Braille display module and Braille display
By using a rotary output mechanism and cam structure to drive the top rod sliding in a Braille display, the problems of electromagnetic interference, complex structure and unstable locking are solved, and higher reliability and stability are achieved.
Patent Information
- Application Number
- CN202510085919.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-04-11
AI Technical Summary
In existing Braille displays, electromagnetic drive devices have problems such as electromagnetic interference, complex structure and high maintenance costs, and unstable locking mechanisms.
The rotational output mechanism and cam structure are used to drive the sliding of the top rod, and the rotational motion is converted into linear motion through the cam structure, avoiding electromagnetic drive, simplifying the structure, and accurately locking the top rod through the limiting block and the guide arc section.
It solves the problem of electromagnetic interference, reduces manufacturing and assembly costs, improves the reliability and stability of the device, and realizes accurate expansion and locking of the pin.
Smart Images
Figure CN119811180A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of Braille display, and in particular to a Braille display module and a Braille display. Background Art
[0002] The main function of a Braille display is to convert text information in computers and other devices into Braille, using a combination of raised or sunken Braille characters to represent different characters or symbols. Blind people obtain information by touching these Braille characters.
[0003] The existing driving device of the braille display adopts the electromagnetic driving principle. However, there are three problems in the braille display device using the electromagnetic driving principle:
[0004] 1. Electromagnetic interference problem: When the Braille dot pitch is small, the electromagnetically driven Braille dot display unit is prone to magnetic interference, which will affect the rising height, strength and reliability of the bumps, and requires continuous power supply, further exacerbating electromagnetic interference.
[0005] 2. Complex structure and high maintenance cost: The electromagnetically driven Braille display device has a complex structure and contains multiple finely matched parts, which leads to complex manufacturing processes and high processing precision requirements, increasing production costs. At the same time, it is difficult to assemble and requires professional equipment and technicians, which increases labor costs and production cycle costs, making the product price higher and limiting market popularity. Later maintenance and repair are also difficult.
[0006] 3. Problems with the locking mechanism: In order to keep the protrusion in the extended state, continuous power supply is required, which not only consumes a lot of power, but also due to electromagnetic interference, the stability of the protrusion is difficult to ensure, and it is easy to have inconsistent heights or fall back. Summary of the invention
[0007] In view of this, the present application provides a braille display module and a braille display, which solve the problems in the prior art, simplify the structure of the braille display device and avoid electromagnetic interference of the braille display.
[0008] On the one hand, a Braille display module provided in the present application adopts the following technical solution:
[0009] A braille display module comprises a display unit, wherein the display unit comprises a top rod and a driving device;
[0010] The driving device comprises a rotary output mechanism and a cam structure, wherein the rotary output mechanism has a rotating output shaft, the cam structure is fixedly connected to the output shaft of the rotary output mechanism, the rotary output mechanism drives the cam structure to rotate, the cam structure comprises a distal end and a proximal end, the distance between the distal end and the rotation axis of the cam structure in the radial direction of the output shaft is a first distance, the distance between the proximal end and the rotation axis of the cam structure in the radial direction of the output shaft is a first distance, and the first distance is greater than the second distance;
[0011] One end of the push rod abuts against the outer peripheral surface of the cam structure, and the cam structure rotates to make the distal end or the proximal end abut against the push rod, so that the push rod slides along the first direction.
[0012] Optionally, a rotating disk is mounted on the output shaft, the cam structure is mounted on the rotating disk, a limit block and a guide arc segment are provided on the rotating disk, when the end of the push rod abuts against the proximal end, the side of the push rod abuts against the limit block, one end of the guide arc segment is connected to one side of the cam structure, and the other end of the guide arc segment extends to the limit block;
[0013] The circumferential profile of the guide arc segment includes a transition curve, one end of the transition curve is transitionally connected to the distal end, the other end of the transition curve extends to the stop block, the proximal end is located on the concave side of the transition curve, and the radial distance between the end of the transition curve extending to the stop block and the output shaft axis is greater than the second distance;
[0014] The rotation of the turntable drives the cam structure and the guide arc segment to rotate, so that the push rod passes through the outer peripheral surface of the proximal end, the outer peripheral surface of the distal end and the transition curve, and moves between a position abutting the proximal end and a side surface of the limit block and a position abutting the transition curve and the other side surface of the limit block.
