Screen obscuring device

Abstract

The present disclosure relates to the technical field of screen accessory, and provides a screen shielding device for shielding a screen, which comprises a shielding piece and a linkage mechanism; the shielding piece is arranged at the back side of the screen and at least partially extends out of the side of the screen; the linkage mechanism is in transmission connection with the shielding piece respectively; the shielding piece can be adjusted in length by being pushed and pulled; when the shielding piece is stretched by being pulled, the linkage mechanism synchronously drives the screen to move away from the shielding piece, and the shielding piece rotates towards the side of the screen; when the shielding piece is retracted by being pushed, the linkage mechanism synchronously drives the screen to move close to the shielding piece, and the shielding piece rotates away from the side of the screen. The screen shielding device has the beneficial effects of simple structure, convenient operation, being suitable for open office environment, and being capable of fully protecting the work privacy and secret of the user.

Description

Technical Field

[0001] This disclosure relates to the field of screen accessory technology, and in particular to a screen blocking device. Background Technology

[0002] Taking a common computer monitor as an example, a conventional computer monitor can only provide cover from the back, but cannot effectively cover the left and right sides. Such a computer monitor is particularly unsuitable for open office environments, as it is not conducive to creating a quiet and focused working environment for employees, nor is it conducive to protecting employees' privacy.

[0003] In view of this, there is an urgent need in the market for a screen blocking device that can adjust the obstruction of the left and right sides of the display screen, so that users can block the left and right sides of the computer screen according to their own needs. Summary of the Invention

[0004] This disclosure provides a screen blocking device to solve the problem that the left and right sides of the display screen in the prior art cannot be effectively blocked, making it unsuitable for open office environments.

[0005] The screen blocking device provided in this embodiment is used to block the screen, and includes a blocking component and a linkage mechanism.

[0006] The shielding member is disposed on the back side of the screen and extends at least partially out of the side of the screen;

[0007] The linkage mechanism is connected to the shielding component and the screen transmission respectively;

[0008] The shielding component can be pushed and pulled to adjust the length of itself extending out of the screen;

[0009] When the shielding member is stretched out, the linkage mechanism simultaneously drives the screen to move away from the shielding member, and the shielding member retracts and rotates toward the side of the screen.

[0010] When the blocking component is pushed back, the linkage mechanism simultaneously drives the screen to move closer to the blocking component, and the side of the blocking component away from the screen spreads and rotates.

[0011] In one possible embodiment, the screen blocking device further includes a mounting base;

[0012] The fixed base is spaced apart on the side of the shielding member facing away from the screen and is connected to the linkage mechanism for transmission.

[0013] When the blocking component is stretched or retracted, the linkage mechanism correspondingly drives the fixed base to move away from or towards the screen.

[0014] In one possible implementation, the linkage mechanism includes a rotating rod, a hinge, and a sliding groove;

[0015] One end of the rotating rod is hinged to the back side of the screen;

[0016] The hinge includes a hinge joint hinged in the shield and a swing rod connected to the hinge joint.

[0017] The sliding groove is formed in the fixed base, and the swing rod passes through the sliding groove and is hinged to the other end of the rotating rod;

[0018] When the blocking member is pushed or pulled:

[0019] The hinge joint rotates and causes the swing rod to slide along the sliding groove;

[0020] The rotation of the rotating rod changes the angle between the shielding member and the side of the screen, and also changes the distance between the screen and the fixed base.

[0021] In one possible implementation, the linkage mechanism further includes a positioning element disposed on the back side of the screen;

[0022] The positioning element is used to position and guide the screen away from or towards the mounting base, and is capable of being inserted into the mounting base at least partially.

[0023] In one possible implementation, the positioning element is a positioning guide strip vertically disposed on the back side of the screen;

[0024] The positioning guide strip has an oblong guide hole along its own extension direction, and the fixing seat is provided with a positioning pin inserted into the oblong guide hole.

[0025] As the screen moves away from or towards the fixed base, the positioning pin slides relative to the waist-shaped guide hole.

