DE3335814A1 - CHAMBER REEL - Google Patents

Description

33358H

CHAMBER COIL BODY

DESCRIPTION

The invention relates to a Kammerspulenkörρer for Use in printed circuit boards, preferably for a switched-mode power supply transformer of a television set, with in a double U core can be inserted into the bobbin and the transformer has a metallic shielding jacket.

There are different versions of bobbins for small transformers known, which on opposite Side flange parts with solder pins for inserting the transformer into printed circuit boards exhibit. Flyback converter transformers for television sets are also known in which the coil formers through dividers in different winding rooms

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is divided. The coaxial is also used for line-side isolation in small transformers Putting together chamber bobbins Application, as such a simple and advantageous separation between the secondary and primary-side winding area is possible. However, it is disadvantageous in the known designs of small transformers of the type described that to ensure the required insulation values and safety distances between the primary and Secondary winding does not dispense with pouring the transformer with a corresponding potting compound can be.

The object of the invention is therefore to provide a bobbin structure for a switched-mode power supply transformer of a television set, which after winding the Bobbin and completion the required electrical insulation values and safety clearances between primary and secondary winding and other parts (transformer core, circuit board), without additional Isolation measures (e.g. pouring out the transformer) guaranteed. The bobbin should also be constructed in this way be that automatic winding and plugging is possible, and that still a metallic shielding jacket can be placed over the windings.

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This object is achieved according to the invention by the im characterizing part of claim 1 specified features solved.

Advantageous embodiments of the invention The bobbin emerges from the subclaims.

The invention is explained in more detail below with reference to the drawing figures, for example.

Show it:

Fig. 1 is a perspective view

of the bobbin according to the invention in an expanded state, and

Fig. 2 is a perspective view of an assembled coil

body, however, as a complete switched-mode power supply transformer of a television set.

FIG. 1 shows, in a perspective illustration in the exploded state, a bobbin that consists of several coil body parts that can be coaxially plugged into one another. The complete chamber bobbin 1 is based on the drawing shown

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composed of three differently designed body parts. In a center piece 2, a coil body part 3 and 4 can be fitted into one another coaxially on both sides that a self-contained bobbin block is created. The coil body parts 3, 4 have inner and outer side flanges. In the outer side flanges 5, 6 are perpendicular to the bobbin solder pins 7, 8 used = by means of these solder pins is z. B. a completely wound and assembled To use the power supply transformer of a television set in a printed circuit board and with this soldering contacting. The soldering pins 7, 8 and the plastic part of the side flange carrying them the bobbin parts 3, 4 are also designed so that the individual connecting wires of the later Applied windings can also be soldered to the solder pins before they are plugged into one another the bobbin parts 3, 4 in the middle piece 2, d. H. already on the wrapping machine. the The windings of the center piece are only carried out after the bobbin has been joined and the Wire ends are wrapped or soldered to solder pins of the coil body parts 3, 4. The inner spool flanges 9, 10 of the spool parts are matched so that they are coaxial with one another and in the middle piece 2 fit. The coil body parts 3, 4 and the center piece 2 have winding chambers of different sizes

which are formed by appropriate dividers. One or both bobbin parts 3, 4 and that Middle part 2 have a locking device in In the form of resilient locking hooks 11, which make it possible that the individual parts of the bobbin become one Bobbin block are assemblable. There is a double U core in the core openings of the bobbin block can be used, which is preferably designed as a ferrite sintered part. One side thigh each of the U-core is partially enclosed on both sides by a wall 12 on the side flange 5. The bobbin openings have a rectangular cross-section to accommodate the coil core. The structure of the The bobbin, however, is independent of the geometry of the bobbin; so can cores with different Cross-sections, e.g. B. square or round can be selected and used. An adaptation of the Bobbin opening is required here. The individual bobbin parts and the middle piece can, if necessary, by any partitions 13, 13 ", 13 * 'in different sized winding chambers be subdivided. The two side flanges 14, 15 of the bobbin center part 2 are designed so that that they include the outer leg of the U-core.

Furthermore, the insides of the side flanges 14, 15 has a circumferential shoulder 16 into which a metallic shielding jacket that can be wound over the bobbin is insertable. The inner dividers 13

support the shielding jacket from the inside .

Figure 2 shows the wound bobbin, which with the other parts, for. B. a double U-core 17 and a metallic shielding jacket 18 is assembled to form a complete switched-mode power supply transformer of a television set.

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Claims (8)

33358H CHAMBER COIL BODY PATENT CLAIMS (\ J Chamber bobbin for insertion in printed circuit boards, preferably for a switched-mode power supply transformer of a television set, a double U-core can be inserted into the bobbin and the transformer has a shielding jacket, characterized in that the bobbin (1) consists of a central part (2) consists, in which a coil body part (3, 4) can be inserted coaxially into one another on both sides in such a way that the side flanges (5, 6) and separating webs on the coil body parts (3, 4) form an outwardly closed chamber with subdivided individual chambers, whereby the outer side flanges of the bobbin parts have rows of solder pins (7, 8) perpendicular to the bobbin. 2. bobbin according to claim 1, characterized in that the bobbin parts (3, 4) have winding chambers of different sizes, and that the soldering pins can be used as required and independently of the number of winding chambers. 3. bobbin according to claims 1 and 2, characterized in that the individual coil body parts (2, 3, 4) with one another via a locking device in the form of resilient Latching hooks (11) can be locked to form a bobbin block. 4. bobbin according to one of the preceding claims, characterized in that that in the core openings of the bobbin a double U-core (17) can be used that a Side legs of the U-core on both sides of the side flange (5, 6) of the bobbin parts (3, 4) partially is included. 5. Bobbin according to one of the previous ones Claims, characterized in that that the bobbin opening receiving the U-leg of the U-core is rectangular Has cross section. 3- 33358H 6. bobbin according to one of the previous claims, characterized in that that the side flanges (14, 15) of the bobbin middle part (2) both legs of the U-core include. 7. bobbin according to one of the previous claims, characterized in that that the side flanges (14, 15) of the bobbin middle part (2) on the inside have a circumferential shoulder (16) into which a metallic Shielding jacket (18) can be inserted. 8. bobbin according to one of the previous claims, characterized in that that the separating webs (13) of the bobbin middle part (2) the outer leg of the double U-core include only partially. - 4 - Description: