KR101437524B1 - Connector - Google Patents

Abstract

The present invention relates to a connector including a plurality of contacts on the surface of which surface layer plating containing Sn is performed, and more particularly to a connector capable of effectively suppressing the occurrence of whiskers in a contact.
The present invention relates to an insulator (20) capable of attaching and detaching a connection object (60) on a thin plate, and an insulator (20) arranged side by side in each insulator, contacting the connection object inserted in each insulator A pressing member 50 having a plurality of contacts 30 on which the contact object A is applied and a pressing portion for pressing the contact object and the contact while pressing the to-be-pressed portion 34a formed on the surface of each contact, Wherein the urging member urges the contact portion between the locking position for increasing the contact pressure between the connection object and the contact while pressing the portion to be pressed formed on the surface of each contact by the pressing portion and a releasing position Wherein the actuator is rotatably installed in the insulator, and the actuator On the surface, there is a support part for rotatably coupling the pressing part. On the bottom surface of each support recess part, when the surface layer plating containing Sn applied to the surface of the contact by heat such as reflow together with the to- The plating intervention preventing recess 34b is formed in which a part of the surface plating that flows down is prevented from being formed excessively thick due to the falling surface plating.

Description

Connector {Connector}

The present invention relates to a connector including a plurality of contacts on the surface of which surface layer plating containing Sn is performed, and more particularly to a connector capable of effectively suppressing the occurrence of whiskers in a contact.

Patent Document 1 shows a connector capable of connecting an FPC (Flexible Printed Circuit). The connector includes an insulator (connector main body) capable of attaching and detaching the FPC, a plurality of contacts (terminals) brought into contact with the FPC inserted into the insulator, and an actuator rotatably attached to the insulator. The actuator has a pressing portion that is rotatably coupled to a concave portion formed at a distal end portion of each contact while being a rotation center. The actuator rotates between a locking position for pressing the FPC to the contact side and a releasing position for being parallel to the attaching / detaching direction and extinguishing the pressing force against the FPC, perpendicular to the attaching / detaching direction of the FPC with respect to the insulator.

JP Patent Publication No. 2002-134194 JP Patent Publication No. 2005-056605

Conventionally, the surface of a contact has been plated, and it has been the mainstream to perform plating including lead (Pb). However, with increasing awareness of environmental problems, Sn (tin) -Cu (copper) plating that does not contain Pb has become the mainstream in place of Pb plating.

However, when reflowing is performed when each contact is soldered to the circuit pattern of the circuit board, the Sn-Cu plating on the contact surface is melted due to the heat due to the reflow, and the Sn-Cu plating thickness at the contact position becomes uneven.

When the actuator is located at the lock position, when the pressurized portion of the actuator is positioned in the thick portion of the Sn (tin) -Cu (copper) plating, a concentrated load is continuously applied to the portion, .

Whiskers are needle-shaped protrusions protruding from the surface of the plating when strong pressure is continuously applied to the plating containing Sn applied to the contact. In recent years, miniaturization of the connector and downsizing of the pitch between the contacts have caused a fear that the whiskers generated in the contact may come into contact with the adjacent contacts. If contact occurs, short-circuiting occurs between the contacts.

In order to solve this problem, various measures have been conventionally established. For example, in the invention of Patent Document 2, the material (composition) of Sn plating to be contacted is studied.

However, conventional countermeasures against whiskers can not be said to be sufficient measures.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a contact in which surface contact plating containing Sn is applied with a strong force continuously from other members, and whisker generation in the surface layer plating can be effectively suppressed.

The present invention relates to an insulator capable of attaching and detaching a connection object on a thin plate, a plurality of contacts provided in parallel on one insulator in one direction, contacting the connection object inserted in each insulator, And a pressing portion having a pressing portion that presses the to-be-pressed portion formed on the surface of each contact and increases the contact pressure between the connection object and the contact, wherein the pressing member is configured such that the pressing portion is formed on the surface of each contact An actuator that relatively moves between a lock position for increasing the contact pressure between the connection object and the contact while pressing the pressurized portion and a release position for which the influence of the contact pressure is not affected by the insulator, On the surface of the contact, A surface plating layer containing Sn applied to the surface of the contact by heat such as a reflow together with the to-be-pressed portion is formed on the bottom surface of each support recess, The plating intervention prevention recessed portion into which a surface plating flowing down so as not to be excessively thick in the surface layer plating is formed.

