Abstract:
The invention relates to a fireworks bomb structure and manufacturing method thereof comprising a cover combining with an upper shell and an lower shell to form a filing chamber for accommodating effect fire powder, a sealing body combining with a base and the lower shell to form a propulsive chamber for accommodating launch powder which is interconnected to the filing chamber, and a long internal fuse with powder at both ends respectively extending to the filing chamber and propulsive chamber; thus the present invention provides a modular combination for easily filling the launch powder and effect fire powder respectively into the chambers by reversing a mold, achieving effects of timed detonation, manufacturing convenient and target accuracy.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The invention relates to a fireworks bomb structure and manufacturing method thereof, particularly to a modular fireworks bomb structure. 
         [0003]    2. Description of the Related Art 
         [0004]      FIG. 1  is a schematic view of a conventional fireworks bomb structure. The fireworks bomb structure  10  comprises a sphere  11  with effect fire powder therein, a first fuse and second fuse  12 A,  12 B respectively protruded on two sides of the sphere  11  for both ends thereof respectively located at inside and outside of the sphere  11 , a canister launcher  13  having launch powder  14  at a bottom layer thereof for leading the first fuse  12 A into the launch powder  14  and a fuse hole  131 , a third fuse  15  extended through the fuse hole  131  to the launch powder  14  and a fourth fuse  16  having an end connected to the second fuse  12 B and another end leading into the launch powder  14 . The aforesaid features are disclosed in CN Patent No. 201110741Y belongs to YONGFENG Firework MAG CO LTD. 
         [0005]      FIG. 2  is an application example of the fireworks bomb structure  10 . After igniting the first fuse  15 , the launch powder  14  undergoes chemical changes to produce an upward physical force for the fireworks bomb structure  10  and then the first fuse  12 A and fourth fuse  16  are ignited. While the fireworks bomb structure  10  is launched into the air, the first fuse  12 A continues to burn; meanwhile, the second fuse  12 B begins to burn for detonating the sphere  11 . Thus, the effect fire powder in the sphere  11  shows the fireworks effect, but the fireworks bomb structure  10  has the following disadvantages: 
         [0006]    1. The preset length and burning time of the first and second fuses  12 A,  12 B are difficult to mutually cooperate so the predetermined detonation time of the sphere  11  is hard to control. 
         [0007]    2. The first and second fuses  12 A,  12 B are respectively assembled and the effect fire powder of the canister launcher  13  and the launch powder  14  are not in the same structure so the manufacturing method of the fireworks bomb structure is complicated. 
         [0008]    3. The upward physical force of the sphere  11  reduces the resistance of the fluid, but that the gravity center is located in the center of the sphere is easy to produce the rotational force. As a result, when the flow speed of the fluid speeds up, the transmit path of the sphere is easily deflected. 
         [0009]    Therefore, the present invention is provided to solve the above problems. 
       SUMMARY OF THE INVENTION 
       [0010]    It is a primary object of the present invention to provide a fireworks bomb structure and manufacturing method thereof having launch powder and effect fire powder arranged in different chambers which are interconnected for predicting the detonated time by the combustion spacing between the chambers and to easily fill the launch powder and effect fire powder respectively into the chambers by reversing the mold, achieving timed detonation and manufacturing convenient effects. 
         [0011]    It is another object of the present invention to provide a fireworks bomb structure and manufacturing method thereof for strengthening the gravity center thereof, reducing the transmit path deflection probability thereof. 
         [0012]    In order to achieve the above objects, the present invention includes a lower shell being a semicircular body with an upward opening and having an annular concave portion at an upper periphery thereof, an lower annular groove at an external periphery thereof and a long hollow tube at a bottom thereof; a long internal fuse having powder at both ends thereof and inserted into the long hollow tube for a top end thereof and a bottom end thereof respectively projecting at an upper end and a lower end of the long hollow tube; a base being a hollow circular body, an upper periphery thereof corresponding to the lower annular groove having an annular flange expanded from the inside out for engaging the base with the lower shell and the base having a first fuse hole at a bottom periphery thereof; an upper shell being a semicircular body with a downward opening, a lower periphery thereof corresponding to the annular concave portion having an annular flange portion for engaging the upper shell with the lower shell to form a ball-shaped casing and the upper shell having a filing hole thereon; a cover sealing the filing hole and combining with the upper shell and the lower shell to form a filing chamber for accommodating effect fire powder; an external fuse fixed into the first fuse hole for an end thereof being in the base and another end thereof being outside the base; and a sealing body sealing a bottom of the base and combining with the base and the lower shell to form a propulsive chamber for accommodating launch powder. 
