Negative electrode connecting structure of battery and handheld fire-collecting rod

Abstract

The utility model provides a negative electrode connecting structure of a battery and a handheld fire-collecting rod, and belongs to the technical field of fire-collecting rods. The negative electrode connecting structure of the battery comprises a shell, an end cover, a negative electrode elastic sheet and a negative electrode spring, wherein a battery bin is arranged in the shell; the battery is placed; the bottom end of the shell is open and is communicated with the battery compartment; the negative spring is arranged in the shell, the bottom end of the negative spring is close to the bottom end of the shell, the top end of the negative spring is connected with the shell, and the negative elastic piece is arranged on the inner side of the end cover. And when the end cover is buckled at the bottom end of the shell, the negative elastic sheet is in contact with the negative electrode of the battery arranged in the battery compartment and the negative spring. As the negative elastic sheet is mounted on the inner side of the end cover, the negative spring is arranged in the shell, and the negative elastic sheet and the negative spring are not directly exposed outside, the whole connecting structure is tidier and more attractive, and meanwhile, the short circuit risk or other potential safety hazards possibly caused by exposed wires are also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-picking rods, in particular to a negative electrode connection structure of a battery and a handheld fire-picking rod. Background Art

[0002] In traditional handheld fire sticks, the negative pole of the battery is usually connected to the electrical equipment (such as the ignition circuit) through one or more wires. Although this method is simple and easy to use, it exposes many problems in actual use. First, this rigid connection method lacks sufficient elasticity. When the device is subjected to external impact or vibration, it is easy to cause poor contact between the wire and the battery, or even complete disconnection, affecting the normal operation of the device. Secondly, the wires are easily worn inside the device, and after long-term use, the contact resistance may increase, affecting the power supply efficiency of the battery. More importantly, when replacing the battery, if the end cover is removed, the exposed wires are not only unsightly, but also easy to be accidentally torn off, causing inconvenience to the user. Utility Model Content

[0003] In response to the above problems, the purpose of the present utility model is to provide a battery negative electrode connection structure and a handheld fire-fighting device that can effectively prevent the problems of poor contact and easy damage of wires caused by traditional wire connection methods, and can also make improvements in aesthetics and user safety, thereby enhancing the overall performance of the product and user experience.

[0004] In a first aspect, a negative electrode connection structure of a battery is provided, comprising a housing, an end cover, a negative electrode spring, and a negative electrode spring:

[0005] A battery compartment is provided in the housing;

[0006] The bottom end of the housing is open and communicates with the battery compartment;

[0007] The negative pole spring is arranged in the housing, the bottom end of the negative pole spring is close to the bottom end of the housing, and the top end of the negative pole spring is connected to the housing;

[0008] The negative electrode spring is arranged on the inner side of the end cover;

[0009] When the end cover is buckled at the bottom end of the housing, the negative electrode spring contacts the negative electrode of the battery disposed in the battery compartment and the negative electrode spring.

[0010] Furthermore, a clamping groove is provided on the inner side of the end cover, and the negative electrode spring is clamped in the clamping groove.

[0011] Furthermore, the negative electrode spring includes a battery connecting portion, a connecting portion, a clamping portion and a spring connecting portion;

[0012] The battery connecting portion is arranged above the clamping portion;

[0013] One end of the battery connecting portion is fixedly connected to one end of the clamping portion through the connecting portion;

[0014] The other end of the clamping portion is connected to the spring connecting portion.

[0015] Further, the spring connecting portion includes a spring contact portion and a contact connecting portion;

[0016] The outer end of the contact connection portion is fixedly connected to the bottom end of the spring contact portion, and the inner end is fixedly connected to the other end of the clamping portion;

[0017] The spring contact portion and the clamping portion are parallel to each other and are respectively located on both sides of the contact connection portion;

[0018] The tip of the spring contact portion contacts the negative electrode spring.

[0019] Furthermore, it also includes a contact piece;

[0020] A mounting protrusion is provided in the housing;

[0021] A snap-fitting recess is provided in the middle of the contact piece, and the snap-fitting recess is adapted to snap-fit ​​with the mounting protrusion;

[0022] The bottom end of the contact piece is fixedly connected to the top end of the negative electrode spring.

