An electrically adjustable support device

Abstract

The present invention discloses an electrically adjustable support device, which includes a base frame, a support plate, a first slider, and an electric drive mechanism. The support plate is rotatable relative to the base frame; it also includes a support assembly and a first power-assisting mechanism. The support assembly includes a support rod and a guide block connected to the base frame. The first end of the support rod is rotatably connected to the first slider, and the second end of the support rod is connected to a push member in contact with the support plate. The guide block has a guiding surface. The first power-assisting mechanism includes a first power-assisting arm assembly rotatably connected to the push member and a first support block connected in a slide groove. When the push member is lifted upward to a first position, the free end of the first power-assisting arm assembly abuts against the first support block, and when the push member continues to lift upward, the first power-assisting arm assembly provides power assistance to the support plate. The electrically adjustable support device is thin, small, and compact in its initial folded state, and has power-assisting support, large load capacity, and good support stability in its unfolded state.

Description

Technical Field

[0001] The present application relates to the technical field of electric furniture, and in particular to an electrically adjustable support device. Background Art

[0002] Electric beds in related technology can adjust the user's sleeping, lying, sitting and other postures, relieving fatigue, and are therefore very popular among users. In order to give ordinary beds in users' homes the same adjustable functions as electric beds, people install an electrically adjustable support device under the mattress of ordinary beds. This electrically adjustable support device, also known as a back-pushing bed frame, is a separately configured component. Users only need to place the purchased electrically adjustable support device on the bed frame under the mattress. By adjusting the height of the raised support device, the height of the softer mattress above the support device can be adjusted, thereby giving the ordinary bed mattress the height adjustment function.

[0003] The electrically adjustable support device of the related technology has a structure including a fixed frame and a backrest bracket, one end of the backrest bracket is rotatably connected to one end of the fixed frame by a rotating shaft, the fixed frame is horizontally placed on the bed frame of an ordinary bed, and the backrest bracket can be rotated around the rotating shaft relative to the fixed frame, so that the backrest bracket can be height-adjusted between an initial folded state and a final unfolded state; the electrically adjustable support device of the related technology also includes an electric push rod arranged between the fixed frame and the backrest bracket, and one end of the electric push rod is hinged to the fixed frame, and the other end of the electric push rod is hinged to the backrest bracket, which is used to drive the backrest bracket to rotate and support the load-bearing capacity of the backrest bracket, such as the back-push bed frame in the prior application of the applicant of this case with publication number CN115500645A.

[0004] The electrically adjustable support device of the related art has the following defects during actual use: first, in order to ensure that the electric push rod can provide sufficient lifting force to the backrest bracket when the backrest bracket is unfolded from the initial folded state, the electric push rod is tilted when the backrest bracket is in the initial folded state, or / and the backrest bracket is tilted relative to the fixed frame when it is in the initial folded state. Therefore, the support device is thicker, larger in volume, and less compact in structure after folding, which increases packaging and transportation costs; secondly, when the backrest bracket is unfolded under load, the rotational force of the backrest bracket load is converted solely by the axial thrust of the electric push rod, so the load of the support device of the related art is too small; in addition, after the backrest bracket is unfolded, the support of the backrest bracket is completely provided by the self-locking force of the electric push rod, and its support stability is poor. Summary of the Invention

[0005] The technical problem to be solved by this application is to overcome the defects of the above-mentioned related technologies and provide a support device that is thin in thickness, small in size, and compact in structure in the initial folded state, and has electric adjustment with assisted support, large load capacity, and good support stability in the unfolded state.

[0006] The technical solution of the present application is to provide an electrically adjustable support device having the following structure:

[0007] The base frame has a slide groove extending along the length thereof, and a rotation connection point is provided at the first end of the base frame;

[0008] a support plate, a first end of which is connected to the rotation connection point, for enabling the support plate to rotate about the rotation connection point to adjust the angle of the support plate relative to the base frame;

[0009] A first slider is slidably engaged with the slide groove.

