CN109891523B - Switching device for variable resistor - Google Patents
Switching device for variable resistor Download PDFInfo
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- CN109891523B CN109891523B CN201680090399.4A CN201680090399A CN109891523B CN 109891523 B CN109891523 B CN 109891523B CN 201680090399 A CN201680090399 A CN 201680090399A CN 109891523 B CN109891523 B CN 109891523B
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- 239000000758 substrate Substances 0.000 claims abstract description 90
- 230000001105 regulatory effect Effects 0.000 claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 abstract 1
- 230000007704 transition Effects 0.000 description 18
- 230000005540 biological transmission Effects 0.000 description 9
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
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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
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- Microelectronics & Electronic Packaging (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Adjustable Resistors (AREA)
Abstract
The invention ensures the durability of the rotating component and limits the displacement of the spring component to the direction close to the substrate. The method comprises the following steps: a substrate (100 a); a pair of switch terminals (120c, 120d) supported by the substrate (100 a); a cam (140a) rotatably provided on the base plate (100 a); a rotating member (130a) which is arranged on the substrate (100a) and switches the connection state between the pair of switch terminals (120c, 120d) according to the rotation of the cam (140 a); a spring member (150a) having one end locked to the rotating member (130a) and the other end locked to the cam (140a), and rotating the rotating member (130a) in accordance with the rotation of the cam (140 a); and a regulating member (109) that is provided on the substrate (100a) and that regulates displacement of the spring member (150a) in a direction approaching the substrate (100 a).
Description
Technical Field
The present invention relates to a switching device for a variable resistor.
Background
Patent document 1 discloses a variable resistor switching device 10 as shown in fig. 1. The variable resistor switching device 10 is a device for switching on/off of a power supply of a variable resistor (not shown) used for adjusting a sound volume of an acoustic apparatus mounted on an automobile. Specifically, the variable resistor switching device 10 shown in fig. 1 includes: a rotating shaft (not shown) that rotates together with an operation shaft (not shown) of the variable resistor; a substrate 100; a pair of switch terminals 120a, 120 b; a rotating member 130; a cam 140; and a spring member 150.
The rotating member 130 and the cam 140 are rotatably supported by the base plate 100. By rotating the rotating member 130, a first state (power off state shown in fig. 1) in which the pair of switch terminals 120a and 120b are not conductive and a second state (not shown) in which the pair of switch terminals 120a and 120b are conductive with each other via the rotating member 130 can be obtained. One end of the spring member 150 is locked to the rotating member 130, and the other end is locked to the cam 140. Such a spring member 150 rotates the rotation member 130 according to the rotation of the cam 140.
In the case of the variable resistor switching device 10 described in patent document 1 having the above-described configuration, when the cam 140 rotates clockwise in fig. 1 in accordance with the rotation of the rotation shaft from the state shown in fig. 1, the spring member 150 rotates the rotary member 130 counterclockwise in fig. 1 in accordance with the rotation of the cam 140. The movable contact pieces 131a and 131b of the rotating member 130 contact the pair of switch terminals 120a and 120 b. As a result, the pair of switch terminals 120a and 120b are turned on via the rotating member 130 (i.e., the power source is turned on). When the cam 140 rotates counterclockwise in fig. 1 in accordance with the rotation of the rotary shaft from the power-on state of the switching device 10, the spring member 150 rotates the rotary member 130 clockwise in fig. 1 in accordance with the rotation of the cam 140, and the switching device 10 is in the power-off state.
Documents of the prior art
Patent document
Patent document 1: japanese Kokai publication Sho-61-144607
Disclosure of Invention
Problems to be solved by the invention
However, in the case of the invention described in patent document 1, when the power switching operation as described above is repeated, for example, in the state shown in fig. 1, a portion of the spring member 150 that is not supported by another member (specifically, a portion shown by the cross α in fig. 1) may be displaced in a direction approaching the substrate, and the one end portion (the upper end portion in fig. 1) of the spring member 150 may be easily disengaged from the pivot member 130. In the case of the structure described in patent document 1, the movable contact piece 131a of the pivot member 130 can support the longitudinal intermediate portion of the spring member 150 from the side of the board 100. However, the durability of the rotating member 130 may be reduced by repeated wear of the movable contact piece 131a and the spring member 150.
The invention aims to realize a structure that a spring component is not easy to displace in a direction close to a substrate while ensuring the durability of a rotating component.
Means for solving the problems
The switch device for the variable resistor of the invention comprises: a substrate; a pair of switch terminals supported by the substrate; a cam rotatably disposed on the base plate; a rotating member that is disposed on the substrate and switches a connection state between the pair of switch terminals according to rotation of the cam; a spring member having one end portion thereof locked to the rotary member and the other end portion thereof locked to the cam, the spring member rotating the rotary member in accordance with the rotation of the cam; and a restricting member that is provided on the substrate and restricts displacement of the spring member in a direction approaching the substrate.
Effects of the invention
According to the present invention, the displacement of the spring member in the direction approaching the substrate can be restricted while ensuring the durability of the pivot member.
Drawings
Fig. 1 is a plan view for explaining the structure of a conventional variable resistor switching device.
