A seat with a backrest that can be turned

Abstract

The utility model relates to the field of furniture, disclose a backrest rotatable seat, include: support, backrest body is along left and right direction and is provided with left connecting portion and right connecting portion, the left connecting portion with left side between the support is equipped with left connecting axle, there is damper between left connecting axle with left connecting portion, right connecting portion with right side between the support is equipped with right connecting axle, right connecting axle with right connecting portion is provided with torsional spring, left connecting axle with right connecting axle is located on same straight line, the support can rotate around left connecting axle, torsional spring has the tendency of rotating backrest body to the stroke end, the utility model discloses the installation mode of respectively inserting left connecting axle, right connecting axle between backrest body and support left and right sides, can realize the quick installation to backrest body, and the whole structure is compact, backrest body rotates more gently, improve the comfort of overall use.

Description

Technical Field

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

[0002] A chair includes a seat and a backrest located behind the seat. To improve comfort, some backrests are designed to rotate on the seat. When a user leans back against the backrest, it rotates backward. Currently, there are various methods for installing backrests. For example, one method involves mounting the backrest to the seat using bearings and then placing a tension spring between the backrest and the seat, allowing the backrest to rotate forward elastically. However, this method requires embedding the bearings between the backrest and the seat during installation, which is cumbersome. Furthermore, the tension spring and other structures occupy considerable space and are exposed, affecting the overall appearance. Therefore, there is an urgent need for a chair with a simpler structure and easier installation, featuring a rotating backrest. Utility Model Content

[0003] The purpose of this utility model is to provide a seat with a rotatable backrest to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] A rotatable backrest seat according to a first aspect of the present invention includes: a support frame; a backrest body having a left connecting portion and a right connecting portion arranged in a left-right direction, a left connecting shaft passing through the left connecting portion and the left side of the support frame, a damper between the left connecting shaft and the left connecting portion, a right connecting shaft passing through the right connecting portion and the right side of the support frame, a torsion spring being arranged between the right connecting shaft and the right connecting portion, the left connecting shaft and the right connecting shaft being located on the same straight line, the support frame being rotatable around the left connecting shaft, and the torsion spring having a tendency to rotate the backrest body forward to the end of its travel.

[0005] This technical solution has at least the following beneficial effects: The backrest body is mounted on the bracket. Specifically, the left and right connecting parts formed on the left and right sides of the backrest body are brought close to the bracket. The damper and the left connecting shaft can be directly pre-installed on the left connecting part. Similarly, the torsion spring and the right connecting shaft can be directly pre-installed on the right connecting part. At this time, the left and right connecting shafts are directly inserted into the left and right sides of the bracket respectively, thus achieving a quick installation connection between the backrest body and the bracket. After installation, the backrest body can rotate around the line containing the left and right connecting shafts. The torsion spring provides a spring force for the backrest body to rotate forward and return to its original position. Due to the volume of the torsion spring... Smaller in size and mounted on the right connecting part and the left connecting shaft around which the right connecting part rotates, it reduces the space required and makes the overall structure more compact. A damper is set between the left connecting shaft and the left connecting part on the left side of the backrest body. The damper can reduce the instantaneous rotation speed of the backrest body. In particular, when the torsion spring drives the backrest body to rotate forward and reset, it can make the rotation of the backrest body more stable. In this way, by inserting the left connecting shaft and the right connecting shaft on the left and right sides of the backrest body and the bracket respectively, the backrest body can be quickly installed. The overall structure is compact and the rotation of the backrest body is smoother, improving the overall comfort of use.

[0006] According to some embodiments of the present invention, the bracket is provided with a left support portion, the left connecting shaft passes through the left connecting portion and is inserted into the left support portion, and a left connecting member is provided on the right side of the left support portion, the left connecting member being connected to the left connecting shaft.

[0007] According to some embodiments of the present invention, a left connecting cover is detachably connected to the left side of the left connecting portion.

[0008] According to some embodiments of the present invention, a left fixing sleeve is sleeved on the outer side of the left connecting shaft, and a left rotating ring is provided inside the left connecting part, with the left rotating ring sleeved on the outer side of the left fixing sleeve.

[0009] According to some embodiments of the present invention, the left-turning ring is provided with a left arc-shaped hole, the left arc-shaped hole extends around the left connecting shaft, and the left support portion has a left limiting block extending into the left arc-shaped hole.

[0010] According to some embodiments of the present invention, the bracket is provided with a right support portion, the right connecting shaft passes through the right connecting portion and is inserted into the right support portion, a right connecting member is provided on the left side of the right support portion, and the right connecting member is connected to the right connecting shaft.

[0011] According to some embodiments of the present invention, a right connecting cover is detachably connected to the right side of the right support portion.

