Mobile power supply with line

Abstract

The utility model embodiment provides a kind of self line portable power source, comprising: equipment main body;Flexible data line, including telescopic connecting line and the electrical connector of the one end electrical connection of telescopic connecting line, the other end of telescopic connecting line is telescopically arranged in the equipment main body;Accommodation piece is connected with the equipment main body, and the accommodation piece includes accommodation piece main body and connecting piece, and the both ends of connecting piece are respectively connected with the accommodation piece main body, the equipment main body, and accommodation is equipped on the accommodation piece main body Accommodation part, and the electrical connector is detachably connected in the accommodation part;When the electrical connector is connected to the accommodation part, the telescopic connecting line and the accommodation piece form suspension structure.This embodiment by accommodating the electrical connector into accommodation part, effectively reduce the dust pollution of electrical connector.

Description

Technical Field

[0001] This utility model relates to the field of electronic device accessories technology, and in particular to a portable power bank with a built-in cable. Background Technology

[0002] With the widespread use of portable power banks, many portable power banks on the market have adopted a design that fixes the data cable to the main body to improve ease of use. This integrated structure saves users the trouble of carrying an extra data cable, making charging more convenient and efficient, and is very popular among consumers.

[0003] However, when storing power banks with built-in data cables, the electrical connectors are often directly exposed without protection. Exposed connectors not only detract from the overall aesthetics of the power bank but also easily accumulate dust, affecting contact during use and potentially causing damage from friction and impact, thus shortening its lifespan. Utility Model Content

[0004] Therefore, in order to overcome at least some of the defects and deficiencies in the prior art, this utility model provides a self-contained power bank with an effective protective measure for the electrical connector.

[0005] Specifically, this utility model provides a self-contained power bank, comprising: a device body; a retractable data cable, including a retractable connecting wire and an electrical connector electrically connected to one end of the retractable connecting wire, the other end of the retractable connecting wire being retractably disposed within the device body; and a storage component connected to the device body, the storage component including a storage component body and a connector, the two ends of the connector being respectively connected to the storage component body and the device body, the storage component body having a storage portion, and the electrical connector being detachably connected to the storage portion; when the electrical connector is connected to the storage portion, the retractable connecting wire and the storage component form a suspension structure.

[0006] In an embodiment of this utility model, the telescopic connecting line includes an internal section and an external extension section, the external extension section being disposed between the internal section and the electrical connector; when the telescopic connecting line is in its maximum retracted state, the internal section is located inside the device body, the external extension section is exposed outside the device body, and the external extension section, together with the storage component body and the connector, forms the suspension structure.

[0007] In an embodiment of this utility model, the main body of the storage component is provided with a wire hole, and the telescopic connecting wire is slidably passed through the wire hole; wherein, the extension section passes through the wire hole and is connected to the electrical connector, and when the electrical connector is connected to the storage part, the extension section and the main body of the storage component enclose a hook space.

[0008] In an embodiment of this utility model, the telescopic connecting line includes an inner section and an outer extension section. The main body of the storage component is provided with a wire hole, and the outer extension section is slidably inserted into the wire hole. The outer extension section, the connecting component, and the main body of the storage component form a handle space.

[0009] In an embodiment of this utility model, a first limiting part is provided on the telescopic connecting line. The first limiting part is located at the portion of the outer extension that passes through the wire hole, and the first limiting part is spaced apart from the electrical connector.

[0010] In an embodiment of this utility model, the main body of the storage component is provided with a wire hole, and the telescopic connecting wire is slidably passed through the wire hole; the storage part is provided with a receiving groove extending into the main body of the storage component, and the opening of the wire hole, the receiving groove, and the connecting member are arranged sequentially at intervals along the circumference of the main body of the storage component.

[0011] In an embodiment of this utility model, the electrical connector includes a connector body and a connecting terminal connected to the connector body. The telescopic connecting line is located at one end of the connector body along its length, and the connecting terminal extends in a direction perpendicular to the length of the connector body.

[0012] In an embodiment of this utility model, the receiving groove is provided with a first sub-receiving groove and a second sub-receiving groove. The second sub-receiving groove is located at the bottom of the first sub-receiving groove, and the opening size of the second sub-receiving groove is smaller than the bottom size of the first sub-receiving groove to form a stepped structure.

