An information display device

Abstract

The application relates to an information display device which comprises a display screen, a base, a motor and a base, the display screen is installed on the base, and comprises adjusting assembly one, adjusting assembly two, adjusting assembly three and joint driving assembly; the adjusting assembly one, the adjusting assembly two and the adjusting assembly three are all multi-link mechanisms; the adjusting assembly one comprises a gear ring one; the adjusting assembly two comprises a gear ring two and a sleeve one; the adjusting assembly three comprises a gear ring three and a sleeve two; the axes of the gear ring one, the gear ring two, the gear ring three, the sleeve one and the sleeve two are on a straight line; the input end of the joint driving assembly is connected to the motor; the output end is respectively connected to the gear ring one, the gear ring two and the gear ring three; and the motor is installed on the base. Compared with the prior art, the application has the advantages of compact structure, wide application range and the like.

Description

Technical Field

[0001] This invention relates to display devices, and more particularly to an information display device. Background Technology

[0002] The application of big data has brought about the problem of information cocoons. Physical information displays still have a place because they have the characteristics of low delivery cost, indiscriminate delivery, and direct linkage with certain places that must be consumed offline. For example, the promotion of Party building work or other positive energy information, as well as the display of advertising information, all rely on such information display devices.

[0003] For example, Chinese patent CN218122957U discloses a Party building exhibition device, including a work box. A box body is fixedly connected to the upper surface of the work box, and a drive motor is fixedly connected to the inner bottom wall of the work box. A first gear is fixedly connected to the output end of the drive motor. A rotating column is rotatably connected to the inner wall of the work box through a bearing. A second gear is fixedly connected to the outer surface of the rotating column. The rotating column clamps the paper onto the exhibition board through a gripper. The coordinated use of the rotating rod, the first square plate, the first pin, the second square plate, and the rotating rod solves the problems of inconvenient exhibition and time-consuming replacement, thus achieving the effect of small exhibition space occupation and time-saving and labor-saving replacement. However, it does not involve the relevant content of multi-space angle exhibition information.

[0004] While some existing technologies offer the possibility of designing displays from multiple spatial angles, these technologies typically require multiple power sources, and the connection between the transmission components and the base occupies too much space, making it difficult to achieve a concealed design. Summary of the Invention

[0005] The purpose of this invention is to provide an information display device. On the one hand, the driving force output by the motor is distributed based on the joint drive component, thereby realizing the driving of three adjustment components by a single drive source. On the other hand, by designing an adjustment component with two connecting rods and setting the axes of gear ring one, gear ring two, gear ring three, sleeve one, and sleeve two on a straight line, the transmission part can be integrated into one, which is convenient for installation and more aesthetically pleasing.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] An information display device includes a display screen, a base, a motor, and a pedestal. The display screen is mounted on the base. It also includes adjustment components one, two, and three, and a combined drive component.

[0008] The adjustment assembly includes a first connecting rod, a second connecting rod, and a gear ring. One end of the first connecting rod is hinged to the base, and the other end is hinged to one end of the second connecting rod. The gear ring is fixed to the other end of the second connecting rod.

[0009] The second adjustment assembly includes a third connecting rod, a fourth connecting rod, a second gear ring, a first fixed base, and a first sleeve. One end of the third connecting rod is hinged to the base, and the other end is hinged to the fourth connecting rod. The first sleeve passes through the second connecting rod and is connected at both ends to the fourth connecting rod and the first fixed base, respectively. The first fixed base is disposed within a cavity formed by the first gear ring and the second connecting rod, and the second gear ring is mounted on the first fixed base.

[0010] The adjustment assembly three includes a connecting rod five, a connecting rod six, a sleeve two, a fixed seat two, and a gear ring three. One end of the connecting rod five is hinged to the base, and the other end is hinged to the connecting rod six. The sleeve two passes through the sleeve one and is fixed at both ends to the connecting rod six and the fixed seat two, respectively. The fixed seat two is disposed in the cavity formed by the gear ring two and the fixed seat one. The gear ring three is installed on the fixed seat two.

[0011] The axes of gear ring one, gear ring two, gear ring three, sleeve one, and sleeve two are on a straight line. The input end of the combined drive assembly is connected to the motor, and the output end is connected to gear ring one, gear ring two, and gear ring three respectively. The motor is mounted on the base.

