JP2007242515A - Electric connector for flat cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connector for a flat cable composed by setting insertion force to zero, and by reducing its height. <P>SOLUTION: This electric connector 10 for a flat cable for electrically connecting conductors of the flat cable to pads of a circuit board is provided with: contacts 12 each having elastic arms 122 and 123; an insulation housing 11 swingably holding the contacts 12; and a pressing plate 13 for receiving an end of the flat cable between the insulation housing 11 and itself. The insulation housing 11 is fixed to the circuit board with the flat cable received therein. The elastic arms 122 and 123 have: a contact 125 for a circuit board pressed against the pad on the circuit board surface; and a contact 126 for a flat cable contacting the conductor of the flat cable by reactive force generated by pressing the contact 125 for a circuit board against the pad, and arranged at a position different from that of the contact 125 for a circuit board in the extending direction of the elastic arms 122 and 123. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electrical connector for a flat cable that is attached to the surface of a circuit board provided with a pad and electrically connects the conductor of the flat cable and the pad.

  2. Description of the Related Art Conventionally, an electric connector for a flat cable that connects a flat cable typified by a flexible printed circuit (FPC) to a circuit board is known. For example, Patent Document 1 discloses a connector including a housing that forms a space for receiving an FPC between a circuit board and a contact protruding from the housing. When the FPC is attached to this connector, the FPC is pushed between the housing and the circuit board with the FPC conductor interfering with the contact. For this reason, the conductor of the FPC may be cut and damaged.

In order to prevent the conductor from being damaged, there has been proposed a zero insertion force (ZIF) type connector in which the contact does not interfere with the FPC conductor when the FPC is inserted. For example, Patent Document 2 discloses an FPC ZIF connector including a bifurcated contact composed of an upper arm and a lower arm, and a lever that is opened and closed by a user in the vertical direction. In this FPC ZIF connector, the lower arm is solder-connected to the circuit board, and when the lever is closed after the FPC is inserted between the upper arm and the lower arm of the bifurcated contact, the upper arm is Lower and contact the conductor of the FPC. For this reason, the damage of the conductor accompanying FPC insertion is prevented.
JP 2005-141956 A JP 2005-108465 A

  However, the FPC ZIF connector disclosed in Patent Document 2 elastically displaces between the position where the upper arm of the bifurcated contact contacts the FPC and the position where it does not contact, in addition to the height of the space necessary for opening and closing the lever. The height of the space required for the FPC, the height of the space into which the FPC is inserted, and the height of the lower arm connected to the circuit board are each independently required, so that it is difficult to reduce the height of the connector.

  In view of the above circumstances, an object of the present invention is to provide an electric connector for a flat cable that has zero insertion force and is reduced in height.

An electrical connector for a flat cable according to the present invention that achieves the above object is an electrical connector for a flat cable that is attached to the surface of a circuit board provided with a pad and electrically connects the conductor of the flat cable and the pad. ,
A contact having an elastic arm that contacts the pad of the circuit board and the conductor of the flat cable;
An insulating housing that holds the contact in a swingable manner and guides the end of the flat cable to position the end of the flat cable;
A pressing plate fixed to the insulating housing and receiving the end of the flat cable between the insulating housing in cooperation with the insulating housing;
The insulating housing is fixed to the circuit board in a state of receiving the end of the flat cable between the pressing plate and
The elastic arm is
Circuit board contacts pressed against the pads on the circuit board surface;
The circuit board contact is in contact with the conductor of the flat cable by the reaction force pressed against the pad, and the circuit board contact is arranged at a different position in the direction in which the elastic arm extends. It is characterized by having.

  In the flat cable electrical connector of the present invention, the insulating housing is fixed to the circuit board in a state where the flat cable is received, so that the circuit board contact of the contact held swayably is pressed against the pad. The contact for the flat cable comes into contact with the conductor of the flat cable due to the reaction force. For this reason, the flat cable contact does not interfere with the conductor when the flat cable is received in the insulating housing. Therefore, stripping of the conductor can be suppressed by the zero insertion force. Further, in the flat cable electrical connector of the present invention, the contact for the flat board is pressed against the pad because the contact for the flat cable is arranged at a position different from the contact for the circuit board in the direction in which the elastic arm extends. The trajectory displaced when the elastic arm is bent does not overlap the trajectory displaced when the elastic arm is bent when the flat cable contact is pushed back to the flat cable. Therefore, between the circuit board and the flat cable, the height of the trace of the contact for the circuit board and the height of the trace of the contact for the flat cable can be arranged in parallel in the extending direction of the elastic arm, and the height is reduced. An electrical connector for a flat cable is realized.

