CN112424896A - Switch and operating device - Google Patents
Switch and operating device Download PDFInfo
- Publication number
- CN112424896A CN112424896A CN201980046409.8A CN201980046409A CN112424896A CN 112424896 A CN112424896 A CN 112424896A CN 201980046409 A CN201980046409 A CN 201980046409A CN 112424896 A CN112424896 A CN 112424896A
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- China
- Prior art keywords
- movable contact
- pressing
- contact
- switch
- contact piece
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- Pending
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
- H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
Abstract
The invention provides a switch and an operating device with excellent silencing effect. A switch (2) is provided with: a fixed contact (25); a movable contact piece (26) having flexibility, one end side being a swing fulcrum (260), and the other end side being a movable contact (261); and a pressing member (21) between a swing fulcrum (260) for pressing the movable contact piece (26) by external pressing and the movable contact (261), wherein the movable contact piece (26) is pressed by the pressing member (21) to swing, and the movable contact (261) is in contact with the fixed contact (25). The switch (2) is provided with: a contact point buffer member (28) disposed in contact with the movable contact piece (26); and a cushion member (29) for the biasing portion, which is disposed so as to abut against the biasing portion (262) formed on the movable contact piece (26), wherein the biasing portion (262) generates a reaction force against the pressing of the pressing member (21).
Description
Technical Field
The present invention relates to a switch and an operation device using the same, the switch including: a fixed contact; a movable contact piece having a movable contact point; and a pressing member for pressing the movable contact piece by receiving a pressing force from the outside, wherein the movable contact is brought into contact with the fixed contact by the pressing of the pressing member.
Background
Switches used in devices such as electronic devices have become popular. For example, patent document 1 discloses a switch having both characteristics of a slide switch and a snap switch, in which an inner actuator is pressed by pressing an operation button, and a movable contact is brought into contact with a normally open contact. Since the switch disclosed in patent document 1 has a structure in which the movable contact and the normally open contact are in sliding contact with each other, no impact noise is generated, and the quietness is improved.
Documents of the prior art
Patent document
Patent document 1: japanese unexamined patent application publication No. 2008-210654
As disclosed in patent document 1, a switch having excellent noise silencing performance is required, and in addition to the configuration disclosed in patent document 1, a switch having a configuration having excellent noise silencing effect is also required.
Disclosure of Invention
The present invention has been made in view of such circumstances, and an object thereof is to provide a switch that suppresses the generation of sound by including a buffer member disposed so as to be in contact with a movable contact piece that has flexibility, and one end side of which serves as a swing fulcrum and the other end side of which serves as a movable contact.
Another object of the present invention is to provide an operating device using such a switch.
In order to solve the above problem, a switch according to the present invention includes: a fixed contact; a movable contact piece having flexibility, one end side serving as a swing fulcrum and the other end side serving as a movable contact; and a pressing member that receives external pressure to press between a swing fulcrum of the movable contact piece and a movable contact, the movable contact piece being pressed by the pressing member to swing, and the movable contact being in contact with the fixed contact, wherein the switch includes a buffer member disposed in contact with the movable contact piece.
In the switch, the movable contact piece is provided with a biasing portion for generating a reaction force against the pressing of the pressing member between a contact portion for receiving the pressing of the pressing member and the movable contact, and the buffer member is a buffer member for the biasing portion disposed so as to be in contact with the biasing portion formed in the movable contact piece.
In the switch, the movable contact piece is configured to be deflected by being pressed by the pressing member and to be brought into contact with the fixed contact by being swung with a locking portion, as a swing shaft, that locks the biasing portion, by being further pressed.
In the switch, the contact point buffer member is disposed so as to be in contact with the other end side of the movable contact piece when the pressing member is not pressed from the outside.
In the switch, the movable contact of the movable contact piece is formed in an elastic shape at the other end portion.
In the switch, the pressing member is configured to press the movable contact piece by contacting the movable contact piece at a plurality of contact points.
Further, an operation device according to the present invention includes: a press-down operation unit for receiving a press-down operation from the outside; the switch transmits the pressing operation received by the pressing operation unit as an external pressing operation, and outputs a signal based on the operation of the movable contact provided in the switch.
In the switch and the operating device according to the present invention, the buffer member is disposed to be in contact with the movable contact piece having flexibility and having one end side serving as a swing fulcrum and the other end side serving as the movable contact, whereby the buffer member mitigates an impact caused by an operation of the movable contact piece.
Effects of the invention
The switch and the operating device of the present invention are provided with a flexible buffer member that contacts a movable contact piece having one end serving as a swing fulcrum and the other end serving as a movable contact. Thus, the buffer member alleviates the impact caused by the operation of the movable contact piece, and therefore, the buffer member exhibits an excellent effect of suppressing the generation of sound.
