JPH0414888Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a coil bobbin used, for example, in a motor of a crystal watch.

(Prior Art) This type of coil bobbin is manufactured by plastic molding, and generally has a flange on both sides of the coil winding part, and the flange has an iron core insertion opening. Are known. Recently, a coil bobbin that does not require a slide core has been proposed in Japanese Utility Model Publication No. 57-16329. According to this invention, it is possible to manufacture with male and female molds, and as a result, it is possible to reduce manufacturing costs and to obtain the benefits of improved workability.

(Problem to be solved by the invention) However, when manufacturing with male and female molds, if an opening is provided on one side of the coil winding part, all areas that do not overlap with the opening on the opposite side of that side are covered with the opening. This has the following disadvantages.

That is, as shown in FIG. 7, when the iron core 14 is inserted obliquely, the iron core 14 may come into contact with the winding 12, causing a coil breakage. In order to prevent this, the iron core insertion port 13 has to be made narrower, which makes it difficult to create a mold.
As a result, manufacturing costs increase and the profit of manufacturing with male and female molds is lost.

(Means for Solving the Problems) The present invention has been made in order to eliminate the above-mentioned drawbacks, and for this purpose, the following technical means are adopted.

That is, the coil bobbin of the present invention, as described with reference numerals used in the examples, has at least one opening 6 on one surface of the coil winding portion 1, and does not overlap with the opening 6 on the opposite surface of the coil winding portion 1. The bobbin has an opening 6 in all areas, flanges 2, 2 are provided on both sides of the coil winding part 1, and the flanges 2 are provided with an iron core insertion opening 5, and the flanges 2 are , a rib 7 is provided on the side opposite to the coil winding part 1, and a part of the rib 7 on the side where the iron core is inserted and the side where the opening 6 is located further protrudes to the side opposite to the coil winding part 1. At the same time, a recess 9 opening toward the coil winding part 1 is formed in the protrusion 8, and a protrusion 10 is formed outside the collar 2 and at a position overlapping the recess 9 on a plane. .

(Function) According to the above configuration, since the protrusion 8 having the recess 9 and the convex portion 10 are provided at opposing positions in the vertical direction, it can be easily manufactured using only the upper and lower male and female molds. By forming the protruding part 8 and the convex part 10, the iron core insertion opening 5 has a thickness in the insertion direction, and the insertion posture of the iron core has a small inclination, so that contact with the winding is prevented. Prevented.

(Example) Hereinafter, the present invention will be further described in detail based on the drawings showing one example.

In the figure, 1 is a coil winding part, 2 is a flange part, 3 is a winding wire, 4 is an iron core, and 5 is an iron core insertion slot. Openings 6 that open alternately with respect to the center of
is provided in the longitudinal direction of the bobbin. Reference numeral 7 denotes a rib, which is provided over approximately half of the surface of the flange 2 in order to reinforce the flange 2. That is, in the coil bobbin of the present invention, at least one opening 6 is provided on one surface of the coil winding section 1, and all areas that do not overlap with the opening on the opposite surface of the surface are defined as openings, and the coil winding section 1 is provided with at least one opening 6. The bobbin is provided with flanges 2 on both sides and an iron core insertion opening 5 in the flanges, and the flanges 2 are provided with ribs 7 on the side opposite to the coil winding part 1.

Furthermore, in the present invention, a part of the rib 7 on the side where the iron core 4 is inserted and the side where the opening 6 is located is connected to the coil winding part 1.
A concave portion 9 is formed in the protruding portion 8 and opens toward the coil winding portion, and a convex portion 10 is formed on the outside of the flange portion 2 and at a position overlapping the concave portion 9 on a plane. is formed. In this way, by forming the protrusion 8 with the recess 9 and the convex part 10, the iron core insertion opening 5 has a thickness in the insertion direction, so that the iron core can be inserted in a position with a small inclination. This prevents contact with the windings.

In the figure, reference numeral 11 denotes a bulge, which has a function of preventing the tip of the iron core 4 from coming into contact with the winding 3.

(Effects of the invention) As explained above, the present invention provides at least one opening on one surface of the coil winding part, and defines all the areas that do not overlap with the opening on the opposite surface of the surface as openings, and Flange parts are provided on both sides of the coil winding part,
The bobbin has an iron core insertion opening in the flange, and the flange has a rib on the side opposite to the coil winding part, and has a rib on the side where the iron core is inserted and where the opening is. A part of the rib is further formed to protrude on the side opposite to the coil winding part, and a recess that opens toward the coil winding part is formed in this protrusion, and overlaps with the recess in a plane on the outside of the flange part. Since the coil bobbin is constructed by forming a convex portion at the position, it has the advantage that it can be manufactured easily and inexpensively using only male and female molds,
The presence of the protruding portion with the recessed portion and the convex portion has the advantage that damage to the winding wire can be avoided when the iron core is inserted.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
3 is a right side view of the same, FIG. 4 is a plan view of the same, FIG. 5 is an enlarged sectional view taken along line A-A in FIG. FIG. 2 is a sectional view of a main part of a coil bobbin for explaining a technical problem. DESCRIPTION OF SYMBOLS 1... Coil winding part, 2... Flam part, 5... Iron core insertion port, 6... Opening, 7... Rib, 8... Projection, 9... Recess, 10... Convex part.

Claims (1)

[Scope of utility model registration request] At least one opening is provided on one surface of the coil winding part, all areas that do not overlap with the opening on the opposite surface of the surface are defined as openings, and flanges are provided on both sides of the coil winding part, and the flanges are provided on both sides of the coil winding part. The bobbin is provided with an iron core insertion opening, and the collar part is provided with a rib on the side opposite to the coil winding part, and one of the ribs is provided on the side where the iron core is inserted and where the opening is. A concave portion is further formed to protrude on the side opposite to the coil winding portion, and a concave portion opening toward the coil winding portion is formed in this protrusion portion, and a convex portion is formed on the outside of the flange portion and at a position overlapping the concave portion on a plane. A coil bobbin characterized by forming a section.