Chip filter and the related supplementary tool

• US 20110095847A1
• Filed: 12/23/2010
• Published: 04/28/2011
• Est. Priority Date: 08/26/2009
• Status: Active Grant

• Current Assignee: U.D. Electronic Corp.
• Original Assignee: U.D. Electronic Corp.
• Inventors: Chen, Po-Jung
• Granted Patent: US 8,203,853 B2
• Time in Patent Office: Days
• US Class Current: 333/175
• CPC Class Codes: H01F 17/062 Toroidal core with turns of coil around it
• CPC Class Codes: H01F 2005/043 having multiple pin terminals, e.g. arranged in two parallel lines at both sides of the coil
• CPC Class Codes: H01F 27/027 specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H01F 41/10 Connecting leads to windings making electric connections in general H01R43/00
• CPC Class Codes: H01R 13/6633 with inductive component, e.g. transformer
• CPC Class Codes: H01R 13/719 specially adapted for high frequency, e.g. with filters
• CPC Class Codes: H03H 2001/0092 Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter
• CPC Class Codes: H05K 2201/1003 Non-printed inductor
• CPC Class Codes: H05K 2201/1006 Non-printed filter
• CPC Class Codes: H05K 2201/10287 Metal wires as connectors or conductors
• CPC Class Codes: H05K 3/3426 characterised by the leads
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A chip filter and supplementary tool combination is disclosed. The chip filter includes a insulative holder base having two arrays of wire grooves arranged along two opposing sidewalls thereof and soldering zones defined in a finished surface on each sidewall corresponding to the wire grooves, connection terminals each having a base portion respectively embedded in the soldering zones in the sidewalls of the insulative holder base and a soldering surface respectively kept in flush with the top edge of the associating sidewall, and filter elements having lead wires thereof respectively extending out of the insulative holder base through the wire grooves and respectively rested on the soldering surfaces of the connection terminals and held down in position by the supplementary tool for soldering by an automatic soldering machine.

Claims

1. A chip filter, comprising:

an insulative holder base, said insulative holder base comprising two opposing sidewalls, a recessed chamber defined between said two sidewalls, two arrays of protruding blocks respectively arranged along said sidewalls adjacent to said recessed chamber and protruding over a flat top edge of each of said sidewalls, a wire groove defined between each two adjacent protruding blocks of each said array of protruding blocks, a finished surface formed on the flat top edge of each of said sidewalls, and a plurality of soldering zones defined in said finished surface corresponding to said wire grooves;

a plurality of connection terminals, each said connection terminal comprising a base portion positioned in one soldering zone in said finished surface of one said sidewall of said insulative holder base, a soldering surface located on said base portion and kept in flush with the top edge of the associating sidewall, and a bonding tip extended from said base portion out of the associating sidewall for bonding to one respective surface contact of an external circuit board; and

a plurality of filter elements mounted in said recessed chamber of said insulative holder base, each said filter element comprising a metal core and a plurality of windings wound round said metal core, said windings each comprising a plurality of lead wires respectively extending out of said recessed chamber of said insulative holder base through the wire grooves of said insulative holder base and respectively soldered to the soldering surfaces of said connection terminals.

2. The chip filter as claimed in claim 1, wherein the base portion of each said connection terminal has a width greater than the width of the wire grooves of said insulative holder base;

the bonding tip of each said connection terminal extends outwardly from an outer end of the associating base portion outside the associating sidewall of said insulative holder base.

3. The chip filter as claimed in claim 1, wherein each said connection terminal has an opening defined in a front side relative to the base portion at one side of the bonding tip thereof and aimed at one said wire groove.

4. The chip filter as claimed in claim 1, wherein the base portions of said connection terminals are positioned in said sidewalls of said insulative holder base during molding of said insulation holder base;

each said connection terminal comprises an interference block extended upwardly from one end of the associating base portion opposite to the associating bonding tip and embedded in one said sidewall of said insulative holder base.

5. The chip filter as claimed in claim 1, wherein the bonding tip of each said connection terminal has a vertical segment connected to the associating base portion and embedded in the associating sidewall of said insulative holder base, a transverse segment extended from one end of said vertical segment remote from the associating base portion to the outside of the associating sidewall, a supporting segment vertically downwardly extended from one end of said transverse segment remote from said vertical segment and suspending outside said insulative holder base, and a bonding segment perpendicularly outwardly extended from a bottom end of said supporting segment for bonding to one surface contact of an external circuit board.