Drawings
Fig. 1 is a schematic perspective view showing an example of an external appearance of an operation device according to the present invention.
Fig. 2 is a schematic perspective view showing an example of an external appearance of the switch according to the present invention.
Fig. 3 is a schematic exploded perspective view showing an example of the switch according to the present invention.
Fig. 4 is a schematic cross-sectional view showing an example of a cross section of the switch according to the present invention.
Fig. 5A is a schematic external view showing an example of a pressing member provided in the switch according to the present invention.
Fig. 5B is a schematic external view showing an example of a pressing member provided in the switch according to the present invention.
Fig. 6A is a schematic external view showing an example of a movable contact piece provided in the switch according to the present invention.
Fig. 6B is a schematic external view showing an example of a movable contact piece provided in the switch according to the present invention.
Fig. 7A is a schematic perspective view showing an example of a buffer member provided in the switch according to the present invention.
Fig. 7B is a schematic perspective view showing an example of a buffer member provided in the switch according to the present invention.
Fig. 8 is a schematic cross-sectional view showing an example of the operation of the switch according to the present invention.
Fig. 9 is a schematic cross-sectional view showing an example of the operation of the switch according to the present invention.
Fig. 10 is a schematic cross-sectional view showing an example of the operation of the switch according to the present invention.
Fig. 11 is a schematic cross-sectional view showing an example of the operation of the switch according to the present invention.
Fig. 12A is an explanatory diagram schematically showing an example of a mechanical system model relating to a pressing member and a movable contact piece provided in a switch according to the present invention.
Fig. 12B is an explanatory diagram schematically showing an example of a mechanical system model relating to a pressing member and a movable contact piece provided in a conventional switch.
Fig. 13 is an explanatory diagram schematically showing an example of a mechanical system model of a conventional switch.
Fig. 14A is an explanatory diagram schematically showing an example of a mechanical system model of a conventional switch.
Fig. 14B is an explanatory diagram schematically showing an example of a mechanical system model of a conventional switch.
Fig. 15 is a graph schematically showing a relationship between a pressing amount and an operation load of a conventional switch as a mechanical system model.
Fig. 16 is an explanatory diagram schematically showing an example of a mechanical system model of the switch according to the present invention.
Fig. 17 is a graph schematically showing an example of the relationship between the amount of pressing of the switch and the operation load according to the present invention as a mechanical system model.
Fig. 18A is a schematic external view showing an example of a pressing member provided in the switch according to the present invention.
Fig. 18B is a schematic external view showing an example of a pressing member provided in the switch according to the present invention.
Detailed Description
(application example)
The operation device according to the present invention is used as an operation device such as a mouse used for operating a personal computer (hereinafter, referred to as a personal computer). The switch according to the present invention is used as a micro switch in various electronic devices including an operating device. Hereinafter, the operation device 1 and the switch 2 illustrated in the drawings will be described with reference to the drawings.
(operation device 1)
First, the operation device 1 will be explained. Fig. 1 is a schematic perspective view showing an example of an external appearance of an operation device 1 according to the present invention. Fig. 1 shows an example in which the operation device 1 according to the present invention is applied to a mouse for operating an electronic device such as a personal computer. The operation device 1 includes: a push-down operation unit 10 such as a mouse button for receiving a push-down operation by an operator's finger, and a rotation operation unit 11 such as a mouse wheel for receiving a rotation operation by an operator's finger. The swing operation portion 11 receives not only a swing operation but also a pressing operation, and functions as the pressing operation portion 10. Further, a signal line 12 for outputting an electric signal to an external device such as a personal computer is connected to the operation device 1. The operation device 1 is not limited to wired communication using the signal line 12, and may output an electric signal by various communication methods such as wireless communication.
In the operation device 1, switches 2 described later are housed in the push operation portion 10 and the pivot operation portion 11, respectively, and when the push operation portion 10 is pushed down, a portion inside the push operation portion 10 pushes the corresponding switch 2. The switch 2 outputs a signal based on the pressing state from the signal line 12 to an electronic device such as an external computer.
That is, the operation device 1 according to the present invention includes a push operation unit 10 that receives a push operation from the outside, a rotation operation unit 11 that receives an operation such as a rotation operation, and further includes a switch 2 therein. Then, the operation device 1 transmits the pressing operation received by the pressing operation unit 10 and/or the rotation operation unit 11 to the switch 2 as a pressing operation from the outside, and outputs a signal based on the operation of the switch 2 to an external electronic device.
(switch 2)
Next, the switch 2 according to the present invention will be described. Fig. 2 is a schematic perspective view showing an example of an external appearance of the switch 2 according to the present invention. In the present specification, the direction of the switch 2 is represented by the left front side being front, the right inner side being rear, the upper side being upper, the lower side being lower, the left inner side being left, and the right front side being right in fig. 2, and this is for convenience of description, and the assembly direction of the switch 2 is not limited. As described above, the switch 2 is housed as a micro switch inside the electronic device such as the operation device 1, and the pressing operation received by the pressing operation portion 10 or the like of the operation device 1 is received as a pressing operation from the outside.