Fig. 2 is a perspective view for explaining an outline of a variable resistor with a switch incorporating the switching device for a variable resistor according to the present invention.
Fig. 3A is a plan view showing a power supply off state of the variable resistor switching device according to the embodiment of the present invention, with the case element omitted.
Fig. 3B is a plan view showing a power-on state of the variable resistor switching device according to the embodiment with the case element omitted.
Fig. 4 is an exploded perspective view of a variable resistor switching device according to an example of the embodiment.
Fig. 5 is a plan view of a substrate and a pair of switch terminals of the variable resistor switching device according to the embodiment.
Fig. 6 is a plan view of a rotary member of the variable resistor switching device according to the embodiment.
Fig. 7 is a plan view of a cam of the variable resistor switching device according to the embodiment.
Fig. 8 is a schematic sectional view corresponding to the section a-a in fig. 3B.
Detailed Description
An example of an embodiment of the variable resistor switching device according to the present invention will be described in detail with reference to fig. 2 to 8.
[1. variable resistor with switch ]
First, an outline of the structure of a variable resistor with a switch incorporating the switching device for a variable resistor according to the present invention will be described with reference to fig. 2. Fig. 2 is a perspective view of a variable resistor with a switch incorporating the switching device for a variable resistor according to the present invention.
The variable resistor with switch 1 shown in fig. 2 includes an operation shaft 20, a variable resistor 30, and a switch device 10 a.
The operation shaft 20 is an operation shaft for performing, for example, an operation of changing the magnitude of the resistance of the variable resistor 30 and an operation of switching on/off of the power supply of the switch device 10a (hereinafter, simply referred to as "power supply switching operation") by rotating it by a user.
The variable resistor 30 changes the magnitude of the resistance between the resistor terminals 300a and 300b according to the rotation of the operation shaft 20. The configuration of the variable resistor 30 is substantially the same as that of the conventional variable resistor described in patent document 1, for example, and therefore, a detailed description thereof is omitted.
The switching device 10a corresponds to a variable resistor switching device according to the present invention, and is provided adjacent to the variable resistor 30. The switching device 10a switches between a power-on state in which the switching terminals 120c and 120d are in conduction with each other and a power-off state in which the switching terminals 120c and 120d are not in conduction with each other, in accordance with the rotation of the operating shaft 20. The specific configuration of the switch device 10a will be described later.
[2 ] Overall Structure of switchgear according to example of embodiment ]
Next, an outline of the overall configuration of the switching device 10a will be described with reference to fig. 3A to 4. The specific configuration of each part constituting the switchgear 10a will be described after the outline of the overall configuration of the switchgear 10a is described. Fig. 3A shows a power supply off state of the switching device 10a with the case member 170 omitted. Fig. 3B shows a power-on state of the switching device 10a with the case member 170 omitted. Fig. 4 shows an exploded perspective view of the switch device 10 a.
The switch device 10a includes a substrate 100a, a case member 170, a pair of switch terminals 120c and 120d, a rotation shaft 160, a rotation member 130a, a cam 140a, a spring member 150a, and a regulating member 109.
The substrate 100a is combined with the case member 170, thereby forming a switch case having an inner space of a substantially rectangular parallelepiped shape. The pair of switch terminals 120c and 120d are held on the substrate 100a in a state in which a part of each of the terminals extends to the outside space of the switch case. The rotary shaft 160, the rotary member 130a, the cam 140a, and the spring member 150a are supported on one side surface of the substrate 100a defining the internal space of the switch case.
The rotation shaft 160 transmits the rotation of the operation shaft 20 (see fig. 2) to the cam 140 a. The spring member 150a is bridged between the cam 140a and the rotating member 130a, and rotates the rotating member 130a according to the rotation of the cam 140 a. The rotation of the rotating member 130a according to the rotation of the cam 140a can bring about a first state (i.e., the state shown in fig. 3A) in which the pair of switch terminals 120c and 120d are not in conduction with each other, and a second state (i.e., the state shown in fig. 3B) in which the pair of switch terminals 120c and 120d are in conduction with each other via the rotating member 130 a.
In the case of the switching device 10a as described above, when the operation shaft 20 is rotated in a predetermined direction from the power-off state shown in fig. 3A, the rotation is transmitted to the cam 140a via the rotation shaft 160. Then, the spring member 150a is elastically deformed according to the rotation of the cam 140a, and the rotating member 130a is rotated. As a result, the pair of switch terminals 120c and 120d are turned on via the rotating member 130 a.
On the other hand, when the operation shaft 20 is rotated in the direction opposite to the predetermined direction from the power-on state, the rotation is transmitted to the cam 140a via the rotation shaft 160. Then, the spring member 150a rotates the rotation member 130a according to the rotation of the cam 140 a. As a result, the rotating member 130a is separated from at least one of the pair of switch terminals 120c and 120d, and the pair of switch terminals 120c and 120d are in a power-off state in which they are not in conduction with each other.
In addition, the regulating member 109 regulates displacement of the spring member 150a in a direction to approach the substrate 100a upon a power switching operation of the switching device 10 a.
