A braille dot display

Abstract

The application discloses a Braille point display device, which comprises a display module, a locking part, and at least two driving parts. The display module has a movable end and a fixed end. The movable end is arranged through the locking part at least partially. The locking part is arranged on the fixed end in a relative sliding manner along a first linear direction of the locking part. The at least two driving parts are symmetrically arranged. The driving parts are distributed along the first linear direction and are in transmission connection with the locking part. The two driving parts are arranged in a spaced manner along the first linear direction. The first linear direction is the width direction or the length direction of the display module. The application can reduce the energy consumption and the heat generation of the Braille point display device and improve the switching efficiency of Braille symbols.

Description

Technical Field

[0001] This invention relates to the field of reading devices for the blind, and in particular to a Braille dot display. Background Technology

[0002] A Braille display is an electromechanical assistive device designed specifically for visually impaired individuals. It displays Braille characters by raising different dots on a flat surface. Each Braille character consists of raised dots and recessed spaces, allowing visually impaired individuals to perceive and read them through touch. This device converts electronic text into a Braille dot matrix, enabling blind users who cannot use conventional display devices to experience text through touch.

[0003] Existing Braille displays consist of several dot display units, each containing six contacts. Each contact forms several combinations by protruding from or within the plane, with each combination representing a Braille symbol. Blind people read by touch, replacing sight. Because the raised dots tend to retract into the plane under touch or gravity, a continuous driving force is needed to maintain their position. This requires a continuous power supply to the mechanism driving the dots, resulting in high power consumption for the Braille display. The larger the display area, the higher the power consumption. Furthermore, traditional Braille displays typically use electromagnetic drives to control the contact lifting and lowering. Electromagnetic drives require a large current to generate the magnetic force, thus consuming significant power. While increasing the number of coil turns increases the electromagnetic force, this also increases resistance, leading to increased heat generation and affecting touch comfort. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a Braille dot display device that reduces power consumption and heat generation.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A Braille dot display includes: The display module has a movable end and a fixed end; A locking member, wherein the movable end is at least partially disposed through the locking member, and the locking member is slidably disposed on the fixed end relative to the locking member along a first linear direction of the locking member; At least two symmetrically arranged driving members are distributed along the first straight line direction and are connected to the locking member in a transmission manner, and the two driving members located in the first straight line direction are spaced apart. The first straight line direction is the width direction or the length direction of the display module.

[0006] The beneficial effects of this invention are as follows: By using at least two symmetrically arranged driving members to reciprocate the locking member in a first linear direction, the movable end of the display module is locked and unlocked. When the locking member is in the locked state, the combination formed by the display module is maintained, thereby preserving the formed Braille symbol. When the locking member is in the unlocked state, the display module resets. By changing the retention state of the Braille symbol through dual driving members, the working time of the display module is shortened, thereby reducing the power consumption and heat generation of the display module. Attached Figure Description

[0007] Figure 1 This is a partial structural diagram of the Braille display device in this invention. Figure 1 and enlarged details; Figure 2 This is a partial structural diagram of the Braille dot display in the locked state in this invention; Figure 3 for Figure 2 Enlarged view of section A; Figure 4 for Figure 3 Top view and enlarged detail; Figure 5 This is a partial structural diagram of the Braille dot display in the unlocked state in this invention; Figure 6 for Figure 5 Enlarged view of section B; Figure 7 for Figure 5 Top view and enlarged detail; Figure 8 This is a schematic diagram of the dot display unit in this invention; Figure 9 This is a cross-sectional view of the dot display unit in this invention; Figure 10 This is a schematic diagram of the shape memory alloy plate in this invention; Figure 11 This is a schematic diagram of the driving component in this invention.

[0008] Label Explanation: 1. Display module; 11. Movable end; 12. Fixed end; 13. Dot display unit; 131. Touch body; 132. Limiting ring; 133. Card slot; 134. Driver; 1341. Body; 1342. Shape memory alloy plate; 1343. Deformation lifting part; 135. Metal part; 136. Magnetic part; 14. First side; 15. Second side; 16. Unlocking end; 17. Locking end; 2. Locking element; 21. Slide groove; 211. Locking part; 3. Driving component; 31. Shape memory alloy wire; 32. Positive conductive component; 33. Negative conductive component; 34. Metal spring; 4. Cover plate. Detailed Implementation

[0009] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0010] Please refer to Figures 1-11 A Braille display device, comprising: Display module 1 has a movable end 11 and a fixed end 12; The locking member 2 has a movable end 11 that at least partially passes through it, and the locking member 2 can slide relative to the fixed end 12 along a first straight direction. At least two symmetrically arranged driving members 3 are distributed along a first straight line direction and are connected to the locking member 2 in a transmission manner, and the two driving members 3 located in the first straight line direction are spaced apart. The first straight line direction is the width or length direction of display module 1.