6. A chip filter and supplementary tool, comprising:

a chip filter, said chip filter comprising;

(a) an insulative holder base, said insulative holder base comprising two opposing sidewalls, a recessed chamber defined between said two sidewalls, two arrays of protruding blocks respectively arranged along said sidewalls adjacent to said recessed chamber and protruding over a flat top edge of each of said sidewalls, a wire groove defined between each two adjacent protruding blocks of each said array of protruding blocks, a finished surface formed on the flat top edge of each of said sidewalls, and a plurality of soldering zones defined in said finished surface corresponding to said wire grooves;

(b) a plurality of connection terminals, each said connection terminal comprising a base portion positioned in one soldering zone in said finished surface of one said sidewall of said insulative holder base, a soldering surface located on said base portion and kept in flush with the top edge of the associating sidewall, and a bonding tip extended from said base portion out of the associating sidewall for bonding to one respective surface contact of an external circuit board; and

(c) a plurality of filter elements mounted in said recessed chamber of said insulative holder base, each said filter element comprising a metal core and a plurality of windings wound round said metal core, said windings each comprising a plurality of lead wires respectively extending out of said recessed chamber of said insulative holder base through the wire grooves of said insulative holder base and respectively soldered to the soldering surfaces of said connection terminals; and

(d)

a supplementary tool, said supplementary tool comprising;

(a) tool base, said tool base comprising a top recess for accommodating said insulative holder base, two pairs of stop blocks bilaterally disposed at two opposite lateral sides relative to said top recess, a holding space defined between each said pair of stop blocks at each of two opposite lateral sides of said top recess, a plurality of partition blocks and partition slots alternatively arranged in parallel in each said holding space between the associating two stop blocks, a series of protruding blocks arranged along each of the two opposite lateral sides of said top recess between the two stop blocks at each of the two opposite lateral sides of said top recess, and a plurality of locating grooves respectively defined between each two adjacent protruding blocks at each of the two opposite lateral sides of said top recess; and

(b) two retaining blocks respectively set in the two holding spaces at the two opposite lateral sides of said top recess between the respective stop blocks, each said retaining block having an elongated base and a plurality of teeth perpendicularly extended from one side said elongated base in a parallel relationship and respectively inserted into the partition slots in each of the holding spaces such that a narrow crevice is defined between one side of one said tooth and one respective partition block in axial alignment with one said locating groove at each of the two opposite lateral sides of said top recess for securing one said lead wire of said chip filter for bonding.

7. The chip filter and supplementary tool as claimed in claim 6, wherein said supplementary tool further comprises a cushion pad attached to said top recess of said tool base to adjust the depth of said top recess and to support said insulative holder base of said chip filter in said top recess.

8. The chip filter and supplementary tool as claimed in claim 6, wherein said supplementary tool further comprises two supporting bars selectively and detachably attached to said tool base at the two opposite lateral sides of said top recess for supporting the base portions of the connection terminals of said chip filter for bonding.

9. The chip filter and supplementary tool as claimed in claim 6, wherein said supplementary tool further comprises a cover member adapted to cap said chip filter on said tool base for soldering, said cover member having two shoulders symmetrically disposed at two opposite lateral sides thereof for setting in said top recess to hold down said filter elements of said chip filter and a plurality of end hooks symmetrically downwardly extended from two distal ends thereof and respectively detachably hooked in respective retaining grooves in said tool base.

10. The chip filter and supplementary tool combination as claimed in claim 6, wherein the base portion of each said connection terminal of said chip filter has a width greater than the width of the wire grooves of said insulative holder base;

the bonding tip of each said connection terminal of said chip filter extends outwardly from an outer end of the associating base portion outside the associating sidewall of said insulative holder base;

each said connection terminal of said chip filter has an opening defined in a front side relative to the base portion at one side of the bonding tip thereof and aimed at one said wire groove.

11. The chip filter as claimed in claim 6, wherein the base portions of said connection terminals of said chip filter are positioned in said sidewalls of said insulative holder base during molding of said insulation holder base;

each said connection terminal comprises an interference block extended upwardly from one end of the associating base portion opposite to the associating bonding tip and embedded in one said sidewall of said insulative holder base.