Dimension testing fixture for output plug of battery charger of electric bicycle

Abstract

The utility model belongs to the technical field of detection devices, and discloses an electric bicycle battery charger output plug size detection tool comprising a detection panel, the detection panel is provided with a plurality of detection units, and each detection unit is provided with a slot for insertion of a plug body. A positioning column which is correspondingly inserted into the positive electrode interface and a boss which is correspondingly embedded into the concave cavity are arranged in the insertion groove, and a positioning interface which is correspondingly connected with the negative electrode conductive terminal in an inserted mode and positioning holes which are correspondingly connected with the functional terminals in an inserted mode in a one-to-one mode are formed in the boss. The fit clearance between the positioning column and the positive electrode interface, the fit clearance between the positioning interface and the negative electrode conductive terminal, and the fit clearance between the positioning hole and the functional terminal are all not larger than 1 mm. The size testing fixture for the output plug of the battery charger of the electric bicycle is provided with the testing unit which is accurately matched with the design size of the plug body, so that the measurement difficulty of testing personnel is reduced, the testing result is ensured, and the testing efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a size detection tool for an output plug of an electric bicycle battery charger. Background Art

[0002] The charger for electric bicycles has its own safety technical requirements, including protection against electric shock, mechanical safety, electrical safety, environmental adaptability, heating and thermal runaway, output interface safety, heat resistance and fire retardancy. Among them, the requirements for output interface safety are: the plug and socket systems of chargers of different battery types cannot be plugged into each other; when the charger charges an incompatible battery pack system, there should be no output; the two metal conductive parts of the positive and negative poles of the charger's DC output terminal cannot be touched at the same time; the effective value of the charger's no-load output voltage should not be higher than 42.4V; the charger and the charged battery pack (system) should have a mutual recognition and coordination agreement. In addition, there are the most basic plug-and-socket plug-in requirements, which should ensure a suitable matching gap between the charger's plug and the battery connection socket, to ensure both smooth and convenient plug-in operation and reliable electrical connection performance, so the plug size parameters need to be strictly controlled.

[0003] Figure 1 The figure shows a schematic diagram of the structure of an output plug of a lithium-ion battery charger, which includes a plug body 3, a positive electrode interface 31 is arranged on the end surface of the plug body 3 and located in the upper left half, a concave cavity 32 is formed in the upper right half and the lower half of the end surface, a negative electrode conductive terminal 33 and four functional terminals 34 are arranged in the concave cavity 32, the position of the positive electrode interface 31 and the position of the negative electrode conductive terminal 33 are distributed on the left and right, and the four functional terminals 34 are distributed in a row on the lower side of the positive electrode interface 31 and the negative electrode conductive terminal 33.

[0004] During the size inspection, in addition to the external dimensions of the plug body 3, the more important ones are the cross-sectional dimensions of the positive electrode interface 31, the cross-sectional dimensions of the negative electrode conductive terminal 33, the diameter dimensions of the four functional terminals 34, the center distance between the positive electrode interface 31 and the negative electrode conductive terminal 33, the center distance between adjacent functional terminals 34, and the center distance between the functional terminal 34 and the positive electrode interface 31 and the negative electrode conductive terminal 33.

[0005] At present, the charger plug is mainly made by injection molding. When verifying the size parameters of the plug, it is mainly measured manually with a ruler or compared with a 1:1 end face drawing to determine whether the positions of the positive electrode interface 31, the negative electrode conductive terminal 33 and the functional terminal 34 are accurate. The above-mentioned detection results are not accurate enough and the batch testing efficiency is low. It is hoped that a dedicated detection device can be designed to meet the detection needs. Utility Model Content