[0010] an electric drive mechanism, in transmission connection with the first slider, for driving the first slider to slide back and forth along the length direction of the slide groove;

[0011] A support assembly comprising a support rod and a guide block connected to a base frame, wherein a first end of the support rod is rotatably connected to the first slider, and a second end of the support rod is connected to a push member that contacts the back surface of the support plate; the guide block has a guide surface, wherein the guide surface is configured to guide the push member to lift upward and cause the push member to drive the support plate to rotate when the electric drive mechanism drives the first slider to move toward a rotation connection point close to the base frame;

[0012] The first assist mechanism includes a first assist arm assembly rotatably connected to the pushing member and a first support block connected to the slide groove; when the pushing member is lifted upward to the first position, the free end of the first assist arm assembly abuts against the first support block, and when the pushing member continues to be lifted upward from the first position, the first assist arm assembly provides assistance for the rotation of the support plate.

[0013] In some embodiments, the support device also includes a second power-assisting mechanism, which includes a second power-assisting arm assembly rotatably connected to the pushing member and a second support block connected to the slide groove; the length of the second power-assisting arm assembly is greater than the length of the first power-assisting arm assembly, and the second support block is arranged at a position closer to the rotation connection point of the base frame relative to the first support block; when the pushing member is lifted upward to the second position, the free end of the second power-assisting arm assembly is abutted against the second support block, and when the pushing member continues to be lifted upward from the second position, the second power-assisting arm assembly provides assistance to the rotation of the support plate.

[0014] In some embodiments, the support device also includes a third power-assisting mechanism, which includes a third power-assisting arm assembly rotatably connected to the pushing member and a third support block connected in the slide groove; the length of the third power-assisting arm assembly is greater than the length of the second power-assisting arm assembly, and the third support block is arranged at a position closer to the rotation connection point of the base frame relative to the second support block; when the pushing member is lifted upward to the third position, the free end of the third power-assisting arm assembly is abutted against the third support block, and when the pushing member continues to be lifted upward from the third position, the third power-assisting arm assembly provides power for the rotation of the support plate until the support plate rotates to a maximum angle.

[0015] In some embodiments, a second slider is slidably fitted in the slide groove, and the free end of the third booster arm assembly is rotatably connected to the second slider; when the push member is lifted upward to the third position, the second slider is abutted against the third support block.

[0016] In some embodiments, the guide block has an inclined surface extending from low to high along a first direction of the slide groove, and the inclined surface forms the guide surface; wherein the first direction is the direction in which the first slider slides toward the rotation connection point of the base frame.

[0017] In some embodiments, when the pushing member moves through the guide surface to the highest point of the guide surface, the free end of the first booster arm assembly abuts against the first support block.

[0018] In some embodiments, when the free end of the second booster arm assembly abuts against the second support block, the assist provided by the first booster arm assembly to the rotation of the support plate disappears; and when the free end of the third booster arm assembly abuts against the third support block, the assist provided by the second booster arm assembly to the rotation of the support plate disappears.

[0019] In some embodiments, the electric drive mechanism includes a drive motor and a screw rod arranged along the length direction of the slide groove and capable of rotating. The first slider is threadedly connected to the screw rod, and the circumferential rotation of the first slider is limited by the slide groove; the drive motor is transmission-connected to the screw rod, and is used to drive the screw rod to rotate so that the first slider slides.

[0020] In some embodiments, the pushing member includes a main shaft connected to the second end of the support rod and a roller connected to the main shaft, and the outer edge of the roller is against the back of the support plate.

[0021] In some embodiments, the facing surfaces of the first support block and the second support block are both configured as concave arc surfaces, and the free ends of the first power-assisting arm assembly and the second power-assisting arm assembly are both configured as arc shapes.

[0022] In summary, the electrically adjustable support device of the present application has the following advantages compared with the related art:

[0023] When the electric drive mechanism of the electrically adjustable support device drives the first sliding block to move along the length direction of the slide groove toward the rotation connection point close to the base frame, the support rod moves synchronously with the first sliding block, and under the guidance of the guide surface of the guide block, the pushing member at the second end of the support rod is lifted upward on the guide surface. At this time, the guide surface of the guide block provides initial assistance to the lifting of the pushing member, and the second end of the support rod is tilted or tilted upward and causes the pushing member to drive the support plate to rotate, so that the angle of the support plate changes; when the pushing member is lifted upward to the first position, the free end of the first booster arm assembly is against the first support block. At this time, the position of the free end of the first booster arm assembly is restricted, and as the support rod continues to move, the pushing member causes the first booster arm assembly to rotate upward around the free end of the first booster arm assembly. Therefore, when the pushing member continues to be lifted upward from the first position, the first booster arm assembly provides assistance for the rotation of the support plate. When the support plate of the electrically adjustable support device rotates upward from an initial state, the guide surface of the guide block provides initial assistance, and when the push member continues to rise, the first assist arm assembly provides a first level of assistance for the rotation of the support plate. Therefore, the electrically adjustable support device can provide multi-level assistance for the rotation of the support plate, thereby increasing the load of the support device.

