Chair back waist support adjusting mechanism

Abstract

The utility model discloses a chair back waist support adjusting mechanism which comprises a chair back body, waist support plates are connected to the two sides of the chair back body through adjusting mechanisms, the adjusting mechanisms are used for controlling the waist support plates to be locked in the stroke of the chair back body, each adjusting mechanism comprises a female fastener, and one side of each female fastener is provided with a male fastener which is in interlocking fit with the female fastener. According to the waist protection device, the waist protection plate can be rapidly adjusted to any position in the stroke through the adjusting mechanism and locked, and therefore the waist of a user can be effectively supported.

Description

Technical Field

[0001] The utility model belongs to the technical field of chair back adjustment, in particular to a chair back waist protection adjustment mechanism. Background Art

[0002] Chairs are one of the most commonly used office furniture and play an important role in family life and daily office. In order to improve the comfort brought by chairs to a certain extent, ergonomic chairs are very popular. They can be adjusted according to the body shape of different people to achieve a comfortable use effect.

[0003] Among them, document CN214760132U discloses a three-section elastic lumbar protection structure chair, which mainly solves the following problems: during the use of existing chairs, the lower back and waist of the human body will move away from the backrest, thereby creating a gap. If a person sits on the chair for a long time, the waist will feel uncomfortable. However, it was found during long-term use that due to its adaptive lumbar support structure, it cannot be locked in any position. When a person adjusts the seat to a certain comfortable sitting position, it will still swing to a certain extent, resulting in a weaker supporting force. In order to optimize this solution, practitioners have designed a chair back lumbar protection adjustment mechanism. Utility Model Content

[0004] The purpose of the utility model is to provide a chair back lumbar support adjustment mechanism to solve the problem that the existing chair back lumbar support adjustment mechanism cannot be locked at any position and still produces a certain swing when the person adjusts to a certain sitting posture, thereby causing the support force to be weak.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: a chair back waist protection adjustment mechanism, comprising a chair back body, both sides of the chair back body are connected with waist protection plates through an adjustment mechanism, and the adjustment mechanism is used to control the waist protection plate to be locked within the travel of the chair back body;

[0006] The adjustment mechanism comprises a female fastener, one side of the female fastener is provided with a sub-fastener which forms an interlocking fit therewith, and one end of the sub-fastener is provided with a pressing piece which controls the interlocking position thereof.

[0007] Furthermore, a female buckle groove for fixing the female buckle is provided on the chair back body, and a cover plate is fastened to the outer side of the female buckle groove.

[0008] Furthermore, the female fastener includes a fixed portion and a rotating portion, the fixed portion is fixed in the female fastener groove, the rotating portion is rotatably arranged on the waist guard plate, and a plurality of tooth grooves are evenly distributed on the side wall of the rotating portion.

[0009] Furthermore, limiting grooves for limiting the maximum locking position of the sub-fastener are provided on both sides of the tooth groove.

[0010] Furthermore, a sub-buckle groove for limiting the rotation space of the sub-buckle is provided on the waist guard plate, a pin shaft groove is provided on one side of the sub-buckle groove, and the rotating part is placed in the pin shaft groove.

[0011] Furthermore, the sub-fastener includes a pressing portion and a locking portion, and the end of the locking portion is provided with a claw that cooperates with the tooth groove.

[0012] Furthermore, the claws are provided in at least two groups.

[0013] Beneficial effects: The utility model has reasonable design, simple and stable structure, strong practicality, and has the following beneficial effects:

[0014] 1. The adjustment mechanism allows the lumbar support to be precisely moved and locked on the main body of the chair back to adapt to the different needs of users and improve comfort and support;

[0015] 2. The interlocking design of the mother fastener and the child fastener ensures that the waist guard can be firmly fixed after adjustment to avoid loosening or deviation during use;

[0016] 3. The push-piece design makes the adjustment process simple and convenient, and users can easily adjust the position of the waist guard without complicated tools or operating steps;

[0017] 4. The design of the tooth groove and claw enhances the durability of the adjustment mechanism, reduces the possibility of wear and failure, and increases the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the matching structure of the chair back body and the waist protection plate of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the main body of the chair back of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the female fastener of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the waist protection plate of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the sub-fastener of the utility model.

[0024] In the figure: 1-chair back body, 2-adjustment mechanism, 3-lumbar support plate;

[0025] 101-female buckle slot, 102-cover plate, 201-female buckle, 202-sub-fastener, 203-pressing member, 301-sub-buckle slot, 302-pin shaft slot;

[0026] 2011-fixing part, 2012-rotating part, 2013-tooth groove, 2014-limiting groove, 2021-pressing part, 2022-locking part, 2023-claw. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Embodiment 1:

[0029] Combination Figure 1-2 The lumbar support adjustment mechanism for a chair back shown in the figure comprises a chair back body 1, which is the main structural part of the chair and is used to support the overall structure of the chair back. Both sides of the chair back body 1 are connected with lumbar support plates 3 through adjustment mechanisms 2. The adjustment mechanisms 2 are used to control the lumbar support plates 3 to be locked within the travel range on the chair back body 1. The lumbar support plates 3 are used to provide additional lumbar support. The lumbar support plates 3 can be adjusted in position according to the needs of the user under the action of the adjustment mechanisms 2.

[0030] The adjustment mechanism 2 includes a female fastener 201, and a sub-fastener 202 is provided on one side of the female fastener 201 to form an interlocking fit therewith. One end of the female fastener 201 is fixed to the chair back body 1, and the other end is rotatably connected to the lumbar guard plate 3, while the sub-fastener 202 is arranged in the lumbar guard plate 3, and a pressing piece 203 is provided on one end of the sub-fastener 202 to control its interlocking position.

