Anti-theft device for articles in a bag or blister pack

Abstract

The present invention relates to an anti-theft device comprising a detection component and a magnetic locking component, a movable gripper (2) and a fixed gripper (3) extending from a body (4), the movable gripper and the fixed gripper each having an inner contact surface (20, 30), and the movable gripper (2) being hingedly connected to the fixed gripper (30) for engagement by clamping at their respective contact surfaces (20, 30). The anti-theft device is characterized in that at least one of the grippers (2, 3) is provided with a metal sheet (1) having perforated micro-protrusions, the height of which is between 0.3×E and 0.8×E, where E represents the thickness of the metal sheet (1) between 0.1 mm and 0.3 mm, the micro-protrusions forming a matrix, wherein the gap between two adjacent micro-protrusions is between 0.4 mm and 0.7 mm.

Description

Technical Field

[0001] This invention relates to the field of electronic anti-theft devices that allow for the protection of self-service items in stores by means of an electromagnetic interaction component located between an element inserted into the body of the anti-theft device and a detection gate positioned at a key passage at the exit of the body to trigger an alarm when the anti-theft device passes nearby. These anti-theft devices incorporate a locking system that can be magnetically deactivated by an authorized operator.

[0002] More specifically, this invention relates to articles for protecting items encapsulated in flexible bags or thermoformed packages (blister packs) or also secured to cardboard boxes. These articles are difficult to secure with conventional anti-theft devices because they do not allow for puncture by needles as proposed by anti-theft devices for textile articles, and do not have any protrusions or recesses, which prevents the use of anti-theft devices intended, for example, for protecting bottles or cosmetics.

[0003] The solution involves clamping the item's membrane between two jaws, making it difficult to separate the anti-theft device from the item. Background Technology

[0004] To address this, a solution described in patent application US78908386 is known, which proposes an anti-theft device consisting of two parts hinged together, each having a clamping contact surface with the item to be protected. Each contact surface has a plastic coating to prevent damage to the item and is preferably provided with textured ridges or teeth that engage with each other when the two contact surfaces are clamped together and are elastically deformable when they abut against the item. These elastically deformable surfaces are insufficient to hold items such as thin bags in the locked position.

[0005] French patent FR305844 is also known, which relates to an electronic anti-theft device comprising an electronic detection component, a first part, and a second part, each part having a so-called contact surface, and the first part being movable relative to the second part by means of a hinge to engage by clamping at their respective contact surfaces. The anti-theft device is characterized in that at least one of these parts (preferably two parts) includes an abrasive coating on its contact surface in the form of a support for carrying abrasive particles. The abrasive coating is intended to be in direct contact with the object to be clamped.

[0006] Also known is patent US5647106, which describes an anti-theft system comprising: a clamp designed to attach to a small object such as a wallet, checkbook, or pocket book; and a separation tool that allows the clamp to be attached to and removed from the object. The clamp is typically U-shaped and has two clamping arms with a relatively large pressing force between them. Pads are provided on the inner surfaces of the clamping arms. At least one of these clamping arms is provided with teeth that cut into the surface of the object when the clamp is attached, attempting to slide the clamp relative to the object. An expander tool overcomes a biasing force to open the clamping arm, allowing the clamp to attach to or be removed from the object. A preferred tool is equipped with a spring that tends to hold the jaws in a nearly closed equilibrium position.

[0007] Patent application US2007 / 283729 relates to a security tag holder designed for removable attachment to clothing. The support includes a first member and a second member coupled for relative pivoting movement about a pivot axis. The first member includes a clamping region and a locking region located on opposite sides of the axis, respectively. The second member includes a second clamping region and a second locking region located on opposite sides of the pivot. The first locking region includes a recess and a fixed magnet. The second locking region includes an aperture and a movable magnet movable between an unlocked position, in which the movable magnet is received in the aperture, and in the locked position, in which the movable magnet is partially inserted into the recess and attracted by the fixed magnet. When the first and second members are pressed together to hold the clothing, the movable magnet moves from its unlocked position to its locked position to lock the first and second members, thereby preventing relative pivoting movement.

