Displacement frame for furniture and sofa with displacement frame for furniture

Abstract

The utility model discloses a displacement frame for furniture. The displacement frame comprises a base, a displacement support, a clamping piece and a blocking mechanism. The blocking mechanism comprises a pivot swinging piece, a mechanism frame body, a reset piece and a blocking piece assembled on the mechanism frame body. The pivot swinging piece is provided with a swinging end and a pivoting end pivoted with one of the blocking piece and the mechanism frame body, and the other one of the blocking piece and the mechanism frame body is provided with a first hook matching position, a second hook matching position and an annular groove for guiding the swinging end to circularly move in a single direction between the first hook matching position and the second hook matching position; the swing end correspondingly blocks or breaks away from the unlocking driving structure by moving to the first matching hook position or the second matching hook position so that the clamping piece can move to the unlocking position from the locking position, and the swing end moves away from the first matching hook position or the second matching hook position in the reset process of the blocking piece. Therefore, the clamping piece is prevented from being accidentally unlocked by the unlocking driving structure due to the fact that the clamping piece is excessively adjusted towards the last clamping position along with the displacement support. In addition, the utility model further discloses a sofa comprising a seat part, a backrest and the displacement frame for the furniture.

Description

Technical Field

[0001] This utility model relates to a type of furniture, and more particularly to a furniture displacement frame and a sofa having the furniture displacement frame. Background Technology

[0002] In the backrest displacement frame disclosed in Chinese Patent No. 201920156668.3, when its locking block is adjusted to the foremost locking position along with the backrest, the locking block may be accidentally unlocked by the unlocking drive unit located in front of the locking position, thus causing the locking block to fail to lock at the foremost locking position.

[0003] Therefore, there is an urgent need for a furniture shifting frame and a sofa with such a furniture shifting frame to overcome the above-mentioned defects. Utility Model Content

[0004] One objective of this utility model is to provide a furniture displacement frame to solve the defect that the locking mechanism is accidentally unlocked when the locking member is adjusted to the end position of the displacement bracket.

[0005] Another objective of this invention is to provide a sofa that solves the defect of the locking mechanism being accidentally unlocked by the unlocking drive structure when the locking member is adjusted too far to the end position as the displacement bracket moves.

[0006] To achieve the above objectives, the furniture displacement frame of this utility model includes a base, a displacement support, a locking component, and a blocking mechanism. The locking component is assembled to the displacement support and can move between a locked position and an unlocked position. The displacement support is movably assembled to the base. The base is provided with an unlocking drive structure and multiple locking positions arranged together in the moving direction of the displacement support, providing unidirectional locking for the locking component in the locked position. During the process of the locking component moving from the locked position to the last locking position and maintaining its original direction of movement, the unlocking drive structure drives the locking component to move from the locked position to the unlocked position. The blocking mechanism includes a pivot, a frame assembled to one of the base and the displacement support, a blocking component assembled to the frame and moved by the displacement support only when it moves to the last locking position, and a blocking component for the... The resetting member provides a resetting force for the blocking member reset. The pivot member has a pivot end that is pivotally connected to one of the blocking member and the mechanism frame, and a swing end that follows the pivot end. The other of the blocking member and the mechanism frame is provided with a first hook position, a second hook position, and an annular groove for accommodating the swing end. The annular groove guides the swing end to make unidirectional cyclic movement between the first hook position and the second hook position under the cooperation of the blocking member being driven to move and the resetting movement. The swing end moves to the first hook position or the second hook position to block or disengage from the unlocking drive structure, causing the locking member to move from the locked position to the unlocked position. The swing end moves away from the first hook position or the second hook position during the resetting process of the blocking member.

