Terminal assembly and electrical connector thereof

Abstract

A terminal assembly includes an insulating body and a plurality of terminals, wherein the plurality of terminals are integrally fixed to the insulating body by injection molding, and each of the terminals includes a fixing portion buried in the insulating body, a connecting portion extending from the fixing portion out of the insulating body, and a docking portion, wherein the connecting portion contacts with a docking connector, and the docking portion contacts with a circuit board, and a local position of the insulating body is recessed to form a glue-stopping groove, and the glue-stopping groove is used to slow down the flow rate of the colloid at the corresponding position during injection molding, and has better structural stability.

Description

[Technical field]

[0001] The present application relates to a terminal assembly and an electrical connector thereof. [Background technology]

[0002] SIM card (Subscriber Identification Module), also known as user identity card, smart card, GSM digital mobile phone must be installed with this card before it can be used. SIM card can store digital mobile phone customer information, encryption keys and user phone book, etc., which can be used for GSM network customer identity authentication and encrypt customer voice information during calls.

[0003] On November 14, 2017, the Chinese utility model patent CN206639960U was announced. The utility model patent application discloses a SIM card connector, including an insulating body and a plurality of conductive terminals fixed in the insulating body by integral molding, the insulating body is formed with an upper surface and a lower surface arranged oppositely, the conductive terminal includes a fixing portion fixed to the insulating body, an elastic portion extending from the fixing portion and protruding upward from the upper surface of the insulating body, and a corresponding welding portion connected to the fixing portion and exposed outside the insulating body. The structure of this type of card connector is relatively simple. When such a card connector is injection molded, a plurality of glue inlets are generally provided. However, the design of the plurality of glue inlets will form a binding position where the colloid flows and combines after injection molding. The binding position is generally a position where the strength of the insulating body is relatively weak after injection molding (because the temperature of the molten plastic fluid will decrease during the process of flowing and filling after entering the glue inlet, and there will be a certain temperature difference between the two streams of colloid flowing from two different directions, which reduces the binding strength of the binding position). In some design solutions, there is a method of designing only one glue inlet, but even with one glue inlet, the formation of the bonding position cannot be avoided. Therefore, how to effectively control the formation position of the bonding position is of great significance to the strength of the entire card connector.

[0004] Therefore, it is necessary to provide a terminal assembly and an electrical connector thereof to overcome the above-mentioned defects. [Summary of the invention]

[0005] The purpose of the present application is to provide a terminal assembly and an electrical connector thereof, which have better structural stability.

[0006] The purpose of this application is achieved through the following technical solutions:

[0007] A terminal assembly includes an insulating body and a plurality of terminals. The plurality of terminals are integrally fixed to the insulating body by injection molding. Each terminal includes a fixing portion buried in the insulating body, a connecting portion extending out of the insulating body from the fixing portion, and a docking portion. The connecting portion is correspondingly in contact with a docking connector, and the docking portion is correspondingly in contact with a circuit board. A glue stopping groove is formed by a local depression of the insulating body, and the glue stopping groove is used to slow down the flow rate of the glue at the corresponding position during injection molding.

[0008] Further, the insulating body is in a shape of a Chinese character 'Ri' and is formed with two receiving holes, including a first fixing wall, a second fixing wall, a first end wall connecting one ends of the first fixing wall and the second fixing wall, a second end wall connecting the other ends of the first fixing wall and the second fixing wall, and a middle wall connecting the middle positions of the first fixing wall and the second fixing wall. A glue inlet formed by the glue during injection molding is at a local position of the middle wall, and the glue stopping groove is located on the first fixing wall and / or the second fixing wall.

[0009] Further, the glue stopping groove is located at a position close to the middle wall. A combining position is formed at the connecting position of one end of the first fixing wall of the insulating body and the first end wall, and a combining position is formed at the connecting position of one end of the second fixing wall of the insulating body and the second end wall.

