Pop-up light shield based on memory metal spring

Abstract

The utility model discloses a pop-up light shield based on a memory metal spring, which relates to the technical field of light shields of optical systems, and comprises a fixed shield and a pop-up shield, the end part of one side of the fixed shield is provided with a plurality of mounting plates, and the plurality of mounting plates are uniformly arranged along the outer circumference of the fixed shield; a plurality of first limiting flanges are arranged at the end part of the other side of the fixed cover; a plurality of limiting guide rails are arranged on the inner wall of the pop-up cover, and each limiting guide rail is in sliding connection with the corresponding first limiting flange; the side face, close to the pop-up cover, of the mounting plate is connected with the end, away from the fixed cover, of the pop-up cover through a memory metal spring, the memory metal spring is arranged in a heating pipe in a sleeved mode, one end of the heating pipe is connected with the mounting plate, and the other end of the heating pipe is bonded to the pop-up cover. The self-unfolding mechanism adopts a self-unfolding mode of the memory metal spring, is simple in structure and convenient to deploy, and has better movement stability and higher unfolding precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical system light shield technical field especially, it relates to a kind of based on memory metal spring's pop-up type light shield. BACKGROUND

[0002] For the imaging system of space remote sensor, the invasion of sunlight can cause stray light and heat flow problems, affect the imaging quality of optical system. Stray light enters the optical system, via primary and secondary mirrors finally reaches the camera focal plane position, which will cause the optical system target signal-to-noise ratio to decline, and finally the imaging quality is poor;Heat flow can destroy the thermal balance in the camera, causing thermal deformation of structural parts and optical components, affecting the accuracy of optical system, and thus leading to poor imaging quality.

[0003] To eliminate the interference of sunlight on optical imaging system, the effective method commonly used is to install a light shield at the light aperture. Light shield is an important part of optical system, and is a conventional measure for suppressing stray light. It is used to block the light beams outside the field of view from entering the optical system, reduce the harm of stray light to system imaging, and thus improve the quality of system imaging.

[0004] The existing deployable light shield has many forms such as mechanical deployment, inflation deployment and self-deployment, but most of the deployable light shields have complex structure, need additional drive, are heavy and have large radial size, and the use conditions are relatively limited.

[0005] Therefore, the skilled person in the art provides a pop-up type light shield based on memory metal spring to solve the problems raised in the above background. UTILITY MODEL CONTENTS

[0006] The utility model provides a solution to the above problems. The spring made of memory alloy is used as a power source. The spring is heated by an electric heating wire to restore its elongated state, and the light shield is ejected. This pop-up type light shield can effectively reduce the volume of the camera when it is not working, which is beneficial to the internal layout of the spacecraft and reduces the space required during launch. A pop-up type light shield based on memory metal spring.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] The utility model provides a pop-up type light shield based on memory metal spring, which comprises:

[0009] The fixed cover has a plurality of mounting plates on one side end, and a plurality of first limiting flanges on the other side end.

[0010] A pop-up cover is sleeved on the fixed cover, and an inner wall of the pop-up cover is provided with a plurality of limiting guide rails, each of which is in sliding connection with a corresponding first limiting flange;

[0011] The side of the mounting plate close to the pop-up cover is connected with the end of the pop-up cover away from the fixed cover through a memory metal spring, the memory metal spring is sleeved in a heating pipe, one end of the heating pipe is connected with the mounting plate, and the other end of the heating pipe is bonded to the pop-up cover.

[0012] The number of the heating pipes and the memory metal springs is two, and the two are symmetrically arranged on the two sides of the fixed cover, the two memory metal springs are respectively connected with the corresponding mounting plates, and the remaining mounting plates are used for the mounting structure of the fixed cover.

[0013] Further, a base is mounted on the side of the mounting plate away from the memory metal spring, two power supply interfaces are arranged on the outer side of the base, and one end of the heating pipe passes through the mounting plate and is connected with the base.

[0014] Further, an electric heating wire is arranged in the heating pipe, the electric heating wire is electrically connected with one of the power supply interfaces, and the other end of the electric heating wire extends to the end of the heating pipe.

[0015] Further, the other power supply interface is electrically connected with the heating pipe.

