Firework rod

Abstract

A firework rod comprises: a housing; the flow guide pipe is provided with a first opening; the hopper is rotatably arranged on the periphery of the flow guide pipe in a sleeving mode, a second opening is formed in the hopper, and the hopper is provided with a first position and a second position; the fuel tank is provided with an air outlet valve; the ignition assembly is arranged in the shell and used for igniting the combustible gas output from the flow guide pipe; the operation assembly is arranged on the surface of the shell and is configured to sequentially open the gas outlet valves and trigger the ignition assembly when being stressed; the first linkage assembly is arranged in the shell, connected with the operation assembly in a linkage mode and used for driving the hopper to rotate from the first position to the second position when the operation assembly is stressed. Through the arrangement of the rotatable hopper and the linkage mechanism, combustible metal powder is automatically and quantitatively guided into a combustion gas flow while ignition operation is achieved, operation is simplified, and the consistency and safety of the effect are improved. And meanwhile, metal powder can be prevented from entering the flow guide pipe to block the pagoda when the pagoda is not used.

Description

Technical Field

[0001] This invention relates to the field of fireworks technology, specifically to a fireworks stick. Background Technology

[0002] Traditional sparklers are typically based on the principle of gunpowder combustion, producing light, color, and spark effects by igniting a mixture of gunpowder and metal particles. These products pose a risk of open flame, produce smoke and irritating gases, and are disposable, making them both environmentally unfriendly and unsafe. Furthermore, their combustion process and effects are uncontrollable. In response, a new alternative to traditional gunpowder sparklers has been introduced to the market: cold sparklers. These are made from metal powders with a low ignition point, ranging from 60 to 80 degrees Celsius.

[0003] These types of fireworks are typically refilled with metal powder, allowing them to be reused. However, the conventional operation is rather cumbersome, requiring ignition before starting the feeding mechanism. Therefore, a more convenient operating method is needed. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a firework stick.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A sparkler comprising: case; A guide tube is disposed inside the housing along the axial direction therein, and its bottom circumferentially has at least one first opening; A hopper for storing combustible metal powder is rotatably sleeved on the outer periphery of the guide tube, and the part of the hopper that contacts the guide tube is provided with at least one second opening. The hopper has a first position in which the second opening is misaligned with the first opening and a second position in which at least a portion of the second opening is in relative communication with the first opening. A fuel tank is provided with an exhaust valve, and the exhaust valve is connected to the guide pipe; An ignition assembly, located inside the housing, is used to ignite the combustible gas output from the guide pipe; An operating component is disposed on the surface of the housing and is configured to sequentially open the exhaust valve and trigger the ignition component when subjected to force; The first linkage component is located inside the housing and is linked to the operating component, and is used to drive the hopper to rotate from the first position to the second position when the operating component is subjected to force.

[0006] A reset element is provided between the hopper and the housing to drive it to rotate from the second position back to the first position.

[0007] The bottom of the hopper extends downward to form a drive rod. The first linkage component has a first force-receiving part and a first drive part. The first force-receiving part is in contact with the operating component, and the first drive part is linked with the drive rod.

[0008] The first linkage component is rotatably disposed within the housing.

[0009] The operating components include: A button, one end of which is hinged inside the housing, partially protruding from the housing to form an operating position; The second linkage component is rotatably disposed within the housing. It has a second force-receiving part, a second driving part, and a third driving part. The second force-receiving part is disposed when in contact with the button. The second driving part is attached to the trigger end of the ignition component. The third driving part is linked to the first force-receiving part.

[0010] A linkage rod is provided between the third driving part and the first force receiving part.

[0011] The housing includes a separable upper assembly and a lower assembly. The upper component is provided with a first end face at its end, and the first end face is provided with a first fluid channel and a first electrical connection part communicating with the guide pipe; The lower component has a second end face opposite to the first end face. The second end face has a second fluid channel communicating with the gas outlet valve and a second electrical connection part electrically connected to the ignition component. When the upper component and the lower component are connected, the first end face and the second end face are abutted, so that the first fluid channel and the second fluid channel are connected and form a sealed connection, and the first electrical connection part and the second electrical connection part are in contact to form an electrical connection. The inlet end of the first fluid channel is connected to a detachable pagoda, which is sealed and connected to the outlet end of the second fluid channel.

[0012] The upper end of the shell is also provided with a detachable disposable hopper, which is sleeved on the outside of the guide pipe. The upper end face of the shell is provided with a feeding groove, which is connected to the opening of the disposable hopper and is located above the hopper.

[0013] The disposable hopper includes: A container having a material storage chamber inside, the material storage chamber having at least one material storage opening; A first quick-release connection part is provided on the container for quick connection and disassembly with the shell; A sealing cap is connected to the opening of the material cavity in a breakable manner; When the container is installed onto the housing via the first quick-release connector, the housing can apply force to the sealing cap to cause it to break, thereby opening the material chamber opening.

[0014] The upper end of the housing is also provided with a rupture actuator. When the disposable hopper is installed on the upper end of the housing and rotates relative to it, the rupture actuator can interact with the sealing cover of the disposable hopper and rupture it.