[0012] According to some embodiments of the present invention, a right fixing sleeve is sleeved on the outside of the right connecting shaft, and a right rotating ring is provided inside the right connecting part, with the right rotating ring sleeved on the outside of the right fixing sleeve.

[0013] According to some embodiments of the present invention, the right rotating ring is provided with a right arc-shaped hole, the right arc-shaped hole extends around the right connecting shaft, and the right support portion has a right limiting block extending into the right arc-shaped hole.

[0014] According to some embodiments of the present invention, one arm of the torsion spring is inserted into the right connecting shaft along the radial direction of the right connecting shaft, a positioning hole is provided on the right side of the right rotating ring, and the other arm of the torsion spring is inserted into the positioning hole.

[0015] 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

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional view of the entire utility model.

[0018] Figure 2 This is the first exploded view of the backrest body of this utility model.

[0019] Figure 3 This is the second exploded view of the backrest body of this utility model.

[0020] In the attached diagram: 100-bracket, 110-left support, 120-right support, 200-backrest body, 210-left connecting part, 211-damper, 212-left connecting shaft, 213-left connecting cover, 214-left fixing sleeve, 215-left swivel ring, 216-left arc-shaped hole, 220-right connecting part, 221-torsion spring, 222-right connecting shaft, 223-right connecting cover, 224-right fixing sleeve, 225-right swivel ring, 226-right arc-shaped hole, 227-positioning hole. Detailed Implementation

[0021] The embodiments of this application 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 application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0023] In the description of this application, "several" means one or more, "more than" 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.

[0024] In the description of this application, unless otherwise expressly defined, terms such as "setup," "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 application in conjunction with the specific content of the technical solution.

[0025] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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.

[0027] Reference Figures 1 to 3 According to a first aspect of the present invention, a seat with a rotatable backrest includes a support 100 and a backrest body 200. The backrest body 200 has a left connecting portion 210 and a right connecting portion 220 arranged in a left-right direction. A left connecting shaft 212 passes through the left connecting portion 210 and the left side of the support 100, and a damper 211 is provided between the left connecting shaft 212 and the left connecting portion 210. A right connecting shaft 222 passes through the right connecting portion 220 and the right side of the support 100. The right connecting shaft 222 and the right connecting portion 210... A torsion spring 221 is provided between the two ends of the support 20. The left connecting shaft 212 and the right connecting shaft 222 are on the same straight line. The bracket 100 can rotate around the left connecting shaft 212. The torsion spring 221 has the tendency to rotate the backrest body 200 forward to the end of its stroke. When in use, the user leans back against the backrest body 200. The torsion spring 221 can make the backrest body 200 have an elastic forward support force. When the user removes the pressure on the backrest body 200, the torsion spring 221 can drive the backrest body 200 to rotate forward and return to its original position.

[0028] As described above, the backrest body 200 is mounted on the bracket 100. Specifically, the left connecting portion 210 and the right connecting portion 220 formed on the left and right sides of the backrest body 200 are brought close to the bracket 100. The damper 211 and the left connecting shaft 212 can be directly pre-installed on the left connecting portion 210. Similarly, the torsion spring 221 and the right connecting shaft 222 can be directly pre-installed on the right connecting portion 220. At this time, the left connecting shaft 212 and the right connecting shaft 222 are directly inserted into the left and right sides of the bracket 100 respectively, thus achieving a quick installation connection between the backrest body 200 and the bracket 100. After installation, the backrest body 200 can rotate around the line where the left connecting shaft 212 and the right connecting shaft 222 are located. The torsion spring 221 provides a spring force for the backrest body 200 to rotate forward and return to its original position. Due to the torsion spring 221... With its smaller size and installation on the right connecting part 220 and the left connecting shaft 212 around which the right connecting part 220 rotates, the space occupied is reduced, and the overall structure is more compact. A damper 211 is provided between the left connecting shaft 212 and the left connecting part 210 on the left side of the backrest body 200. The damper 211 can reduce the instantaneous rotation speed of the backrest body 200. In particular, when the torsion spring 221 drives the backrest body 200 to rotate forward and reset, the rotation of the backrest body 200 is more stable. In this way, by inserting the left connecting shaft 212 and the right connecting shaft 222 through the left and right sides of the backrest body 200 and the bracket 100 respectively, the backrest body 200 can be quickly installed. The overall structure is compact, the rotation of the backrest body 200 is smoother, and the overall comfort of use is improved.