[0023] Furthermore, the contact sheet is formed by bending a metal sheet multiple times, and the clamping recess is formed in the middle of the metal sheet.

[0024] Furthermore, it also includes a positive electrode shrapnel;

[0025] The positive electrode spring is installed at one end of the battery compartment away from the end cover.

[0026] In a second aspect, a handheld fire stick is provided, comprising a negative electrode connection structure of a battery as described in the above technical solution.

[0027] Further, including a circuit board and a ground spring;

[0028] The top end of the negative electrode spring is connected to the negative electrode connection point of the circuit board;

[0029] One end of the grounding spring is connected to the circuit board, and the other end is connected to the housing.

[0030] Furthermore, the grounding spring is connected to the negative electrode spring or the negative electrode spring.

[0031] The embodiments of the present invention have the following advantages or beneficial effects:

[0032] By making the negative electrode spring arranged on the inner side of the end cover contact with the negative electrode spring in the outer shell, the elastic characteristics of the spring are utilized to ensure good contact pressure between the negative electrode of the battery and the negative electrode spring. Even when the device is subjected to external force, a stable electrical connection can be maintained, thereby improving the reliability of the connection.

[0033] The user only needs to buckle the end cap on one end of the shell to achieve automatic contact and connection between the negative electrode spring and the negative electrode spring, which simplifies the battery installation process and makes battery replacement faster and more convenient.

[0034] Since the negative electrode spring is installed on the inner side of the end cover and the negative electrode spring is set inside the outer shell, neither of them is directly exposed to the outside. This not only makes the entire connection structure neater and more beautiful, but also avoids the risk of short circuit or other safety hazards caused by exposed wires.

[0035] Compared with traditional rigid wire connections, elastic connections can better adapt to small displacement changes inside the equipment, reduce wear caused by vibration or impact, and thus extend the service life of the connection parts and related components.

[0036] This connection structure cleverly utilizes the space of the existing casing and arranges the negative pole spring inside the casing, which not only saves space but also makes the structure of the entire device more compact and reasonable, helps to reduce the size of the device and improve portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0038] Figure 1 is a front view of a handheld fire stick according to an exemplary embodiment;

[0039] Figure 2 yes Figure 1 AA section view;

[0040] Figure 3 yes Figure 2 A magnified view of part B in FIG;

[0041] Figure 4 is a side view of a handheld fire stick according to an exemplary embodiment;

[0042] Figure 5 yes Figure 4 CC cross-sectional view;

[0043] Figure 6 yes Figure 5 Enlarged view of part D in FIG;

[0044] Figure 7 yes Figure 5 Enlarged view of part E in FIG;

[0045] Figure 8 yes Figure 4 FF cross-sectional view;

[0046] Figure 9 yes Figure 8 Magnified view of section G in .

[0047] The description of the accompanying drawings is as follows:

[0048] 1. Housing, 2. End cap, 3. Negative electrode spring, 4. Negative electrode spring, 5. Mounting protrusion, 6. Contact piece, 7. Positive electrode spring, 8. Circuit board, 9. Ground spring, 10. Snap-fit ​​groove, 11. Snap-fit ​​recess;

[0049] 31. Battery connection portion, 32. Connecting portion, 33. Clamping portion, 34. Spring connection portion;

[0050] 341. Spring contact portion, 342. Contact connection portion. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0052] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0053] Figure 1 is a front view of a handheld fire stick according to an exemplary embodiment; Figure 2 yes Figure 1 AA section view; Figure 3 yes Figure 2 A magnified view of part B in FIG; Figure 4 is a side view of a handheld fire stick according to an exemplary embodiment; Figure 5 yes Figure 4 CC cross-sectional view; Figure 6 yes Figure 5 Enlarged view of part D in FIG; Figure 7 yes Figure 5 Enlarged view of part E in FIG; Figure 8 yes Figure 4 FF cross-sectional view; Figure 9 yes Figure 8 The above diagram is only for the purpose of illustrating the structural relationship related to the utility model and is not intended to be an actual scale of the actual product.

