HK1021447B - Harness plug - Google Patents

Description

Electrical wiring plug

The present invention relates to an electrical wiring plug which is mounted on the front end of a power supply line and is used in common with an electrical wiring connector on the receiving side of a general structure in order to connect the power supply line by a terminal method.

The electric wiring plug is a device in which a concave portion for fitting a receiving side electric wiring connector is formed in a front surface of a housing, core wires extending into a plurality of lead wires in an inner surface of the concave portion are connected to front ends of a plurality of blades, respectively, and receiving blade springs provided in the electric wiring connector are inserted into the fitting blades, respectively, to perform electric connection.

However, in the conventional wiring plug, since the lead is connected to the root of the blade by caulking, the replacement operation of the lead is troublesome when the lead length cannot be matched at the site, and there is a problem that the workability is poor. Further, since the electrical characteristics and the use of the electrical wiring plug are not specified, the electrical characteristics and the use of the electrical wiring plug must be read from a wiring pattern or the like during wiring work and maintenance, and there is a problem of poor workability.

In order to overcome the above problems, the present invention provides an electric wiring plug with improved workability.

In order to achieve the above object, a wire harness plug according to the present invention is configured such that a recess for fitting a receiving-side electrical wiring connector is formed in a front surface of a housing, leading end portions of a plurality of blades are inserted into the recess, core wires of a plurality of lead wires are connected to rear end portions of the blades, respectively, and a display portion for displaying information necessary for electrical wiring is provided on a surface of the housing.

In the present invention, the display unit is a name display unit for displaying a purpose and a name.

In the present invention, the recess is provided with a wrong connection preventing portion for preventing reverse insertion into the recess or connection of an electric wiring connector having a different nominal value and application.

In the present invention, the housing is composed of a case and a cover, a plurality of fixing grooves for fixing the center portions of the blades are formed in the inner walls of the case and the case facing the direction of fitting the electric wiring connector into the recess, a housing chamber for housing the root portions of the blades is formed in the housing, and blade fixing portions for temporarily fixing the blades are provided on the bottom surface of the housing chamber and the blades.

In the present invention, the insert fixing portion is a temporary fixing structure in which the insert is temporarily fixed by fitting projections and recesses.

Further, in the present invention, a locking body made of a flexible material for preventing falling off when the electric wiring connector is connected is provided on the housing, and a locking claw for locking in a locking groove formed in the recess by protruding the opening formed in the housing to the outside of the electric wiring connector insertion portion is formed at the front end of the locking body, and a locking piece for elastically locking the opening edge of the opening and maintaining a certain protruding state in the recess of the locking claw is provided.

In the present invention, the housing is formed of a plurality of shells, and the locking body is formed of a plurality of locking bodies, and the shells are formed of a plurality of shells, and the shells are assembled to each other.

Further, in the present invention, the housing is composed of a case body and a case cover, the case cover is composed of a front cover covering the periphery of the insertion piece and a rear cover covering the portion of the case body, the case body and the rear cover are formed of a leakage-resistant synthetic resin, and the front cover is formed of a synthetic resin having elasticity.

In the present invention, the end portion of the front cover locked to the housing is held between the rear cover and the housing, and the rear cover is detachably attached to the housing.

Another electrical wiring plug according to the present invention is characterized in that a recess for fitting a receiving-side electrical wiring connector is formed in a front surface of a housing, front end portions of a plurality of blades are inserted into the recess, core wires of a plurality of wires are connected to rear end portions of the blades, wire insertion openings into which the core wires of the wires are inserted are formed in the rear end portion of the housing, contact pieces which come into contact with the core wires of the wires inserted from the wire insertion openings are formed in root portions of the blades, a plurality of locking springs for elastically clamping the core wires between the contact pieces and a release button for releasing the elastically clamped core wires by pressing the locking springs away from the contact pieces are provided, and an operation portion for operating the release button is exposed on a surface of the housing.

In the above-described another aspect of the present invention, the operation portion is formed in a size that can be operated by hand.

In the above-described another aspect of the present invention, the recess is provided with a miswire prevention portion for preventing reverse insertion into an inner surface of the recess or connection of an electrical wiring connector different in nominal value and use.

In the above-described another aspect of the invention, the housing is composed of a case and a cover, a plurality of fixing grooves for fixing the center portions of the tabs are formed in the inner walls of the case and the cover facing the terminal fitting direction of the recessed portion, a housing chamber for housing the root portions of the tabs is formed in the housing, and tab fixing portions for temporarily fixing the tabs are provided on the bottom surface of the housing chamber and the tabs.

In the above-described another aspect of the present invention, the insert fixing portion is a temporary fixing structure in which an insert is temporarily fixed by being fitted in a concave-convex manner.

In addition, in the present invention, a locking body made of a flexible material for preventing falling off when the electric wiring connector is connected is provided on the housing, and a locking claw for locking in a locking groove formed in the recess by protruding the opening formed in the housing to the outside of the electric wiring connector insertion portion is formed at the front end of the locking body, and a locking piece for elastically locking the opening edge of the opening and keeping a certain protruding state in the recess of the locking claw is provided.

In the above-described another aspect of the invention, the housing and the case cover are configured such that a fixing portion formed by elastically fitting the locking body in a concave-convex manner is formed on one of the housing and the case cover constituting the housing, a temporary fixing portion for temporarily fixing the locking body is formed, and a holding portion for holding the temporary fixing portion of the locking body is formed between the housing and the case cover when the case cover and the housing are combined.

In another aspect of the present invention, the housing is composed of a case and a cover, the case cover is composed of a front cover covering the periphery of the insertion piece and a rear cover covering the portion of the case, the case and the rear cover are made of a synthetic resin having a resistance to leakage, and the front cover is made of a resin having an elasticity.

