Wire-to-board connector

Abstract

A wire-to-board connector disclosed by the present invention comprises a first connecting piece, a second connecting piece and a locking assembly, the first connecting piece comprises a first shell and a first terminal, the first terminal comprises a main body part and a crimping part, the main body part comprises a substrate provided with a through hole, a first side plate and a first force arm, the first side plate is provided with a first contact, and the second side plate is provided with a second contact; the first side plate is bent and then extends to form a second force arm, the second force arm is provided with a second contact, and the crimping part is connected with the cable or the flexible flat cable; the second connecting piece comprises a second shell and a terminal assembly, and the terminal assembly is provided with a first contact surface and a second contact surface; the first contact and the second contact are tightly connected to the second contact surface and the first contact surface respectively; the locking assembly comprises a first locking piece and a second locking piece, the first locking piece locks the first terminal in the first shell, and the second locking piece locks the first shell in the second shell. According to the wire-to-board connector, the holding force between the terminals is improved, and the problems of unstable connection and poor transmission performance are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of connectors, and in particular relates to a wire-to-board connector. Background Art

[0002] Connectors are used to transmit current and / or signals, and are usually connected together by plugging to form a connector assembly. According to the structure of the connecting terminals, connectors can be divided into female connectors and male connectors. Among them, the connecting terminals of the female connector are usually electrically connected to the cables, cables (including FFC and FPC), and the connecting terminals of the male connector; the connecting terminals of the male connector are plugged into the female connector.

[0003] Wire-to-board connectors mainly include female connectors connected to cables or flat cables, and male connectors fixed to circuit boards. Wire-to-board connectors are widely used in electronic office equipment, power systems, industrial automation systems and other fields due to their flexible assembly, good transmission performance and easy installation.

[0004] As the new energy field develops towards lightweight, high integration and low cost, wire-to-board connectors that use flat cables instead of traditional wiring harnesses have been widely used in battery management systems. However, most wire-to-board connectors on the market are still mainly crimped cables, and the contact between the male and female terminals is unstable, resulting in poor transmission performance. Therefore, it is necessary to improve the structure of the wire-to-board connector. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides a wire-to-board connector, which adopts a terminal structure with double force arms and double contacts to improve the holding force between terminals and between terminals and the housing, thereby solving the problems of unstable contact and poor transmission performance of existing wire-to-board connectors.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0007] A wire-to-board connector, comprising:

[0008] A first connector includes a first housing and a first terminal disposed on the first housing, the first housing is provided with a terminal receiving groove, the first terminal includes a main body and a crimping portion, the main body is disposed in the terminal receiving groove, the main body includes a substrate with a through hole, a first side plate extending from the substrate, and a first force arm formed by bending the first side plate, the first side plate protrudes with a first contact, and the first side plate extends a second force arm after secondary bending, the second force arm is disposed inside the first force arm, the second force arm is provided with a second contact, and the crimping portion is connected to a cable or a flexible cable;

[0009] A second connector includes a second housing and a terminal assembly disposed on the second housing, the second housing includes a first end, a second end, a first side wall, a second side wall, and an accommodating cavity, the accommodating cavity is recessed from the first end toward the second end, the terminal assembly is inserted into the accommodating cavity from the second end, the terminal assembly is provided with a first contact surface and a second contact surface, the first contact surface and the second contact surface are respectively facing the first side wall and the second side wall; and

[0010] A locking assembly, comprising a first locking member and a second locking member, wherein the first locking member locks the first terminal in the first housing, and the second locking member is pre-locked in the first housing and locks the first housing to the second housing;

[0011] The first contact point is closely connected to the second contact surface, and the second contact point is squeezed by the first force arm and closely connected to the first contact surface.

[0012] In some embodiments, the main body also includes a second side panel, which extends from the other side of the substrate relative to the first side panel, and the second side panel is separated from the first force arm. The second side panel is tightly connected to the first side panel after being bent, and the first side panel, the second side panel, the first force arm and the second force arm are surrounded to form a terminal contact groove.

[0013] In some embodiments, the second force arm includes a first bending section bent toward the terminal contact slot and a second bending section bent away from the terminal contact slot, and the second force arm is provided with a groove between the first bending section and the second bending section;

[0014] The first force arm includes a third bending section bent in a direction away from the terminal contact slot, a fourth bending section bent in a direction toward the terminal contact slot, and a fifth bending section that continues to bend in a direction away from the terminal contact slot, and the first force arm is provided with a third contact in the fourth bending section and the fifth bending section, and the third contact abuts against the groove.

[0015] In some embodiments, the terminal assembly includes a second terminal and a third terminal, the second terminal includes a first pin and a first plug-in portion, the first contact surface and the second contact surface are provided on opposite side surfaces of the first plug-in portion, and the first plug-in portion is further provided with a first blanking surface on the lower side;

[0016] The third terminal includes a second pin, a pin bending section and a second plug-in portion, the first contact surface and the second contact surface are arranged on two opposite side surfaces of the second plug-in portion, and the second plug-in portion is further provided with a second blanking surface on the upper side;

[0017] The second terminal and the third terminal are inserted into the terminal contact slot through the first plug-in portion and the second plug-in portion respectively.

