Handrail turnover adjusting mechanism and seat

Abstract

The utility model discloses a handrail turnover adjusting mechanism and seat, including handrail support and handrail body, handrail support, handrail body are connected with fixed seat and rotating seat respectively, and rotating seat is rotatably connected on fixed seat through the pivot, makes handrail body can turn over up and down, be equipped with locking control assembly between fixed seat and rotating seat, and locking control assembly includes the fixed tooth piece that sets up between fixed seat and rotating seat, and the clamping piece that is connected with control switch, and the operator can according to own need, through control switch to control the gear tooth groove interlocking or separation of clamping piece and fixed tooth piece, and the whole mechanism's component is few, and simple structure, and the manufacturing cost is also lower, and the operator also does not have to carry out the back operation when adjusting the angle position of handrail body, and the use experience of handrail is improved.

Description

Technical Field

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

[0002] In most office chairs or ergonomic chairs, there are adjustable armrests on both sides of the seat. The armrest mechanism includes an armrest support connected to the chair body and an armrest body set on the armrest support. The armrest body can usually be flipped up and down and held in a predetermined position to support the sitter's arms as the angle and position change.

[0003] For example, in the handrail assembly patent with publication number CN120514218, a ratchet component is fixedly installed on the connecting handle. The ratchet component has multiple ratchet teeth. A pawl component that rotatably connects to the handrail panel is engaged with the ratchet component. The handrail panel is also provided with a first elastic element, which acts on the pawl component to make it tightly engage with the ratchet component. When the handrail panel rotates upward, the pawl component engages with the corresponding ratchet teeth in one direction. At the same time, in order to facilitate the return of the handrail panel, the ratchet component is provided with a first protrusion and a second protrusion, and the pawl component is provided with a third protrusion. After the handrail panel rotates to the highest position, the third protrusion will abut against the first protrusion, causing the pawl component to rotate clockwise as a whole, and at the same time causing the pawl to disengage from the ratchet teeth. In this way, when the handrail panel rotates forward, the ratchet teeth will not abut against the pawl. When the handrail panel rotates to the lowest position, the second protrusion can cause the pawl component to rotate counterclockwise, allowing the pawl to re-engage with the ratchet teeth, and the pawl component to return to the initial position. However, this design has shortcomings.

[0004] The entire handrail panel and connecting handle consist of numerous components and have a complex structure, making installation difficult and costly.

[0005] The ratchet and pawl mechanism can only engage in one direction, so the armrest can only be flipped up and adjusted from low to high. If you want to flip it down and adjust it from high to low, you have to flip the armrest panel to the highest position and then return it to the previous position. This does not conform to the operating habits of some diners and results in a poor user experience. Summary of the Invention

[0006] This utility model provides an armrest tilting and adjusting mechanism and a seat. A fixed tooth and a snap-fit ​​component connected to a control switch are provided between a fixed seat and a rotating seat. This allows the operator to control the snap-fit ​​component to engage or disengage with the gear groove on the fixed tooth according to their needs. The entire mechanism has few parts, a simple structure, and low manufacturing cost. The operator also does not need to perform a return operation when adjusting the angle of the armrest body, thus improving the user experience of the armrest.

[0007] The technical solution of this utility model is implemented as follows: A handrail tilting and adjusting mechanism includes a handrail bracket and a handrail body. A fixed seat and a rotating seat are respectively connected to the handrail bracket and the handrail body. The rotating seat is rotatably connected to the fixed seat via a rotating shaft, allowing the handrail body to tilt up and down. A locking control component is provided between the fixed seat and the rotating seat. The locking control component includes a control switch movably connected to the rotating seat and a fixing tooth fixedly connected to the fixed seat. The fixing tooth has multiple circumferentially distributed gear slots, and the control switch has a corresponding latching component. Under the action of external force, the control switch moves and engages or disengages the latching component with the corresponding gear slot, so that the handrail body is held in a predetermined position relative to the handrail bracket or can tilt up and down freely.

[0008] Preferably, the fixed base includes two fixed supports arranged symmetrically on the left and right, and the rotating base is located between the two fixed supports; each fixed support is provided with the fixed toothed component on its inner side; when the control switch is activated, the snap-fit ​​component can simultaneously engage or disengage with the stop tooth groove on the two fixed toothed components.

[0009] Preferably, the shaft includes two symmetrical half-shafts, each half-shaft having a wide section and a narrow section, and the cross-sectional shape of the half-shaft is T-shaped; the two narrow sections are joined together and locked with screws; the two wide sections abut against the outside of the fixed support respectively; the two detachable half-shafts are easy to install, and after the two narrow sections are joined together, the two wide sections can provide axial positioning for the shaft.

