A chassis assembly and a seat

Abstract

The utility model discloses a bottom disc assembly and seat. The utility model discloses a bottom disc assembly includes first casing, second casing and elastic sheet. Second casing rotation is connected in first casing, and first casing and second casing jointly define and hold the cavity, and the cavity is provided with the limiting module. The elastic sheet is detachably arranged in the holding cavity, and the limiting module and the elastic sheet abut to limit the elastic sheet to slide relative to the first casing and the second casing, and the elastic sheet abuts the first casing and the second casing simultaneously, when second casing rotates back to first casing, the elastic force of elastic sheet is used to drive second casing and rotates forward to reset. Through the internal structure is simplified to first casing, second casing and single elastic sheet, on one hand makes whole structure more simple, on the other hand, the deviation of single elastic sheet when installing will be smaller than the influence of the deviation of multiple elastic sheets after superposition, and will not exist the problem such as the asymmetric stress of multiple elastic sheets, effectively promotes the experience of leaning back.

Description

Technical Field

[0001] This utility model relates to the field of seat component technology, specifically to a chassis assembly and a seat. Background Technology

[0002] Nowadays, chairs are a common piece of equipment used by people in their daily lives, and a comfortable chair back is one of the needs of people. One of the factors affecting the comfort of the chair back is the reclining function of the chair back. Furthermore, the chair back is designed with the function of automatically returning to its original position after external force is eliminated. However, chairs with reclining and return functions in related technologies have problems such as complex structure and poor reclining experience. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a chassis assembly that simplifies the chassis assembly structure and improves the rear-tilt experience.

[0004] This utility model also proposes a seat having the above-mentioned chassis components.

[0005] According to a first aspect of the present invention, a chassis assembly includes a first housing, a second housing, and a spring. The second housing is rotatably connected to the first housing, and the first housing and the second housing together define a receiving cavity, within which a limiting module is disposed. The spring is detachably disposed in the receiving cavity, and the limiting module abuts against the spring to restrict the spring from sliding relative to both the first housing and the second housing. The spring simultaneously abuts against both the first housing and the second housing. When the second housing rotates rearward relative to the first housing, the elastic force of the spring is used to drive the second housing forward to reset.

[0006] The chassis assembly according to the present invention has at least the following beneficial effects: In related technologies, the seat reclining function is achieved by setting a guide mechanism or a sliding mechanism, and then designing a spring for reset, or by setting multiple springs in the chassis assembly to achieve reset after reclining. However, the former has a complex structure, requiring multiple mechanisms or components to be set on the chassis assembly, while the latter inevitably has deviations during assembly. The cumulative installation deviations of multiple springs can easily lead to problems such as excessive or insufficient reclining force, inconsistent positions of each spring, and inconsistent elasticity values, resulting in asymmetrical force distribution and an unsmooth reclining process. The chassis assembly of the present invention simplifies the internal structure to a first shell, a second shell, and a single spring. This simplifies the overall structure, and the deviation of a single spring during installation has a smaller impact than the cumulative deviation of multiple springs, and avoids the problem of asymmetrical force distribution caused by multiple springs, effectively improving the reclining experience. Furthermore, the detachable single spring is easier to install and can reduce the size of chassis components compared to traditional structures, thus reducing space occupation and improving the lightweighting of chassis components.

[0007] According to some embodiments of the present invention, the limiting module includes a first limiting member, a second limiting member, and a third limiting member. The spring sheet has a limiting hole. The first limiting member passes through the limiting hole. The outer peripheral surface of the first limiting member abuts against the inner peripheral wall of the limiting hole to restrict the radial movement of the spring sheet along the limiting hole. The second limiting member abuts against both sides of the spring sheet along the width direction to limit the movement of the spring sheet along the width direction. The third limiting member abuts against both sides of the spring sheet along the thickness direction, respectively, with the inner wall of the accommodating cavity.

[0008] According to some embodiments of the present invention, the first limiting member and the second limiting member are respectively disposed at both ends of the spring sheet along the length direction.

[0009] According to some embodiments of the present invention, the first limiting member is integrally formed with the first housing, and the second limiting member is integrally formed with the second housing.

