Braille display module and Braille display

Abstract

The utility model provides a braille display module and a braille displayer, and belongs to the technical field of braille display, and the braille display module specifically comprises a display unit which comprises an ejector rod and a driving device; the driving device comprises a rotary output mechanism and a cam structure, the rotary output mechanism is provided with a rotary output shaft, the cam structure is fixedly connected with the output shaft of the rotary output mechanism, the rotary output mechanism drives the cam structure to rotate, and the cam structure comprises a far end and a near end; the distance between the far end and the rotating axis of the cam structure in the radial direction of the output shaft is a first distance, the distance between the near end and the rotating axis of the cam structure in the radial direction of the output shaft is a first distance, and the first distance is larger than the second distance. One end of the ejector rod abuts against the peripheral face of the cam structure, and the cam structure rotates to enable the far end or the near end to abut against the ejector rod so that the ejector rod can slide in the first direction. According to the processing scheme, the structure of the Braille display device is simplified, and electromagnetic interference of the Braille display is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of Braille display, in particular to a Braille display module and a Braille display. BACKGROUND

[0002] The main function of the Braille display is to convert the text information in the computer and other devices into Braille, and different characters or symbols are represented by the combination of convex or concave dots, and the blind people can obtain information by touching these dots.

[0003] The existing driving device of the Braille display adopts electromagnetic driving principle, but there are three problems in the Braille display device using electromagnetic driving principle:

[0004] 1. Electromagnetic interference problem: In the case of small Braille dot distance, the Braille dot display unit driven by electromagnetic is easy to produce magnetic interference, which will affect the rising height, strength and reliability of the convex dot, and needs continuous power supply, which further aggravates the electromagnetic interference.

[0005] 2. Complex structure and high maintenance cost: The Braille display device driven by electromagnetic has complex structure, which contains many finely matched components, which leads to complex manufacturing process, high processing precision requirement, increases the production cost. At the same time, the assembly difficulty is big, needs professional equipment and technical personnel, increases the labor cost and production cycle cost, makes the product price higher, limits the market popularization. The difficulty of later maintenance and repair is also big.

[0006] 3. Problem of locking mechanism: In order to keep the convex dot in the state of stretching out, continuous power supply is needed, which not only consumes large amount of electricity, but also due to electromagnetic interference, the stability of the convex dot is difficult to guarantee, and the inconsistent height or backfall situation is easy to appear. CONTENT OF THE INVENTION

[0007] Therefore, the present application provides a Braille display module and a Braille display, which solves the problems in the prior art, simplifies the structure of the Braille display device and avoids the electromagnetic interference of the Braille display.

[0008] On the one hand, the Braille display module provided by the present application adopts the following technical scheme:

[0009] A Braille display module, comprising a display unit, the display unit comprising a top rod and a driving device;

[0010] The driving device comprises a rotating output mechanism and a cam structure, the rotating output mechanism has a rotating output shaft, the cam structure is fixedly connected with the output shaft of the rotating output mechanism, the rotating 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 second distance, and the first distance is greater than the second distance.

[0011] One end of the ejector rod abuts against the outer circumferential surface of the cam structure, and the rotation of the cam structure causes the distal end or the proximal end to abut against the ejector rod, so that the ejector rod slides in the first direction.

[0012] Optionally, a rotating disc is mounted on the output shaft, the cam structure is mounted on the rotating disc, a limiting block and a guide arc segment are arranged on the rotating disc, the side of the ejector rod abuts against the limiting block when the end of the ejector rod abuts against the proximal end, one end of the guide arc segment is connected with one side of the cam structure, and the other end of the guide arc segment extends to the limiting block.

[0013] The circumferential contour of the guide arc segment comprises a transition curve, one end of the transition curve is transitionally connected with the distal end, the other end of the transition curve extends to the limiting block, the proximal end is located on one side of the concave surface of the transition curve, and the radial distance between the one end of the transition curve extending to the limiting block and the output shaft axis is greater than the second distance.

