Gear adjustment structure and armrest device suitable for a seat

Abstract

This application discloses a gear adjustment structure and armrest device suitable for seating, including a support member and an adjusting member. The adjusting member is slidably connected to the support member along its length. A locking head is connected to the adjusting member, and the support member is provided with multiple gear grooves. When the adjusting member slides back and forth relative to the support member, the locking head engages with the multiple gear grooves in sequence. At least one of the first and last ends of the gear grooves is configured as an end groove, and the remaining gear grooves are configured as transition grooves. The end grooves and transition grooves differ in inclination or curvature. The damping sensation of the locking head sliding from the end groove into the transition groove is less than the damping sensation of the locking head sliding between adjacent transition grooves. The gear adjustment structure and armrest device for seating provided by this application require only a small force to perform sliding adjustment operation when the support member is at its first or last end. This also makes the sliding adjustment process stable and provides sufficient gear feedback, making the sliding adjustment operation of the support member more stable and smooth.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a gear adjustment structure and armrest device suitable for seating. Background Technology

[0002] With the profound changes in modern office and lifestyle, people's demands for comfort and personalization in their work and study environments are increasing, especially in scenarios where people sit for long periods of time, which places higher demands on the functionality and adaptability of chair armrests. Although the design of traditional chair armrests has improved, it is generally limited to basic height and rotation adjustments. Different users have different needs for the front and back positions of the armrests due to factors such as height, arm length, job nature, and even personal preferences.

[0003] To address the aforementioned issues, a type of seat with adjustable armrests is currently available on the market. This type of seat includes a support member and an armrest frame connecting the support member and the seat. An adjustment member is located at the top of the armrest frame, and the adjustment member is slidably connected to the support member. The adjustment member has a spring-loaded locking head, and the support member has multiple slots along its length. When the support member slides back and forth, the locking head engages with the multiple slots under the spring force, allowing the support member to be suspended in multiple back and forth positions.

[0004] While the support component described above allows for forward and backward adjustment, it suffers from the following problems: The multiple slots on the support component have the same shape, meaning the damping felt by the user is consistent regardless of the component's position. This results in the user often needing to apply considerable force to disengage the locking head from its current slot when initially adjusting the support component. However, excessive force on the support component may cause it to adjust too many positions at once after disengaging, requiring further adjustment to the correct position. This makes the sliding adjustment operation of the support component somewhat clunky. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a gear adjustment structure and armrest device suitable for seating. By configuring the end slots at the beginning and end of the gear slot with different inclinations or curvatures from the intermediate transition slot, the damping sensation of the latch sliding from the end slot into the transition slot is less than the damping sensation of the latch sliding between adjacent transition slots. This allows the support member to perform sliding adjustment operation with only a small force at the beginning or end, while also making the sliding adjustment process stable and providing sufficient gear feel, making the sliding adjustment operation of the support member more stable and smooth.

[0006] The effect of this utility model is achieved as follows: In a first aspect, this application provides a gear adjustment structure suitable for seating, including a support member and an adjustment member. The adjustment member is slidably connected to the support member along its length direction, and a locking head is connected to the adjustment member. The support member is provided with multiple gear slots. When the adjustment member slides back and forth relative to the support member, the locking head engages with the multiple gear slots in sequence. At least one of the beginning and end of the gear slot is configured as an end slot, and the remaining gear slots are configured as transition slots. The end slots and transition slots have differences in inclination or curvature. The damping sensation of the locking head sliding from the end slot into the transition slot is less than the damping sensation of the locking head sliding between adjacent transition slots.

[0007] Furthermore, the transition groove is an arc-shaped groove, and the side of the end groove closest to the transition groove is configured as a release surface, the curvature of which is smaller than that of the transition groove. This reduces the resistance encountered when the gear slot slides out of the end groove along the release surface, making the sliding adjustment operation of the support component more stable and smooth. In addition, the release surface is only formed on the side of the end groove closest to the transition groove, resulting in better connection stability between the chuck and the end groove, making the support component less prone to wobbling and providing better stability.

[0008] Furthermore, the release surface is vertical, and its inclination relative to the centerline of the support is 20-30°. This allows the locking head to more smoothly disengage from the end slot along the release surface, further improving the smoothness of the support's sliding adjustment operation.