[2.1 Structure of each part of the switchgear ]
Next, referring to fig. 3A to 8, specific configurations of the substrate 100a, the case member 170, the pair of switch terminals 120c and 120d, the rotary shaft 160, the rotary member 130a, the cam 140a, the spring member 150a, and the regulating member 109 constituting the switch device 10a will be described.
In the following description of the present example, for convenience of explanation, the orthogonal coordinate system (W, L, T) shown in fig. 3A, 3B, and 5 is used for the directions of the respective portions. In the orthogonal coordinate system (W, L, T), the "positive direction" of the W axis is the right side of each drawing, the "positive direction" of the L axis is the upper side of each drawing, and the "positive direction" of the T axis is the front side of each drawing.
The W axis direction is also referred to as a "width direction" of the switch device 10a and the substrate 100a in an assembled state. The L-axis direction is also referred to as the "longitudinal direction" of the switch device 10a and the substrate 100a in the assembled state. The T-axis direction is also referred to as a "height direction" of the switch device 10a and the substrate 100a in the assembled state.
One of the "width direction", "length direction", and "height direction" corresponds to the "positive direction" of the W axis, L axis, and T axis. On the other hand, "the other one" of the "width direction", "length direction", and "height direction" corresponds to the "negative direction" of the W axis, L axis, and T axis.
[2.1.1 substrates ]
In the case of the present example, as shown in fig. 5, the substrate 100a has a substrate main body 101 of a rectangular plate shape and a side wall member 102 provided on the other end portion in the longitudinal direction of the substrate main body 101. Such a substrate body 101 constitutes a lower wall of a switch case in a rectangular parallelepiped shape, and the side wall member 102 constitutes 1 side wall of 4 side walls of the switch case.
The substrate main body 101 has a through hole 103, a substrate-side shaft support portion 105, a relief recess 106, a guide recess 107, a tab arrangement portion 108, and a regulating member 109.
The through hole 103 is formed in a substantially central portion of the substrate main body 101. A rotating shaft 160 is inserted into the through hole 103.
The board-side shaft support portion 105 supports a pivot 143 serving as a rotation center of the cam 140a and the turning member 130a, which will be described later. Such a board-side shaft support portion 105 is a through hole formed in one end portion in the width direction and the other end portion in the longitudinal direction (i.e., the lower right portion in fig. 5) of the board main body 101. In addition, the pivot 143 is provided in parallel with the rotation shaft 160.
The escape recess 106 prevents interference between the tip end of the first locking portion 152 of the spring member 150a and the substrate main body 101. Such a relief recess 106 is an arc-shaped recess formed in a portion (i.e., an upper left portion in fig. 5) of one side surface of the substrate main body 101, which is opposite to the substrate-side shaft support portion 105 via the through hole 103.
The guide recess 107 guides the rotation of the pivotal member 130a by engagement with the movable-side guide piece 135 of the pivotal member 130 a. Such a guide recess 107 is an arc-shaped recess formed in a portion adjacent to the other side (lower side in fig. 5) in the longitudinal direction of the escape recess 106 in one side surface of the substrate main body 101.
The contact piece arrangement portion 108 arranges the fixed contact piece 122 of one switch terminal 120c of the pair of switch terminals 120c, 120 d. The tab arrangement portion 108 is defined by a notch 111 formed in one end surface of the substrate main body 101 in the width direction.
[2.1.2 housing Member ]
The housing member 170 includes: a rectangular plate-shaped upper wall member 171 constituting an upper wall of the switch case; and 3 side wall members 172 of a rectangular plate shape constituting 3 side walls out of 4 side walls of the switch case. The case member 170 as described above is assembled to the substrate 100a to constitute a switch case.
[ 2.1.3A pair of terminals for switch ]
The pair of switch terminals 120c and 120d are metal wires. The pair of switch terminals 120c and 120d are embedded in the substrate 100a with their respective distal ends 121a and 121b exposed to the outside. The pair of switch terminals 120c and 120d are embedded in the substrate 100a by injection molding (insert molding).
Specifically, the distal end portion 121a of the one switch terminal 120c protrudes from the other end surface (the lower end surface in fig. 3A) of the substrate main body 101 in the longitudinal direction to the outside of the substrate main body 101. One switch terminal 120c has a rectangular plate-shaped fixed-side contact piece 122. Such a fixed-side contact piece 122 is exposed to the outside from the bottom of the notch 111 of the substrate main body 101, and is disposed on the contact piece disposition portion 108. The distal end portion 121a of one of the switch terminals 120c and the fixed-side contact piece 122 are electrically connected to each other through a continuous portion (not shown) embedded in the substrate main body 101.
The distal end 121b of the other switch terminal 120d protrudes outward from the other end surface in the longitudinal direction of the substrate main body 101. The base end of the other switch terminal 120c is electrically connected to the pivot member 130a via a pivot 143 supported by the board-side shaft support portion 105 of the board main body 101. The number of the switch terminals is not limited to the present example.
[2.1.4 rotation axis ]
Referring to fig. 3A to 4, the rotation shaft 160 will be described.
