JPS5838627A - Manufacture of plate spring of dot printer head - Google Patents

Abstract

PURPOSE:To easily manufacture a titled plate spring having high accuracy, by placing a plate spring across on a hole of a plate provided with a rectangular hole of suitable dimensions, positioning and fixing it, and after that, punching the plate to which the plate spring has been fixed, to a prescribed shape, by a press. CONSTITUTION:A plate 32 provided with a rectangular hole 31 having length l2 and width d2, and a plate spring 33 having length l1 (l1>l2) and width d1 (d2>d1) are prepared. In this case, the length l2 of the hole 31 prescribes effective length of the plate spring 33, therefore, a hole scarcely having a fracture with high accuracy is opened. On the hole 31 of the plate 32, the plate spring 33 is positioned, and high temperature brazing is executed. Subsequently, this plate 32 is punched to prescribed dimensions by a press, and a plate spring 34 having fitting plate 32 for prescribing effective length l2 of the plate spring 33, on both ends is formed. This plate spring 34 is installed to an armature 24 and a plate spring fixing block 26, and is fixed by brazing or a screw, etc. In this case, said plate spring is installed by span L which is a little longer than the effective length l2, by considering swelling at a brazed edge part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a plate for a dot printer head.

1I shows an overall schematic diagram of a wire dot printer. A platen 2 is rotatably supported on the frame IK, and the line feed operation is performed by a line feed drive motor (not shown) via a gear 3. The print medium 4 is set on the platen 2 and is fed by sprockets 5ab5b. The carrier 6 is guided by a guide shaft 7 and a feed screw 8. The carrier 6 is rotated by the feed screw 8 company space motor 9 via the belt 10Th, and the carrier 6 is rotated by the platen 2 by this rotation.
The space is moved in the direction of arrow A along . career 6
A print head 11 is mounted on the printer. Printing head 11
is provided with a plurality of printing wires and an electromagnetic mechanism for driving them, and the electromagnetic mechanism is selectively driven in synchronization with the movement of the carrier 6. Ink ribbon cassette 1
2 has an ink ribbon 13 built therein, and this ink ribbon 13 runs between the print head 11 and the print medium 4.

As the electromagnetic mechanism for driving the printing wire in this print head II, an open type and an attraction mechanism are generally adopted. Hold one end of Amachi Island A〇 and connect the printing wire to the other end. Normally, the magnetic attraction force of the permanent magnet holds the Amachi Island A〇, and when printing, a current is applied to the fill to create a permanent magnet. The attraction force is applied to the layer, and the elastic force of the armature separates the magnetic material. This operation moves the printing wire toward platen 2,
Dot printing is performed, and when the current in the coil is cut off, the armature is attracted by the permanent magnet and returns to the base of the printing wire.

The print head of a release type impact type dot printer has a structure as shown in Figure 2.
At this time, the energy stored in the spring 25 is transferred to the coil 23.
By generating a magnetic force in the opposite direction to the magnet, it emits and gives an impact force.

26 is a plate spring fixing block, 27 is a block, 28 is a beam, and 29 is a wire.

The characteristics of the leaf spring used here, particularly the spring constant, greatly influence the characteristics of this print head.

Conventionally, leaf springs are made by punching out a leaf spring material using a press, inserting the leaf spring into the leaf spring identification grooves provided in the leaf spring fixing book A and A, and fixing the 114 ends by brazing. was.

However, this method has the problem that it is difficult to position and fix the effective length of the leaf spring with high precision, resulting in variations in characteristics.

The present invention has been made in consideration of the above-mentioned points, and provides a method for manufacturing a leaf spring for use in an amateur system, which has a print wire fixing part, a suction part, an elastic member, and an elastic member fixing part for a print head for a printer. It is something.

The purpose of the present invention is to create a leaf spring with a length and width d, a total length L tube.
(t+ > tt) Step of positioning and fixing by crossing over the hole of a plate provided with a rectangular hole with width d1, punching out the plate to which wIiIi springs are fixed into a predetermined shape with a press, and applying plate springs to both ends of the plate springs. This is achieved by a method for manufacturing a leaf spring for a dot printer head, which is characterized by comprising a process for manufacturing a leaf spring having an attachment interface that defines its length.

The following WJt shows the leaf spring manufacturing process S in the Kien-kJES diagram.
-Refer to and explain.

