A primer, a firework cartridge, and fireworks

Abstract

This invention relates to a primer, a fireworks cartridge case, and fireworks. The primer of this invention includes a primer plate and a heating wire; the primer plate comprises a first primer plate and a second primer plate stacked on top of each other, with the second primer plate fixedly disposed at the bottom of the first primer plate; the first primer plate has a vertical through hole, which, together with the top of the second primer plate, forms a groove; the bottom of the first primer plate has at least one ring of first annular pads surrounding the through hole, and the top of the second primer plate has at least one ring of second annular pads corresponding to the first annular pads, the first and second annular pads being welded together. The primer of this invention has a simple structure, is easy and efficient to manufacture, and because the first and second annular pads are welded together, they can jointly seal the gap between the first and second primer plates, and simultaneously achieve fixation between the first and second primer plates.

Description

Technical Field

[0001] This invention relates to the field of fireworks technology, and in particular to a primer, a fireworks cartridge, and fireworks. Background Technology

[0002] Current fireworks shells typically consist of a shell and a primer located at the bottom of the shell. The primer is used to ignite the gunpowder inside the shell. Based on the form of energy input to the primer in the fireworks shell, primers can generally be classified into several categories: impact ignition, electric primer, and dual-use (impact and electric) primers.

[0003] Please see Figure 1 This refers to a type of fireworks shell, specifically a shell casing, comprising a casing 1 and an electric primer 2. The electric primer 2 is attached to the bottom of the casing 1 by applying an adhesive layer 3. (See also...) Figure 2 The electric primer 2 structure has a convex cross-section, including a PCB base plate 21, and PCB vertical plates 22, heating wires 23, and primer powder 24 erected on the PCB base plate 21. The PCB base plate 21 is provided with a first base plate conductive section 211 and a second base plate conductive section 212; the PCB vertical plates are provided with a first vertical plate conductive section 221 and a second vertical plate conductive section 222; the first base plate conductive section 211 and the first vertical plate conductive section 221 are electrically connected, and the second... The base plate conductive part 212 and the second vertical plate conductive part 222 are electrically connected; the heating wire 23 is set on the top of the PCB vertical plate 22, one end of the heating wire 23 is soldered to the first vertical plate conductive part 221 by soldering, and the other end passes around the top of the PCB vertical plate 22 and is soldered to the second vertical plate conductive part 222 by soldering; the primer powder 24 is formed by sticking semi-solid gunpowder onto the heating wire 23 at the top of the PCB vertical plate 22 to form a primer powder 24 similar to match head gunpowder.

[0004] In the aforementioned technologies and other existing technologies, the production process of electric primers requires fixing each heating wire to the PCB base plate or PCB vertical plate one by one, and simultaneously attaching each primer powder to the heating wire one by one, making the production process complex and inefficient. Furthermore, the primer powder 24, located on the upper part of the PCB vertical plate 22, has poor adhesion, and due to multiple factors such as collisions, significant vibrations, and drops during transportation or use, the primer powder 24 may shift, making it prone to detachment. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a primer that has the advantages of simple structure and convenient and efficient production.

[0006] A primer includes a primer plate and a heating wire; the primer plate includes a first primer plate and a second primer plate stacked on top of each other, the second primer plate being fixedly disposed at the bottom of the first primer plate; wherein: the first primer plate has a vertical through hole, the through hole and the top of the second primer plate forming a groove; the bottom of the first primer plate is provided with at least one ring of first annular pads surrounding the through hole, and the top of the second primer plate is provided with at least one ring of second annular pads corresponding to the first annular pads, the first annular pads and the second annular pads being welded to each other; the first primer plate is respectively provided with a first layer of first-layer primer plate extending from the bottom of the first primer plate to the top of the first primer plate. The device comprises a conductive section and a first-layer second conductive section; the second-layer base plate is respectively provided with a second-layer first conductive section and a second-layer second conductive section, which are conductive from the bottom to the top of the second-layer base plate; the bottom of the first-layer first conductive section is conductive to the top of the second-layer first conductive section, and the bottom of the first-layer second conductive section is conductive to the top of the second-layer second conductive section; the heating wire is disposed on the top of the first-layer base plate, one end of the heating wire is fixedly connected to the top of the first-layer first conductive section, the heating wire extends from the top of the first-layer first conductive section through the groove to the top of the first-layer second conductive section, and the other end of the heating wire is fixedly connected to the first-layer second conductive section.