[0014] The rotation of the rotating disc drives the cam structure and the guide arc segment to rotate, so that the ejector rod moves between the position where the ejector rod abuts against the proximal end and the side surface of the limiting block and the position where the ejector rod abuts against the transition curve and the other side surface of the limiting block, and passes through the outer circumferential surface of the proximal end, the outer circumferential surface of the distal end and the transition curve.

[0015] Optionally, the transition curve is a circular arc, and the radial distance between the one end of the transition curve close to the limiting block and the output shaft axis is greater than or equal to the first distance.

[0016] Optionally, when the ejector rod abuts against the proximal end and the limiting block, the abutting point of the end of the ejector rod and the proximal end and the first radial line of the output shaft axis are parallel to the first direction; when the ejector rod abuts against the transition curve and the limiting block, the abutting point of the end of the ejector rod and the transition curve and the second radial line of the output shaft axis are parallel to the first direction, and the first radial line, the second radial line and the center line of the ejector rod in 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 ejector rod is a first straight line, the contact points between the end of the ejector rod and the proximal end when the ejector rod abuts the proximal end and the limiting block are located on one side of the first straight line away from the limiting block, and the contact points between the end of the ejector rod and the transition curve when the ejector rod abuts the transition curve and the limiting block are located on one side of the first straight line away from the limiting block.

[0018] Optionally, the Braille display module further comprises a housing, a plurality of display units are mounted on the housing, a plurality of accommodating spaces are arranged in the housing, the accommodating spaces comprise a first channel and a second channel which are in communication with each other, the ejector rod slides in the first channel, the rotating 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 axis direction of the output shaft is parallel to the length direction of the second channel, and one end of the first channel away from the second channel is in communication with the outside for the ejector rod to extend out of the housing from one end away from the cam structure.

[0019] Optionally, an outer protrusion is arranged on the side wall of the one end of the ejector rod away from the cam structure, the outer protrusion is located in the first channel, an inner protrusion is arranged on the inner wall of one end of the first channel away from the second channel, the inner protrusion is located on the side of the outer protrusion away from the second channel, and a spring is arranged between the outer protrusion and the inner protrusion and around the outer periphery of the ejector rod, the spring is used to apply a force away from the inner protrusion to the outer protrusion.

[0020] Optionally, the housing comprises a base and an upper cover, the second channel is located in the base, a hole is arranged on the base and in communication with the second channel, a through hole corresponding to the hole is arranged on the upper cover, and the hole and the through hole constitute the first channel.

[0021] The ejector rod comprises a telescopic rod and a contact point, one end of the telescopic rod abuts the cam structure, the other end of the telescopic rod extends into the through hole and is connected with the contact point, the contact point is at least partially located in the through hole, the contact point and the telescopic rod are detachably connected, the outer protrusion is arranged on the outer periphery of the contact point, and the inner protrusion is arranged on one end of the through hole away from the hole.

[0022] In another aspect, the application provides a Braille display using the technical scheme as follows:

[0023] A Braille display comprises the Braille display module as described above.

[0024] In summary, the application has the following beneficial technical effects:

[0025] The cam structure of the application converts the rotary motion of the rotary output mechanism into the linear motion of the driving top rod in the first direction without adopting the electromagnetic driving mode, solves the electromagnetic interference problem, avoids the electromagnetic interference between adjacent Braille point display units, and adopts the motor driving mode to make the device structure simple, the number of parts is small, the manufacturing and assembly costs are reduced, and the reliability is greatly improved.

[0026] The limiting block and the guide arc-shaped segment are arranged to block the rotation of the rotary output mechanism when the top rod is in place, thereby ensuring the accuracy of the top rod in place. Under the action of the spring force, the top rod can be quickly retracted during the process of the distal end of the cam structure contacting the top rod to the proximal end contacting the top rod. In combination with the position of the top rod abutting against the proximal end when the top rod abuts against the limiting block and the position of the top rod abutting against the guide arc-shaped segment, the top rod has a force acting on the cam or the guide arc-shaped segment, thereby avoiding the random rotation of the rotating disk after the rotary driving mechanism is powered off, and achieving the locking of the top rod in place.

