Miniature lifting structure for braille display and braille point display

Abstract

The utility model discloses a miniature lifting structure used for Braille display and a Braille point display, the miniature lifting structure comprises a plurality of groups of lifting members, and each group of lifting members comprises a memory metal wire and a metal elastic sheet; one end of the memory metal wire is fixed on the fixed part of the metal elastic sheet, and the other end of the memory metal wire is fixed on the movable part of the metal elastic sheet; and the movable part of the metal elastic sheet is used for arranging a driven braille point display piece. According to the utility model, the volume of the braille point display can be reduced, and the number of displayed characters is increased.

Description

Technical Field

[0001] This utility model relates to the field of lifting control technology, and in particular to a miniature lifting structure for Braille display and a Braille dot display device. Background Technology

[0002] Braille displays allow visually impaired individuals to perceive and read information through touch, using dot-matrix characters. During the display process, each dot has only two static states: either in its original recessed state or in a raised display state. Currently, Braille displays typically use piezoelectric or electromagnetic actuation. Piezoelectric actuation requires relatively long piezoelectric ceramic materials to generate sufficient deformation, while electromagnetic actuation necessitates the inclusion of electromagnetic components, which are relatively large. Therefore, regardless of the actuation method used, Braille displays suffer from a relatively large size and a limited number of characters that can be displayed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a miniature lifting structure and a Braille dot display for Braille display, which can reduce the size of the Braille dot display and increase the number of characters displayed.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A miniature lifting structure for Braille display includes multiple sets of lifting components, each set of lifting components including a memory metal wire and a metal spring;

[0006] One end of the memory metal wire is fixed to the fixing part of the metal spring, and the other end of the memory metal wire is fixed to the movable part of the metal spring.

[0007] The movable part of the metal spring is used to set the driven Braille dot display.

[0008] Furthermore, the metal spring includes a first metal spring and a second metal spring;

[0009] The first metal spring and the second metal spring are opposite to each other and are offset.

[0010] Furthermore, it also includes a metal fixing plate, wherein a hollow window is provided in the middle of the metal fixing plate;

[0011] The fixing part of the metal spring in each set of lifting components is fixed to the metal fixing plate, and the projection area of ​​the metal spring on the metal fixing plate is located in the hollow window.

[0012] Furthermore, the shape memory metal wire is a straight line, and the movable part of the metal spring is provided with an extension;

[0013] One end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the other end of the memory metal wire is fixed to the extension part.

[0014] Furthermore, the shape memory metal wire is U-shaped, and the movable part of the metal spring is provided with an extension;

[0015] The open end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the bent end of the memory metal wire is wound around the extension part.

[0016] Furthermore, the memory metal wire is U-shaped, and the movable part of the metal spring is provided with an extension, and the extension is provided with a stud.

[0017] The open end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the bent end of the memory metal wire is wound around the nail post.

[0018] Furthermore, the straight line containing the shape memory metal wire is parallel to the plane containing the metal spring sheet.

[0019] Furthermore, a connecting portion is provided between the fixing portion of the metal spring and the extension portion, and a narrow hollow area is formed between the metal spring, the extension portion and the connecting portion;

[0020] The memory metal wire overlaps with the projection area of ​​the hollowed-out area on the metal fixing plate.

[0021] Furthermore, the diameter of the memory metal wire is less than or equal to 0.10 mm.

[0022] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is as follows:

[0023] A Braille dot display device includes the aforementioned miniature lifting structure for Braille display and a Braille dot display component.