[0007] The primer of this invention features a through hole in the first primer plate, which, together with the top of the second primer plate, forms a accommodating space (i.e., a groove) for accommodating primer powder. This groove accommodates and limits the primer powder, ensuring its stable position even during transportation or use, preventing separation from the heating wire, a problem common in existing technologies. The first and second conductive sections in the first primer plate, and the second and third conductive sections in the second primer plate, facilitate electrical conductivity. The heating wire, positioned at the top of the first primer plate with one end fixedly connected to the first conductive section and the other end fixedly connected to the second conductive section via the groove, allows the heating wire to ignite the primer powder within the groove.

[0008] Furthermore, the applicant considers that, based on the stacking of the second primer plate and the first primer plate, if glue is used to fix the second primer plate to the bottom of the first primer plate during production, the production efficiency is low and leakage risks are likely to occur. This is because glue fixation takes a long time (e.g., waiting for the glue to fully solidify), and manual glue application is of poor quality and slow speed. Even with machine-applied glue, it still requires waiting for the glue to solidify, and the quality is difficult to guarantee, resulting in a low yield. Moreover, if glue is used for fixation, after the primer powder is assembled in the groove, the primer powder is ignited, igniting the fireworks powder. The resulting high-pressure gas passing through the through hole can exert a downward thrust on the second primer plate, easily causing the second primer plate to tend to move away from the first primer plate, thus increasing the gap between the first and second primer plates and creating a risk of gas leakage from the gap between them. Alternatively, if another method is used for fixing, such as welding pads to each other on the second and first primer plates, even if the welding is strong, the gas cannot be prevented from leaking from the gap between the first and second primer plates because the shape of the welding pads is mostly square or other non-circular.

[0009] Therefore, the applicant further addresses the problem arising from the overlapping arrangement of the second primer plate and the first primer plate: during fireworks use, the high-pressure gas generated by the combustion of the fireworks gunpowder easily leaks from the gap between the first primer plate and the second primer plate. This invention addresses this by having at least one ring of first annular pads surrounding the through hole at the bottom of the first primer plate, and at least one ring of second annular pads corresponding to the first annular pads at the top of the second primer plate. The first and second annular pads are welded together; thus, a sealing effect is achieved. After the first and second annular pads are welded together, they can jointly seal the gap between the first and second primer plates, preventing gas leakage, and simultaneously fixing the first and second primer plates together.

[0010] The primer structure described in this invention is simple, easy to produce, and highly efficient. When it is assembled onto the shell of a firework and gunpowder is loaded inside the shell, the gunpowder can fall into the groove. After connecting the second layer first conductive part and the second layer second conductive part at the bottom of the second primer plate to the positive and negative terminals of the power supply, the heating wire is energized through electrical conduction. After the heating wire heats up, it ignites the gunpowder in the groove. At the same time, since the first annular welding pad and the second annular welding pad are welded together, it can prevent the gas from flowing from the groove to the gap between the first layer primer plate and the second layer primer plate, and prevent the gas from leaking from the gap between the first layer primer plate and the second layer primer plate.

[0011] Furthermore, both the first and second primer layers are PCB boards. PCB boards facilitate the placement of the first and second annular pads, and easily enable electrical conduction between the first and second primer layers, while also being low in cost.