[0027] The Braille display device of the application provides a more perfect information acquisition approach for visually impaired people, improves their travel convenience and participation, safety, and promotes the process of barrier-free public facilities, so that visually impaired people can live more freely, conveniently and harmoniously in public space. It provides more reading possibilities for the blind, which helps them better integrate into social life and learning. It can make it more convenient for visually impaired people to use and operate various facilities and home appliances, improve 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 improve their participation and integration. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 It is a schematic diagram of the overall appearance structure of the Braille display module of the application.

[0030] Figure 2 It is a sectional view of the Braille display module of the application.

[0031] Figure 3 It is another sectional view of the Braille display module of the application.

[0032] Figure 4 It is a schematic diagram of the position relationship between the driving device and the top rod when the top rod is in different extension states.

[0033] Figure 5An exploded structural schematic view of a Braille display module of the present application.

[0034] BRIEF DESCRIPTION OF DRAWINGS: 1, housing; 11, base; 12, upper cover; 2, display unit; 3, top rod; 31, telescopic rod; 32, contact; 33, outer protrusion; 34, inner protrusion; 35, spring; 4, driving device; 41, rotary output mechanism; 42, output shaft; 43, rotating disc; 44, cam structure; 45, distal end; 46, proximal end; 47, limiting block; 48, guiding 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 will be described in detail below with reference to the drawings.

[0036] The above embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. The present application can also be implemented or applied through other different specific embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that the various aspects described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings provided herein one skilled in the art will appreciate that one aspect can be implemented independently of any other aspects, and that an "application" can include, but is not limited to, any one or combination of the aspects described herein. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. In addition, an apparatus can be implemented or a method can be practiced using other structure and / or functionality in addition to or other than one or more of the aspects set forth herein.

[0038] It should also be noted that the drawings included in the present disclosure are included to illustrate potentially complex structures associated with the application. However, the drawings are included to describe what is believed to be the various aspects of the present application and are not intended to limit the present application in any way. Further, the drawings are not necessarily drawn to scale and any feature described with reference to a drawing can be combined with any other feature described with reference to any other drawing.

[0039] Also in the following description, specific details are provided to thoroughly understand examples. It will be apparent, however, to one skilled in the art that the described aspects can be practiced without these specific details.

[0040] The embodiment of the present application provides a Braille display module.

[0041] As shown in Figures 1 to 5 A Braille display module, comprising a display unit 2, the display unit 2 comprising a top rod 3 and a driving device 4.

[0042] As shown in Figure 2 and Figure 3 The driving device 4 comprises a rotating output mechanism 41 and a cam structure 44, the rotating output mechanism 41 having a rotating output shaft 42, the cam structure 44 being fixedly connected with the output shaft 42 of the rotating output mechanism 41, the rotating output mechanism 41 driving the cam structure 44 to rotate, the cam structure 44 comprising 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 being 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 being a second distance, the first distance being greater than the second distance; one end of the top rod 3 abutting against the outer circumferential surface of the cam structure 44, the cam structure 44 rotating to make the distal end 45 or the proximal end 46 abut against the top rod 3, so that the top rod 3 slides in a first direction. In an embodiment, the rotating output mechanism 41 is a motor, which can be a micro motor.

[0043] The present application drives the cam structure 44 to rotate by the rotating output mechanism 41, when the distal end 45 of the cam structure 44 abuts against the top rod 3, the top rod 3 is in an extended state, when the proximal end 46 of the cam abuts against the top rod 3, the top rod 3 is in a retracted state, the different extension and retraction states of the plurality of arrayed top rods 3 realize the representation of Braille, the setting of the cam structure 44 converts the rotary motion of the rotating output mechanism 41 into the linear motion of driving the top rod 3 in the first direction.

[0044] As shown in Figure 3 and Figure 4 The output shaft 42 is provided with a rotating disc 43, the cam structure 44 is mounted on the rotating disc 43, the rotating disc 43 is provided with a limiting block 47 and a guide arc segment 48, when the end of the top rod 3 abuts against the proximal end 46, the side of the top rod 3 abuts against the limiting block 47, one end of the guide arc segment 48 is connected with one side of the cam structure 44, the other end of the guide arc segment 48 extends to the limiting block 47. The guide arc segment 48 is connected with the side of the cam structure 44 close to the limiting block 47.

