Supporting base for advertisement signboard

Abstract

The utility model provides a support base for an advertisement signboard, which comprises a support base, transmission shafts, a retraction mechanism and universal wheels, the two transmission shafts are rotatably mounted in the support base, and a driving handle is fixedly mounted at one end of one of the transmission shafts; the folding and unfolding mechanism is mounted on the supporting base and the transmission shaft, and the four universal wheels are fixedly mounted on the folding and unfolding mechanism; according to the folding and unfolding mechanism, the cam and the worm and gear mechanism are ingeniously combined, and flexible folding and unfolding of the universal wheel of the advertisement signboard are achieved. During moving, the universal wheels extend out freely, and moving is convenient; and in a stable state, the folding and unfolding mechanism is operated to fold the universal wheels, so that the base is in close contact with the ground, and the stability is greatly enhanced. By means of the design, the stability in the stable mode is guaranteed, excellent mobility is reserved, a user can easily switch the moving mode and the stable mode, and the practicability and convenience of the advertisement signboard are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of advertising signboard bases, and in particular relates to a supporting base for advertising signboards. Background Art

[0002] Signs, as an important tool for indication and guidance, carry diversified information such as text and patterns, aiming to clearly indicate directions and issue necessary warnings. There are many types of common signs, including but not limited to public welfare signs, cultural signs, instruction signs and warning signs. However, in order to ensure that these advertising signs can stably display their publicity effects, the design of the support base is particularly important.

[0003] Currently, in order to meet the mobility requirements of advertising signs, most bases are equipped with universal wheels. However, although universal wheels bring convenience, their contact area with the ground is relatively small, which to some extent weakens the overall stability. Existing solutions usually rely on self-locking functions to ensure stability, but in actual use, this design often fails to achieve the desired stability while maintaining mobility convenience.

[0004] Therefore, it is very necessary to invent a support base for advertising signboards. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a support base for an advertising sign, comprising a support base, a transmission shaft, a retractable mechanism and a universal wheel, wherein two transmission shafts are rotatably mounted inside the support base, and a driving handle is fixedly mounted on one end of one of the transmission shafts; the retractable mechanism is mounted on the support base and the transmission shaft, and four universal wheels are fixedly mounted on the retractable mechanism;

[0006] The retractable mechanism includes a retractable rack, a hinge, a roller, a cam, a worm wheel and a worm. Two retractable racks are provided, one end of the two retractable racks are rotatably connected to each other through a rotating shaft, and the retractable racks are connected to the supporting base through the hinge; two universal wheels are fixedly installed on each of the retractable racks; the roller rotatably installed on the retractable rack is in close contact with the outer surface of the cam; the cam and the worm wheel are both fixedly installed on one of the transmission shafts, the worm is meshed with the worm wheel, and the worm is fixedly connected to the other transmission shaft.

[0007] Preferably, the retractable rack is a "T"-shaped structure, the two retractable racks are an "I"-shaped structure, and the retractable racks are located below the cam.

[0008] Preferably, the rollers rotatably mounted on the two retractable racks are arranged on one side of each other and one side of the rotating shaft, and the two rollers are located on both sides below the cam.

[0009] Preferably, the cam is located on one side of the worm wheel and the worm, the cam and the worm wheel are fixedly mounted on the same transmission shaft, and the worm wheel is fixed to another transmission shaft on which a driving handle is mounted, and the transmission shaft rotates through the support base and is fixedly connected to an external driving handle.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model abandons the traditional method of simply relying on the self-locking of the universal wheel to ensure the overall stability, and instead cleverly introduces an innovative retracting and extending mechanism. The mechanism cleverly combines the principles of the cam mechanism and the worm gear mechanism to achieve the flexible retracting and extending function of the universal wheel. When it needs to be moved, the universal wheel can be extended freely to ensure that the advertising sign can be easily moved; and when it needs to be placed stably, the universal wheel can be retracted by operating the retracting and extending mechanism, so that the entire base is in close contact with the ground, thereby greatly enhancing the overall stability. This design not only ensures the good stability of the advertising sign in the stable placement mode, but also retains its excellent mobility, allowing users to easily switch freely between the mobile mode and the stable placement mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the retractable and unfolding mechanism of the utility model.

[0014] Figure 3 This utility model Figure 2 Schematic diagram of the local enlarged structure at A.

[0015] In the figure:

[0016] Support base 1, transmission shaft 2, retractable mechanism 3, retractable frame 31, hinge 32, roller 33, cam 34, worm gear 35, worm 36, universal wheel 4. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0018] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0019] As attached Figure 1 To Attachment Figure 3 As shown:

[0020] The utility model provides a support base for an advertising signboard, comprising a support base 1, a transmission shaft 2, a retractable mechanism 3 and a universal wheel 4, wherein two transmission shafts 2 are rotatably installed inside the support base 1, and a driving handle is fixedly installed on one end of one of the transmission shafts 2; the retractable mechanism 3 is installed on the support base 1 and the transmission shaft 2, and four universal wheels 4 are fixedly installed on the retractable mechanism 3.

[0021] The retractable mechanism 3 includes a retractable frame 31, a hinge 32, a roller 33, a cam 34, a worm wheel 35 and a worm 36. Two retractable frames 31 are provided, one end of the two retractable frames 31 is connected to each other by a rotating shaft, and the retractable frame 31 is connected to the support base 1 through the hinge 32; two universal wheels 4 are fixedly installed on each retractable frame 31; the roller 33 rotatably installed on the retractable frame 31 is in close contact with the outer surface of the cam 34; the cam 34 and the worm wheel 35 are fixedly installed on one of the transmission shafts 2, the worm 36 is meshed and connected with the worm wheel 35, and the worm 36 is fixedly connected to the other transmission shaft 2. The retractable mechanism 3 realizes the flexible retractable function of the universal wheel 4, so that the user can easily switch freely between the mobile mode and the stable placement mode.

