Floatable firework device

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a firework device, and more particularly to a floatable firework device.

2. Description of the Related Art

Fireworks are used in the evening, and produce light, smoke, and noise for providing a festive mood. Conventional fireworks are hung or are placed on the ground, and are not designed to float on a water surface.

SUMMARY OF THE INVENTION

The object of this invention is to provide a floatable firework device.

According to this invention, a floatable firework device includes a hollow base for fitting an explosive therein, a waterproof fuse, and a tubular buoyancy member sleeved fixedly around an upper portion of the base. The base has a center of gravity at a lower end portion thereof. As such, the firework device can float on a water surface, with a flame-spraying upper end slit in the base being disposed above the water surface.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other features and advantages of this invention will become apparent in the following detailed description of a preferred embodiment of this invention, with reference to the accompanying drawings, in which:

FIG. 1

is an exploded perspective view showing the preferred embodiment of a floatable firework device according to this invention;

FIG. 2

is a sectional view of the preferred embodiment, illustrating how the preferred embodiment is disposed within a launching tube; and

FIG. 3

is a sectional view of the preferred embodiment, illustrating how the preferred embodiment floats on a water surface.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to

FIGS. 1

,

2

, and

3

, the preferred embodiment of a floatable firework device according to this invention is shown to include a hollow base

1

, an explosive unit

2

, a buoyancy member

3

, a waterproof film

4

, and a waterproof fuse

5

.

The hollow base

1

has a generally horizontal, circular bottom wall

11

and a conical surrounding wall

12

that are made of paperboards. The surrounding wall

12

has a lower end

121

that is adhered to an outer periphery of the bottom wall

11

, and an upper end tip

122

. An accommodation chamber

13

is defined between the bottom wall

1

and the surrounding wall

12

. A counterweight unit

14

is clamped between the bottom wall

11

and the explosive unit

2

so that the center of the gravity of the device is located adjacent to a lower end of the base

1

. The counterweight unit

14

is configured as a lump of iron powders, which can be replaced with a lump of sandy soil. Alternatively, the bottom wall

11

can be thickened so as to lower the center of gravity of the device, thereby serving as a counterweight unit. A flame-spraying upper end slit

15

is formed in an upper end of the base

1

, and is communicated with the accommodation chamber

13

.

The explosive unit

2

is fitted within the accommodation chamber

13

in the base

1

, and includes a plurality of explosive layers

21

, which are arranged on above another and which have different colors that are respectively red, yellow, blue, and green from the top to the bottom. The colors and the arrangement order thereof can be changed.

The buoyancy member

3

is tubular, and includes a ring-shaped top wall

31

that is adhered around the base

1

, and a surrounding wall

32

that is adhered to an outer periphery of the top wall

31

at an upper end

321

thereof and that reduces downwardly and gradually in diameter. The surrounding wall

32

has a lower end

322

that is adhered around the base

1

so as to define a sealed air chamber

33

between the buoyancy member

3

and the base

1

. As such, the base

1

can float on a water surface

7

(see

FIG. 3

) in such a manner that the upper end slit

15

is disposed above the water surface

7

. The top wall

31

and the bottom wall

11

have an outer diameter that is equal to the inner diameter of a launching tube

6

. That is to say, the base

1

has a maximum outer diameter which is equal to that of the buoyancy member

3

. Accordingly, the firework device can be positioned within the tube

6

such that the firework device can be launched from the tube

6

in a longitudinal direction of the tube

6

upon combustion of an explosive charge

61

in the tube

6

, as shown in FIG.

2

.

The fuse

5

has a lower end

51

that extends into and that is fixed within a hole in a bottom surface of the bottom wall

11

of the base

1

, and an upper end

52

that extends through the upper end slit

15

in the base

1

and into the accommodation chamber

13

and that is disposed adjacent to an upper end of the explosive unit

2

.

The film

4

is coated on an outer surface of an assembly of the base

1

and the buoyancy member

3

by spraying or immersion after assembling the buoyancy member

3

on the base

1

. Alternatively, the film

4

can be coated respectively on outer surfaces of the base

1

and the buoyancy member

3

prior to assembling the buoyancy member

3

on the base

1

.

With this invention thus explained, it is apparent that numerous modifications and variations can be made without departing the scope and spirit of this invention. It is therefore intended that this invention be limited only as indicated by the appended claims.