[0026] In one embodiment, two hinge joints are spaced apart along their own axial direction;

[0027] The swing arm includes a first sub-arm that is perpendicularly hinged to the two hinge joints respectively, and a second sub-arm that connects the two first sub-arms.

[0028] The second sub-rod passes through the sliding groove and is hinged to the other end of the rotating rod.

[0029] In one possible implementation, the blocking member includes a first sub-member and a second sub-member;

[0030] The first sub-component and the second sub-component are symmetrically arranged about the vertical central axis of the screen, and are respectively connected to the fixed base and the screen through their respective hinges.

[0031] In one embodiment, two rotating rods are symmetrically arranged about the central axis of the screen;

[0032] The two rotating rods are connected together at the center of the screen and are respectively hinged to the swing rods in the first sub-component and the second sub-component.

[0033] In one embodiment, a guide is also provided on the side of the screen;

[0034] The shielding component has a guide portion along its own extending direction;

[0035] The guide member is inserted into the guide portion and can slide back and forth along the guide portion when the blocking member is pushed and pulled.

[0036] In one possible implementation, the guide is a guide head that is tilted away from the side of the screen;

[0037] The guide portion is a guide groove extending along the direction of the shielding member, and the guide head is at least partially engaged and inserted into the guide groove.

[0038] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0039] When using the screen blocking device provided in this embodiment, the blocking member only needs to be gradually stretched out from the side of the screen, and the linkage mechanism will simultaneously drive the screen to move away from the blocking member, and the blocking member will gradually retract and rotate towards the side of the screen. The degree to which the side of the screen is blocked can be adjusted according to the degree to which the blocking member is stretched out from the side of the screen. When it is not necessary to block the left and right sides of the screen, the blocking member only needs to be pushed back from the side of the screen. At this time, the linkage mechanism can simultaneously drive the screen to move towards the blocking member, and the blocking member will gradually spread and rotate away from the side of the screen until it no longer blocks the side of the screen.

[0040] This screen blocking device can change the degree of obstruction on both sides of the screen by stretching or pushing the blocking component. It allows users to block the left and right sides of the screen to different degrees according to their work needs. It has the advantages of simple structure, convenient operation, suitability for open office environments, and full protection of users' work privacy and confidentiality.

[0041] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0042] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:

[0043] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0044] Figure 1 A top view of the screen blocking device provided in an embodiment of this disclosure is shown;

[0045] Figure 2 A front view (excluding the screen) of the screen blocking device provided in an embodiment of this disclosure is shown;

[0046] Figure 3 A rear view (excluding the mounting base) of the screen blocking device provided in an embodiment of this disclosure is shown;

[0047] Figure 4 A schematic diagram of the linkage mechanism in the screen blocking device provided in the embodiments of this disclosure is shown;

[0048] Figure 5 A cross-sectional view of the screen blocking device provided in an embodiment of this disclosure is shown;

[0049] Figure 6 A schematic diagram of a swing arm in a screen blocking device provided in an embodiment of this disclosure is shown.

[0050] The following are the labels in the diagram: 1. Screen; 11. Guide component; 2. Blocking component; 21. First sub-component; 22. Second sub-component; 23. Guide section; 3. Fixed base; 31. Positioning pin; 4. Linkage mechanism; 41. Rotating rod; 42. Hinge joint; 43. Swing rod; 431. First sub-rod; 432. Second sub-rod; 44. Sliding groove; 45. Positioning component. Detailed Implementation

[0051] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0052] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0053] Combination Figure 1 , Figure 2 and Figure 5 As shown, this embodiment of the present disclosure provides a screen blocking device for blocking a screen 1, which includes a blocking member 2 and a linkage mechanism 4; the blocking member 2 is disposed on the back side of the screen 1 and extends at least partially out of the side of the screen 1; the linkage mechanism 4 is connected to the blocking member 2 and the blocking member 2 in a transmission connection; wherein, the blocking member 2 can push and pull to adjust the length of itself extending out of the screen 1.

