阅读说明：本技术 四面翻广告道闸 (Four-side turning advertisement road gate ) 是由 刘建国 陈森 于 2021-08-25 设计创作，主要内容包括：本发明涉及一种四面翻广告道闸,包括机箱总成和安装在机箱总成上的广告画面横杆机构,机箱总成内部设置机芯,机芯可控制广告画面横杆机构整体的起杆和落杆,广告画面横杆机构包括固定框架,在固定框架内通过叶片翻转机构安装菱形叶片组件；菱形叶片组件包括多组依次排列的菱形叶片单元,每组菱形叶片单元包括横截面为菱形结构的叶片主体和设置在叶片主体下端的连接转轴组件,叶片主体的四个面均贴设广告画面,叶片主体的一个内角度数记为α度,90°≤α＜180°,叶片翻转机构可同步驱动多组菱形叶片单元以α度和-α度正反向往复旋转,实现广告道闸正反两个展示面的各两幅广告画面的交替展示。(The invention relates to a four-side-turning advertising banister which comprises a case assembly and an advertising picture cross bar mechanism arranged on the case assembly, wherein a machine core is arranged in the case assembly and can control the whole lifting rod and the falling rod of the advertising picture cross bar mechanism; the rhombus blade subassembly includes the rhombus blade unit that the multiunit was arranged in proper order, every group rhombus blade unit includes that the cross section is the blade main part of rhombus structure and sets up the connection pivot subassembly at the blade main part lower extreme, the advertisement picture is all pasted to four faces of blade main part, an interior angle degree of blade main part is marked as alpha degree, alpha < 180 is not more than 90 degrees, but blade tilting mechanism synchronous drive multiunit rhombus blade unit is with alpha degree and-alpha degree positive and negative reciprocating rotation, realize the alternative show of each two advertisement pictures of two positive and negative show faces of advertisement banister.)

1. The four-side-turning advertising banister comprises a case assembly (1) and an advertising picture cross bar mechanism (2) arranged on the case assembly (1), wherein a machine core is arranged in the case assembly (1) and can control the integral lifting rod and the falling rod of the advertising picture cross bar mechanism (2), and the four-side-turning advertising banister is characterized in that the advertising picture cross bar mechanism (2) comprises a fixed frame (201), and a diamond-shaped blade assembly (9) is arranged in the fixed frame (201) through a blade turning mechanism; the diamond-shaped blade assembly (9) comprises a plurality of groups of diamond-shaped blade units which are sequentially arranged, each group of diamond-shaped blade units comprises a blade main body (901) with a diamond-shaped cross section and a connecting rotating shaft assembly arranged at the lower end of the blade main body (901), advertisement pictures are pasted on four sides of the blade main body (901), one internal angle of the blade main body (901) is recorded as alpha, alpha is more than or equal to 90 degrees and less than 180 degrees, the blade turnover mechanism can synchronously drive the plurality of groups of diamond-shaped blade units to rotate forward and backward in alpha degrees and-alpha degrees, and two advertisement pictures on the forward and backward display surfaces of the advertising barrier are alternately displayed.

2. The four-side-turning advertising banister according to claim 1, wherein the connecting rotary shaft assembly comprises a lower connecting base (911), a lower rotary shaft (912), a plug (913) and a compression spring (914), the lower connecting base (911) is disposed at the lower end of the blade body (901), the lower rotary shaft (912) is inserted into the lower connecting base (911) and can slide up and down relative to the lower connecting base, the lower end of the lower rotary shaft (912) is inserted into a lower rotary seat (915) disposed on the fixing frame 201, a dust cover (916) is disposed on the lower rotary seat (915), the plug (913) is mounted on the lower rotary shaft (912) through a snap fit, the compression spring (914) is disposed in the lower connecting base (911), one end of the compression spring presses against the plug (913), the other end of the compression spring presses against the lower rotary shaft (912), and the lower rotary shaft (912) is always pressed against the lower rotary seat (915) under the action of the resilient force of the compression spring (914).

