Electric lifting seat

Abstract

The utility model discloses an electric lifting seat, which belongs to the technical field of seats, and comprises a support assembly, a seat frame arranged on the support assembly, and a lifting adjusting mechanism arranged between the seat frame and the support assembly, the lifting adjusting mechanism comprises a driving motor fixedly arranged on the seat frame; the fixed sleeve is fixedly arranged on the supporting assembly; the transmission lead screw comprises a threaded section and a connecting structure arranged at one end of the threaded section, the connecting structure is arranged in the seat frame, and the threaded section penetrates through the seat frame, extends into the fixing sleeve and is in threaded transmission fit with the fixing sleeve; the connecting structure is configured to be fixed to the seat frame in the axial direction of the transmission lead screw and rotationally matched with the seat frame in the circumferential direction of the transmission lead screw, and an output shaft of the driving motor is connected with the connecting structure and drives the transmission lead screw to ascend and descend through the connecting structure so as to drive the seat frame to ascend and descend. According to the invention, the height adjusting range of the seat can be increased, and the use requirements of users can be better met.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to an electric lifting seat. Background Art

[0002] Currently, most office chairs, study chairs, gaming chairs, and other chairs on the market have a lift function. This is typically achieved by using a pneumatic rod to adjust the seat frame, which poses a safety risk of explosion. Furthermore, the user must manually unlock the pneumatic rod by pulling a lever, then press down on the seat frame to overcome the upward force exerted by the pneumatic rod, lowering the seat frame. Once the downward pressure is less than the upward force exerted by the pneumatic rod, the seat frame can be raised. This operation is particularly challenging for children, especially when lowering the seat, as children, due to their weight and limited strength, struggle to exert sufficient downward pressure on the seat frame. A small number of existing chairs utilize electrically adjustable seat frame lifts, driven by a motor and a screw-nut transmission mechanism. However, the motor in these electrically adjustable chairs is currently located on the seat's bottom support structure, occupying the length of the screw rod. This results in a limited range of seat frame height adjustment. This makes it difficult for children in their growth and developmental stages to meet the needs of different age groups, often requiring multiple purchases based on age. Utility Model Content

[0003] The purpose of the utility model is to provide an electric lift seat, which can adjust the height of the seat frame within a relatively large range.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An electric lift seat includes a support assembly, a seat frame disposed on the support assembly, and a lift adjustment mechanism disposed between the seat frame and the support assembly, wherein the lift adjustment mechanism includes:

[0006] A driving motor is fixedly mounted on the seat frame;

[0007] a fixed sleeve, which is fixedly mounted on the support assembly; and

[0008] A transmission screw, comprising a threaded section and a connecting structure provided at one end of the threaded section, the connecting structure being provided in the seat frame, the threaded section passing through the seat frame and extending into the fixed sleeve and being threadedly engaged with the fixed sleeve;

[0009] Among them, the connecting structure is configured to be fixed to the seat frame along the axial direction of the transmission screw and to rotate with the seat frame along the circumferential direction of the transmission screw. The output shaft of the drive motor is connected to the connecting structure and drives the transmission screw to rise and fall through the connecting structure, thereby driving the seat frame to rise and fall.

[0010] Preferably, the seat frame is formed with a mounting groove at the bottom with an opening toward the support assembly, and the connecting structure includes a connecting shell fixedly installed in the mounting groove and a rotating shaft rotatably arranged in the connecting shell, and the rotating shaft is fixedly connected to the threaded section.

[0011] Preferably, the connecting shell is placed in the mounting groove, the inner wall cross-section of the mounting groove is polygonal to limit the circumferential rotation of the connecting shell along the transmission screw, and the electric lifting seat also includes a cover plate, which is arranged at the opening of the mounting groove and fixedly connected to the seat frame to limit the axial movement of the connecting shell along the transmission screw; the connecting shell is provided with a first through-hole, and the cover plate is provided with a second through-hole aligned with the first through-hole, and the threaded section or rotating shaft extends out of the mounting groove through the first through-hole and the second through-hole.

[0012] Preferably, the output shaft of the drive motor is arranged perpendicular to the rotating shaft, the output shaft of the drive motor extends into the connecting shell, and the output shaft fixing sleeve of the drive motor is provided with a driving helical gear, and the rotating shaft fixing sleeve is provided with a transmission helical gear, and the driving helical gear and the transmission helical gear are meshed for transmission.

