JPS58104781A - Printer - Google Patents

Abstract

PURPOSE:To mount a printing head accurately through single operation by setting up a clamp, which elastically pushes the printing head and connects the head at the proper position of a carrier frame, as a member mounting the printing head to the frame. CONSTITUTION:The clamps 13, which consist of plastic having elasticity and have approximately L-shaped section form, are set up to the carrier frame 3 by elastically connecting the C-shaped fitting sections 14 of the clamps to shafts 12 in the encasing concave sections 9 of the carrier frame 3. In such constitution, the printing head 7 is placed while the connecting holes 11 of the lower surface of the printing head 7 are fitted to the bosses 10 of the frame 3 in order to mount the printing head 7. Accordingly, the position of the head is determined. The clamps 13 are turned to the insides, push sections 17 are connected elastically to the grooves 16 of the head 7, and the head 7 is fixed to the frame 3 under a pushed state.

Description

[Detailed description of the invention] The present invention relates to a printer.

Conventionally, screws have been used to attach the print head and the carrier frame that reciprocates at β angle to the platen.
The mounting position of the print head relative to the platen has a large effect on print quality, so the tolerance range for the mounting position is small. Therefore, the position of the print head relative to the carrier frame must be finely adjusted when tightening the screws, which may cause assembly problems. Maintenance KIIIL requires a high level of skill. In addition, the method of tightening screws requires a work step of tapping the carrier frame, and is cumbersome to manufacture.

The present invention has been developed based on these points, and an object of the present invention is to provide a printer in which the print head can be attached to a carrier frame with a single touch while accurately determining the position of the print head.

In this invention, the carrier frame and the print head are formed with a locking part that engages with each other to determine the relative position of the two, and nine clamps are rotated to attach the carrier frame to the print head. Both sides are pressed and fixed to the carrier frame, so the print head can be attached and detached without requiring any skill, and the clamp is rotatably supported within the storage recess formed in the carrier frame. In addition, the mounting space for the clamp is reduced, and by forming a semicircular rotation support part and a receiving piece that hold the clamp shaft in the storage recess, the clamp shaft can be rotatably supported. The first embodiment of this invention can be installed with one touch by simply pushing it between the part and the receiving piece.
This will be explained based on FIGS. 1 to 883. (1) is a platen, which is installed parallel to the platen (1), and a carrier frame (3) made of plastic is held by a nine guide shaft (2) so as to be able to reciprocate. The wires (4) fixed to both sides of the carrier frame (3) are wound around pulleys (5) arranged on both sides of the front of the platen (1), and are directly connected to a motor (6) that can rotate forward and backward. A pulley (not shown) is wound around K.

Next, in the center of the carrier frame (3) there is an opening (8) for housing the base of a print head (7) for a dot printer, and upper and lower openings located on both sides of this opening (8) on the platen (1) side. A storage recess (9) and a boss ring which is a locking part are formed □. A locking hole o1, which is a locking portion that engages with the 1#i boss α1mK, is formed on both sides of the lower surface of the tip of the print head (7).1. The carrier frame (3) is provided with a shaft (6) which is a rotary support part and is integrally formed with the shaft (6) which is connected to the opposing inner surfaces of the storage recess (9). . Thus, a pair of clamps are provided. These clamps (to) are made of elastic plastic, have an oval cross-sectional shape, and have a C-shaped end at one end that elastically engages with the shaft (2). A fitting part a◆ is formed at the other end, and a piece-shaped depression that elastically engages with the groove←Q formed on both @ of the flange (to) of the front end of the print head (7). A part α force is formed.

In such a configuration, the print head (7) is placed on the carrier frame (3) while fitting into the locking hole α1t boss αQ formed on the lower surface of the print head (7), so that it is not attached to the platen (1) or the carrier frame (3). The position is determined. Then, when the clamp (to) is rotated inward, the suppressing part αη engages elastically with the groove (2) K of the print head (7), suppressing the print head (7) against the carrier frame (3). 1-In this way, the print head (7) can be assembled very easily. In addition, since the clamp (to) is held on the axis α1 of the storage recess (9), the upper KTotD
No need to travel and can be assembled in a small space.

Modifications of the clamp 0 are shown in FIGS. 4 to 7, including a case where a notch (2) is formed in the fitting part α4 as shown in FIG. If the circumferential length of the shaft (6) and the K clamp (2) are made smaller and the circumferential length is made longer by forming a protrusion only in the center of the fitting part o4, the shaft (6) and the K clamp (2)
The force for combining - can be set to a desired value. Column 6
When the notch Ht shadow is formed in the suppressing part αη as shown in the figure, the pressing force of the print head (7) can be set to a desired value by using the elasticity of the suppressing part α force. Furthermore, as shown in FIG. 7, the shape of the fitting part α
By defining the U-shape, the fitting part α◆ is formed vertically, and an elastic piece eA1 is formed on the upper part of the fitting part α◆.
6) is used as a guide for fitting the fitting part (L4).
6) It is possible to prevent it from falling off.

Next, a second embodiment of the present invention will be explained based on FIGS. 8 and 9. Components that are the same as those in the embodiment described above are designated by the same reference numerals, and description thereof will be omitted (the same applies hereinafter).