[0013] In an embodiment of this utility model, the inner wall of the first sub-accommodating groove is provided with a second limiting part, and the side wall of the connector body is provided with a third limiting part that matches the second limiting part. The second limiting part and the third limiting part are engaged and fixed.

[0014] In an embodiment of this utility model, the connector body includes a face cover, which is located on the side of the connector body away from the connecting terminal. A first joint is provided at the connection between the face cover and the connector body. The groove of the receiving groove is provided with a second joint that matches the first joint. When the electrical connector is stored in the receiving groove, the first joint and the second joint are matched and connected.

[0015] In an embodiment of this utility model, the first joint is provided with a first arc-shaped surface, and the second joint is provided with a second arc-shaped surface that matches the first arc-shaped surface. When the electrical connector is housed in the receiving groove, the first arc-shaped surface and the second arc-shaped surface fit together; or, the size of the second joint gradually decreases along the direction from the opening of the receiving groove toward the bottom of the groove.

[0016] As can be seen from the above, the technical features of this utility model can have one or more of the following beneficial effects: By providing a storage section on the storage component, the electrical connector is stored inside the storage section, effectively reducing dust contamination of the electrical connector, preventing dust from entering the interface gaps and affecting the contact effect, and ensuring the stability of charging or data transmission. At the same time, storing the electrical connector in the storage slot prevents it from being exposed, making the overall appearance of the power bank cleaner and more uniform, improving the product's aesthetics. Furthermore, the storage section provides physical protection for the electrical connector, reducing the probability of friction and collision with other items during carrying or storage, lowering the risk of wear on the connector shell and deformation of the interface, thereby extending the service life of the electrical connector and even the entire data cable. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0018] Figure 1 A schematic diagram of the retractable data cable storage state of a power bank with a built-in cable provided in an embodiment of this utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the retractable data cable of a portable power bank with a built-in cable in the open state;

[0020] Figure 3 for Figure 2 A cross-sectional view of a mobile power bank with a built-in cable.

[0021] Figure 4 for Figure 3 A cross-sectional view of the structure without the telescopic connecting line;

[0022] Figure 5 for Figure 2 Another structural diagram of a mobile power supply with built-in cable;

[0023] Figure 6 for Figure 5 A magnified view of a portion of region A in the middle;

[0024] Figure 7 for Figure 2 Another structural diagram of a mobile power supply with built-in cable;

[0025] Figure 8 for Figure 7 A magnified view of a portion of region B in the middle;

[0026] Figure 9 for Figure 2 Another structural diagram of a mobile power supply with built-in cable;

[0027] Figure 10 for Figure 9 A magnified view of a portion of region C in the middle.

[0028] [Explanation of Key Figure Markings]

[0029] 1: Power bank with built-in cable; 10: Main body of the device; 101: Telescopic cable module; 20: Telescopic data cable; 201: Telescopic connecting cable; 2011: Outer extension section; 2012: First limiting part; 202: Electrical connector; 2021: Connector body; 20210: Third limiting part; 20211: Face cover; 2023: First joint part; 2024: Connecting terminal; 30: Storage component; 31: Storage component body; 310: Receiving groove; 3101: First sub-receiving groove; 3102: Second sub-receiving groove; 3103: Second limiting part; 3104: Second joint part; 312: Cable hole; 313: Connector; 40: Hook space; 41: Handle space. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments described in this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, top, and bottom) in this embodiment of the invention are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly. Furthermore, the term "vertical" in the embodiments and claims refers to an angle of 90° between two components or a deviation of -5° to +5°, and the term "parallel" refers to an angle of 0° between two components or a deviation of -5° to +5°.