[0054] like Figures 1 to 9 As shown, a negative electrode connection structure of a battery in an embodiment of the present invention includes a shell 1, an end cover 2, a negative electrode spring 3 and a negative electrode spring 4: a battery compartment is provided in the shell 1; it is used to place the battery; the bottom end of the shell 1 is open and connected with one end of the battery compartment; the negative electrode spring 4 is provided in the shell 1, the bottom end of the negative electrode spring 4 is close to the bottom end of the shell 1, and the top end of the negative electrode spring 4 is connected to the shell 1; the negative electrode spring 3 is provided on the inner side of the end cover 2; when the end cover 2 is buckled at the bottom end in the shell 1, the negative electrode spring 3 contacts the negative electrode of the battery provided in the battery compartment and the negative electrode spring 4, connecting the negative electrode of the battery and the negative electrode spring 4.

[0055] Among them, the main part of the shell 1 is a cylindrical structure. There is a battery compartment inside the shell 1 specifically for placing batteries. The size design of this battery compartment matches the specifications of the batteries used to ensure that the batteries can be placed firmly therein without shaking. One end of the shell 1 (the bottom end in this embodiment) is provided with an opening for facilitating the insertion and removal of the battery, and the opening is connected to the battery compartment. The shell 1 is usually made of materials with good mechanical strength and corrosion resistance. Commonly used materials include but are not limited to plastics (such as ABS, PC) and metals (such as aluminum alloys). Among them, plastic shells 1 are widely used because of their light weight and easy processing and molding; metal shells 1 are commonly found in some high-end or professional equipment because of their higher durability and heat dissipation performance.

[0056] The end cap 2 is designed with a specialized snap-fit ​​mechanism that tightly fits over the edge of the opening of the housing 1, allowing the end cap 2 to securely close the open end of the housing 1 while ensuring accurate contact between the negative electrode spring 3 and the negative electrode spring 4 within the housing 1. The inner side of the end cap 2 is provided with a mounting location for the negative electrode spring 3, typically a groove or slot, to facilitate positioning and securing the negative electrode spring 3. The shape of the end cap 2 matches the shape of the open end of the housing 1, typically being a flat circular shape, though the specific shape depends on the design of the housing 1. The dimensions of the end cap 2 should be slightly larger than the dimensions of the open end to ensure complete coverage and closure. The end cap 2 can be made of either plastic or metal, but plastic is typically chosen for ease of processing and cost reduction. Plastic end caps 2 can be manufactured through injection molding, making them easy to mass-produce. If metal is chosen, an alloy with a certain degree of elasticity and strength, such as stainless steel or an aluminum-magnesium alloy, is typically used. This ensures the end cap 2's robustness while also providing a certain degree of elastic deformation for ease of installation and removal.

[0057] To prevent dust or moisture from entering the device, a sealing ring or gasket may be added to the interface between the end cap 2 and the housing 1 to improve the overall sealing performance. The design of the end cap 2 takes into account the user's operational convenience. Anti-slip grooves or grooves may be provided on the outside of the end cap 2 to facilitate manual tightening or unscrewing by the user.

[0058] The inner side of the end cap 2 is provided with a snap-in groove 10, into which the negative electrode spring 3 is snapped. The snap-in groove 10 is typically located in the center of the end cap 2 to ensure that the negative electrode spring 3 can evenly apply force to the negative electrode spring 4. The shape and size of the snap-in groove 10 match the negative electrode spring 3, ensuring that the spring is smoothly snapped in and remains stable. The depth and width of the snap-in groove 10 are precisely calculated to ensure that the negative electrode spring 3 does not easily fall off while not complicating the installation process.

