CN111817070A

CN111817070A - Automatic locking structure suitable for FPC connector

Info

Publication number: CN111817070A
Application number: CN202010692360.8A
Authority: CN
Inventors: 邱显钰; 钱金; 徐春艳
Original assignee: Cvilux Technology Suzhou Co ltd
Current assignee: Cvilux Technology Suzhou Co ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2020-10-23
Anticipated expiration: 2040-07-17
Also published as: CN111817070B

Abstract

The invention relates to an automatic locking structure suitable for an FPC connector, which consists of the FPC connector, a PCB and an FFC flat cable. The FPC connector comprises an insulating rubber seat, a turnover piece, a first fixing piece and a second fixing piece. First mounting and the mutual mirror image of second mounting are arranged in the left and right sides of insulating rubber seat, are formed by connecting according to the preface fixed part, connection transition portion, bullet piece portion and joint portion. The turnover part comprises a main body part, a first turnover function part and a second turnover function part. The first overturning function part and the second overturning function part are hinged to the insulating rubber seat at the same time, and are respectively and elastically abutted against the positions right below the two elastic sheet parts, and the cross sections of the first overturning function part and the second overturning function part are in a long waist shape. In the actual operation process, the first fixing piece and the second fixing piece are forced to be elastically deformed by pulling the turnover piece, so that the two clamping parts can simultaneously perform insertion/disengagement movement relative to the FFC flat cable, and further the locking/unlocking operation of the FFC flat cable is realized.

Description

Automatic locking structure suitable for FPC connector

Technical Field

The invention relates to the technical field of FPC connector manufacturing, in particular to an automatic locking structure suitable for an FPC connector.

Background

A Flexible Flat Cable (FFC) is a signal transmission component, which has the advantages of being able to be bent at will and high in signal transmission, and thus is widely used in many electronic products. The flexible flat cable is used in combination with the electronic connector by means of the FPC connector to transmit signals from one end to the other end, so that the purpose of signal transmission is achieved. The method is generally applied to the fields of various digital communication products, portable electronic products, computer peripheral equipment, measuring instruments, automobile electronics and the like.

Chinese patent CN105846191B discloses an FPC connector (as shown in fig. 1), which comprises a plastic main body, terminals, a flip cover and an elastic body, wherein the terminals are inserted into the plastic main body side by side from the front side, the flip cover is installed on the upper part of the plastic main body from the rear side, the elastic body is installed on both ends of the rear side of the plastic main body, the elastic body comprises an elastic body base and a spring plate, rolling parts are arranged at the bottoms of both ends of the front side of the flip cover, rotating shafts are arranged on the outer side surfaces of both ends of the front side of the flip cover, the rotating shafts can pivot, and locking parts are bent. After the FFC flat cable is inserted, the FFC flat cable is prevented from being separated from the FPC connector under the action of external force through the locking action of the locking part, when the FFC flat cable needs to be taken out, the turnover cover is turned over, and the locking part is moved downwards through the rolling elastic sheet of the rolling part, so that the FFC flat cable can be taken out easily and smoothly. However, the implementation structure disclosed by the invention is complex, the manufacturing cost is high, and the assembly is inconvenient, so that the popularization and the application of the method are influenced; in addition, the structural form of the elastomer is complex, which is not conducive to manufacturing and molding, and the subsequent assembly is not easy, so that a skilled person is urgently needed to solve the above problems.

Disclosure of Invention

The invention aims to solve the technical problem of providing an automatic locking structure which is simple in structural design, convenient to manufacture and mold, high in assembly efficiency, convenient to install and disassemble FFC (flexible flat cable) and effectively ensures high reliability in connection and is suitable for an FPC (flexible printed circuit) connector.

