JP3249542B2 - Harness plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used with a harness connector to connect a power supply line, and is used for a harness plug with a plurality of blades sandwiched between a body and a cover constituting a housing. It relates to an insulating structure.

[0002]

2. Description of the Related Art A harness plug is attached, for example, to the tip of a power cord of a wiring device, and is connected to a harness connector on the receiving side of the harness plug attached to a power supply line for supplying power to the wiring device. This type of harness plug A will be described with reference to FIGS. 2 and 4. As shown in FIG. 2, a recess 13 is formed in the front surface of the housing 1, and a harness partially shown in FIG. When the connection portion 40 of the connector B is fitted, the plurality of blades 15 protruding into the recess 13 are connected to a blade receiving spring (not shown) of the harness connector B.

[0003] In this type of conventional harness plug A, as shown in FIG. 6, divided in a manner to divide the recess 13
Form a ball Di 11 and the cover 12 (recess 13 which is to 2 minutes
The housing 1 is constituted by half of the body 11 (see FIG. 3).
2 is a box shape with either the front surface or the upper and lower surfaces opened,
Partition walls 20 and 43 running in a direction orthogonal to the fitting direction of the harness connector B are formed, and the recess 1 is formed at the fitting side portion of the harness connector B separated by the partition walls 20 and 43.
3 and, on the other hand, a storage chamber for the blade 15. A fixing groove 16 for fixing the plug blade 15 is formed in each of the partition walls 20 and 43, and the cover 1 is
When the cover 2 is attached, the blade 15 is fixed. The storage chamber for storing the blade 15 has a structure in which a partition (18 in FIG. 3 in the case of a body) for separating the blades 15 is formed in the storage chamber, and the insulation of the blade 15 is improved. is there.

[0004]

However, in the case of the harness plug A, the partition wall 2 between the fixing grooves 16 is not provided.
Since the contact surfaces 0 and 43 are flat and the surfaces are merely abutted, insulation failure may occur. That is, in the case of the conventional harness plug A, since the contact surfaces A of the partition walls 20 and 43 are flat, the insulation distance between the blades 15 can be set only to the dimension a in FIG. If the cover 12 is deformed, a gap may be formed between the contact surfaces A.

[0005] 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 having excellent insulation between the blades.

[0006]

According to the present invention, in order to achieve the above object, a recess is formed in a front surface of a housing in which a harness connector is fitted and a plurality of blades protrude inside. The above-mentioned housing is constituted by the body and the cover which are divided in a divided form, and a plurality of fixing grooves for fixing the blade are formed on the inner wall of the concave portion facing the fitting direction of the harness connector over the body and the cover. The contact portion between the body and the cover between them is formed in a shape that increases the creepage distance in the direction in which the blades are arranged .
From the rear side, a gap separating adjacent blades in the housing
The wall protrudes along the fitting direction .

As a specific structure for increasing the creepage distance in the row direction of the blades of the abutting portion of the half body between the fixing grooves, for example , the abutting portion between the body and the cover is formed into an uneven fitting shape. It may be formed. Also, the body and cover are concave
It may be a half-split body that halves the place in half.

[0008]

According to the present invention, as described above, the contact distance between the fixing groove and the body and the cover is formed so as to increase the creepage distance in the direction in which the blades are arranged, thereby reducing the insulation distance between the blades. Wide , and between adjacent blades in the housing
The partition wall that separates the
More, it isolates between the plug pins adjacent in the housing, in which to not happen insulation failure.

[0009]

1 to 5 show an embodiment of the present invention. As described above, the housing 1 of the harness plug A according to the present embodiment has the concave portion 13 formed on the front surface thereof for fitting the connection portion 40 of the harness connector B therein.
3, the housing 1 is composed of a synthetic resin body 11 and a cover 12, as shown in FIG. 3. The body 11 and the cover 12 have either the front surface or the upper and lower surfaces opened. It has a box shape.

The interior of the body 11 is separated by a partition 20 into front and rear storage spaces, and the recess 13 is formed by a front recess 14. The partition wall 20 has three blades 15
Are formed with three fixing grooves 16 for press-fitting and fixing.
When the blade 15 is pressed into the fixing groove 16 and attached, the recess 1
The tips of the blades 15 are arranged in parallel in 4. Two partitions 18 running in the vertical direction are formed from the back of the partition 20, and the front part of the rear storage chamber is divided into three sections, and the rear end of the blade 15 in the separated section. Can be stored. At the rear end of the body 11, a recess 21 forming an electric wire outlet is provided.
A power cord 3 is provided on the bottom surface of the recess 21.
Two retaining ridges 22 are formed laterally.

