Piezoelectric ignition assembly, piezoelectric igniter and ignition device
By connecting the piezoelectric ceramic through an insert-type conductive contact, the steel cap is eliminated, solving the problems of high cost and high precision requirements in existing piezoelectric igniters, thus achieving cost reduction and improved production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN DONGYI ELECTRIC CO LTD
- Filing Date
- 2026-03-19
- Publication Date
- 2026-04-24
AI Technical Summary
The steel cap connection method in existing piezoelectric igniters is costly and requires high precision of components, resulting in a high defect rate and making further optimization difficult.
The piezoelectric ceramic is connected by a conductive contact component through an insertion contact method, eliminating the need for a steel cap, simplifying the component structure, and reducing material costs and assembly precision requirements.
This reduces the amount and cost of piezoelectric ceramic materials used, improves product qualification rate, simplifies production process, and reduces defect rate.
Smart Images
Figure CN224162627U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a piezoelectric ignition component, a piezoelectric igniter, and an ignition device. Background Technology
[0002] A piezoelectric igniter is a device that uses the positive piezoelectric effect of piezoelectric ceramics to convert mechanical energy into a high-voltage electric spark, thereby igniting combustible gases. It is widely used in household gas stoves, lighters, and other products. Its basic working principle is: a mechanical impact device applies instantaneous pressure to the piezoelectric ceramic, generating a high-voltage pulse at its two ends. This high voltage forms an electric spark at the gap between the discharge electrodes, thereby igniting the gas.
[0003] In the prior art, a common high-voltage output structure for piezoelectric igniters typically includes: a piezoelectric ceramic column, an insulating housing, and a separate metal component (usually referred to as a "steel cap"). The piezoelectric ceramic column is housed within a mounting hole in the housing, and one end of it is electrically connected and mechanically fixed via the steel cap. Specifically, the steel cap is fixed to the housing by means of threaded connections or other methods, and its inner bottom surface makes contact with the end face of the ceramic column to conduct current.
[0004] While the widely used steel cap connection method is mature, some issues still exist in further controlling costs and improving production adaptability:
[0005] First, the cost is high. As a metal part that needs to be processed and assembled separately, the manufacturing cost of the steel cap itself constitutes part of the total product cost. Currently, there is room for cost optimization. At the same time, in order to meet the contact area required for reliable connection and conductivity of the steel cap, the axial dimension of the corresponding end of the piezoelectric ceramic column usually needs to reserve a specific length, which to some extent increases the amount of piezoelectric ceramic material used and increases the cost of ceramics.
[0006] Secondly, the precision requirements for components and assembly are relatively high. The reliability of this structure depends on the stable contact between the steel cap and the ceramic end face. To ensure good contact, the end face of the piezoelectric ceramic post, after being installed in the housing, must maintain a precise flush relationship with the reference end face of the housing mounting hole. If the ceramic end face is recessed too much relative to the reference end face, it may lead to insufficient contact with the steel cap; if it protrudes too much, it may affect the smooth installation or tightening of the steel cap. Therefore, in actual production, strict control over the dimensional tolerances of relevant components and the assembly process is required; otherwise, a high product defect rate may result.
[0007] In conclusion, the existing steel cap piezoelectric igniter structure still has room for improvement and optimization in terms of further cost control and process simplification. Utility Model Content
[0008] A piezoelectric ignition assembly includes: a housing and a conductive contact member connected to the housing, wherein the housing is provided with a mounting cavity, a ceramic core hole, a conductive connector mounting hole, and an adhesive inlet hole;
[0009] Along the first direction, the first end face of the housing is provided with an opening, and the opening communicates with the mounting cavity;
[0010] The ceramic core hole and the conductive connector mounting hole are located away from the first end face along the first direction and are isolated from each other. One end of the ceramic core hole and the conductive connector mounting hole are connected to the mounting cavity.
[0011] Along the second direction, the glue inlet hole is connected to the ceramic core hole;
[0012] A conductive connector is installed in the conductive connector mounting hole. Along the first direction, the impact head, the first ceramic, the conductive sheet, and the second ceramic are sequentially arranged and installed into the ceramic core hole. The conductive sheet is connected to a high-voltage wire.
[0013] The conductive abutment includes an insertion portion and an abutment portion along a first direction. The insertion portion is provided with a first abutment surface. After the conductive abutment is connected to the housing, the insertion portion extends into the ceramic core hole. The first abutment surface abuts against the end face of the second ceramic. The abutment portion is disposed outside the ceramic core hole and abuts against the conductive connector.
[0014] The first direction is the length direction of the shell, and the second direction is the radial direction of the ceramic core hole perpendicular to the first direction.
[0015] Preferably, the abutting part is provided with a second abutting surface, and when the extending part extends into the ceramic core hole along the first direction, the second abutting surface can abut against the lower end surface of the conductive connector along the first direction.
[0016] Preferably, when the second contact surface abuts against the lower end surface of the conductive connector, it can simultaneously abut against the outer end surface of the ceramic core hole.
[0017] Preferably, when the second contact surface abuts against the conductive connector, it can simultaneously abut against the outer end face of the ceramic core hole and the outer end face of the conductive connector mounting hole.
[0018] Preferably, after the conductive abutment is connected to the housing, the conductive abutment covers the entire ceramic core hole and abuts the lower end face of the conductive connector, and at least a portion of the conductive connector is exposed outside the conductive abutment.
[0019] Preferably, at least one of the first abutting surface, the outer end face of the ceramic core hole, and the outer end face of the conductive connector mounting hole is parallel to the second abutting surface.
[0020] Preferably, the extension portion is configured as a cylindrical rod, the first abutting surface is disposed at one end of the extension portion along a first direction, the second ceramic is configured as a cylinder, and the diameter of the end face of the second ceramic is less than or equal to the diameter of the first abutting surface.