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In the present invention, a plating intervention preventing recess is formed in a pressed portion (a portion pressed by the pressing portion of the pressing member) or a contacting portion (a portion contacting other contacts) formed on the surface of the contact.

Therefore, even if the surface layer plating containing Sn applied to the surface of the contact by heat such as reflow is melted, the molten surface plating does not flow to the pressure side or the contact side but flows into the plating intervention preventing recess. Furthermore, the surface layer plating formed on the recess for preventing plating interference also does not flow to the pressure side or the contact side. Therefore, it is difficult for the surface layer plating to be formed excessively thick on the pressed portion or a part of the contact portion.

As a result, there is less possibility that a concentrated load will be generated in this portion due to formation of a thick portion in the surface layer plating formed on the pressed portion or the contact portion as compared with the peripheral portion. Therefore, if the pressed portion of the actuator on the pressed portion of the contact is continuously And whiskers are not likely to be generated at the contact portion of the contact even if another contact is continuously contacted for a long period of time.

1 is a front exploded perspective view of a connector according to a first embodiment of the present invention;
2 is a rear exploded perspective view of the connector;
3 is a perspective view of the connector and the FPC when the actuator is positioned at the open position;
4 is a perspective view showing a state where the actuator is positioned at the open position and the FPC is inserted into the connector.
Fig. 5 is a front view of Fig. 4; Fig.
6 is a sectional view taken along a line VI-VI in Fig. 5;
7 is a cross-sectional view taken along line VII-VII of FIG. 5;
Fig. 8 is a sectional view corresponding to Fig. 6 when the actuator is rotated to the closed position with the FPC inserted in the connector; Fig.
9 is an enlarged view of part IX of Fig.
10 is a perspective view showing a separated state of a plug connector and a receptacle connector according to a second embodiment of the present invention;
11 is a cross-sectional view taken along the line XI-XI in Fig.
12 is a perspective view of the receptacle connector;
13 is a sectional view taken along line XIII-XIII in Fig. 12;
14 is a perspective view showing a state in which a plug connector and a receptacle connector are combined;
15 is a sectional view taken along the line XV-XV in Fig.
16 is an enlarged view of the portion XVI of FIG.
Fig. 17 is a sectional view corresponding to Fig. 8 as a modified example. Fig.
Fig. 18 is a cross-sectional view corresponding to Fig. 8 as another example; Fig.

Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 to 9. Fig. In the following description, front, rear, left and right, and up and down directions refer to arrow directions in the drawing.

The connector 10 according to the present embodiment is a front locking type connector and is largely composed of an insulator 20, a signal contact 30, a fixing metal 40 and an actuator 50 (pressing member).

The insulator 20 is formed by injection-molding an insulating and heat-resistant synthetic resin material. An FPC insertion port 21 having a pair of left and right insertion recessed portions 21a having the same width as that of the FPC 60 (contact object) is formed at the front side of the upper surface of the insulator 20. The front surface and front upper surface of the FPC insertion port 21 are open and the rear side of the FPC insertion port 21 extends to the inside of the insulator 20 (see FIG. 6). A pair of side walls 22 are formed on both left and right sides of the front side of the insulator 20. A closed position maintaining recessed portion 23 is formed on the inner side surfaces of the left and right side walls 22. Further, a pair of right and left lateral concave portions 24 are formed on the inside of the left and right side walls 22. On the upper surface (bottom surface) of the left and right side concave portions 24, a front end is opened with respect to the front end surface of the insulator 20, and a fixing metal 25 is opened. The fixing metal fitting 25 extends to the rear end surface of the insulator 20 (see Figs. 2 and 7). A pair of left and right front end walls 26 protrude from the front end of the insulator 20 and upper ends of the left and right front end walls 26 are formed of a rotation restricting portion 27 having a horizontal plane. At both left and right ends of the lower surface of the insulator 20, a lower hole 28 communicating with a lower end opening of the fixing metal 25 is tapered. A total of 15 contact insertion openings 29 are formed in the insulator 20 in the forward and backward directions. The rear side of each contact insertion port 29 penetrates the rear side of the insulator 20 in the front-rear direction, and the front side of each contact insertion port 29 is laid on the bottom surface of the FPC insertion port 21. [

