A connector structure

Abstract

The utility model discloses a connector structure, one end is connected with PCB board electricity, the connector structure includes fixed base and a plurality of terminals, the terminal includes connecting lever portion, fixed lever portion, positioning lever portion and end portion in proper order from one end to another, be provided with first step surface between connecting lever portion and fixed lever portion, be provided with second step surface between fixed lever portion and positioning lever portion, be provided with third step surface between positioning lever portion and end portion, and the peripheral size of positioning lever portion is greater than the peripheral size of end portion, the fixed lever portion is embedded in fixed base and is integrally formed with fixed base, and the positioning lever portion is used for inserting in the through -hole of PCB board. The utility model has the advantages that the end portion periphery of terminal is arranged in positioning column, does not need to occupy the mounting space on fixed base additionally, thereby can set the size of fixed base smaller, does not need to open the through -hole on PCB board additionally, thereby is not easy to cause PCB board signal attenuation and interference.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a connector structure. Background Technology

[0002] To ensure the normal operation of the PCB board, a connector structure is required. This connector structure is responsible for transmitting current, electrical signals, and data to the PCB board. The connector structure includes a mounting base and several terminals. The terminals are mounted on the mounting base, and the connector structure, acting as the male terminal, is assembled with the PCB board. The terminals of the connector structure pass through the through-holes on the PCB board and are then soldered to the PCB pads.

[0003] like Figures 1-3 As shown, in order to ensure that each terminal 2' of the connector structure can be accurately positioned and installed with each through hole 411 on the PCB board 4, a number of positioning posts 3' are provided on the fixing base 1', and through holes 411 corresponding to the positioning posts 3' are opened on the PCB board 4; each positioning post 3' on the fixing base 1' is inserted into the corresponding through hole 411, thereby ensuring that each terminal 2' and the corresponding through hole 411 are accurately positioned and installed.

[0004] However, the existing positioning posts 3' are directly set on the fixing base 1', which requires a larger fixing base 1' to provide more installation space; at the same time, more through holes 411 need to be opened on the PCB board 4. This results in the existing connector structure being too large, with higher production costs. The excessive number of through holes 411 on the PCB board 4 can easily cause signal attenuation and interference on the PCB board 4, as well as reduce the reliability of the electrical connection on the PCB board 4. Improvements are needed in these areas. Utility Model Content

[0005] The purpose of this invention is to propose a connector structure with a smaller mounting base and without the need to open a large number of through holes on the PCB board.

[0006] This utility model proposes a connector structure, one end of which is electrically connected to a PCB board. The connector structure includes a fixing base and multiple terminals. The terminals, from one end to the other, sequentially include a connecting rod, a fixing rod, a positioning rod, and an end portion. A first stepped surface is provided between the connecting rod and the fixing rod, a second stepped surface is provided between the fixing rod and the positioning rod, and a third stepped surface is provided between the positioning rod and the end portion. The outer perimeter of the positioning rod is larger than that of the end portion. The fixing rod is embedded in the fixing base and integrally formed with the fixing base. The positioning rod is used to insert into a through hole in the PCB board.

[0007] Preferably, the third stepped surface is lower than the top surface of the through hole on the PCB board.

[0008] Preferably, the positioning rod is integrally formed, or the positioning rod is composed of a positioning sleeve fitted at the end, and the positioning sleeve is made of plastic or rubber material.

[0009] Preferably, there are seven terminals, and each terminal is centrally symmetrically distributed.

[0010] Preferably, the cross-section of the positioning rod portion of a portion of the plurality of terminals is non-circular.

[0011] Preferably, the end is soldered to the PCB pads of the PCB board by electroplating tin.

[0012] Preferably, the end of the end furthest from the fixed rod is rounded.

[0013] Preferably, the bottom end of the fixing base is integrally provided with a housing, the connecting rod of each terminal is located inside the housing, and the surface of the housing is formed with a plurality of grooves.

[0014] As can be seen from the above description of this utility model, this utility model has the following beneficial effects: 1. The connector structure does not have additional positioning posts. Instead, a positioning rod is integrally formed between the fixing rod and the end. The positioning rod positions the connector structure for installation, eliminating the need for additional positioning posts to occupy installation space on the mounting base. This allows for a smaller mounting base size. Furthermore, there is no need to drill through holes on the PCB board, thus reducing the likelihood of signal attenuation and interference on the PCB board.

[0015] 2. The ends are soldered to the PCB pads using electroplated tin, which forms a dense alloy coating on the metal surface, effectively isolating the substrate from external environmental corrosion and providing good corrosion resistance. Electroplated tin soldering is also simple to operate, with a low soldering temperature to avoid high-temperature damage, and it also has the advantages of easy solder joint inspection and repair, and low soldering cost.

[0016] 3. The positioning rod is designed to consist of an end sleeve, which makes the positioning sleeve and the end detachable. This allows positioning sleeves to be freely installed on the ends of each terminal. The number of positioning sleeves installed and their positions on the connector structure can be freely controlled, thus improving the flexibility of the assembly.

