JP3535848B2 - Coil bobbin device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil bobbin device used for a motor or the like, and more particularly to a coil bobbin device formed by connecting two coil bobbins along their respective axial directions.

[0002]

2. Description of the Related Art Conventionally, a coil bobbin device of this type has been disclosed in, for example, Japanese Utility Model Laid-Open No. 1-60505. In the structure, the two coil bobbins that are coupled in the axial direction have the brim formed at both ends of the winding shaft that winds the coil wire,
On one outer peripheral edge of the brim, a terminal portion in which a terminal to which the coil wire is connected is planted is formed. And 2
The terminal portions of the two coil bobbins are assembled so as to be adjacent to each other in the circumferential direction of the brim of the coil bobbin.

When this coil bobbin device is incorporated in a device such as a motor, a flexible printed board or the like for connecting the coil wire to the circuit of the device such as the motor is connected to each of the terminals of the terminal portion.

[0004]

However, when a flexible printed board or the like is connected to the terminals of the terminal portion and the coil bobbin device is incorporated in a device such as a motor, a load (external force) is applied to the terminals. That is, a load is applied to the terminal portion.

On the other hand, in the above-mentioned coil bobbin device of the prior art, in particular, the terminal portion is subjected to a load applied so as to tilt the terminal in the direction away from the other bobbin along the axial direction of the coil bobbin. There is a drawback that the mechanical strength of the portion is weak and the terminal portion is easily broken at the connecting portion with the collar of the bobbin. Especially in the small coil bobbin device,
Although it is necessary to make the coil bobbin as thin as possible,
Then, the terminal portion is easily broken, which is an obstacle to downsizing of the device.

In view of the above, an object of the present invention is to increase the mechanical strength of a terminal portion in a coil bobbin device of the type described above, especially against a load applied so as to incline the terminal along the axial direction of the coil bobbin. It is to prevent breaking.

[0007]

In order to solve the above problems, according to the present invention, a brim is formed at each end of a winding shaft around which a coil wire is wound, and one outer peripheral edge of the brim is provided.
A cylindrical cover is provided between two coil bobbins each having a terminal portion provided with a terminal to which the coil wire is connected.
In a coil bobbin device configured to be fitted and connected along respective axial directions, reinforcement for engaging with each of the terminal portions of the two coil bobbins and reinforcing mechanical strength of the terminal portions. A member is formed to extend in the direction toward the mating coil bobbin, and each of the reinforcing members has a plurality of overlapping portions that overlap each other in the radial direction of the brim between the reinforcing members, and within each of the plurality of overlapping portions. A configuration is adopted in which the overlapping order of which is at least one and which is at least one set is opposite to the other sets.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. The coil bobbin device of the present embodiment has coil coils wound around coil bobbin 1 shown in FIG. 1 and coil bobbin 1'having the same structure (see FIGS. 2 and 3), and then, as shown in FIGS. The coil bobbins 1 and 1'are connected to each other along their respective axial directions.

First, the structure of the coil bobbin 1 will be described with reference to FIG. Since the structure of the coil bobbin 1'is the same as that of the coil bobbin 1, the description thereof will be omitted. Portions of the coil bobbin 1 ′ that are common to the coil bobbin 1 are indicated by adding a dash to a common number.

As shown in FIG. 1, the main body of the coil bobbin 1 has a hollow cylindrical winding shaft 1a having a hole 1d at both ends thereof.
It has a structure in which collars 1b and 1c having a diameter larger than that of the winding shaft 1a are formed, and the coil wire 7 is wound around the winding shaft 1a (see FIGS. 2 and 3). A shaft of a stator yoke or a magnet rotor (not shown) is inserted into the hole 1d when the coil bobbin device is assembled and incorporated into a motor or the like.

Further, a terminal portion 3 is formed at one location (upper part in the figure) on the outer peripheral edge of one brim 1c, and in the figure, on the upper surface (the outer surface along the radial direction of the brim 1c). Has two straight pin-shaped terminals 2 vertically planted.
As shown in FIGS. 2 and 3, both ends of the coil wire 7 are connected to each of the terminals 2 by being twisted.

Further, in the terminal portion 3, a reinforcing member 4 for reinforcing the mechanical strength of the terminal portion 3 extends toward the other coil bobbin 1'along the axial direction of the coil bobbin 1 (axial direction of the winding shaft 1a). It is formed so as to extend in the direction.