[0024] In addition, during the process of the support plate rotating and rising, the guide block and the first power-assisting arm assembly can provide support for the back of the support plate, so the support plate has power-assisting support and good support stability when it is unfolded.

[0025] Furthermore, the electrically adjustable support device adjusts the rotation angle of the support plate by sliding the first slider in the slide groove on the base frame to link the support rod movement, and avoids the second end of the support rod being connected to the support plate; when the support plate is in a folded state, the support rod is arranged parallel to the slide groove, and the support plate is not interfered with by the angle of the support rod in the folded state, so that when the support plate is in the folded state, the thickness between the support plate and the base frame is thin and the structure is compact, so that the packaging volume of the electrically adjustable support device is small and the packaging and transportation costs are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of an electrically adjustable support device according to some embodiments of the present application.

[0027] Figure 2 This is a schematic diagram of the assembly structure of an electrically adjustable support device according to some embodiments of the present application.

[0028] Figure 3 It is a schematic cross-sectional structural diagram of an electrically adjustable support device according to some embodiments of the present application.

[0029] Figure 4yes Figure 3 A magnified schematic diagram of part A in FIG.

[0030] Figure 5 This is a schematic diagram of the assembly structure of an electrically adjustable support device in which a push member is lifted to a first position according to some embodiments of the present application.

[0031] Figure 6 It is a schematic cross-sectional structural diagram of an electrically adjustable push member of a support device raised to a first position according to some embodiments of the present application.

[0032] Figure 7 This is a schematic diagram of the assembly structure of an electrically adjustable support device in which a push member is lifted to a second position according to some embodiments of the present application.

[0033] Figure 8 It is a schematic cross-sectional structural diagram of an electrically adjustable push member of a support device raised to a second position according to some embodiments of the present application.

[0034] Figure 9 This is a structural schematic diagram of an electrically adjustable support device raised to a third position according to some embodiments of the present application.

[0035] Figure 10 It is a schematic cross-sectional structural diagram of an electrically adjustable push member of a support device raised to a third position according to some embodiments of the present application.

[0036] Figure 11 This is a structural schematic diagram of an electrically adjustable support device raised to a highest position according to some embodiments of the present application.

[0037] Figure 12 It is a schematic cross-sectional structural diagram of an electrically adjustable support device raised to a highest position according to some embodiments of the present application.

[0038] Description of reference numerals:

[0039] 1. Support plate, 2. Base frame, 200, Slide groove, 201, Rotation connection point, 3. First slider, 300, Second slider, 301, Threaded hole, 4. Screw, 400, Bearing, 5. Support rod, 6. Push member, 600, Roller, 601, Spindle, 7. Guide block, 700, Guide surface, 8. First support block, 800, Second support block, 801, Third support block, 802, Concave arc surface, 9. First power-assist arm assembly, 900, Second power-assist arm assembly, 901, Third power-assist arm assembly. DETAILED DESCRIPTION

[0040] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0041] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0042] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] See also Figures 1 to 6 As shown;

[0045] An embodiment of the present application discloses an electrically adjustable support device, which is used for bed or sitting furniture, such as a bed frame placed under a soft mattress, the bottom of a soft sofa cushion, etc.; its structure includes a base frame 2, a support plate 1 and an electric drive mechanism, the base frame 2 is arranged horizontally, and the base frame 2 has a slide groove 200 extending along its length direction, and the first end of the base frame 2 is provided with a rotating connection point 201; the support plate 1 is arranged above the base frame 2, and the first end of the support plate 1 is connected to the rotating connection point 201, so that the support plate 1 can rotate around the rotating connection point 201 to adjust the angle of the support plate 1 relative to the base frame 2; the rotating connection point 201 of this embodiment can be a rotating shaft, a hinge pin, a rotating joint, etc., which is used to connect the support plate 1 and the base frame 2, and make the angle of the support plate 1 relative to the base frame 2 rotatable and adjustable; the support plate 1 is directly in contact with the bottom of the mattress or cushion, and when the support plate 1 rotates relative to the base frame 2, it can drive the mattress or cushion to rotate synchronously.

