JPH05685Y2 - - Google Patents

Description

[Detailed description of the invention] (Purpose of the invention) In order to operate the control valve for the flow rate of fuel supplied from the fuel tank to the crater, a thick elastic gasket is attached to the fuel tank which is rotatably attached to the support of the ignition device. By tilting forward the upper part of the crater valve rod whose handle is tightly inserted into the elastic gasket, the fuel flows into the shaft hole of the crater valve rod through the valve hole of the fuel flow control valve bored in the handle. A liquefied gas lighter that supplies liquefied gas is known, for example, from Japanese Utility Model Application Publication No. 1-111942. According to the invention described in the above-mentioned publication, a dumpling-shaped projection is provided at the top of the crater valve rod, which releases the drive of the lever for driving the crater valve rod and causes the slope of the crater valve rod to be In the process of extinguishing a fire by returning to an upright position, when the tip of the lever passes over the overhanging member upward, the forward tilt of the crater valve rod is momentarily strengthened, so that it reaches the valve hole of the flow control valve. It was devised to instantly increase the fuel supply to the fuel tank, and as a result, to extinguish the flame caused by the inappropriate air-fuel ratio. If the crater valve rod is formed into a simple straight cylinder shape without providing the above-mentioned overhang, even if the crater valve rod returns to its position, the small amount of liquefied gas remaining near the valve hole should be closed. Because the elastic gasket around the valve hole is forcibly expanded and the flame enters the valve hole, the flame persists for several seconds after the driving force of the crater valve rod is released.

According to the invention described in the above-mentioned publication, these drawbacks could be solved, but if the raw gas is dissipated due to an abnormal supply, it would be a waste of fuel consumption, and it would be difficult to ignite or extinguish the gas. However, the tinder valve rod moved in an awkward step-like manner, which caused problems in the usability of the lighter.

This invention provides a means to completely eliminate these drawbacks of the liquefied gas lighter as described above.

(Structure of the invention) This invention will be explained below with reference to illustrated embodiments. That is, 2 is a support for the ignition device 5 and the fuel tank 1. However, the fuel tank 1 is rotatably supported within a required angle range in order to adjust the flow rate of fuel supplied to the crater. Reference numeral 3 denotes a thick elastic gasket, which is tightly fitted into the mouth frame 11 of the fuel tank 1. As shown in FIG. 2, the elastic gasket 3 has a straight cylindrical shaft hole 31 bored therein. Reference numeral 4 denotes a hollow crater valve rod with a bottom, the handle of which is tightly inserted into the shaft 31, so that the crater valve rod 4 is pivotally supported so as to be elastically tiltable. However, as described below, the crater valve rod 4 is provided with a valve hole for a fuel flow control valve. Further, as described below, an opening/closing valve for a supply passage from the fuel tank 1 to the valve hole is provided, and this supply passage is opened when the upper part of the crater valve rod 4 is tilted forward.

The above-mentioned liquefied gas lighter is known, but according to this invention, in such a known one, the handle of the crater valve rod has a constricted part 45 between the upper collar 43 and the lower collar 44. drum-shaped part 42
is formed, and an upper side hole 46 is formed in the drum-shaped portion 42.
and a lower side hole 47 is bored. The upper side hole 46 forms the valve hole of the above-mentioned fuel flow control valve, the lower side hole 47 forms the exhaust hole, and the lower collar 44 forms the valve body of the above-mentioned supply passage opening/closing valve. It is formed.

Now, this invention has been developed as described above, but the illustrated embodiment is an application of the above-mentioned invention to a pen-type lighter, in which the fuel tank 1 corresponding to the shaft of the pen is attached to the windshield wall of the lighter. It is rotatably supported by a support body 2 forming a. That is, a spout frame 11 is adhesively fixed to the spout wall of the fuel tank 1, and the half brim portion 12 of the spout frame 11, which is particularly visible in FIG. When the fuel tank 1 is rotated, the end 13a or 13b of the half-flange 12 engages with the hook 21, so that the rotation angle range is approximately 180 degrees. It is becoming more and more limited.

Next, in the illustrated example, the igniter 5 is integrally formed with a flint cylinder 53 that elastically supports a flint 51 by a spring 52, a file wheel 54 that is pivotally supported by the flint cylinder 53, and a flint cylinder 53. The flint cylinder 53 has a shallow vertical groove (not shown in the figure) bored in the circumferential surface on both its left and right sides. (not shown) are vertical folds 57 formed to sandwich the flint cylinder 53 from both left and right sides of the rear end of the support body 2 (in the figure, the spring 52 below the flint cylinder 53
(part of which is visible between the two), the flint cylinder 53 is guided in the vertical direction,
3 can be pulled upwards. Note that the lower end of the spring 52 engages with a saucer 22 formed in a part of the support body 2, and the ignition device 5 is thus supported by the support body 2.

