Electronic fuse and firework

Abstract

The utility model relates to the technical field of fuses, and provides an electronic fuze and fireworks, the electronic fuze comprises a shell, a microprocessor, a trigger unit and an ignition head, the microprocessor, the trigger unit and the ignition head are arranged in the shell, the trigger unit is connected with the microprocessor and used for transmitting trigger information to the microprocessor to unlock the microprocessor, and the ignition head is connected with the microprocessor. The microprocessor is connected with the ignition head and used for controlling the ignition head to ignite. After the electronic fuse is installed on the firework, the trigger unit transmits a trigger signal to the microprocessor to unlock the microprocessor in the firework setting-off process, the microprocessor is used for controlling the ignition head to ignite, and compared with a combustion type fuse, the control precision is high, and the high-precision setting-off requirement in the combined setting-off process is met.

Description

Technical Field

[0001] The present application relates to the technical field of fireworks fuses, and in particular to an electronic fuse and fireworks. Background Art

[0002] At present, the fireworks market is flourishing, and the fireworks performances are rich and colorful. The demand for combined fireworks is growing. Currently, the existing fireworks on the market are ignited in the air through incendiary fuses. Due to the large errors in the manufacturing process of incendiary fuses and the production and assembly process of fireworks, there are large individual differences in the height and timing of fireworks in the air, and the combination of fireworks cannot meet the high-precision firing requirements. Utility Model Content

[0003] In view of this, the embodiments of the present application provide an electronic fuse and fireworks to solve the problem that the combination ignition cannot meet the high-precision ignition requirements.

[0004] An embodiment of the first aspect of the present application proposes an electronic fuse, comprising a shell, a microprocessor, a trigger unit and an ignition head, wherein the microprocessor, the trigger unit and the ignition head are arranged in the shell, the trigger unit is connected to the microprocessor and is used to transmit a trigger signal to the microprocessor to unlock the microprocessor, and the microprocessor is connected to the ignition head and is used to control the ignition of the ignition head.

[0005] The beneficial effect of the electronic fuse provided in the embodiment of the present application is that after the electronic fuse is installed on the fireworks shell, a trigger signal is transmitted to the microprocessor through the trigger unit during the fireworks firing process to unlock the microprocessor, and the microprocessor is used to control the ignition head to ignite. Compared with the combustion fuse, the control accuracy is higher, which meets the high-precision firing requirements during combined firing.

[0006] In some embodiments, the trigger unit includes a first sensor for transmitting a trigger signal to the microprocessor when the firework launcher launches fireworks.

[0007] In some embodiments, the first sensor is an acceleration sensor, a temperature sensor, a speed sensor, a pressure sensor or an air pressure sensor; the microprocessor has a timing function, or the electronic fuse includes a timer connected to the microprocessor.

[0008] In some embodiments, the trigger unit includes a second sensor for transmitting a trigger signal to the microprocessor when placed in a firework launch tube.

[0009] In some embodiments, the second sensor is a Hall sensor, a magnetoresistive sensor, or a photoelectric receiver.

[0010] In some embodiments, the trigger unit includes a signal switch for transmitting a trigger signal to the microprocessor before the fireworks are placed into the fireworks launching tube.

[0011] In some embodiments, the signal switch is provided with a button, a dial or a knob, and the housing is provided with a window for exposing the button, the dial or the knob.

[0012] In some embodiments, the trigger unit includes at least two of a first sensor, a second sensor, and a signal switch;

[0013] The first sensor is an acceleration sensor, a velocity sensor, a temperature sensor, a pressure sensor or an air pressure sensor;

[0014] The second sensor is a Hall sensor, a magnetoresistive sensor or a photoelectric receiver;

[0015] The signal switch is provided with a button, a dial or a knob.

[0016] In some embodiments, the electronic fuse further includes an energy storage device, and the shell is provided with a plurality of charging contacts connected to the energy storage device.

[0017] In some embodiments, the energy storage device includes a first energy storage device for supplying power to the ignition head, and a second energy storage device for supplying power to the microprocessor and the trigger unit.

[0018] A second aspect of the present application provides a firework, comprising a firework shell and the electronic fuse as described in the first aspect, wherein the electronic fuse is installed on the firework shell.

