Movable screen device and table

Abstract

The invention discloses a movable screen device and a table. The screen device comprises a cross beam, a main body piece, a lifting mechanism and a locking mechanism. The cross beam serves as a main body support, and the main body piece can vertically slide on the cross beam; the lifting mechanism comprises a rotating piece and a fixed piece, the rotating piece ascends and descends along with the main body piece and is in transmission with the fixed piece, and the rotating piece synchronously rotates when the main body piece ascends and descends; the locking mechanism is arranged on the main body piece, the switch controls the locking and unlocking states of the locking mechanism, the switch has a trend of moving downwards to enable the mechanism to keep locking, the rotating piece is tightly held to fix the main body piece during locking, and the switch is lifted during unlocking; the movable screen device is arranged on the table board or the table legs, and the main body piece can ascend and descend relative to the table board to change the shielding height of the screen. The device achieves flexible lifting through cooperation of the cross beam and the main body piece and the lifting mechanism, and the requirements of different office scenes are met; the locking mechanism prevents the screen from sliding downwards, and operation is easy and convenient; complex driving devices such as hydraulic pressure and air rods are not needed, the structure is simplified, the cost is reduced, and economical efficiency and stability are achieved.

Description

Technical Field

[0001] The present invention relates to the field of furniture, and in particular to a movable screen device and a table. Background Art

[0002] In modern office scenarios, desk screens are commonly used devices for desktop space separation, privacy protection, and visual buffering. The practicality and convenience of their height adjustment function are crucial; however, traditional desk screens generally have functional defects in height adjustment, making it difficult to meet diverse office needs.

[0003] Most existing desktop screens are designed with a fixed height and cannot be dynamically adjusted according to the user's height, office scene or collaboration needs. Taller users may have their desktop activities disturbed by the sight of others because the screen is too low, resulting in insufficient privacy protection. Shorter users may feel visually oppressed because the screen is too high, affecting natural communication with colleagues. When temporary collaboration or group discussions are required, fixed-height screens cannot be quickly lowered to create an open atmosphere. When focusing on work, they cannot be raised to enhance privacy, resulting in a "one-size-fits-all" user experience.

[0004] Some desktop screens that attempt to achieve lifting functions still have various defects, among which the inability to achieve stable self-locking is one of the most critical problems; traditional lifting solutions mostly rely on mechanical structures such as gear racks, lead screws and nuts, and often rely on the self-locking ability of the mechanism itself. They often slide down due to gravity or load, affecting the height at which the screen stays, resulting in a low user experience; some lifting screens are also equipped with a locking switch. When controlling the lifting, it is necessary to operate the switch and the screen lifting, which is difficult and complicated to operate; some solutions use hydraulics, gas rods or even motors as driving devices. Although the lifting operation becomes easier, the production cost is higher, and the problem of these driving devices sliding down due to their own weight or load is more obvious. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the present invention provides a movable screen device, including a beam, a main body, a lifting mechanism and a locking mechanism; the beam serves as the main body support, and the main body can slide up and down on it; the lifting mechanism contains a rotating part and a fixed part, the rotating part rises and falls with the main body and is transmitted with the fixed part, so that the rotating part rotates synchronously when the main body is raised and lowered; the locking mechanism is provided on the main body, and the switch controls its locking and unlocking states, and the switch has a tendency to move downward to keep the mechanism locked, and when locked, the rotating part is held tightly to fix the main body, and when unlocked, the switch can be lifted; the device realizes flexible lifting and lowering through the cooperation of the beam and the main body and the lifting mechanism to meet the needs of different office scenes; the locking mechanism prevents the screen from sliding down and is easy to operate; and no complex driving devices such as hydraulics and gas rods are required, which simplifies the structure, reduces costs, and has both economy and stability.

[0006] Furthermore, a table is provided, wherein a movable screen device is arranged on a table top or table legs, and a main body can be raised and lowered relative to the table top to change the shielding height of the screen.

