JP2942262B2 - Retainable outlet with embedded ground electrode - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining socket with an embedded ground electrode.

[Prior Art] Conventionally, there have been provided plug-in type outlets with grounding electrodes and plug-in retaining outlets. By the way, many AO devices and medical devices have a plug with a parallel blade that requires grounding, and there is a possibility that serious trouble may occur if the plug is accidentally pulled out during use. Therefore, although the former conventional example has a ground electrode, the plug is easily pulled out, and the latter conventional example has a function of preventing the plug but does not have the ground electrode.
Therefore, an outlet having a ground electrode and a plug that cannot be easily removed is required.

[Problem to be Solved by the Invention] The present invention has been provided in view of the above points,
It is an object of the present invention to provide an embedded outlet having a grounding electrode, which has a grounding electrode and does not easily come out of a plug even if a cord is hooked or carelessly pulled.

Means for Solving the Problems According to the present invention, an earthing wall made of a leaf spring material is provided on one side of the space which is provided with an insulating wall which is open at the front surface and bisects both ends of the inside and is separated by the insulating wall. A first storage portion for storing the electrode blade receiving spring is formed, and the partition wall is formed at substantially the center of the insulating wall in the space on the other side and at a substantially right angle to the insulating wall at least approximately in the middle of the space on the other side. A body provided with second and third storage portions for extending and receiving power supply blade receiving springs made of a leaf spring material on both sides of the partition wall; and a power supply cover attached to an opening of the body. A cover with a pair of power blade insert holes into which the blades are respectively inserted and a ground electrode blade insert hole into which the ground electrode plug blade is inserted, and a body and cover that are standardized. Outlet body formed to the size of one wiring device and the power receiving blade receiving springs. It is bent and formed from one leaf spring material and integrated with each blade receiving spring,
A pair of terminal plates housed in cavities communicating with the second and third housings, and bent and formed from the same leaf spring material as the ground electrode blade receiving spring to be integrated with the ground electrode blade receiving spring; And a terminal plate housed in the first housing portion, and a lock spring disposed inside each terminal plate so as to be surrounded by the terminal plate and elastically contacting an electric wire inserted from outside with the terminal plate. ,
A release button which is disposed in the body to release the contact between the terminal plate and the electric wire by pressing the corresponding locking spring, and the release button is placed on a step formed at both ends of the front surface of the cover and is placed from both sides. A pair of assembly frames for connecting the cover to the body by engaging the ends of both side pieces extended along both side surfaces of the body with the body, and an attachment formed on an assembly frame placed on the step portion; A locking claw for locking to the frame is provided, and a power blade insert hole and a ground electrode blade insert hole are provided so that the blade inserted in each hole can move when the plug is rotated. While being formed in an arc shape, the tip shape of the pair of power blade receiving springs and the ground electrode blade receiving springs is formed in an arc shape in accordance with each insertion hole,
The power supply blade receiving spring is provided with a projection which locks with a locked step provided on the power blade received in the power blade receiving spring when the blade is rotated to prevent the insertion of the blade. is there.

[Operation] A grounding terminal plate for grounding is provided in addition to the pair of power supply terminal plates to provide a grounding pole, and a plug blade of a plug is inserted into the power supply terminal plate and rotated by the rotation of the plug blade so as to be latched. To prevent the plug from coming off easily from the blade receiving spring. Furthermore, the power supply, the ground terminal plate, the locking spring and the release button make the connection terminal structure easy to construct, and The size of the outlet body consisting of the body and the cover is set to the size of one standardized wiring device, and is easily attached to the mounting frame provided on the construction surface by the locking piece provided on the assembly frame. It can be attached, and a plurality of outlet bodies can be connected in series.