[0019] The firework adopts all the embodiments of the electronic fuse described above, and thus has all the beneficial effects of the above embodiments, which will not be described one by one here.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1is a schematic structural diagram of an electronic fuse provided by some embodiments of the present application from a first perspective;

[0023] Figure 2 is a schematic structural diagram of an electronic fuse provided by some embodiments of the present application from a second perspective;

[0024] Figure 3 yes Figure 2 The schematic diagram of the structure of the electronic fuse after the shell is removed is shown;

[0025] Figure 4 yes Figure 2 A schematic diagram of the structure of the middle shell;

[0026] Figure 5 is a control block diagram of an electronic fuze provided in some embodiments of the present application;

[0027] Figure 6 is a schematic diagram of the structure of fireworks provided by some embodiments of the present application;

[0028] Figure 7 yes Figure 6 Schematic diagram of the structure of the Chinese fireworks shell.

[0029] The meanings of the marks in the figure are:

[0030] 100. Fireworks;

[0031] 10. Electronic fuze;

[0032] 11. housing; 111. window; 112. opening; 113. first position-limiting portion; 114. first clamping portion; 115. second clamping portion;

[0033] 12. Circuit board; 121. First side; 122. Second side; 123. Ignition head interface; 124. First contact interface; 125. Second contact interface; 126. Common contact interface; 127. Communication interface;

[0034] 13. Microprocessor;

[0035] 14. First sensor;

[0036] 15. Ignition head;

[0037] 16. Second sensor;

[0038] 17. Signal switch; 171. Button;

[0039] 18. Energy storage device; 181. First energy storage device; 182. Second energy storage device;

[0040] 19, charging contact; 191, first contact; 192, second contact; 193, common contact;

[0041] 20. Fireworks;

[0042] 21. A second limiting portion;

[0043] 22. A third clamping portion. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0046] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0047] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0049] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0050] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] The first embodiment of the present application provides an electronic fuse. Figure 2 , Figure 3 and Figure 6 The electronic fuze 10 includes a housing 11, a microprocessor 13, a trigger unit and an ignition head 15. The microprocessor 13, the trigger unit and the ignition head 15 are arranged in the housing 11, the trigger unit is connected to the microprocessor 13 and is used to transmit a trigger signal to the microprocessor 13 to unlock the microprocessor 13, and the microprocessor 13 is connected to the ignition head 15 and is used to control the ignition head 15 to ignite.

[0053] Optionally, the shell 11 can be made of insulating material, such as plastic, which not only can play an insulating role, but also can reduce the weight of the shell 11, thereby reducing the weight of the electronic fuse 10, which is conducive to the launch of the firework 100.

[0054] It can be understood that a circuit board 12 can be set in the shell 11, and the microprocessor 13, the trigger unit and the ignition head 15 are all mounted on the circuit board 12, and the trigger unit is connected to the microprocessor 13, and the microprocessor 13 is connected to the ignition head 15 through the lines on the circuit board 12; or, the microprocessor 13, the trigger unit and the ignition head 15 are all mounted on the inner wall surface of the shell 11, and the trigger unit is connected to the microprocessor 13, and the microprocessor 13 is connected to the ignition head 15 through wires.

[0055] When the circuit board 12 is disposed in the housing 11, it can be understood that the housing 11 can be a closed housing, that is, the circuit board 12 is wrapped by the housing 11, and the housing 11 is provided with a through hole for the ignition head 15 to extend out of the housing 11; or, the housing 11 can also be a semi-closed housing, so that one side of the circuit board 12 is exposed, and the ignition head 15 is disposed on the exposed side of the circuit board 12. The shape of the housing 11 is not limited, as long as the installation of the circuit board 12 is satisfied.

[0056] The shape of the circuit board 12 can be determined according to the inner cavity of the housing 11. For example, the inner cavity of the housing 11 can be circular, and correspondingly, the shape of the circuit board 12 can be circular; the inner cavity of the housing 11 can be polygonal, such as rectangular, and correspondingly, the shape of the circuit board 12 can be polygonal; the inner cavity of the housing 11 can be elliptical, and correspondingly, the shape of the circuit board 12 can be elliptical. Of course, the inner cavity of the housing 11 can also be irregular, and correspondingly, the shape of the circuit board 12 is irregular. Among them, the circuit board 12 can be a hard circuit board to facilitate the installation of devices such as the microprocessor 13, the trigger unit and the ignition head 15.

