Bidirectional sliding adjustment device for furniture

Abstract

The application discloses a bidirectional sliding adjusting device suitable for furniture, which comprises a supporting piece, a sliding piece and a wheel-shaped adjusting piece, a sliding groove extending along a vertical direction is recessed on the supporting piece, the sliding piece is connected to the supporting piece through the sliding groove and slides up and down, a plurality of ratchets arranged along the vertical direction are arranged on one side groove wall of the sliding groove, the adjusting piece is rotationally connected to the sliding piece, the axial direction of the adjusting piece is arranged in the front-back direction, a pair of ratchet claws symmetrically arranged in the up-down direction is arranged on the side of the adjusting piece close to the ratchets, the ratchet claw arranged on the upside is an upper ratchet claw, the upper ratchet claw is arranged in an upward inclination, the ratchet claw arranged on the downside is a lower ratchet claw, the lower ratchet claw is arranged in a downward inclination, and one of the upper ratchet claw and the lower ratchet claw is engaged with the ratchets. The bidirectional sliding adjusting device suitable for furniture has the advantages that the sliding adjusting operation of the sliding piece has strong gear feeling and high stability, the sliding piece can be adjusted in two directions, and the adjusting operation is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and specifically to a bidirectional sliding adjustment device suitable for furniture. Background Technology

[0002] For furniture such as chairs and sofas, adjustability is one of the main consumer demands. For example, common chair adjustment functions include seat height adjustment, backrest tilt adjustment, headrest height adjustment, lumbar support height adjustment, and armrest height adjustment. To accommodate height adjustments for components like the lumbar support and headrest, existing manufacturers typically use a stable and easy-to-use cyclic height adjustment mechanism.

[0003] For example, an existing patent provides a back support device and a seat (application number: CN202422590373.0). The height of the chair back relative to the connecting frame is adjustable. A first locking member on the connecting frame cooperates with a locking groove in the through groove of the chair back. The first locking member automatically engages with the locking groove due to the elastic force of the first elastic member. At the same time, by providing a first guide surface and a first reset surface at both ends of the through groove, the first locking tooth can smoothly slide through and engage or disengage from the locking groove when the chair back slides up and down. The user only needs to lift the chair back, and the first locking member and the locking groove will engage in sequence. Releasing the chair back will fix the chair back at the desired height.

[0004] However, the above solution has the following problems: if the adjusted height is too high, the chair back cannot be slid down directly for adjustment. Instead, it needs to be pulled upwards to the highest position to separate the first locking element from the position slot. After sliding down to the lowest position to reset, the first locking element re-engages with the position slot before the chair back can be raised again for height adjustment. In other words, the chair back can only be adjusted in one direction, making the operation very cumbersome when the chair back height needs to be readjusted.

[0005] Therefore, how to provide a device that can perform bidirectional gear adjustment has become the main problem that needs to be solved. Summary of the Invention

[0006] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a bidirectional sliding adjustment device suitable for furniture. The upper or lower pawl moving between the ratchet teeth not only makes the sliding adjustment operation of the slider have a strong sense of stop and strong stability, but also allows the slider to switch its direction of movement by simply rotating the adjustment device to engage the other of the upper or lower pawl with the ratchet teeth, regardless of the position of the slider. The slider can perform irreversible sliding adjustment operations in two directions with a strong sense of stop, thus making the position adjustment operation of the slider more convenient.

