CN211403789U

CN211403789U - Braille display module and Braille display device

Info

Publication number: CN211403789U
Application number: CN201922368515.8U
Authority: CN
Inventors: 钱威; 翁孟坤
Original assignee: Beijing Sanye Nebula Interactive Technology Co ltd
Current assignee: Beijing Hongdian Internet technology research and Development Co.,Ltd.; Zhongqing Intelligent Equipment Kunshan Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-09-01
Anticipated expiration: 2029-12-24

Abstract

The invention relates to the technical field of Braille display, in particular to a Braille display module and a Braille display device. The Braille display module comprises a plurality of display mechanisms, wherein each display mechanism comprises an electromagnetic driving device and an ejector rod; the electromagnetic driving device comprises an electromagnetic mechanism and a magnetic push rod assembly; the push rod assembly comprises a push rod, and the electromagnetic mechanism can make the push rod perform telescopic action along a first direction by changing the magnetic pole direction of the electromagnetic mechanism; the push rod can do telescopic motion along a second direction by telescopic motion along a first direction; the first direction and the second direction are arranged in an angle. The Braille display device comprises the Braille display module. The invention has the characteristics of timely reaction and small heat productivity.

Description

Braille display module and Braille display device

Technical Field

The invention relates to the technical field of Braille display, in particular to a Braille display module and a Braille display device.

Background

The Braille is formed by arranging a plurality of salient point structures and used for special crowds to acquire character information through touch, the Braille is composed of character information of one party, eight or six independent point structures of one party, and the character information is combined into expression by rising or falling of different point structures of each party. At present, a Braille display module is adopted to express one part of text information, the raising or lowering of a driving point structure is realized by adopting memory metal, and the driving mode has the defects of slow response and large heat productivity.

Disclosure of Invention

The invention aims to provide a Braille display module and a Braille display device, which solve the technical problems of slow response and large heat generation in the mode of driving a dot structure to rise or fall by using memory metal in the prior art.

The invention provides a Braille display module which comprises a plurality of display mechanisms, wherein each display mechanism comprises an electromagnetic driving device and an ejector rod;

the electromagnetic driving device comprises an electromagnetic mechanism and a magnetic push rod assembly; the push rod assembly comprises a push rod, and the electromagnetic mechanism can make the push rod perform telescopic action along a first direction by changing the magnetic pole direction of the electromagnetic mechanism; the push rod can do telescopic motion along a second direction by telescopic motion along a first direction; the first direction and the second direction are arranged in an angle.

In any of the above technical solutions, further, the display mechanism further includes a top bead, and the push rod has a first end and a second end opposite to each other; the ejector rod is provided with an opposite extending end and an opposite abutting end; the second end of the push rod is provided with a curved surface structure, the abutting end of the ejector rod is provided with a curved surface structure, and both the curved surface structure of the second end of the push rod and the curved surface structure of the abutting end of the ejector rod can be tangent to the surface of the ejector bead so that the telescopic action of the push rod along the first direction is changed into the telescopic action of the ejector rod along the second direction through the ejector bead; the first direction is perpendicular to the second direction.

In any of the above technical solutions, further, the braille display module further includes a module base, and the module base is provided with a first channel and a second channel communicated with the first channel; the push rod is inserted into the first channel, the ejector rod is inserted into the second channel, and the ejector bead is positioned between the push rod and the ejector rod; the length extension direction of the first channel is parallel to the first direction, and the length extension direction of the second channel is parallel to the second direction.

In any of the above technical solutions, further, the braille display module further includes a module upper cover, and the module upper cover is fixedly connected with the module base; the display mechanism further comprises a return spring, a third channel correspondingly communicated with the second channel is formed in the upper cover of the module, the return spring is sleeved on the ejector rod, and the return spring is limited in the third channel and used for driving the ejector bead to move when the ejector rod retracts.

In any of the above technical solutions, further, the plurality of display mechanisms are arranged on two opposite sides of the module base, and the plurality of display mechanisms located on the same side of the module base are distributed in rows and columns;

or the plurality of display mechanisms are arranged on one side of the module base and are distributed in rows and columns.

In any of the above technical solutions, further, the electromagnetic driving device further includes an elastic member;

the push rod extends along a first direction to have a separation state separated from the electromagnetic mechanism; the push rod retracts along a first direction to have an engagement state engaged with the electromagnetic mechanism;

the push rod is shiftable between the disengaged state and the engaged state;

the elastic piece is used for enabling the push rod to keep the separation state; the elastic piece is arranged between the push rod and the electromagnetic mechanism; the first direction is parallel to the axial direction of the push rod.

In any of the above technical solutions, further, the push rod assembly further includes a first magnet for making the push rod assembly magnetic; the first magnet is fixedly connected with the push rod.

In any of the above technical solutions, further, the push rod assembly further includes a buffer member, the buffer member is fixedly connected with the push rod, and the first end faces the electromagnetic mechanism; the buffer piece is close to the first end, and the first magnet is far away from the first end.

The invention also provides a Braille display device which comprises the Braille display module.