The rotation shaft 160 is fixed coaxially with the operation shaft 20 (see fig. 2) at the other end in the axial direction (in other words, the height direction) of the operation shaft 20. Such a rotation shaft 160 rotates together with the operation shaft 20. The rotation shaft 160 may be constituted by a shaft-like member provided integrally with or separately from the operation shaft 20. The rotation shaft 160 rotates a cam 140a described later in accordance with the rotation of the operation shaft 20.
In this example, the rotary shaft 160 is a hollow member made of synthetic resin, specifically. The cross-sectional shape of the inner circumferential surface of the rotary shaft 160 (in other words, the cross-sectional shape orthogonal to the axial direction of the rotary shaft 160) is rectangular or elliptical. The rotary shaft 160 has a rotation support portion 161 and a transmission engagement portion 162.
The rotation support portion 161 is engaged with the substrate 100a, thereby rotatably supporting the rotation shaft 160 with respect to the substrate 100 a.
The transmission engagement portion 162 is engaged with a cam 140a described later, thereby transmitting the rotation of the rotary shaft 160 to the cam 140 a. Such transmission engagement portion 162 is a convex portion formed on the outer peripheral surface of rotation shaft 160.
The rotation shaft 160 is externally fitted to an end of the operation shaft 20. In this state, the rotation support portion 161 of the rotation shaft 160 is inserted into the through hole 103 of the substrate main body 101. Thus, the rotation shaft 160 is rotatably supported by the substrate 100 a.
[2.1.5 rotating parts ]
The rotating member 130a will be described with reference to fig. 3A to 4 and 6.
The rotating member 130a is rotatably supported by a pivot 143, and the pivot 143 is supported by the base plate 100 a. The pivot member 130a and the other switch terminal 120d are always in conduction via the pivot 143. The rotating member 130a can be brought into contact with one of the switch terminals 120c (in other words, into an on state) and out of contact with the other switch terminal (in other words, into an off state) according to its own rotation angle.
Specifically, the pivot member 130a is a metal plate-like member, and includes a shaft insertion hole 132, a movable-side shaft support portion 133, a movable-side locking portion 134, a movable contact piece 131c, and a movable-side guide piece 135.
The shaft insertion hole 132 is for inserting the rotary shaft 160 therethrough. Such a shaft insertion hole 132 is a through hole formed in an annular portion 136 (see fig. 6) of the rotating member 130 a.
The movable-side shaft support portion 133 is a through hole formed in a first enlarged portion 137 (see fig. 6) extending radially outward from the annular portion 136 (specifically, radially outward from the annular portion 136). A pivot shaft 143 is inserted through the movable-side shaft support 133. In this way, the rotating member 130a is supported on the substrate 100a so as to be rotatable about the pivot 143.
The other end of the spring member 150a is locked to the movable-side locking portion 134. Specifically, in this example, the movable-side locking portion 134 is a through hole formed in a second expanded portion 138 (see fig. 6) extending radially outward from the annular portion 136 (specifically, radially outward from the annular portion 136).
The movable contact piece 131c can be brought into contact with (in other words, conductive) the fixed contact piece 122 of one switch terminal 120c and out of contact with (in other words, nonconductive) the fixed contact piece according to the rotation of the rotating member 130 a. Such a movable contact piece 131c extends outward in the radial direction of the annular member 136 from one end portion (the right end portion in fig. 3A, 3B, and 6) in the width direction of the outer peripheral edge of the annular portion 136.
The movable-side guide piece 135 guides the rotation of the rotating member 130a by engaging with the guide recess 107 of the substrate main body 101. Such movable-side guide piece 135 extends in a state of being bent from the outer peripheral edge of annular portion 136 toward the substrate main body 101.
The pivot member 130a as described above is disposed on one side surface of the substrate main body 101 in a state where the pivot shaft 143 supported by the substrate-side shaft support portion 105 of the substrate main body 101 is inserted into the movable-side shaft support portion 133 and the movable-side guide piece 135 is engaged with the guide recess 107 of the substrate main body 101.
In this state, the rotation shaft 160 is inserted into the through hole 132 of the rotation member 130 a. The pivoting member 130a can pivot about the pivot 143 within a range in which the movable-side guide piece 135 is displaceable inside the guide recess 107.
The rotating member 130a can be in a first state (the state shown in fig. 3A) separated from at least one of the pair of switch terminals 120c and 120d (the other switch terminal 120d in the present example) and in a second state (the state shown in fig. 3B) in contact with both of the pair of switch terminals 120c and 120d, depending on the rotation angle thereof.
In the second state, the pair of switch terminals 120c and 120d are electrically connected to each other via the rotating member 130 a. The first state corresponds to a power-off state of the switching device 10a, and the second state corresponds to a power-on state of the switching device 10 a.
[2.1.6 cam ]
The cam 140a will be described with reference to fig. 3A to 4 and 7.
The cam 140a is supported by a pivot 143 in a rotatable state about the pivot 143, and the pivot 143 is supported by the substrate 100 a. The cam 140a is disposed at a position farther from the substrate main body 101 than the rotating member 130 a. By rotating the cam 140a about the pivot 143 in accordance with the rotation of the rotary shaft 160, a first state (state shown in fig. 3A) corresponding to the power-off state of the switch device 10a and a second state (state shown in fig. 3B) corresponding to the power-on state of the switch device 10a can be obtained.