Finally, in another aspect of the present invention, the rear cover sandwiches an end portion of the front cover locked to the housing between the housing and the rear cover, and is detachably attached to the housing.

The present invention will be described below with reference to the accompanying drawings and examples.

Fig. 1 is an exploded perspective view of an electrical wiring plug of embodiment 1.

Fig. 2 is an exploded perspective view of the electrical wiring plug as in the above.

Fig. 3 is a cross-sectional view of the same electrical wiring plug.

Fig. 4 is an exploded perspective view of an electrical wiring connector corresponding to the above.

Fig. 5 is a perspective view of the electrical wiring connector.

Fig. 6 is an explanatory diagram of a floor wiring system using the same electric wiring plug as above.

Fig. 7 shows the erroneous connection preventing unit as above, where (a) is a front view of the electric wiring plug, and (b) is a front view of the electric wiring connector.

Fig. 8 shows the erroneous connection preventing unit as above, where (a) is a front view of the electric wiring plug, and (b) is a front view of the electric wiring connector.

Fig. 9 shows the erroneous connection preventing unit as above, where (a) is a front view of the electric wiring plug, and (b) is a front view of the electric wiring connector.

Fig. 10 shows the erroneous connection preventing unit as above, where (a) is a front view of the electric wiring plug, and (b) is a front view of the electric wiring connector.

Fig. 11 shows the erroneous connection preventing unit as above, where (a) is a front view of the electric wiring plug, and (b) is a front view of the electric wiring connector.

Fig. 12 shows the erroneous connection preventing unit as above, where (a) is a front view of the electric wiring plug, and (b) is a front view of the electric wiring connector.

Fig. 13 is an explanatory view explaining a method of temporarily fixing the blades of the above-described wire harness plug.

Fig. 14 is a main portion sectional view of the same electrical wiring plug.

Fig. 15(a) is a main part sectional view of a temporary fixing structure of the locking body. (b) Is a main part sectional view of a state where the locking body is fixed.

Fig. 16 is an exploded perspective view of the electrical wiring plug of embodiment 2.

Fig. 17 shows an electrical wiring plug of embodiment 3, (a) is a front view; (b) is a side view; (c) is a side sectional view with a part omitted.

In the figure, 11-electric wiring plug, 13-housing, 13 a-housing, 13 b-housing cover, 14-recess, 15' -blade, 15 a-contact piece, 19-recess, 20-locking spring, 21-release button, 21 a-release portion, 21 b-operating handle, 50-indication portion.

Example 1

An electrical wiring plug of embodiment 1 of the present invention is explained below with reference to fig. 1 to 15.

An electrical wiring connector 10 and an electrical wiring plug 11 are respectively mounted on the front end of the power cord for connecting the power cord in a terminal manner.

The harness plug 11 has a recess 14 formed in the front surface of the housing 13 to be fitted to the receiving-side electrical wiring connector 10, and a plurality of blades 15, 15' for connecting the core wires of the plurality of lead wires are provided in the recess 14 so that the front end faces the opening of the recess 14.

The housing 13 of the harness plug 11 is composed of a synthetic resin case 13a and a case cover 13 b. The housing 13a is formed in a substantially box shape with an open upper surface and a front surface, the interior thereof is divided into front and rear spaces by a partition wall 16, and a recess 14 into which an insertion portion 30 (see fig. 4 and 5) of the electrical wiring connector 10 is inserted is formed by a recess 14a formed in the front. A fixing groove 17 for press-fitting and fixing 3 insertion pieces 15 and 15 ' is formed in the partition wall 16, and, for example, the insertion pieces 15 and 15 ' are fitted to the fixing groove 17, that is, the tip portions of the insertion pieces 15 and 15 ' are arranged in the recess 14 a. Then, the internal space at the rear of the housing 13a is further divided into three housing chambers by 2 partition walls 18 leading in the longitudinal direction of the housing 13a, and the blades 15 and 15' are housed in the housing chambers, respectively. A lead insertion opening is formed at the rear end of the housing 13a in combination with the housing cover 13 b. The inner diameter of the wire insertion opening of each recess 19 is reduced, and the core wire inserted into the wire insertion opening is positioned at a predetermined position between the contact piece 15a of the insertion piece 15, 15' and the lock spring 20.

The tabs 15, 15' are formed in a plate shape from a conductive material, and a base portion is bent to contact one inner side of each housing chamber, and a contact piece 15a for contacting the core wire at the lower surface is formed at the base portion from only the lateral direction of the cover 13b side. A pair of temporary fixing pieces 15b for temporarily fixing the housing 13a are provided so as to protrude from the lower surfaces of the center portions of the inserting pieces 15 and 15'. As shown in fig. 3, a rib 55 is provided so as to protrude from the bottom surface of the temporary fixing piece 15b corresponding to each housing chamber separated by the partition wall 18 of the housing 13a, and the rib 55 is press-fitted into a claw formed at the inner end of each temporary fixing piece 15b to temporarily fix the tabs 15 and 15 'to the housing 13a, whereby the temporary fixing pieces 15b and 15' of the tab fixing portion are fitted into the rib 55 in a concave-convex manner to temporarily fix the tabs 15 and 15 'to the housing 13a, whereby the mounting state of the tabs 15 and 15' can be stabilized, and the assembly work of the housing 13a and the housing cover 13b of the housing 13a can be easily performed. As shown in fig. 13, a temporary fixing piece 15b ' formed of a projection having claws formed at both lower ends thereof may be formed on the insertion pieces 15 and 15 ', a rib 55 ' formed of two convex strips 55a may be formed on the inner bottom surface of the housing 13a, and the temporary fixing piece 15b ' may be fitted between the ribs 55 '.

