JP5499873B2 - Rectangular connector socket with plug mis-mating prevention structure - Google Patents

Description

  The present invention relates to a multi-pin rectangular connector socket used as a receptacle, and relates to a rectangular connector socket with a plug misfit prevention structure that prevents insertion of a non-regular plug whose shape is smaller than that of a regular plug corresponding thereto. .

  Conventionally, a rectangular connector including a rectangular connector plug having a predetermined rectangular shape and a rectangular connector socket having a plug fitting portion for fitting the plug is used. In this type of rectangular connector, a plate-like contact holding projection is protruded at the center of the plug fitting portion of the socket, and a plurality of contacts are held on both sides thereof. The plug for this is formed with a long groove-like contact holding groove into which the contact holding projection is fitted, and is held in such a manner that the contact is exposed on the inner surface, and the plug and the socket are fitted to each other. Many devices have been developed in which predetermined contacts in both are brought into contact with each other (for example, Patent Document 1).

  This type of rectangular connector connects electronic circuits to each other between a predetermined plug-side electronic device and socket-side electronic device. The size is set to a predetermined square shape, and a structure in which the incompatible plug and socket are not fitted is adopted.

JP-A-8-130052

  However, along with the recent miniaturization of portable electronic devices, the shape of the rectangular connector has been remarkably miniaturized, which makes it difficult to identify the specific plug shape by the user's visual inspection. Since the allowable range of deformation for distinguishing the shape of the plug and socket from other connectors is narrow, there arises a problem that a plug having a shape smaller than a predetermined corresponding plug is erroneously fitted. Yes.

  When such a misfit is made, in particular, in the case of the type in which the contact is exposed to the inner surface of the contact holding groove and the outer surface of the contact holding projection that are fitted to each other, the connection is originally made. There is a problem that electrical connections that should not be made are made, and electronic devices are damaged.

  In view of such a conventional problem, the present invention is a rectangular connector socket with a plug mis-fitting prevention structure that prevents a plug having a shape smaller than that of a corresponding plug to be originally mated and having a shape similar to this from being misfitted. It was made for the purpose of providing.

  The feature of the invention according to claim 1, which solves the conventional problems as described above and achieves the intended purpose, is that contact is made from the inner bottom surface of the plug fitting recess having a rectangular bottomed cylindrical shape with a flat cross section. In a rectangular connector socket in which a piece is projected and a desired electrical connection is made to the plug by inserting a connector plug having a cross-sectional shape corresponding to the shape of the inner peripheral surface of the plug fitting recess ,

  A stopper retracting operation piece that is inserted at a position close to the side of the opening of the plug fitting recess and is moved to the retracting direction side by a normal connector plug, and a center of the plug fitting recess from the stopper retracting operation piece Incorrect fitting preventing member having a stopper for erroneous fitting that is inserted on the side and interlocked with the stopper retracting operation piece, and a common spring piece portion that supports the stopper retracting operation piece and the erroneous fitting preventing stopper With

  When a regular connector plug that matches the shape of the plug fitting recess is inserted, the regular connector plug causes the stopper retracting operation piece to move to the side retracting outside the plug fitting recess, The connector plug can be inserted by retracting the stopper for erroneous fitting out of the plug fitting recess, and when a small non-regular connector plug that does not contact the operation piece is retracted, the error is detected. There is a square connector socket with a plug erroneous fitting prevention structure in which the stopper for preventing fitting does not operate in the retracting direction, and the non-regular connector plug is brought into contact with the stopper to prevent insertion.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the erroneous fitting preventing member is formed by punching and bending a single metal plate to prevent the erroneous fitting of the stopper retracting operation piece. And the common spring piece portion supporting these stoppers are integrally formed and fixed to the outer peripheral surface of the rectangular connector socket.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect, a plug in which the stopper retracting operation piece of the erroneous fitting preventing member and the erroneous fitting preventing stopper are punched and molded on the peripheral wall of the plug fitting concave portion. It exists in being inserted in the plug fitting recessed part through the window hole around the pressing spring piece.

  According to a fourth aspect of the present invention, in addition to the configuration of any one of the first to third aspects, the erroneous fitting preventing member is provided to prevent the erroneous fitting under the tip of one spring piece portion. The stopper is bent downward and the distal ends of a pair of lateral arms extending laterally on both sides of the distal end of the spring piece are bent downward to form a stopper retracting piece.

  According to a fifth aspect of the present invention, in addition to the structure of the first aspect, an outer case made of a metal plate material and a contact holding member made of an insulating synthetic resin material fixed in the outer case. And an erroneous fitting preventing member having a stopper retracting operation piece, an erroneous fitting preventing stopper, and a spring piece portion are integrally formed in the outer case.

