Table plate for supporting one or more objects and chair structure comprising table plate

Abstract

A table for supporting one or more objects, the table having: a shelf (2) adapted for placement of one or more objects; a hinge (4) anchored to the shelf (2) and adapted to rotate about a predetermined first axis of rotation (R1) to allow selective rotation of the shelf (2); a support element (6) having ends (7, 8) connected to the hinge (4) and to the chair or armchair structure, respectively; restraint means (21) adapted to facilitate selective locking / unlocking of the shelf (2) in the working position. Such restraining means (21) comprise a pin (22) operatively connected to the support element (6) and a shaped seat (25) formed in the hinge (4) to allow insertion of the pin (22). The shaped seat (25) comprises: a first portion (28) adapted to allow insertion of the pin (22) with a reduced clearance to define a rotational constraint for the hinge (4) about the rotational axis (R1) and to lock the shelf (4) in the working position; and a second portion (29) adapted to allow insertion of the pin (22) and adapted to selectively rotate about the first axis of rotation (R1) and the pin (22) during rotation of the hinge (4) to allow partial or complete insertion of the pin (22) into the second portion (29). The table plate further comprises actuating means (31) adapted to facilitate controlled movement of the hinge (4) and / or the pin (22) relative to the support element (6) to facilitate selective insertion of the pin (22) into the first portion (28) or the second portion (29). The invention also describes a chair structure comprising the table board.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of furniture and furnishings, and in particular to a table top for supporting one or more objects. A chair structure intended to be used in cooperation with the table top for supporting one or more objects of the present invention is also provided. BACKGROUND

[0002] As is known, many chairs or armchairs allow the integrated provision of a table top, on which the user can place different types of material during the time spent in a seated position.

[0003] Chairs of this type are particularly appreciated in all those environments in which people need to be seated to perform certain activities.

[0004] For example, the table top allows the user to place a notebook, a pen, a laptop or a smartphone on it, so that the user can take notes or perform various tasks during a work session, a meeting or other similar events, for which the user is expected to be seated for a long time in the chair.

[0005] It is therefore not surprising that chairs or armchairs equipped with a table top are often used in offices, universities, conference centres and all places where people gather and must also perform activities while seated.

[0006] Therefore, in the field of chairs and armchairs, there is a need to make a structure that provides certain special features to the table top.

[0007] First of all, the overall ergonomics of this type of chair must be quite high to ensure that the user is in a particularly comfortable position, both when he or she is performing an activity with the aid of the table top (for example, writing or using an electronic device) and when he or she remains seated without performing any further action (in fact, without involving the use of the table top).

[0008] Furthermore, it is well known that a table top kept in a work position (i.e. arranged substantially along a horizontal plane) occupies space, which in turn greatly increases the overall footprint of the chair or armchair.

[0009] Therefore, another feature of this type of chair and armchair is the ability to greatly reduce the size when the user does not use the table top, thus optimising the space so that more chairs can be placed even when the table top is not needed.

[0010] In addition to what has been described above, a chair comprising a seat must provide a seat movement system that is safe, reliable and convenient for the user to operate.

[0011] In fact, it should be noted that the table top should be able to be moved quickly and without requiring particular effort from the user from a folded position (rest position) to an active position (i.e. arranged for supporting one or more objects).

[0012] Furthermore, the table top must be able to support a relatively heavy weight without suddenly failing or moving, causing the objects placed on the support surface to fall (thus also putting the user in danger).

[0013] To solve the above problems, some special chair or armchair configurations have been developed which aim to integrate the table top.

[0014] The patent document EP 0995376 describes a foldable chair structure comprising a table top which is also foldable. The table top is connected to the chair structure by means of a hinge formed by a plurality of mutually connected components which can be selectively moved between a lower position (in which the table top remains substantially vertical) and an upper position (in which the table top assumes a horizontal configuration). Furthermore, the hinge has a tilting and rotating mechanism consisting of a horizontal hinge and a vertical hinge. The horizontal hinge consists of an additional sleeve with a stop cam and a tubular element with a recess arranged eccentrically below the table top. On the other hand, the vertical hinge consists of a tubular seat and a pin adapted to be inserted into the seat; the pin can be pushed into the tubular seat, thus compressing a spring and disengaging a stop associated with the table top. Thus, in this way, the user can facilitate the selective (and safe) rotation of the table top from the upper position to the lower position.

[0015] The table top operating mechanism described in the above chair structure is rather complex and requires the hinge to be anchored directly to the armrest of the chair itself. Furthermore, this mechanism strictly limits the positions that the table top can assume with respect to the user.

[0016] The patent document US 20020190546 describes a chair comprising a seat, a backrest and a table top which can be moved between a lowered (non-working) and a raised (working) position. When the shelf is in the lowered position, it remains inclined with respect to the plane of symmetry of the chair, so that two or more chairs of the same type can be placed side by side longitudinally to each other and with the table tops of the adjacent chairs in a partially overlapping position. Also, a hinge element is provided comprising two bodies which are mutually connected and rotatable with respect to each other. One of the bodies has a semicircular recess extending by 180°, within which a pin can slide and the stop at the end of the recess defines the limit positions in which the table top can be rotated. A spring-loaded retaining mechanism is also included, designed to stably hold the table top in place when it is in the lowered position. In particular, the mechanism comprises a pair of pins which are slidably mounted within appropriate slots formed on one of the bodies; the ends of these pins removably engage recesses formed on the other body of the hinge.

[0017] The hinge structure described in the aforementioned document is rather complex and does not allow the folding of the table top to a position that minimizes the space occupied by the chair when it is not in use (for example, placing it behind the backrest). Moreover, in this solution, the positioning of the table top with respect to the user is also strictly limited.

[0018] Furthermore, the chair structure described in the aforementioned document does not provide a table top suitable for use completely symmetrically (regardless of whether the user is right- or left-handed).

[0019] In other words, the table top operating mechanism described in the cited document does not provide the same degree of freedom of operation (and therefore the ability to obtain the same final position) for the table top when it is placed to the right of the chair frame (for a right-handed user) or to the left of the chair frame (for a left-handed user).

[0020] Patent document US6422646 describes a support intended to cooperate with a chair frame. This support is specifically designed to support a computer keyboard in an optimal operating position for the user. The support has a clamp attached to the base chair bar, an arm extending transversely and laterally from the clamp, a first vertical tubular element and a second vertical tubular element hinged to each other, and a substantially transverse table top. The first and second tubular elements define two rotation axes offset laterally from each other around which the table top can rotate. Therefore, the user can rotate the table top around the vertical axis defined by the clamp and around the vertical axis defined by the first and second tubular elements to adjust the position of the table top to the right or to the left of the chair structure.

[0021] However, the solution proposed by this chair structure has the disadvantage that it does not allow the folding of the table top to an idle position.

[0022] Therefore, it is not possible to reduce the overall space occupied by the structure when the user does not intend to use the table top during the time in which he or she remains seated.

[0023] Furthermore, this hinge allows the rotation of the table top within a limited range, which sacrifices the flexibility of use of the table top.

[0024] Therefore, the ergonomics of the chair achieved by the structure described above is limited, as is the comfort perceived by the user when using the table top.

[0025] Patent document KR101980441 describes a table top suitable for integration into a chair or armchair structure to support an object. However, the table top described in this document also exhibits the same drawbacks described above. SUMMARY

[0026] The present invention aims to overcome the technical drawbacks described above by providing a table top particularly efficient and high-performing for supporting one or more objects.

[0027] In particular, one object of the present application is to provide a table top for supporting one or more objects which is particularly ergonomic to use for any type of user, whether right- or left-handed.

[0028] Another object of the present application is to provide a table top for supporting one or more objects which exhibits a high degree of freedom of movement, regardless of which side it is used relative to the user.

[0029] Another object of the present application is to provide a table top for supporting one or more objects which is simple to manufacture and easy to assemble.