         [0013]    Based on the features disclosed, the cover a rounded body has a handle portion at an upper surface thereof; a lower surface thereof corresponding to the filling hole has a sealing portion and an upper annular groove is arranged between an external periphery of the filling hole and an external periphery of the upper shell for inserting the cover. Further, the handle portion of the cover may have a second fuse hole. The present invention may further comprise a canister launcher being a hollow cylinder body for placing the fireworks bomb structure. 
         [0014]    A manufacturing method of the fireworks bomb structure comprises the steps of: 
         [0015]    a) providing a lower shell being a semicircular body with an upward opening and having an annular concave portion at an upper periphery thereof, an lower annular groove at an external periphery thereof and a long hollow tube at a bottom thereof; 
         [0016]    b) providing a long internal fuse inserted into the long hollow tube for a top end thereof and a bottom end thereof respectively projecting at an upper end and a lower end of the long hollow tube, mixing toluene solvent, rubber powder and silt to coat on a gap between the internal fuse and the hollow tube for fixing the internal fuse to the hollow tube and then coating powder at both ends of the internal fuse; 
         [0017]    c) providing a hollow circular base having an annular flange expanded from the inside at an upper periphery thereof and a first fuse hole at a bottom periphery thereof and then mixing toluene, banana oil and lacquer thinner to coat on a gap between the annular flange and the lower annular groove for combining the annular flange and the lower annular groove and further for engaging the base with the lower shell; 
         [0018]    d) providing an upper shell being a semicircular body with a downward opening and having filing hole thereon and a lower periphery thereof corresponding to the annular concave portion having an annular flange portion for the upper shell engaging with the lower shell to form a ball-shaped casing; 
         [0019]    e) providing a first mold with a plurality of first through holes and a second mold with a plurality of second through holes respectively arranged at a bottom of the base and a top of the ball-shaped casing, respectively aligning centerlines of the first through hole and the second through hole with centerlines of the base and the ball-shaped casing to combine the first mold with the second mold for fixing the base and the ball-shaped casing respectively in the first through hole and second through hole, utilizing a quantitative hole of a quantitative board aligning with the filling hole to fill effect fire powder into the ball-shaped casing and then coating toluene on a gap between the cover and the filling hole to seal the filling hole and thus the upper shell, the lower shell and the cover combines together to form a filing chamber for accommodating the effect fire powder; 
         [0020]    f) providing a fixed board matched with the rounded cover and combining with the first mold to fix the base and the ball-shaped casing, inverting the first mold and second mold for the opening of the base being upward, loading launch powder in the base through the quantitative hole of the quantitative board, removing the second mold and the fixed board and then fixing the external fuse into the first fuse hole for an end thereof being in the base and another end thereof being outside the base; and 
         [0021]    g) providing a sealing body sealing the opening of the base and combining the base and the lower shell to form a propulsive chamber for accommodating the launch powder. 
