JP4054750B2 - Surface mount connector - Google Patents

Description

  The present invention relates to a surface mount connector that is surface-mounted on a printed circuit board. In particular, the present invention relates to an electrical conductor including a flat flexible cable such as an FPC (Flexible Printed Circuit) or FFC (Flexible Flat Cable) and a surface mount connector electrically connected to a contact of a mating electrical connector. In this specification, flat flexible cables are generically referred to as FPC.

  To connect electronic component modules and printed circuit boards mounted on recent electronic devices such as liquid crystal displays and mobile phones and portable information devices represented by PDA (Personal Digital Assistance), a flat flexible cable is used. An FPC is being used.

  FPC connectors that are surface-mounted on a printed circuit board are required to have a low mounting height (to reduce the height) in order to increase the mounting density, and there are many contacts arranged on this surface-mounted FPC connector. Pinning and narrowing are in progress.

  As such a surface mount type FPC connector, an insulating housing provided with an FPC insertion portion, and a plurality of contact terminals mounted side by side at a predetermined pitch on the insulating housing, the contact beam extending to the FPC insertion portion And a rotation actuator for applying a contact pressure necessary for electrical connection between the contact of the FPC inserted in the FPC insertion portion and the contact of the contact beam. A surface mount type FPC connector has been invented (see, for example, Patent Document 1).

In the surface mount type FPC connector described above, a non-contact terminal is rotatably installed adjacent to each of a plurality of contact terminals, and a biasing beam facing a contact beam of the contact terminal adjacent to the non-contact terminal. Since the biasing beam of the non-contact terminal is rotated toward the contact beam by the rotation of the rotation actuator, the surface mount type FPC connector having a structure that can be miniaturized is provided. Can be provided.
Japanese Patent Laid-Open No. 2003-151662

  However, in the surface mount type FPC connector 60 according to Patent Document 1 shown in FIG. 8, a plurality of contact terminals 90 are mounted side by side on the insulating housing 70 at a predetermined pitch. A contact 95 serving as a lead portion protrudes rearward of the insulating housing 70. The protruding contact 95 is soldered to a printed circuit board (not shown).

  FIG. 8 corresponds to FIG. 2 in Patent Document 1, and is a state diagram before the FPC is connected in the surface mount type FPC connector according to Patent Document 1, and is a cross-sectional view taken along the contact terminal. is there.

  For example, in an assembly process such as a liquid crystal display or PDP (Plasma Display Panel), a metal member may be fixed with a tapping screw. Then, the metal scrap generated at the time of fastening with the tapping screw is locked to the contact lead portion (corresponding to the contact 95 in FIG. 8) in the surface mount type FPC connector provided in the liquid crystal display or PDP. There is a problem that the contacts are short-circuited.

  In order to prevent such a short circuit between the contacts due to the falling or intrusion of the metal scrap, in particular, a short circuit between the lead portions of the contacts, in FIG. 8, a rotary actuator 80 (hereinafter, an opening / closing lever 80 serving as a back lock type cover). In addition, the extended opening / closing lever 80 is formed in an L-shape, and the contact 95 is covered with the L-shaped opening / closing lever 80, so that the metal opening / closing lever 80 is prevented from entering metal debris. Measures can be considered as protective covers to prevent.

  However, increasing the size of the opening / closing lever 80 serving as a cover as described above is contrary to a surface mount type FPC connector having a structure that can be downsized. In addition, the cover opening / closing lever 80 is not provided with a protective function, but is small (low profile) having a protective function that prevents the entry of metal debris into the surface mount connector itself regardless of the cover opening / closing lever 80. And inexpensive surface mount connectors are demanded.

  In such a surface mount connector, it is convenient if a surface mount connector with a metal dust protection function and a surface mount connector without a metal dust protection function can be provided so that the user can select. In other words, it is convenient if a protective function for metal scrap can be selected as an option for a surface mounting connector having specifications (for example, the number of poles) required by a user.

  Further, in the case of such a surface mount connector having a protective function against metal scraps, it must be considered that the lead portion of the contact has a structure that can be easily soldered to the printed circuit board. For example, it is convenient to make the structure that can be easily probed with a probe so that the continuity check can be performed on the soldered lead portion.

  In order to solve the above-described problems, an object of the present invention is to provide a small-sized (low-profile) and inexpensive surface-mounting connector having a protective function for preventing intrusion of metal scrap as an option.

  In order to satisfy the above-mentioned object, the inventor has invented a new surface mount connector as described below, which has a structure in which a protective cover for preventing intrusion of metal scraps can be attached to the housing.

  (1) It is provided with a plurality of contacts assembled in an insulating housing, and the plurality of contacts are electrically connected to the electrical conductor including the FPC inserted into the housing and the contact of the mating electrical connector, One or more of the plurality of contacts protrude from the side surface of the housing to form a lead portion, and the lead portion is a surface mount connector joined to a printed circuit board, and the lead portion protrudes. A protective wall is provided so as to cover the side surface of the housing, and a lower end portion of the protective wall has an insulating protective cover in which a notch groove is formed so as to surround the lead portion. A surface mount connector, wherein the cover is attachable to the housing.