A total of 15 signal contacts 30 are formed by molding a thin plate of a resilient copper alloy (for example, bronze, beryllium copper, titanium copper) or a Colson type copper alloy into an urban form using a net transfer type (stamping) , Sn (tin) -Cu (copper) plating (A) (see FIG. 9 and the like). As shown in Figs. 1, 2 and 6, the signal contact 30 is of a "co" shape as viewed from the side and has a contact arm 31 having a contact projection 32 at its tip, A pushing arm 33 having a support recess 34 at the front end of the lower surface and a tail piece 35 protruding from the rear end. As shown in detail in FIG. 9, the cross-sectional shape of the support recess 34 is a base (square). A pressed portion 34a is formed on the bottom surface (upper surface) of the supporting recess 34 and a plated interference preventing recess 34b having a semicircular sectional shape is formed on the pressed portion 34a.

Each signal contact 30 is press-fitted into each contact insertion port 29 of the insulator 20 from behind. 6, when the respective signal contacts 30 are pressed into the contact insertion port 29, the contact arm 31 and the pressing arm 33 are positioned in the FPC insertion port 21, and the pressing arm 33 The signal contact 30 is fixed to the contact insertion port 29 while the insertion protrusion 36 protruding from the upper surface of the contact insertion hole 29 is inserted into the upper surface of the corresponding contact insertion hole 29. The tail piece 35 protrudes rearward of the insulator 20 and its lower surface is located below the lower surface of the insulator 20. [

The pair of left and right fixing brackets 40 are press-molded products of a metal plate, and are composed of a tail piece 41 formed laterally, a press-in portion 42 formed rearward and having a fitting protrusion 43 on its upper surface, And a protruding support protrusion (44). The upper end surface of the support protrusion 44 is composed of a support surface 45 which is a horizontal surface.

The fastening metal 40 is press-fitted into the press fitting portion 42 from the front with respect to the left and right fastening fittings 25 and fixed to the insulator 20. The fitting protrusion 43 protruding from the upper surface of the press fitting portion 42 is inserted into the upper surface of the rear end portion of the fixing fitting 25 so that the fixing fitting 40 is inserted into the insulator (Not shown). The tail piece 41 is located in the lower hole 28 and the lower surface of the tail piece 41 is located at the same height as the lower surface of the tail piece 35. [ Further, the support protrusion 44 protrudes into the side recess portion 24 through the fixing metal fitting 25 (located above the bottom surface of the side recess portion 24, see Figs. 3 and 7).

The rotary actuator 50, which is a plate-shaped member formed in the left-right direction, is formed by injection molding using heat-resistant and synthetic resin materials using a metal mold. A side arm arm 51 is provided at each of left and right side portions and a closed position holding protrusion 52 is formed on the side of the side arm arm 51. [ The closed position retaining projection 52 is hemispherical in shape and its diameter is smaller than the upper and lower values of the closed position retaining recess 23 when the actuator 50 is located at the closed position described later. A total of fifteen through holes 53 passing through the actuator 50 in the plate thickness direction are formed in the lower end portion of the actuator 50 in the left and right direction. Each of the through holes 53 is directly below the through holes 53, The rotation center shaft 54 is formed with the lower end of the rotation center shaft 54 as a reference. And a total of sixteen cam portions 55 are provided at the lower end portion of the portion located between the through holes 53 adjacent to each other. When the actuator 50 is inclined upward (when the actuator 50 is positioned at the closed position, which will be described later), it is inclined upward with respect to the peripheral portion in the widthwise center portion of the free end (opposite end of the rotation center shaft 54) And the operating portion 56 is formed so as to protrude therefrom. A contact portion 57 having a plane formed in the left and right direction with the left and right side arm portions 51 interposed therebetween is provided at the proximal end side portion of the front face of the actuator 50 (the portion on the rotation center shaft 54 side). On both left and right ends of the front face of the actuator 50, there is provided a supported portion 59 which is a plane formed obliquely with respect to the contact portion 57.