However, the three tabs 15, 15 'have a configuration in which the tab 15' of the ground wire connected to the lead protrudes forward longer than the other tabs 15, or can be mounted forward. In this way, when the other blades 15 are connected to the receiving locking springs of the electrical wiring connector 10, the first blade 15 'connected to the ground wire is connected to the receiving locking spring of the electrical wiring connector 10, and when the blades are pulled out in the reverse direction, the first blade 15' connected to the ground wire is finally detached, thereby ensuring safety.

Between the contact piece 15a of each of the blades 15 and 15' and the rear end of each of the housing chambers of the housing 13a divided into three, a lock spring 20 is disposed for elastically contacting the core wire of the lead wire to the contact piece 15 a.

The housing cover 13b has a substantially box-shaped inner structure having an opening on the lower surface and the front surface, which is substantially the same as the structure of the housing 13a, and has insertion holes for inserting the hollow rivets 26 formed in the upper two positions, and the housing cover 13b is configured to be attached to the housing 13a by inserting the hollow rivets 26 into the insertion holes 27 and the insertion holes 28 formed in the housing 13a corresponding to the insertion holes 27 and caulking the tips thereof.

A convex portion 22 serving as an erroneous connection preventing portion that leads along an insertion direction of an electric wiring connector 10 inserted into a reverse insertion preventing groove 34 (see fig. 5) of the electric wiring connector 10 described later is formed on an inner bottom surface of a concave portion 14b of a housing cover 13b that forms a concave portion 14 together with a concave outer portion 14a of a housing 13a, whereby the reverse insertion or the erroneous connection of the electric wiring connector 10 having a different nominal value and application can be prevented.

Here, in order to prevent the electrical wiring plug 11 from coming off the electrical wiring connector 10, the electrical wiring connector 10 is provided with a locking body 23 formed of a flexible synthetic resin material which is formed in a locking groove 35 formed so as to be capable of locking and unlocking, and the locking body 23 is provided on the side of the housing cover 13 b. In the case of the conventional harness plug 11, the same components as the lock body 23 are provided on the side of the housing 13a, but in this case, the harness plug 11 is made large in shape, and the lock body 23 is provided only on the side of the housing cover 13b in the embodiment of the present invention, so that the harness plug 11 can be made small in size.

In order to attach the lock body 23 to the cover 13b, an attachment member 24 of the lock body 23 is formed on the upper surface of the cover 13b in a recessed center portion. An opening 25 is formed in a portion corresponding to the recess 14b of the mounting portion 24, and the locking claw 23a of the locking body 23 has a structure protruding in the recess 14 from the opening 25. A fixing portion 24a for fixing the locking body 23 is formed at the rear of the opening portion 25. Here, as shown in fig. 14, a fixing piece 23b having a substantially L-shaped cross section from the center lower surface is provided vertically on the lock body 23, and two fixing claw pieces 23c elastically locked to the case cover 13b are provided vertically on the lower surface of the fixing piece 23 b. Then, a locking piece 23e that is elastically locked to the case cover 13b is formed on an upper portion of the distal end surface where the locking claw 23a is formed. Further, a slip prevention groove 23d composed of a plurality of laterally extending convex strips is formed on the upper surface of the lock body 23 when the lock body 23 is released by finger operation.

In the mounting portion 24 of the case cover 13b to which the lock body 23 is mounted, an insertion hole 24b into which the fixing claw piece 23c is inserted is formed in the fixing portion 24a, and the lock body 23 is mounted on the mounting portion 24 by locking the fixing claw piece 23c in the insertion hole 24 b. The rear portion of the fixing portion 24a is formed larger than the pressing operation portion 23d of the lock body 23, and the pressing operation portion 23d can be pressed with a finger. That is, the pressing operation portion 23d of the lock body 23 is pressed downward, the locking claw 23a side is rotated upward with the fixing piece 23b as a fulcrum, the locking claw 23a is disengaged from the locking groove 35 formed in the insertion portion 30 of the electric wiring connector 10, and the electric wiring plug 11 is disengaged from the electric wiring 10. Further, a surface of the pressing operation portion 23d is formed with a non-slip groove in the lateral direction.

The mounting to the mounting portion 24 of the lock body 23 is performed as follows. First, as shown by the broken line in fig. 15(a), the fixing claws 23c of the locking body 23 are inserted into the holes 24b, and then the elastic pieces 23b are placed on the fixing portions 24a as to lock the rear end faces to the rear portions of the fixing portions 24a, whereby the locking body 23 can be fixed to the case cover 13b by locking the claws formed on the front faces of the lower portions of the fixing claws 23c to the opening edges inside the insertion holes 24 b. Here, in the case of the present embodiment, a larger interval is formed from the rear end surface of the fixing piece 23b to the front surface of the root portion of the fixing claw piece 23c than the interval L between the rear end portion of the fixing portion 24a and the opening edge on the front side of the insertion hole 24b in fig. 15. The front portion of the fixing portion 24a gives a forward elastic force to the lateral piece of the fixing piece 23b, and thereby the fixing claw piece 23c is firmly locked. Further, a projection 56 is formed on the rear surface of the partition wall 16 of the housing 13a, the case cover 13b for temporarily fixing the lock body 23 is coupled to the housing 13a, and the lower portion of the locking claw piece 23c is held between the projection 56 and the partition wall 57 of the case cover 13b corresponding to the partition wall 16 of the housing 13a, whereby the lock body 23 is fixed. That is, in the present embodiment, the fixing piece 23b and the fixing claw piece 23c constitute the lock body 23, and the fixing portion 24a and the insertion hole 24b are elastically fitted to the fixing portion of the lock body 23 in a concave-convex manner to constitute a temporary fixing portion for temporarily fixing the lock body 23, and when the partition wall 57 and the convex portion 56 are combined with the case body 13a and the case cover 13b, a holding portion for holding the fixing portion of the lock body 23 is constituted. Therefore, when the case 13a and the cover 13b are combined, the locking body is temporarily fixed to the housing by the temporarily fixing portion, so that the combining operation of the case 13a and the cover 13b can be easily performed, and when the case 13a and the cover 13b are combined, the locking body can be fixed by clamping the locking body by the clamping portion.