  (2) The protective cover of the protective cover is provided with a predetermined interval from the side surface of the housing from which the lead portion protrudes, and the protective cover is formed so that the end surface of the lead portion slightly protrudes from the protective wall. The surface-mounting connector according to (1), which is attachable to the housing.

  (3) The notch groove of the protective wall in the protective cover is provided with a gap so as not to contact the lead portion, and the protective cover can be attached to the housing (1) or ( The surface mount connector according to any one of 2).

  (4) The protective cover includes a pair of protruding pins on both wings of the protective wall, and the housing has a pair of holes into which the pair of protruding pins are inserted on a side surface of the housing from which the lead portion protrudes. The surface mount according to any one of (1) to (3), wherein the surface mount is formed, the pair of protruding pins are press-fitted into the pair of holes, and the protective cover can be attached to the housing. Connector.

  (5) A pair of detents are provided so as to oppose both side surfaces of the protective cover, and the housing has a recess formed on a side surface of the housing from which the lead portion protrudes, and the protective cover is formed in the recess. A pair of inner walls that are in contact with both side surfaces are formed, a pair of indents are formed into which the pair of protruding pins are inserted so as to face the pair of inner walls, and the pair of indents The surface mounting connector according to any one of (1) to (3), wherein a detent is press-fitted and the protective cover can be attached to the housing.

  (6) The wings of the protective cover are provided with a pair of protrusions arranged in parallel with the protective wall, and the housing has a recess formed on a side surface of the housing from which the lead portion protrudes. And a pair of recesses into which the pair of protrusions are inserted into a pair of grooves communicating with the pair of inner walls. The surface mount connector according to any one of (1) to (3), wherein the pair of protrusions are press-fitted into the pair of recesses, and the protective cover can be attached to the housing.

  (7) The surface mount connector according to any one of (1) to (6), wherein the protective cover is integrally formed of polyphenylene sulfide.

  (8) The housing is provided with a lid that opens and closes on the FPC insertion side, the periphery of the rotation center of the lid constitutes a plate cam, and the contact is constituted by an upper arm and a lower arm. A bifurcated contact, wherein the upper arm is slidably coupled to the plate cam to maintain the closed state and the open state of the lid body, and when the lid body is closed, the lid body and the lower arm The surface mounting connector according to (1), wherein when the FPC is sandwiched and the lid is in an open state, a gap is provided between the lid and the lower arm so that the FPC can be inserted and removed.

  (9) The bifurcated contact is composed of a first bifurcated contact in which a lead portion projects in the FPC insertion direction and a second bifurcated contact in which a lead portion projects on the opposite side to the FPC insertion direction. The first bifurcated contact and the second bifurcated contact so that the upper arm and lower arm of the first bifurcated contact and the upper arm and lower arm of the second bifurcated contact face the insertion direction of the FPC. Are mounted on the housing alternately, and the surface mounting connector according to (8).

  According to the invention described in (1), “a plurality of contacts assembled in an insulative housing are provided, and the plurality of contacts include an electric conductor including an FPC inserted into the housing and a mating electric connector. A surface mount connector in which one or more of the plurality of contacts protrudes from a side surface of the housing to form a lead portion, and the lead portion is joined to a printed circuit board. An insulating protective cover is provided with a protective wall so as to cover the side surface of the housing from which the lead portion protrudes, and a lower end portion of the protective wall is formed with a notch groove so as to surround the lead portion. And the protective cover can be attached to the housing ".

  According to the invention described in (2), in the surface mounting connector according to (1), the protective wall in the protective cover is provided with a predetermined interval from the side surface of the housing from which the lead portion protrudes. The protective cover can be attached to the housing so that the end face of the portion protrudes slightly from the protective wall. "

  The connector according to the present invention includes a plurality of contacts assembled to an insulating housing, and the plurality of contacts are electrically connected to contacts of an electrical conductor including an FPC inserted into the housing and a counterpart electrical connector. One or more of the plurality of contacts connected may protrude from the side surface of the housing to form a lead portion, and the lead portion may be a surface mount connector joined to a printed circuit board.

  The surface mount connector according to the present invention may be electrically connected to a flat flexible cable such as FPC or FFC, or may be a rectangular plug or a rectangular receptacle mounted on a cable end including a flat cable. Further, the mating connector electrically connected to the surface mount connector according to the present invention may be a board-to-board connector, a so-called board-to-board connector. The mating connector may be a surface mount connector.

  Further, when the surface mounting connector according to the present invention is a multi-polar receptacle in which a shell type and a normal male contact are arranged, the mating connector is a shell type and a normal female contact is arranged. It may be a multipolar plug. When the surface mounting connector according to the present invention is a multipolar plug, the mating connector may be a multipolar receptacle. Note that the distinction between male contacts and female contacts is for convenience and does not depend on the form of the contacts.

