Lifting screen with anti-pinch function

Abstract

The utility model relates to the technical field of lifting screens, in particular to a lifting screen with an anti-pinch function. The device comprises a case hinged with a cabin door; the display screen is arranged in the case in a lifting manner; the lifting driving mechanism is arranged in the case, and the lifting driving mechanism is used for driving the display screen to do lifting motion; the transmission mechanism is arranged in the case, and the transmission mechanism is used for driving the cabin door to be opened or closed; the correlation sensors are used for detecting whether external interferents exist at the cabin door or not, and the correlation sensors are at least arranged on the two opposite sides of the cabin door; and the correlation sensor and the lifting driving mechanism are respectively and electrically connected with the control unit. By means of the structure, the lifting screen has the hand pinching prevention function, and meanwhile the lifting screen has the advantages of being simple in structure and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lift screen, concretely is a lift screen with anti -pinching function. BACKGROUND

[0002] With the continuous development of modern society, gradually extended the concept of paperless conference system, paperless conference system has the characteristics such as convenient and efficient, environmental protection, cost saving, has been widely used in more meeting places. Among them, the lift display screen is one of the more important components in paperless conference system, when the display screen is needed, the lift hidden in the conference table lifts the display screen from the conference table below to the outside, convenient for user to watch, when the display screen is not needed, the lift drives the display screen to descend automatically, and the display screen is hidden in the conference table, has the characteristics of theftproof and dustproof, can also keep the neatness and beauty of the conference table surface.

[0003] But in the actual use process, since the display screen is installed in the conference table inside through the machine box, the fingers or other foreign matters of the user can easily contact the hatch of the machine box, therefore, the display screen is prone to finger injury or other foreign matters during lifting, and the use is relatively inconvenient. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a lift screen with anti -pinching function, aiming at solving the problem that the existing lift display screen is not equipped with anti -pinching device, and is prone to finger injury or other foreign matters.

[0005] To achieve the above object, the utility model provides a lift screen with anti -pinching function, including the machine box, its hinged hatch is set up,

[0006] The display screen is lifted and arranged in the machine box,

[0007] The lifting drive mechanism is arranged in the machine box, and the lifting drive mechanism is used to drive the display screen to lift and move,

[0008] The transmission mechanism is arranged in the machine box, and the transmission mechanism is used to drive the hatch to open or close,

[0009] The pair of sensors are used to detect whether there is external interference at the hatch, and the pair of sensors are arranged on the opposite sides of the hatch,

[0010] The control unit is electrically connected with the pair of sensors and the lifting drive mechanism, so that when the pair of sensors detects that there is external interference at the hatch, the control unit controls the lifting drive mechanism to maintain the display screen in the descending state.

[0011] Preferably, the lifting driving mechanism comprises a driving member, a driving wheel, a driven wheel, a synchronous belt and a guide assembly, the driving member, the driving wheel, the driven wheel and the guide assembly are all arranged in the cabinet, the output end of the driving member is connected with the driving wheel, the driving wheel and the driven wheel are connected with each other through the synchronous belt, and the guide assembly is located on one side of the synchronous belt.

[0012] The lower end of the display screen is provided with a fixing assembly, and the fixing assembly is connected with the synchronous belt and the guide assembly respectively.

[0013] Preferably, the transmission mechanism comprises a positioning column and a rotary driving assembly, two positioning columns are arranged in the cabinet, and the two ends of the hatch are both provided with a first rotating shaft, and the two first rotating shafts are respectively hingedly arranged on the corresponding positioning columns.

[0014] The rotary driving assembly is arranged in the cabinet, and the rotary driving assembly is connected with the hatch and used for driving the hatch to rotate to realize the opening or closing of the hatch.

