JP6622841B2 - Branch connector, extension connector with cord, and plug connector for wiring - Google Patents

Description

  The present invention relates to a branch connector for extending and connecting a commercial power source supplied to a plug receptacle (outlet) provided on a wall surface of an office or a general household, an extension connector with a cord, and a plug connector for wiring. In particular, the present invention relates to a branch connector, a corded extension connector, and a wiring plug connector that are used without being fixed to a wall surface or the like.

  A commercial power supply can be extended from a single plug receptacle and branch connections can be made in multiple ways. Plug-in multi-tap (power tap) or cord-connected multi-tap (table) can be used without being fixed to the wall or floor. (Tap) etc. are known (see Patent Document 1 as an example). Such a conventional power strip has a plug portion (insertion plug) that can be attached to a plug receptacle (outlet) on the side opposite to the side on which the power cord (cord) of the table tap is attached. . A plurality of power taps having a uniform appearance with the table tap can be connected like a daisy chain. According to the power tap, the shape of the power outlet tap can be simplified, and the outlet portion can be added without causing a protrusion.

Japanese Patent Laid-Open No. 2003-234159, FIGS. 1 and 2

  However, in such a conventional plug-in type multi-tap, the connection point with the cord-connected multi-tap is in the direction in which the cord attached to the cord-connected multi-tap extends, that is, on the extension line of the wiring. In addition, the insertion / extraction direction of the cord connection type multi-tap and the plug-in type multi-tap is the same as the extension direction of the wiring. For this reason, when a cord-connected multi-tap cord or an electrical device connected to the plug-in multi-tap is pulled, the plug-in multi-tap can be unintentionally disconnected from the cord-connected multi-tap. There is. If an external force is applied to the cord connection type multi-tap or the plug-in type multi-tap, the contact state between the cord connection type multi-tap blade receptacle and the plug type multi-tap plug plug blade becomes unstable, and heat is generated. It may occur.

  On the other hand, in order to prevent the plug plug blade and the blade holder from coming off, providing a protrusion or a stopper on them affects the current cross-sectional area of the plug plug blade and the blade holder, and the contact state is also unstable. There is a possibility of becoming. In addition, providing these plug stopper blades and blade holders with these retaining mechanisms increases the number of components, complicates the structure, and complicates assembly, resulting in increased manufacturing costs.

  The present invention has been made against the background of the prior art as described above. An object of the present invention is to provide a branch connector, a corded extension connector, and a wiring plug connector that can be reliably secured with a simple configuration.

  In order to achieve the above object, the present invention is configured as having the following features.

  That is, the present invention includes a housing, a plug plug blade located on one side of the housing, and spaced apart from the one side toward the other side of the housing. In the branching connector comprising a plurality of blade receivers connected to each other and a plurality of blade receiving holes provided corresponding to the plurality of blade receivers, a cord for connecting the plug plug blade is provided on the one side. A plug fitting blade that is provided in the first fitting portion and intersects with a direction extending from the one side to the other side; It extends in the direction to do.

  According to the present invention, since the plug plug blade extends in a direction intersecting with the direction extending from one side of the housing to the other side, even if an external force such as pulling acts in the extending direction of the housing. The component force does not act as the plug plug blade insertion / extraction force, making it difficult to remove the plug plug blade from the extension connector with cord.

  The first fitting part can be configured to be a convex part protruding from the housing to the one side.

  According to the present invention, since the first fitting portion is a convex portion that protrudes from the housing to one side, the fitting structure can be easily formed with the extension connector with cord. And the fitting structure can prevent foreign matters such as dust from entering between the plug plug blade and the extension connector with cord.

  The first fitting portion has a first engagement portion that meshes with the extension connector with cord, and the first engagement portion extends along a direction in which the plug plug blade extends. Can be configured.

  According to the present invention, the first meshing portion that meshes with the extension connector with a cord extends along the direction in which the plug plug blade extends, so that an external force such as pulling acts particularly in the direction in which the housing extends. However, the component force does not act as an insertion / extraction force of the plug plug blade, and the plug plug blade can be more easily removed from the extension connector with cord.

  The housing has a protruding piece that engages with the extension connector with cord on the one side, and the protruding piece can be configured to extend along a direction in which the plug plug blade extends.

  According to the present invention, since the casing has the projecting piece that meshes with the extension connector with cord, when the extension connector with cord is connected to the branch connector, it is guided so as to be fitted at a correct position. can do. Furthermore, according to the present invention, the projecting piece that engages with the extension connector with cord can receive the external force when the branch connector and the extension connector with cord are coupled. The resulting stress can be dispersed.

  At the end of the plug plug blade in the extending direction, a step portion can be provided between the housing and the protruding piece.

  According to the present invention, when the branch connector is started to be connected to the corded extension connector by the step portion, the region where both overlap in the extending direction of the plug plug blade (extension direction) (temporary placement) Region). That is, it is possible to easily recognize the shift of the branch connector with respect to the extension connector with a cord from the appearance in a direction intersecting the extension direction (cross direction). As a result, the position of the branch connector can be adjusted in the crossing direction in a state where the extension connector with cord and the end in the extending direction of the projecting piece are in contact with each other. Can be made easier.

  The present invention further includes a housing, a cord that extends from one side of the housing and supplies power, and is spaced from the one side toward the other side of the housing. In the extension connecting device with a cord comprising a blade receptacle connected to the blade receptacle and a blade receptacle hole provided corresponding to the blade receptacle, the branch connector having a plug plug blade connected to the blade receptacle on the other side The blade receiving hole is provided in the second fitting portion and extends in a direction intersecting with the direction extending from the one side to the other side. It penetrates so that it may do.