[0010] Preferably, a limiting groove is provided on the outer end face of the fixed support, and a limiting protrusion corresponding to the limiting groove is provided on the inner end face of each width segment. The limiting protrusion is inserted into the limiting groove to restrict the rotation of the shaft in the circumferential direction, thereby avoiding friction on the fixed support due to the rotation of the shaft.

[0011] Preferably, the fixing toothed component includes a body and a plurality of circumferentially distributed fixing teeth integrally formed with the body and protruding from the body, with the stop groove formed between every two adjacent fixing teeth; the body is non-circular in shape, and a positioning groove matching the body is provided on the side end face of the fixing seat, the body is fitted into the positioning groove to restrict the circumferential rotation of the fixing toothed component; so as to ensure that the snap-fit ​​component engages with the fixing toothed component.

[0012] Preferably, the rotating base includes a base body and a shell-shaped portion integrally formed on the base body. The base body and the fixed base are rotatably connected, and the shell-shaped portion is used to connect with the handrail body. The control switch is rotatably connected inside the shell-shaped portion, and one end of the control switch extends out of the shell-shaped portion and forms a control part. The shell-shaped portion is provided with a clearance groove corresponding to the position of the fixed tooth. The snap-fit ​​component connected to the control switch engages or disengages with the stop tooth groove on the fixed tooth through the clearance groove. The shell-shaped portion provides internal installation space for the control switch and the snap-fit ​​component, so that the snap-fit ​​component and the control switch are not completely exposed, reducing the space occupied by the two, and also making the handrail appearance simpler.

[0013] Preferably, the fixed toothed component includes a body and a plurality of circumferentially distributed fixed teeth integrally formed with the body and protruding from the body, wherein the gear slot is formed between every two adjacent fixed teeth; the clearance groove is a strip extending in the front-back direction; the fixed teeth are inserted into the clearance groove so that the snap-fit ​​component engages or disengages with the corresponding gear slot.

[0014] Preferably, both the snap-fit ​​component and the fixing tooth are rigid metal components; the high strength of rigid metal components ensures that the handrail body can be stably maintained in the predetermined position when the snap-fit ​​component and the fixing tooth are engaged.

[0015] Preferably, it also includes an elastic element disposed on the rotating seat, the elastic element acting on the control switch and forcing the snap-fit ​​element to always have a tendency to snap into the gear slot.

[0016] A seat, including the aforementioned armrest tilting and adjusting mechanism.

[0017] The beneficial effects of this utility model, which adopts the above technical solution, are as follows: This invention features a fixed toothed component and a snap-fit ​​component connected to a control switch between a fixed base and a rotating base. This allows the operator to control the snap-fit ​​component to engage or disengage with the gear groove on the fixed toothed component via the control switch, enabling the handrail body to be flipped up or down at any time. The entire mechanism has fewer parts, a simpler structure, and lower manufacturing costs. Furthermore, the operator does not need to perform a return operation when adjusting the angle of the handrail body, thus improving the user experience.

[0018] The rotating base has a shell-like part. The hollow structure of the shell-like part provides installation space for the control switch and the snap-fit ​​component, avoiding their exposure and affecting the appearance of the handrail, while making the structure of the handrail mechanism more compact.

[0019] Both the fixing teeth and the snap-fit ​​parts are rigid metal parts with high structural strength and long service life. When they are engaged with each other, they can keep the handrail body stably in the predetermined position. Attached Figure Description