[0015] Preferably, the rotary driving assembly comprises a sliding rod, an elastic connecting piece, a fixing seat, a second rotating shaft and a rotating piece, the sliding rod is arranged in the cabinet in an ascending and descending mode, the fixing seat is installed at the top end in the cabinet, one end of the elastic connecting piece is connected with the sliding rod, and the other end of the elastic connecting piece is connected with the fixing seat.

[0016] The middle part of the fixing seat is provided with the second rotating shaft, the second rotating shaft is connected with the rotating piece, the top end of the sliding rod is provided with a movable bolt, an arc-shaped movable slot for the movable bolt to slide is formed in the fixing seat, the movable bolt passes through the arc-shaped movable slot and is connected with one end of the rotating piece, the other end of the rotating piece is provided with a movable rod, and the sidewall of the hatch is provided with a sliding groove, and the movable rod is movably arranged in the sliding groove.

[0017] Preferably, the rotary driving assembly further comprises a push plate and an elastic piece, one end of the push plate is connected with the fixing assembly, the other end of the push plate is movably connected on the sliding rod, the elastic piece is installed at the bottom end of the sliding rod, and the bottom end of the push plate abuts against the elastic piece.

[0018] Preferably, the guide assembly comprises a guide rail and a sliding block, the guide rail is vertically arranged in the cabinet, the sliding block is movably arranged on the guide rail, and the fixing assembly is connected with the sliding block.

[0019] Preferably, the transmission mechanism further comprises an adjusting piece, the adjusting piece is threadedly connected at the bottom end of the sliding rod, and the elastic piece is located at the upper end of the adjusting piece.

[0020] Preferably, the elastic connecting piece is a tension spring, and the elastic piece is a compression spring.

[0021] Preferably, the pair of infrared sensors are arranged on the left and right sides of the hatch respectively through the mounting plate.

[0022] Preferably, the case is provided with at least a switch button and a control button, the switch button is electrically connected with the display screen, and the control button is electrically connected with the control unit.

[0023] The utility model discloses a lift screen with anti -pinching function has the following beneficial effects: through being equipped with the pair of infrared sensors at the hatch, the display screen is in the detection state in the lifting process, when detecting the existence finger or other external interference, and the pair of infrared sensors receives the abnormal signal, and the control unit receives this level change, and sends the instruction control lift drive mechanism and stops working, and the display screen will not extend to the outside, avoids the finger and so on external interference and is pinched by the display screen, causes the injury accident, when the finger or other external interference removes, and lift drive mechanism restores normal working condition, makes the lift screen of this scheme to have anti -pinching function, also has simple structure, low -cost characteristics. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other drawings according to the mechanism shown in these drawings.

[0025] Figure 1 It is a structure schematic diagram that the lift screen with anti -pinching function of the utility model is in the falling state.

[0026] Figure 2 It is a structure schematic diagram that the lift screen with anti -pinching function of the utility model is in the rising state.

[0027] Figure 3 It is an explosion map of the lift screen with anti -pinching function of the utility model.

[0028] Figure 4 It is an explosion map of the lift screen with anti -pinching function of the utility model part structure.

[0029] Figure 5 It is the side view of the inside when the hatch of the lift screen with anti -pinching function of the utility model is closed.

[0030] Figure 6 It is the side view of the inside when the hatch of the lift screen with anti -pinching function of the utility model is opened.

[0031] Figure 7 Part structure diagram of the lifting screen with the hand clamping prevention function of the utility model is shown in the figure;

[0032] Figure 8 Part structure diagram of the cabin door of the lifting screen with the hand clamping prevention function of the utility model is shown in the figure;

[0033] Figure 9 Part structure diagram of the fixed seat of the lifting screen with the hand clamping prevention function of the utility model is shown in the figure;

[0034] Figure 10 Part structure diagram of the rotating part of the lifting screen with the hand clamping prevention function of the utility model is shown in the figure.

