JPS6044367A - Supporter for thermal head - Google Patents

Abstract

PURPOSE:To eliminate the needs to vertically move a thermal head every printing time by supporting an elastic part to support a thermal head by two elastic pieces extending toward the driving direction of a card in a vertically movable manner to the printing face. CONSTITUTION:When a card 7 is inserted between a thermal head 8 and a roller 15, the heating point 8a of the head is pushed up toward the direction of being separated from the roller 15 by the card 7, the elastic force of elastic pieces 10a and 10b acts on the direction of the roller 15, and the heating points 8a is pressed on the card 7 under a proper set pressure. Under the condition, the head 8 is electrically energized through a flexible printed base plate 19, the heating point 8a is heated, and thermal printing is made on the card 7. The needs to vertically move the card in relation to the ticket paper every printing can be eliminated, and a simplified and miniaturized constitution of printer can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a support device for a thermal head in a thermal printing section used in a ticket vending machine, a number processing terminal, etc.

〔background〕

Conventionally, in thermal printing units such as ticket vending machines and ticket processing terminals that use single-sheet paper, the thermal head needs to be raised and lowered relative to the spring paper each time printing is performed to prevent the spring paper from jamming. Therefore, the device has the disadvantage of being large and complicated.

〔the purpose〕

SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks and provides a thermal head support device that is extremely effective when incorporated into a small machine that issues and processes small-sized spring sheets.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

1 to 3 are a plan view, a front view, and a left side view showing one embodiment of the present invention.

In the figure, 1 is a guide means, and an upper guide plate 2 and a lower guide plate 3 are fixed with screws 4 to form a card passage 5 and a card slot 6. A thermal head 8 is fitted onto a movable member made of a resin frame shown in 9 to assess adhesion.

Its detailed diagram is shown in Figure 4.5. The movable member 9 has elastic pieces 10 corresponding to the driving direction of the inserted card.
a and 10b are provided protrudingly. These elastic pieces 10a and 10b may be configured to be molded with the frame-shaped body 11 into which the head 8 is inserted.

A locking shaft 12 and a locking portion 10c are formed at the distal ends of the elastic pieces 10a and 10b, respectively.

In this case, the locking shaft 12 has a structure in which a locking groove is formed in the circumferential surface of the cylindrical body so as to surround it, and the locking shaft 12 is designed to lock the upright piece 13a of the upper guide portion 2, which is shown in an enlarged view in FIG. Bearing 14
Further, the locking groove 12a is locked to prevent axial movement, and the locking portion 10c is a part of the elastic piece 10b, and the upright piece 13' is shown in an enlarged view in FIG. Place it in the lock receiving groove 14b of b.

The movable member 9 is supported by the upright piece 13 by the elastic pieces 10a and 10b.
By being supported between a and 13b, the thermal head 8 faces into the card passage 6 from the hole 2a of the upper guide part 2, and its heat generating point 8a is set in contact with the roller 15, which is a positioning member, and the thermal head is A rest position is defined.

The roller 15 is made of heat-resistant resin, and includes a shaft 16 and an E-ring 17 that support the upright pieces 18a and 18b4 of the lower guide plate 2.
It is rotatably supported, and its outer peripheral portion faces the card passage 6. Note that instead of the roller 15, the lower guide plate 2 may be embossed to provide a convex portion within the card passage. Electricity is supplied to the thermal head via the flexible printed circuit board 19 to the soldered terminals 8b of the head.

The card 7 is driven in the direction of the arrow 20 shown in FIG.
When the thermal head is inserted between the rollers 15 and 15, the heat generating point 8a of the thermal head is pushed up by the card 7 in the direction away from the roller 15, that is, in the direction of the white arrow 21, and the elastic biasing force of the elastic pieces toa and tab is pushed in the direction of the roller 15. The heating point 8a of the thermal head is pressed against the card 7 with an appropriate set pressure. In this state, when electricity is applied to the thermal terminal 8b via the flexible printed circuit board 19, the heating point 8a thermally prints on the card 7.

〔effect〕

As described above, according to the present invention, it is possible to provide a thermal printing section that is small and has a simple structure without the need to raise and lower the thermal gutter relative to the ticket paper every time thermal printing is performed.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a left side view, Fig. 4 is a side view showing details of the movable part, and Fig. 5 is its front view. Bottom view, Figure 6 shows the standing piece 13
FIG. 7 is an enlarged view of the upright piece 13b. 1...Guidance means, 8...Thermal throat, 9...
- Movable members, 18a, 18b... standing pieces (supporting members)
, 15...roller (positioning member). Representative Patent Attorney Takashi Okabe Figure 3 Figure 1 1/16a l) 1ΦD Figure 4 Figure 5 Figure 6 Figure 7 Figure 4a 329-

Claims (1)

[Scope of Claims] A guide means forming a card passage capable of accepting a card provided with at least one thermal printing surface, a movable member having a thermal head supported by two elastic pieces extending in the direction in which the card is driven, the movable member. act on the supporting member of the movable member, which supports the thermal head so that it can move up and down in the direction perpendicular to the printing surface of the card, and exposes its heat generation point into the card path, and the thermal head, thereby supporting the thermal head. - A thermal head support device including a positioning member that positions the throat in a state where the elastic piece is biased in a direction away from its heat generating point.