[0024] The beneficial effects of this invention are as follows: the shape memory wire can change its shape by altering its temperature through electrical current. One end of the shape memory wire is fixed to the fixed part of a metal spring, and the other end is fixed to the movable part of the metal spring. The movable part of the metal spring is equipped with a driven lifting component. When the shape memory wire is energized, it deforms and expands, causing the movable part of the metal spring to deform vertically, which in turn drives the lifting component to move vertically. This invention amplifies the small deformation of the shape memory wire using a metal spring to drive lifting, allowing the shape memory wire to generate a large deformation in a small space, reducing the overall size of the device, and enabling the display of more dot matrix characters within the same device volume. Attached Figure Description

[0025] Figure 1 A schematic diagram of a miniature lifting structure for Braille display provided for an embodiment of this utility model;

[0026] Figure 2 A schematic diagram of the structure of a metal spring sheet provided in an embodiment of this utility model;

[0027] Figure 3 A structural schematic diagram of a lifting component provided in an embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of another lifting component provided in an embodiment of the present utility model;

[0029] Figure 5 A schematic diagram of a lifting component in a non-powered state provided by an embodiment of this utility model;

[0030] Figure 6 A schematic diagram of a lifting component in an energized state is provided for an embodiment of this utility model;

[0031] Figure 7 A schematic diagram of another lifting component provided in this embodiment of the utility model;

[0032] Figure 8 A schematic diagram of another lifting component provided in this embodiment of the present utility model;

[0033] Label Explanation:

[0034] A miniature lifting structure for Braille display; 11, lifting component; 111, memory metal wire; 112, metal spring; 1121, fixing part of metal spring; 1122, movable part of metal spring; 1123, extension part; 1124, connecting part; 1125, hollow area; 1126, stake; 1201, first metal spring; 1202, second metal spring; 12, metal fixing plate; 121, hollow window; 2, Braille dot display component. Detailed Implementation

[0035] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0036] An embodiment of this utility model provides a miniature lifting structure for Braille display, comprising multiple sets of lifting components, each set of lifting components comprising a memory metal wire and a metal spring;

[0037] One end of the memory metal wire is fixed to the fixing part of the metal spring, and the other end of the memory metal wire is fixed to the movable part of the metal spring.

[0038] The movable part of the metal spring is used to set the driven Braille dot display.

[0039] As described above, the beneficial effects of this invention are as follows: the shape memory wire can change its shape by altering its temperature through electrical current. One end of the shape memory wire is fixed to the fixed part of a metal spring, and the other end is fixed to the movable part of the metal spring. The movable part of the metal spring is equipped with a driven lifting component. When the shape memory wire is energized, it deforms and expands, causing the movable part of the metal spring to deform vertically, which in turn drives the lifting component to move vertically. This invention amplifies the small deformation of the shape memory wire using a metal spring to drive lifting, allowing the shape memory wire to generate a large deformation within a small space, reducing the overall size of the device, and enabling the display of more dot-matrix characters within the same device volume.

[0040] Furthermore, the metal spring includes a first metal spring and a second metal spring;

[0041] The first metal spring and the second metal spring are opposite to each other and are offset.

[0042] As described above, each lifting component includes a first metal spring and a second metal spring, which are positioned opposite each other and staggered to reduce the area occupied by the metal springs, thereby reducing the size of the Braille display. Furthermore, the current national standard GB / T 15720-1995 stipulates that the dot spacing and angular spacing between the dots of a dot matrix character are only 2-4 millimeters. By using a phase-staggered arrangement, the spacing and angular spacing between the dots of the dot matrix character can be guaranteed while achieving the lifting drive.

[0043] Furthermore, it also includes a metal fixing plate, wherein a hollow window is provided in the middle of the metal fixing plate;

[0044] The fixing part of the metal spring in each set of lifting components is fixed to the metal fixing plate, and the projection area of ​​the metal spring on the metal fixing plate is located in the hollow window.

[0045] As described above, fixing all the metal springs of the lifting components to the metal fixing plate facilitates the assembly of the equipment and helps to disperse the stress generated by the deformation of the metal springs, thereby improving the deformation capacity of the springs.

[0046] Furthermore, the shape memory metal wire is a straight line, and the movable part of the metal spring is provided with an extension;

[0047] One end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the other end of the memory metal wire is fixed to the extension part.