Here, as shown in fig. 13, the locking piece 23e is locked at the opening edge on the front side of the opening 25, the protruding amount of the locking claw 23a into the concave portion 14 is limited, the locking claw 23 can face into the concave portion 14 in a certain state, the locking claw 23a is pressed downward (the housing 13a side) through the front face of the insertion portion 30 of the electric wiring connector 10, and the electric wiring connector can be inserted in a certain state. Further, since the locking piece 23e is elastically locked to the opening edge of the opening 25, the locking piece 23e is closely attached to the opening edge of the opening 25, and the amount of hooking of the locking claw 23a to the locking groove 35 of the electronic wiring terminal 10 is constant, so that the falling-off prevention can be surely performed.

Here, a quick connection type connection portion including the contact piece 15a of the insertion piece 15 and the lock spring 20 will be described with reference to fig. 1 and 3. The locking piece 20a and the contact piece 20b of the locking spring 20 are formed by bending both end portions of a strip plate of an elastic conductive material to form both end portions of a center piece 20 c. The locking piece 20a is inclined from the direction in which the connecting portion with the center piece 20c faces the front end edge toward the lower surface of the contact piece 15a of the insert piece 15, the contact piece 20b is bent in a nearly S-shape, and the locking piece 20a and the contact piece 20b provided on the locking spring 20 are opposed to each other below the contact piece 15a of the insert piece 15. Further, the contact piece 15a of the insert 15 is provided with a notch 15 c.

However, when the cover 16b is coupled to the housing 13a, the release button 21 for releasing the elastic clamping state of the core wire at a position corresponding to the core wire quick-connection portion composed of the lock spring 20 and the contact piece 15a is housed. A recess 29a is formed in a portion of the case cover 13b on the side opposite to the recess 14, the recess 29a and the inside of the case 13 are communicated through the opening 29, and the release button 21 is rotatably disposed in the recess 29 a. The release button 21 includes an operation handle 21a for pressing an operation portion of an operation surface having a large size with a finger, release portions 21b exposed from the notches 15c of the respective tabs 15 and coming into contact with the respective portions of the locking pieces 20a, and a fulcrum portion 21c coming into contact with the inner wall of the case cover 13b and serving as a fulcrum of the release button 21. Here, the release button 21 is exposed on the surface of the case cover 13b, and when the operation surface on the front surface of the operation handle 21a is pressed with a finger, the release button 21 pivots about the fulcrum 21c, and the pressing portion 21b of the release button 21 presses the locking piece 20a of each locking spring 20 in a direction away from the lower surface of the contact piece 15 a. As a result, the core wire of the power cord held between the 3 locking pieces 20a and the contact piece 15a can be simultaneously removed without using any special tool, and the replacement work of the lead wire can be easily performed.

In this way, the wire connecting portion to the harness plug 11 is configured to have a connecting structure having a releasing function, and the operation lever 21a of the release button 21 is formed to be manually operable, and the surface of the case cover 13b is exposed, so that the connection to the wire connecting portion can be easily removed, and for example, when the length of the wire is not suitable for replacement, the operation lever 21a of the release button 21 is operated, and the wire can be easily removed. Moreover, only the core wire of the wire to be replaced is inserted from the wire insertion opening, and the core wire of the wire is elastically sandwiched between the lock spring 20 and the contact piece 15a, whereby the wire connection and the reconnection operation are facilitated, and the wire replacement operation can be performed very easily.

When connecting the core wire of the power cord, the core wire (not shown) stripped of the outer covering of the power cord is inserted from the concave portion 19, the conductor of the core wire is sandwiched between the locking piece 20a and the contact piece 20b of the locking spring 20 and the contact piece 15a of the insertion piece 15 by the elastic force of the locking spring 20, and the conductor of the core wire is caught by the front end edge of the locking piece 20a, so that the core wire can be prevented from falling off. Therefore, only the core wire is inserted into the concave portion 19, and the electrical connection with the tab 15 can be performed while holding the core wire.

As shown in fig. 2, a recess 51 is formed on the surface of the case cover 13b corresponding to the recess 14b, a card 52 indicating the use and name of the electric wiring plug 11 is accommodated in the recess 51, and the card 52 is attached to the recess 51 by covering the card 52 with the recess 51 with a transparent cover 53 formed by a locking groove 51a formed on both end surfaces of the recess 51 and both end surfaces of a locking piece 53a which can be locked and unlocked and is detachable. Since the display section 50 for displaying the electrical nominal value and the usage of the electrical wiring plug 11 is provided on the surface of the housing 13 in this manner, the electrical nominal value and the usage of the electrical wiring plug 11 can be easily read from the display section 50, and the electrical nominal value and the usage of the electrical wiring plug 11 can be easily exchanged by exchanging the card 52 when the usage of the electrical wiring plug 11 is changed. In the present embodiment, the card 52 of the application and name is provided, but information necessary for indicating the electric wiring other than the card 52 may be provided.

Next, the electrical wiring connector 10 into which the electrical wiring plug 11 is inserted will be described. As shown in fig. 5, the electric wiring connector 10 is configured such that a plurality of receiving blade springs 32 are provided inside a socket 30 which is formed in the front surface thereof and into which a recess 14 of an electric wiring plug 11 constituting the insertion side is inserted, and the receiving blade springs 32 receive blades 15 of the electric wiring plug 11 inserted through blade insertion holes 31 formed in the front surface of the socket 30, respectively, to constitute the electric wiring connector 10.