[0015] Optionally, the transition curve is an arc line, and a radial distance from one end of the transition curve close to the limit block to the axis of the output shaft is greater than or equal to a first distance.
[0016] Optionally, when the push rod abuts the proximal end and the limit block, the contact point between the push rod end and the proximal end and the first radial line connecting the axis of the output shaft are parallel to the first direction; the push rod abuts the transition curve and the limit block, the contact point between the push rod end and the transition curve and the second radial line connecting the axis of the output shaft are parallel to the first direction, and the first radial line, the second radial line and the center line of the push rod along the length direction coincide.
[0017] Optionally, a straight line passing through the axis of the output shaft and parallel to the sliding direction of the push rod is a first straight line, and when the push rod abuts against the proximal end and the limit block, the contact point between the push rod end and the proximal end is located on the side of the first straight line facing away from the limit block, and when the push rod abuts against the transition curve and the limit block, the contact point between the push rod end and the transition curve is located on the side of the first straight line facing away from the limit block.
[0018] Optionally, the Braille display module also includes a shell, on which a plurality of display units are mounted, and the shell is provided with a plurality of spaced-apart accommodating spaces, the accommodating spaces including a first channel and a second channel that are interconnected, the push rod slides in the first channel, the rotation output mechanism is located in the second channel, the cam structure is located at the intersection of the first channel and the second channel, the length directions of the first channel and the second channel are perpendicular to each other, the axial direction of the output shaft is parallel to the length direction of the second channel, and an end of the first channel away from the second channel is connected to the outside world for allowing the end of the push rod away from the cam structure to extend out of the shell.
[0019] Optionally, an outer protrusion is provided on the side wall of the end of the push rod away from the cam structure, and the outer protrusion is located in the first channel. An inner protrusion is provided on the inner wall of the end of the first channel away from the second channel, and the inner protrusion is located on the side of the outer protrusion away from the second channel. A spring is provided between the outer protrusion and the inner protrusion and is sleeved on the outer periphery of the push rod. The spring is used to apply a force to the outer protrusion away from the inner protrusion.
[0020] Optionally, the housing includes a base and an upper cover, the second channel is located in the base, a hole communicating with the second channel is provided on the base, a through hole corresponding to the hole is provided on the upper cover, and the hole and the through hole constitute the first channel;
[0021] The push rod includes a telescopic rod and a contact, one end of the telescopic rod is in contact with the cam structure, the other end of the telescopic rod extends into the through hole and is connected to the contact, the contact is at least partially located in the through hole, the contact and the telescopic rod are detachably connected, the outer protrusion is arranged on the outer periphery of the contact, and the inner protrusion is arranged at one end of the through hole away from the channel.
[0022] On the other hand, the present application provides a braille display using the following technical solution:
[0023] A braille display comprises the braille display module mentioned above.
[0024] In summary, this application includes the following beneficial technical effects:
[0025] The cam structure of the present application converts the rotational motion of the rotary output mechanism into linear motion of the driving push rod along the first direction. Electromagnetic drive is not adopted, so the electromagnetic interference problem is solved and electromagnetic interference between adjacent Braille display units is avoided. At the same time, the use of motor drive makes the device structure simple, the number of parts is small, the manufacturing and assembly costs are reduced, and the reliability is greatly improved.
[0026] By setting the limit block and the guide arc segment, the push rod is blocked on the rotary output mechanism after it is in place, ensuring the accuracy of the push rod in place. At the same time, when the turntable rotates to make the far end of the cam structure contact the push rod and the near end contact the push rod, the push rod can be quickly retracted under the action of the spring. When the push rod abuts the limit block, the push rod abuts the position of the near end and the push rod abuts the guide arc segment, so that the push rod has a force on the cam or the guide arc segment, avoiding the turntable from rotating at will after the rotary drive mechanism is powered off, and realizing the locking of the push rod after it is in place.