[0057] The microprocessor 13 (Microcontroller Unit, MCU), also known as a single-chip microcomputer, is an integrated circuit chip that integrates a processor, a memory, an input and output interface, a clock circuit, etc., and has control, calculation and communication capabilities.

[0058] Optionally, the microprocessor 13 is of model STM32L031G6U6, which has low power consumption, and thus can reduce the power supply capacity of the energy storage device 18 or the power supply, which is beneficial to the miniaturization of the energy storage device 18 or the power supply, thereby reducing the weight of the electronic fuse 10.

[0059] The trigger unit is a device that can transmit a trigger signal to the microprocessor 13 after being triggered to unlock the microprocessor 13. It can be understood that only when the trigger unit sends a signal to the microprocessor 13 after being triggered, the microprocessor 13 can control the ignition head 15 to ignite. It should be noted that when there are multiple trigger units, all of them need to send trigger signals so that the microprocessor 13 can control the ignition head 15 to ignite.

[0060] Optionally, the ignition head 15 includes an ignition agent, a heating wire and two wires, the ignition agent wraps the heating wire, the two ends of the heating wire are respectively connected to the two wires, and the two wires are connected to the ignition head interface 123 of the circuit board 12. The microprocessor 13 controls the circuit board 12 to supply power to the two wires, and when the current passes through the heating wire, the heating wire starts to heat up, and when the temperature reaches the ignition point of the ignition agent, the ignition agent starts to burn and ignites the combustion agent of the firework shell 20, so that the fireworks 100 are set off.

[0061] The ignition head 15 may be a disposable ignition head to reduce the cost, and its low ignition voltage characteristic can greatly reduce the scale of the driving circuit.

[0062] The electronic fuse 10 provided in the embodiment of the present application is installed on the firework shell 20 when in use. During the fireworks firing process, a trigger signal is transmitted to the microprocessor 13 through the trigger unit to unlock the microprocessor 13, and the microprocessor 13 is used to control the ignition head 15 to ignite. Compared with the combustion fuse, the control accuracy is higher, which meets the high-precision firing requirements during combined firing.

[0063] In some embodiments, the trigger unit includes a first sensor 14 for transmitting a trigger signal to the microprocessor 13 when the firework 100 is launched from the firework launch tube.

[0064] When the firework 100 is launched from the firework launching tube, it means that the firework 100 has been placed in the firework launching tube and has been manually ignited.

[0065] Optionally, the first sensor 14 may be an acceleration sensor, which is a trigger unit capable of measuring acceleration, and is generally composed of a mass block, a damper, an elastic element, a sensitive element, and an adaptive circuit. During the acceleration process, the acceleration value is obtained by measuring the inertial force exerted on the mass block and using Newton's second law. Depending on the different sensitive elements of the trigger unit, common trigger units include capacitive, inductive, strain, piezoresistive, piezoelectric, and the like.

[0066] Specifically, after the firework 100 is placed in the firework launch tube and ignited manually, under the thrust of the combustion agent after ignition, the upward acceleration of the firework 100 in the firework launch tube is relatively large (can reach dozens of gravitational acceleration g), and at the moment when the firework 100 leaves the firework launch tube, the acceleration becomes the downward gravitational acceleration g. Therefore, the threshold of acceleration can be set to dozens of gravitational acceleration g, at which time, the timing starts from the time when the firework 100 is in the firework launch tube, and after the set ignition delay is reached, the microprocessor 13 controls the ignition head 15 to ignite; of course, the threshold of acceleration can also be set to gravitational acceleration g, at which time, the timing starts from the time when the firework 100 leaves the firework launch tube, and after the set ignition delay is reached, the microprocessor 13 controls the ignition head 15 to ignite.

[0067] The microprocessor 13 has a timing function, or the electronic fuse 10 includes a timer connected to the microprocessor 13 .

[0068] Optionally, the acceleration sensor is a model LIS3DHTR.