[0011] Understandably, by using at least two symmetrically arranged driving members 3 to drive the locking member 2 to reciprocate in the first linear direction, the movable end 11 of the display module 1 is locked and unlocked. When the locking member 2 is in the locked state, the combination formed by the display module 1 can be maintained, thereby maintaining the formed Braille symbol. When the locking member 2 is in the unlocked state, the display module 1 is reset. By changing the holding state of the Braille symbol through the dual driving members 3, the working time of the display module 1 is shortened, thereby reducing the power consumption and heat generation of the display module 1.

[0012] In some embodiments, the driving element 3 includes a shape memory alloy wire 31, a positive conductive element 32, and at least two negative conductive elements 33; the positive conductive element 32, the shape memory alloy wire 31, the locking element 2, and the negative conductive elements 33 are connected sequentially to form a conductive path. Utilizing the deformation characteristics of the shape memory alloy wire 31, the moving direction of the locking element 2 is changed, thereby achieving locking and unlocking of the movable end 11 of the display module 1. Specifically, each driving element 3 includes two negative conductive elements 33, forming a conductive path with one positive and two negative electrodes. Since the deformation of the shape memory alloy wire 31 depends on the magnitude of the current, i.e., as the current increases, the deformation of the shape memory alloy wire 31 increases, and vice versa, when the deformation of the shape memory alloy wire 31 increases, the traction force of the shape memory alloy wire 31 on the locking element 2 also increases, thereby enabling the locking element 2 to move unidirectionally. During the movement of the locking member 2, the current of the corresponding shape memory alloy wire 31 is changed according to the required direction of movement, while the current of the other shape memory alloy wire 31 remains unchanged, so that the two ends of the locking member 2 are subjected to unbalanced forces in the first straight direction and move, thereby realizing the locking and unlocking of the movable end 11 of the display module 1.

[0013] Optionally, the number of shape memory alloy wires 31 can be two or more, but the total number should be even. For example, when the number of shape memory alloy wires 31 is four, two wires are set in the positive direction of the first straight line and two wires are also set in the negative direction. When the number of shape memory alloy wires 31 is more than two, the switching speed and accuracy of the locking component can be improved, thereby improving the tactile display refresh speed of the Braille dot display.

[0014] In some embodiments, all negative conductive elements 33 are symmetrically arranged with the central axis of the positive conductive element 32 as the axis of symmetry to ensure that the locking element 2 is subjected to balanced force and to ensure the stability of the locking element 2 when it moves.

[0015] In some embodiments, the negative conductive element 33 is electrically connected to the locking element 2 via a metal spring 34. Preferably, the metal spring 34 is a leaf spring. The metal spring 34 serves two purposes: firstly, it conducts electricity, connecting the locking element 2 to the negative conductive element 33; secondly, it provides traction for the locking element 2, allowing it to reset when the traction force of the shape memory alloy wire 31 on the same side is removed, thereby improving the reset efficiency of the locking element 2 and thus increasing the Braille symbol switching speed of the display module 1.

[0016] In some embodiments, the display module 1 includes at least two dot display units 13; all the dot display units 13 are arranged in an array. Preferably, each display module 1 includes fifty dot display units 13, and each dot display unit 13 includes two contacts. In other equivalent embodiments, other numbers of dot display units 13 may be provided according to actual needs.

[0017] In some embodiments, the dot display unit 13 includes a touch body 131; the locking member 2 includes a groove 21, and a locking part 211 is provided at one end of the groove 21 in the direction of movement; the side wall of the touch body 131 has a limiting ring 132, and the limiting ring 132 and the outer wall of the touch body 131 form a slot 133, and the locking part 211 can be inserted into or disengaged from the slot 133. Specifically, the contact point is located on the touch body 131; in the axial direction of the touch body 131, the outer diameters of the portions of the touch body 131 located on both sides of the limiting ring 132 are equal to avoid interference of the unlocked touch body 131 with the locking member 2. When the locking member 2 is in the locked state and the touch body 131 is in the raised state, the locking part 211 is embedded in the slot 133, and after the corresponding dot display unit 13 is powered off, the limiting ring 132 will fall on the locking member 2; when the locking member 2 is in the locked state and the touch body 131 is not raised, the locking part 211 of the locking member 2 is located above the limiting ring 132.

