Electromagnetic driving braille point display structure and driving method thereof

Abstract

The invention discloses an electromagnetic drive braille point display structure. The structure comprises a shell; the driving part is made of a magnetic conductor material; the driven part is made of a non-magnetizer material; the spring piece has an elastic reset function; 3, opening a loop line; a display point; the three-open-loop line drives the driving piece to move through an electromagnetic field, the driving piece drives the driven piece to move through mechanical linkage, the spring piece locks the position of the driven piece when the state is changed, and the display state is maintained with low power consumption. The structure is used for overcoming the obvious defects of low refresh frequency, high power consumption, serious heating, large size and the like of a common electromagnetic driving method, three open-loop lines realize electric field position change through three interface voltage state change of one coil to drive state change, and the horizontal display area of braille points is reduced. The driving part authority lock enables the mechanical structure to maintain the state and reduce energy loss, each display unit is independent, the display speed is controlled by the magnitude of current, and the refresh frequency is high.

Description

Technical Field

[0001] This invention relates to the field of Braille dot display technology, specifically to an electromagnetically driven Braille dot display structure. Background Technology

[0002] As a core device for visually impaired individuals to achieve digital reading, the technological evolution of Braille displays has always revolved around three core requirements: driving efficiency, cost control, and portability. While current mainstream electromagnetic, piezoelectric ceramic, and shape-memory metal driving solutions have each achieved technological breakthroughs, they all suffer from significant technical bottlenecks that hinder the widespread application of Braille displays.

[0003] The main directions for Braille displays are electromagnetic drive schemes, piezoelectric ceramic schemes, and shape memory metal schemes.

[0004] Traditional electromagnetic actuators are limited by the inertia of the iron core and the remanent magnetization effect, resulting in contact switching speeds generally below 20Hz, which is insufficient for high-speed reading requirements. While layered electromagnetic Braille displays increase contact density through staggered arrangement, the single-point refresh rate is still limited to 17.7Hz. Furthermore, maintaining contact states with continuous power leads to power consumption as high as 10-15W, which can easily cause overheating during prolonged use. Electromagnetic actuators also require large electromagnetic coils and iron cores, resulting in devices that are generally over 30mm thick, hindering portability.

[0005] Piezoelectric ceramics can achieve precision displacement of 0.7mm, meeting the 0.45mm stroke requirement of Braille touch points, but their raw material cost is as high as $100-150 per point, and a single 20-point device costs more than $2,000, far exceeding the affordability of ordinary visually impaired users.

[0006] Shape memory alloys require electric current heating to trigger a phase change, and the contact switching time is generally over 100ms, far lower than the 10-20ms of electromagnetic drive. One shape memory alloy Braille display device, due to its slow response speed, cannot support real-time voice-synchronized reading scenarios. Summary of the Invention

[0007] To overcome the shortcomings of existing technical solutions, this invention provides an electromagnetically driven Braille dot display structure, which can effectively solve the problems of low refresh rate, high power consumption, severe heat generation, and large size of ordinary electromagnetically driven methods proposed in the background technology.

[0008] The technical solution adopted by this invention to solve its technical problem is: an electromagnetically driven Braille dot display structure, comprising: case; The driving component is made of a magnetic conductor material; The passive component is made of a non-magnetic material; Spring sheet, with elastic restoring function; The three-loop line has three external interfaces, and the location of electromagnetic field generation can be changed by controlling the voltage state of different interfaces. The display point is located at the top of the passive component; Among them, the three open-loop lines drive the displacement of the driving component through the electromagnetic field, and the driving component drives the displacement of the passive component through mechanical linkage. When the state changes, the spring plate locks the position of the passive component, so as to maintain the display state with low power consumption.

[0009] Furthermore, the driving component includes a first trapezoidal block and a second trapezoidal block, wherein the first trapezoidal block is flipped over and stacked on the front side of the second trapezoidal block and fixedly connected to the second trapezoidal block.

