Gaslighter Structure Permitting Push-Fit Assembling of Its Main Parts

1. Field of the Invention

The present invention relates to a gaslighter.

2. Related Art

As is well known, a gaslighter has many small parts assembled. These lighter parts are assembled by hand. In the field of gas lighter industry the tendency is towards the reduction of the size and weight of lighter parts. Thus, assembling work increasingly requires skillfulness and much time invloved, and as a matter of fact the efficiency with which such small parts are assembled, cannot be improved.

With the above in mind one object of the present invention is to provide a gaslighter structure which permits the reduction of the number of the assembling steps, accordingly increasing the assembling efficiency.

To attain this object a gaslighter according to the present invention comprises: a lighter housing constituting a gas well and having a gas ejection nozzle fixed to the top of the housing and pivot means provided to the rear, upper side of the housing; a fire-striking unit including a holder covered with an inner cap which has a flame opening at its front end, said holder having push-fit means to integrally combine the holder with the housing, a fire-striking assembly fixed to the holder in vicinity of the flame opening, and a pipe laid on the underside of the holder with its head top close to the flame opening and its tail tip connected to the gas election nozzle; and a cap having counter pivot means to the pivot means of the housing, thereby permitting the cap to rotate about its pivot for closing and disclosing the fire-striking unit on the top of the housing. This arrangement permits the push-fit of the fire-striking unit and the cap to the lighter housing.

Other objects and advantages of the present invention will be understood from the following description of a gaslighter according to one preferred embodiment of the present invention, which is shown in the accompanying drawings:

FIG. 1 is a longitudinal section of a gaslighter according to one preferred embodiment of the present invention;

FIG. 2 is a longitudinal section of the gas lighter exploded into main parts;

FIGS. 3 and 4 are side views of the gaslighter partly broken and separated into main parts; and

FIG. 5 is a perspective exploded view of the gaslighter.

Referring to the drawings, a gaslighter A according to one embodiment of the present invention is shown as comprising a lighter housing 1, a fire-striking unit 2 and a cap 3. The lighter housing 1 is made of a synthetic resin, constituting a gas well 4. The lighter housing 1 has pivot means 5 provided to the rear, upper side of the housing for permitting the opening and closing of the cap 3. The lighter housing 1 has a bottom closure 4a fitted in its bottom opening and a top plug 6 fitted in the recess of the top of the lighter housing 1 in alignment with the opening 4b of the top of the lighter housing 1. A gas ejection nozzle 7 is fixed to the top plug 6 to be put in communication with the inside of the gas well 4. The gas ejection nozzle 7 comprises an outer hollow cylinder 7a, a gas ejection pipe 7b movably inserted in the outer hollow cylinder 7a with its tip appearing above the upper surface of the outer hollow cylinder 7a, and an inner hollow cylinder 7c which is inserted in the somewhat enlarged bottom opening of the outer hollow cylinder 7a. The inner hollow cylinder 7c opens at its bottom to communicate with the inside of the gas well 4. As shown, the gas ejection pipe 7b is biased downward by a spring S1 all the time, thereby closing the bottom hole 7e of the inner hollow cylinder 7c with its rubber plug 7d.

A lever 8 is fixed at its center to the tip of the gas ejection pipe 7b via a rubber ring N. The lever 8 has two pivots 8a projecting from the opposite sides of the front end of the lever, and two catch extensions 8b projecting backward from the opposite sides of the rear end of the lever.

The cap pivot means 5 comprises opposite extensions 9 in the rear, upper opposite sides of the lighter housing 1 and a lock unit 10 just below the extensions 9. The rear support 3b of the cap 3 can be rotatably fitted in the opposite extensions as later described.

Pivot holes 9a are made in the rear, upper opposite extensions 9a of the lighter housing 1, which the extensions are resilient. At best seen in FIG. 5, a guide slot 9b is made on each extension 9 to guide each pivot 3c to the pivot hole 9a to ensure the smooth push-fit of the cap pivots 3c in the pivot holes 9a of the lighter housing. The lockunit 10 is composed by a push piece 10b, which is inserted in the groove 10a between the rear wall 6a of the top plug 6 and the rear side 1a of the lighter housing 1. The push piece 10b can move vertically in the groove 10a under the influence of a spring S2.

