JPH0222962Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coil bobbin with an improved structure of flanges between terminals.

Conventionally, the terminal and coil end of a coil bobbin were processed by planting the terminal on one side flange and wrapping the end of the coil around the neck of the terminal, as shown in Fig. 1 of Japanese Utility Model Application Publication No. 55-25347 proposed by the present applicant. turned and soldered,
The insulation between the coil terminals is L formed on the flange.
The method of leading out the coil terminals using lead wires, which has been used for a long time, has been improved by insulating the coils by passing them through a letter-shaped groove or pasting insulating tape to isolate them. The distance between the terminals is difficult to maintain, and processing is troublesome, so as shown in Figures 2 to 9 in the same publication, a groove is provided between the terminals of the flange, the coil end is led out, and the terminal is soldered to the terminal. We proposed inserting a protrusion provided on the insulation protection cover to ensure insulation between the coil terminals.

However, when inserting the protrusion into the groove, if the coil terminal in the groove is loose and sagging, there is a risk that it will get caught in the protrusion and be cut. However, the coil bobbin and the cover that covers the core and motor drive side are installed in different directions, so they are separate parts.
The disadvantage is that the number of parts increases, resulting in poor workability and high costs.

In view of the above drawbacks, the purpose of the present invention is to provide a first groove and a second groove between the terminals of the flange, fit a protrusion provided on the cover into the first groove, and insert the coil end into the second groove. To propose a coil bobbin that provides insulation between coil terminals even if the coil terminals become loose and sag, and prevents cutting by protrusions during assembly.

A feature of the present invention is that a plurality of terminals are provided on the flange of the coil bobbin, and the flange portion between the terminals has a first groove into which an insulating projection provided on the inside of the case cover that covers the coil bobbin is inserted. ,
a second groove through which the end of the coil winding is inserted;
The end of the coil winding is connected to a terminal protruding from the outer surface of the flange.

Hereinafter, the coil bobbin of the present invention will be explained with reference to an embodiment shown in the drawings. 1 to 3 illustrate the coil bobbin of a synchronous motor. In FIG. 1, a core 3 is held between a case 1 and a cover 2, and one side of the core 3 is placed outside as shown in FIGS. 1 to 3. The coil bobbin 4 is inserted into the coil bobbin 4, and the flanges 4a, 4 on both sides of the coil bobbin 4
Coil connecting portions 5a and 6a of a first terminal 5 and a second terminal 6 fixed to the outside of b and one side flange 4a are covered by a case 1 and a cover 2.

The case 1 and cover 2 are fixed with screws 7 as shown in FIG. 2, and are engaged with each other by a hook formed on the front side in the figure.

As shown in FIG. 1, a shaft 9 of a rotor 8, a shaft 11 of another gear 10, etc. are supported between the case 1 and the cover 2 on the other side of the core 3.

The coil bobbin 4 has flanges 4a and 4b on both sides.
A hollow body portion 4c around which the coil 12 is wound, a rib 4d protruding perpendicularly to the flange 4a on one side are integrally molded from a synthetic resin material, and a flange between the first terminal 5 and the second terminal 6 is integrally formed. A first groove 4e and a second groove 4f are formed in the flange 4 on the first terminal 5 side.
As shown in Figs. 1 to 3, there is a protrusion 4g on the outside of a.
A groove 4h is formed, and the groove 4h reaches the outside of the hollow body portion 4c and opens inside the flange 4a, as shown in FIG.

On the inside of the cover 2, as shown in FIG. 1 and FIGS. 4 to 6, at a position opposite to the first groove 4e,
An insulating protrusion 2a is formed to protrude to provide insulation between the coil terminals.

The first terminal 5 and the second terminal 6 have the same shape and are formed of one end 5b and the coil connecting portion 5a bent at right angles to the plurality of legs 5c at the other end, as shown in FIG. Furthermore, as shown in FIGS. 1 and 3, the first terminal 5 has one end 5b protruding from above the flange 4a in a direction perpendicular to the direction in which the core is inserted.
The coil connecting portion 5a is insert-molded so as to protrude from the surface of the flange 4a opposite to the side surface of the hollow body portion 4c, that is, from the outer surface of the flange 4a, in a direction parallel to the insertion direction of the core. Further, one end 5b projects outward from the through hole 2b of the cover 2. Note that although only the first terminal 5 has been described above, the same applies to the second terminal 6, so the explanation will be omitted.

The protrusion 2a of the cover 2 and the first groove 4e and second groove 4f of the coil bobbin 4 are configured as described above, and the end of the coil at the beginning of winding of the coil 12 wound around the hollow body 4c is led out from the groove 4h. The protrusion 4g
After wrapping around the coil connection part 5 of the first terminal 5
a, and the coil end of the coil 12 at the end of winding is led out from the second groove 4f and connected to the coil connection part 6a of the second terminal 6. When the outside of the coil bobbin 4 is covered with the cover 2, the protrusion 2a is the first groove 4
Since the protrusion 2a is inserted into the coil terminal e, the protrusion 2a is directly led out from the second groove and does not come into contact with the coil terminal connected to the coil connecting portion 6a of the second terminal 6, so that the coil terminal is not cut. Furthermore, even if the coil terminal becomes loose and sagging, it is within the second groove 4f and a sufficient insulation distance from the other coil terminal and the first terminal 5 is maintained because the first groove 4e and the protrusion 2a are located in the middle. .

Since the present invention is configured as described above, the coil terminal led out from the second groove and connected to the coil connecting portion of the second terminal does not come into direct contact with the protrusion of the cover, and therefore is not cut. 2 terminals and 2nd terminal
It is possible to provide a coil bobbin which has excellent practical effects, such as being separated from the coil end of the terminal by sandwiching a protrusion so as to provide a sufficient insulation distance.

[Brief explanation of drawings]

Figure 1 is a front view of the coil bobbin showing the case, cover, and rotor in cross section, Figure 2 is a plan view of the coil bobbin with part of the cover cut away, and Figure 3 is a cross section of the case and cover. Figure 4 is a side view of the coil bobbin, Figure 4 is a plan view of the main part inside the cover, Figure 5 is a side view of the coil bobbin,
1, FIG. 6 is a side view of the main part in section taken along the line - in FIG. 1, and FIG. 7 is an external perspective view of the terminal. 2...Cover, 2a...Protrusion, 3...Core, 4
...Coil bobbin, 4a, 4b...Flange, 4
e...first groove, 4f...second groove, 5...first terminal, 5a, 6a...coil connection portion, 6...second terminal, 12...coil.

Claims (1)

[Scope of utility model registration request] In a coil bobbin comprising a hollow body into which a core is inserted and a coil winding is wound, and a flange formed at an end of the hollow body, and a plurality of terminals are provided on the flange, one end of the terminal is provided. The terminal protrudes from the flange in a direction perpendicular to the insertion direction of the core to be inserted into the center of the coil bobbin, and the other end of the terminal extends in a direction parallel to the insertion direction of the core and outside the flange. a first groove that protrudes from the flange on a side surface and into which an insulating protrusion provided on the inside of a cover that covers the coil bobbin is fitted into a flange portion between the terminals; and the coil winding and the terminal. A coil bobbin characterized in that a second groove is provided in which the end of the coil winding is inserted from the hollow body side to the outer surface side in order to connect the other end.