[0030] A further object of the present application is to provide a table top for supporting one or more objects which is particularly safe to use during use and which maintains a stable active position even when the user interacts with it unintentionally.

[0031] Another object of the present application is to provide a table top for supporting one or more objects which allows easy switching from an active position to an inactive position (and vice versa) without requiring great effort on the part of the user.

[0032] Another object of the present application is to provide a table top for supporting one or more objects which can be adapted to most types of chair and / or armchair currently on the market.

[0033] Still another object of the present application is to provide a table top for supporting one or more objects which can be easily installed as an additional accessory in a previously made chair and / or armchair structure, to adapt the latter to specific needs which have arisen after its manufacture / sale.

[0034] An important object of the present application is to provide a table top for supporting one or more objects which, when defined as an additional accessory to a chair structure, occupies a minimum amount of space, thus optimizing packaging and reducing transport costs.

[0035] These objects, together with other objects that will become clear hereinafter, are achieved by a table top for supporting one or more objects according to claim 1.

[0036] Other objects, which will be better illustrated hereinafter, are achieved by a table top for supporting one or more objects according to the dependent claims.

[0037] Furthermore, the above objects are also achieved by a chair structure according to claim 15. BRIEF DESCRIPTION OF DRAWINGS

[0038] The advantages and features of the present application will become clear from the following detailed description of some preferred, but not limiting, configurations of a table top for supporting one or more objects, with particular reference to the following drawings, in which: Figure 1 is a perspective view from below of the table top in an initial configuration according to the present application; Figure 2 is Figure 1 is a plan view of the table top in the intermediate configuration; Figure 3 is Figure 1 is a perspective view of a detail in the early stage of the table top in the intermediate configuration; Figure 4 is Figure 3 is a schematic plan view of the shaped seat visible in the intermediate configuration; Figure 5 is a schematic plan view of a second detail from Figure 1 ; Figure 6 is Figure 4 is a sectional view of a detail during rotation; Figure 7 is Figure 1 is a cross-sectional side view of the table top in the intermediate configuration; Figure 7 bis is a sectional view of the table top in another embodiment configuration according to the present application; Figure 8 is Figure 1 is a perspective view of a detail in the early stage of the embodiment; Figure 9 is Figure 8 is a perspective view of the same detail of a second embodiment of the intermediate configuration; Figure 10 is a cross-sectional side view of the table top in a second embodiment configuration according to the present application; Figure 11 is a cross-sectional side view of the table top in a third embodiment configuration according to the present application; Figure 12 is a cross-sectional side view of the table top in a fourth embodiment configuration according to the present application; Figures 13 to 16 is a schematic view of a plurality of configurations for connecting the table top of the present application to a chair structure. DETAILED DESCRIPTION

[0039] The present application relates to a support table top for supporting one or more objects, indicated as a whole with the reference 1 in the accompanying drawings.

[0040] The table top 1 to which the present application relates is of the type that can be anchored to a chair or armchair structure, in order to provide support for various types of objects for a seated user or to provide assistance when the user is intended to perform certain specific activities.

[0041] In particular, the table top 1 is able to support tools for writing or reading, such as books, notebooks, pens or electronic devices with the same functions (such as laptops, smartphones, tablets, e-readers / writers, etc.).

[0042] More generally, the purpose of the table top 1 is to provide support for a plurality of objects to a user seated on a chair / armchair. The size and weight of these objects can vary from a few grams to several kilograms.

[0043] Furthermore, the present table top 1 can be arranged to be integrated from the outset into the chair / armchair structure, that is, the chair / armchair can be considered as a finished product, comprising both the structure (i.e. frame, seating area, upholstery, etc.) and the table top of the type described here, anchored to the structure, at the time of its manufacture.

[0044] However, it is possible to consider the subject table top 1 of the present invention as an object in itself, in which case the table top 1 can be considered as an accessory independent of the chair structure, which can be anchored to the chair on demand.

[0045] In this way, the table top 1 represents an object that can be produced and marketed separately, which can be used to perfect even after the chair / armchair structure has been sold and installed.

[0046] Furthermore, the table top according to the present invention can be applied to a chair or armchair structure having a seating area that is symmetrical with respect to a plane passing through the median line thereof. Such a plane is indicated in the figures with the letter M. Figures 13 to 16

[0047] A first embodiment of the table top manufacturing will be described below, which can be seen in the figures Figures 1 to 9 .

[0048] Conveniently, the table top comprises a shelf 2 adapted to house one or more objects.

[0049] As mentioned previously, the shelf 2 can be arranged to support various objects, such as books, notebooks, writing materials, electronic devices, etc.

[0050] In general, the shelf 2 can present a parallelepiped with a predetermined planar shape.

[0051] In this way, the shelf 2 can have an upper surface 3 of relatively large area for supporting one or more objects and a relatively small thickness s1 so as not to interfere with the user's body parts during use.

[0052] In the table top example shown in the figures, the shelf 2 has a substantially square planar shape, although other shelf geometries are possible (for example, circular).

[0053] The median plane can be seen in Figure 2 ​and indicated with the reference symbol π-π.

[0054] Conveniently, the table top 1 comprises a hinge 4 intended to be associated with the shelf 2.

[0055] In particular, the hinge 4 can be anchored to the lower surface 5 of the shelf 2.

[0056] To this end, it can be facilitated that the hinge 4 is connected to the lower surface 5 of the shelf 2 near the square vertices that define the planar shape of the shelf 2.

[0057] Furthermore, the table top 1 involves the use of a support element 6 having a predetermined shape and end portions 7, 8 connected to the hinge 4 and to a chair / armchair structure intended to contain the table top 1, respectively.

[0058] In a particular embodiment of the present application, the end portion 8 of the support element 6, intended to be anchored to a chair / armchair structure provided with a pneumatic cylinder, can consist of a section of pipe for engaging with a substantially cylindrical, rotatable, slightly conical element (not shown in the figures). This cylindrical / rotatable / conical element can in turn be configured to be inserted into the end portion of a pneumatic cylinder of a chair structure, which in turn slides within a cavity formed on a central support of the structure adapted to support the seating area.

[0059] From Figure 7 It can be most clearly seen that the hinge 4 is arranged both to be connected to the shelf 2 and to the support element 6 (at the end portion 7 of the support element 6).

[0060] In the configuration of the table top 1 visible in the figures, the support element 6 is tubular and the hinge 4 provides a sleeve 9 adapted to be fitted over the end portion 7 of the tubular support element 6.

[0061] Furthermore, the hinge 4 comprises an enlarged central portion 10, generally having a substantially circular planar shape, which is connected to the sleeve 9 and has an upper surface 11 intended to contact the lower surface 5 of the shelf 2.

[0062] Furthermore, an elongated pin 12 is also provided, which is adapted to fix the central portion 10 of the hinge 4 to the shelf 2. In particular, the elongated pin 12 has two opposite ends, of which an end portion 13 interacts with the central portion 10 of the hinge 4 and an end portion 14 interacts with the shelf 2.

[0063] Conveniently, the hinge 4 can be mounted on the end portion 7 of the support element 6 so as to present a degree of freedom of rotation about a predetermined first rotation axis R1.

[0064] In particular, the first rotation axis R1 is substantially coaxial with the sleeve 9 fitted over the end portion of the support element 6.

[0065] During rotation about the first axis R1, the support element 6 remains fixed, while the hinge 4 rotates with respect thereto. Consequently, the sleeve 9 and the central portion 10 of the hinge 4 also rotate simultaneously with respect to the support element 6.

[0066] When the hinge 4 rotates about the first rotation axis R1, the shelf 2 is also pulled into rotation due to its connection with the hinge 4, thus facilitating the rotation of the shelf 2 itself between the non-working position (on which various objects cannot be placed) and the working position (on which the user can place objects on the upper surface 3 of the shelf 2).

[0067] In general, the hinge 4 can rotate about the first rotation axis R1 through an angular range Δ1 not less than 90°.

[0068] In the non-working position, the shelf 2 has the smallest occupied space and is spaced apart from the seating area of the chair / armchair structure (usually arranged next to the seating area).