In any of the above technical solutions, further, the braille display device further includes a housing and a circuit board; the Braille display module and the circuit board are installed on the shell, and the circuit board is electrically connected with the electromagnetic mechanism in a contact mode.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a Braille display module which comprises a plurality of display mechanisms, wherein each display mechanism comprises an electromagnetic driving device and an ejector rod; the electromagnetic driving device comprises an electromagnetic mechanism and a magnetic push rod assembly; the push rod assembly comprises a push rod, and the electromagnetic mechanism can make the push rod perform telescopic action along a first direction by changing the magnetic pole direction of the electromagnetic mechanism; the push rod can do telescopic motion along a second direction by telescopic motion along a first direction; the first direction and the second direction are arranged in an angle. The display mechanisms are convenient to form character information on one side, the display mechanisms realize the telescopic action of the push rod along the first direction by utilizing the electromagnetic mechanism to change the magnetic pole direction of the display mechanisms, and can enable the push rod to perform the telescopic action along the second direction through the telescopic action of the push rod. The electromagnetic mechanism is matched with the push rod assembly, so that the push rod can be timely extended or retracted; in addition, the electromagnetic mechanism can shorten the electrifying time, thereby being beneficial to reducing the heat generation of the electromagnetic driving device.

The invention also provides a Braille display device which comprises the Braille display module. Based on the analysis, the Braille display device has the characteristics of timely response and small heat productivity.

It is to be understood that both the foregoing general description and the following detailed description are for purposes of illustration and description and are not necessarily restrictive of the disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of the disclosure. Together, the description and drawings serve to explain the principles of the disclosure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of an electromagnetic driving apparatus provided in an embodiment of the present invention;

FIG. 2 is an assembly view of an electromagnetic drive apparatus provided in accordance with an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another view angle of an electromagnetic driving device according to an embodiment of the present invention;

FIG. 4 is a schematic view of a push rod assembly of an electromagnetic driving device according to an embodiment of the present invention while the push rod assembly is kept in a clutch state;

fig. 5 is a state diagram of an electromagnetic assembly of the electromagnetic driving apparatus according to the embodiment of the present invention when a forward current is applied thereto;

FIG. 6 is a schematic view of the push rod assembly of the electromagnetic driving device according to the present invention in an engaged state;

FIG. 7 is another state diagram of the electromagnetic assembly of the electromagnetic driving apparatus according to the embodiment of the present invention when a reverse current is applied thereto;

FIG. 8 is a cross-sectional view of a housing assembly in an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a front case according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a rear housing in an embodiment of the present invention;

FIG. 11 is a schematic structural view of a wiring portion in an embodiment of the present invention;

FIG. 12 is a schematic view showing a structure of a wiring portion mounted on a rear case in the embodiment of the present invention;

FIG. 13 is a cross-sectional view taken along line E-E of FIG. 12;

FIG. 14 is a schematic structural view from another perspective of the wire connecting portion mounted on the rear case in the embodiment of the present invention;

FIG. 15 is a cross-sectional view taken along line D-D of FIG. 14;

fig. 16 is a schematic structural diagram of another view angle of an electromagnetic driving device according to an embodiment of the present invention;

FIG. 17 is an assembly view of a Braille display module according to an embodiment of the present invention;

fig. 18 is an exploded view of a braille display module according to an embodiment of the present invention;

FIG. 19 is a cross-sectional view of a Braille display module provided in an embodiment of the present invention;

FIG. 20 is a schematic structural diagram of a module base according to an embodiment of the present invention;

FIG. 21 is a schematic structural diagram of a lift pin according to an embodiment of the present invention;

fig. 22 is a schematic structural view (partial explosion) of the braille display device according to the embodiment of the present invention.

Icon:

100-an electromagnetic drive; 101-a spring; 102-a push rod; 103-a first magnet; 104-a working part; 105-a connecting portion; 106-curved surface structure; 107-buffer; 108-a first end; 109-a second end; 110-an excitation coil; 111-an electromagnet core; 112-an insertion portion; 113-the first subsection; 114-the second subsection; 115-a front shell; 116-a rear shell; 117-square hole; 118-a snap-fit arrangement; 119-an extension; 120-a conductive terminal; 121-a junction box; 122-open slots; 123-a first chute; 124-groove edge structure; 125-channel roof construction; 126-arc shaped stop groove; 127-a curved end; 128-via.

200-a Braille display module; 201-a top rod; 202-an extension end; 203-an abutting end; 204-top bead; 205-module base; 206-a first channel; 207-a second channel; 208-a concave curved surface; 209-module upper cover; 210-a return spring; 211-positioning through holes; 212-a locating post; 213-first sub-track; 214-second sub-track; 215-a first cylindrical portion; 216-a second cylindrical portion; 217-a third cylindrical portion; 218-a display surface; 219-positioning protrusions; 220-mounting grooves; 221-positioning concave holes; 222-fitting a curved surface;

300-a circuit board;

400-a housing; 401-edge plate; 402-separation plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 17 to 21, a first embodiment of the invention provides a braille display module 200, which includes a plurality of display mechanisms, each of which includes an electromagnetic driving device 100 and a top rod 201; the electromagnetic driving device comprises an electromagnetic mechanism and a magnetic push rod assembly; the push rod assembly comprises a push rod, and the electromagnetic mechanism can make the push rod perform telescopic action along a first direction by changing the magnetic pole direction of the electromagnetic mechanism; the push rod can do telescopic motion along the second direction by telescopic motion along the first direction; the first direction and the second direction are arranged in an angle.

