JP3314956B2 - Harness plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harness plug which is attached to the end of a power supply line for connecting a power supply line by a connector system and which is generally used together with a harness connector on the receiving side.

[0002]

2. Description of the Related Art In a harness plug, a recess in which a harness connector on the receiving side is fitted is formed in a front surface of a housing, and a plurality of blades each having a plurality of core wires of an electric wire connected in the recess. And the plug blades are inserted and fitted into blade receiving springs provided inside the harness connector, respectively, to perform electrical connection.

[0003]

However, in a conventional harness plug of this type, various types having different ratings and applications are formed in almost the same shape, which causes erroneous connection such as reverse insertion. There was a problem. The present invention has been made in view of the above points, and an object of the present invention is to provide a harness plug that does not cause incorrect connection.

[0004]

According to the present invention, in order to achieve the above object, a harness connector as a receiving side is inserted and connected.
The recess part is fitted is formed on the front surface of the housing, insertion
Insert multiple blades into the blade insertion slot
It is formed so as to face the inside of the recess, and multiple blades
And the outer surface of the harness connector insertion part
Two reverses formed between adjacent blade insertion ports at
Insert the two ridges that fit into the insertion prevention grooves
Formed on the inner surface of the recess so as to run in the insertion direction of the
It is characterized in that an erroneous connection preventing portion is configured to prevent reverse connection or connection of harness connectors having different ratings and applications by the two ridges .

[0005]

According to the present invention, the harness connector and the harness plug of different types are not connected to each other by the erroneous connection preventing portion, thereby preventing the erroneous connection.

[0006]

1 to 5 show an embodiment of the present invention. First, an indoor wiring system as an example to which the harness plug of the present embodiment is applied will be described. In this indoor wiring system, as shown in FIG. 5, a zone pull box 1 to which a power supply cable 3 from a distribution board and a plurality of extension cables 4 are connected is installed in various places in an indoor space (for example, in each indoor zone). Provide. The zonal pull box 1 is installed, for example, behind the ceiling so as to be inconspicuous. The extension cable 4 has a harness connector 10 and a harness plug 1 at both ends.
1 is attached. In the present embodiment, the wiring device 5
A harness plug 11 is attached to the end of the instrument cable 6.

[0007] The zonal pull box 1 is formed by blocking various things and connecting these blocks to be integrated. Here, an example will be described. For example, the block 1a in FIG. 5 is a circuit in which a power supply line is branched into three and sent and wired. In the case of FIG. Have been. Block 1
b connects the feed wiring, the wiring device 5 for load connection, and the switch 9 for controlling the load 7, respectively. In the case of FIG. 5, the lighting device has the load 7 provided on the ceiling. A hooking ceiling is used as the wiring device 5 for connecting the load, and is used when the lighting device is turned on and off by a switch 9 provided near the door 30 at the entrance of the room.

Further, the block 1c connects the wiring device 5 for load connection and a plurality of switches 9 for controlling the load 7, respectively. In the case of FIG. 5, the bed 7 has the load 7 provided on a wall. The lighting device is used as lighting, and an outlet for connecting the lighting device is used as the wiring device 5 for connecting the load. The switch 9 is a door 30 at the entrance of the room.
And a switch provided on the wall near the bed 31 and a so-called three-way circuit. This configuration is used when the bed lighting can be turned on and off by any of the switches 9.

Each block 1 of the zone pull box 1
Each of a to 1c has one connecting portion 8a having the same structure as a harness plug 11 described later on one end surface, and has one connecting portion 8b having the same structure as a harness connector 10 described later on the other end surface. . The connection portions 8a and 8b are directly connected. That is, the pair of power supply lines and the ground line of the power supply cable 3 are connected to the three-pole terminals of the connection portion 8b. Furthermore, each block 1
Each of the blocks 1a to 1c includes two connection portions 8b having the same structure as the harness connector 10 on both end surfaces of the blocks 1a to 1c.
Inside, the power supplied from the power cable 3 is branched and supplied to the terminals of these connection portions 8b in accordance with the above-mentioned applications. In addition, the connection part 8a of the zonal pull box 1
Since the structure of 8b is easily understood from the structure of the harness connector 10 and the harness plug 11 described later, detailed description is omitted.

Here, a harness connector 10 attached to the end of the power cable 3 is detachably connected to the connection portion 8a of one block (the block 1a in this embodiment), and is connected to the connection portion 8a. The harness connector 10 is prevented from coming off by a lock body 80 provided on the corresponding upper surface, and the harness connector 10 can be detached by operating the lock body 80.

