JPS6325043A - Up-and-down body of type wheel in printer - Google Patents

Abstract

PURPOSE:To prevent turn trouble, noise and printing trouble relating to a wheel cassette, by a method wherein an elastic projection opened at the upper part thereof engaged with the boss part of a type wheel is provided on an up-and-down body and the engagement of the type wheel and the up-and-down body is released to allow both of them to be spaced apart from each other and, after printing, the type wheel is received in a housing. CONSTITUTION:The inside of the projection 1a of an up-and-down body 1 is formed into an almost oval notch shape engaging with the boss part 2a of a type wheel 2 and the upper part thereof is opened so that inclined surfaces 1c, 1d are formed upward left and right directions and notches 1e, 1f are respectively provided in the left and right side surfaces of said body 1 by drilling and a notch 1g is provided in the other side of the body 1 by drilling. A plurality of the up-and-down bodies are received in a housing and the boss part 2a of each of the type wheels 2 is engaged with the oval notch of the projection 1a opened at the upper part thereof of each up-and-down 1 at each home position and released so as to be spaced apart therefrom. The desired one of the plural type wheels 2 elastically engaged is moved upward to a position fitted to printing along with one of the up-and-down bodies 1 to be engaged with the rotary shaft 10 of a wheel motor and only the up-and-down body 1 is moved downward against the elasticity of the elastic projection 1a to be received in the housing 6 and, in this state, the type wheel 2 is selectively turned to perform printing.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for storing a plurality of desired type wheels, each of which is engaged with an upper and lower body, housed in a storage case movably mounted on a carrier. The present invention relates to upper and lower bodies of a type wheel in a printing device which is housed in an accommodating housing and has an 8th shift in a position suitable for printing.

Conventional technology Conventionally, as disclosed in Japanese Patent Publication No. 59-28469, printing was carried out with a type wheel housed in a wheel cassette, and a type wheel was stored in a housing housing mounted on a carrier so as to be movable. In a printing device that prints with a single desired type wheel that is respectively engaged with a plurality of upper and lower bodies housed, there is no technical disclosure of the upper and lower bodies that release and separate the upper and lower bodies from the type wheel during printing. .

Problems to be Solved by the Invention In the above-mentioned printing device, there are problems with rotation due to contact with the wheel cassette that is placed when the type wheel is selectively rotated, noise caused by vibration of the wheel cassette when printing with a printing hammer, and ribbon generation. There were problems with printing and securing space due to contact with the wheel cassette.

Means to Solve the Problem During printing, the engagement between the type wheel and the upper and lower bodies is released and separated, and after printing, the type wheel is housed in the housing by the upper and lower bodies. It is provided with an upper open elastic protrusion that engages with the upper opening.

A desired type wheel, which is engaged with a plurality of upper and lower bodies housed in a plurality of upper and lower housings suspended over the working carrier in a manner that the upper and lower bodies are placed in the home position, is placed together with the upper and lower bodies. After moving upward to a position suitable for printing, the type wheel is engaged with the rotating shaft at the home position of the wheel motor, and only the type wheel is positioned at a position suitable for printing. The type wheel is moved downward against the elasticity of the protrusions and housed in the storage case. In this state, the type wheel is selectively rotated to perform printing. After printing, the upper and lower bodies move up to remove the boss part of the type wheel. The elastic protrusions of the upper and lower bodies are engaged with each other, and after the rotary shaft of the wheel motor and the type wheel are disengaged, the type wheel is moved down together with the upper and lower bodies and housed in the housing.

Example 1 uses material with high elasticity, such as upper and lower bodies made of a polymer compound, and this upper and lower body 1 is formed into a substantially rectangular shape, with openings at the top and bottom, and an upper opening on the - side. An elastic protrusion 1a is formed, and the inner side of the protrusion 1a has a substantially elliptical notch shape that engages with a boss portion of a type wheel, which will be described in detail later. In the figure, sloped surfaces 1c and ld are formed and open toward the upper left and upper right, and notches 1e and if are bored on the left and right sides, respectively. Moreover, a notch tg, which will be described in detail later, is bored on the other side. Reference numeral 2 denotes a type wheel, and in FIG. 2, the type wheel 2 has a boss portion 2a projecting from the approximate center of the front side of the paper, and an engaging hole 2b at the center of the boss 2a, and an engagement hole 2b at the bottom thereof. In addition to the connecting holes 2c, each of the radially formed free pieces has a printed portion 2d on one side of its tip. The type wheel 2 and the upper and lower bodies 1 are assembled by elastically engaging the boss portion 2a in the oval notch of the upper open protrusion 1a to secure the type wheel 2 to the upper and lower bodies 1; In addition to being designed so that they can be released and separated, the connecting hole 2c for the home position and the notch 1g of the upper and lower bodies 1 are opposite to each other. This state is upper and lower body 1
This is the home position of the type wheel 2 with respect to . 3 is a carrier, and the carrier 3 has a side plate 3a.
and 3b are formed, and are configured to be movable in parallel to the axial direction of the platen P (left-right direction in FIG. 4). 4
is a pedestal, and the pedestal 4 moves inside the carrier 3 along the guide rail 5 in a direction perpendicular to the axial direction of the platen P (the fourth In the figure, it can be moved in the direction of the back of the paper cover.

