JP2683709B2 - No-insertion force electrical connector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a non-insertion force type electrical connector for connecting an electric conductor to a circuit of a printed circuit board.

(Prior Art) There is a need within the electronics industry to develop means for directly connecting conductors to printed circuit boards. The connecting means must also be designed so that the conductors can be easily attached and detached.

A multi-conductor cable (multi-core cable) and a flexible printed circuit are connected to a printed circuit board, DC power is supplied to the printed circuit board, and data is transmitted / received to / from the circuit of the printed circuit board. As a typical example, U.S. Pat.No. 4,435,035, 4,062,610,
(International patent application number) PCT / US86 / 01942 (Publication number) WO87
/ 01987) and connect the conductor to an electrical female connector as disclosed in US Pat. This connection system is usually good, but
Manufacturing cost is high due to the male header. Therefore, development of an electric connector (in other words, an electric connector capable of directly connecting an electric conductor) that can be mounted on a printed circuit board without using a male header is desired in the electronics industry.

Connectors designed for the above applications have many desirable features. One of these is the mechanical advantage that the contact can be raised from the opposite position to the open position. Also, preload the terminals to ensure the largest possible contact force with the electrical conductor. Another feature is the detent position on the electrical connector that holds the contacts open to the open position for insertion of the flexible cable.
Therefore, the electric cable can be inserted with one hand.

The connector must also be a universal design that allows one basic housing and terminal to be used for various configurations. In addition, a low-profile connector is required due to packaging, and if access is a problem, a vertical connector is required. The connector must also be compatible with each conductor of a multi-conductor flat cable, a printed circuit board, and a flexible printed circuit. Finally, the design must be flexible enough to add an electrical shield.

When using the connector disclosed in EP 0263296, the flexible circuit can be placed in front of the connector and connected to the printed circuit board. In this connector, the upper cover rotates around the housing, and the front nose of the cover lifts the contact to open it. Although this connector meets some industry needs, it also suffers from some drawbacks. First, the cover is located on the top surface of the connector, which increases the vertical dimension of the connector. Second, the cover is a lever, and the cover must be pushed down to lift the contact and insert the flexible cable. Therefore, both hands are required to insert the cable. (Both hands cannot be used depending on the internal space of the electronic device.) Third, there is little mechanical advantage to lift the contact because the vertical downward movement distance is small. Making it difficult to insert. Finally, this connector cannot accommodate various configurations. As an example, this connector cannot be used as a vertical type. Also, additional members such as shields cannot be added because most of the top of the connector must be accessible for the rotating cover.

The electrical connectors disclosed in U.S. Pat. Nos. 4,252,389 and 4,252,392 connect flat cable conductors to traces on a printed circuit board. The connector is provided with a cam that moves the cantilever spring to release the contact with the cable in order to insert the cable without applying insertion force. However, the cantilevered spring does not contact the conductor of the flat flexible cable, but only spring-loaded the conductor of the flat flexible cable into direct contact with the traces of the printed circuit board. In other words, one side of the conductor of the flat flexible cable is open, this side is directly applied to the trace of the printed circuit board and a spring presses the cable against the printed circuit board. However, the spring never makes direct contact with the conductor, but only with the insulator backing the conductor. This system can be used in certain cases, but not on the individual solid conductors of multiconductor cables.

(Constitution of the Invention) The above-mentioned objects can be achieved by designing an electric connector whose main body is an insulating housing having the same number of terminal receiving passages for receiving a plurality of electric terminals. The housing further has a front mating surface for receiving a flat flexible cable with embedded conductive traces. The connector has a plurality of electrical terminals, and each terminal is provided with opposing contact portions that contact the traces of the flexible cable. The lever portion of each terminal is lifted by another member to open the facing contact portion. This connector is a cam in which the other member is close to the lever portion, and the cam is rotated to move the lever portion upward so that mutual contact between the cam and the lever portion is released.

