High-stability double-position split type bottom connecting rod

Abstract

The utility model provides a high-stability double-position split type bottom connecting rod, which solves the problems of insufficient strength and the like of an electric sofa supporting structure, and comprises a driving motor, the driving motor is in transmission connection with a driving block through a driving screw rod, the driving block is arranged on a driving guide rail in a sliding manner, and a driving connecting rod assembly is connected between the driving block and a sofa backrest. A gear rack assembly is mounted between the driving block and the driving guide rail, a translation assembly is mounted between the gear rack assembly and the sofa cushion, and a linkage reinforcing assembly is arranged between the translation assembly and the driving connecting rod assembly. The adjusting device has the advantages of stable structure, strong adjusting effect and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of sofa adjustment, and in particular relates to a high-stability double-seat split bottom connecting rod. Background Art

[0002] In the application of home sofa backrests, the application of its electric drive mechanism must take into account the function and space layout issues, because the electric backrest mechanism and the leg support connecting rod share a motor for driving, and the motor is arranged under the seat frame, which is easily impacted by the user in daily use, so a hard seat cushion is needed to protect the motor. The user's comfort and the functional requirements of independent adjustment of the backrest are not fully considered, so that the traditional electric sofa has the problem of being too hard for comfort after the user uses it for a certain period of time. In addition, the conventional sofa drive mechanism has the problem of insufficient structural strength. After the angle adjustment is completed, it cannot provide sufficient supporting torque, resulting in the detachment of its movable connection.

[0003] In order to solve the deficiencies of the prior art, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a chair frame of an electric sofa [201811091067.5], wherein a base assembly is connected to a bottom frame, and an extension mechanism is provided on the left and right sides of the bottom frame, and a driving device is provided on the bottom frame, and the driving device is connected to the extension mechanism to drive the extension mechanism to extend and retract, and a swing mechanism is also provided on the base assembly, and the swing mechanism is provided on the inner side of the extension mechanism, and the swing mechanism includes an intermediate rod, and a first connecting rod is provided on the left and right sides of the intermediate rod, and a mounting plate is provided on the first connecting rod, and the lower end of the mounting plate is fixed to the base assembly, and the front and rear ends of the outer side of the mounting plate are respectively hinged with a first swing plate and a second swing plate, and the first swing plate and the second swing plate are connected by an intermediate plate, and the mechanism composed of the first swing plate, the second swing plate and the intermediate plate swings around the mounting plate and the connection between the first swing plate and the second swing plate to swing the chair frame forward and backward.

[0004] The above solution solves the problem of adjusting the comfort of the electric sofa to a certain extent, but the solution still has many shortcomings, such as insufficient strength of the supporting structure. Summary of the invention

[0005] The utility model aims to solve the above problems and provide a high-stability double-position split bottom link with reasonable design and stable supporting structure.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a high-stability two-person split bottom connecting rod, including a driving motor, which is connected to a driving block through a driving screw transmission, the driving block is slidably installed on a driving guide rail, a driving connecting rod assembly is connected between the driving block and the sofa backrest, a gear rack assembly is installed between the driving block and the driving guide rail, a translation assembly is installed between the gear rack assembly and the sofa cushion, and a linkage reinforcement assembly is arranged between the translation assembly and the driving connecting rod assembly.

[0007] In the above-mentioned high-stability two-person split bottom connecting rod, the driving motor is arranged under the sofa cushion, the driving screw is arranged horizontally, the driving block is long and arranged vertically relative to the driving screw, and a threaded barrel connected to the driving screw threaded transmission is installed in the middle of the driving block.

[0008] In the above-mentioned high-stability two-person split bottom link, the driving guide rails are symmetrically arranged and slidably connected to the two ends of the driving block, and a displacement sensor is installed between the driving block and the driving guide rails.

[0009] In the above-mentioned high-stability two-person split bottom connecting rod, the driving connecting rod assembly includes a supporting connecting rod rotatably connected to the driving block, the upper end of the supporting connecting rod is hinged with a back panel fixedly connected to the sofa backrest, the middle part of the supporting connecting rod is hinged with a supporting auxiliary rod, and the lower end of the supporting auxiliary rod is slidably connected to the driving guide rail through a locking block.

[0010] In the above-mentioned high-stability two-person split bottom link, an electromagnetic switch is installed on the locking block, and locking holes for inserting the telescopic ends of the electromagnetic switches are arranged along the axial direction of the driving guide rail.

[0011] In the above-mentioned high-stability two-person split bottom connecting rod, the gear rack assembly includes an active rack fixed on one side of the driving block, and a speed change gear set that meshes with the active rack and is rotatably installed on the side of the driving guide rail is meshed with the driven rack slidably installed on the driving guide rail.

[0012] In the above-mentioned high-stability two-person split bottom link, the translation assembly includes a translation plate connected to the driven rack and installed at the lower end of the sofa cushion, and a support frame with support rollers is installed between the translation plate and the driving guide rail.

[0013] In the above-mentioned high-stability two-person split bottom link, the linkage reinforcement assembly includes a telescopic rod rotatably connected between the translation assembly and the driving link assembly, the telescopic rods are parallel to each other and have built-in elastic elements and pressure sensors.