[0008] Disadvantages of existing technology

[0009] The solution proposed in patent FR305844 is unsatisfactory because, in practice, abrasive coatings are simply ineffective at preventing the removal of items such as flexible bags or cardboard. The patent states that, "surprisingly," the abrasive-coated surface provides optimal wedging of the object, but in reality, this wedging is inefficient and far from optimal for preventing object removal. In fact, the thickness of items varies from product to product, and it is impossible to find a configuration suitable for different thicknesses and types of packaging. Tolerances are provided to accommodate different thicknesses. The choice of a technique that rotatably hinges the two bodies together results in a severe lack of angular positioning of the abrasive surface when it contacts the product to be secured. The locking is insufficient to prevent removal by simply pulling on the item in a direction parallel to the plane of the abrasive surface. If the tolerances are reduced, some thin items will escape directly without any holding, and thick items will prevent the grippers from closing.

[0010] Additionally, when using vacuum bags, the hard particles of the abrasive coating can leave indentations on plastic materials and trigger very harmful fracture initiation points.

[0011] Finally, the abrasive material formed by the support that carries the abrasive particles uses binders and material particles that are generally incompatible with food applications.

[0012] The solution provided by this invention

[0013] To overcome these shortcomings, the present invention relates to an anti-theft device designed for protecting articles in plastic film or blister packs, the anti-theft device having the features set forth in claim 1.

[0014] The anti-theft device includes a detection component and a magnetic locking component, a movable gripper and a fixed gripper, each having an inner contact surface. The movable gripper is hinged to the fixed gripper for engagement by clamping at their respective contact surfaces. Bringing the two grippers together perpendicular to their contact surfaces allows for optimal pressure on the surface of the embossed metal plate positioned on the grippers.

[0015] According to a preferred variant, at least one of the grippers (advantageously, two grippers) is provided with a metal sheet (1) having perforated micro-protrusions, the height of which is between 0.3×E and 0.8×E, where E represents the thickness of the metal sheet, which is between 0.1 mm and 0.3 mm, the micro-protrusions forming a matrix, wherein the distance between two adjacent micro-protrusions is between 0.4 mm and 0.7 mm.

[0016] Advantageously, both the movable gripper and the fixed gripper are provided with a metal plate having perforated micro-protrusions.

[0017] Preferably, the movable gripper engages with a pivot lever, which is hinged relative to the fixed gripper via an axis and to the movable gripper via an eccentric axis that interacts with the slot.

[0018] This lever allows for the amplification of the fastening force applied by the user when installing the anti-theft device.

[0019] Equipped with micro-protruding metal sheets that meet 304L stainless steel food standards (commonly used in kitchen accessories due to its high corrosion resistance).

[0020] According to one variation, the body is traversed by a groove.

[0021] The lever (5) has a groove that leads to the groove in the body when the lever is in the locked position. According to the variant: a) The contact surfaces move relative to each other in the lateral direction between the first position and the second position. b) Each of the contact surfaces has a complementary profile formed by alternating protruding and recessed areas. c) The profile is configured such that when the gripper is in the clamping position... a. When the contact surface is positioned in the first position, the top of the protruding area of ​​the contact surface makes contact. b. When the contact surface is positioned in the second position, the top of the protruding area of ​​the contact surface contacts the bottom of the recessed area.

[0022] Advantageous: -The contact surface can move laterally according to the first position and the second position; -The fixed gripper and the movable gripper are hinged relative to the pivot axis at the following positions: a) Locked position, in which the two contact surfaces (20, 30) come together and are locked by a magnetic locking component until the magnetic locking component is deactivated; b) Insertion position, in which the two contact surfaces (20, 30) are separated; - The complementary profile has teeth that form protruding areas, and these teeth are spaced apart at a constant pitch by grooves that form recessed areas; - The width of the tooth is less than the width of the groove.

[0023] Detailed description of the non-restrictive implementation scheme

[0024] The invention will be better understood by reading the following description, which relates to non-limiting embodiments illustrated in the accompanying drawings, in which: [ Figure 1 ] Figure 1 A perspective view of the anti-theft device according to the invention in the unlocked position is shown.

[0025] [ Figure 2 ] Figure 2 A cross-sectional view of the anti-theft device according to the invention in the locked position is shown.

[0026] [ Figure 3 ] Figure 3 A cross-sectional view of the front portion of the unlocking anti-theft device according to the present invention is shown.

[0027] [ Figure 3A ] Figure 3A A cross-sectional view of the front portion of the unlocking anti-theft device according to the present invention is shown.

[0028] [ Figure 3B ] Figure 3B A cross-sectional view of the front portion of a locking anti-theft device according to the present invention is shown.

[0029] [ Figure 4 ] Figure 4 A partial cross-sectional view of the anti-theft device according to the present invention is shown.

[0030] [ Figure 5 ] Figure 5 A perspective view of an anti-theft device according to the present invention attached to an item to be protected is shown.

