초록 ▼

An anti-theft device, comprising at least one spool ( 2) made of electrically insulating material that is mounted rotatably on a support (3); a cable-like element (4) that can be wound onto, and unwound from, the spool or a respective spool and has a free end (5) that can be detachably anchored to a

An anti-theft device, comprising at least one spool ( 2) made of electrically insulating material that is mounted rotatably on a support (3); a cable-like element (4) that can be wound onto, and unwound from, the spool or a respective spool and has a free end (5) that can be detachably anchored to an item (6) to be restrained, elastic loading means for the or each spool in order to ensure the automatic tensioning and rewinding of said cable-like element on its own spool, detachable engagement means for an item to be restrained which are located at the free end of said cable-like element or of each cable-like element and are suitable to open or close an electrical contact, and a control unit (8) that is meant to act in response to the opening-closing of the electrical contact.

대표청구항 ▼

The invention claimed is: 1. An anti-theft device; comprising at least one spool made of electrically insulating material that is mounted rotatably on a support; at least one cable that can be wound onto, and unwound from, said spool or a respective spool and has a free end that can be detachably a

The invention claimed is: 1. An anti-theft device; comprising at least one spool made of electrically insulating material that is mounted rotatably on a support; at least one cable that can be wound onto, and unwound from, said spool or a respective spool and has a free end that can be detachably anchored to an item to be restrained, elastic loading means for the or each spool in order to ensure the automatic tensioning and rewinding of said cable on its own spool, detachable engagement means for an item to be restrained which is located at said free end of said cable or of each cable and is suitable to open or close an electrical contact, and a control unit that is meant to act in response to the opening-closing of said electrical contact, wherein said detachable engagement means comprises a clamping element having two clamping jaws which are mutually articulated in order to pass from an engagement condition, in which said portion of said cable can move with respect to a first end, to a restraining condition, in which said portion of said cable is in a locking position and said electrical contact is closed. 2. The device according to claim 1, wherein said cable has a high pulling strength and comprises two conducting wires, which end, at the free end of said cable, with a respective mutual engagement means. 3. The device according to claim 2, wherein each conducting wire of said cable comprises a plurality of strands having a very small diameter and an insulation and protection sheath. 4. The device according to claim 1, wherein said cable, said elastic loading means, said detachable engagement means and said control unit constitute an electric circuit that can be opened/closed at said detachable engagement means. 5. The anti-theft device according to claim 1, wherein said conducting wires are connected to a first one of said two jaws. 6. The anti-theft device according to claim 5, wherein said portion of said cable, in the restraining condition, is at least partially associated with a closure lamina that is slidingly coupled to a second jaw, a sliding of said portion of said cable suitable to widen said restraining loop producing a sliding of said lamina and the opening of said electrical contact. 7. The anti-theft device according to claim 6, wherein said lamina comprises, at the face that is meant to face said first jaw, a stud for engaging a button, formed on said second jaw, for closing said electrical contact. 8. The anti-theft device according to claim 7, further comprising elastic means that are interposed between said lamina and said second jaw, act along a direction that is substantially parallel to the direction of the sliding of said lamina with respect to said second jaw, and are meant to keep said lamina, in the restraining condition, in the position for closing said electrical contact. 9. The device according to claim 1, wherein said first jaw comprises, at the surface meant to abut against the second jaw, in the engagement condition, a button that is meant to close, in case of engagement with said second jaw, said electrical contact between said two conducting wires. 10. The device according to claim 1, wherein said second jaw comprises, at the surface that is meant to engage said first jaw, a slot that is meant, in the restraining condition, to accommodate said portion of said cable. 11. The device according to claim 1, wherein said surface meant to engage said second jaw, in the restraining condition, comprises means for adjusting the distance from said second jaw. 12. The device according to claim 1, wherein said adjustment means comprise a screw. 13. The device according to claim 1, wherein said first jaw and said second jaw comprise mutual engagement means that is suitable to lock said clamping element in the restraining condition. 14. The device according to claim 13, wherein said mutual engagement means comprises an engagement tooth that is arranged on said second jaw and a locator arranged at said first jaw. 15. The anti-theft device according to claim 1, wherein an adhesive tab is associated with said clamping element. 16. The anti-theft device according to claim 1, wherein said detachable engagement means comprises an indicator that is suitable to indicate operating anomalies. 17. The anti-theft device according to claim 16, wherein said indicator comprises a LED. 18. The device according to claim 1, wherein said loading means comprise a single spring that can be accommodated in an internal cavity of said spool and is in sliding electrical contact with two terminals that are electrically connected to said control unit. 19. The device according to claim 1, wherein said loading means comprise two coiled springs that can be accommodated in a respective seat provided inside said spool, each spring having one end electrically connected to a conductor of said cable and the other end connected electrically without sliding to said control unit. 20. The device according to claim 1, wherein said control unit comprises remote transmission means for activating a remote signaling or alarm system. 21. The device according to claim 1, wherein said spool rotates around a shaft supported by a supporting bracket that can be fixed to a support. 22. The device according to claim 21, wherein said support is constituted by a stand that comprises a rear supporting portion and a front that can be applied with a snap action to the rear portion, so as to delimit a compartment for containing one or more spools for winding-unwinding a respective cable. 23. The device according to claim 22, wherein said front comprises a bush for the passage of the or each cable, said bush also acting as a support for an item to be displayed. 24. The device according to claim 21, wherein said support comprises a plurality of columns arranged side by side. 25. The device according to claim 21, wherein said support has a star-like configuration. 