[0012] Links 2, 4, and 6 have the same structure, each including a first rod and a second rod that are perpendicular to each other. One end of the first rod is provided with a hinge, and the other end is connected to the second rod. The planes formed by the second rods of links 2, 4, and 6 during their respective rotations are parallel to each other.

[0013] The hinge portion on the first rod is positioned from the end near the first rod to the end away from the first rod, oriented towards the axis away from the first sleeve.

[0014] The triangle formed by the connection points of the connecting rods 1, 3, and 5 with the base is an isosceles triangle.

[0015] The triangle formed by the connection points of the connecting rods 1, 3, and 5 with the base is an equilateral triangle.

[0016] The display screen is circular.

[0017] The display screen is detachably mounted in the base.

[0018] The combined drive assembly includes a drive gear ring one, a sliding sleeve one, a drive gear ring two, a sliding sleeve two, a drive gear ring three, a sliding sleeve three, a drive shaft, a guide key one, and a bearing.

[0019] The drive shaft is mounted on the base via bearings, and one end is connected to the motor. A guide key is located on the drive shaft, and a sliding sleeve is fitted onto the drive shaft. The sliding sleeve has a guide keyway that mates with the guide key. A drive gear ring is fixed to one end of the sliding sleeve and mates with the gear ring.

[0020] The sliding sleeve one is provided with a guide key two, and the sliding sleeve two is provided with a guide key groove two that mates with the guide key two. The sliding sleeve two is fitted onto the sliding sleeve one through the guide key two and the guide key groove two. The driving gear ring two is installed at one end of the sliding sleeve two and mates with the gear ring two.

[0021] The sliding sleeve 2 is provided with a guide key 3, and the sliding sleeve 3 is provided with a guide key groove 3 that cooperates with the guide key 3. The sliding sleeve 3 is fitted onto the sliding sleeve 2 through the guide key 3 and the guide key groove 3. The driving gear ring 3 is installed at one end of the sliding sleeve 3 and cooperates with the gear ring 1.

[0022] The combined drive assembly also includes shift fork one, shift fork two, shift fork three, electric cylinder one, electric cylinder two, and electric cylinder three, all of which are mounted on the base.

[0023] The sliding sleeve 1 is provided with a shift fork groove 1 that mates with the shift fork 1. The shift fork 1 is disposed in the shift fork groove 1 and is connected to the output end of the electric cylinder 1. The electric cylinder 1 drives the shift fork 1 to push and pull the sliding sleeve 1 to control the engagement and disengagement between the drive gear ring 1 and the gear ring 3.

[0024] The sliding sleeve 2 is provided with a shift fork groove 2 that mates with the shift fork 2. The shift fork 2 is located in the shift fork groove 2 and is connected to the output end of the electric cylinder 2. The electric cylinder 2 drives the shift fork 2 to push and pull the sliding sleeve 2 to control the engagement and disengagement between the drive gear ring 2 and the gear ring 2.

[0025] The sliding sleeve three is provided with a shift fork groove three that cooperates with the shift fork three. The shift fork three is located in the shift fork groove three and is connected to the output end of the electric cylinder three. The electric cylinder three drives the shift fork three to push and pull the sliding sleeve three to control the engagement and disengagement between the drive gear ring three and the gear ring one.

[0026] The gear rings 1, 2, 3, 1, 2, and 3 are gears or rubber friction wheels.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. On the one hand, the driving force output by the motor is distributed based on the joint drive component, thereby realizing the driving of three adjustment components by a single drive source. On the other hand, by designing an adjustment component with two connecting rods and setting the axes of gear ring one, gear ring two, gear ring three, sleeve one and sleeve two on a straight line, the transmission part can be integrated into one, which is convenient for installation and more aesthetically pleasing.

[0029] 2. By designing connecting rods two, four, and six as primarily composed of mutually perpendicular first and second rods, and ensuring that the planes formed by the second rods of connecting rods two, four, and six during their respective rotations are parallel, space can be saved, the device structure is more compact, and it can be adapted to scenarios with limited exhibition space.

[0030] 3. The hinge portion on the first rod is positioned from the end near the first rod to the end away from the first rod in a direction away from the axis of the sleeve, thereby preventing the adjustment component from being higher than the display screen and improving the information display effect.

