Table and chair dual-purpose chair

Abstract

The invention provides a table and chair dual-purpose chair. The table and chair dual-purpose chair comprises a back plate and a back support, the back plate is rotationally connected to the back support; the back plate is provided with a first locking hole and a second locking hole in the rotating direction of the back plate, the back support is provided with a locking assembly, the back plate is rotated to enable the locking assembly to enter the first locking hole or the second locking hole so that the back plate can be switched to be in a first state or a second state, the first state is an inclined or vertical state, and the second state is a horizontal state. Through the arrangement of the first locking hole, the second locking hole and the locking assembly, a user only needs to rotate the back plate and insert the locking assembly into the first locking hole or the second locking hole, the back plate can be kept in the first state or the second state, and the back plate can be used as a backrest for leaning in the first state; in the second state, the back plate can be used as a table plate for reading, writing, working and other activities, so that the chair is a dual-purpose chair with sitting and leaning functions and a tabletop function, and the requirements of users and markets on functional diversification and high cost performance of furniture are met.

Description

Technical Field

[0001] The present invention relates to the technical field of chairs, and more particularly to a chair that can be used as a table or chair. Background Art

[0002] Chairs are essential furniture in everyday life and work settings. Traditional chairs typically serve only a single function, satisfying the need for seating and failing to fulfill other uses. Users who want to read, write, or temporarily place items on a table must purchase a separate desk, increasing costs. Therefore, traditional chairs designed for seating are unable to meet the current demand for diverse and cost-effective furniture. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a chair that can be used as a table and chair to solve the technical problems that traditional chairs have few uses and low cost performance.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a chair that can be used as a table or chair, which includes: a back panel and a back support; the back panel is rotatably connected to the back support; the back panel is provided with a first locking hole and a second locking hole along the rotation direction of the back panel, and the back support is provided with a locking assembly, and the back panel is rotated so that the locking assembly enters the first locking hole or the second locking hole to switch the back panel to a first state or a second state, the first state is an inclined or vertical state, and the second state is a horizontal state.

[0006] Wherein, the angle between the first locking hole, the second locking hole and the line connecting the back plate rotation axis is less than or equal to 90°.

[0007] In which, the back support is provided with a receiving groove and a through-hole, the through-hole is arranged at one end of the back support close to the back plate, the receiving groove is connected to the through-hole, the locking assembly is installed in the receiving groove, and extends from the receiving groove through the through-hole to the first locking hole or the second locking hole.

[0008] Wherein, the locking assembly includes: a locking pin and an elastic member; the elastic member is arranged in the receiving groove and abuts the locking pin; the locking pin is passed through the through hole, one end of the locking pin is arranged in the receiving groove, and the other end abuts the back plate.

[0009] Wherein, the elastic member is a torsion spring, which is provided with a spirally wound portion, a short arm and a long arm. The spirally wound portion is located on the side of the locking pin away from the back plate and is rotatably connected to the back support. The long arm and the short arm are formed by extending outward from the spirally wound portion, and the long arm is connected to the end of the locking pin away from the back plate.

[0010] Wherein, the locking assembly includes: an adjustment block; the adjustment block is slidably connected to the accommodating groove, and the short arm is connected to the adjustment block; sliding the adjustment block makes the long arm away from one end of the spiral winding part close to or away from the through hole.

[0011] Wherein, the locking assembly further includes: a reset compression spring; the reset compression spring is arranged along the sliding direction of the adjustment block, and two ends of the reset compression spring respectively abut against the inner wall of the accommodating groove and the adjustment block.

[0012] In which, the locking assembly also includes: a toggle switch; a sliding groove is opened on a side wall of the back support away from the back plate, the sliding groove is connected to the receiving groove, and the adjustment block is slidably connected to the sliding groove; the toggle switch is arranged on a side of the sliding groove away from the receiving groove, and the toggle switch is connected to the adjustment block.

[0013] In which, the back panel is provided with a hinge seat, the hinge seat is provided with two hinge ears, and the hinge ears are hinged to the back support; the number of the first locking hole, the second locking hole, the through hole, the locking pin and the elastic member are all two, the two first locking holes are respectively mirrored on the two hinge ears, the two second locking holes are respectively mirrored on the two hinge ears, the two through holes are respectively mirrored on the two side walls of the back support, the two locking pins are respectively passed through the two through holes, and the two elastic members are respectively connected to the two locking pins.