[0018] In some embodiments, the first housing is provided with a first mounting surface and a second mounting surface opposite to each other, the first mounting surface is provided with a first convex strip and a first groove, and the first groove is formed in a middle portion of the first housing and is recessed from the first mounting surface toward the second mounting surface;

[0019] The second shell is provided with a second groove and a second convex strip at the first end toward the second end, the second groove is matched and connected to the first convex strip, and the first groove is matched and connected to the second convex strip.

[0020] In some embodiments, the first shell is provided with a card slot on the second mounting surface, and the card slot is connected to the terminal accommodating slot; the main body is provided with an elastic card block, and the first locking member is provided with a buckle position, the first locking member is inserted into the card slot, and the elastic card block is snapped into the buckle position.

[0021] In some embodiments, the second locking member includes a locking body and an elastic arm extending from the locking body, wherein the elastic arm is provided with a stopper and a locking end;

[0022] The first housing is further provided with a guide bar and a guide groove on the first mounting surface, the stopper is inserted into the guide groove, and the elastic arm is pre-locked on both sides of the first groove along the guide bar;

[0023] The second shell is further provided with a bulged locking block, the locking block is connected to the second convex strip, and the locking end is snap-connected to the locking block.

[0024] In some embodiments, the first shell is provided with a cross beam above the guide bar, and the second locking piece passes through the cross beam to be pre-locked on the first mounting surface; the locking end and the stop block are not located on the same plane, the locking end slides along the guide bar, and the locking end and the stop block of the guide bar both have an inclined surface structure.

[0025] In some embodiments, the unlocking direction of the first terminal is the same as the direction in which the terminal assembly is inserted into the terminal contact slot.

[0026] In some embodiments, the unlocking jig is provided with an unlocking rack, and the unlocking rack is inserted into the terminal contact groove to push the first terminal to loosen and separate from the terminal receiving groove.

[0027] In summary, the present invention has at least the following benefits:

[0028] 1. In the wire-to-board connector provided by the present invention, a through hole is provided on the substrate of the first terminal of the first connecting member, which is convenient for CCD detection of spring height and electroplating after stamping. The first force arm and the second force arm extending from the substrate abut against each other, and the second contact cooperates with the first contact of the first side plate to stably connect and maintain contact with the second terminal and the third terminal inserted into the terminal contact groove, thereby improving the connection stability between the terminals and enhancing the transmission efficiency.

[0029] 2. The wire-to-board connector provided by the present invention uses a first locking member to lock the first terminal in the first shell, uses a second locking member to pre-lock the first shell, and locks the first shell in the second shell; and guides and pre-locking members are provided in the first shell and the second shell to prevent the terminal from being damaged by oblique insertion during the plug-in process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is an exploded view of the wire-to-board connector of Example 1 of the present invention.

[0031] Figure 2 for Figure 1 Enlarged schematic diagram of part A.

[0032] Figure 3 This is a schematic structural diagram of the first terminal of Embodiment 1 of the present invention at a viewing angle.

[0033] Figure 4 It is a schematic diagram of the local structure of the first terminal of Embodiment 1 of the present invention at another viewing angle.

[0034] Figure 5 This is a bottom view of the first terminal of embodiment 1 of the present invention.

[0035] Figure 6 This is a schematic diagram of the structure of the terminal assembly of Example 1 of the present invention.

[0036] Figure 7 This is a schematic diagram of the connection between the first terminal and the terminal assembly of Example 1 of the present invention.

[0037] Figure 8 This is a partial cross-sectional view of the main body of the first terminal according to embodiment 1 of the present invention.

[0038] Fig. 9 This is a schematic structural diagram of the second terminal and the third terminal of Example 1 of the present invention.

[0039] Fig.10 This is a schematic structural diagram of the first shell and the first locking member of Example 1 of the present invention.

[0040] Fig.11 This is a schematic structural diagram of the first shell and the second locking member of Example 1 of the present invention.

[0041] Fig.12 This is a schematic structural diagram of the second connecting member of Example 1 of the present invention.

[0042] Fig.13 This is a schematic diagram of the structure in which the second locking member is pre-locked on the first housing in accordance with Embodiment 1 of the present invention.

[0043] Fig.14 This is a schematic diagram of the structure of the wire-to-board connector of Example 1 of the present invention.

[0044] Fig.15 This is an exploded view of the wire-to-board connector of Example 2 of the present invention.

[0045] Fig.16 This is a schematic diagram of the structure of the first terminal of Example 2 of the present invention.

[0046] Fig.17 This is a partial cross-sectional view of the first connecting member of Example 3 of the present invention.

[0047] Fig.18 This is a schematic diagram of a first unlocking fixture unlocking a first terminal according to Embodiment 3 of the present invention.

[0048] Fig.19 This is a partial cross-sectional view of the first unlocking fixture unlocking the first terminal according to Embodiment 3 of the present invention.

[0049] Fig. 20 This is a schematic structural diagram of a wire-to-board connector and a second unlocking fixture according to Embodiment 4 of the present invention.