[0007] Compared with existing technologies, the "blocking mechanism includes a pivot member, a mechanism frame assembled in one of a base and a displacement support, a blocking member assembled in the mechanism frame and moved on the mechanism frame only when the displacement support moves to the final locking position, and a resetting member that provides a resetting force for the blocking member to reset. The pivot member has a pivot end pivotally connected to one of the blocking member and the mechanism frame, and a swing end that follows the pivot end in pivoting. The other of the blocking member and the mechanism frame is provided with a first hook position, a second hook position, and an annular groove for accommodating the swing end. The annular groove guides the swing end in the cooperation of the blocking member being driven to move and resetting. The design of "unidirectional cyclic movement between the first and second hook positions" is such that when the engaging member follows the displacement bracket to adjust to the final locking position, the blocking member is moved to the first hook position by the movement of the swing end on the mechanism frame driven by the displacement bracket. At this time, the blocking member, with the cooperation of the pivot member, prevents the engaging member and the displacement bracket from continuing to move in the original direction, thereby preventing the unlocking drive structure from moving the engaging member from the locked position to the unlocked position. This solves the defect that the engaging member is accidentally unlocked by the unlocking drive structure when it is adjusted to the final locking position along with the displacement bracket. Furthermore, after the swing end moves to the first hook position, it can be moved appropriately towards the first and second locking positions via the displacement bracket. This allows the blocking member to self-reset under the action of the reset member, thus moving the swing end away from the first hook position. After the swing end moves away from the first hook position, the locking member then moves closer to the unlocking drive structure along with the displacement bracket. The displacement bracket drives the blocking member to move on the mechanism frame, thus moving the swing end to the second hook position. At this point, the blocking member, in cooperation with the pivot member, prevents the locking member and the displacement bracket from continuing to move in their original directions. Simultaneously, the unlocking drive structure also drives the locking member to move from the locked position to the unlocked position. Therefore, the blocking mechanism, while ensuring the unlocking drive structure can properly unlock the locking member, also solves the defect of the locking member being accidentally unlocked by the unlocking drive structure due to excessive adjustment towards the last locking position while following the displacement bracket.

[0008] Preferably, the first hook position is located between the second hook position and the pivot end in the reset direction of the blocking member, and the first hook position is also staggered from the pivot end and the second hook position in a vertical direction perpendicular to the reset direction of the blocking member.

[0009] Preferably, both the first and second hook positions are notches that communicate with the annular groove.

[0010] Preferably, the annular groove includes a first extending section extending along the reset direction of the blocking member, a second extending section arranged spaced apart from the first extending section in the vertical direction and extending beyond the first extending section in both the reset direction of the blocking member and in the opposite direction, an inclined section inclined relative to the reset direction of the blocking member and connected to one end of both the first and second extending sections, and an intermediate connecting section connected to the other end of both the first and second extending sections; the intermediate connecting section and the first extending section form a first step for preventing the swing end from moving backward from the intermediate connecting section to the first extending section, the second extending section and the inclined section form a second step for preventing the swing end from moving backward from the inclined section to the second extending section, the side of the intermediate connecting section near the inclined section communicates with the first hook position, and the side of the intermediate connecting section away from the inclined section has an arched structure opposite to and arching towards the first hook position; the second hook position communicates with the end of the inclined section away from the first extending section.

[0011] Preferably, the groove depths of the first extension section and the inclined section are arranged to increase progressively along the reset direction of the blocking member, and the groove depth of the second extension section is arranged to decrease progressively along the reset direction of the blocking member.

[0012] Preferably, the blocking mechanism further includes a compression spring, and the pivot member further has a connecting end connected between the pivot end and the swing end, a first end of the compression spring abutting against the side of the connecting end opposite to the blocking member, and a second end of the compression spring abutting against the position of the mechanism frame opposite to that side.

[0013] Preferably, the mechanism frame has an embedding cavity for the second end of the compression spring to be embedded and fixed.

[0014] Preferably, the blocking mechanism is arranged adjacent to the unlocking drive structure, the blocking member protrudes from the mechanism frame along its reset direction, and the displacement bracket is provided with a pushing structure opposite to the blocking member.

[0015] Preferably, the reset member is a reset spring, and the first side of the blocking member is provided with a column structure extending in a direction opposite to the reset direction of the blocking member. The column structure and the position of the blocking member driven by the displacement bracket are arranged on opposite sides. The reset spring is fitted onto the column structure and also abuts against the blocking member and the mechanism frame.

[0016] Preferably, the mechanism frame is provided with a buffer blocking rubber plug opposite to the first side of the blocking member, and the buffer blocking rubber plug engages with the first side of the blocking member when the swing end moves to the second hook position.

