Office chair with chair back quick mounting structure

Abstract

The utility model discloses an office chair with a chair back quick mounting structure. The office chair comprises a chair seat main body, a chair back main body and a fastening assembly, an inserting part is arranged on the chair back main body. And an insertion groove matched with the insertion part is formed in the chair seat main body. And the inserting part on the chair back main body is inserted into the slot. According to the utility model, the fastening assembly is arranged on the chair seat main body. The fastening assembly comprises a pulling fastener and a limiting fastener. And the pulling fastener is rotationally connected to the chair seat main body and can push the limiting fastener to extend outwards or retract during rotation. A limiting clamping groove matched with the limiting fastener is formed in the chair back main body. The limiting fastener can be inserted into the limiting clamping groove when extending outwards, so that the relative position between the chair back main body and the chair seat main body is limited, the situation that the chair back main body inclines forwards and is separated when the office chair is pushed forwards due to the fact that the size of the inserting part of the chair back main body is reduced is avoided, and the mounting stability between the chair back main body and the chair seat main body is improved.

Description

Technical Field

[0001] This utility model belongs to the field of office chair technology, specifically relating to an office chair with a quick-installation backrest structure. Background Technology

[0002] Office chairs, as a type of everyday office and living furniture, are widely used in people's lives. An office chair consists of legs, a seat, and a backrest, and offers good comfort. Currently, for the transportation of office chairs, most designs feature a detachable seat and backrest, facilitating the transport of both parts.

[0003] Chinese patent publication number CN212280628U discloses a chair back frame connection structure, including two parallel mounting parts on the chair back frame, a fixing part on the chair seat, and a connecting block. The connecting block has a left mounting position and a right mounting position on its left and right sides, respectively, into which the two mounting parts are respectively embedded. The mounting parts have locking through holes on their sides for locking screws to pass through, and both the left and right mounting positions have first threaded holes that engage with the locking screws. The bottom of the connecting block has a fixing position, into which the fixing part is connected and installed. The fixing part has a fixing hole for fixing screws to pass through, and the top of the connecting block has a second threaded hole that connects to the fixing position and engages with the fixing screws. The ends of the mounting parts are inserted into the left and right mounting positions and fixed with locking screws.

[0004] In the aforementioned patent, the backrest of the office chair is installed onto the seat via a plug-in connection and secured quickly with screws. However, the assembly process requires tools, making the installation cumbersome. Furthermore, screw installation is difficult and strenuous, making it inconvenient for users to install themselves; and the screws protrude from the backrest surface after installation, which is unsightly.

[0005] In addition, some office chairs use only a plug-in connection. To ensure the stability of the connection, the plug-in part is sized to be equal to or slightly larger than the slot on the chair, making insertion difficult. Reducing the size of the plug-in part results in lower connection stability. Utility Model Content

[0006] To overcome the shortcomings of existing technology, this utility model provides an office chair with a quick-installation backrest structure, which solves the technical problem of ensuring a stable connection between the backrest and the seat while facilitating the insertion and fixation of the backrest onto the seat.

[0007] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0008] An office chair with a quick-install backrest structure includes a seat body, a backrest body, and a fastening assembly. The backrest body has a connector. The seat body has a slot that mates with the connector. The connector on the backrest body is inserted into the slot.

[0009] The fastening assembly includes a lever fastener and a limiting fastener. The lever fastener is rotatably connected to the seat body and can push the limiting fastener outward or retract during rotation. The backrest body has a limiting slot that mates with the limiting fastener. The limiting fastener can be inserted into the limiting slot when extended.

[0010] Furthermore, transmission components are fixed to both sides of the limiting fastener. The latching component has a movable groove that mates with the transmission component. The outer end of the transmission component on the limiting fastener extends into the corresponding movable groove.

[0011] Furthermore, the chair seat body is provided with a positioning bead assembly. The limiting fastener has multiple locking grooves that mate with the positioning bead assembly. The positioning bead assembly can extend outward when aligned with the corresponding locking groove, thereby limiting the position of the limiting fastener.

[0012] Furthermore, the insertion part of the chair back body is provided with an upwardly inclined guide slope.

[0013] Furthermore, a limiting protrusion is provided on the bottom surface of the chair back body. An anti-detachment groove is provided on the chair seat body to cooperate with the limiting protrusion. The limiting protrusion on the chair back body is embedded in the anti-detachment groove.

[0014] Furthermore, the positioning bead assembly includes a positioning bead and an elastic element. The positioning bead is capable of extending outward under the action of the elastic element.