[0035] In the drawing, 1 - case, 11 - cabin door, 111 - first rotating shaft, 112 - sliding groove, 12 - panel, 2 - display screen, 3 - lifting driving mechanism, 31 - driving part, 32 - driven wheel, 33 - synchronous belt, 34 - guide assembly, 341 - guide rail, 342 - sliding block, 4 - transmission mechanism, 41 - positioning column, 42 - rotating driving assembly, 421 - sliding rod, 422 - elastic connecting part, 423 - fixed seat, 4231 - arc-shaped movable groove, 4232 - bearing, 424 - second rotating shaft, 425 - rotating part, 4251 - movable rod, 426 - movable bolt, 427 - push plate, 428 - elastic part, 43 - adjusting part, 5 - pair of emitting sensors, 51 - mounting plate, 6 - fixed assembly, 71 - switch button, 72 - control button.

[0036] The utility model discloses the realization, functional characteristics and advantages will be further explained with reference to the embodiment. Specific implementation

[0037] The technical scheme in the embodiment of the utility model will be described clearly and completely in the embodiment of the utility model in combination with the drawings, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of the utility model protection.

[0038] It should be noted that if the embodiment of the utility model involves directionality indication, the directionality indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, and if the certain posture changes, the directionality indication also changes accordingly.

[0039] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0040] As shown in Figures 1 to 10 A lifting screen with anti-pinch function, comprising a cabinet 1, which is hingedly provided with a hatch 11;

[0041] A display screen 2 is arranged in the cabinet 1;

[0042] A lifting drive mechanism 3 is arranged in the cabinet 1, and the lifting drive mechanism 3 is used to drive the display screen 2 to move up and down;

[0043] A transmission mechanism 4 is arranged in the cabinet 1, and the transmission mechanism 4 is used to drive the hatch 11 to open or close;

[0044] A pair of photoelectric sensors 5 are arranged on the opposite sides of the hatch 11, and the photoelectric sensors 5 are used to detect whether there is an external interference object at the hatch 11;

[0045] A control unit is electrically connected with the photoelectric sensors 5 and the lifting drive mechanism 3, so that when the photoelectric sensors 5 detect that there is an external interference object at the hatch 11, the control unit controls the lifting drive mechanism 3 to maintain the display screen 2 in a lowered state.

[0046] Most of the mechanisms and parts in the scheme are installed in the interior of the cabinet 1, and the display screen 2 can be extended to the outside of the cabinet 1 through the opening of the cabinet 1. The display screen 2 is mainly driven to move up and down by the lifting drive mechanism 3, and the lifting drive mechanism 3 can be composed of a motor / hydraulic system, a lifting platform and the like. In order to avoid the entry of external foreign matters or dust into the cabinet 1, when the display screen 2 is not used, the hatch 11 is in a closed state, and when the display screen 2 needs to be lifted, the hatch 11 is opened by the transmission mechanism 4, and then the display screen 2 is extended to the outside of the cabinet 1. The display screen 2 used in the embodiment can be a liquid crystal display screen 2.

[0047] In order to prevent the display screen 2 from being stretched out to cause hand clamping or foreign matter clamping, etc., the present scheme is provided with a pair of photoelectric sensors 5 at the cabin door 11, which can be arranged on the left and right sides of the cabin door 11. During the lifting process of the display screen 2, the photoelectric sensor 5 is in a detection state. When a finger or other external interference is detected, the photoelectric sensor 5 receives an abnormal signal (high level changes to low level), and the control unit receives the level change and sends a command to control the lifting driving mechanism 3 to stop working, so that the display screen 2 cannot be stretched out to the outside, avoiding the finger or other external interference being clamped by the display screen 2 to cause injury accidents. When the finger or other external interference is removed, the lifting driving mechanism 3 returns to the normal working state. That is, the lifting screen of the present scheme has the function of preventing hand clamping, and also has the characteristics of simple structure and low cost.

[0048] In other embodiments, the photoelectric sensors 5 can also be additionally arranged on the front and rear sides or other areas of the cabin door 11.

