Bobbin and winding coil using the same

Abstract

To provide a bobbin in which a winding is easily wound, and a winding coil using the bobbin.SOLUTION: A bobbin 20 is provided with a cylindrical part 30 and a pair of an upper flange part 40 and a lower flange part 50 extending outward from a cylindrical portion 30 and a winding 70 is wound around the bobbin 20 to form a winding coil 10. A through hole 53 penetrating in the direction of an axis C of the bobbin 20 is disposed in the lower flange part 50, and a groove 55 which is continuous with the through hole 53 and can accommodate the winding 70 is disposed on a surface of the lower flange part 50 opposite to a side on which the winding 70 is wound.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a bobbin on which a winding is wound and a winding coil using the same. [Background technology]

[0002] An example of an excitation coil (winding coil) used in a conventional solenoid is described in Patent Document 1, previously filed by the present applicant. According to this document, the solenoid includes an excitation coil (winding coil), a fixed iron core, a movable iron core that is movable toward and away from the fixed iron core, and a movable pin that is attached to one end of the movable iron core and transmits the movement of the movable iron core. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-169492 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when manufacturing the above-mentioned excitation coil (wound coil), the start of winding the wire is secured with insulating tape on the inside of the bobbin (the side where the wire is wound).However, a step is created in the insulating tape area, which can make winding the wire difficult.

[0005] The present invention is intended to solve the above-mentioned problems, and has an object to provide a bobbin onto which a winding can be easily wound, and a winding coil using the same. [Means for solving the problem]

[0006] In the invention of claim 1, there is provided a bobbin including a cylindrical portion and a pair of flange portions extending outward from the cylindrical portion, and a winding is wound around the bobbin to form a winding coil, The flange portion has a through hole penetrating the bobbin in the axial direction; A groove that is continuous with the through hole and that can accommodate the winding is disposed on the surface of the flange portion opposite to the side on which the winding is wound.

[0007] According to this, by inserting the winding into the through hole and then placing it in a groove on the surface opposite to the side on which the winding is wound, it is possible to prevent steps from occurring on the surface of the flange portion on which the winding is wound, making it possible to make the bobbin easy to wind the winding.

[0008] The through-hole is formed so as to be inclined at an angle ranging from 10 degrees to 45 degrees with respect to a direction perpendicular to the axis of the bobbin.

[0009] According to this, if the angle of the through hole relative to the direction perpendicular to the axis of the bobbin is too large, a strain is placed on the winding when it is inserted into the groove, and if the angle is too small, it becomes difficult to process the through hole, so it is possible to achieve both a strain on the winding and ease of processing.

[0010] The flange portion and the cylindrical portion are formed separately, a male threaded portion is formed on the cylindrical portion, and a female threaded portion that can be threadedly engaged with the male threaded portion is formed on the flange portion, At least one of the flange portions is movable relative to the cylindrical portion along the axial direction of the bobbin.

[0011] However, since the wire diameter of the winding changes depending on the voltage during the manufacturing process, if the axial dimension of the bobbin is constant, a gap may occur between the winding and the flange depending on the wire diameter, causing the winding that does not fit into the gap to shift and making it impossible to wind the winding in order. Therefore, by making the flange movable along the axial direction of the bobbin, it is possible to wind the winding in order.

[0012] The invention of claim 4 is a winding coil, comprising the bobbin of any one of claims 1, 2, or 3, and a winding wound around the bobbin.

[0013] This makes it possible to provide a wound coil that exhibits the effects of the bobbin.

[0014] Furthermore, if the cross section of the winding is rectangular, it is possible to provide a winding coil with improved space factor and skin effect of the winding. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a longitudinal cross-sectional view of a winding coil according to an embodiment of the present invention. [Figure 2] FIG. 2 is a vertical cross-sectional view of the bobbin according to the embodiment. [Figure 3] FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. [Figure 5] FIG. 2 is a perspective view of the bobbin as seen from below. [Figure 6] FIG. 2 is a perspective view of the bobbin as seen from above. [Figure 7] FIG. 2 is an explanatory diagram of a manufacturing process of a winding coil. [Figure 8] FIG. 8 is a continuation of FIG. 7. [Figure 9] FIG. 10 is an explanatory diagram of aligned winding when it is assumed that the flange portion cannot move. DETAILED DESCRIPTION OF THE INVENTION

[0016] An embodiment of a winding coil using a bobbin of the present invention will be described with reference to the drawings. In the following description, when arrows are added to the drawings, U indicates the top and D indicates the bottom, but this is for ease of explanation and does not limit the directions when implemented. Furthermore, the drawings are for understanding the invention and the scale, aspect ratio, etc. are not necessarily consistent.