[0031] [ Figure 6 ] Figure 6 A perspective view of a variant of the anti-theft device according to the invention in the unlocked position is shown.

[0032] [ Figure 7 ] Figure 7 A perspective view of a variant of the anti-theft device according to the invention in the locked position is shown.

[0033] [ Figure 8 ] Figure 8 A cross-sectional view of the front portion of a variant of the anti-theft device according to the invention, locked in the second position, is shown.

[0034] [ Figure 9 ] Figure 9 A perspective view of the first part of a variation of the anti-theft device according to the present invention is shown.

[0035] [ Figure 10 ] Figure 10 A perspective view of the second part of a variation of the anti-theft device according to the present invention is shown.

[0036] [ Figure 11 ] Figure 11A partial cross-sectional view of a variant of the anti-theft device according to the invention in the unlocked position is shown.

[0037] [ Figure 12 ] Figure 12 A partial cross-sectional view of a variant of the anti-theft device according to the invention in the locked position is shown.

[0038] [ Figure 13 ] Figure 13 A three-quarters perspective view of the front portion of another variation of the anti-theft device according to the invention in the unlocked position is shown.

[0039] [ Figure 14 ] Figure 14 A side view of this variant of the anti-theft device according to the invention in the unlocked position is shown.

[0040] [ Figure 15 ] Figure 15 A detailed diagram of this variant of the anti-theft device according to the invention in the locked position is shown.

[0041] [ Figure 16 ] Figure 16 A perspective view of another variation of the anti-theft device according to the invention in the locked position is shown.

[0042] [ Figure 16a ] Figure 16a A partial cross-sectional view of a variant of the anti-theft device according to the invention in the open position is shown.

[0043] [ Figure 17 ] Figure 17 A perspective view of another variation of the anti-theft device according to the invention in the locked position is shown, the anti-theft device having a fastening bow-shaped member.

[0044] [ Figure 18 ] Figure 18 A partial cross-sectional view of an alternative embodiment of the anti-theft device according to the invention in the locked position is shown, the anti-theft device having a fastening bow-shaped member.

[0045] [ Figure 19 ] Figure 19 A perspective view of a variant of the anti-theft device according to the invention in the open position is shown, the anti-theft device being equipped with a sensor.

[0046] [ Figure 20 ] Figure 20 A perspective view of a variant of the anti-theft device according to the invention in the open position is shown.

[0047] [ Figure 21 ] Figure 21A perspective view of a variation of the anti-theft device according to the invention in a partially closed position is shown.

[0048] [ Figure 22 ] Figure 22 A perspective view of a variant of the anti-theft device according to the invention in the locked position is shown.

[0049] [ Figure 23 ] Figure 23 A perspective view of a micro-perforated metal sheet for an anti-theft device according to the invention in the locked position is shown.

[0050] [ Figure 24 ] Figure 24 A perspective view of a modified gripper of the anti-theft device according to the invention in the locked position is shown.

[0051] [ Figure 25 ] Figure 25 A perspective view of a variant of the anti-theft device according to the invention in the open position is shown.

[0052] [ Figure 26 ] Figure 26 A perspective view is shown of the protected goods together with a variant of the anti-theft device according to the invention in the locked position.

[0053] [ Figure 27 ] Figure 27 A perspective view of a variant of the anti-theft device according to the invention in the open position is shown.

[0054] [ Figure 28 ] Figure 28 A perspective view of a variant of the anti-theft device according to the invention in the locked position is shown.

[0055] [ Figure 29 ] Figure 29 A perspective view of a variant of the anti-theft device according to the invention in the locked position is shown, the anti-theft device being used to attach to a pole.

[0056] [ Figure 30 ] Figure 30 A perspective view of a variant of the anti-theft device according to the invention in the open position is shown.

[0057] [ Figure 31 ] Figure 31 A three-quarters perspective view of the front portion of a variant of the anti-theft device according to the invention in the locked position is shown.

[0058] [ Figure 32 ] Figure 32 A three-quarters perspective view of the rear portion of a variant of the anti-theft device according to the invention in the locked position is shown.

[0059] The principle of this invention

[0060] This invention relates to theft protection for articles encapsulated in blister packs, bags, or fixed to cardboard, particularly food products requiring specific anti-theft devices that do not puncture the packaging (especially when the packaging is under vacuum) to ensure an airtight seal and compatibility with the food without contaminating it with particles detached from the abrasive surface due to moisture and / or the deterioration / disintegration of the support holding the abrasive particles.