[0059] In one embodiment, the negative electrode spring 3 includes a battery connection portion 31, a connecting portion 32, a clamping portion 33, and a spring connection portion 34. The battery connection portion 31 is positioned above the clamping portion 33. One end of the battery connection portion 31 is fixedly connected to one end of the clamping portion 33 via the connecting portion 32. The other end of the clamping portion 33 is connected to the spring connection portion 34. The battery connection portion 31, the connecting portion 32, and the clamping portion 33 form a horizontally positioned U-shape. This shape not only facilitates the installation and fixation of the negative electrode spring 3, but also ensures that the negative electrode spring 3 can evenly distribute the force when subjected to pressure, avoiding damage caused by excessive local stress.

[0060] The battery connector 31 directly contacts the negative terminal of the battery, conducting current. It must be designed to ensure good contact with the battery and resist damage during battery insertion or removal. The battery connector 31 is typically a flat metal sheet to ensure good electrical contact.

[0061] The connecting portion 32 is located between the battery connector 31 and the latching portion 33, securing the two components. The design of the connecting portion 32 must ensure a secure connection while also being flexible enough to allow for a certain range of deformation. It may be designed in a curved or zigzag shape to provide the necessary elastic deformation space.

[0062] The clamping portion 33 is used to fix the negative electrode spring 3 in the clamping groove 10 of the end cover 2 to ensure that the spring will not fall out during use. The shape and size of the clamping portion 33 must match the clamping groove 10 on the end cover 2 to ensure a secure installation.

[0063] The spring connector 34 is responsible for contacting the negative spring 4, transferring current to the negative spring 4, and then connecting to the circuit board 8 or other electrical equipment. The design of the spring connector 34 must ensure effective contact with the negative spring 4 and be able to withstand a certain pressure. It is designed with a specific curved or hooked structure to ensure effective contact with the negative spring 4.

[0064] The negative electrode spring 3 is typically made of a material with good electrical conductivity and elasticity. Common materials include, but are not limited to, phosphor bronze, stainless steel, or copper alloys. These materials not only have excellent electrical conductivity but can also withstand repeated bending without fatigue fracture, ensuring the spring's reliability over extended use.

[0065] The processing of the negative electrode shrapnel 3 usually adopts a precision stamping process. First, prepare a suitable sheet according to the design drawing, and then stamp it into shape through a mold. During the stamping process, the sheet is formed into the desired shape by the pressure of the mold, while ensuring that the dimensional accuracy of each part meets the design requirements. The negative electrode shrapnel 3 after forming may undergo heat treatment (such as tempering) to adjust the hardness and elasticity of the material to ensure that the shrapnel can maintain appropriate elasticity during use and avoid premature fatigue. Surface treatment is to improve the corrosion resistance and aesthetics of the shrapnel. Common surface treatment methods include electroplating (such as nickel plating, silver plating), spraying or chemical treatment (such as passivation treatment). These treatment methods can improve the conductivity and durability of the shrapnel.

[0066] In one embodiment, the spring connection portion 34 includes a spring contact portion 341 and a contact connection portion 342. The outer end of the contact connection portion 342 (the end closest to the surface of the handheld fire stick) is fixedly connected to the bottom end of the spring contact portion 341, and the inner end (the end closest to the center of the handheld fire stick) is fixedly connected to the other end of the clamping portion 33. The spring contact portion 341 and the clamping portion 33 are parallel to each other and are located on either side of the contact connection portion 342. The top end of the spring contact portion 341 contacts the negative electrode spring 4. The clamping portion 33 and the spring connection portion 34 are generally Z-shaped.

[0067] The spring contact portion 341 directly contacts the negative spring 4 to ensure that current can be transferred from the negative spring 3 to the spring. The design of the spring contact portion 341 must ensure stable contact with the negative spring 4.

[0068] The outer end of the contact connection portion 342 is fixedly connected to one end of the spring contact portion 341, and the inner end is fixedly connected to the other end of the clamping portion 33. The contact connection portion 342 serves to connect the spring contact portion 341 and the clamping portion 33, and can provide a certain degree of elasticity to accommodate small displacements during assembly.

[0069] The contact connection portion 342 is designed as a flat surface or a curved surface that contacts the negative electrode spring 4 to ensure good electrical connection.

