Sinking plate type connector

Abstract

The utility model relates to a sinking plate type connector, and belongs to the technical field of electric connectors. The connector comprises a plastic shell, a terminal and an end cover. Terminal holes are formed in the plastic shell in the front-back direction, the terminals are fixed in the terminal holes, and pins are arranged at the rear ends of the terminals; the end cover is installed at the rear end of the plastic shell. A first positioning structure is arranged between at least one terminal and the end cover, a second positioning structure is arranged between the end cover and the plastic shell, and the end cover is fixed through the first positioning structure and the second positioning structure. The sinking plate type connector is reasonable in structural design, reliable in end cover fixation, stable in use performance and good in practicability.

Description

Technical Field

[0001] The utility model relates to a surface-mounted connector, belonging to the field of the structural design of electrical connectors. Background Art

[0002] The surface-mounted connector is a special type of electrical connector, playing an important role in electronic devices, especially in those applications that require high density and compact design. Its unique advantages make it an indispensable key connection device. The surface-mounted connector is characterized by occupying less vertical space on the circuit board, thus meeting the more compact design requirements. The surface-mounted connector can be installed vertically or horizontally on the circuit board to adapt to different design requirements, and is usually welded to the circuit board by the SMT process to achieve high-density installation.

[0003] When the surface-mounted connector is installed at the edge of the circuit board, it is usually necessary to punch a notch at the edge of the circuit board, place the surface-mounted connector in the notch, and spot-weld the pins of its upper terminals to the welding positions on the circuit board. However, since burrs will be generated at the edge of the notch after punching the notch on the circuit board, especially the burrs on the aluminum-based circuit board can conduct electricity. In order to prevent the terminals on the surface-mounted electrical connector from contacting the burrs and causing a short-circuit problem, it is necessary to install an end cover at the rear end of the surface-mounted connector. The end cover is made of insulating material, and a partition is formed between the notch and the terminals through the end cover, thus effectively avoiding the occurrence of short-circuit problems.

[0004] Since the surface-mounted connector is a type of connector with a small volume and a compact structure, special attention needs to be paid to the design of its end cover fixing structure. In the prior art, some end covers are fixed to the rear end of the plastic shell by fitting, and this method is difficult to effectively position the end cover, resulting in the problem that the end cover is likely to fall off. Summary of the Utility Model

[0005] In view of this, the utility model aims to provide a surface-mounted connector, which can effectively fix its end cover through structural optimization and prevent the problem of the end cover falling off.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] The utility model provides a surface-mounted connector, including a plastic shell, terminals and an end cover;

[0008] The plastic shell is provided with terminal holes arranged in the front-rear direction, the terminals are fixed in the terminal holes, and the rear ends of the terminals are provided with pins; the end cover is installed at the rear end of the plastic shell; at least one first positioning structure is arranged between the terminal and the end cover, and a second positioning structure is arranged between the end cover and the plastic shell, and the end cover is fixed through the first positioning structure and the second positioning structure.

[0009] In some embodiments, the end cap includes a main plate portion disposed in the up-and-down direction and an extension plate portion extending backward from the upper end edge of the main plate portion. The pin extends backward above the extension plate portion, and the end of the pin bends downward after extending beyond the rear edge of the extension plate portion to form a soldering leg.

[0010] In some embodiments, the first positioning structure includes a pin formed on the terminal and a socket formed on the end cap. When the end cap is installed in place, the pin is inserted into the socket in the up-and-down direction, and the up-and-down movement of the end cap is restricted by the second positioning structure, so that the pin and the socket remain in an inserted fit.

[0011] In some embodiments, a slot communicating with the rear end of the terminal hole is formed at the bottom of the rear end of the plastic shell. The pin protrudes downward, and a plug platform is formed at a position corresponding to the slot on the end cap, and the socket is disposed on the plug platform.

[0012] In some embodiments, a pressing block protruding upward is provided at the upper end of the plug platform, and the pressing block presses the terminal.

