JP5481638B2 - Bobbin structure for linear differential transformer - Google Patents

Description

  The present invention relates to a bobbin structure for a linear type differential transformer, and in particular, it is lightweight and inexpensive by directly winding a bobbin made of an insulating resin and fixing an end plate having a terminal pin on one end side of the bobbin. The present invention relates to a new improvement for obtaining a simple bobbin structure.

As a bobbin structure for a linear differential transformer of this type that has been conventionally used, for example, a configuration disclosed in Patent Document 1 and the like can be cited, but a probe portion in a bobbin 1 having a winding 2 is used. 7 is provided with a rod-shaped core 6 and a core tip guide 5 is provided at the tip of the core 6 so that the probe 7 is slid in the direction of the arrow A and wound around the outer periphery of the bobbin 1. The linear position can be detected by 2.
Although not shown, an end plate is bonded and fixed to the upper surface of the winding 2 via a potting agent, and a plurality of terminal pins are insert-molded on the end plate.

Japanese Patent Laid-Open No. 10-311737

Since the conventional linear differential transformer is configured as described above, the following problems exist.
That is, the bobbin of the linear differential transformer having the conventional configuration is manufactured by winding an insulating tube around an outer diameter of a metal pipe and bonding an end plate with a potting agent on the tube, and thus is made of a metal pipe. Since a bobbin, an insulating tube, and two end plates are required, and a four-point configuration is required, assembling requires a large number of processing steps, and it is difficult to reduce costs and reduce weight.
In addition, a probe that slides in a bobbin made of a metal pipe needs to be fitted with a cap made of a wear-resistant material at its tip, which is a load in assembly.

Linear differential transformers bobbin structure according to the present invention includes a cylindrical bobbin made of an insulating resin, and directly wound windings on the outer periphery of the bobbin, the bobbin and one body forming the end portion of the bobbin first and second end plates, along the outer periphery of the through-to Rutotomoni the bobbin along the second end plate is held in the first end plate in the axial direction by a predetermined disposed at a distance from one another are the terminal pins of the multiple arranged in each angle, the formed in each terminal pin and a projecting pin portion extending along a radial direction of the bobbin, the respective terminal pins on the respective end plates insert molded, wherein the projecting pin portions exposed to the outside at the respective end plates, wherein the respective projecting pin portions in a straight-linear differential transformers bobbin structure end lines that have been entwined of the winding The base of each terminal pin is a through hole formed at the center of the first end plate. Disposed in one piece by insert molding on the surface, the respective terminal pins of the second end in the plate is a structure that is bent toward the outer peripheral side of the second end plate.

Since the bobbin structure for a linear differential transformer according to the present invention is configured as described above, the following effects can be obtained.
That is, a cylindrical bobbin made of an insulating resin, a winding wound directly on the outer periphery of the bobbin, and first and second integrally formed at the end of the bobbin and spaced apart from each other An end plate, a plurality of terminal pins that are held by the first end plate and penetrate the second end plate along the axial direction, and a protrusion that is formed on each terminal pin and extends along the radial direction of the bobbin Each terminal pin is insert-molded on each end plate, each projecting pin portion is exposed to the outside between each end plate, and each projecting pin portion has an end of the winding. in linear differential transformers bobbin structure lines that have been tied, the base of the respective terminal pins are arranged in one piece by insert molding on the inner surface of the first end plate around the through hole formed in The terminal pins in the second end plate are connected to the second end plate. More configuration toward the outer peripheral side is bent, the end plates and the terminal pin or the like provided in the bobbin can be constituted by integrally insert molding, to achieve low cost, high reliability, lightweight that Can do.
In addition, the insulation between the winding and the bobbin is unnecessary, and the wear-resistant structure of the probe is unnecessary. Moreover, weight reduction is attained by using the same resin material as a bobbin for a probe.
Further, the first end plate is formed in a ring shape, and the second end plate is formed of a solid plate member, whereby each terminal pin passes through the second end plate and the first end plate. It is inserted into the inner edge of the through-hole and can be firmly fixed.

It is sectional drawing which shows the bobbin structure for linear type differential transformers by this invention. It is sectional drawing which shows a part of conventional linear type differential transformer.