[0070] The contact connection portion 342 is a bridge connecting the spring contact portion 341 and the clamping portion 33 and is designed to be flat or have a certain bending angle to achieve the connection between the spring contact portion 341 and the clamping portion 33 and ensure the overall stability of the spring.

[0071] In one embodiment, the device further includes a contact piece 6; a mounting protrusion 5 is provided within the housing 1; a snap-fitting recess 11 is provided in the middle of the contact piece 6, which snaps into engagement with the mounting protrusion 5; and the bottom end of the contact piece 6 is fixedly connected to the top end of the negative spring 4. Preferably, the contact piece 6 is formed by bending a metal sheet multiple times, with the snap-fitting recess 11 formed in the middle of the metal sheet.

[0072] The contact piece 6 is mainly used to enhance the electrical connection stability between the negative electrode spring 4 and the circuit board 8 or other electrical components, ensuring the reliability and efficiency of current transmission.

[0073] The contact piece 6 is installed inside the housing 1 , with one end of the contact piece being fixedly connected to the other end of the negative pole spring 4 , and the other end of the contact piece being connected to the circuit board 8 or other electrical components.

[0074] A mounting protrusion 5 is provided in the housing 1 , and a snap-fitting recess 11 is designed in the middle of the contact piece 6 , which is adapted to snap fit with the mounting protrusion 5 in the housing 1 to ensure the stability of the contact piece 6 during installation.

[0075] A snap-fit ​​recess 11 is provided in the middle of the contact piece 6 , which matches the mounting protrusion 5 in the housing 1 , so that the contact piece 6 can be firmly fixed in the housing 1 to prevent displacement or loosening during use.

[0076] The contact piece 6 is usually made of a metal material with good electrical conductivity, such as copper, copper alloy or silver-plated metal material, to ensure high efficiency of current transmission.

[0077] The contact piece 6 is formed by bending a metal sheet multiple times, and the bending process forms a snap-fit ​​recess 11 in the middle of the metal sheet. This process is usually completed through a precise stamping or bending process to ensure that the size and shape of each part meet the design requirements.

[0078] The design of the contact piece 6 takes installation convenience into consideration. The contact piece 6 can be quickly and accurately installed in place through the cooperation between the snap-fitting recess 11 and the installation protrusion 5 in the housing 1 .

[0079] The addition of the contact piece 6 not only enhances the electrical connection stability between the negative spring 4 and the circuit board 8, but also improves the reliability of the entire connection structure and reduces the problem of poor connection caused by vibration or external force impact.

[0080] In one embodiment, a positive electrode spring 7 is further included; the positive electrode spring 7 is installed at the end of the battery compartment away from the end cover 2. The main function of the positive electrode spring 7 is to ensure a reliable electrical connection between the positive terminal of the battery and the circuit board 8 or other electrical components, ensuring smooth current transmission.

[0081] The positive electrode spring 7 is installed at the end of the battery compartment away from the end cover 2, that is, the end opposite the negative electrode spring 3. This layout design ensures that when the battery is installed, its positive and negative terminals can contact the positive electrode spring 7 and the negative electrode spring 3 respectively, thereby achieving correct connection between the battery and the circuit.

[0082] The material and processing process of the positive electrode spring piece 7 are basically the same as those of the negative electrode spring piece 3 .

[0083] The design of the positive electrode spring 7 is not limited to a specific shape, but rather emphasizes its practicality and functionality. Specifically, the shape of the positive electrode spring 7 should meet two basic requirements: ease of installation and ability to connect the battery's positive electrode to the circuit board 8. The following is a detailed description of this paragraph:

[0084] The design of the positive electrode spring 7 should take into account the user's convenience of operation. This means that the spring should be easy to install and the user can fix it to the housing 1 or the end cap 2 without complicated tools or skills.

[0085] The design of the spring clip may include some features that facilitate installation, such as snaps, grooves or other forms of fixing structures, so that the user can quickly and accurately install the spring clip in place.

[0086] The main function of the positive electrode spring 7 is to ensure a reliable electrical connection between the positive terminal of the battery and the circuit board 8 or other electrical components, thereby ensuring smooth transmission of current.