[0069] Optionally, the first sensor 14 may also be a speed sensor. Specifically, after the firework 100 is placed in the firework launch tube and ignited manually, the speed of the firework 100 in the firework launch tube is relatively high under the thrust of the combustion agent after ignition, and the speed gradually decreases after the firework 100 leaves the firework launch tube. Therefore, a certain speed before the firework 100 leaves the firework launch tube can be selected as a threshold value. At this time, the timing starts from when the firework 100 is in the firework launch tube, and after the set ignition delay is reached, the microprocessor 13 controls the ignition head 15 to ignite; of course, a certain speed after the firework 100 leaves the firework launch tube can also be selected as a threshold value. At this time, the timing starts from when the firework 100 leaves the firework launch tube, and after the set ignition delay is reached, the microprocessor 13 controls the ignition head 15 to ignite.

[0070] In other embodiments, the first sensor 14 may be a temperature sensor, in which case a certain temperature after the combustion agent is ignited is used as the threshold value; or the first sensor 14 may be a pressure sensor or an air pressure sensor, in which case a certain pressure or a certain pressure after the combustion agent is ignited is used as the threshold value. Figure 3 In some embodiments, the trigger unit includes a second sensor 16 for transmitting a trigger signal to the microprocessor 13 when the firework 100 is placed in the firework launch tube.

[0071] Optionally, the second sensor 16 is a Hall sensor, and the Hall sensor is used to provide magnetic field change information to the microprocessor 13 .

[0072] Optionally, the model of the selected Hall sensor is HX6383EST.

[0073] Specifically, a magnetic part, such as a magnet, is installed in the firework launch tube; after the firework 100 with the integrated electronic fuse 10 is loaded into the firework launch tube, the Hall sensor detects the magnetic field of the magnetic part and outputs a detection signal, which is received by the microprocessor 13. Of course, the firework launch tube may not be installed with a magnetic part, and after the firework 100 is loaded into the firework launch tube, the magnetic part is brought close to the firework launch tube so that the Hall sensor detects the magnetic field and outputs a signal.

[0074] Optionally, the second sensor 16 may also be a magnetoresistive sensor, which is mainly composed of a magnetic sensitive element, a signal processing circuit and an output circuit. The basic principle is that when a magnetic field is applied to the magnetic sensitive element, the magnetic field will cause a change in the internal resistance of the magnetic sensitive element, which in turn causes a change in the signal voltage, that is, the magnetoresistive sensor will convert the change in resistance value into a corresponding electrical signal and output it through the output circuit. At this time, it is also necessary to install a magnetic part in the firework launch tube, or after the firework 100 is loaded into the firework launch tube, bring the magnetic part close to the firework launch tube.

[0075] Optionally, the second sensor 16 may also be a photoelectric receiver. A photoelectric transmitter is provided in the firework launch tube. After the firework 100 is loaded into the firework launch tube, the photoelectric receiver receives the signal emitted by the photoelectric transmitter and transmits the signal to the microprocessor 13.

[0076] Only after the second sensor 16 transmits the trigger signal to the microprocessor 13, the microprocessor 13 will control the ignition head 15 to perform the ignition action after receiving the trigger signal transmitted by the first sensor 14, thereby avoiding the problem of the ignition head 15 igniting by mistake due to the acceleration value or speed value generated by the shaking of the fireworks 100 during transportation being collected by the acceleration sensor or speed sensor, thereby ensuring the safety of the fireworks 100.

[0077] It should be noted that the firework launching tube and the firework 100 are not usually placed together, and the firework 100 will only be placed in the firework launching tube when the firework 100 needs to be set off.

[0078] Please also refer to Figure 3 and Figure 4 In some embodiments, the trigger unit includes a signal switch 17 for transmitting a trigger signal to the microprocessor 13 before the firework 100 is placed into the firework launch tube.

[0079] Optionally, a button 171 is provided on the signal switch 17 , and a window 111 for exposing the button 171 is provided on the housing 11 .

[0080] Optionally, the signal switch 17 is a self-locking switch, for example, the signal switch 17 is a self-locking horizontal push button switch, model XKB5858-ZE-75; after pressing the button 171 of the signal switch 17, the switch is self-locked, and the signal will be detected by the microprocessor 13. If the button 171 is not pressed before the fireworks 100 are loaded into the fireworks launch tube, even if the second sensor 16 detects the magnetic field and outputs a detection signal, and the first sensor 14 detects the acceleration value, speed value, temperature value, pressure value or air pressure value, the ignition head 15 will not perform the ignition action, thereby further ensuring the safety of the fireworks 100.