In order to solve the technical problem, the invention relates to an automatic locking structure suitable for an FPC connector, which is composed of the FPC connector, a PCB and an FFC flat cable. The FFC flat cable is inserted into the FPC connector and integrally fixed on the PCB. The FPC connector comprises an insulating rubber seat, an overturning part, a wiring terminal, a first fixing part and a second fixing part, wherein an FFC (flexible flat cable) insertion groove is formed in the insulating rubber seat and extends from front to back so as to be used for inserting the FFC. A series of terminal insertion grooves are uniformly distributed along the width direction of the FFC flat cable insertion groove and are used for inserting and fixing the wiring terminals. The first fixing piece is formed by sequentially connecting a first fixing part, a first connecting transition part, a first elastic sheet part and a first clamping part. The first fixing part is clamped and fixed on the left side of the insulating rubber seat so as to fix the position of the first fixing part. The first elastic piece part is formed by continuously extending the first connecting and transition part and folding forwards. The first clamping part is formed by extending the first elastic sheet part downwards. The second fixing piece is formed by sequentially connecting a second fixing part, a second connecting transition part, a second elastic sheet part and a second clamping part. The second fixing part is clamped and fixed on the right side of the insulating rubber seat so as to fix the position of the second fixing part. The second elastic piece part is formed by continuously extending the second connecting transition part and folding forwards. The second clamping part is formed by downward extension of the second elastic sheet part. Just opposite to the positions of the first clamping part and the second clamping part, a first clamping positioning notch and a second clamping positioning notch are respectively and inwardly extended from the left side wall and the right side wall of the FFC flat cable so as to be respectively embedded into the first clamping part and the second clamping part. The turnover part comprises a main body part, a first turnover function part and a second turnover function part. The first turnover function part is formed by extending the left side wall of the main body part outwards continuously, and the cross section of the first turnover function part is long waist-shaped. Assuming that the height dimension of the first flipping function portion is H1 and the length dimension is L1, L1 > H1. The second turnover function part is formed by extending the right side wall of the main body part outwards continuously, and the section of the second turnover function part is also in a long waist shape. And assuming that the height dimension of the second flipping function portion is H2 and the length dimension is L2, L2 > H2. Just correspond to first bullet piece portion, second bullet piece portion, it has first to place groove, second to place the groove to extend downwards by the last plane of insulating rubber seat. The first elastic sheet part is elastically pressed against the upper plane of the insulating rubber seat and is enclosed together with the first placing groove to form a first hinge cavity. The second elastic sheet part is also elastically pressed on the upper plane of the insulating rubber seat and is enclosed together with the second placing groove to form a second hinge cavity. The first overturning function part and the second overturning function part are respectively hinged in the first hinge cavity and the second hinge cavity.

As a further improvement of the technical scheme of the invention, the left and right side walls of the main body part extend outwards continuously and are bent downwards to form a first downward extending limiting part and a second downward extending limiting part. The upper plane of the insulating rubber base extends downwards to form a first avoidance groove and a second avoidance groove which are matched with the first downward extending limiting part and the second downward extending limiting part. The first lower extension limiting part and the second lower extension limiting part extend outwards or/and inwards to form a first positioning protruding part and a second positioning protruding part, and correspondingly, a first limiting flange and a second limiting flange which are respectively matched with the first positioning protruding part and the second positioning protruding part are arranged on the side walls of the first avoidance groove and the second avoidance groove.

As a further improvement of the technical scheme of the invention, the upper side wall and the lower side wall of the first positioning lug boss are subjected to beveling treatment to form a first guide inclined surface and a second guide inclined surface respectively. And beveling the upper side wall and the lower side wall of the first limiting flange to form a third guide inclined surface and a fourth guide inclined surface respectively. And beveling the upper side wall and the lower side wall of the second positioning bulge to form a fifth guide inclined surface and a sixth guide inclined surface respectively. And beveling the upper side wall and the lower side wall of the second limiting flange to form a seventh guide inclined surface and an eighth guide inclined surface respectively.

As a further improvement of the technical solution of the present invention, the front side walls of the first clamping portion and the second clamping portion are processed by beveling to form a ninth guiding inclined surface and a tenth guiding inclined surface, respectively.

As a further improvement of the technical scheme of the invention, the connecting terminal is composed of a plug arm and an elastic pressing arm. The plug-in arm is arranged in the terminal plug-in groove, and the elastic pressing arm exceeds the upper plane of the insulating rubber seat by 0.1-0.3 mm. Just corresponding to binding post, upwards extend by the lower lateral wall of main part and dodge the recess by a series of third. The third avoidance groove penetrates along the front-back direction. The turnover part also comprises a bearing arm. The bearing arm is connected between the left side wall and the right side wall of the front end of each third avoidance groove. The elastic pressing arm is arranged in the third avoiding groove and elastically presses against the bearing arm.