  According to the present invention, since the blade receiving hole penetrates so as to extend in a direction intersecting with the direction extending from one side of the housing to the other side, an external force such as pulling is particularly exerted in the extending direction of the housing. Even if it acts, the component force does not act as an insertion / extraction force of the insertion plug inserted into the blade receiving hole, and it is possible to make it difficult to remove the insertion plug from the blade receiving hole.

  The second fitting portion can be configured to be a concave portion recessed from the housing to the one side.

  According to the present invention, since the second fitting portion is a recess recessed from the housing to one side, the fitting structure can be easily formed with the branch connector. The fitting structure can prevent foreign matter such as dust from entering between the blade receiving hole and the branch connector.

  It can comprise so that the said recessed part may be pinched | interposed from both outer sides, and it may have a wall part protruded along the direction where the said blade receiving hole is extended.

  In the present invention, the concave portion is sandwiched from both outer sides and the wall portion protrudes along the direction in which the blade receiving hole extends, so that the fitting structure with the branching connector is located on the inner side of the wall portion and is not exposed. . For this reason, a connecting connector for a branch does not come out of the connecting connector for extension with a cord when a finger or the like hits the fitting structure with the connecting connector for a branch unintentionally.

  The second fitting portion includes a second meshing portion that meshes with the branch connector, and the second meshing portion can be configured to extend along a direction in which the blade receiving hole extends. .

  According to the present invention, since the second meshing portion that meshes with the branch connector extends along the direction in which the blade receiving hole extends, even when an external force such as pulling acts in the direction in which the housing extends, The component force does not act as an insertion / extraction force, and the insertion plug can be more difficult to be removed from the blade receiving hole.

  The housing may have a raceway groove that meshes with the branch connector on the other side, and the raceway groove may be configured to extend along a direction in which the blade receiving hole extends.

  According to the present invention, since the housing has the raceway groove that meshes with the branch connector, when the branch connector is connected to the extension connector with a cord, it is guided so as to be fitted at a correct position. Can do. Furthermore, according to the present invention, since the raceway groove that meshes with the branch connector can receive the external force when the extension connector with cord and the branch connector are connected, the stress generated between the two Can be dispersed.

  Furthermore, the present invention includes any one of the branch connectors according to the present invention and any one of the cord extension connectors according to the present invention.

  According to the present invention, the plug stopper blade extends in a direction intersecting with the direction extending from one side of the housing to the other side, and the blade receiving hole penetrates in the same direction. Even if an external force such as pulling acts on the plug plug, the component force does not act as a plug plug blade insertion / extraction force, making it difficult to remove the plug plug blade from the blade receiving hole.

  According to the plug-in connector for wiring of the present invention, it is possible to function to prevent the connected connectors from coming off while having a relatively simple configuration. Therefore, according to the present invention, it is possible to provide a branch connector, a corded extension connector, and a wiring plug connector having a retaining function.

The disassembled perspective view of the multi tap combination by one Embodiment. The perspective view of the multi tap combination body of FIG. The top view of a plug-in type multi tap. The front view of the plug-in type multi tap of FIG. The disassembled perspective view of a cord connection type multi tap. The bottom view of the cord connection type multi tap of FIG.

  Hereinafter, a multi-tap combination body 100 as an embodiment of the “wiring plug connector” of the present invention will be described with reference to the drawings. A multi-tap combination 100 exemplified in the following embodiment includes one plug-in type multi-tap 1 as a “branch connector” and one cord-connected multi-tap 3 as a “cord extension connector”. Are combined. However, the “wiring plug connector” of the present invention is not limited to one in which the plug-in type multi-tap 1 and the cord-connect type multi-tap 3 are combined one by one, and each has a plurality of configurations. It doesn't matter.

  The terms “first” and “second” described in the specification and claims are used to distinguish different components of the invention, and indicate a specific order or superiority or inferiority. It is not intended for use.

  In this specification, drawings, and claims, for convenience, as shown in FIG. 1 and the like, the short direction (width direction, left and right direction) of the multi-tap combination 100 is the X direction, and the long direction (depth direction, front and back). The direction will be described as the Y direction, and the height direction (vertical direction, insertion / extraction direction of the cord-connected multi-tap 3 with respect to the plug-in type multi-tap 1) will be described as the Z direction.

  More specifically, in the Y direction in the multi-tap combination 100, the installation side of the plug-in type multi-tap 1 is the “front (front) side”, and the installation side of the cord connection type multi-tap 3, particularly the cord 30A is attached. The side which is present will be described as the “rear (back) side”. Further, as shown in FIG. 2, when the cord-connected multi-tap 3 is connected to the plug-in multi-tap 1 in the Z direction, the installation side of the plug-in multi-tap 1 is set to “lower”. The arrangement side of the cord connection type multi-tap 3 will be described as “upper side”. However, they do not limit the mounting direction and mounting method of the cord-connected multi-tap 3 to the plug-in multi-tap 1.

Multi-tap combination 100

  The multi-tap combination body 100 is a combination body of a plurality of connectors that can be connected to a commercial power source from a single plug receptacle (outlet) and can be branched into a plurality of branches and used without being fixed to a wall surface or a floor surface. As shown in FIG. 1, the multi-tap combination 100 includes a plug-in type multi-tap 1 and a cord connection type multi-tap 3. The plug-in type multi-tap 1 and the cord connection type multi-tap 3 are configured to be detachable as shown in the detached state of FIG. 1 and the worn state of FIG. When the plug-in type multi-tap 1 and the cord-connection type multi-tap 3 are connected, commercial power is supplied from the cord-connection type multi-tap 3 toward the plug-in type multi-tap 1.

