A variable sign

Abstract

The utility model discloses a variable sign relates to traffic sign technical field, including frame, drive assembly, first signboard and second signboard, drive assembly is fixed in the frame, is set up with the window on the frame, can see first signboard or second signboard through the window, first signboard is fixed in the frame, and second signboard is fixed with drive assembly, when drive assembly drives second signboard to move, can see the change of sign from the window, the advantage is that the physical switching of sign content can be realized, reduces energy consumption and improves the identification definition under different illumination conditions while avoiding the display defect brought by LED light source.

Description

Technical Field

[0001] This utility model relates to the field of traffic sign technology, and in particular to a variable sign. Background Technology

[0002] In the field of road traffic management, signs are used to convey key traffic information to drivers, such as speed limits, lane instructions, and road condition warnings ahead. They are an important infrastructure to ensure driving safety and traffic order. In order to meet the needs of displaying different sign content at different times or under different weather conditions, traffic management departments usually need to set up variable signs with pattern or information switching functions.

[0003] Chinese utility model patent CN221798222U discloses an ultra-thin variable speed limit sign that solves the problems of existing bulky and technically complex variable speed limit signs. It is also convenient to use and install, and reduces power consumption. The original box structure has been improved to a flat plate structure, and the shape has been changed from square to a circle suitable for the sign structure. This utility model is composed of various ultra-thin LED light strips of different shapes and colors. The sign uses red arcs, white semicircles, and white rectangles of different shapes, combined with white non-semicircular light strips, to form red pixel circles, white pixel circles, and two-and-a-half-digit seven-segment controllable strokes from the white circular pixels. However, this design of variable speed limit signs has the following shortcomings: First, after long-term operation, the LED beads and their supporting switching power supply modules show obvious signs of aging, and the output voltage is prone to fluctuations, resulting in inconsistent brightness of each LED bead and affecting the overall recognizability of the sign content; Second, due to the limitations of the LED light-emitting principle and pixel spacing, the content displayed on this type of sign appears dark under strong sunlight, while at night or in low-light environments, the high-brightness LEDs are prone to producing glare, making it difficult to balance display comfort and clarity under different lighting conditions; Third, this type of sign has complex internal circuits and a large number of components, resulting in high energy consumption during long-term operation, a relatively high failure rate, and expensive maintenance costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a variable sign that can physically switch the sign content, while avoiding the display defects caused by LED light sources, reducing energy consumption and improving the recognition clarity under different lighting conditions.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is a variable sign, including a frame, a driving component, a first sign and a second sign. The driving component is fixed in the frame, and a window is opened on the frame. The first sign or the second sign can be seen through the window. The first sign is fixed in the frame, and the second sign is fixed to the driving component. When the driving component moves the second sign, the change of the sign can be seen from the window.

[0006] Furthermore, both the first sign and the second sign are composed of a single plate. A first mounting bracket and a second mounting bracket are fixed within the frame. The drive assembly is fixed on the first mounting bracket. The first sign is fixed on the second mounting bracket and faces the window. When the second sign is located at the window position, the second sign is in front of the first sign.

[0007] Furthermore, the drive assembly includes a ball screw fixed on the first mounting bracket, a nut screwed onto the ball screw, a second sign fixed to the nut, and the left and right sides of the second sign sliding up and down within the frame via a first sliding assembly.

[0008] Furthermore, the first sliding assembly includes a slide groove and a roller, the slide groove is fixed on the second mounting bracket, the roller is slidably connected in the slide groove, and the second sign is fixed to the roller.

[0009] Furthermore, both the first and second signs are composed of two panels joined together. A first mounting bracket, a second mounting bracket, and a third mounting bracket are fixed within the frame. The upper half of the first sign is fixed to the third mounting bracket, and the upper half of the second sign is fixed to the drive assembly. The upper half of the first sign is located behind the upper half of the second sign. The lower half of the first sign is fixed to the third mounting bracket, and the lower half of the second sign is connected to the upper half of the second sign. The lower half of the first sign is located behind the lower half of the second sign.

[0010] Furthermore, the drive assembly includes a ball screw fixed on the first mounting bracket, a nut screwed onto the ball screw, a second sign fixed to the nut, and the left and right sides of the second sign sliding up and down within the frame via a second sliding assembly.

[0011] Furthermore, the second sliding assembly includes a slide rail and a slider, the slide rail being fixed on the second mounting bracket, the slider being slidably connected to the slide rail, and the second sign being fixed to the slider.

[0012] Furthermore, an upper limit sensor and a lower limit sensor are fixed on the second mounting bracket. The upper limit sensor corresponds to the upper end of the slide groove, and the lower limit sensor corresponds to the lower end of the slide groove.

[0013] Furthermore, an upper limit sensor and a lower limit sensor are fixed on the second mounting bracket. The upper limit sensor corresponds to the upper end of the slide rail, and the lower limit sensor corresponds to the lower end of the slide rail.

