Terminal assembly capable of preventing terminal from warping and scraping and card connector thereof

Abstract

The utility model discloses a terminal assembly capable of preventing a terminal from warping and scraping and a card connector thereof. The terminal assembly comprises an insulating body, a plurality of terminals and a plurality of terminals, the plurality of terminals are fixedly held on the insulating body through integral injection molding, and each terminal comprises a fixed part, an elastic part and a welding part; the terminal accommodating holes are formed by penetrating positions, corresponding to the elastic parts, of the insulating body along the vertical direction, and parts of the elastic parts protrude out of the upper surface of the insulating body to form contact parts; the free end of the elastic part obliquely extends downwards to form a terminal head part; the terminal receding grooves are formed in the insulation body and located at the front end positions of the terminal heads, and the terminal containing holes are separated from the adjacent terminal receding grooves through separation parts; the spacing part comprises a pressing part which covers the upper surface of the terminal head part and a sliding guide part which is attached to the lower surface of the terminal head part. The problem that the head of the terminal is warped and scratches a butt-joint electronic card can be solved.

Description

Technical Field

[0001] The present application relates to a terminal assembly and a card connector thereof which can prevent the terminal from warping and scratching. Background Art

[0002] For related prior art, please refer to Chinese invention patent publication No. CN111193123A, which mainly discloses a terminal assembly, including 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 insulating body penetrates along the thickness direction to form a terminal hole, one end of the docking portion is integrally connected to the fixing portion and at least partially protrudes into the terminal hole, and the docking portion is in the shape of a long simply supported beam, and the docking portion protrudes out of the insulating body in the thickness direction of the insulating body at the middle position in the length direction, and the insulating body also forms a limiting portion, wherein the limiting portion is at least partially supported on the upper surface of the other end of the docking portion, and the lower surface of the other end of the docking portion is not supported.

[0003] The above-mentioned prior art solution can realize the integral molding of the terminal and the insulating body. Specifically, when the terminal assembly is assembled and fixed to the surface of the circuit board, when cooperating with the docking electronic card to realize the function, the second bending portion 234 of the docking portion 23 will be pressed down, and the limiting arm 235 at the free end of the docking portion 23 will be passively displaced downward and contact the docking circuit board, and then the docking portion 23 will extend downward and toward the free end. During this process, the limiting arm 235 will detach from the limiting portion 11 and slide on the surface of the docking circuit board. In actual product use, it was found that the sliding of the limiting arm 235 on the surface of the docking circuit board would scratch the surface of the circuit board, and debris would be generated in the process of sliding and scratching to contaminate the circuit board and cause defects.

[0004] Related prior art can also refer to China Utility Model Patent Announcement No. CN205264940U, which discloses a docking electronic card connector. For details, please refer to the attached manual. Figure 4 , Figure 5 Combined with the text description of the specific implementation method of the specification, the upper and lower surfaces of the end of the elastic arm 42 of the terminal are respectively covered with a pressing block 112 and a sliding guide 111, and the end of the elastic arm 42 is correspondingly accommodated in the receiving groove 110, but it can be noted that the receiving groove 110 is a through groove that runs through from top to bottom. The purpose of such design is to make it easier to position the terminal during integral molding. However, during the actual use of the product, after the elastic arm 42 is pressed down, the end of the elastic arm 42 will slide forward and tilt upward and protrude upward from the receiving groove 110. Although the problem of the end of the elastic arm 42 scraping downward against the docking circuit board is basically solved, the end of the elastic arm 42 that tilts upward and exceeds the receiving groove 110 will scrape the lower surface of the docking electronic card and even cause a risk of short circuit.

[0005] Related prior art can also refer to China Invention Patent Publication No. CN110165449A, which discloses a terminal assembly and a card connector. For details, please refer to the attached specification. Figure 5 Combined with the text description of the specific implementation method of the specification, the upper and lower surfaces of the terminal head 222 are covered with the mortgage part 1051 and the guide slide part 1052, and the terminal clearance groove 104 arranged in front of the terminal head 222 is designed to be closed upward and open downward. In this way, on the one hand, one-piece injection molding can be achieved, and more importantly, when the terminal head 222 slides forward and tilts upward, it can prevent the terminal head 222 from protruding upward and scratching the docking electronic card. However, in the actual use of the product, it was found that the closed plastic layer above the terminal clearance groove 104 would produce debris and contaminate the circuit board after being scratched and pried by the terminal head 222 for many times, resulting in defects. After multiple scratches and pries, it was even broken by the top.