  Here, in the electric connector for flat cable according to the present invention, the contact is such that the elastic arm is longer than the first elastic arm provided with the circuit board contact at the end and the first elastic arm. The flat cable contact preferably has a bifurcated shape including a second elastic arm provided at the end.

  Since the contact has a bifurcated shape, each of the first elastic arm and the second elastic arm bends over a long portion from the bifurcated branch point to the end, so that the respective end portions The amount of elastic displacement of the circuit board contact and the flat cable contact provided on the cable increases. Further, since the second elastic arm provided with the contact for the flat cable is longer than the first elastic arm provided with the contact for the circuit board, when the insulating housing is fixed to the circuit board, The displacement amount of the flat cable contact due to the contact being pressed against the pad and the contact swinging is larger than the displacement of the circuit board contact. Therefore, the flat cable contact sufficiently absorbs the difference in thickness of each flat cable product and reliably contacts the conductor.

In addition, the flat cable electrical connector of the present invention includes a fixture that is disposed on the circuit board and fixes the insulating housing to the circuit board by fixing the pressing plate.
It is preferable that both the pressing plate and the fixture are made of a metal material.

  Since the pressing plate that receives the end portion of the flat cable between the insulating housing and the fixing member is made of a metal material, the end portion of the flat cable is electromagnetically shielded by the pressing plate.

  As described above, according to the present invention, an electric connector for a flat cable with zero insertion force and a low profile is realized.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an external view of an FPC connector according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG.

  1 and 2 show the FPC connector 10 mounted on the circuit board 20 and having the FPC 30 inserted therein. Here, the surface of the FPC connector 10 into which the FPC 30 is inserted is defined as the front surface, and the surface in contact with the circuit board 20 is defined as the bottom surface. A plan view of the FPC connector 10 is shown in part (a) of FIG. 1, a rear view is shown in part (b), and a left side view is shown in part (c).

  The FPC connector 10 shown in FIG. 1 and FIG. 2 is attached to the surface of a circuit board 20 that is a multilayer wiring board provided with pads 21 (see FIG. 2), and the pads 21 of the circuit board 20 and the FPC 30 as a flat cable It electrically connects the conductor and includes an insulating housing 11, a contact 12, a pressing plate 13, and a fixture 14.

  As shown in FIG. 2, the insulating housing 11 guides the end portion 30 a of the FPC 30 and positions it in the insertion direction and the width direction of the FPC 30, and includes an FPC receiving surface 114 that guides the end portion 30 a of the FPC 30, and the FPC 30. The first step surface 114a against which the tip 30b of the first bump 30b is abutted. The positioning of the FPC 30 will be described later. A pivot 111 for holding the contact 12 is formed inside the insulating housing 11.

  The contact 12 is for contacting both the pad 21 of the circuit board 20 and the conductor of the FPC 30, has a notch 121, and the pivot 111 of the insulating housing 11 is fitted into the notch 121. Thus, it is held by the insulating housing 11. The contact 12 has a shape extending in a cantilever shape from a notch portion 121 in which the pivot 111 is fitted, and is composed of a first elastic arm 122 and a second elastic arm 123. 124. A circuit board contact 125 that contacts the pad 21 of the circuit board 20 is provided at the end of the first elastic arm 122, and a flat cable that contacts the conductor of the FPC 30 at the end of the second elastic arm 123. A contact point 126 is provided. When the FPC connector 10 is mounted on the circuit board 20, the circuit board contact 125 is pressed against the pad 21 on the surface of the circuit board 20 due to the elasticity of the elastic arm 124, and the flat cable contact 126 is a conductor of the FPC 30. Pressed against and touching. The contact 12 electrically connects the pad 21 of the circuit board 20 and the conductor 32 of the FPC 30 via the first elastic arm 122 and the second elastic arm 123. Since the second elastic arm 123 is longer than the first elastic arm 122, the circuit board contact 125 and the flat cable contact 126 provided at each end thereof are the first elastic arm 122 and the second elastic arm 122, respectively. The elastic arms 123 are arranged at different positions in the extending direction.

