JPS6238346Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a noise filter with a socket that integrates a socket and a case for housing a filter element.

The present applicant has previously proposed a noise filter with a socket that combines a socket and a metal case that houses a filter element. However, in the case of a metal case, internal insulation becomes a problem, and it cannot be integrally molded with the socket. This causes problems such as an increase in the number of parts and troublesome assembly.

In view of the above points, the present invention forms an insulating resin case integrally with the socket, and has a coil and a coil inside the case.
By adopting a structure in which a filter element such as a capacitor is provided, the present invention aims to provide a noise filter with a socket that has a small number of parts, is easy to manufacture and assemble, and is highly reliable.

Embodiments of the noise filter with socket according to the present invention will be described below with reference to the drawings.

1 to 4, a box-shaped case body 2 is integrally molded at the rear of a power input socket 1 from insulating resin like the socket. The socket 1 has a recess 3 formed on the front surface thereof into which a plug fits, and a pair of power input contacts 4A, 4B and a ground contact 5 are fixed so as to protrude into the recess 3. Further, output terminals 6A, 6B and a grounding terminal 7 are provided on the back side of the box-shaped case body 2. The inside of the box-shaped case body 2 is divided into a coil storage recess 9 and a capacitor storage recess 10 by ribs 8 protruding inwardly, and a common mode York coil 11 is located in the center of the coil storage recess 9.
Prismatic projection 1 for fitting and fixing into the center hole of
2A and 12B are integrally formed. and,
A common mode choke coil 11 is provided in the coil storage recess 9 of the box-shaped case body 2, and an interline capacitor 13 and line-to-ground capacitors 14A and 14B are provided in the capacitor storage recess 10. The first common mode choke coil
The second winding 11A is connected between the contact 4A and the output terminal 6A, the second winding 11B is connected between the contact 4B and the output terminal 6B, and the second winding 11B is connected between the contact 4B and the output terminal 6B.
An interline capacitor 13 is connected between B and B. In addition, between the output terminals 6A, 6B and the ground terminal 7, line-to-ground capacitors 14A,
14B is connected. A lid 15 made of insulating resin is fitted into the upper opening of the box-shaped case body 2, and a metal flange 15 is integrally formed on the lid 15 to shield the back surface of the socket 1. A ground member 17 is provided, and the metal ground member 1
A grounding piece 18 drawn out from the grounding contactor 5 through the lid 15 is connected to the grounding terminal 7, and the rear end of the metal grounding member 17 is connected to the grounding terminal 7.

According to the above embodiment, the following effects can be achieved.

(1) Since the box-shaped case body 2 is integrally formed with the socket 1 using insulating resin, the structure is simple and the number of parts can be reduced.

(2) Since the box-shaped case body 2 is made of insulating resin, there is no need for special members for insulation between the case and the common mode choke coil 11 and capacitors 13, 14A, 14B, and resin casting etc. It can be omitted, making assembly easy and reducing costs.

(3) The inside of the box-shaped case body 2 made of insulating resin is divided into a coil storage recess 9 and a capacitor storage recess 10 by ribs 8, and a prismatic projection 1 for fixing the coil.
Since 2A and 12B are integrally formed, the coils and capacitors can be securely fixed or housed, and assembly can be facilitated and reliability can be improved.

(4) The metal grounding member 17 provided on the outer surface of the lid 15 connects the earthing contact 5 and the earthing terminal 7 on the back of the case. The ground piece 18 pulled out through the metal ground member 1
7, it is possible to reliably prevent the lid body 15 from coming off from the case body 2.

Note that instead of using the metal grounding member 17, the outer surface of the lid 15 may be plated with metal.

As explained above, according to the present invention, an insulating resin case is formed integrally with the socket, and the filter element is housed in the case, so that the structure is simple, easy to assemble, and highly reliable. A noise filter with a socket can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of a noise filter with a socket according to the present invention, Fig. 2 is a plan view with the lid omitted, Fig. 3 is a side sectional view, and Fig. 4 is a circuit diagram. be. 1...Socket, 2...Box-shaped case body, 4
A, 4B, 5... Contact, 6A, 6B, 7... Terminal, 8... Rib, 9... Coil storage recess, 10...
...Capacitor storage recess, 11...Common mode York coil, 12A, 12B...Prismatic projection,
13, 14A, 14B... Capacitor, 15...
Lid body, 17... Metal grounding member, 18... Earthing piece.

Claims (1)

[Scope of utility model registration request] A power input socket 1 has a recess 3 formed on the front surface, and a pair of power input contacts 4A, 4B and a ground contact 5 are fixed so as to protrude into the recess 3. An insulating resin is attached to the rear of the power input socket 1. A box-shaped case body 2 is integrally formed, and output terminals 6A, 6B and a grounding terminal 7 are provided on the back surface of the box-shaped case body, and a coil storage recess is formed by ribs 8 that protrude inwardly within the box-shaped case body. 9 and a capacitor accommodating recess 10, and a columnar protrusion formed in the coil accommodating recess 9 fits and fixes a chiyoke coil, and a power input contact 4 is inserted through the winding of the chiyoke coil.
A, 4B and output terminals 6A, 6B are respectively connected, a capacitor is arranged in the capacitor storage recess 10, a grounding piece 18 is connected to the grounding contact 5, and an insulating resin is connected to the box-shaped case body 2. and connect the grounding piece 18 drawn out through the lid 15 to the metal grounding member 17 provided on the outer surface of the lid 15. A noise filter with a socket, characterized in that a noise filter is connected to the grounding terminal 7.