[0014] Compared with the prior art, the advantages of this utility model are that it adopts a mechanical switching method to realize the change of sign content. The second sign is moved by the driving component, so that different sign surfaces are presented at the frame window. This avoids the problem of uneven brightness caused by power supply aging of LED light source, and improves the recognition clarity and visual comfort under various lighting conditions. Moreover, the sign content switching is only performed by the driving component when it is necessary to change the displayed information. The sign itself does not need to be continuously powered to emit light, which greatly reduces energy consumption and is more energy-saving and environmentally friendly. Attached Figure Description

[0015] Figure 1 This is a perspective view of Embodiment 1 of the present utility model; Figure 2 This is a perspective view of the first sliding component of Embodiment 1 of the present invention; Figure 3 This is an exploded view of Embodiment 1 of the present invention; Figure 4 This is a perspective view of Embodiment 2 of the present invention; Figure 5 This is a perspective view of the internal structure of Embodiment 2 of the present invention; Figure 6 This is a schematic diagram showing the connection relationship between the second sign and the second sliding component in Embodiment 2 of this utility model; Figure 7 This is a schematic diagram of the installation of the first signboard in Embodiment 2 of this utility model. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] Example 1, as Figures 1 to 3As shown, a variable sign includes a frame 1, a drive assembly 2, a first sign 3, and a second sign 4. The drive assembly 2 is fixed inside the frame 1. A window 11 is provided on the frame 1, through which either the first sign 3 or the second sign 4 can be seen. The first sign 3 is fixed inside the frame 1, and the second sign 4 is fixed to the drive assembly 2. When the drive assembly 2 moves the second sign 4, the change of the sign can be seen through the window 11. When both the first sign 3 and the second sign 4 are composed of a single plate, a first mounting bracket 51 and a second mounting bracket 52 are fixed inside the frame 1. Mounting bracket 52, drive assembly 2 is fixed on first mounting bracket 51, first sign 3 is fixed on second mounting bracket 52 and directly opposite window 11. When second sign 4 is in the position of window 11, second sign 4 is in front of first sign 3. Direct switching of sign content is achieved by the second sign 4 covering the first sign 3. The switching method is simple and reliable. Drive assembly 2 includes ball screw 21 fixed on first mounting bracket 51, nut 22 screwed on ball screw 21, nut 22 is fixed to second sign 4 through first connector 23. The ball screw drive has the advantages of high positioning accuracy, smooth movement, and high transmission efficiency, which can ensure that the second sign 4 moves accurately and in place during the switching process, while providing sufficient driving force to ensure the stable lifting and lowering of the sign. The left and right sides of the second sign 4 slide up and down within the frame 1 through the first sliding assembly 6. The first sliding assembly 6 includes a slide groove 61 and a roller 62. The slide groove 61 is fixed on the second mounting bracket 52, and the roller 62 is slidably connected within the slide groove 61. The second sign 4 is fixed to the roller 62. The rolling friction generated by the roller 62 rolling within the slide groove 61 is relatively... The sliding friction resistance is smaller, which can ensure the smoothness of the sliding process of the second sign 4, reduce mechanical wear, and thus extend the service life of the sliding component. The upper limit sensor 71 and the lower limit sensor 72 are fixed on the second mounting bracket 52. The upper limit sensor 71 corresponds to the upper end of the slide 61, and the lower limit sensor 72 corresponds to the lower end of the slide 61. The upper limit sensor 71 is used to detect whether the second sign 4 has risen to the correct position, and the lower limit sensor 72 is used to detect whether the second sign 4 has fallen to the correct position. The setting of the two sensors realizes the control of the stroke of the second sign 4.

[0018] In the initial state, the second sign 4 is located at the lower position within the frame 1. At this time, the window 11 faces the first sign 3, and the sign content on the first sign 3 can be directly seen through the window 11. When it is necessary to change the displayed content (e.g., adjusting the speed limit value for traffic control), the ball screw 21 starts to rotate under the drive of the motor 24, driving the nut 22 to move upward along the ball screw 21. The second sign 4, which is fixed to the nut 22, slides upward along the slide groove 61. The roller 62 rolls in the slide groove 61 to ensure smooth movement of the second sign 4. When the second sign 4 rises to the position of the window 11, the second sign 4 is in front of the first sign 3. At this time, the sign content on the second sign 4 can be seen through the window 11. The upper limit sensor 71 detects that the second sign 4 has risen to the correct position and controls the ball screw 21 to stop rotating, thus completing the switching.