[0010] Further, an upper glue stopping groove is formed by a downward depression of the upper surface of the insulating body, and a lower glue stopping groove is formed by a depression at a position corresponding to the upper glue stopping groove on the lower surface of the insulating body. The upper glue stopping groove and the corresponding lower glue stopping groove together form the glue stopping groove.

[0011] Further, the glue stopping groove is recessed inward from the upper surface and / or the lower surface of the insulating body and is in a communicating shape with the receiving hole.

[0012] Further, at least one receiving hole corresponds to at least one glue stopping groove.

[0013] Further, a glue stopping groove is formed at each of the connecting positions of the two ends of the middle wall with the first fixing wall and the second fixing wall. The glue stopping groove located at one end of the middle wall is only communicated with one receiving hole, and the glue stopping groove located at the other end of the middle wall is only communicated with the other receiving hole.

[0014] Further, the thickness of the insulating body at the positions of the two glue stopping grooves opposite in the up-and-down direction is the same as the thickness of the fixing portion of the terminal, and the fixing portion of at least one terminal is exposed into the glue stopping groove.

[0015] Further, a plurality of terminals are arranged in two rows and fixed in the first fixing wall and the second fixing wall, and the docking portions of each terminal respectively protrude into the two receiving holes.

[0016] The object of the present application is also achieved by the following technical solutions:

[0017] An electrical connector comprises a terminal assembly as described in any one of the above.

[0018] Compared with the prior art, the present application has the advantages of: better structural stability.

Brief Description of the Drawings

[0019] Figure 1 It is a three-dimensional schematic diagram of the terminal assembly of the present application;

[0020] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the terminal assembly shown in FIG. 1 as viewed from another angle;

[0021] Figure 3 It is a three-dimensional exploded schematic diagram of the terminal assembly of the present application, specifically showing a three-dimensional schematic diagram after the insulation body and the terminal are separated;

[0022] Figure 4 yes Figure 1 Section view from line AA.

[0023] Figure 5 It is a bottom view of the terminal assembly of the present application. [Specific implementation method]

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the application can be combined with each other. The application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0025] In the description of the application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the application can be understood according to specific circumstances.

[0026] In the description of the application, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0027] In order to ensure the accuracy of the full text, all directions involved should be referred to as Figure 1For reference, the extending direction of the X-axis is defined as the left-right direction, where the positive direction of the X-axis is to the right; the extending direction of the Y-axis is defined as the front-back direction, where the positive direction of the Y-axis is to the front; the extending direction of the Z-axis is defined as the up-down direction, where the positive direction of the Z-axis is up.

[0028] Please refer to Figures 1 to 5 As shown, the present application discloses a terminal assembly, including an insulating body 1 and a plurality of terminals 2. The plurality of terminals 2 and the insulating body 1 are integrally fixed by injection molding. Each of the terminals 2 includes a fixing portion 21 buried in the insulating body 1, a connecting portion 22 extending out of the insulating body 1 from the fixing portion 21, and a docking portion 23. The connecting portion 22 is correspondingly in contact with a docking connector (not shown). The docking portion 23 is correspondingly in contact with a circuit board (not shown). A glue stopping groove 10 is formed by local depression of the insulating body 1, and the glue stopping groove 10 is used to slow down the flow rate of the glue at the corresponding position during injection molding.

[0029] The terminal assembly of the present application is used to be fixed to a circuit board and can cooperate with a metal housing (not shown) to form an electrical connector. Specifically, the metal housing can be sleeved around the terminal assembly. The metal housing and the terminal assembly jointly define an insertion card space (not shown), and the connecting portion 22 extends obliquely upward into the insertion card space in a cantilever shape. The insertion card space is used to accommodate an electronic card (not shown) or a card holder (not shown) carrying an electronic card. Of course, in some embodiments, a card ejection mechanism (not shown) can also be integrated on the metal housing, and the card ejection mechanism is used to eject the electronic card or the card holder inserted into the insertion card space. The structure of the card ejection mechanism is a well-known technology and will not be described in detail here.