         [0022]    Based on the technical features disclosed, the present invention provides a filling chamber interconnected with a propulsive chamber for respectively arranging effect fire powder and launch powder and an internal fuse with powder at both ends arranged between the filling chamber and propulsive chamber; thus, the detonated time can be predicted by the combustion spacing of the internal fuse. Moreover, both filling chamber and propulsive chamber are integrally molded and the fireworks bomb structure can be upside down to place the launch powder and effect fire powder by a first and second mold. Meanwhile, the propulsive chamber is able to strengthen the gravity center of the filling chamber. Therefore, the present invention provides timed detonation function and manufacturing convenient effect and reduces the transmit path deflection probability thereof. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0023]      FIG. 1  is a schematic view of a conventional fireworks bomb structure; 
           [0024]      FIG. 2  is a schematic view of a transmit path deflection of the conventional fireworks bomb structure; 
           [0025]      FIG. 3  is a perspective view of the present invention; 
           [0026]      FIG. 4  is an exploded sectional view of the present invention; 
           [0027]      FIG. 4A  is a schematic view of the present invention, illustrating a first mold and a second mold to be combined; 
           [0028]      FIG. 4B  is a schematic view of the present invention, illustrating the combination of the first mold and second mold; 
           [0029]      FIG. 4C  is a schematic view of the present invention, illustrating the filling of effect fire powder through a quantitative hole of a quantitative board; 
           [0030]      FIG. 4D  is a schematic view of the present invention, illustrating a fixed board combined with the first mold; 
           [0031]      FIG. 4E  is a schematic view of the present invention, illustrating the filling of launch powder through a quantitative hole of a quantitative board; 
           [0032]      FIG. 4F  is a schematic view of the present invention, illustrating the removing of the second mold; 
           [0033]      FIG. 5  is a schematic view of the assembly of the present invention; 
           [0034]      FIG. 6  is a cross-sectional view taken along the line  6 - 6  in  FIG. 5 ; 
           [0035]      FIG. 7  is an application example of the present invention combining with a canister launcher; 
           [0036]      FIG. 8  is a schematic view of the present invention, illustrating the launch powder being ignited by powder at a bottom end of an internal fuse; and 
           [0037]      FIG. 9  is a schematic view of the present invention, illustrating effect fire powder being ignited by powder at a top end of the internal fuse. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0038]    With the referenced to  FIGS. 3 through 9 , the embodiment of a fireworks bomb structure in accordance with the present invention comprises a lower shell  21  being a semicircular body with an upward opening and having an annular concave portion  211  at an upper periphery thereof, an lower annular groove  212  at an external periphery thereof and a long hollow tube  213  at a bottom thereof; a long internal fuse  22  having powder  221  at both ends thereof and inserted into the long hollow tube  213  for a top end thereof and a bottom end thereof respectively projecting at an upper end and a lower end of the long hollow tube  213 ; a base  23  being a hollow circular body, an upper periphery thereof corresponding to the lower annular groove  212  having an annular flange  231  expanded from the inside out for engaging the base  23  with the lower shell  21  and the base  23  having a first fuse hole  232  at a bottom periphery thereof; an upper shell  24  being a semicircular body with a downward opening, a lower periphery thereof corresponding to the annular concave portion  211  having an annular flange portion  241  for engaging the upper shell  24  with the lower shell  21  to form a ball-shaped casing  25  and the upper shell  24  having a filing hole  242  thereon; a cover  26  sealing the filing hole  242  and combining with the upper shell  24  and the lower shell  21  to form a filing chamber  27 A for accommodating effect fire powder  60 ; an external fuse  28  fixed into the first fuse hole  232  for an end thereof being in the base  23  and another end thereof being outside the base  23 ; and a sealing body  29  sealing a bottom of the base  23  and combining with, the base  23  and the lower shell  21  to form a propulsive chamber  27 B for accommodating launch powder  80 . 
         [0039]    In the embodiment, the cover  26  a rounded body has a handle portion  261  at an upper surface thereof; a lower surface thereof corresponding to the filling hole  242  has a sealing portion  262  and an upper annular groove  243  is arranged between an external periphery of the filling hole  242  and an external periphery of the upper shell  24  for inserting the cover  26 . Further, the handle portion  261  of the cover  26  has a second fuse hole  263 . 
