| CPC B41J 3/36 (2013.01) [B41J 2/32 (2013.01); B41J 29/02 (2013.01)] | 4 Claims |
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1. A printing unit, comprising:
a platen roller, which extends in an axial direction, and is configured to convey a recording sheet;
a thermal head configured to perform printing on the recording sheet through press contact with an outer peripheral surface of the platen roller;
a support plate, which is arranged on a side opposite to the platen roller across the thermal head, and is configured to support the thermal head;
a frame, which includes a rear plate portion arranged on a side opposite to the platen roller across the support plate, and is configured to support both ends of the support plate in the axial direction;
at least one urging member, which is arranged between the rear plate portion and the support plate, and is configured to press the support plate to the platen roller side; and
a protruding portion, which is formed on the support plate to protrude from the support plate to the rear plate portion side, and is configured to regulate displacement of a predetermined urging member of the at least one urging member,
wherein a recessed portion is formed in a portion of the rear plate portion opposed to the protruding portion in a thickness direction of the support plate,
wherein the recessed portion has a depth larger than a height of the protruding portion, which is capable of preventing the protruding portions from making contact with the recessed portions.
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