JP2019029107A - Electric connector - Google Patents

Abstract

To provide an electric connector which is capable of preventing erroneous fitting and capable of smoothly fitting a plug connector and a receptacle connector without damaging a contact in the case of fitting and, in addition, improves a protective function of the plug connector.SOLUTION: A plug connector comprises an enclosure wall extending in a direction of withdrawal with a receptacle connector. The receptacle connector comprises a fitting projection 320 which can be fitted into the enclosure wall. In the enclosure wall, between opposite two long-side sidewalls 243 and 244, only on one sidewall 243, a recessed surface wall part 243b which is recessed through an inclined wall part 243a towards the other long-side sidewall 244 while leaving both ends adjacent to short-side sidewalls is formed. The fitting projection 320 is substantially rectangular in a cross-section orthogonal in the direction of withdrawal and only on one of opposite two long-side sidewall surfaces, a recessed surface part which is recessed through a slope towards the other long-side sidewall surfaces while leaving both ends adjacent to short-side sidewall surfaces is formed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electrical connector used for an electrical device, an electronic device, a communication device, and the like, which includes a plug connector and a receptacle connector that can be inserted and removed from each other. An object of the present invention is to propose an electrical connector having a structure that can be smoothly fitted without damaging the contacts.

  An electrical connector consists of a plug connector and a receptacle connector. One connector is mounted on a board, the other connector is mounted on another board, and the mounting surfaces of both boards are opposed to each other. Some boards are connected by fitting them together.

  FIG. 13 (a) shows a conventional electrical connector of this type, which is composed of a plug connector 1 and a receptacle connector 4 that are detachably fitted to each other. The plug contact 3 is composed of a base 10 made of an electrically insulating material and holding the required number of plug contacts 3 in the insertion / extraction direction, and a plug shell 2 that collectively surrounds and protects the plug contacts 3. . On the other hand, the receptacle connector 4 includes a required number of receptacle contacts, a block portion 50 made of an electrically insulating material and holding the required number of receptacle contacts and fitted in a plug shell, and a base portion 40 holding the block portion 50. It consists of and.

  In the electrical connector shown in FIG. 13A, the fitting portion between the plug connector 1 and the receptacle connector 4 is for the purpose of preventing erroneous fitting (fitting in the wrong direction) between the plug connector 1 and the receptacle connector 4. As a whole, it is formed in a trapezoidal shape in plan view. In order to fit the plug connector 1 and the receptacle connector 4 in this electrical connector, the block portion 50 of the receptacle connector 4 may be fitted into the plug shell 2 of the plug connector 1. However, since the block portion 50 is formed smaller than the plug shell 2, the block portion 50 can be inserted into the plug shell 2 from an oblique direction as shown in FIG. Thus, when it inserts from the diagonal direction, the block part 50 might contact the plug contact 3, and the malfunction that the plug contact 3 bends might arise.

  In view of this problem, Patent Document 1 proposes an electrical connector that prevents damage to a mating contact even if the block portion is inserted obliquely.

  In this electrical connector, the block portion of the socket-side connector is formed into a substantially square block portion, and tensions having different left and right thicknesses are provided on the left and right sides of the longitudinal end of the block portion, and the enclosure of the plug-side connector is The length is adapted to the thickness dimension of the tension provided at both ends of the part.

Japanese Utility Model Publication No. 5-69873

  However, in the conventional electrical connector proposed in Patent Document 1, the enclosure of the plug-side connector is formed only on the side of the plug contact, and both ends in the longitudinal direction are open. The protection function was insufficient and the strength of the enclosure was weak. Also, since the tension provided on the block part of the socket-side connector protrudes at a right angle, the socket side connector is prevented from being inserted diagonally by the contact between the tension and the enclosure, so that the socket is brought to the proper mating position. When the side connector is slid in the longitudinal direction, the socket side connector suddenly fits into the plug side connector when it reaches the proper position, and there is a risk that the connector may be damaged by the impact at that time.

  The present invention solves the above-mentioned problems of the prior art, can prevent erroneous mating, and when mating a plug connector and a receptacle connector, it can be smoothly mated without damaging the contacts. An object is to provide an electrical connector having a high protection function.