[0031] 4. A specially designed combined drive assembly was adopted to achieve the step-by-step decomposition of the driving force output by the motor, thereby improving integration and reliability.

[0032] 5. The clutch control is achieved by using a shift fork, which has a simple and mature structure and high reliability and maintainability. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the present invention;

[0034] Figure 2 This is a front cross-sectional view of the present invention;

[0035] Figure 3 This is an isometric view of sliding sleeve one;

[0036] Figure 4 This is a front sectional view of the sliding sleeve 1;

[0037] Figure 5 This is a top view of the sliding sleeve.

[0038] Figure 6 This is the left view of the sliding sleeve.

[0039] Figure 7 This is the isometric view of sliding sleeve 2;

[0040] Figure 8 This is a front sectional view of the sliding sleeve 2;

[0041] Figure 9 This is a top view of the sliding sleeve 2;

[0042] Figure 10 This is the left view of the sliding sleeve 2;

[0043] Figure 11 This is the isometric view of sliding sleeve three;

[0044] Figure 12 This is a front sectional view of the sliding sleeve 3;

[0045] Figure 13 This is the left view of the sliding triplet.

[0046] Figure 14 for Figure 2 Enlarged view of the drive component section of the joint venture;

[0047] The components are as follows: 1. Display screen, 2. Mounting base, 3. Adjustment component one, 4. Adjustment component two, 5. Adjustment component three, 6. Combined drive component, 7. Motor, 8. Base, 31. Linkage one, 32. Linkage two, 33. Gear ring one, 41. Linkage three, 42. Linkage four, 43. Gear ring two, 44. Fixed base one, 45. Sleeve one, 51. Linkage five, 52. Linkage six, 53. Sleeve two, 54. Fixed base two, 55. Gear ring three, 61. Drive gear ring one, 62. Sliding sleeve one, 63. Drive gear ring two, 64. Sliding sleeve two, 65. Drive gear ring three, 66. Sliding sleeve three, 67. Drive shaft, 68. Guide key one, 69. Bearing, 610. Shift fork one, 611. Electric cylinder one, 612. Shift fork two, 613. Electric cylinder two, 614. Shift fork three, 615. Electric cylinder three. Detailed Implementation

[0048] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0049] An information display device is disclosed. This device can be used to display information. In some embodiments, it can display information on Party building and ideological and political propaganda. Of course, in other embodiments, it can also display other information.

[0050] Overall, such as Figure 1 and Figure 2 , Figure 14 As shown, the device of this application includes a display screen 1, a base 2, a motor 7, and a base 8. The display screen 1 is mounted on the base 2 and includes an adjustment component 3, an adjustment component 4, an adjustment component 5, and a combined drive component 6.

[0051] Adjustment assembly 3 includes connecting rod 31, connecting rod 32, and gear ring 33. One end of connecting rod 31 is hinged to base 2, and the other end is hinged to one end of connecting rod 32. Gear ring 33 is fixed to the other end of connecting rod 32.

[0052] Adjustment component 2 4 includes connecting rod 3 41, connecting rod 42, gear ring 2 43, fixed seat 1 44, and sleeve 1 45. One end of connecting rod 3 41 is hinged to base 2, and the other end is hinged to rod 42. Sleeve 1 45 passes through connecting rod 2 32, and its two ends are connected to connecting rod 42 and fixed seat 1 44 respectively. Fixed seat 1 44 is disposed in the cavity formed by gear ring 1 33 and connecting rod 2 32. Gear ring 2 43 is mounted on fixed seat 1 44.

[0053] Adjustment component 3 5 includes connecting rod 51, connecting rod 6 52, sleeve 2 53, fixed seat 2 54 and gear ring 3 55. One end of connecting rod 51 is hinged to base 2 and the other end is hinged to connecting rod 6 52. Sleeve 2 53 is set through sleeve 1 45 and its two ends are fixed to connecting rod 6 52 and fixed seat 2 54 respectively. Fixed seat 2 54 is set in the cavity formed by gear ring 2 43 and fixed seat 1 44. Gear ring 3 55 is installed on fixed seat 2 54.

[0054] The axes of gear ring 1 33, gear ring 2 43, gear ring 3 55, sleeve 1 45 and sleeve 2 53 are on a straight line. The input end of the combined drive assembly 6 is connected to the motor 7, and the output end is connected to gear ring 1 33, gear ring 2 43 and gear ring 3 55 respectively. The motor 7 is mounted on the base 8.

