JPH066468Y2 - Power connection device - Google Patents

Description

The present invention relates to a power supply connection device having a ground connection.

2. Description of the Related Art Conventionally, as a power supply connecting device of this type, there is one as shown in FIG. 7, in which a pair of power supply terminals 102 are movably provided on both sides of a plug case 101. A spring 103 that biases the spring 102 is provided. A ground terminal 104 is movably provided in the center of the plug case 101, and
A spring 105 that biases the ground terminal 104 is provided. The power terminal 102 is the power cord 1.
06, and the ground terminal 104 is connected to the ground cord 107. Also, plug case 1
01 is provided with a permanent magnet 108, and the magnetic plate 109 that is in close contact with the permanent magnet 108 is a plug case 101.
Is provided so as to project from the tip surface of the. The magnetic plate 109 is attached to the socket case 110 provided on the body side.
An adsorption plate 111 that is attracted by magnetic force is provided on the. In addition, the socket case 110 is provided with an electrode terminal 112 which is arranged to face the power supply terminal 102 so as to come into contact therewith.
And a grounding terminal 113 arranged so as to be capable of contacting the grounding terminal 104. Then, at the time of connection, the plug case 101 is inserted into the socket case 110, and the magnetic plate 109 adsorbs the adsorption plate 111 to thereby attach the plug case 101 to the socket case 1.
While being fixed to 10, the power supply terminal 102 was pressed by the electrode terminal 112 and the ground terminal 104 was pressed by the ground terminal 113.

However, with such a structure, the power supply terminal 102 and the ground terminal 104 are provided in the plug case 101.
However, there is a problem that the structure becomes complicated due to the movement of the magnets, and in particular, the shape of the permanent magnet 108 is difficult to process, and the cost becomes high. Further, if foreign matter adheres to the permanent magnet 108 and the magnetic plate 109 during connection, the grounding terminal 113 may malfunction and the grounding connection may become uncertain, which is a problem in reliability. Furthermore, the power supply with a ground connection basically has a line side and a neutral side, and there is a risk of being connected in reverse to the device.

The present invention solves the above-mentioned problems of the prior art, and can reliably perform grounding and power supply connection with a simple configuration, there is no risk of malfunction, and the connection operation is easy and excellent in operability. It is an object of the present invention to provide a power supply connecting device which is easy to assemble, inexpensive, and highly reliable.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a frame body mounted on the body side and having electrode pins arranged therein, and removably inserted in the frame body, and the above-mentioned A plug case in which a power supply terminal connectable to the electrode pin is arranged, a plug ground portion arranged in a tip end surface of the plug case, and a frame body provided so as to be retractable in the insertion direction of the plug case,
An earth spring having a ground pin that is pressed by the plug ground portion and biasing the ground pin toward the plug ground portion is inserted into a groove provided on the side surface of the frame body, and near the tip of the ground spring. The cut-and-raised claw provided is hooked and fixed to the tip of the groove located on the side opposite to the insertion side.

Operation According to the above configuration, the earth spring is supported by the frame body only by setting the ground spring so as to fit in the groove portion of the frame body without using a fixing member such as a screw, and the earth spring is , The grounding pin provided on the frame is biased toward the plug grounding part, which is inserted into the frame and connected to the power supply, and located on the tip surface of the plug case, so the movement of the grounding spring is smooth even when the plug case is removed. It will be.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. In the figure, an opening 3 into which a plug case 2 is fitted is formed on the front surface of a frame body 1 made of an insulating material. An attraction plate 4 made of a magnetic plate is arranged in the center of the frame body 1. The attraction plate 4 is attracted by the magnet 5 in the plug case 2, and the upper and lower ends of the attraction plate 4 are attracted. The part projects to the outside. Further, the ground pin 6 which is formed in a substantially columnar shape and has conductivity has its tip end brought into contact with the plug ground portion 7 on the plug case 2 side to obtain conduction. Further, as shown in FIGS. 3 and 4, the earth spring 8 having conductivity and elasticity is
On one side, tongue pieces 9 having cut-and-raised claws 9a are provided on the left and right, and a biasing piece 10 for biasing the ground pin 6 toward the opening 3 side of the frame body 1 is provided substantially at the center thereof. Further, in the opposite direction, a contact piece 11 bent in a substantially L shape is provided on the instrument body side. And the contact piece 1 of this earth spring 8
1 is mechanically and electrically connected to the main body 12 as shown in FIG.