The switch 2 includes a substantially rectangular parallelepiped case 20. The housing 20 is formed of a lower base 20a and an upper cover 20 b. A rectangular insertion hole 200 through which the pressing member 21 is inserted is formed in the upper surface of the housing 20 at a position to the left from the center in front view. The pressing member 21 inserted through the insertion hole 200 is a member that moves up and down by receiving a pressure from the outside of the housing 20, and the upper end of the pressing member 21 protrudes from the upper surface of the housing 20. Further, 3 connection terminal portions 22 protrude from the lower side of the housing 20, and the connection terminal portions 22 are metal pieces to which other electrical components can be connected.
In the switch 2 formed in this manner, the external pressing operation received by the operation device 1 is transmitted to the pressing member 21 as the external pressing operation from the housing 20. The pressing member 21 moves downward when receiving an external pressure, and moves upward when releasing the external pressure.
Next, the internal structure of the switch 2 will be explained. Fig. 3 is a schematic exploded perspective view showing an example of the switch 2 according to the present invention. Fig. 4 is a schematic cross-sectional view showing an example of a cross section of the switch 2 according to the present invention. Fig. 4 shows a cross section taken on a vertical plane including the line a-B shown in fig. 2 in the direction of arrows.
In the case 20 of the switch 2, a region serving as a contact chamber for housing a contact mechanism of the open/close circuit is secured. An insertion hole 200 penetrating from the outside of the housing 20 is opened in the upper surface of the contact chamber, and a pressing member 21 is inserted into the insertion hole 200.
A contact mechanism housed in the contact chamber will be described. In the contact chamber, members such as a common contact terminal 23, a first contact terminal 24, a second contact terminal 25, and a movable contact piece 26 are arranged as a contact mechanism. The common contact terminal 23 is disposed on the left side in the contact chamber and electrically connected to the left connection terminal portion 22. The first contact terminal 24 is disposed on the upper right side in the contact chamber and electrically connected to the right connection terminal portion 22. The second contact terminal 25 is disposed on the lower right side in the contact chamber and electrically connected to the central connection terminal portion 22.
The movable contact piece 26 is a plate-shaped conductive metal member extending in the left-right direction in the contact chamber. The left end side of the movable contact piece 26 is a fixed end that is locked to the common contact terminal 23 and functions as a swing fulcrum 260. The right end side of the movable contact piece 26 is a free end moving between the first contact terminal 24 and the second contact terminal 25, and is a movable contact 261. Further, the movable contact piece 26 is formed with an urging portion 262, the urging portion 262 functions as a return spring whose center is punched out and bent in an arc shape, and the tip of the urging portion 262 is locked to a locking plate 27 formed near the center in the contact chamber. The urging portion 262 generates a reaction force against the pressing of the pressing member 21.
A contact cushioning member 28 formed using an elastic material is disposed above the first contact terminal 24. The contact cushioning member 28 contacts the first contact terminal 24 from above. Further, a cushion member 29 for urging portion formed of an elastic material is disposed below the urging portion 262 of the movable contact piece 26. The urging portion buffer member 29 contacts the urging portion 262 from below.
In the contact mechanism configured as described above, the pressing member 21 is moved downward by receiving a pressure from the outside, and presses the movable contact piece 26. By pressing down the movable contact piece 26, the right end side, which is the free end of the movable contact piece 26, is lowered, and the movable contact 261 comes into contact with the second contact terminal 25. Thereby, the connection terminal portion 22 connected to the left side of the common contact terminal 23 and the connection terminal portion 22 connected to the center of the second contact terminal 25 are brought into a conductive state.
When the pressing of the pressing member 21 is released, the movable contact piece 26 is biased upward by the reaction force of the biasing portion 262. The pressing member 21 moves upward as the movable contact piece 26 is biased upward. The movable contact piece 26 is biased upward by the biasing portion 262, and the movable contact 261 located on the right end side of the movable contact piece 26 rises and comes into contact with the contact cushioning member 28. When the movable contact 261 of the movable contact 26 rises, the movable contact 261 may contact the first contact terminal 24 covered with the contact cushioning member 28. In this case, the movable contact piece 26 indirectly contacts the contact point cushioning member 28.
