TWI713068B - Switch device for variable resistor - Google Patents

Abstract

The invention provides a switching device for a variable rheostat, used to ensure durability of a moving member while restrict displacement of a spring member in a direction approaching a substrate. The switching device includes the substrate (100a), a pair of switch terminals (120c, 120d), supported by the substrate (100a), a cam (140a) rotatably supported on the substrate (100a), a rotating member (130a) disposed on the substrate (100a) for switching the connection state between the pair of switch terminals (120c, 120d) according to the rotation of the cam (140a), the spring member (130a) with one end being engaged by the rotating member (130a) while the other end being engaged by the cam (140a) and rotating the rotating member (130a) according to the rotation of the cam (140a), and a restricting member (109) disposed on the substrate (100a) for restricting the displacement of the spring member (150a) in the direction approaching the substrate (100a).

Description

Switch device for variable resistor

The present invention relates to a switch device for a variable resistor.

In Patent Document 1, a switch device 10 for a variable resistor as shown in FIG. 1 is described. Such a switch device 10 for a variable resistor is a device for switching the power supply of a variable resistor (not shown) used for volume adjustment of a car audio device. Specifically, the switch device 10 for a variable resistor as shown in FIG. 1 includes a rotating shaft (not shown) that rotates together with an operating shaft (not shown) of the variable resistor, a substrate 100, and a pair of switching terminals 120a, 120b, rotating member 130, cam 140, and spring member 150.

The rotating member 130 and the cam 140 are rotatably supported by the substrate 100. Such a rotating member 130 can be rotated through, and a first state in which a pair of switching terminals 120a, 120b is not conductive (the power OFF state shown in FIG. 1) can be obtained, and a pair of switching terminals 120a, 120b can pass through the rotating member 130 And the second state of conduction (illustration omitted). The spring member 150 is tied at one end to the rotating member 130 while the other end is locked to the cam 140. The spring member 150 rotates the rotating member 130 in response to the rotation of the cam 140.

In the case of the switch device 10 for a variable resistor described in Patent Document 1 having the above structure, if the cam 140 rotates in the clockwise direction of FIG. 1 with the rotation of the rotating shaft from the state shown in FIG. The spring member 150 rotates counterclockwise in FIG. 1 in response to the rotation of the cam 140. Then, the movable armatures 131a, 131b of the rotating member 130 contact the pair of switching terminals 120a, 120b. As a result, a pair of terminals 120a, 120b pass through the rotating member 130 into a conductive state (also That is, the power ON state). In addition, if the cam 140 rotates counterclockwise in FIG. 1 with the rotation of the rotating shaft from the power ON state of the switch device 10, the spring member 150 will rotate the rotating member 130 in the clockwise direction in FIG. 1 in response to the rotation of the cam 140 , The switch device 10 is turned off.

Advanced technical literature Patent literature

Patent Document 1: Japanese Kokai Publication No. 61-144607

By the way, in the case of the invention described in Patent Document 1, if the aforementioned power switching operation is repeated, for example, in the state shown in FIG. 1, a portion of the spring member 150 that is not supported by other members (specifically In other words, the part shown by the diagonal lattice pattern α in FIG. 1 is displaced toward the substrate, and the lock between one end of the spring member 150 (the upper end in FIG. 1) and the rotating member 130 may be easily released. Sex. In the case of the structure described in Patent Document 1, the movable armature 131a of the rotating member 130 can support the longitudinal middle portion of the spring member 150 from the base 100 side. However, due to repeated wear between the movable armature 131a and the spring member 150, the durability of the rotating member 130 may be reduced.

The object of the present invention is to realize a structure in which the spring member is difficult to be displaced toward the substrate while ensuring the durability of the rotating member.

The variable resistance switch device of the present invention is provided with a substrate; a pair of switching terminals supported by the substrate; a cam rotatably arranged on the substrate; a rotating member arranged on the substrate, According to the rotation of the cam, the connection state of the pair of switch terminals is switched; the spring member, one end is locked to the rotating member and the other end It is locked to the cam and rotates the rotating member in response to the rotation of the cam; and a restricting member is provided on the base plate to restrict the displacement of the spring member in a direction approaching the base plate.

According to the present invention, it is possible to restrict the displacement of the spring member in the direction close to the substrate while ensuring the durability of the rotating member.