[0021] Preferably, the ceramic core hole is provided with a first mounting hole and a second mounting hole of different diameters along the first direction, the diameter of the second mounting hole is larger than that of the first mounting hole, a part of the impact head, the entire first ceramic, a part of the conductive sheet, and a part of the second ceramic are disposed in the first mounting hole, and the connection structure between the extension part and the second mounting hole is disposed in the second mounting hole.
[0022] Preferably, the inner wall of the ceramic core hole is provided with an internal thread, the extension part is provided with a cylindrical rod, and the outer circumferential surface of the extension part is provided with an external thread that forms a threaded engagement with the internal thread.
[0023] Preferably, the inserted part is connected and fixed to the ceramic core hole by a threaded connection or a snap-fit method.
[0024] Preferably, the conductive contact is a metal screw, the screw shaft of the metal screw is an insertion part, the head of the metal screw is an contact part, and the end face of the screw shaft along the first direction is a plane.
[0025] Preferably, the mounting cavity is provided with a first mounting surface away from the opening along a first direction, one end of the conductive connector mounting hole is disposed on the first mounting surface, and the other end extends away from the first end face of the housing along the first direction to the second end face of the housing opposite to the first end face, one end of the ceramic core hole protrudes from the first mounting surface toward the first end face of the housing along the first direction, and the other end extends away from the first end face of the housing along the first direction to the second end face of the housing opposite to the first end face, and the axis of the conductive connector mounting hole is parallel to the axis of the ceramic core hole.
[0026] Preferably, the surface of the housing is provided with a dispensing groove, the dispensing hole is provided on the bottom surface of the dispensing groove, and the dispensing hole divides the bottom surface of the dispensing groove into a first dispensing bottom surface and a second dispensing bottom surface that are spaced apart from each other along a first direction.
[0027] Preferably, the housing includes a first housing and a second housing along the first direction, the mounting cavity and the glue inlet hole are disposed in the first housing, and the ceramic core hole and the conductive connector mounting hole are disposed in both the first housing and the second housing.
[0028] Preferably, the ceramic core hole on the second housing is provided with a first arc-shaped shell wall, and the conductive connector mounting hole on the second housing is provided with a second arc-shaped shell wall, with the second arc-shaped shell wall disposed on the first arc-shaped shell wall.
[0029] Preferably, the cross-section of the second housing comprises two circles, wherein the first circle moves along the second direction and overlaps with at least a portion of the second circle.
[0030] Preferably, the conductive connector is a pin or a dowel.
[0031] This utility model also provides a piezoelectric igniter, including the piezoelectric ignition assembly, a firing unit that can be installed into the mounting cavity, and an elastic return member. The firing unit includes a hammer, and one end of the elastic return member is connected to the hammer along a first direction, while the other end is disposed in the mounting cavity and in contact with the conductive connector.
[0032] This utility model also provides an ignition device, including a fuel unit and the piezoelectric igniter, wherein the piezoelectric igniter is configured to ignite the fuel in the fuel unit.
[0033] This utility model piezoelectric ignition assembly has a simple structure, which can eliminate the original high-cost steel cap and shorten the length of the piezoelectric ceramic, thus significantly reducing the cost of the ceramic and resulting in a lower overall cost. Furthermore, the extended contact method has lower requirements for the manufacturing or assembly precision of the components compared to the original flat contact method of the ceramic, which is more conducive to improving the product qualification rate. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0035] Figure 1 This is a schematic diagram of the piezoelectric igniter of this utility model;
[0036] Figure 2 This is an exploded view of the piezoelectric igniter of this utility model;
[0037] Figure 3 This is a first-view schematic diagram of the piezoelectric igniter housing of this utility model;
[0038] Figure 4 This is a second-view schematic diagram of the piezoelectric igniter housing of this utility model;
[0039] Figure 5 This is a third-view schematic diagram of the piezoelectric igniter housing of this utility model;
[0040] Figure 6 This is a fourth-view schematic diagram of the piezoelectric igniter housing of this utility model;
[0041] Figure 7 This is a top view of the housing of the piezoelectric igniter of this utility model;
[0042] Figure 8 for Figure 7 Sectional view of AA;
[0043] Figure 9 for Figure 7 BB section view;
[0044] Figure 10 This is a front view of the housing of the piezoelectric igniter of this utility model;
[0045] Figure 11 for Figure 10 CC section view;
[0046] Figure 12 for Figure 10 DD section view;
[0047] Figure 13 This is a schematic diagram of the conductive connector structure in the piezoelectric igniter of this utility model;
[0048] Figure 14 This is a schematic diagram of the conductive sheet structure in the piezoelectric igniter of this utility model;
[0049] Figure 15 This is another structural schematic diagram of the conductive sheet in the piezoelectric igniter of this utility model;
[0050] Figure 16 This is a schematic diagram of the impact head structure in the piezoelectric igniter of this utility model;
[0051] Figure 17 This is a schematic diagram of the piezoelectric ceramic structure in the piezoelectric igniter of this utility model;
[0052] Figure 18 This is a schematic diagram of the conductive contact component in the piezoelectric igniter of this utility model;
[0053] Figure 19 This is a schematic diagram of the conductive contact component in the piezoelectric igniter of this utility model;
[0054] Figure 20 This is a schematic diagram of the conductive contact component in the piezoelectric igniter of this utility model.
[0055] Figure 21 This is a schematic diagram showing the installation of some parts of the piezoelectric igniter of this utility model;
[0056] Figure 22 This is a cross-sectional view of the piezoelectric igniter of this utility model;
[0057] Figure 23 for Figure 22 Enlarged schematic diagram of a portion of the S-shape in the middle;
[0058] Figure 24 This is an exploded view of the firing unit in the piezoelectric igniter of this utility model. Detailed Implementation
[0059] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0060] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0062] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0063] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0064] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0065] like Figures 1-2 As shown, the present invention provides a piezoelectric igniter including a piezoelectric ignition assembly 100, a firing unit 200, and an elastic recovery member 300. Both the firing unit 200 and the elastic recovery member 300 can be installed on the piezoelectric ignition assembly 100.
