JPS6215941Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a momentary action type push button switch particularly suitable for use in an automobile tailgate opener.

In addition to opening the tailgate of a car directly by hand, some tailgates can be opened by operating a switch from the driver's seat to pull out the stopper. When operated by a switch, closing the switch excites the solenoid and releases the stopper, but the conventional switch used for this purpose is a normal type in which the joint that presses the push button is closed. It is a push button switch. Therefore,
In the past, when the tailgate did not open due to some kind of binding, or even when it opened smoothly, the push button was held down for a long time, which caused current to be applied to the solenoid, which was originally rated for a short time, for a long time. This caused the solenoid to burn out and cause an accident.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a momentary action type push-button switch in which the contact closes only for a short period of time even if the button of the push-button switch is continuously pressed.

According to the present invention, this purpose is achieved by pushing the push button against its return spring, so that the movable contact provided on the support on the push button side via the contact spring comes into contact with each of the fixed contacts of the pair. The movable contact is tiltably supported with respect to the support part, and a locking part is provided to lock one end of the movable contact to the push button side. , when the push button is pushed to a certain level, the movable contact short-circuits between the pair of fixed contacts, and when the push button is pushed beyond a certain level, the movable contact connects to the point of contact with one of the fixed contacts as a fulcrum. This is achieved by locking one end of the movable contact to a locking portion such that the movable contact is tilted and separated from the other fixed contact.

If such a push button switch is used, even if the push button is kept pressed, it will only turn on momentarily, and one end of the movable contact at the locking part will be released from the restraint not only during push operation but also when the push button returns. In order for the movable contact to short-circuit a pair of fixed contacts using a contact spring, and then to separate from each fixed contact, a single push operation of pressing and releasing a push button will cause the movable contact to short-circuit between a pair of fixed contacts, and then to release the push button. The short-time excitation of the solenoid can be repeated twice by turning it on momentarily once. Therefore, it is possible to prevent the solenoid from burning out, and even if the tailgate fails to open the first time with a single push button operation,
By automatically turning off and re-energizing, the chances of success will automatically increase.

The present invention will now be described in more detail with reference to the drawings.

1 to 3 show an embodiment of the instantaneous type push button switch according to the present invention. In addition, in the following explanation, expressions such as top and bottom will be given based on the upward direction shown in the illustration, but in actual use, it may be oriented horizontally by rotating 90 degrees from the direction shown in the illustration, or depending on the case, Please note that it is also possible to have it rotated 180 degrees and facing downwards.

In the figure, reference numeral 2 denotes a casing made of an insulating material, for example, plastic, and a pair of stationary contacts 4 and 5 are fixed to the bottom of the casing so as to protrude through the bottom. A hole 3 is formed in the upper surface of the casing 2, and a push button 6 is exposed to the outside through the hole 3. The push button 6 has a structure in which it expands outward to a larger extent than the hole 3 inside the casing 2 to prevent it from slipping out, and has side wall portions 11 and 12 that hang further downward from the expanded portions 9 and 10. Ori,
Return springs 13 and 14 are interposed between the side walls 11 and 12 and the inner bottom surface of the casing 2. A movable contact support part 7 is further attached to the center of the push button 6, and a movable contact 16 is provided so as to be pressed by a contact spring 15 toward a stopper 8 formed at the tip thereof. The movable contact 16 has a slightly larger hole through which the movable contact supporting portion 7 is inserted, so that it can be tilted to some extent by moving against the spring force of the contact spring 15. The movable contact 16 is pushed down by pressing the push button 6 against the spring force of the return springs 13 and 14 and comes into contact with the fixed contacts 4 and 5, and both fixed contacts 4,
5 can be closed.

One end of the movable contact 16 extends relatively far beyond the fixed contact 5, and its tip reaches the side wall 12 of the casing. Correspondingly, a locking stepped portion 12a is formed on the side wall portion 12.

FIG. 1 shows the state when the push button 6 is not pressed, and the push button 6 and the movable contact 16 supported by it are lifted upward by the spring force of the return springs 13 and 14, and are movable. contact 16
is away from both fixed contacts 4 and 5, and therefore the fixed contacts 4 and 5 are in an open (off) state.

FIG. 2 shows the spring force of the return springs 13, 14 when the push button 6 is pressed to a certain level at which the movable contact 16 contacts both the fixed contacts 4, 5 and turns them closed (on). This shows the state when the button is pressed against the pressure.

FIG. 3 shows the state when the push button 6 is pushed further. In this case, in a state where the movable contact 16 is already in contact with the fixed contacts 4 and 5, the movable contact 16 touches the locking stepped portion 12 of the side wall 12 at the end on the fixed contact 5 side.
a and is forcibly pushed downward. Therefore, the movable contact 16 rotates in a seesaw shape as shown in the figure against the spring force of the contact spring 15 using the tip of the fixed contact 5 as a fulcrum, and the movable contact 16
will now open on the fixed contact 4 side, and the connection between both fixed contacts 4 and 5 will be turned off.

During the period from the OFF state shown in FIG. 1 to the OFF state shown in FIG. 3 due to the pushing operation of the push button 6, the ON state shown in FIG. You will get it.

When the push button 6 is released, contrary to the above-described push operation, the switch momentarily goes from the OFF state shown in FIG. 3 to the ON state shown in FIG. 2 and returns to the OFF state shown in FIG. 1.

As can be seen from the above explanation, the instantaneous type push button switch of the present invention performs off/on/off/on/off opening/closing by pushing and releasing the switch in the same way as a normal push button switch, and it remains in the on state. is instantaneous. Therefore, if this is used to excite the solenoid, the solenoid will not be energized for a long period of time due to being in the on state while the push button is held down, as is the case in the past.
Burnout of the solenoid can be prevented, and the solenoid can be energized twice with a single push operation. For example, when the bonnet of a car gets caught, the failure of the first energization to automatically open the bonnet can be prevented by the second energization. It is also possible to achieve success by excitation.

In the above example, the tailgate of a car was used as the object of solenoid operation, but the present invention is not limited to that, and can be applied to other equipment or equipment as long as it is operated by instantaneous excitation of the solenoid. It is applicable.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are longitudinal cross-sectional views showing different opening and closing states of an embodiment of the instantaneous type push button switch according to the present invention. 2... Casing made of insulating material, 4, 5... Fixed contact, 6... Push button, 12... Side wall portion, 12a...
Locking stepped portion, 13, 14... Return spring, 15...
Contact spring, 16...movable contactor.

Claims (1)

[Scope of utility model registration request] When the push button is operated against its return spring, a movable contact that is slidably provided on the support portion on the push button side via a contact spring exerts contact pressure with each of the fixed contacts of the pair due to the contact spring. In the push button switch, the movable contact is supported so as to be tiltable relative to the support part, and one end of the movable contact is extended to short-circuit between the fixed contacts. One end is locked to the side wall provided on the push button side, and when the push button is pushed to a certain level, the movable contact shorts between the pair of fixed contacts, and when the push button is pushed beyond a certain level, the side wall When the extended end of the movable contact is pushed, the movable contact tilts using the point of contact with one fixed contact as a fulcrum and separates from the other fixed contact. Instantaneous push button switch.