[0081] It should be noted that the fireworks 100 need to be set off correctly according to the operating specifications, that is, make sure to press the button 171 of the signal switch 17 first, and then put the fireworks 100 into the fireworks launch tube equipped with a magnetic part to ensure that the fireworks 100 can be set off normally.

[0082] It can be understood that the button 171 can be higher than the outer wall surface of the shell 11; alternatively, the button 171 can be flush with the outer wall surface of the shell 11; alternatively, the button 171 can be lower than the outer wall surface of the shell 11.

[0083] In other embodiments, a dial button may be provided on the signal switch 17, and a trigger signal may be transmitted to the microprocessor 13 by turning the dial button; or, a knob may be provided on the signal switch 17, and a trigger signal may be transmitted to the microprocessor 13 by turning the knob.

[0084] In some embodiments, the trigger unit includes at least two of the first sensor 14 , the second sensor 16 , and the signal switch 17 .

[0085] It can be understood that the trigger unit includes the first sensor 14 and the second sensor 16; or, the trigger unit includes the first sensor 14 and the signal switch 17; or, the trigger unit includes the second sensor 16 and the signal switch 17; or, the trigger unit includes the first sensor 14, the second sensor 16 and the signal switch 17.

[0086] Among them, the first sensor 14 can be an acceleration sensor, a speed sensor, a temperature sensor, a pressure sensor or an air pressure sensor; the second sensor 16 can be a Hall sensor, a magnetoresistive sensor or a photoelectric receiver; the signal switch 17 can be provided with a button 171, a dial or a knob.

[0087] Please also refer to Figure 2 , Figure 3 and Figure 7 In some embodiments, a circuit board 12 is disposed in the housing 11 , and the circuit board 12 has a first side 121 and a second side 122 in its thickness direction. The microprocessor 13 and the trigger unit are located on the first side 121 of the circuit board 12 , and the ignition head 15 is located on the second side 122 of the circuit board 12 .

[0088] The second side surface 122 of the circuit board 12 faces the firework shell 20 , so that the ignition head 15 is closer to the combustion agent of the firework shell 20 , which is beneficial for the ignition head 15 to ignite the combustion agent of the firework shell 20 .

[0089] The trigger unit and the microprocessor 13 are located on the first side surface 121 of the circuit board 12, that is, the trigger unit and the microprocessor 13 face away from the firework shell 20. In this way, the trigger unit and the microprocessor 13 can be located in a closed space surrounded by the circuit board 12 and the housing 11, reducing the impact of the external environment on the trigger unit and the microprocessor 13, and ensuring that the firework 100 can be ignited normally.

[0090] In other embodiments, the trigger unit and the microprocessor 13 may also be located on the second side surface 122 of the circuit board 12 , that is, the trigger unit, the microprocessor 13 and the ignition head 15 are located on the same side in the thickness direction of the circuit board 12 .

[0091] Please refer to Figure 3In some embodiments, the electronic fuse 10 further includes an energy storage device 18 disposed on the circuit board 12, and the housing 11 is provided with a plurality of charging contacts 19 connected to the energy storage device 18. The plurality of charging contacts 19 are used to contact with charging probes of an external power source.

[0092] Optionally, the energy storage device 18 may be a capacitor, an inductor, etc. The energy storage device 18 uses the charging contacts 19 to store electrical energy for a short period of time through an external power source to ensure the power requirements of various components on the circuit board 12. Since the weight of the energy storage device 18 is relatively small, the weight of the electronic fuse 10 can be reduced, thereby reducing the overall weight of the firework 100, which is beneficial to the launch of the firework 100. Moreover, compared with the power source, the cost of the energy storage device 18 is relatively low.

[0093] Optionally, the energy storage device 18 is located on the first side 121 of the circuit board 12 , that is, the trigger unit, the microprocessor 13 and the energy storage device 18 are located on the same side of the circuit board 12 .

[0094] In other embodiments, the energy storage device 18 may not be provided, but a power supply may be provided on the circuit board 12. Figure 3 and Figure 5 In some embodiments, the energy storage device 18 includes a first energy storage device 181 for supplying power to the ignition head 15 , and a second energy storage device 182 for supplying power to the microprocessor 13 and the trigger unit.

[0095] Since the first energy storage device 181 only supplies power to the ignition head 15, the power supply requirement can be met by providing one first energy storage device 181. Of course, two or more first energy storage devices 181 can also be provided while meeting the power supply requirement.