[0010] Furthermore, the passive component includes a connecting rod, a protrusion, and a fixing block. The protrusion with a triangular cross-section is located near both ends of the connecting rod, and the fixing block is located at both ends of the connecting rod. Two spring plates are respectively provided on both sides of the passive component. The openings of the two spring plates face the center of the passive component and are arranged to form a barb-shaped structure. Two-section grooves are provided at the upper and lower ends of the inner side of the housing. When the passive component is pushed, the spring plates are inserted into the two-section grooves, and the barb-shaped structure of the spring plates completes the self-locking of the up-and-down sliding. The surface of the passive component and the driving component that contacts each other is provided with a concave rail.

[0011] Furthermore, a through hole is provided in the middle of the housing, and the projection of the through hole coincides with the projection of the fixing block of the passive component.

[0012] Furthermore, the spring sheet has a connecting part in the middle, and the two ends of the connecting part have curled parts. The connecting part has a pad in the middle, and the pad is placed on the surface of the connecting part in the protruding direction of the curled part. The driving member has blocking blocks at the upper and lower ends for retracting the spring sheet. When the driving member moves, the blocking blocks first contact the spring sheet, and then the spring sheet is compressed to release the locking state of the driven member.

[0013] Furthermore, the electromagnetic field control method of the three open-loop lines is as follows: when the middle outer interface is connected to the negative pole and the upper port is connected to the positive pole, an electric field is formed in the upper half; when the lower port is connected to the positive pole, an electric field is formed in the lower half, and the displacement of the driving component is driven by the change of the electric field position.

[0014] Furthermore, the linkage between the driving component and the passive component is as follows: the driving component unlocks by pushing out the spring plate through the upward inclined surface, causing the passive component to move upward; after the passive component moves upward, the spring plate returns to its original position and locks, achieving stable display of the display point; or, when the driving component moves, the blocking blocks at its upper and lower ends first contact the spring plate to compress and unlock it. After the spring plate contacts the lock, the driving component, together with the protrusions on it, exerts a pushing force on the top or bottom of the concave rail on the passive component, causing the passive component to protrude or dent, thereby causing the display point set on the top of the passive component to rise or fall, forming a protrusion or dent.

[0015] Furthermore, the linkage between the driving component and the passive component is not limited to the overlapping protrusion driving. It can be achieved by the driving component having a groove in the middle to clamp the passive component, the driving component having an opening in the center to embed the passive component, or the driving component being split into multiple parts to jointly complete the driving function.

[0016] Furthermore, the driving component is provided with protrusions.

[0017] A method for driving a Braille dot display includes the following steps: Step 1: Driving, by controlling the voltage state of different interfaces through three open loop lines, the position of electromagnetic field generation is changed, which drives the displacement of the driving component; Step 2: Unlocking. The driving component moves upward and pushes out the spring plate through the upward inclined surface, unlocking the passive component and causing it to move upward, displaying Braille dots. Step 3: Locking. After the passive component moves upward a certain distance, the spring plate returns to its original position and locks, maintaining a stable display state of the display point; Step 4: Retract, reverse the three-loop drive, the drive component moves downward, pushes out the spring plate through the downward inclined surface, unlocks the passive component, drives the passive component to move downward, and retracts the display point.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: by optimizing the electromagnetic drive scheme, the display components (passive components and display points) are separated from the drive components (drive components, three-loop lines, etc.), and a mechanical lock (spring plate) controlled only by the drive components is added; this makes the functions of each component clearer, allowing them to work independently yet collaboratively, improving the rationality and stability of the overall structure. The pure mechanical structure changes the state of a single display device through electromagnetic drive, reducing complex electrical connections and signal transmissions, lowering the risk of equipment malfunction due to electrical faults, and improving the reliability and durability of the equipment. The three-loop wire changes the electric field position by changing the voltage state of the three interfaces of a coil, thereby reducing the horizontal area of ​​the Braille dot display. The drive component access lock (the locking function of the spring plate on the passive component in a specific state) allows the mechanical structure to maintain its state, thereby reducing energy consumption. After the display point reaches the preset position, there is no need to continuously consume energy to maintain its state. It is only driven again when the display content needs to be changed, effectively saving energy and extending the device's battery life. Each display unit is independent, meaning that each display point can be controlled individually without interference. This allows the display speed to be controlled by the current, resulting in a high refresh rate and the ability to quickly and accurately change the displayed content. This meets the timeliness needs of blind users for information acquisition and improves the user experience. Attached Figure Description