[0012] In some preferred embodiments, the first annular pad may be the bottom of the first conductive portion of the first layer and / or the bottom of the second conductive portion of the first layer; the second annular pad may be the top of the second conductive portion of the second layer and / or the top of the second conductive portion of the second layer. As one embodiment of the above embodiments, the bottom of the first conductive portion of the first layer and / or the bottom of the second conductive portion of the first layer is annular around the through hole; the top of the second conductive portion of the first layer and / or the top of the second conductive portion of the second layer is correspondingly annular; the first annular pad is the bottom of the annular first conductive portion of the first layer and / or the bottom of the annular second conductive portion of the first layer; the second annular pad is the top of the annular second conductive portion of the second layer and / or the top of the annular second conductive portion of the second layer. Thus, by using the bottom of the first conductive portion of the first layer in an annular shape and / or the bottom of the second conductive portion of the first layer in an annular shape as the first annular pad, and the top of the first conductive portion of the second layer in an annular shape and / or the top of the second conductive portion of the second layer in an annular shape as the second annular pad, a sealing function is achieved on the one hand. After the first annular pad and the second annular pad are welded together, they can jointly seal the gap between the first base plate and the second base plate, and simultaneously fix the first base plate and the second base plate. On the other hand, a conductive function is also achieved. Through the mutual welding of the first annular pad and the second annular pad, the first conductive portion of the first layer and the second conductive portion of the first layer are connected, and / or the first conductive portion of the second layer and the second conductive portion of the second layer are connected.

[0013] In other embodiments, the first annular pad may also be a structure that is different from the bottom of the first conductive portion of the first layer and / or the bottom of the second conductive portion of the first layer, and the second annular pad may also be a structure that is different from the top of the first conductive portion of the second layer and / or the top of the second conductive portion of the second layer.

[0014] Furthermore, the middle portion of the heating wire is recessed into the groove. By placing the middle portion of the heating wire within the groove, it is convenient to place the primer powder within the groove and onto the heating wire. During the production process, a mold is typically used to press the middle portion of the heating wire into the groove.

[0015] Furthermore, the tops of the first conductive portion and the second conductive portion of the first layer are respectively located on both sides of the through hole. To facilitate the arrangement of the heating wire so that its center can pass through the groove, it is preferable to place the tops of the first conductive portion and the second conductive portion on both sides of the groove, so that the heating wire extends from the top of the first conductive portion through the groove to the top of the second conductive portion.

[0016] Furthermore, the sidewalls of the groove are respectively provided with a first groove and a second groove; the heating wire extends from the top of the first conductive part through the first groove, the second groove, and the first conductive part to the top of the second conductive part. During the bottom-fired production process, a mold is generally used to press the heating wire into the groove. To reduce physical damage to the heating wire when the mold presses the middle of the heating wire into the groove (for example, a large bend in the heating wire when pressed into the groove can easily lead to the risk of breakage), the sidewalls of the groove are further provided with a first groove and a second groove. The heating wire extends from the top of the first conductive part of the first layer through the first groove, the second groove, and the first conductive part to the top of the second conductive part of the first layer. In this case, the first groove and the second groove can reduce the degree of bend when the middle of the heating wire is pressed into the groove, thus avoiding physical damage to the heating wire during production.

[0017] Furthermore, the primer plate also includes a third primer plate, which is stacked and fixedly disposed at the bottom of the second primer plate. The third primer plate is respectively provided with a third-layer first conductive portion and a third-layer second conductive portion, which extend from the bottom to the top of the third primer plate. The third-layer first conductive portion is connected to the second-layer first conductive portion, and the third-layer second conductive portion is connected to the second-layer second conductive portion. By providing the third primer plate, the airtightness of the primer can be increased, allowing the thrust and energy of the combustion gases generated when the gunpowder burns in the groove to be dispersed through the third primer plate, reducing its impact on the second primer plate and preventing the gap between the first and second primer plates from widening further.

[0018] Furthermore, the primer also includes primer powder, which is disposed within the groove and fixed to the heating wire.