[0049] Further, the lifting driving mechanism 3 comprises a driving member 31, a driving wheel, a driven wheel 32, a synchronous belt 33 and a guide assembly 34, the driving member 31, the driving wheel, the driven wheel 32 and the guide assembly 34 are all arranged in the cabinet 1, the output end of the driving member 31 is connected with the driving wheel, the driving wheel and the driven wheel 32 are connected with each other through the synchronous belt 33, and the guide assembly 34 is located on one side of the synchronous belt 33.

[0050] The lower end of the display screen 2 is provided with a fixing assembly 6, and the fixing assembly 6 is connected with the synchronous belt 33 and the guide assembly 34 respectively.

[0051] The lifting driving mechanism 3 is powered by the driving member 31, which can be a direct-current speed reducer motor or the like. The driving motor drives the rotating wheel to rotate, and drives the driven wheel 32 to rotate through the synchronous belt 33. The driven wheel 32 is located above the driving wheel. Since the fixing assembly 6 of the display screen 2 is fixed with the synchronous belt 33, the fixing assembly 6 will synchronously lift during the rotation of the synchronous belt 33, so as to drive the display screen 2 to lift up and down. The synchronous belt 33 used in the present embodiment can be a belt or the like.

[0052] In order to ensure that the display screen 2 does not deviate during the lifting movement, the present embodiment further comprises a guide assembly 34 installed inside the cabinet 1, which can make the fixing assembly 6 lift vertically and avoid the display screen 2 deviating from the preset lifting path and being stuck.

[0053] Further, the transmission mechanism 4 comprises a positioning column 41 and a rotary driving assembly 42, and the cabinet 1 is provided with two positioning columns 41. The two ends of the cabin door 11 are provided with first rotating shafts 111, and the two first rotating shafts 111 are respectively hingedly arranged on the corresponding positioning columns 41.

[0054] The rotating driving assembly 42 is arranged in the cabinet 1 and connected with the hatch 11, and is used to drive the hatch 11 to rotate to realize the opening or closing of the hatch 11.

[0055] In the embodiment, the hatch 11 is rotatably connected to the cabinet 1 through the positioning column 41. Specifically, the first rotating shaft 111 at each end of the hatch 11 is sleeved into the positioning column 41, and the positioning column 41 is directly locked to the panel 12 of the cabinet 1 to fix the hatch 11. The transmission assembly is used to provide power for the rotation of the hatch 11, so that the hatch 11 is freely rotated to complete the closing.

[0056] The transmission assembly of the scheme can be composed of a motor, a cylinder, a hydraulic system, a connecting structure and the like.

[0057] Further, the rotating driving assembly 42 comprises a sliding rod 421, an elastic connecting piece 422, a fixed seat 423, a second rotating shaft 424 and a rotating piece 425. The sliding rod 421 is arranged in the cabinet 1 in an up-down manner. The fixed seat 423 is installed at the top end of the cabinet 1. One end of the elastic connecting piece 422 is connected with the sliding rod 421, and the other end thereof is connected with the fixed seat 423.

[0058] The middle part of the fixed seat 423 is provided with the second rotating shaft 424, and the second rotating shaft 424 is connected with the rotating piece 425. The top end of the sliding rod 421 is provided with a movable bolt 426. An arc-shaped movable slot 4231 is formed in the fixed seat 423 for the sliding of the movable bolt 426. The movable bolt 426 passes through the arc-shaped movable slot 4231 and is connected with one end of the rotating piece 425. The other end of the rotating piece 425 is provided with a movable rod 4251. The side wall of the hatch 11 is provided with a sliding groove 112, and the movable rod 4251 is movably arranged in the sliding groove 112.