[0010] According to some embodiments of the present invention, the third limiting member has an abutment area, which is used to abut the lower surface of the spring piece, and the abutment area is close to the front end of the spring piece along the length direction.

[0011] According to some embodiments of this utility model, the minimum distance between the contact area and the foremost end of the spring piece is L1, and the length of the spring piece is L2, where 0.2L2≤L1≤0.5L2.

[0012] According to some embodiments of the present invention, the second housing includes a body portion and a protrusion portion, the protrusion portion protruding downward relative to the inner peripheral wall of the body portion, the protrusion portion being used to abut against the upper surface of the spring piece so that the spring piece and the body portion are spaced apart.

[0013] According to some embodiments of this utility model, the spring is made of glass fiber composite material or carbon fiber composite material.

[0014] The seat according to a second aspect embodiment of the present invention includes the chassis assembly described in any one of the first aspect embodiments.

[0015] The seat according to the embodiments of this utility model has at least the following beneficial effects: The chassis assembly of this utility model simplifies the internal structure to a first shell, a second shell, and a single spring piece. On the one hand, this makes the overall structure simpler; on the other hand, the deviation generated by a single spring piece during installation has a smaller impact than the combined deviation of multiple spring pieces, and it avoids problems such as asymmetrical force distribution caused by multiple spring pieces, effectively improving the reclining experience. Furthermore, the detachable single spring piece is also simpler to install, and compared to the traditional structure, it can reduce the size of the chassis assembly and reduce the space occupied. The seat using this chassis assembly can achieve improved reclining experience, simplified structure, and reduced overall size, meeting the requirements of lightweight design.

[0016] According to some embodiments of the present invention, the seat includes a backrest and legs, the backrest is connected to the second housing, and the legs are connected to the first housing.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a perspective view of the seat in one embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the seat in one embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the chassis assembly in one embodiment of the present invention;

[0022] Figure 4 This is a top view of the chassis assembly in one embodiment of the present invention;

[0023] Figure 5 for Figure 4 Sectional view of section line AA in the middle;

[0024] Figure 6 This is a perspective view of the second housing of the chassis assembly in one embodiment of the present invention.

[0025] Reference numerals: seat 100, chassis assembly 101, chair leg 102, chair back 103, first housing 201, second housing 202, spring 203, limiting hole 301, third limiting member 302, limiting module 401, first limiting member 402, second limiting member 403, accommodating cavity 404, main body 405, protrusion 406. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying 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.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Seats 100 are now a common piece of equipment used in daily life, and a comfortable seat back is a key requirement. One factor affecting backrest comfort is its reclining function. Furthermore, the seat back 103 is designed with an automatic reset function after external force is eliminated. However, existing seats 100 with reclining and reset functions suffer from complex structures and poor reclining experience. This invention proposes a chassis assembly 101 that simplifies its structure and improves the reclining experience.

[0032] refer to Figures 3 to 5 According to a first aspect of the present invention, a chassis assembly 101 includes a first housing 201, a second housing 202, and a spring piece 203. The second housing 202 is rotatably connected to the first housing 201. The first housing 201 and the second housing 202 together define a receiving cavity 404, and a limiting module 401 is provided in the receiving cavity 404. The spring piece 203 is detachably disposed in the receiving cavity 404. The limiting module 401 abuts against the spring piece 203 to limit the sliding of the spring piece 203 relative to the first housing 201 and the second housing 202. The spring piece 203 abuts against both the first housing 201 and the second housing 202. When the second housing 202 rotates backward relative to the first housing 201, the elastic force of the spring piece 203 is used to drive the second housing 202 to rotate forward to reset.