The present invention has an insulating housing in which a plurality of terminal receiving passages are formed in parallel, a base portion fixed in the terminal receiving passage of the insulating housing, and a movable contact arm portion having a lever arm formed at a free end. A plurality of substantially flat plate terminals having contacts formed on opposite edges of the base portion and the movable contact arm portion, respectively, and a cam rotatably attached to the insulating housing and contacting the lever arm of the terminal. A rotating cam member having a surface and a window portion into which the free end of the lever arm projects, and a plurality of conductors are inserted between the both contacts of the terminal by expanding the contact gap by rotation of the rotating cam member. In addition, when the free end of the lever arm plunges into the window portion of the rotary cam member, the free end of the lever arm is formed by the spring force of the movable contact arm portion. The rotating cam member between the serial insulating housing is intended to provide a zero insertion force electrical connector, characterized in that it is clamped fixed.

According to the non-insertion force electric connector, since the rotational position of the rotary cam member into which a plurality of conductors can be inserted is held by the free end of the lever arm and the insulating housing, the rotary cam member is clamped and fixed to the rotary cam member. It is not necessary to provide a holding means such as a projection on the rotary cam member or the insulating housing to hold the member at the above position, and the detent of the rotary cam member can be performed with a simple and compact structure.

The present invention also relates to an insulating housing in which a plurality of terminal receiving passages are formed in parallel, a rotary cam member having a shaft and an arm portion arranged on a fitting surface of the insulating housing, and facing a solder leg and an open end, respectively. First contact is formed
A terminal having a substantially U-shaped portion and a plurality of substantially flat plate-shaped terminals having a second substantially U-shaped portion continuously formed at one end of the first substantially U-shaped portion in a direction opposite to the first U-shaped portion; Is inserted into the terminal receiving passage of the insulating housing, the second substantially U-shaped portion straddles the shaft of the rotary cam member, and when the rotary cam member is rotated, a plurality of conductors are inserted and connected. (EN) A non-insertion force electrical connector characterized by controlling contact spacing.

In a preferred embodiment of the present invention, an electrical terminal comprising a base portion and a movable spring portion is made by edge stamping a sheet metal. The upward protruding contact portion of the base portion is the first contact portion, and the downward protruding contact portion of the movable spring portion is the second contact portion located on the opposite side of the first contact portion. The lever portion of the contact body is located in front of the facing contact portion and projects toward the front.

In a preferred embodiment of the present invention, the cam actuating member is a rotary plate fixed to the cam shaft, and the cam shaft is rotatably mounted below the lever portion in the housing. The rotating plate portion of the cam has a plurality of through windows, and when the rotating plate rotates toward the end of the lever portion, the lever portion penetrates into the window and the allowable rotation angle increases. Preferably, the camshaft comprises a plurality of individual cam portions that are aligned with the lever portion.

Although the preferred embodiment of the present invention relates to a connector without a shield, it can be a connector with a shield by a simple modification. In the case of a connector with a shielding body, the shielding body is composed of the upper shielding wall body, the side shielding wall body, and the rear shielding wall body. The shield is also provided with latching means for attaching the shield to the housing body.

One feature of the electrical connector of the present invention is that the U-shaped contact near the wire (electric wire or conductor) access hole is the elastic contact portion. Preferably, the first and second contact arms form a U-shaped contact, and the second arm is first
Move between the arms by moving away from the arms. Preferably, a cam means is connected to the second arm, and the first and second positions are set by the cooperation of the cam means and the second arm. Preferably, the second arm is provided with a second U-shaped portion that is flush with the first U-shaped portion and has an opening in a direction away from the wire receiving surface.

The shaft of the cam means extends through the second U-shaped opening, and the eccentric of the second U-shaped opening moves the second U-shaped opening away from the first U-shaped opening as the shaft rotates. Move it laterally. Preferably, the second U-shaped portion is a bearing that rotatably supports the shaft, and the cam means is held in the housing. Preferably, the cam means further comprises a handle,
The handle is connected to the shaft to support the rotation of the shaft.

The method for manufacturing a terminal according to the present invention is characterized by the following steps: a terminal is stamped to form a horizontal pace portion, and a spring arm is projected from the horizontal base portion;
The first contact body protrudes from the spring arm toward the horizontal base portion, and the extension arm protrudes from the horizontal base portion at an acute angle with respect to the horizontal base portion in the opposite direction from the spring arm and is constant from the first contact portion. A second contact body is provided on the extension arm with a space therebetween; and then the extension arm is bent toward the spring arm to form the first contact,
The second contact portions are faced to each other and are placed at the facing positions.

