Rock control device for rock body

Abstract

The present invention provided an oscillation control device for a rocker which achieves cost reduction and materializes desired oscillation without requiring complicated labor. A sensor part 14 is provided with a reflector 141 which is arranged in an oscillator and has a reflection-transmission pattern part 1411 over a predetermined range of substantially half in the rocking direction of the rocker, and one optical sensor 142 for outputting a pulse signal S142 in response to a light receiving level by receiving light reflected by the reflector 141. A control circuit 15 counts the continuous time when no waveform is produced and the change point on the basis of a pulse signal waveform by the optical sensor. The rocking amplitude is recognized through the count of a pulse signal for one period. When the time at which no waveform is produced continues for a prescribed time, the recognition of an off-time is made to determine the completion of one period. The circuit starts driving from next pulse. At the time of stopping rocking, fade-out control is executed in which the rocking amplitude is gradually lowered to be stopped in accordance with the degree of rocking amplitude to be set.

Description

technical field [0001] The present invention relates to a swing control device for controlling the swing of a swing body such as a cradle. Background technique [0002] In recent years, it goes without saying that there are appliances that allow infants to ride and move, and chairs for infants that can be used as cradles have also been put into practical use. [0003] Such a driving system for an infant chair includes a driving solenoid installed in the infant chair, a photodiode for detecting a center of swing, and the like. [0004] figure 1 This is a block diagram showing an exemplary configuration of a swing control device of a conventional chair drive system for infants and young children. [0005] The shaking control device 1 such as figure 1 As shown, it has: cradle 2, light sensor 3, timer 4 and solenoid drive circuit 5. [0006] In this rocking control device 1 , a cradle 2 on which an infant rides is rocked, for example, when passing through the rocking center,...

AI Technical Summary

Problems solved by technology

[0009] However, in the above-mentioned conventional rocking control device 1, although the rocking mode of the cradle 2 is different according to the weight of the infant to be seated, in other words, depending on the load, the detection signal of the photodiode 3 indicating that the rocking center is detected S3 drives the solenoid with a fixed drive pulse S4, so there is a problem that the expected shaking control cannot be performed due to changes in the swing range of the baby's weight in the cradle 2

[0010] In addition, since the solenoid is driven with a fixed drive pulse S4, there is a problem that only monotonous shaking can be achieved.

[0013] However, in the above-mentioned conventional swing control device 1, even if there are infants with different weights, because of the advantage that the drive control can be reliably performed according to the load, the cost increases by using a plurality of optical sensors. , the difference between the relative sensitivities of the two sensors affects the performance, so it is necessary to screen and use the parts, the problem is that it takes time to trouble

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