Reference numeral 6 designates a storage case, and the storage case 6 is placed on the pedestal 4, and the upper and lower bodies 1 each having a plurality of type wheels 2 elastically engaged with each other as described above are mounted on the storage case 6. are housed parallel to each other. 7.7'i3 moving body 7
．． 7' is suspended so as to move up and down along the side plates 3a and 3b of the carrier 3, and the notches 1e and i of the upper and lower bodies 1
f, and is configured to move the upper and lower body 1 up and down together with the type wheel 2. 8.8' is a swinging rod, and the swinging rod 8.8' is provided to swing on the side plates 3a and 3b of the carrier 3, respectively, and a shaft 7a provided on the movable body 7.7'; Via 7b, the movable body 7.7' can be moved up and down. 9 is a wheel motor provided in the carrier, 10 is its rotating shaft, 11
12 is a connecting arm provided on the rotating shaft 10, and 12 is a protrusion provided on the connecting arm 11, which engages with the connecting light 2c of the type wheel 2 to connect the rotating shaft 10 and the type wheel 2.
It is designed to connect.

Since the structure is as described above, the plurality of upper and lower bodies housed in the housing 6, which is movably mounted on the carrier 3 via the pedestal 4, are elastically engaged as described above at their respective home positions. By swinging the swinging rod 8 upward, a desired one of the plurality of matching type wheels 2 is moved upwardly to a position suitable for printing via the movable body 7, 7' and the upper and lower bodies 1. hand(
(Figure 4 shows this state), the rotation shaft 10 of the wheel motor is inserted into the engagement hole 2b of the type wheel 2, and the protrusion 12 of the connecting arm 11 provided at After engaging and connecting the connecting beams 2c through the notches 1g (see FIG. 5), the swinging rod 8.8' is connected to the movable body 7.7'.
and move it downward together with the upper and lower body 1 (Figs. 6 and 7).
(as shown in the figure), the elastic projections 1a of the upper and lower bodies 1 are released and separated from the bosses 2a of the type wheel 2 against the elasticity, and the upper and lower bodies 1 are housed in the housing 6 (as shown in the 8th figure). In this state, the type wheel 2 is selectively rotated to perform printing. When printing is completed, the upper and lower body 1 is moved upward via the swinging rod 8.8' and the movable body 7.7', and elastically engages with the boss 2a of the type wheel 2 along the inclined surface IC.1d. When the rotation shaft 10 of the wheel motor 9 comes out of the engagement hole 2b of the type wheel 2, and the protrusion 12 comes out of the connection hole 2C, the upper and lower bodies 1 move to the type wheel 2'.
is held in its home position (the notch tg and the connecting hole 2C are in the same position) and is accommodated in the housing in an elastically engaged state. Further, in the above embodiment, the boss portion 2a of the type wheel 2 and the protrusion portion 1a of the upper and lower body 1 are provided on the negative side, but the same effect as described above can be obtained even if the protrusion portion 1a is provided on both sides. can be implemented.

Effect: By providing the upper and lower bodies with the open elastic protrusions, the upper and lower bodies and the type wheel can be elastically engaged and released, allowing the type wheel to be positioned at the printing position during printing. Since it is separated from the upper and lower members, there is no problem with rotation due to contact with the wheel cassette when the type wheel selects rotation as in conventional type wheels, and vibration of the wheel cassette when printing with a printing hammer. In addition to being able to eliminate all problems such as the noise caused by contact between the ribbon and the wheel cassette, printing problems caused by contact between the ribbon and the wheel cassette, and securing space at the printing position, the structure is not only simple as described above, but also works reliably. The effects brought about by this are extremely large.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway perspective view, FIG. 2 is a front view in use, and FIG. 3 is a partially cutaway plan view. Figure 4 is a front view shown in a different state of use from Figure 2, Figure 5 is a partial side view with a section cut away, and Figures 6 and 7 are the same. Partial front view shown in different states of use, No. 8
The figure is a partially cutaway front view. 1-m-upper and lower body, 1a-m-elastic protrusion, lc・1d-
-One slope, 1e/1f--completely cut out, 1g-m-notched,
2-m-type wheel, 2a-m-boss part, 2b-m-
Engagement hole, 2C-m series connection hole, 2d-m-type part, 3-
m-carrier, 3a/3b-m-side plate, 4--one pedestal,
4a-1-rack part, 5--, guide rail, 6--accommodation box, 7.7'-
-One moving body, 7g, 7b--One axis, 8.8'-m-Swinging rod, 9--Wheel motor, 10-m-Rotating shaft, 11
--Series connecting arm, 12--one protrusion, P---platen. Patent applicant Canon Co., Ltd. 3-Kideria

Claims (1)

[Claims] Printing is carried out with a desired one character wheel that is engaged with each of the upper and lower bodies housed in a plurality of housings that are movably mounted on a carrier that is movable in parallel to the axial direction of the platen. A type wheel in a printing device which selectively prints at a position suitable for a printing device, characterized in that the type wheel is provided with an upper open elastic protrusion that engages with a boss portion of the type wheel. upper and lower body.