[0015] The beneficial effects of this invention are as follows: By setting up a rotatable hopper and linkage mechanism, combustible metal powder is automatically and quantitatively introduced into the gas flow during ignition, simplifying operation and improving the consistency and safety of the effect. It also prevents metal powder from entering the guide pipe and clogging the pagoda when not in use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure when the upper and lower components of the present invention are separated.

[0018] Figure 3 This is a schematic diagram of the structure of the upper component of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the lower component of the present invention.

[0020] Figure 5 This is a schematic diagram of the structure of the lower component (hidden second electrical connection part) of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the disposable hopper when separated from the shell according to the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the disposable hopper of the present invention.

[0023] Figure 8 This is a schematic diagram of the structure of the present invention in the first position.

[0024] Figure 9 This is a partial schematic diagram of the invention in the second position.

[0025] Figure 10 This is a schematic diagram of the internal structure of the present invention. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1 and Figure 2 As shown, the present invention discloses a firework stick, which includes a shell and a guide pipe 400, a hopper 600, a fuel tank 900, an ignition assembly 800, an operation assembly 500 and a first linkage assembly 700 disposed within the shell.

[0028] The housing, serving as the overall support structure, adopts a detachable design in this embodiment, comprising an upper component 100 and a lower component 200. The upper component 100 primarily houses the guide pipe 400 and the hopper 600, and is detachably connected to the disposable hopper 300. In some embodiments, the disposable hopper may be an integral, non-detachable hopper integrated into the upper component. The lower component 200 primarily houses the fuel tank 900, the ignition assembly 800, and the operating assembly 500, etc.

[0029] The guide tube 400 is fixedly installed inside the upper component 100 along the axial direction (usually vertical) of the housing, serving as the final mixing and ejection channel for the combustible gas and combustible metal powder. At least one first opening 410 is circumferentially formed on its bottom wall, which is the only inlet for the powder to enter the internal cavity of the guide tube. During operation, the combustible metal powder enters the guide tube through this opening and is then induced and mixed with the high-speed flowing combustible gas before being ejected.

[0030] The hopper 600 is used to store a fixed quantity of combustible metal powder (such as magnesium powder, aluminum powder, etc.). It is coaxially and rotatably fitted around the outer periphery of the guide tube 400, with a tight clearance fit between them, which ensures smooth relative rotation and effectively prevents unintended leakage of powder from the side wall. At least one second opening 620 is provided on the side wall of the hopper 600 where it contacts the outer wall of the guide tube 400. This second opening 620 is a channel connecting the inner cavity of the hopper to the outside (i.e., the first opening of the guide tube).

[0031] First position (off state): such as Figure 8As shown, in this initial or reset state, the hopper 600 is held at a specific angle by the preload of a reset element (such as a tension spring), ensuring that the second opening 620 on its side wall is completely offset from and does not overlap with the first opening 410 on the wall of the guide tube 400 in the circumferential direction. At this time, the solid portion of the guide tube 400 completely blocks the second opening 620 of the hopper 600, and from the inside of the hopper, its powder outlet is physically blocked by the outer wall of the guide tube. Therefore, the powder stored in the hopper 600 is effectively sealed in the inner cavity and cannot enter the guide tube 400, achieving the cutting off and sealing of the powder supply.

[0032] Second position (on): such as Figure 9 As shown, when an external operating force is applied to the hopper 600 through the first linkage component, the hopper overcomes the resistance of the reset component and rotates around the axis of the guide tube 400 by a predetermined angle. This rotation causes the second opening 620 on the hopper 600 and the first opening 410 on the guide tube 400 to at least partially overlap, align, and communicate with each other in the circumferential direction. The overlapping area of ​​the two openings forms a continuous powder flow channel from the inner cavity of the hopper through the second opening 620 and then through the first opening 410 into the interior of the guide tube 400. At this time, the powder stored in the hopper 600 is quantitatively and controllably injected into the guide tube 400 through this open flow channel under the influence of gravity and subsequent airflow.

[0033] The fuel tank 900 is fixedly installed inside the lower assembly 200 of the firework stick, typically existing as a separate replaceable or refillable module. In this embodiment, it is a refillable module, meaning it is directly fixed inside the lower assembly. Its main body is a sealed pressure vessel used to store liquid or gaseous fuel, such as liquefied butane. The upper end of the fuel tank 900 is equipped with a vent valve 910, which is typically a normally closed mechanical valve. In the non-operating state, the vent valve 910 remains closed, sealing the fuel within the tank. When operation is required, the rocker arm of the vent valve 910 is pressure-opened, and the fuel, driven by internal pressure, is stably released in gaseous form through a connected fluid pipeline. In some designs, the vent valve 910 also includes a flow regulating gear 920, which, through an adjusting assembly 930, adjusts the amount of gas released to control the flame size.

[0034] The ignition assembly 800 is a device that generates an ignition spark and is also mainly integrated within the lower assembly 200. In this embodiment, a piezoelectric igniter is used. Its working principle is to generate a momentary high voltage in the piezoelectric ceramic element through mechanical impact (usually linked to an operational action), forming an electric spark in the discharge gap. Its triggering end (such as the force point of the piezoelectric striker) is designed to be driven or triggered by an external mechanism (such as an operating component). The discharge spark position of the ignition assembly 800 is typically precisely aligned with the gas ejection area of ​​the guide tube 400 to ensure reliable ignition of the combustible mixture.

