JPH0335597Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the up-down mechanism of a recording pen used in an X-Y plotter or the like.

Conventionally, flapper type solenoids have often been used in this type of up-down mechanism. This uses the magnetic force of a solenoid to attract the flapper to which the recording pen or pen arm is attached, thereby raising and lowering the recording pen. Now, in such an up-down mechanism, the recording pen moves in conjunction with the suction or return of the flapper and comes into contact with the recording paper, etc., so a large impact is applied to the pen tip, which may damage the pen tip. Contact between the flap and the solenoid may cause abnormal noise. Therefore, in order to solve this problem, a damper has been installed in the solenoid part, and mechanical air dampers installed in the pen arm and electric dampers that apply negative feedback to the solenoid have been put into practical use. ing. However, although such a damper can protect the pen tip, it cannot eliminate the noise caused by the solenoid, and has the disadvantage that it is complicated in structure and becomes an expensive device.

The present invention eliminates the above-mentioned drawbacks of the conventional device, protects the pen tip from the impact of up-down, and has a simple structure for the up-down mechanism of the recording pen that does not generate abnormal noise due to contact between the solenoid and the flapper. The aim is to realize this by

The up-down mechanism of the recording pen of the present invention is such that a damper consisting of a piston and a cylinder is attached to the flapper via a flexible joint made of rubber or the like. This was realized by

The up-down mechanism of the recording pen of the present invention will be explained below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the up-down mechanism of the recording pen of the present invention. In the figure, 1
2 is a recording pen, 2 is a pen arm that holds recording pen 1, 3 is a carriage that moves recording pen 1, and 4
5 is a solenoid, 5 is a flapper, and 6 is a damper attached to the flapper 5. The flapper 5 supports the pen arm 2, and by sucking the flapper 5 with the solenoid 4, the pen arm 2 can be pulled down and the recording pen 1 can be brought down to the recording state. Here, the damper 6 is the flapper 5
It applies braking to the movement of the recording pen 1, prevents it from strongly hitting the recording surface, protects the pen tip, and
This is to reduce the occurrence of abnormal noise due to contact between the solenoid 4 and flapper 5.

FIG. 2 is a sectional view showing details of the damper portion in FIG. 1. In the figure, the same parts as in FIG. 1 are designated by the same reference numerals. 7 is a spring for returning the flapper 5, 8 is a board for the solenoid 4,
9 is a flexible joint made of an elastic body such as rubber and attaches the damper 6 between the flapper 5 and the substrate 8; 61 is a piston constituting the damper 6; and 62 is a cylinder. piston 61
and cylinder 62 are connected to flapper 5 and base plate 8 via flexible joints 9, respectively, and grease is applied to the outer surface of the piston and the inner surface of the cylinder.

In the damper portion configured in this manner, when the flapper 5 is attracted by the solenoid 4, a compressive force is applied to the damper 6 via the flexible joint 9. At this time, the damper 6 relieves the movement of the flapper 5 by its damping action, so that the pen arm and the recording pen gradually descend to reach the recording state. Therefore, an excessive impact is not applied to the nib of the recording pen, which protects the nib, and also prevents the flapper 5 from hitting the solenoid 4 with force and causing abnormal noise. You can also. Also,
When the suction force of the solenoid 4 is cut off, the flapper 5 attempts to return to its original position due to the force of the spring 7, but the damper 6 also acts here to ease the return movement of the flapper 5. Therefore, the pen arm and the recording pen also gradually rise from the recording state and transition to the non-recording state.

Here, during the up-down operation, the flapper 5 rotates about the engagement portion 51 with the substrate 8 as a fulcrum, but since the damper 6 is connected to the flapper 5 via a flexible joint 9, The rotational motion of the flapper 5 can be converted into a linear motion by the flexible joint 9, and damping can be applied to the flapper 5 using only a simple linear motion damper 6.

As explained above, in the up-down mechanism of the recording pen of the present invention, a damper consisting of a piston and a cylinder is attached to the flapper through a flexible joint made of rubber or the like, so that damping of the flapper that rotates can be prevented. To realize a recording pen up-down mechanism with a simple configuration that can be performed using a simple linear motion damper, protects the pen tip from up-down shock, and does not generate abnormal noise due to contact between the solenoid and flapper. be able to.

[Brief explanation of drawings]

FIGS. 1 and 2 are block diagrams showing one embodiment of the up-down mechanism of the recording pen of the present invention. 1... Recording pen, 2... Pen arm, 3... Carriage, 4... Solenoid, 5... Flutter,
6... Damper, 61... Piston, 62... Cylinder, 7... Spring, 8... Board, 9... Flexible joint.

Claims (1)

[Scope of utility model registration request] A recording pen comprising a solenoid, a flapper to which a recording pen or pen arm is attached and which is sucked up and down by the solenoid, a damper, and a flexible joint made of an elastic body such as rubber and connecting the damper to the flapper. up-down mechanism.