Liftable bedside table
By designing a lifting mechanism that can lift the bedside table, the height and movable cavity height can be adjusted, which solves the problem that existing bedside tables are difficult to match the height of different bed frames and user needs, and improves the convenience of use and adaptability.
Patent Information
- Application Number
- CN202420644643.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The existing bedside table has a constant height, making it difficult to match bed frames of different heights, and it is difficult for users to personalize the height of the bedside table according to their own needs, reducing user convenience.
A liftable bedside table is designed, and the first cabinet body and the second cabinet body are driven to move vertically in a relative direction by a lifting mechanism, so that the height of the movable cavity and the height of the overall bedside table are changed, and to adapt to bed frames and user needs of different heights.
It realizes flexible adjustment of the height of the bedside table, improves the adaptability of the bedside table and the bed frame, meets the personalized needs of users, and adapts to the storage of items of different heights through the height changes of the movable cavity.
Smart Images
Figure CN222656581U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of furniture, and in particular to a liftable bedside table. Background Art
[0002] Bedside tables are convenient for users to place frequently used items when lying down. Currently, bedside tables on the market have a constant height, while the heights of different bed frames vary greatly. Bedside tables with a constant height are difficult to match bed frames of different heights, and users also find it difficult to adjust the height of the bedside table according to their own needs, reducing the convenience of users placing items at night.
[0003] At the same time, the constant height of the bedside table also limits the height of the storage space of the bedside table. When the items that the user needs to place are higher than the height of the storage space of the bedside table, it is difficult to store the items in the bedside table. Utility Model Content
[0004] In order to solve at least one of the above technical problems, the present application provides a liftable bedside table, and the technical solution adopted is as follows:
[0005] The present application provides a liftable bedside table, which includes a first cabinet body and a second cabinet body, wherein a fixed cavity is provided inside the first cabinet body; the first cabinet body is embedded in the second cabinet body, and a movable cavity is provided between the second cabinet body and the first cabinet body; wherein a lifting mechanism is provided between the first cabinet body and the second cabinet body, and the lifting mechanism drives the first cabinet body and the second cabinet body to move relative to each other, so that the height of the movable cavity changes, and at the same time, the height of the liftable bedside table changes.
[0006] In certain embodiments of the present application, the lifting mechanism includes a gear and a rack, the gear and the rack are meshed with each other, and the gear rotates to drive the first cabinet and the second cabinet to move relative to each other along the extension direction of the rack.
[0007] In certain embodiments of the present application, the lifting mechanism further includes a first driving structure, and the first driving structure is used to drive the gear to rotate.
[0008] In certain embodiments of the present application, the lifting mechanism includes a second driving structure, the second driving structure connects the first cabinet and the second cabinet, and the second driving structure is used to drive the first cabinet and the second cabinet to move relative to each other.
[0009] In certain embodiments of the present application, the rack is disposed on the first cabinet, the second cabinet is provided with a supporting structure, and the first driving structure together with the gear is disposed on the supporting structure.
[0010] In certain embodiments of the present application, the first cabinet is located on top of the second cabinet, the second cabinet has rollers at the bottom, and the first cabinet has a slot at the top, and the roller can be embedded in the slot, so that several of the liftable bedside cabinets are combined into one.
[0011] In certain embodiments of the present application, the first cabinet is located at the bottom of the second cabinet, a roller is provided at the bottom of the first cabinet, and a slot is provided at the top of the second cabinet. The roller can be embedded in the slot to combine several of the liftable bedside cabinets into one.
[0012] In certain embodiments of the present application, the liftable bedside table further includes a power structure, which serves as a power source for the lifting mechanism and drives the lifting mechanism to move.
[0013] In certain embodiments of the present application, the lifting mechanism further includes a trigger structure, a first sensor and a second sensor, the first sensor and the second sensor are respectively arranged at both ends of the rack, and when the trigger structure reaches the position of the first sensor or the second sensor, the lifting mechanism stops moving.
[0014] In certain embodiments of the present application, the liftable bedside table further includes a controller and a control panel, wherein the controller is electrically connected to the lifting mechanism and the control panel, and operating the control panel can control the lifting mechanism to move.
[0015] The embodiments of the present application have at least the following beneficial effects: in the present application, the lifting mechanism drives the first cabinet and the second cabinet to perform relative movement in the vertical direction. During the movement, the overall height of the liftable bedside table changes, so that the height of the liftable bedside table adapts to the height of the bed frame, thereby improving the adaptability of the liftable bedside table and the bed frame. At the same time, the user can adjust the height of the liftable bed frame according to their own needs to meet the user's personalized needs; an active cavity for placing objects is provided between the first cabinet and the second cabinet. With the relative movement of the first cabinet and the second cabinet, the height of the active cavity also changes to adapt to the height of the objects to be stored, thereby improving the versatility of the active cavity.
