JPH0449172A - Coil bobbin - Google Patents

Abstract

PURPOSE:To make a cost reduction possible because of elimination of terminal parts, unnecessity for terminal press-fit process, etc. by integrally forming a terminal pin with a coil bobbin, and applying a plating process of copper or the like partially to the terminal parts. CONSTITUTION:The figure is a drawing for showing an internal structure of a servo motor used as a driving source of a light quantity adjusting device of a video camera, and the numeral 1 is a coil bobbin, on which coils 6, 7 are wound, wound onto a bobbin terminal part 1a in which a winding start and end of the coils 6, 7 are integrally molded. The terminal part 1a, in which copper or tin plating is partly applied only to an H part, is soldered after coil winding. Thus by integrally molding also the terminal part similarly to the coil bobbin, deformation of the terminal part and also its shape can be arbitrarily set. When copper plating or the like is applied to also a binding part of a winding, binding and soldering can be conducted simultaneously with the publicly known terminal pin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coil bobbin that is incorporated into a servometer device or the like used in an imaging optical system of a video camera.

[Prior Art] FIGS. 6 to 8 show the terminal pin structure of a conventional coil bobbin.

No. 6I2I is a sectional view of FIG. 7, and as is clear from the figure, the terminal pin is formed of a separate member from the coil pin 10, is press-fitted into the bohin 10, and is attached to the barbed portion 12a at the end of the winding 13. As is well known and obvious, the terminal pin material slightly protruding from the coil bobbin IO is made of mild steel, tin-plated copper wire, or the like. In Figure 8, the end of the winding 13 is tied to the terminal pin 12', and after soldering, a part of the terminal pin is returned in the direction of the arrow for one turn &! This is the terminal pin structure of the coil bobbin that takes up the slack of No. 13.

[Problem to be solved by the invention] However, in the above conventional example, when the terminal pin 12, 12' is press-fitted into the coil bobbin 10, the 1st winding 13 portion is deformed, or when there is no space etc., the terminal pin 12 .12
’ diameter must be made extremely small, and the coil bobbin 1
Because the diameter of the part to be press-fitted was small, there were some drawbacks such as molding problems, especially mold pins breaking.

Further, as mentioned above, if the terminal pins 12, 12' are deformed, or if the mating parts are forcibly inserted when they do not fit into the holes of the printed circuit board, flexible board, etc., troubles such as wire breakage may occur.

[Means for Solving the Problems] According to the present invention, by integrally molding the terminal portion as well as the coil bobbin, it becomes possible to deform the terminal portion and arbitrarily set the shape of the terminal portion. Furthermore, if the collar portion of the winding is also plated with copper, it becomes possible to attach the wire and solder the wire at the same time as the known terminal pin.

[Example] Figures 1 to 3 show examples of the present invention. Figure 1 is a drawing showing the internal structure of a servometer used as a drive source for a light amount adjustment device of a video camera, and 1 is a diagram showing a coil. 6
．． There is a coil bobbin winding 7, and the coil is 6.7.
The bobbin terminal part 1a is integrally formed with the beginning and end of winding.
Wrap it around. As shown in FIG. 3, only the H portion of the terminal portion 1a is partially plated with copper or tin, and the coil winding will be soldered later.

3 is a permanent magnet, 4 is a yaw to constitute a magnetic circuit, and 5 is an output shaft.

[Other Embodiments] The same effect can be obtained by applying conductive paint, adhesive, creamy solder, etc. to the terminal portion 1a.

Figures 4 and 5 show another embodiment, in which the coil bobbin 8 is provided with an integrally molded bobbin terminal portion 8a, which is partially plated to enable soldering of the coil terminal. It has been treated with conductive paint, adhesive, etc. In this other embodiment, the protruding direction of the bobbin terminal portion 8a is perpendicular to the output shaft 9. The setting of this protrusion direction is a limitation or a big problem with the conventional press-fitting method of terminal pins.
By integrally molding the bobbin terminal portion 8a with the coil bobbin 8, it can be easily set.

[Effects of the Invention] As explained above, the coil bobbin structure in which the terminal portion around which the coil is wound is integrally molded makes it possible to reduce costs by eliminating terminal parts and eliminating the need for a terminal press-fitting process.

Furthermore, when inserting the terminal into a printed circuit board or the like, the tip of the terminal according to the present invention can be shaped into any desired shape, such as a chamfered or rounded shape to facilitate insertion into a mating component. In addition, the terminal root portion can easily be tapered to provide coil stress and the strength of the terminal pin portion. In addition, the length of the terminal part can be processed with high accuracy because it is molded, unlike press-fitting the terminal pin. Note that the integrally molded terminal portion is partially plated or otherwise treated to enable soldering of the coil.

[Brief explanation of drawings]

Figure 1 is an end view of a servometer implementing the present invention. Figure 2 is a plan view of Figure 1. Figure 3 is a detailed diagram of the terminal section of the present invention. Figure 4 is a sectional view of another embodiment. Figure 5 is a plan view of Figure 4. Figures 6 to 8 are cross-sectional views of conventional coil bobbins. 1.8...Coil bobbin 6.7...Coil +a, 8a...Bobbin terminal part Akira ■ Swamp 2 and others flood n Mistake 5 haze

Claims (1)

[Claims] (1) A coil bobbin characterized in that a terminal pin of the coil bobbin to which the winding is wound and soldered is integrally molded with the coil bobbin, and the terminal portion is partially plated with copper or the like.