1: With switch variable resistor

10.10a: Switching device

20: operating axis

30: Variable resistor

100, 100a: substrate

101: Substrate body

102: side wall element

103: Through hole

105: Board side shaft support

106: Avoid the recess

107: Guide recess

108: Armature Configuration Department

109: Restriction member

110: support surface

111: gap

120c, 120d: terminal for switch

121a, 121b: tip

122: fixed side armature

130, 130a: rotating member

131c: movable armature

132: Shaft through hole

133: Movable side shaft support

134: movable side locking part

135: movable side guide piece

136: Ring part

137: The first expansion part

138: The second expansion part

140, 140a: cam

141: Cam body

142: Cam side shaft support

143: Pivot

144: Cam side joint

145: Cam side locking part

150, 150a: Spring member

151: Spring body

152: The first locking part

153: The second locking part

160: rotation axis

161: Rotation Support

162: transfer lock

170: housing components

171: Upper wall element

172: side wall elements

300a, 300b: Terminals for resistors

Fig. 1 is a plan view for explaining the structure of a conventional variable resistor switch device.

Fig. 2 is a schematic perspective view for explaining a variable resistor with a switch incorporated in the variable resistor switch device of the present invention.

Fig. 3A is a plan view showing the power-off state of the switch device for a variable resistor according to an example of the embodiment of the present invention, with a case element omitted.

Fig. 3B is a plan view showing the power-on state of the switch device for a variable resistor according to an example of the embodiment, with the case element omitted.

Fig. 4 is an exploded perspective view of a switch device for a variable resistor according to an example of the embodiment.

Fig. 5 is a plan view of a substrate and a pair of switching terminals of a switch device for a variable resistor according to an example of the embodiment.

Fig. 6 is a plan view of a rotating member of a switch device for a variable resistor according to an example of the embodiment.

Fig. 7 is a plan view of a cam of a switch device for a variable resistor according to an example of the embodiment.

Fig. 8 is a schematic cross-sectional view corresponding to the A-A section of Fig. 3B.

2 to 8, an example of the embodiment of the variable resistor switch device of the present invention will be described in detail.

[1 About variable resistor with switch]

First, referring to FIG. 2, an outline of the structure of a variable resistor with a switch incorporating the switch device for a variable resistor of the present invention will be described. Fig. 2 is a perspective view of a variable resistor with a switch incorporating the switch device for a variable resistor of the present invention.

The variable resistor with switch 1 shown in FIG. 2 includes an operating shaft 20, a variable resistor 30, and a switch device 10a.

The operating shaft 20 is used to perform the following operations, such as the operation of changing the resistance of the variable resistor 30 by rotating the user, and the switching operation of the power supply of the switch device 10a (hereinafter referred to as "Power switching operation").

The variable resistor 30 changes the resistance between the resistor terminals 300a and 300b in response to the rotation of the operating shaft 20. In addition, since the structure of the variable resistor 30 is almost the same as the structure of the conventional variable resistor described in the aforementioned Patent Document 1, for example, detailed description is omitted.

The switch device 10a corresponds to the switch device for a variable resistor of the present invention, and is installed in a state adjacent to the variable resistor 30. Such a switch device 10a switches the power ON state in which the switching terminals 120c and 120d are connected to each other, and the power OFF state in which the switching terminals 120c and 120d are not connected to each other in response to the rotation of the operating shaft 20. The specific structure of the switch device 10a will be described later.

[2 Overall structure of the switch device as an example of the embodiment]

Next, referring to FIGS. 3A to 4, the outline of the overall structure of the switch device 10a will be described. In addition, after describing the outline of the overall structure of the switch device 10a, the specific structure of each part constituting the switch device 10a will be described. FIG. 3A shows the power OFF state of the switch device 10a with the housing element 170 omitted. FIG. 3B shows the power ON state of the switch device 10a with the housing element 170 omitted. Fig. 4 is an exploded perspective view showing the switch device 10a.

The switch device 10a includes a substrate 100a, a housing element 170, a pair of switching terminals 120c, 120d, a rotating shaft 160, a rotating member 130a, a cam 140a, a spring member 150a, and a restricting member 109.

The substrate 100a and the housing element 170 are combined to form a switch housing having a substantially rectangular parallelepiped internal space. The pair of switch terminals 120c and 120d are held on the substrate 100a in a state where a part of each of them extends to the outer space of the switch housing. In addition, the rotating shaft 160, the rotating 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 housing.

The rotating shaft 160 transmits the rotation of the operating shaft 20 (refer to FIG. 2) to the cam 140a. The spring member 150a is hung between the cam 140a and the rotating member 130a, and rotates the rotating member 130a in response to the rotation of the cam 140a. The rotating member 130a is rotated in response to the rotation of the cam 140a, and a first state (that is, the state shown in FIG. 3A) in which a pair of switching terminals 120c and 120d are not connected to each other can be obtained, and a pair of switching terminals 120c, 120d The second state (that is, the state shown in FIG. 3B) in which they are conducted through the rotating member 130a.