[0055] On the one hand, the driving force output by the motor 7 is distributed based on the joint drive component 6, thereby realizing the driving of three adjustment components by a single drive source. On the other hand, by designing an adjustment component with two connecting rods and setting the axes of gear ring 1 33, gear ring 2 43, gear ring 3 55, sleeve 1 45 and sleeve 2 53 on a straight line, the transmission part can be integrated into one, which is convenient for installation and more aesthetically pleasing.

[0056] Links 2 (32), 42 (42), and 52 (52) have identical structures, each including a first and second rod that are perpendicular to each other. One end of the first rod is hinged, and the other end connects to the second rod. Furthermore, the planes formed by the second rods of links 2 (32), 42 (42), and 52 during their respective rotations are parallel to each other. By designing links 2 (32), 42 (42), and 52 primarily as consisting of perpendicular first and second rods, and ensuring that the planes formed by the second rods of links 2 (32), 42 (42), and 52 during their respective rotations are parallel, space is saved, the device structure is more compact, and it is suitable for exhibition spaces with limited space.

[0057] In some embodiments, the hinge portion on the first rod is positioned from one end near the first rod to the end away from the first rod in a direction away from the axis of sleeve 45, thereby preventing the adjustment component from being higher than the display screen 1 and improving the information display effect.

[0058] In most embodiments, the triangle formed by the connection points of connecting rod 31, connecting rod 41, and connecting rod 51 with the base 2 is an isosceles triangle. In this embodiment, the triangle formed by the connection points of connecting rod 31, connecting rod 41, and connecting rod 51 with the base 2 is an equilateral triangle.

[0059] In most embodiments, the display screen 1 is circular and is detachably mounted in the base 2.

[0060] In most embodiments, motor 7 is any one of a stepper motor, servo motor, or torque motor.

[0061] The combined drive assembly 6 includes a drive gear ring 1 61, a sliding sleeve 1 62, a drive gear ring 2 63, a sliding sleeve 2 64, a drive gear ring 3 65, a sliding sleeve 3 66, a drive shaft 67, a guide key 1 68, and a bearing 69.

[0062] The drive shaft 67 is mounted on the base 8 via a bearing 69, and one end is connected to the motor 7. A guide key 68 is provided on the drive shaft 67, and a sliding sleeve 62 is fitted onto the drive shaft 67. Figures 3 to 6 As shown, the sliding sleeve 62 is provided with a guide keyway 622 that mates with the guide key 68. The drive gear ring 61 is fixed to one end of the sliding sleeve 62 and mates with the gear ring 55.

[0063] The sliding sleeve 62 is equipped with a guide key 623, such as Figures 7 to 10 As shown, the sliding sleeve 64 is provided with a guide keyway 642 that mates with the guide key 623. The sliding sleeve 64 is fitted onto the sliding sleeve 62 via the guide key 623 and the guide keyway 642. The drive gear ring 63 is installed at one end of the sliding sleeve 64 and mates with the gear ring 43.

[0064] Sliding sleeve 2 64 is equipped with guide key 3 643, such as Figures 11 to 13 As shown, the sliding sleeve 3 66 is provided with a guide keyway 3 662 that cooperates with the guide key 3 643. The sliding sleeve 3 66 is fitted onto the sliding sleeve 2 64 through the guide key 3 643 and the guide keyway 3 662. The drive gear ring 3 65 is installed at one end of the sliding sleeve 3 66 and cooperates with the gear ring 1 33.

[0065] The specially designed joint drive component 6 achieves the step-by-step decomposition of the driving force output by the motor 7, thereby improving integration and reliability.

[0066] The combined drive assembly 6 also includes shift fork 1 610, shift fork 2 612, shift fork 3 614, electric cylinder 1 611, electric cylinder 2 613, and electric cylinder 3 615, all of which are mounted on the base 8.

[0067] The sliding sleeve 62 is provided with a shift fork groove 621 that mates with the shift fork 610. The shift fork 610 is located in the shift fork groove 621 and is connected to the output end of the electric cylinder 611. The electric cylinder 611 drives the shift fork 610 to push and pull the sliding sleeve 62 to control the engagement and disengagement between the drive gear ring 61 and the gear ring 55.