[0066] like Figures 3-12 , Figure 21 As shown, the piezoelectric ignition assembly 100 includes a housing 11 and piezoelectric ceramics 30, conductive connectors 40, conductive abutments 50, impact heads 60, conductive sheets 70, and high-voltage wires 80 that can be installed onto the housing 11. It should be noted that "installed onto the housing 11" in this invention includes both direct installation onto the housing 11 and indirect installation onto other components already installed onto the housing 11.
[0067] like Figures 3-6 , Figures 10-18 As shown, the outer side of the housing 11 is provided with a first side 10a, a second side 10b, a third side 10c, and a fourth side 10d. The housing 11 includes a first end face 10f and a second end face 10e along its length direction X. In another embodiment, the first end face 10f and the second end face 10e can be the two end faces of the housing along the length direction X, such as the upper end face and the lower end face, or the upper top face or the lower top face.
[0068] The housing 11 is provided with a mounting cavity 11a, a ceramic core hole 13, a conductive connector mounting hole 14, and an adhesive inlet hole 12d. To more clearly describe the structure of each component, the length direction X of the housing is referred to as the first direction, and the diameter direction Y of the ceramic core hole is referred to as the second direction. The length direction X of the housing is perpendicular to the radial direction Y of the ceramic core hole. In one embodiment, the axial direction of the ceramic core hole and the axial direction of the conductive connector mounting hole are the same as the length direction X of the housing. In another embodiment, the radial direction Y of the ceramic core hole includes multiple radial directions, such as Y1, Y2, Y3, Y4, etc.
[0069] The mounting cavity 11a is disposed within the housing 11. An opening 11a1 is provided in the mounting cavity 11a along a first direction on the first end face 10f of the housing 11. A first mounting surface 10g is provided in the mounting cavity 11a along the first direction away from the opening 11a1. At least a portion of the firing unit 200 and the elastic recovery member 300 can be installed into the mounting cavity 11a through the opening 11a1, and one end of the elastic recovery member 300 can abut against the first mounting surface 10g. One end of the ceramic core hole 13 along the first direction and one end of the conductive connector mounting hole 14 along the first direction are both connected to the mounting cavity 11a. The ceramic core hole 13 and the conductive connector mounting hole 14 are spaced apart along a second direction. This separation means that the two are not connected along the second direction, forming an insulating barrier. The glue inlet hole 12d along the second direction... The glue inlet hole 12d is connected to the ceramic core hole 13. One end of the glue inlet hole 12d is connected to the outside of the shell, and the other end is connected to the ceramic core hole 13. Thus, glue dripped from the outside of the shell can be introduced into the ceramic core hole 13 through the glue inlet hole 12d. Along the axial direction of the ceramic core hole, the impact head 60, the first ceramic 32, the conductive sheet 70, and the second ceramic 31 are arranged in sequence in contact with each other in the ceramic core hole 13. The conductive sheet 70 is connected to a high-voltage wire 80. The conductive connector 40 is disposed in the conductive connector mounting hole 14. The conductive abutment 50 includes an extension part 51 and an abutment part 52. The extension part 51 is provided with a first abutment surface 511. After the conductive abutment 50 is connected to the shell 11, the extension part 51 extends into the ceramic core hole 13. The first abutment surface 511 abuts with the end face 31b of the second ceramic. The abutment part 52 is disposed outside the ceramic core hole 13 and abuts with the conductive connector 40.
[0070] The housing 11 of the piezoelectric ignition assembly 100 of this utility model is provided with ceramic core holes 13 and conductive connector mounting holes 14 spaced apart along a second direction. The impact head 60, the first ceramic 32, the conductive sheet 70, and the second ceramic 31 are sequentially arranged in contact within the ceramic core holes 13. The conductive connector 40 is disposed within the conductive connector mounting holes 14. The extension portion 51 of the conductive abutment 50 extends into the ceramic core hole 13 and abuts against the second ceramic 31. Simultaneously, the abutment portion 52 of the conductive abutment 50 abuts against the conductive connector 40 outside the ceramic core hole 13. The lower end of the conductive connector 40 along the first direction forms an electrical connection with the second ceramic 31 through the conductive abutment 50. The upper end of the conductive connector 40 along the first direction forms an electrical connection with the first ceramic 32 through the hammer 90, the elastic recovery member 300, and the impact head 60. The conductive sheet 70 is sandwiched between the first ceramic 32 and the second ceramic 31. Figure 21 As shown, the above components can form a good circuit after installation, resulting in stable ignition and good performance.
[0071] The conductive abutment 50 of this utility model adopts an insert-type abutment with the second ceramic 31 and simultaneously abuts with the conductive connector 40. Its structure is simple. This design can eliminate the original steel cap component and shorten the length of the piezoelectric ceramic, which greatly reduces the material cost. At the same time, compared with the original flat abutment with the ceramic end face, the insert-type abutment method has lower precision requirements for component manufacturing and assembly, which is more conducive to improving the product qualification rate.
[0072] like Figures 18-19 As shown, in one embodiment, the abutting part 52 is provided with a second abutting surface 52a, and the extending part 51 extends into the ceramic core hole 13 along the first direction. The second abutting surface 52a abuts against the lower end face 40b of the conductive connector. The abutting point of the two is provided on the side of the ceramic core hole 13 along the second direction. The conductive abutting member 50 can be inserted into the ceramic core hole 13 in multiple directions to achieve abutment and can be with any part of the conductive connector 40. This vertical insertion along the first direction and abutment with the end face is convenient to connect and the abutment is more stable and reliable.
