JPS6313657Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to electrical connectors.

A so-called pressure-contact type electrical connector that connects a flat cable consisting of two or more parallel conductors covered and bonded with an insulating material to an electrical terminal generally equipped with a V-shaped or U-shaped wire receiving groove. is publicly known. FIG. 1 shows an example of this type of electrical connector. This connector has a conductor connection part 8 consisting of a pair of arms 7 having a contact part (not shown) for connecting with an external terminal at one end and a sharp tip for penetrating the insulating material of the flat cable at the other end. A first housing 1 in which a terminal 6 is disposed within an insulating base 2 having a plurality of terminal receiving holes 5 such that its conductor connection portion 8 protrudes above the insulating base.
and a plurality of arms 7 for receiving a pair of arms 7 of the conductor connection part that protrude through the insulating material when the conductor connection part 8 is penetrated through the insulating material 12 of the flat cable F and the conductor 11 is connected to the conductor connection part 8. The second housing 21 has a hole (not shown). Furthermore, when an axial force is applied to the flat cable connected to the terminal 6, this connector clamps and fixes the flat cable between the second housing 21 and the second housing 21 in order to alleviate strain on the connection between the cable and the terminal. It has a cable fixture 31 for fixing the cable.

By the way, in such a known electrical connector, as shown in the figure, the second housing 21 has a pair of parallel legs 22 extending downward from both ends of the second housing 21 in the longitudinal direction, and cable fixing devices extend from both ends thereof. It has a pair of legs 32 that open slightly outward and extend downward, and the legs 22 and 32 fix the second housing 21 to the first housing 1 and the cable fixture 31 to the second housing 21, respectively. It's becoming like that. That is, the legs 22 of the second housing 21 pass through the openings 3 formed at both longitudinal ends of the first housing 1, and the portions 23 of the legs 22 pass through the locking protrusions 4 formed at both ends of the first housing.
The legs 32 of the cable fixture 31 pass through openings 24 formed at both ends of the second housing 21, and the shoulders 33 of the legs 32 resiliently engage with the bottom surface of the second housing.

One problem with such known electrical connectors is that both the second housing and the cable fixture have long fixation legs as described above, which tend to break during molding, reducing the yield of good products. This means that they are susceptible to similar damage during transportation, product inspection, assembly work, and other handling. Furthermore, the presence of these legs complicates the structure of the mold and increases the manufacturing cost of the mold.

The present invention has been devised in view of the above-mentioned problems, and the second housing and the cable fixing device do not have legs as described above, and a locking device that ensures easy attachment and secure fixation to the first housing is provided. The purpose of the present invention is to provide an electrical connector with the following features.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The electrical connector of the present invention shown in FIG. 2 comprises a first housing 40, each molded from an electrically insulating plastic material, and a second housing 70 and a cable fixture 80 which are superimposed on the first housing. The first housing 40 is
A substantially rectangular insulating base 41 having a plurality of terminal receiving holes 42 arranged in two parallel rows, and a pair of side frames integrally formed with the insulating base at both longitudinal ends of the insulating base 41. 43.

Each terminal receiving hole 42 of the insulating base 41 has a stopper part 62 (FIGS. 5 and 6) formed by punching out a metal sheet at one end, and a conductor connecting part 61 at the other end.
The plug receptacle portion of the electrical terminal 60 having a diameter is received, and the conductor connecting portion 61 projects upward from one side of the insulating base 41.

The conductor connection portion 61 of each terminal 60 consists of a pair of arms 63 defining a conductor receiving slot between the pair of arms. Each arm is an insulator 10 of a flat cable 100.
It has a sharp tip that can be pierced through it, and a locking protrusion 64 that projects outward.

Each of the pair of side frames 43 extending perpendicularly to the insulating base 41 includes a pair of outer plates 44, and the pair of outer plates 44 are interconnected by connecting walls 45 and 47. The upper portion of the outer plate 44 located above the one side surface of the insulating base 41 and the connecting wall 47 form a pair of guides that receive and guide respective longitudinal end surfaces of a second housing 70 and a cable fixture 80, which will be described later. make up the wall.
The connecting walls 45 each connect to the end wall 4 of the insulating base 41.
8 (FIG. 3) and extends upwardly from the lower end of the outer plate 44, terminating at approximately two-thirds the height of the outer plate. In addition, each pair of outer plates 4
An elastic locking arm 46 extends upward from the base of the connecting wall 45 between the connecting walls 45, respectively. This elastic locking arm 46
is provided with a locking protrusion 49, and as shown in FIG.
The electrical connector of the present invention is engaged with the locking portion 69 of the connector to fix the electrical connector of the present invention to the mating connector. The connecting walls 47 constituting the pair of guide walls each include an elastic wall 50 whose lower end is free and separated by two vertical grooves. Each elastic wall 50 has a space 6 formed between the connecting wall 45 and the end wall 48 of the insulating base 41.
7, and its free end terminates near the upper end of the connecting wall 45. The opposing surface of each elastic wall 50 is perpendicular to the upper surface of the insulating base 41, and the lower end of the opposing surface, that is, the free end, is connected to the first locking piece 51 consisting of two protrusions and the vicinity of the elastic wall base above the first locking piece 51. A second locking piece 52 consisting of one protrusion is formed.