As shown in fig. 4, the housing 33 of the electric wiring connector is composed of a synthetic resin case 33a and a case cover 33b, and insertion holes 41 through which hollow rivets 40 are inserted are formed in two positions on the upper surface of the case cover 33 b. An insertion hole 42 into which the hollow rivet 40 is inserted is formed in the housing 33a corresponding to the insertion hole 41, and the tip of the hollow rivet 40 inserted into the insertion hole 41 and the insertion hole 42 is caulked, thereby attaching the housing cover 33b to the housing 33 a.

The housing 33a is formed in a substantially box shape with an open upper surface, and when coupled with the cover 33b, the front housing portion 30a constituting the inserting portion 30 is partitioned into three housing chambers by two partition walls 36 extending in the longitudinal direction of the housing 33a, and the inserting leaf spring 32 is housed and received in each housing chamber. The partition wall 36 is formed over the entire length from the front housing portion 30a to the rear portion to receive the leaf spring 32. Therefore, a recess 31a constituting the tab insertion opening 31 is formed in the front surface portion corresponding to each of the storage chambers.

The receiving latch spring 32 is made of an electrically conductive material, and has a structure in which a pair of holding pieces 32a opposed to each other are provided so as to sandwich the male tab from both sides of the male tab 15, the holding pieces 32a are connected to a central portion, tip portions of extension pieces extending rearward from the central portion are bent so as to contact one inner side surface of each housing chamber, contact pieces 32b contacting the core wires are formed from a lateral lower surface of a case cover 33b at only a small number of the tip portions, and the latch springs 43 are disposed under the contact pieces 32 b. The holding piece 32a and the central portion are bent in a shape of a letter < i > to each other, thereby strengthening the holding force of the blades 15 of the electrical wiring plug 11. In the case of the harness end 10, a recessed portion 45 of a lead wire insertion opening into which the core wire is inserted is also formed between the lock spring 43 and the contact piece 32b at the rear end portion of the housing 33 a. Further, the inner diameter of the wire insertion opening of each recess 45 is made small, and the core wire inserted into the wire insertion opening is positioned reliably between the contact piece 32b and the lock spring 43.

The housing cover 33b has an internal structure substantially similar to that of the housing 33a, and a reverse insertion preventing groove 34 into which the protrusion 22 of the harness plug 11 is fitted and a locking groove 35 for locking the locking claw 23a of the locking body 23 are formed on the upper surface of the front receiving portion 30b forming the mating portion 30 together with the front receiving portion 30a of the housing 33 a.

Here, when the cover 33b is attached to the housing 33a, the release button 44 is accommodated in a position corresponding to the wire quick-connection portion formed by the lock spring 20 and the contact piece 15 a. The release button 44 is composed of a release portion 44a for releasing the elastic pinching state of the core wire from the contact piece 32b corresponding to each lock spring 43 and an operation handle 44b for exposing the surface of the cover 33b from an opening 46 provided at one end edge of the release portion 44a and extended at the rear end portion of the cover 33b, and the operation handle 44b is formed in a size to be manually operated. Here, when the operation handle 44b is pressed, the release button 44 is turned around the fulcrum portion 44c as a fulcrum, and the release portion 44a bends the lock piece 43a of the lock spring 43 in a direction away from the contact piece 32b, thereby releasing the elastic locking state of the core wire.

Thus, the wire connecting portions to the electrical wiring connector 10 and the electrical wiring plug 11 are formed into a snap structure having a releasing function, and when the length of the wire is not suitable and replacement is necessary, the wire can be easily removed only by operating the releasing buttons 21 and 44, and the wire can be connected by elastically sandwiching the wire between the lock springs 20 and 43 and the contact pieces 15a and 32b only by inserting the replaced wire core wire from the wire insertion opening, and the reconnection operation is easy, and the wire replacement operation can be very easily performed. Since the operation handles 21b and 44b are formed to be manually operable, the lead wire can be replaced by finger operation without using a special tool.

In connection with the electrical wiring plug 11 of the electrical wiring connector 10, the concave portion 14 of the electrical wiring plug 11 is aligned to face the mating portion 30 of the electrical wiring connector 10 as the convex portion 22 is fitted into the reverse insertion preventing groove 34, the electrical wiring plug 11 is pressed into the electrical wiring connector 10, the blades 15, 15 'are inserted into the blade insertion opening 31, and the blades 15, 15' are connected to the receiving blade spring 32. At this time, the locking claws 23a of the locking body 23 are locked in the locking grooves 35 to be prevented from falling off.

Then, when the harness plug 11 is pulled out from the electrical wiring connector 10, the pressing operation portion 23d of the lock body 23 is pressed to release the locked state of the locking claw 23a of the lock body 23 and the locking groove 35 of the plug 30, and the harness plug 11 can be pulled out from behind.

The erroneous connection preventing portion is provided in various shapes corresponding to the nominal values and the applications of the electric wiring connector 10 and the electric wiring plug 11, and the erroneous connection preventing portion of the branch cable type is shown in fig. 7 to 10, and the erroneous connection preventing portion of the trunk cable type is shown in fig. 11 and 12. The interval L1 between the plug-in tabs 15 of the misconnection connection of the branch cable type and the trunk cable type and the intervals L2 and L3 between the convex strips 22 are different, and the former is wider than the latter. The interval L1 between the erroneous-contact-connection-portion insertion pieces 15 of the 100V series and the 200V series and the intervals L2 and L3 between the convex pieces 22 are different from each other, and the former interval is wider than the latter interval.