As a further improvement of the technical scheme of the invention, a first fixing groove and a second fixing groove which are respectively used for placing and limiting the first fixing part and the second fixing part extend downwards from the upper plane of the insulating rubber base.

As a further improvement of the technical solution of the present invention, at least 2 first clamping arms are continuously and downwardly extended from a lower plane of the first fixing portion, and the first clamping arms are arranged at intervals, and correspondingly, first insertion notches adapted to the first clamping arms are downwardly extended from a bottom wall of the first fixing groove. At least 2 second clamping arms which are arranged at intervals extend downwards continuously from the lower plane of the second fixing part, and correspondingly, second inserting notches matched with the second clamping arms extend downwards from the bottom wall of the second fixing groove. At least 1 third clamping arm extends outwards from the outer side surface of the first fixing part, and correspondingly, a third inserting notch matched with the third clamping arm extends outwards from the side wall of the first fixing groove. At least 1 fourth clamping arm extends outwards from the outer side surface of the second fixing part, and correspondingly, a fourth inserting notch matched with the fourth clamping arm extends outwards from the side wall of the second fixing groove.

Compared with the traditional turnover FPC connector, the turnover FPC connector has the advantages that the structural form is simple, and manufacturing and molding of parts are facilitated. In addition, the first fixing piece and the second fixing piece can be directly attached and fixed to the insulating rubber base without reserving a movable space, so that the overall thickness and size of the FPC connector are effectively reduced, and the arrangement and design of an assembly space of the FPC connector in a later period are facilitated. In addition, through adopting above-mentioned technical scheme to set up, greatly shortened the assemble duration of FPC connector, and then reduced manufacturing cost. In the actual operation process, the first fixing piece and the second fixing piece can be elastically deformed by pulling and overturning the overturning piece, so that the first clamping portion and the second clamping portion are forced to perform insertion/disengagement motion relative to the FFC flat cable, and clamping, fixing and disengaging of the FFC flat cable are realized, the mounting and dismounting speeds of the FFC flat cable are greatly improved, and meanwhile, synchronous on/off of the wiring terminal to the FFC flat cable is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of a flip-up FPC connector according to the prior art.

Fig. 2 is an exploded view of an automatic latching structure suitable for an FPC connector in the present invention.

Fig. 3 is an exploded view of the FPC connector in the automatic latching structure suitable for the FPC connector according to the present invention.

FIG. 4 is a perspective view of an insulating rubber seat in an automatic locking structure for an FPC connector according to the present invention.

Fig. 5 is a top view of fig. 4.

Fig. 6 is a sectional view a-a of fig. 5.

FIG. 7 is an enlarged view of part I of FIG. 6,

Fig. 8 is a partial enlarged view II of fig. 6.

Fig. 9 is a perspective view of the flip member in the automatic latching structure for FPC connectors according to the present invention.

Fig. 10 is a front view of fig. 9.

Fig. 11 is a partially enlarged view III of fig. 10.

Fig. 12 is an enlarged view of a portion IV of fig. 10.

Fig. 13 is a top view of fig. 9.

Fig. 14 is a sectional view B-B of fig. 13.

Fig. 15 is a perspective view of a terminal block in an automatic latching structure for an FPC connector according to the present invention.

FIG. 16 is a perspective view of a first fixing member of the automatic locking structure for FPC connector according to the present invention.

FIG. 17 is a perspective view of another perspective of the first fixing member of the automatic locking structure for FPC connector according to the present invention.

FIG. 18 is a perspective view of a second fixing member of the automatic locking structure for FPC connector according to the present invention.

FIG. 19 is a perspective view of another perspective of the second fixing member in the automatic latching structure for FPC connector according to the present invention.

Fig. 20 is a perspective view illustrating the assembly of the FPC connector in the automatic latching structure of the FPC connector according to the present invention.

Fig. 21 is a top view of fig. 20.

Fig. 22 is a cross-sectional view C-C of fig. 21.

Fig. 23 is a cross-sectional view taken along line D-D of fig. 21.

Fig. 24 is a cross-sectional view E-E of fig. 21.

Fig. 25 is a perspective view of an FFC bus bar in an automatic latching structure for an FPC connector according to the present invention.

Fig. 26 is a perspective view illustrating the automatic latching structure for the FPC connector according to the present invention.