[0006] Therefore, it is urgent to design a new terminal assembly and electrical connector to solve the above technical problems. Utility Model Content

[0007] The purpose of the present application is to provide a terminal assembly and a card connector thereof that can prevent terminal warping and scratching, so as to improve the problem of terminal head warping and scratching with a mating electronic card.

[0008] To achieve the above objectives, this application provides the following technical solutions:

[0009] A terminal assembly for preventing terminal warping and scratching, used for fixing to a pair of mating circuit boards and a pair of mating electronic cards, comprising:

[0010] An insulating body, defined with an upper surface and a lower surface;

[0011] A plurality of terminals are fixed on the insulating body by integral injection molding, each terminal comprising a fixing portion fixed to the insulating body, an elastic portion extending from the fixing portion, and a welding portion integrally connected to the fixing portion and correspondingly exposed outside the insulating body for connecting to a docking circuit board;

[0012] The terminal receiving hole is formed by the insulating body corresponding to the position of each elastic part in the up-down direction, and the elastic part extends upward from the terminal receiving hole and partially protrudes from the upper surface of the insulating body to form a contact part for contacting the docking electronic card;

[0013] The free end of the elastic part extends obliquely downward to form a terminal head;

[0014] A terminal clearance groove is formed in the insulating body and located at the front end of the terminal head, the terminal receiving hole and the adjacent terminal clearance groove are separated by a spacing portion, and the spacing portion is a part of the insulating body;

[0015] The spacer portion includes a pressing portion covering the upper surface of the terminal head and a sliding guide portion attached to the lower surface of the terminal head.

[0016] Furthermore, the cross section of the pressing portion is a right-angled trapezoid, and the cross section of the sliding guide portion is a right-angled trapezoid.

[0017] Furthermore, an angle between a lower surface of the terminal head and a lower surface of the insulating body is not less than 3 degrees and not more than 12 degrees.

[0018] Furthermore, along the extension direction of the terminal head, the guide sliding portion is located in the middle position of the lower surface of the terminal head, the pressing portion is closer to the free end of the terminal head than the guide sliding portion, and the projections of the guide sliding portion and the pressing portion in the up and down directions overlap.

[0019] Furthermore, the connection position between the lower surface of the terminal head and the lower surface of the elastic portion is defined as an inflection point;

[0020] When the elastic portion is pressed down to the limit position and is in a working state, and when the elastic portion is not pressed down and is in an initial state, the inflection point portion is always located on the same side of the guide slide portion without crossing the guide slide portion.

[0021] Furthermore, when the elastic portion is pressed downward, the higher support point formed between the longer bottom edge and the oblique edge of the guide slide portion will be deformed due to the downward pressure of the terminal head;

[0022] When the elastic portion is pressed downward, the lower support point formed between the longer bottom side and the oblique side of the pressing portion will be deformed due to the upward warping of the terminal head.

[0023] Furthermore, the terminal clearance groove is formed by penetrating the insulating body in the up-down direction, or the terminal clearance groove is a groove structure that is recessed upward from the lower surface of the insulating body and does not penetrate the upper surface.

[0024] Furthermore, the free end of the terminal head is transversely widened to form a barb structure, and the barb structure is correspondingly buried in the spacing portion or protrudes into the terminal yielding groove.

[0025] To achieve the above objectives, the present application also provides the following technical solutions:

[0026] A card connector comprises a terminal assembly for preventing terminal warping and scratching as described in any one of the above items and a metal shell module matched with the terminal assembly, wherein the metal shell module and the terminal assembly together form a card insertion space for accommodating a docking electronic card.

[0027] Compared with the prior art, the beneficial effect of the present application is that it can improve the problem of the terminal head being warped and scratched against the docking electronic card. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of a terminal assembly for preventing terminal warping and scratching according to the present application.