(2) is a clamp made of plastic. This clamp holder has a pressing force sa'a and two legs hanging downward, and a shaft portion projecting laterally is integrally formed on each of these four O-legs. Furthermore, storage recesses (9) are formed in the carrier frame (3), and on the opposing inner surfaces of these storage recesses (9) there is a rotary shaft that rotatably holds the upper half of the shaft. A semicircular bearing surface (2) serving as a support portion is formed to protrude inward of the storage recess (9), and is a rotation support portion that rotatably supports the lower half circumference of the shaft portion. A semicircular bearing surface (support) is formed.

Then, while bending the legs inward, the shaft portion is engaged with the bearing surface. (2) molding K on the bearing surface
By placing the bearing surface (2) opposite to the lower surface of the storage recess (9) and positioning it at the bottom of the hole (2) formed on the upper surface of the carrier frame (3), the upper and lower parts can be separated. It is possible to mold to volume % using a mold with a simple 9-split structure.

Next, a third example of this invention is shown in FIGS. 10 to 1.
This will be explained based on Figure 2. 4 is a clamp made of plastic, and this clamp 24 has a suppressing part α force and two legs (to), and these legs (to) are integrally connected by a shaft part (to). There is. Therefore, the force is also formed in the opening of the clamp 4. However, the carrier frame (
The storage recess (9) formed in 3) has a bearing surface which is a rotation support part that protrudes from one opposing inner surface (B) into the opening 0 and supports the central upper half circumference of the shaft (to). (To)
are formed, and receiving pieces (b) are formed on the lower side of the leg (2) from both sides of the other inner 'rri' to elastically support the lower half circumference of both ends of the shaft part.

Therefore, the clamp ■ has its shaft (1) connected to the bearing surface (2).
) and the receiving piece (b), it can be easily attached by simply pushing it in between. Furthermore, as shown in Figure 13, a flat surface (to) is formed on the lower surface of the shaft (to).

By flatly joining the flat surface (to) to the upper surface of the receiving piece (b), the clamp (2) can be maintained in a stable state in which it is rotated outward. When the clamp @ is rotated inward from this state, moderation can be obtained.

Since this invention is constructed as described above, the printing head can be easily operated by simply placing the printing clamp on the carrier frame while engaging the locking parts with each other, and rotating the clamp. can be fixed to the carrier frame while positioning the clamp; and (9) by connecting the clamp to the rotation support part in the storage recess formed in the carrier frame, the mounting space for the clamp can be reduced. Furthermore, by forming the semicircular rotation support part and the receiving piece that hold the clamp shaft in the storage recess, the clamp shaft can be clamped by simply pushing it between the rotation support part and the receiving piece. It has the effect of heating up by attaching it with one touch.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a first embodiment of the present invention, in which the overall configuration is scaled down, Fig. 2 is an exploded perspective view showing the attachment relationship between the carrier frame and the print head, and Fig. 3 is an exploded perspective view of the first embodiment. FIG. 8 is an enlarged longitudinal sectional front view showing a state in which the print head is fixed with a clamp; FIGS. 4 to 7 are enlarged perspective views showing modifications of the clamp; and FIG. 8 is a second embodiment of the invention. FIG. 9 is an enlarged vertical sectional side view of the third embodiment of the present invention, FIG. 10 is a partially enlarged longitudinal sectional front view showing a third embodiment of the present invention, and FIG. FIG. 12 is an enlarged exploded perspective view with a portion cut away, and FIG. 13 is a perspective view showing a modification of the clamp. 1...Platen, 3...Carrier frame, 7...
- Print head, 9... Storage recess, lO... Boss (locking part), 11... Locking hole (locking part), 1... Shaft (rotation support part). 13... Clamp, 17... Pressing part, 22... Clamp, 26-27... Bearing surface (rotation support part), 29
... Clamp, 30 ... Shaft part, 33 ... Bearing surface (
Rotating support part), 34... Applicant Tokyo Electric Co., Ltd. Fig. 10 Fig. 15 Bacteria section 6 -5fv r1 Fig. Somo Fig. Division 9

Claims (1)

[Claims] 1. A carrier frame that reciprocates along the platen is provided, a locking portion is formed in the carrier frame and the print head to engage with each other to adjust the relative position of the two, and the carrier frame A printer characterized in that a suppressing part is formed to press an elastic IWK on both sides of the print head, and nine clamps are rotatably mounted while being arranged at a predetermined interval. 2. A carrier frame that reciprocates along the platen is provided, a locking portion is formed between the carrier frame and the print head to engage with each other to determine the relative position of the two, and the carrier frame is provided with a locking portion for determining the relative position of the print head. A storage recess is formed that is positioned on both sides and has at least a front surface open, and a clamp is provided inside the storage recess in which a suppressing part that presses both sides of the print head is formed, and the clamp is rotated by a nine-turn support part. This printer is characterized by being able to be installed freely. 3. A carrier frame is provided that reciprocates along the platen, and a locking portion is formed in the carrier frame and the print head to mutually engage with each other to determine their relative positions, and the carrier frame is provided with a locking portion that engages with the print head to determine the relative position of the two, and A storage opening located on the side with an opening on the top. A semicircular clamp is provided which has a shaft part and a suppressing part that forms a section and presses both sides of the print head, and a part of the outer periphery of the shaft part of these clamps is rotatably held. A printer characterized in that a rotating support part and a receiving piece elastically supporting a part of the outer periphery of the shaft part are positioned in the storage recess.