Door spindle which can be opened and closed in two directions, characterized in that it has an outer sleeve (6), a first cover part, a second cover part, an output shaft (1203), a slide column (12), a central shaft (9), a return spring (7) and a spring locking part, wherein one end of the outer sleeve (6) is provided with a
flange on which a
flange installation hole (601) is provided, and wherein the second cover part is arranged in a tubular cavity of the outer sleeve (6) located close to the
flange installation hole (601), and wherein the first cover part is arranged in a tubular cavity at the other end of the outer sleeve (6), and wherein the outer sleeve (6) is firmly connected to the first cover part and the second cover part, and wherein a first end section (9001) of the central shaft (9) projects into the inner cavity of the first cover part, and wherein the central shaft (9) and the first cover part form a fitting structure which is axially displaceable and rotates synchronously, and wherein a second end section (9002) of the central shaft (9) projects into the inner cavity of the slide column (12), and wherein the second end section (9002) is provided with a first
drive shaft (901) and a second
drive shaft (902) which are arranged opposite each other, offset upwards and downwards, wherein the slide column is provided with a first slide (1201) and a second slide (1202) which are arranged opposite each other, offset upwards and downwards, and wherein the first slide (1201) and the second slide (1202) are each V-shaped, and wherein the first
drive shaft (901) extends into the first slide (1201) and the second drive shaft (902) extends into the second slide (1202), and wherein the output shaft (1203) protrudes from the cylinder base of the slide column (12), and wherein the output shaft (1203) protrudes from the inner cavity of the second cover part, and wherein the output shaft (1203) and the slide column (12) are movably connected to the second cover part, and wherein the output shaft (1203) and the slide column (12) move only in the circumferential direction in the tubular cavity of the outer sleeve (6), and wherein the spring locking element is firmly embedded in the central section of the central shaft (9), and wherein the
assembly method of the return spring (7) consists of placing the return spring (7) on the shaft body of the central shaft (9) between the upper end face of the spring locking element and the inner end face of a non-axially moving component located above the spring locking element; and wherein the spring locking part moves axially and compresses the return spring (7) when the output shaft (1203) and the slide column (12) move circumferentially in the tubular cavity of the outer sleeve (6) and the first drive shaft (901) slides in the first slide (1201) and slides from the lowest position of the V-shape to the highest position of the V-shape and the second drive shaft (902) slides in the second slide (1202) and slides from the lowest position of the V-shape to the highest position of the V-shape.