[0006] Based on the above problems, the purpose of the utility model is to provide an electric bicycle battery charger output plug size gauge to facilitate determining whether the positions of the positive electrode interface, negative conductive terminal and functional terminal on the plug are accurate, ensuring that the plug can be reliably plugged into the corresponding socket.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A size gauge for an output plug of an electric bicycle battery charger. The charger output plug comprises a plug body. An end face of the plug body is provided with a positive electrode interface and a concave cavity recessed relative to the positive electrode interface. A negative electrode conductive terminal and a plurality of functional terminals are provided in the concave cavity. The electric bicycle battery charger output plug size gauge comprises a detection panel. The detection panel is provided with a plurality of inspection units. Each inspection unit is provided with a slot for inserting the plug body. The slot is provided with a positioning column corresponding to the positive electrode interface and a boss corresponding to the concave cavity. The boss is provided with a positioning interface corresponding to the negative electrode conductive terminal and a positioning hole corresponding to each functional terminal. When a plug body with qualified size is inserted into the inspection unit, the matching clearance between the positioning column and the positive electrode interface, the matching clearance between the positioning interface and the negative electrode conductive terminal, and the matching clearance between the positioning hole and the functional terminal are all no more than 1 mm.

[0009] As an optional scheme, the positive electrode interface is located in the upper left half of the end face of the plug body, the concave cavity is formed in the upper right half and lower half of the end face of the plug body, the position of the positive electrode interface and the position of the negative electrode conductive terminal are distributed on the left and right, and multiple functional terminals are distributed in rows on the lower side of the positive electrode interface and the negative electrode conductive terminal; the positioning column is located in the upper right half of the end face of the inspection unit, the boss is formed in the upper left half and lower half of the end face of the inspection unit, the position of the positioning interface and the position of the positioning column are distributed on the left and right, and multiple positioning holes are distributed in rows on the lower side of the positioning interface and the positioning column.

[0010] As an optional solution, the outer dimensions of the boss are 0.3 mm smaller than the inner dimensions of the cavity, so that the boss can be easily embedded in the cavity.

[0011] As an optional solution, the outer dimensions of the plug body are 0.3 mm smaller than the inner dimensions of the slot, so that the plug body is easily inserted into the slot.

[0012] As an optional solution, a plurality of inspection units are distributed in an array on the inspection panel, and a plurality of installation positions for installing the inspection units are provided on the inspection panel.

[0013] As an optional solution, fixing holes are provided on both sides of each inspection unit, threaded holes aligned with the fixing holes are provided on both sides of the installation position, and screws matching with the threaded holes are passed through the fixing holes.

[0014] The beneficial effects of the utility model are as follows: the electric bicycle battery charger output plug size inspection tool is provided with an inspection unit and a positioning column, a positioning interface and a positioning hole thereon which are accurately matched with the design size of the plug body and the positive electrode interface, the negative electrode conductive terminal and the functional terminal thereon; it is only necessary to insert the plug of the to-be-verified size into the inspection unit; if it can be accurately inserted, it can be determined that the size of the plug meets the requirements, thereby reducing the measurement difficulty of the inspectors, ensuring the inspection results and greatly improving the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a lithium-ion battery charger output plug in the prior art;

[0016] Figure 2 yes Figure 1 Dimensional design drawing of the plug end face;

[0017] Figure 3 It is a structural schematic diagram of an output plug size gauge for an electric bicycle battery charger provided by an embodiment of the utility model;

[0018] Figure 4 It is a structural diagram of a testing unit in a size testing fixture for an output plug of an electric bicycle battery charger provided by an embodiment of the utility model.

[0019] In the attached figure:

[0020] 1. Detection panel; 11. Installation position; 12. Threaded hole;

[0021] 2. Inspection unit; 21. Slot; 22. Positioning column; 23. Boss; 24. Positioning interface; 25. Positioning hole; 26. Fixing hole;

[0022] 3. Plug body; 31. Positive electrode interface; 32. Concave cavity; 33. Negative conductive terminal; 34. Functional terminal. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0027] This preferred embodiment provides an electric bicycle battery charger output plug size inspection tool for Figure 1 The charger output plug shown includes a plug body 3 , on the end surface of which a positive electrode interface 31 and a cavity 32 recessed relative to the positive electrode interface 31 are provided, and in the cavity 32 a negative electrode conductive terminal 33 and a plurality of functional terminals 34 are provided.