[0009] Furthermore, both the beginning and end of the gear shift groove are configured as endpoint grooves. This ensures that the support member experiences low damping when initiating adjustment operations, regardless of whether it is located at the beginning or end, further enhancing the smoothness and stability of the support member's sliding adjustment operation.

[0010] Secondly, this application provides an armrest device, including an armrest frame and a position adjustment structure suitable for seating. A support member is configured to support the user's arm; a sliding groove extending in a front-to-back direction is formed on the support member, and an adjustment member slides with the support member through the sliding groove. Multiple position slots are formed on the sidewalls of the sliding groove, and the armrest frame is connected to the adjustment member, allowing the support member to slide back and forth relative to the armrest frame. By applying the position adjustment mechanism suitable for seating to the armrest device, the user only needs to apply a small force to slide and adjust the support member at the beginning or end of the armrest, which also makes the sliding adjustment process stable and provides sufficient position feedback, making the sliding adjustment operation of the armrest device more stable and smooth.

[0011] Furthermore, the support component has a hollow structure, with its internal gaps configured as sliding grooves. The bottom of the support component also features a locating groove extending in the front-to-back direction, connecting to the sliding grooves. A connecting seat is located at the top of the handrail frame, passing through the locating groove. The connecting seat and the adjusting component are fixedly connected by screws. When the support component slides back and forth, the connecting seat slides along the locating groove. This increases the connection strength between the handrail frame and the support component, and the sliding fit between the connecting seat and the locating groove limits the sliding adjustment range of the support component, thereby further improving the stability of the support component's sliding adjustment operation.

[0012] Furthermore, the adjusting component has through holes cut out along its left and right sides. Two symmetrical locking heads are provided on the adjusting component, both slidingly connected to it through the through holes. Multiple position slots are formed on the left and right sides of the sliding groove. A first elastic element is installed within the through holes, and its elastic force acts on the locking heads on both sides, causing them to always tend to move away from each other. This enhances the connection strength between the adjusting component and the support component, resulting in better stability of the sliding adjustment operation of the support component. Furthermore, the locking heads on both sides tend to engage with the position slots, resulting in a simple structure that fixes the support component in the current adjustment position.

[0013] Furthermore, the bottom of the adjusting component is provided with several elastic parts capable of elastic deformation. When the adjusting component is screwed onto the connecting seat, the elastic parts compress the bottom of the sliding groove and generate elastic deformation. This makes the adjusting component, the supporting component, and the handrail frame more compact and enhances the damping between the adjusting component and the supporting component, thereby improving the stability of the sliding adjustment operation of the supporting component.

[0014] Furthermore, the adjusting component has a split structure, including a sliding part and a rotating part. The sliding part is slidably connected to the support component via a groove, and the rotating part is rotatably connected to the sliding part. The handrail frame is fixedly connected to the rotating part, allowing the support component to rotate left and right relative to the handrail frame. This expands the functionality of the handrail adjusting structure and enhances its practicality.

[0015] Furthermore, a rotating groove is recessed in the sliding part, through which the rotating part engages with the sliding part. A rotation adjustment mechanism is provided between the rotating part and the sliding part. The rotation adjustment mechanism includes a locking member and multiple slots. The locking member is movably connected to one of the rotating part and the groove wall, and the multiple slots are formed in the other of the rotating part and the groove wall. When the support member rotates relative to the handrail frame, the locking member engages with the multiple slots in sequence. This provides a strong sense of control during the rotation adjustment of the support member relative to the handrail frame, and the support member can be suspended at multiple rotation angles with good stability.

[0016] Furthermore, the rotating part has a horizontally extending mounting groove, through which the locking member is slidably connected to the rotating part. The groove wall of the rotating part has multiple corresponding slots. A second elastic member is installed within the mounting groove, and the elastic force of the second elastic member acts on the locking member, causing the locking member to always tend to engage with the slots. This ensures that regardless of the angle to which the support member rotates, the locking member can engage with the slots under the elastic force of the second elastic member, thereby suspending the support member at the current rotation angle with good stability.

[0017] Furthermore, the bottom of the rotating part is provided with a columnar protrusion, and the bottom of the rotating groove is hollowed out to form a circular rotating hole. The protrusion is rotatably connected to the sliding part through the rotating hole. This makes the rotating part and the sliding part relatively fixed in the horizontal direction, and the connection strength between the two is higher, resulting in better stability of the rotation adjustment operation of the support.