The shapes of the pressing member 21, the movable contact piece 26, the contact point cushioning member 28, and the biasing portion cushioning member 29 will be described further. Fig. 5A and 5B are schematic external views showing an example of the pressing member 21 provided in the switch 2 according to the present invention. Fig. 5A is a schematic front view, and fig. 5B is a schematic perspective view from an oblique lower viewpoint. The pressing member 21 includes a pressed projection 210 on the upper side and a pressing plate 211 on the lower side. The pressed projection 210 of the pressing member 21 has a substantially rectangular parallelepiped shape, and the upper end thereof is formed into a curved surface in a semicircular shape in front view. The upper portion of the pressed projection 210 protrudes from the insertion hole 200 of the housing 20 and receives external pressure. The pressing plate 211 has a substantially rectangular shape in plan view, and a lower surface facing the movable contact piece 26 is formed in a substantially planar shape. The left end of the lower surface of the pressing plate 211 is formed in a tapered shape inclined upward, and a first ridge line 211a as a boundary between the flat portion and the tapered portion extends linearly in the front-rear direction. In the second ridge line 211b on the right end side of the lower surface of the pressing plate 211, a portion that contacts the movable contact piece 26 is a portion that protrudes slightly rightward of the front end and the rear end. The pressing member 21 is in contact with the movable contact piece 26 at a plurality of positions including at least the first ridge line 211a and the second ridge line 211b in the process of pressing the movable contact piece 26.
Fig. 6A and 6B are schematic external views showing an example of the movable contact piece 26 provided in the switch 2 according to the present invention. Fig. 6A is a schematic plan view, and fig. 6B is a schematic perspective view from an oblique lower viewpoint. The movable contact piece 26 is a flexible member formed of a thin metal plate. The movable contact piece 26 has a substantially rectangular shape in plan view, and a right end side which becomes a free end is formed as a movable contact 261, and a contact protrusion 261a is provided to protrude from a lower surface side of the movable contact 261. The contact protrusion 261a is provided with a punched elastic piece 261b protruding so as to extend from the right end to the left side. The elastic piece 261b has a substantially rectangular shape, and the right side is connected to the left end of the movable contact piece 26 and swings about a continuous portion as a fulcrum, so that it has an elastic shape. The urging portion 262 is formed on the left side of the elastic piece 261 b. The biasing portion 262 is formed in an arc shape in which a portion punched out so as to extend in a band shape from the right side to the left side is bent in a downwardly convex shape, and functions as a return spring. The biasing portion 262 has a locking portion 262a at its tip, the locking portion 262a is locked to a locking plate 27 attached to a base 20a of the housing 20, and the biasing portion 262 pivots a locking portion 262a locked to the locking plate 27 as a pivot shaft toward the right movable contact 261.
Fig. 7A and 7B are schematic perspective views showing an example of a buffer member provided in the switch 2 according to the present invention. Fig. 7A shows the contact damping member 28. The contact cushioning member 28 is a member molded from an elastic material such as urethane rubber, and is formed by combining the upper member 280 and the lower member 281. The upper member 280 has a substantially rectangular parallelepiped shape, and a right end side contacting the inner wall surface of the housing 20 extends downward and is fixed. A notch for fitting the first contact terminal 24 is formed at the fixed portion. A lower member 281 having a U-shape in plan view is attached to the lower surface of the left end side of the upper member 280. The contact cushioning member 28 formed by the upper member 280 and the lower member 281 covers the first contact terminal 24, and the movable contact 261 serving as the free end of the movable contact piece 26 is indirectly or directly in contact with the lower member 281 of the contact cushioning member 28 via the first contact terminal 24.
Fig. 7B shows the urging portion cushioning member 29. The urging portion cushioning member 29 is a member molded from an elastic material such as urethane rubber, and has a shape in which a substantially rectangular table portion 291 is formed on the lower surface of a plate-like body 290 having a substantially rectangular shape in a plan view, and a notch is formed on the back side of the plate-like body 290 so as to fit the second contact terminal 25. The upper surface of the plate-like body 290 on the left end side abuts against the lower surface of the biasing portion 262. Since the land 291 is formed on the right side of the plate-like body 290, the left end of the plate-like body 290 is subjected to the swing of the biasing portion 262, and is deflected as indicated by an arrow in the figure, thereby absorbing the impact.
(operation of switch 2)
The operation of the switch 2 of the present invention configured as described above will be described. Fig. 8 to 11 are schematic cross-sectional views showing an example of the operation of the switch 2 according to the present invention. Fig. 8 to 11 show cross sections taken on a vertical plane including the line a-B shown in fig. 2 from a front view point.
Fig. 8 shows a state where the pressing member 21 does not receive a pressing force from the outside. The lower end of the pressing member 21 contacts the movable contact piece 26 at the lower surface of the lower pressing plate 211 with respect to a portion between the swing fulcrum 260 at which the left end of the movable contact piece 26 is locked and the position at which the locking portion 262a at the tip of the biasing portion 262 of the movable contact piece 26 is locked. In the state shown in fig. 8, the movable contact piece 26 is pressed upward against the reaction force of the pressing member 21 by the biasing portion 262 located between the contact portion pressed by the pressing member 21 and the movable contact 261, and therefore, the free end side of the movable contact 261 is brought into contact with the contact-use buffer member 28 disposed on the upper right side in the contact chamber.