[0059] As Figures 4 to 6As shown, in this embodiment, the rotating member 425 and the second rotating shaft 424 can be fixed by screws, and then the rotating shaft is inserted into the bearing 4232 of the fixed seat 423 and fixed with a retaining ring, so that the rotating member 425 can rotate freely, and the movable rod 4251 of the rotating member 425 is inserted into the slide groove 112. At this time, the rotating member 425 can push the hatch 11 to rotate freely through the cooperation between the movable rod 4251 and the slide groove 112; the movable bolt 426 passes through the through hole at the top of the slide rod 421, After passing through the arc-shaped movable groove 4231 of the fixing seat 423, it is locked to the rotating part 425. At this time, the rotating part 425 can be pushed by pulling the sliding rod 421, thereby indirectly pushing the opening and closing of the hatch 11. A fixing hole is also provided at the top of the sliding rod 421, and a fixing hole is provided on the side of the fixing seat 423 away from the arc-shaped movable groove 4231. The two ends of the elastic connecting member 422 are respectively fixed in the above-mentioned two fixing holes. At this time, under the action of the pulling force of the elastic connecting member 422, the hatch 11 is indirectly pushed to open.

[0060] Furthermore, the rotation drive assembly 42 also includes a push plate 427 and an elastic member 428. One end of the push plate 427 is connected to the fixed assembly 6, and the other end thereof is slidably connected to the slide rod 421. The elastic member 428 is installed at the bottom end of the slide rod 421, and the bottom end of the push plate 427 rests on the elastic member 428.

[0061] like Figures 5 to 6 As shown, in the initial state, the hatch 11 is in a closed state: the push plate 427 is always at the bottom to press the elastic member 428 (compression spring). At this time, the elastic connecting member 422 (tension spring) cannot pull the slide rod 421 upward, so the hatch 11 is always in a closed state.

[0062] When the display screen 2 rises: the driving member 31 drives the synchronous belt 33 to rotate, the fixed component 6, the display screen 2 and the push plate 427 rise a short distance at the same time, the push plate 427 no longer presses the elastic member 428 (compression spring), and the slide bar 421 moves up a short distance due to the tension of the elastic connecting member 428. When the slide bar 421 rises, the movable bolt 426 slides in the arc-shaped movable groove 4231, and the rotating member 425 rotates accordingly, driving the movable rod 4251 to move along the slide groove 112, so that the hatch 11 is opened after rotation and always remains in the open state, and the display screen 2 continues to rise until it extends out of the chassis 1.

[0063] When the display screen 2 descends: driven by the driving member 31, the synchronous belt 33 rotates again and drives the display screen 2, the fixing assembly 6 and the push plate 427 to descend. When the push plate 427 descends to press the elastic member 428 again, it will drive the slide rod 421 to move downward, so that the cabin door 11 is closed again.

[0064] Since the driving member 31 drives the synchronous belt 33 to rotate, the synchronous belt 33 can realize synchronous lifting of the fixed assembly 6, the display screen 2 and the push plate 427, thereby indirectly realizing the movement of the slide rod 421, only one power source is needed, the internal structure of the case 1 is simplified, and the cabin door 11 can be kept in an open state when the display screen 2 is lifted.

[0065] Further, the guide assembly 34 comprises a guide rail 341 and a sliding block 342, the guide rail 341 is vertically arranged in the case 1, and the sliding block 342 is movably arranged on the guide rail 341, and the fixed assembly 6 is connected with the sliding block 342.

[0066] In the embodiment, the guide rail 341 guides the lifting movement of the fixed assembly 6 and the display screen 2, since the guide rail 341 is vertically arranged in the case 1, and the fixed assembly 6 is movably arranged on the guide rail 341 through the sliding block 342, when the fixed assembly 6 is lifted, it can be limited from deviating in the vertical direction through the guide rail 341, so that the display screen 2 can be kept in a vertical state as much as possible when it is lifted.

[0067] Further, the transmission mechanism 4 further comprises an adjusting member 43, the adjusting member 43 comprises an elastic member 431 and an adjusting member 432, the push plate 427 is sleeved and fixed on the slide rod 421, the adjusting member 432 is screw-connected at the bottom end of the slide rod 421, and the elastic member 428 is located at the upper end of the adjusting member 432.