Specifically, the cam 140a is made of synthetic resin as a whole, and includes a cam main body 141 and a cam-side shaft support portion 142 provided on a base end portion of the cam main body 141.
The cam body 141 has a cam side engaging portion 144 and a cam side locking portion 145.
The cam side engaging portion 144 engages with the transmission engaging portion 162 of the rotating shaft 160, and transmits the rotation of the rotating shaft 160 to the cam main body 141. The cam-side engaging portion 144 is a recess formed at the tip end of one side surface (front surface in fig. 3A, 3B, and 7) of the cam body 141.
The cam-side locking portion 145 locks the other end portion of the spring member 150 a. Such a cam-side locking portion 145 is a through hole formed in a state where the cam main body 141 is penetrated through the bottom of the cam-side engaging portion 144.
The cam-side shaft support portion 142 supports the cam 140a in a state of being rotatable about the pivot 143 with respect to the pivot 143. The cam-side shaft support portion 142 is a partially cylindrical member having a C-shaped cross section. Such a cam-side shaft support portion 142 is provided integrally with the base end portion of the cam main body 141.
The cam 140a as described above is supported in a state in which a portion of the pivot 143 on a side farther from the board main body 101 than a portion supporting the rotating member 130a is inserted into the cam-side shaft supporting portion 142. In this state, the cam side engaging portion 144 of the cam body 141 can engage with the transmission engaging portion 162 of the rotary shaft 160. The rotation of the rotating shaft 160 is transmitted to the cam body 141 (i.e., the cam 140a) via the transmission engaging portion 162 and the engaging portion of the cam side engaging portion 144.
[2.1.7 spring Member ]
The spring member 150a will be described with reference to fig. 3A to 4.
The spring member 150a is made of a substantially arc-shaped metal wire having elasticity. The spring member 150a rotates the rotating member 130a in a direction opposite to the rotation direction of the cam 140a according to the rotation of the cam 140 a.
Specifically, the spring member 150a includes a spring body 151, a first locking portion 152, and a second locking portion 153.
The first locking portion 152 extends from one end of the spring main body 151 in a direction approaching the substrate main body 101. On the other hand, the second locking portion 153 extends from the other end portion of the spring main body 151 in a direction away from the substrate main body 101.
The spring member 150a as described above is assembled in a state where the first locking portion 152 is inserted into the movable side locking portion 134 of the rotating member 130a from the side away from the substrate body 101, and the second locking portion 153 is inserted into the cam side locking portion 145 of the cam 140a from the side close to the substrate body 101. That is, the spring main body 151 of the spring member 150a is disposed between the rotating member 130a and the cam 140a (specifically, the cam main body 141) in the height direction.
In this state, the spring member 150a undergoes state transition while being elastically deformed between a first state (a state shown in fig. 3A) in which the amount of deflection of the spring member 150a is small and a second state (a state shown in fig. 3B) in which the amount of deflection of the spring member 150a is large in accordance with the rotation of the cam 140 a. The first state corresponds to a power-off state of the switching device 10a, and the second state corresponds to a power-on state of the switching device 10 a.
[3 regulating Member ]
The regulating member 109 regulates the displacement of the spring member 150a so that the longitudinal intermediate portion of the spring member 150a (hereinafter, simply referred to as the intermediate portion of the spring member 150a) is not displaced to a position closer to the substrate 100a than the rotating member 130 a.
Hereinafter, a specific structure of the regulating member 109 will be described with reference to fig. 3A, 3B, and 8. As described above, the regulating member 109 regulates the displacement of the portion of the spring member 150a that is not supported by other members (specifically, members other than the substrate 101) to a position closer to the substrate 100a than the one side surface of the rotating member 130 a.
In the case of this example, the regulating member 109 is provided on one side surface of the board main body 101 so as to overlap with the intermediate portion of the spring member 150a in the height direction in the power-on state of the switch device 10a shown in fig. 3B.
Specifically, the regulating member 109 is provided on a portion of one side surface of the substrate main body 101 that overlaps in the height direction with a portion of the half of the middle portion of the spring member 150a on the cam 140a side in the power on state.
In addition, in the power-on state, a gap in the height direction exists between both side portions of the portion of the spring member 150a that overlaps the regulating member 109 in the height direction and one side surface of the substrate main body 101. In other words, in the power-on state, there are portions of the spring member 150a that are not supported by other members in both longitudinal direction side portions of the portion overlapping the regulating member 109 in the height direction.
In the case of this example, the regulating member 109 does not overlap the spring member 150a in the height direction in the power-off state (the state shown in fig. 3A) of the switching device 10 a. On the other hand, in the power-on state, the regulating member 109 overlaps the spring member 150a in the height direction.
That is, the regulating member 109 starts to overlap the spring member 150a in the height direction in the middle of the state transition of the switching device 10a from the power-off state to the power-on state. In the present embodiment, the regulating member 109 is provided integrally with the substrate main body 101. However, the regulating member 109 may be provided separately from the substrate main body 101. As shown in fig. 3A, the regulating member 109 is preferably provided on at least one side surface of the substrate main body 101 so as to overlap with the longitudinal center portion of the spring member 150a in the height direction.