         [0040]    Based on the features disclosed, a manufacturing method of the fireworks bomb structure comprising the steps of: 
         [0041]    a) providing a lower shell  21  being a semicircular body with an upward opening and having an annular concave portion  211  at an upper periphery thereof, an lower annular groove  212  at an external periphery thereof and a long hollow tube  213  at a bottom thereof; 
         [0042]    b) providing a long internal fuse  22  inserted into the long hollow tube  213  for a top end thereof and a bottom end thereof respectively projecting at an upper end and a lower end of the long hollow tube  213 , mixing toluene solvent, rubber powder and silt to coat on a gap between the internal fuse  22  and the hollow tube  213  for fixing the internal fuse  22  to the hollow tube  213  and then coating powder  221  at both ends of the internal fuse  22 ; 
         [0043]    c) providing a hollow circular base  23  having an annular flange  231  expanded from the inside at an upper periphery thereof and a first fuse hole  232  at a bottom periphery thereof and then mixing toluene, banana oil and lacquer thinner to coat on a gap between the annular flange  231  and the lower annular groove  212  for combining the annular flange  231  and the lower annular groove  212  and further for engaging the base  23  with the lower shell  21 ; 
         [0044]    d) providing an upper shell  24  being a semicircular body with a downward opening and having filing hole  242  thereon and a lower periphery thereof corresponding to the annular concave portion  211  having an annular flange portion  241  for the upper shell  24  engaging with the lower shell  21  to form a ball-shaped casing  25 ; 
         [0045]    Step e) is shown in  FIGS. 4A to 4C , providing a first mold  30  with a plurality of first through holes  31  and a second mold  40  with a plurality of second through holes  41  respectively arranged at a bottom of the base  23  and a top of the ball-shaped casing  25 , respectively aligning centerlines of the first through hole  31  and the second through hole  41  with centerlines of the base  23  and the ball-shaped casing  25  to combine the first mold  30  with the second mold  40  for fixing the base  23  and the ball-shaped casing  25  respectively in the first through hole  31  and second through hole  41 , utilizing a quantitative hole  51  of a quantitative board  50  aligning with the filling hole  242  to fill effect fire powder  60  into the ball-shaped casing  25  and then coating toluene on a gap between the cover  26  and the filling hole  242  to seal the filling hole  242  and thus the upper shell  24 , the lower shell  21  and the cover  26  combines together to form a filing chamber  27 A for accommodating the effect fire powder  60 ; 
         [0046]    Step f) is shown in  FIGS. 4D to 4F , f) providing a fixed board  70  matched with the rounded cover  26  and combining with the first mold  30  to fix the base  23  and the ball-shaped casing  25 , inverting the first mold  30  and second mold  40  for the opening of the base  23  being upward, loading launch powder  80  in the base  23  through the quantitative hole  51  of the quantitative board  50 , removing the second mold  40  and the fixed board  70  and then fixing the external fuse  28  into the first fuse hole  232  for an end thereof being in the base  23  and another end thereof being outside the base  23 ; and 
         [0047]    g) providing a sealing body  29  sealing the opening of the base  23  and combining the base  23  and the lower shell  21  to form a propulsive chamber  27 B for accommodating the launch powder  80 . 
         [0048]    With the references to  FIGS. 5 and 6 , the fireworks bomb structure  20  accomplished by the steps a) to f) of a manufacturing method provides the filling chamber  27 A and propulsion chamber  27 B combined together to form a integrally molding and the internal fuse  22  with powder  221  at both ends respectively contacted with the effect fire powder  60  and launch powder  80 . Moreover, the propulsive chamber  27 B strengthens the gravity center of the tilling chamber  27 A. In the embodiment, the fireworks bomb structure  20  may be made of plastic materials but it is not a limitation. 
         [0049]    With the referenced to  FIGS. 7 to 9 , the present invention further comprises a canister launcher  90  being a hollow cylinder body for placing the fireworks bomb structure  20 . When igniting the external fuse  28  extended through the second fuse hole  263  to a predetermined location which is outside of the canister launcher  90 , the launch powder  80  in the propulsive chamber  27 B is burned to ignite the powder  221  at the bottom end of the internal fuse  22  for the fireworks bomb structure  20  instantly injecting out of the canister launcher  90  and continually to burn the powder  221  at the top end of the internal fuse  22  in order to detonate the effect fire powder  60  to a predetermined range. 
         [0050]    Therefore, the present invention is to predict the time point of the detonation of the effect fire powder  60  through the length of the internal fuse  22  and to strengthen the gravity center thereof for not having transmit path deflection caused by the rotation; in other words, the present invention can control the timing for detonating the effect fire powder  60  to the predetermined range. Moreover, the design of the fireworks bomb structure provides convenient manufacturing method and increases safety. 
         [0051]    Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.