[0027] The Braille display device of this application provides visually impaired people with a more complete way to obtain information, and improves their travel convenience and sense of participation and security. It promotes the process of barrier-free public facilities, allowing visually impaired people to live more freely, conveniently and harmoniously in public spaces. It provides more reading possibilities for the blind, helping them to better integrate into social life and learning. It allows visually impaired people to use and operate various facilities and home appliances more conveniently, improving their independence and autonomy. It helps to promote social accessibility and inclusiveness, create a more friendly and barrier-free environment for visually impaired people, and enhance their participation and sense of integration. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0029] Figure 1 This is a schematic diagram of the overall appearance structure of the Braille display module of this application;
[0030] Figure 2 A cross-sectional view of the braille display module of the present application;
[0031] Figure 3 A cross-sectional view of the braille display module of the present application in another direction;
[0032] Figure 4 This is a schematic diagram of the positional relationship between the driving device and the ejector rod when the ejector rod is in different telescopic states of the present application;
[0033] Figure 5This is a schematic diagram of the exploded structure of the Braille display module of this application.
[0034] Explanation of the accompanying drawings: 1. Shell; 11. Base; 12. Upper cover; 2. Display unit; 3. Push rod; 31. Telescopic rod; 32. Contact; 33. External protrusion; 34. Internal protrusion; 35. Spring; 4. Driving device; 41. Rotary output mechanism; 42. Output shaft; 43. Turntable; 44. Cam structure; 45. Distal end; 46. Proximal end; 47. Limit block; 48. Guide arc segment; 49. Transition curve; 5. First channel; 51. Hole; 52. Through hole; 6. Second channel. DETAILED DESCRIPTION
[0035] The embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0036] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.
[0037] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.
[0038] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.
[0039] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.
[0040] An embodiment of the present application provides a Braille display module.
[0041] like Figures 1 to 5 As shown, a Braille display module includes a display unit 2, and the display unit 2 includes a top rod 3 and a driving device 4.
[0042] like Figure 2 and Figure 3 As shown, the driving device 4 includes a rotating output mechanism 41 and a cam structure 44, the rotating output mechanism 41 has a rotating output shaft 42, the cam structure 44 is fixedly connected to the output shaft 42 of the rotating output mechanism 41, the rotating output mechanism 41 drives the cam structure 44 to rotate, the cam structure 44 includes a distal end 45 and a proximal end 46, the distance between the distal end 45 and the rotation axis of the cam structure 44 in the radial direction of the output shaft 42 is a first distance, the distance between the proximal end 46 and the rotation axis of the cam structure 44 in the radial direction of the output shaft 42 is a first distance, and the first distance is greater than the second distance; one end of the push rod 3 abuts against the outer peripheral surface of the cam structure 44, and the rotation of the cam structure 44 causes the distal end 45 or the proximal end 46 to abut against the push rod 3, so that the push rod 3 slides along the first direction. In one embodiment, the rotating output mechanism 41 is a motor, and the motor can be a micro motor.
[0043] The present application drives the cam structure 44 to rotate the wheel through a rotating output mechanism 41. When the distal end 45 of the cam structure 44 abuts against the push rod 3, the push rod 3 is in an extended state. When the proximal end 46 of the cam abuts against the push rod 3, the push rod 3 is in a retracted state. Braille is represented by different telescopic states of the push rods 3 arranged in a plurality of arrays. The setting of the cam structure 44 converts the rotational motion of the rotational output mechanism 41 into a linear motion that drives the push rod 3 along a first direction.