[0069] In this position, the user has unimpeded access to the seating area and can sit down and stand up from the chair / armchair without interfering with the shelf 2.

[0070] In the working position, the shelf 2 is arranged above the seating area so as to be located in front of the user's torso when seated on the chair / armchair.

[0071] In this position, the user is able to place objects on the upper surface 3 of the shelf 2, while the hinge 4 (anchored to the lower surface 5 of the shelf 2) is directed downwards, i.e. towards the user's legs.

[0072] Considering the chair / armchair placed on the ground, in the non-working position the shelf 2 can be substantially orthogonal to the ground (i.e. the shelf assumes a substantially vertical position), while in the working position the shelf 2 can be substantially parallel to the ground (i.e. assumes a substantially horizontal position).

[0073] Therefore, the angular interval between the working position and the non-working position is approximately 90°.

[0074] From Figure 2 It can be most clearly seen that the shelf 2 is anchored to the hinge 4 in such a way that the first rotation axis R1 lies on the π-π median plane, in other words the direction of the median plane π-π is set so as to contain all the points defining the first rotation axis R1.

[0075] In this way, the shelf 2 is symmetrical with respect to both the median plane π-π and the first rotation axis R1.

[0076] Suitably, the shelf 2 can be rotated between the working and non-working positions as a result of an operation taken by the user on an element of the table top 1.

[0077] Suitably, the elongated pin 12 connecting the hinge 4 and the shelf 2 can be considered as a rotation pin of the shelf 2 itself. In this way, the shelf 2 can rotate with respect to the hinge 4 about a second rotation axis R2 passing through the elongated pin 12.

[0078] The second rotation axis R2 is substantially orthogonal to the first rotation axis R1.

[0079] For example, the first rotation axis R1 can be substantially horizontal (i.e. parallel to the ground), while the second rotation axis R2 can be substantially vertical when the shelf is in the working position.

[0080] The shelf 2 can rotate about the second rotation axis R2 with a predetermined angular travel Δ2.

[0081] For example, from Figure 5 It can be most clearly seen that the angular travel Δ2 of the shelf 2 about the second rotation axis R2 can be comprised between 120° and 300°.

[0082] The angular travel Δ2 of the shelf 2 about the second rotation axis R2 can be substantially symmetrical with respect to the first rotation axis R1.

[0083] In fact, with reference to the first rotation axis R1, the angular travel Δ2 of the shelf 2 about the second axis R2 can be considered as the sum of two angles a and a' formed with respect to the first rotation axis R1, Δ = |a| + |a'|.

[0084] The modulus of the angles a, a' are substantially equal to each other, but the end points are located on opposite sides of the first rotation axis R1 (thus, the rotation of the shelf 2 with respect to the first rotation axis R1 can be defined, respectively, between the two end points on the left and right of the first rotation axis R1). Figure 5 With reference to the images in

[0085] Conveniently, the support element 6 supporting the shelf 2 and the hinge 4 can be anchored to the chair / armchair structure in a rotatable manner.

[0086] In particular, the support element 6 can be anchored to the chair / armchair structure close to the central rod supporting the seat, or to another structural element of the chair / armchair (for example a support leg).

[0087] The end 8 of the support element 6 is anchored to the chair / armchair structure in such a way as to define a constraint with respect to the upward or downward translation. However, this end 8 is connected in a rotatable manner with respect to the chair / armchair structure so as to allow the rotation of the support element 6 about a third rotation axis R3.

[0088] The third rotation axis R3 passes through the end 8 of the support element 6 anchored to the chair / armchair structure and is substantially parallel to the second rotation axis R2 when the shelf 2 is in the working position.

[0089] In general, the third rotation axis R3 can be substantially vertical.

[0090] Furthermore, the support element 6 will be able to rotate without constraints with respect to the third rotation axis R3, i.e. with an angular travel Δ3 of 360°.

[0091] Suitably, the support element 6 can consist of a pair of shaped arms 15, 16, one of which 15 has an end 7 anchored to the hinge 4, while the other 16 has an end 8 anchored to the chair structure.

[0092] From Figure 1 It can be most clearly seen that the arm 16 anchored to the chair / armchair structure is placed below the arm 15 for supporting the hinge 4 and the shelf 2.

[0093] Both arms 15, 16 have a substantially "L" shape, i.e. each arm is defined by a pair of portions connected to each other and extending along mutually orthogonal directions.

[0094] Suitably, the arms 15, 16 can be formed by tubes bent in a substantially "L" shape.

[0095] The arm 15 also has an end 19 intended to be connected with an end 20 of the other arm 16.

[0096] The connection of the ends 19, 20 of the pair of arms 15, 16 is of the rotating type, i.e. each arm 15, 16 can rotate with respect to the other about a fourth rotation axis R4 passing through the connected ends 19, 20.

[0097] In general, the portions of the arms 15, 16 containing the ends 19, 20 are substantially straight so as to define, along their extension direction, a fourth rotation axis R4 substantially parallel to the third rotation axis R3.

[0098] In general, the third rotation axis R3 is substantially vertical.

[0099] Furthermore, the rotation of the arms 15, 16 with respect to the fourth rotation axis R4 can occur freely and without constraints, i.e. the upper arm 15 anchored to the hinge 4 can rotate with respect to the lower arm 16 connected to the chair / armchair structure with a range Δ4 of 360°.

[0100] The configuration of the above-described table top 1 makes it possible for the shelf 2 to rotate around four rotation axes in a controlled and selective manner: The shelf 2 can rotate about the first rotation axis Rl so as to assume a working position or a non-working position; The shelf 2 can rotate about a second rotation axis R2 with respect to the hinge 4; The shelf 2 can rotate about a third rotation axis R3 with respect to the chair / armchair structure; The shelf 2 can rotate about a fourth rotation axis R4 with respect to the arm 16 of the support element 6 anchored to the chair / armchair structure.

[0101] The connection of the table top 1 to a chair structure of the type described above provides the maximum number of degrees of freedom for the movement of the shelf 2. In these conditions, the shelf can be positioned on the left or right side of the user (rotation about axis R3) and can be moved closer or further away from the user by means of the free rotation about axes R2 and R3. Finally, the shelf 2 can be selectively positioned in the working / non-working position by means of the rotation about axis R1.

[0102] Furthermore, the table top 1 comprises a constraint device 21 adapted to facilitate the selective locking / unlocking of the shelf 2 in the working position.

[0103] The constraint device 21 is configured to keep the shelf 2 in the working position during the use of the table top by the user, preventing the table top from returning autonomously and suddenly to the non-working position.

[0104] As will be more fully described later in this description, the constraint device 21 is adapted to allow the transition of the shelf 2 from the working position to the non-working position only when the user takes voluntary action on certain components of the table top 1.

[0105] The constraint device 21 comprises a pin 22 anchored on the support element 6 close to the end 7 of the support element 6 intended to be connected to the hinge 4.

[0106] In the configuration of the table top 1 illustrated, the pin 22 is inserted inside a hole 23 formed on the tubular arm 15 connected to the hinge 4. Figures 1 to 9 In the configuration of the table top 1 illustrated, the pin 22 is inserted inside a hole 23 formed on the tubular arm 15 connected to the hinge 4.

[0107] The fixing pin 22 can be inserted inside a hole formed on the support element 6, not visible in the figures. The length of the fixing pin 22 will be chosen so that it has a portion 24 protruding from the support element 6.

[0108] Furthermore, the direction of the hole will be set so as to allow the protruding portion 24 of the fixing pin 22, after insertion, to be oriented towards the shelf 2 when the latter is in the working position.

[0109] In general, the protruding portion 24 of the fixing pin 22 is oriented upwards, so that it faces the shelf 2 when the latter is in the working position.