[0014] Wherein, the back support is provided with a stop groove along the rotation direction of the back plate, and the hinge seat is provided with a stop block, and the stop block is slidably connected to the stop groove.

[0015] The beneficial effects of the present invention compared with the prior art are: by arranging a first locking hole and a second locking hole on the back panel and arranging a locking assembly on the back support, the user only needs to rotate the back panel and insert the locking assembly into the first locking hole or the second locking hole to keep the back panel in the first state or the second state. In the first state, the back panel is tilted or vertical and can be used as a backrest for leaning. In the second state, the back panel is horizontal and can be used as a table for reading, writing, office work, placing items, etc., making the chair a dual-purpose chair with both sitting and desktop functions, meeting the user and market needs for diversified furniture functions and high cost performance.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In addition, in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of a dual-purpose desk and chair provided by the present invention;

[0018] Figure 2 A schematic diagram of the structure of a dual-purpose table and chair provided by the present invention, wherein the back panel is switched to a second state;

[0019] Figure 3 A schematic diagram of the exploded structure of the hinged seat and back support of a dual-purpose table and chair provided by the present invention;

[0020] Figure 4 A schematic structural diagram of a back support and locking assembly of a dual-purpose desk and chair provided by the present invention;

[0021] Figure 5 A schematic structural diagram of a hinged seat and a back support of a dual-purpose table and chair provided by the present invention, with the back panel locked in a first state;

[0022] Figure 6 A schematic structural diagram of a hinged seat and a back support of a dual-purpose table and chair provided by the present invention in an unlocked state;

[0023] Figure 7 A schematic structural diagram of a hinged seat and a back support of a dual-purpose table and chair provided by the present invention, with the back panel unlocked and rotated;

[0024] Figure 8 A schematic structural diagram of a hinged seat and a back support of a dual-purpose table and chair provided by the present invention, with the back panel of the chair locked in a second state.

[0025] Reference numerals:

[0026] 1. Back plate; 11. First locking hole; 12. Second locking hole; 13. Articulated seat; 131. Articulated ear; 1311. Second axis hole; 1312. Mounting slot; 13121. First screw hole; 132. Locking block; 1321. Screw connection; 13211. Second screw hole; 133. Second screw; 134. Stop block; 2. Back support; 21. Locking assembly; 211. Locking pin; 2111. Plug hole; 212. Elastic member; 2121. Spiral winding part; 2122, short arm; 2123, long arm; 2124, plug-in part; 2125, limiting part; 213, first screw; 214, adjusting block; 2141, limiting groove; 215, reset spring; 216, toggle switch; 22, accommodating groove; 23, through hole; 24, sliding groove; 25, cover plate; 26, first axial hole; 27, stop groove; 271, first limiting surface; 272, second limiting surface; 3, rotating rod; 4, seat plate. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification and appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0030] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0031] See also Figures 1 to 8 As shown, this embodiment discloses a chair that can be used as a table and a chair, comprising: a back panel 1 and a back support 2; the back panel 1 is rotatably connected to the back support 2; the back panel 1 is provided with a first locking hole 11 and a second locking hole 12 along the rotation direction of the back panel 1, and the back support 2 is provided with a locking assembly 21. The back panel 1 is rotated so that the locking assembly 21 enters the first locking hole 11 or the second locking hole 12, so that the back panel 1 is switched to a first state or a second state, the first state is an inclined or vertical state, and the second state is a horizontal state.

[0032] When implementing it, refer to Figure 1 , the backboard 1 maintains the first state, so that the backboard 1 has a backrest function, at this time, the user can sit on the seat 4 of the chair and lean on the backrest; Figure 2 , the backboard 1 maintains the second state, so that the backboard 1 has the function of a table. At this time, the user can face the backboard 1 and sit astride the seat 4, and then sit on the seat 4 and use the table to carry out activities such as reading, writing, office work and placing items.

[0033] The dual-purpose chair of the present embodiment is provided with a first locking hole 11 and a second locking hole 12 on the back panel 1, and a locking assembly 21 is provided on the back support 2, so that the user only needs to rotate the back panel 1 and insert the locking assembly 21 into the first locking hole 11 or the second locking hole 12 to keep the back panel 1 in the first state or the second state. In the first state, the back panel 1 is tilted or vertical and can be used as a backrest for leaning. In the second state, the back panel 1 is horizontal and can be used as a table for reading, writing, office work, placing items, etc., making the chair a dual-purpose chair with both sitting and desktop functions, meeting the needs of users and the market for diversified furniture functions and high cost performance.