[0017] 4. The positioning sleeve is made of plastic or rubber. Positioning sleeves made of plastic have the advantage of low raw material cost; positioning sleeves made of rubber have certain elasticity, which makes the positioning sleeve fit more tightly with the through hole of the PCB pad. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the existing connector structure installed on the PCB board; Figure 2 This is a schematic diagram of the existing PCB board structure; Figure 3 This is a schematic diagram of the overall structure of the existing connector; Figure 4 This is a front view of the connector structure of Embodiment 1 of this application mounted on a PCB board; Figure 5 This is a schematic diagram of the connector structure of Embodiment 1 of this application mounted on a PCB board; Figure 6 This is a schematic diagram of the terminal structure in Embodiment 1 of this application; Figure 7 This is a schematic diagram of the structure of the fixing base in Embodiment 1 of this application; Figure 8 This is a schematic diagram of the connector structure in Embodiment 1 of this application; Figure 9 This is a schematic diagram of the PCB board structure of Embodiment 1 of this application; Figure 10 This is a cross-sectional view of the PCB board of Embodiment 1 of this application; Figure 11 This is a front view of the terminal in Embodiment 1 of this application; Figure 12 This is an installation sectional view of the connector structure of Embodiment 1 of this application; Figure 13 This is a schematic diagram of the structure of the terminal and positioning post in Embodiment 2 of this application; Figure 14 This is a schematic diagram of the outer shell of Embodiment 2 of this application.

[0019] Reference numerals: 1. Fixing base; 11. Fixing hole; 2. Terminal; 21. Connecting rod; 22. Fixing rod; 23. End; 231. Round head; 24. Positioning rod; 25. First stepped surface; 26. Second stepped surface; 27. Third stepped surface; 28. Positioning sleeve; 3'. Positioning post; 4. PCB board; 41. PCB pad; 411. Through hole; 5. Outer shell; 51. Groove. Detailed Implementation

[0020] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer and more understandable, the following description is provided in conjunction with the appendix. Figure 4-14 The present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0021] Example 1, Reference Figures 4-8A connector structure includes a mounting base 1 and seven terminals 2. Each terminal 2 comprises, from one end to the other, a connecting rod 21, a fixing rod 22, a positioning rod 24, and an end 23. The connecting rod 21, fixing rod 22, positioning rod 24, and end 23 are all integrally formed. The fixing rod 22 has the largest diameter, and the end 23 has the smallest diameter. This forms a first stepped surface 25 between the connecting rod 21 and the fixing rod 22, a second stepped surface 26 between the fixing rod 22 and the positioning rod 24, and a third stepped surface 27 between the positioning rod 24 and the end 23. After the fixing rod 22 of each terminal 2 is integrally formed with the mounting base 1, the first stepped surface 25 is flush with the bottom surface of the mounting base 1, and the second stepped surface 26 is flush with the top surface of the mounting base 1. After the fixing rod 22 of each terminal 2 is integrally formed and fixed with the fixing base 1, the terminals 2 are centrally symmetrically distributed on the fixing base 1.

[0022] Reference Figure 5 and Figure 9 The connector is made of copper and is mounted on the PCB board 4. Seven PCB pads 41 are provided on the PCB board 4, each with a through hole 411. When mounting the connector to the PCB board 4, the ends 23 of each terminal 2 pass through the through holes 411, causing the positioning rods 24 to engage within the through holes 411 of the PCB pads 41, with the outer surface of each positioning rod 24 abutting against the inner wall of the through hole 411. The positioning rods 24 of the terminal 2 are integrally formed, facilitating the assembly between the positioning rods 24 of the terminal 2 and the through holes 411 of the PCB board 4.

[0023] The positioning rods 24 of some terminals 2 have a non-circular cross-section. When installed between the connector and the PCB board 4, each positioning rod 24 of the terminal 2 passes through a through hole 411. By making the shape of the positioning rods 24 of some terminals 2 non-circular, misalignment is prevented when assembling the positioning rods 24 of the connector with the through holes 411 on the PCB board 4, thus providing a foolproof assembly method between the connector and the PCB board 4. Furthermore, the end 23 furthest from the fixing rod 22 is designed as a rounded head 231. This rounded head design facilitates accurate alignment with the through holes 411 during installation on the PCB board 4, while also reducing physical wear on the PCB pads 41 or test points, extending service life.

[0024] Reference Figure 10 and Figure 11The height of the positioning rod 24 is set to "L", and the depth of the through hole 411 is set to "H", ensuring that the relationship between the depth of the through hole 411 and the height of the positioning rod 24 satisfies H>L. After installation, the third step surface 27 is lower than the top surface of the through hole 411 on the PCB board 4, and the end 23 of the terminal 2 is fixed to the PCB pad 41 by electroplating tin. Electroplating tin welding between the end 23 and the PCB pad 41 can form a dense alloy coating on the metal surface, effectively isolating the substrate from external environmental corrosion and providing good corrosion resistance. Furthermore, electroplating tin welding is simple to operate, uses a low welding temperature to avoid high-temperature damage, and also has the advantages of easy inspection and repair of solder joints and low welding cost.