[0007] The effect of this utility model is achieved as follows: This application provides a bidirectional sliding adjustment device suitable for furniture, including a support, a slider, and a wheel-shaped adjustment component. The support has a recessed groove extending vertically, and the slider is slidably connected to the support through the groove. A plurality of ratchet teeth arranged vertically are provided on one side wall of the groove. The adjustment component is rotatably connected to the slider, and the axis of the adjustment component is set in the front-back direction. A pair of symmetrical pawls are provided on the side of the adjustment component near the ratchet teeth. The upper pawl is configured as the upper pawl and is inclined upward, and the lower pawl is configured as the lower pawl and is inclined downward. One of the upper pawl and the lower pawl engages with the ratchet teeth. The bidirectional sliding adjustment device has a switchable rising state and a falling state. In the rising state, the adjusting member rotates until the lower pawl engages with the ratchet teeth, and the upper pawl avoids the ratchet teeth. When the sliding member moves upward relative to the support member, the lower pawl engages with multiple ratchet teeth in sequence. In the falling state, the adjusting member rotates until the upper pawl engages with the ratchet teeth, and the lower pawl avoids the ratchet teeth. When the sliding member moves downward relative to the support member, the upper pawl engages with multiple ratchet teeth in sequence.

[0008] Furthermore, a state transition mechanism is provided between the sliding member and the adjusting member. This mechanism includes two adjacent slots and a locking head. The locking head is movably connected to one of the sliding member and the adjusting member, and the two slots are located in the other slot. When the bidirectional sliding adjusting device is in the rising or falling state, the locking head engages with one of the two slots. When the adjusting member rotates, the locking head slides from the current slot into the adjacent slot, and the bidirectional sliding adjusting device switches between the rising and falling states. This makes the state transition operation of the bidirectional sliding adjusting device not only simple but also provides good stability.

[0009] Furthermore, the adjusting component has two adjacent slots, and the sliding component has a recessed receiving groove. The locking head engages with the sliding component through the receiving groove, and an elastic element is provided within the receiving groove. The elastic force of the elastic element acts on the locking head, causing the locking head to always tend to move towards the adjusting component. With the help of the elastic force of the elastic element, the upper or lower pawl always tends to rotate towards the ratchet, thereby making the sliding adjustment operation of the sliding component more responsive and stable.

[0010] Furthermore, the two slots are separated by an arc-shaped limiting protrusion, allowing the locking head to engage or disengage from the slots along the arc surface of the limiting protrusion. This makes the movement of the locking head between the two slots smoother and more stable, thus simplifying the switching operation of the bidirectional sliding adjustment device.

[0011] Furthermore, the locking head has a spherical structure, and the locking groove is also a corresponding arc-shaped groove. This further improves the smoothness of the locking head sliding between the locking grooves, and also makes the state switching operation of the bidirectional sliding adjustment device more effortless and smooth.

[0012] Furthermore, a recessed groove is formed on the slider, and the adjusting component is located within the groove. The groove has an opening on the side near the ratchet, through which the upper or lower pawl protrudes and engages with the ratchet. This improves the connection strength and stability between the slider and the adjusting component, and also reduces the space occupied by the combined components in the front-to-back direction, facilitating the engagement of the upper or lower pawl with the ratchet.

[0013] Furthermore, the adjusting component includes a rear columnar positioning part, and the sliding component has a rotating hole extending through it along the front-rear direction. The bottom of the sliding groove is hollowed out to form a limiting groove extending in the vertical direction. The positioning part passes through the rotating hole and engages with the limiting groove, allowing the positioning part to not only rotate in its own circumference but also slide up and down along the limiting groove. The limiting groove restricts the sliding distance of the positioning part, thus limiting the sliding distance of the adjusting component and the sliding component, further improving the stability of the sliding adjustment operation of the sliding component.

[0014] Furthermore, the positioning part is exposed on the rear side of the support member, and an adjustment knob is fixedly connected to the positioning part. The adjustment knob is configured to drive the adjustment member to rotate together through the positioning part. This not only makes it convenient for the user to operate the adjustment member to rotate, i.e., switch the state of the bidirectional sliding adjustment device, but also makes the overall strength and stability of the bidirectional sliding adjustment device better.

