TWI691985B - Switch and operating device - Google Patents

Abstract

The invention provides a switch and an operating device with excellent mute effect. The switch 2 includes: a fixed contact 25; a movable contact piece 26 having flexibility, and one end side is a swing fulcrum 260, and the other end side is a movable contact 261; and a pressing member 21 is pressed against the movable contact by the outside The swing fulcrum 260 of the piece 26 and the movable contact 261 are pressed, and the movable contact piece 26 is pressed by the pressing member 21 to swing, and the movable contact 261 contacts the fixed contact 25. In addition, the switch 2 includes: a contact buffer member 28 arranged to contact the movable contact piece 26; and a buffer member 29 applied to the biasing portion arranged to contact the biasing portion 262. The portion 262 is formed on the movable contact piece 26 so as to generate a reaction force against the pressing of the pressing member 21.

Description

Switch and operating device

The present invention relates to a switch and an operating device using such a switch. The switch includes a fixed contact, a movable contact piece having a movable contact, and a pressing member that presses the movable contact piece when pressed from the outside, and When the pressing member presses, the movable contact comes into contact with the fixed contact.

Switches used in devices such as electronic equipment are spreading. For example, Patent Document 1 discloses a switch that has the characteristics of both a slide-type switch and a snap action-type switch. By pressing an operation button, the internal actuator is pressed to make The movable contact is in contact with the normally open contact. The switch disclosed in Patent Document 1 has a structure in which a movable contact is in sliding contact with a normally open contact, so no collision sound is generated, and the quietness is improved. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2008-210654

[Problems to be solved by the invention]

As disclosed in Patent Document 1, there is a demand for a switch with excellent muteness. In addition to the structure disclosed in Patent Document 1, a switch with a structure with excellent mute effect is also required.

The present invention is made in view of this situation, and an object of the present invention is to provide a switch that suppresses the generation of sound by including a buffer member that is arranged in abutment with a movable contact piece that has flexibility , And one end side is a swing fulcrum, and the other end side is a movable contact.

In addition, another object of the present invention is to provide an operation device using such a switch. [Means to solve the problem]

In order to solve the above-mentioned problems, the switch described in this application includes: fixed contacts; movable contact pieces with flexibility, and one end side is a swing fulcrum and the other end side is a movable contact; and the pressing member is exposed to Pressing to press between the swing fulcrum of the movable contact piece and the movable contact, and the movable contact piece is pressed by the pressing member to swing, and the movable contact is in contact with the fixed contact, the The switch is characterized by including a buffer member disposed so as to contact the movable contact piece.

In addition, the switch is characterized in that the movable contact piece is formed with an urging portion between a contact portion pressed by the pressing member and the movable contact, and the urging portion generates resistance against the pressing member The reaction force of the pressing, the cushioning member is a cushioning member for the urging portion arranged so as to contact the urging portion, and the urging portion is formed on the movable contact piece.

In addition, the switch is characterized in that the movable contact piece is formed so as to be flexed by being pressed by the pressing member, and the movable contact side is locked by a pressing force to lock the card of the urging portion The stopper swings for the swing shaft, thereby making contact with the fixed contact.

In addition, the switch is characterized by including a contact buffer member that contacts the other end side of the movable contact piece when the pressing member is not pressed from the outside Way configuration.

In addition, the switch is characterized in that the movable contact of the movable contact piece is formed in an elastic shape at the other end.

In addition, the switch is characterized in that the pressing member contacts the movable contact piece at a plurality of contact points and presses the movable contact piece.

Furthermore, the operation device described in the present application is characterized by comprising: a pressing operation section to receive a pressing operation from outside; and the switch to regard the pressing operation received by the pressing operation section as an external source Pressing is communicated, and the operation device outputs a signal based on the movement of the movable contact included in the switch.

The switch and the operating device described in this application are provided with a buffer member that abuts on the movable contact piece, and the cushion member reduces the impact based on the movement of the movable contact piece, which has flexibility and one end side is The swing fulcrum and the other end are movable contacts. [Effect of invention]

The switch and the operating device of the present invention are provided with a buffer member that abuts on a movable contact piece that has flexibility, and one end side is a swing fulcrum and the other end side is a movable contact. Thereby, the cushioning member relaxes the impact due to the movement of the movable contact piece, so that it is possible to suppress the generation of sound or the like and obtain an excellent effect.

