Plug and socket structure for charging lithium battery of electric baby carriage

Abstract

The invention discloses a plug and socket structure for charging a lithium battery of an electric baby carriage, relates to the electric baby carriage, and aims to solve the hidden danger of mismatching of a charger in a traditional round hole baby carriage charging structure. The technical scheme is characterized in that the plug and socket structure for charging the lithium battery of the electric baby carriage comprises a plug and a socket; the plug is provided with an electric wire used for being electrically communicated with the transformation charger, the socket is fixedly installed on the baby carriage and communicated with a power source and a control circuit of the baby carriage, the plug comprises a non-circular plugging part and an injection molding shell, and an adaptive groove is formed in the front end face of the non-circular plugging part; the socket comprises a main assembly seat, the front end face of the main assembly seat is provided with a non-circular plug-in groove, and the groove bottom of the non-circular plug-in groove is provided with an adaptive column which is in adaptive plug-in connection with the adaptive groove. According to the plug and socket structure for charging the lithium battery of the electric baby carriage, it is ensured that the plug with the corresponding voltage can only be inserted into the socket with the corresponding voltage, and therefore potential safety hazards caused by mismatching of a charger during charging of a user are eliminated.

Description

Technical Field

[0001] The present invention relates to an electric children's vehicle, and more specifically, to a plug and socket structure for charging a lithium battery of an electric children's vehicle. Background Art

[0002] An electric children's vehicle is a type of toy vehicle driven by a motor that children can drive and sit on. Currently, electric children's vehicles on the market are generally equipped with sockets for charging in cooperation with plugs.

[0003] Since the electric children's vehicles sold in the Chinese market or the American market use lead-acid batteries, which have low requirements for voltage, the sockets of current children's vehicles generally adopt a simple round hole structure.

[0004] However, for children's vehicles sold in the European market, due to European standards restrictions, lithium batteries need to be used, and lithium batteries have high requirements for voltage, that is, the voltage between the plug and the socket needs to be adapted during charging, otherwise there will be great potential safety hazards. The traditional round hole structure has certain potential hazards of misconnection; therefore, a new solution needs to be proposed to solve this problem. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a plug and socket structure for charging a lithium battery of an electric children's vehicle, ensuring that plugs with corresponding voltages can only be inserted into sockets with corresponding voltages, thereby eliminating potential safety hazards caused by users misconnecting chargers during charging.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: A plug and socket structure for charging a lithium battery of an electric children's vehicle, including a plug and a socket. The plug is provided with a wire for electrically connecting to a step-down charger. The socket is fixedly installed on the children's vehicle and is connected to the power supply and control circuit of the children's vehicle. The plug includes a non-circular insertion part and an injection molded housing wrapped around the rear section of the non-circular insertion part. An adaptation groove is provided on the front end face of the non-circular insertion part. The socket includes a main assembly seat assembled on the children's vehicle. A non-circular insertion slot for inserting the non-circular insertion part is provided on the front end face of the main assembly seat, and an adaptation post adapted to be inserted into the adaptation groove is provided at the bottom of the non-circular insertion slot.

[0007] By adopting the above technical solutions, the plug uses the non-circular insertion part to cooperate with the non-circular insertion slot of the socket, thereby realizing the limitation of the relative angle when the plug is inserted into the socket, ensuring that the positive pole is connected to the positive pole and the negative pole is connected to the negative pole during charging; the non-circular insertion part uses the adaptation groove to cooperate with the adaptation post of the non-circular insertion slot, thereby ensuring that plugs with corresponding voltages can only be inserted into sockets with corresponding voltages, and thus eliminating potential safety hazards caused by users misconnecting chargers during charging.

[0008] The present invention is further configured such that: the cross-section of the non-circular plugging portion is rectangular, and plug copper sheet grooves are respectively arranged on its upper and lower end faces, and a positive copper sheet and a negative copper sheet are respectively placed in the two plug copper sheet grooves; a positioning pin column is arranged at the bottom of the plug copper sheet groove, and the positive copper sheet and the negative copper sheet are provided with positioning pin holes for the positioning pin column to be plugged in.