A fire-striking unit 2 includes a holder 12, a fire-striking assembly 13 and a pipe 14. The holder 12 is made of a synthetic resin in the form of inverted "U". The holder 12 has three hooks 12a integrally connected to its lower edge. The holder 12 can be fixed to the lighter housing 1 with its hooks 12a caught by corresponding catch slots 6b made in the top plug 6.

The holder 12 has reentrances 12b at its lower front. When the holder 12 is push-fitted in the top of the housing 1, the opposite pivot projections 8a of the lever 8 are put in the reentrances 12b. Then, the lever 8 can rotae about its pivot 8a to raise the gas ejection pipe 7b for ejecting the gas from the gas well 4. The holder 12 has a metal cover 15 put thereon. The metal cover 15 has a flame opening 15a at its left front corner. The front tip of the pipe 14 is put close to the flame opening 15a, and the rear tip of the pipe 14 is inserted into one opening end of the "L"-shaped channel 14b of a connector block 14a which is fixed to the lower surface of the holder 12. When the holder 12 is push-fitted to the top of the housing 1, the tip of the gas ejection nozzle pipe 7b is inserted in the other opening end of the "L"-shaped channel 14b of the connector block 14a.

The fire-striking assembly comprises a file wheel 13a and a flint 13b which is pushed against the file wheel 13a by a spring S3. The file wheel 13a is rotatably fixed to the front of the holder 12 in the vicinity of the flame opening 15a. A rotary cylinder 16 is integrally connected to the file wheel 13a. When the rotary cylinder 16 is rotated, the file wheel 13a is rotated to rub the flint 13b for ignition of the gas which is ejected from the tip of the pipe 14.

In assebmling, the fire-striking-unit 2 is push-fitted in the top of the housing 1. Then, the hooks 12a of the holder 12 are caught by the catch slots 6b of the top plug 6. At the same time the rotary cylinder 16 stands on the shoulder of the housing 1 with the pivot projection 16a on the shoulder fitted in the counter hole of the rotary cylinder bottom.

The cap 3 is composed of a metal enclosure 3a and a support piece 3b integrally connected to the rear side of the metal enclosure 3a. The support piece 3b has opposite pivot projections 3c on the lower opposite surfaces of the support piece 3b. When the cap 3 and the housing 1 are assembled together, the support piece 3b of the cap 3 is push-fitted in the housing 1. Specifically, the opposite pivot projections 3c of the support piece 3b are fitted in the pivot holes 9a of the housing 1, and the bottom end of the support piece 3b rides on the top end of the push piece 10b of the lock unit 10. Then, the cap 3 can be rotated about its pivot 3c to its opening or closing position. The support piece 3b has a recess 3d on its bottom end, and the free end 8b of the lever 8 is inserted in the recess 3d of the support piece 3b. Thus, the opening of the cap 3 will cause the inclination of the lever 8 about its pivot 8a to raise the gas ejection pipe 7b, thereby opening the gas nozzle.

When the cap 3 is push-fitted in the housing 1, the opposite pivot projections 3c of the support piece 3b are somewhat forcedly inserted in the space between the rear opposite extension S9 of the housing 1 by causing them to yieldingly bend to somewhat expand the inter space. The opposite pivot projections 3c are guided by the guide slots 9b on the inside surfaces of the rear opposite extensions 9 of the housing 1 until they fall in the pivot holes 9a of the housing 1. Then, the rear opposite extenstions 9 of the housing 1 snap back to the original stress-free position to pivot the cap 3 to the housing 1.

As may be understood from the above, a gas lighter structure according to the present invention permits the push-fit assembling of the fire-striking unit to the housing and the cap to the housing, thereby simplifying the assembling work and accordingly contributing the automatization of the assembling process.