[0054] When the blocking member 2 is stretched out, the linkage mechanism 4 simultaneously drives the screen 1 to move away from the blocking member 2, and the blocking member 2 retracts and rotates towards the side of the screen 1; when the blocking member 2 is pushed back, the linkage mechanism 4 simultaneously drives the screen 1 to move closer to the blocking member 2, and the blocking member 2 spreads and rotates away from the side of the screen 1.

[0055] When using this screen blocking device, if the user needs to block the left and right sides of the screen 1 according to their work requirements, they only need to gradually pull the blocking member 2 out from the side of the screen 1. At this time, the linkage mechanism 4 will simultaneously drive the screen 1 away from the blocking member 2 and gradually move the blocking member 2 away from the side of the screen 1. Thus, the degree to which the side of the screen 1 is blocked can be adjusted according to the degree to which the blocking member 2 is pulled out from the side of the screen 1. When the user does not need to block the left and right sides of the screen 1, they only need to push the blocking member 2 back from the side of the screen 1. At this time, the linkage mechanism 4 will simultaneously drive the screen 1 towards the blocking member 2 and gradually move the blocking member 2 away from the side of the screen 1 until the blocking member 2 no longer blocks the side of the screen 1.

[0056] It is also worth noting that the aforementioned blocking member 2 can be specifically, but not limited to, an arc-shaped plate, and can be respectively set on the left and right sides of the screen 1, and jointly connected to the linkage mechanism 4 for transmission; moreover, the range of movement of the screen 1 toward or away from the blocking member 2 can be specifically set at about 15cm, so as to ensure that the blocking member 2 has sufficient clearance to retract and rotate toward the side of the screen 1, and will not cause the screen blocking device to occupy too much space; moreover, when the blocking member 2 gradually retracts and rotates toward the side of the screen 1, the angle between the two blocking members 2 when they rotate to the most retracted state can be specifically set at about 110°, so as to ensure the blocking effect of the blocking member 2 on the left and right sides of the screen 1, and will not cause the angle between the two blocking members 2 to be too small, affecting the normal display of the screen 1.

[0057] In summary, the screen blocking device provided in this embodiment can change the degree of blocking of the screen 1 by stretching or pushing the blocking member 2, allowing users to block the left and right sides of the screen 1 to different degrees according to their work needs. It has the advantages of simple structure, convenient operation, suitability for open office environments, and full protection of users' work privacy and confidentiality.

[0058] In one embodiment, the screen blocking device further includes a fixing seat 3; the fixing seat 3 is spaced apart on the side of the blocking member 2 facing away from the screen 1 and is connected to the linkage mechanism 4 for transmission; when the blocking member 2 is stretched or retracted, the linkage mechanism 4 correspondingly drives the fixing seat 3 to move away from or closer to the screen 1.

[0059] Specifically, in combination Figure 1 and Figure 5 In further detail, the aforementioned fixing base 3 can be specifically used to be fixedly connected to the workbench. The fixing base 3 is spaced apart on the side of the shield 2 facing away from the screen 1 and is connected to the linkage mechanism 4. In this way, when the shield 2 is stretched, the fixing base 3 can serve as a fixed reference force support, allowing the screen 1 to move away from the fixing base 3 under the drive of the linkage mechanism 4, providing clearance for the shield 2 to retract and rotate towards the side of the screen 1. When the shield 2 is retracted, the fixing base 3 can also serve as a fixed reference force support, allowing the screen 1 to move towards the fixing base 3 under the drive of the linkage mechanism 4, so that the screen 1, shield 2 and fixing base 3 can form a more compact spatial structure.

[0060] In one embodiment, the linkage mechanism 4 includes a rotating rod 41, a hinge member, and a sliding groove 44; one end of the rotating rod 41 is hinged to the back side of the screen 1; the hinge member includes a hinge joint 42 hinged to the shield member 2 and a swing rod 43 connected to the hinge joint 42; the sliding groove 44 is formed in the fixed base 3, and the swing rod 43 passes through the sliding groove 44 and is hinged to the other end of the rotating rod 41.