<Application example> The operation device described in this application can be, for example, an operation device such as a mouse used in the operation of a personal computer (hereinafter referred to as a PC). In addition, the switch described in this application can be used as a micro switch in various electronic devices including an operation 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 described. FIG. 1 is a schematic perspective view showing an example of the appearance of the operation device 1 described in the present application. FIG. 1 shows an example in which the operation device 1 described in the present application is applied to a mouse used for operation of an electronic device such as a PC. The operation device 1 includes a push operation unit 10 such as a mouse button that accepts an operation pressed by an operator's finger, and a rotation operation unit 11 such as a mouse wheel that accepts an operation rotated by the operator's finger. In addition, the turning operation unit 11 is configured to accept not only the turning operation but also the pressing operation, and also functions as the pressing operation unit 10. In addition, a signal line 12 that outputs an electrical signal to an external device such as a PC is connected to the operation device 1. Furthermore, the operation device 1 is not limited to wired communication using the signal line 12, and can output electrical signals through various communication methods such as wireless communication.

Inside the operation device 1, each of the press operation section 10 and the rotation operation section 11 accommodates a switch 2 described later. When the press operation section 10 is pressed, pressing corresponds to the press operation Switch 2 in the internal part of the unit 10. The switch 2 outputs a signal based on the pressing condition from the signal line 12 to an external electronic device such as a PC.

That is, the operation device 1 described in the present application includes a pressing operation unit 10 that accepts a pressing operation from the outside, a rotating operation unit 11 that accepts an operation such as a rotating operation, and further includes a switch 2 inside. Then, the operation device 1 transmits the pressing operation received by the pressing operation unit 10 and/or the rotating operation unit 11 to the switch 2 as an external pressing, and outputs a signal based on the operation of the switch 2 to an external electronic equipment.

＜Switch 2＞ Next, the switch 2 described in this application will be described. 2 is a schematic perspective view showing an example of the appearance of the switch 2 described in the present application. In addition, in the specification of the present application, regarding the direction of the switch 2, the left-front side is described as front, the right back side is represented as back, the upper side is expressed as upper, the lower side is expressed as lower, and the left side is expressed as left and right near front side. The expression on the right is a direction for convenience of description, and does not limit the direction in which the switch 2 is assembled. As described above, the switch 2 is housed inside the electronic device such as the operating device 1 as a micro switch, and accepts the pressing operation received by the pressing operation portion 10 of the operating device 1 and the like as pressing from the outside.

The switch 2 includes a frame 20 having a substantially rectangular parallelepiped shape. The housing 20 is formed by a lower base 20a and an upper cover 20b. A rectangular insertion hole 200 through which the pressing member 21 is inserted is formed on the upper surface of the housing 20 when viewed from the front side to the left of the center. The pressing member 21 inserted into the insertion hole 200 is a member that is moved up and down by being pressed 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. Furthermore, three connection terminal portions 22 that are metal pieces that can connect other electrical components protrude from the lower side of the housing 20.

In the switch 2 formed in this manner, the pressing operation from the outside received by the operation device 1 is transmitted to the pressing member 21 as a pressing from the outside of the housing 20. The pressing member 21 is moved downward by being pressed from the outside, and moved upward when the pressing from the outside is released.

Next, the internal structure of the switch 2 will be described. FIG. 3 is a schematic exploded perspective view showing an example of the switch 2 described in the present application. 4 is a schematic cross-sectional view showing an example of a cross-section of the switch 2 described in the present application. FIG. 4 shows a cross section in the direction of the arrow cut by a vertical plane including the A-B line segment shown in FIG. 2.

In the housing 20 of the switch 2, an area as a contact chamber is secured, and the contact chamber houses a contact mechanism for opening and closing the circuit. An insertion hole 200 penetrating from the outside of the frame body 20 is opened on the upper surface of the contact chamber, and the pressing member 21 is inserted into the insertion hole 200.