[0015] Furthermore, the chair seat body has a mounting groove that mates with the buckle; the buckle is rotatably connected within the mounting groove. The mounting groove is divided into a rotating groove section and a connecting section connected in sequence. A pin is rotatably mounted in the rotating groove section. The top of the buckle is connected to the pin. The bottom of the connecting section is open.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention features a fastening assembly on the chair seat body. The fastening assembly includes a lever fastener and a limiting fastener. The lever fastener is rotatably connected to the chair seat body and can push the limiting fastener outward or retract during rotation. The chair back body has a limiting slot that mates with the limiting fastener. The limiting fastener can insert into the limiting slot when extended, thereby limiting the relative position between the chair back body and the chair seat body. This prevents the chair back body from tilting forward and detaching when the office chair is pushed forward due to a reduction in the size of the insertion part of the chair back body, thus improving the stability of the installation between the chair back body and the chair seat body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the relative positions of the chair seat body, chair back body, and fastening components in this utility model;

[0020] Figure 3 This is a schematic diagram of the fastening assembly in this utility model;

[0021] Figure 4 This is a schematic diagram of the main body of the chair back in this utility model.

[0022] Reference numerals in the attached drawings: 1. Seat body; 2. Backrest body; 3. Fastening assembly; 4. Buckle fastener; 5. Limiting fastener; 6. Mounting groove; 6-1. Rotating groove; 6-2. Connecting part; 7. Limiting slot; 8. Transmission component; 9. Insertion part; 10. Slot; 11. Positioning bead assembly; 12. Guide slope; 13. Limiting protrusion; 14. Anti-detachment groove. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1 and 2As shown, an office chair with a quick-installation backrest structure includes a seat body 1, a backrest body 2, and a fastening assembly 3. The backrest body 2 has a connector 9 at its bottom end. The seat body 1 has a slot 10 that mates with the connector 9. During installation, the connector 9 on the backrest body 2 is inserted into the slot 10. The fastening assembly 3 is installed on the seat body 1 to limit the relative position between the backrest body 2 and the seat body 1, preventing the backrest body 2 from tilting forward and detaching when the office chair is pushed forward.

[0026] The specific structure is as follows: Figure 2 , 3 As shown in Figure 4, the fastening assembly 3 includes a lever fastener 4 and a limiting fastener 5. The chair seat body 1 has a mounting groove 6 that mates with the lever fastener 4. The lever fastener 4 is rotatably connected within the mounting groove 6 and can rotate under external force. The chair seat body 1 has a sliding groove that communicates with the mounting groove 6. The limiting fastener 5 is slidably connected within the sliding groove and can extend or retract under the rotational push of the lever fastener 4. The chair back body 2 has a limiting slot 7 that mates with the limiting fastener 5. When the limiting fastener 5 extends outward under the push of the lever fastener 4, it will embed into the limiting slot 7, further securing the connection between the chair seat body 1 and the chair back body 2, preventing the chair back body 2 from tilting forward and disengaging when the office chair is pushed forward.

[0027] like Figure 2 and 3 As shown, the mounting groove 6 is divided into a rotating groove section 6-1 and a connecting section 6-2 connected in sequence. A pin is rotatably mounted in the rotating groove section 6-1. The top of the latching member 4 is connected to the pin, allowing the latching member 4 to rotate under the application of external force by the user. The bottom of the connecting section 6-2 is open, facilitating the user to apply force to the latching member 4.

[0028] like Figure 3 As shown, transmission components 8 are fixed on both sides of the limiting fastener 5. The lever fastener 4 has a movable groove that mates with the transmission component 8. The outer end of the transmission component 8 on the limiting fastener 5 extends into the corresponding movable groove. In use, when the user applies downward pressure or upward thrust to the bottom of the lever fastener 4, the lever fastener 4 rotates around the top pin, and through the transmission component 8, pushes the limiting fastener 5 to extend outward or pulls the limiting fastener 5 to retract.

[0029] Furthermore, a positioning bead assembly 11 is provided on the bottom surface of the slide groove in the main body 1 of the chair seat. The limiting fastener 5 has multiple locking grooves that cooperate with the positioning bead assembly 11. When the limiting fastener 5 extends outward or retracts to its limit position under the push of the lever 4, the corresponding locking groove on the limiting fastener 5 aligns with the positioning bead assembly 11, and the positioning bead assembly 11 extends outward, thus limiting the position of the limiting fastener 5. Specifically, the positioning bead assembly 11 includes a positioning bead and an elastic element. The positioning bead can extend outward under the action of the elastic element, cooperating with the locking groove on the limiting fastener 5 to lock the position of the limiting fastener 5.