[0073] like Figure 23As shown, in one embodiment, when the second abutting surface 52a abuts against the conductive connector 40, it can simultaneously abut against the outer end face 131 of the ceramic core hole. With this configuration, using the outer end face 131 of the ceramic core hole as a reference, operation only requires focusing on the conductive abutting component 50 abutting against the outer end face 131 of the ceramic core hole along the first direction to simultaneously achieve abutment with the conductive connector 40, which is beneficial for stable abutment. In another embodiment, when the second abutting surface 52a abuts against the conductive connector 40, it can simultaneously abut against the outer end face 131 of the ceramic core hole and the outer end face 141 of the conductive connector mounting hole. In this case, the outer end face 131 of the ceramic core hole and the outer end face 141 of the conductive connector mounting hole are on the same plane, which is advantageous. For stable contact, in one embodiment, the outer end face 131 of the ceramic core hole, the outer end face 141 of the conductive connector mounting hole, and the second end face 10e (e.g., the lower end face) of the housing 11 along the first direction are set to the same plane L3. With this setting, the conductive abutment 50 can be installed onto the housing without obstruction along the first direction. The operator only needs to tighten or press the conductive abutment 50 so that the second abutment surface 52a abuts against the second end face 10e (e.g., the lower end face) of the housing 11. While realizing that the extension part 51 extends into the ceramic core hole 13 and abuts against the second ceramic 31, reliable contact between the conductive abutment 50 and the conductive connector 40 can be ensured, making the installation simpler and more convenient.
[0074] like Figure 20 As shown, after the conductive abutment 50 is connected to the housing 11, the conductive abutment 50 covers the entire ceramic core hole 13 and abuts against the lower end face 40b of the conductive connector, with at least a portion of the lower end face 40b of the conductive connector exposed outside the conductive abutment 50. Figure 20 As shown, a portion (40b2) of the lower end face 40b of the conductive connector is covered, while a portion of 40b1 is exposed outside the conductive abutment 50. This arrangement allows for easy external observation of whether the conductive abutment 50 has been installed, facilitating product quality inspection.
[0075] It should be noted that in the above-mentioned component contact, at least one of the first contact surface 511, the outer end face 131 of the ceramic core hole, and the outer end face 141 of the conductive connector mounting hole is arranged parallel to the second contact surface 52a. In another embodiment, each of the first contact surface 511, the outer end face 131 of the ceramic core hole, and the outer end face 141 of the conductive connector mounting hole is arranged parallel to the second contact surface 52a. This arrangement allows for a closer fit and a better contact effect during contact. Figures 18-19 As shown, in one embodiment, the extension 51 can be configured as a cylindrical rod, and the first abutting surface 511 is disposed at one end of the cylindrical rod along the first direction, such as the front end. The second ceramic 31 can also be configured as a cylinder, and the diameter of the end face 31b of the second ceramic is less than or equal to the diameter of the first abutting surface 511. This configuration can ensure that the entire end face of the second ceramic 31 is abutted by the first abutting surface 511, resulting in a better abutting effect.
[0076] In one embodiment, the abutment portion 52 may be configured as a circular base, and the extension portion 51 extends protruding from the abutment portion 52 along a first direction. The circular base may be, for example, the head of a screw or bolt.
[0077] In one embodiment, the first direction is perpendicular to the second abutment surface 52a, the second abutment surface 52a is parallel to the first abutment surface 511, the first abutment surface 511 is set as the outer end face of the extension 51 along the first direction, the first abutment surface 511 and / or the second abutment surface 52a can be set as a plane, the abutment contact effect of the plane is good, in one embodiment, the plane is set as a horizontal plane or a vertical plane.
[0078] like Figures 8-9 As shown, the lower end of the ceramic core hole 13 along the first direction includes a stepped hole, which includes a first mounting hole 13b and a second mounting hole 13c. The diameter of the second mounting hole 13c is larger than the diameter of the first mounting hole 13b. At least a portion of the impact head 60, all of the first ceramic 32, at least a portion of the conductive sheet 70, and at least a portion of the second ceramic 31 are disposed in the first mounting hole 13b. The connection structure between the extension part 51 and the second mounting hole 13c is disposed in the second mounting hole 13c. This arrangement allows multiple components to be mounted into the first mounting hole 13b. Inside, the fastening structure is set in the second mounting hole 13c. The mounting and fastening areas of the ceramic core hole 13 are divided into zones. That is, the mating area after each component is installed into the ceramic core hole 13 is not the same area as the fastening connection area between the extension part 51 and the ceramic core hole 13. The mating of each component with the ceramic core hole 13 will not affect the fastening mating of the extension part 51 with the ceramic core hole 13. This ensures both the fixing effect of the extension part 51 with the ceramic core hole 13 and the contact effect between the extension part 51 and the component (second ceramic 31) installed in the ceramic core hole 13, thereby ensuring electrical conductivity. The connector 50 achieves both a stable connection and abutment effect. Furthermore, the diameter of the first mounting hole 13b is smaller than the diameter of the second mounting hole 13c. This allows the first mounting hole 13b to accommodate the need for smaller sizes in higher-cost components such as the ceramic core hole 13, reducing costs. Meanwhile, the second mounting hole 13c does not need to be reduced in size simultaneously, thus not affecting the connection structure's design or its fastening effect. For example, in one embodiment, the lengths of the first ceramic 32 and the second ceramic 31 can be shortened from the existing 4.5mm to a minimum of 2.2mm, preferably to 2.2mm-2. The size of 8mm (e.g., 2.5mm) or the size range takes into account the cost reduction brought about by the reduction in the size of the piezoelectric ceramic, the fact that the function of the piezoelectric ceramic in the entire piezoelectric igniter is not affected, and the fact that the production of the piezoelectric ceramic itself is not affected, thus achieving a balance among the three. The first ceramic 32 is entirely disposed in the first mounting hole 13b, and the second ceramic 31 is entirely or partially disposed in the first mounting hole 13b. The first mounting hole 13b can be adapted to this size, and the second mounting hole 13c therefore has a larger size in the first direction so that the extension part 51 can be inserted and a fastening connection can be achieved.
[0079] The connection structure between the extension portion 51 and the second mounting hole 13c can be configured in various forms, such as a protrusion, a groove, a threaded structure, or a snap-fit structure. In one embodiment, the inner wall of the ceramic core hole 13 or the inner wall 13c2 of the second mounting hole 13c can be provided with an internal thread. The extension portion 51 is configured as a cylindrical rod, and its outer circumferential surface is provided with an external thread that can form a threaded connection with the internal thread. With this configuration, the extension portion 51 can achieve a more precise fastening connection and abutment through the preset threaded connection. Compared with free connection methods such as heat tapping, this method has better connection consistency and better connection accuracy, and can ensure a better abutment effect.