The cover 12 has an internal structure of the body 11.
And a recess 14 of the body 11
A recess 13 is formed by fitting the connecting portion 40 of the harness connector B with the recess 27 formed corresponding to the recess 14, and a section into which each of the blades 15 of the body 11 is inserted, and a section corresponding to this section. Blade 15 by the section formed
And a recess 21 of the body 11,
The wire outlet is formed by the recess formed corresponding to the recess 21. At four places on both sides of the cover 12, insertion holes 23 through which staples 24 pass are formed.
Is passed through the insertion hole 23 and an insertion hole 26 formed in the body 11 so as to communicate with the insertion hole 23, and the cover 12 is attached to the body 11 by caulking. At this time, the blade 15 is completely fixed. You. On the upper bottom surface of the concave portion 27 of the cover 12, a vertically running ridge 25 is formed to fit into a concave groove (not shown) formed on the outer surface of the connection portion 40 of the harness connector B, and the harness plug A and the harness Reverse insertion with the connector B is prevented.

The cover 12 has a body 11
A partition 43 corresponding to the partition 20 is formed.
The contact portion between the 0, 43 fixing grooves 16 is formed in an uneven fitting shape as shown in FIG. That is, a step B is formed between the fixing grooves 16 of the partition walls 20 and 43, and each of the concave portions and the convex portions is formed in a shape to be fitted. In this way, the creepage distance between the fixing grooves 16 of the partition walls 20 and 43 can be increased at the portion where the step B is formed (the creepage distance is a + b, where b is the length of the step B).
Since the insulation distance between the blades 15 can be lengthened, and the deformation of the body 11 and the cover 12 can be absorbed by the step B, there is no gap between the contact portions, and therefore, insulation failure can be reduced. In this case, the creepage distance between the fixing grooves 16 is increased by forming a step, which is the simplest structure, but other structures may be employed to further increase the creepage distance.

Each of the blades 15 is formed of a plate-like conductive member, and is formed in the same shape. A caulking portion 17 is formed at the base end of these plug blades 15, and a three-core power cord (for example, VCT) having an earth wire is caulked to the caulking portion 17 with the core wire 31 a connected thereto. A temporary fixing portion 1 comprising a pair of front and rear temporary fixing pieces 19a is provided at a lower portion of a base end portion of the blade 15.
9 is formed. Ribs (not shown) project from the bottom surfaces of the respective partitions separated by the partition walls 18 of the body 11 corresponding to the temporary fixing portions 19, and the ribs are provided inside the respective temporary fixing pieces 19a. The blade 15 is temporarily fixed to each section of the body 11 by press-fitting into a nail formed at the end.

Here, in the case of the present embodiment, as for the blade 15 serving as a ground electrode, as shown in FIG.
It is shifted and attached so as to protrude forward from 5. By doing so, the protruding amount of the blade 15 as a ground electrode becomes large, and the blades 15 other than the blade 15 which becomes the ground electrode when the harness plug A is attached to and detached from the harness connector B.
Alone can be prevented from being connected to the harness connector B. That is, when the harness plug A is connected to the harness connector B, when the other blade 15 is connected to the harness connector B, the blade 1 as a grounding electrode must be connected to the other blade 15 without fail.
When the harness plug A is detached from the harness connector B, the other blade 15 is detached from the harness connector B, and then the blade 15 as a ground electrode is connected. Therefore, even if there is a short circuit, there is no electric shock. In addition, if the mounting position of the blade 15 as the ground electrode is shifted forward so as to be larger than the protruding amount of the other blades 15, all the blades 15 can be used as a common part.

A lock body 28 for fixing the connection with the harness connector B is mounted on the upper surface of the cover 12. The lock body 28 is formed of a flexible material such as a synthetic resin, has a ridge-shaped claw 30 running in the lateral direction on the lower surface of the leading edge, and has a cross-sectional shape projected from the center of the lower surface. On the lower surface of the horizontal piece of the L-shaped elastic piece 32, two fixing pieces 33 which are elastically locked to the cover 12 are provided vertically. The upper surface operated by a finger at the time of releasing the lock body 28 has a non-slip 34 formed of a plurality of laterally running ridges.
Is formed.

In the mounting portion 29 of the cover 12 to which the lock body 28 is mounted, a hole 36 communicating with the concave portion 27 is formed at a portion corresponding to the claw 30 of the lock body 28, and an elastic piece 32 is formed at the rear of the hole 36. Is formed, and an insertion hole 39 into which the fixing piece 33 is inserted is formed in the mounting recess 37. Further, a recess 38 is formed in the rear portion of the mounting recess 37 so that a finger can enter when the upper surface of the lock body 28 is pressed by the finger.

The mounting of the lock body 28 to the mounting portion 29 is performed as follows. First, the fixing piece 33 of the lock body 28 is inserted into the insertion hole 39, and then the elastic piece 32 is mounted on the mounting recess 37 so that the rear end face is locked to the step behind the mounting recess 37. When it is placed, the claw formed on the lower front surface of the fixing piece 33 is locked to the cover 12 as shown in FIG. Here, in the case of the present embodiment, the step at the rear end of the mounting recess 37 and the insertion hole 39
The distance from the rear end surface of the elastic piece 32 to the front surface of the base of the fixing piece 33 is formed slightly larger than the distance between the front opening edge of the elastic piece 32 and the mounting recess 37 of the mounting piece 37 in the horizontal piece of the elastic piece 32. A forward elastic force is applied by the step portion, so that the fixing piece 33 is securely locked.

