Coil body for miniature relays and the like
First Claim
1. A one-piece insulative coil body comprising:
- a coil tube having opposed end segments, at least two opposite sides extending between the end segments, and a central axis, the coil tube being adapted for bearing windings;
a pair of one-piece flanges, one of the flanges respectively formed integrally on each end segment of the coil tube;
at least one radial recess extending between the end segments, each formed radially into one of the opposite sides to a depth beyond the central axis;
a first recess formed axially adjacent one of the at least one radial recesses and radially into one of the opposite sides and one of the end segments to a depth beyond the central axis;
a second recess formed axially adjacent one of the at least one radial recesses and radially into one of the opposite sides and another of the end segments to a depth beyond the central axis;
each recess being formed into an alternatingly opposite side of the coil tube relative to each adjacent recess; and
an axially continuous core opening extending completely through the coil tube and shaped to receive a winding spindle, the core opening formed by the depth of each of the adjacent recesses.
2 Assignments
0 Petitions
Accused Products
Abstract
A coil body consists of a coil tube having flanges integrally formed onto the ends and having an axially through-extending opening. This core opening is formed by a successive arrangement of radial recesses which alternately extend through the coil tube wall from opposite sides. These radial recesses are formed by of reciprocally opposed projections of two cooperating mold halves of an injection molding tool. Such an arrangement permits manufacture of winding coil bodies with a simple two-part mold, eliminating a need for moveable components for forming the axial spindle core opening during the molding operation. The resulting coil body includes the continuous axial spindle opening defined by wall segments around its entire periphery and for easy attachment to a winding spindle for winding.
12 Citations
12 Claims
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1. A one-piece insulative coil body comprising:
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a coil tube having opposed end segments, at least two opposite sides extending between the end segments, and a central axis, the coil tube being adapted for bearing windings; a pair of one-piece flanges, one of the flanges respectively formed integrally on each end segment of the coil tube; at least one radial recess extending between the end segments, each formed radially into one of the opposite sides to a depth beyond the central axis; a first recess formed axially adjacent one of the at least one radial recesses and radially into one of the opposite sides and one of the end segments to a depth beyond the central axis; a second recess formed axially adjacent one of the at least one radial recesses and radially into one of the opposite sides and another of the end segments to a depth beyond the central axis; each recess being formed into an alternatingly opposite side of the coil tube relative to each adjacent recess; and an axially continuous core opening extending completely through the coil tube and shaped to receive a winding spindle, the core opening formed by the depth of each of the adjacent recesses. - View Dependent Claims (2, 3, 4, 5, 9, 11, 12)
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6. A one-piece coil body comprising:
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a coil tube having at least two opposed sides, a middle winding section, a pair of integral flanges at opposite ends of the winding section, and end tube sections extending axially outwardly from the respective flanges; at least one radial recess extending between the flanges, each formed radially into one of the opposed sides of the coil tube and the flanges to a depth beyond the central axis; a first recess formed axially adjacent one of the at least one radial recesses and radially into the coil tube and one of the end tube sections into one of the opposed sides to a depth beyond the central axis; a second recess formed axially adjacent one of the at least one radial recesses and radially into the coil tube and another of the end tube sections into one of the opposed sides to a depth beyond the central axis; each recess being formed into an alternatingly opposite one of the opposed sides relative to each adjacent recess; and an axially continuous core opening extending completely through the coil tube and shaped to receive a winding spindle, the core opening formed by the depth of each of the adjacent recesses. - View Dependent Claims (7, 8, 10)
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Specification