Folding chair frame with tray and folding chair

Abstract

Folding Chair Frame with Tablet and Folding Chair. The utility model relates to a folding chair frame with a tablet and a folding chair, in which the folding chair frame comprises a main body and a tablet; the main body includes a lower support and a main support frame, a connecting element is attached to the lower support, and the tablet is rotationally connected to the connecting element, so that the tablet has a usable state and a folded state that can be switched by rotation; in the usable state, the tablet is located outside the lower support; and in the folded state, the tablet is located in a storage space surrounded by the folded lower support or within the unfolded lower support. The folded tablet does not increase the overall footprint of the chair, thus avoiding the need to occupy additional storage space. Figure to be published with the abstract: FIG. 1

Description

Title of the invention: Folding chair frame with tablet and folding chair. Scope of the utility model

[0001] The present utility model relates to the technical field of folding chairs, and more particularly to a folding chair frame with a shelf and a folding chair. PRIOR TECHNOLOGY

[0002] With the continuous improvement of quality of life, people often need to go camping during their free time after work, and folding chairs are the necessary equipment. Folding chairs are small and take up little space when folded, making them easy to store and transport. In addition, prior art folding chairs are equipped with a shelf at one end, so that passengers can place various items on it, such as a cup, a mobile phone, food, etc.

[0003] However, although the existing tablet can also be folded, the folded tablet is located outside the folding chair, which increases the overall size of the folded chair and occupies more storage space. The present utility model proposes a folding chair to resolve the aforementioned problems. CONTENTS OF THE UTILITY MODEL

[0004] The utility model comprises a folding chair frame with a shelf and a folding chair. The shelf provided, when folded, does not increase the overall size of the folded chair, thus avoiding the need for additional storage space and making folding more convenient.

[0005] To this end, the present utility model provides the following technical solution:

[0006] a folding chair frame with a shelf, which includes a main body and a shelf;

[0007] in which the main body comprises a lower support and a main support frame, the lower support is connected to the main support frame, and both are foldable;

[0008] in which a connecting element is linked to the lower support, and the tablet is rotationally linked to the connecting element, so that the tablet has a state of use and a folded state, and the two states can be switched by rotation;

[0009] wherein, in the state of use, the tablet is located on an outer side of the lower support and serves to hold objects;

[0010] wherein, in the folded state, the tablet is located in a storage space surrounded by the folded lower support or in the unfolded lower support.

[0011] Preferably, the connecting element comprises a connecting piece, a rotating block and a connecting rod, one end of the connecting piece is mounted on the lower support, the other end is free, and the free end is located in the storage space surrounded by the folded lower support;

[0012] in which the rotating block is provided with a sliding hole, an axis of the sliding hole is perpendicular to a lateral face of the lower support, one end of the connecting rod slides and is rotatably arranged on the sliding hole, and the other end is connected to the tablet, so that the tablet can slide and rotate along the axis of the sliding hole;

[0013] in which the rotating block is arranged in a rotational manner at the free end of the connecting piece to rotate the tablet, in order to tilt the tablet between the outer and inner sides of the lower support.

[0014] Preferably, at least one communication groove is provided on the top of the shelf, a plurality of storage grooves have different shapes for storing objects of different shapes.

[0015] Preferably, the connecting piece is provided with an avoidance groove which cooperates with the connecting rod inside the main body.

[0016] Preferably, the lower support comprises a front support and a rear support, the two upper ends of the front support and those of the rear support are both rotatably connected to the main support frame, and a connecting rod assembly is rotatably connected at a central part of the two;

[0017] wherein the connecting piece is mounted in the middle of the rear support, and one end of the tablet, away from the rear support, is provided with a support groove which fits into the front support to support the tablet in use.

[0018] Preferably, the main support frame includes a backrest support, a leg support, a seat frame and two armrest supports;

[0019] in which the two upper ends of the front support and those of the rear support are rotationally connected to the two armrest supports, respectively;

[0020] in which the backrest support has two lower ends rotatably connected to two rear ends of the seat frame, respectively, a free upper end, and two lower parts rotatably connected to rear ends of the armrest support, respectively;

[0021] wherein the leg support has two upper ends rotatably connected to two front ends of the armrest support, respectively, a free lower end, and two upper parts rotatably connected to two front ends of the seat frame, respectively; and the connecting rod assembly is rotationally connected to the seat frame.