As shown in Figs. 1 and 2, the actuator 50 is inserted into the FPC insertion port 21 at its base end (the end on the side of the rotation center shaft 54) in a state of being orthogonal to the insulator 20 The pressing arm 33 of the signal contact 30 corresponding to each of the through holes 53 is inserted to engage the support recess 34 with the rotation center shaft 54 (see FIGS. 6 and 8) The proximal end portion of the side arm arm 51 is supported on the insulator 20 and the fixing bracket 40 by being placed on the support surface 45 of the left and right fixing brackets 40 (see FIG. As the proximal end portion of the side arm arm 51 is supported on the support surface 45 as described above, the coupling relationship between the support proximal portion 34 of each signal contact 30 and the corresponding rotation center shaft 54 is maintained, 50) is disposed at an open position (a position shown in Fig. 3, Fig. 7) that is inclined slightly rearward than a position orthogonal to the insulator 20 (the attaching / detaching direction of the FPC 60) (The position shown in Fig. 8), which is a position where the rotation center axis 54 is located. When the actuator 50 is rotated to the closed position, the left and right closed position holding projections 52 are engaged with the left and right closed position holding recesses 23, so that the actuator 50 is closed as long as the actuator 50 is not rotated to the open position intentionally Position to the open position.

A method of mounting the connector 10 having the above configuration on the circuit board CB and a method of connecting the FPC 60 to the connector 10 will be described.

First, the connector 10 is attached to the upper surface (circuit forming surface) of the circuit board CB (see the virtual line in Figs. 6 to 8) parallel to the attaching / detaching direction (front-back direction) of the FPC 60 with respect to the insulator 20, As shown in Fig.

The actuator 50 of the connector 10 is positioned at the closed position without inserting the FPC 60 into the insulator 20 first. At this time, since the supported portion 59 of the actuator 50 is in a horizontal state and is supported by the left and right rotation restricting portions 27 of the insulator 20, the actuator 50 is rotated downward due to its own weight or inadvertent pressing operation Do not.

In this state, a suction means (not shown) is positioned above the connector 10 to suck the upper rear surface of the insulator 20 of the connector 10, and then the suction means is moved so that the tail piece of each signal contact 30 When the tail pieces 41 of the left and right fixing brackets 40 are soldered to the ground pattern in a state in which the solder paste 35 is applied to the circuit pattern CB on the circuit board CB The mounting to the circuit board CB is completed.

A part of the Sn-Cu plating (A) applied to the surface of the signal contact 30 by the heat of the reflow can be melted. However, the Sn-Cu plating A applied to the surface of the supporting recess 34 does not flow to the side of the pressurized portion 34a (the central portion) and flows toward the plating intervention preventing recess 34b, and the plating intervention preventing recess 34b Since the Sn-Cu plating (A) is assembled into the plating intervention preventing recess 34b, excessive thick Sn-Cu plating (A) can be prevented from being formed on a part of the pressed portion 34a.

Next, a method of connecting the FPC 60 to the connector 10 will be described.

The FPC (Flexble Printed Circuit) 60, which is a connection object, is a thin plate-like mount capable of being elastically deformed, and its thickness is set such that when the actuator 50 is positioned at the open position (the contact arm 31 of the signal connector 30) The gap between the cam portion 55 and the contact projection 32 when the pressing arm 33 and the pressing arm 33 are in the free state). The FPC 60 has a stacked structure in which a plurality of thin film members are adhered to each other. A total of five circuit patterns (not shown) formed linearly along the extending direction of the FPC 60 are formed on the lower surface of the FPC 60 in the left- And the lower surface of the portion of the circuit pattern excluding both ends is covered with the insulating cover layer. And a pair of right and left fitting portions 61 protrude from the end portions.

The actuator 50 is first rotated to the open position to insert the end portion of the FPC 60 from the front of the FPC insertion port 21 and then the left and right fitting portions 61 are inserted into the insertion recess portions 21a (see Fig. 4). In this state, when the actuator 50 is rotated forward to the closed position, the cam portions 55 and the contact portions 57 of the actuator 50 come into surface contact with the upper surface of the FPC 60, The circuit pattern of the FPC 60 can reliably contact the contact protrusions 32 while elastically deforming the contact arms 31 of the respective signal contacts 30 downward (refer to FIG. 8) .

