JP3015160B2 - Outlet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outlet provided with a door for closing a blade insertion slot when a blade of a plug is not inserted.

[0002]

2. Description of the Related Art Conventionally, an outlet provided with a door for opening and closing a blade insertion port so that foreign matter such as dust or water does not enter the blade insertion port when the plug blade is not inserted. Is provided. In particular, in the case of an outlet that is exposed on the floor surface and the blade insertion port is opened upward, foreign matter from above easily enters the blade insertion port, so that the door that closes the blade insertion port when not in use is closed. Is required.

[0003]

However, in the outlet provided with a door provided conventionally, a plug blade formed in a flat plate shape is usually inserted and removed in a straight line, and the plug is rotated to be pulled out. There is no form to stop. Although it is possible to form a door corresponding to a blade that locks the plug by turning it, it is necessary to design a door with a different shape depending on the type of blade, resulting in an increase in the number of parts and production. There is a problem that it leads to an increase in cost.

An object of the present invention is to solve the above-mentioned problems, and there are two types, namely, a type in which a plug blade formed in a flat shape is inserted and removed in a straight line, and a type in which a plug is rotated to prevent the plug from being removed. Also, it is intended to provide an outlet which can be handled by the same parts and suppresses an increase in manufacturing cost by sharing parts.

[0005]

According to the first aspect of the present invention, a plurality of blade insertion holes into which the blades of the plug are inserted are opened on one side of the case, and the openings of the respective blade insertion holes are formed inside the case. Doors that move in the direction along the plane to open and close each
The case includes a body having a front opening and first flange portions on both sides, a second flange portion disposed on the front side of the body and overlapping the first flange portion, and a plug blade insert. An attachment frame formed by coupling a cover having an opening to the opening and screwed with an assembly screw inserted from the first flange portion through the second flange portion is provided on a front surface of the second flange portion, respectively. Each mounting frame is provided with a mounting portion for mounting a fixing tool for fixing to a wall surface or the like, and at least a blade of a blade insertion port into which a blade for power supply is inserted is in a direction of closing the blade insertion hole, and is mutually closed. A front end edge of the inclined surface, which is urged by a return spring made of a leaf spring in a direction approaching the front end, and converts the insertion force of the blade into a force for opening the door against the spring force of the return spring; Is in the plane along the opening of the blade insertion port With each other to curved shape concave arc.

According to a second aspect of the present invention, there is provided a pair of rectangular blade insertion holes into which a flat blade for power supply is inserted, and a blade insertion hole into which a ground blade is inserted. It is.
According to the third aspect of the present invention, the blade insertion port is formed in a shape curved in an arc shape.

[0007]

According to the structure of the first aspect, the door is urged by the return spring composed of a leaf spring in the direction in which the blade insertion port is closed, and the insertion force of the blade is prevented against the spring force of the return spring. The door is provided with an inclined surface that converts the force into the opening direction, and the leading edge of the inclined surface is curved in a concave arc shape in a plane along the opening surface of the blade insertion port, so that it is formed in a flat plate shape. The same configuration of the door and the return spring can be used not only in the case of inserting and removing in a straight line, but also in the case of inserting a flat blade or hooking blade into the blade insertion slot and then rotating it. You can. That is, when the blade moves straight against the blade insertion slot, the door can be opened and closed by the function of the inclined surface. In addition, when the blade is rotated in the blade insertion port by bending the leading edge of the door that the blade contacts with in a concave arc shape, the compression amount of the return spring is substantially constant during rotation of the blade. , And the blade can be smoothly rotated with the force acting on the blade being substantially constant. Furthermore, since the case is formed by connecting the body and the cover with the assembly screws that are screwed into the mounting frame, assembly of the case and connection of the mounting frame can be performed only with the assembly screws. The case with the mounting frame can be easily assembled with a small number of parts.

[0008] Claims 2 and 3 are preferred embodiments.