Specifically, the jack 201 has an opposite protruding end 202 and an abutting end 203, and the protruding end 202 of the jack 201 can be used as a point structure to realize the expression of the text message. In the braille display module 200, the number of display mechanisms may be 8 to realize eight-dot braille. The electromagnetic driving device can achieve the purpose of low energy consumption, and is favorable for the electromagnetic driving device to achieve rapid response of the telescopic action of the ejector rod 201. The moving direction of the push rod is different from that of the push rod 201, which is advantageous to reduce the space occupied by the braille display module 200. When the extending end 202 of the jack 201 of the 8 display mechanisms displays the character information as a dot structure, the 8 dot structures are arranged in four rows and two columns.

It should be noted that, in the braille display module 200, the number of the display mechanisms may also be 6, so as to realize six-dot braille.

The braille display module 200 according to this embodiment is configured such that one character information is formed by a plurality of display mechanisms, and the display mechanisms realize the telescopic action of the push rod in the first direction by changing the magnetic pole direction thereof by the electromagnetic mechanism, and enable the telescopic action of the push rod 201 in the second direction by the telescopic action of the push rod. The electromagnetic mechanism is matched with the push rod assembly, so that the push rod can be timely extended or retracted; in addition, the electromagnetic mechanism can shorten the electrifying time, thereby being beneficial to reducing the heat generation of the electromagnetic driving device.

In an alternative to this embodiment, the display mechanism further includes a top bead 204, the push rod having opposite first and second ends; the second end of the push rod is provided with a curved surface structure, the abutting end 203 of the push rod 201 is provided with a curved surface structure, and both the curved surface structure of the second end of the push rod and the curved surface structure of the abutting end 203 of the push rod 201 can be tangent to the surface of the ejector ball 204, so that the telescopic action of the push rod along the first direction is changed into the telescopic action of the push rod 201 along the second direction through the ejector ball 204; the first direction is perpendicular to the second direction. The telescopic motion of the push rod is converted into the telescopic motion of the push rod 201 through the push bead 204, and after the push bead 204 is adopted, the success rate of motion steering can be improved, and the push rod 201 can be ensured to be capable of stretching out. Because the second end of the push rod and the butt joint end 203 of the push rod 201 both have curved surface structures, the curved surface structures can be spherical crowns, and the ejecting ball 204 is a round ball, when the push rod does the extension action, the ejecting ball 204 can be rotated to a certain extent, and because the curved surface structures are tangent to the surface of the ejecting ball 204, when the ejecting ball 204 rotates, the push rod 201 can be smoothly extended, so that the force of the push rod can be smoothly transmitted to the push rod 201.

In an optional scheme of this embodiment, the braille display module 200 further includes a module base 205, and the module base 205 is provided with a first channel 206 and a second channel 207 communicated with the first channel 206; the push rod is inserted into the first channel 206, the push rod 201 is inserted into the second channel 207, and the top ball 204 is positioned between the push rod and the push rod 201; the first channel 206 has a length extending in parallel to the first direction, and the second channel 207 has a length extending in parallel to the second direction. Through the module base 205 to facilitate assembly of the stem 201, the pushrod assembly, and the ball 204.

Specifically, the junction of the first channel 206 and the second channel 207 has a concave curved surface 208, the concave curved surface 208 is matched with the curved surface structure of the second end of the push rod, when the push rod is fully extended, the curved surface structure of the second end of the push rod can be accommodated by the concave curved surface 208 of the junction, so that the push rod 201 can be fully extended; when the ram 201 is fully extended, the tangential orientation of the top bead 204 changes from being tangential to the curved surface of the second end of the ram to the tangential orientation of the top bead 204 to the axial surface of the ram.

In an optional scheme of this embodiment, the braille display module 200 further includes a module upper cover 209, and the module upper cover 209 is fixedly connected with the module base 205; the display mechanism further comprises a return spring 210, a third channel correspondingly communicated with the second channel 207 is formed in the module upper cover 209, the return spring 210 is sleeved on the ejector rod 201, and the return spring 210 is limited in the third channel and used for driving the ejector ball 204 to move when the ejector rod 201 retracts. The retraction of the plunger 201 is ensured by the module cover 209 and the return spring 210.

Specifically, the module upper cover 209 has two positioning through holes 211 disposed opposite to each other, the module base 205 has two positioning posts 212 corresponding to the positioning through holes 211, the positioning through holes 211 are stepped holes, such that the positioning through holes 211 include a large-diameter portion and a small-diameter portion, the positioning posts 212 are inserted into the small-diameter portion of the positioning through holes 211, after the positioning posts 212 are inserted, fasteners, such as screws, are used, after the large-diameter portion of the positioning through holes 211 is inserted, the screws are screwed into the threaded holes on the positioning posts 212, and since the screw heads are stopped by the stepped surfaces of the positioning through holes 211, the fixed connection between the module upper cover 209 and the module base 205 is achieved, and the corresponding connection between the second channel 207 and the third channel is also achieved. The length extension direction of the third channel is parallel to the length extension direction of the second channel 207. The number of the first channels 206, the number of the second channels 207 and the number of the third channels are equal to each other. A first channel 206, a second channel 207 and a third channel form a working channel for mounting an electromagnetic driving device of a display mechanism, the plunger 201, the return spring 210 and the plunger. Since the number of display means is 8 in this embodiment, the number of working channels is correspondingly 8.