[0033] In related technologies, the reclining function of the seat 100 is achieved by setting a guide mechanism or a sliding mechanism, and then designing a spring to achieve reset. Alternatively, multiple springs 203 are set in the chassis assembly 101 to achieve reset after reclining. However, the former has a complex structure and requires multiple mechanisms or components to be set on the chassis assembly 101. In the latter, the structure of multiple springs 203 is bound to have deviations during assembly. The cumulative installation deviations of multiple springs 203 make the overall reclining experience of the seat 100 prone to problems such as excessive or insufficient reclining force, inconsistent position of each spring 203, and inconsistent elasticity value, resulting in asymmetrical force when reclining and an unsmooth reclining process. The chassis assembly 101 of this embodiment simplifies its internal structure into a first housing 201, a second housing 202, and a single spring 203. This simplifies the overall structure and reduces the impact of deviations during installation of a single spring 203 compared to the combined deviations of multiple springs 203. It also avoids issues such as asymmetrical force distribution caused by multiple springs 203, effectively improving the rearward tilting experience. Furthermore, the detachable single spring 203 simplifies installation and reduces the size of the chassis assembly 101 compared to traditional structures, thus minimizing space occupation and increasing its lightweight nature.

[0034] refer to Figures 3 to 6 In some embodiments of this utility model, the limiting module 401 includes a first limiting member 402, a second limiting member 403 and a third limiting member 302. The spring piece 203 has a limiting hole 301. The first limiting member 402 passes through the limiting hole 301. The outer peripheral surface of the first limiting member 402 abuts against the inner peripheral wall of the limiting hole 301 to limit the radial movement of the spring piece 203 along the limiting hole 301. The second limiting member 403 abuts against both sides of the spring piece 203 along the width direction to limit the movement of the spring piece 203 along the width direction. The third limiting member 302 abuts against both sides of the spring piece 203 along the thickness direction with the inner wall of the accommodating cavity 404. The first limiting member 402 can restrict the radial movement of the spring piece 203 through the limiting hole 301. The second limiting member 403 specifically restricts the movement of the spring piece 203 along the width direction. The third limiting member 302 provides a fulcrum for the elastic deformation of the spring piece 203, allowing the spring piece 203 to bend and deform under force, thereby achieving the function of tilting backward, and the rebound force after the external force is removed to achieve the function of resetting the second housing 202. The limiting module 401 as a whole restricts unnecessary shaking of the spring piece 203, allowing the spring piece 203 to bend better under external force. In related technologies, if multiple spring pieces 203 are designed in the chassis assembly 101, each spring piece 203 needs to be limited. Then, the cumulative installation deviation of each spring piece 203 will affect the overall tilting experience of the seat 100. The single spring piece 203 effectively improves this problem.

[0035] It should be noted that in some embodiments of this utility model, the limiting hole 301 may not be provided on the spring piece 203. The first limiting member 402 may be designed as a slot, and one end of the spring piece 203 may be designed as a buckle structure, which is engaged in the slot. This can also achieve the effect of limiting the movement of the spring piece 203. Opening a hole and designing the first limiting member 402 as a corresponding columnar structure is the preferred solution in the limiting structure.

[0036] refer to Figures 3 to 5 In some embodiments of this utility model, the first limiting member 402 and the second limiting member 403 are respectively disposed at both ends of the spring piece 203 along its length. By distributing the first limiting member 402 for radial limiting and the second limiting member 403 for width limiting at both ends of the spring piece 203, the force on the spring piece 203 is often more balanced, especially when compressed in the middle area, resulting in a more reasonable stress distribution. This effectively improves the service life of the spring piece 203 and optimizes the elasticity value, enhancing the experience of the seat 100% when reclining and rebounding. It should be noted that in some embodiments, the first limiting member 402 and the second limiting member 403 can also be disposed on the same side of the spring piece 203 to meet different spatial layout requirements.

[0037] refer to Figure 5 and Figure 6 In some embodiments of this utility model, the first limiting member 402 is integrally formed with the first housing 201, and the second limiting member 403 is integrally formed with the second housing 202. Specifically, the columnar protrusion of the first limiting member 402 can be integrally formed on the inner peripheral wall of the first housing 201, and the second limiting member 403 can also be integrally formed on the inner peripheral wall of the second housing 202. This further simplifies the structure and facilitates manufacturing. The integral forming also makes the positional accuracy of the first limiting member 402 and the second limiting member 403 higher, allowing for better installation of the spring piece 203. The detachable spring piece 203 is also easy to adjust and replace.

