JP2013219222A - Bobbin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin capable of achieving a narrow pitch between connection terminals and mechanically winding a coil end part around even an entwining terminal.SOLUTION: A cylindrical coil part 1 obtained by winding a coil between flanges 2 formed at both end parts and a terminal planting part 5 formed integrally with the flanges 2 of the coil part 1 are provided, a plurality of terminals 6 with a coil end part wound therearound are planted in the terminal planting part 5, the plurality of terminals 6 are projected such that entwined end parts 6a with a coil end part wound therearound are formed in one line from one outer circumferential surface 5a of the terminal planting part 5, connection end parts 6b of the other end part are projected so as to form one line from the other outer circumferential surface 5b of the terminal planting part 5, and intermediate parts 6c between the entwined end parts and the connection end parts 6b are arranged radially with extension lines Cto the connection end part side of each axis line intersected.

Description

  The present invention relates to a bobbin in which a coil is wound and a terminal around which an end of the coil is wound is implanted in various motors such as a stepping motor.

As is well known, a stepping motor includes a cylindrical stator in which a yoke for forming a magnetic circuit is integrally provided on a bobbin around which a coil is wound, and a rotating stator and a peripheral portion provided in the stator. Is roughly constituted by a rotor magnetized with.
In general, the bobbin has a terminal plant such as a terminal block or a connector in which a terminal having a coil end wound around one end and a terminal having the other end connected to an external connection portion is implanted. The installation part is integrally formed.

5 to 8 show a stator portion of a stepping motor provided with this type of bobbin previously proposed by the present applicant in Patent Document 1 below.
The stator 20 is wound around a plurality of yokes 21 for constituting a magnetic circuit, a bobbin 22 made of an insulating synthetic resin that integrally holds these yokes 21, and a winding portion 23 of the bobbin 22. A terminal planting portion 25 having a cylindrical connector portion 24 that opens in the axial direction is formed integrally with one end portion in the axial direction of the bobbin 22. ing.

  Here, a plurality of (six in this embodiment) terminals 26 for connecting the coil wound around the bobbin 22 to a female contact (not shown) are implanted in the terminal planting portion 25. The plurality of terminals 26 project the connection end portion 26a from the end face in the connector portion 24, and are bent by 90 ° with respect to the connection end portion 26a in the terminal planting portion 25, and the other end portion. Projecting from the outer peripheral surface 25a of the terminal planting portion 25 adjacent to the coil as the binding end portion 26b.

  In addition, the plurality of terminals 26 are insert-molded in the terminal planting portion 25 at equal intervals, so that the connection end portion 26a and the binding end portion 26b are between the adjacent ones. They are arranged on a straight line at intervals.

Japanese Patent Laid-Open No. 2005-020938

  By the way, with the recent miniaturization of electrical equipment, there is an increasing number of specifications for stepping motors, in which the pitch between adjacent connection end portions 26a in the connector portion 24 is as narrow as 1.5 mm, for example. .

  However, since the terminals 26 are generally arranged at regular intervals in the terminal planting portion 25, the pitch of the binding end portions 26b protruding from the outer peripheral surface 25a must be the same narrow pitch. Disappear. For this reason, when the coil end is gripped by the binding device and mechanically wound around the binding end portion 26b, the coil gripping portion of the binding device interferes with the adjacent binding end portion 26b. As a result, there arises a problem that the work cannot be performed.

  The present invention has been made in view of the above circumstances, and can realize a narrow pitch between connection terminals and mechanically wind an end portion of a coil around a binding terminal. It is an object to provide a bobbin.

  In order to solve the above problems, the invention according to claim 1 is formed integrally with a cylindrical winding portion in which a coil is wound between flanges formed at both ends, and the flange of the winding portion. A bobbin provided with a plurality of terminals around which the end of the coil is wound around the terminal planting portion. The wound end portion is projected so as to form a row from one outer peripheral surface of the terminal planting portion, and the connection end portion of the other end portion is arranged from the other outer peripheral surface of the terminal planting portion. The intermediate portion between the binding end portion and the connection end portion is arranged radially so that the extension lines to the connection end portion side of each axis intersect with each other. The interval between the connecting ends is set smaller than the interval between the binding ends. It is intended.