[0019] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a perspective view of the structure of the present invention without the three open loops; Figure 3 This is a perspective view of the three-loop structure and shell of the present invention. Figure 4 This is a perspective view of the shell structure of the present invention; Figure 5 This is a schematic diagram of the passive component structure of the present invention; Figure 6 This is a schematic diagram of the drive component structure of the present invention; Figure 7 This is a three-dimensional structural view of another embodiment of the present invention; Figure 8 This is a schematic diagram of another embodiment of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of another embodiment of the present invention. Figure 2 .

[0020] Numbering on the map: 1. Driving component; 2. Passive component; 3. Spring plate; 4. Three-loop wire; 5. External interface; 6. Display point; 7. Housing; 8. Groove; 11. First trapezoidal block; 12. Second trapezoidal block; 13. Blocking block; 14. Protrusion; 21. Connecting rod; 22. Raised block; 23. Fixing block; 24. Recessed rail; 31. Pad; 32. Connecting part; 33. Curved part; 71. Through hole. Detailed Implementation

[0021] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0022] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0023] like Figure 1-9 As shown, the present invention provides an electromagnetically driven Braille dot display structure, comprising: Housing 7 serves as the external support for the entire Braille display, providing installation space and protection for other internal components. Drive component 1 is made of magnetic conductor material; The passive component 2 is made of a non-magnetic material. It receives the displacement transmitted from the driving component 1 and moves itself to drive the display point 6 at the top to rise or fall, thereby changing the position of the display point 6 and forming different combinations of Braille raised dots. Spring plate 3 has an elastic restoring function; The three-loop line 4 has three external interfaces 5, and the location of electromagnetic field generation can be changed by controlling the voltage state of different interfaces. Display point 6 is located at the top of passive component 2. Display point 6 is the part of the Braille dot display that ultimately presents information. It rises or falls by moving passive component 2, forming a raised or recessed shape, which is touched and perceived by blind people so as to identify the corresponding Braille content. Among them, the three open-loop line 4 drives the driving component 1 to move through the electromagnetic field, and the driving component 1 drives the passive component 2 to move through mechanical linkage. When the state changes, the spring plate 3 locks the position of the passive component 2 to achieve low power consumption to maintain the display state.

[0024] In the embodiment, the driving component 1 includes a first trapezoidal block 11 and a second trapezoidal block 12. The first trapezoidal block 11 is flipped over and stacked on the front side of the second trapezoidal block 12 and fixedly connected to the second trapezoidal block 12.

[0025] In the embodiment, the passive component 2 includes a connecting rod 21, a protrusion 22, and a fixing block 23. The protrusion 22, which has a triangular cross-section, is located near both ends of the connecting rod 21, and the fixing block 23 is located at both ends of the connecting rod 21.

[0026] In this embodiment, a through hole 71 is provided in the middle of the housing 7, and the projection of the through hole 71 is consistent with the projection of the fixing block 23 of the passive component 2.

[0027] In this embodiment, a connecting portion 32 is provided in the middle of the spring sheet 3, and a curled portion 33 is provided at both ends of the connecting portion 32. A pad 31 is provided in the middle of the connecting portion 32, and the pad 31 is provided on the surface of the connecting portion 32 in the protruding direction of the curled portion 33.

