JP3887697B2 - Flat cable connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector used by connecting a plurality of shielded electric wires to a flat cable end in parallel.
[0002]
[Prior art]
As this type of connector, one described in Japanese Patent Laid-Open No. 2001-307822 is known. FIG. 11 shows an enlarged part of this connector. The flat cable 100 connected to this connector is formed in a strip shape by covering a plurality of shielded electric wires 101 in parallel with a film, and at the terminal, the shield layer 102 of each shielded electric wire 101 is connected to a pair of conductive wires. The short-circuit body 103 is fixed by being sandwiched between plates and soldered, and the core wire (not shown) of each shielded electric wire 101 is exposed beyond that. The connector housing 104 holds the short-circuit body 103, and the core wires of the shielded electric wires 101 are individually connected to terminal fittings (not shown) held in the housing 104. Further, the periphery of the housing 104 is covered with a shield shell 105, and this shield shell 105 is connected to the shield layer 102 of each shielded electric wire 101 via the short-circuit body 103, thereby removing radiation noise and the like. Shielding effect can be obtained.
[0003]
[Problems to be solved by the invention]
By the way, in this type of connector, when the flat cable extending from the rear end of the housing is bent in the thickness direction, if a load is applied to the fixed portion of the short-circuit body in the flat cable, the shielded electric wire is cut therefrom. There is a risk that. Thus, in the above connector, the flat cable 100 is bent in the thickness direction (vertical direction) by sandwiching the shielded electric wire 101 between the upper wall portion 105A of the shield shell 105 and the rear wall portion 104A of the housing 104. At this time, a load is not applied to the fixed portion (indicated by symbol S) of the short-circuit body 103.
However, in actuality, in the connector described above, the flat cable 100 is bent because there is a clearance between the housing 104 and the shield shell 105 and the flat cable 100 and the covering portion of the shielded electric wire 101 is bent. In such a case, there is a possibility that the fixed portion S of the short circuit body 103 is loaded and cut from there. Therefore, in order to prevent the flat cable 100 from being cut more reliably, it is desirable to hold the flat cable 100 at a position as far back as possible (left side in the drawing) away from the short-circuit body 103.
[0004]
In order to set the position for holding the flat cable 100 further rearward without changing the size of the connector, for example, as shown in FIG. 12A, the rear wall 104A of the housing 104 is connected to the rear end of the shield shell 105. A method is conceivable in which an extending portion 106 extending toward the gap above the rising portion 105B is provided, and the flat cable 100 is sandwiched between the extending portion 106 and the upper wall portion 105A of the shield shell 105. . However, in such a connector, since the thickness of the housing 104 and the shield shell 105 is considerably small due to a demand for miniaturization, the thickness of the extending portion 106 is extremely small and the strength is insufficient.
As another method, as shown in FIG. 12 (B), the rising portion 105B at the rear end of the shield shell 105 is eliminated, and the length of the rear wall 104A of the housing 104 is changed without changing the thickness. It is also possible to extend to the end position. However, in this case, the strength in the thickness direction of the shield shell 105 becomes insufficient due to the absence of the rising portion 105B bent at a right angle.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a connector that can more reliably prevent the flat cable from being cut without incurring insufficient strength of the housing or the shell. .
[0005]
[Means for Solving the Problems]
A flat cable connector according to the invention of claim 1 for solving the above-mentioned problem is a connector used by connecting a plurality of shielded electric wires to a flat cable end in parallel, In the one provided with a shield shell that can be connected to the shield layer of each shielded electric wire so as to cover the housing while the core wires of the respective shielded electric wires are held in parallel in the width direction,
The shield shell includes a base side shell and a lid side shell that can be bent in a substantially parallel posture with respect to the base side shell, and the flat cable is led to the rear end of the shield shell at which the flat cable is led out. A pair of wire pressing portions sandwiching from the thickness direction, a lock plate disposed in the middle portion in the width direction at the rear end of the shield shell and having a locking groove and formed between the shielded wires, It is characterized in that a hook that can be locked in the locking groove when the lid-side shell is bent in a substantially parallel posture with respect to the base-side shell is provided .