[0019] This invention also provides a fireworks shell, comprising a shell and any of the aforementioned primers. The shell has a cavity, and the primer is disposed at the bottom of the shell. The cavity communicates with the groove of the primer. In the fireworks shell of this invention, after the primer is disposed at the bottom of the shell, the groove communicates with the cavity of the shell, so that after fireworks powder is loaded into the cavity of the shell, the fireworks powder can fall into the groove. When the primer does not contain primer powder, after the fireworks powder is loaded, it falls into the groove and contacts a heating wire, directly igniting the fireworks powder. When the primer contains primer powder, after the fireworks powder is loaded, it contacts the primer powder in the groove, and the primer powder is ignited by energizing the heating wire, thereby rapidly igniting the fireworks powder.

[0020] This invention also provides a firework, comprising any of the firework cartridge cases, firework gunpowder, and firework projectiles described above; the firework gunpowder and the firework projectile are respectively assembled in the firework cartridge case; wherein the gunpowder is located within the cavity and the groove. When the primer is not equipped with primer gunpowder, the firework gunpowder falls into the groove and comes into contact with the heating wire, which directly ignites the firework gunpowder. When the primer is equipped with primer gunpowder, the firework gunpowder comes into contact with the primer gunpowder in the groove, and the heating wire ignites the primer gunpowder, thereby rapidly igniting the firework gunpowder.

[0021] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a fireworks shell in the prior art;

[0023] Figure 2 This is a schematic diagram of the structure of an electric underfire in the prior art;

[0024] Figure 3 for Figure 2 A schematic diagram of the cross-section of an electric bottom fire;

[0025] Figures 1-3 In the middle: 1. Housing; 2. Electric primer; 21. PCB base plate; 211. First base plate conductive part; 212. Second base plate conductive part; 22. PCB vertical plate; 221. First vertical plate conductive part; 222. Second vertical plate conductive part; 23. Heating wire; 24. Primer powder; 3. Adhesive layer;

[0026] Figure 4 This is a schematic diagram of the structure of a firework shell according to the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of a primer according to the present invention;

[0028] Figure 6 for Figure 5 A schematic diagram of the cross-section of the primer;

[0029] Figure 7 This is a structural diagram of the top (left) and bottom (right) of the first layer of the base plate;

[0030] Figure 8 This is a structural diagram of the top (left) and bottom (right) of the second-layer base plate;

[0031] Figure 9 This is a structural diagram of the top (left) and bottom (right) of the third-layer base plate;

[0032] Figures 4-9 Middle: 1. Shell; 10. Cavity; 2. Primer; 21. Primer plate; 211. First primer plate; 21101. Through hole; 2110. Groove; 2111. First conductive part of the first layer; 2112. Second conductive part of the first layer; 212. Second primer plate; 2121. First conductive part of the second layer; 2122. Second conductive part of the second layer; 213. Third primer plate; 2131. First conductive part of the third layer; 2132. Second conductive part of the third layer; 22. Heating wire; 221. First middle section; 222. Second middle section; 223. Third middle section. Detailed Implementation

[0033] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Furthermore, the terms "first," "second," "third," etc., used in the specification and claims are only for the purpose of distinguishing the description of the same technical features and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated, nor necessarily the order of description or chronological sequence. Where appropriate, the terms are interchangeable. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0035] Similarly, the term "connection" is used in the specification and claims and should not be construed as limited to a direct connection. Therefore, the expression "device A is connected to device B" should not be limited to device A being directly connected to device B in a device or system; it means that there is a path between device A and device B, which can be a path that includes other devices or tools.

[0036] Example 1

[0037] This embodiment provides a primer 2; please refer to [link / reference]. Figures 5-6 The system includes a primer plate 21 and a heating wire 22. The primer plate 21 comprises a first primer plate 211 and a second primer plate 212 stacked on top of each other. Both the first and second primer plates are PCB boards, and the second primer plate 212 is fixedly disposed at the bottom of the first primer plate 211. The first primer plate 211 has a vertical through hole 21101, which, together with the top of the second primer plate 212, forms a groove to accommodate and position the primer powder. Please refer to [link / reference]. Figure 4 When the primer 2 of this embodiment is applied to the bottom of the shell 1 of the fireworks shell and fireworks gunpowder is assembled in the cavity of the shell 1, the fireworks gunpowder can fall into the groove 2110 along with the primer gunpowder. The groove 2110 can accommodate and limit the primer gunpowder, so that even if the fireworks are bumped or vibrated during transportation or use, the primer gunpowder can be stably located in the groove, avoiding the problem of the primer gunpowder possibly separating from the heating wire in the prior art.