[0009] The present invention is further configured such that: an assembly sheath is sleeved and fixed on the rear section of the non-circular plugging portion, and the inner wall of the assembly sheath presses and fixes the positive copper sheet and the negative copper sheet.

[0010] The present invention is further configured such that: a plug board is arranged on the front end face of the assembly sheath, a plug board groove for the plug board to be plugged in is arranged on the front end face of the main assembly seat, and a partition wall is provided between the plug board groove and the non-circular plugging groove.

[0011] The present invention is further configured such that: a power positive sheet is arranged on one side of the partition wall facing the non-circular plugging groove, and a charging negative sheet is arranged on the groove wall of the non-circular plugging groove facing the power positive sheet.

[0012] The present invention is further configured such that: two outer extension walls are symmetrically arranged on both sides of the partition wall of the main assembly seat, a discharge positive sheet is arranged between the two outer extension walls, and the discharge positive sheet is electrically connected to the control circuit and the execution circuit of the baby carriage in a conductive manner; a power connection window is penetrated through the partition wall, conductive silver dots are arranged opposite to the discharge positive sheet and the power positive sheet, and the two conductive silver dots are mutually overlapped through the power connection window, and the plug board is inserted into the plug board groove to shield the power connection window and separate the two conductive silver dots.

[0013] The present invention is further configured such that: a rear mounting pressing cover covers the two outer extension walls, a pressing plate is arranged on the top surface of the rear mounting pressing cover, and the pressing plate presses the discharge positive sheet against the partition wall; an elastic reset pressing column is arranged on the rear mounting pressing cover, and an elastic member is arranged between the elastic reset pressing column and the discharge positive sheet.

[0014] The present invention is further configured such that: the cross-sectional shape of the adaption groove is circular or rectangular or cross-shaped.

[0015] In summary, the present invention has the following beneficial effects: It realizes the limitation of the relative angle when the plug is inserted into the socket, ensuring that the positive poles are connected to each other and the negative poles are connected to each other during charging; it ensures that plugs with corresponding voltages can only be inserted into sockets with corresponding voltages, thus eliminating potential safety hazards caused by users mismatching chargers during charging; it realizes the positioning of the installation positions of the positive and negative copper sheets, preventing the positive and negative copper sheets from being pushed due to friction during insertion; it realizes the limitation of the positive and negative copper sheets, preventing them from falling off or loosening and shifting before the injection molding is completed; through the cooperation of the plug board and the plug board groove, on the one hand, it guides the user to insert the plug at a specific angle for convenience, and on the other hand, it further limits the relative angle when the plug and the socket are connected; when charging, the power supply is disconnected from the control circuit and the execution circuit of the baby carriage, effectively preventing the baby carriage from being started in the charging state and further improving charging safety; the elastic member undertakes the storage of elastic potential energy when the discharge positive electrode sheet warps and the release of elastic force when it rebounds. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the present application;

[0017] Figure 2 is the structural schematic diagram of the plug of the present application;

[0018] Figure 3 is the exploded view of the plug of the present application after hiding the injection molding shell;

[0019] Figure 4 is the structural schematic diagram of the socket of the present application;

[0020] Figure 5 is the partial cross-sectional view of the socket of the present application;

[0021] Figure 6 is the corresponding schematic diagram of the shapes of different adapter slots and voltages of the present application.

[0022] BRIEF DESCRIPTION OF THE DRAWINGS: 1. Plug; 2. Socket; 3. Non-circular insertion part; 4. Injection molding shell; 5. Adapter slot; 6. Main assembly seat; 7. Non-circular insertion slot; 8. Adapter post; 9. Plug copper sheet slot; 10. Positive copper sheet; 11. Negative copper sheet; 12. Positioning pin post; 13. Positioning pin hole; 14. Assembly sheath; 15. Plug board; 16. Plug board groove; 17. Partition wall; 18. Power positive electrode sheet; 19. Charging negative electrode sheet; 20. Outer extension wall; 21. Discharge positive electrode sheet; 22. Power connection window; 23. Conductive silver dot; 24. Rear mounting pressure cover; 25. Pressing plate; 26. Elastic reset pressure post; 27. Elastic member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] A plug - socket structure for charging a lithium - battery of an electric baby carriage, as Figure 1 , Figure 2 , Figure 4 shown, includes a plug 1 and a socket 2. The plug 1 is provided with a wire for electrically connecting to a step - down charger. The socket 2 is fixedly installed on the baby carriage and is connected to the power supply and control circuit of the baby carriage. The plug 1 includes a non - circular insertion part 3 and an injection - molded outer shell 4 wrapped around the rear section of the non - circular insertion part 3. An adaptation groove 5 is arranged on the front end face of the non - circular insertion part 3. The socket 2 includes a main assembly seat 6 assembled on the baby carriage. A non - circular insertion groove 7 for inserting the non - circular insertion part 3 is opened on the front end face of the main assembly seat 6. An adaptation post 8 adapted to be inserted into the adaptation groove 5 is arranged at the bottom of the non - circular insertion groove 7.