[0028] Specifically, the positive electrode interface 31 is located in the upper left half of the end surface of the plug body 3, and the concave cavity 32 is formed in the upper right half and the lower half of the end surface of the plug body 3. The position of the positive electrode interface 31 and the position of the negative electrode conductive terminal 33 are distributed on the left and right, and multiple functional terminals 34 are distributed in rows on the lower side of the positive electrode interface 31 and the negative electrode conductive terminal 33.

[0029] like Figure 2As shown, the length dimension of the plug body 3 is 28.9mm, the width dimension is 17.9mm, the cross-sectional design dimension of the positive electrode interface 31 is 6mm*3mm, the cross-sectional design dimension of the negative electrode conductive terminal 33 is 5mm*2mm, the center distance between the positive electrode interface 31 and the negative electrode conductive terminal 33 is 14mm, the diameter design dimension of the four functional terminals 34 is 2.2mm, the center distance between adjacent functional terminals 34 is designed to be 6mm, and the center distance between the functional terminal 34 and the positive electrode interface 31 and the negative electrode conductive terminal 33 is 7.6mm.

[0030] See also Figure 3 and Figure 4 As shown, the electric bicycle battery charger output plug size inspection tool includes a detection panel 1, on which a plurality of inspection units 2 are arranged, each inspection unit 2 is provided with a slot 21 for inserting a plug body 3, the slot 21 is provided with a positioning column 22 correspondingly inserted into the positive electrode interface 31 and a boss 23 correspondingly embedded in the concave cavity 32, the boss 23 is provided with a positioning interface 24 correspondingly plugged with the negative electrode conductive terminal 33 and a positioning hole 25 correspondingly plugged with each functional terminal 34, when the plug body 3 with qualified size is inserted into the inspection unit 2, the matching clearance between the positioning column 22 and the positive electrode interface 31, the matching clearance between the positioning interface 24 and the negative electrode conductive terminal 33, and the matching clearance between the positioning hole 25 and the functional terminal 34 are all less than 1 mm, under this matching clearance, the plug body 3 can have reliable electrical connection performance when docking with the corresponding socket.

[0031] Therefore, the electric bicycle battery charger output plug size inspection tool is provided with an inspection unit 2 and a positioning column 22, a positioning interface 24 and a positioning hole 25 thereon, which are accurately matched with the design dimensions of the plug body 3 and the positive electrode interface 31, the negative conductive terminal 33 and the functional terminal 34 thereon. It is only necessary to insert the plug whose size is to be verified into the inspection unit 2. If it can be inserted accurately, it can be determined that the size of the plug meets the requirements, thereby reducing the measurement difficulty of the inspector, ensuring the inspection results, and greatly improving the inspection efficiency.

[0032] According to the distribution positions of the positive electrode interface 31, the cavity 32, the negative electrode conductive terminal 33, and the functional terminal 34 on the end surface of the plug body 3, correspondingly, the positioning column 22 is located in the upper right half of the end surface of the inspection unit 2, and the boss 23 is formed in the upper left half and lower half of the end surface of the inspection unit 2. The position of the positioning interface 24 is distributed left and right with the position of the positioning column 22, and a plurality of positioning holes 25 are distributed in a row on the lower side of the positioning interface 24 and the positioning column 22.

[0033] In particular, the outer dimensions of the plug body 3 are 0.3 mm smaller than the inner dimensions of the slot 21, which facilitates the insertion of the plug body 3 into the slot 21. According to the length dimension of the plug body 3 being 28.9 mm and the width dimension being 17.9 mm, the inner length dimension of the slot 21 is 29.2 mm and the width dimension is 18.2 mm. Similarly, the outer dimensions of the boss 23 are 0.3 mm smaller than the inner dimensions of the cavity 32, which facilitates the insertion of the boss 23 into the cavity 32.