[0044] like Figure 3 and Figure 4 As shown, a rotating disk 43 is mounted on the output shaft 42, the cam structure 44 is mounted on the rotating disk 43, a stop block 47 and a guide arc segment 48 are provided on the rotating disk 43, when the end of the push rod 3 abuts against the proximal end 46, the side of the push rod 3 abuts against the stop block 47, one end of the guide arc segment 48 is connected to one side of the cam structure 44, and the other end of the guide arc segment 48 extends to the stop block 47. The guide arc segment 48 is connected to one side of the cam structure 44 close to the stop block 47.
[0045] The circumferential profile of the guiding arc segment 48 includes a transition curve 49, one end of the transition curve 49 is transitionally connected to the distal end 45, the other end of the transition curve 49 extends to the limit block 47, the proximal end 46 is located on the concave side of the transition curve 49, and the radial distance between the end of the transition curve 49 extending to the limit block 47 and the axis of the output shaft 42 is greater than the second distance.
[0046] The rotation of the turntable 43 drives the cam structure 44 and the guide arc segment 48 to rotate, so that the push rod 3 passes through the outer circumference of the proximal end 46, the outer circumference of the distal end 45 and the transition curve 49, and moves between a position abutting the proximal end 46 and abutting one side of the limit block 47 and a position abutting the transition curve 49 and abutting the other side of the limit block 47.
[0047] The braille display module comprises a shell 1 , on which a slideway is provided for a push rod 3 to slide. The push rod 3 slides in the slideway along a first direction. The setting of the slideway limits the displacement of the push rod 3 in other directions.
[0048] like Figure 4 As shown, during the rotation of the turntable 43, when the push rod 3 contacts the distal end 45 to the proximal end 46, when the push rod 3 abuts against the proximal end 46 of the cam structure 44, as shown in FIG. Figure 4 As shown in Figure a, the push rod 3 is in a retracted state and one side of the limit block 47 abuts against the side wall of the push rod 3, the push rod 3 limits the continued rotation of the limit block 47, and when the proximal end 46 of the cam structure 44 abuts against the push rod 3, the abutment between the push rod 3 and the limit block 47 limits the rotation of the output shaft 42, thereby achieving the effect of blocking rotation, that is, when the rotary output mechanism 41 drives the cam structure 44 to rotate until the push rod 3 is in a retracted state, the push rod 3 blocks the rotary output mechanism 41, and then the rotary output mechanism 41 is powered off, so that the cam stops rotating after the push rod 3 is in place, thereby achieving the accurate retraction of the control push rod 3.
[0049] During the rotation of the turntable 43, Figure 4 As shown in Figure c, after the push rod 3 moves from the contact proximal end 46 to the distal end 45, the turntable 43 continues to rotate. Figure 4As shown in FIG. 4 , until the other side of the limit block 47 abuts against the side wall of the push rod 3, during the process in which the turntable 43 rotates to make the distal end 45 of the cam contact the push rod 3 until the end of the transition curve 49 away from the distal end 45 contacts the push rod 3, the push rod 3 and the curved surface contact to ensure the stable sliding of the push rod 3 and the guide arc segment 48, and the convex surface of the transition curve 49 contacts the push rod 3 and ensures that the push rod 3 will not retract, and the radial distance between the end of the transition curve 49 away from the distal end 45 and the axis of the output shaft 42 is greater than the second distance, that is, when the push rod 3 contacts the end of the transition curve away from the distal end 45, the push rod 3 is still in the extended state, and at the same time, the limit block 47 abuts against the push rod 3, the push rod 3 blocks the rotation of the rotation output mechanism 41, and then the rotation output mechanism 41 is powered off, so that the turntable 43 stops rotating after the push rod 3 is in place, thereby realizing the accurate extension of the control push rod 3.
[0050] In the embodiment of the present application, the rotation output mechanism 41 is blocked when the push rod 3 is in the extended state and the retracted state by a limit block 47, which reduces the volume of the structure while achieving the push rod 3 to accurately stop in the extended state and the retracted state, which is conducive to the miniaturized design of the Braille display module.