[0096] Since the second energy storage device 182 not only supplies power to the microprocessor 13 but also supplies power to the trigger unit, two second energy storage devices 182 are provided to meet the power supply requirements. Of course, one or more than three first energy storage devices 181 may also be provided while meeting the power supply requirements.

[0097] By adopting the above technical solution, the ignition and logic control are powered independently to avoid mutual influence.

[0098] In other embodiments, one energy storage device 18 may be provided, which not only supplies power to the ignition head 15 but also supplies power to the microprocessor 13 and the trigger unit.

[0099] Please also refer to Figure 1 and Figure 3In some embodiments, the plurality of charging contacts 19 include a first contact 191 , a second contact 192 , and a common contact 193 , the first contact 191 and the common contact 193 are connected to the first energy storage device 181 , and the second contact 192 and the common contact 193 are connected to the second energy storage device 182 .

[0100] Specifically, the circuit board 12 is provided with a first contact interface 124, a second contact interface 125 and a common contact interface 126, the first contact interface 124 is connected to the first contact 191 through a first wire, the second contact interface 125 is connected to the second contact 192 through a second wire, and the common contact interface 126 is connected to the common contact 193 through a common wire. The first contact interface 124 and the common contact interface 126 are connected to the first energy storage device 181 through the internal circuit of the circuit board 12, and the second contact interface 125 and the common contact interface 126 are connected to the second energy storage device 182 through the internal circuit of the circuit board 12.

[0101] Optionally, the first contact 191, the second contact 192 and the common contact 193 are installed on the top of the housing 11 and extend toward the inside of the housing 11. Of course, the first contact 191, the second contact 192 and the common contact 193 can also be located at the side of the housing 11 and extend toward the inside of the housing 11.

[0102] By providing the common contact 193 , the first contact 191 and the second contact 192 share the common contact 193 , thus reducing the number of charging contacts 19 , simplifying the structure of the electronic fuse 10 , and reducing the manufacturing cost of the electronic fuse 10 .

[0103] In other embodiments, the common contact 193 and the common contact interface 126 may not be provided, but the third contact and the fourth contact may be additionally provided on the housing 11, and the third contact interface and the fourth contact interface may be additionally provided on the circuit board 12, the first contact interface 124 is connected to the first contact 191 through the first wire, the second contact interface 125 is connected to the second contact 192 through the second wire, the third contact interface is connected to the third contact through the third wire, and the fourth contact interface is connected to the fourth contact through the fourth wire. The first contact interface 124 and the third contact interface are connected to the first energy storage device 181 through the internal circuit of the circuit board 12, and the second contact interface 125 and the fourth contact interface are connected to the second energy storage device 182 through the internal circuit of the circuit board 12.

[0104] In other embodiments, one energy storage device 18 is provided, in which case two contacts are provided on the housing 11, and two contact interfaces are provided on the circuit board 12, the two contacts are respectively connected to the two contact interfaces through wires, and the two contact interfaces are connected to the energy storage device 18 through the internal circuits of the circuit board 12.

[0105] Please refer to Figure 3 In some embodiments, the circuit board 12 is further provided with a communication interface 127 connected to the microprocessor 13 , and the communication interface 127 is used to input an ignition delay signal to the microprocessor 13 .

[0106] Specifically, the microprocessor 13 is a programmable MCU, and the communication interface 127 can be connected to a signal line, and the signal line is connected to a computer. The ignition delay of the microprocessor 13 is adjusted by the computer. The ignition delay can be designed to be 5s, 10s, 15s or 20s according to the firing height of the fireworks 100 to meet the firing of the fireworks 100 at different heights in the air.

[0107] In other embodiments, the microprocessor 13 may also be a non-programmable MCU, that is, the ignition delay of the microprocessor 13 is a fixed time, that is, the firing height of the firework 100 integrated with the electronic fuse 10 is a fixed height.

[0108] Please refer to Figure 2 and Figure 4 In some embodiments, the housing 11 is provided with an opening 112 , and the circuit board 12 blocks the opening 112 and exposes the second side surface 122 .

[0109] Since the ignition head 15 is disposed on the second side surface 122 of the circuit board 12 , the circuit board 12 exposes the second side surface 122 , which facilitates the ignition head 15 to be close to the combustion agent of the firework shell 20 , thereby facilitating the ignition of the firework 100 .