Plug-in multi-tap 1

  The plug-in type multi-tap 1 is configured as a “branch connector” for branching and connecting a plurality of input commercial power supplies. As shown in FIGS. 1 and 2, the plug-in type multi-tap 1 has a bowl-shaped bottom part 11 and a lid part 12 having a shape in which the bowl-shaped top and bottom are reversed corresponding to the shape of the bottom part 11. Yes. The bottom portion 11 and the lid portion 12 are molded bodies made of electrically insulating resin, and constitute a housing 10 as a “first housing” of the plug-in type multi-tap 1. The plug-in type multi-tap 1 is connected to the bottom portion 11 located on the lower side in the Z direction so that the lid portion 12 covers from the upper side, so that the “other side” from the rear in the Y direction becomes “the other side”. It is formed in a hollow rectangular parallelepiped shape that extends longer in the front in the Y direction as the “side”.

  By connecting the bottom portion 11 and the lid portion 12, the insertion-side rear wall portion 13 extending along the XZ plane is formed at the rear end in the Y direction of the insertion type multi-tap 1. At the outer end, plug-in side wall portions 14 and 14 extending along the YZ plane are formed. The insertion side rear wall portion 13 and the insertion side lateral wall portions 14, 14 both extend in a direction intersecting with the insertion side lower wall portion 15 that forms the bottom surface of the insertion type multi-tap 1.

  The plug-in type multi-tap 1 has a convex portion 16 as a “first fitting portion” on the rear side in the Y direction as “one side”. The convex portion 16 is a portion that performs a function of preventing the plug-in type multi-tap 1 with respect to the cord-connected multi-tap 3, particularly in the Y direction. As shown in FIGS. 1, 3, and 4, the convex portion 16 is formed so as to protrude rearward in the Y direction from the insertion-side rear wall portion 13 in the rectangular parallelepiped structure of the insertion-type multi-tap 1. ing. The convex portion 16 is formed in a hollow rectangular parallelepiped shape having a bottom surface 17 as a bottom surface that extends flush with the insertion-side lower wall portion 15 of the bottom portion 11 from the insertion-side rear wall portion 13. The convex portion 16 has a front end surface portion 18, an upper surface portion 19, and two side surface portions 20 and 20. The front end surface portion 18 extends between the rear ends of the two side surface portions 20 and 20 along the X direction and the Z direction.

  As shown in FIGS. 3 and 4, the upper surface portion 19 is formed in the Z direction of the front end surface portion 18 and the two side surface portions 20, 20 in the region surrounded by the front end surface portion 18 and the two side surface portions 20, 20. It extends along the XY plane flush with the upper end of.

  The upper surface portion 19 is provided with a pair of plug plug blades 21 formed in a convex shape (cuboid shape) from a conductive metal. The plug plug blade 21 is a part that is supplied with commercial power by being inserted into a plug receiver such as an outlet. As shown in FIG. 3, the pair of plug stopper blades 21 are formed in the region of the convex portion 16 in plan view.

  As shown in FIGS. 1 and 3, the pair of plug plug blades 21 are arranged in the Y direction (the direction in which the convex portion 16 protrudes from the insertion-side rear wall portion 13) and the Z direction (the cord for the insertion type multi-tap 1 The connecting multi-tap 3 extends in parallel with each other along the insertion / extraction direction). The pair of plug stopper blades 21 both penetrate the upper surface portion 19 and protrude upward in the Z direction as shown in FIG. That is, the plug stopper blade 21 extends in a direction intersecting with the direction extending from the rear side to the front side in the Y direction of the housing 10. The pair of plug plug blades 21 are configured such that the insertion / extraction direction of the cord connection type multi-tap 3 is along the Z direction. Since the pair of plug stopper blades 21 extend along the Z direction, even if an external force such as pulling acts on the plug-in type multi-tap 1 particularly in the Y direction, it is difficult for the plug stopper blades 21 to come out of the plug receiver.

  The upper surface portion 19 is spaced from the lower surface portion 17 at the lower end of the convex portion 16 in the Z direction so that the sum of the length of the plug plug blade 21 in the Z direction is shorter than the length of the plug-in multi-tap 1 in the Z direction. What is necessary is just to form with height. As a result, when the plug-in type multi-tap 1 and the cord connection type multi-tap 3 are connected, it is possible to prevent a portion protruding in the Z direction from the rectangular parallelepiped structure of the multi-tap combination 100. . If there is a portion that protrudes from the Z direction, a gap may be created when the multi-tap combination 100 is installed, or the plug-in multi-tap 1 may be unintentionally removed from the cord-connected multi-tap 3. It may come off.

  Here, as the pair of plug plug blades 21, a shape corresponding to a parallel two-pole outlet having a rated current of 15 A and a rated voltage of 125 V, which is used in general homes and offices in Japan, is illustrated. However, the plug plug blade 21 may have various shapes used around the world, such as a bipolar plug and a cylindrical plug that are not parallel to each other. Further, the plug plug blade 21 may be configured by three or more including a ground electrode and the like.

  The two side surface portions 20 and 20 extend along the Y direction and the Z direction, respectively. As shown in FIG. 3, the distance between the side surfaces 20, 20 is the length of the plug-in type multi-tap 1 in the X direction (short direction), that is, the distance between the two plug-in side wall portions 14, 14. It is formed smaller than. Therefore, the convex part 16 has a width smaller than the rectangular parallelepiped structure of the plug-in type multi-tap 1 in the X direction (short direction) of the plug-in type multi-tap 1.