[0025] The plug 1 uses the non - circular insertion part 3 to cooperate with the non - circular insertion groove 7 of the socket 2, so as to realize the limitation of the relative angle when the plug 1 and the socket 2 are inserted, ensuring that the positive pole is connected to the positive pole and the negative pole is connected to the negative pole during charging. The non - circular insertion part 3 uses the adaptation groove 5 to cooperate with the adaptation post 8 of the non - circular insertion groove 7, so as to ensure that the plug 1 with a corresponding voltage can only be inserted into the socket 2 with a corresponding voltage, thus eliminating the potential safety hazard caused by the user mis - matching the charger during charging.

[0026] The specific conductive layout structure of the non - circular insertion part 3 is as follows. As Figure 2 , Figure 3 shown, the cross - section of the non - circular insertion part 3 is rectangular. Plug copper - sheet grooves 9 are integrally formed on the upper and lower end faces respectively. A positive - pole copper sheet 10 and a negative - pole copper sheet 11 are respectively placed in the two plug copper - sheet grooves 9. By limiting the cross - section structure of the non - circular insertion part 3 to be rectangular and arranging the plug copper - sheet grooves 9 on two opposite faces, the effective isolation installation of the positive - pole copper sheet 10 and the negative - pole copper sheet 11 is realized.

[0027] It should be noted that, as Figure 3 shown, a positioning pin post 12 is integrally formed at the bottom of the plug copper - sheet groove 9. The positive - pole copper sheet 10 and the negative - pole copper sheet 11 are provided with positioning pin holes 13 for inserting the positioning pin post 12. On the one hand, it realizes the positioning of the installation positions of the positive - pole copper sheet 10 and the negative - pole copper sheet 11. On the other hand, it prevents the positive - pole copper sheet 10 and the negative - pole copper sheet 11 from being pushed due to friction during the insertion process.

[0028] After the positive - pole copper sheet 10 and the negative - pole copper sheet 11 are placed in the plug copper - sheet grooves 9, an injection - molding process is required to form the injection - molded outer shell 4. To prevent the positive - pole copper sheet 10 and the negative - pole copper sheet 11 from falling off or loosening and shifting during the injection - molding process, as Figure 2 , Figure 3 shown, an assembly sheath 14 is sleeved and fixed on the rear section of the non - circular insertion part 3. The inner wall of the assembly sheath 14 presses and fixes the positive - pole copper sheet 10 and the negative - pole copper sheet 11, thus realizing the limitation of the positive - pole copper sheet 10 and the negative - pole copper sheet 11 and preventing them from falling off or loosening and shifting before the injection - molding is completed.

[0029] To further define the relative angle when the plug 1 and the socket 2 are connected, for example Figure 2 , Figure 3 , Figure 4 As shown, an insertion plate 15 is integrally formed on the front end face of the assembly sheath 14. An insertion plate groove 16 for inserting the insertion plate 15 is provided on the front end face of the main assembly seat 6. There is a partition wall 17 between the insertion plate groove 16 and the non-circular insertion groove 7. Through the cooperation of the insertion plate 15 and the insertion plate groove 16, on the one hand, it guides the user to insert the plug 1 at a specific angle for convenience, and on the other hand, it further defines the relative angle when the plug 1 and the socket 2 are connected.

