CN111355067A

CN111355067A - Turnover buckling and pressing type FPC connector assembly

Info

Publication number: CN111355067A
Application number: CN202010274163.4A
Authority: CN
Inventors: 陈进嵩; 夏国防
Original assignee: Goldenconn Electronic Technology Co Ltd
Current assignee: Goldenconn Electronic Technology Co Ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-06-30

Abstract

The invention relates to a turnover buckling type FPC connector assembly which is composed of an FPC connector, a PCB and an FFC flat cable. The FPC connector comprises an insulating rubber seat, an overturning part and a wiring terminal. The wiring terminal is of an X-shaped structure and is formed by connecting an upper cantilever, a lower cantilever and a middle contact arm. A first inward extending bulge and a second inward extending bulge are respectively extended from the front free ends of the upper cantilever and the lower cantilever and are oppositely arranged. The FFC flat cable is arranged right in front of the middle connection arm and is clamped between the upper cantilever and the lower cantilever. The turnover part is hinged with the insulating rubber base, arranged right behind the middle connection arm and clamped between the upper cantilever and the lower cantilever. Therefore, the connecting terminal with the functions of pressing and fixing the FFC flat cable is simple in structural form and beneficial to manufacturing and molding. In addition, the assembly time of the FPC connector is greatly shortened, and the production and manufacturing cost is further reduced.

Description

Turnover buckling and pressing type FPC connector assembly

Technical Field

The invention relates to the technical field of FPC connector manufacturing, in particular to a turnover buckling and pressing type FPC connector assembly.

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 provide a turnover buckle type FPC connector assembly which has simple structural design and high assembly efficiency, is convenient for FFC flat cables to be installed and disassembled and effectively ensures high reliability in connection.

In order to solve the technical problem, the invention relates to an overturning and buckling type FPC connector assembly which is composed of an 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 and a wiring terminal. Wherein, be provided with FFC winding displacement inserting groove in the insulating rubber seat, and extend from the front to back to be used for cartridge FFC winding displacement. A series of terminal insertion grooves are uniformly distributed along the left and right directions of the FFC flat cable insertion groove and are used for inserting and fixing the wiring terminals. The wiring terminal is of an X-shaped structure and is formed by connecting an upper cantilever, a lower cantilever and a middle contact arm. A first inward extending bulge and a second inward extending bulge are respectively extended from the front free ends of the upper cantilever and the lower cantilever and are oppositely arranged. The FFC flat cable is arranged right in front of the middle connection arm and is clamped between the upper cantilever and the lower cantilever. The turnover part is hinged with the insulating rubber base, arranged right behind the middle connection arm and clamped between the upper cantilever and the lower cantilever.

As a further improvement of the technical scheme of the invention, right opposite to the positions of the two outermost terminals, clamping positioning grooves are respectively and inwardly extended from the left side wall and the right side wall of the FFC flat cable so as to be used for the first inward extending bulge and the second inward extending bulge to be placed in.

As a further improvement of the technical solution of the present invention, the FFC flat cable further comprises a reinforcing plate. The reinforcing plate is attached and fixed with the lower plane of the FFC flat cable. The clamping positioning groove is arranged on the reinforcing plate and continues to extend upwards until the FFC flat cable passes through.

As a further improvement of the technical scheme of the invention, just corresponding to the position of the wiring terminal, an avoiding groove extends inwards from the front side wall of the turnover piece, and meanwhile, a bearing arm for clamping the upper cantilever and the lower cantilever is additionally formed right in front of the avoiding groove. The height direction h of the bearing arm is larger than the thickness direction t of the bearing arm.

As a further improvement of the technical scheme of the invention, a wear-resistant coating is arranged on the side wall of the bearing arm, which is in pre-contact with the upper cantilever and the lower cantilever.

As a further improvement of the technical solution of the present invention, the FPC connector further includes an interposer. And a through groove matched with the plug-in unit in shape extends backwards along the front side wall of the insulating rubber seat. The number of the plug-in components is set to be 2, correspondingly, the number of the penetrating grooves is also set to be 2, and the inserting components are symmetrically distributed on the left side and the right side of the insulating rubber seat. Just for the above-mentioned plug-in components, a fixing piece is provided on the PCB board. When the FPC connector is put in place relative to the PCB, the plug-in passes through the through groove along the front-back direction, and then the lower end part of the plug-in is welded and fixed with the fixing sheet.