[0015] The bidirectional sliding adjustment device for furniture provided in this application involves a rotatable adjustment component that engages with ratchet teeth on a support component via two sets of upper and lower pawls. Because the lower pawl is tilted downwards, in the upward state, when the slider slides upwards, the lower pawl can disengage from the ratchet teeth along its own tilt direction and move between multiple ratchet teeth. Simultaneously, the lower pawl presses firmly against the ratchet teeth downwards, preventing the slider from sliding downwards. Similarly, because the upper pawl is tilted upwards, in the downward state, when the slider slides downwards, the upper pawl can disengage from the ratchet teeth along its own tilt direction and move between multiple ratchet teeth. Simultaneously, the upper pawl presses firmly against the ratchet teeth upwards, preventing the slider from sliding upwards. The movement of the upper or lower pawl between the ratchet teeth not only provides a strong sense of positioning and stability for the sliding adjustment operation of the slider, but also allows the slider to switch directions of movement simply by rotating the adjusting component to engage the other of the upper or lower pawl with the ratchet teeth, regardless of its position. This enables irreversible and highly responsive sliding adjustment in both directions. Compared to existing cyclic adjustment devices, there is no need to slide the slider to its limit position and then reset it for readjustment, making the slider position adjustment operation much simpler. Attached Figure Description

[0016] 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 1This is a three-dimensional structural diagram of the bidirectional sliding adjustment device provided in the embodiments of this application; Figure 2 This is a schematic diagram of the connection structure between the support member and the sliding member provided in an embodiment of this application; Figure 3 This is a schematic diagram of the connection structure between the adjusting member and the sliding member provided in an embodiment of this application; Figure 4 A schematic diagram illustrating the change process of the bidirectional sliding adjustment device when switching states, as provided in an embodiment of this application. Figure 5 A schematic diagram illustrating the changes in the slider and adjusting member in the rising state provided in an embodiment of this application; Figure 6 This is a schematic diagram illustrating the changes in the slider and adjusting member during the descent state, as provided in an embodiment of this application.

[0017] The reference numerals in the attached drawings are as follows: 1-Support member, 101-Slide groove, 102-Limiting groove, 110-Ratchet, 2-Sliding member, 210-Receiving groove, 220-Moving groove, 230-Rotating hole, 3-Adjusting member, 310-Upper pawl, 320-Lower pawl, 330-Slot, 340-Limiting protrusion, 350-Positioning part, 4-Clip head, 5-Elastic member, 6-Adjusting knob. Detailed Implementation

[0018] 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.

[0019] Please refer to the attached document. Figure 1-6 This application provides a bidirectional sliding adjustment device suitable for furniture, including a support member 1, a sliding member 2, and a wheel-shaped adjustment member 3. The support member 1 has a recessed groove 101 extending in the vertical direction. The sliding member 2 is slidably connected to the support member 1 through the groove 101. A plurality of ratchet teeth 110 arranged in the vertical direction are provided on one side wall of the groove 101. The adjustment member 3 is rotatably connected to the sliding member 2, and the axis of the adjustment member 3 is arranged in the front-back direction. A pair of symmetrical pawls are provided on the side of the adjustment member 3 near the ratchet teeth 110. The upper pawl is configured as the upper pawl 310, which is inclined upward. The lower pawl is configured as the lower pawl 320, which is inclined downward. One of the upper pawl 310 and the lower pawl 320 engages with the ratchet teeth 110. The bidirectional sliding adjustment device has a switchable rising state and a falling state. In the rising state, the adjusting member 3 rotates until the lower pawl 320 engages with the ratchet 110, and the upper pawl 310 avoids the ratchet 110. When the sliding member 2 moves upward relative to the support member 1, the lower pawl 320 engages with multiple ratchet 110 in sequence. In the falling state, the adjusting member 3 rotates until the upper pawl 310 engages with the ratchet 110, and the lower pawl 320 avoids the ratchet 110. When the sliding member 2 moves downward relative to the support member 1, the upper pawl 310 engages with multiple ratchet 110 in sequence.