[0110] From the configuration of the table top 1 illustrated, it is clear that the protruding portion 24 of the fixing pin 22 is oriented upwards, so that it faces the shelf 2 when the latter is in the working position. Figure 7As can be seen most clearly, the hole is formed at a selected position on the support element 6, such that the pin 22 is placed at the central portion 10 of the hinge 4, i.e., downstream of the sleeve 9.

[0111] In addition, the constraint device 21 includes a forming seat 25 formed at the hinge 4.

[0112] Such a seat 25 can be formed on the enlarged portion 10 of the hinge 4.

[0113] Conveniently, the forming seat 25 can be open, that is, it can be formed on the enlarged central portion 10 of the hinge 4 so that only the side walls 26, 26' exist and there is no bottom wall.

[0114] The forming seat 25 can be formed at the enlarged position 10 of the hinge 4 in an area suitable for interacting with the protrusion 24 of the retaining pin 22.

[0115] In the following text of this specification, unless otherwise stated, the term "protruding portion of the retaining pin" will be used as a synonym for "retaining pin" because the interaction between the pin and other components of the table can only occur at the portion of the pin that protrudes from the support element.

[0116] Conveniently, since the forming seat 25 does not form a bottom wall, the retaining pin 22 is allowed to be inserted through, as from... Figure 7 The cross-sectional view can be seen most clearly as such.

[0117] Specifically, in Figure 7 In the configuration of the present invention shown, the extension of the fixing pin 22 protruding from the support element 6 is greater than the height of the seat 25. When the pin is inserted into the seat 25, the latter is completely passed through by it, and the end of the pin 22 protrudes from the upper edge 27 of the seat.

[0118] Specifically, two distinct parts of the seat 25 can be identified, each having a predetermined shape and size. The combination of these parts gives the seat 25 a predetermined shape, which is selected to facilitate locking / unlocking of the hinge 4 relative to its rotation about a first axis of rotation R1, as will be better explained below.

[0119] First, the first part 28 has a width w2, which allows the retaining pin 22 to be inserted.

[0120] However, the width l2 of the first part 28 of the seat 25 is slightly larger than the diameter D1 of the fixing pin so that it can be inserted with a smaller gap.

[0121] The length l2 of the first pin 28 will be chosen to be slightly larger than the radius (D1 / 2) of at least pin 22.

[0122] For example, when the diameter of the fixing pin is between 5mm and 10mm, the extension of the first seat can be between 7mm and 20mm.

[0123] Furthermore, the first portion 28 of the seat 25 has a straight extension that is substantially parallel to the first axis of rotation R1.

[0124] The seat 25 also has a second part 29, which also has a predetermined shape; however, the second part 29 is in communication with the first part 28.

[0125] Typically, the second part 29 of seat 25 can also be straight.

[0126] Furthermore, the second part 29 may have a width w3 slightly larger than the diameter D1 of the retaining pin 22 (so as to allow it to be inserted therein), and its length l3 is chosen to be at least equal to the length of the portion of the pin 22 protruding from the upper edge of the seat 25.

[0127] For example, if the diameter of the fixing pin 22 is between 5mm and 10mm and the total length is between 15mm and 25mm, then the width w3 of the second part 29 can be slightly greater than 5mm to 10mm and the length l3 can be not less than 30mm to 50mm.

[0128] Appropriately, the second part 29 of the seat 25 may extend in a direction perpendicular to the direction of extension of the first part 28 of the seat 25.

[0129] Specifically, in Figures 1 to 9 In the tabletop configuration shown, the second part 29 of the seat 25 extends along directions orthogonal to the first rotation axis R1 and the second rotation axis R2, respectively.

[0130] Furthermore, the first part 28 can be connected to the second part 29 of the seat 25 at the center line of the second part 29 of the seat 25.

[0131] In this case, seat 25 can have a generally "T" shaped plan view, which is formed by two orthogonal and interconnected parts represented by first part 28 and second part 29.

[0132] Furthermore, the first part 28 is parallel to the first rotation axis R1, therefore π The π plane can be the plane of symmetry of the shelf 2, or it can be the plane of symmetry of the "T" shaped seat 25.

[0133] from Figure 4 It can be clearly seen that seat 25 is relative to π. π is symmetric in the plane (as are Part 1, 28, and Part 2, 29, also relative to π). (Similar to π-plane symmetry).

[0134] As will be better explained later in this specification, the hinge 4 is movable relative to the retaining pin 22 to facilitate selective insertion of the retaining pin 22 into the first portion 28 and the second portion 29 of the seat 25 (and vice versa).

[0135] When pin 22 is inserted into the first part 28 of seat 25, the gap between the two elements is so small that hinge 4 is locked and cannot rotate about the first axis of rotation R1.

[0136] In this situation, if the user applies a rotational torque about the first axis R1 to the shelf, the outer surface 30 of the fixing pin 22 will immediately abut against the side wall 26 of the first part 28 of the seat 25.

[0137] The contact between the outer surface 30 of pin 22 and the wall 26 of the first part 28 of seat 25 constrains the rotation of hinge 4 about the first rotation axis R1.

[0138] Therefore, the retaining pin 22 is inserted into the first part 28 of the seat 25 to lock the hinge 4 and the shelf 2 connected thereto to rotate about the first axis R1, thereby forcing the two elements to remain in their position even when the user intends to apply rotation about the same axis R1.

[0139] Properly, when the shelf 2 is in the working position, the retaining pin 22 is inserted into the first part 28.

[0140] When the retaining pin 22 is inserted into the second part 29 of the seat 25, the hinge 4 can rotate freely about the first axis of rotation R1.

[0141] In this case, if the user applies a torque to the hinge 4 to promote its rotation about the first axis R1, the second part 29 rotates about the same axis R1 and about the pin 22, while the pin 22 remains fixed due to being constrained by the support element 6.

[0142] from Figure 6 As can be seen most clearly, during the rotation of the hinge 4 about the first axis R1, the angle β between the extension direction H of the second part 29 of the seat 25 and the pin 22 changes from an initial maximum of about 90° to a final minimum of about 0°.

[0143] During this rotation, the positioning of the second part 28 of the seat 25 relative to the fixing pin 22 actually changes in the manner described below.

[0144] At the start of rotation, the second part 29 is substantially perpendicular to the pin 22. However, as the hinge 4 rotates (clockwise or counterclockwise), the second part 29 moves toward the pin 22, causing it to become increasingly aligned with the latter.

[0145] At the end of the rotation, the second part 29 and the pin 22 are substantially parallel, so the angle β between the extending direction H of the second part 29 and the pin 22 is substantially zero. In this position, the pin 22 is fully contained within the second part 29.

[0146] During the rotation of the hinge 4, the pin 22 is always at least partially located within the second part 29 of the seat 25, meaning that the two elements are never disengaged.

[0147] However, the length l3 of the second part 29 of the seat 25 should be selected such that when the user applies clockwise or counterclockwise rotation to the hinge 4, the portion 24 of the pin 22 protruding from the support element 6 can be fully accommodated within the second part 29 without contacting the latter's wall 26' or edge 27.

[0148] Therefore, as described above, and since the pin 22 is inserted into the interior of the second part 29 of the seat 25 at the centerline, the length l3 of the second part 29 must be at least twice the relevant length l4 of the protrusion 24 of the fixing pin 22.

[0149] In this way, the hinge 4 will be able to rotate until the pin 22 is fully accommodated within the second part 29, thereby defining an angle β that is substantially zero with respect to the second part 29.

[0150] Appropriately, for the reasons stated above, when the retaining pin 22 is inserted into the second part 29 of the seat 25, the shelf 4 can rotate between the working and non-working positions (and vice versa).

[0151] In the working position, the extension direction H of the second part 29 of seat 25 is substantially orthogonal to pin 22, while in the non-working position, the extension direction H is substantially parallel to pin 22.

[0152] Since the second part 29 of seat 25 is essentially relative to the plane of symmetry π passing through it... Because it is π-symmetric, the rotation of hinge 4 between the working and non-working positions (and therefore the rotation of shelf 2) can have two directions of rotation (clockwise / counterclockwise).