[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0018] Figure 1 It is a structural schematic diagram of the liftable bedside table of the present application;
[0019] Figure 2 This is a structural schematic diagram of the first embodiment of the liftable bedside cabinet of the present application, in which the side wall of the second cabinet is hidden and the height is increased;
[0020] Figure 3 It is a structural schematic diagram of the first embodiment of the liftable bedside table of the present application being assembled and the height of the bottom liftable bedside table being raised;
[0021] Figure 4 It is a structural schematic diagram of the first embodiment of the liftable bedside table of the present application being assembled and lifted to the maximum height;
[0022] Figure 5 This is a structural schematic diagram of the second embodiment of the liftable bedside cabinet of the present application, in which the side wall of the second cabinet is hidden and the height is increased;
[0023] Figure 6 It is a structural schematic diagram of the second embodiment of the liftable bedside table of the present application being combined and the height of the top liftable bedside table being increased;
[0024] Figure 7 It is a structural schematic diagram of the second embodiment of the liftable bedside table of the present application being assembled and lifted to the maximum height.
[0025] Reference numerals:
[0026] First cabinet 101; fixed cavity 102; second cabinet 103; movable cavity 104; card slot 105;
[0027] Gear 201; rack 202; first driving structure 203; supporting structure 204;
[0028] Power structure 301; controller 302; control panel 303. DETAILED DESCRIPTION
[0029] This section will combine Figures 1 to 7 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0030] In the description of the present application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The features defined as "first" and "second" are used to distinguish the feature names, rather than having special meanings. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.
[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0032] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a liftable bedside table, which includes a first cabinet body 101 and a second cabinet body 103 .
[0033] The first cabinet 101 and the second cabinet 103 are stacked in the vertical direction and are movably connected. The first cabinet 101 and the second cabinet 103 can move relative to each other in the vertical direction, so that the overall height of the liftable bedside table changes. By adjusting the height of the liftable bedside table, the height of the liftable bedside table can match the height of the bed frame on the market, ensuring the comfort of the user when using the bedside table on the bed. At the same time, different users have different requirements for the height of the bedside table, and the user can adjust the height of the liftable bedside table to meet their own needs.
[0034] Furthermore, when the first cabinet 101 and the second cabinet 103 move relative to each other, the height of the space between the first cabinet 101 and the second cabinet 103 will also change. The space between the first cabinet 101 and the second cabinet 103 is used to place items. When the height of the items to be placed is relatively large, the user can increase the height of the above space by adjusting the relative position of the first cabinet 101 and the second cabinet 103 to accommodate the items to be placed; when the height of the items to be placed is relatively small and the liftable bedside table does not need to occupy too much space, the user can lower the height of the above space by adjusting the relative position of the first cabinet 101 and the second cabinet 103, so as to accommodate the items to be placed and save indoor space.
[0035] In some examples, the first cabinet 101 includes a top plate, a bottom plate and a surrounding wall, and the top plate, the bottom plate and the surrounding wall form a fixed cavity 102, and the height of the fixed cavity 102 is a certain value. The fixed cavity 102 is used to store items. To facilitate the placement of items in the fixed cavity 102, there is an opening on the surrounding wall of the first cabinet 101, so that the fixed cavity 102 is formed into a semi-enclosed space.
[0036] Specifically, if the fixed cavity 102 needs to be formed into a closed space, a drawer structure is added in the fixed cavity 102, and the drawer structure is inserted into the fixed cavity 102 along the opening on the surrounding wall of the first cabinet 101. The drawer structure normally closes the fixed cavity 102, and the drawer structure can also simplify the process of inserting objects into the fixed cavity 102. It only needs to pull out the drawer structure, insert objects into the drawer structure, and then insert the drawer structure into the fixed cavity 102 to complete the placement process.
[0037] The second cabinet 103 includes a top plate and a surrounding wall, or the second cabinet 103 includes a bottom plate and a surrounding wall, then the top or bottom of the second cabinet 103 is hollowed out, and the first cabinet 101 is embedded in the second cabinet 103 along the hollow position of the top or bottom of the second cabinet 103, so as to form a vertical stack of the first cabinet 101 and the second cabinet 103, and the first cabinet 101 and the second cabinet 103 can move relative to each other in the vertical direction. When the first cabinet 101 is embedded in the second cabinet 103 from the top of the second cabinet 103, the bottom plate of the first cabinet 101, the bottom plate of the second cabinet 103 and the surrounding wall of the second cabinet 103 form an active cavity 104; when the first cabinet 101 is embedded in the second cabinet 103 from the bottom of the second cabinet 103, the top plate of the first cabinet 101, the top plate of the second cabinet 103 and the surrounding wall of the second cabinet 103 form an active cavity 104. It can be understood that, with the relative movement of the first cabinet 101 and the second cabinet 103 , the height of the movable cavity 104 also changes.