[0035] like Figure 10 As shown, the operating component 500 is disposed on the surface of the housing (e.g., the side) to receive the user's pressing pressure. The first linkage component 700 is disposed inside the housing (upper component 100), which transmits the action of the operating component 500 to the hopper 600. The operating component 500 is typically disposed on the side of the housing or in another easily accessible position for thumb operation in the form of a button or trigger, to receive single, continuous, or controllable pressing pressure from the user. Its interior is not merely a simple point of force application, but often integrates multi-stage force transmission and distribution mechanisms. When pressed, the operating component 500 sequentially triggers the corresponding mechanisms, such as the rocker arm that opens the exhaust valve, the trigger end of the ignition component, and the first linkage component 700.

[0036] The first linkage component 700 converts the input motion, typically linear or with a specific arc, from the operating component 500 into an output motion that drives the hopper 600 to rotate precisely around the axis of the guide tube 400. This conversion process can be achieved through mechanical principles such as levers, connecting rods, cams, or racks and pinions. Therefore, the first linkage component 700 dedicates a separate force transmission path to the main operating actions of ignition and gas supply, synchronously controlling the rotation of the hopper 600.

[0037] In this embodiment, the first linkage component 700 serves as the actuator for driving the hopper 600 to rotate, and its main body is typically a rigid lever or swing arm. It is rotatably mounted within the housing (specifically located in the lower component 100) via a rotating shaft, which provides a stable pivot point. The mounting method can be a shaft-hole fit or fixation via a bearing seat, ensuring that it can only swing with a single degree of freedom around a fixed axis. The first linkage component includes a first force-receiving part 720 and a first driving part 710, wherein: First force-receiving part 720: Located on the side closest to the operating component 500. It is typically designed as a protrusion, plane, or groove to directly or indirectly receive forces or displacements transmitted from the operating component 500.

[0038] First drive unit 710: Located on the other side, it is in a lever relationship with the first force-receiving unit 720 relative to the pivot. The end of the first drive unit 710 is configured to be effectively linked with the drive rod 620 of the hopper 600, for example, a hook-shaped, fork-shaped, or roller-equipped contact surface.

[0039] The hopper 600 must remain closed (first position) when not in operation. To this end, a reset element 610, typically a tension spring fitted around the outside of the guide tube 400, is provided between the hopper 600 and the housing (or fixed bracket). One end of the tension spring is fixed to the housing, and the other end acts on the hopper 600, applying a continuous torsional torque toward the first position.

[0040] To transmit the motion of the first linkage assembly 700 to the hopper 600, a drive rod 620 extends downward from the bottom of the hopper 600. This drive rod 620 can be a simple pin or a lug. When the first linkage assembly 700 rotates, its first drive part 710 pushes or pulls the drive rod 620, thereby converting the oscillation of the first linkage assembly 700 into the rotation of the hopper 600 around the axis of the guide tube.

[0041] The operation component 500 includes: Button 510: This is a component that is directly operated by the user. One end of it is mounted inside the housing via a hinge shaft, while the other end (or the middle) protrudes from the housing to form a pressing area. When pressed, button 510 rotates around the hinge point.

[0042] Second linkage component 520: This is a core power distribution and conversion mechanism. Rotatably mounted within the housing (located in the lower component 100) via a pivot, it functions similarly to a multi-directional rocker arm. It has three functional ends: Second force-receiving part 523: This part contacts the inner side of button 510. When button 510 is pressed, it acts on the second force-receiving part 523, forcing the second linkage assembly 520 to start rotating. In order to ensure that the button acts on the second force-receiving part, it is preferable to form a force-applying protrusion extending from the inner side of the button toward the second force-receiving part.

[0043] Second drive unit 521: This part is responsible for controlling ignition. When the second linkage assembly 520 rotates, the second drive unit 521 will generate a downward displacement or impact. This action connects to the trigger end of the ignition assembly 800 (such as the striker button of a piezoelectric igniter) through a preset path inside the housing, thereby triggering the generation of a spark.

[0044] The third drive unit 522 is responsible for transmitting motion to the first linkage component 700. As the second linkage component 520 rotates, it outputs displacement in another direction; in this embodiment, it transmits vertical displacement.

[0045] Since the operating component 500 (second linkage component 520) and the first linkage component 700 may be some distance or angle apart in space, direct contact transmission is not efficient or precise enough. Therefore, a linkage rod 730 is provided between the third driving part 522 and the first force receiving part 720. The two ends of this linkage rod 730 are respectively linked to the third driving part 522 and the first force receiving part 720. Its function is to transmit the motion of the third driving part 522 to the first force receiving part 720 with almost no loss, although the direction may change, thereby driving the first linkage component 700 to rotate.

[0046] In order to further synchronize the gas valve and the ignition assembly, a drive sleeve is provided on the trigger end of the ignition assembly. The linkage opening rocker of the gas valve is locked below the drive sleeve. Therefore, when the second linkage component acts on the drive sleeve, it will synchronously drive the rocker to move. This linkage structure is a common structure in lighters, so it will not be described in detail.