[0050] Markings in the figure:

[0051] 100-wire-to-board connector;

[0052] 1- first connecting member;

[0053] 11-first housing, 12-first terminal;

[0054] 110 - terminal accommodating groove, 111 - first convex strip, 112 - first groove, 113 - clamping groove, 114 - guide strip, 115 - guide groove, 116 - cross beam, 117 - stop block, 118 - unlocking position;

[0055] 121 - main body, 122 - crimping portion, 123 - through hole, 124 - insertion port, 125 - terminal contact groove, 126 - barrier;

[0056] 1101-first mounting surface, 1102-second mounting surface;

[0057] 1211-base plate, 1212-first side plate, 1213-first force arm, 1214-first contact point, 1215-second force arm, 1216-second contact point, 1217-second side plate, 1218-elastic block;

[0058] 1221-convex teeth, 1222-enclosure block;

[0059] 1241-first enclosure, 1242-second enclosure, 1243-limiting plate;

[0060] 1200 - base surface, 1201 - first bending section, 1202 - second bending section, 1203 - third bending section, 1204 - fourth bending section, 1205 - fifth bending section, 1206 - groove, 1207 - third contact point;

[0061] 2- second connecting member;

[0062] 21-second housing, 22-terminal assembly;

[0063] 211 - first end, 212 - second end, 213 - first side wall, 214 - second side wall, 215 - accommodating cavity, 216 - second groove, 217 - second convex strip, 218 - locking block, 219 - mounting groove;

[0064] 2201-first contact surface, 2202-second contact surface;

[0065] 221- second terminal, 222- third terminal,

[0066] 2211-first pin, 2212-first plug-in portion, 2213-first blanking surface;

[0067] 2221 - second pin, 2222 - pin bending section, 2223 - second plug-in portion, 2224 - second blanking surface;

[0068] 3-locking assembly;

[0069] 31-first locking member, 311-buckle position;

[0070] 32-second locking member, 321-locking body, 322-elastic arm, 3221-stopper, 3222-locking end;

[0071] 4-flexible cable, 5-cable, 6-fixed plate, 7-circuit board;

[0072] 81-first unlocking fixture, 811-unlocking rack;

[0073] 82- second unlocking fixture, 821- claw, 822- handle. DETAILED DESCRIPTION

[0074] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively in conjunction with the accompanying drawings and specific embodiments. The preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0075] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0076] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0078] Embodiment 1:

[0079] like Figure 1-Figure 14 As shown, this embodiment provides a wire-to-board connector 100, including a first connector 1, a second connector 2 and a locking assembly 3, wherein the first connector 1 and the second connector 2 are detachably plugged together and locked and limited by the locking assembly 3.

[0080] The first connector 1 includes a first housing 11 and a first terminal 12, and the first terminal 12 is arranged in the first housing 11. The first housing 11 is an insulating plastic part, which is provided with a terminal accommodating groove 110 for installing the first terminal 12. The first terminal 12 includes a main body 121 and a crimping part 122, and the crimping part 122 can be connected to a cable or a flexible cable, such as an FPC or FFC. In this embodiment, the first terminal in which the crimping part 122 is connected to the flexible cable 4 is used as an example for description. The main body 121 includes a substrate 1211, a first side plate 1212 and a first force arm 1213, the substrate 1211 is provided with a through hole 123, and the first side plate 1212 is formed by extending from the substrate 1211. In some embodiments, the first force arm 1213 is formed by bending the first side plate 1212, and the first force arm 1213 and the substrate 1211 are separated from each other, or the first force arm 12 is connected to the substrate 1211. In some other embodiments, the first lever arm 1213 may also be formed by extending from the other side of the base plate 1211 relative to the first side plate 1212 .

[0081] The first side plate 1212 is protruded with a first contact point 1214 , and the first side plate 1212 is bent twice to extend a second lever arm 1215 . The second lever arm 1215 is disposed inside the first lever arm 1213 , and a second contact point 1216 is disposed on the second lever arm 1215 .

[0082] The second connector 2 includes a second housing 21 and a terminal assembly 22, and the terminal assembly 22 is disposed in the second housing 21. The second housing 21 is also an insulating plastic part, and the second housing 21 includes a first end 211, a second end 212, a first side wall 213, a second side wall 214 and an accommodating cavity 215. The accommodating cavity 215 is formed by being recessed from the first end 211 toward the second end 212, and the terminal assembly 22 is inserted into the accommodating cavity 215 from the second end 212. The terminal assembly 22 is provided with a first contact surface 2201 and a second contact surface 2202, wherein the first contact surface 2201 faces the first side wall 213, and the second contact surface 2202 faces the second side wall 214. When the second connector 2 is plugged into the first connector 1, the terminal assembly 22 is connected to the first terminal 12. The first contact 1214 is tightly connected to the second contact surface 2202, and the second contact 1216 is tightly connected to the first contact surface 2201 by the compression of the first force arm 1213.