  In a preferred embodiment, the insulating housing according to the present invention is formed in a substantially rectangular parallelepiped shape, and a plurality of contacts are assembled to the housing in a line perpendicular to the insertion direction of the FPC in one line or in a plurality of lines. It may be a type FPC connector. The plurality of contacts may be bifurcated contacts or tuning fork contacts.

  The bifurcated contact has an upper arm and a lower arm formed at one end, and the present invention may be an FPC connector in which the upper arm and the lower arm of the bifurcated contact sandwich and elastically contact the FPC. Alternatively, a surface mount type FPC connector in which only the lower arm elastically contacts the FPC may be used.

  The surface mount type FPC connector according to the present invention is a so-called ZIF (Zero) which requires almost no insertion / removal force when the FPC is inserted / removed by connecting the upper / lower arm of the bifurcated contact to the open / close lever serving as the cover of the housing. (Insertion Force) type connector.

  Further, the surface mount type FPC connector according to the present invention is a so-called NON-ZIF type connector that does not require a mechanism for bringing the FPC into contact with the contact, and holds the FPC only by the clamping force of the bifurcated contact contained in the housing. There may be.

  Further, on the side surface opposite to the FPC insertion direction, the plurality of contacts may protrude from the housing to form all lead portions, and the FPC insertion side surface and the side surface opposite to the FPC insertion direction are provided. A plurality of contacts may be arranged on the housing and assembled so that the lead portions protrude alternately.

  In the surface mount type FPC connector according to the preferred embodiment, the housing is provided with a lid that opens and closes on the insertion side of the FPC, and the periphery of the rotation center of the lid constitutes a plate cam. The contact is a bifurcated contact composed of an upper arm and a lower arm, and the upper arm is slidably coupled to the plate cam to maintain the closed state and the open state of the lid. When the lid is closed, the FPC is sandwiched between the lid and the lower arm, and when the lid is open, a gap is provided between the lid and the lower arm so that the FPC can be inserted and removed.

  In the surface mount type FPC connector according to the preferred embodiment described above, the bifurcated contact includes the first bifurcated contact in which the lead portion projects in the FPC insertion direction and the lead portion on the opposite side to the FPC insertion direction. Is constituted by a second bifurcated contact protruding. The first bifurcated contact and the second bifurcated contact are arranged on the housing so that the upper arm and the lower arm of the first bifurcated contact and the upper arm and the lower arm of the second bifurcated contact are opposed to the FPC insertion direction. They are assembled alternately in a row.

  In such a surface mounting connector, an optional insulating protective cover includes a rectangular thin protective wall so as to cover the side surface of the housing from which the lead portion protrudes. A protective wall is provided at a predetermined interval from the side surface of the housing from which the lead portion protrudes, and the protective cover is attached to the housing. Further, the protective cover is attached to the side surface of the housing from which the lead portion protrudes so that the end surface of the lead portion slightly protrudes from the protective wall.

  In such a surface mount connector with a protective cover, for example, metal dust generated during fastening with a tapping screw is prevented from dropping or intruding between the lead portions of the contact mounted on the surface mount connector. You can stop at the wall.

  Further, in the surface mounting connector with a protective cover according to the present invention, the protective wall is formed with a notch groove in a comb shape so as to surround the lead portion. The notch groove of the protective wall in the protective cover is provided with a gap so as not to contact the lead portion, and the protective cover can be attached to the housing. That is, the lead portion is configured not to conduct heat to the protective wall.

  This is useful when the surface mounting connector is surface mounted on a printed circuit board in an air reflow furnace. As is well known, in the surface mounting method using an air reflow furnace, cream solder is applied to a printed circuit board, and after temporarily mounting the component (in the present invention, a surface mounting connector), the cream solder is melted to fix the component. To do.

  In the present invention, since the lead portion is not in contact with the protective wall, the lead portion does not conduct heat to the protective wall when heating the lead portion in an air reflow furnace, so the lead portion is heated to a predetermined temperature within a certain time. Does not disturb. Furthermore, the effect that the hot air of the air reflow furnace circulates or flows in a slight gap between the lead portion and the protective wall can be expected.

  Furthermore, in the surface mounting connector with a protective cover according to the present invention, since the terminal end surface of the lead part slightly protrudes from the outer surface of the protective wall, the probe needle contacts the terminal end surface of the lead part, For example, a continuity check can be performed. Further, since the lead portion slightly protrudes from the protective wall, the lead portion can be inspected by image recognition.

  Further, in the surface mounting connector with a protective cover according to the present invention, a slight gap is formed at the lower end portion of the protective wall so as not to contact the mounting surface of the printed circuit board. The thermal welding of the lead part is not hindered. That is, the hot air of the air reflow furnace circulates or flows in the vicinity of the lead portion without being blocked by the protective wall.