[0045] The circumferential profile of the guide arc segment 48 comprises a transition curve 49, one end of the transition curve 49 is transitionally connected with the distal end 45, the other end of the transition curve 49 extends to the limiting block 47, the proximal end 46 is located on the concave side of the transition curve 49, and the radial distance from the one end of the transition curve 49 extending to the limiting block 47 to the axis of the output shaft 42 is greater than the second distance.

[0046] The rotation of the rotating disc 43 drives the cam structure 44 and the guide arc segment 48 to rotate, so that the ejector rod 3 moves between the position abutting against the proximal end 46 and the side surface of the limiting block 47 and the position abutting against the transition curve 49 and the other side surface of the limiting block 47 through the outer circumferential surface of the proximal end 46, the outer circumferential surface of the distal end 45 and the transition curve 49.

[0047] The Braille display module comprises a housing 1, the housing 1 is provided with a slide for the ejector rod 3 to slide, the ejector rod 3 slides in the slide in the first direction, and the slide limits the displacement of the ejector rod 3 in other directions.

[0048] As shown in Figure 4 , during the rotation of the rotating disc 43, when the ejector rod 3 contacts the distal end 45 to the proximal end 46, when the ejector rod 3 abuts against the proximal end 46 of the cam structure 44, as shown in Figure 4 , the ejector rod 3 is in the retracted state, and one side of the limiting block 47 abuts against the side wall of the ejector rod 3, so that the ejector rod 3 limits the continuous rotation of the limiting block 47, and when the proximal end 46 of the cam structure 44 abuts against the ejector rod 3, the abutment between the ejector rod 3 and the limiting block 47 limits the rotation of the output shaft 42, so that the rotation of the rotating output mechanism 41 is blocked, that is, when the rotating output mechanism 41 drives the cam structure 44 to rotate to the position where the ejector rod 3 is in the retracted state, the ejector rod 3 blocks the rotating output mechanism 41, and then the rotating output mechanism 41 is powered off, so that the ejector rod 3 is in place and the cam stops rotating, thereby achieving the accurate retraction of the ejector rod 3.

[0049] During the rotation of the rotating disc 43, as shown in Figure 4 , after the ejector rod 3 contacts the proximal end 46 to the distal end 45, the rotating disc 43 continues to rotate, as shown in Figure 4As shown in FIG. 5, until the other side of the limiting block 47 abuts against the side wall of the top rod 3, in the process that the cam far end 45 contacts the top rod 3 to the end of the transition curve 49 far from the far end 45 contacts the top rod 3 by rotating the rotating disc 43, the top rod 3 and the curved surface contact ensure the stable sliding of the top rod 3 and the guiding arc segment 48, and the convex surface of the transition curve 49 contacts the top rod 3 and ensures that the top rod 3 cannot be retracted, and the radial distance from the end of the transition curve 49 far from the far end 45 to the axis of the output shaft 42 is greater than the second distance, that is, when the top rod 3 contacts the end of the transition curve far from the far end 45, the top rod 3 is still in the extended state, and at the same time, the limiting block 47 abuts against the top rod 3, the top rod 3 blocks the rotation of the rotating output mechanism 41, and then the rotating output mechanism 41 is powered off, so that the rotating disc 43 stops rotating after the top rod 3 is in place, and the accurate extension of the top rod 3 is realized.

[0050] In the embodiments of the present application, the blocking of the rotating output mechanism 41 by the top rod 3 in the extended state and the retracted state is realized by a limiting block 47, which reduces the volume of the structure while realizing the accurate stop of the top rod 3 in the extended state and the accurate stop of the top rod 3 in the retracted state, and is beneficial to the miniaturization design of the Braille display module.

[0051] The transition curve 49 is a circular arc, and the radial distance from the end of the transition curve 49 close to the limiting block 47 to the axis of the output shaft 42 is greater than or equal to the first distance. The circular arc transition curve 49 ensures the smoothness of the sliding of the top rod 3 and the transition curve 49 in the process from the far end 45 contacting the top rod 3 to the other end of the transition curve 49 contacting the top rod 3.