In the illustrated example, the elastic gasket 3 is of the type shown in FIG. 2, and is fitted into the fuel tank 1 via the mouth frame 11 shown in FIGS. 7 to 9. That is, while the lower end of the shaft hole of the mouth frame 11 has a funnel shape, the lower half of the elastic gasket 3 is in the form of a straight cylinder and has an outer diameter considerably larger than the inner diameter of the lower end of the mouth frame 11. It is tightly fitted into the mouth frame 11 by simply pushing it into the mouth frame 11 from above, and therefore no adhesive is required for tight fitting.

Furthermore, in the illustrated example, as can be seen particularly from FIGS. 3 to 7, the phase difference angle in the horizontal plane between the upper side hole 46 and the lower side hole 47 is set to about 85 degrees, but in this invention, The phase difference angle described above is not limited to this angle. That is,
Such a phase difference angle is determined by the distance between the lower brim 44 of the drum-shaped part 42 of the crater valve rod 4, and the constriction part 45.
Depth of constriction, upper side hole 46 and lower side hole 4
The optimum phase difference angle varies considerably depending on the setting position of the holes 7 and their hole diameters, and depending on the case, this phase difference angle may be 0. However, experiments have shown that in order to prevent hypersensitivity in fuel flow rate adjustment, the phase difference angle should not be set too small in general, but is preferably set at an appropriate angle of about 90 degrees.

Note that the sponge 32 shown in FIG. 1 temporarily absorbs and stores the liquefied gas contained in the fuel tank 1, and immediately responds to the opening of the crater valve rod 4 by tilting it, supplying fuel to the crater valve rod 4. It is designed so that it can be sent.

In other words, this idea was created as described above,
The upper side hole 46 bored in the drum-shaped part 42 of the crater valve rod 4 forms the valve hole of the flow control valve, and the lower brim 44 of the drum-shaped part 42 forms the supply passage from the fuel tank 1 to this valve hole. Since it forms the valve body of the on-off valve, the above-mentioned on-off valve is completely closed when the crater valve rod 4 is upright as shown in FIG.
The relationship between the drum-shaped portion 42 of the crater valve rod and the elastic gasket 3 in this state is shown in FIG. 10a. However, since the shaft hole 31 of the elastic gasket 3 has a straight cylindrical shape, the upper and lower ribs 43 and 44 that are biting into the wall of the shaft hole have a high degree of adhesion, but the circumferential surface of the constricted portion 45 and the elastic gasket 3 The degree of adhesion is relatively low.

By the way, since the handle of the crater valve rod 4 is tightly inserted into the straight cylindrical shaft hole 31 of the elastic gasket 3,
When the upper part of the crater valve rod 4 is tilted forward for ignition, the lower part of the drum-shaped part 42 including the lower brim 44 is exposed to the elastic gasket 3.
moves backwards against the pressure of
A gap S (see FIG. 10b) is generated between the front part of the circumferential surface of gasket 2 and the hole wall of shaft hole 31 of elastic gasket 3, and at the same time, the on-off valve, which has been in the closed state, opens. Therefore, the liquefied gas in fuel tank 1 is
It then enters the shaft hole 41 of the crater valve rod 4 through the upper side hole 46 which is the valve hole of the flow rate control valve, vaporizes, is released from the crater, and is ignited by the igniter. However, according to the illustrated example, since there is a slight gap between the lower side hole 47 and the wall of the shaft hole of the elastic gasket 3, a small amount of liquefied gas is also supplied from the lower side hole 47. A case where the upper side hole 46 and the lower side hole 47 are set in the same phase is not shown, but in that case, fuel is supplied from both these holes in almost the same way.
In order to limit the amount of fuel supplied to the required amount, it is necessary to set the diameters of both holes to be particularly small.

Next, when the driving force for tilting the upper part of the crater valve rod 4 forward is released, the crater valve rod 4 returns to the upright position shown in FIG. 1 due to the elasticity of the elastic gasket 3. As described above, when the crater valve rod 4 has completely returned to its original position, the opening/closing valve whose valve body is the lower flange 44 is completely closed, and therefore, there is no supply of liquefied gas from the fuel tank. .