When the actuator 50 is rotated from the open position to the closed position, the pressing force is continuously applied from the outer circumferential surface of the rotation center shaft 54 to the pressed portion 34a.

However, as described above, when the thick Sn-Cu plating A is not formed on a part of the to-be-urged portion 34a of the signal contact 30 (that is, the portion where the concentrated load is applied to the rotation center shaft 54) The whiskers are generated in the Sn-Cu plating (A) applied to the to-be-pressed portion 34a, and the whiskers are generated to the signal contacts 30 There is little possibility of coming into contact with the adjacent signal contact 30. Therefore, there is a low possibility that short-circuiting occurs between adjacent signal contacts 30 due to whiskers.

The following Table 1 shows the results of the experiment on occurrence of whiskers in the connector of this embodiment, and Table 2 shows the results of the experiment on whisker occurrence in the comparative examples.

The conditions of the experiment are as follows.

1. The total thickness of the nickel plated / Sn-Cu plating is 3 to 6 탆

2. Reflow at 250 ℃ × 1 time

3. Insert the FPC into the connector and rotate the actuator to the open position

4. Leave at room temperature for 120 hours

5. After left standing, 500 signal contacts are observed (only whiskers having a length of 20 μm or more are counted as the occurrence of whiskers and the number of length measurement occurrences)

Next, a second embodiment of the present invention will be described with reference to FIGS. 10 to 16. FIG.

The connector 70 of the present embodiment is used, for example, in a programmable logic controller (PLC) and has a plug connector 80 and a receptacle connector 100 that can be coupled and disconnected from each other.

First, the overall structure of the plug connector 80 will be described.

The plug connector 80 is composed of a plug insulator 81 injection-molded of an insulating and heat-resistant synthetic resin material and a plurality of plug contacts 84 and 90 fixed to the plug insulator 81.

The plug insulator 81 has an engaging protrusion 82 that is engaged with the engaging recess 104 of the receptacle insulator 101. Two types of plug contacts 84 and 90 are provided in the inner space of the plug insulator 81, Respectively.

The plug contact 84 and the plug contact 90 are all integrally obtained through stamping and are formed by stamping and molding a base material (for example, ring bronze, beryllium copper, titanium copper, stainless steel, Colson alloy) Cu (copper) plating (A) (see FIG. 16 in detail) after the plating (for example, nickel (Ni) plating) is carried out. A total of ten plug contacts 84 are fixed to the inner wall surface of the plug insulator 81 in a form erected parallel to the longitudinal direction of the plug insulator 81 and one end portion of the plug insulator 81 protrudes to the outside of the plug insulator 81 And a part (85). The other end of each plug contact 84 is formed of a linear tip contact portion 86 fixed to the inner wall of the engaging projection 82. [ A total of ten plug contacts 90 are fixed to the inner wall surface of the plug insulator 81 in a state of being juxtaposed in the longitudinal direction of the plug insulator 81. One end of the plug contacts 90 protrudes outside the plug insulator 81 (91). The other end of each plug contact 90 is formed of a straight tip contact portion 92 fixed to the inner side wall of the engaging protrusion 82 so as to face the plug contact 84. As shown in the figure, the opposing surfaces of the tip contact portions 86 and the respective tip contact portions 92 are formed so that the receptacle contacts 106 (the deformation contact portions 109) when the plug connector 80 and the receptacle connector 100 are engaged, And a contact plane 87 (93) in contact with the receptacle contact 112 (deformation contact portion 115), respectively. Plating interference preventing recessed portions 87a and 93a whose arc-shaped cross section is formed on the contact planes 87 and 93 (see FIGS. 11, 15, and 16). The portions immediately before the plating interfering prevention portions 87a and 93a on the contact planes 87 and 93 are contact portions 87b and 93b which are respectively continuous to the plating intervention preventing recess portions 87a and 93a consist of.