[0038] The movable cavity 104 is also used to store articles. To facilitate the placement of articles in the movable cavity 104 , an opening is also provided on the surrounding wall of the second cabinet 103 , so that the movable cavity 104 is formed into a semi-enclosed space.
[0039] In some examples, the shapes of the first cabinet 101 and the second cabinet 103 can be set arbitrarily according to the needs of the user, but the shapes of the two need to be approximately the same to ensure the structural stability of the liftable bedside table and avoid a large gap between the first cabinet 101 and the second cabinet 103 when the first cabinet 101 is embedded in the second cabinet 103, which may cause the first cabinet 101 or the second cabinet 103 to shake easily. Specifically, the first cabinet 101 and the second cabinet 103 are both set in the shape of a quadrangular prism.
[0040] In some examples, the upper and lower positions of the first cabinet 101 and the second cabinet 103 can be set according to user preference, with the first cabinet 101 being at the top of the second cabinet 103 , or the first cabinet 101 being at the bottom of the second cabinet 103 .
[0041] In some examples, in order to drive the first cabinet 101 and the second cabinet 103 to perform relative movement in the vertical direction, a lifting mechanism is provided between the first cabinet 101 and the second cabinet 103. When the lifting mechanism drives the first cabinet 101 and the second cabinet 103 to move away from each other, the overall height of the liftable bedside cabinet is increased, and the height of the active cavity 104 between the first cabinet 101 and the second cabinet 103 is increased; when the lifting mechanism drives the first cabinet 101 and the second cabinet 103 to move closer to each other, the overall height of the liftable bedside cabinet is reduced, and the height of the active cavity 104 between the first cabinet 101 and the second cabinet 103 is reduced.
[0042] It is worth noting that when the lifting mechanism drives the first cabinet 101 to approximately reach the hollow position at the top or bottom of the second cabinet 103, the height of the liftable bedside table reaches the maximum value, and the height of the movable cavity 104 also reaches the maximum value. Continuing to increase the height of the liftable bedside table will cause the first cabinet 101 to separate from the second cabinet 103. Similarly, when the lifting mechanism drives the first cabinet 101 to contact the top plate or bottom plate of the second cabinet 103, the height of the liftable bedside table reaches the minimum value, and the height of the movable cavity 104 also reaches the minimum value. Due to the structural interference between the first cabinet 101 and the second cabinet 103, the height of the liftable bedside table cannot be further lowered.
[0043] Specifically, the lifting mechanism is arranged between the surrounding walls of the first cabinet 101 and the second cabinet 103. To ensure the stability of the first cabinet 101 and the second cabinet 103 when they are moving relative to each other in the vertical direction, at least two lifting mechanisms are arranged, and each lifting mechanism is arranged at intervals. Specifically, when the first cabinet 101 and the second cabinet 103 are arranged in a quadrangular prism shape, two lifting mechanisms are arranged, and the two lifting mechanisms are respectively located on opposite sides of the liftable bedside cabinet.
[0044] like Figure 2 As shown, in some examples, the lifting structure includes a gear 201 and a rack 202, and the gear 201 and the rack 202 are meshed with each other. The gear 201 is arranged on the surrounding wall of the second cabinet 103, and the rack 202 is arranged on the surrounding wall of the first cabinet 101; or, the gear 201 is arranged on the surrounding wall of the first cabinet 101, and the rack 202 is arranged on the surrounding wall of the second cabinet 103. The gear 201 rotates on the rack 202, thereby driving the first cabinet 101 and the second cabinet 103 to move relative to each other along the direction of the rack 202. Since the first cabinet 101 and the second cabinet 103 need to move relative to each other in the vertical direction, the rack 202 is arranged along the vertical direction.
[0045] In some examples, in order to drive the gear 201 to rotate, the lifting mechanism further includes a first driving structure 203, and the first driving structure 203 can adopt any structure capable of outputting rotational motion. Specifically, the first driving structure 203 adopts a motor, and the gear 201 is sleeved on the output shaft of the motor, and the motor and the gear 201 form a whole that outputs rotational motion.