[0022] Preferably, the armrest support includes an armrest, a sliding bar and a locking assembly;

[0023] in which the front and rear ends of the armrest are rotationally connected to a lower part of the backrest support and to the upper end of the leg support, respectively, and the sliding bar is provided inside the armrest to support the armrest;

[0024] in which the locking assembly is provided to slide on the sliding bar to cooperate with the sliding bar, in order to lock the sliding bar;

[0025] in which the two upper ends of the front support and those of the rear support are rotationally connected to the locking assembly to support the sliding bar.

[0026] Preferably, the locking assembly comprises:

[0027] a sliding block which is provided to slide on the sliding bar;

[0028] a locking element which is provided on the sliding block;

[0029] in which the locking element comprises a locking block, a locking housing and an elastic element, the locking housing is provided on the sliding block, the locking block is provided on the locking housing, a locking portion is provided at an upper end of the locking housing and located above the sliding bar, and the elastic element is provided between an upper side wall of the locking housing and an upper end portion of the sliding block;

[0030] in which the locking block is used jointly with a lower side wall of the sliding block in order to cause the locking part to move downwards and to rest against an upper side wall of the sliding bar, and to cause the sliding block to move upwards and to rest against the lower side wall of the sliding bar under the action of the elastic element.

[0031] Preferably, one end of the locking block is provided with an eccentric wheel and is rotatably arranged on the locking housing, and the other end is free;

[0032] in which the locking housing is rotatably sleeved onto an outer periphery of the sliding block, and a notch is opened at the upper end of the sliding block, in communication with the sliding hole inside it, and the locking part moves downwards to engage with the upper side wall of the sliding block through the notch;

[0033] wherein a rotation axis of the locking block is located below the lower side wall of the sliding block, and a distance between the rotation axis of the locking block and the lower side wall of the sliding block is less than a maximum radius of the eccentric wheel.

[0034] A folding chair, which includes a chair canvas and a folding chair frame, in which the main support frame includes a backrest support, a leg support, a seat frame and two armrest supports;

[0035] the chair canvas is mounted on a working surface formed by the upper end surfaces of the backrest support, the seat frame and the leg support.

[0036] Compared to the prior art, the present utility model offers the following advantages:

[0037] The tablet has a folded state, and the chair frame has both a used state and a folded state. When the chair frame is folded, the tablet can rotate into the storage space defined by the folded lower support, so that, on the one hand, it can be concealed inside the folded lower support to prevent damage to the tablet during transport and ensure its quality; on the other hand, after the entire chair frame is folded, the tablet is located in the storage space defined by the folded lower support, so that, compared to existing folding chairs with a tablet, this does not increase the overall size of the folded chair. However, when the chair frame is in use, the tablet is located in the unfolded lower support, so as not to occupy the unfolded space and interfere with people's activities. BRIEF DESCRIPTION OF THE FIGURES

[0038] The accompanying figures necessary for describing the embodiments or the prior art are given by way of example, in order to better clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art. It is evident that they represent certain embodiments of the present utility model, and that a person skilled in the art is capable of obtaining other figures based on these figures, without any creative effort.

[0039] [Fig. 1] represents a general diagram of a folding chair frame (when the tablet is used) in the embodiment of the present utility model;

[0040] [Fig.2] represents a diagram of the tablet and the connecting element in the mode of realization of the present utility model;

[0041] [Fig.3] shows a diagram of the tablet, the connecting element and the support inferior in the embodiment of the present utility model;

[0042] [Fig.4] represents a diagram I of the tablet folding process in the mode of realization of the present utility model;

[0043] [Fig.5] represents a diagram II of the tablet folding process in the embodiment of the present utility model;

[0044] [Fig.6] represents a diagram of the tablet fully folded in the embodiment of the present utility model;

[0045] [Fig.7] represents a diagram of the chair frame folding process in the embodiment of the present utility model;

[0046] [Fig.8] represents a diagram of the chair frame fully folded in the embodiment of the present utility model;