  In the present invention, a stopper retracting operation piece that is inserted at a position near the side of the opening of the plug fitting recess of the square connector socket and is moved to the retracting direction side by the regular connector plug, and the stopper retracting operation A stopper that is inserted into the center of the plug fitting recess from one piece and interlocks with the stopper retracting operation piece, and a common spring piece that supports the stopper retracting operation piece and the erroneous fitting preventing stopper. When a regular connector plug matching the shape of the plug fitting recess is inserted, the stopper retracting operation piece is retracted out of the plug fitting recess by the regular connector plug. The connector plug can be inserted when the stopper for erroneous fitting prevention is retracted out of the plug fitting recess in conjunction with this. When a small non-regular connector plug that does not come into contact with the stopper retreating operation piece is inserted, the erroneous fitting prevention stopper does not operate in the retraction direction, and the non-regular connector plug abuts against this and the insertion is not possible. By being prevented, erroneous fitting of a small non-regular connector plug that can be fitted into the plug fitting recess is accurately prevented, and the safety of the electronic device is maintained.

  In the present invention, the stopper-retracting operation piece, the stopper for preventing erroneous fitting, and the common spring piece portion supporting them are integrally formed by punching and bending a single metal plate for the erroneous fitting preventing member. And fixing this to the outer peripheral surface of the rectangular connector socket, it is possible to obtain a structure having an erroneous fitting prevention function with almost no change in the design of the existing rectangular connector socket.

  According to the present invention, the stopper retracting operation piece of the erroneous fitting preventing member and the erroneous fitting preventing stopper are inserted into the plug fitting recess through a window hole around a plug pressing spring piece formed by punching the peripheral wall of the plug fitting recess. By inserting it into the connector, the degree of change in the design of the existing rectangular connector socket can be reduced, and an erroneous fitting prevention function can be added.

  In the present invention, the misfitting prevention member is formed by bending the misfitting prevention stopper downwardly below the tip of one spring piece, and extending laterally on both sides of the tip of the spring piece. By bending the tip of the lateral arm portion downward to form the stopper retracting operation piece, the erroneous fitting preventing member is configured in a compact shape, and it is easy to equip a small rectangular connector socket.

  According to the present invention, the plug fitting recess includes an outer case made of a metal plate material and a contact holding member made of an insulating synthetic resin material fixed in the outer case. By integrally molding the anti-fitting stopper and the misfitting prevention member having the spring piece, the improper fitting prevention member can be formed simultaneously with the molding of the outer case, making it easy to work and preventing misfitting. A special assembly process for adding functions is not required, and the manufacturing can be performed at low cost.

It is a perspective view of the 1st Example of the square connector socket with a plug incorrect fitting prevention structure concerning the present invention. (A) is a top view same as the above, (b) is the same front view. It is a perspective view of the contact holding member used for the square connector socket with a plug incorrect fitting prevention structure shown in FIG. It is a perspective view of the outer case used for the square connector socket with a plug incorrect fitting prevention structure shown in FIG. FIG. 2 is a perspective view of a misfitting prevention member used in the rectangular connector socket with a plug misfitting prevention structure shown in FIG. 1. (A) is a top view same as the above, (b) is the same front view, (c) is the same side view. It is explanatory drawing which shows operation | movement of the incorrect fitting prevention member at the time of inserting a regular plug in the square connector socket with a plug incorrect fitting prevention structure concerning this invention, (a) is a front view, (b) is a side view. It is. It is explanatory drawing which shows operation | movement of the incorrect fitting prevention member at the time of inserting a non-regular plug in the square connector socket with a plug incorrect fitting prevention structure concerning this invention, (a) is a front view, (b) is a side. The 2nd Example of the square connector socket with a plug incorrect fitting prevention structure concerning this invention is shown, (a) is a top view, (b) is a front view.

  Next, embodiments of the present invention will be described based on examples shown in the drawings. FIGS. 1-6 has shown the 1st Example of the square connector socket with a plug incorrect fitting prevention structure based on this invention. This rectangular connector socket is pressed by a contact holding member 1 molded by an insulating synthetic resin that holds a predetermined number of contacts, and a metal plate material that holds and encloses the contact holding member 1 and forms a plug fitting recess 4. The outer case 2 is formed from a molded member that is press-molded by the same metal plate and fixed to the outer case 2.

  As shown in FIGS. 1 to 3, the contact holding member 1 has a main body portion 5 having the same cross-sectional shape as the opening of the plug fitting concave portion 4 of the outer case 2, and is disposed around the outer periphery of the main body portion 5. The outer case 2 is fixed to the outer case 2, whereby the contact holding member 1 is held in the outer case 2. The front surface side of the main body 5 constitutes the innermost part (bottom surface) of the plug fitting recess 4.

