JPS59224380A - Supporting device for printing head of printer - Google Patents

Abstract

PURPOSE:To enable to fit and detach a printing head and a carrier by a single action, by a method wherein positioning projections and positioning holes provided at faced surfaces of a printing head and a carrier are engaged to each other, both ends of a clamp are fitted to the carrier, and the clamp is turned. CONSTITUTION:The positioning holes 16 of the printing head 10 and the positioning projections 15 of the carrier 1 are engaged to each other, and the clamp 17 having legs 19 fitted into holes 18 provided in a stopper 9 of the carrier 1 is turned, whereby rollers 22 pull both sides of the clamp 17 and roll while pressing the upper surfaces of ribs 23 to be springingly engaged into recessed parts 24. In this condition, the clamp 17 is bent within the limit of elasticity, the roller 22 consisting of an elastic body is also deformed, and the printing head 10 is elastically pressed against the carrier 1 and firmly fixed. On the other hand, when the clamp 17 is turned downward by gripping a knob part 21, the head 10 can be detached from the carrier 1. Accordingly, the printing head can be fitted and detached by a single action.

Description

TECHNICAL FIELD OF THE INVENTION This invention relates to a print head holding device for a printer.

Technical background of the invention and its problems In a printer with a print head mounted on a carrier,
There is a need to satisfy the conditions of reliably fixing the print head, while at the same time making it extremely easy to attach and detach the print head, but no product has been found that satisfies these two conditions.

Purpose of the Invention The present invention has been made in view of the above points, and an object of the present invention is to provide a print head holding device for a printer that can securely fix a print head and also allow one-touch attachment and detachment of the print head. It is something.

Summary of the Invention This invention positions a print head and a carrier by engaging each other with a positioning protrusion and a positioning hole provided on opposing surfaces thereof, and also attaches both ends of a clamp made of steel mesh to the carrier so as to be rotatable. , by rotating this clamp, the print head is pressed against the carrier, and therefore the print head can be attached or detached with a one-touch operation of rotating the clamp without the use of tools, and since the clamp is held at both ends. It is made of 4n so that it will not come off from the carrier even if it receives resistance from the print head, and therefore the print head can be firmly fixed.

Examples of the invention An embodiment of the invention will be described with reference to the drawings.

(1) is a carrier made of diamond, and the front part of this carrier (1) has a bushing (3) that fits into the carrier shaft (2), and the rear part has a bushing (3) that fits into the carrier shaft (4). The bush (5) is regulated from moving in the axial direction by the lip (6) and is pressed against the leaf spring (7). Furthermore, a pair of left and right columns (8) and upwardly directed stoppers (9) located on both outer sides of these columns (8) are integrally formed on the front upper surface of the carrier (1).

Next, a pillar (8
) is integrally formed with a protrusion 4 placed on the upper surface and a nose portion I that holds the needles together. A circular positioning protrusion is formed on the upper surface of the support column (8), and positioning holes 4 are formed on both sides of the protrusion U4.

A clamping fin made of steel wire is then provided. This clamp fin is formed with legs (2) to be inserted into holes Ql formed on both outer sides of the support (8), a suppressing part (4), and a gripping part, and a roller shear 4 is rotatable at the end of the pressing part. is mated to. Then, two arc-shaped ribs (2) centering on the hole are formed on the fourth protruding piece u4 (printing spatula), and a recess (2) which is a locking part is formed in the middle part of these ribs (c). ) is formed.

Furthermore, a rack-shaped support piece (C) is integrally formed under the front of the carrier (1). The support piece (c) is formed in the same shape as the timing belt (4) so as to mesh with the teeth of the timing belt (4). A holding plate (2η) that holds down the timing belt (4) is attached to the carrier (1) with screws (C).The timing belt (4) is endless and is held by pulleys placed on both sides of the platen (not shown). One of the pulleys is connected to the carrier motor.

In such a configuration, the positioning holes 4 of the print head α [and the positioning protrusions (I9) of the carrier (1) are engaged,
Hold the knob a1) and turn the clamp u7) t.

As a result, the roller (c) moves while pulling both sides of the clamp 11 and pressing the upper surface of the lip (c) with a strong force, and elastically locks into the recess (2).This locked state So,
The clamp aη is bent within its elastic limit, and the elastic roller (c) also deforms by itself, so that the print head Ql is elastically pressed against the carrier (1).

In particular, since the legs 4 at both ends of the clamp housing 7) are held in the hole a barrel, even if the roller (c) is subjected to a strong force, it will not come off like one side would. Therefore, print head α1
can be firmly fixed.

Further, by turning the clamp μ7) downward with the knob ψυ, the print head can be removed from the carrier (1). The downward stroke of the clamp (L7;) is determined by the stopper (9).

In this way, the print head Ql can be attached and detached with one touch by simply turning the clamp <17) t.

Note that the recessed portion (to) may be directly pressed by the pressing portion 4 without using the roller rail 4. Also, carrier (
1), and a positioning protrusion (151t) may be formed on the print head 4.

Effects of the Invention Since this generator 8A is configured as described above, the clamp l
! 21Iib operation allows you to attach and detach the print head with a single touch.Moreover, since both ends of the steel wire clamp are held in the carrier, the print head can be firmly held down. It also has the advantage of being extremely simple in structure.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway side view, and FIG. 2 is an exploded perspective view.

Claims (1)

[Claims] 1. A positioning hole and a positioning protrusion that engage with each other are provided on the opposing surfaces of a carrier that reciprocates along the grana and a print head, and a retaining portion is provided on the print head, and this retainer is provided with a positioning hole and a positioning projection that engage with each other. A steel wire clamp having a pressing part that elastically engages with the joint part and presses the print head against the carrier is provided, and both ends of the clamp are rotatably attached to both sides of the carrier. Print head holding device for printers with 2. The print head holding device for a printer according to claim 1, wherein a roller is fitted to the pressing portion. 3. The print head holding device for a printer according to claim 1 or 2, wherein the carrier is provided with a stopper that comes into contact with the clamp.