  In a first preferred embodiment, the surface mounting connector with a protective cover according to the present invention is described as follows: “The protective cover includes a pair of protruding pins on both wings of the protective wall, and the lead portion protrudes from the housing. A pair of holes into which the pair of projecting pins are inserted is formed on the side surface of the housing, and the pair of projecting pins are press-fitted into the pair of holes so that the protective cover can be attached to the housing. '' This may be a feature.

  And in this suitable 1st embodiment, a pair of protrusion pin may be formed in a quadrangular pyramid, and may be formed in a cone. The pair of holes corresponding to the pair of protruding pins may be a square hole corresponding to the protruding pin of the quadrangular pyramid, or may be a round hole corresponding to the protruding pin of the cone. In the protective cover according to the first preferred embodiment, a pair of projecting pins are press-fitted into the side surface of the housing where the lead portion is formed.

  In a second preferred embodiment, the surface mounting connector with a protective cover according to the present invention includes a pair of detents so as to oppose both side surfaces of the protective cover, and the housing has the lead portion protruding. A concave portion is formed on a side surface of the housing, and a pair of inner walls are formed in the concave portion so as to contact both side surfaces of the protective cover, and the pair of projecting pins are inserted so as to face the pair of inner walls. The pair of indents are formed, the pair of detents are press-fitted into the pair of indents, and the protective cover can be attached to the housing.

  In the second preferred embodiment, the pair of detents may be wedge-shaped claws or spherical protrusions. The pair of indents corresponding to the pair of detents may be square holes corresponding to detents serving as wedge-shaped claws or round holes corresponding to detents serving as spherical protrusions. The protective cover according to the second preferred embodiment is press-fitted into the housing from a direction (above the housing) perpendicular to the side surface of the housing where the lead portion is formed.

  Furthermore, in a preferred third embodiment, the surface mount connector with a protective cover according to the present invention is provided with "a pair of protrusions arranged in parallel to the protective wall on both wings of the protective cover, A concave portion is formed on the side surface of the housing from which the lead portion protrudes, and a pair of inner walls are formed in the concave portion so as to contact opposite side surfaces of the protective cover. Further, the inner wall communicates with the pair of inner walls. A pair of recesses into which the pair of protrusions are inserted are formed in the pair of grooves, and the pair of protrusions are press-fitted into the pair of recesses, so that the protective cover can be attached to the housing. '' As good as

  In this preferred third embodiment, the pair of protrusions may be formed in a quadrangular pyramid or may be formed in a cone. The pair of holes corresponding to the pair of protrusions may be a square hole corresponding to the protrusion of the quadrangular pyramid, or may be a round hole corresponding to the protrusion of the cone. The protective cover according to the third preferred embodiment is press-fitted into the housing from a direction (above the housing) perpendicular to the side surface of the housing where the lead portion is formed.

  In a preferred embodiment, the protective cover may be integrally formed with polyphenylene sulfide (hereinafter abbreviated as PPS). This PPS is a typical engineering plastic that has heat resistance, rigidity, dimensional stability, chemical resistance, flame resistance, and electrical insulation, and is a composite that contains glass fiber, carbon fiber, etc. May be used.

  In a preferred embodiment, the housing may also be molded from PPS and may be molded from polybutylene terephthalate (hereinafter abbreviated as PBT). Since this PBT has a high melting point and crystallinity, and has a low water absorption and thermal expansion coefficient, it exhibits excellent dimensional stability. In addition, it has excellent electrical insulation, small change in electrical characteristics due to moisture absorption, and high dielectric breakdown voltage.

  In the surface mount connector according to the present invention, the optional insulating protective cover includes a rectangular thin protective wall so as to cover the side surface of the housing from which the lead portion protrudes. For example, when fastening with a tapping screw The generated metal scrap can be prevented by the protective wall from falling or entering between the lead portions of the contacts mounted on the surface mounting connector.

  Further, in the surface mounting connector with a protective cover according to the present invention, the surface mounting method using the air reflow device has a structure in which the notch groove in the protective cover does not contact the lead portion, so that the solder joint performance may be impaired. Absent. Further, since the lead portion slightly protrudes from the protective wall, the probe needle can be brought into contact with the end surface of the lead portion, and for example, continuity can be checked. Further, since the lead portion slightly protrudes from the protective wall, the lead portion can be inspected by image recognition.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the following description, the best mode will be described by exemplifying a surface mount type FPC connector as the surface mount connector according to the present invention.

  FIG. 1 is a perspective external view of a surface mount connector according to an embodiment of the present invention. In the embodiment of FIG. 1, reference numeral 1 is a housing, reference numerals 21 and 22 are bifurcated contacts, and reference numeral 3 is an FPC. Reference numeral 4 denotes a printed circuit board, and reference numeral 51 denotes a protective cover.

