A space optical camera lens protection cover opening and closing mechanism

Abstract

The application discloses a space optical camera lens protection light shielding cover opening and closing mechanism and belongs to the technical field of space optics. The protection light shielding cover opening and closing mechanism comprises a light shielding cover, a top portion of the light shielding cover is fixed with an opening and closing mechanism base, and a protection light shielding cover is rotationally connected to one side of the top portion of the opening and closing mechanism base. A pair of opening and closing mechanisms are arranged on the opening and closing mechanism base and are used for driving the opening and closing movement of the protection light shielding cover. The application provides a protection light shielding cover opening and closing mechanism, a triangular structure is formed by the opening state mechanism, the protection light shielding cover and the bottom structure of the protection light shielding cover, so that higher opening state rigidity and basic frequency of the protection light shielding cover are provided, and the attitude control of the whole machine is facilitated.

Description

Technical Field

[0001] This invention relates to the field of space optics technology, and in particular to an opening and closing mechanism for a protective light-shielding cover for a space optical camera lens. Background Technology

[0002] The protective light-shielding cover for the lens of a space optical camera blocks sunlight and reduces stray light from the Earth and atmosphere during on-orbit observation and imaging, thus improving the image quality of the optical camera. During non-observation and imaging, it provides thermal and physical protection for the light-shielding port. Large space optical cameras have relatively large protective light-shielding covers. For typical opening and closing mechanisms with the drive located on a rotating shaft, the open state of the protective light-shielding cover has poor stiffness and a low fundamental frequency, which is detrimental to the overall attitude control of the camera. Therefore, an opening and closing mechanism is needed that can achieve a higher fundamental frequency for the open state of the protective light-shielding cover. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art by providing a protective light-shielding cover opening and closing mechanism that can ensure high rigidity and fundamental frequency of the protective light-shielding cover in the open state.

[0004] To achieve the above objectives, the present invention provides an opening and closing mechanism for a protective light-shielding cover for a space optical camera lens, the specific technical solution of which is as follows:

[0005] A mechanism for opening and closing a protective light-shielding cover for a space optical camera lens, the mechanism comprising:

[0006] Sunshade;

[0007] The opening and closing mechanism base is fixed to the top of the light shield, and a round hole is opened in the middle of the opening and closing mechanism base to cooperate with the aperture of the light shield; a protective light shield cover is rotatably connected to one side of the top of the opening and closing mechanism base.

[0008] A pair of opening and closing mechanisms are installed and fixed on the base of the opening and closing mechanism and respectively arranged on both sides of the circular hole. The end of each opening and closing mechanism away from the base of the opening and closing mechanism is hinged to the side of the protective light-shielding cover; used to realize the opening and closing movement of the protective light-shielding cover.

[0009] Each opening and closing mechanism includes: a motor, the output end of which is connected to a reducer, and the other end of which is fixedly connected to a lead screw. The motor, reducer, and lead screw are respectively mounted on the base of the opening and closing mechanism via support seats. A nut is fitted on the lead screw for use with it. A slider is fixedly connected to the bottom of the nut. A guide rail of the same length as the lead screw is provided below it. The guide rail is fixed to the base of the opening and closing mechanism. A support rod is hinged to the top of the nut. The end of the support rod away from the nut is hinged to the side of the protective light-shielding cover.

[0010] Furthermore, the protective light-shielding cover is connected to the base of the opening and closing mechanism via multiple rotating shafts.

[0011] Beneficial effects of the present invention

[0012] The present invention provides a protective light-shielding cover opening and closing mechanism. The open state mechanism, the protective light-shielding cover and its bottom structure form a triangular structure, thus providing high rigidity and fundamental frequency of the protective light-shielding cover in the open state, which is beneficial to the overall attitude control of the machine. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the protective light-shielding cover opening and closing mechanism provided by the present invention;

[0014] Figure 2 This is a partial structural diagram provided for the present invention.

[0015] In the picture,

[0016] 1. Sunshade; 2. Opening / closing mechanism base; 3. Rotating shaft; 4. Protective sunshade cover; 5. Opening / closing mechanism;

[0017] 21. Round hole;

[0018] 51. Motor; 52. Reducer; 53. Lead screw; 54. Support base; 55. Nut; 56. Slider; 57. Guide rail; 58. Support rod. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] It should be noted that the terms "upper" and "side" used herein indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of describing the invention and simplifying the description. Similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0021] See Figures 1-2 ;

[0022] A mechanism for opening and closing a protective light-shielding cover for a space optical camera lens, the mechanism comprising:

[0023] Sunshade 1;

[0024] The opening and closing mechanism base 2 is fixed to the top of the light shield 1, and the opening and closing mechanism base 2 has a round hole 21 in the middle to cooperate with the aperture of the light shield 1; a protective light shield cover plate 4 is rotatably connected to one side of the top of the opening and closing mechanism base 2.

