Noon break chair

Abstract

The utility model relates to the technical field of furniture, in particular to a noon break chair, which comprises a frame provided with a cross bar. The seat plate is movably connected with the frame, a limiting plate is arranged at the bottom of the seat plate, and the cross rod is located below the seat plate; the locking mechanism is rotatably fixed on the cross rod; the locking mechanism comprises an abutting plate; the abutting plate abuts against the limiting plate. The end, abutting against the limiting plate, of the abutting plate is in an arc shape. The end, abutting against the limiting plate, of the abutting plate is arranged to be in the arc shape so as to meet the movement track of the abutting plate relative to the limiting plate, the abutting plate can make contact with and be separated from the limiting plate more smoothly, too large force does not need to be applied in the unlocking process, and the clamping stagnation phenomenon is avoided; and when the chair needs to be recovered from the deck chair form to the seat form, the smooth transition of the arc-shaped end part can promote the propping plate to easily return to the original position.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a nap chair. Background Technology

[0002] Primary and secondary school students typically nap in classrooms during lunch breaks, using benches as chairs. These chairs usually include a locking mechanism to lock the chair in place and control its repositioning. During use, the locking mechanism engages with limiting members on the seat or backrest to lock the chair in place. Currently, the locking mechanisms of commonly used primary and secondary school nap chairs have problems with being difficult to unlock and return to their original position. The shape of the parts that the locking mechanism abuts against the limiting members does not conform to the movement trajectory, requiring significant force to unlock, easily causing jamming, and hindering the return of the abutting parts to their original position when restoring the chair's original shape, affecting the smoothness of unlocking and returning to the original position.

[0003] Therefore, existing technologies have defects and shortcomings, and need further improvement and development. Utility Model Content

[0004] The main purpose of this utility model is to propose a nap chair that aims to solve the problem of the locking mechanism of existing nap chairs being difficult to unlock and return to its original position.

[0005] To achieve the above objectives, this utility model proposes a nap chair, which includes:

[0006] A frame, on which crossbars are provided;

[0007] A seat plate, which is movably connected to the frame, has a limit plate at its bottom, and the crossbar is located below the seat plate;

[0008] A locking mechanism is rotatably fixed to the crossbar; the locking mechanism includes a supporting plate; the supporting plate abuts against the limiting plate; the end of the supporting plate abutting against the limiting plate is arc-shaped.

[0009] Preferably, the end of the limiting plate opposite to the seat plate is provided with a chamfer.

[0010] Preferably, the side contact surface where the limiting plate and the supporting plate abut against each other has an angle of 75° to 105° with the horizontal plane.

[0011] Preferably, the bottom of the seat plate is provided with reinforcing ribs arranged along the length direction of the seat plate, and the limiting plate is staggered with the reinforcing ribs.

[0012] Preferably, the end of the supporting plate that abuts against the limiting plate is provided with a rotating shaft, and the bottom of the seat plate is provided with a limiting groove, which is formed on the reinforcing rib;

[0013] When the nap chair is in seat mode, the rotating shaft is located within the limiting groove.

[0014] Preferably, the end of the abutment plate that abuts the limiting plate is provided with limiting frustums on both sides along the width direction of the seat plate, and the distance between the two limiting frustums matches the width of the reinforcing rib;

[0015] The two ends of the rotating shaft are respectively confined within the two limiting truncated cones.

[0016] Preferably, the vertical distance between the reinforcing rib and the crossbar decreases along the length of the seat plate.

[0017] Preferably, the locking mechanism further includes an unlocking plate, and the unlocking plate and the abutment plate are arranged sequentially along the length direction of the base plate;

[0018] A spring is fitted onto the crossbar; one end of the spring is connected to the crossbar, and the other end abuts against the unlocking plate.

[0019] Beneficial effects

[0020] This utility model provides a nap chair. The nap chair includes a frame, a seat, and a locking mechanism. A limit plate is provided at the bottom of the seat, and the locking mechanism includes a support plate that cooperates with the limit plate. By setting the end of the support plate that abuts against the limit plate to be arc-shaped to conform to the movement trajectory between the support plate and the limit plate, the support plate can make contact and separate from the limit plate more smoothly. The unlocking process no longer requires excessive force, avoiding jamming. When the chair needs to return from a reclining chair mode to a seat mode, the smooth transition of the arc-shaped end can facilitate the easy return of the support plate to its original position. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of the nap chair provided in this application;

[0023] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a partial three-dimensional structural diagram of the nap chair provided in this application.

[0025] Figure 4This is a partial exploded view of the nap chair provided in this application;

[0026] Figure 5 yes Figure 4 Enlarged diagram of point B in the middle.

[0027] Explanation of icon numbers:

[0028] label name label name 10 nap chair 11 frame; 12 Seat 13 Locking mechanism 111 crossbar 121 Limit plate 122 Reinforcing ribs 123 Limiting groove 131 Support plate 132 Rotating shaft 133 Limiting truncated cone 134 curved surface 135 chamfer 136 Unlock board 137 spring

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] This utility model proposes a nap chair 10.