[0047] [Fig.9] represents a diagram of an armrest support in the embodiment of the present utility model;

[0048] [Fig. 10] represents a partial diagram of the armrest support in the embodiment of the present utility model;

[0049] [Fig. 11] represents a partial cross-sectional view of the armrest support in the embodiment of the present utility model;

[0050] [Fig. 12] represents a diagram of a locking element in the embodiment of the present utility model;

[0051] [Fig. 13] represents a diagram of a folding chair in the embodiment of the present utility model. REFERENCES

[0052] 1. Main body

[0053] 11. Lower support

[0054] 111. Front support

[0055] 112. Rear support

[0056] 12. File support

[0057] 13. Leg support

[0058] 14. Seat frame

[0059] 15. Armrest support

[0060] 151. Armrest

[0061] 152. Sliding bar

[0062] 1521. Groove

[0063] 153. Sliding block

[0064] 154. Locking block

[0065] 155. Locking housing

[0066] 156. Elastic part

[0067] 157. Eccentric wheel

[0068] 158. Locking teeth

[0069] 2. Connecting element

[0070] 21. Connecting piece

[0071] 22. Rotating block

[0072] 221. Sliding hole

[0073] 23. Connecting rod

[0074] 24. Avoidance groove

[0075] 25. Limit sign

[0076] 3. Tablet

[0077] 31. Communication groove

[0078] 32. Storage hole

[0079] 33. Support groove

[0080] 4. Chair canvas DETAILED DESCRIPTION OF THE IMPLEMENTATION METHODS

[0081] The technical solutions of this utility model are clearly and completely described in conjunction with the figures. Obviously, the described embodiments represent only a part, rather than all, of the embodiments. Based on the embodiments of this utility model, all other embodiments derived by a person skilled in the art without creative work must fall within the scope of the protection afforded by this utility model.

[0082] In the description of this utility model, it should be noted that terms such as "central," "top," "bottom," "left," "right," "vertical," "horizontal," "inside," and "outside" are based on the orientation or position relationships illustrated in the figures and are intended solely to facilitate and simplify the description of this utility model, rather than to indicate or imply that the device or element in question must have a specific orientation, orientation structure, or operation, and therefore cannot be understood as limiting this utility model. Furthermore, the terms "first," "second," and "third" are used only for descriptive purposes; however, they are not intended to indicate or imply relative importance.

[0083] In the description of this utility model, it should be noted that, unless expressly indicated or limited, the terms "mounting," "connection," and "connection" are to be understood in a broad sense, for example, as a fixed connection, a removable connection, or a rigid connection; as a mechanical connection or an electrical connection; as a direct connection, an indirect connection using an intermediate part, or a communication between two elements. For a person skilled in the art, the specific meaning of the above terms in this utility model can be understood in particular cases.

[0084] As illustrated in [Fig. 1] to 12, one embodiment of the present utility model proposes a folding chair frame with a shelf, which includes a body main body 1 and a shelf 3; the main body 1 includes a lower support 11 and a main support frame, the lower support 11 is connected to the main support frame, and both are foldable, in order to reduce storage space; consequently, a connecting element 2 is connected to the lower support 11, and the shelf 3 is rotatably connected to the connecting element 2, so that the shelf 3 has a state of use and a folded state, and the two states can be switched by rotation; more specifically, in the state of use of the shelf 3, the shelf 3 is located outside the lower support 11, positioned horizontally while keeping the top oriented upwards, and serves to hold objects such as teacups, electronic devices;and in the folded state of the tablet 3, the main body 1 has two states, namely the used state or the folded state, in which, when the main body 1 and the tablet 3 are fully folded, the tablet 3 is located in the storage space delimited by the folded lower support 11, so as not to increase the thickness or width of the folded chair frame, which does not increase the bulk of the folded chair frame, nor the storage space, and allows for an increase in the quantity to be transported; moreover, the tablet 3 can be hidden inside the folded lower support 11, in order to avoid damaging the tablet 3 during transport and to guarantee the quality of the tablet 3; However, when the main body 1 is in use, the tablet 3 is located in the unfolded lower support 11, in order to avoid occupying the unfolded space and affecting people's activities.

