A flexible LED display module structure capable of being bent and folded

Abstract

The application discloses a bendable and foldable flexible LED display module structure and relates to the technical field of flexible LED display module structures.The installation box is internally connected with an installation plate in a sliding mode.A first threaded rod, a transmission plate, a transmission rod, an elastic plate and an arc column are cooperatively arranged to precisely adjust the arc of the flexible display module.In detail, the second transmission mechanism drives the first threaded rod to rotate, and the transmission plate moves along the threaded rod in the axial direction, and then the elastic plate is pushed to displace rearward in the middle part through the connecting rod and the transmission rod.Under the support of the arc column, the elastic plate generates a smooth concave arc, and simultaneously drives the flexible display module fixed thereon to deform synchronously.The design can switch the planar display mode into the curved surface display of any preset arc according to the playing content or the viewing angle requirement, and significantly enhances the immersion and visual impact of the picture.

Description

Technical Field

[0001] This invention relates to the field of flexible LED display module structure technology, and specifically to a flexible LED display module structure that can be bent and folded. Background Technology

[0002] With the rapid development of display technology, flexible LED displays, due to their bendability, thinness, and durability, are increasingly widely used in stage rentals, commercial exhibitions, large-scale events, and temporary installations. Compared to traditional rigid displays, flexible screens can adapt to various irregularly shaped mounting surfaces, providing a more immersive visual experience.

[0003] However, existing technologies still have some shortcomings in the practical application of flexible LED display modules. The curved shape of most flexible display modules is fixed during installation, and cannot be dynamically adjusted according to the content being played, the viewing angle, or the needs of the scene during use. For example, when it is necessary to switch from a flat mode to a curved mode with a specific curvature to enhance the visual immersion, existing devices often require manual replacement of the support structure or reinstallation. This operation is cumbersome and cannot achieve continuous and precise curvature changes, severely limiting the flexibility and expressiveness of the display effect.

[0004] Therefore, developing a display surface curvature that can be flexibly adjusted to improve the display effect has significant engineering application value and market prospects. Summary of the Invention

[0005] The purpose of this invention is to provide a flexible LED display module structure that can be bent and folded, so as to solve the problem that the curvature of the display surface of the existing flexible LED display module cannot be dynamically adjusted according to the playback content or viewing needs during use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bendable and foldable flexible LED display module structure, including a mounting box, a mounting plate slidably connected inside the mounting box, a moving mechanism provided on the mounting plate, the moving mechanism driving the mounting plate to move up and down, a transmission tube rotatably connected to the mounting plate, a driving mechanism driving the transmission tube to rotate horizontally on its outer surface, a support plate fixedly connected to the outer surface of the transmission tube, a first mounting bracket fixedly connected to the top of the support plate, a mounting shaft rotatably connected to the first mounting bracket, and the outer surface of the mounting shaft... A first transmission mechanism connected to a first mounting bracket is connected to the surface transmission connection. The first transmission mechanism is used to drive the mounting shaft to rotate. A second mounting bracket is fixedly connected to the outer surface of the mounting shaft. A first threaded rod is rotatably connected to both the first and second mounting brackets. A transmission plate is threadedly fitted to the outer surface of the first threaded rod. A transmission rod is fixedly connected to one side of the transmission plate via a connecting rod. An elastic plate is fixedly connected to one side of the transmission rod. Multiple flexible display modules are fixedly connected to the elastic plate. An arc-shaped column is fixedly connected to both the first and second mounting brackets. The outer surface of the arc-shaped column abuts against the back of the elastic plate.

[0007] The outer surface of the first threaded rod is connected to a second transmission mechanism, which is used to drive the first threaded rod to rotate.

[0008] Furthermore, the moving mechanism includes a first rotation drive component fixedly connected to the mounting box, the output end of the first rotation drive component being fixedly connected to a second threaded rod rotatably connected to the mounting box, the outer surface of the second threaded rod being threadedly engaged with the mounting plate, and a guide post fixedly connected to the mounting box being slidably connected to the mounting plate.