By the way, according to this invention, the flame disappears immediately in response to the release of the driving force that tilts the upper part of the crater valve rod 4 forward, and no residual flame as described above is generated. Although the analysis of the causes of such quick response to flame extinguishment has not been completed, it is considered that the reasons are as follows.

That is, if the elastic gasket 3 and the crater valve rod 4 supported by the elastic gasket 3 are one moving system, the elastic moving body is the elastic gasket 3, and the crater valve rod 4 is the driven body of the elastic moving body. Considering the transient state immediately before the complete return of the crater valve rod 4, the shaft hole surface of the elastic gasket 3, which is an elastic moving body, performs damped self-vibration in the front-rear direction, and the crater valve rod 4, which is a driven body, Damped vibration occurs along with damped vibration. However, in this case, the damping force for the vibration of the vent valve rod 4 is due to the intermolecular friction within the solid of the elastic gasket 3. In the above-described transient state, the on-off valve of the supply passage has already been completely closed, and a small amount of liquefied gas remains around the constriction 45, but this layer of residual liquefied gas is itself an elastic gasket. Since it is a driven body according to No. 3, even if there is pressure, it will not cause braking of the crater valve rod 4. In the above-described transient state of the motor system, the drum-shaped portion 42
The amount of rearward movement of the level of the upper side hole 46 at the time of the tilting of the crater valve rod was smaller than the amount of rearward movement of the level of the lower side hole 47. The tightness between the elastic gasket 3 and the front and rear portions of the circumferential surface of the constricted portion 45 at the level of the side hole 46 is determined by the lower side hole 47.
level recovers earlier than that.

Therefore, even if the upper side hole 46 is closed by the shaft hole surface of the elastic gasket 3 in the elastic system transient state just before the vent valve rod 4 returns to its original position, the circumference of the constricted portion 45 at the level of the lower side hole 47 is There are still small gaps Sa, Sb (10th
(see Figure c) remains, and a small amount of unvaporized liquefied gas that has already been supplied to the front gap Sa remains here. Such a gap Sa is the elastic gasket 3
The front and rear wall surfaces of the shaft hole are subjected to vibration during this transition period, and during the vibration, relative movement occurs between the constriction portion 45 and the side wall surface of the shaft hole, so that the sliding surface is slightly 〓
Sc is generated, and through this Sc, the liquefied gas remaining in the front Sa is transferred to the rear Sb.
also enters. However, for convenience of understanding,
Please understand that the size of Sb is exaggerated.

As mentioned above, since the upper side hole 46 is closed at this point, it is difficult for the liquefied gas existing between Sa and Sb to enter the upper side hole 46, but it quickly flows through the lower side hole 47 to the crater valve. Since it enters the shaft hole 41 of the rod 4, vaporizes, and reaches the crater, it quickly burns out and is completely extinguished. That is, the lower side hole 47 constitutes a liquefied gas exhaust hole. Note that if the lower side hole 47 is not provided,
Since the liquefied gas remaining in Sa gradually enters the upper side hole 46 while forcing the elastic wall around the already closed upper side hole 46 to expand, the residual flame remains even after the forward tilting force is released. However, according to this invention, there is no such residual flame, and the crater valve rod 4
The flame is extinguished in response to the release of the drive.

Up to now, the effect of eliminating the residual flame has been explained using FIG. 10. FIG. 10 shows an embodiment in which the crater valve rod 4 is rotated so that the upper side hole 46 corresponding to the valve hole of the flow rate control valve faces forward. This is a mode of fuel flow rate adjustment that maximizes.

On the other hand, FIG. 11 shows that the amount of fuel supplied to the crater is minimized due to the rotation of the crater valve rod 4 accompanying the fuel tank.
In other words, a mode of fuel flow rate adjustment is shown to obtain a flame with the minimum practical length. That is, as can be seen from the illustration, in the illustrated embodiment this mode of adjustment involves operating the fuel tank 1 and moving the crater valve rod 4 to the tenth position.
Obtained by rotating 90 degrees from the angular position shown. In Figure 11a, the crater valve rod 4 is in the upright position, as in Figure 10A, and therefore the opening/closing valve constituted by the lower collar 44 of the drum-shaped portion and the elastic gasket 3 is closed. Because of this, the upper side hole 46
The liquefied gas in the fuel tank 1 is not supplied to the crater even if the flow control valve, which is configured as a valve hole, is opened.

Similarly to FIG. 10 b, in FIG. 11 b, the upper part of the crater valve rod 4 is in the forward tilted position and the drum-shaped part 42 is in the rearward position for ignition, so that the constricted part 45 is A gap S is generated near the front circumferential surface, and therefore the upper side hole 46 passes through the gap S and the on-off valve into the fuel tank 1, so that the practically minimum amount of liquefied gas flows through the crater valve. It is supplied to the shaft hole of the rod 4, but the lower side hole 47 is located at the rear, so it is closed by the elastic gasket 3.