[0017] To achieve the above objectives, the sofa of this utility model includes a seat, a backrest, and the aforementioned furniture displacement frame, wherein the base is fixed inside the seat and the backrest is fixed to the displacement frame. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the sofa according to the present invention, showing the locking mechanism adjusting to the backrest and locking in the final position.

[0019] Figure 2 This is a perspective view of the furniture displacement frame of this utility model when the displacement bracket does not push the obstruction component to move.

[0020] Figure 3 yes Figure 2 3D exploded view.

[0021] Figure 4 yes Figure 3 A further exploded 3D diagram.

[0022] Figure 5 This is a diagram showing the state when the locking component moves to the final locking position along with the displacement bracket and the blocking component is not pushed by the displacement bracket.

[0023] Figure 6 This is a diagram showing the state after the locking member moves to the last locking position following the displacement bracket, and the blocking member is pushed by the displacement bracket to the swing end of the pivot member and moves to the first hook position.

[0024] Figure 7 It shows the state diagram when the card assembly is moved from the locked position to the unlocked position by the unlocking drive structure.

[0025] Figure 8 This is a perspective view of the blocking mechanism in the furniture displacement frame of this utility model moving to the first hook position at the swing end.

[0026] Figure 9 yes Figure 8 3D exploded view.

[0027] Figure 10 yes Figure 9 A three-dimensional exploded view from another angle.

[0028] Figure 11 yes Figure 8 A floor plan viewed in the direction indicated by arrow C.

[0029] Figure 12 It is along Figure 11 Internal view of the section cut along the DD line.

[0030] Figure 13 yes Figure 11 A plan view of part of the hidden mechanism frame structure.

[0031] Figure 14 Is Figure 13 Based on this, a state diagram is shown showing the swing end moving away from the first hook position and entering the second extension section of the annular groove.

[0032] Figure 15 Is Figure 14 Based on this, a state diagram showing the swing end moving to the second hook position is displayed.

[0033] Figure 16 This is a perspective view of the blocking component of the blocking mechanism in the furniture displacement frame of this utility model.

[0034] Figure 17 yes Figure 16 A stereoscopic view from another angle.

[0035] Figure 18 yes Figure 16 A floor plan viewed in the direction indicated by arrow C.

[0036] Figure 19 It is along Figure 18 Internal view of the section cut along the EE line.

[0037] Figure 20 It is along Figure 18 Internal view of the section cut along the FF line.

[0038] Figure 21 It is along Figure 18 Internal view of the section cut along the GG line.

[0039] Figure 22 This is a perspective view of the pivot component of the blocking mechanism in the furniture displacement frame of this utility model. Detailed Implementation

[0040] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0041] Please combine Figure 1 and Figure 2 The sofa 1000 of this utility model includes a furniture displacement frame 100, a seat 200 and a backrest 300, so that the backrest 300 can be adjusted on the seat 200 in the direction indicated by arrow A by means of the furniture displacement frame 100, thereby making the backrest 300 better meet the different cushioning needs of users.

[0042] Combination Figure 3 and Figure 4 As an example, the furniture displacement frame 100 includes a base 10, a displacement support 20, a locking member 30, and a blocking mechanism 40. Optionally, in... Figures 1 to 7 In this example, the blocking mechanism 40 is arranged adjacent to the unlocking drive structure 11 described below. This design simplifies the relationship between the blocking mechanism 40 and the displacement support 20. Obviously, depending on actual needs, the blocking mechanism 40 can also be arranged away from the unlocking drive structure 11, so it is not considered... Figures 1 to 7 The above is the limit.

[0043] The base 10 is fixed within the seat portion 200, which conceals and supports the base 10. The displacement bracket 20 is movably mounted on the base 10 to allow it to move along the direction indicated by arrow A and the opposite direction. The backrest 300 is fixed to the displacement bracket 20 to allow it to move relative to the base 10 along with the displacement bracket 20. Alternatively, as an example, a portion of the displacement bracket 20 extends upward through the seat portion 200 and is fixed to the backrest 300, which conceals this portion. This makes the sofa 1000 of this invention more streamlined in appearance. (See attached diagram). Figure 1 As shown; precisely because the furniture displacement frame 100 is covered by the seat 200 and the backrest 300, Figure 1 The furniture is not visible in the middle; it is a 100mm displacement frame.