[0018] The seat adjustment structure and armrest device provided in this application configure the end slots at the beginning and end of the adjustment slots with different inclinations or curvatures from the intermediate transition slots. This results in less resistance when the locking head slides from the end slot into the transition slot than when it slides between adjacent transition slots. Specifically, when the support is at the beginning or end, the user only needs to apply a small force to the support to slide the locking head from the end slot into the transition slot. Then, by applying appropriate force, the user can move the locking head sequentially between multiple transition slots until it reaches the desired position. This allows for easy adjustment with minimal force when the support is at the beginning or end, ensuring a stable and responsive adjustment process. It also prevents excessive force from causing the support to adjust too many positions at once when at the beginning or end, resulting in a more stable and smoother sliding adjustment operation. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a three-dimensional structural diagram of the handrail device provided in the embodiments of this application; Figure 2 A schematic diagram of the connection structure between the support member, the adjusting member, and the handrail frame provided in the embodiments of this application; Figure 3 This is a schematic diagram of the connection structure between the support member and the adjusting member provided in the embodiments of this application; Figure 4 This is a schematic diagram of the connection structure between the rotating part and the sliding part provided in an embodiment of this application; Figure 5 This is a schematic diagram of the internal structure of the rotating part provided in an embodiment of this application; Figure 6 A schematic diagram illustrating the change process between the adjusting member and the supporting member when the card head is located in the end slot, as provided in an embodiment of this application; Figure 7 A schematic diagram illustrating the change process between the adjusting member and the supporting member when the card head slides on the disengagement surface, as provided in an embodiment of this application. Figure 8 A schematic diagram illustrating the change process between the adjusting member and the supporting member when the card head slides into the transition groove according to an embodiment of this application; Figure 9 This is a schematic diagram illustrating the change process between the adjusting member and the support member after the support member is rotated, as provided in the embodiments of this application.

[0020] The reference numerals in the attached drawings are as follows: 1-Support member, 1a-Upper housing, 1b-Lower housing, 110-Slide groove, 111-Grip groove, 111a-End point groove, 111b-Transition groove, 112-Detachment surface, 120-Positioning groove, 2-Handrail frame, 210-Connecting seat, 3-Adjusting member, 3a-Sliding part, 3b-Rotating part, 301-Through hole, 302-Rotating groove, 303-Card slot, 304-Mounting groove, 305-Rotating hole, 310-Card head, 320-First elastic member, 330-Elastic part, 340-Locking member, 350-Second elastic member, 360-Protrusion, 361-Connecting hole. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0022] Please refer to the attached document. Figure 1-9 This application provides a gear adjustment structure suitable for seating, including a support member 1 and an adjustment member 3. The adjustment member 3 is slidably connected to the support member 1 along its length. A locking head 310 is connected to the adjustment member 3. The support member 1 is provided with a plurality of gear slots 111. When the adjustment member 3 slides back and forth relative to the support member 1, the locking head 310 engages with the plurality of gear slots 111 in sequence. At least one of the first and last ends of the gear slots 111 is configured as an end slot 111a. The remaining gear slots 111 are configured as transition slots 111b. The end slots 111a and transition slots 111b have differences in inclination or curvature. The damping sensation of the locking head 310 sliding from the end slot 111a into the transition slot 111b is less than the damping sensation of the locking head 310 sliding between adjacent transition slots 111b.

[0023] In this embodiment, by configuring the end slot 111a at the beginning or end of the gear slot 111 to have different inclinations or curvatures from the intermediate transition slot 111b, the damping sensation of the clasp 310 sliding from the end slot 111a into the transition slot 111b is less than the damping sensation of the clasp 310 sliding between adjacent transition slots 111b. That is, when the support member 1 is located at the beginning or end, the user only needs to apply a small force to the support member 1 to drive the clasp 310 from the end slot 111a into the transition slot 111b. Subsequently, the user can apply an appropriate force to drive the clasp 310 to slide sequentially between multiple transition slots 111b until it slides to the appropriate position. Therefore, only a small force needs to be applied to the support 1 at the beginning or end for sliding adjustment, which also makes the sliding adjustment process stable and has sufficient sense of gear. This avoids the support 1 adjusting too many gears at once due to excessive force applied by the user at the beginning or end, making the sliding adjustment operation of the support 1 more stable and smooth.