Fig. 9 shows a state in which the pressing member 21 is moved downward by receiving an external pressure from the state shown in fig. 8. The pressing member 21 moves downward, and the pressing plate 211 located below the pressing member 21 presses the movable contact piece 26 downward. The pressing member 21 contacts the movable contact piece 26 at two points of the first ridge line 211a and the second ridge line 211b of the pressing plate 211 with respect to the movable contact piece 26. The movable contact piece 26 is pressed by the pressing member 21 as a whole, and moves downward with the swing fulcrum 260 as a swing axis. However, since the movable contact piece 26 is pressed upward by the reaction force against the pressing of the pressing member 21 by the urging portion 262 located between the contact portion receiving the pressing of the pressing member 21 and the movable contact 261, the movable contact 261 maintains a state of being in contact with the contact cushioning member 28 disposed on the upper right side in the contact chamber. Therefore, the movable contact piece 26 is pressed by the pressing member 21, bent downward, and bent.
Fig. 10 shows a state in which the pressing member 21 is moved downward by receiving further pressing from the outside from the state shown in fig. 9. Since the pressing member 21 further moves downward, the entire movable contact piece 26 is pressed by the pressing member 21 and moves downward with the swing fulcrum 260 as a swing axis. Since the biasing portion 262 of the movable contact piece 26 swings downward with the locking portion 262a locked to the locking plate 27 as a swing axis, the entire movable contact piece 26 swings in reverse rotation with the swing fulcrum 260 as a swing axis. Therefore, the contact protrusion 261a of the movable contact 261 contacts the second contact terminal 25, and the second contact terminal 25 is disposed at the lower right side in the contact chamber as a fixed contact. Thereby, the connection terminal portion 22 connected to the left side of the common contact terminal 23 and the connection terminal portion 22 connected to the center of the second contact terminal 25 are brought into a conductive state.
The contact protrusion 261a of the movable contact 261 collides with the second contact terminal 25 with a tendency of the movable contact piece 26 to reverse, and therefore is accompanied by an impact. However, since the left end side of the plate-like body 290 of the urging portion cushioning member 29 into which the second contact terminal 25 is fitted is deflected as indicated by an arrow in fig. 7B, an impact when the movable contact 261 of the movable contact piece 26 collides with the second contact terminal 25 and an impact generated when the urging portion 262 swings are absorbed. Further, by relaxing the impact when the movable contact 261 of the movable contact piece 26 collides with the second contact terminal 25, the generation of sound due to the collision is suppressed. Further, since the contact protrusion 261a of the movable contact 261 is formed on the elastic piece 261b having an elastic shape, the impact with the second contact terminal 25 is relaxed, and the sound generated at this time is suppressed.
Fig. 11 shows a state in which the pressing member 21 moves to the lowermost point of the movable region by receiving further pressing from the outside from the state shown in fig. 10. Since the pressing member 21 moves to the lowermost point, the entire movable contact piece 26 is pressed by the pressing member 21 and moves downward about the pivot 260 as the pivot axis. Therefore, the movable contact piece 26 is supported by the swing fulcrum 260 and the movable contact point 261 at both ends and is bent downward. However, the on state is not changed.
When the pressing of the pressing member 21 is released, the movable contact piece 26 is biased upward by the reaction force of the biasing portion 262. The pressing member 21 moves upward as the movable contact piece 26 is biased upward. Further, the movable contact piece 26 is biased upward by the biasing portion 262, and thereby the movable contact 261, which is a free end of the movable contact piece 26, rises and comes into contact with the contact cushioning member 28. That is, the state shown in fig. 8 is obtained. When the pressing of the pressing member 21 is released and the movable contact piece 26 rises, it collides with the contact point cushioning member 28. The impact caused by the collision is absorbed by the contact cushioning member 28. Further, even when the movable contact piece 26 is designed to collide with the first contact terminal 24 covered with the contact cushioning member 28, the impact caused by the collision of the movable contact piece 26 is absorbed by the contact cushioning member 28. That is, since the movable contact member 26 is in contact with the contact cushioning member 28 directly or indirectly via the first contact terminal 24, the contact cushioning member 28 cushions the impact at the time of collision and suppresses the generation of sound due to collision.
As described above, the switch 2 according to the present invention exhibits excellent effects such as a silencing effect of alleviating the impact at the time of collision of various members and suppressing the generation of collision sound by the elastic shape of the contact cushioning member 28, the urging portion cushioning member 29, and the elastic piece 261b provided to protrude from the contact of the movable contact 261.