[0044] Combined Figures 5 to 7 As an example, the snap-fit ​​30 is assembled onto the displacement bracket 20 and can be used to... Figure 5 or Figure 6 The lock position shown and Figure 7 The locking mechanism moves between the unlocking positions shown to satisfy the need for the engaging member 30 to engage at the locking position 12 described below when it moves to the locking position, and to disengage from the locking position 12 when it moves to the unlocking position. The base 10 is provided with an unlocking drive structure 11 and multiple locking positions 12 arranged in the moving direction of the displacement bracket 20 (see the direction indicated by arrow A and the opposite direction) for the engaging member 30 to engage in a one-way manner. That is, when the engaging member 30 engages with the locking position 12, it can only prevent the displacement bracket 20 from moving in the direction indicated by arrow A, but cannot prevent the displacement bracket 20 from moving in the opposite direction indicated by arrow A. Since the specific structure for the one-way engagement of the locking position 12 and the engaging member 30 is well known in the art, specifically the backrest displacement frame disclosed in Chinese Patent No. 201920156668.3, it will not be described again here. Furthermore, the engaging member 30 in the locking position moves to the last locking position 12 (e.g., but not limited to...). Figures 5 to 7 While the leftmost locking position 12 is moving in its original direction, the unlocking drive structure 11 drives the locking component 30 from the locked position to the unlocked position. (See status...) Figure 7As shown; it should be noted that the specific structure of how the unlocking drive structure 11 moves the locking member 30 from the locked position to the unlocked position is well known in the art, see the backrest displacement frame disclosed in Chinese Patent No. 201920156668.3, so it will not be described again here.

[0045] The blocking mechanism 40 includes a pivot 41, a mechanism frame 42, a blocking element 43, and a resetting element 44. Optionally, as an example, the resetting element 44 is a resetting spring to simplify its structure. Obviously, depending on actual needs, the resetting element 44 can also be a magnetic resetting element; therefore, it is not required. Figure 4 The diagram shows only the basic structure. The mechanism frame 42 is mounted on the base 10, which provides support for the mechanism frame 42. Obviously, depending on actual needs, the mechanism frame 42 can also be mounted on the displacement bracket 20, so this is not the case. Figures 2 to 4 The diagram shows a limit. The blocking component 43 is assembled onto the mechanism frame 42. The blocking component 43 is only moved onto the mechanism frame 42 by the displacement bracket 20 after the displacement bracket 20 has moved at least to the last locking position 12. See the diagram for the state. Figure 6 and Figure 7 As shown; alternatively, at Figures 5 to 7 In this example, the blocking member 43 protrudes from the mechanism frame 42 along its reset direction. The displacement bracket 42 is provided with a pushing structure 21 opposite to the blocking member 43. Combined with the adjacent blocking mechanism 40 and unlocking drive structure 11, this results in a shorter unidirectional stroke of the blocking member 43 and a shorter portion of the blocking member 43 protruding from the mechanism frame 42. See the attached diagram. Figures 5 to 7 As shown.

[0046] And combined Figures 13 to 15 As an example, the pivot member 41 has a pivot end 41a pivotally connected to the frame 42 and a swing end 41b that follows the pivot end 41a in pivoting. The blocking member 43 is provided with a first hook position 431, a second hook position 432, and an annular groove 433 for accommodating the swing end 41b. The annular groove 433 guides the swing member 41b to move unidirectionally between the first hook position 431 and the second hook position 432 under the cooperation of the blocking member 43 being driven to move and resetting. Figures 13 to 15 The cyclic movement (counterclockwise) occurs; the swing end 41b moves to the first hook position 431 and blocks the unlocking drive structure 11, causing the locking member 30 to move from the locked position to the unlocked position, as shown in the status diagram. Figure 6 As shown; the swing end 41b moves to the second hook position 432 and disengages from the blocking unlocking drive structure 11, causing the locking member 30 to move from the locked position to the unlocked position, as shown in the diagram. Figure 7As shown, the swing end 41b moves away from the first hook position 431 or the second hook position 432 during the resetting process of the blocking member 43, thereby satisfying the requirement for the swing end 41b to make unidirectional cyclic movement along the annular groove 433. It should be noted that although the attached figure shows that the first hook position 431, the second hook position 432 and the annular groove 433 are provided by the blocking member 43 and the pivot end 41a is pivotally connected to the mechanism frame 42, according to actual needs, the first hook position 431, the second hook position 432 and the annular groove 433 can also be provided by the mechanism frame 42 and the pivot end 41a can be pivotally connected to the blocking member 43, so it is not limited to what is shown in the attached figure. More specifically, as follows:

