Volatile composition dispenser with guiding mechanism
There is a volatile composition dispenser comprising a housing having a rear fram, a rupturable cartridge disposed within the housing and a button for rupturing the cartridge. The volatile composition dispenser further comprises a guiding mechanism for guiding movement of the button from a first position to a second position when the button is pressed.
1. A volatile composition dispenser comprising:
a housing comprising a rear frame having a frame opening and a longitudinal axis extending centrally within said opening;
a rupturable cartridge placed within said housing;
an inner wall extending from the frame opening, wherein the inner wall has a proximal end at a periphery of the opening and a distal end;
a push button movably disposed within the frame opening for rupturing the cartridge, wherein the push button includes a button body and is axially movable along and rotatable about the longitudinal axis at a rotation angle, β(degrees);
a cam guide disposed on the inner wall or the button body, wherein the cam guide comprises a cam angle, α(degrees) relative to a cylindrical axis of the inner wall or the button body, wherein α>β; and
a protrusion disposed on the other of the inner wall or the button body wherein the protrusion is engaged with the cam guide for simultaneously rotating the button in response to the axial movement of the button when pushed along the longitudinal axis.
2. A volatile composition dispenser according to claim 1 , wherein the protrusion comprises a curved profile for engaging the cam guide.
3. A volatile composition dispenser according to claim 1 , wherein the inner wall and the button body are substantially cylindrical, the cam guide comprising a first end and a second end, wherein a ramp is located at one of the first and second ends of the cam guide; wherein the protrusion is spaced from the ramp in a first position and abuts the ramp in a second position to limit movement of the button when pushed.
4. A volatile composition dispenser according to claim 3 , wherein the cam guide is a helical guide rail wherein the cam angle, α is defined as
α=arctan ( D 1 /D 2), wherein
D 1 =radial distance of the helical guide rail between the first and second ends;
D 2 =axial distance of the helical guide rail between the first and second ends; and
wherein α is in the range of 15° to 45°.
5. A volatile composition dispenser according to claim 4 , wherein the helical guide rail is continuous, wherein D 1 =2πr, wherein r=radius of the inner wall or the button body.
6. A volatile composition dispenser according to claim 4 , wherein the helical guide rail is discontinuous and comprises a plurality of helical tracks of substantially equivalent shape and size, wherein D 1 =2πr/(number of helical tracks), wherein r=radius of the inner wall or the button body.
7. A volatile composition dispenser according to claim 1 , wherein a ratio of the cam angle, α to the button rotation angle, β is 1.3.
8. A volatile composition dispenser according to claim 7 further comprising a plurality of the protrusions, wherein the cam guide is discontinuous and comprises a plurality of first cam tracks on the inner wall or the button body, wherein the plurality of first cam tracks are radially spaced apart on the inner wall or the button body and engage the plurality of protrusions on the other of the inner wall or button body.
9. A volatile composition dispenser according to claim 8 , wherein the cam guide comprises second cam tracks intermediate the first cam tracks, wherein the second cam tracks engage mating cam tracks on the other of the inner wall or button body.
10. A volatile composition dispenser according to claim 1 , wherein the cam guide comprises one or more cam grooves formed in the inner wall or the button body.
11. A volatile composition dispenser according to claim 1 , wherein the cam guide comprises one or more cam ribs extending radially from the inner wall or the button body.
12. A volatile composition dispenser according to claim 1 , wherein the cam guide and the button form a unitary unit.
13. A volatile composition dispenser according to claim 1 , wherein the protrusion, the inner wall and the rear frame form a unitary unit.
14. The volatile composition dispenser according to claim 1 , further comprising indicia disposed on a top of the push button.
15. A volatile composition dispenser according to claim 1 , wherein three protrusions are radially spaced apart and located at the distal end of the inner wall for engaging the cam guide to define three points of contact between the button body and the inner wall.