An error-proof structure for charging electric surfboards

Abstract

This utility model relates to electric surfboards, and more particularly to a charging error prevention structure for electric surfboards. Existing electric surfboards are prone to incorrect charger connection, leading to electrical safety hazards. Therefore, this utility model provides a charging error prevention structure for electric surfboards, including a charger and a battery. The charger's interface end has two outwardly protruding power terminals, and the battery's interface end has two terminal holes that mate with the power terminals. Between the charger's interface end and the battery's interface end, there are mating protrusions and recesses forming an error prevention structure to prevent the charger from being connected to the wrong battery. When the protrusions and recesses mate, the power terminals and terminal holes are connected. This utility model, by providing mating protrusions and recesses between the charging interfaces of the charger and battery, ensures that charging can only proceed when the protrusions and recesses are correctly matched, thus forming an error prevention structure to avoid the charging error and the resulting charging safety hazards.

Description

Technical Field

[0001] This utility model relates to electric surfboards, and in particular to a fault-prevention structure for charging electric surfboards. Background Technology

[0002] Electric surfboards power their water jet propulsion system via built-in batteries. These batteries are categorized into high-voltage and low-voltage types, each requiring a different charger. Using the wrong charger can easily cause a fire. However, the charging interfaces for these two types of batteries and their corresponding chargers often share the same structure, lacking any anti-misoperation design. This makes it easy to confuse them during use, posing a serious charging safety hazard. Utility Model Content

[0003] To address the technical problem of potential electrical safety hazards caused by the misuse of chargers for existing electric surfboards, this utility model provides a charging error prevention structure for electric surfboards. This structure can effectively prevent the incorrect pairing of high-voltage and low-voltage batteries with chargers. During use, the high-voltage charger can only be plugged into a matching high-voltage battery for charging, and the low-voltage charger can only be plugged into a matching low-voltage battery for charging.

[0004] The technical solution adopted by this utility model to solve the technical problem is as follows: an anti-misconnection structure for charging an electric surfboard, including a charger and a battery that can be connected for charging. The charger's interface end has two outwardly protruding power terminals, and the battery's interface end has two terminal holes that are matched with the power terminals. The key feature is that there are matching protrusions and recesses between the charger's interface end and the battery's interface end, forming an anti-misconnection structure to prevent the charger from connecting the wrong battery. When the protrusions and recesses are properly matched, the power terminals and terminal holes are connected. This utility model, by providing matching protrusions and recesses between the interfaces of the charger and battery, forms an anti-misconnection structure to avoid the charger connecting the wrong battery and the resulting charging safety hazards. Only when the protrusions and recesses are correctly matched can the power terminals on the charger side and the terminal holes on the battery side be connected. The protrusions and recesses also help to position the connection between the charger and the battery.

[0005] As a further improvement and supplement to the above technical solution, this utility model adopts the following technical measures: the protrusion is a positioning post parallel to the power terminal, and the recess is a positioning channel matching the positioning post, with the positioning post and positioning channel respectively located on the charger side and the battery side. When the positioning post and positioning channel are fully engaged, the power terminal is simultaneously engaged with the terminal hole. The protruding positioning post is located on the charger side to avoid affecting the battery's installation inside the electric surfboard due to its protrusion on the battery side; the positioning channel is on the battery side, and the channel can extend inwards towards the battery without affecting the battery's installation inside the electric surfboard.

[0006] The error-proof structure can be adjusted by changing at least one of the outer diameter, number, and position of the positioning posts. The adjustment of the error-proof structure can be achieved by changing at least one of the three: the outer diameter, number, and position of the positioning posts. Specifically, the change can be any one of the three, a combination of two changes, or a combination of all three changes. This allows the positioning structure to be flexibly adjusted as needed to meet the requirements of surfboard batteries and chargers of various specifications and shapes.

[0007] At least one positioning post is located on the side of the power terminal, and the battery interface end has positioning holes that match each positioning post. The charger forms a misalignment prevention structure by matching multiple positioning posts on the side of the power terminal with the positioning holes on the side of the battery charging end. Only when the positioning posts and corresponding positioning holes match can the power terminal of the charger be aligned and plugged into the terminal hole of the battery charging end. Incompatible chargers and battery charging ends cannot be connected, thus avoiding charging safety hazards caused by connecting chargers and batteries with different voltage specifications.