  The pressing plate 13 is fixed to the insulating housing 11, and receives the end 30 a of the FPC 30 between the insulating housing 11 in cooperation with the insulating housing 11.

  Two fixing devices 14 are arranged on the circuit board 20, and by engaging with the pressing plate 13 fixed to the insulating housing 11, the insulating housing 11 that receives the FPC 30 between the pressing plate 13 is provided. Fix to the circuit board 20.

  The FPC connector 10 shown in FIGS. 1 and 2 has a pressing plate 13 attached to an insulating housing 11 that holds a contact 12, and then an FPC 30 is inserted. The insulating housing 11 into which the FPC 30 is inserted is used as a circuit board. It is completed by being fixed to the circuit board 20 by a fixing tool 14 arranged in advance on the circuit board 20. Hereinafter, the detail of each member which comprises FPC connector 10 is demonstrated along the above-mentioned procedure.

  FIG. 3 is a view showing an insulating housing and contacts constituting the FPC connector of FIG.

  3 shows a plan view of the insulating housing 11, part (b) shows a rear view, part (c) shows a left side view, and part (d) shows part (a). AA sectional view in FIG.

  The insulating housing 11 is a substantially rectangular plate-shaped member molded from an insulating synthetic resin, and the FPC 30 (see FIG. 1) is inserted into the upper surface 113 opposite to the bottom surface 112 in contact with the circuit board. A part of the side is formed as an FPC receiving surface 114 for guiding the FPC 30 so as to be one step lower than the upper surface 113, and the insertion direction of the FPC 30 (see FIG. 2) is at the step at the boundary between the upper surface 113 and the receiving surface 114. The first step surface 114a orthogonal to the FPC 30 and the insertion direction of the FPC 30 are parallel to each other, the two second step surfaces 114b disposed at substantially the same interval as the width of the FPC 30, and the insertion direction of the FPC 30 are disposed obliquely. A third step surface 114c is formed. In addition, two lock portions 115 for retaining the inserted FPC 30 are provided on both sides of the insulating housing 11 toward the front side where the FPC 30 is inserted. Further, two fixing pins 116 for fixing the pressing plate 13 (see FIG. 1) protrude from the upper surface 113 of the insulating housing 11. Ten contact grooves 118 extending in parallel to the direction in which the FPC 30 (see FIG. 1) is inserted are formed on the bottom surface 112 of the insulating housing 11, and a part of the contact grooves 118 penetrates the FPC receiving surface 114. ing. The pivot 111 is formed in the contact groove 118 so that the cross section protrudes toward the bottom surface 112. Ten contacts 12 are arranged in the insulating housing 11 at a predetermined interval, and each of the ten contacts 12 is fitted in the pivot 111 so as to swing vertically in the contact groove 118. It is held so that it can move.

  The contact 12 is a member formed by punching a metal plate. As shown in part (d) of FIG. 3, the contact 12 is configured so that the first elastic arm 122 and the second elastic arm 123 are placed on the bottom surface 112 side by their own weight when the insulating housing 11 is not fixed to the circuit board. At this time, the circuit board contact 125 provided at the end of the first elastic arm 122 protrudes downward from the bottom surface 112. In this state, the flat cable contact 126 provided at the end of the second elastic arm 123 is positioned at substantially the same height as the FPC receiving surface 114.

  Here, the positioning of the FPC 30 will be described. In a state where the FPC 30 is inserted into the FPC connector 10 (see FIG. 2), the tip 30b of the FPC 30 is abutted against the first step surface 114a, whereby the FPC 30 is positioned in the insertion direction. At this time, the FPC 30 is also positioned in the width direction by the second step surface 114b. As a result, the conductors (see FIG. 6) arranged at equal intervals on the FPC 30 are guided to positions where they can contact the corresponding contacts 12. Note that the FPC 30 is easily inserted because the third step surface 114c is formed obliquely with respect to the insertion direction of the FPC 30.