[0068] In the embodiment, the adjusting member 43 (i.e. adjusting nut) is arranged to adjust the fixed position of the push plate 427 and the slide rod 421, so that the initial fixed position of the push plate 427 on the slide rod 421 can be adjusted to be higher or lower, and when the driving member 31 drives the fixed assembly 6, the display screen 2 and the push plate 427 to lift by a small distance, the slide rod 421 can be moved to the open state of the cabin door 11 through the pulling force of the elastic connecting member 422. Specifically, the lower end of the slide rod 421 is sleeved into the elastic member 431, and then the adjusting member 432 is tightened, the upper end of the elastic member 431 abuts against the push plate 427, the lower end of the slide rod 421 is provided with an external thread, and the adjusting member 432 can be screwed and fixed at any position of the external thread section, thereby adjusting the fixed position of the push plate 427.

[0069] Further, the elastic connecting member 422 is a tension spring, and the elastic member 431 is a compression spring. In the embodiment, the elastic connecting member 422 is preferably a tension spring, which has strong resilience after deformation under force, can quickly return to the original state, and also can be stretched or compressed, and has strong stability and will not change obviously due to the change of external force. Of course, the elastic connecting member 422 can also be an elastic rope in other embodiments. The elastic member 431 in the embodiment is preferably a compression spring, which also has the advantages of strong stability and good resilience.

[0070] Further, the pair of sensors 5 are infrared pair of sensors 5, and the two infrared pair of sensors 5 are arranged on the left and right sides of the cabin door 11 through the mounting plate 51. The infrared pair of sensors 5 of the present scheme are arranged on the left and right sides of the cabin door 11 at the panel 12 of the cabinet 1, and are fixed on the panel 12 through the mounting plate 51; unlike the infrared sensor, the infrared pair of sensors 5 of the present scheme can effectively block any object that blocks the propagation of infrared rays, and when the external interference object enters the infrared pair of sensors area, the infrared rays will be interrupted, thereby triggering the switch, and the application range is wider.

[0071] Further, the cabinet 1 is provided with at least a switch button 71 and a control button 72, the switch button 71 is electrically connected with the display screen 2, and the control button 72 is electrically connected with the control unit. The switch button 71 and the control button 72 are arranged on the panel 12 of the cabinet 1, the switch button 71 is electrically connected with the display screen 2, and the display screen 2 can be controlled to be turned on and off; the control button 72 is electrically connected with the control unit, and the display screen 2 can be controlled to move up and down through the control unit by clicking the control button 72.

[0072] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent mechanism transformation or direct / indirect application in other related technical fields under the inventive concept of the present application is included in the patent protection range of the present application.

Claims

1. A lifting screen with anti-pinch function, characterized in that: include: A chassis (1) is hingedly provided with a door (11); A display screen (2) is arranged in a lifting manner within the chassis (1); A lifting drive mechanism (3) is arranged in the chassis (1), and the lifting drive mechanism (3) is used to drive the display screen (2) to perform lifting movement; a transmission mechanism (4) disposed in the chassis (1), the transmission mechanism (4) being used to drive the cabin door (11) to open or close; a through-beam sensor (5) for detecting whether an external interference object is present at the cabin door (11), wherein the through-beam sensor (5) is arranged at least on two opposite sides of the cabin door (11); The control unit is electrically connected to the through-beam sensor (5) and the lifting drive mechanism (3), respectively, so that when the through-beam sensor (5) detects the presence of an external interference object at the cabin door (11), the control unit controls the lifting drive mechanism (3) to keep the display screen (2) in a lowered state.