[0032] In this embodiment of the invention, the use of terms such as "first" and "second" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0033] Reference Figure 1 and Figure 2 As shown in the figure, an embodiment of the present invention provides a self-contained power bank 1, comprising: a device body 10, a retractable data cable 20, and a storage component 30. The retractable data cable 20 includes a retractable connecting cable 201 and an electrical connector 202 electrically connected to one end of the retractable connecting cable 201. The other end of the retractable connecting cable 201 is retractably disposed within the device body 10. The storage component 30 is connected to the device body 10 and includes a storage component body 31 and a connector 313. Both ends of the connector 313 are respectively connected to the storage component body 31 and the device body 10. The storage component body 31 has a storage portion, and the electrical connector 202 is detachably connected to the storage portion. When the electrical connector 202 is connected to the storage portion, the retractable connecting cable 201 and the storage component 30 form a suspension structure.

[0034] Specifically, the retractable data cable 20 can be extended to extend the retractable connecting cable 201 as needed, making operation simple and convenient. The outlet of the retractable data cable 20 can be located, for example, at one corner of the device body 10. When the electrical connector 202 is retracted into the storage section, the retractable data cable 20 and the storage body 31 form a suspension structure. The storage section can be, for example, located circumferentially on the storage body 31 and adjacent to the outlet of the retractable data cable 20. The electrical connector 202 can be, for example, any of Type-C, Lightning, or Micro USB, and the storage section corresponds to the type of electrical connector 202.

[0035] A storage section is provided on the storage component 30, allowing the electrical connector 202 to be stored within it. This effectively prevents it from being exposed when not in use, reducing contamination of the connector 202 by dust, dirt, and other impurities. This lowers the probability of poor contact due to impurities and ensures the stability of the retractable data cable 20 during charging or data transmission. The electrical connector 202 is passed through an object similar to a backpack strap and snapped into the storage section, forming a suspension structure between the retractable connecting cable 201 and the storage component 30, which is then suspended from the backpack strap. Using the electrical connector 202 and the storage section to achieve the suspension structure simplifies the product structure and reduces costs. Furthermore, the elasticity or length adjustment capability of the retractable connecting cable 201 allows it to adapt to backpack straps of different thicknesses and other suspended objects, enhancing the design's versatility.

[0036] Reference Figure 1 , Figure 2 and Figure 3As shown in the embodiment of this utility model, the telescopic connecting cable 201 includes an internal section and an external extension section 2011, with the external extension section 2011 disposed between the internal section and the electrical connector 202. When the telescopic connecting cable 201 is in its maximum retracted state, the internal section is located inside the device body 10, and the external extension section 2011 protrudes outside the device body 10. The external extension section 2011, together with the storage component body 31 and the connector 313, forms the suspension structure.

[0037] Specifically, the main body 10 of the device is equipped with a telescopic cable module 101, and the telescopic data cable 20 is located inside the telescopic cable module 101. The telescopic cable module 101 regulates the storage path of the telescopic connecting cable 201 through its internal structure, avoiding tangling, compression, or excessive bending of the cable, making the retraction of the telescopic connecting cable 201 smoother. It should be noted that the maximum retracted state of the telescopic connecting cable 201 is when the telescopic connecting cable 201 is retracted to its maximum limit position and cannot retract further. The extended section 2011 serves as both the exposed part of the telescopic connecting cable 201 and, together with the storage component 31 and the connector 313, forms a suspension structure. This eliminates the need for an additional independent suspension component, reducing the number of parts, simplifying the overall structure, and lowering production and assembly costs. The exposed extended section 2011 ensures that the telescopic connecting cable 201, even in the retracted state, can still form a complete suspension loop with the storage component 30. The design of the extension section 2011 allows users to quickly locate the electrical connector 202 and pull it out of the telescopic connecting cable 201 from the telescopic cable module 101, effectively shortening the operation time.

[0038] Reference Figure 1 and Figure 4 As shown in the embodiment of this utility model, the main body 31 of the storage component is provided with a wire hole 312, and the telescopic connecting wire 201 is slidably passed through the wire hole 312. The outer extension 2011 passes through the wire hole 312 and connects to the electrical connector 202. When the electrical connector 202 is connected to the storage part, the outer extension 2011 and the main body 31 of the storage component form a hook space 40. The telescopic connecting wire 201 slides through the wire hole 312, which limits and guides the telescopic connecting wire 201, preventing deviation or shaking of the connecting wire when it is stretched or contracted, thus making operation smoother. In use, the electrical connector 202 is passed through an object such as a backpack strap and stored in the storage part, so that the backpack strap is located within the hook space 40, thereby achieving the suspension of the device body 10 and the backpack strap. It balances practicality, durability, and adaptability to different scenarios, improving user convenience.