[0110] The circuit board 12 blocks the opening 112, which can be understood as the circuit board 12 being installed in the housing 11 through the opening 112. Optionally, a first limiting portion 113 and a first clamping portion 114 are provided at the opening 112 of the housing 11, and the first limiting portion 113 and the first clamping portion 114 are arranged at intervals along the axial direction of the housing 11, and the interval between the first limiting portion 113 and the first clamping portion 114 is greater than or equal to the thickness of the circuit board 12, so that the circuit board 12 is clamped therebetween. The axial direction of the housing 11 is the thickness direction of the circuit board 12.

[0111] Optionally, the first limiting portion 113 may be an annular convex portion, a C-shaped convex portion, etc.; a plurality of first clamping portions 114 may be arranged at intervals along the circumference of the housing 11 .

[0112] Of course, the first clamping portion 114 may not be provided, and the circuit board 12 may be fixed on the first limiting portion 113 by a plastic fastener.

[0113] Please also refer to Figure 6 and Figure 7 The second aspect of the present application provides a firework 100. The firework 100 includes a firework shell 20 and the electronic fuse 10 as described in the first aspect, and the electronic fuse 10 is installed on the firework shell 20.

[0114] Optionally, the bottom of the electronic fuse 10 is docked with the top of the firework shell 20, and the ignition head 15 is very close to the combustion agent of the firework shell 20. After the ignition head 15 is ignited, the combustion agent of the firework shell 20 can be ignited.

[0115] Specifically, a second limiting portion 21 and a third clamping portion 22 are provided on the inner side of one end of the firework shell 20, and the second limiting portion 21 and the third clamping portion 22 are arranged at intervals along the axial direction of the firework shell 20; a second clamping portion 115 is provided on the outer wall surface of the shell 11 of the electronic fuze 10, wherein the spacing distance between the second limiting portion 21 and the third clamping portion 22 is greater than or equal to the thickness of the second clamping portion 115 in the axial direction of the firework shell 20.

[0116] Optionally, the second limiting portion 21 may be an annular protrusion, a C-shaped protrusion, etc.; a plurality of the second clamping portion 115 and the third clamping portion 22 may be arranged at intervals along the circumference of the housing 11 .

[0117] When the electronic fuse 10 is installed on the fireworks shell 20, the second clamping portion 115 and the third clamping portion 22 are first arranged in a staggered manner. When the second clamping portion 115 passes over the third clamping portion 22, the electronic fuse 10 is rotated so that the second clamping portion 115 is clamped on the second limiting portion 21 and the third clamping portion 22, and the installation of the electronic fuse 10 is completed.

[0118] It should be noted that after the electronic fuse 10 is installed on the fireworks shell 20 , it should not affect the triggering of the signal switch 17 .

[0119] The firework 100 adopts any one or more embodiments of the electronic fuse 10 described above, and thus has all the beneficial effects of the above embodiments, which will not be described in detail here.

[0120] Please refer to Figure 2 , Figure 3 , Figure 5 and Figure 6 The specific firing process of the fireworks 100 provided in this application is as follows:

[0121] Before the firework 100 is set off, the charging probe of the external power source is first brought into contact with the charging contact 19 to charge the first energy storage device 181 and the second energy storage device 182 respectively. The energy stored in the two is sufficient for the electronic fuse 10 to work. This step is the first step to unlock the electronic fuse 10.

[0122] After charging is completed, the button 171 of the signal switch 17 of the electronic fuse 10 is pressed to self-lock the switch. This signal will be detected by the microprocessor 13. This step is the second step of unlocking the electronic fuse 10.

[0123] Then, the firework 100 is placed in a firework launch tube equipped with a magnetic part. At this time, the Hall sensor detects the magnetic field and outputs a detection signal, which is detected by the microprocessor 13 . This step is the third step of unlocking the electronic fuse 10 .

[0124] The fireworks 100 loaded into the fireworks launch tube will generate acceleration for a certain period of time when they are launched into the air. The acceleration sensor of the electronic fuse 10 can detect the acceleration changes of the fireworks 100 during the launch process. At the same time, the microprocessor 13 of the electronic fuse 10 will receive the acceleration information provided by the acceleration sensor; when the acceleration value reaches the set threshold, the microprocessor 13 starts to start the precise timing. When the timing reaches the configured ignition delay, the microprocessor 13 controls the ignition head 15 to perform the ignition action, and then detonates the fireworks shell 20, so as to meet the high-precision firing requirements during the combined firing.