After the edge stamping process, the first and second contact bodies are plated before bending the extension arm. Preferably, the extension arm is bent into the spring arm and the first and second contact portions are preloaded to contact one another. Preferably,
The holding arm is projected from the extension arm toward the second contact body.

In a preferred embodiment of the present invention, the housing is provided with a plurality of through holes into which the holding arms are inserted. The board mounting surface is integrated with the housing, and the board mounting surface is passed over the through hole in a direction perpendicular to the through hole. The floor of the through hole separates the boundary of the terminal receiving passage. The lower edge of the horizontal base portion abuts the floor portion.

(Examples) Hereinafter, preferred examples of the present invention will be described in detail with reference to the accompanying drawings.

Referring first to FIG. 1, the electrical connector 2 of the present invention connects the electrical traces of a flat flex cable FFC to a printed circuit board 210. A plurality of electric terminals 150 are held by the insulating housing 4 of the electric connector 2, the rotating cam member 100 is rotated counterclockwise as viewed in FIG. 1, and a flat flexible cable is applied without applying insertion force.
Move the terminal to the position where FFC is inserted. This type of electrical connector is commonly referred to as a no insertion force electrical connector (ZIF) connector.

The insulating housing 4 will be described in detail with reference to FIG. The insulating housing 4 is made of an insulating material such as a glass-filled thermoplastic material, and has an upper wall 6, a depressed surface 8, a rear surface 10,
It is composed of a lower mounting surface 12, side wall bodies 14 and 16 and a front fitting surface 18. A plurality of ribs 24 project toward the rear surface 10 from positions close to the front surface 18. At the front end of the rib is a beveled edge 26 and a plurality of juxtaposed semicircular edges 28. Multiple juxtaposed holes 50
Are aligned with the terminal receiving passage 54. As shown in FIG. 2, the boundaries of the terminal receiving passage 54 are partitioned by the side surfaces 56 and 58.

Referring now to FIG. 6, which shows the interior details of the housing, the sides 56, 58 bound the boundary of the terminal receiving passage 54, which is flush with the side of the hole 50 and the side of the rib 24. Although the side surface 56 is shown, the side surface 58 is a mirror image of the cross section shown in FIG. 6 because of the position of the cross section, and is the same as the side surface of the hole 50 and the side surface of the rib 24.

Referring now to FIGS. 4 and 6, the front surface 18 of the insulating housing 4 is shown.
Substrate receiving groove 20 is provided in a direction perpendicular to. Upper surface 34, lower surface 40 and a plurality of longitudinally elongated ribs 3
The boundary of the groove 20 is partitioned by 6,42. As shown in FIG. 4, a constant gap is alternately provided between the ribs 36 and 42 according to the position of the terminal, so that the vertical posture of the substrate can be easily aligned with the contact portion of the terminal. Referring again to FIG. 2, the rotary cam member 100 is held in the housing body by the through hole 84 of the insulating housing 4. Two notches 80,8 that are laterally offset from each other and open in opposite directions
The boundary of the hole 84 is divided by 2. In other words,
The hole 84 is made from two retractable mold members; the same mold member is fully inserted to make the holes 84 substantially flush with each other (flush) and then retracted to form the cutouts 80, 82. This time
Referring to FIGS. 2 and 8, there is another groove 70 behind the cutout 80, the boundaries of which are bounded by surfaces 72 and 74. 8th
Referring to the figure, the webs 27 and 29 hold the side walls 14 and 16 to the other part of the housing.

Referring to FIG. 2, the cylindrical portion 102 of the rotating cam member 100.
Are integrated with the plate portion 110. There are arcuate surfaces 104 between the cam surfaces 106 of the rotating cam member 100. Plate 110 has an upper surface 114, a lower surface 112 and a window 108 aligned with each cam surface 106.

Referring to FIG. 9, the contact portions (solder legs) 172 and 174 project vertically from the base portion 152 of the terminal 150, and the surface mounting portion 176 projects horizontally. Hold solder legs 172, 174, 176 selectively depending on the type of electrical connection desired to the printed circuit board. Holding arm 1
68 projects from the front of the base portion 152, and the holding arm 168 has a first contact 166. Vertical leg 154 is base 152
Projecting upwards and reaching a movable contact arm 158 via a U-shaped portion 156. There is a second contact 164 at the bottom of the lever arm 162 connected to the movable contact arm 158.