[0017] 1, the winding coil 10 includes a bobbin 20 and a winding 70. In this embodiment, the winding coil 10 is used in an article such as a solenoid valve.

[0018] The bobbin 20 is made of an insulating material, and includes a cylindrical portion 30 and a pair of upper and lower flange portions 40 and 50 extending outward from the cylindrical portion 30, as shown in FIGS.

[0019] The tubular portion 30 is formed in a cylindrical shape, and an upper male threaded portion 33 and a lower male threaded portion 34, each having a male thread, are arranged at an upper end 31 and a lower end 32 in the vertical direction (direction of the axis C of the bobbin 20).

[0020] The upper flange portion 40 and the lower flange portion 50 are formed in the shape of an annular plate having insertion holes 41 and 51, respectively. The insertion holes 41 and 51 have internal threads 42 and 52 formed on the inner periphery thereof that can be threadedly engaged with the upper external thread portion 33 and the lower external thread portion 34.

[0021] In this embodiment, the upper flange portion 40 is movable relative to the cylindrical portion 30 along the axis C of the bobbin 20. The lower flange portion 50 is screwed onto the cylindrical portion 30 and then fixed thereto.

[0022] The lower flange portion 50 is provided with a through-hole 53 that penetrates in the direction of the axis C of the bobbin 20. In this embodiment, as shown in Figures 3, 4, 6, and 7, the through-hole 53 has a diameter of 1 mm and is formed so as to be inclined at 30 degrees with respect to the direction perpendicular to the axis C of the bobbin 20.

[0023] Furthermore, a groove 55 that is continuous with the through-hole 53 and can accommodate the winding 70 is arranged on the surface (inner surface) of the lower flange 50 opposite to the side on which the winding 70 is wound. In this embodiment, as shown in Figures 3 to 7, the groove 55 is formed as a bottomed groove extending from the lower surface to the upper surface of the lower flange 50, and is formed with a width of 1 mm and a depth of 1 mm.

[0024] The winding 70 is made of copper and has a rectangular cross section with a width of 0.27 mm, as shown in FIGS.

[0025] The manufacturing process of the winding coil 10 will be described below. In Figures 2, 5, and 6, the upper flange portion 40 is movable along the axis C of the bobbin 20 relative to the tubular portion 30, and the lower flange portion 50 is fixed after being screwed onto the tubular portion 30, with no winding 70 wound around the bobbin 20.

[0026] 7, the winding 70 is inserted into the through-hole 53 from the inside (the side of the lower flange portion 50 on which the winding 70 is wound) and enters the groove 55 that is continuous with the through-hole 53. The winding 70 placed in the groove 55 is fixed by applying insulating tape (not shown) from the underside of the lower flange portion 50.

[0027] Through hole 53 has a diameter of 1 millimeter and is formed so as to be inclined at 30 degrees relative to a direction perpendicular to axis C of bobbin 20. This means that no strain is placed on winding 70 when it is inserted from through hole 53 into groove 55, making it easier to process through hole 53. This achieves both a reduction in strain on winding 70 and ease of processing.

[0028] Once one end of the winding 70 is fixed, the winding 70 is wound around the tubular portion 30. Once the winding 70 has been wound up to near the end of the tubular portion 30, the upper flange portion 40 is moved in the vertical direction (the direction of the axis C of the bobbin 20) to close the gap with the winding 70, as shown in FIG.

[0029] Then, the second and subsequent windings of the winding 70 are performed. When the winding 70 reaches a predetermined winding amount, the winding coil 10 is completed.

[0030] The winding 70 has a rectangular cross section and the upper flange portion 40 is movable, so that the winding can be wound in an aligned manner without any gaps.

[0031] This allows the winding coil 10 to have improved space factor and skin effect of the winding 70.

[0032] The winding coil 10 having the above-described configuration is a bobbin 20 including a cylindrical portion 30 and a pair of upper flange portions 40 and lower flange portions 50 extending outward from the cylindrical portion 30, and the winding coil 10 is formed by winding a wire 70 around the bobbin 20, The lower flange portion 50 has A through hole 53 is provided to penetrate the bobbin 20 in the direction of the axis C, A groove 55 that is continuous with the through-hole 53 and that can accommodate the winding 70 is provided on the surface of the lower flange portion 50 opposite to the side on which the winding 70 is wound.

[0033] According to this, by inserting the winding 70 into the through hole 53 and then arranging it in the groove 55 on the surface opposite to the side on which the winding 70 is wound, it is possible to prevent a step from occurring on the surface of the lower flange portion 50 on which the winding 70 is wound, thereby making it possible to make the bobbin 20 easy to wind the winding 70.

