An electric connector and a signal transmission circuit

Abstract

The present application relates to the technical field of electrical connectors, and specifically provides an electrical connector and a signal transmission circuit, wherein the electrical connector comprises: a base, provided with a base body and two upper cover connecting parts; the two upper cover connecting parts are integrally formed and arranged on both sides of the base body; the base body is provided with a crossbeam, a shielding placement area and a bottom plate along the height direction; a first air avoidance groove is formed between the crossbeam and the shielding placement area; the shielding placement area is provided with a main bearing section, a bending section and a fixed section in sequence along the width direction; a shielding spring sheet is fixedly arranged on the shielding placement area; the shielding spring sheet is provided with a first limiting part, a shielding body, a plurality of bending parts, a plurality of second limiting parts and a plurality of grounding parts in sequence along the width direction; a plurality of grounding spring sheets and a plurality of flip cover spring sheets are provided in the shielding body, and the plurality of grounding spring sheets and the plurality of flip cover spring sheets are alternately arranged in the shielding body along the length direction; a unified grounding loop is formed, thereby improving the electromagnetic shielding effect.

Description

Technical Field

[0001] The present application relates to the technical field of electrical connectors, and in particular to an electrical connector and a signal transmission circuit. Background Art

[0002] A plug-in electrical connector is a commonly used electrical connector. A plug-in electrical connector is usually fixed to a printed circuit board by welding or other methods. Then, a flexible printed circuit board or a flexible flat cable is inserted into the plug-in electrical connector in a straight line to achieve an electrical connection between the flexible printed circuit board or the flexible flat cable and the printed circuit board. When an electrical connector is used in a signal transmission circuit, the signal transmission quality is easily interfered by external electromagnetic radiation. In order to suppress the interference of electromagnetic waves, a metal shielding shrapnel is usually added to the structure of the electrical connector. This metal shielding shrapnel is usually in the form of a thin plate, which is used to cover and shield the key parts of the connector to achieve the function of electromagnetic shielding.

[0003] However, in the prior art, since the metal shielding spring is relatively thin, the metal shielding spring is not fixed stably, and the metal shielding spring is a fully enclosed structure, which will limit the position of the grounding spring. As a result, the grounding springs connecting the electrical connector of the prior art and the metal shielding spring are usually distributed on both sides of the connector base. When the cables are pressed together, the shielding springs are easily deformed, which makes it difficult for the grounding springs to form an effective closed current loop, thereby reducing the overall electromagnetic shielding efficiency.

[0004] Therefore, the prior art has defects and shortcomings and needs further improvement and development. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present application aims to provide an electrical connector and a signal transmission circuit, aiming to solve the problem that the grounding springs of the prior electrical connectors are difficult to form an effective closed current loop, thereby reducing the overall electromagnetic shielding efficiency.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows: an electrical connector, comprising:

[0007] A base, wherein the base is provided with a base body and two upper cover connecting parts, the base body has a length direction and a width direction; the two upper cover connecting parts are integrally formed and arranged on both sides of the base body; the base body is provided with a crossbeam, a shielding placement area and a bottom plate along the height direction; the crossbeam is used to connect the two upper cover connecting parts, and a first air avoidance groove is formed between the crossbeam and the shielding placement area; the shielding placement area is provided with a main bearing section, a bending section and a fixing section in sequence along the width direction;

[0008] A shielding spring sheet, wherein the shielding spring sheet is fixedly arranged on the shielding placement area; the shielding spring sheet is sequentially provided with a first limiting portion, a shielding body, a plurality of bending portions, a plurality of second limiting portions and a plurality of grounding portions along the width direction; a plurality of grounding spring sheets and a plurality of cover spring sheets are arranged in the shielding body in an alternating manner along the length direction;

[0009] Among them, the first limiting portion is arranged in the first avoiding groove, and the first avoiding groove is used to limit the first limiting portion in the height direction; the shielding body is fitted with the main bearing section, and the plurality of bending portions are fitted with the bending section, and the plurality of second limiting portions are all fitted with the fixed section, and the fixed section is used to limit the plurality of second limiting portions in the height direction.

[0010] Optionally, the main bearing section and the bending section are provided with a plurality of grounding avoidance grooves, and the plurality of grounding avoidance grooves are arranged one-to-one correspondingly to the plurality of grounding spring sheets, and the width of the plurality of grounding spring sheets along the length direction is smaller than the width of the plurality of grounding avoidance grooves along the length direction.