[0048] As described above, one end of the memory metal wire is fixed to the metal fixing plate, and the other end is fixed to the extension of the metal spring, so that the memory metal wire can produce a large deformation of the metal spring with a small deformation, thus ensuring the stability of the lifting.

[0049] Furthermore, the shape memory metal wire is U-shaped, and the movable part of the metal spring is provided with an extension;

[0050] The open end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the bent end of the memory metal wire is wound around the extension part.

[0051] As described above, since the shape memory metal wire is U-shaped, the force provided by one metal wire is equivalent to the force provided by two metal wires, which effectively improves the driving effect on the deformation of the metal spring.

[0052] Furthermore, the memory metal wire is U-shaped, and a stud is provided on the movable part of the metal spring sheet;

[0053] The open end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the bent end of the memory metal wire is wound around the nail post.

[0054] As can be seen from the above description, since the memory metal wire is U-shaped, setting a stake on the movable part of the metal spring makes it easier to install the memory metal wire and improves the connection stability between the metal spring and the memory metal wire.

[0055] Furthermore, the straight line containing the shape memory metal wire is parallel to the plane containing the metal spring sheet.

[0056] As described above, when the shape memory metal wire and the metal spring are parallel to each other, the force generated by the shape memory metal wire can be effectively applied to the metal spring, improving the utilization efficiency of the force of the shape memory metal wire. Furthermore, because the shape memory metal wire and the metal spring are parallel, the vertical space occupied by the device is reduced, thereby effectively reducing the device's size.

[0057] Furthermore, a connecting portion is provided between the fixing portion of the metal spring and the extension portion, and a narrow hollow area is formed between the metal spring, the extension portion and the connecting portion;

[0058] The memory metal wire overlaps with the projection area of ​​the hollowed-out area on the metal fixing plate.

[0059] As described above, a connecting part is provided between the fixed part and the extension part of the metal spring to ensure the stability of the metal spring when it deforms. At the same time, the memory metal wire is set on the hollow area formed by the three, which effectively disperses the stress generated by the deformation of the memory metal wire and improves the load-bearing capacity of the metal spring.

[0060] Furthermore, the diameter of the memory metal wire is less than or equal to 0.10 mm.

[0061] As described above, the current required for the shape memory wire to reach the phase transition temperature within this diameter range is relatively low, which can effectively reduce power consumption and has high heat dissipation efficiency. The shape memory wire recovers its initial shape quickly, which effectively improves the lifting efficiency of the lifting component.

[0062] Another embodiment of this utility model provides a Braille dot display device, including the above-mentioned miniature lifting structure for Braille display and Braille dot display component.

[0063] This utility model provides a miniature lifting structure and a Braille dot display for Braille display, which can reduce the size of the Braille dot display and increase the number of characters displayed. The following is an illustration through specific embodiments:

[0064] Please refer to Figures 1 to 6 Embodiment 1 of this utility model is as follows:

[0065] like Figure 1As shown, a miniature lifting structure 1 for Braille display includes multiple sets of lifting components 11. Each set of lifting components 11 includes a memory metal wire 111 and a metal spring 112. One end of the memory metal wire 111 is fixed to the fixing part 1121 of the metal spring 112, and the other end of the memory metal wire 111 is fixed to the movable part 1122 of the metal spring 112. The movable part 1122 of the metal spring 112 is used to set the driven Braille dot display 2. Specifically, the metal spring 112 includes a first metal spring 1201 and a second metal spring 1202. The first metal spring 1201 and the second metal spring 1202 are opposite to each other and offset. In an optional embodiment, in order to further reduce the volume of the Braille dot display, the shapes of the relatively offset first metal spring 1201 and the second metal spring 1202 are matched. It should be noted that a Braille dot display 2 is provided on the first metal spring 1201 and the second metal spring 1202 respectively. That is, a set of lifting components 11 can drive two Braille dot display 2 respectively, so that every two Braille dot display 2 are arranged in a group, which facilitates the Braille dot display to be combined and arranged in various ways to increase the number of characters that the Braille dot display can display.