[0007] The technical solution of the present invention is achieved as follows: A movable screen device, comprising: a crossbeam configured as a main support for the device; The main body is slidably arranged on the crossbeam; The lifting mechanism includes a rotating member and a fixed member. The rotating member is rotatably mounted on the main member and rises and falls synchronously with the main member. The fixed member is fixedly mounted on the crossbeam and is in transmission connection with the fixed member. When the main member is raised or lowered, the rotating member rotates under the action of the fixed member. The locking mechanism is arranged on the main body, and the locking mechanism includes a switch, which is arranged to be movable relative to the main body, and the switch is configured to control the state of the locking mechanism; the locking mechanism has a locking feature and an unlocking state, and the switch has a movement tendency to move downward and keep the locking mechanism in the locked state; in the locked state, the locking mechanism holds the rotating part and keeps the main body and the beam relatively stationary; when the switch moves upward and is lifted, the locking mechanism is in the unlocking state, and the rotating part can rotate so that the main body can slide up and down relative to the beam.

[0008] First of all, the crossbeam is matched with the main body that can slide up and down, and the lifting mechanism driven by the rotating parts and fixed parts is combined to realize the flexible lifting function of the desktop screen. The height can be quickly adjusted according to the user's height and office scene requirements. It not only meets the privacy protection when concentrating on work, but also facilitates the creation of an open atmosphere during temporary collaboration, thereby improving the adaptability of the usage scenario.

[0009] Secondly, the advantages of the locking mechanism: the switch has a tendency to move downward and keep the locking mechanism in a locked state, holding the rotating part tightly in the locked state. Compared with the traditional method of relying on the self-locking ability of the mechanism itself, it effectively avoids the problem of sliding and sinking caused by gravity or load, ensuring that the screen stays stably at the target height; and when unlocking, you only need to lift the switch upwards, which is easy to operate and does not require complicated double operations like traditional screens with locking switches, which significantly improves the convenience of use.

[0010] In addition, this solution does not require complex drive devices such as hydraulics, pneumatic rods or motors, which simplifies the structure and reduces production costs. At the same time, it avoids the problems of dead weight or load slippage caused by the use of such devices, and is both economical and stable.

[0011] Preferably, a tabletop is provided on the upper end of the main body for placing items. This adds a storage platform to the screen device to enhance functionality. In addition to being used as a screen, the screen device can also be used to place items. Since the screen device has a lifting function, it is equivalent to adding an additional lifting platform to the table in use.

[0012] Preferably, a storage plate is fixedly provided on the upper end of the main body, and the length of the storage plate in the front-to-back direction is greater than the thickness of the main body in the front-to-back direction, thereby ensuring the storage area of ​​the storage plate so that it can effectively perform its storage function.

[0013] Preferably, an L-shaped connecting piece is provided at the upper end of the main body, and the connecting piece is fixedly connected to the main body and the storage plate, thereby increasing the connection area and maintaining the connection stability of the storage plate.

[0014] Preferably, the rotating member and the fixed member are connected via a threaded transmission.

[0015] Preferably, the lifting mechanism is a screw-nut assembly, the rotating member is a screw, the fixed member is a nut, and the rotating member is vertically arranged on the main member. This can realize the lifting of the main member at a low cost, and the locking mechanism has an object to lock, effectively realizing the locking function.

[0016] Preferably, the locking mechanism further comprises a sleeve, a locking member, and a locked member. The sleeve is fixedly mounted on the main member, and the switch is rotatably mounted on the sleeve around a left-right axis. A bearing is provided in the sleeve, and one end of the rotating member is disposed in the bearing. The locked member is disposed at this end of the rotating member and is located in the sleeve, with the locked member being close to the locking member relative to the bearing. The locking member comprises a locking portion and a follower portion fixed to each other. The locking portion is slidably disposed in the sleeve, and the follower portion abuts against the switch and moves as the switch rotates. When the switch rotates downward, the locking member slides downward therewith and locks the locking portion with the locked member, and the locking mechanism is in a locked state. When the switch rotates upward, the locking member slides upward therewith and disengages the locking portion from the locked member, and the locking mechanism is in an unlocked state. Absolute locking of the main member is achieved through structural locking between the locking member and the locked member. While the rotating member is kept from rotating, it is ensured that the main member will not slide down due to its own weight or load.

[0017] Preferably, both the locking portion and the locked member are provided with meshing teeth, which are arranged circumferentially on the locking portion and the locked member. The meshing teeth can increase the probability of locking by meshing with each other, and the user does not need to lift the main member to a specific height before locking, making the locking operation more convenient.

[0018] Preferably, a downward pressure spring is provided on the upper end surface of the follower portion, the downward pressure spring abutting against the main body, and the downward pressure spring is configured to always exert an elastic force on the locking member to slide downward, that is, to exert an elastic force on the switch to rotate downward, thereby effectively locking the rotating member when the switch is not operated.