  Each of the two side surface portions 20 and 20 has engagement grooves 22 and 22 as “first engagement portions”. The engaging grooves 22 and 22 intersect the connecting direction (insertion / extraction direction of the plug plug blade 21) during and after the connection of the plug-in type multi-tap 1 and the cord connection type multi-tap 3, particularly the Y direction. It is a part that fulfills the function of restricting displacement from each other.

  As shown in FIG. 3, each of the engagement grooves 22 and 22 is recessed in a direction approaching each other in the X direction from the two side surface parts 20 and 20 in a plan view, and has a rectangular shape longer in the Y direction than in the X direction. Has been. As shown in FIG. 4, each of the engagement grooves 22 and 22 is formed from the upper end to the lower end in the Z direction of the convex portion 16, and has a shape lacking in a rectangular parallelepiped shape along the Z direction. The meshing grooves 22, 22 extend along the direction in which the plug stopper blade 21 extends, that is, the insertion / extraction direction of the plug stopper blade 21 with respect to the cord-connected multi-tap 3.

  The lid 12 has two projecting pieces 23, 23 on the rear side in the Y direction. The projecting pieces 23 and 23 are parts that perform a function of guiding the plug-in type multi-tap 1 to a correct position when connecting the plug-in type multi-tap 1 to the cord-connected multi-tap 3. As shown in FIGS. 1, 3, and 4, the projecting pieces 23 and 23 are formed so as to protrude from the rectangular parallelepiped structure of the plug-in type multi-tap 1. As shown in FIG. 3, each of the projecting pieces 23 and 23 is formed in an L shape in plan view, protrudes rearward in the Y direction from the insertion-side rear wall portion 13, and extends from the rear end where each protrudes X Bending toward the outside in the direction (short direction of the plug-in type multi-tap 1). Such a structure along the XY plane of the projecting pieces 23, 23 extends along the insertion / extraction direction of the plug stopper blade 21.

  Both the projecting pieces 23, 23 extend upward from the lower end in the Z direction of the lid portion 12, and are formed up to the middle of the lid portion 12 in the vertical direction. That is, the protrusions 23 and 23 are not formed in the upper region of the lid 12. As shown in FIG. 4, the plug-in type multi-tap 1 has an upper end portion of the lid portion that is the upper end of the lid portion 12 at the end of the lid portion 12 and the protruding pieces 23 and 23 in the extending direction of the plug stopper blade 21. A step portion 26 is provided between the upper end portion 25 and the upper end portion 25 of the projecting piece 23, 23.

  When the plug-in type multi-tap 1 starts to be connected to the cord connection type multi-tap 3 by the step portion 26, a region where both overlap in the Z direction (temporary placement region) can be created. That is, in the X direction and the Y direction, it is possible to easily recognize the displacement of the plug-in type multi-tap 1 with respect to the cord connection type multi-tap 3 from the appearance. Accordingly, the position of the plug-in type multi-tap 1 can be adjusted in the X direction and the Y direction with the cord-connected multi-tap 3 and the upper ends of the projecting pieces 23 and 23 in contact with each other. 3 can be more easily connected to the plug-in type multi-tap 1.

  A plurality of blade receiving holes 27,..., 27 are positioned so as to be separated from the rear side in the Y direction where the plug stopper blade 21 is located toward the front side in the Y direction of the housing 10. As shown in FIGS. 1 and 2, the plurality of blade receiving holes 27,..., 27 are near the boundary between the lid portion 12 and the bottom portion 11 on the insertion side lateral wall portion 14 on one side and the top of the lid portion 12. Two pairs are formed on each surface, and a total of four pairs are formed in a concave shape. The plug-in type multi-tap 1 has a blade holder (not shown) made of conductive metal, which is respectively arranged corresponding to the blade receiving holes 27,. The plug stopper blade 21 and the blade receiver are electrically connected by connection terminals (not shown) made of conductive metal, and the plug-in multi-tap 1 is supplied with commercial power to each blade receiver. It is configured as follows. And the commercial power supply will be supplied to the electric equipment by inserting the blade of the plug of an electric equipment in any blade receiving hole 27.

  The insertion type multi-tap 1 is not limited in the arrangement and number of the blade receiving holes 27, and can be arranged by increasing or decreasing the number of the blade receiving holes 27 as necessary. Further, the plug-in type multi-tap 1 may have a USB (Universal Serial Bus) power feeding function, and the plug-in side wall portions 14 and 14 and the top surface of the lid portion 12 and the like. USB port can be formed. Furthermore, an on / off switch may be provided in each blade receiving hole 27 of the plug-in type multi-tap 1.

Cord connection type multi-tap 3

  The cord connection type multi-tap 3 is configured as a “connector for extension with cord” for extending and connecting an inputted commercial power source. As shown in FIG. 5, the cord-connected multi-tap 3 includes a bowl-shaped bottom part 31 and a lid part 32 having a shape in which the bowl-shaped top and bottom are reversed corresponding to the shape of the bottom part 31. The bottom portion 31 and the lid portion 32 are molded bodies made of an electrically insulating resin, and constitute a housing 30 </ b> B as a “second housing” of the cord-connected multi-tap 3. And the cord connection type multi-tap 3 is connected so that the cover part 32 covers from the upper side to the bottom part 31 positioned on the lower side in the Z direction, so that the “other side” from the rear in the Y direction as “one side” It is formed in a hollow rectangular parallelepiped shape that extends longer in the front in the Y direction as “side” (see FIGS. 1 and 2). For example, the cord connection type multi-tap 3 is configured to have the same length as the plug-in type multi-tap 1 in the X direction and the Z direction (see FIG. 2).