[0083] The locking assembly 3 includes a first locking member 31 and a second locking member 32. The first locking member 31 locks the first terminal 12 in the first housing 11; the second locking member 32 is pre-locked in the first housing 11, and after the first connector 1 and the second connector 2 are plugged in, the second locking member 32 locks the first housing 11 in the second housing 21.

[0084] Specifically, the second housing 21 has a first end 211 and a second end 212 opposite to each other in the longitudinal direction Y, and a first side wall 213 and a second side wall 214 opposite to each other in the transverse direction X. In the present embodiment, the first end 211 and the second end 212 are respectively the front end and the rear end of the second housing 21, and the first side wall 213 and the second side wall 214 are respectively the left side wall and the right side wall of the second housing 21. The terminal assembly 22 includes a second terminal 221 and a third terminal 222, each of which is provided with a first contact surface 2201 and a second contact surface 2202. The first contact surface 2201 faces the first side wall 213 on the left side and is closely connected to the second contact 1216; the second contact surface 2202 faces the second side wall 214 on the right side and is closely connected to the first contact 1214.

[0085] When the first terminal 12 is inserted into the terminal receiving groove 110 of the first housing 11, the substrate 1211 of the main body 121 is facing upward in the thickness direction Z, and the substrate 1211 is provided with a through hole 123. After the first terminal 12 is stamped, it needs to be inspected and electroplated. In this embodiment, the through hole 123 is opened in the middle of the substrate 1211. After the stamping process, the through hole 123 opened by the first terminal 12 can be light-transmissive, so that the spring height of the first terminal can be checked from the substrate 1211 using CCD; in addition, after the first terminal 12 is stamped, the plating liquid can smoothly enter the interior from the through hole 123 to fully electroplate the first terminal 12. In some terminal structures with upper and lower contacts, it is not possible to open a through hole in a suitable position after stamping, which makes it inconvenient to perform CCD inspection after stamping; in addition, the wrapping of these upper and lower contacts and the thickness of the contact film make it difficult to electroplate, and only pre-plated materials can be selected for stamping. Since the first terminal 12 of this embodiment has a through hole 123 on the substrate 1211 of the main body 121, CCD detection and subsequent electroplating treatment can be performed after stamping to form a stable protective film layer, thereby improving the contact retention force and service life of the terminal.

[0086] refer to Figure 7The first side plate 1212 is formed by bending downward and extending from one side of the base plate 1211. A first contact 1214 is provided on the first side plate 1212, and the first contact 1214 is closely connected to the second contact surface 2202 of the terminal assembly 22. Then, the first side plate 1212 is bent twice, that is, it is bent horizontally first and then bent upward to form a second force arm 1215. The second force arm 1215 is provided with a second contact 1216, and the second contact 1216 is closely connected to the first contact surface 2201 of the terminal assembly 22. The first force arm 1213 and the second force arm 1215 are split structures, wherein the second force arm 1215 is close to the insertion port 124 of the first terminal 12, while the first force arm 1213 is far away from the insertion port 124. In this embodiment, the first lever arm 1213 is also formed by the first side plate 1212 through secondary bending, and the first lever arm 1213 elastically abuts against the outer side of the second lever arm 1215 , and the connection between the second contact point 1216 and the first contact surface 2201 provides a retaining force.

[0087] Furthermore, the main body 121 also includes a second side plate 1217, which is formed by bending and extending from the other side of the substrate 1211 relative to the first side plate 1212. In some embodiments, the second side plate 1217, the first force arm 1213, and the second force arm 1215 are located on the same side of the substrate 1211, and the second side plate 1217 and the first force arm 1213 are separated from each other. The second side plate 1217 is bent and extended from the substrate 1211 and is limitedly connected to the outside of the second force arm 1215, and then the second side plate 1217 is bent and tightly connected to the first side plate 1212. The first side plate 1212, the second side plate 1217, the first force arm 1213, and the second force arm 1215 are surrounded together to form a terminal contact groove 125. The terminal assembly 22 is plugged into the first terminal 12 through the insertion port 124, and then limited and retained in the terminal contact groove 125.

[0088] Furthermore, the first side plate 1211 is horizontally bent to form a first enclosure 1241, and the second side plate 1217 is horizontally bent to form a second enclosure 1242. The first enclosure 1241 and the second enclosure 1242 are jointly arranged on a side opposite to the substrate 1211, and the second enclosure 1242 is located outside the first enclosure 1241. In addition, the second side plate 1217 is horizontally bent and then bent downward obliquely to form a stop plate 1243. The stop plate 1243 is separated from the second enclosure 1242, and obliquely inserted into the terminal contact groove 125 to form a gear structure for the terminal assembly 22, thereby improving the pre-holding force of the terminal assembly 22. That is, when the terminal assembly 22 is plugged into the first terminal 12, the front end of the terminal assembly 22 first passes through the insertion port 124 and is partially inserted into the terminal contact groove 125, and then passes through the gear formed by the stop plate 1243 before being fully inserted into the terminal contact groove 125. At the same time, the gear position formed by the limit plate 1243 also has the function of preventing the terminal assembly 22 from retreating and separating. The main body 121 is also provided with a blocking member 126, which abuts against the first force arm 1213 in the longitudinal direction Y or has a certain gap with the first force arm 1213, and the blocking member 126 can limit the terminal assembly 22 from being over-inserted.