  4 is an external view showing a pressing plate constituting the FPC connector of FIG.

  4 shows a plan view of the pressing plate 13, part (b) shows a rear view, and part (c) shows a left side view.

  The pressing plate 13 is formed by punching and bending a metal plate, and has a shape and size that covers the upper surface 113 of the insulating housing 11 (see FIG. 3). The pressing plate 13 is formed with two fixing holes 131 into which fixing pins 116 (see FIG. 3) provided on the upper surface 113 of the insulating housing 11 are fitted. A fixing piece 132 is provided to be fixed to (see FIG. 1).

  FIG. 5 is an external view showing an insulating housing and a pressing plate constituting the FPC connector of FIG.

  Part (a) of FIG. 5 is a plan view of the insulating housing 11 to which the pressing plate 13 is fixed, part (b) is a rear view, part (c) is a bottom view, and part (d) is a left side. The figure and part (e) show a cross-sectional view taken along line AA in part (a).

  The pressing plate 13 is fixed to the insulating housing 11 when the fixing pin 116 of the insulating housing 11 is fitted into the fixing hole 131. As shown in part (e) of FIG. 5, a space for receiving FPC is formed between the pressing plate 13 fixed to the insulating housing 11 and the FPC receiving surface 114 of the insulating housing 11. As shown in part (c) of FIG. 5, the circuit board contacts 125 of the ten contacts 12 are staggered in two rows on the bottom surface 112 of the insulating housing 11.

  FIG. 6 is a diagram for explaining how the FPC is inserted into the insulating housing and the pressing plate of FIG.

  In FIG. 6A, a plan view of the insulating housing 11 to which the pressing plate 13 is fixed is shown together with the FPC 30, and in FIG. 6B, a cross-sectional view taken along line AA in Part A is shown. .

  Ten conductors 32 corresponding to the ten contacts 12 (see FIG. 3) are formed on one surface of the FPC 30, and lock portions 115 are formed on part of both side edges of the end 30 a of the FPC 30. A protrusion 31 is formed to engage the. The FPC 30 is inserted between the FPC receiving surface 114 of the insulating housing 11 and the pressing plate 13 with the tip 30b facing the front surface of the insulating housing 11 to which the pressing plate 13 is fixed.

  The insulating housing 11 is not fixed to the circuit board when the FPC 30 is inserted. At this time, as described with reference to FIG. 3, the flat cable contact 126 provided at the end portion of the second elastic arm 123 is positioned at substantially the same height as the FPC receiving surface 114 and is therefore inserted. Does not interfere with the FPC 30. As described above, the zero insertion force of the FPC 30 can prevent the conductor 32 of the FPC 30 from being removed.

  FIG. 7 is an external view showing a fixture constituting the FPC connector of FIG. FIG. 8 is an external view showing a circuit board on which the fixture of FIG. 7 is arranged.

  Each of the part (a) to part (c) in FIG. 7 corresponds to the orientation of the FPC connector shown in FIG. 1, and part (a) is a plane of the fixture 14 in a state of being arranged on the circuit board. The figure, part (b) shows a rear view, and part (c) shows a left side view.

  The fixture 14 is formed by punching and bending a metal plate, and a fixing claw 141 for locking the fixing piece 132 of the pressing plate 13 (see FIG. 4) is formed. The fixture 14 is soldered to the circuit board 20. The fixture 14 is soldered together with other components of the fixture 14 arranged on the circuit board 20 by a solder reflow process or the like. Thus, a separate process for connecting the fixture 14 is not necessary.

  Here, as shown in FIG. 8, on the circuit board 20, two ground patterns 22 made of a conductive metal and ten pads 21 are formed. The ground patterns 22 are arranged at intervals corresponding to the width of the pressing plate 13 (see FIG. 6), and the pads 21 are circuit board contacts 125 of the contacts 12 arranged in the insulating housing 11 (see FIG. b) are arranged in a staggered arrangement in two rows corresponding to the positions in (b).