3. The four-side-turning advertising banister according to claim 2, wherein the geneva gear is disposed in the cross bar of the fixed frame (201), and comprises a power mechanism (212), a long rotating shaft (211) and a plurality of geneva gear units connected to the long rotating shaft (211), each geneva gear unit is connected to a diamond-shaped blade unit; an output shaft of the power mechanism (212) is connected with the long rotating shaft (211), and a plurality of groups of long keys are arranged on the long rotating shaft (211); the sheave drive mechanism unit includes a primary engagement sheave (213), a primary engagement sheave holder (214), and a secondary engagement sheave (215); the main meshing wheel disc seat (214) is arranged in a cross bar of the fixed frame (201), a plurality of groups of main meshing wheel discs (213) are sequentially arranged on the long rotating shaft (211) in a penetrating mode and are clamped through a long key of the long rotating shaft (211), the main meshing wheel discs (213) are arranged in the main meshing wheel disc seat (214), and the lower end of the auxiliary meshing wheel groove (215) is connected with the upper end of the rhombic blade unit; the main meshing wheel disc (213) is provided with a disc with an opening, the opening of the disc is provided with a convex tooth, the auxiliary meshing sheave (215) comprises a base and a groove part which is arranged on the base and provided with two wings, the center of the groove part is provided with a groove, two sides of the groove part are limiting vertical surfaces, and the convex tooth of the main meshing wheel disc (213) extends into the groove to drive the auxiliary meshing sheave (215) to rotate; when the rotation angle of the auxiliary meshing sheave (215) is larger than alpha degrees, the disc of the main meshing wheel disc (213) is clamped with the limiting vertical surface, and at the moment, the main meshing wheel disc (213) cannot rotate continuously.

4. The four-side turning advertising banister according to claim 2, wherein the blade turning mechanism is a rack and pinion transmission structure, the rack and pinion transmission structure is arranged in a cross bar of the fixed frame (201), and comprises a power mechanism (212), a driven rack (216), a transmission rack (217), a connecting strip (218) and a plurality of sets of driven gear assemblies (219); the power mechanism (212) is fixed at the end part of a transverse rod of the fixed frame (201), the driven rack (216) is connected with the transmission rack (217) through the connecting strip (218), the power mechanism (212) drives the driven rack (216) to further drive the transmission rack (217) to move left and right, a plurality of groups of driven gear assemblies (219) are sequentially arranged on one side of the transmission rack (217), each driven gear assembly (219) comprises a gear seat (2101), a driven gear (2102), a driven rotating shaft and two bearings, the driven rotating shaft is fixedly arranged in the center of the driven gear (2102), the lower end of the driven rotating shaft is connected with the upper end of the rhombic blade unit, the driven rotating shaft is arranged on the gear seat (2101) through the upper bearing and the lower bearing, the driven gear (2102) is meshed with the transmission rack (217), and the driven gear (2102) is driven to rotate through the movement of the transmission rack (217).

5. The four-side-turning advertising banister according to claim 2, wherein the blade turning mechanism is a bevel gear transmission mechanism, the bevel gear transmission mechanism is arranged in a cross bar of the fixed frame (201), and comprises a power mechanism (212), a transmission shaft (2105), a driving bevel gear (2106) and a driven bevel gear assembly (2107); the power mechanism (212) is fixed at the end part of the cross rod on the fixed frame (201) and drives the transmission shafts (2105) to rotate, a plurality of driving bevel gears (2106) are respectively arranged on one transmission shaft (2105), the lower ends of the driven bevel gear assemblies (2107) are connected with the upper ends of the rhombic blade units, and each driving bevel gear (2106) is meshed with one group of driven bevel gear assemblies (2107).

6. The four-side-turning advertising banister according to claims 3 to 5, wherein a light bar fixing profile (4) is arranged on both sides of the diamond blade assembly (9) of the fixing frame, and the light bar (3) is arranged in the light bar fixing profile.

7. The four-side-turning advertising banister according to claim 6, wherein a support member (204) is connected to a lower end of the fixed frame (201).

8. The four-side-turning advertising banister according to claim 7, wherein a telescopic rod assembly (205) is inserted through the outside of the fixed frame (201).

Technical Field

The invention belongs to the technical field of barriers, and particularly relates to a four-side-turning advertising barrier.

Background

Along with the continuous development and progress of society, the living standard of people is improved, and more motor vehicles are provided, so that advertising companies move the traditional ground media to residential districts, commercial office building parking lots and social parking lots in the development and propagation of new media, and an advertising barrier is generated accordingly; due to the advantages of strong consumption capability of audiences, strong visual impact of advertisement pictures, mandatory display and the like, the advertisement picture is widely applied in recent years.

