Plug connection structure

Abstract

The utility model relates to the technical field of earphone plugs, and discloses a plug connection structure, a circular coaxial pin-type plug comprises a housing, an inner layer insulating plastic, a central pin, a short pin and a connecting piece, the central pin and the short pin are arranged in the housing, the upper end of the central pin is a pin head at the central position in the upper end of the housing, and the connecting piece is arranged in the housing. The middle end of the center pin is bent, the lower end of the center pin is a round pin which is arranged on the left side of the lower end of the shell, the short pin is arranged on the right side of the lower end of the shell and is aligned with the round pin of the center pin, and the diameter of the short pin is the same as that of the round pin of the center pin. Therefore, the reliability is improved, and the requirements of users can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of earphone plugs, in particular to a plug connection structure. Background Art

[0002] In audio wired headphone products, there are two common headphone plug connection forms, one is a symmetrical double-pin type structure, and the other is a round coaxial pin type. The double-pin type plug is reliable and not easy to rotate loose, while the round coaxial pin type plug is easy to rotate loose and cause poor contact, which cannot meet the needs of users. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a plug connection structure, which transforms the circular coaxial pin plug tail structure into a double pin structure, thereby improving the reliability and meeting the needs of users.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] A plug connection structure, a circular coaxial pin-type plug includes an outer shell, an inner layer of insulating plastic, a center pin, a short pin and a connector, the center pin and the short pin are arranged inside the outer shell, the upper end of the center pin is a needle head located at the center position inside the upper end of the outer shell, the middle end of the center pin is set in a bent shape, the lower end of the center pin is a round pin located on the left side of the lower end of the outer shell, the short pin is located on the right side of the lower end of the outer shell and is symmetrical with the round pin of the center pin, and the short pin has the same diameter as the round pin of the center pin.

[0006] Furthermore, both the front and rear surfaces of the shell are provided with holes, one end of the short pin is provided with a hole, and the connecting piece is inserted from the hole of the shell to connect with the hole of the short pin.

[0007] Furthermore, the inner layer of insulating plastic is located inside the outer shell.

[0008] Compared with the prior art, the beneficial effects of the present invention are:

[0009] The center pin of the circular coaxial pin plug is transformed into a bent shape, offset to the left from the inner center position of the shell, and then a short pin of the same diameter is placed symmetrically to the right of the bent tail of the center pin. Finally, a connector is inserted into the hole of the shell and connected to the hole of the short pin. The tail of the circular coaxial pin plug is set as a double-pin structure, thereby improving reliability and meeting the needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the front view of the circular coaxial pin plug according to an embodiment of the utility model;

[0011] Figure 2 This is a structural cross-sectional view of a circular coaxial pin plug according to an embodiment of the utility model;

[0012] Figure 3 This is a structural illustration of a method for producing a circular coaxial pin plug according to an embodiment of the utility model.

[0013] In the figure: 1. outer shell; 2. inner insulating plastic; 3. center pin; 4. short pin; 5. connector. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0015] like Figure 1-3 As shown, a plug connection structure is shown, the circular coaxial pin plug includes a shell 1, an inner layer of insulating plastic 2, a center pin 3, a short pin 4 and a connector 5. The center pin 3 and the short pin 4 are arranged inside the shell 1. The upper end of the center pin 3 is a needle head located at the center position inside the upper end of the shell 1, the middle end of the center pin 3 is set to a bent shape, the lower end of the center pin 3 is a round needle located on the left side of the lower end of the shell 1, and the short pin 4 is located on the right side of the lower end of the shell 1 and is symmetrical with the round pin of the center pin 3. The short pin 4 and the round pin of the center pin 3 have the same diameter. The tail of the circular coaxial pin plug is set to a double-pin structure, thereby improving the reliability and meeting the needs of users.

[0016] As a preferred embodiment, both the front and rear surfaces of the shell 1 are provided with holes, one end of the short pin 4 is provided with a hole, and the connecting piece 5 is inserted from the hole of the shell 1 and connected with the hole of the short pin 4, so that the connecting piece 5 can connect the shell 1 with the short pin 4.

[0017] As a preferred embodiment, the inner insulating plastic layer 2 is located inside the outer shell 1 , and the inner insulating plastic layer 2 can firmly secure the center pin 3 and the short pin 4 inside the outer shell 1 .

[0018] The working principle of this utility model:

[0019] When the circular coaxial pin plug is welded to the headphone cable, the center pin 3 is welded to the positive wire core of the headphone cable first, and then the short pin 4 is welded to the negative wire core of the headphone cable. The headphone cable using the circular coaxial pin plug is not easy to loosen when rotated, thereby improving the reliability and meeting the needs of users.

[0020] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A plug connection structure, a circular coaxial pin plug comprising a shell, an inner insulating plastic, a center pin, a short pin and a connector, characterized in that: The center needle and the short needle are provided inside the shell, the upper end of the center needle is a needle head located at the center position inside the upper end of the shell, the middle end of the center needle is set to a bent shape, the lower end of the center needle is a round needle located on the left side of the lower end of the shell, the short needle is located on the right side of the lower end of the shell and is symmetrical with the round needle of the center needle, and the short needle has the same diameter as the round needle of the center needle.

2. A plug connection structure according to claim 1, characterized in that: The front and rear surfaces of the shell are both provided with holes, one end of the short pin is provided with a hole, and the connecting piece is inserted from the hole of the shell and connected with the hole of the short pin.

3. A plug connection structure according to claim 1, characterized in that: The inner layer of insulating plastic is located inside the outer shell.

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