[0009] Furthermore, the first transmission mechanism includes a telescopic drive member fixedly connected to the first mounting bracket, and a transmission rack is fixedly connected to the output end of the telescopic drive member. A first transmission gear, which is fixedly sleeved with the mounting shaft, is meshed on one side of the transmission rack.

[0010] Furthermore, the second transmission mechanism includes a second rotation drive member fixedly connected to both the first mounting bracket and the second mounting bracket. The output end of the second rotation drive member is fixedly connected to a transmission shaft. A second transmission gear is fixedly sleeved on the outer surface of the transmission shaft. A third transmission gear is meshed on the outer surface of the second transmission gear. A fourth transmission gear is fixedly sleeved on the outer surface of the third transmission gear.

[0011] Furthermore, the driving mechanism includes a third rotational driving component fixedly connected to the mounting plate, the output end of the third rotational driving component is fixedly connected to a driving shaft, the outer surface of the driving shaft is fixedly sleeved with a first driving gear, and the outer surface of the first driving gear is meshed with a second driving gear fixedly sleeved with a transmission tube.

[0012] Furthermore, a blower is fixedly connected to the bottom of the mounting plate, a first connecting pipe is fixedly connected to the output end of the blower and rotatably connected to the transmission pipe, a second connecting pipe is fixedly connected to the top of the transmission pipe, a blower pipe is fixedly connected to the second connecting pipe, and multiple blower covers are fixedly connected to the outer surface of the blower pipe.

[0013] Furthermore, the elastic plate is provided with multiple heat dissipation holes.

[0014] Furthermore, the bottom of the mounting box is fixedly connected with multiple casters.

[0015] Compared with the prior art, the flexible LED display module structure that can be bent and folded provided by the present invention has the following beneficial effects:

[0016] By coordinating a first threaded rod, a transmission plate, a transmission rod, an elastic plate, and an arc-shaped column, precise adjustment of the curvature of the flexible display module is achieved. Specifically, the second transmission mechanism drives the first threaded rod to rotate, causing the transmission plate to move axially along the threaded rod. This, in turn, pushes the center of the elastic plate backward via the connecting rod and the transmission rod. Supported by the arc-shaped column, the elastic plate produces a smooth concave curvature, simultaneously deforming the flexible display module fixed to it. This design allows switching from a flat display mode to a curved surface display with any preset curvature, depending on the content being played or the viewing angle, significantly enhancing the immersiveness and visual impact of the image. Furthermore, the drive mechanism can rotate the transmission tube and support plate horizontally, enabling the display screen to rotate dynamically during playback, further enhancing the attractiveness and coverage of the displayed content. After use, the elastic plate can be reset by reversing the operation, and the first transmission mechanism drives the second mounting bracket to fold to one side of the first mounting bracket. The entire assembly is then stored in the mounting box via a moving mechanism, and the universal wheels facilitate convenient movement and transportation. This structure not only enables automated curvature adjustment and rotation display of the flexible screen, but also has an efficient folding and storage function, which greatly reduces the space occupied when the equipment is idle, making it easy to carry and maintain. It is suitable for various mobile display scenarios such as stage rental, exhibition display, and commercial advertising.

[0017] By fixing a blower to the bottom of the mounting plate and sequentially connecting it to a first connecting pipe, a transmission pipe, a second connecting pipe, a blower pipe, and multiple blower hoods, while simultaneously creating heat dissipation holes on the flexible plate, a complete air-cooling circulation channel is formed. When the flexible display module generates heat during prolonged operation, the blower activates, and cool air is delivered through the transmission pipe to each blower hood, blowing evenly onto the surface of the flexible plate. The cool air then directly contacts the back of the flexible display module through the heat dissipation holes, achieving efficient convection heat dissipation. This design solves the problem of traditional heat dissipation structures being difficult to fit and having low heat dissipation efficiency due to bending and deformation of flexible screens, avoiding brightness attenuation, color shift, or shortened lifespan caused by heat accumulation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a first perspective view of the external structure of the present invention;

[0020] Figure 2 This is a second perspective view of the external structure of the present invention;

[0021] Figure 3 This is a first perspective view of the internal structure of the present invention;

[0022] Figure 4 This is a second perspective view of the internal structure of the present invention;

