Privacy cover system for a projection lens

Abstract

This utility model discloses a privacy cover system for a projection lens, including an assembly base plate and a cover plate frame. The assembly base plate has a light-transmitting opening. An upper connecting seat assembly and a lower connecting seat assembly are located at the front end of the assembly base plate. A lead screw is rotatably mounted on the upper connecting seat assembly, and an upper balance bar is also mounted on the upper connecting seat assembly. A lower balance bar is mounted on the lower connecting seat assembly. An upper composite slider is located at the upper end of the cover plate frame, and a lower balance slider is located at the lower end of the cover plate frame. It also includes a lead screw drive assembly for driving the lead screw to rotate. This utility model, through a combination of optimized mechanical transmission and enhanced structural stability, achieves rapid response, stable operation, and reliable protection for the physical blocking device of the projector lens. It can achieve millisecond-level response in emergency situations, effectively dealing with misprojection or abnormal projection.

Description

Technical Field

[0001] This utility model relates to the field of projector cutting technology, and in particular to a privacy cover system for projection lenses. Background Technology

[0002] A projector is a display device that magnifies and projects images onto a screen or wall using an optical lens, and is widely used in scenarios such as meetings, education, and home entertainment. However, in actual use, operational errors, system malfunctions, or malicious attacks (such as hacking) may cause abnormal projected content or leakage of sensitive information. In such cases, it is necessary to immediately cut off the projection to prevent further dissemination of information or adverse effects.

[0003] Currently, the common emergency cut-off projection methods mainly include the following two:

[0004] 1. Directly cutting off the power: While this method can quickly stop projection, frequent hard shutdowns can damage the projector's electronic components (such as the lamp and power module), affecting the device's lifespan. Furthermore, restarting the projector usually requires a long warm-up time, causing interruptions and impacting efficiency.

[0005] 2. Shutting down the projector via the operating system: Compared to directly cutting off the power, this method has less impact on the hardware. However, in cases of system lag, unresponsive programs, or network attacks, the shutdown command may not be executed in time. Furthermore, the operating system's shutdown process typically takes several seconds or even longer, potentially missing the optimal shutdown window and failing to meet the need for rapid response in emergencies. Utility Model Content

[0006] The purpose of this invention is to overcome the aforementioned problems of the prior art and provide a privacy cover system for projection lenses, which has the advantages of stable and reliable operation and low production cost.

[0007] The objective of this utility model is mainly achieved through the following technical solutions:

[0008] The projection lens privacy cover system includes an assembly base plate and a cover plate frame, with a light-transmitting opening on the assembly base plate;

[0009] The front end of the assembly base plate is provided with an upper connecting seat assembly located above the light-transmitting opening and a lower connecting seat assembly located below the light-transmitting opening;

[0010] A lead screw is rotatably mounted on the upper connecting seat assembly, and an upper balance bar located in front of the lead screw is also mounted on the upper connecting seat assembly;

[0011] A lower balance bar is installed on the lower connecting seat assembly;

[0012] The upper end of the cover plate frame is equipped with an upper composite slider, which can cooperate with the lead screw and the upper balance bar. The lower end of the cover plate frame is equipped with a lower balance slider that can cooperate with the lower balance bar.

[0013] It also includes a lead screw drive assembly for driving the lead screw to rotate. The lead screw drive assembly, through the cooperation between the lead screw and the upper composite slider, enables the cover plate frame to slide left and right in the light-transmitting opening area.

[0014] Furthermore, a mounting bracket is connected to the right end of the assembly base plate;

[0015] The lead screw drive assembly includes a motor mounted on a mounting bracket;

[0016] The lead screw drive assembly also includes a first transmission gear, a second transmission gear, and a third transmission gear that mesh in sequence, with the outer diameters of the first transmission gear, the second transmission gear, and the third transmission gear decreasing sequentially.

[0017] The first transmission gear is sleeved on the output shaft of the motor, the third transmission gear is sleeved on the end of the lead screw, and the second transmission gear is rotatably mounted on the mounting bracket.

[0018] Furthermore, the upper connecting seat assembly includes two upper connecting seats spaced apart from each other on the left and right;

[0019] The two ends of the lead screw are rotatably connected to the two upper connecting seats, and the two ends of the upper balance bar are connected to the two upper connecting seats.

[0020] Furthermore, the lower connector assembly includes two lower connectors spaced apart from each other on the left and right;

[0021] The two ends of the lower balance bar are respectively connected to the two lower connecting seats.

[0022] Furthermore, both the left and right ends of the upper balance bar are provided with upper limit sleeves that can act on the upper composite slider;

[0023] Both ends of the lower balance bar are provided with lower limit sleeves that can act on the lower balance slider.

