Support rod and printing machine

A printer, comprising:

• a first stencil support and a second stencil support, the first stencil support and second stencil support extending in a first direction and being arranged side by side, and a stencil mounting space for mounting a stencil being formed between the first stencil support and second stencil support;
• a pair of support rods, each of the pair of support rods extending in a second direction, the pair of support rods being located below the first stencil support and second stencil support, and each of the pair of support rods comprising:
• a first connecting part, the first connecting part being connected to the printer;
• a second connecting part, the second connecting part being connected to the printer;
• a main body part, the main body part being located between the first connecting part and the second connecting part in an axial direction of the support rod, and removably connected to the first connecting part and the second connecting part, so that the main body part can be connected to or separated from the printer, the main body part including a first end and a second end provided with a first engagement part and a second engagement part, respectively;
• wherein the main body part is able to pass through the stencil mounting space and thereby be withdrawn from above the first stencil support and second stencil support, and the pair of support rods can be driven to rotate,
• wherein one end of the first connecting part is provided with a first mating part, and one end of the second connecting part is provided with a second mating part, the first engagement part can mate with the first mating part, and the second engagement part can mate with the second mating part, to limit rotation of the main body part relative to the first connecting part or the second connecting part, and
• wherein the first engagement part is at least one recess formed in such a way as to be sunk inward from an end face of the first end of the main body part, the second engagement part is at least one recess formed in such a way as to be sunk inward from an end face of the second end of the main body part, the first mating part is at least one protrusion formed in such a way as to protrude outward from an end face of one end of the first connecting part, the second mating part is at least one protrusion formed in such a way as to protrude outward from an end face of one end of the second connecting part, and at least one protrusion of each of the first mating part and the second mating part can enter at least one corresponding recess of the first engagement part and the second engagement part of the main body part, thereby limiting rotation of the main body part relative to the first connecting part or the second connecting part.