[0046] In this embodiment, if Figure 2As shown, a first slider 3 is slidably fitted on the slide 200, and an electric drive mechanism is transmission-connected to the first slider 3 for driving the first slider 3 to slide back and forth along the length direction of the slide 200; specifically, the electric drive mechanism can be a linear motor, a push rod motor, or other linear drive mechanisms; but in this embodiment, the electric drive mechanism includes a drive motor (not shown in the figure) and a screw rod 4 which is arranged along the length direction of the slide 200 and can rotate. The screw rod 4 is rotatably connected to the slide 200 through a bearing 400, and the threaded hole 301 on the first slider 3 is threadedly connected to the screw rod 4, and the circumferential rotation of the first slider 3 is limited by the slide 200; the drive motor is transmission-connected to the screw rod 4 for driving the screw rod 4 to rotate and make the first slider 3 slide. To ensure smoother sliding of the first slider 3 and minimize friction with the chute 200, an outwardly protruding rib is provided on the outer sidewall of the first slider 3. The rib's length aligns with the sliding direction of the first slider 3. The rib reduces the contact area between the first slider 3 and the chute 200, thereby ensuring smoother and quieter sliding of the first slider 3. In this embodiment, the drive motor is located outside the base frame 2 and mounted at one end of the base frame 2.

[0047] In this embodiment, the electrically adjustable support device further includes a support assembly and a first power-assisting mechanism, such as Figure 2 As shown, the support assembly includes a support rod 5 and a guide block 7 connected to the base frame 2, the first end of the support rod 5 is rotatably connected to the first slider 3, and the second end of the support rod 5 is connected to a push piece 6 in contact with the back of the support plate 1; the guide block 7 has a guide surface 700, wherein the guide surface 700 is configured to guide the push piece 6 to lift upward and drive the support plate 1 to rotate when the electric drive mechanism drives the first slider 3 to move toward the rotation connection point 201 close to the base frame 2; when the first slider 3 drives the support rod 5 to move synchronously, due to the setting of the guide block 7, the push piece 6 at the second end of the support rod 5 can be lifted upward along the guide surface 700, so that the second end of the support rod 5 is tilted upward. The first assist mechanism includes a first assist arm assembly 9 rotatably connected to the pushing member 6 and a first support block 8 connected to the slide groove 200. When the pushing member 6 is lifted upward to the first position, the free end of the first assist arm assembly 9 abuts against the first support block 8. Specifically, in this embodiment, when the pushing member 6 moves along the guide surface 700 to the highest point of the guide surface 700, the free end of the first assist arm assembly 9 abuts against the first support block 8. When the pushing member 6 continues to lift upward from the first position, the first assist arm assembly 9 provides assistance for the rotation of the support plate 1.

[0048] It is readily understood that, in this embodiment, when the support plate 1 is in its lowest folded or horizontal position, the guide block 7 is located in front of and aligned with the push member 6. The guide surface 700 of the guide block 7, i.e., the guide block 7 has an inclined surface extending from low to high along a first direction of the chute 200, forming the guide surface 700. The first direction is the direction in which the first slider 3 slides toward the rotational connection point 201 of the base frame 2. When the push member 6 is in its initial position, the support rod 5 is parallel to the chute 200, and the push member 6 is located at the lower position of the guide surface 700.

[0049] See also Figure 5 and Figure 6 As shown, in this embodiment, when the electric drive mechanism drives the first slider 3 to move along the length direction of the slide groove 200 toward the rotation connection point 201 close to the base frame 2, the support rod 5 moves synchronously with the first slider 3, and under the guidance of the guide surface 700 of the guide block 7, the pushing member 6 at the second end of the support rod 5 is lifted upward on the guide surface 700. At this time, the guide surface 700 of the guide block 7 provides initial assistance to the lifting of the pushing member 6, and the second end of the support rod 5 tilts or tilts upward and causes the pushing member 6 to drive the support plate 1 to rotate, so that the angle of the support plate 1 changes; when the pushing member 6 is lifted upward to the first position, the free end of the first booster arm assembly 9 is against the first support block 8. At this time, the position of the free end of the first booster arm assembly 9 is restricted. As the support rod 5 continues to move, the pushing member 6 causes the first booster arm assembly 9 to rotate upward around the free end of the first booster arm assembly 9. Therefore, when the pushing member 6 continues to lift upward from the first position, the first booster arm assembly 9 provides assistance for the rotation of the support plate 1. When the support plate 1 of the electrically adjustable support device rotates upward from the initial state, the guide surface 700 of the guide block 7 provides initial assistance, and when the push member 6 continues to rise, the first assist arm assembly 9 provides a first level of assistance for the rotation of the support plate 1. Therefore, the electrically adjustable support device can provide multi-level assistance for the rotation of the support plate 1, thereby increasing the load of the support device.