[0034] Specifically, the angle between the first locking hole 11 and the second locking hole 12 and the rotation axis of the back panel 1 is less than or equal to 90°. It is understood that, on the plane containing the first locking hole 11 and the second locking hole 12, with the rotation axis of the back panel 1 as the center and the distance from the first locking hole 11 to the center as the radius, the first locking hole 11 and the second locking hole 12 are at the same distance from the center, the angle formed by the line connecting the first locking hole 11 and the second locking hole 12 to the center of the circle is less than or equal to 90°, and the arc between the first locking hole 11 and the second locking hole 12 is less than or equal to one-quarter of the circumference. In this embodiment, the first locking hole 11 is positioned lower than the second locking hole 12, and the line connecting the second locking hole 12 to the center of the circle is horizontal. The angle between the first locking hole 11 and the second locking hole 12 and the center of the circle is less than or equal to 90°, so that when the back panel 1 switches between the first locking hole 11 and the second locking hole 12, the back panel 1 transitions from a tilted or vertical position to a horizontal position.

[0035] Specifically, the back support 2 is provided with a receiving slot 22 and a through-hole 23. The through-hole 23 is provided at one end of the back support 2 near the back plate 1. The receiving slot 22 communicates with the through-hole 23. The locking assembly 21 is mounted in the receiving slot 22 and extends from the receiving slot 22 through the through-hole 23 to the first locking hole 11 or the second locking hole 12. More specifically, on the plane where the through-hole 23 is located, with the rotation axis of the back plate 1 as the center, the distance between the through-hole 23 and this center is the same as the distance between the first locking hole 11 and the center. When the back panel 1 needs to be switched, the back panel 1 is rotated so that the first locking hole 11 or the second locking hole 12 is aligned with the through hole 23 on the back support 2. Since the distance between the through hole 23 and the first locking hole 11 and the back panel rotation axis is consistent, the locking assembly 21 can be guided by the through hole 23 and smoothly enter the corresponding first locking hole 11 or second locking hole 12 to complete the locking. When the lock is released, the locking assembly 21 retracts from the first locking hole 11 or the second locking hole 12 along the through hole 23 toward the receiving groove 22, so that the locking assembly 21 is separated from the first locking hole 11 and the second locking hole 12. At this time, the back panel 1 can rotate freely. The receiving groove 22 provides a stable installation and movement space for the locking assembly 21, ensuring its stable operation. It also prevents the locking assembly 21 from being exposed outside the back support 2, preventing the structure of the locking assembly 21 from being damaged by external forces or collisions with foreign objects, and preventing the structure of the locking assembly 21 from falling, thereby ensuring the smooth locking and unlocking operations.

[0036] Specifically, the locking assembly 21 includes a locking pin 211 and an elastic member 212. The elastic member 212 is disposed within the receiving slot 22 and abuts the locking pin 211. The locking pin 211 is inserted into the through-hole 23, with one end of the locking pin 211 disposed within the receiving slot 22 and the other end abutting the back plate 1. It is understood that, under the elastic force of the elastic member 212, the locking pin 211 is constantly pushed toward the back plate 1, causing the end of the locking pin 211 proximate to the back plate 1 to abut against the back plate 1. When the locking pin 211 is aligned with the first locking hole 11 or the second locking hole 12, the elastic member 212 pushes the locking pin 211 so that the locking pin 211 engages with the first locking hole 11 or the second locking hole 12, achieving stable locking. To release the lock, an external force must be applied to overcome the elastic force of the elastic member 212 and pull the locking pin 211 out of the locking hole. The elastic member 212 and the locking pin 211 perform a locking function, so that the back panel 1 can remain stable in both the first state and the second state, thereby preventing the back panel 1 from accidentally rotating during use of the chair and improving the user experience.