[0019] Preferably, the switch comprises a control portion, a limiting portion, and an abutting portion. A limiting protrusion corresponding to the limiting portion is provided on the sleeve and located below the switch. When the limiting portion abuts the limiting protrusion downward, the locking mechanism is locked. The abutting portion is located above the limiting portion and is configured to always abut the locking member. The control portion is configured to allow the user to toggle the switch. The relationship between the switch and the locking member is simple; only abutment is required, eliminating the need for assembly. This simplifies the structure and assembly steps, facilitating production.

[0020] Preferably, a power-assisting mechanism is provided between the crossbeam and the main body, and is configured to constantly apply an upward elastic force to the main body. The power-assisting mechanism comprises a power-assisting elastic member and a flexible connector, one end of the power-assisting elastic member being fixedly connected to the crossbeam, the other end of the power-assisting elastic member being connected to one end of the flexible connector, and the other end of the flexible connector being connected to the main body. When the main body slides downward relative to the crossbeam, the elastic force of the power-assisting elastic member increases, and when the main body slides upward relative to the crossbeam, the elastic force of the power-assisting elastic member decreases. The power-assisting mechanism provides power when the main body rises and provides cushioning when the main body descends.

[0021] Preferably, the flexible connector is disposed at the lower end of the main body, and includes a hidden section within the crossbeam and an exposed section exposed from the crossbeam. The length of the flexible connector remains constant, and the sum of the lengths of the hidden section and the assisting elastic member remains constant. When the main body slides downward relative to the crossbeam, the length of the exposed section increases, the length of the hidden section decreases, and the assisting elastic member becomes longer and its elastic force increases. Due to the constant length of the flexible connector, the assisting elastic member changes in length as the main body moves, thereby changing the elastic force of the assisting elastic member. When the main body descends, the elastic force increases to provide cushioning. When the main body rises from the lower position, the assisting elastic member can provide a greater upward elastic force to provide assistance.

[0022] As a preferred embodiment, a relief hole is provided on the crossbeam, a flexible connector extends out of the relief hole, a pulley is provided in the crossbeam above the relief hole, the flexible connector is a pull rope, and a power-assist mechanism is provided on the left and right sides to maintain the power-assist balance.

[0023] Preferably, the main body comprises a vertically arranged lifting housing, in which the crossbeam, lifting mechanism, and locking mechanism are all located. The lifting housing is provided with a lifting slot to avoid the crossbeam. A window is also provided in the lifting housing to expose the switch. This conceals the mechanism, so that consumers can only see the main body and crossbeam, while also increasing safety. The window exposes the switch, facilitating unlocking and lifting. The user simply flips the switch and pinches or holds the main body to move it up and down with one hand to complete the lifting and lowering adjustment.

[0024] Preferably, the main body also includes a screen plate, the lifting shell includes an outer shell and an inner shell, the inner shell is fixedly connected to the screen plate, the outer shell is fixedly connected to the inner shell, and baffles extend from the left and right ends of the inner shell toward the outer shell, and the fixing member is located between the baffles.

[0025] Preferably, a connecting plate is extended from the upper end and the lower end of the outer shell toward the outer shell, and the connecting plate is located on the outer side of the baffle.

[0026] Preferably, the main body comprises a screen panel, and the outer edge of the screen panel is provided with a surrounding piece arranged along the contour thereof. The surrounding piece is harder, and is generally made of metal or hard plastic while the screen panel is made of wood, plastic or glass, so as to protect the screen panel from damage during transportation.

[0027] Preferably, a slide groove is provided on the side of the main member, and a guide member is provided on the crossbeam. The guide member is located on the side of the main member and in the slide groove, and the guide member and the slide groove slide together. The guide member and the slide groove provide a guide for the main member to be raised and lowered, ensuring the stability of the main member during raising and lowering, while preventing shaking.

[0028] A table comprises a table top, table legs and the above-mentioned movable screen device, wherein the crossbeam is provided with a mounting piece extending forward, and the mounting piece is fixedly connected to the table top or the table legs.

[0029] Preferably, the main body is located behind the table top, the crossbeam is located behind the main body, and the mounting parts are arranged at the left and right ends of the crossbeam.

