FR2783273A1 - Spectacle anti theft mechanism having outer thin level section and inner smaller U-section with screw spectacle side frame clamping. - Google Patents

Abstract

The anti theft mechanism has an outer small width, long length label (1), and an inner shorter section (5) which is U-shaped. The mechanism forms a single plastic unit and slides over the spectacle side frame, and is screwed (8) in position.

Description

The invention relates to a device for preventing the theft of any object.

  of elongated shape such as a pair of glasses, especially in places where these objects are

offered in self-service.

  In these establishments, the pairs of glasses are notably displayed on display stands where the buyer

  potential withdraws them to try them.

  Unscrupulous buyers can, after fitting, put the chosen pair of glasses in their pocket, as

if they already belonged to them.

  Anti-theft systems have already been proposed in which the elongated object, such as glasses, is engaged. These systems make it possible to block one of the branches of the glasses in its open position by means of a sleeve threaded onto this branch and abutting against the rear face, either of the frame or of the eyepiece. Such an anti-theft device has been described in patent FR-2 445 538. This anti-theft device comprises a socket which has an orifice for the passage of immobilization means. These means are constituted by a needle screw. After tightening, one end of the screw comes directly or indirectly into contact with the branch of the pair of glasses on which the device has been threaded and makes it possible to maintain the latter on this branch

  while preventing the branch from being folded back.

  In other types of anti-theft systems already known, a key is used to wedge the socket on the branch, the latter passing inside a channel

formed in the socket.

  Finally, FR-2 672 346 describes an anti-theft device consisting of a labeling support which is snapped in according to a process which makes it irremovable for safety reasons on a socket blocking the branch in the open position. Several types of supports are provided depending on the shape and size of the labels to be placed on them. These systems are very effective because the fact that the branch cannot be folded, the indelicate consumer can hardly place the pair of glasses

  in one of his pockets or camouflage it easily.

  However, these systems have a number of drawbacks. They can only be released with great difficulty. In addition, the glasses are relatively fragile objects and it can be seen that, during the release operation and even sometimes when the anti-theft system is installed, the branch of the glasses is damaged by the wedging or loosening operation of the key.

  or tightening or loosening the screw.

  On the other hand, a branch comprising such an anti-theft device cannot be folded. This complicates the packaging and transport of the glasses when the anti-theft device is installed at the manufacturer. The device is also relatively bulky, which does not always allow the consumer to be able to try

  correctly the pair of glasses offered to his desire.

  Finally, these devices require adaptation to be used with all types of detection technology currently existing. Indeed, the labeling support corresponding to the type of detection technology must be snapped in according to a process which makes it irremovable on the socket. It is therefore necessary to provide stocks of different suitable supports, an additional latching action must be carried out and, in the event of an error, the device is lost because it is not

not possible to change the medium.

  Thus, the present invention which proposes to resolve these drawbacks relates to an anti-theft device for a pair of glasses, said glasses comprising at least one foldable branch, said device comprising: a plate of reduced thickness and of approximately rectangular elongated shape having a first face approximately flat intended to receive a labeling and a second face approximately flat and opposite to the first; - A U-shaped element (or material bridge) integral with the second face of the plate and forming with the latter walls of a channel, said channel being intended to receive the branch and having two ends; - an attached screw intended to be introduced and screwed into a screwing hole arranged in one of the walls of the channel in order to clamp the branch against the wall

of the channel opposite the screw.

  According to the invention, the plate and the U-shaped element form a single piece of plastic material, said piece being arranged to allow the closure of

branch.

  In various embodiments of the invention, the following means, which can be combined according to all technically possible possibilities, are used: - the screwing orifice is arranged on the U-shaped element on the wall opposite the second face of the plate along an axis approximately perpendicular to the plane of the second face so that, the screw being introduced and screwed into the orifice and the branch being placed in the channel, the branch is pressed against

  the second side of the plate in the channel.