[0037] Specifically, the elastic member 212 is a torsion spring comprising a helical winding portion 2121, a short arm 2122, and a long arm 2123. The helical winding portion 2121 is located on the side of the locking pin 211 away from the back plate 1 and is rotatably connected to the back support 2. The long arm 2123 and the short arm 2122 extend outward from the helical winding portion 2121. The long arm 2123 is connected to the end of the locking pin 211 away from the back plate 1. In this embodiment, a first screw 213 is inserted into the helical winding portion 2121. The end of the first screw 213 away from the nut is connected to the back support 2. The helical winding portion 2121 is located between the back support 2 and the nut end of the first screw 213. When the short arm 2122 moves, the helically wound portion 2121 of the torsion spring rotates around the first screw 213, causing the torsion spring to deform. The movement of the short arm 2122 drives the long arm 2123 to move accordingly. The long arm 2123 connects to the locking pin 211, thereby pushing or pulling the locking pin 211 to move axially along the through-hole 23, thereby moving the locking pin 211 toward or away from the back plate 1. In practice, moving the short arm 2122 in the direction of compression or extension of the torsion spring causes the long arm 2123 to move toward or away from the through-hole 23, thereby driving the locking pin 211 to abut against or away from the back plate 1, thereby facilitating the insertion or removal of the locking pin 211 from the first locking hole 11 or the second locking hole 12. When the locking pin 211 is inserted into the first locking hole 11 or the second locking hole 12, the back panel 1 is locked in the first state or the second state; when the locking pin 211 leaves the first locking hole 11 and the second locking hole 12, the back panel 1 and the back support 2 are unlocked. At this time, by rotating the back panel 1, the back panel 1 can be adjusted to the target state to achieve switching of the functional state of the back panel 1.

[0038] Preferably, the angle between the long arm 2123 and the short arm 2122 is less than 90 degrees, the long arm 2123 extends from the spiral winding portion 2121 to the top of the back support 2, and the short arm 2122 extends from the spiral winding portion 2121 to the axis of the back support 2. Figure 5 and Figure 8 Since the angle between the long arm 2123 and the short arm 2122 is less than 90 degrees, when the short arm 2122 moves toward the top of the back support 2, i.e., moves upward, under the action of the lever principle, the long arm 2123 can move outward with a greater amplitude toward the through hole 23, thereby more effectively driving the locking pin 211 toward the back plate 1; Figure 6 and Figure 7 When the short arm 2122 moves in the opposite direction, i.e., moves downward, the long arm 2123 can quickly retract toward the axis of the back support 2, thereby quickly driving the locking pin 211 away from the first locking hole 11 or the second locking hole 12, thereby enhancing the efficiency of force transmission. Therefore, the design of the angle between the long arm 2123 and the short arm 2122 is less than 90 degrees, so that a small displacement of the short arm 2122 can be converted into a large displacement of the long arm 2123, reducing the stroke required to operate the short arm 2122 and making it easier for the user to switch the locking state.

[0039] Preferably, an inserting portion 2124 is provided at one end of the long arm 2123 away from the spirally wound portion 2121. Inserting portion 2124 is formed by bending the long arm 2123. An inserting hole 2111 is provided at the end of the locking pin 211 away from the back plate 1. Inserting portion 2124 is inserted into inserting hole 2111. The insertion method of inserting portion 2124 and inserting hole 2111 is simple and reliable, facilitating assembly and disassembly of the long arm 2123 and the locking pin 211. It also ensures stable power transmission between the long arm 2123 and the locking pin 211, preventing the locking pin 211 from losing its actuation due to a loose connection, thereby improving the overall stability and service life of the locking assembly 21.

[0040] Specifically, the locking assembly 21 includes an adjustment block 214 slidably connected to the receiving slot 22, with the short arm 2122 connected to the adjustment block 214. Sliding the adjustment block 214 allows the long arm 2123, one end away from the spirally wound portion 2121, to move closer to or further from the through-hole 23. The adjustment block 214 provides a convenient operating component for the user, indirectly controlling the movement of the locking pin 211 by sliding the adjustment block 214, thus reducing user operational difficulty. During implementation, sliding the adjustment block 214 causes the short arm 2122 connected thereto to move, which in turn compresses or stretches the torsion spring, thereby causing the long arm 2123 to move accordingly.

[0041] Preferably, a stopper 2125 is provided at one end of the short arm 2122, distal from the helically wound portion 2121. Stopper 2125 is formed by bending the short arm 2122. The adjustment block 214 is provided with a stopper slot 2141, through which stopper 2125 is inserted and slidably connected. The cooperation between stopper 2125 and stopper slot 2141 limits the relative position between the short arm 2122 and the adjustment block 214, preventing them from disengaging and ensuring the continuity of power transmission. At the same time, stopper slot 2141 allows a certain amount of relative movement of stopper 2125, preventing component damage due to a rigid connection and enhancing the structural flexibility and safety of the locking assembly 21.