Fig. 27 is a top view of fig. 26.

Fig. 28 is a sectional view F-F of fig. 27.

Fig. 29 is a sectional view taken along line G-G of fig. 27.

1-FPC connector; 11-an insulating rubber base; 111-FFC flat cable plugging grooves; 112-terminal plugging grooves; 113-a first holding tank; 114-a second resting groove; 115-a first avoidance groove; 1151-a first limiting flange; 11511-a third guide ramp; 11512-a fourth guide ramp; 116-a second avoidance groove; 1161-a second limiting flange; 11611-a seventh guide ramp; 11612-an eighth guide ramp; 117-first fixing groove; 1171-a first grafting gap; 1172-a third splicing gap; 118-a second fixing groove; 1181-a second insertion notch; 1182-a fourth insertion notch; 12-a flip-over member; 121-a body portion; 1211-a first lower extension limiting part; 12111-first locating boss; 121111-first guide ramp; 121112-second guide ramp; 1212-a second lower limit portion; 12121-second positioning boss; 121211-fifth guide ramp; 121212-sixth guide ramp; 1213-third avoiding grooves; 122-a first flip function; 123-a second flipping function; 124-bearing arms; 13-a connecting terminal; 131-a plug arm; 132-a resilient pressing arm; 14-a first fixture; 141-a first fixed part; 1411-a first snap arm; 1412-third snap arm; 142-a first connection transition; 143-a first tab portion; 144-a first snap-in part; 1441-ninth guide ramp; 15-a second fixture; 151-second fixing part; 1511-second snap arm; 1512-a fourth snap arm; 152-a second connection transition; 153-a second tab portion; 154-a second snap-in portion; 1541-tenth guide ramp; 16-a first hinge chamber; 17-a second articulation lumen; 2-FFC flat cable; 21-a first clamping positioning notch; 22-second snap locating notch.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Fig. 2 and 26 respectively show an explosion diagram and a three-dimensional assembly diagram of the automatic locking structure of the FPC connector according to the present invention, and it is understood that the automatic locking structure of the FPC connector comprises an FPC connector 1, a PCB (not shown) and an FFC bus bar 2. The FFC flat cable 2 is inserted into the FPC connector 1 and integrally fixed on the PCB, so that signal transmission is realized.

Fig. 3 and 20 respectively show an explosion diagram and a three-dimensional assembly diagram of the FPC connector in the automatic locking structure of the FPC connector according to the present invention, and it is known that the FPC connector mainly comprises an insulating rubber seat 11, an overturning member 12, a connecting terminal 13, a first fixing member 14, and a second fixing member 15, wherein an FFC cable inserting groove 111 is formed in the insulating rubber seat 11 and extends in a forward and backward direction for inserting the FFC cable 2. A series of terminal insertion grooves 112 are uniformly formed along the width direction (i.e., the left and right direction) of the FFC bus bar insertion groove 111 for inserting and fixing the connection terminals 13.

Fig. 16 and 17 are schematic perspective views respectively illustrating two different viewing angles of the first fixing element in the automatic locking structure for the FPC connector according to the present invention, in which it can be seen that the first fixing element 14 is formed by sequentially connecting a first fixing portion 141, a first connection transition portion 142, a first elastic piece portion 143, and a first clamping portion 144. The first fixing portion 141 is engaged and fixed to the left side of the insulating rubber base 11, so as to fix the position of the first fixing member 14. The first elastic piece portion 143 is formed by continuously extending the first connection transition portion 142 and being folded back forward. The first clip portion 144 is formed by extending the first elastic piece portion 143 downward.

Fig. 18 and 19 are schematic perspective views respectively illustrating two different viewing angles of the second fixing element in the automatic locking structure for the FPC connector according to the present invention, in which the second fixing element 15 is formed by sequentially connecting a second fixing portion 151, a second connection transition portion 152, a second elastic piece portion 153, and a second clamping portion 154. The second fixing portion 151 is engaged and fixed to the right side of the insulating rubber base 11, so as to fix the position of the second fixing member 15. The second elastic piece portion 153 is formed by continuously extending the second connection transition portion 152 and folding back forward. The second clip portion 154 is formed by extending the second elastic piece portion 153 downward.