As shown in the perspective view of FIG. 3(a), the length is 1. A plate 32 with a rectangular hole 31 having a width d and a length t3. Leaf spring 33 with width d.
Prepare. The hole 31a is formed by punching it to a predetermined size using a press. At this time, since the length t of the hole 31 defines the effective length of the leaf spring, the hole is drilled with high precision to reduce the fracture Ijk. When punching the rectangular hole 31 in the plate 32 with a press, the plate 32 has a cut surface 32', a torn broken surface 32" at the bottom, and a sag at the top, as shown in FIG. 32"' Th occurs, so the fracture surface of the press 32
"Unevenness may occur due to K. If this is a problem, cut the cut surface 332 including the fracture surface 321 K"
Once the "t-grinding" is removed, the effective length of the leaf spring can be defined with high precision by the cut surface 32'.

The leaf spring 33 can be a spring that is pressed into a predetermined size and shape from an elastic member.

The plate spring 33 is positioned on the plate 32 provided in the rectangular hole 31 as shown in FIG. 3(b)K, and high-temperature brazing 1 is performed.
Next, this plate is punched out to a predetermined size using a press, as shown in Fig. 3<c.
Mounting plate 3 that defines the effective length of the leaf spring 33 at both ends shown in
A leaf spring having 2t and 34t is formed.

The armature 24 and the plate spring fixing block 26KJI are fixed as shown in FIG. 3(d). Attachment can be done with solder, screws, etc.

The installation is performed using the effective length 1 of the leaf spring as shown in Figure 3(d)K.
, install it with a slightly longer span L by 5%.

When the entire plate spring is brazed to the above-mentioned span LFi armature 24 or the control plate bar fixing block 26, the p rise at the v-shaped edge portion is also pre-layered.

According to the manufacturing method of the leaf spring of the present invention, (1) Since the hole in the leaf spring 32 can be punched out by pressing, the size can be obtained with high precision and without variation, so that the effective length t of the leaf spring can be maintained with high precision.

■ Itabane 33 wires Because it can be made into a simple shape, the thickness can be determined with extremely high precision by wrapping, etc.
In addition, since it is easy to create rounded edges on the end face, it is possible to create springs with high fatigue limits.■ Normal mass production methods such as pressing, wrapping, and mounting can be applied as is.

■ During brazing, the material is pure metal (large alloy).
t- If used, the effective long edge 35Fi Fig. 3 (d
′), very sharp results can be obtained, and variations in the spring constant can be reduced.

It has the following advantage.

The Kinoi W14 has an amateur system that has a printing wire fixing part, an adsorption part, an elastic member, and an elastic member fixing part that completely fixes the printing wire, and an electromagnetic mechanism that drives the amateur system.
When the coil of the electromagnetic mechanism is energized, the armature system swings, and the swing causes the printing wire to swing toward the platen, which is used in the armature system of a dot printer head that forms a dot society. Leaf springs can be easily manufactured with precision.

[Brief explanation of drawings]

1Ill is a plan view of the wire dot printer, FIG. 2 is a sectional view of the print head, and FIG. 3 is a diagram showing the manufacturing process 1 of the leaf spring of the dot printer head of the present invention. 1: Frame, 2 Nibraten, 3: Gear, 4: Print medium, 5a, 5b: Sugu 4 Kate, 6: Carrier, 7: Guide shaft, 8: Feed screw, 9 Nice space motor, 10
: Bell), 11: Print head I2: Ink ribbon cassette, 13: Ink ribbon, 21: Magnet, 22: Core, 2
3: Coil, 24 near gusset, 25: Leaf spring, 26:
Block for fixing leaf spring, 27: Pocket, 2B=beam, 29: Wire, 31: Hole, 32: Plate, 33: Leaf spring,
35: Engineering, ji. Mushroom 2 diagram

Claims (1)

[Claims] A board of length LH1 width d (with length At(tt>tt
) A step of positioning and fixing a plate having a rectangular hole with a width am (chapter d>as) by passing it over the hole t, and positioning and fixing the plate spring v
vAmt, 9@ with a press into a predetermined shape, and the plate spring of the dot printer head is completely characterized by having a process of manufacturing a plate spring having a mounting plate with a specified effective length at both ends of the plate spring. Production method.