JP2005251625A - Switch mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To freely set an operating force and a displacement amount when operating a switch to desired values and almost prevent the generation of sounds at the time of operation and restoration. <P>SOLUTION: This momentary switch is constructed so that a detection switch 3 is mounted on a substrate 1 and a housing 8 provided with displacement portions 7a and 7b each having a click rubber 6 of rubber based member putted between a base 4 and a top 5 of rubber based member at upper two positions is disposed above the substrate 1. In this switch, a switch knob 9 of synthetic resin member formed in a nearly U-shaped is disposed to cover the housing 8 from an upper part of housing 8, and a rotation shaft 10 is provided to project from both side views, an opening portion 11 is formed at end portions of both sides and a lever 2 of the detection switch 3 is inserted into the opening portion 11. Further, projecting portions 13a and 13b are provided at two positions on an upper inner surface of the switch knob 9 to face to tops 5 on the click rubbers 6 provided at two positions on the housing 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a switch mechanism, and more particularly to a switch mechanism of a switch used for in-vehicle equipment and consumer equipment.

  The mechanism and operation of a conventional switch are shown in “FIG. 4-a” to “FIG. 4-c”. First, as shown in FIG. 4A, the basic mechanism and operation are mounted on the substrate 33 with two tact switches 32a and 32b that are turned OFF and ON by the vertical displacement of the stems 31a and 31b. The rotation of the switch knob 35 having the rotation shaft 34 around the rotation shaft 34 is converted into a linear motion via the movable pins 36a and 36b, and the tact switches 32a and 32b are converted by the linear motion of the movable pins 36a and 36b. A load is applied to the stems 31a and 31b to displace the stems 31a and 31b to actuate (turn on) the tact switches 32a and 32b.

  This will be described in more detail. A housing having two through holes 37 in which two tact switches 32a and 32b are mounted on the substrate 33, and two movable pins 36a and 36b are disposed above the tact switches 32a and 32b. 38, each end of the movable pins 36a, 36b is in contact with the stems 31a, 31b at the top of the tact switches 32a, 32b.

  Further, the other end portions 40a and 40b of the movable pins 36a and 36b are two projecting portions 41a formed on the switch knob 35 having the rotating shaft 34 disposed between the two movable pins 36a and 36b. , 41b. The whole is surrounded by the substrate 33 and the panel 42 having the opening 43, and the switch knob 35 is partially exposed by the opening 43 of the panel 42 from the opposite direction of the protrusions 41a and 41b.

  Such a state indicates an initial state in the switch 50, and both the tact switches 32a and 32b are in an OFF state since the loads by the movable pins 36a and 36b are not applied to the both tact switches 32a and 32b.

  Therefore, as shown in FIG. 4B, when the switch knob 35 is rotated and held in the direction of the arrow so that a load greater than the pressure at which the tact switch 32a operates is applied to the tact switch 32a, the switch knob 35 is turned. A load is applied to the movable pin 36a in the rotational direction by the projecting portion 41a in the moving direction, and the stem 31a of the tact switch 32a is pushed down to turn on the tact switch 32a. On the other hand, the movable pin 36b in the direction opposite to the rotation direction is free because the projecting portion 41b of the switch knob 35 is separated from the end 40b of the movable pin 36b, and a tactile switch 32b is turned off. Will keep.

  Next, as shown in FIG. 4-c, when the force applied to hold the switch knob 35 is removed, the load applied to the tact switch 32a disappears, and the restoring force causes the movable pin to move. 36a is pushed upward, the switch knob 35 is rotated in the direction of the arrow to return to the initial state, and both the tact switches 32a and 32b return to the initial state OFF.

When the switch knob is rotated in the direction opposite to the above-described direction, the two tact switches are turned on and off in the opposite directions during the rotation holding, and return to the initial state when the rotation holding is released. . As described above, a switch that maintains a predetermined ON or OFF state only while the switch knob is operated and returns to the initial state when the operation is canceled is called a momentary switch.
JP 2002-208329 A

  However, in the conventional momentary switch described above, the operating force and displacement (stroke) for rotating the switch knob largely depend on the operating force and displacement (stroke) of the tact switch. The degree of freedom will be greatly limited.

  Further, since the movable pin in the direction opposite to the rotation direction is in a free state during the rotation holding of the switch knob, noise such as vibration noise may be generated due to some external stress or vibration.

  Further, when the rotation of the switch knob is released, the switch knob is rotated in the opposite direction by the restoring force of the tact switch, and a load is instantaneously applied to the free movable pin through the protrusion of the switch knob. At this time, if the switch knob, the movable pin, and the tact switch stem are formed of a synthetic resin member, the switch knob and the end of the movable pin and the end of the movable pin and the tact switch stem A loud striking sound is generated between the two, which can be annoying and uncomfortable. In order to reduce the impact sound, it is conceivable to employ a dedicated part such as a cushion for cushioning. However, an increase in the number of parts and the number of manufacturing steps increases the manufacturing cost.