  On the front side of the contact holding member 1, that is, on the plug fitting recess 4 side, a plate-like contact holding projection 6 is integrally projected.

  A large number of contacts 7 are integrated with the contact holding member 1 by insert molding. Each contact 7 integrally has a terminal portion 8 for solder extended from the back surface side to the bottom surface side of the main body portion 5, and a contact portion 9 exposed on the outer surface of the contact holding projection 6. Have.

  As shown in FIGS. 1, 2, and 4, the outer case 2 is formed by punching a strip-shaped metal plate and bending it into a cylindrical shape having a cross-sectional shape of the plug fitting recess 4. Both ends of the belt-like shape are brought together on the bottom side and joined in a dovetailed state, that is, one dovetail navel 15 is fitted to the other dovetail recess 16 to be prevented from opening.

  The outer case 2 is provided with ground terminals 17 and 17 that are connected to the ground side of the substrate on both sides of the bottom surface, and the upper surface of the outer case 2 is pressed against the upper surface of the plug to be fitted to provide a retaining resistance. The plug pressing spring pieces 18, 18 are formed by cutting out a metal plate constituting the outer case 2, and the front and left and right sides of the plug pressing spring pieces 18, 18 are continuous in the window hole 19. It has become.

  The outer case 2 has a plug fitting recess peripheral wall 2a on the opening side of the contact holding member 1, and the outer case 2 has a flat cross section having a square cross section by the peripheral wall 2a and the main body 5 of the contact holding member 1. A bottom-cylindrical plug fitting recess 4 is formed, and the holding projection 6 is in contact with the inner bottom surface and protrudes toward the opening.

  As shown in FIGS. 1, 2, and 5 to 6, the misfitting prevention member 3 is formed by punching and bending a metal plate, and is arranged so as to sandwich both side surfaces on the rear end side of the outer case 2. A pair of side plate portions 25, 25, a bridge portion 26 connecting the two side plate portions on the upper surface of the rear end side of the outer case 2, and a spring piece portion integrally formed in a direction extending from the center of the bridge portion 26 to the front side. 27.

  Each side plate portion 25 is formed with a stopper piece 28 that contacts the upper surface of the outer case 2 at the upper edge of the front side, and engages with the downward edge of the locking window 20 formed in the outer case 2 at the lower edge of the front portion. An elastic locking claw 29 is formed, and by fitting the erroneous fitting preventing member 3 from the upper side of the outer case 2, the elastic locking claw 29 is engaged with the downward edge of the locking window 20 in a state of being fastened. The case 2 is prevented from coming off. Further, the elastic locking claw 29 is brought into contact with the forward-facing edge of the engagement window 20 so that the rearward movement of the outer case 2 is prevented.

  A stop piece 30 is bent downward at the rear edge of the bridge 26, so that the stop piece 30 abuts on the upper rear end of the outer case 2 to prevent the erroneous fitting preventing member 3 from moving forward. It has become.

  The spring piece portion 27 is not a regular plug (hereinafter referred to as a regular plug) corresponding to this rectangular connector socket, but is inserted incorrectly with a smaller non-regular plug. Stopper stoppers 35, 35 and stopper retraction operation pieces 36, 36 for retracting the erroneous fitting prevention stopper 35 out of the plug fitting recess 4 when the regular plug is inserted. .

  The erroneous fitting prevention stoppers 35, 35 are bent downward from both side edges of the spring piece portion 27 and inserted into the center portion in the width direction of the plug fitting concave portion 4.

  The stopper retracting operation pieces 36, 36 are formed by forming the stopper retracting operation pieces by bending the distal ends of the lateral arm portions 37 extending laterally on both sides of the distal end portion of the spring piece portion 27. It is inserted at the position where it is aligned. The stopper retracting operation pieces 36, 36 are formed with a tapered edge 38 on the plug fitting recess 4 side. The tapered edge 38 has a plug fitting recess opening side that is substantially the same height as or higher than the upper surface in the plug fitting recess 4, and the plug fitting recess back side is inserted into the plug fitting recess 4 from the upper surface. It is formed in the taper shape used as the height made.

  When the regular plug A is inserted into the plug fitting recess 4 as shown in FIG. 7, the taper edge 38 is pushed up by the edge of the regular plug, thereby causing the spring via the lateral arm 37. The piece 27 is curved upward, whereby the erroneous fitting prevention stopper 35 is moved to a position where it is retracted from the plug fitting recess 4 so that the regular plug A can be inserted to a predetermined fitting position. .

  On the other hand, as shown in FIG. 8, when the non-regular plug B having a size that does not come into contact with either of the stopper retracting operation pieces 36, 36 is inserted, the stopper retracting operation piece 36 on the non-contact side is inserted into the plug fitting recess. 4 is not pushed up in the direction of retracting from the inside, and both or one of the erroneous fitting prevention stoppers 35 and 35 are not sufficiently retracted from the inside of the plug fitting recess 4, and this is the end face of the non-regular plug B Are in contact with each other, and further insertion operation is prevented.