[0125] As can be seen from the above, the electronic fuze 10 itself has no power supply. When in use, it obtains short-term energy storage through external charging. The microprocessor 13 performs accurate delayed ignition timing only when the three sensing devices, namely the signal switch 17, the second sensor 16, and the first sensor 14, have reached the start-up state. After the timing time reaches the configured time, the ignition head 15 is controlled to perform the ignition action. The high precision and consistency of the product are achieved through the precise timing of the microprocessor 13, and the flexibility of the product is achieved by setting the ignition delay through the communication interface 127. The electronic fuze 10 has good safety through its own power-free and triple sensing design. The electronic fuze 10 can be widely used in scenes such as fireworks manufacturing, fireworks assembly, and fireworks setting.

[0126] Among them, the hardware initial state of the detection signal designed by the circuit board 12 is that the sensor is invalid, the hardware initial state of the control signal is that ignition is not performed, and the signal is filtered by hardware de-jittering; the energy storage time of the hardware circuit can be adjusted by replacing the energy storage device 18; the software is strictly designed to detect the signal state at high speed and perform filtering, and the software logic allows resetting other sensors through the signal switch 17. Multiple measures are taken to ensure the safety of the electronic fuse 10.

[0127] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An electronic fuse (10), characterized in that: The invention comprises a housing (11), a microprocessor (13), a trigger unit and an ignition head (15); the microprocessor (13), the trigger unit and the ignition head (15) are all arranged in the housing (11); the trigger unit is connected to the microprocessor (13) and is used to transmit a trigger signal to the microprocessor (13) to unlock the microprocessor (13); the microprocessor (13) is connected to the ignition head (15) and is used to control the ignition of the ignition head (15).

2. The electronic fuse (10) according to claim 1, characterized in that: The trigger unit comprises a first sensor (14) for transmitting a trigger signal to the microprocessor (13) when the firework launching tube launches fireworks (100).

3. The electronic fuse (10) according to claim 2, characterized in that: The first sensor (14) is an acceleration sensor, a speed sensor, a temperature sensor, a pressure sensor or an air pressure sensor; the microprocessor (13) has a timing function, or the electronic fuse (10) includes a timer connected to the microprocessor (13).

4. The electronic fuse (10) according to claim 1, characterized in that: The trigger unit comprises a second sensor (16) for transmitting a trigger signal to the microprocessor (13) when a firework (100) is placed in a firework launching tube.

5. The electronic fuse (10) according to claim 4, characterized in that: The second sensor (16) is a Hall sensor, a magnetoresistive sensor or a photoelectric receiver.

6. The electronic fuse (10) according to claim 1, characterized in that: The trigger unit comprises a signal switch (17) for transmitting a trigger signal to the microprocessor (13) before the firework (100) is placed in the firework launch tube.

7. The electronic fuse (10) according to claim 6, characterized in that: The signal switch (17) is provided with a button (171), a dial or a knob, and the housing (11) is provided with a window (111) for exposing the button (171), the dial or the knob.

8. The electronic fuse (10) according to claim 1, characterized in that: The trigger unit comprises at least two of a first sensor (14), a second sensor (16) and a signal switch (17); The first sensor (14) is an acceleration sensor, a velocity sensor, a temperature sensor, a pressure sensor or an air pressure sensor; The second sensor (16) is a Hall sensor, a magnetoresistive sensor or a photoelectric receiver; The signal switch (17) is provided with a button (171), a dial or a knob.

9. The electronic fuse (10) according to any one of claims 1 to 8, characterized in that: The electronic fuse (10) further comprises an energy storage device (18), and the housing (11) is provided with a plurality of charging contacts (19) connected to the energy storage device (18).

10. The electronic fuse (10) according to claim 9, characterized in that: The energy storage device (18) comprises a first energy storage device (181) for supplying power to the ignition head (15), and a second energy storage device (182) for supplying power to the microprocessor (13) and the trigger unit.

11. A firework (100), characterized in that: It comprises a fireworks shell (20) and an electronic fuse (10) according to any one of claims 1 to 10, wherein the electronic fuse (10) is mounted on the fireworks shell (20).

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