[0028] See Figure 3 and Figure 4 After the driving component 1 and the passive component 2 are assembled, the first trapezoidal block 11 abuts against the connecting rod 21 and is limited by the protrusion 22. The slope of the protrusion 22 is consistent with the slope of the waist side of the first trapezoidal block 11. The driving component 1 moves or pushes the passive component 2 between the protrusions 22 through the magnetic field generated by the three open loop line 4.

[0029] See Figure 3After the driving component 1, the passive component 2, and the spring plate 3 are assembled, under normal conditions, the curled portion 33 at one end of the spring plate 3 abuts against the protrusion 22 on the passive component 2, thereby locking the position of the passive component 2 and ensuring that the display point 6 can be stably maintained in its current state, achieving low-power display maintenance. When the driving component 1 moves, the second trapezoidal block 12 pushes up the curled portion 33 of the spring plate 3, releasing the lock on the passive component 2, allowing the passive component 2 to move with the driving component 1. When the driving component 1 stops moving, the spring plate 3 returns to its original state, relocking the passive component 2.

[0030] See Figure 1 The electromagnetic field control method of the three open-loop line 4 is as follows: when the middle outer interface 5 is connected to the negative pole and the upper port is connected to the positive pole, an electric field is formed in the upper half; when the lower port is connected to the positive pole, an electric field is formed in the lower half. The electric field position change drives the drive component 1 to move. The precise change of the electric field position can drive the drive component 1 to move to a specific position, so that the passive component 2 connected to it and the display point 6 at the top can also accurately reach the preset height, ensuring that the shape and position of each Braille protrusion are accurate and in line with Braille standards, making it convenient for blind people to accurately touch and identify.

[0031] See Figure 3 and Figure 4 The linkage between the driving component 1 and the passive component 2 is as follows: the driving component 1 unlocks by pushing the spring plate 3 out through the upward inclined surface, which drives the passive component 2 to move upward; after the passive component 2 moves upward, the spring plate 3 returns to its original position and locks, thereby achieving stable display of the display point 6.

[0032] In another embodiment, the linkage between the driving component 1 and the passive component 2 can be achieved by the driving component 1 having a groove in the middle to clamp the passive component 2, the driving component 1 having a central opening to embed the passive component 2, or the driving component 1 being split into multiple parts to jointly complete the driving function.

[0033] A method for driving a Braille dot display includes the following steps: Step 1: Driving. Different interface voltage states are controlled through the three open-loop line 4. A specific voltage sequence is input to the three open-loop line 4 (three-phase coil) through the controller. Each phase coil corresponds to an independent driving interface. Phase A: Apply a positive pulse voltage (such as +12V) to generate a vertically upward magnetic field component. Phase B: Apply a reverse pulse voltage (such as -12V) to generate a vertically downward magnetic field component. Phase C: Maintain a zero voltage or low voltage state as a magnetic field balance reference point. The magnetic fields generated by the three open-loop line 4 are superimposed in space to form a gradient magnetic field distribution, which drives the driving component 1 to move. Step 2: Unlocking. The driving component 1 moves upward and pushes out the spring plate 3 through the upward inclined surface, unlocking the passive component 2 and causing the passive component 2 to move upward. The display point 6 displays the Braille dots. Step 3: Locking. After the passive component 2 moves upward a certain distance, the spring plate 3 returns to its original position and locks, maintaining the stable display state of the display point 6; Step 4: Retract, reverse drive the three open loop line 4, drive component 1 moves downward, push out the spring plate 3 through the downward slope of drive component 1, unlock passive component 2, drive passive component 2 to move downward, retract display point 6, the unlocking logic is symmetrical with step 2, ensuring that passive component 2 can move freely downward.

[0034] The electromagnetic field control method of the three open-loop line 4 is as follows: when the middle outer interface 5 is connected to the negative pole and the upper port is connected to the positive pole, an electric field is formed in the upper half; when the lower port is connected to the positive pole, an electric field is formed in the lower half, and the displacement of the driving component 1 is driven by the change of the electric field position.

