Exercise apparatus and assemblies facilitating removable attachment of a resistance device to an exercise apparatus

1. An exercise apparatus comprising:

a resistance mechanism configured to resist an exercise motion undertaken by a user of the exercise apparatus;

a rotatable pulley member;

a pulley cable having a first end portion coupled to the resistance mechanism and a second end portion coupled to the rotatable pulley member;

a user operable member that is operably coupled to the rotatable pulley member such that movement of the user operable member during the exercise motion rotates the rotary pulley member and thereby pulls on the pulley cable, which in turn is resisted by the resistance mechanism; and

a plunger device facilitating coupling and uncoupling of the pulley cable to and from the rotatable pulley member, wherein the plunger device is movable into a first position in which the pulley cable is coupled to the rotatable pulley member and into a second position in which the pulley cable is uncoupled from the rotatable pulley member, wherein the second end portion of the pulley cable comprises an enlarged end having a larger width than the pulley cable; and wherein the enlarged end is engaged with the plunger device in the first position and wherein the enlarged end is disengaged from the plunger device in the second position.

2. The exercise apparatus according to claim 1 , wherein the plunger device comprises a plunger body and a biasing device that biases the plunger body into the first position.

3. The exercise apparatus according to claim 2 , wherein the plunger body comprises a keyhole aperture having a first end through which the enlarged end of the pulley cable is free to pass and a second end through which the enlarged end of the pulley cable cannot pass.

4. The exercise apparatus according to claim 3 , wherein the plunger body comprises a rear surface that engages with the enlarged end of the pulley cable in the first position and a front surface located opposite the rear surface.

5. The exercise apparatus according to claim 4 , wherein the rear surface is located in a cavity formed in the plunger body, such that the enlarged end of the pulley cable is located in the cavity when the pulley cable is coupled to the rotatable pulley member.

6. The exercise apparatus according to claim 3 , wherein the keyhole aperture comprises a funnel portion located between the first end and second end of the keyhole aperture, the funnel portion comprising opposing first and second tapered sides that taper inwardly towards each other from the first end of the keyhole aperture to the second end of the keyhole aperture.

7. The exercise apparatus according to claim 6 , wherein the first and second tapered sides are non-symmetrical with respect to a center axis extending through first and second ends of the keyhole aperture.

8. The exercise apparatus according to claim 6 , wherein the first tapered side has a narrower edge than the second tapered side.

9. The exercise apparatus according to claim 6 , wherein the first tapered side is tapered at a greater angle from the first end of the keyhole aperture to the second end of the keyhole aperture compared to the second tapered side.

10. The exercise apparatus according to claim 2 , wherein the plunger body is disposed in an elongated cavity in the rotatable pulley member and wherein the plunger body is biased towards a first end of the elongated cavity by the biasing device and movable towards a second end of the elongated cavity against the bias of the biasing device.

11. The exercise apparatus according to claim 10 , wherein the rotatable pulley member comprises a pair of opposing cam plates and wherein the elongated cavity is defined between the pair of opposing cam plates.

12. The exercise apparatus according to claim 11 , further comprising a radial groove extending from an outer edge of the pair of cam plates to the elongated cavity, the radial groove facilitating actuation of the plunger body by a manual tool to move the plunger body into the second position, wherein the biasing device biases the plunger body back towards the first position.

13. The exercise apparatus according to claim 11 , wherein the plunger body comprises a post that radially extends through an elongated slot formed in one of the pair of opposing cam plates, wherein the post is manually movable in the elongated slot to thereby move the plunger body into the second position, and wherein the biasing device biases the plunger body back towards the first position.

14. The exercise apparatus according to claim 2 , wherein the biasing device comprises a spring.

15. The exercise apparatus according to claim 14 , wherein the spring is a compression spring having a first end engaged with the plunger body and a second end engaged with the rotatable pulley member.

16. An assembly for attaching a resistance mechanism to an exercise apparatus, the assembly comprising:

a pulley cable having a first end portion for being coupled to the resistance mechanism and a second end portion for being coupled to the exercise apparatus; and

a plunger device facilitating coupling and uncoupling of the pulley cable to and from the exercise apparatus;

wherein the plunger device is movable into a first position relative to the exercise apparatus and in which the plunger device couples the pulley cable to the exercise apparatus, and the plunger device being movable into a different, second position in which the plunger device uncouples the pulley cable from the exercise apparatus, wherein:

the second end portion of the pulley cable comprises an enlarged end having a larger width than the pulley cable; and wherein the enlarged end is engaged with the plunger device in the first position and wherein the enlarged end is disengaged from the plunger device in the second position;

the plunger device comprises a plunger body that extends from front to back in an axial direction, from a first end to a second end in a longitudinal direction that is perpendicular to the axial direction, and from a first side to a second side in a transverse direction that is perpendicular to the axial direction and perpendicular to the longitudinal direction; and

the plunger body comprises a keyhole aperture axially extending through the plunger body, the keyhole aperture comprising a first end through which the enlarged end of the pulley cable is free to pass and a second end through which the enlarged end of the pulley cable cannot pass.

17. The assembly according to claim 16 , wherein:

the keyhole aperture comprises a funnel portion located between the first end and second end of the keyhole aperture, the funnel portion comprising opposing first and second tapered sides that taper inwardly towards each other from the first end of the keyhole aperture to the second end of the keyhole aperture; and

the first and second tapered sides are non-symmetrical with respect to a longitudinal center axis extending through first and second ends of the keyhole aperture.

18. The exercise apparatus according to claim 17 , wherein the first tapered side has a narrower edge than the second tapered side.