JPS59111865A - Printing hammer - Google Patents

Abstract

PURPOSE:To form the print hammer capable of quickly printing and having good printing quality, by attaching the end part of armature to the ceutral part of the flat spring, both ends of which are fixed in the spring charge type print hammer. CONSTITUTION:A print hammer is formed by fixing an armature 2 to the center of the flat spring 3, both ends of which are fixed to a yoke 4 (symbol 1 means a print wire), and on the other hand the method for generating elastic force composed of a magnet 5, a core 6 and a release coil 7 is arranged facing the armature 2. In the abovementioned print hammer, the armature 2 is generally attracted to the core 6 against the restoring force of magnet 5 is negated by applying power to the release coil 7, the armature 2 is sprung as shown by dotted line according to the restoring force of flat spring 3 and printed. However, because the rotary center 2a of armature 2 is always kept at a fixed position, useless deformation and vibration are not generated and the high speed stable print operation is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing machine, and particularly to a printing machine for a printing device used in an input/output device of an information processing device.

Recently, in the era of office automation, the input/output equipment of information processing equipment has rapidly progressed toward kanji processing and graphic processing, and printing equipment has rapidly become more and more advanced.

There is a growing need for higher speeds and higher density than ever before. Conventionally, various types of printing hammers have been developed for use in this type of printing device.

Among these, the spring-charged printing hammer is the first
As an example shown in the figure, a magnet 5, a core 6 connected to this magnet, and a release coil 7 provided on the core 6.
an armature 2 which is attached to a yoke 4 by a leaf spring 3 and has a printing wire l at its tip.
When no current is applied to the release coil 7, the armature 2 is attracted to the core 6 by the magnetic flux of the magnet 5 against the restoring force of the leaf spring 3, but the release coil 7
When a current is applied to cancel the magnetic flux of the magnet 5, the attractive force acting between the core 6 and the armature 2 is released, and the shear gusset air 2 is deflected as shown by the broken line due to the restoring force of the leaf spring 3. The printing wire 1 strikes the printing surface 8 with the printing wire 1 to perform a printing operation.

However, in such a printing hammer, as shown in FIG. 28, when the printing wire collides with the printing surface, the armature 2 is further displaced toward the printing surface, so the contact time between the printing wire l and the printing surface 8 is long. This has the drawback of hindering high-speed operation.

Further, as shown in Fig. 2b, when the current is turned off and the shear armature 2 is attracted to the core 6 by the magnetic attraction force, and the armature 2 and the core 6 collide, if the shape of the armature 2 is not appropriate, the armature 2 The tip further displaces in the opposite direction to the printing surface, and after the collision, undesirable vibrations remain, which has the disadvantage of interfering with continuous printing operations.

The present invention enables high-speed printing by attaching an armature to the center of a leaf spring with both ends fixed.

Moreover, a printing hammer with good printing quality is provided.

According to the present invention, it is possible to reduce the outer size of the print head, and it is possible to provide a small, high-speed, high-density print head.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 3 is a side view of a printing machine according to an embodiment of the present invention, in which both ends of an armature 1 having a printing wire 1 at its tip are fixed to the center of a leaf spring 3 fixed to a yoke 41C. There is. Further, the resilient force generating means for the armature is composed of a magnet 5, a core 6, and a release coil 7. Except for the method of supporting the armature 2, that is, the shape of the leaf spring 3 and the method of fixing the armature 2 and the spring 3, the structure is similar to that of the conventional printing hammer, and the principle of operation is also the same as that of the conventional printing hammer.

However, according to the present invention, the center of rotation 2a of the armature 2 is kept at a constant position, preventing the undesirable deformation and vibration that occur in conventional printing hammers, and contacting the printing wire 1 with the printing surface 8. Since the time can be shortened and the vibration after the collision between the armature 2 and the core 6 can be reduced, a stable printing operation can be performed at high speed. Further, by using the printing hammer according to the present invention, a printing head with a small external size can be provided.

[Brief explanation of the drawing]

Fig. 4 is a side view showing an example of a conventional printing hammer, Fig. 2a
1 and 2b are explanatory diagrams of the operation of a conventional printing hammer, and FIG. 3 is a side view of a printing hammer according to an embodiment of the present invention. 1... Printing wire, 2... Armature, 3... Leaf spring, 4... Yoke, 5
...Magnet, 6...Core. 7...Release coil, 8...Printed surface. -36: Atsushi, 3 mouth 6 4 z zb figure

Claims (1)

[Claims] A printing wire is provided at one end, and the other end is provided with a plate plate (having an armature supported by a plate, and means for generating a resilient force against the plate, and the printing wire is printed by the elastic force of the plate). In a printing machine that performs a printing operation by colliding a wire with a printing surface, both sides of the plate are fixed and the plate (
(Printing), which is characterized in that the armachia is fixed approximately in the center of the print.