In the case of the aforementioned switch device 10a, when the operating shaft 20 rotates in a predetermined direction from the power OFF state shown in FIG. 3A, the rotation system is transmitted to the cam 140a through the rotating shaft 160. In this way, in response to the rotation of the cam 140a, the spring member 150a is elastically deformed, and the rotating member 130a is rotated. As a result, the pair of switching terminals 120c and 120d are in a power ON state through the rotating member 130a.

On the other hand, when the operating shaft 20 rotates in a direction opposite to the predetermined direction from the power-on state, the rotation system is transmitted to the cam 140a through the rotating shaft 160. In this way, the spring member 150a rotates the rotating member 130a in response to the rotation of the cam 140a. As a result, the rotating member 130a is isolated from at least one of the pair of switching terminals 120c and 120d, and the pair of switching terminals 120c and 120d are in a non-conducting power OFF state.

In addition, the restriction member 109 restricts the displacement of the spring member 150a in the direction approaching the substrate 100a during the power switching operation of the switch device 10a.

[2.1 The structure of each part of the switchgear]

Next, referring to FIGS. 3A to 8, a description will be given of the substrate 100a, the housing element 170, the pair of switch terminals 120c, 120d, the rotating shaft 160, the rotating member 130a, the cam 140a, the spring member 150a, and the restricting member 109 constituting the switch device 10a Specific structure.

In addition, in the following description of the present embodiment, for convenience of description, the orthogonal coordinate system (W, L, T) shown in FIGS. 3A, 3B, and 5 is used for the direction of each part. In the orthogonal coordinate system (W, L, T), the "positive direction" of the W axis is the right side of each figure, and the "positive direction" of the L axis is the upper side of each figure, and the same is the "positive direction" of the T axis. Department of the front side of each figure.

The W-axis direction is also referred to as the "width direction" of the switch device 10a and the substrate 100a in the combined state. In addition, the L-axis direction is also referred to as the "longitudinal direction" of the switch device 10a and the substrate 100a in the combined state. Furthermore, the T-axis direction is also referred to as the "height direction" of the switch device 10a and the substrate 100a in the combined state.

"One" of "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" of the "width direction", "length direction" and "height direction" corresponds to the "negative direction" of the W axis, the L axis, and the T axis.

[2.1.1 About the substrate]

As shown in FIG. 5, in this embodiment, the substrate 100a has a rectangular plate-shaped substrate body 101 and a side wall element 102 provided at the other end of the substrate body 101 in the longitudinal direction. The substrate body 101 constitutes the lower wall of the cuboid-shaped switch housing, and the side wall element 102 constitutes one of the four side walls of the switch housing.

The substrate main body 101 has a through hole 103, a substrate-side shaft support portion 105, an avoidance recess 106, a guide recess 107, an armature arrangement portion 108, and a restricting member 109.

A through hole 103 is formed substantially in the center of the substrate main body 101. Such a through hole 103 is inserted into the rotating shaft 160 inside.

The substrate-side shaft support 105 is a pivot 143 that supports the rotation center of the cam 140a and the rotating member 130a described later. Such a substrate-side shaft support portion 105 is a through hole formed at one end in the width direction of the substrate main body 101 and the other end in the longitudinal direction (that is, the lower right in FIG. 5 ). And, the pivot shaft 143 is arranged in parallel with the rotation shaft 160.

The avoidance recess 106 prevents the front end of the first locking portion 152 of the spring member 150a from interfering with the substrate body 101. This avoidance recess 106 is formed on one side surface of the substrate main body 101, sandwiching the through hole 103 and the substrate-side shaft support portion 105, which is the opposite part (that is, the upper left part of FIG. 5). Recess.

The guiding recess 107 guides the rotation of the rotating member 130a by being locked with the movable-side guide piece 135 of the rotating member 130a. Such a guide recess 107 is an arc-shaped recess formed in a portion adjacent to the other side (lower side in FIG. 5) of the avoiding recess 106 in the longitudinal direction of one side surface of the substrate body 101.

The armature arrangement part 108 arranges the fixed side armature 122 of the switch terminal 120c of one of a pair of switch terminals 120c and 120d. The armature arrangement portion 108 is defined by a notch 111 formed on one end surface of the substrate body 101 in the width direction.

[2.1.2 About housing components]

The housing element 170 has a rectangular plate-shaped upper wall element 171 constituting the upper wall of the switch housing, and three rectangular plate-shaped side wall elements 172 constituting three of the four side walls of the switch housing. As described above, the housing element 170 is assembled on the substrate 100a to form a switch case.

[2.1.3 About a pair of switch terminals]

The pair of switch terminals 120c and 120d correspond to a pair of terminals and are metal wires. In addition, the pair of switch terminals 120c and 120d are embedded in the substrate 100a with the respective front end portions 121a and 121b exposed to the outside. Such a pair of switch terminals 120c and 120d are embedded in the substrate 100a by injection molding (insert molding).