[0030] The design starting point, concept and beneficial effects of the present invention using the above technical solution are: First of all, the crossbeam is matched with the main body that can slide up and down, and the lifting mechanism driven by the rotating parts and fixed parts is combined to realize the flexible lifting function of the desktop screen. The height can be quickly adjusted according to the user's height and office scene requirements. It not only meets the privacy protection when concentrating on work, but also facilitates the creation of an open atmosphere during temporary collaboration, thereby improving the adaptability of the usage scenario.

[0031] Secondly, the advantages of the locking mechanism: the switch has a tendency to move downward and keep the locking mechanism in a locked state, holding the rotating part tightly in the locked state. Compared with the traditional method of relying on the self-locking ability of the mechanism itself, it effectively avoids the problem of sliding and sinking caused by gravity or load, ensuring that the screen stays stably at the target height; and when unlocking, you only need to lift the switch upwards, which is easy to operate and does not require complicated double operations like traditional screens with locking switches, which significantly improves the convenience of use.

[0032] In addition, this solution does not require complex drive devices such as hydraulics, pneumatic rods or motors, which simplifies the structure and reduces production costs. At the same time, it avoids the problems of dead weight or load slippage caused by the use of such devices, and is both economical and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the three-dimensional structure of the lifting table when the screen device is in the high position in the embodiment of the present invention Figure 1 ; Figure 2 Schematic diagram of the three-dimensional structure of the lifting table when the screen device is in the high position in the embodiment of the present invention Figure 2 ; Figure 3 This is a side view of the lift table when the screen device is in a high position in an embodiment of the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the lifting table when the screen device is in the low position in the embodiment of the present invention Figure 1 ; Figure 5 Schematic diagram of the three-dimensional structure of the lifting table when the screen device is in the low position in the embodiment of the present invention Figure 2 ; Figure 6 The three-dimensional structure of the movable screen device in the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 7 The three-dimensional structure of the movable screen device in the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 8 is a cross-sectional view of the movable screen device in an embodiment of the present invention; Figure 9 Schematic diagram of the three-dimensional structure of the lifting shell in an embodiment of the present invention; Figure 10 This is a schematic diagram of a three-dimensional structure in which a lifting mechanism and a locking mechanism are arranged in a lifting housing in an embodiment of the present invention; Figure 11 The explosion of the locking mechanism in the embodiment of the present invention Figure 1 ; Figure 12 The explosion of the locking mechanism in the embodiment of the present invention Figure 2 ; Figure 13 Schematic diagram of the three-dimensional structure of the power assist mechanism in an embodiment of the present invention; Figure 14 This is a schematic diagram of the three-dimensional structure of the flexible connector extending from the beam in an embodiment of the present invention.

[0034] The reference numerals are: table top 1; table frame 2; lifting table legs 3; main body 4; screen plate 41; lifting shell 42; outer shell 421; connecting plate 4210; inner shell 422; baffle 4220; lifting slot 423; window 424; surrounding member 43; slide slot 44; storage plate 5; vertical plate 51; notch 510; connecting piece 6; crossbeam 7; mounting member 71; guide member 72; wheel seat 73; pulley 74; avoidance hole 75; Slider 76; adjustment slot 77; rotating member 8; fixing member 9; bearing 10; sleeve 11; limiting protrusion 111; switch 12; control part 121; rotating part 122; limiting part 1221; abutting part 1222; locking member 13; locking part 131; sliding protrusion 1311; following part 132; locked member 14; meshing teeth 15; assisting elastic member 16; flexible connecting member 17; hidden section 171; exposed section 172. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0037] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] The specific implementation of the present invention is as follows: like Figure 1-8 As shown, the present invention provides a movable screen device, which is applied to a lifting table. The lifting table includes a table top 1, a table frame 2, lifting table legs 3 and a movable screen device. The movable screen device includes a main body 4 and a crossbeam 7. The crossbeam 7 is horizontally arranged in the left and right directions. The crossbeam 7 is configured as the main support of the movable screen device. The main body 4 is lifted and slidably set on the crossbeam 7. The main body 4 serves as the main body of the screen and plays the role of a screen, that is, it is used to block the line of sight; the table top 1 is arranged above the table frame 2, and the lifting table legs 3 are arranged below the table frame 2. A forward-extending mounting member 71 is respectively provided at the left and right ends of the crossbeam 7, and the mounting member 71 is fixedly connected to the table frame 2 by screws, thereby realizing the installation of the movable screen device and the table top 1 or the lifting table leg 3 fixing tube; the main body 4 is located behind the table top 1, and the crossbeam 7 is located behind the main body 4.

