JPS5945199A - Upper and lower mechanism of pen - 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] The present invention relates to a movable line Φ ring type vertical mechanism used in an X-Y plotter, etc., and particularly to a configuration in which a leaf spring is used to support a pen holder and also serve as a lead wire for a drive line wheel. It is.

The movable linear pen up-and-down mechanism used in X-Y plotters and the like has the advantage of short operating time and soft landing control, which generates little noise.

On the other hand, supporting a pen holder that accommodates a pen and moves up and down has the disadvantage that it requires high precision installation.
FIG. 1 shows an example of this type of conventional structure. (a) in the same figure
is an external view, and (b) is a vertical cross-sectional view of the front.

When a control current is passed in the positive or negative direction through the drive wire placed in the magnetic gap of the permanent magnet magnetic circuit 3, acceleration or deceleration force is applied to the wire in the vertical direction.

As a result, the pen holder moves upward or downward at high speed, and reaches a predetermined position at zero speed. In other words, it is possible to make a soft landing. Furthermore, by passing a writing pressure current through the wire, it is possible to apply appropriate writing pressure to the pen. In this case, the upper ball bearing ≠ guides the pen holder 2 in the vertical direction, and is installed together with the lower linear ball bearing j to prevent the pen holder 2 from wobbling laterally. The coil spring t is used to hold the pen holder in the recovery position when the current is cut off.This installation requires high precision installation of the upper and lower ball bearings ≠ and j that make up the mechanism. A coil spring B was needed to provide upward force. Further, since the lead wire of the drive wire wheel l moves, there is a drawback that wire breakage is likely to occur.

The present invention aims to eliminate such drawbacks, and uses two metal plate springs, eliminates ball bearings that require precision in mounting, and connects the lead wires of the drive line to the two metal plates. By using the spring as a spring, disconnection problems can also be eliminated.

The present invention will be explained below based on one embodiment.

FIG. 2 shows the pen up/down mechanism of the present invention, in which one end of each of two metal leaf springs 7 is fixed to the upper and lower flanges 21 and 2 of the pen holder, and the other end of the leaf spring is attached to a support member. Each is fixed to the casing that makes up the. Further, the leaf spring 7 applies an upward force to the pen holder so that the pen holder comes to rest on a stopper portion ♂l provided in a part of the housing.

In addition, the lead wire // from the drive wire wheel l is connected to the plate spring 7 near the i portion 2/, 22 of the pen holder 2 with little relative movement, and the fixed end of the plate spring is connected to the drive wire ring terminal. It has become.

With the configuration of the present invention as described above, the two plate springs are connected to the top of the drive line based on the current of 1 g to the drive line wheel.

The pen holder can be deformed only in the downward direction, and the pen holder can move upward and downward without causing sideways vibration.

In addition, there is no need for ball bearings that require high mounting accuracy, and the two plates serve as the return function for the pen holder λ and as the lead wire for the drive line, eliminating the risk of wire breakage and reducing the number of parts. It is possible to realize a pen up and down mechanism that can save money and provide stable movement at a low cost.

[Brief explanation of drawings]

Figure 1 shows an example of a conventional movable ring pen vertical mechanism, B) is an external view, (B) is a longitudinal sectional view of the front, and 2)
The figure is a configuration diagram of an embodiment of the present invention. /: Drive line wheel, 2: Pen holder, 3: Permanent magnet. Magnetic circuit, μ: ball bearing, j: linear ball bearing, 6: coil spring, 7: leaf spring, g: housing, ri: drive wire terminal. -5- (a) (rof'$
/Figure g/

Claims (1)

[Claims] In a movable wire ring type pen up and down mechanism for vertically driving a pen holder to which a drive wire ring is fixed, the pen holder is supported by two leaf springs that are fixed in the vicinity of the upper and lower ends of the pen holder and are deformable in the vertical direction. A pen up-and-down mechanism characterized by each of the leaf springs serving as a lead wire for a drive wire wheel.