Specifically, the front end 121a of one switch terminal 120c protrudes from the other end surface (the lower end surface of FIG. 3A) in the longitudinal direction of the substrate body 101 to the outside of the substrate body 101. In addition, the switch terminal 120c at one end has a rectangular plate-shaped fixed side armature 122. The fixed-side armature 122 is exposed to the outside from the bottom of the notch 111 of the base body 101 and is arranged on the armature arrangement portion 108. In addition, the front end 121a of the switch terminal 120c and the fixed side armature 122 are conducted through one end of the switch terminal 120c embedded in the continuous portion (not shown) of the substrate body 101.

The front end 121b of the switch terminal 120d at the other end protrudes from the other end surface in the longitudinal direction of the substrate body 101 to the outside. The base end of the switch terminal 120c at the other end is electrically connected to the rotating member 130a through the pivot 143 supported by the substrate-side shaft support 105 of the substrate main body 101. In addition, the number of terminals for switching is not limited to that of this embodiment.

[2.1.4 About the axis of rotation]

3A to 4, the rotating shaft 160 will be described.

At the other end of the operating shaft 20 (see FIG. 2) in the axial direction (in other words, the height direction), the rotating shaft 160 is fixed coaxially with the operating shaft 20. Such a rotating shaft 160 rotates together with the operating shaft 20. The rotating shaft 160 can be constituted by a shaft-shaped member provided as an integral or independent body with the operating shaft 20. Such a rotating shaft 160 rotates the cam 140a described later in response to the rotation of the operating shaft 20.

Specifically, in this embodiment, the rotating shaft 160 is a hollow member made of synthetic resin. In addition, the cross-sectional shape of the inner peripheral surface of the rotating shaft 160 (in other words, the cross-sectional shape orthogonal to the axial direction of the rotating shaft 160) is rectangular or elliptical. Such a rotating shaft 160 has a rotating support part 161 and a transmission locking part 162.

The rotation support portion 161 is locked to the substrate 100a and supports the rotation shaft 160 rotatably with respect to the substrate 100a.

The transmission lock portion 162 is locked with the cam 140a described later, and transmits the rotation of the rotating shaft 160 to the cam 140a. The transmission lock portion 162 is a convex portion formed on the outer peripheral surface of the rotating shaft 160.

The rotating shaft 160 is externally fitted on the end of the operating 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 body 101. Thereby, the rotating shaft 160 is supported on the substrate 100a in a rotatable state.

[2.1.5 About rotating components]

3A to 4, 6, the rotating member 130a will be described.

The rotating member 130a is supported by a pivot 143 supported by the base plate 100a in a rotatable state. The rotating member 130a is always conducted through the switch terminal 120d at the other end and the pivot 143. In addition, the rotating member 130a obtains a contact state (in other words, a conductive state) and a non-contact state (in other words, a non-conductive state) for the switch terminal 120c at one end according to its own rotation angle.

Specifically, the rotating member 130a is a metal plate-shaped member, and has a shaft insertion hole 132, a movable-side shaft support portion 133, a movable-side lock portion 134, a movable armature 131c, and a movable-side guide piece 135.

The shaft insertion hole 132 is used to insert the rotation shaft 160 inside. Such a shaft insertion hole 132 is a through hole formed by an annular portion 136 (refer to FIG. 6) in the rotating member 130a.

The movable-side shaft support portion 133 is a through hole formed in the first expansion portion 137 (refer to FIG. 6) extending from the annular portion 136 to the outer side in the diameter direction (specifically, the diameter direction of the annular portion 136). The pivot 143 is inserted into the movable side shaft support 133. Thereby, the rotating member 130a is supported on the substrate 100a in a state capable of rotating around the pivot shaft 143.

The other end of the spring member 150a is locked at the movable side locking portion 134. Specifically, in this embodiment, the movable side locking portion 134 extends from the annular portion 136 to the diameter direction (specifically In other words, the through hole formed in the second expansion portion 138 (refer to FIG. 6) outside the annular portion 136 in the diameter direction.

The movable armature 131c can obtain a contact (in other words, conductive) state and the same non-contact (in other words, non-conductive) state with the fixed side armature 122 of the switching terminal 120c of one terminal in response to the rotation of the rotating member 130a. Such a movable armature 131c extends from the end (the right end of FIG. 3A, FIG. 3B, and FIG. 6) at one end in the width direction among the outer periphery of the annular portion 136 to the outer side in the diameter direction of the annular member 136 .

The movable-side guide piece 135 is locked with the guide recess 107 of the substrate body 101 to guide the rotation of the rotating member 130a. Such movable-side guide piece 135 extends in a state of being bent from the outer peripheral edge of the annular portion 136 in a direction approaching the substrate body 101.

