A plastic chair back with a splice

Abstract

The utility model relates to the technical field of plastic chair backrest, concretely to a spliced plastic chair backrest, include: backrest, be equipped with the vent hole on the surface of backrest, be equipped with the mounting groove on the surface of backrest, the first vice chair back and second vice chair back are movably installed in mounting groove, be equipped with the vice vent hole on the surface of first vice chair back, the surface of second vice chair back is fixed with cotton pad, beneficial effect is: when using backrest in summer, install first vice chair back in mounting groove, and the vent hole and the vice vent hole are aligned respectively, make backrest have good ventilation capacity, make the person who rides can use this spliced plastic chair backrest more coolly in summer, when using backrest in winter, install second vice chair back in mounting groove, and the cotton pad fixed on the surface of second vice chair back makes backrest have good warm -keeping effect, and the second vice chair back is sealed to vent hole simultaneously, make the person who rides can use this spliced plastic chair backrest more warmly in winter.

Description

Technical Field

[0001] This utility model relates to the field of plastic chair backs, specifically a spliced ​​plastic chair back. Background Technology

[0002] The modular plastic chair back is a type of chair back structure that achieves both convenient transportation and structural stability through separate manufacturing and assembly.

[0003] In the prior art, Chinese patent application number CN202422113910.2 discloses a modular outdoor plastic chair, including a seat board, supporting side panels, a backrest, connecting columns, stool legs, anti-slip pads, a first snap-fit ​​mechanism, and a second snap-fit ​​mechanism. Supporting side panels are provided on both sides of the seat board, stool legs are provided at the front and rear of the lower end of each supporting side panel, and connecting columns are provided at the rear of the upper end of each supporting side panel. A backrest is provided between the connecting columns. A first snap-fit ​​mechanism is provided between the seat board and the supporting side panels, and a second snap-fit ​​mechanism is provided between the backrest and the connecting columns. Anti-slip pads are provided at the lower end of each stool leg. The advantages of this utility model compared to the prior art are: convenient transportation with less transport space; easy assembly with auxiliary fixing function; and the connecting parts are not easily detached during installation.

[0004] However, the backrests of existing modular outdoor plastic chairs are breathable in summer, making them cooler and more comfortable for riders. But in winter, their excessive breathability can cause riders' backs to feel cold, making them uncomfortable to use in winter. Utility Model Content

[0005] The purpose of this utility model is to provide a spliced ​​plastic chair back to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a spliced ​​plastic chair back.

[0007] Includes: a backrest, on the surface of which ventilation holes are formed, and on the surface of which an installation groove is formed, in which a first backrest and a second backrest are movably installed, the surface of which the first backrest has a secondary ventilation hole, and the surface of which a cotton pad is fixed.

[0008] Preferably, the ventilation holes and secondary ventilation holes are provided in several groups, and the several groups of ventilation holes are respectively aligned with the several groups of secondary ventilation holes.

[0009] Preferably, the surface of the backrest is provided with insertion holes, which are rectangular holes. There are two sets of insertion holes, and the two sets of insertion holes are symmetrically distributed about the backrest.

[0010] Preferably, two sets of plug rods are fixed on the surface of the second chair back. The plug rods are rectangular rods, and the two sets of plug rods are movably inserted into the two sets of plug holes respectively.

[0011] Preferably, a limiting block mounting groove is formed on the surface of the plug rod, one end of the limiting block is movably inserted into the limiting block mounting groove, the other end of the limiting block extends out of the limiting block mounting groove, and the side of the end of the limiting block extending out of the limiting block mounting groove abuts against the surface of the backrest.

[0012] Preferably, a limiting spring is movably installed in the limiting block mounting groove, with one end of the limiting spring abutting against the inner wall of the limiting block mounting groove and the other end of the limiting spring abutting against the limiting block.

[0013] Preferably, the surface of the limiting block is provided with an elastic plate mounting groove, one end of the elastic plate is fixed in the elastic plate mounting groove, and a locking rod is fixed to the side of the other end of the elastic plate.