[0066] like Figure 2 As shown, the straight line containing the shape memory metal wire 111 is parallel to the plane containing the metal spring 112.

[0067] like Figure 3 As shown, specifically, the miniature lifting structure 1 also includes a metal fixing plate 12, and a hollow window 121 is provided in the middle of the metal fixing plate 12; the fixing part 1121 of the metal spring 112 in each group of lifting components 11 is fixed on the metal fixing plate 12, and the projection area of ​​the metal spring 112 on the metal fixing plate 12 is located in the hollow window 121.

[0068] In this embodiment, the memory metal wire 111 is a straight line, and the movable part 1122 of the metal spring 112 is provided with an extension part 1123; one end of the memory metal wire 111 is fixed to the side of the metal fixing plate 12 near the fixing part 1121 of the metal spring 112, and the other end of the memory metal wire 111 is fixed to the extension part 1123.

[0069] like Figure 4 As shown, specifically, a connecting part 1124 is provided between the fixing part 1121 and the extension part 1123 of the metal spring 112, and a narrow hollow area 1125 is formed between the metal spring 112, the extension part 1123 and the connecting part 1124; the projection area of ​​the memory metal wire 111 and the hollow area 1125 on the metal fixing plate 12 overlaps.

[0070] In one alternative implementation, a metal spring 112 may be provided with multiple memory metal wires 111 to provide greater tensile force to the metal spring 112.

[0071] In one optional embodiment, the diameter of the shape memory metal wire 111 is less than or equal to 0.10 mm. In this embodiment, the diameter of the selected shape memory metal wire 111 is in the range of 0.02 mm to 0.05 mm.

[0072] The above describes the working principle of the miniature lifting structure, specifically as follows: Figure 5 As shown, when the memory metal wire 111 is not energized, it maintains its initial shape and does not exert any force on the metal spring 112. The metal spring 112 remains in its original state. At this time, the metal spring 112 and the memory metal wire 111 are approximately flat planar structures. Therefore, the Braille dot display 2 lacks support and thus maintains its current state. Figure 6 As shown, when the memory metal wire 111 is energized, it deforms and contracts, exerting a force on the movable part 1122 of the metal spring 112. This pulls the movable part 1122 upward, creating an upward supporting force below the Braille dot display 2, causing it to move upward and rise. When the power to the memory metal wire 111 is de-energized, it returns to its initial shape, thus restoring its original position. Figure 5 The state shown.

[0073] Please refer to Figure 7 Embodiment two of this utility model is as follows:

[0074] A miniature lifting structure 1 for Braille display differs from Embodiment 1 in that: the memory metal wire 111 is U-shaped, and the movable part 1122 of the metal spring 112 is provided with an extension 1123; the open end of the memory metal wire 111 is fixed to the side of the metal fixing plate 12 near the fixing part 1121 of the metal spring 112, and the bent end of the memory metal wire 111 is wound around the extension 1123.

[0075] It should be noted that the plane where the memory metal wire 111 is located is perpendicular to the plane where the metal spring 112 is located, so that the U-shape of the memory metal wire 111 can be wound around the extension 1123.

[0076] Please refer to Figure 8 Embodiment three of this utility model is as follows:

[0077] A miniature lifting structure 1 for Braille display differs from Embodiment 1 in that: the memory metal wire 111 is U-shaped, an extension 1123 is provided on the movable part 1122 of the metal spring 112, and a post 1126 is provided on the extension 1123; the open end of the memory metal wire 111 is fixed to the side of the metal fixing plate 12 near the fixing part 1121 of the metal spring 112, and the bent end of the memory metal wire 111 is wound around the post 1126.

[0078] It should be noted that the plane where the memory metal wire 111 is located is parallel to the plane where the metal spring 112 is located, so that the U-shape of the memory metal wire 111 can be wound around the nail 1126.