[0020] In this embodiment, the rotatable adjusting member 3 engages with the ratchet teeth 110 on the support member 1 via two sets of upper and lower pawls. Please refer to the attached diagram. Figure 5 Because the lower pawl 320 is tilted downwards, when the slider 2 slides upwards in the upward state, the lower pawl 320 can disengage from the ratchet 110 along its tilt direction and move between the multiple ratchet teeth 110. Meanwhile, the lower pawl 320 presses firmly against the ratchet teeth 110 downwards, preventing the slider 2 from sliding downwards. Similarly, please refer to the appendix. Figure 6 Because the upper pawl 310 is tilted upwards, when the slider 2 slides downwards in the descending state, the upper pawl 310 can disengage from the ratchet 110 along its tilt direction and move between multiple ratchet teeth 110. Meanwhile, the upper pawl 310 presses firmly against the ratchet teeth 110, preventing the slider 2 from sliding upwards. The movement of the upper pawl 310 or lower pawl 320 between the ratchet teeth 110 not only provides a strong sense of positioning and stability for the slider 2's sliding adjustment operation, but also allows for irreversible and highly responsive sliding adjustments in both directions, regardless of the slider 2's position. Compared to existing cyclic adjustment devices, there is no need to slide the slider 2 to its limit position and then reset it for readjustment, making the slider 2's position adjustment operation much simpler.

[0021] Please refer to the attached document. Figure 3-4 In some embodiments of this application, a state transition mechanism is provided between the slider 2 and the adjusting member 3. The state transition mechanism includes two adjacent slots 330 and a locking head 4. The locking head 4 is movably connected to one of the slider 2 and the adjusting member 3, and the two slots 330 are opened in the other of the slider 2 and the adjusting member 3. When the bidirectional sliding adjusting device is in the rising or falling state, the locking head 4 is engaged with one of the two slots 330. When the adjusting member 3 rotates, the locking head 4 slides from the current slot 330 into the adjacent slot 330, and the bidirectional sliding adjusting device switches between the rising and falling states.

[0022] In this embodiment, by setting a state transition mechanism, the locking head 4 is engaged with the slot 330 to restrict the rotation of the adjusting member 3, thereby ensuring that the adjusting member 3 remains in its current state and does not easily change during the rising or falling state. Furthermore, when it is necessary to switch the state of the bidirectional sliding adjusting device, it is only necessary to rotate the adjusting member 3 to allow the locking head 4 to slide into the slot 330 on the other side. Therefore, the state switching operation of the bidirectional sliding adjusting device is not only simple but also has good stability.

[0023] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the adjusting member 3 is provided with two adjacent slots 330, the sliding member 2 is recessed with a receiving groove 210, the locking head 4 is locked to the sliding member 2 through the receiving groove 210, and an elastic member 5 is provided in the receiving groove 210. The elastic force of the elastic member 5 acts on the locking head 4, so that the locking head 4 always has a tendency to move towards the adjusting member 3.

[0024] In this embodiment, when the slider 2 slides, and the upper pawl 310 or lower pawl 320 slides out of the current ratchet 110 along its own inclined direction, the adjusting member 3 will also be driven to rotate slightly, and the chuck 4 will be squeezed by the inclined surface of the slot 330 and slide into the receiving slot 210. The elastic member 5 will undergo elastic deformation due to the squeezing of the chuck 4, causing the slider 2 to slide further. When the upper pawl 310 or lower pawl 320 is aligned with the next ratchet 110, the chuck 4 will be pushed by the return force of the elastic member 5 to squeeze the inclined surface of the slot 330, thereby forcing the adjusting member 3 to rotate and reset. The upper pawl 310 or lower pawl 320 will rotate toward the ratchet 110 until it engages. Thus, with the help of the elastic force of the elastic member 5, the upper pawl 310 or lower pawl 320 always has a tendency to rotate toward the ratchet 110, thereby making the sliding adjustment operation of the slider 2 have a stronger sense of gear and stability.

[0025] Preferably, the elastic element 5 is a spring, which gives the elastic element 5 good elasticity and low cost.