[0051] The transition curve 49 is an arc line, and the radial distance between the end of the transition curve 49 close to the stop block 47 and the axis of the output shaft 42 is greater than or equal to the first distance. The arc-shaped transition curve 49 ensures smooth sliding of the push rod 3 and the transition curve 49 from the far end 45 contacting the push rod 3 to the other end of the transition curve 49 contacting the push rod 3.
[0052] Regarding how to ensure that the push rod 3 is in the extended or retracted state and the rotary output mechanism 41 is powered off, the technical solutions for how to keep the push rod 3 in the extended or retracted state more stably are as follows:
[0053] In one embodiment, when the push rod 3 abuts the proximal end 46 and the stop block 47, the first radial line connecting the abutting point between the end of the push rod 3 and the proximal end 46 and the axis of the output shaft 42 is parallel to the first direction; when the push rod 3 abuts the transition curve 49 and the stop block 47, the abutting point between the end of the push rod 3 and the transition curve 49 and the second radial line connecting the axis of the output shaft 42 are parallel to the first direction, and the first radial line, the second radial line and the center line of the push rod 3 along the length direction coincide. When the push rod 3 is in the extended state and the retracted state, the force of the push rod 3 on the cam structure 44 or the guide arc segment 48 is along the radial direction of the output shaft 42, which can prevent the situation where the force of the push rod 3 causes the output shaft 42 to rotate randomly after a person touches the push rod 3, thereby improving the stability of the push rod 3 in the extended state and the retracted state. A contact plane may also be provided at the proximal end 46 by providing a guide arc segment 48 , and when the limit block 47 and the ejector rod 3 abut against each other, the contact plane and the end surface of the ejector rod 3 are in contact, so as to further improve the stability of the ejector rod 3 .
[0054] In another embodiment, a straight line passing through the axis of the output shaft 42 and parallel to the sliding direction of the push rod 3 is a first straight line, and when the push rod 3 abuts against the proximal end 46 and the stop block 47, the contact point between the end of the push rod 3 and the proximal end 46 is located on the side of the first straight line facing away from the stop block 47, and when the push rod 3 abuts against the transition curve 49 and the stop block 47, the contact point between the end of the push rod 3 and the transition curve 49 is located on the side of the first straight line facing away from the stop block 47. The force of the push rod 3 on the cam or the guide arc segment 48 deviates from the side of the stop block 47, so that the rotating disk 43 has the force to drive the stop block 47 to continue to approach the push rod 3, but due to the limiting effect of the push rod 3, the rotating disk 43 cannot continue to rotate, so that the push rod 3 can be stably maintained in the extended or retracted state.
[0055] like Figure 1 , Figure 2 and Figure 5 As shown, a plurality of display units 2 are mounted on the housing 1, and a plurality of spaced accommodation spaces are provided in the housing 1, and the accommodation spaces include a first channel 5 and a second channel 6 which are interconnected, and the push rod 3 slides in the first channel 5, and the first channel 5 here corresponds to the above-mentioned slideway; the rotation output mechanism 41 is located in the second channel 6, and the cam structure 44 is located at the intersection of the first channel 5 and the second channel 6, and the length directions of the first channel 5 and the second channel 6 are perpendicular to each other, and the axial direction of the output shaft 42 is parallel to the length direction of the second channel 6, and the end of the first channel 5 away from the second channel 6 is connected to the outside to allow the end of the push rod 3 away from the cam structure 44 to extend out of the housing 1. The length direction of the push rod 3 is perpendicular to the length direction of the output shaft 42, which can reduce the thickness and volume of the entire braille display module.