[0038] To facilitate the ignition of gunpowder, the primer 2 in this embodiment is an electric primer. The first primer plate 211 is provided with a first layer of first conductive portion 2111 and a first layer of second conductive portion 2112, which connect to the top of the first primer plate 211. The second primer plate 212 is provided with a second layer of first conductive portion 2121 and a second layer of second conductive portion 2122, which connect to the top of the second primer plate 212. The first layer of first conductive portion 2111... The bottom of the first conductive part 2121 of the first layer is connected to the top of the second conductive part 2122 of the second layer, and the bottom of the second conductive part 2112 of the first layer is connected to the top of the second conductive part 2122 of the second layer; the heating wire 22 is disposed on the top of the first base plate 211, one end of the heating wire 24 is fixedly connected to the top of the first conductive part 2111 of the first layer, the heating wire 22 extends from the top of the first conductive part 2111 of the first layer through the groove 2110 to the top of the second conductive part 2112 of the first layer, and the other end of the heating wire 22 is fixedly connected to the second conductive part 2112 of the first layer. In this way, the circuit of "second layer first conductive part 2121 - first layer first conductive part 2111 - heating wire 22 - first layer second conductive part 2112 - second layer second conductive part 2122" is made conductive. When the second layer first conductive part 2121 and the second layer second conductive part 2122 are respectively energized, a circuit is formed, and the heating wire 22 is energized and heats up to ignite the gunpowder in the groove 2110, thus realizing the function of an electric primer. The primer 2 in this embodiment has a simple structure and is easy and efficient to manufacture.

[0039] In addition, this embodiment takes into account that, based on the superposition of the second base plate 212 and the first base plate 211, if glue is used to fix the second base plate 212 to the bottom of the first base plate 211 during production, the production efficiency is low and leakage risk is easy to occur. On the one hand, glue fixing takes a long time (for example, waiting for the glue to completely solidify), and on the other hand, manual glue application is of poor quality and slow speed. Even if glue is applied by machine, it is still necessary to wait for the glue to solidify, and the quality is difficult to guarantee, resulting in a poor yield. Furthermore, if glue is used for fixing, after the primer powder is installed in the groove 2110, the primer powder is ignited, igniting the fireworks powder. The resulting high-pressure gas passing through the through hole 21101 can exert a downward thrust on the second primer plate 212, easily causing the second primer plate 212 to tend to move away from the first primer plate 211. This increases the gap between the first primer plate 211 and the second primer plate 212, creating a risk of gas leakage from the gap between the first primer plate 211 and the second primer plate 212. Alternatively, if another fixing method is used, such as welding pads to the second primer plate 212 and the first primer plate 211, even if the welding is strong, the shape of the welding pads is mostly square or other non-circular, so gas leakage from the gap between the first primer plate 211 and the second primer plate 212 cannot be completely prevented after welding.

[0040] Therefore, this embodiment further solves the problem caused by the superposition of the second base plate 212 and the first base plate 211: when fireworks are used, the high-pressure gas generated by the combustion of the fireworks gunpowder is prone to leak from the gap between the first base plate 211 and the second base plate 212. Therefore, in this embodiment, the bottom of the first base plate 211 is provided with at least one ring of first annular pads surrounding the through hole, and the top of the second base plate 212 is provided with at least one ring of second annular pads corresponding to the first annular pads. The first annular pads and the second annular pads are welded to each other; through the mutual welding of the first annular pads and the second annular pads, the gap between the first base plate 211 and the second base plate 212 is sealed together, and the first base plate 211 and the second base plate 212 are fixed.

