Soldering cup fixing structure of terminal connector

Abstract

The utility model discloses a welding cup fixing structure of a terminal connector, which comprises a first terminal, the welding end of the first terminal and a wire core is provided with a wire plugging hole, the inner wall surface of the wire plugging hole is provided with at least one groove channel or at least one concave point groove or the combination of the at least one groove channel and the at least one concave point groove, and the inner wall surface of the wire plugging hole is provided with at least one groove channel and at least one concave point groove. And the direction of the channel is not parallel to the direction of the plug wire hole. According to the welding cup fixing structure, the at least one channel or the at least one concave point groove or the combination of the at least one channel and the at least one concave point groove is arranged on the inner wall surface of the wire plugging hole of the first terminal, and tin enters the channel or the concave point groove during tin soldering, so that the first terminal and the wire core are firmly welded and are not easy to pull off, and the service life of the first terminal and the wire core is prolonged. And stable conduction or signal transmission between the terminal and the wire core is maintained.

Description

Technical Field

[0001] The utility model relates to a terminal connector, and more specifically to a solder cup fixing structure of a terminal connector. Background Art

[0002] A terminal connector includes a terminal, and the solder cup end of the terminal is welded to a wire core to achieve the connection between the terminal connector and a cable.

[0003] As Figures 1-3 shown, Figure 1 is a schematic diagram of a wire core 2 on a cable 1 inserted into a solder cup 3 on a second terminal 4. Figure 2 is a structural diagram of the second terminal 4 and the wire core 2 on the cable 1 fixed by welding with a second solder 5 in the prior art. Figure 3 is Figure 2 a sectional view of the welding part.

[0004] The solder cup 3 is a standard solder cup structure. After the wire core 2 is inserted into the solder cup 3 on the second terminal 4, the second solder 5 welds and fixes the wire core 2 and the solder cup 3. After the second terminal 4 is welded to the wire core 2, in most cases, the second solder 5 only welds to a partial area of the solder cup 3 and a partial area of the inner wall of the hole. During the use of the terminal, it is easy to be pulled off, resulting in unstable contact or disconnection between the second terminal and the wire core 2.

[0005] In view of this, it is necessary to improve the traditional terminal connection end. Summary of the Utility Model

[0006] Aiming at the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a solder cup fixing structure of a terminal connector. The purpose of designing this solder cup fixing structure is to make the welding between the terminal and the wire core firm, not easy to be pulled off, and keep the conduction or signal transmission between the terminal and the wire core stable.

[0007] To solve the above technical problem, the utility model is realized through the following solutions: A solder cup fixing structure of a terminal connector of the utility model includes a first terminal. The welding end of the first terminal with the wire core is provided with an insertion hole, and at least one groove or at least one concave point groove or a combination of at least one groove and at least one concave point groove is arranged on the inner wall surface of the insertion hole. The direction of the groove is not parallel to the direction of the insertion hole.

[0008] Further, the groove includes a circular groove or a special-shaped groove.

[0009] Furthermore, when there are multiple circular grooves, the circular grooves are equally spaced on the inner wall surface of the insertion hole.

[0010] Further, a circular step groove is arranged at the mouth of the insertion hole.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The solder cup fixing structure of the present utility model is provided with at least one groove or at least one concave dot groove or a combination of at least one groove and at least one concave dot groove on the inner wall surface of the wire insertion hole of the first terminal. During soldering, the solder will enter the groove or the concave dot groove, making the welding between the first terminal and the wire core firm and not easily pulled off, and maintaining the stable conduction or signal transmission between the terminal and the wire core. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a wire core on a cable being inserted into a solder cup on a second terminal in the prior art.

[0013] Figure 2 It is a structural diagram of the second terminal and the wire core on the cable being fixed by second soldering in the prior art.

[0014] Figure 3 is Figure 2 A cross-sectional view of the welding part.

[0015] Figure 4 It is a schematic structural diagram of the first terminal of the present utility model after being welded with the wire core.

[0016] Figure 5 is Figure 4 A cross-sectional view.

[0017] Figure 6 It is a structural diagram of the groove in the wire insertion hole of the present utility model.