As a further improvement of the technical scheme of the invention, a placing sinking groove matched with the turnover piece extends in front of the rear side wall of the insulating rubber seat. A first limiting bulge and a second limiting bulge extend from the rear part of the middle connection arm along the top wall of the lower cantilever. The plug-in components are plug-in and locate and place heavy inslot, and lean on respectively on the left and right lateral wall of placing heavy groove, and the diapire in order to form articulated cavity in order to place heavy groove with assisting, and correspondingly, the bearing arm arranges promptly between first spacing arch and second spacing arch. Hinge bulges matched with the hinge cavities extend outwards from the left side wall and the right side wall of the turnover piece respectively.

Compared with the traditional turnover FPC connector, in the technical scheme disclosed by the invention, the connecting terminal with the functions of pressing and fixing the FFC flat cable is simple in structural form and is beneficial to manufacturing and molding. 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 inward extending protrusion can be close to or away from the second inward extending protrusion by pulling and turning the turning piece, so that the FFC flat cable is clamped and fixed/separated by the wiring terminal, the mounting and dismounting speeds of the FFC flat cable are greatly improved, and meanwhile, the connection/disconnection of the wiring terminal to a conductor on 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 the flip-clip FPC connector assembly of the present invention.

Fig. 3 is a perspective view of the assembly of the flip-chip FPC connector according to the present invention (FFC cable is in a non-fastened state).

Fig. 4 is a top view of fig. 3.

Fig. 5 is a sectional view a-a of fig. 4.

Fig. 6 is a perspective view of the assembly of the flip-chip FPC connector according to the present invention (FFC cable is in a snap-fit state).

Fig. 7 is a top view of fig. 6.

Fig. 8 is a sectional view B-B of fig. 7.

Fig. 9 is a perspective view of the flip-clip FPC connector assembly of the present invention (with the flip-clip removed).

FIG. 10 is a perspective view of the insulating rubber seat of the flip-chip FPC connector assembly of the present invention.

FIG. 11 is a perspective view of a first view of the flip member of the flip-button FPC connector assembly of the present invention.

FIG. 12 is a perspective view of a flip part of the flip-button FPC connector assembly according to the present invention from a second perspective.

Fig. 13 is a perspective view of the connecting terminals of the flip-chip FPC connector assembly according to the present invention.

FIG. 14 is a perspective view of the insert in the flip-chip FPC connector assembly of the present invention.

FIG. 15 is a perspective view of a PCB in the flip-chip FPC connector assembly of the present invention.

FIG. 16 is a perspective view of an FFC cable in the flip-chip FPC connector assembly of the present invention.

Fig. 17 is a schematic view of the hinge connection between the flip member and the insulating rubber base in the flip-chip type FPC connector according to the present invention.

1-FPC connector; 11-an insulating rubber base; 111-FFC flat cable plugging grooves; 112-terminal plugging grooves; 113-a through slot; 114-placing a sink; 115-a hinged cavity; 12-a flip-over member; 121-avoidance slots; 122-bearing arms; 123-hinge projection; 13-a connecting terminal; 131-an upper cantilever; 1311-a first inwardly extending projection; 132-lower cantilever; 1321-a second inwardly extending projection; 1322-a first stop projection; 1323-a second stop bump; 133-middle linkage arm; 14-an insert; 2-a PCB board; 21-a fixing sheet; 3-FFC flat cable; 31-clamping a positioning groove; 32-reinforcing plate.

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.

The present invention will be described in detail with reference to the following embodiments, and fig. 3 shows a perspective view (the FFC cable is in a non-engaging state) of the flip-chip FPC connector assembly according to the present invention, which is composed of the FPC connector 1, the PCB 2 and the FFC cable 3. The FFC flat cable 3 is inserted into the FPC connector 1 and integrally fixed on the PCB 2.

Fig. 2 shows an exploded view of the flip-chip type FPC connector assembly according to the present invention, and it can be seen that the FPC connector 1 is mainly composed of several parts, such as an insulating rubber base 11 (shown in fig. 10), a flip-chip 12 (shown in fig. 11 and 12), and a connection terminal 13 (shown in fig. 13). The insulating rubber base 11 is provided with an FFC flat cable inserting groove 111 therein, and extends from front to back for inserting the FFC flat cable 3. A series of terminal insertion grooves 112 are uniformly formed along the left and right directions of the FFC bus bar insertion groove 111 for inserting and fixing the connection terminals 13. It should be emphasized that the connecting terminal 13 has an "X-shape" structure, and is formed by connecting an upper cantilever 131, a lower cantilever 132 and a middle connecting arm 133. First and second inwardly extending

protrusions

1311 and 1321 extend from the front free ends of the upper and

lower cantilevers

131 and 132, respectively, and are disposed opposite to each other. The FFC bus 3 is arranged right in front of the middle connection arm 133, and is sandwiched between the upper suspension arm 131 and the lower suspension arm 132. The turnover part 12 is hinged to the insulating rubber base 11, disposed right behind the middle connection arm 133, and also sandwiched between the upper suspension arm 131 and the lower suspension arm 132.

