JPS5917019Y2 - Slider drive device using electromagnetic plunger - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sliding body drive device using an electromagnetic plunger.
It is especially suitable for switching the vertical position of the head and the stereo amplifier system in connection with switching the tape running direction of a tape recorder.

Generally, this kind of sliding body drive device using an electromagnetic plunger includes an electromagnetic plunger, a traction rod rotatably attached to the operating rod of the electromagnetic plunger, and a traction rod that is moved in a direction opposite to the direction of traction by the electromagnetic plunger. The first
a cam rotatably attached to the base plate and having a generally convex edge; and a cam provided on the traction rod so as to be able to abut against the edge of the cam. With a protrusion,
A sliding body that is slid by the rotation of the cam is known, the cam is rotated by the electromagnetic plunger via the traction rod, and the sliding body is slid by the rotation. There is.

In such a sliding body driving device using an electromagnetic plunger, the sliding position of the sliding body is held by a toggle spring or the like, so the electromagnetic plunger resists not only the force that causes the sliding body to slide but also the toggle spring. Since it requires force, it has the disadvantage of requiring the use of a large electromagnetic plunger.

The present invention eliminates the above drawbacks and makes it possible to maintain the sliding position of the sliding body even when using a small electromagnetic plunger.As shown in the figure, the electromagnetic plunger 1 and the operating rod 2 of the electromagnetic plunger are A first elastic member consisting of a spring 5 that biases the traction rod 4 in a direction opposite to the direction of traction by the electromagnetic plunger 1; a cam 8 which is rotatably mounted around a fulcrum 6 relative to the cam (not shown) and has a generally convex edge 7; a protrusion 9 provided on the cam 8; a sliding body 10 that slides as the cam 8 rotates; A movable member composed of pins 11 and 12, a second elastic member composed of a spring 13 that biases these movable members in the above-mentioned sandwiching direction, and a serrated edge of the movable member provided on the sliding body 10. 14 and 15, and the corresponding contact portion and the movable member prevent the sliding body 10 from sliding in one direction when the movable member is in contact with the abutment portion. The blocking means prevents the sliding body 10 from sliding in a direction opposite to the sliding direction when the sliding body 10 has finished sliding, and further, the electromagnetic plunger 1 is actuated to stop the traction rod. 4 is moved against the first elastic member, and as a result of this movement, the first protrusion 6 is guided along the edge 7 of the cam 8 and rotated by the traction rod 4, which moves the movable member. is moved against the second elastic member, and this movement releases the blocking of the sliding body by the blocking means.

The movable member is composed of pins 11 and 12 respectively implanted in arms 18 and 19 that are rotatably attached to the base plate with 16 and 17 as a fulcrum.
An inclined edge inclined with respect to the sliding direction of the sliding body and a vertical edge in a perpendicular direction are formed at the abutting portion of the sliding body, and these inclined edges and vertical edges form the serrated edge 14.15. These serrations 14.15 and the pins 11°1
2 constitute the above-mentioned blocking means.

Reference numeral 20 denotes an arm, which is rotatably attached to the substrate with 21 as a fulcrum.

Elongated holes 22.23 are bored in this arm, and pins 24.25 implanted in the sliding body 10 and the cam 8 are fitted into these elongated holes 22.23, respectively.

Further, the tip of the arm 20 is fitted into a hole 27 of another sliding body 26.

Reference numeral 28 denotes a guide pin provided on the substrate, which is fitted into the elongated hole 29 of the sliding body 10.

In the sliding body driving device using the electromagnetic plunger described above, when the electromagnetic plunger 1 is actuated in the state shown in FIG. 7.

Further, the projection 9 is guided by the edge 7 of the cam 8, and the traction rod 4 is rotated about the fulcrum 3 by the guidance, and the pin 12 is caused to resist the spring 13 by the traction rod 4 due to this rotation. This rotation causes the pin 12 to move away from the serrated edge 15 so that the slider 10 can slide to the right, and the operation of the electromagnetic plunger 1 causes the protrusion 9 to move away from the edge of the cam 8. By pressing the portion 7, the cam 8 is rotated, and this rotation causes the sliding body 10 via the arm 20 to slide to the right, and the sliding body 26 to the left, resulting in the state shown in FIG. becomes.

In this state, the serrated edge 14 and the pin 11 prevent the sliding body 10 from sliding to the left.

When the excitation current of the electromagnetic plunger 1 is cut off in the state shown in FIG. 2, the traction rod 4 is returned by the spring 5 to the position before movement as shown in FIG.

When the electromagnetic plunger 1 is energized in the state shown in FIG.
is pressed against the spring 13, and as a result of this pressing, the sliding prevention of the sliding body 10 by the pin 11 and the serrated edge 14 is released.

When the traction rod 4 is moved against the spring 5, the cam 8 is rotated by the protrusion 9 to the position shown in FIG.
The sliding rods 10.26 are each slid via the arms 20.

When the excitation current of the electromagnetic plunger 1 is cut off, the traction rod 4 is returned to its previous position by the spring 5, as shown in FIG.

The present invention includes the pins 11, 12 and the serrated edges 14, 15.
This prevents the sliding body 10 from sliding, and the rotation of the traction rod 4 releases this inhibition, so that the sliding body 10 can be operated satisfactorily even if the force for driving it is small.

Note that the slide bodies 10.26 slide in opposite directions to each other to operate appropriate operated members.

BRIEF DESCRIPTION OF THE DRAWINGS The figure is a plan view showing an embodiment of the present invention, and FIGS. 1 to 4 show different operating states. 1: Electromagnetic plunger, 2: Operating rod, 4: Traction rod, 5: Spring, 7: Edge, 8: Cam, 9: Projection, 10: Sliding body, 13: Spring.

Claims (1)

[Claims for Utility Model Registration] 1. An electromagnetic plunger, a traction rod rotatably attached to the operating rod of the electromagnetic plunger, and a second actuator that urges the traction rod in a direction opposite to the direction of traction by the electromagnetic plunger. a cam rotatably attached to the base plate and having a generally convex edge; and a cam provided on the traction rod so as to be able to come into contact with the edge of the cam. a protrusion, a sliding body that slides as the cam rotates, two movable members arranged to sandwich the traction rod in a direction substantially perpendicular to the direction in which the traction rod is moved by the traction; and these movable members. a second elastic member that biases the movable member in the sandwiching direction; a contact portion of the movable member provided on the sliding body; and the movable member and the movable member and a blocking means for blocking the sliding body from sliding in one direction when the sliding body is in contact with the sliding body, and when the sliding body is finished sliding by the blocking means, the sliding body is prevented from sliding in the opposite direction to the sliding direction. the traction rod is moved against the first elastic member by actuation of the electromagnetic plunger, and the projection is guided along the edge of the cam by the movement; The movable member is moved against the second elastic member by the traction rod rotated by the electromagnetic plunger, and this movement releases the blocking means from blocking the sliding body. Moving body drive device. 2. The movable member is composed of pins implanted in arms that are rotatably attached to the board, and the contact portion of the sliding body has an inclined edge that is inclined with respect to the sliding direction of the sliding body. , a vertical edge in a vertical direction, and the pin is in contact with the vertical edge to prevent the sliding body from sliding. Device.