The reinforcing member 4 is formed in a substantially "concave" shape when viewed from above, and the protruding portions projecting toward the coil bobbins 1'on both sides thereof are the overlapping portions 5 and 6.
These overlapping portions 5 and 6 are aligned with the overlapping portions 6'and 5'of the reinforcing member 4 of the coil bobbin 1'to be connected in the vertical direction (diameter of the collar 1c in the state where the coil bobbin device is assembled as described later). Direction). In the figure, the overlapping portion 5 has a lower surface (a surface on the inner side along the radial direction of the collar 1c) in the thickness direction of the reinforcing member 4 (radial direction of the collar 1c) with respect to the lower surface of the other portion of the reinforcing member 4. The overlapping portion 6 is formed as a stepped portion having a stepped portion, and the upper surface (the outer surface along the radial direction of the collar 1c) of the overlapping portion 6 is in the thickness direction with respect to the upper surface of the other portion of the reinforcing member 4. It is formed as a step portion having a step recessed in.

The lower surface of the terminal portion 3 including the reinforcing member 4 is formed in the shape of a part of a cylinder along the outer peripheral edge of the brim 1b. Further, the coil bobbin 1 is integrally molded with plastic by inserting the terminal 2 made of metal.

Next, the assembly of the coil bobbin device will be described. In assembling the coil bobbin device, first, the coil wires 7, 7'are attached to the coil bobbins 1, 1'having the above-described structure.
Is wound and both ends are connected to terminals 2 and 2 '.

Next, as shown in FIGS. 2 and 3, a cylindrical cover 8 is provided between the collars 1c and 1c 'of the coil bobbins 1 and 1'.
So that the overlapped portion 5 overlaps the upper side of the overlapped portion 6 '(outer side in the radial direction of the collar 1c) and the overlapped portion 6 overlaps the lower side of the overlapped portion 5' (inner side in the radial direction of the collar 1c). Then, the reinforcing members 4 and 4'of the terminal portions 3 and 3'are abutted and engaged with each other to connect the coil bobbins 1 and 1'in the axial direction of the respective winding shafts. A coil bobbin device is assembled in the cylinder of the cover 8 and a shaft of a stator yoke or a magnet rotor (not shown) is inserted at the stage of being assembled into a motor or the like.

Due to this connection, the coil bobbins 1, 1 '
May be fixed to the cover 8 by gluing or the like, or the coil bobbins 1 and 1'may be connected by press-fitting the whole assembled state into a portion where the coil bobbin device of a device such as a motor is assembled without fixing. You may

Next, the operation when a load is applied to each of the terminals 2 and 2'of the coil bobbins 1 and 1'of the coil bobbin device assembled as described above so as to fall along the axial direction of the bobbin explain.

First, for each of the terminals 2 and 2 ',
When a load is applied so as to be tilted in the direction of arrow A in FIG. 3 (one direction along the axial direction of the bobbins 1, 1 '), the terminal portion 3 tends to tilt clockwise in FIG. Overlap part 5
Pushes the mating portion 6'downward, but the terminal portion 3'will also tilt clockwise and the overlapping portion 6'will push back the mating portion 5 up. Further, the terminal portion 3 which tends to tilt clockwise contacts the cover 8 and is prevented from tilting. In this way, the inclination of the terminal portions 3, 3'is suppressed.

Further, for each of the terminals 2 and 2 ',
When a load is applied in the direction of arrow B opposite to the direction of arrow A in FIG. 3, the terminal portion 3 leans counterclockwise in FIG. Push in the direction, but the terminal portion 3 ′ also tries to tilt counterclockwise and the overlapping portion 5 ′
Pushes back the overlapping portion 6 of the opponent. Further, the terminal portion 3'which tends to tilt counterclockwise contacts the cover 8 and is prevented from tilting. In this way, the inclination of the terminal portions 3, 3'is suppressed.

When a load is applied only to the terminal 2 in the direction of arrow A, the overlapping portion 5 of the reinforcing member 4 pushes the opposite overlapping portion 6'downward as the terminal portion 3 tilts clockwise,
Due to the elasticity of the terminal portion 3 ′, the overlapping portion 6 ′ pushes the opposite overlapping portion 5 back upward. Further, the terminal portion 3 which tends to tilt clockwise contacts the cover 8 and is prevented from tilting. In this way, the inclination of the terminal portion 3 is suppressed.