[0024] Please refer to the attached document. Figure 7-9 In some embodiments of this application, the transition groove 111b is an arc-shaped groove, and the groove wall of the end groove 111a near the transition groove 111b is configured as a separation surface 112, the curvature of the separation surface 112 being smaller than the curvature of the transition groove 111b.

[0025] In this embodiment, the transition groove 111b is an arc-shaped groove, and the end of the locking head 310 is also a corresponding arc-shaped structure. This allows the locking head 310 to slide smoothly out of the transition groove 111b and into the next transition groove 111b when the adjusting member 3 slides along the slide groove 110. Furthermore, the curvature of the release surface 112 on the end groove 111a is smaller than that of the transition groove 111b, resulting in less resistance when the stop groove 310 slides out of the end groove 111a along the release surface 112. This makes the sliding adjustment operation of the support member 1 more stable and smooth. Moreover, the release surface 112 is only formed on the side of the end groove 111a closest to the transition groove 111b. The curvature of the side of the end groove 111a away from the transition groove 111b is the same as that of the transition groove 111b. That is, when the support member 1 is located at the beginning or end, the connection stability between the locking head 310 and the end groove 111a is better, and the support member 1 is less prone to shaking, resulting in better stability.

[0026] Please refer to the attached document. Figure 7-9 In some embodiments of this application, the detachment surface 112 is a vertical surface, and the inclination of the detachment surface 112 relative to the center line of the support member 1 is 20-30°.

[0027] In this embodiment, by configuring the release surface 112 as a vertical surface, the locking head 310 can more smoothly release from the endpoint groove 111a along the release surface 112, further improving the smoothness of the sliding adjustment operation of the support member 1.

[0028] Please refer to the attached document. Figure 7-9 In some embodiments of this application, both the beginning and end of the gear slot 111 are configured as end slots 111a. This ensures that the support member 1 experiences low damping when the adjustment operation begins, regardless of whether it is located at the beginning or end, further improving the smoothness and stability of the sliding adjustment operation of the support member 1.

[0029] Please refer to the attached document. Figure 2-3 This application embodiment also provides an armrest device, including an armrest frame 2 and a gear adjustment structure suitable for seating. A support member 1 is configured to support the user's arm. A sliding groove 110 extending in the front-back direction is formed on the support member 1. An adjustment member 3 slides with the support member 1 through the sliding groove 110. A plurality of gear slots 111 are formed on the side wall of the sliding groove 110. The armrest frame 2 is connected to the adjustment member 3, so that the support member 1 can slide back and forth relative to the armrest frame 2.

[0030] In this embodiment, a gear adjustment mechanism suitable for seating is applied to the armrest device. The support member 1 supports the user's arm. When the user adjusts the armrest, only a small force is required to slide the support member 1 at its head or tail, ensuring a stable sliding adjustment process with sufficient gear feedback. This makes the sliding adjustment operation of the armrest device more stable and smooth. Furthermore, a groove 110 is provided on the support member 1 to slide and engage with the adjusting member 3, resulting in a stronger connection between the support member 1 and the adjusting member 3 and better stability of the armrest adjustment operation.

[0031] Of course, in other embodiments of this application, the gear adjustment mechanism applicable to seating can also be used in other furniture, such as headrests, lumbar supports, etc. of chairs. The adjustment member 3 can also be used as a component in an armrest device to support the user's arms, with the corresponding armrest frame 2 connected to the support member 1.

[0032] Please refer to the attached document. Figure 2-3 The support member 1 has a hollow structure, and the internal cavity is configured as a sliding groove 110. The bottom of the support member 1 is also hollowed out and has a positioning groove 120 extending in the front-back direction. The positioning groove 120 is connected to the sliding groove 110. The top of the handrail frame 2 is provided with a connecting seat 210, which passes through the positioning groove 120. The connecting seat 210 and the adjusting member 3 are fixedly connected by screws. When the support member 1 slides back and forth, the connecting seat 210 slides back and forth along the positioning groove 120.

[0033] In this embodiment, the connecting seat 210 on the handrail 2 passes through the positioning groove 120 and connects with the adjusting member 3 inside the support member 1, which makes the connection strength between the handrail 2 and the support member 1 higher. The sliding fit between the connecting seat 210 and the positioning groove 120 limits the sliding adjustment range of the support member 1, thereby further improving the stability of the sliding adjustment operation of the support member 1.