[0035] See Figures 7 to 9 The main difference between this embodiment and the previous embodiment is that the passive component 2 and the spring plate 3 adopt an integrated structural design. The Braille dot display includes core components such as housing 7, driving component 1, passive component 2, spring plate 3, three open loop lines 4, and display dots 6.

[0036] The housing 7 serves as the external support structure for the entire device, providing installation space and protection for the internal components. The driving component 1 is made of magnetic conductor material, while the passive component 2 is made of non-magnetic material. It receives the displacement power transmitted by the driving component 1 and moves up and down to raise or lower the top display point 6, thereby changing the position of the display point 6 to form different combinations of Braille raised dots.

[0037] The spring plate 3 has an integrally molded elastic reset function. The three-loop wire 4 has three external interfaces 5, and the position of the electromagnetic field generation can be changed by controlling the voltage state of different interfaces. The display point 6 is located at the top of the passive component 2 and is the part of the Braille display that ultimately presents the information. It rises or falls by moving the passive component 2, forming a raised or recessed state for blind people to touch and perceive.

[0038] The working principle of the device is as follows: the three open loop line 4 drives the driving component 1 to generate displacement through the electromagnetic field, the driving component 1 drives the passive component 2 to move through mechanical linkage, and the spring plate 3 locks the position of the passive component 2 when the state changes, thereby achieving low power consumption to maintain the display state.

[0039] In terms of specific structure, two spring plates 3 are respectively provided on both sides of the passive component 2, with the openings of the two spring plates 3 facing the middle of the passive component 2, forming a hook-shaped structure. Two-section grooves 8 are provided at the upper and lower ends of the inner side of the housing 7. When the passive component 2 is pushed, the spring plates 3 can be inserted into the two-section grooves 8, and the hook-shaped structure of the spring plates 3 completes the self-locking function of sliding up and down.

[0040] In addition, the upper and lower ends of the driving component 1 are provided with blocking blocks 13 for retracting the spring sheet 3, and the three-loop wire 4 is sleeved on the outside of the driven component 2 and the driving component 1. When the driving component 1 moves, the blocking blocks 13 first contact the spring sheet 3, causing the spring sheet 3 to compress, thereby releasing the locked state.

[0041] Regarding the linkage mechanism, the surfaces of the passive component 2 and the driving component 1 that are in contact are respectively provided with a concave rail 24 and a protrusion 14. When the spring plate 3 is locked in contact, the driving component 1, together with the protrusion 14, exerts a pushing force on the top or end of the concave rail 24, causing the passive component 2 to protrude or recede, thereby causing the display point 6 set on the top of the passive component 2 to rise or fall, forming a raised or recessed state that can be perceived by the blind, thus recognizing the corresponding Braille content.

[0042] In the description of this invention, it should be understood that the terms "middle," "length," "upper," "lower," "front," "rear," "vertical," "horizontal," "inner," "outer," "radial," "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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 limitations on this invention.

[0043] In this invention, unless otherwise expressly specified and limited, the first feature "on" the second feature may be in direct contact with the first and second features, or indirect contact with the first and second features through an intermediate medium. "A plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] The above description is merely illustrative of the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made without creative effort within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A structure for an electromagnetically driven Braille dot display, characterized in that, include: case; The driving component is made of a magnetic conductor material; The passive component is made of a non-magnetic material; Spring sheet, with elastic restoring function; The three-loop line has three external interfaces, and the location of electromagnetic field generation can be changed by controlling the voltage state of different interfaces. The display point is located at the top of the passive component; Among them, the three open-loop lines drive the displacement of the driving component through the electromagnetic field, and the driving component drives the displacement of the passive component through mechanical linkage. When the state changes, the spring plate locks the position of the passive component, so as to maintain the display state with low power consumption.

