JPH0723012Y2 - Bobbins - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a bobbin for winding a winding. More specifically, the present invention relates to a bobbin used for a motor or the like.

(Prior Art) Conventionally, there are a taping method and a terminal driving method as a method of winding a winding on a bobbin. In the taping method, the lead wire 101 is manually fixed to the bobbin 102, the magnetnet wire 103 constituting the winding is wound around the conductive portion, soldered, and then insulated and fixed with a tape 104 (see FIG. 9). ). In addition, the terminal driving method is to drive the terminals 202 into the wall (flange portion) 201 of the bobbin 204 from the radial direction,
The winding of the magnetnet wire 203 is mechanized, and the efficiency is improved by automatic entanglement (see FIG. 10).

(Problems to be solved by the invention) However, in the case of the taping type bobbin, the winding work of the magnetnet wire 103 and the like are manual work, so that the quality and productivity of the bobbin depend on the skill of the operator, Variation and productivity decline. Therefore, a terminal driving method that can be automated is desired.
In this case, since the wall 201 into which the terminals are driven must be made thicker, the winding space becomes smaller than that of the taping type as shown in the figure, which is a bottleneck when applied to a thin motor. Normally, bobbin flange (wall) 20
The thickness of 1 is thin because it is enough to maintain electrical insulation, but when the terminal driving method is used, the magnetnet wire is entangled with the terminal and torn off at the terminal edge, so considerable mechanical strength is applied. Required on the wall. Therefore, if the wall thickness is increased, the winding space is reduced, and there is a weakness that the motor cannot obtain sufficient characteristics. Therefore, we are struggling with the recent demands for thinness and miniaturization.

An object of the present invention is to provide a bobbin of a terminal driving type which can secure a sufficient winding space and can be downsized.

(Means for Solving the Problem) In order to achieve the above object, a bobbin according to the present invention comprises a body around which a winding is wound, and a winding formed between both ends of the body. A flange portion that defines a space, a plurality of terminals for tying the ends of the winding, and a portion of the flange portion for fixing the terminals is made thicker than the flange portion, at least on the winding space side. The terminal-holding convex portion is protruded toward the terminal-holding convex portion, and the terminal-holding convex portion and a flange portion thinner than the terminal-holding convex portion are provided with a circumferential slope portion that eliminates a step on the surface on the winding space side.

(Operation) Therefore, the portion of the flange portion into which the terminal is driven is partially formed thick, and mechanical strength sufficient for driving the terminal is obtained. In addition, since the wire is guided by the slope in the vicinity of the terminal-holding protrusion, even when the winding is automatically entangled, the wire will move smoothly over the protrusion from the flange surface and the wire will catch on the protrusion. There is no. Further, since the winding wound around the terminal-holding convex portion also enters under the convex portion, the reduction of the winding space in this portion is not so large and there is substantially no influence.

(Embodiment) Hereinafter, the configuration of the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 shows an embodiment of the bobbin of the present invention. This bobbin 1 comprises a body 3 around which the winding 2 is wound and a flange 4 for holding the winding 2 from the side, and a convex portion 5 for driving the terminal 7 is formed on the flange 4. There is. Usually, the bobbin 1 is integrally formed of an insulating material such as a synthetic resin with a body portion 3, a flange portion 4, and at least a terminal driving projection portion 5 projecting toward the winding space side. Terminal holding protrusion 5
Respectively protrude slightly inside (on the side where the winding 2 is wound) and outside of the bobbin 1 and form an inclined portion 6 at least inside the flange portion 4 and with the surrounding flange inner surface 4a. It is connected smoothly and smoothly.

Here, the amount of protrusion of the convex portion 5 to the outside is determined by the plate thickness t of the case (core) 11 shown in FIG. 3 described later. At this time,
It is preferable to increase the mechanical strength of the convex portion 5 by taking the amount of protrusion as much as possible within a range smaller than the plate thickness t of the case 11. Further, it is preferable that the distance from the outer end surface of the convex portion 5 to the center of the terminal driving hole 9 is as long as possible. If this dimension is short, the distance (+) between the left and right terminals on the board 10 in FIG. 2 becomes short, and the strength of the board and the route of the pattern cannot be routed, causing a trouble such as a short circuit during soldering. . Furthermore, the inner surface of the flange
It is preferable that the protruding amount of the convex portion 5 from the 4a is large in order to increase the mechanical strength after driving the terminal, but if it is too large, the winding work of the magnet wire will be hindered, so it is set appropriately. As shown in FIG. 1 (B), the convex portion 5 to the inner surface side protrudes to a depth slightly closer to the body portion 3 than the terminal driving hole 9 in the radial direction. The convex portion 5 and the surrounding flange inner surface 4a are connected by a slanted surface portion 6 to eliminate a step portion. Therefore, there is no trouble that the magnet wire is caught by the wire during the winding and the wire is broken, and if the nozzle of the winding machine (not shown) is shaken fully outside the bobbin outer diameter, the lower side of the convex portion 5 Also the magnet wire is caught. Further, in order to further increase the strength, it is possible to form the convex portion 5 so as to project to the body portion 3 at the bottom of the flange portion 4. In this case, the wire is wound so as to undulate at the convex portion 5, and the reduction of the winding space is slight as compared with the case where the flange thickness is increased over the entire circumference.

As shown in FIG. 2, the terminal driving hole 9 is formed in the substrate 10
The central common hole (common hole) among the six holes 9 is enlarged. This is because in the case of bifeller winding (unipolar drive), two magnet wires are wound around the terminal 7 in the middle, so that it is considerably thicker than both ends. If holes 9 of the same size are opened in the board 10 as in the conventional case, it is difficult to insert the common terminals, and if a large hole is formed to fit the common terminals, even if the terminals on both ends are soldered, Since the holes are large, there is a risk of poor conduction. Therefore, the middle two of the six holes are made larger than the both-end holes.