[0024] Furthermore, the cover plate frame has a blocking section, and both the upper and lower ends of the blocking section are provided with rearward clearance sections, which are detachably connected to the upper composite slider and the lower balance slider, respectively.

[0025] Furthermore, the upper composite slider is provided with at least two upper connecting blind holes, and the upper end of the clearance section extends upward to connect with an upper connecting piece. The upper connecting piece is provided with at least two upper connecting through holes corresponding to at least two upper connecting blind holes respectively, and also includes an upper locking screw, which passes through the upper connecting through hole and is threadedly connected to the upper connecting blind hole.

[0026] The lower balance slider has at least two lower connecting blind holes. The clearance section at the lower end extends downward and is connected to a lower connecting piece. The lower connecting piece has at least two lower connecting through holes corresponding to the at least two lower connecting blind holes. It also includes a lower locking screw, which passes through the lower connecting through hole and is threadedly connected to the lower connecting blind hole.

[0027] Furthermore, the upper composite slider is provided with an upper positioning protrusion at its front end, and the upper connecting piece is provided with an upper positioning through hole that cooperates with the upper positioning protrusion.

[0028] The lower balance slider is also provided with a lower positioning protrusion at its front end, and the lower connecting piece is provided with a lower positioning through hole that cooperates with the lower positioning protrusion.

[0029] Furthermore, composite limiting protrusions are provided at both ends of the front end of the upper composite slider.

[0030] The upper end of the upper connecting piece has an upper insertion section that can be inserted into the area between the two composite limiting protrusions.

[0031] Furthermore, the cover plate frame is provided with a weight reduction notch;

[0032] The cover plate frame is also provided with an infrared clearance notch.

[0033] This utility model has the following beneficial effects: By combining optimized mechanical transmission with enhanced structural stability, this utility model achieves rapid response, stable operation, and reliable protection for the physical blocking device of the projector lens. Specifically:

[0034] 1. Rapid response mechanism: The torque and speed are converted through the lead screw drive component. The rotational force can be converted into axial thrust through the cooperation of the lead screw and the upper composite slider to drive the cover plate frame to move along the lead screw axis, realize the left and right sliding of the cover plate frame, and thus realize the physical opening and closing action of the lens obstruction. It can achieve millisecond-level response in emergency situations and effectively deal with misprojection or abnormal projection.

[0035] 2. Stable Operation System: The cooperation between the upper balance bar and the upper composite slider, as well as the cooperation between the lower balance bar and the lower balance slider, effectively improves the stability of the cover plate frame's lateral sliding, thereby enhancing operational reliability. The cooperation between the upper positioning protrusion and the upper positioning through hole enables rapid positioning between the upper connecting piece and the upper composite slider, improving the stability of their connection. Similarly, the cooperation between the lower positioning protrusion and the lower positioning through hole enables rapid positioning between the lower connecting piece and the lower balance slider, further enhancing their connection stability. The cooperation between the upper insertion section and the two composite limiting protrusions effectively counteracts the vibration effects during the lead screw drive process, further ensuring the stability of the connection between the upper connecting piece and the upper composite slider. The weight reduction notch design optimizes the center of gravity distribution of the cover plate frame, further enhancing motion smoothness.

[0036] 3. Safety protection function: Both the upper and lower limit sleeves can limit the extreme positions of the cover plate frame to the left and right directions, so as to prevent excessive movement; the clearance section structure at both ends of the shielding section can be adapted to projector lenses of different sizes, ensuring complete shielding while avoiding lens damage. Attached Figure Description

[0037] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in describing the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments recorded in this utility model. Those skilled in the art can derive other drawings from the following drawings without any creative effort.

[0038] Figures 1-2 This is a schematic diagram of a specific embodiment of the privacy cover system for projection lenses described in this utility model;

[0039] Figure 3 This is a schematic diagram of a specific embodiment of the assembly base plate in the privacy cover system for projection lenses described in this utility model;

[0040] Figure 4 This is a schematic diagram of a specific embodiment of the cover plate frame in the privacy cover system for projection lenses described in this utility model;

[0041] Figure 5 This is a schematic diagram of a specific embodiment of the lead screw drive assembly in the privacy cover system for projection lenses described in this utility model.

