Molded coil and solenoid controlled valve using the same

Abstract

The invention provides a molded coil which can reliably realize the electric connection between an electric terminal and an electric terminal socket of a socket assembly and the electric connection between a grounding terminal and a grounding terminal of the socket assembly so as to make a solenoid valve work reliably and a solenoid controlled valve using the same. The molded coil is used for driving a valve body of the solenoid valve, is formed by resin mould pressing and comprises a spool winded by coils, a pair of power supply electric terminals in electric connection with a terminal of the coils, a magnetic framework encircling the spool and a grounding terminal in connection with the magnetic framework, the grounding terminal being fixedly connected to inner walls of the magnetic framework.

Description

technical field [0001] The present invention relates to a molded coil for driving a valve body of a solenoid valve and molded from resin, and a solenoid valve using the molded coil. Background technique [0002] Conventionally, in order to make a coil used in a solenoid valve waterproof, a molded coil is used in which the entire coil is covered with resin, and a valve body is attached to a valve body mounting hole of the molded coil to form a solenoid valve. [0003] In addition, in this case, a so-called standardized socket assembly called a "DIN socket (or DIN connector)" is connected to a solenoid valve used for waterproofing. [0004] That is, by connecting the socket assembly to the molded coil, a pair of power supply terminals mounted on the bobbin and electrically connected to the end of the winding wire and the power supply terminal of the socket assembly, and a pair of power supply terminals connected to the magnetic frame surrounding the bobbin are respectively con...

AI Technical Summary

Problems solved by technology

[0010] However, in such conventional molded coils, when the molten resin is injected, the bobbin assembly consisting of the bobbin and the magnetic frame surrounding the bobbin is misaligned in the metal mold, so that the thickness of the covering part is locally thinned, and the magnetic The frame is exposed on the surface of the cover, or the relative position and protruding distance of the ground terminal and the power supply terminal are misaligned

[0011] As a result, the socket assembly cannot be fixed on the molded coil, the electrical connection between the power supply terminal and the power supply terminal socket of the socket assembly, and the electrical connection between the ground terminal and the ground terminal socket of the socket assembly cannot be realized. Possibility of poor solenoid valve operation

[0012] In addition, in the molded coil 100 of Patent Document 1, the ground terminal 102 is sandwiched between the solenoid valve 110 and the molded coil 106 to electrically connect the solenoid valve 110 and the ground terminal 102. Therefore, if the solenoid valve 110 and molding The attachment and detachment of the coil 106 causes friction between the ground terminal 102 and the solenoid valve 110 each time the attachment and detachment are performed, so the contact surface is worn and the electrical contact is poor. As a result, there is a possibility that the solenoid valve 110 may malfunction.

[0013] In addition, in the molded coil 200 of Patent Document 2, since the power supply terminal 204 and the ground terminal 206 are provided on the outer wall of the magnetic frame 210, the printed circuit board 202 is required, and the molded coil 200 is enlarged. to an extent equivalent to the part required for a printed circuit board 202

[0014] In addition, when the socket assembly is fixed or detached, when the socket assembly is fixed or detached on the internal thread 214 at the front end of the gasket 212, a force in the direction of rotation is applied to the internal thread 214, so that the gasket 212 may rotate together. possibility

[0015] Therefore, when the spacer 212 rotates, a gap is generated between the ground terminal 206 and the magnetic frame 210, and the ground terminal 206 cannot be firmly connected.

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