[0068] The sliding sleeve 64 is provided with a shift fork groove 641 that mates with the shift fork 612. The shift fork 612 is located in the shift fork groove 641 and is connected to the output end of the electric cylinder 613. The electric cylinder 613 drives the shift fork 612 to push and pull the sliding sleeve 64 to control the engagement and disengagement between the drive gear ring 63 and the gear ring 43.

[0069] The sliding sleeve 366 is provided with a shift fork groove 3661 that cooperates with the shift fork 3614. The shift fork 3614 is located in the shift fork groove 361 and is connected to the output end of the electric cylinder 315. The electric cylinder 315 drives the shift fork 3614 to push and pull the sliding sleeve 366 to control the engagement and disengagement between the drive gear ring 365 and the gear ring 33.

[0070] Gear ring 1 (33), gear ring 2 (43), gear ring 3 (55), drive gear ring 1 (61), drive gear ring 2 (63), and drive gear ring 3 (65) are gears or rubber friction wheels.

[0071] Working principle: Motor 7 drives drive shaft 67 to rotate. Drive shaft 67 drives sliding sleeve 62 to rotate via guide key 1 68. Sliding sleeve 62 drives sliding sleeve 64 to rotate via guide key 2 623. Sliding sleeve 64 drives sliding sleeve 66 to rotate via guide key 3 643. Electric cylinder 611 drives shift fork 610 to push sliding sleeve 62, realizing the engagement of gear ring 1 61 and gear ring 3 55, thereby driving connecting rod 2 32 to rotate. Connecting rod 2 32, together with connecting rod 1 31, makes display screen 1 swing at a certain angle. Electric cylinder 611 drives shift fork 610 to pull back sliding sleeve 62, realizing the separation of gear ring 1 61 and gear ring 3 55. Similarly, electric cylinder 2 613 and electric cylinder 3 615 can be used to control the further swing of display screen 1. The rotation angles of connecting rods 2 (32), 4 (42), and 52 are controlled in coordination by electric cylinders 1 (611), 2 (613), and 3 (615), thereby realizing the posture of display screen 1 in space to adapt to the information display needs in different directions.