[0153] In addition, the tabletop includes an actuation device 31 adapted to facilitate controlled movement of the hinge 4 and / or the pin 22 relative to the support element 6, so as to facilitate selective insertion of the retaining pin 22 into a first portion 28 of the seat 25 or into a second portion 29 of the seat 25.

[0154] In other words, the actuating device 31 can facilitate the movement of the seat 25 obtained on the hinge 4 in order to determine which of the two parts 28, 29 the retaining pin 22 is inserted into.

[0155] As described above, when the retaining pin 22 is inserted into the first part 28 of the seat 25, the shelf 2 is in the working position and the hinge 4 is locked and cannot rotate; while when the retaining pin 22 is inside the second part 29 of the seat 25, it can facilitate the rotation of the shelf 2 about the first rotation axis R1 between the working and non-working positions.

[0156] The drive unit 31 is activated by the user to facilitate the selective switching of the shelf 2 from the working position to the non-working position.

[0157] In fact, in order to unlock the rotation of the shelf 2 in the working position, the user is required to interact with the actuator 31 to apply a controlled movement to the hinge 4, which is adapted to facilitate the fixed pin 22 from the first part 28 of the seat 25 through to the second part 29 of the seat 25.

[0158] In the table configuration shown in the figure, the seat 25 has a generally "T" shape formed by the first part 28 and the second part 29, which are offset along the first axis of rotation R1.

[0159] Therefore, the actuation device 31 can be configured to facilitate selective translation of the hinge 4 relative to the fixed pin 22 in a direction substantially parallel to the first axis of rotation R1.

[0160] refer to Figure 3 Compared to the second part 29 of the seat 25, the first part 28 of the seat 25 is in the forward position (i.e. facing the sleeve 9).

[0161] Therefore, in this case, the actuation device 31 allows the hinge 4 to translate along the first rotation axis R1 with a predetermined stroke, which is sufficient to allow the pin to be inserted into the two parts 28, 29 of the seat 25.

[0162] Specifically, in order to facilitate the movement of pin 22 from the first part 28 to the second part 29, it is necessary to make the hinge translate along the first axis R1, the direction of which promotes the second rotation axis R2 to move closer to the fixed pin 22.

[0163] Conversely, in order to facilitate the movement of pin R1 from the second part 29 of seat 25 to the first part 28 of seat 25, it is necessary to make the hinge translate in the opposite direction of the first axis R1, that is, to facilitate the movement of the second axis of rotation R2 away from the fixed pin 22.

[0164] The force applied by the user to the shelf 2 promotes the translation of the hinge along the first axis R1. The anchoring of the shelf 2 to the hinge 4 allows the force generated by the user to be transmitted to the hinge 4 in order to promote its translation relative to the first axis R1.

[0165] Conveniently, the actuation device 31 may include a spring 32, the end 34 of which acts on the hinge 4, and the opposite end 33 of which acts on the support element 6 or the fixing pin 22.

[0166] from Figure 7 As can be seen most clearly, the function of spring 32 is to hold hinge 4 in the reference position.

[0167] Specifically, spring 32 acts on hinge 4 to retain pin 22 inserted inside the first portion 28. In other words, spring 32 enables hinge 4 to hold shelf 2 in the working position by preventing pin 22 from sliding out of the first portion 28 of seat 25 without voluntary action by the user on actuation device 31.

[0168] Therefore, the function of spring 32 is to prevent shelf 2 from accidentally and unintentionally switching from the working position to the non-working position.

[0169] In the preferred tabletop configuration, the spring 32 is inserted into the receiving portion 35, which is partially formed on the hinge 4 and partially formed by the internal tubular cavity of the support element 6.

[0170] A bushing 36 may be specified for use, which is designed to be inserted into the tubular cavity of the support element 6 (typically consisting of the arm 15 of the support hinge 4).

[0171] Spring 32 can be fitted onto bushing 36, and bushing 36 may include stop wall 37 for end 33 of the same spring 32.

[0172] When the first part 28 of seat 25 is upstream relative to the second part 29 (e.g.) Figure 7 As shown), spring 32 is preloaded and compressed to apply an outward force to hinge 4, which is adapted to promote the movement of the second axis of rotation R2 away from pin 22.

[0173] Under these conditions, when shelf 2 is in the working position, pin 22 remains inside the first part 28 of insert seat 25.

[0174] In an alternative embodiment of the invention, a preloaded spring 32 may be considered, in which case portions 28, 29 of the seat 25 and Figure 7 The situation is the opposite, that is, the second part 29 is located upstream of the first part 28.

[0175] The preloaded spring 32 allows for the application of an inward guiding force, which promotes the approach of the second rotation axis R2 relative to the pin 22.

[0176] Therefore, in the same case, when the shelf 2 is in the working position, the pin 22 remains inside the first part 28 of the insert seat 25.

[0177] Finally, Figures 1 to 9 In the tabletop configuration shown, it is possible to consider using a tabletop arranged inside the tubular support element 6 on the side opposite to pin 22 (i.e., with...). Figure 7 Spring 35 is visible on the opposite side of the configuration.

[0178] Alternatively, a simplified embodiment of the actuation device 31 may be provided, in which the spring 32 is housed inside the tubular cavity of the support element 6; in this case, the end of the spring 33 is adapted to contact the portion of the pin 22 inserted into the tubular arm.

[0179] Conveniently, the actuation device 31 includes a shaped recess 38 formed in the shelf 2.

[0180] Specifically, the recess 38 allows insertion of the end 24 of the retaining pin 22 protruding from the forming seat 25.

[0181] A recess 38 is formed on the lower surface 5 of the shelf 2 on which the hinge 4 is mounted.

[0182] The rotation of shelf 2 about the second axis of rotation R2 promotes the subsequent rotation of recess 38 about fixing pin 22.

[0183] In a tabletop configuration not shown in the figure, the size and shape of the recess 38 can be selected such that when it rotates about the second axis R2 for most of the angular stroke Δ2, no edge or wall of the recess will contact the retaining pin 22.

[0184] exist Figure 8 and Figure 9 In the alternative embodiment shown (however, it represents one of several embodiments of the recess 38), a semi-circular edge 39 is provided, which is intended to contact the outer surface 30 of the retaining pin 22 when the shelf 2 rotates about the second axis of rotation R2.

[0185] A potential advantage associated with the presence of the contact edge 39 is the creation of a small central notch 44 thereon, which is adapted to removably engage with the end of the pin 22 inserted into the recess 38 to define a reference point during rotation of the shelf 2 about the second axis of rotation R2. For example, the notch 44 could be positioned at the centerline of the edge 39 (to indicate to the user the starting position of the symmetrical rotation of the shelf 2 relative to axis R2). Alternatively, the notch 44 could be positioned near the ends 41, 42 of the edge 39 to indicate to the user that the shelf 2 is about to transition from an active position to a passive position.

[0186] Therefore, in this case, the semi-circular surface 39 defining the recess 38 will slide on the fixing pin 22 during the rotation of the shelf 2 about the second axis of rotation R2.

[0187] Alternatively, the shaped recess 38 may include a semi-circular groove defined by a pair of parallel edges, the semi-circular groove being adapted to receive the end of the retaining pin 22 therein.

[0188] During the rotation of shelf 2, one or both edges defining the groove may contact the outer surface 30 of retaining pin 22 so as to slide relative to it.

[0189] Figure 9 The diagram shows the configuration of the recess 38 containing the groove.

[0190] Preferably, the actuation device 31 may include at least one guide surface 40, which is adapted to interact with the retaining pin 22 when the shelf 2 reaches an angular travel Δ2 close to its maximum value during rotation about the second axis R2.

[0191] Typically, the actuation device 31 includes a pair of guide surfaces 40: one such guide surface 40 is adapted to interact with the pin 22 when the shelf 2 rotates clockwise, and the other such surface 40 is adapted to interact with the pin 22 when the shelf 2 rotates counterclockwise.