[0018] Figure 7 It is a structural diagram of the first solder after solidification in the present utility model.

[0019] Reference numerals in the drawings: Cable 1, Wire core 2, Solder cup 3, Second terminal 4, Second solder 5, Gap 6, First terminal 7, First solder 8, Groove 71. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in the present utility model are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] Embodiment 1: The specific structure of the present utility model is as follows:

[0023] Please refer to the attached Figures 1-6 , A solder cup fixing structure of a terminal connector of the present utility model includes a first terminal 7. The welding end of the first terminal 7 and the wire core 2 is provided with an insertion hole. At least one groove 71 or at least one concave point groove or a combination of at least one groove 71 and at least one concave point groove is provided on the inner wall surface of the insertion hole. The direction of the groove 71 is not parallel to the direction of the insertion hole. With the structure that the direction of the groove 71 is not parallel to the direction of the insertion hole, when pulling the cable 1, the force application direction of the first solder 8 can act on the groove 71, and the wire core 2 is not easily pulled off.

[0024] The groove 71 includes one of a circular groove and a special-shaped groove. Preferably, the present utility model selects a circular groove, and the circular groove is easy to process the mold and is easy to form. In addition to the circular groove, a spiral groove can also be selected. The spiral groove is also easy to process and can be processed by tapping with a tap.

[0025] When multiple circular grooves are provided, the circular grooves are evenly distributed on the inner wall surface of the insertion hole. Preferably, 2 circular grooves are provided.

[0026] A circular step groove is provided at the mouth of the insertion hole. Embodiment 2

[0027] The welding process of the first terminal 7 of the present utility model and the wire core 2 is as follows:

[0028] Peel off the welding end of the cable 1 to expose the wire core 2. Inject the melted liquid tin into the insertion hole 1 through a soldering device, and then quickly insert the wire core 2 into the insertion hole. The liquid tin flows into the circular groove and combines with the inner wall of the groove. When the liquid tin solidifies, a first solder 8 as shown in Figure 7 is formed. The first solder 8 fills each circular groove and overflows the step groove. The convex ring formed by the first solder 8 interlocks with the circular groove, strengthening the strength of the solder and preventing tin from coming off. Figure 7 In, the first solder 8 is a solidified tin structure in a perfect state.

[0029] However, during the welding process, sometimes the situation of incomplete welding may occur, but part of the tin has flowed into the circular groove. The pulling-off force of this non-filled state of solid tin is also greater than that of the traditional solder structure. Embodiment 3

[0030] The concave point groove is a plurality of dot-shaped structure grooves provided on the inner wall surface of the insertion hole. When the liquid tin enters the insertion hole, the liquid tin will fill the concave point groove. After the liquid tin solidifies, the convex points formed by the solidified tin body interlock with the dot-shaped structure grooves, strengthening the strength of the solder.

[0031] In summary, the solder cup fixing structure of the present utility model is provided with at least one groove or at least one concave point groove or a combination of at least one groove and at least one concave point groove on the inner wall surface of the wire insertion hole of the first terminal. During soldering, the solder will enter the groove or the concave point groove, making the welding between the first terminal and the wire core firm, not easily pulled off, and maintaining the stable conduction or signal transmission between the terminal and the wire core.

[0032] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A solder cup fixing structure of a terminal connector, comprising a first terminal (7), characterized in that: The first terminal (7) has a wire insertion hole at its welding end with the wire core (2), and the inner wall surface of the wire insertion hole is provided with at least one groove (71) or at least one concave groove or a combination of at least one groove (71) and at least one concave groove, and the direction of the groove (71) is not parallel to the direction of the wire insertion hole.

2. A solder cup fixing structure for a terminal connector according to claim 1, characterized in that: The groove (71) comprises a circular groove or a special-shaped groove.

3. A solder cup fixing structure for a terminal connector according to claim 2, characterized in that: When there are a plurality of circular grooves, the circular grooves are distributed at equal intervals on the inner wall surface of the wire insertion hole.

4. The solder cup fixing structure of a terminal connector according to claim 1, characterized in that: The mouth of the wire insertion hole is provided with a circle of step grooves.

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