The two protrusions 51 constituting the first locking piece are an upwardly inclined shoulder portion 51a and a downwardly directed horizontal shoulder portion 5, respectively.
Contains 1b. Each protrusion 51 has an elastic wall 5 in its lower half.
protrudes downward from the free end of the elastic wall 50 and comes into contact with the upper end of the connecting wall 45 when the elastic wall 50 is excessively deflected in the direction of the elastic locking arm 46 .

One protrusion 52 constituting the second locking piece is the protrusion 5
It includes an upward sloping shoulder 52a and a downward horizontal shoulder 52b similar to 1. The protrusion 52 has a width that fits between the two protrusions 51 of the first locking part, and is arranged at the base of the elastic wall above the two protrusions.

The substantially rectangular second housing 70 has a plurality of holes 71 extending inwardly from one side thereof, and has a fifth hole 71 extending inwardly from one side thereof.
As shown in the figure, when the second housing 70 is stacked on the first housing 40 with the flat cable 100 sandwiched between them, the conductor connection portion 61 of the terminal 60 protrudes through the insulating material 102 of the flat cable 100. A pair of arms 63 are received. Each hole 71
includes a hole entrance formed to be slightly larger than the width of the pair of arms 63, a tapered portion gradually formed in the width from there, and a hole deep portion formed to be smaller than the width of the pair of arms 63, and the pair of arms 63 to be received. When the arms enter the deep part of the hole from the tapered part, they are pressed against each other and approach each other, so that the locking protrusions 64 of each arm are locked to the wall of the deep part of the hole.

The second housing 70 also has two ridges 72 extending in parallel and spaced apart from each other in the longitudinal direction on its upper surface (in FIG. 2), and has end surfaces projecting approximately in an H-shape at both ends in the longitudinal direction, i.e., at both ends. It includes a pair of vertical portions 73 located at , and a horizontal portion 74 interconnecting both vertical portions 73 .

Each pair of vertical portions 73 is formed with an outer dimension W that fits into the guide wall of the first housing 40;
This allows the second housing 70 to be accurately guided onto the first housing 40.

Each horizontal portion 74 is arranged such that the second housing 70
a horizontal shoulder 7 that engages a first protrusion 51 on the elastic wall 50 when superimposed on the housing 40;
4a and a downwardly inclined portion 74b, and has a notch 75 formed in the center thereof with a space having a width that allows the passage of the second protrusion 52 on the elastic wall 50.

The cable fixture 80 has a substantially rectangular shape and has a sixth
As shown in the figure, the cross section in the longitudinal direction is formed in the shape of an inverted mountain, and there is a middle wall 82 at the center of the lower surface that projects downward from both side walls 81.

The cable fixture 80 also has H at both longitudinal ends.
The mold has a projecting end wall and a pair of vertical portions 8 thereof.
3 is fitted into the guide wall of the first housing. The horizontal portion 84 connecting the vertical portion 83 engages the second protrusion 5 on the resilient wall 50 when engaged with the first housing.
2 and a horizontal shoulder 84a that engages with the downwardly inclined portion 8
It has 4b. The length of the horizontal portion 84, that is, the distance between the pair of vertical portions 83 is formed to have a width W that accommodates the second protrusion.

In the present invention having the above configuration, the electrical connector is assembled as follows.

First, the flat cable 100 is inserted into the first housing 40.
The terminal 60 is placed on the conductor connection portion 61 of the terminal 60 protruding from the insulating base 41 of the flat cable 100 and pressed toward the conductor connection portion by a known method. As a result, the conductor 101 of the flat cable 100 is inserted into the conductor receiving slot 61.
The arms 63 are press-fitted into the insulating material and protrude upward.