As the aforementioned rotating member 130a is used to insert the pivot 143 supported by the substrate-side shaft support portion 105 of the substrate body 101 into the movable-side shaft support portion 133, the movable-side guide piece 135 is locked on the guide of the substrate body 101 The state of the recessed portion 107 is arranged on the other side surface of the substrate body 101.

In this state, the rotating shaft 160 is inserted inside the through hole 132 of the rotating member 130a. Within a range where the movable side guide piece 135 can be displaced inside the guide recess 107, the rotating member 130a can rotate around the pivot 143.

This kind of rotating member 130a can be separated from at least one end of a pair of switch terminals 120c and 120d (in this embodiment, the other end of the switch terminal 120d) in a first state (as shown in FIG. 3A). State) and a second state in which the two terminals of the pair of switch terminals 120c and 120d are in contact (the state shown in FIG. 3B).

In the above-mentioned second state, the pair of switching terminals 120c and 120d are electrically connected to each other through the rotating member 130a. In addition, the above-mentioned first state corresponds to the power-off state of the switching device 10a, and the above-mentioned second state corresponds to the power-on state of the switching device 10a.

[2.1.6 About the cam]

With reference to FIGS. 3A to 4 and 7, the cam 140a will be described.

The cam 140a is supported on the pivot 143 supported by the base plate 100a in a state of being able to rotate around the pivot 143. In addition, the cam 140a is arranged at a position farther from the substrate main body 101 than the rotating member 130a. This kind of cam 140a rotates around the pivot 143 in response to the rotation of the rotating shaft 160 to obtain the first state (the state shown in FIG. 3A) corresponding to the power OFF state of the switch device 10a and the equivalent of the switch device 10a The second state of the power ON state (the state shown in Figure 3B).

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 at the base end of the cam main body 141.

The cam body 141 has a cam-side engagement portion 144 and a cam-side locking portion 145.

The cam-side engagement portion 144 is locked with the transmission engagement portion 162 of the rotating shaft 160 and transmits the rotation of the rotating shaft 160 to the cam body 141. Such a cam-side engagement portion 144 is a recess formed at the front end portion of one side of the cam body 141 (the surface of FIG. 3A, FIG. 3B, and FIG. 7).

The cam-side locking portion 145 is used to lock the other end of the spring member 150a. The cam-side locking portion 145 is a through hole formed at the bottom of the cam-side engagement portion 144 to penetrate the cam body 141.

The cam-side shaft support portion 142 supports the cam 140a with respect to the pivot shaft 143 in a state capable of rotating around the pivot shaft 143. Such a cam-side shaft support portion 142 is a partial cylindrical member having a C-shaped cross-sectional shape. Such a cam side shaft support portion 142 is integrally provided on the base end portion of the cam body 141.

The aforementioned cam 140a is supported by inserting a part of the pivot 143 on the side of the base body 101 farther from the base body 101 than the part supported by the rotating member 130a into the cam side shaft supporting portion 142. In this state, the cam-side engagement portion 144 of the cam body 141 can be connected to the transmission of the rotating shaft 160 Section 162 is connected. The rotation of the rotating shaft 160 is transmitted to the cam body 141 (that is, the cam 140a) through the connecting portion of the transmission connecting portion 162 and the cam side connecting portion 144.

[2.1.7 About the spring member]

3A to 4, the spring member 150a will be described.

The spring member 150a is composed of a substantially circular arc-shaped metal wire material having elasticity. The spring member 150a rotates the rotating member 130a and the cam 140a in opposite directions in response to the rotation of the cam 140a.

Specifically, the spring member 150a has 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 body 151 toward the substrate body 101. On the other hand, the second locking portion 153 extends from the other end of the spring body 151 in a direction away from the substrate body 101.

As mentioned above, the spring member 150a is inserted into the movable side locking portion 134 of the rotating member 130a from the side away from the substrate body 101 relative to the first locking portion 152, and the second locking portion 153 is inserted into the cam 140a from the side close to the substrate body 101 The state of the cam body 145 is assembled. That is, the spring body 151 of the spring member 150a is arranged between the rotating member 130a and the cam 140a (specifically, the cam body 141) with respect to the height direction.

In this state, in response to the rotation of the cam 140a, the spring member 150a is in the first state (the state shown in FIG. 3A) in which the amount of deformation of the spring member 150a is small and the second state in which the amount of deformation of the spring member 150a is large (shown in FIG. 3B) (Showing state), while elastic deformation while state transition. In addition, the above-mentioned first state corresponds to the power-off state of the switching device 10a, and the above-mentioned second state corresponds to the power-on state of the switching device 10a.