[0052] For how to ensure that the top rod 3 is in the extended or retracted state and the rotating output mechanism 41 is powered off, and how to make the top rod 3 more stably maintain in the extended or retracted state, the technical solutions are as follows in two embodiments:

[0053] In one embodiment, when the top rod 3 abuts against the proximal end 46 and the limiting block 47, the abutting point of the end of the top rod 3 and the proximal end 46 and the first radial line of the axis of the output shaft 42 are parallel to the first direction; when the top rod 3 abuts against the transition curve 49 and the limiting block 47, the abutting point of the end of the top rod 3 and the transition curve 49 and the second radial line of 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 top rod 3 in the length direction coincide. When the top rod 3 is in the extended state and the retracted state, the force of the top rod 3 on the cam structure 44 or the guiding arc segment 48 is in the radial direction of the output shaft 42, which can avoid the situation that the output shaft 42 is randomly rotated by the force of the top rod 3 after a person touches the top rod 3, and improves the stability of the top rod 3 in the extended state and the retracted state. The guiding arc segment 48 and the contact plane can also be arranged at the proximal end 46, and the contact plane contacts the end surface of the top rod 3 when the limiting block 47 and the top rod 3 abut against each other, which further improves the stability of the top 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 top rod 3 is a first straight line, the contact point between the end of the top rod 3 and the proximal end 46 when the top rod 3 abuts against the proximal end 46 and the limiting block 47 is located on one side of the first straight line away from the limiting block 47, and the contact point between the end of the top rod 3 and the transition curve 49 when the top rod 3 abuts against the transition curve 49 and the limiting block 47 is located on one side of the first straight line away from the limiting block 47. The force of the top rod 3 on the cam or the guiding arc segment 48 deviates from the side of the limiting block 47, so that the rotating disc 43 has a driving force to drive the limiting block 47 to continue to approach the top rod 3, but the rotating disc 43 cannot continue to rotate due to the limiting action of the top rod 3, so that the top rod 3 can be stably kept in the extended or retracted state.

[0055] As shown in Figure 1 , Figure 2 and Figure 5 , a plurality of display units 2 are mounted on the shell 1, and a plurality of accommodating spaces are arranged in the shell 1, the accommodating spaces include a first channel 5 and a second channel 6 which are in communication with each other, the top rod 3 slides in the first channel 5, which corresponds to the sliding channel described above; the rotating 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 axis 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 in communication with the outside for the top rod 3 to extend out of the shell 1 from the end away from the cam structure 44. The length direction of the top 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] As shown in Figure 3 , an outer protrusion 33 is arranged on the side wall of the end of the top rod 3 away from the cam structure 44, the outer protrusion 33 is located in the first channel 5, an inner protrusion 34 is arranged on the inner wall of the end of the first channel 5 away from the second channel 6, the inner protrusion 34 is located on the side of the outer protrusion 33 away from the second channel 6, and a spring 35 is arranged between the outer protrusion 33 and the inner protrusion 34 and surrounds the outer periphery of the top rod 3, the spring 35 is used to apply a force away from the inner protrusion 34 to the outer protrusion 33. During the process that the rotating disc 43 rotates to make the distal end 45 of the cam structure 44 contact the top rod 3 to the proximal end 46 of the top rod 3, the top rod 3 can be quickly retracted under the action of the spring 35. In combination with the position of the top rod 3 abutting against the proximal end 46 when the top rod 3 abuts against the limiting block 47 and the position of the top rod 3 abutting against the guiding arc segment 48, the top rod 3 has a force on the cam or the guiding arc segment 48, which avoids the random rotation of the rotating disc 43 after the power of the rotating driving mechanism is turned off.

[0057] The shell 1 comprises 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 communicating with the second channel 6, the upper cover 12 is provided with a through hole 52 corresponding to the hole 51, and the hole 51 and the through hole 52 constitute the first channel 5; the top rod 3 comprises 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 with 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 hole 51. The shell 1 is divided into the base 11 and the upper cover 12, so that the telescopic rod 31 and the contact 32 are conveniently installed, the contact 32 has a columnar structure, and is used for being touched by the blind.

