Handrail camber adjusting mechanism and seat

Abstract

The utility model discloses a kind of armrest camber adjusting mechanism and seat, camber adjusting assembly and locking structure are set between armrest body and base, camber adjusting assembly includes respectively movable seat and fixed seat, fixed seat is equipped with the arc convex surface projecting upward, the shape of arc convex surface is the arch shape of middle high, low in front and back two ends;Movable seat is equipped with the arc concave surface matching with arc convex surface;Arc convex surface and arc concave surface mutually adhere and constitute camber guide structure;Locking structure includes control switch movably arranged on movable seat, multiple front and back interval engagement teeth being arranged on fixed seat, locking tooth for and corresponding engagement tooth clamping is correspondingly equipped on control switch;When movable seat moves, through camber guide structure, the front and back position and support angle of armrest body are adjusted in place simultaneously, so that armrest body can form more sufficient support to the arm of position change, apply it to seat, can satisfy the use demand of person sitting, improve the experience of sitting.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to an armrest arc adjustment mechanism and a seat. Background Technology

[0002] Most office chairs or ergonomic chairs have adjustable armrests on both sides of the seat. The armrests consist of an armrest support that is connected to the chair body and an armrest body that is mounted on the armrest support. The armrest body is usually movably connected to the armrest support to adjust its support position for the arms.

[0003] In some seats, the armrest body is slidably connected to the armrest bracket to provide sufficient support for the arms moving back and forth through its own sliding motion.

[0004] In some seats, the armrest body is rotatably connected to the armrest bracket to accommodate the changing angle and position of the arm. For example, the armrest patent with publication number CN223008748 is equipped with an armrest tilting mechanism to adjust the support angle of the armrest surface assembly. It includes a fixed seat and a rotating seat that can be linked with the armrest surface assembly. The rotating seat and the fixed seat are adjusted and locked in position through the cooperation of ratchet teeth and ratchet grooves, so that the armrest surface assembly can be tilted and rotated to a predetermined position and kept in place. This design can adapt to and provide sufficient support for the arm with changing angle and position.

[0005] However, the above two types of armrest mechanisms still have shortcomings. Specifically, the position of a sitter's arms does not change in a single way. For example, when the arm moves backward, the angle of the arm will also unconsciously and automatically tilt upward. The above armrest designs are difficult to provide good support for the arm when the angle and position of the arm change simultaneously.

[0006] Based on the above problems, an armrest adjustment mechanism needs to be designed so that when adjusting the position, the front-to-back position and the upward angle of the armrest body can be adjusted simultaneously to provide sufficient support for the arm after the position change and meet the user's needs. Summary of the Invention

[0007] This utility model provides an armrest arc surface adjustment mechanism and a seat. By setting an arc surface adjustment component and a locking structure between the armrest body and the base, the front and rear positions and support angles of the armrest body are simultaneously adjusted to the correct positions through the arc surface guide structure, so that the armrest body can provide more adequate support for the arm with changing position and meet the user's needs.

[0008] The technical solution of this utility model is implemented as follows: An armrest curvature adjustment mechanism, comprising: The base has a handrail body on top for supporting the hands; An arc-shaped adjustment component is disposed between the base and the armrest body. The arc-shaped adjustment component includes a movable seat and a fixed seat respectively disposed at the lower end of the armrest body and the upper end of the base. The fixed seat is provided with an upwardly protruding arc-shaped convex surface, which is arched with a high middle and low front and rear ends. The movable seat is provided with an arc-shaped concave surface that matches the arc-shaped convex surface. The arc-shaped convex surface and the arc-shaped concave surface fit together to form an arc-shaped guide structure. The locking structure includes a control switch movably mounted on the movable seat and a plurality of locking teeth spaced apart on the fixed seat. The control switch is provided with corresponding locking teeth for engaging with the corresponding locking teeth. The handrail body has a locked state and an adjustable state. When the handrail body is in the adjustable state, the locking teeth and the engaging teeth are separated, and the movable seat can slide back and forth to the predetermined position under the guidance of the arc-shaped guide structure, while simultaneously adjusting the back and forth position and support angle of the handrail body to the correct position. When the handrail body is switched to the locked state, the locking teeth can engage with the corresponding engaging teeth to keep the adjusted handrail body fixed.