[0089] exist Figure 1-Figure 7 Based on reference Figure 8 ,like Figure 8 As shown, in the longitudinal direction Y, the second force arm 1215 has a two-section bending structure, and the second force arm 1215 includes a first bending section 1201 bent toward the terminal contact groove 125, and a second bending section 1202 bent away from the terminal contact groove 125, and a groove 1206 is formed between the first bending section 1201 and the second bending section 1202.

[0090] In the longitudinal direction Y, the first force arm 1213 has a three-stage bending structure, and the first force arm includes a third bending section 1203 bent in a direction away from the terminal contact slot 125, a fourth bending section 1204 bent toward the terminal contact slot 125, and a fifth bending section 1205 that continues to bend in a direction away from the terminal contact slot 125. The first force arm 1213 is provided with a third contact 1207 at the connection between the fourth bending section 1204 and the fifth bending section 1205, and the third contact 1207 abuts against the groove 1206. Based on this structure, the first force arm 1213 elastically abuts against the outside of the second force arm 1215, and provides a stable holding force for the contact connection between the second contact 1216 and the terminal assembly. The terminal assembly 22 is inserted into the terminal contact slot 125, and the first contact 1214 and the second contact 1216 are respectively tightly connected to the second contact surface and the first contact surface in the transverse direction X.

[0091] It should be noted that if Figure 5As shown, the main body 121 is provided with a base surface 1200 on the substrate 1211, and the projections of the first contact 1214, the second contact 1216 and the third contact 1207 on the base surface 1200 all fall into the through hole 123. Based on this structure, the plating liquid can smoothly enter the interior of the first terminal 12 from the through hole 123 to electroplate the first contact 1214, the second contact 1216 and the third contact 1207. Therefore, after the first terminal 12 is stamped, CCD detection and subsequent electroplating treatment are performed, and a comprehensive and stable protective film layer is formed on the first contact 1214, the second contact 1216 and the third contact 1207, thereby improving the contact retention force between the first terminal and the terminal assembly and improving the data transmission efficiency.

[0092] Combined with reference Figure 6 and Fig. 9 The terminal assembly 22 includes a second terminal 221 and a third terminal 222. The second terminal 221 includes a first pin 2211 and a first plug-in portion 2212. The first contact surface 2201 and the second contact surface 2202 are arranged on two opposite sides of the first plug-in portion 2212. The first plug-in portion 2212 is provided with a first blanking surface 2213 at the lower side. The second terminal 221 is plugged into the terminal contact groove 125 through the first plug-in portion 2212.

[0093] The third terminal 222 includes a second pin 2221, a pin bending section 2222 and a second plug-in portion 2223. The first contact surface 2201 and the second contact surface 2202 are disposed on opposite sides of the second plug-in portion 2223. The second plug-in portion 2223 is provided with a second blanking surface 2224 on the upper side. The third terminal 222 is plugged into the terminal contact slot 125 through the second plug-in portion 2223.

[0094] The first plug-in portion 2212 and the second plug-in portion 2223 are both rounded at the front end, which can guide the second terminal 221 and the third terminal 222 to be smoothly inserted into the terminal contact groove 125 and reduce the insertion resistance. The second terminal 221 and the third terminal 222 are respectively provided with a first blanking surface 2213 and a second blanking surface 2224, which can meet the requirements of housings with different spacings, facilitate assembly and stamping, and have high mass production.

[0095] The third terminal 222 is provided with a pin bending section 2222 so that the second plug-in portion 2223 is located directly above the first plug-in portion 2212 and the creepage distance can be increased. It can be considered that the second terminal 221 is a lower row terminal in the terminal assembly 22, and the third terminal 222 is an upper row terminal in the terminal assembly 22.

[0096] In the first terminal 12 of this embodiment, the crimping portion 122 is provided with a plurality of protruding teeth 1221, which can be used to pierce the insulation coating and / or the wire of the flexible flat cable, and then bend and wrap the wire to be electrically connected with the wire. The end of the protruding teeth 1221 is a pointed structure.

[0097] Combined with reference Figure 1 , Figure 10-12 In the first connector 1, the first housing 11 is provided with a first mounting surface 1101 and a second mounting surface 1102 opposite to each other. In the thickness direction Z, the first mounting surface 1101 is the upper side of the first housing 11, and the second mounting surface 1102 is the lower side of the first housing 11. The first housing 11 is provided with a first convex strip 111 and a first groove 112 on the first mounting surface 1101. The first groove 112 is formed concavely from the first mounting surface 1101 toward the second mounting surface 1102, and the first convex strip 111 protrudes from the first mounting surface 1101.

[0098] In the second connector 2, the second shell 12 is provided with a second groove 216 and a second ridge 217 extending from the first end 211 toward the second end, and the second ridge 217 protrudes toward the accommodating cavity 215. The second groove 216 is connected to the first ridge 111, and the first groove 112 is connected to the second ridge 217.