[0061] Therefore, according to the present invention, at least one of the grippers (2, 3) for holding an article is provided with a metal sheet (1) having perforated micro-protrusions, the height of which is between 0.3×E and 0.8×E, where E specifies the thickness of the metal sheet (1) between 0.1 mm and 0.3 mm, the micro-protrusions forming a matrix, wherein the distance between two adjacent micro-protrusions is between 0.4 mm and 0.7 mm.

[0062] These open microprotrusions are of similar height and slightly thinner than the plastic film. They are used to surface-press the film based on an array of microprotrusions formed on the surface of the metal sheet (1). These protrusions have a truncated conical shape and extend substantially cylindrically in the direction perpendicular to the film inserted between the grippers around the perforated lip, so as to hold the film in place under tension in the direction of the plane of the grippers.

[0063] Such sheets with perforated microprotrusions are used, for example, in the production of callus files. These sheets typically have a thickness of 200 micrometers, with a matrix of truncated conical perforated microprotrusions formed on the surface of the sheet, for example by embossing, the perforated microprotrusions having a height of approximately 100 micrometers. The bases of these microprotrusions are punctured by tearing during sheet deformation or by laser or other puncture methods.

[0064] The perforated micro-protrusions form a regular or random matrix. The center-to-center distance between two adjacent perforated micro-protrusions is less than one millimeter, typically 400 to 700 micrometers.

[0065] The sheet is preferably made of austenitic stainless steel, typically 304 stainless steel.

[0066] The gripper may be provided with a single piece covering most of the contact surface, or it may be formed by a strip fixed to the contact surface of the gripper.

[0067] The solution relating to the use of a non-deformable metal sheet (1), which is the subject of this invention, allows roughness to be provided by deformation of the metal without the addition of particles. This method of forming roughness makes the component extremely wear-resistant and avoids the problems of the solution proposed in patent FR305844, which involves the use of a woven support with added abrasive particles (a support with a limited lifespan in humid environments). The fabric will break due to the problematic particle strength, especially in the presence of food products.

[0068] First variant implementation plan

[0069] Depend on Figures 1 to 5 The first variant implementation scheme is illustrated. (By...) Figures 6 to 10 A second variant embodiment is illustrated. The main difference between the two variants is that, in the second variant, one of the grippers is laterally movable to allow for switching between a first spacing of the grippers in the locked position and a second spacing of the grippers in the locked position using the same means, so as to allow for adaptation to the film thickness of the article to be protected.

[0070] Reference Figure 4 Description of alternative implementation schemes

[0071] The following will refer to Figure 4 The anti-theft device is described as a non-limiting example of an embodiment of the invention. The anti-theft device consists of two hinged parts, namely a fixed gripper (3) extending from a body (4) made of ABS and polycarbonate plastic and a movable gripper (2) actuated by means of a lever (5).

[0072] The item to be protected (e.g., a piece of cardboard from a bag or blister pack) is introduced between two grippers (2, 3). The movable gripper (2) is brought closer to the fixed gripper (3) by pivoting a lever (5), which is then locked in a folded position by a magnetic system located at the tail (31) of the body (4). To prevent the item from separating from the anti-theft device, the grippers (2, 3) are treated with a metal plate (1) with perforated micro-protrusions to prevent the item from moving in the mid-plane, even if a dishonest individual attempts to tear the item to remove it from the anti-theft device.

[0073] The main body (4) also incorporates components that interact electromagnetically with the detection gantry, such as tuning coils or ferrite (39).

[0074] The component for locking the end (5) of the lever (5) includes a movable inertia block (36), which is pushed into a position by a spring (37) when at rest, in which the end of the movable inertia block is abutted against a notched section (6) located at the end of the lever (5) for actuating the movable gripper (2) (see See Figure 3 As the magnetic unlocker moves toward the tail (31), the inertial block (36) is attracted toward the magnet contained in the magnetic unlocker, and the locking protrusion (21) is released, which releases the tilt of the lever (5) and allows the movable gripper (2) to open. Figure 3 ).

[0075] The lever (5) is hinged to the fixed jaw (3) via a transverse pin (8). This lever, via a cam and an eccentric pin (9), causes longitudinal displacement of the movable jaw (2), the eccentric pin moving in a groove (12) in the wall of the movable jaw (2). Figure 3 ).

[0076] The main body (4) is traversed by an elongated opening (13), which extends through the elongated opening (14) traversing the lever (5) when the lever (5) is in the folded position.