[0011] Optionally, the horizontal heights of several of the grounding springs are lower than the plane height of the shielding body, and several of the grounding springs are used to contact the aluminum foil on the back of the cable to play a grounding role.

[0012] Optionally, the shielding body and the bent portions are provided with a plurality of lid-lifting grooves, the bottoms of the plurality of lid-lifting grooves are provided with lid-lifting spring pieces extending therefrom, and the horizontal heights of the lid-lifting spring pieces are all higher than the plane height of the shielding body.

[0013] Optionally, a plurality of T-shaped bosses are arranged in the fixing section, and the plurality of T-shaped bosses are arranged in a one-to-one correspondence in the plurality of flip cover grooves, and the plurality of T-shaped bosses are used to prevent the flip cover spring piece from being over-pressed and deformed;

[0014] The sides of the T-shaped bosses are all provided with stop grooves, the bottoms of the stop grooves are engaged with the sides of the second limiting portion, and the stop grooves are used to limit the shielding springs along the width direction.

[0015] Optionally, the plurality of grounding springs are each provided with a downward section, an arc section and an upward section, and a plurality of reinforcing protrusions are provided at one end of the arc section away from the base body;

[0016] A plurality of reinforcing ribs are arranged at one end of the downward section close to the base body, and the plurality of reinforcing ribs are used to prevent the downward section from being deformed.

[0017] Optionally, the electrical connector further comprises an upper cover and two fixing plates, the two fixing plates are respectively arranged in the upper cover connecting portion, both sides of the upper cover are provided with locking mechanisms, the locking mechanisms comprise a stop buckle and a pressing protrusion, a buckle through hole corresponding to the stop buckle is arranged in the base body, and the stop buckle is used to lock the flat cable when inserting the flat cable;

[0018] A plurality of abutment grooves are arranged at one end of the upper cover close to the base body, and the plurality of abutment grooves are arranged one-to-one corresponding to the flip cover spring pieces, and the plurality of abutment grooves are used to bear the resilience of the flip cover spring pieces to prevent the stop buckle from detaching from the buckle through hole.

[0019] Optionally, the pressing protrusion is provided with a self-locking through hole along the width direction, the fixing sheet is inserted into the self-locking through hole, and the fixing sheet is used to fix the pressing protrusion in the upper cover connecting portion; the bottom surface of the self-locking through hole is provided with a self-locking section and an unlocking section, and the angle between the tangent of the self-locking section and the unlocking section is set at an acute angle;

[0020] Among them, when the upper cover is in a self-locking state, the self-locking section abuts against the fixing plate, so that the upper cover is firmly fixed; when the upper cover is in a non-self-locking state, the unlocking section abuts against the fixing plate to limit the displacement of the upper cover.

[0021] Optionally, the electrical connector further comprises a plurality of connection terminals, which are arranged above the base plate along the length direction, and the connection terminals have a terminal contact portion and a terminal welding portion which are arranged opposite to each other, and a plurality of arc-shaped protrusions which are arranged at intervals are arranged in the terminal contact portion.

[0022] Another technical solution adopted by the present application to solve the technical problem is as follows: a signal transmission circuit, which includes the electrical connector as described above.

[0023] Beneficial effects:

[0024] The present application provides an electrical connector and a signal transmission circuit, wherein the electrical connector is tightly matched with the main bearing section, the bending section and the fixing section of the shielding placement area through the shielding spring sheet, so that the shielding spring sheet can be firmly fixed on the base; the grounding spring sheet and the flip cover spring sheet in the shielding body are alternately arranged in the length direction to form a unified grounding loop, optimize the shielding effect, provide more uniform and reliable electromagnetic shielding, and significantly improve the ability to suppress electromagnetic interference; the grounding spring sheet in the shielding spring sheet is in direct contact with the aluminum foil on the back of the cable to form a stable grounding connection, which not only effectively improves the electromagnetic shielding effect of the electrical connector, but also ensures that the electrical connector can maintain efficient signal transmission performance when facing external electromagnetic interference. By providing the first limiting portion, the bending portion and the second limiting portion, as well as the corresponding air avoidance groove, the bending section and the fixing section, the deformation of the shielding spring on the base is controlled, the displacement and deformation of the shielding spring are effectively avoided, and the long-term stability and reliability of the electromagnetic shielding of the electrical connector are ensured; the flip cover spring in the shielding spring provides an effective downward pressure rebound force for the upper cover, and the rebound force of the flip cover spring enables the upper cover to quickly return to its original position when unlocked, and the self-locking stability of the upper cover can be maintained when the cable is inserted; thereby, the shielding spring integrates four functions of grounding, fixing, downward pressure rebound and shielding electromagnetic interference, thereby forming a unified grounding loop, improving the overall electromagnetic shielding effect, and avoiding the problem of unstable grounding caused by deformation of the shielding spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the electrical connector provided in this application;