As for assembling the connector shown in FIG. 2, the rotary cam member 100 is inserted into the nest portion 22 of the housing, and the end portion 116 of the rotary cam member 100 is put into the hole 84 of the housing side wall. In the assembled state, the plate portion 110 of the cam is located between the position where the lower surface 112 of the plate portion contacts the upper surface 32 of the platform 30 and the position where the upper surface 114 of the plate portion 110 rotationally abuts the inclined surface 26 of the housing. Is freely rotatable between two stop positions.

The terminals are then stamped into the shape shown in FIG. 9; there are three solder legs 172, 174, 176, the holding arm 168 and the contact 166 making an acute angle with the base portion 152. Subsequently, the terminals are plated to form conductive surfaces on the contacts 164 and 166. If the terminals are stamped into the shape as shown in FIG. 9, there will be enough clearance along the shearing edge of the contact to make contact 164,
Reserved during 166. Holding plate 168 after plating
9 and the contact 166 are turned counterclockwise as shown in FIG. 9 to bring the contact 166 into contact with the contact 164 on the opposite side, and are further rotated to slightly bend the contact 164 to preload in a direction facing the opposite contacts 164, 166. multiply. The terminal portion 170 has a smaller cross-sectional area than the other portions, so that the terminal can be easily bent accurately at a desired position without applying a large stress that may cause a crack. Further, in a preferred embodiment of the present invention, a phosphor / bronze alloy is used as the material of the terminal so that it can be bent easily. In a preferred embodiment of the present invention, the plating is tin plating; it has been confirmed that the tin plating allows the portion 170 to be bent easily without cracking. Even if some cracks occur, the turning position, that is, the turning position around the portion 170 is separated from the contact portion, and there is no fear of affecting the electrical characteristics.

After pre-loading the contacts 150 as described above, the terminals are stamped to form through-hole solder joints or surface mount (surface mount) joints. In a through-hole solder joint as a preferred embodiment, the soldering leads are bound in a zigzag arrangement, and the center line spacing of contacts formed by green stamping is reduced. That is, as shown in FIG. 9, every other contact 150 has a solder leg 172 and another contact 150 has a through hole solder leg 174. When the surface mount joint is used, the solder legs 172 and 174 are cut off cleanly from the stamped terminals, and the surface mount leads 176 are left.

If the terminal is stamped and formed into the desired shape, the terminal
The 150 can be inserted into the electrical housing (see Figure 5). Retaining arm 168 is placed in hole 50 in the housing and the terminals are retained by an interference fit. Holding arm 16
The counter contacts 164, 169 (Fig. 9) are held in a preloaded state in order to fix the 8 in the hole 50 and to apply the rim 178 to the lower surface 51 of the hole 50 (see Fig. 5). It In other words, the retaining arm 168 will rotate in the clockwise direction about the pivot point (position) 170 when it is not loaded in the housing to release the original preloaded state. And However, the holding arm 168 and the base portion 152 are fixed and held straight by the hole 50,
The preloaded state of the two opposing contacts 164, 166 will not be released.

We have found that the use of cams for small components is extremely advantageous. As an example, the height between the surfaces 6 and 12 of the housing shown in FIG. 2 is only 4 mm, 0.1 to 0.3 mm (the distance between the conductor centers is only 0.025 in).
The flat flexible cable can be connected to the connector.
A first advantage is that actuators can be used that do not significantly increase the overall height of the connector provided that the minimum height of the electrical connector is fixed. In order to achieve this object, the applicant of the present invention has designed a cam having a great mechanical merit because the rotation angle of the cam means between the two stoppers is large as described above. To ensure this great mechanical advantage, align the windows 108 with each cam.
On the board. After the lever arm 162 has passed through the cam surface 106, the lever arm 162 has passed through the window portion 108, the rotation angle of the cam means is increased, and the mechanical advantage is increased when pulled.

Another advantage of the window 108 is that when the rotary cam member 100 reaches the maximum position where the rotary lever arm 162 projects into the window 108 (FIG. 4), the rotary cam member 100 bends to move the movable contact arm 158.
The spring force acting on the cam is applied to the cam, and the cam is held in the upper position. The rotating cam member 100 is held by this bending force, and the contact is held in a bent state in which the cable is inserted. Therefore, the flat flexible cable can be easily inserted as long as there is a small space for accessing the connector. In fact, this detent position
You can insert the cable with one hand. (Printed circuit boards with high mounting density of elements can often only be used with one hand).