Fig. 25 is a schematic perspective view of the FFC bus bar in the automatic locking structure of the FPC connector of the present invention, and it can be seen that a first clamping positioning notch 21 and a second clamping positioning notch 22 extend inward from the left and right side walls of the FFC bus bar 2, respectively. As shown in fig. 26, 27 and 28, when the first fixing member 14 and the second fixing member 15 are fixed to the insulating rubber base 11 and the FFC flat cable 2 is completely inserted into the FFC flat cable insertion groove 111, the first clamping positioning notch 21 and the second clamping positioning notch 22 correspond to the first clamping portion 144 and the second clamping portion 154, so that the first clamping portion 144 and the second clamping portion 154 can be inserted (as shown in fig. 26, 27 and 28).

Fig. 9 is a perspective view of the flip member in the automatic locking structure for FPC connectors according to the present invention, and it can be seen that the flip member is mainly composed of several parts, such as a main body 121, a first flip function part 122, and a second flip function part 123. The first turning function portion 122 is formed by extending the left sidewall of the main body portion 121 outward, and has a long waist-shaped cross section. Assuming that the height dimension of the first flipping function portion 122 is H1 and the length dimension is L1, L1 > H1. The second turning function portion 123 is formed by extending the right sidewall of the main body portion 121 outward, and has a long waist-shaped cross section. And assuming that the height dimension of the second flipping function part 123 is H2 and the length dimension is L2, L2 > H2.

As shown in fig. 4, corresponding to the first elastic sheet portion 143 and the second elastic sheet portion 153, a first placing groove 113 and a second placing groove 114 extend downward from the upper plane of the insulating rubber base 11. The first elastic piece 143 is elastically pressed against the upper surface of the insulating rubber base 11, and encloses the first placing groove 113 to form the first hinge cavity 16. The second elastic piece 153 is also elastically pressed against the upper plane of the insulating rubber seat 11, and encloses the second placing slot 114 together to form the second hinge cavity 17. The first and second flipping functions 122, 123 are respectively hinged in the first and second hinge cavities 16, 17 (as shown in fig. 20-24).

The working principle of the automatic locking structure suitable for the FPC connector is as follows: when the FFC flat cable 2 is locked, the FFC flat cable 2 is pushed to perform a translational motion along the FFC flat cable insertion groove 111, in this process, the first elastic piece portion 143 and the second elastic piece portion 153 are forced to elastically deform under the pushing force of the FFC flat cable 2, and then the first clamping portion 144 and the second clamping portion 154 elastically abut against the upper plane of the FFC flat cable 2 and perform a relative sliding motion until the first clamping portion and the second clamping portion are respectively clamped into the first clamping positioning notch 21 and the second clamping positioning notch 22 which are arranged on the FFC flat cable 2, and meanwhile, the connection terminal 13 is conducted with the FFC flat cable 2 to perform signal transmission; when carrying out the unblock operation to FFC winding displacement 2, operating personnel pulls main part 121 of upset piece 12, meanwhile, set up first upset functional part 122 on it, second upset functional part 123 carries out synchronous revolution motion with following, because the cross-section of both all designs for long waist shape, consequently makes first mounting 14, second mounting 15 all take place adaptability elasticity and open the deformation, and then drive first joint portion 144, second joint portion 154 upwards carries out the displacement motion, deviate from in it is respectively by first joint location breach 21, second joint location breach 22, accomplished the unblock operation to FFC winding displacement 2 promptly.

Compared with the traditional turnover FPC connector, the turnover FPC connector has the advantages that 1) compared with the traditional turnover FPC connector, the turnover FPC connector is simple in structural form, convenient for manufacturing and forming of parts and low in manufacturing cost; 2) the first fixing piece 14 and the second fixing piece 15 can be directly attached and fixed to the insulating rubber base 11 without reserving a movable space, so that the overall thickness size of the FPC connector 1 is effectively reduced, and the arrangement and design of an assembly space of the FPC connector are facilitated in a later period; 3) the assembly time of the FPC connector 1 is greatly shortened, and the production and manufacturing costs are reduced. In the actual operation process, the first fixing member 14 and the second fixing member 15 can be elastically deformed by pulling and turning the turning member 12, so that the first clamping portion 144 and the second clamping portion 154 are forced to perform insertion/disengagement motion relative to the FFC flat cable 2, and the FFC flat cable 2 is clamped, fixed and disengaged, thereby greatly improving the mounting and dismounting speed of the FFC flat cable 2.