[0080] In one embodiment, the extension portion 51 and the ceramic core hole 13 can be connected and fixed by a threaded connection or a snap-fit method. There are various threaded connection methods. The threaded connection between the extension portion 51 and the ceramic core hole 13 can be achieved by any of the following methods: Pre-set thread fit: The inner wall of the ceramic core hole 13 is pre-threaded, and the extension portion 51 is provided with a matching external thread. The two are screwed together and fixed; Self-tapping thread connection: The ceramic core hole 13 is a smooth hole, and the extension portion 51 is a self-tapping threaded part. Threads are tapped on the hole wall by hot-melt self-tapping or room temperature self-tapping and then tightened. The above connection methods can achieve a relatively firm connection effect.
[0081] In the above embodiments, the extension portion 51 extends into the first mounting hole 13b, the second mounting hole 13c, or the junction of the first mounting hole 13b and the second mounting hole 13c to abut against the second ceramic 31. The specific method can be selected according to the component size or the stability and abutment effect. In one embodiment, at least a portion of the second ceramic 31 can extend into the second mounting hole 13c or the junction with the first mounting hole 13b, and the extension portion 51 abuts against the second ceramic 31 in the second mounting hole 13c or at the junction. This arrangement allows the extension portion 51 to abut without extending into the first mounting hole 13b, making the abutment simple. In another embodiment, at least a portion of the extension portion 51 extends into the first mounting hole 13b to abut against the second ceramic 31. This arrangement relies on the guidance of the first mounting hole 13b to achieve precise and stable abutment.
[0082] In one embodiment, the extension portion 51 is configured as a cylindrical rod with a connecting portion 51b on its outer surface. The connecting portion 51b is provided with a connecting structure 51b1, which is connected to the inner wall 13c2 of the second mounting hole 13c. The connecting structure 51b1 can be an external thread, which is connected to the inner wall 13c2 by a self-tapping method. Alternatively, the inner wall 13c2 is provided with a connecting structure, such as an internal thread, with the external thread and internal thread engaging. Or, the connecting structure 51b1 can be a protrusion or a groove, and the inner wall 13c2 is provided with a groove and a protrusion that engage with the protrusion or groove. The connection method between the outer surface of the cylindrical rod and the inner wall 13c2 can achieve a stable connection.
[0083] like Figures 8-9 As shown, in one embodiment, a guide portion 51a is provided at the front end of the connecting portion 51b along the first direction of the cylindrical rod. The diameter of the guide portion 51a is smaller than the diameter of the connecting portion, so that the cylindrical rod can easily enter the ceramic core hole 13, which can improve the installation speed. In another embodiment, a sealing structure 51c is provided at the rear end of the connecting portion 51b along the first direction of the cylindrical rod. The second mounting hole 13c is provided with a countersunk platform 13d that cooperates with the sealing structure 51c. The sealing structure 51c can prevent the glue in the ceramic core hole 13 from overflowing when negative pressure is drawn, thereby improving the cleanliness of the product and avoiding subsequent glue removal processes.
[0084] In one embodiment, the conductive contact is a metal screw, such as a steel nail. The screw shank is an insertion portion, the head of the metal screw is an abutment portion, and the end face of the screw shank along the first direction is a plane (first abutment surface 511). In another embodiment, the inner surface of the head of the metal screw is provided with a plane (second abutment plane 52a), and the outer surface of the metal screw may be provided with a groove 52b, such as a cross groove or a Torx groove. The screw is low in cost, easy to connect, and can achieve a stable connection effect.
[0085] In this invention, the ceramic core hole 13 and the conductive connector mounting hole 14 extend away from the first end face 10f along the first direction, that is, both extend away from the first end face 10f, but the projections of their actual extending directions onto a plane perpendicular to the first direction can be parallel or intersecting (for example, the projections of the central axes of the ceramic core hole 13 and the conductive connector mounting hole 14 onto a plane perpendicular to the first direction are parallel or intersecting). Figure 8As shown, in one embodiment, the mounting cavity 11a is provided with a first mounting surface 10g along a first direction away from the opening 11a1. One end of the conductive connector mounting hole 14 is disposed on the first mounting surface 10g (L1 plane), and the other end extends along the first direction away from the first end face 10f (e.g., the upper end face) of the housing to the second end face 10e (e.g., the lower end face) of the housing opposite to the first end face 10f. One end 11b of the ceramic core hole 13 protrudes from the first mounting surface 10g along the first direction toward the first end face 10f (e.g., the upper end face) of the housing 11, and the other end extends along the first direction away from the first end face 10f of the housing. To the second end face 10e (e.g., the lower end face) opposite to the first end face 10f, in one embodiment, the ceramic core hole 13 and the conductive connector mounting hole 14 both extend away from the first end face 10f along the first direction (e.g., the upper end face). The axis X2 of the conductive connector mounting hole is arranged parallel to the axis X1 of the ceramic core hole. With this arrangement, when the elastic recovery member 300 is installed on the first mounting surface 10g, it can be sleeved on one end 11b of the ceramic core hole 13, and the elastic recovery member 300 can easily contact the conductive connector 40 disposed on the side of the ceramic core hole 13, which is beneficial to the stable installation and contact of the elastic recovery member 300.