[0014] In the above-mentioned high-stability two-person split bottom link, the driving guide rail is installed in the limit frame, and the limit vertical rods are installed at the corners of the limit frame.

[0015] In the above-mentioned high-stability two-person split bottom link, the driving motor is a servo motor.

[0016] Compared with the existing technology, the advantages of the utility model are: the driving connecting rod assembly and the gear rack assembly drive the sofa backrest and seat cushion to fold, and the linkage reinforcement assembly further improves its movement stability to ensure the overall support structure strength; the driving motor adopts a servo motor, which cooperates with the corresponding sensor to realize feedback adjustment, thereby ensuring the adjustment accuracy; the linkage reinforcement assembly has multiple telescopic rods, in which the elastic element plays a damping and buffering role to ensure comfort during the adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0019] Figure 3 It is a structural schematic diagram of another perspective of the utility model;

[0020] In the figure, driving motor 1, driving screw 2, driving block 3, threaded cylinder 31, driving guide rail 4, driving connecting rod assembly 5, supporting connecting rod 51, back plate 52, supporting sub-rod 53, locking block 54, electromagnetic switch 55, locking hole 56, gear rack assembly 6, active rack 61, speed change gear set 62, driven rack 63, translation assembly 7, translation plate 71, support frame 72, linkage reinforcement assembly 8, telescopic rod 81, limit frame 9, limit vertical rod 91. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1-3 As shown, a high-stability two-person split bottom link includes a driving motor 1 hidden at the bottom of the sofa. The output end of the driving motor 1 is provided with a speed change structure and is connected to a driving block 3 through a driving screw 2. The driving block 3 is slidably mounted on a driving guide rail 4, and the driving block 3 slides axially along the driving guide rail 4. A driving connecting rod assembly 5 is connected between the driving block 3 and the sofa backrest for supporting linkage. A gear rack assembly 6 is installed between the driving block 3 and the driving guide rail 4. A translation assembly 7 is installed between the gear rack assembly 6 and the sofa cushion. The sofa cushion and the sofa backrest are synchronously linked to adjust their angles. A linkage reinforcement assembly 8 is provided between the translation assembly 7 and the driving connecting rod assembly 5 for damping and buffering.

[0023] Specifically, the driving motor 1 is arranged under the sofa cushion to provide driving torque, the driving screw 2 is arranged horizontally and extends along the sliding direction of the sofa cushion, the driving block 3 is in the shape of a long strip and arranged vertically relative to the driving screw 2, and a threaded barrel 31 connected to the driving screw 2 is installed in the middle of the driving block 3. The threaded barrel 31 drives the driving block 3 to translate under the drive of the driving screw 2.

[0024] Specifically, the driving rails 4 are symmetrically arranged and slidably connected to both ends of the driving block 3, and a displacement sensor is installed between the driving block 3 and the driving rails 4. The driving rails 4 are fixed to the sofa base, and the displacement sensor senses the sliding distance of the driving block 3, thereby detecting and judging the folding angle of the sofa backrest and the sliding distance of the sofa cushion.

[0025] Furthermore, similar to a conventional connecting rod structure, the driving connecting rod assembly 5 in the present application also includes a supporting connecting rod 51 rotatably connected to the driving block 3, and the upper end of the supporting connecting rod 51 is hinged with a back panel 52 fixedly connected to the sofa backrest. The difference is that a supporting sub-rod 53 is hinged at the middle part of the supporting connecting rod 51, and the lower end of the supporting sub-rod 53 is slidably connected to the driving guide rail 4 through a locking block 54. The supporting sub-rod 53 provides additional supporting force for the supporting sub-rod 53 without affecting the activity space of the sofa back.

[0026] Furthermore, an electromagnetic switch 55 is mounted on the locking block 54, and a locking hole 56 is arranged along the axial direction of the driving guide rail 4 for inserting the telescopic end of the electromagnetic switch 55. Under normal conditions, the electromagnetic switch 55 and the locking hole 56 are plugged and locked. When the driving motor 1 is started, the electromagnetic switch 55 is started synchronously, and the locking hole 56 and the electromagnetic switch 55 are unlocked accordingly.

[0027] In addition, the gear rack assembly 6 includes an active rack 61 fixed to one side of the driving block 3, a speed change gear set 62 meshing with the active rack 61 is rotatably mounted on the side of the driving guide rail 4, and the speed change gear set 62 meshes with a driven rack 63 slidably mounted on the driving guide rail 4. The moving directions of the active rack 61 and the driven rack 63 are opposite.

[0028] At the same time, in order to ensure that the sofa cushion can be assembled normally, the translation assembly 7 includes a translation plate 71 connected to the driven rack 63 and installed at the lower end of the sofa cushion. The translation plate 71 is partially kept in a suspended state, and a support frame 72 with supporting rollers is installed between the translation plate 71 and the driving guide rail 4 to support the suspended part of the translation plate 71.