2. The electromagnetic drive Braille dot display structure according to claim 1, characterized in that: The driving component includes a first trapezoidal block and a second trapezoidal block, wherein the first trapezoidal block is flipped over and stacked on the front side of the second trapezoidal block and fixedly connected to the second trapezoidal block.

3. The structure of an electromagnetically driven Braille dot display according to claim 1, characterized in that: The passive component includes a connecting rod, a protrusion, and a fixing block. The protrusion, with a triangular cross-section, is located near both ends of the connecting rod, and the fixing block is located at both ends of the connecting rod. Two spring plates are respectively provided on both sides of the passive component. The openings of the two spring plates face the center of the passive component, forming a barb-shaped structure. Two-section grooves are provided at the upper and lower ends of the inner side of the housing. When the passive component is pushed, the spring plates are engaged in the two-section grooves, and the barb-shaped structure of the spring plates completes the self-locking of the up-and-down sliding motion. The surface where the passive component and the driving component contact is provided with a recessed rail.

4. The structure of an electromagnetically driven Braille dot display according to claim 1, characterized in that: A through hole is provided in the middle of the housing, and the projection of the through hole is consistent with the projection of the fixing block of the passive component.

5. The structure of an electromagnetically driven Braille dot display according to claim 1, characterized in that: The spring sheet has a connecting part in the middle, and the two ends of the connecting part have curled parts. The connecting part has a pad in the middle, and the pad is placed on the surface of the connecting part in the protruding direction of the curled part. The driving member has blocking blocks at the upper and lower ends for retracting the spring sheet. When the driving member moves, the blocking blocks first contact the spring sheet, and then the spring sheet is compressed, thereby releasing the locking state of the driven member.

6. The structure of an electromagnetically driven Braille dot display according to claim 1, characterized in that: The electromagnetic field control method of the three open-loop line is as follows: when the middle outer interface is connected to the negative pole and the upper interface is connected to the positive pole, an electric field is formed in the upper half; when the lower interface is connected to the positive pole, an electric field is formed in the lower half, and the displacement of the driving component is driven by the change of the electric field position.

7. The structure of an electromagnetically driven Braille dot display according to claim 1 or 2, characterized in that: The linkage between the driving component and the passive component is as follows: the driving component unlocks by pushing out the spring plate through the upward inclined surface, causing the passive component to move upward; after the passive component moves upward, the spring plate returns to its original position and locks, achieving stable display of the display point; or, when the driving component moves, the blocking blocks at its upper and lower ends first contact the spring plate, causing the spring plate to compress and unlock. After the spring plate contacts the lock, the driving component, together with the protrusions on it, exerts a pushing force on the top or end of the concave rail on the passive component, causing the passive component to protrude or dent, thereby causing the display point set on the top of the passive component to rise or fall, forming a protrusion or dent.

8. The structure of an electromagnetically driven Braille dot display according to claim 1, characterized in that: The linkage between the driving component and the passive component is not limited to overlapping protrusions. It can be achieved by having a groove in the middle of the driving component to clamp the passive component, embedding the passive component in the central opening of the driving component, or splitting it into multiple components to jointly complete the driving function.

9. The structure of an electromagnetically driven Braille dot display according to claim 7, characterized in that: The drive component is provided with protrusions.

10. A method for driving a Braille dot display, characterized in that, Includes the following steps: Step 1: Driving, by controlling the voltage state of different interfaces through three open loop lines, the position of electromagnetic field generation is changed, which drives the displacement of the driving component; Step 2: Unlocking. The driving component moves upward and pushes out the spring plate through the upward inclined surface, unlocking the passive component and causing it to move upward, displaying Braille dots. Step 3: Locking. After the passive component moves upward a certain distance, the spring plate returns to its original position and locks, maintaining a stable display state of the display point; Step 4: Retract, reverse the three-loop drive, the drive component moves downward, pushes out the spring plate through the downward inclined surface, unlocks the passive component, drives the passive component to move downward, and retracts the display point.

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