[0079] Embodiment four of this utility model is as follows:

[0080] A Braille dot display device includes a miniature lifting structure 1 and a Braille dot display component 2, which are any one of the above embodiments one to three for Braille display.

[0081] In summary, this utility model provides a miniature lifting structure and a Braille dot display for Braille displays. One end of a memory metal wire is fixed to the fixed part of a metal spring, and the other end is fixed to the movable part of the metal spring. The movable part of the metal spring is equipped with a driven lifting component. When the memory metal wire is energized, it deforms and expands, causing the movable part of the metal spring to deform vertically, thereby driving the lifting component to move vertically. Since the metal spring and memory metal wire are approximately flat planar structures when not driven, the miniature lifting structure only needs to reserve space in the vertical direction for the metal spring to deform and move vertically. Compared to electromagnetically driven Braille dot displays, this effectively saves the height space of the device. Furthermore, since the memory metal wire changes its deformation through temperature changes when energized, there is no need to adjust the length of the memory metal wire and the metal spring excessively. Therefore, the area occupied by the miniature lifting structure in the horizontal direction only needs to be the same as the area of ​​the dot display component. Compared to piezoelectrically driven Braille dot displays, this effectively saves the device's footprint, allowing the dot displays to be arranged more closely to display more dot matrix characters. This invention uses a metal spring to amplify the small deformation of the memory metal wire and drive it to rise and fall, so that the memory metal wire can generate a large deformation in a small space, reducing the overall size of the device.

[0082] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A miniature lifting structure for Braille display, characterized in that, It includes multiple sets of lifting components, each set of which includes a memory metal wire and a metal spring; One end of the memory metal wire is fixed to the fixing part of the metal spring, and the other end of the memory metal wire is fixed to the movable part of the metal spring. The movable part of the metal spring is used to set the driven Braille dot display.

2. The miniature lifting structure for Braille display according to claim 1, characterized in that, The metal spring includes a first metal spring and a second metal spring; The first metal spring and the second metal spring are opposite to each other and are offset.

3. The miniature lifting structure for Braille display according to claim 1, characterized in that, It also includes a metal fixing plate, wherein a hollow window is provided in the middle of the metal fixing plate; The fixing part of the metal spring in each set of lifting components is fixed to the metal fixing plate, and the projection area of ​​the metal spring on the metal fixing plate is located in the hollow window.

4. A miniature lifting structure for Braille display according to claim 3, characterized in that, The memory metal wire is straight, and the movable part of the metal spring is provided with an extension; One end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the other end of the memory metal wire is fixed to the extension part.

5. A miniature lifting structure for Braille display according to claim 3, characterized in that, The memory metal wire is U-shaped, and the movable part of the metal spring is provided with an extension; The open end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the bent end of the memory metal wire is wound around the extension part.

6. A miniature lifting structure for Braille display according to claim 3, characterized in that, The memory metal wire is U-shaped, and the movable part of the metal spring is provided with an extension, and the extension is provided with a stud. The open end of the memory metal wire is fixed to the side of the metal fixing plate near the fixing part of the metal spring, and the bent end of the memory metal wire is wound around the nail post.

7. A miniature lifting structure for Braille display according to claim 1, characterized in that, The straight line containing the memory metal wire is parallel to the plane containing the metal spring.

8. A miniature lifting structure for Braille display according to claim 4 or 5, characterized in that, A connecting part is provided between the fixing part of the metal spring and the extension part, and a narrow hollow area is formed between the metal spring, the extension part and the connecting part; The memory metal wire overlaps with the projection area of ​​the hollowed-out area on the metal fixing plate.

9. A miniature lifting structure for Braille display according to claim 1, characterized in that, The diameter of the memory metal wire is less than or equal to 0.10 mm.

10. A Braille dot display, characterized in that, Includes a miniature lifting structure and a Braille dot display as described in any one of claims 1-9.

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