In the product of the two-blade type having the nominal value of 20A of the branch type, as shown in fig. 7(a) (b), the two blades 15 are arranged on the left side as seen from the front in the recess 14 of the electric wiring plug 11, and the two ridges 22 are formed at the inner bottom of the recess 14b of the cover 13 b. On the other hand, 2 blade insertion ports 31 into which the two blades 15 can be inserted are provided in the front surface of the housing 33 of the electric terminal 10, and two reverse insertion preventing grooves 34 into which the two blades 22 can be inserted are formed in the upper surface of the cover 33 b.

In addition, in the product of the grounding double plug of the branch cable system nominal value 20A, as shown in fig. 8(a) and (b), three blades 15 are arranged in the recess 14 of the electrical wiring plug 11, and two convex strips 22 are formed on the inner bottom surface of the recess 14b of the housing 13 b. On the other hand, two insert insertion holes 31 into which the three inserts 15 can be inserted respectively are provided in the front surface of the housing 33 of the electric wiring connector 10, and two reverse insertion preventing grooves 34 into which the two convex strips 22 can be inserted respectively are formed in the upper surface of the cover 33 b.

In a product for a single-sided switch of a branch cable type nominal value 20A, as shown in fig. 9(a) and (b), two blades 15 are inserted and arranged on one side in a recess 14 of a harness plug 11, one ridge 22 is formed on the inner bottom surface of a recess 14b on the side where the blade 15 is not provided, and a chamfered portion 54 is formed at a corner portion of a cover 13 b. On the other hand, two insert-piece insertion holes 31 into which the two insert pieces 15 are inserted are provided in the front surface of the housing 33 of the electric wiring harness 10, reverse-insertion preventing grooves 34 into which the convex pieces 22 are fitted are formed in the upper surface of the cover 33b, and chamfered portions 55 into which the chamfered portions 54 are fitted are formed in the corner portions of the cover 33 b.

In a product for a three-way switch of a branch cable type nominal value 20A, as shown in fig. 10(a) and (b), three blades 15 are disposed in the recess 14 of the harness plug 11, and a chamfered portion 54 is formed at a corner portion of the cover 13 b. On the other hand, three blade insertion holes 31 into which the three blades 15 can be inserted are provided in the front surface of the housing 33 of the electrical wiring connector 10, and a chamfered portion 55 into which the chamfered portion 54 is fitted is formed at a corner portion of the housing 33 b.

In the product of the single-phase three-wire (two-grounding-plug) having the nominal value of 20A of the trunk cable type, as shown in fig. 11(a) and (b), the product has substantially the same shape as the product of the two-bolt having the nominal value of 20A of the branch cable type, and the interval L1 of the plug 15 and the interval L2 of the convex strip 22 are wider than the width of the product of the branch cable type.

Further, in a three-phase three-wire product of a trunk cable type nominal value 20A, as shown in fig. 12(a) and (b), a single protrusion 22 is formed on the inner bottom surface of the recess 14b of the cover 13b of the electrical wiring plug 11, and a reverse insertion prevention groove 34 into which the protrusion 22 is fitted is formed on the upper surface of the cover 33b of the electrical wiring connector 10, having substantially the same shape as that of a three-way switch product of a branch cable type. The interval L1 between the tabs 15 and the interval between the ribs 22 are wider than the width of the branch cable type product.

The wire harness plug 11 is used in a floor wiring system, for example, as shown in fig. 6. The floor wiring system forms a floor on a floor of a building at a predetermined interval, and performs plane wiring by using a space between the floor and a floor surface (the floor wiring system is collectively called a free access floor). In this floor wiring system, wiring harnesses H and I having a plurality of outlets are laid on a floor while a plurality of outlets are buried in the floor. Here, the power supply line demarcation box D of the wiring tool H, I is led under the floor. The electric wiring plug 11 is attached to the tip of the power supply line of the socket C and the wiring tool H, I, and the electric wiring plug 11 is connected to the terminal block B ' of the electric circuit L ' branched further through the terminal blocks B ' and J of the branch trunk line L0, so that the plane wiring can be freely performed. The junction box B ' of the branch trunk line L0 and the branch line L ' is provided with a connection portion for connecting the power supply trunk line L0 and the branch line L ' in a quick-connection manner, and a plurality of plug-in portions having the same configuration as the electrical wiring connector 10. When connecting a single power cord to wiring harnesses H, I, etc., or extending the power cord, an electric wiring connector 10 is attached to the power supply side, and an electric wiring plug 11 may be attached to the other.

Example 2

The housing of the electrical wiring plug 11 is configured such that the housing 13a and the housing cover 13b are fixed by caulking with two hollow rivets 26, but in the electrical wiring plug 11 of the present embodiment, as shown in fig. 16, through holes 27 into which the hollow rivets 26 are inserted are formed at four places on the upper surface of the housing cover 13b, the hollow rivets 26 are inserted into the insertion holes 27 and insertion holes 28 formed in the cover 13a corresponding to the insertion holes 27, and the tip ends thereof are caulked, and the housing 13a is joined to the cover 13b with four hollow rivets 26. Since the configurations other than the insertion holes 27 and 28 are the same as those in embodiment 1, the same components are denoted by the same reference numerals, and descriptions thereof are omitted.

Example 3

The housing 13a and the housing cover 13b constituting the housing 13 of the electrical wiring plug 11 are formed of a thermosetting resin such as a urea resin in consideration of electrical leakage resistance, but in the electrical wiring plug of the present embodiment, as shown in fig. 17(a) to (c), the housing cover 13b is formed of a front cover 13c covering the periphery of the blades 15 and a rear cover 13d covering a portion other than the front cover 13c, the front cover 13c is formed of a synthetic resin such as nylon having elasticity, and the rear cover 13d is formed of a synthetic resin such as a urea resin having electrical leakage resistance. Since the basic configuration other than the housing 13 is the same as that of the electrical wiring plug of embodiment 1, the same constituent elements are given the same reference numerals, and the description thereof is omitted.