  In the embodiment of FIG. 1, the housing 1 is formed in an approximately rectangular parallelepiped with an insulating synthetic resin material. A plurality of bifurcated contacts 21 and 22 are alternately arranged in a row in the direction orthogonal to the insertion direction of the FPC 3 and assembled to the housing 1.

  In the surface mount connector (hereinafter abbreviated as “connector”) 10 in FIG. 1, the housing 1 is provided with a lid 11 that opens and closes on the insertion side of the FPC 3. When the FPC 3 is inserted into the connector 10 and the lid 11 is closed, the bifurcated contacts 21 and 22 and the FPC 3 are electrically connected.

  The bifurcated contact 22 protrudes from the housing 1 on the side surface opposite to the insertion direction of the FPC 3 to form a lead portion 22A. The lead portion 22A is soldered to a land pattern formed on the surface of the printed circuit board 4. The connector 10 is a surface mount type FPC connector joined to a printed circuit board.

  In FIG. 1, the insulating protective cover 51 includes a protective wall 51A so as to cover the surface of the housing 1 from which the lead portion 22A protrudes. A plurality of notch grooves 51B are formed in a comb-like shape at the lower end portion of the protective wall 51A so as to surround the lead portion 22A.

  The protective wall 51A of the protective cover 51 is provided with a predetermined distance from the surface of the housing 1 from which the lead portion 22A protrudes. The protective cover 51 is attached to the housing 1 so that the end surface of the lead portion 21A slightly protrudes from the surface opposite to the insertion direction of the FPC 3 in the protective wall 51A.

  Further, in the embodiment of FIG. 1, the bottom surface of the lower end portion of the protective wall 51 </ b> A in the protective cover 51 is provided with a slight gap so that the connector 10 does not contact the mounting surface of the printed circuit board 4 to be surface-mounted. A protective cover 51 is attached to the frame.

  Next, the structure of the connector 10 according to the present invention will be further described with reference to FIG. 2A is a front view of the connector 10, FIG. 2B is a plan view of the connector 10, and FIG. 2C is a right side view of the connector 10. Moreover, FIG.2 (d) is a top view of the connector 10, and makes the cross section the WW arrow part shown by Fig.2 (a).

  2 (e) is a cross-sectional view taken along the line XX shown in FIG. 2 (a), and FIG. 2 (f) is a cross-sectional view taken along the line YY shown in FIG. 2 (a). FIG. 2 (g) is a sectional view taken along the line ZZ shown in FIG. 2 (a).

  As shown in the embodiment of FIG. 2, a pair of rotating shafts 11 </ b> A are extended on both wings of the lid 11 so as to be opposed to each other. The pair of rotating shafts 11 </ b> A is rotatably supported by a pair of holding members 1 </ b> A and 1 </ b> B that are press-fitted into both blades of the housing 1.

  On the other hand, as best shown in FIG. 2E, the bifurcated contact 21 has a lead portion 21A protruding on the insertion direction side of the FPC 3 (see FIG. 1). The bifurcated contact 21 forms an upper arm 21B and a lower arm 21C so as to be parallel to the lead portion 21A.

  Similarly, as best shown in FIG. 2F, the bifurcated contact 22 has a lead portion 22A protruding on the opposite side to the insertion direction of the FPC 3 (see FIG. 1). The bifurcated contact 22 forms an upper arm 22B and a lower arm 22C on the side opposite to the lead portion 22A.

  As best shown in FIG. 2B, the bifurcated contact 21 and the bifurcated contact 22 are alternately arranged in a line so that the respective lead portions 21A and 22A are opposite to each other. Thus, by arranging the lead portions 21A and the lead portions 22A alternately, a multi-pin contact can be mounted on the printed circuit board at a narrow pitch.

  As best shown in FIGS. 2 (e) and 2 (f), the periphery of the rotation center of the lid 11 forms a plate cam, and the upper arms 21B and 22B are slidably coupled to the plate cam. Thus, the closed state and the open state of the lid body 11 are maintained.

  In FIG. 2, when the lid body 11 is in the closed state, the FPC 3 (see FIG. 1) is sandwiched between the lid body 11 and the lower arms 21C and 22C, and when the lid body 11 is in the open state, the lid body 11 and the lower arm 21C. And 22C are provided with a gap so that the FPC 3 can be inserted and removed.

  Next, the mounting structure of the connector 10 and the protective cover 51 according to the first embodiment of the present invention will be described with reference to the perspective exploded view of FIG.

  In the mounting structure according to the first embodiment of FIG. 3, the protective cover 51 includes a pair of projecting pins 51 </ b> C and 51 </ b> D formed of square pyramids so as to be orthogonal to the protective wall 51 on both wings of the protective wall 51.

  On the other hand, the housing 1 is formed with a pair of holes 1C and 1D, which are square holes into which the pair of protruding pins 51C and 51D are inserted, on the surface of the housing 1 from which the lead portion 22A protrudes.