[0061] When the shielding member 2 is pushed and pulled, the hinge joint 42 rotates and drives the rotating rod 41 and the swing rod 43 to slide along the sliding groove 44 respectively; the rotating rod 41 rotates to change the angle between the shielding member 2 and the side of the screen 1, and to change the distance between the screen 1 and the fixed base 3.

[0062] Specifically, in combination Figure 3 and Figure 4In further detail, the linkage mechanism 4 is specifically configured as follows: a rotating rod 41 hinged to the back side of the screen 1, a hinge joint 42 hinged to the shield 2, a swing rod 43 connected to the hinge joint 42, and a sliding groove 44 opened in the fixed base 3. The swing rod 43 passes through the sliding groove 44 and is hinged to the other end of the rotating rod 41. When the shield 2 is pushed or pulled, the hinge joint 42 will rotate and drive the rotating rod 41 and the swing rod 43 to slide along the sliding groove 44. This can change the angle between the shield 2 and the side of the screen 1, and change the distance between the screen 1 and the fixed base 3.

[0063] The above-mentioned linkage mechanism 4 has the advantages of simple structure, stable transmission, and the ability to effectively change the angle between the blocking member 2 and the side of the screen 1 and the distance between the screen 1 and the fixed base 3 when the blocking member 2 is pushed and pulled.

[0064] Of course, the above-mentioned linkage mechanism 4 can also be configured in other ways, such as a "rotation mechanism + translation mechanism" structure, in which the "rotation mechanism" changes the tilt angle between the shield 2 and the back of the screen 1, and the "translation mechanism" changes the distance between the screen 1 and the fixed base 3.

[0065] In one embodiment, the linkage mechanism 4 further includes a positioning member 45 disposed on the back side of the screen 1; the positioning member 45 is used to position and guide the screen 1 away from or towards the fixed base 3, and can be at least partially inserted into the fixed base 3.

[0066] Specifically, in combination Figure 3 and Figure 5 In further detail, a positioning component 45 is also provided in the linkage mechanism 4, located on the back side of the screen 1, and is at least partially inserted into the fixed base 3. In this way, when the screen 1 moves away from or towards the fixed base 3, the positioning component 45 can position the path guiding the screen 1, ensuring that the movement trajectory of the screen 1 will not deviate. That is, it can ensure that the angle between the blocking component 2 and the side of the screen 1 remains consistent during multiple movements of the screen 1.

[0067] In one embodiment, the positioning member 45 is a positioning guide strip vertically disposed on the back side of the screen 1; the positioning guide strip has an oblong guide hole along its own extension direction, and the fixing seat 3 is provided with a positioning pin 31 inserted into the oblong guide hole; when the screen 1 moves away from or closer to the fixing seat 3, the positioning pin 31 slides relative to the oblong guide hole.

[0068] Specifically, in combination Figure 3 and Figure 6For further detailed description, the positioning member 45 is specifically configured as a positioning guide bar located on the back side of the screen 1, the positioning guide bar is provided with a waist-shaped guide hole along its own extension direction, and a positioning pin 31 inserted into the waist-shaped guide hole is correspondingly provided in the fixing base 3. In this way, the positioning pin 31 can only slide relatively along the waist-shaped guide hole, so that the positioning member 45 can realize the function of positioning and guiding the movement path of the screen 1.

[0069] The specific arrangement of the positioning member 45 has the beneficial effect of simple structure and stable and reliable positioning effect.

[0070] In an implementable embodiment, two articulated heads 42 are arranged at intervals along the axial direction of the articulated head 42; the swing lever 43 comprises first sub-levers 431 respectively vertically articulated with the two articulated heads 42 and a second sub-lever 432 connecting the two first sub-levers 431; the second sub-lever 432 is inserted through the sliding groove 44 and articulated with the other end of the rotating lever 41.

[0071] Specifically, in combination with Figure 6 For further detailed description, two articulated heads 42 are specifically arranged at intervals along the axial direction of the articulated heads 42, and the swing lever 43 is specifically provided with two first sub-levers 431 vertically articulated with the articulated heads 42 respectively and a second sub-lever 432 connecting the two first sub-levers 431. In this way, the articulated heads 42 and the swing lever 43 as a whole present a structure similar to a Chinese character "convex". The two articulated heads 42 are jointly articulated with one shielding member 2, which can further improve the stability of the articulated installation of the shielding member 2. One second sub-lever 432 is connected with the two articulated heads 42 respectively through two first sub-levers 431, so that when the second sub-lever 432 slides in the sliding groove 44, the articulated rotation angles of the two articulated heads 42 can be changed synchronously at the same time.