[0009] Preferably, the locking structure is disposed between the arc-shaped convex surface and the arc-shaped concave surface; the multiple engaging teeth are protruding from the arc-shaped convex surface, the movable seat is a shell-like structure with an opening, the control switch is inserted into the shell through the opening and rotatedly connected to the shell, the arc-shaped concave surface has a through groove communicating with the interior of the shell-like structure, when the handrail body is switched to the locked state, the locking teeth pass through the through groove and engage with the engaging teeth on the arc-shaped convex surface, so that the handrail body is kept fixed; thus, the locking structure is hidden between the arc-shaped concave surface and the arc-shaped convex surface.

[0010] Preferably, the area corresponding to the position of multiple engaging teeth on the arc-shaped concave surface is recessed and forms a relief groove, and the through groove is set at the bottom of the relief groove; when the locking tooth engages with the corresponding engaging tooth, the relief groove avoids the engaging tooth, so that the arc-shaped convex surface is in close contact with the arc-shaped concave surface; to prevent the protruding engaging tooth from affecting the tightness of the fit between the arc-shaped concave surface and the arc-shaped convex surface.

[0011] Preferably, it also includes an elastic element acting on the control switch, the elastic element causing the locking teeth of the control switch to always tend to engage with the engaging teeth; thus keeping the handrail body locked when adjusted to the correct position.

[0012] Preferably, the rotation range of the control switch is limited to within the opening; this prevents the control switch from rotating too much.

[0013] Preferably, a limiting structure is provided between the fixed seat and the movable seat, and the limiting structure is configured to restrict the separation of the arc-shaped concave surface and the arc-shaped convex surface.

[0014] Preferably, the fixed seat is a housing with a through-hole groove on the arc-shaped convex surface that communicates with the interior of the housing. The bottom end of the movable seat has a connecting part that matches the width of the groove. The connecting part passes through the groove and is fixed to a limiting member inside the housing. The width of the limiting member is greater than the width of the connecting part. The upper wall of the limiting member housing has an arc-shaped surface. The limiting member fits against the arc-shaped surface so that when the movable seat moves, the arc-shaped concave surface and the arc-shaped convex surface are tightly attached and do not separate.

[0015] Preferably, the armrest body and the curved surface adjustment component constitute a curved surface adjustment module, and the fixing seat in the curved surface adjustment module is detachably connected to the base; this reduces assembly time and facilitates assembly.

[0016] Preferably, the mounting bracket is connected to the base by screws.

[0017] A seat, including the aforementioned armrest curvature adjustment mechanism.

[0018] The beneficial effects of this utility model, which adopts the above technical solution, are as follows: This invention features an arc-shaped guide structure consisting of an arc-shaped concave surface and an arc-shaped convex surface between the fixed seat and the movable seat. This structure allows the armrest to change its position and support angle simultaneously as the movable seat moves back and forth, better conforming to the human arm's movement habits. It provides ample support for the arm as its angle and position change simultaneously, meeting the user's needs and enhancing the seating experience.

[0019] The locking structure is positioned between the concave and convex surfaces, keeping both the locking teeth and the engaging teeth hidden, resulting in a more harmonious appearance. At the same time, the design of the clearance groove provides space for the protruding engaging teeth, ensuring that the engaging teeth do not affect the tightness of the fit between the concave and convex surfaces while engaging with the locking teeth. This ingenious design achieves multiple benefits.