[0023] Figure 5 For the present invention Figure 1 Enlarged view of A in the middle;

[0024] Figure 6 For the present invention Figure 3 Enlarged view of B in the middle;

[0025] Figure 7 For the present invention Figure 4 A magnified view of C.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Mounting box; 2. Mounting plate; 3. Transmission pipe; 4. Support plate; 5. First mounting bracket; 6. Mounting shaft; 7. Second mounting bracket; 8. First threaded rod; 9. Transmission plate; 10. Transmission rod; 11. Elastic plate; 12. Flexible display module; 13. Arc-shaped column; 21. First rotation drive component; 22. Second threaded rod; 23. Guide column; 31. Telescopic drive component; 32. Transmission rack; 33. First transmission gear; 41. Second rotation drive component; 42. Transmission shaft; 43. Second transmission gear; 44. Third transmission gear; 45. Fourth transmission gear; 51. Third rotation drive component; 52. Drive shaft; 53. First drive gear; 54. Second drive gear; 61. Blower; 62. First connecting pipe; 63. Second connecting pipe; 64. Blower pipe; 65. Blower cover. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] Please see Figures 1 to 7 As shown, this invention provides a flexible LED display module structure that can be bent and folded, including a mounting box 1. A mounting plate 2 is slidably connected inside the mounting box 1. A moving mechanism is provided on the mounting plate 2 to drive the mounting plate 2 to move up and down. A transmission tube 3 is rotatably connected to the mounting plate 2. A driving mechanism is driven to the outer surface of the transmission tube 3 to drive the transmission tube 3 to rotate horizontally. A support plate 4 is fixedly connected to the outer surface of the transmission tube 3. A first mounting bracket 5 is fixedly connected to the top of the support plate 4. A mounting shaft 6 is rotatably connected to the first mounting bracket 5. A first transmission mechanism connected to the first mounting bracket 5 is driven to the outer surface of the mounting shaft 6 to drive the mounting shaft 6 to rotate. A second... Mounting bracket 7, first mounting bracket 5 and second mounting bracket 7 are rotatably connected to first threaded rods 8, the outer surface of first threaded rod 8 is threaded with transmission plate 9, one side of transmission plate 9 is fixedly connected to transmission rod 10 through connecting rod, one side of transmission rod 10 is fixedly connected to elastic plate 11, elastic plate 11 is a thin metal plate or polymer elastic plate with elastic recovery capability, its back side cooperates with transmission rod 10 and arc-shaped column 13, can generate a smooth concave arc when subjected to force and rely on its own elasticity to recover straightness, multiple flexible display modules 12 are fixedly connected to elastic plate 11, flexible display modules 12 are fixed to elastic plate 11 by bolts, and arc-shaped column 13 is fixedly connected to both first mounting bracket 5 and second mounting bracket 7, the outer surface of arc-shaped column 13 abuts against the back side of elastic plate 11;

[0031] The outer surface of the first threaded rod 8 is connected to a second transmission mechanism, which is used to drive the first threaded rod 8 to rotate.

[0032] The bottom of the mounting box 1 is fixedly connected with multiple casters, which facilitate the movement of the mounting box 1.

[0033] The moving mechanism includes a first rotation drive component 21 fixedly connected to the mounting box 1. The first rotation drive component 21 is a servo motor, which is controlled by a PLC programming program. The servo motor can be controlled to rotate forward and backward and rotate at different angles. The output end of the first rotation drive component 21 is fixedly connected to a second threaded rod 22 rotatably connected to the mounting box 1. The outer surface of the second threaded rod 22 is threadedly engaged with the mounting plate 2. A guide post 23 fixedly connected to the mounting box 1 is slidably connected to the mounting plate 2. The first rotation drive component 21 drives the second threaded rod 22 to rotate, and the second threaded rod 22 drives the mounting plate 2 to move up and down.

[0034] The first transmission mechanism includes a telescopic drive component 31 fixedly connected to the first mounting bracket 5. The telescopic drive component 31 is an electric telescopic rod or an electric hydraulic rod. A transmission rack 32 is fixedly connected to the output end of the telescopic drive component 31. A first transmission gear 33, which is fixedly sleeved with the mounting shaft 6, is meshed on one side of the transmission rack 32. The telescopic drive component 31 drives the transmission rack 32 to move, and the transmission rack 32 drives the first transmission gear 33 and the mounting shaft 6 to rotate.