[0013] Preferably, the seat frame has a lowest position and a highest position relative to the support assembly, and the upper end surface of the fixed sleeve has a first set gap between the seat frame at the lowest position and the connecting structure, and the first set gap is a selected value between 0 and 1 cm; the fixed sleeve is provided with an internal thread extending to the port at least at its upper end, and the threaded section is threadedly connected to the fixed sleeve through the internal thread.

[0014] Preferably, the support assembly forms a support plane for contacting an external bearing ground, and the bottom end of the threaded segment has a second set gap between the seat frame at the highest position and the support plane, and the second set gap is a selected value between 1 cm and 2 cm.

[0015] Preferably, the inner wall of the fixing sleeve is formed with the internal thread; or, a nut is fixedly provided in the fixing sleeve, and the threaded section is threadedly connected to the nut.

[0016] Preferably, the support assembly comprises a plate shell formed as an integral structure, the plate shell having a central axis, and the central axis of the plate shell coincides with the axis of the transmission screw.

[0017] Preferably, the support assembly includes a plate shell formed as an integral structure, and the electric lift seat also includes a connecting pipe sleeve, which passes through the plate shell and is fixedly connected to the plate shell, and the fixed sleeve is fixedly installed in the connecting pipe sleeve.

[0018] Preferably, the connecting sleeve includes an inner sleeve and an outer sleeve, the inner sleeve is arranged in the outer sleeve and the two are detachably fixedly connected, the fixed sleeve is fixedly installed in the inner sleeve, and the outer sleeve is detachably fixedly connected to the plate shell.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] By fixing the drive motor on the seat frame, the drive motor is prevented from occupying the space below the seat frame. In this way, the length of the threaded section in the transmission screw is increased, thereby increasing the height adjustment range of the seat frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of an electric lift seat provided in an embodiment of the present application;

[0022] Figure 2 This is an exploded view of the electric lift seat;

[0023] Figure 3 This is an exploded view of the lifting and adjusting mechanism;

[0024] Figure 4 A side view of the power lift seat with the seat frame in the lowest position;

[0025] Figure 5 A side view of the lifting adjustment mechanism with the seat frame in the lowest position;

[0026] Figure 6 A side view of the electrically-operated lift seat with the seat frame at its highest position;

[0027] Figure 7 It is a schematic diagram of the assembly of the fixed sleeve and the support assembly.

[0028] Among them, 1. Support assembly; 10. Plate and shell; 100. Opening; 101. Reinforcement rib; 102. Connecting plate; 11. Roller; 2. Seat frame; 20. Mounting groove; 21. Mounting tube; 3. Drive motor; 4. Fixed sleeve; 40. Connecting key; 5. Transmission screw; 50. Threaded section; 51. Connecting shell; 52. Rotating shaft; 6. Cover plate; 60. Second through-hole; 7. Connecting pipe sleeve; 70. Inner pipe sleeve; 71. Outer pipe sleeve; 710. Connecting frame; 72. Connecting cover; 73. Bottom plate; 8. Screw. DETAILED DESCRIPTION

[0029] Below, the present invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and cannot be understood as limiting this application.

[0030] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, a connection through an intermediary medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] This embodiment provides an electric lift seat, such as Figure 1 、 Figure 2 and Figure 3 As shown in , the electric lift seat includes a support assembly 1, a seat frame 2 disposed on the support assembly 1, and a lift adjustment mechanism disposed between the seat frame 2 and the support assembly 1. The lift adjustment mechanism includes a drive motor 3, a fixed sleeve 4, and a transmission screw 5. The drive motor 3 is fixedly disposed on the seat frame 2, and the fixed sleeve 4 is fixedly disposed on the support assembly 1. The transmission screw 5 includes a threaded segment 50 and a connecting structure disposed at one end of the threaded segment 50. The connecting structure is disposed within the seat frame 2. The threaded segment 50 passes through the seat frame 2 and extends into the fixed sleeve 4 and is threadedly engaged with the fixed sleeve 4. The connecting structure is configured to be fixed to the seat frame 2 along the axial direction of the transmission screw 5 and to rotate with the seat frame 2 along the circumferential direction of the transmission screw 5. The output shaft of the drive motor 3 is connected to the connecting structure and drives the transmission screw 5 to rise and fall through the connecting structure, thereby driving the seat frame 2 to rise and fall.