[0039] The movable screen device also includes a lifting mechanism, a locking mechanism and a power-assisting mechanism. The movable screen device is a device in which the main body 4 can be lifted and lowered, so a lifting mechanism is required to achieve its lifting and lowering. After the main body 4 is lifted and lowered, it needs to be locked by the locking mechanism to maintain the height of the main body 4 at this time. The main body 4 of the movable screen device is manually controlled, so a power-assisting mechanism is also required to achieve labor-saving operation.

[0040] Specifically: like Figure 6-10 As shown, the main body 4 includes a screen plate 41 and a lifting shell 42. The lifting shell 42 is vertically arranged in the middle of the screen plate 41 in the left and right directions. The lifting shell 42 is provided with a lifting groove 423 for avoiding the beam 7. The beam 7, the lifting mechanism and the locking mechanism are all located in the lifting shell 42; the beam 7 is a hollow structure open to the front and closed to the rear, and the lifting mechanism, the locking mechanism and the power-assisting mechanism are basically located inside the lifting shell 42 and the beam 7; the lifting shell 42 includes an outer shell 421 and an inner shell 422. The inner shell 422 is fixedly connected to the screen plate 41, and the outer shell 421 is fixedly connected to the inner shell 422. The left and right ends of the inner shell 422 extend toward the outer shell 421 with baffles 4220, and the upper and lower ends of the outer shell 421 both extend toward the outer shell 421 with connecting plates 4210, and the connecting plates 4210 are located on the outside of the baffle 4220.

[0041] The outer edge of the screen panel 41 is provided with a surrounding member 43 arranged along its contour, which is used to protect the screen panel 41; the left and right side surfaces of the surrounding member 43 are provided with a slide groove 44, and the crossbeam 7 is provided with a guide member 72, which is located on the side of the screen panel 41 and is set in the slide groove 44. The guide member 72 and the slide groove 44 slide together; the cooperation between the guide member 72 and the slide groove 44 serves as a lifting guide, which is beneficial to the lifting stability of the main member 4; the guide member 72 is specifically arranged on the mounting member 71 extending forward. The surrounding member 43 is harder. Generally, the screen panel 41 is made of wood, plastic or glass, while the surrounding member 43 is made of metal or hard plastic to protect the screen panel 41 and prevent it from being damaged during transportation.

[0042] The lifting mechanism includes a rotating part 8 and a fixed part 9. The rotating part 8 is rotatably set on the main part 4 and rises and falls synchronously with the main part 4. The fixed part 9 is fixedly set on the crossbeam 7 and is located between the baffles 4220. The rotating part 8 and the fixed part 9 are transmission connected; when the main part 4 is lifted or lowered, the rotating part 8 rotates under the action of the fixed part 9; the lifting mechanism is a screw rod and nut assembly, the rotating part 8 is a screw rod, and the fixed part 9 is a nut. The rotating part 8 is vertically set in the lifting shell 42 of the main part 4, and the rotating part 8 and the fixed part 9 are connected by threaded transmission.

[0043] like Figure 10-12As shown, the locking mechanism is arranged on the main body 4, and has a locked state and an unlocked state. In the unlocked state, the main body 4 moves up and down, and in the locked state, the lifting of the main body 4 is locked by rotating the locking rotating member 8; the locking mechanism includes a sleeve 11, a switch 12, a locking member 13 and a locked member 14. The sleeve 11 is fixedly arranged on the inner shell 422 and is located between the two baffles 4220. A bearing 10 is provided in the sleeve 11, one end of the rotating member 8 is arranged in the bearing 10, and the locked member 14 is synchronously rotated and arranged at the end of the rotating member 8 and is located in the sleeve 11. The locked member 14 is located above the bearing 10 and is closer to the locking member 13 relative to the bearing 10; the switch 12 is rotatably arranged on the sleeve 11 around the axis in the left and right directions, that is, the switch 12 and the locking member 13 are connected. The main body 4 is relatively movable, and the switch 12 is configured to control the state of the locking mechanism; the locking member 13 is floatingly arranged on the sleeve 11 and abuts against the switch 12, and the locking member 13 is selectively locked with the locked member 14. When the locking member 13 moves downward and approaches the locked member 14, it is locked with the locked member 14, and when the locking member 13 moves upward and moves away from the locked member 14, it is unlocked; the switch 12 has a tendency to move downward and keep the locking mechanism in the locked state, and this tendency may be caused by the deadweight of the switch 12 and the locking member 13; in the locked state, the locking mechanism holds the rotating member 8 and keeps the main body 4 and the beam 7 relatively stationary; when the switch 12 moves upward and is lifted, the locking mechanism is in the unlocked state, and the rotating member 8 can rotate so that the main body 4 can slide up and down relative to the beam 7.