  The present invention is an electrical connector including a plug connector and a receptacle connector that are detachably fitted to each other. In order to achieve the above object, the plug connector includes a required number of plug contacts and insertion / extraction of the receptacle connector. A receptacle wall extending in a direction and collectively enclosing the required number of plug contacts, wherein the receptacle connector is in contact with the plug contacts when the plug connector and the receptacle connector are inter-fitted with each other. A contact and a fitting projection that holds the required number of receptacle contacts and can be fitted in the enclosure wall of the plug connector, and the enclosure wall of the plug connector has a cross section perpendicular to the insertion / extraction direction Two long side walls facing each other and two short side walls facing each other, A concave wall portion recessed through an inclined wall portion toward the other long side wall, leaving both ends adjacent to the short side wall only on one of the two long side walls facing each other. The fitting convex portion of the receptacle connector is formed in a substantially rectangular cross section perpendicular to the insertion / extraction direction, and has two short side wall surfaces facing each other and two long side wall surfaces facing each other. The long side wall side that faces the long side wall in which the concave wall portion is formed when the plug connector and the receptacle connector are fitted together, of the two opposing long side wall surfaces Only the wall surface is formed with a concave portion that is recessed through an inclined surface toward the other long side wall surface while leaving both ends adjacent to the short side wall surface.

  In the electrical connector according to the present invention, when the receptacle connector is inserted into the top surface of the fitting convex portion from an oblique direction with respect to the plug connector, the concave wall portion and the other side It is preferable to have a guide projection that enters between the long side wall and guides the receptacle connector to the normal fitting start position.

  Moreover, in the electrical connector of this invention, it is preferable that the said guide protrusion each has the slope which makes a taper shape in the width direction both ends by making the direction along the said short side wall surface into the width direction.

  Further, in the electrical connector of the present invention, the fitting convex portion surrounds the side surface of the electrically insulating block portion that holds the receptacle contact and the block portion, and the long side wall surface and the short side surface. It is preferable to have a conductive receptacle shell constituting the side wall surface.

  In the electrical connector of the present invention, when the receptacle connector is to be inserted obliquely when connected to the plug connector, the fitting convex portion of the receptacle connector is located at the upper end of the portion of the enclosure wall that is reduced in width by the concave wall portion. Since the contact into the enclosure wall is restricted by contact, bending or breakage of the plug contact due to the oblique insertion of the receptacle connector is prevented. In addition, since the enclosure wall of the plug connector has a closed cross-sectional shape, it has a high strength and can ensure a sufficient protection function of the plug contact. Furthermore, since the concave wall portion is formed on only one of the opposing two long side walls of the enclosure wall, the left and right asymmetric shapes can be obtained, and erroneous fitting between the plug connector and the receptacle connector can be prevented. . In addition, since the inclined wall portion is provided between the longitudinal end portion of the enclosure wall and the concave wall portion, when the receptacle connector is slid to the normal fitting start position, the fitting convex portion suddenly hits the enclosure wall. And the receptacle connector can be smoothly fitted into the plug connector.

  Therefore, according to the present invention, it is possible to prevent erroneous mating, and when mating the plug connector and the receptacle connector, the mating can be smoothly performed without damaging the contacts, and in addition, the electrical connector having a high plug contact protection function. Can be provided.