  By connecting the bottom portion 31 and the lid portion 32, a cord-side front wall portion 33 extending along the XZ plane is formed at the front end in the Y direction of the cord-connected multi-tap 3, and both outer ends in the X direction. Are formed with cord side lateral walls 34 and 34 extending along the YZ plane, respectively (see FIGS. 1 and 6). The cord-side front wall portion 33 and the cord-side lateral wall portions 34, 34 both extend in a direction intersecting with the cord-side lower wall portion 35 that forms the bottom surface of the cord-connected multi-tap 3.

  As shown in FIG. 2, the cord-connected multi-tap 3 is configured such that the cord-side front wall 33 contacts the plug-side rear wall 13 when connected to the plug-in multi-tap 1. Further, the cord-connected multi-tap 3 is configured such that when the cord-connected multi-tap 1 is connected to the plug-in multi-tap 1, both the cord-side lateral wall portions 34 and 34 are flush with the plug-in side lateral wall portions 14 and 14, respectively. ing. Further, the cord connection type multi-tap 3 is configured such that the cord-side lower wall portion 35 is flush with the insertion-side lower wall portion 15 when connected to the plug-in type multi-tap 1. As a result, when the multi-tap combination 100 is installed, a gap is created and the state becomes unstable, or the plug-in multi-tap 1 is unintentionally removed from the cord-connected multi-tap 3. There is no. And the multi tap combination body 100 is comprised so that when the plug-in type multi tap 1 and the cord connection type multi tap 3 are combined, it will become just a rectangular parallelepiped shape.

  As shown in FIG. 6, a cord 30A is attached to the cord-connected multi-tap 3 so as to be located at the rear end in the Y direction, and as shown in FIG. Has been introduced. The cord 30 </ b> A is a portion that extends (supplies) a commercial power supply (power supply) supplied to a plug receptacle (outlet) provided on a wall surface of an office or a general household to the inside of the cord-connected multi-tap 3. As shown in FIG. 6, the cord 30A extends from the rear end in the Y direction of the cord-connected multi-tap 3 along the Y direction, and has a high flexibility in a range not shown. It is configured to be freely curved. Accordingly, when a strong external force is applied to the cord 30A, particularly in the direction of pulling, a force directed backward is applied to the cord-connected multi-tap 3.

  The tip of the cord 30A introduced into the housing 30B is electrically connected to the conductive metal blade receiver 36. The blade receiver 36 is also referred to as a blade receiver spring, and is configured to hold the plug stopper blade 21 inserted into the plug receiver at a tip portion divided into two portions so as to be sandwiched from a direction intersecting the insertion direction. The cord connection type multi-tap 3 is configured such that commercial power is supplied to the blade receiver 36 via a cord 30A from a plug receiver (outlet) provided on a wall surface of an office or a general household. And the cord connection type multi tap 3 is comprised so that a commercial power supply may be supplied with respect to the plug stopper blade 21 inserted in the plug receptacle.

  The cord-connected multi-tap 3 has a concave portion 37 as a “second fitting portion” in the front in the Y direction as the “other side”. The concave portion 37 is configured to fit with the convex portion 16 of the plug-in type multi-tap 1. And the recessed part 37 is a site | part which performs the retaining function in the Y direction of the insertion type multi tap 1 with respect to the cord connection type multi tap 3 especially. As shown in FIGS. 5 and 6, the concave portion 37 is formed to be recessed backward in the Y direction from the cord-side front wall portion 33 in the rectangular parallelepiped structure of the cord-connected multi-tap 3. From another viewpoint, the concave portion 37 is formed as a missing portion in a rectangular parallelepiped shape extending upward from the lower end in the Z direction at the front end of the bottom portion 31 in the Y direction. The multi-tap combination body 100 can easily form a fitting structure by the convex part 16 and the concave part 37 having a relatively simple configuration.

  The recessed part 37 should just be formed in the same or slightly big dimension with respect to the convex part 16. FIG. Accordingly, the convex portion 16 is not caught during the fitting with respect to the concave portion 37, and conversely, the convex portion 16 and the concave portion 37 are not loosened after fitting and do not become rattle.

  The concave portion 37 is a space surrounded by the front end surface portion 38, the upper surface portion 39 as a “planar portion”, and the two side surface portions 40, 40. The distal end surface portion 38, the upper surface portion 39, and the two side surface portions 40, 40 are the distal ends of the convex portion 16 of the plug-in type multi-tap 1 when the plug-in type multi-tap 1 and the cord connection type multi-tap 3 are connected. It is comprised so that the surface part 18, the upper surface part 19, and the two side surface parts 20 and 20 may be opposed.

  The front end surface portion 38 extends between the rear ends of the two side surface portions 40 and 40 along the X direction and the Z direction.

  As shown in FIG. 6, the upper surface portion 39 has the upper end in the Z direction of the front end surface portion 38 and the two side surface portions 40, 40 in the region surrounded by the front end surface portion 38 and the two side surface portions 40, 40. It extends along the XY plane so as to be tied.

  The bottom portion 31 is provided with a pair of blade receiving holes 41 penetrating the upper surface portion 39 in the Z direction. The blade receiving hole 41 is a part into which the plug stopper blade 21 of the plug-in type multi-tap 1 is inserted as a plug receiver that receives supply of commercial power. As shown in FIG. 6, the pair of blade receiving holes 41 are formed in the region of the recess 37 in plan view. As shown in FIG. 6, the pair of blade receiving holes 41 are formed so that rectangular through-holes extend in parallel to each other along the Y direction when viewed from the bottom longer in the Y direction with respect to the X direction. . Inside the cord connection type multi-tap 3, a pair of blade receptacles 36 attached to the tip of the cord 30A is disposed corresponding to the pair of blade receptacle holes 41 (see FIG. 6).