[0192] The guide surfaces 40 may be substantially straight and are all oriented to converge at a point P toward the center of the shelf 2, so as to promote a reduction in the distance between the retaining pin 22 and the second axis of rotation R2 during the rotation of the shelf 2.

[0193] In the tabletop configuration shown in the figure, the ends 41 and 42 of the straight guide surface 40 coincide with the endpoints of the semi-circular edge of the recess.

[0194] When the user applies force to the shelf 2, causing it to rotate about the second axis of rotation R2, the semi-circular edge 39 of the recess 38 slides on the outer surface 30 of the pin 22 (without any change in the distance between it and the second axis of rotation R2) until it reaches one of its ends 41, 42.

[0195] If the user applies force to the shelf 2 to promote its rotation beyond the ends 41, 42 of the semi-circular edge 39, the guide surface 40 near the pin 22 begins to slide on the outer surface 30 of the pin 22, thereby causing the pin 22 to move closer to the second axis of rotation R2.

[0196] However, the guide surface 40 has a straight rather than semi-circular path and terminates at the end 43 of the stop suitable for forming the pin 22, which faces inward from the shelf 2 and is arranged opposite the end of the semi-circular edge 38.

[0197] This configuration of the guide surface, in addition to causing the shelf 2 to rotate about the second rotation axis R2, also causes the shelf 2 itself to translate in a direction parallel to the first rotation axis R1.

[0198] In other words, the sliding (straight and converging inward) of the guide surface 40 of the above type on the fixing pin 22 changes the motion borne by the shelf 2, transforming it from a pure rotational motion relative to the second rotation axis R2 into a rotational translational motion relative to the second rotation axis R2 and the first axis R1.

[0199] When the guide surface 40 slides relative to the pin 22, the hinge 4 undergoes a translational movement in a direction parallel to the first axis of rotation R1. Therefore, the pin 22 itself can be selectively inserted into the first part 28 or the second part 29 of the seat 25.

[0200] If the guide surface 40 slides on the pin 22, and its sliding direction causes its end 43 to approach the pin, the hinge translates along the first axis R1, and its translation direction causes the second rotation axis R2 to approach the fixed pin 22.

[0201] During this translational movement of the hinge, pin 22 gradually protrudes from the first part 28 of seat 25 to be inserted into the second part 29.

[0202] Conversely, when the guide surface 40 slides on the pin 22 to move the latter away from its end 43, the hinge can translate along the first axis R1 (retracted by the spring 32) in a direction that moves the second axis of rotation R2 away from the fixed pin 22.

[0203] In this case, if the pin 22 is once again aligned with the first part 28 of the seat 25 due to the rotation of the shelf 2 about the axis of rotation R2, such pin 22 tends to gradually protrude from the second part 29 of the seat 25 to fit into the first part 28.

[0204] For the reasons mentioned above, the user-inducing rotation at the shelf 2 facilitates the automatic translation of the hinge 4, allowing the retaining pin 22 to selectively engage either the first portion 28 or the second portion 29 of the seat 25.

[0205] In this way, by rotating shelf 2 without directly acting on the hinge, the user can lock the component so that it cannot rotate (inactive position) or allow it to rotate about the first rotation axis R1 (from active position to inactive position).

[0206] A different configuration of the groove 38 than described above can be provided, characterized by an asymmetrical geometry (this configuration is not shown in the figures). The asymmetrical groove 38 involves a single guide surface 40 formed at the right end 41 or left end 42 of the semi-circular edge 39. In this case, automatic translation of the hinge 4 is facilitated only when the user rotates the shelf in a direction suitable for bringing the guide surface 40 against the retaining pin 22.

[0207] Furthermore, in this configuration of the groove 38, a travel surface (not shown) that is substantially radial to the axis of rotation R2 can be made, and this travel surface can contact the retaining pin 22 when the user rotates the shelf 2 in a direction opposite to the direction that allows the guide surface 40 to abut against the pin itself.

[0208] The function of the travel surface is to limit the end stop when the shelf 2 rotates about the second rotation axis R2, when the rotation direction of the shelf 2 is opposite to the direction that brings the guide surface 40 closer to the pin 22.

[0209] If the user promotes the rotation of shelf 2 about axis R2 in a first direction of rotation (so that pin 22 is close to guide surface 40), an interaction is established between pin 22 and guide surface 40 at the end of this rotation to facilitate the transition of shelf 2 from the working position to the non-working position. Conversely, if the shelf rotates about axis R2 in the opposite direction, pin 22 contacts the travel surface at the end of the rotation, and therefore the shelf stops rotating at the limit end position of the travel surface.

[0210] Figures 1 to 9 The tabletop configuration shown involves the fabrication of a shaped base 25 that is substantially symmetrical with respect to the π-π symmetry plane.

[0211] More generally, seat 25 consists of a first part 28 and a second part 29, which extend along their respective substantially orthogonal directions, such that they form a plane relative to the π-π plane (in Figure 4 (See the image) A symmetrical "T" shape.

[0212] Specifically, the first part 28 of the seat 25 may extend along an extension direction parallel to the first rotation axis R1 (and lie on the π-π symmetry plane), while the second part 29 of the seat 25 extends along an extension direction orthogonal to the first rotation axis R1.

[0213] This configuration of seat 25, combined with the recesses of a pair of guide surfaces 40, allows shelf 2 to automatically switch from the working position to the non-working position when it rotates about the second rotation axis R2 in two rotational directions (clockwise and counterclockwise).

[0214] However, an alternative configuration of seat 25 can be provided, which allows it to automatically switch from the working position to the non-working position only when the shelf 2 rotates about axis R2 in a specific direction of rotation (clockwise or counterclockwise).

[0215] In this case, the seat 25 consists of a first portion 28 extending in a direction substantially parallel to the axis R1 and a second portion 29 extending in a direction orthogonal to the first portion 28, thereby defining a seat 25 that is substantially "L" shaped in the plane.

[0216] Therefore, in this case, the shelf 2 only changes from the working position to the non-working position when the shelf 2 rotates in the direction of the second part 29 that allows the pin 22 to be inserted into the seat.

[0217] If the second part 29 of the roughly "L"-shaped seat 25 is located to the left of the first part 28 (relative to the top view, and the first part 28 is located at the bottom), then when the user rotates the shelf 2 clockwise about the second axis of rotation R2, the shelf 2 changes from the working position to the non-working position.

[0218] Conversely, if the second part 29 of the roughly "L"-shaped seat 25 is located to the right of the first part 28 (the first part 28 is at the bottom relative to the top view), then when the user rotates the shelf 2 counterclockwise about the second axis of rotation R2, the shelf 2 changes from the working position to the non-working position.

[0219] Conveniently, when the seat 25 is "L" shaped in the plane, the forming recess 38 can be asymmetrical (as described above) in order to create a single guide surface 40 positioned in a direction consistent with the direction that allows the pin 22 to be inserted into the second portion 29 of the seat 25.

[0220] The configuration of tabletop 1 described above also has a variation, such as... Figure 7 As shown.

[0221] This variant can be found at [link / reference]. Figure 7 bis (Note: bis is Latin for "two", referring to the second one here.) Figure 7 ).

[0222] Figure 7 bis The variants shown in the image are similar to those in the image. Figure 7 The variants shown are very similar (except for the configuration provided for pin 22).

[0223] In fact, in this case, the extension of pin 22 prevents it from protruding upward from the forming seat 25 (in particular, pin 22 does not protrude upward from either the first portion 28 or the second portion 29 of the seat 25).

[0224] in other words, Figure 7 bis The configuration shown does not include the protruding portion of pin 22 (in Figure 7 (In different embodiments, it is indicated by reference numeral 24). Conversely, the end of pin 22 is always contained within the forming seat 25 (and no portion is provided that protrudes outward from it).

[0225] Therefore, in Figure 7 bisIn this configuration, the selective switching between the first part 28 of the seat 25 (corresponding to the locking of the shelf 2 in the working position) and the second part 29 of the seat 25 (suitable for allowing the hinge 4 to rotate from the working position to the non-working position) is not facilitated by the interaction between the outer surface 30 of the pin 22 and the guide surface 40.