Next, a silencing effect based on the shape of the pressing member 21 provided in the switch 2 according to the present invention will be described. Fig. 12A is an explanatory diagram schematically showing an example of a mechanical system model relating to the pressing member 21 and the movable contact piece 26 of the switch 2 according to the present invention. Fig. 12B is a diagram for comparison, and is an explanatory diagram schematically showing an example of a mechanical system model relating to the pressing member 21x and the movable contact piece 26x included in the conventional switch 2 x. Fig. 12A and 12B show the pressing members 21, 21x and the movable contact pieces 26, 26x from the front view point. In fig. 12A and 12B, the dashed dotted line indicates the center of the force pressing the movable contact pieces 26, 26x upon receiving the external pressure, and the arrow indicates the force applied by the pressing members 21, 21x to the movable contact pieces 26, 26 x.
As shown in fig. 12A, the lower surface of the pressing plate 211 formed at the lower portion of the pressing member 21 of the switch 2 according to the present invention is formed in a substantially planar shape. Since the movable contact piece 26 is pressed by the pressing member 21 to be bent and bent downward, the pressing member 21 contacts the movable contact piece 26 at two contact portions of the first ridge line 211a and the second ridge line 211 b. That is, the pressing member 21 has, as contact portions, a first ridge line 211a side which is closer to the swing fulcrum 260 and a second ridge line 211b side which is closer to the movable contact 261 with respect to the center of the force which presses the movable contact piece 26 by receiving the external pressure. Then, as shown by arrows in the figure, the pressing member 21 presses the movable contact piece 26 at two contact points. In the conventional switch 2x for comparison shown in fig. 12B, the lower portion of the pressing member 21x is formed in a downwardly convex arc shape, and the pressing member 21x contacts the movable contact piece 26x at 1 contact point substantially coincident with the center of the pressing force, and presses the movable contact piece 26x at 1 contact point as indicated by an arrow in the figure.
Fig. 13, 14A, and 14B are explanatory diagrams schematically showing an example of a mechanical system model of a conventional switch 2 x. Fig. 13 is an explanatory diagram schematically showing the relationship between the load and the movable contact piece 26x as a mechanical system model. Fig. 14A and 14B are graphs schematically showing a relationship between the pressing amount and the operation load of the conventional switch 2x as a mechanical system model. Fig. 13 shows a cross section of the switch 2x cut on a vertical plane from a front view point, and intermittently shows the movement of the movable contact piece 26 x. Since fig. 13 shows a conventional switch 2x, the contact cushioning member 28x and the biasing portion cushioning member 29x are not shown. Fig. 14A schematically shows a relationship between a load and a deflection applied to the support beams at both ends, and fig. 14B schematically shows a timing of the reversing operation. Fig. 15 shows a relationship in which the horizontal axis represents the pressing amount (operation stroke) of the pressing member 21x when the pressing member 21x of the switch 2x presses downward, and the vertical axis represents the operation load received by the pressing member 21x when pressing.
As shown in fig. 13, since the lower surface of the pressing member 21x is formed in an arc shape, the contact portion contacts the movable contact piece 26x at 1 point in the pressing process. In fig. 13 and fig. 14A and 14B, a white arrow with a broken line indicates a pressing force when the pressing member 21x comes into contact with the movable contact piece 26x at the position a shown in fig. 13. In fig. 15, the broken line indicates the relationship between the pressing amount and the operation load when the pressing member 21x and the movable contact piece 26x are in contact at the position a shown in fig. 13. The solid white arrows shown in fig. 13, 14A, and 14B and the solid line shown in fig. 15 indicate the pressing force and the relationship when the pressing member 21x is brought into contact with the movable contact piece 26x at the position B on the rocking fulcrum 260x side (toward the left side in the drawing) with respect to the position a. White arrows of the chain lines shown in fig. 13, 14A, and 14B and the chain line shown in fig. 15 indicate the pressing force and the relationship when the pressing member 21x is brought into contact with the movable contact piece 26x at the position C on the movable contact point 261x side (toward the right side in the drawing) with respect to the position a.
Fig. 14A shows a relationship between the pressing force of the movable contact piece 26x and the movable contact piece 26x, assuming that support beams are provided at both ends. In the case of the support beam at both ends, the force required to produce the same deflection is maximum at the position B near the swing fulcrum 260x and then decreases in the order of the position a and the position C. Fig. 14B shows that the timing of the reverse operation is slowest at position B near the pivot point 260x, and then becomes faster at position a and position C in this order. From these relationships, the graph shown in fig. 15 can be obtained. In fig. 15, the point at which the operation load drops sharply is the position at which the movable contact piece 26x is reversed. As shown in fig. 15, in the reverse position, the load increases in the order of approaching the swing fulcrum 260x, and the timing of the reverse operation with respect to the pressing amount becomes slow. In addition, a loud sound is generated during the reverse operation.