Here, since the front cover 13c has elasticity, even if a load in a direction intersecting the plugging direction of the electrical wiring plug 10 is applied to the housing 13, a portion of the front cover 13c corresponding to the recess 14 into which the electrical wiring connector 10 is plugged is not damaged. Further, since the case 13a and the rear cover 13d are formed of the urea resin having the leakage resistance, the case 13 can be prevented from being damaged by leakage and a fire can be prevented from occurring.

Four insertion holes into which four screws 59 for fixing the front cover 13c and the rear cover 13d are inserted are formed in the housing 13a, and a connection through hole 57b for communicating with the insertion hole 57a is formed in a portion of the rear cover 13d corresponding to the insertion hole 57a of the housing 13 a. On the other hand, an insertion hole insertion press 57c is provided through the front cover 13c so as to communicate with the insertion holes 57a, 57b of the case 13a and the rear cover 13d on the side of the recess 14, respectively, and a locking piece 58a is provided on the rear surface of the front cover 13c so as to protrude downward vertically from a hole edge locking piece 58 of the insertion hole 57c and outward from an end of the locking piece 58. When the housing 13 is assembled, the male tab 15 is attached to the housing 13a, the locking piece 58 of the front cover 13c is inserted into the insertion hole 57a of the corresponding housing 13a, the locking claw 58a of the locking piece 58 is locked to the end face of the countersink communicating with the insertion hole 57a, and the nut 60 is press-fitted into the countersink to fix the front cover 13c to the housing 13 a. Further, a spot facing is also formed in the other insertion hole 57a of the housing 13a, and the nut 60 is also press-fitted into the spot facing. Then, the rear cover 13d is attached to the upper surface of the housing 13a, the 4 screws 59 are inserted into the insertion holes 57 of the rear cover 13d, and the front cover 13c and the rear cover 13d are fixed to the housing 13a by screwing the nuts 60.

As described above, the rear cover 13d is detachably mounted to the housing 13a with the front cover 13c locked to the housing 13a interposed between the housings 13 a. Therefore, when the rear cover 13d is removed, the front cover 13c is attached to the housing 13a, and the periphery of the male tab 15 can be protected.

In the present embodiment, the case 13a and the rear cover 13d are formed of urea resin, but the material for forming the case and the rear cover is not limited to urea resin, and may be formed of synthetic resin having electrical leakage resistance. The front cover 13a is formed of nylon, but the material for forming the front cover 13a is not limited to nylon, and may be formed of a synthetic resin having elasticity.

As described above, according to the present invention, since the display unit for displaying the information necessary for the electric wiring is provided on the surface of the housing, the information necessary for the electric wiring, such as the electric characteristics and the usage of the electric wiring plug, can be read from the display unit, the time required for knowing the electric characteristics and the usage of the electric wiring plug from the wiring pattern and the like can be saved, and the workability during wiring and maintenance can be improved.

In the present invention, the purpose and name of the electrical wiring joint can be easily determined from the name indicating section, and the wiring operation can be easily performed.

In addition, the temporary fixing of the insert piece in the present invention can stabilize the mounting state, and the assembling work of the housing and the housing cover can be easily performed.

In addition, the invention forms a certain protruding state in the concave part of the locking claw, the locking claw of the locking body is clamped between the front surface of the plug part and the inner surface of the concave part of the plug part in the plugging direction, the electric wiring plug is connected to the electric wiring connector in a certain state, the connection is well performed, and the locking sheet is elastically locked on the opening edge of the opening formed by the shell, therefore, the locking sheet is tightly contacted with the edge of the opening, and the locking claw is locked in the locking groove of the plug part in a certain state, thereby having the effect of reliably preventing falling off.

In the present invention, the locking body is temporarily fixed to the housing by the temporary fixing portion, so that the assembly work of the housing and the cover can be easily performed, and the locking body is fixed when the housing and the cover are assembled, thereby having an effect of easily fixing the locking body.

In the present invention, even if the electric wiring plug receives an external force in the vertical direction or the horizontal direction in a state where the electric wiring connector is inserted, the front cover has elasticity, so that the front cover can be prevented from being damaged. Further, since the case and the rear cover are made of electrically leakage-resistant synthetic resin, it is possible to prevent the case from being damaged by electric leakage and to prevent a fire from occurring.

In addition, when the wiring operation and maintenance of the invention are carried out, the front cover is also installed on the shell under the state that the rear cover is taken down, and the effect of protecting the periphery of the inserting sheet is achieved.

In another aspect of the present invention, since the operation portion for operating the release button is exposed on the surface of the housing, when the length of the lead wire is not suitable and needs to be replaced, the lead wire can be easily removed by operating the operation portion of the release button, and only the replaced lead wire core wire is inserted from the lead wire insertion opening, and the core wire is elastically sandwiched between the lock spring and the contact piece, whereby the lead wire can be connected, and the re-connection operation can be easily performed.

In the above-described another aspect of the present invention, the operation portion can be manually operated without using any special tool, and the lead can be easily removed.

In the above-described another aspect of the present invention, the electrical wiring connector of a different nominal value and use can be prevented from being connected.

In the above-described another invention, the temporarily fixing tabs can be stably attached, and the assembling work of the housing and the cover can be easily performed.

In the above-mentioned another invention, the locking claw of the locking body is held between the front surface of the receptacle and the inner surface of the recess in the insertion direction of the receptacle in a state in which the projection state into the recess of the locking claw is constant, and the electric wiring plug can be connected to the electric wiring connector, and good connection can be performed.