FIG. 1 shows an electrical connector according to an embodiment of the present invention including a plug connector according to an embodiment of the present invention and a receptacle connector according to an embodiment of the present invention in a non-fitted state (before or after insertion) of the plug connector and the receptacle connector. It is the perspective view shown in the state after extraction. FIG. 2 is a perspective view showing the electrical connector of FIG. 1 from different angles. 3 is a perspective view showing a base in the plug connector shown in FIGS. 1 and 2, wherein (a) shows the side opposite to the board mounting surface, and (b) shows the board mounting surface side. 4 is a perspective view showing a plug shell and a plug shell mounting flange in the plug connector shown in FIGS. 1 and 2, wherein (a) shows the side opposite to the board mounting surface, and (b) shows the board mounting surface. Shows the side. FIG. 5 is a perspective view showing three types of plug contacts having different lengths provided on the plug connector of FIGS. 6 shows the plug connector of FIGS. 1 and 2 as a single unit, (a) is a plan view, (b) is a cross-sectional view taken along line AA in FIG. FIG. 6B is a sectional view taken along line BB in FIG. FIG. 7 is a perspective view showing a housing in the receptacle connector shown in FIGS. 1 and 2, wherein (a) shows the side opposite to the board mounting surface, and (b) shows the board mounting surface side. 8 is a perspective view showing a receptacle shell and a mounting flange in the receptacle connector shown in FIGS. 1 and 2, wherein (a) shows the side opposite to the board mounting surface, and (b) shows the board mounting surface side. Show. FIG. 9 is a perspective view showing a receptacle contact provided in the receptacle connector of FIGS. 10 shows the receptacle connector of FIGS. 1 and 2 alone, (a) is a plan view, (b) is a cross-sectional view taken along the line CC in FIG. 10 (a), (c) is sectional drawing which follows the DD line in Fig.10 (a), (d) is sectional drawing which follows the EE line in Fig.10 (a). 11 is a view showing a state in which the receptacle connector is inserted into the plug connector from an oblique direction in the electrical connector shown in FIGS. 1 and 2, (a) is a perspective view, and (b). Is a side view. FIGS. 12A and 12B are views showing a state in which the plug connector and the receptacle connector are fitted and connected in the electrical connector shown in FIGS. 1 and 2, wherein FIG. 12A is a side view, and FIG. 12B is a rear view. (C) is a cross-sectional view taken along the line FF in FIG. 12 (b). The conventional electrical connector which consists of a plug connector and a receptacle connector which can be inserted and extracted mutually is shown, (a) is a perspective view which shows the state before a fitting, (b) is a receptacle connector with respect to a plug connector It is the side view which showed a mode that it was going to insert from the diagonal direction, partially showing in cross section.

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

  As shown in FIGS. 1 and 2, the electrical connector 100 of the present embodiment includes a plug connector 200 and a receptacle connector 300 that are detachably fitted to each other. In use, the plug connector 200 is mounted on a board (not shown), the receptacle connector 300 is mounted on another board (not shown), and the plug connector 200 and the receptacle connector 300 are connected to each other with the boards facing each other. These substrates can be electrically connected.

  In the following description, for convenience, the side of the plug connector 200 and the receptacle connector 300 that are mounted on the board is referred to as the first side or the lower side, and the opposite side is referred to as the second side or the upper side. That is, FIG. 1 shows the first side or bottom surface of the receptacle connector 300, and shows the second side or top surface of the plug connector 200, and FIG. 2 shows the second side or top surface of the receptacle connector 300. The first side or bottom surface of the plug connector 200 is shown.

  As shown in FIGS. 1 and 2, the plug connector 200 mainly includes a required number of plug contacts 210 and a required number of plug contacts 210 along the insertion / extraction direction (direction indicated by an arrow X in FIGS. 1 and 2). An electrically insulative base 220 to be held, a plug shell 240 as an enclosure wall standing on the base 220 in the insertion / extraction direction and collectively enclosing a required number of plug contacts 210, and a plug shell mounting flange 260; It is composed of

  The base 220 is a member made of an electrically insulating synthetic resin, and is formed by injection molding or the like. Examples of the material of the base 220 include, but are not limited to, a liquid crystal polymer, polyphenylene sulfide, polybutylene terephthalate, and polyamide.

  As shown in FIG. 3, the base 220 is formed in a flat and substantially rectangular parallelepiped shape, and has an outer shape similar to the cross-sectional shape of the plug shell 240 at an intermediate portion between the end portions in the longitudinal direction. A step portion 221 is formed to be fitted into the base end portion of 240. At both ends in the longitudinal direction of the step portion 221, a receiving groove is formed at a position corresponding to a guide projection 337, which will be described later, of the receptacle connector 300 at a final fitting position between the connectors (see FIG. 12). 222 are formed. The height of the stepped portion 221 is set to a dimension that makes contact with the upper surface (protruding end surface) of a fitting convex portion 320 (to be described later) of the receptacle connector 300 at the final fitting position. Further, the base 220 is formed with a required number of insertion holes 223 that penetrate vertically through the intermediate portion between the receiving grooves 222 when viewed in the longitudinal direction and into which the plug contact 210 is inserted and held. In the illustrated example, a total of 26 insertion holes 223 of 2 horizontal rows × 13 vertical rows are formed, but the arrangement and number of the insertion holes 223 are not limited to the illustrated example.