The connecting portions 8a on the other end surfaces of the blocks 1a and 1b are connected to the connecting portions 8a of the other blocks 1b and 1c, respectively, whereby the blocks 1a to 1c are integrally connected. Power of block 1
b, 1c. Next, the harness connector 10 and the harness plug 11 attached to the distal end of the extension cable 4 and the device cable 6 of the wiring device 5 will be described. In the case of FIG. 5, a harness connector 10 is attached to a side of the extension cable 4 to be connected to the instrument cable 6, a harness plug 11 is attached to the other end, and an instrument cable of the wiring instrument 5 such as an outlet or a hooking ceiling. 6, a harness plug 11 is attached.

First, as shown in FIG. 2, the harness plug 11 has a recess 1 into which the harness connector 10 (or the connection portion 8b of the blocks 1a to 1c) on the receiving side is fitted.
4 are formed on the front surface of the housing 13, and a plurality of blades 15, each of which has a plurality of core wires connected thereto, in the recess 14.
Has a structure facing the front end. This harness plug 1
As shown in FIG.
a and the cover 13b.

The body 13a has a box shape having an upper surface and a front surface that are open.
The recess 14a formed in the front defines a recess 14 into which the insertion portion 30 (see FIG. 4) of the harness connector 10 is inserted. The partition 16 is provided with a fixing portion 17 for press-fitting and fixing the three blades 15.
Is attached to the fixing portion 17, the blade 15 is inserted into the recess 14a.
Are arranged in a row. And the body 13a
The interior space behind is divided into three sections by two partitions 18 and the blade 15 is housed in each section. This body 1
At the rear end of 3a, three concave portions 19 serving as an electric wire insertion port are formed in combination with the cover 13b. In addition,
These recesses 19 are formed in such a shape that the inside of the wire insertion opening has a small diameter and the positioning of the core wire can be reliably performed.

The blade 15 is formed of a conductive material in the shape of a plate, and its base is bent so as to abut one inner surface of each section, and a contact piece 15a whose core wire contacts the lower surface laterally from at least the upper part of the base. Is formed. A positioning piece 15b for positioning and fixing to the body 13a protrudes from the lower surface of the central portion of the plug blade 15. The body 13
A positioning rib for fitting the positioning piece 15b is formed on the bottom surface of a, but is not shown in FIG.

The blades (shown by 15 'in FIG. 1) to which the grounding poles of the cords 4 and 6 are connected among the blades 15 so as to project slightly forward from the other blades 15. It is long or can be attached to the other side. This is because the ground electrode is first connected when the other blade 15 is connected to the blade receiving spring of the harness connector 10, and the ground electrode is finally released when the other blade 15 is removed, so that the safety is improved. This is to ensure the nature.

A lock for elastically pressing the core of an electric wire against the contact piece 15a is provided between the contact piece 15a of each of the blades 15 and the rear end of each of the three sections of the body 13a. The spring 20 is arranged. The cover 13b has a box-like shape whose inner structure is substantially the same as that of the body 13a and has a lower surface and a front surface that are open, and an insertion hole 27 through which a stopper 26 is formed at four locations on the upper surface. The distal end is swaged through a fitting 26 through an insertion hole 28 formed in the body 13a corresponding to the insertion hole 27, and the cover 1 is attached to the body 13a.
3b.

The recess 1 of the body 13a of the cover 13b
On the inner bottom surface of the recess 14b forming the recess 14 together with the recess 4a, a reverse insertion preventing groove 34 of the harness connector 10 described later is provided.
A ridge 22 is formed as an erroneous connection preventing portion 100 that runs in the insertion direction of the harness connector 10 that fits into the harness connector 10 (see FIG. 4).
This prevents reverse connection or connection of a harness connector 10 having a different rating or application.

Here, in order to prevent the harness connector 10 from slipping off from the harness connector 10, a lock piece 23 is detachably engaged with a locking groove 35 formed in the harness connector 10. Equipped with this lock piece 2
3 is provided on the cover 13b side. In the case of this type of conventional harness connector or harness plug, the same thing as the above-mentioned lock piece 23 was provided on the body side. However, since the shape of the harness plug becomes large in this case, in the case of this embodiment, The lock piece 23 is provided only on the cover 13b side to reduce the size of the harness plug 10.