In the front end surface (the front surface in fig. 3A, 3B, 5, and the upper surface in fig. 8) of the regulating member 109, a support surface 110 is formed at least in a portion overlapping the spring member 150a in the height direction at the time of the state transition. The support surface 110 has a shape such that the intermediate portion of the spring member 150a is displaced in a direction away from the substrate main body 101 (in other words, in one of the height directions, and upward in fig. 8) as the state transition progresses.
Specifically, the support surface 110 is an inclined surface in a direction away from the substrate main body 101 as going to the outer side in the radial direction of the spring main body 151. In other words, the height dimension H of the support surface 110 increases toward the radially outer side of the spring main body 151. In this example, the support surface 110 has a shape in which a straight line is directed away from the substrate main body 101 as it goes to the outer side in the radial direction of the spring main body 151. However, the support surface may be formed of a curved surface that curves in a direction away from the substrate main body 101 as going to the radially outer side of the spring main body 151. If the support surface 110 is a smooth surface, the user can feel a good feeling of operation.
The restricting member 109 is not limited to the configuration of the present example. For example, the restricting member may be configured to overlap the spring member 150a in the height direction in both the power-off state and the power-on state. Further, the restricting member may be enlarged within a range in which the restricting member does not interfere with a member other than the spring member 150a (for example, the pivot member 130a) when the switching device 10a performs a state transition between the power-off state and the power-on state. Further, the support surface of the regulating member may be a flat surface instead of an inclined surface.
[4. operation of switchgear ]
The operation of the switch device 10a of the present example will be described below with reference to fig. 3A and 3B. As described above, the switching device 10a switches between the power-on state in which the pair of switch terminals 120c and 120d are conductive to each other and the power-off state in which they are nonconductive to each other. In addition, fig. 3A shows a power supply off state of the switching device 10 a. On the other hand, fig. 3B shows a power-on state of the switching device 10 a.
[4.1 action in State transition from Power-OFF State to Power-ON State ]
First, the operation of the switching device 10a when the state transition is made from the power-off state to the power-on state will be described. The operation of the variable resistor 30 is substantially the same as that of a conventionally known variable resistor, and therefore, the description thereof is omitted.
When the user rotates the operation shaft 20 in the clockwise direction of fig. 3A from the state shown in fig. 3A, the rotation shaft 160 rotates in the clockwise direction of fig. 3A together with the operation shaft 20. Then, the transmission engagement portion 162 of the rotation shaft 160 engages with the cam side engagement portion 144 of the cam 140 a.
Next, the cam 140a is rotated by a predetermined angle in the counterclockwise direction in fig. 3A about the pivot 143 due to the engagement between the transmission engaging portion 162 and the cam side engaging portion 144. As the cam 140a rotates, the spring member 150a elastically deforms from the first state shown in fig. 3A to the second state shown in fig. 3B, and rotates the rotating member 130a clockwise in fig. 3A about the pivot 143. As a result, as shown in fig. 3B, the movable contact piece 131c of the rotating member 130a contacts the fixed contact piece 122 of the one switch terminal 120 c.
As described above, the rotating member 130a is electrically connected to the other switch terminal 120d via the pivot 143. Therefore, the pair of switch terminals 120c and 120d are in a state of conduction (power on state) via the rotating member 130 a. In such a power-on state, the intermediate portion of the spring member 150a does not overlap with the rotating member 130a in the height direction. On the other hand, the intermediate portion of the spring member 150a overlaps the support surface 110 of the regulating member 109 in the height direction.
Further, when the spring member 150a rotates the rotating member 130a clockwise in fig. 3A in accordance with the rotation of the cam 140a, the spring member 150a elastically deforms and transits from a first state in which the amount of deflection is small (in other words, the curvature is small) as shown in fig. 3A to a second state in which the amount of deflection is large (in other words, the curvature is large) as shown in fig. 3B.
At this time, the intermediate portion of the spring member 150a is displaced so as to go radially outward of the spring main body 151. Further, when the state transitions, the intermediate portion of the spring member 150a is displaced in a state where it is supported from the substrate 100a side by the support surface 110 of the regulating member 109. That is, the intermediate portion of the spring member 150a is restricted from being displaced in the direction approaching the substrate 100a by the restricting member 109.
Specifically, the intermediate portion of the spring member 150a is guided in a direction away from the substrate 100a as the state transition progresses due to the abutment with the support surface 110 of the regulating member 109. At this time, a force in a direction of pulling out from the movable side locking portion 134 of the rotating member 130a is less likely to act on the first locking portion 152 of the spring member 150 a. In the power-on state, the spring member 150a biases the rotating member 130a in the clockwise direction of fig. 3A based on its elastic deformation.
[4.2 actions when State transition is made from Power-on State to Power-off State ]
Next, the operation of the switching device 10a when the state transitions from the power-on state to the power-off state will be described.