[0226] In fact, Figure 7 bis In this configuration, the transition of pin 22 from the first part 28 of seat 25 to the second part 29 of the same seat 25 can be manually facilitated by the user by applying force to the table 1 (or its components, such as shelf 2), thereby overcoming the resistance of spring 32 (i.e., by compressing it) to facilitate the translation of hinge 4 along axis R1, thus allowing the fixed pin 22 to engage the second part 29 of seat 25.

[0227] This force is Figure 7 bis The arrow F is used to represent this.

[0228] Due to the translation of pin 22 within the second part 29 of seat 25 (by manually applying force F), the user can facilitate the rotation of shelf 2 between working and non-working positions.

[0229] When the user promotes the rotation of shelf 2 in the opposite direction (from non-working position to working position), once such shelf 2 is in the working position, the force applied to the hinge 4 by the compressed spring 32 will cause the latter to translate in the opposite direction to that shown by arrow F, and promote the automatic conversion of pin 22 from the second part 29 of the seat to the first part 28 (in order to create a locking of shelf 2 in the working position).

[0230] As previously stated, this embodiment of the invention does not provide an interaction between pin 22 and guide surface 40.

[0231] Therefore, for this reason, Figure 7 bis The tabletop 1 shown relates to the manufacture of a solid type (i.e., without the recess 38) shelf 2.

[0232] In an alternative embodiment not shown in the figure, the tabletop 1 may have the same... Figure 7 bis The same configuration is shown, except that shelf 2 may also include recess 38. However, in this case, pin 22 does not interact with guide surface 40 and can be used with... Figure 10 The tabletop 1 shown in the embodiment has been described in the same manner that the movement of such a shelf 2 is facilitated.

[0233] In fact, the dimensions of pin 22 ensure that it remains inside seat 25 in any position (working, not working, switching between working / not working, and switching between not working / working), so that the end of pin 22 never interacts with shelf 2.

[0234] Figure 10 An alternative configuration of the tabletop of the present invention is shown.

[0235] Apart from the parts described in detail here, this different tabletop configuration is still of the type described above.

[0236] Specifically, Figure 10 The tabletop is provided with a pair of pins 22, 22' (both fixed relative to the support element 6), which are designed to interact with the forming seat 25 and the forming recess 38, respectively.

[0237] The first pin 22 is inserted into the interior of the seat 25, and its length prevents it from protruding from it. The function of the pin 22 is to rotatably lock / unlock the shelf 2 relative to the axis R1 when it is selectively inserted into the first part 28 or the second part 29 of the seat 25.

[0238] On the other hand, the second pin 22' interacts only with the recess 38 and does not pass through the seat 25. The second pin 22' has a longer length than the first pin 22, which is chosen so that its outer surface 30 can interact with the guide surface 40 obtained in the recess 38.

[0239] exist Figures 1-9 In the tabletop configuration shown, the rotational locking / unlocking of shelf 2 about the first rotation axis R1 and the selective translation of hinge 4 (to facilitate the conversion of shelf 2 between working and non-working positions) are no longer achieved by a single pin 22 (as shown). Figures 1 to 10 The configuration does not implement these functions; instead, they are implemented by a pair of pins 22 and 22'.

[0240] Similarly, in this case, the actuating device 31 has a spring 32 adapted to act directly on the hinge 4 to hold it in the default position, wherein the first pin 22 is inserted into the first portion 28 of the seat 25.

[0241] exist Figure 10 In the tabletop 1 configuration shown, the first pin 22 is fixed, that is, pin 22 is integral with the support element 6 and cannot be moved during use of the shelf (in this case, it is the hinge 4 that can translate and rotate relative to pin 22). Similarly, in Figure 11 In the tabletop configuration shown, the two pins 22, 22' are fixed and integrated with the support element 6 (the hinge 4 can translate and rotate relative to these pins 22, 22').

[0242] According to the present invention, an additional configuration for the tabletop 1 can be provided, which is best shown in Figure 12 and Figure 11 .

[0243] Apart from the parts described in detail here, this different tabletop configuration is still of the type described above.

[0244] In these configurations, a locking pin 47 and a single pin 22 movably mounted on the support element 6 are provided. The locking pin 47 is inserted into an opening 48 formed in the sleeve 9 to allow the hinge 4 to rotate about a first axis of rotation R1. The opening 48 also extends in a direction substantially parallel to the second portion 29 of the seat 25 to lock the hinge relative to translation along the first axis of rotation R1.

[0245] The support element 6 may include a single slot 45 or a pair of slots 45 extending in a direction substantially parallel to the first axis of rotation R1.

[0246] The groove 45 may be formed near the end 7 of the support element 6 that is connected to the hinge 4.

[0247] The pin 22 is inserted into the support element 6 through at least one slot 45. The pin 22 has an upper protrusion 24 (if a groove is provided) intended to be inserted into the slot 25 through and to protrude therefrom.

[0248] exist Figure 11 In the configuration shown, pin 22 is mounted on bushing 36 and can slide within a single groove 45 formed in support element 6. Therefore, in this configuration, pin 22 is movable relative to support element 6.

[0249] The sliding of pin 22 within groove 45 can be selective, as pin 22 can be translated in a direction parallel to the first axis of rotation R1 due to the action applied to it by actuation device 31.

[0250] Specifically, the spring 32 has two opposing ends, with end 33 interacting with the hinge 4 and the other end interacting with the bushing 36 (integrated with the pin 22).

[0251] Therefore, the action of the spring 32 will cause to promote the application of an outward guiding force to the pin 22 so as to hold the pin 22 inside the first part 28 of the seat 25.

[0252] exist Figure 12 In the illustrated configuration of the invention, the actuation device 31 provides the realization of the shaped recess 38. Therefore, when the shelf 2 rotates about the second axis of rotation R2 and the outer surface 30 of the pin 22 interacts with the guide surface 40, the spring 32 is compressed and the pin 22 slides in the groove 45, which will facilitate the selective insertion of the pin 22 into the second portion 29 of the groove 25.

[0253] The following describes Figure 11 The tabletop 1 shown is configured as shown.

[0254] In this configuration, a pair of openings 45 are provided, and the pin 22 has a lower end portion 46 protruding from the support element 6, which is intended to be gripped by the user. The support element 6 facilitates sliding movement of the pin 22 within the slot 45 relative to a direction parallel to the first axis of rotation R1.

[0255] In this way, by translating the pin 25 between the two extreme positions defined by them within the slot 45, the user will directly facilitate the selective insertion of the upper protrusion 24 of the pin 22 into the first portion 28 or the second portion 29 of the seat 25.

[0256] Specifically, when pin 22 is at its farthest limit position relative to the second rotation axis R2, it is inserted into the first part 28 of the seat 25, and when it is at its closest limit position relative to the second rotation axis R2, it is inserted into the second part 29 of the seat 25.

[0257] Therefore, in Figures 1-9 In the tabletop 1 configuration shown, the insertion of pin 22 into the first portion 28 or the second portion 29 of the seat 25 is not automatic during the rotation of shelf 2 about the second axis of rotation R2, as... Figure 12 As described in the configuration.

[0258] In fact, in this case, the conversion of pin 22 inside the first part 28 or the second part 29 of seat 25 occurs manually, as a result of the user previously grasping the lower part 46 of pin 22 and promoting the translation of pin 22 itself.

[0259] In this configuration, the groove 2 may also lack the guide wall 40 and may only include a travel wall that interacts with the upper portion 24 of the pin 22 to determine the end stop of the shelf 2 rotating about the second axis of rotation R2.

[0260] exist Figures 13 to 16 In the tabletop configuration shown, hinge 4 is fixed relative to support element 6, and the only movable element is pin 22. In other words, pin 22 can move relative to support element 6.