[0050] In this embodiment, if Figure 6 As shown, during the process of the support plate 1 rotating and rising, the guide block 7 and the first power-assisting arm assembly 9 can provide support for the back of the support plate 1, so the support plate 1 has power-assisting support and good support stability in the unfolded state.

[0051] See again Figure 3In the state shown, the electrically adjustable support device adjusts the rotation angle of the support plate 1 by sliding the first slider 3 in the slide groove 200 on the base frame 2 to link the support rod 5, and avoids the second end of the support rod 5 from being connected to the support plate 1; when the support plate 1 is in the folded state, the support rod 5 is arranged parallel to the slide groove 200, and the support plate 1 is not interfered with by the angle of the support rod 5 in the folded state, so that when the support plate 1 is in the folded state, the thickness between the support plate 1 and the base frame 2 is thin and the structure is compact, so that the packaging volume of the electrically adjustable support device is small and the packaging and transportation costs are low.

[0052] In some embodiments, as Figure 7 and Figure 8 As shown, the support device also includes a second power-assisting mechanism, which includes a second power-assisting arm assembly 900 rotatably connected to the pushing member 6 and a second support block 800 connected to the slide groove 200; the length of the second power-assisting arm assembly 900 is greater than the length of the first power-assisting arm assembly 9, and the second support block 800 is arranged at a position closer to the rotation connection point 201 of the base frame 2 relative to the first support block 8; when the pushing member 6 is lifted upward from the first position to the second position, the free end of the second power-assisting arm assembly 900 is abutted against the second support block 800, and when the pushing member 6 continues to be lifted upward from the second position, the support rod 5 drives the second power-assisting arm assembly 900 to rotate around its free end or lower end through the pushing member 6, and the second power-assisting arm assembly 900 provides secondary power assistance for the rotation of the support plate 1. In this embodiment, when the free end of the second booster arm assembly 900 abuts against the second support block 800, the assisting force provided by the first booster arm assembly 9 to the rotation of the support plate 1 disappears; at this time, the second booster arm assembly 900 provides support for the back of the support plate 1; therefore, the assisting force provided by the first booster arm assembly 9 to the support plate 1 and the assisting force provided by the second booster arm assembly 900 to the support plate 1 are continuous and uninterrupted, thereby making the rotation of the support plate 1 more stable.

[0053] In some embodiments, as Figure 9 and Figure 10As shown, the support device also includes a third power-assisting mechanism, which includes a third power-assisting arm assembly 901 rotatably connected to the pushing member 6 and a third support block 801 connected to the slide groove 200; the length of the third power-assisting arm assembly 901 is greater than the length of the second power-assisting arm assembly 900, and the third support block 801 is arranged at a position closer to the rotation connection point 201 of the base frame 2 relative to the second support block 800; when the pushing member 6 is lifted upward from the second position to the third position, the free end of the third power-assisting arm assembly 901 is against the third support block 801, and when the pushing member 6 continues to be lifted upward from the third position, the support rod 5 drives the third power-assisting arm assembly 901 to rotate around its free end or lower end through the pushing member 6, and the third power-assisting arm assembly 901 provides three levels of power assistance to the rotation of the support plate 1 until the support plate 1 rotates to the maximum angle. And in this embodiment, as Figure 10 In the state shown, when the free end of the third booster arm assembly 901 abuts against the third support block 801, the assist provided by the second booster arm assembly 900 to the rotation of the support plate 1 disappears. At this time, the third booster arm assembly 901 provides support for the back of the support plate 1; therefore, the assist provided by the second booster arm assembly 900 to the support plate 1 and the third booster arm assembly 901 to the support plate 1 are continuous and uninterrupted, thereby making the rotation of the support plate 1 more stable.

