JPH0563854U - Printer device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to reduce the height of the printer. [Structure] According to the present invention, a pair of left and right support parts are provided upright on a base metal member, a platen roller is pivotally supported between the support parts, and a pressure spring composed of a leaf spring is provided between the platen roller and the base metal member. A line dot type thermal head is mounted on the pressure spring at a position facing the platen roller.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printer device used for printing texts created by a personal computer, word processor, or the like.

[0002]

[Prior Art]

 Serial printers such as dot printers and thermal transfer printers are often used as printers for printing personal computers, word processors, etc.However, the wire dot type has a lot of noise and the thermal transfer type has a high running cost. is there.

In recent years, portable computers such as laptop computers have become the mainstream for personal computers, word processors, etc., and along with this demand for smaller printers, there is a demand for smaller printers. Since the carriage is installed upright and a moving mechanism for the carriage is required, it is difficult to reduce the thickness.

Therefore, in order to make the printer body thinner, for example, a line dot type thermal head as shown in Japanese Utility Model Laid-Open No. 58-120043 is used, and the thermal head is arranged below the platen roller. Although it can be made quite thin, there is a problem that the head itself becomes thicker because it is generally constructed in a molded case for heat dissipation, such as aluminum.

[0005]

[Problems to be solved by the device]

 An object of the present invention is to reduce the thickness and weight of a printer mechanism using a line dot type thermal head.

[0006]

[Means for Solving the Problems]

 According to the present invention, a pair of left and right supporting portions are provided upright on a base metal member, a platen roller is pivotally supported between the supporting portions, and a plate spring is mounted between the platen roller and the base metal member. A line dot type thermal head is attached to the spring at a position facing the platen roller.

[0007]

[Action]

 At the time of printing, the recording paper is mounted between the platen roller and the thermal head to perform the printing operation, so that the leaf spring securely presses the thermal head against the recording paper, and the thermal head prints on the recording paper. ..

[0008]

【Example】

 First, an embodiment according to the present invention will be described with reference to FIGS. 1 and 2. (1) is a base metal member formed by bending a sheet metal, and a pair of support parts (2) and (2) are integrally formed at both left and right ends. It is bent and formed.

(3) is a platen shaft which is located between the support parts (2) and (2), and which is vertically rotatably and rotatably supported by vertically long guide holes (not shown) having both ends bored in the support parts. As is well known, a platen roller (4) whose outer surface is made of an elastic material such as rubber is integrally mounted.

(5) is a leaf spring mounted between the base metal fitting (1) and the platen roller (4), and one end of which is fixed to the base metal fitting (1) with screws (6), (6) and (6). , The other end is always urged by its own elastic force so as to be pressed against the platen roller (4), and the stopper (7) restricts the movement of the other end toward the platen roller (4) beyond a predetermined level. ing.

(8) is a line dot type thermal head mounted between the platen roller (4) and the leaf spring (5) and attached to the other end of the leaf spring. It is located directly below the platen roller (4).

Reference numerals (10) and (10) denote release brackets attached to both ends of the platen roller (4), one end of which is rotatably supported by support pins (11) and (11) and the other end of which is attached. A support shaft (12) (12) for pivotally supporting both ends of the platen shaft (3) is formed, and a release shaft (13) having a substantially oval cross section is provided side by side with the platen roller (4). Insert the through holes (14) (14) with a roughly half-moon shape in the cross section, and rotate the release shaft (13) to rotate the release shaft (13) so that the end of the through hole (14) (14) When it is located in the straight line part (15) (15), the platen roller (4) is driven to approach and separate from the thermal head (8) to feed paper between the heat generating part (9) of the thermal head and the platen roller (4). It is configured to form a gap (16).

Reference numeral (17) is a stepping motor having screws (18) and (18) fixed in place on the base metal fitting (1), and the platen roller (4) is fixed through a plurality of gears (19) (19). Drive to rotate.

Reference numeral (20) is a release knob attached to one end of the release shaft (13).

When printing, the release knob (20) is used to rotate the release shaft (13), and the end portion of the release bracket (10) is aligned with the insertion holes (14) and (14) of the release bracket (10) (10). By rotating the release bracket (10) to the position shown in FIG. 3 at the parts (15) and (15), the platen shaft (3) is separated from the thermal head (8) and the leaf spring ( Since 5) hits the stopper (7) and stops, a paper feed gap (16) is formed between the heat generating part (9) of the thermal head (8) and the platen roller (4). Therefore, after setting the recording paper (21) in this gap, rotate the release knob (20) again to rotate the release brackets (10) (10), and as shown in FIG. The print can be performed by putting the recording paper (21) against the heat generating portion (9) of the thermal head (8) with the recording paper (21) interposed therebetween.

[0016]

[Effect of the device]

 With the configuration according to the present invention, the thermal head is attached to the leaf spring, and the leaf spring is also used as the heat radiation plate of the thermal head, so that the thickness of the thermal head can be made thin and the height of printers, word processors, etc. can be greatly increased. It is possible to reduce the cost and reduce the cost by reducing the number of parts.

[Brief description of drawings]

FIG. 1 is a plan view of the present invention.

FIG. 2 is a vertical cross-sectional side view of essential parts for explaining the operation of the present invention.

FIG. 3 is a vertical cross-sectional side view of a main part for explaining the operation of the present invention.

[Explanation of symbols]

 1 base metal fitting 2 support part 4 platen roller 5 leaf spring 8 thermal head

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right support portions are provided upright on the base metal member, and a platen roller is pivotally supported between the support portions,
A printer device, wherein a plate spring is mounted between the platen roller and the base metal fitting, and a line dot type thermal head is mounted at a position of the plate spring facing the platen roller.