[0026] Figure 2 It is a three-dimensional exploded structural schematic diagram of the electrical connector provided in this application;

[0027] Figure 3 is a schematic diagram of the three-dimensional structure of the base body of the electrical connector provided in the present application;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the shielding spring of the electrical connector provided in the present application;

[0029] Figure 5 This application Figure 3 A schematic cross-sectional view along the Ⅰ-Ⅰ direction;

[0030] Figure 6 is a schematic diagram of the three-dimensional structure of the upper cover of the electrical connector provided in the present application;

[0031] Figure 7 is a rear view of the electrical connector provided in the present application;

[0032] Figure 8 This application Figure 7A schematic cross-sectional view along the II-II direction;

[0033] Fig. 9 This application Figure 7 Schematic cross-sectional view along the III-III direction.

[0034] Fig.10 It is a rear view of the upper cover of the electrical connector provided in the present application in a closed state.

[0035] Fig.11 This application Fig.10 Schematic cross-sectional view along the IV-IV direction.

[0036] Fig.12 This application Fig.10 Schematic cross-sectional view along the V-V direction.

[0037] Fig.13 It is a three-dimensional structural schematic diagram of the connecting terminal of the electrical connector of the present application.

[0038] Description of reference numerals:

[0039] 10. electrical connector; 11. base; 111. base body; 1111. crossbeam; 1112. shielding placement area; 1113. bottom plate; 1114. first air-avoiding groove; 1115. main bearing section; 1116. bending section; 1117. fixing section; 1118. grounding air-avoiding groove; 1119. T-shaped boss; 112. upper cover connecting part; 1120. stop groove; 1121. buckle through hole; 12. shielding spring; 121. first limit part; 122. shielding body; 1221. grounding spring; 1222. Flip cover spring piece; 1223, downward section; 1224, arc section; 1225, upward section; 123, bending portion; 124, second limiting portion; 125, grounding portion; 126, flip cover slot; 13, upper cover; 131, locking mechanism; 132, abutting groove; 1311, retaining buckle; 1312, pressing protrusion; 1313, self-locking through hole; 1314, self-locking section; 1315, unlocking section; 14, fixing sheet; 15, connecting terminal; 151, terminal contact portion; 1511, arc protrusion; 152, terminal welding portion. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0042] In the description of this 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 this application can be understood according to specific circumstances.