[0042] Specifically, the locking assembly 21 further includes a return spring 215, which is arranged along the sliding direction of the adjustment block 214. The two ends of the return spring 215 abut against the inner wall of the receiving groove 22 and the adjustment block 214, respectively. The downward movement of the adjustment block 214 causes the locking pin 211 to separate from the first locking hole 11 and the second locking hole 12, thereby unlocking the back panel 1 and the back support 2. After unlocking is completed and the back panel 1 is rotated to the target position, the return spring 215 automatically resets the adjustment block 214, eliminating the need for manual resetting by the user and improving operational convenience. Furthermore, the continuous elastic force of the return spring 215 maintains the adjustment block 214 in its initial position, preventing malfunction of the locking assembly 211 due to accidental contact. In specific implementation, when the sliding adjustment block 214 causes the locking pin 211 to disengage from the first locking hole 11 and the second locking hole 12, the return compression spring 215 is compressed and stores elastic potential energy; after loosening the adjustment block 214, the return compression spring 215 releases the elastic potential energy, pushing the adjustment block 214 to slide toward the top of the back support 2, so that the short arm 2122, the long arm 2123 and the locking pin 211 return to their initial positions, preparing for the next locking.

[0043] Specifically, the locking assembly 21 further includes a toggle switch 216; a sliding slot 24 is defined on a side wall of the back support 2 away from the back panel 1, the sliding slot 24 being connected to the receiving slot 22, and an adjustment block 214 being slidably connected to the sliding slot 24; and a toggle switch 216 is disposed on a side of the sliding slot 24 away from the receiving slot 22, and is connected to the adjustment block 214. By toggling the toggle switch 216 outside the sliding slot 24, the user causes the connected adjustment block 214 to slide within the sliding slot 24, allowing the user to toggle the toggle switch 216 downward to unlock the back panel 1.

[0044] Specifically, the dual-purpose chair of this embodiment further includes a cover plate 25 detachably connected to a notch on the side of the receiving slot 22 away from the sliding slot 24. Preferably, the cover plate 25 is connected to the notch of the receiving slot 22 via a snap fastener. The cover plate 25 covers the notch of the receiving slot 22, sealing and protecting the locking assembly 21 within the receiving slot 22, protecting the locking assembly 21 from dust and debris, and extending its service life. When the locking assembly 21 needs to be repaired or replaced, the cover plate 25 can be removed to expose the locking assembly 21. This is a simple and quick operation that does not affect the overall structural stability of the chair.

[0045] Specifically, the back panel 1 is provided with a hinge seat 13, the hinge seat 13 is provided with two hinge ears 131, and the hinge ears 131 are hinged to the back support 2; the number of the first locking hole 11, the second locking hole 12, the through-hole 23, the locking pin 211 and the elastic member 212 are all two, the two first locking holes 11 are respectively mirrored on the two hinge ears 131, the two second locking holes 12 are respectively mirrored on the two hinge ears 131, the two through-holes 23 are respectively mirrored on the two side walls of the back support 2, the two locking pins 211 are respectively passed through the two through-holes 23, and the two elastic members 212 are respectively connected to the two locking pins 211. The back panel 1 is hinged to the back support 2 through the two hinge ears 131 of the hinge seat 13. When the back panel 1 is rotated, the two hinge ears 131 rotate synchronously around the rotation axis; the bilaterally symmetrical locking structure formed by the two first locking holes 11, the two second locking holes 12, the two through-holes 23, the two locking pins 211 and the two elastic members 212 allows the back panel 1 to be subjected to balanced forces on both sides when locked and rotated, avoiding tilting or damage caused by unilateral force, thereby improving the stability and safety of the chair; at the same time, the mirror setting ensures that the actions on both sides of the back panel 1 are synchronized when switching states, making the operation smoother.

[0046] Specifically, two first axial holes 26 are provided on each side wall of the back support 2, and a second axial hole 1311 corresponding to the first axial hole 26 is provided on the hinged ear 131. A rotating rod 3 is inserted between the first axial hole 26 and the second axial hole 1311. Specifically, the first locking hole 11 and the second locking hole 12 are distributed in an uneven circular pattern around the center of the second axial hole 1311, and the angle between the first locking hole 11, the second locking hole 12, and the center of the second axial hole 1311 is less than or equal to 90°. The rotating rod 3 passes through the first axial hole 26 and the second axial hole 1311, forming a hinged connection between the hinged ear 131 and the back support 2, allowing the back panel 1 to rotate around the rotating rod 3. Because the first locking hole 11 and the second locking hole 12 are distributed around the center of the second axial hole 1311, when the back panel 1 is rotated, the first locking hole 11 and the second locking hole 12 can move in a circular pattern around the rotating rod 3, precisely matching the position of the locking pin 211 on the back support 2. The distribution and angle design of the first locking hole 11 and the second locking hole 12 ensure that the angle of the back panel 1 is reasonable when switching between the first state and the second state, meeting the functional requirements of the backrest and the table top, while making the structure more compact.

