Multi-position adjustable height seat post
A multi-position adjustable height seat post comprises an inner tube, an outer tube, a locking assembly, a triggering device, a first extending element, and a second extending element disposed between the tubes. The locking assembly comprises an actuating unit, a plurality of parallel grooves located in the outer tube, a plurality of spherical detent elements located, in the grooves, and a plurality of spherical elements located in the inner tube. The triggering device connects to the actuating unit. The first extending element constantly pushes the to actuating unit moving in a first direction. The second extending element disposes between the tubes. Once the triggering device is triggered, the actuating unit moves in a second direction contrary to the first direction and makes the spherical elements to move inward laterally to let the inner tube and outer tube move relative to each other freely.
1. A multi-position adjustable height seat post comprising:
an inner tube,
an outer tube, movably connected to the inner tube,
a locking assembly, comprising an actuating unit, a plurality of parallel grooves located in the outer tube, a plurality of spherical detent elements located in the grooves, and a plurality of spherical elements located in the inner tube between the actuating unit and the outer tube,
a triggering device, connected to the actuating unit,
a first extending element, constantly applying a force to push the actuating unit moving in a first direction; and
a second extending element, acting between the inner and outer tubes,
wherein once the triggering device is triggered, the actuating unit moves in a second direction contrary to the first direction and makes the spherical elements move inward laterally to let the inner tube and outer tube move relative to each other freely.
2. The multi-position adjustable height seat post as claimed in claim 1 , wherein the triggering device is a cable connected to the actuating unit.
3. The multi-position adjustable height seat post as claimed in claim 1 , wherein the triggering device is a push rod connected to the actuating unit.
4. The multi-position adjustable height seat post as claimed in claim 1 , wherein the actuating unit includes an actuating element and a locking element.
5. The multi-position adjustable height seat post as claimed in claim 4 , wherein the locking element contains a first ramp section, a second ramp section and an accommodated room which is formed below the second ramp section, the first ramp section is steeper than the second ramp section, when the triggering device is triggered, the spherical elements move from the first ramp section through the second ramp section into the accommodated room.
6. The multi-position adjustable height seat post as claimed in claim 1 , wherein the second extending element includes a valve and a compression room, the compression room is defined by the area inside the inner and outer tubes, the valve is configured to introduce air into the compression room.
7. The multi-position adjustable height seat post as claimed in claim 6 , wherein the first extending element is a compression spring.
8. The multi-position adjustable height seat post as claimed in claim 1 , wherein the outer tube consists of an inner sleeve and an outer sleeve, the hardness of the inner sleeve is higher than 200 Vickers Pyramid Number.
9. The multi-position adjustable height seat post as claimed in claim 6 , wherein the outer tube is split into at least two pieces to allow for manufacture of spherical detent elements and to contain air in the compression room.
10. The multi-position adjustable height seat post as claimed in claim 1 , wherein the parallel grooves are spaced apart angularly by 45°, 90°, 135° and 90°.
11. A multi-position adjustable height seat post comprising:
an inner tube,
an outer tube, movably connected to the inner tube, consists of at least one inner piece and one outer piece, the hardness of the inner piece is higher than 200 Vickers Pyramid Number.
a locking assembly, comprising an actuating unit connected to the cable, a plurality of parallel grooves located in the outer tube, a plurality of detent elements located in the grooves, and a plurality of spherical elements located in the inner tube between the actuating unit and the outer tube,
a triggering device, connected to the actuating unit,
a first extending element, constantly applying a force to push the actuating unit moving in a first direction; and
a second extending element, acting between the inner and outer tubes,
wherein once the triggering device is triggered, the actuating unit moves in a second direction contrary to the first direction and makes the spherical elements to move inward laterally to let the inner tube and outer tube move relative to each other freely.
12. The multi-position adjustable height seat post as claimed in claim 11 , wherein the triggering device is a cable connected to the actuating unit.
13. The multi-position adjustable height seat post as claimed in claim 11 , wherein the triggering device is a push rod connected to the actuating unit.
14. The multi-position adjustable height seat post as claimed in claim 11 , wherein the actuating unit includes an actuating element and a locking element.
15. The multi-position adjustable height seat post as claimed in claim 14 , wherein the locking element contains a first ramp section, a second ramp section and an accommodated room which is formed below the second ramp section, the first ramp section is steeper than the second ramp section, when the triggering device is triggered, the spherical elements move from the first ramp section through the second ramp section into the accommodated room.
16. The multi-position adjustable height seat post as claimed in claim 11 , wherein the second extending element includes a valve and a compression room, the compression room is defined by the area inside the inner and outer tubes, the valve is configured to introduce air into the compression room.
17. The multi-position adjustable height seat post as claimed in claim 16 , wherein the first extending element is a compression spring.
18. The multi-position adjustable height seat post as claimed in claim 11 , wherein the parallel grooves are spaced apart angularly by 45°, 90°, 135° and 90°.
19. The multi-position adjustable height seat post as claimed in claim 11 , wherein the shapes of the detent elements are cylindrical.
20. The multi-position adjustable height seat post as claimed in claim 11 , wherein the shapes of the detent elements are annular.