[0047] For safety reasons, a horizontally sliding safety switch 530 can be provided on the housing. When the safety switch slides horizontally, it will be in the pressing path of the button, thus restricting its action. This structure is a conventional technical means in this field, so it will not be described in detail.

[0048] like Figure 3 As shown, the upper component 100 typically includes a cylindrical outer shell, which is precision cast from a high-temperature resistant, insulating engineering plastic (such as PEEK, reinforced nylon) or a lightweight alloy. An internal guide tube 400 is encapsulated within the outer shell, forming the main flow path within the upper component 100. The upper end of the guide tube is used to fix or form the final injection outlet, and its lower end extends and converges at the bottom plane of the upper component 100, the lower plane of which forms the first end face 110.

[0049] A first fluid channel 111 is precisely formed at the center of the first end face 110. This channel is essentially an opening of an internal guide tube on the end face, used to receive fuel (such as combustible gas) from the lower component 200. In a preferred embodiment, the guide tube is designed to extend directly and terminate at the first end face 110, so that the inlet of the first fluid channel 111 coincides with the outlet of the guide tube, resulting in a simpler and smoother structure. The inlet end of the first fluid channel 111 (i.e., the end facing the lower component) is machined with internal threads for detachably connecting to the pouch 112. The pouch 112 is typically a metal (such as brass or stainless steel) nozzle with external threads. Through the threaded connection, the operator can easily unscrew the pouch clogged with metal powder and replace it with a new one.

[0050] A first electrical connection portion 113 is also provided on the first end face 110 beside the first fluid channel 111. In this embodiment, the first electrical connection portion 113 is specifically implemented as a piece or a group of slightly arched metal contact bridges. The contact bridge is usually made of phosphor bronze or beryllium copper material with good elasticity and conductivity, and is firmly set in the insulating shell of the upper component 100 by embedding injection molding or snap-fit ​​fixing. Its arched shape design is crucial: when the upper component 100 docks with the lower component 200, this arched structure can provide downward pressure on the corresponding second electrical connection portion on the lower component 200, thereby maintaining stable contact. It uses the elastic deformation of the metal itself to generate continuous and stable contact pressure, thereby ensuring that the transmission of ignition signal or control current remains reliable and uninterrupted under high-frequency vibration or slight shaking. The end of the metal contact bridge is connected to the wire of the ignition head embedded inside the upper component 100, forming a complete ignition path.

[0051] The lower component 200 typically includes a main housing. This housing is often made of metal (such as aluminum alloy) or high-strength engineering plastics, and its interior is precisely designed to house and secure the various functional subsystems. Inside the housing are a fuel tank and an ignition assembly. The fuel tank (which stores liquefied gases such as propane and butane) is connected to a second fluid channel via an outlet valve.

[0052] like Figure 4 and Figure 5 As shown, the top of the lower component 200 is precision machined to form a second end face 210 that precisely matches the first end face 110 of the upper component 100. The flatness and perpendicularity of this end face are strictly controlled to ensure a tight fit of the sealing surface when it is mated with the upper component.

[0053] A second fluid channel 211 is precisely formed at the center of the second end face 210. This second fluid channel is directly connected to the internal exhaust valve, serving as the final outlet for upward fuel delivery. Its port edges are often chamfered or polished to facilitate a good seal with the sealing ring at the end of the pagoda 112.

[0054] Beside the second fluid channel 211, a mounting portion 214 is integrally formed or fixedly mounted on the second end face 210. The top surface of the mounting portion 214 is flush with the second end face 210, forming a smooth and continuous mating plane to avoid interference during mating. The mounting portion 214 has a mounting groove 215 inside, the geometry of which (e.g., circular or square) is designed to precisely fix and limit the second electrical connection portion 213.

[0055] like Figure 5As shown, a dedicated wire channel (or cable passage) extends from the bottom of the mounting groove 215 (i.e., deep away from its opening). This wire channel serves as a guide and containment space for the internal wiring harness, and its path is optimized to guide the wiring harness with a smooth arc, avoiding sharp bends. The ends of the electrical connection wiring harness from inside the lower component 200 (e.g., a piezoelectric ignition device or electronic control module) are carefully arranged and placed within this wire channel. The conductor ends of the wiring harness are connected to the tail of the second electrical connection portion 213 fixed in the mounting groove 215 by means of welding, crimping, or screw connection, forming a stable electrical and mechanical connection.

[0056] The cable tray confines the cable harness within a preset path, preventing tangling, wear, or accidental detachment that may result from the cable harness swinging erratically within the cavity.

[0057] Mounting section 214 is typically made of insulating material or is insulated. The structure of mounting groove 215 and wire trough physically isolates live metal connections and wire harness connectors from the external metal housing or other components, enhancing electrical safety during use.

[0058] In this embodiment, the second electrical connection 213 is specifically implemented as a pair of metal springs (e.g., made of special spring steel or copper alloy). One end of each metal spring is securely fixed in the mounting groove 215, which can be achieved by snapping into a prefabricated claw structure, using micro screws, or bonding with conductive adhesive. One end of each metal spring is reliably connected to the insulated wire harness from the high-voltage output terminal of the piezoelectric ignition device inside the lower assembly 200 by precision welding or crimping, thereby transmitting the generated high-voltage ignition pulse to the interface. The free end of the metal spring is prefabricated into an elastic cantilever structure with a specific curvature.

