JPH09196964A - Pendulum of servo accelerometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pendulum in which the working man-hour is reduced and whose yield is enhanced by a configuration wherein the central flange part of a torque coil in which a first coil and a second coil are formed on an integrated bobbin provided with three flange parts is passed through and fixed to a mounting hole in the center of a pendulum piece. SOLUTION: A torque coil 20 is constituted in such a way that respective bobbins in conventional cases are integrated as an integrated bobbin 30 comprising one pair of flange parts 21a, 21b on both sides of a central flange part 21 in the center, and it is provided with a first coil 6 and with a second coil 8. The outer circumferential face of the central flange part 21 is fitted to the inner circumferential face of a mounting hole 5, and the pendulum piece 1 is constituted so as to be bent with reference to a base part 3 via a hinge part 4. When an acceleration is applied along an input axis, the pendulum piece 1 which is supported by the hinge part 4 is displaced. Its displacement is detected by a pick-off means, it is amplified by a servoamplifier, it is applied to either the coil 6 or the coil 8, and a torque is generated. The pendulum piece 1 is controlled in such a way that its displacement due to the torque becomes zero, a current which flows in the coil 20 at this time is read out, and the magnitude of the input acceleration can be detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pendulum of a servo accelerometer, and more particularly to a novel improvement for easily and surely attaching a bobbin of a torquer coil to a pendulum piece of a pendulum by using one integral bobbin. .

[0002]

2. Description of the Related Art As a pendulum of a conventional servo accelerometer,
Generally, the structures shown in FIGS. 3, 4 and 5 and 6 have been adopted. That is, the reference numeral 1 in FIG. 3 is a pendulum piece of the pendulum 2, and the pendulum piece 1 is bent with respect to the base portion 3 via the hinge portion 4 in the direction of arrow A and is displaced. Has been done. A first bobbin 7 having a first coil 6 along a hole 5 formed in the center of the pendulum piece 1.
And a second bobbin 9 having a second coil 8 is adhered and fixed to face each other, and the pendulum piece 1 is sandwiched by the bobbins 7 and 8. Therefore, when the pendulum 2 configured as shown in FIG. 4 is used by mounting it on a well-known servo accelerometer (not shown), when an acceleration is applied along the input shaft, the coil portion 4
The pendulum piece 1 supported by is deviated, and the deviation is detected by a pick-off coil (not shown), amplified by a servo amplifier, and applied to the coils 6 and 8 which are torquer coils to generate torque. The torque controls the deviation of the pendulum piece 1 to zero, and the magnitude of the input acceleration can be detected by reading the current flowing through the torquer coil at this time. Further, as another conventional example, a configuration in which the bobbin 9 is provided only on one side as shown in FIGS. 5 and 6 has been proposed.

[0003]

Since the pendulum of the conventional servo accelerometer is constructed as described above, there are the following problems. That is, in the case of FIG. 3 and FIG.
The Toruca coil must consist of a coil wound around a pair of bobbins, and each bobbin must be attached to both sides of the pendulum piece.
The workability was extremely poor because the sticking was performed with the centers aligned, and the number of parts was large, resulting in an increase in the number of assembly steps and a decrease in work efficiency. Further, in the cases of FIGS. 5 and 6, the weight balance was poor and the performance was degraded.

The present invention has been made to solve the above problems, and particularly, by using one integral bobbin, the bobbin of the torquer coil can be easily and surely attached to the pendulum piece of the pendulum. It is intended to provide a pendulum for a servo accelerometer.

[0005]

In the pendulum of a servo accelerometer according to the present invention, a pendulum piece is displaced from a hinge portion when an acceleration is applied, and the pendulum piece is generated by a current applied to a torquer coil provided on the pendulum piece. In the pendulum of the servo accelerometer in which the deviation of the
The first and second coils are provided on an integral bobbin having one collar portion, and the central collar portion located at the center of the three collar portions is fixed by penetrating into a mounting hole formed at the center of the pendulum piece. It is a configuration.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the pendulum of a servo accelerometer according to the present invention will be described in detail below with reference to the drawings. The same or equivalent parts as those of the conventional example will be described using the same reference numerals. Reference numeral 1 in FIGS. 1 and 2
Is a pendulum piece of the pendulum 2, and the pendulum piece 1 is configured to be bent and displaced in the arrow A direction with respect to the base portion 3 via the hinge portion 4.

Next, the reference numeral 20 in FIG. 1 is a Toruca coil. This Toruca coil 20 integrates the conventional bobbins 7 and 9 and has a central collar portion 2 at the center thereof.
1 and a pair of collar portions 21a and 21b on both sides thereof.
And a first bobbin 30 having
It has second coils 6 and 8. This ToruCa coil 20
Is formed in the center of the pendulum piece 1 and is fitted into the mounting hole 5 having an inner diameter which is substantially the same as the outer diameter of the central flange portion 21 and into which the central flange portion 21 can be fitted. The surface and the inner peripheral surface of the mounting hole 5 are fitted together, and the pendulum piece 1 is configured to bend with respect to the base portion 3 via the hinge portion 4.

Next, the operation will be described. First, the pendulum 2 shown in FIG. 2 is attached to a known servo accelerometer (not shown), and when acceleration is applied along the input shaft, the pendulum piece 1 supported by the hinge portion 4 is displaced, and this displacement is It is detected by a well-known pick-off means (not shown) (coil or electrostatic capacitance type), amplified by a servo amplifier, and applied to any of the coils 6 and 8 which are the torquer coil 2 to generate torque. The torque controls the deviation of the pendulum piece 1 to zero, and the magnitude of the input acceleration can be detected by reading the current flowing through the torquer coil 2 at this time.

[0009]

The pendulum of the servo accelerometer according to the present invention is
With the above configuration, the following effects can be obtained. That is, since the bobbin of the Toruca coil is integrally formed and the central collar portion of the bobbin is fitted in the mounting hole of the pendulum piece, it is extremely easy and easy to mount and fix the bobbin to the pendulum piece. The axes can be matched. It is possible to obtain a reduction in work steps and an improvement in yield.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a pendulum of a servo accelerometer according to the present invention.

FIG. 2 is a perspective view after assembly of FIG.

FIG. 3 is an exploded perspective view showing a pendulum of a conventional servo accelerometer.

FIG. 4 is a perspective view after assembly of FIG.

FIG. 5 is an exploded perspective view showing another conventional example.

FIG. 6 is a perspective view after the assembly of FIG.

[Explanation of symbols]

 1 Pendulum piece 4 Hinge part 5 Mounting hole 20 Toruca coil 21 Central collar part 21a, 21b Collar part

Claims (1)

[Claims] 1. A pendulum piece (1) is displaced from a hinge part (4) when acceleration is applied, and the pendulum piece (1) is caused by a current applied to a torquer coil (20) provided in the pendulum piece (1). In the pendulum of the servo accelerometer in which the deviation of () is set to zero, the torquer coil (20) has first and second coils on an integral bobbin (30) having three collars (21, 21a, 21b). A mounting hole (5) formed in the center of the pendulum piece (1) with a central collar portion (21) provided as 6, 8 and located at the center of the three collar portions (21, 21a, 21b).
A pendulum for a servo accelerometer, which is characterized by being penetrated through and fixed to.