[0042] The component names corresponding to the reference numerals in the attached drawings are as follows: 1. Assembly base plate; 2. Light-transmitting opening; 3. Lead screw; 4. Upper balance bar; 5. Lower balance bar; 6. Cover plate frame; 7. Upper composite slider; 8. Lower balance slider; 9. Motor; 10. First transmission gear; 11. Second transmission gear; 12. Third transmission gear; 13. Upper connecting seat; 14. Lower connecting seat; 15. Upper limit sleeve; 16. Lower limit sleeve; 17. Blocking section; 18. Let... 19. Composite limiting protrusion; 20. Upper positioning protrusion; 21. Upper connecting blind hole; 22. Upper connecting piece; 23. Upper insertion section; 24. Upper positioning through hole; 25. Upper connecting through hole; 26. Upper locking screw; 27. Lower connecting blind hole; 28. Lower connecting piece; 29. ​​Lower locking screw; 30. Lower positioning protrusion; 31. Lower positioning through hole; 32. Weight reduction notch; 33. Infrared clearance notch; 34. Mounting bracket; 35. Lower connecting through hole. Detailed Implementation

[0043] To enable those skilled in the art to better understand this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments described in this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] Example 1

[0045] like Figures 1 to 5 As shown, the privacy cover system for the projection lens includes an assembly base plate 1 and a cover plate frame 6, and the assembly base plate 1 has a light-transmitting opening 2.

[0046] The front end of the assembly base plate 1 is provided with an upper connecting seat assembly located above the light-transmitting opening 2 and a lower connecting seat assembly located below the light-transmitting opening 2;

[0047] A lead screw 3 is rotatably mounted on the upper connecting seat assembly, and an upper balance bar 4 located in front of the lead screw 3 is also mounted on the upper connecting seat assembly;

[0048] The lower balance bar 5 is installed on the lower connecting seat assembly;

[0049] The upper end of the cover plate frame 6 is provided with an upper composite slider 7, which can cooperate with the lead screw 3 and the upper balance bar 4. The lower end of the cover plate frame 6 is provided with a lower balance slider 8 that can cooperate with the lower balance bar 5.

[0050] It also includes a lead screw drive assembly for driving the lead screw 3 to rotate. The lead screw drive assembly, through the cooperation between the lead screw 3 and the upper composite slider 7, enables the cover plate frame 6 to slide left and right in the area of ​​the light-transmitting opening 2.

[0051] In this embodiment, the base plate 1 is mounted on the projector lens mount, and the projector lens is located in the area where the light-transmitting opening 2 is located. When it is necessary to physically block the lens, the lead screw drive assembly is activated, causing it to drive the lead screw 3 to rotate. Through the cooperation of the lead screw 3 and the upper composite slider 7, the cover plate frame 6 is moved to slide until the lens is blocked. This allows for a quick response to accidental or incorrect projection situations without adversely affecting the projector's lifespan or operating system, providing excellent timeliness and safety.

[0052] The cooperation between the upper balance bar and the upper composite slider 7, as well as the cooperation between the lower balance bar 5 and the lower balance slider 8, can effectively improve the stability of the cover plate frame 6 in the left and right directions, thereby improving the reliability of the operation of this embodiment.

[0053] Preferably, a mounting bracket 34 is connected to the right end of the assembly base plate 1;

[0054] The lead screw drive assembly includes a motor 9 mounted on a mounting bracket 34;

[0055] The lead screw drive assembly also includes a first transmission gear 10, a second transmission gear 11, and a third transmission gear 12 that mesh in sequence, and the outer diameters of the first transmission gear 10, the second transmission gear 11, and the third transmission gear 12 decrease in sequence.

[0056] The first transmission gear 10 is sleeved on the output shaft of the motor 9, the third transmission gear 12 is sleeved on the end of the lead screw 3, and the second transmission gear 11 is rotatably mounted on the mounting bracket 34.

[0057] In this embodiment, the motor 9 outputs power and can be a stepper motor 15BY25-1121K; the meshing of the first transmission gear 10, the second transmission gear 11 and the third transmission gear 12 achieves an appropriate deceleration effect to realize the conversion of torque and speed; the rotation of the lead screw and its cooperation with the upper composite slider 7 can convert the rotational force into axial thrust to drive the cover plate frame 6 to move axially along the lead screw 3, realize the left and right sliding of the cover plate frame 6, and thus realize the physical opening and closing action of the lens cover.

[0058] To realize the setting of lead screw 3 and upper balance bar 4, preferably, the upper connecting seat assembly includes two upper connecting seats 13 arranged at left and right intervals;

[0059] The two ends of the lead screw 3 are rotatably connected to the two upper connecting seats 13, and the two ends of the upper balance rod 4 are connected to the two upper connecting seats 13.

[0060] To achieve the setting of the lower balance bar 5, preferably, the lower connecting seat assembly includes two lower connecting seats 14 arranged at left and right intervals;

[0061] The two ends of the lower balance bar 5 are respectively connected to the two lower connecting seats 14.