[0099] In the wire-to-board connector of this embodiment, the first convex strip 111 cooperates with the second groove 216, and the second convex strip 217 cooperates with the first groove 112, so as to guide the first housing 11 to be inserted into the accommodating cavity 215 of the second housing 21. In addition, since the second convex strip 217 protrudes toward the accommodating cavity 215, the left and right sides of the plug-in end of the first housing 11 can be blocked when the first groove 112 of the first housing 11 is connected to the first housing 11, thereby preventing the first housing 11 from being inserted obliquely and protecting the terminal assembly.

[0100] The first housing 11 is provided with a card slot 113 on the second mounting surface 1102, and the card slot 113 is connected to the terminal receiving groove 110. The first terminal 12 is provided with an elastic card block 1218 on the main body 121, and the elastic card block 1218 is formed by bending the second side plate 1217, and the elastic card block 1218 is slightly bent in the direction away from the terminal contact groove 125, presenting a warped structure. The first locking member 31 is correspondingly provided with a buckle position 311. After the first terminal 12 is inserted into the terminal receiving groove 110, the first locking member 31 is inserted into the card slot 113 along the second mounting surface 1102 toward the first mounting surface 1101, and then the elastic card block 1218 is engaged in the buckle position 311, thereby preventing the first terminal 12 from being displaced in the terminal receiving groove 110.

[0101] Further references Figure 1 and Fig.10The first terminal 12 is inserted into the terminal receiving groove 110 along the longitudinal direction Y, the first locking member 31 is inserted into the card slot 113 along the thickness direction Z, and the elastic card block 1218 is engaged in the buckle position 311 in the horizontal direction X, thereby locking the first terminal 12 in the terminal receiving groove 110.

[0102] like Fig.11 and Fig.12 As shown, the second locking member 32 includes a locking body 321 and an elastic arm 322, and the elastic arm 322 extends from the locking body 321. In this embodiment, two elastic arms 322 extend from the locking body 321 along the longitudinal direction Y, and a stopper 3221 and a locking end 3222 are provided on the elastic arm 322.

[0103] The first housing is further provided with a guide bar 114 and a guide groove 115 on the first mounting surface 1101 . The stopper 3221 is inserted into the guide groove 115 , and the elastic arm 322 is pre-locked on both sides of the first groove 112 along the guide bar 114 .

[0104] Furthermore, the second housing 21 is also provided with a locking block 218 protruding toward the accommodating cavity 215, and the locking block 218 is connected to the second convex strip 217. The locking block 218 is an enlarged ring-like structure, and the locking block 218 is respectively connected to the first end 211 and the second convex strip 217, and the second convex strip 217 is more protruding toward the accommodating cavity 215 than the locking block 218, that is, the thickness of the second convex strip 217 is greater than the thickness of the locking block 218. After the first housing 11 is fully inserted into the second housing 21, the locking end 3222 of the second locking member 32 is engaged and connected to the locking block 218.

[0105] The first housing 11 is provided with a crossbeam 116 above the guide bar 115. The guide bar 115 is provided with a stop block 117 at the junction with the first groove 112. The stop block 117 has an inclined surface structure. When the first housing 11 is not inserted into the second housing 21, the second locking member 32 passes through the crossbeam 116 and is pre-locked on the first mounting surface 1101. Since the second locking member 32 is provided with a push stop, the second locking member cannot be pushed forward further. After the first housing 11 is inserted into the accommodating cavity 215 of the second housing 21, the locking end 3222 continues to move forward, the elastic arm 322 expands outward, and the locking end 3222 is finally engaged and connected to the locking block 218.

[0106] It should be noted that, in the second locking member 32, the locking end 3222 and the stopper 3221 are not located on the same plane, and the stopper 3221 is closer to the first mounting surface 1101 than the locking end 3222, which can limit the moving direction of the elastic arm and prevent the elastic arm from tilting upward.

[0107] like Fig.13As shown, the locking end 3222 also has an inclined surface structure, which slides along the guide strip 115 and passes through the crossbeam 116, and then the locking end 3222 is matched and connected to the stop block 117, and the elastic arm 322 is located on both sides of the first groove 112. After the first shell 11 is inserted into the accommodating cavity 215 of the second shell 21, the locking end 3222 continues to move forward and finally engages and connects to the locking block 218, so that the first shell and the second shell cannot be unlocked, which plays a role of secondary protection.

[0108] In this embodiment, the stop block and the locking end are both made into a structure with an inclined surface, that is, the force-bearing surface is an inclined surface, so that when the second locking member is pushed forward, the elastic arm will generate a downward component of force, which can prevent the elastic arm from tilting upward, so that the second locking member is finally locked in the second shell.

[0109] Fig.14 The schematic diagram of the structure of the wire-to-board connector of this embodiment is shown in FIG. Figure 1 , Fig.12 and Fig.14 The second connector 2 is provided with a mounting groove 219 on the first side wall 213 and the second side wall 214. The fixing piece is inserted into the mounting groove 219 and the second connector 2 is installed on the circuit board 7. The first connector 1 is plugged with the flexible cable 4. Then the first connector 1 and the second connector 2 are plugged together to complete the assembly of the wire-to-board connector.