  The pair of projecting pins 51C and 51D are press-fitted into the pair of holes 1C and 1D, and the protective cover 51 can be attached to the housing 1. In the first embodiment in FIG. 3, the protective cover 51 is press-fitted into the housing 1 from the rear of the housing 1.

  In the connector 10 shown in FIG. 3, the protective cover 51 may be an option. The connector 10 shown in FIG. 3 has a low profile and functions as a surface mount type FPC ZIF connector without the protective cover 51, except for the protective function against metal scrap. The state where the protective cover 51 is attached to the connector 10 is shown in the external view of FIG.

  In the connector 10 with the protective cover 51 shown in FIG. 1, the protective wall 51A prevents, for example, metal debris generated during fastening with a tapping screw from falling or entering between the lead portions 22A of the connector 10. it can.

  Further, in the connector 10 with the protective cover 51 shown in FIG. 1, the protective wall 51A has a notch groove 51B formed in a comb shape so as to surround the lead portion 22A. The lead portion 22A is configured not to contact the notch groove 51B formed in the protective wall 51A.

  In FIG. 1, since the lead portion 22A is not in contact with the protective wall 51A, the lead portion 22A does not conduct heat to the protective wall 51A when the lead portion 22A is heated in an air reflow furnace. It does not prevent the temperature from rising to a predetermined temperature. Furthermore, the effect that the hot air of the air reflow furnace circulates or flows in the gap between the lead portion 22A and the notch groove 51B can be expected.

  Further, in the connector 10 with the protective cover 51 shown in FIG. 1, the end surface of the lead portion 22A slightly protrudes from the outer surface of the protective wall 51A. For example, continuity check can be performed. Further, since the lead portion 22A slightly protrudes from the protective wall 51A, the lead portion 22A can be inspected by image recognition.

  Next, a mounting structure of the connector 10 and the protective cover 52 according to the second embodiment of the present invention will be described with reference to the perspective exploded view of FIG. In the description of the second embodiment in FIG. 4, the same reference numerals as those in FIG.

  In the mounting structure according to the second embodiment of FIG. 4, the protective cover 52 includes a pair of detents 52E and 52F so as to oppose each other on both sides facing each other. On the other hand, the housing 1 has a recess 12 formed on the surface of the housing 1 from which the lead portion 22A protrudes.

  In FIG. 4, a pair of inner walls is formed in the recess 12 so that both side surfaces of the protective cover 52 are in contact with each other, and a pair of indents 1E and 1F into which a pair of detents 52E and 52F are inserted so as to face the pair of inner walls. Is formed.

  The pair of detents 52E and 52F are press-fitted into the pair of indents 1E and 1F, so that the protective cover 52 can be attached to the housing 1. In the second embodiment shown in FIG. 4, the protective cover 52 is press-fitted into the housing 1 from a direction orthogonal to the side surface of the housing 1 where the lead portion 22 </ b> A is formed, that is, from above the housing 1.

  In the connector 10 shown in FIG. 4, the protective cover 52 may be an option. The connector 10 shown in FIG. 4 has a low profile and functions as a surface mount type FPC ZIF connector without the protective cover 52, except for the protective function against metal scraps.

  FIG. 5 is a state diagram in which the protective cover 52 according to the second embodiment is attached to the connector 10. 5A is a front view of the connector 10, FIG. 5B is a plan view of the connector 10, and FIG. 5C is a right side view of the connector 10.

  In the second embodiment of FIG. 5, the insulating protective cover 52 includes a protective wall 52A so as to cover the surface of the housing 1 from which the lead portion 22A protrudes. A plurality of notch grooves 52B are formed in a comb-like shape at the lower end portion of the protective wall 52A so as to surround the lead portion 22A.

  The protective wall 52A of the protective cover 52 is provided with a predetermined distance from the surface of the housing 1 from which the lead portion 22A protrudes. A protective cover 52 is attached to the housing 1 so that the end surface of the lead portion 21A slightly protrudes from the side surface opposite to the insertion direction of the FPC 3 (see FIG. 1) in the protective wall 52A.

  Further, in the second embodiment of FIG. 5, the bottom surface of the lower end portion of the protective wall 52A in the protective cover 52 is not thermally contacted with the mounting surface of the printed board 4 (see FIG. 1) on which the connector 10 is surface-mounted. The protective cover 52 is attached to the housing 1 with a slight gap.

  In the connector 10 with the protective cover 52 shown in FIG. 5, for example, the metal debris generated during fastening with a tapping screw is prevented by the protective wall 52 </ b> A from falling or entering between the lead portions 22 </ b> A of the connector 10. it can.

  Further, in the connector 10 with the protective cover 52 shown in FIG. 5, the protective wall 52A has a notch groove 52B formed in a comb shape so as to surround the lead portion 22A. The lead portion 22A is configured not to contact the notch groove 52B formed in the protective wall 52A.