The contact mechanism housed in the contact chamber will be described. In the contact chamber, as a contact mechanism, members such as a common contact terminal 23, a first contact terminal 24, a second contact terminal 25, a movable contact piece 26 and the like are arranged. The common contact terminal 23 is disposed on the left side in the contact chamber, and is 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 is electrically connected to the connection terminal portion 22 on the right side. The second contact terminal 25 is disposed on the lower right side in the contact chamber, and is electrically connected to the central connection terminal 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 becomes 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 that moves between the first contact terminal 24 and the second contact terminal 25, and becomes the movable contact 261. In addition, an urging portion 262 is formed in the movable contact piece 26. The urging portion 262 functions as a return spring punched out near the center and bent into an arc shape, and the front end of the urging portion 262 is locked in the contact chamber The locking plate 27 formed near the center of the. The urging portion 262 generates a reaction force against the pressing of the pressing member 21.

Above the first contact terminal 24, a contact buffer member 28 formed of an elastic material is arranged. The contact buffer member 28 contacts the first contact terminal 24 from above. In addition, below the urging portion 262 of the movable contact piece 26, a buffer member 29 for an urging portion formed using an elastic material is arranged. The buffer member 29 for the urging portion contacts the urging portion 262 from below.

In the contact mechanism configured in this manner, the pressing member 21 is pressed downward from the outside and moves downward, and the movable contact piece 26 is pressed. By pressing the movable contact piece 26, the free end, that is, the right end side of the movable contact piece 26 descends, and the movable contact 261 contacts the second contact terminal 25. As a result, the left-side connection terminal portion 22 connected to the common contact terminal 23 and the center connection terminal portion 22 connected to the second contact terminal 25 become conductive.

When the pressing of the pressing member 21 is released, the movable contact piece 26 is urged upward by the reaction force of the urging portion 262. When the movable contact piece 26 is urged upward, the pressing member 21 moves upward. In addition, when the movable contact piece 26 is urged upward by the urging portion 262, the movable contact 261 located on the right end side of the movable contact piece 26 rises and contacts the contact buffer member 28. In addition, when the movable contact 261 of the movable contact piece 26 rises, the movable contact 261 may also be in contact with the first contact terminal 24 whose contact is covered with the buffer member 28. In this case, the movable contact piece 26 and the contact buffer member 28 indirectly contact.

Further, the shapes of the pressing member 21, the movable contact piece 26, the contact buffer member 28, and the biasing member buffer member 29 will be described. 5A and 5B are schematic external views showing an example of the pressing member 21 included in the switch 2 described in the present application. FIG. 5A is a schematic front view, and FIG. 5B is a schematic perspective view shown from a perspective viewed obliquely from below. The pressing member 21 includes a pressed protrusion 210 on the upper side and a pressing plate 211 on the lower side. The pressed protrusion 210 of the pressing member 21 has a substantially rectangular parallelepiped shape, and the upper end is formed into a semi-circular curved surface when viewed from the front. The upper portion of the pressed protrusion 210 protrudes from the insertion hole 200 of the housing 20 and receives pressing from the outside. The pressing plate 211 has a substantially rectangular shape in a plan view, and the 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 to be inclined upward in a tapered shape, and the first ridge line 211a that forms the boundary between the flat portion and the tapered portion extends linearly in the front-rear direction. Among the second ridge lines 211b on the right end side of the lower surface of the pressing plate 211, the portions contacting the movable contact piece 26 are the portions of the front end and the rear end slightly protruding in the right direction. During the pressing of the movable contact piece 26, the pressing member 21 contacts the movable contact piece 26 at a plurality of points including at least the first ridge line 211 a and the second ridge line 211 b.

6A and 6B are schematic external views showing an example of the movable contact piece 26 included in the switch 2 described in the present application. FIG. 6A is a schematic plan view, and FIG. 6B is a schematic perspective view shown from a viewpoint viewed obliquely from below. 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 the right end portion serving as the free end is formed as a movable contact 261. A contact protrusion 261 a protrudes from the lower surface side of the movable contact 261. The contact protrusion 261a protrudes from the lower surface side of the elastic piece 261b punched out from the right end to the left. The elastic piece 261b has a substantially rectangular shape, one side on the right side is continuous with the left end of the movable contact piece 26, and since it swings about a continuous portion as a fulcrum, it has an elastic shape with elasticity. The urging portion 262 described above is formed on the left side of the elastic piece 261b. The urging portion 262 is formed so as to bend a portion punched out in a strip shape from the right side to the left side into a circular arc shape convex downward so that it functions as a return spring. The front end of the urging portion 262 becomes a locking portion 262a, which is locked to the locking plate 27 protruding from the base 20a of the housing 20, and the urging portion 262 is locked to the locking plate 27 The locking portion 262a is a swing axis, and swings the side of the movable contact 261 on the right side.