[0059] When the upper component 100 is mated, its metal contact bridge (first electrical connection 113) presses down on the free end of the spring, and the spring generates a continuous and stable rebound force through its own elastic deformation. This force ensures that the electrical contact interface (between the metal spring and the metal contact bridge) maintains a tight and reliable electrical contact even in the presence of slight vibration or manufacturing tolerances, thereby ensuring that ignition high voltages of up to several thousand volts can effectively and without loss cross the interface and reliably ignite the fuel.

[0060] The first fluid channel 111 and the second fluid channel 211 are precisely aligned on the axis, thereby connecting the fuel supply path in the lower component 200 with the guide injection path in the upper component 100. Specifically, the outlet end of the first fluid channel 111 (i.e., the end facing the second end face) is connected to a detachable pagoda 112. During the docking process, the inlet end (root) of the pagoda 112 actively inserts into or tightly abuts against the outlet end of the second fluid channel 211 (i.e., the port facing the upper component).

[0061] To ensure leak-free fuel transfer, at least one annular sealing ring (such as an O-ring) is provided on the cylindrical root surface of the pagoda 112 or on the inner wall / end face of the outlet end of the second fluid channel 211. When the upper and lower components are pressed together by the locking mechanism, radial or axial compressive force is generated between the pagoda 112 and the outlet end of the second fluid channel 211, causing the sealing ring to elastically deform, thereby forming one or more reliable static sealing barriers between them. This design concentrates the critical sealing interface on the replaceable pagoda 112, rather than on the non-replaceable main body mating surface, which reduces the impact of long-term wear of the sealing surface on the overall equipment and facilitates the restoration of sealing performance by replacing the pagoda 112 or its sealing ring.

[0062] Simultaneously, the electrical connection components on both end faces also complete the docking. The first electrical connection 113 (the slightly arched metal contact bridge as described above) and the second electrical connection 213 (the metal spring as described above) make physical contact under the action of axial clamping force. The elastic design of the metal spring causes it to bend and deform when it comes into contact with the metal contact bridge, and the elastic energy stored in this deformation is continuously converted into positive pressure at the contact interface.

[0063] Meanwhile, the second end face is provided with a space for installing the first linkage component. When the two are in cooperation, the drive rod of the hopper is inserted into the space and linked with the first linkage component.

[0064] In other embodiments, the second electrical connection may also be a spring pin or an elastic metal wire.

[0065] The mechanical connection mechanism can theoretically adopt various mature forms, including but not limited to at least one of snap-fit ​​connections, threaded connections, pin-locking connections, or quick-release clamp connections. Each form has its own characteristics: threaded connections have high reliability but slow operation speed; pin-locking requires additional components; quick-release clamps may have a slightly more complex structure. Taking into account operational efficiency, connection strength, and structural simplicity, in a preferred embodiment of the present invention, the mechanical connection mechanism is specifically implemented as a quick-release rotary snap-fit ​​structure.

[0066] The specific implementation method of this quick-release rotary buckle structure is as follows: On the cylindrical surface of the outer shell of the lower component 200, near the second end face 210, at least two protrusions or first locking blocks 212 are provided symmetrically distributed in the circumferential direction. These first locking blocks 212 can be metal or high-strength plastic bosses integrally formed with the lower component shell, or they can be independent metal pins assembled later. Their outer contours are usually designed as rectangles or trapezoids with guide rounded corners.

[0067] At corresponding positions on the inner wall of the upper component 100, slots 114 are precisely machined to perfectly match the number, size, and distribution of the first locking blocks 212. Each slot 114 consists of an axially extending straight groove section (i.e., the inlet) and an annular or spiral locking groove section connected to the end of the straight groove section. The width of the straight groove section is slightly larger than the width or diameter of the first locking block 212, allowing the first locking block 212 to be inserted axially without obstruction. The annular locking groove section extends circumferentially, and its depth or path design ensures that when the first locking block 212 slides into this section, the upper and lower components are axially locked together and cannot be directly pulled out.

[0068] The connection (locking) operation process is as follows: Alignment and insertion: Place the upper component 100 onto the lower component 200, so that the inlet of the straight groove section of the slot 114 on the inner wall of the upper component is precisely aligned with the first slot 212 on the lower component.

[0069] Axial pressing: Push the upper component 100 axially, and the first locking block 212 slides in along the straight groove until the first end face 110 and the second end face 210 are close to or slightly in contact. At this time, the pagoda 112 and the second fluid channel 211, and the first electrical connection part 113 and the second electrical connection part 213 are initially aligned.

[0070] Rotation Locking: Hold the upper component 100 or the lower component 200 and rotate them relative to each other by a preset angle (typically 15° to 90°). During this rotation, the first locking block 212 slides into the straight groove section and moves along the annular locking groove section. The geometry of the annular locking groove is designed to form a locking recess or ramp at the end of the rotation, which generates an axial component force that pulls the upper component 100 toward and presses it against the lower component 200. When rotated into place, a clear "click" sound or tactile sensation is often heard, indicating that the first locking block 212 has fully entered the locked position. This final state achieves: Axial locking: prevents the upper and lower components from accidentally separating under vibration or load.