  Returning to FIG. 7 and continuing the description, the two fixing tools 14 are fixed to the two ground patterns 22 on the circuit board 20 with the fixing pieces 132 formed at two locations on the pressing plate 13 (see FIG. 4). The potential of the fixture 14 is at the ground level. Here, as a means for fixing the pressing plate 13 (see FIG. 4) to the circuit board 20, one type of fixing is adopted by adopting two fixing tools 14 instead of one integrally configured fixing tool. By arranging only two tools 14 according to the connector width, it is possible to deal with other types of pressing plates and insulating housings having different widths.

  9 and 10 are views for explaining how the insulating housing and the pressing plate of FIG. 6 are fixed to the circuit board on which the fixing device of FIG. 7 is arranged.

  9 shows a rear view of the insulating housing 11 and the pressing plate 13 into which the FPC 30 is inserted together with the circuit board 20, and part (b) shows a left side view. Further, FIG. 10 (a) shows a cross-sectional view taken along the line AA in FIG. 9 (a). In FIG. 10 (b), the insulating housing 11 and the pressing plate 13 are fixed. A cross-sectional view in a state of being fixed to the tool 14 is shown.

  First, with reference to part (a) of FIG. 10, the end 30 a of the FPC 30 inserted between the FPC receiving surface 114 of the insulating housing 11 and the pressing plate 13 has a tip 30 b having a first step surface. It abuts on 114a, is positioned in the insertion direction by the first step surface 114a, and is positioned in the width direction by the second step surface 114b (see FIG. 3). In this way, the pressing plate 13 and the insulating housing 11 cooperate to receive the end 30 a of the FPC 30 between the pressing plate 13 and the insulating housing 11. Here, the protrusion 31 (see FIG. 6) of the FPC 30 engages with the lock portion 115 (see FIG. 6) of the insulating housing 11, and the FPC 30 is prevented from coming off. However, it is possible to prevent the FPC 30 from being removed without using the lock portion 115. For example, the pressing plate 13 and the receiving surface 114 of the insulating housing 11 are configured to sandwich the end portion 30a of the FPC 30. This is also possible.

  Next, as shown in part (a) of FIG. 9 and FIG. 10, when the insulating housing 11 is fixed to the circuit board 20, the insulating housing 11 and the pressing plate 13 that receive the FPC 30 are The bottom surface 112 is inserted between the two fixtures 14 arranged on the circuit board 20 in a posture facing the circuit board 20. At a position where the bottom surface 112 of the insulating housing 11 reaches the circuit board 20, the fixing piece 132 of the pressing plate 13 is engaged with the fixing claw 141 of the fixing tool 14 (see FIG. 1). As a result, the fixing tool 14 fixes the insulating housing 11 and the pressing plate 13 to the circuit board 20. In this way, the FPC connector 10 shown in FIG. 1 is completed.

  Here, as shown in part (b) of FIG. 10, when the insulating housing 11 and the pressing plate 13 are fixed to the circuit board 20, the circuit board contacts 125 that have been projected below the bottom surface 112 until then are formed. Then, it is pushed into the insulating housing 11 by the pads 21 of the circuit board 20. Accordingly, the contact 12 swings in the direction indicated by the arrow R in the figure with the pivot 111 as the swing axis. However, since the flat cable contact 126 is held in contact with the conductor 32 on the FPC 30, the contact 12 is prevented from swinging. As a result, the first elastic arm 122 and the second elastic arm 123 of the contact 12 are bent between the pad 21 of the circuit board 20 and the conductor 32 on the FPC 30. When the insulating housing 11 and the pressing plate 13 are fixed to the circuit board 20, the circuit board contact 125 is pressed against the pad 21, and the reaction force F causes the flat cable contact 126 to contact the conductor of the flat cable.

  At this time, paying attention to the shape of the contact 12, the position of the circuit board contact 125 provided at the end of the first elastic arm 122 is changed from the position in a state where the first elastic arm 122 is not bent to the locus P1. The flat cable contact 126 provided at the end of the second elastic arm 123 is displaced along the locus P2 in the direction opposite to the circuit board contact 125.