[0046] In some examples, when the rack 202 is disposed on the first cabinet 101 and the gear 201 is disposed on the second cabinet 103, the gear 201 needs to be disposed at a position away from the top plate or the bottom plate of the second cabinet 103 to ensure the relative motion stroke of the first cabinet 101 and the second cabinet 103. As the gear 201 rotates, the gear 201 and the rack 202 will also move away from each other, thereby driving the first cabinet 101 and the second cabinet 103 to move away from each other. If the gear 201 is located near the top plate or the bottom plate of the second cabinet 103, the gear 201 and the rack 202 will be separated from each other under a shorter relative motion stroke, making it difficult to continue to raise the height of the liftable bedside table.
[0047] Furthermore, the second cabinet 103 is provided with a support structure 204, which extends a certain distance away from the top plate or bottom plate of the second cabinet 103, and the first driving structure 203 and the gear 201 are arranged on the support structure 204 to ensure that the first cabinet 101 and the second cabinet 103 have sufficient relative motion travel.
[0048] Similarly, when the rack 202 is arranged on the second cabinet 103 and the gear 201 is arranged on the first cabinet 101, the gear 201 needs to be arranged near the top plate or the bottom plate of the second cabinet 103 to ensure that the first cabinet 101 and the second cabinet 103 have sufficient relative motion travel.
[0049] In some examples, under the premise that the gear 201 and the rack 202 independently support the first cabinet 101 or the second cabinet 103, if the weight of the first cabinet 101 or the second cabinet 103 is large, the gear 201 and the rack 202 may not have sufficient support strength, resulting in deformation of the gear 201 and the rack 202. At this time, the lifting mechanism also includes a second driving structure, which can assist the gear 201 and the rack 202 in driving the first cabinet 101 and the second cabinet 103 to move relative to each other in the vertical direction, so as to avoid the situation where the gear 201 and the rack 202 independently support the first cabinet 101 or the second cabinet 103.
[0050] The second driving structure connects the first cabinet 101 and the second cabinet 103 . Specifically, the second driving structure adopts a structure capable of outputting linear motion, such as a pneumatic rod or an electric push rod.
[0051] It can be understood that when the weight of the first cabinet 101 or the second cabinet 103 is relatively small, the lifting mechanism can use the gear 201 and the rack 202 alone, or use the second drive structure alone; when the weight of the first cabinet 101 or the second cabinet 103 is relatively large, the lifting structure can use the gear 201, the rack 202 and the second drive structure at the same time.
[0052] like Figure 2 , Figure 3 and Figure 4 As shown, in the first embodiment, the first cabinet 101 is located on top of the second cabinet 103. To ensure the mobility of the liftable bedside cabinet, the bottom of the second cabinet 103 is provided with rollers that can roll on the ground. It is understandable that at least three rollers are provided to ensure that the liftable bedside cabinet is stably located on the ground.
[0053] Furthermore, several liftable bedside cabinets can be combined to form a multi-layer cabinet structure. A card slot 105 is provided on the top of the first cabinet body 101. The number and position of the card slot 105 correspond to the number and position of the rollers. When two adjacent liftable bedside cabinets are combined, the rollers of the top liftable bedside cabinet are embedded in the card slot 105 of the bottom liftable bedside cabinet. The cooperation between the card slot 105 and the rollers is conducive to the positioning of the two adjacent liftable bedside cabinets, and prevents the top liftable bedside cabinet from falling.
[0054] like Figure 5 , Figure 6 and Figure 7As shown, in the second embodiment, the first cabinet 101 is located at the bottom of the second cabinet 103 . To ensure the mobility of the liftable bedside cabinet, rollers are provided at the bottom of the first cabinet 101 .
[0055] Furthermore, several liftable bedside cabinets can also be combined to form a multi-layer cabinet structure. A slot 105 is provided on the top of the second cabinet body 103. When two adjacent liftable bedside cabinets are combined, the roller of the top liftable bedside cabinet is embedded in the slot 105 of the bottom liftable bedside cabinet to position the two adjacent liftable bedside cabinets.
[0056] like Figure 2 As shown, in some examples, the liftable bedside table further includes a power structure 301, which is disposed inside the first cabinet 101 or the second cabinet 103, and provides power for the lifting mechanism. Specifically, when the first driving structure 203 uses a motor, the power structure 301 uses a battery, and the battery is placed in a battery box, and the battery provides power to the motor to ensure the operation of the motor.