A third advantage of the cam means is that there is a rib 26 within each circular portion 104, and each circular portion 104 causes each cam surface 106 to be seated within one terminal receiving passage 54 and each terminal receiving passage 54. The cam surface 106 is held in juxtaposed alignment with the lever portion 162 of the terminal such that the lever portion receives the terminal receiving passage 54.
Held in and aligned with the cam portion 105.

As previously mentioned, the connector is either a through hole mounting design or a surface mounting design. In the case of the surface mounting design, the holder 200 shown in FIG. 7 and the like is inserted into the recess 70 and latched. As shown in FIG. 7, the bifurcated arm 202 of the holding body 200.
The locking shoulder of the lower arm is fully inserted and latched behind the shoulder 204 of the web 29. Subsequently, the legs of the holder 200 are soldered to the printed circuit board, and the connector is attached to the printed circuit board. It is also possible to solder or latch the through hole post projected from the holder to the printed circuit board.

As shown in FIG. 11, the housing of the connector with a shield is the same as the housing of the connector without a shield. An optional shield 300 consisting of an upper shield 302 and a shield side wall 304 can be added to the connector 2. Although it is passed between the rear shield upper wall 302 and the side wall 304, the rear wall is invisible because FIG. 11 is a perspective view. To hold the shield in the insulating housing 4, 2
One holding arm 308 is cut off from the side wall body 304 along the slit 306. The latch means 310 at the end of the holding arm 308 is the same as the latch means 202 (FIG. 7) and latches on the locking shoulder 204 as shown in FIG. The shielded connector is very advantageous because the electrical connector design shown in FIG. 1 is very good. For example, the rotating cam member 100 is much smaller than the rest of the connector housing. Further, since the rotating cam member 100 operates only in a very small portion inside the connector housing, it can shield the other portion of the connector housing. No.
The shield shown in FIG. 11 can also be provided with through-hole posts that connect to ground traces on the printed circuit board.

As shown in FIGS. 12 and 13, the horizontal type shown in FIGS. 1 to 10 is preferable, but the same housing as in the horizontal type can be used to form a vertical connector. Therefore, only the shape of the terminal is modified. (See Figures 12 and 13).

Thus, due to the good design of the electrical connectors, it is possible to use the exact same housing to realize several different types of systems. As an example, the cam of an electrical connector is much smaller than the rest of the connector because of the mechanical benefits of the connector. The connector can also be lateral through-hole type, horizontal through-hole type, vertical through-hole type, and vertical surface-type. In addition, a through-hole mounting type connector or a surface mounting type connector can be manufactured by the same stamping process for both the horizontal type and the vertical type. Finally, any type of connector described above can be provided with an electrical shield.

Referring now to Figures 14 and 15, the connector 702 of the present invention may connect the conductor 702 of the flat ribbon cable 700 to a printed circuit board trace of a printed circuit board. Electrical connector 60
Insulation housing 604, multiple terminals as main components of 2
There is a 630 as well as a rotating cam member 670.

Referring also to FIGS. 14-17, the insulating housing 604 has a wire receiving surface 606 and a mounting surface 608 for abutting against a printed circuit board. A plurality of wire receiving holes 610 provided in the wire receiving surface 606 communicate with the terminal receiving passage 612 (see FIG. 16). A protruding portion 614 of the insulating housing 604 projects from the front surface of the housing, and the protruding portion 614 is provided with a plurality of juxtaposed grooves 620. As shown in Figure 15,
There is a contoured recess 616 on the upper surface of the insulating housing 604.

Next, the terminal 630 will be described in detail with reference to FIG.
The first U-shaped portion 634 of the terminal 630 is bounded by a first arm 636 and a second arm 638. First arm 636,
There are wire contacts 640 and 642 respectively at the free end of the second arm 638. The second U-shaped portion 648 commonly uses the second arm 638 of the first U-shaped portion 634, and the bending portion 644 and the third arm 646.
Formed by 1st U-shaped part 634 and 2nd U-shaped part 6
Both 48 are connected to the rest of the terminal via a web portion 650 which connects both U-shaped portions to the leg 652. The leg 652 is the main body with the circuit board post 656 protruding downward.
It is integrally connected to the 654.