[0014] Preferably, a guide rail is provided on the surface of the plug rod, and the locking rod is slidably connected in the guide rail.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The modular plastic chair backrest proposed in this utility model allows for better ventilation in summer. In summer, the first backrest is installed in the mounting groove, with several sets of ventilation holes and secondary ventilation holes aligned to ensure good airflow, allowing the user to use the modular plastic chair backrest more comfortably. In winter, the second backrest is installed in the mounting groove. The cotton padding fixed to the surface of the second backrest provides good insulation, while simultaneously sealing the ventilation holes, allowing the user to use the modular plastic chair backrest more comfortably in winter. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 A cross-sectional structural diagram showing the installation state of the backrest and the first chair back;

[0019] Figure 3 A cross-sectional structural diagram showing the installation state of the backrest and the second chair back;

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0022] In the diagram: 1. Backrest; 2. Ventilation hole; 3. Mounting slot; 4. First backrest; 5. Secondary vent; 6. Secondary backrest; 7. Pad; 8. Plug-in hole; 9. Plug-in rod; 10. Limiting block mounting slot; 11. Limiting block; 12. Limiting spring; 13. Elastic plate mounting slot; 14. Elastic plate; 15. Locking rod; 16. Guide rail. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Example 1: Please refer to Figures 1-5 This utility model provides a technical solution: a spliced ​​plastic chair back, including: a backrest 1, with ventilation holes 2 on the surface of the backrest 1, and an installation groove 3 on the surface of the backrest 1. A first chair back 4 and a second chair back 6 are movably installed in the installation groove 3. A secondary ventilation hole 5 is provided on the surface of the first chair back 4, and a cotton pad 7 is fixed on the surface of the second chair back 6. Several sets of ventilation holes 2 and secondary ventilation holes 5 are provided, and the several sets of ventilation holes 2 are respectively aligned with the several sets of secondary ventilation holes 5.

[0025] In actual use, when using backrest 1 in summer, the first backrest 4 is installed in the mounting groove 3, and several sets of ventilation holes 2 and several sets of secondary ventilation holes 5 are aligned to give backrest 1 good ventilation, allowing passengers to use the spliced ​​plastic chair backrest more coolly in summer; when using backrest 1 in winter, the second backrest 6 is installed in the mounting groove 3, and the cotton pad 7 fixed on the surface of the second backrest 6 gives backrest 1 good warmth retention, while the second backrest 6 also seals the ventilation holes 2, allowing passengers to use the spliced ​​plastic chair backrest more warmly in winter.

[0026] Example 2: Based on Example 1, in order to movably install the first chair back 4 and the second chair back 6 into the mounting groove 3, the surface of the backrest 1 is provided with insertion holes 8. The insertion holes 8 are rectangular holes, and there are two sets of insertion holes 8. The two sets of insertion holes 8 are symmetrically distributed about the backrest 1. The surface of the second chair back 6 is fixed with two sets of insertion rods 9. The insertion rods 9 are rectangular rods. The two sets of insertion rods 9 are movably inserted into the two sets of insertion holes 8 respectively. The surface of the insertion rods 9 is provided with a limit block mounting groove 10. One end of the limit block 11 is movably inserted into the limit block mounting groove 10. The other end of the limit block 11 extends out of the limit block mounting groove 10. The side of the end of the limit block 11 extending out of the limit block mounting groove 10 abuts against the surface of the backrest 1. A limit spring 12 is movably installed in the limit block mounting groove 10. One end of the limit spring 12 abuts against the inner wall of the limit block mounting groove 10, and the other end of the limit spring 12 abuts against the limit block 11.

[0027] When it is necessary to install the first chair back 4 or the second chair back 6 into the mounting slot 3, insert the plug rod 9 on the surface of the first chair back 4 or the second chair back 6 into the plug hole 8. During insertion, the limiting block 11 is fully retracted into the limiting block mounting slot 10 under the guidance of the inclined surface, and the limiting spring 12 is compressed. When the end of the plug rod 9 away from the first chair back 4 or the second chair back 6 extends out of the plug hole 8, the limiting spring 12 pushes one end of the limiting block 11 out of the limiting block mounting slot 10, and limits the plug rod 9 in the plug hole 8, thus completing the installation of the first chair back 4 or the second chair back 6 into the mounting slot 3.

[0028] Example 3: Based on Example 2, in order to replace the limiting spring 12, an elastic plate mounting groove 13 is provided on the surface of the limiting block 11. One end of the elastic plate 14 is fixed in the elastic plate mounting groove 13, and a locking rod 15 is fixed on the side of the other end of the elastic plate 14. A guide rail 16 is provided on the surface of the plug rod 9, and the locking rod 15 is slidably connected in the guide rail 16.

[0029] When the limit spring 12 needs to be replaced, use a thin object to push the lever 15 to disengage it from the guide rail 16. Then, the limit block 11 can be removed from the limit block mounting slot 10. Remove the old limit spring 12 from the limit block mounting slot 10 and install the new limit spring 12 back into the limit block mounting slot 10. Then, press the lever 15 again to fully retract it into the elastic plate mounting slot 13. At this time, the elastic plate 14 bends, allowing the limit block 11 to be installed back into the limit block mounting slot 10. When the lever 15 is aligned with the guide rail 16, the elastic plate 14 returns to its original shape under its own elasticity, and the lever 15 is reinserted into the guide rail 16, thus completing the replacement of the limit spring 12.