  In the illustrated example, a locking claw 225 that locks the plug shell mounting flange 260 is formed on a side surface (long side surface) 224 that extends in the longitudinal direction of the base 220. In addition, the upper surface 226 of the longitudinal end portion of the base 220 accommodates a fixture 250 (see FIG. 1) that fixes a housing wall surface of, for example, an electric device, electronic device, or communication device and the upper surface side of the plug connector 200. A fixing member receiving groove 227 is formed. A wide through hole 228 having a substantially T-shaped vertical cross section and a narrow through hole 229 that is connected to the wide through hole 228 and has a smaller width than the wide through hole 228 are formed at the longitudinal end of the base 220. Yes. Further, as shown in FIG. 3B, positioning pins 230 and 231 having different sizes (diameters) and / or shapes are formed on the lower surfaces of both ends of the base 220 in the longitudinal direction. By forming holes corresponding to the positioning pins 230 and 231 in the board on which the plug connector 200 is mounted, the plug connector 200 can be mounted on the board in the correct orientation and position.

  FIG. 4 shows the plug shell 240 and the plug shell mounting flange 260 in the plug connector 200 shown in FIGS. In the present embodiment, the plug shell 240 and the plug shell mounting flange 260 are made of a conductive metal and are integrally formed by pressing or the like.

  The plug shell 240 is formed to a height exceeding the plug contact 210 perpendicular to the upper surface of the base 220. The plug shell 240 is substantially rectangular in cross section perpendicular to the insertion / extraction direction X, has two short side walls 241 and 242 facing each other, and two long side walls 243 and 244 facing each other, and has a fitting port. H.245 is formed. Only one of the two long side walls 243 and 244 facing each other is recessed through the inclined wall 243a toward the other long side wall 244 leaving both ends adjacent to the short side walls 241 and 242. A concave wall portion 243b is formed. Accordingly, wide end portions 246 having relatively large distances between the opposing long side walls 243 and 244 are formed at both longitudinal end portions of the plug shell 240, and intermediate portions between both longitudinal end portions of the plug shell 240 are formed. Is formed with a reduced width portion 247 in which the distance between the opposing long side walls 243 and 244 is relatively small.

  The plug shell mounting flange 260 extends along the upper surface of the base 220 and supports the plug shell 240 in an upright state. The plug shell mounting flange 260 is suspended from the side edge of the flat wall 261 and is engaged with the long side surface 224 of the base 220. A hanging wall 262 that is locked by a pawl 225, and an opening 263 through which the fixture 250 passes, a slit 264 corresponding to the wide through hole 228 of the base 220, at the longitudinal end of the flat wall 261, An elastic tongue piece 265 is formed by cutting and raising a part of the flat wall 261 downward and inserting it into the narrow through hole 229 of the base 220.

  FIG. 5 shows a plurality of types of plug contacts 210 provided in the plug connector 200 of FIGS. 1 and 2 having different lengths, that is, three types (long L1, middle L2, short L3) in the illustrated example. Each plug contact 210 is made of a conductive metal such as copper, and a contact portion 211 that comes into contact with a receptacle contact that is a mating contact, a holding portion 212 that is held in the insertion hole 223 of the base 220, and solder etc. And a connection portion 213 to be connected. The holding part 212 has a larger width than the connection part 213 and the contact part 211 and is press-fitted and held in the insertion hole 223.

  6 shows the plug connector 200 of FIGS. 1 and 2 as a single unit, (a) is a plan view, (b) is a cross-sectional view taken along line AA in FIG. 6 (a), (B) is sectional drawing which follows the BB line in Fig.6 (a).

  From FIG. 6B and FIG. 6C, it can be confirmed that the stepped portion 221 of the base 220 is fitted into the proximal end portion of the plug shell 240. Further, as shown in FIG. 6B, the longest L1 plug contact 210 is arranged in the center in the longitudinal direction, and the shortest L3 plug contact 210 is arranged on the end side in the longitudinal direction, and has an intermediate length L2. The plug contact 210 is disposed between the longest L1 plug contact 210 and the shortest L3 plug contact 210.

  Further, as shown in FIGS. 6A and 6B, a grounding piece 252 is inserted into the slit 264 of the plug shell mounting flange 260 and the wide through hole 228 of the base 220 from above, and the wide through hole 228 is inserted. It is retained inside. The grounding piece 252 is in elastic contact with the elastic tongue 265 cut downward from the flat wall 261 of the plug shell mounting flange 260, and the lower end of the grounding piece 252 protruding from the lower surface of the base 220 is provided. The plug shell 240 can be grounded by connecting to the ground circuit of the substrate with solder or the like.