In the actual operation process, when the FFC flat cable 3 needs to be locked, the first inward extending protrusion 1311 can be closed relative to the second inward extending protrusion 1321 by pulling and turning the turning piece 12 clockwise, so that the FFC flat cable 3 is clamped and fixed by the connecting terminal 13 (as shown in fig. 6, 7 and 8); when the FFC flat cable 3 needs to be unlocked, the first inward extending protrusion 1311 can be separated from the second inward extending protrusion 1321 by pulling and turning the turning piece 12 in the counterclockwise direction, so that the connection terminal 13 is separated from the FFC flat cable 3, and the FFC flat cable 3 is unlocked (as shown in fig. 3, 4 and 5).

As can be seen from the above description, the structural form of the flip 12 itself is particularly important for the normal execution of the locking and unlocking process of the FFC bus 3, and therefore, a preferred design form of the flip 12 is proposed in the present invention, which is as follows: an avoiding groove 121 extends inward from the front side wall of the flip member 12 at a position corresponding to the terminal 13, and a force-bearing arm 122 for clamping the upper arm 131 and the lower arm 132 is additionally formed right in front of the avoiding groove 121 (see fig. 11 and 12). The height dimension h of the force-bearing arm 122 is greater than the thickness dimension t. Therefore, on the premise of ensuring the smooth execution of the locking and unlocking processes of the FFC flat cable 3, the design structure is simplified to the maximum extent, so as to reduce the molding difficulty and the manufacturing cost.

As is known, in the whole life process of the FPC connector 1, the locking/unlocking operation of the FFC bus bar 3 needs to be repeatedly performed for many times, and in the past, the outer surface of the force-bearing arm 122 is inevitably worn, so that the fitting accuracy with the connection terminal 13 is affected, and the locking stability and reliability of the FFC bus bar 3 are affected. In view of this, a wear-resistant coating (not shown in the figure) may be further disposed on the side wall of the force-bearing arm 122, which is in pre-contact with the upper cantilever 131 and the lower cantilever 132, so as to effectively reduce the relative friction coefficient between the force-bearing arm 122 and the connection terminal 13, and thus, on one hand, the wear rate of the force-bearing arm 122 can be reduced to a certain extent, so as to ensure the precision of the fit between the force-bearing arm 122 and the connection terminal 13; on the other hand, the turnover piece 12 is convenient to pull, and the operation difficulty is reduced.

In order to ensure the connection reliability of the FPC connector 1 and the PCB 2, an interposer 14 (as shown in fig. 2, 3, 6, 10, and 14) may be further added to the FPC connector. A through slot 113 matched with the shape of the plug-in 14 extends backwards along the front side wall of the insulating rubber seat 11. The number of the plug-ins 14 is set to 2, and correspondingly, the number of the through slots 113 is also set to 2, and the through slots are symmetrically distributed on the left side and the right side of the insulating rubber base 11. With respect to the above-described insert 14, a fixing piece 21 is provided on the upper plane of the PCB board 2 (as shown in fig. 15). When the FPC connector 1 is put in place with respect to the PCB 2, the plug 14 passes through the through groove 113 in the front-rear direction, and then, the lower end portion thereof is fixed by soldering to the fixing piece 21.

It should be noted that various designs can be adopted to realize the hinge joint of the turnover part 12 and the insulating rubber seat 11 according to practical situations, however, an optimal design is recommended in the present embodiment, as shown in fig. 17, which is as follows: a placing sink groove 114 (shown in fig. 10) matched with the turnover part 12 extends along the front of the rear side wall of the insulating rubber seat 11. Behind the middle link arm 133, a first limit projection 1322 and a second limit projection 1323 (shown in fig. 13) extend along the top wall of the lower suspension arm 132. The insert 14 is inserted into the placement sinking groove 114 and abuts against the left and right side walls of the placement sinking groove 114, respectively, and the bottom wall of the placement sinking groove 114 is used to form the hinge cavity 115 (as shown in fig. 9), and correspondingly, the force-bearing arm 122 is disposed between the first limiting projection 1322 and the second limiting projection 1323 (as shown in fig. 4, 5, 7 and 8). Hinge protrusions 123 (shown in fig. 11 and 12) are extended from the left and right side walls of the flip member 12 to match with the hinge cavities 115. Therefore, on one hand, the turnover part 12 and the insulating rubber seat 11 have simpler design structures, and are beneficial to manufacturing and molding; on the other hand, the turnover piece 12 is convenient to assemble on the insulating rubber base 11, and the assembly application is reduced; more importantly, through adopting above-mentioned technical scheme to set up, in the process of actually tearing open, adorning FFC winding displacement 3, upset 12 is difficult for deviating from in the insulating rubber seat 11, ensures both articulated reliability of connecting.