Further, both side pieces of the assembling frame are fitted into grooves formed in the cover and the body, and tips of the both side pieces protruding from the end on the body side are hooked and engaged with the edges of the groove. Are fitted in the grooves, so that the mounting position of the assembly frame can be determined, and the assembly frame can be prevented from coming off easily.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the whole, in which the inside of a box-shaped body 12 made of an insulating material and having an open upper surface is divided into two parts by insulating walls at both ends, and one side is partitioned by the insulating walls. First
A storage recess 22c serving as a storage portion is formed, and the partition wall 21 extends from substantially the center of the insulating wall in the other side of the space at a right angle to the insulating wall at least halfway through the other side of the space. The storage recesses 22a and 22b, which are second and third storage portions, are formed on both sides of the storage device. The storage recesses 22a and 22b communicate with each other at the end. Power supply terminal plates 2 are disposed in the storage recesses 22a and 22b, respectively, and a blade receiving spring 1 formed in an arc shape is provided on one end side of the power supply terminal plate 2. The blade receiving spring 1 is composed of two spring plates 1a and 1b, and one of the spring plates 1a is provided with a projection 11 for inserting, for example, an L-shaped tip of a plug blade of a plug to be rotated by being hooked.
Is protruding. The blade receiving springs 1 formed in an arc shape are arranged concentrically. The other end side of the power supply terminal plate 2 is provided with a U-shaped terminal portion 23, and the blade receiving spring 1 side is used as a contact plate 6, and the lock springs 5 are arranged facing the contact plate 6. You. A conductor of an electric wire from outside is inserted between the locking spring 5 and the contact plate 6, and the locking spring 5 resiliently contacts the conductor to bring the conductor into contact with the contact plate 6 to obtain conduction. . A release button 7 for driving the two locking springs 5 is disposed between the two terminal portions 23, and is pressed from the outside to release contact of the conductor with the contact plate 6.

A similar arc-shaped blade receiving spring 3 is provided at one end of the ground terminal plate 4.
A terminal portion 24 connected to a conductor of an external electric wire is formed on the other end side. The ground terminal plate 4 is housed in the housing recess 22c of the body 12, and has a locking spring 8 and a release button corresponding to the contact plate 9 formed on the terminal portion 24 of the ground terminal plate 4. 10 is also arranged in the storage recess 22c. The pair of power supply terminal plates 2 and the blade receiving springs 1 and 3 of the ground terminal plate 4 are formed in an arc shape as described above, and are arranged concentrically. Therefore, even when the plug is rotated, the blade and the blade receiving springs 1 and 3 always maintain contact. An electric wire insertion hole into which a conductor for connecting to the power supply terminal plate 2 and the ground terminal plate 4 is inserted is formed in the bottom of the body 12.

A cover 14 made of an insulating material covers the opening surface of the body 12 and has an arc-shaped blade insertion hole into which a power blade is inserted.
13a and a blade insertion hole 13b into which a grounding blade is inserted are respectively formed. Grooves 26 are recessed on both sides of the step portion 25 at both ends of the cover 14, and an assembly frame 15 for assembling and combining the cover 14 and the body 12 through the grooves 26 is mounted. . The assembly frame 15 is formed in a substantially U-shape,
15a is attached to the grooves 26 and 27 of the cover 14 and the body 12, and the tip of the crack is twisted outward and hooked and locked at the opening edge of the groove 27, so that the cover 14 and the body 12 can be assembled. It is. In addition, a locking piece 16 protrudes integrally from an edge of the assembly frame 15. The locking piece 16 allows the frame to be detachably attached to a mounting frame attached to an embedding box or the like on the construction surface. In addition, the size of the outlet main body A formed by connecting the cover 14 and the body 12 is the size of one standardized wiring device. Therefore, when the outlet main body A is required, an arbitrary number can be connected to the mounting frame.

FIG. 2 shows the plug 18, and the tip of the power supply blade 19 is L
The locking piece 19a of the mold is formed, and the blade 19 is
When inserted and rotated, the locking piece 19a is hooked on the projection 11 of the blade receiving spring 1 so that the blade 19 does not easily come off. The plug 18 also has a grounding blade 20 protruding therefrom.