[0020] The armrest body, the arc-shaped adjustment component, and the locking structure can be pre-assembled into an arc-shaped adjustment module. When assembling with the seat, the fixing seat can be connected to the base, and the arc-shaped adjustment module can be directly installed on the base, reducing the complexity of assembly and saving assembly time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the armrest's curved surface adjustment mechanism; Figure 2 This is a sectional view of the armrest's curved surface adjustment mechanism; Figure 3 Exploded view of the armrest curved surface adjustment mechanism; Figure 4 This is an exploded view of the armrest's curved adjustment mechanism from another angle; Figure 5 An exploded view of the armrest curved surface adjustment module; Figure 6 This is an exploded view of the armrest curved surface adjustment module from another angle; Figure 7 This is a schematic diagram showing the detachable connection between the mounting bracket and the base. Figure 8 This is a schematic diagram showing how the front-to-back position and angle of the armrest body change simultaneously when the movable seat moves backward; The attached figures are labeled as follows: 1-base, 2-armrest body, 3-movable seat, 3a-movable seat shell, 3b-cover, 31-arc concave surface, 32-through groove, 33-connecting part, 34-shaft hole, 35-avoiding groove, 36-opening, 4-fixed seat, 4a-fixed seat shell, 4b-cover plate, 41-arc convex surface, 42-strip groove, 43-limiting component, 5-control switch, 51-locking tooth, 52-engaging tooth, 53-rotating shaft, A-armrest arc surface adjustment module. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0024] The specific embodiments of this utility model are as follows: like Figure 1-8 As shown, this embodiment provides an armrest curvature adjustment mechanism, including: The base 1 has an armrest body 2 for supporting the hands on top of it; the lower end of the base 1 is connected to an armrest support rod, which is usually fastened to both sides of the seat by a threaded connection. An arc-shaped adjustment component is disposed between the base 1 and the armrest body 2. The component includes a movable seat 3 and a fixed seat 4, respectively disposed at the lower end of the armrest body 2 and the upper end of the base 1. The movable seat 3 and the armrest body 2 can be fixedly connected or rotatably connected, allowing the armrest body 2 to rotate horizontally and adjust its support position. The fixed seat 4 has an upwardly protruding arc-shaped convex surface 41, which is arched with a high center and low front and rear ends. The movable seat 3 has an arc-shaped concave surface 31 that matches the arc-shaped convex surface 41. The arc-shaped convex surface 41 and the arc-shaped concave surface 31 fit together to form an arc-shaped guide structure. Figure 8As shown, when the movable seat 3 moves back and forth, the arc-shaped concave surface 31 slides relative to the arc-shaped convex surface 41. Due to the arched design of the arc-shaped convex surface 41, the movement trajectory of the armrest body 2 connected to the movable seat 3 is also roughly arc-shaped. Therefore, when the armrest body 2 moves back and forth, its front and rear support positions and tilting angle relative to the initial position will change, which is more in line with the human arm movement habits and can provide more support for the arm, thus improving comfort. A locking structure, disposed between the movable seat 3 and the fixed seat 4, includes a control switch 5 movably mounted on the movable seat 3 and multiple engagement teeth 52 spaced apart on the fixed seat 4. The control switch 5 is provided with corresponding locking teeth 51 for engaging with the corresponding engagement teeth 52. The movement of the control switch 5 can engage or disengage the locking teeth 51 with the engagement teeth 52. The handrail body 2 has a locked state and an adjustable state to adapt to changes in arm position. When the handrail body 2 is in the adjustable state, the locking tooth 51 separates from the engaging tooth 52, and the movable seat 3 can slide back and forth to the predetermined position under the guidance of the arc-shaped guide structure, while simultaneously adjusting the back and forth position and support angle of the handrail body 2 to the correct position. When the handrail body 2 switches to the locked state, the locking tooth 51 can engage with the corresponding engaging tooth 52, keeping the adjusted handrail body 2 fixed and providing sufficient support for the arm.

[0025] Furthermore, such as Figure 2-4 As shown, the locking teeth 51 and engaging teeth 52 in the locking structure are both protruding tooth-like structures. To reduce the impact of the tooth-like structures on the appearance of the seat, the locking structure in this embodiment is located between the arc-shaped convex surface 41 and the arc-shaped concave surface 31. The multiple engaging teeth 52 are protruding on the arc-shaped convex surface 41. To facilitate the installation of the control switch 5, the movable seat 3 is a shell-like structure with an opening 36. The control switch 5 is inserted into the shell through the opening 36 and rotatably connected to the shell. The uninserted part of the control switch 5 is exposed on the movable seat 3 and forms a wrench for easy manual operation. Specifically, the movable seat 3 includes a movable seat shell 3. a. The bottom surface of the movable base shell 3a is the aforementioned arc-shaped concave surface 31; the upper end of the movable base shell 3a is open, and a cover 3b is provided at the open position; a support base is provided inside the movable base shell 3a, and a shaft hole 34 is provided on the support base. A rotating shaft 53 is correspondingly provided on the control switch 5 and inserted into the shaft hole 34. A through groove 32 communicating with the inside of the shell structure is provided on the arc-shaped concave surface 31. When the armrest body 2 is switched to the locked state, the locking tooth 51 passes through the through groove 32 and engages with the engaging tooth 52 on the arc-shaped convex surface 41, so that the armrest body 2 is fixed; when it is necessary to unlock, the wrench is moved to make the locking tooth 51 exit the through groove 32 and separate from the engaging tooth 52.