[0029] In a specific embodiment where the left connecting shaft 212 passes through the left connecting part 210 and the left side of the bracket 100, the bracket 100 is provided with a left support part 110, the left connecting shaft 212 passes through the left connecting part 210 and is inserted into the left support part 110, and a left connector passes through the right side of the left support part 110. The left connector is connected to the left connecting shaft 212. In practical applications, the left connector can be a screw, a locking post or other connecting structure. A left support portion 110 is formed on the bracket 100 for connecting with the left connecting portion 210. During installation, the left connecting portion 210 is brought close to the left side of the left support portion 110, and the left connecting shaft 212 is passed through the left connecting portion 210 to the right and inserted into the left support portion 110. A left connector is then passed through the right side of the left support portion 110. The left connecting shaft 212 is tightened and fixed to the left support portion 110 by connecting the left connector with the left connecting shaft 212. This makes the left connecting shaft 212 form a stable connection point in the left support portion 110 in the left-right direction, improving the structural stability of the left connecting shaft 212 in supporting and connecting the backrest body 200.

[0030] To reduce the exposure of the connecting structure of the left connecting part 210 and improve the overall appearance, in this embodiment, a left connecting cover 213 is detachably connected to the left side of the left connecting part 210. In practical applications, the left connecting cover 213 can be connected by a snap-fit ​​or screw. For example, after the left connecting cover 213 is pressed against the left side of the left connecting part 210, a screw is driven in from the right side of the left connecting part 210 and connected to the left connecting cover 213, thereby tightening and fixing the left connecting cover 213. The left connecting cover 213 can shield and protect the damper 211 and other structures installed inside the left connecting part 210, preventing external objects from directly impacting and damaging the damper 211, and improving the overall appearance.

[0031] To improve the structural stability of the left connecting part 210 rotating around the left connecting shaft 212, in this embodiment, a left fixing sleeve 214 is sleeved on the outside of the left connecting shaft 212, and a left rotating ring 215 is provided inside the left connecting part 210, which is sleeved on the outside of the left fixing sleeve 214. The rotational engagement between the left rotating ring 215 and the left fixing sleeve 214 improves the radial limiting of the left connecting part 210 and the left connecting shaft 212, reduces the stress on the damper 211, and thus improves the rotational stability of the left connecting part 210.

[0032] The backrest body 200 has a certain travel limit when rotating back and forth to prevent excessive rotation. Specifically, the left rotating ring 215 is provided with a left arc-shaped hole 216, which extends around the left connecting shaft 212. The left support part 110 has a left limiting block that extends into the left arc-shaped hole 216. When the backrest body 200 rotates back and forth around the left connecting shaft 212, it can drive the left limiting block to move within the left arc-shaped hole 216. When the left limiting block abuts against the left rotating ring 215 at both ends of the left arc-shaped hole 216, it can limit the further movement of the left limiting block. At this time, the backrest body 200 reaches the end position of the rotation travel, thus realizing the rotation limit of the backrest body 200.

[0033] Similarly, in a specific embodiment where the right connecting shaft 222 passes through the right connecting portion 220 and the right side of the bracket 100, the bracket 100 is provided with a right support portion 120. The right connecting shaft 222 passes through the right connecting portion 220 and is inserted into the right support portion 120. A right connecting member passes through the left side of the right support portion 120 and is connected to the right connecting shaft 222. In practical applications, the right connecting member can be a screw, a retaining post, or other connecting structure. A right support portion 120 is formed on the bracket 100 for connecting with the right connecting portion 220. During installation, the right connecting portion 220 is brought close to the right side of the right support portion 120, and the right connecting shaft 222 is passed through the right connecting portion 220 to the left and inserted into the right support portion 120. A right connector is then passed through the left side of the right support portion 120. The right connecting shaft 222 is tightened and fixed to the right support portion 120 by connecting the right connector with the right connecting shaft 222. This makes the right connecting shaft 222 form a stable connection point on the right support portion 120 in the left and right direction, improving the structural stability of the right connecting shaft 222 in supporting and connecting the backrest body 200.

[0034] In practical applications, the seat can be positioned between the left support 110 and the right support 120, resulting in a more compact overall structure.

[0035] To reduce the exposure of the connecting structure of the right connecting part 220 and improve the overall appearance, in this embodiment, a right connecting cover 223 is detachably connected to the right side of the right support part 120. In practical applications, the right connecting cover 223 can be connected by a snap-fit ​​or screw. For example, after the right connecting cover 223 is pressed against the right side of the right connecting part 220, a screw is driven into the left side of the right connecting part 220 and connected to the right connecting cover 223, thereby tightening and fixing the right connecting cover 223. The right connecting cover 223 can shield and protect the torsion spring 221 and other structures installed inside the right connecting part 220, preventing foreign objects from directly impacting and damaging the torsion spring 221, and improving the overall appearance.

[0036] To improve the structural stability of the right connecting part 220 rotating around the right connecting shaft 222, in this embodiment, a right fixing sleeve 224 is sleeved on the outside of the right connecting shaft 222, and a right rotating ring 225 is provided inside the right connecting part 220, which is sleeved on the outside of the right fixing sleeve 224. The rotational engagement between the right rotating ring 225 and the right fixing sleeve 224 improves the radial limiting of the right connecting part 220 and the right connecting shaft 222, reduces the stress on the damper 211, and thus improves the rotational stability of the right connecting part 220.