[0085] More specifically, as shown in [Fig.2] to 3, the connecting element 2 comprises a variety of parts, as long as it can accommodate the rotation of the tablet 3 from the outside of the lower support 11 to the inside of the lower support 11, in which the folding and rotation of the tablet 3 are carried out in the unfolded state of the lower support 11. After the tablet 3 has been turned towards the inside of the lower support 11, the lower support 11 and the main support frame fold together, and after completing the folding, the tablet 3 is hidden in the folded chair frame.More specifically, in the embodiment, the connecting element 2 comprises a connecting piece 21, a rotating block 22 and a connecting rod 23, one end of the connecting piece 21 is mounted on the lower support 11, the other end is free, and the free end of the connecting piece 21 is located in the storage space surrounded by the folded lower support 11; indeed, with the exception of the end mounted on the lower support 11, the rest of the connecting piece 21 is located in the storage space delimited by the folded lower support 11, thus avoiding an increase in the folded thickness of the folding chair frame; consequently, the rotating block 22 is provided with a sliding hole 221, an axis of the sliding hole 221 is perpendicular to a lateral face of the lower support 11, one end of the rod. Link 23 slides and is rotatably arranged on the sliding hole 221, and the other end is connected to the tablet 3, so that the tablet 3 can slide and rotate along the axis of the sliding hole 221.Since the tablet 3 is horizontal when in use and is mounted on the lower support 11, in order to ensure smooth rotation of the tablet 3, the tablet 3 can slide along the sliding hole 221, so that the tablet 3 moves in a direction perpendicular to the side of the lower support 11 opposite the lower support 11, and the tablet 3 is no longer mounted on the lower support 11; Consequently, the end of the connecting rod 23 is provided with a limiting plate 25, and the limiting plate 25 is located outside the sliding hole 221, and an outside diameter of the limiting plate 25 is greater than a diameter of the sliding hole 221, in order to prevent, when the shelf 3 moves in the direction perpendicular to the side of the lower support 11 opposite the lower support 11, the end of the connecting rod 23 from detaching from the sliding hole 221.Then, the tablet 3 can rotate around the axis of the sliding hole 221 from a horizontal to a vertical direction, or in an inclined direction, as long as the rotation in this position allows the tablet 3 to tilt into the interior of the lower support 11; furthermore, the rotating block 22 is rotatably positioned at the free end of the connecting piece 21, so that the tablet 3 can rotate again with the rotating block 22 after the rotation, thus allowing the tablet 3 to rotate from the outside of the lower support 11 to its inside, in order to switch between the operating and folded states. The folding process of the tablet 3 is illustrated in [Fig. 4] to [Fig. 6].

[0086] More specifically, when the folding chair frame is folded, the presence of the connecting piece 21 can block the connecting rods 23, preventing them from coming together. Thus, the connecting piece 21 is provided with an avoidance groove 24, and the blocked connecting rods 23 can be placed in the avoidance groove 24, thereby reaching the original folded position. This prevents an increase in the folded thickness of the folding chair frame due to the connecting rod 23 being obstructed inside by the connecting piece 21. Furthermore, the end of the connecting rod 23 connecting to the shelf 3 is a U-shaped structure and is connected by bolts to make the support for the shelf 3 more stable.

[0087] In the embodiment, the axis of the rotating block 22 is provided vertically, so that the tablet 3 rotates towards the inner side of the lower support 11, even if the position of the tablet 3 deviates, and when the lower support 11 and the main support frame are folded, the tablet 3 will be forced to rotate in the storage space surrounded by the folded lower support 11, which will not increase the overall folded footprint.

[0088] More specifically, at least one communication groove 31 is provided on the top of the shelf 3, and several storage grooves 31 have different shapes; more specifically, the communication groove 31 can be cylindrical, rectangular, square, etc., which can be designed according to the needs of market users and intended to house teacups, electronic products, food, etc.; more specifically, the shelf 3 is provided with a storage hole 32, and the side wall of the shelf 3 is provided with a communication groove, the communication groove being connected to the storage hole 32.In the embodiment, the storage hole 32 comprises conical holes and column holes arranged from top to bottom, the communication groove is connected to both the conical holes and the column holes, and can be used to house a tall cup, and a tall cup support foot can enter and position itself in the storage hole 32 through the communication groove.