[0054] In this embodiment, the first position, second position, third position and the position of the pushing member 6 when the support plate 1 is rotated to the maximum angle all refer to the height position of the pushing member 6 relative to the base frame 2, or the different positions of the support plate 1 relative to the base frame 2, and the height of the second position is greater than the height of the first position, the height of the third position is greater than the height of the second position, and the height of the position of the pushing member 6 when the support plate 1 is rotated to the maximum angle is greater than the height of the third position. Therefore, when the support plate 1 of the electrically adjustable support device is lifted from the lowest position to the first position, the guide provides initial assistance to the rotation of the support plate 1; when the support plate 1 is lifted from the first position to the second position, the first assist arm assembly 9 provides a first-level assistance to the rotation of the support plate 1; when the support plate 1 is lifted from the second position to the third position, the second assist arm assembly 900 provides a second-level assistance to the rotation of the support plate 1; when the support plate 1 is lifted from the third position to the maximum height position, the third assist arm assembly 901 provides a third-level assistance to the rotation of the support plate 1; and the various levels of assistance are continuous with each other, so the electrically adjustable support device increases the load of the support plate 1, and the support stability is good during the entire deployment process of the support plate 1.

[0055] It is not difficult to understand that in this embodiment, the rotational connection between the first booster arm assembly 9, the second booster arm assembly 900 and the third booster arm assembly 901 and the pushing member 6 is a free rotational connection, that is, as the pushing member 6 is lifted, each booster arm assembly will droop due to its own weight; or in other embodiments, the rotation angle of the first booster arm assembly 9, the second booster arm assembly 900 and the third booster arm assembly 901 can also be set to adapt to the abutment with each support block.

[0056] Specifically, elastic components may be provided between the first booster arm assembly 9, the second booster arm assembly 900, the third booster arm assembly 901 and the pushing member 6, and the elastic components may enable each booster arm assembly to have a tendency to rotate from a horizontal direction to a vertical downward direction; further, when each booster arm assembly is in a horizontal direction, the corresponding elastic component has elastic potential energy, and when each booster arm assembly is in a vertical direction, the elastic potential energy of the corresponding elastic component disappears, wherein the two ends of the elastic component are respectively connected to the booster arm assembly and the pushing member 6; preferably, the elastic component is a torsion spring, one end of the torsion spring is clamped to each booster arm assembly, and the other end is clamped to the pushing member 6.

[0057] In some embodiments, see Figure 3 、 Figure 6 、 Figure 8 、 Figure 10 and Figure 12 As shown, a second slider 300 is slidably engaged within the chute 200, and the free end of the third booster arm assembly 901 is rotatably connected to the second slider 300. When the push member 6 is lifted upward to the third position, the second slider 300 abuts against the third support block 801. The second slider 300 slidably engages with the chute 200 and slides in conjunction with the movement of the third booster arm assembly 901. The provision of the second slider 300 guides the third booster arm assembly 901 and prevents it from disengaging from the chute 200 of the base frame 2, resulting in improved structural stability and safety.

[0058] In some embodiments, as Figure 2 As shown, the pushing member 6 includes a main shaft 601 connected to the second end of the support rod 5 and a roller 600 connected to the main shaft 601, and the outer edge of the roller 600 is against the back of the support plate 1. When the roller 600 of the pushing member 6 pushes the support plate 1 to rotate, the roller 600 can roll on the back of the support plate 1 to reduce friction; in this embodiment, the first booster arm assembly 9, the second booster arm assembly 900 and the third booster arm assembly 901 are all rotatably connected to the main shaft 601. Moreover, the first booster arm assembly 9 includes two first booster arms respectively located on both sides of the roller 600, and the second booster arm assembly 900 includes two second booster arms respectively located on both sides of the first booster arm, and the third booster arm assembly 901 is an integral sheet metal component.

[0059] In some embodiments, as Figure 5 As shown, the facing surfaces of the first support block 8 and the second support block 800 are both configured as concave arc surfaces 802, and the free ends of the first and second power-assisting arm assemblies 9 and 900 are both configured as arc-shaped. This configuration not only stabilizes the contact between the free ends of the first and second power-assisting arm assemblies 9 and 900 and the support blocks, but also facilitates the rotation of the free ends of the first and second power-assisting arm assemblies 9 and 900, making them more flexible.

[0060] See again Figure 11 and Figure 12 As shown, the Figure 11 and Figure 12 The state shown is the state in which the third boosting arm assembly provides assisting force, at which time the first boosting arm assembly 9 and the second boosting arm assembly 900 are separated from the first support block 8 and the second support block 800 respectively.