At present, a four-side-turning advertising barrier gate commonly used in the market is provided with a front row of blades and a rear row of blades, two advertising pictures can be pasted on the front and the rear sides of each row of blades, the front and the rear rows of blades have four pictures, the front and the rear rows of blades are driven by a transmission mechanism to rotate in a forward and reverse reciprocating mode for 180 degrees, and the four-fortune advertising pictures are alternately displayed. The structure is complex, the failure rate is high, the maintenance is troublesome, the picture can not be displayed after the brake lever is lifted, and the picture display time is short.

Disclosure of Invention

The invention provides a four-side turning advertisement barrier gate which solves the problems that the four-side turning advertisement barrier gate in the prior art can be realized only by two rows of blades, the driving structure is complex, the manufacturing cost is high, the failure rate is high and the like.

The technical scheme adopted by the invention is as follows:

the four-side turning advertisement barrier gate comprises a case assembly and an advertisement picture cross bar mechanism arranged on the case assembly, wherein a machine core is arranged in the case assembly, the machine core can control the lifting rod and the falling rod of the whole advertisement picture cross bar mechanism, the advertisement picture cross bar mechanism comprises a fixed frame, and a diamond-shaped blade assembly is arranged in the fixed frame through a blade turning mechanism; the diamond-shaped blade assembly comprises a plurality of groups of diamond-shaped blade units which are sequentially arranged, each group of diamond-shaped blade units comprises a blade main body with a diamond-shaped cross section and a connecting rotating shaft assembly arranged at the lower end of the blade main body, advertisement pictures are attached to four faces of the blade main body, one internal angle of the blade main body is recorded as alpha degree, alpha is more than or equal to 90 degrees and less than 180 degrees, the blade turnover mechanism can synchronously drive the plurality groups of diamond-shaped blade units to rotate forward and backward in alpha degree and-alpha degree, and the alternate display of two advertisement pictures of the forward and backward two display faces of the advertisement barrier gate is realized.

Further, connect the pivot subassembly and include lower connecting seat, lower pivot, end cap and pressure spring, lower connecting seat sets up the lower extreme at the blade main part, the lower pivot inserts down in the connecting seat and can slide from top to bottom it, the lower extreme of lower pivot inserts in the lower swivel mount that sets up on the fixed frame, set up the dust cover on the lower swivel mount, the end cap passes through the buckle and installs under in the pivot, the pressure spring sets up under in the connecting seat, its one end pressure is on the end cap, the other end pressure is in the pivot down, make pivot down under the effect of pressure spring rebound force) all the time with the lower swivel mount top tightly.

Furthermore, the sheave transmission mechanism is arranged in the cross bar of the fixed frame and comprises a power mechanism, a long rotating shaft and a plurality of sheave driving mechanism units connected to the long rotating shaft, and each sheave driving mechanism unit is connected with one group of rhombic blade units; the output shaft of the power mechanism is connected with a long rotating shaft, and a plurality of groups of long keys are arranged on the long rotating shaft; the sheave driving mechanism unit comprises a main meshing wheel disc, a main meshing wheel disc seat and an auxiliary meshing sheave; the main meshing wheel disc seat is arranged in a cross rod of the fixed frame, a plurality of groups of main meshing wheel discs sequentially penetrate through the long rotating shaft and are clamped through a long key of the long rotating shaft, the main meshing wheel discs are arranged in the main meshing wheel disc seat, and the lower ends of the auxiliary meshing wheel wheels are connected with the upper ends of the rhombic blade units; the main meshing wheel disc is provided with a disc with an opening, the opening of the disc is provided with a convex tooth, the auxiliary meshing sheave comprises a base and a groove part with two wings, the groove part is arranged on the base, the center of the groove part is provided with a groove, two sides of the groove part are limiting vertical surfaces, and the convex tooth of the main meshing wheel disc extends into the groove to drive the auxiliary meshing sheave to rotate; when the rotation angle of the auxiliary meshing grooved wheel is larger than alpha degrees, the disc of the main meshing wheel disc is clamped with the limiting vertical surface, and at the moment, the main meshing wheel disc cannot rotate continuously.