Next, the second housing 70 is attached to the first housing 40.
It is introduced along a pair of opposing guide walls, and the horizontal shoulder 74a of the H-shaped end surface engages the first locking piece 5 of the elastic wall 50.
1 until it engages with the horizontal shoulder 51b. At this time, the horizontal portion 74 of the H-shaped end wall has a notch 75.
Due to the presence of the elastic wall 50, the second locking piece 52 of the elastic wall 50 passes smoothly without being subjected to resistance, and the horizontal portion 74
The inclined portion 74b is the inclined shoulder portion 51 of the first locking piece 51.
a, the elastic wall 50 is elastically deflected outward, that is, in the direction of the elastic locking arm 46, and when the horizontal portion 74 gets over the first locking piece 51, it returns to its original position and locks into the first locking arm. The horizontal shoulder 51b of the stopper piece 51 engages with the horizontal shoulder 74a of the H-shaped end surface.

Also, at this time, the insulating material 102 of the flat cable
A pair of arms 63 of each terminal 60 projecting through the
are received within each hole 71 of the second housing as described above.

Once the second housing 70 is installed, the flat cable 100 is folded back onto the second housing and a cable fixture 80 is installed to secure the cable 100, as shown in FIGS. In the same way as the second housing 70 is attached, it is guided by the guide wall and attached to the first housing. That is, the horizontal portion 84 of the H-shaped end wall bends the elastic wall 50 slightly outward while the second locking piece 5
2 and then the horizontal shoulder 84 of the horizontal portion 84
a engages with the horizontal shoulder portion 52b of the second locking piece 52. As a result, the flat cable 100 is firmly held between the two rows of peaks 72 on the second housing and the chevron-shaped lower surface of the cable fixture.

As described above, the present invention provides a first housing with a pair of elastic walls 50 having locking pieces for fixing the second housing and cable fixing device. Not only can the structure be simplified by removing the legs for mounting and fixing provided on each of the elastic walls, but also the second housing and the cable fixing device can be attached to the first and second legs provided on the elastic wall.
It has the effect that it can be easily and reliably attached to the locking piece of the locking piece by snap engagement.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a conventional electrical connector, FIG. 2 is an exploded perspective view of the electrical connector of the present invention,
Figure 3 is a sectional view taken along the - line in Figure 2;
Figure 4 is a sectional view taken along the - line in Figure 3;
FIG. 5 is an enlarged sectional view showing the main parts of the electrical connector of the present invention, and FIG. 6 is a sectional view taken along the - line in FIG. 40...first housing, 41...insulating base,
42...Terminal accommodation hole, 43...Side frame, 44...Outside plate, 50...Elastic wall, 51...First locking piece, 5
2... Second locking piece, 60... Terminal, 61... Conductor connection portion, 63... Pair of arms, 70... Second housing, 74a... First shoulder, 80... Cable fixture, 84a...Second shoulder.

Claims (1)

[Scope of utility model registration request] An electrical connector for connecting a flat cable formed by covering and bonding a plurality of parallel conductors with an insulating material, the electrical connector comprising a first housing, a second housing and a cable fixing device that are sequentially stacked on the first housing. an insulating base whose first housing has a substantially rectangular shape, and a pair of guide walls extending upwardly from one side of the insulating base at right angles to one side of the insulating base at both longitudinal ends of the insulating base. The insulating base has a plurality of electrical terminals, each of which has a conductor connection portion projecting upward from the one side of the insulating base, and the conductor connection portion is connected to the insulation of the flat cable. A pair of arms each having a pointed tip that can pierce a material is provided, and when the coated conductor portion of the flat cable is pressed between the arms, each of the conductors of the flat cable pierces the pair of arms. the second housing has a substantially rectangular shape, and the second housing has a substantially rectangular shape; has a plurality of holes extending inwardly from one side of the second housing, the one side of the first housing and the one side of the second housing having an end surface guided along the guide wall of the second housing. When the parallel cables are sandwiched between the parallel cables and the parallel cables are overlapped, the holes of the second housing receive the pairs of arms protruding through the flat cables, and the cables The fixture has a substantially rectangular shape and has an end face guided along the guide wall of the first housing at its longitudinal end, and clamps and fixes the flat cable between one side face of the fixture and the second housing. In the electrical connector, the first housing includes elastic walls on the pair of guide walls, each elastic wall having a fixed upper end and a free lower end. a first locking piece that can be engaged with a first shoulder provided on each end surface of the second housing, and a second locking piece formed on each front end surface of the cable fixture near each fixed end; a second locking piece that engages with the shoulder of the flat cable, and the second housing and the cable fixture each sandwich the flat cable and are superimposed on the first housing so that the first and second shoulders When the elastic walls abut against the first and second locking pieces of the pair of elastic walls, the elastic walls bend outward to allow passage of the first and second shoulders, and the first and second shoulder sections respectively bend outward. When the second shoulder passes through the first and second locking pieces, the elastic wall returns to its original position and the first shoulder, first locking piece, and second locking piece move together. An electrical connector characterized in that a shoulder portion and a second locking piece are engaged with each other, thereby fixing the second housing and the cable fixture to the first housing.