[0056] like Figure 3 As shown, an outer protrusion 33 is provided on the side wall of the end of the push rod 3 away from the cam structure 44, and the outer protrusion 33 is located in the first channel 5. An inner protrusion 34 is provided on the inner wall of the end of the first channel 5 away from the second channel 6, and the inner protrusion 34 is located on the side of the outer protrusion 33 away from the second channel 6. A spring 35 is provided between the outer protrusion 33 and the inner protrusion 34 and is sleeved on the outer periphery of the push rod 3. The spring 35 is used for the outer protrusion 33 to exert a force away from the inner protrusion 34. When the turntable 43 rotates to make the far end 45 of the cam structure 44 contact the push rod 3 and the proximal end 46 contact the push rod 3, the push rod 3 can be quickly retracted under the force of the spring 35. In combination with the position of the push rod 3 against the proximal end 46 when the push rod 3 abuts the limit block 47 and the position of the push rod 3 against the guide arc segment 48, the push rod 3 has a force on the cam or the guide arc segment 48, so as to prevent the turntable 43 from rotating at will after the rotary drive mechanism is powered off.
[0057] The housing 1 includes a base 11 and an upper cover 12. The second channel 6 is located in the base 11. The base 11 is provided with a hole 51 connected to the second channel 6. The upper cover 12 is provided with a through hole 52 corresponding to the hole 51. The hole 51 and the through hole 52 constitute the first channel 5. The top rod 3 includes a telescopic rod 31 and a contact 32. One end of the telescopic rod 31 abuts against the cam structure 44. The other end of the telescopic rod 31 extends into the through hole 52 and is connected to the contact 32. The contact 32 is at least partially located in the through hole 52. The contact 32 and the telescopic rod 31 are detachably connected. The outer protrusion 33 is arranged on the outer periphery of the contact 32. The inner protrusion 34 is arranged at one end of the through hole 52 away from the hole 51. The housing 1 is divided into a base 11 and an upper cover 12, which is convenient for installing the telescopic rod 31 and the contact 32. The contact 32 is a columnar structure for the blind to touch.
[0058] The embodiment of the present application also discloses a Braille display.
[0059] A braille display comprises the braille display module mentioned above.
[0060] The braille display further comprises a mounting seat and a circuit board. The braille display module and the circuit board are both mounted on the mounting seat, and the circuit board is electrically connected to the power supply end of the rotation output mechanism 41 by contact.
[0061] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.
Claims
1. A Braille display module, characterized in that: It comprises a display unit (2), wherein the display unit (2) comprises a top rod (3) and a driving device (4); The driving device (4) comprises a rotary output mechanism (41) and a cam structure (44); the rotary output mechanism (41) has a rotatable output shaft (42); the cam structure (44) and the output shaft (42) of the rotary output mechanism (41) are fixedly connected; the rotary output mechanism (41) drives the cam structure (44) to rotate; the cam structure (44) comprises a distal end (45) and a proximal end (46); the distance between the distal end (45) and the rotation axis of the cam structure (44) in the radial direction of the output shaft (42) is a first distance; the distance between the proximal end (46) and the rotation axis of the cam structure (44) in the radial direction of the output shaft (42) is a first distance; and the first distance is greater than the second distance; One end of the push rod (3) abuts against the outer peripheral surface of the cam structure (44), and the cam structure (44) rotates to make the distal end (45) or the proximal end (46) abut against the push rod (3), so that the push rod (3) slides along the first direction.
2. The Braille display module according to claim 1, characterized in that: A rotating disk (43) is mounted on the output shaft (42), the cam structure (44) is mounted on the rotating disk (43), a limit block (47) and a guide arc segment (48) are provided on the rotating disk (43), when the end of the push rod (3) abuts against the proximal end (46), the side of the push rod (3) abuts against the limit block (47), one end of the guide arc segment (48) is connected to one side of the cam structure (44), and the other end of the guide arc segment (48) extends to the limit block (47); The circumferential profile of the guide arc segment (48) includes a transition curve (49), one end of the transition curve (49) is transitionally connected to the distal end (45), the other end of the transition curve (49) extends to the limit block (47), the proximal end (46) is located on the concave side of the transition curve (49), and the radial distance between the end of the transition curve (49) extending to the limit block (47) and the axis of the output shaft (42) is greater than the second distance; The rotation of the rotating disk (43) drives the cam structure (44) and the guide arc segment (48) to rotate, so that the push rod (3) passes through the outer peripheral surface of the proximal end (46), the outer peripheral surface of the distal end (45) and the transition curve (49), and moves between a position abutting the proximal end (46) and abutting one side of the limit block (47) and a position abutting the transition curve (49) and abutting the other side of the limit block (47).