When a load is applied only to the terminal 2 in the direction of the arrow B, the terminal portion 3 tends to incline counterclockwise and the overlapping portion 6 pushes the opposite overlapping portion 5'upward. ′
Due to the elasticity of the overlapping portion, the overlapping portion 5'pushes the opponent overlapping portion 6 downward. In this way, the inclination of the terminal portion 3 is suppressed.

Further, only the terminal 2'is in the direction of arrow A or B.
The same applies when a load is applied in the direction.

As described above, according to this embodiment, the terminals 2,
Even if a load is applied so as to incline 2 ′ along the axial direction of the coil bobbins 1, 1 ′, the inclination of the terminal portions 3, 3 ′ can be suppressed by the action of the reinforcing members 4, 4 ′, and the terminal due to the inclination can be suppressed. It is possible to prevent breakage of the parts 3, 3 '. That is, the mechanical strength of the terminal portions 3, 3'with respect to the above load can be reinforced by the reinforcing members 4, 4 ', and the terminal portions 3, 3'can be prevented from being broken due to the above load. The coil bobbin device can be downsized by making 1 'thin.

In the embodiment described above, the two reinforcing portions 5, 6 and 5 ', 6'are provided on the reinforcing members 4, 4'of the terminal portions 3, 3', respectively. It is needless to say that a plurality of the above may be provided, and in that case, at least one set of the overlapping portions in each of the plurality of overlapping portions (either the overlapping portion of the overlapping reinforcing member 4 or the overlapping portion of the reinforcing member 4 ′ is overlapped). It suffices that the order of which is above) is the reverse of the other. Further, the terminal may be a molding member integrally molded with the terminal portion.

[0026]

As is apparent from the above description, according to the present invention, a collar is formed at each end of a winding shaft around which a coil wire is wound, and the coil wire is provided on one outer peripheral edge of the collar. A coil bobbin device constructed by fitting two coil bobbins, each having a terminal portion provided with a terminal to be connected with each other, with a cylindrical cover fitted between the coil bobbins and connecting them along their respective axial directions. In particular, it is possible to increase the mechanical strength of the terminal portion against a load applied so as to incline the terminal along the axial direction of the coil bobbin, and prevent the terminal portion from being broken due to the load. Therefore, the excellent effect that the coil bobbin can be thinned and the coil bobbin device can be miniaturized can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structure of a coil bobbin that constitutes a coil bobbin device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the structure of the coil bobbin device of the same embodiment.

FIG. 3 is a front view showing the structure of the coil bobbin device of the same embodiment.

[Explanation of symbols]

1,1 'coil bobbin 1a reel 1b, 1b ', 1c, 1c' brim 1d hole 2,2 'terminals 3,3 'terminal part 4,4 'Reinforcement member 5,5 ', 6,6' Overlapping part 7,7 'coil wire 8 covers

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Claims (2)

(57) [Claims] 1. A brim is formed at each end of a winding shaft around which a coil wire is wound, and a terminal portion provided with a terminal to which the coil wire is connected is formed at one outer peripheral edge of the brim.
Two coil bobbins fitted with cylindrical covers between each other
In the coil bobbin device configured to be connected along each axial direction, a reinforcing member for engaging with each other of the terminal portions of the two coil bobbins to reinforce the mechanical strength of the terminal portions is provided. The reinforcing member is formed to extend in a direction toward the mating coil bobbin, and each of the reinforcing members has a plurality of overlapping portions that overlap each other in the radial direction of the brim between the reinforcing members, and at least one of the overlapping portions is formed. A coil bobbin device characterized in that the overlapping order of which is the upper side and which is the lower side is opposite to that of the other groups. 2. The overlapping portion of the reinforcing member is a protruding portion that protrudes in a direction toward a mating coil bobbin, and the overlapping portion of the reinforcing member is different from the surface on one side or the opposite side in the radial direction of the brim. The coil bobbin device according to claim 1, wherein the coil bobbin device is formed as a step portion having a step recessed in a radial direction of the collar with respect to a portion.