  - the screw hole is arranged on the U-shaped element on one of the two walls adjacent to the second face of the plate along an axis parallel to the plane of the second face, so that the screw being introduced and screwed into the orifice and the branch being placed in the channel, the branch is pressed against the

opposite adjacent wall.

  - the screw hole is arranged on the plate in the wall opposite the U-shaped element so that, the screw being inserted and screwed into the hole and the branch being placed in the channel, the branch is pressed inside the channel against the wall of the U-shaped element opposite the second face of the plate. - the anti-theft device comprises an attached protective tongue comprising at least one non-slip face, said tongue being, in the position of use, placed between the branch and the screw, the face

  non-slip being placed against the branch.

  The term non-slip corresponds to any surface treatment aimed at preventing or reducing the possibility of slipping, for example granite surface, embossing, grooving, etc.

  - the protective tab is a semi-sheet

  elastic of which at least one of the dimensions is substantially greater than the corresponding dimension of the channel so that once introduced into the channel and before the introduction and the screwing of the screw, it is

  held in place constrained by its own elasticity.

  - the protective tab has an approximate gutter shape and has a bottom and two

side edges.

  - one of the two lateral edges of the tongue in the approximate shape of a gutter is substantially higher than the other. - the protective tab in the approximate shape of the gutter being in the rest position, not introduced into the channel, the bottom and the two lateral edges are approximately flat and perpendicular two by two

between them.

  - the protective tongue in the approximate shape of a gutter being introduced into the channel, the branch being introduced into the channel, the highest lateral edge of the tongue is interposed between the screw and the branch. - The wall of the channel opposite the wall comprising the screw hole, has a branch centering guide. - the centering guide has an approximate shape

in open V.

  - the centering guide at the base of the V

has a longitudinal groove.

  - At least one tab guide is disposed laterally to the centering guide on the corresponding wall. - the tongue guide has an elongated bowl

transversely.

  - the shortest lateral edge of the protective tab in the approximate shape of a gutter is placed, in the position of use, in the bowl of the

tab guide.

  - at least one tab stop is provided.

  - the tab stop (s) are located at a

from both ends of the channel.

  - A second end of the channel has at least one stop for the tongue so that the tongue introduced by the first end of the channel and pushed inside the channel cannot come out through the

second end.

  - the labeling includes at least one element

detectable.

  - the labeling includes at least one detectable element, active or passive, by a detection device

  using electromagnetic or magnetic means.

  - the size of the plate along its major axis is between 30 mm and 100 mm and preferably

approximately 75 mm.

  the dimension of the plate along its minor axis is between 30 mm and 60 mm and preferably

approximately 48 mm.

  - the thickness of the wafer is between 1 mm and 10 mm and preferably approximately

1.5 mm.

  - the material bridge preferably measures approximately 30 mm by 20 mm for a height of

mm to 20 mm.

  - the inner channel preferably measures approximately 27 mm by 20 mm with an average height

7 mm.

  - the material bridge can extend over all or

  part of the second side of the plate.

  - The first face of the wafer has at its periphery a rim to prevent tearing of the labeling. - the monobloc part is made of plastic material can be molded and is preferably made of plastic material

  of the polyethylene or polypropylene type.

  - the term screw corresponds to any screwing means of the screw type o the drive element (screwdriver) adapted to the receiving means of the screw and used for setting up, screwing and / or unscrewing is either male type, or female type. It can also include these two types, the screwing being then obtained by means of the male type and the unscrewing by means of the female type or vice versa. - The term screw can correspond to any element comprising a safety means preventing unscrewing and screwing by conventional means and / or the pursuit of

  screwing once this is done.

  - the screw receiving means is preferably

  placed at the bottom of a well centered in the screw.