Furthermore, the blade turnover mechanism is a gear and rack transmission structure, the gear and rack transmission structure is arranged in a cross bar of the fixed frame, and the blade turnover mechanism comprises a power mechanism, a driven rack, a transmission rack, a connecting strip and a plurality of groups of driven gear assemblies; the power mechanism is fixed at the end part of the transverse rod of the fixed frame, the driven rack is connected with the transmission rack through the connecting strip, the power mechanism drives the driven rack to move left and right through driving the driven rack, the multiple groups of driven gear assemblies are sequentially arranged on one side of the transmission rack, each driven gear assembly comprises a gear seat, a driven gear, a driven rotating shaft and two bearings, the driven rotating shaft is fixedly arranged at the center of the driven gear, the lower end of the driven rotating shaft is connected with the upper end of the rhombic blade unit, the driven rotating shaft is installed on the gear seat through the upper bearing and the lower bearing, the driven gear is meshed with the transmission rack, and the driven gear is driven to rotate through the movement of the transmission rack.

Furthermore, the blade turnover mechanism is a bevel gear transmission structure, the bevel gear transmission mechanism is arranged in a cross rod of the frame and comprises a power mechanism, a transmission shaft, a driving bevel gear and a driven bevel gear assembly; the power mechanism is fixed at the end part of the upper cross rod and drives the transmission shafts to rotate, a plurality of driving bevel gears are arranged on one transmission shaft respectively, the lower ends of the driven bevel gear assemblies are connected with the upper ends of the rhombic blade units, and each driving bevel gear is meshed with one group of driven bevel gear assemblies.

Furthermore, both sides of the rhombic blade assembly of the fixed frame are provided with light bar fixing profiles, and light bars are arranged in the light bar fixing profiles.

Furthermore, a support component is connected to the lower end of the fixed frame.

Furthermore, the telescopic rod component is arranged outside the fixed frame in a penetrating mode.

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

1. the blade unit has a rhombic cross section and comprises four display surfaces capable of being adhered with advertisements, and the blade turnover mechanism drives the blade assembly in a row to intermittently rotate in a forward and reverse reciprocating manner, so that the effect of alternately displaying four advertisement pictures of the blade assembly in the row is realized.

2. Compared with the existing four-side-turning advertisement barrier gate, the four-side-turning advertisement barrier gate can display four advertisement pictures only by using the single row of diamond-shaped blade assemblies, and has the advantages of simple structure, convenience in installation and lower cost.

3. The four-side-turning advertising banister can display pictures in the rod lifting and rod falling states, and the pictures are perfectly displayed 24 hours a day.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a perspective assembly view of embodiment 1 of the present invention;

fig. 3 is a perspective assembly view of the whole sheave drive mechanism according to embodiment 1 of the present invention;

fig. 4 is a sectional view of a sheave drive mechanism according to embodiment 1 of the present invention;

fig. 5 is a perspective assembly view of a geneva gear mechanism of embodiment 1 of the invention;

FIG. 6 is a schematic sectional view showing example 1 of the present invention;

FIG. 7 is a schematic view of the diamond blade assembly and the connecting shaft assembly according to the present invention;

FIG. 8 is a top view of a diamond shaped blade unit of the present invention;

FIG. 9 is a schematic cross-sectional view of a blade body of the present invention;

FIG. 10 is a schematic diagram illustrating the rotation of a diamond blade assembly according to the present invention;

FIG. 11 is a schematic view of an upper horizontal rod assembly of a rack and pinion drive according to embodiment 2 of the present invention;

fig. 12 is a gear rack drive schematic diagram of embodiment 2 of the invention;

fig. 13 is a schematic structural view of a bevel gear transmission according to embodiment 3 of the present invention;

fig. 14 is a schematic view of the bevel gear structure and the diamond blade assembly according to embodiment 3 of the present invention.

In the figure, the position of the upper end of the main shaft,

1-a chassis assembly;

2-advertisement picture cross bar mechanism;

201-fixed frame, 204-support assembly, 205-telescopic rod assembly;

211-long rotating shaft, 212-power mechanism, 213-primary meshing wheel disc, 214-primary meshing wheel disc seat, 215-secondary meshing sheave;

216-passive rack, 217-drive rack, 218-connecting bar, 219-passive gear assembly, 2101-gear holder, 2102-passive gear;

2105-drive shaft, 2106-driving bevel gear, 2107-driven bevel gear assembly;

3, a light bar;

4-fixing the light bar into a section bar;

9-a diamond blade assembly;

901-blade main body, 911-lower connecting seat, 912-lower rotating shaft, 913-plug, 914-pressure spring, 915-lower rotating seat and 916-dustproof cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The basic idea of the invention is to realize the alternate display of three advertisement pictures at one side of the advertisement barrier gate and the fixed display of the advertisement pictures at the other side through the design of a mechanical structure.