[0077] These two slots allow the display unit's hanging rod to pass through, thus allowing items to be hung on the display unit's hanging rod. The elongated shape allows the lever (5) to be actuated if necessary when the hanging rod passes through it. They also allow the passage of alarm cables through all anti-theft devices, such as those that protect items at night to ensure security.

[0078] Reference Figures 6 to 10 Description of alternative implementation schemes

[0079] According to Figures 6 to 10 In the illustrated variant embodiment, the movable gripper (2) can be laterally offset to adapt to the thickness of the article to be protected using the same device. The gap between the two contact surfaces of the movable gripper and the fixed gripper in the closed position can be adjusted between a minimum gap and a maximum gap by the lateral movement of the movable gripper (2). The surfaces of the grooves of the fixed gripper (3) and / or the movable gripper (2) are covered with metal sheets having perforated micro-protrusions.

[0080] The displacement of this part allows for different levels of contact to correspond during the transmission of the descent motion of the actuated movable gripper (2).

[0081] This allows the functional gap to be switched from the first position to the second position in the locked position, thus limiting the pressure applied to the locking point.

[0082] According to this example embodiment, the fixed gripper (3) has a textured contact surface (30) with alternating straight teeth (33) and grooves (34) to form a network with a constant pitch. The fixed gripper (3) combines a component that interacts electromagnetically with the detection gantry (e.g., a tuning coil or ferrite (39)) and a magnetic unlocking system in the tail (31). The unlocking component includes, in a known manner, a movable inertial block (36) that is pushed into a position by a spring (37) when at rest, where the end of the movable inertial block engages in a hole (22) provided in a locking protrusion (21) on the movable gripper (2). When the magnetic unlocker approaches the tail (31), the inertial block (36) is attracted toward the magnet contained in the magnetic unlocker and releases the locking protrusion (21), which allows the movable gripper (2) to open.

[0083] The movable gripper (2) has a movable portion (25) and a textured contact surface (20) having alternating straight teeth (23) and grooves (24) to form a network with a constant pitch that is the same as that of the contact surface (30).

[0084] exist Figure 7 In the first position, the movable part (25) is in contact with the top of the straight teeth (23) of the movable gripper (2) and the top of the straight teeth (33) of the movable gripper (2). In this position, the grippers (2, 3) can hold the film (e.g., a food bag) in place by clamping the film between the tops of the straight teeth (23, 33) aligned in the first position.

[0085] exist Figure 8 In the middle, the movable part (25) is in a second position that is laterally offset relative to the first position, and the top of the straight tooth (23) of the movable jaw (2) engages in the straight groove (34) of the fixed jaw (3), and the top of the straight spline tooth (24) of the movable jaw (2) engages in the straight groove (33) of the fixed jaw (3).

[0086] The width of the teeth (23, 33) is slightly smaller than the width of the grooves (24, 34) so ​​that when the grippers (2, 3) are closed on the surface of the blister or cardboard, the grippers clamp the blister or cardboard by forcing the blister or cardboard to match the contour of the contact surface (20, 30).

[0087] The movable part (25) can be laterally displaced by sliding on the transverse axis (26). An elastic snap (27) having one end forming a stop ensures indexing of the two positions by interacting with a notch (28) provided on the gripper (2). The teeth (23) of the movable part (25) have a curved shape to facilitate good positioning during pivoting of the movable gripper (2) relative to the transverse rotation axis (10).

[0088] Alternative implementation plan ([ Figure 13 ]to[ Figure 15 ])

[0089] Some rigid blister packs (51) have a thermoformed boundary (52). This boundary (52) restricts the insertion capability of the package (51) between the grippers (2,3), thus limiting the holding force of the anti-theft device on the product. To overcome this drawback, a plastic lip (50) is integrated into the lower retaining gripper (3) (or the retaining gripper (2)).

[0090] When the anti-theft device is closed, the lip (50) is positioned behind the vertical boundary (52), thus preventing any rearward movement when attempting to tear the product. For this purpose, the anti-theft device according to this variant has an extension in front of the contact surface (1) of one of the grippers (movable gripper (2) or fixed gripper (3)) via the transverse lip (50). This lip (50) extends parallel to the front surface (55) of the opposing gripper in the locked position.

[0091] Adapting to the deformation of angular objects

[0092] Attached Figures Figure 16 ]and[ Figure 16a A variation of the movable gripper (2) is illustrated, having a wedge-shaped area (60) defined, for example, by two sides (61, 62), thereby ensuring the blocking of the introduction of an article with a triangular back. The fixed gripper (3) has grooves that allow the sides (61, 62) to pass through.

