JP3076413B2 - 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 into which a harness connector on the receiving side is fitted is formed in the 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, such a conventional harness plug has a housing made of a hard material such as a thermosetting resin, so that it is weak against an impact or the like.
There is a problem that the housing is relatively easily broken. Therefore, as a method of improving this point, it is conceivable to form the housing with a soft thermoplastic resin or the like to make the housing resistant to impact or the like. However, thermoplastic resins and the like have a problem that they lack heat resistance and insulation properties.

[0004] 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 which is excellent in heat resistance, insulation, and impact resistance.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a body having an open front surface is provided.
Housing with a cover that opens to the front and adheres to the body
Formed at the front opening of the body and the cover, respectively.
The insertion part of the harness connector with the recess
A recess is provided, and the interior is separated from the recess by the inner wall of the recess.
A space is provided at the rear of the housing and faces the internal space.
Plural blades are separated in parallel on the inner bottom surface of the housing.
A partition is formed, and the inner bottom surface of the recess of the cover has an upper surface.
Note that the harness connector
Form a ridge in which the reverse insertion prevention groove of the connector is fitted.
The blade stores the rear part between the partition walls, and
It is arranged in parallel with the fixed part provided on the back wall.
The intermediate part is fixed and the front part is inserted into the recess through the back wall.
Located at the rear end of the housing at the base end of each blade
Into the above internal space from the cord outlet
A fixing part is provided to caulk and fix the core wire of the cord.
Each of the above that faces the inner bottom surface of the body located in the internal space
Positioning fixed to the body on the blade surface
Means is provided.

[0006]

The present invention has the above-described structure,
Harness plug that ensures heat resistance and insulation with thermosetting resin and impact resistance with thermoplastic resin, and satisfies all of heat resistance, insulation, and impact resistance Is provided.

[0007]

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.

The zonal pull box 1 is formed by blocking various objects and connecting the blocks to form an integrated unit. 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. 5, an outlet as a wiring device 5 is connected to each branch end. 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, a block 1c connects the load connecting wiring device 5 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 faces 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. 1, the harness plug 11 is provided with a concave portion 1 into which a harness connector 10 (or a 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
The first housing 13 has a double structure in which the outside of the thermosetting resin is covered with a thermoplastic resin (indicated by a broken line in the figure). In the following description, a portion made of a thermosetting resin will be called a housing 13 and a portion made of a thermoplastic resin will be called an outer skin 13 '. The housing 13 formed of the thermosetting resin includes a body 13a and a cover 13b as shown in FIG.

The body 13a has a box shape with an open top and front, and the interior is separated into front and rear spaces by a partition wall 16,
The concave portion 14a formed at the front defines a concave portion 14 into which the insertion portion 30 (see FIG. 3) 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.

[0015] blade 15 is formed in a plate shape with a conductive material, is formed a caulking portion 15 a that connects the core of the extension cord 4 and the instrument cord 6 is crimped to the proximal end. Here, the cords 4 and 6 obtained by caulking the core wire on the blade 15 are covered with the cover 13b.
Is pulled out through the concave portion 19 of the body 13a serving as a cord outlet formed at the rear end of the housing 13 when the cover 13 is attached. A positioning piece 1 for positioning and fixing to the body 13a from the lower surface of the base end of the plug blade 15
5b is protruded. Although a positioning rib for fitting the positioning piece 15b is formed on the bottom surface of the body 13a, it is not shown in FIG.

The blades (indicated by 15 'in FIG. 2) of the blades 15 to which the grounding poles of the cords 4 and 6 are connected 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.

The cover 13b has the same internal structure as the body 13a and has a box-like shape with the lower surface and the front surface open, and the locking claw pieces 20 are suspended from the lower surfaces on both sides. The locking claw 20 fits into a concave portion 21 formed on both sides of the body 13a, and a claw portion 20a formed at the tip thereof.
Are elastically locked to the lower surface of the body 13a to attach the cover 13b to the body 13a.

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 that runs in the direction of insertion of the harness connector 10 that fits into the harness connector 10 (see FIG. 3) is formed to prevent reverse connection or connection of the harness connector 10 having a different rating or use.

Here, in order to prevent the harness plug 11 of this kind from coming off from the harness connector 10, a lock piece 23 which is detachably engaged with a locking groove 35 formed in the harness connector 10 is provided. 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 piece 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 fixed portion 23b is formed 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 so that the harness plug 11 can be removed from the harness connector 10.

Although the above-described configuration is a description of a portion similar in configuration to the case of the conventional harness plug 11, in the case of the present embodiment, the thermosetting resin The exterior of the housing 13 is molded with a thermoplastic resin such as vinyl chloride as shown in FIG. At this time, the lead portions of the cords 4 and 6 are molded with a thermoplastic resin and covered with an outer cover 13 '.

In this way, impact resistance can be ensured by the function of the outer cover 13 '. In addition, since the heat resistance and insulation properties are secured by the thermosetting resin housing 13, the harness plug 11 having excellent heat resistance, insulation properties and impact resistance can be obtained. Next, the harness connector 10 will be described. As shown in FIG. 3, 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, and a plug formed on the front surface of the insertion portion 30. Plug blade 1 of harness plug 11 inserted from blade insertion port 31
5 is provided with a plurality of blade receiving springs 32 for receiving the respective 5. 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 also has a double structure in which the outside of the thermosetting resin is covered with a thermoplastic resin (indicated by a broken line in the figure), like the harness plug 11. Also in this harness connector 10, a portion made of a thermosetting resin is called a housing 33, and a portion made of a thermoplastic resin is called an outer cover 33 '.