[0071] End face compression seal: Ensures that the two end faces fit tightly together, providing a guarantee for the sealing of the fluid passage and the pressure of the electrical connection.

[0072] The separation (unlocking) operation is completely reversed: rotate the upper component 100 in the opposite direction until the first locking block 212 returns to the straight groove section, and it can be easily pulled out axially. Then, the pagoda can be disassembled and assembled directly by rotating the pagoda.

[0073] like Figure 6As shown, the upper end of the shell is also provided with a detachable disposable hopper 300. The disposable hopper 300 is sleeved on the outside of the guide pipe 400, and the upper end face of the shell is provided with a feeding groove 121. The feeding groove 121 is connected to the hopper opening 320 of the disposable hopper 300 and is located above the hopper 600.

[0074] like Figure 7 As shown, the disposable hopper includes a container 310, a quick-release connector 340, and a sealing cap 330. The container 310 is typically injection molded from plastic and has an annular cavity inside for storing materials used to create fireworks effects. The materials are preferably combustible metal powders such as magnesium powder, aluminum powder, and iron powder, or mixtures thereof, used to produce specific flame color reactions and combustion effects. The cavity has at least one cavity opening 320. In this embodiment, two symmetrically distributed arc-shaped cavity openings 320 are provided to facilitate smoother and more uniform discharge of the powder materials.

[0075] The container has an overall ring-shaped structure, with a through-hole running vertically through its center. This through-hole allows the vent pipe (or central support shaft) of the fireworks stick or related equipment to pass through it. This ring-shaped, split structure achieves physical separation and integration of the effect material bin and the vent pipe, ensuring the independence of powder storage without affecting the operation of other functions of the equipment. The structural design is ingenious and compact.

[0076] Meanwhile, the bottom inner side of the container is equipped with a quick-release connector 340, which is used to quickly connect and lock the hopper to the upper part of the shell. Its core function is to guide users to complete the secure installation or removal of the hopper in a few seconds through a simple straight insertion and rotation (or pressing the buckle) action, which greatly improves the replacement efficiency and user experience.

[0077] The sealing cap 330 is connected to the opening of the material chamber in a breakable manner. It is typically made of aluminum foil composite material, easily tearable composite plastic film, or weakened plastic sheet; in this embodiment, a plastic sheet is used. It forms an airtight seal with the edge of the container opening through hot pressing, laser welding, or strong adhesive. The function of this sealing cap is to ensure that the metal powder inside the material chamber is completely isolated from external air and moisture before transportation, storage, and installation, preventing it from becoming damp, oxidizing, or leaking. Its breakable nature means that when the hopper is installed in place via the quick-release connection, a specific puncture or bursting mechanism on the fireworks rod body can apply force to cleanly and thoroughly open the cap, allowing the material to smoothly enter the next stage.

[0078] The quick-release connector 340 consists of two L-shaped slots symmetrically distributed along the circumference of the container. Each L-shaped slot comprises an inlet section 341 extending axially (vertically) along the container and a locking section 342 communicating with the bottom of the inlet section 341 and extending at approximately 45 degrees circumferentially (horizontally) along the container. At the end of the locking section 342, a small positioning protrusion 343 is provided to provide a clear tactile feel during assembly and to prevent loosening by reverse rotation. The bottom end face of the container 310 is also machined with an annular groove in which an O-ring silicone sealing ring 360 is embedded to provide auxiliary sealing at the interface when the hopper is installed onto the fireworks stick, preventing dust from escaping.

[0079] The container 310 is configured to rotate about its axis relative to the firework stick, and the breaking of the sealing cap 130 is driven by the rotational action of the container 310 from the initial docking position to the locked breaking position.

[0080] Initial docking position: This is the state when the hopper container 310 and the main body of the firework stick have completed the initial physical docking. Specifically, the axis of the container 310 is aligned and coincident with the axis of the corresponding mounting seat on the firework stick; the container 310 moves along this axis (usually vertically downward), so that its quick-release connection part (such as the inlet section of the L-shaped slot) initially engages or aligns with the connecting parts (such as the locking block) on the firework stick; the bottom end face of the container 310 is close to or just in contact with the upper end face of the firework stick mounting seat.

[0081] In the initial docking position, container 310 has completed its spatial positioning and initial load-bearing, but the quick-release connection is not yet locked, allowing the container to move slightly along the axial direction or rotate around the axis. At this time, the sealing cap 330 and the puncture actuator (such as a spike or boss) on the firework stick may be in slight contact or in a state of minimal clearance fit, but no interaction force sufficient to destroy the seal has yet occurred. This position is the starting point and safety reference point for dynamic operation.

[0082] Locking position: This is the final state reached after container 310 rotates around its common axis by a certain angle (e.g., between 15° and 60°) from its initial docking position. At this point, the quick-release connection is locked (e.g., the locking block slides into the inlet section of the L-shaped slot and locks itself at the end of the locking section); container 310 and the firework stick can no longer rotate freely relative to each other or separate axially.