[0013] In some embodiments, the second positioning structure includes a clamping platform and a clamping groove. One of the clamping platform and the clamping groove is disposed on the plastic shell, and the other of the clamping platform and the clamping groove is disposed on the end cap. When the end cap is installed in place, the clamping platform is engaged with the clamping groove.

[0014] In some embodiments, a metal shell is sleeved outside the front end of the plastic shell, and a socket is formed between the metal shell and the plastic shell. The front end of the terminal has an elastic arm extending into the socket.

[0015] In some embodiments, a supporting boss protruding outward is provided at the rear end of the plastic shell, and a supporting welding leg protruding outward is provided on the metal shell.

[0016] In some embodiments, a limiting step for abutting against the rear end of the metal shell is formed on the outer side of the rear end of the plastic shell. A positioning hole disposed in the front-to-rear direction is provided on the limiting step. A positioning insertion piece protruding backward is provided at the rear end of the metal shell, and the positioning insertion piece is tightly inserted into the positioning hole.

[0017] The positive effects of the present utility model are as follows: Through structural optimization in the present utility model, a first positioning structure is provided between at least one terminal and the end cap, and a second positioning structure is provided between the end cap and the plastic shell. The end cap is fixed jointly by the first positioning structure and the second positioning structure, ensuring the firmness of the installation of the end cap on the plastic shell, thereby effectively preventing the end cap from falling off and ensuring the use performance of the product. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the surface-mounted connector in the present invention;

[0020] Figure 2 For Figure 1 Cross-sectional view of the flat surface-mounted connector shown in;

[0021] Figure 3 Exploded view of the surface-mounted connector in the present invention;

[0022] Figure 4 For Figure 3 Partial enlarged view of part A shown in;

[0023] Figure 5 Structural schematic diagram of the plastic housing in the present invention;

[0024] Figure 6 Structural schematic diagram when the surface-mounted connector, circuit board, and PCB board in the present invention are assembled.

[0025] Reference numerals shown in the figure: 1 - plastic housing; 11 - terminal hole; 12 - slot; 13 - support boss; 14 - limit step; 15 - positioning hole; 2 - terminal; 21 - pin; 22 - socket; 23 - elastic arm; 3 - end cap; 31 - main body plate part; 32 - extension plate part; 33 - jack; 34 - plug; 35 - pressing block; 4 - clamping table; 5 - clamping groove; 6 - metal housing; 61 - socket; 62 - support welding foot; 63 - positioning insert; 7 - PCB board. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0029] The structure of the surface-mounted connector provided in the embodiments of the present utility model is as Figures 1 to 5 shown, including a plastic shell 1, terminals 2 and an end cap 3; the plastic shell 1 serves as the installation carrier for the terminals 2. The plastic shell 1 is provided with terminal holes 11 arranged in the front-back direction, and the terminals 2 are fixed in the terminal holes 11. The rear end of the terminals 2 is provided with pins 21; the pins 21 are used to be welded to the conductive welding positions on the circuit board to achieve electrical connection with the circuit board. The end cap 3 is installed at the rear end of the plastic shell 1. When the surface-mounted connector is installed in the slot on the circuit board, the end cap 3 blocks between the terminals 2 and the side wall of the slot, preventing the burrs on the edge of the slot from contacting the terminals 2 and avoiding short-circuit problems.

[0030] In this embodiment, a first positioning structure is provided between the two terminals 2 and the end cap 3, and a second positioning structure is provided between the end cap 3 and the plastic shell 1. The end cap 3 is fixed through the first positioning structure and the second positioning structure. In this embodiment, by setting the first positioning structure, the terminals 2 and the end cap 3 are connected, and at the same time, by the second positioning structure, the end cap 3 and the plastic shell 1 are connected to ensure the firmness of the installation of the end cap 3, thereby effectively preventing the end cap 3 from falling off and ensuring the use performance of the product. In actual operation, a first positioning structure can also be provided between one terminal, three terminals or more terminals and the end cap 3 to ensure the stability of the installation of the end cap 3.