[0018] In some embodiments, the dot display unit 13 further includes a driver 134, a metal part 135, and a magnetic attractor 136; the metal part 135 and the magnetic attractor 136 are respectively disposed at the bottom of the touch body 131 and within the driver 134, and the metal part 135 and the magnetic attractor 136 are disposed opposite to each other. The metal part 135 and the magnetic attractor 136 are configured to change the rapid reset of the touch body 131. Specifically, when the locking member 2 is in the unlocked state, the magnetic attractor 136 attracts the metal part 135, thereby causing the touch body 131 to descend, improving the Braille symbol switching speed of the display module 1. Optionally, the metal part 135 can be a steel ball or a metal sheet. Preferably, the metal part 135 is a steel ball embedded in the bottom of the touch body 131, and the magnetic attractor 136 is a magnet. Further, the metal part 135 can be integrally injection molded with the touch body 131.

[0019] In some embodiments, the driver 134 includes a body 1341 and a shape memory alloy plate 1342; the shape memory alloy plate is electrically connected to the body 1341 and is disposed between the metal part 135 and the magnetic attractor 136; the shape memory alloy plate 1342 has a deformation lifting part 1343, which is used to control the lifting and lowering of the touch body 131. Specifically, the deformation lifting part 1343 has a free end and a fixed end 12. By changing the current applied to the shape memory alloy plate 1342, the lifting height of the free end of the deformation lifting part 1343 is changed, thereby changing the lifting and lowering height of the touch body 131 and realizing the position change of the touch body 131.

[0020] In some embodiments, the shape memory alloy wire 31 is centrally disposed in the second linear direction of the display module 1; the second linear direction is perpendicular to the first linear direction to improve the force balance of the locking member 2.

[0021] In some embodiments, the locking portion 211 is a notch adapted to the slot 133. Further, the diameter of the notch should be smaller than the outer diameter of the limiting ring 132 to ensure the reliability of the locking member 2.

[0022] Reference Figures 1-11 Embodiment 1 of the present invention is as follows: A Braille display includes a display module 1, a locking member 2, a cover plate 4, and two symmetrically arranged driving members 3. The display module 1 has a movable end 11 and a fixed end 12. The movable end 11 of the display module 1 passes through the locking member 2, and the locking member 2 is slidably mounted on the fixed end 12 along a first straight line direction. The two driving members 3 are distributed along the first straight line direction and are connected to the locking member 2 in a transmission manner, and are spaced apart from each other. The first straight line direction is the width direction of the display module 1. The cover plate 4 covers the display module 1 and is located below the locking member 2. Specifically, the display module 1 has a first side 14 and a second side 15 that are parallel to each other.

[0023] In this embodiment, the display module 1 includes fifty dot display units 13; all the dot display units 13 are arranged in an array.

[0024] In this embodiment, the dot display unit 13 includes a touch body 131, a driver 134, a metal part 135, and a magnetic attractor 136; the locking member 2 includes a slide groove 21, and a locking part 211 is provided at one end of the slide groove 21 in the direction of movement; the side wall of the touch body 131 has a limiting ring 132, and the limiting ring 132 and the outer wall of the touch body 131 form a slot 133, and the locking part 211 can be inserted into or removed from the slot 133. The metal part 135 and the magnetic attractor 136 are respectively disposed at the bottom of the touch body 131 and in the driver 134, and the metal part 135 and the magnetic attractor 136 are disposed opposite to each other. Preferably, the metal part 135 is a steel ball, which is embedded in the bottom of the touch body 131, and the magnetic attractor 136 is a magnet. The locking part 211 is a notch adapted to the slot 133, and further, the diameter of the notch should be smaller than the outer diameter of the limiting ring 132. The movable end 11 of the display module 1 is located at the end of the touch body 131 away from the driver 134, and the fixed end 12 of the display module 1 is located on the driver 134. The locking member 2 is provided with a locking part 211 near the edge of the second side 15, and the touch bodies 131 in the same row near the second side 15 do not pass through the locking member 2, but cooperate with the locking part located at the edge of the locking member 2 to realize the locking and unlocking of the touch bodies 131.

[0025] In this embodiment, the driver 134 includes a body 1341 and a shape memory alloy plate 1342; the shape memory alloy plate is electrically connected to the body 1341, and the shape memory alloy plate 1342 is disposed between the metal part 135 and the magnetic suction part 136; the shape memory alloy plate 1342 has a deformation lifting part 1343, which is used to control the lifting and lowering of the touch body 131. Specifically, the deformation lifting part 1343 has a free end and a fixed end 12.

[0026] In this embodiment, the driving component 3 includes a shape memory alloy wire 31, a positive conductive element 32, and two negative conductive elements 33. The positive conductive element 32, the shape memory alloy wire 31, the locking element 2, and the negative conductive elements 33 are connected sequentially to form a conductive path. The shape memory alloy wire 31 is centrally located in the second straight line direction of the display module 1; the second straight line direction is perpendicular to the first straight line direction. All the negative conductive elements 33 are symmetrically arranged about the central axis of the positive conductive element 32. The negative conductive elements 33 are electrically connected to the locking element 2 through a metal spring 34. Preferably, the metal spring 34 is a leaf spring. Specifically, the positive conductive element 32 and the negative conductive element 33 are connected to the edge of the cover plate 4, and the positive conductive element 32 and the negative conductive element 33 within the same driving component 3 are located on the same side of the cover plate 4.