[0047] like Figures 13 to 15 As shown in the figure, as an example, the first hook position 431 is located between the second hook position 432 and the pivot end 41a in the reset direction of the blocking member 43 (see arrow A). The first hook position 431 is also staggered from the pivot end 41a and the second hook position 432 in a vertical direction perpendicular to the reset direction of the blocking member 43 (see arrow B and the opposite direction). Both the first hook position 431 and the second hook position 432 are notches that communicate with the annular groove 433. This design effectively ensures the reliability of the cyclic movement of the swing end 41b under the guidance of the annular groove 433. On the other hand, it simplifies the structure in which the first hook position 431 and the second hook position 432 are hooked to the swing end 41b respectively. In addition, since the first hook position 431 and the second hook position 432 can be obtained by expanding the annular groove 433, the processing is simplified.

[0048] like Figures 13 to 18 As an example, the annular groove 433 includes a first extension segment 4331 extending along the reset direction of the blocking member 43, a second extension segment 4332 arranged vertically spaced from the first extension segment 4331 and extending beyond the first extension segment 4331 along the reset direction of the blocking member 43 and in a direction opposite to the reset direction, an inclined segment 4333 inclined relative to the reset direction of the blocking member 43 and connected to one end of both the first extension segment 4331 and the second extension segment 4332, and an intermediate connecting segment 4334 connected to the other end of both the first extension segment 4331 and the second extension segment 4332. The intermediate connecting section 4334 and the first extension section 4331 form a first step 4335 to prevent the swing end 41b from moving backward from the intermediate connecting section 4334 to the first extension section 4331. The second extension section 4332 and the inclined section 4333 form a second step 4336 to prevent the swing end 41b from moving backward from the inclined section 4333 to the second extension section 4332. The intermediate connecting section 4334 is located on the side closest to the inclined section 433 (see...). Figure 18 The upper side of the middle section 4334 is connected to the first hook position 431, and the middle connecting section 4334 is on the side away from the inclined section 4333 (see Figure 18The lower side of the middle section has an arched structure 4337 that is opposite to and arches towards the first hook position 431; the second hook position 432 is connected to the end of the inclined section 4333 away from the first extension section 4331; therefore, through the cooperation of the inclined section 4333, the first extension section 4331, the intermediate connecting section 4334, the second extension section 4332, the first step 4335 and the second step 4336, the swing end 41b can only move in a unidirectional cycle starting from the end of the intermediate connecting section 4334 near the first extension section 4331, passing through the second extension section 4332, the inclined section 4333 and the first extension section 4331, and then returning to the intermediate connecting section 4334, thus effectively ensuring the smoothness and flexibility of the movement and switching of the blocking member 43; and during the process of the swing end 41b passing through the arched structure 4337, the arched structure 4337 controls the movement of the swing end 41b to the first hook position 431. Specifically, in Figure 18 In the example, the apex 4338 of the arched structure 4337 is offset from the first hook position 431 in the vertical direction, specifically offset relative to the first hook position 431 in the direction closer to the first extension segment 4331.

[0049] At Figure 19 In this example, the groove depth of the first extension section 4331 increases progressively along the reset direction of the blocking member 43; Figure 21 In this example, the groove depth of the inclined section 4333 increases progressively along the reset direction of the blocking member 43; Figure 20 In this example, the groove depth of the second extension section 4332 decreases along the reset direction of the blocking member 43; this design ensures the need for a first step 4335 to be formed between the intermediate connecting section 4334 and the first extension section 4331, and a second step 4336 to be formed between the second extension section 4332 and the inclined section 4333.