7A and 7B are schematic perspective views showing an example of a buffer member included in the switch 2 described in the present application. FIG. 7A shows a buffer member 28 for contacts. The contact buffer member 28 is a member formed by molding an elastic material such as polyurethane rubber, and is formed by combining an upper member 280 and a lower member 281. The upper member 280 has a substantially rectangular parallelepiped shape, and the right end side in contact with the inner wall surface of the frame body 20 extends downward and is fixed. A cutout 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 formed by the upper member 280 and the lower member 281 covers the first contact terminal 24 with the buffer member 28, and the movable contact 261 that becomes the free end of the movable contact piece 26 is directly or indirectly connected to the contact via the first contact terminal 24 The lower part 281 of the cushion member 28 is in contact with the dot.

FIG. 7B shows the buffer member 29 for the urging portion. The buffer member 29 for the urging portion is formed by molding an elastic material such as polyurethane rubber, and is formed in a shape in which a base portion 291 having a substantially rectangular parallelepiped shape is formed on the lower surface of a plate-like body 290 having a substantially rectangular shape in plan view. A notch is formed on the back side of the plate-shaped body 290 and is formed so as to fit the second contact terminal 25. The plate-shaped body 290 abuts on the lower surface of the urging portion 262 with the upper surface on the left end side. The base portion 291 is formed to the right of the plate-shaped body 290. Therefore, the left end side of the plate-shaped body 290 is oscillated by the urging portion 262 and flexes as shown by the arrow in the figure to absorb impact.

<Operation of switch 2> The operation of the switch 2 described in the present application configured as described above will be described. 8 to 11 are schematic cross-sectional views showing an example of the operation of the switch 2 described in this application. 8 to 11 are cross-sections cut by a vertical plane including the line A-B shown in FIG. 2 from a front view.

FIG. 8 shows a state where the pressing member 21 is not pressed from the outside. The position between the lower end of the pressing member 21 relative to the swing fulcrum 260 where the left end of the movable contact piece 26 is locked and the position where the locking portion 262a at the front end of the urging portion 262 of the movable contact piece 26 is locked, is pressed by the lower part The lower surface of the plate 211 is in contact with the movable contact piece 26. In the state shown in FIG. 8, the movable contact piece 26 is resisted by the pressing member 21 by the urging portion 262 between the contact portion pressed by the pressing member 21 and the movable contact 261. Since the reaction force is pushed upward, the free end side formed as the movable contact 261 contacts the contact buffer member 28 disposed on the upper right side in the contact chamber.

FIG. 9 shows a state where the pressing member 21 is pressed downward from the outside and moved downward from the state shown in FIG. 8. As the pressing member 21 moves downward, 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 211 a and the second ridge line 211 b of the pressing plate 211. The movable contact piece 26 is pressed by the pressing member 21 as a whole, and is to move downward using the swing fulcrum 260 as a swing axis. However, the movable contact piece 26 is pushed upward by the reaction force against the pressing of the pressing member 21 by the urging portion 262 between the contact portion pressed by the pressing member 21 and the movable contact 261, Therefore, the movable contact 261 maintains a state of contact with the contact buffer member 28 disposed on the upper right side in the contact chamber. Therefore, the movable contact piece 26 is pressed downward by the pressing member 21 and is bent downward to become a flexed state.

FIG. 10 shows a state where the pressing member 21 is further pressed from the outside and moved downward from the state shown in FIG. 9. When the pressing member 21 is further moved downward, the movable contact piece 26 is pressed by the pressing member 21 as a whole, and it is intended to move downward using the swing fulcrum 260 as the swing axis. In addition, since the urging portion 262 of the movable contact piece 26 swings downward with the locking portion 262a locked on the locking plate 27 as the swing axis, the entire movable contact piece 26 swings around the swing fulcrum 260 as the swing axis and reverses . Therefore, the contact protrusion 261a of the movable contact 261 comes into contact with the second contact terminal 25 disposed as a fixed contact on the lower right side in the contact chamber. As a result, the left-side connection terminal portion 22 connected to the common contact terminal 23 and the center connection terminal portion 22 connected to the second contact terminal 25 become conductive.