[0034] Preferably, the support member 1 is a split structure, including an upper shell 1a and a lower shell 1b that are spliced ​​together. The upper shell 1a and the lower shell 1b are detachably connected by a snap-fit ​​connection. The lower shell 1b has a recessed groove 110 and a positioning groove 120. After the adjusting member 3 is inserted into the groove 110, screws are tightened to fix the adjusting member 3 and the connecting seat 210. Then, the upper shell 1a is placed on top of the lower shell 1b, thus completing the assembly of the handrail adjustment structure, which is relatively simple.

[0035] Please refer to the attached document. Figure 4 In some embodiments of this application, the adjusting member 3 is provided with through holes 301 along the left and right directions, and the adjusting member 3 is provided with two symmetrical locking heads 310. Both locking heads 310 are slidably connected to the adjusting member 3 through the through holes 301. Multiple stop grooves 111 are formed on the left and right side walls of the sliding groove 110. A first elastic member 320 is provided in the through hole 301. The elastic force of the first elastic member 320 acts on the locking heads 310 on the left and right sides, so that the two locking heads 310 always tend to move away from each other.

[0036] In this embodiment, the adjusting member 3 and the slide groove 110 are connected by two sets of left and right locking heads 310 and the gear slot 111, which enhances the connection strength between the adjusting member 3 and the support member 1, making the sliding adjustment operation of the support member 1 more stable. Furthermore, the two locking heads 310 are connected by a first elastic member 320, and under the elastic force of the first elastic member 320, they tend to move away from each other, meaning that both locking heads 310 tend to engage with the gear slot 111. This simple structure ensures that no matter where the support member 1 slides, the locking heads 310 can engage with the gear slot 111 under the elastic force of the first elastic member 320, thereby fixing the support member 1 in the current adjustment position.

[0037] Preferably, each of the left and right sides of the slide groove 110 is provided with eighteen adjustable slots 111, meaning that the support member 1 has at least eighteen adjustable sliding positions, providing a high degree of freedom. Of course, in other embodiments of this application, the number of adjustable slots 111 can also be sixteen, seventeen, nineteen, etc.

[0038] Preferably, the first elastic element 320 is a spring, which not only has good elastic deformation capability, but is also relatively easy to install.

[0039] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the bottom of the adjusting member 3 is provided with a plurality of elastic parts 330 with elastic deformation capability. When the adjusting member 3 is screwed to the connecting seat 210, the elastic parts 330 press the bottom of the groove 110 and generate elastic deformation.

[0040] In this embodiment, simply connecting the adjusting member 3, the support member 1, and the handrail frame 2 with screws results in a relatively loose connection between the three components. This leads to weak damping during sliding adjustment of the support member 1, and the support member 1 is prone to wobbling, resulting in poor stability. Therefore, by providing an elastic part 330 at the bottom of the adjusting member 3, the elastic part 330 undergoes elastic deformation and presses against the bottom of the sliding groove 110, making the adjusting member 3, the support member 1, and the handrail frame 2 more compact and enhancing the damping between the adjusting member 3 and the support member 1. This improves the stability of the sliding adjustment operation of the support member 1.

[0041] Preferably, the elastic part 330 has a hook-like structure, which has good elastic deformation capability and is easy to injection mold. The bottom of the adjusting member 3 is provided with four symmetrically distributed elastic parts 330, thereby further enhancing the connection strength between the adjusting member 3 and the supporting member 1.

[0042] Please refer to the attached document. Figure 4-5 In some embodiments of this application, the adjusting member 3 is a split structure, including a sliding part 3a and a rotating part 3b. The sliding part 3a is slidably connected to the support member 1 through the sliding groove 110, the rotating part 3b is rotatably connected to the sliding part 3a, and the handrail 2 is fixedly connected to the rotating part 3b, so that the support member 1 can rotate left and right relative to the handrail 2.

[0043] In this embodiment, the adjusting member 3 includes a sliding part 3a and a rotating part 3b that can rotate relative to each other. The sliding part 3a and the slide groove 110 are slidably engaged, and the handrail frame 2 and the rotating part 3b are fixedly connected. That is, the support member 1 can not only slide and adjust relative to the handrail frame 2 back and forth, but also rotate and adjust relative to the handrail frame 2 left and right, which expands the function of the handrail adjusting structure and makes it more practical.