〔3 Regarding restriction members〕

The restricting member 109 restricts one of the spring members 150a in such a manner that the longitudinal middle portion of the spring member 150a (hereinafter, simply referred to as "the middle portion of the spring member 150a") does not move to a position closer to the substrate 100a than the rotating member 130a Displacement.

Hereinafter, the specific structure of the restricting member 109 will be described with reference to FIGS. 3A, 3B, and 8. As mentioned above, the restricting member 109 restricts the portion of the spring member 150a that is not supported by other members (specifically, members other than the base plate 101) so that it does not move to a position closer to the base plate 100a than one side surface of the rotating member 130a. .

In this embodiment, the restricting member 109 is arranged on one side surface of the substrate body 101 and overlaps the middle portion of the spring member 150a in the height direction when the switch device 10a is in the power ON state shown in FIG. 3B.

Specifically, the restricting member 109 is disposed on one side surface of the substrate body 101, and when the power is turned on, it overlaps with a portion of the middle portion of the spring member 150a on the cam 140a side in the height direction.

In addition, there is a gap in the height direction between the two side portions of the spring member 150a overlapping the restricting member 109 in the height direction and one side surface of the substrate body 101 in the power-on state. In other words, in the power-ON state, there are portions on both sides of the length direction of the portion of the spring member 150a that overlaps the restricting member 109 in the height direction that are not supported by other members.

In this embodiment, the restricting member 109 does not overlap the spring member 150a in the height direction in the power OFF state of the switch device 10a (the state shown in FIG. 3A). On the other hand, in the power ON state, the restricting member 109 overlaps the spring member 150a in the height direction.

That is, the restricting member 109 starts to overlap the spring member 150a in the height direction during the state transition of the switch device 10a from the power-off state to the power-on state. In addition, in this embodiment, the restricting member 109 may be provided integrally with the substrate body 101. However, the restricting member 109 can also be provided as a separate body from the substrate body 101. And, as shown in Figure 3A, the restricting member 109 is preferably provided on at least one side surface of the substrate 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 of the restricting member 109 (the surface in FIGS. 3A, 3B, and 5, and the upper surface in FIG. 8), at least when the above-mentioned state transitions, a supporting surface 110 is formed on a portion overlapping the spring member 150a in the height direction. The supporting surface 110 has a shape that displaces the intermediate portion of the spring member 150a in a direction away from the substrate body 101 (in other words, one of the height directions, the upper part of FIG. 8) as the state transitions as described above.

Specifically, the supporting surface 110 is an inclined surface facing away from the substrate body 101 as it faces the outer side of the spring body 151 in the radial direction. In other words, the height dimension H of the supporting surface 110 increases toward the outer side of the spring body 151 in the radial direction. In this embodiment, the supporting surface 110 has a shape that linearly faces away from the substrate body 101 as it faces the radially outer side of the spring body 151. However, the support surface may also be configured as a curved surface that curves toward the direction away from the substrate body 101 as it goes toward the outside of the spring body 151 in the radial direction. If the support surface 110 is formed as a smooth surface, it can give the user a good sense of operation.

In addition, the restricting member 109 is not limited to the structure of this embodiment. For example, as the restriction member, a structure that overlaps the spring member 150a in the height direction can be adopted in either of the power-off state and the power-on state. In addition, when the switching device 10a is in a state transition between the power OFF state and the power ON state, the restricting member may be enlarged within a range that does not interfere with members other than the spring member 150a (for example, the rotating member 130a). In addition, the supporting surface of the restricting member may be a flat surface instead of an inclined surface.

[4. Regarding the operation of the switchgear]

Hereinafter, the operation of the switch device 10a of this embodiment will be described with reference to FIGS. 3A and 3B. As described above, the switching device 10a switches the power ON state and the same state in which the pair of switching terminals 120c and 120d are connected to each other. The power OFF state where the sample plot is not conducting. In addition, FIG. 3A shows the power OFF state of the switch device 10a. On the other hand, FIG. 3B shows the power ON state of the switch device 10a.

[4.1 Action when transitioning from the power-off state to the power-on state]

First, the operation of the switching device 10a when transitioning from the power-off state to the power-on state will be described. In addition, the operation of the variable resistor 30 is almost the same as that of a conventionally known variable resistor, so the description is omitted.

When the user rotates the operating shaft 20 from the state shown in FIG. 3A in the clockwise direction of FIG. 3A, the rotating shaft 160 will rotate together with the operating shaft 20 in the clockwise direction of FIG. 3A. In this way, the transmission locking portion 162 of the rotating shaft 160 is locked with the cam side engaging portion 144 of the cam 140a.

