JP3656235B2 - Electronic keyboard instrument contact device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a contact device used in an electronic musical instrument or the like, and more particularly to a contact device of a multistage switch that makes a time difference.
[0002]
[Prior art]
In electronic keyboard instruments, etc., there are prone two-stage make key switches made of an elastic material such as rubber corresponding to each key in order to detect the key code signal of the pressed key, the key pressing speed, etc. It is equipped. In such a two-stage make switch, a prone switch is fixed on a base made of a printed board or the like, an annular first movable contact is projected from the inner surface side of the prone switch, and a second movable switch is provided at the center thereof. The contact is projected differently from the projecting length of the first movable contact, and a fixed contact pattern is formed on the base surface side corresponding to each movable contact. When the actuator elastically deforms the prone switch in response to the key pressing operation, the first or second movable contact having a long protruding length first makes up, and then the movable contact having a short protruding length makes up.
[0003]
Conventionally, an annular movable member is provided on the inner surface side of the prone flexible member switch, and a plurality of movable contact terminals are formed on the end surface of the annular movable member, and the protruding lengths of these movable contact terminals are changed. Thus, a multistage key switch has been proposed in which the closing time of the movable terminal is shifted.
[0004]
[Problems to be solved by the invention]
However, the conventional two-stage make switch is manufactured by changing the protrusion length of each movable contact while keeping the contact end face of the movable contact parallel to the pattern surface of the fixed contact when changing the protrusion length of each movable contact. It was not easy, and the manufacturing process was laborious. Further, in the conventional switch structure, in order to maintain electrical stability and maintain a conductive state, the pressure between the conductive contacts must be increased as much as possible. This pressure is derived from the force of the elastically deforming portion after the contact is made. Since the force of the elastic deformation part before make-up was subtracted, the force of the elastic deformation part before make-up could not be increased too much. For this reason, the reaction force of the deforming member at the initial stage of key depression becomes small, the touch feeling of the switch becomes worse, and stabilization after making the switch cannot be maintained and chattering may occur.
[0005]
The first object of the present invention is to provide a contact device for a multistage make switch that is easy to manufacture. A second object of the present invention is to provide a contact device that suppresses chattering, has high electrical stability, and has a good pressing feeling.
[0006]
In order to achieve the first object, the invention according to claim 1 includes a driven portion that receives a pressing force from an actuator provided on a key that rotates about one rotation fulcrum , and the driven A contact device for an electronic keyboard instrument in which a plurality of movable contacts make up in order with a time difference with respect to fixed contacts corresponding to a plurality of movable contacts in the middle of pressing the key by receiving a pressing force, and integrated with the driven portion The first prone part, the second prone part integrally formed on the outer periphery of the mouth of the first prone part, and the second prone part integrally formed on the outer periphery of the second prone part A fixed support member that is connected and fixed to the surface on which the fixed pattern is formed, and the plurality of movable contacts are provided at the mouth of the first prone portion, and the plurality of movable contacts are formed in the same surface. The same surface is parallel to the surface on which the fixed contact is patterned. Then, a pressing force is applied to the driven portion from an oblique direction with respect to this surface, and the actuator has an inclined contact surface with respect to the driven portion, and before the movable contact and the fixed contact make up, An electronic device, wherein the movable contact is pushed down from an oblique direction and driven so that an inclination angle of the contact surface gradually increases in a certain direction while the contact surface is in contact with the driven part. Provide a keyboard instrument contact device.
[0007]
Further, in the invention according to claim 2, in the invention of claim 1, there is a driven part that receives a pressing force, and the driven part receives the pressing force, whereby a plurality of movable contacts correspond to the fixed contact. A contact device for an electronic keyboard instrument that sequentially makes a time difference with respect to the inner surface of the first prone portion, and a reaction force that protrudes downward from the mouth integrally with the first prone portion. has a member, the reaction force member to a state where the first movable contact after the non-pressing time or the pressing is brought into contact with the surface on which the fixed contact is patterned before contact with the fixed contact of the driven part Thus, in addition to the reaction force due to the elastic deformation of the first and second prone portions, the reaction force against the pressing force is increased .
[0010]
[Action]
According to the first aspect of the present invention, the end surfaces of the plurality of movable contacts that contact the fixed contacts with a time difference when pressed down are formed in the same plane without a step.
[0012]
In the present invention, the same surface is formed in parallel with the fixed contact pattern surface, and the actuator applies a force to the driven portion from an oblique direction. Thereby, since each movable contact operates in an oblique direction, the timing of contact with the fixed contact is shifted.