  In FIG. 5, since the lead portion 22A is not in contact with the protective wall 52A, the lead portion 22A does not conduct heat to the protective wall 52A when the lead portion 22A is heated in an air reflow furnace. It does not prevent the temperature from rising to a predetermined temperature. Furthermore, the effect that the hot air of the air reflow furnace circulates or flows in a slight gap between the lead portion 22A and the notch groove 52B can be expected.

  Further, in the connector 10 with the protective cover 52 shown in FIG. 5, the end surface of the lead portion 22A slightly protrudes from the outer surface of the protective wall 52A. For example, continuity check can be performed. Further, since the lead portion 22A slightly protrudes from the protective wall 52A, the lead portion 22A can be inspected by image recognition.

  Next, the mounting structure of the connector 10 and the protective cover 53 according to the third embodiment of the present invention will be described with reference to the perspective exploded view of FIG. In the description of the third embodiment in FIG. 6, the same reference numerals as those in FIG.

  In the mounting structure according to the third embodiment of FIG. 6, a pair of protrusions 53G and 53H are provided on both wings of the protective cover 53 in parallel with the protective wall 53A. On the other hand, the housing 1 has a recess 13 formed on the surface of the housing 1 from which the lead portion 22A protrudes.

  In FIG. 6, a pair of inner walls where both side surfaces of the protective cover 53 are in contact with the recess 13 are formed, and a pair of recesses into which a pair of protrusions 53G and 53H are inserted into a pair of grooves communicating with the pair of inner walls. 1G and 1H are formed.

  The pair of protrusions 53G and 53H are press-fitted into the pair of recesses 1G and 1H, so that the protective cover 53 can be attached to the housing 1. In the third embodiment in FIG. 6, the protective cover 53 is press-fitted into the housing 1 from a direction orthogonal to the surface of the housing 1 where the lead portion 22 </ b> A is formed, that is, from above the housing 1.

  In the connector 10 shown in FIG. 6, a protective cover 53 may be an option. The connector 10 shown in FIG. 6 has a low profile and functions as a surface mount type FPC ZIF connector without the protective cover 53, except for the protective function of metal scrap.

  FIG. 7 is a state diagram in which the protective cover 53 according to the third embodiment is attached to the connector 10. 7A is a front view of the connector 10, FIG. 7B is a plan view of the connector 10, and FIG. 7C is a right side view of the connector 10.

  In the third embodiment of FIG. 7, the insulating protective cover 53 includes a protective wall 53A so as to cover the surface of the housing 1 from which the lead portion 22A protrudes. A plurality of cutout grooves 53B are formed in a comb-like shape at the lower end portion of the protective wall 53A so as to surround the lead portion 22A.

  The protective wall 53A in the protective cover 53 is provided with a predetermined distance from the surface of the housing 1 from which the lead portion 22A protrudes. The protective cover 53 is attached to the housing 1 so that the end surface of the lead portion 22A slightly protrudes from the surface opposite to the insertion direction of the FPC 3 (see FIG. 1) in the protective wall 53A.

  Further, in the third embodiment of FIG. 7, the bottom surface of the lower end portion of the protective wall 53A in the protective cover 53 is slightly so as not to contact the mounting surface of the printed board 4 (see FIG. 1) on which the connector 10 is surface mounted. The protective cover 53 is attached to the housing 1 with a gap.

  In the connector 10 with the protective cover 53 shown in FIG. 7, the protective wall 53A prevents, for example, metal debris generated during fastening with a tapping screw from falling or entering between the lead portions 22A of the connector 10. it can.

  Further, in the connector 10 with the protective cover 53 shown in FIG. 7, the protective wall 53A has a notch groove 53B formed in a comb-like shape so as to surround the lead portion 22A. The lead portion 22A is configured not to contact the notch groove 53B formed in the protective wall 53A.

  In FIG. 7, since the lead portion 22A is not in contact with the protective wall 53A, the lead portion 22A does not conduct heat to the protective wall 53A when the lead portion 22A is heated in an air reflow furnace. It does not prevent the temperature from rising to a predetermined temperature. Furthermore, the effect that the hot air of the air reflow furnace circulates or flows in a slight gap between the lead portion 22A and the notch groove 52B can be expected.

  Furthermore, in the connector 10 with the protective cover 53 shown in FIG. 7, the end surface of the lead portion 22A slightly protrudes from the outer surface of the protective wall 53A. For example, continuity check can be performed. Further, since the lead portion 22A slightly protrudes from the protective wall 53A, the lead portion 22A can be inspected by image recognition.

  In the present embodiment, the FPC connector has been described. However, implementation of the present invention is extremely effective as long as it is a surface mount type connector that is accommodated in a case and exposes a plurality of lead portions in the vicinity of the case. For example, the same effect can be obtained in a surface mount type board-to-board connector, a board-to-wire connector, or a connector in which a DIP type lead portion is exposed.