The suction means moves while the plug connector 80 is attracted to the suction means (not shown) positioned above and the frame portions 85 and 91 of the plug contacts 84 and 94 move to the circuit board CB1, (Not shown) on the circuit pattern (not shown), and the solder paste is heated and melted by the reflow furnace so that the tees 85 and 91 are soldered to the circuit pattern, (CB1) is completed.

A part of the Sn-Cu plating (A) applied to the surfaces of the plug contacts 84 and 90 can be melted by the heat of the reflow. However, the Sn-Cu plating A applied to the surfaces of the contact portions 87b and 93b (the right end portions of the contact portions 87b and 93b in Figs. 11 and 15) is on the contact portions 87b and 93a side Cu interference preventive plating A applied to the recessed portions 87a and 93a for preventing plating interference flows into recesses 87a and 93a for preventing plating interference without flowing into the plating interfering prevention recesses 87a and 93a, ) 93a. The plating interfering preventing recessed portions 87a and 93a of the contact planes 87 and 93 are narrowed and the Sn-Cu plating A applied to the portion located on the opposite side of the contact portions 87b and 93b contacts the contact portions 87b Cu plating A flows only into the plating intervention preventing recessed portions 87a and 93a and flows to the contact portions 87b and 93b side Do not. Therefore, excessive formation of the Sn-Cu plating (A) on the portions of the contact portions 87b and 93b can be suppressed.

Next, the overall structure of the receptacle connector 100 will be described.

The receptacle connector 100 is composed of a receptacle insulator 101 injection-molded of an insulating and heat-resistant synthetic resin material and a plurality of receptacle contacts 106 112 fixed to the receptacle insulator 101.

The receptacle insulator 101 has a central projection 102 and an outer peripheral annular wall portion 103 surrounding the central projection 102. The space between the central projection 102 and the outer peripheral wall portion 103 is formed by a plug And an engaging recessed portion 104 to which the engaging protrusion 82 of the insulator 81 can engage.

Two types of receptacle contacts 106 and 112 are provided in the coupling recess 104 in parallel to the longitudinal direction of the receptacle insulator 101.

The receptacle contacts 106 and the receptacle contacts 112 are all integrally formed by stamping and are subjected to plating (for example, copper plating, copper plating, Is a member having elasticity and conductivity, which is produced by performing Sn (tin) -Cu (copper) plating (A) after the plating (for example, nickel plating) is performed. The middle portion of the ten receptacle contacts 106 is composed of an intermediate fixing portion 107 fixed to one side of the central projection 102. One end of the receptacle contact 106 is connected to the outside of the receptacle insulator 101 (Not shown). The other end of each of the receptacle contacts 106 is formed of a deformable contact portion 109 which is deformed into a curved shape and can be elastically deformed as shown in the figure.

A total of ten receptacle contacts 112 are symmetrical with respect to the receptacle contacts 106 and include an intermediate fixing portion 113 fixed to the other side surface of the central projection 102 and an intermediate fixing portion 113 projecting outward from the receptacle insulator 101 A stem portion 114, and a resiliently deformable deformation contact portion 115. [

10, the tail portion 108 of each receptacle contact 106 and the tail portion 114 of each receptacle contact 112 are soldered to a circuit pattern on the circuit board CB2.

14 and 15, the plug connector 80 and the receptacle connector 100 having the above-described structure are arranged such that the engaging protrusion 82 of the plug connector 80 is engaged with the engaging recess 104 of the receptacle connector 100 ). ≪ / RTI > 15, the deformation contact portions 109 of the receptacle contacts 106 of the receptacle connector 100 are resiliently deformed so that the corresponding plug contacts 80 The plug contacts 84 are brought into contact with the contact plane 93 of the corresponding plug contacts 84 while the deformable contacts 115 of the respective receptacle contacts 12 are elastically deformed, The circuit board CB1 and the circuit board CB2 are electrically connected to each other with the receptacle contacts 90 and the receptacle contacts 106 and 112 interposed therebetween.

In addition, while the plug connector 80 and the receptacle connector 100 maintain the engaged state, the contact pressure continues to act on the contact plane 87 at each of the strained contact portions 115, The contact pressure continues to be applied to the contact portion 93.