[0041] In this embodiment, by designing the shape of the bottom of the first conductive part 2111 and the bottom of the second conductive part 2112 of the first layer, the bottom of the first conductive part 2111 and the bottom of the second conductive part 2112 of the first layer are respectively used as first annular pads; by designing the shape of the top of the first conductive part 2121 and the top of the second conductive part 2122 of the second layer, the top of the first conductive part 2121 and the top of the second conductive part 2122 of the second layer are respectively used as second annular pads. In this way, both the function of conducting electricity can be achieved and the gap between the first base plate 211 and the second base plate 212 can be sealed.

[0042] Specifically, in this embodiment, please refer to Figure 7 and Figure 8 The bottom of the first conductive part 2111 and the bottom of the second conductive part 2112 of the first layer are respectively annular around the through hole 21101; the top of the first conductive part 2121 and the top of the second conductive part 2122 of the second layer are respectively annular corresponding to the bottom of the first conductive part 2111 and the bottom of the second conductive part 2112 of the first layer; the first annular pad is the bottom of the first conductive part 2111 and the bottom of the first conductive part 2112 of the first layer; the second annular pad is the top of the second conductive part 2121 and the top of the second conductive part 2122 of the second layer.

[0043] Thus, the bottom of the first conductive portion 2111 in the first layer and the bottom of the second conductive portion 2112 in the first layer are used as the first annular pad, and the top of the first conductive portion 2121 in the second layer and the top of the second conductive portion 2122 in the second layer are used as the second annular pad. The bottom of the annular first conductive part 2111 is welded to the top of the annular second conductive part 2121, and the bottom of the annular second conductive part 2112 is welded to the top of the annular second conductive part 2122. In this way, on the one hand, a sealing effect is achieved, and after welding, the gap between the first primer plate 211 and the second primer plate 212 can be sealed together, and the first primer plate 211 and the second primer plate 212 can be fixed at the same time. On the other hand, the first conductive part 2111 and the first conductive part 2121 are connected, and the first conductive part 2112 and the second conductive part 2122 are connected respectively.

[0044] In this embodiment, the middle portion of the heating wire 22 is recessed into the groove 2110. By placing the middle portion of the heating wire 22 within the groove 2110, it is convenient to place the primer powder within the groove 2110 and onto the heating wire 22. In actual production, a mold can be used to press the middle portion of the heating wire 22 into the groove 2110. To facilitate the arrangement of the heating wire 22 and ensure that its middle portion passes through the groove 2110, please refer to [reference needed] in this embodiment. Figure 5 The top of the first conductive part 2111 and the top of the second conductive part 2112 of the first layer are located on both sides of the through hole, so that the heating wire 22 can extend from the top of the first conductive part 2111 through the groove 2110 to the top of the second conductive part 2112 of the first layer.

[0045] During the primer production process, a mold is generally used to press the heating wire 22 into the groove 2110. In order to reduce the physical damage to the heating wire 22 when the mold presses the middle part of the heating wire 22 into the groove 2110 (for example, the bending degree of the heating wire 22 when the middle part of the heating wire 22 is pressed into the groove 2110 is large, which can easily lead to the risk of the heating wire 22 breaking), as an improvement to the above solution, in this embodiment, the sidewall of the groove 2110 is also provided with a first groove 2120 and a second groove 2130 respectively; the heating wire 2110 extends from the first conductive part 2111 of the first layer through the first groove 2120, the groove 2110 and the second groove 2130 to the second conductive part 212. By providing the first groove 2120 and the second groove 2130 on the sidewall of the groove 2110 respectively, the bending degree of the heating wire 22 when the middle part of the heating wire 22 is pressed into the groove 2110 can be reduced, and physical damage to the heating wire 22 during the production process can be avoided. In one embodiment of the above solution, the middle portion of the heating wire 22 includes a first middle section 221, a second middle section 222, and a third middle section 223 connected in sequence. The first middle section 221 bends downwards from the top surface of the base plate 21 towards the bottom surface of the groove 2110, and is located within the first groove 2120. The second middle section 222 is close to the bottom surface of the groove 2110. The third middle section 223 bends upwards from the bottom surface of the groove 2110 to the top surface of the base plate 21, and is located within the second groove 2130. This reduces the degree of bending that occurs when the middle portion of the heating wire 22 sinks into the groove 2110, preventing physical damage to the heating wire 22 during production. In other embodiments, the groove 2110 can also be designed as a frustum shape that is wider at the top and narrower at the bottom, so that the sidewalls of the groove are inclined to form a slope, preventing the middle part of the heating wire 22 from sinking into the groove 2110 and bending at a right angle, thus avoiding physical damage to the heating wire 22.

