JPS599174Y2 - Gas lighter injection valve - Google Patents

Description

[Detailed description of the invention] This invention is an injection valve for gas lighters that vents gas from the fuel tank of a lighter when fuel is injected, has a reliable opening/closing operation, and has a simple structure. Its purpose is to provide a valve.

This invention will be explained below with reference to the illustrated embodiment. The injection valve according to this invention consists of a cylindrical housing 1 and a movable valve 2.

The cylindrical housing 1 has a bottom wall 11, and a valve supporting wall 14 rising from the bottom wall 11 and protruding from the side wall 12 into the shaft hole 13 is integrally hollowed out of a soft elastic material such as rubber. It is something that

A center hole 15 is bored in the bottom wall 11, and a groove 16 is bored between adjacent valve support walls 14.

Next, the movable valve 2 is made of a hard material such as metal, and the movable valve 2 is provided with an upper collar 21 and a lower collar 22, and a waist portion 23 continues upward from the base end of the lower collar 22. A side hole 24 is bored in 23.

Next, with reference to FIGS. 2 and 3, the dimensional relationship that plays an important role in this invention will be described. , is larger than the distance a from the lower surface of the upper collar 21 of the movable valve 2 to the lower end of the constriction part 23, and the diameter d of the center hole 15
are each set larger than the diameter C of the constricted portion 23.

As can be seen from FIGS. 4 and 5, the movable valve 2 is inserted into the shaft hole 13 of the cylindrical housing 1, the upper part 21 is seated on the top surface of the valve supporting wall 14, and the constricted part 23 is inserted into the center hole 15. is inserted into the upper collar 21. of the movable valve 2, as shown in FIG. The valve branch wall 14 and the bottom wall 16 are sandwiched between the lower brim 22,
The center hole 15 is closed.

As described above, in order to insert the constricted portion 23 into the center hole 15, the movable valve 2 with the lower flange 22 facing downward is inserted into the cylindrical housing 1.
, and push the lower collar 22 into the center hole 15.

To attach this injection valve to the fuel tank wall of a lighter, the cylindrical housing 1 is inserted into a cylindrical cap (not shown) that is brazed to the fuel tank wall, and its peripheral surface is glued. The upper collar of the movable valve 2
The distance b from the top surface of the valve support wall 14, which is sandwiched between the upper rib 22 and the lower rib 22, to the lower surface of the bottom wall 11 is
Since the distance a from the lower surface of the lower collar 22 to the base end of the lower collar 22 is longer than the distance a from the lower surface of the lower collar 22, the upper surface of the lower collar 22 is closer to the bottom wall 1, as shown in FIG.
1, and the center hole 15 is completely sealed by the tightly attached portion.

Next, referring to FIG. 6, if the nozzle 3 of the supply container is applied to the head 25 of the movable valve and the movable valve 2 is pushed down, the movable valve 2 will be lowered and the space between the lower collar 22 and the bottom wall 11 will be lowered. A gap is created between the movable valve 2 and the pressurized gas fuel flowing down from the nozzle 3.
The fuel is injected into the fuel tank of the lighter through the shaft hole 26 and the side hole 24 of the constriction 23.

FIG. 6 shows the final state in which the movable valve 25 is pressed down, and at that time, the center hole 15 of the bottom wall 11 is elastically deformed due to the compression of the upper flange 21. Since the upper end is in close contact with the constriction 23 as shown in the figure, the passage upward through the center hole 15 is blocked, but immediately before the start of injection, which is an intermediate process leading to the final state described above, As shown in FIG. 7, the vicinity of the upper end of the center hole 15 of the bottom wall 11 is not yet in close contact with the constriction part 23, and therefore, the pressurized vaporized gas in the fuel tank of the lighter is released by the lowering of the movable valve 2. It passes through the created gap 17 between the lower flange 22 and the bottom wall 11 and the gap 18 between the constriction part 23 and the peripheral wall of the center hole 15, and then escapes outward through the groove 16 between the valve support walls 14. Therefore, the gas pressure in the fuel storage tank is reduced, making it easier to inject liquefied fuel.

Thus, according to this invention, the injection valve is composed of only two members, the cylindrical housing 1 and the movable valve 2, and its assembly is a simple task of simply pushing the movable valve 2 into the shaft hole of the cylindrical housing 1. Since it can be achieved in 100%, mass productivity is high and the production cost is low.

Although this injection valve has a simple structure as described above, the inside and outside of the valve are reliably sealed when not in use.
Furthermore, during use, the fuel can be reliably injected after the internal gas has been vented, and therefore, it has the advantage of being easy to fill, similar to high-end lighters that are equipped with a vent valve.

[Brief explanation of drawings]

Fig. 1 is a plan view of a cylindrical housing of an embodiment of the injection valve according to this invention, Fig. 2 is a axial cross-sectional view of the same, and Fig. 3 is a half-section of the axial cross-section taken at the central axis of the movable valve. 4 is a plan view of the embodiment, FIG. 5 is an axial sectional view, FIG. 6 is an axial sectional view during injection, and FIG. 7 is an axial sectional view during degassing. 1 is a cylinder housing, 11 is a bottom wall, 12 is a side wall, 13 is a shaft hole, 14
is the valve support body, 15 is the center hole, 16 is the split groove, 17.18 is the gap, 2 is the movable valve, 21 is the upper brim, 22 is the lower brim, 23 is the constriction, 24 is the side hole, and 25 is the head , 26 is a shaft hole, a,
l) indicates the distance, and c and d each indicate the diameter.

Claims (1)

[Scope of utility model registration request] It consists of a bottomed cylindrical case 1 made of a soft elastic material and a bottomed cylindrical movable valve 2 made of a hard material. A valve branch wall 14 protruding from the bottom wall 11 is integrally provided, and a center hole 15 is formed in the bottom wall 11.
The movable valve 2 has an upper part 21 and a lower collar 22, and a constricted part 23 extending upward from the base end of the lower collar 22. and a side hole 24 is bored in the constricted part 23, and the distance b from the top surface of the valve branch wall 14 to the lower surface of the bottom wall 11 is equal to the distance from the lower surface of the upper collar 21 to the base end of the lower collar 22. a
and the diameter d of the center hole 15 is larger than that of the constriction part 23.
By inserting the movable valve 2 into the shaft hole 13 of the cylindrical housing 1, seating the upper collar 21 on the top surface of the valve support wall 14, and inserting the constricted portion 23 into the center hole 15, This is an injection valve for a gas lighter, in which a valve support wall 14 and a bottom wall 11 are sandwiched between an upper flange 21 and a lower flange 22 to close a center hole 15.