Shell structure of cracker

Abstract

The utility model discloses a shell structure of a cracker. Comprising a large-diameter cylinder and a small-diameter cylinder, the large-diameter cylinder and the small-diameter cylinder are in transition through a conical section, annular limiting structures are arranged on the inner walls of the upper end and the lower end of the large-diameter cylinder and used for fixing an upper paperboard and a lower paperboard, and longitudinal ribs are arranged on at least one side of the two sides of the annular limiting structure on the lower side. The artillery shell structure disclosed by the utility model can meet the requirement of mechanical production, and is beneficial to improving the production efficiency and the quality of products.

Description

Technical Field

[0001] This utility model belongs to the field of fireworks technology, specifically relating to a firework shell structure. Background Technology

[0002] Christmas poppers (also known as pull-string fireworks) are devices where colored paper is filled into a cardboard compartment inside the popper shell. Pulling a trigger cord causes the pyrotechnic powder to generate force, propelling the poppers out of the colorful confetti, creating a romantic or festive atmosphere. They are popular due to their high safety factor and are exported to Europe, America, Australia, and other countries. However, with the replacement of manually assembled shells with lower-cost integrated shells, popper production has gradually shifted from handmade to machine-made. Existing popper shell structures no longer meet the requirements of machine production, and the products suffer from defects such as insufficient shell strength and difficulty in loading the trigger cord.

[0003] In response to the above problems, there is an urgent need in the market for a structurally sound product that can improve the efficiency of machine manufacturing and the quality of pull-out string products. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model designs a cannon shell structure, and through the design of the cannon shell structure, it can achieve automated production with matching machines.

[0005] To achieve the above objectives, this utility model provides a pull-out cannon shell structure, including a large-diameter cylindrical tube and a small-diameter cylindrical tube, with a tapered section connecting the large-diameter cylindrical tube and the small-diameter cylindrical tube. The inner walls of the upper and lower ends of the large-diameter cylindrical tube are provided with annular limiting structures for fixing the upper and lower cardboard. At least one side of the lower annular limiting structure is provided with longitudinal ribs.

[0006] Furthermore, the annular limiting structures at the upper and lower ends of the large-diameter cylindrical tube are both slots.

[0007] Furthermore, the annular limiting structures at the upper and lower ends of the large-diameter cylindrical tube are a convex edge and a groove, respectively.

[0008] Furthermore, the bottom opening of the small-diameter cylindrical tube is a tapered hole to facilitate the passage of the pull rope.

[0009] Furthermore, the annular protrusion on the lower periphery of the small-diameter cylindrical tube is used to position the pull rope to fix the gold bar.

[0010] Furthermore, the large-diameter cylindrical tube and the small-diameter cylindrical tube are integrally injection molded.

[0011] Furthermore, the large-diameter cylindrical tube opening is provided with an annular protrusion.

[0012] The advantages of this utility model are: the produced pull-tab product has high strength, the upper and lower cardboard are not easy to fall off and affect the quality of the product, the bottom is designed with a conical hole to facilitate the passage of the pull rope, the pull-tab shell structure can meet the requirements of mechanized production, and it is conducive to improving the production efficiency and product quality of the product. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, as well as the beneficial effects of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other structures can be obtained based on the structures shown in these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0015] Figure 2 This is a cross-sectional view of Example 1.

[0016] Figure 3 This is a perspective view of Example 2.

[0017] Figure 4 This is a schematic diagram of the structure of Example 3.

[0018] Figure 5 This is a schematic diagram of the structure of Example 4.

[0019] Figure 6 This is a schematic diagram of the structure of Example 5. Detailed Implementation

[0020] Example 1

[0021] This embodiment provides a pull-out gun shell structure, which is integrally injection molded. See [link / reference]. Figure 1 , Figure 2 It includes a large-diameter cylindrical tube 1 and a small-diameter cylindrical tube 2. The large-diameter cylindrical tube and the small-diameter cylindrical tube are connected by a conical transition 3. The inner walls of the upper and lower ends of the large-diameter cylindrical tube are provided with annular limiting structures for fixing the upper cardboard 5 and the lower cardboard 6. The lower annular limiting structure is provided with longitudinal ribs on both sides, and there are four longitudinal ribs 7 arranged symmetrically.

[0022] The annular limiting structure described in this embodiment is a slot 4.

[0023] In this embodiment, the bottom opening of the small-diameter cylindrical tube is a tapered hole 8, which facilitates the passage of the pull rope.

[0024] The annular protrusion 9 on the lower periphery of the small-diameter cylindrical tube described in this embodiment is used to position the pull rope to fix the gold bar.

[0025] The large-diameter cylindrical tube and the small-diameter cylindrical tube described in this embodiment are integrally injection molded.

[0026] In this embodiment, the large-diameter cylindrical tube opening is provided with an annular flange 10.

[0027] Example 2

[0028] See Figure 3 It is largely the same as in Embodiment 1, except that the lower annular limiting structure has longitudinal ribs on only one side, and there are four longitudinal ribs 7' arranged symmetrically.

[0029] Example 3

[0030] See Figure 4 It is largely the same as Embodiment 1, except that longitudinal ribs are provided on both sides of the lower annular limiting structure, with eight longitudinal ribs arranged in a cross shape on the upper side and four longitudinal ribs arranged symmetrically on the lower side.

[0031] Example 4

[0032] join Figure 5 Similar to Embodiment 1, except that the annular limiting structures at the upper and lower ends of the large-diameter cylindrical tube in this embodiment are a protruding edge 11 and a slot, respectively.

[0033] Example 5

[0034] See Figure 6 It is largely the same as in Embodiment 1, except that the large-diameter cylindrical tube opening is provided with an annular convex edge 10'.

[0035] The pull-tab product made by this utility model has high strength, and the upper and lower cardboard are not easy to fall off and affect the quality of the product. The bottom is designed with a conical hole to facilitate the passage of the pull rope. The pull-tab shell structure can meet the requirements of mechanized production and is conducive to improving the production efficiency and product quality.

[0036] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A gun shell structure, characterized in that, It includes a large-diameter cylindrical tube and a small-diameter cylindrical tube, which are connected by a tapered section. The inner walls of the upper and lower ends of the large-diameter cylindrical tube are provided with annular limiting structures for fixing the upper and lower cardboard. At least one side of the lower annular limiting structure is provided with longitudinal ribs.

2. The gun shell structure according to claim 1, characterized in that, The annular limiting structures at the upper and lower ends of the large-diameter cylindrical tube are both slots.

3. The gun shell structure according to claim 1, characterized in that, The annular limiting structures at the upper and lower ends of the large-diameter cylindrical tube are a convex edge and a groove, respectively.

4. The gun shell structure according to claim 2 or 3, characterized in that, The bottom opening of the small-diameter cylindrical tube is a tapered hole.

5. The gun shell structure according to claim 4, characterized in that, The lower outer periphery of the small-diameter cylindrical tube has annular protrusions.

6. The gun shell structure according to claim 5, characterized in that, The large-diameter cylindrical tube and the small-diameter cylindrical tube are integrally injection molded.

7. The gun shell structure according to claim 6, characterized in that, The large-diameter cylindrical tube opening is provided with an annular convex edge.

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