  According to a second aspect of the present invention, in the first aspect of the present invention, the tips of the connection end portions are positioned on a straight line at equal intervals, and the binding end portion is on an arc. It is located and it is fixed to the said terminal planting part, It is characterized by the above-mentioned.

  In the present invention, the intermediate portion between the binding end portion and the connection end portion is arranged radially so that the extension lines to the connection end portions of the respective axis lines intersect each other. The axis of the intermediate portion of the terminal is not limited to intersecting at one point in the extension line toward the connection end, but it is only necessary to intersect with the extension line of another axis. In the plan view from the outer peripheral surface side or the other outer peripheral surface side, the interval between the intermediate portions of the adjacent terminals is arranged so as to gradually increase from the connecting end side toward the binding end side. It only has to be.

  According to the invention described in claim 1 or 2, the plurality of terminals are connected to the terminal planting portion, and the binding end portion and the connection end portion are arranged so that the extension lines to the connection end portions of the respective axes intersect. Since the intermediate portion between them is arranged radially, the interval between the adjacent connection end portions becomes smaller than the interval between the binding end portions.

  As a result, even when the pitch of the connecting end portions protruding in a row from the other outer peripheral surface of the terminal planting portion is set to the required narrow pitch, the one of the terminal planting portion is The pitch of the binding ends protruding in a row from the outer peripheral surface can be ensured more widely, so that the end of the coil can be connected to the binding terminals without causing interference with the adjacent binding terminals. Can be wound mechanically.

  According to the second aspect of the present invention, when the plurality of terminals are arranged so that the intermediate portions thereof are radial, the tips of the connecting end portions are positioned on a straight line at equal intervals, and By positioning the binding ends on the arc, it is possible to use the same shape as the plurality of terminals.

  At this time, since the tips of the connection end portions are positioned on a straight line at equal intervals, there is no hindrance to the connection with the external connection portion, and the binding end portion is on the arc. Since it is arranged, it is possible to further ensure a wider space between the adjacent end portions without increasing the area of the one outer peripheral surface of the terminal planting portion.

It is a top view which shows one Embodiment of the bobbin which concerns on this invention. It is a front view of FIG. It is a side view of FIG. It is a bottom view of FIG. It is a front view which shows the stator part of the stepping motor provided with the conventional bobbin. It is a longitudinal cross-sectional view of FIG. It is a top view of FIG. FIG. 8 is a left side view of FIG. 7.

  1 to 4 show an embodiment in which a bobbin according to the present invention is applied to a bobbin of a stepping motor. Reference numeral 1 in the figure denotes a flange 2 formed at both ends, and a coil is wound around the outer periphery. It is a cylindrical winding part. And the terminal planting part 3 is integrally molded by the outer end surface 2a of the flange 2 of the one end part side of this coil | winding part 1. FIG.

  The terminal planting portion 3 includes a leg portion 4 projecting outward in the axis C direction of the winding portion 1 from the outer peripheral edge portion of the outer end surface 2 a of the flange 2, and a radially outward portion from the tip portion of the leg portion 4. A plurality of (six in the figure) terminals 6 are arranged in a row at substantially equal intervals in the longitudinal direction of the planting part 5. So that it is planted.

  Incidentally, these terminals 6 are members of the same shape, and are formed by integrally molding the winding part 1 and the terminal planting part 5 by injection molding and then being embedded in the terminal planting part 5 by press-fitting.

  Each of these terminals 6 is bent at 90 ° in the planting part 5, so that the binding terminal 6 a to which the end of the coil wound around the winding part 1 is connected is connected to the above-described part of the planting part 5. It protrudes from the outer peripheral surface (one outer peripheral surface) 5a facing in the direction of the axis C. Further, these terminals 6 are formed by projecting the other end portions of the terminals 6 from the outer peripheral surface 5b which is orthogonal to the outer peripheral surface 5a and located radially outward of the winding portion 1, and is bent by 90 °. The connected end 6b is arranged on the winding part 1 side substantially parallel to the axis C.

