1. A power failure detection circuit of a switching source, comprising:
a switching element;
a control circuit of the switching element, and
a photocoupler comprising;
a light emitting diode located at a primary side of a transformer, the light emitting diode being serially connected to the control circuit, a cathode of the light emitting diode being connected to a capacitor; and
a phototransistor located at a secondary side of the transformer, for detecting a power failure of an alternating current source, wherein a charging current flowing into the capacitor is used as a detection current for detecting the power failure of the alternate current source.
2. The power failure detection circuit according to claim 1, wherein the cathode of the light emitting diode is connected to the control circuit of the switching element via a starting element.
3. The power failure detection circuit according to claim 2, wherein the starting element is a resistor.
4. The power failure detection circuit according to claim 2, wherein the starting element is a constant current circuit or a constant current element.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. System of delivering a liquid to a pasty product, designed to be installed at an open end of a packaging element constituted by one of a flexible tube and a small bottom on which a user acts by manual pressure to cause the product to come out via integrated openingclosing means, wherein the system comprises:
a base element formed by a hollow body that is attached at an open end of a tube and comprises a window associated with a movable strip of substantially matching shape and dimensions that can be moved in opening by pressure of the product, during a pressing action on the tube, to be returned automatically to an initial closed position when the pressure ceases or diminishes, and
a cap designed to cover the base element at least in a top part comprising the window and the strip, and comprising an internal recess opposite the strip, of dimensions at least matching those of the strip and of such a depth as to allow a deflection in opening of the strip and consequently a receipt of the product in said recess, then its routing toward an outlet hole made in a top zone of the cap.
2. A delivery system according to claim 1, wherein the window associated with the strip is made on a periphery of a hollow body of the base element.
3. A delivery system according to claim 1, wherein the window associated with the strip is made on a top plane of a hollow body of the base element.
4. A delivery system according to claim 1, wherein the strip is locked in closure by moving the cap until the recess is no longer opposite the cap.
5. A delivery system according to claim 1, wherein the window of the base element is rectangular, the movable strip blocking the window off in closure is fixedly attached to a top side of said window by means of an articulation, the recess of the cap is made over a whole height of the strip in order to allow an angular deflection in opening of the strip, along a vertical plane.
6. A delivery system according to claim 1, wherein the window of the base element is rectangular, the movable strip blocking the window off in closure originates directly from a top side of said window, in order to render it elastically deformable for an angular deflection in opening, along a vertical plane.
7. A delivery system according to claim 1, wherein the window of the base element is rectangular, the movable strip blocking the window off in closure is fixedly attached to one lateral side of said window by means of an articulation, the recess of the cap is made over a whole width of a strip in order to allow an angular deflection of the strip in opening, along a horizontal plane.
8. A delivery system according to claim 1, wherein the window of the base element is rectangular, the movable strip blocking the window off in closure originates directly from one lateral side of said window, in order to render it elastically deformable for an angular deflection in opening, along a horizontal plane.
9. A delivery system according to claim 1, wherein the base element comprises a transit chamber for the product, made close to the window with which it communicates via a chicane made on a separating rib, a chamber also in communication with an outlet hole made on a top part of the cap, in line with an internal recess of the cap, whose height is substantially equal to that of the window and whose width is substantially equal to a sum of the width of the same window and the width of the transit chamber.
10. A delivery system according to claim 9, wherein the cap and the base element comprise matching indexation means consisting respectively of a finger originating from an outer periphery of a bottom collar of the cap, capable of deflecting in rotation into a matching indentation, made on an outer periphery of a top collar of the base element, and maximum positions of the finger in the indentation corresponding to an opening or a closure.
11. A delivery system according to claim 9, wherein the cap and the base element comprise matching indexation means consisting of arrows placed on said cap and said base element, to be placed opposite one another, depending on whether a user wishes to obtain an opening or a closure of the system.
12. A delivery system according to claim 1, wherein the base element comprises, in an inner central zone, a perforating element designed to pierce a lid of the tube.
13. A delivery system according to claim 1, wherein the base element comprises, on its bottom periphery, a tear-off anti-tamper band connected with a neck of the tube.
14. A delivery system according to claim 1, wherein a locking ring is interposed between the base element and the tube in order to prevent any attempt at piercing by screwing.
15. A delivery system according to claim 1, wherein the base element is screwed onto the tube.
16. A delivery system according to claim 1, wherein the base element is snapped onto the tube.
17. A delivery system according to claim 1, wherein the cap is clipped onto the base element.
18. A delivery system according to claim 1, wherein the base element, furnished with the cap which is fixedly attached thereto, is protected by a removable top.
19. A packaging element which comprises an anti-seepage delivery system according to claim 1.