[0110] The wire-to-board connector provided in this embodiment has a through hole on the substrate of the first terminal of the first connector, which is convenient for CCD detection of spring height and electroplating after stamping. The first force arm and the second force arm extending from the substrate abut against each other, and the second contact cooperates with the first contact of the first side plate to stably connect with the second terminal and the third terminal inserted into the terminal contact groove and maintain contact in the lateral direction, thereby improving the connection stability between the terminals and the transmission efficiency. In addition, the wire-to-board connector of this embodiment uses a first locking member to lock the first terminal in the first shell, and a second locking member to lock the first shell in the second shell; and guides and pre-locking members are provided in the first shell and the second shell to prevent the terminals from being damaged by oblique insertion during the plug-in process.

[0111] Embodiment 2:

[0112] This embodiment provides another structure of a wire-to-board connector, such as Fig.15 As shown, the wire-to-board connector 100 of this embodiment includes a first connector 1, a second connector 2 and a locking assembly 3. The first connector 1 and the second connector 2 are detachably plugged together and are locked and limited by the locking assembly 3.

[0113] The first connector 1 includes a first housing 11 and a first terminal 12, and the first terminal 12 is disposed in the first housing 11. The second connector 2 includes a second housing 21 and a terminal assembly 22, and the terminal assembly 22 is disposed in the second housing 21. The locking assembly 3 includes a first locking member 31 and a second locking member 32. The first locking member 31 locks the first terminal 12 in the first housing 11; the second locking member 32 is pre-locked in the first housing 11, and after the first connector 1 and the second connector 2 are plugged in, the second locking member 32 locks the first housing 11 in the second housing 21.

[0114] The first terminal 12 includes a main body 121 and a crimping portion 122, but unlike the first terminal of the first embodiment in which the crimping portion is connected to the flexible flat cable, the crimping portion 122 of the present embodiment is connected to the cable 5. In the first terminal 12, the crimping portion 122 is provided with a convex tooth 1221 and a wrapping block 1222, and the cable 5 is placed on the crimping portion 122 after the insulation layer is stripped, and then the convex tooth 1221 and the wrapping block 1222 are bent, wherein the wire is wrapped and contacted by the wrapping block 1222, and the convex tooth 1221 is crimped and wrapped with the insulation layer of the cable 5.

[0115] For other structures of the wire-to-board connector of this embodiment, please refer to the corresponding description of Embodiment 1, which will not be repeated here.

[0116] Embodiment 3:

[0117] Fig.17 is a partial cross-sectional view of the first connecting member of this embodiment, Figure 1-Figure 16 Based on reference Fig.17 The first terminal 12 is installed in the terminal accommodating groove 110, and the terminal assembly 22 is inserted into the terminal contact groove 125 of the first terminal 12 from the insertion port 124, that is, the terminal assembly 22 is inserted into the terminal contact groove 125 through the insertion port 114 in the longitudinal direction Y.

[0118] Fig.18 and Fig.19 Schematic diagram and partial cross-sectional view of the first unlocking fixture of the present embodiment unlocking the first terminal, respectively, with reference to Fig.18 and Fig.19 When the first terminal 12 needs to be replaced or repaired, the unlocking direction of the first terminal 12 is the same as the direction in which the terminal assembly 22 is inserted into the terminal contact slot 125. The first locking member 31 is pulled out of the first housing 11, and the first unlocking jig 81 is inserted from the insertion port 124 into the terminal contact slot 125.

[0119] The first unlocking fixture 81 is provided with an unlocking rack 811 adapted to the insertion port 124 . The unlocking rack 811 is inserted into the terminal receiving groove 110 along the longitudinal direction Y and squeezes the elastic block 1218 of the main body 121 to leave the locking position, thereby pushing the first terminal 12 to loosen and separate from the terminal receiving groove 110 .

[0120] In this embodiment, the unlocking direction of the first terminal is set to be the same as the direction in which the terminal assembly is inserted into the terminal contact slot, so that the first terminals can be distributed according to the maximum number of pins. When the number of pins is the same, the width of the shell is smaller and the occupied area is smaller.

[0121] Embodiment 4:

[0122] Fig. 20 Schematic diagram of the structure of the wire-to-board connector and the second unlocking fixture of this embodiment. Fig. 20 As shown, in some relatively narrow installation spaces, when the first connector 1 needs to be separated from the second connector 2, the second unlocking fixture 82 can be used to unlock. Specifically, the first connector 1 is provided with unlocking positions 118 on the left and right sides of the first housing 11, and the second unlocking fixture 82 is provided with claws 821 correspondingly. The claws 821 are inserted into the unlocking positions 118, and the handle 822 of the second unlocking fixture 82 is flipped upwards, so that the first connector 1 can be separated from the second connector 2.

[0123] In addition, the unlocking position 118 can also be used as a pressing position or a pushing position, and the unlocking position can be pressed by hand to push the first connecting member 1 forward to insert into the second connecting member 2. In some cases where it is inconvenient to manually push the first connecting member 1 to insert into the second connecting member 2, the claw 821 can be inserted into the unlocking position 118, and the first housing 11 can be pushed forward to make the first connecting member 1 and the second connecting member 2 plug and connect together.