[0087] The shape and structure of the spring should ensure good contact with the positive terminal of the battery and be able to effectively transfer current to the circuit board 8 or other electrical components.

[0088] Since the shape of the positive electrode spring 7 is not strictly limited, it can take a variety of forms to suit different application scenarios and design requirements. The following are some possible shape design examples:

[0089] Flat type:

[0090] This is one of the simplest forms. The spring can be designed as a flat metal sheet, which can be bent or cut appropriately to form the required fixing structure. This design is suitable for applications with relatively loose space.

[0091] Folding type:

[0092] The folding design can make the spring have better elasticity. By folding the metal sheet multiple times to form a snap-on structure or other fixing methods, it is suitable for applications that require a certain degree of elasticity and compact space.

[0093] Spring type:

[0094] The spring type design may be in the form of a coil spring, which provides greater elasticity and ensures good electrical contact under different pressure conditions.

[0095] Hook type:

[0096] The hook-type design may be a hook-shaped structure formed at one or both ends of the metal sheet, and these hook-shaped structures cooperate with corresponding structures on the housing 1 or the end cover 2 to achieve the fixation of the spring sheet.

[0097] The shape design of the positive electrode spring 7 can be adjusted according to specific application requirements to meet different functional requirements. For example:

[0098] Space limitation: In space-constrained application environments, it can be designed into a compact or foldable type to save space.

[0099] Connection stability: To improve the stability of the connection, it can be designed into a shape with multiple contact points, or the thickness and hardness of the spring can be increased.

[0100] Ease of installation: To facilitate user installation, the device can be designed with obvious markings or instructions, or use colors to distinguish between positive and negative poles to reduce the possibility of installation errors.

[0101] like Figures 1 to 9 As shown, a handheld fire-picking stick according to an embodiment of the present invention includes a negative electrode connection structure of a battery as described in the above embodiment.

[0102] In addition to the above-mentioned battery negative electrode connection structure, this embodiment also includes the combustion part, auxiliary ignition device and other structures in the prior art CN111023146A, which will not be repeated here.

[0103] In one embodiment, it includes a circuit board 8 and a grounding spring 9; the top of the negative spring 4 is connected to the negative connection point of the circuit board 8; one end of the grounding spring 9 is connected to the circuit board 8, and the other end is connected to the housing 1.

[0104] Circuit board 8 is the core control component of the handheld fire stick, responsible for receiving power from the battery and controlling the discharge behavior of the ignition pin through its built-in circuit design. Circuit board 8 has a dedicated negative terminal connection point for connecting to the other end of the negative spring 4, thereby electrically connecting the negative terminal of the battery to circuit board 8.

[0105] The grounding spring 9 is mainly used to electrically connect the circuit board 8 to the housing 1 , which is equivalent to grounding the circuit board 8 to improve the safety of the system.

[0106] One end of the grounding spring 9 is connected to a specific connection point on the circuit board 8, ensuring a good electrical connection between the circuit board 8 and the grounding spring 9. The other end of the grounding spring 9 is connected to the outer shell 1 of the fire rod. In this way, the electrical signal on the circuit board 8 is directed to the outer shell 1 to achieve the purpose of grounding.

[0107] The connection between the ground spring 9 and the circuit board 8 is usually achieved by welding or crimping to ensure the stability and reliability of the connection.

[0108] The design of grounding spring 9 ensures that any abnormal current on circuit board 8 can be discharged through housing 1, thereby reducing the risk of damage to circuit board 8 due to overload or short circuit, and improving system safety. The electrical connection between circuit board 8 and housing 1 via grounding spring 9 effectively reduces the impact of static electricity on circuit board 8 and improves the reliability of device operation.

[0109] The negative electrode spring 4 and the ground spring 9 are usually made of materials with good electrical conductivity and elasticity, such as phosphor bronze or stainless steel, to ensure that they can maintain good elasticity and electrical conductivity during repeated use.

[0110] The circuit board 8 has good electrical insulation performance and mechanical strength, and is suitable for high-frequency circuit applications.