[0047] Preferably, a mounting slot 1312 is provided on a side of the hinged ear 131 near the back support 2, and a locking block 132 is disposed within the mounting slot 1312. The first locking hole 11, the second locking hole 12, and the second axial hole 1311 are disposed on a side wall of the locking block 132 near the back support 2. More specifically, a first screw hole 13121 is defined at the edge of the notch of the mounting slot 1312. The locking block 132 is provided with a protruding screw connection portion 1321. The screw connection portion 1321 is provided with a second screw hole 13211 corresponding to the first screw hole 13121. The first screw hole 13121 and the second screw hole 13211 are screwed together by a second screw 133. The locking block 132 is secured within the mounting slot 1312 by the second screw 133 and rotates along with the hinged ear 131 about the rotating rod 3, ensuring that the locking block 132 does not loosen or shift during movement. The detachable connection between the locking block 132 and the mounting slot 1312 facilitates replacement and maintenance of the locking block 132 and the rotating rod 3, reducing maintenance costs while ensuring the secure connection between the locking block 132 and the hinged ear 131. Furthermore, the distribution and distance between the first locking hole 11 and the second locking hole 12 can be adjusted according to actual needs, thereby improving the applicability and flexibility of the chair. By replacing the locking block 132 with different positions of the first locking hole 11 and the second locking hole 12, the inclination angle of the back panel 1 in the first state or the horizontal height in the second state can be adjusted, allowing the chair to better adapt to the needs of various users. This modular design also facilitates manufacturing. For example, in mass production, locking blocks 132 of various specifications can be pre-fabricated and then assembled according to different product models or order requirements without the need to redesign and process the entire connecting ear, greatly shortening the product R&D cycle and production costs. When product functionality upgrades or improvements are required, only the locking block 132 needs to be replaced, without having to modify other components such as the connecting ear, thereby improving product iteration efficiency and enhancing market competitiveness.

[0048] Specifically, the back support 2 is provided with a stop groove 27 along the rotational direction of the back panel 1, and a stop block 134 is provided on the hinge seat 13. The stop block 134 is slidably connected to the stop groove 27. More specifically, the stop groove 27 is provided with a first limiting surface 271 and a second limiting surface 272 along the rotational direction of the back panel 1, with the first limiting surface 271 being lower than the second limiting surface 272. It will be understood that when the back panel 1 rotates, the stop block 134 on the hinge seat 13 slides within the stop groove 27 of the back support 2. When the stop block 134 abuts the first limiting surface 271, the locking pin 211 faces the first locking hole 11, locking the back panel 1 in the first position for a user to sit on. When the stop block 134 abuts the second limiting surface 272, the locking pin 211 faces the second locking hole 12, locking the back panel 1 in the second position for the user to use the tabletop. The cooperation between the stop groove 27 and the stop block 134 plays a role in precise positioning, ensuring that the locking pin 211 can be accurately aligned with the first locking hole 11 or the second locking hole 12, thereby improving the accuracy and efficiency of locking; at the same time, it prevents the back panel 1 from rotating too much and causing structural damage, thereby protecting the stability of the chair structure and extending the service life of the chair.

[0049] It is understood that the dual-purpose chair of this embodiment further includes: a seat plate 4; and the back support 2 is fixedly connected to the seat plate 4 at one end away from the back plate 1. By fixing the back support 2 to the seat plate 4, a stable connection is achieved between the back plate 1, the back support 2, and the seat plate 4. This allows the chair to maintain its conventional seat function while maintaining the back plate 1 in a horizontal state through the connection between the back plate 1 and the locking assembly 21, thereby achieving the function of a table plate. This not only ensures the structural stability between the back support 2 and the seat plate 4, capable of withstanding the load when the user leans on or uses the table plate, but also provides a solid support foundation for the articulation of the back plate 1, ensuring a smooth and reliable state switching process of the back plate 1. At the same time, the overall structure is compact and reasonable, and the dual-purpose function of the chair as a table and chair can be achieved without the need for additional supporting components, power supply, and drive components, thus taking into account the chair's versatility, practicality, and space utilization.