[0026] Of course, in other embodiments of this application, the card head 4 can also be installed on the adjusting member 3, and the card slot 330 can be formed on the sliding member 2.

[0027] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the two slots 330 are separated by an arc-shaped limiting protrusion 340, and the card head 4 can be inserted into or disengaged from the slot 330 along the arc surface of the limiting protrusion 340. This makes the movement of the card head 4 between the two slots 330 more stable and smooth, thereby making the state switching operation of the bidirectional sliding adjustment device simpler.

[0028] Please refer to the attached document. Figure 3-4In some embodiments of this application, the card head 4 has a spherical structure, and the card slot 330 is also a corresponding arc-shaped slot. This allows the card head 4 to slide smoothly between the card slots 330 when it presses against the wall of the card slot 330 or vice versa, following the arc surface of the card head 4 and the wall of the card slot 330. This also makes the state switching operation of the bidirectional sliding adjustment device more effortless and smoother.

[0029] Please refer to the attached document. Figure 2-3 In some embodiments of this application, a movable groove 220 is recessed on the slider 2, the adjusting member 3 is located in the movable groove 220, and the movable groove 220 is opened on the side near the ratchet 110. The upper pawl 310 or the lower pawl 320 passes through the slider 2 from the opening and engages with the ratchet 110.

[0030] In this embodiment, by providing the movable groove 220 to accommodate the sliding member 2, the connection strength and stability between the sliding member 2 and the adjusting member 3 are improved, and the space occupied by the two in the front-to-back direction is smaller after combination, which facilitates the engagement of the upper pawl 310 or the lower pawl 320 with the ratchet 110.

[0031] Preferably, the slot 330 is located on the side of the adjusting member 3 away from the ratchet 110, and the side wall of the movable slot 220 is correspondingly recessed to form a receiving slot 210.

[0032] Please refer to the attached document. Figure 2-3 In some embodiments of this application, the adjusting member 3 includes a rear column-shaped positioning part 350, the sliding member 2 is provided with a rotating hole 230 through the front and rear directions, the bottom of the groove 101 is hollowed out to form a limiting groove 102 extending in the vertical direction, the positioning part 350 passes through the rotating hole 230 and is engaged in the limiting groove 102, so that the positioning part 350 can not only rotate in its own circumference, but also slide up and down along the limiting groove 102.

[0033] In this embodiment, the columnar positioning part 350 is inserted into the rotating hole 230, and the positioning part 350 can rotate circumferentially within the rotating hole 230, thereby realizing the rotatable connection between the adjusting member 3 and the sliding member 2. Furthermore, the sliding distance of the positioning part 350 is limited by the limiting groove 102, which limits the sliding distance of the adjusting member 3 and the sliding member 2, further improving the stability of the sliding adjustment operation of the sliding member 2.

[0034] Please refer to the attached document. Figure 2 In some embodiments of this application, the positioning part 350 is exposed on the rear side of the support member 1, and an adjustment knob 6 is fixedly connected to the positioning part 350. The adjustment knob 6 is configured to drive the adjustment member 3 to rotate together through the positioning part 350.

[0035] In this embodiment, by setting the adjustment knob 6, it is not only convenient for the user to operate the adjustment member 3 to rotate (i.e., switch the state of the bidirectional sliding adjustment device), but also after the adjustment knob 6 and the positioning part 350 are fixed, the adjustment knob 6 and the adjustment member 3 clamp the support member 1 and the sliding member 2 in the middle, so that the four are relatively fixed in the horizontal direction, thereby making the overall strength and stability of the bidirectional sliding adjustment device better.

[0036] 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.