[0029] Figure 2 yes Figure 1 A three-dimensional schematic diagram of a terminal assembly for preventing terminal warping and scratching as viewed from another angle is shown in FIG.

[0030] Figure 3 yes Figure 1 An exploded view of a terminal assembly that prevents terminal warping and scratching is shown in FIG.

[0031] Figure 4 yes Figure 1 A top view of a terminal assembly that prevents terminal warping and scratching is shown in FIG.

[0032] Figure 5 It is Figure 4 Section view along line AA.

[0033] Figure 6 yes Figure 5 A magnified view of the structure within the dashed box. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "assembly", "connection", and "connection" 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 present invention can be understood according to specific circumstances.

[0036] In the description of this application, it should be understood that the terms "include" and "have" 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.

[0037] In addition, for the sake of accuracy of description, all directions involved in this application should be referred to as Figure 1 For reference, the direction of the X-axis is defined as the front-to-back direction, where the positive direction of the X-axis is the back; the direction of the Y-axis is defined as the up-down direction, where the positive direction of the Y-axis is the top; and the direction of the Z-axis is the left-to-right direction.

[0038] See also Figure 1 and Figure 6 As shown, the present application discloses a terminal assembly that prevents terminal warping and scratching, and the terminal assembly can be welded to a docking circuit board and used to transfer a docking electronic card to the circuit board. In this embodiment, the terminal assembly includes an insulating body 1 and a plurality of terminals 2 fixed on the insulating body 1. The plurality of terminals 2 are formed by stamping and bending a metal plate.

[0039] Specifically, the insulating body 1 is plate-shaped, and has an upper surface 101 and a lower surface 102 that are arranged opposite to each other. Along the up and down directions, six terminal receiving holes 103 and a plurality of terminal clearance grooves 104 are formed through the insulating body 1. The six terminal receiving holes 103 are arranged in two rows along the front-to-back direction, and three terminal receiving holes 103 are arranged in each row. In the present application, one terminal clearance groove 104 is correspondingly arranged in front of five of the terminal receiving holes 103; and two terminal clearance grooves 104 are correspondingly arranged in front of the remaining terminal receiving hole 103. In this design, the arrangement of the terminals 2 meets the standards of the Nano SIM card.

[0040] Please refer to Figures 1 to 4 As shown, each terminal 2 includes a fixing portion 21 fixed to the insulating body 1, an elastic portion 22 extended from the fixing portion 21, and a welding portion 23 connected to the fixing portion 21 and correspondingly exposed outside the insulating body 1 for connecting to a docking circuit board. In the present application, the fixing portion 21 is embedded in the insulating body 1 by integral injection molding.

[0041] The terminal receiving hole 103 is formed by passing through the position of each elastic part 22 on the insulating body 1 in the up-down direction. The elastic part 22 extends upward from the terminal receiving hole 103 and partially protrudes from the upper surface 101 of the insulating body 1 to form a contact part 221. In a preferred embodiment, the elastic part 22 is roughly in a "︿" shape. The free end of the elastic part 22 extends downward obliquely to form a terminal head 222.

[0042] The terminal clearance groove 104 is formed in the insulating body 1 and is located at the front end of the terminal head 222. The terminal receiving hole 103 is separated from the adjacent terminal clearance groove 104 by a spacer 11, and the spacer 11 is a part of the insulating body 1. The spacer 11 includes a pressing portion 111 covering the upper surface of the terminal head 222 and a guide slide portion 112 attached to the lower surface of the terminal head 222. The pressing portion 111 extends in the left-right direction and is integrally provided with the insulating body 1 at both ends, and the guide slide portion 112 extends in the left-right direction and is integrally provided with the insulating body 1 at both ends.

[0043] Please refer to Figure 6 Combined with Figures 1 to 5 As shown, the cross section of the pressing portion 111 is a right-angled trapezoid, wherein the right-angled waist of the pressing portion 111 of the right-angled trapezoid is at the top, the oblique waist is at the bottom, along the front-to-back direction, the long bottom side with a longer length is close to the free end of the terminal head 222, and the short bottom side with a shorter length is away from the free end of the terminal head 222; the cross section of the guide slide portion 112 is a right-angled trapezoid, wherein the right-angled waist of the guide slide portion 112 of the right-angled trapezoid is at the bottom, the oblique waist is at the top, along the front-to-back direction, the long bottom side with a longer length is away from the free end of the terminal head 222, and the short bottom side with a shorter length is close to the free end of the terminal head 222. The oblique waist of the pressing portion 111 and the oblique waist of the guide slide portion 112 are respectively attached to the upper and lower surfaces of the terminal head 222.