However, since the Sn-Cu plating A is not formed excessively thick on the contact portions 87b and 93b of the plug contacts 84 and 90 as described above, the Sn-Cu plating A applied to the contact portions 87b and 93b, Whiskers are generated in the Cu plating A and the whiskers reach the adjacent plug contacts 84 and 90 so that there is less possibility of contact with the adjacent plug contacts 84 and 90. [ Therefore, there is a low possibility that a short (short circuit) occurs between adjacent plug contacts 84 and 90 due to whiskers.

While the present invention has been described with reference to the two embodiments above, the present invention is not limited to the above-described embodiments, but can be carried out by various modifications.

For example, the connector 10 of the first embodiment is deformed by a backlock type connector, and the rotation center axis (a portion corresponding to the rotation center shaft 54) of the actuator is rotatably engaged with the surface of the contact A recessed portion for preventing plating interference (a recessed portion corresponding to the plating interposition preventing recessed portion 34b) may be formed on each of the support recessed portions after the support recessed portion (the recessed portion corresponding to the support recessed portion 34) is torn. When one of the front locking type and the back locking type is employed, the arrangement and quantity of the recess for preventing plating interference and the cross-sectional shape of the recess for preventing plating interference can be deformed with respect to the supporting recess.

17, the connector of the first embodiment is modified into a connector 10 'having a slide type actuator 63 (slider) (pressing member) instead of the rotary type actuator 50 It is also good. The connector 10 'includes a fixed arm 66 fixed to the insulator 64, a contact arm 67 capable of resilient deformation, a tail piece 68 soldered to the circuit pattern of the circuit board CB, And a signal contact 65 having the same. A plurality of signal contacts 65 are fixed to the insulator 64, not shown, in one direction (a direction orthogonal to the paper surface). Sn (tin) -Cu (copper) plating (A) is performed after forming the base by nickel plating on the entire surface of each signal contact 65.

The fixed arm 66 has a depressed portion 66a formed on a lower surface thereof and a depressed portion 66a on the lower surface of the fixed arm 66 has depressed portions 66b for preventing plating interference. The actuator 63 is inserted into the inner space of the insulator 64 and presses the pressing portion 63a of the FPC 60 against the pressing portion 66a of the fixing arm 66 of the signal contact 65, 17) for increasing the contact pressure between the FPC 60 and the contact arm 67 and a release position (not shown) pulled by the insulator 64 by pressing the contact 65 against the contact arm 67 side of the contact 65, Can be moved relative to each other.

The contact pressure continues to be applied to the pressured portion 66a of the signal contact 65 at the pressing portion 63a of the actuator 63 while the actuator 63 is positioned at the locked position. As described above, since the plating arm interference preventing recess 66b is formed in the fixed arm 66 of the signal contact 65, the signal contact 65 is formed in the same manner as the plug contacts 84 and 90 of the plug connector 80. [ Cu plating (A) on the part of the press-contacted portion 66a can be prevented from being formed excessively thick. Therefore, whiskers are generated in the Sn-Cu plating (A) applied to the pressed portion 66a, and the whiskers reach the adjacent signal contacts 65 and are less likely to come into contact with the adjacent signal contacts 65. [ Therefore, there is a low possibility that a short (short circuit) occurs between adjacent signal contacts 65 due to whiskers.

Also in the case of this modified example, the arrangement and quantity of the recess for preventing plating interference and the cross-sectional shape of the recess for preventing plating interference can be modified.

18, a so-called NON-ZIF type connector 10 " having no actuator (the structure is substantially the same as the connector 10 'except that the actuator 63 is not provided) ) Of the present invention.

When a memory card 120 (connection object) (a pressing member) is inserted into the connector 10 '', a terminal (not shown) provided on the lower surface of the memory card 120 is brought into contact with the contact arm 67, The pressing portion 12 formed on the upper surface of the memory card 120 presses the pressed portion 66a of the fixed arm 66 so that the contact pressure between the terminal of the memory card 120 and the contact arm 67 is increased. Therefore, the connector 10 '' has the same effect as the connector 10 '.

The connectors 10 and 10 'of the first embodiment can be connected to a thin plate-like connection object other than the FPC (for example, a Flxible Flat Cable ( FFC) can be connected. (For example, FPC or FFC) other than the memory card 120 may be inserted into the connector 10 ''.