[0026] Furthermore, the protruding tooth-like structure occupies a certain space between the arc-shaped concave surface 31 and the arc-shaped convex surface 41. Therefore, the protruding tooth-like structure can easily create gaps between the arc-shaped concave surface 31 and the arc-shaped convex surface 41, affecting the tightness of the fit and also affecting the trajectory guidance of the handrail body 2. Therefore, in this embodiment, the area on the arc-shaped concave surface 31 corresponding to the positions of multiple engaging teeth 52 is recessed and forms a relief groove 35. The through groove 32 is provided through the bottom of the relief groove 35. When the locking tooth 51 engages with the corresponding engaging tooth 52, the relief groove 35 avoids the engaging tooth 52, which is equivalent to leaving a space for the protruding tooth-like structure, so that the arc-shaped convex surface 41 is tightly attached to the arc-shaped concave surface 31. This prevents the protruding engaging tooth 52 from affecting the tightness of the fit between the arc-shaped concave surface 31 and the arc-shaped convex surface 41.

[0027] Furthermore, in order to keep the adjusted handrail body 2 fixed in the front-back direction, the locking structure also includes an elastic element (not shown) acting on the control switch 5. The elastic element makes the locking tooth 51 of the control switch 5 always tend to engage with the engagement tooth 52, so that the adjusted handrail body 2 is locked. The elastic element can be a torsion spring, compression spring, spring sheet or other elastic component that can apply elastic force between the rotating shaft 53 and the support base.

[0028] Furthermore, such as Figure 2 As shown, in this embodiment, the front end of the movable housing 3a and the front end of the cover 3b together form the opening 36. The upper and lower end faces of the opening 36 are located on the upper and lower sides of the control switch 5, respectively, so that the rotation range of the control switch 5 is limited within the opening 36; thereby limiting the rotation range of the control switch 5 and preventing the rotation angle of the control switch 5 from being too large.

[0029] Furthermore, such as Figure 4-6As shown, the concave surface 31 and the convex surface 41 need to remain stable and not separate after being fitted together so that the armrest body 2 can support the arm. Therefore, a limiting structure is provided between the fixed seat 4 and the movable seat 3. The limiting structure is configured to prevent the concave surface 31 and the convex surface 41 from separating. Specifically, the fixed seat 4 is a shell, including a fixed seat shell 4a. The upper end of the fixed seat shell 4a is open, and a cover plate 4b is installed at the open end. The upper end surface of the cover plate 4b is the aforementioned convex surface 41. A strip groove 42 communicating with the interior of the shell is provided through the convex surface 41. The bottom end of the movable seat 3 is provided with a connecting part 33 that matches the width of the strip groove 42. The connecting part 33 passes through the strip groove 42 and is fixed to the limiting member 43 inside the housing. The width of the limiting member 43 is greater than the width of the connecting part 33, so that the cross-sectional shape formed by the movable seat 3, the connecting part 33, and the limiting member is approximately I-shaped. This restricts the armrest body 2 and the movable seat 3 from detaching upward from the fixed seat 4, so that when the movable seat 3 moves, the arc-shaped concave surface 31 and the arc-shaped convex surface 41 are tightly attached and do not separate. At the same time, since the movement trajectory of the movable seat 3 is arc-shaped, in order to match the trajectory, the upper wall surface inside the housing is provided with an arc-shaped surface, which is located at the bottom end of the cover plate 4b. The limiting member fits against the arc-shaped surface to limit the movement of the movable seat 3 along the arc-shaped trajectory.

[0030] Furthermore, such as Figure 7 As shown, for ease of assembly, the armrest body 2 and the arc adjustment component in this embodiment constitute an arc adjustment module. The fixed seat 4 in the arc adjustment module is detachably connected to the base 1. Detachable connection usually refers to screw connection. In actual assembly, it is only necessary to fix the fixed seat 4 to the base 1 to give the seat the arc adjustment function of the armrest, which can effectively reduce assembly time and facilitate assembly.

[0031] Furthermore, a seat is provided, including the aforementioned armrest arc adjustment mechanism and a seat body. The armrest arc adjustment mechanism is symmetrically arranged on both sides of the seat body to provide sufficient support for both arms.