[0035] The second transmission mechanism includes a second rotation drive component 41 fixedly connected to both the first mounting bracket 5 and the second mounting bracket 7. The second rotation drive component 41 is a servo motor, which is controlled by a PLC programming program to control the forward and reverse rotation and rotation angle of the servo motor. A transmission shaft 42 is fixedly connected to the output end of the second rotation drive component 41. A second transmission gear 43 is fixedly sleeved on the outer surface of the transmission shaft 42. A third transmission gear 44 is meshed on the outer surface of the second transmission gear 43. A fourth transmission gear 45 is meshed on the outer surface of the third transmission gear 44 and fixedly sleeved with the first threaded rod 8. The second rotation drive component 41 drives the transmission shaft 42 to rotate. The transmission shaft 42 drives the third transmission gear 44 to rotate through the second transmission gear 43. The third transmission gear 44 drives the two fourth transmission gears 45 to rotate. The fourth transmission gears 45 drive the first threaded rod 8 to rotate.

[0036] The drive mechanism includes a third rotation drive component 51 fixedly connected to the mounting plate 2. The third rotation drive component 51 is a servo motor, which is controlled by a PLC programming program. The servo motor can be controlled to rotate forward and backward and rotate at different angles. The output end of the third rotation drive component 51 is fixedly connected to a drive shaft 52. A first drive gear 53 is fixedly sleeved on the outer surface of the drive shaft 52. A second drive gear 54, which is fixedly sleeved on the outer surface of the first drive gear 53, is meshed with the outer surface of the first drive gear 53. The third rotation drive component 51 drives the drive shaft 52 to rotate, and the drive shaft 52 drives the transmission tube 3 to rotate through the first drive gear 53 and the second drive gear 54.

[0037] The mounting box 1 is moved to the desired display position using casters. Then, a moving mechanism moves the mounting plate 2 inside the mounting box 1 upwards. The mounting plate 2 moves the first mounting bracket 5, mounting shaft 6, and second mounting bracket 7 upwards, causing them to move out of the mounting box 1. The first transmission mechanism then rotates the mounting shaft 6, which in turn rotates the second mounting bracket 7. The second mounting bracket 7 then rotates the elastic plate 11 and the flexible display module 12, aligning the flexible display module 12 on the first and second mounting brackets and unfolding the display screen. For better display, when the concave curvature of the flexible screen 12 needs adjustment, the second transmission mechanism... The mechanism drives the first threaded rod 8 to rotate, which in turn drives the transmission plate 9 to move. The transmission plate 9 then drives the transmission rod 10 to move via the connecting rod. At this time, the transmission rod 10 drives the elastic plate 11 to move. The elastic plate 11 moves backward from the middle position, and simultaneously, in conjunction with the arc-shaped column 13, the elastic plate 11 is concave inward, creating a concave arc. Simultaneously, the elastic plate 11 causes the flexible display module 12, which is fixed on the surface, to deform, resulting in an inward concave arc deformation. This allows the flexible display module 12 to achieve precise arc deformation within its deformation range (within the arc range of the flexible display module 12's deformation), greatly improving the display effect of the flexible display module 12 on the played image.

[0038] While displaying the playback screen, the drive mechanism can rotate the transmission tube 3, which in turn rotates the mounting plate 2. The mounting plate 2 then rotates the first mounting bracket 5 and the second mounting bracket 7, thereby rotating the display screen 12 and further improving the display effect of the content played on the display screen 12. After use, the second transmission mechanism drives the first threaded rod 8 to rotate, restoring the elastic plate 11 and the flexible display module 12 to their initial positions. Then, the first transmission mechanism drives the mounting shaft 6 to rotate, causing the second mounting bracket 7 to fold to one side of the first mounting bracket 5, thus folding the display module and reducing the space occupied by the display module. Subsequently, the moving mechanism drives the mounting plate 2 and the first mounting bracket 5 to move downwards, allowing the first mounting bracket 5 and the second mounting bracket 7 to enter the mounting box 1. The top of the mounting box 1 is then covered, thus achieving automatic folding and storage of the display module, making it convenient for users to carry the display module.