[0046] In a preferred embodiment, the primer plate 21 further includes a third primer plate 213, which is a PCB board. The third primer plate 213 is stacked and fixedly disposed at the bottom of the second primer plate 212. The third primer plate 213 is provided with a third-layer first conductive part 2131 and a third-layer second conductive part 2132 that are conductive from the bottom to the top of the third primer plate 213. The top of the third-layer first conductive part 2131 is conductive to the bottom of the second-layer first conductive part 2121, and the top of the third-layer second conductive part 2132 is conductive to the bottom of the second-layer second conductive part 2122. By setting a third primer plate 213, the airtightness of the primer 2 can be increased, so that when the gunpowder burns in the groove 2110, the thrust and energy of the gas generated on the second primer plate 212 can be dispersed and reduced through the third primer plate 213, thereby reducing the impact on the second primer plate and preventing the gap between the first primer plate and the second primer plate from widening further.

[0047] In this embodiment, please refer to Figure 8 and Figure 9 The bottom of the second layer first conductive part 2121 and the bottom of the second layer second conductive part 2122 are respectively annular; the top of the third layer first conductive part 2131 and the top of the third layer second conductive part 2123 are respectively annular corresponding to the bottom of the second layer first conductive part 2121 and the bottom of the second layer second conductive part 2122; the bottom of the annular second layer first conductive part 2121 and the top of the annular third layer first conductive part 2131 are welded to each other, and the bottom of the annular second layer second conductive part 2112 and the top of the annular third layer second conductive part 2132 are welded to each other.

[0048] In this embodiment, the first primer plate 211, the second primer plate 212, and the third primer plate 213 are all made of PCB boards. PCB boards can easily achieve the conduction of the first conductive part 2111, the second conductive part 2121, and the third conductive part 2131 of the first layer, as well as the conduction of the second conductive parts 2112, the second conductive part 2122, and the third conductive part 2132 of the first layer, while also reducing costs and improving production efficiency.

[0049] In this embodiment, the primer 2 also includes primer powder (not shown), which is disposed in the groove 2110 and fixed to the heating wire 22.

[0050] Example 2

[0051] This embodiment provides a firework shell; please refer to [link / reference]. Figure 4The device includes a shell 1 and a primer 2 as described in Embodiment 1. The shell 1 has a cavity 10, and the primer 2 is disposed at the bottom of the shell 1. The cavity 10 communicates with the groove 2110 of the primer 2. Specifically, in this embodiment, the shell 1 and the primer 2 of the firework cartridge are integrally formed. The bottom of the firework cartridge is formed on the outer side of the primer plate 21, so that the groove 2110 of the primer 2 faces the inner side of the shell 1 and communicates with the cavity 10 of the shell 1. This allows the firework gunpowder to fall into the groove 2110 and contact the primer gunpowder after it is loaded into the cavity of the shell. The bottom of the third primer plate 213 faces the outer side of the bottom of the shell 1, so that the positive and negative terminals of the power supply are respectively connected to the bottom of the third layer first conductive part 2131 and the bottom of the third layer second conductive part 2132.

[0052] Example 3

[0053] This embodiment provides a firework, including a firework shell, firework gunpowder (not shown), and firework projectile (not shown) as in Embodiment 2; the gunpowder and firework projectile are respectively assembled in the firework shell; wherein, the firework gunpowder is located in the cavity and groove 2110.