[0044] Furthermore, the locking member 13 includes a locking portion 131 and a following portion 132 fixed to each other. The locking portion 131 is slidably arranged in the sleeve 11, and the following portion 132 protrudes from the locking portion 131 in the horizontal direction and is located above the switch 12. The following portion 132 is always in contact with the switch 12 and moves with the rotation of the switch 12; when the switch 12 rotates downward, the locking member 13 slides downward accordingly, the locking member 13 falls and locks the locking portion 131 and the locked member 14, and the locking mechanism is in a locked state; when the switch 12 rotates upward, the locking member 13 slides upward accordingly, the locking member 13 is lifted and the locking portion 131 is disengaged from the locked member 14, and the locking mechanism is in an unlocked state; both the locking portion 131 and the locked member 14 are provided with meshing teeth 15, and the meshing teeth 15 are arranged circumferentially on the locking portion 131 and the locked member 14.

[0045] The switch 12 includes a laterally arranged control portion 121 and a rotating portion 122 located on both sides of the control portion 121. The rotating portion 122 is rotatably connected to the sleeve 11, and the control portion 121 is configured for a user to operate the switch 12 to rotate; the rotating portion 122 has a limiting portion 1221 and an abutting portion 1222. A limiting protrusion 111 corresponding to the limiting portion 1221 is protruded on the sleeve 11. The limiting protrusion 111 is located below the switch 12. When the limiting portion 1221 abuts against the limiting protrusion 111 downward, the locking member 13 is locked with the rotating member 8; the abutting portion 1222 is located above the limiting portion 1221, and the abutting portion 1222 is configured to always abut against the locking member 13; the limiting protrusion 111 is tilted in the front-to-back direction, and the rotating portion 122 is also tilted. In the locked state, the two abut. In the unlocked state, the control portion 121 is horizontal, which is convenient for the user to directly move the main body 4 upward or downward; a window 424 is also provided on the lifting shell 42 to expose the switch 12.

[0046] A downward pressure spring (not shown) is provided on the upper end surface of the follower portion 132 , which abuts against the inner shell 422 . The downward pressure spring is configured to always give elastic force to the locking member 13 to slide downward, that is, to give elastic force to the switch 12 to rotate downward.

[0047] The locking portion 131 is provided with a plurality of sliding protrusions 1311 , which slide in cooperation with the inner wall of the sleeve 11 , thereby reducing friction and facilitating the sliding of the locking member 13 .

[0048] like Figure 10 、 13 As shown in Figures 1 and 14, the power-assisting mechanism is arranged on the main body 4 and the cross beam 7. The power-assisting mechanism is configured to always give the main body 4 an upward elastic force. A power-assisting mechanism is provided on each side of the lifting shell 42 to maintain the balance of the auxiliary lifting force; the power-assisting mechanism includes a power-assisting elastic member 16 whose elastic force changes with length and a flexible connecting member 17 with a constant length. One end of the power-assisting elastic member 16 is fixedly connected to the cross beam 7, and the other end of the power-assisting elastic member 16 is connected to one end of the flexible connecting member 17. The other end of the flexible connecting member 17 is connected to the main body 4. The power-assisting elastic member 16 gives the main body 4 an upward elastic force through the flexible connecting member 17; when the main body 4 slides downward relative to the cross beam 7, the elastic force of the power-assisting elastic member 16 increases, and when the main body 4 slides upward relative to the cross beam 7, the elastic force of the power-assisting elastic member 16 decreases; the power-assisting mechanism provides assistance when the main body 4 rises on the one hand, and provides buffering when the main body 4 descends on the other hand.

[0049] The flexible connector 17 is arranged at the lower end of the main body 4. The flexible connector 17 includes a hidden section 171 located in the beam 7 and an exposed section 172 exposed from the beam 7. The length of the flexible connector 17 remains unchanged. The power-assisting elastic member 16 and the hidden section 171 are arranged in the left and right directions. The sum of the lengths of the hidden section 171 and the power-assisting elastic member 16 remains unchanged. When the main body 4 slides downward relative to the beam 7, the length of the exposed section 172 increases, the length of the hidden section 171 decreases, the power-assisting elastic member 16 becomes longer and the elastic force increases.