In order to attach the lock piece 23 to the cover 13b, the center of the upper surface of the cover 13b is recessed,
An attachment portion 24 for the lock piece 23 is formed. An opening 25 is formed in a portion corresponding to the recess 14b of the mounting portion 24,
From this opening 25, the locking claw 23a of the lock piece 23 is
4 as a structure projecting. And this opening 25
A fixing portion 24a for fixing the lock piece 23 is formed at the rear portion. Here, an L-shaped fixing piece 23b is suspended from the central lower surface of the lock piece 23 to form a fixing claw 23c protruding from the lower surface of the fixing piece 23b. A fixing hole 24b formed in the fixing portion 24a
And the lock piece 23 is attached to the attachment portion 24. The rear portion of the fixing portion 23b is formed to be larger than the pressing operation portion 23d of the lock piece 23.
d can be pressed with a finger. That is, when the pressing operation portion 23d of the lock piece 23 is pressed down, the locking claw 23a side is rotated upward with the fixing piece 23b as a fulcrum,
The locking claw 23a is detached from the locking groove 35 of the harness connector 10, and the harness plug 11 can be removed from the harness connector 10.

The cover 13b is attached to the body 13
When it is attached to a, the release button 21 is placed in a position corresponding to the quick connection portion of the electric wire composed of the lock spring 20 and the contact piece 15a.
The release button 21 pushes the lock spring 20 away from the contact piece 15a to release the elastic pinching state of the core wire. In order to operate the release button 21, a release window 29 is formed on the upper surface of the cover 13b. It is. The release button 21 is operated by inserting the tip of a tool such as a flathead screwdriver into the release window 29.

Next, the harness connector 10 will be described. As shown in FIG. 4, the harness connector 10 has an insertion portion 30 that is inserted into the recess 14 of the harness plug 11 on the insertion side formed on the front surface.
A plurality of blade receiving springs 32 respectively receiving the blades 15 of the harness plug 11 inserted from the blade insertion port 31 formed on the front surface of the harness plug 11 are provided inside. In this embodiment, such a structure is not used, but a connection to a zonal pull box or the like may be made.

The housing 3 of the harness connector 10
3, a body 33a and a cover 33, as shown in FIG.
b are formed at four places on the upper surface of the cover 33b.
In response to the above, the distal end is swaged through a fitting 40 through an insertion hole 42 formed in the body 33a, and a cover 33b is attached to the body 33a.

The body 33a has a box shape with an open top.
The front storage portion 30a, which becomes the insertion portion 30 when attached to the cover 33b, is divided into three sections by two partition walls 36, and the blade receiving spring 32 is housed in each section. In addition,
The partition 36 is formed over the entire length of the substantially blade receiving spring 32 from the front storage portion 30a to the rear. A concave portion 31 serving as a blade insertion port 31 is provided on a front portion corresponding to each section.
a is formed.

The blade receiving spring 32 is formed of a conductive material and includes a pair of holding pieces 32a facing each other so as to hold the blade 15 from both sides. The holding pieces 32a are connected at a center portion, and further from the center portion. The distal end portion of the extending piece extending rearward is bent so as to abut on one inner surface of each section, and further, a contact piece 32b is formed in which a core wire contacts a lower surface sideways from at least an upper portion of the tip portion, and these contact pieces 32b And the lock springs 43 are arranged under each of them. In addition, the central part of the holding piece 32a is structured to be bent in a U-shape to increase the holding force of the blade 15. Also, in the case of the harness connector 10, a concave portion 45 serving as a wire insertion port for inserting a core wire between the lock spring 43 and the contact piece 32b is formed at the rear end of the body 33a.

The cover 33b has an internal structure of a body 33a.
In this cover 33b, the reverse insertion preventing groove 34 in which the ridge 22 of the harness plug 11 fits, and the locking of the lock piece 23 are formed on the upper surface of the front storage portion 30b constituting the insertion portion 33. A locking groove 35 for locking the claw 23a is formed. When the cover 33b is attached to the body 33a, the release button 44 is housed in a position corresponding to the quick connection portion of the electric wire composed of the lock spring 20 and the contact piece 15a. In order to operate the release button 44, a release window 46 is formed on the upper surface of the cover 33b.