As a further optimization of the automatic latching structure for the FPC connector, it is also possible to extend the left and right side walls of the main body 121 outward and bend downward to form a first downward extending stopper 1211 and a second downward extending stopper 1212 (as shown in fig. 10). A first avoidance groove 115 and a second avoidance groove 116 (as shown in fig. 4) are extended downward from the upper plane of the insulating rubber base 11 and are matched with the first downward extending limiting portion 1211 and the second downward extending limiting portion 1212. In this way, when the assembly operation of the first fixing member 14, the second fixing member 15 and the insulating rubber seat 11 is performed, a part of the first fixing member and the second fixing member can be skillfully sunk in the insulating rubber seat 11, thereby further reducing the overall height dimension of the FPC connector 1. The first and

second clip portions

144 and 154 lock the first and second

clip positioning notches

21 and 22 by the weight of the body 121. In addition, the existence of the first downward extending limiting portion 1211 and the second downward extending limiting portion 1212 can effectively prevent the turning-over 12 from generating the "twisting" phenomenon, ensure the accuracy of the relative positions of the first turning-over function portion 122 and the second turning-over function portion 123, and prevent the first turning-over function portion and the second turning-over function portion from being separated from the first hinge cavity 16 and the second hinge cavity 17 due to the unbalanced stress.

As is known, the FPC connector 1 inevitably receives the influence of "vibration" in the actual working process, and it is extremely unstable and is very easy to loose due to the self weight of the main body 121 of the flip-up member 12, and therefore, the first positioning protrusion 12111 and the second positioning protrusion 12121 may extend outward from the first downward extending limiting portion 1211 and the second downward extending limiting portion 1212, and correspondingly, the first limiting rib 1151 and the second limiting rib 1161 (as shown in fig. 6 and 10) respectively matching with the first positioning protrusion 12111 and the second positioning protrusion 12121 are disposed on the side walls of the first avoiding groove 115 and the second avoiding groove 116. Through adopting above-mentioned scheme to set up, can utilize first spacing flange 1151, the spacing flange 1161 of second to realize respectively keeping off of first location bellying 12111, second location bellying 12121 and lean on, and then realized first mounting 14, second mounting 15 for the steadiness of plastic rubber seat 11 buckle, stop FFC winding displacement 2 and take place the pine phenomenon because of "vibrations".

In order to ensure the smooth proceeding of the first positioning protrusion 12111 and the second positioning protrusion 12121 into or out of the first limiting rib 1151 and the second limiting rib 1161 and further ensure the efficiency of the assembly and disassembly of the FFC bus bar 2, the upper and lower sidewalls of the first positioning protrusion 12111 may be chamfered to form a first guiding inclined surface 121111 and a second guiding inclined surface 121112 (as shown in fig. 11). The upper and lower sidewalls of the first stopper rib 1151 are also chamfered to form a third guide slope 11511 and a fourth guide slope 11512, respectively (as shown in fig. 7). The upper and lower sidewalls of the second positioning protrusion 12121 are chamfered to form a fifth guide slope 121211 and a sixth guide slope 121212, respectively (as shown in fig. 12). The upper and lower sidewalls of the second limiting rib 1161 are also beveled to form a seventh guiding inclined surface 11611 and an eighth guiding inclined surface 11612 (as shown in fig. 8).

In addition, as a further optimization of the above technical solution, the front side walls of the first clamping portion 144 and the second clamping portion 154 may be chamfered to form a ninth guiding inclined surface 1441 and a tenth guiding inclined surface 1541 (as shown in fig. 17 and 19), respectively. In this way, in the process of pushing the FFC flat cable 2 to perform the translational motion along the FFC flat cable insertion groove 111, the first clamping portion 144 and the second clamping portion 154 can be automatically lifted under the action of the abutting force, so as to be subsequently and automatically slid into the first clamping positioning notch 21 and the second clamping positioning notch 22.