[0111] In one embodiment, the grounding spring 9 is connected to the negative spring 3 or the negative spring 4. Since both the negative spring 3 and the negative spring 4 are connected to the housing 1, the indirect connection between the grounding spring 9 and the housing 1 achieves double grounding.

[0112] The other end of the grounding spring 9 is connected to the negative spring 3 or the negative spring 4 by a fixed manner to ensure a good electrical connection between the two. The grounding spring 9 can be connected to either the negative spring 3 or the negative spring 4, and the best solution is selected according to the actual situation.

[0113] Through the double grounding design, even if one of the grounding connections has a problem, the other connection can still ensure the electrical connection between the circuit board 8 and the housing 1, thereby improving the safety and stability of the system.

[0114] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on the specific circumstances.

[0115] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0116] Throughout this specification, terms such as "one embodiment" and "a preferred embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0117] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A negative electrode connection structure of a battery, characterized in that: It includes a housing (1), an end cover (2), a negative electrode spring (3) and a negative electrode spring (4): A battery compartment is provided in the housing (1); The bottom end of the housing (1) is open and communicates with the battery compartment; The negative pole spring (4) is arranged in the housing (1), the bottom end of the negative pole spring (4) is close to the bottom end of the housing (1), and the top end of the negative pole spring (4) is connected to the housing (1); The negative electrode spring (3) is arranged on the inner side of the end cover (2); When the end cover (2) is buckled onto the bottom end of the housing (1), the negative electrode spring (3) contacts the negative electrode of the battery located in the battery compartment and the negative electrode spring (4).

2. The negative electrode connection structure of a battery according to claim 1, characterized in that: A clamping groove (10) is provided on the inner side of the end cover (2), and the negative electrode spring (3) is clamped in the clamping groove (10).

3. The negative electrode connection structure of a battery according to claim 1, characterized in that: The negative electrode spring (3) comprises a battery connecting portion (31), a connecting portion (32), a clamping portion (33) and a spring connecting portion (34); The battery connecting portion (31) is arranged above the clamping portion (33); One end of the battery connecting portion (31) is fixedly connected to one end of the clamping portion (33) via the connecting portion (32); The other end of the clamping portion (33) is connected to the spring connecting portion (34).

4. The negative electrode connection structure of a battery according to claim 3, characterized in that: The spring connecting portion (34) includes a spring contact portion (341) and a contact connecting portion (342); The outer end of the contact connection portion (342) is fixedly connected to the bottom end of the spring contact portion (341), and the inner end is fixedly connected to the other end of the clamping portion (33); The spring contact portion (341) and the clamping portion (33) are parallel to each other and are respectively located on both sides of the contact connection portion (342); The top end of the spring contact portion (341) contacts the negative electrode spring (4).

5. The negative electrode connection structure of a battery according to claim 1, characterized in that: Also includes a contact piece (6); A mounting protrusion (5) is provided in the housing (1); A snap-fitting recess (11) is provided in the middle of the contact piece (6), and the snap-fitting recess (11) is adapted to snap-fit ​​with the mounting protrusion (5); The bottom end of the contact piece (6) is fixedly connected to the top end of the negative pole spring (4).

6. The negative electrode connection structure of a battery according to claim 5, characterized in that: The contact sheet (6) is formed by bending a metal sheet multiple times, and the clamping recess (11) is formed in the middle of the metal sheet.

7. The negative electrode connection structure of a battery according to claim 1, characterized in that: Also includes a positive electrode spring (7); The positive electrode spring (7) is installed at one end of the battery compartment away from the end cover (2).

8. A handheld fire stick, characterized in that: A negative electrode connection structure of a battery comprising the structure described in any one of claims 1 to 7.

9. A handheld fire stick according to claim 8, characterized in that: It includes a circuit board (8) and a ground spring (9); The top end of the negative electrode spring (4) is connected to the negative electrode connection point of the circuit board (8); One end of the grounding spring (9) is connected to the circuit board (8), and the other end is connected to the housing (1).

10. A handheld fire stick according to claim 9, characterized in that: The grounding spring (9) is connected to the negative pole spring (3) or the negative pole spring (4).

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