[0072] The specific arrangement of the above articulated heads 42 and the swing lever 43 has the beneficial effects of simple structure and can further improve the stability of the articulated installation of the shielding member 2.

[0073] In an implementable embodiment, the shielding member 2 comprises a first sub-member 21 and a second sub-member 22; the first sub-member 21 and the second sub-member 22 are symmetrically arranged about the vertical central axis of the screen, and are respectively in transmission connection with the fixing base 3 and the screen 1 through respective articulated members.

[0074] Specifically, in combination with Figure 5 For further detailed description, the shielding member 2 is specifically configured as the first sub-member 21 and the second sub-member 22, the first sub-member 21 and the second sub-member 22 are symmetrically arranged about the vertical central axis of the screen, and are respectively in transmission connection with the fixing base 3 and the screen 1 through respective articulated members. In this way, the first sub-member 21 and the second sub-member 22 can simultaneously and synchronously shield the left and right sides of the screen 1 respectively, further improving the full protection effect of the screen shielding device on the user's work privacy and confidential information.

[0075] In one embodiment, two rotating rods 41 are symmetrically arranged about the central axis of the screen 1; the two rotating rods 41 are connected to the center of the screen 1 and are respectively hinged to the swing rods 43 in the first sub-component 21 and the second sub-component 22.

[0076] Specifically, in combination Figure 3 and Figure 4 To explain in more detail, two rotating rods 41 are symmetrically arranged about the central axis of the screen 1, and are respectively hinged to the swing rods 43 in the first sub-component 21 and the second sub-component 22. In this way, even if the user only pushes or pulls the first sub-component 21, as long as the screen 1 moves towards or away from the fixed base 3, the two rotating rods 41 will rotate and change the angle with the swing rods 43, thereby driving the second sub-component 22 to move synchronously with the first sub-component 21.

[0077] The specific arrangement of the rotating rod 41 described above has the advantages of simple structure and ensuring synchronous movement of the first sub-component 21 and the second sub-component 22.

[0078] In one embodiment, a guide member 11 is also provided on the side of the screen 1; a guide portion 23 is provided in the shielding member 2 along its own extension direction; the guide member 11 is correspondingly inserted into the guide portion 23 and can slide back and forth along the guide portion 23 when the shielding member 2 is pushed and pulled.

[0079] Specifically, in combination Figure 5 and Figure 6 In further detail, a guide member 11 is provided on the side of the screen 1, and a guide portion 23 is provided in the shielding member 2 along its own extension direction. The guide member 11 is inserted into the guide portion 23 and can slide back and forth along the guide portion 23 when the shielding member 2 is pushed and pulled. In this way, when the user pushes and pulls the shielding member 2 to make it close or spread towards the side of the screen 1, the guide member 11 will slide in a limited manner along the extension direction of the guide portion 23, thereby further restricting the trajectory of the closing or spreading rotation of the shielding member 2, and further ensuring the shielding effect of the shielding member 2 on the side of the screen 1 and the movement stability of the shielding member 2.

[0080] In one embodiment, the guide member 11 is a guide head tilted away from the side of the screen 1; the guide portion 23 is a guide groove extending along the direction of the shield 2, and the guide head is at least partially engaged and inserted into the guide groove.