[0038] refer to Figure 3 and Figure 5 In some embodiments of this utility model, the third limiting member 302 has an abutment area for abutting the lower surface of the spring piece 203, and the abutment area is close to the front end of the spring piece 203 along its length. (See reference) Figure 5The abutment area abuts against the lower surface of the spring piece 203, and the inner peripheral wall of the first housing 201 abuts against the upper surface of the front end of the spring piece 203, thus forming a support for the spring piece 203. The abutment area also serves as a fulcrum for the bending of the spring piece 203. The bending of the spring piece 203 is mainly formed by the rearward bending of the second housing 202. Therefore, the farther the abutment area is from the rear end of the spring piece 203, the longer the deformable length of the spring piece 203. This restricts the front end of the spring piece 203, so that when the rear end of the spring piece 203 bends, it can generate an upward elastic force, which facilitates the subsequent rebound and reset of the second housing 202.

[0039] refer to Figure 5 In some embodiments of this utility model, the minimum distance between the abutment area and the foremost point of the spring piece 203 is L1, and the length of the spring piece 203 is L2, where 0.2L2≤L1≤0.5L2. This allows the fulcrum formed by the abutment area to have a better influence on the elastic force and structural stability of the spring piece 203. The abutment area affects the deformable length of the spring piece 203. When L1 is less than 0.2L2, the abutment area is too far forward, and the overall support of the spring piece 203 is not evenly distributed towards the front end, resulting in an excessively large elastic force, making the spring piece 203 prone to bending and structurally unstable. When L1 is greater than 0.5L2, the third limiting member 302 is relatively far back, and the position of the abutment area is relatively close to the rear end. The deformable length of the spring piece 203 is small, the elastic force is small, and the second shell 202 is not easy to rotate relative to the first shell 201, reducing the deformation utilization rate of the spring piece 203 and the comfort of the backward tilting process. It should be noted that, according to the reference... Figure 3 In some embodiments of this utility model, in order to provide better bending space for the spring piece 203, the abutment area is designed as a curved surface, with the middle of the curved surface protruding towards the spring piece 203, so that the spring piece 203 can be bent as... Figure 5 When the contact point is in the middle of the contact area, there is space on both sides for the spring piece 203 to rotate or bend, improving the user experience.

[0040] It should be noted that in some embodiments of this utility model, the third limiting member 302 is detachably connected to the first housing 201. The position of the third limiting member 302 can be adjusted according to actual needs to change the elastic force value of the spring piece 203. If the spring piece 203 needs to be more easily bent and deformed, the third limiting member 302 is set closer to the front end of the spring piece 203; otherwise, it can be set closer to the rear end of the spring piece 203.

[0041] refer to Figure 5 and Figure 6In some embodiments of this utility model, the second housing 202 includes a body portion 405 and a protrusion 406. The protrusion 406 protrudes downward relative to the inner peripheral wall of the body portion 405, and is used to abut against the upper surface of the spring piece 203 so that the spring piece 203 and the body portion 405 are spaced apart. The design of the protrusion 406 allows the spring piece 203 to be installed in the receiving cavity 404 as if... Figure 5 The deformation shown creates a slight rebound force that provides a certain constraint on the second housing 202 and the first housing 201, and allows them to be more stably positioned in the receiving cavity 404 to prevent them from falling off.

[0042] It should be noted that the reference Figure 5 and Figure 6 In some embodiments of this utility model, the protrusion 406 and the second limiting member 403 are disposed at the same position in the length direction of the spring piece 203. The second limiting member 403 is directly disposed on the protrusion 406, and the second limiting member 403 is integrally formed with the protrusion 406 and the body part 405. This design can simplify the complexity of the mold, make it easier to process and manufacture, optimize the stress point of the spring piece 203, and improve the service life of the spring piece 203.

[0043] In some embodiments of this utility model, the spring sheet 203 is made of glass fiber composite material or carbon fiber composite material. Glass fiber itself has certain flexibility and fatigue resistance, good impact resistance and fracture toughness, and is not easily brittle, making it suitable for applications where the spring sheet 203 is used for repeated small deformations when the seat 100 bends. It is also low in cost and has high processing efficiency. Carbon fiber has extremely high specific strength and specific modulus. The spring sheet 203 made of carbon fiber composite material can achieve an extremely lightweight yet high-strength structure. However, carbon fiber composite material is expensive and difficult to process. Therefore, glass fiber composite material is preferred for the spring sheet 203.