Example 1:

four-side turning advertisement road gate driven by sheave transmission mechanism

Referring to fig. 1 and 2, the four-side-turning advertising banister comprises a case assembly 1 and an advertising picture cross bar mechanism 2 installed on the case assembly 1, wherein a movement is arranged in the case assembly 1, the movement can control the raising and lowering of the advertising picture cross bar mechanism 2 as a whole, the advertising picture cross bar mechanism 2 comprises a fixed frame 201, and a diamond-shaped blade assembly 9 is installed in the advertising banister fixed frame 201 through a blade turning mechanism; the rhombic blade assembly 9 comprises a plurality of groups of rhombic blade units which are sequentially arranged, and referring to fig. 7 and 8, each group of rhombic blade units comprises a blade main body 901 with a rhombic cross section and a connecting rotating shaft assembly arranged at the lower end of the blade main body 901, advertisement pictures A, B, C, D are attached to four faces of the blade main body 901, one internal angle of the blade main body 901 is recorded as alpha, alpha is more than or equal to 90 degrees and less than 180 degrees, alpha is 120 degrees in the embodiment, the blade turnover mechanism can synchronously drive the plurality of groups of rhombic blade units to rotate forward and backward at 120 degrees and 120 degrees, and the alternate display of two total four advertisement pictures on the forward and backward two display faces of the advertising barrier gate is realized.

The two sides of the rhombic blade component 9 of the fixed frame are both provided with light bar fixing profiles 4, light bars 3 are arranged in the light bar fixing profiles 4, and the light bars 3 can illuminate advertising pages on the two sides of the rhombic blade component 9.

Referring to fig. 6 and 7, the connecting rotating shaft assembly includes a lower connecting seat 911, a lower rotating shaft 912, a plug 913 and a pressure spring 914, the lower connecting seat 911 is disposed at the lower end of the blade main body 901, the lower rotating shaft 912 is inserted into the lower connecting seat 911 and can slide up and down relative to the lower connecting seat, the lower end of the lower rotating shaft 912 is inserted into a lower rotating seat 915 disposed on the fixed frame 201, a dust cover 916 is disposed on the lower rotating seat 915, the pressure spring 914 is disposed in the lower connecting seat 911, one end of the pressure spring 914 is pressed on the plug 913, the other end of the pressure spring is pressed on the lower rotating shaft 912, the lower rotating shaft 912 is always pressed against the lower rotating seat 915 under the action of the elastic force of the pressure spring 914, and the diamond-shaped blade unit is prevented from falling off due to the distance change between the upper and lower cross bars of the fixed frame 201.

Referring to fig. 3, 4 and 5, in the present embodiment, the blade turning mechanism is a sheave transmission mechanism, the sheave transmission mechanism is disposed in the cross bar of the fixed frame 201, and includes a power mechanism 212, a long rotating shaft 211 and a plurality of sheave drive mechanism units connected to the long rotating shaft 211, each sheave drive mechanism unit is connected to a group of diamond-shaped blade units; the output shaft of the power mechanism 212 is connected with the long rotating shaft 211, and a plurality of groups of long keys are arranged on the long rotating shaft 211; the sheave drive mechanism unit includes a primary engagement sheave 213, a primary engagement sheave holder 214, and a secondary engagement sheave 215; the main meshing wheel disc seat 214 is arranged in the cross bar of the fixed frame 201, and a plurality of groups of main meshing wheel discs 213 are sequentially arranged on the long rotating shaft 211 in a penetrating way, are clamped by a long key of the long rotating shaft 211 and synchronously rotate along with the long rotating shaft 211; the primary meshing wheel disc 213 is arranged in the primary meshing wheel disc seat 214, the lower end of the secondary meshing sheave 215 is connected with the upper end of the rhombic blade unit, and the upper end of the secondary meshing sheave is matched with the primary meshing wheel disc seat 214 and can rotate relative to the primary meshing wheel disc seat; the main meshing wheel disc 213 is provided with a disc with an opening, the opening of the disc is provided with a convex tooth, the auxiliary meshing sheave 215 comprises a disc-shaped base and a groove part with two wings, the groove part is arranged in the center of the groove part, two sides of the groove part are limiting vertical surfaces, and the convex tooth of the main meshing wheel disc 213 can extend into the groove to drive the auxiliary meshing sheave 215 to rotate; when the rotation angle of the disc of the primary engagement wheel disc 213 reaches α degrees (120 degrees in this embodiment) at the secondary engagement sheave 215, the disc is parallel to the limit vertical surface of the secondary engagement sheave 215, and switching of advertisement pictures can be performed; if the disk of the primary engaging wheel 213 is locked with the vertical limiting surface when the rotation angle of the secondary engaging sheave 215 is greater than α degrees (120 degrees in this embodiment), the primary engaging wheel 213 cannot rotate continuously, but the power mechanism 212 can rotate in the reverse direction under the reverse driving force.