[0033] By fixing the drive motor 3 on the seat frame 2, the drive motor 3 is prevented from occupying the space below the seat frame 2, and the length of the threaded section 50 in the transmission screw 5 is increased, thereby increasing the height adjustment range of the seat frame.

[0034] Specifically in this embodiment, the seat frame 2 in this embodiment has a mounting slot 20 formed at the bottom thereof, the opening of which faces the support assembly 1. The connection structure includes a connection shell 51 fixedly mounted in the mounting slot 20 and a rotating shaft 52 rotatably disposed in the connection shell 51. The rotating shaft 52 is fixedly connected to the threaded segment 50. In this embodiment, the rotating shaft 52 and the threaded segment 50 form an integral structure. A bearing can be disposed in the connection shell 51, and the rotating shaft 52 is rotatably disposed in the connection shell 51 via the bearing. Through the above structural design, the threaded segment 50 is rotatably connected to the connection shell 51 via the rotating shaft 52. Since the connection shell 51 is fixedly disposed in the mounting slot 20, the rotating shaft 52 in the connection structure can be rotatably disposed relative to the seat frame 2.

[0035] Furthermore, the connecting shell 51 in this embodiment is placed in the mounting groove 20, and the inner wall cross-section of the mounting groove 20 is polygonal to limit the circumferential rotation of the connecting shell 51 along the transmission screw 5. The electric lift seat also includes a cover plate 6, which is arranged at the opening of the mounting groove 20 and is fixedly connected to the seat frame 2 to limit the axial movement of the connecting shell 51 along the transmission screw 5. Through the above-mentioned structural arrangement, the rotating shaft 52 can be fixed to the seat frame 2 along the axial direction of the transmission screw 5 and rotated with the seat frame 2 along the circumferential direction of the transmission screw 5. Correspondingly, a first through-hole (not shown in the figure) is provided in the connecting shell 51, and a second through-hole 60 is provided on the cover plate 6 to align with the first through-hole. The threaded section 50 or the rotating shaft 52 extends out of the mounting groove 20 through the first through-hole and the second through-hole 60.

[0036] Through the above structural design, the drive motor 3 is connected to the connecting structure. When the drive motor 3 rotates forward and reverse, the transmission screw 5 is driven to rotate through the connecting structure. Since the transmission screw 5 is threadedly matched with the fixed sleeve 4, the transmission screw 5 can perform a spiral upward or spiral downward movement, thereby driving the seat frame 2 and the drive motor 3 to rise and fall synchronously.

[0037] Specifically, in this embodiment, the output shaft of the drive motor 3 is arranged perpendicularly to the rotating shaft 52. The output shaft of the drive motor 3 extends into the connecting housing 51. A driving helical gear (not shown) is fixed to the output shaft of the drive motor 3, while a transmission helical gear (not shown) is fixed to the rotating shaft 52. The driving helical gear and the transmission helical gear mesh with each other for transmission. This structural design allows the drive motor 3 to be positioned on the side of the connecting structure without occupying height space. Furthermore, increasing the length of the threaded segment 50 can increase the height adjustment range of the seat frame. In this embodiment, a mounting channel is formed in the seat frame 2. The mounting channel communicates with the mounting slot 20 and extends to the exterior of the seat frame 2. A mounting tube 21 is fixedly disposed within the mounting channel. The drive motor 3 is fixedly mounted to the mounting tube 21 via its outer housing. The output shaft of the drive motor 3 passes through the mounting tube 21, and the two rotate in engagement.

[0038] Combine Figure 4 、 Figure 5 and Figure 6 As shown in , through the lifting and adjusting operation, the seat frame 2 can be made to have the lowest position and the highest position relative to the support assembly 1. Accordingly, when the seat frame 2 is at the lowest position relative to the support assembly 1, the connection structure in the lifting and adjusting mechanism has the minimum distance relative to the fixed sleeve 4; when the seat frame 2 is at the highest position relative to the support assembly 1, the connection structure in the lifting and adjusting mechanism has the maximum distance relative to the fixed sleeve 4. Figure 4 and Figure 5 As shown in FIG, the upper end surface of the fixed sleeve 4 has a first set gap H1 (i.e., the minimum distance between the two) between the seat frame 2 and the connecting structure when the seat frame 2 is at its lowest position. In this embodiment, the first set gap H1 is 0, which means that when the seat frame 2 is at its lowest position, the upper end surface of the fixed sleeve 4 contacts the connecting structure. In other optional embodiments, the first set gap H1 can also be a selected value between greater than 0 and no greater than 1 cm. Furthermore, the fixed sleeve 4 is provided with an internal thread (not shown) extending to the end port at least at its upper end. The threaded segment 50 is threadedly connected to the fixed sleeve 4 via the internal thread. This structural design allows the lower section of the threaded segment 50 to also threadably engage with the fixed sleeve 4, thereby increasing the length of the threaded segment 50 that can extend out of the fixed sleeve 4, thereby increasing the height adjustment range of the seat frame.