[0030] Please refer to Figures 1 to 3 As shown, the insulating body 1 is in a figure-eight shape and is formed with two accommodating holes 101, including a first fixing wall 11, a second fixing wall 12, a first end wall 13 connecting one ends of the first fixing wall 11 and the second fixing wall 12, a second end wall 14 connecting the other ends of the first fixing wall 11 and the second fixing wall 12, and an intermediate wall 15 connecting the middle positions of the first fixing wall 11 and the second fixing wall 12. A glue inlet 102 formed by injecting glue during injection molding is provided at a local position of the intermediate wall 15, and the glue stopping groove 10 is located on the first fixing wall 11 and / or the second fixing wall 12.

[0031] Specifically, the glue stopping groove 10 is located at a position close to the intermediate wall 15. An upper glue stopping groove 1001 is formed by downward depression of the upper surface of the insulating body 1, and a lower glue stopping groove 1002 is formed by depression at a position corresponding to the upper glue stopping groove 1001 on the lower surface of the insulating body 1. The upper glue stopping groove 1001 and the corresponding lower glue stopping groove 1002 jointly form the glue stopping groove 10.

[0032] Please refer to Figures 2 to 4 As shown, the glue stop groove 10 is formed by the upper surface and / or the lower surface of the insulating body 1 being recessed inwardly, and is connected to the receiving hole 101. Specifically, the upper glue stop groove 1001 is connected to the receiving hole 101, and the lower glue stop groove 1002 is also connected to the receiving hole 101. One receiving hole 101 corresponds to at least one glue stop groove 10. Specifically in the embodiment of the present application, a glue stop groove 10 is formed at each of the two ends (the two ends in the left and right directions) of the middle wall 15 and the connection positions with the first fixed wall 11 and the second fixed wall 12, wherein the glue stop groove 10 located at one end of the middle wall 15 is only connected to one receiving hole 101, and wherein the glue stop groove 10 located at the other end of the middle wall 15 is only connected to the other receiving hole 101.

[0033] The terminal assembly structure design in the present application can make the molten plastic fluid poured through the glue inlet 102 fill the middle wall 15, and then flow from the two ends of the middle wall 15 to the front and rear directions to form the first fixed wall 11 and the second fixed wall 12, and finally fill to form the first end wall 13 and the second end wall 14. In this process, in the process of flowing from the left end of the middle wall 15 to the front and rear directions to form the first fixed wall 11, due to the design of the glue stop groove 10, the speed of the molten plastic flowing upward is greater than the speed of flowing downward. Similarly, in the process of flowing from the right end of the middle wall 15 to the front and rear directions to form the second fixed wall 12, due to the design of the glue stop groove 10, the speed of the molten plastic flowing upward is less than the speed of flowing downward. Finally, the first end wall 13 is formed by the molten plastic flowing upward through the left end of the middle wall 15, and the second end wall 14 is formed by the molten plastic flowing downward through the right end of the middle wall 15, and then, the combination position 111 and the combination position 112 formed after the molten plastics meet are located at the two end angles of the entire insulating body 1. The binding sites 111 and 112 in this application are specifically referred to as Figure 5 shown.

[0034] It should be noted that Figure 5 The arrow lines shown on the insulating body 1 are only for indicating the flow direction of the molten plastic, and the number of arrow lines is only for indicating the flow amount of the molten plastic. The proportional relationship of the number does not represent a specific flow amount ratio.

[0035] Since the terminal assembly in the present application is combined with the fixing portion 21 of the terminal 2 inside the end angle position of the insulating body 1, the setting of the stopper groove 10 allows the combination positions 111 and 112 of the molten plastic to be formed at the two end angle positions of the insulating body 1, which can effectively increase the overall structural strength of the entire terminal assembly. The position design of the stopper groove 10 can effectively control the flow rate of the molten plastic.