The contact protrusion 261a of the movable contact 261 collides with the second contact terminal 25 due to the reversed momentum of the movable contact piece 26, so it is accompanied by an impact. However, since the left end side of the plate-shaped body 290 to which the biasing member buffer member 29 to which the second contact terminal 25 is fitted is bent as shown by the arrow in FIG. 7B, the movable contact 261 of the movable contact piece 26 is absorbed The impact when colliding with the second contact terminal 25 and the impact when the urging portion 262 swings. Furthermore, by reducing 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. Furthermore, since the contact protrusion 261a of the movable contact 261 is formed on the elastic piece 261b of the 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 where the pressing member 21 is further pressed from the outside and moved to the lowest point of the movable region from the state shown in FIG. 10. When the pressing member 21 moves to the lowermost point, the movable contact piece 26 is pressed by the pressing member 21 as a whole, and the swinging fulcrum 260 is intended to move downward in the swing axis. Therefore, the movable contact piece 26 is bent so as to be bent downward by being supported by the swing fulcrum 260 and the movable contact 261 at both ends. However, the conduction state remains unchanged.

When the pressing of the pressing member 21 is released, the movable contact piece 26 is urged upward by the reaction force of the urging portion 262. When the movable contact piece 26 is urged upward, the pressing member 21 moves upward. In addition, when the movable contact piece 26 is urged upward by the urging portion 262, the free end of the movable contact piece 26 can move up the movable contact 261 and come into contact with the contact buffer member 28. That is, it becomes the state illustrated in FIG. 8. The movable contact piece 26 collides with the contact cushioning member 28 when the pressing member 21 is released from the pressing and raised. The shock caused by the collision is absorbed by the contact buffer member 28. Furthermore, when the movable contact piece 26 is designed to collide with the first contact terminal 24 covered by the contact buffer member 28, the impact caused by the collision of the movable contact piece 26 is also affected by the contact buffer member 28 absorption. That is, the movable contact piece 26 directly contacts the contact buffer member 28 or indirectly via the first contact terminal 24, so the contact buffer member 28 relaxes the impact at the time of collision and suppresses the generation of sound caused by the collision .

As described above, the switch 2 described in the present application relaxes various members by the elastic shape of the elastic piece 261b protrudingly provided at the time of the contact of the buffer member 28 for contact, the buffer member 29 for urging portion, and the movable contact 261 The impact at the time of collision has an excellent effect such as a mute effect that suppresses the sound generated by the collision.

Next, a mute effect based on the shape of the pressing member 21 included in the switch 2 described in this application will be described. 12A is an explanatory diagram schematically showing an example of a mechanical system model related to the pressing member 21 and the movable contact piece 26 included in the switch 2 described in the present application. 12B is a diagram for comparison, and is an explanatory diagram schematically showing an example of a mechanical system model related to a pressing member 21x and a movable contact piece 26x included in a conventional switch 2x. 12A and 12B show the pressing member 21, the pressing member 21x, the movable contact piece 26, and the movable contact piece 26x from the front view. In FIGS. 12A and 12B, a dotted line indicates the center of the force that presses the movable contact piece 26 and the movable contact piece 26x upon being pressed from the outside, and the arrow indicates the pressing member 21 and the pressing member 21x on the movable contact piece 26 and the movable contact The force exerted by piece 26x.

As illustrated in FIG. 12A, the lower surface of the pressing plate 211 is formed in a substantially planar shape, and the pressing plate 211 is formed under the pressing member 21 included in the switch 2 described in the present application. The movable contact piece 26 is pressed by the pressing member 21 to flex and bend downward. Therefore, the pressing member 21 is in contact with the movable contact piece 26 at two contact points of the first ridge line 211a and the second ridge line 211b. That is, the pressing member 21 has a center with respect to a force that presses the movable contact piece 26 by being pressed from the outside, and the first ridge line 211a side that becomes the swing fulcrum 260 side and the second ridge line 211b side that becomes the movable contact side serve as the contact portions . Then, as shown by the arrows in the figure, the pressing member 21 presses the movable contact piece 26 at two contact points. In addition, in the conventional switch 2x shown for comparison in FIG. 12B, the lower portion of the pressing member 21x is formed in a downwardly convex arc shape, and the pressing member 21x is substantially at a position that coincides with the center of the pressing force Is in contact with the movable contact piece 26x, and as shown by the arrow in the figure, the movable contact piece 26x is pressed with one contact position.