[0016] Further, the inner wall of the pop-up cover is provided with a plurality of annular support plates, a plurality of the limiting guide rails are uniformly fixed on the inner wall of the plurality of annular support plates, and each limiting guide rail is connected with the inner wall of the plurality of annular support plates.

[0017] Further, an annular baffle is arranged at the end of the pop-up cover away from the mounting plate, a plurality of second limiting flanges are arranged at the end of the pop-up cover close to the mounting plate, each of the second limiting flanges is connected with the end of the corresponding limiting guide rail, and the end of the second limiting flange away from the pop-up cover is located on the inner side of the corresponding limiting guide rail.

[0018] Further, a first through hole is arranged on each of the two second limiting flanges, the two first through holes are symmetrically arranged in the interior of the pop-up cover, a second through hole is arranged at a position corresponding to the first through hole on each of the plurality of annular support plates, and when the pop-up cover is sleeved on the fixed cover, the heating pipe is located in the corresponding first through hole and second through hole.

[0019] Further, the part of the fixed cover between the adjacent two mounting plates is recessed inward to form a groove, and the groove is arranged at the end of the fixed cover close to the mounting plate.

[0020] In the above technical scheme, the pop-up type light shield cover based on the memory metal spring has the following beneficial effects:

[0021] 1. This application adopts a self-deploying method using memory metal springs, which has a simple structure, is easy to deploy, and has good motion stability and high deployment accuracy;

[0022] 2. This application significantly reduces the initial volume of the light shield. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 A schematic diagram of the structure of a pop-up sunshade based on a memory metal spring when it is deployed, provided for an embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the structure of a pop-up sunshade based on a memory metal spring in another direction when it is unfolded, as provided in an embodiment of this utility model;

[0026] Figure 3 for Figure 1 A sectional view;

[0027] Figure 4 for Figure 1 A schematic diagram of the ejection shield structure;

[0028] Figure 5 for Figure 1 Schematic diagram of the structure of the central fixed cover;

[0029] Figure 6 for Figure 1 Schematic diagram of the connection mechanism between the middle base and the heating element;

[0030] Figure 7 for Figure 6 A sectional view;

[0031] Figure 8 A cross-sectional view of a pop-up sunshade based on a memory metal spring when it is not unfolded, as provided in an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Fixing cover; 11. Mounting plate; 12. First limit flange; 13. Base; 14. Power interface; 15. Groove;

[0034] 20, pop cover; 21, limiting guide rail; 22, annular support plate; 23, annular baffle; 24, second limiting flange; 25, first through hole;

[0035] 30, memory metal spring; 31, heating pipe; 32, heating wire. DETAILED DESCRIPTION

[0036] In order to make the technical personnel in the field better understand the technical scheme of the utility model, the utility model will be described in further detail below with reference to the drawings.

[0037] Referring to Figures 1-5 As shown in the figure;

[0038] The utility model discloses a pop -out type light shield based on memory metal spring, including:

[0039] The fixed cover 10 one side end has a plurality of mounting plates 11, and a plurality of mounting plates 11 are evenly arranged along the outer circumference of the fixed cover 10, and the other side end of the fixed cover 10 has a plurality of first limiting flanges 12;

[0040] The pop cover 20 is set on the fixed cover 10, and the inner wall of the pop cover 20 has a plurality of limiting guide rails 21, and each limiting guide rail 21 is slidably connected with the corresponding first limiting flange 12;

[0041] The side surface of the mounting plate 11 close to the pop cover 20 and the end of the pop cover 20 away from the fixed cover 10 are connected by the memory metal spring 30, the memory metal spring 30 is set in the heating pipe 31, one end of the heating pipe 31 is connected with the mounting plate 11, and the other end of the heating pipe 31 is bonded with the pop cover 20.

[0042] The number of the heating pipe 31 and the memory metal spring 30 is two, and is respectively arranged on the two sides of the fixed cover 20, and the two memory metal springs 30 are respectively connected with the corresponding mounting plate 11, and the remaining mounting plate 11 is used for the mounting structure of the fixed cover 10, and the heating pipe 31 can be selected copper pipe.

[0043] When working, the heating pipe 31 is heated, so that the part of the heating pipe 31 and the pop cover 20 is separated, and then the pop cover 31 is popped out under the action of the memory metal spring 30, and the first limiting flange 12 can slide along the corresponding limiting guide rail 21 in the pop -out process; The above whole structure is simple, can effectively reduce the volume of camera when not working, is favorable for the internal layout of spacecraft and reduces the space required when launching.