  Therefore, the present invention was devised in view of the above problems, and the object of the present invention is to provide a large degree of freedom in design of the operating force and displacement (stroke) of the switch knob, during operation and when restoring to the initial state. It is an object of the present invention to provide a switch that generates less noise.

  In order to solve the above-mentioned problems, the invention described in claim 1 of the present invention includes a plurality of elastic displacement portions arranged at predetermined intervals, a detection switch, an operation portion for operating the detection switch, and a rotating shaft. And a support mechanism that rotatably supports the rotation shaft, wherein the operation portion has a rotation operation force in a desired direction with the rotation shaft as a fulcrum. In addition, the operation portion pushes and contracts the elastic displacement portion to rotate the operation portion, and the operation portion provided in the operation portion rotates about the rotation shaft to turn the detection switch. It is characterized by operating.

  Further, the invention described in claim 2 of the present invention is that the switch mechanism described in claim 1 is a momentary system that returns to the initial state by removing the rotational operation force applied to the operation unit. It is a feature.

  The invention described in claim 3 of the present invention is characterized in that, in any one of claims 1 and 2, part or all of the elastic displacement portion is made of a rubber member.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the detection switch has an operating lever, and the operating portion provided in the operating portion is open. And an operation lever of the detection switch is located in the opening.

  It was possible to realize a momentary switch that can freely set the operation force and the displacement amount when operating the switch to desired values and hardly generate sound during operation and rebound.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3 (the same parts are denoted by the same reference numerals). The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. Unless stated to the effect, the present invention is not limited to these embodiments.

  "FIG. 1-a" and "FIG. 1-b" show the initial state of the switch of the present invention, "FIG. 1-a" is a schematic sectional view, and "FIG. 1-b" is "FIG. 1-a". It is a schematic perspective view which shows the state which removed the panel from "." "FIG. 2-a" and "FIG. 2-b" show the state in which the switch of the present invention is changed from the initial state to the operating state. "FIG. 2-a" is a schematic sectional view. "Is a schematic perspective view which shows the state which removed the panel from" FIG. 2-a. " FIG. 3 is a schematic cross-sectional view showing a state in which the switch of the present invention returns from the operating state to the initial state, with the panel removed.

  The switch of the present invention is a momentary switch, and its configuration is such that detection is performed on the substrate 1 by a lever 2 such as a toggle switch or a slide switch as shown in FIG. 1A and FIG. 1B. A switch 3 is mounted. Further, the detection switch 3 is exposed above the substrate 1, and a click rubber 6 made of a rubber member is sandwiched between a base 4 and a top 5 made of a rubber member in two upper portions. A housing 8 provided with displacement portions 7a and 7b is arranged.

  A switch knob 9 made of a synthetic resin member formed in a substantially U-shape is disposed so as to cover the housing 8 from above the housing 8. The switch knob 9 is provided with a rotating shaft 10 so as to protrude from both side surfaces, an opening 11 is formed at the end of the side surface, and the lever 2 of the detection switch 3 is inserted into the opening 11. Although not shown, the rotation shaft 10 penetrates through the panel 12 arranged so as to cover the whole, and is thus supported by the panel 12 so as to be rotatable.

  Further, two protrusions 13 a and 13 b are provided on the upper inner surface of the switch knob 9, and are in contact with the tops 5 on the two click rubbers 6 provided on the housing 8. A relatively large convex portion 14 is formed on the outer surface of the upper portion of the switch knob 9 as an operation portion so as to facilitate the switch operation.

  In the initial state of “FIG. 1A” and “FIG. 1B”, the switch having such a configuration includes two displacement portions 7a and 7b provided on the housing 8 and a protruding portion 13a of the switch knob 9. The contact pressure of the portion in contact with 13b is the same, and the lever 2 of the detection switch 3 at that time is located at the approximate center of the opening 11 of the switch knob 9 and is in the three positions of the lever 2 of the detection switch 3. The intermediate position is held.

  Next, as shown in "FIG. 2-a" and "FIG. 2-b", when a force is applied in the direction of the arrow by using the convex portion 14 of the operation portion of the switch knob 9, a displacement portion 7a positioned in the direction of the arrow. A load is applied to the top 5 by the protrusion 13a of the switch knob 9, the click rubber 6 is compressed, and the switch knob 9 is rotated in the direction of the arrow with the rotation shaft 10 as a fulcrum. Then, the opening 11 formed at the end of the switch knob 9 also rotates in the same direction as the rotation direction of the switch knob 9 with the rotation shaft 10 as a fulcrum. At that time, the lever 2 of the detection switch 3 is opened. Is snapped on one inner surface and held at one of the three positions. In addition, the top 5 of the displacement part 7b and the protrusion part 13b of the switch knob 9 which are located in the direction opposite to the rotation direction of the switch knob 9 will be in the state spaced apart.