[0044] Further, in the present application, preferably, the guide slide portion 112 is located at the middle position of the lower surface of the terminal head 222 along the extension direction of the terminal head 222, and the pressing portion 111 is located in front of the guide slide portion 112 along the extension direction of the terminal head 222 (the pressing portion 111 and the guide slide portion 112 are misaligned along the front-to-back direction, and the pressing portion 111 is in front). To ensure that the terminal 2 can slide effectively, the projections of the guide slide portion 112 and the pressing portion 111 along the up-down direction partially overlap. In the present application, the connection position of the lower surface 2221 of the terminal head 222 and the lower surface 2201 of the elastic portion 22 is defined as the inflection point portion 220.

[0045] When the elastic part 22 is pressed down (it may be pressed down by the docking electronic card), the terminal head 222 is supported by the guide slide part 112 and slides forward, and the terminal head 222 is separated from the combination with the guide slide part 112 and the pressing part 111 (when used for the first time); then, the higher support point 1121 formed between the longer long bottom side and the oblique waist of the guide slide part 112 will be deformed due to the downward pressure of the terminal head 222, and the lower support point 1111 formed between the longer long bottom side and the oblique side of the pressing part 111 will be deformed due to the upward warping of the terminal head 222. In the above deformation process, the inclined terminal head 222 is partially corrected so that the terminal head 222 tends to be horizontal, so as to absorb the displacement of the free end of the terminal head 222 warping upward during the forward movement, so that when the elastic part 22 is pressed down to the limit position, the free end of the terminal head 222 will not exceed the upper surface 101 of the insulating body 1 upward. In addition, preferably, when the elastic portion 22 is pressed down to the limit position and is in the working state, and when the elastic portion 22 is not pressed down and is in the initial state, the inflection point portion 220 is always located on the same side of the guide slide portion 112 and does not go over the guide slide portion 112. As a result, the lower surface 2221 of the terminal head 222 is always in contact with the oblique waist of the guide slide portion 112, thereby further ensuring that the free end of the terminal head 222 will not exceed the upper surface 101 of the insulating body 1 upward.

[0046] Please refer to Figure 6 As shown, in order to achieve a better effect, the angle between the lower surface of the terminal head 222 and the lower surface 101 of the insulating body 1 is not less than 3 degrees and not more than 12 degrees, and preferably not less than 5 degrees and not more than 10 degrees. Furthermore, in a preferred embodiment, the terminal clearance groove 104 is formed by penetrating the insulating body 1 in the up and down directions. In other embodiments, the terminal clearance groove 104 can also be designed as a groove structure that is recessed upward from the lower surface of the insulating body 1 and does not penetrate the upper surface, so as to prevent the free end of the secondary protection terminal head 222 from exceeding the upper surface 101 of the insulating body 1 upward.

[0047] Please refer to Figure 3 and Figure 4 As shown, in order to prevent the terminal head 222 from being pulled out of the spacer 11 , the free end of the terminal head 222 is laterally widened to form a barb structure, which is correspondingly buried in the spacer 11 or protrudes into the terminal clearance groove 104 .

[0048] The terminal assembly of the present application is actually an independent tofu block terminal assembly, which can be used to cooperate with an independent metal shell module to form a card connector together. Specifically, the terminal assembly is independently welded to the docking circuit board, and the metal shell module is covered on the terminal assembly and welded and fixed to the docking circuit board. There is no need for direct contact between the metal shell module and the terminal assembly. The metal shell module and the terminal assembly are spaced in the up and down direction to form a card insertion space for inserting a docking electronic card.

[0049] Of course, the terminal assembly can also be directly integrated on the metal shell module as a part of the metal shell module. In this embodiment, the insulating body 1 of the terminal assembly can be designed to be fitted and fixed to the lower surface (inner surface) of the metal shell to form a whole, and fixed to the docking circuit board by welding, and a card insertion space for inserting a docking electronic card is formed between the lower side of the insulating body 1 and the docking circuit board.

