JPH0355219Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a switch device.

(Prior Art) Conventionally, a lever made of an elastic material is driven by the forward and backward movement of an operating rod that is reciprocatably guided in a case that stores and fixes a push button switch, thereby protruding and retracting from one side wall of the push button switch. For example, there is a switch device shown in FIG. 6, which operates a push button that is disposed so as to turn on and off a contact mechanism inside the push button switch.

In FIG. 6, 1 is a push button switch, 2
is a push button disposed on one side wall 1a of the push button switch 1 so as to be retractable. Reference numeral 3 denotes a case for storing and fixing the push button switch 1, and the case 3 includes a first case member 4 to which the push button switch 1 is fixed, and an operating rod 6 connected to the first case member 4 at one end.
a second guide groove 5a that reciprocally guides the
It consists of a case member 5. A convex portion 7 is formed in the middle portion of the operating rod 6 so as to protrude toward the push button switch 1 side.

Reference numeral 8 denotes a bent lever made of an elastic material, one end of which is fixed to the push button switch 1, and the free end of which is brought into contact with a stopper 9 provided on the first case member 4. The intermediate portion of the lever 8 is structured to protrude toward the rod 6 so as to engage and disengage the convex portion 7 as the operating rod 6 moves forward and backward.

In this switch device, when the operating rod 6 is operated leftward (forward operation) from the position shown in FIG. Since the lever 8 is elastically deformed, the free end side of the lever 8 is separated from the stopper 9 and pressed against the push button 2.
is pressed in the retracting direction to turn on or off a contact mechanism (not shown) inside the push button switch 1, and when the contact mechanism is in the on or off state, when the operating rod 6 is operated to the right (return operation),
Since the intermediate portion of the lever 8 is not engaged with the convex portion 7, the elastic deformation of the intermediate portion is released, and the free end side of the lever 8 is separated from the push button 2, turning the contact mechanism off or on, and then engaging the stopper 9 again. come into contact with

(Problem to be Solved by the Invention) However, in the above-mentioned switch device, especially when the intermediate portion of the lever 8 is not engaged with the convex portion 7 of the operating rod 6, shocks or vibrations may be applied to the switch device. When applied, the free end side and middle part of the lever 8 vibrate, and as a result, a loud hitting sound is generated between the free end side of the lever 8 and the stopper 9, and between the middle part of the lever 8 and the operating rod 6. In addition, there is a problem in that, in some cases, the push button 2 is pressed by the free end side of the lever 8, causing a malfunction such as momentarily turning the contact mechanism on or off.

The present invention was developed by focusing on the above-mentioned problems with the conventional technology, and aims to provide a switch device that produces a small lever tapping sound and that does not cause malfunction of the contact mechanism even when subjected to shock or vibration. is intended to provide.

(Means for Solving the Problems) The configuration of the switch device according to the present invention is such that a lever made of an elastic material is operated by forward and backward movement of an operating rod that is guided in a reciprocating manner in a case that houses and fixes a push button switch. In a switch device that is driven to operate a push button retractably disposed on one side wall of the push button switch to turn on and off a contact mechanism inside the push button switch, the lever has a hinge portion formed at one end thereof. the lever is rotatably supported on the case, and the free end side of the lever is brought into contact with a stopper provided on the case;
The lever is formed with a protruding piece that protrudes toward the push button switch and abuts the one side wall, and the protruding piece that abuts the one side wall and the stopper, respectively, and the free end side of the lever are elastically deformed in a direction toward each other. The lever is characterized in that the lever is always held at a predetermined preload by the restoring force acting on these protruding pieces and the free end side of the lever.

(Embodiment) Hereinafter, a switch device according to the present invention will be explained based on an embodiment shown in FIGS. 1 to 5.

1 to 4, 11 is a push button switch, and 12, 12 are push buttons that are retractably disposed on one side wall 11a of the push button switch 11 having a step.

Reference numeral 13 denotes a case for housing and fixing the push button switch 11, and includes a first case member 14 to which the push button switch 11 is fixed with a screw 21 and a nut 22, and a case 13 that is engaged with the first case member 14 and has one end (as shown in FIG. 1). The second case member 15 has a guide groove 15a having a U-shaped cross section on its lower end side for reciprocatingly guiding the operating rod 16. Protrusions 15 are provided on the pair of side walls 15b, 15c of the second case member 15 at openings 14d, 14d formed on the pair of opposing side walls 14b, 14c of the first case member 14, respectively.
d and 15d, and the guide groove 1 is engaged by the protrusion 14a provided on the first case member 14.
The opening end of 5a is closed (see FIG. 3) to connect the first case member 14 and the second case member 15.

The operating rod 16 has a convex portion 17 in the middle thereof that protrudes toward the push button switch 11 side.
The guide groove 15a provided at one end of the second case member 15 is provided with a notch 15e for preventing interference with the convex portion 17.
As shown in FIG.
It is possible to reciprocate within a stroke range in which it comes into contact with both end surfaces 15f and 15g of 5e.