[0027] It is worth noting that the display module 1 is defined to have an unlocking end 16 and a locking end 17 in the first straight line direction, and the touch body 131 in the rising state is defined as a display bump, and the touch body 131 in the non-rising state is defined as a non-display bump.

[0028] The working principle of this invention is as follows: Reference Figures 2-4 In the locked state: according to the Braille symbol to be formed, the current of the corresponding dot display unit 13 is increased, the deformation lifting part 1343 of the shape memory alloy plate 1342 deforms, causing the display bump to rise, and the current of the shape memory alloy wire 31 located at the locking end 17 is increased, causing the locking member 2 to move toward the locking end 17, the corresponding locking part 211 is embedded in the slot 133, the current of the dot display unit 13 is reduced, and the limiting ring 132 is pressed against the locking member 2, so that the display bump is maintained; while the remaining locking parts 211 are located above the limiting ring 132 of the non-display bump. Reference Figures 5-7 Unlocked state: Reduce the current of the shape memory alloy wire 31 located at the locking end 17 and increase the current of the shape memory alloy wire 31 located at the unlocking end 16, so that the locking part 2 moves toward the unlocking end 16, all the locking parts 211 separate from the slot 133, and under the attraction of the magnetic part 136 to the metal part 135, all the touch body 131 descends.

[0029] In summary, this invention uses two symmetrically arranged driving components to change the position of the locking component in the first linear direction, thereby achieving the locking and unlocking of the touch object. When the touch object rises, it is locked by the locking component, allowing the touch object to remain in the rising state, thus reducing current consumption and eliminating the need to maintain a high current state, thereby reducing current loss. Furthermore, the use of two driving components improves the switching efficiency of Braille symbols. In addition, compared to traditional electromagnetically driven dot displays, it eliminates permanent magnets and electromagnetic coils, fundamentally eliminating electromagnetic interference. Its non-magnetic characteristics are particularly suitable for applications sensitive to electromagnetic environments.

[0030] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A Braille dot display, characterized in that, include: The display module has a movable end and a fixed end; A locking member, wherein the movable end is at least partially disposed through the locking member, and the locking member is slidably disposed on the fixed end relative to the locking member along a first linear direction of the locking member; At least two symmetrically arranged driving members are distributed along the first straight line direction and are connected to the locking member in a transmission manner, and the two driving members located in the first straight line direction are spaced apart. The first straight line direction is the width direction or the length direction of the display module.

2. The Braille display device according to claim 1, characterized in that, The driving component includes a shape memory alloy wire, a positive conductive element, and at least two negative conductive elements; The positive conductive element, the shape memory alloy wire, the locking element, and the negative conductive element are connected in sequence to form a conductive path.

3. A Braille display device according to claim 2, characterized in that, All of the negative electrode conductive components are arranged symmetrically with respect to the central axis of the positive electrode conductive component.

4. A Braille display device according to claim 3, characterized in that, The negative conductive component is electrically connected to the locking component via a metal spring.

5. A Braille display device according to claim 1, characterized in that, The display module includes at least two dot display units; All the dot display units are arranged in an array.

6. A Braille display device according to claim 5, characterized in that, The dot display unit includes a touch body; The locking member includes a slide groove, and a locking part is provided at one end of the slide groove in the direction of movement; The side wall of the touch body has a limiting ring, and the limiting ring and the outer wall of the touch body form a slot, and the locking part can be inserted into or disengaged from the slot.

7. A Braille display device according to claim 6, characterized in that, The dot display unit also includes a driver, a metal component, and a magnetic component; The metal component and the magnetic component are respectively disposed at the bottom of the touch body and inside the driver, and the metal component and the magnetic component are disposed opposite to each other.

8. A Braille dot display according to claim 7, characterized in that, The driver includes a body and a shape memory alloy plate; The shape memory alloy plate is electrically connected to the body, and the shape memory alloy plate is disposed between the metal part and the magnetic attraction part; The shape memory alloy plate has a deformation lifting section, which is used to control the lifting and lowering of the touch body.

9. A Braille display device according to claim 2, characterized in that, The shape memory alloy wire is centrally positioned in the second straight direction of the display module; The second straight line direction is perpendicular to the first straight line direction.

10. A Braille display device according to claim 6, characterized in that, The locking part is a notch that matches the slot.

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