[0044] Please refer to the attached document. Figure 8-9 In some embodiments of this application, a rotating groove 302 is recessed on the sliding part 3a, and the rotating part 3b is engaged with the sliding part 3a through the rotating groove 302; a rotation adjustment mechanism is provided between the rotating part 3b and the sliding part 3a, the rotation adjustment mechanism includes a locking member 340 and a plurality of slots 303, the locking member 340 is movably connected to one of the rotating part 3b and the groove wall of the rotating groove 302, and the plurality of slots 303 are formed in the other of the rotating part 3b and the groove wall of the rotating groove 302; when the support member 1 rotates relative to the handrail frame 2, the locking member 340 engages with the plurality of slots 303 in sequence.

[0045] In this embodiment, the rotation part 3b and the sliding part 3a are engaged by the locking member 340 and multiple slots 303 to achieve gear adjustment, so that the rotation adjustment operation of the support member 1 relative to the handrail 2 has a strong sense of gear position, and the support member 1 can be suspended at multiple rotation angles, with good stability.

[0046] Please refer to the attached document. Figure 5 and attached Figure 9 In some embodiments of this application, a horizontally extending mounting groove 304 is provided on the rotating part 3b. The locking member 340 is slidably connected to the rotating part 3b through the mounting groove 304. A plurality of slots 303 are correspondingly provided on the groove wall of the rotating groove 302. A second elastic member 350 is provided inside the mounting groove 304. The elastic force of the second elastic member 350 acts on the locking member 340, causing the locking member 340 to always tend to engage with the slots 303. This ensures that no matter what angle the support member 1 rotates to, the locking member 340 can engage with the slots 303 under the elastic force of the second elastic member 350, thereby suspending the support member 1 at the current rotation angle, resulting in good stability.

[0047] Preferably, locking elements 340 are provided on both the front and rear sides of the rotating part 3b, and slots 303 are provided on both the front and rear sides of the rotating groove 302, which improves the connection strength between the rotating part 3b and the sliding part 3a and enhances the stability of the rotation adjustment operation of the support member 1. Furthermore, seven slots 303 are provided on either the front or rear side of the rotating groove 302, meaning the support member 1 has at least seven adjustable rotation positions, providing a high degree of freedom. Of course, in other embodiments of this application, the number of slots 303 can also be five, six, eight, etc.

[0048] Preferably, the second elastic element 350 is a spring, which not only has good elastic deformation capability, but is also easy to install.

[0049] Please refer to the attached document. Figure 5 In some embodiments of this application, the bottom of the rotating part 3b is provided with a columnar protrusion 360, and the bottom of the rotating groove 302 is hollowed out to form a circular rotating hole 305. The protrusion 360 is rotatably connected to the sliding part 3a through the rotating hole 305. This makes the rotating part 3b and the sliding part 3a relatively fixed in the horizontal direction, and the connection strength between the two is higher, which makes the rotation adjustment operation of the support member 1 more stable.

[0050] The bottom of the protrusion 360 has a recessed connection hole 361. After the connecting seat 210 passes through the positioning groove 120, it is engaged with the rotating part 361 through the connection hole 361. Furthermore, the connecting seat 210 has an irregular shape, and the connection hole 361 is also a corresponding irregular shape, so that the rotating part 3b and the connecting seat 210 are relatively fixed in the circumferential direction, that is, the two can rotate synchronously relative to the sliding part 3a, thereby driving the handrail frame 2 and the support member 1 to rotate relative to each other.

[0051] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0052] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A gear adjustment structure suitable for seating, characterized in that, The device includes a support member (1) and an adjusting member (3). The adjusting member (3) is slidably connected to the support member (1) along its length. A locking head (310) is connected to the adjusting member (3). The support member (1) is provided with multiple gear slots (111). When the adjusting member (3) slides back and forth relative to the support member (1), the locking head (310) engages with the multiple gear slots (111) in sequence. At least one of the first and last ends of the gear slots (111) One end slot (111a) is configured as a terminal slot (111a), and several gear slots (111) other than the end slot (111a) are configured as transition slots (111b). The end slot (111a) and the transition slot (111b) have differences in inclination or curvature. The damping feeling of the jack (310) sliding from the end slot (111a) into the transition slot (111b) is less than the damping feeling of the jack (310) sliding between adjacent transition slots (111b).