1 is a perspective external view of a surface mount connector according to an embodiment of the present invention. It is a block diagram of the connector for surface mounting by this invention. 1 is a perspective exploded view of a surface mount connector according to a first embodiment of the present invention; FIG. FIG. 6 is a perspective exploded view of a surface mount connector according to a second embodiment of the present invention. FIG. 6 is a state diagram in which the protective cover according to the second embodiment is attached to the surface mounting connector according to the present invention. FIG. 6 is a perspective exploded view of a surface mount connector according to a third embodiment of the present invention. FIG. 6 is a state diagram in which a protective cover according to a third embodiment is attached to a surface mount connector according to the present invention. It is a figure of the connector for surface mounting by a prior art, is a state figure before FPC is connected, and is sectional drawing shown along the contact terminal.

Explanation of symbols

1 Housing 1A / 1B Holding Member 1C / 1D Hole 1E / 1F Indent 1G / 1H Recess 3 FPC
4 Printed circuit board 10 Surface mount connector (connector)
11 Lid 11A Rotating shaft 12/13 Recessed part 21/22 Bifurcated contact 21A / 22A Lead part 21B / 22B Upper arm 21C / 22C Lower arm 51/52/53 Protective cover 51A / 52A / 53A Protective wall 51B / 52B / 53B Notch Groove 51C / 51D Protruding pin 52E / 52F Detent 53G / 53H Protrusion

Claims (9)

A plurality of contacts assembled in an insulating housing, and the plurality of contacts are electrically connected to contacts of an electrical conductor including an FPC and a mating electrical connector inserted into the housing; One or more of the contacts protrude from the side surface of the housing to form a lead portion, and the lead portion is a surface mount connector joined to a printed circuit board,
A protective wall is provided to cover the side surface of the housing from which the lead portion protrudes, and an insulating protective cover in which a notch groove is formed at the lower end portion of the protective wall so as to surround the lead portion. Have
A surface mounting connector, wherein the protective cover is attachable to the housing.   The protective cover of the protective cover is provided with a predetermined interval from the side surface of the housing from which the lead portion protrudes, and the protective cover is attached to the housing so that the end surface of the lead portion protrudes slightly from the protective wall. The surface-mounting connector according to claim 1, wherein the surface-mounting connector can be attached.   The cutout groove of the protective wall in the protective cover is provided with a gap so as not to contact the lead portion, and the protective cover can be attached to the housing. The surface mount connector described in 1.   The protective cover includes a pair of projecting pins on both wings of the protective wall, and the housing has a pair of holes into which the pair of projecting pins are inserted on a side surface of the housing from which the lead portion projects. The surface mounting connector according to claim 1, wherein the pair of projecting pins are press-fitted into the pair of holes, and the protective cover can be attached to the housing.   A pair of detents are provided so as to oppose both side surfaces of the protective cover, and the housing has a recess formed on a side surface of the housing from which the lead portion protrudes, and the both side surfaces of the protective cover are formed in the concave portion. A pair of inner walls is formed, and a pair of indents are formed into which the pair of projecting pins are inserted so as to face the pair of inner walls. The pair of detents are press-fitted into the pair of indents. The surface mount connector according to claim 1, wherein the protective cover is attachable to the housing.   Both wings of the protective cover are provided with a pair of protrusions arranged in parallel to the protective wall, and the housing has a recess formed on a side surface of the housing from which the lead portion protrudes, and the protective portion is formed in the recess. A pair of inner walls with which both opposite side surfaces of the cover contact is formed, and a pair of recesses into which the pair of protrusions are inserted are formed in a pair of grooves communicating with the pair of inner walls. The surface mount connector according to any one of claims 1 to 3, wherein the pair of protrusions are press-fitted into the recesses, and the protective cover can be attached to the housing.   The surface mounting connector according to claim 1, wherein the protective cover is integrally formed of polyphenylene sulfide.   The housing is provided with a lid that opens and closes on the insertion side of the FPC, the periphery of the rotation center of the lid constitutes a plate cam, and the contact is a bifurcated contact constituted by an upper arm and a lower arm The upper arm is slidably coupled to the plate cam to maintain the lid body in a closed state and an open state. When the lid body is in a closed state, the FPC is sandwiched between the lid body and the lower arm. 2. The surface mounting connector according to claim 1, wherein a gap is provided between the lid and the lower arm so that the FPC can be inserted and removed when the lid is open.   The bifurcated contact includes a first bifurcated contact in which a lead portion protrudes in the FPC insertion direction and a second bifurcated contact in which a lead portion projects on the opposite side to the FPC insertion direction. The first bifurcated contact and the second bifurcated contact are arranged in the housing such that the upper arm and the lower arm of the first bifurcated contact and the upper arm and the lower arm of the second bifurcated contact face the insertion direction of the FPC. 9. The surface mounting connector according to claim 8, wherein the surface mounting connector is assembled alternately.

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