[0050] Combination Figure 10 , Figure 12 and Figure 22 As an example, the blocking mechanism 40 also includes a compression spring 45, and the pivot member 41 also has a connecting end 41c connecting the pivot end 41a and the swing end 41b, while the first end of the compression spring 45 (e.g. Figure 12 The lower end of the compression spring 45 abuts against the side of the connecting end 41c opposite to the blocking member 43, and the opposite second end of the compression spring 45 (e.g. Figure 12 The upper end of the middle part abuts against the position of the mechanism frame 42 opposite to that side (e.g.) Figure 12(The upper side of the frame 42 in the middle); therefore, by means of the compression spring 45, the axial movement (see the direction indicated by arrow C and the opposite direction) of the pivot 41 caused by the undulation of the bottom surface 433a of the annular groove 43 during the movement of the swing end 41b along the annular groove 433 is buffered and constrained, thereby ensuring the reliability of the swing end 41b cyclic movement on the annular groove 433.

[0051] In order to ensure that the compression spring 45 provides a reliable stabilizing effect, Figure 10 and Figure 12 As an example, the mechanism frame 42 has a second end for compressing the spring 45 (e.g., Figure 12 A fixed mounting cavity 422 is embedded in the upper end of the compression spring 45 so that the second end of the compression spring 45 is fixed by the mechanism frame 42; alternatively, in Figure 10 In the example shown, the cavity 422 is annular to facilitate its manufacturing. Obviously, depending on actual needs, the cavity 422 can also be other shapes; therefore, it is not considered... Figure 10 The above is for reference only. Additionally, to ensure smoother resetting of the blocking member 43, [further details are needed]. Figures 13 to 19 In this example, a column structure 434 extending in the opposite direction to the reset direction of the blocking member 43 is provided on the first side 43a of the blocking member 43. The column structure 434 and the position 43b of the blocking member 43 driven by the displacement bracket 20 are arranged opposite to each other. A reset spring is fitted onto the column structure 434 and also abuts against the blocking member 43 and the mechanism frame 42. In addition, for quieter operation, Figures 13 to 15 As an example, the mechanism frame 42 is provided with a buffer stop rubber plug 421 opposite to the first side 43a of the stop member 43. The buffer stop rubber plug 421 engages with the first side 43a of the stop member 43 when the swing end 41b enters the second hook position 432, as shown in the figure. Figure 15 As shown, the buffer stopper 421 is used to achieve the effect of buffering and silencing.

[0052] Referring to the accompanying drawings, the process of how the blocking mechanism 40 blocks and disengages from the blocking unlocking drive structure 12 to move the engaging member 30 from the locked position to the unlocked position is explained: When the engaging member 30 in the locked position moves to the last engaging position 12 along with the displacement bracket 20, and the displacement bracket 20 does not push against the blocking member 43, the state is as follows: Figure 5 As shown; at this time, the displacement bracket 20 continues to move in the original direction, causing the displacement bracket 20 to push the blocking member 43 to move into the retractable mechanism frame 42, and at the same time, causing the swing end 41b to move to the first hook position 431 under the action of the arched structure 4337, as shown in the state. Figure 13 As shown; at Figure 13In the process, because the movement of the blocking member 43 is blocked by the pivot member 41, the blocking member 43 prevents the engaging member 30 and the displacement motion frame 20 from continuing to move in their original directions, thereby preventing the unlocking drive structure 11 from moving the engaging member 30 from the locked position to the unlocked position.

[0053] When the swing end 41b needs to move away from the first hook position 431, the displacement bracket 20 moves appropriately in the direction indicated by arrow A, so that the blocking member 43 moves synchronously under the action of the resetting member 44. At the same time, the swing end 41b enters the second extension section 4332 of the annular groove 433. See the state below. Figure 14 As shown.