13, 14A, and 14B are explanatory diagrams schematically showing an example of a mechanical model of a conventional switch 2x. Fig. 13 is an explanatory diagram schematically showing the relationship between the load and the movable contact piece 26x in the form of a mechanical system model, and Figs. 14A and 14B are schematic diagrams showing the pressing amount and operating load of the conventional switch 2x in the form of a mechanical system model. Graph of the relationship. FIG. 13 shows a cross section of the switch 2x cut in a vertical plane from a front view, and intermittently shows the behavior of the movable contact piece 26x. In addition, FIG. 13 shows a conventional switch 2x, and therefore, a buffer member for a contact and a buffer member for a biasing portion are not described. FIG. 14A schematically shows the relationship between the load applied to the support beams at both ends and the deflection, and FIG. 14B schematically shows the timing of the reverse operation. 15 shows the pressing amount (operation stroke) of the pressing member 21x when the pressing member 21x of the switch 2x is pushed downward as the horizontal axis, and the vertical axis represents the operating load received by the pressing member 21x when being pressed. relationship.

As shown in FIG. 13, the lower surface of the pressing member 21x is formed in an arc shape. Therefore, during the pressing-in process, the movable contact piece 26x is brought into contact with one contact portion. In FIGS. 13, 14A, and 14B, the dotted hollow arrow indicates the position A shown in FIG. 13, and the pressing force when the pressing member 21x is in contact with the movable contact piece 26x. In addition, in FIG. 15, the broken line indicates the position A shown in FIG. 13, and the relationship between the pressing amount when the pressing member 21 x contacts the movable contact piece 26 x and the operating load. The solid arrows shown in solid lines shown in FIGS. 13, 14A, and 14B, and the solid lines shown in FIG. 15 show the position B closer to the swing fulcrum 260x side (facing the left side of the figure) than the position A, assuming the pressing member 21x Pressing force and relationship when contacting with the movable contact piece 26x. The hollow arrow of the one-point chain line shown in FIGS. 13, 14A and 14B, and the one-point chain line shown in FIG. 15 show the position C closer to the movable contact 261x side (facing the right side of the figure) than the position A, assuming The pressing force and relationship when the pressing member 21x is in contact with the movable contact piece 26x.

FIG. 14A shows the relationship between the pressing force of the movable contact piece 26x and the movable contact piece 26x by hypothetically supporting beams at both ends. In the case of hypothetical support beams at both ends, the force required to produce the same deflection is greatest at position B near the swing fulcrum 260x, and secondly, the forces at position A and position C become smaller sequentially. FIG. 14B shows the timing of the reversal operation. The position B near the swing fulcrum 260x is the latest, and the positions A and C become earlier in sequence. From these relationships, the graph shown in FIG. 15 is obtained. In FIG. 15, the point at which the operating load drops sharply is the position where the movable contact piece 26x is reversed. As shown in FIG. 15, at the reverse position, the load becomes larger in sequence as the swing fulcrum 260x is approached, and the timing of the reverse operation with respect to the push-in amount becomes late. In addition, a loud sound is generated during the reverse operation.

16 is an explanatory diagram schematically showing an example of a mechanical system model of the switch 2 described in the present application, and FIG. 17 is a schematic diagram showing the relationship between the pressing amount of the switch 2 described in the present application and the operating load in the form of a mechanical system model. An example of a graph. In addition, in FIG. 16, in order to easily understand the behavior of the movable contact piece 26, the description of the contact buffer member 28 and the biasing member buffer member 29 is omitted. Hereinafter, silent effects other than the silent effects produced by these buffer members will be described. As shown in FIG. 16, since the lower surface of the pressing member 21 included in the switch 2 described in the present application is formed in a planar shape, during the press-fitting process, the movable contact piece 26 is brought into contact with two contact portions. In FIG. 16, the hollow arrows indicated by broken lines, solid lines, and one-dot chain lines are for comparison of the pressing force when the movable contact piece 26 is contacted at the positions corresponding to the positions A, B, and C illustrated in FIG. 13. And show. In FIG. 17, the thick line indicates the relationship between the push-in amount of the switch 2 and the operating load described in this application. For comparison, the broken line, solid line, and one-dot chain line indicate the push-in amount at position A, position B, and position C. Operating load relationship.