3. The Braille display module according to claim 2, characterized in that: The transition curve (49) is an arc line, and the radial distance from one end of the transition curve (49) close to the limit block (47) to the axis of the output shaft (42) is greater than or equal to the first distance.
4. The Braille display module according to claim 2, characterized in that: When the push rod (3) abuts against the proximal end (46) and the limit block (47), a first radial line connecting the abutting point between the end of the push rod (3) and the proximal end (46) and the axis of the output shaft (42) is parallel to the first direction; when the push rod (3) abuts against the transition curve (49) and the limit block (47), a second radial line connecting the abutting point between the end of the push rod (3) and the transition curve (49) and the axis of the output shaft (42) is parallel to the first direction, and the first radial line, the second radial line and the center line of the push rod (3) along the length direction coincide.
5. The Braille display module according to claim 2, characterized in that: A straight line passing through the axis of the output shaft (42) and parallel to the sliding direction of the push rod (3) is a first straight line; when the push rod (3) abuts against the proximal end (46) and abuts against the limit block (47), the abutment point between the end of the push rod (3) and the proximal end (46) is located on the side of the first straight line facing away from the limit block (47); when the push rod (3) abuts against the transition curve (49) and abuts against the limit block (47), the abutment point between the end of the push rod (3) and the transition curve (49) is located on the side of the first straight line facing away from the limit block (47).
6. The Braille display module according to any one of claims 1 to 5, characterized in that: The braille display module further comprises a shell (1), on which a plurality of display units (2) are mounted, and a plurality of spaced accommodation spaces are arranged inside the shell (1), wherein the accommodation spaces comprise a first channel (5) and a second channel (6) which are connected to each other, wherein the push rod (3) slides in the first channel (5), the rotation output mechanism (41) is located in the second channel (6), the cam structure (44) is located at the intersection of the first channel (5) and the second channel (6), the length directions of the first channel (5) and the second channel (6) are perpendicular to each other, the axial direction of the output shaft (42) is parallel to the length direction of the second channel (6), and the end of the first channel (5) away from the second channel (6) is connected to the outside to allow the end of the push rod (3) away from the cam structure (44) to extend out of the shell (1).
7. The Braille display module according to claim 6, characterized in that: An outer protrusion (33) is provided on the side wall of one end of the push rod (3) away from the cam structure (44), and the outer protrusion (33) is located in the first channel (5). An inner protrusion (34) is provided on the inner wall of one end of the first channel (5) away from the second channel (6), and the inner protrusion (34) is located on the side of the outer protrusion (33) away from the second channel (6). A spring (35) is provided between the outer protrusion (33) and the inner protrusion (34) and is sleeved on the outer periphery of the push rod (3), and the spring (35) is used to apply a force to the outer protrusion (33) to move away from the inner protrusion (34).
8. The braille display module according to claim 7, characterized in that: The housing (1) comprises a base (11) and an upper cover (12); the second channel (6) is located in the base (11); a hole (51) communicating with the second channel (6) is provided on the base (11); a through hole (52) corresponding to the hole (51) is provided on the upper cover (12); the hole (51) and the through hole (52) constitute a first channel (5); The push rod (3) comprises a telescopic rod (31) and a contact (32); one end of the telescopic rod (31) is in contact with the cam structure (44); the other end of the telescopic rod (31) extends into the through hole (52) and is connected to the contact (32); the contact (32) is at least partially located in the through hole (52); the contact (32) and the telescopic rod (31) are detachably connected; the outer protrusion (33) is arranged on the outer periphery of the contact (32); and the inner protrusion (34) is arranged at one end of the through hole (52) away from the channel (51).
9. A braille display, characterized in that: It comprises a Braille display module as described in any one of claims 1-8.