[0261] Then, the spring 32 of the restraint device 31 acts on the pin 22 to apply a force suitable for holding its upper end portion 24 inside the first portion 28 of the seat 25.

[0262] When the user intends to facilitate the sliding of pin 25 inside slot 45 (in order to insert the upper portion 24 of pin 22 into the second portion 29 of seat 25), it will have to overcome the opposing resistance provided by spring 32, and the conversion of pin 22 from the second portion 29 of seat 25 to the first portion 28 of seat 25 can be substantially automatic due to the elastic force exerted by spring 32 on pin 22 itself.

[0263] Figure 13 Some configurations are shown of mounting the aforementioned tabletop to a chair structure having a seating area that is substantially symmetrical with respect to the center plane M.

[0264] Figure 14 The configuration shown in the image illustrates the connection of the tabletop 1 to the chair structure via a straight support element 6, which lacks portions 15 and 16 and is rigidly connected to the chair structure itself.

[0265] In this case, shelf 2 can only rotate relative to two axes: the first axis of rotation R1 and the second axis of rotation R2.

[0266] exist Figure 15 In the embodiment shown, the tabletop 1 is connected to the chair structure via a support element 6, which consists of one of portions 15 and 16 and is mounted to be rotatable relative to a fourth axis of rotation R4.

[0267] exist Figure 16 In the embodiment shown, the tabletop 1 is connected to the chair structure via a support element 6, which consists of one of portions 15 and 16 and is mounted to be rotatable relative to a fourth axis of rotation R3.

[0268] In this case, shelf 2 can rotate relative to the first rotation axis R1, relative to the second rotation axis R2, and relative to the fourth rotation axis R3.

[0269] Finally, Figure 1 In the illustrated embodiment, it is schematically shown that ​ The tabletop 1 of the type shown is connected to the chair structure. Therefore, in this embodiment, the shelf 2 can selectively rotate about all rotation axes R1-R4.

[0270] This invention can be implemented in other variations within the scope of the claimed and described features, which may be replaced by different technically equivalent elements and materials. The shape and size of the invention can be arbitrary, provided that the shape and size are compatible with its mode of use.

[0271] The numbers and reference numerals in the claims and description are intended only to increase the clarity of the text and should not be construed as limiting the technical interpretation of the objects or processes identified by them.

Claims

1. A tabletop for supporting one or more objects, wherein, The tabletop can be anchored to a chair or armchair structure, and the tabletop includes: Shelf (2), said shelf (2) being adapted for placing one or more objects; A hinge (4) is anchored to the shelf (2) and adapted to rotate about a predetermined first axis of rotation (R1) to allow the shelf (2) to rotate selectively between a non-working position and a working position; Support element (6), the support element (6) having an end (7) connected to the hinge (4) and an end (8) connected to the chair or armchair structure respectively. A restraint device (21) adapted to facilitate selective locking and unlocking of the shelf (2) in the working position, the restraint device (21) comprising a pin (22) and a forming seat (25), the pin (22) being operably connected to the support element (6) and adjacent to an end (7) of the support element (6) connected to the hinge (4), the forming seat (25) being formed in the hinge (4) and allowing insertion of the pin (22), the forming seat (25) comprising: The first part (28) is adapted to allow the pin (22) to be inserted with a reduced gap in order to define a rotational constraint for the hinge (4) about the first axis of rotation (R1) and to lock the shelf (2) in the working position. The second part (29) has a predetermined length (l3) to allow the insertion of the pin (22), and the second part (29) of the seat (25) is adapted to selectively rotate about the first axis of rotation (R1) and about the pin (22) respectively during the rotation of the hinge (4) to allow the pin (22) to be partially or fully inserted into the second part (29) and to allow the shelf (2) to switch from the working / non-working position to the non-working / working position; An actuating device (31) adapted to facilitate controlled movement of the hinge (4) and / or the pin (22) relative to the support element (6) to facilitate selective insertion of the pin (22) into a first portion (28) or a second portion (29) of the seat (25); The shelf (2) is rotatably anchored to the hinge (4) so ​​as to selectively rotate relative to the hinge (4) about a second rotation axis (R2) that is substantially orthogonal to the first rotation axis (R1).

2. The tabletop according to claim 1, characterized in that, The first portion (28) and the second portion (29) of the forming seat (25) extend in directions that are substantially orthogonal to each other.

3. The tabletop according to one or more of the preceding claims, characterized in that, The shelf (2) is substantially symmetrical with respect to the plane of symmetry (π-π), in which the first axis of rotation (R1) is contained.

4. The tabletop according to claim 3, characterized in that, The second axis of rotation (R2) is located on the plane of symmetry (π-π), and the shelf (2) is capable of rotating about the second axis of rotation (R2) by a predetermined angular stroke (Δ2), which is substantially symmetrical with respect to the plane of symmetry (π-π).

5. The tabletop according to one or more of the preceding claims, characterized in that, The actuation device (31) is adapted to facilitate selective translation of the hinge (4) relative to the support element (6) in a direction substantially parallel to the first axis of rotation (R1).

6. The tabletop according to claim 5, characterized in that, The actuating device (31) includes a shaped recess (38) formed in the shelf (2), the pin (22) is inserted into the shaped seat (25) through, and has a portion (24) that is at least partially inserted into the shaped recess (38).

7. The tabletop according to claim 6, characterized in that, The actuating device (31) includes at least one guide surface (40) formed in the recess (38) and adapted to interact with the outer surface (30) of the pin (22) during rotation of the shelf (2) about the second axis of rotation (R2). The at least one guide surface (40) is slidable on the pin (22) during rotation of the shelf (2) to cause the shelf (2) and the hinge (4) to translate in a direction substantially parallel to the first axis of rotation (R1) by facilitating selective insertion of the pin (22) into the first portion (28) or the second portion (29) of the seat (25).

8. The tabletop according to one or more of claims 1 to 4, characterized in that, The actuating device (31) is adapted to move the pin (22) relative to the support element (6) in a direction substantially parallel to the first axis of rotation (R1).

9. The tabletop according to claim 8, characterized in that, The actuating device (31) includes at least one slot (45) formed on the support element (6) and near the end (7) of the support element (6) connected to the hinge (4), through which the pin (22) passes and is slidably inserted into the at least one slot (45), and has an end (46) operably gripped by a user for sliding between two extreme positions in the at least one slot (45), the extreme positions being adapted to define the pin (22) insertion into a first portion (28) or a second portion (29) of the forming seat (25).

10. The tabletop according to one or more of the preceding claims, characterized in that, The actuation device (31) includes a return spring (32) that acts on the pin (22) and / or the hinge (4) to apply a return force that is adapted to facilitate holding the retaining pin (22) within the first portion (28) of the seat (25).

11. The supporting tabletop according to one or more of the preceding claims, wherein, The chair structure has a seating area that is substantially symmetrical with respect to the center plane (M), characterized in that the support element (6) is rotatably anchored to the chair or armchair support structure, the support element (6) being rotatable about a third axis of rotation (R3) passing through the end (8) of the support element, the end (8) of the support element being anchored to the chair or armchair structure on the center plane (M) of the structure.

12. The tabletop according to one or more of the preceding claims, characterized in that, The support element (6) includes a pair of arms (15, 16) that are rotatable to each other and connected to each other at their respective ends (19, 20), the arms (15, 16) being rotatable to each other about a fourth axis of rotation (R4), which is substantially parallel to the second axis of rotation (R2) when the shelf (2) is in the working position.

13. The tabletop according to claim 12, characterized in that, One arm (15) of the pair of arms has an end (7) connected to the hinge (4), and the other arm (16) of the pair of arms has an end (8) anchored to the chair or armchair structure in a manner that allows it to rotate about the third axis of rotation (R3).

14. A chair structure comprising: A support frame defining a base, a seating area, and a backrest for placement on the ground; A support tabletop (1) is associated with the frame to selectively support one or more objects; The characteristic feature is that the supporting table (1) is of the type described in one or more of the preceding claims.

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