[0058] The application further discloses a Braille display.

[0059] The application further discloses a Braille display.

[0060] The Braille display further comprises a mounting seat and a circuit board, the Braille display module and the circuit board are mounted on the mounting seat, and the circuit board is electrically connected with a power supply end of the rotating output mechanism 41 in a contact mode.

[0061] The above merely illustrates the specific implementation of the application, but the protection scope of the application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A Braille display module, characterized in that, It includes a display unit (2), which includes a top rod (3) and a driving device (4); The driving device (4) includes a rotary output mechanism (41) and a cam structure (44). The rotary output mechanism (41) has a rotating 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) includes a distal end (45) and a proximal end (46). The distance between the rotation axis of the distal end (45) and the cam structure (44) in the radial direction of the output shaft (42) is a first distance. The distance between the rotation axis of the proximal end (46) and the cam structure (44) in the radial direction of the output shaft (42) is also a first distance. The first distance is greater than a 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 turntable (43) is mounted on the output shaft (42), and a cam structure (44) is mounted on the turntable (43). The turntable (43) is provided with a limiting block (47) and a guide arc segment (48). When the end of the push rod (3) and the proximal end (46) abut together, the side of the push rod (3) abuts together with the limiting 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 limiting block (47). The circumferential profile of the guide arc segment (48) includes a transition curve (49), one end of the transition curve (49) is connected to the distal end (45), the other end of the transition curve (49) extends to the limiting 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 limiting block (47) and the axis of the output shaft (42) is greater than a second distance; 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 peripheral surface of the proximal end (46), the outer peripheral surface of the distal end (45) and the transition curve (49), and moves between the position of abutting the proximal end (46) and abutting one side of the limiting block (47) and the position of abutting the transition curve (49) and abutting the other side of the limiting block (47).

3. The Braille display module according to claim 2, characterized in that, The transition curve (49) is an arc, and the radial distance from the end of the transition curve (49) near the limiting 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 near end (46) and the limiting block (47), the first radial line connecting the abutment point of the end of the push rod (3) and the near 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 limiting block (47), the second radial line connecting the abutment point of 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, The straight line passing through the axis of the output shaft (42) and parallel to the sliding direction of the push rod (3) is the first straight line. When the push rod (3) abuts against the near end (46) and against the limiting block (47), the contact point between the end of the push rod (3) and the near end (46) is located on the side of the first straight line away from the limiting block (47). When the push rod (3) abuts against the transition curve (49) and against the limiting 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 away from the limiting block (47).

6. The Braille display module according to any one of claims 1-5, characterized in that, The Braille display module also includes a housing (1), on which several display units (2) are installed. The housing (1) has multiple spaced-apart accommodating spaces, including a first channel (5) and a second channel (6) that are interconnected. The push rod (3) slides in the first channel (5). The rotary 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). The end of the first channel (5) away from the second channel (6) is connected to the outside for the push rod (3) to extend out of the housing (1) away from the cam structure (44).

7. The Braille display module according to claim 6, characterized in that, The push rod (3) has an outer protrusion (33) on the side wall away from the cam structure (44). The outer protrusion (33) is located in the first channel (5). The inner wall of the first channel (5) away from the second channel (6) has an inner protrusion (34). 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 to apply a force away from the inner protrusion (34) to the outer protrusion (33).

8. The Braille display module according to claim 7, characterized in that, The housing (1) includes a base (11) and a top cover (12). The second channel (6) is located in the base (11). The base (11) is provided with a channel (51) communicating with the second channel (6). The top cover (12) is provided with a through hole (52) corresponding to the channel (51). The channel (51) and the through hole (52) form 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), and the other end of the telescopic rod (31) extends into the through hole (52) and connects 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 provided on the outer periphery of the contact (32), and the inner protrusion (34) is provided on the end of the through hole (52) away from the channel (51).

9. A Braille display, characterized in that, Includes the Braille display module as described in any one of claims 1-8.

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