  Next, the receptacle connector 300 will be described. As shown in FIGS. 1 and 2, the receptacle connector 300 mainly includes a required number of receptacle contacts 310 (the same number as the plug contacts 210), and the required number of receptacle contacts 310 in the insertion / removal direction (arrow X in FIGS. 1 and 2). And a fitting convex portion 320 that has a shape corresponding to the plug shell 240 of the plug connector 200 and is fitted into the plug shell 240.

  In the present embodiment, the fitting convex portion 320 includes an electrically insulating block portion 330 that holds the receptacle contact 310, and a receptacle shell 340 that covers the side surface of the block portion 330. FIG. The housing 350 in which the part 330 is formed is shown. 7A shows the opposite side (upper surface side) of the housing 350 from the board mounting surface, and FIG. 7B shows the board mounting surface side (lower surface side) of the housing 350.

  The housing 350 is a member made of an electrically insulating synthetic resin, and a block portion 330 and a base portion 360 that supports the block portion 330 are integrally formed by injection molding or the like. Examples of the material of the housing 350 include, but are not limited to, liquid crystal polymer, polyphenylene sulfide, polybutylene terephthalate, and polyamide.

  The block portion 330 is formed in a substantially rectangular parallelepiped shape, and its side surface is configured by two short side wall surfaces 331 and 332 facing each other and two long side wall surfaces 333 and 334 facing each other. A concave surface portion 333b is formed on one 333 of the two long side wall surfaces 333 and 334 through an inclined surface 333a toward the other long side wall surface 334, leaving both ends in the longitudinal direction. Therefore, the block portion 330 has the widened portion 335 at both ends in the longitudinal direction, and the reduced width portion 336 at an intermediate portion between the both ends in the longitudinal direction.

  Further, the upper surface of the both ends in the longitudinal direction which is the widened portion 335 of the block portion 330 (the surface facing the upper surface of the stepped portion 221 of the plug connector 200 in the final fitting state of the plug connector 200 and the receptacle connector 300) is short side Two guide projections 337 are formed along the line. Each guide projection 337 is formed with a slope 337 a having a taper shape at both ends in the width direction with the direction along the short side of the block portion 330 as the width direction, and a slope 337 b on the side facing the longitudinal direction of the block portion 330. Is formed. Therefore, the guide protrusion 337 is formed in a substantially rectangular cone shape or a substantially truncated cone shape. The width of the guide protrusion 337 is slightly smaller than the inner method of the reduced width portion 247 of the plug shell 240.

  The base part 360 of the housing 350 is formed in a flat and substantially rectangular parallelepiped. A locking claw 362 for locking a later-described receptacle shell mounting flange 380 is formed on a side surface 361 (long side surface) extending in the longitudinal direction of the base portion 360. A wide through hole 363 having a substantially T-shaped vertical cross section and a narrow through hole 364 connected to the wide through hole 363 and having a smaller width than the wide through hole 363 are formed at the longitudinal end of the base portion 360. ing. Further, positioning pins 366 and 367 having different sizes (diameters) and / or shapes are formed on the lower surfaces of both ends in the longitudinal direction of the base portion 360. By forming holes corresponding to the positioning pins 366 and 367 in the board on which the receptacle connector 300 is mounted, the receptacle connector 300 can be mounted on the board in the correct orientation and position.

  Between the both ends in the longitudinal direction of the housing 350, a required number of insertion holes 351 are formed so as to penetrate the block portion 330 and the base portion 360 in the vertical direction, and to receive and hold the receptacle contacts 310 respectively. In the illustrated example, a total of 26 insertion holes 351 of 2 horizontal rows × 13 vertical rows are formed, but the arrangement and number of the insertion holes 351 are not limited to the illustrated example.

  FIG. 8 shows a receptacle shell 340 and a receptacle shell mounting flange 380 that are fixed on the housing 350. In the present embodiment, the receptacle shell 340 and the receptacle shell mounting flange 380 are made of a conductive metal and are integrally formed by pressing or the like.