  The pair of blade receiving holes 41 are configured to accommodate a pair of plug stopper blades 21 extending in the Z direction. As described above, the pair of plug stopper blades 21 are formed in the region of the convex portion 16 in a plan view, and the pair of blade receiving holes 41 are formed in the region of the concave portion 37 in a plan view. For this reason, foreign matter such as dust can be prevented from entering between the plug stopper blade 21 and the blade receiving hole 41 by the fitting structure of the convex portion 16 and the concave portion 37.

  Between both of the plug-in type multi-tap 1 and the cord-connected multi-tap 3 after being connected, the load in the extension direction of the cord 30A, that is, the tension in the Y direction (the direction away from each other) is most likely to act. On the other hand, the pair of blade receiving holes 41 is configured to accommodate a pair of plug stopper blades 21 inserted and removed in the Z direction. That is, the blade receiving hole 41 penetrates so as to extend in a direction intersecting with the direction extending from the rear side to the front side in the Y direction of the housing 30B. In other words, in the multi-tap combination body 100, the insertion / extraction direction of the plug plug blade 21 intersects the Y direction of the tensile load generated between the cord connection type multi-tap 3 and the plug-in type multi-tap 1. It is comprised so that. For this reason, the multi-tap combination body 100 acts as an insertion / extraction force of the plug plug blade 21 in the Z direction even if an external force such as pulling in the Y direction acts on the cord-connected multi-tap 3 in particular. The plug stopper blade 21 is not easily removed from the blade receiving hole 41.

  When the plug-in type multi-tap 1 and the cord connection type multi-tap 3 are connected, the upper surface part 39 is positioned to be the same or slightly above the upper surface part 19 of the plug-in type multi-tap 1 in the Z direction. It suffices if it is formed. As a result, when the plug-in type multi-tap 1 and the cord connection type multi-tap 3 are coupled, the plug plug blade 21 is securely inserted into the blade receiving hole 41, and the integrated multi-tap combination body 100 has a rectangular parallelepiped shape. It is possible to prevent a portion protruding from the structure in the Z direction from being formed.

  From another viewpoint, when the plug stopper blade 21 is completely inserted into the blade receiving hole 41, the lower surface portion 17 of the convex portion 16 is flush with the cord-side lower wall portion 35 of the cord-connected multi-tap 3. It can be. The multi-tap combination body 100 is configured in this manner, so that the insertion-type multi-tap 1 and the cord-connected multi-tap 3 are imperfect by seeing the floating of the lower surface part 17 with respect to the cord-side lower wall part 35. It is possible to determine whether or not both the fitting states are complete. And according to such a structure, the multitap combination body 100 discriminate | determines the inclination by the front side and the rear side in the Y direction of the plug-in type multitap 1 and the cord connection type multitap 3 which are connected. It's easy to do.

  The blade receiving hole 41 should just be comprised by the shape corresponding to the plug stopper blade 21. FIG. Therefore, the blade receiving hole 41 may have various shapes used around the world, such as a bipolar plug and a cylindrical plug that are not parallel to each other, like the plug stopper blade 21. Further, the blade receiving hole 41 may be configured by three or more including a ground electrode and the like.

  The two side surface portions 40, 40 extend along the Y direction and the Z direction, respectively. As shown in FIG. 6, the distance between the two side surface portions 40, 40 is the distance between the cord side lateral wall portions 34, 34 of the cord connection type multi-tap 3 (length in the X direction (short direction)). It is formed smaller than.

  The two side surfaces 40, 40 move along the two side surfaces 20, 20 of the plug-in type multi-tap 1 when the cord-connected multi-tap 3 is connected to the plug-in type multi-tap 1. It is configured as follows. Similarly, the tip surface portion 38 is configured to move along the tip surface portion 18 of the plug-in type multi-tap 1 when the cord-connected multi-tap 3 is coupled to the plug-in type multi-tap 1. Yes. That is, in the multi-tap combination body 100, when the cord-connected multi-tap 3 is connected to and disconnected from the plug-in multi-tap 3, the three surfaces of the concave portion 37 are along the three surfaces of the convex portion 16. It is configured to be inserted and removed.

  For this reason, since the multi-tap combination 100 is guided so that the cord-connected multi-tap 3 is adjusted to the correct position by the three opposing surfaces, especially when the multi-tap 1 is connected to the plug-in multi-tap 1, Easy to connect correctly and securely. Therefore, when the multi-tap combination body 100 inserts the plug plug blade 21 of the plug-in type multi-tap 1 into the blade receiving hole 41 of the cord connection type multi-tap 3, the plug-in type multi-tap 1 is particularly in the Y direction. It is difficult to incline between the front side and the rear side. Therefore, since the multi-tap assembly 100 is not inclined when the plug-in type multi-tap 1 is inserted into the cord-connected multi-tap 3, the periphery of the plug plug blade 21, the blade receiver 36, the blade receiving hole 41, and the like are damaged. Hateful.

  Engagement shafts 42, 42 as “second engagement portions” are formed on the two side surface portions 40, 40, respectively. The engagement shafts 42, 42 are crossed with both connecting directions (insertion / extraction direction of the plug plug blade 21) during and after the connection of the plug-in type multitap 1 and the cord connection type multitap 3, particularly the Y direction. It is a part that fulfills the function of restricting displacement from each other.

  As shown in FIG. 6, each of the meshing shafts 42 and 42 protrudes in a direction approaching each other in the X direction from the two side surface portions 40 and 40 in a plan view, and has a longer rectangular shape in the Y direction than the X direction. Is formed. Each of the engagement shafts 42 and 42 is formed from the upper end to the lower end in the Z direction of the concave portion 37, and has a shape protruding in a rectangular parallelepiped shape along the Z direction.