[0039] Reference Figure 1 , Figure 2 and Figure 3As shown in the embodiment of this utility model, the telescopic connecting cable 201 includes an inner section and an outer extension section 2011. The storage body 31 is provided with a cable passage hole 312, and the outer extension section 2011 is slidably inserted into the cable passage hole 312. The outer extension section 2011, the connector 313, and the storage body 31 form a handle space 41. When the user pulls the telescopic connecting cable 201 outward for use, the handle space 41 is formed between the storage body 31, the connector 313, and the outer extension section 2011 of the telescopic connecting cable 201. The user can carry the device body 10 at any time without having to hold it or find a place to put it, which is suitable for scenarios where the device is used while charging, improving operational flexibility.

[0040] Reference Figure 1 , Figure 2 and Figure 3 As shown in the embodiment of this utility model, the telescopic connecting line 201 is provided with a first limiting part 2012. The first limiting part 2012 is located at the portion of the outer extension 2011 that passes through the wire hole 312, and the first limiting part 2012 is spaced apart from the electrical connector 202. When the self-contained power bank 1 is in a suspended state, the first limiting part 2012 abuts against the wire hole 312 for limitation. When the first limiting part 2012 contacts the main body 31 of the storage component, it can limit the telescopic connecting line 201 from continuing to retract, thereby reserving a connecting line of a preset length for the hook space 40. This avoids the problem that the hook space 40 is too small and cannot accommodate hanging items such as backpack straps due to excessive retraction of the telescopic connecting line 201, ensuring that the hook space 40 is always kept within a stable usable size range and improving the reliability of the hook function.

[0041] Reference Figure 2 , Figure 3 and Figure 4 As shown in the embodiment of this utility model, the main body 31 of the storage component is provided with a wire hole 312, and the telescopic connecting cable 201 is slidably inserted into the wire hole 312. The storage part is provided with a receiving groove 310 extending into the main body 31 of the storage component. The opening of the wire hole 312, the receiving groove 310, and the connector 313 are arranged sequentially at intervals along the circumference of the main body 31 of the storage component. The telescopic connecting cable 201 can be slidably inserted into the wire hole, which not only ensures the flexibility of telescopic extension, but also limits the cable through the hole structure, reduces the shaking and deviation during pulling, and improves the connection stability. The receiving groove 310 extends vertically into the main body, and the wire hole 312 is built into the main body. The circumferentially spaced arrangement of the two can make full use of the internal depth and circumferential space of the main body 31 of the storage component, and achieve multi-functional integration without increasing the outer diameter of the main body, making the overall structure lighter and more compact, and saving installation or carrying space.

[0042] Reference Figure 5 , Figure 6 and Figure 10 As shown in the embodiment of this utility model, the electrical connector 202 includes a connector body 2021 and a connecting terminal 2024 connected to the connector body 2021. The telescopic connecting line 201 is located at one end of the connector body 2021 along its length, and the connecting terminal 2024 extends perpendicular to the length of the connector body 2021. The extension direction of the connecting terminal 2024 is perpendicular to the length of the connector body 2021, so that the insertion direction of the electrical connector 202 when it is stored in the receiving groove 310 forms an angle with the suspension direction of the device body 10, thus preventing the electrical connector 202 from easily falling off when stored.

[0043] Reference Figure 5 , Figure 6 and Figure 10 As shown, in one embodiment of this example, the receiving groove 310 is provided with a first sub-receiving groove 3101 and a second sub-receiving groove 3102. The second sub-receiving groove 3102 is located at the bottom of the first sub-receiving groove 3101, and the opening size of the second sub-receiving groove 3102 is smaller than the bottom size of the first sub-receiving groove 3101 to form a stepped structure. The receiving groove 310 provides a first sub-receiving groove 3101 for receiving the connector body 2021 and a second sub-receiving groove 3102 for receiving the connecting terminal 2024. The first sub-receiving groove 3101 and the second sub-receiving groove 3102 respectively match the connector body 2021 and the connecting terminal 2024. This allows the various parts of the electrical connector 202 to fit more tightly with the matched receiving groove 310, preventing the electrical connector 202 from shaking or falling off during carrying or movement, improving the stability of storage, and making it less prone to loosening. The first sub-receiving groove 3101 and the second sub-receiving groove 3102 form a stepped structure, which can effectively prevent the electrical connector 202 from sliding axially or rotating radially within the receiving groove 310. Even if the equipment is shaken or collided, the electrical connector 202 can remain firmly in the storage position and avoid falling off.