  The receptacle shell 340 rises from the receptacle shell mounting flange 380 and surrounds the entire circumference of the block portion 330 of the housing 350 in a close contact state. The receptacle shell 340 has two short side wall surfaces 341 and 342 that are substantially rectangular in cross section perpendicular to the insertion / extraction direction X, and two long side wall surfaces 343 and 344 that face each other. One of the two long side wall surfaces 343 and 344 facing each other is provided with an inclined surface 343a toward the other long side wall surface 344 except for both ends adjacent to the short side wall surfaces 341 and 342. A recessed surface portion 343b that is recessed through is formed. In this embodiment, since the block portion 330 is covered with the receptacle shell 340 to form the fitting convex portion 320 (see FIGS. 1 and 2), the long side wall surfaces 343 and 344 of the receptacle shell 340 are fitted. The long side wall surface of the convex portion 320 is configured, and the short side wall surfaces 341 and 342 of the receptacle shell 340 configure the short side wall surface of the fitting convex portion 320, but the receptacle shell 340 is not provided. In the modification, the long side wall surfaces 333 and 334 of the block portion 330 constitute the long side wall surface of the fitting convex portion 320, and the short side wall surfaces 331 and 332 of the block portion 330 are the fitting convex portion 320. The side wall surface of the short side is formed.

  In this way, the widened portion 322 having a relatively wide width is formed at the longitudinal end portion of the fitting convex portion 320, and the intermediate portion between both longitudinal ends of the fitting convex portion 320 is relatively A narrow portion 323 having a narrow width is formed (see FIG. 1). The width of the widened portion 322 of the fitting convex portion 320 is larger than the width (inner method) of the reduced width portion 247 of the plug shell 240 and slightly smaller than the width (inner method) of the widened portion 246 of the plug shell 240. The widened portion 322 of the fitting convex portion 320 is restricted from entering the reduced width portion 247 of the plug shell 240 and can be inserted only into the widened portion 246 of the plug shell 240.

  Returning to FIG. 8, the receptacle shell mounting flange 380 extends along the upper surface of the base portion 360 to support the receptacle shell 340 in an upright state, and hangs down from the side edge of the flat portion 381. It comprises a hanging portion 382 that is locked to the long side surface 361 by a locking claw 362, and a flat hole 381 that has a horizontal hole 384 corresponding to the wide through-hole 363 of the base portion 360 at both ends in the longitudinal direction of the flat portion 381. An elastic tongue piece 385 that is formed by cutting and raising a part of the portion 381 downward and being inserted into the narrow-width through hole 364 of the base portion 360 is formed.

  FIG. 9 shows a receptacle contact 310 provided on the receptacle connector 300 of FIGS. Receptacle contact 310 is made of a conductive metal such as copper, has a bifurcated shape, receives contact portion 311 that receives and contacts contact portion 211 of plug contact 210, holding portion 312 that is held in insertion hole 351 of housing 350, and And a connection portion 313 connected to the substrate using solder or the like. The holding portion 312 has a larger width than the contact portion 311 and is press-fitted and held in the insertion hole 351.

  10 shows the receptacle connector 300 of FIGS. 1 and 2 as a single unit, (a) is a plan view, and (b) is a cross-sectional view taken along the line CC in FIG. 10 (a). (C) is sectional drawing which follows the DD line in Fig.10 (a), (d) is sectional drawing which follows the EE line in Fig.10 (a).

  10B and 10C, it can be confirmed that the receptacle shell 340 covers the side surface of the block portion 330 of the housing 350. FIG. Further, as shown in FIG. 6C, the receptacle contact 310 is press-fitted into the insertion hole 351 of the housing 350.

  10A, 10B, and 10D, a grounding piece 388 is inserted into the lateral hole 384 of the receptacle shell mounting flange 380 and the wide through hole 363 of the base portion 360 of the housing 350 from above. The retaining hole is held in the wide through hole 363. The grounding piece 388 is in elastic contact with the elastic tongue piece 385 cut and raised downward from the flat portion 381 of the receptacle shell mounting flange 380, and the lower end portion of the grounding piece 388 protruding from the lower surface of the base portion 360. Is connected to the ground circuit of the substrate using solder or the like, the receptacle shell 340 can be grounded.