[0037] The backrest body 200 has a certain travel limit when rotating back and forth to prevent excessive rotation. Specifically, the right rotating ring 225 is provided with a right arc-shaped hole 226, which extends around the right connecting shaft 222. The right support part 120 has a right limiting block that extends into the right arc-shaped hole 226. When the backrest body 200 rotates back and forth around the right connecting shaft 222, it can drive the right limiting block to move within the right arc-shaped hole 226. When the right limiting block abuts against the right rotating ring 225 at both ends of the right arc-shaped hole 226, it can limit the further movement of the right limiting block. At this time, the backrest body 200 reaches the end position of the rotation travel, thus realizing the rotation limit of the backrest body 200.

[0038] A torsion spring 221 is connected between the right connecting part 220 and the right connecting shaft 222. In this embodiment, one arm of the torsion spring 221 is inserted into the right connecting shaft 222 radially. A positioning hole 227 is provided on the right side of the right rotating ring 225, and the other arm of the torsion spring 221 is inserted into the positioning hole 227. When installing the torsion spring 221, the torsion spring 221 is sleeved on the outside of the right connecting shaft 222, which allows for quick pre-positioning of the torsion spring 221. One arm of the torsion spring 221 is inserted into the positioning hole 227 to fix one end of the torsion spring 221, while the other arm of the torsion spring 221 is inserted into the positioning hole 227 on the right side of the right rotating ring 225. In this way, the torsion spring 221 can be quickly connected between the right connecting shaft 222 and the right connecting part 220, and the torsion spring 221 can be stably torsioned when the right connecting part 220 rotates relative to the right connecting shaft 222.

[0039] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A seat with a rotatable backrest, characterized in that: include: Bracket (100); The backrest body (200) has a left connecting part (210) and a right connecting part (220) arranged in the left-right direction. A left connecting shaft (212) is passed between the left connecting part (210) and the left side of the bracket (100). A damper (211) is between the left connecting shaft (212) and the left connecting part (210). A right connecting shaft (222) is passed between the right connecting part (220) and the right side of the bracket (100). A torsion spring (221) is arranged between the right connecting shaft (222) and the right connecting part (220). The left connecting shaft (212) and the right connecting shaft (222) are located on the same straight line. The bracket (100) can rotate around the left connecting shaft (212). The torsion spring (221) has a tendency to rotate the backrest body (200) forward to the end of its stroke.

2. A seat with a rotatable backrest according to claim 1, characterized in that: The bracket (100) is provided with a left support part (110), the left connecting shaft (212) passes through the left connecting part (210) and is inserted into the left support part (110), and a left connector is provided on the right side of the left support part (110), the left connector being connected to the left connecting shaft (212).

3. A seat with a rotatable backrest according to claim 2, characterized in that: The left connecting part (210) is detachably connected to a left connecting cover (213) on the left side.

4. A seat with a rotatable backrest according to claim 2, characterized in that: A left fixing sleeve (214) is fitted on the outside of the left connecting shaft (212), and a left rotating ring (215) is provided inside the left connecting part (210). The left rotating ring (215) is fitted on the outside of the left fixing sleeve (214).

5. A seat with a rotatable backrest according to claim 4, characterized in that: The left-turning ring (215) is provided with a left arc-shaped hole (216), which extends around the left connecting shaft (212), and the left support (110) has a left limiting block that extends into the left arc-shaped hole (216).

6. A seat with a rotatable backrest according to claim 1, characterized in that: The bracket (100) is provided with a right support part (120), the right connecting shaft (222) passes through the right connecting part (220) and is inserted into the right support part (120), and a right connector is provided on the left side of the right support part (120), the right connector being connected to the right connecting shaft (222).

7. A seat with a rotatable backrest according to claim 6, characterized in that: The right support (120) is detachably connected to a right connecting cover (223) on its right side.

8. A seat with a rotatable backrest according to claim 6, characterized in that: A right fixing sleeve (224) is sleeved on the outside of the right connecting shaft (222), and a right rotating ring (225) is provided inside the right connecting part (220). The right rotating ring (225) is sleeved on the outside of the right fixing sleeve (224).

9. A seat with a rotatable backrest according to claim 8, characterized in that: The right rotating ring (225) is provided with a right arc-shaped hole (226), which extends around the right connecting shaft (222), and the right support part (120) has a right limiting block that extends into the right arc-shaped hole (226).

10. A seat with a rotatable backrest according to claim 8, characterized in that: One arm of the torsion spring (221) is inserted into the right connecting shaft (222) radially. A positioning hole (227) is provided on the right side of the right rotating ring (225), and the other arm of the torsion spring (221) is inserted into the positioning hole (227).

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