[0006]
According to a second aspect of the present invention, in the first aspect of the present invention, the shield shell is provided with a rising edge portion that is formed to rise substantially perpendicular to the thickness direction at the rear end position of the housing, and the rising edge thereof. It is characterized in that at least one of the pair of wire pressing portions is formed by bending and extending the tip of the portion rearward substantially at a right angle.
[0007]
Operation and effect of the invention
According to the first aspect of the present invention, when the flat cable is bent in the thickness direction, the portion of the flat cable held by the housing when the flat cable is sandwiched by the pair of wire pressing portions provided in the shield shell. For example, it is possible to prevent a load from being applied to the fixed portion of the short-circuit body. Accordingly, the flat cable can be held at a position behind the conventional one without causing insufficient strength of the housing and the shield shell, and the flat cable can be more reliably prevented from being cut.
[0008]
According to the invention of claim 2, since the shield shell includes the rising edge portion that is formed to rise at a right angle in the thickness direction and the wire pressing portion that is bent and extended at a right end, the strength is increased. It is done.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
Next, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the connector of this embodiment is roughly composed of a housing 20 to which the end of the flat cable 10 is attached and a shield shell 40 attached to the housing 20. This connector can be fitted with a mating connector (not shown) fixed to a circuit board (not shown), and the terminal fitting provided on the mating connector can be attached by setting the connector to the mating state. The flat cable 10 is connected to a circuit on the circuit board.
[0010]
As shown in FIG. 4, the flat cable 10 has a plurality of shielded wires 11 arranged in parallel at predetermined intervals, covered with a film 17, and formed in a strip shape. In the end of the flat cable 10, the short-circuit body 18 is fixed across the shield layer 14 of each shielded electric wire 11. The short-circuit body 18 has a configuration in which the shield layer 14 of each shielded electric wire 11 is sandwiched between a pair of conductive plates and the conductive plates are joined by solder. The core wire 12 is exposed and protrudes from the tip of the short-circuit body 18 and is connected by the alignment sheet 19 so that the core wires 12 are also held in parallel with a predetermined interval.
[0011]
The same number of terminal fittings 21 that can be connected to the core wires 12 of the shielded electric wires 11 as described above are attached to the housing 20. The terminal fitting 21 is a pressure contact type, and as shown in FIG. 2, the terminal fitting 21 is formed in an elongated shape as a whole, and the tip end side is bent and formed to be a contact portion 22. On the other hand, on the rear end side, the press contact portion 23 is formed by being bent at right angles upward while being bifurcated, and the longitudinal groove of the press contact portion 23 becomes the press contact groove 24 that presses the core wire 12 of the shielded electric wire 11. ing.
[0012]
The housing 20 is formed in a horizontally long thick plate shape by a synthetic resin material. A mounting region 26 of the terminal fitting 21 is set at a portion slightly more than 2/3 on the front side (right side in FIG. 2) of the housing 20. In this mounting region 26, a stepped shape that is one step higher on the front end side. A plurality of terminal insertion grooves 27 into which the terminal fittings 21 can be inserted are formed at intervals in the lateral width direction. Further, a partition wall 29 that partitions between the terminal insertion grooves 27 is erected in the vicinity of the stepped portion. Therefore, as shown in FIG. 2, each terminal metal fitting 21 is fitted in the terminal insertion groove 27 while placing the contact portion 22 at the tip on a portion that is one step higher. In addition, in the state which fitted the housing 20 with the other party connector (not shown), the terminal metal fitting provided in the other party connector contacts the contact part 22. FIG.
[0013]
Further, immediately after the mounting region 26 in the housing 20, a guide portion 30 for appropriately partitioning the inner covering 13 in the shielded wire 11 of the flat cable 10 is provided on the rear end side of the housing 20. Guide portions 31 for appropriately partitioning the covering 15 are formed. Further, a mounting portion 32 having a horizontally long recess shape as a whole is formed between the guide portion 30 and the guide portion 31, and the short-circuit body 18 of the flat cable 10 is slightly spaced from the rear end of the housing 20. It can be placed while positioning.
[0014]
The housing 20 is provided with a cover 35 so as to cover the upper surface thereof, specifically, the upper surface of a region extending from a position slightly behind the arrangement position of the front partition walls 29 to the arrangement position of the guide portions 31 on the rear edge. . The cover 35 is formed of a synthetic resin material as a separate body from the housing 20, but is integrally assembled at one end in the lateral width direction of the housing 20 through a hinge 36 so as to be swingable.