FIG. 3 is a plan view of a main part showing the power supply terminal plate 2 and the release button 7.
One release button 7 and two locking springs 5 are pressed against each other. When the release button 7 is arranged outside the terminal portion 23, the size of the release button 7 becomes large because the release button 7 protrudes outward. Therefore, by arranging as in the present embodiment, the size of the outlet main body A can be reduced to the size of one standardized wiring device, and the size of the outlet main body A can be reduced.

FIG. 4 is an enlarged sectional view of a portion in which the pressing plate 17 is formed from the base of the blade receiving spring 1. The pressing plate 17 is formed in an L-shape, and its horizontal piece 17a and the bottom of the blade receiving spring 1 are connected. Both members 2
The vertical piece 17b is fixed at 8, and stands upright in parallel with the vicinity of the spring plate 1a on which the projection 11 is provided. The upper end of the holding plate 17 is covered
The blade receiving spring 1 is held and fixed by being pressed by 14. By reducing the distance l between the spring plate 1a of the blade receiving spring 1 and the pressing plate 17, that is, by reducing the distance l between the position where the force acts by the plug blade 19 and the position of the pressing by the cover 14, the blade 1 The torque acting on the receiving spring 1 is reduced. Therefore, the torque acting on the blade receiving spring 1 is reduced, the position of the blade receiving spring 1 is stabilized, the deformation of the blade receiving spring 1 can be prevented, and the space can be saved.

[Effects of the Invention] As described above, the present invention provides an earthing wall made of a leaf spring material in a space on one side which is provided with an insulating wall which is open at the front surface and bisects both ends of the inside and is separated by the insulating wall. A first storage portion for storing the electrode blade receiving spring is formed, and the partition wall is formed at substantially the center of the insulating wall in the space on the other side and at a substantially right angle to the insulating wall at least approximately in the middle of the space on the other side. A body provided with second and third storage portions for extending and receiving power supply blade receiving springs made of a leaf spring material on both sides of the partition wall; and a power supply cover attached to an opening of the body. A standardization consisting of a cover with a pair of power blade insert holes into which the blades are respectively inserted and a ground electrode blade insert hole into which the ground electrode blade is inserted, and a body and a cover. Outlet body formed to the size of one wiring device and the same power receiving blade receiving springs, respectively. A pair of terminal plates, which are formed by bending from a plate spring material and are integrated with the respective blade receiving springs and are housed in cavities communicating with the second and third housing portions, are the same as the ground electrode blade receiving springs; A terminal plate that is formed by bending from a plate spring material and is integrated with the ground electrode blade receiving spring, and is disposed in the first storage portion so as to be surrounded by the terminal plate inside each of the terminal plates; A lock spring for elastically contacting an electric wire inserted from the outside with the terminal plate, a release button disposed in the body to press the corresponding lock spring to release contact between the terminal plate and the electric wire, and the cover A pair of assembling members which are mounted on the steps formed at both ends of the front surface and extended from both sides so as to extend along both side surfaces of the body, the tips of both side pieces are engaged with the body and the cover is connected to the body. A frame, and an attachment formed on an assembly frame placed on the step portion. The power supply blade insertion hole and the ground electrode blade insertion hole are circular so that the blade inserted in each hole can move when the plug is rotated. In addition to being formed in an arc shape, the tip shape of the pair of power blade receiving springs and the ground electrode blade receiving springs is formed in an arc shape according to each insertion hole, and inserted into the power blade receiving spring when the plug blade rotates. The power receiving blade receiving spring is provided with a projection that locks to the locked step provided on the blade to be locked and prevents the blade from coming off. A grounding terminal plate is provided to provide a grounding pole, and a plug terminal is provided at the power terminal end with a projection for engaging and locking the plug blade by inserting and rotating the plug blade so that the plug is easier than the blade receiving spring. So that you do not
The plug blade can be provided with a retaining function and a grounding pole function. Furthermore, the power supply and grounding terminal plate can be easily constructed as a quick-connecting terminal structure with the contact plate, a locking spring and a release button. The size of the outlet main body composed of the cover and the size of one standardized wiring device can be easily attached to the mounting frame provided on the construction surface by the locking piece provided on the assembly frame. To be able to do it, and
This has an effect that a plurality of outlet main bodies can be connected in series.