When the user rotates the operation shaft 20 in the counterclockwise direction of fig. 3B from the state shown in fig. 3B, the rotation shaft 160 rotates in the counterclockwise direction of fig. 3B together with the operation shaft 20. Then, the cam 140a rotates clockwise in fig. 3B about the pivot 143 by a predetermined angle due to the engagement between the transmission engagement portion 162 of the rotation shaft 160 and the cam side engagement portion 144 of the cam 140 a.
As the cam 140a rotates, the spring member 150a elastically deforms from the second state shown in fig. 3B to the first state shown in fig. 3A, and rotates the rotating member 130a counterclockwise in fig. 3B about the pivot 143.
As shown in fig. 3A, movable contact piece 131c of rotating member 130a is separated from fixed contact piece 122 of one switch terminal 120 c. In this state, the pair of switch terminals 120c and 120d are in a power-off state shown in fig. 3A, in which they are not in conduction with each other. In the power-off state, the middle portion of the spring member 150a overlaps the rotating member 130a with a gap therebetween in the height direction over the entire length.
When the spring member 150a rotates the rotating member 130a counterclockwise in fig. 3B in accordance with the rotation of the cam 140a, the spring member 150a shifts from the second state in which the amount of deflection is large (in other words, the curvature is large) as shown in fig. 3B to the first state in which the amount of deflection is small (in other words, the curvature is small) as shown in fig. 3A. At this time, the intermediate portion of the spring member 150a is displaced so as to go radially inward of the spring main body 151.
Further, when the state transitions, the intermediate portion of the spring member 150a is displaced while abutting against the support surface 110 of the regulating member 109. At this time, the middle portion of the spring member 150a is displaced in a direction approaching the substrate 100a, but is not displaced to a side closer to the substrate 100a than the one side surface of the rotating member 130 a.
[5. remarks ]
In one example of the embodiment, the pivot 143 is provided separately from the substrate 100 a. However, a pivot portion (not shown) corresponding to the pivot 143 may be provided integrally with the substrate 100 a. In this case, the cam 140a and the pivot member 130a are rotatably supported by the pivot portion. In the embodiment, the shaft that serves as the rotation center of the cam 140a and the shaft that serves as the rotation center of the rotating member 130a are both constituted by the pivot 143. However, the shaft that becomes the rotation center of the cam 140a and the shaft that becomes the rotation center of the rotating member 130a may be configured by different shafts.
[6 ] operation and Effect of the embodiment
According to the switch device 10a of the present example having the above-described configuration, it is possible to prevent the spring member 150a from being displaced to a position closer to the substrate 100a than the one side surface of the rotating member 130a while ensuring durability of the rotating member 130 a.
That is, in the case of this example, when the state of the switching device 10a shifts from the power-off state to the power-on state, the restricting member 109 that supports the intermediate portion of the spring member 150a from the base plate 100a side is provided on the base plate 100a, not on the rotating member 130 a. Therefore, the contact area between the spring member 150a and the rotating member 130a can be reduced at the time of the state transition. As a result, the abrasion between the spring member 150a and the rotary member 130a during the state transition can be reduced, and the durability of the rotary member 130a can be improved.
In addition, in the side surface on one side of the substrate main body 101, in the power-on state shown in fig. 3B, a support surface 110 of the regulating member 109 is provided at a portion overlapping with the intermediate portion of the spring member 150a in the height direction. During the state transition, the intermediate portion of the spring member 150a is displaced (in other words, elastically deformed) so as to be farther from the substrate main body 101 as the state transition progresses due to the contact with the support surface 110. Therefore, the intermediate portion of the spring member 150a is restricted from being displaced to a position closer to the substrate 100a than the one side surface of the rotating member 130a when the state transitions by the support surface 110 of the restricting member 109. As a result, the force in the direction of pulling out from the movable-side locking portion 134 of the rotating member 130a is less likely to act on the first locking portion 152 of the spring member 150a, and the engagement between the first locking portion 152 of the spring member 150a and the movable-side locking portion 134 of the rotating member 130a is less likely to fall off.
In the case of this example, it is not necessary to provide a separate retaining structure, and the first locking portion 152 of the spring member 150a can be prevented from coming off the movable-side locking portion 134 of the pivot member 130 a. As a result, the number of parts can be reduced, and thus the manufacturing cost can be reduced.
Further, since the regulating member 109 as described above can be formed integrally with the substrate 100a by injection molding, the number of parts does not increase.
In the case of this example, when the switching device 10a shifts from the power-off state to the power-on state, the intermediate portion of the spring member 150a is displaced so as to be farther away from the rotating member 130a as the state shifts further, due to the contact with the support surface 110 of the regulating member 109. Therefore, interference between the spring member 150a and the rotating member 130a at the time of the state transition can be prevented. As a result, abrasion between the spring member 150a and the rotating member 130a can be prevented, and the durability of the switch device 10a can be improved, and the operational feeling given to the user can be improved.
Industrial applicability
The variable resistor switching device according to the present invention can be suitably used as a variable resistor switching device having various configurations.