  - The screw receiving means is preferably adapted to a drive element of the triangular hollow key type. The invention also relates to a method of installing an anti-theft device. According to the invention of the method, a device according to any one of the preceding characteristics and means is fixed to a foldable branch of a pair of glasses according to the following steps: - a protective tab is inserted in the channel formed by a plate and a U-shaped element (or material bridge) in a one-piece plastic part; - a screw is inserted in the screw hole of the one-piece plastic part; - The branch is inserted into the channel, the protective tab being interposed between the branch and the screw, the first face of the plate being oriented outside the branch and the pair of glasses;

- the screw is screwed.

  The invention therefore makes it possible to obtain an economical anti-theft device, simple to produce and to implement while being safe and universal. It can receive by labeling any type of detection technology currently existing thanks to the large surface of the wafer while not blocking the branch and not hampering the fitting of the pair of glasses. Thanks to the large area available for labeling, more commercial information can be placed while remaining legible for the consumer and / or optical recognition devices. The dual display of prices is also possible associated with one or more bar codes as well as text intended for the consumer. Furthermore, the fact that the channel can extend both in length and in width over all or part of the second face of the plate, all types of branches in size, shape and added elements, side sun visors by

  example, can benefit from this device.

  The invention will be better understood and other objects, advantages and characteristics thereof will appear

  more clearly on reading the description given in

  look at the accompanying drawings in which: FIG. 1 is a perspective view of the device

  anti-theft device towards a first end of the channel.

  Figure 2 is a perspective view of the device

  anti-theft device towards a second end of the channel.

  Figure 3 is a perspective view of a protective tab according to a preferred embodiment. Figure 4 is a side view of the device

  anti-theft device according to a preferred embodiment.

  Figure 5 is a perspective view of the device

  anti-theft device installed on a branch of a pair of glasses.

  The elements common to the different figures will be

  designated by the same references.

  Figure 1 is a side view of the anti-theft device where only the one-piece plastic part is shown seen from the side of the second face 3 of the wafer 1 carrying the material bridge 4. The one-piece piece is made by molding of thermoplastic material and preferably by extrusion. The wafer 1 has a substantially constant thickness between its first face 2 and its second face 3. The material bridge 4 is preferably disposed towards one of the ends of the wafer 1. The material bridge 4 and the second face of the wafer define a covered channel 7 through which a branch of a pair of glasses can be introduced. The covered canal 7 is delimited by four walls. The wall 6 of the material bridge is approximately parallel to the second face 3 of the wafer 1, this second face 3 forming one of the walls of the covered channel 7 at the level of the material bridge 4. The two side walls 5 and 5 ′ of the bridge of material 4 are approximately perpendicular to the second face 3 of the wafer 1. In this embodiment, the different walls forming the channel 7 are substantially perpendicular to each other, but however, in other embodiments, the angles between these walls may vary in order to obtain an aesthetic effect and / or avoid excessively sharp edges. In this figure two embodiments are shown corresponding to two possible positions, among others, screw holes. According to a first mode, the preferred mode, through the wall 6 of the material bridge 4, approximately in its center, a screw hole 16 is drilled. This orifice has a thread intended to receive a screw. In this embodiment, the branch of the pair of glasses which is introduced into the channel 7 is therefore pressed by the screw against the second face 3 of the plate 1 in the zone of the channel 7. According to a second embodiment shown, the screw hole 15 is disposed through the side wall 5 of the material bridge 4. In this second embodiment, the branch which is introduced into the channel 7 is pressed against the opposite side wall 5 'of the material bridge 4. In in the case where the screwing orifice 16 is disposed in the wall 6, a branch centering guide 71 is produced and extends transversely in the channel on the wall opposite the screwing orifice. This centering guide is intended to center the branch relative to the screw and to prevent the branch from being able to

  slide and therefore, it is no longer retained by the screw.

  The centering guide 71 is preferably symmetrical

  in open V and has at its base a hollow groove 72.