[0043] Please refer to Figures 1 to 3The first embodiment of the present application provides an electrical connector 10, which is used for a signal transmission circuit. The electrical connector 10 includes a base 11, a shielding spring 12, an upper cover 13 and two fixing plates 14. During the operation of the electrical connector 10, first, the user inserts a flexible printed circuit board or a flexible flat cable as a flat cable into a slot of the electrical connector 10 in a straight line, and the slot is located between the crossbeam 1111 of the base body 111 and the bottom plate 1113. A plurality of connection terminals 15 are arranged on the bottom plate 1113, and these connection terminals 15 are evenly distributed above the bottom plate 1113 along the length direction. When the flat cable is inserted, the terminal contact portion 151 of the connection terminal 15 contacts the conductive area on the flat cable to achieve effective signal transmission, thereby transmitting the signal of the flat cable to the printed circuit board. In order to effectively reduce electromagnetic interference and improve the electromagnetic shielding effect, a shielding spring 12 is arranged on the electrical connector 10, and the shielding spring 12 is fixed on the shielding placement area 1112 of the base body 111. The shielding spring sheet 12 is provided with a first limiting portion 121, a shielding body 122, a plurality of bending portions 123, a plurality of second limiting portions 124 and a plurality of grounding portions 125 along the width direction, and a plurality of grounding spring sheets 1221 and a plurality of cover spring sheets 1222 are provided in the shielding body 122. The plurality of grounding spring sheets 1221 are in direct contact with the aluminum foil on the back of the flat cable, and an effective grounding connection is formed by contacting with the aluminum foil, thereby providing an electromagnetic shielding function and reducing the interference of external electromagnetic radiation on the signal. The first limiting portion 121 of the shielding spring 12 is arranged in the first avoiding groove 1114 to ensure the stability of the shielding spring 12 in the height direction; the shielding body 122 is fitted with the main bearing section 1115, the bending portion 123 is fitted with the bending section 1116, and the second limiting portion 124 is fitted with the fixing section 1117 to ensure the stability of the shielding spring 12 in use, prevent deformation or loosening during the plugging process, thereby improving the stability of the shielding spring 12 in the plugging process, and at the same time enhance the anti-deformation ability of the shielding spring 12, thereby improving the overall electromagnetic shielding performance. The upper cover 13 of the electrical connector 10 is fixed to both sides of the base body 111 through the upper cover connecting portion 112, and the fixing sheet 14 is fixed to the body through the upper cover connecting portion 112, providing a more secure fixation to prevent the upper cover 13 from loosening during use. The retaining buckle 1311 of the upper cover 13 automatically locks the cable to ensure that the cable is firmly fixed in the electrical connector; during the unlocking operation, the retaining buckle 1311 is lifted by pressing the upper cover 13 to complete the unlocking so that the cable can be pulled out, thereby greatly improving the stability of the upper cover 13 when pressing down and inserting the cable, while enhancing the pressure resistance and deformation resistance of the electrical connector 10, thereby improving the reliability and practicality of the electrical connector 10.

[0044] Please refer to Figures 4 to 5In some embodiments, the electrical connector 10 includes a base 11 and a shielding spring 12. The base 11 is used to be welded on a printed circuit board. The base 11 is provided with a base body 111 and two upper cover connecting parts 112. The base body 111 is used to provide mechanical protection and support for the connecting terminal 15; the base body 111 is also used for electrical insulation between the connecting terminals 15 and to protect the connecting terminals 15 from physical damage and environmental influences, thereby increasing the stability and service life of the connecting terminal 15; the two upper cover connecting parts 112 are both used to connect the upper cover 13; the base body 111 has a length direction and a width direction; the two upper cover connecting parts 112 are arranged on the base On both sides of the main body 111, the two upper cover connecting parts 112 are integrally formed with the base main body 111; the base main body 111 is provided with a crossbeam 1111, a shielding placement area 1112 and a bottom plate 1113 along the height direction; the crossbeam 1111 is used to connect the two upper cover connecting parts 112, thereby increasing the structural strength of the base main body 111, the shielding placement area 1112 is used to fix and place the shielding spring sheet 12, and the bottom plate 1113 is used to set the connecting terminal 15; a first avoidance groove 1114 is formed between the crossbeam 1111 and the shielding placement area 1112, and the first avoidance groove 1114 is arranged below the crossbeam 1111; the shielding placement area 1112 A main bearing section 1115, a bending section 1116 and a fixed section 1117 are sequentially arranged along the width direction; the shielding spring sheet 12 is fixedly arranged on the shielding placement area 1112; the shielding spring sheet 12 is sequentially arranged along the width direction with a first limiting portion 121, a shielding body 122, a plurality of bending portions 123, a plurality of second limiting portions 124 and a plurality of grounding portions 125; the shielding body 122 is used to cover and connect the terminal 15, further enhancing the electromagnetic shielding effect and reducing the influence of external electromagnetic interference on signal transmission; the plurality of bending portions 123 are used to make the shielding spring sheet 12 better fit the shielding placement area 1112, and the plurality of grounding portions 125 are used for grounding the electrical connector 10 ; The shielding body 122 is provided with a plurality of grounding spring pieces 1221 and a plurality of lift-cover spring pieces 1222. The plurality of grounding spring pieces 1221 are used to contact the aluminum foil on the back of the cable to play a grounding role; the plurality of lift-cover spring pieces 1222 are used to provide a rebound force to help the upper cover 13 maintain a stable position to prevent the cable from loosening or falling off during use, so that the shielding spring piece 12 integrates four functions of grounding, fixing, downward pressure rebound and shielding interference. The plurality of grounding spring pieces 1221 and the plurality of lift-cover spring pieces 1222 are alternately arranged in the shielding body 122 along the length direction, thereby effectively solving the problem of scattered layout of the grounding spring pieces 1221 in the prior art.The integrated layout of the grounding spring piece 1221 and the cover spring piece 1222 forms a unified grounding loop, improves the overall electromagnetic shielding effect, and avoids the problem of unstable grounding caused by deformation of the shielding spring piece 12; wherein, the first limiting portion 121 is arranged in the first avoiding groove 1114, and the first avoiding groove 1114 is used to limit the height direction of the first limiting portion 121; the shielding body 122 is arranged in close contact with the main bearing section 1115, and the plurality of bending portions 123 are arranged in close contact with the bending portions 1114. Segment 1116 is fitted together, and several of the second limiting portions 124 are fitted together with the fixed segment 1117. The fixed segment 1117 is used to limit the height direction of several of the second limiting portions 124, so that the shielding spring sheet 12 can be firmly fitted in the shielding placement area 1112, thereby improving the stability of the shielding spring sheet 12 when pressing down the upper cover 13 and inserting the cable, and at the same time enhancing the structural strength of the electrical connector 10, further enhancing the stability of the shielding spring sheet 12 and the electromagnetic shielding effect structure.