18 is a bent lever made of elastic material;
An arcuate hinge portion 18a is formed on one end side of the
The lever 18 is rotatably supported by the first case member 14, that is, the case 13, by engaging the hinge portion 18a with a cylindrical projection 14e provided upright on the first case member 14. The free end side thereof is brought into contact with a stopper 19 provided integrally with the first case member 14. Further, a protruding piece 18b is formed near the hinge portion 18a of the lever 18 by cutting and bending the lever 18 so as to protrude toward the push button switch 11 and abut against the one side wall 11a. This lever 18 is assembled by elastically deforming the free end side of the lever 18 and the protruding piece 18b that abuts the one side wall 11a and the stopper 19, respectively, in a direction in which these protruding pieces 18b approach each other. A restoring force acts on the free end sides of the lever 18 in the direction of separating them from each other, and the lever 18 is always held with a predetermined preload. Incidentally, the intermediate portion of the lever 18 is moved by the convex portion 1 by the forward and backward movement of the operating rod 16.
The rod 16 has a structure that protrudes toward the rod 16 so that the rod 7 is engaged or disengaged.

This switch device having the above-mentioned structure operates the operating rod 16 in the left direction from the position shown in FIG. (Reciprocating operation) Then, the intermediate part of the lever 18 begins to engage with the other rising part 17b of the convex part 17 formed on the inclined surface, and the intermediate part gradually elastically deforms toward the push button switch 11 side, so that the lever 18 The free end side of the push button 12 is moved away from the stopper 19 and pressed in the retracting direction, and a contact mechanism (not shown) inside the push button switch 11 is turned on or off just before the middle part of the lever 18 reaches the upper surface of the convex part 17. , the operating rod 16 is connected to the rising portion 17b as shown in FIG.
stops when it comes into contact with the other end surface 15g of the notch 15e. Next, when the operating rod 16 is operated rightward from the position shown in FIG. 5 (return operation), the intermediate portion of the lever 18 shifts from engagement with the upper surface of the convex portion 17 to engagement with the rising portion 17b. However, since the elastic deformation of the intermediate portion is gradually released, the lever 18
The free end of the lever is moved in the direction approaching the stopper 19 to project the push button 12 and turn the contact mechanism off or on, and as shown in FIG.
6, the rising portion 17a is the end surface 15 of the notch portion 15e.
It stops when it touches f.

That is, by moving the operating rod 16 forward and backward, the lever 18 made of an elastic material is actuated to operate the push button 12, which is retractably disposed on one side wall 11a of the push button switch 11, and the contacts inside the push button switch 11 are activated. The mechanism can be turned on and off.

The lever 18 includes a protruding piece 18b that abuts one side wall 11a and a stopper 19, respectively, and the lever 18.
The protruding piece 18b and the free end side of the lever 18 are elastically deformed in the direction toward each other, and a restoring force acts on the protruding piece 18b and the free end side of the lever 18 in the direction of separating them from each other, so that the lever 18 is always held in a predetermined position. Since the lever 18 is held with a preload of Therefore, the tapping sound generated between the free end side of the lever 18 and the stopper 19 and between the intermediate part of the lever 18 and the operating rod 16 is extremely small, and
If the lever is located on the free end side of the lever 18 and is pressed, causing the contact mechanism to turn on or off momentarily, no malfunction will occur.

(Effects of the invention) As explained above, according to the switch device according to the present invention, the lever is always held at a predetermined preload, so even if the switch device is subjected to impact or vibration, the tapping sound of the lever is very small. In addition to this, it also has the excellent effect of preventing the contact mechanism from momentarily malfunctioning.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the switch device according to the present invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, FIG. FIG. 5 is a longitudinal cross-sectional view similar to FIG. 1 showing the operating state of the present invention, and FIG. 6 is a longitudinal cross-sectional view of a conventional example. 1, 11...Push button switch, 1a, 11a...
One side wall, 2, 12... push button, 3, 13... case, 6, 16... operating rod, 8, 18... lever, 18a... hinge part, 18b... projecting piece,
9,19...stoppa.

Claims (1)

[Scope of utility model registration request] A lever made of an elastic material is driven by the forward and backward movement of an operating rod that is guided in a reciprocating manner in a case that stores and fixes the push button switch, and a push button that is retractably disposed on one side wall of the push button switch is driven. Activate it, turn on the contact mechanism inside the push button switch,
In the switch device for turning off the switch, the lever has a hinge portion formed at one end thereof to rotatably support the lever on the case, and the free end side of the lever abuts a stopper provided on the case. and the lever is provided with a protruding piece that protrudes toward the push button switch and abuts the one side wall, and the protruding piece that abuts the one side wall and the stopper, respectively, and the free end side of the lever are moved in a direction toward each other. A switch device characterized in that the lever is always held at a predetermined preload by elastic deformation and restoring force acting on the protruding pieces and the free end side of the lever.