[0019] Example 2, as Figures 4 to 7 As shown, a variable sign includes a frame 1, a drive assembly 2, a first sign 3, and a second sign 4. The drive assembly 2 is fixed inside the frame 1. A window 11 is provided on the frame 1, through which the first sign 3 or the second sign 4 can be seen. The first sign 3 is fixed inside the frame 1, and the second sign 4 is fixed to the drive assembly 2. When the drive assembly 2 moves the second sign 4, the change of the sign can be seen through the window 11. Both the first sign 3 and the second sign 4 are composed of two panels joined together. A first mounting bracket 51, a second mounting bracket 52, and a third mounting bracket 53 are fixed inside the frame 1. The upper half of the first sign 3 is fixed to the third mounting bracket 53, and the upper half of the second sign 4 is fixed to the drive assembly 2. The upper half of the first sign 3 is located behind the upper half of the second sign 4. The lower half of the first sign 3 is fixed to the third mounting bracket 53, and the lower half of the second sign 4 is connected to the upper half of the second sign 4. Located behind the lower half of the second sign 4, the drive assembly 2 includes a ball screw 21 fixed on the first mounting bracket 51. A nut 22 is screwed onto the ball screw 21, and the second sign 4 is fixed on the nut 22. The left and right sides of the second sign 4 slide up and down within the frame 1 via the second sliding assembly 8. The second sliding assembly 8 includes a slide rail 81 and a slider 82. The slide rail 81 is fixed on the second mounting bracket 52, and the slider 82 is slidably connected to the slide rail 81. The second sign 4 and the slider 82 are fixed together by the second connector 25. An upper limit sensor 71 and a lower limit sensor 72 are fixed on the second mounting bracket 52. The upper limit sensor 71 corresponds to the upper end of the slide rail 81, and the lower limit sensor 72 corresponds to the lower end of the slide rail 81. The double-plate splicing structure in this embodiment enables the sign to achieve a larger display area or more complex content presentation within a limited frame space. The synchronous movement of the upper and lower half plates ensures the integrity of the sign content during switching, while also improving the utilization rate of the internal space of the frame.

[0020] In the initial state, the upper half of the second sign 4 is located behind the lower half of the first sign 3, and the lower half of the second sign 4 is located in the lower position within the frame 1. At this time, the window 11 displays the first sign 3, and the sign content on the first sign 3 can be directly seen through the window 11. When it is necessary to change the displayed content (e.g., adjusting the lane driving direction for traffic control), the ball screw 21 starts to rotate under the drive of the motor 24, driving the nut 22 to move upward along the ball screw 21. The second sign 4, which is fixed to the nut 22, slides upward along the slide rail 81. The slider 82 slides on the slide rail 81 to ensure smooth movement of the second sign 4. When the second sign 4 rises to the position of the window 11, the upper half of the second sign 4 is located in front of the upper half of the first sign 3, and the lower half of the second sign 4 is located in front of the lower half of the first sign 3. At this time, the sign content on the second sign 4 can be seen through the window 11. The upper limit sensor 71 detects that the second sign 4 has risen to the correct position and controls the ball screw 21 to stop rotating, thus completing the switching.

[0021] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A variable sign, characterized in that, The device includes a frame, a drive assembly, a first sign, and a second sign. The drive assembly is fixed within the frame, and a window is provided on the frame through which the first sign or the second sign can be seen. The first sign is fixed within the frame, and the second sign is fixed to the drive assembly. When the drive assembly moves the second sign, the change in the sign can be seen through the window.

2. A variable flag as described in claim 1, characterized in that, The first sign and the second sign are both composed of a single plate. A first mounting bracket and a second mounting bracket are fixed within the frame. The drive assembly is fixed on the first mounting bracket. The first sign is fixed on the second mounting bracket and faces the window. When the second sign is located at the window position, the second sign is in front of the first sign.

3. A variable flag as described in claim 2, characterized in that, The drive assembly includes a ball screw fixed on the first mounting bracket, a nut screwed onto the ball screw, a second sign fixed to the nut, and the left and right sides of the second sign sliding up and down within the frame via a first sliding assembly.

4. A variable flag as described in claim 3, characterized in that, The first sliding assembly includes a slide groove and a roller. The slide groove is fixed on the second mounting bracket, the roller is slidably connected in the slide groove, and the second sign is fixed to the roller.

5. A variable flag as described in claim 1, characterized in that, Both the first and second signs are composed of two panels joined together. A first mounting bracket, a second mounting bracket, and a third mounting bracket are fixed within the frame. The upper half of the first sign is fixed to the third mounting bracket, and the upper half of the second sign is fixed to the drive assembly. The upper half of the first sign is located behind the upper half of the second sign. The lower half of the first sign is fixed to the third mounting bracket, and the lower half of the second sign is connected to the upper half of the second sign. The lower half of the first sign is located behind the lower half of the second sign.

6. A variable flag as described in claim 5, characterized in that, The drive assembly includes a ball screw fixed on the first mounting bracket, a nut screwed onto the ball screw, a second sign fixed to the nut, and the left and right sides of the second sign sliding up and down within the frame via a second sliding assembly.

7. A variable flag as described in claim 6, characterized in that, The second sliding assembly includes a slide rail and a slider. The slide rail is fixed on the second mounting bracket, the slider is slidably connected to the slide rail, and the second sign is fixed to the slider.

8. A variable flag as described in claim 4, characterized in that, The second mounting bracket is fixed with an upper limit sensor and a lower limit sensor. The upper limit sensor corresponds to the upper end of the slide groove, and the lower limit sensor corresponds to the lower end of the slide groove.

9. A variable flag as described in claim 7, characterized in that, The second mounting bracket is fixed with an upper limit sensor and a lower limit sensor. The upper limit sensor corresponds to the upper end of the slide rail, and the lower limit sensor corresponds to the lower end of the slide rail.

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