[0045] Please refer to Figures 4 to 5 In some embodiments, some of the grounding portions 125 are used for grounding the electrical connector 10, and fixed solder feet are correspondingly arranged below some of the grounding portions 125, so as to achieve a stable connection between the shielding spring 12 and the printed circuit board, improve the gripping force of the electrical connector 10 on the printed circuit board, and further form a unified grounding loop with the grounding spring 1221, thereby improving the overall electromagnetic shielding effect and avoiding unstable grounding caused by deformation of the shielding spring 12.

[0046] Please refer to Figures 4 to 5 In some embodiments, the main bearing section 1115 and the bending section 1116 are provided with a plurality of grounding avoidance grooves 1118, and the plurality of grounding avoidance grooves 1118 are arranged one-to-one with the plurality of grounding springs 1221, so that the grounding springs 1221 can be in more stable contact with the aluminum foil on the back of the cable, thereby achieving more effective grounding. The width of the plurality of grounding springs 1221 along the length direction is smaller than the width of the plurality of grounding avoidance grooves 1118 along the length direction, thereby providing sufficient space for the grounding springs 1221 to contact with the aluminum foil on the back of the cable, and also ensuring that the grounding springs 1221 can have a certain deformation space when subjected to pressure, thereby maintaining a stable grounding effect.

[0047] Please refer to Figures 4 to 5In some embodiments, the horizontal heights of several of the grounding springs 1221 are lower than the plane height of the shielding body 122, and several of the grounding springs 1221 are used to contact the aluminum foil on the back of the cable to play a grounding role, thereby ensuring that the grounding springs 1221 can be in close contact with the aluminum foil on the back of the cable, thereby achieving a good grounding effect, and effectively reducing the impact of electromagnetic interference on signal transmission quality, thereby improving the overall performance of the electrical connector 10.

[0048] Please refer to Figures 4 to 5 In some embodiments, the shielding body 122 and the plurality of bending portions 123 are provided with a plurality of lid-lifting grooves 126, and the bottoms of the plurality of lid-lifting grooves 126 are extended with lid-lifting spring pieces 1222, and the horizontal heights of the lid-lifting spring pieces 1222 are higher than the plane heights of the shielding body 122, so that the lid-lifting spring pieces 1222 can provide sufficient resilience for the upper cover 13, ensuring that the upper cover 13 can fit tightly on the base 11 when closed and maintain a self-locking state, so that the cable can maintain a stable electrical connection with the electrical connector 10, thereby further enhancing the stability and electromagnetic shielding effect of the electrical connector 10.

[0049] Please refer to Figure 3 In some embodiments, the fixing section 1117 is provided with a plurality of T-shaped bosses 1119, and the plurality of T-shaped bosses 1119 are arranged in a corresponding manner in the plurality of cover-lifting grooves 126, and the plurality of T-shaped bosses 1119 are used to prevent the cover-lifting spring piece 1222 from being deformed due to excessive pressing, thereby effectively improving the stability and service life of the cover-lifting spring piece 1222. The sides of the T-shaped bosses 1119 are provided with stop grooves 1120, and the bottom of the stop grooves 1120 is engaged with the side of the second limiting portion 124, and the stop grooves 1120 are used to limit the shielding spring piece 12 along the width direction, thereby realizing the limitation of the shielding spring piece 12 along the width direction, and further enhancing the stability and electromagnetic shielding effect of the shielding spring piece 12.