In the connector 70 of the second embodiment, plating intervention preventing recessed portions 87a (corresponding to the contact portions 87b, 93b) of the receptacle contacts 106 93a may be used. Plating interference preventing recessed portions 87a and 93a are formed in the plug contacts 84 and 90 and contact portions 87b and 93b of the deformation contacting portions 109 and 115 of the receptacle contacts 106 and 112 are formed. Plating intervention preventing recessed portions 87a and 93a may be formed at the contact portion with the plating intervening portion 93a. The position, quantity, and cross-sectional shape of the plug contact 84 (90) and the receptacle contacts 106 (112) are not limited in the case where the recess for preventing plating interference is formed on one side.

Further, even in the case of one of the connectors, it is not necessarily limited to Sn (tin) -Cu (copper) plating if the plating to be performed on the surface of each contact contains Sn (tin).

10,10 '... connector 20 ... insulator
21 ... FPC insertion port 21a ... insertion recess
22 ... side wall 23 ... closed position holding recess
24 ... side recess 25 ... fixing metal
26 ... front end wall 27 ... rotation regulating portion
28 ... lower hollow 29 ... contact insertion hole
30 ... signal contact 31 ... contact arm
32 ... contact projection 33 ... pressing arm
34 ... supporting recess 34a ... blood pressing
34b ... Plating interference prevention spine 35 ... Tail piece
36 ... Boss projection 40 ... Fixing bracket
41 ... tail piece 42 ... press-
43 ... bearing projections 44 ... supporting projections
45 ... supporting surface 50 ... actuator (pressing member)
51 ... side arm arm 52 ... open position holding projection
53 ... through hole 54 ... rotation center axis
55 ... cam portion (pressurizing portion) 56 ... operating portion
57 ... contact portion 59 ... engaged portion
60 ... FPC (connection object) 61 ... fitting portion
63 ... actuator (slider) (pressing member) 64 ... insulator
65 ... signal contact 66 ... fixed arm
66a ... pressed portion 66b ... plating intervention preventing recessed portion
67 ... contact arm 68 ... tail piece
70 ... connector 80 ... plug connector (connector)
81 ... plug insulator 82 ... engaging projection
84 ... Plug contact 85 ... Tee part
86 ... tip contact 87 ... contact plane
87a ... recessed portion for preventing plating interference 87b ... contact portion
90 ... Plug contact 91 ... Tee part
92 ... tip contact 93 ... contact plane
93a ... Plating interference prevention part 93b ... Contact part
100 ... receptacle connector (connector) 101 ... receptacle insulator
102 ... central projection 103 ... outer peripheral annular wall portion
104 ... coupling recess 106 ... receptacle contact
107 ... intermediate fixing portion 108 ... taper portion
109 ... deformation contact portion 112 ... receptacle contact
113 ... Middle fixing part 114 ... Tee part
115 ... deformation contact
120 ... Memory card (connection object) (pressing member)
121 ... pressing portion
A ... Sn (tin) -Cu (copper) plating (surface layer plating) CB, CB1, CB2 ... Circuit board

Claims (5)

An insulator capable of attaching and detaching a connection object on a thin plate; a plurality of contacts provided in parallel in one direction on each insulator and brought into contact with the connection object inserted in each insulator, And a pressing portion that presses the to-be-pressed portion formed on the surface of the contact and increases the contact pressure between the connection object and the contact,
The urging member urges the urging member to move between a lock position for increasing the contact pressure between the connection object and the contact while pressing the to-be-urged portion formed on the surface of each contact, and a releasing position for not influencing the contact pressure, As the actuator,
Wherein the actuator is rotatably installed in the insulator,
Wherein a contact portion for allowing the pressing portion to be rotatably engaged is provided on a surface of the contact,
The surface plating layer formed on the surface of the contact by the heat of the reflow or the like together with the to-be-pressed portion is formed on the bottom surface of each supporting recess portion by excessive surface layer plating due to the surface plating that flows down when the surface layer plating is melted Wherein a recess for preventing plating interference is formed in which a surface plating flowing downward flows. delete delete delete delete

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