[0031] Combination Figure 3 The chair back body 1 shown is provided with a female buckle groove 101 for fixing the female buckle 201 , and a cover plate 102 is fastened to the outer side of the female buckle groove 101 . The female buckle groove 101 is used to fix one end of the female buckle 201 to the chair back body 1 and is sealed and fixed by the cover plate 102 .

[0032] Combination Figure 4The female fastener 201 shown includes a fixed portion 2011 and a rotating portion 2012. The fixed portion 2011 is fixed in the female fastener groove 101. The fixed portion 2011 is designed to be suitable for the shape inside the female fastener groove 101, and usually includes a protruding portion or a slot to ensure that it can be firmly fixed in the slot. The fixed portion 2011 is fixed in the female fastener groove 101 by bolts, snaps or other mechanical connection methods. The design of the fixed portion 2011 needs to ensure that it will not loosen under force or vibration. The rotating portion 2012 is rotatably set on the waist guard plate 3. A number of tooth grooves 2013 are evenly distributed on the side wall of the rotating portion 2012, which are designed to have a specific tooth shape to adapt to the subsequent engagement with the claw 2023, and provide an adjustable fixed point to achieve fine-tuning or locking functions. In addition, limit grooves 2014 are set on both sides of the tooth groove 2013 to limit the maximum locking position of the sub-fastener 202, so that it can be locked at a specific position to prevent accidental adjustment.

[0033] Combination Figure 5 The waist guard plate 3 shown is provided with a sub-buckle groove 301 for limiting the rotation space of the sub-buckle 202. This rotation space is defined according to the size of the sub-buckle 202. A pin groove 302 is provided on one side of the sub-buckle groove 301. The rotating part 2012 is placed in the pin groove 302. The rotating part 2012 is designed to be able to rotate freely in the pin groove 302, thereby realizing the rotation adjustment position of the waist guard plate 3.

[0034] Combination Figure 6 The sub-fastener 202 shown includes a pressing portion 2021 and a locking portion 2022. The end of the locking portion 2022 is provided with a claw 2023 that cooperates with the tooth groove 2013. The pressing portion 2021 is used to be acted upon by the pressing member 203, so that the user can control the locking or releasing mechanism of the entire sub-fastener 202. The pressing member 203 is designed as an area that the user can press with his hands or tools. The pressing member 203 usually includes a spring or other pressure device so that when the user presses, the locking portion 2022 can be pushed or pulled. The claw 2023 is mainly responsible for cooperating with the tooth groove 2013 of the rotating portion 2012, and its end is designed to be precisely matched with the tooth groove 2013. The shape is usually tooth-shaped or claw-shaped to ensure reliable locking. At least two groups of claws 2023 are provided, which correspond to multiple tooth groove positions of the tooth groove 2013. This design ensures more accurate positioning and locking, and improves the stability and reliability of the system. In addition, when the pressing part 2021 is pressed by the pressing piece 203 during operation, the claw 2023 will pop out or move from the tooth groove 2013, thereby releasing the locked state, and the rotation position of the waist guard plate 3 can be adjusted. When the pressing part 2021 is released, the claw 2023 will be re-engaged in the tooth groove 2013 at the corresponding position to ensure that the rotating part 2012 maintains a stable position on the waist guard plate 3.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A chair back waist adjustment mechanism, characterized in that: It comprises a chair back body (1), both sides of the chair back body (1) are connected to lumbar protection plates (3) via adjustment mechanisms (2), and the adjustment mechanisms (2) are used to control the lumbar protection plates (3) to be locked within a travel range on the chair back body (1); The adjustment mechanism (2) comprises a female fastener (201), one side of the female fastener (201) is provided with a sub-fastener (202) which forms an interlocking fit therewith, and one end of the sub-fastener (202) is provided with a pressing piece (203) which controls its interlocking position.

2. A chair back waist adjustment mechanism according to claim 1, characterized in that: The chair back body (1) is provided with a female buckle groove (101) for fixing the female buckle (201), and a cover plate (102) is fastened to the outside of the female buckle groove (101).

3. The chair back waist adjustment mechanism according to claim 2, characterized in that: The female fastener (201) comprises a fixed portion (2011) and a rotating portion (2012), wherein the fixed portion (2011) is fixed in the female fastener groove (101), and the rotating portion (2012) is rotatably disposed on the waist protection plate (3), and a plurality of tooth grooves (2013) are evenly distributed on the side wall of the rotating portion (2012).

4. The chair back waist adjustment mechanism according to claim 3, characterized in that: Limiting grooves (2014) for limiting the maximum locking position of the sub-fastener (202) are provided on both sides of the tooth groove (2013).

5. The chair back waist adjustment mechanism according to claim 4, characterized in that: The waist guard plate (3) is provided with a sub-buckle groove (301) for limiting the rotation space of the sub-buckle (202), a pin shaft groove (302) is provided on one side of the sub-buckle groove (301), and the rotating part (2012) is placed in the pin shaft groove (302).

6. The chair back waist adjustment mechanism according to claim 5, characterized in that: The sub-fastener (202) comprises a pressing portion (2021) and a locking portion (2022), and the end of the locking portion (2022) is provided with a claw (2023) that cooperates with the tooth groove (2013).

7. The chair back waist adjustment mechanism according to claim 6, characterized in that: The clamping claws (2023) are provided in at least two groups.

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