  Here, since the contact 12 has a bifurcated shape, each of the first elastic arm 122 and the second elastic arm 123 bends over a long portion from the bifurcated branch point to the end. For this reason, for example, the circuit board contact 125 and the flat cable contact 126 that are displaced in different directions compared to the case where the length of the first elastic arm is zero and the elastic arm is formed like a single rod. The amount of elastic displacement increases.

  In addition, the second elastic arm 123 is longer than the first elastic arm 122, and the flat cable contact 126 is farther from the pivot 111 as the swing shaft on which the contact 12 is held than the circuit board contact 125. Arranged at a distance. For this reason, when the insulating housing 11 is fixed to the circuit board 20, the displacement amount of the flat cable contact 126 due to the swing of the contact 12 is larger than the displacement amount of the circuit board contact 125. Therefore, even if the thickness of the FPC 30 received in the insulating housing 11 is different for each product, the flat cable contact 126 sufficiently absorbs the difference in thickness for each product, so Touch.

  Further, the circuit board contact 125 and the flat cable contact 126 are arranged at different positions in the direction D in which the first elastic arm 122 and the second elastic arm 123 extend. Therefore, when the circuit board contact 125 is pressed against the pad 21, the locus P <b> 1 that is displaced by the bending of the first elastic arm 122 and the flat cable contact 126 is pushed back to the FPC 30. Further, the locus P2 displaced by the bending of the second elastic arm 123 does not overlap. If the circuit board contact and the flat cable contact are arranged at the same position in the direction D, the trajectories may overlap. For this reason, in order to ensure elastic displacement while preventing contact between the elastic arms, the locus of the circuit board contact and the locus of the flat cable contact are added to the space between the circuit board and the FPC. Height is required.

  According to the FPC connector 10 of the present embodiment, as described above, the locus P1 of displacement of the circuit board contact 125 and the locus P2 of displacement of the flat cable contact 126 do not overlap. In between, the locus P1 of the circuit board contact 125 and the locus P2 of the flat cable contact 126 are arranged in parallel in the direction D. Therefore, the FPC connector 10 is reduced in height.

  Further, according to the FPC connector 10 of the present embodiment, the contact 12 contacts the pad 21 when the insulating housing 11 is fixed to the circuit board 20, so that the contact 12 does not need to be soldered to the pad 21. Therefore, it is not necessary to take measures against solder rise due to soldering, and the mounting work of the FPC connector 10 is simplified.

  Moreover, according to the FPC connector 10 of this embodiment, since the pressing plate 13 and the fixture 14 are both made of a metal material, the end portion of the flat cable is electromagnetically shielded by the pressing plate. When the FPC has a ground layer, the shielding effect is higher.

  11 is a diagram for explaining a state in which another type of FPC different from that in FIG. 6 is inserted into the insulating housing and the pressing plate in FIG. 5, and FIG. 12 shows the insulating housing and the pressing that have received the FPC in FIG. It is sectional drawing which shows the state by which the board was fixed to the circuit board.

  A plan view of the insulating housing 11 to which the pressing plate 13 is fixed is shown in part (a) of FIG. 11, and an AA sectional view in part (a) is shown together with the FPC 50 in part (b).

  The FPC 50 in FIG. 11 has ten conductors 52 formed as in the FPC 30 in FIG. In addition, the FPC 50 has a ground layer 53 made of a metal material on the side surface opposite to the surface on which the conductor 52 is formed. The FPC 50 is inserted and received between the insulating housing 11 and the pressing plate 13. As shown in FIG. 12, in a state where the insulating housing 11 and the pressing plate 13 that have received the FPC 50 are fixed to the circuit board 20, the pressing plate 13 is electrically coupled to the ground layer 53 of the FPC 50, and the fixture 14. Via (see FIG. 7), it is also electrically coupled to the ground pattern 22 (see FIG. 7) on the substrate. Therefore, the end portion 50a of the FPC 50 is strongly electromagnetically shielded by the pressing plate 13, and the influence of unnecessary radiation and external noise is reduced.