[0025] A pair of opening and closing mechanisms 5 are installed and fixed on the opening and closing mechanism base 2 and respectively arranged on both sides of the circular hole 21. The end of each opening and closing mechanism 5 away from the opening and closing mechanism base 2 is hinged to the side of the protective light-shielding cover 4; used to realize the opening and closing movement of the protective light-shielding cover 4.

[0026] Each opening and closing mechanism 5 includes: a motor 51, the output end of which is connected to a reducer 52, and the other end of which is fixedly connected to a lead screw 53. The bottoms of the motor 51, reducer 52 and lead screw 53 are respectively mounted on the opening and closing mechanism base 2 via support seats 54. A nut 55 is fitted on the lead screw 53 for use with it. A slider 56 is fixedly connected to the bottom of the nut 55. A guide rail 57 of the same length as the lead screw 53 is provided below it. The guide rail 57 is fixed on the opening and closing mechanism base 2. A support rod 58 is hinged to the top of the nut 55. The end of the support rod 58 away from the nut 55 is hinged to the side of the protective light-shielding cover 4.

[0027] Furthermore, the protective light-shielding cover 4 is connected to the opening and closing mechanism base 2 via multiple rotating shafts 3.

[0028] Usage: Drive motor 51 to rotate, which directly drives lead screw 53 to rotate, such as... Figure 2 As shown: the nut 55 can reciprocate along the lead screw 53, while the slider 56 slides in the guide rail 57. At the same time, the protective light-shielding cover 4 is driven to rotate around the rotating shaft 3 through the support rod 58, so as to realize the opening and closing movement of the protective light-shielding cover 4.

[0029] The opening and closing mechanism 5 is the driving mechanism for the opening and closing movement of the protective light-shielding cover 4. When the protective light-shielding cover 4 is in the open state, it together with the support rod 58, the protective light-shielding cover shaft 3 and the opening and closing mechanism base 2 in the opening and closing mechanism 5 form a triangular stable structure, which improves the structural rigidity of the protective light-shielding cover 4 and increases the fundamental frequency of the protective light-shielding cover 4 in the open state.

[0030] The light shield 1 can adopt a general lens front end structure, that is, it does not have a structure to eliminate stray light; the installation position and number of the rotating shaft 3 can be adjusted according to the size of the cover plate and the base 2 of the opening and closing mechanism; the opening and closing mechanism 5 can be arranged only on one side of the protective light shield cover plate 4; the opening and closing mechanisms 5 on both sides of the protective light shield cover plate 4 can have a motor reducer drive component on only one side.

Claims

1. A mechanism for opening and closing a protective light-shielding cover for a space optical camera lens, characterized in that, The opening and closing mechanism of the protective light-shielding cover includes: Sunshade (1); The opening and closing mechanism base (2) is fixed to the top of the light shield (1), and the opening and closing mechanism base (2) has a round hole (21) in the middle that matches the aperture of the light shield (1); a protective light shield cover plate (4) is rotatably connected to one side of the top of the opening and closing mechanism base (2). A pair of opening and closing mechanisms (5) are installed and fixed on the opening and closing mechanism base (2) and respectively arranged on both sides of the round hole (21). The end of each opening and closing mechanism (5) away from the opening and closing mechanism base (2) is hinged to the side of the protective light-shielding cover (4); used to realize the opening and closing movement of the protective light-shielding cover (4); Each opening and closing mechanism (5) includes: a motor (51), the output end of which is connected to a reducer (52), and the other end of which is fixedly connected to a lead screw (53). The bottoms of the motor (51), reducer (52) and lead screw (53) are respectively mounted on the base (2) of the opening and closing mechanism via support seats (54). A nut (55) is fitted on the lead screw (53) for use with it. A slider (56) is fixedly connected to the bottom of the nut (55). A guide rail (57) of the same length as the lead screw (53) is provided below it. The guide rail (57) is fixed on the base (2) of the opening and closing mechanism. A support rod (58) is hinged to the top of the nut (55). The end of the support rod (58) away from the nut (55) is hinged to the side of the protective light shield (4).

2. The opening and closing mechanism for a protective light-shielding cover for a space optical camera lens according to claim 1, characterized in that, The protective light-shielding cover (4) is connected to the opening and closing mechanism base (2) via multiple rotating shafts (3).

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