Referring again to FIG. 14, the arm portion 672 of the rotating cam member 670 is connected to the horizontal shaft 674 that blocks the front surface of the connector. There are a plurality of grooves 676 along the width of the horizontal shaft 676, each groove having a cam portion. As shown in FIGS. 16, 17, 18 and 19, the cam is generally circular, but there are two flat parallel portions removed from the cylindrical portion along the longitudinal direction of the cylindrical portion, as shown in FIG. An eccentric 680 is formed as described above.

As to the method of assembling the connector 602, the rotating cam member 670 is set in the insulating housing 604, the arm 672 is placed in the recess 616, and the shaft is placed on the mandrel 614. Then terminal 630
Through the top surface 606 and into the terminal receiving passage 612,
656 is projected from the lower surface 608 so that the upper edge of the terminal 630 and the upper surface 606 of the connector housing are substantially flush with each other. As shown in FIG. 16, the second U-shaped portion of the terminal overlaps the horizontal shaft portion and holds the rotating cam member 670. In addition, the free side end of the third arm fits into the mating groove 620 and prevents lateral movement of the terminal and the rotary cam member 670. This assembly does not require a holding (latching) means between the cam and the housing because the terminal itself holds the cam, does not require sophisticated molding equipment, has a simple structure and is extremely functional. Stakeholders will understand that it is a good electrical connector.

In Figures 16 and 17, this electrical connector can be used to connect the solid conductors of the multi-conductor cable 700 to printed circuit board traces simply by turning the handle from the position shown in Figure 16 to the position shown in Figure 17. it can. In the position shown in FIG. 16, the flat surface of the cam 678 is adjacent and parallel to the third leg portion 646 of the terminal. Eccentric part if the cam is moved to the position shown in Fig. 17.
680 contacts the third leg 646, which is an extension of the first leg 636 and the second leg 638, and separates the two contacts 640, 642 from each other by a certain distance. This electrical terminal / cam system is contour ground and the gap between contacts 640 and 642 allows a bare conductor to be inserted between the contacts without applying insertion force, so the system is generally uninserted. Power (ze
ro insertion force ZIF) connector. With the conductor 702 fully inserted between the contacts 640 and 642, the cam 670 can be returned to the first position of FIGS. 14 and 16 to bring the contacts 640 and 642 into contact with the conductor. When the electrical terminals are in the free state shown in FIG. 22, the gap between the contacts 640 and 642 is smaller than the diameter of the conductor to be contacted.

Therefore, if a conductor is placed between the two contacts, the U-shaped part
634 and the two arms 636 and 638 provide the stored energy electrical connection to conductor 702. Further, it can be seen from FIGS. 17 and 22 that the spring does not interfere with the electrical connection between the post 656 and the printed circuit board at all due to the shape of the electrical terminal 630.
As shown in FIG. 22, the leg portion 652 and the first U-shaped portion 634 are isolated from the main body 654 of the terminal 630. That is, the U-shaped portion 634 is simply connected to the leg portion 652 of the terminal via the web 650. Therefore U-shaped part 634
Bends in relation to other parts of the terminal when the cam of the first U-shaped part is operated.