The third channel includes a first sub-track 213 and a second sub-track 214, the diameter of the first sub-track 213 being smaller than the diameter of the second sub-track 214; the first sub-channel 213, the second sub-channel 214, the second channel 207 and the first channel 206 are communicated in sequence. The diameter of the second channel 207 is smaller than the diameter of the second sub-track 214. The return spring 210 is located within the second sub-passage 214. The mandril 201 comprises a first cylindrical part 215, a second cylindrical part 216 and a third cylindrical part 217 which are connected in sequence; the free end of the first cylindrical portion 215 is the protruding end 202 of the jack 201, and the free end of the third cylindrical portion 217 is the abutting end 203 of the jack 201. The end surface of the protruding end 202 of the jack 201 is a plane. The diameter of the first cylindrical portion 215 is smaller than that of the second cylindrical portion 216, and the diameter of the third cylindrical portion 217 is smaller than that of the second cylindrical portion 216. The diameter of the first cylindrical portion 215 may be larger than the diameter of the third cylindrical portion 217. The diameter of the second cylindrical portion 216 is smaller than the diameter of the second sub-passage 214. The diameter of the first cylindrical portion 215 is smaller than the diameter of the first sub-passage 213. The diameter of the second cylindrical portion 216 is larger than the diameter of the first sub-passage 213. The return spring 210 is sleeved on the first cylindrical portion 215, and one end of the return spring 210 is abutted by a stepped surface formed by the diameter difference between the first sub-channel 213 and the second sub-channel 214, and the other end of the return spring 210 is abutted by a stepped surface formed by the diameter difference between the first cylindrical portion 215 and the second cylindrical portion 216, so that the return spring 210 is compressed after the extending end 202 of the push rod 201 extends out of the outer surface of the module upper cover 209, i.e. the display surface 218; when the push rod retracts, the return spring 210 releases the elastic force, so that the push rod 201 also retracts.

In an alternative solution of this embodiment, the plurality of display mechanisms are disposed on two opposite sides of the module base 205, and the plurality of display mechanisms located on the same side of the module base 205 are distributed in rows and columns. This facilitates reducing the space occupied by the electromagnetic drive device.

Specifically, in this embodiment, the side of the module base 205 on which the display mechanism is mounted is in a perpendicular relationship with the display surface 218 of the module top cover 209. The display surface 218 of the module top cover 209 is parallel to the top surface of the module base 205. The module top cover 209 is mounted to the top surface of the module base 205. The XY plane is parallel to the display surface 218.

Four display mechanisms are located on the left side of the module base 205 and four other display mechanisms are located on the right side of the module base 205. The four display mechanisms on the same side are arranged in two rows and two columns, that is, the four display mechanisms on the same side are distributed along a third direction, the third direction is perpendicular to the upper surface of the module base 205, and if two of the display mechanisms are located above the other two display mechanisms, because the two of the display mechanisms are located above the other two display mechanisms, the length of the third cylindrical portion 217 of the top rod 201 in the two display mechanisms below is greater than that of the top rod 201 in the two display mechanisms above in the four display mechanisms on the same side, and correspondingly, the lengths of the second channels 207 suitable for the four display mechanisms are also different; however, the first cylindrical portions 215 of all the lift pins 201 in the eight display mechanisms are equal in length, and the second cylindrical portions 216 of all the lift pins 201 in the eight display mechanisms are equal in length, so as to ensure that the first cylindrical portions 215 extend out of the display surface 218 by equal lengths.

It should be noted that, a plurality of display mechanisms may also be arranged on one side of the module base, and the plurality of display mechanisms are distributed in rows and columns. For example, a plurality of display mechanisms are all arranged on the left side surface of the module base, or a plurality of display mechanisms are all arranged on the right side surface of the module base, or all arranged on other side surfaces of the module base.

In an optional aspect of this embodiment, the electromagnetic drive apparatus further includes a housing assembly, the housing assembly including a front housing and a rear housing; the front end surface of the front shell is provided with two positioning protrusions 219; the left side surface and the right side surface of the module base 205 are both provided with two mounting grooves 220 which are distributed up and down; the channel opening of the first channel 206 is positioned at the bottom of the mounting groove 220; the groove bottom of the mounting groove 220 is provided with positioning concave holes 221 corresponding to the positioning protrusions 219 one by one, and the depth of the positioning concave holes 221 is not less than the length of the positioning protrusions 219. In each mounting groove 220, two electromagnetic driving devices are mounted. The side walls of the mounting slot 220 include mating curved surfaces 222, the mating curved surfaces 222 adapted to mate with surfaces of the housing assembly. The left side and the right side of the module base 205 are both of a stepped structure, and the two mounting grooves 220 on the same side are respectively located on different stepped surfaces of the stepped structure, so that after the four display mechanisms on the same side are mounted, the rear ends of the rear housings of the two electromagnetic driving devices located above and the rear ends of the rear housings of the two electromagnetic driving devices located below are not on the same plane.