[0062] Preferably, both the left and right ends of the upper balance bar 4 are provided with upper limit sleeves 15 that can act on the upper composite slider 7;

[0063] Both ends of the lower balance bar 5 are provided with lower limit sleeves 16 that can act on the lower balance slider 8.

[0064] In this embodiment, both the upper limit sleeve 15 and the lower limit sleeve 16 can limit the extreme positions of the cover plate frame 6 in the left and right directions, so as to prevent excessive movement.

[0065] Preferably, the cover plate frame 6 has a blocking section 17, and both the upper and lower ends of the blocking section 17 are provided with rearward relief sections 18. The two relief sections 18 are detachably connected to the upper composite slider 7 and the lower balance slider 8, respectively.

[0066] When the projector lens is large and protrudes outward, the clearance section 18 provides sufficient clearance, thus ensuring that the lens is not damaged and that the movement of the cover plate bracket 6 is reliable.

[0067] To achieve a detachable connection between the cover plate frame 6 and the upper composite slider 7 and the lower balance slider 8, preferably, the upper composite slider 7 is provided with at least two upper connecting blind holes 21, the upper end of the clearance section 18 extends upward and is connected to an upper connecting piece 22, the upper connecting piece 22 is provided with at least two upper connecting through holes 25 respectively corresponding to at least two upper connecting blind holes 21, and also includes an upper locking screw 26, the upper locking screw 26 passes through the upper connecting through hole 25 and is threadedly connected to the upper connecting blind hole 21;

[0068] The lower balance slider 8 has at least two lower connecting blind holes 27. The lower end of the clearance section 18 extends downward and is connected to a lower connecting piece 28. The lower connecting piece 28 has at least two lower connecting through holes 35 that correspond to at least two lower connecting blind holes 27 respectively. It also includes a lower locking screw 29, which passes through the lower connecting through hole 35 and is threadedly connected to the lower connecting blind hole 27.

[0069] Preferably, the upper composite slider 7 is further provided with an upper positioning protrusion 20 at its front end, and the upper connecting piece 22 is provided with an upper positioning through hole 24 that cooperates with the upper positioning protrusion 20;

[0070] The lower balance slider 8 is also provided with a lower positioning protrusion 30 at its front end, and the lower connecting piece 28 is provided with a lower positioning through hole 31 that cooperates with the lower positioning protrusion 30.

[0071] In this embodiment, the upper positioning protrusion 20 and the upper positioning through hole 24 can be used to quickly position the upper connecting piece 22 and the upper composite slider 7 for subsequent connection operations, and can also prevent the upper connecting piece 22 from moving unexpectedly during subsequent operation; the lower positioning protrusion 30 and the lower positioning through hole 31 can be used to quickly position the lower connecting piece 28 and the lower balance slider 8 for subsequent connection operations, and can also prevent the lower connecting piece 28 from moving unexpectedly during subsequent operation.

[0072] Preferably, the two ends of the front end of the upper composite slider 7 are provided with composite limiting protrusions 19 extending forward;

[0073] The upper end of the upper connecting piece 22 has an upper insertion section 23 that can be inserted into the area between the two composite limiting protrusions 19.

[0074] In this embodiment, the stability of the connection between the upper connecting piece 22 and the upper composite slider 7 can be further improved by the cooperation between the upper insertion section 23 and the two composite limiting protrusions 19. Even if there is shaking and wobbling when the lead screw and the upper composite slider 7 are connected, it will not affect the stability of the upper connecting piece 22.

[0075] Preferably, the cover plate frame 6 is provided with a weight reduction notch 32;

[0076] The cover plate frame 6 is also provided with an infrared clearance notch 33.

[0077] In this embodiment, the weight reduction notch 32 is used to adjust the center of gravity of the cover plate frame 6 so that the cover plate frame 6 has greater stability when moving left and right.

[0078] The infrared clearance notch 33 can be used with an infrared sensor. When the infrared clearance notch 33 is directly opposite the infrared sensor, it indicates that the cover plate 6 is in a lens-blocking state; when other positions of the cover plate 6 are directly opposite the infrared sensor, it indicates that the cover plate 6 is in an open state. Figure 4 As shown, the infrared clearance notch 33 can be set on the clearance section 18 at the lower end of the blocking section 17.