[0050] The power-assisting elastic member 16 is a tension spring, and the flexible connecting member 17 is a pull rope. The power-assisting elastic member 16 is arranged inside the crossbeam 7. A wheel seat 73 is fixed inside the crossbeam 7. A pulley 74 is rotatably provided on the wheel seat 73. The flexible connecting member 17 abuts against the pulley 74 and bends and turns through the pulley 74. An avoidance hole 75 is provided on the crossbeam 7. After the flexible connecting member 17 bends and turns, it extends out of the crossbeam 7 from the avoidance hole 75.

[0051] A slider 76 is provided in the crossbeam 7, and the power-assisting elastic member 16 is connected to the slider 76. The slider 76 is set in the crossbeam 7 for sliding along the left and right directions. An adjustment structure is provided between the crossbeam 7 and the slider 76, and the position of the slider 76 along the left and right directions is locked by the adjustment structure; the slider 76 is used to adjust the elastic force of the power-assisting elastic member 16; the adjustment structure includes an adjustment groove 77 and an adjustment bolt, and the adjustment groove 77 is arranged on the crossbeam 7 along the left and right directions, and the adjustment bolt is locked on the slider 76 through the adjustment groove 77.

[0052] The upper end of the main body 4 is provided with a table surface for placing items. Specifically, a storage plate 5 is fixedly provided on the upper end of the main body 4, and the length of the storage plate 5 in the front-to-back direction is greater than the thickness of the main body 4 in the front-to-back direction; the upper end of the main body 4 is provided with an L-shaped connecting piece 6, which is fixedly connected to the main body 4 and the storage plate 5 respectively.

[0053] The locking mechanism is located at the upper end of the lifting shell 42 and close to the upper edge of the main body 4. A vertical plate 51 is provided at the rear of the storage plate 5 to prevent items from falling, and a notch 510 is provided on the vertical plate 51 above the lifting shell 42 or the locking mechanism. The distance between the lower end of the notch 510 and the switch 12 is configured to enable the user to cover it with one hand; the switch 12 is exposed from the window 424. When operating, the user only needs to place one hand in the window 424 and the notch 510 at the same time, flip the switch 12 upward and pinch the main body 4 to move it up and down to complete the lifting adjustment.

Claims

1. A movable screen device, characterized in that: include: a crossbeam configured as a main support for the device; The main body is slidably arranged on the crossbeam; The lifting mechanism includes a rotating member and a fixed member. The rotating member is rotatably mounted on the main member and rises and falls synchronously with the main member. The fixed member is fixedly mounted on the crossbeam and is in transmission connection with the fixed member. When the main member is raised or lowered, the rotating member rotates under the action of the fixed member. A locking mechanism is provided on the main body, the locking mechanism includes a switch, the switch is movably provided relative to the main body, and the switch is configured to control the state of the locking mechanism; The locking mechanism has a locked feature and an unlocked state, and the switch has a tendency to move downward and maintain the locking mechanism in the locked state; In the locked state, the locking mechanism holds the rotating part and keeps the main part and the beam relatively stationary; when the switch moves upward and is lifted, the locking mechanism is in the unlocked state, the rotating part can rotate so that the main part can slide up and down relative to the beam.

2. The movable screen device according to claim 1, characterized in that: The upper end of the main body is provided with a table top for placing items.

3. The movable screen device according to claim 2, characterized in that: A storage plate is fixedly provided on the upper end of the main body, and the length of the storage plate in the front-to-back direction is greater than the thickness of the main body in the front-to-back direction.

4. The movable screen device according to claim 3, characterized in that: An L-shaped connecting piece is provided at the upper end of the main body, and the connecting piece is fixedly connected to the main body and the storage plate.

5. The movable screen device according to claim 1, characterized in that: The rotating part and the fixed part are connected through thread transmission.

6. The movable screen device according to claim 1, characterized in that: The lifting mechanism is a screw rod and nut assembly, the rotating part is the screw rod, the fixed part is the nut, and the rotating part is vertically arranged on the main body.