[0086] In one embodiment, a glue-dispensing groove 12 is provided on the surface of the housing 11, and a glue inlet hole 12d is provided on the bottom surface (glue-dispensing bottom surface 12b) of the glue-dispensing groove 12. The glue inlet hole 12d is located at one end of the glue-dispensing groove 12 along the second direction. The glue-dispensing groove 12 can be formed by a barrier 12a protruding / recessed relative to the first side surface 10a. In one embodiment, the barrier 12a is the shell wall of the housing 11. The barrier 12a protrudes relative to the first side surface 10a of the housing, and the barrier 12a forms the glue-dispensing groove 12, where glue can be dispensed and enter the ceramic core hole 13 through the glue inlet hole 12d. The glue-dispensing groove 12 can be circular or rectangular. In one embodiment, the glue-dispensing bottom surface 12b can be a part of the first side surface 10a or it can be set separately. A guide slope 12b1 is provided on the side of the glue-dispensing bottom surface 12b near the glue inlet hole 12d, so as to facilitate the flow of glue in the glue-dispensing groove into the glue inlet hole 12d. Figure 10 As shown, in one embodiment, the glue inlet 12d divides the glue-drip bottom surface 12b into a first glue-drip bottom surface 12b2 and a second glue-drip bottom surface 12b3 spaced apart from each other along a first direction. With this arrangement, glue can flow into the glue inlet 12d from the first glue-drip bottom surface 12b2 and the second glue-drip bottom surface 12b3. Since the glue inlet 12d is located at the end of the glue-drip groove, glue can only flow into the glue inlet 12d from one bottom surface. This arrangement provides better glue flow. In one embodiment, the enclosure 12a is provided with an auxiliary protrusion 12c to facilitate the installation of the high-voltage wire 80, such as... Figure 8 , Figure 10 , Figure 15As shown, in one embodiment, the glue inlet hole 12d is provided with two auxiliary protrusions 12c. The auxiliary protrusions 12c can protrude from the housing 11 toward the glue inlet hole 12d. The two auxiliary protrusions 12c and the glue inlet hole 12d are provided with a first gap 12e along the glue inlet hole housing wall 12d1 in the first direction. The two auxiliary protrusions 12c are provided with a second gap 12f along the radial direction Y perpendicular to the first direction. The first gap 12e allows the conductive sheet 70 to be installed into the ceramic core hole 13 through the glue inlet hole 12d to improve the ease of installation. The second gap 12f allows a part of the conductive sheet 70 to be disposed in the gap to improve the support effect. The auxiliary protrusions 12c can directly contact the conductive sheet 70 to support the conductive sheet 70, or the auxiliary protrusions 12c can not contact the conductive sheet 70 but form a whole after the glue solidifies to support the conductive sheet 70.
[0087] like Figure 5 , Figure 11 , Figure 12 As shown, the housing 11 includes a first housing 111 and a second housing 112 along a first direction. A mounting cavity 11a and an adhesive inlet 12d are disposed on the first housing 111. A ceramic core hole 13 and a conductive connector mounting hole 14 are simultaneously disposed on both the first housing 111 and the second housing 112. In one embodiment, the ceramic core hole on the second housing 112 is provided with a first arc-shaped shell wall 112a, and the conductive connector mounting hole on the second housing 112 is provided with a second arc-shaped shell wall 112b. The second arc-shaped shell wall 112b is disposed on the first arc-shaped shell wall 112a. Figure 12 As shown, in one embodiment, any cross section of the second housing 112 in the first direction includes two circles. The first circle 14-1 moves along the second direction (Y1 / Y2) and overlaps with at least a portion of the second circle 13-1 (e.g., overlapping portion 14-3). The above arrangement can reduce the material used in the second housing 112, facilitate the modification and generalization of the original mold, and further save costs.
[0088] like Figure 4 , Figure 5 , Figure 11As shown, in one embodiment, at least a portion of the cross-section of the first housing 111 is rectangular, the first side 10a and the second side 10b are two opposite sides of the rectangle, and the third side 10c and the fourth side 10d are the other two opposite sides of the rectangle. A first notch 11e1 is provided on the housing 11, located on the first side 10a and along the second direction on the left and right sides of the dispensing groove 12. In one embodiment, a second notch 11e2 is also provided on the housing 11, located on the first side 10a and along the second direction on the left and right sides of the dispensing groove 12. On the second side 10b, the material used in the first housing 111 can be further reduced by setting a hole, thus saving costs. In one embodiment, the cross section of the first housing 111 at the drip groove 12 includes two circles. The third circle 13-2 of the two circles moves along the second direction (Y1 / Y2) and is staggered with the fourth circle 14-2 (the two do not overlap). In another embodiment, the third circle 13-2 of the two circles moves along the second direction (Y1 / Y2) and overlaps with at least a part of the first notch 11e1 and / or the second notch 11e2. With this arrangement, the above-mentioned areas are reasonably arranged on the housing 11, and the strength of each area can be taken into account.
[0089] like Figures 4-5 As shown, in one embodiment, the third side 10c and the fourth side 10d are set as smooth surfaces without functional holes, which can ensure the structural strength of the housing.
[0090] like Figure 9 As shown, in one embodiment, the first housing end face 10e1 of the first housing 111 along the first direction and the end face (L2 plane) of the dispensing tank 12 along the first direction are on the same plane. With this arrangement, the second housing 112 does not have other functional areas, ensuring its simple structure, allowing it to use the original mold and saving costs. In another embodiment, along the first direction, the top surface 13c1 of the second mounting hole is closer to the first mounting surface 10g than the first housing end face 10e1 of the first housing 111. This arrangement allows the extension portion 51 to extend into the first housing 111, thereby further reducing the length of the piezoelectric ceramic to reduce costs.
[0091] This utility model also provides a piezoelectric igniter, which includes the aforementioned piezoelectric ignition assembly 100, a firing unit 200 that can be installed into the mounting cavity 11a, and an elastic return member 300. The user can operate the firing unit 200 to store and release energy. The piezoelectric ceramic within the piezoelectric ignition assembly 100 generates a high-voltage electric pulse upon impact. The elastic return member 300 provides a restoring force to drive the firing unit 200 back to its initial position. The firing unit 200 can adopt an existing mature structure, as long as it can fire the piezoelectric ignition assembly 100. Figure 24A firing unit 200 is shown, which includes a firing housing 21, a hammer 90 and an elastic return member 300 that can be installed into a mounting cavity 21a of the firing housing 21. One end of the elastic return member 300 is connected to one end of the hammer 90 along a first direction, and the other end is installed to the first mounting surface 10g of the housing 11 and simultaneously abuts against the upper end surface 40a1 of the conductive connector. The hammer 90 is fired and reset by cooperating with the moving groove 19 / 19a structure provided on the housing 11 through its moving protrusion 91. The specific implementation structure can adopt existing mature structures, which will not be described in detail here.