[0044] Referring to Figures 1-7 As shown in the figure;

[0045] Further, a base 13 is mounted on the side of the mounting plate 11 away from the memory metal spring 30, and two power interfaces 14 are arranged on the outer side of the base 13. One end of the heating pipe 31 penetrates through the mounting plate 11 and is connected with the base 13.

[0046] Further, an electric heating wire 32 is arranged in the heating pipe 31, and the electric heating wire 32 is electrically connected with one of the power interfaces 14. The other end of the electric heating wire 32 extends to the end of the heating pipe 31.

[0047] Further, the other power interface 14 is electrically connected with the heating pipe 31.

[0048] When the ejecting cover 20 needs to be ejected, the electric heating wire 32 connected with the power interface 14 is heated by power supply, so that the heating pipe 31 is separated from the bonding part of the ejecting cover 20, and the ejecting cover 20 is smoothly ejected. During the ejection, the heating pipe 31 can be used as a guide rod of the ejecting cover 20, so that the ejection of the ejecting cover 20 is not affected by the deflection of the ejecting cover 20.

[0049] Further, a plurality of annular support plates 22 are arranged on the inner wall of the ejecting cover 20, and a plurality of limiting guide rails 21 are uniformly fixed on the inner wall of the plurality of annular support plates 22, and each limiting guide rail 21 is connected with the inner wall of the plurality of annular support plates 22.

[0050] The plurality of limiting guide rails 21 are fixed by the plurality of annular support plates 22 of the ejecting cover 20, and a space is formed among the ejecting cover 20, the annular support plates 22 and the limiting guide rails 21, so that the overall weight is reduced and the ejection is facilitated.

[0051] Further, an annular baffle 23 is arranged on the end of the ejecting cover 20 away from the mounting plate 11, and a plurality of second limiting flanges 24 are arranged on the end of the ejecting cover 20 close to the mounting plate 11. Each second limiting flange 24 is connected with the end of the corresponding limiting guide rail 21, and the end of the second limiting flange 24 away from the ejecting cover 20 is located on the inner side of the corresponding limiting guide rail 21.

[0052] When the ejecting cover 20 is not ejected, the end of the heating pipe 31 is bonded with the inner side of the annular baffle 23. When the ejecting cover 20 is ejected, the second limiting flange 24 on the ejecting cover 20 abuts against the corresponding first limiting flange 12 on the fixed cover 10, so that the ejecting cover 20 is not separated from the fixed cover 10.

[0053] Further, a first through hole 25 is arranged on each of the two second limiting flanges 24, and the two first through holes 25 are symmetrically arranged in the ejecting cover 20. A second through hole is arranged on the plurality of annular support plates 22 at positions corresponding to the first through holes 25. When the ejecting cover 20 is arranged on the fixed cover 10, the heating pipe 31 is located in the corresponding first through hole 25 and the second through hole.

[0054] When the ejection cover 20 is not ejected, the heating tube 31 passes through the corresponding first through hole 25 and the plurality of second through holes, and is bonded to the annular baffle 23, which can ensure the coaxiality of the ejection cover 20 and the fixed cover 10; after the ejection cover 20 is ejected, that is, the heating tube 31 is separated from the annular baffle 23, the direction of the ejection of the ejection cover 20 is guided through the cooperation of the heating tube 31 and the first through hole 25 and the plurality of second through holes, and the expansion precision is improved.

[0055] Further, the part of the fixed cover 10 between the adjacent two mounting plates 11 is recessed inward to form a groove 15, and the groove 15 is arranged at the end of the fixed cover 10 close to the mounting plate 11. The design of the plurality of grooves 15 can effectively reduce the weight of the fixed cover 10.