[0013]
In order to achieve the second object, in the invention according to claim 2 , the reaction force member protrudes from the inner surface side center of the prone switch. At the time of switch making, the reaction force member contacts the base on which the fixed contact is formed to support the switch. In this case, the reaction force member may be configured to always contact the base when the switch is not pressed down, or may be configured to contact the upper surface of the base immediately after the switch is pressed and before the first movable contact is made. As a result, the stability at the time of making the switch increases and chattering is suppressed, and the pressing reaction force of the switch increases to improve the key pressing feeling.
[0014]
【Example】
FIG. 1 is a configuration diagram of a contact device according to a reference example of the present invention. For example, an operation panel 2 of an electronic musical instrument is mounted on a base 1 made of a printed board. A rubber switch 3 according to this reference example is fixed on the base 1. The rubber switch 3 includes a driven part 5 that receives a pressing force, a first prone part 6, an annular mouth part 7 of the first prone part 6, and a first part formed on the outer peripheral part of the mouth part 7. It consists of two prone parts 8. The driven portion 5 may be pressed directly with a finger or the like, or may be configured to be pressed via an actuator 4 (or a push button) as indicated by a one-dot chain line. A first movable contact 9 and a second movable contact 10 are formed at the mouth portion 7 of the first prone portion 6. Corresponding to the first and second movable contacts 9 and 10, the first fixed contact 11 and the second fixed contact 12 are patterned on the upper surface of the base 1. The rubber switch 3 is connected and fixed to the base 1 via a fixing support portion 13 that becomes a mouth portion of the second prone portion 8.
[0015]
The first movable contact 9 and the second movable contact 10 are separately formed on the end surface of the mouth portion 7 of the first prone portion 6 as shown in the figure. That is, the movable contacts 9 and 10 are both formed in the movable contact forming surface 14 which is the end surface of the mouth portion 7 of the same first prone portion 6. The movable contact forming surface 14 is formed to be inclined with respect to the base 1 on which the fixed contacts 11 and 12 are formed so that the first movable contact 9 is closer to the upper surface of the base than the second movable contact 10. With this configuration, when the actuator 4 is pushed down, the second lower bay portion 8 is first elastically deformed so that the first movable contact 9 abuts on the first fixed contact 11 and the first stage switch is Make up. When the actuator 4 is further pushed down, the first lower bay portion 6 is elastically deformed, the second movable contact 10 comes into contact with the second fixed contact 12, and the second stage switch is made. By forming the first and second movable contacts 9 and 10 on the movable contact forming surface 14 formed obliquely in this way, the driven portion 5 of the rubber switch 3 is pushed down vertically by the actuator 4. Sometimes the first and second movable contacts 9, 10 can be made in turn with a time difference. Such an inclined movable contact forming surface 14 can be easily manufactured by, for example, cutting the mouth portion 7 of the first Fushiwan portion 6 obliquely.
[0016]
FIG. 2 is a block diagram of an embodiment of the present invention. This embodiment is a rubber switch used as a musical sound control switch for an electronic keyboard instrument. The key 15 is rotatably attached to the key support member 20 via the hinge portion 16 at the rear end. A base (printed circuit board) 1 is fixed to the lower part of the key support member 20, and a 2-make type rubber switch 3 is mounted thereon. In this rubber switch 3, a movable contact forming surface 14 that is an end surface of the mouth portion 7 of the first Fushiwan 6 is formed in parallel to the upper surface of the base 1, and the first and second movable contacts 9, 10 and these The distance between the first and second fixed contacts 11 and 12 corresponding to is the same. The actuator 4 is integrally formed under the key 15. The key 15 rotates around the hinge portion 16 at the rear end when the key is depressed. The contact surface (drive surface) 17 of the actuator 4 with respect to the driven portion 5 of the rubber switch 3 is inclined as shown in the figure, and applies a pressing force to the rubber switch 3 from an oblique direction. In this case, as the key pressing stroke advances, the key 15 rotates about the hinge portion 16 and is pushed down (arrow P), so that the inclination of the contact surface 17 of the actuator 4 becomes larger as shown by the dotted line. . In this way, by applying a pressing force from an oblique direction rather than a vertical direction perpendicular to the surface of the base 1, in the example shown in the figure, the first movable contact 9 and the second movable contact 10 are respectively fixed contacts 11 when pressed. , 12, the first movable contact 9 first contacts the first fixed contact 11 to make the switch. As a result, the first and second two-stage make switch operations are achieved. In this case, the protruding length of the first movable contact 9 may be longer than that of the second movable contact 10.