Then, based on the locking of the transmission locking portion 162 and the cam-side engagement portion 144, the cam 140a rotates the pivot 143 by a predetermined angle in the counterclockwise direction of FIG. 3A. Along with the rotation of the cam 140a, the spring member 150a is elastically deformed from the first state shown in FIG. 3A to the second state shown in FIG. 3B, while turning the rotating member 130a in the clockwise direction of FIG. 3A with the pivot 143 as the center. Spin. As a result, as shown in FIG. 3B, the movable armature 131c of the rotating member 130a comes into contact with the fixed side armature 122 of the switching terminal 120c at one end.

As mentioned above, the rotating member 130a is electrically connected to the switch terminal 120d at the other end through the pivot 143. Therefore, the pair of switching terminals 120c and 120d pass through the rotating member 130a and become a conductive state (power ON state). In this power-on state, the middle portion of the spring member 150a and the rotating member 130a do not overlap in the height direction. On the other hand, the middle portion of the spring member 150a overlaps with the support surface 110 of the restricting member 109 in the height direction.

In addition, as the cam 140a rotates, when the spring member 150a rotates the rotating member 130a in the clockwise direction of FIG. 3A, the spring member 150a is in the first state where the amount of deformation is small (in other words, the curvature is small) as shown in FIG. 3A, While elastically deforming, the state transitions to the second state where the amount of deformation is large (in other words, the curvature is large) as shown in FIG. 3B.

At this time, the middle portion of the spring member 150a is displaced toward the outside of the spring body 151 in the radial direction. In addition, when the above-mentioned state transitions, the intermediate portion of the spring member 150a is displaced in a state where the supporting surface 110 of the restricting member 109 is supported by the substrate 100a side. That is, the middle portion of the spring member 150a restricts the displacement in the direction approaching the substrate 100 through the restricting member 109.

Specifically, the intermediate portion of the spring member 150a is based on the abutment with the support surface 110 of the restricting member 109, and the more the state transition described above progresses, the more it is guided to a direction away from the substrate 100a. At this time, it becomes difficult to act on the first lock portion 152 of the spring member 150a with a force in the direction of disengaging from the movable side lock portion 134 of the rotating member 130a. In addition, in the power-on state, the spring member 150a urges the rotating member 130a in the clockwise direction of FIG. 3A based on its own elastic deformation.

[4.2 Actions when transitioning from the power ON state to the power OFF state]

Next, the operation of the switching device 10a when transitioning from the power-on state full state to the power-off state is described.

When the user rotates the operating shaft 20 from the state shown in FIG. 3B to the counterclockwise direction of FIG. 3B, the rotating shaft 160 will rotate together with the operating shaft 20 in the counterclockwise direction of FIG. 3B. In this way, based on the engagement between the engagement portion 162 of the rotating shaft 160 and the cam side engagement portion 144 of the cam 140a, the cam 140a rotates by a predetermined angle in the clockwise direction of FIG. 3B with the pivot 143 as the center.

Along with the rotation of the cam 140a, the spring member 150a is elastically deformed from the second state shown in FIG. 3B to the first state shown in FIG. 3A, while turning the rotating member 130a in the counterclockwise direction of FIG. 3B around the pivot 143 Spin.

Then, as shown in FIG. 3A, the movable armature 131c of the rotating member 130a is separated from the fixed side armature 122 of the switching terminal 120c at one end. In this state, the pair of switching terminals 120c and 120d are in the power OFF state shown in FIG. 3A in which the terminals 120c and 120d are not connected to each other. In the power-off state, the middle portion of the spring member 150a overlaps the rotation member 130a in the height direction through the entire length of the gap.

In addition, when the spring member 150a rotates the rotating member 130a in the counterclockwise direction of FIG. 3B along with the rotation of the cam 140a, the spring member 150a is in the second state shown in FIG. 3B in which the amount of deformation is large (in other words, the curvature is large), The state transitions to the first state shown in FIG. 3A where the amount of deformation is small (in other words, the curvature is small). At this time, the middle portion of the spring member 150a is displaced toward the inner side of the spring body 151 in the radial direction.

In addition, when the above-mentioned state transitions, the intermediate portion of the spring member 150a is displaced while being abutted with the supporting surface 110 of the restricting member 109. At this time, although the middle portion of the spring member 150a is displaced in a direction closer to the substrate 100a, it will not be displaced to the side closer to the substrate 100a than one side surface of the rotating member 130a.

[5 Notes]

In an example of the embodiment, the pivot shaft 143 is provided as an independent body from the substrate 100a. However, a pivot portion (not shown) corresponding to the pivot 143 may be provided integrally with the substrate 100a. At this time, the cam 140a and the rotating member 130a are supported in a rotatable state at the above-mentioned pivot portion. In addition, in an example of the embodiment, both the axis that becomes the rotation center of the cam 140 a and the axis that becomes the rotation center of the rotating member 130 a are constituted by the pivot 143. However, the shaft which becomes the rotation center of the cam 140a and the shaft which becomes the rotation center of the rotating member 130a may be comprised by another shaft.