[0054] The fireworks of the present invention have fireworks gunpowder assembled in the cavity 10 of the shell 1. The fireworks gunpowder can fall into the groove 2110 from the cavity 10 and come into contact with the primer gunpowder. The bottom of the third layer first conductive part 2131 and the bottom of the third layer second conductive part 2132 are respectively connected to the positive and negative terminals of the power supply, realizing the circuit of "power supply positive terminal - third layer first conductive part 2131 - second layer first conductive part 2121 - first layer first conductive part 2111 - heating wire 22 - first layer second conductive part 2112 - second layer second conductive part 2122 - third layer second conductive part 2132 - power supply negative terminal". The heating wire 22 heats up and ignites the gunpowder in the groove 2110, thereby igniting the gunpowder in the cavity 10.

[0055] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and the present invention also intends to include these modifications and variations.

Claims

1. A primer, characterized by: The primer plate comprises a primer plate and an electric heating wire; The primer plate comprises a first layer of primer plate and a second layer of primer plate arranged in a stack, and the second layer of primer plate is fixedly arranged at the bottom of the first layer of primer plate; wherein the first layer of primer plate is provided with a vertical through hole, and the through hole and the top of the second layer of primer plate form a groove; the bottom of the first layer of primer plate is provided with at least one first annular pad surrounding the through hole, and the top of the second layer of primer plate is provided with at least one second annular pad corresponding to the first annular pad, and the first annular pad and the second annular pad are welded with each other; the first layer of primer plate is respectively provided with a first layer of first electric lead and a first layer of second electric lead from the bottom of the first layer of primer plate to the top of the first layer of primer plate; the second layer of primer plate is respectively provided with a second layer of first electric lead and a second layer of second electric lead from the bottom of the second layer of primer plate to the top of the second layer of primer plate; the bottom of the first layer of first electric lead is in communication with the top of the second layer of first electric lead, and the bottom of the first layer of second electric lead is in communication with the top of the second layer of second electric lead. The electric heating wire is arranged at the top of the first layer of primer plate, one end of the electric heating wire is fixedly connected with the top of the first layer of first electric lead, the electric heating wire extends from the top of the first layer of first electric lead to the top of the first layer of second electric lead through the groove, and the other end of the electric heating wire is fixedly connected with the first layer of second electric lead.

2. The primer of claim 1, wherein: The first layer of primer plate and the second layer of primer plate are both PCB plates.

3. The primer of claim 1, wherein: The bottom of the first layer of first electric lead and / or the bottom of the first layer of second electric lead is annular around the through hole; the top of the second layer of first electric lead and / or the top of the second layer of second electric lead is annular; the first annular pad is the bottom of the first layer of first electric lead and / or the bottom of the first layer of second electric lead; and the second annular pad is the top of the second layer of first electric lead and / or the top of the second layer of second electric lead.

4. The primer of claim 1, wherein: The middle part of the electric heating wire is sunken into the groove.

5. The primer of claim 4, wherein: The top of the first layer of first electric lead and the top of the first layer of second electric lead are respectively located on both sides of the through hole.

6. The primer of claim 5 wherein: The side wall of the through hole is further provided with a first groove and a second groove; the electric heating wire extends from the top of the first layer of first electric lead to the top of the second layer of second electric lead through the first groove, the groove and the second groove in sequence.

7. The primer of claim 4 wherein: The primer plate further comprises a third layer of primer plate, the third layer of primer plate is a PCB plate, and the third layer of primer plate is fixedly arranged at the bottom of the second layer of primer plate in a stack; the third layer of primer plate is respectively provided with a third layer of first electric lead and a third layer of second electric lead from the bottom of the third layer of primer plate to the top of the third layer of primer plate; the top of the third layer of first electric lead is in communication with the bottom of the second layer of first electric lead, and the top of the third layer of second electric lead is in communication with the bottom of the second layer of second electric lead.

8. The primer of claim 7, wherein: The primer powder is arranged in the groove and fixed with the electric heating wire.

9. A firework shell, characterized by: The shell has a cavity, and the primer is arranged at the bottom of the shell, and the cavity is communicated with the groove of the primer.

10. A firework, characterized by: The firework shell, the firework powder and the firework pellet are arranged in the firework shell.

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