[0061] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0062] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0063] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An electrically adjustable support device, characterized in that: It includes The base frame has a slide groove extending along the length thereof, and a rotation connection point is provided at the first end of the base frame; a support plate, a first end of which is connected to the rotation connection point, for enabling the support plate to rotate about the rotation connection point to adjust the angle of the support plate relative to the base frame; A first slider is slidably engaged with the slide groove. an electric drive mechanism, in transmission connection with the first slider, for driving the first slider to slide back and forth along the length direction of the slide groove; A support assembly comprising a support rod and a guide block connected to a base frame, wherein a first end of the support rod is rotatably connected to the first slider, and a second end of the support rod is connected to a push member that contacts the back surface of the support plate; the guide block has a guide surface, wherein the guide surface is configured to guide the push member to lift upward and cause the push member to drive the support plate to rotate when the electric drive mechanism drives the first slider to move toward a rotation connection point close to the base frame; The first assist mechanism includes a first assist arm assembly rotatably connected to the pushing member and a first support block connected to the slide groove; when the pushing member is lifted upward to the first position, the free end of the first assist arm assembly abuts against the first support block, and when the pushing member continues to be lifted upward from the first position, the first assist arm assembly provides assistance for the rotation of the support plate.

2. The electrically adjustable support device according to claim 1, characterized in that: The supporting device also includes a second power-assisting mechanism, which includes a second power-assisting arm assembly rotatably connected to the pushing member and a second support block connected to the slide groove; the length of the second power-assisting arm assembly is greater than the length of the first power-assisting arm assembly, and the second support block is arranged at a position closer to the rotation connection point of the base frame relative to the first support block; when the pushing member is lifted upward to the second position, the free end of the second power-assisting arm assembly is abutted against the second support block, and when the pushing member continues to be lifted upward from the second position, the second power-assisting arm assembly provides assistance to the rotation of the support plate.

3. The electrically adjustable support device according to claim 2, characterized in that: The supporting device also includes a third power-assisting mechanism, which includes a third power-assisting arm assembly rotatably connected to the pushing member and a third support block connected to the slide groove; the length of the third power-assisting arm assembly is greater than the length of the second power-assisting arm assembly, and the third support block is arranged at a position closer to the rotation connection point of the base frame relative to the second support block; when the pushing member is lifted upward to the third position, the free end of the third power-assisting arm assembly is abutted against the third support block, and when the pushing member continues to be lifted upward from the third position, the third power-assisting arm assembly provides power for the rotation of the support plate until the support plate rotates to the maximum angle.

4. The electrically adjustable support device according to claim 3, characterized in that: A second slider is slidably fitted in the slide groove, and the free end of the third booster arm assembly is rotatably connected to the second slider; when the push member is lifted upward to the third position, the second slider abuts against the third support block.

5. The electrically adjustable support device according to claim 1, characterized in that: The guide block has an inclined surface from low to high along a first direction of the slide groove, and the inclined surface forms the guide surface; wherein the first direction is the direction in which the first sliding block slides toward the rotation connection point of the base frame.

6. The electrically adjustable support device according to claim 5, characterized in that: When the pushing member moves through the guide surface to the highest point of the guide surface, the free end of the first booster arm assembly abuts against the first support block.

7. The electrically adjustable support device according to claim 3, characterized in that: When the free end of the second booster arm assembly abuts against the second support block, the assist provided by the first booster arm assembly to the rotation of the support plate disappears; and when the free end of the third booster arm assembly abuts against the third support block, the assist provided by the second booster arm assembly to the rotation of the support plate disappears.

8. The electrically adjustable support device according to claim 1, characterized in that: The electric drive mechanism includes a drive motor and a screw rod arranged along the length direction of the slide groove and capable of rotating. The first slider is threadedly connected to the screw rod, and the circumferential rotation of the first slider is limited by the slide groove; the drive motor is transmission-connected to the screw rod, and is used to drive the screw rod to rotate so that the first slider slides.

9. The electrically adjustable support device according to claim 1, characterized in that: The pushing member includes a main shaft connected to the second end of the support rod and a roller connected to the main shaft, and the outer edge of the roller is against the back surface of the support plate.

10. The electrically adjustable support device according to claim 2, characterized in that: The facing surfaces of the first support block and the second support block are both configured as inwardly concave arc surfaces, and the free ends of the first power-assisting arm assembly and the second power-assisting arm assembly are both configured as arc shapes.

Images