  In order to electrically connect two substrates (not shown) using the electrical connector 100 configured in this manner, first, the plug connector 200 is disposed on one substrate in a positioning state by the positioning pins 230 and 231, and the plug The connection portion 213 of the contact 210 is connected to the circuit of the substrate using solder or the like, and similarly, the receptacle connector 300 is disposed on the other substrate in a positioning state by positioning pins 366 and 367, and the connection portion of the receptacle contact 310 is connected. 313 is connected to the circuit of the substrate using solder or the like. Then, as shown in FIG. 11, for example, the other board on which the receptacle connector 300 is mounted faces the one board, and the receptacle connector 300 is inserted into the fitting port 245 of the plug connector 200 mounted on the one board. The fitting convex part 320 is inserted. At this time, as shown in FIG. 11, when the receptacle connector 300 is to be inserted obliquely with respect to the plug connector 200, the widened portion 322 of the fitting convex portion 320 of the receptacle connector 300 is compressed by the plug shell 240 of the plug connector 200. Since the entry into the reduced width portion 247 is restricted by contacting the upper end of the width portion 247, the plug contact 210 is prevented from being bent or damaged by the oblique insertion of the receptacle connector 300.

  FIG. 12 shows a state where the plug connector and the receptacle connector are fitted and connected, (a) is a side view, (b) is a rear view, and (c) is FIG. 12 (b). It is sectional drawing along the FF line in it. In particular, from FIG. 12C, the guide protrusion 337 of the receptacle connector 300 is received in the receiving groove 222 of the step portion 221 of the plug connector 200, and the protruding end surface of the block portion 330 is in contact with the upper surface of the step portion 221. Can be confirmed.

  Further, according to the electrical connector 100 of the present embodiment, the plug shell 240 of the plug connector 200 has a closed cross-sectional shape, so that the strength is high and a sufficient protection function of the plug contact 210 can be ensured. Furthermore, the plug shell 240 is formed of a conductive metal, and connected to the ground circuit of the substrate with solder or the like to be grounded, whereby a shielding effect can be obtained.

  Furthermore, according to the electrical connector 100 of the present embodiment, when the widened portion 246 and the reduced width portion 247 are formed in the plug shell 240 of the plug connector 200, the two long side walls 243 and 244 facing each other of the plug shell 240 are formed. Of these, the concave wall portion 243b is formed only on one side 243, and when the widened portion 322 and the reduced width portion 323 are formed on the fitting convex portion 320 of the receptacle connector 300, the long sides of the two opposing faces of the fitting convex portion 320 are formed. Since the concave surface portion 343b is formed only on one side 343 of the side wall surfaces 343 and 344, the left and right asymmetric shapes can be obtained, and erroneous fitting between the plug connector 200 and the receptacle connector 300 can be prevented.

  Furthermore, according to the electrical connector 100 of the present embodiment, the inclined wall portion 243a that gradually increases the shell width is provided between the widened portion 246 and the reduced width portion 247 of the plug shell 240 of the plug connector 200. 11, from the relative positional relationship between the plug connector 200 and the receptacle connector 300, the receptacle connector 300 is placed in a proper mating start position (the widened portion 246 of the plug shell 240 and the widened portion 322 of the fitting convex portion 320 coincide with each other. ), The widened portion 322 of the fitting convex portion 320 can be prevented from suddenly fitting into the widened portion 246 of the plug shell 240, and the receptacle connector 300 can be smoothly fitted into the plug connector 200. Can be combined.

  Furthermore, according to the electrical connector 100 of the present embodiment, since the guide protrusion 337 is provided at the longitudinal end portion of the protruding end surface of the fitting convex portion 320, the plug connector 200 and the receptacle connector 300 as shown in FIG. Due to the positional relationship, when the receptacle connector 300 is slid to the normal fitting start position, the guide projection 337 can be inserted into the reduced width portion 247 of the plug shell 240 to guide the receptacle connector 300. The plug connector 200 can be more smoothly fitted.

  Furthermore, according to the electrical connector 100 of this embodiment, the tapered projection 337a is provided at the end in the width direction of the guide projection 337, so that the guide projection 337 can be smoothly inserted into the plug shell 240.

  Furthermore, according to the electrical connector 100 of the present embodiment, the fitting convex portion 320 includes the electrically insulating block portion 330 that holds the receptacle contact 310 and a receptacle shell made of a conductive material that surrounds the side surface of the block portion 330. Since the receptacle shell 340 is connected to the ground circuit of the substrate with solder or the like, a shielding effect can be obtained.

  Furthermore, according to the electrical connector 100 of the present embodiment, as the required number of plug contacts 210, a plurality of types of plug contacts 210 having different lengths, that is, three types of plug contacts 210 in the illustrated example, are used. Deviation in time can be caused (sequence structure). For example, it is possible to insert and remove a hot wire by contacting the ground contact, the power supply contact, and the signal contact in this order.

  Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described embodiment, and modifications, changes, and additions are possible within the scope of the claims. For example, in the embodiment, it has been described that the surrounding wall is configured by the plug shell 240 made of a conductive metal. However, the surrounding wall may be formed of an insulating material such as an insulating synthetic resin. In this case, the surrounding wall can be integrally formed on the upper surface of the base 220 with the same material as the base 220. Of course, the enclosure wall may be formed separately from the base 220 and fixed to the base 220 using a known coupling means (press-fit, adhesion, screw, etc.).

  According to the present invention, it is possible to solve the above-mentioned problems of the prior art, prevent erroneous mating, smoothly fit without damaging the contacts when mating the plug connector and the receptacle connector, and in addition to the plug An electrical connector having a high contact protection function can be provided.

DESCRIPTION OF SYMBOLS 100 Electrical connector 200 Plug connector 210 Plug contact 211 Contact part 212 Holding part 213 Connection part 220 Base 221 Step part 222 Accommodation groove 223 Insertion hole 224 Side surface 225 Locking claw 227 Fixture accommodation groove 228 Wide width through hole 229 Narrow width through hole 230 , 231 Positioning pin 240 Plug shell 241, 242 Short side wall 243, 244 Long side wall 243 a Inclined wall portion 243 b Concave wall portion 246 Widened portion 247 Reduced portion 250 Fixing tool 252 Grounding piece 260 Plug shell mounting flange 261 Flat wall 262 Hanging wall 263 Opening 264 Slit 265 Elastic tongue 300 Receptacle connector 310 Receptacle contact 311 Contact part 312 Holding part 313 Connection part 320 Fitting convex part 330 Block part 331, 332 Short Side wall surface 333,334 Long side wall surface 333a Inclined surface 333b Concave surface portion 335 Widened portion 336 Reduced width portion 337 Guide projection 337a Slope 340 Receptacle shell 341, 342 Short side wall surface 343, 344 Long side wall surface 343a Inclined Surface 343b Concave portion 350 Housing 360 Base portion 361 Side surface 362 Locking claw 363 Wide through hole 364 Narrow through hole 366, 367 Positioning pin 380 Receptacle shell mounting flange 381 Flat portion 382 Drooping portion 384 Horizontal hole 385 Elastic tongue

Claims (4)

An electrical connector comprising a plug connector and a receptacle connector that are detachably fitted to each other,
The plug connector has a required number of plug contacts and an enclosure wall extending along the insertion / extraction direction of the receptacle connector to collectively surround the required number of plug contacts,
The receptacle connector holds the required number of receptacle contacts that come into contact with the plug contact when the plug connector and the receptacle connector are fitted together, and can be fitted into the enclosure wall of the plug connector. And a fitting projection
The enclosure wall of the plug connector is substantially rectangular in cross section perpendicular to the insertion / extraction direction, and has two short side walls facing each other and two long side walls facing each other, and the two opposing long sides Only one of the side walls is formed with a concave wall that is recessed through the inclined wall toward the other long side wall leaving both ends adjacent to the short side wall,
The fitting convex portion of the receptacle connector has a substantially rectangular cross section perpendicular to the insertion / extraction direction and has two short side wall surfaces facing each other and two long side wall surfaces facing each other. Of the two opposing long side wall surfaces, only the long side wall surface that faces the long side wall in which the concave wall portion is formed when the plug connector and the receptacle connector are interfitted. An electrical connector characterized in that a concave surface portion that is depressed through an inclined surface toward the other long side wall surface is formed leaving both end portions adjacent to the short side wall surface.   When trying to insert the receptacle connector into the top surface of the fitting convex portion from an oblique direction with respect to the plug connector, the receptacle connector enters between the concave wall portion and the other long side wall. The electrical connector according to claim 1, further comprising a guide protrusion that guides the cable to a normal fitting start position.   3. The electrical connector according to claim 2, wherein each of the guide protrusions has a tapered slope at both ends in the width direction with a direction along the short side wall surface being a width direction.   The fitting protrusion includes an electrically insulating block portion that holds the receptacle contact, and a conductive receptacle shell that surrounds the side surface of the block portion and constitutes the long side wall surface and the short side wall surface The electrical connector according to claim 1, wherein the electrical connector comprises:

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