[0093] This variation allows for theft prevention at the corners of the products to be protected, so as to at least incorporate a display plan, i.e., a diagram or floor plan used to arrange goods to maximize sales. This display plan can be a diagram or model indicating the placement of products on shelves or the overall layout of the store, in order to display as many products as possible on store shelf units.

[0094] Alternative hooks

[0095] To provide a method for presenting an item by hanging it on a rod or support, a variation of the device is provided in that the main body of the anti-theft device is equipped with a pin (70), which is preferably capable of tilting and pivoting about a lateral axis (as shown in the attached figure). Figure 17(as shown in the attached figure) or by translation (as shown in the attached figure) Figure 18 (as shown) to retract, the pin (70) is formed, for example, by a metal rod that is folded to form a “U” ring.

[0096] Variation with electronic alarm

[0097] Attached Figures Figure 19 Another variant compatible with all the foregoing and following variations is shown, wherein the fixed contact surface (30) has a groove (80) for a probe to pass through, the probe being formed by a protrusion (81) of an actuating electrical contact. When the grippers (2, 3) come together and the contact surfaces (20, 30) are pressed against the article, the contact (81) is pushed back into the retracted position, which puts the electrical contact into a first state. If a malicious person attempts to forcibly open the anti-theft device by moving the grippers apart with a tool (e.g., a screwdriver), the contact (81) is spring-driven back into the extended position, which puts the electrical contact into a second state. When the anti-theft device is equipped with a radio communication module, the state change allows a signal to be sent to a central monitoring station. This signal can be encoded using a sequence used to identify the anti-theft device as the object of an attempted intrusion.

[0098] This variant provides an additional level of safety by activating an alarm when an attempt is made to move the grippers away from the protected product using a tool in order to remove the product from the grippers by pulling. An alarm is also triggered by an electronic module housed in the main body of the device in the event of an attempt to break in causing the product to be pulled or an attempt to separate the grippers, thereby triggering the detector.

[0099] In the attached figure [ Figure 19 The diagram also shows a variation of the contact surface (30) that is not specific to this probe variation. The contact surface (30) has a slightly raised area (82 to 85) less than one millimeter in diameter, which is advantageously deformable by compression to improve the retention of thin articles clamped between the two contact surfaces (20, 30).

[0100] Variation with lever locking button

[0101] From the attached diagram [ Figure 20 ];[ Figure 21 ]、[ Figure 22The illustrated variant relates to another improved variant designed to increase resistance to forced unlocking by applying an impact. The locked counterweight is engaged in the cavity of the lever (5) by a force applied by a spring; unlocking occurs when a counterforce is applied by moving a suitably positioned magnet closer together. However, by applying a violent impact, the kinetic energy of the inertial block, under the action of the acceleration generated by the impact, may result in the same unlocking effect. This variant involves providing a lever (50) having a button (90) formed at the end of the pivot head portion.

[0102] When the anti-theft device is in the state shown in the attached figure [ Figure 20 In the waiting situation illustrated, the lever (5) is in the raised position, and the lever locking button (90) is in the position pushed toward the inertial block (36) under the pressure of the spring.

[0103] During the rotation of lever (5) Figure 21 Pressure must be applied to the button (90) at the same time so that the button tilts backward, that is, tilts in the opposite direction to the inertial block (36).

[0104] As the rear protrusion (95) slides on the inclined surface (96) of the inertial block (36), the continued travel of the lever (5) causes the inertial block (36) to return. Pressing the button (90) allows space to be released to receive the end of the lever (5). When the lever (5) reaches the low position, the inertial block (36) is opposite to the slot (97) provided on the lever (5). The inertial block (36) is then pushed under the pressure of its spring (37) to engage in the orifice (97).

[0105] As shown in the attached figure [ Figure 22 As shown, the user releases the pressure applied to the lever (5) and the locking button (90). The lever (50) moves upward under the action of its spring, and the teeth of the lever and the teeth of the inertial block (36) are blocked. The blocking button (90) moves forward under the action of its spring and is positioned below the lever (5). In this position, the lever (5) can no longer move downward without applying pressure to the button (90) to make the vertical blocking point disappear. The lever of the blocking claws (2, 3) interacts with the button placed opposite the lever (5), which requires pressure to be applied to both elements simultaneously to release the counterweight for the blocking claws (2, 3). According to this variant, the device includes a lever (50) for blocking the claws (2, 3) having a button (90) formed at the end of the pivot head portion, the blocking lever (50) interacting with the lever (5) to lock the lever in the locked position of the anti-theft device.