  Bilaterally to the centering guide 72 are arranged two tongue guides 73 in the form of a bowl. At least one of these tongue guides 73 is intended to receive a protective tongue face which is thus guided during its introduction into the channel and which participates in maintaining the tongue. In the case where the screw hole 15 is disposed on a side wall 5 (or 5 ′) of the bridge, the centering guide 71 and the tongue guide (s) 73 will be on the opposite wall 5 ′ (or 5 respectively) . Similarly, if the orifice is placed on the plate, the guides 71 and 73 will be arranged on the

O10 wall 6 of the material bridge.

  The edges and corners of the wafer and / or the material bridge will preferably be rounded and softened to prevent sharp edges or corners from injuring the user. FIG. 2 represents the plate seen in perspective on the opposite side of the material bridge with respect to FIG. 1. In this FIG. 2, the preferred embodiment o the screwing orifice 16 is placed in the wall 6, we note, in addition to the elements described above, two tab stops 25 intended to prevent a tab inserted and pressed at a first end of the channel 7 from escaping through the second end of the channel. In other embodiments, these stops may be placed at the two ends of the two tongue guides 73 on the same side of the channel 7. These stops correspond to thin thicknesses

  of plastic in cut sides.

  In a third embodiment of the invention, not shown, the screw hole is drilled through the plate 1 at the level of the channel 7 so that the branch introduced into the channel 7 is pressed against the wall 6 of the material bridge 4 by screw. In this case, the labeling will preferably be placed on the first face of the plate after introduction and

  screwing the screw thus masking the screw.

  In FIG. 3, a protective tab 10 produced according to a preferred embodiment of the invention, is shown in perspective. The protective tab is made of a semi-elastic plastic sheet, however, having a certain rigidity. The protective tongue 10 in the form of a gutter has three faces of uneven surface which, in the rest position, are approximately perpendicular to each other in pairs and plane. The face 13, the first lateral edge of the gutter which has the largest surface, is intended to be interposed between the screw and the branch which is introduced into the channel 7. The tongue preferably comprises a single face having received a non-slip treatment. The non-slip side of the tongue is placed against the temple. The face 11, second lateral edge of the gutter, has the most reduced surface and is intended to come into one of the tongue guides 73. The face 12, bottom of the gutter, is a connecting face between the faces 13 and 11 The protective tab 10 is intended to be slid inside the channel 7 as shown in FIG. 4. The dimensions of the faces 13 and 12 of the protective tab 10 will be substantially greater than the corresponding dimensions of the channel 7 so that , while allowing its engagement in the channel 7, the latter, once engaged in the channel 7, is constrained by its own elasticity inside said channel 7 and cannot move alone under the effect of its own weight or following impacts on the device while the screw is not yet inserted and / or screwed. Furthermore, the stops 25 prevent the tongue from coming out from the side

  opposite of the channel to that where it can be introduced.

  All forms of tabs are provided and in particular a tab with five sides, two of which are

  intended to come in the two tab guides.

  In Figure 4, the anti-theft device is shown complete and includes a plate 1 with the material bridge 4 forming a channel 7 o is inserted, constrained, the protective tongue 10. A screw 8 is placed in the screw hole 16 of the wall 6. The face 13 which has the largest surface of the tongue 10 is arranged on the side of the screw 8 so that once the branch introduced into the channel, the tongue is interposed between the branch and the screw. Because the dimensions of the faces 13 and 12 of the tongue 10 are substantially greater than the corresponding dimensions of the channel 7, these faces are slightly constrained and curved due to the semi-elasticity of the tongue 10. FIG. 5 is a view in perspective of an anti-theft device mounted on a branch of a pair of glasses. The plate 1 is arranged towards the outside of the branch and of the pair of glasses. In the use position, the protective tab 10 may or may not extend beyond the material bridge 4. It can be seen that nothing

  does not hinder the closure of the branch.

  The various examples of implementation of the invention are given for information only

  and cannot limit the scope of the invention.