[0009]

【Example】

(Embodiment 1) As shown in FIG. 1, a case 11 has a rectangular parallelepiped body 11a which houses blade receiving springs 12 and 13 for receiving a plug blade of a plug and has an open top surface, and is arranged so as to close the opening of the body 11a. It is formed by combining a cover 11b having a blade insertion port 14a, 14b into which a plug blade of a plug is inserted. That is, the body 11a has the first
The cover 11b has a second flange 11d on both sides overlapping the front surface of the first flange 11c.
An assembly screw 19 inserted from 1c to the second flange portion 11d is screwed into a pair of mounting frames 10 overlapping the front surface of the second flange portion 11d to thereby form the body 11a.
And the cover 11b are connected. Cover 11b
A protruding base 11e protrudes between the two flange portions 11d on the front surface of the protruding base 11e.
4b is opened. This outlet is provided with a grounding electrode so that a pair of flat blades for parallel power supply and a round bar-shaped blade for grounding can be connected to each other.
b, two blade insertion holes 1 into which a power blade is inserted.
4a and one blade insertion slot 1 into which a grounding blade is inserted.
4b is open. Each mounting frame 10 is arranged in such a manner that an edge thereof abuts on a step formed between the second flange 11d and the protruding base 11e, and is prevented from rotating around the assembly screw 19. . In addition, in each of the mounting frames 10, a long hole-shaped mounting hole 10a for inserting a box screw to be screwed into an embedding box for wiring equipment such as a switch box, and a peripheral edge of an opening formed in a wall panel or the like are mounted. A mounting portion such as a bracket mounting hole 10b for mounting a clip for fixing to a wall panel or the like by being sandwiched between the frames 10 and a fixing hole 10c for inserting a wood screw or the like for directly attaching to a wall or the like is formed. Further, a screw hole 10d into which a plate screw for attaching a decorative plate covering the front surface of the attachment frame 10 is formed. Here, it is desirable that the interval between the mounting holes 10a in both the mounting frames 10 is set to a dimension that can be mounted in a standardized box for wiring equipment.

In the body 11a, three independent chambers are formed, and a pair of spring pieces 12a arranged opposite to each other and a terminal plate 12 arranged beside the spring pieces 12a.
b, two blade receiving springs 12 integrally formed by a conductive sheet metal, a pair of spring pieces 13a opposed to each other, and a terminal plate 13b coupled to a connecting portion of the two spring pieces 13a. And one blade receiving spring 13 integrally formed of a conductive sheet metal is housed in each chamber. Lock springs 12c, 13c are arranged opposite to the terminal plates 12b, 13b of the blade receiving springs 12, 13, respectively. Lock spring 1
The wires 2c and 13c bite into the wire inserted through a wire insertion hole (not shown) formed in the lower wall of the body 11a and hold the wire between the terminal plates 12b and 13b in such a manner as to prevent the wire from coming off. Release buttons 12f and 13f are provided at positions corresponding to the locking springs 12c and 13c, respectively, and a driver tip inserted through a release hole (not shown) formed in the lower wall of the body 11a. When the release buttons 12f, 13f are pressed by a tool, the locking springs 12c, 13c are detached from the electric wires, so that the electric wires can be pulled out. That is, the terminal plates 12b, 13b and the locking spring 12
A well-known quick connection terminal is constituted by c and 13c and the release buttons 12f and 13f.

On the other hand, in the cover 11b,
Doors 15a, 1b are provided on the lower surface of the portions corresponding to 4a, 14b.
5b is provided. One door 15a is provided for each of the blade insertion ports 14a, and two doors 15b are provided for each of the blade insertion ports 14b. The doors 15a are urged toward each other by return springs 16a, each of which is a leaf spring curved in an arc shape, so as to close the blade insertion port 14a. The doors 15b are urged toward each other by return springs 16b formed of coil springs so as to close the blade insertion slot 14b. A spring seat projection 15c coupled to one end of the return spring 16b protrudes from one end surface of the door 15b in the moving direction, and a movement restricting projection 15d protrudes from both side surfaces of the door 15b. Doors 15a, 15b, return springs 16a, 16b
Is a storage recess 17a formed on the lower surface of the cover 11b.
(See FIGS. 2 and 3). Each door 15a, 1
5b is formed with an inclined surface 15f, and the force acting downward on the inclined surface 15f when the plug blade 20 is inserted,
As shown in FIGS. 2 and 3, return springs 16a, 16b
The doors 15a and 15b move in the horizontal direction against the spring force of (1), and open the blade insertion ports 14a and 14b. The tip edge of the inclined surface 15f of the door 15a is curved in a concave arc shape. On the lower surface of the cover 11b, doors 15a, 15b housed in the housing recess 17a, return springs 16a, 16b
The holding plate 18 is attached to prevent the falling off of the lower part. The pressing plate 18 is held by the cover 11b by a peripheral portion engaging a coupling claw (not shown) protruding from the lower surface of the cover 11b. When the cover 11b is connected to the body 11a, the presser plate 18 prevents the blade receiving springs 12a and 12b from rising. In the holding plate 18, through holes 18a and 18b through which the plug blade 20 of the plug is inserted are formed in substantially the same shape as the blade insertion ports 14a and 14b.