[0034] The through-hole 53 is formed so as to be inclined at 30 degrees with respect to a direction perpendicular to the axis C of the bobbin 20 .

[0035] According to this, if the angle of through hole 53 with respect to the direction perpendicular to axis C of bobbin 20 is too large, a burden is placed on winding 70 when it is inserted into groove 55, and if the angle is too small, it becomes difficult to process through hole 53, so it is possible to achieve both a reduction in the burden on winding 70 and ease of processing.

[0036] In addition, the upper flange portion 40, the lower flange portion 50 and the cylindrical portion 30 are configured as separate bodies, The cylindrical portion 30 is formed with an upper male thread portion 33 and a lower male thread portion 34, and the upper flange portion 40 and the lower flange portion 50 are formed with female thread portions 42 and 52 that can be threaded with the upper male thread portion 33 and the lower male thread portion 34, The upper flange portion 40 is movable relative to the cylindrical portion 30 along the axis C of the bobbin 20 .

[0037] According to this, in the manufacturing process, the wire diameter of the winding 70 changes depending on the voltage, and if the dimension of the bobbin 20 in the direction of the axis C is constant (a state in which the upper flange portion 40 cannot move), a gap will form between the winding 70 and the upper flange portion 40 depending on the wire diameter of the winding 70, as shown in Fig. 9, and the winding 70 that cannot fit into the gap will shift, making it impossible to wind the winding in an aligned manner. Therefore, by making the upper flange portion 40 movable along the direction of the axis C of the bobbin 20, it is possible to wind the winding 70 in an aligned manner.

[0038] When the present invention is viewed as a winding coil 10 , it comprises a bobbin 20 and a winding 70 wound around the bobbin 20 .

[0039] This makes it possible to provide a winding coil 10 that exhibits the effects of the bobbin 20 described above.

[0040] Furthermore, since the cross section of the winding 70 is rectangular, it is possible to provide a winding coil 10 in which the space factor and skin effect of the winding 70 are improved.

[0041] The winding coil 10 of the present invention is not limited to the above configuration, and various design modifications are possible without departing from the gist of the present invention.

[0042] For example, the winding 70 used has a rectangular cross section, but windings having other cross sections such as a circular, elliptical, or oval shape are also applicable.

[0043] Furthermore, the through hole 53 can be appropriately modified and formed so that it is inclined in the range of 10 degrees to 45 degrees relative to a direction perpendicular to the axis C of the bobbin 20, as long as it is possible to achieve both a reduced burden on the winding 70 and ease of processing.

[0044] The winding coil 10 can also be used in items other than solenoid valves.

[0045] It is also possible to make both the upper flange portion 40 and the lower flange portion 50 movable relative to the cylindrical portion 30 along the axis C of the bobbin 20 .

[0046] Furthermore, the configuration that allows the lower flange portion 50 to move along the axis C of the bobbin 20 relative to the cylindrical portion 30 can be realized by using existing means other than a screw, such as a cylinder and a hole.

[0047] Furthermore, the winding 70 may be made of a metal other than copper, as long as it is electrically conductive.

[0048] Furthermore, the shapes, dimensions, etc. of the cylindrical portion 30, the upper flange portion 40, and the lower flange portion 50 can be changed as appropriate depending on the manner of use. [Explanation of symbols]

[0049] 10 winding coil 20 bobbins 30 Cylinder part 33 Upper male thread 34 Lower male thread 40 Upper flange 42 Female thread 50 Lower flange 52 Female thread 53 Through hole 55 Groove 70 windings C axis

Claims

1. A bobbin including a cylindrical portion and a pair of flange portions extending outward from the cylindrical portion, wherein a winding is wound around the bobbin to form a winding coil, The flange portion has a through hole penetrating the bobbin in the axial direction; a groove, connected to the through hole and capable of accommodating the winding, disposed on a surface of the flange portion opposite to the side on which the winding is wound;

2. 2. The bobbin according to claim 1, wherein the through-hole is formed so as to be inclined at an angle ranging from 10 degrees to 45 degrees with respect to a direction perpendicular to the axis of the bobbin.

3. The flange portion and the cylindrical portion are formed separately, a male threaded portion is formed on the cylindrical portion, and a female threaded portion that can be threadedly engaged with the male threaded portion is formed on the flange portion, 2. The bobbin according to claim 1, wherein at least one of the flange portions is movable relative to the cylindrical portion along the axial direction of the bobbin.

4. A winding coil comprising: the bobbin according to claim 1; and a winding wound around the bobbin.

5. 5. The wound coil according to claim 4, wherein the cross section of the winding is rectangular.

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