[0039] Example 2

[0040] Based on Example 1, please refer to Figure 4 and Figure 7 As shown, a blower 61 is fixedly connected to the bottom of the mounting plate 2. The blower 61 is a hair dryer. The output end of the blower 61 is fixedly connected to a first connecting pipe 62 that is rotatably connected to the transmission pipe 3. A rotating sealing ring is provided between the transmission pipe 62 and the first connecting pipe 62. A second connecting pipe 63 is fixedly connected to the top of the transmission pipe 3. A blower pipe 64 is fixedly connected to the second connecting pipe 63. Multiple blower covers 65 are fixedly connected to the outer surface of the blower pipe 64. Multiple heat dissipation holes are provided on the elastic plate 11.

[0041] During the display process of the flexible display module 12, the first connecting pipe 62 is blown by the air blowing device 61. The first connecting pipe 62 blows air into the second connecting pipe 63 through the transmission pipe 3. Then, the second connecting pipe 63 sends air into multiple air blowing hoods 65 through the air blowing pipe 64. The multiple air blowing hoods 65 then blow air onto the surface of the elastic plate 11. The air then blows air through the heat dissipation holes on the elastic plate 11 to dissipate heat from the flexible display module 12, reducing the impact of heat on the flexible display module 12, further improving the service life of the flexible display module 12, and also improving the stability of use.

[0042] Working principle:

[0043] The mounting box 1 is moved to the desired position by the casters. The first rotating drive component 21 in the moving mechanism drives the second threaded rod 22 to rotate, so that the mounting plate 2 moves upward under the guidance of the guide post 23, and drives the first mounting bracket 5, the mounting shaft 6 and the second mounting bracket 7 to move out of the mounting box 1.

[0044] Next, the telescopic drive component 31 in the first transmission mechanism drives the transmission rack 32 to move, causing the first transmission gear 33 and the mounting shaft 6 to rotate, which in turn drives the second mounting frame 7 to rotate, allowing the flexible display module 12 on the first mounting frame 5 and the second mounting frame 7 to align and unfold. If it is necessary to adjust the concave display curvature of the flexible display module 12, the second rotation drive component 41 in the second transmission mechanism drives the transmission shaft 42 to rotate, which is transmitted through the second transmission gear 43, the third transmission gear 44 and the fourth transmission gear 45, causing the first threaded rod 8 to rotate, which drives the transmission plate 9, the transmission rod 10 and the elastic plate 11 to move, which, in conjunction with the arc-shaped column 13, causes the elastic plate 11 to produce a concave curvature, causing the flexible display module 12 to deform precisely. During display, the third rotation drive component 51 in the drive mechanism drives the drive shaft 52 to rotate, which is transmitted through the first drive gear 53 and the second drive gear 54, causing the transmission tube 3 to rotate, which in turn drives the mounting plate 2, the first mounting frame 5 and the second mounting frame 7 to rotate, and causes the display screen 12 to rotate.

[0045] After use, the second transmission mechanism restores the elastic plate 11 and the flexible display module 12 to their initial positions, the first transmission mechanism folds the second mounting bracket 7 to one side of the first mounting bracket 5, and the moving mechanism moves the mounting plate 2 and the first mounting bracket 5 downwards, allowing the first mounting bracket 5 and the second mounting bracket 7 to enter the mounting box 1 and cover the top.

[0046] When the flexible display module 12 is in use, the air blowing device 61 blows air onto the surface of the elastic plate 11 through the first connecting pipe 62, the transmission pipe 3, the second connecting pipe 63, the air blowing pipe 64 and the air blowing cover 65, and the air blows through the heat dissipation holes of the elastic plate 11 to dissipate heat from the flexible display module 12.

