JP5800128B2 - Vibration-rotation conversion toy using flat shaft - Google Patents

Description

  The present invention relates to a vibration-rotation conversion toy called a crisp dragonfly or the like that facilitates the rotation of a rotating body and reliably controls the rotation direction.

  A conventional vibration-rotation conversion toy called a crisp dragonfly or a crisp propeller is a propeller-like rotating body that is pivotally supported by a nail or the like at the tip of a support rod, and the uneven groove of the support rod is rubbed with a rubbing rod. It is a toy that applies vibration to the shaft and rotates the rotating body.

  If the axis of the rotating body vibrates only in a single direction (for example, longitudinal vibration), the rotating body is difficult to rotate. Therefore, it is devised to apply vibration in other directions (for example, lateral vibration) so that the axis moves in an elliptical shape. There is a need to. For this reason, while pressing the side surface of the support rod with a finger having a rubbing rod, the rotation direction is changed by rubbing the concave and convex grooves of the support rod to facilitate rotation or changing the side surface to be pressed (Non-Patent Document 1). ).

  Instead of this finger operation, the rubbing bar is cut into a substantially L shape, and the upper and side of the concave and convex grooves of the support bar are simultaneously rubbed to give an elliptical motion to the shaft, or the rubbing bar is trapezoidal. There is a proposal to change the rotation direction by changing the side surface to be cut out and to contact (Patent Document 1).

  Also, there is a type in which the support rod has a rectangular cross section, and two corners of the concave and convex grooves on the upper surface thereof are rubbed with a rubbing rod to change the rotation direction of the rotating body.

  Furthermore, there is a proposal that an axis or a part thereof is an elastic body and moves in an elliptical shape when vibrated. (Patent Document 2)

Tomihei 8-3025464 Japanese Patent Laid-Open No. 15-2003210859

Sato, et al .: “Mechanism of“ vibration-rotation conversion toy ””, IEICE Technical Report 94 (390), 45-52, 1994.

  In the conventional vibration-rotation conversion toy, when the uneven groove of the support rod is rubbed with a rubbing rod and vibrated in a single direction, the shaft contacts and pushes the hole of the rotating body, but because of the round bar shape, it rotates. A force is applied to the body only in the normal direction, which is the vibration direction, and the rotating body does not rotate. For this reason, the operation and device as described above are added, the shaft is moved in an elliptical shape, and the rotating body is rotated by friction with the rotating body.

  Accordingly, to obtain a vibration-rotation conversion toy that can be easily and smoothly rotated including the direction of rotation and can be reliably controlled so as not to rotate without requiring the shaft to move in an elliptical shape. With the goal.

  For this reason, in this invention, the axis | shaft of the rotary body was made into the flat axis | shaft, and it was made for the vibration direction of a flat axis | shaft and the longitudinal direction of the vertical cross section of a flat axis | shaft to have inclination. When the flat shaft vibrates and touches the hole of the rotator and pushes the rotator, this tilt causes the rotator to receive and rotate. Hereinafter, it will be described in detail with reference to the drawings.

  FIG. 2 is a longitudinal sectional view showing an example of a flat shaft, (a) is a rectangular cross section, a flat shaft with a short side rounded so that it can be easily rotated, and (b) is an elliptical cross section. It is a flat axis. Further, it is shown that the longitudinal direction (2) of the flat shaft is inclined at an angle θ with respect to the vibration direction (1) of the flat shaft.

  FIG. 3 is a front view showing a cross section of the rotating body and the flat shaft. Since the play between the hole of the rotating body and the flat shaft and the influence of gravity on the rotating body are considered to be small, it is not considered. The flat shaft vibrates in the vertical direction, and the longitudinal direction of the longitudinal section is inclined with respect to the vibration direction by an angle θ. It is assumed that the flat shaft rises due to vibration, and the upper end of the flat shaft comes into contact with the hole portion of the rotating body at the point P and is pushed by the force F. At this time, since the straight line OP connecting the point P and the axial center point O substantially coincides with the longitudinal direction of the flat axis, if the inclination between the straight line OP and the vibration direction is θ, the force F is a component force in the tangential direction of the hole. Fsinθ and the component force Fcosθ in the normal direction. The former is a force for rotating the rotating body, and the latter is a frictional force between the flat shaft and the rotating body (μFcos θ when the friction coefficient is μ). When the flat shaft descends, the lower end pushes the hole of the rotating body, and the rotating body acts on the rotating body in the same direction as the upper end. When viewed from the front, the rotational direction of the rotating body is counterclockwise when the longitudinal inclination of the longitudinal section of the flat shaft is positive (FIG. 3), and clockwise when negative.

  When the inclination θ is small, the frictional force increases and the rotational force can be sufficiently transmitted to the rotating body, but the rotational force becomes small and does not rotate at 0 °. Further, when the inclination θ is large, the rotational force becomes large, but the frictional force is small, the shaft and the rotating body slip, and at 90 °, it does not rotate.

  In order for the rotating body to rotate easily and smoothly, the shape of the concave and convex grooves, the vibration mode depending on the pitch, the play between the flat shaft and the hole of the rotating body, the friction coefficient, etc. are related. The inclination of the longitudinal direction of the longitudinal section with respect to the vibration direction is determined by trial using a flat shaft or a rotating body material that is actually used, and considering the strength.

From the above description, the following effects can be obtained in the present invention.
(1) When the flat shaft vibrates and touches and pushes the hole of the rotating body, the rotating body receives a rotational force due to the inclination between the vibration direction and the longitudinal direction of the longitudinal section of the flat shaft. Rotates easily and smoothly.
(2) By changing the inclination between the vibration direction and the longitudinal direction of the longitudinal section of the flat shaft, it is possible to change the rotation direction of the rotating body or prevent it from rotating.
(3) A rotating body juxtaposed on a single support rod and a plurality of coaxial rotating bodies can be simultaneously rotated in opposite directions, which has been impossible in the past.