In the switch 2 described in the present application, the pressing member 21 is pressed from the outside, contacts the movable contact piece 26 via the first ridge line 211 a and the second ridge line 211 b, and presses the movable contact piece 26. The movable contact piece 26 pressed by the pressing member 21 maintains a state of being in contact with the first ridge line 211a and the second ridge line 211b while being flexed, but the reaction force against the first ridge line 211a and the second ridge line 211b and its ratio depend on the amount of indentation And change. Therefore, the relationship between the pushing amount and the operating load does not change abruptly as when pressing at the contact part of the position A, the position B, and the position C, but changes as a thick line as 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 collision with the second contact terminal 25 becomes longer, and the contact protrusion 261a of the movable contact 261 and The collision speed of the second contact terminal 25 becomes slow. By making the collision speed of the contact protrusion 261a slower, the impact at the time of collision can be alleviated, and the sound produced by the collision of the contact protrusion 261a, the so-called click sound, becomes smaller.

As described above, the switch 2 described in the present application is in contact with the movable contact piece 26 at multiple places by the pressing member 21, and compared with the case where the movable contact piece 26 is brought into contact at one place, the generation of sound can be suppressed.

In addition, the shape of the pressing member 21 is not limited to the above-mentioned form, and it can be deformed into various shapes as long as it comes into contact with the movable contact piece 26 at multiple places during pressing. 18A and 18B are schematic external views showing an example of the pressing member 21 included in the switch 2 described in this application. FIG. 18A is a schematic front view, and FIG. 18B is a schematic perspective view shown from a viewpoint viewed obliquely from below. In the pressing member 21 illustrated in FIGS. 18A and 18B, portions corresponding to the first ridge line 211a and the second ridge line 211b project downward, and become the first contact protrusion 211c and the second contact protrusion 211d. The pressing member 21 illustrated in FIGS. 18A and 18B abuts on the movable contact piece 26 by the first contact protrusion 211c and the second contact protrusion 211d, and presses the movable contact piece 26. Therefore, when the pressing member 21 illustrated in FIGS. 18A and 18B is used, the switch 2 described in the present application also achieves a mute effect.

As described above, as described in the exemplary embodiment, the switch 2 described in the present application has various shapes such as the shape of the pressing member 21, the shape of the movable contact piece 26 near the movable contact 261, the shape of the contact buffer member 28, A cushioning member such as a cushioning member 29 for the urging portion suppresses the generation of sound accompanying movement of the movable contact piece 26, and achieves an excellent effect.

The present invention is not limited to the embodiments described above, and can be developed in various other forms. Therefore, the above-described embodiment is merely a mere illustration in all aspects, and is not to be interpreted in a limited manner. The technical scope of the present invention is described by applying for the scope of patents, and is not limited by the text of the specification. Furthermore, all modifications and changes within the equivalent scope of the patent application are within the scope of the invention.

For example, in the above-mentioned embodiment, an example of the contact buffer member 28 formed by fitting the first contact terminal 24 is exemplified, but the present invention is not limited to this, and the first contact terminal 24 may not be present Instead, only various forms such as buffer members are developed.

In addition, in the above-described embodiment, a mouse is exemplified as the operation device 1 including the switch 2, but the present invention is not limited to this, and various devices such as a keyboard and various buttons used for operation can be used as the operation device 1. Various forms of application, etc. are developed.

1: Operating device 10: Press the operation part 11: Rotating operation part 12: Signal cable 2. 2x: switch 20: Frame 20a: Pedestal 20b: Hood 200: through hole 21, 21x: pressing member 210: pressed protrusion 211: Press plate 211a: The first ridge 211b: second ridge 211c: First contact protrusion 211d: Second contact protrusion 22: connection terminal 23: Common contact terminal 24: first contact terminal 25: Second contact terminal (fixed contact) 26, 26x: movable contact piece 260, 260x: swing pivot 261, 261x: movable contact 261a: Contact protrusion 261b: Elastic sheet 262: Force Department 262a: locking part 27: locking plate 28: Cushioning member for contact 280: upper member 281: Lower member 29: Cushioning member for force applying part 290: Plate-like body 291: Base part A, B, C: Location