[0047] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A flexible LED display module structure capable of being bent and folded, characterized in that, The system includes a mounting box (1), a mounting plate (2) slidably connected inside the mounting box (1), a moving mechanism on the mounting plate (2) for moving the mounting plate (2) up and down, a transmission tube (3) rotatably connected to the mounting plate (2), a driving mechanism for driving the transmission tube (3) to rotate horizontally on the outer surface of the transmission tube (3), a support plate (4) fixedly connected to the outer surface of the transmission tube (3), a first mounting bracket (5) fixedly connected to the top of the support plate (4), a mounting shaft (6) rotatably connected to the first mounting bracket (5), and a first transmission mechanism connected to the first mounting bracket (5) for driving the outer surface of the mounting shaft (6). The transmission mechanism is used to drive the mounting shaft (6) to rotate. The outer surface of the mounting shaft (6) is fixedly connected to a second mounting bracket (7). The first mounting bracket (5) and the second mounting bracket (7) are both rotatably connected to a first threaded rod (8). The outer surface of the first threaded rod (8) is threadedly fitted with a transmission plate (9). One side of the transmission plate (9) is fixedly connected to a transmission rod (10) through a connecting rod. One side of the transmission rod (10) is fixedly connected to an elastic plate (11). Multiple flexible display modules (12) are fixedly connected to the elastic plate (11). The first mounting bracket (5) and the second mounting bracket (7) are both fixedly connected to an arc-shaped column (13). The outer surface of the arc-shaped column (13) abuts against the back of the elastic plate (11). The outer surface of the first threaded rod (8) is connected to a second transmission mechanism, which is used to drive the first threaded rod (8) to rotate.

2. The flexible LED display module structure that can be bent and folded according to claim 1, characterized in that, The moving mechanism includes a first rotating drive (21) fixedly connected to the mounting box (1), and a second threaded rod (22) fixedly connected to the mounting box (1) at the output end of the first rotating drive (21). The outer surface of the second threaded rod (22) is threadedly engaged with the mounting plate (2). A guide post (23) fixedly connected to the mounting box (1) is slidably connected on the mounting plate (2).

3. The flexible LED display module structure that can be bent and folded according to claim 1, characterized in that, The first transmission mechanism includes a telescopic drive member (31) fixedly connected to the first mounting bracket (5). The output end of the telescopic drive member (31) is fixedly connected to a transmission rack (32). One side of the transmission rack (32) is meshed with a first transmission gear (33) fixedly sleeved with the mounting shaft (6).

4. The flexible LED display module structure that can be bent and folded according to claim 1, characterized in that, The second transmission mechanism includes a second rotation drive (41) fixedly connected to both the first mounting bracket (5) and the second mounting bracket (7). The output end of the second rotation drive (41) is fixedly connected to a transmission shaft (42). A second transmission gear (43) is fixedly sleeved on the outer surface of the transmission shaft (42). A third transmission gear (44) is meshed on the outer surface of the second transmission gear (43). A fourth transmission gear (45) is meshed on the outer surface of the third transmission gear (44) and is fixedly sleeved with the first threaded rod (8).

5. The flexible LED display module structure that can be bent and folded according to claim 1, characterized in that, The drive mechanism includes a third rotating drive member (51) fixedly connected to the mounting plate (2). The output end of the third rotating drive member (51) is fixedly connected to a drive shaft (52). A first drive gear (53) is fixedly sleeved on the outer surface of the drive shaft (52). A second drive gear (54) is fixedly sleeved on the outer surface of the first drive gear (53) and meshed with the transmission tube (3).

6. The flexible LED display module structure that can be bent and folded according to claim 1, characterized in that, A blower (61) is fixedly connected to the bottom of the mounting plate (2). A first connecting pipe (62) that is rotatably connected to the output end of the blower (61) is fixedly connected to the transmission pipe (3). A second connecting pipe (63) is fixedly connected to the top of the transmission pipe (3). A blower pipe (64) is fixedly connected to the second connecting pipe (63). A plurality of blower covers (65) are fixedly connected to the outer surface of the blower pipe (64).

7. The flexible LED display module structure that can be bent and folded according to claim 1, characterized in that, The elastic plate (11) has multiple heat dissipation holes.

8. The flexible LED display module structure that can be bent and folded according to claim 1, characterized in that, The bottom of the mounting box (1) is fixedly connected with multiple casters.

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