[0031] As Figure 2 and Figure 3As shown, the end cap 3 includes a main plate portion 31 arranged in the up-down direction and an extension plate portion 32 extending backward from the upper end edge of the main plate portion 31. The pin 21 extends backward above the extension plate portion 32, and the end of the pin 21 extends out of the rear edge of the extension plate portion 32 and then bends downward to form a welding foot. When the surface-mount connector is installed, the welding foot is spot-welded to the conductive welding position on the circuit board; through the main plate portion 31 and the extension plate portion 32, the end cap 3 can better block between the terminal 3 and the inner wall of the notch, improving the insulation protection ability of the end cap 3.

[0032] Optionally, in combination with Figure 1 and Figure 2 As shown, the first positioning structure includes a pin 22 formed on the terminal 2 and a jack 33 formed on the end cap 3. When the end cap 3 is installed in place, the pin 22 is inserted into and cooperates with the jack 33, and the insertion direction is in the up-down direction. The up-down movement of the end cap 3 is restricted by the second positioning structure, so that the pin 22 and the jack 33 maintain the insertion fit. Since the insertion direction of the pin 22 and the jack 33 is in the up-down direction, and at the same time the end cap 3 is positioned in the up-down direction by the second positioning structure, the end cap 3 is reliably installed and the assembly is convenient.

[0033] Optionally, in combination with Figure 4 and Figure 5 As shown, a slot 12 communicating with the rear end of the terminal hole 11 is opened at the bottom of the rear end of the plastic shell 1. The pin 22 protrudes downward, and a plug 34 is formed at the corresponding position on the end cap 3 for the slot 12. The jack 33 is arranged on the plug 34. When installing the end cap 3, it is inserted from the rear of the plastic shell 1 from bottom to top, so that the plug 34 is inserted into the slot 12, and at the same time the pin 22 is inserted into the jack 33, and the end cap 3 is positioned by the second positioning structure when inserted in place. Further, in order to strengthen the positioning of the terminal 3, a pressing block 35 protruding upward is provided at the upper end of the plug 34, and the pressing block 35 presses the terminal 2, thereby strengthening the positioning of the terminal 3.

[0034] Optionally, the second positioning structure includes a clamping platform 4 and a clamping groove 5. The clamping platforms 4 are arranged at the left and right ends of the end cap 3, and the clamping platforms 4 are arranged on both sides of the rear end of the plastic shell 1. When the end cap 3 is installed in place, the clamping platform 4 is engaged with the clamping groove 5, thereby positioning the end cap 3. As a deformed implementation, the clamping grooves 5 can also be arranged at the left and right ends of the end cap 3, and the clamping platforms 4 are correspondingly arranged on the left and right sides of the rear end of the plastic shell 1; or, a clamping platform 4 is arranged at the left end of the end cap 3 and a clamping groove 5 is arranged at the right end. Correspondingly, a clamping groove 5 is arranged on the left side of the rear end of the plastic shell 1, and a clamping platform 4 is arranged on the right side of the rear end of the plastic shell 1.

[0035] In some embodiments, a metal housing 6 is sleeved outside the front end of the plastic housing 1, and a socket 61 is formed between the metal housing 6 and the plastic housing 1. The front end of the terminal 2 has an elastic arm 23 extending into the socket 61. In this way, the surface-mount connector can be directly inserted and connected with the gold finger insert of the external PCB board 7. Specifically, the gold finger insert of the PCB board 7 is inserted into the socket 61, so that the elastic arm 23 contacts the conductive layer on the gold finger insert to achieve electrical connection. The strength of the electrical connector can be enhanced through the metal housing 6.

[0036] Referring to Figure 6 As shown, in order to increase the reliable fixation of the surface-mount connector on the circuit board, a support boss 13 protruding outward is provided at the rear end of the plastic housing 1, and a support welding leg 62 protruding outward is provided on the metal housing 6. After the surface-mount connector is installed in the notch of the circuit board, the support boss 13 is in contact with the surface of the circuit board, and at the same time, the side surface of the support welding leg 62 is in contact with the surface of the circuit board, so as to effectively support the surface-mount connector, enhance its compressive performance, and the reliability of fixing the surface-mount connector can also be strengthened by spot welding the support welding leg 62 to the fixed welding position on the circuit board.