[0056] During specific installation, the first limiting flange 12 on the fixed cover 10 enters the ejection cover 20 from between the adjacent two limiting guide rails 21, and rotates, so that the first limiting flange 12 cooperates with the limiting guide rail 21, the second limiting flange 24 cooperates with the outer wall of the fixed cover 10, the second limiting flange 24 is engaged with the first limiting flange 12, the movable range of the ejection cover 20 is determined, then the heating tube 31 passes through the hole on the mounting plate 11, the first through hole 25 and the corresponding plurality of second through holes in sequence, and finally is bonded to the annular baffle 23. At the same time, the two ends of the memory metal spring 30 are bonded to the annular baffle 23 and the mounting plate 11 through heat-resistant adhesive, and the base 13 and the mounting plate 11 are also bonded through heat-resistant adhesive. When the ejection cover 20 is ejected, the heat of the heating wire 32 is radiated to the outer memory metal spring 30 through the heating tube 31.

[0057] The stable state of the memory metal spring 30 of the present application is the elongated state. Since the memory metal spring 30 has the characteristic of restoring the stable state shape when the temperature reaches above the memory temperature, this characteristic can be used as the power source for the expansion of the ejection cover 20. Figure 8 During installation, the ejection cover 20 is pressed to the contracted position (as shown in FIG. 6); when the camera reaches the working position, the heating wire 31 heats the memory metal spring 30, so that the temperature of the memory metal spring 30 reaches above the memory temperature, and the memory metal spring 30 is elongated to the stable state, and then the ejection cover 20 reaches the working position.

[0058] It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A pop-up sunshade based on a memory metal spring, characterized in that, include: A fixing cover (10) has multiple mounting plates (11) on one side end, and the multiple mounting plates (11) are evenly arranged along the outer circumference of the fixing cover (10). The fixing cover (10) has multiple first limiting flanges (12) on the other side end. Pop-out cover (20), the pop-out cover (20) is sleeved on the fixed cover (10), the inner wall of the pop-out cover (20) has multiple limiting guide rails (21), each limiting guide rail (21) is slidably connected to the corresponding first limiting flange (12); The side of the mounting plate (11) near the ejector cover (20) and the end of the ejector cover (20) away from the fixed cover (10) are connected by a memory metal spring (30). The memory metal spring (30) is sleeved on the outside of the heating tube (31). One end of the heating tube (31) is connected to the mounting plate (11), and the other end of the heating tube (31) is bonded to the ejector cover (20).

2. A pop-up sunshade based on a memory metal spring according to claim 1, characterized in that: A base (13) is mounted on the side of the mounting plate (11) away from the memory metal spring (30). Two power interfaces (14) are provided on the outside of the base (13). One end of the heating tube (31) passes through the mounting plate (11) and is connected to the base (13).

3. A pop-up sunshade based on a memory metal spring according to claim 2, characterized in that: The heating tube (31) is provided with a heating wire (32), which is electrically connected to a power interface (14), and the other end of the heating wire (32) extends to the end of the heating tube (31).

4. A pop-up sunshade based on a memory metal spring according to claim 3, characterized in that: Another power interface (14) is electrically connected to the heating tube (31).

5. A pop-up sunshade based on a memory metal spring according to claim 1, characterized in that: The inner wall of the pop-out cover (20) is provided with a plurality of annular support plates (22), and a plurality of limiting guide rails (21) are uniformly fixed on the inner wall of the plurality of annular support plates (22), and each limiting guide rail (21) is connected to the inner wall of the plurality of annular support plates (22).

6. A pop-up sunshade based on a memory metal spring according to claim 5, characterized in that: An annular baffle (23) is provided at the end of the ejector cover (20) away from the mounting plate (11), and a plurality of second limiting flanges (24) are provided at the end of the ejector cover (20) near the mounting plate (11). Each second limiting flange (24) is connected to the end of the corresponding limiting guide rail (21), and the end of the second limiting flange (24) away from the ejector cover (20) is located inside the corresponding limiting guide rail (21).

7. A pop-up sunshade based on a memory metal spring according to claim 6, characterized in that: Each of the two second limiting flanges (24) is provided with a first through hole (25). The two first through holes (25) are symmetrically arranged inside the pop-up cover (20). Each of the multiple annular support plates (22) is provided with a second through hole at a position corresponding to the first through hole (25). When the pop-up cover (20) is fitted onto the fixed cover (10), the heating tube (31) is located in the corresponding first through hole (25) and second through hole.

8. A pop-up sunshade based on a memory metal spring according to claim 1, characterized in that: The fixed cover (10) is recessed inward to form a groove (15) between two adjacent mounting plates (11), and the groove (15) is located on the fixed cover (10) near the end of the mounting plate (11).

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