Another embodiment of the invention is shown in FIGS. 18-21 and a flat terminal blank is shown in FIG. The components are substantially the same in any of the embodiments, and the component numbers of the second embodiment are indicated by adding ('). The second embodiment is a wire receiving surface for inserting the multi-conductor cable in the horizontal direction instead of the vertical direction as in the case of the first embodiment.
The biggest difference from the first embodiment is the presence of 606 '. It is desirable to design the terminals so that only the position of the post 656 or 656 'is changed and the same mold can be used for both the first and second embodiments.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cam and a terminal assembled in a housing. FIG. 2 shows the connector before mounting the terminals and cams,
It is a perspective view of the same kind as FIG. FIG. 3 shows the connector with the terminals not flexed,
FIG. 3 is a perspective view similar to FIGS. 1 and 2 with a part removed. FIG. 4 is a perspective view of the same kind as FIG. 3, showing a state in which the cam is completely rotated and the contact is bent to receive the flat cable. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view similar to FIG. 5, but without electrical terminals. FIG. 7 is a sectional view taken along line 7-7 of FIG. FIG. 8 is a cross-sectional view of the same type as FIG. 7, but without holding terminals. FIG. 9 is a side view of the incomplete electric terminal. FIG. 10 is a side view of the surface mount type electrical connector. FIG. 11 is a perspective view of the same kind as FIG. 1, showing an electric connector with a shield. FIG. 12 is a cross-sectional view of a vertical type through-hole mounting electrical connector. FIG. 13 is a cross-sectional view of the surface-mounted electric connector. FIG. 14 is a perspective view of a multi-conductor cable connector as one embodiment. FIG. 15 is a perspective view of the same kind as FIG. 14, showing a state in which the cam arm is in the contact open position and the conductor is inserted with no insertion force. FIG. 16 is a perspective view similar to FIG. 14 with a part removed. FIG. 17 shows the cam arm in the upper position,
FIG. 16 is a perspective view similar to FIG. 15 with a part removed. FIG. 18 is a perspective view showing a state of receiving a wire of the electric connector according to the second embodiment of the present invention. FIG. 19 is a perspective view of the same kind as FIG. 18, with the cam arm in the upper position and ready to receive the conductor. FIG. 20 is a perspective view similar to FIG. 18 with a part removed, showing a state before operating the cam arm. FIG. 21 is a perspective view of the same kind as FIG. 20, in a state in which the cam arm is operated to open the terminal and receive the conductor. FIG. 22 is a plan view of the terminal of the first embodiment. FIG. 23 is a front view of the terminal of the second embodiment. 2,602,602 ′ …… Electrical connector 4,604 …… Insulation housing 18 …… Front fitting surface, 54 …… Terminal receiving passage 100 …… Rotating cam member, 102 …… Cylinder part 105 …… Cam part, 106 …… Cam surface 108 ...... Window part, 116 …… Cam end part 150 …… Terminal, 152 …… Base part 156 …… U-shaped part, 158 …… Movable contact arm 162 …… Lever arm, 164,166 …… Contact point 168 …… Holding arm, 172 ...... Solder leg 178 …… Edge 202 …… Bifurcated arm (electric trace of flat flexible cable) 606 …… Top surface, 612 …… Terminal receiving passage 630 …… Terminal 634 …… 1st U-shaped part, 636 …… 1 leg (arm) 638 …… 2nd leg (arm), 640,642 …… contact point 646 …… 3rd leg part, 648 …… 2nd U-shaped part 652 …… leg, 670 …… rotating cam member 678 …… cam, 702 ... conductor

Claims (2)

(57) [Claims] 1. An insulating housing in which a plurality of terminal receiving passages are formed in parallel, a base portion fixed in the terminal receiving passage of the insulating housing, and a movable contact arm portion in which a lever arm is formed at a free end. A plurality of substantially flat plate-shaped terminals each having contacts formed at opposing edges of the base portion and the movable contact arm portion, and rotatably attached to the insulating housing, and the lever arms of the terminals come into contact with each other. A rotary cam member having a cam surface and a window portion into which the free end of the lever arm projects, and the rotation of the rotary cam member expands the distance between the contacts to insert a plurality of conductors between the contacts of the terminal. When the free end of the lever arm is pushed into the window portion of the rotary cam member, the lever arm is freed by the spring force of the movable contact arm portion. Zero insertion force electrical connector the rotary cam member, characterized in that it is clamped fixed between the insulating housing and. 2. An insulating housing having a plurality of terminal receiving passages formed in parallel, a rotary cam member having a shaft and an arm portion arranged on a fitting surface of the insulating housing, and facing a solder leg and an open end, respectively. A substantially flat plate having a first substantially U-shaped portion on which a contact point is formed, and a second substantially U-shaped portion continuously formed in one end of the first substantially U-shaped portion in the opposite direction. A plurality of terminals, the second substantially U-shaped portion straddling the shaft of the rotating cam member when the terminals are inserted into the terminal receiving passage of the insulating housing, and the plurality of conductors when rotating the rotating cam member. A non-insertion force electrical connector, characterized in that the contact spacing of the terminals to be inserted and connected is controlled.