[0050] The present embodiment provides a chair that can be used as both a table and a chair. By providing a first locking hole and a second locking hole on the back panel and providing a locking assembly on the back support, the user only needs to rotate the back panel and insert the locking assembly into the first locking hole or the second locking hole to keep the back panel in the first state or the second state. In the first state, the back panel is tilted or vertical and can be used as a backrest for leaning. In the second state, the back panel is horizontal and can be used as a table for reading, writing, office work, placing items, etc., making the chair a dual-purpose chair with both sitting and desktop functions, meeting the needs of users and the market for diversified furniture functions and high cost performance.

[0051] The above examples are merely provided to further illustrate the technical content of the present invention for easier understanding by the reader, but do not limit the embodiments of the present invention to these examples. Any extension or re-creation of the technology based on the present invention is protected by the present invention. The scope of protection of the present invention shall be determined by the claims.

Claims

1. A chair that can be used as a table and chair, characterized in that: include: Back plate and back support; The back plate is rotatably connected to the back support; The back panel is provided with a first locking hole and a second locking hole along the rotation direction of the back panel, and the back support is provided with a locking assembly. The back panel is rotated so that the locking assembly enters the first locking hole or the second locking hole to switch the back panel to a first state or a second state, the first state is an inclined or vertical state, and the second state is a horizontal state.

2. The dual-purpose chair according to claim 1, characterized in that: An included angle between the first locking hole, the second locking hole and a line connecting the back plate rotation axis is less than or equal to 90°.

3. The dual-purpose chair according to claim 1, characterized in that: The back support is provided with a receiving groove and a through hole, the through hole is provided at one end of the back support close to the back plate, the receiving groove is communicated with the through hole, the locking assembly is installed in the receiving groove, and extends from the receiving groove through the through hole to the first locking hole or the second locking hole.

4. The dual-purpose chair according to claim 3, characterized in that: The locking assembly includes: a locking pin and an elastic member; the elastic member is arranged in the receiving groove and abuts the locking pin; the locking pin is passed through the through hole, one end of the locking pin is arranged in the receiving groove, and the other end abuts the back plate.

5. The dual-purpose chair according to claim 4, characterized in that: The elastic member is a torsion spring, which is provided with a spirally wound portion, a short arm and a long arm. The spirally wound portion is located on the side of the locking pin away from the back plate and is rotatably connected to the back support. The long arm and the short arm are formed by extending outward from the spirally wound portion, and the long arm is connected to the end of the locking pin away from the back plate.

6. The dual-purpose chair according to claim 5, characterized in that: The locking assembly includes: an adjusting block; the adjusting block is slidably connected to the accommodating groove, and the short arm is connected to the adjusting block; the adjusting block is slid to make the end of the long arm away from the spiral winding part close to or away from the through hole.

7. The dual-purpose chair according to claim 6, characterized in that: The locking assembly further includes a return compression spring, which is arranged along the sliding direction of the adjustment block, and two ends of the return compression spring respectively abut against the inner wall of the accommodating groove and the adjustment block.

8. The dual-purpose chair according to claim 6, characterized in that: The locking assembly also includes: a toggle switch; a sliding groove is provided on a side wall of the back support away from the back plate, the sliding groove is connected to the accommodating groove, and the adjustment block is slidably connected to the sliding groove; the toggle switch is provided on a side of the sliding groove away from the accommodating groove, and the toggle switch is connected to the adjustment block.

9. The dual-purpose chair according to any one of claims 4 to 8, characterized in that: The back panel is provided with a hinge seat, and the hinge seat is provided with two hinge ears, and the hinge ears are hinged to the back support; the number of the first locking hole, the second locking hole, the through hole, the locking pin and the elastic member are all two, the two first locking holes are respectively mirrored on the two hinge ears, the two second locking holes are respectively mirrored on the two hinge ears, the two through holes are respectively mirrored on the two side walls of the back support, the two locking pins are respectively passed through the two through holes, and the two elastic members are respectively connected to the two locking pins.

10. The dual-purpose chair according to claim 9, characterized in that: The back support is provided with a stop groove along the rotation direction of the back plate, and the hinge seat is provided with a stop block, and the stop block is slidably connected to the stop groove.

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