1 is a general perspective view showing an embodiment of the present invention. It is an example of the flat axis | shaft of this invention, and is a longitudinal cross-sectional view which shows the state inclined with respect to the vibration direction. It is the front view which shows the cross section of the rotary body of this invention, and a flat shaft, and is the figure explaining the principle which a rotary body rotates. It is a perspective view which shows Example 2 of this invention. It is a perspective view which shows Example 3 of this invention. It is a top view which shows Example 4 of this invention. It is a top view which shows Example 5 of this invention.

  To make the rotating body easier to rotate, change the direction of rotation, or prevent it from rotating, fix the vibration direction of the flat shaft and change the longitudinal inclination of the longitudinal section of the flat shaft, or fix the flat shaft Then there is a method of changing the vibration direction of the flat shaft. Embodiments of the present invention will be described below.

  FIG. 1 is a general perspective view showing an embodiment of the present invention, and has the same configuration as a conventional vibration-rotation conversion toy except for the flat shaft 4. An uneven groove 2 is attached to a part of the upper surface of the support bar 1. The rotating body 5 is a propeller, a disk or the like, and a hole 6 having a diameter slightly larger than the width of the flat shaft 4 is opened at the center thereof. It passes through the hole 6 of the rotating body in a state where the longitudinal direction of the longitudinal section of the flat shaft 4 is appropriately inclined with respect to the vibration (vertical) direction of the flat shaft, and is stopped at the tip of the support rod 1.

  The support rod 1 is grasped, and the uneven groove 2 is rubbed with the rubbing rod 3. At this time, it is not necessary to perform the operations performed with the conventional vibration-rotation conversion toy such as rubbing strongly, rubbing the corners of the concave / convex groove 2 or pushing the support rod 1 with a finger, and the concave / convex groove 2 is lightened with the rubbing rod 3 Just rub. The support rod 1 and the flat shaft 4 at the tip thereof vibrate up and down, and the flat shaft 4 touches and pushes the hole 6 of the rotating body, thereby rotating the rotating body 5 with a rotational force.

  If the flat shaft 4 can be rotated about the axial direction, and the vibration direction and the inclination in the longitudinal direction of the longitudinal section of the flat shaft 4 are changed, the rotating direction of the rotating body 5 can be changed or can not be rotated. .

  As shown in FIG. 4, the concave and convex groove 2- (1) is provided on the upper surface of the support bar 1 and the concave and convex groove 2- (2) is provided on the side surface. Set to 45 °. When rubbing the concave / convex groove 2- (1) on the top surface and rubbing the concave / convex groove 2- (2) on the side surface, the longitudinal inclination of the longitudinal section of the flat shaft 4 with respect to the vibration direction is reversed. Rotate in the opposite direction. Moreover, if the corner | angular part where the uneven | corrugated groove | channel 2- (1) and the uneven | corrugated groove | channel 2- (2) cross is rubbed, the rotary body 5 will not rotate.

  As shown in FIG. 5, the support rod 1 is formed in a columnar shape, and the concave and convex grooves 2 are attached over the entire circumference. When the support rod 1 is turned around its central axis and the circumferential position of the concave and convex groove 2 is changed, the inclination of the vibration direction of the flat shaft 4 and the longitudinal direction of the vertical cross section of the flat shaft 4 changes. The direction of rotation is changed or it does not turn.

  As shown in FIG. 6, the tip of the support rod 1 is branched, and the rotating body 5- (1) and the rotating body 5- (2) are juxtaposed. The longitudinal direction of the longitudinal section of the flat shaft 4- (1) is tilted moderately positive and stopped through the rotating body 5- (1), and the longitudinal direction of the longitudinal section of the flat shaft 4- (2) is tilted moderately negative. And stop through the rotating body 5- (2). When the concavo-convex groove 2 of the support bar 1 is rubbed and vibrated, the rotating body 5- (1) and the rotating body 5- (2) simultaneously rotate in the opposite directions.

  As shown in FIG. 7, the rotating body 5- (1) and the rotating body 5- (2) are passed coaxially. The longitudinal direction of the longitudinal section of the flat shaft 4- (1) that is the shaft portion of the rotator 5- (1) is moderately positively inclined, and the flat shaft 4- (2) that is the shaft portion of the rotator 5 (2). ) The longitudinal direction of the longitudinal section is moderately negatively inclined. When the concavo-convex groove 2 of the support bar 1 is rubbed and vibrated, the rotating body 5- (1) and the rotating body 5- (2) simultaneously rotate in the opposite directions.

  When the present invention is applied to the toy of Patent Document 2 and the inclined flat shaft 4 is used instead of the elastic shaft, the propeller can be easily and smoothly driven even in a single vertical vibration when the support is lowered. It can be turned.

DESCRIPTION OF SYMBOLS 1 Support rod 2 Concavity and convexity 3 Rub rod 4 Flat shaft 5 Rotating body 6 Hole of rotating body

Claims (1)

  In the vibration-rotation conversion toy that rotates the rotating body by rotating the rotating body by rubbing the uneven part provided on the supporting rod by supporting the rotating body with a round bar-shaped shaft at the tip of the supporting rod and supporting it. A vibration-to-rotation conversion toy that can reliably rotate the rotation body including the rotation direction or prevent the rotation body from rotating by using the axis of the rotation body as a flat shaft and vibrating the shaft.

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