The telescopic rod assembly 205 is inserted through the outer side of the fixed frame 201, so that the length of the barrier gate can be adjusted according to the width of the channel.

The lower end of the fixed frame 201 is connected with a supporting component 204, and the lower end of the supporting component 204 is contacted with the ground, so that the shaking of the advertisement picture cross bar mechanism 2 when the barrier gate is closed in place is reduced.

The four-side display and rotation principle of the invention is as follows:

referring to fig. 8 and 9, the section of the blade body 901 is a rhombus, the obtuse angle of the blade body is α (in this embodiment, α is 120 degrees), the acute angle adjacent to the obtuse angle is 180- α, the front and rear display surfaces of the blade are A, B surfaces, and the display surface hidden inside is C, D surfaces; referring to fig. 10(a), the power mechanism 212 drives the rhombic blade assembly 9 to rotate by α degrees, and referring to fig. 10(b), the front and rear display surfaces are switched to C, D surfaces;

similarly, the power mechanism drives the blade to rotate in the reverse direction by alpha degrees, and the front and rear display surfaces are switched back to A, B surfaces; in this way, the power mechanism 212 intermittently drives the moving blade to rotate forward and backward by α degrees, thereby realizing the alternate display of four advertisement pictures.

Example 2:

four-side turning advertisement road gate driven by gear and rack

Referring to fig. 10, unlike embodiment 1, a rack and pinion driven blade overturning mechanism is provided in the upper cross bar of the fixed frame 201, and includes a power mechanism 212, a driven rack 216, a driving rack 217, a connecting bar 218, and a plurality of sets of driven gear assemblies 219; the power mechanism 212 is fixed at the end of the upper cross bar 201, the driven rack 216 is connected with the transmission rack 217 through the connecting strip 218, the power mechanism 212 drives the driven rack 216 to further drive the transmission rack 217 to move left and right in a reciprocating manner, and a plurality of groups of driven gear assemblies 219 are sequentially arranged on one side of the transmission rack 217.

As shown in fig. 11, the driven gear assembly 219 includes a gear seat 2101, a driven gear 2102, a driven rotating shaft, and two bearings, the driven rotating shaft is fixedly disposed in the center of the driven gear 2102, the lower end of the driven rotating shaft is connected with the upper end of the rhombic vane unit, the driven rotating shaft is mounted on the gear seat 2101 through the upper and lower bearings, and the driven gear 2102 is engaged with the transmission rack 217.

The movement of the driving rack 217 can drive the driven gear 2102 to intermittently rotate by alpha degrees and-alpha degrees, thereby realizing the alternate display of four advertisement pictures.

Example 3:

bevel gear driven four-side turning advertisement road gate

Referring to fig. 12, unlike embodiment 1, a bevel-gear-driven blade turnover mechanism is provided in the upper cross bar of the fixed frame 201, and includes a power mechanism 212, a transmission shaft 2105, a driving bevel gear 2106, and a driven bevel gear assembly 2107; the power mechanism 212 is fixed at the end of the upper cross bar 201 and drives the transmission shafts 2105 to rotate, and a plurality of driving bevel gears 2106 are respectively arranged on one transmission shaft 2105.

As shown in fig. 13, the lower end of the passive bevel gear assembly 2107 is connected to the upper end of the diamond-shaped blade unit, and each passive bevel gear assembly 2107 is engaged with one driving bevel gear 2106 to drive the diamond-shaped blade unit to rotate by α degrees and- α degrees intermittently, thereby realizing the alternate display of four advertisement pictures.

The above are specific embodiments of the present invention, but the structural features of the present invention are not limited thereto, and the present invention can be applied to similar products, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the claims of the present invention.