As shown in FIG. 6, when the cover 35 is closed and put on the back surface of the cover 35, a pair of pressing portions 37 that enter the front and rear sides of the press contact portion 23 in the terminal fitting 21 are provided in the terminal insertion grooves 27. Are formed for each corresponding position.
[0015]
In the shield shell 40, a base side shell 41 and a lid side shell 42 are integrally formed by pressing one conductive metal plate such as phosphor bronze. Specifically, as shown in FIGS. 2 and 3, the base-side shell 41 is formed in a shape that can be applied to almost the entire lower surface of the housing 20, and has a front edge (back side in FIG. 3) in the flat main body 44. ), A high-order portion 45 is formed in a stepped shape so as to hit the lower surface of the housing 20 which is one step higher, except for both ends in the width direction.
[0016]
From both ends of the front edge of the main body 44 of the base side shell 41, a connecting piece 47 having a predetermined width is formed to rise vertically, and a lid side shell 42 is integrally formed at the upper ends of both connecting pieces 47. Therefore, at the time of molding, the base side shell 41 and the lid side shell 42 are orthogonal to each other. Further, the connecting piece 47 can be bent from an intermediate position.
[0017]
A substantially gate-shaped insertion piece 48 is cut and raised at a position near the left and right side edges on the rear edge side (front side in FIG. 1) of the base side shell 41. On the other hand, an insertion groove (not shown) penetrating vertically is formed in the side end position of the mounting portion 32 in the housing 20, and the insertion piece 48 of the base side shell 41 is tightly inserted therein. The base side shell 41 and the housing 20 are locked. Further, an insertion piece 49 is formed by cutting and raising at a position near the left and right side edges on the swing end side of the lid side shell 42. On the other hand, the housing 20 is provided with an insertion groove 33 on the upper surface of the outer portion in the lateral width direction from the mounting portion 32, and in a state where the lid-side shell 42 is bent in a substantially parallel posture with the base-side shell 41. By inserting the insertion piece 49 of the lid-side shell 42 into the insertion groove 33 tightly, the lid-side shell 42 and the housing 20 are locked.
[0018]
Further, on the rear edge side of the base portion side shell 41, four contact pieces 55 shown in the figure that elastically contact the lower surface of the short-circuit body 18 in the flat cable 10 described above are cut and raised. On the other hand, in the housing 20, a window hole 34 through which the contact piece 55 passes is formed in the bottom surface of the mounting portion 32. In addition, four contact pieces 56 shown in the figure that can elastically contact the upper surface of the short-circuit body 18 are cut and raised on the swing end side of the lid-side shell 42. On the other hand, the cover 35 is formed with a corresponding window hole 38 through which the contact piece 56 passes.
[0019]
On the left and right side edges of the base-side shell 41, a locking plate 60 is formed to rise, and a locking piece 61 protruding obliquely downward is formed on the outer surface of each locking plate 60. On the other hand, on the front end sides of the left and right side surfaces of the housing 20, a locking projection 39 is formed so as to protrude. In addition, a locking plate 62 is formed on both left and right edges of the lid-side shell 42. When the locking plate 62 is bent in a substantially parallel posture with the base-side shell 41, a locking piece is formed. A locking hole 63 into which 61 is fitted and a locking hole 64 into which the locking projection 39 is fitted are formed.
As shown in FIG. 5, a finger hook portion 65 is formed in the lateral width direction so as to protrude in the lateral width direction on the rear end side of the left and right side ends of the housing 20. A mounting hole 66 for fitting 60 is formed so as to penetrate vertically.