FIG. 1 is a schematic perspective view showing an example of the appearance of the operation device described in the present application. 2 is a schematic perspective view showing an example of the appearance of the switch described in the present application. 3 is a schematic exploded perspective view showing an example of the switch described in the present application. 4 is a schematic cross-sectional view showing an example of the cross-section of the switch described in the present application. 5A is a schematic external view showing an example of a pressing member included in the switch described in the present application. 5B is a schematic external view showing an example of a pressing member included in the switch described in the present application. 6A is a schematic external view showing an example of a movable contact piece included in the switch described in the present application. 6B is a schematic external view showing an example of a movable contact piece included in the switch described in the present application. 7A is a schematic perspective view showing an example of a buffer member included in the switch described in the present application. 7B is a schematic perspective view showing an example of a buffer member included in the switch described in the present application. 8 is a schematic cross-sectional view showing an example of the operation of the switch described in the present application. 9 is a schematic cross-sectional view showing an example of the operation of the switch described in the present application. 10 is a schematic cross-sectional view showing an example of the operation of the switch described in the present application. 11 is a schematic cross-sectional view showing an example of the operation of the switch described in the present application. 12A is an explanatory diagram schematically showing an example of a mechanical system model related to a pressing member and a movable contact piece included in the switch described in the present application. 12B is an explanatory diagram schematically showing an example of a mechanical system model related to a pressing member and a movable contact piece included in a conventional switch. 13 is an explanatory diagram schematically showing an example of a mechanical model of a conventional switch. 14A is an explanatory diagram schematically showing an example of a mechanical model of a conventional switch. 14B is an explanatory diagram schematically showing an example of a mechanical model of a conventional switch. 15 is a graph schematically showing the relationship between the push-in amount of the conventional switch and the operating load in the form of a mechanical system model. 16 is an explanatory diagram schematically showing an example of a mechanical system model of the switch described in the present application. 17 is a graph schematically showing an example of the relationship between the push-in amount of the switch described in the present application and the operating load in the form of a mechanical system model. 18A is a schematic external view showing an example of a pressing member included in the switch described in the present application. 18B is a schematic external view showing an example of a pressing member included in the switch described in the present application.

2: switch 20: Frame 20a: Pedestal 20b: Hood 200: through hole 21: Pressing member 23: Common contact terminal 24: first contact terminal 25: Second contact terminal (fixed contact) 26: movable contact piece 260: Swing fulcrum 261: movable contact 262: Force Department 27: locking plate 28: Cushioning member for contact 280: upper member 281: Lower member 29: Cushioning member for force applying part 290: Plate-like body 291: Base part

Claims (6)

A switch includes: a fixed contact; a movable contact piece having flexibility, and one end side is a swing fulcrum and the other end side is a movable contact; and a pressing member, which is pressed against the movable contact piece by external pressure The swing fulcrum and the movable contact are pressed, and the movable contact piece is pressed by the pressing member to swing, the movable contact is in contact with the fixed contact, and the switch is characterized by including a buffer member, The buffer member is arranged to abut on the movable contact piece, and the movable contact piece has an urging portion between a contact portion pressed by the pressing member and the movable contact, the The urging portion generates a reaction force against the pressing of the pressing member, and the buffer member is a buffer member for the urging portion arranged so as to contact the urging portion, and the urging portion is formed in the movable portion Contact sheet. The switch as described in item 1 of the patent application range, wherein the movable contact piece is formed to be flexed by being pressed by the pressing member, and the movable contact side to be locked when the pressing member is further pressed The locking portion of the force portion swings for the swing shaft, thereby making contact with the fixed contact. The switch as described in item 1 or item 2 of the patent application scope includes: a buffer member for contacts, which abuts the other end of the movable contact piece when the pressing member is not pressed from the outside Side way configuration. The switch according to item 1 of the patent application scope, wherein the movable contact of the movable contact piece is formed in an elastic shape at the other end. The switch according to item 1 of the patent application range, wherein the pressing member contacts the movable contact piece with a plurality of contact portions and presses the movable contact piece. An operating device, characterized in that it includes: a pressing operation part that accepts a pressing operation from outside; and a switch as described in item 1 of the patent application scope, which uses the pressing operation received by the pressing operation part as Pressing from the outside is communicated, and the operation device outputs a signal based on the movement of the movable contact included in the switch.

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