[0050] Please refer to Figure 5In some embodiments, several of the grounding spring pieces 1221 are provided with a downward section 1223, an arc section 1224 and an upward section 1225, wherein the downward section 1223 is used to provide support for the arc section 1224 to contact the aluminum foil on the back of the cable, and the arc section 1224 is used to abut against the aluminum foil on the back of the cable; the arc section 1224 is provided with a plurality of reinforcing protrusions at one end away from the base body 111, thereby not only enhancing the strength and stability of the grounding spring piece 1221, but also enabling it to better contact the aluminum foil on the back of the cable, thereby achieving more effective grounding. A plurality of reinforcing ribs are provided at one end of the downward section 1223 close to the base body 111, and the plurality of reinforcing ribs are used to prevent the downward section 1223 from being deformed. The dual reinforcing effects of the reinforcing protrusions and the reinforcing ribs effectively prevent the downward section 1223 from being deformed upward, thereby ensuring the long-term stability and reliability of the contact between the arc section 1224 and the aluminum foil on the back of the cable, further forming a stable and unified grounding loop, improving the overall electromagnetic shielding effect, and avoiding the problem of unstable grounding caused by deformation of the grounding spring piece 1221.

[0051] Please refer to Figures 6 to 12 In some embodiments, the electrical connector 10 further includes an upper cover 13 and two fixing plates 14, wherein the upper cover 13 is used to lock the cable; the two fixing plates 14 are used to prevent the upper cover 13 from being separated from the base body 111, and the two fixing plates 14 are respectively arranged in the upper cover connecting portion 112, and locking mechanisms 131 are arranged on both sides of the upper cover 13, wherein the locking mechanisms 131 include a stop buckle 1311 and a pressing protrusion 1312, and a buckle through hole 1121 corresponding to the stop buckle 1311 is arranged in the base body 111, and the stop buckle 1311 is used to lock the cable when the base 11 body is inserted into the cable. Specifically, the cable is provided with a locking mechanism 131 on both sides. The retaining buckle 1311 can be inserted into the slot, thereby ensuring that when the cable is inserted into the base 11 body, the cable is not easily disengaged under vibration and shaking conditions. The upper cover 13 is provided with a plurality of abutment grooves 132 at one end close to the base body 111, and the plurality of abutment grooves 132 are arranged one-to-one with the flip cover spring pieces 1222. The plurality of abutment grooves 132 are used to bear the resilience of the flip cover spring pieces 1222 to prevent the retaining buckle 1311 from being disengaged from the buckle through hole 1121, thereby ensuring that the position of the upper cover 13 is stable during use, without the risk of self-locking failure, and further enhancing the stability and electromagnetic shielding effect of the electrical connector 10.

[0052] Please refer to Figures 7 to 12In some embodiments, the pressing protrusion 1312 is provided with a self-locking through hole 1313 along the width direction, and the fixing sheet 14 is inserted into the self-locking through hole 1313, and the fixing sheet 14 is used to fix the pressing protrusion 1312 in the upper cover connecting portion 112; the bottom surface of the self-locking through hole 1313 is provided with a self-locking section 1314 and an unlocking section 1315, and the angle between the tangent of the self-locking section 1314 and the unlocking section 1315 is set at an acute angle; the self-locking section 1314 and the unlocking section 1315 are both fitted and arranged below the fixing sheet 14; wherein, When the upper cover 13 is in a self-locking state, the self-locking section 1314 abuts against the fixing plate 14, so that the upper cover 13 is firmly fixed; when the upper cover 13 is in a non-self-locking state, the unlocking section 1315 abuts against the fixing plate 14 to limit the displacement of the upper cover 13, and then through the contact switching between the self-locking section 1314 and the unlocking section 1315 and the fixing plate 14, a limiting function in different states is provided, ensuring that the upper cover 13 is firmly fixed in the self-locking state and limiting the displacement in the non-self-locking state, thereby increasing the reliability and service life of the fixation of the upper cover 13.