The earth pin 6 urged by the earth spring 8 is inserted into an elongated hole 13 provided in the longitudinal direction at a substantially central portion of the suction plate 4 so that the earth pin 6 protrudes from the elongated hole 13 to form a frame body. 1 is located in the recess on the side of the opening 3. As shown in FIG. 5, the electrode pin 14 which is brought into contact with and connected to the contact of the terminal portion on the plug case 2 side is made of a conductive material, and the pair of contact rods are inside the opening 3 of the frame 1. The terminal fitting 15 is fixed by caulking or the like to the portion projecting to the back surface of the frame 1 to form the contact portion 16.

To set the earth spring 8 on the frame 1, as shown in FIGS. 3 and 4, move the earth spring 8 in the direction of the arrow,
The left and right tongues 9 of the earth spring 8 are inserted into the left and right groove portions 23 formed by the rib portion 21 and the protrusion portion 22 of the frame body 1. At this time, the cut-and-raised claw 9a is held in the groove 23 and becomes a substantially flat shape, but when the cut-and-raised claw 9a passes through the groove 23, the cut-and-raised claw 9a rises and hits the wall surface 22a of the projection 22, so that the cut-and-raised claw 9a moves in the direction of the arrow b. Will not come off, and as a result the earth spring 8 will be fixed. Then, the earth pin 6 set in advance is attached to the frame body 1 by the urging piece 10 provided substantially in the center.
It urges the receiving side of the.

Further, when the frame body 1 is set in the instrument body, as shown in FIG. 5, the contact piece 11 is pressed against the body portion 12. When the plug case 2 is set on the frame body 1, the plug ground portion 7 of the plug case 2 presses the biasing piece 10 of the ground spring 8 via the ground pin 6, so that the plug ground portion 7 of the plug case 2 and
It will be electrically connected to the instrument body. The plug ground portion 7 of the plug case 2 is connected to the ground terminal of the power supply portion via the cord 25. The yoke 26, which holds the magnet 5 from both sides, is connected to the attraction plate 4. A power supply terminal 27 connectable to the electrode pin 14 is arranged in the plug case 2.

FIG. 6 is a view of the frame body 1 as viewed from the insertion direction of the plug case 2, in which a corner-shaped upper portion of the frame body 1 is provided with a triangular flesh-shaped portion 1a, and Plug case 2
The notch is provided with a notch (not shown), and the notch regulates the position of the plug case 2 in the insertion direction into the opening 3 and regulates the line side and the neutral side of the power supply. There is.

As described above, according to the present invention, the frame body mounted on the body side and having the electrode pins arranged therein and the frame body can be detachably inserted into the frame body and can be internally connected to the electrode pins. A plug case in which a power supply terminal is arranged, a plug earth portion arranged on a tip end surface of the plug case, and a frame provided so as to be retractable in the insertion direction of the plug case in the frame body and pressed by the plug earth portion. A grounding pin for urging the grounding pin toward the plug grounding part, the grounding spring being inserted into a groove provided on the side surface of the frame, and the cut-and-raised claw provided near the tip of the grounding spring. Since it is fixed by hooking it on the tip of the groove located on the opposite side to the insertion side, simply set the ground spring so that it fits into the groove of the frame without using fixing members such as screws. Can be easily supported by the frame.

In addition, this ground spring biases the ground pin provided on the frame toward the plug ground part located on the tip surface of the plug case that is inserted into the frame and connected to the power supply. The movement of the spring is smooth, and as a result, the ground connection is always reliable, and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a frame body and a plug case which constitute a power supply connecting device according to an embodiment of the present invention, FIG. 2 is a transverse sectional view of the frame body and the plug case, and FIG. FIG. 4 is a front view of the earth spring and the frame body in FIG. 4, FIG. 4 is a side view of the earth spring and the frame body, FIG. 5 is a partial sectional view showing a state in which the frame body is set in an electric water heater, and FIG. 6 is the same frame. Front view of the body,
FIG. 7 is a sectional view of a conventional power supply connection device. 1 ... frame, 2 ... plug case, 6 ... ground pin,
7 ... Plug earth part, 8 ... earth spring, 9 ... tongue piece, 9a ... cut and raised claw, 14 ... electrode pin, 23 ...
Groove.

Claims (1)

[Scope of utility model registration request] 1. A plug case mounted on the body side and having electrode pins arranged therein, and a power supply terminal removably inserted in the frame and connectable to the electrode pins therein. A plug earth portion arranged on a front end surface of the plug case, and an earth pin provided in the frame body so as to be retractable in the insertion direction of the plug case and pressed by the plug earth portion, Insert the earth spring that biases the earth pin toward the plug earth part into the groove provided on the side surface of the frame, and locate the cut-and-raised claw provided near the tip of the earth spring on the opposite side to the insertion side. A power supply connection device that is fixed by hooking on the tip of the groove.