[0036] Please refer to Figures 2 to 4 As shown, the thickness of the insulating body at the two opposite positions of the glue-stop grooves 10 in the up and down directions is the same as the thickness of the fixing portion 21 of the terminal 2, and the fixing portion 21 of at least one terminal 2 is exposed into the glue-stop groove 10, and the position of the glue-stop groove 10 can be used to fix the terminal 2 at the same time.

[0037] Please refer to Figures 1 to 5 As shown, a plurality of terminals 2 are arranged in two rows and fixed in the first fixing wall 11 and the second fixing wall 12, and the docking portion 23 of each terminal 2 protrudes into the two receiving holes 101. The terminal arrangement of the terminal assembly of the present application complies with the arrangement standard of the Nano SIM card.

[0038] The above descriptions are only some embodiments of the present application, not all embodiments. Any equivalent changes made to the technical solution of the present application by ordinary technicians in this field after reading the specification of the present application are covered by the claims of the present application.

Claims

1. A terminal assembly, characterized in that: It comprises an insulating body and a plurality of terminals, wherein the plurality of terminals are fixed integrally with the insulating body by injection molding, each of the terminals comprises a fixing portion embedded in the insulating body, a connecting portion and a docking portion extending from the fixing portion out of the insulating body, wherein the connecting portion contacts with a docking connector, and the docking portion contacts with a circuit board, and a local position of the insulating body is recessed to form a glue-stopping groove, and the glue-stopping groove is used to slow down the flow rate of the colloid at the corresponding position during injection molding; The insulating body is formed with two accommodating holes, including a first fixed wall, a second fixed wall, a first end wall connecting one end of the first fixed wall and the second fixed wall, a second end wall connecting the other end of the first fixed wall and the second fixed wall, and an intermediate wall connecting the middle position of the first fixed wall and the second fixed wall, and a local position of the intermediate wall is formed by the injection of glue during injection molding; The glue-stopping groove is formed on the first fixed wall, and the glue-stopping groove is close to one of the two receiving holes; The glue-stopping groove is formed on the second fixed wall and is close to the other of the two accommodating holes.

2. The terminal assembly according to claim 1, characterized in that: The glue stopping groove is located near the middle wall, the first fixed wall of the insulating body forms a combination position at the connection position of one end of the first end wall, and the second fixed wall of the insulating body forms a combination position at the connection position of one end of the second end wall.

3. The terminal assembly according to claim 1, characterized in that: The upper surface of the insulating body is recessed downward to form an upper glue stop groove, and the lower surface of the insulating body is recessed at a position corresponding to the upper glue stop groove to form a lower glue stop groove. The upper glue stop groove and the corresponding lower glue stop groove together form the glue stop groove.

4. The terminal assembly according to claim 1, characterized in that: The glue-stopping groove is recessed inward from the upper surface and / or the lower surface of the insulating body and is connected to the accommodating hole.

5. The terminal assembly according to claim 4, characterized in that: One of the accommodating holes corresponds to at least one of the glue-stopping grooves.

6. The terminal assembly according to claim 5, characterized in that: The two ends of the middle wall and the connection positions with the first fixed wall and the second fixed wall each form a glue-stop groove, wherein the glue-stop groove at one end of the middle wall is only connected to one accommodating hole, and the glue-stop groove at the other end of the middle wall is only connected to the other accommodating hole.

7. The terminal assembly according to claim 3, characterized in that: The thickness of the insulating body at the positions of the two glue-stopping grooves opposite to each other in the up-down direction is the same as the thickness of the fixing portion of the terminal, and the fixing portion of at least one terminal is exposed in the glue-stopping groove.

8. The terminal assembly according to claim 1, characterized in that: A plurality of terminals are arranged in two rows and fixed in the first fixed wall and the second fixed wall, and the butting portion of each terminal protrudes into the two accommodating holes respectively.

9. An electrical connector, comprising the terminal assembly according to any one of claims 1 to 8.

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