  In the above-described example, a pair of erroneous fitting prevention stoppers 35, 35 is provided on the base side of one spring piece portion 27, and the stopper retracting operation pieces 36, 36 are supported on the tip side. In addition, as shown in FIG. 9, the tip of the spring piece 27 is bent downward to provide a single erroneous fitting prevention stopper 40, and lateral arm portions 41, 41 are formed on the base side from these, The stopper retracting operation pieces 36, 36 may be formed at the tip.

  Further, although not shown in the drawing, two spring pieces may be provided, and a stopper retracting operation piece and an erroneous fitting preventing stopper may be provided at the tip thereof.

  Further, in the above-described example, the stopper retracting operation piece and the erroneous fitting preventing stopper are provided on the erroneous fitting preventing member 3 different from the outer case 2, but the stopper retracting operation piece and the erroneous fitting preventing stopper are provided. May be formed integrally with the outer case 2 to constitute an erroneous fitting preventing member.

DESCRIPTION OF SYMBOLS 1 Contact holding member 2 Outer case 2a Perimeter wall 3 Incorrect fitting prevention member 4 Plug fitting recessed part 5 Body part 6 Contactor holding protrusion 7 Contact 8 Solder terminal part 9 Contact part 15 Dovetail navel 16 Dovetail part 17 Ground terminal 18 Spring piece 19 for plug pressing 19 Window hole 20 Engagement window 25 Side plate part 26 Bridge part 27 Spring piece part 28 Stopping piece 29 Elastic locking claw 30 Stopping piece 35 Downwardly-fixing stopper 36 Stopper retracting operation piece 37 Sideways Arm portion 38 Tapered edge portion 40 Incorrect fitting prevention stopper 41 Sideways arm portion A Regular plug B Non-regular plug

Claims (4)

By inserting a connector plug having a cross-sectional shape corresponding to the inner peripheral surface shape of the plug fitting recess (4) having a rectangular bottomed cylindrical shape with a flat cross section, a desired electrical connection to the connector plug is achieved. In the rectangular connector socket
A contact (7) protruding from the inner bottom surface of the plug fitting recess (4);
A spring piece portion (27), a stopper (35, 40) for preventing erroneous fitting formed by bending downward on the spring piece portion (27), and a lateral arm portion (37, 41) extending laterally of the spring piece portion (27). ) And a stopper retraction operation piece (36) formed by bending the tip end downward,
The stopper retracting operation piece (36) is inserted at a position shifted to the side of the opening of the plug fitting recess (4), and moved to the retracting direction side by the regular connector plug (A).
The erroneous fitting prevention stoppers (35, 40) are inserted into the center of the plug fitting recess (4) from the stopper retracting operation piece (36), and interlocked with the stopper retracting operation piece (36).
When the regular connector plug (A) that matches the shape of the plug fitting recess (4) is inserted, the stopper retracting operation piece (36) is moved out of the plug fitting recess (4) by the regular connector plug (A). The connector plug can be inserted when the stopper (35, 40) for preventing erroneous fitting is retracted outside the plug fitting recess (4) in conjunction with this operation.
When a small non-regular connector plug (B) that does not come into contact with the operating piece (36) for retracting the stopper is inserted, the erroneous fitting prevention stopper (35) does not operate in the retracted direction and is used for preventing erroneous fitting. A rectangular connector socket with a plug misfit prevention structure characterized in that the non-regular connector plug (B) abuts against the stopper (35, 40) to prevent insertion.
The erroneous fitting preventing member (3) is formed by punching and bending a single metal plate material, thereby stopping the stopper retreating piece (36), the erroneous fitting preventing stopper (35, 40), and a common spring supporting them. One piece (27) is formed integrally,
The rectangular connector socket with a plug erroneous fitting prevention structure according to claim 1, wherein the erroneous fitting preventing member (3) is fixed to the outer peripheral surface of the rectangular connector socket. A window hole (19) around the plug pressing spring piece (18) in which the stopper retracting operation piece (36) and the erroneous fitting prevention stopper (35, 40) are punched and formed on the peripheral wall (2a) of the plug fitting recess. The rectangular connector socket with a plug incorrect fitting prevention structure according to claim 1 or 2, which is inserted into the plug fitting recess (4) through the plug. The plug fitting recess (4) is composed of an outer case (2) made of a metal plate material and a contact holding member (1) made of an insulating synthetic resin material fixed in the outer case (2).
The square connector socket with a plug erroneous fitting prevention structure according to claim 1 or 3, wherein an erroneous fitting prevention member (3) is integrally formed with the outer case (2).

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