As shown in FIG. 4, a housing 33 made of the above-mentioned thermosetting resin is provided with a body 33a and a cover 3.
3b, and the locking claw pieces 40, which are vertically provided from the lower surfaces of both sides of the cover 33b, are elastically locked in recesses 41 formed on both sides of the body 33a, and the cover 33b is attached to the body 33a. As a structure to be adhered to. However, in the case of the harness connector 10, the locking claw pieces 40 are formed elastically in the upper step of the recess 41.

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 opposed to 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. A caulking portion 32b for caulking the core wire of the cord 4 is formed at the tip of the extension piece extending rearward. 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. Further, in the case of this harness connector 10, the cord 4 is individually provided for each pole in the concave portion 39 forming the wire outlet of the body 33a.
It is drawn from. However, harness plug 1
The drawer structure of the cord 4 may be the same as in the case of 1.

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. Further, a circular grip portion 37 is formed on the upper surface behind the front storage portion 30b so as to easily hold the harness connector 10 when the harness plug 11 is inserted into the harness connector 10.

Although the above-described configuration has been described in connection with the configuration similar to that of the conventional harness connector 10, in the case of the present embodiment, the thermosetting resin Is molded with a thermoplastic resin such as vinyl chloride as shown in FIG. At this time, the portion of the cord 4 to which the cord 4 is drawn out is molded with a thermoplastic resin and covered with an outer cover 33 '.

In this way, as in the case of the harness plug 11, the impact resistance can be ensured by the function of the outer cover 33 '. In addition, since the heat resistance and insulation properties are secured by the thermosetting resin housing 13, the harness plug 11 having excellent heat resistance, insulation properties and impact resistance can be obtained. In the case of the harness connector 10, the insertion portion 30 is not covered with the outer cover 33 ′ because of the fitting of the harness plug 11 to the concave portion 14,
Also, in order to make it easier to fix the harness connector 10 when connecting, the grip portion 37 is not covered with the outer cover 33 '.

When connecting the harness plug 11 to the harness connector 10, the recess 14 of the harness plug 11 and the insertion portion 30 of the harness connector 10 are oriented so that the ridge 22 fits 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 locking state of the locking claw 23a of the lock piece 23, and the harness plug 11 is moved backward. Just pull it out.

[0032]

According to the first aspect of the present invention, the inner bottom of the recess of the cover is provided.
On the surface, corresponding to the insertion direction of the harness connector,
Form a ridge into which the reverse insertion prevention groove of the harness connector fits.
Of the wrong connection other than the corresponding harness connector
Position each blade in the internal space at the rear of the housing.
The rear part is stored between the partitions provided on the inner bottom of the body
When placed in parallel in the internal space provided at the rear of the housing
Both are located on the back wall of the recess provided on the front opening side of the housing.
The intermediate part is fixed to the fixing part provided and the front part is
To the inside of the recess, and the inside of the body located in the internal space
The face of each of the blades facing the bottom is positioned with respect to the body
Since the positioning means is fixed and fixed,
It can be securely fixed in place, improving assembly
In addition, it is provided at the rear end of the housing at the base end of the blade.
Introduced into the above internal space from the cord outlet
There is a fixing part that caulks and fixes the core wire of the cord
Thus, the cord can be reliably fixedly connected to the blade.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view showing a configuration excluding an outer skin of the harness plug according to the first embodiment.

FIG. 3 is a perspective view showing an appearance of a corresponding harness connector.

FIG. 4 is an exploded perspective view showing a configuration of the same harness connector except for an outer skin.

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

[Explanation of symbols]

 Reference Signs List 4 extension cord 6 instrument cord 10 harness connector 11 harness plug 13 housing 13 'outer cover 14 recess 15 plug blade

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/502

Claims (1)

(57) [Claims] A body having an open front surface and a body having an open front surface.
A housing is formed by a cover attached to the
Recesses formed in the front opening of the
A recess for inserting the insertion portion of the harness connector.
The inner space separated from the recess by the inner wall of the recess
The housing provided at the rear of the jing and facing the internal space
A partition for separating a plurality of blades in parallel is formed on the inner bottom surface of the harness connector, and the harness connector is formed on the inner bottom surface of the recess of the cover.
The harness connector according to the insertion direction of the connector.
Forming a ridge in which the prevention groove fits, and each of the above-mentioned blades accommodates a rear portion between the partition walls to form the inner portion.
It is arranged in parallel with the space, and the fixed
The intermediate part is fixed to the fixed part and the front part is
Located in the recess, the base end of each plug blade has a cord
Of the code introduced into the above internal space from the outlet
A fixing portion for caulking and fixing the core wire is provided, and the fixing portion is opposed to the inner bottom surface of the body located in the internal space.
Position that is positioned and fixed to the body on the surface of each blade
A harness plug characterized by having a determining means .