[0053] Please refer to Fig.13 In some embodiments, the electrical connector 10 further includes a plurality of connection terminals 15, and the plurality of connection terminals 15 are arranged above the base plate 1113 along the length direction. The connection terminals 15 have a terminal contact portion 151 and a terminal welding portion 152 that are relatively arranged. The terminal contact portion 151 is provided with a plurality of arc-shaped protrusions 1511 that are arranged at intervals, so that the terminal contact portion 151 can provide a more stable electrical contact during signal transmission. At the same time, the arc-shaped protrusion 1511 structure also helps to reduce the contact resistance in signal transmission, thereby improving the stability and efficiency of high-speed signal transmission.

[0054] The second embodiment of the present application provides a signal transmission circuit, which includes the electrical connector as described above, thereby improving the resistance of the signal transmission circuit to external electromagnetic interference and providing a better signal transmission effect.

[0055] In summary, the present application provides an electrical connector and a signal transmission circuit, the electrical connector comprising: a base, the base is provided with a base body and two upper cover connecting parts, the base body has a length direction and a width direction; the two upper cover connecting parts are integrally formed and arranged on both sides of the base body; the base body is provided with a crossbeam, a shielding placement area and a bottom plate along the height direction; the crossbeam is used to connect the two upper cover connecting parts, and a first air avoidance groove is formed between the crossbeam and the shielding placement area; the shielding placement area is provided with a main bearing section, a bending section and a fixing section in sequence along the width direction; a shielding spring sheet, the shielding spring sheet is fixedly arranged on the shielding placement area; the shielding spring sheet is provided along the width direction A first limiting portion, a shielding body, a plurality of bending portions, a plurality of second limiting portions and a plurality of grounding portions are sequentially arranged; a plurality of grounding spring sheets and a plurality of flip-cover spring sheets are arranged in the shielding body, and the plurality of grounding spring sheets and the plurality of flip-cover spring sheets are alternately arranged in the shielding body along the length direction; wherein, the first limiting portion is arranged in the first avoiding groove, and the first avoiding groove is used to limit the height direction of the first limiting portion; the shielding body is fitted with the main bearing section, the plurality of bending portions are fitted with the bending section, and the plurality of second limiting portions are fitted with the fixed section, and the fixed section is used to limit the height direction of the plurality of second limiting portions. The electrical connector is tightly matched with the main bearing section, bending section and fixing section of the shielding placement area through the shielding spring sheet, so that the shielding spring sheet can be firmly fixed on the base; the grounding spring sheet and the flip cover spring sheet in the shielding body are alternately arranged in the length direction to form a unified grounding loop, optimize the shielding effect, provide more uniform and reliable electromagnetic shielding, and significantly improve the ability to suppress electromagnetic interference; the grounding spring sheet in the shielding spring sheet is in direct contact with the aluminum foil on the back of the cable to form a stable grounding connection, which not only effectively improves the electromagnetic shielding effect of the electrical connector, but also ensures that the electrical connector can maintain efficient signal transmission performance when facing external electromagnetic interference. By providing the first limiting portion, the bending portion and the second limiting portion, as well as the corresponding air avoidance groove, the bending section and the fixing section, the deformation of the shielding spring on the base is controlled, the displacement and deformation of the shielding spring are effectively avoided, and the long-term stability and reliability of the electromagnetic shielding of the electrical connector are ensured; the flip cover spring in the shielding spring provides an effective downward pressure rebound force for the upper cover, and the rebound force of the flip cover spring enables the upper cover to quickly return to its original position when unlocked, and the self-locking stability of the upper cover can be maintained when the cable is inserted; thereby, the shielding spring integrates four functions of grounding, fixing, downward pressure rebound and shielding electromagnetic interference, thereby forming a unified grounding loop, improving the overall electromagnetic shielding effect, and avoiding the problem of unstable grounding caused by deformation of the shielding spring.

[0056] It should be understood that the application of the present application is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. An electrical connector, characterized in that: The electrical connector comprises: A base, wherein the base is provided with a base body and two upper cover connecting parts, the base body has a length direction and a width direction; the two upper cover connecting parts are integrally formed and arranged on both sides of the base body; the base body is provided with a crossbeam, a shielding placement area and a bottom plate along the height direction; the crossbeam is used to connect the two upper cover connecting parts, and a first air avoidance groove is formed between the crossbeam and the shielding placement area; the shielding placement area is provided with a main bearing section, a bending section and a fixing section in sequence along the width direction; A shielding spring sheet, wherein the shielding spring sheet is fixedly arranged on the shielding placement area; the shielding spring sheet is sequentially provided with a first limiting portion, a shielding body, a plurality of bending portions, a plurality of second limiting portions and a plurality of grounding portions along the width direction; a plurality of grounding spring sheets and a plurality of cover spring sheets are arranged in the shielding body in an alternating manner along the length direction; Among them, the first limiting portion is arranged in the first avoiding groove, and the first avoiding groove is used to limit the first limiting portion in the height direction; the shielding body is fitted with the main bearing section, and the plurality of bending portions are fitted with the bending section, and the plurality of second limiting portions are all fitted with the fixed section, and the fixed section is used to limit the plurality of second limiting portions in the height direction.