Figure c in Figure 11 has the same information as Figure c in Figure 10.
A transitional state is shown in which the crater valve rod 4 is in a position immediately before returning to its original position. At this moment of transition, the upper side hole 46 is already closed by the elastic gasket 3, while the lower side hole 4 is closed, as in FIG. 10c.
There are slight gaps Sa and Sb remaining in the front and rear of the circumferential surface of the constriction part 45 at level 7,
At the same time, since the lower side hole 47 is open to the rear gap Sb, the remaining liquefied gas that cannot enter the upper side hole 46 can be removed from the gap Sc explained with reference to FIG.
As a result of entering the shaft hole 41 of the crater valve rod 4 through Sb and the lower side hole 47, this residual liquefied gas is completely consumed by the time the crater valve rod 4 is returned to its original position, and is immediately extinguished.

(Effects of the invention) That is, according to this invention, as described above, it is possible not only to provide a means for the lighter to extinguish the flame without leaving a residual flame in response to the release of the driving force applied to the tinder valve rod for ignition, but also to Unlike the prior art described above, the crater valve rod is not provided with an ugly dumpling-like protrusion,
Since the crater valve rod can be formed into a straight cylinder, awkward step-like movements of the crater valve rod can be avoided during ignition and extinguishing. Furthermore, there is no need for an abnormal supply of raw gas for extinguishing a fire, so there is no wastage of fuel. Thus, according to this invention, it is possible to provide a gas lighter with a tilting nozzle valve rod that is extremely comfortable to use and is economical.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional left side view of the main part of an embodiment of this invention when it is not in operation, Fig. 2 is a longitudinal sectional view of the main part of the elastic gasket before assembly, and Fig. 3 is the crater valve rod in Fig. 1. Figure 4 is a vertical left side view of the main part, and Figure 5 is a right side view of the lower part of Figure 4.
-A cross-sectional view, Figure 6 is also a B-B cross-sectional view, Figure 7
8 is a plan view, FIG. 9 is a bottom view, FIGS. 10 and 11 are explanatory views of the flow control valve and exhaust hole, and FIG. 10 is a cross-sectional view at the level of the upper side hole of the drum-shaped portion of the crater valve rod at the maximum flow rate adjustment position, and FIG. 11 is a cross-sectional view at the level of the upper side hole at the minimum flow rate adjustment position. 1 is a fuel tank, 11 is a mouth frame, 12 is a half brim, 13a, 13b are ends, 2 is a support, 21 is a hook, 22 is a saucer, 3 is an elastic gasket, 31 is a shaft hole, 32 is a sponge, 4 is a crater valve rod, 41 is a shaft hole, 42 is a drum-shaped part, 43 is an upper brim, 44 is a lower brim, 45 is a constriction part, 46 is an upper side hole, 47 is a lower side hole, 5 is an igniter, 51 is a flint, 52 is a spring, 53 is a flint cylinder, 54 is a file wheel, 55 is a clip, 56 is an ignition lever, 57 is a vertical pleat, S,
Sa, Sb, Sc are between 〓.

Claims (1)

[Scope of utility model registration request] It has a support body 2 that supports the ignition device 5 and also rotatably supports the fuel tank 1 within a required angle range in order to adjust the flow rate of fuel supplied to the crater, and has a thick-walled elastic body with a straight cylindrical shaft hole 31. The gasket 3 is tightly fitted into the mouth wall of the fuel tank 1, and the handle of the bottomed hollow crater valve rod 4, which has a valve hole for the fuel flow rate control valve, is tightly inserted into the shaft hole 31, thereby forming the crater valve rod 4. In the liquefied gas lighter, the upper part of the upper brim 43 is pivotably supported so that it can be tilted elastically, so that when the upper part of the nozzle valve rod 4 is tilted forward, the opening/closing valve of the supply passage from the fuel tank 1 to the valve hole opens. A drum-shaped part 42 having a constricted part 45 between the brim 44 is formed in the handle part of the crater valve rod 4, and an upper side hole 46 and a lower side hole 47 are bored in the drum-shaped part 42, and the upper side hole 46 allows the A gas lighter with a tilting nozzle valve rod, in which a valve hole of a fuel flow rate control valve is formed, a lower side hole 47 forms an exhaust hole, and a lower collar 44 forms a valve body of an on-off valve for the supply passage.