With the quick-connecting structure having the function of releasing the electric wires connected to the harness connector 10 and the harness plug 11 as described above, if the wires need to be replaced because their lengths do not match, the release buttons 21 and 44 can be used. , The wire can be easily removed, and the core wire is elastically clamped between the lock springs 20, 43 and the contact pieces 15a, 32b simply by inserting the core wire of the replaced wire from the wire insertion opening. Thus, the connection of the electric wires can be performed, the reconnection operation can be easily performed, and the replacement operation of the electric wires can be performed extremely easily.

When connecting the harness plug 11 to the harness connector 10, the direction of the recess 14 of the harness plug 11 and the insertion portion 30 of the harness connector 10 are aligned so that the ridge 22 is fitted into the reverse insertion preventing groove 34. Harness plug 1
When the blade 1 is pushed into the harness connector 10, the blade 15 is inserted into the blade insertion slot 31, and each blade 15 is connected to the blade receiving spring 32. At this time, the locking claw 2 of the lock piece 23
3a is locked in the locking groove 35 to prevent it from falling off.

When removing the harness plug 11 from the harness connector 10, the pressing operation portion 23d of the lock piece 23 is pushed in to release the locked state of the locking claw 23a of the lock piece 23, and the harness plug 11 is moved backward. Just pull it out .

[0029]

As described above, according to the present invention, a plurality of recesses are formed in the front surface of the housing in which the receiving portion of the harness connector on the receiving side is fitted. A plurality of blades are formed so that the tips face the recesses, a plurality of core wires of an electric wire are respectively connected to the plurality of blades, and a plurality of blades are connected between adjacent blade insertion holes on the outer surface of the insertion portion of the harness connector. The two ridges that fit into the two reverse insertion prevention grooves formed on the inner surface of the recessed portion run in the direction of insertion of the harness connector, and the two ridges reversely insert or have different ratings and uses. The harness connector is configured so as to prevent the connection of the harness connector, so that the harness connector and the harness plug of different types are not connected by the misconnection prevention portion, thereby preventing the misconnection. Is the thing In addition, since the two ridges forming the misconnection prevention part are formed so as to run in the insertion direction of the harness connector, the insertion direction of the harness connector is guided by the ridge, and the harness connector is inclined. It is possible to prevent erroneous insertion such as being inserted in an inclined state. Further, the two collision condition from that fit respectively to the two reverse insertion preventing groove formed between the blade insertion slots adjacent the outer surface of the insertion portion of the harness connector, the reverse insertion preventing groove of the harness connector, interpolation It can be formed between adjacent blade insertion ports which are thick portions of the attachment portion, and there is no need to form the attachment portion thicker by the reverse insertion prevention groove,
The insertion portion can be downsized, and accordingly, the harness connector into which the insertion portion is inserted can be downsized. Furthermore, since the tip of the blade is formed so that the tip faces the inside of the recess, and the protrusion is formed so that one end faces the opening of the recess, the tip of the blade is more recessed than one end of the protrusion. When inserting the insertion part of the harness connector into the recess of the harness plug, first check that the ridge fits in the reverse insertion prevention groove and that there is no reverse insertion or incorrect connection Only when the blade is inserted into the blade insertion slot, the blade is inserted into the blade insertion hole, and the harness plug and the harness connector are electrically connected. It is possible to reliably prevent a situation in which the harness plug and the harness connector are electrically connected in the state of reverse insertion or incorrect insertion without confirming reverse insertion or incorrect insertion. You can do it.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a harness plug according to one embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of the harness plug according to the first embodiment.

FIG. 3 is an exploded perspective view of the corresponding harness connector.

FIG. 4 is a perspective view illustrating an appearance of the harness connector according to the first embodiment.

FIG. 5 is an explanatory diagram showing an indoor wiring system using the above harness plug and harness connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Harness connector 11 Harness plug 13 Housing 14 Depression 15 Plug blade 100 Misconnection prevention part

Claims (1)

(57) [Claims] 1. A received a recess insertion portion of the harness connector <br/> is fitted to the side is formed on the front surface of the housing, insertion portion
Insert multiple blades into the blade insertion slot
Formed in such a way that it faces the inside of the
Connect the core wires to the outer surface of the harness connector
Two inverted differences formed between adjacent blade inserts
Two ridges that fit into the locking grooves, respectively,
Run in the insertion direction and one end faces the opening of the recess
The harness plug is formed on the inner surface of the recess as described above, and constitutes an erroneous connection preventing portion configured to prevent reverse connection or connection of a harness connector having a different rating or use by two protrusions .