2. The electrical connector according to claim 1, characterized in that: The main bearing section and the bending section are provided with a plurality of grounding avoidance grooves, and the plurality of grounding avoidance grooves are arranged one-to-one correspondingly to the plurality of grounding spring sheets, and the width of the plurality of grounding spring sheets along the length direction is smaller than the width of the plurality of grounding avoidance grooves along the length direction.

3. The electrical connector according to claim 2, characterized in that: The horizontal heights of the plurality of grounding springs are all lower than the plane height of the shielding body, and the plurality of grounding springs are all used to contact the aluminum foil on the back of the cable to play a grounding role.

4. The electrical connector according to claim 2, characterized in that: The shielding body and the bent parts are provided with a plurality of cover-lifting grooves, the bottoms of the plurality of cover-lifting grooves are provided with cover-lifting spring pieces extending therefrom, and the horizontal heights of the cover-lifting spring pieces are all higher than the plane height of the shielding body.

5. The electrical connector according to claim 4, characterized in that: A plurality of T-shaped bosses are arranged in the fixing section, and the plurality of T-shaped bosses are arranged in a one-to-one correspondence in the plurality of flip cover grooves, and the plurality of T-shaped bosses are used to prevent the flip cover spring sheet from being over-pressed and deformed; The sides of the T-shaped bosses are all provided with stop grooves, the bottoms of the stop grooves are engaged with the sides of the second limiting portion, and the stop grooves are used to limit the shielding springs along the width direction.

6. The electrical connector according to claim 3, characterized in that: A plurality of the grounding springs are each provided with a downward section, an arc section and an upward section, and a plurality of reinforcing protrusions are provided at one end of the arc section away from the base body; A plurality of reinforcing ribs are arranged at one end of the downward section close to the base body, and the plurality of reinforcing ribs are used to prevent the downward section from being deformed.

7. The electrical connector according to claim 1, characterized in that: The electrical connector further comprises an upper cover and two fixing plates, the two fixing plates are respectively arranged in the upper cover connecting portion, both sides of the upper cover are provided with locking mechanisms, the locking mechanisms comprise a stop buckle and a pressing protrusion, a buckle through hole corresponding to the stop buckle is arranged in the base body, and the stop buckle is used to lock the flat cable when inserting the flat cable; A plurality of abutment grooves are arranged at one end of the upper cover close to the base body, and the plurality of abutment grooves are arranged one-to-one corresponding to the flip cover spring pieces, and the plurality of abutment grooves are used to bear the resilience of the flip cover spring pieces to prevent the stop buckle from detaching from the buckle through hole.

8. The electrical connector according to claim 7, characterized in that: The pressing protrusion is provided with a self-locking through hole along the width direction, the fixing sheet is inserted into the self-locking through hole, and the fixing sheet is used to fix the pressing protrusion in the upper cover connecting portion; the bottom surface of the self-locking through hole is provided with a self-locking section and an unlocking section, and the angle between the tangent of the self-locking section and the unlocking section is set at an acute angle; Among them, when the upper cover is in a self-locking state, the self-locking section abuts against the fixing plate, so that the upper cover is firmly fixed; when the upper cover is in a non-self-locking state, the unlocking section abuts against the fixing plate to limit the displacement of the upper cover.

9. The electrical connector according to any one of claims 1 to 8, characterized in that: The electrical connector further comprises a plurality of connection terminals, which are arranged above the bottom plate along the length direction. The connection terminals have terminal contact portions and terminal welding portions which are arranged opposite to each other, and a plurality of arc-shaped protrusions which are arranged at intervals are arranged in the terminal contact portions.

10. A signal transmission circuit, characterized in that: The signal transmission circuit comprises the electrical connector as described in any one of claims 1-9.

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