2. The position adjustment structure for seating according to claim 1, characterized in that, The transition groove (111b) is an arc-shaped groove, and the end groove (111a) is configured with a separation surface (112) on the side of the groove wall near the transition groove (111b). The curvature of the separation surface (112) is smaller than that of the transition groove (111b).

3. The position adjustment structure for seating according to claim 2, characterized in that, The detachment surface (112) is a vertical surface, and the inclination of the detachment surface (112) relative to the center line of the support member (1) is 20-30°.

4. The position adjustment structure for seating according to claim 1, characterized in that, The first and last ends of the gear slot (111) are both configured as the end slot (111a).

5. A handrail device, characterized in that, The device includes an armrest (2) and a gear adjustment structure for seating as described in any one of claims 1-4, wherein the support member (1) is configured to support the user's arm; a sliding groove (110) extending in a front-to-back direction is formed on the support member (1), the adjustment member (3) is slidably engaged with the support member (1) through the sliding groove (110), a plurality of gear slots (111) are formed on the side wall of the sliding groove (110), and the armrest (2) is connected to the adjustment member (3) such that the support member (1) can slide back and forth relative to the armrest (2).

6. The handrail device according to claim 5, characterized in that, The support member (1) is a hollow structure, and the cavity inside is configured as the slide groove (110). The bottom of the support member (1) is also hollowed out and has a positioning groove (120) extending in the front-back direction. The positioning groove (120) is connected to the slide groove (110). The top of the handrail frame (2) is provided with a connecting seat (210). The connecting seat (210) passes through the positioning groove (120), and the connecting seat (210) and the adjusting member (3) are fixedly connected by screws. When the support member (1) slides back and forth, the connecting seat (210) slides back and forth along the positioning groove (120).

7. The handrail device according to claim 5, characterized in that, The adjusting member (3) has a through hole (301) hollowed out along the left and right sides. The adjusting member (3) has two symmetrical locking heads (310). The two locking heads (310) are slidably connected to the adjusting member (3) through the through hole (301). The left and right sides of the sliding groove (110) have multiple gear slots (111). A first elastic member (320) is provided in the through hole (301). The elastic force of the first elastic member (320) acts on the locking heads (310) on the left and right sides, so that the two locking heads (310) always tend to move away from each other.

8. The handrail device according to claim 6, characterized in that, The bottom of the adjusting member (3) is provided with several elastic parts (330) with elastic deformation capability. When the adjusting member (3) is screwed to the connecting seat (210), the elastic parts (330) squeeze the bottom of the groove (110) and generate elastic deformation.

9. The handrail device according to claim 5, characterized in that, The adjusting member (3) is a split structure, including a sliding part (3a) and a rotating part (3b). The sliding part (3a) is slidably connected to the support member (1) through the slide groove (110). The rotating part (3b) is rotatably connected to the sliding part (3a), and the handrail frame (2) is fixedly connected to the rotating part (3b), so that the support member (1) can rotate left and right relative to the handrail frame (2).

10. The handrail device according to claim 9, characterized in that, A rotating groove (302) is recessed on the sliding part (3a), and the rotating part (3b) is engaged with the sliding part (3a) through the rotating groove (302); a rotation adjustment mechanism is provided between the rotating part (3b) and the sliding part (3a), the rotation adjustment mechanism includes a locking member (340) and a plurality of slots (303), the locking member (340) is movably connected to one of the rotating part (3b) and the groove wall of the rotating groove (302), and the plurality of slots (303) are opened in the other of the groove wall of the rotating part (3b) and the rotating groove (302); when the support member (1) rotates relative to the handrail frame (2), the locking member (340) engages with the plurality of slots (303) in sequence.

11. The handrail device according to claim 10, characterized in that, The rotating part (3b) is provided with a mounting groove (304) extending in the horizontal direction. The locking member (340) is slidably connected to the rotating part (3b) through the mounting groove (304). The groove wall of the rotating part (302) is provided with a plurality of slots (303). A second elastic member (350) is provided in the mounting groove (304). The elastic force of the second elastic member (350) acts on the locking member (340), so that the locking member (340) always has the tendency to be inserted into the slot (303).

12. The handrail device according to claim 10, characterized in that, The bottom of the rotating part (3b) is provided with a columnar protrusion (360), and the bottom of the rotating groove (302) is hollowed out to form a circular rotating hole (305). The protrusion (360) is rotatably connected to the sliding part (3a) through the rotating hole (305).

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