[0092] This utility model also provides an ignition device, which includes the above-mentioned piezoelectric igniter and a fuel unit. The piezoelectric igniter is configured to ignite the fuel in the fuel unit. The ignition device can be, for example, a lighter, a burner, etc.
[0093] It should be noted that the fact that the impact head 60, the first ceramic 32, the conductive sheet 70, and the second ceramic 31 are disposed within the ceramic core hole 13 does not mean that all of the above components are disposed within the ceramic core hole 13. It is sufficient that at least a portion of the above components are disposed within the ceramic core hole 13. In one embodiment, the first ceramic 32 and the second ceramic 31 are disposed entirely within the ceramic core hole 13, and a portion of the conductive sheet 70 and / or the impact head 60 is disposed within the ceramic core hole 13. The sequential contact arrangement of the above components means that the bottom surface of the impact head 60 contacts the top surface 32a of the first ceramic, the bottom surface 32b of the first ceramic contacts the first conductive sheet end face 711 of the conductive sheet 70, the other end face of the conductive sheet 70—the second conductive sheet end face 712—contacts the top surface 31a of the second ceramic, and the end face 31b of the second ceramic (e.g., the bottom surface) contacts the conductive abutment 50.
[0094] In one embodiment, the housing 11 is a plastic housing, which can be integrally injection molded or separately injection molded and then joined together, for example, injection molded into two half-housing units and then assembled into one unit.
[0095] like Figure 16As shown, in one embodiment, the impact head 60 is made of metal and is disposed at the end of the ceramic core hole 13 along the first direction. It includes a circular base 62 and a circular cylinder 61 protruding from the circular base 62 along the first direction. In one embodiment, the diameter of the circular base 62 is larger than the diameter of the circular cylinder 61. The upper end of the ceramic core hole 13 along the first direction includes stepped holes with different diameters. The stepped holes include an end hole 13a and a first mounting hole 13b. The circular base 62 is disposed in the first mounting hole 13b, and the circular cylinder 61 is disposed in the end hole 13a. In one embodiment, at least a portion of the circular cylinder 61 extends out of the ceramic core hole 13 along the first direction. In one embodiment, the impact head 60 extends into the mounting cavity 11a, allowing the impact head 60 to be directly struck by the hammer 90 outside the ceramic core hole 13. In another embodiment, the top surface 61a and bottom surface 62a of the circular cylinder 61 along the first direction are both set as planes and are parallel to the top and bottom surfaces of the first ceramic 32 and the second ceramic 31. The top surface 62b of the circular base 62 along the first direction abuts against the top surface 13b1 of the first mounting hole 13b along the first direction, thereby enabling more stable installation and receiving the impact of the hammer 90. In another embodiment, the impact head 60 is set as a rivet, which is inexpensive and can achieve the above functions.
[0096] like Figure 17 As shown, the first ceramic 32 and the second ceramic 31 are cylindrical piezoelectric ceramics. In one embodiment, the first ceramic 32 and the second ceramic 31 have the same length. In another embodiment, the diameter and length of the first ceramic 32 and / or the second ceramic 31 are different. This arrangement facilitates automatic material selection by the machine, thereby facilitating automated production.
[0097] like Figure 13 As shown, in one embodiment, the conductive connector 40 is configured as a metal needle, such as a pin or a dowel. In another embodiment, the lower end face 40b of the conductive connector 40 along the first direction abuts against the abutting portion 52 of the conductive abutting member 50 to form an electrical connection with the second ceramic 31. The upper end 40a of the conductive connector 40 along the first direction forms an electrical connection with the first ceramic 32 through an intermediate conductive method (e.g., through a single piece or multiple pieces combined). In one embodiment, for example, an electrical connection is formed with the first ceramic 32 through a hammer 90, an elastic recovery member 300, and an impact head 60. Figure 21 , Figure 23 As shown, one specific method is to set the elastic restoring member 300 as a metal spring, with one end connected to the metal hammer 90 and the other end set on the first mounting surface 10g while abutting against the upper end surface 40a1 of the conductive connector, thereby forming a reliable and stable electrical connection.
[0098] like Figures 14-15As shown, in one embodiment, the conductive sheet 70 is a metal sheet, such as a steel sheet or a phosphor bronze sheet, etc. Figures 14-15 As shown, the conductive sheet 70 is provided with a contact portion 71, an extension portion 72, and a snap-fit portion 73 along a radial direction Y3. The contact portion 71 is provided with a first conductive sheet end face 711 and a second conductive sheet end face 712, which can contact the first ceramic 32 and the second ceramic 31 respectively. The snap-fit portion 73 is provided with a U-shaped notch so that one end of the high-voltage wire 80 can be inserted into the notch for fixation. In one embodiment, after the conductive sheet 70 is installed into the ceramic core hole 13, the contact portion 71 is located in the ceramic core hole 13, and the extension portion 72 / snap-fit portion 73 is located in the glue inlet hole 12d or the glue drip groove 12. Along the Y3 direction, an auxiliary protrusion 12c is provided between the contact portion 71 and the snap-fit portion 73. In one embodiment, the conductive sheet 70 is provided as a near-circular thin sheet, and the outer peripheral surface of the contact portion 71 is provided with an arc-shaped portion 71a and a straight portion 71b, so as to facilitate the installation of the contact portion 71 into the ceramic core hole 13.
[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0100] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.