Claims

1. An information display device, comprising a display screen (1), a base (2), a motor (7), and a pedestal (8), wherein the display screen (1) is mounted on the base (2), characterized in that, It also includes adjustment component one (3), adjustment component two (4), adjustment component three (5) and joint drive component (6). The adjustment assembly 1 (3) includes a connecting rod 1 (31), a connecting rod 2 (32), and a gear ring 1 (33). One end of the connecting rod 1 (31) is hinged to the base (2), and the other end is hinged to one end of the connecting rod 2 (32). The gear ring 1 (33) is fixed to the other end of the connecting rod 2 (32). The second adjustment component (4) includes a third connecting rod (41), a fourth connecting rod (42), a second gear ring (43), a first fixed seat (44), and a first sleeve (45). One end of the third connecting rod (41) is hinged to the base (2), and the other end is hinged to the fourth connecting rod (42). The first sleeve (45) passes through the second connecting rod (32) and is connected at both ends to the fourth connecting rod (42) and the first fixed seat (44) respectively. The first fixed seat (44) is located in the cavity formed by the first gear ring (33) and the second connecting rod (32). The second gear ring (43) is mounted on the first fixed seat (44). The adjustment assembly three (5) includes a connecting rod five (51), a connecting rod six (52), a sleeve two (53), a fixed seat two (54), and a gear ring three (55). One end of the connecting rod five (51) is hinged to the base (2), and the other end is hinged to the connecting rod six (52). The sleeve two (53) passes through the sleeve one (45) and is fixed at both ends to the connecting rod six (52) and the fixed seat two (54) respectively. The fixed seat two (54) is located in the cavity formed by the gear ring two (43) and the fixed seat one (44). The gear ring three (55) is installed on the fixed seat two (54). The axes of the first gear ring (33), the second gear ring (43), the third gear ring (55), the first sleeve (45) and the second sleeve (53) are on a straight line. The input end of the combined drive assembly (6) is connected to the motor (7), and the output end is connected to the first gear ring (33), the second gear ring (43) and the third gear ring (55) respectively. The motor (7) is mounted on the base (8). The second (32), fourth (42) and sixth (52) of the connecting rods have the same structure, each including a first rod and a second rod that are perpendicular to each other. One end of the first rod is provided with a hinge and the other end is connected to the second rod. The planes formed by the second rods of the second rods of the second (32), fourth (42) and sixth (52) during their rotation are parallel to each other. The combined drive assembly (6) includes a drive gear ring one (61), a sliding sleeve one (62), a drive gear ring two (63), a sliding sleeve two (64), a drive gear ring three (65), a sliding sleeve three (66), a drive shaft (67), a guide key one (68), and a bearing (69). The drive shaft (67) is mounted on the base (8) via a bearing (69), and one end is connected to the motor (7). The guide key (68) is located on the drive shaft (67). The sliding sleeve (62) is fitted onto the drive shaft (67), and the sliding sleeve (62) has a guide keyway (622) that mates with the guide key (68). The drive gear ring (61) is fixed to one end of the sliding sleeve (62) and mates with the gear ring (55). The sliding sleeve 1 (62) is provided with a guide key 2 (623), and the sliding sleeve 2 (64) is provided with a guide key groove 2 (642) that cooperates with the guide key 2 (623). The sliding sleeve 2 (64) is fitted onto the sliding sleeve 1 (62) through the guide key 2 (623) and the guide key groove 2 (642). The driving gear ring 2 (63) is installed at one end of the sliding sleeve 2 (64) and cooperates with the gear ring 2 (43). The sliding sleeve 2 (64) is provided with a guide key 3 (643), and the sliding sleeve 3 (66) is provided with a guide key groove 3 (662) that cooperates with the guide key 3 (643). The sliding sleeve 3 (66) is fitted onto the sliding sleeve 2 (64) through the guide key 3 (643) and the guide key groove 3 (662). The driving gear ring 3 (65) is installed at one end of the sliding sleeve 3 (66) and cooperates with the gear ring 1 (33). The combined drive assembly (6) also includes shift fork one (610), shift fork two (612), shift fork three (614), electric cylinder one (611), electric cylinder two (613) and electric cylinder three (615), all of which are mounted on the base (8).

2. The information display device according to claim 1, characterized in that, The hinge portion on the first rod is arranged from the end near the first rod to the end away from the first rod in a direction away from the axis of sleeve 1 (45).

3. The information display device according to claim 1, characterized in that, The triangle formed by connecting the first (31), third (41) and fifth (51) links with the base (2) is an isosceles triangle.

4. An information display device according to claim 3, characterized in that, The triangle formed by connecting the first (31), third (41) and fifth (51) links with the base (2) is an equilateral triangle.

5. An information display device according to claim 1, characterized in that, The display screen (1) is circular.

6. The information display device according to claim 1, characterized in that, The display screen (1) is detachably mounted in the base (2).

7. An information display device according to claim 1, characterized in that, The sliding sleeve (62) is provided with a shift fork groove (621) that mates with the shift fork (610). The shift fork (610) is located in the shift fork groove (621) and is connected to the output end of the electric cylinder (611). The electric cylinder (611) drives the shift fork (610) to push and pull the sliding sleeve (62) to control the engagement and disengagement between the drive gear ring (61) and the gear ring (55). The sliding sleeve 2 (64) is provided with a shift fork groove 2 (641) that mates with the shift fork 2 (612). The shift fork 2 (612) is located in the shift fork groove 2 (641), and the shift fork 2 (612) is connected to the output end of the electric cylinder 2 (613). The electric cylinder 2 (613) drives the shift fork 2 (612) to push and pull the sliding sleeve 2 (64) to control the engagement and disengagement between the drive gear ring 2 (63) and the gear ring 2 (43). The sliding sleeve three (66) is provided with a shift fork groove three (661) that cooperates with the shift fork three (614). The shift fork three (614) is located in the shift fork groove three (661) and the shift fork three (614) is connected to the output end of the electric cylinder three (615). The electric cylinder three (615) drives the shift fork three (614) to push and pull the sliding sleeve three (66) to control the engagement and disengagement between the drive gear ring three (65) and the gear ring one (33).

8. An information display device according to claim 1, characterized in that, The gear rings 1 (33), 2 (43), 3 (55), 1 (61), 2 (63), and 3 (65) are gears or rubber friction wheels.

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