Claims (12)

  1. Anti-theft device for a pair of glasses comprising at least one foldable branch, said device comprising: - a plate (1) of reduced thickness and of approximately rectangular elongated shape having a first face (2) approximately flat intended to receive labeling and a second face (3) approximately planar and opposite to the first; - A U-shaped element (4) integral with the second face (3) of the plate (1) and forming with the latter walls of a channel (7), said channel being intended to receive the branch and having two extremities; - an attached screw intended to be introduced and screwed into a screw hole (15,16) arranged in one of the walls (5, 5 ', 6, 3) of the channel (7) in order to clamp the branch against the wall of the channel opposite the screw; characterized in that the plate (1) and the U-shaped element (4) form a single piece of plastic material, said piece being arranged to allow the branch closure.   2. Anti-theft device according to claim 1, characterized in that it comprises an added protective tongue (10) comprising at least one non-slip face, said tongue being, in the position of use, placed between the branch and the screw, the face   non-slip being placed against the branch.   3. Anti-theft device according to claim 1 or 2, characterized in that the screw hole (16) is arranged on the U-shaped element (4) on the wall (6) opposite the second face (3) of the plate (1) along an axis approximately perpendicular to the plane of the second face so that, the screw (8) being introduced and screwed into the orifice (16) and the branch being placed in the channel (7) , the branch is pressed against the second face (3) of the plate in the channel (7). 4. Anti-theft device according to claim 1 or 2, characterized in that the screw hole is arranged on the U-shaped element (4) on one of the two walls (5, ') adjacent to the second face. (3) of the plate along an axis parallel to the plane of the second face, so that, the screw being introduced and screwed into the orifice and the branch being placed in the channel (7), the branch   either pressed against the adjacent adjacent wall (5 ′, 5).   5. Anti-theft device according to claim 1 or 2, characterized in that the screw hole is arranged on the plate in the wall opposite the U-shaped element (4) so that, the screw being inserted and screwed into the orifice and the branch being placed in the channel, the branch is pressed inside the channel (7) against the wall (6) of the U-shaped element opposite to   the second face (3) of the plate.   6. Anti-theft device according to any one of   previous claims, characterized in that the   protective tab (10) is a semi-foil   elastic of which at least one of the dimensions is substantially greater than the corresponding dimension of the channel so that once introduced into the channel and before the introduction and the tightening of the screw (8), it is   held in place constrained by its own elasticity.   7. Anti-theft device according to claim 6, characterized in that the protective tab has an approximate gutter shape and has a bottom (12) and two lateral edges (13, 11) one of which is substantially higher than the other, and in that, in the rest position, not introduced into the channel, the bottom and the two lateral edges are approximately plane and perpendicular two by two between them, and in the use position, the protective tab and the branch being introduced into the channel, the uppermost edge (13)   is interposed between the screw and the branch.   8. Anti-theft device according to any one of   previous claims, characterized in that the wall   of the channel (7) opposite the wall comprising the orifice   screwing, comprises a branch centering guide (71).   9. Anti-theft device according to any one of   Claims 2 to 8, characterized in that at least one   tongue guide (73) is arranged laterally to the guide   centering (71) on the corresponding wall.   10. Anti-theft device according to any one of   Claims 2 to 9, characterized in that at least one   tongue stopper (25) is provided.   11. Anti-theft device according to any one of   previous claims characterized in that   the labeling includes a detectable element.   12. Method for setting up an anti-theft device characterized in that a device according to any one   of the preceding claims is fixed on a branch   foldable of a pair of glasses according to the following steps: - a protective tab (10) is inserted in the channel formed by a plate and a bridge of material from a single piece of plastic material; - A screw (8) is inserted in the screw hole of the one-piece plastic part; the branch is inserted into the channel (7), the protective tab being interposed between the branch and the screw, the first face (2) of the plate being oriented outside the branch and of the pair of glasses and that the protective tab is interposed between the screw and the branch; - the screw is screwed.