[0030] The non-circular insertion groove 7 cooperates with the non-circular insertion part 3 through the following conductive layout structure, for example Figure 4 As shown, a power supply positive electrode piece 18 is clamped and reinforced with glue on one side of the non-circular insertion groove 7 where the partition wall 17 is located. A charging negative electrode piece 19 is clamped and reinforced with glue on the groove wall of the non-circular insertion groove 7 facing the power supply positive electrode piece 18. Thus, the power supply positive electrode piece 18 is conductively connected to the positive copper piece 10, and the charging negative electrode piece 19 is conductively connected to the negative copper piece 11.

[0031] To further improve the charging safety, the present application is provided with a design to prevent the baby carriage from starting in the charging state. The specific structure of this design is as follows, for example Figure 5 As shown, two outer extension walls 20 are integrally formed symmetrically on both sides of the partition wall 17 of the main assembly seat 6. A discharge positive electrode piece 21 is placed between the two outer extension walls 20. The discharge positive electrode piece 21 is conductively connected to the control circuit and the execution circuit of the baby carriage, thereby introducing the discharge positive electrode circuit for starting the baby carriage into the socket 2. The partition wall 17 is provided with a power connection window 22 through it. Conductive silver dots 23 are provided opposite to the discharge positive electrode piece 21 and the power supply positive electrode piece 18. The two conductive silver dots 23 are mutually connected through the power connection window 22. When the insertion plate 15 is inserted into the insertion plate groove 16, the power connection window 22 is shielded, and the two conductive silver dots 23 are separated.

[0032] In the non-charging state of the present application, the two conductive silver dots 23 of the discharge positive electrode piece 21 and the power supply positive electrode piece 18 are mutually connected, so that the power supply is conductively connected to the control circuit and the execution circuit of the baby carriage. When charging is required, when the user inserts the plug 1 into the socket 2, the insertion plate 15 is synchronously inserted into the insertion plate groove 16, thereby realizing the separation of the two conductive silver dots 23, and further disconnecting the current conduction between the discharge positive electrode piece 21 and the power supply positive electrode piece 18, that is, disconnecting the power supply from the control circuit and the execution circuit of the baby carriage, effectively preventing the baby carriage from being started in the charging state and further improving the charging safety.

[0033] It should be noted that, for example Figure 5As shown in the figure, two outer extension walls 20 cover a rear mounting gland 24. A pressing plate 25 is provided on the top surface of the rear mounting gland 24. The pressing plate 25 presses the discharge positive electrode plate 21 against the spacer wall 17. On the premise of realizing the fixed installation of the discharge positive electrode plate 21 through the rear mounting gland 24 and the pressing plate 25, it is ensured that the discharge positive electrode plate 21 has sufficient warping space to meet the technical requirement that the discharge positive electrode plate 21 warps when the plug board 15 is inserted, so that the two conductive silver points 23 are separated.

[0034] This application utilizes the warping and rebounding of the discharge positive electrode plate 21 to achieve the disconnection and latching of the two conductive silver points 23. However, it is found in actual use that if the discharge positive electrode plate 21 is made of copper with good electrical conductivity, its elastic deformation ability is poor, and there is a problem that it cannot rebound smoothly after multiple deformations or long-term deformations. Therefore, as Figure 5 shown in the figure, the rear mounting gland 24 is integrally formed with an elastic reset pressing column 26. An elastic member 27 is arranged between the elastic reset pressing column 26 and the discharge positive electrode plate 21. The elastic member 27 can be a compression spring or an elastic rubber block. In this embodiment, an elastic rubber block is adopted, so that the elastic member 27 undertakes the storage of elastic potential energy when the discharge positive electrode plate 21 warps and the release of elastic force when it rebounds.

[0035] As Figure 6 shown in the figure, the specific shape of the adaptation slot 5 and the corresponding voltage in this embodiment are as follows. The cross-sectional shape of the adaptation slot 5 is circular or rectangular or cross-shaped. Among them, the circular shape corresponds to 24V, the cross-shaped with a wider horizontal side and a narrower vertical side corresponds to 12V, and the cross-shaped with a narrower horizontal side and a wider vertical side corresponds to 6V.

