JP2008235218A (en) | 2007-03-23 | 2008-10-02 | Fuji Electric Fa Components & Systems Co Ltd | Selector switch |
| WO2010032814A1 (en) | 2008-09-22 | 2010-03-25 | アルプス電気株式会社 | Switching device and method for assembling a snap action mechanism |
| CN102262965B (en) * | 2010-05-31 | 2013-09-25 | 维熹科技股份有限公司 | Micro Switch |
| DE102014006033A1 (en) | 2014-02-15 | 2015-08-20 | Johnson Electric Germany GmbH & Co. KG | An electrical microswitch comprising at least one electrical contact and method of manufacturing an electrical microswitch |
| CN204480932U (en) * | 2015-04-24 | 2015-07-15 | 惠州市弘宝电器有限公司 | A kind of universal sensitive switch |
| CN206505856U (en) * | 2017-03-10 | 2017-09-19 | 乐清市兰鸟电子有限公司 | A kind of microswitch |
| CN106992085B (en) * | 2017-06-05 | 2020-04-03 | 漳州聚安美电气科技有限公司 | Micro-motion limit general switch |
| CN106992086B (en) * | 2017-06-05 | 2019-10-22 | 漳州聚安美电气科技有限公司 | A kind of rotary type micro limit switch |
| CN209804511U (en) * | 2019-06-18 | 2019-12-17 | 浙江佳龙电子有限公司 | Extension spring type microswitch |
| JP7565759B2 (en) * | 2020-11-13 | 2024-10-11 | Idec株式会社 | Microswitch |
-
2020
- 2020-11-13 JP JP2020189183A patent/JP7538004B2/en active Active
-
2021
- 2021-11-09 TW TW110141690A patent/TWI814129B/en active
- 2021-11-11 CN CN202180069599.2A patent/CN116368591A/en active Pending
- 2021-11-11 EP EP21891952.0A patent/EP4246545A4/en active Pending
- 2021-11-11 WO PCT/JP2021/041526 patent/WO2022102707A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| EP4246545A1 (en) | 2023-09-20 |
| WO2022102707A1 (en) | 2022-05-19 |
| EP4246545A4 (en) | 2024-10-09 |
| TW202221744A (en) | 2022-06-01 |
| JP2022078484A (en) | 2022-05-25 |
| JP7538004B2 (en) | 2024-08-21 |
| TWI814129B (en) | 2023-09-01 |
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