[0008] There are three positioning posts: a first positioning post and a second positioning post located outside the two power terminals, and a third positioning post located between the two power terminals. These three positioning posts, located outside and between the two power terminals, serve as a mis-connection structure to prevent the charger from connecting the wrong battery, while also positioning the battery and charger connections.

[0009] The axes of the power terminals and positioning posts are located on the same plane. By confining the axes of the two power terminals and all positioning posts to the same plane, the power terminals and positioning posts are arranged along a straight line, facilitating the installation of positioning posts in the empty spaces on the sides of the power terminals, resulting in a compact structure and saving space. When the positioning posts and power terminals are not distributed on a straight line, a complex interlacing relationship is formed, increasing the space requirements and making the overall structure less compact.

[0010] The positioning post is cylindrical with an arc-shaped top. The positioning channel is either a circular hole or an oblong hole, the radius of which matches the radius of the positioning post. The cylindrical positioning post, with matching radii, can be inserted into the corresponding circular or oblong hole. The arc-shaped top of the positioning post allows it to be inserted into the positioning channel even if the end is not perfectly aligned with the positioning hole. The oblong hole offers better compatibility than the circular hole, accommodating the matching cylinder even with positional deviations.

[0011] The top of the positioning post is lower than the top of the power terminal block. Setting the top of the positioning post to be lower than the top of the power terminal block effectively prevents the positioning post from being damaged by accidental collisions during routine handling of the charger, thus avoiding failure of the error-proofing structure.

[0012] The positioning post is inserted and fixed in the mounting hole provided at the charger interface end. The mounting hole includes an outer large-diameter hole and an inner small-diameter hole. The connection between the large-diameter hole and the small-diameter hole changes diameter to form a second outward-facing annular surface. The positioning post is composed of a large-diameter section and a small-diameter section connected in an integral structure. The connection between the large-diameter section and the small-diameter section changes diameter to form a second annular surface. When the positioning post is inserted and fixed to the mounting hole, the small-diameter section and the small-diameter hole fit tightly, while the large-diameter section and the large-diameter hole have a clearance fit. The positioning post has two sections with different outer diameters. Similarly, the mounting hole also has two sections of different sizes. During installation, the thinner section of the positioning post passes through the large-diameter hole and is inserted into the small-diameter hole for fastening. The thicker section of the positioning post has a clearance fit with the large-diameter hole to ensure that the thinner section can pass smoothly through the large-diameter hole. The contact between the first annular surface and the second annular surface can limit the overlap length of the positioning post and the mounting hole, thereby allowing the positioning post to have a suitable extension length and fit with the positioning hole.

[0013] The first annular surface has a rounded chamfer at the inner ring. The purpose of the rounded chamfer is to remove burrs generated during machining at the diameter change point, improve the assembly performance of the positioning post and the mounting hole, reduce stress concentration caused by sudden diameter change, enhance the strength of the component, and also improve the appearance.

[0014] The beneficial technical effects of this utility model are as follows: By setting matching protrusions and recesses between the interfaces of the charger and the battery, a mis-connection prevention structure is formed, avoiding incorrect connection of the charger and battery and the resulting charging safety hazards. Only when the protrusions and recesses are correctly matched can the power terminal on the charger side be successfully inserted into the terminal hole on the battery side. The protrusions and recesses are preferably simple and easy-to-process positioning posts and positioning channels. The combination of positioning posts and positioning channels can not only prevent the battery from being connected to the wrong charger, but also position the connection between the charger and the battery. The specific mis-connection prevention structure can be flexibly adjusted by changing the outer diameter, number and distribution position of the positioning posts to meet the needs of surfboard batteries and chargers of different specifications and shapes. The positioning posts and power terminals are distributed along the same straight line, resulting in a compact structure and small footprint. Attached Figure Description

[0015] Figure 1 : Structural diagram of Example 1.

[0016] Figure 2 : Figure 1 A sectional view along line AA.