[0054] After the swing end 41b enters the second extension section 4332 of the annular groove 433, the displacement bracket 20 is moved in the opposite direction of arrow A. Simultaneously, the push-stopping member 43 moves in the opposite direction of arrow A, and the swing end 41b moves to the second hook position 432. (See the attached diagram.) Figure 15 As shown, at this time, the unlocking drive structure 11 can move the locking member 30 from the locked position to the unlocked position, as shown in the state. Figure 7 As shown.

[0055] Compared with the prior art, the "blocking mechanism 40" includes a pivot 41, a frame 42 mounted on one of the base 10 and the displacement bracket 20, a blocking member 43 mounted on the frame 42 and moved on the frame 42 by the displacement bracket 20 at least when it moves to the final locking position 12, and a resetting member 44 that provides a resetting force for the blocking member 43 to reset. The pivot 41 has a pivot end 41a pivotally connected to one of the blocking member 43 and the frame 42, and a swing end 41b that follows the pivot end 41a in pivoting. The other of the blocking member 43 and the frame 42 is provided with a first hook position 431, a second hook position 432, and... The annular groove 433 accommodates the swing end 41b, and the annular groove guides the swing end 41b to make unidirectional cyclic movement between the first hook position 431 and the second hook position 432 under the cooperation of the moving and resetting movement of the blocking member 43. This design is such that when the engaging member 30 follows the displacement bracket 20 to adjust to the last locking position 12, the blocking member 43 is moved on the mechanism frame 20 by the movement of the displacement bracket 20, causing the swing end 41a to move to the first hook position 431. At this time, the blocking member 43, in cooperation with the pivot member 41, prevents the engaging member 30 and the displacement bracket 20 from continuing to move in the original direction. See the state. Figure 6 and Figure 13As shown, this allows the locking mechanism 30 to move from the locked position to the unlocked position by blocking the unlocking drive structure 11, thus solving the defect that the locking mechanism 30 might be accidentally unlocked by the unlocking drive structure 11 due to excessive adjustment of the locking mechanism 30 to the last locking position 12 while following the displacement bracket 20. Furthermore, after the swing end 41b moves to the first hook position 431, it can be moved appropriately towards the first locking position 12 by the displacement bracket 20, allowing the blocking mechanism 43 to self-reset under the action of the reset mechanism 44, thereby causing the swing end 41b to move away from the first hook position 431. When the swing end 41b moves away from the first hook position 431, the locking mechanism 30 then moves closer to the unlocking drive structure 11 along with the displacement bracket 20. The displacement bracket 20 drives the movement of the blocking mechanism 43 on the mechanism frame 42, thereby moving the swing end 41b to the second hook position 432 (see state). Figure 15 As shown), the blocking member 43, in cooperation with the pivot member 41, prevents the engaging member 30 and the displacement bracket 20 from continuing to move in their original directions. At the same time, the unlocking drive structure 11 also drives the engaging member 30 to move from the locked position to the unlocked position. (See diagram). Figure 7 As shown. Therefore, while ensuring that the unlocking drive structure 11 can properly unlock the locking member 30, the blocking mechanism 30 can also solve the defect that the locking member 30 is accidentally unlocked by the unlocking drive structure 11 due to excessive adjustment of the locking member 30 to the last locking position 12 following the displacement bracket 20.

[0056] It should be noted that, in order to meet the requirement that the locking component 30 in the unlocking position moves to the first locking position 12 and locks with it, a corresponding reset drive structure 13 is also provided on the base 10, see... Figures 1 to 7 As shown; since the reset drive structure 13 is well known in the art, specifically the backrest displacement frame disclosed in Chinese Patent No. 201920156668.3, it will not be described again here.

[0057] The above-disclosed examples are merely preferred embodiments of the present utility model, intended to facilitate understanding and implementation by those skilled in the art. They should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application are still within the scope of the present utility model.