  In the above-described embodiment, the pressing plate 13 and the fixing tool 14 are described as both made of a metal material. However, the present invention is not limited to this, and either or both of the pressing plate and the fixing tool are used. You may consist of materials other than a metal. However, since the pressing plate 13 and the fixture 14 are both made of a metal material, the end portion of the flat cable is electromagnetically shielded by the pressing plate as described above.

  Moreover, although the FPC connector 10 of the present embodiment has been described as being intended for an FPC, the flat cable electrical connector of the present invention is not limited to being intended for an FPC, and is a flat member having flexibility. And what is necessary is just to have a conductor, for example, a flexible flat board | substrate, FCC (flexible flat cable), etc. may be sufficient.

  In the FPC connector 10 of the present embodiment, the contact 12 has been described as having a bifurcated elastic arm 124 including a first elastic arm 122 and a second elastic arm 123. The electrical connector for use is not limited to this. For example, in consideration of the balance between the space and the amount of elastic displacement, the length of the lower arm can be shortened, or the contact can be shaped like a single bar with a length of zero. However, since the contact has a bifurcated shape, the amount of elastic displacement of the two contact points displaced in different directions increases.

It is an external view of the FPC connector which is one Embodiment of this invention. It is AA sectional drawing of FIG. It is a figure which shows the insulation housing and contact which comprise the FPC connector of FIG. It is an external view which shows the press board which comprises the FPC connector of FIG. It is an external view which shows the insulation housing and press plate which comprise the FPC connector of FIG. It is a figure explaining a mode that FPC is inserted in the insulation housing and press board of FIG. It is an external view which shows the fixing tool which comprises the FPC connector of FIG. It is an external view which shows the circuit board by which the fixing tool of FIG. 7 is arrange | positioned. It is a figure explaining a mode that the insulation housing and press board of FIG. 6 are fixed to the circuit board by which the fixing tool of FIG. 7 is arrange | positioned. It is a figure explaining a mode that the insulation housing and press board of FIG. 6 are fixed to the circuit board by which the fixing tool of FIG. 7 is arrange | positioned. It is a figure explaining a mode that FPC of a kind different from FIG. 6 is inserted in the insulation housing and press plate of FIG. It is a figure which shows the state by which the insulating housing and press plate which received FPC of FIG. 11 were fixed to the circuit board.

Explanation of symbols

10 FPC connector (Electric connector for flat cable)
DESCRIPTION OF SYMBOLS 11 Insulation housing 12 Contact 122 1st elastic arm 123 2nd elastic arm 124 Elastic arm 125 Contact for circuit boards 126 Contact for flat cables 13 Pressing plate 14 Fixing tool 20 Circuit board 21 Pad 30, 50 FPC (flat cable)
30a, 50a End 30b Tip 32, 52 Conductor F Reaction force

Claims (3)

An electrical connector for a flat cable, which is attached to the surface of a circuit board provided with a pad and electrically connects the conductor of the flat cable and the pad,
A contact having an elastic arm that contacts the pad of the circuit board and the conductor of the flat cable;
An insulating housing for holding the contact in a swingable manner and positioning an end of the flat cable by guiding an end of the flat cable;
A pressing plate fixed to the insulating housing and receiving the end of the flat cable between the insulating housing in cooperation with the insulating housing;
The insulating housing is fixed to the circuit board in a state of receiving the end of the flat cable between the pressing plate and
The elastic arm is
Circuit board contacts pressed against the pads on the surface of the circuit board;
The circuit board contact is in contact with the conductor of the flat cable by a reaction force pressed against the pad, and the circuit board contact is disposed at a different position in the direction in which the elastic arm extends. An electrical connector for a flat cable, characterized by comprising:   The contact includes a first elastic arm provided with an end of the circuit board contact at the end, and a flat cable contact provided at the end that is longer than the first elastic arm. 2. The flat cable electrical connector according to claim 1, which has a bifurcated shape comprising two elastic arms. The flat cable electrical connector is disposed on the circuit board, and includes a fixture for fixing the insulating housing to the circuit board by fixing the pressing plate.
The flat cable electrical connector according to claim 1, wherein the pressing plate and the fixture are both made of a metal material.

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