[0017]
FIG. 3 is a block diagram of still another embodiment of the present invention. An operation panel 2 is attached to an upper portion of a base 1 made of a printed board. The rubber switch 3 of this embodiment is mounted on the base 1. The rubber switch 3 is formed on the driven portion 5 that receives a pressing force from the push button 18, the first prone portion 6, the mouth portion 7 of the first prone portion 6, and the outer periphery of the mouth portion 7. The second prone portion 8 and a fixed support portion 13 for connecting and fixing the second prone portion 8 to the base 1 are configured. A first movable contact 9 and a second movable contact 10 having different protruding heights are formed at the mouth portion 7 of the first prone portion 6. In the present embodiment, a reaction force member 19 that reaches the base 1 is formed inside the center portion of the first prone portion 6. This reaction force member 19 is in contact with the base 1 when the driven portion 5 is not pressed and no pressing force is applied. Or you may form so that the to-be-driven part 5 may contact | abut to the base surface, before making the first movable contact in the state which pushed in slightly.
[0018]
By providing such a reaction force member 19, the reaction force can be increased when the push button 18 is depressed, particularly immediately after the push button 18 is depressed. The conduction state is maintained and chattering is suppressed. The switch provided with such a reaction force member 19 is not limited to the 2-make switch, but can be applied to a one-make switch.
[0019]
【The invention's effect】
As described above, in the present invention, the end face of the annular mouth portion is formed obliquely and the first and second movable contacts are provided on the same inclined end face, or the switch is pressed from the oblique direction. The makeup time of the two movable contacts formed on the surface can be shifted. By using such a configuration, it is possible to easily manufacture a contact device having a 2-make switch structure.
[0020]
Further, by providing the reaction force member 19 so as to protrude inside the center portion of the prone elastic member, the reaction force can be increased when the switch is pressed down, particularly immediately after the switch is pressed down, and the pressing feeling of the switch is good. At the same time, a good conductive state is stably maintained after the switch is made, chattering is suppressed, the stability of electrical conduction is improved, and the reliability of the switch operation is increased.
[Brief description of the drawings]
FIG. 1 is a structural explanatory diagram of a reference example of the present invention.
FIG. 2 is a diagram illustrating the configuration of an embodiment of the present invention.
FIG. 3 is a cross-sectional configuration diagram of still another embodiment of the present invention.
[Explanation of symbols]
1: base (printed circuit board), 2: operation panel, 3: rubber switch, 4: actuator, 5: driven part, 6: first prone part, 7: mouth part, 8: second prone part, 9 : First movable contact, 10: second movable contact, 11: first fixed contact, 12: second fixed contact, 13: fixed support portion, 14: movable contact forming surface, 19: reaction force member.

Claims (2)

It has a driven portion for receiving a pressing force from the actuator provided in the key to rotate about the single pivot point, the driven unit by receiving the pressing force, a plurality of the middle key depression of the key A contact device for an electronic keyboard instrument in which movable contacts make up sequentially with a time difference with respect to a corresponding fixed contact,
A first prone part integral with the driven part, a second prone part integrally formed on the outer periphery of the mouth of the first prone part, and an outer periphery of the second prone part. A fixed support member for connecting and fixing the second prone portion to the surface on which the fixed pattern is formed, and the plurality of movable contacts are provided at the mouth portion of the first prone portion,
The plurality of movable contacts are formed in the same plane,
The same surface is parallel to the surface on which the fixed contact is patterned, and applies a pressing force to the driven portion from an oblique direction to the surface,
The actuator has an inclined contact surface with respect to the driven portion, and the contact surface contacts the driven portion before the movable contact and the fixed contact make up, and the contact surface is in contact with the driven portion. A contact device for an electronic keyboard instrument , wherein the movable contact is driven by being pushed down from an oblique direction so that an inclination angle of the electronic keyboard gradually increases in a certain direction. An electronic keyboard instrument contact device having a driven portion that receives a pressing force, wherein the driven portion receives the pressing force so that a plurality of movable contacts make up sequentially with respect to corresponding fixed contacts with a time difference. ,
The first prone portion has a reaction force member that is integral with the first prone portion and projects downward from the mouth , and the reaction force member is not pressed or when the driven portion is not pressed. In addition to the reaction force due to the elastic deformation of the first and second prone portions, the fixed contact is in contact with the surface on which the pattern is formed before the first movable contact contacts the fixed contact after pressing. The contact device for an electronic keyboard instrument according to claim 1, wherein a reaction force against a pressing force is increased .

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