[0044] refer to Figure 1 and Figure 2The seat 100 according to a second aspect embodiment of the present invention includes a chassis assembly 101 as described in any of the first aspect embodiments. The chassis assembly 101 of this embodiment simplifies its internal structure to a first housing 201, a second housing 202, and a single spring 203. This simplifies the overall structure and reduces the impact of deviations during installation of a single spring 203 compared to the combined deviations of multiple springs 203. It also avoids issues such as asymmetrical force distribution caused by multiple springs 203, effectively improving the reclining experience. Furthermore, the detachable single spring 203 simplifies installation and reduces the size of the chassis assembly 101 compared to traditional structures, thus reducing space requirements. The seat 100 using this chassis assembly 101 achieves improved reclining experience, simplified structure, and reduced overall size, meeting the requirements for lightweight design.

[0045] refer to Figure 1 and Figure 2 In some embodiments of this utility model, the seat 100 includes a backrest 103 and a leg 102. The backrest 103 is connected to the second housing 202, and the leg 102 is connected to the first housing 201. This seat 100 is a common office chair design. When the user leans against the backrest 103, the backrest 103 causes the second housing 202 to rotate backward, resulting in the seat 100 tilting back. The spring plate 203 also bends and deforms under stress. When the external force is removed, the rebound force of the spring plate 203 drives the second housing 202 and the backrest 103 to rotate forward, achieving a reset process. (Reference) Figure 1 In some embodiments of this utility model, the bottom end of the chair leg 102 is also equipped with a pulley, which allows the office chair to slide and improves the functionality of the office chair.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A chassis assembly, characterized in that, include: First shell; A second housing is rotatably connected to the first housing. The first housing and the second housing together define a receiving cavity, and a limit module is provided in the receiving cavity. A spring sheet is detachably disposed in the receiving cavity. The limiting module abuts against the spring sheet to restrict the sliding of the spring sheet relative to the first housing and the second housing. The spring sheet abuts against both the first housing and the second housing. When the second housing rotates backward relative to the first housing, the elastic force of the spring sheet is used to drive the second housing to rotate forward to reset.

2. The chassis assembly according to claim 1, characterized in that, The limiting module includes a first limiting member, a second limiting member, and a third limiting member. The spring sheet has a limiting hole. The first limiting member passes through the limiting hole. The outer peripheral surface of the first limiting member abuts against the inner peripheral wall of the limiting hole to restrict the radial movement of the spring sheet along the limiting hole. The second limiting member abuts against both sides of the spring sheet along the width direction to limit the movement of the spring sheet along the width direction. The third limiting member abuts against both sides of the spring sheet along the thickness direction, respectively, with the inner wall of the accommodating cavity.

3. The chassis assembly according to claim 2, characterized in that, The first limiting member and the second limiting member are respectively disposed at both ends of the spring sheet along the length direction.

4. The chassis assembly according to claim 3, characterized in that, The first limiting member is integrally formed with the first housing, and the second limiting member is integrally formed with the second housing.

5. The chassis assembly according to claim 2, characterized in that, The third limiting member has an abutment area for abutting the lower surface of the spring piece, and the abutment area is close to the front end of the spring piece along its length.

6. The chassis assembly according to claim 5, characterized in that, The minimum distance between the contact area and the foremost point of the spring is L1, and the length of the spring is L2, where 0.2L2≤L1≤0.5L2.

7. The chassis assembly according to claim 2, characterized in that, The second housing includes a body portion and a protrusion portion. The protrusion portion protrudes downward relative to the inner peripheral wall of the body portion and is used to abut against the upper surface of the spring piece so that the spring piece and the body portion are spaced apart.

8. The chassis assembly according to claim 1, characterized in that, The spring is made of glass fiber composite material or carbon fiber composite material.

9. A seat, characterized in that, Includes the chassis assembly as described in any one of claims 1 to 8.

10. The seat according to claim 9, characterized in that, The seat includes a backrest and legs, the backrest is connected to the second housing, and the legs are connected to the first housing.

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