[0020] Figure 1 A schematic diagram of the armrest tilting and adjusting mechanism; Figure 2 An exploded view of the armrest tilting and adjusting mechanism; Figure 3 This is a schematic diagram showing the control section exposed outside the shell-shaped section; Figure 4 A cross-sectional view of the toothed section inserted into the clearance groove; Figure 5 A cross-sectional view for controlling the position of the components; Figure 6This is a schematic diagram showing one of the fixed teeth after it has separated from the corresponding positioning groove. Figure 7 This is a schematic diagram showing the two halves of the shaft after they have separated. The attached figures are labeled as follows: 1-Handrail bracket, 11-Fixed seat, 12-Positioning groove, 13-Limiting groove, 2-Handrail body, 21-Rotating seat, 211-Shaft hole, 212-Allowing opening, 213-Allowing through groove, 214-Strip groove, 22-Cap, 3-Fixing tooth, 31-Gear tooth groove, 32-Fixing tooth, 4-Snap-fit, 5-Control switch, 51-Control part, 6-Rotating shaft, 61-Half shaft, 62-Positioning groove, 63-Positioning block, 64-Limiting protrusion, 7-End cap. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] The specific embodiments of this utility model are as follows: like Figure 1-7As shown, this embodiment provides a handrail flipping adjustment mechanism, including a handrail support 1 and a handrail body 2. The handrail support 1 is a rod-shaped member. A fixed seat 11 and a rotating seat 21 are respectively connected to the handrail support 1 and the handrail body 2. The fixed seat 11 is located at the top of the rod-shaped handrail support 1. The rotating seat 21 is rotatably connected to the fixed seat 11 via a rotating shaft 6, allowing the handrail body 2 to flip up and down. To ensure that the handrail body 2 can remain stable at a predetermined angle position, a locking control component is provided between the fixed seat 11 and the rotating seat 21. The locking control component includes a control switch 5 movably connected to the rotating seat 21 and a fixing tooth 3 fixedly connected to the fixed seat 11. Multiple teeth are evenly distributed along the circumference on the fixing tooth 3. Each gear slot 31 has a corresponding locking element 4 on the control switch 5. Under external force, the control switch 5 moves and engages or disengages the locking element 4 with the corresponding gear slot 31, so that the handrail body 2 is held in a predetermined position relative to the handrail bracket 1 or can freely rotate up and down. Specifically, in the initial state, the locking element 4 is engaged in one of the gear slots 31. When the angle of the handrail body 2 needs to be adjusted, simply activate the control switch 5 to disengage the locking element 4 from the gear slot 31. At this time, the handrail body 2 can freely rotate up and down without needing to return to the original position. When the handrail body 2 rotates to the predetermined position, the locking element 4 engages with the other gear slot 31, so that the handrail body 2 can be stably held in the predetermined position.

[0024] Furthermore, the fixed base 11 includes two fixed supports arranged symmetrically on the left and right sides, and the fixed supports are provided with a central hole extending in the left and right direction; the rotating base 21 is located between the two fixed supports; in order to keep the handrail body 2 stably in the predetermined position, each fixed support is provided with the aforementioned fixed tooth 3 on its inner side to form two engagement points in the left and right direction; the engaging member 4 extends in the left and right direction and can engage with the fixed tooth 3 at the same time; when the control switch 5 is activated, the engaging member 4 engages or disengages with the stop groove 31 on the two fixed tooth 3 at the same time.

[0025] Furthermore, for ease of assembly, the rotating shaft 6 in this embodiment includes two symmetrical half-shafts 61. Each half-shaft 61 has a wide section and a narrow section, and the cross-sectional shape of the half-shaft 61 is T-shaped. One half-shaft 61 has a through hole extending axially, and the other half-shaft has a screw hole on its inner end face. During assembly, the narrow sections of the two half-shafts 61 are inserted into the central hole from the outside of the corresponding fixed support, and then the screws are passed through the through hole and locked into the screw hole, so that the two narrow sections are mated and locked together to complete the installation of the rotating shaft 6. At this time, the two wide sections abut against the outside of the fixed support, forming an axial positioning for the rotating shaft 6. The structure is simple and ingenious, and no extra axial positioning parts are required.

[0026] Furthermore, a positioning groove 62 is provided on the inner end face of the narrow section of one half-shaft 61, and a positioning block 63 is provided on the inner end face of the narrow section of the other half-shaft. When the two narrow sections are joined, the positioning block 63 can be inserted into the positioning groove 62. In addition to quickly aligning the screw hole and the through hole, the positioning structure formed by the positioning groove 62 and the positioning block 63 can also restrict the two half-shafts 61 from moving around in the circumferential direction, preventing the screws from loosening.

[0027] Furthermore, each fixed support is also connected to an end cap 7 on its outer side. The end cap 7 can cover the width of the half shaft 61 from the side, making the overall appearance and integration of the handrail mechanism look better. A slot is provided on the outer end face of the fixed support 7, and an elastic buckle is provided on the end cap 7. During installation, the elastic buckle is engaged with the slot, so that the end cap 7 is detachably connected to the fixed support.

[0028] Furthermore, in this embodiment, the rotating shaft 6 is a rotating support shaft, which mainly supports the rotation of the rotating seat 21. It does not need to rotate circumferentially itself. Therefore, in order to restrict the rotation of the rotating shaft 6, a limiting groove 13 is provided on the outer end face of the fixed support, and a limiting protrusion 64 corresponding to the limiting groove 13 is provided on the inner end face of each width section. The limiting protrusion 64 is inserted into the limiting groove 13, which also avoids large rotational friction on the fixed support due to the rotation of the rotating shaft 6.