[0020]
On the rear edge of the base-side shell 41, a rising edge 68 is formed to rise at a right angle over substantially the entire width, and a rising edge 69 is similarly formed on the swinging end of the lid-side shell 42. Both shells 41 and 42 are provided with these rising edges 68 and 69 so that the bending strength is increased in the thickness direction (vertical direction). Both rising edge portions 68 and 69 are located at the rear end of the housing 20 as shown in FIGS. 8 and 9 in a state where the base side shell 41 and the lid side shell 42 are assembled to the housing 20. Ten shielded electric wires 11 are led out to the outside. The tip end portion of the rising edge portion 68 in the base side shell 41 is an electric wire holding portion 68A, and is set so that the electric wire holding portion 68A is substantially in contact with the shielded electric wire 11 in a state after assembly. Has been. Further, the rising edge 69 of the lid-side shell 42 has a wire holding portion 70 formed by bending and extending a portion extending from the tip thereof toward the swing end side (rear) at a right angle. Four are formed near the center of the direction. In the state after the assembly, the wire pressing portion 70 is set so as to be substantially in contact with the shielded wire 11 in a surface contact state. Moreover, both the electric wire holding | maintenance parts 68A and 70 are in the position which mutually opposes, and the shielded electric wire 11 is clamped between both the electric wire holding | maintenance parts 68A and 70 in the assembly | attachment state.
[0021]
Further, the rising edge 68 of the base side shell 41 is formed with rising three locking plates 72 with locking grooves 71 opened at predetermined intervals in the intermediate portion in the width direction, and the lid The rising edge 69 of the side shell 42 is formed with a hook 73 that can be locked in the locking groove 71 when bent in a substantially parallel posture with the base side shell 41.
[0022]
Next, the assembly procedure of this embodiment will be described.
First, the terminal fitting 21 is attached to each terminal insertion groove 27 of the housing 20 in a state where the cover 35 is opened. Next, as shown by the arrow in FIG. 2, the housing 20 is put on the base shell 41 of the shield shell 40 and the insertion piece 48 is placed while being inserted into the corresponding insertion hole ( FIG. 4).
[0023]
From this state, as shown by the arrow in FIG. 4, the end of the flat cable 10 is mounted on the mounting region 26 of the housing 20 from above, and the short circuit body 18 is mounted on the mounting portion 32 in a positioned state. Accordingly, the core wire 12 of each shielded electric wire 11 is press-fitted into the press-contact groove 24 of the press-contact portion 23 of the corresponding terminal fitting 21 (see FIG. 6). Thereby, each shield electric wire 11 and terminal metal fittings 21 are connected.
Next, the cover 35 is swung so as to be turned upside down around the hinge 36 and closed as shown in FIG. Accordingly, as shown in FIG. 6, a pair of front and rear pressing portions 37 provided on the back surface of the cover 35 enter the front and rear sides of the press contact portion 23, and press the front and rear of the press contact portion of the core wire 12 in each shielded wire 11. It is kept in pressure contact state by attaching.
[0024]
Subsequently, the lid-side shell 42 is bent backward from a predetermined position of both the connecting pieces 47 as shown by the arrow line in FIG. When the lid-side shell 42 is bent 90 degrees, the insertion piece 49 is tightly inserted into the insertion groove 33 of the housing 20. Further, as shown in FIGS. 7 to 9, on the rear end side of the housing 20, the hook 73 at the swing end of the lid side shell 42 is elastically engaged with the locking groove 71 of the corresponding lock plate 72 of the base side shell 41. In addition, the locking piece 61 of the corresponding locking plate 60 and the locking protrusion 39 of the housing 20 are respectively inserted into the locking holes 63 and 64 of the locked plate 62 on the side end of the housing 20. By fitting elastically, the lid-side shell 42 is locked in a closed state with the housing 20 sandwiched between the lid-side shell 41 and the base-side shell 41.
[0025]
Thereby, both shells 41 and 42 are held in a closed state. Therefore, when the flat cable 10 is pulled in the thickness direction, the housing 20 and the shield shell 40 are not opened and deformed, so that the flat cable 10 is prevented from being detached from the housing 20 or disconnected. Further, the cover 35 is pressed by the lid-side shell 42, and the core wires 12 of the shielded electric wires 11 are held in the press-contact state as described above. At the same time, the contact pieces 55, 56 of the base side shell 41 and the lid side shell 42 are elastically pressed against the surface of the short-circuit body 18 through the window holes 34, 38 of the housing 20 and the cover 35, thereby making electrical contact. The shielding effect such as removing radiation noise is obtained by the function of the shield shell 40 that is shown and arranged so as to surround the periphery.