[0022] Embodiment 1:

[0023] Specifically, the retractable rack 31 is a "T"-shaped structure, which can provide stable support and easy operation. The two retractable racks 31 are in an "I"-shaped structure, which not only enhances the stability of the entire mechanism, but also makes the operation more convenient. The retractable rack 31 is located below the cam 34, ensuring that when the cam 34 rotates, it can stably support and drive the retraction and extension of the universal wheel 4.

[0024] Specifically, each of the two retractable racks 31 is rotatably mounted with a roller 33. The two rollers 33 are designed to be arranged on one side of each other and on one side of the rotating shaft, forming a stable symmetrical layout. Not only does it ensure the balance of the structure, but it also enables the two rollers 33 to move synchronously during the retractable process, thereby ensuring the smooth lifting and lowering of the universal wheel 4. At the same time, the two rollers 33 are located on both sides below the cam 34. The cam 34 is a key component for driving the roller 33 to rotate. It generates a specific motion trajectory through rotation, thereby driving the roller 33 to move up and down along the rotating shaft. This design enables the roller 33 to accurately follow the motion trajectory of the cam 34 to be lifted and lowered, thereby realizing the retractable function of the universal wheel 4. When the advertising sign needs to be moved, the cam 34 rotates to make the roller 33 move downward along the rotating shaft, thereby pushing out the universal wheel 4, so that the advertising sign can move freely. When the advertising sign needs to be placed stably, the cam 34 rotates in the opposite direction, causing the roller 33 to move upward along the rotating shaft, retracting the universal wheel 4, so that the entire base is in close contact with the ground, thereby ensuring the stability of the advertising sign.

[0025] Specifically, the cam 34 is located on one side of the worm wheel 35 and the worm 36. The cam 34 and the worm wheel 35 are fixedly mounted on the same transmission shaft 2, so that the rotation of the worm wheel 35 can directly drive the cam 34 to rotate. At the same time, since they are all fixed on the same transmission shaft 2, the synchronization and stability of the rotation are guaranteed, and the worm wheel 35 is fixed to another transmission shaft 2 equipped with a driving handle, and the transmission shaft 2 rotates through the support base 1 and is fixedly connected to the external driving handle. The user can easily rotate the worm 36 by operating the external driving handle, thereby driving the worm wheel 35 and the cam 34 to rotate. During the retracting and releasing process, the user rotates the driving handle to rotate the worm 36, thereby driving the worm wheel 35 and the cam 34 to rotate. The rotation of the cam 34 will drive the roller 33 on the retracting and releasing frame 31 to perform lifting and lowering movements, thereby realizing the retracting and releasing of the universal wheel 4.

[0026] Embodiment 2:

[0027] When the user needs to move the advertising sign, the worm 36 is rotated by operating the driving handle, thereby driving the worm wheel 35 and the cam 34 to rotate. The rotation of the cam 34 causes the roller 33 to move downward along the rotation axis, pushing the retractable frame 31 to unfold, pushing out the universal wheel 4, and allowing the advertising sign to move freely. When the user needs to place the advertising sign stably, the driving handle is reversed to cause the worm 36 to rotate in the opposite direction, thereby driving the worm wheel 35 and the cam 34 to rotate in the opposite direction. The reverse rotation of the cam 34 causes the roller 33 to move upward along the rotation axis, pulling the retractable frame 31 to retract, and putting the universal wheel 4 into the support base 1, so that the support base 1 as a whole is in close contact with the ground, ensuring the stability of the advertising sign.

[0028] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A support base for an advertising sign, characterized in that: The invention comprises a support base (1), a transmission shaft (2), a retractable mechanism (3) and a universal wheel (4); two transmission shafts (2) are rotatably mounted inside the support base (1), and a driving handle is fixedly mounted on one end of one of the transmission shafts (2); the retractable mechanism (3) is mounted on the support base (1) and the transmission shaft (2), and four universal wheels (4) are fixedly mounted on the retractable mechanism (3); The retractable mechanism (3) comprises a retractable frame (31), a hinge (32), a roller (33), a cam (34), a worm wheel (35) and a worm (36). Two retractable frames (31) are provided, one end of the two retractable frames (31) are rotatably connected to each other via a rotating shaft, and the retractable frames (31) are connected to the support base (1) via the hinge (32); two universal wheels (4) are fixedly mounted on each retractable frame (31); the roller (33) rotatably mounted on the retractable frame (31) is in close contact with the outer surface of the cam (34); the cam (34) and the worm wheel (35) are both fixedly mounted on one of the transmission shafts (2), the worm (36) is meshedly connected to the worm wheel (35), and the worm (36) is fixedly connected to the other transmission shaft (2).

2. A support base for an advertising signboard according to claim 1, characterized in that: The retractable rack (31) is a "T"-shaped structure, and the two retractable racks (31) are in an "I"-shaped structure. The retractable racks (31) are located below the cam (34).

3. A support base for an advertising signboard as claimed in claim 1, characterized in that: The rollers (33) rotatably mounted on the two retractable racks (31) are arranged on one side of each other and one side of the rotating shaft, and the two rollers (33) are located on both sides below the cam (34).

4. A support base for an advertising sign as claimed in claim 1, characterized in that: The cam (34) is located on one side of the worm wheel (35) and the worm (36). The cam (34) and the worm wheel (35) are fixedly mounted on the same transmission shaft (2), and the worm wheel (35) is fixed to another transmission shaft (2) on which a driving handle is mounted. The transmission shaft (2) rotates through the support base (1) and is fixedly connected to an external driving handle.

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