[0017] Figure 3 : Figure 1 BB-direction sectional view.

[0018] Figure 4 : Structural schematic diagram of Example 2.

[0019] Figure 5 : Figure 4 CC-direction sectional view.

[0020] Figure 6 : Figure 4 DD section view.

[0021] Figure 7 Example 3: Structural diagram.

[0022] Figure 8 : Figure 7 EE-directed sectional view.

[0023] Figure 9 : Figure 7 FF section view.

[0024] In the diagram: 1. Charger interface, 2. Battery interface, 3. Power terminal, 4. Terminal hole, 5. Positioning post, 5-1. Large diameter section, 5-2. Small diameter section, 5-3. First annular surface, 6. Positioning channel, 6-1. Round hole, 6-2. Oval hole, 7. Mounting channel, 7-1. Large diameter channel, 7-2. Small diameter channel. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-3 As shown, Embodiment 1 is a charging error prevention structure for an electric surfboard, including a charger and a battery that can be connected for charging. The charger's interface end has two outwardly protruding power terminals 3. In this embodiment, the charger's interface end is represented by the charger interface part 1. The battery's interface end has two terminal holes that match the power terminals 3. Similarly, in this embodiment, the battery's interface end is represented by the battery interface part 2. Between the charger interface part 1 and the battery interface part 2, there are protrusions and recesses that can be mated to form an error prevention structure to prevent the charger from connecting the wrong battery. When the protrusions and recesses are mated, the power terminals 3 and the terminal holes 4 are connected. The protrusion is a positioning post 5 on the charger interface part 1 that is parallel to the power terminals 3, and the recess is a positioning channel 6 on the battery interface part 2 that matches the positioning post 5. The error prevention structure can be adjusted and changed by changing at least one of the three factors: the outer diameter, the number, and the position of the positioning posts 5, to achieve different error prevention structures.

[0027] This embodiment forms a mis-connection structure by incorporating matching positioning posts and positioning holes between the interface sections of the charger and battery. This prevents the charger from being connected to the wrong battery and avoids potential charging safety hazards. Only when the charger and battery are correctly matched can the positioning posts and positioning holes successfully align, allowing the power terminal to connect and charge the battery. The fit between the positioning posts and positioning holes also helps to secure the charger and battery connection. The mis-connection structure can be flexibly modified by changing the outer diameter, number, and position of the positioning posts to ensure correct matching between the charger and battery. These modifications can be made to one, two, or all three of the positioning posts.

[0028] Furthermore, at least one positioning post 5 is located on the side of the power terminal 3. In this embodiment, it is preferable to have two positioning posts 5, as shown in the figure, located on the outer sides of the two power terminals 3. Moreover, the axes of the two power terminals 3 and the two positioning posts 5 are all on the same vertical plane, that is, the axes of the power terminals and the axes of the positioning posts are distributed along a straight line. The battery interface part 2 is provided with positioning channels 6 that match the two positioning posts 5. Both positioning posts 5 are cylinders with arc-shaped tops. The two positioning channels can be circular holes 6-1 or oblong holes. The radii of the circular holes 6-1 or oblong holes match the radii of the positioning posts 5, so that the positioning posts can be inserted into the positioning holes. In this embodiment, it is preferable that the positioning channel 6 is a circular hole 6-1.

[0029] The top of the positioning post 5 is lower than the top of the power terminal post 3. The positioning post 5 is inserted and fixed in the mounting channel 7 provided at the charger interface end. The mounting channel 7 includes an outer large-diameter channel 7-1 and an inner small-diameter channel 7-2 connected together. The connection between the large-diameter channel 7-1 and the small-diameter channel 7-2 changes diameter to form a second outward-facing annular surface 7-3. The positioning post 5 is composed of a large-diameter section 5-1 and a small-diameter section 5-2 connected in an integral structure. The connection between the large-diameter section 5-1 and the small-diameter section 5-2 changes diameter to form a first annular surface 5-3. When the positioning post 5 is inserted and fixed in the mounting hole, the small-diameter section 5-2 and the small-diameter channel 7-2 are tightly fitted, while the large-diameter section 5-1 and the large-diameter channel 7-1 are loosely fitted. The first annular surface 5-3 and the second annular surface 7-3 respectively form arc-shaped chamfers at their respective inner rings.

