Rocket firework paper protecting and guiding sleeve convenient to install

Abstract

A sleeve body comprises a closed bottom end and an open mounting end, the mounting end is provided with a necking end, and the outer diameter of the necking end is smaller than that of the side wall of the sleeve body. The utility model has the beneficial effects that the necking end can easily enter the bottom port of the launch canister, and after the necking end enters the bottom port, the side wall of the sleeve body, the outer diameter of which is not reduced, is tightly matched with the bottom port of the launch canister, so that firmer installation is realized; and meanwhile, the cost is low.

Description

Technical Field

[0001] The utility model relates to a fireworks component, in particular to a fuse protection sleeve for rocket fireworks. Background Art

[0002] A fuse protector is a component used to protect the fuse in rocket fireworks. The fuse protector consists of a closed bottom end and an open mounting end. During transportation and storage, the fuse protector is nested in the bottom port of the launch tube to protect the fuse; during firing, the fuse protector is removed to ignite the fuse. To avoid environmental contamination from plastic components, the industry generally uses paper fuses, such as those described in the Chinese utility model patent publication "A rocket firework made entirely of paper" with authorization publication number CN208269742 U and the Chinese utility model patent publication "A paper fuse protector for a rocket firework" with authorization publication number CN215810482U.

[0003] The drawback of the existing technology is that the fuse sleeve needs to be removably nested in the launch tube port and cannot be fixed by gluing or other means. The outer diameter of the fuse sleeve is a tight fit with the inner diameter of the launch tube port, making assembly difficult. At the same time, as a small component with a large usage volume, it requires high cost control. Utility Model Content

[0004] In order to solve the above-mentioned drawbacks, the technical problem to be solved by the present invention is to provide a paper fuse sleeve for rocket fireworks that is low in cost and easy to install. In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is a paper fuse sleeve for rocket fireworks that is easy to install. The sleeve body includes a closed bottom end and an open installation end, and is characterized in that the installation end is provided with a necked end whose outer diameter is smaller than the side wall of the sleeve body.

[0005] The beneficial effect of the present invention is that the necked end described in the above technical solution is easy to enter the bottom port of the launch tube, and after entering the bottom port, the side wall of the sleeve whose outer diameter has not been reduced is tightly fitted with the bottom port of the launch tube to achieve a relatively firm installation; at the same time, it has the advantage of low cost.

[0006] In one embodiment, the necked end is composed of a plurality of folds distributed along the circumference, which facilitates processing.

[0007] In one embodiment, the bottom end of the sleeve is enclosed by a plurality of radially extruded flat bodies, each of which has a wave-shaped prism formed by extrusion, effectively improving processing efficiency. Furthermore, the number of the flat bodies is three.

[0008] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time.

[0009] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0010] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0011] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0012] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0013] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0014] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the embodiment from a first perspective, with the mounting end facing upward;

[0016] Figure 2 This is a schematic structural diagram of the embodiment from a second viewing angle, with the bottom facing upward. DETAILED DESCRIPTION

[0017] See attached Figure 1 、 2 , reflecting a specific structure of the present utility model. The sleeve body of the paper fuse sleeve for rocket fireworks that is easy to install includes a side wall 1, a closed bottom end 2, and an open installation end 3. The installation end 3 is provided with a necked end 301 with an outer diameter smaller than the side wall 1 of the sleeve body. In the example, the necked end 301 is composed of a number of wrinkles 302 distributed along the circumference. When processing the necked end 301, it is only necessary to insert the inner mold rod into the sleeve body to an appropriate depth, and then insert the entire rod into the mold cavity of the outer mold. The circular mold head of the inner mold rod cooperates with the corresponding mold cavity to press and form, which is convenient and inexpensive to process.

[0018] Since the outer diameter of the tapered end 301 is small, it is easy to enter the bottom port of the launch tube. After entering the bottom port, pressure is applied to make the side wall 1 of the sleeve enter the bottom port of the launch tube. The side wall 1 and the bottom port of the launch tube fit tightly together to achieve a relatively firm detachable installation.

[0019] In the prior art, the sleeve is rolled from a paper tape and has a strong ability to recover from deformation. The bottom end 2 is glued and sealed by flattening the side wall 1 of the sleeve. In this closed structure, since the side wall 1 of the sleeve has a strong ability to recover from deformation, the glue is easily loosened before it is cured. In order to avoid quality problems, a longer pressing cycle is required to wait for the glue to dry. In the example, the bottom end 2 of the sleeve is closed by three flat bodies 201 formed by radial extrusion through a gluing portion 203, and the flat body has a wavy prism 202 formed by extrusion. This flat body closed structure with a wavy prism can effectively avoid the deformation recovery of the paper side wall 1 after extrusion molding, thereby shortening the pressing cycle and improving processing efficiency.

[0020] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the present invention to the specific implementation methods described. Obviously, many modifications and changes can be made based on the contents of this specification. This specification selects and describes these embodiments in detail in conjunction with the accompanying drawings in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is only limited by the claims and their full scope and equivalents, and is not limited by the specific embodiments disclosed.

Claims

1. A paper fuser for rocket fireworks that is easy to install, the fuser comprising a side wall (1), a closed bottom end (2), and an open installation end (3), characterized in that: The mounting end (3) is provided with a necked end (301) having an outer diameter smaller than that of the sleeve side wall (1), and the necked end (301) is composed of a plurality of folded portions (302) distributed along the circumference; the bottom end (2) of the sleeve is closed by a glued portion (203) by three flat bodies (201) extruded along the radial direction of the bottom end of the sleeve, and the flat body (201) has a wave prism (202) formed by extrusion.

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