[0025] Reference Figure 12 The specific implementation principle of this application embodiment is as follows: When it is necessary to solder and fix the terminal 2 of the connector structure to the PCB pad 41 of the PCB board 4, the end 23 of the terminal 2 passes through the through hole 411 of each PCB pad 41. The positioning rod 24 located on the terminal 2 is then engaged in the through hole 411 of the PCB pad 41. After engagement, the outer surface of the positioning rod 24 is in contact with the inner wall of the through hole 411 of the PCB pad 41, thereby completing the positioning and installation between the connector structure and the PCB board 4. After installation, the fixing seat 1 abuts against the surface of the PCB board 4, and the end 23 of the terminal 2 is fixed to the PCB pad 41 of the PCB board 4 by electroplating tin.

[0026] By placing the positioning rod 24 on the terminal 2, compared to placing the positioning post 3' directly on the fixing base 1, the size of the fixing base 1 can be effectively reduced, thereby reducing the size of the connector. Correspondingly, by providing the positioning rod 24 on the terminal 2 for positioning, there is no need to additionally open a through hole 411 on the PCB board 4 to accommodate the positioning post 3'; this reduces the number of through holes 411 on the PCB board 4, resulting in better sealing and waterproofing between the PCB board 4 and the connector.

[0027] Example 2, Reference Figure 13 The difference from Embodiment 1 is that the positioning rod 24 is configured to consist of an end 23 fitted with a positioning sleeve 28, so that the positioning sleeve 28 and the end 23 of the terminal 2 are detachably installed. When it is necessary to solder and fix the terminal 2 of the connector structure to the PCB pad 41 of the PCB board 4, the positioning sleeve 28 is first fitted around the end 23, and the inner sidewall of the positioning sleeve 28 is in contact with the outer surface of the end 23, and one end of the positioning sleeve 28 abuts against the fixing rod 22 of the terminal 2.

[0028] Subsequently, the end 23 of terminal 2 is passed through the through-hole 411 of each PCB pad 41, so that the positioning sleeve 28 is completely embedded in the through-hole 411. This allows the end 23 of terminal 2 to be fixed to the PCB pad 41 by electroplating tin. The positioning sleeve 28 is made of plastic or rubber. Using plastic has the advantage of low raw material cost and provides good assembly precision between the positioning sleeve 28 and the through-hole 411 of the PCB pad 41. The plastic material provides elasticity, allowing for a tighter fit between the positioning sleeve 28 and the through-hole 411 of the PCB pad 41. The positioning sleeve 28 is detachably mounted to the end 23 of terminal 2, allowing the positioning sleeve 28 to be installed on each end 23 of terminal 2. This allows for free control over the number of positioning sleeves 28 installed and their position on the connector structure, improving assembly flexibility.

[0029] Reference Figure 14 A housing 5 is integrally formed at the bottom of the fixing base 1, so that the connecting rods 21 of each terminal 2 are located inside the housing 5, and the height of the housing 5 is slightly larger than the height of the connecting rods 21 of the terminal 2. When it is necessary to mount and solder the terminals 2 of the connector structure to the PCB pads 41 of the PCB board 4, the housing 5 provides a gripping part for the connector structure, so as to facilitate the installation between the connector structure and the PCB board 4. In addition, a number of grooves 51 are formed around the surface of the housing 5. The grooves 51 increase the friction between the hand and the housing 5, thereby making the grip of the housing 5 more secure.

[0030] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, shall be protected by the present invention.

Claims

1. A connector structure, one end of which is electrically connected to a PCB board, characterized in that: The connector structure includes a fixed base and multiple terminals. Each terminal, from one end to the other, includes a connecting rod, a fixing rod, a positioning rod, and an end portion in sequence. A first stepped surface is provided between the connecting rod and the fixed rod, a second stepped surface is provided between the fixed rod and the positioning rod, and a third stepped surface is provided between the positioning rod and the end, and the outer perimeter of the positioning rod is larger than the outer perimeter of the end. The fixing rod is embedded in the fixing seat and integrally formed with the fixing seat. The positioning rod is used to be inserted into the through hole of the PCB board.

2. The connector structure according to claim 1, characterized in that: The third stepped surface is lower than the top surface of the through hole on the PCB board.

3. The connector structure according to claim 1, characterized in that: The positioning rod is integrally formed, or the positioning rod is composed of a positioning sleeve fitted at the end, and the positioning sleeve is made of plastic or rubber material.

4. The connector structure according to claim 1, characterized in that: The terminal is provided in seven parts, and each terminal is centrally symmetrically distributed.

5. A connector structure according to claim 4, characterized in that: The cross-section of the positioning rod portion of some of the multiple terminals is non-circular.

6. A connector structure according to claim 1, characterized in that: The end is soldered to the PCB pads on the PCB board using electroplating tin.

7. A connector structure according to claim 1, characterized in that: The end furthest from the fixed rod is rounded.

8. A connector structure according to claim 1, characterized in that: The bottom end of the fixing base is integrally provided with a housing, the connecting rod of each terminal is located inside the housing, and the surface of the housing is formed with several grooves.

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