  Next, when the turning force applied to the switch knob 9 is removed, as shown in FIG. 3, the switch knob 9 rotates in the direction of the arrow by the repulsive force of the click rubber 6 of the displacement portion 7a that has been compressed so far. The opening 11 of the switch knob 9 also moves in the same direction as the rotation direction of the switch knob 9 with the rotation shaft 10 as a fulcrum. At that time, the lever 2 of the detection switch 3 is snapped in the opposite direction on the other inner surface of the opening 11 of the switch knob 9 and returned to the intermediate position, returning to the initial state.

  At this time, the state in which the protruding portion 13b of the switch knob 9 and the top 5 of the displacement portion 7b are separated from each other instantaneously comes into contact again. However, although the protruding portion 13b is made of a synthetic resin member, since the top 5 and the click rubber 6 are made of a rubber-based member, even if the two members collide with each other, almost no impact sound is generated, and there is a concern of giving unpleasant noise. There is almost no.

  On the other hand, when the switch knob is rotated in the opposite direction, the opening of the detection switch is also rotated in the same direction by the same operation, and this time, the detection switch lever is snapped in the opposite direction so that it is in the three positions. It is held at the other end position. Thereafter, when the force holding the rotation is removed, the lever of the detection switch also returns to the intermediate position and returns to the initial state.

  The detection switch that is snapped by the opening formed at the end of the substantially U-shaped switch knob and can change the position of the lever may be provided at two ends of the switch knob, or at one end. It may be provided in one place.

  Here, the effect of the present invention will be described again. First, the operating force and displacement amount (stroke) of the switch knob for performing the switch operation are not determined by the operating force and displacement amount of the lever of the detection switch, but a load is applied by the protrusion provided on the switch knob. This is determined by the material and shape of the click rubber constituting the displacement portion. Therefore, even if an existing detection switch is used, a switch having a desired operating force and displacement amount can be realized by appropriately selecting the material of the click rubber and designing the shape.

  Also, during the rotation holding of the switch knob, the displacement part in the opposite direction of the rotation direction is fixed to the housing, so it does not become free, so there is some external stress and vibration. There is almost no possibility of noise such as vibration.

  Furthermore, when the rotation of the switch knob is released, the switch knob is rotated in the opposite direction by the restoring force of the clip rubber constituting the displacement portion, and a load is instantaneously applied to the displacement portion by the projection of the switch knob. . However, even if the switch knob is formed of a synthetic resin material at that time, the top 5 and the click rubber 6 constituting the displacement portion are made of rubber-based members, so that even when both members collide and contact, almost no impact sound is generated. There is almost no worry of giving off unpleasant noise. Naturally, it is not necessary to employ dedicated parts such as cushioning cushions for reducing the impact sound, and there is no increase in manufacturing cost due to an increase in the number of parts and manufacturing man-hours. There are many excellent effects.

It is a schematic sectional drawing which shows the initial state of embodiment of the switch of this invention. It is a schematic perspective view which shows the state which removed a part of "FIG. 1-a." It is a schematic sectional drawing when it will be in the operating state of embodiment of the switch of this invention. It is a schematic perspective view which shows the state which removed a part of "FIG. 2-a". It is a schematic sectional drawing when returning to the initial state of embodiment of the switch of this invention. It is a schematic sectional drawing which shows the initial state of the switch of a prior art example. It is a schematic sectional drawing when the switch of the conventional example will be in the operating state. It is a schematic sectional drawing when returning to the initial state of the switch of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Board | substrate 2 Lever 3 Detection switch 4 Base 5 Top 6 Click rubber 7a, 7b Displacement part 8 Housing 9 Switch knob 10 Rotating shaft 11 Opening part 12 Panel 13a, 13b Protrusion part 14 Convex part

Claims (4)

  A plurality of elastic displacement portions arranged at predetermined intervals, a detection switch, an operation portion for operating the detection switch and an operation portion having a rotation shaft, and a support body that rotatably supports the rotation shaft. A switch mechanism, wherein the operation unit applies a rotation operation force in a desired direction with the rotation axis as a fulcrum to rotate the operation unit. A switch mechanism, wherein the switch is actuated to actuate the detection switch by pivoting an actuating part provided in the operating part around the pivot shaft.   The switch mechanism according to claim 1, wherein the switch mechanism is a momentary system that returns to an initial state by removing a rotational operation force applied to the operation unit.   The switch mechanism according to claim 1, wherein a part or all of the elastic displacement portion is made of a rubber member.   2. The detection switch according to claim 1, wherein the detection switch includes an operation lever, and the operation unit provided in the operation unit includes an opening, and the operation lever of the detection switch is located in the opening. 4. The switch mechanism according to any one of 3 above.

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