Fig. 16 is an explanatory diagram schematically showing an example of a mechanical system model of the switch 2 according to the present invention, and fig. 17 is a graph schematically showing an example of a relationship between a pressing amount of the switch 2 and an operation load according to the present invention as the mechanical system model. Note that, in fig. 16, the description of the contact point cushioning member 28 and the urging portion cushioning member 29 is omitted for the sake of understanding the movement of the movable contact piece 26. The following describes the silencing effect of these buffer members, in addition to the silencing effect. As shown in fig. 16, since the lower surface of the pressing member 21 of the switch 2 according to the present invention is formed in a planar shape, the movable contact piece 26 comes into contact with two contact portions during the pressing process. In fig. 16, white arrows indicated by broken lines, solid lines, and chain lines are used for comparison and indicate pressing forces when the movable contact piece 26 is in contact with positions corresponding to the position a, the position B, and the position C shown in fig. 13. In fig. 17, a thick line indicates a relationship between the pressing amount and the operation load of the switch 2 according to the present invention, and a broken line, a solid line, and a chain line are used for comparison to indicate a comparison between the pressing amounts and the operation loads at the positions a, B, and C.
In the switch 2 according to the present invention, the pressing member 21 receives an external pressure, and contacts the movable contact piece 26 with the first ridge line 211a and the second ridge line 211b to press the movable contact piece 26. The movable contact piece 26 pressed by the pressing member 21 maintains a state of contact with the first ridge line 211a and the second ridge line 211b while being deflected, but the reaction force with respect to the first ridge line 211a and the second ridge line 211b and the ratio thereof change with a change in the amount of pressing. Therefore, the relationship between the pressing amount and the operation load does not change as rapidly as when pressing the contact portion at the position a, the position B, and the position C at 1, but changes as a thick line shown in fig. 17. That is, when the movable contact piece 26 is reversed, the switching time from the state of contact with the first contact terminal 24 to the collision with the second contact terminal 25 becomes long, and the speed at which the contact protrusion 261a of the movable contact 261 collides with the second contact terminal 25 becomes slow. By reducing the collision speed of the contact protrusion 261a, a silencing effect can be obtained in which the impact at the time of collision is reduced, and the sound generated by the collision of the contact protrusion 261a, that is, the so-called sound, is reduced.
As described above, in the switch 2 according to the present invention, the pressing member 21 is in contact with the movable contact piece 26 at a plurality of positions, and thus, compared with the case where the pressing member 1 is in contact with the movable contact piece 26, the generation of sound can be suppressed.
The shape of the pressing member 21 is not limited to the above-described form, and can be deformed into various shapes as long as it comes into contact with the movable contact piece 26 at a plurality of positions during pressing. Fig. 18A and 18B are schematic external views showing an example of the pressing member 21 provided in the switch 2 according to the present invention. Fig. 18A is a schematic front view, and fig. 18B is a schematic perspective view from an oblique lower viewpoint. The pressing member 21 shown in fig. 18A and 18B has portions corresponding to the first ridge line 211a and the second ridge line 211B projecting downward to form a first contact projection 211c and a second contact projection 211 d. The pressing member 21 shown in fig. 18A and 18B presses the movable contact piece 26 by contacting the movable contact piece 26 with the first contact protrusion 211c and the second contact protrusion 211 d. Therefore, the switch 2 according to the present invention can provide a silencing effect even when used as the pressing member 21 shown in fig. 18A and 18B.
As described above in the embodiments, the switch 2 according to the present invention exhibits excellent effects such as suppression of generation of sound accompanying the operation of the movable contact piece 26 by the shape of various members such as the shape of the pressing member 21 and the shape of the movable contact point 261 of the movable contact piece 26, and the buffer members such as the contact buffer member 28 and the biasing section buffer member 29.
The present invention is not limited to the above-described embodiments, and can be extended to other various embodiments. Therefore, the above embodiments are merely illustrative in all aspects and are not to be construed as limiting. The technical scope of the present invention is explained in terms of the scope of the claims and is not restricted by the description. Further, all changes and modifications within the equivalent scope of the claimed scope are within the scope of the present invention.
For example, although the contact cushioning member 28 into which the first contact terminal 24 is fitted is illustrated in the above embodiment, the present invention is not limited to this, and can be extended to various embodiments in which only the cushioning member is formed without the first contact terminal 24.
In the above-described embodiment, the mouse is exemplified as the operation device 1 provided with the switch 2, but the present invention is not limited to this, and can be extended to various forms such as applying various devices such as a keyboard and various buttons for operation as the operation device 1.