[0029] It can be seen that the linkage reinforcement assembly 8 as a whole always maintains a horizontal state, specifically including a telescopic rod 81 that is rotatably connected between the translation assembly 7 and the driving link assembly 5, and the telescopic rods 81 are parallel to each other and have built-in elastic elements and pressure sensors. The telescopic rod 81 provides a damping buffer torque when the driving link assembly 5 is flipped, mainly to reduce the impact when the sofa backrest is transformed from an inclined state to a vertical state.

[0030] Obviously, the driving guide rail 4 is installed in the limit frame 9, and the limit poles 91 are installed at the corners of the limit frame 9. The limit poles 91 lift the limit frame 9 and keep it isolated from the ground. According to actual needs, a vibration reduction structure can be set at the lower end of the limit pole 91 to reduce working noise.

[0031] Preferably, the driving motor 1 is a servo motor to accurately control the transmission speed of the driving screw 2 and the movement amount of the driving block 3.

[0032] To sum up, the principle of this embodiment is that the driving motor 1 drives the driving block 3 to slide, and the driving connecting rod assembly 5 and the gear rack assembly 6 connected thereto are synchronously transmitted, thereby driving the sofa backrest and seat cushion to flip or slide, and during the movement, there is a linkage reinforcement assembly 8 for damping and buffering to ensure its adjustment stability.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0034] Although this article uses more terms such as driving motor 1, driving screw 2, driving block 3, threaded barrel 31, driving guide rail 4, driving connecting rod assembly 5, supporting connecting rod 51, back plate 52, supporting auxiliary rod 53, locking block 54, electromagnetic switch 55, locking hole 56, gear rack assembly 6, active rack 61, speed change gear set 62, driven rack 63, translation assembly 7, translation plate 71, support frame 72, linkage reinforcement assembly 8, telescopic rod 81, limit frame 9, limit vertical rod 91, etc., it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A high-stability two-person split bottom connecting rod, comprising a driving motor (1), wherein the driving motor (1) is connected to a driving block (3) via a driving screw (2), characterized in that: The driving block (3) is slidably mounted on the driving guide rail (4); a driving connecting rod assembly (5) is connected between the driving block (3) and the sofa backrest; a gear rack assembly (6) is installed between the driving block (3) and the driving guide rail (4); a translation assembly (7) is installed between the gear rack assembly (6) and the sofa cushion; and a linkage reinforcement assembly (8) is provided between the translation assembly (7) and the driving connecting rod assembly (5).

2. The high stability two-person split bottom link according to claim 1, characterized in that: The driving motor (1) is arranged below the sofa cushion, the driving screw (2) is arranged horizontally, the driving block (3) is in the shape of an elongated strip and is arranged vertically relative to the driving screw (2), and a threaded barrel (31) is installed in the middle of the driving block (3) and is threadedly connected to the driving screw (2).

3. The high stability two-person split bottom link according to claim 2, characterized in that: The driving guide rails (4) are symmetrically arranged and slidably connected to the two ends of the driving block (3); a displacement sensor is installed between the driving block (3) and the driving guide rails (4).

4. The high stability two-person split bottom link according to claim 2, characterized in that: The driving connecting rod assembly (5) comprises a supporting connecting rod (51) rotatably connected to the driving block (3); the upper end of the supporting connecting rod (51) is hingedly connected to a back plate (52) fixedly connected to a sofa backrest; the middle part of the supporting connecting rod (51) is hingedly connected to a supporting auxiliary rod (53); the lower end of the supporting auxiliary rod (53) is slidably connected to the driving guide rail (4) via a locking block (54).

5. The high stability two-person split bottom link according to claim 4, characterized in that: The locking block (54) is provided with an electromagnetic switch (55), and the driving guide rail (4) is provided with locking holes (56) arranged along the axial direction for inserting the telescopic end of the electromagnetic switch (55).

6. The high stability two-person split bottom link according to claim 1, characterized in that: The gear rack assembly (6) comprises an active rack (61) fixed to one side of the driving block (3); a speed change gear set (62) which meshes with the active rack (61) and is rotatably mounted on the side of the driving guide rail (4); and the speed change gear set (62) meshes with a driven rack (63) which is slidably mounted on the driving guide rail (4) for transmission.

7. The high stability two-person split bottom link according to claim 6, characterized in that: The translation assembly (7) comprises a translation plate (71) connected to a driven rack (63) and installed at the lower end of the sofa cushion, and a support frame (72) with supporting rollers is installed between the translation plate (71) and the driving guide rail (4).

8. The high stability two-person split bottom link according to claim 1, characterized in that: The linkage reinforcement assembly (8) comprises a telescopic rod (81) rotatably connected between the translation assembly (7) and the driving connecting rod assembly (5); the telescopic rods (81) are parallel to each other and have built-in elastic elements and pressure sensors.

9. The high stability two-person split bottom link according to claim 1, characterized in that: The driving guide rail (4) is installed in a limiting frame (9), and limiting vertical rods (91) are installed at the corners of the limiting frame (9).

10. The high stability two-person split bottom link according to claim 1, characterized in that: The driving motor (1) is a servo motor.

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