[6 Regarding the role of an example in the implementation form. effect〕

According to the switch device 10a of the present embodiment having the above structure, it is possible to prevent the spring member 150a from being displaced to a position closer to the substrate 100a than one side surface of the rotating member 130a while ensuring the durability of the rotating member 130a.

That is, in the case of the present embodiment, when the switching device 10a transitions from the power OFF state to the power ON state, the restricting member 109 supporting the middle portion of the substrate member 150a from the side of the substrate 100a is provided on the substrate 100 and installed In the non-rotating member 130a. Therefore, when the above-mentioned state transitions, the contact area between the spring member 150a and the rotating member 130a can be reduced. As a result, you can To reduce the abrasion between the spring member 150a and the rotating member 130a during the state transition described above, in an attempt to improve the durability of the rotating member 130a.

Furthermore, among the side surfaces on one side of the substrate body 101, when the power is turned on as shown in FIG. 3B, a portion overlapping the middle portion of the spring member 15 in the height direction is provided with a supporting surface 110 of the restricting member 109. As the aforementioned state transition progresses, the middle portion of the spring member 150a is displaced (in other words, elastically deformed) as it is abutted with the support surface 110 so as to be farther away from the substrate body 101. Therefore, through the support surface 110 of the restricting member 109, the intermediate portion of the restricting spring member 150a is displaced to a position closer to the substrate 100a than one side surface of the rotating member 130a when the above-mentioned state transitions. As a result, it becomes difficult to act on the first lock portion 152 of the spring member 150a with a force in the direction of disengaging from the movable side lock portion 134 of the rotating member 130a, and it is difficult to release the first lock portion 152 of the spring member 150a from the movable side of the rotating member 130a. Locking of the side locking portion 134.

In addition, there is no need to provide another detachment prevention structure in this embodiment, so as to prevent the first locking portion 152 of the spring member 150a from detaching from the movable side locking portion 134 of the rotating member 130a. As a result, since the number of parts can be reduced, it is possible to reduce manufacturing costs.

In addition, as the aforementioned restricting member 109 is formed integrally with the substrate 100a through injection molding, the number of parts does not increase.

In addition, in this embodiment, when the switching device 10a transitions from the power OFF state to the power ON state, the middle portion of the spring member 150a is based on the abutment with the support surface 110 of the restricting member 109. The more the state transition is performed, the more Displacement away from the rotating member 130a. Therefore, it is possible to prevent interference between the spring member 150a and the rotating member 130a when the above-mentioned state transitions. As a result, it is possible to prevent the abrasion of the spring member 150a and the rotating member 130a, and improve the durability of the switch device 10a, and at the same time improve the operating feeling given to the user.

Industrial availability

The switch device for a variable resistor of the present invention can be suitably used as a switch device of a variable resistor of various structures.

1: With switch variable resistor

10a: Switching device

100a: substrate

101: Substrate body

102: side wall element

103: Through hole

106: Avoid the recess

107: Guide recess

108: Armature Configuration Department

109: Restriction member

110: support surface

111: gap

120c, 120d: terminal for switch

121a, 121b: tip

122: fixed side armature

130a: Rotating member

131c: movable armature

132: Shaft through hole

134: movable side locking part

135: movable side guide piece

138: The second expansion part

140a: cam

141: Cam body

142: Cam side shaft support

143: Pivot

144: Cam side joint

145: Cam side locking part

150a: Spring member

152: The first locking part

160: rotation axis

153: The second locking part

Claims (3)

A switch device for a variable resistor is provided with: a substrate; a pair of switching terminals supported by the substrate; a cam rotatably arranged on the substrate; and a rotating member arranged on the substrate. The connection state of the pair of switching terminals is switched by the rotation of the cam; the spring member, one end is locked to the rotating member and the other end is locked to the cam, and the rotating member is rotated in response to the rotation of the cam; and The restriction member is provided on the substrate, and restricts the displacement of the spring member in the direction approaching the substrate. For example, the variable resistor switch device of the first item of the scope of patent application, wherein the spring member has a part that is not supported by other members on both sides of the part supported by the restricting member when restricted. For example, the variable resistor switch device of the first item of the scope of patent application, wherein when the cam rotates, the rotating member rotates by pushing the part that locks the spring member by one end of the spring member, and interacts with the spring member. The abutting part of the restricting member is in the shape of an arc. When the cam rotates, it moves on the restricting member on the outer side of the radial direction of the spring member. The higher the height.

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