  The meshing shafts 42, 42 extend along the insertion / extraction direction of the plug stopper blade 21 with respect to the blade receiving hole 41. The engagement shafts 42 and 42 are configured to engage with the engagement grooves 22 and 22 during and after the connection of the plug-in type multi-tap 1 and the cord connection type multi-tap 3, respectively. The engagement shafts 42, 42 are engaged with the engagement grooves 22, 22 so that they are not displaced in the Y direction during the connection between the plug-in type multi-tap 1 and the cord connection type multi-tap 3 so that they are in the correct positions. Function.

  The engagement shafts 42 and 42 and the engagement grooves 22 and 22 extend in a direction intersecting with the Y direction of the tensile load generated between the plug-in type multi-tap 1 and the cord connection type multi-tap 3. For this reason, even if an external force such as pulling acts on the cord-connected multi-tap 3 particularly in the Y direction, the multi-tap combination body 100 is extended by the engagement shafts 42 and 42 and the engagement grooves 22 and 22. It does not occur in the direction, that is, the insertion / extraction direction of the plug stopper blade 21 with respect to the blade receiving hole 41, and the plug stopper blade 21 is configured to be more difficult to be removed.

  Further, when the multi-tap combination 100 is subjected to an external force in the Y direction after the plug-in type multi-tap 1 and the cord connection type multi-tap 3 are connected, the engagement shafts 42, 42 contact the engagement grooves 22, 22. This prevents the plug stopper blade 21 and the blade receiving hole 41 from being stressed. Therefore, the multi-tap combination body 100 can prevent defects such as heat generation by preventing contact failure between the plug stopper blade 21 and the blade receiver 36.

  The two side surface portions 40, 40 each have a structure expansion as the “housing 30B” at the back (both outer ends in the X direction), and both the concave portion 37 and the cord-connected multi-tap 3 in the X direction. Wall portions 43 and 43 are formed to separate the outside from each other. The wall portions 43 and 43 protrude downward along the extending direction of the blade receiving hole 41 from the upper surface portion 39 with the concave portion 37 sandwiched from both outer sides in the X direction. As described above, the multi-tap combination body 100 includes the wall portions 43 and 43 in the cord-connected multi-tap 3 so that the connected convex portion 16 is located on the inner side in the X direction with respect to the wall portions 43 and 43. The two side portions 20 and 20 are not exposed. For this reason, the plug-in type multi-tap 1 does not come off from the cord-connected multi-tap 3 when a finger or the like hits the side parts 20, 20 unintentionally.

  The cord connection type multi-tap 3 has two raceway grooves 44, 44 that extend from the bottom portion 31 to the lid portion 32 and are L-shaped in plan view. The raceway grooves 44 and 44 are portions that guide the correct position when the plug-in type multi-tap 1 is connected to the cord-connected multi-tap 3. As shown in FIG. 6, the track grooves 44, 44 are grooves recessed upward in the Z direction and extend rearward from the cord side front wall portion 33, and from the respective rear ends in the X direction (of the cord-connected multi-tap 3. It is bent and extended outward in the short direction. The track grooves 44, 44 are formed with dimensions that are slightly larger than the projecting pieces 23, 23 of the plug-in type multi-tap 1 in a bottom (planar) view.

  The track grooves 44, 44 extend along the insertion / extraction direction of the plug stopper blade 21 with respect to the blade receiving hole 41. The track grooves 44 and 44 are configured to engage with the protruding pieces 23 and 23 during and after the connection of the plug-in type multi-tap 1 and the cord connection type multi-tap 3, respectively.

  As shown in FIG. 5, both the raceway grooves 44, 44 extend from the lower end in the Z direction of the bottom portion 31 toward the upper portion of the lid portion 32, and are formed up to the middle of the lid portion 32 in the vertical direction. Yes. That is, the raceway grooves 44, 44 are not formed in the upper region of the lid portion 32, like the projecting pieces 23, 23. The raceway grooves 44 and 44 are formed up to the upper side in the Z direction with respect to the projecting pieces 23 and 23. Thus, even if the multi-tap combination 100 is in a state in which the plug-in type multi-tap 1 and the cord connection type multi-tap 3 are completely connected, the projecting piece upper end 25 which is the upper end of the projecting pieces 23 and 23 is provided. The raceway grooves 44 and 44 are configured not to contact each other.

  When the cord-connected multi-tap 3 is connected to the plug-in type multi-tap 1, the projecting pieces 23 and 23 and the raceway grooves 44 and 44 are guided so as to slide with respect to each other and to be fitted at a correct position. be able to. Further, the projecting pieces 23 and 23 and the raceway grooves 44 and 44 can receive an external force when the plug-in type multi-tap 1 and the cord connection type multi-tap 3 are connected. Therefore, the multi-tap combination body 100 can disperse the stress generated in the engagement grooves 22 and 22 and the engagement shafts 42 and 42 by having the projecting pieces 23 and 23 and the raceway grooves 44 and 44.

Modified example

  In the embodiment, an example in which one cord connection type multi-tap 3 and one plug-in type multi-tap 1 are connected is shown. However, it is also possible to adopt a configuration in which a plurality of plug-in type multi-tap 1 are connected in a daisy chain to one cord-connected type multi-tap 3. This can be realized, for example, by deforming so as to provide a concave portion 37 similar to that of the cord-connected multi-tap 3 at the front end in the Y direction of the bottom 11 of the plug-in multi-tap 1. The thus modified plug-in multi-tap 1 is configured as a relay connector, and the plug-in multi-tap 1 connected thereto is configured as a terminal connector. These relay connector and terminal connector All constitute a branching connector. As a result, the commercial power supply can be branched and connected to a larger number of electrical devices.

