JPS6294161A - Vibrator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vibrator mounted on a vehicle seat or the like.

(Prior Art) In vehicle seats and the like, for example, vibration is applied to a ramper plate that supports the lumbar region of an occupant to form a vibrator.

Conventionally, an N magnet, for example, has been used as an excitation device for such a vibrator.

(Problem to be solved by the invention) However, with the excitation structure using electromagnets, there is a large amount of excitation! & Even if a current is applied, it is difficult to obtain such a large excitation force, so miniaturization,
It has drawbacks such as difficult accounting and high costs.

The present invention was made in view of the above problems, and its purpose is to obtain a large excitation force with a relatively small amount of VT power consumption, and to
The goal is to create a vibrator that is small, lightweight, and low in cost.

(Means for Solving the Problems) The present invention solves the above-mentioned problems by driving a motor having an unbalanced weight attached to its output shaft.
This method is characterized by using a pulse signal whose pulse period is variable and whose pulse width is limited to a substantially constant value.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partial sectional view showing one embodiment of the present invention, and FIGS. 2 and 3 are configuration diagrams of main parts. In these figures, 1
is the seat cushion, and 2 is the seat back. A ramper plate 3 is disposed inside the seat back 2 so as to be movable in the front-rear direction. 4 is the lumbar plate 3
A control lever 5 for moving the control lever in the front-back direction is a seat back frame, and a shaft 6 having one end fixed to the control lever 4 is rotatably passed through the seat back frame 5. 7 is a bracket fixed to the seat back frame 5. The bracket 7 is bent into a substantially U-shape, and an arm spring 8 is inserted between the bent portions.
A hinge bin 9 is erected to horizontally rotate. One end of the arm spring 8 is fitted into a spiral cam hole of a cam 10 that rotates integrally with the shaft 6, and the other end is rotatably locked to the lumbar plate 3 via a support portion 3a. Furthermore, the output shaft 1 is attached to the lumbar plate 3.
A DC motor 13 (see FIG. 3) to which an unbalanced weight 12 is fixed is fixed using a metal fitting 14. 15 is a control unit for controlling the rotation of the motor 13;
16 is a battery.

In such a configuration, by rotating the operating lever 4, the arm spring 8 can be horizontally rotated, and the lumbar plate 3 can be adjusted steplessly in the longitudinal direction. On the other hand, when the motor 13 is driven to rotate with the ramper brake [3] adjusted to an arbitrary position, the unbalanced weight 12 is fixed to the output shaft 11 of the motor 13, so the motor 13 is The vibration of the motor 13 is transmitted to the lumbar plate 3 and excites the lumbar plate 3. That is, by rotating the motor 13, the lumbar plate 3 operates as a vibrator.

FIG. 4 is a block diagram showing a specific example of the control section 15 shown in FIG. In Fig. 4, -17 has a CR starting circuit, and depending on the vA setting of the variable resistor R+, for example, 1 second to 1/6
A pulse signal as shown in FIG. 5 is generated with an arbitrary period T of 0 seconds. 18 is a pulse width limiting circuit;
In response to the pulse signal output from the CRR oscillator circuit 17, the maximum value of the pulse width W at the on level (level when energizing the motor 13) is limited as shown in FIG. 6 according to the adjustment of the variable resistor 3R2. Outputs a pulse signal.

In Fig. 6, the characteristics of the portion where the period T exceeds To (pulse width Wo at this time) are flat as between points A and B, and sloped as between points A and C. However, any type of material with similar characteristics may be used. Pulse width limiting circuit 1
Limit starting value WO of the pulse width W of the pulse signal passing through 8
Therefore, it is desirable that the motor 13 has a period of time for at least one or two revolutions.When a certain period of time has elapsed after the vibrator is turned on, the output pulse signal of the pulse width limiting circuit 18 is turned off and the motor is turned off. This is an off-timer circuit that stops the rotational drive of the variable resistor R.
According to the adjustment in step 3, the time (for example, up to 15 minutes) until the pulse signal transmission is turned off is set. 20 is a power circuit (M force amplification circuit) that amplifies the power of the pulse signal applied from the pulse width limiting circuit 18 and drives the motor 13.

According to the control unit 15, the period T of the pulse signal is arbitrarily adjusted by the variable resistor R1, and the pulse width W is set to a constant value Wo or Wo when the period T exceeds To, depending on the setting of the variable resistor R2. By changing the period T of this pulse signal, the rotational speed of the motor 13, in other words, the vibration period of the lumbar plate 3 can be arbitrarily set.

With the above configuration, a current at the optimum level (constant level) for the drive torque can always flow through the motor 13, so compared to the conventional structure using electromagnets,
Although it is small and lightweight, a relatively large excitation force can be obtained. Furthermore, the structure is simple and costs can be reduced.

In addition, the CRR oscillation circuit 17. As the individual circuits of the pulse width limiting circuit 18 DEG off-timer circuit 19 and the power circuit 20, various types of circuits have been known. The above practical example may be connected using any of these methods.

For example, as 84rfc of the pulse width limiting circuit 18,
Connect an integrating capacitor to a constant voltage source via resistor R2,
Both ends of this integrating capacitor are short-circuited with a switching transistor, and when the input pulse signal rises, the output pulse signal rises, and in synchronization with this, the short-circuit between both ends of the integrating capacitor is released to start charging.
When the charging voltage becomes constant and reaches a predetermined level depending on the level or cycle, there is a configuration in which the output pulse is set to a low level and both ends of the integrating capacitor are short-circuited again.

Further, each of the above-mentioned circuits of the control section 15 may be configured using, for example, an IC (semiconductor integrated circuit), or may be configured by combining discrete circuit components.

Furthermore, the present invention is applicable not only to vibrators that apply vibration to the m-phase portion, but also to various types of vibrators.

(Effects of the Invention) As explained above, according to the present invention, a motor having an unbalanced weight fixed to the output shaft is driven using a pulse signal whose period is variable and whose pulse width is limited to a substantially constant value. Because it uses a small amount of power, it can provide a large amount of added power even with low power consumption, making it possible to realize a compact, lightweight, and low-cost image capture system.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view showing one embodiment of the present invention, Fig. 2 is a main part configuration diagram, Fig. 3 is a specific example of the motor, and Fig. 4 is a diagram of the second embodiment of the present invention.
FIG. 5 is a block diagram showing a specific example of the control section in the figure, FIG. 5 is a waveform example diagram of a pulse signal, and FIG. 6 is an explanatory diagram of pulse width limiting operation. 3... Ramper plate 13... Motor (with unbalanced weight) 14.
...Metal fittings 15...Control unit 16...Battery 17...CR generation note circuit 18...Pulse width limiting circuit 19...Off timer circuit 20...Power circuit patent applicant Shiraki Metal Industry Co., Ltd. Company agent Patent attorney Fuji Ijima 1 name square seal outside the jurisdiction 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A vibrator characterized in that a motor having an unbalanced weight attached to an output shaft is driven using a pulse signal with a variable pulse period and a pulse width limited to a substantially constant value.