[0032] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A handrail arc surface adjustment mechanism, characterized in that, include: A base (1) is provided above the base (1) for supporting the hands (2); The arc surface adjustment component is set between the base (1) and the armrest body (2). The arc surface adjustment component includes a movable seat (3) and a fixed seat (4) respectively set at the lower end of the armrest body (2) and the upper end of the base (1). The fixed seat (4) is provided with an upwardly protruding arc-shaped convex surface (41). The arc-shaped convex surface (41) is an arch shape with a high middle and low front and rear ends. The movable seat (3) is provided with an arc-shaped concave surface (31) that matches the arc-shaped convex surface (41). The arc-shaped convex surface (41) and the arc-shaped concave surface (31) fit together to form an arc-shaped guide structure. The locking structure includes a control switch (5) movably mounted on the movable seat (3) and a plurality of locking teeth (52) spaced apart on the fixed seat (4). The control switch (5) is provided with a corresponding locking tooth (51) for engaging with the corresponding locking tooth (52). The handrail body (2) has a locked state and an adjustable state. When the handrail body (2) is in the adjustable state, the locking tooth (51) and the engaging tooth (52) are separated. The movable seat (3) can slide back and forth to the predetermined position under the guidance of the arc-shaped guide structure, and at the same time adjust the front and back position and support angle of the handrail body (2) to the correct position. When the handrail body (2) is switched to the locked state, the locking tooth (51) can engage with the corresponding engaging tooth (52) to keep the adjusted handrail body (2) fixed.

2. The armrest arc surface adjustment mechanism according to claim 1, characterized in that: The locking structure is located between the arc-shaped convex surface (41) and the arc-shaped concave surface (31); the multiple engaging teeth (52) are protruding on the arc-shaped convex surface (41), the movable seat (3) is a shell-shaped structure, the shell-shaped structure is provided with an opening (36), the control switch (5) is inserted into the shell through the opening (36) and rotatedly connected to the shell, the arc-shaped concave surface (31) is provided with a through groove (32) communicating with the inside of the shell-shaped structure, when the handrail body (2) is switched to the locked state, the locking teeth (51) pass through the through groove (32) and engage with the engaging teeth (52) on the arc-shaped convex surface (41) to keep the handrail body (2) fixed.

3. The armrest arc surface adjustment mechanism according to claim 2, characterized in that: The area corresponding to the position of multiple engaging teeth (52) on the arc-shaped concave surface (31) is recessed and forms a relief groove (35). The through groove (32) is set at the bottom of the relief groove (35). When the locking tooth (51) engages with the corresponding engaging tooth (52), the relief groove (35) avoids the engaging tooth (52) so that the arc-shaped convex surface (41) is in close contact with the arc-shaped concave surface (31).

4. The armrest arc surface adjustment mechanism according to claim 1, characterized in that: It also includes an elastic element acting on the control switch (5), which makes the locking tooth (51) of the control switch (5) always tend to engage with the engagement tooth (52).

5. The armrest arc surface adjustment mechanism according to claim 2, characterized in that: The rotation range of the control switch (5) is limited within the opening (36).

6. The armrest arc surface adjustment mechanism according to claim 1, characterized in that: A limiting structure is provided between the fixed seat (4) and the movable seat (3), and the limiting structure is configured to restrict the separation of the arc concave surface (31) and the arc convex surface (41).

7. The armrest arc surface adjustment mechanism according to claim 1, characterized in that: The fixed seat (4) is a shell with a through groove (42) that communicates with the inside of the shell on the arc-shaped convex surface (41). The bottom end of the movable seat (3) is provided with a connecting part (33) that matches the width of the groove (42). The connecting part (33) passes through the groove (42) and is fixed to the limiting member (43) inside the shell. The width of the limiting member (43) is greater than the width of the connecting part (33). The upper wall inside the shell is provided with an arc-shaped surface. The limiting member (43) fits against the arc-shaped surface so that when the movable seat (3) moves, the arc-shaped concave surface (31) and the arc-shaped convex surface (41) are tightly attached and do not separate.

8. The armrest arc surface adjustment mechanism according to claim 1, characterized in that: The armrest body (2) and the arc surface adjustment component constitute the arc surface adjustment module. The fixed seat (4) in the arc surface adjustment module is detachably connected to the base (1).

9. The armrest arc surface adjustment mechanism according to claim 8, characterized in that: The mounting bracket (4) is connected to the base (1) by screws.

10. A type of seat, characterized in that: Includes the armrest arc surface adjustment mechanism as described in claim 1.

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