[0034] Among them, multiple inspection units 2 are distributed in an array on the inspection panel 1, and multiple installation positions 11 for installing the inspection units 2 are set on the inspection panel 1, so as to realize multi-station inspection operation of batch plug bodies 3, and to set the number of inspection units 2 and replace the model of inspection units 2 according to needs.

[0035] Specifically, each inspection unit 2 is provided with fixing holes 26 on both sides, and threaded holes 12 aligned with the fixing holes 26 are provided on both sides of the mounting position 11. Screws matching with the threaded holes 12 are passed through the fixing holes 26 to realize the detachable installation of the inspection unit 2 and the detection panel 1.

[0036] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A size gauge for an output plug of an electric bicycle battery charger, the output plug of the charger comprising a plug body (3), the end surface of the plug body (3) being provided with a positive electrode interface (31) and a cavity (32) recessed relative to the positive electrode interface (31), the cavity (32) being provided with a negative electrode conductive terminal (33) and a plurality of functional terminals (34), characterized in that: The electric bicycle battery charger output plug size inspection tool comprises a detection panel (1), the detection panel (1) is provided with a plurality of inspection units (2), each of the inspection units (2) is provided with a slot (21) for inserting the plug body (3), the slot (21) is provided with a positioning column (22) correspondingly inserted into the positive electrode interface (31) and a boss (23) correspondingly embedded in the cavity (32), the boss (23) is provided with a positioning interface (24) correspondingly plugged into the negative electrode conductive terminal (33) and a positioning hole (25) correspondingly plugged into each functional terminal (34), when the plug body (3) of qualified size is inserted into the inspection unit (2), the matching clearance between the positioning column (22) and the positive electrode interface (31), the matching clearance between the positioning interface (24) and the negative electrode conductive terminal (33), and the matching clearance between the positioning hole (25) and the functional terminal (34) are all less than 1 mm.

2. The electric bicycle battery charger output plug size gauge according to claim 1, characterized in that: The positive electrode interface (31) is located in the upper left half of the end surface of the plug body (3), the concave cavity (32) is formed in the upper right half and the lower half of the end surface of the plug body (3), the position of the positive electrode interface (31) and the position of the negative electrode conductive terminal (33) are distributed on the left and right, and the plurality of functional terminals (34) are distributed in a row on the lower side of the positive electrode interface (31) and the negative electrode conductive terminal (33); The positioning column (22) is located in the upper right half of the end surface of the inspection unit (2), the boss (23) is formed in the upper left half and lower half of the end surface of the inspection unit (2), the position of the positioning interface (24) is distributed on the left and right sides of the position of the positioning column (22), and a plurality of positioning holes (25) are distributed in a row on the lower side of the positioning interface (24) and the positioning column (22).

3. The electric bicycle battery charger output plug size gauge according to claim 1, characterized in that: The outer dimensions of the boss (23) are 0.3 mm smaller than the inner dimensions of the cavity (32), so that the boss (23) can be easily embedded in the cavity (32).

4. The electric bicycle battery charger output plug size gauge according to claim 1, characterized in that: The external dimensions of the plug body (3) are 0.3 mm smaller than the internal dimensions of the slot (21), making it easier for the plug body (3) to be inserted into the slot (21).

5. The electric bicycle battery charger output plug size gauge according to claim 1, characterized in that: The plurality of inspection units (2) are distributed in an array on the inspection panel (1), and the inspection panel (1) is provided with a plurality of installation positions (11) for installing the inspection units (2).

6. The electric bicycle battery charger output plug size gauge according to claim 5, characterized in that: Each inspection unit (2) is provided with fixing holes (26) on both sides, and threaded holes (12) aligned with the fixing holes (26) are provided on both sides of the installation position (11), and screws matching with the threaded holes (12) are passed through the fixing holes (26).

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