2. The lifting screen with anti-pinch function according to claim 1 is characterized in that: The lifting drive mechanism (3) comprises a driving member (31), a driving wheel, a driven wheel (32), a synchronous belt (33) and a guide assembly (34); the driving member (31), the driving wheel, the driven wheel (32) and the guide assembly (34) are all arranged in the chassis (1); the output end of the driving member (31) is connected to the driving wheel, the driving wheel and the driven wheel (32) are connected to each other through the synchronous belt (33), and the guide assembly (34) is located on one side of the synchronous belt (33); A fixing assembly (6) is provided at the lower end of the display screen (2), and the fixing assembly (6) is respectively connected to the synchronous belt (33) and the guide assembly (34).

3. The lifting screen with anti-pinch function according to claim 1 or 2, characterized in that: The transmission mechanism (4) includes a positioning column (41) and a rotation drive assembly (42), two positioning columns (41) are provided in the chassis (1), and first rotating shafts (111) are provided at both ends of the door (11), and the two first rotating shafts (111) are respectively hingedly arranged on the corresponding positioning columns (41); The rotary drive assembly (42) is arranged in the chassis (1), and the rotary drive assembly (42) is connected to the cabin door (11), and is used to drive the cabin door (11) to rotate to realize the opening or closing of the cabin door (11).

4. The lifting screen with anti-pinch function according to claim 3 is characterized in that: The rotary drive assembly (42) comprises a slide bar (421), an elastic connecting member (422), a fixed seat (423), a second rotating shaft (424) and a rotating member (425); the slide bar (421) is arranged to be lifted and lowered in the chassis (1); the fixed seat (423) is installed at the top end in the chassis (1); one end of the elastic connecting member (422) is connected to the slide bar (421), and the other end thereof is connected to the fixed seat (423); The middle part of the fixed seat (423) is provided with the second rotating shaft (424), and the second rotating shaft (424) is connected to the rotating member (425). The top end of the sliding rod (421) is provided with a movable bolt (426). The fixed seat (423) is provided with an arc-shaped movable groove (4231) for the movable bolt (426) to slide. The movable bolt (426) passes through the arc-shaped movable groove (4231) and is connected to one end of the rotating member (425). The other end of the rotating member (425) is provided with a movable rod (4251). The side wall of the hatch (11) is provided with a sliding groove (112), and the movable rod (4251) is movably arranged in the sliding groove (112).

5. The lifting screen with anti-pinch function according to claim 4 is characterized in that: The rotary drive assembly (42) further includes a push plate (427) and an elastic member (428), one end of the push plate (427) is connected to the fixed assembly (6), and the other end thereof is slidably connected to the slide rod (421), the elastic member (428) is mounted on the bottom end of the slide rod (421), and the bottom end of the push plate (427) rests on the elastic member (428).

6. The lifting screen with anti-pinch function according to claim 2, characterized in that: The guide assembly (34) comprises a guide rail (341) and a slider (342); the guide rail (341) is vertically arranged in the chassis (1); the slider (342) is movably arranged on the guide rail (341); and the fixing assembly (6) is connected to the slider (342).

7. The lifting screen with anti-pinch function according to claim 5, characterized in that: The transmission mechanism (4) further includes an adjusting member (43), wherein the adjusting member (432) is threadedly connected to the bottom end of the sliding rod (421), and the elastic member (428) is located at the upper end of the adjusting member (432).

8. The lifting screen with anti-pinch function according to claim 7, characterized in that: The elastic connecting member (422) is a tension spring, and the elastic member (428) is a compression spring.

9. The lifting screen with anti-pinch function according to claim 1, characterized in that: The said counter-radiation sensor (5) is an infrared counter-radiation sensor (5), and two said infrared counter-radiation sensors (5) are respectively arranged on the left and right sides of the said cabin door (11) through a mounting plate (51).

10. The lifting screen with anti-pinch function according to claim 1, characterized in that: The chassis (1) is provided with at least a switch button (71) and a control button (72); the switch button (71) is electrically connected to the display screen (2); and the control button (72) is electrically connected to the control unit.

Images