[0034] Please refer to the following: Figures 1 to 4The first embodiment of this application provides a nap chair 10. The nap chair 10 includes a frame 11, a seat 12, and a locking mechanism 13. The frame 11 supports the weight of the nap chair 10, and a crossbar 111 is provided on the frame 11. The crossbar 111 is located below the frame 11 and is fixedly connected to the frame 11. The crossbar 111 serves as a mounting base for the locking mechanism 13, and its two ends are fixed to the sides of the frame 11. The seat 12 is movably connected to the frame 11 via a connector, and a limiting plate 121 is provided at the bottom of the seat 12 for engaging with the locking mechanism 13 to lock the nap chair 10. The locking mechanism 13 is rotatably fixed to the crossbar 111. By controlling the rotation of the locking mechanism 13, the nap chair 10 can maintain or disengage its seat position. The locking mechanism 13 includes a supporting plate 131, which can rotate around the crossbar 111 during the locking and unlocking process of the nap chair 10. The main function of the abutment plate 131 is to abut against the limiting plate 121, thereby locking the nap chair 10 by restricting its movement. The end of the abutment plate 131 that abuts against the limiting plate 121 is arc-shaped. Curved surfaces generally generate less friction when in contact with straight or sharp-angled surfaces. Therefore, the arc-shaped design ensures that when the abutment plate 131 contacts the limiting plate 121, it can slide and contact smoothly along a natural trajectory, reducing friction, avoiding jamming, and making unlocking and repositioning smoother and easier.

[0035] To further enhance the smoothness and ease of unlocking and repositioning, the limiting plate 121 has a chamfer 135 on the side facing away from the seat plate 12 and abutting against the supporting plate 131. The chamfer 135 design further reduces direct friction between the limiting plate 121 and the supporting plate 131 during unlocking and repositioning of the nap chair 10. Since the end of the chamfer 135 is no longer a sharp right angle or edge, the limiting plate 121 can more smoothly contact or separate from the supporting plate 131, reducing the risk of jamming and improving operational smoothness.

[0036] The sides where the limiting plate 121 and the supporting plate 131 abut against each other are the contact surfaces. To ensure smooth unlocking and reliable locking of the nap chair 10 during use, the angle between the contact surface and the horizontal plane is set to 105° to 75°. When the angle is 105°, the supporting plate 131 provides strong support to the limiting plate 121. In this case, the seat plate 12 is very stable in the locked state and is not easily loosened by external forces. Due to the design of the curved surface 134 and the chamfer 135, even at an angle of 105°, a relatively smooth unlocking and repositioning process can be ensured. When the angle is 90°, while ensuring that the supporting plate 131 and the limiting plate 121 have a certain supporting force, the locking mechanism 13 can be smoothly unlocked and repositioned. When the included angle is 75°, the locking mechanism 13 requires less force to unlock, and the unlocking and repositioning operations are very smooth; when the abutment plate 131 is subjected to a large external force, the abutment plate 131 and the limit plate 121 can also make close contact, and there will be no loosening or instability.

[0037] Please refer to the following: Figures 1 to 3 To enhance the stability of the nap chair 10 when locked, a reinforcing rib 122 is provided at the bottom of the seat plate 12 along its length, and the limiting plate 121 and the reinforcing rib 122 are staggered. The reinforcing rib 122 can effectively disperse the stress on the seat plate 12 when bearing weight, improve the overall stability of the seat plate 12, and prevent the seat plate 12 from bending or deforming during use. The staggered fixing of the limiting plate 121 and the reinforcing rib 122 allows the force on the limiting plate 121 to be transferred to the reinforcing rib 122, or the reinforcing rib 122 to transfer the force on the seat plate 12 to the limiting plate 121, thereby dispersing the pressure between the seat plate 12 and the locking mechanism 13 and avoiding local deformation or instability that may occur when a single structure is under stress.

[0038] Please refer to the following: Figure 2 , Figure 4 and Figure 5 To facilitate smoother unlocking, resetting, and mode transitions of the nap chair 10, a rotating shaft 132 is provided at the end of the supporting plate 131 that abuts against the limiting plate 121. The rotating shaft 132 is located on the side of the supporting plate 131 near the seat plate 12, and can rotate relative to the supporting plate 131. Because the rotating shaft 132 can roll on the limiting plate 121 and reinforcing rib 122 during unlocking, resetting, and mode transitions, friction between the supporting plate 131 and the limiting plate 121 and reinforcing rib 122 is reduced. A limiting groove 123 for accommodating the rotating shaft 132 is provided at the bottom of the seat plate 12, and the limiting groove 123 is formed on the reinforcing rib 122. When the nap chair 10 is in seat mode, the rotating shaft 132 is placed in the limiting groove 123; when the chair needs to be converted from seat mode to nap mode, the rotating shaft 132 disengages from the limiting groove 123 and can roll on the limiting plate 121 and the reinforcing rib 122.