[0030] like Figures 4-6 As shown, Embodiment 2 is also a fault-prevention structure for charging electric surfboards. The difference between Embodiment 2 and Embodiment 1 is that the positioning hole 6 adopts an oblong hole 6-2. The rest is the same as Embodiment 1. It is also a fault-prevention structure composed of positioning posts and positioning holes to avoid the charger connecting the wrong battery and the resulting charging safety hazards.

[0031] like Figures 7-9As shown, Embodiment 3 is also a charging error prevention structure for electric surfboards. The difference from Embodiment 1 is that there are three positioning posts 5. The three positioning posts 5 are the first positioning post, the second positioning post, and the third positioning post located between the two power terminals 3. The positioning channel 6 also adopts the waist-shaped hole 6-2. The rest is the same as Embodiment 1. It is also an error prevention structure composed of positioning posts and positioning channels to avoid the charger connecting the wrong battery and the resulting charging safety hazards.

Claims

1. A fault-prevention structure for charging an electric surfboard, comprising a charger and a battery, wherein the charger's interface end has two outwardly extending power terminals (3), and the battery's interface end has two terminal holes that are matched for insertion into the power terminals (3), characterized in that... The interface end of the charger and the interface end of the battery are provided with protrusions and recesses that can be matched to form an anti-misconnection structure to prevent the charger from connecting the wrong battery. When the protrusions and recesses are matched, the power terminal (3) and the terminal hole (4) are connected.

2. The electric surfboard charging error prevention structure according to claim 1, characterized in that: The protrusion is a positioning post (5) parallel to the power terminal (3), and the recess is a positioning channel (6) matching the positioning post (5). The positioning post (5) and the positioning channel (6) are respectively located on the charger side and the battery side.

3. The electric surfboard charging error prevention structure according to claim 2, characterized in that: The error prevention structure can be changed by adjusting at least one of the outer diameter, number, and position of the positioning post (5).

4. The electric surfboard charging error prevention structure according to claim 2, characterized in that: At least one of the positioning posts (5) is located on the side of the power terminal (3), and the interface end of the battery is provided with positioning holes (6) that match each positioning post (5).

5. The electric surfboard charging error prevention structure according to claim 4, characterized in that: There are three positioning posts (5): the first positioning post and the second positioning post located outside the two power terminals (3), and the third positioning post located between the two power terminals (3).

6. The electric surfboard charging error prevention structure according to claim 2, characterized in that: The axes of the power terminal (3) and the positioning terminal (5) are located on the same plane.

7. The electric surfboard charging error prevention structure according to claim 2, characterized in that: The positioning post (5) is a cylinder with an arc-shaped top. The positioning hole (6) is a round hole (6-1) or a waist-shaped hole (6-2). The radius of the round hole (6-1) or the waist-shaped hole (6-2) matches the radius of the positioning post (5).

8. The electric surfboard charging error prevention structure according to claim 2, characterized in that: The top of the positioning post (5) is lower than the top of the power supply terminal (3).

9. The electric surfboard charging error prevention structure according to claim 2, characterized in that: The positioning post (5) is inserted and fixed in the mounting hole (7) provided at the charger interface end. The mounting hole (7) includes an outer large-diameter hole (7-1) and an inner small-diameter hole (7-2). The connection between the large-diameter hole (7-1) and the small-diameter hole (7-2) changes diameter to form a second annular surface facing outward. The positioning post (5) is composed of a large-diameter section (5-1) and a small-diameter section (5-2) connected in an integral structure. The connection between the large-diameter section (5-1) and the small-diameter section (5-2) changes diameter to form a first annular surface (5-3). When the positioning post (5) is inserted and fixed to the mounting hole, the small-diameter section (5-2) and the small-diameter hole (7-2) fit tightly, while the large-diameter section (5-1) and the large-diameter hole (7-1) fit loosely.

10. The electric surfboard charging error prevention structure according to claim 9, characterized in that: The first annular surface (5-3) has a rounded chamfer at the inner ring.

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