It should be noted that the positioning protrusion 219 may be in interference fit with the positioning concave hole 221, so as to ensure that the electromagnetic driving device is fixedly mounted on the module base 205.

In an optional aspect of this embodiment, the electromagnetic driving device further includes an elastic member; the push rod extends along the first direction to have a separation state separated from the electromagnetic mechanism; the push rod retracts along a first direction to have an engagement state engaged with the electromagnetic mechanism; the push rod can be changed between a separation state and an engagement state; the elastic piece is used for keeping the push rod in a separated state; the elastic piece is arranged between the push rod and the electromagnetic mechanism; the first direction is parallel to the axial direction of the push rod. The elastic piece is used for ensuring that the push rod can complete the telescopic action.

In this embodiment, one operating state of the braille display module 200 is: the push rod positioned above the left side is in an extending state, and the corresponding ejector rod 201 is in an extending state; the push rod on the right side is in a retracted state, and the corresponding push rod 201 is in a retracted state.

Referring to fig. 1 to 16, an electromagnetic driving apparatus includes an elastic member, an electromagnetic mechanism, and a push rod assembly having magnetism. The push rod assembly includes a push rod 102, the push rod 102 having a disengaged state separated from the electromagnetic mechanism and an engaged state engaged with the electromagnetic mechanism. The magnetic push rod component interacts with the electromagnetic mechanism so as to enable the push rod to move along a first direction by changing the magnetic pole direction of the electromagnetic mechanism and enable the push rod to be changed between a separation state and an engagement state; and in the conversion process of the electromagnetic mechanism and the push rod from the joint state to the separation state, the elastic piece can provide elastic force for the push rod so as to ensure that the push rod can be smoothly separated from the electromagnetic mechanism. In the process of switching the electromagnetic mechanism and the push rod from the joint state to the separation state, the push rod is subjected to both the magnetic force of the electromagnetic mechanism and the elastic force of the elastic piece. When the push rod is switched back and forth between the separation state and the connection state, the push rod is under the combined action of magnetic force and elastic force. The separation state and the engagement state refer to relative rest states, and the relative distance (or the relative position) between the push rod and the electromagnetic mechanism is kept unchanged in the separation state; in the engaged state, the relative distance (or relative position) between the push rod and the electromagnetic mechanism is kept constant. The elastic member is used for enabling the push rod to maintain a separated state separated from the electromagnetic mechanism.

The electromagnetic driving device provided by the embodiment enables the push rod assembly to have magnetism so as to interact with the electromagnetic mechanism, and enables the magnetic pole direction of the push rod assembly to be changed through the electromagnetic mechanism so as to enable the push rod to move along the first direction and enable the push rod to be changed between the separation state and the engagement state; the elastic piece can provide extra power for the electromagnetic mechanism in the process of separating from the push rod through the elasticity of the elastic piece, and when the push rod is in the state of separating from the electromagnetic mechanism, the push rod can be kept in the state of separating from the electromagnetic mechanism through the elastic piece, so that the accuracy of Braille display is guaranteed.

In an optional scheme of the embodiment, the elastic piece is arranged between the push rod and the electromagnetic mechanism; the first direction is parallel to the axial direction of the push rod. The elastic piece is arranged between the push rod and the electromagnetic mechanism, so that the elastic force provided by the elastic piece and the magnetic force provided by the electromagnetic mechanism act on the push rod, and the movement direction of the push rod is parallel to the axial direction of the push rod, thereby being beneficial to reducing the volume of the electromagnetic driving device.

In an alternative to this embodiment, the resilient member is a spring 101. By arranging the elastic member as a spring, the compression is facilitated to reduce the space occupied by the elastic member when compressed.

Specifically, the spring 101 may be a compression spring.

In an alternative of this embodiment, the push rod assembly further includes a first magnet 103 for making the push rod assembly magnetic; the first magnet 103 is fixedly connected with the push rod. The cost of the push rod assembly can be reduced by providing the first magnet 103. The first magnet 103 is a permanent magnet.

Specifically, the first magnet 103 has an annular shape; the push rod includes a working portion 104 and a connecting portion 105. The working portion 104 is connected to the connecting portion 105, wherein the diameter of the working portion 104 is larger than the diameter of the connecting portion 105. The first magnet 103 is sleeved on the connecting portion 105, and an annular surface of the first magnet 103 is limited by a stepped surface formed between the working portion 104 and the connecting portion 105. The first magnet 103 and the connecting portion 105 may be fixedly connected by interference fit and/or gluing, so that the first magnet 103 may move together with the push rod. One end of the working portion 104 is connected to one end of the connecting portion 105; the opposite end of the working portion 104 has a smooth curved surface 106, and the curved surface 106 may be a spherical cap.

In an optional scheme of this embodiment, the push rod assembly further includes a buffer 107, the buffer 107 is fixedly connected with the push rod, the push rod has a first end 108 and a second end 109 opposite to each other, and the first end 108 faces the electromagnetic mechanism; the buffer 107 is close to the first end 108, and the first magnet 103 is far from the first end 108. The first magnet 103 is protected by the buffer member 107, and the service life of the push rod assembly is prolonged.