[0044] Reference Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, in an embodiment of this utility model, the inner wall of the first sub-accommodating groove 3101 is provided with a second limiting part 3103, and the side wall of the connector body 2021 is provided with a third limiting part 20210 that matches the second limiting part 3103. The second limiting part 3103 and the third limiting part 20210 are engaged and fixed. The mutual engaging second limiting part 3103 and third limiting part 20210 on the inner walls of the connector body 2021 and the first sub-accommodating groove 3101 further enhance the fixing effect of the connector body 2021 within the first sub-accommodating groove 3101, effectively preventing the connector body 2021 from falling out of the accommodating groove 310 due to shaking, collision, or other external forces during storage. For example, the second limiting part 3103 can be, for example, a groove, and the third limiting part 20210 can be, for example, a protrusion, with the two engaging and fixed together.

[0045] Reference Figure 7 and Figure 8 As shown in the embodiment of this utility model, the connector body 2021 includes a face cover 20211, which is located on the side of the connector body 2021 away from the connecting terminal 2024. A first joint portion 2023 is provided at the connection between the face cover 20211 and the connector body 2021. The groove of the receiving groove 310 is provided with a second joint portion 3104 that matches the first joint portion 2023. When the electrical connector 202 is stored in the receiving groove 310, the first joint portion 2023 and the second joint portion 3104 are matched and connected.

[0046] The first joint 2023 and the second joint 3104 form a sealed connection, which can effectively prevent external dust, moisture and other impurities from entering the receiving groove 310, avoid impurities from adhering to the metal contacts or interfaces of the electrical connector 202, prevent charging failures caused by poor contact, and at the same time reduce the corrosion of internal components of the electrical connector 202 by impurities, thus extending the service life of the electrical connector 202.

[0047] Reference Figure 8 and Figure 10As shown, in one embodiment of this utility model, the first joint 2023 is provided with a first arc-shaped surface, and the second joint 3104 is provided with a second arc-shaped surface that matches the first arc-shaped surface. When the electrical connector 202 is housed in the receiving groove 310, the first arc-shaped surface and the second arc-shaped surface are in contact; or, the size of the second joint 3104 gradually decreases along the direction from the opening of the receiving groove 310 towards the bottom of the groove. The arc-shaped surface design enables a tight fit between surfaces, and the continuous curved surface contact increases the sealing area and reduces the generation of gaps. Secondly, the smooth transition structure makes the overall appearance more fluid and harmonious, significantly improving the aesthetics of the product and providing users with a comfortable visual experience. In another embodiment of this utility model, the first joint 2023 and the second joint 3104 can also be stepped. The size of the second joint 3104 gradually decreases along the opening of the groove towards the bottom of the groove, forming a natural conical guide structure. Secondly, the dimensional settings of the second joint 3104 and the first joint 2023 improve the airtightness when the connector is connected to the storage groove, better protect the electrical connector from contamination by impurities, ensure its long-term stability and reliability, and extend the service life of the electrical connector.

[0048] Furthermore, it is understood that the foregoing embodiments are merely illustrative examples of this utility model. Provided that the technical features do not conflict, the structure is not contradictory, and the inventive purpose of this utility model is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A portable power bank with a built-in cable (1), characterized in that, include: Equipment body (10); The retractable data cable (20) includes a retractable connecting cable (201) and an electrical connector (202) electrically connected to one end of the retractable connecting cable (201), the other end of the retractable connecting cable (201) being retractably disposed within the device body (10); A storage component (30) is connected to the main body of the device (10). The storage component (30) includes a storage component body (31) and a connector (313). The two ends of the connector (313) are respectively connected to the storage component body (31) and the main body of the device (10). The storage component body (31) is provided with a storage part. The electrical connector (202) is detachably connected to the storage part. When the electrical connector (202) is connected to the storage part, the telescopic connecting line (201) and the storage part (30) form a suspension structure.