(Embodiment 2) This embodiment relates to FIGS.
As shown in the figure, the blade insertion ports 14a, 14b are curved in an arc shape, and the blade of the plug is connected to the blade insertion ports 14a, 14b.
The plug is prevented from coming off by rotating it after inserting it into 14b. That is, at least one of the pair of spring pieces 12a provided on the blade receiving spring 12 to which the power supply flat blade 20 is connected, the spring piece 12
A locking projection (not shown) protruding from the opposing surface of a is provided, and the locking projection is engaged with a locking hole (not shown) formed in the blade 20. This blade receiving spring 12
After inserting the blade 20 between the pair of spring pieces 12a from above at a portion where the locking projection is not formed, the blade 20 is rotated while holding the blade 20 between the spring pieces 12a. The locking holes provided in the plug blade 20 are configured to engage with the locking projections. When the blade 20 is engaged with the locking projection, the blade 20 is prevented from falling upward.
Here, since the blade 20 is rotated while being sandwiched between the pair of spring pieces 12a, the horizontal cross section of the spring piece 12a is curved in an arc shape. Also, the blade piece 13a of the blade receiving spring 13 to which the grounding blade is connected is curved so that the blade 20 can rotate.

The doors 15a and 15b are the same as those in the first embodiment. Here, the inclined surface 15 of the door 15a
Since the tip line of f is curved in a concave arc, FIG.
When the blade 20 is inserted as shown in FIG. 6 and the blade 20 is rotated as shown in FIG. 6, the amount of compression of the return spring 16a is substantially constant, and the blade 20 is rotated smoothly. You can do it. Also, of the pair of return springs 16b for the door 15b, the blade 20 is viewed from the position in FIG.
Return spring 16a which is extended when returning to the position of 5 (b)
(The left side in FIG. 4) has a longer natural length than the compressed return spring 16b. This makes it easier for the door 15b to follow the rotation of the blade 20.

A through hole 18a formed in the holding plate 18
18b is a blade insertion port 14 formed in the cover 11b.
Like a and 14b, the blade is formed in an arc shape so that the blade can rotate. Here, the blade is designed to rotate clockwise to engage with the locking projection, and the blade insertion port 14 is designed.
a, 14b and the through holes 18a, 18b are formed at positions deviated counterclockwise. Therefore, the blade insertion port 14
a, Insert the blade of the plug into the right end of 14b,
By rotating the plug around , the plug blade engages with the locking projection to prevent the plug from coming off.

The other configuration and operation are the same as those of the first embodiment, and the description is omitted. (Embodiment 3) This embodiment corresponds to a plug having a hook blade as shown in FIGS. The hooking blade 21 has a well-known shape in which a hooking piece 21a protrudes from a side edge of a distal end portion (see FIGS. 8 and 9).
The cross section has an arcuate shape. By rotating the hooking blade 21 after inserting it through the plug insertion openings 14a and 14b, the hooking piece 21a engages with the inside of the case 11 to prevent the plug from coming off. In this embodiment, the blade for grounding is also used as the hooking blade 21.
It has become. Embodiment 2 is applied to the blade receiving springs 12a and 12b.
The same shape as described above is used, and the blade insertion port 14a, 1
4b and the through-holes 18a, 18b are formed in a shape that allows the hooking blade 21 to be inserted and rotated. Further, since the blade for grounding is the hook blade 21, the door 15 b is
The return blade 16a is formed in the same shape as 5a and is urged in a direction to close the blade insertion port 14b by a return spring 16b formed of a leaf spring having the same shape as the return spring 16a for urging the door 15a.