3 and 4 show an example in which the bobbin of the present invention is applied to a motor. In this embodiment, two bobbins 1 are housed in two symmetrically arranged cases 11, and a bearing 13 is held via a bobbin side wall 12 provided on one foot. In the figure, reference numeral 14 is a magnet, and 15 is a rotating shaft. Case 11
As shown in Fig. 5, the center of the rotating shaft 15 and the magnet
A space for inserting or arranging the bobbin side wall 14 and the bobbin side wall 12 is formed by pole teeth 11a bent at a right angle inward. The pole teeth 11a are formed by being punched out by a press or the like and then bent, and support the bobbin 1 so as to embrace the bobbin 1 inside.

Conventionally, the bobbin 1 need only be housed inside the case 11, and the positional accuracy is not limited. However, in this embodiment, the bobbin 1 has a function of holding the bearing 13 and thus is fitted into the case 11. At this time, it is necessary to maintain the position with the pole teeth 11a formed by punching and bending a part of the case 11 with high accuracy. Therefore,
By providing the bobbin 1 side with a portion that fits into the punching portion 11b that can maintain high precision, when assembled in the case 11, the positional relationship with the inner diameter of the pole tooth 11a formed by bending can be maintained with high precision. I chose That is, as shown in FIG. 7, a bobbin side wall 12 is integrally provided on one side of the bobbin 1 in advance, and the bobbin side wall 12 and the punched portion 11b of the case 11 are fitted to each other to position and support the case 11. I am trying. As shown in FIG. 6, the bobbin side wall 12 has a protrusion 12b which is fitted with the punched portion 11b of the case 11 and has a punched portion 11 of the case 11.
Corresponding to b, it is provided at a constant pitch, and case 1 is in between.
A concave portion 12c that contacts the bent portion 11c of 1 is formed.
As shown in FIG. 1, one side of the bobbin 1 is provided with a bobbin side wall.
In some cases, when the bobbin 1 is not provided, it is sufficient to simply store the bobbin 1 in the case 11.

Further, since a pulley and a pinion are attached to the shaft 15, a radial force acts on the shaft as a reaction force. Therefore, it is necessary to increase the stress resistance of the bobbin side wall 12 of the bobbin 1 supporting this. Therefore, the outer shape R ₁ of the boss portion 12a of the bobbin side wall 12 of the bobbin ₁ and the center hole diameter R ₂ of the mounting plate 16 mounted on the case 11 are matched and reinforced by the mounting plate 16.

Although the above embodiment is an example of the preferred embodiment of the present invention,
The present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention. For example, the 8th
As shown in the figure, it is also possible to project the terminal driving projection 5 only on the side surface of the winding and to provide the outer surface 4b of the flange 4 and the surface of the projection 5 on the same surface. Further, since the slanted surface portion 6 is to prevent the wire from being broken by being caught on the edge of the convex portion 5 when the winding wire 2 is wound, a step between the convex portion 5 and the inner surface 4a of the flange, particularly in the circumferential direction, is formed. It suffices to provide it only on the portion, but it may be provided on the outer surface or the like to avoid stress concentration. Further, the terminal 7 is held by the projection 5 by driving, but it may be attached by press fitting or adhesion. Also,
In the present embodiment, the thickness of the flange portion 4 is slightly thicker on the side where the convex portion 5 is formed than that on the other side, but it is also possible to form the same thickness on the left and right sides as a whole.

(Effect of the Invention) As is apparent from the above description, in the bobbin of the present invention, only the portion of the flange portion into which the terminal is driven is partially thickened to form the terminal-holding convex portion. At least it protrudes to the winding space side, and the step between this terminal-holding convex part and the thin flange part is connected by the sloped part, so the wire also enters under the terminal-holding convex part along the sloped part. Therefore, the mechanical strength of the terminal driving portion can be improved without reducing the winding space so much, and the overall size can be reduced.

In addition, since the slanted surface portion smoothly guides the wire in the vicinity of the terminal-holding convex portion, the terminal-driving convex portion is not caught when the winding is wound on the bobbin, and the wire is not broken. Therefore, according to the bobbin of the present invention, it is possible to automate the winding in the winding space which is almost the same as that of the taping type bobbin.

[Brief description of drawings]

FIG. 1 shows an embodiment of the bobbin of the present invention.
(A) is a front view, (B) is a side view of a semi-section, (C) is a plan view of a convex portion, FIG. 2 is an enlarged plan view of a substrate, and FIG. 3 is a motor applying the bobbin of the present invention. FIG. 4 is a perspective view of a case, FIG. 6 is a front view of a bobbin side wall, and FIG. 7 is another embodiment of the present invention. FIG. 8 is an enlarged plan view of a convex portion showing another embodiment, FIG. 9 is a conventional taping type bobbin, and FIG. 10 is a central longitudinal section showing an example of a conventional terminal driving type bobbin. It is a side view. DESCRIPTION OF SYMBOLS 1 ... Bobbin, 3 ... Body part, 4 ... Flange part, 4a ... Flange inner surface, 5 ... Terminal drive projection, 6 ... Slope part, 7 ... Terminal.

Claims (1)

[Scope of utility model registration request] 1. A body portion around which a winding is wound, a flange portion formed at both ends of the body portion to define a winding space between the body portion, and an end portion of the winding. A plurality of terminals for entanglement, and a terminal holding projection for projecting at least the winding space side by making a part of the flange portion thicker than the flange portion for fixing the terminal, and the terminal A bobbin comprising: a holding convex portion and a circumferential slant surface portion that eliminates a step on the winding space side of the flange portion that is thinner than the holding convex portion.