[0036] The specific embodiments are only interpretations of the present invention and do not limit the present invention. Those skilled in the art can make modifications to the embodiments without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A plug - socket structure for charging a lithium - battery of an electric baby carriage, comprising a plug (1) and a socket (2). The plug (1) is provided with a wire for electrically connecting to a step - down charger. The socket (2) is fixedly installed on the baby carriage and is connected to the power supply and control circuit of the baby carriage. It is characterized in that: The plug (1) includes a non - circular insertion part (3) and an injection - molded outer shell (4) wrapped around the rear section of the non - circular insertion part (3). An adaptation groove (5) is arranged on the front end face of the non - circular insertion part (3); The socket (2) includes a main assembly seat (6) assembled on the baby carriage. A non - circular insertion groove (7) for inserting the non - circular insertion part (3) is opened on the front end face of the main assembly seat (6). An adaptation post (8) adapted to be inserted into the adaptation groove (5) is arranged at the bottom of the non - circular insertion groove (7).

2. The plug and socket structure for charging a lithium battery of an electric children's vehicle according to claim 1, wherein: The cross - section of the non - circular insertion part (3) is rectangular. Plug copper - sheet grooves (9) are respectively arranged on the upper and lower end faces thereof. A positive - electrode copper sheet (10) and a negative - electrode copper sheet (11) are respectively placed in the two plug copper - sheet grooves (9). A positioning pin post (12) is arranged at the bottom of the plug copper - sheet groove (9). The positive - electrode copper sheet (10) and the negative - electrode copper sheet (11) are provided with positioning pin holes (13) for inserting the positioning pin post (12).

3. The plug and socket structure for charging the lithium battery of an electric baby carriage according to claim 2, characterized in that: An assembly sheath (14) is sleeved and fixed on the rear section of the non - circular insertion part (3). The inner wall of the assembly sheath (14) tightly presses and fixes the positive - electrode copper sheet (10) and the negative - electrode copper sheet (11).

4. The plug and socket structure for charging the lithium battery of an electric children's vehicle according to claim 3, characterized in that: An insertion plate (15) is arranged on the front end face of the assembly sheath (14). An insertion - plate groove (16) for inserting the insertion plate (15) is arranged on the front end face of the main assembly seat (6). A partition wall (17) is provided between the insertion - plate groove (16) and the non - circular insertion groove (7).

5. The plug and socket structure for charging a lithium battery of an electric baby carriage according to claim 4, characterized in that: A power - supply positive - electrode sheet (18) is arranged on one side of the partition wall (17) facing the non - circular insertion groove (7). A charging negative - electrode sheet (19) is arranged on the groove wall of the non - circular insertion groove (7) facing the power - supply positive - electrode sheet (18).

6. The plug and socket structure for charging a lithium battery of an electric baby carriage according to claim 5, wherein: Two outer extension walls (20) are symmetrically arranged on both sides of the main assembly seat (6) along the partition wall (17). A discharge positive - electrode sheet (21) is arranged between the two outer extension walls (20). The discharge positive - electrode sheet (21) is electrically connected to the control circuit and the execution circuit of the baby carriage. A power - connection window (22) is penetrated through the partition wall (17). Conductive silver dots (23) are arranged opposite to each other on the discharge positive - electrode sheet (21) and the power - supply positive - electrode sheet (18). The two conductive silver dots (23) are mutually overlapped through the power - connection window (22). The insertion plate (15) is inserted into the insertion - plate groove (16) to shield the power - connection window (22) and separate the two conductive silver dots (23).

7. The plug and socket structure for charging the lithium battery of an electric children's vehicle according to claim 6, wherein: A rear - mounting pressure cover (24) covers the two outer extension walls (20). A pressing plate (25) is arranged on the top surface of the rear - mounting pressure cover (24). The pressing plate (25) presses the discharge positive - electrode sheet (21) tightly against the partition wall (17). The rear - mounting pressure cover (24) is provided with an elastic reset pressure post (26). An elastic member (27) is arranged between the elastic reset pressure post (26) and the discharge positive - electrode sheet (21).

8. The plug and socket structure for charging the lithium battery of an electric children's vehicle according to claim 1, characterized in that: The cross - sectional shape of the adaptation groove (5) is circular or rectangular or cross - shaped.

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