Specifically, the buffer 107 may be made of a material having magnetic conductivity and impact resistance, such a material may be a metal, and the metal may be iron or an iron alloy. The buffer part 107 is also in a ring shape, and the buffer part 107 is sleeved on the connecting part 105 of the push rod; the buffer member 107 and the connecting portion 105 may be fixedly connected by interference fit and/or gluing. The second end 109 of the push rod, i.e. the end of the working portion 104 having the curved surface structure 106; the first end 108 of the push rod is the other end of the connecting portion 105. One ring surface of the buffer member 107 is attached to the other ring surface of the first magnet 103. The end surface of the other end of the connecting portion 105 does not extend beyond the other annular surface of the buffer 107. The buffer member 107 has an outer diameter smaller than that of the first magnet 103, which facilitates installation of the compression spring.

The material of the buffer 107 may be magnetic plastic. The first magnet 103 and the connecting portion 105 may be fixedly connected by a screw, and the cushion member 107 and the connecting portion 105 may be fixedly connected by a screw.

In an optional scheme of this embodiment, the electromagnetic mechanism includes an excitation coil 110 and an electromagnetic core 111, and the excitation coil 110 is sleeved outside the electromagnetic core 111. This makes it possible to change the direction of the magnetic poles at both ends of the electromagnet core 111 by changing the direction of the current in the exciting coil 110. The exciting coil 110 is wound around the outside of the electromagnet core 111 to be fixedly connected to the electromagnet core 111.

Specifically, the electromagnet core 111 includes an insertion portion 112, and an exterior portion connected to the insertion portion 112. The exciting coil 110 is wound around the insertion portion 112. The external portion includes a first sub-portion 113 and a second sub-portion 114 connected to the first sub-portion 113, wherein the diameter of the first sub-portion 113 is smaller than that of the second sub-portion 114, and the diameter of the first sub-portion 113 is larger than that of the insertion portion 112. This may result in a stronger magnetic field at the outer portion. The end surface of the outer portion is opposite to the other annular surface opposite to the buffer member 107, and when the push rod is in the engaged state, the spring is compressed, and the other annular surface opposite to the buffer member 107 is attached to the end surface of the outer portion. Since the buffer member 107 has a magnetic conductive function and the first magnet 103 is a permanent magnet, when the exciting coil 110 is not energized, the electromagnet core 111 can be attracted by the first magnet 103, in this case, the magnetic force of the first magnet 103 to the electromagnet core 111 is greater than the elastic force of the compressed spring to the push rod assembly, so that the push rod can be maintained in the engaged state. The spring is sleeved outside the buffer piece 107, and one end of the spring is abutted with a step surface formed by the diameter difference between the buffer piece 107 and the first magnet 103; the spring is also sleeved on the first sub-portion 113, and the other end of the spring is abutted with a stepped surface formed by the diameter difference between the first sub-portion 113 and the second sub-portion 114, so that the spring is clamped between the push rod assembly and the electromagnetic mechanism.

In an optional scheme of this embodiment, the front shell 115 and the rear shell 116 are fixedly connected in a snap-fit manner, so that an inner cavity of the front shell 115 and an inner cavity of the rear shell 116 form a cavity; the electromagnetic mechanism and the elastic piece are both arranged in the containing cavity, at least part of structure of the push rod assembly is located in the containing cavity, and at least part of structure of the push rod can extend out of or retract into the containing cavity. The push rod assembly, the electromagnetic mechanism and the elastic member are assembled together by the housing assembly. The working portion 104 is able to extend or retract into the cavity while the connecting portion 105 is located in the cavity. The working portion 104 can be extended or retracted from the through hole on the front case 115.

Specifically, the first magnet 103 and the buffer 107 of the push rod assembly are located in the cavity. The front shell 115 and the rear shell 116 may each be a cylindrical structure having an inner cavity, and the inner cavity extends along an axial direction of the cylindrical structure. A plurality of square holes 117 are uniformly formed on the outer peripheral surface of the end part of the circular opening of the rear shell 116; the end of the circular opening of the front case 115 has an extension 119, and the outer diameter of the extension 119 is smaller than that of the front case 115, and the difference in diameter between the extension 119 and the front case 115 forms a stepped surface. The peripheral surface of the extension portion 119 is provided with a plurality of snap structures 118 which are matched with the square holes 117 and are in one-to-one correspondence, and the snap structures 118 can be snapped into the square holes 117 of the front shell 115. When installed, the extension 119 is inserted into the inner cavity of the front shell 115, and the snap structure 118 is snapped into the square hole 117 of the front shell 115, thereby achieving a fixed connection between the front shell 115 and the rear shell 116. The end face of the circular opening of the front shell 115 is attached to the step face of the rear shell 116, and axial limiting of the front shell 115 on the rear shell 116 is achieved. It should be noted that, the material of the outer shell and the inner shell may have magnetic conductivity.

In an optional scheme of this embodiment, the electromagnetic driving device further includes a wire connection portion, the wire connection portion includes a conductive terminal 120 and a terminal box 121, the conductive terminal 120 is mounted on the terminal box 121, and the terminal box 121 is detachably connected to the housing assembly; the conductive terminals 120 are electrically connected to the electromagnetic mechanism. The conductive terminals 120 are also used for electrically connecting with an external power source. Through setting up wiring portion, can realize the circular telegram to electromagnetic mechanism after connecing external power source.