[0029] Furthermore, the fixing tooth 3 includes a body and a plurality of circumferentially distributed fixing teeth 32 integrally formed with the body and protruding from the body. The stop groove 31 is formed between every two adjacent fixing teeth 32. In order to prevent the fixing tooth 3 from moving around in the circumferential direction, the shape of the body in this embodiment is non-circular. For example, the body in this embodiment is roughly T-shaped. The side end face of the fixing seat 11 is provided with a positioning groove 12 that matches the body. The body is fitted into the positioning groove 12 to restrict the fixing tooth 3 from rotating around in the circumferential direction.

[0030] Furthermore, the rotating seat 21 includes a seat body and a shell-shaped portion integrally formed on the seat body. The shell-shaped portion includes a housing with an opening at the top and a cover 22 that is matched and installed at the opening. The cover 22 is connected to the armrest body 2, and the connection method can be any of a fixed connection, a rotating connection, or a sliding connection. The seat body and the fixed seat 11 are rotatably connected, and the shell-shaped portion is used to connect to the armrest body 2. The control switch 5 is rotatably connected inside the shell-shaped portion, and one end of the control switch 5 extends out of the shell-shaped portion and forms a control part 51. Specifically, a shaft seat is provided inside the housing, and a shaft hole 211 is provided on the shaft seat. The control switch 5 has a matching rotating shaft. The control switch 5 is inserted into the shaft hole 211, allowing it to be rotatably connected to the housing. The front side of the housing has a through clearance opening 212, through which one end of the control switch 5 passes and forms the control part 51 that is easy for the hand to press. The shell-shaped part has a clearance groove 213 corresponding to the position of the fixed tooth 3. The snap-fit ​​part 4 connected to the control switch 5 is engaged or disengaged from the stop tooth groove 31 on the fixed tooth 3 through the clearance groove 213. The shell-shaped part provides internal installation space for the control switch 5 and the snap-fit ​​part 4, so that the snap-fit ​​part 4 and the control switch 5 are not completely exposed, reducing the space occupied by the two and making the handrail look simpler.

[0031] Furthermore, in order to avoid the snap-fit ​​part 4 and prevent the snap-fit ​​part 4 from interfering with the inner wall of the housing, the inner wall of the housing is provided with a strip groove 214 that communicates with the avoidance through groove 213. When the snap-fit ​​part 4 is engaged with the fixing tooth 3, the snap-fit ​​part 4 is located in the strip groove 214. When the snap-fit ​​part 4 is separated from the fixing tooth 3, the snap-fit ​​part 4 also comes out of the strip groove 214.

[0032] Furthermore, in order to make the gear engagement structure formed by the fixed tooth 3 and the snap-fit ​​4 more compact, the clearance groove 213 described in this embodiment is a strip extending in the front-back direction; the fixed tooth 32 on the fixed tooth 3 is inserted into the clearance groove 213, thereby entering the housing, reducing the space occupied by the fixed tooth 3, and at the same time enabling the snap-fit ​​4 to engage or disengage with the corresponding gear slot 31.

[0033] Furthermore, in this embodiment, both the snap-fit ​​component 4 and the fixing tooth 3 are rigid metal parts. Rigid metal parts have high strength and long service life, which can ensure that when the snap-fit ​​component 4 and the fixing tooth 3 are engaged, the handrail body 2 can be stably held in the predetermined position. Specifically, the control switch 5 is a plastic molded part, and the snap-fit ​​component 4 is a plate-shaped metal part that extends to the left and right. In order to facilitate the assembly of the handrail mechanism, one end of the snap-fit ​​component 4 is embedded in the control switch 5, and the other end is exposed so as to engage with the fixing tooth 3. In this way, during assembly, it is only necessary to install the control switch 5 into place.

[0034] Furthermore, to ensure the stability of the handrail body 2 in the initial state, the handrail tilting adjustment mechanism also includes an elastic element (not shown) mounted on the rotating seat 21. The elastic element acts on the control switch 5 and forces the locking member 4 to always tend to engage with the gear slot 31. The elastic element can be a compression spring or tension spring mounted between the control switch 3 and the housing, or a torsion spring mounted on the rotating shaft of the control switch 5 and acting on the housing and the control switch respectively. When an external force presses the control part 51 and separates the locking member 4 from the fixed gear 3, the elastic element deforms. When the external force is removed, the elastic element resets and the control part 51 returns to its initial position, causing the locking member 4 to engage with the fixed gear 3 again.