[0030] In actual use, when using backrest 1 in summer, the first backrest 4 is installed in the mounting groove 3, with several sets of ventilation holes 2 and several sets of secondary ventilation holes 5 aligned to ensure good ventilation for backrest 1, allowing passengers to use the interlocking plastic chair backrest more comfortably in summer. When using backrest 1 in winter, the second backrest 6 is installed in the mounting groove 3. The cotton pad 7 fixed to the surface of the second backrest 6 provides good warmth for backrest 1, while the second backrest 6 also provides ventilation. The air vent 2 is sealed to allow passengers to use the modular plastic chair back warmer in winter. When it is necessary to install the first chair back 4 or the second chair back 6 into the mounting groove 3, the insertion rod 9 on the surface of the first chair back 4 or the second chair back 6 is inserted into the insertion hole 8. During insertion, the limiting block 11 is fully retracted into the limiting block mounting groove 10 under the guidance of the inclined surface, and the limiting spring 12 is compressed. When the end of the insertion rod 9 away from the first chair back 4 or the second chair back 6 extends out of the insertion hole 8... The limiting spring 12 pushes one end of the limiting block 11 out of the limiting block mounting groove 10, limiting the insertion rod 9 in the insertion hole 8, thus completing the installation of the first chair back 4 or the second chair back 6 in the mounting groove 3. When the limiting spring 12 needs to be replaced, use a thin object to push the locking rod 15, causing the locking rod 15 to disengage from the guide rail 16. Then, the limiting block 11 can be removed from the limiting block mounting groove 10, the old limiting spring 12 can be removed from the limiting block mounting groove 10, and the new one can be installed. The limit spring 12 is installed back into the limit block mounting slot 10. Then, the lever 15 is pressed again to fully retract into the elastic plate mounting slot 13. At this time, the elastic plate 14 bends, and the limit block 11 is installed back into the limit block mounting slot 10. When the lever 15 is aligned with the guide rail 16, the elastic plate 14 returns to its original shape under its own elasticity. The lever 15 is re-inserted into the guide rail 16, thus realizing the installation of the limit block 11 back into the limit block mounting slot 10, and completing the replacement of the limit spring 12.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular plastic chair back, comprising: Backrest (1), with ventilation holes (2) on the surface of the backrest (1), characterized in that: a mounting groove (3) is provided on the surface of the backrest (1), a first backrest (4) and a second backrest (6) are movably installed in the mounting groove (3), a secondary ventilation hole (5) is provided on the surface of the first backrest (4), and a cotton pad (7) is fixed on the surface of the second backrest (6).

2. The spliced ​​plastic chair backrest according to claim 1, characterized in that: The ventilation holes (2) and secondary ventilation holes (5) are provided in several groups, and the several groups of ventilation holes (2) are respectively aligned with the several groups of secondary ventilation holes (5).

3. The spliced ​​plastic chair backrest according to claim 1, characterized in that: The backrest (1) has a plug hole (8) on its surface. The plug hole (8) is rectangular and there are two sets of plug holes (8). The two sets of plug holes (8) are symmetrically distributed about the backrest (1).

4. A spliced ​​plastic chair backrest according to claim 3, characterized in that: Two sets of plug rods (9) are fixed on the surface of the second chair back (6). The plug rods (9) are rectangular rods, and the two sets of plug rods (9) are respectively movably inserted into the two sets of plug holes (8).

5. A spliced ​​plastic chair back according to claim 4, characterized in that: A limiting block mounting groove (10) is provided on the surface of the plug rod (9). One end of the limiting block (11) is movably inserted into the limiting block mounting groove (10). The other end of the limiting block (11) extends out of the limiting block mounting groove (10). The side of the end of the limiting block (11) extending out of the limiting block mounting groove (10) abuts against the surface of the backrest (1).

6. A spliced ​​plastic chair back according to claim 5, characterized in that: A limiting spring (12) is movably installed in the limiting block mounting groove (10). One end of the limiting spring (12) abuts against the inner wall of the limiting block mounting groove (10), and the other end of the limiting spring (12) abuts against the limiting block (11).

7. A spliced ​​plastic chair back according to claim 5, characterized in that: The limiting block (11) has an elastic plate mounting groove (13) on its surface. One end of the elastic plate (14) is fixed in the elastic plate mounting groove (13), and a locking rod (15) is fixed on the side of the other end of the elastic plate (14).

8. A spliced ​​plastic chair back according to claim 7, characterized in that: The surface of the plug rod (9) is provided with a guide rail (16), and the locking rod (15) is slidably connected in the guide rail (16).

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