In an alternative scheme of this embodiment, the rear case 116 has an open slot 122, the wire connecting portion has two first sliding slots 123 disposed oppositely, two opposite slot-side structures 124 on the open slot 122 are respectively inserted into the two first sliding slots 123 disposed oppositely, and the slot-side structures 124 are radially limited by two slot walls opposite to the first sliding slots 123, so that the junction box 121 and the housing assembly are detachably connected.

Specifically, the width of the first sliding groove 123 may be smaller than or equal to the thickness of the groove edge structure 124 of the open groove 122, which is favorable for achieving the position fixing of the wire connecting portion on the housing assembly. The opening slot 122 has two opposite slot edge structures 124 and a slot top structure 125, the two slot edge structures 124 are used for limiting the width of the junction box 121, and the slot top structure 125 is used for axially limiting the junction box 121. The first sliding groove 123 is used for enabling the terminal box 121 to move along the axial direction of the rear shell 116 when the terminal box 121 is installed. The terminal block 121 further has an arc-shaped stopping groove 126, and the arc-shaped stopping groove 126 communicates with the two first sliding grooves 123. The slot top structure 125 of the open slot 122 is inserted into the arc-shaped stopping slot 126, thereby realizing the definition of the axial position of the splice case 121 on the rear shell 116. The junction box 121 is provided with two jacks parallel to the axial direction of the rear shell 116, and the number of the conductive terminals 120 is two; the conductive terminals 120 are strip-shaped structures, and the two strip-shaped structures are respectively inserted into two different insertion holes and can be fixed in the insertion holes by glue or other methods. One end of the conductive terminal 120 may be fixedly connected to the lead of the exciting coil 110 by welding, and the other end of the conductive terminal 120 is bent to form a bent end 127.

In this embodiment, after the above arrangement, the volume of the electromagnetic driving device can be made small, and the actual requirement can be met. The diameter of the electromagnetic driving device can be reduced to be between 2.8mm and 5.0mm, and specifically, the diameter of the electromagnetic driving device can be 2.9mm, 3.0mm, 3.1mm, 3.2mm, 3.4mm, 3.5mm, 3.6mm, 4.0mm, 4.2mm, 4.3mm, 4.5mm, 4.6mm, 4.7mm or 4.9 mm.

When the electromagnetic driving device is used, the electromagnetic driving device is connected with a power supply capable of switching the current direction. In this embodiment, the working principle of the electromagnetic driving device provided by the embodiment of the present invention is specifically described by taking the magnetic pole of the first magnet 103 facing one surface of the electromagnetic core 111 as the S pole, taking the magnetic pole generated by the exciting coil 110 facing one end of the first magnet 103 as the N pole after the forward current is applied to the exciting coil 110, and taking the magnetic pole generated by the exciting coil 110 facing one end of the first magnet 103 as the S pole after the reverse current is applied to the exciting coil 110 as the S pole:

the transition process of the push rod assembly from the separation state to the engagement state comprises the following steps:

referring to fig. 4, first, when the push rod assembly is kept in the separated state, the exciting coil 110 is not energized, and the push rod assembly receives a spring force Fs applied thereto by the spring, which is greater than a magnetic attraction force Fm of the non-energized electromagnetic mechanism to the push rod assembly. As shown in fig. 5, after the forward current is applied to the exciting coil 110, due to the attraction between the opposite magnetic poles, the magnetic attraction between the electromagnetic mechanism and the push rod destroys the stress balance state of the push rod assembly when the push rod assembly is in the separated state, and at this time, the magnetic attraction Fm of the energized electromagnetic mechanism to the push rod assembly can overcome the elastic force Fs of the spring to the push rod assembly, so that the push rod assembly moves toward the direction close to the electromagnetic mechanism; when the buffer piece 107 of the push rod assembly is in contact with the electromagnetic core 111 of the electromagnetic mechanism, the energization of the exciting coil 110 is stopped; the magnetic attraction force of the non-energized electromagnetic mechanism to the push rod assembly is greater than the elastic force of the compressed spring to the push rod assembly, so that the push rod assembly can maintain the engaged state. It should be noted that, when the buffer member 107 of the push rod assembly is in contact with the electromagnet core 111 of the electromagnet mechanism, the energization of the exciting coil 110 may be continued without stopping, but the forward current may be supplied; in addition, in order to ensure that the buffer member 107 of the push rod assembly can contact the electromagnet core 111 of the electromagnet mechanism, the energization time of the electromagnet mechanism may be made longer than the time required for the total displacement of the push rod assembly moving during the movement from the disengaged state to the engaged state.