Further, both side pieces of the assembling frame are fitted into grooves formed in the cover and the body, and tips of the both side pieces protruding from the end on the body side are hooked and engaged with the edges of the groove. Since both side pieces are fitted in the grooves, there is an effect that the mounting position of the assembly frame is determined and the assembly frame can be hardly detached.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of the entire embodiment of the present invention, FIG. 2 is a perspective view of the plug, FIG. 3 is a plan view of the main part of the same, and FIG. 4 is a sectional view of the main part of the same. . DESCRIPTION OF SYMBOLS 1 ... Blade receiving spring, 1a, 1b ... Spring plate, 2 ... Power supply terminal plate, 3 ... Blade receiving spring, 4 ... Ground terminal plate, 5 ... First locking spring, 6 ... Contact Plate, 7 First release button, 8
Second lock spring, 9 contact plate, 10 second release button,
11 ... projection, 12 ... body, 13 ... blade insertion hole, 14 ...
Cover, 15: Assembly frame, 16: Locking piece, 17: Holding plate, 18: Plug, 19, 20 ... Plug blade.

Continuation of the front page (56) References JP-A-49-15983 (JP, A) JP-A 62-71879 (JP, U) JP-A 55-133579 (JP, U) JP-A 55-173221 (JP, U) , U) Japanese Utility Model Showa 61-70381 (JP, U) Japanese Utility Model Showa 45-13227 (JP, Y1)

Claims (2)

(57) [Claims] 1. An insulating wall having an opening at the front surface and bisecting both ends of the inside thereof is provided. A blade receiving spring for a grounding electrode made of a leaf spring material is accommodated in one space partitioned by the insulating wall. A first storage portion is formed, and a partition wall is extended from substantially the center of the insulating wall in the space on the other side at a substantially right angle to the insulating wall to at least approximately the center of the space on the other side, and is provided on both sides of the partition wall. A body provided with second and third storage portions for respectively storing power supply blade receiving springs made of a leaf spring material, and a pair of power supply blades which are attached to openings of the body and into which power supply blades are respectively inserted. A cover having a power blade insert hole and a ground electrode blade insert hole into which a ground electrode plug blade is inserted, each having a front opening, and a body and a cover for one standardized wiring device. An outlet body formed in a size, and each of the power receiving blade receiving springs and the respective leaf spring material are bent and formed from the same leaf spring material. It is to become a blade receiving springs integral with respective
A pair of terminal plates housed in cavities communicating with the second and third housings, and bent and formed from the same leaf spring material as the ground electrode blade receiving spring to be integrated with the ground electrode blade receiving spring; A terminal plate accommodated in the first accommodating portion, and a lock spring disposed inside each terminal plate so as to be surrounded by the terminal plate and elastically contacting an electric wire inserted from outside with the terminal plate. ,
A release button which is disposed in the body to release the contact between the terminal plate and the electric wire by pressing the corresponding locking spring, and the release button is placed on a step formed at both ends of the front surface of the cover and is placed from both sides. A pair of assembly frames for connecting the cover to the body by engaging the ends of both side pieces extended along both side surfaces of the body with the body, and an attachment formed on an assembly frame placed on the step portion; The power supply blade insertion hole and the ground electrode blade insertion hole are provided with a locking claw for locking to the frame so that the blade inserted in each hole can move when the plug is rotated. While being formed in an arc shape, the tip shape of the pair of power blade receiving springs and the ground electrode blade receiving springs is formed in an arc shape in accordance with each insertion hole,
The power blade receiving spring is provided with a projection that locks with a locked step provided on the blade inserted into the power blade receiving spring when the blade rotates, thereby preventing the blade from coming off. Features a recessed outlet with a built-in ground electrode. 2. Both sides of the assembly frame are fitted into grooves formed in the cover and the body, and the tips of both sides protruding from the ends on the body side are engaged with the edges of the grooves. The retaining outlet with an embedded grounding electrode according to claim 1.