JPS6333455Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shaft sliding device that uses an O-ring to seal the shaft sliding portion.

If this type of mechanism is left unused for a long period of time, the O-ring may become stuck to the shaft, making it difficult for the shaft to move. Especially in areas where the shaft receives spring force and starts sliding when the cam etc. escapes.
Moreover, this is especially likely to occur if the spring force is weak.
Functions often stopped working.

The present invention aims to eliminate such difficulties.
This will be explained in detail with reference to the drawings, using an ignition switch operating device for a gas appliance as an example of use. Reference numeral 1 denotes a gas valve mechanism body having a pilot gas valve, a main gas valve, etc. therein, which is opened and closed by an operating shaft 2. Reference numeral 3 denotes an ignition switch such as a micro switch placed outside the main body 1 of the mechanism. Reference numeral 4 denotes a shaft for opening and closing the switch 3, which passes through the main body 1 and has one end facing the switch 3 and the other end facing a shaft pressing body 5 such as a cam provided on the operating shaft 2. An O-ring 7 for sealing is fitted into the shaft sliding portion 6. Reference numeral 8 denotes a spring that constantly urges the shaft 4 in the direction of the shaft pressing body 5. Note that the switch 3 is of a normally closed type. Reference numeral 9 denotes a pressing portion of a shaft pressing member 5 that presses the shaft 4 against the force of the spring 8 to open the switch 3 when the mechanism is not in use; A pressure release part 11 is a shaft forced activation part interposed between the pressure part 9 and the pressure release part 10, which slightly presses and slides the shaft 4 in the opposite direction to the operating direction by the force of the spring 8. In the illustrated example, it is formed in the shape of a protrusion.

In the above configuration, when the operation shaft 2 is operated from a stopped state, at the time of starting, the shaft forced activation section 11 once pushes the shaft 4 slightly in the opposite direction, and then the shaft 4 is released from the pressure 10.
As the shaft 4 slides away from the switch 3 due to the force of the spring 8, the switch 3 closes and an ignition spark discharge is generated.

Thus, when the shaft 4 is pressed in the direction opposite to the operating direction by the shaft forced activation section 11, the sticking between the O-ring 7 and the shaft 4 is removed.

In this way, the present invention eliminates pressure on the shaft in a shaft sliding device that uses an O-ring to seal the shaft sliding part, and in which the shaft starts sliding when the state of pressure on the shaft is released. It has a shaft forced activation part that slightly presses the shaft in the opposite direction to the sliding direction before releasing, which can remove the O-ring from sticking to the shaft each time it is operated, ensuring operation. It has a calming effect.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an explanatory view showing a stopped state, FIG. 2 a shaft forced start state, and FIG. 3 a shaft operating state. 4...Shaft, 6...Shaft sliding part, 7...O-ring,
11... Axis forced activation section.

Claims (1)

[Scope of utility model registration request] In products where an O-ring is used to seal the shaft sliding part, and the shaft starts sliding when the pressure on the shaft is released, the shaft should be moved in the sliding direction before the pressure on the shaft is released. A shaft sliding device characterized in that it has a shaft forced activation part that slightly presses the shaft in the opposite direction.