JP2811355B2 - Simple support mechanism for print mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a simple support mechanism for a print mechanism that is openably and closably supported by a lower cover that accommodates a print control circuit with a front portion as a fulcrum, and easily supports the print mechanism in an open state. The purpose of the present invention is to provide a low-cost, simple support mechanism that can be fixed. A print mechanism section that integrally supports a movable carrier unit equipped with a print head and a line feed mechanism that transports paper, In a printer comprising a lower cover for housing a print control circuit for controlling the operation of the printing mechanism, which is supported to be openable and closable with a front portion as a fulcrum, one end of a driver for tightening each part of the printer when the printing mechanism is opened. A first engaging portion engageable is provided at a rear portion of the printing mechanism, and the other end of the driver is opened when the printing mechanism is opened. A second engaging portion capable of engaging with the structure in which the first engagement portion and the facing portion of the lower cover.

[Industrial applications]

The present invention relates to a simple support mechanism for a print mechanism that is openably and closably supported on a lower cover that houses a print control circuit with a front portion as a fulcrum.

At the time of maintenance and inspection of the inside of the printer, the printing mechanism is lifted from the rear and opened to perform the work. In this case, it is necessary to fix the printing mechanism in the open state.

[Conventional technology]

For this reason, conventionally, the printing mechanism is lifted and supported with one hand, but it is difficult to work for a long time.

In order to solve this problem, a method has been proposed in which a support rod is provided in the printer, and the open print mechanism is supported by the support rod. This method was proposed by the present applicant (Japanese Utility Model Application No. 58-159114, filed on October 14, 1983 (Japanese Utility Model Application Publication No. 60-67943)), and FIG. FIG. 4 is a plan view of the same printer. In the figure, 1 is a lower cover, 2 is a printing mechanism,
3 is a printed board, and 4 is a support bar. The lower cover 1 supports the printing mechanism 2 via stays 1a and 1b so as to be openable and closable. The print mechanism unit 2 includes a pair of side frames.
2a and 2b integrally support a carrier unit equipped with a print head, a paper feed mechanism, and the like. The printed board 3 is fixed to the upper portion of the lower cover 1 with screws or the like, and has on its upper surface electronic components constituting a print control circuit and connectors 3a for electrical connection with each mechanism. The print control circuit performs print control for driving a print head in accordance with print information to perform printing, spacing control for moving a carrier along a platen, line feed control for rotating a platen and a sprocket for transporting paper, and the like. It is. The support bar 4 is normally fixed in the lower cover 1 by a fixing tool 1c as shown in FIG. 4, but when supporting the open printing mechanism as shown in FIG. As shown in the figure, the print mechanism 2 is supported and fixed in an open state by engaging one end with the rear part of the print mechanism 2.

In FIG. 3, 2c is a line feed drive motor, 2d is a pulley coaxial with the platen, 2e is a sprocket, and these constitute a sheet feed mechanism together with a power transmission system. Also, 2f, 2g
Are rubber feet for supporting the printing mechanism 2 when closed.

[Problems to be solved by the invention]

However, in the supporting and fixing method using the supporting rod, it takes time and effort to remove and set the supporting rod as shown in FIG. 3, and requires extra parts (the supporting rod 4, the fixing tool 1c) and is costly. Disadvantageous.

The present invention easily supports the printing mechanism in an open state,
It is an object of the present invention to provide a low-cost simple support mechanism that can be fixed.

[Means for solving the problem]

In order to achieve the above object, according to the present invention, a print mechanism unit that supports a movable carrier unit having a print head mounted thereon and a line feed mechanism that transports a sheet is controlled by controlling the operation of the print mechanism unit. A lower cover that accommodates a print control circuit to be opened and closed with a front portion as a fulcrum, wherein one end of a driver for fastening each part of the printer can be engaged when the print mechanism is opened. A joining portion is provided at a rear portion of the printing mechanism, and a second engaging portion engageable with the other end of the driver when the printing mechanism is opened faces the first engaging portion of the lower cover. This is a configuration provided in a portion where

(Operation)

When one end of the driver is engaged with the first engaging portion and the other end is engaged with the second engaging portion in a state of being opened to the printing mechanism, the printing mechanism is supported and fixed by the driver.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1 and FIG.

FIG. 1 is a side view showing a main part structure of a printer to which the present invention is applied, FIG. 2 is a perspective view showing an open state of the printing mechanism section, in which 11 is a lower cover, 12 is a printing mechanism section, Reference numeral 100 denotes a driver used for fastening various parts of the printer.

The lower cover 11 corresponds to the conventional lower cover 1, and includes a power supply, a control printed board, an interface printed board, and an operator panel printed board, each of which includes an electronic component and the like. Control the operation. At the rear of the lower cover 11, a concave second engaging portion 13 with which one end of the driver 100, for example, a tip portion can be engaged is formed. The second engaging portion 13 can be formed at the same time when the lower cover 11 is formed.

The print mechanism unit 12 corresponds to the conventional print mechanism unit 2 and integrally supports a movable carrier unit with a print head mounted thereon and a line feed mechanism for transporting paper. It is openably and closably supported via a pair of stays 14 provided on the front left and right. The rear frame 15 of the printing mechanism 12 has a concave first engaging portion 16 with which the head at the other end of the driver 100 can be engaged. The first engaging portion 16 can be formed at the same time when the rear frame 15 is formed, and faces the second engaging portion 13.

Now, as shown in FIG. 2, with the print mechanism 12 open, the head of the driver 100 is in the first engagement portion 16, the tip of the driver 100 is in the second engagement portion 13, and When they are engaged with each other, the print mechanism unit 12 is supported and fixed by the lower cover 11 via the driver 100. This operation is very easy, and with this print mechanism open,
Maintenance and inspection inside the print can be easily performed. When closing the print mechanism 12, the driver 100 can be removed to easily close the print mechanism 12.

〔The invention's effect〕

As described above, according to the present invention, the printing mechanism can be easily fixed in the open / closed state, and the opened printing mechanism can be easily closed.

In addition, extra parts such as support rods, which are conventionally required, are not required, and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part structure of a printer to which the present invention is applied, FIG. 2 is a perspective view showing a print mechanism opening and supporting state, and FIGS. 3 and 4 are conventional prints. FIGS. 11A and 11B are a side view and a plan view of a printer having a mechanism support mechanism, in which 11 is a lower cover, 12 is a print mechanism, 13 is a second engagement section, 16 is a first engagement section, and 100 is Driver.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaki Okuyama 1405 Daimaru Daimaru, Inagi-shi, Tokyo Inside Fujitsu Isotec Co., Ltd. (72) Inventor Hiroshi Takeda 1405 Daimaru Daimaru Inagi-shi, Tokyo Fujitsu Isotec Co. 72) Inventor Akira Takahashi 1405 Daimaru Daimaru, Inagi-shi, Tokyo Fujitsu Isotec Co., Ltd. (56) References JP-A-63-146657 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB Name) B41J 29/00

Claims (1)

(57) [Claims] A print mechanism (12) integrally supporting a movable carrier unit having a print head mounted thereon and a line feed mechanism for transporting a sheet, and controls the operation of the print mechanism (12). In a printer having a lower cover (11) for storing a print control circuit and openably and closably supported with a front portion as a fulcrum, one end of a printer tightening driver can be engaged when the printing mechanism (12) is opened. A first engaging portion (16) provided at a rear portion of the printing mechanism (12), and a second engaging portion capable of engaging with the other end of the driver when the printing mechanism (12) is opened. A simple support mechanism for a print mechanism, wherein (13) is provided on a portion of the lower cover (11) facing the first engagement portion (16).