[0079] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A privacy cover system for a projection lens, characterized in that: It includes an assembly base plate (1) and a cover plate frame (6), and the assembly base plate (1) has a light-transmitting opening (2). The front end of the assembly base plate (1) is provided with an upper connecting seat assembly located above the light-transmitting opening (2) and a lower connecting seat assembly located below the light-transmitting opening (2); A lead screw (3) is rotatably mounted on the upper connecting seat assembly, and an upper balance bar (4) located in front of the lead screw (3) is also mounted on the upper connecting seat assembly. The lower connecting seat assembly is equipped with a lower balance bar (5); The upper end of the cover plate frame (6) is provided with an upper composite slider (7), which can cooperate with the lead screw (3) and the upper balance bar (4). The lower end of the cover plate frame (6) is provided with a lower balance slider (8) that can cooperate with the lower balance bar (5). It also includes a screw drive assembly for driving the screw (3) to rotate. The screw drive assembly, through the cooperation of the screw (3) and the upper composite slider (7), enables the cover plate frame (6) to slide left and right in the area of ​​the light-transmitting opening (2).

2. The privacy cover system for a projection lens according to claim 1, characterized in that: The right end of the assembly base plate (1) is connected to a mounting bracket (34). The lead screw drive assembly includes a motor (9) mounted on a mounting bracket (34); The lead screw drive assembly also includes a first transmission gear (10), a second transmission gear (11), and a third transmission gear (12) that mesh in sequence, and the outer diameters of the first transmission gear (10), the second transmission gear (11), and the third transmission gear (12) decrease in sequence. The first transmission gear (10) is sleeved on the output shaft of the motor (9), the third transmission gear (12) is sleeved on the end of the lead screw (3), and the second transmission gear (11) is rotatably mounted on the mounting bracket (34).

3. The privacy cover system for a projection lens according to claim 1, characterized in that: The upper connector assembly includes two upper connectors (13) spaced apart from each other on the left and right. The two ends of the lead screw (3) are rotatably connected to the two upper connecting seats (13), and the two ends of the upper balance bar (4) are connected to the two upper connecting seats (13).

4. The privacy cover system for a projection lens according to claim 3, characterized in that: The lower connector assembly includes two lower connectors (14) spaced apart from each other. The two ends of the lower balance bar (5) are respectively connected to the two lower connecting seats (14).

5. The privacy cover system for a projection lens according to claim 1, characterized in that: Both ends of the upper balance bar (4) are provided with upper limit sleeves (15) that can act on the upper composite slider (7). The lower balance bar (5) is provided with a lower limit sleeve (16) at both the left and right ends, which can act on the lower balance slider (8).

6. The privacy cover system for a projection lens according to claim 1, characterized in that: The cover plate frame (6) has a blocking section (17), and both the upper and lower ends of the blocking section (17) are provided with rearward relief sections (18). The two relief sections (18) are detachably connected to the upper composite slider (7) and the lower balance slider (8), respectively.

7. The privacy cover system for a projection lens according to claim 6, characterized in that: The upper composite slider (7) is provided with at least two upper connecting blind holes (21), and the upper end of the clearance section (18) extends upward and is connected to an upper connecting piece (22). The upper connecting piece (22) is provided with at least two upper connecting through holes (25) respectively corresponding to at least two upper connecting blind holes (21), and also includes an upper locking screw (26). The upper locking screw (26) passes through the upper connecting through hole (25) and is threadedly connected to the upper connecting blind hole (21). The lower balance slider (8) has at least two lower connecting blind holes (27). The lower end of the clearance section (18) extends downward and is connected to a lower connecting piece (28). The lower connecting piece (28) has at least two lower connecting through holes (35) that correspond to at least two lower connecting blind holes (27). It also includes a lower locking screw (29). The lower locking screw (29) passes through the lower connecting through hole (35) and is threaded to the lower connecting blind hole (27).

8. The privacy cover system for a projection lens according to claim 7, characterized in that: The upper composite slider (7) is also provided with an upper positioning protrusion (20) at its front end, and the upper connecting piece (22) is provided with an upper positioning through hole (24) that cooperates with the upper positioning protrusion (20). The lower balance slider (8) is also provided with a lower positioning protrusion (30) at its front end, and the lower connecting piece (28) is provided with a lower positioning through hole (31) that cooperates with the lower positioning protrusion (30).

9. The privacy cover system for a projection lens according to claim 7, characterized in that: The two ends of the upper composite slider (7) are provided with composite limiting protrusions (19) extending forward. The upper end of the upper connecting piece (22) has an upper insertion section (23) that can be inserted into the area between the two composite limiting protrusions (19).

10. The privacy cover system for a projection lens according to any one of claims 1-9, characterized in that: The cover plate frame (6) is provided with a weight reduction notch (32); The cover plate frame (6) is also provided with an infrared clearance notch (33).

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