[0124] The above contents are merely examples and illustrations of the structure of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these obvious replacement forms all belong to the protection scope of the present invention.

Claims

1. A wire-to-board connector, characterized in that: include: A first connector includes a first housing and a first terminal disposed on the first housing, the first housing is provided with a terminal receiving groove, the first terminal includes a main body and a crimping portion, the main body is disposed in the terminal receiving groove, the main body includes a substrate with a through hole, a first side plate extending from the substrate, and a first force arm formed by bending the first side plate, the first side plate protrudes with a first contact, and the first side plate extends a second force arm after secondary bending, the second force arm is disposed inside the first force arm, the second force arm is provided with a second contact, and the crimping portion is connected to a cable or a flexible cable; A second connector includes a second housing and a terminal assembly disposed on the second housing, the second housing includes a first end, a second end, a first side wall, a second side wall, and an accommodating cavity, the accommodating cavity is recessed from the first end toward the second end, the terminal assembly is inserted into the accommodating cavity from the second end, the terminal assembly is provided with a first contact surface and a second contact surface, the first contact surface and the second contact surface are respectively facing the first side wall and the second side wall; and A locking assembly, comprising a first locking member and a second locking member, wherein the first locking member locks the first terminal in the first housing, and the second locking member is pre-locked in the first housing and locks the first housing to the second housing; The first contact point is closely connected to the second contact surface, and the second contact point is squeezed by the first force arm and closely connected to the first contact surface.

2. The wire-to-board connector according to claim 1, characterized in that: The main body also includes a second side plate, which extends from the other side of the substrate relative to the first side plate, and the second side plate is separated from the first force arm. The second side plate is tightly connected to the first side plate after being bent, and the first side plate, the second side plate, the first force arm and the second force arm surround to form a terminal contact groove.

3. The wire-to-board connector according to claim 2, characterized in that: The second force arm includes a first bending section bent toward the terminal contact slot and a second bending section bent away from the terminal contact slot, and the second force arm is provided with a groove between the first bending section and the second bending section; The first force arm includes a third bending section bent in a direction away from the terminal contact slot, a fourth bending section bent in a direction toward the terminal contact slot, and a fifth bending section that continues to bend in a direction away from the terminal contact slot, and the first force arm is provided with a third contact in the fourth bending section and the fifth bending section, and the third contact abuts against the groove.

4. The wire-to-board connector according to claim 2, characterized in that: The terminal assembly includes a second terminal and a third terminal, the second terminal includes a first pin and a first plug-in portion, the first contact surface and the second contact surface are arranged on two opposite sides of the first plug-in portion, and the first plug-in portion is further provided with a first blanking surface on the lower side; The third terminal includes a second pin, a pin bending section and a second plug-in portion, the first contact surface and the second contact surface are arranged on two opposite side surfaces of the second plug-in portion, and the second plug-in portion is further provided with a second blanking surface on the upper side; The second terminal and the third terminal are inserted into the terminal contact slot through the first plug-in portion and the second plug-in portion respectively.

5. The wire-to-board connector according to claim 1, characterized in that: The first shell is provided with a first mounting surface and a second mounting surface opposite to each other, the first mounting surface is provided with a first convex strip and a first groove, and the first groove is formed in a middle part of the first shell and is recessed from the first mounting surface toward the second mounting surface; The second shell is provided with a second groove and a second convex strip at the first end toward the second end, the second groove is matched and connected to the first convex strip, and the first groove is matched and connected to the second convex strip.

6. The wire-to-board connector according to claim 5, characterized in that: The first shell is provided with a card slot on the second mounting surface, and the card slot is connected to the terminal accommodating slot; the main body is provided with an elastic card block, and the first locking member is provided with a buckle position, the first locking member is inserted into the card slot, and the elastic card block is clamped in the buckle position.

7. The wire-to-board connector according to claim 5, characterized in that: The second locking member comprises a locking body and an elastic arm extending from the locking body, wherein the elastic arm is provided with a stopper and a locking end; The first housing is further provided with a guide bar and a guide groove on the first mounting surface, the stopper is inserted into the guide groove, and the elastic arm is pre-locked on both sides of the first groove along the guide bar; The second shell is further provided with a bulged locking block, the locking block is connected to the second convex strip, and the locking end is snap-connected to the locking block.

8. The wire-to-board connector according to claim 7, characterized in that: The first shell is provided with a crossbeam above the guide bar, and the second locking piece passes through the crossbeam and is pre-locked on the first mounting surface; the locking end and the stop block are not located on the same plane, and the locking end slides along the guide bar, and the locking end and the stop block of the guide bar both have an inclined surface structure.

9. The wire-to-board connector according to claim 2, characterized in that: The unlocking direction of the first terminal is the same as the direction in which the terminal assembly is inserted into the terminal contact slot.

10. The wire-to-board connector according to claim 9, characterized in that: The unlocking jig is provided with an unlocking rack, which is inserted into the terminal contact groove to push the first terminal to loosen and separate from the terminal accommodating groove.

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