[0089] More specifically, as shown in [Fig. 1], the lower support 11 and the main support frame have various forms of foldable structures. In the embodiment, the lower support 11 comprises a front support 111 and a rear support 112, and a connecting rod assembly is connected between the central parts of the front support 111 and the rear support 112, in which the connecting rod assembly comprises a first rotating part, a second rotating element, and the second rotating element comprises two second rotating parts;and the main support frame comprises the backrest support 12, the leg support 13, the seat frame 14 and two armrest supports 15, wherein the front support 111, the rear support 112, the backrest support 12, the leg support 13 and the seat frame 14 are all U-shaped structures, and the specific connection relationship is as follows: the two upper ends of the front support 111 and those of the rear support 112 are rotationally connected to the two armrest supports 15, respectively; the backrest support 12 has two lower ends rotationally connected to two rear ends of the seat frame 14, respectively; the backrest support 12 has one free upper end, and the backrest support 12 has two lower parts rotationally connected to the rear ends of the armrest support 15, respectively;the leg support 13 has two upper ends rotatably connected to two front ends of the armrest support 15, respectively; the leg support 13 has a free lower end, and the leg support 13 has two upper parts rotatably connected to two front ends of the seat frame 14, respectively; one end of the two second rotatable parts is located on either side of the sliding bar in the rear support 112 and is rotatably connected by a pin, and the other end is connected as a whole by a connecting shaft and is connected from; The connecting rod is rotatably connected to the sliding bar in the seat frame 14 and to one end of the first rotating piece via the pin. The other end of the first rotating piece is rotatably connected to the sliding bar in the front support 111 via the pin, so that the connecting rod assembly is able to limit the deployment angle of the lower support 11 and support the seat frame 14, thus ensuring a more stable overall deployment of the main body 1 and improved support capacity. Preferably, the connecting rod has a mounting groove that cooperates with the sliding bar inside the rear support 112, and after unfolding, the sliding bar inside the rear support 112 is located within the mounting groove.

[0090] As shown in [Fig.1], in the unfolded state, the mounting groove on the connecting shaft between the second rotating parts is mounted jointly with the sliding bar inside the rear support 112, and when the entire chair frame is folded, as shown in [Fig.[7] to 8, the tablet 3 is first folded inwards into the lower support 11, then the lower parts of the front support 111 and the rear support 112 are brought close together, and the second rotating part rotates in a direction away from the rear support 112, and at the same time, the rear end of the seat frame 14 is driven to rotate in a direction close to the rear support 112, while rotating the free end of the backrest support 12 in a direction close to the upper end surface of the seat frame 14, and rotating the leg support 13 in a direction close to the lower end surface of the seat frame 14, to achieve the final folding of the entire chair frame.

[0091] More specifically, in the embodiment, based on the structure of the lower support 11, the mounting end of the connecting piece 21 is mounted in the central part of the rear support 112, and the end of the shelf 3 away from the rear support 112 is provided with a support groove 33 which cooperates with the front support 111, so that, after the shelf 3 is rotated horizontally, the support groove 33 is located above the front support 111, and a sliding bar inside the front support 111 is located in the support groove 33, in order to support the shelf 3. To fold the shelf 3, the shelf 3 is first turned upwards, then moved along the sliding hole 221 towards the outside, so as to separate the sliding bar inside the front support 111 from the support groove 33, then the shelf 3 can rotate towards the down.