[0035] Furthermore, a chair is provided, including a seat (not shown), a backrest (not shown), and the aforementioned armrest tilting and adjusting mechanism. The armrest tilting and adjusting mechanism is provided on both the left and right sides of the seat or the left and right sides of the backrest. The armrest bracket is connected to the backrest or seat, so that the occupant can freely adjust the angle and support position of the armrest when sitting.

[0036] 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 tilting and adjusting mechanism, characterized in that, The armrest includes a support bracket (1) and an armrest body (2). The support bracket (1) and the armrest body (2) are respectively connected to a fixed seat (11) and a rotating seat (21). The rotating seat (21) is rotatably connected to the fixed seat (11) via a rotating shaft (6), so that the armrest body (2) can be flipped up and down. A locking control component is provided between the fixed seat (11) and the rotating seat (21). The locking control component includes a control switch (5) movably connected to the rotating seat (21) and a fixed tooth (3) fixedly connected to the fixed seat (11). Multiple gear slots (31) are evenly distributed along the circumference on the fixed tooth (3). A corresponding snap-fit ​​component (4) is provided on the control switch (5). Under the action of external force, the control switch (5) moves and the snap-fit ​​component (4) engages or disengages with the corresponding gear slot (31), so that the armrest body (2) is held in a predetermined position relative to the armrest bracket (1) or can be freely flipped up and down.

2. The armrest tilting and adjusting mechanism according to claim 1, characterized in that: The fixed seat (11) includes two fixed supports arranged symmetrically on the left and right, and the rotating seat (21) is located between the two fixed supports; the fixed tooth (3) is provided on the inner side of each fixed support; when the control switch (5) is active, the snap-fit ​​(4) can simultaneously engage or disengage with the stop tooth groove (31) on the two fixed tooth (3).

3. The armrest tilting and adjusting mechanism according to claim 2, characterized in that: The rotating shaft (6) includes two left-right symmetrical half shafts (61), each half shaft (61) including a wide section and a narrow section, and the cross-sectional shape of the half shaft (61) is T-shaped; the two narrow sections are connected to each other and locked with screws; the two wide sections abut against the outside of the fixed support respectively.

4. The armrest tilting and adjusting mechanism according to claim 3, characterized in that: A limiting groove (13) is provided on the outer end face of the fixed support, and a limiting protrusion (64) corresponding to the limiting groove (13) is provided on the inner end face of each wide section. The limiting protrusion (64) is inserted into the limiting groove (13) to restrict the rotating shaft (6) from rotating in the circumferential direction.

5. The armrest tilting and adjusting mechanism according to claim 1, characterized in that: The fixed tooth (3) includes a body and a plurality of circumferentially distributed fixed teeth (32) integrally formed with the body and protruding from the body. The stop groove (31) is formed between every two adjacent fixed teeth (32). The body is non-circular in shape. The side end face of the fixed seat (11) is provided with a positioning groove (12) that matches the body. The body is fitted into the positioning groove (12) to restrict the fixed tooth (3) from rotating circumferentially.

6. The armrest tilting and adjusting mechanism according to claim 1, characterized in that: The rotating seat (21) includes a seat body and a shell-shaped part integrally formed on the seat body. The seat body and the fixed seat (11) are rotatably connected. The shell-shaped part is used to connect with the armrest body (2). The control switch (5) is rotatably connected inside the shell-shaped part. One end of the control switch (5) extends out of the shell-shaped part and forms a control part (51). The shell-shaped part is provided with a clearance groove (213) corresponding to the position of the fixed tooth (3). The snap-fit ​​part (4) connected to the control switch (5) is snapped or separated from the stop tooth groove (31) on the fixed tooth (3) through the clearance groove (213).

7. The armrest tilting and adjusting mechanism according to claim 6, characterized in that: The fixed tooth (3) includes a body and a plurality of circumferentially distributed fixed teeth (32) integrally formed with the body and protruding from the body. The gear slot (31) is formed between every two adjacent fixed teeth (32). The clearance groove (213) is a strip extending in the front-back direction. The fixed teeth (32) are inserted into the clearance groove (213) so that the snap-fit ​​(4) engages or disengages with the corresponding gear slot (31).

8. The armrest tilting and adjusting mechanism according to claim 1, characterized in that: Both the snap-fit ​​component (4) and the fixing tooth component (3) are rigid metal parts.

9. The armrest tilting and adjusting mechanism according to claim 1, characterized in that: It also includes an elastic element set on the rotating seat (21), which acts on the control switch (5) and forces the snap-fit ​​element (4) to always have the tendency to snap into the gear slot (31).

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

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