Claims

1. A furniture displacement frame, comprising a base, a displacement support, and a locking member, wherein the locking member is assembled to the displacement support and is movable between a locked position and an unlocked position, the displacement support is movably assembled to the base, and the base is provided with an unlocking drive structure and a plurality of locking positions arranged together in the moving direction of the displacement support and for the locking member in the locked position to unidirectionally lock. During the process of the locking member in the locked position moving to the last locking position and maintaining its original direction of movement, the unlocking drive structure drives the locking member to move from the locked position to the unlocked position, characterized in that... The furniture displacement frame further includes a blocking mechanism, which comprises a pivot member, a frame body assembled to one of the base and the displacement support, a blocking member assembled to the frame body and moved on the frame body by the displacement support at least when it moves to the last locking position, and a resetting member that provides a resetting force for the blocking member to reset. The pivot member has a pivot end pivotally connected to one of the blocking member and the frame body, and a swing end that pivots with the pivot end. The other of the blocking member and the frame body is provided with a first hook position, a second hook position, and an annular groove for accommodating the swing end. The annular groove guides the swing end to make unidirectional cyclic movement between the first hook position and the second hook position under the cooperation of the blocking member being driven to move and resetting. The swing end moves to the first hook position or the second hook position to block or disengage from the unlocking drive structure, causing the locking member to move from the locked position to the unlocked position. The swing end moves away from the first hook position or the second hook position during the resetting process of the blocking member.

2. The furniture displacement frame according to claim 1, characterized in that, The first hook position is located between the second hook position and the pivot end in the reset direction of the blocking member. The first hook position is also staggered from the pivot end and the second hook position in a vertical direction perpendicular to the reset direction of the blocking member. Both the first hook position and the second hook position are notches that communicate with the annular groove.

3. The furniture displacement frame according to claim 2, characterized in that, The annular groove includes a first extending section extending along the reset direction of the blocking member, a second extending section arranged vertically spaced from the first extending section and extending beyond the first extending section along both the reset direction of the blocking member and in the opposite direction, an inclined section inclined relative to the reset direction of the blocking member and connected to one end of both the first and second extending sections, and an intermediate connecting section connected to the other end of both the first and second extending sections; the intermediate connecting section and the first extending section form a first step to prevent the swinging end from moving backward from the intermediate connecting section to the first extending section, the second extending section and the inclined section form a second step to prevent the swinging end from moving backward from the inclined section to the second extending section, the side of the intermediate connecting section near the inclined section communicates with the first hook position, and the side of the intermediate connecting section away from the inclined section has an arched structure opposite to and arching towards the first hook position; the second hook position communicates with the end of the inclined section away from the first extending section.

4. The furniture displacement frame according to claim 3, characterized in that, The groove depths of the first extension section and the inclined section are arranged to increase progressively along the reset direction of the blocking member, while the groove depth of the second extension section is arranged to decrease progressively along the reset direction of the blocking member.

5. The furniture displacement frame according to claim 1, characterized in that, The blocking mechanism further includes a compression spring, and the pivot member also has a connecting end connected between the pivot end and the swing end. The first end of the compression spring abuts against the side of the connecting end facing away from the blocking member, and the opposite second end of the compression spring abuts against the position of the mechanism frame opposite to that side.

6. The furniture displacement frame according to claim 5, characterized in that, The frame of the mechanism has an embedding cavity for the second end of the compression spring to be embedded and fixed.

7. The furniture displacement frame according to claim 1, characterized in that, The blocking mechanism is arranged adjacent to the unlocking drive structure. The blocking member protrudes from the mechanism frame along its reset direction. The displacement bracket is provided with a pushing structure opposite to the blocking member.

8. The furniture displacement frame according to claim 1, characterized in that, The reset component is a reset spring. A column structure extending in the opposite direction to the reset direction of the blocking component is provided on the first side of the blocking component. The column structure and the position of the blocking component driven by the displacement bracket are arranged on opposite sides. The reset spring is fitted onto the column structure and also abuts against the blocking component and the mechanism frame.

9. The furniture displacement frame according to claim 8, characterized in that, The mechanism frame is provided with a buffer blocking rubber plug opposite to the first side of the blocking member. When the swing end moves to the second hook position, the buffer blocking rubber plug engages with the first side of the blocking member to block.

10. A sofa, comprising a seat and a backrest, characterized in that, The sofa further includes a furniture displacement frame according to any one of claims 1 to 9, wherein the base is fixed inside the seat and the backrest is fixed on the displacement frame.

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