[0092] More specifically, in the embodiment, as shown in [Figs. 9] to 12, the armrest support 15 comprises an armrest 151, a sliding bar 152 and a locking assembly; the front and rear ends of the armrest 151 are rotatably connected to a lower part of the backrest support 12 and at the upper end of the leg support 13, respectively, and the sliding bar 152 is provided inside the armrest 151 to support the armrest 151; the locking assembly comprises a sliding block 153 and a locking element, wherein the sliding block 153 is provided with a sliding hole (not shown), the sliding block 153 is sleeved onto the sliding bar 152 through the sliding hole, and the sliding block 153 can slide along the direction of the length of the sliding bar 152; the two upper ends of the front support 111 and the rear support 112 are both rotatably connected to the sliding block 153 to support the armrest support 15; and the locking element is used to lock the sliding bar 152;more specifically, when the locking element prevents the sliding block 153 from sliding against the sliding bar 152 relative to each other, thus preventing the sliding bar 152 from rotating, in this case, the backrest support 12 and the leg support 13 cannot be adjusted in terms of angle, and after unlocking the locking element, the sliding block 153 and the sliding bar 152 can slide relative to each other, the sliding bar 152 rotates, and the backrest support 12 and the leg support 13 can be adjusted in terms of angle and locked by the locking element once the angle is adjusted.

[0093] More specifically, in order to achieve the locking, in the embodiment, the locking element comprises a locking block 154, a locking housing 155 and an elastic element, the locking housing 155 is provided on the sliding block 153, the locking block 154 is provided on the locking housing 155, a locking part is provided at an upper end of the locking housing 155 and located above the sliding bar 152, and the elastic element is provided between an upper side wall of the locking housing 155 and an upper end part of the sliding block 153;through the locking block 154 being used in conjunction with the sliding block 153, the locking block 154 pushes against the lower side wall of the sliding block 153, causing the entire locking block 154 to move downwards and the locking part to move downwards, and finally to rest against the upper side wall of the sliding bar 152, and the elastic element presents a preload force, while the locking block 154 causes the sliding block 153 to move upwards, and under the action of the elastic element, the locking block 154 rests against the lower side wall of the sliding block 153, and the inner side wall of the sliding block 153 rests against the lower side wall of the sliding bar 152, and at the same time, the upper and lower side walls of the sliding bar 152 are locked, ensuring a better locking effect;Consequently, to release the lock, simply move the; locking block 154 in an opposite direction, thus, the locking block 154 no longer rests against the lower side wall of the sliding block 153, and the inner side wall of the sliding block 153 no longer rests against the lower side wall of the sliding bar 152, and, under the action of the elastic element, the locking part moves upwards and no longer comes into contact with the upper side wall of the sliding bar 152, thus restoring the initial state.

[0094] More specifically, in order to lock the sliding bar 152 by the locking element, in the embodiment, the locking housing 155 is sleeved onto the outer periphery of the sliding block 153, so that the locking block 154 is located directly below the sliding bar 152; consequently, a notch is opened at the upper end of the sliding block, 153, in communication with the sliding hole inside it, and in order to lock the sliding bar 152 by the locking element, the locking part can pass downwards through the notch in the sliding hole and engage with the upper wall of the sliding bar 152; one end of the locking block 154 is provided with an eccentric wheel 157 and is rotatably arranged on the locking housing 155,and the other end is free; a rotation axis of the locking block 154 is located below the lower side wall of the sliding block 153, and a distance between the rotation axis of the locking block 154 and the lower side wall of the sliding block 153 is less than a maximum radius of the eccentric wheel 157. During the rotation of the free end of the locking block 154 to drive the rotation of the eccentric wheel 157, the outer side wall of the eccentric wheel 157 first comes into contact with the lower side wall of the sliding block 153, and in the process of continuous rotation of the eccentric wheel 157, the sliding block 153 is forced to move upwards until the inner side wall of the sliding block 153 comes into contact with the lower side wall of the sliding bar 152, then the sliding block 153 stops moving, and at the same time,The locking housing 155 moves downwards, and the locking part moves downwards, until the outer side wall at the maximum radius of the eccentric wheel 157 comes into contact with the lower side wall of the sliding block 153. At this point, the locking housing 155 stops moving downwards; the locking part rests against the upper side wall of the sliding bar 152. Simultaneously, the elastic element between the upper end of the locking housing 155 and the upper side wall of the sliding block 153 experiences a preload. This preload on the elastic element causes the locking housing 155 to tend to move upwards, so that the eccentric wheel 157 continues to rest against the lower side wall of the sliding block 153, and the sliding block 153 can... continuously lean against the lower side wall of the sliding bar 152, thereby locking the upper and lower side walls of the sliding bar 152.