In this configuration, the hooking blade of the plug is inserted into the center of the blade insertion opening 14a, 14b, and the plug is rotated clockwise , so that the hooking pieces are formed in the through holes 18a, 18b. The plug is locked to the periphery of the opening to prevent the plug from coming off. That is, the peripheral edges of the openings of the through holes 18a and 18b function as locking portions. Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

As described above, various types of outlets are formed by curving the tip edge of the inclined surface 15f provided on the door 15a for opening and closing the blade insertion slot 14a into which the power blade is inserted. , The door 15a and the return spring 16
Since a can be shared, even when multiple types are developed, it is possible to suppress an increase in component types and a cost increase.

[0018]

As described above, according to the present invention, the return spring made of a leaf spring urges the door in the direction to close the blade insertion slot, and the insertion force of the blade against the spring force of the return spring. Provide the door with an inclined surface that converts the force to open the door, and
Since the tip edge of the inclined surface is curved in a concave arc shape in the plane along the opening surface of the blade insertion port, it is not only a form that is formed in a flat plate and it can be pulled out and inserted in a straight line, but also a flat blade and a hook Even in a case where the blade is inserted into the blade insertion slot and then rotated, there is an advantage that the door and the return spring having the same configuration can be used. That is, when the blade moves straight against the blade insertion slot, the door can be opened and closed by the function of the inclined surface. In addition, when the blade is rotated in the blade insertion port by bending the leading edge of the door that the blade contacts with in a concave arc shape, the compression amount of the return spring is substantially constant during rotation of the blade. And it is possible to smoothly rotate the blade while keeping the force acting on the blade substantially constant. Furthermore, since the case is formed by connecting the body and the cover with the assembly screws that are screwed into the mounting frame, assembly of the case and connection of the mounting frame can be performed only with the assembly screws. There is also an advantage that the case can be easily assembled with a small number of parts.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment.

FIGS. 2A and 2B show a state before insertion of a blade according to the first embodiment, wherein FIG. 2A is a sectional view of a main part, and FIG.

3A and 3B show a state after the insertion of the blade according to the first embodiment, wherein FIG. 3A is a sectional view of a main part, and FIG. 3B is a bottom view of the main part.

FIG. 4 is an exploded perspective view showing a second embodiment.

FIGS. 5A and 5B show a state before rotation of a blade according to a second embodiment, in which FIG. 5A is a sectional view of a main part, and FIG.

FIG. 6 is a bottom view of a main part showing a state after the rotation of the blade according to the second embodiment.

FIG. 7 is an exploded perspective view showing a third embodiment.

8A and 8B show a state before insertion of a blade according to the third embodiment, wherein FIG. 8A is a sectional view of a main part, and FIG. 8B is a bottom view of a main part.

9A and 9B show a state after insertion of a blade according to the third embodiment, wherein FIG. 9A is a sectional view of a main part, and FIG. 9B is a bottom view of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mounting frame 11 Case 11a Body 11b Cover 11c 1st flange part 11d 2nd flange part 12 Blade receiving spring 13 Blade receiving spring 14a Blade insertion hole 14b Blade insertion hole 15a Door 15b Door 15f Inclined surface 16a Return spring 16b Return spring 19 assembly screw 20 blade 21 hook blade

Claims (3)

(57) [Claims] A plurality of blade insertion holes into which a blade of a plug is inserted are opened on one surface of the case, and each blade moves inside the case in a direction along the opening surface of each blade insertion hole. A door is provided for opening and closing the insertion opening , the case has a body having a front opening and first flanges on both sides, and a second body disposed on the front side of the body and overlapping the first flange. A mounting frame, which is formed by coupling a cover having a second flange portion and an opening for a blade insertion opening, into which an assembly screw inserted from the first flange portion through the second flange portion is screwed, is provided. Each of the mounting frames is provided on the front surface of the flange portion, and each mounting frame has a mounting portion for mounting a fixing tool for fixing to a wall surface or the like. Leave the leaf springs in the direction of closing the insertion port and approaching each other. And a biasing surface for converting the insertion force of the blade into a force for opening the door against the spring force of the return spring. An outlet characterized by being curved in a concave arc shape in a plane along an opening surface of the outlet. And a pair of rectangular blade insertion holes into which a power supply flat blade is inserted, and a blade insertion hole into which a grounding blade is inserted. The outlet according to claim 1, 3. The outlet according to claim 1, wherein the blade insertion port is formed in an arcuate shape.