[0039] To prevent the supporting plate 131 from shifting during use, two limiting frustums 133 are provided at the end of the supporting plate 131 that abuts against the limiting plate 121. The two limiting frustums 133 are located on both sides of the supporting plate 131 along the width direction of the base plate 12, and protrude towards the base plate 12. During the movement of the supporting plate 131, the limiting plate 121 and the reinforcing rib 122 remain between the two limiting frustums 133, ensuring that the supporting plate 131 is in the correct position. Both ends of the rotating shaft 132 are limited by the two limiting frustums 133, allowing the rotating shaft 132 to roll on the limiting plate 121 and the reinforcing rib 122 during shape transformation.

[0040] Please refer to the following: Figure 1 and Figure 3 The crossbar 111 is located below the seat plate 12, and its height can be lower than that of the limiting plate 121. To make the transformation of the nap chair 10 more smooth, when the height of the crossbar 111 is lower than that of the limiting plate 121, the vertical distance between the reinforcing rib 122 and the crossbar 111 decreases along the length of the seat plate 12. That is, the height of the reinforcing rib 122 from the crossbar 111 increases from one end of the seat to the other, forming a natural slope on the reinforcing rib 122, which provides guidance for the rotation shaft 132 to roll on the reinforcing rib 122.

[0041] Please see Figure 4 The locking mechanism 13 also includes an unlocking plate 136, which is located behind the abutment plate 131 and arranged sequentially with the abutment plate 131 along the length of the base plate 12. The unlocking plate 136 is used to control the release of the locking mechanism 13. A spring 137 is sleeved on the crossbar 111, with one end of the spring 137 connected to the crossbar 111 and the other end abutting against the unlocking plate 136. The elastic force of the spring 137 helps the abutment plate 131 to automatically return to its original position, thereby ensuring the smoothness and stability of the locking process. At the same time, the spring 137 can also always be in a certain compressed state to prevent the abutment plate 131 from disengaging from the limiting plate 121 in the locked state.

[0042] In summary, this utility model provides a nap chair, comprising: a frame with a crossbar on it; a seat movably connected to the frame, a limiting plate at the bottom of the seat, and the crossbar located below the seat; a locking mechanism rotatably fixed to the crossbar; the locking mechanism includes an abutment plate abutting the limiting plate; the end of the abutment plate abutting the limiting plate is arc-shaped. By setting the end of the abutment plate abutting the limiting plate to an arc shape, it conforms to the movement trajectory between the abutment plate and the limiting plate, allowing the abutment plate to contact and separate from the limiting plate more smoothly. The unlocking process no longer requires excessive force, avoiding jamming. When the chair needs to return from a reclining chair mode to a seat mode, the smooth transition of the arc-shaped end facilitates the easy return of the abutment plate to its original position.

[0043] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A nap chair, characterized in that, include, A frame, on which crossbars are provided; A seat plate, which is movably connected to the frame, has a limit plate at its bottom, and the crossbar is located below the seat plate; A locking mechanism is rotatably fixed to the crossbar; the locking mechanism includes a supporting plate; the supporting plate abuts against the limiting plate; the end of the supporting plate abutting against the limiting plate is arc-shaped.

2. The nap chair as described in claim 1, characterized in that, The end of the limiting plate opposite to the seat plate is chamfered.

3. The nap chair as described in claim 1, characterized in that, The side contact surface where the limiting plate abuts the supporting plate has an angle of 75° to 105° with the horizontal plane.

4. The nap chair as described in claim 1, characterized in that, The bottom of the seat plate is provided with reinforcing ribs arranged along the length of the seat plate, and the limiting plate is arranged alternately with the reinforcing ribs.

5. The nap chair as described in claim 4, characterized in that, The end of the abutment plate that abuts against the limiting plate is provided with a rotating shaft, and the bottom of the seat plate is provided with a limiting groove, which is formed on the reinforcing rib. When the nap chair is in seat mode, the rotating shaft is located within the limiting groove.

6. The nap chair as described in claim 5, characterized in that, The end of the abutment plate that abuts against the limiting plate is provided with limiting frustums on both sides along the width direction of the seat plate, and the distance between the two limiting frustums matches the width of the reinforcing rib. The two ends of the rotating shaft are respectively confined within the two limiting truncated cones.

7. The nap chair as described in claim 5, characterized in that, The vertical distance between the reinforcing rib and the crossbar decreases along the length of the base plate.

8. The nap chair as described in claim 1, characterized in that, The locking mechanism further includes an unlocking plate, and the unlocking plate and the abutment plate are arranged sequentially along the length direction of the base plate; A spring is fitted onto the crossbar; one end of the spring is connected to the crossbar, and the other end abuts against the unlocking plate.

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