In the above-described another aspect of the present invention, since the lock body is temporarily fixed to the housing by the temporary fixing portion, the operation of assembling the housing and the case can be easily performed, and the lock body is fixed when the housing and the case cover are assembled, which has an effect that the lock body can be easily fixed.

In the above-described another aspect of the present invention, even when the electrical wiring connector is inserted into the electrical wiring plug and external force is applied to the electrical wiring plug in the vertical direction or the horizontal direction, the front cover has elasticity, so that the front cover is prevented from being damaged, and the housing and the rear cover are made of a synthetic resin having leakage resistance. Therefore, the case is prevented from being damaged by the leakage of electricity and a fire is prevented from occurring.

Finally, in the above another aspect of the present invention, the front cover is attached to the housing even when the rear cover is removed during the wiring work and maintenance, and the periphery of the insert piece can be protected.

Claims (16)

1. An electric wiring plug, wherein a recess for fitting an electric wiring connector constituting a receiving side is formed in the front face of a housing, the front end portions of a plurality of blades are inserted into the recess, the rear end portions of the plurality of blades are connected to core wires of a plurality of lead wires, respectively, and a display portion for displaying information necessary for electric wiring is provided on the surface of the housing.

2. The electrical wiring plug as set forth in claim 1, wherein said indication portion is constituted by a name indication portion indicating a purpose and a name.

3. The electrical wiring plug as set forth in claim 1, wherein a miswire preventing portion for preventing reverse insertion into the recess or connection of electrical wiring connectors different in nominal value and use is provided.

4. The electrical wiring plug as set forth in claim 1, wherein the housing is composed of a housing and a housing cover, a plurality of fixing grooves for fixing the center portions of the blades are formed in the inner walls of the housing and the housing cover facing the fitting direction of the electrical wiring connector to the recess, a housing chamber for housing the root portions of the blades is formed in the housing, and blade fixing portions for temporarily fixing the blades are provided on the bottom surface of the housing chamber and the blades.

5. The electrical wiring plug as set forth in claim 4, wherein said blade fixing portion is a temporary fixing structure in which the blade is temporarily fixed by being fitted in a concavo-convex manner.

6. The electrical wiring plug as claimed in claim 1, wherein a locking body made of a flexible material for preventing falling off when the electrical wiring connector is connected is provided on the housing, and a locking claw is formed at a front end of the locking body, the locking claw being a locking claw which is locked by an opening formed in the housing protruding in the recess in a locking groove formed outside the electrical wiring connector insertion portion, and a locking piece which is elastically locked by an edge of the opening and is held in a protruding state in the recess of the locking claw is provided at an edge of the opening.

7. The electrical wiring plug as set forth in claim 6, wherein a temporarily fixing portion for temporarily fixing the locking body is formed by elastically fitting a fixing portion formed by the locking body to either one of a housing and a housing cover constituting said housing, and a holding portion for holding the temporarily fixing portion of the locking body is formed between the housing and the housing cover when the housing cover and the housing are combined.

8. The electrical wiring plug as in claim 1, wherein the rear cover sandwiches an end portion of the front cover locked to the housing between the housing and the rear cover, and is detachably mounted to the housing.

9. An electrical wiring plug comprising a housing, a recess formed in a front surface of the housing and fitted with a connector for receiving electrical wiring on a receiving side, a plurality of blades extending into the recess, core wires connected to rear ends of the blades, wire insertion holes formed in a rear end of the housing and into which the core wires are inserted, contact pieces formed in root portions of the blades and contacting the core wires inserted from the wire insertion holes, a plurality of locking springs for elastically clamping the core wires between the contact pieces, and a release button for releasing the state of elastically clamping the core wires by pressing the locking springs away from the contact pieces, wherein the housing is formed of a case and a cover, the cover is formed of a front cover for covering the periphery of the blades and a rear cover for covering the portion of the housing, and the case and the rear cover are formed of an electric leakage resistant synthetic resin, meanwhile, the front cover is formed of synthetic resin having elasticity.

10. The electrical wiring plug of claim 9, wherein said operating portion is sized to be operable by hand.

11. The electrical wiring plug as claimed in claim 9, wherein a miswire prevention portion is provided for preventing reverse insertion into an inner surface of the recess portion or connection of electrical wiring connectors different in nominal value and use.

12. The electrical wiring plug as claimed in claim 9, wherein the housing is composed of a housing and a housing cover, a plurality of fixing grooves for fixing the center portions of the blades are formed in the inner walls of the housing and the housing cover facing the terminal fitting direction of the recess, a housing chamber for housing the rear end portions of the blades is formed in the housing, and blade fixing portions for temporarily fixing the blades are provided on the bottom surface of the housing chamber and the blades.

13. The electrical wiring plug as set forth in claim 12, wherein said blade fixing portion is a temporary fixing structure in which the blade is temporarily fixed by being fitted in a concavo-convex manner.

14. The electrical wiring plug as claimed in claim 9, wherein a locking body made of a flexible material for preventing falling off when the electrical wiring connector is connected is provided on the housing, a locking claw is formed at a front end of the locking body, the locking claw is a locking claw which is locked by an opening formed in the housing protruding in a locking groove formed in the recess outside the electrical wiring connector insertion portion, and a locking piece which is elastically locked at an opening edge of the opening and maintains a certain protruding state in the locking claw recess.

15. The electrical wiring plug as set forth in claim 14, wherein either one of the housing and the cover constituting the housing is elastically fitted to a fixing portion formed on the locking body in a concavo-convex manner to form a temporary fixing portion for temporarily fixing the locking body, and wherein a holding portion for holding the temporary fixing portion of the locking body is formed on the housing and the cover when the cover and the housing are combined.

16. The electrical distribution plug defined in claim 9 wherein the rear cover sandwiches the end of the front cover locked to the housing between the rear cover and the housing, and is removably and freely mounted to the housing.