  In the embodiment, the plug-in type multi-tap 1 has the convex part 16 as the “first fitting part”, and the cord-connected multi-tap 3 has the concave part 37 as the “second fitting part”. An example in which is formed is shown. However, the “first fitting portion” and the “second fitting portion” may have any shape that can be fitted to each other, and the convex portion 16 and the concave portion 37 may be provided in reverse. Accordingly, the multi-tap combination body 100 can be configured such that the plug stopper blade 21 does not protrude from the rectangular parallelepiped structure (the plug stopper blade 21 is accommodated in the region of the recess 37).

  Furthermore, in the said embodiment, the convex part 16 and the recessed part 37 showed the example of a rectangular parallelepiped structure. However, the convex part 16 and the recessed part 37 do not need to be a rectangular parallelepiped shape, and may have a columnar or polygonal column structure, for example.

  In the embodiment, the plug-in type multi-tap 1 has the engagement grooves 22 and 22 as “first engagement portions”, and the cord connection type multi-tap 3 has an engagement shaft as “second engagement portion”. An example in which 42 and 42 are formed is shown. However, the “first meshing portion” and the “second meshing portion” may have any shape that meshes with each other, and the meshing grooves 22 and 22 and the meshing shafts 42 and 42 may be provided in reverse. .

  Furthermore, in the said embodiment, the meshing groove | channels 22 and 22 and the meshing shafts 42 and 42 both showed the example of the L-shaped structure by planar view. However, the engagement grooves 22 and 22 and the engagement shafts 42 and 42 do not need to be L-shaped, and can be formed in a hook-like or crank-like structure, for example.

1 Plug-in type multi-tap (branch connector, wiring connector)
3 Cord connection type multi-tap (Connector for extension with cord, Plug connector for wiring)
10 housing (first housing)
DESCRIPTION OF SYMBOLS 11 Bottom part 12 Cover part 13 Insertion side rear wall part 14 Insertion side horizontal wall part 15 Insertion side lower wall part 16 Convex part (1st fitting part)
17 Lower surface portion 18 Front end surface portion 19 Upper surface portion 20 Side surface portion 21 Plug plug blade 22 Engagement groove (first engagement portion)
23 Projection piece 24 Lid upper end portion 25 Projection upper end portion 26 Stepped portion 27 Blade receiving hole 30A Code 30B Case (second case)
31 Bottom portion 32 Lid portion 33 Cord side front wall portion 34 Cord side lateral wall portion 35 Cord side lower wall portion 36 Blade holder 37 Recessed portion (second fitting portion)
38 Tip surface 39 Upper surface (planar surface)
40 Side part 41 Blade receiving hole 42 Engagement shaft (second engagement part)
43 Wall 44 Track groove 100 Multi-tap combination (wiring plug connector)

Claims (7)

A first housing;
A plug blade located on one side of the first housing;
A plurality of blade receivers that are spaced apart from the one side toward the other side of the first housing and electrically connected to the plug plug blades,
In the branch connector comprising a plurality of blade receiving holes provided corresponding to the plurality of blade receivers,
On the one side, there is a first fitting portion that fits with an extension connector with a cord that connects the plug plug blade,
The plug plug blade is provided in the first fitting portion and extends in a direction intersecting with a direction extending from the one side to the other side,
The first housing has a pair of track grooves on the one side of the extension connector with cord so as to stop the movement in the direction in which the extension connector with cord is separated toward the one side. Each having a pair of L-shaped projecting pieces extending in a direction intersecting with a direction extending from the one side to the other side, and extending from the other side to the one side;
The first fitting portion has a first meshing portion that meshes with the extension connector with cord in a state of meshing with the protruding piece,
The first engagement portion extends along a direction in which the plug plug blade extends,
Each of the pair of L-shaped projecting pieces extends along a direction in which the plug plug blade extends, and is inserted into the track groove formed with a size larger than the projecting piece. The branching connector is characterized in that the extension connector with cord is slid and guided so as to be fitted at a correct position.
The branch connector according to claim 1, wherein the first fitting portion is a convex portion protruding from the first housing toward the one side.
3. The branch connector according to claim 1, wherein a step portion is provided between the first housing and the protruding piece at an end in an extending direction of the plug plug blade.
A second housing;
A cord that extends from one side of the second casing and supplies power;
A blade receiver located on the other side of the second housing and electrically connected to the cord;
A blade receiving hole provided corresponding to the blade receiver,
In the extension connector with a cord fitted to the branch connector according to any one of claims 1 to 3,
On the other side, it has a second fitting part that fits with the first fitting part that has the plug plug blade connected to the blade receiver,
The blade receiving hole is provided in the second fitting portion and penetrates so as to extend in a direction intersecting with a direction extending from the one side to the other side. Connector.
The second fitting portion has a flat portion,
The blade receiving hole is formed so as to penetrate the flat portion,
5. The extension connector with cord according to claim 4, wherein the second fitting portion is a recess having a bottom surface of the flat portion recessed from the second housing toward the one side.
The extension connector with a cord according to claim 5, further comprising a wall portion sandwiching the concave portion from both outer sides and projecting along a direction in which the blade receiving hole extends.
The second fitting portion has a second engagement portion that engages with the branch connector,
The extension connector with a cord according to any one of claims 4 to 6, wherein the second engagement portion extends along a direction in which the blade receiving hole extends.

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