[0106] Alternative contact surfaces with retaining lips

[0107] According to the attached figures [ Figure 23 In the illustrated variant, the contact surfaces (20, 30) are formed of a metal sheet with perforated micro-protrusions, which is folded to have a stop (29) perpendicular to the contact surfaces (20, 30). The stop (29) is inserted into a housing present in the fixed jaw (3) and the movable jaw (2) to prevent the plate from sliding during the fixing of thick products.

[0108] In practice, the retaining plate exhibits a forward sliding effect / force due to the high pressure applied by the grippers to the protected product. In this example, the micro-embossed plate (20) has slightly raised deformable disc-shaped areas (82 to 86) to improve the retention of thick articles.

[0109] Application of the anti-theft device according to the present invention

[0110] This invention has garnered significant attention for the protection of both food products (due to their design and hygiene standards associated with metal sheets) and non-food items. It is suitable for a wide range of blister materials (plastics, cardboard, bags, textiles, etc.) and for bundling.

[0111] The lever (5) is provided with teeth (100 to 104) that are bifurcated to have deformable springs (110 to 114) with a pressure wall layout that provides damping against pressure applied to the movable jaws by the lever in the case of a product with a large thickness.

[0112] Variation with bifurcated teeth

[0113] According to the attached figure [ Figure 24 ]and[ Figure 25 In the variant illustrated in [ ], the lever (5) is provided with teeth (100 to 104) that are bifurcated to present deformable springs (110 to 114) for arranging pressure walls that provide damping against the pressure applied by the lever to the movable jaws in the case of thick products.

[0114] When the grippers are pressed against a very thick product, high stress is transmitted to the support structure via levers. To limit these stresses, four pressure walls have been arranged to allow force reduction through deformation of these pressure walls.

[0115] The geometry of this arrangement allows the pressure walls to maintain maximum pressure in the locked position without deformation.

[0116] Strap protection system for items

[0117] Attached Figures Figure 26A variation of the application of the invention is illustrated. Protection is provided by a system consisting of a band (120, 121) and a claw-type anti-theft device (122) according to the invention. A metal sheet (1) with perforated micro-protrusions disposed on the claws (2, 3) locks the band (120, 121).

[0118] The strapping (120, 121) is wrapped around the product, for example, presented in cardboard. The claw-type anti-theft device (122) according to the invention is introduced under the strapping (120, 121) by means of the front bevel (123) of the fixing claw (3), thereby facilitating positioning under the strapping.

[0119] The lower gripper (3) is equipped with a sensor that allows pressure applied to the sensor by the strapping to be detected during locking of the device (122).

[0120] If a thief cuts the belt or tears off the anti-theft device (122) from the belt, the pressure on the belt loosens and the sensor becomes ineffective.

[0121] Disabling the sensor will trigger an alarm.

[0122] Strap protection system for adjustable alarm cables

[0123] Attached Figures Figure 27 ][ Figure 28 Another variation for locking the adjustable alarm cable (130) is illustrated in both the open and locked positions. In this variation, the element to be secured is a plastic-coated steel cable (130).

[0124] The cable (130) forms an integral part of the device. The cable is designed to enclose any hatching product. One end of the cable (132) is mechanically secured to the plastic body of the anti-theft device, which is connected to the electronic circuitry.

[0125] The other end (133) of the cable slides freely inside the body of the device to allow adjustment of the length of the loop around the object to be protected. To secure the loop to the desired length, it is sufficient to lower the lever so that the clamps equipped with metal retaining plates press the cable against it.

[0126] In this position, the cable (130) can no longer slide, and the object introduced into the loop can no longer be removed. An alarm is triggered during an attempt to break in by disconnecting the cable. Similarly, any separation of the grippers will cause an alarm to be triggered.

[0127] Variations for pole display

[0128] Attached Figures Figure 29 ]to[ Figure 32An alternative embodiment of an article presented on a display rod (140) is illustrated. The lever (5) is provided with a sleeve (145) which advantageously has a spring that interacts with the rod (140) to prevent the removal of several devices in a group. The interaction device is, for example, the interaction device described in patent US12053107B2.

[0129] The rod (140) is designed to hold an item attached to the anti-theft device (122). The rod (140) is made of a smooth rod with a cross-section smaller than or equal to the cross-section of the hole through the sleeve (145) and has a free end section (146) with a notch or thread.