[0039] Further, such as Figure 4As shown in , the support assembly 1 forms a support plane for contacting an external support surface. This support plane is not a physical structure, but rather refers to the common plane where multiple support points at the lowest end of the support assembly 1 that contact the external support surface lie. Therefore, this support plane can also be understood as the external support surface. In this embodiment, a second set gap H2 is defined between the bottom end of the threaded segment 50 at the highest position of the seat frame 2 and the support plane. This second set gap H2 is a selected value between 1 cm and 2 cm. This structural design allows the length of the threaded segment 50 to be increased as much as possible without interfering with the ground, thereby increasing the height adjustment range of the seat frame.

[0040] As previously mentioned, the fixed sleeve 4 is provided with an internal thread extending to the port at least at its upper end. Specifically, in this embodiment, the internal thread is formed on the inner wall of the fixed sleeve 4, that is, the internal thread is directly machined into the inner wall of the fixed sleeve 4. The internal thread can be machined into only a section of the upper portion of the fixed sleeve 4, or it can be machined into the entire inner wall of the fixed sleeve 4. In other optional embodiments, a nut can be fixedly installed in the fixed sleeve 4, with the inner thread of the nut being the internal thread, and the threaded section 50 being in driving connection with the nut thread. It is easy to understand that the nut is fixedly installed at the upper end of the fixed sleeve 4.

[0041] Combine Figure 1 and Figure 7 As shown in , the support assembly 1 in this embodiment includes a plate shell 10 formed as an integral structure, and the plate shell 10 has a central axis, that is, the overall outline of the plate shell 10 is a centrally symmetrical shape symmetrical around a line, and the above-mentioned line is the central axis of the plate shell 10. The central axis of the plate shell 10 coincides with the axis of the transmission screw 5, that is, the transmission screw 5 is in the middle position of the support assembly 1. This design can make the connection structure of the transmission screw 5 also roughly in the middle of the seat frame 2, which can play a labor-saving role. In other optional embodiments, the support assembly 1 can further include a roller 11 arranged at the end support foot of the plate shell 10. Further, in combination with Figure 2 and Figure 7 As shown in FIG, the electric lift chair provided in this embodiment further includes a connecting sleeve 7, which extends through and is fixedly connected to the plate shell 10. The fixing sleeve 4 is fixedly installed in the connecting sleeve 7. An opening 100 is provided in the middle of the plate shell 10, through which the connecting sleeve 7 passes. It will be readily understood that to enhance the overall strength of the plate shell 10, a plurality of reinforcing ribs 101 are provided at the bottom of the plate shell 10.

[0042] Specifically, the connecting sleeve 7 includes an inner sleeve 70 and an outer sleeve 71. The inner sleeve 70 is disposed within the outer sleeve 71 and the two are removably fixedly connected. The fixed sleeve 4 is fixedly installed within the inner sleeve 70, and the outer sleeve 71 is removably fixedly connected to the plate shell 10. In this embodiment, a connecting cap 72 is provided at the ends of the inner sleeve 70 and the outer sleeve 71. The connecting cap 72 is snapped onto the inner sleeve 70 and the outer sleeve 71, and screws 8 are then passed through the connecting cap 72, the outer sleeve 71, and the inner sleeve 70 from the side to lock and secure the three. A base plate 73 is fixedly disposed at the bottom of the outer sleeve 71, and the base plate 73 is provided with a keyhole. Correspondingly, a connecting key 40 is provided at the bottom of the fixed sleeve 4, which is compatible with the keyhole. The fixed sleeve 4 can be tightly inserted into the keyhole through the connecting key 40.