Secondly, the transition process of the push rod assembly from the engagement state to the disengagement state:

referring to fig. 6, first, when the push rod assembly maintains the engaged state, the exciting coil 110 is not energized, and the push rod assembly receives a spring force Fs of the compressed spring to the push rod assembly, which is smaller than a magnetic attraction force Fm of the non-energized electromagnetic mechanism to the push rod assembly. Referring to fig. 7, after a reverse current is applied to the exciting coil 110, due to the mutual repulsion of like magnetic poles, the magnetic repulsion force between the energized electromagnetic mechanism and the push rod breaks the stress balance state of the push rod assembly in the engaged state, and at this time, the magnetic repulsion force Fm of the energized electromagnetic mechanism on the push rod assembly and the compressed spring act together on the elastic force Fs of the push rod assembly, so that the push rod assembly moves in a direction away from the electromagnetic mechanism; when the permanent magnet of the push rod assembly is stopped by the inner wall around the through hole of the front case 115, the energization of the exciting coil 110 is stopped; the push rod assembly receives the elasticity of the spring to the push rod assembly, and the magnetic attraction force of the electromagnetic mechanism which is not electrified to the push rod assembly is larger than that of the electromagnetic mechanism which is not electrified, so that the push rod assembly can keep a phase separation state. It should be noted that to ensure that the permanent magnet of the push rod assembly is stopped (i.e., contacted) by the inner wall around the through hole 128 of the front case 115, the energization time of the electromagnetic mechanism may be made longer than the time required for the total displacement of the push rod assembly moving during the movement from the engaged state to the disengaged state.

The electromagnetic driving device provided by the embodiment has the characteristic of small volume; the electromagnetic mechanism has short electrifying time, so that the heating of the electromagnetic driving device can be reduced, and the electromagnetic mechanism has the characteristic of low energy consumption. Adopt electromagnetic mechanism, push rod subassembly and spring to cooperate, messenger's push rod that can be timely stretches out or the action of retracting to the validity that the push rod stretches out or the action of retracting has been guaranteed.

Example two

Referring to fig. 22, a second embodiment of the present invention provides a braille display device, which includes the braille display module 200 provided in the first embodiment.

In an optional scheme of this embodiment, the braille display device further includes a housing 400 and a circuit board 300; the braille display module 200 and the circuit board 300 are mounted on the housing 400, and the circuit board 300 is electrically connected with the electromagnetic mechanism by contact. The housing 400 includes a bottom plate and four side plates 401 disposed around the bottom plate. The bottom plate has a partition plate 402 at the center thereof so that the case 400 has two receiving spaces. In each housing space, a plurality of braille display modules 200 may be mounted. The circuit board 300 may be fixed to the two side plates 401 of the housing 400 by screws, clips, or the like. The circuit board 300 is fixed to the two opposite surfaces of the partition plate 402 by means of through screws, snap-fitting, or the like, and the circuit board 300 has electrical connection contacts. After the plurality of braille display modules 200 are mounted, the bent end 127 of the electromagnetic driving device in each braille display module 200 is in contact connection with the electrical connection contacts.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Braille display module is characterized by comprising a plurality of display mechanisms, wherein each display mechanism comprises an electromagnetic driving device and an ejector rod;

2. A braille display module according to claim 1, characterized in that the display mechanism further comprises a top bead, the push rod having opposite first and second ends; the ejector rod is provided with an opposite extending end and an opposite abutting end; the second end of the push rod is provided with a curved surface structure, the abutting end of the ejector rod is provided with a curved surface structure, and both the curved surface structure of the second end of the push rod and the curved surface structure of the abutting end of the ejector rod can be tangent to the surface of the ejector bead so that the telescopic action of the push rod along the first direction is changed into the telescopic action of the ejector rod along the second direction through the ejector bead; the first direction is perpendicular to the second direction.

3. A braille display module according to claim 2, characterized in that it further comprises a module base, which is provided with a first channel and a second channel communicated with the first channel; the push rod is inserted into the first channel, the ejector rod is inserted into the second channel, and the ejector bead is positioned between the push rod and the ejector rod; the length extension direction of the first channel is parallel to the first direction, and the length extension direction of the second channel is parallel to the second direction.

4. A braille display module according to claim 3, characterized in that it further comprises a module upper cover fixedly connected with the module base; the display mechanism further comprises a return spring, a third channel correspondingly communicated with the second channel is formed in the upper cover of the module, the return spring is sleeved on the ejector rod, and the return spring is limited in the third channel and used for driving the ejector bead to move when the ejector rod retracts.

5. A braille display module according to claim 3 or 4, characterized in that a plurality of the display means are arranged at opposite sides of the module base and a plurality of the display means located at the same side of the module base are distributed in rows and columns;

6. A braille display module according to any preceding claim 2-4, characterized in that the electromagnetic drive means further comprise a spring;

the push rod is shiftable between the disengaged state and the engaged state;

7. A braille display module according to claim 6, characterized in that the push rod assembly further comprises a first magnet for making the push rod assembly magnetic; the first magnet is fixedly connected with the push rod.

8. A braille display module according to claim 7, characterized in that the push rod assembly further comprises a buffer element fixedly connected with the push rod, the first end facing the electromagnetic mechanism; the buffer piece is close to the first end, and the first magnet is far away from the first end.

9. A braille display device, characterized by comprising the braille display module according to any one of claims 1-8.

10. A braille display device according to claim 9, characterized by further comprising a housing and a circuit board; the Braille display module and the circuit board are installed on the shell, and the circuit board is electrically connected with the electromagnetic mechanism in a contact mode.