Here, as shown in FIGS. 1 and 4, the terminal 6 has an intermediate portion 6c between the binding end portion 6a and the connection end portion 6b extending outward of the connection end portion 6b of each axis. The lines C ₁ are arranged in a radial pattern intersecting at one point P. Thereby, the space | interval of the adjacent connection edge part 6b is set smaller than the space | interval of the binding edge part 6a.

  Furthermore, these terminals 6 are arranged so that the tips of the connecting end portions 6b are positioned on a straight line at equal intervals. As a result, the binding end portion 6a is centered on the intersection point P. Arranged on an arc.

  A bobbin having the same shape winding portion 1 and flange 2 is coaxially arranged on the other flange 2 side of the bobbin having the above-described configuration, and is arranged around the inner peripheral surface of each winding portion 1. A yoke having a plurality of pole teeth arranged in the direction is arranged, and the end of the coil wound around the winding portion 1 of both bobbins is connected to the binding end portion 6a of the terminal 6, thereby making the stepping A stator of the motor is configured.

According to the bobbin having the above configuration, the terminal 6 of the five terminal buried portion 5, as extension C ₁ to connection end 6b side of the respective axes intersect at one point P, tied Since the intermediate portion 6c between the end 6a and the connection end 6b is arranged radially, the interval between the adjacent connection ends 6b is smaller than the interval between the binding ends 6a.

  Thereby, even when the pitch of the connection end part 6b protruded so that it may form in a line from the outer peripheral surface 5a of the planting part 5 which faces in the direction of the axis C is set to a narrow pitch of 1.5 mm, for example. It is possible to secure a wider pitch of the binding end portion 6a protruding from the adjacent outer peripheral surface 5b of the portion 5. As a result, the end of the coil can be mechanically wound around the binding terminals 6a by using a binding device or the like without causing interference with the adjacent binding terminals 6a.

Further, when a plurality of terminals 6 are arranged so that the intermediate portions 6c thereof are radially arranged, as shown in FIG. 4, the tips of the adjacent connection end portions 6b are aligned at equal intervals. place manner, and as shown in FIG. 1, the tying end 6a, by placing on an arc centered at the intersection point P of the extension line C _1, as shown in this embodiment, 5 It is possible to use the same shape as the book terminal 6.

  Moreover, since the tips of the connection end portions 6b are positioned on a straight line at equal intervals, there is no hindrance to the connection with the external connection portion, and the binding end portion 6a is on the arc. Since it is arrange | positioned, without increasing the protrusion dimension of the outer peripheral surface 5a in the planting part 5, the space | interval with the adjacent binding end part 6a can be ensured still more widely.

DESCRIPTION OF SYMBOLS 1 Winding part 2 Flange 3 Terminal planting part 5 Planting part 5a One outer peripheral surface 5b Other outer peripheral surface 6 Terminal 6a Binding end part 6b Connection end part 6c Middle part C Axis C ₁ Extension line P Intersection

Claims (2)

A cylindrical winding portion in which a coil is wound between flanges formed at both ends, and a terminal planting portion integrally formed with the flange of the winding portion, the terminal planting portion including the above In the bobbin in which a plurality of terminals around which the end of the coil is wound are implanted,
The plurality of terminals protrude from the outer peripheral surface of one of the terminal planting portions in a row from the binding end portion around which the end portion of the coil is wound, and the connection end portion of the other end portion is Projecting so as to form a line from the other outer peripheral surface of the terminal planting portion, and an intermediate portion between the binding end portion and the connection end portion is an extension line of each axis to the connection end portion side The bobbin is characterized in that the interval between the adjacent connection end portions is set to be smaller than the interval between the binding end portions by arranging them radially.   The plurality of terminals are fixed to the terminal planting portion with the tips of the connection end portions positioned on a straight line at equal intervals and the binding end portions positioned on an arc. A bobbin characterized by that.

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