Description of the symbols
1 operating device
2 switch
20 casing
21 pressing member
211 pressing plate
211a first ridge
211b second ridge
22 connecting terminal part
23 common contact terminal
24 first contact terminal
25 second contact terminal (fixed contact)
26 movable contact piece
260 swing fulcrum
261 movable contact
261a contact protrusion
261b elastic sheet
262 force application part
262a locking part
Buffer member for 28 contacts
29 buffer member for urging portion
Claims (7)
1. A switch is provided with:
a fixed contact;
a movable contact piece having flexibility, one end side serving as a swing fulcrum and the other end side serving as a movable contact;
a pressing member for pressing between the swing fulcrum of the movable contact piece and the movable contact upon receiving an external pressure,
the movable contact piece is pressed by the pressing member to swing, and the movable contact is contacted with the fixed contact,
the switch includes a buffer member disposed so as to be in contact with the movable contact piece.
2. The switch of claim 1,
a biasing portion for generating a reaction force against the pressing of the pressing member is formed between the movable contact and a contact portion of the movable contact piece that receives the pressing of the pressing member,
the buffer member is a buffer member for a biasing portion disposed so as to abut against a biasing portion formed on the movable contact piece.
3. The switch of claim 2,
the movable contact piece is formed to be deflected by being pressed by the pressing member and to be brought into contact with the fixed contact by being swung with the locking portion, as a swing shaft, that locks the urging portion, by being further pressed.
4. The switch according to any one of claims 1 to 3,
the contact device further includes a contact cushioning member disposed to be in contact with the other end side of the movable contact piece when the pressing member is not pressed from the outside.
5. The switch according to any one of claims 1 to 4,
the movable contact of the movable contact piece is formed in an elastic shape at the other end portion.
6. The switch according to any one of claims 1 to 5,
the pressing member is brought into contact with the movable contact piece at a plurality of contact points, thereby pressing the movable contact piece.
7. An operation device is characterized by comprising:
a press-down operation unit for receiving a press-down operation from the outside;
the switch according to any one of claims 1 to 6, wherein the pressing operation received by the pressing operation unit is transmitted as a pressing operation from the outside,
the operating device outputs a signal based on the operation of the movable contact provided in the switch.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-161810 | 2018-08-30 | ||
| JP2018161810A JP7077877B2 (en) | 2018-08-30 | 2018-08-30 | Switch and operating device |
| PCT/JP2019/030625 WO2020044963A1 (en) | 2018-08-30 | 2019-08-05 | Switch and operating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112424896A true CN112424896A (en) | 2021-02-26 |
Family
ID=69643056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980046409.8A Pending CN112424896A (en) | 2018-08-30 | 2019-08-05 | Switch and operating device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7077877B2 (en) |
| CN (1) | CN112424896A (en) |
| TW (1) | TWI691985B (en) |
| WO (1) | WO2020044963A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI795771B (en) * | 2020-06-02 | 2023-03-11 | 日商歐姆龍股份有限公司 | Switches and Operating Devices |
| JP2021190348A (en) * | 2020-06-02 | 2021-12-13 | オムロン株式会社 | Switch, switch assembly, key input device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820433U (en) * | 1981-07-31 | 1983-02-08 | アルプス電気株式会社 | push button switch |
| JPS62121725U (en) * | 1986-01-27 | 1987-08-01 | ||
| JP2007042359A (en) * | 2005-08-02 | 2007-02-15 | Hst Kk | Push-button switch |
| TWI356430B (en) | 2008-01-10 | 2012-01-11 | Primax Electronics Ltd | Micro switch |
| CN201199496Y (en) | 2008-04-22 | 2009-02-25 | 余正明 | Switch |
| CN101776959B (en) | 2009-01-12 | 2012-03-07 | 致伸科技股份有限公司 | Mute mouse |
| WO2017018097A1 (en) * | 2015-07-24 | 2017-02-02 | 信越ポリマー株式会社 | Push-button switch member |
| WO2017056601A1 (en) * | 2015-09-30 | 2017-04-06 | アルプス電気株式会社 | Push switch |
| CN108054040A (en) | 2017-12-08 | 2018-05-18 | 东莞市凯华电子有限公司 | A kind of mute microswitch |
| CN108281314A (en) | 2017-12-08 | 2018-07-13 | 东莞市凯华电子有限公司 | A kind of high life mute microswitch |
-
2018
- 2018-08-30 JP JP2018161810A patent/JP7077877B2/en active Active
-
2019
- 2019-07-29 TW TW108126787A patent/TWI691985B/en active
- 2019-08-05 WO PCT/JP2019/030625 patent/WO2020044963A1/en active Application Filing
- 2019-08-05 CN CN201980046409.8A patent/CN112424896A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP7077877B2 (en) | 2022-05-31 |
| JP2020035670A (en) | 2020-03-05 |
| TWI691985B (en) | 2020-04-21 |
| WO2020044963A1 (en) | 2020-03-05 |
| TW202009962A (en) | 2020-03-01 |
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