[0037] Optionally, referring to Figure 3 As shown, a limiting step 14 for abutting against the rear end of the metal housing 6 is formed outside the rear end of the plastic housing 1. A positioning hole 15 is provided on the limiting step 14 and arranged in the front-rear direction. A positioning insert 63 protruding rearward is provided at the rear end of the metal housing 6. The positioning insert 63 is tightly inserted into the positioning hole 15, so that the metal housing 6 can be quickly and effectively fixed outside the plastic housing 1.

[0038] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A sunken plate type connector, comprising a plastic shell (1), a terminal (2) and an end cover (3); The plastic shell (1) is provided with a terminal hole (11) arranged in the front-to-back direction, the terminal (2) is fixed to the terminal hole (11), and a pin (21) is provided at the rear end of the terminal (2); the end cover (3) is installed at the rear end of the plastic shell (1); it is characterized in that: A first positioning structure is provided between at least one terminal (2) and the end cover (3), and a second positioning structure is provided between the end cover (3) and the plastic shell (1); the end cover (3) is fixed by means of the first positioning structure and the second positioning structure.

2. The sunken plate type connector according to claim 1, characterized in that: The end cover (3) comprises a main plate portion (31) arranged in the up-down direction and an extension plate portion (32) extending backward from the upper edge of the main plate portion (31); the pin (21) extends backward through the upper portion of the extension plate portion (32); and the end of the pin (21) extends out of the rear edge of the extension plate portion (32) and then bends downward to form a welding foot.

3. The sunken plate type connector according to claim 1, characterized in that: The first positioning structure comprises a plug pin (22) formed on the terminal (2) and a socket (33) formed on the end cover (3); when the end cover (3) is installed in place, the plug pin (22) and the socket (33) are plugged in and matched, and the plugging direction is the up-down direction; the up-down movement of the end cover (3) is restricted by the second positioning structure, so that the plug pin (22) and the socket (33) remain plugged in and matched.

4. The sunken plate type connector according to claim 3, characterized in that: The bottom of the rear end of the plastic shell (1) is provided with a slot (12) which communicates with the rear end of the terminal hole (11); the plug pin (22) protrudes downward; a plug platform (34) is formed on the end cover (3) at a position corresponding to the slot (12); and the plug hole (33) is arranged on the plug platform (34).

5. The sunken plate type connector according to claim 4, characterized in that: The upper end of the inserting platform (34) is provided with a pressing block (35) protruding upwards, and the pressing block (35) presses the terminal (2).

6. The sunken plate type connector according to any one of claims 1 to 5, characterized in that: The second positioning structure comprises a card platform (4) and a card slot (5), one of the card platform (4) and the card slot (5) being arranged on the plastic shell (1), and the other of the card platform (4) and the card slot (5) being arranged on the end cover (3), and the card platform (4) and the card slot (5) being engaged with each other when the end cover (3) is installed in place.

7. The sunken plate type connector according to claim 1, characterized in that: A metal shell (6) is sleeved on the outside of the front end of the plastic shell (1), and a socket (61) is formed between the metal shell (6) and the plastic shell (1). The front end of the terminal (2) has an elastic arm (23) extending into the socket (61).

8. The sunken plate type connector according to claim 7, characterized in that: The rear end of the plastic shell (1) is provided with a supporting boss (13) protruding outwards, and the metal shell (6) is provided with a supporting welding foot (62) protruding outwards.

9. The sunken plate type connector according to claim 6, characterized in that: A limiting step (14) is formed on the outer side of the rear end of the plastic shell (1) to abut against the rear end of the metal shell (6); a positioning hole (15) is provided on the limiting step (14) along the front-rear direction; a positioning insert (63) is provided at the rear end of the metal shell (6) and protrudes backward; the positioning insert (63) is tightly fitted and plugged into the positioning hole (15).

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