[0030] In this embodiment, the insertion portion 9 of the chair back body 2 is provided with an upwardly inclined guide slope 12, so that the inner end size of the insertion portion 9 is smaller than the size of the slot 10 on the chair seat body 1, making it easier for the user to insert the insertion portion 9 into the slot 10. At the same time, by providing the fastening component 3, the structural stability of the chair back body 2 due to the small size of the insertion portion 9 when pushed forward is effectively avoided, thus preventing wobbling and detachment.

[0031] Furthermore, two limiting protrusions 13 are symmetrically arranged on the bottom surface of the chair back body 2. The chair seat body 1 is provided with an anti-detachment groove 14 that cooperates with the limiting protrusions 13. The limiting protrusions 13 on the chair back body 2 are embedded in the anti-detachment groove 14, thereby preventing the chair back body 2 from detaching from the chair seat body 1 during use.

[0032] The specific installation principle of this utility model is as follows:

[0033] During installation, the chair back body 2 is inserted into the chair seat body 1 while tilted forward. The guide slope 12 on the insertion part 9 of the chair back body 2 is flush with the bottom surface of the slot 10. When the chair back body 2 is inserted to its limit position, the limiting protrusion 13 in the chair back body 2 is positioned above the anti-disengagement groove 14 of the chair seat body 1. By pressing down on the chair back body 2, the user causes the limiting protrusion 13 to engage with the anti-disengagement groove 14, thus preventing the chair back body 2 from disengaging in the insertion / removal direction during subsequent use.

[0034] After the backrest body 2 is inserted, the user applies downward pressure to the bottom of the buckle 4. The buckle 4 rotates around the top pin and pushes the limiting fastener 5 outward through the transmission component 8, so that it is embedded in the limiting slot 7 on the backrest body 2. This further tightens the connection between the seat body 1 and the backrest body 2, preventing the backrest body 2 from tilting forward and coming off when the office chair is pushed forward.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An office chair with a quick-installation backrest structure, comprising a seat body (1) and a backrest body (2); the backrest body (2) is provided with a plug-in part (9); the seat body (1) is provided with a slot (10) that mates with the plug-in part (9); the plug-in part (9) on the backrest body (2) is plugged into the slot (10), characterized in that: It also includes fastening components (3). The fastening assembly (3) includes a buckle (4) and a limiting fastener (5); the buckle (4) is rotatably connected to the seat body (1) and can push the limiting fastener (5) to extend or retract when rotating; the backrest body (2) is provided with a limiting slot (7) that cooperates with the limiting fastener (5); the limiting fastener (5) can be inserted into the limiting slot (7) when extended.

2. An office chair having a quick mounting structure of a chair back according to claim 1, characterized in that: Both sides of the limiting fastener (5) are fixed with transmission components (8); the buckle (4) is provided with a movable groove that cooperates with the transmission component (8); the outer end of the transmission component (8) on the limiting fastener (5) extends into the corresponding movable groove.

3. An office chair having a quick mounting structure of a chair back according to claim 1, characterized in that: The chair seat body (1) is provided with a positioning bead assembly (11); the limiting fastener (5) is provided with a plurality of locking grooves that cooperate with the positioning bead assembly (11); the positioning bead assembly (11) can extend outward when aligned with the corresponding locking groove, thereby limiting the position of the limiting fastener (5).

4. An office chair having a quick mounting structure of a chair back according to claim 1, characterized in that: The backrest body (2) has an upwardly inclined guide slope (12) on the insertion part (9).

5. An office chair having a quick mounting structure of a chair back according to claim 1, characterized in that: The bottom surface of the chair back body (2) is provided with a limiting protrusion (13); the chair seat body (1) is provided with an anti-detachment groove (14) that cooperates with the limiting protrusion (13); the limiting protrusion (13) on the chair back body (2) is embedded in the anti-detachment groove (14).

6. An office chair having a quick mounting structure of a chair back according to claim 3, characterized in that: The positioning bead assembly (11) includes a positioning bead and an elastic element; the positioning bead can extend outward under the action of the elastic element.

7. An office chair having a quick mounting structure of a chair back according to claim 1, characterized in that: The main body (1) of the chair seat is provided with an installation groove (6) that cooperates with the buckle (4); the buckle (4) is rotatably connected in the installation groove (6); the installation groove (6) is divided into a rotating groove (6-1) and a connecting part (6-2) connected in sequence; a pin is rotatably provided in the rotating groove (6-1); the top of the buckle (4) is connected to the pin; the bottom of the connecting part (6-2) is open.

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