JPH0521795Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a switch, particularly a joystick type switch.

<Prior Art> For example, in a switch that drives a barber's seat back and forth and up and down, multiple microswitches corresponding to each drive device are assembled into a single frame, and the switches are swingably supported by the same frame. By tilting the shaft, the desired push button of the micro switch is turned on depending on the direction of the tilt. A so-called joystick type is used.

FIG. 5 shows a conventional example of this type of switch. In the figure, a frame 1 has a shaft 2 which is swingably supported on its lower surface.
microswitches 3 (three microswitches are shown in the figure) are installed.
Each micro switch 3 has an on/off push button 32 provided on the case 31 so as to be freely retractable from the shaft 2.
The micro switch 3 is arranged to face the shaft 2, and the micro switch 3 is turned on depending on the direction in which the shaft 2 is tilted. That is, the shaft 2 has its base end 21 supported by the shaft support fitting 4 installed on the pillars 11 and 12 of the frame 1, and the operating part 22 on the swinging end side.
is projected upward from a large hole 13 provided in the frame 1 via a flange 23. Furthermore, by attaching the coil spring 5 for returning to the neutral position to the base end 21, the shaft 5 is located in the hole 13 of the frame 1 and is freely tilted toward each micro switch 3 against the biasing force of the coil spring 5. At the same time, the structure is such that when the user releases the operating portion 22, the device returns to the neutral position.

<<Problems to be solved by the invention>> However, in the conventional structure described above, since the shaft 5 is also urged upward by the coil spring 5, friction occurs between the flange 23 and the frame 1. When this frictional resistance becomes larger than the return force of the coil spring 5, there is a problem in that the shaft 5 cannot return to the normal neutral position. Conventionally, in order to solve this problem, grease or the like is applied to the flange 23 to eliminate the frictional resistance. This lacked reliability, and a more effective measure was desired.

The present invention was developed in view of the above-mentioned circumstances, and an object of the present invention is to provide a switch of this type that can improve the reliability of on/off operations.

<Means for Solving the Problems> In order to achieve the above object, the present invention tilts a shaft swingably supported by a frame from a neutral position, It is a switch that is turned on by pressing the push button of the micro switch corresponding to the tilting direction of the micro switches, and a leaf spring for returning the shaft to a neutral position is attached to each of the micro switches. One end of the attachment part to the micro switch is bent into a substantially L-shape, and the bent part is further bent to provide an integrally raised part so that the tip of the raised part is located approximately at the center of the shaft. It is characterized by being in contact with each other.

<<Operation>> Therefore, the shaft is held at the neutral position by the neutral position return leaf spring provided on each microswitch, and is reliably returned to the neutral position from each tilted position.

<<Embodiment>> FIG. 1 is a partial sectional view showing a joystick type switch according to the present invention, FIG. 2 is a bottom view of the switch, and FIG. 3 is a top view of the switch.

In addition, in these figures, the same parts as in the conventional example are given the same reference numerals and explained. The switch includes a shaft 2 swingably supported by a frame 1,
Four micro switches 3 are attached to the lower surface of the frame 1 around the axis of the shaft 2, and a coil spring 5 is attached to the base end 21 of the shaft 2.
and a neutral position return spring 6 provided on each microswitch 31.

The shaft 2 is integrally provided with a flange 23 on the swinging end side, and the upper part of the flange 23 is connected to the operation part 22.
It is becoming. The shaft 2 is connected to the operating section 2 through a large hole 13 provided approximately in the center of the frame 1.
2 to protrude to the upper surface side, and in this state, the base end 21 is inserted into the support column 1 provided on the lower surface side of the frame 1.
It is attached by being supported by a shaft receiving metal fitting 4 installed on the shaft support fittings 1 and 12. In other words, a rectangular through groove 41 is provided approximately at the center of the shaft receiving fitting 4, and by loosely fitting the base end 21 of the shaft into this through groove 41, the shaft 1 is supported on the lower surface side of the frame 1. At the same time, it is swung along the front and rear and left and right recesses (see FIG. 3) provided on the periphery of the hole 13. Further, a coil spring 5 is attached to the base end portion 21. The coil spring 5 biases the shaft 2 upward to eliminate looseness, and also functions to return the shaft 2 to a neutral position.

Further, as shown in FIG. 4, the micro switch 3 has a pair of fixed terminals 33, 33 protruding from the lower part of the case 31, and an on/off push button provided on the side so as to be retractable. 32, and is attached to a holding piece 14 provided on the lower surface side of the frame 1 and around the axis of the shaft 2. Further, a leaf spring for returning the shaft 2 to a neutral position is attached to each microswitch 3. This leaf spring 6 has one end of the mounting portion 61 approximately L.
It is bent into a letter shape, and the tip of the bend is further bent to provide an integrally raised part 62. By fixing the mounting part 61 to one side of the micro switch 3 with a tapping screw 7, it can be raised up. The tip of the portion 62 is located at the lower part of the push button 32, is set to protrude slightly from the push button 32, and is in contact with approximately the center of the shaft 2.

According to such a switch configuration, the operation section 22
By tilting the micro switch 3 against the spring pressure of the leaf spring 6, the push button 32 of the micro switch 3 corresponding to the tilting direction is pressed and turned on, and the operating section 2 is turned on.
When the shaft 2 is released, the tilted shaft 2 returns to the neutral position by the restoring force of the leaf spring 6, and the micro switch 3 is turned off. In other words, the shaft 2 can be reliably returned to the neutral position by the leaf spring 6 provided on each microswitch.
Of course, in this case, it is difficult for the shaft 2 to return to the neutral position due to the frictional resistance caused by the flange 23 being pressed against the frame 11 by the coil spring 5, but such frictional resistance is 6
It is small compared to the restoring force of , and is sufficiently absorbed by the leaf spring 6.

<<Effects of the invention>> As explained above in the embodiments, according to the invention, the shaft is held at the neutral position by the neutral position return plate spring provided in each micro switch, and the shaft is maintained at each tilting position. Since the switch is reliably returned to the neutral position from the switch, the reliability of on/off operations can be greatly improved.Moreover, the leaf spring for returning to the neutral position can be sub-assembled in advance by attaching its mounting part to each micro switch. If this micro switch is installed around the axis of the shaft, the leaf spring for returning to the neutral position can be easily and reliably positioned and assembled at a predetermined position, resulting in excellent assembly. The upright part of the position return leaf spring is configured so that its tip touches approximately the center of the shaft, so the amount of deflection due to shaft operation is small, and combined with the fact that it is a leaf spring, the return force is reduced. It has the following effects: it has excellent durability against breakage, etc.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of a switch shown as an embodiment of the present invention, Fig. 2 is a bottom view of the switch, Fig. 3 is a top view of the switch, and Fig. 4 is a perspective view showing a micro switch. FIG. 5 is a partially sectional front view of a switch shown as a conventional example. 1... Frame, 2... Shaft, 3... Micro switch, 32... Push button, 6... Neutral position return leaf spring.

Claims (1)

[Scope of utility model registration request] A switch that is turned on by tilting a shaft that is swingably supported by a frame from a neutral position and pressing the push button of the micro switch that corresponds to the direction of the tilt among multiple micro switches installed around the axis of the shaft. A shaft neutral position return leaf spring is attached to each of the microswitches, and one end of the attachment portion of the shaft neutral position return leaf spring to the microswitch is bent into a substantially L-shape; The switch further comprises an upright part formed by bending the bent part so that the tip of the upright part comes into contact with substantially the center of the shaft.