[0057] In some examples, in order to avoid the relative movement overtravel between the first cabinet 101 and the second cabinet 103, the lifting mechanism further includes a trigger structure, a first sensor, and a second sensor. When the lifting mechanism includes a gear 201 and a rack 202, the first sensor and the second sensor are respectively arranged at both ends of the rack 202, and the trigger structure is on the first cabinet 101 or the second cabinet 103 where the gear 201 is arranged. When the trigger structure reaches both ends of the rack 202, the first sensor or the second sensor senses that the trigger structure has reached the limit position. At this time, the liftable bedside table is already at the maximum height or the minimum height, and the first sensor or the second sensor sends a signal to the first drive structure 203 to stop the first drive structure 203 from moving.
[0058] like Figure 2 As shown, in some examples, the liftable bedside table further includes a controller 302 and a control panel 303, the controller 302 is arranged inside the first cabinet 101 or the second cabinet 103, and the control panel 303 is arranged outside the surrounding wall of the first cabinet 101 or the second cabinet 103. The controller 302 is electrically connected to the lifting mechanism and the control panel 303, and the user operates the control panel 303 to send a signal to the controller 302, and the controller 302 then sends the signal to the lifting mechanism, thereby forming a control of the movement of the liftable bedside table.
[0059] It is understandable that the power structure 301 is also connected to the controller 302 through a line to drive the controller 302 to work. In addition, when the liftable bedside table has several lifting mechanisms, each lifting mechanism is connected to the controller 302 through a line, and the controller 302 drives each lifting mechanism to move synchronously.
[0060] In some examples, there are two buttons on the control panel 303, which respectively control the rise and fall of the liftable bedside table. During use, continuously pressing the button will cause the table to rise or fall, and releasing the button will stop the table from rising or falling.
[0061] In the description of this specification, if the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" appear, it means that the specific features, structures, 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0062] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.
Claims
1. A liftable bedside table, characterized in that: include: A first cabinet (101), wherein a fixed cavity (102) is provided inside the first cabinet (101); A second cabinet (103), wherein the first cabinet (101) is embedded in the second cabinet (103), and a movable cavity (104) is provided between the second cabinet (103) and the first cabinet (101); A lifting mechanism is provided between the first cabinet (101) and the second cabinet (103), and the lifting mechanism drives the first cabinet (101) and the second cabinet (103) to move relative to each other, so that the height of the movable cavity (104) changes, and at the same time, the height of the liftable bedside cabinet changes.
2. The liftable bedside table according to claim 1, characterized in that: The lifting mechanism comprises a gear (201) and a rack (202); the gear (201) and the rack (202) are meshed with each other; the gear (201) rotates to drive the first cabinet (101) and the second cabinet (103) to move relative to each other along the extension direction of the rack (202).
3. The liftable bedside table according to claim 2, characterized in that: The lifting mechanism further comprises a first driving structure (203), wherein the first driving structure (203) is used to drive the gear (201) to rotate.
4. The liftable bedside table according to claim 1 or 2, characterized in that: The lifting mechanism comprises a second driving structure, the second driving structure connects the first cabinet (101) and the second cabinet (103), and the second driving structure is used to drive the first cabinet (101) and the second cabinet (103) to move relative to each other.
5. The liftable bedside table according to claim 3, characterized in that: The rack (202) is arranged on the first cabinet (101), the second cabinet (103) is provided with a supporting structure (204), and the first driving structure (203) and the gear (201) are arranged on the supporting structure (204).
6. The liftable bedside table according to claim 1, characterized in that: The first cabinet (101) is located on the top of the second cabinet (103); a roller is provided at the bottom of the second cabinet (103); a slot (105) is provided at the top of the first cabinet (101); the roller can be embedded in the slot (105), so that a plurality of liftable bedside cabinets are combined into one.
7. The liftable bedside table according to claim 1, characterized in that: The first cabinet (101) is located at the bottom of the second cabinet (103); a roller is provided at the bottom of the first cabinet (101); a slot (105) is provided at the top of the second cabinet (103); the roller can be embedded in the slot (105), so that a plurality of liftable bedside cabinets are combined into one.
8. The liftable bedside table according to claim 1, characterized in that: The liftable bedside table further comprises a power structure (301), which serves as a power source for the lifting mechanism and drives the lifting mechanism to move.
9. The liftable bedside table according to claim 3, characterized in that: The lifting mechanism further comprises a trigger structure, a first sensor and a second sensor, wherein the first sensor and the second sensor are respectively arranged at two ends of the rack (202), and when the trigger structure reaches the position of the first sensor or the second sensor, the lifting mechanism stops moving.
10. The liftable bedside table according to claim 9, characterized in that: The liftable bedside table further comprises a controller (302) and a control panel (303); the controller (302) is electrically connected to the lifting mechanism and the control panel (303); and the lifting mechanism can be controlled to move by operating the control panel (303).