[0037] 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 bidirectional sliding adjustment device suitable for furniture, characterized in that, The device includes a support member (1), a sliding member (2), and a wheel-shaped adjusting member (3). The support member (1) has a recessed groove (101) extending vertically. The sliding member (2) is slidably connected to the support member (1) through the groove (101). A plurality of ratchet teeth (110) arranged vertically are provided on one side wall of the groove (101). The adjusting member (3) is rotatably connected to the sliding member (2), and the axis of the adjusting member (3) is arranged in the front-back direction. A pair of symmetrical pawls are provided on the side of the adjusting member (3) near the ratchet teeth (110). The pawl on the upper side is configured as the upper pawl (310), which is inclined upward. The pawl on the lower side is configured as the lower pawl (320), which is inclined downward. One of the upper pawl (310) and the lower pawl (320) engages with the ratchet teeth (110). The bidirectional sliding adjustment device has a switchable rising state and a falling state. In the rising state, the adjustment member (3) rotates until the lower pawl (320) engages with the ratchet (110) and the upper pawl (310) avoids the ratchet (110). When the sliding member (2) moves upward relative to the support member (1), the lower pawl (320) engages with multiple ratchet teeth (110) in sequence. In the falling state, the adjustment member (3) rotates until the upper pawl (310) engages with the ratchet (110) and the lower pawl (320) avoids the ratchet (110). When the sliding member (2) moves downward relative to the support member (1), the upper pawl (310) engages with multiple ratchet teeth (110) in sequence.

2. The bidirectional sliding adjustment device for furniture according to claim 1, characterized in that, A state transition mechanism is provided between the sliding member (2) and the adjusting member (3). The state transition mechanism includes two adjacent slots (330) and a locking head (4). The locking head (4) is movably connected to one of the sliding member (2) and the adjusting member (3). The two slots (330) are opened in the other of the sliding member (2) and the adjusting member (3). When the bidirectional sliding adjusting device is in the rising or falling state, the locking head (4) is engaged in one of the two slots (330). When the adjusting member (3) rotates, the locking head (4) slides from the current slot (330) into the adjacent slot (330). The bidirectional sliding adjusting device switches between the rising and falling states.

3. The bidirectional sliding adjustment device for furniture according to claim 2, characterized in that, The adjusting member (3) has two adjacent slots (330) on its upper and lower sides. The sliding member (2) has a recessed receiving groove (210). The locking head (4) is engaged with the sliding member (2) through the receiving groove (210). An elastic member (5) is provided in the receiving groove (210). The elastic force of the elastic member (5) acts on the locking head (4), so that the locking head (4) always has a tendency to move towards the adjusting member (3).

4. The bidirectional sliding adjustment device for furniture according to claim 2, characterized in that, The two slots (330) are separated by an arc-shaped limiting protrusion (340), and the card head (4) can be inserted into or removed from the slot (330) along the arc surface of the limiting protrusion (340).

5. The bidirectional sliding adjustment device for furniture according to claim 2, characterized in that, The card head (4) has a spherical structure, and the card slot (330) is also a corresponding arc-shaped slot.

6. The bidirectional sliding adjustment device for furniture according to claim 1, characterized in that, The sliding member (2) has a recessed groove (220) formed therein. The adjusting member (3) is located in the groove (220), and the groove (220) is opened on the side near the ratchet (110). The upper pawl (310) or the lower pawl (320) passes through the sliding member (2) from the opening and engages with the ratchet (110).

7. The bidirectional sliding adjustment device for furniture according to claim 1, characterized in that, The adjusting member (3) includes a rear column-shaped positioning part (350). The sliding member (2) has a rotating hole (230) that runs through it along the front and back directions. The bottom of the sliding groove (101) is hollowed out to form a limiting groove (102) that extends in the vertical direction. The positioning part (350) passes through the rotating hole (230) and is inserted into the limiting groove (102), so that the positioning part (350) can not only rotate along its own circumference, but also slide up and down along the limiting groove (102).

8. The bidirectional sliding adjustment device for furniture according to claim 7, characterized in that, The positioning part (350) is exposed on the rear side of the support member (1), and an adjustment knob (6) is fixedly connected to the positioning part (350). The adjustment knob (6) is configured to drive the adjustment member (3) to rotate together through the positioning part (350).

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