As shown in fig. 15, the connection terminal 13 is constituted by a plug arm 131 and a resilient pressing arm 132. The plugging arm 131 is disposed in the terminal plugging slot 112, and the elastic pressing arm 132 exceeds the upper plane of the insulating rubber seat 11 by 0.1-0.3mm (as shown in fig. 20). In order to avoid the wire terminals 13 and to reduce the overall molding thickness of the flip 12 as much as possible, a series of third avoidance grooves 1213 may be extended upward from the lower side wall of the main body portion 121 of the flip 12 in correspondence to the wire terminals 13. The third escape groove 1213 penetrates in the front-rear direction (as shown in fig. 13). The flipper 12 further includes a force-bearing arm 124 for ensuring its structural strength. The force-bearing arm 124 is connected between the front left and right side walls of each of the third avoidance grooves 1213 (as shown in fig. 14). The resilient pressing arm 132 is built in the third escape groove 1213 and resiliently presses against the force bearing arm 124 (as shown in fig. 26, 27, 29).

The first fixing element 14 and the second fixing element 15 can be fixed to the insulating rubber base 11 in various ways, as known in the art, but a preferred way is recommended here, in particular as follows: a first fixing groove 117 and a second fixing groove 118 for the first fixing portion 141 and the second fixing portion 151 to be inserted and limited are extended downward from the upper plane of the insulating rubber base 11. At least 2 first clamping arms 1411 arranged at intervals extend downwards from the lower plane of the first fixing portion 141, and correspondingly, first inserting notches 1171 matched with the first clamping arms 1411 extend downwards from the bottom wall of the first fixing groove 117. At least 2 second clamping arms 1511 arranged at intervals extend downwards from the lower plane of the second fixing portion 151, and correspondingly, a second inserting notch 1181 matched with the second clamping arm 1511 extends downwards from the bottom wall of the second fixing groove 118. At least 1 third engaging arm 1412 extends outwards from the outer side of the first fixing portion 141, and correspondingly, a third inserting notch 1172 adapted to the third engaging arm 1412 extends outwards from the sidewall of the first fixing groove 117. At least 1 fourth latching arm 1512 extends outward from the outer side of the second fixing portion 151, and correspondingly, a fourth inserting notch 1182 (shown in fig. 4-6 and 16-19) adapted to the fourth latching arm 1512 extends outward from the side wall of the second fixing groove 118. In this way, the first fixing portion 141 and the second fixing portion 151 are fixed to the insulating rubber base 11 by a snap-fit manner, so that the displacement motion of the first fixing portion and the second fixing portion along the height direction is limited. And the presence of the third and

fourth snap arms

1412, 1512 limit the displacement movement of the first and

second fixtures

14, 15 in the front-back direction. By adopting the technical scheme, the fixing reliability of the first fixing piece 14, the second fixing piece 15 and the insulating rubber seat 11 is ensured, and the time consumed for installing the first fixing piece 14 and the second fixing piece 15 is effectively reduced.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic locking structure suitable for an FPC connector comprises the FPC connector, a PCB and an FFC flat cable; the FFC flat cable is inserted into the FPC connector and integrally fixed on the PCB, and is characterized in that the FPC connector comprises an insulating rubber seat, a turnover part, a wiring terminal, a first fixing part and a second fixing part; the FFC flat cable inserting groove is arranged in the insulating rubber seat and extends from front to back so as to be used for inserting the FFC flat cable; a series of terminal insertion grooves are uniformly distributed along the width direction of the FFC flat cable insertion groove and are used for inserting and fixing the wiring terminal; the first fixing piece is formed by sequentially connecting a first fixing part, a first connecting transition part, a first elastic piece part and a first clamping part; the first fixing part is clamped and fixed on the left side of the insulating rubber seat so as to fix the position of the first fixing part; the first elastic piece part is formed by continuously extending the first connecting transition part and folding forwards; the first clamping part is formed by extending the first elastic sheet part downwards; the second fixing piece is formed by sequentially connecting a second fixing part, a second connection transition part, a second elastic sheet part and a second clamping part; the second fixing part is clamped and fixed on the right side of the insulating rubber seat so as to fix the position of the second fixing part; the second elastic piece part is formed by continuously extending the second connecting transition part and folding forwards; the second clamping part is formed by extending the second elastic sheet part downwards; a first clamping positioning notch and a second clamping positioning notch are respectively and inwardly extended from the left side wall and the right side wall of the FFC flat cable right opposite to the positions of the first clamping part and the second clamping part so as to be respectively embedded into the first clamping part and the second clamping part; the overturning piece comprises a main body part, a first overturning functional part and a second overturning functional part; the first turnover function part is formed by continuously extending the left side wall of the main body part outwards, and the cross section of the first turnover function part is long waist-shaped; assuming that the first flipping function has a height dimension of H1 and a length dimension of L1, L1 > H1; the second turnover function part is formed by continuously extending the right side wall of the main body part outwards, and the section of the second turnover function part is also in a long waist shape; and assuming that the height dimension of the second flipping function part is H2 and the length dimension is L2, then L2 > H2; a first placing groove and a second placing groove extend downwards from the upper plane of the insulating rubber seat and correspond to the first elastic sheet part and the second elastic sheet part; the first elastic sheet part is elastically pressed against the upper plane of the insulating rubber seat and is enclosed together with the first placing groove to form a first hinge cavity; the second elastic sheet part is also elastically pressed against the upper plane of the insulating rubber seat and is enclosed together with the second placing groove to form a second hinge cavity; the first overturning function part and the second overturning function part are respectively hinged in the first hinge cavity and the second hinge cavity.