[0081] Specifically, in combination Figure 5 and Figure 6 In further detail, the guide member 11 is specifically configured as a guide head tilted away from the side of the screen 1, and the guide part 23 is specifically configured as a guide groove extending along the direction of the shield 2. The guide head can be inserted into the guide groove to achieve the guiding and limiting of the two, which has the beneficial effects of simple structure and stable guidance.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A screen blocking device for blocking a screen (1), characterized in that, include: A shielding member (2) is disposed on the back side of the screen (1) and extends at least partially out of the side of the screen (1); The linkage mechanism (4) is connected to the shielding member (2) and the screen (1) respectively; The shielding member (2) can be pushed and pulled to adjust the length of itself extending out of the screen (1); When the shielding member (2) is stretched out, the linkage mechanism (4) simultaneously drives the screen (1) to move away from the shielding member (2), and the shielding member (2) retracts and rotates toward the side of the screen (1); When the blocking member (2) is pushed back, the linkage mechanism (4) simultaneously drives the screen (1) to move closer to the blocking member (2), and the blocking member (2) rotates away from the side of the screen (1).

2. The screen blocking device according to claim 1, characterized in that, The screen blocking device also includes a fixing base (3); The fixing seat (3) is spaced apart on the side of the shielding member (2) facing away from the screen (1) and is connected to the linkage mechanism (4) in a transmission manner; When the shielding member (2) is stretched or retracted, the linkage mechanism (4) correspondingly drives the fixed seat (3) to move away from or closer to the screen (1).

3. The screen blocking device according to claim 2, characterized in that, The linkage mechanism (4) includes: A rotating rod (41) is hinged at one end to the back side of the screen (1); The hinge includes a hinge joint (42) hinged in the shield (2) and a swing rod (43) connected to the hinge joint (42); A sliding groove (44) is provided on the fixed base (3), and the swing rod (43) passes through the sliding groove (44) and is hinged to the other end of the rotating rod (41); When the blocking member (2) moves by pushing or pulling: The hinge joint (42) rotates and drives the swing rod (43) to slide along the sliding groove (44); The rotating rod (41) rotates to change the angle between the shielding member (2) and the side of the screen (1), and to change the distance between the screen (1) and the fixed base (3).

4. The screen blocking device according to claim 3, characterized in that, The linkage mechanism (4) also includes a positioning component (45) disposed on the back side of the screen (1); The positioning element (45) is used to position the screen (1) away from or near the fixing base (3) and is capable of being inserted into the fixing base (3) at least partially.

5. The screen blocking device according to claim 4, characterized in that, The positioning element (45) is a positioning guide strip that is vertically set on the back side of the screen (1); The positioning guide strip has a waist-shaped guide hole along its own extension direction, and the fixing seat (3) is provided with a positioning pin inserted into the waist-shaped guide hole. When the screen (1) moves away from or closer to the fixed base (3), the positioning pin slides relative to the waist-shaped guide hole.

6. The screen blocking device according to claim 3, characterized in that, Two hinge joints (42) are spaced apart along their own axial direction; The swing arm (43) includes a first sub-arm (431) that is perpendicularly hinged to the two hinge joints (42) respectively, and a second sub-arm (432) that connects the two first sub-arms (431); The second sub-rod (432) is inserted into the sliding groove (44) and hinged to the other end of the rotating rod (41).

7. The screen blocking device according to claim 6, characterized in that, The shielding component (2) includes a first sub-component (21) and a second sub-component (22); The first sub-component (21) and the second sub-component (22) are symmetrically arranged about the vertical central axis of the screen, and are respectively connected to the fixed base (3) and the screen (1) through their respective hinges.

8. The screen blocking device according to claim 7, characterized in that, Two rotating rods (41) are symmetrically arranged about the central axis of the screen (1); The two rotating rods (41) are connected together to the center of the screen (1) and are respectively hinged to the swing rods (43) in the first sub-component (21) and the second sub-component (22).

9. The screen blocking device according to any one of claims 1 to 8, characterized in that, The side of the screen (1) is also provided with a guide (11); The shielding member (2) has a guide portion (23) extending along its own extension direction; The guide member (11) is inserted into the guide portion (23) and can slide back and forth along the guide portion (23) when the blocking member (2) is pushed and pulled.

10. The screen blocking device according to claim 9, characterized in that, The guide (11) is a guide head that is tilted away from the side of the screen (1); The guide portion (23) is a guide groove extending along the direction of the shield (2), and the guide head is at least partially engaged and inserted into the guide groove.

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