  The present invention provides a bobbin structure for a linear differential transformer that is lightweight and inexpensive by directly winding a bobbin made of an insulating resin and fixing an end plate having a terminal pin on one end side of the bobbin. For the purpose.

A preferred embodiment of a bobbin structure for a linear differential transformer according to the present invention will be described below with reference to the drawings.
The same reference numerals are used for the same or equivalent parts as in the conventional example.
In FIG. 1, what is indicated by reference numeral 1 is a cylindrical bobbin made of an insulating resin. On the outer periphery 1a of this bobbin 1, there are a winding 2 made of known excitation and output for an insulating tube or the like. It is wound directly without going through.

A first end plate 10 having a ring shape is formed on one end 1 b of the bobbin 1 by integral molding with the bobbin 1.
On the end 1b side, a second end plate 11 is formed integrally with the bobbin 1 so as to be spaced apart from the first end plate 10 along the axial direction B.

  Each of the end plates 10 and 11 is formed by integral molding with the bobbin 1, the second end plate 11 is formed of a solid plate member, and a well-known insert molding is formed in the first end plate 10. A plurality of (for example, six) terminal pins 12 are arranged at predetermined angles along the outer periphery of the bobbin 1, and each terminal pin 12 is arranged along the axial direction B of the bobbin 1 with the second end plate. 11 is formed so as to penetrate 11.

The base portion 12a of each terminal pin 12 is integrally disposed on the inner surface of a through hole 13 formed at the center of the first end plate 10 by insert molding.
Accordingly, each terminal pin 12 is disposed integrally with each end plate 10, 11 integrally formed with the bobbin 1 by insert molding and straddling between the end plates 10, 11. That is, each end plate 10, 11 that are integrally connected shape by the terminal pins 12 by insert molding. Each terminal pin 12 in the second end plate 11 is bent toward the outer periphery 11 a of the second end plate 11.

A projecting pin portion 14 projecting outward along the radial direction C of the bobbin 1 is formed at a substantially central position of each terminal pin 12, and each projecting pin 14 has a gap 15 between the end plates 10 and 11. Is exposed to the outside.
Although not shown, each projecting pin portion 14 has an end line of the winding 2 tangled.

  Accordingly, the bobbin structure according to the present invention includes the bobbin 1, the first and second end plates 10, 11 integrally formed on the end 1 b side of the bobbin 1, and the terminals insert-molded on the end plates 10, 11. Therefore, the bobbin structure itself is configured as a single part made of a single integrally formed body. Compared to a conventional structure in which a plurality of independent parts are assembled, a single part of the bobbin structure is formed. It can be a unified bobbin structure.

  The bobbin structure for a linear differential transformer according to the present invention can be used in various fields such as aircraft, robot, machine tool, and space equipment.

1 Bobbin 1a Outer circumference 1b End B Axial direction C Radial direction 2 Winding 10 First end plate 11 Second end plate
11a outer periphery 12 terminal pin 12a base 13 through hole 14 protruding pin 15 gap

Claims (1)

A cylindrical bobbin (1) made of an insulating resin, a winding (2) wound directly on the outer periphery of the bobbin (1), and the bobbin (1) on the end (1b) of the bobbin (1 ) a first, second end plate (10, 11), said first end plate (10) is held in the second end plate (11) axis) and disposed at an body molded intervals the direction outer peripheral terminal pin (12) of the multiple arranged at predetermined angle along the Rutotomoni the bobbin to penetrate along the (B) (1), wherein formed in each of the terminal pins (12) wherein A projecting pin portion (14) extending along the radial direction (C) of the bobbin (1), and
Each terminal pin (12) is insert-molded to each end plate (10, 11), each projecting pin portion (14) is exposed to the outside between each end plate (10, 11), and each projecting in straight linear differential transformers bobbin structure end lines that have been entwined in the windings on the pin portion (14) (2), the base (12a) of the terminal pins (12), said first The terminal plate (12) in the second end plate (11) is integrally formed on the inner surface of the through hole (13) formed in the center of the end plate (10) by insert molding. A bobbin structure for a linear differential transformer, which is bent toward the outer periphery (11a) side of the two end plates (11).

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