7. The movable screen device according to claim 1, characterized in that: The locking mechanism also includes a sleeve, a locking piece and a locked piece. The sleeve is fixedly arranged on the main body, and the switch is rotatably arranged on the sleeve around an axis in the left and right directions. A bearing is provided in the sleeve, and one end of the rotating piece is arranged in the bearing. The locked piece is arranged at this end of the rotating piece and is located in the sleeve, and the locked piece is close to the locking piece relative to the bearing. The locking piece includes a locking part and a following part that are fixed to each other. The locking part is slidably arranged in the sleeve, and the following part abuts against the switch and moves with the rotation of the switch. When the switch rotates downward, the locking piece slides downward accordingly and locks the locking part and the locked piece, and the locking mechanism is in a locked state. When the switch rotates upward, the locking piece slides upward accordingly and disengages the locking part and the locked piece, and the locking mechanism is in an unlocked state.

8. The movable screen device according to claim 7, characterized in that: The locking portion and the locked piece are both provided with meshing teeth, and the meshing teeth are arranged on the locking portion and the locked piece along the circumferential direction.

9. The movable screen device according to claim 7, characterized in that: A downward pressure spring is provided on the upper end surface of the support follower part, the downward pressure spring abuts against the main body part, and the downward pressure spring is configured to always give the locking part an elastic force to slide downward.

10. The movable screen device according to claim 7, characterized in that: The switch has a control part, a limit part and an abutment part. A limit protrusion corresponding to the limit part is protruded on the sleeve. The limit protrusion is located below the switch. When the limit part is downwardly abutted against the limit protrusion, the locking mechanism is in a locked state; the abutment part is located above the limit part and is configured to always abut against the locking piece; the control part is configured to allow the user to toggle the switch.

11. The movable screen device according to claim 1, characterized in that: A power-assisting mechanism is also provided between the crossbeam and the main body, and the power-assisting mechanism is configured to always give the main body an upward elastic force; the power-assisting mechanism includes a power-assisting elastic member and a flexible connecting member, one end of the power-assisting elastic member is fixedly connected to the crossbeam, the other end of the power-assisting elastic member is connected to one end of the flexible connecting member, and the other end of the flexible connecting member is connected to the main body; when the main body slides downward relative to the crossbeam, the elastic force of the power-assisting elastic member increases, and when the main body slides upward relative to the crossbeam, the elastic force of the power-assisting elastic member decreases.

12. The movable screen device according to claim 11, characterized in that: The flexible connector is arranged at the lower end of the main body, and the flexible connector includes a hidden section located in the crossbeam and an exposed section exposed from the crossbeam. The length of the flexible connector remains unchanged, and the sum of the lengths of the hidden section and the assisting elastic member remains unchanged; when the main body slides downward relative to the crossbeam, the length of the exposed section increases, the length of the hidden section decreases, the assisting elastic member becomes longer and the elastic force increases.

13. The movable screen device according to claim 11, characterized in that: An avoidance hole is provided on the crossbeam, a flexible connecting piece extends out from the avoidance hole, and a pulley is provided in the crossbeam above the avoidance hole.

14. The movable screen device according to claim 1, characterized in that: The main body includes a vertically arranged lifting shell, in which the crossbeam, lifting mechanism and locking mechanism are all located. The lifting shell is provided with a lifting groove for avoiding the crossbeam; a window is also provided on the lifting shell to expose the switch.

15. The movable screen device according to claim 14, characterized in that: The main body also includes a screen plate, and the lifting shell includes an outer shell and an inner shell. The inner shell is fixedly connected to the screen plate, and the outer shell is fixedly connected to the inner shell. Baffles extend from the left and right ends of the inner shell toward the outer shell, and the fixing member is located between the baffles.

16. The movable screen device according to claim 15, characterized in that: The upper end and the lower end of the outer shell are both provided with connecting plates extending toward the outer shell, and the connecting plates are located on the outer side of the baffle.

17. The movable screen device according to claim 1, characterized in that: The main body comprises a screen board, and the outer edge of the screen board is provided with a surrounding piece arranged along the outline of the screen board.

18. The movable screen device according to claim 1, characterized in that: A slide groove is provided on the side of the main body, and a guide piece is provided on the crossbeam. The guide piece is located on the side of the main body and in the slide groove, and the guide piece is slidably matched with the slide groove.

19. A table, characterized in that: It comprises a table top, table legs and a movable screen device as described in any one of claims 1 to 18, wherein the crossbeam is provided with a mounting piece extending forward, and the mounting piece is fixedly connected to the table top or the table legs.

20. The table according to claim 19, characterized in that: The main body is located behind the table top, the crossbeam is located behind the main body, and the mounting parts are arranged at the left and right ends of the crossbeam.

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