[0130] The sleeve (145) has a groove whose cross-section is complementary to the cross-section of the rod and is larger than the cross-section of the notched free end (146), and includes at least one tooth that can be disengaged by an external actuating component to interact with the notch or thread when at rest.

Claims

1. An anti-theft device comprising a detection component and a magnetic locking component, a movable gripper (2) and a fixed gripper (3) extending from a body (4), the movable gripper and the fixed gripper each having an inner contact surface (20, 30), and the movable gripper (2) being hingedly connected to the fixed gripper (3) for engaging by clamping at their respective contact surfaces (20, 30), the anti-theft device being characterized in that at least one of the grippers (2, 3) is provided with a metal sheet (1) having a perforated micro-protrusion.

2. The anti-theft device according to claim 1, characterized in that, The micro-protrusions have a height between 0.3×E and 0.8×E, where E represents the thickness of the metal sheet (1), which is between 0.1 mm and 0.3 mm.

3. The anti-theft device according to claim 1 or 2, characterized in that, The micro-protrusions form a matrix, wherein the gap between two adjacent micro-protrusions is between 0.4 mm and 0.7 mm.

4. The anti-theft device according to claim 1, characterized in that, The movable gripper (2) and the fixed gripper (3) are each provided with a metal sheet (1) with perforated micro-protrusions.

5. The anti-theft device according to claim 1, characterized in that, The movable gripper (2) engages with a pivot lever (5), which is hinged to the fixed gripper (3) via a shaft (8) and hinged relative to the movable gripper (2) via a contact surface. The assembly ensures constant pressure across the entire surface to be protected.

6. The anti-theft device according to claim 1, characterized in that, The movable jaw (2) engages with a pivot lever (5), which is hinged relative to the fixed jaw (3) via a shaft (8) and to the movable jaw (2) via an eccentric shaft (9) that interacts with the slot (12).

7. The anti-theft device according to claim 1, characterized in that, The main body (4) is traversed by the groove (13).

8. The anti-theft device according to claim 7, characterized in that, The lever (5) has a groove that leads to the groove (13) of the body (4) when the lever (5) is in the locked position.

9. The anti-theft device according to claim 1, characterized in that: a) The contact surfaces are movable relative to each other in the lateral direction between the first position and the second position. b) Each of the contact surfaces (20, 30) has a complementary profile formed by alternating protruding and recessed areas. c) The profile is configured such that when the grippers (2, 3) are in the clamping position, a. When the contact surfaces (20, 30) are positioned in the first position, the tops of the protruding areas of the contact surfaces make contact. b. When the contact surfaces (20, 30) are positioned in the second position, the top of the protruding area of ​​the contact surface contacts the bottom of the recessed area.

10. The anti-theft device according to claim 8, characterized in that, The contact surface can move between the first position and the second position by sliding laterally.

11. The anti-theft device according to claim 8, characterized in that, The fixed gripper (3) and the movable gripper (2) are hingedly connected to the pivot shaft between the following positions: c) Locked position, in which the two contact surfaces (20, 30) are brought together and locked by the magnetic locking component until the magnetic locking component is deactivated. d) Insertion position, in which the two contact surfaces (20, 30) are separated.

12. The anti-theft device according to claim 8, characterized in that, The complementary contour has teeth forming the protruding area, the teeth being spaced apart at a constant pitch by grooves forming the recessed area.

13. The anti-theft device according to claim 12, characterized in that, The width of the tooth is smaller than the width of the groove.

14. The anti-theft device according to at least one of claims 1 to 3, characterized in that, The movable jaw (2) or the fixed jaw (3) extends a transverse lip (50) in front of their contact surfaces (20, 30), the lip (50) extending parallel to the front surface (55) of the opposing jaw in the locked position.

15. The anti-theft device according to at least one of claims 1 to 3, characterized in that, At least one of the grippers (2, 3) is provided with a sensor (80) flush with the surface of the contact surface (20, 30), and the main body of the device includes an electronic alarm module.

16. The anti-theft device according to at least one of claims 1 to 3, characterized in that, The anti-theft device includes a locking lever (50) for the grippers (2, 3), the locking lever having a button (90) formed at the end of the pivot head portion, the locking lever (50) interacting with the lever (5) to lock the lever in the locked position of the anti-theft device.

17. The anti-theft device according to at least one of claims 1 to 3, characterized in that, The lever (5) is provided with teeth (100 to 104), which are forked to have deformable springs (110 to 114).

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