Description of the reference numerals
1 variable resistor with switch
10. 10a switch device
100. 100a substrate
109 restricting member
120c, 120d switch terminal
130. 130a rotating member
140. 140a cam
150. 150a spring member
Claims (3)
1. A switching device for a variable resistor, comprising:
a substrate;
a pair of switch terminals supported by the substrate;
a cam rotatably disposed on the base plate;
a rotating member that is disposed on the substrate and switches a connection state between the pair of switch terminals according to rotation of the cam;
a spring member having one end portion thereof locked to the rotary member and the other end portion thereof locked to the cam, the spring member rotating the rotary member in accordance with the rotation of the cam; and
and a restricting member that is provided on the substrate and restricts displacement of the spring member in a direction approaching the substrate.
2. The switching device for a variable resistor according to claim 1,
in the restricting, the spring member has a portion that is not supported by another member on both sides of a portion supported by the restricting member.
3. The switching device for a variable resistor according to claim 1,
the rotating member rotates by pushing out a portion to which the spring member is locked by one end of the spring member when the cam rotates,
a portion of the spring member abutting against the regulating member is arc-shaped and moves outward in a radial direction of the spring member on the regulating member when the cam rotates,
the height of the regulating member becomes higher as it goes further to the outside in the radial direction of the spring member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/084010 WO2018092224A1 (en) | 2016-11-16 | 2016-11-16 | Switch device for variable resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109891523A CN109891523A (en) | 2019-06-14 |
| CN109891523B true CN109891523B (en) | 2021-03-16 |
Family
ID=62145313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680090399.4A Active CN109891523B (en) | 2016-11-16 | 2016-11-16 | Switching device for variable resistor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6530869B2 (en) |
| CN (1) | CN109891523B (en) |
| TW (1) | TWI713068B (en) |
| WO (1) | WO2018092224A1 (en) |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144607U (en) * | 1985-02-27 | 1986-09-06 | ||
| JPS621333U (en) * | 1985-06-20 | 1987-01-07 | ||
| JPH0451400Y2 (en) * | 1986-09-04 | 1992-12-03 | ||
| JPH051866Y2 (en) * | 1987-03-27 | 1993-01-19 | ||
| JPH0343704U (en) * | 1989-09-08 | 1991-04-24 | ||
| US5150095A (en) * | 1991-04-04 | 1992-09-22 | Appliance Control Technology, Inc. | Multi-position rotary switch with position sensor |
| JP3043704U (en) * | 1997-05-23 | 1997-11-28 | 恒春 顧 | Electric pencil sharpener |
| US5824979A (en) * | 1997-06-18 | 1998-10-20 | Illinois Tool Works Inc. | Accelerator module |
| EP0899752A1 (en) * | 1997-08-29 | 1999-03-03 | Eaton Corporation | Rotary movement transducer |
| JP2000188040A (en) * | 1998-12-24 | 2000-07-04 | Teikoku Tsushin Kogyo Co Ltd | Switch mechanism |
| JP2005223205A (en) * | 2004-02-06 | 2005-08-18 | Alps Electric Co Ltd | Sliding electric component |
| JP2005259634A (en) * | 2004-03-15 | 2005-09-22 | Alps Electric Co Ltd | Rotary electrical component |
| US20090132171A1 (en) * | 2005-05-31 | 2009-05-21 | Jcl Bioassay Corporation | Screening Method for Specific Protein in Proteome Comprehensive Analysis |
| US7847674B2 (en) * | 2005-12-01 | 2010-12-07 | Gerfast Sten R | Two terminal variable resistor |
| JP2009135426A (en) * | 2007-11-09 | 2009-06-18 | Alps Electric Co Ltd | Operating force regulation apparatus |
| JP5028236B2 (en) * | 2007-11-30 | 2012-09-19 | 佐鳥エス・テック株式会社 | Trigger switch |
| JP5001866B2 (en) * | 2008-01-15 | 2012-08-15 | ルネサスエレクトロニクス株式会社 | Loss signal repair method and loss signal repair circuit |
| JP5155245B2 (en) * | 2009-04-21 | 2013-03-06 | アルプス電気株式会社 | Rotating electrical parts with switch |
| JP5166363B2 (en) * | 2009-06-30 | 2013-03-21 | 東京コスモス電機株式会社 | Potentiometer |
| US8766121B2 (en) * | 2011-05-26 | 2014-07-01 | Motorola Solutions, Inc. | Rotary control switch |
| US8456271B1 (en) * | 2012-04-04 | 2013-06-04 | Ifm Electronic Gmbh | Optical proximity switch |
-
2016
- 2016-11-16 WO PCT/JP2016/084010 patent/WO2018092224A1/en active Application Filing
- 2016-11-16 JP JP2018550925A patent/JP6530869B2/en active Active
- 2016-11-16 CN CN201680090399.4A patent/CN109891523B/en active Active
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2017
- 2017-07-31 TW TW106125743A patent/TWI713068B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018092224A1 (en) | 2018-05-24 |
| CN109891523A (en) | 2019-06-14 |
| TW201820369A (en) | 2018-06-01 |
| TWI713068B (en) | 2020-12-11 |
| JPWO2018092224A1 (en) | 2019-06-24 |
| JP6530869B2 (en) | 2019-06-12 |
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