[0043] A connecting frame 710 is fixedly welded to the outer wall of the outer pipe sleeve 71, a connecting plate 102 is provided on the plate shell 10, and a connecting flange is formed on the inner wall of the opening 100 of the plate shell 10. During assembly, the outer pipe sleeve 71 with the connecting frame 710 welded thereto can be passed through the opening 100, the connecting frame 710 is located on the connecting flange, and then the connecting plate 102 is placed on the connecting frame 710, and then the connecting plate 102, the connecting frame 710 and the connecting flange are locked and fixed using screws.

[0044] Finally, it should be noted that the above-mentioned implementation mode is only an optional embodiment of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An electrically adjustable seat comprising a support assembly, a seat frame disposed on the support assembly, and a lift adjustment mechanism disposed between the seat frame and the support assembly, characterized in that: The lifting and adjusting mechanism comprises: A driving motor is fixedly mounted on the seat frame; a fixed sleeve, which is fixedly mounted on the support assembly; and A transmission screw, comprising a threaded section and a connecting structure provided at one end of the threaded section, the connecting structure being provided in the seat frame, the threaded section passing through the seat frame and extending into the fixed sleeve and being threadedly engaged with the fixed sleeve; Among them, the connecting structure is configured to be fixed to the seat frame along the axial direction of the transmission screw and to rotate with the seat frame along the circumferential direction of the transmission screw. The output shaft of the drive motor is connected to the connecting structure and drives the transmission screw to rise and fall through the connecting structure, thereby driving the seat frame to rise and fall.

2. The electric lift seat according to claim 1, characterized in that: The seat frame is formed with a mounting groove at the bottom with an opening toward the support assembly. The connection structure includes a connecting shell fixedly installed in the mounting groove and a rotating shaft rotatably arranged in the connecting shell. The rotating shaft is fixedly connected to the threaded section.

3. The electric lift seat according to claim 2, characterized in that: The connecting shell is placed in the mounting groove, and the inner wall cross-section of the mounting groove is polygonal to limit the circumferential rotation of the connecting shell along the transmission screw. The electric lift seat also includes a cover plate, which is arranged at the opening of the mounting groove and fixedly connected to the seat frame to limit the axial movement of the connecting shell along the transmission screw. The connecting shell is provided with a first through-hole, the cover plate is provided with a second through-hole aligned with the first through-hole, and the threaded section or the rotating shaft extends out of the mounting slot through the first through-hole and the second through-hole.

4. The electric lift seat according to claim 2, characterized in that: The output shaft of the drive motor is arranged perpendicular to the rotating shaft, and the output shaft of the drive motor extends into the connecting shell. The output shaft fixing sleeve of the drive motor is provided with a driving helical gear, and the rotating shaft fixing sleeve is provided with a transmission helical gear. The driving helical gear and the transmission helical gear are meshed for transmission.

5. The electric lift chair according to any one of claims 1 to 4, characterized in that: The seat frame has a lowest position and a highest position relative to the support assembly, and an upper end surface of the fixed sleeve has a first set gap between the seat frame at the lowest position and the connecting structure, wherein the first set gap is a selected value between 0 and 1 cm; The fixing sleeve is provided with an internal thread extending to the port at least at its upper end, and the threaded section is threadedly connected to the fixing sleeve via the internal thread.

6. The electric lift seat according to claim 5, characterized in that: The support assembly is formed with a support plane for contacting an external load-bearing ground, and a second set gap is formed between the bottom end of the threaded segment and the support plane when the seat frame is at the highest position, and the second set gap is a selected value between 1 cm and 2 cm.

7. The electric lift seat according to claim 5, characterized in that: The inner wall of the fixing sleeve is formed with the internal thread; or, A nut is fixedly arranged in the fixed sleeve, and the threaded section is threadedly connected to the nut.

8. The electric lift chair according to any one of claims 1 to 4, characterized in that: The support assembly includes a plate shell formed as an integral structure, the plate shell has a central axis, and the central axis of the plate shell coincides with the axis of the transmission screw.

9. The electric lift seat according to claim 8, characterized in that: The electric lift seat further comprises a connecting sleeve, which passes through the plate shell and is fixedly connected to the plate shell, and the fixing sleeve is fixedly installed in the connecting sleeve.

10. The electric lift seat according to claim 9, characterized in that: The connecting sleeve includes an inner sleeve and an outer sleeve, the inner sleeve is arranged in the outer sleeve and the two are detachably fixedly connected, the fixed sleeve is fixedly installed in the inner sleeve, and the outer sleeve is detachably fixedly connected to the plate shell.

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