Further, at the rear end position of the shield shell 40 from which the flat cable 10 is led out, the electric wire pressing portion 68A of the base side shell 41 is substantially in contact with the shield electric wire 11, and the electric wire pressing portion 70 of the lid side shell 42. Is substantially in contact with the shielded electric wire 11 so that the shielded electric wire 11 is sandwiched between the electric wire holding parts 68A and 70.
[0026]
As described above, according to the present embodiment, since the flat cable 10 is sandwiched between the pair of wire pressing portions 68A and 70 provided in the shield shell 40, the flat cable 10 is flattened when bent in the thickness direction. It is possible to prevent a load from being applied to the portion of the cable 10 held by the housing 20, that is, the fixing portion S of the short-circuit body 18. Thereby, the flat cable 10 can be hold | maintained in the back position rather than the past, without causing the strength shortage of the housing 20 and the shield shell 40, and the cutting | disconnection of the flat cable 10 can be prevented more reliably.
[0027]
Moreover, since the shield shell 40 includes the rising edge portion 69 that is formed to rise at a right angle in the thickness direction and the wire pressing portion 70 that has its tip bent and extended at a right angle, the strength is increased.
[0028]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) As shown in FIG. 10, the end portion of the rising edge portion 75 of the base side shell 41 is bent and extended toward the rear at a right angle so as to face the wire pressing portion 70 of the lid side shell 42. Thus, the electric wire holding part 76 may be formed, and the electric wire holding parts 70 and 76 may be brought into contact with the shielded electric wire 11 from the upper and lower sides so as to sandwich the shielded electric wire 11. According to this structure, since the contact surface with respect to the shielded electric wire 11 of the electric wire holding | suppressing parts 70 and 76 is large, when the flat cable 10 is bent, the shielded electric wire 11 is hard to be damaged.
(2) Regarding the shield shell, the base side shell and the lid side shell may be assembled later as separate objects.
(3) The housing is not provided with terminal fittings, but the core wire of the flat cable is held in an exposed state so that the terminal fittings of the mating connector are in direct conductive contact with the core wire when mated with the mating connector. May be.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a connector according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing an initial assembly operation of a housing and a shield shell. 4] Longitudinal sectional view showing the operation of attaching the flat cable terminal [FIG. 5] Perspective view of the cover closed state [FIG. 6] Longitudinal sectional view showing the closing operation of the lid side shell [FIG. 7] Closing the lid side shell FIG. 8 is a perspective view upon completion of closing of the lid-side shell. FIG. 9 is a longitudinal sectional view thereof. FIG. 10 is a partially enlarged sectional view showing a rear portion of the connector in another embodiment. [FIG. 12] (A) Partial enlarged sectional view showing an example of a modified conventional connector (B) Partial enlarged sectional view showing another example [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Flat cable 11 ... Shield electric wire 12 ... Core wire 14 ... Shield layer 18 ... Short-circuit body 20 ... Housing 21 ... Terminal metal fitting 35 ... Cover 40 ... Shield shell 41 ... Base side shell 42 ... Lid side shells 68, 69, 75 ... Standing up Edge part 68A, 70, 76 ... Electric wire holding part

Claims (2)

A connector used by connecting a plurality of shielded electric wires in parallel to the end of a flat cable, wherein the core wires of the shielded electric wires are held in parallel in the width direction in the housing. In a shield shell that can be connected to the shield layer of each shielded electric wire so as to cover,
The shield shell includes a base side shell and a lid side shell that can be bent in a substantially parallel posture with respect to the base side shell,
At the rear end where the flat cable is led out in this shield shell,
A pair of wire pressing parts for holding the flat cable from the thickness direction;
A lock plate that is arranged in the middle portion in the width direction at the rear end of the shield shell and has a locking groove and is formed to rise between the shield wires;
A flat cable connector , wherein a hook that can be locked in the locking groove when the lid-side shell is bent in a substantially parallel posture with respect to the base-side shell is provided .   The shield shell is provided with a rising edge portion formed to rise substantially perpendicular to the thickness direction at the rear end position of the housing, and the tip of the rising edge portion is bent and extended substantially rearward toward the rear. The flat cable connector according to claim 1, wherein at least one of the pair of electric wire pressing portions is formed.

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