2. The automatic locking structure for the FPC connector according to claim 1, wherein the left and right sidewalls of the main body extend outward and are bent downward to form a first lower extending limiting portion and a second lower extending limiting portion; a first avoidance groove and a second avoidance groove which are matched with the first downward extension limiting part and the second downward extension limiting part are extended downwards from the upper plane of the insulating rubber base; correspondingly, a first limiting rib and a second limiting rib which are respectively matched with the first positioning protrusion and the second positioning protrusion are arranged on the side wall of the first avoidance groove and the second avoidance groove.

3. The automatic latching structure for FPC connector according to claim 2, wherein the upper and lower side walls of the first positioning protrusion are chamfered to form a first guiding slope and a second guiding slope, respectively; beveling the upper side wall and the lower side wall of the first limiting flange to form a third guide inclined surface and a fourth guide inclined surface respectively; beveling the upper side wall and the lower side wall of the second positioning protruding part to form a fifth guide inclined plane and a sixth guide inclined plane respectively; and beveling the upper side wall and the lower side wall of the second limiting flange to form a seventh guide inclined surface and an eighth guide inclined surface respectively.

4. The automatic latching structure of claim 1, wherein the front side walls of the first and second engaging portions are chamfered to form a ninth and tenth guiding inclined surfaces, respectively.

5. The automatic latching structure for an FPC connector according to any one of claims 1 to 4, wherein said connection terminal is constituted by a plug arm and a resilient pressing arm; the plug-in arm is arranged in the terminal plug-in groove, and the elastic pressing arm exceeds the upper plane of the insulating rubber seat by 0.1-0.3 mm; a series of third avoidance grooves extend upwards from the lower side wall of the main body part just corresponding to the wiring terminal; the third avoidance groove penetrates along the front-back direction; the overturning part also comprises a bearing arm; the force bearing arm is connected between the left side wall and the right side wall of the front end of each third avoidance groove; the elastic pressing arm is arranged in the third avoiding groove and elastically pressed against the bearing arm.

6. The automatic locking structure for the FPC connector according to any one of claims 1 to 4, wherein a first fixing groove and a second fixing groove for the first fixing portion and the second fixing portion to be inserted and limited are extended downward from an upper plane of the insulating rubber base.

7. The automatic locking structure for the FPC connector of claim 6, wherein at least 2 first latching arms are extended downward from the lower plane of the first fixing portion, and correspondingly, a first plugging gap adapted to the first latching arms is extended downward from the bottom wall of the first fixing groove; at least 2 second clamping arms which are arranged at intervals extend downwards continuously from the lower plane of the second fixing part, and correspondingly, second inserting notches matched with the second clamping arms extend downwards from the bottom wall of the second fixing groove; at least 1 third clamping arm extends outwards from the outer side surface of the first fixing part, and correspondingly, a third inserting notch matched with the third clamping arm extends outwards from the side wall of the first fixing groove; at least 1 fourth clamping arm extends outwards from the outer side surface of the second fixing part, and correspondingly, a fourth inserting notch matched with the fourth clamping arm extends outwards from the side wall of the second fixing groove.