[0083] Reaching the locked break position signifies the completion of the installation process and its self-locking. More importantly, the rotation from the initial docking position to the locked break position directly drives and completes the breaking action of the sealing cap 330. The container is securely fixed in this position, with the material chamber opening perfectly aligned with the feed channel of the fireworks rod, ready for operation.

[0084] The sealing cap 330 has a puncture protrusion 350 on the side facing the firework stick. The puncture protrusion 350 is a locally reinforced structure formed three-dimensionally from the sealing cap 330 body towards the firework stick (i.e., outward). It is usually located in the central area of ​​the sealing cap or on the movement trajectory of the firework stick's puncture actuator. Its material is the same as the cap body, but its rigidity and guiding ability can be enhanced by increasing the local thickness or changing the material composite method. The puncture protrusion 350 is the core force point that receives and transmits the puncture force. It is not a passive puncture point, but an active force transmission medium and motion guide. Its design goal is to effectively convert the force applied by the firework stick's puncture actuator into a tearing or pushing force on the surrounding cap material.

[0085] Guide ramp 351: This ramp is an inclined surface formed on one or both sides of the rupture protrusion 350. Its inclination angle (relative to the sealing cap plane) is carefully designed, typically between 15° and 60°, to balance the effort-saving effect with structural strength.

[0086] The guide ramp 351 is a key conversion element for achieving rotation-driven linear or lateral rupture. Its core function is to maintain continuous sliding contact with the rupture actuator (such as a fixed conical needle or protrusion) on the firework stick during the rotation of the container 310.

[0087] When the container 310 rotates, the guide ramp 351 guides the corresponding component on the firework stick to interact with the puncture protrusion 350. The specific process is as follows: Rotational initiation and contact with the inclined plane: When the container 310 begins to rotate, the rupture actuator fixed to the firework bar begins to move in a circular motion relative to the container. Since the rupture actuator is fixed, while the container equipped with the guide inclined plane 351 is rotating, this actually manifests as the guide inclined plane 351 sweeping across the tip of the rupture actuator.

[0088] The guide and force conversion of the inclined plane: The rupture actuator slides on the guide inclined plane 351. The inclination of the inclined plane converts the tangential motion of the container's rotation into a continuous and directionally stable normal force, which is perpendicular to the inclined plane and points inward toward the sealing cap. Simply put, the rotational motion is converted by the inclined plane into a lateral pushing or lifting force that ruptures the protrusion 350.

[0089] Stress on the protrusion and cap failure: As the rotation angle increases, the lateral force transmitted to the puncture protrusion 350 via the guide ramp 351 continues to increase. The puncture protrusion 350 transmits this force to the entire sealing cap 330 connected to it. When this force exceeds the tensile or tear strength of the cap material, failure begins at the root of the puncture protrusion 350 or at the location of highest stress concentration (such as a pre-designed stress groove). The failure mode may be complete puncture of a regular hole, tearing, or creating a gap.

[0090] Action completion and status locking: When the container 310 rotates to the locked breaking position, the quick-release connection (such as the L-shaped slot and the locking block) reaches the mechanical dead point or the engagement position to achieve locking. At the same time, the interaction between the breaking actuator and the guide slope 351 also reaches the end of the stroke, and the sealing cap 330 is fully opened. The breaking action and the mechanical locking action are completed synchronously.

[0091] The upper end face 120 of the housing is fixedly mounted on the top of the upper component.

[0092] The upper surface of the shell is typically made of engineering plastics (such as POM) or metals (such as aluminum alloy) through precision machining, providing sufficient structural strength and dimensional stability. Its upper part is designed as a receiving surface that perfectly matches the bottom shape of the disposable hopper 300, and the outer periphery of this surface can be pressed against a sealing ring to achieve an end-face seal.

[0093] The rupture actuator 122 is fixed to the upper surface of the housing and protrudes upward. The rupture actuator is a robust, upward-protruding component (towards the hopper). It is rigidly fixed to the upper surface of the housing, and its position is precisely calculated to be tangential to the rotation path of the hopper. Its fixing point must be able to withstand the reaction force upon rupture without displacement or deformation.

[0094] When the disposable hopper 300 is installed on the upper surface of the housing and rotates relative to it, the rupture actuator can interact with the sealing cap 330 of the disposable hopper 300 and rupture it.

[0095] The upper component has a mating part at its center on its upper end face. The mating part is a protrusion or sleeve structure located at the geometric center. It serves as a centering point: the outer diameter of the mating part forms a tight or transitional fit with the through hole in the center of the disposable hopper. When the hopper is pressed down, the through hole fits into the mating part, thereby ensuring that the axes of the two are precisely aligned. This is a prerequisite for all subsequent rotation and unsealing actions to be carried out accurately.

[0096] The mating part is provided with a second locking block 123 circumferentially. The second locking block 123 is a radial protrusion disposed on the outer wall of the mating part circumferentially, and its number and position strictly correspond to the L-shaped slots on the disposable hopper (for example, two symmetrically distributed second locking blocks). Its shape is designed to smoothly enter the L-shaped slot inlet section of the hopper. During rotation, the second locking block slides along the locking section of the L-shaped slot, generating a locking force through mechanical interference. Preferably, the upper surface of the second locking block can be provided with a groove to form a "click" positioning engagement with the positioning protrusion on the hopper, clearly indicating that the installation is in place.