Claims
1. A piezoelectric ignition assembly, characterized in that, include: The housing and the conductive abutment connected to the housing, the housing being provided with an installation cavity, a ceramic core hole, a conductive connector installation hole and an adhesive inlet hole; Along the first direction, the first end face of the housing is provided with an opening, and the opening communicates with the mounting cavity; The ceramic core hole and the conductive connector mounting hole are located away from the first end face along the first direction and are isolated from each other. One end of the ceramic core hole and the conductive connector mounting hole are connected to the mounting cavity. Along the second direction, the glue inlet hole is connected to the ceramic core hole; A conductive connector is installed in the conductive connector mounting hole. Along the first direction, the impact head, the first ceramic, the conductive sheet, and the second ceramic are sequentially arranged and installed into the ceramic core hole. The conductive sheet is connected to a high-voltage wire. The conductive abutment includes an insertion portion and an abutment portion along the first direction. The insertion portion is provided with a first abutment surface. After the conductive abutment is connected to the housing, the insertion portion extends into the ceramic core hole. The first abutment surface abuts against the end face of the second ceramic. The abutment portion is disposed outside the ceramic core hole and abuts against the conductive connector. The first direction is the length direction of the shell, and the second direction is the radial direction of the ceramic core hole perpendicular to the first direction.
2. The piezoelectric ignition assembly according to claim 1, characterized in that, The abutting part is provided with a second abutting surface. When the extending part extends into the ceramic core hole along the first direction, the second abutting surface can abut against the lower end surface of the conductive connector along the first direction.
3. The piezoelectric ignition assembly according to claim 2, characterized in that, When the second contact surface abuts against the lower end surface of the conductive connector, it can simultaneously abut against the outer end surface of the ceramic core hole.
4. The piezoelectric ignition assembly according to claim 2, characterized in that, When the second contact surface abuts against the conductive connector, it can simultaneously abut against the outer end face of the ceramic core hole and the outer end face of the conductive connector mounting hole.
5. A piezoelectric ignition assembly according to claim 2, characterized in that, After the conductive abutment is connected to the housing, the conductive abutment covers the entire ceramic core hole and abuts against the lower end face of the conductive connector, and at least a portion of the conductive connector is exposed outside the conductive abutment.
6. A piezoelectric ignition assembly according to any one of claims 2-5, characterized in that, At least one of the first abutting surface, the outer end face of the ceramic core hole, and the outer end face of the conductive connector mounting hole is parallel to the second abutting surface.
7. A piezoelectric ignition assembly according to claim 1, characterized in that, The extension portion is configured as a cylindrical rod, the first contact surface is disposed at one end of the extension portion along a first direction, the second ceramic is configured as a cylinder, and the diameter of the end face of the second ceramic is less than or equal to the diameter of the first contact surface.
8. A piezoelectric ignition assembly according to claim 1, characterized in that, The ceramic core is provided with a first mounting hole and a second mounting hole of different diameters along the first direction. The diameter of the second mounting hole is larger than that of the first mounting hole. A part of the impact head, the entire first ceramic, a part of the conductive sheet, and a part of the second ceramic are disposed in the first mounting hole. The connection structure between the extension part and the second mounting hole is disposed in the second mounting hole.
9. A piezoelectric ignition assembly according to claim 1, characterized in that, The inner wall of the ceramic core hole is provided with an internal thread, the extension part is provided with a cylindrical rod, and the outer circumferential surface of the extension part is provided with an external thread that forms a threaded engagement with the internal thread.
10. A piezoelectric ignition assembly according to claim 1, characterized in that, The insertion part is connected and fixed to the ceramic core hole by a threaded connection or a snap-fit method.
11. A piezoelectric ignition assembly according to claim 1, characterized in that, The conductive contact is configured as a metal screw, with the screw shaft portion being an insertion portion and the head of the metal screw being an abutment portion. The end face of the screw shaft portion along the first direction is configured as a plane.
12. A piezoelectric ignition assembly according to claim 1, characterized in that, The mounting cavity is provided with a first mounting surface away from the opening along a first direction. One end of the conductive connector mounting hole is provided on the first mounting surface, and the other end extends away from the first end face of the housing along the first direction to the second end face of the housing opposite to the first end face. One end of the ceramic core hole protrudes from the first mounting surface toward the first end face of the housing, and the other end extends away from the first end face of the housing along the first direction to the second end face of the housing opposite to the first end face. The axis of the conductive connector mounting hole is parallel to the axis of the ceramic core hole.
13. A piezoelectric ignition assembly according to claim 1, characterized in that, The surface of the housing is provided with a dispensing groove, and the dispensing hole is provided on the bottom surface of the dispensing groove. The dispensing hole divides the bottom surface of the dispensing groove into a first dispensing bottom surface and a second dispensing bottom surface that are spaced apart from each other along a first direction.
14. A piezoelectric ignition assembly according to any one of claims 1-5 or 7-13, characterized in that, The housing includes a first housing and a second housing along a first direction. The mounting cavity and the glue inlet hole are disposed in the first housing, and the ceramic core hole and the conductive connector mounting hole are disposed in both the first housing and the second housing.
15. A piezoelectric ignition assembly according to claim 14, characterized in that, The ceramic core hole on the second housing is provided with a first arc-shaped shell wall, and the conductive connector mounting hole on the second housing is provided with a second arc-shaped shell wall, which is disposed on the first arc-shaped shell wall.
16. A piezoelectric ignition assembly according to claim 14, characterized in that, The cross-section of the second housing comprises two circles, and the first circle of the two circles moves along the second direction to overlap with at least a portion of the second circle.
17. A piezoelectric igniter, characterized in that, Includes the piezoelectric ignition assembly as described in any one of claims 1-16, a firing unit that can be installed into the mounting cavity, and an elastic return member, wherein the firing unit includes a hammer, and one end of the elastic return member is connected to the hammer along a first direction, and the other end is disposed in the mounting cavity and in contact with the conductive connector.
18. A ignition device, characterized in that, It includes a fuel unit and a piezoelectric igniter as claimed in claim 17, the piezoelectric igniter being configured to ignite the fuel in the fuel unit.