[0095] More specifically, the elastic element comprises two elastic pieces 156, one end of the two elastic pieces 156 is connected to the outer side wall of the upper end of the locking housing 155, and a lower end is in contact with the upper side wall of the sliding block 153; the elastic piece 156 has a certain degree of elasticity, and when the locking block 154 causes the locking housing 155 to move downwards, the upper end of the locking housing 155 moves downwards, and in this case, the lower end of the elastic piece 156 rests against the upper side wall of the sliding block 153.Since the angle between the elastic part 156 and the outer side wall of the upper end of the locking housing 155 is an acute angle, the elastic part 156 bends and generates an elastic force, and the elastic force is applied to the locking housing 155 for upward movement, causing the locking block 154 to press against the lower side wall of the sliding block 153. In the embodiment, the elastic part is a plastic part that has a certain degree of elasticity, and the two plastic parts and the locking housing 155 are single-piece structures and are all made of plastic.

[0096] More specifically, in the embodiment, the locking part includes locking teeth 158, the upper side wall of the sliding bar 152 is provided with a plurality of locking grooves 1521 corresponding to the locking teeth 158 in the length direction, the locking housing 155 moves downwards, the locking teeth 158 are jammed in the locking grooves 1521, and the locking teeth 158 bear against the inner wall of the locking grooves 1521 in order to form a locking structure, so that the sliding block 153 cannot slide relative to the sliding bar 152, the sliding bar 152 cannot move back and forth, and the backrest support 12 and the leg support 13 cannot be adjusted in terms of angle.The plurality of locking grooves 1521 are provided in the upper wall of the sliding bar 152 in order to form a rack-like structure, which is less expensive than installing another rack in the upper wall of the sliding bar 152.

[0097] In the embodiment, based on the structure of the locking assembly described above, when the entire chair frame is folded, the sliding block 153 can slide relative to the sliding bar 152 to a point close to the connection point between the armrest 151 and the leg support 13, such that the connection point between the upper end of the lower support 11 and the armrest support 15 is located at a connection point between the armrest 151 and the leg support 13. After folding, the upper end of the lower support 11 is positioned at the front end of the armrest 151 and the rear end of the lower support 11 is positioned at the rear end of the seat frame 14, further reducing the overall folded size.

[0098] As shown in [Fig. 13], the embodiment proposes a folding chair comprising a chair canvas 4 and a folding chair frame as described in any of the preceding embodiments, wherein the chair canvas 4 is mounted on a working surface formed by the upper end surfaces of the backrest support 12, the seat frame 14 and the leg support 13.

[0099] The above embodiments are merely preferred embodiments of this utility model and may not be used to limit the scope of protection of this utility model. All non-substantial modifications and replacements made by a person skilled in the art based on the utility model will fall within the scope of protection of this utility model.

Claims

Demands

1. Folding chair frame with a shelf (3), characterized in that it comprises a main body (1) and a shelf (3); in which the main body (1) comprises a lower support (11) and a main support frame, the lower support (11) is connected to the main support frame, and both are foldable; in which a connecting element (2) is connected to the lower support (11), and the shelf (3) is rotationally connected to the connecting element (2), such that the shelf (3) has a state of use and a folded state, and the two states can be switched by rotation; in which, in the state of use of the shelf (3), the shelf (3) is located on an outside side of the lower support (11) and serves to hold objects; in which, in the folded state of the shelf (3), the shelf (3) is located in a storage space surrounded by the folded lower support (11) or in the unfolded lower support (11).

2. Folding chair frame according to claim 1, characterized in that, the connecting element (2) comprises a connecting piece (21), a rotating block (22) and a connecting rod (23), one end of the connecting piece (21) is mounted on the lower support (11), the other end is free, and the free end is located in the storage space surrounded by the folded lower support (11); in which the rotating block (22) is provided with a sliding hole (221), an axis of the sliding hole (221) is perpendicular to a lateral face of the lower support (11), one end of the connecting rod (23) slides and is rotatably disposed on the sliding hole (221), and the other end is connected to the shelf (3), so that the shelf (3) can slide and rotate along the axis of the sliding hole (221);in which the rotating block (22) is rotatably arranged at the free end of the connecting piece (21) to rotate the tablet (3), in order to tilt the tablet (3) between the outer and inner sides of the lower support (11).