[0097] The upper component is also provided with a feed trough 121 on its upper surface. The feed trough is a groove or channel formed on the platform. It is located adjacent to one side of the rupture actuator and directly below the opening of the material chamber after the hopper rotates. Its cross-sectional shape can be arc-shaped, rectangular, etc., designed to provide sufficient material flow area.

[0098] Once the sealing cap is ruptured, the combustible metal powder inside the material chamber, under the influence of gravity or subsequent vibration, falls directly into the feed chute through the opened opening, and then flows into the funnel inside the upper component. The feed chute ensures a concentrated and smooth powder transport path, preventing powder accumulation or spillage at the interface.

[0099] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A sparkler, characterized in that: It includes: case; A guide tube (400) is disposed inside the housing along the axial direction therein, and at least one first opening (410) is provided circumferentially at its bottom. A hopper (600) for storing combustible metal powder is rotatably sleeved on the outer periphery of the guide tube (400), and the part of the hopper (600) that contacts the guide tube (400) is provided with at least one second opening (620). The hopper (600) has a first position in which the second opening (620) is misaligned with the first opening (410) and a second position in which at least a portion of the second opening (620) is in relative communication with the first opening (410). A fuel tank (900) is provided with an exhaust valve (910), and the exhaust valve (910) is connected to the guide pipe (400); An ignition assembly (800), located inside the housing, is used to ignite the combustible gas output from the guide tube (400); An operating component (500) is disposed on the surface of the housing and is configured to sequentially open the exhaust valve (910) and trigger the ignition component (400) when subjected to force. The first linkage component (700) is located inside the housing and is linked to the operating component (500) to drive the hopper (600) to rotate from the first position to the second position when the operating component (500) is subjected to force.

2. A sparkler according to claim 1, characterized in that: A reset member (610) is provided between the hopper (600) and the housing to drive it to rotate from the second position back to the first position.

3. A firework stick according to claim 1 or 2, characterized in that: The bottom of the hopper (600) extends downward to form a drive rod (620). The first linkage component (700) has a first force-receiving part (720) and a first drive part (710). The first force-receiving part (720) is in contact with the operating component (500), and the first drive part (710) is linked with the drive rod (620).

4. A firework stick according to claim 3, characterized in that: The first linkage component (700) is rotatably disposed within the housing.

5. A firework stick according to claim 3, characterized in that: The operating component (500) includes: A button (510) has one end hinged to the housing and partially protrudes from the housing to form an operating position; The second linkage component (520) is rotatably disposed within the housing. It has a second force-receiving part (523), a second driving part (521) and a third driving part (522). The second force-receiving part (523) is disposed when in contact with the button (510). The second driving part (521) is attached to the trigger end of the ignition component (800). The third driving part (522) is linked to the first force-receiving part (720).

6. A sparkler according to claim 5, characterized in that: A linkage rod (730) is provided between the third driving part (522) and the first force receiving part (720).

7. A sparkler according to claim 1, characterized in that: The housing includes a separable upper component (100) and a lower component (200). The upper component (100) has a first end face (110) at its end, and the first end face (110) has a first fluid channel (111) and a first electrical connection part (113) communicating with the guide tube (400). The lower component (200) has a second end face (210) opposite to the first end face (110) at its end. The second end face (210) has a second fluid channel (211) connected to the gas outlet valve (910) and a second electrical connection part (213) electrically connected to the ignition component (800). When the upper component (100) is connected to the lower component (200), the first end face (110) and the second end face (210) are aligned, so that the first fluid channel (111) and the second fluid channel (211) are aligned and form a sealed connection, and the first electrical connection part (113) and the second electrical connection part (213) are in contact to form an electrical connection. The inlet end of the first fluid channel (111) is connected to a detachable pagoda (112), and the pagoda (112) is sealed and connected to the outlet end of the second fluid channel (211).

8. A sparkler according to claim 1, characterized in that: The upper end of the shell is also provided with a detachable disposable hopper (300), which is sleeved on the outside of the guide pipe (400). The upper end face of the shell is provided with a feeding groove (121), which is connected to the hopper opening (320) of the disposable hopper (300) and is located above the hopper (600).

9. A sparkler according to claim 8, characterized in that: The disposable hopper (300) includes: The container (310) has a material storage chamber inside, the material storage chamber having at least one material storage opening (320). A quick-release connector is provided on the container (310) for quick connection and disassembly with the shell; A sealing cap (330) is connected to the material cavity opening (320) in a breakable manner; When the container (310) is installed onto the housing via the quick-release connector, the housing can apply force to the sealing cap (330) to cause it to break, thereby opening the material chamber opening (320).

10. A sparkler according to claim 9, characterized in that: The upper end of the housing is also provided with a rupture actuator (122). When the disposable hopper (300) is installed on the upper end of the housing and rotates relative to it, the rupture actuator (122) can interact with the sealing cap (330) of the disposable hopper (300) and rupture it.

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