2. The self-contained power bank (1) according to claim 1, characterized in that, The telescopic connecting line (201) includes an inner section and an outer section (2011), wherein the outer section (2011) is disposed between the inner section and the electrical connector (202); When the telescopic connecting line (201) is in its maximum retracted state, the built-in section is located inside the device body (10), and the extended section (2011) is exposed outside the device body (10). The extended section (2011), together with the storage body (31) and the connector (313), forms the suspension structure.

3. The self-contained power bank (1) according to claim 2, characterized in that, The main body (31) of the storage component is provided with a wire hole (312), and the telescopic connecting wire (201) is slidably inserted into the wire hole (312); wherein, The extension segment (2011) passes through the wire hole (312) and connects to the electrical connector (202). When the electrical connector (202) is connected to the storage part, the extension segment (2011) and the main body (31) of the storage part enclose and form a hook space (40).

4. The self-contained power bank (1) according to claim 1, characterized in that, The telescopic connecting line (201) includes an inner section and an outer extension section (2011). The main body of the storage component (31) is provided with a wire hole (312). The outer extension section (2011) is slidably inserted into the wire hole (312). The outer extension section (2011), the connector (313), and the main body of the storage component (31) form a handle space (41).

5. The self-contained power bank (1) according to claim 4, characterized in that, The telescopic connecting line (201) is provided with a first limiting part (2012), which is located at the part of the extension section (2011) that passes through the wire hole (312), and the first limiting part (2012) is spaced apart from the electrical connector (202).

6. The self-contained power bank (1) according to claim 1, characterized in that, The main body (31) of the storage component is provided with a wire hole (312), and the telescopic connecting wire (201) is slidably inserted into the wire hole (312); the storage part is provided with a receiving groove (310) extending into the main body (31) of the storage component, and the opening of the wire hole (312), the receiving groove (310), and the connector (313) are arranged sequentially at intervals along the circumference of the main body (31).

7. The self-contained power bank (1) according to claim 6, characterized in that, The electrical connector (202) includes a connector body (2021) and a connecting terminal (2024) connected to the connector body (2021). The telescopic connecting line (201) is located at one end of the connector body (2021) along its length, and the connecting terminal (2024) extends in a direction perpendicular to the length of the connector body (2021).

8. The self-contained power bank (1) according to claim 7, characterized in that, The receiving groove (310) is provided with a first sub-receiving groove (3101) and a second sub-receiving groove (3102). The second sub-receiving groove (3102) is located at the bottom of the first sub-receiving groove (3101). The opening size of the second sub-receiving groove (3102) is smaller than the bottom size of the first sub-receiving groove (3101) to form a stepped structure.

9. The self-contained power bank (1) according to claim 8, characterized in that, The inner wall of the first sub-accommodating groove (3101) is provided with a second limiting part (3103), and the side wall of the connector body (2021) is provided with a third limiting part (20210) that matches the second limiting part (3103). The second limiting part (3103) and the third limiting part (20210) are engaged and fixed.

10. The self-contained power bank (1) according to claim 7, characterized in that, The connector body (2021) includes a face cover (20211), which is located on the side of the connector body (2021) away from the connecting terminal (2024). A first engagement portion (2023) is provided at the connection between the face cover (20211) and the connector body (2021). The groove of the receiving groove (310) is provided with a second engagement portion (3104) that matches the first engagement portion (2023). When the electrical connector (202) is stored in the receiving groove (310), the first engagement portion (2023) and the second engagement portion (3104) are matched and connected.

11. The self-contained power bank (1) according to claim 10, characterized in that, The first joint (2023) is provided with a first arc-shaped surface, and the second joint (3104) is provided with a second arc-shaped surface that matches the first arc-shaped surface. When the electrical connector (202) is housed in the receiving groove (310), the first arc-shaped surface and the second arc-shaped surface fit together; or, the size of the second joint (3104) gradually decreases along the direction from the opening of the receiving groove (310) toward the bottom of the groove.

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