26. An anti-theft device, comprising at least one flexible cable provided with two conducting wires that are connected, at a first end, to means for detachable engagement with at least one item to be restrained and are suitable to open or close an electrical contact between said two conducting wires and are connected, at their other end, to a control unit that is meant to act in response to the opening/closure of said electrical contact, a removable engagement means comprising a clamping element for locking, with respect to said first end, a portion of said cable in order to form a restraining loop, wherein said clamping element comprises two clamping jaws which are mutually articulated in order to pass from an engagement condition, in which said portion of said cable can move with respect to said first end, to a restraining condition, in which said portion of said cable is in a locking position and said electrical contact is closed. 27. The device according to claim 26, wherein said flexible cable has a high pulling strength and comprises two conducting wires, which end, at the free end of said cable, with a respective mutual engagement means. 28. The device according to claim 27, wherein each conductor of said cable comprises a plurality of strands having a very small diameter and an insulation and protection sheath. 29. The anti-theft device according to claim 26, wherein said conducting wires are connected to a first one of said two jaws. 30. The anti-theft device according to claim 26, wherein said portion of said cable, in the restraining condition, is at least partially associated with a closure lamina that is slidingly coupled to a second jaw, a sliding of said portion of said cable suitable to widen said restraining loop producing a sliding of said lamina and the opening of said electrical contact. 31. The anti-theft device according to 30, wherein said lamina comprises, at the face that is meant to face said first jaw, a stud for engaging a button, formed on said second jaw, for closing said electrical contact. 32. The anti-theft device according to claim 30, further comprising elastic means that are interposed between said lamina and said second jaw, act along a direction that is substantially parallel to the direction of the sliding of said lamina with respect to said second jaw, and are meant to keep said lamina, in the restraining condition, in the position for closing said electrical contact. 33. The anti-theft device according to claim 26, wherein said detachable engagement means comprises an indicator that is suitable to indicate operating anomalies. 34. The anti-theft device according to claim 33, wherein said indicator comprises a LED. 35. The anti-theft device according to 26, wherein an adhesive tab is associated with said clamping element. 36. The device according to claim 29, wherein said first jaw comprises, at the surface meant to abut against the second jaw, in the engagement condition, a button that is meant to close, in case of engagement with said second jaw, said electrical contact between said two conducting wires. 37. The device according to 36, wherein said second jaw comprises, at the surface that is meant to engage said first jaw, a slot that is meant, in the restraining condition, to accommodate said portion of said cable. 38. The device according to claim 37, wherein said surface meant to engage said second jaw, in the restraining condition, comprises means for adjusting the distance from said second jaw. 39. The device according to claim 38, wherein said adjustment means comprise a screw. 40. The device according to claim 36, wherein said first jaw and said second jaw comprise mutual engagement means that is suitable to lock said clamping element in the restraining condition. 41. The device according to claim 40, wherein said mutual engagement means comprises an engagement tooth that is arranged on said second jaw and a locator arranged at said first jaw. 42. An anti-theft device, comprising at least one spool made of electrically insulating material that is mounted rotatably on a support; at least one cable having two conductors that can be wound onto, and unwound from, said spool or a respective spool and has a free end that can be detachably anchored to an item to be restrained, elastic loading means for the or each spool in order to ensure the automatic tensioning and rewinding of said cable on its own spool, detachable engagement means for an item to be restrained which is located at said free end of said cable or of each cable and is suitable to open or close an electrical contact, and a control unit that is meant to act in response to the opening-closing of said electrical contact, wherein said detachable engagement means comprises an elastically loaded telescopic tube, which has a transverse seat that acts as a socket for accommodating a plug and is electrically connected to a conductor of said cable, and a plug that can be inserted in said socket, is electrically connected to the other conductor of said cable, and has a head for abutment against the passage of said telescopic tube. 43. The device according to claim 42, wherein said cable has a high pulling strength and comprises two conducting wires, which end, at the free end of said cable, with a respective mutual engagement means. 44. The device according to claim 43, wherein each conductor of said cable comprises a plurality of strands having a very small diameter and an insulation and protection sheath. 45. The device according to claim 42, wherein said cable, said elastic loading means, said detachable engagement means and said control unit constitute an electric circuit that can be opened/closed at said detachable engagement means. 46. The device according to claim 42, wherein said loading means comprise a single spring that can be accommodated in an internal cavity of said spool and is in sliding electrical contact with two terminals that are electrically connected to said control unit. 47. The device according to claim 42, wherein said loading means comprise two coiled springs that can be accommodated in a respective seat provided inside said spool, each spring having one end electrically connected to a conductor of said cable and the other end connected electrically without sliding to said control unit. 48. The device according to claim 42, wherein said control unit comprises remote transmission means for activating a remote signaling or alarm system. 49. The device according to claim 42, wherein said spool rotates around a shaft supported by a supporting bracket that can be fixed to a support. 50. The device according to claim 49, wherein said support is constituted by a stand that comprises a rear supporting portion and a front that can be applied with a snap action to the rear portion, so as to delimit a compartment for containing one or more spools for winding-unwinding a respective cable. 51. The device according to claim 50, wherein said front comprises a bush for the passage of the or each cable, said bush also acting as a support for an item to be displayed. 52. The device according to claim 49, wherein said support comprises a plurality of columns arranged side by side. 53. The device according to claim 49, wherein said support has a star-like configuration.