A baler comprising: - a bale chamber; - a plunger configured to compress crop material in said bale chamber in order to form a bale; - a needle yoke rotatable around a fixed pivot axis and comprising a plurality of needles configured to deliver twine through said bale chamber; - a plurality of knotters configured to receive the twine from said plurality of needles; - a driving shaft located above the bale chamber and extending in a traverse direction of the baler; - a needle coupling device configured to convert a rotation of the driving shaft into a movement of the needle yoke from a rest position to a twine delivery position and back, the needle coupling device comprises: ∘ a crank arm attached to the driving shaft and co-rotating with the driving shaft; ∘ a drive rod having a first end pivotally connected to the crank arm and having a second end; ∘ a connection member pivotally mounted around said fixed pivot axis and pivotally connected at a second location to said second end of the drive rod such that rotation of the driving shaft is converted in a swinging of the connection member around said fixed pivot axis, the swinging corresponding to said movement of the needle yoke; characterised in that said connection member being formed cooperatively with said needle yoke by providing: - a shearbolt adapted to transfer a force from the connection member to said needle yoke during a movement from the rest position to the twine delivery position wherein the shearbolt is configured to break when there is an obstruction in the baling chamber; and - a protrusion, formed at one of the connection member and the needle yoke, to abut against the other one of the connection member and the needle yoke for transferring a force to move a needle support arm of the needle yoke during a movement from the twine delivery position to the rest position. - a bale chamber; - a plunger configured to compress crop material in said bale chamber in order to form a bale; - a needle yoke rotatable around a fixed pivot axis and comprising a plurality of needles configured to deliver twine through said bale chamber; - a plurality of knotters configured to receive the twine from said plurality of needles; - a driving shaft located above the bale chamber and extending in a traverse direction of the baler; - a needle coupling device configured to convert a rotation of the driving shaft into a movement of the needle yoke from a rest position to a twine delivery position and back, the needle coupling device comprises: ∘ a crank arm attached to the driving shaft and co-rotating with the driving shaft; ∘ a drive rod having a first end pivotally connected to the crank arm and having a second end; ∘ a connection member pivotally mounted around said fixed pivot axis and pivotally connected at a second location to said second end of the drive rod such that rotation of the driving shaft is converted in a swinging of the connection member around said fixed pivot axis, the swinging corresponding to said movement of the needle yoke; ∘ a crank arm attached to the driving shaft and co-rotating with the driving shaft; ∘ a drive rod having a first end pivotally connected to the crank arm and having a second end; ∘ a connection member pivotally mounted around said fixed pivot axis and pivotally connected at a second location to said second end of the drive rod such that rotation of the driving shaft is converted in a swinging of the connection member around said fixed pivot axis, the swinging corresponding to said movement of the needle yoke; - a shearbolt adapted to transfer a force from the connection member to said needle yoke during a movement from the rest position to the twine delivery position wherein the shearbolt is configured to break when there is an obstruction in the baling chamber; and - a protrusion, formed at one of the connection member and the needle yoke, to abut against the other one of the connection member and the needle yoke for transferring a force to move a needle support arm of the needle yoke during a movement from the twine delivery position to the rest position.