[0050] In the present application, by designing the terminal head 222 of the terminal 2 to be in a downwardly inclined extending shape, and combining the pressing portion 111, the sliding guide portion 112 and the terminal clearance groove 104, it is achieved that when the elastic portion 22 of the terminal 2 is pressed downward, the terminal head 222 will not be excessively warped upward and protrude above the upper surface of the insulating book 1, which can improve the problem of the terminal head warping and scratching with the docking electronic card.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0052] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A terminal assembly for preventing terminal warping and scratching, used for fixing to a pair of mating circuit boards and contacting a pair of mating electronic cards, comprising: An insulating body, defined with an upper surface and a lower surface; A plurality of terminals are fixed on the insulating body by integral injection molding, each terminal comprising a fixing portion fixed to the insulating body, an elastic portion extending from the fixing portion, and a welding portion integrally connected to the fixing portion and correspondingly exposed outside the insulating body for connecting to a docking circuit board; The terminal receiving hole is formed by the insulating body passing through the position of each elastic part in the up-down direction, and the elastic part extends upwardly and obliquely from the terminal receiving hole and partially protrudes from the upper surface of the insulating body to form a contact part for contacting the docking electronic card; characterized in that: The free end of the elastic part extends obliquely downward to form a terminal head; A terminal clearance groove is formed in the insulating body and located at the front end of the terminal head, the terminal receiving hole and the adjacent terminal clearance groove are separated by a spacing portion, and the spacing portion is a part of the insulating body; The spacer portion includes a pressing portion covering the upper surface of the terminal head and a sliding guide portion attached to the lower surface of the terminal head.

2. The terminal assembly for preventing terminal warping and scratching according to claim 1, characterized in that: The cross section of the pressing portion is in the shape of a right-angled trapezoid, and the cross section of the sliding guide portion is in the shape of a right-angled trapezoid.

3. The terminal assembly for preventing terminal warping and scratching according to claim 1, characterized in that: An included angle between a lower surface of the terminal head and a lower surface of the insulating body is not less than 3 degrees and not more than 12 degrees.

4. The terminal assembly for preventing terminal warping and scratching according to claim 1, characterized in that: Along the extension direction of the terminal head, the guide slide portion is located in the middle position of the lower surface of the terminal head, the pressing portion is closer to the free end of the terminal head than the guide slide portion, and the projections of the guide slide portion and the pressing portion in the up and down directions overlap.

5. The terminal assembly for preventing terminal warping and scratching according to claim 1, characterized in that: The connection position between the lower surface of the terminal head and the lower surface of the elastic portion is defined as an inflection point; When the elastic portion is pressed down to the limit position and is in a working state, and when the elastic portion is not pressed down and is in an initial state, the inflection point portion is always located on the same side of the guide slide portion without crossing the guide slide portion.

6. The terminal assembly for preventing terminal warping and scratching according to claim 2, characterized in that: When the elastic part is pressed downward, the higher support point formed between the longer bottom side and the oblique side of the guide slide part will be deformed due to the downward pressure of the terminal head; When the elastic portion is pressed downward, the lower support point formed between the longer bottom side and the oblique side of the pressing portion will be deformed due to the upward warping of the terminal head.

7. The terminal assembly for preventing terminal warping and scratching according to any one of claims 1 to 6, characterized in that: The terminal clearance groove is formed by penetrating the insulating body in the up-down direction, or the terminal clearance groove is a groove structure that is recessed upward from the lower surface of the insulating body and does not penetrate the upper surface.

8. The terminal assembly for preventing terminal warping and scratching according to any one of claims 1 to 6, characterized in that: The free end of the terminal head is transversely widened to form a barb structure, and the barb structure is correspondingly buried in the spacing portion or protrudes into the terminal clearance groove.

9. A card connector, characterized in that: It comprises a terminal assembly for preventing terminal warping and scratching as claimed in any one of claims 1 to 8 and a metal shell module matched with the terminal assembly, wherein the metal shell module and the terminal assembly together form a card insertion space for accommodating a docking electronic card.

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