When the harness plug A having the above structure is connected to the harness connector B, the position of the recess 13 of the harness plug A and the connection portion 40 of the harness connector B are aligned, and the harness plug A is pushed onto the harness connector B. When hit, the blade 15 of the harness plug A is inserted into the blade insertion opening formed on the front end surface of the connection portion 40 of the harness connector B, and the blade 15 contacts the blade receiving spring provided inside the harness connector B. The connection is made.

The connecting portion 40 of the harness connector B
Is completely pushed into the concave portion 13 of the harness plug A, the concave streak 41 formed on the outer surface of the connection portion 40 as shown in FIG.
The hook 30 of the lock body 28 engages with the harness plug A
Is prevented from coming off. When removing the harness plug A from the harness connector B, when the rear end of the lock body 28 is pushed into the recess 38, the lock body 28 rotates about the base end of the elastic piece 32 as a fulcrum, The locked state with the concave streak 41 is released. At this time, the harness plug A can be detached from the harness connector B by pulling the harness plug A backward.

This kind of harness plug A is used, for example, in the following floor wiring system. In this floor wiring system, as shown in FIG. 5, a floor surface is formed at regular intervals on a slab of a building, and floor wiring is performed using a space between the slab and the floor surface, so-called free access. This is called a floor. In this free access floor, a plurality of outlets C are embedded in the floor, and wiring devices H and I such as a plurality of outlets are arranged on the floor. Here, the power cords of the wiring devices H and I are drawn under the floor in the demarcation box D. The outlet C and wiring accessories H, the tip of the power cord I is attached to the harness plug A according to the present embodiment, the jointers B 'for further branching the branch circuit that branches the trunk L ₀ in the joint box J By connecting the harness plug A, floor wiring can be freely performed. In addition,
Jointers B 'of the harness plug A is connected is provided with provided with a connection portion mains L ₀ of the power supply or the like is connected fast binding equation, a plurality of connecting portions 40 became similar structure and the harness connector B Things. When simply connecting the power supply line to the wiring devices H and I or extending the power supply line, the harness connector B may be attached to the power supply side, and the harness plug A may be attached to the other end.

[0021]

As described above, the present invention forms a recess on the front surface of the housing into which the harness connector is fitted and into which a plurality of blades protrude, and separates the body and cover by dividing the recess. And constitute the above housing,
A plurality of fixing grooves for fixing the blade are formed on the inner wall of the recess facing the fitting direction of the harness connector over the body and the cover, and the contact portions of the body and the cover between the fixing grooves are arranged in rows of the blade. In the shape of increasing the creepage distance in the direction, and adjacent to each other in the housing from the rear surface of the inner wall.
A partition wall that separates the blades is projected along the fitting direction.
Because are, contact between the body and the cover between the clamping groove
Shape to increase the creepage distance in the direction in which the blades are arranged
By forming, so it is possible to increase the insulation distance between the plug pins, is
In addition, a partition wall that separates adjacent blades in the housing
By projecting along the fitting direction, the housing
Since between the plug pins adjacent in the inner is isolated, hardly cause insulation failure.

[Brief description of the drawings]

FIG. 1A is a front view of an embodiment of the present invention. (B) is a top view in the state where the cover side same as the above was removed.

FIG. 2 is a perspective view of the same harness plug.

FIG. 3 is an exploded perspective view of the same.

FIG. 4 is a partial cross-sectional view showing a retaining structure of a harness plug.

FIG. 5 is an explanatory diagram of a free access floor in which the harness plug is used.

FIG. 6 is a front view of a conventional harness plug.

[Explanation of symbols]

 Reference Signs List A Harness plug B Harness connector 1 Housing 11 Body 12 Cover 13 Concave portion 15 Plug blade 16 Fixing groove 20, 43 Partition wall A Contact surface B Step

Claims (3)

(57) [Claims] 1. A housing in which a harness connector is fitted and in which a plurality of blades protrude is formed in the front surface of the housing, and the housing is constituted by a body and a cover which are divided so as to divide the recess. A plurality of fixing grooves for fixing the blade are formed on the inner wall of the recess facing the fitting direction of the harness connector over the body and the cover, and the contact portions of the body and the cover between the fixing grooves are arranged in rows of the blade. Formed in a shape that increases the creepage distance in the direction,
From the surface, a partition wall that separates adjacent blades in the housing
Characterized by projecting along the fitting direction . 2. The harness plug according to claim 1, wherein a contact portion between the body and the cover is formed in a concave-convex fitting shape so as to increase a creepage distance in a direction in which the blades are arranged. 3. The harness plug according to claim 1, wherein the body and the cover are half-split bodies that divide the recess into two.