In the above technical solution, the FFC flat cable 3 is locked by the elastic pressing force of the connection terminal 13, which not only greatly improves the mounting and dismounting speed of the FFC flat cable 3, but also realizes the on/off of the connection terminal 13 to the conductor on the FFC flat cable 3, effectively optimizes the design structure of the FPC connector 1, but also has the following disadvantages: when the FFC flat cable 3 is subjected to a pulling force, the FFC flat cable 3 is easily separated from the common clamping of the first inward extending protrusion 1311 and the second inward extending protrusion 1321, so that the FFC flat cable 3 is loosened. In view of this, as a further optimization of the above technical solution, with respect to the positions of the two outermost terminals 13, the clamping positioning grooves 31 are respectively extended inward from the left and right side walls of the FFC flat cable 3 for the first inward extending protrusion 1311 and the second inward extending protrusion 1321 to be inserted, so as to realize the clamping connection of the FFC flat cable 3 (as shown in fig. 5, 8 and 16).

In order to improve the structural strength of the clamping positioning groove 31, prevent the clamping positioning groove from being pulled apart, and ensure the connection stability of the FFC flat cable 3, a reinforcing plate 32 may be additionally added to the FFC flat cable 3. The reinforcing plate 32 is abutted and fixed to the lower plane of the FFC flat cable 3. The snap-fit positioning groove 31 is opened on the reinforcing plate 32 and continues to extend upward until it passes through the FFC flat cable 3 (as shown in FIG. 16).

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. A turnover buckle type FPC connector assembly is composed of an 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 piece and a wiring terminal; 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 left and right directions of the FFC flat cable insertion groove and are used for inserting and fixing the wiring terminal; the wiring terminal is of an X-shaped structure and is formed by connecting an upper cantilever, a lower cantilever and a middle contact arm; a first inward extending bulge and a second inward extending bulge respectively extend from the front free ends of the upper cantilever and the lower cantilever and are oppositely arranged; the FFC flat cable is arranged right in front of the middle connection arm and is clamped between the upper cantilever and the lower cantilever; the overturning part is hinged with the insulating rubber seat, arranged right behind the middle connection arm and clamped between the upper cantilever and the lower cantilever.

2. The flip-chip FPC connector assembly of claim 1, wherein a clamping positioning groove is formed by extending inward from the left and right side walls of the FFC cable for receiving the first and second inward extending protrusions, respectively, at two outermost terminal positions.

3. The flip-flop FPC connector assembly of claim 2, wherein said FFC flex further comprises a stiffener; the reinforcing plate is attached to and fixed with the lower plane of the FFC flat cable; the clamping positioning groove is arranged on the reinforcing plate and continues to extend upwards until the FFC flat cable passes through.

4. The flip-chip FPC connector assembly according to any one of claims 1 to 3, wherein an escape groove is extended inward from a front sidewall of the flip-chip just corresponding to the terminal position, and a force-receiving arm for clamping the upper arm and the lower arm is additionally formed just in front of the escape groove; the height direction h of the bearing arm is larger than the thickness direction t of the bearing arm.

5. The flip-flop FPC connector assembly of claim 4, wherein an abrasion resistant coating is provided on the force-bearing arm on a sidewall thereof in pre-contact with the upper cantilever and the lower cantilever.

6. The flip-flop FPC connector assembly of claim 4, wherein said FPC connector further comprises an interposer; a through groove matched with the plug-in unit in shape extends backwards along the front side wall of the insulating rubber seat; the number of the plug-in components is set to be 2, correspondingly, the number of the through grooves is also set to be 2, and the plug-in components are symmetrically distributed on the left side and the right side of the insulating rubber seat; a fixing sheet is arranged on the PCB right opposite to the plug-in unit; when the FPC connector is put in place relative to the PCB, the plug-in passes through the through groove along the front-back direction, and then the lower end part of the plug-in is welded and fixed with the fixing sheet.

7. The flip-flop FPC connector assembly of claim 6, wherein a receiving recess adapted to the flip-flop is extended forward along a rear sidewall of the rubber insulating housing; a first limiting bulge and a second limiting bulge extend from the rear part of the middle connection arm along the top wall of the lower cantilever; the plug-in unit is inserted into the placing sinking groove, is respectively attached to the left side wall and the right side wall of the placing sinking groove, and is assisted with the bottom wall of the placing sinking groove to form a hinged cavity; correspondingly, the force bearing arm is arranged between the first limit bulge and the second limit bulge; hinge protrusions matched with the hinge cavities extend outwards from the left side wall and the right side wall of the turnover piece respectively.