3. Folding chair frame according to claim 2, characterized in that at least one communication groove (31) is provided on the top of the shelf (3), a plurality of storage grooves (31) present different forms for storing objects of different shapes.

4. Folding chair frame according to claim 2, characterized in that the connecting piece (21) is provided with an avoidance groove (24) which cooperates with the connecting rod (23) inside the main body (1).

5. Folding chair frame according to claim 2, characterized in that the lower support (11) comprises a front support (111) and a rear support (112), the two upper ends of the front support (111) and those of the rear support (112) are both rotatably connected to the main support frame, and a connecting rod assembly is rotatably connected at a central part of the two; wherein the connecting piece (21) is mounted in the middle of the rear support (112), and one end of the shelf (3), away from the rear support (112), is provided with a support groove (33) which fits into the front support (111) to support the shelf (3) in use.

6. Folding chair frame according to claim 5, characterized in that the main support frame comprises a backrest support (12), a leg support (13), a seat frame (14) and two armrest supports (15); wherein the two upper ends of the front support (111) and those of the rear support (112) are rotatably connected to the two armrest supports (15), respectively; wherein the backrest support (12) has two lower ends rotatably connected to two rear ends of the seat frame (14), respectively, a free upper end, and two lower parts rotatably connected to the rear ends of the armrest support (15), respectively;in which the leg support (13) has two upper ends rotatably connected to two front ends of the armrest support (15), respectively, a free lower end, and two upper parts rotatably connected to two front ends of the seat frame (14), respectively; and the connecting rod assembly is rotatably connected to the seat frame (14).

7. Folding chair frame according to claim 6, characterized in that the armrest support (15) comprises an armrest (151), a sliding bar (152) and a locking assembly; wherein the front and rear ends of the armrest (151) are rotatably connected to a lower part of the backrest support (12) and to the upper end of the leg support (13), respectively, and the sliding bar (152) is provided inside the armrest (151) to support the armrest (151); wherein the locking assembly is provided to slide on the sliding bar (152) to cooperate with the sliding bar (152), in order to lock the sliding bar (152); wherein the two upper ends of the front support (111) and those of the rear support (112) are rotatably connected to the locking assembly to support the sliding bar (152).

8. Folding chair frame according to claim 7, characterized in that the locking assembly comprises: a sliding block (153) which is provided to slide on the sliding bar (152); a locking element which is provided on the sliding block (153); wherein the locking element comprises a locking block (154), a locking housing (155) and an elastic element, the locking housing (155) is provided on the sliding block (153), the locking block (154) is provided on the locking housing (155), a locking portion is provided at an upper end of the locking housing (155) and located above the sliding bar (152), and the elastic element is provided between an upper side wall of the locking housing (155) and an upper end portion of the sliding block (153);in which the locking block (154) is used in conjunction with a lower side wall of the sliding block (153) in order to cause the locking part to move downwards and to bear against an upper side wall of the sliding bar (152), and to cause the sliding block (153) to move upwards and to bear against the lower side wall of the sliding bar (152) under the action of the elastic element.

9. Folding chair frame according to claim 8, characterized in that one end of the locking block (154) is provided with a

10. eccentric wheel (157) and is rotatably arranged on the locking housing (155), and the other end is free; in which the locking housing (155) is rotatably sleeved onto an outer periphery of the sliding block (153), and a notch is opened at the upper end of the sliding block (153), in communication with the sliding hole (221) inside it, and the locking part moves downwards to engage with the upper side wall of the sliding block (153) through the notch; in which a rotation axis of the locking block (154) is located below the lower side wall of the sliding block (153), and a distance between the rotation axis of the locking block (154) and the lower side wall of the sliding block (153) is less than a maximum radius of the eccentric wheel (157). Folding chair, characterized in that it comprises a chair canvas (4) and a folding chair frame according to any one of claims 1 to 9, in which the main support frame comprises a backrest support (12), a leg support (13), a seat frame (14) and two armrest supports (15); the chair canvas (4) is mounted on a working surface formed by the upper end surfaces of the backrest support (12), the seat frame (14) and the leg support (13).

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